JP3691576B2 - Jaw crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to an improvement of a jaw crusher, and more particularly, a technical field of a jaw crusher that makes it possible to easily adjust an outlet clearance of a crushed product formed below a fixed jaw plate and a swing jaw plate. Belonging to.
[0002]
[Prior art]
As is well known, the jaw crusher gradually wears the crushing teeth of the fixed jaw plate and the crushing tooth of the swing jaw plate as the crushing work of rocks and other objects to be crushed, and the crushing formed under these plates. The product exit gap is enlarged. When the outlet gap of the crushed product is enlarged, it becomes impossible to obtain a crushed product having a particle size within a predetermined particle size range. Conventionally, such an outlet clearance adjusting device has been usually performed manually.
[0003]
In other words, manually move the lower side of the swing jaw to the fixed jaw plate side and insert a shim into the open space to adjust the outlet clearance of the crushing product formed below the fixed jaw plate and the swing jaw plate Was. In the manual exit clearance adjustment device, for example, when two workers perform the exit clearance adjustment work, it takes about 2 to 3 hours, and an exit clearance adjustment device capable of performing the exit clearance adjustment work with higher efficiency can be realized. It was desired. In view of such circumstances, an outlet gap adjusting device that can automatically adjust the outlet gap has been considered. Among them, for example, those disclosed in Japanese Utility Model Laid-Open No. 7-9436 are known. .
[0004]
Hereinafter, the jaw crusher provided with the “exit clearance adjusting device” according to the conventional example disclosed in the above publication is shown in FIG. 10 (a) in the longitudinal side view and along the line CC in FIG. 10 (a). Referring to FIG. 10B which is a cross-sectional view, reference numeral 51 denotes a known single toggle type jaw crusher. That is, the jaw crusher 51 includes a swing jaw 54 that is swung so as to approach and separate from the fixed jaw 53 by the rotation of an eccentric shaft 55 provided on the frame 52. The side is supported on the other end side of a toggle plate 56 supported at one end side by a toggle block 57 described later. The toggle block 57 is attached to a cross member 58 fixed to the frame 52 of the jaw crusher 51 so as to be slidable back and forth.
[0005]
A pair of left and right symmetrical wedges 59, 59 that are movable in the left-right direction are mounted on the rear part of the cross member 58, and the front and rear slopes of the wedges 59, 59 are formed on the left and right sides of the toggle block 57. It is in sliding contact with a symmetrical slope. A screw jack mechanism 60 is provided that includes an electric motor M that moves these wedges 59 and 59 closer to or away from each other and a screw shaft 60a that is rotated forward and backward by the electric motor M. Reference numeral 61 is a tension rod, also sign 62 is a tension spring which imparts tension pulls the swing jaw 54 to the tension rod 61 to the cross member 5 8 side.
[0006]
Therefore, when the screw shaft 60a of the screw jack mechanism 60 is rotated to bring the wedges 59 and 59 closer, the toggle block 57 slides forward, and the lower rear portion of the swing jaw 54 is pushed forward by the toggle plate 56. Accordingly, the gap between the lower ends of the fixed jaw 53 and the swing jaw 54 is narrowed to adjust the outlet gap.
[0007]
[Problems to be solved by the invention]
According to the “horizontal automatic gap adjusting device” of the jaw crusher according to the above-described conventional example, the outlet gap can be adjusted only by rotating the screw shaft 60a of the screw jack mechanism 60 by the electric motor M. This is superior in that the exit gap can be adjusted in a much shorter time than the gap adjustment work.
