JPH09254836A - Rolling wheel for rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce the apparent frictional force between a rolling wheel and a projection by providing a rolling member which is so constructed that a part or the whole of its contact surface with a projection formed on the inner circumferential surface of a crawler for transmitting the driving force or preventing slip-off from a rolling wheel is capable of rotating independently of a rotating shaft of the rolling wheel. SOLUTION: A pair of disc-like rolling members 11 are disposed on a rolling wheel 10 and installed in regions striding over a projection 4 of the rolling wheel 10 through bearings 12. The rolling members 11 have inclined surfaces formed according to the inclination of the sides of the projection 4. The members 11 are adapted to freely rotate coaxially with the rotating shaft of the rolling wheel 10 by the bearings 12, and installed opposite to the right and left sides of the projection 4. Accordingly, if the lateral force acts between the rolling wheel 10 and the rubber crawler, the side surface of the projection 4 and the rolling member 11 come into contact with each other, and the contact force can be softened because the rolling members 11 are freely rotatable, so that the mutual abrasion can be reduced. Thus, a wheel dislocation preventing effect can be heightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a roller for a rubber crawler, and more particularly, to reduce wear of a roller and a protrusion and to remove a roller and a rubber crawler from each other. It relates to a wheel that prevents wheels.

[0002]

2. Description of the Related Art Generally, protrusions are continuously formed at a constant pitch on the inner peripheral surface of a rubber crawler in the longitudinal direction thereof, and the protrusions are used for transmitting driving force from a sprocket or rolling. It functions to prevent the wheel from coming off. In particular, in order to prevent disengagement from the rolling wheels, if the rubber crawler receives a lateral force and a relative displacement occurs with the rolling wheels, contact between the rolling wheels and the protrusions may occur. The collisions are repeated, and they try to restore this deviation to the original state.

11 to 12 show the inner peripheral surface of the rubber crawler 20 showing such a state, and FIG. 11 shows a shape in which a pair of protrusions 22 and 22 protrude from the inner peripheral surface of the endless rubber elastic body 21. The rolling wheel 30 normally has the protrusions 22, 22.
When the rubber crawler 20 and the rolling wheel 30 are misaligned with each other, the rolling wheel 30 has protrusions 22 and 22 as shown by a dotted line (only one is shown). When the vehicle comes into contact with or collides, the deviation of the rolling wheel 30 is regulated and the rolling surface is returned to the original rolling surface.

On the other hand, FIG. 12 shows a rubber crawler 20 in which one projection 22 is projected from the inner peripheral surface of an endless rubber elastic body 21, but when the rolling wheel 30 is also displaced from the normal rolling position. The roller 30 and the protrusion 22 contact each other as shown by the dotted line.
Repeated collisions will prevent misalignment.

[0005]

As described above, in the conventional rubber crawler, the lateral force applied to the rubber crawler is remarkably exhibited when the wheel makes a sharp turn or when the vehicle runs on a slope. Therefore, the rolling wheels are strongly pressed against the side surfaces of the projections, so that the rolling wheels and the projections are worn early, and the rolling wheels ride on the projections and the wheels may come off. Further, there is a drawback that running resistance becomes large due to a large frictional force between the rolling wheel and the side surface of the protrusion, and both of them have been problems to be solved conventionally.

[0006]

The present invention has been made to solve the above-mentioned drawbacks, and the gist thereof is to transmit a driving force formed on an inner peripheral surface of a crawler or a rolling wheel. A rolling wheel engaged with a side surface of a projection used for preventing disengagement, wherein a part or all of a contact surface with the projection includes a rolling member rotatable independently of a rotation shaft of the rolling wheel. The present invention relates to a roller for a rubber crawler, which is characterized in that

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Each of the above problems is caused by a large frictional force acting between the two wheels when a load is applied in the lateral direction of the vehicle and the rolling wheels are pressed against the projections. Is to reduce the apparent frictional force between the rolling wheel and the projection by using a rotatable rolling member for the portion of the rolling wheel that comes into contact with the projection to solve the above-mentioned problems.

Then, as a specific example of a preferable rolling wheel,
The rotation axis of the rolling member is coaxial with the rotation axis of the rolling wheel, or the rotation axis of the rolling member is substantially perpendicular to the rotation axis of the rolling wheel. In the latter, it is provided on the wheel side facing the side surface of the protrusion.

Taking the former case as an example, the rolling wheel is divided into two parts, a part in contact with the inner peripheral surface of the rubber crawler and a part provided inside thereof for preventing the projection from coming off, and then separated. The part provided for prevention is mounted on the part that straddles the projection of the wheel so as to be rotatable relative to each other via a bearing.

