JP2003182655A - Crawler belt bush and crawler belt - Google Patents
Crawler belt bush and crawler beltInfo
- Publication number
- JP2003182655A JP2003182655A JP2001390351A JP2001390351A JP2003182655A JP 2003182655 A JP2003182655 A JP 2003182655A JP 2001390351 A JP2001390351 A JP 2001390351A JP 2001390351 A JP2001390351 A JP 2001390351A JP 2003182655 A JP2003182655 A JP 2003182655A
- Authority
- JP
- Japan
- Prior art keywords
- longitudinal direction
- elastic body
- connecting pin
- tube body
- crawler belt
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建設、土木業等に
おいて、作業機械の走行装置に使用される履帯用ブッシ
ュおよびこの履帯用ブッシュを備えた履帯に関し、より
具体的には、連結ピンによって連結される履板の連結ピ
ン挿通孔に圧入される履帯用ブッシュと、この履帯用ブ
ッシュを備えた履帯に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler belt bush used for a traveling device of a work machine in construction, civil engineering, etc., and a crawler belt provided with the crawler bush, and more specifically, by a connecting pin. The present invention relates to a crawler belt bush press-fitted into a coupling pin insertion hole of a crawler plate to be coupled, and a crawler belt including the crawler belt bush.
【０００２】[0002]
【従来の技術】図１２は、従来の履帯の一例（以下、従
来例という）を示している。図１２において、履帯３０
は複数の履板３１と、履板３１同士を連結する連結ピン
３２と、連結ピン３２を通すために履板３１に設けられ
た連結ピン挿通孔３８に圧入される履帯用ブッシュ３３
とから構成されている。この履帯用ブッシュ３３は、履
帯１の走行抵抗を減少、また、走行時の車両騒音を減少
させる等の目的からこの連結ピン挿通孔３８に圧入され
るものである。2. Description of the Related Art FIG. 12 shows an example of a conventional crawler belt (hereinafter referred to as a conventional example). In FIG. 12, crawler belt 30
Is a plurality of crawler plates 31, a connecting pin 32 for connecting the crawler plates 31 to each other, and a crawler belt bush 33 which is press-fitted into a connecting pin insertion hole 38 provided in the crawler plate 31 for passing the connecting pin 32.
It consists of and. The crawler belt bush 33 is press-fitted into the connecting pin insertion hole 38 for the purpose of reducing running resistance of the crawler belt 1 and reducing vehicle noise during running.
【０００３】この履帯用ブッシュ３３は、連結ピン３２
が挿通される菅体３４と、この菅体３４の外周に設けら
れた、ゴム等による環状弾性体３５とから構成されてお
り、環状弾性体３５は、外形が円柱状に形成されて菅体
３４と同心状に配置され、菅体３４に複数個（図例では
４個）加硫接着されている。環状弾性体３５の外形が円
柱状とされていることにより、環状弾性体３５の外側面
３６は、履帯用ブッシュ３３が連結ピン挿通孔３８に圧
入されるときに、連結ピン挿通孔３８の孔壁３８ａと平
行となる面（以下、平行面という）となっていた。The crawler belt bush 33 includes a connecting pin 32.
And a ring-shaped elastic body 35 made of rubber or the like provided on the outer periphery of the tube body 34. The ring-shaped elastic body 35 has a cylindrical outer shape. It is arranged concentrically with 34 and is vulcanized and adhered to the tube body 34 in a plurality (four in the illustrated example). Since the outer shape of the annular elastic body 35 is cylindrical, the outer surface 36 of the annular elastic body 35 has a hole of the connecting pin insertion hole 38 when the crawler belt bush 33 is press-fitted into the connecting pin insertion hole 38. The surface is parallel to the wall 38a (hereinafter referred to as parallel surface).
【０００４】図１３は、履帯用ブッシュ３３が連結ピン
挿通孔３８に圧入された状態を示している。履帯用ブッ
シュ３３が連結ピン挿通孔３８に圧入されると、図１３
に示すように環状弾性体３５が変形していた。すなわ
ち、環状弾性体３５において、連結ピン挿通孔３８の孔
壁３８ａと接触（圧接）している部分４２（以下、接触
部４２という）は圧入されたときに加わる圧力により圧
縮されて菅体長手方向（以下、長手方向という）の接触
幅ａが、より幅広となるように変形していた。FIG. 13 shows a state in which the crawler belt bush 33 is press-fitted into the connecting pin insertion hole 38. When the crawler belt bush 33 is press-fitted into the connecting pin insertion hole 38, FIG.
The annular elastic body 35 was deformed as shown in FIG. That is, in the annular elastic body 35, a portion 42 (hereinafter, referred to as a contact portion 42) of the connecting pin insertion hole 38 which is in contact (press contact) with the hole wall 38a is compressed by the pressure applied at the time of press fitting, so that the tubular body longitudinal direction. The contact width a in the direction (hereinafter referred to as the longitudinal direction) was deformed to be wider.
【０００５】そして、この接触幅ａは、環状弾性体３５
において、菅体３４に接着されている部分４３（以下、
接着部４３という）の長手方向の接着幅ｂより大きくな
っていた。つまり、環状弾性体３５は、連結ピン挿通孔
３８に圧入されると接着部４３の長手方向端部４４がく
びれた形状に変形していた（以下、この変形をくびれ状
の変形という場合がある）。The contact width a is equal to the annular elastic body 35.
At the portion 43 (hereinafter,
It was larger than the adhesive width b in the longitudinal direction of the adhesive portion 43). That is, when the annular elastic body 35 is press-fitted into the connecting pin insertion hole 38, the longitudinal end portion 44 of the adhesive portion 43 is deformed into a constricted shape (hereinafter, this deformation may be referred to as a constricted deformation. ).
【０００６】[0006]
【発明が解決しようとする課題】環状弾性体がこのよう
に変形することで、走行時の振動等によって、接着部４
３の長手方向端部４４に応力が集中し、この端部４４が
剥離しやすくなり、環状弾性体３５の菅体３４からの剥
離が早まって履帯用ブッシュ３３の寿命が短くなるとい
う問題点があった。また、接触部４２には矢印ｃ、ｄで
示すように長手方向両方に引き伸ばされるような力が作
用し、これにより、接触部４２に亀裂が生じやすくなっ
てしまい、履帯用ブッシュ３３の寿命が短くなるという
問題点があった。The deformation of the annular elastic body in this manner causes the adhesive portion 4 to be deformed due to vibration during traveling.
The stress is concentrated on the longitudinal end portion 44 of the No. 3, the end portion 44 is easily peeled off, the annular elastic body 35 is peeled off from the tube body 34 quickly, and the life of the track bush 33 is shortened. there were. Further, as shown by the arrows c and d, a force that stretches both in the longitudinal direction acts on the contact portion 42, which easily causes cracks in the contact portion 42 and the life of the track bush 33. There was a problem of shortening.
【０００７】上述のように、履帯用ブッシュ３３の寿命
が短くては、頻繁に履帯用ブッシュ３３を交換しなけれ
ばならず履帯の保守が煩わしくなるという問題点があっ
た。そこで、本発明は、前記接着部４３の剥離を防止し
て寿命を延長した履帯用ブッシュを提供することを目的
とする。本発明の他の目的は、前記接触部４２における
亀裂の発生を防止して寿命を延長した履帯用ブッシュを
提供することである。本発明の他の目的は、履帯用ブッ
シュの寿命を延長することで、保守性を向上させた履帯
を提供することを目的とする。As described above, if the life span of the crawler belt bush 33 is short, the crawler belt bush 33 must be frequently replaced, which makes maintenance of the crawler belt cumbersome. Therefore, an object of the present invention is to provide a crawler belt bushing that prevents the adhesive portion 43 from peeling and extends the life thereof. It is another object of the present invention to provide a crawler belt bush that prevents the occurrence of cracks in the contact portion 42 and extends its life. Another object of the present invention is to provide a crawler belt having improved maintainability by extending the life of the bush for the crawler belt.
