U.S. patent application number 14/934334 was filed with the patent office on 2016-06-30 for handheld abrading machine.
The applicant listed for this patent is Flex-Elektrowerkzeuge GmbH. Invention is credited to Udo Panzer, Dirk Roeck, Nazim Sabuncuoglu.
Application Number | 20160184954 14/934334 |
Document ID | / |
Family ID | 51162756 |
Filed Date | 2016-06-30 |
United States Patent
Application |
20160184954 |
Kind Code |
A1 |
Roeck; Dirk ; et
al. |
June 30, 2016 |
HANDHELD ABRADING MACHINE
Abstract
In order to provide a handheld abrading machine comprising a
holding device for holding the abrading machine, a drive motor, a
motor housing for the 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 motor housing and the
drive motor arranged therein are arranged at the proximal end and
wherein the tool head is arranged at the distal end, with which the
abrading process is easy and as fatigue-free as possible, it is
proposed that the motor housing comprise an attachment section for
fixing an extension element in releasable manner.
Inventors: |
Roeck; Dirk; (Ingersheim,
DE) ; Panzer; Udo; (Weissach, DE) ;
Sabuncuoglu; Nazim; (Ludwigsburg, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Flex-Elektrowerkzeuge GmbH |
Steinheim/Murr |
|
DE |
|
|
Family ID: |
51162756 |
Appl. No.: |
14/934334 |
Filed: |
November 6, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2014/064003 |
Jul 1, 2014 |
|
|
|
14934334 |
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Current U.S.
Class: |
451/344 |
Current CPC
Class: |
B24B 7/186 20130101;
B24B 23/005 20130101; B24B 55/10 20130101; B24B 7/184 20130101 |
International
Class: |
B24B 7/18 20060101
B24B007/18; B24B 55/10 20060101 B24B055/10; B24B 23/00 20060101
B24B023/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 5, 2013 |
DE |
10 2013 213 271 |
Claims
1. A handheld abrading machine comprising a holding device for
holding the abrading machine, a drive motor, a motor housing for
the drive motor and a tool head, wherein: the holding device
comprises a substantially tubular bar which has a proximal end and
a distal end, the motor housing and the drive motor arranged
therein are arranged at the proximal end, the tool head is arranged
at the distal end, and the motor housing comprises an attachment
section for fixing an extension element in releasable manner.
2. An abrading machine in accordance with claim 1 or in accordance
with the introductory portion of claim 1, wherein the abrading
machine comprises an attachment section for positively fixing an
extension element in releasable manner.
3. An abrading machine in accordance with claim 2, wherein the
abrading machine and/or the extension element comprises a latching
device for fixing the extension element in releasable manner.
4. An abrading machine in accordance with claim 3, wherein the
extension element is pushable onto the attachment section of the
abrading machine and/or is insertable into the attachment section
of the abrading machine and is thereby lockable.
5. An abrading machine in accordance with claim 3, wherein the
latching device comprises at least one unlatching element by means
of which locking of the extension element is releasable for the
purposes of removing the extension element.
6. An abrading machine in accordance with claim 5, wherein at least
one unlatching element is in the form of a pushbutton.
7. An abrading machine in accordance with claim 6, wherein the
latching device comprises two unlatching elements in the form of
pushbuttons which are arranged on mutually opposite sides of an
attachment section of the extension element and/or on mutually
opposite sides of the attachment section of the abrading
machine.
8. An abrading machine in accordance with claim 1 or in accordance
with the introductory portion of claim 1, wherein the abrading
machine comprises an attachment section for fixing an extension
element in releasable manner, wherein the attachment section
comprises an end of a suction channel which is remote from the tool
head, said suction channel extending from the tool head up to the
attachment section.
9. An abrading machine in accordance with claim 8, wherein the
extension element comprises an extension channel which, in the
assembled state of the extension element on the attachment section
of the abrading machine, adjoins the end of the suction channel of
the abrading machine that is remote from the tool head.
10. An abrading machine in accordance with claim 8, wherein the
attachment section of the abrading machine comprises the proximal
end of the tubular bar.
11. An abrading machine in accordance with claim 1, wherein the
extension element comprises a tubular bar.
