JP2012250670A - Rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber crawler which exhibits stable travelling property by suppressing distortion.SOLUTION: In the rubber crawler, a core metal 22 includes a wing part 25 embedded in a crawler body and a pair of protrusion parts 26 protruded toward the inner peripheral surface side of the crawler body from the wing part 25, wherein the protrusion parts 26 have inner protrusions 28 protruded toward one side of the crawler circumferential direction from the wing part 25 and outer protrusions 29 protruded toward the other side of the crawler circumferential direction from the wing part 25. Therein, between a pair of outer protrusions 29 on the core metal 22 located on one side of the core metals 22 themselves adjoining each other in the crawler circumferential direction, a pair of inner protrusions 28 on the core metal 22 located on the other side are arranged and, respectively on the inner protrusions 28 and outer protrusions 29 adjoining the crawler width direction H of the core metals 22 themselves adjoining each other in the crawler circumferential direction, the interval in the crawler width direction H between opposed surfaces 31, 32 opposite to each other in the crawler width direction H is equal over the whole region.

Description

  The present invention relates to a rubber crawler.

2. Description of the Related Art Conventionally, a core bar for a rubber crawler as shown in Patent Document 1 below is known, for example. The core bar includes a wing portion embedded in an endless belt-like crawler body formed of a rubber material, and a pair of protrusion portions protruding from the wing portion toward the inner peripheral surface side of the crawler body. . The protruding portion includes an inner protrusion protruding from the wing portion toward one side in the crawler circumferential direction, and an outer protrusion protruding from the wing portion toward the other side in the crawler circumferential direction.
In general, as a rubber crawler provided with the cored bar, there is known a configuration in which a plurality of the cored bar is arranged on the crawler body at intervals in the crawler circumferential direction. In the rubber crawler, a pair of inner protrusions in the core metal located on the other side is disposed between the pair of outer protrusions in the core metal located on the one side among the core bars adjacent in the crawler circumferential direction. ing.
Here, in the core bar, the size of the outer protrusion and the inner protrusion in the crawler width direction gradually decreases from the outer peripheral surface side to the inner peripheral surface side of the crawler body, and the cores adjacent to each other in the crawler peripheral direction. Among gold | metal | money, in each inner protrusion and outer protrusion adjacent to the crawler width direction, the space | interval of the crawler width direction of the opposing surfaces which oppose a crawler width direction goes to the inner peripheral surface side from the outer peripheral surface side of a crawler body. It becomes gradually larger as you follow.

  By the way, when using this type of rubber crawler, when the rubber crawler is fed and moved along the crawler circumferential direction, the crawler main body is deformed in the crawler width direction or around a virtual axis extending in the crawler circumferential direction, for example. Torsional deformation. At this time, deformation of the crawler main body is restricted by the opposing surfaces engaging each other.

JP 2010-264850 A

  However, in the conventional rubber crawler, when the crawler body is twisted and deformed around the imaginary axis so that the inner ends located on the inner peripheral surface side of the crawler body are close to each other among the facing surfaces, It was easy to deform greatly.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a rubber crawler that can suppress deformation and exhibit stable running performance.

In order to solve the above problems, the present invention proposes the following means.
A rubber crawler according to the present invention includes an endless belt-like crawler main body formed of a rubber material, and a plurality of core bars arranged at intervals in the crawler circumferential direction on the crawler main body. A wing portion embedded in the crawler body, and a pair of protrusion portions protruding from the wing portion toward the inner peripheral surface side of the crawler body, the protrusion portions being in the crawler circumferential direction from the wing portion. Of the cored bar adjacent to each other in the crawler circumferential direction, and an inner projection that projects from the wing portion toward the other side in the crawler circumferential direction. A rubber crawler in which a pair of inner projections in the core metal located on the other side is disposed between a pair of outer projections in the core metal located in the core metal, and the core metal adjacent in the crawler circumferential direction Adjacent to each other in the crawler width direction In each said protrusion and the outer protrusion that, the crawler width direction between the opposed faces facing each other in the crawler width direction, and wherein the equivalent over its entire area.

