JP5836627B2 - Crawler mandrel and elastic crawler - Google Patents

Description

  The present invention relates to a core metal for a crawler and an elastic crawler using the same.

  Endless rubber crawlers are used in the running sections of agricultural machinery, construction machinery and civil engineering machinery.

  A rubber crawler is usually used by being wound around a sprocket, an idler and a wheel of a vehicle. Since these sprockets, idlers, and rollers roll on the inner peripheral side of the rubber crawler, reinforcing metal bars are arranged at regular intervals in the circumferential direction on the inner peripheral portion of the rubber crawler (for example, Patent Document 1).

  Patent Document 1 discloses an elastic crawler in which cored bars are arranged at regular intervals on the inner peripheral portion of an endless belt-like crawler body formed of an elastic body. Each core bar disposed on the elastic crawler is provided with a lateral regulation protrusion that protrudes in the circumferential direction of the crawler, and the lateral regulation projection of one core metal and the lateral regulation of the other core metal adjacent thereto. By contacting the protrusions, relative displacement (so-called lateral displacement) in the crawler width direction between adjacent cores is prevented.

  Further, the cored bar of Patent Document 1 is formed with a rail portion that extends in the crawler circumferential direction and extends the rolling surface of the rolling wheel on which the rolling wheel rolls. As a result, the distance between the rolling contact surfaces of the adjacent core bars is shortened (the gap is reduced), and when the wheel rolls (transfers) from one core to the other adjacent core. Thus, the amount of downward depression is reduced, and the vibration of the wheel is suppressed.

JP 2008-265369 A

  By the way, in patent document 1, since the horizontal regulation protrusion which protrudes in a crawler circumferential direction is formed in order to prevent a lateral shift, the rail part extended in a crawler circumferential direction is formed in order to suppress the vibration of a wheel. The core bar is heavy.

  An object of the present invention is to suppress an increase in weight while suppressing a lateral shift between adjacent core bars.

The core metal for a crawler according to claim 1 is disposed at an inner circumferential portion of an endless belt-like elastic body wound around the driving wheel and the rolling wheel with a space in the circumferential direction of the elastic body, and the width direction of the elastic body A long cored bar base, a projection formed on the cored bar base in a longitudinal direction of the cored bar base, the gap forming a passage space for the drive wheel, and the cored bar base of the projection A wheel support portion provided on the outer side in the body longitudinal direction, extending in the width direction of the core metal substrate and supporting a ring portion provided on the wheel, and one end of the wheel support portion in the core metal substrate width direction Rutotomoni provided on the side, is constituted by a protrusion protruding from one end of the metal core substrate width direction, engages the engaged portion of the rolling wheel support portion adjacent to one circumferential direction of the elastic member and the engaging portion, the rolling wheel support portion of the metal core substrate width direction of the other end provided on the side Rutotomoni, the protrusions Consists of only inserting recess, have a, and the engaged portion to be engaged with the engaging portion of the elastic body in the circumferential direction of the rolling wheel support portion adjacent to the other, on the projection side of the recess, the Protruding in the protruding direction of the protrusion and extending in the width direction of the core metal base, an inner bulge portion is provided which contacts the ring portion and restricts the movement of the ring portion in the longitudinal direction of the core metal base body. The portion was protruded in the width direction of the core metal base from the edge in the width direction of the core metal base.

In the core for crawlers according to claim 1 (hereinafter referred to as “core” as appropriate), the engaged portion of the wheel support portion adjacent to one of the engaging portion of the wheel support portion and the elastic body circumferential direction is provided. And the engaged part of the wheel support part and the engaging part of the wheel support part adjacent to the other in the circumferential direction of the elastic body engage with each other. Relative displacement (lateral deviation) in the gold longitudinal direction (width direction of the elastic body) is suppressed. Thereby, the lateral shift | offset | difference of adjacent cored bars can be suppressed.
The “engagement” between the engaging portion and the engaged portion referred to here is that the engaging portion and the engaged portion are moved by applying a force that laterally shifts adjacent core bars. Both the case where the engagement state is established and the case where the engagement portion and the engaged portion are in the engagement state are included even when a lateral displacement force is not applied.

  Moreover, in the said metal core, since the engaging part is provided in the one end side of the metal core base | substrate width direction of a wheel support part, and the to-be-engaged part is provided in the other end side, for example, a wheel support part is The increase in the weight of the cored bar can be suppressed as compared with the case where a protrusion for preventing lateral displacement is provided at another part.

  From the above, according to the metal core of claim 1, it is possible to suppress a lateral shift between adjacent metal cores and to suppress an increase in weight.

Further , the engaging portion is formed as a convex portion protruding from one end portion in the core metal substrate width direction of the wheel support portion, and the engaged portion is formed at the other end portion in the core metal substrate width direction of the wheel support portion. Since it is set as the recessed part which receives a convex part, the lateral shift of adjacent cored bars can be suppressed reliably with a simple structure.

Furthermore , the movement of the ring portion in the longitudinal direction of the metal core is restricted by contacting the inner raised portion. Thereby, it can suppress that a ring | wheel part gets over a processus | protrusion.

The core metal for a crawler according to claim 2 is disposed at an inner peripheral portion of an endless belt-like elastic body wound around the driving wheel and the rolling wheel with a space in the circumferential direction of the elastic body, and the width direction of the elastic body A long cored bar base, a projection formed on the cored bar base in a longitudinal direction of the cored bar base, the gap forming a passage space for the drive wheel, and the cored bar base of the projection A wheel support portion provided on the outer side in the body longitudinal direction, extending in the width direction of the core metal substrate and supporting a ring portion provided on the wheel, and one end of the wheel support portion in the core metal substrate width direction A protrusion that protrudes from one end in the width direction of the core metal base and engages with an engaged portion of the roller support portion adjacent to one side in the circumferential direction of the elastic body. And the core support base is provided on the other end side of the core support base portion in the width direction of the core support base. An engaged portion that is formed at a second end portion in the width direction and that is configured by a concave portion that receives the convex portion, and that engages with an engaging portion of the roller support portion adjacent to the other in the circumferential direction of the elastic body; And projecting in the protruding direction of the projection, extending in the width direction of the core metal substrate, on the outer side in the longitudinal direction of the core metal base than the projection side of the recess, and in contact with the ring portion, An outer raised portion for restricting movement in the longitudinal direction of the core metal substrate was provided, and the outer raised portion was protruded in the width direction of the core metal substrate from an edge in the width direction of the core metal substrate.

