WO2011034125A1 - Rubber crawler - Google Patents
Rubber crawler Download PDFInfo
- Publication number
- WO2011034125A1 WO2011034125A1 PCT/JP2010/066025 JP2010066025W WO2011034125A1 WO 2011034125 A1 WO2011034125 A1 WO 2011034125A1 JP 2010066025 W JP2010066025 W JP 2010066025W WO 2011034125 A1 WO2011034125 A1 WO 2011034125A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crawler
- rubber
- pair
- rubber crawler
- protrusions
- Prior art date
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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
- B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
- B62D55/244—Moulded in one piece, with either smooth surfaces or surfaces having projections, e.g. incorporating reinforcing elements
-
- 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
- B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
-
- 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
- B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
- B62D55/253—Tracks of continuously flexible type, e.g. rubber belts having elements interconnected by one or more cables or like elements
Definitions
- the present invention relates to a rubber crawler, and more particularly, to a rubber crawler having a drive protrusion that engages with sprocket teeth provided on the inner peripheral surface of the crawler main body and a core bar embedded in the crawler main body.
- FIG. 3 is a partial schematic cross-sectional side view of the crawler main body related to the rubber crawler disclosed in Patent Document 1. However, the state where the tooth portion of the sprocket is engaged with the drive protrusion of the crawler body is shown.
- a plurality of core bars 12 are embedded at predetermined intervals in the circumferential direction of the crawler body 10 in a posture in which the wing portions 12 a extend in the width direction of the crawler body 10.
- a recess 20 is formed between the cored bar 12 and the cored bar 12 on the inner peripheral surface side of the crawler body 10. That is, the recesses 20 and the cored bar 12 are alternately arranged in the circumferential direction of the crawler body 12.
- a lug portion 26 is formed on the ground contact surface E side of the crawler body 10.
- a pair of projecting portions 12c and 12c projecting toward the inner peripheral surface of the crawler body 10 are formed at a substantially central portion of the core metal 12 in the width direction of the crawler body 10 (see also FIG. 4 described later). Is covered with the same rubber member as the crawler body 10 to form a pair of drive projections 14, 14.
- the drive projection 14 has a function of driving the crawler body 10 around in response to a rotational pressing force (drive force) from the tooth portion 32 of the sprocket 30 and a function of guiding a wheel (not shown). ing.
- the teeth 32 of the sprocket 30 are provided at equal intervals on the outer edge of the sprocket 30 and rotate in the direction indicated by the arrow A in FIG. Moreover, the depth of the recessed part 20 formed in the crawler main body 10 is slightly shallower than the depth in which the cored bar 12 is embedded, as shown in FIG. In other words, the height from the ground contact surface E to the bottom surface 20 a of the recess 20 is configured to be slightly higher than the height from the ground contact surface E to the bottom surface 22 of the core metal 12. Therefore, when the tooth portion 32 of the sprocket 30 applies a rotational pressing force to the drive protrusion 14, the tooth portion 32 also engages with the concave portion 20 as described above. A part is applied.
- FIG. 4 is a partial schematic development plan view of the crawler body.
- the recess 20 is formed in a substantially rectangular shape at a substantially central portion in the width direction of the crawler body 10.
- the region of the recess 20 is indicated by hatching.
- the length of the concave portion 20 in the width direction of the rubber crawler is a length straddling between the pair of drive protrusions 14 and 14.
- the tooth portion 32 of the sprocket 30 engages with the pair of drive protrusions 14 and 14 and the recess 20 also engages to apply a rotational pressing force (driving force), but the length of the tooth portion 32 in the rubber crawler width direction. Is substantially the same as the length of the recess 20 in the width direction of the rubber crawler or between the pair of drive protrusions 14, 14.
- the protrusions 14 and 14 are straddled.
- a flat portion 18 between the protrusions and ridges 16, 16 are formed on both sides of the flat portion 18 between the protrusions in the circumferential direction of the rubber crawler. With this raised portion 16, the contact area between the tooth portion 32 and the crawler body 10 can be increased, and the surface pressure applied by the tooth portion 32 can be reduced.
