JP2021014132A - Rubber crawler - Google Patents

Abstract

To provide a rubber crawler which is free of edge damage caused on a track roller passing surface thereof by a track roller and can avoid partial damage like nibbling.SOLUTION: The rubber crawler includes an endless belt-shaped crawler body, lugs formed to project on an outer peripheral surface of the crawler body at prescribed intervals, and a track roller passing surface 16 which is provided on an inner peripheral surface of the crawler body and on which a track roller passes. The track roller passing surface 16 is provided with cutout parts 24 on outer edges of the track roller passing surface 16 in a breadthwise direction of the crawler body so that a width of the track roller passing surface is smaller than that of the track roller, and the cutout parts 24 are provided in plurality at prescribed intervals in a circumferential direction of the crawler body.SELECTED DRAWING: Figure 1

Description

The present invention relates to a rubber crawler, particularly a rubber crawler having a rolling wheel passing surface on the inner peripheral surface of the crawler body.

Rubber crawlers are rubber tracks, and since they were first developed as undercarriage parts for agricultural equipment, they have been actively researched and developed, and now they are widely used in various applications, and their configurations and types are also widespread. It is wide-ranging.

7A and 7B show an example of a rubber crawler, FIG. 7A is a plan view of an inner peripheral surface 54 of the crawler body of the rubber crawler 46, and FIG. 7B is A-A of FIG. 7A. A sectional view. However, in FIG. 7, the rubber crawler 46 is shown only half in the width direction of the crawler body with respect to the portion where the core metal 48 is embedded. Core metal 48 are arranged and embedded in the rubber crawler 46 at predetermined intervals in the circumferential direction, and each core metal 52 is provided with a guide protrusion 50 for guiding the rolling wheels.

The core metal 52 has a substantially rectangular shape in a plan view, but as shown in the cross-sectional view of FIG. 7B, the guide protrusion 50 is located above the inner peripheral surface side of the crawler body near the central portion in the width direction. A lug 58 for traveling on farmland, a construction site, or the like is formed so as to project on the outer peripheral surface side of the crawler body.

On the inner peripheral surface 54 of the crawler body, a rolling wheel passing surface 52 through which the rolling wheels pass is continuously formed in the circumferential direction of the crawler body so as to have a predetermined width. Here, the width of the rolling wheel passing surface 52 is set wider than the width of the normal rolling wheel, for example, as shown in FIG. 1 of Patent Document 1.

FIG. 8 is a cross section taken along the line BB of FIG. 7B, showing a state when the wheels pass. The rolling wheel passing surface 52 and the ground contact surface of the lug 58 are substantially parallel to each other. When the rolling wheel 26 passes through the core metal 48 and the portion where the core metal 48 does not exist, the rolling wheel 26 sinks into the rolling wheel passing surface 52 due to the load of the machine body, as shown in FIG.

Japanese Unexamined Patent Publication No. 2005-217711

In the rubber crawler 46 shown in FIGS. 7 and 8, as described above, the rolling wheels 26 sink into the rolling wheel passing surface 52 due to the load of the machine body, but when the rolling wheels 26 sink, the rolling wheels 26 A scratch is formed on the rolling wheel passing surface 52 due to the edge of the wheel. The occurrence of this scratch can occur in the portion where the core metal 48 is present or not. If the rolling wheel passing surface 52 is scratched by the edge of the rolling wheel 26, the life of the rubber crawler 46 is shortened, and it has been desired to prevent the scratching from occurring.

On the other hand, it is conceivable that the width of the rolling wheel passing surface 52 is smaller than the width of the rolling wheel 26 over the entire area so that the rolling wheel 26 does not sink, but then the rolling wheel 26 reaches the rolling wheel passing surface 52. The pressing force increases, and sand and pebbles sandwiched between the rolling wheel 26 and the rolling wheel passing surface 52 form defects such as holes and cracks on the surface of the rolling wheel passing surface 52 due to the pressing force, so-called worm-eaten. Problem occurs.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent edge scratches due to rolling wheels on the rolling wheel passing surface of a rubber crawler and to avoid partial damage such as worm-eaten. The purpose is to provide a rubber crawler that can be used.

