JPH03235767A - Rubber crawler - Google Patents

Abstract

PURPOSE:To increase a traction force and to reduce the generation of vibration and noise by forming an engaging hole, engaged with a starting wheel, in the central part of a rubber crawler and forming a lug with a central part, located in a specified position between the engaging holes, and branch parts. CONSTITUTION:A rubber crawler is formed such that metallic cores 2 engaged with every tooth of a starting wheel are embedded in parallel in an endless rubber belt 1. In this case, an engaging hole 9 engaged with the starting wheel is formed in the central part in the direction of width of the rubber crawler between the adjoining cores, and this constitution escapes the addendum of the starting wheel. Lugs are disposed on the earthing surface side of the rubber crawler, each comprises a central part 10 between the adjoining engaging holes 9, and branch parts 11 continued to the two central parts 10 located adjacently to each other with the engaging hole 9 therebetween and each parting away from the central part obliquely rearwardly toward both end parts of the rubber crawler belt. This constitution increases a traction force and reduces the generation of vibration and noise.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ゴム履帯に係り、特にブルドーザや油圧掘削
機等の建設機械をはじめとする装軌車両に巻装するゴム
履帯に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rubber track, and particularly to a rubber track that is wrapped around a tracked vehicle such as a construction machine such as a bulldozer or a hydraulic excavator.

［従来の技術］ 従来、ブルドーザ、油圧掘削機等の建設機械をはじめと
する装軌車両においては、遊動輪と起動輪との間に設け
られたトラックフレームに上転軸および下転軸を取着し
、これらの各輪に鉄層帯を巻装して、起動輪に伝達され
た動力により履帯を回転させて車両を走行させるように
なフている。[Prior Art] Conventionally, in tracked vehicles such as construction machines such as bulldozers and hydraulic excavators, an up-rotation shaft and a down-rotation shaft are mounted on a track frame provided between an idler wheel and a starting wheel. A steel layer band is wrapped around each of these wheels, and the power transmitted to the starting wheel rotates the crawler track to make the vehicle run.

近年では足回りの騒音・振動対策として、従来の鉄層帯
に代えて、無端のゴムベルトに一定間隔で金属芯金を埋
設し、この芯金に起動輪の歯を噛み合わせて駆動する一
体形のゴム履帯も用いられている。In recent years, as a countermeasure for noise and vibration in the undercarriage, instead of the conventional iron layer belt, metal cores are embedded at regular intervals in an endless rubber belt, and the teeth of the driving wheel are engaged with these cores to drive the integrated type. Rubber tracks are also used.

ところで鉄層帯は、一般に奇数歯を備えた起動輪に１歯
飛びで噛み合っている。これは起動輪の歯数を奇数にす
ると、履帯の１回転ごとに１ピッチずれた次の歯に噛み
合うことになり、起動輪の歯の摩耗を減らすことができ
るからである。By the way, the iron layer band generally meshes with a driving wheel with an odd number of teeth, with one tooth at a time. This is because if the number of teeth on the starting wheel is set to an odd number, each rotation of the crawler belt will mesh with the next tooth shifted by one pitch, thereby reducing wear on the teeth on the starting wheel.

しかし車両が大型化してくると、従来の鉄層帯の場合、
１歯飛びの噛み合いでは履帯のリンクピッチが大きくな
り、起動輪や遊動輪に履帯を巻き付けたとき、隣接する
リンクに対して大きな屈曲角ができて履帯が多角形とな
り、リンクが起動輪、遊動輪に衝突する際に生じる騒音
や履帯の振動が大きくなるという欠点がある。However, as vehicles become larger, in the case of conventional iron layer belts,
In meshing with one tooth skipping, the link pitch of the track increases, and when the track is wrapped around the starting wheel or idler wheel, a large bending angle is created with respect to the adjacent link, making the crawler polygonal, and the link becomes the starting wheel or idler. The drawback is that the noise and vibration of the track caused by collision with the wheels increases.

この現象はゴム履帯においても生じ、これに加えて起動
輪や遊動輪に履帯を巻き付けたとき履帯の屈曲角が大き
いと、接地面側に設けられたラグの歪が大きくなって亀
裂を生じやすくなり、履帯の耐久性を低下させる。This phenomenon also occurs in rubber tracks, and in addition to this, if the bending angle of the track is large when the track is wrapped around the starting wheel or idler wheel, the distortion of the lugs provided on the contact surface side becomes large and cracks are likely to occur. This reduces the durability of the track.

