JP2631611B2 - Jaw crusher gap adjusting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a crushing gap of a jaw crusher by semi-automatic operation.

[0002]

2. Description of the Related Art Conventionally, as a structure in which the crushing gap of a jaw crusher is adjusted by using the working force of a hydraulic cylinder, a hydraulic cylinder and a hydraulic fastening device are connected in series to a toggle block of the jaw crusher. A series connection is known (Japanese Utility Model Application Laid-Open No. 63-141638).

[0003] In this type of crushing gap adjusting device for a jaw crusher, when adjusting the crushing gap, the hydraulic clamping device is operated to make it relaxed, and then the hydraulic cylinder is operated to transmit the acting force to the toggle block. Then, the toggle block is moved so as to be positioned so as to obtain a predetermined crushing gap, and subsequently the hydraulic tightening device is operated to make the crushing gap adjustable so that the crushing gap can be adjusted. When the above-mentioned relaxed state is set, the compression spring of the tension bar is also simultaneously set in the relaxed state, so that the toggle block can be freely moved.

In the conventional apparatus for adjusting the crushing gap of a jaw crusher, the compressive force applied to the crushing material during operation of the jaw crusher is excessive. It is loaded by the mounting device and the hydraulic cylinder.

[0005]

However, in the above-mentioned conventional construction, since an excessive compressive force is applied to the hydraulic fastening device and the hydraulic cylinder, the hydraulic cylinder must have a large diameter or a high pressure. It is necessary to operate with the use of hydraulic oil. In addition, when adjusting the crushing gap, the compression spring of the tension rod needs to be manually brought into the relaxed state, so that the operation time for the adjustment cannot be reduced. Further, when adjusting the crushing gap, the crushing gap is adjusted while being measured by an operator or the like using a measuring tool, so that the working time for the adjustment cannot be similarly shortened, which is not preferable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to omit the application of a compressive force by crushing a toggle block of a jaw crusher using a hydraulic structure, and to adjust a crushing gap. Sometimes, an object of the present invention is to provide a crushing gap adjusting device of a jaw crusher which can perform an operation for adjustment using a control means and can shorten a working time for adjusting a crushing gap.

[0007]

According to the present invention, there is provided a toggle block in which a toggle plate is inserted between a movable member of a jaw crusher and a rear frame and is movable using a movable cylinder. A wedge unit for tightening and relaxing between the toggle block and the side frame, and a compression spring interposed on a tension rod pivotally attached to the lower end of the movable member to compress the compression spring and tighten it. A tightening unit for relaxing, a detecting means for detecting the movement when the toggle block is moved, and an operation instruction for outputting an operation command for the wedge unit, the moving cylinder, and the tightening unit in a predetermined order. Generating means and a wedge unit, a moving cylinder,
And a hydraulic system for operating the fastening unit.

[0008]

In this way, the compressive force acting on the toggle block during operation of the jaw crusher can be directly applied to the rear frame, so that the use of the hydraulic structure can be omitted and the wedge unit can be adjusted when adjusting the crushing clearance. In addition to the relaxation of the compression spring of the tension rod and the movement of the toggle block, the lower end of the movable member can be moved, so that the crushing gap can be adjusted.

In this case, the movement of the toggle block is detected by the detecting means, and the operation of the wedge unit, the moving cylinder, and the fastening unit can be achieved by the hydraulic system for performing the output operation of the operation command means and the control means. Further, since the crushing gap can be adjusted by a semi-automatic operation in which only the adjustment plate is manually inserted, the working time for the adjustment can be significantly reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a crushing gap adjusting device showing one embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part along line II in FIG. 1, FIG. 3 is a plan cross-sectional view of FIG. , FIG.
FIG. 5 is a configuration diagram of the fastening unit, and FIG.
It is the same control system diagram.

1 to 6, reference numeral 10 denotes a jaw crusher, for example, a single toggle crusher. Fixed teeth 14 are mounted on a front frame 13 using mounting means, and moving teeth 16 corresponding to the fixed teeth 14 are mounted. It is attached to the movable member 18 by means. The upper part of the movable member 18 is supported by an eccentric shaft 20.
Is rotatably supported by a bearing 22 disposed on an upper portion of the side frame 12. A rear frame 30 is fixed to a rear portion of the side frame 12, and a toggle block 26 in which a toggle plate 24 is inserted is provided on the side frame 12 between a lower portion of the movable member 18 and the rear frame 30. It is placed on the guide member 48 and is movable along the guide member 48. Between the end face of the toggle block 26 and the end face of the rear frame 30, a plurality of adjusting plates 2 capable of adjusting the thickness are provided.
8 are superposed and inserted, and by adjusting the thickness of the adjusting plate 28, the amount of movement of the movable member 18 is adjusted so that the crushing gap W becomes a predetermined gap.
A connecting rod 32 is attached to an end surface of the toggle block 26 and is connected to a piston rod of a moving cylinder 34 provided on the rear frame 30. By the operation of the moving cylinder 34, the toggle block 26 As described above, it is possible to move forward and backward along the guide member 48.

