JP2010202070A - Core metal for rubber crawler - Google Patents

Core metal for rubber crawler Download PDF

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JP2010202070A
JP2010202070A JP2009050779A JP2009050779A JP2010202070A JP 2010202070 A JP2010202070 A JP 2010202070A JP 2009050779 A JP2009050779 A JP 2009050779A JP 2009050779 A JP2009050779 A JP 2009050779A JP 2010202070 A JP2010202070 A JP 2010202070A
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rubber crawler
wheel
circumferential direction
top surface
guide
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JP5431750B2 (en
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Akira Miyamoto
亮 宮本
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a core metal for a rubber crawler satisfying all the following features: (1) a wheel tends to return when the wheel is likely to derail, (2)lightweight, (3)reduced vertical movement of wheel and machine body, and (4) a core metal is easy to draw out of a casting mold. <P>SOLUTION: Top faces 16a-1, 16a-2 have sloped faces formed so that heights thereof gradually decrease from protrusion side ends 16b-1, 16b-2 toward peripheral-direction opposite side ends 16c-1, 16c-2. The cross widths of the top faces 16a-1, 16a-2 are formed so as to gradually decrease from the protrusion side ends 16b-1, 16b-2 toward the peripheral-direction opposite side ends 16c-1, 16c-2. Inner wall portions 16d-1, 16d-2 of guide protrusions 16-1, 16-2 include sloped portions 24-1, 24-2 formed so that the thickness of the guide protrusion in the width direction decreases toward the sloped faces 16a-1, 16-2. In the lower areas of the top faces 16a-1, 16a-2, a restriction portion 28 whose horizontal cross section is smaller than the top face is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ゴムクローラ用芯金、特に内部に転輪通過のためのガイド突起が設けられたゴムクローラ用芯金に関する。   The present invention relates to a core member for a rubber crawler, and more particularly to a core member for a rubber crawler in which a guide projection for passing a wheel is provided.

内部に芯金を有するゴムクローラは、ゴムクローラの周方向に複数の芯金が並べて配置されている。それらの芯金は通常全て同一形状である。芯金には、幅方向の略中央部に一対のガイド突起が形成されており、これらのガイド突起の間をスプロケット及びアイドラーが通過し、また一対のガイド突起の上部を転輪が通過するように構成されている。なお、スプロケット及びアイドラーは、ゴムクローラに駆動力を与えるものであり、転輪はゴムクローラを円滑に前進及び後退させるためのものである。   A rubber crawler having a cored bar inside has a plurality of cored bars arranged in the circumferential direction of the rubber crawler. The cores are usually all the same shape. The metal core has a pair of guide protrusions formed at a substantially central portion in the width direction. The sprocket and idler pass between the guide protrusions, and the wheel passes above the pair of guide protrusions. It is configured. Note that the sprocket and idler give a driving force to the rubber crawler, and the wheels are for smoothly moving the rubber crawler forward and backward.

更に、芯金には、上記のガイド突起が幅方向にずれることのないように互いに係合し合う突起が設けられ、幅方向の大きなずれ、いわゆる脱臼の発生を防止している。これは、ゴムクローラの周方向に並べて埋設された芯金のガイド突起が、幅方向に不揃いな状態になると、スプロケット、アイドラー、又は転輪が通過する際に脱輪し易くなり、非常に危険な状態となるので、これを防止するためのものである。   Further, the cored bar is provided with protrusions that engage with each other so that the guide protrusions do not shift in the width direction, thereby preventing the occurrence of a large shift in the width direction, so-called dislocation. This is because, if the guide protrusions of the cored bar arranged side by side in the circumferential direction of the rubber crawler become uneven in the width direction, the sprocket, idler, or wheel will be easily removed when passing, which is extremely dangerous. This is to prevent this situation.

図4(a)は、従来の、芯金に転輪通過のためのガイド突起と脱輪防止のための突起が設けられているゴムクローラ用芯金の概略平面図である。同図(b)は概略正面図である。   FIG. 4A is a schematic plan view of a conventional rubber crawler core bar in which a core bar is provided with a guide protrusion for passing through a roller wheel and a protrusion for preventing wheel removal. FIG. 2B is a schematic front view.

芯金52は前述のように幅方向の略中央部に一対のガイド突起56−1、56−2を有している。それらのガイド突起56−1、56−2の突起方向は接地面に垂直、すなわちゴムクローラ本体の内周面側であり、それぞれの突起から当該芯金のゴムクローラの幅方向に向かう翼部(羽根部)54が延在している。一対のガイド突起56−1、56−2の間は、スプロケット(図示していない)及びアイドラー(図示していない)が通過する駆動領域50を形成し、一対のガイド突起56−1、56−2の上部の頂面56a−1、56a−2は転輪通過面を構成している。   As described above, the cored bar 52 has a pair of guide protrusions 56-1 and 56-2 at a substantially central portion in the width direction. The projection directions of the guide protrusions 56-1 and 56-2 are perpendicular to the ground contact surface, that is, the inner peripheral surface side of the rubber crawler body, and the wings (from the respective protrusions toward the width direction of the rubber crawler of the core metal) The blade portion 54 extends. A drive region 50 through which a sprocket (not shown) and an idler (not shown) pass is formed between the pair of guide protrusions 56-1 and 56-2, and the pair of guide protrusions 56-1 and 56-. The top surfaces 56a-1 and 56a-2 at the top of 2 constitute a wheel passing surface.

