Crusher tool bit device convenient to switch and crusher

Abstract

The utility model relates to the technical field of mechanical engineering and manufacturing, and discloses a crusher tool bit device convenient to switch and a crusher, the crusher tool bit device convenient to switch comprises a tool bit assembly and a tool bit fixing assembly, the tool bit fixing assembly is provided with a base and a pressing structure. According to the device, the disassembly and replacement steps of the tool bit are simplified, the material of the tool bit is improved, and the effects that the non-stop time in a single period is prolonged and the tool is rapidly replaced when the tool is stopped are achieved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical engineering and manufacturing technology, and in particular to a conveniently switchable crusher cutter head device and a crusher. Background Art

[0002] With the development of science and technology, human mechanical manufacturing has greatly improved. Crusher is inevitably used to crush materials in various industries. Crusher is used as a crushing device in the feed industry, construction cement industry, solid waste treatment industry and other industries. It is used to break materials from large blocks into smaller particles that we require, making the materials easier to reuse or transport. In the existing technology, the waste clothing industry crusher relies on a motor to drive the blade holder, which in turn drives the cutter head to shear the incoming material into small pieces for the next processing step. However, the existing cutter head structure and materials lead to severe wear after a short period of use, requiring shutdown to change the blade, resulting in long production line downtime and costly waste. Summary of the Invention

[0003] In order to overcome the technical problems in the prior art mentioned in the background technology, in which the cutter head structure and materials result in severe wear of the cutter head in a short period of use, and the need to stop the machine to change the cutter, resulting in long-term production line shutdown and cost waste, the utility model provides a crusher cutter head device and crusher that can be easily switched, so as to increase the number of uses, reduce the cutter change time, and extend the service life.

[0004] The specific technical solutions of the utility model are as follows:

[0005] A conveniently switchable cutter head device for a crusher comprises: a cutter head assembly comprising a fixed cutter seat and a detachable multi-faceted cutter head arranged on the top of the fixed cutter seat; a bearing groove is arranged at the bottom of the fixed cutter seat;

[0006] The cutter head fixing assembly located at the bottom of the fixed cutter seat includes a base and a clamping structure; the base is provided with a slide groove running through its top and bottom, and the clamping structure includes a locking mechanism, a tensioning spring and a bearing mechanism connected end to end from bottom to top; the locking mechanism runs through the lower part of the slide groove, the tensioning spring is located in the slide groove, and the bearing mechanism is installed in the bearing groove.

[0007] The design of the detachable multi-faceted cutter head can ensure that multiple cutter faces can be installed in the machine at one time, reducing the frequency of frequent shutdowns to switch cutter heads, while increasing the number of shearing times, saving the frequency of tool changes, and increasing work efficiency; the cutter head assembly is split into a fixed cutter holder and a detachable multi-faceted cutter head, which reduces the number of parts that need to be replaced, reduces the difficulty of operation, and speeds up the operation. The cutter head fixing assembly fixes the cutter head in the set position to ensure that the cutter head position is controllable. The cutter head assembly is detachable as a whole. At the same time, the parts that need to be replaced and the parts that do not need to be replaced are cut, which reduces the difficulty of cutter head disassembly and speeds up cutter head replacement, thereby extending the service life of the knife assembly and reducing replacement frequency.

[0008] Preferably, the fixed blade holder and the detachable multi-faceted blade head are connected by screws, so that the fixed blade holder can be reused by replacing the blade head assembly.

[0009] Preferably, any of the detachable multi-faceted cutter heads is a quadrangular diamond cutter head. Diamond has high wear resistance and hardness, which extends the service life of the cutter head.

[0010] Preferably, the material of the fixed tool holder is hardened steel, which has greatly improved strength and hardness compared to ordinary steel, has a large cutting force, and improves the operating speed.

[0011] Preferably, the fixed knife holder can be reused to reduce production costs.

[0012] Preferably, the detachable multi-faceted cutter head has four sides, and the angle of each side is 90 degrees, which extends the service life of the device.

[0013] The bearing mechanism includes a bearing, a bearing stud and an embedded nut; the bottom of the bearing stud is connected to the top of the tension spring, the outer periphery of the embedded nut is fixed to the inner ring of the bearing, and the inner periphery of the embedded nut is threadedly connected to the stud, thereby reducing the difficulty of tool changing and alleviating the work intensity of workers.

