A jaw crusher tooth plate wear detection device

Abstract

The present application relates to the thickness measurement field, specifically to a kind of jaw crusher tooth plate wear detection device, including fixed frame, both ends of the fixed frame are fixedly installed with pressure ear, the shape of the pressure ear is adapted to the tooth slot of tooth plate, the middle part of the fixed frame is rotatably installed with threaded column, the lower portion of the fixed frame is provided with limit insert frame, the both ends of the limit insert frame are adapted to the installation groove of tooth plate, the upper end of the limit insert frame is fixedly installed with threaded sleeve, the threaded sleeve is screwed on the outer surface of threaded column, the both sides of the threaded sleeve are provided with guide sleeve, the lower end of the guide sleeve is fixed with limit insert frame, the guide sleeve is slidably installed with guide column, the guide column is penetrated out from the upper end of guide sleeve, the guide column is fixedly penetrated in the lower end of fixed frame, the rear end of the fixed frame is provided with thickness measurement piece.The present application facilitates detection, and facilitates thickness measurement, while also facilitating use.

Description

Technical Field

[0001] This invention relates to the field of thickness measurement, specifically to a jaw crusher tooth plate wear detection device. Background Technology

[0002] Jaw crusher tooth plates, also known as jaw plates, are key wear-resistant components in jaw crushers that come into direct contact with materials. To determine whether the wear of the tooth plates has reached the replacement standard, it is usually necessary to test the thickness of the tooth convexity. By measuring the thickness parameter of the tooth convexity, the actual wear condition of the tooth plate can be accurately determined.

[0003] However, when existing testing equipment detects the thickness of the teeth on a toothed plate, the toothed plate must first be transferred to the testing table of the testing equipment before the equipment can be started for testing. Since the toothed plate is quite heavy, transferring the toothed plate for testing is quite cumbersome, which makes the testing process inconvenient. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention provides the following technical solution: a jaw crusher tooth plate wear detection device, comprising a fixed frame, with pressure ears fixedly installed at both ends of the fixed frame, the shape of the pressure ears being adapted to the tooth groove of the tooth plate, a threaded column being rotatably installed through the middle of the fixed frame, a limit bracket being provided below the fixed frame, the two ends of the limit bracket being adapted to the mounting groove of the tooth plate, a threaded sleeve being fixedly installed at the upper end of the limit bracket, the threaded sleeve being screwed onto the outer surface of the threaded column, guide sleeves being provided on both sides of the threaded sleeve, the lower end of the guide sleeve being fixed to the limit bracket, a guide post being slidably installed inside the guide sleeve, the guide post passing through the upper end of the guide sleeve and being fixedly installed through the lower end of the fixed frame, and a thickness measuring element being provided at the rear end of the fixed frame.

[0006] Preferably, the thickness measuring component includes a groove guide frame, one end of which is slidably mounted with an open column shell, which is fixed to a fixed frame. A detection slide is slidably mounted on the outer surface of the groove guide frame. A drawing board is fixedly mounted on the upper end of the groove guide frame, and the drawing board is located above the detection slide. Synchronizing columns are elastically mounted through both ends of the detection slide. A roller seat is fixedly mounted between the lower ends of the two synchronous columns. A detection roller is mounted on the lower end of the roller seat. A pen is fixedly mounted on the upper end of one of the synchronous columns. The tip of the pen is in contact with one side of the drawing board. Multiple measuring scale lines are linearly arrayed on one side of the drawing board, and a reference line is provided in the middle of one side of the drawing board.

[0007] Preferably, a compression spring is wound around the outer side of the synchronizing column, the lower end of the compression spring is fixed to the roller seat, the upper end of the compression spring is fixed to the detection slide, and a limit cap is coaxially fixedly installed on the outer surface of the synchronizing column, the limit cap being located above the detection slide.

[0008] Preferably, the upper end face of the open column shell is provided with a plurality of positioning holes in a linear array. The spacing between the plurality of positioning holes is adapted to the spacing between the plurality of protruding teeth on the toothed plate. A positioning pin is inserted through the interior of one of the positioning holes. The positioning pin is inserted through the upper end of the slot guide. A second magnet is fixedly installed on the outer surface of the positioning pin. The second magnet is attracted to the open column shell.

