Modularized phenolic moulding plastic production pulverizer

Abstract

The utility model discloses a modularized phenolic moulding plastic production pulverizer which comprises a machine shell, a front end cover is arranged on one side of the machine shell, movable cavities are formed in the top and the bottom of one side of the front end cover, clamping arms are rotationally installed on one sides of inner cavities of the movable cavities, inserting arms matched with the clamping arms are connected to one sides of the inner cavities of the movable cavities in an inserted mode, and the clamping arms are connected with the inserting arms in an inserted mode. According to the multifunctional pulverizer, the structural design of the modularized pulverizer is adopted, so that the pulverizer can flexibly and rapidly switch the functions of the pulverizer according to the actual working requirements in the actual working process, and the purpose that one pulverizer has multiple functions is achieved; corresponding functional parts can be replaced according to actual production requirements, corresponding production work is completed, the performance of the pulverizer is improved, multiple purposes are achieved, the production efficiency of phenolic molding plastic is improved, cost input is reduced, and convenience is provided for work and use of a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to phenolic molding compound production technical field, especially a modular phenolic molding compound production rubbing crusher. BACKGROUND

[0002] In the production and processing of phenolic molding compound, the raw materials need to be crushed, and the traditional rubbing crusher is designed in an integrated structure, mainly composed of a rubbing wheel and a shell body loading materials and the rubbing wheel. Such a structure design is inconvenient to adjust flexibly in actual use, that is, the existing rubbing crusher only has a crushing function, and is limited by the structure. The rubbing wheel is difficult to quickly and flexibly disassemble and replace other production components (such as stirring rods, cutters, etc.) on the machine. This makes the rubbing crusher only complete one kind of production work in use, greatly limiting the working field of the rubbing crusher and the working performance of the rubbing. Different production machines need to be equipped according to different types of work, which increases the production cost.

[0003] In view of the above problems, the utility model is improved. SUMMARY

[0004] The utility model provides a modular phenolic molding compound production rubbing crusher, which solves the above problems in the use of the prior art.

[0005] The technical scheme of the utility model is as follows: a modular phenolic molding compound production rubbing crusher, comprising a shell, a front end cover is arranged on one side of the shell, a movable cavity is formed in the top and the bottom of one side of the front end cover, a clamping arm is rotatably installed on one side of the movable cavity, a plug-in arm matched with the clamping arm is inserted into one side of the movable cavity, one end of the plug-in arm is fixedly connected to the shell, a push block is slidably installed on one side of the movable cavity, two ends of one side of the push block are provided with matching cavities matched with the clamping arm, sliding grooves are formed in the two sides of the matching cavities, sliding blocks are slidably installed in the sliding grooves, one side of the sliding block is movably installed on the clamping arm, one end of the sliding block is fixedly connected with a spring, and the other end of the spring away from the sliding block is fixedly connected to the inner wall of the sliding groove.

[0006] The utility model as described above is used for the modular phenolic molding compound production rubbing crusher, further: one end of the shell is integrally provided with a bite ring, the bite ring is inserted into the inside of the front end cover away from the shell, and one end of the plug-in arm is fixedly connected to the bite ring.

[0007] The utility model discloses a modular phenolic molding compound production crusher as described above further: the top and bottom of occlusion ring all are provided with limiting slot, the inside limiting slot slides and installs the limiting block, the one side of limiting block is fixedly connected on the inner wall of front end cover.

[0008] The utility model discloses a modular phenolic molding compound production crusher as described above further: the one side of front end cover is provided with transmission shaft, the surface detachable mounting of transmission shaft has the crushing wheel in the shell, the one end fixed mounting of transmission shaft has sprocket no.

[0009] The utility model discloses a modular phenolic molding compound production crusher as described above further: the both sides of front end cover all are fixedly installed with handle, and the surface of handle is provided with antiskid line.

[0010] The utility model discloses a modular phenolic molding compound production crusher as described above further: the top of shell is connected with feeding hopper, and the top of shell is connected with discharge hopper.

