Toggle plate tensioning device for jaw crusher

Abstract

A toggle plate tensioning device for a jaw crusher, comprising a mounting base (1), a hydraulic cylinder (2), a pull rod (3), an elastic assembly (4), and a movable base (5). The mounting base (1) is mounted on a frame (61); the movable base (5) is arranged between the lower portion of a movable jaw (62) and the mounting base (1); the hydraulic cylinder (2) is hingedly connected between the mounting base (1) and the movable base (5); one end of the pull rod (3) is hingedly connected to the lower portion of the movable jaw (62), and the other end of the pull rod (3) extends into an inner cavity of the movable base (5) and is elastically connected to the movable base (5) by means of the elastic assembly (4); and the elastic assembly (4) is configured to continuously apply an elastic acting force to the pull rod (3) in a direction away from the movable jaw (62).

Description

A toggle plate tensioning device for a jaw crusher Technical Field

[0001] This utility model relates to the field of jaw crusher technology, specifically to a toggle plate tensioning device for a jaw crusher. Background Technology

[0002] In current jaw crushers, a linkage mechanism is formed by the moving jaw, an eccentric shaft passing through the center of gravity of the moving jaw, an toggle plate supported at the lower part of the moving jaw, and the frame. During operation, the material is crushed by the swinging motion of the moving jaw, which compresses the material between the moving jaw and the stationary jaw plate. The crushed material is discharged through the crushing gap between the moving jaw and the stationary jaw plate. During operation, the moving jaw is tensioned to the toggle plate, the moving jaw, and the frame by a tie rod installed at the lower part of the toggle plate. Currently, the tie rod is loaded in two ways. One way is that the tie rod is loaded by a spring. One end of the spring is fixed to the jaw crusher frame, and the tie rod passes through the middle of the spring. The other end is locked by a nut installed at the end of the tie rod, which locks the spring acting on the tie rod. The nut moves along the tie rod... The spring is compressed by a moving jaw. Each time the discharge gap between the moving jaw and the stationary jaw plate is adjusted, the nut needs to be loosened, and then the spring is tightened again by locking the nut after adjusting the crushing discharge gap. This is especially difficult when crushing hard materials, as the crushing gap needs to be adjusted frequently. Loosening and locking the spring is difficult and requires a lot of force and special tools. This process is time-consuming and labor-intensive, resulting in high labor costs for maintenance. Another method is to load the connecting rod by a hydraulic cylinder. During the operation of the hydraulic cylinder, the piston is subjected to high-frequency and cyclical repeated extension and retraction. Each extension and retraction of the piston generates a large impact on the inner wall of the cylinder. The piston is prone to friction and impact heat, and the seals are easily damaged, resulting in a short life of hydraulic cylinder, frequent replacement, and high replacement costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a toggle plate tensioning device for a jaw crusher that can reduce the impact on the hydraulic cylinder during production, improve service life, reduce operating costs, eliminate the need for manual tensioning adjustment during the entire crushing gap adjustment process, free up manpower, reduce labor costs, and reduce downtime due to crushing gap adjustment, thereby improving the overall crushing output.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A toggle plate tensioning device for a jaw crusher includes a mounting base, a hydraulic cylinder, a pull rod, an elastic component, and a movable seat. The mounting base is fixedly installed on the frame, and the movable seat is located between the lower part of the moving jaw and the mounting base. At least one hydraulic cylinder is hinged between the mounting base and the movable seat. One end of the pull rod is hinged to the lower part of the moving jaw, and the other end of the pull rod passes through a first through hole on one end of the movable seat and extends into the inner cavity of the movable seat and is elastically connected to the movable seat through the elastic component. The elastic component is used to always apply an elastic force to the pull rod in a direction away from the moving jaw.

