WO2019097923A1 - Rubber crawler-track pad - Google Patents

Rubber crawler-track pad Download PDF

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Publication number
WO2019097923A1
WO2019097923A1 PCT/JP2018/038340 JP2018038340W WO2019097923A1 WO 2019097923 A1 WO2019097923 A1 WO 2019097923A1 JP 2018038340 W JP2018038340 W JP 2018038340W WO 2019097923 A1 WO2019097923 A1 WO 2019097923A1
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WO
WIPO (PCT)
Prior art keywords
crawler
passing surface
wheel
main body
area
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PCT/JP2018/038340
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French (fr)
Japanese (ja)
Inventor
穣 安孫子
Original Assignee
株式会社ブリヂストン
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Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Publication of WO2019097923A1 publication Critical patent/WO2019097923A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
    • B62D55/253—Tracks of continuously flexible type, e.g. rubber belts having elements interconnected by one or more cables or like elements

Definitions

  • the present invention relates to a rubber crawler, and more particularly to a rubber crawler having a roller wheel passing surface on the inner peripheral surface of a crawler body.
  • the rubber crawler is an endless track made of rubber, and has been actively researched and developed since it was first developed as a component for agricultural equipment, and is now widely used and expanded in various applications, and its configuration and type It is diverse.
  • FIG. 7 illustrates an example of the rubber crawler
  • FIG. 7 (a) is a plan view of the inner peripheral surface 54 of the crawler main body of the rubber crawler 46
  • FIG. 7 (b) is an A- of FIG. It is A sectional drawing.
  • FIG. 7 only a half of the rubber crawler 46 in the width direction of the crawler body is shown at the portion where the core metal 48 is embedded.
  • core bars 48 are embedded in the circumferential direction at predetermined intervals, and each of the core bars 52 is provided with a guide projection 50 for guiding a rolling wheel.
  • the metal core 52 has a substantially rectangular shape in a plan view, but as shown in the cross-sectional view of FIG. 7B, the guide projection 50 is located above the inner peripheral surface side of the crawler body near the center in the width direction.
  • a lug 58 is provided protrudingly provided on the outer peripheral surface side of the crawler main body for traveling on a farmland, a construction site or the like.
  • a wheel passing surface 52 through which the rollers pass is continuously formed in the circumferential direction of the crawler body so as to have a predetermined width.
  • the width of the wheel passing surface 52 is set wider than the width of the normal wheel.
  • FIG. 8 is a cross-sectional view taken along the line B-B in FIG.
  • the wheel passing surface 52 and the contact surface of the lug 58 are substantially parallel.
  • the roller 26 sinks into the roller passing surface 52 due to the vehicle load as described above, but when the roller 26 sinks, the roller 26 is rotated.
  • a scratch is formed by the edge of the wheel. The occurrence of the scratch may occur in the presence or absence of the core 48. Since the life of the rubber crawler 46 is shortened when the wheel passing surface 52 is damaged by the edge of the wheel 26, the prevention of the generation of the wound has been desired.
  • the present invention has been made in view of the above problems, and an object of the present invention is to prevent partial damage such as worming without causing edge damage due to the rolling wheel on the rolling wheel passing surface of the rubber crawler. It is to provide a rubber crawler that can
  • the rubber crawler according to claim 1 is Rubber having an endless belt-like crawler main body, lugs formed protruding from the outer peripheral surface of the crawler main body at a predetermined interval, and a wheel passing surface through which a roller provided on the inner peripheral surface of the crawler main body passes In the crawler,
  • the rolling wheel passage surface is provided with a notch at the widthwise outer end edge of the crawler wheel passing surface of the rolling wheel passage surface such that the width of the rolling wheel passage surface is smaller than the width of the rolling wheel.
  • the plurality of notches are provided at predetermined intervals in the circumferential direction of the crawler main body.
  • a plurality of areas having a width smaller than the width of the rolling wheel exist in the circumferential direction due to the formation of the notches in the rolling wheel passage surface. Therefore, when the rolling wheel passes through the rolling wheel passing surface, the rolling of the rolling wheel lowers due to the vehicle body load and the rolling wheel passing surface deforms, but there is a notch, so rolling by rolling of the rolling wheel The deformation of the wheel passage is also absorbed in the space of the recess. Therefore, it is possible to prevent the formation of continuous edge flaws on the surface of the wheel passing surface, and to alleviate the occurrence of edge flaws in the portion where the notch is not formed.
  • the rubber crawler according to claim 2 is the rubber crawler according to claim 1.
  • a core metal is embedded in the crawler main body at predetermined intervals in the circumferential direction of the crawler main body so that right and left wings of the core metal extend in the width direction of the crawler main body,
  • the present invention is characterized in that the inner peripheral surface of the region where the core metal does not exist in the thickness direction of the crawler main body.
  • the core metal embedded area and the installation area of the notch do not overlap. Due to the presence of the core, the pressing force by the rolling wheel is increased at that portion, but the rolling wheel passing surface of the embedded area of the core is not smaller than the width of the rolling wheel, so the per unit area of that portion An increase in pressure can be avoided and partial damage such as so-called worming can be avoided. Therefore, while protecting the wheel passing surface of the embedded area of the core metal portion, protection by permitting or absorbing the deformation of the wheel passing surface by the notch portion is achieved.
  • the embedded area of the core metal and the installation area of the notch portion are sufficient if they do not substantially overlap, and the function of the present invention can be exhibited even if there is an overlapped area.
  • the rubber crawler according to claim 3 is the rubber crawler according to claim 2.
  • the formation area of the notched portion is the area of the inner peripheral surface opposite to the area where the lugs are present, and the area where the wheel passing surface is present, the contact surface area of the core metal and the lugs And H. are arranged so as not to overlap in the thickness direction.
  • the notch is provided to overlap with the formation region of the lug, and the contact surface of the lug does not exist in the region in the thickness direction where the core metal is present.
  • the rolling wheel passing surface where the notch portion is present has a lug on the opposite side, and the contact surface of the lug and the core metal do not overlap Therefore, the deformation of the roller passing surface due to the pressing force of the rollers and the lugs occurs uniformly because there is no core metal in the thickness direction.
  • the contact surface area of the core metal and the lug is sufficient if it does not substantially overlap in the area in the thickness direction of the wheel passing surface, and the function of the present invention can be exhibited even if there is an overlapping area. It is.
  • the rubber crawler according to claim 4 is the rubber crawler according to claim 3.
  • the lug extends at an angle with respect to a direction orthogonal to the circumferential direction of the crawler body, and one end portion of the lug is a region where the roller passing surface in which the notch portion is formed is present and the thickness is The overlapping area in the longitudinal direction and the other end are formed on the outer peripheral surface of the overlapping area in the thickness direction with the installation area of one end of the core metal adjacent in the circumferential direction of the crawler body.
  • This configuration corresponds to a rubber crawler that enhances the grip of the lug like a rubber crawler or the like when traveling on a hard ground, and the lug is inclined with respect to the direction orthogonal to the circumferential direction of the crawler body. And one end of the lug is formed in the area where the notch is formed, and the other end is formed in the area of one end of the adjacent core metal.
  • the rubber crawler according to claim 5 is the rubber crawler according to claim 4. Between the other ends of the lugs adjacent in the circumferential direction of the crawler body, the outer peripheral surface of the crawler body in the area where the core metal does not exist extends in the width direction to the edge of the crawler body A recess is formed.
  • the end of the lug is in the area where the notch is formed, and the other end is the area of the end of the metal core adjacent to one another.
  • Increase in the bending stiffness of the rubber crawler caused by the presence of That is, in the region of the widthwise end of the cored bar, since the recess extending in the widthwise direction to the edge of the crawler main body is formed on the outer peripheral surface of the crawler main body between the cored bars, the bending rigidity can be reduced.
  • the recess is a portion where a member constituting the crawler main body is lightened. Therefore, it is possible to reduce the bending rigidity of the rubber crawler requiring the grip of a strong lug while suppressing the occurrence of rolling wheel edge flaws.
  • a plurality of notches for reducing the width of the rolling wheel passing surface than the width of the rolling wheel are provided at a predetermined location, so the configuration of the rolling wheel passing surface by the pressing force when passing the rolling wheel. The deformation of the member is allowed to be absorbed in the space of the notch and the occurrence of the edge flaw of the rolling wheel is effectively prevented.
  • FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 according to the first embodiment of the rubber crawler of the present invention. It concerns on 2nd embodiment of the rubber crawler of this invention, and is a top view of the internal peripheral surface of a crawler main body. It concerns on 2nd Embodiment of the rubber crawler of this invention, and is a top view of the outer peripheral surface of a crawler main body.
  • FIG. 7 (b) is a cross-sectional view taken along a line BB in FIG. 7 (b), showing a time when a roller is passed, according to a conventional rubber crawler.
  • the first embodiment shows a case where the present invention is applied to a rubber crawler requiring a grip force such as traveling on a hard ground.
  • FIG. 1 is a plan view of the inner peripheral surface of the rubber crawler
  • FIG. 2 is a plan view of the outer peripheral surface of the rubber crawler shown in FIG.
