WO2010109277A1 - Track with rotating bushings for track-type vehicles - Google Patents
Track with rotating bushings for track-type vehicles Download PDFInfo
- Publication number
- WO2010109277A1 WO2010109277A1 PCT/IB2010/000147 IB2010000147W WO2010109277A1 WO 2010109277 A1 WO2010109277 A1 WO 2010109277A1 IB 2010000147 W IB2010000147 W IB 2010000147W WO 2010109277 A1 WO2010109277 A1 WO 2010109277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- track
- end flange
- pin
- link
- ratio
- 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
- B62D55/18—Tracks
- B62D55/20—Tracks of articulated type, e.g. chains
- B62D55/205—Connections between track links
- B62D55/21—Links connected by transverse pivot pins
-
- 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
-
- 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
- B62D55/18—Tracks
Definitions
- the present invention refers to a track with rotating bushings for track-type vehicles, in particular but not exclusively a track with rotating bushings for track-type vehicles intended for ground movement .
- the tracks of a track-type work vehicle generally comprise a pair of parallel tracks, each obtained through a continuous sequence of hinge type articulated joints, connected to each other and maintained at a constant distance through suitable rigid connecting members, called "links" of the track.
- the tracks also comprise a plurality of bushings and pins, interposed between the links so as to connect their ends to form the tracks .
- the bushings and the supported links cooperate with each other to form a plurality of track joints, which allow the necessary rotational movement between adjacent links. This allows the articulation of the adjacent links when the track rotates wound around the (driving and/or driven) wheels of the track-type vehicle.
- the rotation of the track allows the track-type vehicle to move on the ground to carry out the many functions for which it is intended.
- a first drawback is due to the reduction of the structural rigidity of the entire tracks with respect to the tracks provided with fixed bushings .
- This reduction of the structural rigidity is due to the fact that the rotating bushings do not rigidly connect the links of the track.
- Another drawback is due to the fact that the presence of the rotating bushings makes it necessary to have other rigid connecting elements between the links of the track and the relative pins.
- These connecting elements are typically made up of sliding bearings coaxially mounted around the pin and inside suitable through holes foreseen on each link. Such sliding bearings must withstand all the stresses which the track undergoes in the working steps of the track-type vehicle, without compromising the integrity of the joints.
- the general purpose of the present invention is therefore that of making a track with rotating bushings for track-type vehicles, able to increase not only the life and the wearing of the bushings, but also that of the other elements that form the joints of the track with respect to the tracks according to the prior art .
- Another purpose of the invention is that of providing a track with rotating bushings for track-type vehicles, which makes it possible to obtain a balanced level of wearing for all the components belonging to the track itself, with the consequent possibility of better planning the maintenance operations on the track-type vehicle.
- Yet another purpose of the invention is that of being able to have a track with rotating bushings for track-type vehicles, that is easy to repair and that is interchangeable with other analogous tracks of the known type.
- figure 1 is a plan view of a portion of track with rotating bushings for track-type vehicles obtained according to the present invention
- figure 2 is a side view of the portion of track with rotating bushings of figure 1
- figure 3 is a perspective view of the portion of track with rotating bushings of figure 1, combined with the shoes of the tracks of the vehicle
- figure 4 is a section view, obtained along the line A-A of figure 1, of the track with rotating bushings obtained according to the present invention
- figure 5 is a side view of a link belonging to the track with rotating bushings obtained according to the present invention
- figure 6 is a partial section plan view of the link of figure 5
- figure 7 is another partial section top side view of the link of figure 5.
- the track 10 substantially consists of a continuous sequence of articulated joints 12, 12' of the hinge type, oriented according to an axis A-A substantially perpendicular to the central longitudinal development axis B-B of the track 10.
- the articulated joints 12, 12' are connected to each other and maintained at a constant distance through pairs of links 14 having longitudinal development, arranged laterally and symmetrically with respect to the longitudinal central axis B-B of the track 10.