In the core for crawlers according to claim 2 (hereinafter referred to as “core metal” as appropriate), the engaged portion of the wheel support portion adjacent to one of the engaging portion of the wheel support portion and the elastic body circumferential direction. And the engaged part of the wheel support part and the engaging part of the wheel support part adjacent to the other in the circumferential direction of the elastic body engage with each other. Relative displacement (lateral deviation) in the gold longitudinal direction (width direction of the elastic body) is suppressed. Thereby, the lateral shift | offset | difference of adjacent cored bars can be suppressed.
The “engagement” between the engaging portion and the engaged portion referred to here is that the engaging portion and the engaged portion are moved by applying a force that laterally shifts adjacent core bars. Both the case where the engagement state is established and the case where the engagement portion and the engaged portion are in the engagement state are included even when a lateral displacement force is not applied.
Moreover, in the said metal core, since the engaging part is provided in the one end side of the metal core base | substrate width direction of a wheel support part, and the to-be-engaged part is provided in the other end side, for example, a wheel support part is The increase in the weight of the cored bar can be suppressed as compared with the case where a protrusion for preventing lateral displacement is provided at another part.
From the above, according to the metal core of claim 2, it is possible to suppress lateral displacement between adjacent metal cores and to suppress an increase in weight.
Further, the engaging portion is formed as a convex portion protruding from one end portion in the core metal substrate width direction of the wheel support portion, and the engaged portion is formed at the other end portion in the core metal substrate width direction of the wheel support portion. Since it is set as the recessed part which receives a convex part, the lateral shift of adjacent cored bars can be suppressed reliably with a simple structure.
Further, the movement of the ring portion in the longitudinal direction of the cored bar is restricted by coming into contact with the outer raised portion. Thereby, it can suppress that the other ring part gets over a protrusion with respect to one ring part contact | abutted to an outer protruding part.
In the core metal for a crawler according to claim 3, a short projecting portion projecting to one side of the core metal base body width direction and a projecting amount of the short metal core base body width direction are projected to the other side of the core metal base body width direction. A long overhanging portion larger than the overhanging portion is provided, and the inner protruding portion is provided on each of one side and the other side with a center line passing through the center in the longitudinal direction of the core metal base as a boundary, and one inner protruding portion is provided While projecting to one side in the core metal substrate width direction, the other inner raised portion was projected to the other side in the core metal substrate width direction.
According to a fourth aspect of the present invention, there is provided a core for a crawler according to a fourth aspect, wherein the protrusion includes a short projecting portion projecting to one side in the core metal substrate width direction and a projecting amount to the other side in the core metal substrate width direction. A long overhanging portion larger than the overhanging portion is provided, and the outer protruding portion is provided on each of one side and the other side with a center line passing through the center in the longitudinal direction of the core metal substrate as a boundary, and one outer protruding portion is provided. While projecting to one side in the core metal substrate width direction, the other outer raised portion was projected to the other side in the core metal substrate width direction.

  The elastic crawler according to claim 5 is provided with an endless belt-like elastic body wound around the driving wheel and the rolling wheel, and an inner peripheral portion of the elastic body with a space in the circumferential direction of the elastic body. The core metal for crawlers according to any one of -4.

  In the elastic crawler according to claim 5, since the crawler cored bar according to any one of claims 1 to 4 is included, for example, compared with the one not having the crawler cored bar, The lateral displacement between adjacent core bars is suppressed and the increase in weight is suppressed.

  As described above, the core metal for a crawler and the elastic crawler of the present invention can suppress a lateral shift between adjacent core bars and can suppress an increase in weight.

The elastic crawler according to the first embodiment is a side view as viewed from the side (the crawler width direction). Is a plan view showing the inner peripheral portion of the elastic crawler according to the first embodiment. It is a perspective view of the crawler core metal according to the first embodiment. (A ) It is a top view of the metal core for crawlers concerning 1st Embodiment. (B) It is the front view of the core metal for crawlers which looked at the metal core for crawlers of Drawing 4 (A) from the direction of arrow 4B. (C) It is the side view of the core metal for crawlers which looked at the metal core for crawlers of FIG. 4 (B) from the arrow 4C direction. It is sectional drawing (XX sectional drawing of FIG. 2) which shows the cross section along the crawler width direction of the elastic crawler which concerns on 1st Embodiment. The elastic crawler according to the first embodiment is a side view as viewed from the side. It is a top view which shows the inner peripheral part of the elastic crawler which concerns on 2nd Embodiment of this invention. It is a perspective view of the core metal for crawlers concerning 2nd Embodiment of this invention. (A) It is a top view of the core metal for crawlers concerning 2nd Embodiment of this invention. (B) It is the front view of the core metal for crawlers which looked at the core metal for crawlers of FIG. 9 (A) from the arrow 9B direction. (C) It is the side view of the core metal for crawlers which looked at the metal core for crawlers of FIG. 9 (B) from the arrow 9C direction. It is sectional drawing (YY sectional view taken on the line of FIG. 7) which shows the cross section along the crawler width direction of the elastic crawler which concerns on 2nd Embodiment of this invention. It is the side view which looked at the elastic crawler concerning a 2nd embodiment of the present invention from the side. It is a top view which shows the inner peripheral part of the elastic crawler which concerns on 3rd Embodiment of this invention. It is a perspective view of the cored bar for crawlers concerning 3rd Embodiment of this invention. (A) It is a top view of the core metal for crawlers concerning 3rd Embodiment of this invention. (B) It is the front view of the core metal for crawlers which looked at the metal core for crawlers of FIG. 14 (A) from the arrow 14B direction. (C) It is the side view of the core metal for crawlers which looked at the metal core for crawlers of FIG. 14 (B) from the arrow 14C direction. It is sectional drawing (ZZ sectional view taken on the line of FIG. 12) which shows the cross section along the crawler width direction of the elastic crawler which concerns on 3rd Embodiment of this invention. It is the side view which looked at the elastic crawler concerning a 3rd embodiment of the present invention from the side. (A) It is a top view which shows the recessed part of the roller support part of the core metal for crawlers concerning other embodiment of this invention, and the convex part inserted in this. (B) It is a top view which shows the recessed part of the roller support part of the core metal for crawlers concerning other embodiment of this invention, and the convex part inserted in this.

