JP2006069416A

JP2006069416A - Elastic crawler

Info

Publication number: JP2006069416A
Application number: JP2004256709A
Authority: JP
Inventors: Yoshiro Ueno; ▲吉▼郎上野
Original assignee: Sumitomo Rubber Industries Ltd
Current assignee: Sumitomo Rubber Industries Ltd
Priority date: 2004-09-03
Filing date: 2004-09-03
Publication date: 2006-03-16
Anticipated expiration: 2024-09-03
Also published as: JP4157863B2

Abstract

PROBLEM TO BE SOLVED: To provide an elastic crawler capable of improving the ride quality by suppressing the vibration of a crawler traveling device. SOLUTION: A lug group R comprises main lugs 10 which are arranged in a staggered manner at a predetermined interval in the circumferential direction, and auxiliary lugs 11 which are arranged on right and left sides of a center part in the width direction of a roller ground contact area T between the main lugs 10 adjacent to each other in the circumferential direction in a deviated state in the circumferential direction. The main lugs 10 and the auxiliary lugs 11 are arranged alternately in the circumferential direction so that any periodic rigidity difference of a crawler body 7 occurs. COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、各種のクローラ走行装置に使用される弾性クローラに関する。 The present invention relates to an elastic crawler used for various crawler traveling devices.

クローラ走行装置はコンバイン等の農業機械、バックホー等の建設作業機械等に幅広く用いられている。これらのクローラ走行装置には無端状の弾性クローラが装着され、この弾性クローラは、周方向において一定間隔おきに並ぶ複数の駆動突起が内周面に形成されたクローラ本体と、このクローラ本体の外周面に所定のラグパターンで形成されたラグ群と、クローラ本体の内部に周方向に沿って埋設された抗張体とを備えている。上記ラグをクローラ本体に形成する配列に関しては、例えば図９（ａ）に示すように、ラグの長さを長短変化させてその長さの長いラグと短いラグとが千鳥状に配列されたものや、図９（ｂ）に示すように、中途部で屈曲させた単一の屈曲ラグが配列されたもの等、種々の配列パターンが採用されている。さらに、トラクション性能の向上、ラグ間の排泥性の向上のために、図９（ｃ）に示すように、回転方向前方側に凸となる山形状に形成された中央部と回転方向後方側に凸となる湾曲状に形成された側部とで構成されたラグが配列されたものがある（例えば、特許文献１参照）。
特開２００４−９８８９８号公報 Crawler traveling devices are widely used in agricultural machines such as combine harvesters and construction work machines such as backhoes. These crawler travel devices are equipped with endless elastic crawlers. The elastic crawler includes a crawler main body having a plurality of drive protrusions arranged on the inner peripheral surface at regular intervals in the circumferential direction, and an outer periphery of the crawler main body. A lug group formed with a predetermined lug pattern on the surface and a tensile body embedded in the crawler body along the circumferential direction are provided. With respect to the arrangement for forming the lugs on the crawler body, for example, as shown in FIG. 9A, the length of the lugs is changed in length, and the long lugs and the short lugs are arranged in a staggered manner. Further, as shown in FIG. 9B, various arrangement patterns such as one in which a single bent lug bent in the middle is arranged are employed. Furthermore, in order to improve the traction performance and the drainage between the lugs, as shown in FIG. 9 (c), a central portion formed in a mountain shape that protrudes forward in the rotational direction and the rear side in the rotational direction There are some in which lugs composed of curved side portions that are convex are arranged (see, for example, Patent Document 1).
JP 2004-98898 A

しかしながら、図９（ａ）に示した長短のラグを備える弾性クローラでは、周方向において、長ラグ、長ラグ、小ラグ、小ラグ、・・・といった周期が生じており、長ラグから次ぎの長ラグまでの間隔が長く、駆動突起の左右を転動する転輪が、長ラグから長ラグへ移るまでに、短ラグの周方向領域を必ず越えていかなければならない。その一方で、長ラグの周辺部と短ラグの周辺部との間には、クローラ本体の剛性差が存在する。したがって、上記転輪が、長ラグ領域、短ラグ領域を周期的に越えていくことで、これらの剛性差により、当該転輪の下方への落ち込み量の差が生じ、転輪の上下動となる。そして、この転輪の上下動が、クローラ走行装置の振動源となる。また、図９（ｂ）や図９（ｃ）に示した屈曲ラグ、湾曲ラグを備える弾性クローラでは、上記のような長短のラグの剛性差はないものの、隣接する当該屈曲ラグ間、湾曲ラグ間に広い隙間が存在する。左右ラグに少しでもまたがった芯金等の幅方向補強体がある場合、転輪が片方のラグにくることで当該芯金を介して両側のラグで支えることとなり転輪の落ち込みは少ないが、同弾性クローラには幅方向補強体（芯金）がないので、前記隙間に転輪がくると転輪の下方への落ち込みが生じる。したがって、上記と同様にこれがクローラ走行装置の振動源となる。上述のように発生した振動源は、弾性クローラ走行装置を装備した作業機械に伝播し、乗り心地が悪くなるという問題があった。
本発明は、このような従来の問題点に鑑み、クローラ走行装置の振動を抑制し、乗り心地を向上することができる弾性クローラを得ることを目的とする。 However, in the elastic crawler including the long and short lugs shown in FIG. 9A, a cycle such as a long lug, a long lug, a small lug, a small lug, and the like is generated in the circumferential direction. The distance between the long lugs and the rolling wheels that roll on the left and right of the drive protrusion must always exceed the circumferential region of the short lugs before moving from the long lugs to the long lugs. On the other hand, there is a difference in the rigidity of the crawler body between the periphery of the long lug and the periphery of the short lug. Therefore, when the rolling wheel periodically exceeds the long lug region and the short lug region, a difference in the amount of the downward rolling of the rolling wheel is generated due to the difference in rigidity between the rolling wheel and the vertical movement of the rolling wheel. Become. The up and down movement of the wheel serves as a vibration source for the crawler traveling device. Further, in the elastic crawler including the bent lug and the curved lug shown in FIG. 9B and FIG. 9C, there is no difference in rigidity between the long and short lugs as described above, but between the adjacent bent lugs, the curved lug There is a wide gap between them. If there is a widthwise reinforcing body such as a core straddling the left and right lugs as much as possible, the wheel will be supported by the lugs on both sides via the core metal by coming to one of the lugs, but there is little drop of the wheel, Since the elastic crawler does not have a width direction reinforcing body (core metal), if a wheel comes into the gap, the roller falls downward. Therefore, this is the vibration source of the crawler traveling device as described above. The vibration source generated as described above is transmitted to the work machine equipped with the elastic crawler traveling device, and there is a problem that the ride comfort is deteriorated.
The present invention has been made in view of such conventional problems, and an object of the present invention is to obtain an elastic crawler that can suppress vibration of the crawler traveling device and improve riding comfort.

