U.S. patent application number 14/648871 was filed with the patent office on 2015-10-22 for boom assembly for construction machines.
This patent application is currently assigned to Caterpillar Inc.. The applicant listed for this patent is CATERPILLAR INC.. Invention is credited to Nicolas GRANDJANNY, Jason LAFONT, Jean-Francois VILLARD, Sven VOSS.
Application Number | 20150299979 14/648871 |
Document ID | / |
Family ID | 47720541 |
Filed Date | 2015-10-22 |
United States Patent
Application |
20150299979 |
Kind Code |
A1 |
VOSS; Sven ; et al. |
October 22, 2015 |
BOOM ASSEMBLY FOR CONSTRUCTION MACHINES
Abstract
A boom assembly for a construction machine is disclosed. The
boom assembly may have a first side barrier and a second side
barrier spaced apart from each other. The first and second side
barriers may have a first pin receiving groove and a second pin
receiving groove, respectively. The boom assembly may have a boom
including a pin receiving bore. The boom assembly may also have a
boom mounting pin extending through the pin receiving bore, the
first pin receiving groove, and the second pin receiving groove.
Further, the boom assembly may have a first mounting member mounted
on the boom mounting pin at the first pin receiving groove and
being removably attached to the first side barrier. In addition,
the boom assembly may have a second mounting member mounted on the
boom mounting pin at the second pin receiving groove and being
removably attached to the second side barrier.
Inventors: |
VOSS; Sven; (Regensburg,
DE) ; VILLARD; Jean-Francois;
(Saint-Etienne-de-Saint-Geoirs, FR) ; LAFONT; Jason;
(Voreppe, FR) ; GRANDJANNY; Nicolas; (Ambert,
FR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
CATERPILLAR INC. |
Peoria |
IL |
US |
|
|
Assignee: |
Caterpillar Inc.
Peoria
IL
|
Family ID: |
47720541 |
Appl. No.: |
14/648871 |
Filed: |
December 3, 2012 |
PCT Filed: |
December 3, 2012 |
PCT NO: |
PCT/IB2012/002960 |
371 Date: |
June 1, 2015 |
Current U.S.
Class: |
414/686 ;
29/525.08 |
Current CPC
Class: |
E02F 9/006 20130101;
E02F 3/382 20130101 |
International
Class: |
E02F 3/38 20060101
E02F003/38; E02F 9/00 20060101 E02F009/00 |
Claims
1. A boom assembly for a construction machine, comprising: a first
side barrier including a first pin receiving groove; a second side
barrier being spaced apart from the first side barrier for defining
a boom mounting portion therebetween and including a second pin
receiving groove; a boom including a pin receiving bore and being
disposed within the boom mounting portion, the pin receiving bore
being aligned with the first pin receiving groove and the second
pin receiving groove; a boom mounting pin extending through the pin
receiving bore, the first pin receiving groove, and the second pin
receiving groove; a first mounting member mounted on the boom
mounting pin at the first pin receiving groove and being removably
attached to the first side barrier; and a second mounting member
mounted on the boom mounting pin at the second pin receiving groove
and being removably attached to the second side barrier.
2. The boom assembly of claim 1, wherein the second mounting member
is integrally formed with the second side barrier at the second pin
receiving groove, thereby forming a pin receiving bore.
3. The boom assembly of claim 1, wherein at least one of the first
mounting member and the second mounting member includes a groove
corresponding to the shape of the boom mounting pin.
4. The boom assembly of claim 1, wherein the boom mounting pin
includes a flat portion on at least at one end portion.
5. The boom assembly of claim 1, wherein the boom mounting pin
includes a first end portion having a first diameter and a second
end portion opposite to the first end and having a second diameter,
the first diameter being unequal to the second diameter.
6. The boom assembly of claim 1, wherein the boom mounting pin
includes a first end portion having a first diameter, a second end
portion opposite to the first end portion and having the first
diameter, and an intermediate portion having a third diameter, the
first diameter being unequal to the third diameter.
