WO1998016419A1 - Load sharing wheel assembly for track laying vehicle - Google Patents
Load sharing wheel assembly for track laying vehicle Download PDFInfo
- Publication number
- WO1998016419A1 WO1998016419A1 PCT/AU1997/000686 AU9700686W WO9816419A1 WO 1998016419 A1 WO1998016419 A1 WO 1998016419A1 AU 9700686 W AU9700686 W AU 9700686W WO 9816419 A1 WO9816419 A1 WO 9816419A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- track
- load sharing
- wheel assembly
- load
- Prior art date
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
- B62D55/14—Arrangement, location, or adaptation of rollers
Definitions
- This invention relates generally to track laying vehicles and more particularly to a load sharing wheel assembly for use in such vehicles.
- Track laying vehicles to which the invention can apply may comprise a vehicle body having a longitudinal axis extending between forward and rearward ends thereof and a pair of track assemblies disposed on opposite sides of the vehicle body.
- Each track assembly may comprise first and second wheels which are spaced apart in the direction of the longitudinal axis with at least one of the wheels defining a drive wheel.
- the assembly may further include a track which may for example be formed of elastomeric material the track being entrained around the first and second wheels and having a ground engaging surface, and an opposite wheel engaging surface with a plurality of power transmitting elements or drive lugs projecting from the wheel engaging surface.
- the vehicle may further include a plurality of load sharing wheels between the drive wheel and the idler wheel.
- the load sharing wheels currently in use comprise a series of wheel sets disposed in spaced apart relation between the first and second wheels. Each wheel set comprises a pair of spaced apart wheels the space between the wheels forming a passage through which the drive lugs on the track pass.
- the load sharing wheels are operatively connected to the vehicle frame and provide for a load supporting function as well as track belt guiding function.
- Currently known load sharing wheels have horizontal axes of rotation and as such frictionally bear on the sides of the lugs as a result of a sliding action between the side of the wheel and the lug as the lugs pass between the wheels of each set. If high side loads are applied to the vehicle such as if the vehicle is on a sloping surface the relative sliding movement can cause very high wear on both the wheel and the lug of the track.
- a load sharing wheel assembly which is suitable for use with a track for a track laying vehicle, the wheel assembly including at least one wheel set, the wheel set including two wheels which are spaced apart from one another so as to form a passage therebetween, each wheel having a rim section and being rotatable about an axis of rotation.
- the rim section includes a primary load bearing portion and primary guide portion, the surface of each portion being generally disposed in respective planes which are inclined to one another and the rotation axis of each wheel being inclined to the planes of said portions.
- the load sharing wheel assembly of the present invention is suitable for use with a track assembly which includes a track with a base part having a ground engaging surface and a wheel engaging surface and a series of drive lugs spaced apart from one another along the length of the track and projecting from the wheel engaging surface.
- the drive lugs may have lateral sides with wheel bearing surfaces thereon.
- the arrangement is such that when the belt moves past the load sharing wheel assembly there is a component of rolling movement between the guide portion of each wheel and the wheel bearing surfaces of the drive lugs as well as between the load bearing portion of each wheel and the wheel engaging surface of the track.
- each wheel is generally vee-shaped in cross-section one face defining the primary load bearing portion and the other face defining the primary guide portion.
- the rotation plane of each wheel is inclined with respect to the plane of the wheel engaging surface of the track so that the apex of the vee-shape is disposed adjacent the junction of the track wheel engaging surface and lug wheel bearing surface.
- an axle assembly including a body portion operatively connected to the vehicle body and a pair of stub axles each being adapted to receive one of said wheels thereon, the stub axles being inclined downwardly and outwardly with respect to one another and with respect to the normal orientation of the vehicle.
- the axle assembly includes an intermediate or central section operatively connected to the vehicle body which the stub axle sections extending away from the intermediate section, the longitudinal axes of the stub axles being inclined to the longitudinal axis of the intermediate section. It will be appreciated that the stub axles could be independent parts.
- rim section of each wheel includes an elastomer ic covering thereon.
- the elastomeric material can be of any suitable form.
- each wheel is inclined at an angle which bi-sects the angle between the guide plane and the load bearing plane.
- the assembly includes a plurality of wheel sets at least one of said wheel sets being in the form of wheel set according to the invention as described above.
- Figure 1 is a side elevation of a typical track laying vehicle
- Figure 2 is a plan view taken along line A-A of Figure 1 ;
- Figure 3 is a schematic view showing a load sharing wheel set according to the present invention.
- FIG. 1 illustrates a track laying vehicle 1 of the type to which the load sharing wheel set of the invention is applicable.
- the vehicle 1 includes a chassis and frame 3 with a longitudinal axis 33, an operators cabin 4 and an engine 2.
- a drawbar 17 Connected to frame 3 is a drawbar 17 which is used to attach draft loads.
- the vehicle is propelled by an elastomeric track 9 along each longitudinal side of chassis 3 which is entrained around a drive wheel 5, an idler wheel 32 and load sharing track wheels 19, 20.
- Ground engagement of the track 9 is made by ribs 10 being part of track 9.
- each track 9 has direct or positive drive engagement with the drive wheel 5 by means of engagement between the cross members 7 of the drive wheel
- the track 9 and drive lugs 11 maintain lateral registry with the load sharing wheels
- FIG. 3 there is shown a load sharing wheel set according to a preferred embodiment and generally indicated at 100.
- the wheel set 100 is shown in use with a track 150 which includes a base part 151 with a ribbed ground engaging surface 153 and a wheel engaging surface 155.
