JPH0623512Y2 - Track link device for tracked vehicle - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a crawler track for a construction vehicle, and particularly when linking links forming a crawler track for a large-sized vehicle such as a bulldozer or a power shovel. The present invention relates to a connecting device for facilitating operation.

(Prior Art) FIG. 5 shows a side view of a construction vehicle, and a is a crawler track. FIG. 6 is a perspective view of a part of the crawler belt, in which c is a shoe and b is a link which is fixed symmetrically to one shoe c.

In addition, the link b faces outward like _one end b ₁ and the other end faces inward like b ₂ , and two links are provided between _two outward facing links b ₂ as shown. The links b ₁ facing inward are arranged in a sandwiched manner.

FIG. 7 is a view showing a connecting portion of the link (cross section taken along the line AA in FIG. 6). Portions b2 of the _two links facing inward are press-fitted into both ends of the bush d, respectively.

Further, the portion b ₁ of the two links facing the outside is a bush d.
Is press-fitted into both end portions of the connecting pin p pivotally attached to the inside of the.

The thick line portion of e indicates the press-fitted portion.

(Problems to be Solved by the Invention) As described above, since the connecting pin p and the link b ₁ portion are fixed by press fitting, a very large force is required for assembly and disassembly.

In particular, when the vehicle body weighs 90 tons or more, the pressing force of the connecting pin exceeds 150 tons, and a large press is required to press the connecting pin.

(Means and Actions for Solving Problems) The present invention has been made in view of the above problems, and a retaining ring is provided at both ends of a connecting pin that interconnects links of crawler tracks of a construction track vehicle. A groove to be inserted is provided, and links facing outward are attached to both ends of the connecting pin.
A link facing inward is press-fitted into both ends of the bush to pivotally connect the connecting pin to the inside of the bush, and a groove hole is provided inside the link so as to be concentric with the hole of the connecting pin. After inserting a retaining ring divided into multiple parts that straddles the groove and inserting it, a retaining plug or cap of the elastic body is press-fitted, and the method of holding the connecting pin to the outer link part is press-fitting. In addition to preventing the connection pin from coming off, the pressing machine, which is a large-scale facility, is not required, and the disassembling and assembling work is extremely simple.

(Example) Next, the Example of this invention is described based on drawing.

FIG. 1 is a cross-sectional view of a seam of a link, and 10 is a connecting pin, and a groove 11 into which a retaining ring 31 is inserted at both ends thereof.
Has been cut.

Reference numeral 24 is a bush, and the links 22 facing inward are press-fitted at both ends as shown.

The connecting pin 10 is pivotally attached to the inside of the bush 24, the links 21 facing outward are pivotally attached to both ends of the connecting pin 10, and the inside of the link 21 has a slot 23 concentric with the hole of the connecting pin 10. The holding ring 31 is fitted so as to straddle the groove 11 of the pin 10.

FIG. 2 is a view taken in the direction of arrow B in FIG. 1, in which three retaining rings 31 are provided on each side, and the slot 23 of the link 21 facing outward is formed.
One by one is fitted from the radial grooves 24 'cut to the same depth as.

That is, the width L ₂ of the groove 24 ′ is the arc length L of the retaining ring 31.
Made slightly wider than ₁ .

Reference numeral 32 denotes a retaining plug for the retaining ring 31, which is made of an elastic material and into which three retaining rings 31 are press-fitted after being inserted as shown in the figure.

FIG. 3 is a three-dimensional display of the relationship between FIG. 1 and FIG.

FIG. 4 shows an alternative embodiment in which the retaining ring 31 'is two per side.
It is made up of a single piece and is designed so as to serve as a retainer around the entire circumference of the groove. In this case, there is no groove 24 'in FIGS. The hole 23 'of 21 is made larger than the hole 23 of FIG. 1, the retaining ring 31' is fitted through the gap between the outer periphery of the pin 10 and the hole 23 ', and the cap 33 is fitted in the hole 23' to prevent the ring 31 'from coming off. It is press-fitted inside the ‘

Although the retaining ring 31 or 31 'is described as having a quadrangular cross section in the above-mentioned embodiment, this cross section may be circular, and the groove 11, the hole 23 or 23', and the cap 33 are formed into a shape corresponding to the circular cross section. That purpose can be achieved.

(Effect of the Invention) Since the present invention is as described above, in the conventional technology, a large press was required to press-fit the connecting pin in the crawler track of a large construction vehicle, but the press is no longer required. This eliminates the need to install large-scale equipment, and in addition to this, by providing a retaining ring that is divided into multiple parts and retaining devices such as retaining plugs or caps, it is possible to assemble and disassemble securely. The work efficiency is greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing an embodiment of the present invention,
2 is a view taken in the direction of arrow B in FIG. 1, and FIG. 3 is a view shown in FIGS.
FIG. 4 is a three-dimensional view showing the main points of the drawing, FIG. 4 is a partial sectional view of another embodiment of the present invention, FIG. 5 is a side view of a construction vehicle for explaining the prior art, and FIG. FIG. 7 is a perspective view showing a part of a crawler belt for explaining the technique, and FIG. 7 is a sectional view showing a connecting portion of a link in the conventional technique. 10 ... Connection pin 11 ... Groove 21 ... Link facing outward 22 ... Link facing inward 24 ... Bushing 31 ... Retaining ring 31 '... Retaining ring 32 ... Retaining plug 33. Stop cap

Claims (1)

[Scope of utility model registration request] 1. A groove 11 into which a retaining ring 31 is inserted is provided at both ends of a connecting pin 10 for connecting links of crawler tracks of a construction track vehicle to each other, and both ends of the connecting pin 10 face outward. The link 21 that was attached to the bush 2 and the links 22 facing inward are press-fitted into both ends of the bush 24.
4, the connecting pin 10 is pivotally attached to the inside of
After the slot 23 is formed inside of the concentric with the hole of the connecting pin 10 and the retaining rings 31, 31 'divided into a plurality of parts are inserted and fitted across the groove 11 of the connecting pin 10. A track crawler belt connecting device for a tracked vehicle, comprising: an elastic body retaining plug 32 or a cap 33;