【０００８】[0008]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、以下の技術的手段を講じた。すなわち、
第１の技術的手段としては、相対する履板２を連結する
ための連結ピン４が挿通される菅体８と、菅体８外面に
固着され、かつ、菅体８径方向に厚みを有する環状弾性
体９から構成され、履板２に設けられた連結ピン挿通孔
５に圧入される履帯用ブッシュ７において、前記環状弾
性体９は、菅体８長手方向両側で径内方に傾斜して菅体
８長手方向に広がる斜面１７を有していることである。In order to solve the above problems, the present invention takes the following technical means. That is,
As a first technical means, a tube body 8 through which a connecting pin 4 for connecting the opposite track plates 2 is inserted, and a tube body 8 fixed to the outer surface of the tube body 8 and having a thickness in the radial direction of the tube body 8. In a crawler belt bush 7 which is composed of an annular elastic body 9 and is press-fitted into a connecting pin insertion hole 5 provided in the crawler plate 2, the annular elastic body 9 is inclined radially inward on both sides in the longitudinal direction of the tube body 8. That is, it has a slope 17 that extends in the longitudinal direction of the tubular body 8.
【０００９】前述した従来例では、環状弾性体３５の外
側面３６は、履帯用ブッシュ３３が連結ピン挿通孔３８
に圧入されるときに、連結ピン挿通孔３８の孔壁３８ａ
と平行となる平行面となっていた。しかし、この第１の
技術的手段によれば、環状弾性体９に前記斜面１７を形
成することにより、環状弾性体９が履板２の連結ピン挿
通孔５に圧入されたときに、連結ピン挿通孔５の孔壁５
ａに押されて変形する環状弾性体９の量（体積）を従来
例よりも減らすことができ、環状弾性体９がくびれ状に
変形することを防止することができる。In the above-mentioned conventional example, the crawler belt bush 33 is provided on the outer side surface 36 of the annular elastic body 35 with the connecting pin insertion hole 38.
Hole wall 38a of the connecting pin insertion hole 38 when it is pressed into
It was a parallel plane parallel to. However, according to this first technical means, by forming the inclined surface 17 on the annular elastic body 9, when the annular elastic body 9 is press-fitted into the connecting pin insertion hole 5 of the shoe plate 2, the connecting pin is inserted. Hole wall 5 of insertion hole 5
The amount (volume) of the annular elastic body 9 that is pressed and deformed by a can be reduced as compared with the conventional example, and the annular elastic body 9 can be prevented from being deformed into a constricted shape.
【００１０】また、環状弾性体９が変形する量を減らす
ことで、従来例のように連結ピン挿通孔５の孔壁５ａと
の接触部１９に作用していた菅体８長手方向両方に引き
伸ばすような力が低減することになり、この接触部１９
に亀裂が生じにくくなる。このように環状弾性体９が変
形する体積を減らすことで、環状弾性体９がくびれ状に
変形することを抑えて、環状弾性体９において菅体８に
固着された固着部の剥離を防止することができ、そして
前記接触部１９に亀裂が生じにくくすることもでき、こ
こに履帯用ブッシュ７の寿命を延長することができるの
である。Further, by reducing the amount of deformation of the annular elastic body 9, the tubular body 8 which is acting on the contact portion 19 with the hole wall 5a of the connecting pin insertion hole 5 as in the conventional example is extended in both longitudinal directions. Such a force is reduced, and this contact portion 19
Cracks are less likely to occur. By reducing the volume of deformation of the annular elastic body 9 in this manner, it is possible to prevent the annular elastic body 9 from being deformed in a constricted shape, and to prevent peeling of a fixed portion fixed to the tube body 8 in the annular elastic body 9. It is possible to prevent the contact portion 19 from cracking, and the life of the track bush 7 can be extended.
【００１１】第２の技術的手段としては、相対する履板
２を連結するための連結ピン４が挿通される菅体８と、
菅体８外面に固着され、かつ、菅体８径方向に厚みを有
する環状弾性体９から構成され、履板２に設けられた連
結ピン挿通孔５に圧入される履帯用ブッシュ７におい
て、前記環状弾性体９は、菅体８長手方向両側で径内方
に傾斜して菅体８長手方向に広がる斜面１７を有してお
り、前記環状弾性体９は菅体８の長手方向に間隔をおい
て複数設けられ、または、連続状に設けられていること
が望ましい。As a second technical means, a tube body 8 through which a connecting pin 4 for connecting the opposite track plates 2 is inserted,
The crawler belt bush 7 fixed to the outer surface of the tube body 8 and composed of an annular elastic body 9 having a thickness in the radial direction of the tube body 8 and press-fitted into the connecting pin insertion hole 5 provided in the crawler plate 2, The annular elastic body 9 has slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, and the annular elastic body 9 is spaced apart in the longitudinal direction of the tubular body 8. It is desirable that a plurality of them be provided or that they be provided continuously.
【００１２】第３の技術的手段としては、相対する履板
２を連結するための連結ピン４が挿通される菅体８と、
菅体８外面に固着され、かつ、菅体８径方向に厚みを有
する環状弾性体９から構成され、履板２に設けられた連
結ピン挿通孔５に圧入される履帯用ブッシュ７におい
て、前記環状弾性体９の外面は、凸部１４と凹部１５が
菅体８長手方向に交互に形成された蛇腹状とされてお
り、凸部１４は、菅体８長手方向両側で径内方に傾斜し
て菅体８長手方向に広がる斜面１７を有していることで
ある。As a third technical means, a tube body 8 into which a connecting pin 4 for connecting the opposite track plates 2 is inserted,
The crawler belt bush 7 fixed to the outer surface of the tube body 8 and composed of an annular elastic body 9 having a thickness in the radial direction of the tube body 8 and press-fitted into the connecting pin insertion hole 5 provided in the crawler plate 2, The outer surface of the annular elastic body 9 has a bellows shape in which convex portions 14 and concave portions 15 are alternately formed in the longitudinal direction of the tubular body 8, and the convex portions 14 are inclined radially inward on both sides in the longitudinal direction of the tubular body 8. That is, it has a slope 17 that extends in the longitudinal direction of the tubular body 8.
【００１３】これによれば、履帯用ブッシュ７が、連結
ピン挿通孔５に圧入されたときには、蛇腹状とされた環
状弾性体９の凸部１４が連結ピン挿通孔５の孔壁５ａに
接触することとなる。この凸部１４には、菅体８長手方
向両側で径内方に傾斜して菅体８長手方向に広がる斜面
１７が形成されているので、従来例のように環状弾性体
（３５）が円柱状とされ、その外側面が、連結ピン挿通
孔の孔壁と平行な面（平行面）とされている場合と比較
して、連結ピン挿通孔５の孔壁５ａに押されて変形する
環状弾性体９の量（体積）を減らすことができ、これに
より環状弾性体９がくびれ状に変形することを防止する
ことができる。According to this, when the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5, the convex portion 14 of the annular elastic body 9 in a bellows shape contacts the hole wall 5a of the connecting pin insertion hole 5. Will be done. Since the convex portions 14 are formed with slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, the annular elastic body (35) is circular as in the conventional example. An annular shape that is pushed and deformed by the hole wall 5a of the connecting pin insertion hole 5 as compared to the case where the outer surface is columnar and the surface is parallel to the hole wall of the connecting pin insertion hole (parallel surface). The amount (volume) of the elastic body 9 can be reduced, and thus the annular elastic body 9 can be prevented from being deformed into a constricted shape.
【００１４】また、環状弾性体９が変形する量を減らす
ことで、従来例のように連結ピン挿通孔の孔壁との環状
弾性体における接触部に作用していた菅体長手方向両方
に引き伸ばすような力が低減することになり、この接触
部に亀裂が生じにくくなる。以上により、環状弾性体９
がくびれ状に変形することを抑えて、環状弾性体９の菅
体８からの剥離を防止することができ、そして前記接触
部１９に亀裂が生じにくくすることもでき、ここに履帯
用ブッシュ７の寿命を延長することができるのである。Further, by reducing the amount of deformation of the annular elastic body 9, the annular elastic body 9 is stretched in both the longitudinal direction of the tubular body, which acts on the contact portion of the annular elastic body with the hole wall of the connecting pin insertion hole as in the conventional example. Such a force is reduced, and the contact portion is less likely to crack. From the above, the annular elastic body 9
It is possible to prevent the annular elastic body 9 from being separated from the tube body 8 by suppressing the deformation of the annular elastic body 9 and to prevent the contact portion 19 from cracking easily. The life of the can be extended.