上記目的を達成するため、本発明は次の技術的手段を講じた。
すなわち、本発明は、周方向において一定間隔おきに並ぶ複数の駆動突起が内周面に形成されたクローラ本体と、このクローラ本体の外周面に所定のラグパターンで形成されたラグ群と、前記クローラ本体の内部に周方向に沿って埋設された抗張体と、を備えている弾性クローラにおいて、前記ラグ群は、次の（ａ）で定義される複数のメインラグと、（ｂ）で定義される複数の補助ラグとから構成され、これらメインラグと補助ラグとが、クローラ本体の周期的な剛性差が生じないように周方向で交互に配置されていることを特徴とする。（ａ）周方向において所定間隔おきに千鳥状に配置されたメインラグ（ｂ）周方向で隣接する前記メインラグ間において、転輪接地領域の幅方向中央部の左右両側に配置され、周方向で互いにずれた状態で配置された補助ラグ In order to achieve the above object, the present invention takes the following technical means.
That is, the present invention provides a crawler body in which a plurality of drive protrusions arranged at regular intervals in the circumferential direction are formed on the inner peripheral surface, a lug group formed in a predetermined lug pattern on the outer peripheral surface of the crawler body, In the elastic crawler provided with a tensile body embedded along the circumferential direction inside the crawler body, the lug group is defined by a plurality of main lugs defined in (a) below, and (b) The main lugs and the auxiliary lugs are alternately arranged in the circumferential direction so as not to cause a periodic rigidity difference of the crawler main body. (A) Main lugs arranged in a zigzag pattern at predetermined intervals in the circumferential direction (b) Between the main lugs adjacent in the circumferential direction, arranged on the left and right sides of the center in the width direction of the wheel contact area, and mutually in the circumferential direction Auxiliary lugs placed out of position

上記本発明の弾性クローラによれば、千鳥状のメインラグとこのメインラグ間で周方向に互いにずれた状態の補助ラグとが、クローラ本体の周期的な剛性差が生じないように周方向で交互に配置されているので、メインラグ間の隙間が補助ラグで補強されて、クローラ本体の周期的な剛性差がなくなる。したがって、駆動突起の左右を転動する転輪が、従来のように剛性の高い領域、剛性の低い領域を周期的に移っていくようなことがなく、転輪の上下動（転輪の変位差）が低減される。これにより、クローラ走行装置の振動源がなくなり、乗り心地を向上することができる。また、メインラグ間に補助ラグが存在することから、メインラグ間の隙間に石等の突起部が入り難く、当該メインラグ間におけるクローラ本体の外周面の損傷を防止することができる。さらに、メインラグの存在により軟弱地における牽引性能を損なうことがない。 According to the above-described elastic crawler of the present invention, the staggered main lugs and the auxiliary lugs that are displaced from each other in the circumferential direction between the main lugs are alternately arranged in the circumferential direction so that the cyclic rigidity difference of the crawler body does not occur. Since it is arrange | positioned, the clearance gap between main lugs is reinforced with an auxiliary lug, and the cyclic | annular rigidity difference of a crawler main body is eliminated. Therefore, the rolling wheels that roll on the left and right of the drive protrusion do not periodically move between the high rigidity region and the low rigidity region as in the past, and the vertical movement of the wheel (displacement of the wheel). Difference) is reduced. Thereby, the vibration source of the crawler traveling device is eliminated, and the riding comfort can be improved. Further, since there is an auxiliary lug between the main lugs, it is difficult for protrusions such as stones to enter the gaps between the main lugs, and damage to the outer peripheral surface of the crawler body between the main lugs can be prevented. Furthermore, the presence of the main lug does not impair the traction performance in soft ground.

上記ラグの配置には、横一文字に配置されたものなどがあるが、メインラグ及び補助ラグのうち少なくとも一方が、クローラ本体の幅方向外側に向かうに従ってクローラ回転方向後方に傾斜していることが好ましい。この場合、弾性クローラの幅方向外側への排土性が発揮されることになるので、トラクション性能と排土性とが両立したバランスの良い走行性能を達成することができる。また、メインラグと補助ラグとを異なる角度で傾斜させれば、ラグ間に詰まった泥土がより排出され易くなり排土性を向上することができる。 The lugs are arranged in a single horizontal character, but it is preferable that at least one of the main lug and the auxiliary lug is inclined backward in the crawler rotation direction toward the outer side in the width direction of the crawler body. . In this case, since the soil removal property to the outside in the width direction of the elastic crawler is exhibited, it is possible to achieve a well-balanced traveling performance in which both the traction performance and the soil removal property are compatible. Further, if the main lug and the auxiliary lug are inclined at different angles, the mud clogged between the lugs can be more easily discharged, and the soil removal performance can be improved.

上記の本発明において、メインラグが、駆動突起の形成領域をクローラ本体の幅方向で跨ぐように配置されていることが好ましく、この場合メインラグ周辺のクローラ本体の剛性が大きくなることから、牽引性能が向上する。また、メインラグが、駆動突起の両側にくる転輪の転輪接地領域と重なり合うように配置されていることで、転輪がメインラグの上を通過することになり、転輪の下方への落ち込みが少なくなり当該転輪の上下動が低減され、上記振動の抑制効果が大きくなる。 In the present invention described above, the main lug is preferably arranged so as to straddle the formation region of the drive protrusion in the width direction of the crawler body, and in this case, the rigidity of the crawler body around the main lug is increased, so that the traction performance is improves. Moreover, since the main lug is arranged so as to overlap with the wheel contact area of the wheel on both sides of the drive projection, the wheel passes over the main lug, and the wheel falls downward. As a result, the vertical movement of the wheel is reduced, and the vibration suppressing effect is increased.

