JPH0326847Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is a crushing method in which concrete, etc. is sandwiched between a pair of crushing arms, and both crushing arms are driven by a hydraulic cylinder to crush the concrete by forcefully pressing it. This relates to a mounting device for the machine.

[Conventional technology]

The above-mentioned crusher is used by being attached to the end of the arm of a movable civil engineering machine such as a power shovel. Therefore, by the movement of the arm, the crusher can be moved up and down, raised and lowered, and rotated together with the arm. Furthermore, it may be necessary to change the mounting angle of the crusher with respect to the tip of the arm.

Conventionally, in order to achieve the above objectives,
As in the idea described in Japanese Utility Model Publication No. 57-6695, a large-diameter circumferential groove is formed on the top plate of the crusher frame, and a large-diameter circumferential groove is formed on the mounting frame attached to the tip of the arm of a power shovel. A large number of balls are fitted between the grooves and the two are connected with pins, the crusher is rotatable relative to the mounting frame, and the bolts attached to the mounting pieces provided on the mounting frame are connected to the top plate. There is a crusher that can be removably engaged with an engagement groove formed in the crusher and tightened with a nut to prevent the crusher from rotating relative to the mounting frame.

Furthermore, the invention described in Japanese Patent Publication No. 58-14909 rotatably connects the top plate of the crusher frame and a mounting frame attached to the tip of an arm of a power shovel, etc., and also connects the top plate and the mounting frame. A click stop is provided between the frames.

[Problem that the invention attempts to solve]

In the conventional device as mentioned above,
The device described in Publication No. 6695 requires a lot of work to change the direction of the crusher, and because it has a structure in which rotational motion is received by a large number of balls, it is troublesome to assemble, leading to high costs.

Furthermore, although the invention described in Japanese Patent Publication No. 58-14909 has the advantage that the crusher can be easily rotated, the connection between the crusher and the mounting frame is a simple sliding bearing, which hinders rotation. There is a problem in that it is easy to cause

[Means for solving problems]

In order to solve the above problems, this invention uses a spherical bearing to rotate the rotary tube fixed to the top plate of the crusher frame and the shaft fixed to the base plate of the mounting frame attached to the operating arm of the civil engineering machine. The rotary cylinder and shaft are fitted together so that they can move freely but not in the axial direction, and form a rotary joint that connects the hydraulic circuit on the mounting frame side and the hydraulic cylinder provided on the frame.

[Effect]

Since this idea has the above structure, it is
Similar to the invention described in Publication No. 14909, the crusher can be easily rotated relative to the mounting frame by simply placing the crusher against something and moving the arm. The rotating cylinder fixed to the machine frame and the shaft fixed to the mounting frame attached to the operating arm of a power shovel fit together to form a rotary joint, so no matter how many times the crusher rotates, the oil pressure to the crusher remains constant. does not cause any hindrance to the supply and discharge of Furthermore, since a spherical bearing is provided between the cylinder and the shaft, the crusher rotates smoothly.

〔Example〕

The details of this invention will be explained below based on an embodiment shown in the accompanying drawings.

In FIGS. 3 and 4, A is a crusher, which includes a pair of crushing arms 4 and 5 rotatably attached to a frame 1 by shafts 2 and 3, and a hydraulic cylinder 6 that drives the arms 4 and 5 to open and close. consisting of arms 4 and 5
are engaged by the engaging portions 7 and 8, and are interlocked so that both arms 4 and 5 are simultaneously rotated by the same angle in opposite directions.

Reference numeral 9 denotes a top plate fixed on the frame 1, and an opening is provided in the center of the top plate as shown in FIG. , this rotary cylinder 10 has a cylindrical shape, and has a pair of upper and lower oil grooves 11, 1 on the inner circumference extending over the entire circumference.
2 are provided, and O-rings are fitted in the upper and lower circumferential grooves of these oil grooves 11 and 12.

13 is a mounting frame, and a disk-shaped guide plate 15 is fixed to the lower surface of the base plate 14. A block 16 housing a hydraulic booster connected to a hydraulic circuit and the like is fixed on the substrate 14, and a cylindrical shaft 17 is fixed to the lower part of this block, and this shaft is connected to the rotating cylinder 10.
As shown in FIG.
8 and 19 to constitute a rotary joint B.

The upper inner peripheral surface of the rotating cylinder 10 has a large diameter, and a spherical bearing C is fitted therein. As shown in FIG. 1, this bearing C is composed of a cylindrical body 20 that fits on the shaft 17 and a ring 21 that fits on the outside of the cylindrical body 20. It has a concave spherical surface that fits the spherical surface.

Further, the ring 21 is supported by a ring-shaped spacer 22, and this spacer 22 is received on the inner periphery of the guide plate 15.

D is a pair of click stops fixed to the lower part of the top plate 9. As shown in FIG. 2, this click stop fixes the upper end of a cylindrical body 25 in a hole in the top plate 9. A spring receiver 27 is provided inside this cylindrical body 25 to be pushed upward by a spring 26, and the lower end of the spring 26 It is supported by a cap 28 fixed to the lower end of the body 25.