幅方向の大きなずれを防止のための突起42、43は、一対のガイド突起56−1、56−2の接地面側に形成されている。これらの突起42、43は、突起方向が周方向(接地面と平行)であり、突起42と突起43は、それぞれ相反する方向に突出して形成されている。それらの突起の先端形状は互いに係合し合う形状になっている。すなわち、突起42は山形突起として形成され、突起43はその山形突起を受け入れる凹部を中央に有する二股突起として形成されている。したがって、突起42、43は隣り合う芯金52の突起42、43と係合することが可能になっている。なお、芯金52がゴムクローラ本体に埋設された状態では、これら突起42、43はゴム部材で覆われており、突起42と突起43の間にはゴム部材が介入されている。   The protrusions 42 and 43 for preventing a large shift in the width direction are formed on the grounding surface side of the pair of guide protrusions 56-1 and 56-2. The protrusions 42 and 43 are formed so that the protrusion direction is a circumferential direction (parallel to the ground plane), and the protrusions 42 and the protrusions 43 protrude in opposite directions. The tip shapes of these protrusions are shapes that engage with each other. That is, the protrusion 42 is formed as a chevron protrusion, and the protrusion 43 is formed as a bifurcated protrusion having a recess at the center for receiving the chevron protrusion. Therefore, the protrusions 42 and 43 can be engaged with the protrusions 42 and 43 of the adjacent cored bar 52. In the state where the cored bar 52 is embedded in the rubber crawler body, the protrusions 42 and 43 are covered with a rubber member, and the rubber member is interposed between the protrusion 42 and the protrusion 43.

上記一対のガイド突起56−1、56−2は、周方向にずれた位置に偏位して形成されているので、その上部に形成された頂面56a−1、56b−2は周方向に互いにずれた位置に存することとなる。その偏位は、芯金52の中央部及び翼部54の縁部から周方向に突出した態様でなされている。したがって、頂面56a−1、56b−2の周方向の長さは、芯金52の翼部54の周方向の幅と略同じ又は小さく形成されているが、頂面56a−1、56b−2は周方向に位置をずらして存在しているため、頂面56a−1は周方向に突出している突出側端部56b−1と、これと周方向反対側の周方向反対側端部56c−1とを有することとなる。同様に、頂面56a−2も、周方向に突出している突出側端部56b−2と、これと周方向反対側の周方向反対側端部56c−2を有する。突出側端部56b−1、56b−2と周方向反対側端部56c−1、56c−2の幅方向の長さは略同一である。また、頂面56a−1、56a−2は、転輪が通過し易いように平坦に形成され、頂面56a−1、56a−2の芯金52の底部56からの高さは全面が同一となっている。   Since the pair of guide protrusions 56-1 and 56-2 are formed to be deviated at positions displaced in the circumferential direction, the top surfaces 56a-1 and 56b-2 formed on the upper portions thereof are circumferentially formed. It will exist in the position which mutually shifted | deviated. The displacement is made in a manner protruding in the circumferential direction from the central portion of the core metal 52 and the edge portion of the wing portion 54. Accordingly, the circumferential lengths of the top surfaces 56a-1 and 56b-2 are substantially the same as or smaller than the circumferential width of the wing portion 54 of the cored bar 52, but the top surfaces 56a-1 and 56b- 2 is shifted in the circumferential direction, the top surface 56a-1 has a projecting side end 56b-1 projecting in the circumferential direction, and a circumferentially opposite side end 56c opposite to the circumferential direction. −1. Similarly, the top surface 56a-2 also has a protruding side end portion 56b-2 protruding in the circumferential direction and a circumferentially opposite side end portion 56c-2 opposite to the circumferential direction. The lengths in the width direction of the protruding end portions 56b-1 and 56b-2 and the circumferentially opposite end portions 56c-1 and 56c-2 are substantially the same. The top surfaces 56a-1 and 56a-2 are formed flat so that the wheels can easily pass through, and the heights of the top surfaces 56a-1 and 56a-2 from the bottom portion 56 of the cored bar 52 are the same. It has become.

図5(a)は、図4(a)のC−C概略断面図であり、図5(b)は、芯金を鋳造法で製作するときの鋳型の割り位置を示した説明図である。ガイド突起56−1の頂面56a−1は、図示したように平坦であり、芯金52の底部56から略垂直に立ち上がって形成されている。また、芯金52は鋳物であり、目的製品の形状に対応した型穴をもつ鋳型に溶融した材料(鉄)を注入し、そのまま凝固させるという方法(鋳造法)で製作される。凝固した製品を取り出す際に、鋳型をどの位置で割るのかを示したのが図5(b)であり、従来は鋳型を、符号100が付されたラインで芯金52の上下方向に割っていた。   Fig.5 (a) is CC schematic sectional drawing of Fig.4 (a), FIG.5 (b) is explanatory drawing which showed the split position of the casting_mold | template when manufacturing a metal core with a casting method. . The top surface 56 a-1 of the guide protrusion 56-1 is flat as shown in the figure, and is formed to rise substantially vertically from the bottom 56 of the core metal 52. The cored bar 52 is a casting, and is manufactured by a method (casting method) in which a molten material (iron) is poured into a mold having a mold hole corresponding to the shape of the target product and solidified as it is. FIG. 5 (b) shows the position at which the mold is divided when the solidified product is taken out. Conventionally, the mold is divided in the vertical direction of the cored bar 52 by a line denoted by reference numeral 100. It was.