- the track further includes a series a drive lugs 156 which are generally centrally disposed and project from wheel engaging surface 155.
- the drive lugs 156 include lateral sides 157 and 158 having wheel bearing surfaces 160 and 161 which are disposed in guide planes X-X.
- the upper wheel engaging surface 155 is disposed in load bearing plane Y-Y.
- the wheel set 100 includes a pair of spaced apart load sharing wheels 101 and 102 which operatively mounted on axle assembly 105 includes a central section 106 operatively connected to the vehicle track frame 110 and two stub axles 107 and 108 extending from the central section at an inclined angle relative thereto each stub axle having one of the wheels 101 and 102 mounted thereon for rotation about rotation axes Z-Z.
- the load sharing wheels 101 and 102 include a rim section 112, the rim section including a load bearing portion 113 and a guide portion 114. Each wheel 101 and 102 may further include a covering 115 of elastomeric material on the rim section 112. There may further be provided a suitable bearing assembly 116 (only one is shown).
- the axes of rotation Z-Z of the wheels 101 and 102 are inclined relative to one another and inclined to the longitudinal axis C-C of the central section 106 of the axle assembly 105 so that the load bearing portion 113 is in contact with the wheel engaging surface 155 of track 150 and the guide portion 114 will contact the lateral sides 157 and 158 of the drive lug 156 when it passes between the wheels 101 and 102.
- the diametric axis D-D which is at right angles to axis of rotation of each wheel bi-sects the angle P between the guide plane X-X and the load bearing plane Y-Y.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9908453A GB2333273A (en) | 1996-10-16 | 1997-10-14 | Load sharing wheel assembly for track laying vehicle |
AU45436/97A AU4543697A (en) | 1996-10-16 | 1997-10-14 | Load sharing wheel assembly for track laying vehicle |
DE19782050T DE19782050T1 (en) | 1996-10-16 | 1997-10-14 | Load sharing wheel assembly for caterpillar |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPO3020A AUPO302096A0 (en) | 1996-10-16 | 1996-10-16 | Load sharing wheel assembly for track laying vehicle |
AUPO3020 | 1996-10-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998016419A1 true WO1998016419A1 (en) | 1998-04-23 |
Family
ID=3797329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1997/000686 WO1998016419A1 (en) | 1996-10-16 | 1997-10-14 | Load sharing wheel assembly for track laying vehicle |
Country Status (4)
Country | Link |
---|---|
AU (1) | AUPO302096A0 (en) |
DE (1) | DE19782050T1 (en) |
GB (1) | GB2333273A (en) |
WO (1) | WO1998016419A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1055591A1 (en) * | 1999-05-28 | 2000-11-29 | Otico | Traction device comprising flexible crawler track for an off-road vehicle |
WO2016131140A1 (en) * | 2015-02-18 | 2016-08-25 | Camso Inc. | Track system for traction of a vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR523157A (en) * | 1920-08-28 | 1921-08-13 | Adolphe Kegresse | Mechanisms for the practical use of flexible tracks |
DE510983C (en) * | 1930-10-29 | Adolf Bleichert & Co Akt Ges | Support roller arrangement for crawler tracks | |
DE4230389A1 (en) * | 1991-10-08 | 1993-04-15 | Werner Dr Ing Hoefflinger | Crawler vehicle running gear - has inclined running rollers on both sides around which run tracks or belts with inclined and angled running and guide surfaces |
-
1996
- 1996-10-16 AU AUPO3020A patent/AUPO302096A0/en not_active Abandoned
-
1997
- 1997-10-14 GB GB9908453A patent/GB2333273A/en not_active Withdrawn
- 1997-10-14 WO PCT/AU1997/000686 patent/WO1998016419A1/en active Application Filing
- 1997-10-14 DE DE19782050T patent/DE19782050T1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE510983C (en) * | 1930-10-29 | Adolf Bleichert & Co Akt Ges | Support roller arrangement for crawler tracks | |
FR523157A (en) * | 1920-08-28 | 1921-08-13 | Adolphe Kegresse | Mechanisms for the practical use of flexible tracks |
DE4230389A1 (en) * | 1991-10-08 | 1993-04-15 | Werner Dr Ing Hoefflinger | Crawler vehicle running gear - has inclined running rollers on both sides around which run tracks or belts with inclined and angled running and guide surfaces |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1055591A1 (en) * | 1999-05-28 | 2000-11-29 | Otico | Traction device comprising flexible crawler track for an off-road vehicle |
FR2794095A1 (en) * | 1999-05-28 | 2000-12-01 | Otico | FLEXIBLE TRACK DRIVE DEVICE FOR ALL-TERRAIN VEHICLE |
US6364437B1 (en) | 1999-05-28 | 2002-04-02 | Otico | Flexible track drive device for all-terrain vehicle |
WO2016131140A1 (en) * | 2015-02-18 | 2016-08-25 | Camso Inc. | Track system for traction of a vehicle |
US10647367B2 (en) | 2015-02-18 | 2020-05-12 | Camso Inc. | Track system for traction of a vehicle |
US11572112B2 (en) | 2015-02-18 | 2023-02-07 | Camso Inc. | Track system for traction of a vehicle |
Also Published As
Publication number | Publication date |
---|---|
GB9908453D0 (en) | 1999-06-09 |
DE19782050T1 (en) | 1999-10-14 |
GB2333273A (en) | 1999-07-21 |
AUPO302096A0 (en) | 1996-11-07 |
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