また鉄層帯の場合、起動輪の１歯で全駆動力の半分以上
を履帯に伝達しており、ゴム履帯の場合も同様であると
考えられていた。このため芯金とゴムどの接着強度は十
分に強大でなければならず、芯金の左右翼部面積を大き
くして接着強度を確保することにしている。その結果、
芯金翼部の前後方向長さが起動輪の歯先間隔より大きく
なって、起動輪の１歯ごとに芯金を噛み合わせることが
できるような間隔で芯金を配置することができず、１歯
飛びの噛み合わせとした並列ピッチの大きなゴム履帯に
なってしまう。このような履帯ては各芯金に設けられた
転輪転勤レール面の間隔が大きくなって、下転軸が転勤
レール面の間に落ち込みながら走行することになるので
、走行振動発生の原因となフている。In addition, in the case of iron-layered tracks, more than half of the total driving force is transmitted to the crawler track by one tooth of the starting wheel, and it was thought that the same would be true in the case of rubber tracks. For this reason, the adhesive strength between the core metal and the rubber must be sufficiently strong, and the area of the left and right wing portions of the core metal is increased to ensure adhesive strength. the result,
The length in the longitudinal direction of the core metal wings is larger than the spacing between the tips of the teeth of the driving wheel, and the core metals cannot be arranged at such intervals that the metal cores can be engaged with each tooth of the driving wheel. This results in a large rubber crawler track with a parallel pitch and one-tooth meshing. In such crawlers, the distance between the rolling wheel transfer rail surfaces provided on each core metal becomes large, and the lower rolling shaft falls between the transfer rail surfaces while running, which may cause running vibration. There is a lot of trouble.

このようなゴム履帯の欠点を解決するため、起動輪の歯
に１歯飛びでなく、金歯を１ピッチごとに噛み合わせる
ように芯金を配設したいわゆるショートピッチのゴム履
帯が製作されている。In order to solve these drawbacks of rubber tracks, so-called short-pitch rubber tracks have been manufactured in which the core metal is arranged so that the teeth of the driving wheel are engaged with the gold teeth every pitch instead of skipping one tooth at a time. .

ショートピッチのゴム履帯における芯金各部の前後方向
長さは、当然のことながら短くなり、芯金の左右翼部投
影面積の減少はゴムベルトと芯金との接着強度の低下を
もたらすことになる。しかし最近になって、起動輪から
ゴム履帯への駆動力伝達は、多少の変動はあるものの噛
み合っている起動輪の各歯に分散して行われていること
が分かった。従って、従来よりも芯金１個当りの接着強
度の低い小形の芯金を用いても、起動輪からの駆動力に
耐えられることになる。Naturally, the longitudinal length of each part of the core metal in a short-pitch rubber crawler track becomes shorter, and a decrease in the projected area of the left and right wing parts of the core metal results in a decrease in the adhesive strength between the rubber belt and the core metal. However, it has recently been discovered that the transmission of driving force from the starting wheel to the rubber crawler track is carried out in a distributed manner across the meshing teeth of the starting wheel, although there are some fluctuations. Therefore, even if a small core metal having a lower adhesive strength per core metal than the conventional one is used, it can withstand the driving force from the starting wheel.

更に、小形化した芯金とゴムとの間の剥離負荷に弱い欠
点を補うため、翼部の上下にスチールコード、繊維コー
ド等を埋設し、駆動力を起動輪から芯金を経て、芯金と
接触しているゴムに伝え、更に芯金の下側に埋設したス
チールコードに至る駆動力伝達経路における芯金とゴム
間のせん断強度を確保するとともに、履帯の剛性向上を
図っている。Furthermore, in order to compensate for the disadvantage of being susceptible to peeling loads between the smaller core metal and rubber, steel cords, fiber cords, etc. are buried above and below the wing section, and the driving force is transferred from the starting wheel through the core metal to the core metal. In addition to ensuring the shear strength between the core metal and the rubber in the driving force transmission path that extends to the rubber that is in contact with the core metal and then to the steel cord buried beneath the core metal, the rigidity of the crawler track is also improved.

［発明が解決しようとする課題］ しかしながら、接地面側に設けるラグを芯金ごとに独立
に設置し、芯金と芯金との間にラグのグルーブを設けた
ゴム履帯の場合は、ラグの摩耗寿命を確保するため、つ
まりラグ面圧を下げるためにラグの接地面積を大きくし
なければならず、上記のように履帯をショートピッチ化
すると、ラグ形状の自由度が小さくなり、かつ土なせん
断するグルーブの面積も大きく取れないため、けん引力
が低下することになる。その他次のような問題点がある
。[Problem to be solved by the invention] However, in the case of a rubber crawler track in which lugs provided on the contact surface side are installed independently for each core metal, and a groove for the lug is provided between the core metals, the lug In order to ensure wear life, that is, to reduce lug surface pressure, the contact area of the lugs must be increased, and if the tracks are short pitched as described above, the degree of freedom in the lug shape will be reduced, and the soil Since the area of the shearing groove cannot be large, the traction force will be reduced. There are other problems as follows.

