A wear resistance testing device for jaw crusher liners

Abstract

This invention relates to the field of wear resistance testing, specifically to a wear resistance testing device for jaw crusher liners. The device includes a testing platform, a front upright fixedly mounted on the upper front of the testing platform, and a rear upright fixedly mounted on the upper rear of the testing platform. A bearing shaft is fixedly mounted through the front and rear uprights. A swing frame is rotatably mounted on the outer surface of the bearing shaft. A testing plate is fixedly mounted at the front end of the swing frame. A ring frame is rotatably mounted on the outer surface of the bearing shaft behind the swing frame. A reset element is provided between the ring frame and the testing platform. A control toothed ring is fixedly mounted at the end of the ring frame. This invention can simulate the wear force of an arc-shaped jaw plate under normal working conditions, effectively improving the accuracy of wear resistance testing, ensuring that the arc-shaped jaw plate does not shift during testing, and ensuring that the movement of the testing plate is not obstructed by the pressure tooth lugs.

Description

Technical Field

[0001] This invention relates to the field of wear resistance testing, specifically to a wear resistance testing device for jaw crusher liners. Background Technology

[0002] A jaw crusher is a machine that uses a motor-driven eccentric shaft to rotate a movable jaw plate in a reciprocating motion. The periodic opening and closing of the movable and fixed jaw plates applies a compressive force to materials such as ores and rocks entering the crushing chamber, thus achieving material crushing. The wear resistance of the jaw crusher's upper liner directly affects its lifespan; therefore, wear resistance testing of jaw crusher liners, such as the arc-shaped jaw plates, is crucial.

[0003] However, existing testing devices for curved jaw plates can only perform a single friction and wear test. In actual working conditions, curved jaw plates are subjected to continuous friction from materials such as ores, as well as impact loads generated during material descent. Therefore, relying solely on friction testing cannot fully simulate the wear force of curved jaw plates under real working conditions, resulting in inaccurate test results. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a wear resistance detection device for jaw crusher liners.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a jaw crusher liner wear resistance detection device, comprising a detection platform, a front upright fixedly installed at the upper front of the detection platform, a rear upright fixedly installed at the upper rear of the detection platform, a bearing shaft fixedly installed through the front and rear uprights, a swing frame rotatably installed on the outer surface of the bearing shaft, a detection plate fixedly installed at the front end of the swing frame, a ring frame rotatably installed on the outer surface of the bearing shaft behind the swing frame, a reset component provided between the ring frame and the detection platform, a control gear ring fixedly installed at the end of the ring frame, lugs extending from both ends of the control gear ring, a control gear meshing at the middle of the upper end of the control gear ring, a connecting shaft fixedly installed through the middle of the control gear, the connecting shaft rotatably connected to the rear upright, a push lug fixedly installed at the end of the connecting shaft, an impact frame slidably installed at the end of the rear upright, a pressure frame connected between the impact frame and the push lug, and a fixing plate provided at the upper end of the front upright.

[0006] Preferably, the upper end of the pressure frame is rotatably connected to the end of the push ear, a Y-shaped seat is fixedly installed at the middle of the upper end of the impact frame, the lower end of the pressure frame is rotatably connected to the end of the Y-shaped seat, a guide rod extends from the upper corner of the impact frame, and the rear stand is slidably installed on the outer surface of the guide rod.

[0007] Preferably, a support is fixedly installed at the upper end of the testing platform near the edge, a servo motor is fixedly installed at the upper end of the support, a pusher is fixedly installed at the output end of the servo motor, a connecting frame is rotatably connected to the end of the pusher, and the end of the connecting frame is rotatably connected to the swing frame.

[0008] Preferably, the reset component includes two fixing frames located on both sides of the ring frame. The lower ends of the two fixing frames are fixed to the testing platform. An outer carrier shell is connected to the upper edge of the opposite surface of the two fixing frames. An inner carrier rod is coaxially and elastically installed inside the outer carrier shell. The inner carrier rod extends through one end of the outer carrier shell and is connected to the ring frame at one end.

[0009] Preferably, a rod cap is coaxially fixedly installed at the other end of the inner load rod, the rod cap is slidably installed inside the outer load shell, and a balancing spring is fixedly installed on the inner bottom surface of the outer load shell, with the end of the balancing spring fixed to the rod cap.

