JPH07323871A - Master link connection structure of caterpillar - Google Patents

Abstract

PURPOSE: To facilitate the assembling/disassembling work of a motor truck and to prevent other parts from being damaged by separating a master link into halves, providing a protruded trapezoidal lock section and a recessed trapezoidal coupling groove on the separation faces of upper and lower half links, and fastening and fixing the upper and lower half links with master bolts after coupling them. CONSTITUTION: A master link 6 is separated into an upper half link 6a having through holes 7 and a bushing insertion hole 8 and a lower half link 6a having screw holes 9 and a pin insertion hole 10. A protruded trapezoidal lock section 12 having slant connecting faces 14, 14' on both outer sides is provided on the separation face 11 of the upper half link 6a, and a recessed trapezoidal coupling groove 13 having slant coupling faces 14, 14' on both inner sides is provided on the separation face 11 of the lower half link 6a. A truck shoe 5 is mounted on the master link 6, and master bolts B, B' are inserted and fastened into the screw holes 9 of the lower half link 6a from the through holes 7 of the upper half link 6a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless track truck, which is a lower part for tanks and heavy vehicles, and particularly to a master link coupling which is a mechanism for coupling the beginning and the end of the truck when mounted on the vehicle. It is about structure.

[0002]

2. Description of the Related Art Generally, a track of a crawler track for a tank or a heavy vehicle is constructed by successively assembling a pin, a bushing, a link and a track shoe in this order. In order to be mounted and used, one part must be manufactured in a separated form.

Therefore, when a track for an endless track is mounted on a vehicle, the track is spread and laid, the vehicle is driven and placed on the truck, and the truck is separated after being wound between the vehicles. It can be attached by connecting both ends.

In such a conventional track connection structure, after a pin and bushing and a link and a track shoe are sequentially and continuously assembled, and a track of an endless track in which a certain part is separated is wound around a vehicle, Both the links at the beginning and the end are connected together with the master bushing, and the master pin is connected from one side of the link processing surface to the inside of the master bushing by hitting and pushing with a hydraulic jack or hammer.

[0005]

Therefore, in the conventional structure as described above, not only is it extremely difficult to connect the trucks, but also the parts are damaged by the impact, and the life and durability of the trucks are reduced. It was In addition, the failure rate is high, the reliability of the product is reduced, foreign substances intrude into the indented part, the corrosion resistance is reduced, and rusting causes an unexpected problem due to damage during disassembly. There was also.

Further, since a hydraulic pulley is required at the time of disassembling and assembling the truck, it is impossible to disassemble and assemble at the work site, and there are many problems such as a long repair time. It had a problem that it could not be applied to lubrication trucks.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a master link at both ends of a track connecting portion of a track for a tank and a heavy vehicle into a half-split state of an existing link. So that the upper and lower half links are separated into upper and lower half-links with convex trapezoidal locking portions and concave trapezoidal engaging grooves, and the tracks on the heavy vehicle are wound into a convex shape on both ends of the master link. After engaging the trapezoidal locking portion and the concave trapezoidal engaging groove, they are fastened and fixed with two master bolts.
A connection structure is provided. This structure of the invention is
It can also be applied to various trucks.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings.

First, the track (1) of the endless track according to the present invention is usually used as a lower part of a heavy vehicle, as shown in FIGS. 1 and 2, and includes a link (2), a pin (3), The bushing (4) and the track shoe (5) are sequentially assembled and configured. When mounting the track (1) on a heavy vehicle, the track (1) is separated.
With respect to the master link (6) for connecting both ends of the stepped separation surface (11) as a reference, a half link (6a) having a through hole (7) and a bushing insertion hole (8), a screw hole (9) and a pin. The lower half link (6a) having the insertion hole (10) is separately configured. Upper half link (6
At the center of the step separation surface (11) of a), a convex trapezoidal locking portion (1) having diagonal coupling surfaces (14) and (14 ') on both outer sides.
2) is formed, and the stepped separating surface (11) of the lower half link (6a) to be connected thereto has a concave trapezoidal engaging groove (13) having diagonal connecting surfaces (14) (14 ') on both inner sides. )
Are formed. Reference numerals (B) and (B ') are master bolts.

