Non-permanent magnet motor rotor punching sheet structure and rotor

Abstract

The invention relates to the technical field of motor rotors, in particular to a non-permanent magnet motor rotor punching sheet structure and a rotor, which comprises a rotating shaft, a rotor structure is mounted on the rotating shaft, a stator structure is arranged on the outer side of the rotor structure, and symmetrical fastening mechanisms are mounted at two ends of the rotating shaft; through installation of the rotor structure and the stator structure, winding of multiple sets of coils is facilitated, electric energy is converted into kinetic energy, the heat dissipation effect is improved, the air gap waveform is optimized, the air gap waveform is more sinusoidal, the torque fluctuation of the motor is effectively reduced, the NVH of the motor is effectively reduced, and through installation of the fastening mechanism, abutting against the two ends of the rotor structure is facilitated, so that the rotor structure and the rotating shaft are stably installed; and rotor structures with different thicknesses can be limited, and the fastening mechanism is limited through the cooperation of the locking mechanism, so that the fastening mechanism and the rotating shaft can be firmly installed without loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of motor rotors, in particular to a non-permanent magnet motor rotor punching sheet structure and a rotor. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electrical rotational torque, thereby providing power for the device.

[0003] However, the current new energy industry is mainly based on permanent magnet synchronous motors and asynchronous AC motors. The permanent magnet synchronous motors are characterized by high efficiency and high cost, while the asynchronous motors are low cost and low efficiency. Therefore, we combine the advantages of the two and propose a new structural motor. In addition, the existing motors have poor heat dissipation effect. At the same time, when the punch plates are installed, most of them are installed by snap-fitting, which makes subsequent disassembly and assembly cumbersome and easy to become loose over time, affecting the normal operation of the motor. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a non-permanent magnet motor rotor punching structure and a rotor.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a non-permanent magnet motor rotor punching structure and a rotor, including a rotating shaft, a rotor structure is installed on the rotating shaft, a stator structure is provided on the outside of the rotor structure, and symmetrical fastening mechanisms are installed at both ends of the rotating shaft.

[0006] Specifically, the rotor structure includes rotor punchings, and multiple tightly stacked rotor punchings are installed on the rotating shaft. Multiple rotor punchings are provided with multiple deduplication holes distributed in an annular shape and at equal intervals, and multiple groups of second auxiliary grooves distributed in an annular shape and at equal intervals are provided at the edges of multiple rotor punchings.

[0007] Specifically, a mounting hole is provided at the center line of the rotor punching, and a limit key is symmetrically connected to the edge of the mounting hole. The rotor punching is detachably connected to the rotating shaft through the mounting hole, and a symmetrical slot is provided on the outside of the rotating shaft, and the limit key is slidably connected to the slot.

[0008] Specifically, a plurality of annular protrusions distributed evenly on one side edge of the plurality of rotor punchings are provided, and a plurality of annular grooves distributed evenly on the other side edge of the plurality of rotor punchings are provided, and the protrusions are engaged with the inside of the grooves.

[0009] Specifically, the protrusion and the groove are in a T-shaped structure, and the depth of the groove is greater than the thickness of the protrusion.

[0010] Specifically, the stator structure includes stator punchings, multiple stator punchings that are stacked and tightly fitted are concentrically arranged on the outside of the multiple rotor punchings, multiple stator punchings are provided with multiple heat dissipation grooves that are equidistantly distributed in an annular shape, and multiple groups of first auxiliary grooves that are equidistantly distributed in an annular shape are provided on the inner circular side walls of the multiple stator punchings, and the multiple groups of first auxiliary grooves correspond to the multiple groups of second auxiliary grooves.

[0011] Specifically, the outer circumferential side walls of the plurality of stator punching sheets are provided with a plurality of equally spaced positioning grooves, and the rotor punching sheets are of a "M"-shaped structure.

[0012] Specifically, the fastening mechanism includes a fixing sleeve, and the two ends of the rotating shaft are respectively connected with symmetrical fixing sleeves in a sliding manner through a slot, and a rack is respectively installed inside the two slots, and symmetrical tooth blocks are installed inside the two symmetrical side walls of the fixing sleeve. The tooth blocks are slidably connected to the inside of the side wall of the fixing sleeve through a resistance spring, and one end of the two symmetrical tooth blocks respectively extends into the slot to engage with the rack.