[0010] Preferably, there are connecting seats extending from the upper edges of both sides of the ring frame and the opposite surfaces of the two fixed frames. The connecting seats on the ring frame are rotatably connected to one end of the inner load rod, and the connecting seats on the fixed frames are rotatably connected to the other end of the outer load shell.

[0011] Preferably, the fixed plate includes an arc-shaped support fixedly installed on the upper end of the front stand. The arc of the arc-shaped support matches the arc of the arc-shaped jaw plate. The center of the arc-shaped support coincides with the center of the bearing shaft. Limiting plates are elastically installed through both ends of the arc-shaped support. The distance between the two limiting plates matches the length of the arc-shaped jaw plate. Multiple pressure teeth extend linearly from the upper edge of the opposite surfaces of the two limiting plates. The distance between the multiple pressure teeth matches the distance between the multiple protruding teeth on the arc-shaped jaw plate. The slope of the inclined side of the pressure teeth matches the slope of the inclined side of the protruding teeth on the arc-shaped jaw plate. Pressing posts are elastically installed through both sides of the front end of the arc-shaped support. The pressing posts are inserted into the insertion holes at the front end of the limiting plates.

[0012] Preferably, both sides of the front upright have extending brackets, and the ends of the extending brackets are equipped with return springs. The ends of the return springs are fixed to the lower ends of the limiting carrier plate. A fixed plate sleeve is slidably installed on the outer surface of the pressing column. The end of the fixed plate sleeve is fixed to the arc-shaped support. A convex ring extends coaxially from the outer surface of the pressing column. The convex ring is slidably installed inside the fixed plate sleeve. A top-closing spring is wound around the outer side of the pressing column. The two ends of the top-closing spring are fixed to the front end of the convex ring and the inner front end of the fixed plate sleeve, respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The swing frame drives the detection plate to swing left and right in an arc, continuously rubbing against the broken surface of the arc-shaped jaw plate. Simultaneously, as the swing frame approaches its endpoints on both sides, the detection plate disengages from the top of the arc-shaped jaw plate, and the swing frame contacts the lugs on the control gear ring. The swing frame then continues to swing to its end point, pushing the lugs and causing the control gear ring to rotate around the bearing shaft. This rotation of the control gear drives the push lugs on the connecting shaft to rotate, which in turn drives the impact frame downwards via the pressure frame, impacting the broken surface of the arc-shaped jaw plate. This process repeats, simulating the wear force of the arc-shaped jaw plate under normal working conditions by simultaneously driving the swing frame to rub against the arc-shaped jaw plate and the impact frame to impact it. This improves the accuracy of wear resistance testing.

[0015] 2. Place the arc-shaped jaw plate on the arc-shaped support. At this time, the two limiting plates are respectively attached to the two ends of the arc-shaped jaw plate. Then press the limiting plates downward so that the pressure lugs on the limiting plates are positioned between the protruding teeth of the arc-shaped jaw plate. At the same time, the inclined edge of the pressure lugs presses against the inclined edge of the protruding teeth. At this time, the insertion hole at the front end of the limiting plate is aligned with the pressing post. Under the push of the top spring, the pressing post can be inserted into the insertion hole at the front end of the limiting plate, thus fixing the downward-moving limiting plate and keeping the pressure lugs pressed against the arc-shaped jaw plate. This firmly fixes the arc-shaped jaw plate on the arc-shaped support, ensuring that the arc-shaped jaw plate will not shift during the testing process. At the same time, the fixing design of the pressure lugs and the protruding teeth ensures that the movement of the testing plate is not obstructed by the pressure lugs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a rear view of the present invention;

[0018] Figure 3 This is a schematic diagram of the connecting shaft of the present invention;

[0019] Figure 4 This is an internal view of the outer casing of the present invention;

[0020] Figure 5 This is a cross-sectional view showing the connection between the arc-shaped support and the limiting carrier plate of the present invention;

[0021] Figure 6 This is a view showing the use of the present invention;

[0022] Figure 7 This is a fixed view of the arcuate jaw plate of the present invention;

[0023] Figure 8 This is a schematic diagram of the arc-shaped jaw plate of the present invention.