[0011] The utility model discloses a modular phenolic molding compound production crusher as described above further: the surface one side of shell is fixedly connected with a plurality of fastening screw rods, one side of shell is provided with rear end cover, the surface fixed connection of rear end cover has the docking sleeve of sleeveing on fastening screw rod, and the surface screw mounting of fastening screw rod has the fastening nut of locating outside docking sleeve, and one end of transmission shaft is rotatably installed in the inside of rear end cover.

[0012] Summarized above, the beneficial effects of the utility model lie in:

[0013] 1, the utility model discloses a modular crusher structure design, so that the crusher in actual work, can according to actual work demand, flexible, fast switching machine's function, realize the purpose of a machine having multiple functions, can replace the corresponding functional components according to actual production demand, complete corresponding production work, improve the performance of the crusher, realize one machine multi -purpose, improve the production efficiency of phenolic molding compound, reduce cost input, provide convenient for user's work use.

[0014] 2, the utility model discloses through the setting of occlusion ring, and occlusion ring can position the installation work of front end cover, and occlusion ring will be inserted into the front end cover when installing the front end cover, so the front end cover is positioned on the occlusion ring, and also is positioned on the shell, thereby avoiding the front end cover to fall, provide convenient for user's dismounting work.

[0015] 3、The utility model discloses through the setting of limit groove and limit block, and limit groove cooperates limit block and can play the limiting effect to the installation of front end cover, and the limit block will be inserted into the corresponding limit groove when installing the front end cover, so can limit the random rotation of front end cover, and provide the convenient work for the dismounting of user.

[0016] 4、The utility model discloses through the setting of transmission shaft, chain wheel no. 1 and the setting of the pulverizer, and the pulverizer is driven by transmission shaft, and same transmission shaft is driven by chain wheel no. 1, and when chain wheel no. 1 is driven, transmission shaft and pulverizer also rotate, thereby completing the processing of material in the casing, guaranteeing the normal work of the pulverizer, and providing the convenient work for the use of user.

[0017] 5、The utility model discloses through the setting of handle, and handle is used for the user to hold, so that the user can use handle to provide the convenient work for the dismounting when dismounting the front end cover, and the surface of handle is provided with anti -skid line, can play the effect of antiskid.

[0018] 6、The utility model discloses through the setting of feeding hopper and discharge hopper, and feeding hopper is used to feed, and when working, material is put into feeding hopper, and then material enters the casing and is processed through feeding hopper, and finally is sent out through discharge hopper, guaranteeing the normal work of the pulverizer, and providing the convenient work for the use of user.

[0019] 7、The utility model discloses through the setting of rear end cover, fastening screw rod, butt joint sleeve and fastening nut, and rear end cover is the rear cover of casing, is used to block the opening of the rear side of casing, avoids the scattering of material, and also provides support for the rotating work of transmission shaft, guarantees the stability of the rotating work of transmission shaft, and fastening screw rod, butt joint sleeve and fastening nut are used to fix rear end cover on casing, and when installing, aligns casing with rear end cover, then controls rear end cover and butt joint sleeve to make fastening screw rod insert into butt joint sleeve and pass through butt joint sleeve, finally fastening nut is fixed on fastening screw rod and can be tightened, so that the dismounting work of rear end cover can be quickly completed, and the convenient work is provided for the dismounting of user. ACCURACY

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0021] Figure 1 It is the whole structure schematic diagram of the utility model;

[0022] Figure 2 It is the three-dimensional structure exploded schematic diagram of the utility model.

[0023] Figure 3 This is a partial three-dimensional cross-sectional view of the present invention;

[0024] Figure 4 This is a sectional view of the three-dimensional structure of the toggle block;

[0025] Figure 5 This is a three-dimensional structural diagram of a fastening nut.

[0026] In the diagram: 1. Housing, 2. Front cover, 3. Movable cavity, 4. Clamping arm, 5. Insertion arm, 6. Actuating block, 7. Sliding block, 8. Adaptor cavity, 9. Spring 1, 10. Sliding groove, 11. Engaging ring, 12. Limiting groove, 13. Limiting block, 14. Drive shaft, 15. Sprocket 1, 16. Handle, 17. Crushing wheel, 18. Feed hopper, 19. Discharge hopper, 20. Rear cover, 21. Fastening screw, 22. Connecting sleeve, 23. Fastening nut. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example

