Rotor structure with floating and wear compensation, electric machine and method of assembly

Abstract

The application discloses a rotor structure with floating and wear compensation functions, a motor and an assembling method, and relates to the technical field of motor rotor assembling and connecting. The application solves the problems of centrifugal torque failure, punching stress damage and start-stop wear loosening in the prior art. The application comprises a rotating shaft, a rotor core, a plurality of wedge-shaped block assemblies and a plurality of anti-loosening compensation assemblies. The rotating shaft is provided with a plurality of webs, and the top surface of the web is provided with a boss. The rotor core is provided with a shaft hole, the inner wall of the shaft hole is provided with a plurality of grooves, the rotating shaft is arranged in the shaft hole, and the top surface of the web is connected with the inner wall of the shaft hole. The two side walls of the boss are connected with the grooves through the wedge-shaped block assemblies. The anti-loosening compensation assembly is installed at one end of the boss. The wedge-shaped block assembly and the anti-loosening compensation assembly are elastically connected, and are used for dynamically adjusting the wedge-tightening force of the wedge-shaped block assembly when the gap between the rotating shaft and the rotor core changes, so as to ensure the torque transmission between the rotating shaft and the rotor core. The application is mainly used for the motor under the working conditions of frequent start-stop and high rotating speed.

Description

Technical Field

[0001] This invention relates to the field of motor rotor assembly and connection technology, and in particular to a rotor structure, motor and assembly method with floating and wear compensation functions. Background Technology

[0002] In traditional high-power, high-speed (power exceeding 2000kW, speed greater than 750r / min) motor rotor structures, the rotor core laminations are typically directly fitted onto the outside of the spoke shaft using an interference fit. Torque transmission relies entirely on the frictional force generated by the interference fit to achieve a keyed connection. This structure exhibits the following significant drawbacks when facing high-speed, high-centrifugal-force, and frequent start-stop conditions: 1. Torque transmission failure caused by centrifugal force: When the motor rotates at high speed, the rotor core laminations are subjected to huge centrifugal force and undergo radial expansion, which causes the interference between the inner hole and the spoke shaft to gradually disappear (the radial pressure of the contact surface decreases, and the friction decreases or even disappears). As a result, the torque cannot be reliably transmitted, which in turn causes circumferential slippage between the rotor core and the spoke shaft, leading to transmission failure.

[0003] 2. Structural damage caused by increased interference fit: In engineering, to resist centrifugal deformation, the assembly method of blindly increasing the interference fit is often adopted. This will cause the core laminations to generate extremely high pre-stress, which can easily exceed the yield strength of the silicon steel sheet material, causing irreversible plastic deformation of the laminations, or even cracking and damage, severely reducing the service life of the rotor.

[0004] 3. Frequent start-stop wear with no compensation capability: During the long-term repeated start-stop process of the motor, there is fretting friction wear between the rotor core and the spoke shaft boss, resulting in a continuous increase in the circumferential clearance. Traditional structures do not have the ability to compensate for this clearance, and the continuous accumulation of clearance will cause the rotor core to loosen, leading to excessive vibration of the unit, seriously affecting the stability of equipment operation, and even causing safety accidents. Summary of the Invention

[0005] In view of the defects of existing technologies such as centrifugal torque transmission failure, lamination stress damage, and wear and loosening during start-up and shutdown, this invention aims to provide a novel rotor connection structure that, based on precise concentric positioning and reliable circumferential torque transmission, allows the rotor core to float freely radially under centrifugal force, eliminates pre-stress, and can automatically and in real time compensate for circumferential clearance caused by wear, ensuring high stability and high safety during long-term operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotor connection structure with radial floating and wear clearance self-compensation functions, including a rotating shaft, a rotor core, multiple wedge block assemblies, and multiple anti-loosening compensation assemblies; The rotating shaft is uniformly provided with multiple spokes in the circumferential direction. One end of the top surface of each spoke is provided with a first positioning block, and the other end is provided with a boss extending towards the first positioning block. The top surface of the boss is provided with a second positioning block that can be detachably connected to the first positioning block at the end away from the first positioning block. The rotor core has a through shaft hole at its center, and the inner wall of the shaft hole has multiple grooves evenly distributed around its circumference. The spokes, bosses, grooves, wedge block assemblies, and anti-loosening compensation assemblies correspond one-to-one. The rotating shaft passes through the shaft hole, and the top surface of the spoke plate is connected to the inner wall of the shaft hole; The boss is correspondingly disposed in the groove, and the two side walls of the boss are connected to the groove through a wedge block assembly; The first positioning block and the second positioning block are respectively connected to the two end faces of the rotor core; The anti-loosening compensation component is installed at one end of the boss where the second positioning block is located. One end of the wedge block component is connected to the first positioning block, and the other end is elastically connected to the anti-loosening compensation component. It is used to dynamically adjust the wedge clamping force of the wedge block component when the gap between the boss and the groove changes, so as to ensure the torque transmission between the rotating shaft and the rotor core.

