Motor assembly structure

Abstract

The application relates to the technical field of motor assembly, in particular to a motor assembly structure which comprises a shell, a blocking opening and an embedding groove arranged at the two ends of the shell, and further comprises a stator core movably installed in the shell and abutting against one end of the blocking opening, a rear end cover movably clamped with one side of the shell and abutting against one end of the embedding groove, a screw for screwing the shell, the stator core and the rear end cover together, a circular groove arranged at the side of the rear end cover abutting against the embedding groove, a circular ring movably arranged in the circular groove, a moving ring movably installed in the circular ring and provided with a groove, a fixing block fixedly installed on the outer side of the circular ring and slidably connected with the groove, and a limiting assembly arranged on the fixing block and capable of controlling the moving distance of the moving ring. The motor assembly structure provided by the application realizes the clamping of the vertical rod and the clamping groove through the cooperation of multiple components such as the moving rod, the clamping groove, the vertical rod and the limiting spring, so that the stability of the abutment between the moving ring and the stator core can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of electric motor assembly technology, and in particular to an electric motor assembly structure. Background Technology

[0002] An electric motor is a power device that converts electrical energy into mechanical energy. It is widely used in industry, transportation, home appliances and other fields. When alternating current is applied to the stator winding, a rotating magnetic field is generated. The rotor cuts magnetic lines of force in the magnetic field and generates induced current (asynchronous motor) or is directly driven by magnetic force (permanent magnet / synchronous motor).

[0003] Currently, electric motors are assembled from a front cover, housing, stator core, and rear cover. The housing and stator core are assembled first, but only one end can be aligned during assembly. Due to dimensional tolerances, the other end cannot be perfectly aligned and requires machining. This assembly method is time-consuming and labor-intensive for machining uneven surfaces, and it also damages the surface of parts, reducing product yield. It complicates the motor assembly process, impacting production capacity and failing to meet the needs of rapid assembly of large batches of motors. Secondly, when the stator core is damaged and a replacement of the same model is unavailable, a shorter stator core must be used. This results in a gap between the rear cover and one side of the stator core, causing instability during operation and affecting the normal operation of the motor. Summary of the Invention

[0004] Therefore, it is necessary to provide a motor assembly structure that can position and install stator cores of different lengths to address the above-mentioned technical problems.

[0005] The present invention provides an electric motor assembly structure, including a housing and a stop and a groove formed at both ends inside the housing, and further comprising:

[0006] The stator core is movably installed inside the housing, with one end abutting against the stop.

[0007] The rear end cover is movably engaged with one side of the housing, and one end abuts against the groove.

[0008] Screws are used to screw the housing, the stator core, and the rear end cover together.

[0009] A circular groove is formed on the side where the rear end cover abuts against the groove;

[0010] A circular ring is movably disposed within the circular groove;

[0011] A movable ring is movably installed inside the circular ring, and a groove is formed on it;

[0012] A fixing block is fixedly installed on the outside of the ring and slidably connected to the groove.

[0013] A limiting component, provided on the fixed block, can control the moving distance of the moving ring.

[0014] In one embodiment, the limiting component includes a movable rod that movably passes through the fixed block. A limiting frame is fixedly sleeved at one end of the movable rod, and both ends of the limiting frame are fixedly connected to the inner wall of the groove. A vertical groove is formed on the upper surface of the fixed block, and a vertical rod is movably disposed in the vertical groove. The vertical rod is connected to the inner wall of the vertical groove by a limiting spring. A slot is formed on the movable rod, and the vertical rod is movably engaged with the slot. A positioning spring is connected between the end of the movable rod away from the limiting frame and the inner wall of the fixed block.

[0015] In one embodiment, a fixing cylinder is movably sleeved on the outer side of the vertical rod, the fixing cylinder is fixedly connected to the upper surface of the fixing block, a horizontal plate is fixedly installed on one side of the fixing cylinder, and a sliding rod is fixedly installed on the inner wall of the groove, the sliding rod being slidably connected to the horizontal plate.