  • FIG. 3 is a cross-sectional view taken along line AA of FIG.
  • the core metal 12 is embedded in the crawler main body at equal intervals in the circumferential direction.
  • the cored bar 12 has right and left wing portions in the width direction of the crawler body, and in the center portion, there are formed rolling wheel guiding projections 14 projecting to the inner peripheral surface side of the crawler body. .
  • a wheel passing surface 16 through which the wheel passes is formed on both outer sides in the width direction of the crawler body of the wheel guiding projection portion 14.
  • the rolling wheel passing surface 16 is continuously formed in the circumferential direction of the crawler body, but as shown in the drawing, a notch is formed in the width direction outer edge of the crawler body in a portion where the core 12 is not directly below In the area where the notch 24 is provided, the width of the wheel passing surface 16 is smaller than that of the wheel. That is, there are a plurality of regions in the circumferential direction of the crawler body on the rolling wheel passage surface 16 whose width is smaller than the width of the rolling wheels.
  • the shape of the notch 24 is substantially semicircular in plan view, but the shape is not limited to this as long as the width of the wheel passing surface 16 is reduced.
  • the width and pattern of the lugs 22 can be appropriately determined according to the application, and the rubber crawler of this embodiment has a width of the ground surface 22a as shown in FIG. 2 in order to enhance the grip of the lugs. It is set wider than usual, and extends obliquely with respect to the direction orthogonal to the circumferential direction of the crawler body. Further, one end of the lug 22 is formed in a region where the wheel passing surface 16 exists in the thickness direction of the outer peripheral surface of the crawler body, and the other end is a cored bar 12 adjacent in the thickness direction. It is formed in the existing area.
  • a notched portion 24 is provided on the roller passing surface 16 on the inner peripheral surface side of one end of the lug 22. That is, the lugs 22 are present in the thickness direction in the region where the notches 24 of the wheel passing surface 16 are formed, and in the region where the wheel passing surface 16 is present, the core 12 and the contact surface 22a of the lug 22 are substantially It does not overlap. In addition, it is possible to achieve the effect of the present embodiment to be described later, even if a part of the overlap is generated in the avoidance of the overlap. For example, in half or more of the width direction of the region where the wheel passing surface 16 exists, it is preferable that the contact surface 22a of the lug and the core metal 12 do not overlap in the thickness direction.
  • the rolling wheel passing surface 16 sinks downward due to the vehicle body load, and the rolling wheel passing surface 16 is deformed, but the notch portion 24 is present.
  • the deformation of the wheel passing surface 16 due to the sinking of the gear is allowed to be absorbed in the space of the notch 24. Therefore, continuous edge flaws are prevented from being formed on the surface of the wheel passing surface 16.
  • the occurrence of edge flaws in the portion where the notch 24 is not formed is also alleviated.
  • the wheel passing surface 16 in the region in which the core metal 12 is present is not smaller than the width of the rolling wheel, in the roller passing surface 16 between the rolling wheel and the core metal 12, the pressure per unit area is reduced. An increase in pressure is avoided. Therefore, partial damage such as so-called worming can also be avoided. As a result, while protecting the wheel passing surface of the embedded region of the portion of the cored bar 12, protection by absorbing the deformation of the wheel passing surface 16 by the notches 24 is achieved.
  • protection of the members on the metal core 12 is achieved while achieving the absorption of deformation of the members of the wheel passing surface 16 by the notches 24.
  • the pressing force applied is the crawler body because the contact surface 22a of the lug 22 does not exist immediately below. In the circumferential direction, adjacent lugs 22 are dispersed in the diagonal direction, and concentration of pressure is avoided.
  • one end of the lug 22 is formed on the outer peripheral surface side of the region where the wheel passing surface 16 exists, and the other end is the widthwise end of the adjacent core metal 12 Extends to the outer peripheral surface of the region of In such a configuration, there is a concern that the bending stiffness of the rubber crawler is increased.
  • the outer peripheral surface of the crawler main body between the core metal By forming the recess 28 extending in the width direction to the edge, the bending rigidity can be reduced.
  • the recess 28 is a portion where a member constituting the crawler body is lightened. Therefore, it is possible to reduce the bending rigidity of the rubber crawler requiring the grip of a strong lug while suppressing the occurrence of rolling wheel edge flaws, and it was possible to suppress the occurrence of vibration and to improve ride comfort and fuel consumption.
  • the rubber crawler of the first embodiment of the present invention in the case where a grip force of traveling on a hard ground is required, a lug structure between core bars is adopted, and a wheel passing surface where the core bar 12 does not exist directly below Since the notches 24 are formed at the outer side edge in the width direction at 16, deformation of members constituting the wheel passing surface 16 due to the pressing force when passing through the rollers is absorbed in the space of the notches 24. And the occurrence of edge flaws on the rolling wheels is effectively prevented. In addition, an increase in pressing force per unit area on the wheel passing surface between the wheel and the core metal 12 can be prevented, and partial damage such as so-called worming can be avoided. This can extend the life of the rubber crawler.
  • the configuration in which the notched portion 24 and the core metal 12 do not overlap, and the configuration in which the core metal 12 and the contact surface 22a of the lug do not overlap do not mean complete non-overlapping.
  • the effects of each of the above-described embodiments can be achieved even if the overlap occurs in part.
  • FIG. 4 is a plan view of the inner peripheral surface of the rubber crawler
  • FIG. 5 is a plan view of the outer peripheral surface of the rubber crawler shown in FIG. 6 is a cross-sectional view taken along the line AA of FIG.
  • the core metal embedded area and the installation area of the notch do not overlap, and the cutout is the area where the lug is formed. It is the same that overlapping, in the rolling wheel passage plane, the contact areas of the core metal and the lug do not overlap. However, the size of the cored bar, and the size and shape of the lugs protrudingly formed on the outer peripheral surface side of the crawler main body are different.
  • the cored bar 32 is narrow in width and short in length of the wings extending in the width direction of the crawler body, as compared with those for rubber crawlers that require a gripping force to travel on a hard ground.
  • the lugs include a long lug 42a and a short lug 42b.
  • the short lugs 42b are slightly inclined in the direction orthogonal to the circumferential direction of the crawler body, and are formed on the outer peripheral surface side of the region where the wheel passing surface 36 exists.
  • the long lugs 42a extend on the outer peripheral surface side of the region where the wheel passing surface 36 exists substantially in parallel with the short lugs 42b, and then extend to the end of the crawler main body in the direction parallel to the circumferential direction. doing.
  • the short lugs 42b are about half the length of the long lugs 42a, and the long lugs 42a and the short lugs 42b are alternately provided in the circumferential direction of the crawler body. Further, the width of the ground contact surface 42c of the lugs 42a and 42b is narrower than that of a grip requiring traveling on a hard ground, and the outer circumferential surface 40 of the crawler main body is provided with a recess as described in the first embodiment. It is not done.
  • the notched portion 44 is formed on the wheel passing surface 36 which has no core metal 32 directly below and has lugs 42a and 42b directly below, similar to a rubber crawler requiring grip power to travel on a hard ground. As compared with the notches 24 of the rubber crawler of FIG. Moreover, although the shape of the notch part 44 is substantially semicircular shape in planar view, if the width
  • the vehicle travels the hard ground of the first embodiment. It is possible to obtain the same operation and effect as described for the rubber crawler requiring a gripping force.
  • the rolling wheel passing surface 36 sinks downward due to the vehicle body load and the rolling wheel passing surface 36 is deformed, but the notch portion 44 exists.
  • the deformation of the wheel passing surface 36 due to the sinking of the gear is allowed to be absorbed in the space of the notch 44. Therefore, continuous edge flaws are prevented from being formed on the surface of the wheel passing surface 36.
  • the occurrence of edge flaws in the portion where the notch 44 is not formed is also alleviated.
  • the wheel passing surface 36 in the region where the core metal 32 is present is not smaller than the width of the rolling wheel, the wheel passing surface 36 between the rolling wheel and the core metal 32 has a pressure per unit area An increase in pressure is avoided. Therefore, partial damage such as so-called worming can also be avoided. As a result, while protecting the wheel passing surface of the embedded region of the portion of the cored bar 32, protection by permitting or absorbing the deformation of the wheel passing surface 36 by the notch portion 44 is achieved.
  • protection of the members on the cored bar 32 is achieved while achieving the absorption of deformation of the members constituting the wheel passing surface 36 by the notches 44.
  • the pressing force is It disperses in the diagonal direction in which the adjacent lugs 42a and 42b exist in the circumferential direction of the crawler body, and concentration of pressure is avoided.
  • the core metal 32 has a small width in the circumferential direction of the crawler body and a small length of the wings extending in the width direction, the weight of the rubber crawler 30 can be reduced, and the core metal 32 and lugs Since there is no overlap in the thickness direction of the contact surfaces 42a and 42b with the contact surface 42c, the bending rigidity of the crawler body can be reduced.