[0005] Furthermore, the elastic component includes a stop block, a compression spring, a pressure plate, and at least one nut, which are sequentially sleeved on the pull rod from the moving jaw side to the movable seat side. The stop block is fixedly installed on the pull rod and located on the outside of the movable seat. The outer diameter of the stop block is larger than the inner diameter of the first through hole. The compression spring, pressure plate, and nut are all located in the inner cavity of the movable seat. The pressure plate has a second through hole through which the pull rod can pass. One end of the compression spring abuts against the inner bottom surface of the movable seat, and the other end abuts against the pressure plate. The nut is threadedly connected to the pull rod, and the outer diameter of the nut is larger than the inner diameter of the second through hole.

[0006] Furthermore, one side surface of the pressure plate is fixedly provided with an annular positioning protrusion embedded in the opening at one end of the compression spring, and the inner bottom surface of the movable seat is fixedly provided with an annular positioning seat embedded in the opening at the other end of the compression spring. The annular positioning seat is provided with a third through hole through which the pull rod can pass.

[0007] Furthermore, the tie rod includes a hinge seat and a screw rod. One end of the screw rod is threadedly connected to the hinge seat, and the other end of the screw rod is threadedly connected to a nut. A stop block is provided on the screw rod and abuts against the hinge seat.

[0008] Furthermore, a fourth through hole is provided on the other end of the movable seat.

[0009] Furthermore, the movable seat has a square frame structure and includes a front side plate, a left side plate, a rear side plate and a right side plate that are fixedly connected end to end in sequence. The front side plate, the left side plate, the rear side plate and the right side plate together form an inner cavity.

[0010] Furthermore, there are two hydraulic cylinders symmetrically arranged on the left and right sides outside the movable seat. The tail of the hydraulic cylinder body is hinged to the mounting seat, and the end of the hydraulic cylinder piston rod is hinged to the movable seat.

[0011] Furthermore, the hydraulic cylinder is connected to the hydraulic control system, which includes a first connecting oil circuit, a second connecting oil circuit, a third connecting oil circuit, a fourth connecting oil circuit, a flow divider / combiner valve, and two hydraulic locks. The first connecting oil circuit is equipped with a flow divider / combiner valve and is connected to the first oil port of both hydraulic locks. The second oil ports of the two hydraulic locks are respectively connected to the rod-side ports of the two hydraulic cylinders through corresponding second connecting oil circuits. The rodless-side ports of the two hydraulic cylinders are respectively connected to the third oil ports of the two hydraulic locks through corresponding third connecting oil circuits. The fourth oil ports of both hydraulic locks are connected to the fourth connecting oil circuit.

[0012] Furthermore, a limiting plate is provided below the tail of the hydraulic cylinder body, and the limiting plate is fixedly connected to the mounting base.

[0013] Furthermore, it also includes an anti-sway seat fixedly installed on the frame. The anti-sway seat includes a top plate and two anti-sway plates. The two anti-sway plates are fixedly installed at intervals on the lower end face of the top plate. A movable seat is located between the two anti-sway plates. Baffles are also fixedly installed on the outer surfaces of the left and right sides of the movable seat. There is a gap between the baffle and the anti-sway plate on the corresponding side.

[0014] As described above, the toggle plate tensioning device for a jaw crusher provided by this utility model has the following beneficial effects: Through the setting of the elastic component, during the jaw crusher's production process, the elastic component can be adaptively compressed and released to reset with the swing of the moving jaw, maintaining the tension of the toggle plate. Meanwhile, the pressure inside the hydraulic cylinder remains constant, and the piston inside the hydraulic cylinder only makes slight movements or no movements, which helps reduce the impact of the piston on the cylinder body during production, thereby increasing the service life of the hydraulic cylinder and reducing equipment operating costs. Through the setting of the hydraulic cylinder, during the adjustment of the jaw crusher's crushing gap, by controlling the extension or retraction of the hydraulic cylinder piston rod, the movable seat is moved, and under the linkage of the pull rod and the elastic component, the moving jaw swings accordingly, thus quickly realizing the subsequent adjustment of the toggle plate and the adjustment of the crushing gap. During the entire crushing gap adjustment process, manual tensioning adjustment is unnecessary, freeing up manpower and reducing labor costs. It also reduces downtime due to crushing gap adjustment, which is beneficial for increasing overall crushing output. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural schematic diagram of the toggle plate tensioning device of a jaw crusher according to the present invention.

