WO1999001331A1 - Adjustable support beam for a mobile machine - Google Patents

Adjustable support beam for a mobile machine Download PDF

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Publication number
WO1999001331A1
WO1999001331A1 PCT/US1998/011551 US9811551W WO9901331A1 WO 1999001331 A1 WO1999001331 A1 WO 1999001331A1 US 9811551 W US9811551 W US 9811551W WO 9901331 A1 WO9901331 A1 WO 9901331A1
Authority
WO
WIPO (PCT)
Prior art keywords
assemblies
rack
assembly
mobile machine
pinion
Prior art date
Application number
PCT/US1998/011551
Other languages
French (fr)
Inventor
Dewaine A. Kautsch
Original Assignee
Caterpillar Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc. filed Critical Caterpillar Inc.
Priority to AU80588/98A priority Critical patent/AU8058898A/en
Publication of WO1999001331A1 publication Critical patent/WO1999001331A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/084—Endless-track units or carriages mounted separably, adjustably or extensibly on vehicles, e.g. portable track units

Definitions

  • This invention relates to a support beam for a mobile machine and more particularly to rack and pinion assemblies on a laterally-extending support beam and axle assemblies which adjustably support the machine on auxiliary frame assemblies and wheels.
  • Each track assembly encircles an auxiliary frame assembly on either side of the mobile machine.
  • the auxiliary frames typically each have a drive wheel, an idler wheel and a set of smaller roller wheels for track alignment and tensioning.
  • Between the auxiliary frames is a laterally-extending support beam which connects the frames. The distance between the auxiliary frames is a function of the length of the support beam and where upon the support beam each auxiliary frame is attached.
  • each drive wheel is connected by an axle to the main frame of the machine, the distance between the wheels being a function of the length of the respective axles and the location upon the axle where each wheel is attached.
  • US Patent 5,072,800 issued 17 December 1991, to Price discloses a track-type tractor having tracks entrained around wheels which are mounted on outboard auxiliary frames. The entire assembly is mounted on a support beam and is laterally movable thereon to various positions defined by bolt holes . This provides various gage settings of the tracks; however, the settings are limited by the locations of the holes, and bolts must be removed before the tracks can be repositioned. It is desirable to provide an arrangement which is more versatile and which allows lateral adjustments to be accomplished more easily.
  • US Patent 4,317,596 issued 2 March 1982 to Lemmon discloses an assembly by which a wheel may be adjustably positioned on an axle.
  • the assembly includes a rack and a keyway on the axle, and two pairs of wedges.
  • One of the wedges has a pinion which meshes with the rack to axially move the wheel hub along the axle.
  • the present invention is directed to overcoming one or more of the problems set forth above. Disclosure of the Invention
  • a mobile machine having a main frame, first and second auxiliary frame assemblies on opposite sides of the main frame, the auxiliary frame assemblies each supporting front and rear wheels of the machine, a laterally-extending support beam intermediate the front and rear wheels for supporting the auxiliary frame assemblies on the main frame, first and second end racks at opposite ends of the laterally-extending support beam, and first and second pinion assemblies mounted respectively to the first and second auxiliary frame assemblies intermediate the front and rear wheels, each pinion assembly mating with one of the racks, and each auxiliary frame assembly being moveable relative to the main frame by moving the pinion along the rack.
  • FIG. 1 is a side elevational view of a track-type tractor incorporating one embodiment of the invention
  • FIG. 2 is a bottom plan view, partly in section, of the FIG. 1 tractor;
  • FIG. 3 is a fragmentary perspective view of the auxiliary frames of the FIG. 1 tractor mounted on a support beam and rear axle;
  • FIG. 4 is an enlarged side view of one end of the support beam and a portion of the auxiliary frame which is mounted thereon, and illustrating the rack and pinion in greater detail;
  • FIG. 5 is an enlarged top view of the FIG. 4 arrangement.
  • FIG. 6 is an enlarged perspective view of the right rear outside wheel assembly, illustrating the hub in greater detail.
  • a track-type agricultural tractor 10 has a main frame 12, an engine 14, and an undercarriage assembly 16.
  • First and second elongate drive axles 22,24 are rotatably coupled to and powered by the engine 14 through a drive train as is well known in the art.
  • First and second drive wheel assemblies 26,28, forming part of the undercarriage assembly 16 are rotatably connected respectively to the first and second drive axles 22,24 at first and second hubs 31,33 by first and second clamp assemblies 30,32.
  • the clamp assemblies 30,32 are advantageously releasably connected to the hubs 31,33.
  • Each respective drive axle 22,24 has a distal end where a rack portion 90 is located.
  • the rack portion 90 is advantageously at the same radial level as the planar portion 92.
