WO2011034125A1 - Chenille en caoutchouc - Google Patents

Chenille en caoutchouc Download PDF

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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
Application number
PCT/JP2010/066025
Other languages
English (en)
Japanese (ja)
Inventor
穣 安孫子
Original Assignee
株式会社ブリヂストン
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 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to KR1020127009439A priority Critical patent/KR101395422B1/ko
Priority to CN201080041482.5A priority patent/CN102498029B/zh
Priority to JP2011531958A priority patent/JP5604436B2/ja
Publication of WO2011034125A1 publication Critical patent/WO2011034125A1/fr
Priority to IN2070DEN2012 priority patent/IN2012DN02070A/en

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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.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne une chenille en caoutchouc; l'épaisseur du caoutchouc d'un élément en caoutchouc placé entre un mandrin et une section dentée d'un pignon est uniforme, résultant en une durabilité obtenue dans une situation où la section dentée du pignon vient en prise avec une saillie d'entraînement, ce qui amène à l'application d'une force d'entraînement à la chenille en caoutchouc. Ladite chenille en caoutchouc est conçue de façon qu'avec le mandrin (12) installé à l'intérieur d'un corps de chenille en caoutchouc (10), une section aile (12a) est située dans le sens de la largeur du corps de chenille en caoutchouc (10); qu'en outre une paire de saillies (12c, 12c) est recouverte de l'élément caoutchouc, et une paire de saillies d'entraînement (14, 14) est formée sur le côté périphérique interne du corps de chenille en caoutchouc (10); et que la force de pression, du fait du mouvement de rotation de la section dentée (32) du pignon, est exercée sur la paire de saillies d'entraînement (14, 14) résultant en ce que la chenille en caoutchouc est entraînée en rotation. Dans cette chenille en caoutchouc, le mandrin (12) est formé de manière que la largeur périphérique de la section centrale (12b), se trouvant entre la paire de saillies (12c, 12c) est plus courte que la largeur de la section aile (12a) du mandrin (12) et est constante, du moins jusqu'aux deux côtés extérieurs des extrémités de base de la paire de saillies (12c, 12c).
PCT/JP2010/066025 2009-09-16 2010-09-16 Chenille en caoutchouc WO2011034125A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020127009439A KR101395422B1 (ko) 2009-09-16 2010-09-16 고무 크롤러
CN201080041482.5A CN102498029B (zh) 2009-09-16 2010-09-16 橡胶履带
JP2011531958A JP5604436B2 (ja) 2009-09-16 2010-09-16 ゴムクローラ
IN2070DEN2012 IN2012DN02070A (fr) 2009-09-16 2012-03-07

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-213975 2009-09-16
JP2009213975 2009-09-16

Publications (1)

Publication Number Publication Date
WO2011034125A1 true WO2011034125A1 (fr) 2011-03-24

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ID=43758726

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/066025 WO2011034125A1 (fr) 2009-09-16 2010-09-16 Chenille en caoutchouc

Country Status (5)

Country Link
JP (1) JP5604436B2 (fr)
KR (1) KR101395422B1 (fr)
CN (1) CN102498029B (fr)
IN (1) IN2012DN02070A (fr)
WO (1) WO2011034125A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013141087A1 (fr) * 2012-03-22 2013-09-26 株式会社ブリヂストン Piste de caoutchouc
CN103492258A (zh) * 2011-04-05 2014-01-01 株式会社普利司通 履带行进装置和弹性履带

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3051070A1 (fr) * 2017-01-20 2018-07-26 Bridgestone Corporation Chenille en caoutchouc, moule de chenille en caoutchouc et methode de production de chenille en caoutchouc

Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2000142505A (ja) * 1998-11-16 2000-05-23 Bridgestone Corp 低振動ゴムクローラ
JP2001055180A (ja) * 1999-08-17 2001-02-27 Bridgestone Corp ゴムクローラ用芯金
JP2009078796A (ja) * 2007-09-05 2009-04-16 Bridgestone Corp ゴムクローラ及びこれに適したスプロケット

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JPH0288889U (fr) * 1988-07-13 1990-07-13
JPH07137670A (ja) * 1993-11-19 1995-05-30 Bridgestone Corp ゴムクロ−ラ用芯金
JP4233159B2 (ja) * 1998-11-04 2009-03-04 株式会社ブリヂストン ゴムクロ−ラ用芯金及びこれを用いた内駆動型ゴムクロ−ラ
JP4295721B2 (ja) * 2002-05-29 2009-07-15 株式会社ブリヂストン ゴムクローラ
JP4522104B2 (ja) * 2004-02-02 2010-08-11 福山ゴム工業株式会社 ゴムクローラ用芯金
JP5097482B2 (ja) * 2007-09-04 2012-12-12 株式会社ブリヂストン ゴムクローラおよびそのゴムクローラ用芯金

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Publication number Priority date Publication date Assignee Title
JP2000142505A (ja) * 1998-11-16 2000-05-23 Bridgestone Corp 低振動ゴムクローラ
JP2001055180A (ja) * 1999-08-17 2001-02-27 Bridgestone Corp ゴムクローラ用芯金
JP2009078796A (ja) * 2007-09-05 2009-04-16 Bridgestone Corp ゴムクローラ及びこれに適したスプロケット

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103492258A (zh) * 2011-04-05 2014-01-01 株式会社普利司通 履带行进装置和弹性履带
CN103492258B (zh) * 2011-04-05 2016-01-20 株式会社普利司通 履带行进装置和弹性履带
WO2013141087A1 (fr) * 2012-03-22 2013-09-26 株式会社ブリヂストン Piste de caoutchouc
US20150048672A1 (en) * 2012-03-22 2015-02-19 Bridgestone Corporation Rubber crawler
EP2829461A4 (fr) * 2012-03-22 2016-05-11 Bridgestone Corp Piste de caoutchouc
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
CN102498029A (zh) 2012-06-13
KR101395422B1 (ko) 2014-05-14
KR20120054094A (ko) 2012-05-29
IN2012DN02070A (fr) 2015-08-21
JP5604436B2 (ja) 2014-10-08
JPWO2011034125A1 (ja) 2013-02-14
CN102498029B (zh) 2016-03-30

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