[0009] Preferably, the rear end of the detection slide extends to a wheel frame, and an axle is rotatably mounted through the end of the wheel frame. A gear is coaxially fixedly mounted at the end of the axle. A rack is fixedly mounted at the lower end of the slot guide, and the gear meshes with the rack. A stand extends from the upper end of the detection slide, and the stand is located on the other side of the drawing board. A connecting shaft is rotatably mounted in the middle of the side of the stand, and the connecting shaft is connected to the wheel axle.

[0010] Preferably, a swing shaft is rotatably mounted through the end of the upright frame, one end of the swing shaft extends into a groove, a connecting frame is rotatably mounted at the end of the groove, a swing ear is rotatably mounted at the end of the connecting frame, the end of the swing ear is fixed to the connecting shaft, and a swing seat is fixedly mounted at the other end of the swing shaft.

[0011] Preferably, control frames are slidably mounted through both ends of the base, and erasers are fixedly mounted at the lower ends of the two control frames. The two erasers are located in front of and behind the paintbrush, respectively, with one eraser attached to one side of the drawing board. Two magnets are symmetrically fixedly mounted on the horizontal section of the control frame, with one of the magnets attracting the base.

[0012] Preferably, a push column is fixedly installed at the rear end of the upright frame, a small pulley is coaxially fixedly installed on the outer surface of the connecting shaft, a large pulley is coaxially fixedly installed on the outer surface of the axle, and a synchronous belt connects the large pulley and the small pulley.

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

[0014] 1. Insert the limiting bracket into the mounting slot on the toothed plate, then rotate the threaded column to move the pressure ear on the fixing bracket downward using the thread between the threaded column and the threaded sleeve. This causes the pressure ear to press into the tooth groove on the toothed plate. Through the engagement of the pressure ear, the limiting bracket, and the tooth groove and mounting slot on the toothed plate, the thickness measuring component is fixed to the toothed plate. This allows for on-site measurement of the thickness of the tooth protrusions on the toothed plate, thereby identifying the degree of wear. The process does not require moving the toothed plate, effectively facilitating the inspection.

[0015] 2. Once fixed, the compression spring deforms to press the detection roller onto the protruding teeth of the toothed plate. Simultaneously, the tip of the pen aligns with the reference line on the drawing board. Then, the pusher can be moved to slide the detection slide on the guide rail, thereby driving the detection roller to move along the protruding teeth of the toothed plate. At the same time, the pen and the detection roller move synchronously to draw the upper contour line of the protruding teeth on the drawing board. Then, observe the distance between the curved part of the contour line and the reference line, and use the measuring scale to measure the actual value. In this way, the thickness parameter of the protruding teeth can be intuitively obtained. The process is simple to operate and effectively facilitates thickness measurement.

[0016] 3. After the outline is drawn on the drawing board, press the eraser in front of the pen's forward direction to make it contact the drawing board, and pull up the eraser behind the pen's forward direction to separate it from the drawing board. When the pen moves forward to draw the upper outline of the next tooth, the gear will roll on the rack, causing the axle to rotate, which in turn drives the swing ear on the connecting shaft to rotate, thus driving the connecting frame to push the slot seat, allowing the swing seat on the swing shaft to rotate back and forth, which in turn drives the eraser to swing back and forth, continuously wiping the drawing board to erase the upper outline of the previous tooth drawn on the drawing board, so as to avoid affecting the display of the upper outline of the next tooth. The process can automatically erase the upper outline of the previous tooth when measuring the next tooth, without the need for manual erasure, thus effectively facilitating the use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the fixing frame of the present invention;

[0019] Figure 3 This is a schematic diagram of the detection roller of the present invention;

[0020] Figure 4 This is a schematic diagram of the positioning pin of the present invention;

[0021] Figure 5 This is a schematic diagram of the support frame of the present invention;

[0022] Figure 6 This is a view showing the use of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of A in the middle;

[0024] Figure 8 This is a schematic diagram of the toothed plate of the present invention.