[0008]
However, as well understood from FIG. 10 (a), before adjusting the gap that is the outlet of the crushed product, the nut 63 and the lock nut 63 that compress the tension spring 62 to apply a tensile force to the tension rod 61. ′ To release the tension force applied to the tension rod 61 by the tension spring 62, and after the adjustment of the gap, the nut is resisted against the strong spring force of the tension spring 62 in order to apply the tension force to the tension rod 61. In addition to the heavy labor of tightening 63, in order to slide both wedges 59, 59 and toggle block 57 in contact, the contact surface between these wedges 59, 59 and toggle block 57 is rough. It is easy to repair the contact surface and increase the frequency of replacement of the wedge 59, 59 and the toggle block 57. A.
[0009]
Therefore, the object of the present invention is to release the tensile force on the tension rod and to eliminate the manual work for applying the tensile force and to ensure the roughening of the contact surface between the wedge and the toggle block. It is in providing a jaw crusher that makes it possible to prevent.
[0010]
[Means for Solving the Problems]
In order to solve the above problem, the means adopted by the jaw crusher according to claim 1 of the present invention includes a fixed jaw plate and a swing jaw plate on the fixed jaw plate side, and approaches and separates from the fixed jaw plate. a swing jaw repeating movement, fixed jaw through the lower side, the toggle plate of the swing jaw in order to adjust the outlet clearance of the fracture砕製products that are formed on the lower side of these fixed jaw plate and the swing jaw plate A toggle block attached to the back frame that moves to the plate side, a clearance adjustment cylinder that is disposed on the anti-swing jaw side of the back frame and moves the toggle block to the swing jaw side, and the back frame and toggle block Wedge operating cylinder that inserts and removes wedge between , The back end side in the anti-swing jaw side of the frame is disposed is押盤the other end with the abutment, a pair of tensioning the tension rod formed by connecting via the rod coupling pin to the swing jaw and tension spring, one end of which is pivotally connected to the anti-swing jaw side of the back frame, and pressed through the pressure frame and the other end of the side押盤of the pair of tension springs, and tension spring compressed to release the pressing force A cylinder and a guide frame provided on the anti-swing jaw side of the back frame and having a guide portion that guides the pressure frame so as to reciprocate in a direction approaching and separating from the back frame. To do.
[0011]
The means adopted by the jaw crusher according to claim 2 of the present invention is the jaw crusher according to claim 1, characterized in that a low friction member made of a detachable resin is provided in the guide portion of the guide frame. To do.
[0012]
The means adopted by the jaw crusher according to claim 3 of the present invention is the jaw crusher according to claim 1 or 2 , wherein a spring washer is attached to the push plate, and a spring washer is attached to the spring washer side of the pressure frame. A round bar to be pressed is provided.
[0013]
The means adopted by the jaw crusher according to claim 4 of the present invention is characterized in that in the jaw crusher according to claim 3 , the contact surface of the round bar of the spring washer is concave .
[0014]
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 is a partially omitted side cross-sectional view of FIG. 1, FIG. 2 is a cross-sectional view of the A-A line of FIG. 1, and FIG. 1 is a cross-sectional view of the BB line of FIG. Refer sequentially to FIG. 3 (the upper side shows the compressed state of the tension spring and the lower side shows the released state of the compression force of the tension spring) and FIGS. 4 to 9 in the explanatory diagram of the procedure of adjusting the outlet clearance of the jaw crusher. While explaining.
[0016]
Reference numeral 1 shown in FIG. 1 is a jaw crusher. In such a jaw crusher 1, a fixed jaw plate 3 is fixed to the front frame 2 vertically with the crushing rod 3a facing the front frame 2 side. Further, the swing with the crushing rod 7a directed to the fixed jaw plate 3 side that repeats the movement toward and away from the fixed jaw plate 3 by the rotation of the eccentric shaft 8 supported by the side frame 2 '. A swing jaw 6 to which a jaw plate 7 is fixed is provided.
