JP3734875B2 - Coreless rubber crawler travel device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a mandrel-less rubber crawler traveling device for remodeling an ordinary vehicle into a four-wheeled track vehicle.
[0002]
[Prior art]
When a vehicle travels on snow, a studless tire is currently used, and a method of attaching a chain to the tire is used. However, satisfaction is not always obtained, especially with iceburn. In off-road driving, the vehicle has a tendency to sink particularly during fresh snow, and a new traveling device has been demanded.
[0003]
However, a rubber crawler traveling device as disclosed in Japanese Patent Application Laid-Open No. 61-202979 has been proposed as a traveling device that improves this drawback. This is a wheel mounted on the rear axle, a pair of auxiliary wheels are provided on the lower frame, and a belt is suspended on them, which is intended to improve the conventional drawbacks. The performance characteristics required for such a rubber crawler include three points of low noise, low vibration and light weight, and these points are not satisfied when a core metal is embedded in the rubber crawler. In addition, in the rubber crawler in which the core metal is embedded, it is also true that high speed running cannot be dealt with. Therefore, it is preferable to use a rubber crawler in which the core metal is not embedded. In the case of this coreless rubber crawler, the cored bar is not embedded, and only a steel cord, which is a tensile body, is embedded in the longitudinal direction of the rubber crawler, and maintains a uniform tension on the rubber crawler. Therefore, a flange having an embedded steel cord width is required.
[0004]
FIG. 5 is a side view showing an outline of the coreless rubber crawler traveling device, and FIG. 6 is a longitudinal sectional view of the main part thereof. That is, the sprocket wheel 32 is fixed to the axle 31, the drive pin 33 is supported on the circumference of the sprocket wheel 32, and the inner end surface of the coreless rubber crawler 34 is supported at the tip of the sprocket wheel 32 to hold the tension. For this purpose, a flange 35 is formed. In the figure, reference numeral 36 denotes a wheel disposed below the axle 31, and the axle 31 and the wheel 36 are disposed in a substantially triangular shape. Although it is true that such a traveling device can travel at a high speed, in some cases, further weight reduction is required, and a reduction in vehicle height may be required. However, if the vehicle height of the above-described coreless rubber crawler traveling device is to be lowered, the axle 31 needs to be lowered, and the flange 35 of the sprocket wheel 32 and the wheel 36 come into contact with each other. The height cannot be lowered.
[0005]
[Problems to be solved by the invention]
The present invention has an object to adjust the vehicle height low in the above-described coreless rubber crawler traveling device, and achieves the object by separating the drive pin and the flange of the sprocket wheel.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following configuration. That is, a wheel to be mounted on the axle, a drive pin arranged at a constant pitch on the circumference of the wheel, a lower frame that is pivotally supported on the axle, a wheel that is pivotally supported on the lower frame, and this drive pin A coreless rubber crawler suspended between the wheels, and a protrusion is continuously provided with a constant pitch in the longitudinal direction of the rubber crawler at the center of the inner peripheral surface of the rubber crawler, and is engaged with the drive pin, A rubber crawler in which a tension support member is pivotally supported on the axle on both the left and right sides of the wheel, and a tension support roller is supported at the tip of the support member and is in contact with the inner peripheral surface of the rubber crawler to support the inner peripheral surface of the rubber crawler. The rubber crawler traveling device is provided at the top of the roller.
[0007]
The tension support roller may be pivotally supported so as to be rotatable.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In a conventional coreless rubber crawler travel device, a driving wheel and a tension support member are integrally provided on the circumference thereof. For this reason, the lateral width of the drive wheel cannot be increased by the amount of the tension support member, and when the vehicle height is lowered, the tension support member (usually a flange) comes into contact with the wheel, It was impossible to reduce the vehicle height.
[0009]
The greatest feature of the coreless rubber crawler travel device of the present invention is that the wheel used for driving and the tension support member that supports the inner peripheral surface of the rubber crawler are separated, and when the vehicle height is lowered. Also, the member that contacts the wheel is eliminated, and the object of the present invention can be achieved. Further, the tension support roller is arranged so as to be on the top of the rubber crawler, so that it is possible to suspend the rubber crawler without burden, and smooth rotation is possible. Further, since the drive pin and the tension support member are rotatably supported, the inner peripheral surface of the suspended rubber crawler is not damaged.
[0010]
