JPS5927491Y2 - Crushing machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a crusher that can prevent the rotating arm from swinging.

A crusher mounted on a work cart such as a power shovel is
Convenient for use in demolishing concrete structures.

In this type of crusher, a type in which a double-acting cylinder is installed between the rear ends of a pair of rotating arms is often used.

In this case, the two rotating arms themselves are only supported by pivots on the support plate.

Therefore, even if the tip of one rotary arm comes into contact with the object to be crushed during crushing, the other rotary arm remains in contact with the support plate until the tip of the other rotary arm comes into contact with the object. is a double-acting cylinder that can freely rotate.

Therefore, even if the ends of both rotary arms do not contact the object to be crushed at the same time, excessive rotational torque is not generated on the support plate, so there is no possibility that the arm or boom of the power shovel connected to the support plate will be damaged during crushing work. It has the advantage of having less

However, if both rotating arms are supported only by their respective pivots, when the crusher is guided toward the object to be crushed or laid down on its side for that purpose, the weight of both rotating arms and the weight of the double-acting cylinder will cause the rotation of the crusher. The arm swings.

In particular, when both rotary arms are opened, the opening positions are not constant due to rocking.

Therefore, it is difficult to accurately and quickly guide both rotary arms to the object to be crushed, so a stopper is installed in the support plate to prevent the rotary arms from swinging more than necessary.

This stopper contacts the stopper only when both rotating arms are at the maximum or minimum opening, so if both rotating arms are not at the maximum or minimum opening, oscillation will still occur, and this oscillation will cause the rotating arm to collide with the stopper, causing noise. do.

Such noise can reach considerable volumes during frequent crushing operations, and has come to be seen as a pollution problem.

The purpose of this invention is to provide a crusher that eliminates the noise problem by preventing the swinging of the rotating arm.

In order to achieve this purpose, the crusher according to this invention is
A cylinder for stopping the rotating arm is installed on the support plate at right angles to the plane of the rotating arm.

Next, an embodiment of this idea will be explained based on the drawings. Fig. 1 schematically shows a crusher 2 according to this idea.

As shown in FIG. 2, the crusher 2 has a pair of support plates 4 arranged side by side, and two rotary arms 6.6 are rotatably supported by respective pivots 8 between the surface support plates.

The rotating arm 6.6 is generally symmetrical and has a generally elongated planar shape.

A crushing tooth 10 is removably attached to the tip of the rotating arm 6, and is arranged so that the tips of both crushing teeth are close to each other when the rotating arm 6.6 is closed.

Also, a double-acting cylinder 12 is provided at the rear end of one of the rotary arms 6.
The cylinder case of the rotary arm 6 is pivotally connected, and the piston rod of the double-acting cylinder is pivotally connected to the rear end of the other rotary arm 6, thereby installing the double-acting cylinder 12 between the rear ends of both the rotary arms 6 and 6. do.

The double-acting cylinder 12 is, for example, a large hydraulic cylinder with a diameter of 35 cm, and it is preferable that the hydraulic circuit of a power shovel, which is a working vehicle, be used for driving the double-acting cylinder 12.

The rotary arm stationary cylinder 14 is arranged at the center of the left end of the support plate 4, and the cylinder case of the cylinder is fixed to the support plate 4 at right angles to the plane of the rotary arm 6.

As shown in FIG. 2, the stationary cylinders 14.14 are, for example, short hydraulic cylinders and are installed opposite the support plates 4, 4, respectively.

It is preferable to fix a friction member 16 such as a rubber disc or a disk pad to the tip of the piston rod of the stationary cylinder 14, and both stationary cylinders 14, 14 must be operated synchronously.

Furthermore, as is clear from FIG. 1, the stationary cylinder 14
The rotary arm 6 on the side to which the device is mounted has a portion corresponding to the cylinder protruding inward.

This protrusion 18 allows the rotary arm 6 to be stopped in the cylinder 14 in any pivoting position.

Furthermore, as shown in FIG. 3, the stationary cylinder 14 may be installed on only one side of the support plate 4.

In this case, the support plate 2 is attached to the inner surface of the other support plate 4.
0 is fixed, and the support plate is installed at a position opposite to the stationary cylinder 14.

The support plate 20 prevents the rotating arm from deflecting when the piston rod of the stationary cylinder 14 is extended to stop the rotating arm.

The protective cover 21 covering the stationary cylinder 14 is preferably attached to the outside of the support plate 4.

The protective cover 21 prevents the stationary cylinder 14 from colliding with other objects and being damaged, and also prevents the seat valve from entering the cylinder.

Between the support plates 4, 4, in the vicinity of the pivots 8, 8, a stopper 22, 24 is fixed.