- Each link 14 is of the asymmetrical type, that is to say provided with a first end flange 16 facing outwards the track 10, if seen with reference to the longitudinal central axis B-B, and with a second end flange 18 facing inwards the track 10 or, in other words, towards the longitudinal central axis B-B of the track 10 itself.
- Each link 14 is thus provided with a first, substantially flat, upper surface 20 intended to irremovably support the shoes 48 (figure 3), which complete the tracks of the vehicle.
- the shoes 48 (figure 3), which complete the tracks of the vehicle.
- one or more through holes 22 are performed intended to receive the engagement means 50, usually bolts, between the link 14 itself and the relative shoe 48 intended to rest on the ground.
- Each link 14 is moreover provided with a second, also substantially flat, lower guide surface 24 opposite with respect to the first upper surface 20 and intended to be engaged with the driven wheels, the lower rollers and the upper rollers for supporting the track, of the track-type vehicle .
- a first through hole 26 is obtained oriented according to an axis A-A perpendicular to the longitudinal central axis B-B of the track 10.
- a first annular groove 28, facing outwards the track 10, and a second annular groove 30, facing inwards the track 10, are then respectively obtained.
- the external 28 and internal 30 annular grooves have an internal diameter which is greater with respect to the internal diameter of the through hole 26.
- the internal annular groove 30 has an internal diameter which is greater with respect to the internal diameter of the external annular groove 28.
- a second through hole 32 facing inwards the track 10, of every link 14, facing inwards the track 10, of every link 14, is made.
- an annular groove 34 the internal diameter of which is greater than the internal diameter of the adjacent through hole 32, is then made.
- the internal diameters of the second through hole 32 and of the internal annular groove 30 of the first through hole 26 are substantially equal. This characteristic allows particular elements of the track 10, which shall be specified soon after, to be inserted inside the second through hole 32 and the internal annular groove 30 of the first through hole 26.
- each one of them is mainly made up of a substantially cylindrical pin 36, 36', oriented along an axis A-A perpendicular to the longitudinal central axis B-B of the track 10.
- Each pin 36, 36' is provided inside with channelings 38 (figure 4) intended for the circulation of the lubricant fluid, necessary for the track 10 to work properly.
- a bushing 40 free to rotate with respect to the pin 36, 36' itself is mounted.
- the teeth of the driving wheels of the track-type vehicle engage, in a manner such as to set the whole track system in motion.
- Each one of the links 14 is connected to a corresponding pin 36 through interference coupling, i.e. in a non-rotatable manner, of its outward facing end flange 16 with one of the ends of the pin 36 itself.
- each link 14 is mounted around the relative pin 36 through its insertion inside the through hole 26 foreseen on the first end flange 16 facing outside of the link 14 itself.
- the locking into position between the first end flange 16 facing outwards with respect to the link 14 and the end of the pin 36 is obtained by means of a ring 42 of the "Seeger" type, integrally joined with the pin 36 itself and housed inside the external annular groove 28 foreseen on such an end flange 16.
- Each link 14 is moreover rotatably connected to the next pin 36' through the insertion of the latter inside the through hole 32 foreseen on the second end flange 18 facing inwards with respect to the link 14 itself.
- at least one annular-shaped sliding bearing 44 is then housed inside of each through hole 32. More precisely, each sliding bearing 44 is housed, press- fitted, between the internal circumferential surface of each through hole 32 and the external circumferential surface of one of the pins 36, 36', guaranteeing the free rotation around the axis A-A thereof .
- the sliding bearings 44 are made from a metallic material and their resistance to the stresses undergone by the track 10 of the track-type vehicle in the work steps, depends upon the size characteristics of the aforementioned bearings . Therefore, according to the invention, the ratio R 0 between the length S and the related internal diameter D of each sliding bearing 44 is greater than 0.60. Preferably, such a ratio is greater than 0.65.
- R 0 0.65
- sealing groups 46, 46' are provided intended to cooperate with the rotating bushings 40, the links 14 and the sliding bearings 44 themselves to provide a sealing system for the articulated joints 12, 12' .