  • the rubber crawler of the second embodiment of the present invention in the case of traveling on a relatively soft ground such as rice straw, a lug structure between the core bars is adopted, and the rolling wheel without the core bar 32 directly below Since the notch 44 is formed in the widthwise outer end edge of the passage surface 36, the deformation of the member constituting the roller passage surface 36 due to the pressing force at the time of passing the rollers is the space of the notch 44. Permissible absorption, and the occurrence of the edge flaws of the rolling wheels can be effectively prevented. In addition, an increase in pressing force per unit area on the wheel passing surface between the wheel and the core metal 32 can be prevented, and partial damage such as so-called worming can be avoided. This can extend the life of the rubber crawler.
  • the configuration in which the notched portion 44 and the core metal 32 do not overlap, and the configuration in which the core metal 32 and the contact surface 42c of the lug do not overlap do not mean complete non-overlapping.
  • the effects of each of the above-described embodiments can be achieved even if the overlap occurs in part.
  • the rubber crawler is shown when traveling on a hard ground and when traveling on a soft ground, but is not limited thereto.
  • the shape of the notch may be another shape as long as it reduces the width of the wheel passing surface.
  • the notch may be triangular, rectangular or trapezoidal. In particular, if it is configured in a curvilinear shape, it is more preferable that cracking is less likely to occur than in the case of a rectangle or the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
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Abstract

[Problem] To provide a rubber crawler-track pad where no damage is caused to the edge of the track-roller-passing surface thereof by a track roller and partial damage such as nibbling to the track-roller-passing surface can be avoided. [Solution] The rubber crawler-track pad according to the present invention includes an endless belt-shaped crawler-track pad main body, lugs protrudingly formed on the outer peripheral surface of the crawler-track pad main body at predetermined intervals, and a track-roller-passing surface 16 which is provided on the inner peripheral surface of the crawler-track pad main body and on which a track roller passes. The rubber crawler-track pad is characterized in that the track-roller-passing surface 16 is provided with cutout parts 24 on the outer edges thereof widthwise of the crawler-track pad main body so as to make the width of the track-roller-passing surface smaller than the width of the track roller and in that the cutout parts 24 are provided in plurality at predetermined intervals circumferentially of the crawler-track pad main body.

Description

ゴムクローラRubber crawler
　本発明は、ゴムクローラ、特にクローラ本体の内周面に転輪通過面を有するゴムクローラに関する。 The present invention relates to a rubber crawler, and more particularly to a rubber crawler having a roller wheel passing surface on the inner peripheral surface of a crawler body.
　ゴムクローラはゴム製の無限軌道帯であり、最初に農業機器の足廻り部品として開発されて以来、活発な研究・開発が行われ、現在では様々の用途に普及拡大し、その構成・種類も多岐に亘っている。 The rubber crawler is an endless track made of rubber, and has been actively researched and developed since it was first developed as a component for agricultural equipment, and is now widely used and expanded in various applications, and its configuration and type It is diverse.
　図７は、ゴムクローラの一例について説明したものであり、同図（ａ）はゴムクローラ４６のクローラ本体の内周面５４の平面図、同図（ｂ）は同図（ａ）のＡ－Ａ断面図である。但し、図７では、ゴムクローラ４６は、芯金４８が埋設されている部分についてクローラ本体の幅方向に半分だけ示されている。このゴムクローラ４６には、芯金４８が周方向に所定の間隔で並べられて埋設されており、それぞれの芯金５２には転輪を案内する案内用突起部５０が設けられている。 FIG. 7 illustrates an example of the rubber crawler, and FIG. 7 (a) is a plan view of the inner peripheral surface 54 of the crawler main body of the rubber crawler 46, and FIG. 7 (b) is an A- of FIG. It is A sectional drawing. However, in FIG. 7, only a half of the rubber crawler 46 in the width direction of the crawler body is shown at the portion where the core metal 48 is embedded. In the rubber crawler 46, core bars 48 are embedded in the circumferential direction at predetermined intervals, and each of the core bars 52 is provided with a guide projection 50 for guiding a rolling wheel.
　芯金５２は平面視で略長方形状であるが、図７（ｂ）の断面図に示した様に幅方向の中央部付近に案内用突起部５０がクローラ本体の内周面側の上方に突設して設けられ、クローラ本体の外周面側には、農地や建設現場等を走行するためのラグ５８が突出形成されている。 The metal core 52 has a substantially rectangular shape in a plan view, but as shown in the cross-sectional view of FIG. 7B, the guide projection 50 is located above the inner peripheral surface side of the crawler body near the center in the width direction. A lug 58 is provided protrudingly provided on the outer peripheral surface side of the crawler main body for traveling on a farmland, a construction site or the like.
　クローラ本体の内周面５４には、転輪が通過する転輪通過面５２が、所定幅を有するようにクローラ本体の周方向に連続に形成されている。ここで、転輪通過面５２の幅は、例えば特許文献１の図１に示される様に、通常転輪の幅よりも広く設定されている。 On the inner circumferential surface 54 of the crawler body, a wheel passing surface 52 through which the rollers pass is continuously formed in the circumferential direction of the crawler body so as to have a predetermined width. Here, as shown in, for example, FIG. 1 of Patent Document 1, the width of the wheel passing surface 52 is set wider than the width of the normal wheel.
　図８は、図７（ｂ）のＢ－Ｂ断面であって、転輪通過時の様子を示す。転輪通過面５２とラグ５８の接地面とは略並行である。転輪２６が芯金４８及び芯金４８の存在しない部分を通過する時は、図８に示すように、転輪２６は機体荷重により転輪通過面５２に沈み込む。 FIG. 8 is a cross-sectional view taken along the line B-B in FIG. The wheel passing surface 52 and the contact surface of the lug 58 are substantially parallel. When the wheel 26 passes through the portion where the core metal 48 and the core metal 48 do not exist, as shown in FIG. 8, the wheel 26 sinks into the wheel passing surface 52 due to the vehicle load.
特開２００５－２７１７１１号公報Japanese Patent Application Publication No. 2005-271711
　図７、図８で示したゴムクローラ４６においては、上述のように転輪２６は、機体荷重により転輪が転輪通過面５２に沈み込むが、転輪２６が沈み込むと、転輪２６のエッジにより、転輪通過面５２には傷が形成される。この傷の発生は、芯金４８の存在する部分でも存在しない部分でも起こり得る。転輪通過面５２に転輪２６のエッジによる傷が発生すると、ゴムクローラ４６の寿命が短くなるので、その傷の発生の防止が望まれていた。 In the rubber crawler 46 shown in FIG. 7 and FIG. 8, as described above, the roller 26 sinks into the roller passing surface 52 due to the vehicle load as described above, but when the roller 26 sinks, the roller 26 is rotated. In the roller passing surface 52, a scratch is formed by the edge of the wheel. The occurrence of the scratch may occur in the presence or absence of the core 48. Since the life of the rubber crawler 46 is shortened when the wheel passing surface 52 is damaged by the edge of the wheel 26, the prevention of the generation of the wound has been desired.
　一方で、転輪２６が沈み込まない様に転輪通過面５２の幅を全域に亘って転輪２６の幅より小さくすることが考えられるが、そうすると転輪２６の転輪通過面５２への押圧力が大きくなり、転輪２６と転輪通過面５２の間に挟み込まれた砂や小石が、押圧力により転輪通過面５２の表面に穴や亀裂等の不具合を形成するという、いわゆる虫食いの問題が発生する。 On the other hand, it is conceivable to make the width of the wheel passing surface 52 smaller than the width of the wheel 26 across the entire area so that the wheel 26 does not sink, but if doing so, the wheel 26 to the wheel passing surface 52 The so-called insect biting that the pressure increases and sand or pebbles sandwiched between the rolling wheel 26 and the wheel passing surface 52 form defects such as holes or cracks on the surface of the wheel passing surface 52 due to the pressing force. Problems occur.
　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、ゴムクローラの転輪通過面に転輪によるエッジ傷が発生せず、虫食いのような部分的な損傷も回避することのできるゴムクローラを提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to prevent partial damage such as worming without causing edge damage due to the rolling wheel on the rolling wheel passing surface of the rubber crawler. It is to provide a rubber crawler that can
　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は、
　無端帯状のクローラ本体と、該クローラ本体の外周面に所定の間隔で突出形成されたラグと、前記クローラ本体の内周面に設けられた転輪が通過する転輪通過面と、を有するゴムクローラにおいて、
　前記転輪通過面は、該転輪通過面の前記クローラ本体の幅方向外側端縁部に、該転輪通過面の幅が前記転輪の幅より小さくなるように切欠き部が設けられ、該切欠き部は前記クローラ本体の周方向に所定の間隔をおいて複数設けられたことを特徴とする。 In order to achieve the above object, the rubber crawler according to claim 1 is
Rubber having an endless belt-like crawler main body, lugs formed protruding from the outer peripheral surface of the crawler main body at a predetermined interval, and a wheel passing surface through which a roller provided on the inner peripheral surface of the crawler main body passes In the crawler,
The rolling wheel passage surface is provided with a notch at the widthwise outer end edge of the crawler wheel passing surface of the rolling wheel passage surface such that the width of the rolling wheel passage surface is smaller than the width of the rolling wheel. The plurality of notches are provided at predetermined intervals in the circumferential direction of the crawler main body.