- the groove part 36 is formed between a pair of drive projection parts 14 and 14, these groove parts 36 are clogged between the recessed part 20 and a pair of drive projection parts 14 and 14 in mud, gravel, etc. It is formed for so-called mud removal.
- FIG. 5 shows, as an example, a partial schematic development plan view of a crawler main body without a groove and a raised portion.
- FIG. 6 is a partial schematic front sectional view of the crawler body. However, the state where the tooth portion 32 of the sprocket 30 is engaged with the pair of driving projections 14 and 14 of the crawler main body 10 to apply a rotational pressing force (driving force) to the driving projection 14 is shown. A range in the width direction of the rubber crawler to which this driving force is applied is indicated by W. Since a large compressive force acts on the rubber member between the tooth portion 32 and the cored bar 12, the rubber member constituting the crawler body 10 is likely to be distorted.
- the rubber thickness between the two is designed to be appropriate.
- a steel cord (not shown) is embedded in a reinforcing layer (not shown) that surrounds the cored bar 12 from the grounding surface side and exists endlessly in the circumferential direction of the crawler body 10.
- the crawler main body 10 is configured to smoothly circulate based on the driving force received from the sprocket 30 while restricting the circumferential extension of 10.
- the tooth portion 32 of the sprocket 30 when the tooth portion 32 of the sprocket 30 is engaged with the pair of drive protrusions 14 and 14 of the crawler body 10 and a driving force is applied to the crawler body 10, the tooth portion 32 of the sprocket 30 and the cored bar. Since a large compressive force is applied to the rubber member interposed between 12 and 12, the rubber thickness of that portion is designed to be optimal. However, as shown in FIG. 4, at the central part (core metal central part) 12b in the width direction of the crawler body of the cored bar 12 and the base end part of the projecting part 12c forming the drive projecting part 14, the rubber member The thickness was different.
- the thickness of the rubber member between the tooth part 32 and the cored bar 12 is different in a range where the tooth part 32 of the sprocket 30 exerts a driving force.
- the difference in thickness is indicated by arrows t1 and t2. Therefore, the durability of the thin rubber portion corresponding to the base end portion of the protrusion 12c of the core metal 12 is inferior to the durability of the thick rubber portion corresponding to the core metal central portion 12b. There was a concern about the end of life first.
- the present invention has been made in view of the above problems, and its object is to provide the sprocket teeth when the sprocket teeth engage with the drive protrusions of the rubber crawler and a driving force is applied to the rubber crawler.
- An object of the present invention is to provide a durable rubber crawler with a uniform rubber thickness of a rubber member interposed between a portion and a core metal.
- a rubber crawler according to claim 1 has an endless belt-like crawler body, and a core metal embedded in the crawler body at a predetermined interval in the circumferential direction.
- the cored bar has a central portion, a pair of protrusions formed with the central portion interposed therebetween, and a wing portion extending a predetermined length on both sides of the base end portion of the pair of protrusions.
- the wing portion extends in the width direction of the crawler body, and the rubber member constituting the rubber crawler body is formed on the pair of protrusions.
- a pair of drive projections are formed so as to project on the inner peripheral surface side of the rubber crawler, and a pressing force is applied to the pair of drive projections by the rotation operation of the sprocket teeth to rotate the crawler body.
- the core metal is The width in the circumferential direction of the central portion existing between the pair of protrusions is made shorter than the width in the circumferential direction of the wing portion of the core metal, and at least to both outer sides of the base end portions of the pair of protrusions. It is characterized by being constant.
- the sprocket tooth portion exerts a driving force across the pair of drive protrusions.
- the rubber thickness of the rubber member existing between the sprocket tooth portion and the embedded core metal is uniform.
- the width of the core bar in the circumferential direction of the rubber crawler changes at the portion of the driving projection so far.
