JPS5918950Y2 - Track coupling device - Google Patents

Description

[Detailed description of the invention] As shown in the first diagram, the endless track belt that constitutes the suspension of a tracked vehicle is constructed by connecting two rows of links a with pins d through bushings C fitted into one side of each link. They are connected endlessly and fixed to a shoe e that is like a mating plate, forming a track band.

Note that the bushing C is loosely fitted onto the pin d, and this surface forms a sliding surface for rolling wheel movement.

That is, as shown in the sectional view of FIG. 2, one side A part of the link a is fitted into and fixed to the bushing C loosely fitted to the pin d, and the other B part is press-fitted and fixed to the end of the pin. The links are connected in the same way to form a chain.

However, the last link to be endless (mask link)
In b, the end S of the bushing is caught and cannot be connected, so the end face S of the bushing is deleted and the side surface H of the link is
Incorporate it flush with.

Note that a spacer f is inserted in place of the deleted bushing end for positioning.

In order to reduce the wear between the pin d and the bushing C on the rolling surface of the endless track belt formed as described above, a seal g is provided to prevent muddy water from entering into the pin and bushing, as shown in Fig. 2. I am wearing it.

In order to extend the life of the pins and bushings, it is necessary to adopt an oil lubrication system that supplies oil to the sliding surfaces between the pins and bushings, which are currently in a dry state and are coated with grease at the initial stage. Become.

However, in order to use the above method, it is necessary to fully consider the following points.

(1) A sealing mechanism is required to prevent oil from leaking into the outside air between the pin and bushing and between 977, and to prevent muddy water from entering between the pin and bushing.

(2) When oil is supplied, oil leaks from the mating surface of the spacer used at the joint of the master link, so there is a problem with the above-mentioned track belt structure mechanism.

Therefore, in order to construct an endless master link, a method is required in which the main body of the link is divided and the divided parts are finally fastened together.

Therefore, the present invention relates to a crawler track coupling device installed in a construction machine such as a hydraulic excavator or a bulldozer, which is a mechanism for dividing and fastening the master link in item (2).

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 3 is a perspective view showing the state of link connection around the master link when the mechanism is provided, Fig. 4 is a perspective view showing details of section IV in Fig. 3 and shows the assembly state of the present invention, and Fig. 5 FIG. 2 is a perspective view showing the component shapes of a shoe and a split link.

The outline of the present invention will be explained according to FIGS. 4 and 5.

The two master links 1 and 2 are provided with a cutout S on their mating surfaces, and the cutout S forms an N-shaped edge in cross section when viewed from above.

A support plate 4 whose edge portion has a V-shaped cross section is fixed to the shoe 3 by integral processing with the shoe 3 or by welding, bolting, or the like.

The notches S of the divided links 1 and 2 are fitted into the spaced apart protrusions 4a and 4b of the V-shaped support plate 4, and the support plate 4 and the links 1 and 2 are fixed with bolts 5.

However, counterbore the support plate 4 so that the head of the bolt 5 does not protrude beyond the outer peripheral surface of the support plate 4, and ensure that the outer peripheral surface of the support plate 4 does not protrude beyond the outer peripheral surface of the links 1 and 2. Determine the shape of the notch S.

Note that the height h of the support plate 4 is equal to the height H of the link.

The present crawler linking device configured in this way has a notch S in the mating surfaces of the divided master links 1 and 2, and has an N-shaped cross section.
By fitting into the support plate 4 having a mold shape, the force in the longitudinal direction can be received by the distributing portions of the notches S, respectively.

Further, by making the height of the support plate 4 equal to the height of the links 1 and 2, the support plate shape receives a strong tensile force and has high rigidity and strength.

Since the support plate 4, the link 1.degree. 2, and the bolt 5 are used to fix the link, the force in the vertical direction is smaller than the force in the longitudinal direction, but the mating surfaces of the divided links 1 and 2 will not easily come off.

As described above, according to the present invention, a mask link having pin holes at both ends is divided into two parts from the middle part to form links 1 and 2, and a cross-sectional edge shape is formed on each of the mating surfaces of the links 1 and 2. An N-shaped notch S is provided, a support plate with a V-shaped cross-sectional edge shape is fixed to the shoe, and links 1 and 2, which are divided into two parts, are fitted together and attached to the distant protrusions of the V-shaped support plate. Insert the notch S and connect the support plate and links 1 and 2.
By fixing the mask link with bolts, the mask link can be easily attached and detached by simply tightening and removing the bolts.

When connected, the cross-sectional shape of the N-shaped edge of the mask link and the cross-sectional shape of the ■-shaped edge of the support plate match and fit together, so the force in the row direction can be supported by both the N and V-shaped sloped parts.
Has sufficient strength.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the endless track belt, Fig. 2 is a sectional view of its connecting part, Figs. Figure 3: Perspective view of section IV.
FIG. 5 is a perspective view of the shoe link. 1.2... Master link, 3... Shoe, 4... Support plate, 5... Bolt.

Claims (1)

[Scope of utility model registration request] A master link having pin holes at both ends is divided into two from the middle part to form links 1 and 2, and a notch S with an N-shaped cross-sectional edge shape is provided on each mating surface of the links 1 and 2. , a support plate with a V-shaped cross-sectional edge shape is fixed to the shoe, and links 1 and 2 which are divided into two are put together, and the V-shaped support plate is fixed to the shoe.
A crawler track coupling device characterized in that notches S are fitted into spaced protrusions of a molded support plate, and the support plate and links 1 and 2 are fixed with bolts.