12. An abrading machine in accordance with claim 1, wherein the
abrading machine comprises an extension element which comprises an
attachment section, and in that the attachment section of the
abrading machine is in the form of a recess or gap in the motor
housing, wherein the recess or gap in the motor housing and the
attachment section of the extension element are formed in such a
manner that the recess or gap in the motor housing are filled by
means of the attachment section of the extension element in the
assembled state of the extension element on the motor housing.
13. An abrading machine in accordance with claim 12, wherein an
outer contour of the motor housing defined by walls of the motor
housing is completable by means of the attachment section of the
extension element.
14. An abrading machine in accordance with claim 12, wherein an
outer surface of the attachment section of the extension element is
substantially flush with an outer surface of walls of the motor
housing in the assembled state of the extension element on the
motor housing.
15. An abrading machine in accordance with claim 1, wherein the
extension element is connectible to the tubular bar of the abrading
machine in releasable manner by means of an adapter element.
16. An abrading machine in accordance with claim 15, wherein the
extension element is connectible to the tubular bar of the abrading
machine in releasable manner in such a way that an interior space
of the extension element joins an interior space of the tubular bar
and is connected thereto in fluid-conveying manner.
17. An abrading machine in accordance with claim 1, wherein the
abrading machine comprises at least one spring element by means of
which the extension element is lockable in a position substantially
free from play in the assembled state.
18. An abrading machine in accordance with claim 1, wherein an
attachment section of the extension element and/or the attachment
section of the abrading machine comprises an injection moulded
component of synthetic material or is in the form of an injection
moulded component of synthetic material.
19. An abrading machine in accordance with claim 1, wherein an
earthing wire of the abrading machine, a tubular bar of the
extension element and/or a hose which is arrangeable on the
extension element, in particular a suction hose of a suction
device, are connected to one another electrically.
Description
RELATED APPLICATION
[0001] This application is a continuation application of
international application No. PCT/EP2014/064003 filed on Jul. 1,
2014, and claims the benefit of German application No. 10 2013 213
271.9 filed on Jul. 5, 2013, 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
and in particular, to a so-called long-neck abrader.
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 a simple and as fatigue-free an
abrading action as possible.
[0005] This object is achieved by a handheld abrading machine which
comprises a holding device for holding the abrading machine, a
drive motor, a motor housing for the 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 motor
housing and the drive motor arranged therein are arranged at the
proximal end and wherein the tool head is arranged at the distal
end.
[0006] In addition, in one embodiment of the invention, provision
is made for the motor housing to comprise an attachment section for
fixing an extension element in releasable manner.
[0007] It can be expedient if the abrading machine comprises an
extension element. However, provision could also be made for the
extension element to be an element separate from the abrading
machine. Preferably, a combination of an abrading machine and an
extension element is then provided.
[0008] An extension element is, in particular, an extension of the
holding device for holding the abrading machine so that a user of
the abrading machine can preferably reach a work area that is
further away from him with the tool head of the abrading
machine.
[0009] In a further embodiment of the invention, provision may be
made for the abrading machine to comprise an attachment section for
positively fixing an extension element in releasable manner.
[0010] Preferably, the abrading machine and/or the extension
element comprises a latching device for fixing the extension
element and in particular for fixing it in releasable manner.
[0011] As an alternative or in addition thereto, provision may be
made for the abrading machine and/or the extension element to
comprise a clamping device for fixing the extension element and in
particular for fixing it in a force-locking manner.
[0012] It can be expedient if the extension element is pushable
onto the attachment section of the abrading machine and/or is
insertable into the attachment section of the abrading machine.
Preferably, the extension element is lockable to the attachment
section of the abrading machine by the pushing and/or inserting
process.
[0013] It can be expedient if the latching device comprises at
least one unlatching element by means of which the locking of the
extension element is releasable for the purposes of removing the
extension element.
[0014] Preferably, the latching device comprises several, two for
example, unlatching elements.
[0015] For example, provision may be made for at least one
unlatching element, in particular several, for example two,
unlatching elements, to be in the form of a pushbutton.
[0016] In particular, provision may be made for one pushbutton to
be in the form of a spring-loaded pushbutton.