- one of the sealing groups 46 is housed inside the second annular groove 30, facing inwards the track 10, made at the first through hole 26 of each link 14, whereas the other sealing group 46' is interposed between the sliding bearing 44 itself and the rotating bushing 40 and it is housed inside the second through hole 32 of each link 14.
- the sealing groups 46 can be of the type described in the international patent application No. WO2008/093160, to the same Applicant, and shall not be explained in detail hereafter.
- the ratio R 1 between the overall width Li of the lower guide surface 24 of each link 14 and the overall thickness L 2 of the first end flange 16, facing outwards the track 10, of the link 14 itself must be greater than 1.
- a ratio R 1 is comprised in the range between 1.1 and 1.3.
- the ratio R 2 between the overall width L 1 of the lower guide surface 24 of each link 14 and the offset L 3 between the external surface of the first end flange 16, at the first annular groove 28, and the external edge of the lower guide surface 24 of the link 14 itself must be greater than 1.35.
- a ratio R 2 is comprised in the range between 1.4 and 1.65.
- the ratio R 3 between the overall thickness L 2 of the first end flange 16, and the overall thickness L 4 of the second end flange 18, facing inwards the track 10, of the link 14 itself must be smaller than 1.25.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Pivots And Pivotal Connections (AREA)
- Vehicle Body Suspensions (AREA)
- Chain Conveyers (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Springs (AREA)
- Handcart (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI1009151-3A BRPI1009151B1 (en) | 2009-03-24 | 2010-01-27 | MAT FOR VEHICLES |
JP2012501399A JP5791591B2 (en) | 2009-03-24 | 2010-01-27 | Track with rotary bushing for track-type vehicles |
US13/138,671 US8851582B2 (en) | 2009-03-24 | 2010-01-27 | Track with rotating bushings for track-type vehicles |
EP10716865.0A EP2411264B1 (en) | 2009-03-24 | 2010-01-27 | Track with rotating bushings for track-type vehicles |
CN201080020423XA CN102421661B (en) | 2009-03-24 | 2010-01-27 | Track with rotating bushings for track-type vehicles |
KR1020117022602A KR101698620B1 (en) | 2009-03-24 | 2010-01-27 | Track with rotating bushings for track-type vehicles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2009A000462A IT1399166B1 (en) | 2009-03-24 | 2009-03-24 | ROTARY BUSH CHAIN FOR TRACKED VEHICLES |
ITMI2009A000462 | 2009-03-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010109277A1 true WO2010109277A1 (en) | 2010-09-30 |
Family
ID=41328436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2010/000147 WO2010109277A1 (en) | 2009-03-24 | 2010-01-27 | Track with rotating bushings for track-type vehicles |
Country Status (8)
Country | Link |
---|---|
US (1) | US8851582B2 (en) |
EP (1) | EP2411264B1 (en) |
JP (1) | JP5791591B2 (en) |
KR (1) | KR101698620B1 (en) |
CN (1) | CN102421661B (en) |
BR (1) | BRPI1009151B1 (en) |
IT (1) | IT1399166B1 (en) |
WO (1) | WO2010109277A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5230836B1 (en) * | 2012-09-03 | 2013-07-10 | 株式会社小松製作所 | Track link and track device |
CN109383652A (en) * | 2018-12-05 | 2019-02-26 | 徐工集团工程机械有限公司 | Track rail assembly mounting structure and working truck |