上記の本発明において、メインラグが、隣接する補助ラグとクローラ本体の幅方向で重なり合うように配置された弾性クローラとすることで、メインラグのクローラ本体の幅方向対称位置に補助ラグが存在し、クローラ本体の幅方向の剛性差が少なくなることから、左右の転輪の上下動の差が減少し振動の抑制効果が高まる。さらに、メインラグをクローラ本体の幅方向中央部において隣接する他のメインラグと周方向で重なるように配置してもよく、この場合には転輪がメインラグ上を通過した際の転輪の下方への力が、クローラ本体の幅方向へより広く分散される。これにより、転輪の上下動が減少することから振動がさらに抑制される。 In the present invention, the main lug is an elastic crawler disposed so as to overlap with the adjacent auxiliary lug in the width direction of the crawler body, so that the auxiliary lug exists in the width direction symmetrical position of the crawler body of the main lug, and the crawler Since the difference in rigidity in the width direction of the main body is reduced, the difference in vertical movement between the left and right wheels is reduced, and the vibration suppressing effect is enhanced. Further, the main lug may be arranged so as to overlap with the other adjacent main lug in the central portion in the width direction of the crawler body in this case, and in this case, the roller is moved downwardly when the roller passes over the main lug. The force is more widely distributed in the width direction of the crawler body. As a result, the vertical movement of the wheel is reduced, so that vibration is further suppressed.

また、上記の本発明において、メインラグ及び補助ラグのうち少なくとも一方が、周方向に向かって延設された突出部を有するとともに、周方向で隣接するメインラグと補助ラグとの対向壁面間が、前記クローラ本体の幅方向外側に向かうに従って広がっていることが好ましい。この場合、メインラグ、補助ラグのうち少なくとも一方に周方向に向かって延設された突出部が設けられているので、振動が低減され、又メインラグの先端部の耐摩耗向上にもなり、さらに周方向で隣接するメインラグと補助ラグとの対向壁面間が、クローラ本体の幅方向外側に向かうに従って広がっているので、高い排土性を得ることができる。 In the present invention, at least one of the main lug and the auxiliary lug has a protruding portion extending in the circumferential direction, and the gap between the opposing wall surfaces of the main lug and the auxiliary lug adjacent in the circumferential direction is It is preferable that the width of the crawler body expands toward the outside in the width direction. In this case, since at least one of the main lug and the auxiliary lug is provided with a projecting portion extending in the circumferential direction, vibration is reduced and wear resistance of the front end portion of the main lug is improved. Since the space between the opposing wall surfaces of the main lug and the auxiliary lug that are adjacent in the direction widens toward the outer side in the width direction of the crawler main body, high soil removal performance can be obtained.

また、メインラグ及び補助ラグが、転輪接地領域と重なり合い、かつ、転輪接地領域で周方向に連続するように配置されていることが好ましい。このようにすることで、転輪接地領域において、メインラグと補助ラグとが、周方向に連続して転輪を支承し続けることができるので、転輪の下方への落ち込みが極めて少なくなり振動の発生を効果的に抑制することができる。 Further, it is preferable that the main lug and the auxiliary lug are arranged so as to overlap with the wheel contact area and to be continuous in the circumferential direction in the wheel contact area. By doing so, the main lug and the auxiliary lug can continue to support the wheel continuously in the circumferential direction in the contact area of the wheel, so that the rolling down of the wheel is extremely reduced and vibration is reduced. Generation | occurrence | production can be suppressed effectively.

上記の通り、本発明によれば、クローラ本体の周期的な剛性差が生じないようにして転輪の上下動を低減したので、クローラ走行装置の振動が抑制され、乗り心地を向上することができる。 As described above, according to the present invention, since the vertical movement of the wheel is reduced so as not to cause the cyclic rigidity difference of the crawler main body, the vibration of the crawler traveling device is suppressed and the ride comfort can be improved. it can.

以下、図面を参照しつつ、本発明の実施形態を説明する。図１、図２は、本発明の第一実施形態に係る弾性クローラ１を示し、図３は、この弾性クローラ１を用いたクローラ式走行装置２を示している。図３に示すように、この場合のクローラ走行装置２は、農業機械や建設作業機械等に使用されるもので、走行機体の前後に設けられたスプロケット３、アイドラ４、及びこれらスプロケット３とアイドラ４との間に列設された複数の転輪５で構成される車輪群と、これら車輪に巻き掛けられた弾性クローラ１とで構成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an elastic crawler 1 according to the first embodiment of the present invention, and FIG. 3 shows a crawler type traveling device 2 using the elastic crawler 1. As shown in FIG. 3, the crawler traveling device 2 in this case is used for an agricultural machine, a construction work machine, or the like, and includes a sprocket 3 and an idler 4 provided before and after the traveling machine body, and the sprocket 3 and the idler. 4 is composed of a wheel group composed of a plurality of rolling wheels 5 arranged in between, and an elastic crawler 1 wound around these wheels.

図２に示すように、本実施形態の弾性クローラ１は、幅方向に延びる芯金（補強体）が入っていない芯金レスとして構成されたものであり、複数の駆動突起６が形成されたクローラ本体７と、このクローラ本体７の外周面７ａに所定のラグパターンで形成されたラグ群Ｒと、同クローラ本体７の内部に周方向に沿って埋設された抗張体２６（メインスチールコード）とを備えている。さらに、この弾性クローラ１は、上記抗張体２６の内周面側において駆動突起６の左右両側の転輪軌道に沿うように埋設された補強層２７と、上記抗張体の接地側に埋設された二層のバイアススチールコードからなる補強コード２８とを備えている。 As shown in FIG. 2, the elastic crawler 1 of the present embodiment is configured as a core bar-less without a core bar (reinforcing body) extending in the width direction, and a plurality of drive protrusions 6 are formed. The crawler body 7, a lug group R formed in a predetermined lug pattern on the outer peripheral surface 7a of the crawler body 7, and a tensile body 26 (main steel cord) embedded in the crawler body 7 along the circumferential direction ). Further, this elastic crawler 1 is embedded on the inner peripheral surface side of the tensile body 26 so as to be embedded along the rolling raceways on the left and right sides of the drive projection 6 and embedded on the grounding side of the tensile body. And a reinforcing cord 28 made of a two-layered bias steel cord.