  • a pinion assembly 94 which mates with the rack portion 90.
  • Each wheel assembly 26,28 is moved laterally upon a respective drive axle 22,24 by releasing a respective clamp assembly 30,32 and turning pinion 94 upon rack 90.
  • One rack and pinion assembly is shown in FIG. 3, the opposite side being a mirror image.
  • the undercarriage assembly 16 also includes a rigid laterally-extending support beam 46 and generally parallel first and second auxiliary frames 18,20, each having first and second roller frame assemblies 36,38, first and second idler wheel assemblies 40,42, a plurality of guide rollers 44.
  • Each idler wheel assembly 40,42 includes first and second spaced idler wheels 51,53.
  • Each drive wheel assembly 26,28 includes first and second spaced drive wheels 27,29.
  • Each of first and second endless track assemblies 48,50 encircles a respective one of the drive wheel assemblies 26,28, the roller frame assemblies 36,38, the guide rollers 44, and the idler wheel assemblies 40,42.
  • the guide rollers 44 are rotatably connected to the roller frame assemblies 36,38.
  • Each of the roller frame assemblies 36,38 has first and second end portions 52,54 and 56,58 respectively.
  • Each of the idler wheel assemblies 40,42 is rotatably connected to a respective first end portion 52,56 of the roller frame assemblies 36,38.
  • the track assemblies 48,50 advantageously include endless reinforced elastomeric belts 60,62.
  • the support beam 46 has first and second end portions 84,86 and is mounted at a respective first end portion 52,56 of each roller frame assembly 36,38.
  • Support beam end portions 84,86 have a respective first and second rack 64,66 which are advantageously formed separately. However, a rack could be integrally formed if desired.
  • Each roller frame assembly first end portion 52,56 has a pinion assembly 74,76 which mates with one of the racks 64,66 of the support beam 46. This allows each roller frame assembly 36,38 to be moved laterally relative to the main frame 12 by moving a pinion 74,76 along a rack 64, 66.
  • FIGS. 3 and 4 show that the end portions 84,86 of the support beam 46 have planar portions 65,67 and each rack 64,66 is removably attached using bolts 78, to a respective planar portion 65,67.
  • Each rack 64,66 is advantageously at the radial level of the respective planar portion 65,67. But for the planar portions 65,67, the support beam 46 is substantially circular in cross-section.
  • Tractor 10 is particularly useful as an agricultural type work machine. It is advantageous that such a tractor 10 have good traction, low ground pressure, low soil compaction, relatively high ground clearance, and have variable gage capabilities. The variable gage is especially useful for operating the vehicle in agricultural fields having different row crop spacings .
  • the tractor 10 is supported and propelled by an undercarriage assembly 16 which includes first and second roller frame assemblies 36,38, first and second idler wheel assemblies 40,42, first and second drive wheels 26,28, and first and second endless elastomeric track assemblies 48,50.
  • the idler wheel assemblies 40,42 are rotatably connected to the first end portions 52,56 of the roller frame assemblies 36,38 and the drive wheel assemblies 26,28 are rotatably connected to and powered by the drive axles 22,24. These connections include first and second clamp assemblies 30,32 to which the drive wheel 26,28 are connected respectively.
  • auxiliary frame assemblies 18,20 While the auxiliary frame assemblies 18,20 are being laterally extended or adjusted, the tractor should be supported in some manner to relieve the weight on one roller frame assembly 36 or 38 and the corresponding drive wheel assembly 26 or 28. This may be accomplished in several ways, including a lifting device supporting the rear axle 22,24 and the front support beam 46.
  • the clamp assemblies 30,32 are clamped onto the drive axles 22,24 by a plurality of fasteners 88.
  • fasteners 88 When fasteners 88 are loosened, the frictional force between the drive axles 22,24 and the clamp assemblies 30,32 is released and the clamp assemblies 30,32, including drive wheels 26,28, may be moved laterally to any selected position on the drive axles 22,24. This lateral movement is accurately performed by turning pinion 94 against rack 90 in any convenient manner.
  • the connections between the support beam 46 and roller frame assembly 36 or 38 should also be released before the drive wheel assembly 26 or 28 is moved, because the drive wheel assemblies 26,28 are connected to the roller frame assemblies 36,38 through the arm members 70,72.
  • a support beam clamp assembly 80 or 82 is loosened by loosening fasteners 96 (not shown) .
  • the loosening of fasteners 78 allows roller frame assembly 36 or 38 to drop slightly away from the support beam 46, freeing the clamping force upon the beam.
  • turning a respective pinion 74 or 76 against a corresponding rack 64 or 66 allows accurate lateral movement of the roller frame assembly 36 or 38.
  • clamp assemblies are loosened adjacent rack and pinion assemblies on a tractor side to perform lateral movement (gage change) of auxiliary frame assembly 18 or 20.

