JP6438229B2 - Rubber crawler - Google Patents

Description

  The present invention relates to a rubber crawler.

A rubber crawler is widely used as a traveling part of a work vehicle used for construction / civil engineering work or agricultural work. The rubber crawler is wound around a driving wheel installed on one end side of a crawler frame equipped on the work vehicle and an idler wheel installed on the other end side.
This rubber crawler usually has an endless belt-like crawler body made of an elastic member such as rubber, with a core metal embedded at a predetermined interval in the circumferential direction of the crawler body. It has a plurality of lugs protruding at a predetermined interval in the circumferential direction of the main body.

By the way, most of the construction / civil engineering / agricultural work sites are unprepared places, paddy fields, fields, etc., and muddy areas are included. It was inevitable.
Corresponding to such a situation, for example, a rubber crawler (see Patent Document 1) that can ensure excellent soil gripping and soil removal properties by forming a large recess formed between lugs adjacent in the crawler body circumferential direction. ) Has been proposed.

JP 2011-46276 A

However, if dirt or mud adhering to the rubber crawler cannot keep up with the rubber crawler and soil or mud remains in the recesses between adjacent lugs, the dirt or mud is There is a risk that it will continue to adhere to the surface of the crawler body between adjacent lugs and remain in the recess as it is.
SUMMARY OF THE INVENTION An object of the present invention is to provide a rubber crawler that can induce soil or mud remaining in a recess between adjacent lugs to separate from the surface of the crawler body.

In order to achieve the above object, the rubber crawler according to the present invention is distributed to the outer peripheral surface of an endless belt-like crawler body made of an elastic material on both sides of the center portion in the crawler body width direction, and is inclined with respect to the crawler body width direction. extending lugs, in the rubber crawler in which a plurality arranged at predetermined intervals in the crawler body peripheral direction, in a region between said lug between said crawler body, forming a height difference of the outer peripheral surface at the crawler body width direction A step portion is provided in a direction not parallel to the extending direction of the lug, and the step portion extends in the crawler body width direction and is shifted in the crawler body circumferential direction without being continuous in the crawler body width direction. It is characterized by that. According to the rubber crawler of the present invention, even when soil or mud remains in the recess between adjacent lugs due to the deformation of the outer peripheral surface based on the height difference in the crawler main body, Mud or the like can be induced to separate from the surface of the crawler body without being attached to the surface of the crawler body while the rubber crawler is traveling.

  In the rubber crawler according to the present invention, it is preferable that a plurality of the step portions are provided between the lugs adjacent in the circumferential direction of the crawler body. According to this configuration, it is possible to more effectively induce soil and mud remaining in the recesses between the adjacent lugs in the circumferential direction of the crawler main body, which tends to remain, to be detached from the surface of the crawler main body.

  In the rubber crawler according to the present invention, it is preferable that the step portion is disposed inside a crawler body width direction end of a core metal embedded in the crawler body. According to this structure, since the core metal which is a rigid body is embedded, the crawler is not easily deformed even when it is wound, and it is difficult for soil and mud to be detached. It is possible to more effectively induce mud and the like to detach from the surface of the crawler body.

The rubber crawler of the present invention, the step forming face forming the step of the step portion is inclined with crawler body width Direction, it is preferable. According to this configuration, it is possible to further effectively induce soil and mud to be detached from the outer surface of the crawler body during the running of the rubber crawler.

  According to the present invention, it is possible to provide a rubber crawler that can induce soil or mud remaining in a recess between adjacent lugs to be detached from the surface of the crawler body.

It is the fragmentary top view which looked at the rubber crawler which concerns on one embodiment of this invention from the outer peripheral surface side. It is the fragmentary top view which looked at the rubber crawler which concerns on one embodiment of this invention from the inner peripheral surface side. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. The traveling state of a rubber crawler is shown, (a) is explanatory drawing of the linear traveling state of a crawler main body, (b) is explanatory drawing of the curved traveling state of a crawler main body.

Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a partial plan view of a rubber crawler according to an embodiment of the present invention viewed from the outer peripheral surface side. FIG. 2 is a partial plan view of the rubber crawler in FIG. 1 as viewed from the inner peripheral surface side. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG. 5A and 5B show the running state of the rubber crawler, where FIG. 5A is an explanatory view of the crawler main body in a straight running state, and FIG. 5B is an explanatory view of the crawler main body in a curved running state.
As shown in FIGS. 1 to 3, the rubber crawler 10 according to the present embodiment is generally composed of an endless belt-like crawler body 11 made of an elastic material such as rubber, and the crawler over the entire outer circumference 11 a side of the crawler body 11. A plurality of lugs 12 are arranged at predetermined intervals in the circumferential direction of the main body.

This rubber crawler 10 is used as a traveling part of a work vehicle used for construction / civil engineering work, agricultural work, etc., and is installed on one end side of a crawler frame equipped on a work vehicle (not shown) and on the other end side. It is wrapped around the idler wheel. A plurality of wheels are installed between the drive wheel and the idler wheel.
The crawler main body 11 has a core metal 13 extending in the crawler main body width direction at a predetermined interval in the crawler main body circumferential direction. It is embedded to protrude to the peripheral surface side (see FIG. 3).

  The lugs 12 are distributed to both sides of the central portion in the crawler body width direction over the entire outer peripheral surface 11a side of the crawler body 11 and extend inclined with respect to the crawler body width direction. A plurality are arranged at intervals. That is, the lug 12 is formed so as to protrude from the outer peripheral surface 11a having a ground contact surface (tread surface) made of a substantially rectangular flat surface at the top together with an inclined wall narrowing as it goes upward (see FIGS. 1 and 3). ). The lug 12 is opposed to the crawler body width direction on both sides of the crawler body width direction with a gap, and from the center portion in the crawler body width direction with respect to the crawler body width direction line W passing through the center side end of the lug 12. It arrange | positions in the inclination state which a separation distance expands to an edge part (refer FIG. 1), and is extended from the center part vicinity of the crawler main body width direction to the outer side vicinity of the outer end of the metal core 13 (FIGS. 1 and 3). reference). Further, the outer ends in the crawler main body width direction of the lugs 12 arranged every other one in the circumferential direction of the crawler main body extend substantially parallel to the crawler main body width direction line W and reach the side of the crawler main body 11 ( (See FIG. 1).

As a result, a pair of lugs 12 arranged in a C-shape that spreads toward the backward direction of the rubber crawler 10 when mounted on the work vehicle (downward on the paper surface in FIG. 1) are disposed on the outer peripheral surface 11a of the crawler body 11. A plurality of the crawler bodies are arranged at predetermined intervals in the circumferential direction of the crawler body (see FIG. 1). Note that the direction in which the lugs 12 are arranged is not limited to the C-shape spreading toward the rearward direction of the rubber crawler 10 described above, and may be a C-shape spreading toward the rearward direction of the rubber crawler 10 in the opposite direction.
An area a between the lugs 12 adjacent in the crawler body width direction and between the lugs 12 adjacent in the crawler body circumferential direction has an outer peripheral surface of the crawler body 11 in both the crawler body circumferential direction and the crawler body width direction. A stepped portion 14 is provided that forms a height difference (step) of 11a (see FIG. 1).
The height difference formed by the stepped portion 14 is set to, for example, 10% to 30% or 3 mm to 10 mm of the main body thickness t based on the main body thickness t (see FIG. 3) of the crawler main body 11. When all of the height differences formed by the step portion 14 are located on the outer peripheral surface 11a of the crawler body 11 (see FIG. 3), the height from the outer peripheral surface 11a to the step portion 14 is formed by the step portion 14. It becomes a height difference.
In addition, not all of the height difference formed by the step portion 14 is exposed on the outer peripheral surface 11a of the crawler body 11 (see FIG. 3), but approximately half of the height difference is located below the outer peripheral surface 11a, Alternatively, some or all of the height differences may be located below the outer peripheral surface 11a, that is, inside the crawler main body 11, such that all the height differences are located below the outer peripheral surface 11a.

  As shown in FIGS. 1, 3, and 4, the stepped portion 14 includes a portion extending in the crawler body width direction and a portion extending along the crawler body circumferential direction. The four step portions 14 extending in the crawler body circumferential direction are arranged at four positions in the crawler main body circumferential direction between the lugs 12 adjacent to each other in the crawler main body circumferential direction. The stepped portion 14 extending in the crawler body width direction center is continuous in a row in the entire crawler body circumferential direction, and the lug 12 is formed at two lateral sides on both sides of the crawler body width direction. It is continuously arranged in a row while being divided into two pieces (see FIG. 1).