図5(b)には、転輪62が一対のガイド突起56−1、56−2の頂面56a−1、56a−2を通過する様子も共に示している。転輪62には、頂面56a−1、56a−2を通過するための車輪部62a、62bと、転輪62が一対のガイド突起56−1、56−2間から脱輪しないように中央部に脱輪防止部62cが突出して設けられている。脱輪防止部62cは、ガイド突起56−1、56−2の内壁部56d−1、56d−2間を通過する。   FIG. 5B also shows a state in which the roller wheel 62 passes through the top surfaces 56a-1 and 56a-2 of the pair of guide protrusions 56-1 and 56-2. The wheel 62 includes a wheel portion 62a and 62b for passing through the top surfaces 56a-1 and 56a-2, and a center so that the wheel 62 does not escape from between the pair of guide protrusions 56-1 and 56-2. The part is provided with a derailment prevention part 62c protruding. The derailment prevention portion 62c passes between the inner wall portions 56d-1 and 56d-2 of the guide protrusions 56-1 and 56-2.

近年、上記の頂面の芯金の底部からの高さが周方向に同一の場合には、転輪が頂面の周方向の端部を通過する際に、芯金が落ち込み、隣の芯金の頂面に乗り移る際に段差が生じて、転輪の上下動が多くなり、振動・騒音が大きくなることが解った。芯金が落ち込むのは、芯金の接地面側に形成されるラグ部がゴム部材で製作されており、転輪が通過する際に機体の重量が掛かるためである。そこで、例えば特許文献1に開示されているように、頂面を斜面にして周方向の端部を高くする方法が提案されている。この方法によれば、転輪がその上を通過する際に、芯金が落ち込んだとしても隣の芯金の頂面の端部と同じ高さになるので、転輪及び機体の上下動、振動、騒音等が少なくなるという効果を発揮する。   In recent years, when the height of the top surface from the bottom of the core metal is the same in the circumferential direction, the core metal falls down when the roller passes the circumferential end of the top surface, and the adjacent core It was found that there was a step when transferring to the top of the gold, and the vertical movement of the wheels increased, resulting in increased vibration and noise. The reason why the mandrel falls is that the lug formed on the ground contact surface side of the mandrel is made of a rubber member, and the weight of the machine body is increased when the rolling wheels pass. Therefore, as disclosed in Patent Document 1, for example, a method has been proposed in which the top surface is inclined and the circumferential end is raised. According to this method, when the wheel passes over it, even if the cored bar falls, it becomes the same height as the end of the top surface of the adjacent cored bar. Demonstrates the effect of reducing vibration and noise.

特開平4−81376号公報JP-A-4-81376

特許文献1に開示されているように、ガイド突起の頂面を斜面にすることでゴムクローラの上下動は少なくなるものの、更に以下に示す問題点があった。まず、転輪62の脱輪防止部62cの一対のガイド突起56−1、56−2間の横方向の遊びが少ないために、芯金52に横方向の力が加わり脱輪しそうになった場合に、脱輪防止部62cがガイド突起の内壁部56d−1又は内壁部56d−2を直ぐに駆け上り、転輪62が脱輪し易いことである。更に、脱輪防止部62cがガイド突起の内壁部56d−1又は内壁部56d−2を駆け上がった場合に、ガイド突起の内壁部56d−1、56d−2が略垂直に立ち上がっているために、転輪62が戻り難いことも脱輪を助長している。   As disclosed in Patent Document 1, although the vertical movement of the rubber crawler is reduced by making the top surface of the guide protrusion an inclined surface, there are the following problems. First, since there is little lateral play between the pair of guide protrusions 56-1 and 56-2 of the anti-derailing portion 62c of the roller wheel 62, the lateral force is applied to the core metal 52 and the wheel is likely to be removed. In this case, the derailment prevention portion 62c immediately runs up the inner wall portion 56d-1 or the inner wall portion 56d-2 of the guide protrusion, and the wheel 62 is easy to derail. Further, when the anti-roll-out preventing portion 62c runs up the inner wall portion 56d-1 or the inner wall portion 56d-2 of the guide protrusion, the inner wall portions 56d-1 and 56d-2 of the guide protrusion rise substantially vertically. The fact that the wheel 62 is difficult to return also facilitates the wheel removal.

また、ガイド突起56−1、56−2を芯金52の底部56から略垂直に立ち上がって突出させた構成を取っていることは、芯金52の重量の増加をもたらしており、使用する材料の量も多くなり、コスト高にもなっている。   In addition, the fact that the guide protrusions 56-1 and 56-2 are configured to rise substantially vertically from the bottom portion 56 of the cored bar 52 and project is caused to increase the weight of the cored bar 52, and the material to be used The amount of money is also increasing and the cost is high.

本発明は、上記課題に鑑みてなされたものであり、その目的は、(1)転輪が脱輪しそうな場合に転輪が戻り易く、脱輪し難い、(2)軽量である、(3)転輪及び機体の上下動が少ない、(4)芯金が鋳型から抜き易い、という特徴を全て満足するゴムクローラ用芯金を提供することにある。   The present invention has been made in view of the above-mentioned problems, and its purpose is (1) when the wheel is likely to be removed, the wheel is easy to return, and is difficult to remove, and (2) is lightweight. 3) An object of the present invention is to provide a rubber crawler core bar that satisfies all the features that the rolling wheel and the vertical movement of the machine body are small, and (4) the core bar is easy to remove from the mold.