Abstract

A mobile machine (10) having a main frame (12), and first and second auxiliary frame assemblies (18, 20) on opposite sides of the main frame (12). The auxiliary frame assemblies (18, 20) each support the front and rear wheels of the machine (10), and a laterally-extending support beam (46) is intermediate the front and rear wheels for supporting the auxiliary frame assemblies (18, 20) on the main frame (12). First and second end racks (64, 66) are at opposite ends of the laterally extending support beam (46), and first and second pinion assemblies (74, 76) are mounted respectively to the first and second auxiliary frame assemblies (18, 20) intermediate the front and rear wheels. Each pinion assembly (74, 76) mates with one of the racks (64, 66), whereby each auxiliary frame assembly (18, 20) may be moved relative to the main frame (12) by moving the pinion along the rack (64, 66).

Description

Description
Adjustable Support Beam for a Mobile Machine
Technical Field
This invention relates to a support beam for a mobile machine and more particularly to rack and pinion assemblies on a laterally-extending support beam and axle assemblies which adjustably support the machine on auxiliary frame assemblies and wheels.
Background Art
Construction, earthmoving and agricultural type mobile machines such as tractors are often equipped with endless self-laying metal track chain assemblies for support and propulsion of the machine. More recently, elastomeric track belts have been used in applications formerly employing only metal track chains. Each track assembly encircles an auxiliary frame assembly on either side of the mobile machine. The auxiliary frames typically each have a drive wheel, an idler wheel and a set of smaller roller wheels for track alignment and tensioning. Between the auxiliary frames is a laterally-extending support beam which connects the frames. The distance between the auxiliary frames is a function of the length of the support beam and where upon the support beam each auxiliary frame is attached. Similarly, each drive wheel is connected by an axle to the main frame of the machine, the distance between the wheels being a function of the length of the respective axles and the location upon the axle where each wheel is attached. In agricultural machines it is sometimes desirable to change the lateral distance between the wheels and/or tracks. US Patent 5,072,800 issued 17 December 1991, to Price, discloses a track-type tractor having tracks entrained around wheels which are mounted on outboard auxiliary frames. The entire assembly is mounted on a support beam and is laterally movable thereon to various positions defined by bolt holes . This provides various gage settings of the tracks; however, the settings are limited by the locations of the holes, and bolts must be removed before the tracks can be repositioned. It is desirable to provide an arrangement which is more versatile and which allows lateral adjustments to be accomplished more easily.
US Patent 4,317,596 issued 2 March 1982 to Lemmon, discloses an assembly by which a wheel may be adjustably positioned on an axle. The assembly includes a rack and a keyway on the axle, and two pairs of wedges. One of the wedges has a pinion which meshes with the rack to axially move the wheel hub along the axle. There is no provision for simultaneously adjusting both wheels on one side of the tractor and the plurality of wedges make the arrangement complex. It is desirable to provide a simplified arrangement and one which allows such simultaneous adjustment.
The present invention is directed to overcoming one or more of the problems set forth above. Disclosure of the Invention
In accordance with the present invention there is provided a mobile machine having a main frame, first and second auxiliary frame assemblies on opposite sides of the main frame, the auxiliary frame assemblies each supporting front and rear wheels of the machine, a laterally-extending support beam intermediate the front and rear wheels for supporting the auxiliary frame assemblies on the main frame, first and second end racks at opposite ends of the laterally-extending support beam, and first and second pinion assemblies mounted respectively to the first and second auxiliary frame assemblies intermediate the front and rear wheels, each pinion assembly mating with one of the racks, and each auxiliary frame assembly being moveable relative to the main frame by moving the pinion along the rack.
Other advantages of the invention will become apparent from the following description of one embodiment thereof taken in conjunction with the drawings .
Brief Description of the Drawings
FIG. 1 is a side elevational view of a track-type tractor incorporating one embodiment of the invention;
FIG. 2 is a bottom plan view, partly in section, of the FIG. 1 tractor;
FIG. 3 is a fragmentary perspective view of the auxiliary frames of the FIG. 1 tractor mounted on a support beam and rear axle; FIG. 4 is an enlarged side view of one end of the support beam and a portion of the auxiliary frame which is mounted thereon, and illustrating the rack and pinion in greater detail;
FIG. 5 is an enlarged top view of the FIG. 4 arrangement; and
FIG. 6 is an enlarged perspective view of the right rear outside wheel assembly, illustrating the hub in greater detail.
Best Mode for Carrying Out the Invention