[0016] Figure 2 is a schematic diagram of the toggle plate tensioning device of a jaw crusher according to the present invention.

[0017] Figure 3 is a three-dimensional structural diagram of the movable seat.

[0018] Figure 4 is a schematic diagram of the control principle of the hydraulic cylinder.

[0019] Figure 5 is a schematic diagram of the toggle plate tensioning device of a jaw crusher according to the present invention in use.

[0020] In the diagram: 1-Mounting base; 2-Hydraulic cylinder; 3-Pull rod; 31-Hinged seat; 32-Screw; 4-Elastic component; 41-Stop; 42-Compression spring; 43-Pressure plate; 431-Annular positioning protrusion; 44-Nut; 5-Moving seat; 51-Front side plate; 511-First through hole; 52-Left side plate; 53-Rear side plate; 531-Fourth through hole; 54-Right side plate; 55-Annular positioning seat; 551-Third through hole; 56-Baffle; 61-Frame; 62-Moving jaw; 71-First connecting oil circuit; 72-Second connecting oil circuit; 73-Third connecting oil circuit; 74-Fourth connecting oil circuit; 75-Diverter valve; 76-Hydraulic lock; 8-Limit plate; 9-Anti-sway seat; 91-Top plate; 92-Anti-sway plate. Detailed Implementation

[0021] The present invention will be further described below through specific embodiments.

[0022] As shown in Figures 1 to 5, the toggle plate tensioning device for a jaw crusher according to this utility model includes a mounting base 1, a hydraulic cylinder 2, a pull rod 3, an elastic component 4, and a movable seat 5. The mounting base 1 is fixedly mounted on the frame 61. The movable seat 5 is located between the lower part of the movable jaw 62 and the mounting base 1. At least one hydraulic cylinder 2 is hinged between the mounting base 1 and the movable seat 5. One end of the pull rod 3 is hinged to the lower part of the movable jaw 62. The other end of the pull rod 3 passes through a first through hole 511 on one end of the movable seat 5 and extends into the inner cavity of the movable seat 5. It is elastically connected to the movable seat 5 through the elastic component 4. The elastic component 4 is used to always apply an elastic force to the pull rod 3 in a direction away from the movable jaw 62.

[0023] With the elastic component 4 in place, during the jaw crusher's production process, the elastic component 4 can be adaptively compressed and released to reset as the moving jaw 62 swings, maintaining the tension of the toggle plate. Meanwhile, the pressure inside the hydraulic cylinder 2 remains constant, and the piston inside the hydraulic cylinder 2 moves only slightly or not at all. This helps reduce the impact of the piston on the cylinder body during production, thereby increasing the service life of the hydraulic cylinder 2 and reducing equipment operating costs. Furthermore, with the hydraulic cylinder 2 in place, during the adjustment of the jaw crusher's crushing gap, the extension or retraction of the piston rod of the hydraulic cylinder 2 is controlled to move the movable seat 5. Under the linkage of the pull rod 3 and the elastic component 4, the moving jaw 62 swings accordingly, allowing for rapid adjustment of the toggle plate and the crushing gap. Throughout the entire crushing gap adjustment process, manual tensioning is unnecessary, freeing up manpower and reducing labor costs. It also reduces downtime due to crushing gap adjustments, contributing to increased overall crushing output.

[0024] Correspondingly, a first pin is provided between one end of the pull rod 3 and the lower part of the moving jaw 62 to achieve a hinge connection between the two. In addition, a first cotter pin is inserted at both ends of the first pin to prevent the first pin from falling off.

