JP4451686B2 - Rubber crawler - Google Patents

Description

  The present invention relates to an endless belt-like rubber crawler used for an infinite traveling device such as a construction machine or an agricultural machine.

  A rubber crawler is equipped with an endless belt-shaped crawler body made of a rubber material. Compared with an iron crawler, it has lower noise, better riding comfort, higher road surface protection, lighter weight, and lower cost. It is widely used because it has advantages such as Such a rubber crawler is used by being wound around a wheel such as a driving wheel or a driven wheel of an infinite traveling device. Therefore, in order to prevent the wheel from being removed from the width direction of the belt, A guide protrusion is often formed along the longitudinal direction (see, for example, Patent Document 1).

JP 2000-326878 (3rd page, FIG. 1)

  However, in the above technique, the guide protrusion is formed directly above the non-ground surface side of the core metal, and both the core metal and the guide protrusion are arranged at the same pitch, so that the rollers are displaced in the band width direction. In such a case, there is a problem that the guide projection is deformed in the band longitudinal direction (the circumferential direction of the rubber crawler) or in the band width direction (the width direction of the rubber crawler) and is easily removed.

  Specifically, as shown in FIGS. 12 and 13, a core metal 2 and a steel cord (stretch body) 3 are embedded in a crawler body 1 made of a rubber material, and just below the grounding surface side of the core metal 2. The lug 4 protrudes integrally with the crawler main body 1, and the rubber crawler in which the guide protrusion 5 made of rubber material protrudes integrally with the crawler main body 1 directly above the non-ground surface side of the core metal 2 is infinite. When used by being wound around a roller wheel T (indicated by a two-dot broken line in the figure) of the traveling device, in a normal state, the roller wheel T has a band length at both ends of the rubber crawler inner peripheral surface in the band width direction. It rolls between the guide projections 5 and 5 made of rubber material protruding along the direction. However, when the infinite traveling device is traveling on rough terrain (land with unevenness where stones and the like are scattered), the rolling wheel T suddenly stops rolling between the guide protrusions 5 and 5, for example, The rolling wheels T ride on the side of the guide projection 5 on one side in the longitudinal direction of the belt (see FIG. 12) or ride on the side of the guide projection 5 on one side in the width of the belt (see FIG. 13). Then, when the wheel T rides on in this way, the guide protrusion 5 is formed of a rubber material, so that the guide protrusion 5 is like a guide protrusion 5a or a guide protrusion 5b indicated by a two-dot broken line. As a result, the wheel T is removed from the guide protrusion 5a and the guide protrusion 5b.

In order to solve such a problem, it is conceivable to form the guide protrusion 5 using a material having high rigidity such as a metal material. However, in this case, there is a difficulty in reducing the weight and cost of the rubber crawler itself. Not necessarily the best solution.
The present invention has been made in view of such circumstances, and an object thereof is to provide a rubber crawler capable of effectively suppressing the guide protrusion from being largely deformed.

The rubber crawler of the present invention includes a crawler main body made of a rubber material formed in an endless belt shape, a plurality of core bars embedded in parallel inside the crawler main body, and a ground surface side of the crawler main body in parallel. A rubber crawler comprising a plurality of protruding lugs and a plurality of guide protrusions protruding in parallel on the non-ground surface side of the crawler body, wherein each guide protrusion is made of a rubber material. together they are formed, Ri Na is formed so as to satisfy the equation (1) below, the metal core, the are embedded in a state not exposed from the inside crawler body, wherein the guide protrusions band longitudinal A plurality of core bars are arranged in the direction, and the core bars are respectively located immediately below the roots of both ends of the guide protrusions in the longitudinal direction of the band .