In the drawings a track-type agricultural tractor 10 has a main frame 12, an engine 14, and an undercarriage assembly 16. First and second elongate drive axles 22,24 are rotatably coupled to and powered by the engine 14 through a drive train as is well known in the art. First and second drive wheel assemblies 26,28, forming part of the undercarriage assembly 16, are rotatably connected respectively to the first and second drive axles 22,24 at first and second hubs 31,33 by first and second clamp assemblies 30,32. The clamp assemblies 30,32 are advantageously releasably connected to the hubs 31,33. Each respective drive axle 22,24 has a distal end where a rack portion 90 is located. A planar portion 92, circumferentially-spaced from the rack portion 90 at the distal end of each drive axle 22,24, assists in securing each axle to a respective hub 31,33. More than one planar portion 92, circumferentially-spaced from the rack portion 90, may be used. The rack portion 90 is advantageously at the same radial level as the planar portion 92. At the hub 31,33 of each respective drive wheel assembly 26,28 is a pinion assembly 94 which mates with the rack portion 90. Each wheel assembly 26,28 is moved laterally upon a respective drive axle 22,24 by releasing a respective clamp assembly 30,32 and turning pinion 94 upon rack 90. One rack and pinion assembly is shown in FIG. 3, the opposite side being a mirror image.
Referring to FIGS. 1 - 3, the undercarriage assembly 16 also includes a rigid laterally-extending support beam 46 and generally parallel first and second auxiliary frames 18,20, each having first and second roller frame assemblies 36,38, first and second idler wheel assemblies 40,42, a plurality of guide rollers 44. Each idler wheel assembly 40,42 includes first and second spaced idler wheels 51,53. Each drive wheel assembly 26,28 includes first and second spaced drive wheels 27,29. Each of first and second endless track assemblies 48,50 encircles a respective one of the drive wheel assemblies 26,28, the roller frame assemblies 36,38, the guide rollers 44, and the idler wheel assemblies 40,42. The guide rollers 44 are rotatably connected to the roller frame assemblies 36,38. Each of the roller frame assemblies 36,38 has first and second end portions 52,54 and 56,58 respectively. Each of the idler wheel assemblies 40,42 is rotatably connected to a respective first end portion 52,56 of the roller frame assemblies 36,38. The track assemblies 48,50 advantageously include endless reinforced elastomeric belts 60,62.
The support beam 46 has first and second end portions 84,86 and is mounted at a respective first end portion 52,56 of each roller frame assembly 36,38. Support beam end portions 84,86 have a respective first and second rack 64,66 which are advantageously formed separately. However, a rack could be integrally formed if desired. Each roller frame assembly first end portion 52,56 has a pinion assembly 74,76 which mates with one of the racks 64,66 of the support beam 46. This allows each roller frame assembly 36,38 to be moved laterally relative to the main frame 12 by moving a pinion 74,76 along a rack 64, 66.
FIGS. 3 and 4 show that the end portions 84,86 of the support beam 46 have planar portions 65,67 and each rack 64,66 is removably attached using bolts 78, to a respective planar portion 65,67. Each rack 64,66 is advantageously at the radial level of the respective planar portion 65,67. But for the planar portions 65,67, the support beam 46 is substantially circular in cross-section.
Industrial Applicability
Tractor 10 is particularly useful as an agricultural type work machine. It is advantageous that such a tractor 10 have good traction, low ground pressure, low soil compaction, relatively high ground clearance, and have variable gage capabilities. The variable gage is especially useful for operating the vehicle in agricultural fields having different row crop spacings . The tractor 10 is supported and propelled by an undercarriage assembly 16 which includes first and second roller frame assemblies 36,38, first and second idler wheel assemblies 40,42, first and second drive wheels 26,28, and first and second endless elastomeric track assemblies 48,50. The idler wheel assemblies 40,42 are rotatably connected to the first end portions 52,56 of the roller frame assemblies 36,38 and the drive wheel assemblies 26,28 are rotatably connected to and powered by the drive axles 22,24. These connections include first and second clamp assemblies 30,32 to which the drive wheel 26,28 are connected respectively.
While the auxiliary frame assemblies 18,20 are being laterally extended or adjusted, the tractor should be supported in some manner to relieve the weight on one roller frame assembly 36 or 38 and the corresponding drive wheel assembly 26 or 28. This may be accomplished in several ways, including a lifting device supporting the rear axle 22,24 and the front support beam 46.
As seen in FIG. 6, the clamp assemblies 30,32 are clamped onto the drive axles 22,24 by a plurality of fasteners 88. When fasteners 88 are loosened, the frictional force between the drive axles 22,24 and the clamp assemblies 30,32 is released and the clamp assemblies 30,32, including drive wheels 26,28, may be moved laterally to any selected position on the drive axles 22,24. This lateral movement is accurately performed by turning pinion 94 against rack 90 in any convenient manner. However, the connections between the support beam 46 and roller frame assembly 36 or 38 should also be released before the drive wheel assembly 26 or 28 is moved, because the drive wheel assemblies 26,28 are connected to the roller frame assemblies 36,38 through the arm members 70,72. To release the connection between the support beam 46 and roller frame assembly 36 or 38, a support beam clamp assembly 80 or 82 is loosened by loosening fasteners 96 (not shown) . When an auxiliary frame assembly 18,20 is elevated at support beam 46 for gage adjustment, the loosening of fasteners 78 allows roller frame assembly 36 or 38 to drop slightly away from the support beam 46, freeing the clamping force upon the beam. Similar to the drive wheel assembly 26 or 28 adjustment described above, turning a respective pinion 74 or 76 against a corresponding rack 64 or 66 allows accurate lateral movement of the roller frame assembly 36 or 38. As mentioned above, clamp assemblies are loosened adjacent rack and pinion assemblies on a tractor side to perform lateral movement (gage change) of auxiliary frame assembly 18 or 20.
Other aspects, objects and advantages of this invention can be obtained from a study of the drawings, the disclosure, and the appended claims.