　この構成により、転輪通過面には切欠き部が形成されたことにより転輪の幅より小さい幅の領域が周方向に複数存在する。したがって、転輪が転輪通過面を通過する際、機体荷重により転輪通過面下方側に沈み込み転輪通過面は変形するが、切欠き部が存在するので、転輪の沈み込みによる転輪通過面の変形は切欠き部の空間でも許容吸収される。したがって、転輪通過面の表面に連続的なエッジ傷が形成されることが防止されると共に、切欠き部の形成されていない部分のエッジ傷の発生も緩和される。 According to this configuration, a plurality of areas having a width smaller than the width of the rolling wheel exist in the circumferential direction due to the formation of the notches in the rolling wheel passage surface. Therefore, when the rolling wheel passes through the rolling wheel passing surface, the rolling of the rolling wheel lowers due to the vehicle body load and the rolling wheel passing surface deforms, but there is a notch, so rolling by rolling of the rolling wheel The deformation of the wheel passage is also absorbed in the space of the recess. Therefore, it is possible to prevent the formation of continuous edge flaws on the surface of the wheel passing surface, and to alleviate the occurrence of edge flaws in the portion where the notch is not formed.
　請求項２に記載のゴムクローラは、請求項１に記載のゴムクローラにおいて、
　前記クローラ本体には、芯金がその左右の両翼が該クローラ本体の幅方向に伸長するように該クローラ本体の周方向に所定の間隔を置いて埋設されており、前記切欠き部の形成領域は、前記クローラ本体の厚さ方向にて前記芯金の存在しない領域の前記内周面であることを特徴とする。 The rubber crawler according to claim 2 is the rubber crawler according to claim 1.
A core metal is embedded in the crawler main body at predetermined intervals in the circumferential direction of the crawler main body so that right and left wings of the core metal extend in the width direction of the crawler main body, The present invention is characterized in that the inner peripheral surface of the region where the core metal does not exist in the thickness direction of the crawler main body.
　この構成により、芯金の埋設領域と切欠き部の設置領域は重なっていない。芯金の存在により、転輪による押圧力はその部分で大きくなるが、芯金の埋設領域の転輪通過面は転輪の幅に対して小さくなっていないので、その部分の単位面積当たりの押圧力の増大が回避され、所謂虫食いのような部分的な損傷は回避することができる。したがって、芯金の部分の埋設領域の転輪通過面の保護を図りつつ、前記切欠き部による転輪通過面の変形の許容吸収による保護が達成されている。 With this configuration, the core metal embedded area and the installation area of the notch do not overlap. Due to the presence of the core, the pressing force by the rolling wheel is increased at that portion, but the rolling wheel passing surface of the embedded area of the core is not smaller than the width of the rolling wheel, so the per unit area of that portion An increase in pressure can be avoided and partial damage such as so-called worming can be avoided. Therefore, while protecting the wheel passing surface of the embedded area of the core metal portion, protection by permitting or absorbing the deformation of the wheel passing surface by the notch portion is achieved.
　また、芯金の埋設領域と切欠き部の設置領域は、ほぼ重なっていなければ足り、一部重なった領域が存在しても当該発明の作用を奏することが可能である。 Further, the embedded area of the core metal and the installation area of the notch portion are sufficient if they do not substantially overlap, and the function of the present invention can be exhibited even if there is an overlapped area.
　請求項３に記載のゴムクローラは、請求項２に記載のゴムクローラにおいて、
　前記切欠き部の形成領域は、前記ラグの存在する領域に対向する前記内周面の領域であり、且つ、前記転輪通過面の存在する領域では、前記芯金と前記ラグの接地面領域とが前記厚さ方向において重ならない配置とされたことを特徴とする。この構成では、転輪通過面において、切欠き部はラグの形成領域と重なって設けられており、且つ芯金が存在する厚さ方向の領域にはラグの接地面が存在していない。 The rubber crawler according to claim 3 is the rubber crawler according to claim 2.
The formation area of the notched portion is the area of the inner peripheral surface opposite to the area where the lugs are present, and the area where the wheel passing surface is present, the contact surface area of the core metal and the lugs And H. are arranged so as not to overlap in the thickness direction. In this configuration, in the roller passing surface, the notch is provided to overlap with the formation region of the lug, and the contact surface of the lug does not exist in the region in the thickness direction where the core metal is present.
　この構成により、転輪が転輪通過面を通過する際に、切欠き部の存在する転輪通過面は、対向する側にラグが存在し、且つラグの接地面と芯金とは重ならないので、転輪とラグの押圧力による転輪通過面の変形は、厚さ方向に芯金が存在しないので一様に生じる。 With this configuration, when the rolling wheel passes the rolling wheel passing surface, the rolling wheel passing surface where the notch portion is present has a lug on the opposite side, and the contact surface of the lug and the core metal do not overlap Therefore, the deformation of the roller passing surface due to the pressing force of the rollers and the lugs occurs uniformly because there is no core metal in the thickness direction.
　したがって、切欠き部による転輪通過面の変形吸収作用はより効果的なものとなる。 Therefore, the deformation absorbing action of the rolling wheel passage surface by the notch portion becomes more effective.
　また、芯金とラグの接地面領域は、転輪通過面の厚さ方向の領域において、ほぼ重なっていなければ足り、一部重なった領域が存在しても当該発明の作用を奏することが可能である。 Further, the contact surface area of the core metal and the lug is sufficient if it does not substantially overlap in the area in the thickness direction of the wheel passing surface, and the function of the present invention can be exhibited even if there is an overlapping area. It is.
　請求項４に記載のゴムクローラは、請求項３に記載のゴムクローラにおいて、
　前記ラグは、前記クローラ本体の周方向に直交する方向に対して傾斜して伸長しており、一方の端部は前記切欠き部が形成された前記転輪通過面の存在する領域と前記厚さ方向において重なる領域、他方の端部は前記クローラ本体の周方向で隣接する芯金の一方の端部の設置領域と前記厚さ方向で重なる領域の前記外周面に形成されたことを特徴とする。 The rubber crawler according to claim 4 is the rubber crawler according to claim 3.
The lug extends at an angle with respect to a direction orthogonal to the circumferential direction of the crawler body, and one end portion of the lug is a region where the roller passing surface in which the notch portion is formed is present and the thickness is The overlapping area in the longitudinal direction and the other end are formed on the outer peripheral surface of the overlapping area in the thickness direction with the installation area of one end of the core metal adjacent in the circumferential direction of the crawler body. Do.
　この構成は、硬い地面を走行するといった場合のゴムクローラ等のようにラグのグリップ力を強めたゴムクローラに対応させたもので、ラグは、クローラ本体の周方向に直交する方向に対して傾斜して伸長しており、ラグの一方の端部は切欠き部が形成された領域に、他方の端部は隣接する芯金の一方の端部の領域に形成されている。 This configuration corresponds to a rubber crawler that enhances the grip of the lug like a rubber crawler or the like when traveling on a hard ground, and the lug is inclined with respect to the direction orthogonal to the circumferential direction of the crawler body. And one end of the lug is formed in the area where the notch is formed, and the other end is formed in the area of one end of the adjacent core metal.
　そして、切欠き部と芯金の埋設領域とは重なっておらず（請求項２）、切欠き部はラグの形成領域に重なって設けられ、且つ転輪通過面の存在する領域では、芯金とラグとは重ならない（請求項３）。 The notched portion and the embedded region of the cored bar do not overlap (claim 2), the notched portion is provided overlapping the region where the lug is formed, and in the region where the wheel passing surface exists, the cored metal And the lug do not overlap (claim 3).
　したがって、ラグの一方の端部が切欠き部の形成された領域に有り、且つ他方の端部が隣接する芯金の一方の端部の領域に有ることから、転輪通過面の部材の変形の許容吸収がなされると共に、ラグのグリップ力の確保もなされている。これにより、ラグの強いグリップ力を要するゴムクローラにおいても、切欠き部が存在することによる転輪通過面での転輪エッジ傷の発生を効果的に防止することができる。 Therefore, since one end of the lug is in the area where the notch is formed, and the other end is in the area of one end of the adjacent metal core, deformation of the member of the wheel passing surface is caused. And the grip of the lug is secured. As a result, even in the case of a rubber crawler that requires a strong grip of the lugs, it is possible to effectively prevent the occurrence of roller edge flaws on the roller passing surface due to the presence of the notched portion.
　請求項５に記載のゴムクローラは、請求項４に記載のゴムクローラにおいて、
　前記クローラ本体の周方向で隣り合う前記ラグの前記他方の端部の相互間であって前記芯金の存在しない領域の前記クローラ本体の外周面にはクローラ本体の縁部まで前記幅方向に伸長する凹部が形成されたことを特徴とする。 The rubber crawler according to claim 5 is the rubber crawler according to claim 4.
