JP2000218184A - Crushing machine for scantling equipped with breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the function of a crushing press and the function of a breaker to be efficiently displayed respectively without causing a hindrance to each other by mounting a hydraulic breaker on a movable blade of the crushing press consisting of a fixed blade and the movable blade and actuating the hydraulic breaker when the movable blade is rotated to reach the fixed blade. SOLUTION: A crushing press 1 comprises a fixed blade 11 and a movable blade 12 and is installed inside the movable blade 12, using a pivotal shaft 3 as a fulcrum for switching the movable blade 12. The movable blade 12 is driven to be switched by a hydraulic cylinder 4 installed between the base mounting shaft 13 of the fixed blade 11 and the center mounting shaft 14 of the movable blade 12. A hydraulic breaker 2 is attached to the movable blade 12 and when the movable blade 12 is set in the operating mode, it is made to stand by with a chisel 21 directed outward of the movable blade 12 and retained as it is. When a stone is crushed using the breaker 2, the movable blade 12 is rotated toward the fixed blade 11 in such a state that the blade 12 is closed, and when the blade 12 is brought into contact with the fixed blade 11, the breaker 2 is set in a movable state. That is, the chisel 21 is made to protrude from the breaker 2 and used as a stone crushing bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher (crusher) at the tip of a power shovel to which a breaker is attached, and more particularly to a crusher for small splits.

[0002]

2. Description of the Related Art A crusher (crusher) at the tip of a power shovel, particularly a crusher for small crushers, is used to further crush rock roughly crushed by a large crusher so that it can be easily carried out. Among the used rocks, some of the treated rocks are too large for the jaws of the crusher for small crushers, or some of the crushed rocks take a long time to crush. Therefore, it is necessary to perform the work of crushing these rocks with the chisel of the hydraulic breaker in parallel with the work of the small crusher.

Recently, attempts have been made to perform the operation of the hydraulic breaker on the same machine as the small crusher. In this attempt, the hydraulic breaker was attached to the base of the fixed blade of the small crusher so as not to hinder the operation of the hydraulic breaker.

However, when a hydraulic breaker is mounted on a fixed blade of a crusher for small crushers, there are the following disadvantages. (1) Since the work of scraping the crushed material is performed by the entire fixed blade, it is difficult to scrape when the breaker is attached to the fixed blade. (2) In many cases, kneading work is performed with a fixed blade, such as peeling off the soil and finishing the foundation, and the work cannot be performed if a breaker is attached to the fixed blade.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems when a hydraulic breaker is mounted on a small crusher. The purpose of the present invention is to enable both functions to be sufficiently performed by the same excavator without adversely affecting the operation by the breaker.

[0006]

According to the present invention, a hydraulic breaker is mounted on a movable blade of a crusher comprising a fixed blade and a movable blade, and the hydraulic breaker operates when the movable blade rotates and reaches the fixed blade. It is intended to be.

Accordingly, when the crusher crushes the small rock by sandwiching it between the fixed blade and the movable blade, the hydraulic breaker is located at a position independent of the operation of the fixed blade and hinders the crushing operation. The operation of the chisel of the hydraulic breaker is performed after the movable blade is rotated and fixed to the fixed blade, so that the base of the hydraulic breaker is performed in a stable state, and the working efficiency of the hydraulic breaker is reduced. It does not drop.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an example of a secondary crusher for a shovel. FIGS. 1 and 2 show an outline in which a hydraulic breaker 2 is attached to a secondary crusher 1 for a shovel. FIG. 1 is a side view showing a state in which a blade is open, and FIG. 2 shows a state in which the blade is closed. It is a side view.

As shown in these figures, the crusher 1 comprises a fixed blade 11 and a movable blade 12, and is mounted inside the movable blade 12 with the pivot 3 as a fulcrum of opening and closing. The movable blade 12 is driven to open and close by a hydraulic cylinder 4 mounted between a first mounting shaft 13 at the base of the fixed blade 11 and a second mounting shaft 14 provided at the center of the movable blade 12.