（１）走行時、芯金と芯金との間に下転輪が落ち込み、
車体が振動する。(1) When running, the lower roller falls between the core metals,
The car body vibrates.

（２）ゴム履帯が起動輪や遊動輪に巻き付いて屈曲した
とき、芯金間に設けられたラグのグルーブの剛性が低い
ため、この部分の屈曲歪が大きく、また履帯の叩き音や
ばたつきが発生しやすい。(2) When the rubber track wraps around the starting wheel or idler wheel and bends, the rigidity of the groove in the lug between the core metals is low, so the bending distortion in this part is large, and the track also produces tapping noise and flapping. Likely to happen.

（３）ラグが芯金ごとに独立に設けられているため、地
盤に対して断続的な食い込みとなり、履帯の起遼力が大
きくなる。(3) Since the lugs are provided independently for each core metal, they bite into the ground intermittently, increasing the traction force of the track.

またショートピッチのゴム履帯において、隣合う２個の
芯金の左右翼部投影面をほぼ覆うように、左右にそれぞ
れラグを設け、かつ左右のラグを互いに１ピッチずらせ
たゴム履帯が知られている。In addition, there is a known short-pitch rubber track in which lugs are provided on the left and right sides so as to almost cover the projected surfaces of the left and right wing parts of two adjacent core metals, and the left and right lugs are shifted by one pitch from each other. There is.

しかしこの履帯の場合、左右に１ピッチずれて芯金間に
ラグの連続しない箇所があるため、芯金間のゴム部の剛
性が左右で著しくアンバランスとなり、このゴム履帯が
起動輪や遊動輪に巻き付いて屈曲したとき、履帯のねじ
れを起こしてラグの不連続部から破断するおそれがある
。また下転輪が芯金間に乗ったとき、ラグの不連続部側
に落ち込むという不具合がある。However, in the case of this type of track, there are places where the lugs are not continuous between the core metals due to a one-pitch shift to the left and right, so the rigidity of the rubber part between the core metals is significantly unbalanced on the left and right, and this rubber track is used for the starting wheels and idlers. When the track wraps around the track and bends, there is a risk that the track will twist and break at the discontinuous part of the lug. Another problem is that when the lower roller rides between the core metals, it falls into the discontinuous portion of the lug.

本発明は上記従来の問題点に着目し、けん引力を増大さ
せ、車両走行時の振動・騒音および屈曲歪が小さく、耐
久性のよいゴム履帯を提供することを目的とする。The present invention has focused on the above-mentioned conventional problems, and an object of the present invention is to provide a rubber crawler track that increases traction force, causes less vibration/noise and bending strain when the vehicle is running, and has good durability.

［課題を解決するための手段］ 上記目的を達成するために本発明に係るゴム履帯は、走
行部分に巻装される無端のゴムベルトに、起動輪の１歯
ごとに噛み合う金属芯金な埋設した装軌車両のゴム履帯
であって、このゴム履帯の幅方向中央部の、隣合う芯金
間に起動輪との噛み合い係合穴を設けるとともに、接地
面側に設けるラグを、隣合う噛み合い係合穴の間に設け
た中央部分と、噛み合い係合穴を挟んで隣合う２個の中
央部分に連続し、ゴム履帯の左右端部に向かってそれぞ
れ斜め後方向に遠ざかる分岐部分とで構成し、このよう
な構成において、 ラグの分岐部分が左右で芯金１ピッチだけずれるように
配設し、左右の分岐部分がそれぞれ隣合う３個の芯金投
影面を連続して斜めに横断するように形成し、 ラグの中央部分と、これに連続する分岐部分とによって
噛み合い係合穴の３方を囲むように形成されるラグ頂面
が、ゴム履帯の全周にわたって千鳥状に連続しているも
のとし、更に、 分岐部分におけるラグ頂面各部の前後方向長さを、履帯
の中央部から左右端部に向かって遠ざかるに従って次第
に短くなるように設定し、これに対応して、隣合うラグ
頂面間に形成されるグルーブ各部の前後方向長さを、履
帯の中央部から左右端部に向かって遠ざかるに従つて次
第に長くなるように設定するとともに、ラグ頂面とラグ
頂面から一定の深さに設けられたグルーブ底面との境界
に形成される斜面を、ラグの前側においては中央部から
左右端部に向かって遠ざかるに従って次第にゆるやかな
傾斜角となるような平面とし、ラグの後側においては中
央部から左右端部にかけて同一傾斜角の平面とする構成
とした。[Means for Solving the Problems] In order to achieve the above object, the rubber crawler track according to the present invention includes a metal core embedded in an endless rubber belt wrapped around a running part, which is a metal core that meshes with each tooth of a driving wheel. A rubber track for a tracked vehicle, in which a hole for meshing with the starting wheel is provided between adjacent core metals at the center of the width direction of the rubber crawler track, and a lug provided on the ground surface side is provided for meshing with the starting wheel. It consists of a central portion provided between the mating holes, and a branching portion that is continuous with the two adjacent central portions across the meshing and engaging holes, and separates diagonally backward toward the left and right ends of the rubber crawler track. In such a configuration, the branching parts of the lug are arranged so that they are shifted by one pitch of the core metal on the left and right, and the left and right branching parts are arranged so that they each diagonally cross the projection plane of the three adjacent core metals. The top surface of the lug, which is formed so as to surround three sides of the engagement hole by the central portion of the lug and the branched portions continuous to the central portion of the lug, continues in a staggered manner over the entire circumference of the rubber crawler track. Furthermore, the length in the longitudinal direction of each part of the top surface of the lug at the branching part is set so that it gradually becomes shorter as it moves away from the center of the crawler track toward the left and right ends, and correspondingly, the length of the top surface of the lug next to each other is The longitudinal length of each groove formed between the surfaces is set so that it gradually increases as it moves away from the center of the crawler track toward the left and right ends, and the length of each groove formed between the surfaces is set so that it becomes gradually longer as it moves away from the center of the crawler track toward the left and right ends. On the front side of the lug, the slope formed at the boundary with the bottom of the groove is a plane that gradually becomes a gentler slope as it moves away from the center toward the left and right ends, and on the rear side of the lug, The structure is such that the plane has the same inclination angle from the center to the left and right ends.