Between the other ends of the lugs adjacent in the circumferential direction of the crawler body, the outer peripheral surface of the crawler body in the area where the core metal does not exist extends in the width direction to the edge of the crawler body A recess is formed.
　この構成により、ラグの強いグリップ力を要するゴムクローラにおいて、ラグの一方の端部が切欠き部の形成された領域に有り、且つ他方の端部が隣接する芯金の一方の端部の領域に有ることにより生じるゴムクローラの曲げ剛性の増大を抑えることができる。すなわち、芯金の幅方向端部の領域において、芯金間のクローラ本体の外周面に、クローラ本体の縁部まで幅方向に伸長する凹部を形成したので曲げ剛性を小さくすることができる。この凹部は、クローラ本体を構成する部材を肉抜きした箇所である。したがって、転輪エッジ傷の発生を抑えつつ、強いラグのグリップ力を要するゴムクローラの曲げ剛性を低減することが可能である。 With this configuration, in the rubber crawler requiring a strong grip of the lug, the end of the lug is in the area where the notch is formed, and the other end is the area of the end of the metal core adjacent to one another. Increase in the bending stiffness of the rubber crawler caused by the presence of That is, in the region of the widthwise end of the cored bar, since the recess extending in the widthwise direction to the edge of the crawler main body is formed on the outer peripheral surface of the crawler main body between the cored bars, the bending rigidity can be reduced. The recess is a portion where a member constituting the crawler main body is lightened. Therefore, it is possible to reduce the bending rigidity of the rubber crawler requiring the grip of a strong lug while suppressing the occurrence of rolling wheel edge flaws.
　本発明のゴムクローラによれば、転輪通過面にその幅を転輪の幅より小さくする切欠き部を所定箇所に複数設けたので、転輪通過時の押圧力による転輪通過面の構成部材の変形は、切欠き部の空間で許容吸収され、転輪のエッジ傷の発生が効果的に防止される。 According to the rubber crawler of the present invention, a plurality of notches for reducing the width of the rolling wheel passing surface than the width of the rolling wheel are provided at a predetermined location, so the configuration of the rolling wheel passing surface by the pressing force when passing the rolling wheel The deformation of the member is allowed to be absorbed in the space of the notch and the occurrence of the edge flaw of the rolling wheel is effectively prevented.
本発明のゴムクローラの第１の実施の形態に係り、クローラ本体の内周面の平面図である。It concerns on 1st Embodiment of the rubber crawler of this invention, and is a top view of the internal peripheral surface of a crawler main body. 本発明のゴムクローラの第１の実施の形態に係り、クローラ本体の外周面の平面図である。It concerns on 1st Embodiment of the rubber crawler of this invention, and is a top view of the outer peripheral surface of a crawler main body. 本発明のゴムクローラの第１の実施の形態に係り、図１のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 according to the first embodiment of the rubber crawler of the present invention. 本発明のゴムクローラの第２の実施の形態に係り、クローラ本体の内周面の平面図である。It concerns on 2nd embodiment of the rubber crawler of this invention, and is a top view of the internal peripheral surface of a crawler main body. 本発明のゴムクローラの第２の実施の形態に係り、クローラ本体の外周面の平面図である。It concerns on 2nd Embodiment of the rubber crawler of this invention, and is a top view of the outer peripheral surface of a crawler main body. 本発明のゴムクローラの第２の実施の形態に係り、図４のＡ－Ａ断面図を示す。A second embodiment of the rubber crawler according to the present invention is illustrated in a sectional view taken along line AA in FIG. 従来のゴムクローラに係り、同図（ａ）はクローラ本体の内周面の平面図、同図（ｂ）は同図（ａ）のＡ－Ａ断面図を示す。The figure (a) relates to the conventional rubber crawler, and the figure (a) shows the top view of the inner skin of a crawler main body, and the figure (b) shows the AA sectional view of the figure (a). 従来のゴムクローラに係り、図７（ｂ）のＢ－Ｂ断面図であり、転輪通過時を示す。FIG. 7 (b) is a cross-sectional view taken along a line BB in FIG. 7 (b), showing a time when a roller is passed, according to a conventional rubber crawler.
　本発明の実施の形態を以下、図面を用いて詳述する。第１の実施の形態は、本発明を硬い地面を走行するといったグリップ力を要するゴムクローラに適用した場合について示している。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The first embodiment shows a case where the present invention is applied to a rubber crawler requiring a grip force such as traveling on a hard ground.
（第１の実施の形態）
　図１は、ゴムクローラの内周面の平面図であり、図２は、図１に示したゴムクローラの外周面の平面図である。図３は、図１のＡ－Ａ断面図である。 First Embodiment
FIG. 1 is a plan view of the inner peripheral surface of the rubber crawler, and FIG. 2 is a plan view of the outer peripheral surface of the rubber crawler shown in FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG.
　まず、クローラ本体には、周方向に等間隔で芯金１２が埋設されている。芯金１２は、図示のように、クローラ本体の幅方向に左右の両翼部を有し、中央部にはクローラ本体の内周面側に突出した転輪案内用突起部１４が形成されている。転輪案内用突起部１４のクローラ本体の幅方向の両外側には、転輪が通過する転輪通過面１６が形成されている。 First, the core metal 12 is embedded in the crawler main body at equal intervals in the circumferential direction. As shown in the figure, the cored bar 12 has right and left wing portions in the width direction of the crawler body, and in the center portion, there are formed rolling wheel guiding projections 14 projecting to the inner peripheral surface side of the crawler body. . A wheel passing surface 16 through which the wheel passes is formed on both outer sides in the width direction of the crawler body of the wheel guiding projection portion 14.
　転輪通過面１６は、クローラ本体の周方向に連続で形成されているが、芯金１２が直下にない部分には、図示したように、クローラ本体の幅方向外側端縁部に切欠き部２４が設けられ、切欠き部２４が設けられた領域では、転輪通過面１６の幅は、転輪よりも小さくなっている。すなわち、転輪通過面１６には、クローラ本体の周方向に、その幅が転輪の幅より小さい領域が複数存在する。切欠き部２４の形状は平面視で略半円状であるが、転輪通過面１６の幅を小さくするような形状であればこれに限らない。 The rolling wheel passing surface 16 is continuously formed in the circumferential direction of the crawler body, but as shown in the drawing, a notch is formed in the width direction outer edge of the crawler body in a portion where the core 12 is not directly below In the area where the notch 24 is provided, the width of the wheel passing surface 16 is smaller than that of the wheel. That is, there are a plurality of regions in the circumferential direction of the crawler body on the rolling wheel passage surface 16 whose width is smaller than the width of the rolling wheels. The shape of the notch 24 is substantially semicircular in plan view, but the shape is not limited to this as long as the width of the wheel passing surface 16 is reduced.
　ラグ２２は、幅やパターンは用途に応じて適宜決めることが可能であり、本実施の形態のゴムクローラは、ラグのグリップ力を強めるために、図２に示すように接地面２２ａの幅が通常よりも広目に設定され、クローラ本体の周方向に直交する方向に対して傾斜して延在している。また、ラグ２２の一方の端部は、クローラ本体の外周面の厚さ方向に転輪通過面１６が存在する領域に形成され、他方の端部は、厚さ方向に隣接する芯金１２が存在する領域に形成されている。 The width and pattern of the lugs 22 can be appropriately determined according to the application, and the rubber crawler of this embodiment has a width of the ground surface 22a as shown in FIG. 2 in order to enhance the grip of the lugs. It is set wider than usual, and extends obliquely with respect to the direction orthogonal to the circumferential direction of the crawler body. Further, one end of the lug 22 is formed in a region where the wheel passing surface 16 exists in the thickness direction of the outer peripheral surface of the crawler body, and the other end is a cored bar 12 adjacent in the thickness direction. It is formed in the existing area.
　ラグ２２の一方の端部の内周面側の転輪通過面１６に、切欠き部２４が設けられている。すなわち、転輪通過面１６の切欠き部２４の形成領域では厚さ方向にラグ２２が存在し、また、転輪通過面１６の存在領域では芯金１２とラグ２２の接地面２２ａとはほぼ重なっていない。なお、この重なりの回避は、一部において重なり部分が生じていても、後述する本実施の形態の作用効果を奏することが可能である。例えば、転輪通過面１６の存在する領域の幅方向の半分以上において、ラグの接地面２２ａと芯金１２とが厚さ方向で重なっていなければ良い。 A notched portion 24 is provided on the roller passing surface 16 on the inner peripheral surface side of one end of the lug 22. That is, the lugs 22 are present in the thickness direction in the region where the notches 24 of the wheel passing surface 16 are formed, and in the region where the wheel passing surface 16 is present, the core 12 and the contact surface 22a of the lug 22 are substantially It does not overlap. In addition, it is possible to achieve the effect of the present embodiment to be described later, even if a part of the overlap is generated in the avoidance of the overlap. For example, in half or more of the width direction of the region where the wheel passing surface 16 exists, it is preferable that the contact surface 22a of the lug and the core metal 12 do not overlap in the thickness direction.