WO2020146095A1 (en) * | 2019-01-10 | 2020-07-16 | Caterpillar Inc. | Track link having canted rail surface edges and machine track with same |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9126645B2 (en) * | 2011-06-28 | 2015-09-08 | Caterpillar Inc. | Track chain cartridge having thrust bearings |
JP5247913B1 (en) * | 2012-05-24 | 2013-07-24 | 株式会社小松製作所 | Crawler belt connecting device |
JP5775894B2 (en) * | 2013-03-06 | 2015-09-09 | 株式会社小松製作所 | Crawler belt connecting device |
US10065692B2 (en) | 2015-08-13 | 2018-09-04 | Caterpillar Inc. | Track link structure and pin joint assembly |
USD775239S1 (en) | 2015-08-13 | 2016-12-27 | Caterpillar Inc. | Rail guide |
JP6730920B2 (en) * | 2016-12-28 | 2020-07-29 | 株式会社小松製作所 | Crawler belt bearing bush and method of manufacturing the same |
USD823349S1 (en) | 2017-05-04 | 2018-07-17 | Caterpillar Inc. | Undercarriage track shoe for mobile earthmoving machine |
USD832308S1 (en) * | 2017-07-27 | 2018-10-30 | Deere & Company | Track link |
US11618517B2 (en) * | 2017-11-27 | 2023-04-04 | Italtractor Itm S.P.A. | Connection assembly for articulated chains |
US10919588B2 (en) * | 2018-02-23 | 2021-02-16 | Caterpillar Inc. | Track pin and bushing retention design for a track chain |
US10981612B2 (en) * | 2018-08-22 | 2021-04-20 | Caterpillar Inc. | Flanged master track pin with retaining ring |
US11312433B2 (en) * | 2019-01-23 | 2022-04-26 | Caterpillar Inc. | Sealing system for a track |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3903617C1 (en) * | 1989-02-08 | 1990-04-26 | O & K Orenstein & Koppel Ag, 1000 Berlin, De | |
US5183318A (en) * | 1991-11-26 | 1993-02-02 | Caterpillar Inc. | Endless track chain for track-type vehicles |
US6270173B1 (en) * | 1998-09-16 | 2001-08-07 | Komatsu Limited | Fixing structure of link and pin of travelling crawler belt, and fixing method thereof |
EP1258419A1 (en) * | 2000-12-22 | 2002-11-20 | Hitachi Construction Machinery Co., Ltd. | Crawler |
US20040012260A1 (en) * | 2002-03-29 | 2004-01-22 | Teiji Yamamoto | Crawler type traveling apparatus, sprocket for crawler belt and segments thereof |
WO2008007494A1 (en) * | 2006-07-11 | 2008-01-17 | Topy Kogyo Kabushiki Kaisha | Link for endless track belt |
Family Cites Families (14)
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US4126359A (en) * | 1977-06-15 | 1978-11-21 | Caterpillar Tractor Co. | Torsional track bushing |
US4150856A (en) * | 1977-11-25 | 1979-04-24 | Caterpillar Tractor Co. | One-piece track pin |
US4277199A (en) * | 1979-03-23 | 1981-07-07 | Caterpillar Tractor Co. | Keeper assembly |
JPS6223879A (en) * | 1985-07-25 | 1987-01-31 | Hitachi Constr Mach Co Ltd | Set ring |
US5201171A (en) * | 1991-11-26 | 1993-04-13 | Caterpillar Inc. | Method and apparatus for retaining a track chain joint |
JP3683060B2 (en) * | 1996-12-13 | 2005-08-17 | 株式会社小松製作所 | Tracked vehicle tracked vehicle |
US6564539B2 (en) * | 1999-12-09 | 2003-05-20 | Caterpillar Inc | Method and apparatus for retaining a track chain joint |
US6457304B1 (en) * | 1999-12-09 | 2002-10-01 | Caterpillar Inc | Method and apparatus for retaining a track chain joint |
JP2003165471A (en) * | 2001-12-03 | 2003-06-10 | Komatsu Ltd | Structure and method of fixing link and pin of crawler belt for running |
JP4179449B2 (en) * | 2002-03-29 | 2008-11-12 | 株式会社小松製作所 | Crawler track bearing device |
JP4289990B2 (en) * | 2003-01-29 | 2009-07-01 | 株式会社小松製作所 | Rotary bush type track |
