Micro motor

Abstract

The utility model relates to the technical field of micro motors, in particular to a micro motor. Comprising a shell, a rotor winding, a stator winding and an end cover, the rotor winding is rotationally connected into the shell through a bearing, the middle of the rotor winding is fixedly connected with an output shaft, the stator winding is arranged outside the rotor winding in a surrounding mode, a frame facilitating installation of the stator winding is arranged on the stator winding, the stator winding is embedded in the frame, and the end cover is fixedly connected with the rotor winding. A positioning clamping assembly facilitating installation of the frame is arranged in the shell, the end cover is fixedly connected to the end of the shell, and a fixing assembly facilitating installation of the end cover is arranged in the shell. According to the micro motor provided by the utility model, through the design of the fixing assembly, a traditional bolt connection fixing mode is abandoned, so that the disassembly between the end cover and the shell can be completed only by pulling the pulling plate outwards, rotating the end cover anticlockwise by a certain angle and then pulling out the end cover outwards during work, and the maintenance efficiency of the micro motor is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro motors, in particular to a micro motor. Background Art

[0002] A micro motor refers to a motor with a diameter less than 160mm or a rated power less than 750W. Micro motors are often used in control systems or transmission mechanical loads to realize functions such as detection, analytical calculation, amplification, execution or conversion of electromechanical signals or energy.

[0003] Most of the existing micro motors are composed of stator windings, rotor windings, output shafts, housings and end covers, wherein the rotor windings and the output shafts are mostly fixed by mechanical connection, adhesive connection and welding connection, and are rotatably arranged inside the housing, and the stator windings and the end covers are mostly fixed to the housing by bolt connection. Although this connection method can effectively ensure the stability of the connection, we found in actual use that when the micro motor fails and needs to be disassembled and repaired, the staff needs to use specific tools to disassemble the end cover before they can inspect the internal components. In order to ensure the stability of the connection between the end cover and the housing, a plurality of connecting bolts for fixing are mostly provided between the end cover and the housing, which results in the staff spending a lot of time on screwing the screws when disassembling and installing the end cover, and the operation is relatively cumbersome, and the efficiency of maintenance is low;

[0004] Moreover, during the inspection and maintenance of the micro motor, if a stator winding fault is found, the staff still needs to unscrew multiple fixing bolts to disassemble the stator winding before the stator winding can be taken out from the shell. The entire disassembly process of the stator winding is relatively cumbersome and the practical performance of the device is poor.

[0005] To this end, we design a micro motor to provide another technical solution to the above technical problems. Utility Model Content

[0006] Based on this, it is necessary to provide a micro motor that is easy to disassemble and repair in order to solve the above technical problems.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A micro motor comprises a shell, a rotor winding, a stator winding and an end cover, wherein the rotor winding is rotatably connected to the inside of the shell through a bearing and an output shaft is fixedly connected to the middle thereof, the stator winding is arranged around the outside of the rotor winding, the stator winding is provided with a frame for facilitating the installation of the stator winding, the stator winding is embedded in the frame, a positioning clamping assembly for facilitating the installation of the frame is provided inside the shell, the end cover is fixedly connected to the end of the shell, and a fixing assembly for facilitating the installation of the end cover is provided inside the shell.

[0009] Preferably, the positioning clamping assembly includes a plurality of positioning guide rods fixedly arranged on the frame, the outer side of the positioning guide rods is flush with the end of the frame, a plurality of positioning guide grooves and positioning slots matching the positioning guide rods are respectively provided inside the shell and on the rotor winding, and a limiting ring for limiting the position of the frame and the rotor winding is provided on the outer side of the frame.

[0010] Preferably, the limiting ring is threadedly connected to the inside of the shell and abuts against the frame on one side, a plurality of abutment blocks abutting against the end of the rotor winding are evenly distributed on the inner ring of the limiting ring, and a plurality of rotating blocks for easy rotation are evenly distributed on the outer side of the limiting ring.

[0011] Preferably, the mating surfaces of the end cover and the shell are provided with threaded teeth, the shell is provided with connecting threads matching the threaded teeth, the outside of the end cover is fixedly connected with a plurality of plug-in blocks for facilitating the installation of the end cover, and the shell is provided with an L-shaped guide block matching the plug-in block.