[0024] The components represented by each number in the attached diagram are listed below: 1. Testing platform; 2. Front stand; 3. Bearing shaft; 4. Rear stand; 5. Control gear ring; 6. Lug; 7. Impact frame; 8. Swing frame; 9. Testing plate; 10. Arc-shaped support; 11. Return spring; 12. Extension frame; 13. Limiting plate; 14. Pressing lug; 15. Servo motor; 16. Guide rod; 17. Fixing frame; 18. Outer housing; 19. Alignment spring; 20. Rod cap; 21. Inner support rod; 22. Ring frame; 23. Fixed plate sleeve; 24. Top closing spring; 25. Pressing column; 26. Convex ring; 27. Connecting shaft; 28. Control gear; 29. ​​Push lug; 30. Pressing frame; 31. Y-shaped seat; 32. Push frame; 33. Connecting frame; 34. Support; 35. Connecting seat; 36. Arc-shaped jaw plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides a technical solution: such as Figures 1-8The device shown is a jaw crusher liner wear resistance testing device, including a testing platform 1. A front upright 2 is fixedly installed at the upper front of the testing platform 1, and a rear upright 4 is fixedly installed at the upper rear of the testing platform 1. Both the front upright 2 and the rear upright 4 serve a load-bearing function. A bearing shaft 3 is fixedly installed through the front upright 2 and the rear upright 4. A swing frame 8 is rotatably installed on the outer surface of the bearing shaft 3. The bearing shaft 3 serves to allow the swing frame 8 to rotate. A testing plate 9 is fixedly installed at the front end of the swing frame 8. The swing frame 8 can drive the testing plate 9 to swing left and right in an arc. The crushing surface of the arc-shaped jaw plate 36 is continuously rubbed. A ring frame 22 is rotatably mounted on the outer surface of the bearing shaft 3 behind the swing frame 8. A reset component is provided between the ring frame 22 and the detection platform 1. A control gear ring 5 is fixedly mounted at the end of the ring frame 22. The ring frame 22 serves to allow the control gear ring 5 to rotate around the bearing shaft 3. Both ends of the control gear ring 5 have lugs 6, which are actuated by the swing frame 8. A control gear 28 meshes with the upper middle part of the control gear ring 5. A connecting shaft is fixedly mounted through the middle of the control gear 28. 27. The connecting shaft 27 is rotatably connected to the rear support frame 4, and the connecting shaft 27 serves as a connection. A push lug 29 is fixedly installed at the end of the connecting shaft 27, and an impact frame 7 is slidably installed at the end of the rear support frame 4. A pressure frame 30 is connected between the impact frame 7 and the push lug 29. When the swing frame 8 is about to swing to the end point on both sides, the detection plate 9 just disengages from above the arc-shaped jaw plate 36, and the swing frame 8 contacts the lever lug 6 on the control gear ring 5. Then the swing frame 8 continues to swing to the end point of the stroke. During this process, the swing frame 8 will push the lever lug 6, thereby driving... The control gear ring 5 rotates around the bearing shaft 3, allowing the control gear 28 to rotate, thereby driving the push lug 29 on the connecting shaft 27 to rotate. This causes the impact frame 7 to move downwards via the pressure frame 30, impacting the broken surface of the arc-shaped jaw plate 36. This process repeats, so that while the swing frame 8 swings and drives the detection plate 9 to rub against the arc-shaped jaw plate 36, the impact frame 7 simultaneously impacts the arc-shaped jaw plate 36. This simulates the wear force of the arc-shaped jaw plate 36 under normal working conditions, improving the accuracy of wear resistance testing. A fixed plate is provided at the upper end of the front upright 2.

[0027] The upper end of the pressure frame 30 is rotatably connected to the end of the push lug 29. A Y-shaped seat 31 is fixedly installed in the middle of the upper end of the impact frame 7. The lower end of the pressure frame 30 is rotatably connected to the end of the Y-shaped seat 31. The Y-shaped seat 31 facilitates the connection of the pressure frame 30 and the impact frame 7 together. A guide rod 16 extends from the upper corner of the impact frame 7. The rear stand 4 is slidably installed on the outer surface of the guide rod 16. The guide rod 16 guides the impact frame 7.

[0028] A support 34 is fixedly installed at the upper end of the testing platform 1 near the edge. A servo motor 15 is fixedly installed at the upper end of the support 34. The support 34 serves to support the servo motor 15. A push frame 32 is fixedly installed at the output end of the servo motor 15. A connecting frame 33 is rotatably connected to the end of the push frame 32. The end of the connecting frame 33 is rotatably connected to the swing frame 8. The servo motor 15 drives the push frame 32 to rotate, so that the swing frame 8 swings around the bearing shaft 3 as the center through the connecting frame 33.