Claims

Claims
1. A mobile machine (10) having a main frame (12), first and second auxiliary frame assemblies (18,20) on opposite sides of the main frame (12), the auxiliary frame assemblies (18,20) each supporting front and rear wheels of the machine, and a laterally-extending support beam (46) intermediate the front and rear wheels for supporting the auxiliary frame assemblies (18,20) on the main frame (12), the improvement comprising: first and second end racks (64,66) at opposite ends of the laterally extending support beam (46), and first and second pinion assemblies (74,76) mounted respectively to the first and second auxiliary frame assemblies (18,20) intermediate the front and rear wheels, each pinion assembly (74,76) mating with one of the racks (64,66), and each auxiliary frame assembly (18,20) being moveable relative to the main frame (12) by moving the pinion along the rack.
2. The mobile machine (10) as set forth in claim 1 wherein the opposite ends of the laterally- extending support beam (46) have planar portions (65, 67) .
3. The mobile machine (10) as set forth in claim 1 wherein said first and second end racks (64,66) are removably attached to the opposite ends of the laterally-extending support beam (46) .
4. The mobile machine (10) as set forth in claim 1 wherein the laterally extending support beam (46) is substantially circular in cross-section.
5. The mobile machine (10) as set forth in claim 1 including at least one laterally-extending elongate axle (22) extending from the main frame (12) and mounting at least one drive wheel (26) , said axle (22) having a distal end at the drive wheel (26), a rack (90) at the distal end of said elongate axle
(22), a pinion assembly (94) associated with each rear wheel, and mating with the respective rack (90) whereby each drive wheel (26) may be moved relative to the main frame (12) by moving the pinion assembly (94) along the rack (90) in correlation with movement of the auxiliary frame assembly (19,20) along the laterally-extending support beam (46).
6. The mobile machine (10) as set forth in claim 5 wherein one laterally-extending elongate axle
(22) has a planar portion (92) at the distal end thereof .
7. The mobile machine (10) as set forth in claim 6 wherein each rack (90) is at the radial level of the respective planar portion (92) .
8. The mobile machine (10) as set forth in claim 2 wherein each rack (64,66) is at the radial level of the respective planar portion (65,67).
9. The mobile machine (10) as set forth in claim 5 wherein one of the axle (26) (beam) has a planar portion (92) at the end thereof correlating to the rack and the planar portion (92) at the end thereof correlating to the rack (90) and the planar portion (92) is circumferentially spaced from the rack (94) .
10. The mobile machine (10) as set forth in claim 9 wherein the laterally-extending member (64) has a plurality of planar portions (65,67) at the end thereof correlating to the rack (64,66) and with at least one such planar portion (65,67) being circumferentially spaced from the rack (64,66) .
11. A mobile machine (10) having dual rack and pinion gage adjustment assemblies, comprising: a main frame assembly (12); an engine ( 14 ) ; first and second roller frame assemblies
(36,38), each positioned substantially parallel to the main frame assembly (12); first and second drive axles (22,24), each rotatably connected to said engine (14); first and second drive wheel assemblies
(26,28), each rotatably connected to a respective drive axle (22,24); first and second idler assemblies (40,42), each rotatably connected to a respective roller frame assembly (36,38); first and second endless elastomeric track belts (60,62), each belt encircling a respective roller frame assembly (36,38), idler assembly (40,42), and drive wheel (26,28); a support beam (46) having first and second end portions (52,54), said first and second end portions (52,54) having respective first and second external planar portions (65,67); first and second racks (64,66) attached respectively to said first and second external planar portions (65,67); first and second pinion assemblies (74,76) attached respectively to said first and second roller frame assemblies (36,38), said first and second pinion assemblies (74,76) being matingly engageable with said first and second end racks (64,66); first and second drive axle (26,28) having distal ends, each end extending outwardly from said main frame assembly (12) and having respective first and second drive axle rack portions (90); and first and second drive axle pinion assemblies (94), each said assembly being matingly engageable with a respective said first and second drive axle rack portion (90) .
PCT/US1998/011551 1997-07-01 1998-06-04 Adjustable support beam for a mobile machine WO1999001331A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU80588/98A AU8058898A (en) 1997-07-01 1998-06-04 Adjustable support beam for a mobile machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88683297A 1997-07-01 1997-07-01
US08/886,832 1997-07-01