Now, while the vehicle is traveling while receiving a lateral load, the inner portion of the rolling wheel is strongly pressed against the side surface of the protrusion, but since this portion rotates freely, friction with the protrusion occurs. Is significantly reduced. Therefore, the wear of the rolling wheels and the projections is significantly reduced, the rolling wheels themselves are less likely to ride on the projections, and it is possible to prevent the wheels from falling off, which has a great effect of reducing the running resistance of the vehicle.

[0011]

The present invention will be described in more detail with reference to the following examples. FIG. 1 is a partial sectional view showing a first example of the present invention. In the figure, reference numeral 1 is a core metal, which is composed of left and right wing portions 3 embedded in a rubber elastic body 2 and a protrusion 4 protruding to the center of the inner peripheral surface of the rubber crawler. Then, the rolling wheel 10 is arranged so as to straddle the protrusion 4, and the tip of the rolling wheel 10 is rubber-crossed.
The car will come into contact with the inner surface of LA. This wheel 10
A pair of disk-shaped rolling members 11 are arranged inside the shaft, and are mounted on a portion of the rolling wheel 10 that straddles the protrusion 4 via a bearing 12. The rolling member 11 has an inclined surface formed in accordance with the inclination of the side surface of the protrusion 4. As described above, the bearing 12 is rotatable about the same axis as the rotating shaft of the wheel 10, and is mounted so as to face the left and right side surfaces of the protrusion 4. Therefore, when a lateral force is applied between the rolling wheel 10 and the rubber crawler, the side surface of the protrusion 4 comes into contact with the rolling member 11, so that the rolling member 11 is rotatable. As a result, the contact force is alleviated, mutual wear is reduced, and it is less likely to ride on the protrusion 4 and the occurrence of derailment is extremely reduced.

FIG. 2 is a partial sectional view showing a second example of the present invention. In the figure, an example in which a pair of protrusions 4 and 4 is formed on a core metal 1, a rolling wheel 10 is arranged so as to straddle the protrusions 4 and 4, and the tip of the rolling wheel 10 is a side surface of the protrusions 4 and 4. It will run while contacting the inner peripheral surface of the outer rubber crawler. This wheel 1
No. 0 has a rolling member 11 disposed between the pair of protrusions 4 and 4 inside thereof, and the bearing 1
2 is mounted. The rolling member 11 is adapted to fit between the protrusions 4 and 4. As described above, the bearing 12 allows the roller 10 to rotate coaxially with the axis of rotation of the roller 10.
If a lateral force is applied between the rubber roller and
The distance B between the rolling wheel 10 and the protrusion 4 is designed to be larger than the distance A between the rolling member 11 and the protrusion 4, so that the inner side surfaces of the protrusions 4 and 4 should be in contact with the rolling member 11. Since the rolling member 11 is rotatable here, its contact force is alleviated, mutual wear is reduced, and it is less likely to ride on the protrusions 4 and 4, and the occurrence of wheel loss is extremely small. Become.

FIG. 3 is a partial sectional view showing a third example of the present invention. In the figure, a pair of protrusions 4 and 4 is formed on the core metal 1, and a rolling wheel 10 is arranged so as to straddle the protrusions 4 and 4. The tip of the rolling wheel 10 is the top of the protrusions 4 and 4. This is an example of rolling traveling on a surface. A rolling member 11 is arranged on the inside of the rolling wheel 10 between the pair of projections 4 and 4 and is mounted on a portion of the rolling wheel 10 straddling the projection 4 via a bearing 12. In addition, as described above, this is an example in which the bearing 12 is rotatable coaxially with the rotation axis of the roller 10.

FIG. 4 is a partial sectional view showing a fourth example of the present invention. In the figure, a pair of protrusions 4 and 4 is formed on the core metal 1, and a rolling wheel 10 is arranged straddling the protrusions 4 and 4 as in FIG. 3, and the tip of the rolling wheel 10 is a protrusion. This is an example of rolling running on top surfaces of 4 and 4. A rolling member 11 is arranged on the inside of the rolling wheel 10 between the pair of projections 4 and 4. In this example, the rolling member 11 is sandwiched from both sides of the rolling wheel 10. Is installed through.

These are all rollers 10 and rubber wheels.
When a lateral force is applied between the rolling member 11 and the la, the inner side surfaces of the projections 4 and 4 come into contact with the rolling member 11, and the rolling member 11 is rotatable there. The contact force is relieved, mutual wear is reduced, and the protrusions 4 and 4 are less likely to be ridden on the protrusions 4 and the occurrence of derailment is extremely reduced.