[0007] Furthermore, the wedge block assembly includes two pairs of wedge-shaped key pairs with mutually cooperating inclined surfaces, and both side walls of the boss are connected to the groove through the wedge-shaped key pairs.

[0008] Furthermore, the anti-loosening compensation component includes a locking bolt, a disc spring assembly and a U-shaped pressure plate passing through the locking bolt; The locking bolt is threaded to one end of the boss where the second positioning block is provided, and is used to pre-tighten and compress the disc spring assembly. The bottom surface of the U-shaped pressure plate is connected to the disc spring assembly, and the top surface is connected to the wedge block assembly.

[0009] Furthermore, the anti-loosening compensation component also includes a locking nut, which is threadedly connected to the locking bolt, connected to the boss on one axial side, and has a pre-reserved gap between the other side and the U-shaped pressure plate.

[0010] Furthermore, the gap is less than the maximum compression compensation stroke of the disc spring assembly.

[0011] Furthermore, a spherical washer is provided between the disc spring assembly and the U-shaped pressure plate. One side of the spherical washer is connected to the disc spring assembly, and the other side is in spherical contact with the bottom surface of the U-shaped pressure plate. The top surface of the U-shaped pressure plate is provided with a pair of convex arc surfaces, and the end of the wedge block assembly near the U-shaped pressure plate is provided with a pair of concave arc surfaces. The convex arc surfaces and the concave arc surfaces are tangentially engaged.

[0012] Furthermore, the arrangement of the disc spring assemblies is a paired combination.

[0013] Furthermore, the rotating shaft is evenly provided with eight spokes in the circumference.

[0014] An electric motor, the electric motor including the rotor connection structure described above with radial floating and wear clearance self-compensation functions.

[0015] An assembly method for a rotor connection structure with radial floating and wear clearance self-compensation functions specifically includes the following steps: T1. Align the bosses and grooves one by one in the axial direction, insert the rotating shaft into the shaft hole of the rotor core so that the top surface of the spokes is connected to the inner wall of the shaft hole, and the first positioning block is connected to one side end face of the rotor core. T2. Install a second positioning block on the top surface of the boss, so that the second positioning block is connected to the other end face of the rotor core; T3. From the end of the boss where the second positioning block is located, insert the wedge block assembly to both sides of the boss, so that the end of the wedge block assembly away from the second positioning block is connected to the first positioning block. T4. Finally, install the anti-loosening compensation component on the end of the boss where the second positioning block is located, and make the anti-loosening compensation component elastically connected to the end of the wedge block assembly near the second positioning block to complete the assembly of the rotor connection structure.

[0016] Compared with the prior art, the beneficial effects of the rotor structure, motor and assembly method with floating and wear compensation functions described in this invention are: 1. This invention abandons the traditional interference-friction key connection torque transmission mode and uses a wedge block assembly to achieve a circumferential connection between the boss (shaft) and the groove (rotor core). An anti-loosening compensation component is installed at one end of the boss for axial fixation and pre-tightening of the wedge block assembly. When the rotor core expands radially due to centrifugal force, causing the gap between the groove and the boss to gradually increase, the anti-loosening compensation component can dynamically adjust the wedge tightening force of the wedge block assembly. When the motor is used for a long time and friction wear occurs on the contact surface between the groove and the wedge block assembly, the anti-loosening compensation component can also automatically fill and compensate. This invention can maintain a circumferential gapless connection between the boss and the groove, ensuring torque transmission between the shaft and the rotor core, and completely solving the problems of slippage failure, rotor loosening, and excessive vibration caused by high-speed centrifugal conditions.

