JP5901375B2 - Rubber crawler - Google Patents

Description

  The present invention relates to a rubber crawler.

  In recent years, endless rubber crawlers have been used in traveling parts of agricultural machines, construction machines, and civil engineering machines.

  Patent Document 1 discloses a rubber crawler in which rubber protrusions that are engaged with a driving wheel on the body side and input driving force are formed on the inner peripheral surface at regular intervals in the crawler circumferential direction. In this rubber crawler, bias codes are embedded at regular intervals in the crawler circumferential direction on the lower side (crawler outer peripheral side) between the rubber projections.

JP 2006-117063 A

By the way, in a general rubber crawler, a portion between rubber protrusions where the rubber thickness is thin (bending rigidity is low) is bent inside the crawler (bent along the outer periphery of the driving wheel) around the driving wheel. ).
However, in the rubber crawler of Patent Document 1, since the bias cord is embedded below the rubber protrusions, the rigidity between the rubber protrusions is increased and the winding resistance is increased.

  An object of this invention is to provide the rubber crawler which reduced winding resistance.

The rubber crawler according to claim 1 of the present invention is provided with an endless rubber body wound around a plurality of wheels, and a plurality of rubber crawlers provided on the circumferential surface of the rubber body at intervals in the circumferential direction of the rubber body. A rubber projection that protrudes in the circumferential direction and that abuts against the wheel and restricts the movement of the wheel in the rubber body width direction; and the rubber projection that is adjacent to each other on the circumferential surface of the rubber body. Extending along the direction and formed on the rubber body outer peripheral surface and the rubber protrusions on the both sides in the rubber body width direction adjacent to the roots of the rubber protrusions. A circumferential groove that extends in the circumferential direction of the rubber body and connects end portions in the rubber body width direction of the recessed portions adjacent to each other in the circumferential direction of the rubber body, the groove depth being shallower than the depth of the recessed portion; , Have.

  In the rubber crawler according to the first aspect of the present invention, the recesses that are recessed toward the outer peripheral side of the rubber body are formed between the adjacent rubber protrusions on the peripheral surface of the rubber body. The bending rigidity (bending rigidity that bends an endless rubber body inward or outward) at a portion between adjacent rubber protrusions of the rubber body is lower than that in which a recess is not formed between adjacent rubber protrusions. Thereby, the winding resistance when the rubber body is wound around the wheel is reduced, that is, the winding resistance of the rubber crawler is reduced.

  Further, in the rubber crawler, a recess portion that is recessed toward the rubber body peripheral side is formed between the rubber protrusions adjacent to each other on the peripheral surface of the rubber body. The amount of heat generated is reduced. Moreover, the weight of the rubber body is reduced by forming the recess.

Moreover , since the hollow part is extended in the rubber body width direction, for example, the winding resistance when the rubber body is wound around the wheel is reduced as compared with the case where the hollow part is extended in the rubber body circumferential direction. .
Further, a circumferential groove extending in the circumferential direction of the rubber body is formed adjacent to the base of the rubber protrusion on the circumferential surface of the rubber body, and ends of the recesses adjacent to each other in the circumferential direction of the rubber body in the circumferential direction of the rubber body. Since the end sides of the rubber body are lifted, the circumferential groove is deformed (elastically deformed so that the groove width is narrowed), and the boundary between the rubber protrusion and the rubber body. It is possible to suppress an excessive bending stress (bending stress in the rubber body width direction) from acting on the portion.
Further, by forming the circumferential groove in the rubber body, it is possible to reduce the winding resistance when the rubber body is wound around the wheel.

A rubber crawler according to a second aspect of the present invention is the rubber crawler according to the first aspect, wherein the recess is formed between the rubber protrusions adjacent to each other on the inner peripheral surface.

In the rubber crawler according to claim 2 of the present invention, since the depression is formed between the rubber protrusions adjacent to each other on the peripheral surface of the rubber body, the winding resistance when the rubber body is wound around the wheel is reduced. It can be effectively reduced.
Further, even when the rubber crawler is reversely bent during traveling and a tensile stress (bending stress) acts on the inner circumferential side of the rubber body between adjacent rubber protrusions of the rubber body, as described above, Since the recess is formed between the adjacent rubber protrusions, it is possible to suppress an excessive tensile stress from acting on the peripheral side of the rubber body between the adjacent rubber protrusions of the rubber body.