7. The boom assembly of claim 1, wherein at least one of the first
mounting member and the second mounting member is removably
attached to the first side barrier and the second side barrier by
at least one screw.
8. The boom assembly of claim 1, wherein the boom includes a width
substantially corresponding to the boom mounting portion.
9. A superstructure of a construction machine, comprising: a first
side barrier including a first in receiving groove; a second side
barrier being spaced apart from the first side barrier for defining
a boom mounting portion therebetween and including a second in
receiving groove; a boom including a in receiving bore and being
disposed within the boom mounting portion, the in receiving bore
being aligned with the first in receiving groove and the second in
receiving groove; a boom mounting in extending through the in
receiving bore, the first in receiving groove, and the second in
receiving groove; a first mounting member mounted on the boom
mounting pin at the first pin receiving groove and being removably
attached to the first side barrier; and a second mounting member
mounted on the boom mounting pin at the second pin receiving groove
and being removably attached to the second side barrier.
10. The superstructure of claim 9, further comprising at least one
boom actuator configured to raise or lower the boom.
11. The superstructure of claim 10, wherein one end of the at least
one boom actuator is attached to either the first side barrier or
the second side barrier and the other end of the at least one boom
actuator is attached to the boom.
12. A method for assembling a boom assembly, the boom assembly
comprising a first side barrier including a first pin receiving
groove and a second side barrier being spaced apart from the first
side barrier for defining a boom mounting portion therebetween, the
second side barrier including a second pin receiving groove aligned
with the first pin receiving groove, the method comprising:
inserting a boom mounting pin into a pin receiving bore of a boom,
such that the boom mounting pin at least partially protrudes out of
the pin receiving bore on both sides; positioning the boom within
the boom mounting portion, such that the boom mounting pin is at
least partially accommodated by the first pin receiving groove and
the second pin receiving groove; mounting a first mounting member
on the boom mounting pin at the first pin receiving groove and
removably attaching the first mounting member to the first side
barrier; and mounting a second mounting member on the boom mounting
pin at the second pin receiving groove and removably attaching the
second mounting member to the second side barrier.
13. The method of claim 12, wherein the second mounting member is
integrally formed with the second side barrier thereby forming a
pin receiving bore, the method further comprising: sliding the boom
mounting pin into the barrier bore.
14. A boom assembly comprising: a first side barrier; a second side
barrier being spaced apart from the first side barrier, the first
side barrier and the second side barrier defining a boom mounting
portion therebetween; a boom comprising a pin receiving bore and
being disposed within the boom mounting portion, a boom mounting
pin extending through the pin receiving bore and configured to at
least partially protrude out of the pin receiving bore on both
sides; a first mounting member mounted on the boom mounting pin at
a first protruding side, the first mounting member being removably
attached to the first side barrier; and a second mounting member
mounted on the boom mounting pin at a second protruding side
opposite to the first protruding side, the second mounting member
being removably attached to the second side barrier.
15. A boom assembly, comprising: a first side barrier including a
first pin receiving bore; a second side barrier being spaced apart
from the first side barrier, the first side barrier and the second
side barrier defining a boom mounting portion therebetween, the
second side barrier including a second pin receiving bore aligned
with the first pin receiving bore; a boom disposed within the boom
mounting portion and comprising a boom receiving groove aligned
with the first pin receiving bore and the second pin receiving
bore; a boom mounting pin extending through the first pin receiving
bore, the second pin receiving bore and the pin receiving groove;
and a boom mounting member mounted on the boom mounting pin at the
pin receiving groove and removably attached to the boom.
16. The boom assembly of claim 14, wherein the boom mounting pin
includes a flat portion on at least at one of its end portions.
17. The boom assembly of claim 14, wherein the boom mounting pin
includes a first end portion having a first diameter and a second
end portion opposite to the first end having a second diameter, the
first diameter being unequal to the second diameter.
18. The boom assembly of claim 14, wherein the boom mounting pin
includes a first end portion having a first diameter, a second end
portion opposite to the first end portion and having the first
diameter, and an intermediate portion having a third diameter, the
first diameter being unequal to the third diameter.