[0017]
A back frame constituting a part of an outlet gap adjusting device 10 to be described later on the surface of the swing jaw 6 side of the back frame 4 on the side opposite to the swing jaw plate 7 of the swing jaw 6 at a predetermined interval in the vertical direction. The horizontal ribs 11 and 11 'are fixed, and a tension rod 9 (as shown in FIG. 3) that passes through the back frame 4 and can move in the longitudinal direction at a lower position of the lower back frame horizontal rib 11' The tip of the swing jaw 6 is connected to the lower part of the swing jaw 6 on the side opposite to the swing jaw plate 7 via a pin. A push plate 22 is attached to the rear ends of the tension rods 9 and 9, and tension springs 21 are interposed between the back frame 4 and the push plate 22.
[0018]
Also, a tension spring compression cylinder 23 (described later) that compresses the tension springs 21 and 21 and releases the compressive force between the pair of tension springs 21 and 21 on the anti-swing jaw 6 side of the back frame 4. Is arranged. The tip of the rod of the tension spring compression cylinder 23 is guided by guide grooves 5a provided on both sides in the width direction of the guide frame 5 protruding rearward from the back frame horizontal ribs 11 and 11 'supporting the back frame 4. The pressure frame 24 is connected to the pair of tension springs 21 and 21 through the press plate 22 and can be moved in the front-rear direction, ie, the direction approaching and separating from the swing jaw 6.
[0019]
That is, the pair of tension springs 21 and 21 can be evenly compressed by guiding the pressure frame 24 with the guide groove 5a. A low friction member 5b made of resin, that is, nylon, is detachably attached to the guide groove 5a by mechanical fastening means such as a countersunk bolt. As a result, when the guide surface is rough, the repair of the guide groove 5a is completed only by replacing the low friction member 5b, and the repair time can be shortened.
[0020]
A spring washer 22a having a concave contact surface is provided on the pressure frame 24 side of the press plate 22, and a contact portion of the pressure frame 24 with respect to the spring washer contact surface is a round bar. A round pressing body 24a is provided. Therefore, even if the tension spring 21 is inclined, the tension spring 21 can be accurately compressed.
[0021]
Next, the configuration of the outlet gap adjusting device 10 will be described. The back frame 4 has an inclined surface 12a on the back frame 4 side above the tension rod 9 on the surface on the swing jaw 6 side of the back frame 4, and the back frame horizontal rib. There is provided a toggle block 12 which is moved to the swing jaw 6 side by extension of the rod of the gap adjusting cylinder 13 held horizontally between 11 and 11 '. The movement of the toggle block 12 is transmitted to a position above the connecting position of the tension rod 9 of the swing jaw 6 via the toggle plate 14 so that the lower side of the swing jaw 6 is moved toward the fixed jaw plate 3. It is configured.
[0022]
And between the inclined surface 12a of the toggle block 12 and the surface of the back frame 4 on the swing jaw 6 side, a wedge 15 with an acute angle portion facing downward is interposed. As shown in FIG. 2, the wedge 15 is provided with a notch 15a that opens upward on the thick portion side. A pair of detachable pin mounting brackets 19, 19 for connecting a connecting pin 18 provided at the tip of a rod of a wedge operating cylinder 17, which will be described later, to the wedge 15, is provided on the opposing inner surface of the notch 15 a. Is installed.
[0023]
As shown in FIG. 1, the wedge operating cylinder 17 is attached to a cylinder support 16 fixed on the upper back frame horizontal rib 11. The cylinder support 16 is rotated with a hinge pin as a fulcrum so that the wedge operating cylinder 17 in the vertical state is inclined rearward, and the wedge operating cylinder 17 is in the vertical state. In some cases, it is fixed by a detachable support fixture 20. That is, when the wedge operating cylinder 17 is maintained in the vertical state, the connecting pin 18 provided at the tip of the rod of the wedge operating cylinder 17 is connected to the wedge 15 by the pin mounting brackets 19, 19. When the operating cylinder 17 is inclined, the wedge operating cylinder 17 and the wedge 15 are separated by removing the pin mounting brackets 19 and 19.