S-2H ≦ G ≦ 4/5 × P (1)
[In Formula (1), G is the length of the guide protrusion in the longitudinal direction of the band, P is the distance between the centers of the guide protrusions adjacent in the longitudinal direction of the band, and H is the length of the core bar in the width direction. Yes, S is the distance between one end in the width direction of the cored bar and the other end in the width direction of the cored bar adjacent to the cored bar. ]

According to the above configuration, the guide projections of the rubber material is formed so as to satisfy the formula (1), and position the metal core, respectively directly under the root of the strip longitudinal direction both end portions of the guide projections ing. For this reason, even if the rolling wheel which rolls between each guide projection part runs on a guide projection part, a metal core can function as a stopper with respect to a deformation | transformation of a guide projection part. Therefore, while being a rubber crawler that can be reduced in weight and cost, the guide protrusions are not greatly deformed even when the wheel rides on, and it is possible to effectively suppress the wheel from coming off. Can do.

  In the rubber crawler, the plurality of core bars may be embedded in parallel at equal intervals in the longitudinal direction of the band, and the plurality of core bars are irregularly spaced and regular in the longitudinal direction of the band. It can be set as the structure embed | buried in parallel with a sufficient space | interval. Here, “non-uniform and regular intervals” means that the cores are not equally spaced but are arranged in parallel at a predetermined regular interval. For example, the intervals between the cores are in order. Short distance, long distance, short distance, long distance, and so on.

In the rubber crawler in which the metal cores are embedded in parallel at irregular intervals and regular intervals, the distance between the centers of the guide protrusions adjacent in the longitudinal direction of the belt is P, the metal core and the metal core adjacent to the metal core P1 and P2 are different numerical values, and the sum of the numerical value of P1 and the numerical value of P2 is P. It is preferable to make the structure equal to the numerical value of.
In this case, even if the cored bar is not embedded at equal intervals, the cored bar is positioned at the lower part of the base of the end portion in the longitudinal direction of the band of the guide protruding part. It can be made to function as a stopper against deformation, and as a result, it is possible to effectively suppress the wheel from being removed.

  According to the present invention, even if the wheel suddenly rides on the guide protrusion, it is possible to effectively suppress the guide protrusion from being greatly deformed. For this reason, it is possible to effectively suppress the wheel from being removed from the deformed guide projection.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an inner plan view schematically showing a rubber crawler according to a first embodiment of the present invention, and FIG. 2 is an XX sectional view thereof. The rubber crawler K1 according to the present embodiment is used by being wound around a driving wheel or a driven wheel of an infinite traveling device such as a construction machine or an agricultural machine, and includes an endless belt-like crawler body 11 and a crawler. A cored bar 12 and a tension member 13 embedded in the main body 11, a lug 14 for generating a traction force integrally projecting on the grounding surface side (outer peripheral surface side) of the crawler main body 11, and the crawler main body 11 The non-grounding surface side (inner peripheral surface side) is provided with a guide projection portion 15 for preventing the wheel from coming off integrally.

  The crawler body 11 is formed in an endless belt shape using various rubber materials that exhibit elasticity in consideration of low noise, good riding comfort, high road surface protection, light weight, and low cost. is there. A plurality of core bars 12 are embedded in the crawler body 11 in order to increase the strength and grounding support of the rubber crawler K1. Specifically, each metal core 12 is formed, for example, in a flat bar shape (without protrusions) from a rigid material such as metal or reinforced synthetic resin, and is not exposed from the inside of the crawler body 11 in the longitudinal direction of the band (rubber It is embedded in parallel at equal intervals in the circumferential direction of the crawler K1. By arranging each cored bar 12 in such a state, the cored bar 12 itself does not exhibit the guide function of the wheel. Further, above each cored bar 12, tensile bodies 13 made of a plurality of steel cords or the like are embedded in parallel in the band width direction at predetermined intervals along the band longitudinal direction of the crawler body 11. The tensile strength with respect to the longitudinal direction of the rubber crawler K1 is increased.

  A plurality of lugs 14 extending in a straight line in the band width direction are provided on the grounding surface side of the crawler body 11 so as to protrude in parallel in the band longitudinal direction. Specifically, each lug 14 is integrally projected directly below the grounding surface side of each core metal 12, one for each core metal 12. That is, each lug 14 is integrally projected on the crawler main body 11 at equal intervals in the longitudinal direction of the band at the same pitch as each core metal 12.