In order to achieve the above object, the rubber crawler according to claim 1 is
A rubber having an endless band-shaped crawler body, lugs formed on the outer peripheral surface of the crawler body at predetermined intervals, and a wheel passing surface through which the wheels provided on the inner peripheral surface of the crawler body pass. In the crawler
The rolling wheel passing surface is provided with a notch at the lateral outer edge of the crawler body on the rolling wheel passing surface so that the width of the rolling wheel passing surface is smaller than the width of the rolling wheel. A plurality of the notches are provided at predetermined intervals in the circumferential direction of the crawler body.

With this configuration, a notch portion is formed on the rolling wheel passing surface, so that a plurality of regions having a width smaller than the width of the rolling wheel exist in the circumferential direction. Therefore, when the rolling wheels pass through the rolling wheel passing surface, they sink to the lower side of the rolling wheel passing surface due to the load of the airframe and the rolling wheel passing surface is deformed, but since there is a notch, rolling due to the sinking of the rolling wheels Deformation of the ring passing surface is also tolerated in the space of the notch. Therefore, continuous edge scratches are prevented from being formed on the surface of the rolling wheel passing surface, and the occurrence of edge scratches in the portion where the notch is not formed is also alleviated.

The rubber crawler according to claim 2 is the rubber crawler according to claim 1.
A core metal is embedded in the crawler body at predetermined intervals in the circumferential direction of the crawler body so that both left and right wings of the crawler body extend in the width direction of the crawler body, and a region for forming the notch portion. Is the inner peripheral surface of the region where the core metal does not exist in the thickness direction of the crawler body.

With this configuration, the buried area of the core metal and the installation area of the notch do not overlap. Due to the presence of the core metal, the pressing force due to the rolling wheels increases in that part, but since the rolling wheel passage surface in the embedded area of the core metal is not small with respect to the width of the rolling wheels, per unit area of that part. The increase in pressing force is avoided, and partial damage such as so-called worm-eaten can be avoided. Therefore, while protecting the rolling wheel passing surface in the embedded region of the core metal portion, the protection by the allowable absorption of the deformation of the rolling wheel passing surface by the notch is achieved.

Further, it is sufficient that the embedded region of the core metal and the installation region of the notch portion do not substantially overlap, and even if a partially overlapped region exists, the operation of the present invention can be exhibited.

The rubber crawler according to claim 3 is the rubber crawler according to claim 2.
The notched portion forming region is a region of the inner peripheral surface facing the region where the lug exists, and in the region where the rolling wheel passing surface exists, the contact patch region of the core metal and the lug. It is characterized in that and are arranged so as not to overlap in the thickness direction. In this configuration, the notch portion is provided so as to overlap the lug forming region on the rolling wheel passage surface, and the lug ground contact surface does not exist in the thickness direction region where the core metal exists.

With this configuration, when the rolling wheels pass through the rolling wheel passing surface, the rolling wheel passing surface having the notch has a lug on the opposite side, and the ground contact surface of the lug and the core metal do not overlap. Therefore, the deformation of the rolling wheel passing surface due to the pressing force of the rolling wheel and the lug occurs uniformly because there is no core metal in the thickness direction.

Therefore, the deformation absorption action of the rolling wheel passing surface by the notch portion becomes more effective.
Further, it is sufficient that the contact patch region of the core metal and the lug does not substantially overlap in the region in the thickness direction of the wheel passing surface, and the operation of the present invention can be exhibited even if a partially overlapped region exists. Is.