［作用］ 上記構成によれば、ゴム履帯の接地面側に設けるラグの
間に形成されるグルーブを履帯の左右端部に近づくにつ
れて次第に広げたので、土のせん断面積を大きくとるこ
とができる。そしてラグの前側に設けるグルーブの斜面
を履帯の左右端部に近づくにつれて次第にゆるやかな角
度になるように形成したので、前記斜面は履帯の左右端
部に近づくにつれて履帯の下方および側方に向くことに
なり、履帯駆動力による土庄分布を広範囲に広げること
ができ、けん引力を高めるとともに、履帯がスリップし
た場合はグルーブ内の土が履帯外側および下側に押し出
され、上前れが良くなる。[Function] According to the above configuration, the groove formed between the lugs provided on the contact surface side of the rubber crawler track gradually widens as it approaches the left and right ends of the crawler track, so it is possible to increase the shear area of the soil. The slopes of the grooves provided on the front side of the lugs are formed so that they gradually become gentler as they approach the left and right ends of the track, so that the slopes are directed downward and to the sides of the track as they approach the left and right ends of the track. This makes it possible to spread the soil distribution by the crawler driving force over a wide range, increasing the traction force, and when the crawler slips, the soil in the groove is pushed out to the outside and below the crawler, improving the top front.

またラグの分岐部分を左右それぞれ３個の芯金投影面に
跨って斜め後方向に横断するように形成したので、芯金
投影面と芯金間とにおける履帯の剛性のアンバランスが
解消するとともに、履帯屈曲時の屈曲歪が広範囲に分散
する。更に、芯金間における下転軸支持力が左右ともに
増大し、下転軸の芯金間への落ち込み量が小さくなるの
で、走行時の振動が減少する。In addition, the branching parts of the lugs are formed so as to straddle the projection planes of the three core metals on the left and right sides and cross diagonally backward, eliminating the unbalance in rigidity of the track between the projection planes of the core metals and between the core metals. , the bending strain during crawler bending is dispersed over a wide range. Furthermore, the supporting force of the lower rolling shaft between the core metals increases on both the left and right sides, and the amount of drop of the lower rolling shaft between the core metals becomes smaller, so that vibrations during running are reduced.

［実施例コ 以下に本発明に係るゴム履帯の実施例について、図面を
参照して詳細に説明する。[Example 7] Examples of the rubber track according to the present invention will be described in detail below with reference to the drawings.