[0025] The components represented by each number in the attached diagram are listed below: 1. Fixing frame; 2. Open column housing; 3. Limiting insert; 4. Detection roller; 5. Groove guide; 6. Drawing board; 7. Roller seat; 8. Compression spring; 9. Synchronizing column; 10. Limiting cap; 11. Drawing pen; 12. Measuring scale line; 13. Eraser; 14. Control frame; 15. Magnet No. 1; 16. Detection slide; 17. Positioning pin; 18. Swing seat; 19. Magnet No. 2; 20. Positioning hole; 21. Gear; 22. Large pulley; 23. Axle; 24. Wheel frame; 25. Synchronous belt; 26. Rack; 27. Connecting shaft; 28. Small pulley; 29. ​​Swing lug; 30. Stand; 31. Push column; 32. Swing shaft; 33. Slot seat; 34. Connecting frame; 35. Threaded column; 36. Guide column; 37. Threaded sleeve; 38. Guide sleeve; 39. Pressure lug; 40. Mounting slot; 41. Gear plate; 42. Reference line. Detailed Implementation

[0026] 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.

[0027] This invention provides a technical solution: such as Figures 1-8The jaw crusher tooth plate wear detection device shown includes a fixed frame 1. Both ends of the fixed frame 1 are fixedly installed with pressure ears 39. The shape of the pressure ears 39 is adapted to the tooth grooves of the tooth plate 41, allowing the pressure ears 39 and the tooth grooves of the tooth plate 41 to engage, thereby improving the stability after fixing. A threaded post 35 is rotatably installed through the middle of the fixed frame 1. A limit insert 3 is provided below the fixed frame 1. Both ends of the limit insert 3 are adapted to the mounting grooves 40 of the tooth plate 41, allowing the limit insert 3 to smoothly insert into the mounting grooves 40 of the tooth plate 41, thereby improving the stability after fixing. A threaded sleeve 37 is fixedly installed at the upper end of the limit insert 3. The threaded sleeve 37 is screwed onto the outer surface of the threaded post 35. The cooperation between the threaded sleeve 37 and the threaded post 35 allows the pressure ears 39 to be pressed into the tooth grooves on the tooth plate 41. Guide sleeves 38 are provided on both sides of the threaded sleeve 37. The lower end of the guide sleeve 38 engages with the limit insert 3. The guide sleeve 38 is fixed, and a guide post 36 is slidably installed inside the guide sleeve 38. The guide post 36 extends from the upper end of the guide sleeve 38 and is fixed to the lower end of the fixed frame 1. The cooperation between the guide sleeve 38 and the guide post 36 guides the fixed frame 1. A thickness measuring element is provided at the rear end of the fixed frame 1. The limiting insert 3 is inserted into the mounting groove 40 on the toothed plate 41. Then, the threaded column 35 is rotated so that the thread between the threaded column 35 and the threaded sleeve 37 drives the pressure ear 39 on the fixed frame 1 to move down, so that the pressure ear 39 is pressed into the tooth groove on the toothed plate 41. In this way, the thickness measuring element is fixed on the toothed plate 41 by the action of the pressure ear 39, the limiting insert 3, the tooth groove on the toothed plate 41, and the mounting groove 40. The thickness of the tooth of the toothed plate 41 can be measured on site, thereby identifying the wear degree of the toothed plate 41. The process does not require the toothed plate 41 to be moved, which effectively facilitates the inspection.

[0028] The thickness measuring component includes a groove guide frame 5. An open column housing 2 is slidably mounted on one end of the groove guide frame 5, serving to guide and support the groove guide frame 5. The open column housing 2 is fixed to the fixing frame 1. A detection slide 16 is slidably mounted on the outer surface of the groove guide frame 5, providing a sliding surface for the detection slide 16. A drawing board 6 is fixedly mounted on the upper end of the groove guide frame 5, positioned above the detection slide 16 to ensure unobstructed movement. Synchronizing columns 9 are elastically mounted through both ends of the detection slide 16. A roller seat 7 is fixedly mounted between the lower ends of the two synchronous columns 9, with a detection roller 4 mounted on the lower end of the roller seat 7, supporting the detection roller 4. A drawing pen 11 is fixedly mounted on the upper end of one of the synchronous columns 9. The pen tip 11 is attached to one side of the drawing board 6. The pen 11 can draw the upper contour line of the toothed plate 41 on the drawing board 6. Multiple measuring scale lines 12 are arranged linearly on one side of the drawing board 6. The measuring scale lines 12 serve as measurement. A reference line 42 is set in the middle of one side of the drawing board 6. The reference line 42 serves as a reference. When the pen tip 11 is aligned with the reference line 42, it means that the toothed plate 41 is in an unworn state. When the detection roller 4 rolls in the wear area of ​​the toothed plate, the pen 11 will move down, causing the drawn contour line to bend downward. At this time, observe the distance between the curved part of the contour line and the reference line 42, and use the measuring scale lines 12 to measure the actual value. In this way, the thickness parameter of the toothed plate can be obtained intuitively, thereby identifying the wear degree of the toothed plate.

