U.S. patent application number 14/705484 was filed with the patent office on 2015-08-20 for handheld abrading machine.
The applicant listed for this patent is FLEX-ELEKTROWERKZEUGE GMBH. Invention is credited to Udo Panzer, Dirk Roeck, Joachim Walker.
Application Number | 20150231755 14/705484 |
Document ID | / |
Family ID | 49726759 |
Filed Date | 2015-08-20 |
United States Patent
Application |
20150231755 |
Kind Code |
A1 |
Roeck; Dirk ; et
al. |
August 20, 2015 |
HANDHELD ABRADING MACHINE
Abstract
A handheld abrading machine is provided which includes a holding
device, a drive motor and a tool head, wherein the holding device
includes a substantially tubular bar which has a proximal end and a
distal end, wherein the drive motor is arranged at the proximal
end, wherein the tool head is arranged at the distal end, wherein
the abrading machine includes a transmission shaft which connects
the drive motor to a tool holder of the tool head for transmitting
torque thereto and which runs at least in sections thereof within
the tubular bar, wherein the tubular bar includes an engagement
region which is gripped by a user when the abrading machine is
effecting an abrading action. A center of gravity of the drive
motor and a center of gravity of the tool head can be located on
mutually opposite sides of a longitudinal axis of the tubular
bar.
Inventors: |
Roeck; Dirk; (Ingersheim,
DE) ; Panzer; Udo; (Weissach, DE) ; Walker;
Joachim; (Steinheim, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FLEX-ELEKTROWERKZEUGE GMBH |
Steinheim/Murr |
|
DE |
|
|
Family ID: |
49726759 |
Appl. No.: |
14/705484 |
Filed: |
May 6, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2013/075556 |
Dec 4, 2013 |
|
|
|
14705484 |
|
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|
|
Current U.S.
Class: |
451/177 |
Current CPC
Class: |
B24B 7/184 20130101;
B24B 23/02 20130101; B24B 55/102 20130101 |
International
Class: |
B24B 23/02 20060101
B24B023/02 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 7, 2012 |
DE |
102012111990.2 |
Claims
1. A handheld abrading machine comprising a holding device for
holding the abrading machine, a drive motor and a tool head,
wherein the holding device comprises a substantially tubular bar
which has a proximal end and a distal end, wherein the drive motor
is arranged at the proximal end, wherein the tool head is arranged
at the distal end, wherein the abrading machine comprises a
transmission shaft which connects the drive motor to a tool holder
of the tool head for transmitting torque thereto and which runs
within the tubular bar at least in sections thereof, wherein the
tubular bar comprises an engagement region which is gripped by a
user when the abrading machine is effecting an abrading action,
wherein a center of gravity of the handheld abrading machine is
arranged within the tubular bar, wherein a center of gravity of the
drive motor and a center of gravity of the tool head are located on
mutually opposite sides of a longitudinal axis of the tubular
bar.
2. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft rotational axis of the drive motor is
oriented substantially parallel to the longitudinal axis of the
tubular bar.
3. The handheld abrading machine in accordance with claim 1,
wherein the longitudinal axis of the tubular bar is at least one of
a longitudinal axis, an axis of symmetry or a mid axis of a central
section of the tubular bar between the drive motor and the tool
head.
4. The handheld abrading machine in accordance with claim 3,
wherein the longitudinal axis of the tubular bar is at least one of
a longitudinal axis, an axis of symmetry or a mid axis of a central
linear section of the tubular bar between the drive motor and the
tool head.
5. The handheld abrading machine in accordance with claim 1,
wherein the longitudinal axis of the tubular bar is a longitudinal
axis of an engagement region of the tubular bar which is gripped by
a user when the abrading machine is effecting an abrading
action.
6. The handheld abrading machine in accordance with claim 1,
wherein the tubular bar comprises one or more guide elements for
the guidance of the transmission shaft.
7. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft of the drive motor and an end of the
transmission shaft towards the drive motor are mutually offset with
respect to at least one of a direction running perpendicularly to
the longitudinal axis of the tubular bar or a direction running
parallel to the longitudinal axis of the tubular bar.
8. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft rotational axis, a rotational axis of an end
of the transmission shaft towards the drive motor and/or a
rotational axis of a section of the transmission shaft running in
the engagement region of the tubular bar are at least approximately
mutually parallel.
9. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft rotational axis, a rotational axis of an end
of the transmission shaft towards the drive motor and/or a
rotational axis of a section of the transmission shaft running in
the engagement region of the tubular bar are mutually offset with
respect to a direction running perpendicularly to the longitudinal
axis of the tubular bar.
10. The handheld abrading machine in accordance with claim 1,
wherein the drive motor and the transmission shaft are connected to
one another by means of an offsetting device by means of which a
rotational movement of a motor shaft of the drive motor is
transferable to an end of the transmission shaft which is towards
the drive motor and is offset relative to the motor shaft.
11. The handheld abrading machine in accordance with claim 10,
wherein the offsetting device comprises a gear wheel device for the
transmission of the rotational movement.
12. The handheld abrading machine in accordance with claim 10,
wherein the offsetting device comprises a toothed belt device for
the transmission of the rotational movement.
13. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft of the drive motor and an end of the
transmission shaft towards the drive motor are at least
approximately mutually coaxial.
14. The handheld abrading machine in accordance with claim 1,
wherein a motor shaft of the drive motor and a section of the
transmission shaft running in the engagement region of the tubular
bar are mutually offset with respect to a direction running
perpendicularly to the longitudinal axis of the tubular bar.
15. The handheld abrading machine in accordance with claim 14,
wherein the motor shaft of the drive motor and the section of the
transmission shaft running in the engagement region of the tubular
bar are connected to one another by means of a flexible section of
the transmission shaft.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of International
Application No. PCT/EP2013/075556, filed on Dec. 4, 2013, and
claims the benefit of German Application No. 10 2012 111 990.2,
filed on Dec. 7, 2012, which are incorporated herein by reference
in their entirety and for all purposes.
FIELD OF DISCLOSURE
[0002] The present invention relates to a handheld abrading machine
which comprises a holding device for holding the abrading machine,
a drive motor and a tool head. The holding device comprises a
substantially tubular bar which has a proximal end and a distal
end, wherein the drive motor is arranged at the proximal end and
wherein the tool head is arranged at the distal end. Furthermore,
the handheld abrading machine comprises a transmission shaft which
connects the drive motor to a tool holder of the tool head for
transmitting torque thereto and which, at least in sections
thereof, runs within the tubular bar.
BACKGROUND
[0003] A handheld abrading machine is known from DE 10 2005 021 153
A1, for example.
SUMMARY OF THE INVENTION
[0004] The object of the present invention is to provide a handheld
abrading machine which allows the abrasion process to be simple,
efficient and as fatigue-free as possible.
[0005] This object is achieved by a handheld abrading machine in
accordance with claim 1.
[0006] In one embodiment of the invention, provision is made for
the abrading machine to comprise a suction device which comprises a
suction channel having a substantially ring-shaped or
ring-section-shaped suction channel section.
[0007] A ring-section-shaped suction channel section is to be
understood, in particular, as a section of a suction channel having
a shape which corresponds at least approximately to a section of a
ring, a segment of a ring or a sector of a ring.
[0008] It can be advantageous if the substantially ring-shaped or
ring-section-shaped suction channel section surrounds a coupling
device for coupling the transmission shaft to the tool holder at
least in sections thereof.
[0009] The ring-shaped or ring-section-shaped suction channel
section is preferably a suction channel section which is arranged
downstream of the tool holder, and in particular directly after the
tool holder with respect to the direction of suction.
[0010] In particular, provision may be made for an axis of symmetry
of the substantially ring-shaped or ring-section-shaped suction
channel section to correspond at least approximately to a
rotational axis of an end of the transmission shaft towards the
tool holder.
[0011] An axis of symmetry of a substantially ring-section-shaped
suction channel section is preferably an axis of symmetry of a
complete ring which is obtained by completion of the
ring-section-shaped suction channel section.
[0012] Preferably, constant suction in the region of the tool
holder and in particular constant suction of abraded material from
the abrading process can be achieved by means of a substantially
ring-shaped or ring-section-shaped suction channel section which
surrounds the coupling device for coupling the transmission shaft
to the tool holder at least in sections thereof.
[0013] It can be expedient if the tool holder and an end of the
transmission shaft towards the tool holder, at least approximately,
have a common rotational axis.
[0014] The tool holder and an end of the transmission shaft towards
the tool holder are preferably connected to one another by means of
one or more gear units and in particular, by means of one or more
reduction gears.
[0015] The substantially ring-shaped or ring-section-shaped suction
channel section preferably surrounds the coupling device and in
particular, a gear unit for coupling the transmission shaft to the
tool holder at least in sections thereof and at least approximately
concentrically.
[0016] In one embodiment of the invention, provision is made for
the tool holder and an end of the transmission shaft towards the
tool holder to be connected to one another by means of a planetary
gear.
[0017] In particular, provision may be made for the coupling device
for coupling the transmission shaft to the tool holder to comprise
a planetary gear or be formed by a planetary gear.
[0018] In particular, a planetary gear is to be understood as being
an epicyclic gear which, in addition to shafts fixed to a frame,
also possesses shafts which orbit along circular paths in a frame.
The wheels rotating on the revolving shafts themselves circle a
central wheel in similar manner to the planets circling the
sun.
[0019] Preferably, a drive shaft of the coupling device is aligned
with an output shaft of the coupling device.
[0020] In one embodiment of the invention, provision is made for
the substantially ring-shaped or ring-section-shaped suction
channel section of the suction channel of the suction device, the
tool holder, an end of the transmission shaft towards the tool
holder, and/or a hood device for covering the tool holder to be
arranged such that they are substantially mutually coaxial.
[0021] Preferably, the substantially ring-shaped or
ring-section-shaped suction channel section of the suction channel
of the suction device, the tool holder, an end of the transmission
shaft towards the tool holder and/or a hood device for covering the
tool holder are pivotal together relative to the holding device
about one or more pivotal axes by means of a swivel device.
[0022] The transmission shaft is preferably flexible at least in
sections thereof.
[0023] The tool head is preferably connected to the holding device
such as to be pivotal about one or more pivotal axes.
[0024] In particular, the tool head is connected to the holding
device such as to be pivotal about one or more pivotal axes by
means of a swivel device.
[0025] It can be advantageous if an end of the transmission shaft
towards the tool holder is pivotal together with the tool head
about one or more pivotal axes, and in particular, is pivotal about
one or more pivotal axes by means of the swivel device.
[0026] In particular, provision may be made for an end of the
transmission shaft towards the tool holder and the tool holder to
have a common rotational axis in each pivotal position.
[0027] In one embodiment of the invention, provision is made for
the handheld abrading machine to comprise two or more gear units,
in particular, reduction gears for coupling the drive motor to the
tool holder.
[0028] Preferably, both an end of the transmission shaft towards
the drive motor and an end of the transmission shaft towards the
tool holder are each provided with at least one gear unit.
[0029] It can be expedient if a suction channel of a suction device
of the handheld abrading machine and the transmission shaft run
together at least in sections thereof in a tubing element of the
handheld abrading machine and in particular, in the tubular bar of
the holding device.
[0030] As an alternative or in addition thereto, provision may be
made for the handheld abrading machine to comprise at least two
tubing elements, wherein one of the tubing elements is the tubular
bar in which the transmission shaft runs at least in sections
thereof, and wherein a further tubing element forms a suction
channel section of the suction channel of the suction device. The
tubing elements are preferably arranged such that they are
substantially parallel to each other.
[0031] At least one tubing element is preferably rigid, bending
resistant, inflexible and/or stiff.
[0032] Preferably, the tubular bar is rigid, bending resistant,
inflexible and/or stiff.
[0033] A tubing element can be one-piece. Furthermore, provision
may be made for a tubing element to consist of two parts and in
particular, to be telescopic.
[0034] The substantially ring-shaped or ring-section-shaped suction
channel section of the suction channel of the suction device is
preferably connected in space-fixed manner to the coupling device
and in particular to a gear unit by means of which the tool holder
and an end of the transmission shaft towards the tool holder are
coupled to one another.
