JPH09271690A - Mobile crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a bearing from being damaged and low frequency vibration from being generated caused by inclination of a car body by providing rake meters detecting respectively inclinations in the back and forth direction and in the left and right direction and an alarm generating device. SOLUTION: When a car body is inclined and output electric voltages of rake meters 27X and 27Y exceed a reference electric voltage, relays 30 and 31 or 33 and 34 are energized by driving circuits 32 and 35 and contact points 31a and 34a are closed and alarm lamps 36 and 37 are turned on to inform them to an driver. In addition, simultaneously, contact points 30b and 33b are opened and even when operational switches 24 and 26 are turned on, a pilot valve 22 and a control valve 20 are kept at neutral positions and a control valve 21 is also kept at a shutting position. Then, a hydraulic motor 9 for a crushing apparatus and a hydraulic motor 10 of a feeder are stopped or made not to be started. It is possible thereby for the driver to prevent inclination of the car body from being left as it is by recognizing the inclination of the car body and correcting the posture of the car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing crushed objects such as crushed stones, concrete blocks, and industrial wastes in a recycling plant, a crushed stone plant, etc., and a device for preventing adverse effects due to tilting of a vehicle body.

[0002]

2. Description of the Related Art A self-propelled crusher having a jaw crusher is for crushing an object to be crushed passing between both teeth by rotating an eccentric shaft by a motor to move a moving tooth with respect to a fixed tooth. The tilt of the crusher main body, that is, the body of the self-propelled crusher during work is mounted on the car body by a mechanical level that detects tilt in the front-rear and left-right directions, and the driver tilts from the bubble position of the level. Was judged and managed.

[0003]

As described above, in the conventional crusher in which the inclination of the main body is detected by using the level, the driver sometimes forgets to control the inclination. Crushing work is done while tilted,
Therefore, 1) uneven load is applied to the bearing of the crushing device,
The bearings may be damaged, or other bearings such as feeders and conveyors may be damaged. 2) Low-frequency vibration caused by the tilt causes discomfort to the worker who rides on the crusher and works. There was a problem that low-frequency vibrations shake the ground.

In view of the above problems, it is an object of the present invention to provide a self-propelled crusher having means capable of more reliably preventing damage to a bearing and low-frequency vibration caused by tilting of a vehicle body. .

[0005]

According to a first aspect of the present invention, an inclinometer for detecting tilts of the self-propelled crusher in the front-rear direction and the left-right direction, respectively, and an alarm when the tilt of the vehicle body is detected by the inclinometer. And a device for emitting the light.

The invention of claim 2 further comprises a device for stopping at least the feeder and the crushing device when the tilt of the vehicle body is detected by the inclinometer.

[0007]

According to the first aspect of the present invention, when the inclination angle of the vehicle body in the front-rear direction or the left-right direction exceeds a predetermined value, the alarm device is activated to warn the driver. The driver can eliminate the problem caused by the inclination by eliminating the inclination of the vehicle body based on the warning. In the second aspect, the feeder and the crushing device stop when the inclination angle of the vehicle body exceeds a predetermined value.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an electrohydraulic circuit diagram showing an embodiment of a self-propelled crusher according to the present invention, FIG. 2 is a detailed view of the electric circuit of FIG. 1, and FIG. 3 is a side view of the crusher of the embodiment. It is a figure. First, the structure of the crusher will be described with reference to FIG. The crusher of this example comprises a crusher 3, a feeder 4, and a conveyor 5 mounted on a vehicle body 1A on a lower traveling body 1 made of a crawler. The feeder 4 reciprocates the reciprocating frame 8 on the bottom surface of the hopper 2 toward the crushing device 3 by a hydraulic motor 10 via a conversion mechanism, and crushes stones, concrete blocks, industrial waste that are put into the hopper 2 by a hydraulic excavator or the like. The object to be crushed is supplied to the crushing device 3.

In the crushing device 3, the eccentric shaft 11 is rotated by a variable displacement hydraulic motor 9 via a power transmission mechanism including a pulley 14 and a belt 13, and the upper part of the eccentric shaft 11 is relatively rotatably fitted. By rotating the moving tooth 15 with respect to the fixed tooth 16 while moving the tooth closer to and away from the fixed tooth 16, the object to be crushed supplied between the teeth 15 and 16 is crushed. The conveyor 5 receives the crushed scraps crushed by the crusher 3 at one end and carries it out to the secondary conveyor 6 or the like from the other end.

In FIG. 1, reference numerals 18 and 19 denote hydraulic pumps mounted on the vehicle body 1A of the crusher, which actuate the hydraulic motor 9 for driving the crushing device 3 and the hydraulic motor 10 of the feeder 4, respectively. Reference numerals 20 and 21 are control valves for the hydraulic motors 9 and 10, respectively, and 22 is a pilot valve for the control valve 20. 23 is the car body 1
A power source mounted on A, 24 and 25 are forward and backward operation switches of the hydraulic motor 9 for the crushing device 3, and 26 is an operation switch of the feeder hydraulic motor 10.