[0025] Correspondingly, the elastic component 4 includes a stop block 41, a compression spring 42, a pressure plate 43, and at least one nut 44, which are sequentially sleeved on the pull rod 3 from the side of the movable jaw 62 to the side of the movable seat 5. The stop block 41 is fixedly installed on the pull rod 3 and located outside the movable seat 5. The outer diameter of the stop block 41 is larger than the inner diameter of the first through hole 511. The compression spring 42, the pressure plate 43, and the nut 44 are all located in the inner cavity of the movable seat 5. The pressure plate 43 is provided with a second through hole through which the pull rod 3 can pass. One end of the compression spring 42 abuts against the inner bottom surface of the movable seat 5 and the other end abuts against the pressure plate 43. The nut 44 is threadedly connected to the pull rod 3. The outer diameter of the nut 44 is larger than the inner diameter of the second through hole. In this way, the compression spring 42 can always apply an elastic force to the pull rod 3 in a direction away from the moving jaw 62, and at the same time ensure the stability of the elastic connection between the pull rod 3 and the movable seat 5. In addition, preferably, there are two nuts 44, which can better play the role of preventing loosening.

[0026] Preferably, the compression spring 42 is a metal spring or an elastic element made of rubber.

[0027] In addition, an annular positioning protrusion 431 is fixedly provided on one side surface of the pressure plate 43 and embedded in the opening at one end of the compression spring 42. An annular positioning seat 55 is fixedly provided on the inner bottom surface of the movable seat 5 and embedded in the opening at the other end of the compression spring 42. The annular positioning seat 55 is provided with a third through hole 551 through which the pull rod 3 can pass. In this way, the compression spring 42 can be positioned accordingly and the stability of the compression spring 42 during installation can be effectively ensured.

[0028] The pull rod 3 includes a hinge seat 31 and a screw 32. One end of the screw 32 is threadedly connected to the hinge seat 31, and the other end of the screw 32 is threadedly connected to the nut 44. The stop block 41 is disposed on the screw 32 and abuts against the hinge seat 31. Correspondingly, the outer diameter of the hinge seat 31 is larger than the outer diameter of the screw 32. One end of the hinge seat 31 is provided with a threaded hole. One end of the screw 32 has a first external thread section on its outer surface that is threaded with the threaded hole. The other end of the screw 32 has a second external thread section on its outer surface that is threaded with the nut 44. In other embodiments, the hinge seat 31 and the screw 32 are fixedly connected and integrally formed. In addition, the outer circumferential surface of the stop block 41 is provided with a groove. The stop block 41 is fitted onto the screw 32 through the groove and locked onto the screw 32 by fasteners.

[0029] Furthermore, when the tension of the hydraulic cylinder 2 on the movable seat 5 is less than or equal to the elastic force of the compression spring 42, the stop block 41 abuts against the hinge seat 31 and the movable seat 5 simultaneously. When the tension of the hydraulic cylinder 2 on the movable seat 5 is greater than the elastic force of the compression spring 42, the stop block 41 contacts the hinge seat 31 and separates from the mounting seat 1. During the production process of the jaw crusher, only the compression spring 42 is periodically compressed and released and reset as the moving jaw 62 swings, while the mounting seat 1 and the stop block 41 are always separated and do not contact each other.

[0030] In addition, a fourth through hole 531 is provided on the other end of the movable seat 5, and the inner diameter of the fourth through hole 531 is larger than the outer diameter of the screw 32.