JP4299593B2 (en) * | 2003-06-16 | 2009-07-22 | 株式会社小松製作所 | Crawler belt device and crawler belt link structure |
EP2008920B1 (en) * | 2006-04-17 | 2010-06-02 | Komatsu Ltd | Link for connecting track shoe of crawler belt, assembly for crawler belt, and crawler belt |
JP2007290568A (en) * | 2006-04-25 | 2007-11-08 | Komatsu Ltd | Crawler belt assembly |
-
2009
- 2009-03-24 IT ITMI2009A000462A patent/IT1399166B1/en active
-
2010
- 2010-01-27 JP JP2012501399A patent/JP5791591B2/en not_active Expired - Fee Related
- 2010-01-27 KR KR1020117022602A patent/KR101698620B1/en active IP Right Grant
- 2010-01-27 BR BRPI1009151-3A patent/BRPI1009151B1/en not_active IP Right Cessation
- 2010-01-27 CN CN201080020423XA patent/CN102421661B/en active Active
- 2010-01-27 EP EP10716865.0A patent/EP2411264B1/en active Active
- 2010-01-27 WO PCT/IB2010/000147 patent/WO2010109277A1/en active Application Filing
- 2010-01-27 US US13/138,671 patent/US8851582B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3903617C1 (en) * | 1989-02-08 | 1990-04-26 | O & K Orenstein & Koppel Ag, 1000 Berlin, De | |
US5183318A (en) * | 1991-11-26 | 1993-02-02 | Caterpillar Inc. | Endless track chain for track-type vehicles |
US6270173B1 (en) * | 1998-09-16 | 2001-08-07 | Komatsu Limited | Fixing structure of link and pin of travelling crawler belt, and fixing method thereof |
EP1258419A1 (en) * | 2000-12-22 | 2002-11-20 | Hitachi Construction Machinery Co., Ltd. | Crawler |
US20040012260A1 (en) * | 2002-03-29 | 2004-01-22 | Teiji Yamamoto | Crawler type traveling apparatus, sprocket for crawler belt and segments thereof |
WO2008007494A1 (en) * | 2006-07-11 | 2008-01-17 | Topy Kogyo Kabushiki Kaisha | Link for endless track belt |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5230836B1 (en) * | 2012-09-03 | 2013-07-10 | 株式会社小松製作所 | Track link and track device |
WO2014033971A1 (en) * | 2012-09-03 | 2014-03-06 | 株式会社小松製作所 | Track link and track device |
US9272742B2 (en) | 2012-09-03 | 2016-03-01 | Komatsu Ltd. | Crawler belt link and crawler belt apparatus |
DE112012004527B4 (en) | 2012-09-03 | 2018-10-25 | Komatsu Ltd. | Track chain link and track chain device |
CN109383652A (en) * | 2018-12-05 | 2019-02-26 | 徐工集团工程机械有限公司 | Track rail assembly mounting structure and working truck |
CN109383652B (en) * | 2018-12-05 | 2024-04-30 | 江苏徐工工程机械研究院有限公司 | Track assembly mounting structure and operation vehicle |
WO2020146095A1 (en) * | 2019-01-10 | 2020-07-16 | Caterpillar Inc. | Track link having canted rail surface edges and machine track with same |
US11492056B2 (en) | 2019-01-10 | 2022-11-08 | Caterpillar Inc. | Track link having canted rail surface edges and machine track with same |
AU2019421587B2 (en) * | 2019-01-10 | 2023-07-27 | Caterpillar Inc. | Track link having canted rail surface edges and machine track with same |
Also Published As
Publication number | Publication date |
---|---|
BRPI1009151A2 (en) | 2016-03-01 |
JP5791591B2 (en) | 2015-10-07 |
US8851582B2 (en) | 2014-10-07 |
KR101698620B1 (en) | 2017-01-20 |
KR20110138224A (en) | 2011-12-26 |
EP2411264A1 (en) | 2012-02-01 |
CN102421661A (en) | 2012-04-18 |
JP2012521326A (en) | 2012-09-13 |
US20120068530A1 (en) | 2012-03-22 |
ITMI20090462A1 (en) | 2010-09-25 |
EP2411264B1 (en) | 2013-05-01 |
BRPI1009151B1 (en) | 2020-06-23 |
CN102421661B (en) | 2013-12-04 |
IT1399166B1 (en) | 2013-04-11 |
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