(First embodiment)
Hereinafter , the crawler metal core and the elastic crawler according to the first embodiment will be described with reference to FIGS. 2, 5, and 6, a rubber body 12, a lug 14, and a rubber protrusion 16 described later formed of a rubber material are indicated by a two-dot chain line.

  As shown in FIG. 1, an endless rubber crawler 10 as an example of an elastic crawler according to the first embodiment includes a sprocket 100 as an example of a drive wheel of a crawler vehicle (for example, a tractor) and an example of an idler wheel. The idler 102 and a plurality of rolling wheels 104 disposed between the sprocket 100 and the idler 102 are used.

  In addition, as shown in FIG. 1, the sprocket 100 of this embodiment forms the tooth part 100B in the circumferential direction on the outer peripheral surface of the disk-shaped ring part 100A attached to the drive shaft of a crawler vehicle at regular intervals. is there. Further, the idler 102 of the present embodiment is a disc-like one that is rotatably supported by the crawler wheel, and the roller wheel 104 has a diameter larger than that of the shaft portion 104A at both axial ends of the shaft portion 104A that is rotatably supported by the crawler wheel. A pair of large ring portions 104B is formed.

  As shown in FIG. 1, a crawler traveling device 90 as a traveling portion of a crawler vehicle is configured by a sprocket 100, an idler 102, a wheel 104, and a rubber crawler 10 wound around these.

In this embodiment, the circumferential direction of the endless rubber crawler 10 (arrow S in the figure) is described as “crawler circumferential direction”, and the width direction of the rubber crawler 10 (arrow W in the figure) is “crawler width direction”. It describes. 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 (see FIG. 2).
In the present embodiment, the inside of the rubber crawler 10 (arrow IN in the figure) is described as “crawler inside”, and the outside of the rubber crawler 10 (arrow OUT in the figure) is described as “crawler outside”. In addition, the crawler outer side is paraphrased as the ground side of the rubber crawler 10, and the crawler inner side is the side opposite to the ground side of the rubber crawler 10 (anti-grounding side).

  As shown in FIGS. 1 and 2, the rubber crawler 10 has a rubber body 12 in which a rubber material is formed in an endless belt shape. In addition, the rubber body 12 of this embodiment is an example of the elastic body of the present invention. Further, the width direction, the circumferential direction, the inner side, and the outer side of the endless rubber body 12 of the present embodiment are coincident with the crawler width direction, the crawler circumferential direction, the crawler inner side, and the crawler outer side, respectively.

As shown in FIGS. 2 and 5, a crawler core 20 (hereinafter, simply referred to as “core 20”) according to the first embodiment is disposed in the crawler circumferential direction on the inner peripheral portion of the rubber body 12. A plurality are arranged with an interval (a constant interval in this embodiment).

  As shown in FIGS. 2 and 5, the cored bar 20 is disposed on the inner peripheral portion of the rubber body 12 and extends in the crawler width direction (width direction of the rubber body 12) and becomes longer in the crawler width direction. A substrate 21 is provided. The longitudinal direction of the core metal base 21 (hereinafter referred to as “core metal longitudinal direction”) and the width direction of the rubber body 12 (crawler width direction) coincide with each other. Further, the width direction of the core metal base 21 (hereinafter referred to as “core width direction”) is a flat portion of the rubber crawler 10 (excluding a curved portion wound around the sprocket 100 or the idler 102). 1, for example, the portion indicated by the symbol F in FIG. 1) and the circumferential direction (crawler circumferential direction) of the rubber body 12. For this reason, in FIGS. 3 and 4, the core metal longitudinal direction is indicated by an arrow W, and the core metal width direction is indicated by an arrow S.

  As shown in FIGS. 3 and 4, the cored bar base 21 includes a central part 22 in the longitudinal direction of the cored bar and a pair of wing parts 24 extending from both ends of the central part 22 in the longitudinal direction of the cored bar. It consists of

  The central portion 22 is a portion with which the sprocket 100 is engaged, and is engaged with the sprocket 100 to input a driving force, so that the central portion 22 is thicker in the core metal thickness direction than the wing portion 24. Here, the “core metal thickness direction” is a direction perpendicular to the core metal longitudinal direction and the core metal width direction, and in the flat portion F of the rubber crawler 10, the thickness direction of the rubber body 12 ( Crawler inside and outside direction).

  As shown in FIGS. 3 and 4A, a straight line (hereinafter referred to as a center line CL) passing through the center of the central portion 22 of the central portion 22 of the core metal 20 and the center of the rubber body 12 in the width direction. The straight line passing through (the center line of the rubber body 12) matches. That is, the center line CL of the cored bar 20 coincides with the center line of the rubber crawler 10.

  The metal core 20 is provided on the metal core substrate 21 with a space in the longitudinal direction of the metal core, and has a pair of protrusions 26 that form a passage space for the sprocket 100. The protrusion 26 is formed at the base portion of the wing portion 24 and protrudes inward from the center portion 22 along the core metal thickness direction. The sprocket 100 passing between the pair of protrusions 26 is in contact with the inner wall of the protrusion 26 on the inner side in the longitudinal direction of the core metal so that the movement in the longitudinal direction of the core metal is restricted.