[0016] In one embodiment, a pad is movably disposed within the movable ring, and a movable rod is fixedly disposed at one end of the pad. The end of the movable rod away from the pad movably passes through the movable ring and its end is located within the groove. A circular plate is fixedly sleeved on the end of the movable rod located within the groove, and a connecting spring is fixedly connected between the circular plate and the inner wall of the groove.

[0017] In one embodiment, a positioning frame is fixedly provided on one side of the limiting frame, a crossbar is movably provided through the positioning frame, a limiting plate is fixedly provided at the end of the crossbar near the circular plate, the limiting plate is slidably connected to the positioning frame, and one end of the limiting plate movably abuts against the circular plate.

[0018] In one embodiment, the end of the crossbar away from the limiting plate movably passes through the positioning frame and the end of the crossbar is fixedly provided with a positioning plate. The limiting plate and the inner wall of the positioning frame are connected by a return spring.

[0019] In one embodiment, an abutment plate is fixedly provided on the fixing block, and the positioning plate and the abutment plate are both provided with inclined grooves on the side near each other, and the two inclined grooves are movably abutting each other.

[0020] In one embodiment, a movable groove is provided on the outer side of the rear end cover, and a push ring is movably disposed in the movable groove. The movable groove is connected to the circular groove, and one end of the push ring is fixedly connected to the circular ring.

[0021] In one embodiment, the top of the rear cover has a linear array of multiple limiting holes, and the top of the push ring is provided with a limiting ball, which is movably engaged with the push ring.

[0022] In one embodiment, a collar is fixedly disposed in the limiting hole, and a push rod is movably disposed through the center of the collar. One end of the push rod is movably abutting against the limiting ball. The push rod and the collar are connected by a locking spring. Multiple push rods are provided, and the tops of the multiple push rods are connected together by a pressure plate.

[0023] The aforementioned motor assembly structure achieves the engagement of the vertical rod and the slot through the cooperation of multiple components such as the moving rod, the slot, the vertical rod, and the limiting spring, which ensures the stability of the contact between the moving ring and the stator core. The cooperation of multiple components such as the circular plate, the moving rod, and the connecting spring improves the tightness of the contact between the pad and the stator core, further ensuring the stability of the stator core. The engagement of the limiting hole and the limiting ball ensures that the push ring remains in a fixed state, and the circular ring and the moving ring also maintain their respective stability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the screw structure in this invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the shell in this invention;

[0028] Figure 4 This is a schematic diagram of the rear end cover in this invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the rear end cover in this invention;

[0030] Figure 6 This is a schematic diagram of the movable rod in this invention;

[0031] Figure 7 This is a schematic diagram of the groove structure in this invention;

[0032] Figure 8 This is a schematic diagram of the limiting frame in this invention;

[0033] Figure 9 for Figure 8 Enlarged diagram of part A in the middle;

[0034] Figure 10This is a schematic diagram of the structure of the fixed cylinder in this invention;

[0035] Figure 11 This is a schematic diagram of the internal structure of the fixing block in this invention;

[0036] Figure 12 This is a schematic diagram of the inclined groove in this invention;

[0037] Figure 13 This is a schematic diagram of the internal structure of the positioning frame in this invention;

[0038] Figure 14 This is a schematic diagram of the limiting ball in this invention;

[0039] Figure 15 This is a schematic diagram of the top rod in this invention.

[0040] Figure label:

[0041] 1. Housing; 101. Stop; 102. Groove; 2. Stator core; 3. Screw; 4. Rear end cover; 41. Circular groove; 42. Moving groove; 43. Limiting hole; 5. Circular ring; 6. Moving ring; 61. Groove; 7. Fixing block; 8. Limiting assembly; 81. Moving rod; 82. Limiting bracket; 83. Vertical groove; 84. Vertical rod; 85. Limiting spring; 86. Slot; 87. Positioning spring 9. Fixed cylinder; 10. Horizontal plate; 11. Sliding rod; 12. Pad plate; 13. Movable rod; 14. Circular plate; 15. Connecting spring; 16. Positioning frame; 17. Horizontal bar; 18. Limiting plate; 19. Positioning plate; 20. Return spring; 21. Abutment plate; 22. Inclined groove; 23. Push ring; 24. Limiting ball; 25. Collar; 26. Top rod; 27. Locking spring; 28. Pressure plate. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0047] The following is combined with Figures 1-15 This invention describes an electric motor assembly structure.