19. The boom assembly of claim 15, wherein the boom mounting pin
includes a flat portion on at least at one of its end portions.
20. The boom assembly of claim 15, wherein the boom mounting pin
includes a first end portion having a first diameter, a second end
portion opposite to the first end portion having the first
diameter, and an intermediate portion having a third diameter, the
first diameter being unequal to the third diameter.
Description
TECHNICAL FIELD
[0001] The present disclosure generally relates to a boom assembly
of a construction machine and to a method of mounting a boom to a
construction machine.
BACKGROUND
[0002] Construction machines, such as wheeled or crawler
excavators, wheel loaders, backhoes, or the like, may be provided
with a boom and a stick for accommodating a work tool, such as a
bucket, for executing specific operations.
[0003] It is common to operably mount the boom to the construction
machine via a boom mounting pin extending through corresponding
bores at the chassis of the construction machine and the boom.
[0004] US 2006/0275074 A1 discloses a linkage pin including a
mechanical deformation to form a joint, wherein the components are
arranged in a particular orientation to provide optimum
durability.
[0005] A loader attachment pivot pin assembly is known from U.S.
Pat. No. 6,694,571 B2. The pivot pin assembly is formed by
providing a cylindrical pin portion with a boss at one end, which
has a flat shoulder surface, so that its periphery is
non-circular.
[0006] U.S. Pat. No. 5,630,673 A discloses a pivot joint assembly
that mounts a first member to a second member for relative rotation
therebetween. The first member is positioned between a pair of
brackets defined by the second member and both members define a
plurality of bores aligned on common axis.
[0007] The present disclosure is directed, at least in part, to
improving or overcoming one or more aspects of prior systems.
SUMMARY OF THE DISCLOSURE
[0008] According to an aspect of the present disclosure, a boom
assembly for a construction machine may comprise a first side
barrier including a first pin receiving groove, and a second side
barrier being spaced apart the first side barrier for defining a
boom mounting portion therebetween. The second side barrier
includes a second pin receiving groove. A boom may include a pin
receiving bore and may be disposed within the boom mounting
portion, such that the pin receiving bore may be aligned with the
first pin receiving groove and the second pin receiving groove. A
boom mounting pin may extend through the pin receiving bore, the
first pin receiving groove and the second pin receiving groove. A
first mounting member may be mounted on the boom mounting pin at
the first pin receiving groove and may be removably attached to the
first side barrier, and a second mounting member may be mounted on
the boom mounting pin at the second pin receiving groove and may be
removably attached to the second side barrier.
[0009] According to another aspect of the present disclosure, a
method for assembling a boom assembly is disclosed. The boom
assembly may comprise a first side barrier including a first pin
receiving groove and a second side barrier being spaced apart the
first side barrier for defining a boom mounting portion
therebetween, wherein the second side barrier may include a second
pin receiving groove aligned with the first pin receiving groove.
The exemplary disclosed method may comprise inserting a boom
mounting pin into a pin receiving bore of a boom, such that the
boom mounting pin at least partially protrudes out of the pin
receiving bore on both sides, positioning the boom within the boom
mounting portion, such that the boom mounting pin is at least
partially accommodated by the first pin receiving groove and at
least partially by the second pin receiving groove. The method may
further comprise mounting a first mounting member on the boom
mounting pin at the first pin receiving groove and removably
attaching the first mounting member to the first side barrier, and
mounting a second mounting member on the boom mounting pin at the
second pin receiving groove and removably attaching the second
mounting member to the second side barrier.
[0010] According to another aspect of the present disclosure, a
boom assembly may comprise a first side barrier, a second side
barrier being spaced apart the first side barrier for defining a
boom mounting portion therebetween, a boom comprising a pin
receiving bore and being disposed within the boom mounting portion,
a boom mounting pin extending through the pin receiving bore and
configured to at least partially protrude out of the pin receiving
bore on both sides, a first mounting member mounted on the boom
mounting pin at a first protruding side, and a second mounting
member mounted on the boom mounting pin at a second protruding side
opposite to the first protruding side. The first mounting member
may be removably attached to the first side barrier and the second
mounting member may be removably attached to the second side
barrier.