[0013] Specifically, a locking mechanism is installed on the fixed sleeve, and the locking mechanism includes a limit block. Two symmetrical limit blocks are slidably connected to the inside of the two side walls of the fixed sleeve, one end of the limit block is in contact with the side wall of the gear block, and the side wall of the fixed sleeve is vertically connected to two parallel screws, one end of the screw is internally threaded with one end of the limit block, and the other end of the screw extends to the outside of the fixed sleeve.

[0014] Specifically, a limiting groove is provided at the top end of one side of the tooth block, the limiting block is engaged with the inside of the limiting groove, and a corner at one end of the limiting block is provided with a certain slope.

[0015] Specifically, a connecting spring is connected between the other end of the limit block and the inner side of the fixing sleeve, and the limit block can slide telescopically with the inner side of the fixing sleeve through the connecting spring, and the connecting spring is slidably connected to the outer side of the screw.

[0016] Specifically, a plurality of blades equidistantly distributed in a circular shape are respectively installed on the outer edges of the two fixing sleeves, and a certain angle is formed between the blades and the outer wall of the fixing sleeve.

[0017] The beneficial effects of the present invention are:

[0018] (1) The non-permanent magnet motor rotor punching structure and rotor described in the present invention facilitate the winding of multiple sets of coils through the installation of the rotor structure and the stator structure, realize the conversion of electrical energy into kinetic energy, increase the heat dissipation effect, optimize the air gap waveform to make it more sinusoidal, effectively reduce the motor torque fluctuation, and effectively reduce the motor NVH.

[0019] (2) The non-permanent magnet motor rotor punching structure and rotor described in the present invention facilitate the collision of the two ends of the rotor structure through the installation of the fastening mechanism, so that the rotor structure and the rotating shaft are stably installed, and can limit the rotor structures of different thicknesses.

[0020] (3) The non-permanent magnet motor rotor punching structure and rotor described in the present invention achieve the limitation of the fastening mechanism through the cooperation of the locking mechanism, which is conducive to the firm installation between the fastening mechanism and the rotating shaft without loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0023] Figure 2 Schematic diagram of the connection structure between the rotor punching and the stator punching of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the heat sink and the stator punching sheet of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure between the fixed sleeve and the rotating shaft of the present invention;

[0026] Figure 5 Schematic diagram of the connection structure between the screw and the fixed sleeve of the present invention;

[0027] Figure 6 Schematic diagram of the connection structure between the tooth block and the rack of the present invention;

[0028] Figure 7 A schematic diagram of the connection structure between the protrusion and the rotor punching of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection structure between the groove and the rotor punching of the present invention.

[0030] In the figure: 1. rotating shaft; 2. stator structure; 201. stator punching; 202. positioning groove; 203. heat dissipation groove; 204. first auxiliary groove; 3. rotor structure; 301. rotor punching; 302. mounting hole; 303. limit key; 304. deweighting hole; 305. second auxiliary groove; 306. protrusion; 307. slot; 308. groove; 4. fastening mechanism; 401. fixing sleeve; 402. blade; 403. rack; 404. tooth block; 405. interference spring; 5. locking mechanism; 501. screw; 502. limit block; 503. connecting spring; 504. limit groove. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figure 1 、 Figure 2 and Figure 4 As shown, the non-permanent magnet motor rotor punching structure and rotor described in the present invention include a rotating shaft 1, a rotor structure 3 is installed on the rotating shaft 1, a stator structure 2 is provided on the outside of the rotor structure 3, and symmetrical fastening mechanisms 4 are installed at both ends of the rotating shaft 1.

[0033] Specifically, such as Figure 1 、 Figure 2 and Figure 3 As shown, the rotor structure 3 includes a rotor punching 301, and a plurality of tightly stacked rotor punchings 301 are installed on the rotating shaft 1. A plurality of the rotor punchings 301 are provided with a plurality of de-weighting holes 304 distributed in an annular shape and equidistantly, and a plurality of groups of second auxiliary slots 305 distributed in an annular shape and equidistantly are provided at the edges of the plurality of the rotor punchings 301. The installation of the rotor punchings 301 tightly stacked is beneficial to the subsequent winding of the coil. With the cooperation of the rotating shaft 1, it is convenient for high-speed and stable rotation. With the cooperation of the de-weighting holes 304, the rotor weight is reduced, the rotor inertia is reduced, and the motor power density is improved. The de-weighting holes 304 can effectively increase the rotor ventilation capacity, reduce the rotor temperature, and improve the rated performance of the motor. By opening the first auxiliary slots 204, the air gap waveform is optimized to make it more sinusoidal, effectively reducing the motor torque fluctuation and effectively reducing the motor NVH.

