JPH06329058A - Rubber crawler - Google Patents

Abstract

PURPOSE:To provide a rubber crawler of simple structure enabling the prevention of vibration and lateral dislocation caused by the random movement of core metals and also enabling smooth transfer between rolling wheel rolling protrusions without the generation of noise. CONSTITUTION:The exposed parts of cross direction core metals 2 embedded at equal spaces apart in a rubber crawler 1 are provided with circumferential rolling wheel rolling protrusions 3, and each rolling wheel rolling protrusion 3 is extended so far as to cover a part of the adjacent core metal 2 in the overlapped state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler used for construction vehicles, agricultural vehicles or leisure vehicles, and more particularly to a rubber crawler capable of preventing vibration and lateral slippage due to delusion of a cored bar. It is a thing.

[0002]

2. Description of the Related Art Conventionally, a rubber crawler used for a construction vehicle, an agricultural vehicle, or a leisure vehicle has exposed a cored bar 2 in a width direction embedded in a rubber crawler 1 at equal intervals, as shown in FIG. Roller rolling projections 8 having a short circumferential length are provided on both sides of the sprocket hole 4 on the rubber crawler center line in opposite directions. The portion of the cored bar located between these reverse rolling rolling projections 8 and 8 is formed on the arc surface 6 with which the tooth bottom of the sprocket (not shown) meshes, and the cored bar portion other than these exposed parts is The embedded portion 9 is embedded in the rubber crawler. FIG. 9 is a sectional view of the center line of the rubber crawler 1 of FIG.
The side surface of the rolling contact rolling projection 8 and the embedded portion 9 are well shown. In such a conventional rubber crawler, when the rolling wheel 7 rolls on the rolling rolling protrusions 8 as shown in FIG. 9, the vehicle load F causes the core metal 2 to receive a rotational force as indicated by an arrow. It will be twisted inside the rubber crawler 1. As a result, the core metal 2 not only causes a vibration in the rubber crawler 1 and causes vibration, but also the transfer of the rolling wheel 7 to the rolling roller rolling projection 8 of the adjacent core metal is not smoothly performed, and abnormal noise is generated. It could cause it.

Further, as shown in FIG. 10, when an external force (arrow F) opposite to that of another core metal 2 acts on one core metal 2 for some reason during traveling on a slope or in a rough land, this The portion of the rubber crawler 1 on which the cored bar 2 is located is laterally displaced, causing so-called lateral displacement, which in the worst case may cause the rolling wheels and the sprockets to be disengaged. The same applies to the case of FIG. 11, but shows that the rubber crawler 1 has an arcuate shape in a plan view due to a gentle lateral displacement. Here, the cored bars 2 and 2 are located radially with substantially the same center. In such a case, although the rolling wheels and the sprockets are not separated, the rubber crawler 1 is no longer smoothly driven.

[0004]

Therefore, according to the present invention, various problems in the conventional rubber crawler as described above can be solved, vibration and lateral displacement due to delusion of the cored bar can be prevented, and transfer between rolling wheel rolling protrusions can be prevented. (EN) Provided is a rubber crawler which can be smoothly operated and does not generate any abnormal noise and has a simple structure.

[0005]

For this reason, according to the present invention, circumferential roller rolling protrusions are provided on the exposed portions of the widthwise cored bar embedded in the rubber crawler at equal intervals, and the roller rolling protrusions are adjacent to each other. It is characterized in that it is extended to cover a part of the cored bar. The rolling contact rolling protrusion may be provided adjacent to the outer side in the width direction of a normal rolling contact rolling protrusion having a short circumferential length, or may be disposed adjacent to the outer side in the width direction of the separation preventing protrusion. Further, a reduced diameter portion may be formed on the arc surface of the adjacent core metal, and an arcuate concave portion adapted to the reduced diameter portion may be formed in an overlapping portion of the rolling wheel rolling projection with the adjacent core metal. is there.