【００１５】第４の技術的手段としては、相対する履板
２を連結するための連結ピン４が挿通される菅体８と、
菅体８外面に固着され、かつ、菅体８径方向に厚みを有
する環状弾性体９から構成され、履板２に設けられた連
結ピン挿通孔５に圧入される履帯用ブッシュ７におい
て、前記環状弾性体９は、大径部１１と小径部１２が菅
体８長手方向に交互に形成された蛇腹状とされており、
大径部１１は、菅体８長手方向両側で径内方に傾斜して
菅体８長手方向に広がる斜面１７を有していることであ
る。As a fourth technical means, a tube body 8 through which a connecting pin 4 for connecting the opposite track plates 2 is inserted,
The crawler belt bush 7 fixed to the outer surface of the tube body 8 and composed of an annular elastic body 9 having a thickness in the radial direction of the tube body 8 and press-fitted into the connecting pin insertion hole 5 provided in the crawler plate 2, The annular elastic body 9 has a bellows shape in which the large diameter portions 11 and the small diameter portions 12 are alternately formed in the longitudinal direction of the tubular body 8,
The large-diameter portion 11 has slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8.
【００１６】第５の技術的手段としては、第１から４の
いずれかの技術的手段に加えて、前記斜面１７のそれぞ
れは、菅体８の径外方に凸状の曲面とされており、前記
斜面１７と前記凸部１４の頂部２１（最頂部）は連続し
た曲面で形成されていることが望ましい。第６の技術的
手段としては、第１から５のいずれかの技術的手段にお
ける履帯用ブッシュ７が前記連結ピン挿通孔５に圧入さ
れたときの、環状弾性体９における、連結ピン挿通孔５
の孔壁５ａとの接触部１９の菅体８長手方向の接触幅１
９ａよりも、環状弾性体９における、菅体８との固着部
２０の菅体８長手方向の固着幅２０ａが大きいことであ
る。As a fifth technical means, in addition to any one of the first to fourth technical means, each of the slopes 17 is formed as a convex curved surface radially outward of the tube body 8. It is preferable that the slope 17 and the top 21 (topmost portion) of the convex portion 14 are formed as a continuous curved surface. As a sixth technical means, the connecting pin insertion hole 5 in the annular elastic body 9 when the crawler belt bush 7 in any one of the first to fifth technical means is press-fitted into the connecting pin insertion hole 5 is described.
Of the contact portion 19 with the hole wall 5a of the tube body 8 in the longitudinal direction 1
9a, the fixing width 20a of the fixing portion 20 of the annular elastic body 9 with the tubular body 8 in the longitudinal direction of the tubular body 8 is larger.
【００１７】このように固着部２０の菅体８長手方向の
固着幅２０ａが接触部１９の接触幅１９ａよりも大きく
なっていれば、従来例のように環状弾性体がくびれ状に
変形することがなくなり、これによって環状弾性体９の
剥離を防止して履帯用ブッシュ７の寿命を延長すること
ができる。第７の技術的手段としては、連結ピン４によ
って連結される履板２に設けられた連結ピン挿通孔５に
圧入される履帯用ブッシュ７において、前記履帯用ブッ
シュ７は、連結ピン４が挿通される菅体８と、この菅体
８の外周に環状に配設されて菅体８に固着され、かつ、
菅体８外面から***した凸状弾性体９ａから構成され、
前記凸状弾性体９ａは、菅体８長手方向両側で径内方に
傾斜して菅体８長手方向に広がる長手方向斜面１７を有
していることである。As described above, if the fixing width 20a of the fixing portion 20 in the longitudinal direction of the tube body 8 is larger than the contact width 19a of the contact portion 19, the annular elastic body is deformed into a constricted shape as in the conventional example. This prevents the annular elastic body 9 from peeling off and extends the life of the track bush 7. As a seventh technical means, in a crawler belt bush 7 press-fitted into a coupling pin insertion hole 5 provided in a crawler plate 2 coupled by a coupling pin 4, the crawler belt bush 7 has the coupling pin 4 inserted therein. And a tubular body 8 that is annularly arranged around the outer periphery of the tubular body 8 and fixed to the tubular body 8, and
Consists of a convex elastic body 9a protruding from the outer surface of the tube body 8,
The convex elastic body 9a has longitudinal slopes 17 which are inclined radially inward on both sides of the tubular body 8 in the longitudinal direction and spread in the longitudinal direction of the tubular body 8.
【００１８】これによれば、履帯用ブッシュ７が、連結
ピン挿通孔５に圧入されたときには、菅体８の外周に環
状に配設された凸状弾性体９ａが連結ピン挿通孔５の孔
壁５ａに接触することとなる。この凸状弾性体９ａに
は、菅体８長手方向両側で径内方に傾斜して菅体８長手
方向に広がる斜面１７が形成されているので、従来例の
ように環状弾性体（３５）が円柱状とされ、その外側面
が、連結ピン挿通孔５の孔壁５ａと平行な面（平行面）
とされていた場合と比較して、連結ピン挿通孔５の孔壁
５ａに押されて変形する凸状弾性体９ａの量（体積）を
従来例よりも減らすことができ、凸状弾性体９ａがくび
れ状に変形することを防止することができる。According to this, when the crawler belt bush 7 is press-fitted into the connection pin insertion hole 5, the convex elastic body 9a annularly arranged on the outer periphery of the tube body 8 is formed in the connection pin insertion hole 5. It will come into contact with the wall 5a. Since the convex elastic body 9a is formed with slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, the annular elastic body (35) is formed as in the conventional example. Has a cylindrical shape, and its outer surface is a surface parallel to the hole wall 5a of the connecting pin insertion hole 5 (parallel surface).
The amount (volume) of the convex elastic body 9a that is pressed and deformed by the hole wall 5a of the connecting pin insertion hole 5 can be reduced compared with the conventional example, and the convex elastic body 9a can be reduced. It is possible to prevent the waist from deforming like a neck.
【００１９】以上により、凸状弾性体９ａがくびれ状に
変形することを抑えて、凸状弾性体９ａの菅体８からの
剥離を防止することができ、ここに履帯用ブッシュ７の
寿命を延長することができるのである。第８の技術的手
段としては、連結ピン４によって連結される履板２に設
けられた連結ピン挿通孔５に圧入される履帯用ブッシュ
７において、前記履帯用ブッシュ７は、連結ピン４が挿
通される菅体８と、この菅体８の外周に環状に配設され
て菅体８に固着され、菅体８外面から***した凸状弾性
体９ａから構成され、前記凸状弾性体９ａは、菅体８長
手方向両側で径内方に傾斜して菅体８長手方向に広がる
斜面１７と、菅体８周方向両側で傾斜して周方向に広が
る斜面１７とを有していることである。As described above, it is possible to prevent the convex elastic body 9a from being deformed into a constricted shape and prevent the convex elastic body 9a from being separated from the tube body 8. Here, the life of the crawler belt bush 7 is improved. It can be extended. As an eighth technical means, in a crawler belt bush 7 press-fitted into a coupling pin insertion hole 5 provided in a crawler plate 2 coupled by a coupling pin 4, the crawler belt bush 7 has the coupling pin 4 inserted therein. And a convex elastic body 9a that is arranged in an annular shape around the outer circumference of the tubular body 8 and is fixed to the tubular body 8 and is raised from the outer surface of the tubular body 8. By having the slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tube body 8 and expand in the longitudinal direction of the tube body 8, and the slopes 17 that are inclined on both sides in the circumferential direction of the tube body 8 and expand in the circumferential direction. is there.
【００２０】第９の技術的手段としては、本発明におけ
る履帯は、連結ピン４によって連結される履板２を備
え、この履板２に設けられた連結ピン挿通孔５に第１か
ら８のいずれかの技術的手段を講じた履帯用ブッシュ７
が圧入されたものであることである。これによれば、本
発明における履帯には従来例よりも寿命が延長された履
帯用ブッシュ７が設けられるので、履帯用ブッシュ７の
交換回数が減って、ここに履帯の保守性を向上させるこ
とができる。As a ninth technical means, the crawler belt according to the present invention is provided with a crawler plate 2 which is connected by a connecting pin 4, and the connecting pin insertion holes 5 provided in the crawler plate 2 are provided with first to eighth members. Crawler track bushing 7 using any technical means
Is that it has been press-fitted. According to this, since the crawler belt in the present invention is provided with the crawler belt bush 7 having a longer life than that of the conventional example, the number of times of exchanging the crawler belt bush 7 is reduced and the maintainability of the crawler belt is improved. You can
【００２１】[0021]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を説明する。図１乃至図４は本発明における履
帯用ブッシュの第１実施形態を示しており、特に図１
は、本発明における履帯の実施形態の一例をも示してい
る。本発明における履帯１は、複数の履板２と、履板２
同士を連結する連結ピン４と、連結ピン４を通すために
履板２に形成された連結ピン挿通孔５に圧入される履帯
用ブッシュ７から構成される。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of a track bush according to the present invention, and in particular, FIG.