上記目的を達成するため、請求項1に記載のゴムクローラ用芯金は、
無端帯状のゴムクローラ本体に該ゴムクローラ本体の周方向に一定の間隔をおいて埋設され、該埋設状態で前記ゴムクローラ本体の幅方向に延在する一対の翼部と、該翼部間に存する中央部と、該中央部の両脇に設けられ前記埋設状態における前記ゴムクローラ本体の内周面側に突出し頂面が転輪の通過面をなす一対のガイド突起と、これら各ガイド突起の基部に設けられ隣設される他の芯金とそれぞれ噛み合う一対の突起と、を有し、前記一対のガイド突起の頂面が、互いに前記周方向の反対側に突出して設けられたゴムクローラ用芯金において、前記各ガイド突起の頂面は、その高さが前記突出側端部から前記周方向の反対側に向かって漸次低くなるように形成された傾斜面とされ、かつ、幅方向の幅長が前記突出側端部から前記周方向の反対側に向かって漸次狭くなるように形成され、前記各ガイド突起の前記中央部側の内壁部には、該ガイド突起の幅方向の厚さが漸次前記頂面に向かって薄くなるように傾斜部が形成され、前記各ガイド突起の頂面の下部領域には、水平断面が前記頂面よりも小さくした絞り部が形成されていることを特徴とする。
In order to achieve the above object, the rubber crawler core metal according to claim 1,
A pair of wings embedded in the endless belt-like rubber crawler body at a certain interval in the circumferential direction of the rubber crawler body and extending in the width direction of the rubber crawler body in the embedded state, and between the wings And a pair of guide protrusions which are provided on both sides of the central part and project toward the inner peripheral surface side of the rubber crawler body in the embedded state and whose top surface forms a passing surface of the wheel, A rubber crawler provided with a pair of protrusions that are respectively provided on the base and mesh with each of the other adjacent core bars, and the top surfaces of the pair of guide protrusions are provided so as to protrude opposite to each other in the circumferential direction. In the mandrel, the top surface of each guide protrusion is an inclined surface formed such that its height gradually decreases from the protruding side end toward the opposite side of the circumferential direction, and in the width direction. Width is from the protruding side end to the circumferential direction It is formed so as to become gradually narrower toward the opposite side, and the inner wall portion on the central side of each guide protrusion is inclined so that the thickness in the width direction of the guide protrusion gradually becomes thinner toward the top surface. In the lower region of the top surface of each guide projection, a narrowed portion having a horizontal cross section smaller than that of the top surface is formed.

斯かる構成を採用することにより、以下に示す効果を発揮する。
頂面は、その高さが突出側端部から周方向反対側に向かって漸次低くなるように、言い換えれば突出側端部の高さを周方向反対側端部の高さより高くしているので、転輪通過時に頂面の突出側端部が落ち込んでも、隣り合う芯金の周方向反対側端部と高さが同じになるので、転輪の上下動が少なくなる。それと共に、振動・騒音も少なくなる。
By adopting such a configuration, the following effects are exhibited.
Since the height of the top surface gradually decreases from the protruding side end toward the circumferentially opposite side, in other words, the height of the protruding side end is made higher than the height of the circumferentially opposite side end. Even if the projecting side end of the top surface falls when passing through the rolling wheel, the height of the adjacent cored bar is the same as the circumferentially opposite end, so that the vertical movement of the rolling wheel is reduced. At the same time, vibration and noise are reduced.

各ガイド突起の中央部側の内壁部には、ガイド突起の横方向の厚さが頂面に向かって薄くなっている傾斜部が形成され、かつ頂面は横幅(幅長)が突出側端部から周方向反対側端部に向かって漸次狭くなっているので、転輪の脱輪防止部の一対のガイド突起間での遊びが大きくなっている。したがって、転輪が脱輪しそうになっても脱輪防止部が内壁部を直ぐに駆け上らず、脱輪が生じ難くなっている。また、ガイド突起の内壁部には、上述の傾斜部が形成されているので、転輪の脱輪防止部がガイド突起の内壁部を駆け上った場合でも、この傾斜部があることにより転輪が元の位置に戻り易くなっており、脱輪の防止が図られることとなる。   An inclined portion is formed on the inner wall portion on the center side of each guide projection, with the lateral thickness of the guide projection becoming thinner toward the top surface, and the top surface has a lateral width (width length) on the protruding side end. Since the width gradually decreases from the portion toward the end opposite to the circumferential direction, the play between the pair of guide protrusions of the derailment prevention portion of the wheel is increased. Therefore, even if the wheel is likely to be derailed, the derailment prevention part does not run up the inner wall immediately, and derailment is less likely to occur. In addition, since the above-described inclined portion is formed on the inner wall portion of the guide protrusion, even if the derailment prevention portion of the wheel runs up the inner wall portion of the guide protrusion, the inclined portion is provided by the inclined portion. The wheel is easy to return to the original position, thereby preventing the wheel from being removed.

頂面の幅方向の幅長が、突出側端部から周方向反対側端部に向かって漸次狭くなっているので、芯金の鋳型からの引き出し(取り出し)が容易となる。すなわち、芯金の割り位置を、従来のように芯金の上下方向にした場合には、ガイド突起の頂面の下部領域には水平断面が頂面よりも小さい絞り部が形成されているので、突出側端部及び周方向反対側端部が引っ掛かり鋳型から取り出せない。そこで、平面視で周方向の前後で割り、かつガイド突起の場所では周方向の前後にずらしている。ここで、上述のように頂面の幅方向の幅長が突出側端部から周方向反対側端部に向かって漸次狭くなっているので、鋳型からの芯金の引き出しが容易となる。   Since the width of the top surface in the width direction is gradually narrowed from the projecting side end to the circumferentially opposite end, it is easy to pull out (take out) the cored bar from the mold. That is, when the split position of the core metal is set to the vertical direction of the core metal as in the prior art, a narrowed portion having a horizontal section smaller than the top surface is formed in the lower region of the top surface of the guide protrusion. The projecting side end and the circumferentially opposite end are caught and cannot be removed from the mold. Therefore, it is divided front and rear in the circumferential direction in plan view, and is shifted back and forth in the circumferential direction at the location of the guide projection. Here, as described above, the width of the top surface in the width direction is gradually narrowed from the protruding side end toward the circumferentially opposite end, so that the cored bar can be easily pulled out from the mold.