A hole 30 having a smaller diameter than the inner diameter of the cylinder 25 is provided at the upper end of the cylinder 25 exposed on the top plate 9.
An engaging element 31 such as a ball is loosely fitted into the guide plate 1.
A large number of recesses 32 on the lower surface of 5 in which the engager 31 engages and disengages.
will be established.

The recesses 32 are formed at regular intervals on a circumference concentric with the disc-shaped top plate 9, as indicated by chain lines in FIG.

The outer periphery of the lower surface of the guide plate 15 is formed into a slope as shown in FIG. Prevent from entering between 15 and 15.

Although not shown, hydraulic hoses communicating with the oil grooves 11 and 12 are connected to the rotating cylinder 10, and these hoses are connected to the front and rear of the hydraulic cylinder 6.

In addition, 35 in FIG. 1 is a lock pin that is detachably attached to the guide tube 36 fixed to the board 14.
When the lower end of this lock pin 35 is engaged with the engagement hole of the top plate 9, the crusher A will no longer rotate relative to the mounting frame 13.

The embodiment of this invention has the above-mentioned configuration, and each engager 31 is moved into the recess 3 of the guide plate 15 by the pressure of the spring 26.
2, the rotating barrel 10 is fixed to the mounting frame 13 unless a rotational force exceeding a certain level is applied to the rotating barrel 10.

Therefore, as shown in FIG. 4, the tip of the operating arm 37 of the power shovel is rotatably attached to the mounting frame 13 with a pin, and the luffing link 38 of the power shovel is also rotatably attached with a pin, thereby attaching the mounting frame to the mounting frame 13. 13 is integrated with the frame 1 and freely moves up and down, rises and falls, and turns with the body of the power shovel, so the frame 1 can be moved to any position and the crushing arms 4 and 5 can be opened and closed to crush concrete, etc. .

However, there is some concrete that cannot be grasped by the crushing arms 4 and 5 while the frame 1 remains integrally fixed to the mounting frame 13.

In such a case, in this embodiment, with the lock pin 35 removed from the engagement hole of the top plate 9, a part of the crusher A is strongly pressed against a hard, immovable part on the ground, and the arm 37 is moved. , the frame 1 rotates with respect to the mounting frame 13 together with the top plate 9 and the rotary tube 10, and the engager 31 is pushed out of the recess 32 and engaged with the next recess 32. In this way, the crushing operation is restarted with the crusher A being engaged and fixed in the predetermined recess 32 of the mounting frame 13.

In addition, when performing work that does not require a rotation function, the crusher A is attached to the mounting frame 13 by engaging the lock pin 35 with the engagement hole of the top plate 9 as shown in FIG.
Fixed to.

〔effect〕

This idea involves attaching the rotary cylinder attached to the crusher as described above so that it can rotate freely on a shaft fixed to a mounting frame attached to the operating arm of a power shovel, etc., and crushing the crusher by simply placing it against something and moving the arm. In a machine that can be easily rotated relative to the crusher's mounting frame and fixed with a click stop, the rotary cylinder fixed to the frame of the crusher and the shaft fixed to the mounting frame attached to the operating arm of a power shovel, etc. They fit together to form a rotary joint, and a spherical bearing is provided between the cylinder and the shaft, allowing the crusher to be rotatably supported with respect to the mounting frame, eliminating the need for large-diameter bearings. Since the bearing part is smaller and is a spherical bearing,
Even when a bending load is applied to the crusher, strain does not occur on the bearing part. In addition, since an oil hole is provided in the shaft of the rotary joint for supply and drainage, no matter how much the crusher is rotated relative to the mounting frame, the connecting part will not be twisted, eliminating damage to the hose, etc. It has the effect of making things easier.

[Brief explanation of drawings]

Figure 1 is an enlarged vertical sectional side view of the main parts of this device, Figure 2 is an enlarged longitudinal sectional front view of the click stop, and Figure 3
The figure is a side view of a crusher implementing this invention, FIG. 4 is a front view of the same, and FIG. 5 is an enlarged plan view of the top plate. 1... Frame, 4, 5... Crushing arm, 6...
... Hydraulic cylinder, 9 ... Top plate, 10 ... Rotating cylinder,
13... Mounting frame, 14... Board, 17... Shaft, 3
7... Operating arm, A... crusher, B... rotary joint, C... spherical bearing.

Claims (1)

[Scope of utility model registration request] It consists of a pair of crushing arms rotatably attached to the frame and a hydraulic cylinder that opens and closes the crushing arms, and the top plate on the frame is rotatably attached to the base plate of the mounting frame attached to the operating arm of the civil engineering machine. In a crusher in which a click stop is provided between the top plate of the frame and the base plate, a rotary cylinder fixed to the top plate of the frame and a shaft fixed to the base plate of the mounting frame are rotatable by spherical bearings and rotated in the axial direction. A crusher mounting device in which the rotary cylinders and the shaft are fitted together in an immovable manner to form a rotary joint that connects the hydraulic circuit on the mounting frame side and the hydraulic cylinder provided in the frame.