[0035] In particular, provision may be made for the substantially
ring-shaped or ring-section-shaped suction channel section and the
coupling device to be arranged together in a common housing.
[0036] The housing may be formed by one or more injection molded
components for example.
[0037] It can be advantageous, if the substantially ring-shaped or
ring-section-shaped suction channel section and the coupling device
for coupling the transmission shaft to the tool holder are fixed in
a common housing.
[0038] Thereby, the substantially ring-shaped or
ring-section-shaped suction channel section can be fanned by a
separate device for example.
[0039] As an alternative thereto, provision may be made for the
substantially ring-shaped or ring-section-shaped suction channel
section to be formed at least in sections thereof by the housing of
the coupling device.
[0040] Preferably, a housing for accommodating the coupling device
for coupling the transmission shaft to the tool holder fauns the
substantially ring-shaped or ring-section-shaped suction channel
section.
[0041] The housing and the holding device are preferably connected
to one another in pivotal manner by means of at least one swivel
element. In particular, provision may be made for the housing to be
connected to the holding device such as to be pivotal about one or
more pivotal axes by means of at least one swivel element.
[0042] The substantially ring-shaped or ring-section-shaped suction
channel section is arranged on the tool head. In particular, the
substantially ring-shaped or ring-section-shaped suction channel
section is a component of the tool head.
[0043] The substantially ring-shaped or ring-section-shaped suction
channel section of the suction channel and a suction channel
section of the suction channel running within a tubular bar of the
holding device or within a separate tubing element are preferably
connected to one another in fluid-conveying manner by means of a
flexible suction channel section of the suction channel.
[0044] The substantially ring-shaped or ring-section-shaped suction
channel section preferably adjoins a transition section on which
the flexible suction channel section and in particular a
substantially tubular flexible suction channel section is
preferably arranged.
[0045] The flexible suction channel section is preferably formed by
a flexible tubing element.
[0046] The transmission shaft preferably runs at least in sections
thereof within a flexible tubing element which comprises and/or
forms the flexible suction channel section.
[0047] In one embodiment of the invention, provision is made for
the tool holder to be selectively couplable to the transmission
shaft or removable and in particular detachable from the
transmission shaft by means of the coupling device.
[0048] A rotational axis (axis of rotation) of the tool holder
and/or an end of the transmission shaft towards the tool holder is
preferably substantially perpendicular to one or more pivotal axes
of the tool head.
[0049] It can be expedient if a rotational axis (axis of rotation)
of an end of the transmission shaft towards the tool holder and one
or more pivotal axes of the tool head intersect especially in each
position of the tool head.
[0050] A tool accommodated in the tool holder is preferably
drivable in rotary, oscillatory and/or eccentric manner.
[0051] For the purposes of attaching the tool to the tool holder,
provision is preferably made for a releasable connection, in
particular, by means of a hook and loop fastener.
[0052] The tool such as an abrading element for example is
preferably fixable to the tool holder in releasable manner.
[0053] It can be expedient if the tool head comprises a hood device
for covering the tool holder.
[0054] The hood device preferably comprises a hood element.
[0055] It can be expedient if the hood element has a hood chamber
and in particular a substantially cylindrical hood chamber.
[0056] The tool holder and/or a tool arranged in the tool holder
are preferably arrangeable in the hood chamber at least in sections
thereof.
[0057] In particular, provision may be made for the tool holder
together with a tool arranged thereon to be arrangeable in the hood
chamber at least in sections thereof.
[0058] In one embodiment of the invention, provision is made for
the hood element to comprise a recess and in particular, a recess
in the form of a segment of a cylinder.
[0059] A tangent touching an edge of the tool arranged in the tool
holder preferably runs substantially in a plane delimiting the
recess and in particular, the recess in the form of a segment of a
cylinder.
[0060] The recess-delimiting plane preferably runs substantially
parallel to a rotational axis of the tool holder and the tool
arranged thereon.
[0061] Preferably, edge regions and in particular edge regions of
walls, floors or ceilings which would not be accessible when using
hood elements that completely surround the tool holder can also be
treated by means of the handheld abrading machine due to a recess
in the hood element.
[0062] Thus in particular, a simple and efficient as well as
maximally fatigue-free abrading process is possible due to such a
hood element particularly one having a recess in the form of a
segment of a cylinder.
[0063] The tool holder, the transmission shaft and the hood element
are preferably arranged on a central element of the tool head in
rotatable manner.
[0064] In particular, provision may be made for the tool holder, an
end of the transmission shaft towards the tool holder and the hood
element to be arranged on a central element of the tool head such
as to be rotatable about at least approximately mutually parallel
rotational axes and in particular about a common rotational
axis.
[0065] It can be expedient if an axis of symmetry of the
substantially cylindrical hood chamber (cylinder axis) is at least
approximately identical to the rotational axis of the tool
holder.
[0066] A central element of the tool head is preferably connected
to the holding device such as to be pivotal about one or more
pivotal axes.
[0067] A central element of the tool head is preferably a housing
for a coupling device for coupling the transmission shaft to the
tool holder.
[0068] The central element and in particular the housing preferably
serves for accommodating a substantially tubular suction channel
section of a suction channel of a suction device.
[0069] Provision may be made for a substantially ring-shaped or
ring-section-shaped suction channel section of a suction channel of
a suction device to be formed by the central element and in
particular by the housing.
[0070] The hood device preferably comprises a braking device by
means of which an unwanted rotational movement of the hood element
is brakable. The braking device may comprise a spring device for
example.
[0071] It can be expedient if the hood device comprises a cover
element by means of which the recess and in particular the recess
in the form of a segment of a cylinder is coverable in the hood
element.
[0072] The suction of abraded material resulting from the abrading
action of the abrading machine can preferably be simplified by the
use of a cover element. In particular, abraded material developing
during the abrading action of the abrading machine can preferably
be prevented from escaping from the hood chamber through the recess
by the use of a cover element.
[0073] The cover element is preferably moveable into a covering
position in which the recess and in particular the recess in the
form of a segment of a cylinder is covered, and into an open
position in which the hood chamber is accessible through the
recess. In this way, the hood device can be set selectively into an
operating mode for abrading large surface areas (cover element in
the covering position) or into an operating mode for abrading close
to edges (cover element in the open position).
[0074] The cover element can, for example, be arranged on the hood
element in rotatable, pivotal, hinged and/or releasable manner.. In
this way, the cover element can be transferred from the covering
position into the open position and/or from the open position into
the covering position in a particularly simple manner.
[0075] In particular, provision may be made for the cover element
to be rotatable or pivotal about a (pivotal) axis that is oriented
at least approximately perpendicularly to the rotational axis of
the tool holder.
[0076] As an alternative thereto, provision may be made for the
cover element to be rotatable or pivotal about a (rotational) axis
that is oriented at least approximately parallel to the rotational
axis of the tool holder.
[0077] In particular, provision may be made for the cover element,
the tool holder, an end of the transmission shaft towards the tool
holder and/or the hood element to be rotatable about a common
rotational axis.
[0078] The cover element, the tool holder, an end of the
transmission shaft towards the tool holder and/or the hood element
are preferably arranged on a central element of the tool head.
[0079] It can be advantageous if the hood element comprises a
sealing device, in particular, a brush device.
[0080] The sealing device preferably serves to allow the hood
element to be placed gently on a surface that is to be treated by
means of the abrading machine. In particular thereby, the hood
chamber can be sealed with respect to the environment in order to
enable the abraded material resulting from the abrading action of
the abrading machine to be deliberately sucked away.
[0081] The sealing device is preferably formed and/or arranged to
be resilient or spring-mounted. Thereby, the hood element can
preferably be placed on a surface that is to be treated in gently
and reliably sealing manner.
[0082] The sealing device and in particular the brush device
preferably extends along the periphery of the cylindrical hood
chamber.
[0083] In particular, provision may be made for the sealing device
to extend along the periphery of the cylindrical hood chamber at
least approximately from one side of the recess and in particular
the recess in the form of a segment of a cylinder up to the side of
the recess and in particular the recess in the form of a segment of
a cylinder which is located opposite said one side.
[0084] It can be expedient if the cover element comprises a sealing
device such as a brush device for example.
[0085] The sealing device and in particular the brush device of the
hood element can preferably be expanded into a sealing device and
in particular a brush device which substantially completely
surrounds the hood chamber in ring-like manner by means of the
sealing device and in particular the brush device of the cover
element.
[0086] Preferably, the sealing device is arranged on the cover
element in such a way that, in a covering position of the cover
element, the sealing device of the hood element and the sealing
device of the cover element form a sealing ring, particularly a
brush collar, which at least approximately completely surrounds the
hood chamber and in particular the cylindrical hood chamber in
annular manner.
[0087] The hood device preferably comprises one or more contact
sections, the surfaces of which faun a contact surface for the
lateral placement of the tool head.
[0088] The contact surface preferably runs at least approximately
in the plane which delimits the recess and in particular, the
recess in the form of a segment of a cylinder.
[0089] In particular, the tool head can be placed laterally on a
wall, a floor and/or a ceiling by means of the contact surfaces. In
particular thereby, the edge regions of mutually adjoining walls,
floors and/or ceilings can be treated in a simple and efficient
manner.
[0090] The hood element may, for example, be formed in one-piece
manner with at least one contact section of the hood device.
[0091] Furthermore, provision may be made for the hood device to
comprise one or more separate contact elements which form one or
more contact sections of the hood device.
[0092] In a further embodiment of the invention, provision is made
for a motor shaft rotational axis of the drive motor to be oriented
transversely and in particular inclined relative to a longitudinal
axis of the tubular bar.
[0093] Due to such an orientation of the motor shaft rotational
axis relative to the longitudinal axis of the tubular bar, a center
of gravity of the handheld abrading machine can preferably be
purposefully adjusted, especially optimized. Thereby, a simple,
efficient and as fatigue-free an abrading action as possible can be
obtained.
[0094] The longitudinal axis of the tubular bar is preferably a
longitudinal axis, an axis of symmetry and/or a mid axis of a
central section of the tubular bar between the drive motor and the
tool head.
[0095] In particular thereby, a central section is a middle section
of the tubular bar in which a center of the tubular bar (taken with
respect to its longitudinal extent) is arranged.
[0096] Provision may be made for the longitudinal axis of the
tubular bar to be a longitudinal axis, an axis of symmetry and/or a
mid axis of a central linear section of the tubular bar between the
drive motor and the tool head.
[0097] Furthermore, the longitudinal axis of the tubular bar can
preferably be a longitudinal axis of an engagement region of the
tubular bar which is gripped by a user when the abrading machine is
effecting an abrading action.
[0098] It can be expedient if a center of gravity of the drive
motor and a center of gravity of the tool head are arranged on
mutually opposite sides of the longitudinal axis of the tubular
bar.
[0099] Preferably, a distinction can be made between a motor side
on which the drive motor is located and a tool side on which the
tool is arranged, taken with respect to the longitudinal axis of
the tubular bar.
[0100] In particular, provision may be made for the center of
gravity of the handheld abrading machine to be arranged in the
proximity of the central section, in particular the middle section,
of the tubular bar or within the tubular bar, in particular within
the central section, such as the e.g. middle section, of the
tubular bar.
[0101] The tubular bar preferably comprises one or more guide
elements for the guidance of the transmission shaft and in
particular for the guidance of the transmission shaft within the
tubular bar.
[0102] A guide element can be in the form of a guide channel or a
guide ring for example.
[0103] In one embodiment of the invention, provision is made for
the transmission shaft to be flexible at least in sections
thereof.
[0104] Preferably, the transmission shaft is bent or curved at
least in sections thereof within the tubular bar particularly in a
substantially linear section of the tubular bar.
[0105] It can be expedient if the transmission shaft is fed into
the tubular bar at the proximal end of the tubular bar in a
direction running transversely and in particular inclined relative
to the longitudinal axis of the tubular bar.
[0106] Furthermore, provision may be made for the transmission
shaft to be fed into the tubular bar at the proximal end of the
tubular bar substantially parallel to an axis of symmetry of the
proximal end of the tubular bar.