頂面の下部領域には水平断面が頂面よりも小さい絞り部を形成したので、芯金の重量を大幅に軽くすることが可能であり、同時に使用する材料の量が減りコスト低下に役立つ。   In the lower region of the top surface, a constricted portion having a horizontal cross section smaller than that of the top surface is formed, so that the weight of the core bar can be significantly reduced, and at the same time, the amount of material used is reduced, which helps to reduce the cost.

請求項2に記載のゴムクローラ用芯金は、請求項1に記載のゴムクローラ用芯金において、
前記各ガイド突起の前記中央部側の内壁部は、前記周方向の中央領域が端部領域よりも膨出した水平断面形状を有することを特徴とする。
The rubber crawler metal core according to claim 2 is the rubber crawler metal core according to claim 1,
The inner wall portion on the central portion side of each guide protrusion has a horizontal cross-sectional shape in which a central region in the circumferential direction bulges than an end region.

したがって、転輪の脱輪防止部の一対のガイド突起間での遊びが更に大きくなっており、転輪が脱輪しそうになっても脱輪防止部が内壁部を直ぐに駆け上ることがなく、脱輪が生じ難くなっている。また、各ガイド突起の中央部側の内壁部は、周方向の中央領域が端部領域よりも膨出した水平断面形状を有するので、転輪の脱輪防止部がガイド突起の内壁部を駆け上った場合に、上記のような形状を有するので、転輪が元の位置により戻り易くなっており、脱輪の防止が図られることとなる。   Therefore, the play between the pair of guide protrusions of the anti-rolling prevention portion of the wheel is further increased, and even if the rolling wheel is about to take off, the anti-wheel prevention portion does not run up the inner wall portion immediately, Derailment is less likely to occur. In addition, the inner wall portion on the center side of each guide projection has a horizontal cross-sectional shape in which the central region in the circumferential direction bulges more than the end region, so that the derailment prevention portion of the wheel runs along the inner wall portion of the guide projection. When it goes up, it has the shape as described above, so that the wheel can be easily returned to its original position, thereby preventing the wheel from being removed.

本発明のゴムクローラ用芯金によれば、一対のガイド突起のそれぞれの頂面を傾斜させ、頂面の突出側端部と周方向反対側端部の横幅に差を設け、一対のガイド突起の中央部側の内壁部に傾斜部を形成し、頂面の下部領域に絞り部を形成したので、転輪が脱輪しそうな時に戻り易く、脱輪し難く、かつ転輪及び機体の上下動が少ない。更に、芯金は鋳型から抜き易く、軽量である。したがって、ゴムクローラの信頼性とコストパフォーマンスが向上する。   According to the rubber crawler core bar of the present invention, the top surfaces of the pair of guide projections are inclined, and a difference is provided in the lateral width between the projecting side end portion and the circumferentially opposite end portion of the top surface. An inclined part is formed in the inner wall part on the center side of the center part, and a throttle part is formed in the lower area of the top surface, so that it is easy to return when the wheel is likely to be removed, and it is difficult to remove the wheel. There is little movement. Furthermore, the cored bar is easy to remove from the mold and is lightweight. Therefore, the reliability and cost performance of the rubber crawler are improved.

本発明のゴムクローラ用芯金の実施の形態に係り、同図(a)は芯金の概略平面図、同図(b)は芯金の概略正面図である。FIG. 4A is a schematic plan view of the cored bar, and FIG. 2B is a schematic front view of the cored bar according to the embodiment of the core for the rubber crawler of the present invention. 本発明のゴムクローラ用芯金の実施の形態に係り、同図(a)は芯金の概略側面図、同図(b)は図1(a)のA−A概略断面図である。FIG. 4A is a schematic side view of the cored bar, and FIG. 1B is a schematic cross-sectional view taken along line AA of FIG. 1A according to the embodiment of the core for the rubber crawler of the present invention. 本発明のゴムクローラ用芯金の実施の形態に係り、同図(a)は図1(a)のB−B概略断面図、同図(b)は図1(a)の鋳型の割り位置を示す説明図である。1A is a schematic cross-sectional view taken along line BB in FIG. 1A, and FIG. 1B is a split position of a mold in FIG. 1A. It is explanatory drawing which shows. 従来のゴムクローラ用芯金に係り、同図(a)は芯金の概略平面図、同図(b)は芯金の概略正面図である。FIG. 1A is a schematic plan view of a core metal, and FIG. 1B is a schematic front view of the core metal. 従来のゴムクローラ芯金に係り、同図(a)は図4(a)のC−C概略断面図、同図(b)は鋳型の割り位置を示し、同時に転輪が通過する様子を示す説明図である。FIG. 4A is a schematic cross-sectional view taken along the line C-C in FIG. 4A, and FIG. 4B shows a split position of the mold, and shows how the rolling wheels pass simultaneously. It is explanatory drawing.