第１図（ａ）は請求項（１）〜（４）記載のゴム履帯を
接地面側から見た部分平面図、　（ｂ）は同じく部分側
面図である。なお第１図（ａ）においてはラグ頂面の部
分に斜線を施しである。このゴム履帯は無端のゴムベル
）１に、起動輪の１歯ごとに噛み合う金属芯金２を並列
に埋設したもので、これらの芯金２は第２図に示すよう
に、幅方向中央部に起動輪との噛み合い係合部３を備え
、その左右両側にそれぞれ誘導突出部４、転動レール面
５、翼部６を備えており、ゴムベル！・１０前後方向に
直角に、かつ一定間隔に設置されている。FIG. 1(a) is a partial plan view of a rubber crawler track according to claims (1) to (4) as viewed from the ground contact side, and FIG. 1(b) is a partial side view thereof. In FIG. 1(a), the top surface of the lug is shaded. This rubber crawler track consists of an endless rubber bell) 1 with metal core metals 2 embedded in parallel that mesh with each tooth of the driving wheel.As shown in Figure 2, these metal core metals 2 are embedded in the center in the width direction. It has a meshing engagement part 3 with the starting wheel, and has a guiding protrusion 4, a rolling rail surface 5, and a wing part 6 on both the left and right sides of the engaging part 3, and has a rubber bell!・10 They are installed at right angles to the front-rear direction and at regular intervals.

前記誘導突出部４と転勤レール面５は、噛み合い係合部
３、翼部６に対して互いに前後方向にオフセットして設
けられている。また前記芯金２の下面に近接して多数の
スチールコード７が履帯を一周するように前後方向に埋
設され、芯金２の置部６上面に近接して多数のスチール
または合成樹脂製コード８が履帯を一周するように前後
方向に埋設されている。The guiding protrusion 4 and the transfer rail surface 5 are provided offset from each other in the longitudinal direction with respect to the meshing engagement portion 3 and the wing portion 6. Further, a large number of steel cords 7 are buried in the front-rear direction close to the lower surface of the core metal 2 so as to go around the crawler track, and a large number of steel or synthetic resin cords 8 are adjacent to the upper surface of the placement part 6 of the core metal 2. is buried in the front and rear direction so as to go around the track.

ゴム履帯の幅方向中央部の、隣合う芯金間には起動輪と
の噛み合い係合穴９が設けられていて、芯金２の幅方向
中央部に設けられた噛み合い係合部３が起動輪の歯に噛
み合ったとき、前記噛み合い係合穴９によって起動輪の
歯先を逃がすようになっている。A meshing engagement hole 9 for engaging the starting wheel is provided between adjacent core metals at the widthwise central portion of the rubber track, and a meshing engagement portion 3 provided at the widthwise central portion of the core metal 2 is activated. When engaged with the teeth of the wheel, the tooth tips of the starting wheel are allowed to escape through the meshing engagement hole 9.

ゴム履帯の接地面側に形成されるラグは、隣合う噛み合
い係合穴９，９の間に設けられた中央部分１０と、噛み
合い係合穴９を挟んで隣合う２個の中央部分１０．１０
に連続し、ゴム履帯の左右端部に向かってそれぞれ斜め
後方向に遠ざかる分岐部分１１とからなっている。The lugs formed on the ground surface side of the rubber crawler track include a central portion 10 provided between adjacent meshing engagement holes 9, 9, and two central portions 10. 10
The rubber crawler track is continuous with the rubber crawler track and has branched parts 11 that extend diagonally backward toward the left and right ends of the rubber crawler track.

この分岐部分１１は、左右が互いに芯金１ピッチだけず
れて配設されているため、履帯の幅方向中心線に対して
左右が非対称であり、左右の分岐部分１１はそれぞれ隣
合う３個の芯金投影面を連続して斜め後方向に横断する
ように形成されている。またラグの中央部分１０と、こ
れに連続する分岐部分１１とによって噛み合い係合穴９
の３方を囲んでコの字状に形成されたラグの頂面１２が
、ゴム履帯の全周にわたって千鳥状に連続している。This branching part 11 is arranged so that the right and left sides are shifted from each other by one pitch of the core metal, so the left and right sides are asymmetrical with respect to the center line in the width direction of the crawler track. It is formed so as to continuously cross the projection plane of the core bar in the diagonal rear direction. Further, the central portion 10 of the lug and the branch portion 11 continuous to the central portion 10 engage with the engagement hole 9.
The top surface 12 of the lug, which is formed in a U-shape surrounding three sides of the rubber crawler track, continues in a staggered manner over the entire circumference of the rubber crawler track.