[0011] According to another aspect of the present disclosure, a
boom assembly may comprise, a first side barrier including a first
pin receiving bore, a second side barrier being spaced apart the
first side barrier for defining a boom mounting portion
therebetween and including a second pin receiving bore aligned with
the first pin receiving bore, a boom disposed within the boom
mounting portion and comprising a boom receiving groove aligned
with the first pin receiving bore and the second pin receiving
bore, a boom mounting pin extending through the first pin receiving
bore, the second pin receiving bore and the pin receiving groove,
and a boom mounting member mounted on the boom mounting pin at the
pin receiving groove and removably attached to the boom.
[0012] According to another aspect of the present disclosure, a
superstructure of a construction machine may comprise a boom
assembly according to the present disclosure.
[0013] In some embodiments, the second mounting member may be
integrally formed with the second side barrier at the second pin
receiving groove, thereby forming a pin receiving bore. In such
embodiments, the boom mounting pin may extend through the first
mounting groove, the pin receiving bore of the boom, and the pin
receiving bore of the second side barrier.
[0014] Other features and aspects of this disclosure will be
apparent from the following description and the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a side view of a construction machine comprising a
boom;
[0016] FIG. 2 is a top view of the construction machine of FIG. 1
without the boom;
[0017] FIG. 3 is an explosion view of a boom assembly according to
a first embodiment;
[0018] FIG. 4 is an explosion view of a boom assembly according to
a second embodiment;
[0019] FIG. 5 is an explosion view of a boom assembly according to
a third embodiment;
[0020] FIG. 6 is an explosion view of a boom assembly according to
a fourth embodiment;
[0021] FIG. 7 is a front view of an embodiment of a boom mounting
pin; and
[0022] FIG. 8 is a perspective view of a further embodiment of a
boom mounting pin.
DETAILED DESCRIPTION
[0023] The following is a detailed description of exemplary
embodiments of the present disclosure. The exemplary embodiments
described therein and illustrated in the drawings are intended to
teach the principles of the present disclosure, enabling those of
ordinary skill in the art to implement and use the present
disclosure in many different environments and for many different
applications. Therefore, the exemplary embodiments are not intended
to be, and should not be considered as, a limiting description of
the scope of protection. Rather, the scope of patent protection
shall be defined by the appended claims.
[0024] The present disclosure may be based in part on the
realization that inserting a boom mounting pin into a boom and,
subsequently, disposing the boom with the pre-assembled boom
mounting pin into a boom mounting portion of a construction
machine, which provides corresponding pin receiving grooves may
facilitate attachment of the boom to the construction machine.
Particularly, alignments of the pin receiving bore at the boom and
the pin receiving bores at the chassis of the construction machine
may at least partially disappear.
[0025] Referring to FIG. 1, a construction machine 10 as, for
example, a wheeled excavator is shown. The construction machine 10
includes a power source, such as an internal combustion engine 12.
The construction machine 10 further includes a superstructure 14
which is rotatably attached to an undercarriage 16 via a swivel 15.
Alternatively, the superstructure 14 may be fixedly mounted onto
the undercarriage 16 or in any suitable fashion or
configuration.
[0026] The construction machine 10 also includes a traction system
18, for instance a plurality set of wheels 24, 26, which is
operably attached to the undercarriage 16. At least one set of
wheels may be steerable.
[0027] While the traction system 18 has been shown to include
wheels, the present disclosure may also apply to construction
machines or vehicles with one or more endless tracks and/or belts,
or any other type of traction device. In addition, the present
disclosure may apply to steering systems that vary a steering angle
of one or more traction devices, as well as skid steer, and
differential steering systems. Further, these systems may each
apply to work machines with a variety of types of tracks and
devices. For example, while track work machines are commonly
configured with skid-steer or differential steering systems, they
may automatically or additionally be configured with steering
systems that vary a steering angle of one or more tracks.