[0029] A compression spring 8 is wound around the outside of the synchronizing column 9. The lower end of the compression spring 8 is fixed to the roller seat 7, and the upper end of the compression spring 8 is fixed to the detection slide 16. The compression spring 8 can press the detection roller 4 onto the protruding teeth of the toothed plate 41, so that the detection roller 4 always rolls along the upper end of the protruding teeth. A limit cap 10 is coaxially fixedly installed on the outer surface of the synchronizing column 9. The limit cap 10 is located above the detection slide 16. The limit cap 10 plays the role of preventing the synchronizing column 9 and the detection slide 16 from separating.

[0030] The upper end face of the open column shell 2 is linearly arrayed with multiple positioning holes 20. The spacing between the multiple positioning holes 20 is adapted to the spacing between multiple protrusions on the toothed plate 41. After the slot guide frame 5 is adjusted and positioned according to the positioning holes 20, the detection roller 4 can be detected to be exactly at the protrusion on the toothed plate 41. A positioning pin 17 is inserted through the interior of one of the positioning holes 20. The positioning pin 17 is inserted through the upper end of the slot guide frame 5 and serves to fix the slot guide frame 5. A second magnet 19 is fixedly installed on the outer surface of the positioning pin 17. The second magnet 19 is attracted to the open column shell 2 and serves to fix the positioning pin 17.

[0031] The rear end of the detection slide 16 extends to a wheel frame 24, and a wheel axle 23 is rotatably mounted through the end of the wheel frame 24. The wheel frame 24 serves to support the wheel axle 23. A gear 21 is coaxially fixedly mounted at the end of the wheel axle 23. A rack 26 is fixedly mounted at the lower end of the slot guide frame 5. The gear 21 meshes with the rack 26. The cooperation between the gear 21 and the rack 26 drives the wheel axle 23 to rotate. A stand 30 extends from the upper end of the detection slide 16. The stand 30 is located on the other side of the drawing board 6 and serves to support the wheel. A connecting shaft 27 is rotatably mounted in the middle of the side of the stand 30. The connecting shaft 27 is connected to the wheel axle 23.

[0032] A swing shaft 32 is rotatably mounted through the end of the upright frame 30. One end of the swing shaft 32 extends into a slot 33. A connecting frame 34 is rotatably mounted at the end of the slot 33. The connecting frame 34 can push the slot 33, thereby causing the swing shaft 32 to reciprocate. A swing ear 29 is rotatably mounted at the end of the connecting frame 34. The end of the swing ear 29 is fixed to the connecting shaft 27. The connecting shaft 27 can drive the swing ear 29 to rotate, thereby driving the connecting frame 34 to move. A swing seat 18 is fixedly mounted at the other end of the swing shaft 32.

[0033] Control frames 14 are slidably mounted through both ends of the base 18. Erasers 13 are fixedly mounted on the lower ends of both control frames 14. The control frames 14 support the erasers 13, which erase the outlines on the drawing board 6. The two erasers 13 are located in front of and behind the brush 11, with one eraser 13 fitting against one side of the drawing board 6. Two magnets 15 are symmetrically fixedly mounted on the horizontal section of the control frames 14. One magnet 15 is attracted to the base 18, fixing the eraser 13 after it has moved. After an outline is drawn on the drawing board 6, the eraser 13 located in front of the brush 11 can be pressed to contact the drawing board 6, and the brush 11 can be moved forward... The eraser 13 is pulled up to separate it from the drawing board 6. When the pen 11 moves forward to draw the upper outline of the next tooth, the gear 21 rolls on the rack 26, causing the axle 23 to rotate. This, in turn, drives the swing ear 29 on the connecting shaft 27 to rotate, thereby driving the connecting frame 34 to push the slot seat 33. This allows the swing seat 18 on the swing shaft 32 to rotate back and forth, which in turn drives the eraser 13 to swing back and forth, continuously wiping the drawing board 6 to erase the upper outline of the previous tooth drawn on the drawing board 6, thus avoiding affecting the display of the upper outline of the next tooth. The process can automatically erase the upper outline of the previous tooth when measuring the next tooth, without the need for manual erasure, which effectively facilitates the use.