[0034] Specifically, such as Figure 2 、 Figure 7 and Figure 8 As shown, a mounting hole 302 is provided at the center line of the rotor punching 301, and a limit key 303 is symmetrically connected at the edge of the mounting hole 302. The rotor punching 301 is detachably connected to the rotating shaft 1 through the mounting hole 302, and a symmetrical slot 307 is provided on the outside of the rotating shaft 1. The limit key 303 is slidably connected to the slot 307. The opening of the mounting hole 302 facilitates detachable installation with the rotating shaft 1. Through the cooperation of the limit key 303 and the slot 307, the rotor punching 301 and the rotating shaft 1 can only slide and cannot rotate, thereby realizing the synchronous rotation of the rotor punching 301 and the rotating shaft 1.

[0035] Specifically, such as Figure 2 、 Figure 3 、 Figure 7 and Figure 8As shown, multiple annular and equidistantly distributed protrusions 306 are provided on the edge of one side of the multiple rotor punchings 301, and multiple annular and equidistantly distributed grooves 308 are provided on the edge of the other side of the multiple rotor punchings 301. The protrusions 306 are engaged with the inside of the grooves 308. The opening of the grooves 308 and the protrusions 306 facilitates the close fitting of the multiple rotor punchings 301 after stacking, and the protrusions 306 can be engaged with the inside of the grooves 308. After the multiple rotor punchings 301 are fitted together, they cannot rotate, which plays a role in anti-slip and stability, and the edges of the multiple rotors will not debond or warp.

[0036] Specifically, such as Figure 7 and Figure 8 As shown, the protrusion 306 and the groove 308 are "T"-shaped structures, and the depth of the groove 308 is greater than the thickness of the protrusion 306, which is conducive to injecting a large amount of glue into the inside of the groove 308, so that the protrusion 306 and the inside of the groove 308 are firmly bonded, thereby preventing warping.

[0037] Specifically, such as Figure 1 、 Figure 2 and Figure 3 As shown, the stator structure 2 includes a stator punching 201, and multiple stator punchings 201 that are tightly stacked are concentrically arranged on the outer side of the multiple rotor punchings 301. Multiple heat dissipation grooves 203 that are equidistantly distributed in an annular shape are provided on the multiple stator punchings 201. Multiple groups of first auxiliary slots 204 that are equidistantly distributed in an annular shape are provided on the inner circular side walls of the multiple stator punchings 201. Multiple groups of first auxiliary slots 204 correspond to multiple groups of second auxiliary slots 305. The installation of multiple tightly stacked stator punchings 201 is conducive to winding the coil, thereby forming a corresponding torque with the coil on the rotor punching 301, realizing the rotation of the rotor punching 301 and the rotating shaft 1, and well converting electrical energy into kinetic energy output. The correspondence between multiple groups of first auxiliary slots 204 and multiple groups of second auxiliary slots 305 is conducive to optimizing the air gap waveform, making it more sinusoidal, effectively reducing motor torque fluctuation and effectively reducing motor NVH.

[0038] Specifically, such as Figure 2 and Figure 3 As shown, the outer circular side walls of the multiple stator punching sheets 201 are provided with multiple equally spaced positioning grooves 202, and the rotor punching sheet 301 is a "M"-shaped structure. The opening of the multiple positioning grooves 202 facilitates the multiple stacked and tightly fitted stator punching sheets 201 to be stably mounted on the outer inner wall of the motor, plays a limiting role, and enables more coils to be well wound around the outer side of the rotor punching sheet 301.