Similarly, wheeled work machines or vehicles may steer with a
variable steering angle system, skid-steer, and/or differential
steering systems.
[0028] The construction machine 10 shown in FIG. 1 as a wheeled
excavator may be any type of work machine with operator-controlled
steering and travelling. For example, the construction machine 10
may include wheel loaders, motor graders, backhoe loaders, skid
steers, track-type tractors, tracked excavators, material handlers,
cranes, and any other type of work machine with operator-controlled
steering and travelling.
[0029] In some embodiments, the construction machine 10 may include
a cab-raiser function, by which the operator station 14 may be
raised and lowered relative to the undercarriage 16. Alternatively
or additionally, the cab-raiser function may cause the operator
station 22 to be raised and lowered relative to the superstructure
14. The cab-raiser function may be hydraulically actuated.
[0030] The construction machine 10 further includes a work
implement 20 and an operator station 22 from which the work
implement 20 is controlled. The work implement 20 may be any type
of work implement and may include any type of work tool, such as,
for instance, a bucket, blade, grapple, jackhammer, shears,
etc.
[0031] As shown in FIG. 1, the work implement 20 includes a boom
28, a stick 30, and a work tool 32 attached to the end of the stick
30. The boom 28 is pivotably attached to the superstructure 14. At
least one boom actuator 34 is attached to the superstructure 14 and
the boom 28, such that a distal end 36 of the boom 28 is raised and
lowered by actuation of the boom actuator 34.
[0032] The distal end 36 of the boom 28 is also moved side-to-side.
In the exemplary embodiment shown, the boom 28 is moved
side-to-side by rotation of the superstructure 14 relative to the
undercarriage 16 about an axis 38 in a direction indicated by an
arrow 40. The construction machine 10 may also include an offset
boom function by which the boom 28 may be pivoted side-to-side
relative to the superstructure 14.
[0033] The stick 30 is pivotally attached to the boom 28 at a
proximal end 42. A stick actuator 44 is attached to the boom 28 and
the stick 30 such that actuation of the stick actuator 44 causes
the stick 30 to extend and retract with respect to the boom 28 in a
manner of a jackknife. That is, a distal end 46 of the stick 30 is
extended further away from the undercarriage 12, and retracts
closer to the undercarriage 16 by actuating the stick actuator
44.
[0034] The work tool 32 is attached to the distal end 46 of the
stick 30. While the work tool 32 has been illustrated in FIG. 1 as
a bucket 48, the work tool 32 may be any type of work tool. The
work tool 32 is pivotably attached to the distal end 46 of the
stick 30. A work tool pivot actuator 50 is attached to the stick 30
and the work tool 32 such that actuation of the work tool pivot
actuator 50 causes the work tool 32 to pivot relative to the stick
30.
[0035] The boom actuator 34, the stick actuator 44, and the work
tool pivot actuator 50 may be any kind of actuators, such as, for
instance, hydraulic cylinders as shown in FIG. 1. Each hydraulic
cylinder may be associated with its own hydraulic circuit in order
to be independently controlled. Some work tools, such as the bucket
48, may have a single actuator, and thus may be controlled by a
single hydraulic circuit. Other type of work tools, such as grapple
may include more than one actuator, and thus may be controlled by
more than one hydraulic circuit. For example, grapple may be
controlled by two or more hydraulic circuits. One circuit may
control the work tool pivot actuator 50, which may pivot the
grapple in the same manner as it does the bucket 48. Additionally,
a second circuit may control an auxiliary function, such as
rotation of the grapple.
[0036] Referring now to FIG. 2, a top view of the construction
machine 10 of FIG. 1 is illustrated. Specifically, a top view of
the superstructure 14 without an attached boom is shown. The
operator station 22 is depicted from which the operator is able to
control operation of the construction machine 10.
[0037] The construction machine 10 is provided with a boom mounting
portion 60 configured to receive the boom (not explicitly shown in
FIG. 2) and to provide space for moving the boom relative to the
superstructure 14.