[0014] The locking mechanism includes a clamping stud and a clamping nut. The clamping stud is threadedly connected to the clamping nut, and the clamping nut is connected to the lower part of the tension spring to ensure that the process channel of the upper pulling cutter head assembly is unobstructed.

[0015] Preferably, the normal state of the tension spring is a stretched state, so that after the cutter head assembly is pulled up, the spring automatically returns to its original position.

[0016] The chute is a hexagonal chute, which is compatible with the compression nut. The nut is generally a hexagonal structure, which is convenient for normal operation.

[0017] The clamping stud is coaxial with the bearing stud, ensuring that the clamping spring remains in a vertical state during operation, thereby minimizing the work intensity of workers when switching the cutter heads.

[0018] Preferably, the diameters of the clamping stud and the bearing stud are the same, ensuring that the forces of the tensioning spring are on the same straight line, thereby reducing the operating intensity.

[0019] A positioning pin hole is provided at the bottom of the fixed knife seat, and a positioning pin corresponding to the positioning pin hole is provided at the top of the base. The positioning hole and the positioning pin correspond to each other, thereby speeding up the knife changing speed of the worker.

[0020] The positioning pin hole is centrally symmetrical, thereby increasing the balance of the portable and switchable crusher cutter head device.

[0021] Preferably, there are four positioning holes to reduce the probability of error when switching the cutter head.

[0022] The clamping stud is fixed with a connecting bolt at one end away from the cutter head assembly, and the diameter of the bolt is larger than the diameter of the slide slot, which facilitates fixing the portable switchable crusher cutter head device on the cutter frame to prevent it from moving and affecting the operation.

[0023] The bolt is connected to the bottom end of the chute to fix the entire portable switchable crusher cutter head.

[0024] Preferably, the bolts and studs are fixed by threads to facilitate disassembly.

[0025] A crusher, characterized by a conveniently switchable crusher head device,

[0026] lathe frame;

[0027] A driving mechanism mounted on a lathe frame;

[0028] a cutter shaft connected to the drive mechanism;

[0029] A tool holder mounted on a lathe frame, the tool holder being connected to a tool shaft;

[0030] A crusher cutter head assembly is mounted on the cutter frame and the cutter shaft.

[0031] Preferably, there are two driving mechanisms, which are axially symmetrically distributed on the lathe frame to increase the balance of the operation.

[0032] The invention provides a crusher with a conveniently switchable crusher cutter head device, so as to increase the number of uses, reduce the cutter change time and extend the service life.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. The cutter head assembly is fixed to a bearing and connected to a tension spring, which plays a role in quick tool change and saves the time of single tool change.

[0035] 2. The cutter head assembly is split into a fixed cutter holder and a detachable multi-faceted cutter head, so that the fixed cutter holder can be reused, saving resources and reducing production costs.

[0036] 3. The detachable multi-faceted cutter head is made of diamond raw material. Diamond has the characteristics of wear resistance and high hardness, which can well increase the number of shearing times and extend the service life.

[0037] 4. The design of the positioning pin and positioning pin hole saves the time wasted by angle control during manual tool change, and plays a role in quick tool change. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of a crusher of the present utility model.

[0039] Figure 2 It is a top view of the crusher of the present utility model.

[0040] Figure 3 It is a schematic diagram of the conveniently switchable crusher cutter head device of the utility model.

[0041] Figure 4 It is a structural schematic diagram of the cutter head assembly of the utility model.

[0042] Figure 5 It is a cross-sectional view of the conveniently switchable crusher cutter head device of the utility model.

[0043] Figure 6 It is a working schematic diagram of the conveniently switchable crusher cutter head device of the utility model.

[0044] The accompanying drawings are marked as follows: 1. lathe frame; 2. driving mechanism; 3. machine cover; 4. screen; 5. tool holder; 6. tool shaft; 7. tool head assembly; 8. tool head fixing assembly; 9. fixed tool holder; 10. detachable multi-faceted tool head; 11 connecting bolt; 12. base; 13. clamping structure; 14. fixing nut; 15 tensioning spring; 16. clamping stud; 17. clamping nut; 18 bearing mechanism; 19. bearing; 20. inlaid nut; 21. bearing stud; 22. slide; 23. positioning pin; 24. positioning pin hole; 25. bearing groove DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the following embodiments. Unless otherwise specified, the devices, connection structures and methods involved in the present invention are all well known in the art.

[0046] Example 1

[0047] like Figure 1 As shown, a crusher includes a lathe frame 1, a machine cover 3 installed around the lathe frame 1 and a screen 4 located at the bottom of the lathe frame.