[0048] like Figures 1-11 As shown, in one embodiment, an electric motor assembly structure includes a housing 1 and slots 101 and grooves 102 formed at both ends inside the housing 1, and further includes:

[0049] The stator core 2 is movably installed inside the housing 1, with one end abutting against the stop 101;

[0050] The rear cover 4 is movably snapped into one side of the housing 1, and one end abuts against the groove 102;

[0051] Screw 3 is used to screw together housing 1, stator core 2 and rear end cover 4;

[0052] A circular groove 41 is formed on the side where the rear end cover 4 abuts against the groove 102;

[0053] The circular ring 5 is movably set within the circular groove 41;

[0054] The movable ring 6 is movably installed inside the circular ring 5, and a groove 61 is provided on it;

[0055] The fixing block 7 is fixedly installed on the outside of the ring 5 and slidably connected to the groove 61;

[0056] The limiting component 8 is located on the fixed block 7 and can control the moving distance of the moving ring 6.

[0057] Specifically, when assembling the motor, insert one end of the stator core 2 into the housing 1 until one end of the stator core 2 abuts against the stop 101 on one side. If the length of the stator core 2 matches the housing 1, then the other end of the stator core 2 will be flush with the groove 102 on the other side of the housing 1. Then, align the rear end cover 4 with the housing 1. The interior of the rear end cover 4 abuts against the groove 102 and the stator core 2, which ensures the stability of the stator core 2. After the rear end cover 4 is installed, screws 3 are passed through the housing 1, the stator core 2, and the rear end cover 4, and the three are screwed together. This completes the installation of the motor, which is convenient and quick. If the length of the stator core 2 is slightly short, when one end of the stator core 2 abuts against the stop 101, the other end has not yet reached the position of the groove 102. At this time, after the rear end cover 4 is connected to the housing 1, the inside of the rear end cover 4 abuts against the groove 102, but there is still a certain distance from the stator core 2. This will cause the stator core 2 to be unstable during operation. The circular groove 41 is opened below the groove 102. The circular ring 5 moves into the housing 1. The circular ring 5 moves outward along the circular groove 41. The moving ring 6 also moves synchronously with the circular ring 5. In the initial state, the moving ring 6 has a part Located on the outside of the circular ring 5, when the moving ring 6 moves to abut one end of the stator core 2, it will move relatively inward towards the inside of the circular ring 5 under the limiting action of the stator core 2. During the movement, the moving ring 6 will not collide with the fixed block 7 due to the action of the groove 61. After the moving ring 6 moves inward a certain distance, the limiting component 8 will work to limit the moving ring 6, and the moving ring 6 can no longer move relative to the circular ring 5. At this time, the moving ring 5 stops moving, and one end of the moving ring 6 abuts against the stator core 2 to ensure the stability of the stator core 2. Then, the three are fixed with screws 3.

[0058] See Figures 9-11As shown, in this embodiment, the limiting component 8 includes a movable rod 81 that movably passes through the fixed block 7. One end of the movable rod 81 is fixedly fitted with a limiting frame 82, and both ends of the limiting frame 82 are fixedly connected to the inner wall of the groove 61. A vertical groove 83 is provided on the upper surface of the fixed block 7, and a vertical rod 84 is movably arranged in the vertical groove 83. The vertical rod 84 is connected to the inner wall of the vertical groove 83 by a limiting spring 85. A slot 86 is provided on the movable rod 81, and the vertical rod 84 is movably engaged with the slot 86. A positioning spring 87 is connected between the end of the movable rod 81 away from the limiting frame 82 and the inner wall of the fixed block 7.