本発明の実施の形態を、以下図面を参照しながら詳述する。図1(a)は、本発明のゴムクローラ用芯金の概略平面図である。同図(b)は、概略正面図である。以下、従来のゴムクローラ用芯金と異なる点を主に詳述する。   Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1A is a schematic plan view of a rubber crawler core bar of the present invention. FIG. 2B is a schematic front view. Hereinafter, differences from the conventional rubber crawler cores will be mainly described in detail.

芯金12には、従来と同様に略中央部に一対のガイド突起16−1、16−2が設けられている。ガイド突起16−1、16−2の上部には頂面16a−1、16a−2が形成されている。ガイド突起16−1、16−2は、芯金12の中央部の周方向に互いにずれた位置に形成されており、それ故に頂面16a−1は、周方向に中央部及び翼部54の縁部から突出した突出側端部16b−1と、それと周方向反対側の周方向反対側端部16c−1とを有している。同様に、頂面16a−2は、周方向に突出した突出側端部16b−2と、周方向反対側端部16c−2とを有している。図1(a)から解るように、突出側端部16b−1と突出側端部16b−2とは、それぞれ周方向反対側に突出している。頂面16a−1、16a−2の突出側端部16b−1、16b−2と周方向反対側端部16c−1、16c−2との間隔(長さ)は、中央部及び翼部54の周方向の幅と略同一である。   The cored bar 12 is provided with a pair of guide protrusions 16-1 and 16-2 at a substantially central portion as in the prior art. Top surfaces 16a-1 and 16a-2 are formed on the upper portions of the guide protrusions 16-1 and 16-2. The guide protrusions 16-1 and 16-2 are formed at positions shifted from each other in the circumferential direction of the central portion of the cored bar 12, and therefore the top surface 16 a-1 is formed in the central portion and the wing portion 54 in the circumferential direction. It has a protruding side end 16b-1 protruding from the edge and a circumferentially opposite side end 16c-1 opposite to the circumferential direction. Similarly, the top surface 16a-2 has a protruding side end portion 16b-2 protruding in the circumferential direction and a circumferential direction opposite side end portion 16c-2. As can be seen from FIG. 1A, the projecting side end portion 16b-1 and the projecting side end portion 16b-2 each project to the opposite side in the circumferential direction. The space | interval (length) of protrusion side edge part 16b-1, 16b-2 of top surface 16a-1, 16a-2 and circumferential direction opposite side edge part 16c-1, 16c-2 is a center part and wing | blade part 54 Is substantially the same as the width in the circumferential direction.

頂面16a−1、16a−2は、その芯金12の底部56からの高さが、突出側端部16b−1、16b−2から周方向反対側端部16c−1、16c−2に向かって漸次低くなるように形成されている。したがって、頂面16a−1、16a−2は傾斜面となっている。また、頂面16a−1、16a−2の横幅は、突出側端部16b−1、16b−2から周方向反対側端部16c−1、16c−2に向かって漸次狭くなるように形成されている。図1(a)では、一点鎖線にてそのことを強調している。そして、ガイド突起16−1、16−2の中央部側の内壁部16d−1、16d−2には、頂面16a−1、16a−2に向かってガイド突起16−1、16−2の横方向の厚さが漸次薄くなるように斜めに削り落とした傾斜部24−1、24−2が形成されている。   The top surfaces 16a-1 and 16a-2 have heights from the bottom portion 56 of the core metal 12 from the protruding side end portions 16b-1 and 16b-2 to the circumferentially opposite side end portions 16c-1 and 16c-2. It is formed so as to gradually become lower. Therefore, the top surfaces 16a-1 and 16a-2 are inclined surfaces. Further, the lateral widths of the top surfaces 16a-1 and 16a-2 are formed so as to gradually narrow from the protruding side end portions 16b-1 and 16b-2 toward the circumferentially opposite side end portions 16c-1 and 16c-2. ing. In FIG. 1A, this is emphasized by a one-dot chain line. And the guide protrusions 16-1 and 16-2 are formed on the inner wall portions 16d-1 and 16d-2 on the center side of the guide protrusions 16-1 and 16-2 toward the top surfaces 16a-1 and 16a-2. Inclined portions 24-1 and 24-2 are formed so as to be obliquely shaved so that the thickness in the lateral direction is gradually reduced.

また、各ガイド突起16−1、16−2の中央部側(転輪の脱輪防止部が通過する側)の内壁部16d−1、16d−2の水平断面形状は、周方向の中央領域が端部領域よりも膨出した形状となっている。   Further, the horizontal cross-sectional shapes of the inner wall portions 16d-1 and 16d-2 on the center side of the guide protrusions 16-1 and 16-2 (the side through which the wheel removal prevention portion of the wheel passes) is the center region in the circumferential direction. Has a shape bulging from the end region.

頂面16a−1、16a−2を傾斜面に、すなわち突出側端部16b−1、16b−2の高さを周方向反対側端部16c−1、16c−2の高さより高くしたことで、転輪が突出側端部16b−1を通過する際に、芯金12が落ち込んでも、隣り合う芯金の周方向反対側端部16c−1と高さが同一になり、転輪及び機体の上下動が抑えられる。同時に、振動や騒音等が少なくなる。   The top surfaces 16a-1 and 16a-2 are inclined surfaces, that is, the heights of the projecting side end portions 16b-1 and 16b-2 are made higher than the heights of the circumferentially opposite side end portions 16c-1 and 16c-2. When the roller passes through the protruding end 16b-1, even if the core 12 falls, the height is the same as the circumferentially opposite end 16c-1 of the adjacent core. Can be prevented from moving up and down. At the same time, vibration and noise are reduced.