Further, the stepped portion 14 is formed such that the adjacent interval in the crawler body circumferential direction is shorter than the maximum length of the lug 12 in the crawler body circumferential direction, and is inclined in the direction opposite to the inclination direction of the lug 12 with respect to the crawler body width direction line W. The crawler body width direction line W is inclined so as to be in the direction, and occupies a central portion of the entire width of the crawler body 11 divided into approximately three equal parts (see FIG. 1).
The step portion 14 is formed as a connecting portion of continuous step forming surfaces 14a, and the step forming surface 14a is a backward direction of the rubber crawler 10 when the work vehicle is mounted (in FIG. 1, the downward direction on the paper surface, and in FIG. 4, the left surface of the paper surface). Direction) from the rear, the slope from which the height from the outer peripheral surface 11a of the crawler body 11 becomes higher (see FIG. 4), and from the outer side than the center in the crawler width direction from the outer peripheral surface 11a of the crawler main body 11 It has an inclination in two directions with an inclination that increases in height (see FIG. 3).

That is, the step portion 14 forms a repeated inclination in the crawler circumferential direction and a repeated inclination in the crawler width direction, and the repeated inclination in the crawler width direction is the same direction, that is, the crawler width in the entire crawler width direction. The direction of inclination is asymmetrical with respect to the center of the direction (see FIG. 3). The inclination direction of the step forming surface 14a is not limited to the inclination (see FIG. 3) in which the height from the outer peripheral surface 11a of the crawler main body 11 is higher on the outer side than the center in the crawler width direction, and the opposite inclination. The inclination from which the height from the outer peripheral surface 11a of the crawler main body 11 becomes higher in the center than the outer side in the crawler width direction.
This step forming surface 14a is continuous in the crawler main body circumferential direction and the crawler main body width direction to form a stepped portion 14 (see FIG. 1), so that the tooth shape of a saw that repeatedly inclines in the crawler main body circumferential direction and the crawler main body width direction. A pattern is formed (see FIGS. 3 and 4).

The rubber crawler 10 of the present embodiment has a sawtooth pattern formed by the stepped portion 14, so that the outer surface 11 a of the crawler main body 11 in the region a between the adjacent lugs 12 is placed on the crawler main body periphery. The plurality of step portions 14 are arranged in the direction and the width direction of the crawler body, and the rubber crawler 10 is wound around the driving wheel and the idler wheel of the work vehicle, so that the rubber crawler 10 is curved in an arc shape.
By curving the rubber crawler 10, it is possible to induce the removal of soil, mud, and the like from the outer surface 11a of the crawler main body 11.

That is, as shown in FIG. 5, when the rubber crawler 10 travels, the crawler main body 11 serves as a driving wheel for the adhering matter M such as soil and mud adhering to the outer surface 11 a of the region a between adjacent lugs 12. When the crawler main body 11 is in a curved traveling state around the drive wheel or idler wheel, it remains attached when it is in a linear traveling state located between the idler wheels (see (a)). Peel off (see (b)). This is because when the crawler main body 11 is wound, the crawler main body 11, that is, the stepped portion 14 and the step forming surface 14 a are deformed in an arc shape when viewed from the side, and the stepped portion 14 and the step formed surface 14 a and the deposit M This is because a gap S is generated in the gap (see arrow (b)), and the gap S propagates between the gap S and the deposit M. Therefore, even when the deposit M remains in the recesses between the adjacent lugs 12, the deposit M is separated from the outer surface 11a while the rubber crawler 10 is traveling, and the deposit M becomes the crawler main body 11. It does not continue to adhere to the outer surface 11a.
The curving of the rubber crawler 10 can induce the deposit M to be detached from the outer surface 11a of the crawler body 11 because all the height differences formed by the step portions 14 are In addition to the case where it is exposed on the outer peripheral surface 11a (see FIG. 3), a part of the height difference is such that approximately half of the height difference is located below the outer peripheral surface 11a or all of the height differences are located below the outer peripheral surface 11a. Alternatively, the same applies to the case where the entirety is located under the outer peripheral surface 11a, that is, inside the crawler main body 11. The step 14 has a function of inducing the attachment M to be detached from the outer surface 11a. The so-called mudiness is such that all the height differences formed by the step 14 are on the outer peripheral surface 11a of the crawler body 11. It is the highest in the case where it is located next, and next, when almost half of the height difference is located below the outer peripheral surface 11a, next, all the height differences are lowered in the order in which they are located below the outer peripheral surface 11a.