[0048] like Figure 2 As shown, the above-mentioned crusher also includes a cutter shaft 6 fixed on two centrally symmetrical driving mechanisms and a cutter frame 5 with left and right ends respectively fixed to the two cutter shafts, and a conveniently switched crusher cutter head device is located on the cutter frame 5.

[0049] like Figure 3 As shown, the portable switchable crusher cutter head device includes a cutter head fixing assembly 8 located at the bottom of the device and a cutter head assembly connected to the cutter head fixing assembly 8 . The portable switchable crusher cutter head device is fixed to the cutter holder 5 via a fixing nut 14 .

[0050] like Figure 4As shown, there is a bearing groove 25 at the center of the bottom of the cutter head assembly 7, and four positioning pin holes 24 are centrally symmetrically provided on the bottom of the cutter head assembly 7, distributed on the four corners of the cutter head assembly.

[0051] Specifically, the cross section of the cutter head assembly is square.

[0052] like Figure 5 As shown, a hexagonal chute 22 is hollowed out in the center of the base 12. The bottom of the chute 22 runs through the lower part of the base 12. A tension spring 15 is located inside the chute. The underside of the tension spring 15 is welded to a compression nut 17. The compression nut 17 is threadedly connected to a compression stud 16. The compression stud 16 extends from the bottom of the chute 22 and secures the conveniently switchable crusher cutter head device to the cutter holder 5 via a fixing nut 14. A bearing stud 21 is welded above the tension spring 15. The bearing stud 21 is threadedly connected to an insert nut 20. The outer side of the insert nut 20 is fixed to a bearing 19, which is installed in a bearing groove 25.

[0053] Specifically, the fixed blade holder 10 and the detachable multi-faceted blade head 9 are connected and fixed by connecting bolts 11 .

[0054] Specifically, the detachable multi-faceted cutter head 10 is a quadrangular diamond cutter head.

[0055] Specifically, the normal state of the tension spring 15 is a tension state.

[0056] Specifically, the fixed blade holder 10 is detachable.

[0057] Specifically, the material of the fixed blade seat is hardened steel.

[0058] like Figure 6 As shown, a positioning pin 23 is installed on the top of the base 12, and the position and size of the positioning pin 23 and the positioning pin hole 24 are adapted.

[0059] The working principle of the portable switchable crusher cutter head device of this utility model is as follows:

[0060] When a cutter head of the crusher has been used for a long time and the diamond becomes blunt and needs to be replaced, turn off the crusher switch and manually lift the cutter head assembly 7 until the positioning pin hole 24 is completely separated from the positioning pin 23. At this time, the internal tensioning spring 15 continues to stretch, driving the lower clamping nut 17 to move upward, and the cutter head assembly 7 drives the internal bearing 19 to rotate 90 degrees clockwise. After the positioning pin hole 24 and the positioning pin 23 correspond one by one, the cutter head assembly 7 is lowered, the internal tensioning spring 15 contracts, driving the cutter head assembly 7 to descend, and the positioning pin 23 is put back into the positioning pin hole 24 to complete the quick cutter change. After that, the crusher is turned on and continued to be used.

[0061] When the four detachable multi-faceted cutter heads 10 in the portable switchable crusher cutter head device become blunt, the crusher is shut down, the cutter head assembly 7 is disassembled, and a new cutter head assembly 7 is installed, and then the crusher is turned on and used again. In the disassembled cutter head assembly 7, the detachable multi-faceted cutter head 10 is removed from the fixed cutter seat 9, and the fixed cutter seat 9 can be reinstalled with a new detachable multi-faceted cutter head 7 for further reuse. The disassembled detachable multi-faceted cutter head 7 can be recycled for other uses, saving resources, achieving the effect of quick cutter change, and saving cutter change time.

[0062] Example 2

[0063] A crusher comprises a lathe frame 1, a machine cover 3 installed around the lathe frame 1 and a screen 4 located at the bottom of the lathe frame.

[0064] The crusher further comprises a cutter shaft 6 fixed on two centrally symmetrical drive mechanisms and a cutter frame 5 with left and right ends respectively fixed to the two cutter shafts. A conveniently switchable crusher cutter head device is located on the cutter frame 5.

[0065] The portable switchable crusher cutter head device comprises a cutter head fixing assembly 8 located at the bottom of the device and a cutter head assembly connected to the cutter head fixing assembly 8 . The portable switchable crusher cutter head device is fixed to the cutter holder 5 via a fixing nut 14 .