On the other hand, a plurality of guide protrusions 15 made of the same rubber material as the crawler body 11 are provided on the non-ground surface side of the crawler body 11 on both ends in the band width direction. Specifically, the guide protrusions 15 are opposed to each other in the band width direction, and project integrally with the crawler body 11 at equal intervals in the band longitudinal direction. The wheels that roll between 15 are prevented from being removed.
Further, each guide projection 15 is formed in parallel along the longitudinal direction of the band above the two core bars 12 (on the grounding surface side) so as to cover two core bars 12 for each guide projection 15. ing. That is, each guide protrusion 15 is disposed across the two core bars 12 in the longitudinal direction of the band. The longitudinal length G of each guide projection 15 is P, the distance between the centers (pitch) between the guide projections 15 adjacent in the longitudinal direction of the belt, H, the length of the core 12 in the width direction, and the core. When the distance between one end in the width direction of 12 and the other end in the width direction of the core metal 12 adjacent to the core metal 12 is S, it is set to satisfy the following formula (1). Note that the length in the band width direction of each guide projection 15 is appropriately set according to a wheel or the like.
S-2H ≦ G ≦ 4/5 × P (1)

  That is, the band longitudinal direction length G of the guide projection 15 satisfies the above formula (1), so that the cored bar 12 is positioned directly below the base of the end of the guide projection 15 in the band longitudinal direction. become. Here, the reason why the longitudinal length G of the guide protrusion 15 is set to 4/5 × P or less is that the rubber crawler K1 can be attached to the wheels.

The rubber crawler K1 according to the present embodiment configured as described above has the guide protrusions 15 formed of a rubber material and has a band longitudinal length G within a specific range. Even if a wheel rides on each guide projection 15, it does not deform greatly, so that it is possible to effectively prevent the wheel from being removed.
Specifically, referring to FIG. 3, when the rolling wheel T that rolls on the inner peripheral side of the rubber crawler K1 rides on the guide protrusion 15 from the longitudinal direction of the belt, the guide protrusion 15a (indicated by a two-dot broken line) Will be deformed. However, in the rubber crawler of the present embodiment, the cored bar 12 is disposed below the guide projection 15 (on the grounding surface side), more specifically, directly below the root of the end of the guide projection 15 in the longitudinal direction of the band. Therefore, the core metal 12 works to resist the force acting from the wheel T, and the guide projection 15 can be strung more than before. For this reason, the deformation | transformation of the guide projection part 15 can be suppressed largely compared with the past. Therefore, even if the guide protrusion 15 itself is made of a rubber material that does not have rigidity such as metal, it is possible to effectively prevent the wheel T from being removed.
Moreover, since the rubber crawler K1 of this embodiment is formed from a rubber material, it has the advantage that weight reduction and cost reduction can be achieved. That is, the rubber crawler K1 of the present embodiment can effectively suppress the guide protrusion 15 from being greatly deformed while securing the weight reduction and the cost reduction that are the advantages of a general rubber crawler. .

(Second Embodiment)
FIG. 4 is a plan view of the inner circumference side showing a rubber crawler according to the second embodiment of the present invention. The rubber crawler K2 according to this embodiment is different from the first embodiment in that the guide protrusions 15 located on both ends in the band width direction are arranged in a staggered manner. That is, the rubber crawler K2 of the present embodiment is configured such that the guide protrusion 15 on one end side in the band width direction and the guide protrusion 15 on the other end side in the band width direction are shifted by one core bar 12 and each is crawler body at the same pitch. 11 is arranged on the inner peripheral surface side. Each guide protrusion 15 is formed to satisfy the above formula (1). Even in such a configuration, similarly to the first embodiment, even if the wheel T rides on the guide projection 15, it does not greatly deform, and therefore, the wheel can be effectively prevented from being removed.