[0039] Specifically, such as Figure 1 、 Figure 4 、 Figure 5 and Figure 6 As shown, the fastening mechanism 4 includes a fixing sleeve 401, and the two ends of the rotating shaft 1 are respectively connected to the symmetrical fixing sleeves 401 through the slots 307 for sliding. Racks 403 are respectively installed inside the two slots 307, and symmetrical tooth blocks 404 are installed inside the side walls of the two symmetrical fixing sleeves 401. The tooth blocks 404 are slidably connected to the side walls of the fixing sleeve 401 through the interference springs 405. One end of the two symmetrical tooth blocks 404 respectively extends to the inside of the slots 307 and engages with the racks 403. Through the cooperation of the slots 307, the two fixing sleeves 401 can slide on the rotating shaft 1. Through the installation of the racks 403, the tooth blocks 404 and the racks are engaged with each other under the interference of the interference springs 405. The engagement of the bars 403 is conducive to limiting the position of the fixed sleeve 401. By pushing the two fixed sleeves 401 together with a certain force, the two fixed sleeves 401 drive the tooth block 404 to conflict with the rack 403. The tooth block 404 will overcome the elastic force of the conflicting spring 405 and contract, so that the tooth block 404 and the rack 403 slide to a certain position, thereby realizing the sliding of the fixed sleeve 401 and the rotating shaft 1, and the two fixed sleeves 401 are always in conflict with the multiple rotor punchings 301, so that the multiple rotor punchings 301 are stably installed on the rotating shaft 1. Through the adjustment of the two fixed sleeves 401, it is convenient to install the rotor punchings 301 of different thicknesses as needed, thereby improving the installation range.

[0040] Specifically, such as Figure 4 、 Figure 5 and Figure 6 As shown, the fixing sleeve 401 is equipped with a locking mechanism 5, which includes a limit block 502. The two side walls of the fixing sleeve 401 are slidably connected with symmetrical limit blocks 502. One end of the limit block 502 contacts the side wall of the tooth block 404. The side wall of the fixing sleeve 401 is vertically connected to two parallel screws 501. One end of the screw 501 is internally threaded with one end of the limit block 502. The other end of the screw 501 extends to the outside of the fixing sleeve 401, through the limit block 50 2, by rotating the screw 501, the screw 501 drives and controls the limit block 502, so that the limit block 502 is in close contact with the tooth block 404, and the tooth block 404 is in close contact with the rack 403 and cannot be loosened, so that the fixed sleeve 401 and the rotating shaft 1 are stably installed, and by rotating the screw 501 in the opposite direction, the limit block 502 is separated from the tooth block 404, which facilitates the sliding of the tooth block 404, thereby realizing the sliding adjustment of the position of the fixed sleeve 401.

[0041] Specifically, such as Figure 6As shown, a limiting groove 504 is provided at the top of one side of the tooth block 404, and the limiting block 502 is engaged with the inside of the limiting groove 504. A certain slope is provided at one end corner of the limiting block 502, which is conducive to the smooth engagement of the limiting block 502 with the inside of the limiting groove 504, so that the tooth block 404 cannot slide, thereby increasing the limiting effect.

[0042] Specifically, such as Figure 6 As shown, a connecting spring 503 is connected between the other end of the limit block 502 and the inner side of the fixed sleeve 401. The limit block 502 can slide telescopically with the inner side of the fixed sleeve 401 through the connecting spring 503. The connecting spring 503 is slidably connected to the outer side of the screw 501. The installation of the connecting spring 503 is conducive to always maintaining resistance to the limit block 502, so that the limit block 502 is stably installed in the fixed sleeve 401, and the screw 501 and the limit block 502 will not loosen.

[0043] Specifically, such as Figure 5 and Figure 6 As shown, a plurality of blades 402 equidistantly distributed in a circular shape are respectively installed at the outer edges of the two fixing sleeves 401. The blades 402 have a certain angle with the outer wall of the fixing sleeve 401. The installation of the blades 402 facilitates the generation of airflow when the fixing sleeve 401 rotates with the rotating shaft 1, thereby playing a role in heat dissipation.