Reference numeral 27 is an inclination detecting device for the vehicle body 1A, and the device 27 is an inclinometer 27x for the left-right direction of the vehicle body 1A.
And an inclinometer 27Y in the front-rear direction. The inclinometer 27 is attached to the vehicle body 1A as shown in FIG. Reference numerals 28 and 29 denote comparison circuits for comparing the measurement signals of the inclinometers 27X and 27Y with a reference signal and issuing a signal when the measurement signal exceeds the reference signal. The outputs of the comparison circuits 28 and 29 are the drive circuits 32 of the relays 30 and 31, respectively.
Is added to the drive circuit 35 of the relays 33 and 34. The relays 30 and 33 are b-contacts 30 inserted in the pilot circuit of the pilot valve 22 and the pilot circuit of the control valve 21, respectively, connected in series to each other.
b, 33b, the relays 31, 34 are provided with a warning light 36,
A-contact 31 inserted in each circuit connected to 37
a and 34a.

As shown in FIG. 2, the inclinometers 27X, 2
7Y specifically outputs the tilt angle as a voltage, and the comparison circuits 28 and 29 include the reference voltage generation circuits 37 and 3, respectively.
8 and the inclinometer 27X, 2
The output voltage of 7Y is compared, and the reference voltage is set to the inclinometer 27X,
When the output voltage of 27Y exceeds, the drive circuits 32 and 35 formed of Darlington-connected transistors are turned on to energize the relays 30, 31 or 33, 34. The reference voltage generated by the reference voltage generation circuits 38 and 39 outputs a voltage having an inclination angle of 5 degrees, for example.

In the circuits of FIGS. 1 and 2, when the vehicle body 1A is tilted and the output voltage of the inclinometer 27X or 27Y exceeds the reference voltage, the drive circuit 32 or 35 energizes the relays 30, 31 or 33, 34. So contact point 31
a or 34a is closed and the warning light 36 or 37 is turned on to notify the driver. At the same time when this alarm is issued, the contact 30b or 33b opens, so that the operation switch 24,
Even when 26 is turned on, the pilot valve 22 is in the neutral position, the control valve 20 is in the neutral position, and the control valve 21 is also in the shut-off position. Therefore, the hydraulic motor 9 of the crushing device 3 and the hydraulic motor 10 of the feeder 4 are in the off position. Stops or cannot start.

In the present invention, if the relays 31 and 34 are eliminated and only the alarm device is provided, the driver knows the inclination by turning on the warning light 36 or / and 37,
By correcting the inclination of the vehicle body 1A and making it horizontal, it is possible to prevent damage to the bearings such as the crushing device 3 and the occurrence of low-frequency vibration, and further to prevent the vibration from being transmitted to the ground. However, as in the present embodiment, by stopping the feeder 4 and the crushing device 3 at the time of tilting, it is possible to reliably prevent the adverse effect of tilting.

As the warning device, warning lights 36 and 3 are used.
Instead of 7, or in addition to the warning lights 36 and 37, a sound or sound generating device such as an alarm buzzer can be used.
Further, the detection signals of the inclinometers 27X and 27Y may be displayed numerically. The warning devices such as the warning lights 36 and 37 are preferably installed at a location on the vehicle body 1A near the location of the driver 40, as shown in FIG.

[0016]

According to the first aspect of the present invention, an alarm is issued when the vehicle body of the crusher is tilted. Therefore, the driver is informed of the inclination of the vehicle body, and the driver corrects the posture of the vehicle body by the alarm. This prevents the leaning of the vehicle body. Therefore, it is possible to more reliably prevent the wear and damage of the bearing and the occurrence of low frequency vibration caused by the inclination of the vehicle body.

According to the second aspect, since the feeder and the crushing device are stopped when the vehicle body leans, it is possible to more reliably prevent the adverse effect of the leaning of the vehicle body.

[Brief description of drawings]

FIG. 1 is an electrohydraulic circuit diagram showing an embodiment of a self-propelled crusher according to the present invention.

FIG. 2 is a detailed view of the electric circuit of FIG.

FIG. 3 is a side view of the crusher of the embodiment.

[Explanation of symbols]

1: Lower traveling body, 1A: Vehicle body, 2: Hopper, 3: Crushing device, 4: Feeder, 5: Conveyor, 9: Hydraulic motor for crushing device, 10: Hydraulic motor for feeder, 15: Dynamic teeth, 16: Fixed Tooth, 18, 19: hydraulic pump, 20, 2
1: Control valve, 22: Pilot valve, 27: Tilt detection device, 27X: Left and right inclinometer, 27Y: Front and back inclinometer, 28, 29: Comparison circuit, 30, 31, 3
3, 34: relay, 32, 35: drive circuit, 36,
37: warning light, 38, 39: reference voltage generating circuit

Claims (2)

[Claims] 1. An inclinometer for detecting the inclination of the self-propelled crusher in the front-back and left-right directions respectively, and a device for issuing an alarm when the inclination of the vehicle body is detected by the inclinometer. Self-propelled crusher. 2. The self-propelled crusher according to claim 1, further comprising a device for stopping at least the feeder and the crushing device when the inclination of the vehicle body is detected by the inclinometer.