[0107] The proximal end of the tubular bar and/or the distal end of
the tubular bar preferably comprises at least one bend.
[0108] It can also be expedient however, if the tubular bar is
entirely linear, i.e. if the tubular bar has a linear axis of
symmetry.
[0109] It can be expedient if the transmission shaft is fed out of
the tubular bar at the distal end of the tubular bar in a direction
running transversely and in particular inclined relative to the
longitudinal axis of the tubular bar.
[0110] Furthermore, provision may be made for the transmission
shaft to be fed out of the tubular bar at the distal end of the
tubular bar substantially parallel to an axis of symmetry of the
distal end of the tubular bar.
[0111] In one embodiment of the invention, provision is made for
the motor shaft rotational axis and a rotational axis of the end of
the transmission shaft towards the drive motor to be mutually
offset.
[0112] The drive motor and the transmission shaft are preferably
connected to one another by means of an offsetting device with the
aid of which a rotational movement of a motor shaft of the drive
motor is transferable to an end of the transmission shaft towards
the drive motor that is offset relative to the motor shaft.
[0113] The offsetting device can, for example, be a gear unit and
in particular a reduction gear.
[0114] It can be expedient if an opening is provided at an end of
the tubular bar which preferably forms a base area of the tubular
bar through which the transmission shaft is fed into an interior
space of the tubular bar or is fed out of the interior space of the
tubular bar.
[0115] As an alternative or in addition thereto, provision may be
made for the tubular bar to comprise one or more through-openings
which differ from openings at the ends of the tubular bar and in
particular openings which form a base area of the tubular bar.
[0116] Preferably, the transmission shaft is fed into an interior
space of the tubular bar through such a through-opening.
[0117] As an alternative or in addition thereto, provision may be
made for the transmission shaft to be fed out of the interior space
of the tubular bar through such a through-opening.
[0118] It can be expedient if an opening is provided at an end of
the tubular bar which preferably forms a base area of the tubular
bar, whereby an interior space of the tubular bar serving as a
suction channel section of a suction channel of a suction device is
connected via the opening to the tool head in fluid-conveying
manner by means of at least one further suction channel
section.
[0119] In particular, provision may be made for both openings at
the ends of the tubular bar which form the base area of the tubular
bar to connect an interior space of the tubular bar serving as a
suction channel section of the suction channel of the suction
device to further suction channel sections of the suction channel
of the suction device in fluid-conveying manner.
[0120] As an alternative or in addition thereto, provision may be
made for the tubular bar to comprise a through-opening which
differs from openings at the ends of the tubular bar and by means
of which an interior space of the tubular bar serving as a suction
channel section of a suction channel of a suction device is
connected to at least one further suction channel section of the
suction channel of the suction device in fluid-conveying
manner.
[0121] In one embodiment of the invention, provision is made for
the tubular bar to comprise an engagement region which is gripped
by a user when the abrading machine is effecting an abrading
action.
[0122] A center of gravity of the drive motor and a center of
gravity of the tool head are preferably arranged on mutually
opposite sides of a longitudinal axis of the tubular bar and in
particular, respectively on a motor side and on a tool side.
[0123] The handheld abrading machine thereby preferably has a
balanced weight distribution so that a simple, efficient and as
fatigue-free an abrading action as possible is obtained.
[0124] It can be advantageous if a motor shaft rotational axis of
the drive motor is oriented substantially parallel to the
longitudinal axis of the tubular bar.
[0125] As an alternative thereto, provision may be made for a motor
shaft rotational axis of the drive motor to be oriented
transversely and in particular inclined relative to a longitudinal
axis of the tubular bar.
[0126] The motor shaft rotational axis is preferably offset
relative to the longitudinal axis of the tubular bar.
[0127] In particular, an offset arrangement is to be understood as
a spaced, skewed or parallel arrangement.
[0128] The transmission shaft for the transmission of torque from
the drive motor to the tool holder is preferably flexible at least
in sections thereof.
[0129] The longitudinal axis of the tubular bar is preferably a
longitudinal axis of an engagement region of the tubular bar which
is gripped by a user when the abrading machine is effecting an
abrading action.
[0130] In particular thereby, the longitudinal axis of the tubular
bar is an axis of symmetry of the engagement region of the tubular
bar.
[0131] The engagement region of the tubular bar is preferably
arranged between the drive motor and the tool head.
[0132] A motor shaft of the drive motor and an end of the
transmission shaft towards the drive motor are preferably mutually
offset with respect to a direction running perpendicularly to the
longitudinal axis of the tubular bar and/or with respect to a
direction running parallel to the longitudinal axis of the tubular
bar.
[0133] In one embodiment of the invention, provision is made for a
motor shaft rotational axis, a rotational axis of an end of the
transmission shaft towards the drive motor and/or a rotational axis
of a section of the transmission shaft running in the engagement
region of the tubular bar to run at least approximately parallel to
each other.
[0134] Furthermore, provision may be made for a motor shaft
rotational axis, a rotational axis of an end of the transmission
shaft towards the drive motor and/or a rotational axis of a section
of the transmission shaft running in the engagement region of the
tubular bar to run transversely and in particular inclined relative
to each other.
[0135] In one embodiment of the invention, provision is made for a
motor shaft rotational axis, a rotational axis of an end of the
transmission shaft towards the drive motor and/or a rotational axis
of a section of the transmission shaft running in the engagement
region of the tubular bar to be mutually offset with respect to a
direction running perpendicularly to the longitudinal axis of the
tubular bar.
[0136] It can be expedient if the drive motor and the transmission
shaft are connected to one another by means of an offsetting
device.
[0137] Preferably, a rotational movement of a motor shaft of the
drive motor is transferable to an end of the transmission shaft
towards the drive motor that is offset relative to the motor shaft
by means of the offsetting device.
[0138] In particular, the offsetting device comprises a gear unit
such as a reduction gear for example.
[0139] In particular, provision may be made for the offsetting
device to comprise a gear wheel device for the transmission of the
rotational movement.
[0140] Furthermore, provision may be made for the offsetting device
to comprise a toothed belt device for the transmission of the
rotational movement.
[0141] It can be expedient if a motor shaft of the drive motor and
an end of the transmission shaft towards the drive motor are at
least approximately mutually coaxial.
[0142] The motor shaft of the drive motor and an end of the
transmission shaft towards the drive motor preferably have a common
rotational axis.
[0143] A motor shaft of the drive motor and a section of the
transmission shaft running in the engagement region of the tubular
bar are preferably mutually offset with respect to a direction
running perpendicularly to the longitudinal axis of the tubular
bar.
[0144] The motor shaft of the drive motor and a section of the
transmission shaft running in the engagement region of the tubular
bar are preferably connected to one another by means of a flexible
section of the transmission shaft.
[0145] In particular, the flexible section fix is an offsetting
device for the transmission of the rotational movement of the motor
shaft of the drive motor to the section of the transmission shaft
running in the engagement region of the tubular bar.
[0146] In one embodiment of the invention, provision may be made
for the spacing between the drive motor and the tool head to be
adjustable and in particular continuously adjustable.
[0147] To this end, the abrading machine may comprise a telescopic
device.
[0148] The tubular bar connecting the drive motor to the tool head
and/or further e.g. tubular elements for connecting the drive motor
to the tool head are preferably telescopic.
[0149] For example, provision may be made for the tubular bar
and/or the further tubular elements and in particular tubing
elements as well as the transmission shaft to be formed of at least
two parts, whereby in particular, the two parts are displaceable on
one another with respect to the longitudinal direction.
[0150] The two parts of the transmission shaft are preferably
connected to one another with positive engagement with respect to
at least one direction running perpendicularly to the longitudinal
axis of the tubular bar so that a rotational movement can be
transferred by means of the transmission shaft.
[0151] The abrading machine and in particular the holding device of
the abrading machine, can preferably comprise a handle element. The
abrading machine is thereby particularly easy and comfortable to
handle.
[0152] An interior space of the tubular bar can, for example, be
formed in two-parts and in particular split along the longitudinal
axis.
[0153] An interior space part of the interior space of the tubular
bar preferably forms a suction channel section of a suction channel
of a suction device.
[0154] A further interior space part of the interior space of the
tubular bar preferably serves for accommodating and/or guiding the
transmission shaft.
[0155] The tool holder of the tool head is preferably removable
from the tool head and in particular from the coupling device, and
is exchangeable for a tool holder of the same type or of another
type, for example, ones having a different shape, different
diameter and/or a different type of movement (e.g. rotatory or
oscillatory).
[0156] A hood device for covering the tool holder preferably
comprises a hood element which is formed in one piece manner and
surrounds the substantially cylindrical hood chamber.
[0157] A braking device for preventing an unwanted rotation of the
hood device relative to a central element on which the hood element
is preferably rotatable may, for example, comprise a clamping
device and/or a device for connecting the relatively rotatable
components in frictional manner.
[0158] With respect to a position of the handheld abrading machine
in which the tool head together with the tool holder or a tool
accommodated in the tool holder rests upon a floor, the drive motor
is preferably arranged above the tubular bar.
[0159] However, provision could also be made for the drive motor to
be arranged underneath the tubular bar and in particular,
underneath the tubular bar in the vicinity of or after one or more
bends of the tubular bar.
[0160] Furthermore, provision may be made for the drive motor to
directly follow an end of the tubular bar. In particular hereby,
provision may be made for the motor shaft rotational axis to be at
least approximately identical to an axis of symmetry of an end of
the tubular bar towards the drive motor.
[0161] A center of gravity of the handheld abrading machine is
preferably arranged within the tubular bar and in particular as
closely as possible to the longitudinal axis, the mid axis and/or
the axis of symmetry of the tubular bar. The occurrence of moments
affecting the rotational movement even during rotation of the
handheld abrading machine about the longitudinal axis of the
tubular bar can be reduced thereby or completely prevented.
[0162] Preferably, the abrading machine has two gear units and in
particular two reduction gears which are arranged at the proximal
end and/or at the distal end of the tubular bar and/or on the tool
head.
[0163] The center of gravity of the drive motor preferably lies at
least approximately 30 mm and in particular at least approximately
50 mm, approximately 55 mm for example, above, i.e. remote from the
tool head, the longitudinal axis of the tubular bar.
[0164] The motor shaft rotational axis preferably includes an angle
of at least approximately 5.degree. and in particular at least
approximately 10.degree., approximately 12.degree. for example with
the longitudinal axis of the tubular bar. Furthermore, the motor
shaft rotational axis includes an angle of at most approximately
45.degree. and in particular of at most approximately 30.degree.
with the longitudinal axis of the tubular bar.
[0165] All of the previously described features as well as the
features described hereinafter in connection with the exemplary
embodiments can make a contribution to a simple, efficient and as
fatigue-free an abrading process as possible by means of the
handheld abrading machine and are therefore combinable with one
another as desired for producing advantageous embodiments of the
invention.
[0166] Further preferred features and/or advantages of the
invention faun the subject matter of the following description and
the graphical illustration of exemplary embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0167] FIG. 1 shows a schematic perspective illustration of a first
embodiment of a handheld abrading machine;
[0168] FIG. 2 a schematic side view of a tool head of the abrading
machine depicted in FIG. 1;
[0169] FIG. 3 a vertical longitudinal section through the tool head
of the abrading machine depicted in FIG. 1;
[0170] FIG. 4 an enlarged illustration of a coupling device of the
tool head depicted in FIG. 3;
[0171] FIG. 5 a schematic horizontal section through the tool head
along the line 5-5 in FIG. 4;
[0172] FIG. 6 a schematic, partly sectional side view of the
abrading machine depicted in FIG. 1 in a completely pushed-in
position of the abrading machine;
[0173] FIG. 7 an enlarged illustration of the region VII in FIG.
6;
[0174] FIG. 8 a schematic side view corresponding to FIG. 6 of the
abrading machine depicted in FIG. 1 in a completely drawn-out
position thereof;
[0175] FIG. 9 an enlarged illustration of the region IX in FIG.