[0044] When the present invention is in use, first, multiple rotor punchings 301 are installed in conjunction with the rotating shaft through the mounting holes 302 and are firmly glued with glue. The installation of the rotor punchings 301 that are tightly fitted through multiple stacks is conducive to the subsequent winding of the coil. With the cooperation of the rotating shaft 1, it is convenient for high-speed and stable rotation. With the cooperation of the deweighting holes 304, the rotor weight is reduced, the rotor inertia is reduced, and the motor power density is improved. The deweighting holes 304 can effectively increase the rotor ventilation capacity, reduce the rotor temperature, and improve the rated performance of the motor. By opening the first auxiliary slot 204, the air gap waveform is optimized to make it more sinusoidal, effectively reducing the motor torque fluctuation and the motor NVH. By opening the mounting holes 302, it is convenient for detachable installation with the rotating shaft 1, and the limit key is used. The cooperation between 303 and the card slot 307 makes the rotor punching 301 and the rotating shaft 1 only able to slide but not rotate, so that the rotor punching 301 and the rotating shaft 1 rotate synchronously together. The opening of the groove 308 and the protrusion 306 facilitates the close fitting of multiple rotor punchings 301, and the protrusion 306 can be engaged with the inside of the groove 308. After the multiple rotor punchings 301 are fitted together, they cannot rotate, which plays a role in preventing slipping and stability. In addition, the glue at the edges of the multiple rotors will not peel off and warp, which facilitates the injection of a large amount of glue into the inside of the groove 308, so that the protrusion 306 and the inside of the groove 308 are firmly bonded, which plays a role in preventing warping. The installation of the stator punchings 201 with multiple layers of close fitting is conducive to winding the coil, thereby forming a corresponding relationship with the coil on the rotor punching 301. The torque is used to realize the rotation of the rotor punching 301 and the rotating shaft 1, and the electrical energy is well converted into kinetic energy output. The correspondence between the multiple groups of first auxiliary slots 204 and the multiple groups of second auxiliary slots 305 is conducive to optimizing the air gap waveform, making it more sinusoidal, effectively reducing the motor torque fluctuation and effectively reducing the motor NVH. The opening of multiple positioning slots 202 is conducive to the multiple stacked stator punchings 201 that are tightly fitted to the outer inner wall of the motor for stable installation, which plays a role of limiting and enables more coils to be well wound around the outer side of the rotor punching 301. The cooperation of the card slot 307 enables the two fixing sleeves 401 to slide on the rotating shaft 1. Through the installation of the rack 403, the tooth block 404 is engaged with the rack 403 under the interference of the interference spring 405. It is beneficial to limit the fixed sleeve 401. By pushing the two fixed sleeves 401 closer with a certain force, the two fixed sleeves 401 drive the tooth block 404 to conflict with the rack 403. The tooth block 404 will overcome the elastic force of the conflicting spring 405 and shrink, so that the tooth block 404 and the rack 403 slide to a certain position, thereby realizing the sliding of the fixed sleeve 401 and the rotating shaft 1, and the two fixed sleeves 401 are always in conflict with the multiple rotor punchings 301, so that the multiple rotor punchings 301 are stably installed on the rotating shaft 1. Through the adjustment of the two fixed sleeves 401, it is convenient to install rotor punchings 301 of different thicknesses as needed, thereby improving the installation range. Through the installation of the limit block 502, the screw 501 is threadedly rotated to make the screw 501 drive and control the limit block 502.The limit block 502 is in close contact with the tooth block 404, and the tooth block 404 is in close contact with the rack 403 and cannot be loosened, so that the fixed sleeve 401 and the rotating shaft 1 are stably installed. By rotating the screw 501 in the opposite direction, the limit block 502 and the tooth block 404 are separated, which facilitates the sliding of the tooth block 404, and realizes the sliding adjustment of the fixed sleeve 401, which is conducive to the smooth engagement of the limit block 502 with the inner part of the limit groove 504, so that the tooth block 404 cannot slide, thereby increasing the limiting effect. The installation of the connecting spring 503 is conducive to always maintaining the contact between the limit block 502, so that the limit block 502 is stably installed in the fixed sleeve 401, and there is no looseness between the screw 501 and the limit block 502. The installation of the blade 402 is conducive to the generation of airflow when the fixed sleeve 401 rotates with the rotating shaft 1, thereby playing a role in heat dissipation.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A non-permanent magnet motor rotor punching structure and rotor, characterized in that: It comprises a rotating shaft (1), a rotor structure (3) is mounted on the rotating shaft (1), a stator structure (2) is provided outside the rotor structure (3), and symmetrical fastening mechanisms (4) are mounted at both ends of the rotating shaft (1); The rotor structure (3) comprises a rotor punching (301), a plurality of tightly laminated rotor punchings (301) are mounted on the rotating shaft (1), a plurality of weight removal holes (304) equidistantly distributed in an annular shape are provided on the plurality of rotor punchings (301), and a plurality of groups of second auxiliary grooves (305) equidistantly distributed in an annular shape are provided at the edges of the plurality of rotor punchings (301); The stator structure (2) comprises a stator punching sheet (201), a plurality of stator punching sheets (201) stacked and tightly fitted are concentrically arranged on the outer sides of the plurality of rotor punching sheets (301), a plurality of heat dissipation grooves (203) distributed in an annular shape and at equal intervals are provided on the plurality of stator punching sheets (201), a plurality of groups of first auxiliary grooves (204) distributed in an annular shape and at equal intervals are provided on the inner circular side walls of the plurality of stator punching sheets (201), and the plurality of groups of the first auxiliary grooves (204) and the plurality of groups of the second auxiliary grooves (305) correspond to each other.

