JPS631661Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Industrial Application Field This invention relates to a roller bearing support device for a track-type self-propelled vehicle used as a traveling device for a combine harvester, a transport vehicle, a self-propelled self-removal device, etc.

(b) Prior Art As a prior application, there is a technology in which double-row rollers can be rotated left and right around a rotation axis.

For example, Utility Application No. 56-190877.

(c) Problems that the invention aims to solve When the aircraft moves on flat ground, all four rows of track wheels (double rows on the left and right) touch the ground on their respective tracks. However, when the angles of the contact surface of one track and the contact surface of the other track are different, that is, when walking on a "〓"-shaped ground, the difference between the left and right double-row wheels Only the outer row of wheels made contact with the ground, and there was a gap between the inner and outer wheels and the crawler track.

This impairs the role of the track wheels in correctly guiding the tracks to the idler and drive sprocket, making them easy to come off. Bearing the weight of the aircraft causes uneven wear on the wheels and tracks.

In order to eliminate these drawbacks, one pair of left and right double-row wheels is supported by a rotating shaft, and the pair of left and right wheels can also be tilted along the slope of the ground. The rotating shaft is provided below the wheel shaft, and a protruding portion is formed on the bearing portion of the rotating shaft to prevent the track from coming off.

(d) Means for solving the problem In order to solve the above problems, the present invention is constructed as follows.

In the rolling wheels of a tracked self-propelled vehicle, a bearing portion 15 in side view is fixedly installed on the lower surface of the track frame 10,
A crawler-track detachment prevention protrusion 15a is provided at the lower part of the bearing portion 15, and a roller 9 is provided on the crawler-track detachment prevention protrusion 15a.
A long bearing hole 15b is provided to support a rotation shaft 16 for rotating the L and 9R left and right.

(e) Embodiment The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is a plan view of a carrier vehicle among crawler-type self-propelled vehicles equipped with a wheel bearing support device, and FIG. 2 is a side view of the same.

A steering wheel 6 and seats 7, 7 are provided in the driver's cab 1, and an engine 3 is installed under the seats 7, 7.
is located. Power is transmitted from the engine 3 to the transmission case 4 below the loading platform 2 via a power transmission shaft. The rotation after the gear change is transmitted from the transmission case 4 to the drive sprocket 11, and the crawler track 5
to drive. The crawler belt 5 is tightened by an idler 12 at the front, and a double row of wheels 9 supported by a truck frame 10 below holds the crawler belt.

The truck frame 10 is connected to the chassis 8, and the entire weight of the aircraft is transferred to the truck frame 10.
It is supported by rollers 9. The present invention relates to a support structure for this wheel 9.

FIG. 3 is a front cross-sectional view of a wheel-rolling device in which the bearing hole is not an elongated hole, FIG. 4 is a cross-sectional view on the wheel-rolling shaft 17, FIG. Figure 6 is a side view.

The wheels are supported in pairs 9L and 9R on the left and right, forming a double row as a whole. Double rows of protrusions 5b and 5a of the crawler belt 5 are sandwiched between the left and right rows to guide the crawler belt 5 so that it does not come off.

Conventionally, the wheel shaft 17 that supports the pair of left and right wheels was supported by the truck frame 10 as it is, so the left and right wheels could not tilt left or right.

A bearing case 18 supporting the wheel shaft is supported by a rotation shaft in the front-rear direction, and the rotation shaft is supported by a bearing portion 15 vertically provided from the truck frame 10 in a side view.

Then, the axis of the rotating shaft is lower than the axis of the wheel shaft 17, and the tip of the vertical bearing is inserted between the double rows of protrusions 5b and 5a of the crawler track 5,
The protrusion 15a is configured to prevent the crawler from coming off when the crawler is tilted or bounces and the wheels cannot follow it.

When the inclination of the track is not so severe, as shown in Fig. 5, the track wheels 9 follow the inclination of the track and incline, so the left and right track wheels 9L and 9R are always in close contact with the track. .

FIGS. 7, 8, and 9 are drawings showing an embodiment of the present invention in which the bearing hole 15b of the rotating shaft 16 of the wheel is formed into an elongated hole.