Publications (1)

Publication Number Publication Date
WO1999001331A1 true WO1999001331A1 (en) 1999-01-14

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WO (1) WO1999001331A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106488A3 (en) * 1999-12-10 2001-10-10 NEW HOLLAND ITALIA S.p.A. Tractor with transverse supporting member
EP1967483A3 (en) * 2007-03-08 2009-03-25 Kobelco Cranes Co., Ltd. Crawler Vehicle
ITBO20080635A1 (en) * 2008-10-15 2010-04-16 Sampierana S P A UNDERTRUCK.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2002002A (en) * 1931-11-20 1935-05-21 Deere & Co Tractor
FR1427919A (en) * 1964-12-23 1966-02-11 Adjustable rear track straddle tractor
DE1815318A1 (en) * 1968-12-18 1970-06-25 Rheinstahl Union Ag Crawler vehicle, in particular crawler excavator or crane
US3894598A (en) * 1973-10-25 1975-07-15 Poclain Sa Telescopic beam formed of two slidably mounted lengths and an organ for controlling the relative positions of these lengths relative to one another
US4317596A (en) * 1980-05-20 1982-03-02 Deere & Company Adjustable wheel assembly
US5072800A (en) * 1990-04-24 1991-12-17 Caterpillar Inc. Support beam for a vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2002002A (en) * 1931-11-20 1935-05-21 Deere & Co Tractor
FR1427919A (en) * 1964-12-23 1966-02-11 Adjustable rear track straddle tractor
DE1815318A1 (en) * 1968-12-18 1970-06-25 Rheinstahl Union Ag Crawler vehicle, in particular crawler excavator or crane
US3894598A (en) * 1973-10-25 1975-07-15 Poclain Sa Telescopic beam formed of two slidably mounted lengths and an organ for controlling the relative positions of these lengths relative to one another
US4317596A (en) * 1980-05-20 1982-03-02 Deere & Company Adjustable wheel assembly
US5072800A (en) * 1990-04-24 1991-12-17 Caterpillar Inc. Support beam for a vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106488A3 (en) * 1999-12-10 2001-10-10 NEW HOLLAND ITALIA S.p.A. Tractor with transverse supporting member
EP1967483A3 (en) * 2007-03-08 2009-03-25 Kobelco Cranes Co., Ltd. Crawler Vehicle
US7992660B2 (en) 2007-03-08 2011-08-09 Kobelco Cranes Co., Ltd. Crawler vehicle
ITBO20080635A1 (en) * 2008-10-15 2010-04-16 Sampierana S P A UNDERTRUCK.
EP2221240A1 (en) * 2008-10-15 2010-08-25 Sampierana S.P.A. Undercarriage

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