[0017] The latching device preferably comprises two unlatching
elements in the form of pushbuttons which are arranged on the
extension element and/or the motor housing on mutually opposite
sides of an attachment section of the extension element and/or on
mutually opposite sides of the attachment section of the abrading
machine, and in particular of the motor housing.
[0018] In a further embodiment of the invention, provision may be
made for the abrading machine to comprise an attachment section for
fixing an extension element in releasable manner, wherein the
attachment section comprises an end of a suction channel that is
remote from the tool head, said channel extending from the tool
head to the attachment section.
[0019] It can be expedient if the extension element comprises an
extension channel which joins the end of the suction channel of the
abrading machine that is remote from the tool head in the assembled
state of the extension element on the attachment section of the
abrading machine.
[0020] The attachment section of the abrading machine preferably
comprises the proximal end of the tubular bar of the abrading
machine, in particular the holding device of the abrading
machine.
[0021] The extension channel preferably adjoins the proximal end of
the tubular bar.
[0022] It can be expedient if the extension element comprises a
rigid tubular bar.
[0023] The tubular bar of the extension element preferably has, to
at least an approximate extent, the same cross section and/or
diameter as the tubular bar of the holding device of the abrading
machine.
[0024] In one embodiment of the invention, provision may be made
for the abrading machine to comprise an extension element which
comprises an attachment section, and for the attachment section of
the abrading machine to be in the form of a recess or gap in the
motor housing, wherein the recess or gap in the motor housing and
the attachment section of the extension element are formed in such
a manner that the recess or gap in the motor housing is filled up
by means of the attachment section of the extension element in the
assembled state of the extension element on the motor housing.
[0025] In particular, an outer contour of the motor housing defined
by walls of the motor housing is completable by means of the
attachment section of the extension element.
[0026] Provision may be made for an outer surface of the attachment
section of the extension element to be substantially flush with an
outer surface of walls of the motor housing in the assembled state
of the extension element on the motor housing. In this way,
dirt-susceptible edges or protuberances in the transition area
between the attachment section of the extension element and the
attachment section of the motor housing can preferably be reduced
or completely avoided.
[0027] The extension element is preferably connectible to the
tubular bar of the abrading machine in releasable manner by means
of an adapter element.
[0028] In particular, provision may be made for the extension
element to be connectible to the tubular bar of the abrading
machine in releasable manner in such a way that an interior space
of the extension element joins an interior space of the tubular bar
and is connected thereto in fluid-conveying manner.
[0029] In this way, an extension channel for extending a suction
channel of the abrading machine can be formed by means of the
extension element.
[0030] The abrading machine preferably comprises a connector device
for the attachment of a suction device such as a vacuum cleaner for
example.
[0031] The extension element preferably adjoins the connector
device of the abrading machine particularly in the region of the
attachment section of the extension element in the assembled state
of the extension element on the abrading machine.
[0032] Preferably, an end of the extension element remote from the
attachment section of the extension element likewise comprises a
connector device to which a suction device and in particular a
vacuum cleaner is connectible.
[0033] Thus, a suction channel which extends from the tool head to
the connector device of the extension element can be provided by
means of the extension element.
[0034] In one embodiment of the invention, provision may be made
for the abrading machine to comprise at least one spring element by
means of which the extension element is lockable to the abrading
machine in a position substantially free from play in the assembled
state.
[0035] In particular, the at least one spring element is a spring
element of an unlatching element and/or a locking element for
unlatching and/or locking a connection between the extension
element and the abrading machine.
[0036] The at least one spring element preferably acts on at least
one inclined surface of a clamping device for the purposes of
positioning the extension element on the abrading machine so as to
be substantially free from play.
[0037] Provision may be made for an attachment section of the
extension element and/or the attachment section of the abrading
machine to comprise an injection moulded component of synthetic
material or to be in the form of an injection moulded component of
synthetic material.
[0038] In particular, provision may be made for the motor housing
and the attachment section of the motor housing to be formed
together in one piece manner, and in particular for the attachment
section to be a component of the motor housing.
[0039] It can be expedient if the entire motor housing is in the
form of a one-piece or multi-piece injection moulded component of
synthetic material.