[0028] A modular phenolic molding compound production pulverizer includes a housing 1. A front cover 2 is provided on one side of the housing 1. Movable cavities 3 are provided at the top and bottom of one side of the front cover 2. A clamping arm 4 is rotatably installed on one side of the inner cavity of the movable cavity 3. An insert arm 5 adapted to the clamping arm 4 is inserted into one side of the inner cavity of the movable cavity 3. One end of the insert arm 5 is fixedly connected to the housing 1. A toggle block 6 is slidably installed on one side of the inner cavity of the movable cavity 3. Adaptation cavities 8 adapted to the clamping arm 4 are provided at both ends of one side of the toggle block 6. Sliding grooves 10 are provided on both sides of the inner cavity of the adaptation cavity 8. A sliding block 7 is slidably installed in the inner cavity of the sliding groove 10. One side of the sliding block 7 is movably installed on the clamping arm 4. A spring 9 is fixedly connected to one end of the sliding block 7. The end of the spring 9 away from the sliding block 7 is fixedly connected to the inner wall of the sliding groove 10.

[0029] The specific use process is as follows: first, the crushing structure composed of the front cover 2, the transmission shaft 14, the chain wheel one 15, the crushing wheel 17 and the like can be disassembled from the machine shell 1, that is, the crushing wheel of the crusher can be quickly and flexibly disassembled from the machine, and then other working parts such as a cutting knife and a stirring rod are installed, so that the crusher can be quickly switched into a mixer or a cutting machine according to the actual production needs, thereby meeting different production needs of the phenolic molding plastic, improving the overall performance of the crusher, realizing one machine with multiple functions, enabling the crusher to be put into different production links, improving the production efficiency of the phenolic molding plastic, and reducing the cost input. The specific function switching process is as follows: first, the present scheme is a crusher, the crushing wheel 17 is arranged in the machine shell 1, and is driven to work by the transmission shaft 14, the transmission shaft 14 is driven by the chain wheel one 15, so only a motor is arranged on one side of the crusher, and a chain wheel two matched with the chain wheel one 15 is installed on the motor, finally the chain wheel one 15 and the chain wheel two are connected by a chain, so that the motor can drive the crusher to work, then under the driving of the motor, the chain wheel two drives the chain wheel one 15 to rotate through the chain, the chain wheel one 15 drives the transmission shaft 14 to rotate, the transmission shaft 14 drives the crushing wheel 17 to rotate, then the crushing wheel 17 crushes the material entering the machine shell 1 from the feeding hopper 18, and then the material is discharged through the discharge hopper 19. It should be noted that the crushing wheel 17 can also rotate and convey the material when working, which can shift the material to the direction of the discharge hopper 19, ensure the smooth discharge of the crusher, provide convenience for the user's work, and also reduce the residual material in the machine, thereby providing assistance and convenience for subsequent cleaning work. When switching the working mode of the crusher, the user needs to push the two knobs 6 in opposite directions, then the knobs 6 drive the clamping arms 4 to swing up and down in the activity cavity 3, and the end of the clamping arm 4 towards the insertion arm 5 moves out of the insertion arm 5, then the insertion arm 5 can be removed from the activity cavity 3, then the user holds the entire front cover 2 and separates and takes down all the parts on the front cover 2 from the machine shell 1, so that the transmission shaft 14, the chain wheel one 15 and the crushing wheel 17 installed on the front cover 2 are also taken out, and the limiting block 13 is also removed from the limiting groove 12 at the same time, then the crushing wheel 17 is disassembled from the transmission shaft 14, and then the required parts such as a stirring rod and a cutting knife are installed on the transmission shaft 14. It should be noted that the disassembly and assembly of the crushing wheel 17, the stirring rod and the cutting knife are the same, which can be sleeved on the transmission shaft 14 and then fastened by screws or other installation methods, which are prior art and will not be described in detail. After the stirring rod or the cutting knife is installed on the transmission shaft 14, the front cover 2 with the stirring rod or the cutting knife is aligned with the engagement ring 11 on the machine shell 1 and then clamped on the machine shell 1, during whichThe clamping ring 11 is inserted into the front end cover 2, and can also position the front end cover 2, avoid the front end cover 2 from falling off, and the limiting block 13 is also inserted into the limiting groove 12, and the limiting block 13 cooperates with the limiting groove 12 to limit the front end cover 2 again, avoid the front end cover 2 from rotating randomly, during which the insertion arm 5 on the clamping