The rubber crawler according to claim 4 is the rubber crawler according to claim 3.
The lug is inclined and extends in a direction orthogonal to the circumferential direction of the crawler body, and one end thereof is a region where the notch is formed and the wheel passage surface and the thickness thereof. The region overlapping in the orthogonal direction and the other end portion are formed on the outer peripheral surface of the region overlapping in the thickness direction with the installation region of one end portion of the core metal adjacent in the circumferential direction of the crawler body. To do.

This configuration corresponds to a rubber crawler with a stronger grip of the lug, such as a rubber crawler when traveling on hard ground, and the lug is inclined with respect to the direction orthogonal to the circumferential direction of the crawler body. One end of the lug is formed in the region where the notch is formed, and the other end is formed in the region of one end of the adjacent core metal.

The notch and the embedded region of the core metal do not overlap (claim 2), and the notch portion is provided so as to overlap the lug forming region, and the core metal is provided in the region where the rolling wheel passing surface exists. And lag do not overlap (Claim 3).
Therefore, since one end of the lug is in the region where the notch is formed and the other end is in the region of one end of the adjacent core metal, the deformation of the member of the rolling wheel passing surface The allowable absorption of the lugs is achieved, and the grip of the lugs is also secured. As a result, even in a rubber crawler that requires a strong grip force of a lug, it is possible to effectively prevent the occurrence of rolling edge scratches on the rolling wheel passing surface due to the presence of the notch.

The rubber crawler according to claim 5 is the rubber crawler according to claim 4.
The outer peripheral surface of the crawler body extends in the width direction to the edge of the crawler body in a region between the other ends of the lugs adjacent to each other in the circumferential direction of the crawler body and in which the core metal does not exist. It is characterized in that a concave portion is formed.

With this configuration, in a rubber crawler that requires a strong grip force of the lug, one end of the lug is in the region where the notch is formed, and the other end is the region of one end of the adjacent core metal. It is possible to suppress an increase in the bending rigidity of the rubber crawler caused by the presence of the rubber crawler. That is, in the region of the end portion in the width direction of the core metal, a concave portion extending in the width direction to the edge portion of the crawler body is formed on the outer peripheral surface of the crawler body between the core metal, so that the bending rigidity can be reduced. This recess is a portion where the members constituting the crawler body are lightened. Therefore, it is possible to reduce the flexural rigidity of the rubber crawler, which requires a strong lug grip force, while suppressing the occurrence of rolling edge scratches.

According to the rubber crawler of the present invention, since a plurality of notches having a width smaller than the width of the rolling wheels are provided at predetermined positions on the rolling wheel passing surface, the structure of the rolling wheel passing surface due to the pressing force when passing the rolling wheels is provided. Deformation of the member is tolerated in the space of the notch, and the occurrence of edge scratches on the wheels is effectively prevented.

It is a top view of the inner peripheral surface of the crawler body according to the 1st Embodiment of the rubber crawler of this invention. It is a top view of the outer peripheral surface of the crawler body according to the 1st Embodiment of the rubber crawler of this invention. FIG. 1A is a cross-sectional view taken along the line AA of FIG. 1 according to the first embodiment of the rubber crawler of the present invention. It is a top view of the inner peripheral surface of the crawler body according to the 2nd Embodiment of the rubber crawler of this invention. It is a top view of the outer peripheral surface of the crawler body according to the 2nd Embodiment of the rubber crawler of this invention. A sectional view taken along the line AA of FIG. 4 is shown according to a second embodiment of the rubber crawler of the present invention. Regarding the conventional rubber crawler, FIG. 6A shows a plan view of the inner peripheral surface of the crawler body, and FIG. 9B shows a sectional view taken along the line AA of FIG. FIG. 7B is a cross-sectional view taken along the line BB of FIG. 7B, which is related to a conventional rubber crawler, and shows the time when the wheels pass.

Embodiments of the present invention will be described in detail below with reference to the drawings. The first embodiment shows a case where the present invention is applied to a rubber crawler that requires a grip force such as running on a hard ground.