Also shows an example of an embodiment of the crawler track in the present invention. The crawler belt 1 according to the present invention includes a plurality of crawler plates 2 and a crawler plate 2
It is composed of a connecting pin 4 that connects the members to each other and a crawler belt bush 7 that is press-fitted into a connecting pin insertion hole 5 formed in the crawler plate 2 to pass the connecting pin 4.
【００２２】この履帯１は、履板２に設けられた連結ピ
ン挿通孔５に履帯用ブッシュ７を圧入し、相対する履板
２同士の連結ピン挿通孔５を重ね合わせ、これら連結ピ
ン挿通孔５（履帯用ブッシュ７）に連結ピン４を挿通
し、履板２同士を連結することにより無端帯状に組まれ
る。履帯用ブッシュ７は、連結ピン４が挿通される菅体
８と、ゴム等を材料とする環状弾性体９から構成され
る。この環状弾性体９は加硫接着により菅体８に固着さ
れ、かつ、この菅体８径方向に厚みを有している（以
下、他の実施形態において同じ）。環状弾性体９が菅体
８に固着されるのは、以下に述べる他の実施形態におい
ても同じである。In the crawler belt 1, a crawler belt bush 7 is press-fitted into a connecting pin insertion hole 5 provided in the crawler plate 2, and the connecting pin insertion holes 5 of the crawler plates 2 facing each other are overlapped with each other, and these connecting pin insertion holes are formed. By inserting the connecting pin 4 into the 5 (crawler belt bush 7) and connecting the crawler plates 2 to each other, the endless belt is assembled. The crawler belt bush 7 includes a tubular body 8 into which the connecting pin 4 is inserted and an annular elastic body 9 made of rubber or the like. The annular elastic body 9 is fixed to the tubular body 8 by vulcanization adhesion and has a thickness in the radial direction of the tubular body 8 (hereinafter, the same in other embodiments). The annular elastic body 9 is fixed to the tube body 8 in the same manner in other embodiments described below.
【００２３】図２，図３に示すように、環状弾性体９の
外面は、大径部１１と小径部１２が菅体８長手方向に交
互に形成された蛇腹状とされている。見方を変えれば、
環状弾性体９の外面は、凸部１４と凹部１５が交互に菅
体８長手方向に形成された蛇腹状とされているというこ
ともできる。前記大径部１１（凸部１４）は、菅体８長
手方向両側で径内方に傾斜して菅体８長手方向に広がる
斜面１７を有し、これら両斜面１７が交差する交差位置
が環状弾性体９の径方向最頂部２１（頂部）とされてい
る。As shown in FIGS. 2 and 3, the outer surface of the annular elastic body 9 has a bellows shape in which large diameter portions 11 and small diameter portions 12 are alternately formed in the longitudinal direction of the tubular body 8. From a different perspective,
It can also be said that the outer surface of the annular elastic body 9 has a bellows shape in which the convex portions 14 and the concave portions 15 are alternately formed in the longitudinal direction of the tubular body 8. The large-diameter portion 11 (convex portion 14) has slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tube body 8 and spread in the longitudinal direction of the tube body 8, and the intersecting positions where these slopes 17 intersect are annular. It is the radially uppermost portion 21 (top portion) of the elastic body 9.
【００２４】前記斜面１７のそれぞれは、菅体８の径外
方に凸状の曲面とされており、前記斜面１７と前記凸部
１４（大径部１１）の頂部２１（最頂部）は連続した曲
面で形成されている。このような連続した曲面であれば
凸部１４（大径部１１）の外面には凹みがなくなり、走
行時に、この履帯用ブッシュ７に加わる衝撃等に対して
環状弾性体９に亀裂が生じにくくなる。図４は、履帯用
ブッシュ７が連結ピン挿通孔５に圧入されたときの状態
を示している。Each of the slopes 17 is a curved surface that is convex outward in the radial direction of the tubular body 8, and the slopes 17 and the apex 21 (topmost part) of the convex portion 14 (large diameter portion 11) are continuous. It is formed by a curved surface. With such a continuous curved surface, the convex portion 14 (large-diameter portion 11) has no recess on the outer surface, and the annular elastic body 9 is unlikely to be cracked by a shock or the like applied to the track bush 7 during traveling. Become. FIG. 4 shows a state in which the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5.
【００２５】図４に示すように、履帯用ブッシュ７が連
結ピン挿通孔５に圧入されると、大径部１１（凸部１
４）が、連結ピン挿通孔５の孔壁５ａに押しつけられて
（圧縮されて）、図４において断面視台形状に変形する
こととなる。この第１実施形態によれば、履帯用ブッシ
ュ７が、連結ピン挿通孔５に圧入されたときには、蛇腹
状とされた環状弾性体９の大径部１１（凸部１４）が連
結ピン挿通孔５の孔壁５ａに接触することとなる（図４
参照）。この大径部１１（凸部１４）には、菅体８長手
方向両側で径内方に傾斜して菅体８長手方向に広がる斜
面１７が形成されているので、従来例のように環状弾性
体（３５）が円柱状とされ、その外側面が、連結ピン挿
通孔の孔壁と平行な面（平行面）とされている場合と比
較して、連結ピン挿通孔５の孔壁５ａに押されて変形す
る環状弾性体９の量（体積）を減らすことができ、これ
により環状弾性体９がくびれ状に変形することを防止す
ることができる。As shown in FIG. 4, when the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5, the large diameter portion 11 (convex portion 1).
4) is pressed (compressed) against the hole wall 5a of the connecting pin insertion hole 5 to be transformed into a trapezoidal shape in cross section in FIG. According to the first embodiment, when the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5, the large-diameter portion 11 (convex portion 14) of the bellows-shaped annular elastic body 9 is inserted into the connecting pin insertion hole. 5 will come into contact with the hole wall 5a (FIG. 4).
reference). Since the large-diameter portion 11 (projection portion 14) is formed with slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, the annular elasticity is provided as in the conventional example. Compared with the case where the body (35) has a cylindrical shape and the outer surface thereof is a surface parallel to the hole wall of the connecting pin insertion hole (parallel surface), the hole wall 5a of the connecting pin insertion hole 5 is The amount (volume) of the annular elastic body 9 that is pressed and deformed can be reduced, and thus the annular elastic body 9 can be prevented from being deformed in a constricted shape.
【００２６】また、環状弾性体９が変形する量を減らす
ことで、従来例で示した、連結ピン挿通孔の孔壁との環
状弾性体における接触部に作用していた菅体長手方向両
方に引き伸ばすような力が低減することになり、この接
触部に亀裂が生じにくくなる。したがって、環状弾性体
９がくびれ状に変形することを抑えて、環状弾性体９の
菅体８からの剥離を防止することができ、そして前記接
触部１９に亀裂が生じにくくすることもでき、ここに履
帯用ブッシュ７の寿命を延長することができるのであ
る。Further, by reducing the amount of deformation of the annular elastic body 9, both in the longitudinal direction of the tubular body, which has been acting on the contact portion of the annular elastic body with the hole wall of the connecting pin insertion hole, which is shown in the conventional example. The stretching force is reduced, and cracks are less likely to occur at this contact portion. Therefore, it is possible to prevent the annular elastic body 9 from being deformed into a constricted shape, prevent the annular elastic body 9 from being separated from the tube body 8, and prevent the contact portion 19 from cracking. The life of the track bush 7 can be extended here.
【００２７】また、凹部１５は、径内方に凹んだ曲面で
形成されており、凹部１５をこのような曲面で形成する
ことにより、走行時に、この凹部１５に亀裂が生じにく
くなっている。また、履帯１には従来例よりも寿命が延
長された履帯用ブッシュ７が設けられるので、履帯用ブ
ッシュ７の交換回数が減って、ここに履帯の保守性を向
上させることができるのである。図５，図６は本発明に
おける履帯用ブッシュの第２実施形態を示している。Further, the concave portion 15 is formed by a curved surface that is concave inward in the diameter, and by forming the concave portion 15 with such a curved surface, it is difficult for the concave portion 15 to crack during traveling. Further, since the crawler belt bushing 7 having a longer life than that of the conventional example is provided in the crawler belt 1, the number of times of exchanging the crawler belt bush 7 can be reduced, and the maintainability of the crawler belt can be improved. 5 and 6 show a second embodiment of the crawler belt bush according to the present invention.