[0031] Preferably, there are two hydraulic cylinders 2 symmetrically arranged on the left and right sides of the movable seat 5. The tail of the cylinder body of the hydraulic cylinder 2 is hinged to the mounting base 1, and the piston rod end of the hydraulic cylinder 2 is hinged to the movable seat 5. Correspondingly, a second pin is provided between the tail of the cylinder body of the hydraulic cylinder 2 and the mounting base 1 to realize the hinge between the two. In addition, second cotter pins are inserted at both ends of the second pin to prevent the second pin from falling off. Third pins are fixed on both the left and right sides of the movable seat 5. The piston rod end is sleeved on the corresponding third pin to achieve a hinge connection between them. Furthermore, a fixing plate is installed on the outer end of the third pin to prevent the piston rod end of the hydraulic cylinder 2 from detaching from the third pin. Additionally, the hydraulic cylinder 2 is connected to a hydraulic control system, which includes a first connecting oil passage 71, a second connecting oil passage 72, a third connecting oil passage 73, a fourth connecting oil passage 74, a flow divider / combiner valve 75, and two hydraulic locks 76. The flow divider / combiner valve 75 is installed on the first connecting oil passage 71. The hydraulic lock 75 is connected to the first oil port of each of the two hydraulic locks 76. The second oil ports of the two hydraulic locks 76 are connected to the rod-side oil ports of the two hydraulic cylinders 2 via the corresponding second connecting oil passages 72. The rodless-side oil ports of the two hydraulic cylinders 2 are connected to the third oil ports of the two hydraulic locks 76 via the corresponding third connecting oil passages 73. The fourth oil ports of the two hydraulic locks 76 are connected to the fourth connecting oil passages 74. Thus, the hydraulic oil can be evenly distributed into the rod-side chambers of the two hydraulic cylinders 2 through the diversion and collection valve 75, ensuring that the two hydraulic cylinders 2 retract synchronously, thereby achieving a balance of force on the left and right sides of the mounting base 1. The two hydraulic locks 76 facilitate pressure holding for the two hydraulic cylinders 2. In this way, during the jaw crusher production process, the piston of the hydraulic cylinder 2 can move only slightly or not at all, reducing the impact of the piston on the cylinder body during production, thereby increasing the service life of the hydraulic cylinder 2 and reducing the operating cost of the equipment.

[0032] In addition, a limiting plate 8 is provided below the tail of the cylinder body of the hydraulic cylinder 2. The limiting plate 8 is fixedly connected to the mounting base 1. When the hydraulic cylinder 2 pushes the movable seat 5 forward to push the moving jaw 62 forward, the limiting plate 8 can prevent the hydraulic cylinder 2 from falling downward.

[0033] In addition, the toggle plate tensioning device also includes an anti-sway seat 9 fixedly installed on the frame 61. The anti-sway seat 9 includes a top plate 91 and two anti-sway plates 92. The two anti-sway plates 92 are fixedly disposed at intervals on the lower end face of the top plate 91. The movable seat 5 is disposed between the two anti-sway plates 92. Baffles 56 are also fixedly provided on the outer surfaces of the left and right sides of the movable seat 5. There is a gap between the baffles 56 and the anti-sway plate 92 on the corresponding side. Thus, the anti-sway seat 9 can play a corresponding anti-sway limiting role to prevent the movable seat 5 from swinging significantly to the left and right sides during the operation of the jaw crusher, effectively ensuring the normal use of the hydraulic cylinders 2 located on the left and right sides of the movable seat 5.

[0034] Correspondingly, the movable seat 5 has a square frame structure and includes a front side plate 51, a left side plate 52, a rear side plate 53, and a right side plate 54 that are fixedly connected end to end in sequence. The front side plate 51, the left side plate 52, the rear side plate 53, and the right side plate 54 enclose the inner cavity. Correspondingly, the first through hole 511 is provided on the front side plate 51, the fourth through hole 531 is provided on the rear side plate 53, the annular positioning seat 55 is fixedly provided on the inner side of the front side plate 51, and the two baffles 56 are respectively fixedly provided on the outer side of the left side plate 52 and the right side plate 54.