[0012] Preferably, both sides of the end cover are movably connected with fixed blocks that cooperate with the fixed assembly, the end cover is provided with a slide groove that facilitates the movement of the fixed block, the fixed block is clamped inside the slide groove, a compression spring is provided on the side of the fixed block close to the shell, the two ends of the compression spring are respectively fixedly connected to the fixed block and the inner wall of the slide groove, a connecting rod is fixedly provided on the other side of the fixed block, one end of the connecting rod away from the fixed block passes through the end cover and is connected to a pulling plate, and a sealing ring matching the connecting rod is provided on the end cover;

[0013] The fixing assembly includes a plurality of arc-shaped slots that are opened inside the shell and match the fixed card blocks. A push plate is provided at the end of the arc-shaped slot to push the fixed card block. The push plate is clamped in the arc-shaped slot. A plurality of compression springs are provided on the side of the push plate away from the fixed card block. The two ends of the compression springs are respectively fixedly connected to the push plate and the inner wall of the arc-shaped slot.

[0014] Preferably, an L-shaped block for limiting the position of the push plate is provided inside the arc-shaped slot, the L-shaped block is arranged inside the arc-shaped slot and one end of the L-shaped block abuts against the side wall of the push plate, a compression spring three is provided on the side of the L-shaped block away from the push plate, the two ends of the compression spring three are respectively fixedly connected to the L-shaped block and the inner wall of the arc-shaped slot, an arc block is fixedly provided on the L-shaped block for cooperating with the push plate and the fixed block to control the movement state of the L-shaped block, and the end of the arc block is embedded in the arc-shaped slot.

[0015] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0016] At the same time, through the above technical solutions, the utility model has at least the following beneficial effects:

[0017] 1. The utility model provides a micro motor, which limits the position of the stator winding inside the shell through the design of the positioning clamping assembly, so that when the staff needs to repair or replace the stator winding, they only need to remove the end cover from the shell, rotate the limit ring out of the shell, and then pull the stator winding out along the shell.

[0018] 2. The micro motor provided by the utility model, through the design of L-shaped guide block and plug-in block, is convenient for the staff to control the plug-in position of the end cover, avoiding unnecessary jamming during the fixing process of the end cover and the shell, and effectively improving the actual use effect of the device.

[0019] 3. The micro motor provided by the utility model abandons the traditional bolt connection fixing method through the design of the fixing component, so that when the staff needs to disassemble the end cover, they only need to pull the pulling plate outward and rotate the end cover counterclockwise for a certain angle and then pull it outward to complete the disassembly between the end cover and the shell, which effectively improves the staff's maintenance efficiency of the micro motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the axial structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the micro motor of the utility model in a disassembled state;

[0023] Figure 3It is a schematic diagram of the installation structure of the rotor winding and the stator winding of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the positioning clamping assembly of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the plug-in state of the end cover and the shell of the utility model;

[0026] Figure 6 It is a schematic diagram of the matching structure of the end cover and the fixing assembly of the utility model;

[0027] Figure 7 It is a schematic diagram of the matching structure of the fixed clamping block and the push plate of the utility model.

[0028] In the figure: 1. shell; 2. rotor winding; 3. stator winding; 4. end cover; 5. output shaft; 6. frame; 7. positioning guide rod; 8. positioning guide groove; 9. positioning slot; 10. limit ring; 11. abutment block; 12. rotating block; 13. threaded teeth; 14. connecting thread; 15. plug-in block; 16. L-shaped guide block; 17. fixed block; 18. slide groove; 19. compression spring one; 20. connecting rod; 21. pulling plate; 22. sealing ring; 23. arc-shaped slot; 24. push plate; 25. compression spring two; 26. L-shaped block; 27. compression spring three; 28. arc-shaped block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Example

[0031] Reference Figure 1-7 A micro motor comprises a housing 1, a rotor winding 2, a stator winding 3 and an end cover 4. The rotor winding 2 is rotatably connected to the housing 1 through a bearing and an output shaft 5 is fixedly connected to the middle thereof. The stator winding 3 is arranged outside the rotor winding 2. A frame 6 is provided on the stator winding 3 for facilitating the installation of the stator winding 3. The stator winding 3 is embedded in the frame 6. A positioning clamping component is provided inside the housing 1 for facilitating the installation of the frame 6. The end cover 4 is fixedly connected to the end of the housing 1. A fixing component is provided inside the housing 1 for facilitating the installation of the end cover 4.