  According to this invention, the crawler width direction spacing between the opposing surfaces is the same throughout the entire area, and is the same regardless of the position in the thickness direction of the crawler body. Compared to the case where the diameter gradually increases from the outer peripheral surface side toward the inner peripheral surface side, the crawlers are arranged such that, of the opposing surfaces, inner end portions located on the inner peripheral surface side of the crawler body approach each other. When the main body is twisted and deformed around a virtual axis extending in the crawler circumferential direction, the inner end portions can be engaged with each other in a state where the deformation amount of the crawler main body is small. Therefore, the crawler body can be prevented from being largely twisted and deformed around the virtual axis. For example, the rubber crawler is provided with a drive wheel, a driven wheel, and a driven wheel provided on a crawler traveling body attached to the rubber crawler. Stable running performance can be exhibited, for example, by suppressing the wheel from being removed from the wheel.

  In addition, since the distance between the opposing surfaces in the crawler width direction is the same throughout the entire area, when the crawler body is deformed in the crawler width direction and the opposing surfaces engage with each other, the opposing surfaces face each other. It becomes possible to make it easy to contact. Thereby, while suppressing that an opposing surface wears locally, a deformation | transformation of the crawler main body in the crawler width direction can be controlled reliably.

  In addition, when the wheel passing surface through which the wheel passes is formed by a top surface facing the inner peripheral surface side of the crawler main body at the protruding portion, the distance between the facing surfaces in the crawler width direction is the thickness. Compared to the case where the distance is gradually increased from the outer peripheral surface side to the inner peripheral surface side of the crawler main body, the inner peripheral surface of the crawler main body is larger than the case where the distance is gradually increased from the outer peripheral surface side to the inner peripheral surface side. It is possible to increase the area of the top surface of the projecting portion while suppressing the area of the opening surface that opens toward the side, and to easily ensure a large area of the wheel passing surface. As a result, when the wheel passes on the wheel passing surface, it becomes possible to easily disperse the load of the wheel on a wide range on the wheel passing surface, and to suppress wear of the wheel passing surface. Can do.

  Further, in a longitudinal sectional view along both the crawler width direction and the thickness direction of the crawler body, the inner protrusion and the outer protrusion adjacent to each other in the crawler width direction are respectively in the thickness direction of the facing surfaces. May be inclined with respect to the thickness direction so as to overlap each other.

  In this case, in the longitudinal sectional view, the inner protrusion and the outer protrusion adjacent to each other in the crawler width direction are inclined with respect to the thickness direction so that the projections in the thickness direction of the opposing surfaces overlap each other. Since the crawler main body is deformed in the thickness direction and the inner protrusion and the outer protrusion adjacent to each other in the crawler width direction relatively move in the thickness direction, the opposing surfaces are The deformation of the crawler body can be regulated by engaging with each other in the thickness direction.

  Further, the pair of inner protrusions and the pair of outer protrusions provided on the same cored bar are gradually moved toward each other in the crawler width direction from the outer peripheral surface side to the inner peripheral surface side of the crawler body. It may be close or separated.

  In this case, the pair of inner protrusions and the pair of outer protrusions provided on the same core metal gradually approach or separate from each other in the crawler width direction from the outer peripheral surface side to the inner peripheral surface side of the crawler body. Therefore, when the crawler main body is deformed in the thickness direction, between the core bars adjacent in the crawler circumferential direction, the opposing surfaces of the inner protrusions of the core bars located on the other side are arranged on the one side. It is possible to simultaneously engage the opposing surfaces of the outer protrusions of the cored bar positioned, and the load that the inner protrusion and the outer protrusion receive each other can be dispersed.

  In addition, the pair of inner protrusions and the pair of outer protrusions provided on the same core metal may each be inclined and extend in the same direction with respect to the thickness direction.

  In this case, since the pair of inner protrusions and the pair of outer protrusions provided on the same core metal are inclined in the same direction with respect to the thickness direction, the crawler main body has the thickness. A pair of inner protrusions of the core metal located on the other side of the core bars deformed in the vertical direction and adjacent to each other in the circumferential direction of the crawler with respect to the pair of outer protrusions of the core metal located on the one side The inner surface of the pair of inner protrusions, and the opposite surface of one of the pair of inner protrusions, the crawler width direction of the inner protrusion The claw body can be deformed in the thickness direction by being engaged with the opposing surface of the outer protrusion adjacent to the claw in the thickness direction.

  According to the rubber crawler according to the present invention, it is possible to suppress the deformation and exhibit stable running performance.