(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 the line AA of FIG.

First, the core metal 12 is embedded in the crawler body at equal intervals in the circumferential direction. As shown in the figure, the core metal 12 has both left and right wing portions in the width direction of the crawler main body, and a rolling wheel guiding protrusion 14 protruding toward the inner peripheral surface side of the crawler main body is formed in the central portion. .. Rolling wheel passing surfaces 16 through which the rolling wheels pass are formed on both outer sides of the rolling wheel guiding protrusion 14 in the width direction of the crawler body.

The rolling wheel passing surface 16 is continuously formed in the circumferential direction of the crawler body, but a notch portion is formed at the outer edge portion in the width direction of the crawler body as shown in the portion where the core metal 12 is not directly below. In the region where the 24 is provided and the notch portion 24 is provided, the width of the rolling wheel passing surface 16 is smaller than that of the rolling wheel. That is, the rolling wheel passing surface 16 has a plurality of regions whose width is smaller than the width of the rolling wheel in the circumferential direction of the crawler body. The shape of the notch portion 24 is substantially semicircular in a plan view, but the shape is not limited to this as long as the width of the rolling wheel passing surface 16 is reduced.

The width and pattern of the lug 22 can be appropriately determined according to the intended use, and in the rubber crawler of the present embodiment, the width of the ground contact surface 22a is increased as shown in FIG. 2 in order to strengthen the grip force of the lug. It is set wider than usual and extends at an angle 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 rolling wheel passing surface 16 exists in the thickness direction of the outer peripheral surface of the crawler body, and the other end has a core metal 12 adjacent to the crawler body in the thickness direction. It is formed in the area where it exists.

A notch 24 is provided on the rolling wheel passing surface 16 on the inner peripheral surface side of one end of the lug 22. That is, the lug 22 exists in the thickness direction in the region where the notch portion 24 of the wheel passing surface 16 is formed, and the core metal 12 and the ground contact surface 22a of the lug 22 are substantially in the region where the rolling wheel passing surface 16 exists. It does not overlap. It should be noted that this avoidance of overlap can achieve the effects of the present embodiment, which will be described later, even if some overlap occurs. For example, it is sufficient that the ground contact surface 22a of the lug and the core metal 12 do not overlap in the thickness direction in more than half of the width direction of the region where the rolling wheel passing surface 16 exists.

By adopting the above configuration, the effects described below can be achieved.

First, when the rolling wheels pass through the rolling wheel passing surface 16, the rolling wheel passing surface 16 sinks downward due to the load of the airframe and the rolling wheel passing surface 16 is deformed, but since the notch portion 24 is present, the rolling wheels are present. Deformation of the rolling wheel passing surface 16 due to the sinking of the wheel is allowed and absorbed in the space of the notch portion 24. Therefore, continuous edge scratches are prevented from being formed on the surface of the wheel passing surface 16. In addition, the occurrence of edge scratches on the notched portion 24 where it is not formed is also alleviated.

Next, there is a notch portion 24 on the rolling wheel passing surface 16 between the core metal 12, and a lug 22 exists on the outer peripheral surface side of the notch portion 24. That is, since the structure is such that the lug 22 exists between the cores 12 (the lug structure between the cores) and the installation area of the notch 24 and the lug 22 overlap, the rolling wheel is a rolling wheel in which the notch 24 exists. When passing through the wheel passing surface 16, the members constituting the rolling wheel passing surface 16 due to the pressing force between the rolling wheels and the ground contact surface 22a of the lug 22 are uniformly deformed because the core metal 12 does not exist in the thickness direction. Occurs in. Therefore, the protective action by the allowable absorption of the deformation of the rolling wheel passing surface 16 of the notch portion 24 becomes more stable. Further, the buried area of the core metal 12 and the installation area of the notch portion 24 are sufficient as long as the main areas do not overlap even if there is a partially overlapped area, and the above-mentioned effects of the present embodiment can be obtained. Is.