[0040] The abrading machine preferably comprises a suction device
which comprises a suction channel that extends from the tool head
to the attachment section of the abrading machine and is preferably
extendable by means of the extension element.
[0041] The abrading machine preferably comprises a transmission
shaft which connects the drive motor to a tool holder of the tool
head for torque-transmission purposes. The transmission shaft
preferably runs at least in sections thereof within the tubular bar
of the holding device.
[0042] The transmission shaft is preferably flexible at least in
sections thereof.
[0043] It can be advantageous if the tool head is connected to the
holding device such as to be pivotal about one or more axes.
[0044] In particular, provision may be made for an end of the
transmission shaft facing the tool holder together with the tool
head to be pivotal about one or more axes.
[0045] A suction channel of the suction device of the handheld
abrading machine and the transmission shaft preferably run
together, at least in sections, in the tubular bar of the holding
device of the abrading machine.
[0046] To this end for example, the tubular bar can be divided in a
longitudinal direction so that a partial interior space of the
tubular bar serves to guide and accommodate the transmission shaft,
while a further partial interior space of the tubular bar forms a
suction channel section of the suction channel.
[0047] The tool head of the abrading machine preferably comprises a
tool holder for accommodating a tool, in particular an abrader.
[0048] A tool accommodated in the tool holder can be driven in
preferably rotary, oscillatory and/or eccentric manner.
[0049] The tool is preferably fixable to the tool holder in
releasable manner by means of a releasable connection and in
particular by means of a hook and loop fastener.
[0050] The drive motor is preferably arranged on a side of a
central axis of the tubular bar of the holding device opposite the
tool head.
[0051] The abrading machine preferably comprises an engagement
region formed by the tubular bar as well as a handle element that
is preferably arranged on the motor housing. A user of the abrading
machine can get hold of the engagement region of the tubular bar
and the handle element in a particularly convenient manner and
thereby work with the abrading machine for a long period of time in
fatigue-free manner.
[0052] Preferably, a further engagement region and in particular an
engagement region formed by the tubular bar of the extension
element can be formed by means of the extension element.
[0053] In order to reach work surfaces that are located more
distantly from a user, the user preferably grips the handle element
and the engagement region of the extension element. In this case
too, the user can preferably work with the abrading machine for a
long period of time in fatigue-free manner.
[0054] It can be advantageous if an earthing wire of the abrading
machine, a tubular bar of the extension element and/or a hose that
is arranged or arrangeable on the extension element, and in
particular a suction hose of a suction device, are connected to one
another electrically.
[0055] In particular, provision may be made for suction nozzles
which are arranged on the tubular bar of the abrading machine and
to which the extension element is preferably fixable to be formed
from an electrically conductive material and in particular from an
electrically conductive synthetic material and/or be connected to
an earthing wire of the abrading machine. The suction nozzle is
thus preferably earthed.
[0056] The extension element and in particular an attachment
section of the extension element is preferably formed from an
electrically conductive material and in particular from an
electrically conductive synthetic material.
[0057] A tubular bar of the extension element is preferably formed
from an electrically conductive material and is directly connected
to the attachment section of the extension element.
[0058] The tubular bar of the extension element can preferably be
earthed by means of the attachment section of the extension element
via the earthing wire of the abrading machine.
[0059] In particular, the tubular bar can be in the form of an
aluminium tube.
[0060] A connector device of the extension element to which in
particular a suction hose of a suction device is connectible, is
preferably formed from an electrically conductive material and in
particular from an electrically conductive synthetic material.
[0061] Preferably, the hose and in particular the suction hose of
the suction device that is arrangeable on the connector device is
connected in electrically conductive manner with the earthing wire
of the abrading machine by means of the extension element and is
thereby earthed.
[0062] In particular, an unwanted static charge of the extension
element and/or the hose occurring when the abrading machine is in
operation can thus be preferably prevented.
