JPH0316915Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a link for a working machine attached to a construction machine such as a loader shovel.

[Conventional technology]

Conventionally, a work machine such as a loader shovel has used a work machine link (bell crank) a as shown in Fig. 4, and the structure of the work machine link a is as follows.
As shown in Figure A, plates were welded to have an I-shaped cross section, and as shown in Figure 5 B, plates were welded to have a box-shaped cross section.

[The problem that the idea attempts to solve]

However, in the conventional work equipment link a mentioned above, the plate material is welded at the part where the load is applied when the arm is moved, so high quality welding is required and the structure is complex, resulting in problems such as high price. It was hot.

This invention was made for the purpose of improving the above-mentioned problems.

[Means and actions for solving the problem]

By connecting the intermediate portions of the two approximately F-shaped plates with a boss, and connecting the portions above and below the boss of each plate with a first connecting member and a second connecting member, the load can be reduced. Work equipment link for construction machinery that eliminates welding of parts that would otherwise be attached.

〔Example〕

One embodiment of this invention will be described in detail with reference to the drawings. In the drawing, 1 is a working machine attached to a construction machine such as a loader shovel, and a bucket 4 is pivoted to the tip of a boom 3 that can be raised and lowered by a boom cylinder 2. has been done. At the middle part of the boom 3, a bent part of a work equipment link 5 having a substantially C-shape is rotatably supported by a pin 6, and at the upper end of the work equipment link 5, a bucket cylinder 7 is attached. The bucket 4 is connected to the lower end via a link 8, and the bucket 4 can be rotated by a bucket cylinder 7.

On the other hand, the work machine link 5 has a substantially U-shaped 2
A cylindrical boss 5b passes through the bent portion of each plate 5a, and each plate 5a and boss 5b are fixed by welding, and each plate 5a is connected to each other by the boss 5b. . Further, the plates 5a above the boss 5b are connected to each other by a first connecting member 5c whose both edges are welded to the inner surface of the plate 5a, and the plates 5a are connected to each other by a first connecting member 5c having both edges welded to the inner surface of the plate 5a. A working machine link 5 is constructed by connecting the two parts 5a to each other by a second connecting member 5d welded to the inner surface thereof.

[Effect of idea]

As described in detail above, this invention is based on a boss 5b that is penetrated near the bent portion of the plate 5a that is substantially in the shape of an angular shape.
and the plate bodies 5a are welded to integrate each plate body 5a,
and the portion above the boss 5b of each plate 5a is the first
Since the connecting member 5c and the lower part are connected to each other by the second connecting member 5d, when it is attached to the working machine 1 and used, there is no welded part at the edge of the plate 5a, which is subject to a load. , does not require high-quality welding and improves reliability. In addition, since the structure is simpler than the conventional I-shaped cross section or box-shaped cross section, and there are fewer welded parts, it is easy to manufacture and can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a side view of a working machine that is an embodiment of this invention, Fig. 2 is a perspective view of the working link, Fig. 3 is a front view of the same, and Figs. 4 and 5 A and B are explanations of the conventional FIG. 6A is a sectional view of the working machine link shown in FIG. 5A, and FIG. 6B is a sectional view of the working machine link shown in FIG. 5B. 5a is a plate, 5b is a boss, 5c is a first connecting member, and 5d is a second connecting member.

Claims (1)

[Scope of utility model registration request] Two substantially V-shaped plates 5a are arranged side by side with a gap between them, and a boss 5b is passed through near the bent portion of these plates 5a to be welded to the plate 5a. The upper and lower parts of the boss 5b of 5a are connected to the first connecting member 5c and the second connecting member 5d.
Construction machinery work equipment links that are connected to each other.