[0038] The superstructure 14 may comprise a base frame including a
first side barrier 70 and a second side barrier 80 for
accommodating the boom 28 and the at least one boom actuator 34
(see FIG. 1). As indicated in dotted lines, the first and second
side barriers 70, 80 may extend from the backside of the
construction machine 10 to the front side.
[0039] In the embodiment shown in FIG. 2, the first side barrier 70
comprises a pin receiving groove 72, and the second side barrier 80
comprises a pin receiving bore 82 indicated by dotted lines. The
pin receiving groove 72 and the barrier bore 82 are aligned to each
other (indicated by an axis 62) and configured to accommodate a
boom mounting pin 94 (see, for example, FIG. 3) for mounting the
boom 28 to the base frame of the superstructure 14.
[0040] Referring to FIG. 3, an explosion view of a first embodiment
of a boom assembly 90 is illustrated. The first side barrier 70
provides two mounting surfaces 73, 74 configured to receive a
mounting member 78. Particularly, each of the two mounting surfaces
73, 74 comprise at least one bore 75, 76 configured to receive, for
example, screws configured to removably attach the mounting member
78 to the first side barrier 70. Therefore, the mounting member 78
comprises at least two holes corresponding to the at least two
bores 75, 76.
[0041] In some embodiments, the mounting member 78 may be fixedly
attached to the first side barrier 70 by means of, for instance,
welding, soldering, riveting, adhering, or any other suitable means
known in the art.
[0042] As further shown in FIG. 3, the mounting member 78 may also
comprise a pin receiving groove 79 corresponding to the pin
receiving groove 72 of the first side barrier 70. It is to be
understood that the pin receiving groove 72 and the pin receiving
groove 79 together form a cylindrical opening for accommodating a
boom mounting pin 94.
[0043] The boom 28 comprises a pin receiving bore 92 at its end at
which the boom 92 is mounted to the superstructure 14 (see FIG. 1).
The pin receiving bore 92 is configured to receive the boom
mounting pin 94 via an axis 64. The pin receiving bore 92 may
comprise a diameter substantially corresponding to the diameter of
the boom mounting pin 94.
[0044] The boom mounting pin 94 is further configured to be
disposed within the pin receiving groove 72 and the pin receiving
bore 82, which will be explained in greater detail below. The boom
mounting pin 94 comprises a length of at least the distance between
the first side barrier 70 and the second side barrier 80.
Preferably, the boom mounting pin 94 comprises a length, such that
the boom mounting pin 94 extends from the pin receiving groove 72
across the boom mounting portion 60 into the pin receiving bore
82.
[0045] Referring to FIG. 4, an explosion view of a second
embodiment of the boom assembly 90 is illustrated. The first side
barrier 170 of the second embodiment is identical to the first side
barrier 70 of the first embodiment. The elements of the first side
member 170 are denoted by the same reference signs as the first
side barrier 70, but having a prefixed "1".
[0046] According to the second embodiment, the second side barrier
180 is similar to the first side barrier 170, such that the second
side barrier 180 comprises two mounting surfaces 183,184 configured
to receive a mounting member 188. Particularly, each of the two
mounting surfaces 183, 184 comprise at least one bore 185, 186
configured to receive, for example, screws configured to removably
attach the mounting member 188 to the second side barrier 180.
[0047] Referring to FIG. 5, an explosion view of a third embodiment
of a boom assembly 90 is illustrated. According to the third
embodiment, the first side barrier 270 comprises a first bore 275
and a second bore 276. The first and second bores 275, 276 are
configured to receive, for example, screws configured to fixedly
attach the mounting member 278 to the first side barrier 270. The
second side barrier 280 comprises a first bore 285 and a second
bore 286. The first and second bores 285, 286 are configured to
receive, for example, screws configured to removably attach the
mounting member 288 to the first side barrier 280.
[0048] Each of the mounting members 278, 288 include one pin
receiving bore 272, 282, respectively. The pin receiving bores 272,
282 are aligned to each other (indicated by the axis 62) and
configured to be mounted on the boom mounting pin 94.
