JPH0423959Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a structure for mounting a bucket excavator blade in a civil engineering construction machine such as a wheel loader.

[Conventional technology]

In civil engineering construction machines such as wheel loaders, the cutting edge 2 of the bucket 1 shown in Fig. 3 is used.
When installing the digging blade 3 as shown in FIG. 4, conventionally, a mounting structure as shown in FIG. 5 has been adopted. That is, the cutting edge 2 of the bucket is fitted into the forked attachment part 4 at the rear of the excavation blade 3, and one or more shims 5 are inserted to fill the gap between the cutting edge 2 and the forked attachment part 4. The bifurcated mounting portion 4, cutting edge 2, and shim 5 are fastened with bolts 6 and nuts 7, and the bifurcated mounting portion 4 and cutting edge 2 are fastened with bolts 8 and nuts 9. In FIGS. 3 and 4, reference numeral 10 indicates a bolt hole bored through the cutting edge 2 of the bucket 1 and the forked attachment portion 4 of the digging blade 3.

[Problem that the invention attempts to solve]

In the above-mentioned conventional technology, the excavating blade 3 is generally made by casting or forging, and the dimensional error of the forked attachment part 4 is often large. There is a problem that the shim 5 cannot be inserted smoothly between the edge 2 and the shim 5. In particular, as shown in FIG.
If there is a burr 11 on the outer edge of the shim insertion surface, not only will it become more difficult to insert the shim 5, but also a gap δ will be created between the shim 5 and the forked attachment portion 4. As a result, when the bolts 6 and nuts 7 are tightened, the forked mounting portion 4 tends to deform by the gap δ, and if the gap is large, excessive stress is generated in the fork mounting portion 4 during the tightening process. There is a risk of damage and destruction.

An object of the present invention is to provide a bucket excavator blade mounting structure that allows a shim to be smoothly inserted between the bifurcated mounting portion 4 and the cutting edge.

[Means for Solving the Problems] The above object is achieved by forming a tapered surface on the outer edge of the shim insertion surface of the bifurcated attachment portion of the excavating blade to guide the shim when inserting the shim.

[Effect]

Since a tapered surface is formed on the outer edge of the shim insertion surface of the bifurcated attachment part of the excavation blade, the shim can be inserted smoothly.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a sectional view showing the mounting structure of a bucket excavator blade according to the present invention, and FIG. 2 is an enlarged view of section A in FIG. 1. In the figure, the same reference numerals as in FIG. 5 represent the same or equivalent elements. This drilling blade mounting structure is based on the drilling blade 3
At the outer edge of the shim insertion surface of the bifurcated mounting part 4,
It has a structure in which a tapered surface 12 is formed to guide the shim 5 when inserting the shim.

In this embodiment, since the tapered surface 12 is formed on the outer edge of the bifurcated mounting portion 4 on the shim insertion side, the shim 5 can be inserted smoothly. Furthermore, by forming the tapered surface 12, there is no burr 11 as shown in FIG. 6, so when the shim 5 is inserted, there is no gap between the shim 5 and the forked mounting portion 4. . As a result, deformation and destruction of the bifurcated mounting portion 4 can be prevented during the tightening process with the bolts 6 and nuts 7.

In addition, in this embodiment, the tapered surface is bifurcated into the mounting portion 4.
Although the tapered surface is formed at the rear end portion of the forked attachment portion 4, the tapered surface may be formed at the side edge portion of the forked attachment portion 4.

[Effect of idea]

According to the present invention, the outer edge of the shim insertion surface of the bifurcated attachment portion of the excavator blade is formed with a tapered surface that guides the shim during shim insertion, so that the shim can be inserted smoothly.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the excavation blade mounting structure of the bucket of the present invention, Figure 2 is an enlarged view of part A in Figure 1, and Figure 3 is an enlarged view of section A in Figure 1.
4 is a perspective view of the excavating blade, FIG. 5 is a sectional view showing a conventional excavating blade mounting structure, and FIG. 6 is an enlarged view of section B in FIG. 5. 1...bucket, 2...cutting edge,
3...Drilling blade, 4...Bifurcated mounting part, 5...Shim,
6, 8...Boruto, 7,9...Natsuto, 12...
Tapered surface.

Claims (1)

[Scope of utility model registration request] A bifurcated mounting part is provided at the rear of the excavation blade, and the cutting edge of the bucket is inserted into the bifurcated mounting part, and a shim is inserted to fill the gap between the cutting edge and the forked mounting part, and the bifurcated mounting is performed. In the bucket excavation blade mounting structure in which a part, a cutting edge, and a shim are bolted together, a tapered surface is formed on the outer edge of the shim insertion surface of the bifurcated mounting part to guide the shim when inserting the shim. Bucket excavation blade mounting structure.