JP2626862B2 - Crushing plant drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a crushing plant , and more particularly to a driving device for a crushing plant in which a crusher is mounted on a cradle provided with a crawler.

[0002]

2. Description of the Related Art Conventionally, a crusher is mounted on a base provided with a crawler.
As a driving device of the crushing plant equipped with, the electric motor is rotated by the electric power generated by the engine generator,
A crusher and a conveyor that drives a crawler such as a conveyor are known (Japanese Patent Application Laid-Open No. 63-77553).

[0003] In this type of crushing plant driving device,
When the crusher is started, an excessive load may be applied to the engine generator, which may hinder the smooth operation of the engine generator.

[0004]

However, in the above-mentioned conventional construction, the driving power of the crusher is used for the output of the engine under the combined efficiency of the generator and the electric motor. The fuel cost of the engine and the equipment cost.

Further, in a drive device or the like in which an electromagnetic clutch or the like is connected to an engine, an excessive impact load is applied to the engine or the electromagnetic clutch when the crusher is started, which may cause early damage. However, no device for removing these occurrences is provided, which is not preferable.

The present invention has been made to solve the above-mentioned problems of the prior art. When the crusher of the crushing plant is started, the crusher is started slowly by the joint means, and the start of the crusher and It is an object of the present invention to provide a driving device for a crushing plant that can effectively prevent an excessive load from being applied to an engine when an abnormal load occurs during rated operation.

[0007]

In order to achieve the above object, according to the present invention, there is provided an engine, a distributor connected to an output end of the engine and having a plurality of output shafts, and an output shaft of one of the distributors. is connected, a coupling means for the transmission torque for driving the crusher is variable, the oil pressure to the connected to the other output shaft of the dispenser, and selectively driving <br/> moving the equipment of the crawler and crushing plant It is characterized by comprising a hydraulic circuit equipped with a pump, and a driving device of the crushing plant includes a coupling means.
After a certain period of time has elapsed since the
And the crusher rotation speed are constantly detected, and the engine and crusher
If the speed difference of the joint means is equal to or greater than a predetermined speed difference,
For cutting off the engine and stopping the engine
And a unit .

[0008]

In this way, when the crusher of the crushing plant is started, the coupling means is connected at the idle rotation speed of the engine under a low operating force, and then the rotation speed of the engine is gradually increased. After the rotation speed with the engine is made constant, a high operating force is applied to the joint means, and the crusher rotation speed is shifted to the rated operation without applying an excessive load to the engine. Further, when an abnormal load of the crusher occurs, by detecting an abnormality in the rotational speed of the crusher, the coupling means is automatically connected / disconnected and the engine is stopped. Thus, crushing plastic and can effectively prevent the excessive load burden on the engine
It can allow smooth driving of the cement of the crusher.
In addition, the crawler is operated by operating the hydraulic circuit by the control unit.
And the crushing plant equipment can be selectively driven.
Wear.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a crushing plastic showing one embodiment of the present invention.
Circuit diagram of the cement of the drive unit, FIG. 2 is a fragmentary sectional view of a dispensing machine of the same driving device, FIG. 3 is a startup curve diagram of the drive unit. 1 to 3, the driving device 10 includes a crawler 42,
Advance the crusher 24 and the crawler 42, 46 in the crushing plant equipped with a crusher 24 on the cradle and the 46
It is used for power transmission of the engine 12 (for example, a diesel engine) to equipment of a crushing plant .

The distributor 12 is provided at the output end of the engine 12 with a joint 56 via an adapter. An input end 58 attached to the joint 56 has a first gear 60 having a first gear 60.
The engine 12 is moved to the second output shaft 26 having a second gear 62 which is used as the output shaft 16 and is on the driven side of the first gear 60 and the second output shaft 28 not shown in FIG.
Are respectively distributed. The first output shaft 16 is a crusher 24
And the second output shafts 26, 28 are used for driving hydraulic pumps 30 , 32 for selectively driving the crawlers 42, 46 or hydraulic equipment of the crushing plant.

The output end of the first output shaft 16 is connected to the intermediate shaft 17 via coupling means, for example, a wet multi-plate clutch 68. Further, a pulley 18 and the like are provided at the end of the intermediate shaft 17, For example, a crusher 2 via a V-belt or the like
4 is connected to the input shaft 22 of the crusher 24.
Is formed.

The distributor 14 has a casing 64 and is disposed at an end of the engine 12 with a connecting member 66. An oil reservoir is formed inside the casing 64, and the wet multi-plate clutch 68 has a piston 70 provided at an end thereof.
Is operated to connect or disconnect the clutch 68. The hydraulic pressure is switched between high pressure and low pressure to operate, and the clutch 68 is connected under a high operating force or a low operating force. The movement of the piston 70 is performed by the inflow and outflow of hydraulic oil into and from a passage 72 having an entrance 74. The passage 72 is also branched to a disk portion, through which hydraulic oil is circulated and a wet clutch operation is performed. Friction heat generated by the operation of the clutch 68 is forcibly cooled by using a coolant or the like through a passage (not shown).

