JPS593013Y2 - Tracked vehicle sprocket device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sprocket device for a tracked vehicle having a buffer function.

Conventionally, the sprocket of a tracked vehicle that runs on crawlers has been composed of a rigid body with a one-piece structure.

For this reason, when driving on rough terrain or suddenly stopping, impact force and shock torque are applied to the vehicle body through the sprocket, resulting in problems such as poor vehicle ride comfort and reduced durability of various parts around the suspension. .

This invention was made for the purpose of improving this problem.The sprocket is composed of a sprocket body and a wheel located at the center of the body, and an elastic body is interposed between them. The purpose of this invention is to provide a sprocket device for a tracked vehicle that absorbs impact force and impact torque, thereby improving the ride comfort of the vehicle and the durability of various parts around the suspension.

This invention will be described in detail below with reference to an illustrated embodiment.

Figure 1 shows a tracked vehicle such as a bulldozer.
An endless crawler track 4 is wound around an idler 2 and a sprocket 3 provided at the front and rear parts of the vehicle body 1 to form a footrest 5, and a lift cylinder 6 is provided at the front of the vehicle body 1 for vertical movement. A flexible blade 7 is attached.

As shown in FIGS. 2 and 3, the sprocket 3 is located with a gap between a sprocket body 8 having teeth 8a around the sprocket body 8, and a gap between the sprocket body 8 and the sprocket body 8. It consists of a wheel 10 attached to an axle 9.

On the outer peripheral surface of the wheel 10, a plurality of pieces are arranged at equal intervals in the circumferential direction.
For example, three concave spherical recesses 10a are formed, and notches 8C are formed at three locations in the rib 8b of the sprocket body 8 located around the recesses 10a. .

In addition, spheres 11 formed of steel balls or the like are housed in these recesses 10a, and on the upper surface of the spheres 11 protruding from the recesses 10a, the proximal end is connected to the rib 8b by means of a pin 12. The distal end side recess 13 of the attached lever 13
a is fitted.

For example, three of the levers 13 are provided in each recess 10a and are arranged in the tangential direction of the wheel 10, and the proximal end of the lever 13 is bifurcated and fits into both ends of the pin 12 on both sides of the rib 8b. In addition, an elastic body 14 such as rubber is interposed between the top surface of the tip side of each lever 13 and the bottom surface of the notch 8C of the sprocket body 8, and the lever 13 is crimped to the sphere 11 by this elastic body 14. There is.

Note that the sphere 11 may be formed in a negative shape at the tip of the lever 13.

Since this invention has been described in detail above, the driving force transmitted to the axle 9 is transmitted to the wheel 10, the sphere 11 and the lever 13.
is transmitted to the sprocket body 8 via the sprocket body 8, which rotates the crawler track 4 and the vehicle runs.
When an impact force is applied to the sprocket body 8 from the road surface when traveling on rough terrain, the elastic body 14 receives this as a compressive load and absorbs it by relaxing it, so that no impact force is applied to any part of the vehicle body 1 or the suspension 5.

Furthermore, when a sudden torque is applied such as during sudden braking, the sphere 11 moves within the recess 10a and pushes up the tip of the lever 13, but each elastic body 14 stops receiving this as a compressive load and absorbs it by relaxing it. , it is possible to eliminate problems such as poor vehicle ride comfort and early decline in the durability of various parts of the suspension due to impacts from the road surface or the shocking torque generated during sudden braking. can.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a side view of a tracked vehicle, Fig. 2 is a front view of a sprocket device, and Fig. 3 is a sectional view taken along line III-III in Fig. 2. . 8 is the sprocket body, 8a is the tooth, 9 is the axle, 10 is the wheel, 10a is the recess, 11 is the sphere, 13 is the lever, 1
4 is an elastic body.

Claims (1)

[Scope of utility model registration request] A wheel 10 whose center portion is attached to an axle 9 and which has a plurality of recesses 10a on its outer circumference, and teeth 8a which are located around the wheel 10 with a gap therebetween and which engage with a crawler track on the outer circumferential surface. A sprocket main body 8 having a base end pivotally attached to a part of the sprocket main body 8, and a distal end side located in a tangential direction of the wheel 10, and a sphere 11 provided at the distal end is connected to a recess 10 of the wheel 10. A sprocket device for a tracked vehicle, comprising: a plurality of levers 13 fitted into the sprocket body 8; and an elastic body 14 interposed between the tip side of the lever 13 and the sprocket body 8.