ring 11 is inserted into the corresponding movable cavity 3, and the end of the insertion arm 5 is pressed against the clamping arm 4 first, then the end of the clamping arm 4 away from the push block 6 is first inserted into the movable cavity 3, and the spring two connected to the clamping arm 4 is compressed at the same time, and the push block 6 also moves accordingly. With the continuous insertion of the insertion arm 5, the recess on the insertion arm 5 is aligned with the end of the clamping arm 4, and then the end of the clamping arm 4 is popped out of the inner cavity of the movable cavity 3 under the action of the spring two and finally clamped into the recess on the insertion arm 5. In this way, the front end cover 2 and all the components mounted on the front end cover 2 can be mounted on the shell 1, including the replacement of the stirring rod or the cutting knife. In this way, the function of the crusher is switched, and the stirring or cutting work can be carried out. It should be noted that when the push block 6 drives the clamping arm 4 to swing, the connection angle between the push block 6 and the clamping arm 4 changes with the displacement of the push block 6. Therefore, the push block 6 and the clamping arm 4 are connected movably, and the clamping arm 4 also drives the sliding block 7 to slide in the corresponding sliding groove 10 with the movement of the push block 6. The end of the clamping arm 4 also rotates in the sliding block 7. The sliding block 7 also stretches the spring one 9 when moving in the fitting cavity 8. In this way, when the clamping arm 4 is reset, the push block 6 is pulled back by the spring one 9, and the sliding block 7 also moves in the sliding groove 10. It should be noted that the spring two on the clamping arm 4 has a greater elastic force than the spring one 9, so that the push block 6 and the clamping arm 4 can work normally. In short, the spring one 9 and the spring two cannot have the same elastic force, and the specific working requirements can be met. It should be noted that when the fastening nut 23 is unscrewed from the fastening screw 21, the rear end cover 20 and the butt joint sleeve 22 can be removed from the shell 1, and then the front end cover 2 can be removed from the shell 1. The specific disassembly process is described above. In this way, the two ends of the shell 1 are connected, and then the inside of the shell 1 can be cleaned more conveniently, providing convenience and assistance for the user's cleaning work. The clamping ring 11 can position the installation of the front end cover 2, and the clamping ring 11 is inserted into the front end cover 2 when the front end cover 2 is installed. In this way, the front end cover 2 is positioned on the clamping ring 11 and the shell 1, thereby avoiding the front end cover 2 from falling off and providing convenience for the user's disassembly work. The limiting groove 12 cooperates with the limiting block 13 to limit the installation of the front end cover 2, and the limiting block 13 is inserted into the corresponding limiting groove 12 when the front end cover 2 is installed. In this way, the front end cover 2 can be limited from rotating randomly, thereby providing convenience for the user's disassembly work. The crushing wheel 17 is driven by the transmission shaft 14, and the transmission shaft 14 is also driven by the chain wheel one 15.When the chain wheel 15 is driven to work, the transmission shaft 14 and the crushing wheel 17 will also rotate, thereby completing the processing of the materials in the shell 1 and ensuring the normal work of the crusher, providing convenience for the user's work and use. The handle 16 is used for the user to hold, so that the user can use the handle 16 for leverage when disassembling the front end cover 2, thereby providing convenience for the user's disassembly work. At the same time, the surface of the handle 16 is provided with anti-skid lines, which can play the role of anti-skid. The feeding hopper 18 is used for feeding. During work, the materials are put into the feeding hopper 18, and then the materials enter the shell 1 through the feeding hopper 18 and are processed, and finally are sent out through the discharge hopper 19, thereby ensuring the normal work of the crusher and providing convenience for the user's work and use. The rear end cover 20 is the rear cover of the shell 1, which is used to block the opening at the rear side of the shell 1 to avoid material scattering, and also provides support for the rotating work of the transmission shaft 14 to ensure the stability of the rotating work of the transmission shaft 14. The fastening screw 21, the butt joint sleeve 22 and the fastening nut 23 are used to fix the rear end cover 20 on the shell 1. During installation, the rear end cover 20 is aligned with the shell 1, and then the rear end cover 20 and the butt joint sleeve 22 are controlled to make the fastening screw 21 inserted into the butt joint sleeve 22 and pass through the butt joint sleeve 22. Finally, the fastening nut 23 is tightened and fixed on the fastening screw 21, so that the disassembly and assembly of the rear end cover 20 can be quickly completed, thereby providing convenience for the user's disassembly work.