A connecting tool 35 is connected to the connecting rod 32.
Detecting means 36 for detecting the movement of the toggle block 26 via the interface is provided, and the signal of the movement amount is input to the operation command generating means 70 by using a sensor means (not shown). The detection of this movement is based on the fact that the new moving tooth 16 of the movable member 18 has come into contact with the new fixed tooth 14 from the first reference point, as well as the worn moving tooth 16 has come into contact with the worn fixed tooth 14. It is possible to detect the amount of movement of the movable member 18 from the second reference point to the maximum position at which the movable member 18 is allowed to operate. Therefore, new moving teeth 16 and fixed teeth 14
Are contacted, the first reference point and the second reference point are common. An inclined wedge surface 50 is formed on both sides of the upper end of the toggle block 26, and is placed on the guide member 48 by corners 49 formed on both sides of the lower end. A wedge unit 46 is interposed between the wedge surface 50 and the side frame 12, and the two are tightened and relaxed by utilizing the wedge action. A wedge cylinder 64 for generating a wedge effect is disposed outside the side frame 12, and an end of the piston rod 66 is connected to the upper wedge 58 and the lower wedge 60 of the wedge unit 46. The upper wedge 58 and the lower wedge 60 are integrally formed using bolts 62 with the ends of the piston rod 66 interposed therebetween, and the upper and lower surfaces are formed with inclined surfaces 57 and 59. , And the upper surface of the pressing member 52 is inserted into the lower end of the stopper 54. The wedge effect is performed under these engagement states. Further, the upper wedge 58 and the lower wedge 60,
The length of the pressing member 52 is longer than the width dimension of the toggle block 26, so that even when the toggle block 26 is moved, the above-described wedge effect can be reliably generated. At the lower end of the movable member 18, a tension rod 38 is connected via a pin 36 to a fastening unit 42 with a compression spring 40 interposed therebetween. The pull rod 38 is a rod 38
a and the piston rod 39 of the fastening unit 42. The compression spring 40 is interposed between a spring seat 41 provided on the rear frame 30 and a fastening unit 42, specifically, an end block 43b. The fastening unit 42 includes a fastening cylinder 43 having a piston rod 39 inserted therein and a tension cylinder 4.
5 and 5 are connected in series. The fastening cylinder 43 includes a sleeve 43a and end blocks 43 on both sides thereof.
b and 43c, and 43d is an inlet / outlet for hydraulic oil provided in the end block 43b. The sleeve 43a is formed of an elastic material, and its inner surface is
During the above-mentioned contact, a strong frictional force acts and the piston rod 39 is firmly held in an immovable state even when an external force is applied to the piston rod 39. And the end block 36b
When the operating oil flows from the inlet / outlet 43d, the tightness due to the contact is relaxed and released by the expansion of the sleeve 43a, and the piston rod 39 and the sleeve 43a can slide.

The tension cylinder 45 is an end block 45
a and 45b, and 45c is an inlet / outlet provided in the end block 45b. When the tightening cylinder 43 is held in a relaxed state, when hydraulic oil flows in from the inlet / outlet 45c, the tension cylinder 45 and the tightening cylinder 43 are moved in the direction of the movable member 18, and the compression spring 40 is compressed. When the predetermined amount of compression can be reached, the inflow of hydraulic oil is stopped, and subsequently, the tightening cylinder 43 is operated and tightened and held. In this manner, a tensile force acts on the tension bar 38, and the lower portion of the movable member 18 and the toggle plate 24 and the toggle block 26 are pressed against each other under a strong compressive force. Toggle plate 2 during exercise 18
4 is reliably linked without being dropped.

The amount of compression of the compression spring 40 is measured using a sensor (not shown) provided on the tightening unit 42 or the tension rod 38, and is further activated by a limit switch which is activated when a predetermined amount of compression is reached. Are displayed on the display unit 76 of the control means 72 described later.

During operation of the jaw crusher 10, the wedge unit 46 is actuated to tighten the toggle block 26 and the side frame 12, and the tension bar 38 is actuated by the tightening unit 42 to operate the compression spring 40. A tensile force is applied by compression to a required compression amount, and the movable member 18 swings by rotating the eccentric shaft 20 within a predetermined crushing gap W. At this time, the toggle plate 24 and the tension rod 38
And the periodic motion of the compression spring 40 is linked. Thus, the crushing material is compressed and crushed in the crushing chamber 15 and discharged as crushed product. The compressive force acting on the toggle block 26 from the movable member 18 due to the compressive crushing is directly applied to the rear frame 30 via the adjusting plate 28, and can sufficiently cope with the load.