The operation and effect of the present invention constructed as above will be described below. First, the link (2), the pin (3),
The bushing (4) and the track shoe (5) are sequentially assembled to make the track (1) linearly extended. Next, the vehicle is driven and mounted on the truck (1), and the truck (1) is wound so as to be stretched between the vehicles. In this state, the pin (3) and the bushing (4) are fitted inside the master link (6) for connecting the track (1), and the upper half link (6a) and the lower half link (6b) are aligned from above and below. And a convex trapezoidal locking portion (12) formed on the separation surface (11) of the upper half link (6a) is formed on the separation surface (11) of the lower half link (6b). Engage the dowel groove (13).

At this time, the convex trapezoidal locking portion (12) and the concave trapezoidal engaging groove (13) have diagonal connecting surfaces (14) and (14 ') on both sides.
Slide on each other to form a guiding function, and the through hole (7) formed in the upper half link (6a) and the screw hole (9) formed in the lower half link are aligned with each other.

In this state, after mounting the track shoe (5) on the upper part of the master link (6), the master bolts (B) and (B ') are inserted into the through hole (7) of the upper half link (6a). As shown in FIGS. 3 and 4, the upper half-link (6a) of the upper half and the lower half-link (6a) of the master link (6) are penetrated and screwed into the screw hole (9) of the lower half link (6b) to be fastened. (6b) is coupled with the trapezoidal locking portion (12) and the trapezoidal engaging groove (13) engaged with each other, and the truck (1) is mounted on the heavy vehicle (A) as shown in FIG. To be done.

When the track (1) mounted on the heavy vehicle (A) is to be removed, the master bolts (B) and (B ') are first removed in the reverse order of the above operation. After removing the track shoe (5) and loosening the tension of the track (1), when the upper and lower half links (6a) (6b) of the master link (6) are separated, the convex trapezoidal locking portion (12) has a concave trapezoidal shape. The track (1) can be easily removed by being separated from the engaging groove (13).

[0014]

As described above, according to the present invention, the trapezoidal shape of the upper half link and the lower half link of the master link is not required to mount the truck on the heavy vehicle by using a separate hydraulic jack or hammer as in the prior art. After connecting with the track shoe using the locking part and the trapezoidal engaging groove, it becomes possible to attach the track to the heavy vehicle by fastening with the master bolt, so the track assembly and disassembly work is extremely easy, It's easy. Further, since other parts are not damaged, the life and durability of the truck are improved and the failure rate is reduced, thereby improving the quality and reliability of the product. Further, since a hydraulic pulley is not required at the time of disassembling and assembling the truck, the disassembling and assembling work can be performed at the work site, the workability is improved, and the time required for breakdown repair is shortened. Further, it can be applied to a lubrication truck.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a side view of the above-described embodiment in a disassembled state.

FIG. 3 is a side view of the combined state of the above embodiment.

FIG. 4 is a partially cutaway plan view of the connected state of the above embodiment.

FIG. 5 is a side view showing a usage state of the embodiment.

[Explanation of symbols]

 1 ... Track 2 ... Link 3 ... Pin 4 ... Bushing 5 ... Track Shure 6 ... Master Link 6a ... Upper Half Link 6b ... Lower Half Link 7 ... Through Hole 9 ... Screw Hole 11 ... Separation Surface 12 ... Convex Trapezoid Stop portion 13 ... Recessed trapezoidal engagement groove 14, 14 '... Oblique coupling surface B, B' ... Master bolt

Claims (2)

[Claims] 1. In an endless track master link connection structure in which a link (2), a pin (3), a bushing (4) and a track shoe (5) are sequentially assembled, the master link (6) is separated from the separation surface. The upper half link (6a) having a through hole (7) and a bushing insertion hole (8) and the lower half link having a screw hole (9) and a pin insertion hole (10), which are separated based on (11), are provided. 6b) and the separation surface (1) of the upper half link (6a).
A convex trapezoidal locking portion (12) is formed in 1), and a concave trapezoidal engaging groove (13) is formed in the separation surface (11) of the lower half link (6b). (6a)
The endless track master link connecting structure characterized in that the endless track track (1) can be connected by engaging (6b) and fastening and fixing with master bolts (B) and (B '). 2. An outer surface of a convex trapezoidal locking portion (12) formed on the separation surface (11) and a concave trapezoidal engaging groove (1).
3. The master link for connecting endless tracks according to claim 1, characterized in that an inclined connecting surface (14) (14 ') is formed on the inner surface of (3).