図2(a)は、本発明のゴムクローラに係る芯金の側面図であり、図2(b)は図1(a)のA−A概略断面図である。これらの図から解るように、頂面16a−1、16a−2は突出側端部16b−1、16b−2から周方向反対側端部16c−1、6c−2に向かってそれぞれ傾斜して角度2θを為している。   Fig.2 (a) is a side view of the metal core which concerns on the rubber crawler of this invention, FIG.2 (b) is AA schematic sectional drawing of Fig.1 (a). As can be seen from these figures, the top surfaces 16a-1 and 16a-2 are inclined from the protruding side end portions 16b-1 and 16b-2 toward the circumferentially opposite side end portions 16c-1 and 6c-2, respectively. The angle is 2θ.

このように、一対のガイド突起16−1、16−2の脱輪防止部が通過する側の内壁部16d−1、16d−2に傾斜部24−1、24−2を形成し、かつ頂面16a−1、16a−2の周方向反対側端部16b−1、16b−2の横幅を突出側端部16c−1、16c−2の横幅よりも漸次小さくすることで、転輪の脱輪防止部の一対のガイド突起16−1、16−2間での遊びが大きくなり、脱輪が生じ難くなっている。すなわち、芯金12に横方向の力が加わり横に少しずれても、遊びがあるために転輪の転輪防止部がガイド突起16−1、16−2の内壁部16d−1、16d−2を直ぐに駆け上ることがない。   In this way, the inclined portions 24-1 and 24-2 are formed on the inner wall portions 16d-1 and 16d-2 on the side through which the anti-wheel removal portion of the pair of guide protrusions 16-1 and 16-2 passes, The lateral width of the circumferentially opposite end portions 16b-1 and 16b-2 of the surfaces 16a-1 and 16a-2 is gradually made smaller than the lateral width of the projecting side end portions 16c-1 and 16c-2. The play between the pair of guide protrusions 16-1 and 16-2 of the wheel preventing portion is increased, and the wheel is hardly removed. That is, even if a lateral force is applied to the metal core 12 and it is slightly deviated laterally, there is play, so that the anti-roller portion of the roller wheel becomes the inner wall portions 16d-1, 16d- of the guide protrusions 16-1, 16-2. You will not run up 2 immediately.

また、ガイド突起16−1、16−2の内壁部16d−1、16d−2には、傾斜部24−1、24−2が形成されているので、転輪の脱輪防止部が一対のガイド突起16−1、16−2の内壁部16d−1、16d−2を駆け上がったとしても、この傾斜部24−1、24−2があることにより転輪が元の位置に戻り易くなっており、脱輪が効果的に防止されることとなる。   In addition, since the inclined portions 24-1 and 24-2 are formed on the inner wall portions 16d-1 and 16d-2 of the guide protrusions 16-1 and 16-2, a pair of wheel-falling prevention portions for the wheel is provided as a pair. Even if the inner wall portions 16d-1 and 16d-2 of the guide protrusions 16-1 and 16-2 run up, the inclined wheels 24-1 and 24-2 make it easier for the wheels to return to their original positions. As a result, derailment is effectively prevented.

図3(a)は、図1(a)のB−B概略断面図であり、図3(b)は、鋳型の割りの位置を示す説明図である。一対のガイド突起16−1、16−2の頂面16a−1、16a−2の下部領域には、水平断面が頂面16a−1、16a−2よりも小さな絞り部28が形成されている。この絞り部28を形成するために、鋳型の割りの位置を図3(b)の符号102を付した実線で示されるように、芯金12の周方向に、かつガイド突起16−1、16−2の位置では周方向の前後に設定した。従来のように、芯金12の上下方向に設定したのでは、ガイド突起16−1、16−2の頂面16a−1、16a−2の突出側端部16b−1、16b−2及び周方向反対側端部16c−1、16c−2が鋳型に引っ掛かり取り出すことができないためである。本実施の形態では、前述のように頂面16a−1、16a−2の突出側端部16b−1、16b−2の横幅を周方向反対側端部16c−1、16c−2の横幅より小さくしているので、芯金12の鋳型からの引き出しが容易となっている。   Fig.3 (a) is BB schematic sectional drawing of Fig.1 (a), FIG.3 (b) is explanatory drawing which shows the position of the split of a casting_mold | template. In a lower region of the top surfaces 16a-1 and 16a-2 of the pair of guide protrusions 16-1 and 16-2, a narrowed portion 28 having a horizontal section smaller than that of the top surfaces 16a-1 and 16a-2 is formed. . In order to form the narrowed portion 28, the position of the mold split is indicated in the circumferential direction of the core metal 12 and the guide protrusions 16-1, 16 as indicated by the solid line with the reference numeral 102 in FIG. At the position of -2, it was set before and after in the circumferential direction. As in the prior art, when set in the vertical direction of the cored bar 12, the projecting side ends 16b-1, 16b-2 of the top surfaces 16a-1, 16a-2 of the guide protrusions 16-1, 16-2 and the circumference This is because the direction opposite side end portions 16c-1 and 16c-2 are caught by the mold and cannot be taken out. In the present embodiment, as described above, the lateral widths of the protruding side end portions 16b-1 and 16b-2 of the top surfaces 16a-1 and 16a-2 are made larger than the lateral widths of the circumferentially opposite side end portions 16c-1 and 16c-2. Since it is made small, it is easy to pull out the core 12 from the mold.