[0032] Reference Figure 2-4The positioning clamping assembly includes a plurality of positioning guide rods 7 fixedly arranged on the frame 6, and the outer side of the positioning guide rods 7 is flush with the end of the frame 6. A plurality of positioning guide grooves 8 and positioning slots 9 matching the positioning guide rods 7 are respectively provided inside the shell 1 and on the rotor winding 2. A limiting ring 10 for limiting the position of the frame 6 and the rotor winding 2 is provided on the outer side of the frame 6. Specifically, in the utility model, through the design of the positioning guide rods 7 and the positioning slots 9, it is convenient to limit the position of the stator winding 3 inside the frame 6, thereby avoiding the rotation of the stator winding 3 during operation and ensuring the stable operation of the micro motor; through the design of the positioning guide rods 7, the positioning guide grooves 8 and the limiting ring 10, the positioning installation of the frame 6 and the stator winding 3 in the shell 1 is realized, so that when the staff needs to repair or replace the stator winding 3, they only need to remove the end cover 4 from the shell 1, screw the limiting ring 10 out of the shell 1, and then pull the stator winding 3 out along the shell 1.

[0033] Reference Figure 2-4 The limiting ring 10 is threadedly connected to the inside of the housing 1 and abuts against the frame 6 on one side. A plurality of abutment blocks 11 abutting against the end of the rotor winding 2 are evenly distributed on the inner ring of the limiting ring 10, and a plurality of rotating blocks 12 for easy rotation are evenly distributed on the outer side of the limiting ring 10. Specifically, in the utility model, the position of the frame 6 and the stator winding 3 that are movably plugged in the housing 1 is restricted through the design of the limiting ring 10 and the abutment block 11, so as to avoid the shaking of the frame 6 and the stator winding 3 due to the external force, so that the coil on the stator winding 3 directly conflicts with the end cover 4 or the inner wall of the housing 1, causing short circuit or open circuit, thereby improving the stability of the operation of the micro motor;

[0034] It should be noted that in this embodiment, the top end of the abutment block 11 on the limit ring 10 is slightly lower than the bottom end of the positioning guide rod 7. Through this design, unnecessary movement interference between the abutment block 11 fixed thereon and the end of the positioning guide rod 7 is avoided when the limit ring 10 is screwed into the shell 1, thereby ensuring the normal use of the positioning clamping assembly.

[0035] When installing the stator winding 3, the staff rotates the stator winding 3 to a certain angle so that the positioning slot 9 on the stator winding 3 is aligned with the positioning guide rod 7, and then inserts the stator winding 3 into the frame 6 along the positioning guide rod 7 to complete the installation between the stator winding 3 and the frame 6, and then rotates the assembled frame 6 to a certain angle so that the positioning guide rod 7 on the frame 6 is aligned with the positioning guide groove 8 on the shell 1, and then inserts the frame 6 into the shell 1 along the positioning guide groove 8. At this time, the limit ring 10 is screwed into the shell 1 so that the side walls of the limit ring 10 and the abutment block 11 are respectively abutted against the frame 6 and one side of the stator winding 3 to complete the positioning installation of the stator winding 3 in the shell 1.

[0036] Reference Figure 5-6 , a thread tooth 13 is provided on the mating surface of the end cover 4 and the shell 1, a connecting thread 14 matching the thread tooth 13 is provided on the shell 1, and a plurality of plug-in blocks 15 for facilitating the installation of the end cover 4 are fixedly connected to the outside of the end cover 4, and an L-shaped guide block 16 matching the plug-in block 15 is provided on the shell 1. Specifically, in the utility model, the initial fixed connection between the end cover 4 and the shell 1 is realized through the design of the thread tooth 13 and the connecting thread 14, which is convenient for subsequent cooperation with the fixed component and effectively improves the efficiency of disassembly and installation between the end cover 4 and the shell 1; through the design of the plug-in block 15 and the L-shaped guide block 16, the position of the end cover 4 inserted into the shell 1 is controlled, so that the fixed block 17 on the subsequent end cover 4 cooperates with the fixed component to ensure the normal use of the fixed component.