Further, since the rolling wheel passing surface 16 in the region where the core metal 12 exists is not smaller than the width of the rolling wheels, the rolling wheel passing surface 16 between the rolling wheels and the core metal 12 is pressed per unit area. Increased pressure is avoided. Therefore, partial damage such as so-called worm-eaten can be avoided. As a result, while protecting the rolling wheel passing surface in the embedded region of the core metal 12, the notch 24 achieves protection by allowing the deformation of the rolling wheel passing surface 16 to be absorbed.

That is, the member is protected on the core metal 12 while allowing the notch portion 24 to absorb the deformation of the member constituting the rolling wheel passing surface 16.

Further, when the pressing force is received from the rolling wheels on the rolling wheel passing surface 16 on which the core metal 12 is directly below, the pressing force is applied because the ground contact surface 22a of the lug 22 does not exist directly below the pressing force. The lugs 22 adjacent to each other in the circumferential direction are dispersed in the oblique direction, and the concentration of the pressing force is avoided.

Furthermore, as described above, one end of the lug 22 is formed on the outer peripheral surface side of the region where the rolling wheel passing surface 16 exists, and the other end is the widthwise end of the adjacent core metal 12. It extends to the outer peripheral surface of the area of. In such a configuration, there is a concern that the bending rigidity of the rubber crawler may increase, but in the present embodiment, in the region of the widthwise end portion of the core metal, the outer peripheral surface of the crawler body between the core metals is covered with the crawler body. The bending rigidity could be reduced by forming the recess 28 extending in the width direction to the edge portion. The recess 28 is a portion where the members constituting the crawler body are lightened. Therefore, it is possible to reduce the bending rigidity of the rubber crawler, which requires a strong lug grip force, while suppressing the occurrence of rolling edge scratches, and it is possible to suppress the occurrence of vibration and improve the riding comfort and fuel efficiency.

According to the rubber crawler of the first embodiment of the present invention, when a grip force such as running on a hard ground is required, a lug structure between core metals is adopted, and a rolling wheel passing surface in which the core metal 12 does not exist directly underneath. Since the notch portion 24 is formed in the outer edge portion in the width direction of 16, the deformation of the member constituting the rolling wheel passing surface 16 due to the pressing force when passing the rolling wheel is allowed to be absorbed in the space of the notch portion 24. Therefore, the occurrence of edge scratches on the 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 worm-eaten can be avoided. As a result, the life of the rubber crawler can be extended.

Further, as described above, the configuration in which the notch portion 24 and the core metal 12 do not overlap and the configuration in which the core metal 12 and the ground contact surface 22a of the lug do not overlap do not mean complete non-overlapping. Even if some overlap occurs, the action of each of the above embodiments can be achieved.

(Second Embodiment)
The second embodiment shows a case where the present invention is applied to a rubber crawler traveling on a relatively soft ground such as a rice field. 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. FIG. 6 is a cross-sectional view taken along the line AA of FIG.

Compared to the rubber crawler that requires grip force such as running on the hard ground shown in FIGS. 1 to 3, the embedded area of the core metal and the installation area of the notch do not overlap, and the notch is in the lug forming area. It is the same that they overlap and that the core metal and the contact patch area of the lug do not overlap on the rolling wheel passage surface. However, the size of the core metal and the size and shape of the lugs protruding on the outer peripheral surface side of the crawler body are different.

