U.S. patent application number 14/232478 was filed with the patent office on 2014-10-02 for device for inserting foundation piles.
This patent application is currently assigned to Krinner Innovation GmbH. The applicant listed for this patent is Klaus Krinner, Martin Thurner. Invention is credited to Klaus Krinner, Martin Thurner.
Application Number | 20140294513 14/232478 |
Document ID | / |
Family ID | 46548468 |
Filed Date | 2014-10-02 |
United States Patent
Application |
20140294513 |
Kind Code |
A1 |
Krinner; Klaus ; et
al. |
October 2, 2014 |
Device for Inserting Foundation Piles
Abstract
A screwing device on a cantilever arm of a construction vehicle
for screwing foundation installations into the ground has a
suspension, a screw head, and an actuator. The actuator can be
pivoted about two axes extending parallel to one another and
transversely with respect to the longitudinal axis of the screw
head. The articulation point on the screw head follows the motion
of the pivoting lever on the longitudinal axis due to a migration
of the articulation point from the longitudinal axis of the screw
head occurring due to pivoting of the pivoting lever about the axes
while screwing the foundation installation into the ground. The
axes extend transverse to the longitudinal direction of the
cantilever arm and are supplemented by at least one additional axis
supported transversely with respect to said axes. This compensates
for a migration of the articulation point in each direction.
Inventors: |
Krinner; Klaus;
(Strasskirchen, DE) ; Thurner; Martin;
(Strasskirchen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Krinner; Klaus
Thurner; Martin |
Strasskirchen
Strasskirchen |
|
DE
DE |
|
|
Assignee: |
Krinner Innovation GmbH
Strasskirchen
DE
|
Family ID: |
46548468 |
Appl. No.: |
14/232478 |
Filed: |
July 20, 2012 |
PCT Filed: |
July 20, 2012 |
PCT NO: |
PCT/EP2012/064297 |
371 Date: |
April 11, 2014 |
Current U.S.
Class: |
405/232 |
Current CPC
Class: |
E02D 5/36 20130101; E02D
7/22 20130101; E02D 5/56 20130101 |
Class at
Publication: |
405/232 |
International
Class: |
E02D 7/22 20060101
E02D007/22 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 25, 2011 |
DE |
10 2011 079 749.1 |
Claims
1. A screwing device for screwing foundation installations or the
like into the ground as an attachment apparatus for attaching to a
cantilever arm of a construction vehicle, said screwing device
having a suspension, by means of which the screwing device can be
articulated on an articulation point of the cantilever arm, and a
screw head connected to the suspension, to which screw head the
foundation installation to be screwed in can be coupled, and an
actuator which is designed as a pivot lever, the actuator is
articulated with its end nearest the cantilever on the articulation
point of the cantilever arm and with its end nearest the screw head
on an articulation point on the screw head and can be pivoted about
parallel axes which extend through the articulation points and
transversely with respect to the longitudinal axis of the screw
head in such a way that, due to a migration of the articulation
point from the longitudinal axis of the screw head occurring due to
pivoting of the pivoting lever about the axes while the foundation
installation is being screwed into the ground, the articulation
point on the screw head follows the motion of the pivoting lever on
the longitudinal axis.
2. The screwing device according to claim 1, wherein the axes are
directed transversely with respect to the longitudinal direction of
the cantilever arm in such a way that it is possible to compensate
for a migration of the articulation point out of the longitudinal
axis of the screw head in the longitudinal direction of the
cantilever arm.
3. The screwing device according to claim 1, wherein the actuator
is pivotable on at least one of its ends about a further axis
extending transversely with respect to the longitudinal axis of the
screw head and transversely with respect to the axes.
4. The screwing device according to claim 1, wherein the actuator
is pivotable on its ends about two further axes which are parallel
to one another and extend transversely with respect to the
longitudinal axis of the screw head and transversely with respect
to the axes such a way that it is possible to compensate for a
migration of the articulation point of the suspension out of the
longitudinal axis of the screw head in any direction which occurs
as the foundation installation is being screwed into the
ground.
5. The screwing device according to claim 3, wherein one or both of
the pairs of axes is or are designed as universal joints.
6. The screwing device according to claim 2, wherein the actuator
has a rocker.
7. The screwing device according to claim 1, wherein at least one
drive is provided for the pivoting of the actuator.
8. The screwing device according to claim 7, wherein the at least
one drive has a controlling/regulating arrangement by means of
which it is possible to compensate for the migration of the
articulation point out of the longitudinal axis of the screw
head.
