JPS6233664Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crawler-type traveling device, and more particularly to a multi-crawler type crawler-type traveling device in which each link of the crawler track is provided with a roller.

Conventional crawler-type traveling devices of this type include, for example, Japanese Utility Model Application Publication No. 143343/1983 or Japanese Utility Model Application Publication No. 56/1983.
There is one described in Publication No. 51680.

In the crawler-type traveling device described in the above-mentioned Japanese Utility Model Publication No. 53-143343, as shown in FIG. It is fitted and supported by
A seal e is fitted between this roller c and the side surface of the outer link d fitted to the track pin a, but since the roller c rotates at a fairly high speed, a large burden is placed on the seal e. , and a simple ring-shaped sealing member would break immediately and would be ineffective in actual work. In addition, a first oil reservoir f provided at the axis of the track pin a and communicating with the rotating surface of the roller c, and a second oil reservoir h provided inside the bush g are connected to a communication hole provided in the track pin a. Since it is connected at i,
If either the bushing seal j provided at the end of the roller c or the seal e provided at the end of the roller c is damaged, the roller c becomes unable to rotate, resulting in a fatal malfunction. Further, the roller c in this conventional example has the disadvantage that it easily falls off the track pin a.

On the other hand, in the crawler-type traveling device described in Japanese Utility Model Application Publication No. 56-51680, as shown in FIG. Floating seal n between,
n is interposed, and the sealing performance of roller l is improved, but the above-mentioned floating seal n has a durability problem, and it is necessary to replace this seal when oil leaks from it. . To do this, a track pin is pressed into the link hole with a strong fit.
must be extracted with a jig, but this work is extremely difficult and there are problems with its maintainability.

The present invention has been developed in consideration of the above-mentioned issues.The roller is sealed with a floating seal, and the floating seal and roller can be replaced extremely easily. The purpose of the present invention is to provide a crawler-type traveling device that can be firmly installed without coming off.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1 is a track pin, 2 is a bush rotatably fitted in the center of the track pin 1, and track links 3 are attached to both ends of the bush 2.
One end is press-fitted. Further, the other end of another link is press-fitted into the track pin 1 on the outer side separated from the bush 2. Further, rollers 5, 5 are rotatably fitted to the outside of each of the outer links 3 via bearing bushes 6, with floating seals 4, 4 interposed between the links. A screw 7 is provided at both ends of the track pin 1, and a lock nut 8 is screwed into the screw 7, and the lock nut 8 supports the roller 5 through a thrust ring 9 in the direction in which it comes out. A cover 10 covering the end of the track pin 1 is fixed to the outer surface of the roller 5 with bolts 11.

At the axial center of the track pin 1, large diameter roller oil reservoirs 12, 12 are provided on both sides, and a small diameter bush oil reservoir 13 is provided in the center. After filling the oil reservoir 12 for the bushing with oil, plug 14
It is now being quarantined. The oil reservoirs 12 and 13 for the roller have a larger capacity than the oil reservoir for the bush. Both oil reservoirs 1 above
2 and 13 communicate with the roller 5 and the inner surface of the bush 2 through oil holes 15 and 16, respectively. Also, the roller oil reservoirs 12, 12 are covered by the cover 10.
It is open inside. Incidentally, track links 3 are fixed to track shoes 17. Reference numerals 18, 18 denote rails on which the rollers 5, 5 roll, and these are attached to the vehicle body (not shown).

Since the present invention is as described above, the rollers, 5,
The rotating part 5 can be sealed on one side in the axial direction with a floating seal 4 and on the other side with a cover 10, and the rolling surface maintains an extremely good sealing condition, so that it can be sealed even under the high load of the roller 5. can maintain high-speed rotation for a long time. Also, by removing the cover 10 and lock nut 8, the roller 5
Furthermore, the floating seal 4 can be removed, and the roller 5 and the floating seal 4 can be replaced extremely easily. In addition, the rollers 5, 5 are firmly supported by the lock nut 7, so that the rollers 5, 5 do not separate from the track pin 1 during running.

[Brief explanation of the drawing]

1 and 2 are sectional views showing different conventional examples, and FIG. 3 is a sectional view showing an embodiment of the present invention. 1 is a track pin, 2 is a bush, 3 is a track link, 4 is a floating seal, 5 is a roller, 8 is a lock nut, 10 is a cover, and 18 is a rail.

Claims (1)

[Scope of utility model registration request] A bush 2 is rotatably fitted onto the track pin 1, and track links 3 are attached to both ends of the bush 2.
One end is press-fitted, and the other end of another track link 3 is press-fitted into the track pin 1, and on both sides of the track pin 1, and on the outer surface of the track link 3 that is press-fitted into the track pin 1. Rollers 5, 5 that contact rails 18, 18 provided on the vehicle body side are rotatably fitted in opposing positions, and a floating seal 4 is interposed between the rollers 5 and the track link 3. Lock nuts 8 for supporting the rollers 5, 5 in the axial direction are screwed onto both ends of the track pin 1, and a cover 10 covering the ends of the track pin 1 is removably fixed to the outer surfaces of the rollers 5, 5. A crawler-type traveling device featuring: