JP2607259Y2 - Crawler traveling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device used in a combine or a transport vehicle.

[0002]

2. Description of the Related Art A crawler traveling apparatus is suitable for traveling on uneven terrain or a wetland having a lot of irregularities. In order to prevent this, a crawler detachment prevention structure using an elastic body is disclosed in Japanese Utility Model Laid-Open No. 50-74032.
Although these technologies are disclosed in gazettes , these technologies have constant elasticity.
However, there was a drawback that elongation was caused by addition to the crawler .

[0003]

Therefore, in the present invention, the crawler is loosened due to passage on a road surface having a large amount of unevenness, and the crawler is disengaged from the driving wheel, or the crawler is crawled from a rolling wheel which receives the inside of the crawler by passing over a sloping sideways. and to prevent the to or out of the crawler from the drive wheel displaced
Both the elastic force of the elastic body is an object of the present invention to ensure that there is no et al. Kuwawa to the crawler.

[0004]

[Means for Solving the Problems] The track frame 4 is fixed.
The idler wheel 2 is slidable along the guide tube 19 of the
The connecting rod 22 is inserted into the cylindrical portion of the support arm 20 provided.
The head 28 is brought into contact with and inserted into the
Locker screwed into the middle of the connecting head 22 and the connecting rod 22
The position of the rod is restricted by the
An elastic body 27 is interposed between the washer 26 and a guide cylinder.
19 is screwed to the bracket 17 and the tip is
An adjusting sleeve 21 to be brought into contact is provided.
Extend the connecting rod 22 to the rear of the adjusting sleeve 21 and
The rear end of the rod 22 and the connecting members 32 and 33 of the
How the upper rolling wheel 5 fits the crawler 3 according to the inner movement of the driving wheel 2
The crawler traveling device is configured so as to be movably connected in the direction .

[0005]

[Action and Effect of invention] With the configuration as described above, the drive wheel 1 and the take-over crawler 3 between the Yu dynamic wheel 2, for example, Yu dynamic wheel 2 by passing through the convex portion of the ground inside It is rolling wheel 5 on receiving the inner circumferential surface of the moving track frame 4 above the crawler 3 parts even in the state as loosening large crawlers 3 and moves upward with the inner movement of Yu dynamic wheel 2 crawler Since the slack of the crawler 3 does not occur, it is possible to prevent the crawler 3 from being disengaged from the drive wheel 1 and becoming unable to travel.
The elastic member 27 is to relieve the inner movement of Yu dynamic wheel 2 by the elastic force, the elastic force of the tension direction of the idler wheel 2 rod 22
Since it is regulated at between the head 28 and the lock nut 30, relative to the crawler 3, the elastic force of the elastic body 27 added
And the crawler 3 does not elongate. Ma
In addition, the extension of the crawler due to long-time use
9 is rotated to adjust the spacer 2
4 floating By pressing move the seat gold 26 via the
It can be adjusted by extending the wheel 2.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. The track frame 4 is a support member having a U-shaped cross section and being long in the front and rear directions, and is fixed to the vehicle body frame with its lower side opened. The one side end portion before and after the track frame 4 provided Yu dynamic wheel 2, are wound crawlers 3 between the drive shaft 1 positioned around the other end. Also, one upper rolling wheel 5 is provided on the upper side of the track frame 4, and a number of lower rolling wheels 9 are provided on the lower side, so that the inner circumferential surface of the crawler 3 is received and guided. I have to. Projections 8 are provided on the inner peripheral surface of the crawler 3 side by side at regular intervals in the longitudinal direction, and outer and inner wheels that slide on the left and right outer sides of the left and right parallel projections 8, 8 and the inner peripheral surface of the crawler. Are integrally formed to form the upper rolling wheel 5 and the lower rolling wheel 9, and one of the lower rolling wheels 9 has an inner wheel 9 a and an outer wheel 9 b which are separated from each other and each of the arms 11 a and 11 b. It is pivotally attached to the lower end. Arm 11
The arms 11a and 11b are rotatably supported by support shafts 10 horizontally mounted on a box-shaped bracket 15 fixed on the upper side of the track frame 4. Support shafts 16 and springs 12a and The inner and outer wheels 9a and 9b are resiliently directed downward by attaching an elastic body 12b.