2. The non-permanent magnet motor rotor punching structure and rotor according to claim 1, characterized in that: A mounting hole (302) is provided at the center line of the rotor punching (301), and a limit key (303) is symmetrically connected to the edge of the mounting hole (302). The rotor punching (301) is detachably connected to the rotating shaft (1) through the mounting hole (302), and a symmetrical clamping groove (307) is provided on the outer side of the rotating shaft (1), and the limit key (303) is slidably connected to the clamping groove (307).

3. The non-permanent magnet motor rotor punching structure and rotor according to claim 1, characterized in that: A plurality of protrusions (306) in an annular shape and distributed evenly are provided on one side edge of the plurality of rotor punching sheets (301), and a plurality of grooves (308) in an annular shape and distributed evenly are provided on the other side edge of the plurality of rotor punching sheets (301), and the protrusions (306) are engaged with the inside of the grooves (308).

4. The non-permanent magnet motor rotor punching structure and rotor according to claim 3, characterized in that: The protrusion (306) and the groove (308) are in a T-shaped structure, and the depth of the groove (308) is greater than the thickness of the protrusion (306).

5. The non-permanent magnet motor rotor punching structure and rotor according to claim 1, characterized in that: The outer circular side walls of the plurality of stator punching sheets (201) are provided with a plurality of equally spaced positioning grooves (202), and the rotor punching sheet (301) is of a "M"-shaped structure.

6. The non-permanent magnet motor rotor punching structure and rotor according to claim 1, characterized in that: The fastening mechanism (4) comprises a fixing sleeve (401), and the two ends of the rotating shaft (1) are respectively connected to symmetrical fixing sleeves (401) through slots (307) in a sliding manner, and racks (403) are respectively installed inside the two slots (307). Symmetric tooth blocks (404) are installed inside the side walls of the two symmetrical fixing sleeves (401), and the tooth blocks (404) are connected to the side walls of the fixing sleeve (401) in a sliding manner through a resisting spring (405). One end of the two symmetrical tooth blocks (404) respectively extends to the inside of the slots (307) and engages with the racks (403).

7. The non-permanent magnet motor rotor punching structure and rotor according to claim 6, characterized in that: A locking mechanism (5) is installed on the fixing sleeve (401), and the locking mechanism (5) includes a limit block (502). The two side walls of the fixing sleeves (401) are slidably connected to the inner sides thereof with symmetrical limit blocks (502). One end of the limit block (502) contacts the side wall of the tooth block (404). The side wall of the fixing sleeve (401) is vertically rotatably connected to two parallel screw rods (501). One end of the screw rod (501) is internally threadedly connected to one end of the limit block (502), and the other end of the screw rod (501) extends to the outside of the fixing sleeve (401).

8. The non-permanent magnet motor rotor punching structure and rotor according to claim 7, characterized in that: A limiting groove (504) is provided at the top end of one side of the tooth block (404), the limiting block (502) is engaged with the inside of the limiting groove (504), and a corner at one end of the limiting block (502) is provided with a certain slope.

9. The non-permanent magnet motor rotor punching structure and rotor according to claim 8, characterized in that: A connecting spring (503) is connected between the other end of the limit block (502) and the inner side of the fixed sleeve (401), and the limit block (502) can slide telescopically with the inner side of the fixed sleeve (401) through the connecting spring (503), and the connecting spring (503) is slidably connected to the outer side of the screw rod (501).

10. The non-permanent magnet motor rotor punching structure and rotor according to claim 9, characterized in that: A plurality of blades (402) equidistantly distributed in a circular shape are respectively installed at the outer edges of the two fixing sleeves (401), and the blades (402) have a certain angle with the outer wall of the fixing sleeve (401).

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