このうち、クローラ本体７は、ゴム製の弾性体によってほぼ一定厚さの無端帯状に形成されており、このクローラ本体７の内周面７ｂにおける幅方向（図１の左右方向）中央部に、当該クローラ本体７よりも硬度の高いゴム製の弾性体からなる上記駆動突起６が突設されている。この駆動突起６は、周方向に一定間隔をおいてクローラ本体１の全周に渡って設けられており、この各駆動突起６に上記スプロケット３を係合させることにより、弾性クローラ１を回転方向Ｘに沿って駆動できるようになっている。また、抗張体は、周方向に沿って延設されたスチールコード等よりなるものである。クローラ走行装置２の転輪５は、クローラ本体７の幅方向に一定間隔をおいて同軸心状に一体化された左右一対の円形車輪部５Ａ，５Ａを有しており、この両車輪部５Ａ，５Ａは、その間で駆動突起６を跨いだ状態でクローラ本体７の内周面７ｂに当接するようになっている。なお、駆動突起７の内部に、硬質樹脂製又は金属製の補強部材を埋設することにしてもよい。 Among these, the crawler main body 7 is formed in an endless belt shape having a substantially constant thickness by a rubber elastic body, and the crawler main body 7 has a central portion in the width direction (left and right direction in FIG. 1) on the inner peripheral surface 7b. The drive protrusion 6 made of a rubber elastic body having a hardness higher than that of the crawler body 7 is provided. The drive protrusions 6 are provided over the entire circumference of the crawler main body 1 at regular intervals in the circumferential direction. By engaging the sprockets 3 with the drive protrusions 6, the elastic crawler 1 is rotated in the rotation direction. It can be driven along X. The tensile body is made of a steel cord or the like extending along the circumferential direction. The wheel 5 of the crawler traveling device 2 has a pair of left and right circular wheel portions 5A and 5A that are coaxially integrated with a constant interval in the width direction of the crawler body 7, and the two wheel portions 5A. , 5A is in contact with the inner peripheral surface 7b of the crawler body 7 with the drive projection 6 straddling it. A hard resin or metal reinforcing member may be embedded in the drive protrusion 7.

図１に示すように、本実施形態のラグ群Ｒは、周方向において所定間隔おきに千鳥状に配置されたメインラグ１０と、周方向で隣接する当該メインラグ１０間において、転輪接地領域Ｔの幅方向中央部の左右両側に配置され、周方向で互いにずれた状態で配置された補助ラグ１１とから構成されている。上記メインラグ１０は、クローラ本体７の縁部から同中央部を越えたところまで延びており、補助ラグ１１は、クローラ本体７の縁部から同中央部の手前まで延びている。メインラグ１０及び補助ラグ１１は、それぞれ周方向に等ピッチで設けられており、このうち補助ラグ１１は、当該補助ラグ１１の回転方向後方側で隣接したメインラグ１０よりも、当該補助ラグ１１の回転方向前方側で隣接したメインラグ１０の方へ寄ったところに配置されている。そして、このように配置されたメインラグ１０と補助ラグ１１とで、クローラ本体１の周期的な剛性差が生じないようになっている。また、クローラ本体７の外周面７ａにおいて、メインラグ１０が占める面積をＡ、補助ラグ１１が占める面積をＢとした場合、これらメインラグ１０と補助ラグ１１とは、０．３＜Ｂ／Ａ＜０．８となるように構成されている。 As shown in FIG. 1, the lug group R of the present embodiment includes a rolling contact grounding region T between the main lugs 10 arranged in a staggered manner at predetermined intervals in the circumferential direction and the main lugs 10 adjacent in the circumferential direction. It is comprised from the auxiliary | assistant lug 11 arrange | positioned in the state shifted | deviated mutually in the circumferential direction, arrange | positioned at the left-right both sides of the center part of the width direction. The main lug 10 extends from the edge of the crawler body 7 to a position beyond the center, and the auxiliary lug 11 extends from the edge of the crawler body 7 to the front of the center. The main lug 10 and the auxiliary lug 11 are provided at equal pitches in the circumferential direction. Among these, the auxiliary lug 11 rotates more than the main lug 10 adjacent on the rear side in the rotational direction of the auxiliary lug 11. It is arranged at a position close to the adjacent main lug 10 on the front side in the direction. And the cyclic | annular rigidity difference of the crawler main body 1 does not arise with the main lug 10 and the auxiliary lug 11 which are arrange | positioned in this way. Further, in the outer peripheral surface 7a of the crawler main body 7, when the area occupied by the main lug 10 is A and the area occupied by the auxiliary lug 11 is B, the main lug 10 and the auxiliary lug 11 are 0.3 <B / A <0. .8.

なお、本実施形態の上記メインラグ１０及び補助ラグ１１は、それぞれ周方向に等ピッチで配置しているが、これらを周方向に異なるピッチでも配置してもよい。メインラグ（補助ラグ）を異なるピッチで配置するとは、あるメインラグ（補助ラグ）間の間隔と、その次のメインラグ（補助ラグ）間の間隔を変えることをいう。この場合、メインラグ間に設ける補助ラグは、当該メインラグとの関係において、クローラ本体の周期的な剛性差が生じないように設けられる。 In addition, although the said main lug 10 and the auxiliary | assistant lug 11 of this embodiment are each arrange | positioned at equal pitches in the circumferential direction, you may arrange | position these also in the pitch which differs in the circumferential direction. Arranging the main lugs (auxiliary lugs) at different pitches means changing the interval between certain main lugs (auxiliary lugs) and the interval between the next main lugs (auxiliary lugs). In this case, the auxiliary lug provided between the main lugs is provided so as not to cause a periodic difference in rigidity of the crawler body in relation to the main lug.