[0017] 2. The present invention uses a wedge block assembly to achieve circumferential connection between the boss and the groove. During initial assembly, it is sufficient to ensure that there is no gap in the circumferential direction between the boss, the wedge block assembly and the groove, so that the torque can be transmitted stably. There is no need to significantly increase the interference, which reduces the pre-compression stress of the rotor core laminations and avoids plastic deformation and cracking of the rotor core laminations from the root.

[0018] 3. The anti-loosening compensation component of this invention uses a pre-compressed disc spring assembly as the elastic compensation source. One end of the spherical washer is a flat surface that contacts the disc spring assembly, and the other end is a spherical surface that mates with the spherical surface of the U-shaped pressure plate, giving the U-shaped pressure plate a self-aligning function. The top surface of the U-shaped pressure plate is tangentially fitted to the concave and convex arcs of the wedge block assembly. When the compensation amounts of the wedge key pairs located on both sides of the boss are different, the U-shaped pressure plate can swing around the spherical washer at a certain angle, applying different compensation amounts to the wedge key pairs on both sides of the boss. This invention innovatively designs a structure of "spherical fit + tangential arc fit," which not only ensures the positional stability of the U-shaped pressure plate but also achieves balanced and independent clamping of the wedge key pairs on both sides of the boss.

[0019] 4. The anti-loosening compensation component of the present invention also includes a locking nut, and the reserved gap between the locking nut and the U-shaped pressure plate is smaller than the maximum compression compensation stroke of the disc spring assembly. The locking nut integrates the functions of locking and preventing loosening as well as preventing detachment at the limit gap, which can prevent key components from loosening under extreme wear conditions, providing extremely high operational safety and reliability for high-speed rotors. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of a rotor connection structure with radial floating and wear gap self-compensation functions according to the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a left view of a rotor connection structure with radial floating and wear clearance self-compensation functions as described in this invention; Figure 4 For the present invention Figure 3 Sectional view along line B; Figure 5 This is a schematic diagram of the structure of the rotating shaft described in this invention; Figure 6 For the present invention Figure 5 A magnified view of a section at point C; Figure 7 This is a front view of the rotating shaft described in this invention; Figure 8 This is a schematic diagram of the rotor core described in this invention; Figure 9 This is a left view of the rotor core described in this invention; Figure 10 The explosion view of the wedge block assembly and anti-loosening compensation assembly described in this invention Figure 1 ; Figure 11 The explosion view of the wedge block assembly and anti-loosening compensation assembly described in this invention Figure 2 ; Figure 12 This is a top view of the wedge block assembly and the anti-loosening compensation assembly described in this invention; In the diagram: 1-Shaft; 2-Rotor core; 3-Wedge block assembly; 4-Anti-loosening compensation assembly; 11-Spokes; 21-Groove; 111 - First positioning block; 112 - Boss; 113 - Second positioning block; 41-Locking bolt; 42-Disc spring assembly; 43-U-shaped pressure plate; 44-Locking nut; 45-Spherical washer; 46-Clearance; 431 - Convex circular arc surface; 31 - Concave circular arc surface. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0022] I. Detailed Implementation Method 1, see [link / reference] Figure 1-12 This embodiment describes a rotor connection structure with radial floating and wear clearance self-compensation functions, including a rotating shaft 1, a rotor core 2, multiple wedge block assemblies 3, and multiple anti-loosening compensation assemblies 4. The rotating shaft 1 is uniformly provided with a plurality of spokes 11 in the circumferential direction. One end of the top surface of each spoke 11 is provided with a first positioning block 111, and the other end is provided with a boss 112 extending toward the first positioning block 111. The top surface of the boss 112 away from the first positioning block 111 is provided with a detachably connected second positioning block 113. The top surface of the boss 112 is provided with a slot, and the second positioning block 113 is engaged in the slot. The rotor core 2 has a through shaft hole in the center. The inner wall of the shaft hole is uniformly provided with multiple grooves 21 in the circumferential direction. The spokes 11, bosses 112, grooves 21, wedge block assembly 3, and anti-loosening compensation assembly 4 correspond one-to-one. The width of the groove 21 is greater than the width of the bosses 112 and less than the width of the spokes 11. The length of the groove 21 is less than the length of the bosses 112. The rotating shaft 1 passes through the shaft hole, and the top surface of the spoke 11 is connected to the inner wall of the shaft hole, which is used to fix the rotating shaft 1 and the rotor core 2 coaxially. The boss 112 is correspondingly disposed in the groove 21. The two side walls of the boss 112 are connected to the groove 21 through the wedge block assembly 3, which is used to fix the rotating shaft 1 and the rotor core 2 circumferentially and transmit torque. The opposing surfaces of the first positioning block 111 and the second positioning block 113 are respectively connected to the two end faces of the rotor core 2, which are used to axially fix the rotating shaft 1 and the rotor core 2. The anti-loosening compensation component 4 is installed at one end of the boss 112 where the second positioning block 113 is provided. The boss 112 is provided with a threaded hole. The anti-loosening compensation component 4 is threadedly connected to the boss 112. One end of the wedge block component 3 is connected to the first positioning block 111, and the other end is elastically connected to the anti-loosening compensation component 4. It is used to dynamically adjust the wedge clamping force of the wedge block component 3 when the gap between the rotating shaft 1 and the rotor core 2 changes, so as to ensure the torque transmission between the rotating shaft 1 and the rotor core 2.