8;
[0176] FIG. 10 a schematic side view of a tool head of a second
embodiment of an abrading machine in which a hood device
incorporating a recess in the form of a segment of a cylinder is
provided;
[0177] FIG. 11 a schematic plan view of the tool head depicted in
FIG. 10;
[0178] FIG. 12 a schematic perspective illustration of the tool
head depicted in FIG. 10;
[0179] FIG. 13 a schematic side view corresponding to FIG. 10 of a
tool head of a third embodiment of an abrading machine in which the
hood device comprises a cover element for covering the recess,
wherein the cover element is arranged in a covering position;
[0180] FIG. 14 a schematic illustration corresponding to FIG. 11 of
the tool head depicted in FIG. 13;
[0181] FIG. 15 a schematic perspective illustration corresponding
to FIG. 12 of the tool head depicted in FIG. 13;
[0182] FIG. 16 a schematic illustration corresponding to FIG. 13 of
the tool head depicted in FIG. 13, wherein the cover element is
arranged in an open position;
[0183] FIG. 17 a schematic illustration corresponding to FIG. 14 of
the tool head depicted in FIG. 16;
[0184] FIG. 18 a schematic perspective illustration corresponding
to FIG. 15 of the tool head depicted in FIG. 16;
[0185] FIG. 19 a schematic side view corresponding to FIG. 13 of a
tool head of a fourth embodiment of an abrading machine in which,
in place of a hinged cover element, a rotatable cover element is
arranged in a covering position;
[0186] FIG. 20 a schematic illustration corresponding to FIG. 14 of
the tool head depicted in FIG. 19;
[0187] FIG. 21 a schematic perspective illustration corresponding
to FIG. 15 of the tool head depicted in FIG. 19;
[0188] FIG. 22 a schematic side view corresponding to FIG. 19 of
the tool head of the fourth embodiment of the abrading machine,
wherein the cover element is arranged in an open position;
[0189] FIG. 23 a schematic plan view corresponding to FIG. 20 of
the tool head depicted in FIG. 22;
[0190] FIG. 24 a schematic perspective illustration corresponding
to FIG. 21 of the tool head depicted in FIG. 22;
[0191] FIG. 25 a partly sectional side view corresponding to FIG. 6
of a fifth embodiment of an abrading machine in which an offsetting
device is provided between a drive motor and a transmission shaft
of the abrading machine, wherein the offsetting device comprises a
toothed belt device;
[0192] FIG. 26 an enlarged illustration of the region XXVI depicted
in FIG. 25;
[0193] FIG. 27 a partly sectional side view corresponding to FIG. 6
of a sixth embodiment of an abrading machine in which an offsetting
device in the form of a gear wheel device is provided;
[0194] FIG. 28 a schematic plan view of the abrading machine in
accordance with FIG. 27;
[0195] FIG. 29 an enlarged illustration of the region XXIX in FIG.
27;
[0196] FIG. 30 a partly sectional side view corresponding to FIG. 6
of a seventh embodiment of an abrading machine in which a
telescopic arrangement is not provided;
[0197] FIG. 31 an enlarged illustration of the region XXXI in FIG.
30;
[0198] FIG. 32 a partly sectional side view corresponding to FIG. 6
of an eighth embodiment of an abrading machine in which a motor
shaft rotational axis is oriented transversely to a longitudinal
axis of a tubular bar of the abrading machine;
[0199] FIG. 33 a vertical cross section through the tubular bar of
the abrading machine depicted in FIG. 32 along the line 33-33 in
FIG. 32;
[0200] FIG. 34 a vertical cross section through the tubular bar of
the abrading machine depicted in FIG. 32 along the line 34-34 in
FIG. 32,
[0201] FIG. 35 a vertical cross section through the tubular bar of
the abrading machine depicted in FIG. 32 along the line 35-35 in
FIG. 32;
[0202] FIG. 36 a schematic illustration of a section of a tubular
bar towards the drive motor and the drive motor of a ninth
embodiment of an abrading machine, wherein the drive motor is
arranged underneath the tubular bar and the tubular bar
incorporates two bends;
[0203] FIG. 37 a schematic illustration corresponding to FIG. 36 of
a tenth embodiment of an abrading machine, wherein the drive motor
joins an end of the tubular bar and the tubular bar incorporates a
bend;
[0204] FIG. 38 a schematic illustration corresponding to FIG. 36 of
an eleventh embodiment of an abrading machine, wherein the drive
motor is arranged above the tubular bar and an offsetting device in
the form of a flexible transmission shaft is provided;
[0205] FIG. 39 a partly sectional side view corresponding to FIG. 6
of a twelfth embodiment of an abrading machine, wherein a motor
shaft rotational axis of the drive motor of the abrading machine,
an axis of symmetry of an end of the tubular bar towards the drive
motor and a longitudinal axis of the tubular bar are oriented
transversely of each other and the tubular bar extends at least
approximately linearly from the drive motor to a flexible tubing
element which connects the tubular bar to the tool head; and
[0206] FIG. 40 a partly sectional side view corresponding to FIG.
39 of a thirteenth embodiment of an abrading machine in which the
connecting elements between the drive motor and the tool head
incorporate at least one bend before and after a central section of
the tubular bar taken with respect to a longitudinal axis of the
tubular bar.
[0207] Similar or functionally equivalent elements are provided
with the same reference symbols in all the Figures.
DETAILED DESCRIPTION OF THE DRAWINGS
[0208] A first embodiment of a handheld abrading machine bearing
the general reference 100 which is illustrated in FIGS. 1 to 9
comprises a holding device 102 for holding the abrading machine
100, a drive motor 104 for driving a tool 106 and a tool head 108
for holding the tool 106.
[0209] The drive motor 104 and the tool head 108 are connected to
one another by means of a tubular bar 110.
[0210] The tubular bar 110 comprises at least one tubing element
112.
[0211] The tubular bar 110 is rigid and inflexible.
[0212] The drive motor 104 is arranged at a proximal end 114 of the
tubular bar 110.
[0213] The tool head 108 is arranged at a distal end 116 of the
tubular bar 110.
[0214] The drive motor 104 is preferably arranged directly at the
proximal end 114 of the tubular bar 110, being fixed to the tubular
bar 110 by means of a housing 210 of the drive motor 104 for
example.
[0215] A swivel device 118 is provided for the purposes of
arranging the tool head 108 at the distal end 116 of the tubular
bar 110.
[0216] The tool head 108 is pivotal relative to the tubular bar 110
by means of the swivel device 118.
[0217] In particular, the tool head 108 is pivotal relative to the
holding device 102 of the handheld abrading machine 100 about one
or more, in particular two, pivotal axes 120.
[0218] To this end, the swivel device 118 comprises at least one
swivel element 122.
[0219] In particular, the swivel device 118 comprises a swivel
element 122 in the form of a swivel fork 124.
[0220] Furthermore, the swivel device 118 comprises a swivel
element 122 in the form of a swivel ring 126.
[0221] The swivel fork 124 is preferably arranged on an attachment
arm 129 of the holding device 102 by means of an attachment element
128 in rotatable or, alternatively, in mutually non-rotatable
manner.
[0222] In particular, the attachment arm 129 is connected to the
tubular bar 110.
[0223] The swivel fork 124 and thus too the tool head 108 that is
held by means of the swivel fork 124 are pivotal relative to the
attachment arm 129 about a first pivotal axis 120a.
[0224] Furthermore, the tool head 108 is pivotal about a second
pivotal axis 120b which is oriented perpendicularly to the first
pivotal axis 120a by means of the swivel fork 124 and the swivel
ring 126.
[0225] The first pivotal axis 120a and the second pivotal axis 120b
preferably intersect, but could also be mutually offset for
example.
[0226] The handheld abrading machine 100 comprises a transmission
shaft 130 by means of which a rotational movement of the drive
motor 104 is transferable to a tool holder 132 for holding the tool
106.
[0227] In particular, torque is transferable from the drive motor
104 to the tool holder 132 and the tool 106 arranged thereon by
means of the transmission shaft 130.
[0228] The transmission shaft 130 runs at least in sections thereof
within the tubular bar 110.
[0229] Preferably, the transmission shaft 130 is guided within the
tubular bar 110. To this end, provision may be made for (yet to be
described) guide elements 270.
[0230] As can be derived in particular from FIGS. 2 and 3, the tool
head 108 comprises a central element 134 which is gripped by the
swivel device 118.
[0231] In particular, the central element 134 is a housing 136 for
a coupling device 138 that is used for coupling the transmission
shaft 130 to the tool holder 132.
[0232] The coupling device 138 comprises a gear unit 140 and in
particular, a planetary gear 142.
[0233] An end 144 of the transmission shaft 130 towards the tool
holder 132 forms a drive shaft 146 of the coupling device 138 or is
connected in line therewith to a drive shaft 146 of the coupling
device 138.
[0234] A tool holder shaft 148, such as a releasable connecting
device 150 for connecting the tool holder 132 to the coupling
device 138 in releasable manner, forms an output shaft 152 of the
coupling device 138 or is connected to such an output shaft 152
aligned therewith.
[0235] Due in particular to the construction of the gear unit 140
in the form of a planetary gear 142, the drive shaft 146 and the
output shaft 152 have an at least approximately common rotational
axis 154.
[0236] Thus too, the end 144 of the transmission shaft 130 towards
the tool holder 132 and the tool holder 132 have a common
rotational axis 154.
[0237] Smooth and low-vibratory operation of the abrading machine
100 can be achieved due to this common rotational axis 154.
[0238] As can be derived in particular from FIG. 5, the planetary
gear 142 comprises a central wheel 143 which is also referred to as
a sun wheel, an outer wheel 145 which is also referred to as a
crown wheel, and a plurality such as three for example, of planet
wheels 147. The planet wheels 147 are rotatable on a planet wheel
carrier 149.
[0239] The drive shaft 146 engages with the central wheel 143 for
example.
[0240] The output shaft 152 engages with the planet wheel carrier
149 for example.
[0241] The outer wheel 145 is connected to the housing 136 in
mutually non-rotatable manner for example.
[0242] In alternative embodiments, provision may be made for the
drive shaft 146 to engage with the planet wheel carrier 149 or the
outer wheel 145. The output shaft 152 then engages with the central
wheel 143 or the planet wheel carrier 149 for example, whilst the
outer wheel 145 or the central wheel 143 is connected to the
housing 136 in mutually non-rotatable manner.
[0243] As can be derived from FIG. 3 furthermore, the tool head 108
also comprises a hood device 156.
[0244] The hood device 156 covers the tool holder 132.
[0245] To this end in particular, the hood device 156 comprises a
hood element 158 which surrounds a hood chamber 160.
[0246] The hood chamber 160 is substantially cylindrical whereby a
diameter of the hood chamber 160 is a multiple of the height of the
hood chamber 160.
[0247] Furthermore, the hood device 156 comprises a sealing device
161 and in particular a brush device 162 which extends along a
peripheral direction 164 of the hood chamber 160 and forms a
sealing ring 165 and in particular a ring-shaped brush collar
166.
[0248] The hood element 158, the hood chamber 160, the sealing
device 161 and the tool holder 132 preferably have a common
rotational axis 154.
[0249] In particular thereby, the rotational axis 154 is an axis of
symmetry 168 of the hood element 158, the hood chamber 160, the
sealing device 161 and the tool holder 132.
[0250] Due to the arrangement of the tool holder 132 and the tool
106 in the hood chamber 160, abraded material occurring when the
abrading machine 100 is operating can be kept within the tool head
108. In particular, the sealing device 161 can be placed on a
surface that is to be treated so that a substantially closed hood
chamber 160 is formed by means of the hood element 158 and the
surface. Contamination of the environment of the abrading machine
100 can thereby be prevented.
[0251] In order to enable the abraded material resulting from the
abrading action of the abrading machine 100 to be removed from the
tool head 108, there is provided, in particular, a suction device
170.
[0252] The suction device 170 comprises a suction channel 172 which
connects the hood chamber 160 in fluid-conveying manner to a (not
illustrated) suction device such as a vacuum cleaner for example
that is connectable to a connector device 174 of the abrading
machine 100.
[0253] The suction channel 172 comprises a plurality of suction
channel sections 176.
[0254] In particular, the suction channel 172 has a substantially
ring-shaped or ring-section-shaped suction channel 176a, a flexible
suction channel section 176b and a tubular suction channel section
176c.