- the rubber member in the portion covering the protrusions is distorted and causes deterioration of the rubber member.
- the above configuration allows a uniform compressive force to be applied to the rubber member, resulting in an unfavorable rubber thickness. The deterioration of the rubber member due to the uniformity is prevented, and the durability of the rubber crawler is improved. Further, by reducing the central portion of the core bar, the core bar can be reduced in weight.
- the rubber crawler according to claim 2 is the rubber crawler according to claim 1, wherein a boundary portion between the central portion of the core metal and the wing portion is connected with a predetermined curvature.
- the predetermined curvature is preferably, for example, a curvature radius of 2 mm or more.
- the curvature radius is set to 1 mm or less, stress concentrates on the boundary portion and rubber cracks are likely to occur inside the crawler body. Therefore, when the weight of the traveling machine body or the like is applied to the crawler main body, it is possible to prevent the concentration of stress at the boundary between the central portion and the wing portion where the width of the core metal in the crawler circumferential direction is constant. Thus, it is possible to improve the durability of the rubber crawler.
- the thickness of the rubber member interposed between the tooth portion and the cored bar is uniform when the tooth portion of the sprocket is engaged with the drive protrusion and a rotational pressing force is applied.
- the compressive force is uniformly applied to the rubber member, the durability of the rubber crawler is improved, and the traveling machine body can be used for work and the like with confidence over a long period of time.
- FIG. 4 is a partial schematic plan view of a crawler body according to an embodiment of the rubber crawler of the present invention.
- FIG. 4 is a partial schematic side sectional view of a crawler body according to an embodiment of a rubber crawler of the present invention. However, the state where the tooth portion of the sprocket is engaged with the drive protrusion of the crawler body is shown.
- It is a partial schematic side cross-sectional view of a crawler body according to a conventional rubber crawler. However, the state where the tooth portion of the sprocket is engaged with the drive protrusion of the crawler body is shown.
- FIG. 5 is a partial schematic plan view of a crawler body related to a conventional rubber crawler.
- FIG. 5 is a partial schematic plan view of a crawler body related to a conventional rubber crawler. However, it shows as an example about a thing without a groove part and a protruding part. It is a partial schematic front sectional view of a crawler body according to a conventional rubber crawler. However, the state where the tooth portion of the sprocket is engaged with the driving protrusion of the crawler body and the driving force is applied is shown.
- FIG. 1 relates to the rubber crawler of the present invention and is a partially schematic plan view of the crawler body.
- the portion where the cored bar is present is mainly shown.
- FIG. 2 is a partial schematic side view of the crawler body according to the rubber crawler of the present invention.
- the crawler body 10 shows an example in which the groove portion 36 and the raised portion 16 exist, and
- FIG. 2 shows that the tooth portion 32 of the sprocket 30 is engaged with the driving projection portion 14 and exerts a driving force. Show the state.
- the cored bar 12 is substantially the same except for a part of that shown in the background art. That is, the wing portion 12a is embedded in the circumferential direction of the crawler main body 10 at a predetermined interval in a manner that extends in the width direction of the crawler main body 10. On the inner peripheral surface side of the crawler body 10 and between the cored bar 12, a recess 20 is formed in which the tooth part 32 of the sprocket 30 is engaged.
- the recess 20 is formed in a substantially rectangular shape at the center in the rubber crawler width direction.
- the pair of protrusions 12c and 12c of the cored bar 12 are formed to protrude inward in the circumferential direction of the crawler body 10 and are covered with a rubber member to form a pair of drive protrusions 14 and 14.
- flat portions 18 between the protrusions and raised portions 16, 16 are formed on both sides of the flat portion 18 between the protrusions in the circumferential direction of the rubber crawler.
- the contact area between the tooth portion 32 and the crawler body 10 can be increased by the raised portion 16, and the surface pressure applied by the tooth portion 32 can be reduced.
- the groove part 36 is formed between a pair of drive projection parts 14 and 14, in these groove parts 36, mud, gravel, etc.