At the time of adjusting the crushing gap W of the jaw crusher 10, the wedge unit 46 is operated to relax the gap between the toggle block 26 and the side frame 12, and the fastening unit 42 is operated to cause the fastening cylinder 43 to operate. After the tension is released from the tension bar 38 by the relaxation and restoration of the compression spring 40, the movable cylinder 34 is actuated to move the toggle block 26 along the guide member 48. Thus, when the crushing gap W is set to the predetermined gap, the adjusting plate 28 is inserted. Subsequently, the above-described reverse operation is performed to complete the adjusting operation, and the jaw crusher 10 is made operable.

The operation for adjusting the crushing gap W described above will be described in more detail with reference to FIG. When the crushing gap adjustment command is input to the control means 72 together with the crushing gap W command 74, the output signal is input to the operation command generation means 70, and the operation command from the operation command generation means 70 is sent to the control means 72 again. The input and output signals actuate the respective control valves of the hydraulic system 78 in a certain order, and the wedge unit 46, the moving unit 34, and the fastening unit 42 are operated as described above. At this time, the toggle block 26 is moved by the operation of the moving unit 34 until the movable teeth 16 of the movable member 18 reach the second reference point. The signal of the movement amount from the detection means 36 is input to the control means 72 together with the output signal from the operation command generation means 70, and the numerical value of the second reference point is output and displayed. Subsequently, the movement of the toggle block 26 with respect to the second reference point corresponding to the crushing gap W command 74 is controlled by the control means 72 to control the hydraulic system 78 based on the calculation considering the geometric parameters of the movable mechanism of the jaw crusher 10. Given to the moving cylinder 34 via a control valve, the toggle block 26 is positioned. At this time, a signal of the movement amount from the detection means 36 is input to the control means 72 as an operation signal and is calculated, and as a result of the calculation, "fracture gap size", required "adjustment plate thickness" and "tooth plate wear amount" are displayed. It is displayed on the unit 76. The above-mentioned "fracture gap size" is calculated by calculating the difference between the toggle block 26 and the amount of movement when positioning with reference to the second reference point when the toggle block 26 is moved. For the required "adjustment plate thickness", the difference between the movement amount and the rear frame position dimension is calculated when the toggle block 26 is positioned, and the calculation result is displayed. As for the "tooth plate wear amount", a difference between the first reference point position and the second reference point position is calculated, and the calculation result is displayed. By the operation described above, the adjustment of the crushing gap W of the jaw crusher 10 is completed, and the jaw crusher 10 is made operable. During operation, numerical data such as “crushing gap size”, “adjustment plate thickness”, “tooth plate wear amount”, and “compression amount” of the compression spring can be constantly monitored by the display unit 76. Monitoring and improvement of crushing performance and maintenance management of tooth plate replacement can be ensured.

[0018]

As described above, according to the present invention, the toggle block of the jaw crusher can be omitted from applying a compressive force due to crushing by using a hydraulic structure, and the movement of the toggle block is adjusted when the crushing gap is adjusted. Each operation according to a certain order is achieved by the hydraulic system that performs the output operation of the control means, and it is possible to adjust the crushing gap by semi-automatic operation by manually inserting only the adjusting plate, so that the adjustment Work time can be significantly reduced. Also, since the operation-related numerical data can be constantly monitored during the operation of the jaw crusher, a great effect is achieved, such as improved monitoring of the crushing performance of the jaw crusher, maintenance management of tooth plate replacement, and the like.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a crushing gap adjusting device showing one embodiment of the present invention.

FIG. 2 is a sectional view of an essential part taken along line II in FIG.

FIG. 3 is a plan sectional view of FIG. 2;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a configuration diagram of the fastening unit.

FIG. 6 is a control system diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Jaw crusher 18 Movable member 24 Toggle plate 26 Toggle block 30 Rear frame 34 Moving cylinder 36 Detecting means 38 Tension rod 40 Compression spring 42 Tightening unit 46 Wedge unit 70 Operation command generating means 72 Control means 78 Hydraulic system

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsukasa Katayama 1780 Kamikono, Yachiyo-shi, Chiba Pref.

Claims (2)

(57) [Claims] 1. A toggle block which is inserted between a movable member of a jaw crusher and a rear frame and is movable by using a movable cylinder, and tightly and loosens between the toggle block and the side frame. A wedge unit for moving the toggle block, a tensioning unit pivotally attached to the lower end of the movable member, a compression spring being interposed, and a tensioning unit for compressing and tightening / relaxing the compression spring; Detecting means for detecting the movement, operation command generating means for outputting an operation command to the wedge unit, the moving cylinder, and the fastening unit in a predetermined order; and a wedge unit, a moving cylinder, and a fastening device according to the operation command. A crushing gap adjusting device for a jaw crusher, comprising: a hydraulic system for operating a unit. 2. The operation command generating means is connected to control means for inputting an operation signal for calculating and displaying a crushing gap size, an adjustment plate thickness, and a tooth plate wear amount. Item 6. The jaw crusher crushing gap adjusting device according to Item 1.