【００２８】この第２実施形態では、環状弾性体９は、
菅体８の長手方向に間隔をおいて複数（図例では４個）
形成されている。そして環状弾性体９は、菅体８長手方
向両側で径内方に傾斜して菅体８長手方向に広がる斜面
１７を有し、これら両斜面１７の交差位置が環状弾性体
９の径方向最頂部２１とされている。第２実施形態にお
ける環状弾性体９と第１実施形態における環状弾性体９
とを比較すると、第２実施形態における環状弾性体９が
菅体８長手方向に間隔をおいて複数設けられているのに
対し、第１実施形態では、第２実施形態における環状弾
性体９が菅体長手方向に連続状に設けられているという
こともできる。In the second embodiment, the annular elastic body 9 is
A plurality of tube bodies 8 are arranged at intervals in the longitudinal direction (four in the illustrated example).
Has been formed. The annular elastic body 9 has slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8. It is designated as the top 21. The annular elastic body 9 in the second embodiment and the annular elastic body 9 in the first embodiment.
Comparing with the above, the plurality of annular elastic bodies 9 in the second embodiment are provided at intervals in the longitudinal direction of the tubular body 8, whereas in the first embodiment, the annular elastic body 9 in the second embodiment is provided. It can be said that they are continuously provided in the longitudinal direction of the tubular body.
【００２９】図６は、履帯用ブッシュ７が連結ピン挿通
孔５に圧入されたときの状態を示している。図６に示す
ように、履帯用ブッシュ７が連結ピン挿通孔５に圧入さ
れると環状弾性体９は、連結ピン挿通孔５の孔壁５ａに
押さえつけられて変形することとなる。このとき、環状
弾性体９における、連結ピン挿通孔の孔壁５ａとの接触
部１９の菅体８長手方向の接触幅１９ａよりも、環状弾
性体９における、菅体８との固着部２０の菅体８長手方
向の固着幅２０ａが大きくなっている。FIG. 6 shows a state in which the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5. As shown in FIG. 6, when the crawler belt bush 7 is press-fitted into the connecting pin insertion hole 5, the annular elastic body 9 is deformed by being pressed by the hole wall 5 a of the connecting pin insertion hole 5. At this time, the fixed portion 20 of the annular elastic body 9 fixed to the tubular body 8 is smaller than the contact width 19a of the contact portion 19 of the annular elastic body 9 with the hole wall 5a of the connecting pin insertion hole in the longitudinal direction of the tubular body 8. The fixing width 20a in the longitudinal direction of the tube body 8 is large.
【００３０】このように固着部２０の菅体８長手方向の
固着幅が接触部１９の接触幅１９ａよりも大きくなって
いれば、従来例のように環状弾性体（３５）がくびれ状
に変形することがなくなり、これによって環状弾性体９
の剥離を防止して履帯用ブッシュ７の寿命を延長するこ
とができる。以上説明した第２実施形態によれば、履帯
用ブッシュ７に、環状弾性体９に前記斜面１７を形成す
ることにより、環状弾性体９が履板２の連結ピン挿通孔
５に圧入されたときに、連結ピン挿通孔５の孔壁５ａに
押されて変形する環状弾性体９の量（体積）を従来例よ
りも減らすことができ、環状弾性体９がくびれ状に変形
することを防止することができる。Thus, if the fixing width of the fixing portion 20 in the longitudinal direction of the tube body 8 is larger than the contact width 19a of the contact portion 19, the annular elastic body (35) is deformed into a constricted shape as in the conventional example. The annular elastic body 9
It is possible to prevent the peeling off and to extend the life of the track bush 7. According to the second embodiment described above, when the annular elastic body 9 is press-fitted into the connecting pin insertion hole 5 of the crawler plate 2 by forming the inclined surface 17 on the annular elastic body 9 in the crawler belt bush 7. In addition, the amount (volume) of the annular elastic body 9 that is pressed and deformed by the hole wall 5a of the connecting pin insertion hole 5 can be reduced as compared with the conventional example, and the annular elastic body 9 is prevented from being deformed into a constricted shape. be able to.
【００３１】また、環状弾性体９が変形する量を減らす
ことで、従来例で示した、連結ピン挿通孔５の孔壁５ａ
との接触部１９に作用していた、菅体８長手方向両方に
引き伸ばすような力が低減することになり、この接触部
１９に亀裂が生じにくくなる。このように環状弾性体９
が変形する体積を減らすことで、環状弾性体９がくびれ
状に変形することを抑えて、環状弾性体９において菅体
８に固着された固着部の剥離を防止することができ、そ
して前記接触部１９に亀裂が生じにくくすることもで
き、ここに履帯用ブッシュ７の寿命を延長することがで
きるのである。Further, by reducing the amount of deformation of the annular elastic body 9, the hole wall 5a of the connecting pin insertion hole 5 shown in the conventional example.
The force acting on the contact portion 19 with and for stretching in the longitudinal direction of the tubular body 8 is reduced, and the contact portion 19 is less likely to crack. In this way, the annular elastic body 9
By reducing the volume of deformation of the ring-shaped elastic body 9, it is possible to prevent the ring-shaped elastic body 9 from being deformed in a constricted shape, and to prevent peeling of the fixed portion of the ring-shaped elastic body 9 fixed to the tube body 8. It is possible to make the portion 19 less likely to crack and to extend the life of the track bush 7 there.
【００３２】図７は、本発明における履帯用ブッシュの
第３実施形態を示している。この第３実施形態において
は、履帯１の環状弾性体９の外面は、大径部１１（凸部
１４）と小径部１２（凹部１５）が菅体８長手方向に交
互に形成された蛇腹状とされており、大径部１１（凸部
１４）の菅体長手方向両側には径内方に傾斜して菅体長
手方向に広がる斜面１７が形成されている。この斜面１
７のうち、一方の斜面１７ａは菅体の径外方に凸状の曲
面とされており、他方の斜面１７ｂは、断面視直線状の
面とされている。FIG. 7 shows a third embodiment of the crawler belt bush according to the present invention. In the third embodiment, the outer surface of the annular elastic body 9 of the crawler belt 1 has a bellows shape in which large diameter portions 11 (projections 14) and small diameter portions 12 (recesses 15) are alternately formed in the longitudinal direction of the tube body 8. The slopes 17 are formed on both sides of the large-diameter portion 11 (convex portion 14) in the longitudinal direction of the tube body and are inclined radially inward and spread in the longitudinal direction of the tube body. This slope 1
7, one of the slopes 17a is a curved surface that is convex outward in the radial direction of the tube body, and the other slope 17b is a surface that is linear in cross section.
【００３３】この第３実施形態によれば、履帯用ブッシ
ュ７は、第１実施形態と同様に、大径部１１（凸部１
４）には、菅体８長手方向両側で径内方に傾斜して菅体
８長手方向に広がる斜面１７が形成されているので、従
来例のように環状弾性体（３５）が円柱状とされ、その
外側面が、連結ピン挿通孔の孔壁と平行な面（平行面）
とされている場合と比較して、連結ピン挿通孔５の孔壁
５ａに押されて変形する環状弾性体９の量（体積）を減
らすことができ、これにより環状弾性体９がくびれ状に
変形することを防止することができる。According to the third embodiment, the crawler belt bush 7 has the large diameter portion 11 (the convex portion 1) as in the first embodiment.
In 4), since the inclined surfaces 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, the annular elastic body (35) has a columnar shape as in the conventional example. The outer surface is parallel to the hole wall of the connecting pin insertion hole (parallel surface).
The amount (volume) of the annular elastic body 9 which is pressed and deformed by the hole wall 5a of the connecting pin insertion hole 5 can be reduced as compared with the case where the annular elastic body 9 is constricted. It can be prevented from being deformed.
【００３４】また、環状弾性体９が変形する量を減らす
ことで、従来例のように連結ピン挿通孔の孔壁との環状
弾性体における接触部に作用していた菅体長手方向両方
に引き伸ばすような力が低減することになり、この接触
部に亀裂が生じにくくなる。以上により、環状弾性体９
がくびれ状に変形することを抑えて、環状弾性体９の菅
体８からの剥離を防止することができ、そして前記接触
部１９に亀裂が生じにくくすることもでき、ここに履帯
用ブッシュ７の寿命を延長することができるのである。Further, by reducing the amount of deformation of the annular elastic body 9, the annular elastic body is stretched in both the longitudinal direction of the tube which has been acting on the contact portion of the annular elastic body with the hole wall of the connecting pin insertion hole as in the conventional example. Such a force is reduced, and the contact portion is less likely to crack. From the above, the annular elastic body 9
It is possible to prevent the annular elastic body 9 from being separated from the tube body 8 by suppressing the deformation of the annular elastic body 9 and to prevent the contact portion 19 from cracking easily. The life of the can be extended.