[0049] Referring to FIG. 6, an explosion view of a fourth
embodiment of a boom assembly 190 is illustrated. The second side
barrier 380 is identical to the second side barrier 80 of the first
embodiment shown in FIG. 3. Thus, the elements of the second side
member 380 are denoted by the same reference signs as the second
side barrier 80, but having a prefixed "3".
[0050] According to the fourth embodiment, the first side barrier
370 comprises a barrier bore 372 configured to be aligned with the
pin receiving bore 382 of the second side barrier 380 (indicated by
the axis 62) and to receive the boom mounting pin 94.
[0051] The boom 328 of the fourth embodiment comprises a pin
receiving groove 192 configured to accommodate the boom mounting
pin 94. A boom mounting member 395 comprising a pin receiving
groove 393 corresponding to the pin receiving groove 192 is
configured to be mounted on the boom mounting pin 94 and to be
removably attached to the boom 328 by, for example, four screws
received by corresponding bores 396, 397, 398, and 399. In some
embodiments, the boom mounting member 395 may be removably attached
to the boom 328 via more or less than four screws. In some other
embodiments, the boom mounting member 395 may be fixedly attached
to the boom 328 by means of, for instance, welding, soldering,
riveting, adhering, or any other suitable means known in the
art
[0052] As illustrated in FIGS. 3 to 6, the boom mounting pin 94
comprises a cylindrical shape corresponding to the shapes of the
respective pin receiving grooves and the pin receiving bores at the
side barriers, the mounting members, and/or the boom. In some
embodiments, a bearing bushing (not shown) may be disposed between
the boom mounting pin 94 and the pin receiving bore 92 at the boom
28 for providing rotational movement of the boom 28 relative to the
boom mounting pin 94.
[0053] Referring to FIG. 7, a further embodiment of the boom
mounting pin 194 is illustrated. The boom mounting pin 194
comprises a cylindrical portion 195 and a flat portion 195. The
flat portion 195 is configured to, after assembling the boom 28 to
the side barriers, restrict the boom mounting pin 194 from rotating
during movement of the boom 28. Therefore, the respective pin
receiving grooves and pin receiving bores at the side barriers, the
mounting members, and/or the boom may also comprise a flat portion
for completely corresponding to the shape of the boom mounting pin
194, such that the boom mounting pin 194 is fixedly secured to the
side barriers.
[0054] With respect to FIG. 8, a further embodiment of a boom
mounting pin 294 is depicted. The boom mounting pin 294 comprises a
first section 295 having a first diameter, a second section 296
having a second diameter, and a third section 297 having a third
diameter. The first diameter and the third diameter may be equal,
wherein the second diameter may be larger than the first and third
diameters. Thus, the boom mounting pin 294 of FIG. 9 is provided in
a stepped shape.
[0055] The first and third sections 295, 297 comprise a length
corresponding to the length of the pin receiving grooves and/or the
pin receiving bores, wherein the second section 296 comprises a
length substantially corresponding to the distance between the
first and second side barriers.
[0056] In some embodiments, the boom mounting pin 294 may only
comprise the first section 295 and the second section 296 having
unequal diameters.
INDUSTRIAL APPLICABILITY
[0057] In the following, exemplary embodiments of methods for
mounting a boom to a construction machine, such as a wheeled
excavator, may be described with reference to FIGS. 1 to 8.
[0058] A first embodiment for mounting a boom 28 to a chassis of a
construction machine, such as the first and second side barriers
70, 80, is described with reference to FIG. 3. In a first
assembling step, the boom mounting pin 94 is inserted into the pin
receiving bore 92 of the boom 28, such that one end face of the
boom mounting pin 94 is planar with one end side face of the boom
28 facing the pin receiving bore 82 of the second side barrier 80.
Thus, the boom mounting pin 94 at least partially protrudes out of
the pin receiving bore 92 at a side facing the pin receiving groove
72. Subsequently, the boom 28 is positioned within the boom
mounting portion 60, such that the at least partially protruding
boom mounting pin is accommodated within the pin receiving groove
72 and such that the pin receiving bore 92 of the boom 28 is
aligned with the pin receiving bore 82 of the second side barrier
80.