[0034] A push column 31 is fixedly installed at the rear end of the stand 30. The push column 31 facilitates the pushing for thickness measurement. A small pulley 28 is coaxially fixedly installed on the outer surface of the connecting shaft 27. A large pulley 22 is coaxially fixedly installed on the outer surface of the wheel axle 23. The cooperation between the large pulley 22 and the small pulley 28 can accelerate the oscillation frequency of the eraser 13 to ensure that the outline is fully erased. A synchronous belt 25 is connected between the large pulley 22 and the small pulley 28. The synchronous belt 25 connects the connecting shaft 27 and the wheel axle 23 together.

[0035] During testing, the limiting insert 3 is inserted into the mounting groove 40 on the toothed plate 41. Then, the threaded column 35 is rotated, and the thread between the threaded column 35 and the threaded sleeve 37 drives the pressure ear 39 on the fixing frame 1 to move downward, so that the pressure ear 39 is pressed into the tooth groove on the toothed plate 41. In this way, the thickness measuring component is fixed on the toothed plate 41 by the action of the pressure ear 39, the limiting insert 3, and the tooth groove and mounting groove 40 on the toothed plate 41. At this time, the compression spring 8 deforms to press the detection roller 4 onto the protruding teeth of the toothed plate 41, and at the same time, the pen... The pen tip 11 corresponds to the reference line 42 on the drawing board 6. Then, the pusher 31 can be moved to make the detection slide 16 slide on the guide rail 5, thereby driving the detection roller 4 to move along the protruding teeth of the toothed plate 41. At the same time, the pen 11 moves synchronously with the detection roller 4 to draw the upper contour line of the protruding teeth on the drawing board 6. Then, the distance between the curved part of the contour line and the reference line 42 is observed, and the actual value is measured using the measuring scale line 12. In this way, the thickness parameter of the protruding teeth can be obtained intuitively, thereby identifying the wear of the protruding teeth. To assess the degree of damage, the positioning pin 17 can be pulled out to adjust the position of the guide rail 5, causing the detection roller 4 to press onto the next tooth of the toothed plate 41. Then, the eraser 13 located in front of the pen 11 in the forward direction is pressed down to contact the drawing board 6, and the eraser 13 located behind the pen 11 in the forward direction is pulled up to separate it from the drawing board 6. Next, the pusher 31 is reversed, causing the pen 11 to advance and draw the upper contour line of the next tooth. During this process, the gear 21 rolls on the rack 26, causing the axle 23 to rotate. The swing lug 29 on the connecting shaft 27 rotates, which drives the connecting frame 34 to push the slot seat 33, allowing the swing seat 18 on the swing shaft 32 to rotate back and forth, thereby driving the eraser 13 to swing back and forth, continuously wiping the drawing board 6 to erase the upper contour line of the previous tooth drawn on the drawing board 6, so as to avoid affecting the display of the upper contour line of the next tooth. Then, the thickness value can be measured by observing the upper contour line of the next tooth to identify the degree of wear. This process is repeated to detect the wear condition of the tooth plate 41.

[0036] 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.