A rubber crawler according to a third aspect of the present invention is the rubber crawler according to the first or second aspect , wherein the recessed portion extends from between the adjacent rubber protrusions to the outside in the rubber body width direction. Yes.

In the rubber crawler according to claim 3 of the present invention, the dent portion extends from between the rubber protrusions adjacent to each other to the outside in the rubber body width direction, so that the wrapping resistance when the rubber body wraps around the wheel is reduced. Further reduction can be achieved.

A rubber crawler according to a fourth aspect of the present invention is the rubber crawler according to the first aspect, wherein a bottom of the recess is curved in an arc shape toward the outer peripheral side of the rubber body.

In the rubber crawler according to claim 4 of the present invention, since the bottom of the recess is curved in an arc shape toward the outer peripheral side of the rubber body, when the rubber body is bent inward or outward, It is possible to suppress the local concentration of stress on the bottom.
A rubber crawler according to a fifth aspect of the present invention is the rubber crawler according to any one of the first to fourth aspects, wherein the rubber body width of a wheel rolling surface formed on the peripheral surface of the rubber body is as follows. A main cord is embedded on the outer peripheral side of the rubber body at the outer end in the direction.
In the rubber crawler according to claim 6 of the present invention, a lug is formed on the outer peripheral surface of the rubber body, and the lug partially overlaps the rubber protrusion when viewed from the outer peripheral side of the rubber body.

  As described above, the rubber crawler of the present invention can reduce the winding resistance.

It is the side view which looked at the rubber crawler of a 1st embodiment from the side (crawler width direction). It is a perspective view containing the partial cross section of the rubber crawler of 1st Embodiment. It is an enlarged view of the arrow 3X part of FIG. It is the top view which looked at the rubber crawler of 1st Embodiment from the inner peripheral side. It is the top view which looked at the rubber crawler of 1st Embodiment from the outer peripheral side. FIG. 6 is a sectional view taken along line 6X-6X in FIG. 5. It is sectional drawing which cut | disconnected the rubber crawler of 1st Embodiment along the centerline which passes along the center of a crawler width direction. It is a perspective enlarged view containing the partial cross section of the rubber crawler of 2nd Embodiment. It is the top view which looked at the rubber crawler of 2nd Embodiment from the inner peripheral side. FIG. 10 is a cross-sectional view taken along line 10X-10X in FIG. 9. (A) It is the top view which looked at the rubber crawler which has a hollow part of a 1st modification from the inner peripheral side. (B) It is sectional drawing which cut | disconnected the rubber crawler which has a hollow part of a 1st modification along the centerline which passes along the center of a crawler width direction. (A) It is the top view which looked at the rubber crawler which has a hollow part of a 2nd modification from the inner peripheral side. (B) It is sectional drawing which cut | disconnected the rubber crawler which has a hollow part of a 2nd modification along the centerline which passes along the center of a crawler width direction.

(First embodiment)
Hereinafter, the rubber crawler according to the first embodiment of the present invention will be described with reference to FIGS.

  The endless rubber crawler 10 as an example of the rubber crawler according to the first embodiment is a so-called coreless-less type rubber crawler having no cored bar.

As shown in FIG. 1, the rubber crawler 10 is used by being wound around a drive wheel 100 connected to a drive shaft of a crawler wheel as a machine body and an idler wheel 102 rotatably attached to the crawler wheel. A plurality of rolling wheels 104 disposed between the driving wheel 100 and the idler wheel 102 and rotatably attached to the crawler wheel roll on the inner periphery of the rubber crawler 10.
The driving wheel 100, the idler wheel 102, and the wheel 104 are examples of wheels according to the present invention.