[0059] Next, the boom mounting pin 94 is slid into the pin
receiving bore 82 from the protruding side of the boom mounting pin
94, such that the boom mounting pin 94 is at least partially
arranged within the pin receiving groove 72 and at least partially
within the pin receiving bore 82. In some embodiments, at least one
cotter-pin (not shown in the drawings) may be employed for
preventing the boom mounting pin from leaving the pin receiving
groove 72 and the pin receiving bore 82.
[0060] In a final step, the mounting member 78 is mounted on the
boom mounting pin 94 at the pin receiving groove 72 and is
removably attached to the mounting surfaces 73, 74 via, for
instance, two screws. For example, for ensuring a rigid attachment
of the boom 28 to the construction machine 10, the screws may have
a size of M36 or larger.
[0061] With respect to FIG. 4, a second embodiment for mounting a
boom 28 to a chassis of a construction machine, such as the first
and second side barriers 170, 180, is described. First, the boom
mounting pin 94 is inserted into the pin receiving bore 92 of the
boom 28, such that the boom mounting pin 94 protrudes at least
partially out of both sides of the pin receiving bore 92.
[0062] Subsequently, the boom 28 is positioned within the boom
mounting portion 60, such that both protruding ends of the boom
mounting pin 92 are accommodated within both pin receiving grooves
172, 182. Then, in a final step, the mounting members 178, 188 are
mounted on the boom mounting pin 94 at the pin receiving grooves
172, 182, respectively, and are removably attached to the mounting
surfaces 73, 74 and 183, 784, respectively, via screws.
[0063] With respect to FIG. 5, a third embodiment for mounting a
boom 28 to a chassis of a construction machine, such as the first
and second side barriers 270, 280, is explained. First, the boom
mounting pin 94 is inserted into the pin receiving bore 92, such
that the boom mounting pin 94 protrudes at least partially out of
the pin receiving bore 92 on both sides.
[0064] Subsequently, the two mounting members 278, 288 are mounted
on the boom mounting pin 92 at both protruding ends of the boom
mounting pin 94, i.e. the boom mounting pin 94 is further
accommodated within the pin receiving bores 272, 282.
[0065] Then, the boom 28 is positioned within the boom mounting
portion 60, such that the attaching bores of the mounting members
278, 288 are aligned with the bores 275, 276 and 285, 286 of the
respective side barriers 270, 280. In a final step, the two
mounting members 272, 282 are secured to the side barriers 270, 280
via, for instance, respective screws.
[0066] A fourth embodiment for mounting a boom 28 to a chassis of a
construction machine, such as the first and second side barriers
370, 380, is described with respect to FIG. 6. First, the boom
mounting pin 94 is inserted into the pin receiving bore 372 of the
first side barrier 370 and into the pin receiving bore 382 of the
second side barrier 380. Then, the boom 28 is positioned within the
boom mounting portion 60, such that the pin receiving groove 192 of
the boom is mounted on the boom mounting pin 94. Then, the boom
mounting member 395 is also disposed within the boom mounting
portion 60, such that the pin receiving groove 393 is also mounted
on the boom mounting pin 94 at a side opposite to the side where
the pin receiving groove 92 is mounted. In a final step, the boom
mounting member 395 is removably attached to the boom 28 via, for
example, screws.
[0067] In the embodiments described above, screws having a size of
M36 or larger may be employed for mounting the boom to the chassis
of the construction machine.
[0068] It is stated, that the above described methods for mounting
a boom to a construction machine are not limited to a construction
machine having at least two side barriers. In some embodiments, the
two side barriers may be integrally formed with the chassis of the
superstructure or the chassis of the construction machine. Thus,
any described pin receiving grooves and pin receiving bores may be
also disposed at the chassis of the construction machine, such that
mounting a boom to the construction machine is still
facilitated.
[0069] Although the preferred embodiments of this invention have
been described herein, improvements and modifications may be
incorporated without departing from the scope of the following
claims.
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