[0007] The idler wheel 2 and the upper wheel 5 are interlocked by an interlocking portion 6, the structure of which is as shown in FIG. Bracket 17 on the upper side of track frame 4,
A cylindrical guide tube 19 is mounted between the brackets 17 and 18 in a state where the guide tube 19 is opened outward. A support arm 20 that pivotally supports the idler wheel 2 is fitted into the guide cylinder 19. The portion of the support arm 20 that fits into the guide tube 19 is formed in a tubular shape.

The connecting rod 22 is mounted so as to penetrate the adjusting sleeve 21 screwed to the bracket 17 and the cylindrical portion of the support arm 20. The adjustment sleeve 21 is moved toward the idler wheel 2 by adjusting the degree of screwing the bracket 17 outward, which was to allow normal growth adjusting crawler 3, 23 is a lock nut, By changing the fixing position, the connecting rod 22,
Adjust the overhang position . A spacer 24, spring washers 25 and 26, and a spring 27, which is an example of an elastic body, are fitted into the cylindrical portion of the support arm 20, and the support arm 20, the spring inside the movement of Yu dynamic wheel 2 2
7 and the head 28 is crawler when the head 28 is flat.
3 is configured not to apply the resilient force of the spring 27 . That is, the spring 27 is located inside the head 28 of the connecting rod 22.
And the intermediate washer of the connecting rod 22
Between the lock nut 30 and the washer 26 inside the lock nut 30.
And the elastic force is positioned and attached to the connecting rod 22.
It is completely regulated between both washers 25 and 26 and
Only when 2 touches a large stone etc. and is pressed inward,
The connecting rod 22 is integrally formed with the support arm 20 with the washer 26.
The spring 27 can be moved backward while compressing the spring 27 in the loose fitting portion.
It has been done. The connecting rod 22 is provided with a washer 26,
Spacer 24, adjustment sleeve 21, lock nut 23
Are inserted through the center of the
Irrespective of the overhang adjustment portion of the idler wheel 2
You. Further, the spring 27 which is interposed between two spring seat gold 25 and 26 are to be able to adjust the elastic force by a lock nut 30 screwed on the threaded portion 29 of the connecting rod 22.

An arm 32 pivotally supporting the upper roller 5 is pivotally attached to a bracket 31 fixed on the track frame 4. An interlocking arm 33 is pivotally mounted coaxially with the arm 32, and the torsion spring 7 is interposed between the arm 32 and the interlocking arm 33. 36 is both arms 32,3
Reference numeral 3 denotes a stop pin that is held so as not to open. The distal end of the connecting rod 22 is fitted into the elongated hole 35 of the interlocking arm 33.

[0010] Since an above configuration, the movement of the crawler 3 inner Yu dynamic wheel 2, the connecting rod 22, interlocking arm 3
3. It is transmitted to the arm 32 of the upper roller 5 via the torsion spring 7. When the crawler 3 passes over a convex portion of the road surface or travels on an inclined surface, the inner wheel 9a and the outer wheel 9b move up and down according to the inclination of the crawler 3, so that the inner and outer wheels 9a and 9b The projection 8 is securely sandwiched and guided to prevent the crawler 3 from coming off the drive wheel 1.

[Brief description of the drawings]

FIG. 1 is a side view.

FIG. 2 is an enlarged side view partially broken away.

FIG. 3 is a partially enlarged side sectional view.

FIG. 4 is a partially enlarged front view.

[Explanation of symbols]

2 idler wheel 3 crawler 4 track frame 5 roller wheel 17 bracket 19 guide cylinder 20 support arm 21 adjusting sleeve 22 connecting rod 26 spring washer 27 elastic body 28 head 30 lock nut 32 connecting member 33 connecting member

Claims (1)

(57) [Scope of request for utility model registration] 1. A guide fixed to a track frame (4).
It can slide along the cylinder (19) and has an idler wheel (2) at the tip.
The connecting rod (2) is provided in the cylindrical portion of the support arm (20).
2) with its tip head (28) in contact
The connecting rod head (28) and the connecting rod (22)
Position is regulated by the lock nut (30) screwed into the space
And a washer (26) loosely fitted to the rod (22).
The elastic body (27) is interposed, and the guide cylinder (19)
Screw the racket (17) and insert the tip into the washer (26)
An adjusting sleeve (21) to be brought into contact is provided.
Extend the connecting rod (22) to the rear of the adjusting sleeve (21).
And connecting the rear end of the connecting rod (22) to the upper rolling wheel (5).
The members (32) and (33) are used to move inside the idler wheel (2).
The upper roller (5) can move in the direction of tension of the crawler (3) according to the
Crawler traveling device connected to Noh .