In the present embodiment, the circumferential direction of the endless rubber crawler 10 (direction of arrow S in FIGS. 4 and 5) is referred to as “crawler circumferential direction”, and the width direction of the rubber crawler 10 (arrow W in FIGS. 4 and 5). (Direction) is described as “crawler width direction”. The crawler circumferential direction and the crawler width direction are orthogonal to each other when the rubber crawler 10 is viewed from the outer peripheral side or the inner peripheral side.
Further, in the present embodiment, the inner peripheral side (the arrow IN direction side in FIGS. 6 and 7) of the rubber crawler 10 that is wound around the driving wheel 100, the idler wheel 102, and the wheel 104 is defined as “inside the crawler”. The peripheral side of the rubber crawler 10 (the arrow OUT direction side in FIGS. 6 and 7) is referred to as the “crawler outer peripheral side”. 6 and 7, the arrow IN direction (annular inner direction) and the arrow OUT direction (annular outer direction) indicate the inner and outer directions of the rubber crawler 10 in the wound state.
In the present embodiment, the rubber crawler 10 is wound around the driving wheel 100 and the idler wheel 102. However, the present invention is not limited to this configuration, and the driving wheel 100, the idler wheel 102, and the plurality of wheel 104. Depending on the arrangement, the rubber crawler 10 may be wound around one or a plurality of rolling wheels 104 in addition to the driving wheel 100 and the idle wheel 102.

  Further, the crawler traveling device 90 (see FIG. 1) as a traveling unit of the crawler vehicle is configured by the driving wheel 100, the idler wheel 102, the rolling wheel 104, and the rubber crawler 10 wound around the driving wheel 100 and the idler wheel 102. Has been.

  As shown in FIG. 1, the drive wheel 100 has a pair of disk-shaped wheel parts 100A connected to the drive shaft of the crawler wheel. The ring portion 100A rolls while the outer peripheral surface 100B comes into contact with a wheel rolling surface 16 of a rubber crawler 10 described later. Further, pin portions (not shown) are formed at regular intervals in the circumferential direction so as to be spanned between the peripheral portions of the pair of ring portions 100A. The pin portion is engaged (engaged) with a rubber protrusion 14 to be described later, and the driving force from the crawler wheel is transmitted to the rubber crawler 10 by engaging with the rubber protrusion 14. . The rubber crawler 10 to which the driving force is thus transmitted circulates between the driving wheel 100 and the idler wheel 102. Then, by the circulation of the rubber crawler 10, a lug 18 described later catches the ground, and the crawler vehicle having the crawler traveling device 90 moves (runs).

  The idler wheel 102 has a pair of disc-shaped wheel portions 102A that are rotatably attached to the crawler wheel. The ring portion 102A has an outer peripheral surface 102B that comes into contact with a wheel rolling surface 16 of a rubber crawler 10 described later. The idler wheel 102 is pressed in a direction away from the drive wheel 100 by a pressurizing mechanism such as hydraulic pressure (not shown) provided on the crawler vehicle side and is pressed against the wheel rolling surface 16 of the rubber crawler 10 to tension the rubber crawler 10. (Tension) is maintained.

  The wheel 104 supports the weight of the crawler wheel, and has a disc-shaped wheel portion 104A that is rotatably attached to the crawler wheel. In this ring portion 104A, an outer peripheral surface 104B comes into contact with a wheel rolling surface 16 of a rubber crawler 10 described later.

  The idler wheel 102 and the rolling wheel 104 are driven to rotate with respect to the rubber crawler 10 circulating between the drive wheel 100 and the idler wheel 102.

  As shown in FIG. 1, the rubber crawler 10 has a rubber belt 12 in which a rubber material is formed in an endless belt shape. The rubber belt 12 of the present embodiment is an example of an endless rubber body of the present invention. In addition, the circumferential direction, the width direction, the inner circumferential side, and the outer circumferential side of the rubber belt 12 of the present embodiment coincide with the crawler circumferential direction, the crawler width direction, the crawler inner circumferential side, and the crawler outer circumferential side, respectively.