[0255] The substantially ring-shaped or ring-section-shaped suction
channel section 176a (see in particular FIGS. 3 and 4) surrounds at
least in sections thereof the coupling device 138 in substantially
annular manner.
[0256] In particular, the ring-shaped or ring-section-shaped
suction channel section 176a and the coupling device 138 have an at
least approximately common axis of symmetry 168.
[0257] The abraded material collecting in the hood chamber 160 as a
result of the abrading action of the abrading machine 100 can be
removed in a particularly constant and reliable manner from the
hood chamber 160 by means of the ring-shaped or ring-section-shaped
suction channel section 176a.
[0258] The ring-shaped or ring-section-shaped suction channel
section 176a is connected to the flexible suction channel section
176b in fluid-conveying manner by means of a transition section
178.
[0259] Both the ring-shaped or ring-section-shaped suction channel
section 176a and the transition section 178 are formed by a
suitable shaping of the housing 136 of the tool head 108.
[0260] A flexible tubing element 180 which comprises or forms the
flexible suction channel section 176b is arranged on the transition
section 178. The flexible tubing element 180 connects the housing
136 to the tubular bar 110.
[0261] As can be derived in particular from FIGS. 6 and 7,
provision is made in the first embodiment of the handheld abrading
machine 100 that is illustrated in FIGS. 1 to 9 for the drive motor
104 and the tool head 108 to be connected to one another by means
of two tubing elements 112 which run in parallel with each
other.
[0262] A tubing element 112 forming the tubular bar 110, in which
the transmission shaft 130 runs, joins the flexible suction channel
section 176b and ends in the vicinity of the drive motor 104.
[0263] The further tubing element 112 which is arranged in parallel
with and is offset relative to the tubular bar 110 is connected in
fluid-conveying manner to the flexible tubing element 180 fainting
the flexible suction channel section 176b by means of a fork-piece
182.
[0264] Commencing from the fork-piece 182, the further tubing
element 112 extends underneath and then past the drive motor 104 up
to the connector device 174.
[0265] Thus, in the case of the first embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 1 to 9, separate
tubing elements 112 are provided for accommodating the transmission
shaft 130 and for the tubular suction channel section 176c.
[0266] However, the transmission shaft 130 runs in sections thereof
within the suction channel 172 particularly in the flexible tubing
element 180.
[0267] As can be derived in particular from FIGS. 6 to 9, the
handheld abrading machine 100 in the first embodiment that is
illustrated in FIGS. 1 to 9 comprises a telescopic device 184 by
means of which the spacing of the drive motor 104 from the tool
head 108 is adjustable.
[0268] In particular, a working range attainable in operation of
the abrading machine 100 can be established thereby.
[0269] The telescopic device 184 is formed in that the tubing
elements 112 which form the tubular bar 110 and the tubular suction
channel section 176c are in each case formed of two parts.
[0270] Thereby, the tubing elements 112 each comprise an outer part
186 and an inner part 188 whereby the outer part 186 and the inner
part of 188 are displaceable relative to each other.
[0271] The length of the tubing elements 112 can thereby be
varied.
[0272] Preferably, the transmission shaft 130 is also formed of at
least two parts wherein a first part 130a and a second part 130b
are likewise displaceable relative to each other.
[0273] The first part 130a and the second part 130b of the
transmission shaft 130 are connected to one another with positive
engagement in a direction oriented perpendicularly with respect to
an extension direction 190 of the telescopic device 184 in order to
enable torque to be transmitted.
[0274] The extension direction 190, a transmission shaft rotational
axis 192 of the transmission shaft 130 within the tubular bar 110
and in particular in an engagement region 208 of the tubular bar
110, a longitudinal axis 194 of the tubular bar 110, a mid axis 196
of the tubular bar 110 and/or an axis of symmetry 198 of the
tubular bar 110 are in parallel with each other.
[0275] In particular, the longitudinal axis 194, the mid axis 196
and the axis of symmetry 198 of the tubular bar 110 are
identical.
[0276] As can be derived in particular from FIGS. 7 and 9, the
drive motor 104 of the abrading machine 100 in accordance with the
first embodiment is arranged directly behind an end 200 of the
tubular bar 110 towards the drive motor 104, i.e. behind the
proximal end 114 of the tubular bar 110.
[0277] Thereby, the drive motor 104 is coupled to the transmission
shaft 130 by means of a gear unit 140 and in particular a planetary
gear 142.
[0278] A motor shaft rotational axis 202 of the drive motor 104 and
a transmission shaft rotational axis 192 within the tubular bar 110
are substantially identical thereby.
[0279] Commencing from the drive motor 104, the transmission shaft
130 is fed into the tubular bar 110 at the proximal end 114 of the
tubular bar 110 through an opening 283 in the tubular bar 110 which
forms a base area of the tubular bar 110, and/or is fed out of the
tubular bar 110 at the distal end 116 of the tubular bar 110
through an opening 283 in the tubular bar 110 which forms a base
area of the tubular bar 110.
[0280] The spacing of the drive motor 104 from the tool head 108 is
preferably continuously adjustable by means of the telescopic
device 184.
[0281] The abrading machine 100 comprises a locking device 204 for
locking the drive motor 104 relative to the tool head 108 and in
particular for establishing a desired length of the abrading
machine 100.
[0282] The locking device 204 can, for example, be in the form of a
latching device and/or a clamping device particularly in order to
fix the inner parts 188 and the outer parts 186 of the tubing
elements 112 relative to each other taken with respect to the
extension direction 190.
[0283] The previously described first embodiment of the handheld
abrading machine 100 functions as follows.
[0284] Before starting the abrading machine 100, a desired length
of the abrading machine 100 and therefore a desired spacing of the
drive motor 104 from the tool head 108 are set by means of the
telescopic device 184.
[0285] The tool head 108 is fixed at the desired spacing from the
drive motor 104 by means of the locking device 204.
[0286] A tool 106 is now arranged on the tool holder 132.
[0287] Thereby, the tool holder 132 and the tool 106 are connected
to one another by means of a hook and loop fastening for
example.
[0288] In order to start the abrading machine 100, a user grips the
abrading machine 100 by the holding device 102 and in particular,
by a handle element 206 and also by the engagement region 208 of
the abrading machine 100.
[0289] In particular, the handle element 206 is arranged on the
housing 210 for the drive motor 104.
[0290] The engagement region 208 is arranged, in particular, on the
tubular bar 110.
[0291] The handle element 206 and the engagement region 208 are
preferably arranged on mutually opposite sides of the drive motor
104.
[0292] If, now, the drive motor 104 is switched on, then a motor
shaft 212 of the drive motor 104 is set into rotational
movement.
[0293] The motor shaft 212 is coupled to the transmission shaft 130
and transfers the rotational movement by means of the transmission
shaft 130 to the tool holder 132 which is coupled to the
transmission shaft 130 by means of the coupling device 138.
[0294] The tool holder 132 and the tool 106 arranged thereon are
thus set into rotational movement.
[0295] The gear units 140, namely, the gear unit of the coupling
device 138 and the gear unit 140 arranged between the drive motor
104 and the transmission shaft 130 are reduction gears such as a
planetary gear 142 for example, and they reduce the number of
revolutions of the motor shaft 212 to a desired number of
revolutions of the tool holder 132 and thus of the tool 106.
[0296] An abrading action can be effected by means of the rotating
tool 106.
[0297] For this purpose, the abrading machine 100 together with the
tool 106 is placed on a surface that is to be treated such as a
wall, a floor or a ceiling for example.
[0298] The surface is abraded by the rotation of the tool 106.
[0299] Abraded material is produced thereby and this can heavily
contaminate the environment unless suitably exhausted.
[0300] In the case of the handheld abrading machine 100 in
accordance with FIGS. 1 to 9, the suction device 170 is provided
for the purposeful removal of the abraded material.
[0301] To this end, the abraded material resulting from the
treatment of the surface is held in the hood chamber 160 by means
of the sealing device 161 of the hood device 156 of the tool head
108. The abraded material is removed from the hood chamber 160 and
in particular, is sucked out via the suction channel 172 and
supplied to a suitable disposal facility.
[0302] In particular, the abraded material is removed continuously
from the hood chamber 160 by means of the ring-shaped or
ring-section-shaped suction channel section 176a.
[0303] Subsequently, the abraded material removed through the
ring-shaped or ring-section-shaped suction channel section 176a is
supplied via the transition section 178 to the flexible suction
channel section 176b, from there it is guided via the fork-piece
182 into the tubular suction channel section 176c, removed from the
abrading machine 100 via the connector device 174 and preferably
supplied to the (not illustrated) suction device.
[0304] Due to the use of the planetary gear 142, the abrading
machine 100 is particularly smooth running so that a simple,
efficient and as fatigue-free an abrading process as possible is
obtained.
[0305] A second embodiment of a handheld abrading machine 100 which
is illustrated in FIGS. 10 to 12 differs from the first embodiment
illustrated in FIGS. 1 to 9 mainly in that that the hood device 156
comprises a hood element 158 which has a recess 214.
[0306] The recess 214 is, in particular, substantially in the form
of a segment of a cylinder.
[0307] As can be derived in particular from FIGS. 11 and 12, a
plane 216 delimiting the recess 214 is oriented substantially
parallel to the rotational axis 154 of the tool holder 132.
[0308] Thereby, the plane 216 is arranged and the recess 214 is
thus dimensioned in such a way that a tangent 220 touching an edge
218 of the tool 106 runs at least approximately in the plane
116.
[0309] As follows in particular from a comparison of FIGS. 3 and
12, the recess 214 in the hood element 158 makes it possible for
the tool 106 to closely approach an edge region or corner region of
two walls for example.
[0310] Without such a recess 214, an edge region between two walls
would not be treatable by means of the abrading machine 100.
Rathermore, for this purpose, a separate treatment would have to be
carried out in this edge region by hand or by means of another
abrading machine.
[0311] The hood element 158 is arranged on the central element 134
and in particular on the housing 136 such as to be rotatable about
the rotational axis 154. Thereby, the tool head 108 can be guided
comfortably along an edge region or a corner region of a surface
that is to be treated substantially independently of the
orientation of the rest of the abrading machine 100.
[0312] In order to prevent unwanted twisting of the hood element
158, the hood device 156 comprises a braking device 222.
[0313] The braking device 222 may, for example, comprise a spring
device, a friction device or a latching device in order to hold the
hood element 158 of the hood device 156 in a desired position.
[0314] Furthermore, the hood device 156 comprises two contact
elements 224.
[0315] The contact elements 224 form contact sections 226 of the
hood device 156 for the lateral placement and guidance of the hood
element 158 on an edge region or along an edge region for example
in the transition area between two walls.
[0316] Thereby, the contact sections 226 have surfaces 228 which
run at least approximately in the plane 216 and contact surfaces
230 for the placement of the hood element 158.
[0317] The contact elements 224 and/or the contact sections 226 can
be formed in one-piece manner with the hood element 158 (see in
particular FIG. 12). As an alternative thereto, provision may be
made for the contact elements 224 and/or the contact sections 226
to be separate elements that are connected to the hood element 158
for example.
[0318] As can be derived in particular from FIG. 12, the sealing
ring 165 of the sealing device 161 and in particular, the brush
collar 166 of the brush device 162 is not a closed ring due to the
recess 214.
[0319] Rathermore, the sealing device 161 of the hood element 158
only extends from one side 232a of the recess 214 along the
peripheral direction 164 of the hood element 158 up to the side
232b of the recess 214 that is located opposite to the side
232a.
[0320] The recess 214 can thus lead to abraded material that is
present in the hood chamber 160 escaping into the environment.
[0321] This however, can be prevented by a suitably dimensioned
exhaust process.
[0322] In all other respects, the second embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 10 to 12
corresponds in regard to the construction and functioning thereof
with the first embodiment illustrated in FIGS. 1 to 9, and insofar,
reference should be made to the previous description thereof.
[0323] A third embodiment of a handheld abrading machine 100 which
is illustrated in FIGS. 13 to 18 differs from the second embodiment
illustrated in FIGS. 10 to 12 mainly in that that the hood device
156 comprises a cover element 234 for covering the recess 214.