【００３５】図８、図９は、本発明における履帯用ブッ
シュの第４実施形態を示している。この第４実施形態に
おいても、上述の第１、第３実施形態と同様に、環状弾
性体９の外面は、大径部１１（凸部１４）と小径部１２
（凹部１５）が菅体長手方向に交互に形成された蛇腹状
とされ、大径部１１（凸部１４）には、菅体長手方向両
側に径内方に傾斜して菅体長手方向に広がる斜面１７が
形成されている。この第４実施形態では、斜面１７はい
ずれも断面視直線状の面に形成されている。8 and 9 show a fourth embodiment of the crawler belt bush according to the present invention. Also in the fourth embodiment, the outer surface of the annular elastic body 9 has a large diameter portion 11 (projection portion 14) and a small diameter portion 12 as in the first and third embodiments.
The (concave portion 15) has a bellows shape alternately formed in the longitudinal direction of the tubular body, and the large-diameter portion 11 (convex portion 14) is inclined radially inward on both sides in the longitudinal direction of the tubular body in the longitudinal direction of the tubular body. A sloping slope 17 is formed. In the fourth embodiment, each of the slopes 17 is formed into a linear surface in cross section.
【００３６】図９に示すように履帯用ブッシュ７には、
正面から見ると肉厚の厚い厚肉部２４とこの厚肉部２４
よりも肉厚の薄い薄肉部２５が形成されている。この第
４実施形態によれば、第１、第３実施形態と同様に、大
径部１１（凸部１４）には、菅体８長手方向両側で径内
方に傾斜して菅体８長手方向に広がる斜面１７が形成さ
れているので、従来例と比較して、連結ピン挿通孔５の
孔壁５ａに押されて変形する環状弾性体９の量（体積）
を減らすことができ、これにより環状弾性体９がくびれ
状に変形することを防止することができる。As shown in FIG. 9, the crawler belt bush 7 includes:
When viewed from the front, the thick wall portion 24 and the thick wall portion 24 are thick.
A thin portion 25 having a smaller thickness than that is formed. According to the fourth embodiment, similarly to the first and third embodiments, the large-diameter portion 11 (the convex portion 14) is inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and is elongated in the longitudinal direction of the tubular body 8. Since the inclined surface 17 that spreads in the direction is formed, the amount (volume) of the annular elastic body 9 that is pressed and deformed by the hole wall 5a of the connecting pin insertion hole 5 as compared with the conventional example.
Therefore, the annular elastic body 9 can be prevented from being deformed into a constricted shape.
【００３７】また、環状弾性体９が変形する量を減らす
ことで、従来例で示した、連結ピン挿通孔の孔壁との環
状弾性体における接触部に作用していた菅体長手方向両
方に引き伸ばすような力が低減することになり、この接
触部に亀裂が生じにくくなる。したがって、環状弾性体
９がくびれ状に変形することを抑えて、環状弾性体９の
菅体８からの剥離を防止することができ、そして前記接
触部１９に亀裂が生じにくくすることもでき、ここに履
帯用ブッシュ７の寿命を延長することができるのであ
る。Further, by reducing the amount of deformation of the annular elastic body 9, both in the longitudinal direction of the tubular body, which has been acting on the contact portion of the annular elastic body with the hole wall of the connecting pin insertion hole shown in the conventional example. The stretching force is reduced, and cracks are less likely to occur at this contact portion. Therefore, it is possible to prevent the annular elastic body 9 from being deformed into a constricted shape, prevent the annular elastic body 9 from being separated from the tube body 8, and prevent the contact portion 19 from cracking. The life of the track bush 7 can be extended here.
【００３８】図１０，図１１は本発明における履帯用ブ
ッシュの第５実施形態を示している。この第５実施形態
では、履帯用ブッシュ７は、連結ピン４が挿通される菅
体８と、この菅体８の外周に環状に配設され、かつ菅体
８外面から***した凸状弾性体９ａから構成されてい
る。前記凸状弾性体９ａは、半球状に形成され、菅体８
長手方向両側で径内方に傾斜して菅体８長手方向に広が
る長手方向斜面１７を有し、長手方向斜面１７同士の交
差位置が凸状弾性体９ａの径方向最頂部２１とされてい
る。10 and 11 show a crawler belt bush according to a fifth embodiment of the present invention. In the fifth embodiment, the crawler belt bushing 7 has a tubular body 8 through which the connecting pin 4 is inserted, and a convex elastic body that is annularly arranged on the outer periphery of the tubular body 8 and is raised from the outer surface of the tubular body 8. 9a. The convex elastic body 9a is formed in a hemispherical shape, and has a tubular shape.
There is a longitudinal slant surface 17 that is inclined radially inward on both sides in the longitudinal direction and spreads in the longitudinal direction of the tubular body 8, and the intersecting position of the longitudinal slant surfaces 17 is the radial top 21 of the convex elastic body 9a. .
【００３９】また、この凸状弾性体９ａは、菅体８周方
向両側で傾斜して周方向に広がる斜面２２（周方向斜面
２２）を有している。この第５実施形態によれば、履帯
用ブッシュ７が連結ピン挿通孔５に圧入されたときに
は、菅体８の外周に環状に配設された凸状弾性体９ａが
連結ピン挿通孔５の孔壁５ａに接触することとなる。こ
の凸状弾性体９ａには、菅体８長手方向両側で径内方に
傾斜して菅体８長手方向に広がる斜面１７が形成されて
いるので、従来例のように環状弾性体（３５）が円柱状
とされ、その外側面が、連結ピン挿通孔５の孔壁５ａと
平行な面（平行面）とされていた場合と比較して、連結
ピン挿通孔５の孔壁５ａに押されて変形する凸状弾性体
９ａの量（体積）を減らすことができ、凸状弾性体９ａ
がくびれ状に変形することを防止することができる。The convex elastic body 9a has slopes 22 (circumferential slopes 22) inclined on both sides in the circumferential direction of the tubular body 8 and spreading in the circumferential direction. According to the fifth embodiment, when the crawler belt bush 7 is press-fitted into the connection pin insertion hole 5, the convex elastic body 9a annularly arranged on the outer periphery of the tube body 8 is formed in the connection pin insertion hole 5. It will come into contact with the wall 5a. Since the convex elastic body 9a is formed with slopes 17 that are inclined radially inward on both sides in the longitudinal direction of the tubular body 8 and spread in the longitudinal direction of the tubular body 8, the annular elastic body (35) is formed as in the conventional example. Has a cylindrical shape, and its outer surface is pushed by the hole wall 5a of the connecting pin insertion hole 5 as compared with the case where the outer surface is parallel to the hole wall 5a of the connecting pin insertion hole 5 (parallel surface). The amount (volume) of the convex elastic body 9a that deforms due to
It is possible to prevent the waist from deforming like a neck.
【００４０】さらに、この凸状弾性体９ａには、菅体８
周方向両側で傾斜して周方向に広がる斜面（以下、周方
向斜面という）が形成されており、走行時に、この凸状
弾性体９ａに菅体８周方向の力が作用したときに、この
凸状弾性体９ａが菅体周方向でくびれ状に変形すること
を防止でき、凸状弾性体９ａにおいて菅体８に固着され
た固着部（接着部２０）の剥離を防止することができ
る。これにより、凸状弾性体９ａがくびれ状に変形する
ことを抑えて、凸状弾性体９ａの菅体８からの剥離を防
止することができ、ここに履帯用ブッシュ７の寿命を延
長することができるのである。Further, the convex elastic body 9a has a tubular body 8
Slopes (hereinafter referred to as circumferential slopes) that are inclined on both sides in the circumferential direction and spread in the circumferential direction are formed, and when a force in the circumferential direction of the tube body 8 acts on the convex elastic body 9a during traveling, It is possible to prevent the convex elastic body 9a from being deformed into a constriction shape in the circumferential direction of the tubular body, and to prevent peeling of the fixed portion (adhesive portion 20) fixed to the tubular body 8 in the convex elastic body 9a. As a result, the convex elastic body 9a can be prevented from being deformed into a constricted shape, and the convex elastic body 9a can be prevented from peeling from the tube body 8, and the life of the track bushing 7 can be extended. Can be done.