このように、千鳥状のメインラグ１０とこのメインラグ１０間で周方向に互いにずれた状態の補助ラグ１１とが、クローラ本体７の剛性差が生じないように周方向で交互に配置されているので、メインラグ１０間の隙間Ｓが補助ラグ１１で補強されて、クローラ本体７の周方向における周期的な剛性差が無くなる。したがって、駆動突起６の左右を転動する転輪５が、従来のように剛性の高い領域、剛性の低い領域を周期的に移っていくようなことがなく、転輪５の上下動（転輪５の変位差）が低減される。これにより、クローラ走行装置２の振動源がなくなり、乗り心地を向上することができる。 As described above, the staggered main lugs 10 and the auxiliary lugs 11 that are shifted from each other in the circumferential direction between the main lugs 10 are alternately arranged in the circumferential direction so as not to cause a difference in rigidity of the crawler body 7. The gap S between the main lugs 10 is reinforced by the auxiliary lugs 11, and the cyclic rigidity difference in the circumferential direction of the crawler body 7 is eliminated. Therefore, the rolling wheels 5 that roll on the left and right of the drive protrusion 6 do not periodically move between the high rigidity region and the low rigidity region unlike the conventional case, and the vertical movement (rolling) of the rolling wheels 5 does not occur. The displacement difference of the wheel 5 is reduced. Thereby, the vibration source of the crawler traveling device 2 is eliminated, and riding comfort can be improved.

さらに、メインラグ１０間に補助ラグ１１が存在することから、メインラグ１０間の隙間Ｓに石等の突起物が入り難く、当該メインラグ１０間におけるクローラ本体７の外周面７ａの損傷を防止することができる。すなわち、従来技術の弾性クローラでは、転輪のエッジ部による応力集中で突起乗り上げ時にゴムが伸ばされ、カット傷を受けるが、本実施形態の弾性クローラ１では、補助ラグ１１があるのでこれを防ぐことができる。また、クローラ本体７の端部から中央部を越えるとこまで延びたメインラグ１０の存在により軟弱地における牽引性能を損なうことがない。
図１に示すようにメインラグ１０及び補助ラグ１１は、クローラ本体７の幅方向外側に向かうに従って回転方向Ｘ後方に傾斜している。このように傾斜したメインラグ１０及び補助ラグ１１によって、弾性クローラの幅方向外側への排土性が発揮されることになるので、トラクション性能と排土性とが両立したバランスの良い走行性能を達成することができる。なお、メインラグ１０と補助ラグ１１とを異なる角度で傾斜させてもよく、この場合、メインラグ１０と補助ラグとの間の泥土が排出され易くなり排土性を向上することができる。 Further, since the auxiliary lug 11 exists between the main lugs 10, it is difficult for protrusions such as stones to enter the gap S between the main lugs 10, and damage to the outer peripheral surface 7 a of the crawler body 7 between the main lugs 10 can be prevented. it can. That is, in the conventional elastic crawler, the rubber is stretched due to stress concentration due to the edge portion of the wheel, and the cut is scratched. However, in the elastic crawler 1 of this embodiment, the auxiliary lug 11 is provided to prevent this. be able to. Further, the presence of the main lug 10 extending from the end of the crawler body 7 beyond the center does not impair the traction performance in soft ground.
As shown in FIG. 1, the main lug 10 and the auxiliary lug 11 are inclined rearward in the rotational direction X toward the outer side in the width direction of the crawler body 7. Since the main lug 10 and the auxiliary lug 11 that are inclined in this manner exhibit the soil removal performance to the outside in the width direction of the elastic crawler, a well-balanced traveling performance that achieves both traction performance and soil removal performance is achieved. can do. Note that the main lug 10 and the auxiliary lug 11 may be inclined at different angles. In this case, the mud between the main lug 10 and the auxiliary lug can be easily discharged, and the soil removal performance can be improved.

また、図１に示すように、メインラグ１０が、駆動突起６の形成領域をクローラ本体７の幅方向で跨ぐように配置されており、これによってメインラグ１０周辺のクローラ本体７の剛性が大きくなることから、牽引性能がさらに向上する。当該メインラグ１０が、駆動突起６の両側にくる転輪５Ａ、５Ａの転輪接地領域Ｔと重なり合うように配置されており、このことから当該転輪５Ａ，５Ａがメインラグ１０上を通過することになるので、転輪５Ａ，５Ａの下方への落ち込みが少なくなる。これにより、転輪５Ａ、５Ａの上下動がさらに低減され、振動の抑制効果が大きくなっている。 Further, as shown in FIG. 1, the main lug 10 is arranged so as to straddle the formation region of the drive protrusion 6 in the width direction of the crawler body 7, thereby increasing the rigidity of the crawler body 7 around the main lug 10. Therefore, the traction performance is further improved. The main lug 10 is arranged so as to overlap with the wheel contact area T of the rolling wheels 5A and 5A on both sides of the drive protrusion 6, and therefore the rolling wheels 5A and 5A pass over the main lug 10. Thus, the downward rolling of the wheels 5A and 5A is reduced. As a result, the vertical movement of the wheels 5A and 5A is further reduced, and the vibration suppressing effect is increased.