[0066] A bearing groove 25 is provided at the center of the bottom of the cutter head assembly 7. Four positioning pin holes 24 are centrally symmetrically provided on the bottom of the cutter head assembly 7 and are distributed at the four corners of the cutter head assembly.

[0067] Specifically, the cross section of the cutter head assembly is square.

[0068] A hexagonal slot 22 is hollowed out in the center of the base 12. The slot 22 extends through the lower portion of the base 12. A tension spring 15 is located within the slot. A compression nut 17 is welded to the underside of the tension spring 15. The compression nut 17 is threadedly connected to a compression stud 16. The compression stud 16 extends from the underside of the slot 22 and secures the easily switchable crusher cutter head assembly to the cutterhead 5 via a fixing nut 14. A bearing stud 21 is welded above the tension spring 15. The bearing stud 21 is threadedly connected to an insert nut 20. The outer side of the insert nut 20 is secured to a bearing 19, which is mounted in a bearing recess 25.

[0069] Specifically, the fixed tool holder 10 and the detachable multi-faceted tool head 9 are formed into the tool head assembly 7 through high temperature quenching.

[0070] Specifically, the detachable multi-faceted cutter head 10 is a quadrangular diamond cutter head.

[0071] Specifically, the normal state of the tension spring 15 is a tension state.

[0072] Specifically, the fixed blade holder 10 is detachable.

[0073] Specifically, the material of the fixed blade seat is hardened steel.

[0074] A positioning pin 23 is installed on the top of the base 12 , and the position and size of the positioning pin 23 and the positioning pin hole 24 are adapted.

[0075] The working principle of the portable switchable crusher cutter head device of this utility model is as follows:

[0076] When a cutter head of the crusher has been used for a long time and the diamond becomes blunt and needs to be replaced, turn off the crusher switch and manually lift the cutter head assembly 7 until the positioning pin hole 24 is completely separated from the positioning pin 23. At this time, the internal tensioning spring 15 continues to stretch, driving the lower clamping nut 17 to move upward, and the cutter head assembly 7 drives the internal bearing 19 to rotate 90 degrees clockwise. After the positioning pin hole 24 and the positioning pin 23 correspond one by one, the cutter head assembly 7 is lowered, the internal tensioning spring 15 contracts, driving the cutter head assembly 7 to descend, and the positioning pin 23 is put back into the positioning pin hole 24 to complete the quick cutter change. After that, the crusher is turned on and continued to be used.

[0077] When the four detachable multi-faceted cutter heads 10 in the portable switchable crusher cutter head device become blunt, the crusher is shut down, the cutter head assembly 7 is disassembled, and a new cutter head assembly 7 is installed, and then the crusher is turned on and used again. In the disassembled cutter head assembly 7, the detachable multi-faceted cutter head 10 is removed from the fixed cutter seat 9, and the fixed cutter seat 9 can be reinstalled with a new detachable multi-faceted cutter head 7 for further reuse. The disassembled detachable multi-faceted cutter head 7 can be recycled for other uses, saving resources, achieving the effect of quick cutter change, and saving cutter change time.

[0078] Example 3

[0079] A crusher comprises a lathe frame 1, a machine cover 3 installed around the lathe frame 1 and a screen 4 located at the bottom of the lathe frame.

[0080] The crusher further comprises a cutter shaft 6 fixed on two centrally symmetrical drive mechanisms and a cutter frame 5 with left and right ends respectively fixed to the two cutter shafts. A conveniently switchable crusher cutter head device is located on the cutter frame 5.

[0081] The portable switchable crusher cutter head device comprises a cutter head fixing assembly 8 located at the bottom of the device and a cutter head assembly connected to the cutter head fixing assembly 8 . The portable switchable crusher cutter head device is fixed to the cutter holder 5 via a fixing nut 14 .

[0082] A bearing groove 25 is provided at the center of the bottom of the cutter head assembly 7. Four positioning pin holes 24 are centrally symmetrically provided on the bottom of the cutter head assembly 7 and are distributed at the four corners of the cutter head assembly.

[0083] Specifically, the cross section of the cutter head assembly is square.