[0063] Further preferred features and/or advantages of the
invention form the subject matter of the following description and
the graphical illustration of an exemplary embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
[0064] FIG. 1 shows a schematic perspective illustration of a
handheld abrading machine and of an extension element that is
arranged thereon, with a view to a top side of the abrading
machine;
[0065] FIG. 2 a schematic side view of the abrading machine
including the extension element depicted in FIG. 1;
[0066] FIG. 3 a schematic vertical longitudinal section through the
abrading machine and the extension element depicted in FIG. 1;
[0067] FIG. 4 an enlarged illustration of the region IV in FIG.
3;
[0068] FIG. 5 a schematic vertical cross section through a motor
housing of the abrading machine and an attachment section of the
extension element along the line 5-5 in FIG. 2 as seen in the
direction of the arrows;
[0069] FIG. 6 a schematic perspective illustration of the abrading
machine including the extension element as seen from below a lower
surface of the abrading machine;
[0070] FIG. 7 a schematic perspective illustration of the abrading
machine corresponding to FIG. 6 without an extension element
arranged thereon;
[0071] FIG. 8 an enlarged illustration of the region VIII in FIG.
7;
[0072] FIG. 9 a schematic perspective illustration of the extension
element depicted in FIG. 1 in the dismantled state thereof; and
[0073] FIG. 10 an enlarged illustration of the region X in FIG.
9.
[0074] Similar or functionally equivalent elements are provided
with the same reference numbers in all the Figures.
DETAILED DESCRIPTION
[0075] An embodiment of a handheld abrading machine which is
illustrated in FIGS. 1 to 10 and as a whole designated 100 is, for
example, a long-neck abrader by means of which large surfaces and
in particular wall areas, ceiling areas and floor areas are
treatable in an easy and comfortable manner.
[0076] The abrading machine 100 comprises a tool head 102 which
comprises a tool holder 104.
[0077] A tool 106 such as an abrasive means for example can be
arranged on the tool holder 104.
[0078] The tool head 102 is mounted on a holding device 110 of the
abrading machine 100 in pivotal manner by means of a swivel device
108.
[0079] In connection therewith, the swivel device 108 comprises a
fork element 112 and a swivel element 116 which is arranged on the
fork element 112 such as to be pivotal about a pivotal axis
114.
[0080] The swivel element 116 is in the form of swivel ring 118 for
example (see FIG. 2).
[0081] The fork element 112 is connected to a housing 120 of the
tool head 102 in pivotal manner by means of the swivel ring
118.
[0082] The fork element 112, the swivel element 116 and the housing
120 of the tool head 102 are thereby connected to one another in
such a manner that the tool head 102 is pivotal relative to the
fork element 112 about two pivotal axes 114 which are substantially
perpendicular to one another.
[0083] The holding device 110 of the abrading machine 100 comprises
a tubular bar 122 which has a proximal end 124 that faces the user
in the operational state, and a distal end 126 that is remote from
the user in the operational state.
[0084] The fork element 112 and thus the tool head 102 are arranged
at the distal end 126 of the tubular bar 122 of the holding device
110.
[0085] A motor housing 128 of the abrading machine 100 is arranged
at the proximal end 124 of the tubular bar 122 of the holding
device 110 opposite the distal end 126.
[0086] The motor housing 128 of the abrading machine 100 serves for
accommodating a drive motor 130 of the abrading machine 100.
[0087] The motor housing 128 comprises a handle element 132 by
means of which a user can grip the abrading machine 100 in a
particularly comfortable manner.
[0088] The drive motor 130 is coupled to the tool holder 104 by
means of a flexible shaft 134 so that the tool holder 104 including
a tool 106 arranged thereon is drivable in particular, in rotary,
oscillatory and/or eccentric manner.
[0089] The flexible shaft 134 runs at least in sections thereof
within the tubular bar 122.
[0090] Furthermore, the flexible shaft 134 runs at least in
sections thereof in a flexible tubing element 136 by means of which
the tubular bar 122 is connected to the housing 120 of the tool
head 102.
[0091] Furthermore, the abrading machine 100 comprises a suction
channel 138 which extends from the tool head 102 up to the proximal
end 124 of the tubular bar 122 and comprises a plurality of suction
channel sections 140.
[0092] In particular, the flexible tubing element 136 and the
tubular bar 122 form suction channel sections 140 of the suction
channel 138.