[0037] Reference Figure 6-7 , both sides of the end cover 4 are movably connected with fixed blocks 17 that match the fixed assembly, and the end cover 4 is provided with a slide groove 18 that facilitates the movement of the fixed block 17, and the fixed block 17 is clamped inside the slide groove 18, and a compression spring 19 is provided on the side of the fixed block 17 close to the housing 1, and the two ends of the compression spring 19 are respectively fixedly connected to the fixed block 17 and the inner wall of the slide groove 18, and a connecting rod 20 is fixedly provided on the other side of the fixed block 17, and the end of the connecting rod 20 away from the fixed block 17 passes through the end cover 4 and is connected to a pulling plate 21, and a sealing ring 22 matching the connecting rod 20 is provided on the end cover 4;

[0038] The fixing assembly includes a plurality of arc-shaped slots 23 that match the fixed card block 17 and are opened inside the housing 1. The end of the arc-shaped slot 23 is provided with a push plate 24 that pushes the fixed card block 17. The push plate 24 is clamped in the arc-shaped slot 23. A plurality of compression springs 25 are provided on the side of the push plate 24 away from the fixed card block 17. The two ends of the compression spring 25 are respectively fixedly connected to the push plate 24 and the inner wall of the arc-shaped slot 23. Specifically, in the utility model, through the design of the fixed card block 17, the slide groove 18 and the compression spring 19 and the push plate 24 cooperates with the compression spring 25 to further limit the position of the end cover 4 in the shell 1, thereby preventing the threaded connection between the end cover 4 and the shell 1 from loosening due to the vibration of the micro motor itself or external impact, thereby simplifying the steps of fixing the end cover 4 and the shell 1, effectively ensuring the connection strength between the end cover 4 and the shell 1 after installation, and improving the practical performance of the device; on the other hand, through the design of the connecting rod 20 and the pulling plate 21, it is convenient for the staff to disassemble the end cover 4, ensuring the normal use of the fixing assembly.

[0039] It should be noted that, in the present invention, the elastic force generated by the plurality of compression springs 25 is greater than the elastic force generated by the compression spring 19. This design ensures that after the end cover 4 is threadedly connected to the housing 1, the fixed clamping blocks 17 designed movably on both sides of the end cover 4 can be embedded into the ends of the arc-shaped clamping grooves 23 under the action of the compression springs 25 and the push plates 24, so as to limit the position of the end cover 4 after the threaded connection with the housing 1, thereby preventing the threaded connection between the end cover 4 and the housing 1 from loosening and effectively improving the stability of the connection.

[0040] On the other hand, the lateral dimension of the longer section of the arc-shaped slot 23 is slightly larger than the lateral dimension of the fixed block 17 plus the dimension of the end cover 4 threadedly connected and screwed into the shell 1. Through this design, while achieving normal movement of the fixed block 17 in the arc-shaped slot 23, the normal screwing of the threaded connection between the end cover 4 and the shell 1 is guaranteed, thereby avoiding unnecessary movement interference during the fixing process of the end cover 4 and the shell 1, and improving the stability of the installation process.

[0041] After the end cover 4 and the shell 1 are installed in the above manner, if the micro motor vibrates due to its own operation or external impact, the fixed block 17 and the push plate 24 connected by the compression spring 19 and the compression spring 25 will slide inside the arc groove 23 to offset the vibration force generated by the micro motor. In this process, as long as the fixed block 17 does not slide out of the end of the arc groove 23, the end cover 4 threadedly connected to the shell 1 cannot rotate, thereby effectively avoiding the loose connection between the thread teeth 13 and the connecting thread 14, and ensuring the stability of the end cover 4 and the shell 1 after installation.

[0042] Reference Figure 7 The arc groove 23 is provided with an L-shaped block 26 for limiting the position of the push plate 24. The L-shaped block 26 is clamped in the arc groove 23 and one end thereof abuts against the side wall of the push plate 24. A compression spring 3 27 is provided on the side of the L-shaped block 26 away from the push plate 24. The two ends of the compression spring 3 27 are respectively fixedly connected to the L-shaped block 26 and the inner wall of the arc groove 23. The L-shaped block 26 is fixedly provided with an arc block 28 for cooperating with the push plate 24 and the fixed block 17 to control the movement state of the L-shaped block 26. The end of the arc block 28 is embedded in the arc groove 23. Specifically, in the utility model, the movement state of the push plate 24 is controlled by the design of the L-shaped block 26, the compression spring 3 27 and the arc block 28, so that the push plate 24 can be compressed in the arc groove 23 when the fixed block 17 is not pushed, thereby ensuring the normal sliding of the fixed block 17 in the arc groove 23.