The collar 22.24 is generally elongated and has an upper stop 22 which limits the maximum opening of the rotating arm 6.6 and a lower stop 24 which limits the minimum opening of both rotating arms.

Even if the stoppers 22, 24 are installed, the rotating arm 6.
6 can be stopped at any rotation position with the cylinder 14, so
The rotating arm will not collide with the stopper 22 or 24 and generate noise.

Further, a bracket portion 28 is attached to the upper end of the support plate 4 via a rotating device 26.

Although not shown, the rotating device 26 is composed of, for example, two disks, the upper disk being fixed perpendicularly to the bracket part 28 and the lower disk being fixed to the support plate 4.

Then, by passing the shaft bolt through the center of both discs and wedged the shaft bolt only in the lower disc, the support plate 4 can be pivoted relative to the bracket part 28 by rotating the shaft bolt with a hydraulic motor.

The bracket part 28 has holes 30 for mounting a work trolley,
32, and at least one of the mounting holes is preferably constructed so that its position can be changed depending on the type and size of the work trolley.

The crusher 2 according to this invention is mounted on a power shovel 34 as illustrated in FIG. 4, but crawler cranes, bulldozers, forklift trucks, etc. can also be used as work vehicles.

To crush the concrete structure 36 by the crusher 2, the rotary arm 6.6 of the crusher is opened and the structure 36 is crushed.
must be brought close to.

At this time, first open the rotary arm 6.6, then fix the rotary arm with the stationary cylinder 14, and when both the rotary arms 6.6 approach the structure 36 in this fixed state, the rotary arms 6.6 Guidance can be provided accurately and quickly.

If the circuit is set so that the stationary cylinder 14 contracts at the same time as the double-acting cylinder 12 expands, the stationary cylinder 14 will not interfere with the rotation of the rotary arm 6.6.

In this case, if the pressing force of the stationary cylinder 14 is made manually adjustable, the double-acting cylinder 12 can rotate both rotating arms while the stationary cylinder 14 holds the rotating arm 6 with an appropriate pressing force. is also possible.

With such a circuit configuration, the rotary arm 6.6 can be easily stopped at any rotational position, and the crushing operation can be performed more quickly.

FIG. 5 shows a modification of the crusher, in which both rotating arms 40, 40 are rotatably supported by a single pivot 42 in the crusher 38.

Further, since the distal end of the rotary arm 40 is curved inward to form a crushing tooth 44, the crushing tooth is integral with the rotary arm, and both crushing teeth are wedge-shaped and disposed opposite to each other.

Since this crusher 38 does not have a stopper for regulating the rotary arm, there is no fear that the rotary arm will come into contact with the stopper and generate noise, and the lateral displacement of both rotary arms can be restricted by the stationary cylinder 14. Bye.

The crusher according to this invention solves the noise problem in conventional crushers by using a stationary cylinder.

At the same time, even if the tips of both rotary arms do not contact the object to be crushed at the same time, the support plate is subject to a large amount of rotation I.
Since no torque is generated, the arm or boom of a work cart, such as a power shovel, is less likely to be damaged during crushing work.

Furthermore, even if both rotary arms of this crusher are opened and laid down horizontally, the rotary arms remain stationary due to the stationary cylinder, so both rotary arms can be accurately and quickly guided to the object to be crushed. Wear.

[Brief explanation of the drawing]

Figure 1 is a schematic side view of the crusher according to this invention, Figure 2 is a front view of the crusher of this invention seen from the left side of Figure 1, and Figure 3 is a modification of the stationary cylinder used in this invention. A front view similar to Fig. 2 showing an example with only the protective cover cut away, Fig. 4 a side view showing the crusher of this invention mounted on a power shovel, and Fig. 5 a modification of the crusher. It is a schematic side view which shows an example. 2... Crusher, 4, 4... Support plate, 6, 6... Rotating arm, 8, 8...
・Pivot, 10.10... Crushing tooth, 12...
...Double acting cylinder, 14...Rotating arm stationary cylinder, 21...Protective cover, 34...
...Power shovel.

Claims (1)

[Claims for Utility Model Registration] 18. A support plate having a bracket portion for mounting on a work trolley, two rotating arms rotatably attached between the support plates, and a double-acting device installed between the rear ends of both rotating arms. 1. A crusher comprising a cylinder, characterized in that a rotating arm stationary cylinder is installed on a support plate at right angles to the rotating arm. 2. The crusher according to claim 1, wherein the stationary cylinders are installed opposite to the surface support plates. 3. Utility model registration claim 1, characterized in that a stationary cylinder is installed on one side of the support plate, and a support plate is attached to the inner surface of the other support plate at the same position as the stationary cylinder. The crusher described in . 4. The crusher according to claim 1, which is a registered utility model, characterized in that a protective cover covering the stationary cylinder is attached to the outside of the support plate.