- the inner peripheral surface of the crawler main body 10 is positioned for positioning the cored bar 12 when manufacturing the rubber rubber crawler or when the crawler main body 10 is wound around the sprocket 30 or idler (not shown) and the rubber member is deformed. It is formed to prevent the strain from concentrating on the part.
- the core metal 12 of the present invention is different from the conventional core metal in the circumferential width of the rubber crawler.
- the central portion 12b of the metal core extends in the rubber crawler width direction with a constant width, and the width in the circumferential direction of the rubber crawler at the base end portion of the protrusion 12c of the metal core 12 constituting the drive protrusion 14 is small.
- the width in the circumferential direction of the rubber crawler changed within a range in which the driving force was exerted. Therefore, in the range where the driving force is applied, the thickness of the rubber member interposed between the tooth portion 32 and the cored bar 12 is different and not uniform.
- the metal core 12 has a width outside the range in which the proximal end portion of the projection 12c is in the rubber crawler width direction, that is, outside the range where the tooth portion 32 of the sprocket 30 outside the drive projection 14 exerts the driving force.
- the width in the circumferential direction of the rubber crawler is constant.
- the thickness of the rubber member of the core metal 12 and the tooth portion 32 is uniform within a range in which the tooth portion 32 of the sprocket 30 exerts a driving force.
- the rubber member covering the driving projection 14 and the pair of driving projections 14 and 14 exist.
- the rubber member constituting the wall portion of the recessed portion 20 is deformed by the pressing force, but the distance between the tooth portion 32 and the cored bar 12 is constant.
- the strength of the outer side of the base end portion of the protruding portion 12c of the core metal 12 is ensured, and the thickness of the rubber member interposed between the tooth portion 32 and the core metal 12 when a driving force is applied is constant.
- the range to be performed is preferably up to the outer side of the base end portion of the protruding portion 12c of the cored bar 12.
- the width of the core 12 is shortened beyond the base end outside of the projection 12c of the core 12 to the outside. Also good. In this case, the core metal 12 can be further reduced in weight.
- the lengths of the regions extending in the width direction of the crawler main body 10 of the central portion 12b of the cored bar 12 are indicated by Wp and W1.
- Wp relates to the metal core shown in the background art
- W1 relates to the metal core 12 according to the present invention.
- W1 is a range to both outer sides of the base end part of the projection part 12c.
- the cored bar 12 of the present invention has a longer length of the central part 12b than the conventional cored bar. Thereby, the durability of the rubber crawler is improved as described above, and the weight of the core metal is reduced.
- the core metal 12 has a circumferential width of the crawler main body of the wing portion 12 a so that the rotation pressing force by the tooth portion 32 is applied through a rubber member constituting the rubber crawler main body 10. It is configured to be larger than the width in the direction. Therefore, the durability of the crawler body 10 can be improved without lowering the effect of the steel cord (not shown) embedded in the crawler body 10. That is, the adhesiveness between the steel cord and the cored bar 12 can be improved by making the width of the wing 12a in the circumferential direction of the rubber crawler larger than the central part 12a of the cored bar.
- the crawler body 10 can smoothly rotate based on the driving force received from the sprocket 30 while restricting the extension of the crawler.
- the wing part 12a of the cored bar 12 and the central part 12b of the cored bar are connected with a predetermined curvature.
- the predetermined curvature is preferably, for example, a curvature radius of 2 mm or more.
- the circumferential width of the rubber crawler in the range where the tooth portion 32 of the sprocket 30 between the pair of drive protrusions 14 and 14 of the core metal 12 exerts the driving force is constant.
- the tooth portion 32 engages with the pair of drive protrusions 14 and 14 formed on the inner peripheral surface of the crawler body 10 and a driving force is applied to the recess 20 and the drive protrusion 14, the tooth portion 32 and the core
- the distance from the gold 12 is constant. Therefore, since the thickness of the rubber member interposed between them is uniform, the compressive force applied to the rubber member between them is uniform, and the thin rubber member due to the mixture of the thin part and the thick part of the rubber member. The fear of deterioration is eliminated. Therefore, the rubber crawler 8 has a long life and can be used with peace of mind.