9. The screwing device according to claim 8, wherein the
compensation takes place automatically by means of a control
circuit which can be controlled mechanically or electrically.
10. The screwing device according to claim 8, wherein the actuator
has at least one tilt switch or a gyroscopic sensor from which the
signals can be delivered to the drive by means of the
controlling/regulating arrangement.
11. An excavator with a screwing device according to claim 1,
wherein the articulation point forms one of the axes of the
actuator.
12. The excavator according to claim 11, wherein the screwing
device is connected securely and/or undetachably to the
excavator.
13. The screwing device according to claim 1, wherein the
articulation point upon which the screwing device can be
articulated is on a conventional quick coupling.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is the U.S. National Stage of International Patent
Application No. PCT/EP2012/064297, which has an international
filing date of Jul. 20, 2012, and claims priority benefit of German
patent application no. 10 2011 079749.1, filed Jul. 25, 2011. The
entire contents of each of the foregoing are hereby incorporated
herein by reference.
FIELD OF THE DISCLOSURE
[0002] The present disclosure relates to a screwing device for
screwing foundation installations or the like into the ground as an
attachment apparatus for attaching to the cantilever arm of a
construction vehicle, as well as an excavator with such a screwing
device.
BACKGROUND
[0003] Such screwing device are known per se. They exist as
independent, for instance also self-propelled equipment with all
necessary guides (gripping and aligning possibilities) and drives.
As such they are appropriate and very comfortable, but
comparatively complex. They are only profitable where a large
number of foundation installations are to be used continuously.
[0004] For users with only occasional requirements such screwing
devices actually only come into consideration as additional devices
for attaching to the known multifunctional construction vehicle
such as for example on the cantilever arm of an excavator into
consideration. Only then are they financially viable for such
users. One such additional device is described in U.S. Pat. No.
6,942,430 B1.
[0005] In the known apparatus, however, it is difficult to maintain
the required screwing direction, whether it be perpendicular or
another desired angle, actually over the entire drilling
operation.
[0006] This is because the cantilever arm is lowered as the
screwing operation proceeds. The articulation point of the tool on
the cantilever arm follows a circular line around the pivot axis of
the cantilever arm on the excavator. This means that, when no
correction takes place, the drilling tool and with it the drill in
its upper part follows the articulation point and is pushed in the
longitudinal direction of the excavator arm out of the intended
direction, so that the borehole can be changed in its direction or
is extended to a possibly unwanted extent.
[0007] A similar alignment error is obtained in the case of lateral
alignment, when the longitudinal axis of the screwing device is not
aligned with the movement plane of the excavator arm, for instance
because the excavator and with it the cantilever arm (in the case
of a perpendicular screwing direction) are oriented obliquely or
indeed the excavator is oriented upright but the screwing direction
is different from the perpendicular. Superimpositions of this and
the previously described sources of error can lead to erroneous
deflections of the screwing device in every direction.
[0008] To these may be added further sources of error such as for
example resistances in the ground which force the screwing device
out of the intended alignment, and finally operating errors by the
driver of the construction vehicle, such as may also occur in
particular in the attempt to correct the previously described
alignment errors.
[0009] In fact, according to the prior art the described
misalignments are predominantly compensated for by means of the
steering of the construction vehicle or of the cantilever arm, as
depending upon the situation the vehicle driver drives the
construction vehicle forwards or backwards or turns it or shortens,
extends or pivots the cantilever arm.
[0010] However, this procedure itself conceals considerable
inherent sources of errors, because the type and extent of the
correction is dependent upon the judgment of the operator and upon
the precision of his steering movements or also the technology
(precision of the control). It is obvious that, above all in the
case of driving movements on rough land and with devices designed
for this operation this precision often leaves something to be
desired.
[0011] A partial solution to these problems is offered by U.S. Pat.
No. 3,746,104. There the cantilever arm of a drilling device can be
adjusted in length hydraulically. As a result the directional
corrections by driving the construction vehicle forwards and
backwards are omitted, which are otherwise necessary, for example
in order during lowering of the cantilever arm to prevent the
migration of the articulation point out of the longitudinal axis
the drilling device. The necessary correction takes place through
the hydraulic alteration in length of the cantilever arm, instead
of only through driving movements which are difficult to control
precisely. However, this only solves the problem of the alignment
errors in the longitudinal direction of the cantilever arm and even
then does not solve it completely. When the cantilever arm assumes
an angle other than a right angle to the direction of introduction
of the drill, any alteration in length of the cantilever arm is at
the same time associated with an alteration in terms of height.