[0043] When installing the end cover 4, the staff rotates the end cover 4 at a certain angle to align the plug-in block 15 on the end cover 4 with the L-shaped guide block 16 on the shell 1, and then inserts the end cover 4 into the shell 1 along the L-shaped guide block 16, and when the fixed card blocks 17 on both sides of the end cover 4 abut against the inner wall of the arc-shaped card slot 23, the end cover 4 is rotated clockwise to gradually screw the end cover 4 into the shell 1. In this process, the fixed card blocks 17 movably connected on both sides of the end cover 4 slide inside the arc-shaped card slot 23 as the end cover 4 rotates, and the arc-shaped card slot 23 is pressed against the inner wall of the arc-shaped card slot 23. The movably connected arc block 28 is pressed, and when the arc block 28 is completely retracted into the arc slot 23, the fixed block 17 conflicts with the inner wall of the arc slot 23, and the staff cannot continue to rotate the end cover 4. At this time, the L-shaped block 26 controlled by the arc block 28 is completely retracted into the arc slot 23 and disengaged from the side wall of the push plate 24. The push plate 24 then pushes the fixed block 17 under the action of the compression spring 25, so that the fixed block 17 is embedded in the end of the arc slot 23, and the fixed installation of the end cover 4 in the shell 1 can be completed.

[0044] The use process of a micro motor provided by the utility model is as follows:

[0045] When installing the stator winding 3, the staff rotates the stator winding 3 to a certain angle so that the positioning slot 9 on the stator winding 3 is aligned with the positioning guide rod 7, and then inserts the stator winding 3 into the frame 6 along the positioning guide rod 7 to complete the installation between the stator winding 3 and the frame 6, and then rotates the assembled frame 6 to a certain angle so that the positioning guide rod 7 on the frame 6 is aligned with the positioning guide groove 8 on the shell 1, and then inserts the frame 6 into the shell 1 along the positioning guide groove 8. At this time, the limit ring 10 is screwed into the shell 1 so that the side walls of the limit ring 10 and the abutment block 11 are respectively abutted against the frame 6 and one side of the stator winding 3, and the positioning installation of the stator winding 3 in the shell 1 is completed;

[0046] When installing the end cover 4, the staff rotates the end cover 4 at a certain angle to align the plug-in block 15 on the end cover 4 with the L-shaped guide block 16 on the shell 1, and then inserts the end cover 4 into the shell 1 along the L-shaped guide block 16, and when the fixed card blocks 17 on both sides of the end cover 4 abut against the inner wall of the arc-shaped card slot 23, the end cover 4 is rotated clockwise to gradually screw the end cover 4 into the shell 1. In this process, the fixed card blocks 17 movably connected on both sides of the end cover 4 slide inside the arc-shaped card slot 23 as the end cover 4 rotates, and the arc-shaped card slot 23 is pressed against the inner wall of the arc-shaped card slot 23. The movable arc block 28 is pressed, and when the arc block 28 is completely retracted into the arc slot 23, the fixed block 17 conflicts with the inner wall of the arc slot 23, and the staff cannot continue to rotate the end cover 4. At this time, the L-shaped block 26 controlled by the arc block 28 is completely retracted into the arc slot 23 and separated from the side wall of the push plate 24. The push plate 24 then pushes the fixed block 17 under the action of the compression spring 25, so that the fixed block 17 is embedded in the end of the arc slot 23, and the end cover 4 can be fixedly installed in the housing 1.

[0047] When the end cover 4 needs to be disassembled, the staff only needs to pull the pulling plate 21 outward so that the fixed card block 17 drives the push plate 24 to move outward, and squeeze the arc block 28 to make the L-shaped card plate retract into the arc slot 23, so that the push plate 24 continues to slide outward through the L-shaped card plate. During this process, the fixed card plate always squeezes the arc block 28, and then the staff rotates the end cover 4 counterclockwise to make the fixed card block 17 abut against the inner wall of the arc slot 23, and then pull out the end cover 4 to complete the disassembly between the end cover 4 and the shell 1.

