JPH0211475B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to crawlers in tracked vehicles, and particularly relates to an improvement in a retaining ring that prevents a master pin constituting an endless link from coming off the master link. .

[Prior Art] In general, the tracks of a tracked vehicle include a pair of regular links that are sequentially connected via track pins, and a regular link on one side of the regular links in the connection direction via a track pin. a pair of master links connected at one end, a master pin inserted into the other end of each master link and the regular link on the other side of each regular link;
Each pair consists of a pair of regular links and a shoe fixed to the outside of the master link.

Next, a conventional retaining ring for preventing the master pin from coming off will be explained with reference to FIGS. 5 to 7.

The main body 1 of the retaining ring is formed entirely in an occluded circular shape (C-shape), its cross-sectional shape is rectangular as shown in FIG. 6, and the wall thickness is constant. Main body 1
Holes 2 are provided at both ends into which the needle-shaped body of the mounting scissors is inserted. This retaining ring is fitted into the annular groove 4 provided in the master link 3 using mounting scissors as shown in FIG. , which suppresses the pull-out force of the master pin 5 by the shear strength of its own thick cross section.

[Problems to be Solved by the Invention] The conventional retaining ring described above has a problem in that the hole 2 is
Since the tip of the needle-like body of the mounting scissors inserted into the body and one end surface of the main body 1 touch the stepped portion 6, there is little space during installation, and the stepped portion is a large circle as shown by the chain line in Fig. 7. If the arcuate portion 7 is formed, the main body 1 is not needed. Therefore, the radius of the arc-shaped portion must be made small as shown by the solid line. Furthermore, if the pull-out force of the master pin 5 is greater than the shear strength of the wall thickness of the main body 1 itself, the main body 1 will break.

SUMMARY OF THE INVENTION An object of the present invention is to provide a retaining ring that is easy to install and remove, can reliably prevent a master pin from coming off, and can prevent breakage even when the master pin is subjected to a large withdrawal force.

[Means for Solving the Problems] A crawler track for a tracked vehicle according to the present invention is for achieving the above object, and includes a master link, a master pin fitted into the master link, and a master of the master link. It includes an annular groove formed on the side of the mating surface with the pin, and an arcuate part formed at the end of the outer periphery of the master pin to guide the occluded retaining ring inserted into the annular groove. In a crawler track for a tracked vehicle in which the retaining ring is inserted into an annular groove using attachment/detachment holes provided at both ends of the retaining ring to prevent a master pin inserted into a master link from coming out. , the occluded retaining ring is constituted by a main body having a circular cross-sectional shape, and small flat plate parts formed thinly at both ends of the main body, and one end surface side of the small flat plate part is connected to the main body. The above-mentioned attachment/detachment hole is provided in the small flat plate part, and the small flat plate part is positioned on the outside of the circular arc part with the retaining ring inserted into the annular groove. and the end of the master pin is in contact with the outer circumferential surface of the main body protruding from the annular groove of the retaining ring.

[Operation] In this configuration, a compressive force is generated in the retaining ring due to the pull-out force of the master pin.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention, in which the cross-sectional shape of the occluded circular main body 13 is circular except for its both ends. A small thin plate portion 15 is formed at the end of the main body 13, and one end surface thereof coincides with the outer circumferential line 14 of the main body 13 in the circumferential direction, as shown in FIG. A hole 16 is provided into which the needle-like body of the mounting scissors is inserted.
That is, as shown in FIG. 2, the center line of the small plate portion 15 is eccentric by e with respect to the center line of the portion having a circular cross section. Arrow I in FIG. 2 represents the insertion direction of the retaining ring. That is, the retaining ring is attached with the outer circumferential line 14 side facing outside.

FIG. 3 shows a state in which the main body 13 is in contact with the circular arc portion 7 of the master pin 5, and a gap G is formed between the small flat plate portion 15 and the circular arc portion 7. Therefore,
The tip of the needle-like part of the scissors inserted into the hole 16 no longer hits the arc-shaped part 7. From this state, the main body 13 can be fitted into the annular groove 4 without any problem.

FIG. 4 shows the state in which the main body 13 is fitted into the annular groove 4. Even if the master pin 5 comes out in the direction of the arrow L, the force f only generates a compressive force on the main body 13.

[Effects of the Invention] According to the present invention described above, even if a large arc-shaped portion is formed on the master pin, the retaining ring can be smoothly attached, and the retaining ring can be compressed and deformed against the force of the master pin coming off. Because the retaining ring can be held up, it is possible to prevent the retaining ring from breaking and to securely prevent it from coming off.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
1 is a side view of FIG. 1, and FIG. 3 is a sectional side view showing a state in which the retaining ring shown in FIG. 1 has not been completely installed, and the retaining ring is shown cut along the - line in FIG. 1. FIG. 4 is a cross-sectional side view showing a state in which the retaining ring shown in FIG. 1 has been completely installed. Fig. 5 is a plan view showing a conventional retaining ring, Fig. 6 is a cross-sectional view taken from Fig. 5, and Fig. 7 is a cross-sectional side view showing a state in which the retaining ring shown in Figs. It is a diagram. 13...Main body, 15...Small plate part, 16...
hole.

Claims (1)

[Claims] 1. A master link, a master pin inserted into the master link, and an annular groove formed on the mating surface side of the master link with the master pin,
In order to guide the occluded retaining ring inserted into this annular groove, the master pin is provided with an arcuate portion formed at the end of the outer periphery of the master pin, and a detachable retaining ring provided at both ends of the retaining ring. In a tracked vehicle track in which a retaining ring is inserted into an annular groove using a hole to prevent a master pin inserted into a master link from coming off, the occluded retaining ring is replaced with a circular cross-sectional shape. It consists of a main body formed with The flat plate part is provided with the above-mentioned attachment/detachment hole, and when the retaining ring is inserted into the annular groove, the small flat plate part is positioned outside the arc-shaped part, and protrudes from the annular groove of the retaining ring. A crawler track for a tracked vehicle, characterized in that an end of the master pin is in contact with an outer circumferential surface of a main body.