The second output shafts 26 and 28 are connected to the hydraulic pump 3
Coupled to 0,32, the pressure fluid system of the hydraulic circuit for driving the traveling apparatus crawler 42,46 with high-pressure working fluid is generated pressure fluid by driving through the hydraulic manifold 34, 36 of the hydraulic pump 30, 32 In addition, another hydraulic fluid system of a hydraulic circuit for driving hydraulic motors 38 and 40 serving as a driving source of a crushing plant conveyor and the like via a switching valve via a hydraulic pressure and manifolds 34 and 36 is formed.

The control unit 50 starts the engine 1 2, stop and connect or disconnect a driving apparatus 1 0 of the electromagnetic clutch
This controls the driving operation. By the operation of the control unit 50 the engine 1 2 is started, is operated under a set of idling rotational speed forming part of the set value 51, wet multi-plate clutch 68 is in the disconnected state, the first output shaft 16 and only the second output shafts 26 and 28 are rotated,
The hydraulic pumps 30, 32 are driven by the second output shafts 26, 28 , and pressure fluid of the hydraulic circuit is generated. Control unit 50
Is selected, and the operation of the engine 1
2 is raised to the rated rotation speed, and the operation of the control valves in the pressure fluid system causes the crawlers 42 and 46 to perform running and turning operations. When the crushing mode of the control unit 50 is selected and hydraulic equipment such as a conveyor of a crushing plant and a vibrating sieve are started by button operation, and then the crusher 24 is started by another button operation, the signal 48 It acts low hydraulic pressure on the piston 70 under, (indicating at time t ₁₎ wet multi-plate clutch 68 to make under connection of a low operating force. Rotational speed of the engine 12 is idling rotational speed n ₁ is continued, with an increase in rotational speed of the intermediate shaft 17, the input shaft 22 of the crusher 24 gradually rises from the rotational speed nc _0. This

On the other hand, the engine 12 and the crusher 24 (represented by the pulley 18) are provided with speed sensors 52 and 54, respectively. n and nc are stored. Wet multi-plate clutch 68 for a predetermined time from the time t ₁ which is articulated under the low operating force, at time t ₃ when passed for example about 25 seconds, the detection of the speed n and nc performed,
If the two speeds are the same, the crusher 24 has detected that it is in a normal state, and a signal 48 is output from the control unit 50, and the high pressure oil pressure acts on the piston 70 of the wet multi-plate clutch 68. The wet multi-plate clutch 68 is connected under a high operating force to further increase the friction of the disk portion to increase the transmission torque, and a signal 79 is output from the control portion 50 to control the fuel system of the engine 12. rotational speed of the operation is allowed by the engine 12 is raised from the idle rotational speed n ₁ to a rated rotational speed n _4, leading to increase the rotational speed of the crusher 24 from the rotational speed nc ₁ under the same rate until nc ₄ simultaneously . Thus, the buffered start-up is smoothly completed without imposing an excessive load on the engine 12, and subsequently, the operation is shifted to the normal rated operation, and the crushing of the material is started.

[0016] In FIG. 3, one shown in dotted lines driven side of the plate clutch 68, i.e., an excessive load is generated in the crusher 24, the rotational speed n of the crusher 24 from the time point t ₁
It is detected that the rise of c is not smooth and the crusher 24 is in an abnormal state. The abnormal signal in the control unit 50 causes the wet multi-plate clutch 68 to be disconnected by the signal 48 to stop the crusher 24 and the signal 79 to
Is stopped to protect the engine 12 and the crusher 24 and other equipment from damage.

As described above, according to the present invention,
The crusher can be started gently and smoothly by the coupling means that performs a sliding operation when the crusher of the crushing plant having a large moment of inertia is started, so that an excessive load on the engine can be effectively prevented. Further, when an abnormal state occurs in the crusher, the abnormal state is detected and the operation of the crusher, the engine, and the hydraulic equipment of the crushing plant is stopped, so that damage to these equipment can be effectively prevented. Further, since the clutch means is provided in the distributor, the configuration of the entire driving device of the crushing plant can be simplified.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a driving device of a crushing plant showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a distributor of the driving device.

FIG. 3 is a startup curve diagram of the driving device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Drive device 12 Engine 14 Distributor 16 1st output shaft 17 Intermediate shaft 24 Crusher 26, 28 2nd output shaft 42, 46 Crawler 50 Control part 68 Wet multi-plate clutch

Claims (2)

(57) [Claims] And 1. A engine, connected to an output terminal of the engine, a dispensing machine having a plurality of output shafts are connected to one output shaft of the distributor, coupling means for the transmission torque for driving the crusher is variable And connected to another output shaft of the distributor ,
And drive of the crushing plant, characterized in that consists of a hydraulic circuit including a hydraulic pump for selectively driving the device of the crawler and crushing plant. 2. The driving of the crushing plant according to claim 1.
In the apparatus, the drive device always detects the engine rotation speed and the crusher rotation speed after a lapse of a predetermined time from the time when the coupling means is connected, and the speed difference between the engine and the crusher becomes equal to or more than the predetermined speed difference. and if, as well as cutting the coupling means, the driving device of the crushing plant, characterized in <br/> further comprising a controller for stopping the engine.