  As shown in FIGS. 1 to 5, a plurality of rubber protrusions 14 projecting toward the crawler inner circumferential side are formed on the inner circumferential surface 12 </ b> A (an example of a rubber inner circumferential surface) of the rubber belt 12 at intervals in the crawler circumferential direction. Yes. The rubber protrusion 14 is disposed in the center of the rubber belt 12 in the crawler width direction, and restricts movement of a wheel rolling on a wheel rolling surface 16 (described later) in the crawler width direction by contact.

As shown in FIGS. 2 to 4, wheel rolling surfaces 16 extending along the crawler circumferential direction are formed on both outer sides in the crawler width direction across the rubber protrusion 14 of the rubber belt 12. The wheel rolling surface 16 is flat and constitutes a part of the inner peripheral surface 12A of the rubber belt 12.
Moreover, on the wheel rolling surface 16, the driving wheel 100, the idler wheel 102, and the rolling wheel 104 as an example of a wheel roll.

  As shown in FIGS. 6 and 7, a block-shaped lug 18 is formed on the outer periphery of the rubber belt 12 so as to protrude toward the outer periphery of the crawler and to contact the ground. As shown in FIG. 6, the lug 18 is composed of a pair of lugs 18 </ b> A arranged on the left and right sides of the center line CL, and a pair of lugs 18 </ b> B arranged so as to cross the center line CL. The lugs 18A and lugs 18B are alternately formed in the crawler circumferential direction. Further, both the lug 18A and the lug 18B are arranged so as to partially overlap the crawler outer peripheral side of the rubber protrusion 14.

As shown in FIGS. 6 and 7, an endless belt-shaped main cord layer 20 extending along the crawler circumferential direction is embedded in the rubber belt 12. The main cord layer 20 is formed by rubber-coating one main cord wound spirally along the crawler circumferential direction, or a plurality of main cords along the crawler circumferential direction are arranged in parallel (in the crawler width direction). And in parallel with rubber coating.
In the present embodiment, a steel cord having excellent tensile strength is used as the main cord. However, the present invention is not limited to this configuration, and an organic fiber (for example, nylon) may be used as long as it has sufficient tensile strength. Organic fiber cords composed of fibers, aromatic polyamide fibers, etc.) may be used as the main cord.

  In the present embodiment, one main cord layer 20 is embedded in the rubber belt 12, but the present invention is not limited to this configuration, and at least one of the crawler inner peripheral side and outer peripheral side of the main cord layer 20, The cross cords intersecting with the main cord may be arranged in parallel in the crawler circumferential direction, and one or more cross cord layers formed by rubber coating may be laminated.

As shown in FIGS. 3, 4, and 7, a recess 22 that is recessed toward the outer periphery of the crawler is formed between the rubber protrusions 14 adjacent to each other in the crawler circumferential direction of the inner peripheral surface 12 </ b> A of the rubber belt 12. Specifically, as shown in FIG. 6, the indented portion 22 of the present embodiment is a crawler outer peripheral side with respect to the wheel rolling surface 16 with respect to the wheel rolling surface 16 constituting a part of the inner peripheral surface 12A. Indented. That is, the rubber crawler 10 is recessed from the rubber thickness T1 of the portion corresponding to the wheel rolling surface 16 with reference to the main cord layer 20 that is a neutral surface of bending when the rubber crawler 10 is wound around the driving wheel 100 and the idler wheel 102. The rubber thickness T2 at the portion corresponding to the portion 22 is thin.
The rubber thickness T1 is a distance measured along the crawler inner / outer direction between the inner circumferential surface of the main cord layer 20 and the wheel rolling surface 16, and the rubber thickness T2 is the inner circumferential surface of the main cord layer 20. It is the distance measured along the crawler inside and outside direction between the bottom surface of the hollow portion 22 and the bottom.

  The rubber thickness T2 is preferably thinner than half of the rubber thickness T1.

  As shown in FIGS. 3 and 4, the recess 22 extends along the crawler width direction and extends from between the adjacent rubber protrusions 14 to the outside in the crawler width direction to the outside in the crawler width direction. For this reason, in the present embodiment, both end portions 22 </ b> A of the hollow portion 22 in the crawler width direction enter the wheel rolling surface 16. Specifically, when the width of the wheel rolling surface 16 is denoted by W1 and the amount of entry of the end 22A of the recess 22 into the wheel rolling surface 16 is denoted by W2, the amount of penetration W2 is 1 of the width W1. It is preferable to be about -30%.