FIG. 5 is a partial sectional view showing a fifth example of the present invention. Although the core bar and the protrusions are omitted in the figure, the rolling wheel 10 is arranged so as to straddle the protrusion of the core bar, and the tip of the rolling wheel 10 travels in contact with the inner peripheral surface of the rubber crawler. Become.
A roller-shaped rolling member 11 is arranged on the inside of the rolling wheel 10, and the rolling member 11 is provided on the circumference so as to face the side surface of the rolling member 11 with a projection interposed therebetween. Therefore, the wheel 1
When a force acts in the lateral direction between 0 and the rubber roller, the left and right outer side surfaces of the protrusion and the roller-shaped rolling member 11 come into contact with each other. Since the bearings are rotatable, their contact forces are relaxed, mutual wear is reduced, and riding on the protrusions is less likely to occur, and the occurrence of wheel loss is extremely reduced.

Although the above-mentioned roller-shaped rolling member 11 is shown as having the same upper and lower diameters, the side surface of the projection is usually an inclined surface, and therefore faces the inclined surface. Then, the roller-shaped rolling member 11 may be arranged as shown in FIG. Further, in some cases, the roller-shaped rolling member 11 itself may have a shape having an inclined surface as shown in FIG.

FIG. 8 is a partial sectional view showing a sixth example of the present invention. Although the cored bar and the projections are omitted in this figure, the rolling wheel 10 is arranged so as to straddle the projections of the cored bar, and a spherical body 13 (rolling member) is embedded inside the rolling wheel 10. This is an example of being held by the sphere holding plate 14. Therefore, when a lateral force is applied between the rolling wheel 10 and the rubber crawler, the sphere 1 which is rotatable with respect to the side surface of the protrusion.
As a result, they come into contact with each other, the contact force is eased, mutual wear is reduced, and moreover, they are less likely to ride on the protrusions and the occurrence of derailment is extremely reduced.

As described above, since the side surface of the protrusion is usually an inclined surface, the side surface of the protrusion is opposed to this inclined surface in FIG.
It is preferable that the spheres 13 are provided in a plurality of rows as shown in FIG.

FIG. 10 is a partial sectional view showing a seventh example of the present invention. Even in this figure, the cored bar, the protrusions, etc. are omitted. The rolling wheel 10 is arranged so as to straddle the protrusion of the core metal, and the rolling wheel 10 has an annular body 15 (rolling member) having an H-shaped cross section inside thereof.
Is an embedded example. Therefore, when a lateral force is exerted between the roller 10 and the rubber crawler, the side surface of the protrusion comes into contact with the annular body 15, and here the annular body 15
Since the bearings are rotatable, their contact forces are relaxed, mutual wear is reduced, and riding on the protrusions is less likely to occur, and the occurrence of wheel loss is extremely reduced.

[0021]

According to the present invention, by adopting the above-mentioned constitution, the wear of the rolling wheels and the projections can be greatly reduced, and it becomes difficult for the rolling wheels to ride on the projections, so that the wheel removal preventing effect is enhanced. . Therefore, the resin product will not be worn away, and it will be possible to achieve both weight reduction and durability, and to reduce running resistance.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a first example of the present invention.

FIG. 2 is a partial cross-sectional view showing a second example of the present invention.

FIG. 3 is a partial sectional view showing a third example of the present invention.

FIG. 4 is a partial cross-sectional view showing a fourth example of the present invention.

FIG. 5 is a partial cross-sectional view showing a fifth example of the present invention.

FIG. 6 is a partial cross-sectional view showing a modified example of the fifth example of the present invention.

FIG. 7 is a partial sectional view showing a further modified example of the fifth example of the present invention.

FIG. 8 is a partial sectional view showing a sixth example of the present invention.

FIG. 9 is a partial cross-sectional view showing a modified example of the sixth example of the present invention.

FIG. 10 is a partial sectional view showing a seventh example of the present invention.

[FIG. 11] FIG. 11 is a view showing a relationship between a core bar of a conventional rubber crawler and a rolling wheel.

[FIG. 12] FIG. 12 is a view showing another relationship between a core bar of a conventional rubber crawler and a rolling wheel.

[Explanation of symbols]

 1 ... Core bar, 2 ... Rubber elastic body, 3 ... Core bar wings, 4 ... Core bar protrusion, 10 ... Rolling wheel, 11 ... Rolling member, 12 ... Bearing, 13 ... Sphere, 14 sphere holding plate, 15 annular body.

Claims (3)

[Claims] 1. A rolling wheel engaged with a side surface of a protrusion formed on an inner peripheral surface of the crawler for transmission of a driving force or prevention of disengagement from the rolling wheel, the rolling surface being in contact with the protrusion. A roller for a rubber crawler, characterized in that a part or all of the roller is provided with a rolling member that can rotate independently of a rotating shaft of the roller. 2. The rolling wheel for rubber crawlers according to claim 1, wherein the rolling shaft of the rolling member is coaxial with the rolling shaft of the rolling wheel. 3. The roller for a rubber crawler according to claim 1, wherein the rotating shaft of the rolling member is substantially perpendicular to the rotating shaft of the rolling wheel.