[0324] Thereby, the cover element 234 is arranged on the hood
element 158 in hinged or pivotal manner for example.
[0325] In particular thereby, a pivotal axis 236 of the cover
element 234 is arranged substantially perpendicularly to the
rotational axis 154 and is spaced therefrom.
[0326] As can be derived in particular from FIGS. 15 and 18, the
cover element 134 comprises a sealing device 237, in particular, a
brush device 238.
[0327] Thereby, the sealing device 237 of the cover element 234 is
formed in such a way that the sealing device 161 of the hood
element 158 is supplemented by means of the sealing device 237 of
the cover element 234 so as to form a substantially complete
sealing ring 165 and in particular, a substantially complete
ring-shaped brush collar 166 in the covering position of the cover
element 234 illustrated in FIGS. 13 to 15.
[0328] In the covering position illustrated in FIGS. 13 to 15, the
hood chamber 160 is preferably substantially closed by means of the
cover element 234.
[0329] Thus, in the covering position of the cover element 234,
unwanted escape of abraded material from the hood chamber 160 can
be prevented effectively.
[0330] In the covering position of the cover element 234, the
handheld abrading machine 100 is suitable, in particular, for the
treatment of larger surfaces. In order to enable edge regions to be
treated, the cover element 234 can then be moved into the open
position that is illustrated in FIGS. 16 to 18.
[0331] In all other respects, the third embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 13 to 18
corresponds in regard to the construction and functioning thereof
with the second embodiment illustrated in FIGS. 10 to 12 and/or
with the first embodiment illustrated in FIGS. 1 to 9, and insofar,
reference should be made to the previous descriptions thereof.
[0332] A fourth embodiment of a handheld abrading machine 100 which
is illustrated in FIGS. 19 to 24 differs from the third embodiment
illustrated in FIGS. 13 to 18 mainly in that that the cover element
234 is arranged on the central element 134 and in particular, on
the housing 136 of the tool head 108 and is rotatable about the
rotational axis 154.
[0333] The cover element 234 is preferably flexible in order to
enable it to be moved past the contact elements 224 from the
covering position illustrated in FIGS. 19 to 21 into the open
position illustrated in FIGS. 22 to 24 and back again.
[0334] In all other respects the fourth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 19 to 24
corresponds in regard to the construction and functioning thereof
with the third embodiment illustrated in FIGS. 13 to 18, and
insofar, reference should be made to the previous description
thereof.
[0335] In a (not illustrated) further embodiment of a handheld
abrading machine 100, the cover element 234 is arranged on the hood
element 158 such as to be removable in order to enable it to be
placed selectively in the covering position or in the open
position.
[0336] A fifth embodiment of a handheld abrading machine 100 which
is illustrated in FIGS. 25 and 26 differs from the first embodiment
illustrated in FIGS. 1 to 9 mainly in that the drive motor 104 is
coupled to the transmission shaft 130 by means of an offsetting
device 240.
[0337] The motor shaft rotational axis 202 and the transmission
shaft rotational axis 192 are arranged such that they are parallel
to each other but at the same time, they are offset and especially
spaced from one another.
[0338] Furthermore, the motor shaft rotational axis 202 is arranged
such as to be parallel to and spaced from the longitudinal axis 194
of the tubular bar 110.
[0339] As can be derived in particular from FIG. 25, the abrading
machine 100 can be sub-divided into a motor side 244 and a tool
side 246 with respect to a longitudinal plane 242 in which the
longitudinal axis 194 of the tubular bar 110 runs and which is
oriented substantially perpendicularly to a plane defined by the
symmetry axes 198 of the tubing elements 112.
[0340] The drive motor 104 is arranged on the motor side 244 of the
abrading machine 100.
[0341] The tool head 108 is arranged on the tool side 246.
[0342] In particular, a center of gravity 248 of the drive motor
104 is located on the motor side 244. A center of gravity 250 of
the tool head 108 is preferably arranged on the tool side 246.
[0343] The drive motor 104 and the tool head 108 are preferably
arranged on mutually opposite sides of the longitudinal axis 194 of
the tubular bar 110, in particular, of the longitudinal plane
242.
[0344] Thereby, a center of gravity 252 of the abrading machine 100
can preferably be set particularly close to the tubular bar 110 and
in particular, in the tubular bar 110.
[0345] The abrading machine 100 is thereby easy to handle and
provides a simple, efficient and as fatigue-free an abrading action
as possible.
[0346] As can be derived in particular from FIG. 26, the offsetting
device 240 is in the form of a toothed belt device 254.
[0347] The toothed belt device 254 can function as a gear unit 140
and, as such, enables in particular a reduction to be effected
during the transmission of the rotational movement of the drive
motor 104 to the transmission shaft 130.
[0348] In all other respects the fifth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 25 and 26
corresponds in regard to the construction and functioning thereof
with the first embodiment illustrated in FIGS. 1 to 9 so that
reference should be made to the previous description thereof.
[0349] Furthermore, provision may be made for the fifth embodiment
of the abrading machine 100 that is illustrated in FIGS. 25 and 26
to comprise a hood device 156 in accordance with the embodiments
two, three or four of the abrading machine 100.
[0350] A sixth embodiment of a handheld abrading machine 100 which
is illustrated in FIGS. 27 to 29 differs from the fifth embodiment
illustrated in FIGS. 25 and 26 mainly in that the offsetting device
240 is in the form of a gear wheel device 256.
[0351] In all other respects the sixth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 27 to 29
corresponds in regard to the construction and functioning thereof
with the fifth embodiment described in the FIGS. 25 and 26 or the
embodiments one to four described in FIGS. 1 to 24, and insofar,
reference should be made to the previous descriptions thereof.
[0352] A seventh embodiment of a handheld abrading machine 100
which is illustrated in FIGS. 30 and 31 differs from the first
embodiment illustrated in FIGS. 1 to 9 mainly in that no telescopic
device 184 is provided.
[0353] Consequently, the spacing between the drive motor 104 and
the tool head 108 is always constant in the seventh embodiment
illustrated in FIGS. 30 and 31.
[0354] In all other respects, the seventh embodiment of the
handheld abrading machine 100 that is illustrated in FIGS. 30 and
31 corresponds in regard to the construction and functioning
thereof with the first embodiment illustrated in FIGS. 1 to 9, and
insofar, reference should be made to the previous description
thereof.
[0355] However, provision could also be made for the seventh
embodiment of the handheld abrading machine 100 which is
illustrated in FIGS. 30 and 31 to incorporate particular ones or a
plurality of the features of the other embodiments.
[0356] An eighth embodiment of a handheld abrading machine 100
which is illustrated in FIGS. 32 to 35 differs from the first
embodiment illustrated in FIGS. 1 to 9 mainly in that the drive
motor 104 and the tool head 108 are connected to one another by
only one tubing element 112, namely, the tubing element 112 forming
the tubular bar 110.
[0357] A telescopic device 184 is not provided.
[0358] In the case of the eighth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 32 to 35, the
motor shaft rotational axis 202 is oriented transversely with
respect to the longitudinal axis 194 of the tubular bar 110.
[0359] In particular, the motor shaft rotational axis 202 and the
longitudinal axis 194 of the tubular bar 110 include an angle of
approximately 12.degree. therebetween.
[0360] The motor shaft rotational axis 202 is a motor shaft
rotational axis 203 which is oriented transversely to the
longitudinal axis 194 of the tubular bar 110.
[0361] The transmission shaft 130 is flexible at least in the
region of the tubular bar 110 and is bent or curved in the tubular
bar 110.
[0362] The transmission shaft 130 is fed into the tubular bar 110
transversely relative to the longitudinal axis 194 of the tubular
bar 110 at the end 200 of the tubular bar 110 towards the drive
motor 104, i.e. at the proximal end 114 of the tubular bar 110.
[0363] The transmission shaft 130 is fed out of the tubular bar 110
in a direction running transversely relative to the longitudinal
axis 194 of the tubular bar 110 at an end 260 of the tubular bar
110 towards the tool head 108, i.e. at the distal end 116 of the
tubular bar 110.
[0364] An interior space 262 of the tubular bar 110 is split in two
by means of a partition wall 264.
[0365] Thereby, an interior space part 266 serves for accommodating
and for the guidance of the transmission shaft 130.
[0366] A further interior space part 268 serves as a tubular
suction channel section 176c.
[0367] In the interior space 262 of the tubular bar 110, there is
arranged at least one guide element 270, in particular, a guide
channel 272 for the guidance of the transmission shaft 130 (see in
particular FIG. 34).
[0368] The guide element 270 and in particular, the guide channel
272 can be formed by a groove 274 arranged in the partition wall
264 for example.
[0369] In the case too of the eighth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 32 to 35, the
drive motor 104 and the tool head 108 are arranged on mutually
opposite sides 244, 246 of the longitudinal axis 194 of the tubular
bar 110 and in particular, of the longitudinal plane 242. Here too,
an advantageous weight distribution of the handheld abrading
machine 100 can be obtained.
[0370] In all other respects, the eighth embodiment of the handheld
abrading machine 100 that is illustrated in FIGS. 32 to 35
corresponds in regard to the construction and functioning thereof
with the first embodiment illustrated in FIGS. 1 to 9, and insofar,
reference should be made to the previous description thereof.
[0371] In the case of the eighth embodiment of the handheld
abrading machine 100 illustrated in FIGS. 32 to 35, this too can be
developed further by means of particular ones or a plurality of
features of the embodiments two to seven.
[0372] A ninth embodiment of a handheld abrading machine 100 which
is illustrated in FIG. 36 differs from the fifth embodiment
illustrated in FIGS. 25 and 26 mainly in that the offsetting device
240 is formed by a flexible end 276 of the transmission shaft 130
towards the drive motor 104.
[0373] The end 276 of the transmission shaft 130 towards the drive
motor 104 is connected to the drive motor 104 by means of a
planetary gear 142 in such a way that a rotational axis 278 of the
end 276 of the transmission shaft 130 towards the drive motor 104
and the motor shaft rotational axis 202 are at least approximately
identical.
[0374] Nevertheless, an offset between the motor shaft rotational
axis 202 and the longitudinal axis 194 of the tubular bar 110 is
possible due to the flexible arrangement of the transmission shaft
130. Thus, in particular, an offset between the motor shaft
rotational axis 202 and a rotational axis 192 of the transmission
shaft 130 is also possible in the engagement region 208 of the
tubular bar 110.
[0375] In the ninth embodiment of the abrading machine 100
illustrated in FIG. 36, the motor shaft rotational axis 202 is
offset away from the tool head 108 in a direction running
perpendicularly to the longitudinal plane 242.
[0376] The motor shaft rotational axis 202 is located opposite the
tool head 108 taken with respect to the longitudinal axis 194 of
the tubular bar 110.
[0377] Nevertheless, the drive motor 104 is arranged on the same
side of the tubular bar 110 as the tool head 108 since the tubular
bar 110 comprises two bends 280 by means of which the proximal end
114 of the tubular bar 110 towards the drive motor 104 is offset
from the longitudinal axis 194 of the tubular bar 110 and in
particular, in the engagement region 208 of the tubular bar 110 and
is also offset away from the tool head 108.
[0378] In all other respects the ninth embodiment of the handheld
abrading machine 100 that is illustrated in FIG. 36 corresponds in
regard to the construction and functioning thereof with the fifth
embodiment illustrated in FIGS. 25 and 26 or with the embodiments
one to four illustrated in FIGS. 1 to 24, and insofar, reference
should be made to the previous descriptions thereof.
[0379] A tenth embodiment of a handheld abrading machine 100 which
is illustrated in FIG. 37 differs from the first embodiment
illustrated in FIGS. 1 to 9 mainly in that the tubular bar 110
comprises a bend 280, wherein the drive motor 104 directly follows
the proximal end 114 of the tubular bar 110 after the bend 280.
[0380] The motor shaft rotational axis 202 of the drive motor 104
and an axis of symmetry 282 of the proximal end 114 of the tubular
bar 110 are substantially identical.
[0381] The motor shaft rotational axis 202 is a motor shaft
rotational axis 203 oriented transversely relative to the
longitudinal axis 194 of the tubular bar 110.