Here, the embodiment of the present invention will be further described. A (sprocket) wheel is mounted on the axle, and a tension support member is pivotally supported at a portion of the left and right side portions that contacts the top of the rubber crawler. A wheel is mounted on the lower frame supported by the axle, and a rubber crawler is suspended between the wheel and the wheel. As described above, the coreless rubber crawler traveling device of the present invention separates the wheel and the tension support member, and the tension support member is disposed at a portion corresponding to the top of the rubber crawler and does not hang down toward the wheel. . Therefore, even if the vehicle height is lowered, there is no contact between the tension support member and the wheel, and the vehicle height can be freely adjusted within a considerable range.
[0011]
【Example】
Hereinafter, the coreless rubber crawler traveling device of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a side view of the coreless rubber crawler traveling device of the present invention, and FIG. 2 is a longitudinal sectional view at the center thereof. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG.
[0012]
In the figure, reference numeral 1 denotes an axle extending from the vehicle, which is a shaft for transmitting a driving force to the rubber crawler. A pair of wheels 2 and 2 are mounted on the axle 1, and a plurality of drive pins 3 are axially supported on the circumference of the wheels 2 and 2 at a constant interval. The drive pin 3 is preferably pivotally supported. Further, a lower frame 4 is pivotally supported on the axle 1, and an appropriate number of eight rolling wheels 5 in this example are pivotally supported on the lower frame 4 in pairs. In this example, a side frame 6 is provided along the side of the wheel 5, and the side frame 6 can be reinforced by being connected to the lower frame 4 with a reinforcing material indicated by a dotted line. Further, a tension support member 7 is pivotally supported on the axle 1 as a pair on the outside of the wheels 2 and 2, and the tension support roller 8 is preferably rotated to a portion corresponding to the top of the rubber track on the tension support member 7. It is pivotally supported.
[0013]
Now, the coreless rubber crawler 10 is suspended from the wheel 2 and the wheel 5, and the coreless rubber crawler 10 is not embedded in the core, and the steel cord 11 is embedded in the longitudinal direction. It is what has been. Projections 12 are formed on the inner peripheral surface with a constant pitch in the longitudinal direction. The pitch of the projections 12 and the pitch of the drive pins 3 are the same. The two are engaged, and the rolling wheels 5 are in contact with the left and right inner peripheral surfaces of the projections 12. On the other hand, the tension support roller 8 provided in the tension support member 7 is attached to the inner peripheral surface of the coreless rubber crawler 10 at the top thereof. In the figure, 13 is a bearing.
[0014]
In the coreless rubber crawler travel device of the present invention, the drive pin 3 that engages with the protrusion 12 is provided on the circumference of the wheel 2 as shown in the figure, but the tension support roller 8 is It is separated and connected only to the top of the tension support member 7 so that when the wheel 2 rotates and reaches the lowermost part, there is no tension support roller 8 on the left and right.
[0015]
For this reason, for example, when the axle is lowered and the vehicle height H is lowered, the wheel 2 and the wheel 5 are of course not in contact with each other, but the tension support roller 8 is not suspended on the wheel 5 side. No contact will be lost. Therefore, the vehicle height H of the rubber crawler traveling device can be changed considerably freely.
[0016]
【The invention's effect】
According to the present invention, the (sprocket) wheel and the tension support member are separated as described above, thereby providing a wide range of freedom in adjusting the vehicle height of the rubber crawler traveling device.
[Brief description of the drawings]
FIG. 1 is a side view of a rubber crawler traveling device of the present invention.
FIG. 2 is a longitudinal sectional view at the center thereof.
FIG. 3 is a cross-sectional view taken along the line AA of FIG.
4 is a cross-sectional view taken along line BB in FIG. 2. FIG.
FIG. 5 is a side view showing an outline of a conventional rubber crawler traveling device.
6 is a longitudinal sectional view of the main part of FIG.
[Explanation of symbols]
1. Axle,
2 ... Wheel,
3. Drive pin,
4 ... Lower frame,
5 ... Rolling wheel
6. Side frame,
7. Tension support member,
8. Tension support roller,
10 ... rubber crawler,
11 ... Steel cord,
12. Projection,
H ... Vehicle height.

Claims (1)

  A wheel to be mounted on the axle, a drive pin arranged at a constant pitch on the circumference of the wheel, a lower frame that is pivotally supported on the axle, a wheel that is pivotally supported on the lower frame, and the drive pin and the wheel A rubber crawler without a mandrel suspended in between, and a protrusion is continuously provided with a constant pitch in the longitudinal direction of the rubber crawler at the center of the inner peripheral surface of the rubber crawler, and is engaged with the drive pin. A tension support member is pivotally supported on the axle on the left and right sides, and a rubber crawler in which a tension support roller that is pivotally supported at the tip of the support member and is in contact with the inner peripheral surface of the rubber crawler to support the inner peripheral surface of the rubber crawler is suspended. A rubber crawler travel device provided at the top.

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