  As shown in FIGS. 3 and 4C, the protrusion 26 has a protrusion tip 26B projecting on both sides in the core metal width direction from the protrusion middle part 26A in a side view of the metal core (viewed from the longitudinal direction of the metal core). It is a shape. Specifically, as shown in FIG. 4C, the protrusion tip portion 26 </ b> B is from a straight line passing through the center of the central portion 22 of the core bar 20 in the core bar width direction (hereinafter referred to as a center line XL). Is longer on the other side than on one side in the core width direction. In the following description, a portion of the protrusion tip portion 26B that protrudes to one side in the core metal width direction is referred to as a short overhang portion 26C, and a portion that protrudes to the other side in the core metal width direction is referred to as a long overhang portion 26D.

  As shown in FIG. 4A, the pair of protrusions 26 are disposed so as to be rotationally symmetric with respect to an intersection P between the center line CL and the center line XL of the cored bar 20.

Incidentally, the projections 26 of the present embodiment, although the projecting tip portion 26B than projections abdominal 26A in the core metal side view has a shape protruding on both sides metal core width direction is not limited to the configuration of this, for example, The protrusion 26 may have a shape that tapers from the base of the protrusion toward the tip of the protrusion in a side view of the cored bar. The pair of protrusions 26 of this embodiment has been arranged so as to be rotationally symmetrical about the intersection point P, not limited to the configuration of this, symmetrical with respect to the center line CL of the core metal 20 It may be arranged so that.

As shown in FIGS. 3 and 4A, the core metal 20 is provided on both outer sides in the longitudinal direction of the core metal with the pair of protrusions 26 of the core metal base 21 interposed therebetween, and extends in the core metal width direction. A pair of wheel support portions 28 that support the pair of wheel portions 104B. The crawler inner surface 28A (hereinafter referred to as “rolling wheel support surface 28A”) of the roller support portion 28 is flat, and rolls while the outer peripheral surface of the wheel portion 104B is in contact therewith. It has become.
Here, the “core metal longitudinal direction outside” refers to a side separated from the center line CL along the core metal longitudinal direction, and the “core metal longitudinal direction inside” refers to the center line CL along the center line CL. It points to the side toward the line CL.

  As shown in FIGS. 3 and 4A, an engaging convex portion 32 as an example of the engaging portion of the present invention is provided on one end side of the wheel support portion 28 in the core metal width direction. Specifically, the engaging convex portion 32 is formed at one end portion in the core metal width direction of the wheel support portion 28 and is a substantially rectangular parallelepiped protrusion protruding from the one end portion in the core metal width direction. Further, as shown in FIG. 4C, the crawler inner surface of the engaging convex portion 32 is continuous with the wheel support surface 28A of the wheel support portion 28 (continuous in this embodiment). The ring support surface 28A is extended in the core metal width direction.

  As shown in FIGS. 3 and 4A, an engaging recess 34 as an example of the engaged portion of the present invention is provided on the other end side of the wheel support portion 28 in the core metal width direction. . Specifically, the engaging recess 34 is formed at the other end portion of the wheel support portion 28 in the core metal width direction, extends from the other end portion along the core metal width direction, and is opened in the core metal thickness direction. It is considered a hollow. In the present embodiment, the other end of the wheel support portion 28 has a bifurcated shape, and the engaging recess 34 is formed by the bifurcated portion (hereinafter referred to as “bifurcated portion 36”). The engaging recess 34 of the roller support portion 28 has a length in the longitudinal direction of the core metal longer than the length of the engaging convex portion 32 in the longitudinal direction of the core metal, and as shown in FIG. The engaging convex part 32 of the adjacent wheel support part 28 can be received.

  As shown in FIG. 2, the engaging convex part 32 of the wheel support part 28 is inserted into the engaging concave part 34 of the wheel support part 28 adjacent to one side (one side) in the crawler circumferential direction. Further, the engaging convex portion 32 of the wheel supporting portion 28 adjacent to the other (other side) in the crawler circumferential direction is inserted into the engaging concave portion 34 of the wheel supporting portion 28. As described above, the cored bar 20 is disposed on the inner peripheral part of the rubber body 12 with an interval in the crawler circumferential direction with the engaging convex part 32 inserted into the engaging concave part 34.

  As shown in FIG. 6, when the engaging convex portion 32 of the wheel support portion 28 adjacent to the other in the crawler circumferential direction is inserted into the engaging concave portion 34 of the wheel support portion 28, the core metal is viewed from the side. The bifurcated portion 36 of the wheel support portion 28 and the engaging convex portion 32 of the adjacent wheel support portion 28 overlap each other.

  As shown in FIGS. 3 and 4A, in the present embodiment, the bifurcated portion 36 of the wheel support portion 28 is formed on the short extension portion 26C side of the protrusion 26 with the center line XL of the core metal 20 as a boundary. Is formed. However, the present invention is not limited to this configuration, and the bifurcated portion 36 of the wheel support portion 28 may be formed on the long overhanging portion 26D side of the protrusion 26 with the center line CL of the core metal 20 as a boundary.

  In addition, although a pair of wheel support part 28 of this embodiment is arrange | positioned so that it may become rotationally symmetrical centering | focusing on the intersection P of the metal core 20, this invention is not limited to this structure, You may arrange | position so that it may become left-right symmetric with respect to the centerline CL.

  As shown in FIG. 5, the crawler outer side portion including at least the pair of wing portions 24 of the core metal 20 is embedded in the inner peripheral portion of the rubber body 12. As shown in FIG. 6, the protrusion 26 is covered with a rubber material to form a rubber protrusion 16 that protrudes inside the crawler on the inner peripheral portion of the rubber body 12. The rubber protrusion 16 has a substantially trapezoidal shape when viewed from the crawler width direction.

  As shown in FIG. 2, an engagement recess 40 in which the tooth portion 100 </ b> B of the sprocket 100 is inserted and engaged between the central portions 22 of the core bars 20 adjacent to each other in the crawler circumferential direction is formed on the inner peripheral portion of the rubber body 12. Is formed. The engaging recess 40 is closed at the bottom with a rubber material. In other embodiments according to the present invention, a slit (notch) that penetrates into and out of the crawler may be formed at the bottom of the engagement recess 40, and the rubber body 12 may be replaced with the engagement recess 40. A through-hole penetrating in and out of the crawler may be formed, and the tooth portion 100B may be inserted into and engaged with the through-hole.