[0048] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A micro motor, comprising a housing (1), a rotor winding (2), a stator winding (3) and an end cover (4), characterized in that: The rotor winding (2) is rotatably connected to the inside of the housing (1) via a bearing and is fixedly connected to an output shaft (5) in the middle thereof; the stator winding (3) is arranged outside the rotor winding (2); a frame (6) is provided on the stator winding (3) for facilitating the installation of the stator winding (3); the stator winding (3) is embedded in the frame (6); a positioning clamping assembly is provided inside the housing (1) for facilitating the installation of the frame (6); the end cover (4) is fixedly connected to the end of the housing (1); and a fixing assembly is provided inside the housing (1) for facilitating the installation of the end cover (4).

2. A micro motor according to claim 1, characterized in that: The positioning clamping assembly comprises a plurality of positioning guide rods (7) fixedly arranged on the frame (6); the outer side of the positioning guide rods (7) is flush with the end of the frame (6); the interior of the housing (1) and the rotor winding (2) are respectively provided with a plurality of positioning guide grooves (8) and positioning slots (9) matching the positioning guide rods (7); and the outer side of the frame (6) is provided with a limit ring (10) for limiting the position of the frame (6) and the rotor winding (2).

3. A micro motor according to claim 2, characterized in that: The limiting ring (10) is threadedly connected to the inside of the housing (1) and abuts against the frame (6) on one side; a plurality of abutment blocks (11) abutting against the end of the rotor winding (2) are evenly distributed on the inner ring of the limiting ring (10); and a plurality of rotation blocks (12) for easy rotation are evenly distributed on the outer side of the limiting ring (10).

4. A micro motor according to claim 1, characterized in that: The mating surfaces of the end cover (4) and the shell (1) are provided with thread teeth (13); the shell (1) is provided with connecting threads (14) matching the thread teeth (13); the outside of the end cover (4) is fixedly connected with a plurality of plug-in blocks (15) for facilitating the installation of the end cover (4); and the shell (1) is provided with L-shaped guide blocks (16) matching the plug-in blocks (15).

5. A micro motor according to claim 4, characterized in that: The two sides of the end cover (4) are movably connected with fixed blocks (17) matched with the fixed assembly, and the end cover (4) is provided with a slide groove (18) for facilitating the movement of the fixed block (17). The fixed block (17) is clamped inside the slide groove (18), and a compression spring (19) is provided on the side of the fixed block (17) close to the shell (1), and the two ends of the compression spring (19) are respectively fixedly connected to the fixed block (17) and the inner wall of the slide groove (18), and a connecting rod (20) is fixedly provided on the other side of the fixed block (17), and the end of the connecting rod (20) away from the fixed block (17) passes through the end cover (4) and is connected to a pulling plate (21), and a sealing ring (22) matching the connecting rod (20) is provided on the end cover (4); The fixing assembly comprises a plurality of arc-shaped slots (23) which are opened inside the housing (1) and match the fixing block (17); a push plate (24) is provided at the end of the arc-shaped slot (23) for pushing the fixing block (17); the push plate (24) is clamped in the arc-shaped slot (23); a plurality of compression springs (25) are provided on a side of the push plate (24) away from the fixing block (17); and two ends of the compression springs (25) are respectively fixedly connected to the push plate (24) and the inner wall of the arc-shaped slot (23).

6. A micro motor according to claim 5, characterized in that: An L-shaped block (26) for limiting the position of the push plate (24) is provided inside the arc-shaped slot (23); the L-shaped block (26) is clamped inside the arc-shaped slot (23) and one end of the L-shaped block (26) is in contact with the side wall of the push plate (24); a compression spring (27) is provided on the side of the L-shaped block (26) away from the push plate (24); the two ends of the compression spring (27) are respectively fixedly connected to the L-shaped block (26) and the inner wall of the arc-shaped slot (23); an arc-shaped block (28) is fixedly provided on the L-shaped block (26) for cooperating with the push plate (24) and the fixed block (17) to control the movement state of the L-shaped block (26); and the end of the arc-shaped block (28) is embedded in the arc-shaped slot (23).

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