　上記のような構成を採用することで、以下に説明する効果を奏する。 By adopting the configuration as described above, the following effects can be obtained.
　まず、転輪が転輪通過面１６を通過する際、機体荷重により転輪通過面１６が下方側に沈み込み転輪通過面１６は変形するが、切欠き部２４が存在するので、転輪の沈み込みによる転輪通過面１６の変形は切欠き部２４の空間で許容吸収される。したがって、連続的なエッジ傷が転輪通過面１６の表面に形成されることが防止される。また、切欠き部２４の形成されていない部分のエッジ傷の発生も緩和される。 First, when the rolling wheel passes through the rolling wheel passing surface 16, the rolling wheel passing surface 16 sinks downward due to the vehicle body load, and the rolling wheel passing surface 16 is deformed, but the notch portion 24 is present. The deformation of the wheel passing surface 16 due to the sinking of the gear is allowed to be absorbed in the space of the notch 24. Therefore, continuous edge flaws are prevented from being formed on the surface of the wheel passing surface 16. In addition, the occurrence of edge flaws in the portion where the notch 24 is not formed is also alleviated.
　次に、芯金１２間の転輪通過面１６に切欠き部２４があり、切欠き部２４の外周面側にはラグ２２が存在している。すなわち、芯金１２間にラグ２２が存在する構造（芯金間ラグ構造）であって切欠き部２４の設置領域とラグ２２が重なっているので、転輪が切欠き部２４の存在する転輪通過面１６を通過する際に、転輪とラグ２２の接地面２２ａとの押圧力による転輪通過面１６を構成する部材の変形は、厚さ方向に芯金１２が存在しないので一様に生じる。したがって、切欠き部２４の転輪通過面１６の変形の許容吸収による保護の作用がより安定したものとなる。また、芯金１２の埋設領域と切欠き部２４の設置領域は、一部重なった領域が存在しても主たる領域が重なっていなければ足り、本実施の形態の上記作用効果を奏することが可能である。 Next, there are notches 24 in the wheel passing surface 16 between the core metals 12, and lugs 22 are present on the outer peripheral surface side of the notches 24. That is, in the structure in which the lugs 22 exist between the core metals 12 (inter-core metal lug structure) and the installation area of the notches 24 and the lugs 22 overlap, the rolling wheel where the notches 24 are present When passing through the wheel passage surface 16, the deformation of the members constituting the wheel passage surface 16 due to the pressing force between the wheel and the contact surface 22a of the lug 22 is uniform since the metal core 12 does not exist in the thickness direction. It occurs in Therefore, the action of protection by the allowable absorption of the deformation of the roller passing surface 16 of the notch 24 becomes more stable. Further, in the embedded area of the metal core 12 and the installation area of the notch 24, even if there is an overlapping area, it is sufficient as long as the main areas do not overlap, and it is possible to achieve the above-mentioned effects of the present embodiment. It is.
　更に、芯金１２の存在領域での転輪通過面１６は、転輪の幅よりも小さくなっていないので、転輪と芯金１２の間の転輪通過面１６では、単位面積当たりの押圧力の増大は回避される。したがって、所謂虫食いのような部分的な損傷も回避することができる。これによって、芯金１２の部分の埋設領域の転輪通過面の保護を図りつつ、切欠き部２４による転輪通過面１６の変形の許容吸収による保護が達成されている。 Furthermore, since the wheel passing surface 16 in the region in which the core metal 12 is present is not smaller than the width of the rolling wheel, in the roller passing surface 16 between the rolling wheel and the core metal 12, the pressure per unit area is reduced. An increase in pressure is avoided. Therefore, partial damage such as so-called worming can also be avoided. As a result, while protecting the wheel passing surface of the embedded region of the portion of the cored bar 12, protection by absorbing the deformation of the wheel passing surface 16 by the notches 24 is achieved.
　すなわち、切欠き部２４による転輪通過面１６を構成する部材の変形の許容吸収を図りつつ芯金１２上での部材の保護が図られる。 That is, protection of the members on the metal core 12 is achieved while achieving the absorption of deformation of the members of the wheel passing surface 16 by the notches 24.
　また、芯金１２が直下にある転輪通過面１６に、転輪から押圧力を受けた場合、印加された押圧力は直下にラグ２２の接地面２２ａが存在しないので、押圧力はクローラ本体の周方向で隣接するラグ２２が存在する斜め方向に分散し、押圧力の集中が回避される。 In addition, when a pressing force is received from the rotating wheel on the wheel passing surface 16 in which the core 12 is directly below, the pressing force applied is the crawler body because the contact surface 22a of the lug 22 does not exist immediately below. In the circumferential direction, adjacent lugs 22 are dispersed in the diagonal direction, and concentration of pressure is avoided.
　更にまた、ラグ２２は、前述のように一方の端部は、転輪通過面１６の存在する領域の外周面側に形成され、他方の端部は、隣接する芯金１２の幅方向端部の領域の外周面まで延在している。このような構成では、ゴムクローラの曲げ剛性の増大が懸念されるが、本実施の形態では、芯金の幅方向端部の領域において、芯金間のクローラ本体の外周面に、クローラ本体の縁部まで幅方向に伸長する凹部２８を形成することで曲げ剛性を小さくすることができた。この凹部２８は、クローラ本体を構成する部材を肉抜きした箇所である。したがって、転輪エッジ傷の発生を抑えつつ、強いラグのグリップ力を要するゴムクローラの曲げ剛性を低減することが可能であり、振動の発生を抑え乗り心地及び燃費を良くすることができた。 Furthermore, as described above, one end of the lug 22 is formed on the outer peripheral surface side of the region where the wheel passing surface 16 exists, and the other end is the widthwise end of the adjacent core metal 12 Extends to the outer peripheral surface of the region of In such a configuration, there is a concern that the bending stiffness of the rubber crawler is increased. However, in the present embodiment, in the area of the widthwise end of the core metal, the outer peripheral surface of the crawler main body between the core metal By forming the recess 28 extending in the width direction to the edge, the bending rigidity can be reduced. The recess 28 is a portion where a member constituting the crawler body is lightened. Therefore, it is possible to reduce the bending rigidity of the rubber crawler requiring the grip of a strong lug while suppressing the occurrence of rolling wheel edge flaws, and it was possible to suppress the occurrence of vibration and to improve ride comfort and fuel consumption.
　本発明の第１の実施の形態のゴムクローラによれば、硬い地面を走行するといったグリップ力を要する場合において、芯金間ラグ構造を採用し、直下に芯金１２が存在しない転輪通過面１６に、その幅方向外側端縁部に切欠き部２４を形成したので、転輪通過時の押圧力による転輪通過面１６を構成する部材の変形は、切欠き部２４の空間で許容吸収され、転輪のエッジ傷の発生が効果的に防止される。また、転輪と芯金１２の間の転輪通過面での単位面積当たりの押圧力の増大が防止され、所謂虫食いのような部分的な損傷も回避することができる。これにより、ゴムクローラの寿命を延ばすことができる。 According to the rubber crawler of the first embodiment of the present invention, in the case where a grip force of traveling on a hard ground is required, a lug structure between core bars is adopted, and a wheel passing surface where the core bar 12 does not exist directly below Since the notches 24 are formed at the outer side edge in the width direction at 16, deformation of members constituting the wheel passing surface 16 due to the pressing force when passing through the rollers is absorbed in the space of the notches 24. And the occurrence of edge flaws on the rolling wheels is effectively prevented. In addition, an increase in pressing force per unit area on the wheel passing surface between the wheel and the core metal 12 can be prevented, and partial damage such as so-called worming can be avoided. This can extend the life of the rubber crawler.
　また、上述の様に、切欠き部２４と芯金１２とが重ならない構成、及び芯金１２とラグの接地面２２ａとが重ならない構成については、完全な非重複を意味するものではなく、一部において重なりが生じていても上記各実施の形態の作用は奏されるものである。 Further, as described above, the configuration in which the notched portion 24 and the core metal 12 do not overlap, and the configuration in which the core metal 12 and the contact surface 22a of the lug do not overlap do not mean complete non-overlapping. The effects of each of the above-described embodiments can be achieved even if the overlap occurs in part.
（第２の実施の形態）
　第２の実施の形態は、本発明を田圃の様な比較的、軟弱地を走行するゴムクローラに適用した場合について示している。図４は、ゴムクローラの内周面の平面図であり、図５は、図１に示したゴムクローラの外周面の平面図である。図６は、図４のＡ－Ａ断面図である。 Second Embodiment
The second embodiment shows the case where the present invention is applied to a rubber crawler traveling on a relatively soft ground such as rice straw. FIG. 4 is a plan view of the inner peripheral surface of the rubber crawler, and FIG. 5 is a plan view of the outer peripheral surface of the rubber crawler shown in FIG. 6 is a cross-sectional view taken along the line AA of FIG.