[0024]
Hereinafter, the operation mode of the jaw crusher 1 having the above configuration will be described with reference to FIGS. That is, before the adjustment of the outlet gap t of the jaw crusher 1, as shown in FIG. 4, the rod of the gap adjustment cylinder 13 is reduced, while the rod of the tension spring compression cylinder 23 is extended, and the tension rod 9 A tension force is applied to the spring force of the tension spring 21.
[0025]
As the crushing object such as rock is continued to be crushed by the jaw crusher 1 in the state shown in FIG. 4, the fixed jaw plate 3 and the crushing rod 3a of the fixed jaw plate 3 and the crushing rod 7a of the swing jaw plate 7 are worn. When the outlet gap t which is the outlet of the crushed product formed on the lower side of the swing jaw plate 7 is widened, the outlet gap t of the jaw crusher 1 is adjusted to a predetermined interval. As shown in FIG. 3, the tension spring compression cylinder 23 is reduced in size, and the tension spring 21 is compressed via the pressure frame 24, the round pressing body 24a, the spring washer 22a, and the press plate 22, and the tension rod by the tension spring 21 is compressed. Release the tensile force against 9.
[0026]
When the tension force on the tension rod 9 is released by the compression of the tension spring 21, as shown in FIG. 6, the outlet gap t between the lower side of the fixed jaw plate 3 and the lower side of the swing jaw plate 7 has a predetermined dimension. The rod of the gap adjusting cylinder 13 is extended so that the lower side of the swing jaw 6 is pushed and moved through the toggle block 12 and the toggle plate 14. As a result, a gap is generated between the inclined surface 12a of the toggle block 12 and the inclined surface of the wedge.
[0027]
When the exit clearance t reaches a predetermined size due to the extension of the rod of the clearance adjustment cylinder 13, the wedge is formed as shown in FIG. 7 in order to fill the clearance formed between the inclined surface 12a of the toggle block 12 and the inclined surface of the wedge. The rod of the working cylinder 17 is extended, and the wedge 15 is lowered until the inclined surface of the wedge 15 contacts the inclined surface 12a of the toggle block 12.
[0028]
When the wedge 15 is lowered and the inclined surface of the wedge 15 comes into contact with the inclined surface 12a of the toggle block 12, as shown in FIG. 8, the rod of the gap adjusting cylinder 13 is contracted to move the toggle block 12 to the wedge 15 side. The wedge 15 is pressed and fixed by the toggle block 12. As shown in FIG. 9, when the rod of the tension spring compression cylinder 23 is extended and the compression force of the tension spring 21 is released, a tensile force due to the spring force of the tension spring 21 acts on the tension rod 9, and the jaw crusher. 1 is restored to a state where it can be restarted.
[0029]
As described above, since the tension force can be released and applied to the tension rod 9 simply by expanding and contracting the rod of the tension spring compression cylinder 23, the nut is loosened and tightened as compared with the conventional example. The operation of releasing / applying the tensile force to the tension rod is extremely easy and can be completed in a very short time.
[0030]
Further, when adjusting the outlet clearance t, the wedge 15 is inserted between the back frame 4 and the inclined surface 12a of the toggle block 12 by the operation of the wedge operating cylinder 17, so that the inclined surface 12a of the back frame 4 and the toggle block 12 is obtained. Since the wedge and the toggle block are not slid in contact with each other as in the prior art, the inclined surface 12a of the toggle block 12 and the inclined surface of the wedge 15 are rough. Therefore, the frequency of repairing the contact surface and replacement of the toggle block 12 and the wedge 15 is reduced.
[0031]
Although the case where the technical idea of the present invention is applied to a single toggle type jaw crusher has been described above, the technical idea of the present invention is also applied to a double toggle type jaw crusher having a well-known configuration. Therefore, the scope of the technical idea of the present invention is not limited by the above embodiment.