[0382] The bend 280 is formed in such a way that the drive motor
104 is arranged opposite the tool head 108 taken with respect to
the longitudinal axis 194 of the tubular bar 110.
[0383] Thus, the ninth embodiment of the handheld abrading machine
100 illustrated in FIG. 37 also has an advantageous weight
distribution.
[0384] In all other respects the tenth embodiment of the handheld
abrading machine 100 that is illustrated in FIG. 37 corresponds in
regard to the construction and functioning thereof with the first
embodiment illustrated in FIGS. 1 to 9, and insofar, reference
should be made to the previous description thereof.
[0385] As an alternative or in addition thereto, further
development of the tenth embodiment of the handheld abrading
machine 100 that is illustrated in FIG. 37 may also be effected by
means of particular ones or a plurality of the features of the
further embodiments.
[0386] An eleventh embodiment of a handheld abrading machine 100
which is illustrated in FIG. 38 differs from the ninth embodiment
illustrated in FIG. 36 mainly in that the tubular bar 110 does not
comprise a bend 280 at least at its proximal end 114.
[0387] The drive motor 104 is located on the opposite side of the
tubular bar 110 to the tool head 108.
[0388] The transmission shaft 130 is fed into the interior space
262 of the tubular bar 110 through a through-opening 284. For the
purposes of protecting the transmission shaft 130 in the region
between the housing 210 for the drive motor 104 and the tubular bar
110, provision may be made for a (not illustrated) protective
device.
[0389] The through-opening 284 is preferably a through-opening 284
which differs from the openings 283 of the tubular bar 110 that
form a base area of the tubular bar 110.
[0390] In particular, the through-opening 284 is arranged and/or
formed in a side wall 285 of the tubular bar 110.
[0391] In all other respects, the eleventh embodiment of the
handheld abrading machine 100 that is illustrated in FIG. 38
corresponds in regard to the construction and functioning thereof
with the ninth embodiment illustrated in FIG. 36 so that reference
should be made to the previous description thereof.
[0392] The eleventh embodiment of the abrading machine 100 that is
illustrated in FIG. 38 can also be further developed by means of
particular ones or a plurality of features of the other
embodiments.
[0393] A twelfth embodiment of a handheld abrading machine 100
which is illustrated in FIG. 39 mainly differs from the eighth
embodiment illustrated in FIGS. 32 to 35 in that the interior space
part 266 of the tubular bar 110 forming the tubular suction channel
section 176c comprises a bend 280. The suction channel 172 can thus
be passed through underneath the drive motor 104 in space-saving
manner. The housing 210 can thereby be formed in a particularly
compact manner.
[0394] In all other respects, the twelfth embodiment of the
handheld abrading machine 100 that is illustrated in FIG. 39
corresponds in regard to the construction and functioning thereof
with the eighth embodiment described in FIGS. 32 to 35, and
insofar, reference should be made to the previous description
thereof.
[0395] The twelfth embodiment of the abrading machine 100 that is
illustrated in FIG. 39 can also be further developed by means of
particular ones or a plurality of features of the other
embodiments.
[0396] A thirteenth embodiment of a handheld abrading machine 100
which is illustrated in FIG. 40 differs from the twelfth embodiment
illustrated in FIG. 39 mainly in that the tubular bar 110 comprises
a plurality of bends 280. The tubular bar 110 thus has a plurality
of longitudinal axes 194.
[0397] In particular, the tubular bar 110 has a longitudinal axis
286 of a central section 288 of the tubular bar 110.
[0398] The central section 288 is, in particular, a central linear
section 288 between the drive motor 104 and the tool head 108.
[0399] The central section 288 is, in particular, the engagement
region 208 of the tubular bar 110 which is gripped by a user when
the abrading machine 100 is effecting an abrading action.
[0400] In particular, the central section 288 of the tubular bar
110 is that section of the tubular bar 110 in which or close to
which the center of gravity 252 of the handheld abrading machine
100 is located.
[0401] In all other respects, the thirteenth embodiment of the
handheld abrading machine 100 that is illustrated in FIG. 40
corresponds in regard to the construction and functioning thereof
with the twelfth embodiment illustrated in FIG. 39, and insofar,
reference should be made to the previous description thereof.
[0402] The thirteenth embodiment of the abrading machine 100 that
is illustrated in FIG. 40 can also be further developed by means of
particular ones or a plurality of features of the other
embodiments.
[0403] Preferred embodiments are the following. [0404] 1. A
handheld abrading machine (100) comprising a holding device (102)
for holding the abrading machine (100), a drive motor (104) and a
tool head (108), wherein the holding device (102) comprises a
substantially tubular bar (110) which has a proximal end (114) and
a distal end (116), wherein the drive motor (104) is arranged at
the proximal end (114), wherein the tool head (108) is arranged at
the distal end (116), wherein the abrading machine (100) comprises
a transmission shaft (130) which connects the drive motor (104) to
a tool holder (132) of the tool head (108) for transmitting torque
thereto and which runs at least in sections thereof within the
tubular bar (110). [0405] 2. A handheld abrading machine (100) in
accordance with embodiment 1, characterized in that the abrading
machine (100) comprises a suction device (170) which comprises a
suction channel (172) having a substantially ring-shaped or
ring-section-shaped suction channel section (176a), wherein the
substantially ring-shaped or ring-section-shaped suction channel
section (176a) surrounds a coupling device (138) for coupling the
transmission shaft (130) to the tool holder (132) at least in
sections thereof. [0406] 3. A handheld abrading machine (100) in
accordance with embodiment 2, characterized in that the
substantially ring-shaped or ring-section-shaped suction channel
section (176a) surrounds at least approximately concentrically a
gear unit (140) for coupling the transmission shaft (130) to the
tool holder (132). [0407] 4. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 3, characterized in
that the tool holder (132) and an end (144) of the transmission
shaft (130) towards the tool holder (132) are connected to one
another by means of a planetary gear (142). [0408] 5. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 4, characterized in that a substantially ring-shaped or
ring-section-shaped suction channel section (176a) of a suction
channel (172) of a suction device (170), the tool holder (132), an
end (144) of the transmission shaft (130) towards the tool holder
(132) and/or a hood device (156) for covering the tool holder (132)
are arranged such as to be substantially mutually coaxial. [0409]
6. A handheld abrading machine (100) in accordance with any of the
embodiments 1 to 5, characterized in that the transmission shaft
(130) is flexible at least in sections thereof. [0410] 7. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 6, characterized in that the tool head (108) is
connected to the holding device (102) such as to be pivotal about
one or more pivotal axes (120). [0411] 8. A handheld abrading
machine (100) in accordance with embodiment 7, characterized in
that an end (144) of the transmission shaft (130) towards the tool
holder (132) is pivotal together with the tool head (108) about one
or more pivotal axes (120). [0412] 9. A handheld abrading machine
(100) in accordance with any of the embodiments 1 to 8,
characterized in that the handheld abrading machine (100) comprises
two or more gear units (140) for coupling the drive motor (104) to
the tool holder (132), wherein at least one respective gear unit
(140) is arranged at an end (276) of the transmission shaft (130)
towards the drive motor (104) and also at an end (144) of the
transmission shaft (130) towards the tool holder (132). [0413] 10.
A handheld abrading machine (100) in accordance with any of the
embodiments 1 to 9, characterized in that the suction channel (172)
of the suction device (170) of the handheld abrading machine (100)
and the transmission shaft (130) run together at least in sections
thereof in a tubing element (112) of the handheld abrading machine
(100). [0414] 11. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 10, characterized in that the
substantially ring-shaped or ring-section-shaped suction channel
section (176a) is connected in space-fixed manner to the coupling
device (138) by means of which the tool holder (132) and an end
(144) of the transmission shaft (130) towards the tool holder (132)
are connected to one another. [0415] 12. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 11,
characterized in that the substantially ring-shaped or
ring-section-shaped suction channel section (176a) is folioed at
least in sections thereof by a housing (136) of the coupling device
(138) for coupling the transmission shaft (130) to the tool holder
(132). [0416] 13. A handheld abrading machine (100) in accordance
with embodiment 12, characterized in that the housing (136) is
connected to the holding device (102) in pivotal manner by means of
at least one swivel element (122). [0417] 14. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 13,
characterized in that the substantially ring-shaped or
ring-section-shaped suction channel section (176a) of the suction
channel (172) and a suction channel section (176c) of the suction
channel (172) running within a tubular bar (110) of the holding
device (102) are connected to one another in fluid-conveying manner
by means of a flexible suction channel section (176b) of the
suction channel (172). [0418] 15. A handheld abrading machine (100)
in accordance with embodiment 14, characterized in that the
transmission shaft (130) runs at least in sections thereof within a
flexible tubing element (180) comprising and/or forming the
flexible suction channel section (176b). [0419] 16. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 15, characterized in that the tool holder (132) is selectively
couplable to the transmission shaft (130) or removable from the
transmission shaft (130) by means of a coupling device (138).
[0420] 17. A handheld abrading machine (100) in accordance with any
of the embodiments 1 to 16, characterized in that the tool head
(108) comprises a hood device (156) for covering the tool holder
(132), wherein the hood device (156) comprises a hood element (158)
which has a substantially cylindrical hood chamber (160), wherein
the tool holder (132) together with a tool (106) arranged thereon
is arrangeable at least in sections thereof in the hood chamber
(160). [0421] 18. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 17, characterized in that the hood
element (158) comprises a recess (214) in the form of a segment of
a cylinder so that a tangent (220) touching an edge (218) of the
tool (106) arranged in the tool holder (132) runs substantially in
a plane (216) delimiting the recess (214) in the form of a segment
of a cylinder. [0422] 19. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 18, characterized in
that the tool holder (132), the transmission shaft (130) and the
hood element (158) are arranged on a central element (134) of the
tool head (108) in rotatable manner. [0423] 20. A handheld abrading
machine (100) in accordance with embodiment 19, characterized in
that the tool holder (132), an end (144) of the transmission shaft
(130) towards the tool holder (132) and the hood element (158) are
arranged on the central element (134) of the tool head (108) such
as to be rotatable about at least approximately mutually parallel
rotational axes (154). [0424] 21. A handheld abrading machine (100)
in accordance with either of the embodiments 19 or 20,
characterized in that the tool holder (132), an end (144) of the
transmission shaft (130) towards the tool holder (132) and the hood
element (158) are arranged on the central element (134) of the tool
head (108) such as to be rotatable about a common rotational axis
(154). [0425] 22. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 21, characterized in that a
central element (134) of the tool head (108) is connected to the
holding device (102) such as to be pivotal about one or more
pivotal axes (120). [0426] 23. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 22, characterized in
that a central element (134) of the tool head (108) is a housing
(136) for a coupling device (138) for coupling the transmission
shaft (130) to the tool holder (132). [0427] 24. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 23, characterized in that the hood device (156) comprises a
braking device (222) by means of which an unwanted rotational
movement of the hood element (158) is brakable. [0428] 25. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 24, characterized in that the hood device (156)
comprises a cover element (234) by means of which the recess (214)
in the form of a segment of a cylinder in the hood element (158) is
coverable. [0429] 26. A handheld abrading machine (100) in
accordance with embodiment 25, characterized in that the cover
element (234) is moveable into a covering position in which the
recess (214) in the form of a segment of a cylinder is covered, and
into an open position in which the hood chamber (160) is accessible
through the recess (214). [0430] 27. A handheld abrading machine
(100) in accordance with either of the embodiments 25 or 26,
characterized in that the cover element (234) is arranged on the
hood element (158) in rotatable, pivotal, hinged and/or releasable
manner. [0431] 28. A handheld abrading machine (100) in accordance
with any of the embodiments 25 to 27, characterized in that the
cover element (234) is rotatable or pivotal about a pivotal axis
(236) which is oriented at least approximately perpendicularly to
the rotational axis (154) of the tool holder (132). [0432] 29. A
handheld abrading machine (100) in accordance with any of the
embodiments 25 to 28, characterized in that the cover element (234)
is rotatable or pivotal about a rotational axis (154) which is
oriented at least approximately parallel to the rotational axis
(154) of the tool holder (132). [0433] 30. A handheld abrading
machine (100) in accordance with any of the embodiments 25 to 29,
characterized in that the hood element (158) comprises a sealing
device (161) which extends along the periphery of the cylindrical
hood chamber (160) at least approximately from one side (232a;
232b) of the recess (214) in the form of a segment of a cylinder up
to the side (232a; 232b) of the recess (214) in the form of a
segment of a cylinder that is located opposite said one side (232a;
232b). [0434] 31. A handheld abrading machine (100) in accordance
with embodiment 30, characterized in that the cover element (234)
comprises a sealing device (237) which is arranged on the cover
element (234) in such a way that, in a covering position of the
cover element (234), the sealing device (161) of the hood element
(158) and the sealing device (237) of the cover element (234) form
a sealing ring (165) which at least approximately completely
surrounds the cylindrical hood chamber (160) in annular manner.