また、メインラグ１０の一端部から他端部に亘る周方向範囲に、このメインラグ１０のクローラ本体の幅方向対称位置にある補助ラグ１１全体が入っている。このように、メインラグ１０とこれに隣接する補助ラグ１１とが、クローラ本体７の幅方向で重なるように配置されていることから、クローラ本体７の幅方向における剛性差が少なくなり、左右の転輪５Ａ、５Ａの変位差が減少する。これにより、振動の抑制効果をさらに高めることができる。また、メインラグ１０が、クローラ本体７の幅方向中央部において周方向で重なるように配置されており、転輪の下方への力がクローラ本体７の幅方向へより広く分散される。これにより、クローラ本体７の剛性が平準化されて振動を低く抑えることができる。さらに、メインラグ１０及び補助ラグ１１のクローラ本体の幅方向中央部側の端部に、それぞれ周方向（回転方向前方）へ向かって延設された突出部１２、１３が形成されており、振動が低減されると共に、メインラグ１０の先端部の耐摩耗が向上する。 Further, the entire auxiliary lug 11 at the symmetrical position in the width direction of the crawler body of the main lug 10 is contained in a circumferential range extending from one end portion to the other end portion of the main lug 10. Thus, since the main lug 10 and the auxiliary lug 11 adjacent thereto are arranged so as to overlap in the width direction of the crawler body 7, the difference in rigidity in the width direction of the crawler body 7 is reduced, so The displacement difference between the wheels 5A and 5A decreases. Thereby, the suppression effect of a vibration can further be heightened. Further, the main lugs 10 are arranged so as to overlap in the circumferential direction at the center in the width direction of the crawler body 7, and the downward force of the wheel is more widely dispersed in the width direction of the crawler body 7. Thereby, the rigidity of the crawler main body 7 is leveled, and vibration can be suppressed low. Furthermore, projecting portions 12 and 13 extending toward the circumferential direction (forward in the rotational direction) are formed at the end portions of the main lug 10 and the auxiliary lug 11 on the crawler main body side in the width direction, and vibration is generated. In addition to being reduced, the wear resistance of the tip of the main lug 10 is improved.

図４は、本発明に係る第２実施形態を示している。本実施形態が上記第１実施形態と異なる主な点は、メインラグ１５がクローラ本体７の幅方向中央部を越えないような長さで形成されており、このメインラグ１５間に配置されている補助ラグ１６の形状が上記第１実施形態の補助ラグ１１とは異なっている点である。左右のメインラグ１５は、それぞれ等ピッチで千鳥状に配置されており、隣接するメインラグ１５間の補助ラグ１６も同様に、等ピッチで千鳥状に配置されている。なお、メインラグ１５の端部には周方向（回転方向前方）に向かって突出した突出部１７が形成されているが、補助ラグ１６にはこのような突出部は形成されていない。メインラグ１５と回転方向前方で隣接する補助ラグ１６とを１ブロックとすると、当該メインラグ１５及び補助ラグ１６は、当該１ブロックが、周方向に等ピッチで千鳥状となるように配置されており、周方向でクローラ本体７の剛性差が生じないようになっている。したがって、第１実施形態と同様に、転輪５の上下動が低減されてクローラ走行装置２の振動が抑制される。 FIG. 4 shows a second embodiment according to the present invention. The main difference between the present embodiment and the first embodiment is that the main lug 15 is formed in such a length that it does not exceed the central portion in the width direction of the crawler body 7, and the auxiliary lug 15 is disposed between the main lugs 15. The shape of the lug 16 is different from the auxiliary lug 11 of the first embodiment. The left and right main lugs 15 are arranged in a staggered manner at an equal pitch, and the auxiliary lugs 16 between adjacent main lugs 15 are similarly arranged in a staggered manner at an equal pitch. In addition, although the protrusion part 17 which protruded toward the circumferential direction (rotation direction front) is formed in the edge part of the main lug 15, such a protrusion part is not formed in the auxiliary | assistant lug 16. FIG. Assuming that the main lug 15 and the auxiliary lug 16 adjacent to the front in the rotation direction are one block, the main lug 15 and the auxiliary lug 16 are arranged so that the one block is staggered at an equal pitch in the circumferential direction. A difference in rigidity of the crawler body 7 does not occur in the circumferential direction. Therefore, similarly to the first embodiment, the vertical movement of the wheel 5 is reduced and the vibration of the crawler traveling device 2 is suppressed.

図５は、本発明に係る第３実施形態を示している。本実施形態が上記第１実施形態と異なる主な点は、メインラグ１８と補助ラグ１９の各端部に形成された突出部２０、２１が、周方向で互いに向き合うようにして設けられている点である。すなわち、メインラグ１８の突出部２０は、その端部から回転方向前方に向いて突出しており、補助ラグ１９の突出部２１は、その端部からラ回転方向後方に向いて突出している。また、当該メインラグ１８と補助ラグ１９との対向壁面１８ａ、１９ａが、クローラ本体７の幅方向外側に向かうに従って広がっている。すなわち、補助ラグ１９の一端部（クローラ本体の幅方向外側）の壁面１９ａからメインラグ１８の壁面１８ａまでの周方向距離Ｌ１が、補助ラグ１９の他端部に形成された突出部２１の根本部壁面１９ａからメインラグ１８の壁面１８ａまでの周方向距離Ｌ２よりも長くなっている。これにより、メインラグ１８と補助ラグ１９との間に入った泥土が排出され易くなることから、高い排土性を得ることができる。 FIG. 5 shows a third embodiment according to the present invention. The main difference between this embodiment and the first embodiment is that the protrusions 20 and 21 formed at the ends of the main lug 18 and the auxiliary lug 19 are provided so as to face each other in the circumferential direction. It is. That is, the protrusion 20 of the main lug 18 protrudes from the end toward the front in the rotation direction, and the protrusion 21 of the auxiliary lug 19 protrudes from the end toward the rear in the direction of rotation. Further, opposing wall surfaces 18 a and 19 a of the main lug 18 and the auxiliary lug 19 are widened toward the outer side in the width direction of the crawler body 7. That is, the circumferential distance L1 from the wall surface 19a of one end portion of the auxiliary lug 19 (the width direction outer side of the crawler body) to the wall surface 18a of the main lug 18 is the root portion of the protruding portion 21 formed at the other end portion of the auxiliary lug 19. The circumferential distance L2 from the wall surface 19a to the wall surface 18a of the main lug 18 is longer. Thereby, since the mud which entered between the main lug 18 and the auxiliary lug 19 becomes easy to be discharged | emitted, high soil removal property can be obtained.