  In the present embodiment, the end 22A of the recess 22 is curved in an arc shape toward the outside in the crawler width direction. With this configuration, it is possible to suppress stress concentration locally on the end 22 </ b> A of the recess 22.

  Moreover, the hollow part 22 is formed over the whole between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12A of the rubber belt 12 (see FIG. 7).

  As shown in FIG. 7, in the hollow portion 22, the hollow wall 22 </ b> C is curved in an arc shape toward the bottom portion 22 </ b> B. Thereby, it can suppress that stress concentrates locally between the bottom part 22B of the hollow part 22, and the hollow wall 22C.

Next, the effect of the rubber crawler 10 of this embodiment is demonstrated.
In the rubber crawler 10, the recess 22 that is recessed toward the outer periphery of the crawler is formed between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12 </ b> A of the rubber belt 12. Bending rigidity (bending rigidity for bending the rubber belt 12 inward or outward) is lowered. Thereby, the winding resistance when the rubber belt 12 is wound around the driving wheel 100 and the idle wheel 102 is reduced, that is, the winding resistance of the rubber crawler 10 is reduced.
As a result, the energy loss of the crawler vehicle using the rubber crawler 10 is reduced, and the fuel consumption is improved.
Further, since the rubber crawler 10 is easily bent along the outer peripheral surface 100B of the drive wheel 100, the engagement (engagement) between the pin portion (not shown) of the drive wheel 100 and the rubber protrusion 14 is improved, and the tooth skip phenomenon occurs. Occurrence of (a phenomenon in which the pin portion gets over the rubber protrusion 14) is suppressed.

  Further, in the rubber crawler 10, since the recess 22 is formed between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12 </ b> A of the rubber belt 12, the amount of rubber at the portion between the rubber protrusions 14 adjacent to each other on the rubber belt 12. (Rubber volume) is reduced, and the amount of heat generated at the portion between the rubber protrusions 14 of the rubber belt 12 that is repeatedly wound around the drive wheel 100 and the idler wheel 102 during traveling is reduced.

  Further, in the rubber crawler 10, the weight is reduced due to the formation of the recess 22. Thereby, the fuel consumption of the crawler vehicle in which the rubber crawler 10 is used can be further improved.

  In the rubber crawler 10, since the recess 22 extends in the crawler width direction, the bending rigidity of the portion between the rubber protrusions 14 adjacent to each other of the rubber belt 12 is further reduced. Thereby, the winding resistance when the rubber belt 12 is wound around the wheels (the driving wheel 100 and the idle wheel 102) is reduced.

  Further, in the rubber crawler 10, since the recess 22 is formed across the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12 </ b> A of the rubber belt 12, when the rubber belt 12 wraps around the driving wheel 100 and the idler wheel 102. Can be effectively reduced.

  During traveling, the rubber crawler 10 is placed in a reverse bending state by stepping on, for example, a protrusion (stone or the like) on the ground or a curbstone on the road surface, and the main cord layer 20 (between adjacent rubber protrusions 14 of the rubber belt 12) ( Even if a tensile stress (bending stress) acts on the inner peripheral side of the crawler from the bending neutral surface), the depression 22 is formed between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12A as described above. By reducing the thickness of the rubber from the main cord layer 20 between the rubber protrusions 14 adjacent to each other, an excessive tensile stress is applied to the inner peripheral side of the crawler than the main cord layer between the rubber protrusions 14 adjacent to each other of the rubber belt 12. It can suppress acting.

  In the rubber crawler 10, the recess 22 is extended outwardly between the adjacent rubber protrusions 14 in the crawler width direction, so that the winding resistance when the rubber belt 12 is wound around the driving wheel 100 and the idler wheel 102 is increased. Can be further reduced.