[0435] 32. A handheld abrading machine (100) in accordance with any
of the embodiments 1 to 31, characterized in that the hood device
(156) has one or more contact sections (226), the surfaces (228) of
which form a contact surface (230) for the lateral placement of the
tool head (108), wherein the contact surface (230) runs at least
approximately in the plane (216) which delimits the recess (214) in
the form of a segment of a cylinder. [0436] 33. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 32,
characterized in that the hood element (158) is formed in one-piece
manner with at least one contact section (226) of the hood device
(156). [0437] 34. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 33, characterized in that a motor
shaft rotational axis (203) of the drive motor (104) is oriented
transversely, and in particular is inclined, relative to a
longitudinal axis (194) of the tubular bar (110). [0438] 35. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 34, characterized in that the longitudinal axis
(194) of the tubular bar (110) is a longitudinal axis (286), an
axis of symmetry (198) and/or a mid axis (196) of a central section
(288) of the tubular bar (110) between the drive motor (104) and
the tool head (108). [0439] 36. A handheld abrading machine (100)
in accordance with any of the embodiments 1 to 35, characterized in
that the longitudinal axis (194) of the tubular bar (110) is a
longitudinal axis (286), an axis of symmetry (198) and/or a mid
axis (196) of a central linear section (288) of the tubular bar
(110) between the drive motor (104) and the tool head (108). [0440]
37. A handheld abrading machine (100) in accordance with any of the
embodiments 1 to 36, characterized in that the longitudinal axis
(194) of the tubular bar (110) is a longitudinal axis (194) of an
engagement region (208) of the tubular bar (110) which is gripped
by a user when the abrading machine (100) is effecting an abrading
action. [0441] 38. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 37, characterized in that a center
of gravity (248) of the drive motor (104) and a center of gravity
(250) of the tool head (108) are located on mutually opposite sides
(244; 246) of the longitudinal axis (194) of the tubular bar (110).
[0442] 39. A handheld abrading machine (100) in accordance with any
of the embodiments 1 to 38, characterized in that the tubular bar
(110) comprises one or more guide elements (270) for the guidance
of the transmission shaft (130). [0443] 40. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 39,
characterized in that the transmission shaft (130) is flexible at
least in sections thereof and runs bent or curved in the tubular
bar (110) at least in sections thereof. [0444] 41. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 40, characterized in that the transmission shaft (130) is fed
into the tubular bar (110) at the proximal end (114) of the tubular
bar (110) in a direction running transversely to the longitudinal
axis (194) of the tubular bar (110). [0445] 42. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 41,
characterized in that the transmission shaft (130) is fed into the
tubular bar (110) at the proximal end (114) of the tubular bar
(110) substantially parallel to an axis of symmetry (282) of the
proximal end (114) of the tubular bar (110). [0446] 43. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 42, characterized in that the proximal end (114) of the tubular
bar (110) and/or the distal end (116) of the tubular bar (110)
comprises at least one bend (280). [0447] 44. A handheld abrading
machine (100) in accordance with any of the embodiments 1 to 43,
characterized in that the transmission shaft (
130) is fed out of the tubular bar (110) at the distal end (116) of
the tubular bar (110) in a direction running transversely to the
longitudinal axis (194) of the tubular bar (110). [0448] 45. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 44, characterized in that the transmission shaft
(130) is fed out of the tubular bar (110) at the distal end (116)
of the tubular bar (110) substantially parallel to an axis of
symmetry (198) of the distal end (116) of the tubular bar (110).
[0449] 46. A handheld abrading machine (100) in accordance with any
of the embodiments 1 to 45, characterized in that the motor shaft
rotational axis (202) and a rotational axis (278) of the end (276)
of the transmission shaft (130) towards the drive motor (104) are
mutually offset. [0450] 47. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 46, characterized in
that the drive motor (104) and the transmission shaft (130) are
connected to one another by means of an offsetting device (240) by
means of which a rotational movement of a motor shaft (212) of the
drive motor (104) is transferable to an end (276) of the
transmission shaft (130) which is towards the drive motor (104) and
is offset from the motor shaft (212). [0451] 48. A handheld
abrading machine (100) in accordance with any of the embodiments 1
to 47, characterized in that the tubular bar (110) comprises a
through-opening (284) which differs from openings (283) at the ends
(114; 116) of the tubular bar (110) and through which the
transmission shaft (130) is fed into an interior space (262) of the
tubular bar (110) or is fed out of the interior space (262) of the
tubular bar (110). [0452] 49. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 48, characterized in
that the tubular bar (110) comprises a through-opening (284) which
differs from openings (283) at the ends of the tubular bar (110)
and by means of which an interior space (262) of the tubular bar
(110) serving as a suction channel section (176) of a suction
channel (172) of a suction device (170) is connected in
fluid-conveying manner to at least one further suction channel
section (176) of the suction channel (172) of the suction device
(170). [0453] 50. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 49, characterized in that the
tubular bar (110) comprises an engagement region (208) which is
gripped by a user when the abrading machine (100) is effecting an
abrading action. [0454] 51. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 50, characterized in
that a motor shaft rotational axis (202) of the drive motor (104)
is oriented substantially parallel to the longitudinal axis (194)
of the tubular bar (110). [0455] 52. A handheld abrading machine
(100) in accordance with any of the embodiments 1 to 51,
characterized in that a motor shaft (212) of the drive motor (104)
and an end (276) of the transmission shaft (130) towards the drive
motor (104) are mutually offset with respect to a direction running
perpendicularly to the longitudinal axis (194) of the tubular bar
(110) and/or with respect to a direction running parallel to the
longitudinal axis (194) of the tubular bar (110). [0456] 53. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 52, characterized in that a motor shaft rotational
axis (202), a rotational axis (278) of an end (276) of the
transmission shaft (130) towards the drive motor (104) and/or a
rotational axis of a section of the transmission shaft (130)
running in the engagement region (208) of the tubular bar (110) run
at least approximately in parallel with each other. [0457] 54. A
handheld abrading machine (100) in accordance with any of the
embodiments 1 to 53, characterized in that a motor shaft rotational
axis (202), a rotational axis (278) of an end (144) of the
transmission shaft (130) towards the drive motor (104) and/or a
rotational axis of a section of the transmission shaft (130)
running in the engagement region (208) of the tubular bar (110) are
mutually offset with respect to a direction running perpendicularly
to the longitudinal axis (194) of the tubular bar (110). [0458] 55.
A handheld abrading machine (100) in accordance with any of the
embodiments 1 to 54, characterized in that an offsetting device
(240) comprises a gear wheel device (256) for the transmission of
the rotational movement. [0459] 56. A handheld abrading machine
(100) in accordance with any of the embodiments 1 to 55,
characterized in that an offsetting device (240) comprises a
toothed belt device (254) for the transmission of the rotational
movement. [0460] 57. A handheld abrading machine (100) in
accordance with any of the embodiments 1 to 56, characterized in
that a motor shaft (212) of the drive motor (104) and an end (276)
of the transmission shaft (130) towards the drive motor (104) are
arranged at least approximately coaxially with respect to each
other. [0461] 58. A handheld abrading machine (100) in accordance
with any of the embodiments 1 to 57, characterized in that a motor
shaft (212) of the drive motor (104) and a section of the
transmission shaft (130) running in the engagement region (208) of
the tubular bar (110) are arranged such that they are mutually
offset with respect to a direction running perpendicularly to the
longitudinal axis (194) of the tubular bar (110). [0462] 59. A
handheld abrading machine (100) in accordance with embodiment 58,
characterized in that the motor shaft (212) of the drive motor
(104) and the section of the transmission shaft (130) running in
the engagement region (208) of the tubular bar (110) are connected
to one another by means of a flexible section of the transmission
shaft (130).
LIST OF REFERENCE SYMBOLS
[0462] [0463] 100 abrading machine [0464] 102 holding device [0465]
104 drive motor [0466] 106 tool [0467] 108 tool head [0468] 110
tubular bar [0469] 112 tubing element [0470] 114 proximal end
[0471] 116 distal end [0472] 118 swivel device [0473] 120 pivotal
axis [0474] 120a first pivotal axis [0475] 120b second pivotal axis
[0476] 122 swivel element [0477] 124 swivel fork [0478] 126 swivel
ring [0479] 128 attachment element [0480] 129 attachment arm [0481]
130 transmission shaft [0482] 130a first part of the transmission
shaft [0483] 130b second part of the transmission shaft [0484] 132
tool holder [0485] 134 central element [0486] 136 housing [0487]
138 coupling device [0488] 140 gear unit [0489] 142 planetary gear
[0490] 143 central wheel (sun wheel) [0491] 144 end of the
transmission shaft 130 towards the tool holder 132 [0492] 145 outer
wheel (crown wheel) [0493] 146 drive shaft [0494] 147 planet wheel
[0495] 148 tool holder shaft [0496] 149 planet wheel carrier [0497]
150 releasable connecting device [0498] 152 output shaft [0499] 154
rotational axis [0500] 156 hood device [0501] 158 hood element
[0502] 160 hood chamber [0503] 161 sealing device [0504] 162 brush
device [0505] 164 peripheral direction [0506] 165 sealing ring
[0507] 166 brush collar [0508] 168 axis of symmetry [0509] 170
suction device [0510] 172 suction channel [0511] 174 connector
device [0512] 176 suction channel section [0513] 176a ring-shaped
or ring-section-shaped suction channel section [0514] 176b flexible
suction channel section [0515] 176c tubular suction channel section
[0516] 178 transition section [0517] 180 flexible tubing element
[0518] 182 fork-piece [0519] 184 telescopic device [0520] 186 outer
part [0521] 188 inner part [0522] 190 extension direction [0523]
192 transmission shaft rotational axis [0524] 194 longitudinal axis
of the tubular bar 110 [0525] 196 mid axis of the tubular bar 110
[0526] 198 axis of symmetry of the tubular bar 110 [0527] 200 end
of the tubular bar 110 towards the drive motor 104 [0528] 202 motor
shaft rotational axis [0529] 203 motor shaft rotational axis [0530]
204 locking device [0531] 206 handle element [0532] 208 engagement
region [0533] 210 housing [0534] 212 motor shaft [0535] 214 recess
[0536] 216 plane [0537] 218 edge [0538] 220 tangent [0539] 222
braking device [0540] 224 contact element [0541] 226 contact
section [0542] 228 surface [0543] 230 contact surface [0544] 232a
side [0545] 232b side [0546] 234 covering element [0547] 236
pivotal axis [0548] 237 sealing device [0549] 238 brush device
[0550] 240 offsetting device [0551] 242 longitudinal plane [0552]
244 motor side [0553] 246 tool side [0554] 248 center of gravity of
the drive motor 104 [0555] 250 center of gravity of the tool head
108 [0556] 252 center of gravity of the abrading machine 100 [0557]
254 toothed belt device [0558] 256 gear wheel device [0559] 260 end
[0560] 262 interior space [0561] 264 partition wall [0562] 266
interior space part [0563] 268 interior space part [0564] 270 guide
element [0565] 272 guide channel [0566] 274 groove [0567] 276 end
of the transmission shaft 130 towards the drive motor 104 [0568]
278 rotational axis [0569] 280 bend [0570] 282 axis of symmetry
[0571] 283 opening [0572] 284 through-opening [0573] 285 side wall
[0574] 286 longitudinal axis [0575] 288 central section
* * * * *