[0029] The reset component includes two fixing frames 17, which are located on both sides of the ring frame 22. The lower ends of the two fixing frames 17 are fixed to the testing platform 1. An outer housing 18 is connected to the upper edge of the opposite surface of the two fixing frames 17. The fixing frames 17 serve to support the outer housing 18. An inner support rod 21 is coaxially and elastically installed inside the outer housing 18. The outer housing 18 serves to bear the load of the inner support rod 21. The inner support rod 21 extends out from one end of the outer housing 18 and is connected to the ring frame 22.

[0030] The other end of the inner load rod 21 is coaxially fixedly mounted with a rod cap 20. The rod cap 20 is slidably mounted inside the outer load shell 18. A balance spring 19 is fixedly mounted on the inner bottom surface of the outer load shell 18. The balance spring 19 can use its own elastic force to push the inner load rod 21, thereby pushing the rotated ring frame 22 to return the ring frame 22 to a vertical state, thereby driving the impact frame 7 to move upward and return to its original position after impact. The end of the balance spring 19 is fixed to the rod cap 20, and the rod cap 20 serves to connect the balance spring 19.

[0031] Connecting seats 35 extend from the upper edges of the opposite surfaces of the ring frame 22 and the two fixed frames 17. The connecting seats 35 on the ring frame 22 are rotatably connected to one end of the inner load rod 21, and the connecting seats 35 on the fixed frames 17 are rotatably connected to the other end of the outer shell 18. The connecting seats 35 can facilitate the connection of the ring frame 22 and the inner load rod 21, the fixed frames 17 and the outer shell 18 together.

[0032] The fixed plate component includes an arc-shaped support 10 fixedly installed on the upper end of the front upright 2. The curvature of the arc-shaped support 10 is adapted to the curvature of the arc-shaped jaw plate 36, ensuring that the arc-shaped jaw plate 36 is fully fitted on the arc-shaped support 10 for support. The center of the arc-shaped support 10 coincides with the center of the bearing shaft 3, ensuring that the center of the arc-shaped jaw plate 36 and the center of the bearing shaft 3 coincide after the arc-shaped jaw plate 36 is placed on the arc-shaped support 10, thus ensuring subsequent... When the swing frame 8 drives the detection plate 9 to swing left and right in an arc, the detection plate 9 can always be in contact with the arc-shaped jaw plate 36. Both ends of the arc-shaped support 10 are elastically installed with limiting plates 13. The distance between the two limiting plates 13 is adapted to the length of the arc-shaped jaw plate 36, so that the two limiting plates 13 can respectively fit against the two ends of the arc-shaped jaw plate 36, so that the arc-shaped jaw plate 36 will not shift left and right. The upper edges of the opposite surfaces of the two limiting plates 13 are linear. The array extends with multiple pressure ears 14. The spacing between the multiple pressure ears 14 is adapted to the spacing between the multiple protrusions on the arc-shaped jaw plate 36, ensuring that the multiple pressure ears 14 enter between the multiple protrusions. The slope of the inclined side of the pressure ears 14 is adapted to the slope of the inclined side of the protrusion on the arc-shaped jaw plate 36, ensuring that the inclined side of the pressure ears 14 presses against the inclined side of the protrusion, so as to press the arc-shaped jaw plate 36 tightly onto the arc-shaped support 10 and prevent it from shifting back and forth. The fixed design of the pressure ears 14 and the protrusions can ensure that the movement of the detection plate 9 is not obstructed by the pressure ears 14, and at the same time, it allows the detection plate 9 to smoothly rotate away from the top of the arc-shaped jaw plate 36, so as to facilitate the picking and putting of the arc-shaped jaw plate 36. Pressing posts 25 are elastically installed through both sides of the front end of the arc-shaped support 10. The pressing posts 25 are inserted through the insertion holes at the front end of the limiting carrier plate 13, and the pressing posts 25 serve to fix the limiting carrier plate 13.