　図１～３に示した硬い地面を走行するといったグリップ力を要するゴムクローラと比較すると、芯金の埋設領域と切欠き部の設置領域は重なっていないこと、切欠き部はラグの形成領域に重なっていること、転輪通過面において、芯金とラグの接地面領域とは重ならないことは同じである。しかし、芯金の大きさ、クローラ本体の外周面側に突出形成されたラグの大きさや形状が異なっている。 Compared with the rubber crawler requiring grip power to travel on a hard ground as shown in FIGS. 1 to 3, the core metal embedded area and the installation area of the notch do not overlap, and the cutout is the area where the lug is formed. It is the same that overlapping, in the rolling wheel passage plane, the contact areas of the core metal and the lug do not overlap. However, the size of the cored bar, and the size and shape of the lugs protrudingly formed on the outer peripheral surface side of the crawler main body are different.
　芯金３２は、硬い地面を走行するといったグリップ力を要するゴムクローラ用のものと比較し、幅が狭くクローラ本体の幅方向へ伸長している翼部の長さも短い。ラグは、長ラグ４２ａと短ラグ４２ｂとが存在する。短ラグ４２ｂは、クローラ本体の周方向と直交する方向に僅かに傾斜して、転輪通過面３６が存在する領域の外周面側に形成されている。長ラグ４２ａは、短ラグ４２ｂと略平行に転輪通過面３６が存在する領域の外周面側に伸長し、その後、周方向と直交する方向と並行する方向にクローラ本体の端部まで延在している。短ラグ４２ｂは長ラグ４２ａの約半分の長さであり、クローラ本体の周方向に長ラグ４２ａ、短ラグ４２ｂが交互に設けられている。また、ラグ４２ａ、４２ｂの接地面４２ｃの幅は硬い地面を走行するといったグリップ力を要するものの幅より狭く、クローラ本体の外周面４０には第１の実施の形態で説明したような凹部は設けられていない。 The cored bar 32 is narrow in width and short in length of the wings extending in the width direction of the crawler body, as compared with those for rubber crawlers that require a gripping force to travel on a hard ground. The lugs include a long lug 42a and a short lug 42b. The short lugs 42b are slightly inclined in the direction orthogonal to the circumferential direction of the crawler body, and are formed on the outer peripheral surface side of the region where the wheel passing surface 36 exists. The long lugs 42a extend on the outer peripheral surface side of the region where the wheel passing surface 36 exists substantially in parallel with the short lugs 42b, and then extend to the end of the crawler main body in the direction parallel to the circumferential direction. doing. The short lugs 42b are about half the length of the long lugs 42a, and the long lugs 42a and the short lugs 42b are alternately provided in the circumferential direction of the crawler body. Further, the width of the ground contact surface 42c of the lugs 42a and 42b is narrower than that of a grip requiring traveling on a hard ground, and the outer circumferential surface 40 of the crawler main body is provided with a recess as described in the first embodiment. It is not done.
　切欠き部４４は、硬い地面を走行するといったグリップ力を要するゴムクローラと同様に、直下に芯金３２がなく、且つ直下にラグ４２ａ、４２ｂがある転輪通過面３６に形成されている。図１のゴムクローラの切欠き部２４と比較すると、芯金３２間の間隔が広い分、大きいものとなっている。また、切欠き部４４の形状は、平面視で略半円状であるが、転輪通過面３６の幅を小さくするものであればこれに限らない。 The notched portion 44 is formed on the wheel passing surface 36 which has no core metal 32 directly below and has lugs 42a and 42b directly below, similar to a rubber crawler requiring grip power to travel on a hard ground. As compared with the notches 24 of the rubber crawler of FIG. Moreover, although the shape of the notch part 44 is substantially semicircular shape in planar view, if the width | variety of the wheel passing surface 36 is made small, it will not be restricted to this.
　芯金３２の大きさとラグ４２ａ、４２ｂの大きさ、形成パターン、接地面の大きさ等、第１の実施の形態とは異なる部分があるが、第１の実施の形態の硬い地面を走行するといったグリップ力を要するゴムクローラについて述べた同様の作用、効果を得ることができる。 Although there are parts different from the first embodiment, such as the size of the metal core 32, the size of the lugs 42a and 42b, the formation pattern, the size of the contact surface, etc., the vehicle travels the hard ground of the first embodiment. It is possible to obtain the same operation and effect as described for the rubber crawler requiring a gripping force.
　まず、転輪が転輪通過面３６を通過する際、機体荷重により転輪通過面３６が下方側に沈み込み転輪通過面３６は変形するが、切欠き部４４が存在するので、転輪の沈み込みによる転輪通過面３６の変形は切欠き部４４の空間で許容吸収される。したがって、連続的なエッジ傷が転輪通過面３６の表面に形成されることが防止される。また、切欠き部４４の形成されていない部分のエッジ傷の発生も緩和される。 First, when the rolling wheel passes through the rolling wheel passing surface 36, the rolling wheel passing surface 36 sinks downward due to the vehicle body load and the rolling wheel passing surface 36 is deformed, but the notch portion 44 exists. The deformation of the wheel passing surface 36 due to the sinking of the gear is allowed to be absorbed in the space of the notch 44. Therefore, continuous edge flaws are prevented from being formed on the surface of the wheel passing surface 36. In addition, the occurrence of edge flaws in the portion where the notch 44 is not formed is also alleviated.
　次に、芯金３２間の転輪通過面３６に切欠き部４４があり、切欠き部４４の外周面側にはラグ４２ａ、４２ｂが存在している。すなわち、芯金間３２にラグ２ａ、４２が存在する構造（芯金間ラグ構造）であって切欠き部４４の設置領域とラグ４２ａ、４２ｂが重なっているので、転輪が切欠き部４４の存在する転輪通過面３６を通過する際に、転輪とラグ４２ａ、４２ｂの接地面４２ｃとの押圧力による転輪通過面３６を構成する部材の変形は、厚さ方向に芯金３２が存在しないので一様に生じる。切欠き部４４の転輪通過面３６の変形の許容吸収による保護の作用がより安定したものとなる。また、芯金３２の埋設領域と切欠き部４４の設置領域は、一部重なった領域が存在しても主たる領域が重なっていなければ足り、本実施の形態の上記作用効果を奏することが可能である。 Next, there are notches 44 in the wheel passing surface 36 between the core metals 32, and lugs 42a and 42b are present on the outer peripheral surface side of the notches 44. That is, in the structure in which the lugs 2a and 42 are present between the cored bars (cored lugs structure) and the installation area of the notches 44 and the lugs 42a and 42b overlap, the rolling wheel is notched 44 When passing through the wheel passing surface 36 where the wheel exists, the deformation of the members constituting the wheel passing surface 36 due to the pressing force between the wheel and the contact surfaces 42c of the lugs 42a and 42b is the cored bar 32 in the thickness direction. Because it does not exist, it occurs uniformly. The action of the protection by the absorption of deformation of the roller passing surface 36 of the notch 44 becomes more stable. Further, in the embedded area of the metal core 32 and the installation area of the notch portion 44, it is sufficient if the main areas do not overlap even if there is an overlapping area, and it is possible to achieve the above-described effects of the present embodiment. It is.
　更に、芯金３２の存在領域での転輪通過面３６は、転輪の幅よりも小さくなっていないので、転輪と芯金３２の間の転輪通過面３６では、単位面積当たりの押圧力の増大は回避される。したがって、所謂虫食いのような部分的な損傷も回避することができる。これによって、芯金３２の部分の埋設領域の転輪通過面の保護を図りつつ、切欠き部４４による転輪通過面３６の変形の許容吸収による保護が達成されている。 Furthermore, since the wheel passing surface 36 in the region where the core metal 32 is present is not smaller than the width of the rolling wheel, the wheel passing surface 36 between the rolling wheel and the core metal 32 has a pressure per unit area An increase in pressure is avoided. Therefore, partial damage such as so-called worming can also be avoided. As a result, while protecting the wheel passing surface of the embedded region of the portion of the cored bar 32, protection by permitting or absorbing the deformation of the wheel passing surface 36 by the notch portion 44 is achieved.
　すなわち、切欠き部４４による転輪通過面３６を構成する部材の変形の許容吸収を図りつつ芯金３２上での部材の保護が図られる。 That is, protection of the members on the cored bar 32 is achieved while achieving the absorption of deformation of the members constituting the wheel passing surface 36 by the notches 44.
　また、芯金３２が直下にある転輪通過面３６に、転輪から押圧力を受けた場合、印加された押圧力は直下にラグ４２ａ、４２ｂの接地面４２ｃが存在しないので、押圧力はクローラ本体の周方向で隣接するラグ４２ａ、４２ｂが存在する斜め方向に分散し、押圧力の集中が回避される。 In addition, when a pressing force is applied from the rotating wheel to the wheel passing surface 36 in which the core metal 32 is directly below, since the applied pressing force does not have the contact surface 42c of the lugs 42a and 42b immediately below, the pressing force is It disperses in the diagonal direction in which the adjacent lugs 42a and 42b exist in the circumferential direction of the crawler body, and concentration of pressure is avoided.