As described above, in the present embodiment, the stepped portion 14 provided in the region a between the adjacent lugs 12 causes the height of the outer peripheral surface 11a of the crawler body 11 in both the crawler body circumferential direction and the crawler body width direction. Although the difference is formed, the present invention is not limited to this, and the outer peripheral surface of the crawler main body 11 is formed only in the crawler main body circumferential direction so as to form the height difference of the outer peripheral surface 11a of the crawler main body 11 or only in the crawler main body width direction. The step portion 14 may be provided so as to form a height difference of 11a. That is, the step portion 14 may be provided so as to form a height difference of the outer peripheral surface 11a of the crawler body 11 at least in one of the crawler body circumferential direction and the crawler body width direction.
And the level | step-difference part 14 is a direction which is not parallel to the extension direction of the lug 12, ie, the direction which is not parallel to the inclination direction of the lug 12 with respect to the crawler main body width direction line W (refer FIG. 1), for example, a crawler main body width direction. The crawler body width direction line W is provided so as to be inclined in a direction opposite to the inclination direction of the lug 12 with respect to the line W.

By having such a configuration, it is possible to induce soil or mud remaining in the recesses between the adjacent lugs 12 to be detached from the surface of the crawler main body, and further, the stepped portion 14 is made to extend the lugs 12. By providing it in a direction that is not parallel to the current direction, it is possible to more effectively induce detachment of the soil or mud from the surface of the crawler body.
In addition, by providing a plurality of stepped portions 14 between the lugs 12 adjacent in the crawler body circumferential direction, in particular, in the crawler body circumferential direction, dirt or mud remaining in the recesses between the adjacent lugs, It can be more effective to induce separation from the surface of the crawler body.
The stepped portion 14 is formed such that the adjacent interval in the circumferential direction of the crawler body is shorter than the length of the lug 12 in the circumferential direction of the crawler body. Thereby, the region a between the adjacent lugs 12 is finely divided. The soil, mud, and the like attached to the outer surface 11a of the crawler body 11 in the region a between the adjacent lugs 12 can be more easily peeled off.

In addition, as for the division | segmentation of the area | region a between adjacent lugs 12, it is more preferable to divide between the lugs 12 adjacent in the crawler main body circumferential direction from 1/10 to 1/2. By dividing from 1/10 to 1/2, it is possible to provide more sufficient mud repellency that allows soil, mud, etc. to be detached from the surface of the crawler body.
The step portion 14 extending in the crawler body width direction is displaced in the crawler body circumferential direction without being continuous in the crawler body width direction between the adjacent step portions 14. The soil, mud, etc. adhering to can be made easier to peel off.

  Moreover, since the level | step-difference part 14 is arrange | positioned inside the crawler main body width direction end 13a of the core metal 13 embed | buried under the crawler main body 11, the core metal 13 from which dirt, mud, etc. are easy to detach | leave from the crawler main body surface in the first place. In comparison with the outside of the metal core 13, it is possible to more effectively induce the separation of the soil, mud, and the like from the surface of the crawler body even in the inner portion of the cored bar 13 where it is difficult for the soil, mud, etc. to be detached.

  In the present embodiment, the step forming surface 14a of the stepped portion 14 forms a sawtooth pattern that repeatedly inclines in the crawler body circumferential direction, but is not limited to this, for example, in the crawler body circumferential direction. A stepped pattern in which unevenness due to the step forming surface 14a made of a flat surface is repeated may be used. In the sawtooth pattern, the slopes of the respective slopes may be the same or different. In the stepped pattern, the height difference of the unevenness may be the same or different. In other words, the outer peripheral surface 11a of the crawler body 11 only needs to have a configuration that causes a height difference in the circumferential direction of the crawler body. The soil, mud, etc. adhering to the outer surface 11a of the crawler main body 11 forming the region a between the twelve can be more easily peeled off.