  Here, when the sprocket 100 rotates (drives) in a state where the tooth portion 100B of the sprocket 100 is inserted into and engaged with the engagement recess 40, the engagement recess 40 in which the tooth portion 100B is engaged (contacted) is formed. A driving force is input to the central portion 22 of the cored bar 20 through the rubber wall in the crawler circumferential direction, and the driving force is transmitted to the rubber body 12 (rubber crawler 10).

  As shown in FIG. 5, an endless belt-shaped reinforcing layer 42 extending along the crawler circumferential direction is embedded on both sides of the crawler width direction with the engagement recess 40 interposed therebetween on the outer side of the crawler of the metal core 20 of the rubber body 12. . The reinforcing layer 42 is formed by rubber-covering one reinforcing cord spirally wound along the crawler circumferential direction or a plurality of reinforcing cords arranged in parallel along the crawler circumferential direction. In the present embodiment, a steel cord having excellent tensile strength is used as a reinforcing cord. However, the present invention is not limited to this configuration, and may be composed of, for example, organic fiber as long as it has sufficient tensile strength. A cord may be used as a reinforcing cord.

  As shown in FIG. 1, a plurality of lugs 14 made of a rubber material protruding outward from the crawler are formed on the outer peripheral portion of the rubber body 12 at intervals in the crawler circumferential direction. The lug 14 is a part that contacts the ground of the rubber crawler 10.

Next, the effect of the metal core 20 and the rubber crawler 10 of this embodiment will be described.
During traveling of the rubber crawler 10, the rubber crawler 10 wound around the sprocket 100, the idler 102, and the plurality of rollers 104 circulates between the sprocket 100, the idler 102, and the plurality of rollers 104. At this time, the sprocket 100 and the idler 102 pass through a passing space formed between the pair of protrusions 26, and as shown in FIG. 5, the pair of wheel portions 104 </ b> B of the wheel 104 is a pair of wheel support portions 28. Pass over.

  As shown in FIG. 2, in the cored bar 20 provided in plural on the rubber crawler 10, the engaging convex part 32 of the wheel support part 28 is formed with the engaging concave part of the wheel support part 28 adjacent to one side in the crawler circumferential direction. The engaging convex part 32 of the wheel support part 28 adjacent to the other in the crawler circumferential direction is inserted into the engaging concave part 34 of the wheel support part 28. For this reason, when the force which carries out relative displacement (lateral shift | offset | difference) of the adjacent metal cores 20 to the metal core longitudinal direction (crawler width direction) acts on the metal core 20, the side wall (side wall in the metal core longitudinal direction) of the engaging recess 34 And the side wall (the side wall in the longitudinal direction of the cored bar) of the engaging convex part 32 inserted into this are engaged (contacted), and the lateral shift between the adjacent wheel support parts 28 is suppressed. Here, in the present embodiment, as shown in FIG. 2, when the force causing the lateral displacement does not act between the adjacent core bars 20, the side wall of the engaging recess 34 is inserted into the side wall. The state where the side wall of the engaging convex portion 32 is not engaged (contacted) is maintained. In another embodiment of the present invention, the side wall of the engagement recess 34 and the engagement protrusion 32 inserted into the engagement recess 34 are not affected by the force that causes the lateral displacement between adjacent core bars 20. The side wall may be in an engaged (contacted) state.

  Here, in the metal core 20, the engaging convex part 32 is formed on one end side in the core metal width direction of the wheel support part 28 and the engaging concave part 34 is formed on the other end part. Compared with a structure in which a protrusion for preventing lateral deviation is formed at a part different from the wheel support part 28, an increase in the weight of the cored bar 20 can be suppressed.

  From the above, according to the cored bar 20, it is possible to suppress lateral displacement between adjacent cored bars 20 and to suppress an increase in weight.

Further, in the core metal 20 provided in plural on the rubber track 10, as shown in FIG. 6, the wheel support surface 28 </ b> A of the wheel support portion 28 and the wheel support portion 28 adjacent thereto are viewed from the crawler side view. Since the wheel support surface 28A intersects, when the wheel portion 104B of the wheel 104 is transferred from the wheel support portion 28 to the adjacent wheel support portion 28, the engaging convex portion of the wheel support portion 28 is engaged. Since the load from the wheel 104 is supported by the engaging recess 34 of the wheel support portion 28 adjacent to the wheel 32, the roller 104 is less likely to drop downward.
Thereby, the vibration of the wheel 104 when the wheel part 104B of the wheel 104 is transferred from one cored bar 20 to the other adjacent cored bar 20 is suppressed.

  Further, the cored bar 20 has a simple structure in which the engaging convex part 32 is formed on one end side in the cored bar width direction of the wheel support part 28 and the engaging concave part 34 is formed on the other end side. The lateral shift between the 20 can be reliably suppressed.

  Therefore, in the rubber crawler 10, since the above-described cored bar 20 is used, lateral displacement between adjacent cored bars 20 is suppressed, and further, an increase in weight is also suppressed.

(Second Embodiment)
Next, a crawler mandrel and an elastic crawler according to a second embodiment of the present invention will be described with reference to FIG.
This 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. Moreover, in FIG.7, FIG.10, FIG.11, the rubber body 12, the lug 14, and the rubber protrusion 16 which are formed with a rubber material are shown with the dashed-two dotted line.

  As shown in FIG. 1, a rubber crawler 50 according to the second embodiment is for a crawler according to a second embodiment, which will be described later, a rubber body 12 having the same configuration as the first embodiment, a lug 14, a reinforcing layer 42. A metal core 52 (hereinafter simply referred to as “core metal 52”). In the present embodiment, as in the first embodiment, the circumferential direction, the width direction, the inside, and the outside of the rubber crawler 50 are referred to as the crawler circumferential direction, the crawler width direction, the crawler inside, and the crawler outside, respectively.