The bearing part 15 of the rotating shaft 16 is configured in a side view, and the bearing hole 15b of this bearing part 15 is a long hole in both the front and rear, so that the rotating shaft 16, and thus the rolling wheels 9L and
9R is designed to be able to rotate left and right and also swing up and down.

With this configuration, when the vehicle body tilts and floats up as shown in Figure 7, the track wheels can follow the amount that the tracks sag to prevent the tracks from separating from the track wheels. The bearing hole 15b of the rotating shaft 16 is made into a long hole.

Also, since the wheels are pivotally supported by the rotational shaft, when the crawler track is tilted as shown in FIG. 9, the wheels are also tilted and follow the same.

When the wheels are in contact with the ground under load, the reaction force from the ground is transmitted to the rotating shaft through the wheels, and the rotating shaft 16 is fixed in contact with the upper end of the long hole of the bearing hole 15b, and this portion receives the load. Therefore, only a slight lateral thrust is applied to the rotation axis. Also, Figure 5,
In the embodiments shown in FIGS. 6, 7, 8, and 9, the rotation shaft 16 is provided below the wheel shaft 17, so even if the wheel rotates left and right, Since there is little movement to
It does not deviate significantly from 0.

(f) Effects of the invention As described above, the present invention has the following effects.

First, the rotation shaft 16 for left and right rotation is connected to the wheel shaft 1.
7 and provided with the crawler slip-off prevention protrusion 15a on the bearing part of the rotating shaft 16, even when the roller 9 rotates left and right, the amount of swing in the left and right direction is small, so that the crawler 5 can be This means that it no longer deviates significantly from the center of the truck frame 10.

Second, the possibility of the crawler coming off from the drive sprocket or idler is reduced, and since the crawler detachment prevention protrusion 15a is provided on the bearing of the rotating shaft, the crawler may be tilted beyond the allowable angle of the bearing, causing the crawler to Even if there is a risk that the double-row protrusions 5b and 5a may come off from the outer peripheries of the wheels 9L and 9R, the crawler slip-off prevention protrusions contact the protrusions 5b and 5a of the crawler belts, thereby preventing the crawler tracks from shifting in the lateral direction. It is.

Thirdly, although the bearing portion 15 of the rotating shaft 16 is configured in a side view, the bearing hole 15 of the bearing portion 15
b is an elongated hole in both the front and rear, so that the rotating shaft 16 and, by extension, the rolling wheels 9L and 9R can be rotated left and right, and can also swing up and down.

With this configuration, when the vehicle body tilts and floats up as shown in Figure 7, the track wheels can follow the amount that the tracks sag to prevent the tracks from separating from the track wheels. It became.

[Brief explanation of drawings]

Figure 1 is a plan view of a carrier vehicle among crawler-type self-propelled vehicles equipped with a wheel bearing support device, Figure 2 is a side view of the same, and Figure 3 is a wheel bearing device in which the bearing hole is not configured as a long hole. 4 is a sectional view on the wheel shaft 17, FIG. 5 is a diagram showing the crawler track 5 tilted due to the condition of the ground, FIG. 6 is a side view, and FIGS. 9 are drawings showing the operation of an embodiment of the present invention in which the bearing hole of the rotating shaft provided in the bearing portion is an elongated hole. 5...Crawler track, 9L/9R...Rolling wheel, 15...Bearing portion, 15a...Crawler removal prevention protrusion, 15b...
Bearing hole, 16...Rotating shaft, 17...Rotating wheel shaft.

Claims (1)

[Scope of utility model registration request] In the wheels of a tracked self-propelled vehicle, a bearing portion 15 in side view is fixedly installed on the lower surface of the track frame 10,
A crawler-track detachment prevention protrusion 15a is provided at the lower part of the bearing portion 15, and a roller 9 is provided on the crawler-track detachment prevention protrusion 15a.
A roller bearing support device for a crawler-type self-propelled vehicle, characterized in that a long bearing hole 15b is provided to support a rotation shaft 16 for rotating left and right L and 9R.