This leads--depending upon the direction of movement--to an
unwanted tearing out or pressing in of the drill. In this solution
other alignment errors must in any case be further compensated for
by corresponding driving movements of the excavator, if need be by
pivoting movements of the excavator assembly, with all the
associated disadvantages, or it may not even be possible to
compensate for them and they must be taken into account. Above all,
however, this solution is also very complex, because it requires a
cantilever arm which is completely different from the conventional
one.
[0012] Another partial solution to the problem is disclosed by AT
387 424 B, in which the gimbal suspension of a drilling device is
combined with hydraulic longitudinal adjustability thereof and so
avoids movements of the cantilever arm and the problems associated
therewith.
[0013] However, this subject matter also only avoids the problems
resulting from movements of the cantilever arm. For other alignment
errors which require readjustment of the device the document offers
no solution. Here too the only options are the readjustment by
means of driving movements of the construction device or adjusting
movements of the cantilever arm or taking account of
misalignments.
[0014] Furthermore this device is very complex and can hardly be
considered above all for long foundation installations because it
would require a height of the cantilever arm which is hardly
available in the usual construction vehicles.
[0015] In order to solve these problems the applicant has proposed
in DE 10 2008 022 478 a screwing device for foundation
installations as an attachment apparatus which avoids or corrects
alignment errors during screwing in a simple manner in that its
articulation point on the cantilever arm is designed to be
displaceable with respect to the screw head in at least a first
direction transversely with respect to the longitudinal axis of the
foundation installation, if appropriate also in a second direction
transversely with respect to the first direction.
[0016] As a result the articulation point on the cantilever arm
acquires the freedom to move, at least in the first direction, if
appropriate also in the second direction and in this case in any
direction due to the superimposition of the two movement options,
away from the axis of the foundation installation without thereby
acting laterally on the foundation installation and forcing it out
of alignment.
[0017] Therefore the compensation here does not take place in the
cantilever arm and not by alteration of the length thereof, but in
the screwing device, more precisely at any location between the
articulation point thereof on the cantilever arm and the screw
head.
[0018] The error compensation here no longer necessitates
conversion of the construction vehicle or its cantilever arm and
also no longer has to take place by the highly inadequate means of
steering of the construction vehicle. The compensation takes place
in an additional part, which is in any case present, of the
screwing device, namely its suspension. This reconfiguration is
relatively compact, for example by comparison with the known
hydraulic longitudinal adjustability of a drilling device. Above
all, however, if the displacement is to take place in a driven and
controlled manner, it can be carried out by (hydraulic) drives and
controls thereof which are in any case provided in modern
construction vehicles and are reserved for the additional
equipment. Thus the displacement can be controlled manually by the
operator in the simplest way.
[0019] As a particularly simple and structurally compact embodiment
it is proposed in this connection to construct the suspension--as
is known for drilling devices--as a universal joint and to lengthen
one or both joint axes in such a way that they--and with them the
articulation point and the screwing device--are displaceable with
respect to one another.
[0020] This solution has proved successful in practice. However, a
disadvantage of this solution is that it cannot be achieved with
standard components--such as for instance with standard joints, in
particular with standard universal joints--but the design requires
appropriately shaped special joint parts which are moreover bulky
and non-uniform, and accordingly heavy, complex in structure and
therefore expensive and also require intensive maintenance and are
prone to malfunction.
[0021] This gives rise to the object of implementing the decoupling
of the screwing device from disruptive incorrect positions or
incorrect movements of the construction vehicle or of the excavator
in a simpler manner which is more cost-effective, less prone to
malfunction and easier to maintain.
GENERAL DESCRIPTION
[0022] This object is achieved by the screwing device according to
the present disclosure and an excavator with a corresponding
screwing device.
[0023] This differs from the prior art in that the suspension, by
means of which the screwing device can be articulated on the
articulation point of the cantilever arm--optionally also by means
of a conventional quick coupling--has an actuator which is designed
as a pivot lever and can be pivoted at the end thereof nearest the
screw head and at the end thereof nearest the cantilever--in the
simplest case--about two first axes which extend parallel to one
another and transversely with respect to the longitudinal axis of
the screw head, in such a way that a migration of the articulation
point at the cantilever end from the longitudinal axis of the screw
head can be compensated for. That means that, due to the migration
of the articulation point nearest the cantilever from the
longitudinal axis of the screw head occurring due to pivoting of
the pivoting lever about the axes while the foundation installation
is being screwed into the ground, the articulation point nearest
the screw head follows the motion of the pivoting lever on the
longitudinal axis.