  In the rubber crawler 10 according to the first embodiment, as shown in FIG. 4, the recess 22 is formed between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12 </ b> A of the rubber belt 12. The invention is not limited to this, and if a hollow portion that is recessed toward the outer periphery of the crawler is formed in a part between the rubber protrusions 14 adjacent to each other, the winding resistance of the rubber crawler 10 can be reduced. For example, one or a plurality of indentations may be formed between the rubber protrusions 14 adjacent to each other in the rubber belt 12 such that the opening shape is circular, elliptical, or substantially polygonal. Moreover, you may use the hollow parts 24 and 26 shown in FIG. 11, FIG. 12 as a modification of the hollow part 22. FIG.

  11A and 11B is formed only between the rubber protrusions 14 adjacent to each other on the inner peripheral surface 12A, that is, the crawler. An end 24A in the width direction is formed between the rubber protrusions 14 adjacent to each other. Thereby, the vertical motion resulting from the hollow part 24 of the wheel (especially rolling wheel 104) rolling on the wheel rolling surface 16 is suppressed.

  12A and 12B is formed only between the rubber protrusions 14 adjacent to each other in the crawler circumferential direction, and extends in the crawler width direction. The rubber protrusion 14 is disposed adjacent to the root portion in the crawler circumferential direction. Moreover, as for the hollow part 26, the bottom part 26B is curving in the circular arc shape on the crawler outer peripheral side. Thus, by curving the bottom portion 26B in an arc shape, local stress concentration on the bottom portion 26B of the recessed portion 26 can be suppressed.

(Second Embodiment)
Next, a rubber crawler according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, the rubber crawler 30 of the present embodiment has the same configuration as the rubber crawler 10 of the first embodiment, except for the configuration of the recess and the circumferential groove. For this reason, below, the structure of the hollow part 32 and the circumferential groove | channel 34 is demonstrated.

As shown in FIGS. 8 and 9, the recess 32 extends from between the rubber protrusions 14 adjacent to each other to the outside in the crawler width direction and is formed between the rubber protrusions 14 adjacent to each other.
Moreover, the hollow part 32C has the hollow part 32C curved in circular arc shape toward the bottom part 32B. Thereby, it can suppress that stress concentrates locally between the bottom part 32B of the hollow part 32, and the hollow wall 32C.

  As shown in FIGS. 8 and 9, on both outer sides in the crawler width direction across the rubber protrusion 14 on the inner peripheral surface 12 </ b> A of the rubber belt 12, linearly along the crawler circumferential direction adjacent to the root of the rubber protrusion 14. An extending circumferential groove 34 is formed. By the circumferential grooves 34, the end portions 32 </ b> A side in the crawler width direction of the recessed portions 32 adjacent to each other in the crawler circumferential direction are connected to each other.

  As shown in FIGS. 8 and 10, the groove depth of the circumferential groove 34 is shallower than the depth of the recess 32.

Next, the effect of the rubber crawler 30 of 2nd Embodiment is demonstrated.
In addition, about the effect similar to 1st Embodiment among the effects of this embodiment, the description is abbreviate | omitted suitably.

In the rubber crawler 30, a circumferential groove 34 extending in the crawler circumferential direction is formed adjacent to the root of the rubber protrusion 14 on the inner circumferential surface 12 </ b> A of the rubber belt 12, and the depressions adjacent to each other in the crawler circumferential direction by the circumferential groove 34. Since the end portions 32A in the crawler width direction of 32 are connected to each other, for example, the end portion of the rubber belt 12 (the end in the crawler width direction) is projected on a protrusion (stone or the like) on the ground or a curb on the road surface. When the one side end portion is lifted and the one side end portion is lifted, the circumferential groove 34 is deformed (elastically deformed so that the groove width is narrowed), and the boundary portion between the rubber protrusion 14 and the rubber belt 12 It is possible to suppress an excessive bending stress (bending stress in the crawler width direction) from acting on the surface.
Further, by forming the circumferential groove 34 in the rubber belt 12, it is possible to reduce the winding resistance when the rubber belt 12 is wound around the driving wheel 100 and the idle wheel 102.