[0035] The above are only some specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A toggle plate tensioning device for a jaw crusher, characterized in that: The assembly includes a mounting base, a hydraulic cylinder, a pull rod, an elastic component, and a movable seat. The mounting base is fixedly mounted on the frame. The movable seat is located between the lower part of the movable jaw and the mounting base. At least one hydraulic cylinder is hinged between the mounting base and the movable seat. One end of the pull rod is hinged to the lower part of the movable jaw, and the other end of the pull rod passes through a first through hole on one end of the movable seat and extends into the inner cavity of the movable seat, and is elastically connected to the movable seat through the elastic component. The elastic component is used to always apply an elastic force to the pull rod in a direction away from the movable jaw.

2. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: The elastic component includes a stop block, a compression spring, a pressure plate, and at least one nut, which are sequentially sleeved on the pull rod from the moving jaw side to the movable seat side. The stop block is fixedly installed on the pull rod and located outside the movable seat. The outer diameter of the stop block is larger than the inner diameter of the first through hole. The compression spring, the pressure plate, and the nut are all located in the inner cavity of the movable seat. The pressure plate has a second through hole through which the pull rod can pass. One end of the compression spring abuts against the inner bottom surface of the movable seat, and the other end abuts against the pressure plate. The nut is threaded to the pull rod, and the outer diameter of the nut is larger than the inner diameter of the second through hole.

3. The toggle plate tensioning device for a jaw crusher according to claim 2, characterized in that: One side surface of the pressure plate is fixedly provided with an annular positioning protrusion embedded in the opening at one end of the compression spring, and the inner bottom surface of the movable seat is fixedly provided with an annular positioning seat embedded in the opening at the other end of the compression spring. The annular positioning seat is provided with a third through hole through which the pull rod can pass.

4. The toggle plate tensioning device for a jaw crusher according to claim 2, characterized in that: The pull rod includes a hinge seat and a screw. One end of the screw is threaded to the hinge seat, and the other end of the screw is threaded to the nut. The stop block is provided on the screw and abuts against the hinge seat.

5. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: The other end of the movable seat is provided with a fourth through hole.

6. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: The movable seat has a square frame structure and includes a front side plate, a left side plate, a rear side plate and a right side plate that are fixedly connected end to end in sequence. The front side plate, the left side plate, the rear side plate and the right side plate together form the inner cavity.

7. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: The hydraulic cylinders are two in number and symmetrically arranged on the left and right sides outside the movable seat. The tail of the cylinder body of the hydraulic cylinder is hinged to the mounting seat, and the end of the piston rod of the hydraulic cylinder is hinged to the movable seat.

8. The toggle plate tensioning device for a jaw crusher according to claim 7, characterized in that: The hydraulic cylinder is connected to a hydraulic control system, which includes a first connecting oil circuit, a second connecting oil circuit, a third connecting oil circuit, a fourth connecting oil circuit, a flow divider / combiner valve, and two hydraulic locks. The first connecting oil circuit is equipped with the flow divider / combiner valve and is connected to the first oil ports of both hydraulic locks. The second oil ports of the two hydraulic locks are respectively connected to the rod-side ports of the two hydraulic cylinders through the corresponding second connecting oil circuits. The rodless-side ports of the two hydraulic cylinders are respectively connected to the third oil ports of the two hydraulic locks through the corresponding third connecting oil circuits. The fourth oil ports of both hydraulic locks are connected to the fourth connecting oil circuit.

9. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: A limiting plate is provided below the tail of the cylinder body of the hydraulic cylinder, and the limiting plate is fixedly connected to the mounting base.

10. The toggle plate tensioning device for a jaw crusher according to claim 1, characterized in that: It also includes an anti-sway seat fixedly installed on the frame. The anti-sway seat includes a top plate and two anti-sway plates. The two anti-sway plates are fixedly disposed at intervals on the lower end face of the top plate. The movable seat is disposed between the two anti-sway plates. The outer surfaces of the left and right sides of the movable seat are also fixedly provided with baffles. There is a gap between the baffles and the anti-sway plates on the corresponding side.

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