[0024] Since the main direction of the migration of the
articulation point out of the longitudinal axis of the screw head
is usually the longitudinal direction of the cantilever arm and
therefore possibly in some cases actually only this deflection
requires a correction, as a rule these first axes will be directed
transversely with respect to the longitudinal direction of the
cantilever arm in such a way that precisely this migration of the
articulation point out of the longitudinal axis of the screw head
in the longitudinal direction of the cantilever arm can be
compensated for.
[0025] If it is desired to compensate for incorrect positions or
incorrect movements of the articulation point also in another
direction, for instance in the direction transversely with respect
to the longitudinal direction of the cantilever arm, then this can
be taken into account in that the actuator is designed to be
pivotable on at least one of its ends additionally about a further
axis extending transversely with respect to the longitudinal axis
of the screw head and transversely with respect to the first
axes.
[0026] If a complete decoupling of the screwing device from
incorrect positions or incorrect movements of the articulation
point is desired, then the actuator is designed to be pivotable on
both its ends about two further axes extending parallel to one
another, transversely with respect to the longitudinal axis of the
screw head and transversely with respect to the first axes.
[0027] In this case there would have to be compensation for not
only a migration of the articulation point out of the longitudinal
axis of the screw head in the longitudinal direction of the
cantilever arm and/or transversely with respect thereto. Instead,
because of the possibility of superimposition of the two movement
options any directional deviation should be compensated for.
[0028] In terms of design the simple solution would be that the one
pair of axes provided on one end of the actuator or the pairs of
axes provided on both ends of the actuator are constructed as
universal joints.
[0029] This solution, which instead of a displaceability of the
parts with respect to one another is based on a simple pivot lever
construction, has considerable advantages over the prior art: It
simplifies the compensation for possible directional errors with
respect to the solution according to DE 10 2008 022 478 without
giving up the advantages set out there. The design according to the
present disclosure is of significantly simpler design than that of
DE 10 2008 022 478. It operates with a simple actuator in the form
of a pivot lever and simple joints, such as are commercially
available as standard.
[0030] This applies in particular in so far as according to the
present disclosure standard universal joints can be used which do
not necessitate costly adaptation, not even any reconstruction,
such as is necessary according to the embodiment according to the
prior art. In addition, in these standard universal joints the
susceptibility to malfunction and intensive maintenance
requirements is significantly reduced relative to the special
constructions according to the citation, which plays a particularly
important part in rough operating conditions in earth works.
[0031] The actuator may have a rocker. This ensures particularly
precisely guiding of the screwing device.
[0032] The pivoting of the actuator may take place manually.
Preferably, however, at least one drive can be provided
therefor.
[0033] This at least one drive can have a controlling/regulating
arrangement by means of which the migration of the articulation
point out of the longitudinal axis of the screw head can be
detected and can be compensated for.
[0034] This can take place automatically by means of a control
circuit which can be controlled mechanically or electrically.
[0035] For example, the actuator may have at least one tilt switch
or a gyroscopic sensor from which the signals can be delivered to
the drive by means of the controlling/regulating arrangement.
[0036] If the screwing device is also regarded as a device which is
independent of the construction device, then this does not exclude
the possibility that both have a common axis and this common axis
at the same time forms the articulation point and one of the axes
of the actuator.
[0037] If the device according to the present disclosure is also
provided in principle as an attachment apparatus for construction
vehicles which are designed for a change of attachment, then in the
same way the use thereof as a fixed equipment attachment, for
instance on an excavator only operated with this attachment, may be
considered. Then it would be appropriate to connect the screwing
device securely to the excavator, i.e. so as to be undetachable in
operation, in such a way that they form a unit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0038] The present disclosure is described in detail below with
reference to the drawings. In the drawings:
[0039] FIG. 1 shows an excavator 5 with cantilever 4 in three
different working positions, such as occur during the screwing in
of a screwed foundation 2;
[0040] FIG. 2 shows a screwing device according to the present
disclosure;
[0041] FIG. 3 shows the device according to FIG. 2 in detail;
[0042] FIG. 4 shows a further embodiment of the device according to
FIG. 2;
[0043] FIG. 5 shows a further detail of the device according to the
present disclosure.
DETAILED DESCRIPTION
[0044] FIG. 1 shows, as an explanation of the problem which occurs
with such devices, an excavator 5 with cantilever 4 in three
different working positions such as occur during the screwing in of
a screw foundation 2.