[0033] Both sides of the front upright 2 have extending brackets 12, and the ends of the extending brackets 12 are equipped with return springs 11. The extending brackets 12 serve to support the return springs 11. The ends of the return springs 11 are fixed to the lower end of the limiting plate 13. When not fixed, the return springs 11 will push up the limiting plate 13 to facilitate the placement of the arc-shaped jaw plate 36, which is not interfered with by the pressure teeth 14 on the limiting plate 13. The outer surface of the pressing column 25 is slidably equipped with a fixing plate sleeve 23, and the end of the fixing plate sleeve 23 is... The part is fixed to the arc-shaped support 10. The fixed plate sleeve 23 serves to support the pressing column 25. A convex ring 26 extends coaxially from the outer surface of the pressing column 25. The convex ring 26 is slidably installed inside the fixed plate sleeve 23. A top-closing spring 24 is wound around the outside of the pressing column 25. The two ends of the top-closing spring 24 are fixed to the front end of the convex ring 26 and the front end of the inner side of the fixed plate sleeve 23, respectively. The top-closing spring 24 can push the convex ring 26 so that the pressing column 25 is inserted into the insertion hole at the front end of the limiting carrier plate 13.

[0034] During testing, the arc-shaped jaw plate 36 is placed on the arc-shaped support 10. At this time, the two limiting plates 13 are respectively attached to the two ends of the arc-shaped jaw plate 36. Then, the limiting plates 13 are pressed down so that the pressure lugs 14 on the limiting plates 13 can be positioned between the protruding teeth of the arc-shaped jaw plate 36. At the same time, the inclined edge of the pressure lugs 14 presses against the inclined edge of the protruding teeth. At this time, the insertion hole at the front end of the limiting plates 13 is just aligned with the pressing post 25, so that the pressing post 25 is pushed by the top spring 24. The downward movement allows the plate to be inserted into the socket at the front end of the limiting plate 13, fixing the downward-moving limiting plate 13. This keeps the pressure ear 14 pressed against the arc-shaped jaw plate 36, firmly fixing the arc-shaped jaw plate 36 onto the arc-shaped support 10. Subsequently, the servo motor 15 drives the pusher 32 to rotate, which in turn drives the swing frame 8 to swing around the bearing shaft 3 via the connecting frame 33. The swinging swing frame 8 then drives the detection plate 9 to continuously break the arc-shaped jaw plate 36. The surface is rubbed together, and when the swing frame 8 is about to swing to the end point on both sides, the detection plate 9 just disengages from above the arc-shaped jaw plate 36, and the swing frame 8 contacts the lug 6 on the control gear ring 5. Then the swing frame 8 continues to swing to the end point of the stroke. During this process, the swing frame 8 pushes the lug 6, which in turn drives the control gear ring 5 to rotate around the bearing shaft 3, allowing the control gear 28 to rotate, thereby driving the push lug 29 on the connecting shaft 27 to rotate, so that the impact frame 7 moves down through the pressure frame 30 to impact the broken surface of the arc-shaped jaw plate 36. This process is repeated, so that while the swing frame 8 swings and drives the detection plate 9 to rub against the arc-shaped jaw plate 36, the impact frame 7 is simultaneously driven to impact the arc-shaped jaw plate 36. This simulates the wear force of the arc-shaped jaw plate 36 under normal working conditions. After the test, the wear resistance performance can be identified by observing whether there is deformation, cracks, etc. on the appearance of the arc-shaped jaw plate 36.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jaw crusher liner wear detection device comprising a detection platform (1), characterised in that: The upper end front of the detection platform (1) is fixedly installed with a front stand (2), the upper end rear of the detection platform (1) is fixedly installed with a rear stand (4), a bearing shaft (3) is fixedly installed between the front stand (2) and the rear stand (4), a swing frame (8) is rotatably installed on the outer surface of the bearing shaft (3), a detection plate (9) is fixedly installed on the front end of the swing frame (8), a ring frame (22) is rotatably installed on the outer surface of the bearing shaft (3) behind the swing frame (8), a reset member is arranged between the ring frame (22) and the detection platform (1), a control gear ring (5) is fixedly installed on the end of the ring frame (22), the two ends of the control gear ring (5) extend with a pull ear (6), the upper end middle part of the control gear ring (5) is engaged with a control gear (28), the middle part of the control gear (28) is fixedly installed with a connecting shaft (27), the connecting shaft (27) is rotatably connected with the rear stand (4), the end of the connecting shaft (27) is fixedly installed with a push ear (29), the end of the rear stand (4) is slidably installed with a impact frame (7), the impact frame (7) is connected with a pressing frame (30) between the push ear (29), and the upper end of the front stand (2) is provided with a fixing plate member.