なお、上記各実施形態に限定するものではなく、例えばラグを図６に示すような配置で設けてもよい。図６に示す弾性クローラ１では、クローラ本体７の内周面７ｂを転動する転輪５の転輪接地領域Ｔがクローラ本体７の片方（図６の左側：クローラ走行装置２の内側あるいは外側）に寄っており、メインラグ２２及び補助ラグ２３が、この転輪接地領域Ｔに対応するように配置されている。なお、当該転輪５は、クローラ本体７の内周面７ｂの幅方向片側に寄ったところに設けられた駆動突起部６を跨ぐように構成されたものである。また、メインラグ２２は、クローラ本体７の幅方向の一端部の近傍から他端部の近傍に亘って形成された大ラグ２２Ａと、周方向で前記大ラグ２２Ａ間に配置されかつ前記一端部の近傍からクローラ本体中央部を少し越えるところまで形成された小ラグ２２Ｂとからなっている。 In addition, it is not limited to said each embodiment, For example, you may provide a lug by arrangement | positioning as shown in FIG. In the elastic crawler 1 shown in FIG. 6, the roller contact area T of the roller 5 that rolls on the inner peripheral surface 7 b of the crawler body 7 is one side of the crawler body 7 (left side in FIG. 6: inside or outside of the crawler travel device 2). The main lug 22 and the auxiliary lug 23 are arranged so as to correspond to the wheel contact area T. The roller 5 is configured so as to straddle the driving protrusion 6 provided at a position close to one side in the width direction of the inner peripheral surface 7b of the crawler body 7. The main lug 22 is disposed between the large lug 22A formed from the vicinity of one end in the width direction of the crawler main body 7 to the vicinity of the other end, and the large lug 22A in the circumferential direction and It consists of a small lug 22B formed from the vicinity to a place slightly beyond the center of the crawler body.

そして、これら大、小ラグ２２Ａ、２２Ｂは、千鳥状に配置されており、ともにクローラ本体７の外側に向かうに従って回転方向後方に傾斜している。これら大、小ラグ２２Ａ、２２Ｂは、それぞれその端部に周方向（回転方向前方）に向かう突出部２４、２５を有している。大ラグ２２Ａと小ラグ２２Ｂとの間の補助ラグ２３は、クローラ本体７の幅方向中央部に配置された第１補助ラグ２３Ａと、クローラ本体７の縁部に配置された第２ラグ２３Ｂとからなっている。このうち、第１補助ラグ２３Ａは、その長手方向中央部から両端部に向かうに従って窄まっており、第２補助ラグ２３Ｂは、その長手方向中央部からクローラ本体７の幅方向におけるクローラ本体７の中央部側へ向かうに従って窄まり、かつ同中央部からクローラ本体７の縁部側へ直線的に延びている。また第１、第２補助ラグ２３Ａ、２３Ｂは、それぞれ周方向に等ピッチで配置されている。そして、ラグ群Ｒは、図６に示すように大ラグ２２Ａ、第２補助ラグ２３Ｂ、小ラグ２２Ｂ、第１補助ラグ２３Ａ、・・という順番で配置されており、クローラ本体７の周方向における剛性差をなくしている。これにより、転輪５が通過する際の当該転輪５の上下動が低減されることから、本実施形態のような転輪５配置とした場合であっても、クローラ走行装置２の振動を効果的に抑制することができる。 The large and small lugs 22 A and 22 B are arranged in a zigzag shape, and both incline backward in the rotation direction toward the outside of the crawler body 7. Each of the large and small lugs 22A and 22B has protrusions 24 and 25 that extend in the circumferential direction (forward in the rotational direction) at their ends. The auxiliary lug 23 between the large lug 22 A and the small lug 22 B includes a first auxiliary lug 23 A disposed at the center in the width direction of the crawler main body 7, and a second lug 23 B disposed at the edge of the crawler main body 7. It is made up of. Among these, the first auxiliary lug 23A is narrowed from the central portion in the longitudinal direction toward both ends, and the second auxiliary lug 23B is in the width direction of the crawler main body 7 from the central portion in the longitudinal direction. It narrows as it goes to the center side, and extends linearly from the center to the edge of the crawler body 7. The first and second auxiliary lugs 23A and 23B are arranged at equal pitches in the circumferential direction. The lug group R is arranged in the order of the large lug 22A, the second auxiliary lug 23B, the small lug 22B, the first auxiliary lug 23A, as shown in FIG. The rigidity difference is eliminated. Accordingly, since the vertical movement of the wheel 5 when the wheel 5 passes is reduced, even when the wheel 5 is arranged as in the present embodiment, the crawler traveling device 2 is vibrated. It can be effectively suppressed.

また、例えば上記各実施形態のメインラグ及び補助ラグが、転輪接地領域と重なり合い、かつ、転輪接地領域で周方向に連続するように（隙間のないように）配置された弾性クローラとすれば、メインラグ及び補助ラグが、転輪接地領域において転輪を支承し続けることができる。これにより、転輪の下方への落ち込みが極めて少なくなり、クローラ走行装置の振動を極めて効果的に抑制することができる。なお、メインラグ、補助ラグの形状、配置は、上記各実施形態に限定するものではない。さらに、例えば図７や図８に示すように、クローラ走行装置４０、５０は、駆動輪である上部中央に配置されたスプロケット４１、５１と、前後一対のアイドラ４２、５２と、このアイドラ４２，５２間に列設された複数の転輪４３，５３との外周に上記弾性クローラ１を巻き掛けることによって構成してもよい。 In addition, for example, if the main lug and the auxiliary lug of each of the above embodiments are elastic crawlers arranged so as to overlap the wheel contact area and be continuous in the circumferential direction in the wheel contact area (no gap). The main lug and the auxiliary lug can continue to support the wheel in the wheel contact area. Thereby, the downward fall of a roller wheel becomes very small, and the vibration of a crawler traveling apparatus can be suppressed very effectively. In addition, the shape and arrangement | positioning of a main lug and an auxiliary | assistant lug are not limited to said each embodiment. Further, for example, as shown in FIGS. 7 and 8, the crawler traveling devices 40 and 50 include sprockets 41 and 51 arranged at the upper center as drive wheels, a pair of front and rear idlers 42 and 52, and the idlers 42, The elastic crawler 1 may be wound around the outer periphery of the plurality of rollers 43 and 53 arranged in a row between the rollers 52 and 53.