[0084] A hexagonal slot 22 is hollowed out in the center of the base 12. The slot 22 extends through the lower portion of the base 12. A tension spring 15 is located within the slot. A compression nut 17 is welded to the underside of the tension spring 15. The compression nut 17 is threadedly connected to a compression stud 16. The compression stud 16 extends from the underside of the slot 22 and secures the easily switchable crusher cutter head assembly to the cutterhead 5 via a fixing nut 14. A bearing stud 21 is welded above the tension spring 15. The bearing stud 21 is threadedly connected to an insert nut 20. The outer side of the insert nut 20 is secured to a bearing 19, which is mounted in a bearing recess 25.

[0085] Specifically, the fixed blade holder 10 and the detachable multi-faceted blade head 9 are connected and fixed by connecting bolts 11 .

[0086] Specifically, the detachable multi-faceted cutter head 10 is a quadrangular high-speed steel cutter head.

[0087] Specifically, the normal state of the tension spring 15 is a tension state.

[0088] Specifically, the fixed blade holder 10 is detachable.

[0089] Specifically, the material of the fixed blade seat is hardened steel.

[0090] A positioning pin 23 is installed on the top of the base 12 , and the position and size of the positioning pin 23 and the positioning pin hole 24 are adapted.

[0091] The working principle of the portable switchable crusher cutter head device of this utility model is as follows:

[0092] When a cutter head of the crusher has been used for a long time and the diamond becomes blunt and needs to be replaced, turn off the crusher switch and manually lift the cutter head assembly 7 until the positioning pin hole 24 is completely separated from the positioning pin 23. At this time, the internal tensioning spring 15 continues to stretch, driving the lower clamping nut 17 to move upward, and the cutter head assembly 7 drives the internal bearing 19 to rotate 90 degrees clockwise. After the positioning pin hole 24 and the positioning pin 23 correspond one by one, the cutter head assembly 7 is lowered, the internal tensioning spring 15 contracts, driving the cutter head assembly 7 to descend, and the positioning pin 23 is put back into the positioning pin hole 24 to complete the quick cutter change. After that, the crusher is turned on and continued to be used.

[0093] When the four detachable multi-faceted cutter heads 10 in the portable switchable crusher cutter head device become blunt, the crusher is shut down, the cutter head assembly 7 is disassembled, and a new cutter head assembly 7 is installed, and then the crusher is turned on and used again. In the disassembled cutter head assembly 7, the detachable multi-faceted cutter head 10 is removed from the fixed cutter seat 9, and the fixed cutter seat 9 can be reinstalled with a new detachable multi-faceted cutter head 7 for further reuse. The disassembled detachable multi-faceted cutter head 7 can be recycled for other uses, saving resources, achieving the effect of quick cutter change, and saving cutter change time.

[0094] Example 4

[0095] A crusher comprises a lathe frame 1, a machine cover 3 installed around the lathe frame 1 and a screen 4 located at the bottom of the lathe frame.

[0096] The crusher further comprises a cutter shaft 6 fixed on two centrally symmetrical drive mechanisms and a cutter frame 5 with left and right ends respectively fixed to the two cutter shafts. A conveniently switchable crusher cutter head device is located on the cutter frame 5.

[0097] The portable switchable crusher cutter head device comprises a cutter head fixing assembly 8 located at the bottom of the device and a cutter head assembly connected to the cutter head fixing assembly 8 . The portable switchable crusher cutter head device is fixed to the cutter holder 5 via a fixing nut 14 .

[0098] A bearing groove 25 is provided at the center of the bottom of the cutter head assembly 7. Four positioning pin holes 24 are centrally symmetrically provided on the bottom of the cutter head assembly 7 and are distributed at the four corners of the cutter head assembly.

[0099] Specifically, the cross section of the cutter head assembly is square.

[0100] A hexagonal slot 22 is hollowed out in the center of the base 12. The slot 22 extends through the lower portion of the base 12. A tension spring 15 is located within the slot. A compression nut 17 is welded to the underside of the tension spring 15. The compression nut 17 is threadedly connected to a compression stud 16. The compression stud 16 extends from the underside of the slot 22 and secures the easily switchable crusher cutter head assembly to the cutterhead 5 via a fixing nut 14. A bearing stud 21 is welded above the tension spring 15. The bearing stud 21 is threadedly connected to an insert nut 20. The outer side of the insert nut 20 is secured to a bearing 19, which is mounted in a bearing recess 25.

[0101] Specifically, the fixed blade holder 10 and the detachable multi-faceted blade head 9 are connected and fixed by connecting bolts 11 .

[0102] Specifically, the detachable multi-faceted cutter head 10 is a quadrangular carbide cutter head.

[0103] Specifically, the normal state of the tension spring 15 is a tension state.