　更に、芯金３２は、クローラ本体の周方向幅が小さく、幅方向に延在している翼部の長さも小さいので、ゴムクローラ３０の重量を軽くすることができ、且つ芯金３２とラグ４２ａ、４２ｂの接地面４２ｃとの厚さ方向での重なりが存在しないので、クローラ本体の曲げ剛性も小さくすることができる。 Furthermore, since the core metal 32 has a small width in the circumferential direction of the crawler body and a small length of the wings extending in the width direction, the weight of the rubber crawler 30 can be reduced, and the core metal 32 and lugs Since there is no overlap in the thickness direction of the contact surfaces 42a and 42b with the contact surface 42c, the bending rigidity of the crawler body can be reduced.
　本発明の第２の実施の形態のゴムクローラによれば、田圃の様な比較的、軟弱地を走行する場合において、芯金間ラグ構造を採用し、直下に芯金３２が存在しない転輪通過面３６に、その幅方向外側端縁部に切欠き部４４を形成したので、転輪通過時の押圧力による転輪通過面３６を構成する部材の変形は、切欠き部４４の空間で許容吸収され、転輪のエッジ傷の発生が効果的に防止される。また、転輪と芯金３２の間の転輪通過面での単位面積当たりの押圧力の増大が防止され、所謂虫食いのような部分的な損傷も回避することができる。これにより、ゴムクローラの寿命を延ばすことができる。 According to the rubber crawler of the second embodiment of the present invention, in the case of traveling on a relatively soft ground such as rice straw, a lug structure between the core bars is adopted, and the rolling wheel without the core bar 32 directly below Since the notch 44 is formed in the widthwise outer end edge of the passage surface 36, the deformation of the member constituting the roller passage surface 36 due to the pressing force at the time of passing the rollers is the space of the notch 44. Permissible absorption, and the occurrence of the edge flaws of the rolling wheels can be effectively prevented. In addition, an increase in pressing force per unit area on the wheel passing surface between the wheel and the core metal 32 can be prevented, and partial damage such as so-called worming can be avoided. This can extend the life of the rubber crawler.
　また、上述の様に、切欠き部４４と芯金３２とが重ならない構成、及び芯金３２とラグの接地面４２ｃとが重ならない構成については、完全な非重複を意味するものではなく、一部において重なりが生じていても上記各実施の形態の作用は奏されるものである。 Further, as described above, the configuration in which the notched portion 44 and the core metal 32 do not overlap, and the configuration in which the core metal 32 and the contact surface 42c of the lug do not overlap do not mean complete non-overlapping. The effects of each of the above-described embodiments can be achieved even if the overlap occurs in part.
　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、実施の形態では硬い地面を走行する場合、及び軟弱地を走行する場合のゴムクローラについて示したがこれに限定されない。また、切欠き部の形状については、転輪通過面の幅を小さくするようなものであれば他の形状でも良く、例えば、切欠き部が三角形、長方形、台形状であっても良い。特に、曲線状で構成されておれば、長方形等の時と比べて、クラックが入り難くより好ましい。 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, in the embodiment, the rubber crawler is shown when traveling on a hard ground and when traveling on a soft ground, but is not limited thereto. The shape of the notch may be another shape as long as it reduces the width of the wheel passing surface. For example, the notch may be triangular, rectangular or trapezoidal. In particular, if it is configured in a curvilinear shape, it is more preferable that cracking is less likely to occur than in the case of a rectangle or the like.
１０、３０、４６　ゴムクローラ
１２、３２、４８　芯金
１４、３４、５０　案内用突起
１６、３６、５２　転輪通過面
１８、３８、５４　クローラ本体の内周面
２０、４０、５６　クローラ本体の外周面
２２、４２ａ、４２ｂ、５８　ラグ
２２ａ、４２ｃ　ラグ接地面
２４、４４　切欠き部
２６　転輪
２８　凹部 10, 30, 46 Rubber crawler 12, 32, 48 Core metal 14, 34, 50 Guide projection 16, 36, 52 Roller wheel passing surface 18, 38, 54 Inner circumferential surface 20, 40, 56 of crawler body Outer circumferential surface 22, 42a, 42b, 58 lug 22a, 42c lug contact surface 24, 44 notch 26 rolling wheel 28 recess

Claims (5)

  1. 　無端帯状のクローラ本体と、該クローラ本体の外周面に所定の間隔で突出形成されたラグと、前記クローラ本体の内周面に設けられた転輪が通過する転輪通過面と、を有するゴムクローラにおいて、
    　前記転輪通過面は、
    　該転輪通過面の前記クローラ本体の幅方向外側端縁部に、該転輪通過面の幅が前記転輪の幅より小さくなるように切欠き部が設けられ、該切欠き部は前記クローラ本体の周方向に所定の間隔をおいて複数設けられたことを特徴とするゴムクローラ。     Rubber having an endless belt-like crawler main body, lugs formed protruding from the outer peripheral surface of the crawler main body at a predetermined interval, and a wheel passing surface through which a roller provided on the inner peripheral surface of the crawler main body passes In the crawler,
    The roller passing surface is
    A notch is provided at the widthwise outer end edge of the crawler main body in the wheel passing surface such that the width of the wheel passing surface is smaller than the width of the wheel, and the notch is the crawler A rubber crawler characterized in that a plurality of rubber crawlers are provided at predetermined intervals in the circumferential direction of the main body.
  2. 　前記クローラ本体には、芯金がその左右の両翼が該クローラ本体の幅方向に伸長するように該クローラ本体の周方向に所定の間隔を置いて埋設されており、
    　前記切欠き部の形成領域は、
    　前記クローラ本体の厚さ方向にて前記芯金の存在しない領域の前記内周面であることを特徴とする請求項１に記載のゴムクローラ。     In the crawler body, a core metal is embedded at a predetermined interval in the circumferential direction of the crawler body so that the left and right wings extend in the width direction of the crawler body,
    The formation region of the notches is:
    The rubber crawler according to claim 1, wherein the rubber crawler is the inner peripheral surface of a region where the core metal does not exist in the thickness direction of the crawler main body.
  3. 　前記切欠き部の形成領域は、
    　前記ラグの存在する領域に対向する前記内周面の領域であり、且つ、
    　前記転輪通過面の存在する領域では、前記芯金と前記ラグの接地面領域とが前記厚さ方向において重ならない配置とされたことを特徴とする請求項２に記載のゴムクローラ。     The formation region of the notches is:
    An area of the inner circumferential surface opposite the area where the lugs are present, and
    The rubber crawler according to claim 2, wherein in the region where the wheel passing surface exists, the core metal and the contact surface region of the lug are arranged so as not to overlap in the thickness direction.
  4. 　前記ラグは、
    　前記クローラ本体の周方向に直交する方向に対して傾斜して伸長しており、一方の端部は前記転輪通過面の存在する領域と前記厚さ方向において重なる領域、他方の端部は前記クローラ本体の周方向で隣接する芯金の一方の端部の設置領域と前記厚さ方向で重なる領域の前記外周面に形成されたことを特徴とする請求項３に記載のゴムクローラ。     The lug is
    One end is an area overlapping the area where the roller passing surface exists in the thickness direction, and the other end is an area that is inclined and extended with respect to the direction orthogonal to the circumferential direction of the crawler body. The rubber crawler according to claim 3, wherein the rubber crawler is formed on the outer peripheral surface of the area overlapping in the thickness direction with the installation area of one end of the core metal adjacent in the circumferential direction of the crawler body.
  5. 　前記クローラ本体の周方向で隣り合う前記ラグの前記他方の端部の相互間であって前記芯金の存在しない領域の前記クローラ本体の外周面にはクローラ本体の縁部まで前記幅方向に伸長する凹部が形成されたことを特徴とする請求項４に記載のゴムクローラ。 Between the other ends of the lugs adjacent in the circumferential direction of the crawler body, the outer peripheral surface of the crawler body in the area where the core metal does not exist extends in the width direction to the edge of the crawler body The rubber crawler according to claim 4, wherein a recess is formed.
PCT/JP2018/038340 2017-11-15 2018-10-15 Rubber crawler-track pad WO2019097923A1 (en)

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JP2017-219667 2017-11-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159943A (en) * 2004-12-02 2006-06-22 Bridgestone Corp Rubber crawler
WO2016185670A1 (en) * 2015-05-21 2016-11-24 株式会社ブリヂストン Elastic crawler and elastic crawler device
WO2017017958A1 (en) * 2015-07-30 2017-02-02 株式会社ブリヂストン Elastic crawler
WO2017017957A1 (en) * 2015-07-30 2017-02-02 株式会社ブリヂストン Elastic crawler and elastic crawler device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159943A (en) * 2004-12-02 2006-06-22 Bridgestone Corp Rubber crawler
WO2016185670A1 (en) * 2015-05-21 2016-11-24 株式会社ブリヂストン Elastic crawler and elastic crawler device
WO2017017958A1 (en) * 2015-07-30 2017-02-02 株式会社ブリヂストン Elastic crawler
WO2017017957A1 (en) * 2015-07-30 2017-02-02 株式会社ブリヂストン Elastic crawler and elastic crawler device

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