【００４１】本発明における履帯１は、図１に示した実
施形態に限らず、上述した第２実施形態から第５実施形
態のいずれの履帯用ブッシュ７をも備えることができ
る。なお、本発明は上述した実施形態に限らず以下のよ
うに種々の変形が可能である。履板２の形状は、図１に
示したものに限られず、本発明は種々の形態の履板に実
施可能である。第５実施形態では、凸状弾性体９ａは、
環状に４個ずつ配設されていたが、この個数は２個、３
個、または、５個以上の複数個形成されていてもよい。The crawler belt 1 according to the present invention is not limited to the embodiment shown in FIG. 1 and can be equipped with any of the above-mentioned crawler belt bushes 7 of the second to fifth embodiments. The present invention is not limited to the above-described embodiment, and various modifications can be made as follows. The shape of the shoe plate 2 is not limited to that shown in FIG. 1, and the present invention can be implemented in various forms of the shoe plate. In the fifth embodiment, the convex elastic body 9a is
Four were arranged in a ring, but this number is 2, 3
A single piece or a plurality of five or more pieces may be formed.
【００４２】また、この凸状弾性体９ａは半球状のもの
に限られず、例えば円錐状（さい頭円錐状を含む）、多
角錐状のものを用いてもよい。第１から第５実施形態に
おいては、前記斜面１７が交差する交差位置が環状弾性
体９の径方向の最頂部２１とされていたが、斜面１７が
交差せずに環状弾性体９または凸状弾性体９ａの径方向
の頂部において、連結ピン挿通孔５の孔壁５ａと接触す
る接触面が形成されていてもよい。第１実施形態におい
ては、斜面１７は径外方に凸状とされた曲面とされてい
たが、この斜面は径内方に凹んだ曲面とされていてもよ
い。The convex elastic body 9a is not limited to the hemispherical shape, and may be, for example, a conical shape (including a truncated cone shape) or a polygonal pyramid shape. In the first to fifth embodiments, the intersection position where the slope 17 intersects is the radial topmost portion 21 of the annular elastic body 9, but the slope 17 does not intersect and the annular elastic body 9 or the convex shape is formed. A contact surface that comes into contact with the hole wall 5a of the connecting pin insertion hole 5 may be formed at the radial top of the elastic body 9a. In the first embodiment, the slope 17 is a curved surface that is convex radially outward, but this slope may be a curved surface that is concave radially inward.
【００４３】[0043]
【発明の効果】本発明によれば環状弾性体が菅体から剥
離することを防止して履帯用ブッシュの寿命を延長でき
る。According to the present invention, it is possible to prevent the annular elastic body from peeling off from the tubular body and to extend the life of the track bush.
【図１】本発明における履帯用ブッシュの第１実施形態
および本発明における履帯の実施形態の一例を示す斜視
図である。FIG. 1 is a perspective view showing an example of a first embodiment of a crawler belt bush according to the present invention and an embodiment of a crawler belt according to the present invention.
【図２】本発明における履帯用ブッシュの第１実施形態
を示す側面図である。FIG. 2 is a side view showing a crawler belt bush according to a first embodiment of the present invention.
【図３】本発明における履帯用ブッシュの第１実施形態
を示す正面図である。FIG. 3 is a front view showing a first embodiment of the crawler belt bush according to the present invention.
【図４】本発明における履帯用ブッシュが連結ピン挿通
孔に圧入されたときの状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which the crawler belt bush according to the present invention is press-fitted into a connecting pin insertion hole.
【図５】本発明における履帯用ブッシュの第２実施形態
を示す側面図である。FIG. 5 is a side view showing a second embodiment of the crawler belt bush according to the present invention.
【図６】本発明における履帯用ブッシュが連結ピン挿通
孔に圧入されたときの状態を示す断面図である。FIG. 6 is a cross-sectional view showing a state when the crawler belt bush according to the present invention is press-fitted into the connecting pin insertion hole.
【図７】本発明における履帯用ブッシュの第３実施形態
を示す側面図である。FIG. 7 is a side view showing a third embodiment of a crawler belt bush according to the present invention.
【図８】本発明における履帯用ブッシュの第４実施形態
を示す側面図である。FIG. 8 is a side view showing a crawler belt bush according to a fourth embodiment of the present invention.
【図９】本発明における履帯用ブッシュの第４実施形態
を示す正面図である。FIG. 9 is a front view showing a crawler belt bush according to a fourth embodiment of the present invention.
【図１０】本発明における履帯用ブッシュの第５実施形
態を示す側面図である。FIG. 10 is a side view showing a crawler belt bush according to a fifth embodiment of the present invention.
【図１１】本発明における履帯用ブッシュの第５実施形
態を示す正面図である。FIG. 11 is a front view showing a fifth embodiment of the crawler belt bush according to the present invention.
【図１２】従来の履帯用ブッシュおよび履帯を示す斜視
図である。FIG. 12 is a perspective view showing a conventional track bush and a track.
【図１３】従来の履帯用ブッシュが連結ピン挿通孔に圧
入されたときの状態を示す断面図である。FIG. 13 is a cross-sectional view showing a state in which a conventional crawler belt bush is press-fitted into a connecting pin insertion hole.
１ 履帯 ２ 履板 ４ 連結ピン ５ 連結ピン挿通孔 ５ａ 孔壁 ７ 履帯用ブッシュ ８ 菅体 ９ 環状弾性体 ９ａ 凸状弾性体 １１ 大径部 １２ 小径部 １４ 凸部 １５ 凹部 １７ 斜面 １９ 接触部 １９ａ 接触幅 ２０ 固着部 ２０ａ 固着幅 ２１ 最頂部 ２２ 周方向にひろがる斜面 1 track 2 footwear 4 connecting pins 5 Connection pin insertion hole 5a hole wall 7 Crawler bush 8 Sugatai 9 annular elastic body 9a Convex elastic body 11 Large diameter part 12 Small diameter part 14 convex 15 recess 17 slope 19 Contact part 19a contact width 20 Fixed part 20a fixed width 21 Top 22 Slope that extends in the circumferential direction
Claims (9)
結ピン（４）が挿通される菅体（８）と、菅体（８）外
面に固着され、かつ、菅体（８）径方向に厚みを有する
環状弾性体（９）から構成され、履板（２）に設けられ
た連結ピン挿通孔（５）に圧入される履帯用ブッシュ
（７）において、 前記環状弾性体（９）は、菅体（８）長手方向両側で径
内方に傾斜して菅体（８）長手方向に広がる斜面（１
７）を有していることを特徴とする履帯用ブッシュ。1. A tube body (8) into which a connecting pin (4) for connecting opposite track plates (2) is inserted, and a tube body (8) fixed to the outer surface of the tube body (8). A crawler belt bush (7) which is composed of an annular elastic body (9) having a thickness in the radial direction and is press-fitted into a connecting pin insertion hole (5) provided in the crawler plate (2). ) Is a slope (1) which is inclined radially inward on both sides in the longitudinal direction of the tubular body (8) and spreads in the longitudinal direction of the tubular body (8).
7) A bush for a crawler track characterized by having:
結ピン（４）が挿通される菅体（８）と、菅体（８）外
面に固着され、かつ、菅体（８）径方向に厚みを有する
環状弾性体（９）から構成され、履板（２）に設けられ
た連結ピン挿通孔（５）に圧入される履帯用ブッシュ
（７）において、 前記環状弾性体（９）は、菅体（８）長手方向両側で径
内方に傾斜して菅体（８）長手方向に広がる斜面（１
７）を有しており、 前記環状弾性体（９）は菅体（８）の長手方向に間隔を
おいて複数設けられ、または、連続状に設けられている
ことを特徴とする履帯用ブッシュ。2. A tube body (8) through which a connecting pin (4) for connecting opposite track plates (2) is inserted, and a tube body (8) fixed to the outer surface of the tube body (8). A crawler belt bush (7) which is composed of an annular elastic body (9) having a thickness in the radial direction and is press-fitted into a connecting pin insertion hole (5) provided in the crawler plate (2). ) Is a slope (1) which is inclined radially inward on both sides in the longitudinal direction of the tubular body (8) and spreads in the longitudinal direction of the tubular body (8).
7), wherein the annular elastic body (9) is provided in plural at intervals in the longitudinal direction of the tubular body (8) or is continuously provided. .