分岐部分１１におけるラグの頂面１２各部の前後方向長
さは、履帯の中央部から左右端部に向かって遠ざかるに
従って次第に短くなるように設定され、これに対応して
、隣合うラグ頂面１２間に形成されるグルーブ１３各部
の前後方向長さは、履帯の中央部から左右端部に向かっ
て遠ざかるに従って次第に長くなるように設定されてい
る。また、ラグの頂面１２と、頂面から一定の深さに設
けられたグルーブ底面１４との境界に形成される斜面は
、ラグの前側斜面１５においては中央部から端部に向か
って遠ざかるに従って次第にゆるやかな傾斜角となるよ
うな平面で構成され、ラグの後側斜面１６においては中
央部から端部にかけて同一傾斜角の平面で構成されてい
る。The longitudinal length of each part of the top surface 12 of the lug in the branching portion 11 is set to gradually become shorter as it moves away from the center of the crawler track toward the left and right ends, and correspondingly, the length of the top surface 12 of the lug adjacent to The longitudinal length of each part of the groove 13 formed therebetween is set to gradually increase as it moves away from the center of the crawler belt toward the left and right ends. Further, the slope formed at the boundary between the top surface 12 of the lug and the groove bottom surface 14 provided at a constant depth from the top surface increases as the front slope 15 of the lug moves away from the center toward the end. It is composed of a plane with a gradually gradual inclination angle, and the rear slope 16 of the lug is composed of a plane with the same inclination angle from the center to the end.

このようなラグの前側斜面１５は、履帯の左右端部に近
づくにつれて履帯の下方および側方に向くことになり、
第３図に示すようにせん断した土を下方に押す力Ｆｌ、
後方に押す力Ｆ２および履帯外側に押す力Ｆ３として作
用し、ＦｌおよびＦ３によって履帯駆動力による土庄分
布を広範囲に広げることができ、履帯幅を広げた場合と
同様の効果が得られることになり、けん引力が増大する
。The front slope 15 of such a lug faces downward and to the side of the crawler as it approaches the left and right ends of the crawler,
As shown in Figure 3, the force Fl pushing the sheared soil downward,
It acts as a force F2 pushing backwards and a force F3 pushing outwards of the crawler track, and Fl and F3 can widen the soil distribution caused by the track driving force over a wide range, resulting in the same effect as when the track width is widened. , the traction force increases.

その他、Ｆｌにより遊動輪下側でくさび効果を発揮して
土へのラグ食い込みを容易にし、履帯スリップ時には左
右外側方向への力Ｆ３とＦｌとにより土を履帯外側およ
び下方に押し出すので、グルーブには土がつまりにくい
。In addition, Fl exerts a wedge effect on the lower side of the idler wheel, making it easier for the lug to dig into the soil, and when the track slips, the force F3 and Fl in the left and right outward directions push the soil outward and downward, so that the groove is hard to get clogged with soil.

また、起動輪の１歯ごとに噛み合うショートピッチの芯
金を埋設し、ラグが隣合う３個の芯金投影面を連続して
斜め後方向に横断するように形成されているので、この
履帯が起動輪、遊動輪に巻き付いて屈曲したとき、屈曲
歪が小さく、かつ屈白子がグルーブの斜面に広く分散す
る。更に、芯金間にもラグが横断して存在し、履帯剛性
を高めていることと、芯金の左右転勤レール面が互いに
前後方向にオフセットしていることにより、走行時の芯
金間への下転輪落ち込みがほとんどなく、運転者や地盤
に対する振動が小さい。In addition, a short-pitch core metal that meshes with each tooth of the starting wheel is embedded, and the lugs are formed so as to continuously cross the projection plane of three adjacent core metals in a diagonal rearward direction. When it wraps around the starting wheel and idler wheel and bends, the bending strain is small and the bending particles are widely dispersed on the slope of the groove. Furthermore, there are lugs that cross between the core metals to increase crawler rigidity, and the left and right transfer rail surfaces of the core metal are offset from each other in the front-rear direction, so that the lugs cross between the core metals when running. There is almost no drop in the lower wheels, and there is little vibration to the driver or the ground.

［発明の効果コ 以上説明したように本発明によれば、起動輪の１歯ごと
に噛み合うことができるような金属芯金を埋設したゴム
履帯であることを前提条件とし、接地面側に設けるラグ
を中央部分と３個の芯金投影面を斜め後方向に横断する
左右の分岐部分とで構成し、中央部分と分岐部分との接
合点では、履帯全周にわたって千鳥状に連続して形成す
るとともに、各ラグの前側に設けるグルーブ斜面を、中
央部から左右端部に近づくにつれて次第にゆるやかな傾
斜角となる平面としたので、下記のように多大の効果が
得られる。[Effects of the Invention] As explained above, according to the present invention, it is a prerequisite that the rubber crawler track has a metal core embedded therein that can mesh with each tooth of the starting wheel, and the rubber crawler track is provided on the ground contact side. The lugs are composed of a central part and left and right branch parts that cross diagonally backward across the projection plane of the three core metals, and at the junction of the central part and the branch parts, they are continuously formed in a staggered manner over the entire circumference of the track. At the same time, since the groove slope provided on the front side of each lug is a flat surface whose inclination angle becomes gradually gentler as it approaches the left and right ends from the center, the following great effects can be obtained.