[0030] The modular structure design of the crusher enables the crusher to flexibly and quickly switch the functions of the machine according to actual work requirements in actual work, realizes the purpose of one machine having multiple functions, can replace the corresponding functional components according to actual production requirements to complete the corresponding production work, improves the performance of the crusher, realizes one machine with multiple functions, improves the production efficiency of the phenolic molding compound, reduces the cost investment, and provides convenience for the user's work and use.

[0031] One end of the shell 1 is integrally provided with the occlusion ring 11, one side of the occlusion ring 11 away from the shell 1 is inserted into the inside of the front end cover 2, and one end of the insertion arm 5 is fixedly connected to the occlusion ring 11.

[0032] Specifically, the occlusion ring 11 is provided, and the occlusion ring 11 can play a positioning role in the installation of the front end cover 2. When the front end cover 2 is installed, the occlusion ring 11 will be inserted into the front end cover 2, so that the front end cover 2 is positioned on the occlusion ring 11 and the shell 1, thereby avoiding the falling of the front end cover 2 and providing convenience for the user's disassembly work.

[0033] The top and bottom of the occlusion ring 11 are both provided with a limiting groove 12, a limiting block 13 is slidably installed in the limiting groove 12, and one side of the limiting block 13 is fixedly connected to the inner wall of the front end cover 2.

[0034] Specifically, the setting of the limiting groove 12 and the limiting block 13, the limiting groove 12 cooperates with the limiting block 13 to limit the installation of the front end cover 2, the limiting block 13 is inserted into the corresponding limiting groove 12 when the front end cover 2 is installed, so that the front end cover 2 is prevented from rotating randomly, thereby providing convenience for the user's disassembly work.

[0035] One side of the front end cover 2 is provided with a transmission shaft 14, the surface of the transmission shaft 14 is detachably provided with a crushing wheel 17 located in the shell 1, and one end of the transmission shaft 14 is fixedly provided with a sprocket 15 located outside the front end cover 2.

[0036] Specifically, the setting of the transmission shaft 14, the sprocket 15 and the crushing wheel 17, the crushing wheel 17 is driven by the transmission shaft 14, and the transmission shaft 14 is also driven by the sprocket 15, so that the transmission shaft 14 and the crushing wheel 17 rotate when the sprocket 15 is driven, thereby completing the processing of materials in the shell 1 and ensuring the normal operation of the crusher, thereby providing convenience for the user's work.

[0037] Both sides of the front end cover 2 are fixedly provided with handles 16, and the surface of the handle 16 is provided with anti-skid lines.

[0038] Specifically, the setting of the handle 16, the handle 16 is used for the user to grip, so that the user can use the handle 16 as a fulcrum when disassembling the front end cover 2, thereby providing convenience for the user's disassembly work, and the surface of the handle 16 is provided with anti-skid lines, which can prevent slipping.

[0039] The top of the shell 1 is communicated with a feeding hopper 18, and the top of the shell 1 is communicated with a discharging hopper 19.

[0040] Specifically, the setting of the feeding hopper 18 and the discharging hopper 19, the feeding hopper 18 is used for feeding, the material is put into the feeding hopper 18 during work, then the material enters the shell 1 for processing, and finally the material is discharged through the discharging hopper 19, thereby ensuring the normal operation of the crusher and providing convenience for the user's work.

[0041] A plurality of fastening screws 21 are fixedly connected to one side of the surface of the shell 1, a rear end cover 20 is arranged on one side of the shell 1, a butt joint sleeve 22 is fixedly connected to the surface of the rear end cover 20 and sleeved on the fastening screw 21, a fastening nut 23 is threadedly installed on the outside of the butt joint sleeve 22, and one end of the transmission shaft 14 is rotatably installed in the interior of the rear end cover 20.