(Third embodiment)
FIG. 5 is a plan view of the inner periphery schematically showing a rubber crawler according to the third embodiment of the present invention, and FIG. 6 is a YY sectional view thereof. The rubber crawler K3 according to the present embodiment is different from the first embodiment in that the metal cores 12 are arranged at regular intervals inside the crawler body 21 although they are not equally spaced.
Specifically, the intervals between the core bars 12 are made regular by repeating short distances, long distances, short distances,... Then, one lug 24 is integrally protruded from the crawler main body 21 below the portion (the grounding surface side) arranged so that the distance between the two core bars 12 is a short distance. Further, above the portion (the non-grounding surface side) arranged so that the distance between the two core bars 12 is a short distance, the guide protrusions 25 are integrally projected so as to face each other on both sides in the band width direction. I have to. And each guide projection part 25 is formed so that the said Numerical formula (1) may be satisfy | filled similarly to 1st Embodiment. Furthermore, when the distance between the two core bars 12 is short and P1 is the distance when the two core bars 12 are long, the sum of P1 and P2 is the guide protrusion adjacent to the belt longitudinal direction. 25 so as to be equal to the center-to-center distance P.

  In the rubber crawler K3 according to the present embodiment configured as described above, each guide projection 25 is formed of a rubber material, and each guide projection 25 is formed to satisfy a specific relationship. The cored bar 12 is positioned immediately below the base of the end portion in the longitudinal direction of the guide protrusion 25. For this reason, similarly to the first embodiment, even if the wheel rides on the guide protrusion 25, it does not greatly deform, and therefore, the wheel can be effectively prevented from being removed.

(Fourth embodiment)
FIG. 7 is an inner plan view schematically showing a rubber crawler according to a fourth embodiment of the present invention, and FIG. 8 is a ZZ sectional view thereof. In the rubber crawler K4 according to the present embodiment, each guide protrusion 35 is positioned above the three cored bars 12 (on the non-grounding surface side) as compared with the first embodiment. It is different in that it does. Even with such a configuration, as in the first embodiment, even if a wheel rides on the guide protrusion 35, it does not deform significantly, and therefore, the wheel can be effectively prevented from being removed.

(Fifth embodiment)
FIG. 9 is a plan view of the inner circumference side showing a rubber crawler according to a fifth embodiment of the present invention. The rubber crawler K5 according to the present embodiment is different from the fourth embodiment in that the guide protrusions 35 located on both ends in the band width direction are arranged in a staggered manner. That is, the rubber crawler K5 of the present embodiment shifts the guide protrusion 35 on one end side in the band width direction and the guide protrusion 35 on the other end side in the band width direction by one core bar, and guides the guide protrusion 35 at the same pitch. The part 35 is arranged on the inner peripheral surface side of the crawler main body 31. Even with such a configuration, as in the first embodiment, even if a wheel rides on the guide projection 35, it does not deform greatly, and therefore, the wheel can be effectively prevented from being removed.

(Sixth embodiment)
FIG. 10 is a plan view of the inner circumference side showing a rubber crawler according to the sixth embodiment of the present invention. The rubber crawler K6 according to this embodiment is different from the fourth embodiment in that guide protrusions 35 are formed in a line along the longitudinal direction of the belt in the center of the crawler body 11 in the width direction of the belt. Even with such a configuration, as in the first embodiment, even if a wheel rides on the guide protrusion 35, it does not deform greatly, and therefore, the wheel can be effectively prevented from being removed. In addition, the rubber crawler K6 of the present embodiment does not greatly deform even when a roller rides on the guide protrusion 35 from the band width direction.

(Seventh embodiment)
FIG. 11 is a plan view of the inner peripheral side showing a rubber crawler according to a seventh embodiment of the present invention. The rubber crawler K7 according to the present embodiment differs from the first embodiment in that the guide protrusions 15 are formed in a line along the longitudinal direction of the belt in the center of the crawler body 11 in the width direction of the belt. Even with such a configuration, as in the first embodiment, even if a wheel rides on the guide projection 15, the wheel does not deform greatly, and therefore, the wheel removal can be effectively suppressed. Further, the rubber crawler K6 according to the present embodiment does not greatly deform even when the roller rides on the guide protrusion 15 from the band width direction.