[0093] For optimal weight distribution of the abrading machine 100,
the drive motor 130 is preferably arranged on a side of a central
axis 142 of the tubular bar 122 that is located opposite the tool
head 102.
[0094] In the operational state of the abrading machine 100, the
user can take hold of the handle element 132 and the tubular bar
122 of the holding device 110 of the abrading machine 100 for
example.
[0095] The tubular bar 122 thus forms an engagement region 144 of
the abrading machine 100.
[0096] If now a user places one hand on the engagement region 144
of the tubular bar 122 of the holding device 110 and takes hold of
the handle element 132 with his other hand this then results in a
certain radius of action within which the user can reach a surface
that is to be treated by the tool head 102 from a given standing
position.
[0097] For the purposes of treating a high ceiling for example,
this radius of action can be insufficient.
[0098] An extension of the abrading machine 100 can therefore be
advantageous.
[0099] To this end, in the embodiment of the abrading machine 100
illustrated in FIGS. 1 to 10, there is provided an extension
element 146 which is fixable to the abrading machine 100 and in
particular to the motor housing 128 of the abrading machine 100 in
releasable manner.
[0100] In particular, the extension element 146 comprises a tubular
bar 148 which preferably forms an extension of the tubular bar 122
of the holding device 110 of the abrading machine 100.
[0101] The tubular bar 122 of the holding device 110 and the
tubular bar 148 of the extension element 146 are preferably aligned
in the assembled state of the extension element 146 on the abrading
machine 100 in such a way that a central axis 150 of the tubular
bar 148 of the extension element 146 runs at least approximately
parallel to the central axis 142 of the tubular bar 122 of the
holding device 110.
[0102] In particular, provision may be made for the central axes
142, 150 to be at least approximately identical and thus form a
common central axis of the tubular bar 122 of the holding device
110 and the tubular bar 148 of the extension element 146.
[0103] Furthermore, the extension element 146 comprises an
attachment section 152 by means of which the extension element 146
is fixable to an attachment section 154 of the motor housing 128 in
releasable manner.
[0104] As can be derived in particular from FIG. 8, the attachment
section 154 of the motor housing 128 is, in particular, in the form
of a recess 156 or gap 158 of the motor housing 128.
[0105] The attachment section 154 comprises the proximal end 124 of
the tubular bar 122 of the holding device 110 of the abrading
machine 100.
[0106] A connector device 160 is arranged at the proximal end 124
of the tubular bar 122 of the holding device 110. A (not
illustrated) suction device and in particular a vacuum cleaner can
be attached to this connector device 160 in order to enable dust
and abraded material arising in the region of the tool head 102 in
operation of the abrading machine 100 to be exhausted and disposed
of through the suction channel 138.
[0107] Furthermore, the attachment section 154 of the motor housing
128 comprises a protuberance 162 which is engageable by means of
the extension element 146 in order to fix the extension element 146
to the motor housing 128 of the abrading machine 100 in releasable
manner.
[0108] Furthermore, the protuberance 162 serves for fixing the
motor housing 128 to the tubular bar 122 of the holding device
110.
[0109] Furthermore, the attachment section 154 of the motor housing
128 comprises at least one holder opening 164.
[0110] In particular, the holder opening 164 is formed between the
motor housing 128 and the tubular bar 122.
[0111] The tubular bar 122 extends, in particular, through the
motor housing 128.
[0112] The holder opening 164 of the attachment section 154 of the
motor housing 128 serves in particular for accommodating a
protuberance 166 of the extension element 146.
[0113] As can be derived in particular from FIGS. 9 and 10, the
extension element 146 comprises an attachment section 152 by means
of which the extension element 146 is arrangeable particularly in
releasable manner on the attachment section 154 of the motor
housing 128.
[0114] In particular, the attachment section 152 of the extension
element 146 is pushable along the central axis 150 of the tubular
bar 148 of the extension element 146 and/or along the central axis
142 of the tubular bar 122 of the holding device 110 of the
abrading machine 100 onto the motor housing 128 of the abrading
machine 100 and is connectible in releasable manner to the motor
housing 128.
[0115] To this end in particular, there is provided a latching
device 170 by means of which the extension element 146 is lockable
to the motor housing 128.