Further, the step forming surface 14a that forms the stepped portion 14 is configured so that the backward direction of the rubber crawler 10 when the work vehicle is mounted (downward on the paper surface in FIG. 1 and leftward on the paper surface in FIG. 4) is forward from the rear side of the crawler body 11. There are two inclinations: an inclination that increases the height from the outer peripheral surface 11a (see FIG. 4), and an inclination that increases the height from the outer peripheral surface 11a of the crawler body 11 to the other of the left and right sides in the crawler width direction. Although it has an inclination in the direction, it is not necessarily limited to one having an inclination in two directions. The step forming surface 14a only needs to be inclined in at least one of the crawler body circumferential direction and the crawler body width direction, and if the step forming surface 14a is inclined in at least one of the crawler body 11 adjacent lugs 12 between Soil, mud, etc. adhering to the outer surface 11a of the crawler main body 11 forming the region a between them can be more easily peeled off, and dirt, mud, etc. from the outer surface of the crawler main body 11 while the rubber crawler 10 is running. Can be more effectively triggered.
Note that the inclination of the step forming surface 14a with respect to the traveling direction of the rubber crawler 10 when the work vehicle is mounted is not limited to the inclination in which the front in the backward direction is higher from the rear than the outer peripheral surface 11a of the crawler body 11 from the rear. However, the backward direction backward inclination, which is the reverse inclination, may be an inclination in which the height from the outer peripheral surface 11a of the crawler body 11 is higher than the front direction. Soil, mud, etc. adhering to the surface 11a can be more easily peeled off. In particular, when the forward direction of the backward movement is inclined so that the height from the outer peripheral surface 11a of the crawler main body 11 is higher than the rear (see FIG. 4), the soil or mud adhering to the outer surface 11a of the crawler main body 11 is lifted up. Since the action is reduced, it is more preferable.

  Thus, the rubber crawler 10 of the present embodiment is provided with the step portion 14 that forms the height difference (step) of the outer peripheral surface 11a of the crawler body 11 in the region a between the adjacent lugs 12. Even when soil or mud remains in the recesses between adjacent lugs 12, the crawler body does not continue to adhere to the outer surface of the crawler body 11 while the rubber crawler 10 is traveling. 11 can be induced to disengage from the outer surface. For this reason, when the rubber crawler 10 is wound around the driving wheel and the idle wheel and is in a running state, dirt, mud, and the like can be effectively separated from the outer surface of the crawler body 11, so that the lug 12 It is possible to prevent a decrease in the traction force of the rubber crawler 10 that occurs when soil or mud is clogged between the lugs 12, and the surroundings of the farm field or the like due to soil or mud adhering to the outer surface of the crawler body 11. The traveling path of the rubber crawler 10 is not soiled.

10 rubber crawler, 11 crawler body, 11a outer surface, 12 lug,
13 cored bar, 13a end of crawler body width direction of cored bar, 14 stepped part, 14a stepped surface, a region between adjacent lugs

Claims (4)

A plurality of lugs that are distributed on the outer peripheral surface of the endless belt-like crawler body made of an elastic material on both sides of the central portion in the crawler body width direction and that are inclined and extend with respect to the crawler body width direction at a predetermined interval in the crawler body circumferential direction. In the placed rubber crawler,
In a region between said lug between said crawler body, a stepped portion forming a height difference of the outer peripheral surface at the crawler body width Direction, provided in a direction which is not parallel to the extending direction of said lug,
A rubber crawler in which the stepped portion extends in the crawler body width direction and is displaced in the crawler body circumferential direction without being continuous in the crawler body width direction .   The rubber crawler according to claim 1, wherein a plurality of the step portions are provided between the lugs adjacent in the crawler body circumferential direction.   The rubber crawler according to claim 1, wherein the stepped portion is disposed inside a crawler body width direction end of a core metal embedded in the crawler body. Step forming face forming the step of the stepped portion, a rubber crawler according to claims 1 which is inclined by crawler body width direction toward the any one of 3.

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