  As shown in FIG. 7, a plurality of crawler cores 52 according to the second embodiment of the present invention are arranged on the inner peripheral portion of the rubber body 12 at intervals in the circumferential direction of the crawler (a constant interval in this embodiment). It is installed. Further, the cored bar 52 includes the cored bar base 21 having the same configuration as that of the first embodiment.

  In this embodiment, as in the first embodiment, the longitudinal direction of the core metal base 21 (hereinafter referred to as “core metal longitudinal direction”) and the width direction of the rubber body 12 (crawler width direction) coincide. ing. Further, the width direction of the core metal base 21 (hereinafter referred to as “core width direction”) is a flat portion of the rubber crawler 10 (excluding a curved portion wound around the sprocket 100 or the idler 102). 1, for example, the portion indicated by the symbol F in FIG. 1) and the circumferential direction (crawler circumferential direction) of the rubber body 12. For this reason, in FIGS. 8 and 9, the core metal longitudinal direction is indicated by an arrow W, and the core metal width direction is indicated by an arrow S.

  As shown in FIGS. 8 and 9, the cored bar 52 includes a pair of protrusions 26 having the same configuration as that of the first embodiment, and a pair of wheel support portions 28. Further, a straight line passing through the center in the longitudinal direction of the cored bar of the central part 22 of the cored bar 52 (hereinafter referred to as a centerline CL) coincides with a centerline passing through the center in the width direction of the rubber body 12. That is, the center line CL of the cored bar 52 coincides with the center line of the rubber crawler 50.

  Further, in the present embodiment, as shown in FIG. 9A, the bifurcated portion 36 of the wheel support portion 28 is formed on the short extension portion 26C side of the protrusion 26 with the center line XL of the core metal 20 as a boundary. Has been.

  As shown in FIGS. 8 and 9B, the protrusion 26 side of the bifurcated portion 36 constituting the engaging recess 34 of the wheel support portion 28 is raised in the protruding direction of the protrusion 26 (the arrow IN side in the figure). In addition, an inner raised portion 54 extending in the core metal width direction is provided. Specifically, the inner raised portion 54 is provided on the rail portion on the protrusion 26 side (inside the longitudinal direction of the core metal) of the pair of opposed rail portions constituting the bifurcated portion 36.

  Further, the inner raised portion 54 extends from the front end portion of the bifurcated portion 36 to the vicinity of the center line XL, and moves the wheel portion 104B in the longitudinal direction of the metal core passing through the wheel support surface 28A of the wheel support portion 28. The ring portion 104B is abutted and regulated.

Next, the effect of the metal core 52 and the rubber crawler 50 of this embodiment will be described.
In addition, the description about the effect similar to 1st Embodiment among the effects of this embodiment is abbreviate | omitted.

  As shown in FIG. 10, in the cored bar 52, since the inner raised portion 54 is provided on the protrusion 26 side of the bifurcated portion 36, the pair of wheel portions 104 </ b> B passing on the wheel support portion 28 toward the protrusion 26 side. Is restricted by abutting against the inner raised portion 54. In particular, as shown in FIG. 11, since the inner raised portion 54 extends to the short overhanging portion 26 </ b> C side of the protrusion 26, the movement of the ring portion 104 </ b> B in the longitudinal direction of the core metal causes the long overhanging portion of the protrusion 26. It is regulated by 26D and the inner raised portion 54. In other words, the movement of the ring portion 104B in the longitudinal direction of the core metal (crawler width direction) can be restricted within a wide range in the core metal width direction (crawler circumferential direction). It is possible to effectively suppress overcoming.

  Moreover, in 2nd Embodiment, although it is set as the structure by which the internal protruding part 54 is continuously extended in a metal core width direction, this invention is not limited to this structure, and the internal protrusion part 54 is intermittent in the metal core width direction. A configuration that extends (for example, a configuration in which a plurality of the inner raised portions 54 are provided intermittently in the core metal width direction) may be employed.

(Third embodiment)
Next, a crawler core bar and an elastic crawler according to a third embodiment of the present invention will be described with reference to FIG.
This 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. In FIG. 12, FIG. 15, and FIG. 16, the rubber body 12, the lug 14, and the rubber protrusion 16 formed of a rubber material are indicated by two-dot chain lines.

  As shown in FIG. 1, a rubber crawler 60 according to the third embodiment is a crawler for a crawler according to a third embodiment to be described later, a rubber body 12 having the same configuration as that of the first embodiment, a lug 14, a reinforcing layer 42. A metal core 62 (hereinafter simply referred to as “core metal 62”). In the present embodiment, as in the first embodiment, the circumferential direction, the width direction, the inside, and the outside of the rubber crawler 60 are referred to as the crawler circumferential direction, the crawler width direction, the crawler inside, and the crawler outside, respectively.

  As shown in FIG. 12, a plurality of crawler cores 62 according to the third embodiment of the present invention are arranged on the inner peripheral portion of the rubber body 12 with an interval in the crawler circumferential direction (a constant interval in this embodiment). It is installed. Further, the cored bar 62 has the cored bar base 21 having the same configuration as that of the first embodiment.

  In this embodiment, as in the first embodiment, the longitudinal direction of the core metal base 21 (hereinafter referred to as “core metal longitudinal direction”) and the width direction of the rubber body 12 (crawler width direction) coincide. ing. Further, the width direction of the core metal base 21 (hereinafter referred to as “core width direction”) is a flat portion of the rubber crawler 10 (excluding a curved portion wound around the sprocket 100 or the idler 102). 1, for example, the portion indicated by the symbol F in FIG. 1) and the circumferential direction (crawler circumferential direction) of the rubber body 12. For this reason, in FIGS. 13 and 14, the core metal longitudinal direction is indicated by an arrow W, and the core metal width direction is indicated by an arrow S.

  As shown in FIGS. 13 and 14, the cored bar 62 includes a pair of protrusions 26 having the same configuration as that of the first embodiment, and a pair of wheel support portions 28. A straight line passing through the center in the longitudinal direction of the central portion 22 of the central portion 22 of the cored bar 62 (hereinafter referred to as a centerline CL) and a centerline passing through the center in the width direction of the rubber body 12 are coincident. That is, the center line CL of the cored bar 62 coincides with the center line of the rubber crawler 60.