1 is a perspective view including a partial cross section of a rubber crawler according to a first embodiment of the present invention. It is the top view which looked at the metal core with which the rubber crawler shown in FIG. 1 was seen from the inner peripheral surface side of the crawler main body. It is an AA cross-sectional arrow view shown in FIG. It is sectional drawing for demonstrating the effect | action of the rubber crawler shown in FIG. It is sectional drawing for demonstrating the effect | action of the rubber crawler shown in FIG. It is a top view of the metal core with which the rubber crawler concerning a 2nd embodiment of the present invention was equipped. It is a BB cross-sectional arrow view shown in FIG. It is a top view of the core metal with which the rubber crawler concerning a 3rd embodiment of the present invention was equipped. It is CC sectional view taken on the line in FIG. It is a top view of the metal core with which the rubber crawler concerning a 4th embodiment of the present invention was equipped. It is DD sectional view taken on the line in FIG.

Hereinafter, a crawler type traveling body provided with a rubber crawler according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, for example, a pair of left and right crawler type traveling bodies 10 disposed under a construction machine such as a hydraulic excavator, an agricultural machine, and other crawler type vehicles have a driving wheel 11 and a driven wheel (not shown), respectively. A rubber crawler 20 wound in an endless belt shape is provided.
The drive wheel 11 is a sprocket and is rotatably supported by drive means such as a hydraulic motor provided on a vehicle frame (not shown). The driven wheel is rotatably supported by the vehicle frame.

The rubber crawler 20 is made of a rubber material, and is provided with an endless belt-like crawler body 21 that is wound between the driving wheel 11 and the driven wheel, and is disposed on the crawler body 21 with an interval in the crawler circumferential direction. A plurality of cored bars 22.
A plurality of lugs 23 project from the outer peripheral surface 21 b of the crawler body 21, and meshing holes 24 for the drive wheels 11 are opened between the core bars 22 adjacent to each other in the crawler circumferential direction in the crawler body 21. ing.

The cored bar 22 includes a wing part 25 embedded in the crawler main body 21 and a pair of protrusions 26 protruding from the wing part 25 toward the inner peripheral surface 21 a side of the crawler main body 21.
The wing portion 25 extends along the crawler width direction H, and the pair of protrusions 26 are disposed at the center portion of the wing portion 25 in the crawler width direction H. In the crawler main body 21, the crawler peripheral portion 21 is located on the outer peripheral surface 21 b side of the crawler main body 21 with respect to the wing 25, and on each portion located outside the crawler main body 21 along the crawler width direction H with respect to the protrusion 26. A pair of steel cord layers 27 extending in the direction are embedded.

The pair of protrusions 26 are spaced apart from each other in the crawler width direction H, and are disposed with the center of the blade portion 25 in the crawler width direction H interposed therebetween, and the drive wheel 11 is interposed between these protrusions 26. And the driven wheel passes. In the illustrated example, each protrusion 26 is covered with a rubber film formed integrally with the crawler main body 21.
The protruding portion 26 protrudes from the wing portion 25 toward one side in the crawler circumferential direction, and protrudes from the wing portion 25 toward the other side in the crawler circumferential direction. In addition, an outer protrusion 29 located outside the crawler width direction H, and a base 30 disposed on the wing portion 25 and connected to the inner protrusion 28 and the outer protrusion 29 are provided.

  As shown in FIG. 2, among the inner wall surfaces 30 a facing the inside in the crawler width direction H in the base portion 30, one side portion located on the one side extends along the crawler circumferential direction and is located on the other side. The other side portion that extends gradually extends outward in the crawler width direction H toward the other side. Further, of the outer wall surface 30b facing the inside in the crawler width direction H in the base portion 30, one side portion located on the one side gradually extends inward in the crawler width direction H toward the one side, The other side portion located on the other side extends along the crawler circumferential direction.

  The inner protrusion 28 and the outer protrusion 29 have the same shape and the same size and are formed in a rectangular parallelepiped shape, and as shown in FIG. 3, a longitudinal section along both the crawler width direction H and the thickness direction T of the crawler body 21. In view, it extends in the thickness direction T, and in the illustrated example, extends in parallel to the thickness direction T. Further, the sizes along the crawler width direction H in each of the inner protrusion 28 and the outer protrusion 29 are the same regardless of the thickness direction T.

As shown in FIG. 2, in the inner protrusion 28, the inner wall surface 28 a facing the inner side in the crawler width direction H is connected to the one side portion of the inner wall surface 30 a of the base 30 in a flush manner, and the outer surface in the crawler width direction H is The facing outer wall surface 28b is connected to the one side portion of the outer wall surface 30b of the base portion 30 through a bent portion 28c.
Further, in the outer protrusion 29, an inner wall surface 29a facing inward in the crawler width direction H is connected to the other side portion of the inner wall surface 30a of the base portion 30 through a bent portion 29c, and the outer wall surface facing outward in the crawler width direction H. 29 b is connected flush with the other side portion of the outer wall surface 30 b of the base 30.

  Here, between the pair of outer protrusions 29 in the core metal 22 located on the one side among the core bars 22 adjacent in the crawler circumferential direction, the pair of inner protrusions in the core metal 22 located on the other side. 28 is arranged. In the illustrated example, the tip portions of the pair of inner projections 28 are located between the tip portions of the pair of outer projections 29.

  In the present embodiment, as shown in FIG. 3, among the core bars 22 adjacent to each other in the crawler circumferential direction, the inner protrusion 28 and the outer protrusion 29 adjacent to each other in the crawler width direction H face each other in the crawler width direction H. The intervals in the crawler width direction H between the facing surfaces 31 and 32 that match each other are the same over the entire area. In the illustrated example, the facing surface 31 of the inner protrusion 28 is constituted by the outer wall surface 28 b at the tip portion of the inner protrusion 28, and the facing surface 32 of the outer protrusion 29 is formed by the outer wall surface 29 b at the tip portion of the outer protrusion 29. It is comprised and all become a flat surface. These opposing surfaces 31, 32 are parallel to each other, and each opposing surface 31, 32 extends along the thickness direction T and extends linearly in the longitudinal sectional view. .

  In addition, the said interval is equivalent over the whole area includes a substantially equivalent range, and even when the interval varies, the difference between the largest interval and the smallest interval. However, for example, in the case of about 1.5 mm or less, the interval is assumed to be the same over the entire area.

  Here, as shown in FIG. 2, in each of the inner protrusion 28, the outer protrusion 29, and the base portion 30, the top surfaces facing the inner peripheral surface 21 a side of the crawler main body 21 are smoothly connected to each other without any step. In the protruding portion 26, a top surface 26a facing the inner peripheral surface 21a side of the crawler main body 21 is configured. As shown in FIG. 1, the top surface 26 a of the protruding portion 26 adjacent in the crawler circumferential direction forms a pair of wheel passing surfaces S extending over the entire circumference in the crawler circumferential direction.

On the wheel passing surface S, the wheel 12 rotatably supported by the vehicle frame is rolled along with the feed movement of the rubber crawler 20 along the crawler circumferential direction.
A plurality of roller wheels 12 are disposed between the drive wheel 11 and the driven wheel on the inner peripheral surface 21a side of the crawler body 21. A part of the plurality of wheels 12 supports, from the upper side, a portion located on the lower side, which is the ground side, on the inner peripheral surface 21a of the crawler body 21 and presses it against the ground. The remaining rollers 12 support a portion of the inner peripheral surface 21a of the crawler main body 21 that is positioned on the upper side, which is on the side opposite to the ground, so as not to loosen from the lower side.

  Each roller 12 is supported rotatably around a rotation axis extending in the crawler width direction H, and a guide extending over the entire circumference around the rotation axis is provided on the outer peripheral surface of the center of the roller 12 in the crawler width direction H. A ridge 12a is provided to protrude. The guide protrusion 12a is disposed between the pair of protrusions 26, and faces both protrusions 26 from the inside in the crawler width direction H. In the roller 12, the outer side of the guide protrusion 12a in the crawler width direction H than the guide protrusion 12a. Each part located in is located on a pair of wheel passing surface S.

  In the present embodiment, each wheel passing surface S continuously extends in the crawler circumferential direction by arranging the pair of inner protrusions 28 between the pair of outer protrusions 29 as described above. Compared with a case where the roller 12 intermittently extends in the crawler circumferential direction, the roller 12 is less likely to drop from the wheel passing surface S.

The metal core 22 in the rubber crawler 20 configured as described above is formed by, for example, casting using a mold. The mold can be constituted by a pair of mold members in which a core metal cavity is formed, and the core metal 22 formed in the cavity is removed as these mold members. Sometimes, it is possible to adopt a configuration in which they are separated from each other in the crawler circumferential direction. In this case, the cored bar 22 is formed with a parting line (not shown) extending over the entire circumference so as to straddle the protruding portion 26 in the crawler width direction H. Further, in this case, when the top surface 26a of the protruding portion 26 is gradually inclined toward the outer peripheral surface 21b side of the crawler main body 21 as it goes toward the outer side of the cored bar 22 along the crawler circumferential direction, this inclination is reduced. It can be used as a draft of the mold, and the mold can be surely easily removed from the mold.
In addition, the manufacturing method of the cored bar 22 is not restricted to the said casting, For example, it can also form by forging etc.