第１実施形態の弾性クローラを接地側からみた平面図である。It is the top view which looked at the elastic crawler of a 1st embodiment from the grounding side. 同弾性クローラの幅方向断面図である。It is width direction sectional drawing of the elastic crawler. クローラ走行装置の側面図である。It is a side view of a crawler traveling device. 第２実施形態の弾性クローラを接地側からみた平面図である。It is the top view which looked at the elastic crawler of 2nd Embodiment from the grounding side. 第３実施形態の弾性クローラを接地側からみた平面図である。It is the top view which looked at the elastic crawler of 3rd Embodiment from the earthing | grounding side. 他の実施形態の弾性クローラを接地側からみた平面図である。It is the top view which looked at the elastic crawler of other embodiment from the earthing | grounding side. 他のクローラ走行装置の側面図である。It is a side view of another crawler traveling device. 他のクローラ走行装置の側面図である。It is a side view of another crawler traveling device. （ａ）、（ｂ）、（ｃ）は、それぞれ従来の弾性クローラを接地側からみた平面図である。(A), (b), (c) is the top view which looked at the conventional elastic crawler from the grounding side, respectively.

符号の説明Explanation of symbols

１弾性クローラ
５転輪
６駆動突起
７クローラ本体
１０メインラグ
１１補助ラグ
１２突出部
Ｔ転輪接地領域
Ｘ回転方向 DESCRIPTION OF SYMBOLS 1 Elastic crawler 5 Rolling wheel 6 Drive protrusion 7 Crawler main body 10 Main lug 11 Auxiliary lug 12 Projection part T Rolling wheel grounding area X Rotation direction

Claims

周方向において一定間隔おきに並ぶ複数の駆動突起が内周面に形成されたクローラ本体と、このクローラ本体の外周面に所定のラグパターンで形成されたラグ群と、前記クローラ本体の内部に周方向に沿って埋設された抗張体と、を備えている弾性クローラにおいて、前記ラグ群は、次の（ａ）で定義される複数のメインラグと、（ｂ）で定義される複数の補助ラグとから構成され、これらメインラグと補助ラグとが、クローラ本体の周期的な剛性差が生じないように周方向で交互に配置されていることを特徴とする弾性クローラ。
（ａ）周方向において所定間隔おきに千鳥状に配置されたメインラグ
（ｂ）周方向で隣接する前記メインラグ間において、転輪接地領域の幅方向中央部の左右両側に配置され、周方向で互いにずれた状態で配置された補助ラグ A crawler body in which a plurality of drive protrusions arranged at regular intervals in the circumferential direction are formed on the inner peripheral surface, a lug group formed in a predetermined lug pattern on the outer peripheral surface of the crawler main body, and a cylinder inside the crawler main body. In the elastic crawler provided with a tensile body embedded along the direction, the lug group includes a plurality of main lugs defined in (a) below and a plurality of auxiliary lugs defined in (b) An elastic crawler characterized in that the main lug and the auxiliary lug are alternately arranged in the circumferential direction so as not to cause a periodic rigidity difference of the crawler body.
(A) Main lugs arranged in a staggered manner at predetermined intervals in the circumferential direction (b) Between the main lugs adjacent in the circumferential direction, they are arranged on the left and right sides of the center in the width direction of the wheel contact area, and are mutually in the circumferential direction. Auxiliary lugs placed out of position

前記メインラグ及び前記補助ラグのうち少なくとも一方が、前記クローラ本体の幅方向外側に向かうに従ってクローラ回転方向後方に傾斜している請求項１に記載の弾性クローラ。 The elastic crawler according to claim 1, wherein at least one of the main lug and the auxiliary lug is inclined rearward in the crawler rotation direction toward the outer side in the width direction of the crawler body.

前記メインラグと前記補助ラグとは、異なる角度で傾斜している請求項２に記載の弾性クローラ。 The elastic crawler according to claim 2, wherein the main lug and the auxiliary lug are inclined at different angles.

前記メインラグが、前記駆動突起の形成領域を前記クローラ本体の幅方向で跨ぐように配置されている請求項１〜３に記載の弾性クローラ。 The elastic crawler according to claim 1, wherein the main lug is disposed so as to straddle a region where the driving protrusion is formed in a width direction of the crawler body.

前記メインラグが、前記転輪接地領域と重なり合うように配置されている請求項１〜４のいずれかに記載の弾性クローラ。 The elastic crawler according to any one of claims 1 to 4, wherein the main lug is disposed so as to overlap the wheel contact area.

前記メインラグが、隣接する前記補助ラグと前記クローラ本体の幅方向で重なり合うように配置されている請求項１〜５のいずれかに記載の弾性クローラ。 The elastic crawler according to claim 1, wherein the main lug is disposed so as to overlap with the adjacent auxiliary lug in the width direction of the crawler body.

前記メインラグが、隣接する他のメインラグと前記クローラ本体の幅方向中央部近傍において周方向で重なり合うように配置されている請求項１〜６のいずれかに記載の弾性クローラ。 The elastic crawler according to any one of claims 1 to 6, wherein the main lug is disposed so as to overlap with another adjacent main lug in the circumferential direction in the vicinity of the central portion in the width direction of the crawler body.

前記メインラグ及び前記補助ラグのうち少なくとも一方が、周方向に向かって延設された突出部を有するとともに、周方向で隣接するメインラグと補助ラグとの対向壁面間が、前記クローラ本体の幅方向外側に向かうに従って広がっている請求項１〜７のいずれかに記載の弾性クローラ。 At least one of the main lug and the auxiliary lug has a protruding portion extending in the circumferential direction, and the space between the opposing wall surfaces of the main lug and the auxiliary lug adjacent in the circumferential direction is the outer side in the width direction of the crawler body. The elastic crawler according to any one of claims 1 to 7, wherein the elastic crawler spreads toward the head.

前記メインラグ及び前記補助ラグが、前記転輪接地領域と重なり合い、かつ、当該転輪接地領域で周方向に連続するように配置されている請求項１〜８のいずれかに記載の弾性クローラ。 The elastic crawler according to any one of claims 1 to 8, wherein the main lug and the auxiliary lug are arranged so as to overlap with the wheel contact area and to be continuous in the circumferential direction in the wheel contact area.