[0037] 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 tooth plate wear detection device, comprising a fixing frame (1), characterized in that: Both ends of the fixed frame (1) are fixedly installed with pressure ears (39). The shape of the pressure ears (39) is adapted to the tooth groove of the tooth plate. A threaded column (35) is rotatably installed through the middle of the fixed frame (1). A limit bracket (3) is provided below the fixed frame (1). Both ends of the limit bracket (3) are adapted to the mounting groove of the tooth plate. A threaded sleeve (37) is fixedly installed at the upper end of the limit bracket (3). The threaded sleeve (37) is screwed onto the outer surface of the threaded column (35). Guide sleeves (38) are provided on both sides of the threaded sleeve (37). The lower end of the guide sleeve (38) is fixed to the limit bracket (3). A guide post (36) is slidably installed inside the guide sleeve (38). The guide post (36) extends through the upper end of the guide sleeve (38). The guide post (36) is fixed through the lower end of the fixed frame (1). A thickness measuring component is provided at the rear end of the fixed frame (1). The thickness measuring component includes a groove guide frame (5), one end of which is slidably mounted with an open column shell (2), which is fixed to a fixed frame (1). A detection slide (16) is slidably mounted on the outer surface of the groove guide frame (5). A drawing board (6) is fixedly mounted on the upper end of the groove guide frame (5). The drawing board (6) is located above the detection slide (16). Both ends of the detection slide (16) are elastically mounted with synchronous columns (9). A roller seat (7) is fixedly mounted between the lower ends of the two synchronous columns (9). A detection roller (4) is mounted on the lower end of the roller seat (7). A pen (11) is fixedly mounted on the upper end of one of the synchronous columns (9). The tip of the pen (11) is attached to one side of the drawing board (6). Multiple measurement scale lines (12) are linearly arrayed on one side of the drawing board (6). A reference line (42) is set in the middle of one side of the drawing board (6). The rear end of the detection slide (16) extends to a wheel frame (24), and a wheel axle (23) is rotatably mounted through the end of the wheel frame (24). A gear (21) is coaxially fixedly mounted at the end of the wheel axle (23). A rack (26) is fixedly mounted at the lower end of the slot guide frame (5). The gear (21) meshes with the rack (26). A stand (30) extends from the upper end of the detection slide (16). The stand (30) is located on the other side of the drawing board (6). A connecting shaft (27) is rotatably mounted in the middle of the side of the stand (30). The connecting shaft (27) is connected to the wheel axle (23). A swing shaft (32) is rotatably mounted through the end of the upright frame (30). One end of the swing shaft (32) extends into a slot seat (33). A connecting frame (34) is rotatably mounted at the end of the slot seat (33). A swing ear (29) is rotatably mounted at the end of the connecting frame (34). The end of the swing ear (29) is fixed to the connecting shaft (27). A swing seat (18) is fixedly mounted at the other end of the swing shaft (32). Both ends of the base (18) are slidably mounted with control frames (14), and the lower ends of the two control frames (14) are fixedly mounted with erasers (13). The two erasers (13) are located in front of and behind the paintbrush (11), and one of the erasers (13) is attached to one side of the drawing board (6). Two magnets (15) are symmetrically fixedly mounted on the horizontal section of the control frame (14), and one of the magnets (15) is attracted to the base (18).

2. The jaw crusher tooth plate wear detection device according to claim 1, characterized in that: A compression spring (8) is wound around the outside of the synchronizing column (9). The lower end of the compression spring (8) is fixed to the roller seat (7), and the upper end of the compression spring (8) is fixed to the detection slide (16). A limit cap (10) is coaxially fixed on the outer surface of the synchronizing column (9). The limit cap (10) is located above the detection slide (16).

3. The jaw crusher tooth plate wear detection device according to claim 2, characterized in that: The upper end face of the open column shell (2) is provided with a linear array of multiple positioning holes (20). The spacing between the multiple positioning holes (20) is adapted to the spacing between the multiple protruding teeth on the tooth plate. A positioning pin (17) is inserted through the interior of one of the positioning holes (20). The positioning pin (17) is inserted through the upper end of the slot guide frame (5). A second magnet (19) is fixedly installed on the outer surface of the positioning pin (17). The second magnet (19) is attracted to the open column shell (2).

4. The jaw crusher tooth plate wear detection device according to claim 1, characterized in that: A push column (31) is fixedly installed at the rear end of the upright frame (30), a small pulley (28) is fixedly installed coaxially on the outer surface of the connecting shaft (27), a large pulley (22) is fixedly installed coaxially on the outer surface of the wheel axle (23), and a synchronous belt (25) is connected between the large pulley (22) and the small pulley (28).

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