[0045] A straight line "A", shown as a dash-dot line, indicates a
desired screwing direction of a screw foundation 2 which during the
screwing operation should be maintained in alignment with the
longitudinal axis 12 of the screw head 8 and thus at the same time
with the longitudinal axis of the foundation installation to be
screwed in.
[0046] A circular line "B" indicates the line on which the
articulation point 7 of the foundation installation 2 moves on the
cantilever arm 4 during lowering of the cantilever 4 as the
screwing operation proceeds, if this movement is not corrected. A
sine curve "C" shows by way of example a sequence of movements for
the articulation point 7 in the case where the operator attempts to
prevent the migration of the articulation point 7 out of the line A
by steering movements am excavator or by alteration in the length
of the cantilever arm.
[0047] The illustration makes it clear that completely trouble-free
screwing in of the foundation installation 2 whilst preventing
erroneous deflections caused by lateral forces is not reliably
possible. This is the starting point for the present disclosure, as
FIG. 2 shows.
[0048] FIG. 2 shows a screwing device 1 according to the present
disclosure with the foundation installation 2 attached to the screw
head 8 thereof and already partially introduced into the ground 3.
The suspension 6 of the screwing device 1 is articulated on the
articulation point 7 of a cantilever arm 4. In this connection the
suspension 6 has an actuator 9 constructed as a pivot lever which
is articulated with its end 10 nearest the screw head on the screw
head 8 and with its end 11 nearest the cantilever on the
articulation point 7. Both articulations are disposed as axes 13a
and 13b parallel to one another and transversely with respect to
the longitudinal axis 12 of the screw head 8 in such a way that the
actuator with its end 11 nearest the cantilever and the axis 13a
can follow the movement of the articulation point 7 on the circular
line B which occurs during screwing, whilst with its end 10 nearest
the screw head and the axis 13b on its articulation point 20
nearest the screw head said actuator follows the movement of the
screw head 8 on the straight line A or the longitudinal axis 12 of
the screw head 8.
[0049] With this device it is possible to compensate for the
migration of the articulation point 7 out of the longitudinal axis
12 of the screw head in one direction. Since the migration is
primarily due to the lowering of the cantilever arm, it is normally
this for which compensation is primarily required. The is achieved
in that the pair of axes 13a, b is oriented transversely with
respect to the longitudinal direction 14 of the cantilever arm
4.
[0050] In order to compensate for incorrect positions of the
cantilever arm 4 in the lateral direction (transversely with
respect to the first direction, that is to say generally
transversely with respect to the longitudinal direction 14 of the
cantilever arm 4), the actuator 9 can be mounted at one of its
ends, but optionally also at both of its ends, so as to be
pivotable in each case about a further axis 15a and 15b extending
transversely with respect to the longitudinal axis 12 of the screw
head 8 and transversely with respect to the axles 13a and 13b
and/or on the screw head 8.
[0051] If this is ensured--for example by a universal joint at each
end of the actuator 9--it is possible to compensate for any
relative movement between the articulation point 7 and the screw
head 8 produced during screwing.
[0052] FIG. 3 shows a detail of the device according to the present
disclosure as shown in FIG. 2. This shows the cantilever arm 4 with
its articulation point 7, on which the actuator 9 is articulated as
part of the suspension 6 with its end 11 nearest the cantilever
with the axis 13a. It also shows the articulation of the screw head
8 on the end 10 of the actuator 9 nearest the screw head with the
axis 13b. The further axis 15b is also indicated.
[0053] Unlike in FIG. 2, in which the axles 13a and b intersect the
longitudinal axis 12 of the screw head 8, FIG. 3 shows a position
of the device in which the articulation point 7 is located far
outside the axis 12 of the screw head 8, whilst the articulation
point 20 lies on the axis 12.
[0054] FIG. 4 shows a further embodiment of the device according to
the present disclosure as shown in FIG. 2. This differs from the
embodiment according to FIG. 2 in that here the articulation point
7 is indicated on a conventional quick coupling.
[0055] Moreover it is shown here, by way of indication, how an
actuator configured as a rocker 16 brings about the compensation
for the deviation between the articulation point 7 and the screw
head 8 by means of a suitable drive 17 with control 18, for
instance a tilt switch or gyroscopic sensor 19.
[0056] FIG. 5 shows in a further detail the articulation of the
screw head 8 on the articulation point 20 on the end 10 of the
actuator 9 nearest the screw head by means of axes 13b and 15b
disposed at right angles with respect to one another.
* * * * *