[0104] Specifically, the fixed blade holder 10 is detachable.

[0105] Specifically, the material of the fixed blade seat is hardened steel.

[0106] A positioning pin 23 is installed on the top of the base 12 , and the position and size of the positioning pin 23 and the positioning pin hole 24 are adapted.

[0107] The working principle of the portable switchable crusher cutter head device of this utility model is as follows:

[0108] When a cutter head of the crusher has been used for a long time and the diamond becomes blunt and needs to be replaced, turn off the crusher switch and manually lift the cutter head assembly 7 until the positioning pin hole 24 is completely separated from the positioning pin 23. At this time, the internal tensioning spring 15 continues to stretch, driving the lower clamping nut 17 to move upward, and the cutter head assembly 7 drives the internal bearing 19 to rotate 90 degrees clockwise. After the positioning pin hole 24 and the positioning pin 23 correspond one by one, the cutter head assembly 7 is lowered, the internal tensioning spring 15 contracts, driving the cutter head assembly 7 to descend, and the positioning pin 23 is put back into the positioning pin hole 24 to complete the quick cutter change. After that, the crusher is turned on and continued to be used.

[0109] When the four detachable multi-faceted cutter heads 10 in the portable switchable crusher cutter head device become blunt, the crusher is shut down, the cutter head assembly 7 is disassembled, and a new cutter head assembly 7 is installed, and then the crusher is turned on again for use. In the disassembled cutter head assembly 7, the detachable multi-faceted cutter head 10 is removed from the fixed cutter seat 9, and the fixed cutter seat 9 can be reinstalled with a new detachable multi-faceted cutter head 7 for further reuse. The disassembled detachable multi-faceted cutter head 7 will be recycled, saving resources, achieving the effect of quick cutter change, and saving cutter change time.

[0110] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A conveniently switchable crusher head device, characterized in that: include: A cutter head assembly, comprising a fixed cutter seat and a detachable multi-faceted cutter head disposed on top of the fixed cutter seat; A bearing groove is provided at the bottom of the fixed knife seat; The cutter head fixing assembly located at the bottom of the fixed cutter seat includes a base and a clamping structure; the base is provided with a slide groove running through the top and bottom thereof, and the clamping structure includes a locking mechanism, a tensioning spring and a bearing mechanism connected end to end from bottom to top; the locking mechanism runs through the lower part of the slide groove, the tensioning spring is located in the slide groove, and the bearing mechanism is installed in the bearing groove.

2. The conveniently switchable crusher cutter head device according to claim 1 is characterized in that: The bearing mechanism includes a bearing, a bearing stud and an embedded nut; the bottom of the bearing stud is connected to the top of the tension spring, the outer periphery of the embedded nut is fixed to the inner ring of the bearing, and the inner periphery of the embedded nut is threadedly connected to the stud.

3. The conveniently switchable crusher cutter head device according to claim 2 is characterized in that: The locking mechanism includes a compression stud and a compression nut. The compression stud is threadedly connected to the compression nut, and the compression nut is connected to the lower part of the tension spring.

4. The conveniently switchable crusher cutter head device according to claim 3 is characterized in that: The sliding groove is a hexagonal sliding groove, and the sliding groove is adapted to the clamping nut.

5. The conveniently switchable crusher cutter head device according to claim 3 is characterized in that: The clamping stud is coaxial with the bearing stud.

6. The conveniently switchable crusher cutter head device according to claim 1 is characterized in that: A positioning pin hole is provided at the bottom of the fixed knife seat, and a positioning pin corresponding to the positioning pin hole is provided at the top of the base.

7. The conveniently switchable crusher cutter head device according to claim 6, characterized in that: The positioning pin hole is centrally symmetrical about the center of the bottom of the fixed knife seat.

8. The conveniently switchable crusher cutter head device according to claim 5, characterized in that: One end of the compression stud away from the cutter head assembly is fixedly connected to a fixing nut, and the diameter of the fixing nut is larger than the diameter of the slide groove.

9. The conveniently switchable crusher cutter head device according to claim 8, characterized in that: The fixing nut is connected to the bottom end of the sliding groove.

10. A crusher, characterized in that: include: lathe frame; a driving mechanism mounted on the lathe frame; a cutter shaft connected to the drive mechanism; A tool holder mounted on the lathe frame, the tool holder being connected to the tool shaft; A conveniently switchable crusher cutter head device according to any one of claims 1 to 9 is installed on the cutter holder and the cutter shaft.

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