したがって、本実施の形態のゴムクローラ用芯金によれば、一対のガイド突起のそれぞれの頂面を傾斜面とし、頂面の突出側端部と周方向反対側端部の横幅に差を設け、一対のガイド突起の中央部側の内壁部にそれぞれ傾斜部を形成し、頂面の下部領域に絞り部を形成したので、転輪は脱輪し難く、転輪及び機体の上下動が少ない。また、使用している芯金は鋳型から抜き易く、軽量である。したがって、ゴムクローラのコストパフォーマンスは良好であり、使い勝手が良い。   Therefore, according to the rubber crawler core bar of the present embodiment, the top surfaces of the pair of guide protrusions are inclined surfaces, and a difference is provided in the lateral width between the projecting side end portion and the circumferentially opposite end portion of the top surface. Since the inclined part is formed in the inner wall part on the center side of the pair of guide protrusions and the throttle part is formed in the lower area of the top surface, the wheel is difficult to be removed and the wheel and the vertical movement of the machine body are small. . Further, the cored bar used is easy to remove from the mold and is lightweight. Therefore, the cost performance of the rubber crawler is good and easy to use.

なお、本発明は、上述の実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々の変更が可能である。例えば、脱輪防止のための突起は、山形突起と二股突起のものを示したが、この他の形状であっても良い。   Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the protrusions for preventing the wheel from being removed are shown as a chevron protrusion and a bifurcated protrusion, but may have other shapes.

12 芯金
16−1、16−2 ガイド突起
16a−1、16a−2 頂面
16b−1、16b−2 突出側端部
16c−1、16c−2 周方向反対側端部
16d−1、16d−2 内壁部
24−1、24−2 傾斜部
28 絞り部
42、43 脱輪防止のための突起
50 駆動領域
54 翼部
56 底部
102 鋳型の割り位置
12 Cores 16-1, 16-2 Guide protrusions 16a-1, 16a-2 Top surfaces 16b-1, 16b-2 Protruding side end portions 16c-1, 16c-2 Circumferentially opposite end portions 16d-1, 16d -2 Inner wall portion 24-1, 24-2 Inclined portion 28 Restricted portion 42, 43 Protrusion 50 for preventing wheel removal Drive region 54 Wing portion 56 Bottom portion 102 Mold split position

Claims (2)

無端帯状のゴムクローラ本体に該ゴムクローラ本体の周方向に一定の間隔をおいて埋設され、該埋設状態で前記ゴムクローラ本体の幅方向に延在する一対の翼部と、該翼部間に存する中央部と、該中央部の両脇に設けられ前記埋設状態における前記ゴムクローラ本体の内周面側に突出し頂面が転輪の通過面をなす一対のガイド突起と、これら各ガイド突起の基部に設けられ隣設される他の芯金とそれぞれ噛み合う一対の突起と、を有し、
前記一対のガイド突起の頂面が、互いに前記周方向の反対側に突出して設けられたゴムクローラ用芯金において、
前記各ガイド突起の頂面は、その高さが前記突出側端部から前記周方向の反対側に向かって漸次低くなるように形成された傾斜面とされ、かつ
幅方向の幅長が前記突出側端部から前記周方向の反対側に向かって漸次狭くなるように形成され、
前記各ガイド突起の前記中央部側の内壁部には、該ガイド突起の幅方向の厚さが漸次前記頂面に向かって薄くなるように傾斜部が形成され、
前記各ガイド突起の頂面の下部領域には、水平断面が前記頂面よりも小さくした絞り部が形成されていることを特徴とするゴムクローラ用芯金。
A pair of wings embedded in the endless belt-like rubber crawler body at a certain interval in the circumferential direction of the rubber crawler body and extending in the width direction of the rubber crawler body in the embedded state, and between the wings And a pair of guide protrusions which are provided on both sides of the central part and project toward the inner peripheral surface side of the rubber crawler body in the embedded state and whose top surface forms a passing surface of the wheel, A pair of protrusions that mesh with each of the other cores provided on the base and adjacent to each other;
In the rubber crawler core bar provided with the top surfaces of the pair of guide protrusions protruding from each other in the circumferential direction,
The top surface of each guide protrusion is an inclined surface formed such that its height gradually decreases from the protruding side end toward the opposite side in the circumferential direction, and the width in the width direction protrudes from the protrusion. Formed to gradually narrow from the side end toward the opposite side of the circumferential direction,
An inclined portion is formed on the inner wall portion on the center portion side of each guide projection so that the thickness in the width direction of the guide projection gradually decreases toward the top surface,
In the lower region of the top surface of each guide projection, a constricted portion having a horizontal cross section smaller than that of the top surface is formed.
前記各ガイド突起の前記中央部側の内壁部は、
前記周方向の中央領域が端部領域よりも膨出した水平断面形状を有することを特徴とする請求項1に記載のゴムクローラ用芯金。
The inner wall portion on the center side of each guide protrusion is
The rubber crawler core bar according to claim 1, wherein the central region in the circumferential direction has a horizontal cross-sectional shape bulging from an end region.
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JP2013189057A (en) * 2012-03-13 2013-09-26 Bridgestone Corp Crawler core, elastic crawler, and mold for crawler core
CN108974164A (en) * 2018-09-14 2018-12-11 浙江元创橡胶履带有限公司 Anticreep rubber belt track core gold and anticreep rubber belt track
CN112441150A (en) * 2019-09-03 2021-03-05 住友橡胶工业株式会社 Elastic crawler and core member

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CN112441150A (en) * 2019-09-03 2021-03-05 住友橡胶工业株式会社 Elastic crawler and core member
CN112441150B (en) * 2019-09-03 2024-04-12 住友橡胶工业株式会社 Elastic crawler belt and core member

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