  The present invention is not limited to the above embodiment. For example, guide protrusions may be formed on the inner peripheral surface side of the crawler body so as to form three rows in the band width direction (both ends and the center in the band width direction). Further, the present invention is not limited to a mode in which two or three core bars are arranged immediately below one guide protrusion, and one guide protrusion may be formed immediately above a larger number of core bars. However, it is preferable to form the guide protrusions directly on the two or three cores in consideration of the mounting property of the rubber crawler.

It is an inner peripheral side top view of the rubber crawler which concerns on the 1st Embodiment of this invention. It is XX sectional drawing of the rubber crawler shown in FIG. FIG. 3 is a band longitudinal cross-sectional view for explaining the anti-wheel-release property of the rubber crawler shown in FIG. It is an inner peripheral side top view of the rubber crawler which concerns on the 2nd Embodiment of this invention. It is an inner peripheral side top view of the rubber crawler which concerns on the 3rd Embodiment of this invention. It is YY sectional drawing of the rubber crawler shown in FIG. It is an inner peripheral side top view of the rubber crawler which concerns on the 4th Embodiment of this invention. It is ZZ sectional drawing of the rubber crawler shown in FIG. It is an inner peripheral side top view of the rubber crawler which concerns on the 5th Embodiment of this invention. It is an inner peripheral side top view of the rubber crawler which concerns on the 6th Embodiment of this invention. It is an inner peripheral side top view of the rubber crawler which concerns on the 7th Embodiment of this invention. It is a band longitudinal direction sectional view for explaining modification of a guide projection part of a conventional rubber crawler in the band longitudinal direction. It is a band width direction sectional view for explaining modification of the guide projection part of the conventional rubber crawler in the band width direction.

Explanation of symbols

11 Crawler Body 12 Core Bar 13 Tensile Body 14 Lug 15 Guide Projection K1 Rubber Crawler

Claims (4)

A crawler body made of rubber material formed in an endless belt shape, a plurality of metal cores embedded in parallel inside the crawler body, and a plurality of lugs protruding in parallel on the grounding surface side of the crawler body And a rubber crawler comprising a plurality of guide protrusions protruding in parallel to the non-ground surface side of the crawler body,
Wherein the guide protrusions, with is formed by a rubber material, Ri Na is formed so as to satisfy the equation (1) below,
The cored bar is embedded without being exposed from the inside of the crawler body,
Each of the guide protrusions is arranged across a plurality of core bars in the longitudinal direction of the band, and the core bars are respectively located immediately below the bases of both ends of the longitudinal direction of the guide protrusions. Rubber crawler.
S-2H ≦ G ≦ 4/5 × P (1)
[In Formula (1), G is the length of the guide protrusion in the longitudinal direction of the band, P is the distance between the centers of the guide protrusions adjacent in the longitudinal direction of the band, and H is the length of the core bar in the width direction. Yes, S is the distance between one end in the width direction of the cored bar and the other end in the width direction of the cored bar adjacent to the cored bar. ]   2. The rubber crawler according to claim 1, wherein the plurality of metal cores are embedded in parallel at equal intervals in a longitudinal direction of the belt.   2. The rubber crawler according to claim 1, wherein the plurality of metal cores are embedded in parallel at regular intervals and at non-equal intervals in a band longitudinal direction.   4. The rubber crawler according to claim 3, wherein the distance between the centers of the guide protrusions adjacent to each other in the longitudinal direction of the belt is P, and the distance between the metal core and the metal core adjacent to the metal core adjacent to the metal core. P1 and P2 as the distance from the other metal core, P1 and P2 are different numerical values, and the sum of the numerical value of P1 and the numerical value of P2 is equal to the numerical value of P .

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