[0006]

According to the present invention, the rolling wheel rolling projections in the circumferential direction are provided on the exposed portions of the core metal in the width direction embedded in the rubber crawler at equal intervals, and the rolling wheel rolling projections overlap and overlap a part of the adjacent core metal. Even if the rolling wheel rolls on the rolling-wheel rolling projections, the vehicle load acting on the rolling-wheel rolling projections from the rolling-wheels will be adjacent to the core metal through the rolling-wheel rolling projections. The cored bar is not twisted in the rubber crawler because it is supported and shared by the core crawler. Therefore, the vibration due to the delusion of the core metal does not occur. Further, the transfer between the rolling elements of the rolling wheels can be smoothly changed, and the generation of abnormal noise can be eliminated. Furthermore, since the rolling contact of the rolling wheels is adapted to and overlaps the adjacent cores, the proximity between the adjacent cores,
The separation is unlikely to occur, and the rubber crawler is not displaced laterally in an arc shape. In addition,
Provided adjacent to the outer side in the width direction of a normal rolling rolling protrusion having a short circumferential length, or adjacent to the outer side in the width direction of the separation prevention protrusion, or forming a reduced diameter portion on the arc surface of the adjacent core metal. Then
In the case where an arcuate recess adapted to the reduced diameter portion is formed in the overlapping portion of the rolling wheel rolling projection with the adjacent core metal, the displacement in the width direction between the adjacent core metals interferes with each other. Since this can be prevented, lateral slippage at a part of the rubber crawler can be effectively prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which a sprocket hole 4 arranged along the center line is sandwiched between the exposed portions of a cored bar 2 in the width direction embedded in a rubber crawler 1 at equal intervals. The rolling roller rolling protrusions 3 in the circumferential direction are alternately provided in a zigzag pattern. The roller rolling protrusions 3 are provided in the same circumferential direction, but it goes without saying that the direction can be selected as appropriate. The rolling element rolling projection 3 has a base portion at one side end portion of the exposed portion which is the arc surface 6 of the core metal 2. As is apparent from the side view of FIG. A circular arc concave portion 5 is formed which extends and covers a part of the corresponding circular arc surface 6 of the adjacent core metal 2 and which fits the corresponding circular arc surface 6 of the adjacent core metal 2. The outer side of the arcuate surface 6 of the cored bar 2 on which the rolling wheel rolling projections 3 are provided is a flat plate-shaped embedded portion 9 which is completely embedded in the rubber crawler 1. In the rubber crawler 1 configured as described above, even if the rolling wheels 7 roll on the rolling rolling protrusions 3 as shown in FIG. 3, they act on the rolling rolling protrusions 3 from the rolling wheels 7. Since the vehicle load is supported and shared by the cored bar 2 adjacent to each other through the arcuate concave portion 5 and the arcuate surface 6 through the rolling roller rolling protrusion 3 which is sufficiently extended, the cored bar 2 in the rubber crawler 1 is supported. There is no twist. Therefore, since the roller rolling protrusions 3 are kept substantially horizontal, vibration due to the delusion of the core metal 2 is not generated, and the transfer between the roller rolling protrusions 3 can be smoothly performed, and no abnormal noise is generated. It is a thing. Moreover, since the rolling contact rolling projection 3 has the arcuate concave portion 5 and conforms to and overlaps the arcuate surface 6 of the adjacent core metal 2, the adjacent core metals 2 and 2 are prevented from approaching and separating from each other. It ’s hard to occur, so
As shown in FIG. 11, the rubber crawler 1 is not laterally displaced in an arc shape.

FIG. 4 shows a second embodiment of the present invention, in which the rolling element rolling protrusion 3 is provided adjacent to the outer side in the width direction of a normal rolling element rolling protrusion 8 having a short circumferential length. It is a thing. The normal rolling wheel rolling projections 8 having a short circumferential length are arranged along the center line on the left and right of the arc surface 6 which is the exposed portion of the core metal 2 in the width direction embedded in the rubber crawler 1 at equal intervals. The rolling roller projections 3 are provided in a zigzag pattern in opposite directions with the sprocket holes 4 sandwiched therebetween, and the rolling contact rolling projections 3 are adjacent to the outer side in the width direction of the normal rolling contact rolling projections 8 having a short circumferential length. Face 6
The exposed exposed portion has a base portion at one side end thereof, and a tip portion of the exposed exposed portion extends in the circumferential direction and overlaps a part of the corresponding arc surface 6 of the adjacent core metal 2, and the adjacent core metal. The circular arc concave portion 5 that fits the corresponding circular arc surface 6 of 2 is formed.
The outer roller rolling protrusions 3 and 3 are provided in a zigzag pattern in the opposite directions to each other in the same manner as the roller rolling protrusions 8 and 8 in one core metal 2, and have a pair of roller rolling protrusions 3 and 3. Core metal 2
The roller rolling protrusions 3 and 3 are not provided, and the core metal 2 having only the roller rolling protrusions 8 and 8 are alternately embedded. As will be described later, this arrangement can be appropriately arranged as long as the adjacent cores do not laterally shift from each other. A flat plate-shaped embedding portion 9 is formed on the outer side in the width direction of the arcuate surface 6 of the cored bar 2 on which the rolling wheel rolling projections 8 and 3 are provided, and is completely embedded in the rubber crawler 1. In the rubber crawler 1 configured as described above, the core metal 2 is not twisted in the rubber crawler 1 as in the first embodiment. Therefore, since the roller rolling protrusions 3 are kept substantially horizontal, vibration due to the delusion of the core metal 2 is not generated, and the transfer between the roller rolling protrusions 3 can be smoothly performed, and no abnormal noise is generated. It is a thing. Moreover, since the rolling contact rolling projection 3 has the arcuate concave portion 5 and conforms to and overlaps the arcuate surface 6 of the adjacent core metal 2, the adjacent core metals 2 and 2 are prevented from approaching and separating from each other. It is unlikely to occur, and the rubber crawler 1 is not laterally displaced in an arc shape. Further, even if only one core metal 2 is displaced in the width direction for some reason, the tips of the outer roller rolling protrusions 3 and 3 come into contact with the inner roller rolling protrusion 8 adjacent to and interfere with each other. The lateral displacement as shown in FIG. 10 does not occur.