The core metal 32 is narrower in width and shorter in the length of the wing portion extending in the width direction of the crawler body than that for a rubber crawler that requires a grip force such as running on a hard ground. The lugs include a long lug 42a and a short lug 42b. The short lug 42b is slightly inclined in a direction orthogonal to the circumferential direction of the crawler body and is formed on the outer peripheral surface side of the region where the rolling wheel passing surface 36 exists. The long lug 42a extends substantially parallel to the short lug 42b toward the outer peripheral surface side of the region where the rolling wheel passing surface 36 exists, and then extends to the end of the crawler body in a direction parallel to the direction orthogonal to the circumferential direction. doing. The short lug 42b is about half the length of the long lug 42a, and the long lug 42a and the short lug 42b are alternately provided in the circumferential direction of the crawler body. Further, the width of the contact patch 42c of the lugs 42a and 42b is narrower than the width of the lugs 42a and 42b that require a grip force such as running on a hard ground, and the outer peripheral surface 40 of the crawler body is provided with a recess as described in the first embodiment. Not done.

The cutout portion 44 is formed on the wheel passing surface 36 having no core metal 32 directly below and lugs 42a and 42b directly below, like a rubber crawler that requires a grip force such as running on a hard ground. Compared with the notch 24 of the rubber crawler of FIG. 1, the distance between the cores 32 is wider, which is larger. Further, the shape of the notch portion 44 is substantially semicircular in a plan view, but the shape is not limited to this as long as the width of the rolling wheel passing surface 36 is reduced.

Although there are some differences from the first embodiment, such as the size of the core metal 32, the sizes of the lugs 42a and 42b, the formation pattern, and the size of the ground contact surface, the vehicle travels on the hard ground of the first embodiment. It is possible to obtain the same action and effect as described for rubber crawlers that require gripping force.

First, when the rolling wheels pass through the rolling wheel passing surface 36, the rolling wheel passing surface 36 sinks downward due to the load of the airframe and the rolling wheel passing surface 36 is deformed, but since the notch 44 is present, the rolling wheels are present. Deformation of the rolling wheel passing surface 36 due to the sinking of the wheel is allowed and absorbed in the space of the notch 44. Therefore, continuous edge scratches are prevented from being formed on the surface of the wheel passing surface 36. In addition, the occurrence of edge scratches on the notch 44 where the notch 44 is not formed is alleviated.

Next, there is a notch 44 on the rolling wheel passing surface 36 between the cores 32, and lugs 42a and 42b are present on the outer peripheral surface side of the notch 44. That is, in a structure in which the lugs 2a and 42 exist in the core metal gap 32 (core metal lug structure), the installation area of the notch portion 44 and the lugs 42a and 42b overlap, so that the rolling wheels are in the notch portion 44. When passing through the rolling wheel passing surface 36 in which the wheel exists, the deformation of the member constituting the rolling wheel passing surface 36 due to the pressing force between the rolling wheel and the contact patch 42c of the lugs 42a and 42b is the core metal 32 in the thickness direction. Occurs uniformly because there is no. The protective action by the allowable absorption of the deformation of the rolling wheel passing surface 36 of the notch portion 44 becomes more stable. Further, the buried area of the core metal 32 and the installation area of the notch 44 are sufficient as long as the main areas do not overlap even if there is a partially overlapped area, and the above-mentioned effects of the present embodiment can be obtained. Is.

Further, since the rolling wheel passing surface 36 in the region where the core metal 32 exists is not smaller than the width of the rolling wheels, the rolling wheel passing surface 36 between the rolling wheels and the core metal 32 is pressed per unit area. Increased pressure is avoided. Therefore, partial damage such as so-called worm-eaten can be avoided. As a result, while protecting the rolling wheel passing surface in the embedded region of the core metal 32, the notch 44 achieves protection by allowing the deformation of the rolling wheel passing surface 36 to be absorbed.

That is, the member is protected on the core metal 32 while allowing the notch 44 to absorb the deformation of the member constituting the rolling wheel passing surface 36.

Further, when the pressing force is received from the rolling wheels on the rolling wheel passing surface 36 on which the core metal 32 is directly below, the pressing force is applied because the contact surface 42c of the lugs 42a and 42b does not exist directly below. The lugs 42a and 42b adjacent to each other in the circumferential direction of the crawler body are dispersed in the oblique direction, and the concentration of pressing force is avoided.