[0059] Specifically, when the moving ring 6 moves synchronously with the circular ring 5 until one end of the moving ring 6 abuts against one end of the stator core 2, the moving ring 6 will then move inward relative to the circular ring 5. The movement of the moving ring 6 will drive the limiting frame 82 and the moving rod 81 to move synchronously together. The moving rod 81 moves inward into the fixed block 7. In the initial state, the bottom of the vertical rod 84 is located inside the fixed block 7 and is in contact with the upper surface of the moving rod 81. The limiting spring 85 is in a compressed state. When the moving rod 81 moves to the slot 86 and aligns with the vertical rod 84, the vertical rod 84 will move downward along the vertical groove 83 under the action of the limiting spring 85. The vertical rod 84 is engaged with the slot 86. At this time, the moving rod 81 is in a state where it cannot move. Neither the limiting frame 82 nor the moving ring 6 can continue to move. During the movement of the moving rod 81, the positioning spring 87 will be compressed. The positioning spring 87 can help the moving rod 81 return to its initial position. The state in which one end of the moving ring 6 abuts against the stator core 2 can ensure the stability of the stator core 2 during use.

[0060] See Figures 7-10 As shown, in this embodiment, a fixed cylinder 9 is movably sleeved on the outside of the vertical rod 84. The fixed cylinder 9 is fixedly connected to the upper surface of the fixed block 7. A horizontal plate 10 is fixedly installed on one side of the fixed cylinder 9. A sliding rod 11 is fixedly installed on the inner wall of the groove 61. The sliding rod 11 is slidably connected to the horizontal plate 10.

[0061] Specifically, when the moving ring 6 moves together with the limiting frame 82 and the moving rod 81 toward the inside of the ring 5, the sliding rod 11 slides along the horizontal plate 10. When the moving rod 81 moves to the position of the slot 86 below the vertical rod 84, the limiting spring 85 will cause the vertical rod 84 to move downward along the fixed cylinder 9 and engage with the slot 86. The moving rod 81 is in a state where it cannot move. The cooperation between the fixed cylinder 9 and the vertical rod 84 can ensure that the ring 5 and the moving ring 6 can move synchronously toward the inside of the housing 1 in the initial stage.

[0062] See Figures 4-6 and Figure 8 and Figure 9As shown, in this embodiment, a pad 12 is movably disposed inside the movable ring 6. A movable rod 13 is fixedly disposed at one end of the pad 12. The end of the movable rod 13 away from the pad 12 movably passes through the movable ring 6 and the end is located in the groove 61. A circular plate 14 is fixedly sleeved on the end of the movable rod 13 located in the groove 61. A connecting spring 15 is fixedly connected between the circular plate 14 and the inner wall of the groove 61.

[0063] Specifically, when one end of the moving ring 6 abuts against the stator core 2, the moving ring 6 will move a certain distance inward relative to the circular ring 5 and then stop. One end of the moving ring 6 will remain in contact with the stator core 2. The pad 12 is located at the center of the side of the moving ring 6 that abuts against the stator core 2. The pad 12 abuts against the positioning core. The pad 12 is designed with a hard plate on the side that contacts the stator core 2 to ensure the stability of the abutment. The side that contacts the movable rod 13 is also a hard plate. A flexible component fills the space between the two hard plates. After the moving ring 6 abuts, it pushes the circular plate 14 towards the stator core 2. The circular plate 14 drives the movable rod 13 and the pad 12 to move, which will squeeze the flexible component in the middle of the pad 12, making the hard plate at one end of the pad 12 abut against the stator core 2 more tightly. During the movement of the circular plate 14, the connecting spring 15 will be compressed.

[0064] See Figure 9 , Figure 10 and Figures 12-13 As shown, in this embodiment, a positioning frame 16 is fixedly installed on one side of the limiting frame 82, and a crossbar 17 is movably installed through the positioning frame 16. A limiting plate 18 is fixedly installed at one end of the crossbar 17 near the circular plate 14. The limiting plate 18 is slidably connected to the positioning frame 16, and one end of the limiting plate 18 is movably abutting against the circular plate 14.

[0065] Specifically, after the moving ring 6 abuts against the stator core 2, it moves into the inner ring 5 until the vertical rod 84 engages with the slot 86. The moving ring 6 remains stationary. Before the vertical rod 84 engages with the slot 86, one end of the limiting plate 18 abuts against the circular plate 14, and the connecting spring 15 is in a stretched state. After the moving rod 81 is positioned, the horizontal rod 17 moves into the positioning frame 16. The movement of the horizontal rod 17 drives the limiting plate 18 to move. The limiting plate 18 no longer abuts against the circular plate 14. Under the action of the connecting spring 15, it will drive the circular plate 14, the moving rod 13, and the pad 12 to move closer to the stator core 2. This allows the pad 12 to abut against the stator core 2 more tightly.