  As described above, according to the rubber crawler 20 according to the present embodiment, the distance between the facing surfaces 31 and 32 in the crawler width direction H is the same over the entire region, and the distance in the thickness direction T depends on the position. Compared with the case where the distance gradually increases from the outer peripheral surface 21b side to the inner peripheral surface 21a side of the crawler main body 21, as shown in FIG. When the crawler body 21 is torsionally deformed around a virtual axis extending in the crawler circumferential direction so that the inner ends located on the inner peripheral surface 21a side of the crawler body 21 are close to each other. The inner ends can be engaged with each other in a state where the deformation amount of the crawler main body 21 is small. Accordingly, it is possible to suppress the crawler main body 21 from being largely twisted and deformed around the virtual axis, and for example, the rubber crawler 20 is prevented from being removed from the drive wheel 11, the driven wheel and the wheel 12. As a result, stable running performance can be exhibited.

  Further, since the distance between the facing surfaces 31 and 32 in the crawler width direction H is the same throughout the entire area, the crawler body 21 is deformed in the crawler width direction H as shown in FIG. When the two are engaged with each other, it is possible to easily bring these opposed surfaces 31 and 32 into surface contact. Thereby, while suppressing that the opposing surfaces 31 and 32 wear locally, the deformation | transformation of the crawler main body 21 of the crawler width direction H can be controlled reliably.

  Moreover, when the said wheel passing surface S is comprised by the top surface 26a of the protrusion part 26 like this embodiment, the space | interval of the crawler width direction H of the said opposing surfaces 31 and 32 is the said thickness direction T. Since the distance is the same regardless of the position of the crawler body 21, the distance between the crawler body 21 and the crawler body 21 is larger than the distance from the outer peripheral surface 21b side to the inner peripheral surface 21a side. It is possible to increase the area of the top surface 26a of the protruding portion 26 by suppressing the area of the opening surface that opens toward the inner peripheral surface 21a side, and to easily ensure a large area of the wheel passing surface S. Can do. As a result, when the wheel 12 passes over the wheel passage surface S, it becomes possible to easily disperse the load of the wheel 12 over a wide range in the wheel passage surface S. Can be suppressed.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the inner protrusion 28 and the outer protrusion 29 extend in parallel to the thickness direction T in the longitudinal sectional view, but the present invention is not limited to this. Like the cored bar 40 shown in FIG. 7, it may be inclined and extended with respect to the thickness direction T. In the cored bar 40, the pair of inner projections 28 and the pair of outer projections 29 provided on the same cored bar 40 are respectively the inner circumferential surface from the outer circumferential surface 21b side of the crawler body 21 in the longitudinal sectional view. Gradually approaching each other in the crawler width direction H toward the 21a side, and the opposing surfaces 31 and 32 are also inclined with respect to the thickness direction T. In the illustrated example, the edge on the outer peripheral surface 21b side of the crawler main body 21 on the facing surface 31 of the inner protrusion 28 and the edge on the inner peripheral surface 21a side of the crawler main body 21 on the facing surface 32 of the outer protrusion 29 are The positions in the crawler width direction H are the same.

  Further, instead of the cored bar 40 shown in FIGS. 6 and 7, the cored bar 50 shown in FIGS. 8 and 9 may be employed. In the metal core 50, the inner protrusion 28 and the outer protrusion 29 adjacent to each other in the crawler width direction H in the longitudinal cross-sectional view are such that the projections in the thickness direction T of the opposing surfaces 31 and 32 overlap each other. It extends inclining with respect to the thickness direction T. The opposing surfaces 31, 32 overlap each other in the crawler width direction H, and the edge on the outer peripheral surface 21 b side of the crawler body 21 on the opposing surface 31 of the inner protrusion 28 is on the opposing surface 32 of the outer protrusion 29. The crawler body 21 is positioned outside the crawler width direction H from the edge on the inner peripheral surface 21a side.

  In this case, in the longitudinal sectional view, the thickness of the inner protrusion 28 and the outer protrusion 29 adjacent to each other in the crawler width direction H is such that the projections in the thickness direction T of the opposing surfaces 31 and 32 overlap each other. The crawler main body 21 is deformed in the thickness direction T, and the inner protrusion 28 and the outer protrusion 29 adjacent to the crawler width direction H are in the thickness direction T. When relatively approaching, the opposing surfaces 31 and 32 can be engaged with each other in the thickness direction T to restrict deformation of the crawler body 21.