（１）履帯駆動力による土庄分布を３次元的に広範囲に
広げることができ、履帯幅を広げた場合と同様の効果が
得られる。またラグの分岐部分を左右互い違いに配置し
たので、グルーブすなわち土のせん断面積と、ラグ頂面
の面積との両者をともに大きくとることができ、かつ地
盤に加わる振動が小さいので、ラグのグルーブで捕捉し
た土を破壊せず駆動力を有効に地面に伝達することがで
きる。その結果、土の上においても、舗装路においても
高いけん引力を得ることができる。(1) The tonosho distribution due to the crawler driving force can be expanded three-dimensionally over a wide range, and the same effect as when the crawler width is widened can be obtained. In addition, since the branching parts of the lug are arranged alternately on the left and right, both the shear area of the groove, that is, the soil, and the area of the top surface of the lug can be made large, and the vibration applied to the ground is small, so the groove of the lug can be The driving force can be effectively transmitted to the ground without destroying the trapped soil. As a result, high traction power can be obtained both on dirt and on paved roads.

（２）千鳥状に連続するラグ中央部分が遊動輪下部で土
に食い込む際にくさび効果を発揮するので、ラグの食い
込み性がよく、履帯が横滑りしにくい。(2) The central part of the lug, which continues in a staggered pattern, creates a wedge effect when it bites into the soil at the bottom of the idler wheel, so the lug digs in well and the crawler track is less likely to skid.

（３）履帯がスリップしたとき、ラグ間に捕捉した土が
履帯外側および下側に押し出されるので、グルーブに土
が詰まりにくく、上舵れの良い履帯となる。(3) When the crawler slips, the soil trapped between the lugs is pushed out to the outside and below the crawler, so the grooves are less likely to be clogged with soil, resulting in a crawler with good upward steering.

（４）履帯が起動輪、遊動輪に巻き付いて屈曲したとき
、屈曲歪がグルーブの斜面に広く分散するので屈曲歪が
小さく、また芯金間にもラグが横断して存在し、履帯剛
性を高めているので、走行時の芯金間への下転輪落ち込
みがほとんどなく、運転者や地盤に対する振動が激減す
る。(4) When the crawler belt wraps around the starting wheel and idler wheel and bends, the bending strain is dispersed widely on the slope of the groove, so the bending strain is small, and lugs are also present across the core metals, increasing the track rigidity. Because the height is raised, there is almost no drop of the lower roller between the core metals during driving, and vibrations to the driver and the ground are drastically reduced.

（５）振動が小さく、けん引力が高いので、履帯スリッ
プの頻度が減少し、またラグ面積が大きいので、面圧が
低下する。これによりラグの摩耗を低減させることがで
きる。(5) Since the vibration is small and the traction force is high, the frequency of crawler track slip is reduced, and the lug area is large, so the surface pressure is reduced. This can reduce wear on the lugs.

（６）ラグ頂面各部の前後方向長さが履帯の左右端部に
近づくにつれて次第に小さくなるように形成されている
ので、車両の旋回時にくさび効果を発揮し、路面の抵抗
が小さくなり、ラグの欠けを防止することができる。(6) The longitudinal length of each part of the top surface of the lug is formed so that it gradually becomes smaller as it approaches the left and right ends of the track, creating a wedge effect when the vehicle turns, reducing road surface resistance, and can prevent chipping.

（７）その他、履帯の剛性増大による履帯のねじれ、ば
たつき、履帯外れの発生が防止されるとともに、履帯屈
曲時に屈曲部の減衰力が大きくなるため、起動輪や遊動
輪に対する履帯の衝突が緩和され、履帯叩き音が小さく
なるとともに、ゴムベルトの屈曲歪が低減されることに
より、ゴム履帯の破断を防止することがてき、履帯の耐
久性が向上する。(7) In addition, the increased rigidity of the track prevents the track from twisting, flapping, and coming off, and the damping force at the bent part increases when the track bends, reducing collisions of the track with the starting wheels and idler wheels. This reduces the crawler belt tapping sound and reduces the bending strain of the rubber belt, thereby preventing the rubber crawler from breaking and improving the durability of the crawler.

