Self-propelled crushing machine

Details Self-propelled crushing machine Self-propelled crushing machine

1996-04-04

1998-08-25

Husar, John M.

Solid material comminution or disintegration

Apparatus

With automatic control

24110174, 2411862, B02C 2102, B02C 2302

Patent

active

057975485

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a selfpropelled crushing machine for crushing a concrete waste and so forth in a site of taking down a building or so forth.
2. Background Art
As a self-propelled crushing machine, the machine, in which a crusher, a hopper coupled with the crusher and a driving device for driving the crusher are mounted on a vehicle chassis having a pair of left and right traveling bodies, and a discharge conveyer is provided beneath the vehicle chassis and between the pair of traveling bodies for pivoting up and down, as disclosed in Japanese Unexamined Utility Model Publication No. Sho 64-32744, has been known.
Such self-propelled crushing machine can travel alone and can crush concrete waste and so forth charged into the hopper into small pieces and discharge the crushed pieces externally by means of the discharge conveyer.
On the other hand, in such self-propelled crushing machine, the crushing object is located into the hopper by means of a loader machine, such as a hydraulic shovel and so forth and the loaded crushing object is then fed into the crusher by the hopper to perform crushing. When the excessive amount of crushing object beyond a capacity of the crusher is fed into the crusher, namely, when the crushing object is supplied in the excessive supply condition the crusher may stop, or, in more significant case, the crusher Per se may be damaged.
Therefore, conventionally, in addition to the operator of the loader machine such as the hydraulic shovel and so forth, a worker for controlling driving of the crusher rides on the self-propelling crushing machine to cause emergency stop of the crusher in the case that the crushing object is excessively supplied to the crusher. Therefore, two workers are required. In addition, there is a danger that the crushing object contacts with the worker in error upon charging the crushing object into the hopper by the loader.
Therefore, it is an object to provide a selfpropelled crushing machine which can effectively crush the crushing object by a single worker and will avoid any danger of hitting the worker by the crushing object.


SUMMARY OF THE INVENTION

In order to accomplish the above-mentioned object, one aspect of a self-propelled crushing machine according to the present invention, in the self-propelled crushing machine having a vehicle body, a traveling body mounted on the lower portion of the vehicle body, a crusher mounted on the upper portion of the vehicle body, and a hopper mounted on the upper portion of the vehicle body and having a feeder for supplying an object of crush to an inlet of the crusher, comprises crusher driving means for driving the crusher, excessive load detecting means for detecting whether an excessive load is acting on the crusher driving means or not, feeder driving means for driving the feeder, and control means for stopping the feeder driving means when excessive load is detected by the excessive load detecting means and actuating the feeder driving means when excessive load is not detected.
With the construction set forth above, when crushing object is excessively supplied to the crusher and excessive load acts, the feeder stops automatically. Then, the supply of the crushing object to the crusher is terminated, and when the crushing object is crushed and excessive load in the crusher disappears, the feeder is actuated again. Accordingly, the crusher will continue operation without stopping or being damaged. Thus, by charging the crushing object into the hopper by a loader, the crushing object can be automatically crushed. Also, the worker is not required to visually observe the crusher to drive and stop the crusher. Therefore, crushing of the crushing object can be efficiently performed by a single worker without danger of being hit by the crushing object.
Preferably, the crusher driving means comprises a crusher motor and a switching valve for the crusher for controlling supply of a pressurized fluid to the crusher motor,
the feeder driving means comp

REFERENCES:
patent: 4721257 (1988-01-01), Williams et al.
patent: 4793561 (1988-12-01), Burda
patent: 5074435 (1991-12-01), Suverkrop et al.
patent: 5566893 (1996-10-01), Getz
patent: 5580004 (1996-12-01), Tamura et al.

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