2. A jaw crusher liner wear detection device according to claim 1, characterised in that: The upper end of the pressing frame (30) is rotatably connected with the end of the push ear (29), the upper end middle part of the impact frame (7) is fixedly installed with a Y-shaped seat (31), the lower end of the pressing frame (30) is rotatably connected with the end of the Y-shaped seat (31), the upper end corner of the impact frame (7) extends with a guide rod (16), and the rear stand (4) is slidably installed on the outer surface of the guide rod (16).

3. A jaw crusher liner wear detection device according to claim 1, characterised in that: The upper end of the detection platform (1) is fixedly installed with a support (34) near the edge, the upper end of the support (34) is fixedly installed with a servo motor (15), the output end of the servo motor (15) is fixedly installed with a push frame (32), the end of the push frame (32) is rotatably connected with a connecting frame (33), and the end of the connecting frame (33) is rotatably connected with the swing frame (8).

4. A jaw crusher liner wear detection device according to claim 1, characterised in that: The reset member comprises two fixed frames (17), the two fixed frames (17) are located on the two sides of the ring frame (22), the lower ends of the two fixed frames (17) are fixed with the detection platform (1), the upper edges of the opposite surfaces of the two fixed frames (17) are connected with outer load shells (18), the inner parts of the outer load shells (18) are coaxially and elastically installed with inner load rods (21), the inner load rods (21) pass through one end of the outer load shell (18), and one end of the inner load rod (21) is connected with the ring frame (22).

5. A jaw crusher liner wear detection device according to claim 4, characterised in that: The other end of the inner load rod (21) is coaxially and fixedly installed with a rod cap (20), the rod cap (20) is slidably installed in the inner part of the outer load shell (18), the inner bottom surface of the outer load shell (18) is fixedly installed with a righting spring (19), and the end of the righting spring (19) is fixed with the rod cap (20).

6. A jaw crusher liner wear detection device according to claim 4, characterised in that: The two sides of the ring frame (22) and the opposite surface edges of the two fixing frames (17) are extended with sockets (35), the socket (35) on the ring frame (22) is rotationally connected with one end of the inner carrier rod (21), and the socket (35) on the fixing frame (17) is rotationally connected with the other end of the outer carrier shell (18).

7. A jaw crusher liner wear detection device according to claim 1, characterised in that: The fixed plate member comprises an arc-shaped bracket (10) fixedly installed at the upper end of the front stand (2), the arc of the arc-shaped bracket (10) is matched with the arc of the arc-shaped jaw plate, the center of the arc-shaped bracket (10) is coincided with the center of the bearing shaft (3), the two ends of the arc-shaped bracket (10) are penetrated by elastically installed limiting carrier plates (13), the spacing between the two limiting carrier plates (13) is matched with the length of the arc-shaped jaw plate, a plurality of pressure tooth ears (14) are linearly arrayed at the upper edges of the opposite surfaces of the two limiting carrier plates (13), the spacing between the plurality of pressure tooth ears (14) is matched with the spacing between the plurality of protruding teeth on the arc-shaped jaw plate, the slope of the pressure tooth ear (14) is matched with the slope of the slope of the protruding teeth on the arc-shaped jaw plate, and the front end of the arc-shaped bracket (10) is elastically installed with a pressing column (25) at the two side edges of the front end of the arc-shaped bracket (10).

8. A jaw crusher liner wear detection device according to claim 7, characterised in that: The two sides of the front stand (2) are extended with extension frames (12), the end of the extension frame (12) is installed with a return spring (11), the end of the return spring (11) is fixed with the lower end of the limiting carrier plate (13), the outer surface of the pressing column (25) is slidably installed with a fixed plate sleeve (23), the end of the fixed plate sleeve (23) is fixed with the arc-shaped bracket (10), the outer surface of the pressing column (25) is coaxially extended with a convex ring (26), the convex ring (26) is slidably installed in the inside of the fixed plate sleeve (23), and the outer side of the pressing column (25) is wound with a top spring (24), the two ends of the top spring (24) are respectively fixed with the front end of the convex ring (26) and the front end of the inside of the fixed plate sleeve (23).

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