[0042] Specifically, the rear end cover 20, the fastening screw 21, the butt joint sleeve 22 and the fastening nut 23 are arranged, the rear end cover 20 is the rear cover of the shell 1, used for blocking the opening at the rear side of the shell 1, avoiding material scattering, and also providing support for the rotating work of the transmission shaft 14, ensuring the stability of the rotating work of the transmission shaft 14, the fastening screw 21, the butt joint sleeve 22 and the fastening nut 23 are used for fixing the rear end cover 20 on the shell 1, in the installation, the rear end cover 20 is aligned with the shell 1, then the rear end cover 20 and the butt joint sleeve 22 are controlled to make the fastening screw 21 inserted into the butt joint sleeve 22 and pass through the butt joint sleeve 22, finally the fastening nut 23 is screwed and fixed on the fastening screw 21, so that the dismounting and mounting work of the rear end cover 20 can be quickly completed, providing convenience for the dismounting and mounting work of the user.

[0043] It should be noted that the functions of the hardware in the present application are supported by a large number of mature technologies, which belong to the prior art. The essence of the present application is to optimize and combine the existing hardware and its connection method for specific application occasions to meet the adaptive needs of specific application occasions and solve the problems raised in the background art (without involving the improvement of the internal software of the hardware).

[0044] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A modular phenolic molding compound production shredder comprising a housing (1), characterized in that: The side of the shell (1) is provided with a front end cover (2), the top and bottom of the side of the front end cover (2) are provided with movable cavities (3), the movable cavity (3) is rotatably connected with a clamping arm (4) on one side of the inner cavity, the movable cavity (3) is inserted with a plug-in arm (5) matched with the clamping arm (4) on one side of the inner cavity, one end of the plug-in arm (5) is fixedly connected to the shell (1), a push block (6) is slidably installed on one side of the inner cavity of the movable cavity (3), the two ends of the side of the push block (6) are provided with an adaptive cavity (8) matched with the clamping arm (4), the adaptive cavity (8) is provided with a sliding groove (10) on both sides of the inner cavity, the sliding groove (10) is slidably connected with a sliding block (7), the sliding block (7) is movably connected to the clamping arm (4) on one side, one end of the sliding block (7) is fixedly connected with a spring (9), the end of the spring (9) away from the sliding block (7) is fixedly connected to the inner wall of the sliding groove (10).

2. A modular phenolic molding compound production shredder according to claim 1, characterized in that: The end of the shell (1) is integrally provided with a bite ring (11), the side of the bite ring (11) away from the shell (1) is inserted into the inside of the front end cover (2), one end of the plug-in arm (5) is fixedly connected to the bite ring (11).

3. A modular phenolic molding compound production shredder according to claim 2, characterized in that: The top and bottom of the bite ring (11) are provided with a limiting groove (12), the limiting groove (12) is slidably connected with a limiting block (13), the limiting block (13) is fixedly connected to the inner wall of the front end cover (2) on one side.

4. A modular phenolic molding compound production shredder according to claim 3, characterized in that: The side of the front end cover (2) is provided with a transmission shaft (14), the surface of the transmission shaft (14) is detachably connected with a crushing wheel (17) in the shell (1), one end of the transmission shaft (14) is fixedly connected with a sprocket (15) outside the front end cover (2).

5. A modular phenolic molding compound production shredder according to claim 4, characterized in that: The two sides of the front end cover (2) are fixedly connected with a handle (16), the surface of the handle (16) is provided with anti-skid lines.

6. A modular phenolic molding compound production shredder according to claim 5, characterized in that: The top of the shell (1) is connected with a feeding hopper (18), the top of the shell (1) is connected with a discharging hopper (19).

7. A modular phenolic molding compound production shredder according to claim 6, characterized in that: The surface of the shell (1) is fixedly connected with a plurality of fastening screws (21), the side of the shell (1) is provided with a rear end cover (20), the surface of the rear end cover (20) is fixedly connected with a butt joint sleeve (22) sleeved on the fastening screw (21), the surface of the fastening screw (21) is threadedly connected with a fastening nut (23) outside the butt joint sleeve (22), one end of the transmission shaft (14) is rotatably connected in the inside of the rear end cover (20).

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