結ピン（４）が挿通される菅体（８）と、菅体（８）外
面に固着され、かつ、菅体（８）径方向に厚みを有する
環状弾性体（９）から構成され、履板（２）に設けられ
た連結ピン挿通孔（５）に圧入される履帯用ブッシュ
（７）において、 前記環状弾性体（９）の外面は、凸部（１４）と凹部
（１５）が菅体（８）長手方向に交互に形成された蛇腹
状とされており、 凸部（１４）は、菅体（８）長手方向両側で径内方に傾
斜して菅体（８）長手方向に広がる斜面（１７）を有し
ていることを特徴とする履帯用ブッシュ。3. A tube body (8) into which a connecting pin (4) for connecting opposite track plates (2) is inserted, and a tube body (8) fixed to the outer surface of the tube body (8). A crawler belt bush (7) which is composed of an annular elastic body (9) having a thickness in the radial direction and is press-fitted into a connecting pin insertion hole (5) provided in the crawler plate (2). The outer surface of) has a bellows shape in which convex portions (14) and concave portions (15) are alternately formed in the longitudinal direction of the tubular body (8), and the convex portion (14) is in the longitudinal direction of the tubular body (8). A crawler belt bush characterized in that it has slopes (17) which are inclined radially inward on both sides and spread in the longitudinal direction of the tubular body (8).
結ピン（４）が挿通される菅体（８）と、菅体（８）外
面に固着され、かつ、菅体（８）径方向に厚みを有する
環状弾性体（９）から構成され、履板（２）に設けられ
た連結ピン挿通孔（５）に圧入される履帯用ブッシュ
（７）において、 前記環状弾性体（９）は、大径部（１１）と小径部（１
２）が菅体（８）長手方向に交互に形成された蛇腹状と
されており、大径部（１１）は、菅体（８）長手方向両
側で径内方に傾斜して菅体（８）長手方向に広がる斜面
（１７）を有していることを特徴とする履帯用ブッシ
ュ。4. A tube body (8), through which a connecting pin (4) for connecting opposite track plates (2) is inserted, and a tube body (8) fixed to the outer surface of the tube body (8). A crawler belt bush (7) which is composed of an annular elastic body (9) having a thickness in the radial direction and is press-fitted into a connecting pin insertion hole (5) provided in the crawler plate (2). ) Indicates a large diameter portion (11) and a small diameter portion (1
2) has a bellows shape alternately formed in the longitudinal direction of the tubular body (8), and the large-diameter portion (11) is inclined toward the inside in the radial direction on both sides of the tubular body (8) in the longitudinal direction. 8) A track bush having a slope (17) extending in the longitudinal direction.
（８）の径外方に凸状の曲面とされており、前記斜面
（１７）と前記凸部（１４）の頂部（２１）は連続した
曲面で形成されていることを特徴とする請求項３に記載
の履帯用ブッシュ。5. Each of the slopes (17) is a curved surface that is convex outward in the radial direction of the tube body (8), and the slopes (17) and the tops (21) of the projections (14). The track bush according to claim 3, wherein is formed by a continuous curved surface.
ときの、環状弾性体（９）における、連結ピン挿通孔
（５）の孔壁（５ａ）との接触部（１９）の菅体（８）
長手方向の接触幅（１９ａ）よりも、環状弾性体（９）
における、菅体（８）との固着部（２０）の菅体（８）
長手方向の固着幅（２０ａ）が大きいことを特徴とする
請求項１から５のいずれかに記載の履帯用ブッシュ。6. A tube of a contact portion (19) with a wall (5a) of the connecting pin insertion hole (5) in the annular elastic body (9) when press-fitted into the connecting pin insertion hole (5). Body (8)
The annular elastic body (9) is larger than the contact width (19a) in the longitudinal direction.
(8) of the fixed part (20) with the tubular body (8) in
The track bush according to any one of claims 1 to 5, wherein a fixing width (20a) in the longitudinal direction is large.
（２）に設けられた連結ピン挿通孔（５）に圧入される
履帯用ブッシュ（７）において、 前記履帯用ブッシュ（７）は、連結ピン（４）が挿通さ
れる菅体（８）と、この菅体（８）の外周に環状に配設
されて菅体（８）に固着され、かつ、菅体（８）外面か
ら***した凸状弾性体（９ａ）から構成され、 前記凸状弾性体（９ａ）は、菅体（８）長手方向両側で
径内方に傾斜して菅体（８）長手方向に広がる斜面（１
７）を有していることを特徴とする履帯用ブッシュ。7. A crawler belt bush (7) press-fitted into a coupling pin insertion hole (5) provided in a crawler plate (2) coupled by a coupling pin (4), wherein the crawler belt bush (7) is A tube body (8) through which the connecting pin (4) is inserted; and a tube body (8) which is annularly arranged on the outer periphery of the tube body (8) and fixed to the tube body (8), and from the outer surface of the tube body (8). The convex elastic body (9a) is formed of a raised convex elastic body (9a), and the convex elastic body (9a) slopes radially inward on both sides in the longitudinal direction of the tubular body (8) and spreads in the longitudinal direction of the tubular body (8) ( 1
7) A bush for a crawler track characterized by having:
（２）に設けられた連結ピン挿通孔（５）に圧入される
履帯用ブッシュ（７）において、 前記履帯用ブッシュ（７）は、連結ピン（４）が挿通さ
れる菅体（８）と、この菅体（８）の外周に環状に配設
されて菅体（８）に固着され、かつ、菅体（８）外面か
ら***した凸状弾性体（９ａ）から構成され、 前記凸状弾性体（９ａ）は、菅体（８）長手方向両側で
径内方に傾斜して菅体（８）長手方向に広がる斜面（１
７）と、菅体（８）周方向両側で傾斜して周方向に広が
る斜面（２２）とを有していることを特徴とする履帯用
ブッシュ。8. A crawler belt bush (7) press-fitted into a coupling pin insertion hole (5) provided in a crawler plate (2) coupled by a coupling pin (4), wherein the crawler belt bush (7) is A tube body (8) through which the connecting pin (4) is inserted; and a tube body (8) which is annularly arranged on the outer periphery of the tube body (8) and fixed to the tube body (8), and from the outer surface of the tube body (8). The convex elastic body (9a) is formed of a raised convex elastic body (9a), and the convex elastic body (9a) slopes radially inward on both sides in the longitudinal direction of the tubular body (8) and spreads in the longitudinal direction of the tubular body (8) ( 1
7) and a crawler belt bushing characterized by having a sloping surface (22) that inclines on both sides in the circumferential direction of the tube body (8) and expands in the circumferential direction.
（２）を備え、この履板（２）に設けられた連結ピン挿
通孔（５）に請求項１から８のいずれかに記載の履帯用
ブッシュ（７）が圧入されたことを特徴とする履帯。9. The shoe according to claim 1, further comprising a shoe plate (2) connected by a connecting pin (4), the connecting pin insertion hole (5) provided in the shoe plate (2). Crawler track characterized in that the track bush (7) is press-fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001390351A JP2003182655A (en) | 2001-12-21 | 2001-12-21 | Crawler belt bush and crawler belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001390351A JP2003182655A (en) | 2001-12-21 | 2001-12-21 | Crawler belt bush and crawler belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003182655A true JP2003182655A (en) | 2003-07-03 |
Family
ID=27598310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001390351A Pending JP2003182655A (en) | 2001-12-21 | 2001-12-21 | Crawler belt bush and crawler belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003182655A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011522729A (en) * | 2008-05-29 | 2011-08-04 | ロリック・インベスト・エス．エーアール．エル． | PRESSURE SNOW TRACK AND PRESSURE SNOW DEVICE CHARACTERIZED BY THIS TRACK |
| KR20210000454A (en) * | 2019-06-25 | 2021-01-05 | 엘에스엠트론 주식회사 | Track Apparatus for Vehicle |
-
2001
- 2001-12-21 JP JP2001390351A patent/JP2003182655A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011522729A (en) * | 2008-05-29 | 2011-08-04 | ロリック・インベスト・エス．エーアール．エル． | PRESSURE SNOW TRACK AND PRESSURE SNOW DEVICE CHARACTERIZED BY THIS TRACK |
| US8757736B2 (en) | 2008-05-29 | 2014-06-24 | Snowgrolic S. AR. L. | Snow groomer track and snow groomer featuring such a track |
| KR20210000454A (en) * | 2019-06-25 | 2021-01-05 | 엘에스엠트론 주식회사 | Track Apparatus for Vehicle |
| KR102644610B1 (en) | 2019-06-25 | 2024-03-08 | 엘에스엠트론 주식회사 | Track Apparatus for Vehicle |
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