FIG. 5 shows a third embodiment of the present invention, in which rolling rollers arranged on the outer side in the width direction of normal short rolling roller projections 8 arranged in zigzag in opposite directions. The rolling wheel rolling projections 3 and 3 are further provided on the outer side of the projection 3 in the width direction, and the rolling rolling projections 3 and 3 inside and outside the width direction are provided.
When one is provided on one cored bar, the cored bar 2 of one type can be embedded as an adjacent cored bar by reversing the direction by extending in opposite directions in the circumferential direction. With this configuration, only one type of core metal 2
By simply preparing, the rubber crawler 1 is not laterally displaced in an arc shape, or only one core metal 2 is laterally displaced,
Further, vibration due to the delusion of the cored bar 2 is not generated. Then, the transfer between the roller rolling protrusions 3 can be smoothly performed, and the generation of abnormal noise is eliminated. 9 is a flat plate-like embedded portion on the outer side of the arcuate surface 6, which is completely embedded in the rubber crawler 1, as in the above-described embodiment.

FIG. 6 shows a fourth embodiment of the present invention, in which a reduced diameter portion 10 is formed on an arcuate surface 6 of an adjacent core metal 2 and an arcuate concave portion 5 adapted to the reduced diameter portion 10 is rolled. It is formed in the overlapping portion of the tip of the wheel rolling projection 3 with the adjacent core metal 2, so that the rolling roller projection 3 does not easily come close to or separate from the adjacent metal cores 2, 2. The crawler 1 will not be laterally displaced in an arc shape. Further, even if only one core metal 2 is displaced in the width direction for some reason, the diameter reduction provided by the arcuate surface 6 of the core metal 2 in which the arcuate concave portions 5 at the tips of the rolling roller projections 3 and 3 are adjacent to each other. Only a slight displacement in the width direction within the portion 10 is possible, and further displacement is prevented by the large diameter portion of the arcuate surface 6, and lateral displacement does not occur.

FIG. 7 shows a fifth embodiment of the present invention, in which the rolling contact rolling projections 3 are arranged on both sides of the sprocket holes 4 and 4 on the center line of the rubber crawler to prevent separation.
It is characterized in that it is provided adjacent to the outer side in the width direction of No. 1 and the outer rolling contact projections 3 and 3 may be provided further outside in the width direction of the rolling contact rolling projection 3. With such a configuration, the cored bar 2 is not twisted in the rubber crawler 1, and therefore, the roller rolling protrusions 3 are kept substantially horizontal, so that vibration due to delusion of the cored bar 2 is not generated. In addition, the transfer between the wheel rolling protrusions 3 and 3 can be smoothly performed, and the generation of abnormal noise is eliminated. Moreover, since the rolling contact rolling projection 3 has the arcuate concave portion 5 and conforms to and overlaps the arcuate surface 6 of the adjacent core metal 2, the adjacent core metals 2 and 2 are prevented from approaching and separating from each other. It is unlikely to occur, and the rubber crawler 1 is not laterally displaced in an arc shape. Further, even if only one core metal 2 is displaced in the width direction for some reason, the tips of the outer rolling contact rolling projections 3 and 3 come into contact with and interfere with the adjacent inner rolling contact rolling projections 3 and 3. Moreover, since the inner rolling contact rolling projections 3 and 3 come into contact with the separation preventing projections 11 and interfere with each other, the cored bars 2 do not laterally shift from each other. In the present invention, other appropriate arrangement of the rolling element rolling protrusions 3 can be selected without departing from the concept.