  Further, in the present embodiment, as shown in FIG. 14A, the bifurcated portion 36 of the wheel support portion 28 is formed on the long extension portion 26D side of the protrusion 26 with the center line XL of the core metal 20 as a boundary. ing. However, the present invention is not limited to this configuration, and the bifurcated portion 36 of the wheel support portion 28 may be formed on the short extension portion 26C side of the protrusion 26 with the center line CL of the core metal 20 as a boundary. .

  As shown in FIGS. 13 and 14B, the protrusion 26 protrudes in the protruding direction of the core 26 in the longitudinal direction outside the protrusion 26 side of the bifurcated portion 36 that constitutes the engaging recess 34 of the wheel support portion 28 (see FIG. 13B). An outer raised portion 64 is provided which protrudes toward the middle arrow IN side and extends in the core metal width direction. Specifically, the outer raised portion 64 is provided on the rail portion on the outer side in the longitudinal direction of the cored bar from the projection 26 side among the pair of opposed rail portions constituting the bifurcated portion 36.

  Further, the outer raised portion 64 extends from the front end portion of the bifurcated portion 36 to the vicinity of the center line XL, and moves the wheel portion 104B in the longitudinal direction of the metal core passing through the wheel support surface 28A of the wheel support portion 28. The ring portion 104B is abutted and regulated.

Next, the effect of the metal core 62 and the rubber crawler 60 of this embodiment will be described.
In addition, the description about the effect similar to 1st Embodiment among the effects of this embodiment is abbreviate | omitted.

  As shown in FIG. 15, in the core metal 62, the outer raised portion 64 is provided on the outer side in the core metal longitudinal direction with respect to the protrusion 26 side of the bifurcated portion 36, so that a pair of wheels passing over the roller support portion 28. The movement of the portion 104B to the outside in the longitudinal direction of the cored bar is restricted by contacting the outer raised portion 64. Moreover, as shown in FIG. 16, since the outer raised portion 64 extends in the core metal width direction, the movement of the ring portion 104B in the core metal longitudinal direction is suppressed in a wide range in the core metal width direction. Can do. In particular, when the rubber crawler 60 is inclined, even if the wheel portion 104B positioned on the lower side in the tilt direction is separated from the wheel support portion 28 positioned on the lower side in the tilt direction, the wheel portion 104B positioned on the upper side in the tilt direction. Is in contact with the outer raised portion 64 and movement in the longitudinal direction of the cored bar is restricted, so that it is effective that the ring portion 104B positioned on the lower side in the tilt direction rides on the rubber protrusion 16 positioned on the lower side in the tilt direction. Can be suppressed.

  Moreover, in 3rd Embodiment, although it is set as the structure which the outer protruding part 64 is extended continuously in a metal core width direction, this invention is not limited to this structure, and the outer protruding part 64 is intermittent in the metal core width direction. It is good also as an extended structure (for example, the structure which provides the outer protruding part 64 intermittently in the core metal width direction).

(Other embodiments)
In the first to third embodiments, the pair of protrusions 26 are arranged so as to be rotationally symmetric about the intersection point P, but the present invention is not limited to this configuration, and the intersection point P on the center line CL. You may arrange | position so that it may become rotationally symmetrical centering | focusing on the arbitrary points which do not contain. Similarly, in the first to third embodiments, the pair of wheel support portions 28 are arranged so as to be rotationally symmetric about the intersection point P. The present invention is not limited to this configuration, and may be arranged so as to be rotationally symmetric about an arbitrary point not including the intersection point P on the center line CL.

  In the second embodiment, an inner raised portion 54 is formed on the rail portion on the projection 26 side of the bifurcated portion 36, and in the third embodiment, an outer bulge is formed on the rail portion on the outer side in the longitudinal direction of the core metal from the projection 26 side of the bifurcated portion 36. Although the portion 64 is formed, the present invention is not limited to this configuration, and the inner raised portion 54 is formed in the rail portion on the projection 26 side of the bifurcated portion 36, and the core metal is longer than the projection 26 side of the bifurcated portion 36. It is good also as a structure which forms the outer protruding part 64 in the rail part of a direction outer side, and makes between the inner protruding part 54 and the outer protruding part 64 of the wheel support part 28 the passage space of the ring part 104B.

  In each of the embodiments described above, the engaging convex portion 32 is formed at one end of the wheel support portion 28 and the engaging concave portion 34 is formed at the other end, but the present invention is not limited to this configuration. 17A, a plurality of engaging convex portions 70 are formed at one end of the wheel support portion 28, and a plurality of engaging concave portions 72 are formed at the other end portion of the wheel supporting portion 28. As shown in FIG. Thus, the engaging convex part 70 of the wheel support part 28 may be inserted into the engaging concave part 72 of the wheel support part 28 adjacent to one side in the crawler circumferential direction.

  Further, in each of the above-described embodiments, the length in the longitudinal direction of the core metal of the engaging convex portion 32 of the wheel support portion 28 is substantially constant from the root portion to the tip portion, but the present invention is not limited to this configuration. The length in the longitudinal direction of the cored bar of the engaging convex part 32 may be shortened from the root part toward the tip part. Further, as shown in FIG. 17B, the tip 74A of the engaging convex portion 74 has a shape in which the length in the longitudinal direction of the core metal is made longer than the base 74B (the wheel support portion shown in FIG. 17B). 28, the tip 74A is circular, and the engaging recess 76 can be inserted only from the thickness direction of the cored bar (the wheel support portion 28 shown in FIG. 17B). In the plan view of the main part, the opening 76B has a shape corresponding to the root part 74B of the engaging convex part 74, the length in the longitudinal direction of the cored bar is shorter than the tip part 74A, and the intermediate part 76A is shorter than the tip part 74A. A large-diameter circular shape) may be employed. In this case, in addition to the lateral displacement of the adjacent roller support portions 28, the adjacent roller wheels are brought into contact with each other by contact (hook) of the tip 74 A of the engaging convex portion 74 and the opening 76 B of the engaging concave portion 76. It is also possible to suppress the separation of the support portions 28 from each other.