The hydraulic breaker 2 is attached to the movable blade 12, and while the movable blade 12 is in the operating state, the chisel 21 is held in a state facing the outside of the movable blade 12, and is in a standby state. It is in. Then, when it becomes necessary to break the rock by the breaker 2, the movable blade 12 is closed and rotated toward the fixed blade 11, and when the movable blade 12 comes into contact with the fixed blade 11, the breaker 2 is movable. State.
When the breaker 2 is used, the chisel 21 is projected from the breaker 2 and used as a crushed rock.

In FIG. 1, reference numeral 15 denotes a stopper when the movable blade 12 is closed, and 16 denotes a stopper when the movable blade 12 is opened.

The rotation of the movable blade 12 and the breaker 2 can be performed by a hydraulic circuit 3 as shown in FIG. As shown in FIG. 3, the hydraulic circuit 5 has a main circuit from the shovel switching valve 51 to the rotating cylinder 52 of the movable blade 12. This main circuit includes a movable blade 1 as shown in FIG.
2 comprises a circuit A for closing and rotating toward the fixed blade 11 and a circuit B for opening and rotating.
On the way, the circuit branches to circuits a and b leading to a cylinder 53 for driving the breaker 2 to rotate. Reference numeral 54 denotes a solenoid mechanism for operating the breaker.

In this hydraulic circuit 3, when it becomes necessary to crush rocks by the breaker 2 during the small crushing process by the movable blade 12 and the fixed blade 11, the shovel switching valve 51 is used.
To introduce hydraulic oil into the movable blade rotating cylinder 52 through the A circuit. This causes the movable blade 12 to close and rotate in the direction shown by the arrow as shown in FIG. In this rotation, after the rotation of the movable blade 12 is stopped, the solenoid 54 is operated, and hydraulic oil is introduced into the branch circuit b.

Further, by switching the solenoid mechanism 54, hydraulic oil is introduced into the C circuit, and the breaker 2
The chisel 21 of the breaker 2 protrudes, and the massive rock is crushed by the chisel 21 of the breaker 2. At this time, since the breaker 2 is stably fixed on the movable blade 12 combined with the fixed blade 11, its operation does not become unstable.

Further, the crushing by the breaker 2 is completed,
At the stage of biting and crushing by the fixed blade 11 and the movable blade 12, the solenoid mechanism 54 is switched to retract the chisel 21 of the breaker 2, the shovel switching valve 51 is switched to open and rotate the movable blade 12, and the fixed blade 11 is rotated. And returns to the state before the breaker 2 was operated. Then, by operating the power shovel, the movable blade 12 can be returned to a operable state.

[0016]

According to the present invention, the following effects can be obtained. (1) The functions of the crusher and the breaker
Each function can be exhibited efficiently without any troubles. (2) Since the breaker is started in a stable state in which the crushing blades of the crusher are in contact with each other, safe work can be performed. (3) Since the crusher and the breaker can be separate mechanisms, there is no complicated design, assembly, and maintenance.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where a blade is opened in an embodiment of the present invention.

FIG. 2 is a side view showing a state where a blade is closed in the embodiment of the present invention.

FIG. 3 is an embodiment of a hydraulic circuit diagram for operating a hydraulic cylinder and a hydraulic breaker.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Crusher 11 Fixed blade 12 Movable blade 13 1st mounting shaft
14 Second mounting shaft 15, 16 Stopper 2 Hydraulic breaker 3 Pivot shaft 4 Hydraulic cylinder 5 Hydraulic circuit 51 Start valve 52 Movable blade rotating cylinder 53 Breaker driving cylinder 54 Solenoid mechanism A, B Main circuit a, b Branch circuit

Claims (1)

[Claims] 1. A hydraulic breaker is mounted on a movable blade of a crusher comprising a fixed blade and a movable blade, and the hydraulic breaker is adapted to be activated when the movable blade rotates and reaches the fixed blade. Crusher for small splitting.