[0012]

As described above, according to the present invention, the rolling roller rolling projections in the circumferential direction are provided on the exposed portions of the core metal in the width direction embedded in the rubber crawler at equal intervals, and the rolling wheel rolling projections are adjacent to each other. By extending so as to cover a part of the core metal, even if the rolling wheel rolls on the rolling rolling protrusion, the vehicle load acting on the rolling rolling protrusion from the rolling wheel is Since the core metal is supported by the adjacent core metal via the moving protrusion, the core metal is not twisted in the rubber crawler.
Therefore, the vibration due to the delusion of the core metal does not occur. Further, the transfer between the rolling elements of the rolling wheels can be smoothly changed, and the generation of abnormal noise can be eliminated. Further, since the rolling contact projections of the rolling wheels are adapted to and overlap with the adjacent cores, it is difficult for the adjacent cores to come close to each other or to be separated from each other, and the rubber crawler is not laterally displaced in an arc shape. Is. In addition, the rolling contact rolling protrusion is provided adjacent to the outer side in the width direction of a normal rolling contact rolling protrusion having a short circumferential length, or adjacent to the outer side in the width direction of the separation prevention protrusion, or the adjacent core metal When a reduced diameter portion is formed on an arc surface and an arc concave portion that matches the reduced diameter portion is formed in the overlapping portion of the rolling rolling protrusion with the adjacent core metal, the width between adjacent core metals Since the displacement in the direction can be prevented by interfering with each other, the lateral displacement in a part of the rubber crawler can be effectively prevented.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a plan view of a rubber crawler.

FIG. 2 is a side view of FIG.

FIG. 3 is a side view showing how the rolling wheels of the present invention are subjected to load sharing by the rolling wheels.

FIG. 4 is a plan view showing a second embodiment.

FIG. 5 is a plan view showing a third embodiment of the present invention.

FIG. 6 is a plan view showing a fourth embodiment of the present invention.

FIG. 7 is a plan view showing a fifth embodiment of the present invention.

FIG. 8 is a plan view of a rubber crawler using a conventional cored bar.

9 is a side view of a cross section taken along the line AA of FIG.

FIG. 10 is a plan view of a conventional rubber crawler in which one of the cores is displaced to cause lateral displacement.

FIG. 11 is a plan view of a conventional rubber crawler in a state in which the whole is laterally displaced in an arc shape.

[Explanation of symbols]

 1 rubber crawler 2 core metal 3 rolling wheel rolling projection 4 sprocket hole 5 arcuate concave section 6 circular arc surface 7 rolling wheel 8 rolling wheel rolling projection 9 embedded section 10 reduced diameter section 11 detachment prevention projection

Claims (7)

[Claims] 1. A rolling crawler rolling projection in the circumferential direction is provided on an exposed portion of a cored bar in the width direction embedded in a rubber crawler at equal intervals, and the rolling crawler rolling projection extends until it overlaps a part of an adjacent cored bar. A rubber crawler characterized by being installed. 2. The rubber crawler according to claim 1, wherein an overlapping portion of the rolling roller rolling projection with the adjacent core metal is an arc recessed portion that conforms to an arc surface of the adjacent core metal. 3. The rubber crawler according to claim 1, wherein the roller rolling protrusion is provided adjacent to an outer side in the width direction of a normal roller rolling protrusion having a short circumferential length. 4. The rubber crawler according to claim 3, wherein a rolling wheel rolling projection is further provided on the outer side in the width direction of the rolling wheel rolling projection. 5. When providing each rolling wheel rolling projection inside and outside in the width direction on one cored bar, one type of cored bar is reversed by extending in opposite directions in the circumferential direction. The rubber crawler according to claim 4, wherein the rubber crawler can be embedded as an adjacent core metal. 6. A reduced diameter portion is formed on an arc surface of the adjacent core metal, and an arc concave portion adapted to the reduced diameter portion is formed in an overlapping portion of the rolling wheel rolling protrusion with the adjacent core metal. The rubber crawler according to claim 2. 7. The rubber crawler according to claim 1, wherein the rolling wheel rolling protrusions are provided adjacent to widthwise outer sides of the separation preventing protrusions on both sides of the sprocket hole on the rubber crawler center line.