Further, since the core metal 32 has a small circumferential width of the crawler body and a small length of the wing portion extending in the width direction, the weight of the rubber crawler 30 can be reduced, and the core metal 32 and the lug Since there is no overlap of the 42a and 42b with the ground contact surface 42c in the thickness direction, the bending rigidity of the crawler body can be reduced.

According to the rubber crawler of the second embodiment of the present invention, when traveling on a relatively soft ground such as a rice field, a wheel wheel that adopts a core metal lug structure and does not have a core metal 32 directly underneath. Since a notch 44 is formed on the passing surface 36 at the outer edge portion in the width direction, the members constituting the rolling wheel passing surface 36 due to the pressing force when passing the rolling wheels are deformed in the space of the notch 44. It is tolerated and effectively prevents the occurrence of edge scratches on the wheels. Further, it is possible to prevent an increase in the pressing force per unit area on the rolling wheel passing surface between the rolling wheel and the core metal 32, and to avoid partial damage such as so-called worm-eaten. As a result, the life of the rubber crawler can be extended.

Further, as described above, the configuration in which the notch portion 44 and the core metal 32 do not overlap and the configuration in which the core metal 32 and the ground contact surface 42c of the lug do not overlap do not mean complete non-overlapping. Even if some overlap occurs, the action of each of the above embodiments can be achieved.

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 when traveling on a hard ground and when traveling on a soft ground is shown, but the present invention is not limited thereto. Further, the shape of the notch may be any other shape as long as the width of the rolling wheel passing surface is reduced. For example, the notch may be triangular, rectangular or trapezoidal. In particular, if it is formed in a curved shape, it is more preferable that cracks are less likely to occur as compared with the case of a rectangle or the like.

10, 30, 46 Rubber crawlers 12, 32, 48 Core metal 14, 34, 50 Guide protrusions 16, 36, 52 Rolling wheel passage surfaces 18, 38, 54 Inner peripheral surface of the crawler body 20, 40, 56 Outer surface 22, 42a, 42b, 58 Rug 22a, 42c Rug contact patch 24, 44 Notch 26 Rolling wheel 28 Recess

Claims (5)

A rubber having an endless band-shaped crawler body, lugs formed on the outer peripheral surface of the crawler body at predetermined intervals, and a wheel passing surface through which the wheels provided on the inner peripheral surface of the crawler body pass. In the crawler
The rolling wheel passing surface is
A notch is provided at the outer edge of the crawler body on the rolling wheel passing surface in the width direction so that the width of the rolling wheel passing surface is smaller than the width of the rolling wheel, and the notch is provided with the crawler. A rubber crawler characterized in that a plurality of crawlers are provided at predetermined intervals in the circumferential direction of the main body. A core metal is embedded in the crawler body at predetermined intervals in the circumferential direction of the crawler body so that both left and right wings of the crawler body extend in the width direction of the crawler body.
The formed region of the notch 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 body. The formed region of the notch is
It is a region of the inner peripheral surface facing the region where the lug exists, and is
The rubber crawler according to claim 2, wherein in the region where the rolling wheel passing surface exists, the core metal and the ground contact surface region of the lug are arranged so as not to overlap in the thickness direction. The lag is
The crawler body is inclined and extends in a direction orthogonal to the circumferential direction, one end is a region overlapping the region where the rolling wheel passing surface exists in the thickness direction, and the other end is said. The rubber crawler according to claim 3, wherein the rubber crawler is formed on the outer peripheral surface of a region that overlaps with an installation region of one end of a core metal adjacent to each other in the circumferential direction of the crawler body in the thickness direction. The outer peripheral surface of the crawler body extends in the width direction to the edge of the crawler body in a region between the other ends of the lugs adjacent to each other in the circumferential direction of the crawler body and in which the core metal does not exist. The rubber crawler according to claim 4, wherein a recess is formed.

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