[0066] See Figure 12 and Figure 13 As shown, in this embodiment, the end of the crossbar 17 away from the limiting plate 18 moves through the positioning frame 16 and the end is fixedly provided with a positioning plate 19. The limiting plate 18 and the inner wall of the positioning frame 16 are connected by a return spring 20.

[0067] Specifically, the lateral movement of the positioning plate 19 causes the horizontal bar 17 to move, thereby causing the limiting plate 18 to move laterally. During this process, the return spring 20 is compressed, and the limiting plate 18 no longer abuts against the circular plate 14. Under the action of the connecting spring 15, the pad 12 abuts against the stator core 2 more tightly.

[0068] See Figure 10 and Figure 12 As shown, in this embodiment, an abutment plate 21 is fixedly installed on the fixing block 7, and inclined grooves 22 are opened on the side of the positioning plate 19 and the abutment plate 21, and the two inclined grooves 22 are movably abutted.

[0069] Specifically, the moving ring 6, the limiting frame 82, the positioning frame 16, and the positioning plate 19 move together toward the inside of the ring 5. During this process, the limiting plate 18 and the circular plate 14 remain in contact. When the moving rod 81 cannot move due to the jamming of the slot 86 and the vertical rod 84, the inclined groove 22 opened by the positioning plate 19 and the inclined groove 22 opened by the abutment plate 21 make contact. The positioning plate 19 drives the horizontal rod 17 and the limiting plate 18 to move away from the circular plate 14. The limiting plate 18 does not abut against the circular plate 14. Under the action of the connecting spring 15, the pad 12 and the stator core 2 will abut more tightly.

[0070] See Figure 1 , Figure 3 As shown, in this embodiment, a movable groove 42 is provided on the outer side of the rear cover 4, and a push ring 23 is movably disposed in the movable groove 42. The movable groove 42 is connected to the circular groove 41, and one end of the push ring 23 is fixedly connected to the circular ring 5.

[0071] Specifically, after the rear cover 4 docks with the housing 1, the push ring 23 is pushed inward along the moving groove 42. The push ring 23 drives the circular ring 5 to move along the circular groove 41, and the moving ring 6 moves synchronously. Finally, the moving ring 6 and the pad 12 can be made to abut against the stator core 2 to ensure its stability.

[0072] See Figure 1 and Figure 14 As shown, in this embodiment, the top of the rear cover 4 has a linear array of multiple limiting holes 43, and the top of the push ring 23 is provided with a limiting ball 24, which is movably engaged with the push ring 23.

[0073] Specifically, after the moving ring 6 and the stator core 2 are in stable contact, the limiting ball 24 engages with the corresponding limiting hole 43. At this time, the push ring 23 cannot move, and the ring 5 remains fixed, which can further ensure that the moving ring 6 will not move. Multiple limiting holes 43 can ensure that the push ring 23 can remain stable after moving inward by different distances, and can be adapted to stator cores 2 of different lengths.

[0074] See Figure 15As shown, in this embodiment, a collar 25 is fixedly installed inside the limiting hole 43, and a push rod 26 is movably installed through the center of the collar 25. One end of the push rod 26 is movably abutting against the limiting ball 24. The push rod 26 and the collar 25 are connected by a locking spring 27. Multiple push rods 26 are provided, and the tops of the multiple push rods 26 are connected together by a pressure plate 28.