Abstract
Description
10 クローラ本体
12 芯金
12a 翼部
12b 芯金中央部
12c 突起部
14 駆動突起部
16 隆起部
18 突起部間平坦部
20 凹部
20a 凹部底面
22 芯金底面
26 ラグ部
30 スプロケット
32 歯部
36 溝部
A 回転方向
E 接地面
t1、t2 ゴム厚 8
Claims (2)
- 無端帯状のクローラ本体と、該クローラ本体内に、その周方向に所定の間隔を置いて埋設された芯金と、を有し、
前記芯金は、中央部と、該中央部を挟んで形成された一対の突起部と、該一対の突起部の基端部の更に両側に所定の長さ伸長する翼部と、を有し、
前記芯金が前記ゴムクローラ本体内に埋設された状態では、前記翼部が前記クローラ本体の幅方向に延在すると共に、前記一対の突起部に前記ゴムクローラ本体を構成するゴム部材が被覆されて一対の駆動突起部が前記ゴムクローラの内周面側に突出形成され、該一対の駆動突起部にスプロケットの歯部の回転動作による押圧力が付与されて前記クローラ本体が周回駆動されるゴムクローラにおいて、
前記芯金は、前記一対の突起部の間に存在する前記中央部の周方向の幅を、前記芯金の翼部の周方向の幅よりも短くし、少なくとも前記一対の突起部の基端部の両外側までは一定としたこと特徴とするゴムクローラ。 An endless belt-like crawler body, and a cored bar embedded in the crawler body at a predetermined interval in the circumferential direction,
The metal core has a central part, a pair of protrusions formed with the central part interposed therebetween, and a wing part extending a predetermined length on both sides of the base end part of the pair of protrusions. ,
In a state where the core metal is embedded in the rubber crawler main body, the wing portion extends in the width direction of the crawler main body, and the pair of protrusions are covered with a rubber member constituting the rubber crawler main body. A pair of driving projections projectingly formed on the inner peripheral surface side of the rubber crawler, and a pressing force is applied to the pair of driving projections by the rotation of the sprocket teeth to rotate the crawler body. In the crawler,
The core metal has a circumferential width between the pair of projections that is shorter than a circumferential width of the wings of the core metal, and at least the base ends of the pair of projections A rubber crawler characterized by being constant up to both outer sides. - 前記芯金の中央部と前記翼部との境界部は、所定の曲率を持って繋がっていることを特徴とする請求項1に記載のゴムクローラ。 The rubber crawler according to claim 1, wherein a boundary portion between the central portion of the core metal and the wing portion is connected with a predetermined curvature.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080041482.5A CN102498029B (en) | 2009-09-16 | 2010-09-16 | Rubber belt track |
KR1020127009439A KR101395422B1 (en) | 2009-09-16 | 2010-09-16 | Rubber crawler |
JP2011531958A JP5604436B2 (en) | 2009-09-16 | 2010-09-16 | Rubber crawler |
IN2070DEN2012 IN2012DN02070A (en) | 2009-09-16 | 2012-03-07 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009213975 | 2009-09-16 | ||
JP2009-213975 | 2009-09-16 |
Publications (1)
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WO2011034125A1 true WO2011034125A1 (en) | 2011-03-24 |
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ID=43758726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/066025 WO2011034125A1 (en) | 2009-09-16 | 2010-09-16 | Rubber crawler |
Country Status (5)
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JP (1) | JP5604436B2 (en) |
KR (1) | KR101395422B1 (en) |
CN (1) | CN102498029B (en) |
IN (1) | IN2012DN02070A (en) |
WO (1) | WO2011034125A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013141087A1 (en) * | 2012-03-22 | 2013-09-26 | 株式会社ブリヂストン | Rubber track |