  Furthermore, in the rubber crawler 30, even if the rubber protrusion 14 receives a force in the crawler width direction from the wheel (a thrust force of the wheel), the circumferential groove 34 is formed adjacent to the root of the rubber protrusion 14. Excessive stress can be suppressed from acting on the boundary between the rubber protrusion 14 and the rubber belt 12.

  In the second embodiment, the circumferential groove 34 is linearly extended along the crawler circumferential direction, but the present invention is not limited to this configuration, and the recesses 22 adjacent to each other in the crawler circumferential direction are connected to each other. If possible, the circumferential grooves 34 may extend in a wave shape (including sine waves, square waves, etc.) in the crawler circumferential direction, or may extend in a zigzag shape.

  Further, the configuration of the circumferential groove 34 of the second embodiment may be used to connect the recessed portions 24 of the first modification adjacent to each other in the crawler circumferential direction, and the second deformation adjacent to each other in the crawler circumferential direction. You may connect the hollow parts 26 of an example.

  In the first and second embodiments, the pin portion (not shown) of the driving wheel 100 is engaged with the rubber protrusion 14 to transmit the driving force from the crawler wheel to the rubber crawler, but the present invention has this configuration. The driving force from the crawler vehicle is not limited to the above, but the friction force between the outer peripheral surface 100B of the driving wheel 100 and the inner peripheral surface (wheel rolling surface 16) of the rubber crawler without providing the pin portion on the driving wheel 100. May be transmitted to the rubber crawler.

  In the first and second embodiments, the rubber belt 12 in which a rubber material is formed in an endless belt shape is used as an example of an endless rubber body (an object having rubber elasticity (that is, a rubber body)) of the present invention. The invention is not limited to this configuration, and a rubber elastic belt formed of a material having rubber elasticity in an endless belt shape, for example, an elastomer belt formed of an elastomer material in an endless belt shape may be used.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

10, 30 Rubber crawler (Rubber crawler)
12 Rubber belt (endless rubber body)
12A Inner peripheral surface (Rubber body peripheral surface)
14 Rubber protrusions 22, 24, 26 Recess 32 Recess 34 Circumferential groove 100 Drive wheel (wheel)
102 idler wheel
104 Wheels
CL Center line S Crawler circumferential direction (Rubber body circumferential direction)
W Crawler width direction (rubber width direction)
IN Crawler inner circumference (Rubber body circumference)
OUT crawler outer peripheral side (rubber body outer peripheral side)

Claims (6)

An endless rubber body wound around a plurality of wheels;
A plurality of rubber protrusions provided on the peripheral surface of the rubber body at intervals in the circumferential direction of the rubber body, projecting toward the circumferential side of the rubber body, and contacting the wheel to restrict the movement of the wheel in the width direction of the rubber body When,
A recess formed between the rubber protrusions adjacent to each other on the outer peripheral surface of the rubber body , extending along the rubber body width direction, and recessed toward the outer peripheral side of the rubber body;
The recesses formed on both sides of the rubber body in the width direction of the rubber body adjacent to the base of the rubber protrusion, extending in the circumferential direction of the rubber body, and adjacent to each other in the circumferential direction of the rubber body. A circumferential groove having a groove depth shallower than the depth of the hollow portion, connecting end portions in the rubber body width direction of the portions,
Rubber crawler with. The rubber crawler according to claim 1 , wherein the recess is formed between the rubber protrusions adjacent to each other on the peripheral surface of the rubber body. The rubber crawler according to claim 1 , wherein the hollow portion extends from between the adjacent rubber protrusions to the outer side in the rubber body width direction.   The rubber crawler according to claim 1, wherein a bottom portion of the hollow portion is curved in an arc shape toward the outer peripheral side of the rubber body. The main cord is embedded in the rubber body outer peripheral side of the rubber body width direction outer side edge part of the wheel rolling surface formed in the rubber body peripheral surface in any one of Claims 1-4. The rubber crawler described.   The rubber crawler according to any one of claims 1 to 5, wherein a lug is formed on the outer peripheral surface of the rubber body, and the lug partially overlaps the rubber protrusion when viewed from the outer peripheral side of the rubber body.

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