[0075] Specifically, in the initial state, the limiting ball 24 is engaged with the outermost limiting hole 43. When the position of the moving ring 6 needs to be adjusted, the pressure plate 28 is pressed down. The pressure plate 28 drives multiple push rods 26 to move downward, preventing the limiting ball 24 from engaging with the limiting hole 43. Then, the push ring 23 is pushed inward. Since the push rods 26 are flush with the bottom of the limiting hole 43, the limiting ball 24 will not engage with any of the limiting holes 43 during this process and will compress the locking spring 27. The limiting ball 24 is made of an elastic material. The push ring 23 is made so that the inward movement of the push ring 23 can ensure smooth flow. After the moving ring 6 abuts against the stator core 2 and remains stable, the force applied to the pressure plate 28 is removed. Under the action of the locking spring 27, the push rod 26 and the pressure plate 28 will move upward to the initial position. The limiting ball 24 will engage with the limiting hole 43 directly above it due to the loss of the squeezing action of the push rod 26, ensuring the stability of the push ring 23, the ring 5 and the moving ring 6. The collar 25 provides support for the locking spring 27.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An electric motor assembly structure, comprising a housing and slots and recesses formed at both ends inside the housing, characterized in that, Also includes: The stator core is movably installed inside the housing, with one end abutting against the stop. The rear end cover is movably engaged with one side of the housing, and one end abuts against the groove. Screws are used to screw the housing, the stator core, and the rear end cover together. A circular groove is formed on the side where the rear end cover abuts against the groove; A circular ring is movably disposed within the circular groove; A movable ring is movably installed inside the circular ring, and a groove is formed on it; A fixing block is fixedly installed on the outside of the ring and slidably connected to the groove. A limiting component, disposed on the fixed block, controls the moving distance of the moving ring. The limiting component includes a moving rod that movably passes through the fixed block. A limiting frame is fixedly sleeved at one end of the moving rod, and both ends of the limiting frame are fixedly connected to the inner wall of the groove. A vertical groove is formed on the upper surface of the fixed block, and a vertical rod is movably disposed in the vertical groove. The vertical rod is connected to the inner wall of the vertical groove by a limiting spring. A slot is formed on the moving rod, and the vertical rod is movably engaged with the slot. A positioning spring is connected between the end of the moving rod away from the limiting frame and the inner wall of the fixed block.

2. The electric motor assembly structure according to claim 1, characterized in that, A fixing cylinder is movably sleeved on the outside of the vertical rod. The fixing cylinder is fixedly connected to the upper surface of the fixing block. A horizontal plate is fixedly installed on one side of the fixing cylinder. A sliding rod is fixedly installed on the inner wall of the groove. The sliding rod is slidably connected to the horizontal plate.

3. The electric motor assembly structure according to claim 1, characterized in that, A pad is movably disposed inside the movable ring. A movable rod is fixedly disposed at one end of the pad. The end of the movable rod away from the pad passes through the movable ring and its end is located in the groove. A circular plate is fixedly sleeved on the part of the movable rod located in the groove. A connecting spring is fixedly connected between the circular plate and the inner wall of the groove.

4. The electric motor assembly structure according to claim 3, characterized in that, A positioning frame is fixedly installed on one side of the limiting frame, and a crossbar is movably installed through the positioning frame. A limiting plate is fixedly installed at the end of the crossbar near the circular plate. The limiting plate is slidably connected to the positioning frame, and one end of the limiting plate movably abuts against the circular plate.

5. The electric motor assembly structure according to claim 4, characterized in that, The crossbar extends through the positioning frame at one end away from the limiting plate and is fixedly provided with a positioning plate at its end. The limiting plate is connected to the inner wall of the positioning frame by a return spring.

6. The electric motor assembly structure according to claim 5, characterized in that, An abutment plate is fixedly installed on the fixed block. An inclined groove is opened on the side of the positioning plate and the abutment plate, and the two inclined grooves abut against each other.

7. The electric motor assembly structure according to claim 1, characterized in that, The outer side of the rear cover is provided with a movable groove, and a push ring is movably disposed in the movable groove. The movable groove is connected to the circular groove, and one end of the push ring is fixedly connected to the circular ring.

8. The electric motor assembly structure according to claim 7, characterized in that, The top of the rear cover has multiple limiting holes arranged in a linear array, and the top of the push ring is provided with a limiting ball, which is movably engaged with the push ring.

9. The electric motor assembly structure according to claim 8, characterized in that, A collar is fixedly installed inside the limiting hole, and a push rod is movably installed through the center of the collar. One end of the push rod is movably abutting against the limiting ball. The push rod and the collar are connected by a locking spring. Multiple push rods are provided, and the tops of the multiple push rods are connected together by a pressure plate.

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