【図面の簡単な説明】 第１図（ａ）は請求項（１）〜（４）記載のゴム履帯を
接地面側から見た部分平面図、　（Ｌ））は同じく部分
側面図、第２図（ａ）は第１図（ａ）に示したゴム履帯
を転輪転勤面側から見た部分平面図、　（ｂ）は第２図
（ａ）におけるＡ、　−Ａ断面図、第３図はラグの前側
とグルーブ底面との境界に形成される前側斜面の機能説
明図である。 ｌ・・・・・・ゴムベルト ２・・・・・・芯金 ９・・・・・・噛み合い係合穴 １０・・・・・・中央部分 １１・・・・・・分岐部分 １２・・・・・・ラグ頂面 １３φ１◆φφグルーブ １４・・・・・・グルーブ底面[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1(a) is a partial plan view of the rubber crawler track according to claims (1) to (4) as seen from the ground contact side, FIG. 1(L)) is a partial side view, and FIG. Figure (a) is a partial plan view of the rubber crawler shown in Figure 1 (a), viewed from the wheel rolling surface side, (b) is a sectional view of A - A in Figure 2 (a), and Figure 3. FIG. 2 is a functional explanatory diagram of a front slope formed at the boundary between the front side of the lug and the bottom surface of the groove. l...Rubber belt 2...Core bar 9...Meshing engagement hole 10...Central portion 11...Branch portion 12... ...Lug top surface 13φ1◆φφ groove 14...Groove bottom surface

Claims (4)

【特許請求の範囲】[Claims] （１）走行部分に巻装される無端のゴムベルト１に、起
動輪の１歯ごとに噛み合う金属芯金２を埋設した装軌車
両のゴム履帯であって、このゴム履帯の幅方向中央部の
、隣合う芯金間に起動輪との噛み合い係合穴９を設ける
とともに、接地面側に設けるラグを、隣合う噛み合い係
合穴９の間に設けた中央部分１０と、噛み合い係合穴９
を挟んで隣合う２個の中央部分１０に連続し、ゴム履帯
の左右端部に向かつてそれぞれ斜め後方向に遠ざかる分
岐部分１１とで構成したことを特徴とするゴム履帯。(1) A rubber crawler for a tracked vehicle in which a metal core 2 that meshes with each tooth of a starting wheel is embedded in an endless rubber belt 1 that is wrapped around the running part, and the rubber crawler is located at the center of the width of the rubber crawler. , an engagement hole 9 for meshing with the starting wheel is provided between adjacent core metals, and a lug provided on the ground surface side is connected to a central portion 10 provided between adjacent meshing and engagement holes 9.
The rubber crawler track is characterized in that it is constituted by branching parts 11 which are continuous to two central parts 10 adjacent to each other with the rubber track in between, and branch parts 11 which extend toward the left and right ends of the rubber track and away from each other in a diagonal rear direction. （２）ラグの分岐部分１１が左右で芯金１ピッチだけず
れるように配設し、左右の分岐部分１１がそれぞれ隣合
う３個の芯金投影面を連続して斜めに横断するように形
成したことを特徴とする請求項（１）記載のゴム履帯。(2) The branch parts 11 of the lug are arranged so that they are shifted by one pitch of the core metal on the left and right, and the left and right branch parts 11 are formed so as to continuously and diagonally cross the projection plane of the three adjacent core metals. The rubber crawler track according to claim (1), characterized in that: （３）ラグの中央部分１０と、これに連続する分岐部分
１１とによって噛み合い係合穴９の３方を囲むように形
成されるラグ頂面１２が、ゴム履帯の全周にわたって千
鳥状に連続していることを特徴とする請求項（２）記載
のゴム履帯。(3) The top surface 12 of the lug, which is formed by the central portion 10 of the lug and the branched portion 11 continuous thereto and surrounds three sides of the engagement hole 9, is continuous in a staggered manner over the entire circumference of the rubber track. The rubber track according to claim (2), characterized in that: （４）分岐部分１１におけるラグ頂面１２各部の前後方
向長さを、履帯の中央部から左右端部に向かって遠ざか
るに従って次第に短くなるように設定し、これに対応し
て、隣合うラグ頂面１２間に形成されるグルーブ１３各
部の前後方向長さを、履帯の中央部から左右端部に向か
って遠ざかるに従って次第に長くなるように設定すると
ともに、ラグ頂面１２とラグ頂面１２から一定の深さに
設けられたグルーブ底面１４との境界に形成される斜面
を、ラグの前側においては中央部から左右端部に向かっ
て遠ざかるに従って次第にゆるやかな傾斜角となるよう
な平面とし、ラグの後側においては中央部から左右端部
にかけて同一傾斜角の平面としたことを特徴とする請求
項（２）記載のゴム履帯。(4) The longitudinal length of each part of the lug top surface 12 in the branching part 11 is set so that it gradually becomes shorter as it goes away from the center of the crawler track toward the left and right ends, and correspondingly, The longitudinal length of each part of the groove 13 formed between the surfaces 12 is set so that it gradually increases as it moves away from the center of the crawler track toward the left and right ends, and is set to be constant from the lug top surface 12 to the lug top surface 12. On the front side of the lug, the slope formed at the boundary with the groove bottom surface 14, which is provided at a depth of 3. The rubber track according to claim 2, wherein the rear side has a flat surface having the same inclination angle from the center to the left and right ends.