[0116] The latching device 170 comprises two latching elements
172.
[0117] The latching elements 172 are in the form of pushbuttons 174
for example.
[0118] Furthermore, the latching device 170 preferably comprises
two spring elements 176.
[0119] Thereby, the spring elements 176 are preferably associated
with the latching elements 172.
[0120] The latching elements 172 are thus preferably
spring-loaded.
[0121] The latching elements 172 each preferably comprise an
inclined surface 178 which is oriented at an angle to the central
axis 142 and/or to the central axis 150.
[0122] When pushing the extension element 146 onto the attachment
section 154 of the motor housing 128, the latching elements 172 are
deflectable by means of the inclined surfaces 178 without special
manipulation of the latching elements 172 by the user and are
moveable past the protuberances 162 of the attachment section 154
of the motor housing 128.
[0123] The extension element 146 can thus be easily locked to the
motor housing 128 when pushing the extension element 146 onto the
attachment section 154 of the motor housing 128.
[0124] The latching elements 172 in the form of pushbuttons 174 are
preferably additionally designed as unlatching elements 180.
[0125] A latching connection between the extension element 146 and
the motor housing 128 formed by means of the latching device 170
can be unlatched by means of the unlatching elements 180. The
extension element 146 can then be easily removed from the motor
housing 128.
[0126] As can be derived in particular from FIG. 4, the tubular bar
148 of the extension element 146 adjoins the connector device 160
of the tubular bar 122 of the holding device 110 of the abrading
machine 100 in the assembled state of the extension element
146.
[0127] The tubular bars 148, 122 are thus connected to one another
in fluid-conveying manner.
[0128] The tubular bar 148 of the extension element 146 can thus
form an extension channel 182 for the suction channel 138 of the
abrading machine 100.
[0129] For example, a connection of the tubular bars 148, 122 can
be effected by means of an adapter element 183 in such a way that
no dust or abraded material can emerge between the tubular bars
148, 122 and also no additional ambient air can be sucked-in in
this region.
[0130] At an end 184 of the extension element 146 remote from the
attachment section 152 of the extension element 146 and in
particular at an end of the tubular bar 148 of the extension
element 146, there is preferably provided a connector device 186 to
which a (not illustrated) suction device and in particular a vacuum
cleaner is connectible in order to enable dust and abraded material
developing in the region of the tool head 102 to be sucked through
the suction channel 138 of the abrading machine 100 and the
extension channel 182 of the extension element 146 and then
disposed of.
[0131] The attachment section 154 of the motor housing 128, the
attachment section 152 of the extension element 146, the tubular
bar 148 and/or the connector device 186 are preferably electrically
conductive at least in sections thereof. In particular for the case
where earthing via the suction device fails when the abrading
machine 100 is in use, the suction device can preferably then be
earthed by means of the extension element 146 via an earthing wire
of the abrading machine 100. This thereby effectively prevents a
user from getting an electrical shock due to a static charge on the
components of the abrading machine 100.
[0132] As can be derived in particular from FIGS. 1, 2, 5 and 6,
the motor housing 128 and the attachment section 152 of the
extension element 146 are formed in such a way that they complement
each other to form a uniform entity.
[0133] In particular, the attachment section 152 of the extension
element 146 is formed in such a way that it fills out or completes
the recess 156 or gap 158 of the attachment section 154 of the
motor housing 128.
[0134] The motor housing 128 and the attachment section 152 of the
extension element 146 are formed in such a way that the surfaces
188 of the side walls 190, the bottom walls 192 and/or the rear
walls 194 of the motor housing 128 and those of the attachment
section 152 of the extension element 146 adjoin one another in such
a way that they are at least approximately flush.
[0135] Preferably, the surfaces 188 of the side walls 190, the
bottom wall 192 and/or the rear wall 194 of the attachment section
152 of the extension element 146 are substantially constant
continuations of the surfaces 188 of the side walls 190, the bottom
wall 192 and/or the rear wall 194 of the motor housing 128.
[0136] In particular, the attachment section 152 of the extension
element 146 completes an outer contour 196 of the motor housing
128.