[0032]
【The invention's effect】
As described in detail above, according to the jaw crusher according to claims 1 to 5 of the present invention, it is possible to release and apply the tensile force to the tension rod only by expanding and contracting the rod of the tension spring compression cylinder. Compared to the conventional example that requires a nut loosening operation and a tightening operation, the tension force can be released and applied to the tension rod very easily and can be completed in a very short time. In addition, when adjusting the exit gap, the wedge block and the toggle block are not slid in contact with each other, but a wedge is simply inserted between the back frame and the toggle block. The inclined surface and the inclined surface of the wedge are not roughened, and there is an extremely excellent effect that the contact surface is repaired and the replacement frequency of the toggle block and the wedge is reduced.
[Brief description of the drawings]
FIG. 1 is a partially omitted side sectional view of a jaw crusher according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
FIG. 5 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
FIG. 6 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
FIG. 7 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
FIG. 8 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
FIG. 9 is an explanatory diagram of an outlet clearance adjustment procedure according to the embodiment of the present invention.
[10] relates to the conventional example, FIG. 10 (a) along a longitudinal side view of a jaw crusher provided with a "horizontal automatic clearance adjustment device", line C-C in FIG. 10 (b) 10 (a) It is sectional drawing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Jaw crusher, 2 ... Front frame, 2 '... Side frame, 3 ... Fixed jaw plate, 3a ... Shredder rod, 4 ... Back frame, 5 ... Guide frame, 5a ... Guide groove, 5b ... Low friction member, 6 ... Swing jaw, 7 ... Swing jaw plate, 7a ... Fracture shaft, 8 ... Eccentric shaft, 9 ... Tension rod, 10 ... Exit gap adjusting device, 11 ... Back frame horizontal rib (upper side), 11 '... Back frame horizontal rib (lower side) Side), 12 ... toggle block, 12a ... inclined surface, 13 ... gap adjusting cylinder, 14 ... toggle plate, 15 ... wedge, 15a ... notch, 16 ... cylinder support, 17 ... wedge working cylinder, 18 ... connecting pin, 19 ... Pin mounting bracket, 20 ... Support fixing bracket, 21 ... Tension spring, 22 ... Presser, 22a ... Spring washer 23 ... tension spring compression cylinder, 24 ... Pressure frame, 24a ... round the pressing body, t ... outlet clearance.

Claims (4)

A fixed jaw plate comprising swing jaw plate on the fixed jaw plate side, and the swing jaw repeating the approach and away movement to the fixed jaw plate, Ru is formed on the lower side of these fixed jaw plate and the swing jaw plate the lower side of the swing jaw in order to adjust the outlet clearance of the fracture砕製products, and the toggle block formed attached to the back frame to move to the fixed jaw plate side via the toggle plate, anti-swing jaw side of the back frame A clearance adjusting cylinder for moving the toggle block toward the swing jaw, a wedge operating cylinder for inserting and removing a wedge between the back frame and the toggle block, and one end side of the back frame on the side opposite to the swing jaw. A push plate is brought into contact with the other end Is set, a pair of tension spring that applies tension to the tension rod formed by connecting via the rod coupling pin to the swing jaw, one end of which is pivotally connected to the anti-swing jaw side of the back frame, the pair of tension springs A tension spring compression cylinder that presses the pressure plate on the other end side of the pressure frame through the pressure frame and releases the pressing force; and an anti-swing jaw side of the back frame, the pressure frame approaches the back frame, and A jaw crusher comprising: a guide frame having a guide portion for guiding the reciprocation in a direction away from the guide frame . The jaw crusher according to claim 1, wherein a low friction member made of a detachable resin is provided in the guide portion of the guide frame . The jaw crusher according to claim 1 or 2 , wherein a spring washer is attached to the push plate, and a round bar for pressing the spring washer is provided on the spring washer side of the pressure frame . The jaw crusher according to claim 3 , wherein the contact surface of the round bar of the spring washer is concave .

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