  Further, the pair of inner protrusions 28 and the pair of outer protrusions 29 provided on the same cored bar 22 gradually move in the crawler width direction from the outer peripheral surface 21b side to the inner peripheral surface 21a side of the crawler body 21. Since they are close to each other, when the crawler main body 21 is deformed in the thickness direction T, the inner protrusions 28 of the cored bar 22 located on the other side of the cored bars 22 adjacent to each other in the crawler circumferential direction. Can be simultaneously engaged with the opposing surface 32 of each outer projection 29 of the cored bar 22 located on the one side, and the load that the inner projection 28 and the outer projection 29 receive against each other is distributed. Can be made.

  8 and 9, the pair of inner protrusions 28 and the pair of outer protrusions 29 provided on the same core metal 22 are respectively connected from the outer peripheral surface 21b side of the crawler body 21 to the inner side. The crawler width direction H gradually approaches each other toward the peripheral surface 21a. However, the crawler width gradually increases from the outer peripheral surface 21b side to the inner peripheral surface 21a side of the crawler body 21. They may be separated from each other in the direction H.

  Furthermore, instead of the core metal 50 shown in FIGS. 8 and 9, the core metal 60 shown in FIGS. 10 and 11 may be employed. In the cored bar 60, the pair of inner projections 28 and the pair of outer projections 29 provided on the same cored bar 22 are inclined and extend in the same direction with respect to the thickness direction T. .

  In this case, since the pair of inner projections 28 and the pair of outer projections 29 provided on the same cored bar 22 extend in the same direction with respect to the thickness direction T, the crawler The main body 21 is deformed in the thickness direction T, and a pair of inner protrusions 28 of the core metal 22 positioned on the other side of the core bars 22 adjacent in the crawler circumferential direction are positioned on the one side. The inner projections 28 of the pair of inner projections 28 are moved relative to the inner peripheral surface 21a side and the outer peripheral surface 21b side of the crawler body 21 relative to the pair of outer projections 29. The opposing surface 31 of the projection 28 is engaged with the opposing surface 32 of the outer projection 29 adjacent to the one inner projection 28 in the crawler width direction H in the thickness direction T, and the crawler body 21 in the thickness direction T is engaged. Deformation can be regulated.

  Further, in each of the embodiments, the opposing surfaces 31 and 32 are linearly extended in the longitudinal sectional view, but the interval between the opposing surfaces 31 and 32 in the crawler width direction H is the thickness. As long as it is the same regardless of the position in the vertical direction T, it is not limited to this, and for example, it may extend in a curved line or may have an uneven shape in the crawler width direction H.

Further, the steel cord layer 27 and the lug 23 may be omitted.
Furthermore, in each said embodiment, although the wheel passing surface S shall be comprised by the top surface 26a of the protrusion part 26, it is not restricted to this. For example, the wheel passing surface may be formed separately on the inner peripheral surface side of the crawler main body at a portion located on the outer side in the crawler width direction than each protruding portion of the cored bar.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

20 Rubber crawler 21 Crawler main body 21a Inner peripheral surface 21b Outer peripheral surface 22, 40, 50, 60 Core metal 25 Wing part 26 Protruding part 28 Inner protrusion 29 Outer protrusion 31, 32 Opposite surface

Claims (2)

An endless belt-shaped crawler body made of rubber material;
A plurality of metal cores disposed at intervals in the crawler circumferential direction on the crawler body,
The core bar includes a wing portion embedded in the crawler body, and a pair of protrusion portions protruding from the wing portion toward the inner peripheral surface side of the crawler body,
The protrusion includes an inner protrusion protruding from the wing part toward one side in the crawler circumferential direction, and an outer protrusion protruding from the wing part toward the other side in the crawler circumferential direction,
A pair of the inner protrusions in the core metal located on the other side is disposed between the pair of outer protrusions in the core metal located on the one side among the core bars adjacent in the crawler circumferential direction. Rubber crawler,
Among the core bars adjacent in the crawler circumferential direction, in each of the inner protrusion and the outer protrusion adjacent in the crawler width direction, the distance in the crawler width direction between the facing surfaces facing each other in the crawler width direction is over the entire area. Rubber crawler characterized by being equivalent. The rubber crawler according to claim 1,
In the longitudinal sectional view along both the crawler width direction and the thickness direction of the crawler body, the inner protrusion and the outer protrusion adjacent to each other in the crawler width direction are projected in the thickness direction between the facing surfaces. A rubber crawler characterized by extending in an inclined manner with respect to the thickness direction so that they overlap each other.

Images