  In each of the above-described embodiments, the center line of the rubber body 12 and the center line CL of the cored bars 20, 52, 62 coincide, but the present invention is not limited to this configuration, and the center line of the rubber body 12 On the other hand, the center line CL of the core bars 20, 52, 62 may be shifted in the crawler width direction.

  In the above-described embodiment, the reinforcing layer 42 is embedded for reinforcing the rubber crawler 10. However, the present invention is not limited to this configuration, and the reinforcing layer 42 is not used, and adjacent to each other in the crawler circumferential direction. The metal cores 20 (52, 62) are connected to each other with a connection member (for example, a ring-shaped connection member), or the connection parts (for example, hooks and pins) formed on the metal core are connected to each other. The rubber crawler 10 may be reinforced with an endless cored bar.

  Furthermore, in the above-described embodiment, an example of the endless belt-like elastic body of the present invention is the rubber body 12 in which a rubber material is formed in an endless belt shape, but the present invention is not limited to this configuration, and an example of the elastic body is described above. As such, it may be a band-like body in which an elastomer other than rubber is formed in an endless band shape.

  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 Rubber crawler (elastic crawler)
12 Rubber body (elastic body)
20 Core (Crawler core)
26 Protrusions 28 Rolling wheel support portions 32 Convex portions (engaging portions or engaged portions)
34 Recess (engaged part or engaged part)
50 Rubber crawler (elastic crawler)
52 Core (Crawler core)
54 Inner protuberance 60 Rubber crawler (elastic crawler)
62 Core (Crawler core)
64 Outer bump 100 Sprocket (drive wheel)
104 Roller 104B Annulus CL Center line XL Center line S Crawler circumferential direction, core width direction W Crawler width direction, core metal longitudinal direction IN Crawler inside OUT Crawler outside

Claims (5)

A core metal base disposed at an inner circumferential portion of an endless belt-like elastic body wound around a drive wheel and a wheel at a distance in the circumferential direction of the elastic body, and long in the width direction of the elastic body;
Protrusions that are provided on the cored bar base so as to be spaced apart from each other in the longitudinal direction of the cored bar base, and the spacing forms a passage space for the drive wheel;
A wheel support portion provided outside the core metal base in the longitudinal direction of the protrusion, extending in a width direction of the core metal base, and supporting a wheel provided on the wheel;
The roller support portion is provided on one end side in the core metal substrate width direction of the roller support portion, and is configured by a convex portion protruding from one end portion in the core metal substrate width direction, and adjacent to one of the circumferential directions of the elastic body. An engaging portion that engages with an engaged portion of the wheel support portion;
Engagement of the roller support portion provided on the other end side in the core metal substrate width direction of the roller support portion and configured by a recess for receiving the protrusion, and adjacent to the other in the circumferential direction of the elastic body An engaged portion that engages with the portion;
Have
The protrusion protrudes in the protruding direction of the protrusion and extends in the width direction of the core metal base, contacts the ring portion, and restricts the movement of the ring portion in the longitudinal direction of the core metal substrate. A crawler core bar provided with an inner bulge portion and projecting the inner bulge portion from an edge in the width direction of the core metal substrate in the width direction of the core metal substrate. A core metal base disposed at an inner circumferential portion of an endless belt-like elastic body wound around a drive wheel and a wheel at a distance in the circumferential direction of the elastic body, and long in the width direction of the elastic body;
Protrusions that are provided on the cored bar base so as to be spaced apart from each other in the longitudinal direction of the cored bar base, and the spacing forms a passage space for the drive wheel;
A wheel support portion provided outside the core metal base in the longitudinal direction of the protrusion, extending in a width direction of the core metal base, and supporting a wheel provided on the wheel;
The roller support portion is provided on one end side in the core metal substrate width direction of the roller support portion, and is configured by a convex portion protruding from one end portion in the core metal substrate width direction, and adjacent to one of the circumferential directions of the elastic body. An engaging portion that engages with an engaged portion of the wheel support portion;
The roller support portion is provided on the other end side in the core metal substrate width direction of the roller support portion, and is configured by a recess formed on the other end portion in the core metal substrate width direction to receive the convex portion, and the circumferential direction of the elastic body An engaged part that engages with an engaging part of the wheel support part adjacent to the other of
Have
The core metal of the ring part protrudes in the protruding direction of the protrusion and extends in the width direction of the core metal base in the longitudinal direction outside the core metal base side of the protrusion side of the recess, and abuts against the ring part. A crawler core bar provided with an outer bulge portion that restricts movement in the longitudinal direction of the base body, and the outer bulge portion projecting in the width direction of the core bar base body from an edge in the width direction of the core bar base body. A short projecting portion projecting to one side in the core metal substrate width direction and a long projecting portion projecting to the other side in the core metal substrate width direction and having a projecting amount larger than the short projecting portion are formed on the protrusion. Provided,
The inner bulging portion is provided on each of one side and the other side with a center line passing through the center in the longitudinal direction of the core metal base as a boundary, and one of the inner ridges protrudes to one side in the width direction of the core metal base. The crawler core bar according to claim 1, wherein the other inner protruding portion is projected to the other side in the width direction of the core metal substrate . A short projecting portion projecting to one side in the core metal substrate width direction and a long projecting portion projecting to the other side in the core metal substrate width direction and having a projecting amount larger than the short projecting portion are formed on the protrusion. Provided,
The outer bulge portion is provided on each of one side and the other side with a center line passing through the center in the longitudinal direction of the core metal substrate as a boundary, and one of the outer bulge portions protrudes to one side in the width direction of the core metal substrate. In addition, the core for a crawler according to claim 2, wherein the other outer protruding portion protrudes to the other side in the core metal base width direction . An endless belt-like elastic body wound around the driving wheel and the rolling wheel;
The elastic crawler which has the metal core for crawlers of any one of Claims 1-4 arrange | positioned in the inner peripheral part of the said elastic body at intervals in the circumferential direction of the said elastic body.

Images