JPH0218105Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention is a crushing device that can be attached to the end of the arm of a power shovel in a flexible manner and used for peeling and crushing paved roads, dismantling concrete structures, scrapping, etc. It's about machines.

(2) Conventional technology A crusher uses a hydraulic cylinder to swing a pair of arms to crush the road surface or concrete body held between the arms. There are two types: one in which the arm is fixed and only the other arm is movable.

This invention is related to the latter type, and the prior art is Utility Model Application No. 58-172510 and Utility Model Application No. 58-172510.
There is a crusher published in No. 80410. When peeling off the road surface with these, the tip of the fixed arm is pushed under the paving material on the road surface, and then the movable arm is used to hold it down and raise and lower the entire crusher to peel off the paving material, and the hydraulic cylinder is driven. The movable arm is strongly pressed against the fixed arm to crush paving material or concrete.

(3) Problems that the invention aims to solve In the above work, since the fixed arm is formed integrally with the frame of the crusher main body and the shape of the fixed arm is constant, the opening width and opening angle between the arms are becomes constant, and it is not possible to obtain arm shape, surface pressure, opening width, etc. suitable for the work content, resulting in poor work efficiency.

In addition, the lower part of the frame that is integrated with the fixed arm (near part B in Figures 1 and 2) is susceptible to deformation and cracks due to the strong force during crushing, and repair requires replacing the entire frame. This requires a great deal of cost and effort.

(4) Means for solving the problem In order to solve the above problem, the present invention separates the frame and the fixed arm, and the fixed frame has different length, inclination, tip shape, crushing tooth shape, etc. A single crusher is made with a variety of shapes suitable for different uses, and by selecting one suitable for the work and fixing it to the frame with shaft pins, a single crusher can have multi-purpose functions.

(5) Function The crusher of this invention has a mounting bracket attached to the end of the arm of a power shovel, etc. with a pin, and the crusher can be raised up by the expansion and contraction of the arm cylinder.
Peeling and crushing is performed by rotating an arm by expanding and contracting a hydraulic cylinder provided in the frame. A tool with a long tip and a large opening, as shown in Fig. 2, is suitable for peeling and large-splitting thick paving materials, and a tool with uneven teeth, as shown in Fig. 1, is suitable for crushing or breaking hard materials.

(6) Embodiment Figures 1 to 4 show embodiments of the crusher according to the present invention, and 1 in the figures is the crusher body. Attach the frame 3 to the bracket 2 with bolts or the like, which has pin holes for attaching it to a power shovel or the like. Two holes for fixing the fixed arm 5 are bored in the lower part of the frame 3, and the two holes are made in correspondence with the holes bored in the upper part of the fixed arm, and the two are firmly joined by shafts 7 and 8. A movable arm 6 is pivotally attached to the frame 3 and rotates about the shaft 7 as a fulcrum. The middle position of the movable arm 6 is pivotally connected to the piston rod end of the drive hydraulic cylinder 4 provided in the frame, and the movable arm rotates around the shaft 7 as the hydraulic cylinder expands and contracts, thereby opening and closing the arm. Let's do it.

The shaft 7 is a fixed shaft of the fixed arm 5 and a movable arm 6.
The structure is simplified by also serving as the pivot shaft.
However, these axes may also be separate.

The crushing teeth 9 and the claws 10 can be replaced with ones of different shapes. FIG. 2 shows a case where a fixed arm of another shape is attached and the arm length L, opening width W, and inclination θ are increased.

FIG. 3 is a view of the fixed arm in the direction of arrow A, and shows an example of a fixed arm for large division, and FIG. 4 shows an example of a fixed arm for small division, which also has unevenness.

In a crusher having this configuration, a sharp arm is used for road surface peeling, a concave-convex arm is used for small divisions, and a fixed arm with a wide opening is used for large divisions, which are replaced as necessary. The fixed arm is replaced by attaching and detaching the shafts 7 and 8.

(7) Effects of the invention The crusher of this invention can be easily replaced at the work site with a fixed arm of the type that matches the work content or the type of crushed material by simply removing and attaching two pins, increasing work efficiency. improves.

In addition, the upper part of the fixed arm (near B part) is the part that receives the most load during various operations, and deformation and cracks may occur, but even in that case, only the fixed arm needs to be replaced, so repairs are easy and quick. This has the effect of reducing repair costs.

[Brief explanation of the drawing]

1 and 2 show the crusher of this invention, and FIGS. 3 and 4 are views of the fixed arm in the direction of arrow A. 1... Crusher, 3... Frame, 4... Hydraulic cylinder, 5... Fixed arm, 6... Movable arm,
7, 8... Axis.

Claims (1)

[Scope of utility model registration request] A mounting bracket 2 for mounting on an arm of a power shovel, etc.; a frame 3 having a fixed arm at the lower end;
In a crusher consisting of a hydraulic cylinder 4 provided inside the frame and a movable arm 6 that rotates as the hydraulic cylinder expands and contracts, the frame 3 is divided into two halves, upper and lower, and the fixed arm 5, which is the lower frame, is attached to the upper frame with a pin. A crusher characterized by having a structure in which it is detachably fixed to a crusher.