CN103492258A (en) * | 2011-04-05 | 2014-01-01 | 株式会社普利司通 | Crawler travel device and elastic crawler |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018135643A1 (en) * | 2017-01-20 | 2018-07-26 | 株式会社ブリヂストン | Rubber crawler, rubber crawler moulding die, and method for producing rubber crawler |
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JP2000142505A (en) * | 1998-11-16 | 2000-05-23 | Bridgestone Corp | Low-vibrational rubber crawler |
JP2001055180A (en) * | 1999-08-17 | 2001-02-27 | Bridgestone Corp | Core metal for rubber crawler |
JP2009078796A (en) * | 2007-09-05 | 2009-04-16 | Bridgestone Corp | Rubber crawler and sprocket suitable for the same |
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JPH0288889U (en) * | 1988-07-13 | 1990-07-13 | ||
JPH07137670A (en) * | 1993-11-19 | 1995-05-30 | Bridgestone Corp | Core bar for rubber crawler |
JP4233159B2 (en) * | 1998-11-04 | 2009-03-04 | 株式会社ブリヂストン | Rubber corer and inner drive type rubber tracker using the same |
DE60321339D1 (en) * | 2002-05-29 | 2008-07-10 | Bridgestone Corp | RUBBER CHAIN FROM RUBBER |
JP4522104B2 (en) * | 2004-02-02 | 2010-08-11 | 福山ゴム工業株式会社 | Rubber track corer |
JP5097482B2 (en) * | 2007-09-04 | 2012-12-12 | 株式会社ブリヂストン | Rubber crawler and core for rubber crawler |
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2010
- 2010-09-16 WO PCT/JP2010/066025 patent/WO2011034125A1/en active Application Filing
- 2010-09-16 JP JP2011531958A patent/JP5604436B2/en active Active
- 2010-09-16 KR KR1020127009439A patent/KR101395422B1/en active IP Right Grant
- 2010-09-16 CN CN201080041482.5A patent/CN102498029B/en active Active
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2012
- 2012-03-07 IN IN2070DEN2012 patent/IN2012DN02070A/en unknown
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JP2000142505A (en) * | 1998-11-16 | 2000-05-23 | Bridgestone Corp | Low-vibrational rubber crawler |
JP2001055180A (en) * | 1999-08-17 | 2001-02-27 | Bridgestone Corp | Core metal for rubber crawler |
JP2009078796A (en) * | 2007-09-05 | 2009-04-16 | Bridgestone Corp | Rubber crawler and sprocket suitable for the same |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103492258A (en) * | 2011-04-05 | 2014-01-01 | 株式会社普利司通 | Crawler travel device and elastic crawler |
CN103492258B (en) * | 2011-04-05 | 2016-01-20 | 株式会社普利司通 | Crawler travel device and resilient track |
WO2013141087A1 (en) * | 2012-03-22 | 2013-09-26 | 株式会社ブリヂストン | Rubber track |
US20150048672A1 (en) * | 2012-03-22 | 2015-02-19 | Bridgestone Corporation | Rubber crawler |
EP2829461A4 (en) * | 2012-03-22 | 2016-05-11 | Bridgestone Corp | Rubber track |
AU2013236442B2 (en) * | 2012-03-22 | 2016-06-09 | Bridgestone Corporation | Rubber Crawler |
US9446806B2 (en) | 2012-03-22 | 2016-09-20 | Bridgestone Corporation | Rubber crawler |
Also Published As
Publication number | Publication date |
---|---|
IN2012DN02070A (en) | 2015-08-21 |
JPWO2011034125A1 (en) | 2013-02-14 |
KR101395422B1 (en) | 2014-05-14 |
JP5604436B2 (en) | 2014-10-08 |
CN102498029A (en) | 2012-06-13 |
CN102498029B (en) | 2016-03-30 |
KR20120054094A (en) | 2012-05-29 |
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