[0137] As can be derived in particular from FIG. 5, the attachment
section 152 of the extension element 146 is formed in such a way
that, on three sides for example, it forms a section of the outer
contour 196 namely, within the region of the side walls 190 and the
bottom wall 192, but preferably does not protrude beyond the side
walls 190 and the bottom wall 192 of the motor housing 128 in a
plane taken perpendicularly to the central axis 142 of the tubular
bar 122.
[0138] The abrading machine 100 illustrated for example in FIG. 7
can be extended by means of the extension element 146 illustrated
in e.g. FIG. 9 as follows:
[0139] The extension element 146 together with its attachment
section 152 are pushed along the central axes 142, 150 onto the
attachment section 154 of the motor housing 128.
[0140] In connection therewith, due to the inclined surfaces 178,
the latching elements 172 of the latching device 170 are moved
outwardly and past the protuberances 162 of the attachment section
154 of the motor housing 128 until they latch behind the
protuberances 162 so that the extension element 146 is then fixed
to the abrading machine 100 and in particular to the motor housing
128 of the abrading machine 100.
[0141] When pushing the extension element 146 onto the abrading
machine 100, the protuberance 166 is introduced into the holder
opening 164 at the same time. In particular, tilting of the tubular
bars 148, 122 relative to each other can be effectively prevented
due to the fixing of the protuberance 166 in the holder opening
164.
[0142] Likewise, when pushing the extension element 146 onto the
motor housing 128 of the abrading machine 100, the tubular bars
148, 122 are positioned relative to each other and are
interconnected by means of the adapter element 183 particularly in
fluid-tight manner in such a way that an extension channel 182 for
the suction channel 138 of the abrading machine 100 is formed by
means of the extension element 146.
[0143] In the assembled state of the extension element 146 on the
abrading machine 100 that is illustrated in FIG. 1, a user of the
abrading machine 100 can reach a work area that is further away
from the user with the tool head 102.
[0144] To this end, the user takes hold of the handle element 132
on the one hand and an engagement region 198 of the tubular bar 148
of the extension element 146 on the other.
[0145] In particular, high ceilings can then be treated in an easy
and comfortable manner by means of the extended abrading machine
100.
[0146] For the purposes of removing the extension element 146 from
the motor housing 128, the user actuates the unlatching elements
180 in the form of pushbuttons 174. The latching elements 172
thereby disengage from the protuberances 162 on the attachment
section 154 of the motor housing 128 so that the extension element
146 can be removed from the attachment section 154 of the motor
housing 128 along the central axes 150, 142.
[0147] The abrading machine 100 is then particularly suitable for
treating a nearby region and, in addition, can be particularly
compactly stowed away due to the dismantled extension element
146.
LIST OF REFERENCE SYMBOLS
[0148] 100 abrading machine [0149] 102 tool head [0150] 104 tool
holder [0151] 106 tool [0152] 108 swivel device [0153] 110 holding
device [0154] 112 fork element [0155] 114 pivotal axis [0156] 116
swivel element [0157] 118 swivel ring [0158] 120 housing of the
tool head [0159] 122 tubular bar [0160] 124 proximal end [0161] 126
distal end [0162] 128 motor housing [0163] 130 drive motor [0164]
132 handle element [0165] 134 flexible shaft [0166] 136 flexible
tubing element [0167] 138 suction channel [0168] 140 suction
channel section [0169] 142 central axis [0170] 144 engagement
region [0171] 146 extension element [0172] 148 tubular bar [0173]
150 central axis [0174] 152 attachment section [0175] 154
attachment section of the motor housing [0176] 156 recess [0177]
158 gap [0178] 160 connector device [0179] 162 protuberance [0180]
164 holder opening [0181] 166 protuberance [0182] 170 latching
device [0183] 172 latching element [0184] 174 pushbutton [0185] 176
spring element [0186] 178 inclined surface [0187] 180 unlatching
element [0188] 182 extension channel [0189] 183 adapter element
[0190] 184 end [0191] 186 connector device [0192] 188 surface
[0193] 190 side wall [0194] 192 bottom wall [0195] 194 rear wall
[0196] 196 outer contour [0197] 198 engagement region
* * * * *