[0023] The wedge block assembly 3 includes two pairs of wedge-shaped key pairs with mutually cooperating inclined surfaces, and both side walls of the boss 112 are connected to the groove 21 through the wedge-shaped key pairs.

[0024] The anti-loosening compensation component 4 includes a locking bolt 41, a disc spring assembly 42 and a U-shaped pressure plate 43 passing through the locking bolt 41; The locking bolt 41 is threaded to one end of the boss 112 where the second positioning block 113 is provided, and is used to pre-tighten and compress the disc spring assembly 42. The bottom surface of the U-shaped pressure plate 43 is connected to the disc spring assembly 42, and the top surface is connected to the wedge block assembly 3.

[0025] Preferred options are shown in the appendix. Figure 10 and attached Figure 11 The anti-loosening compensation component 4 also includes a locking nut 44 and a spherical washer 45. After the disc spring assembly 42, spherical washer 45, U-shaped pressure plate 43, and locking nut 44 are sequentially inserted onto the locking bolt 41, the locking bolt 41 is screwed into the threaded hole of the boss 112 to apply axial pressure to the disc spring assembly 42, compressing it to the initial preload required by the design. After the preload force on the wedge block assembly 3 reaches the preset value, the locking nut 44 is tightened to complete the locking and fixing of all components. The locking nut 44 is threadedly connected to the locking bolt 41, with one axial side connected to the boss 112 and the other side having a gap 46 reserved between it and the U-shaped pressure plate 43. The gap 46 is less than the maximum compression compensation stroke of the disc spring assembly 42.

[0026] One side of the spherical washer 45 is a flat surface that fits into the disc spring assembly 42, while the other side is a spherical surface that mates with a spherical recess on the bottom surface of the U-shaped pressure plate 43. This spherical mating structure allows the U-shaped pressure plate 43 to swing slightly around the spherical washer 45 for self-alignment, ensuring a uniform distribution of the clamping force applied to the wedge-shaped key pairs on both sides of the boss 112. The top surface of the U-shaped pressure plate 43 is provided with a pair of convex arc surfaces 431, and the end of the wedge block assembly 3 near the U-shaped pressure plate 43 is provided with a pair of concave arc surfaces 31. The radius of the convex arc surface 431 is smaller than the radius of the concave arc surface 31, and the convex arc surface 431 and the concave arc surface 31 are tangentially mated.

[0027] The disc spring assembly 42 is arranged in a paired combination.

[0028] The rotating shaft 1 is evenly provided with eight spokes 11 around its circumference.

[0029] An electric motor includes the rotor connection structure described above, which has radial floating and wear clearance self-compensation functions.

[0030] The first positioning block 111 and the boss 112 are integrally formed with the spoke plate 11. The top surface of the boss 112 is machined with a slot, and multiple grooves 21 are uniformly machined circumferentially on the inner wall of the shaft hole of the rotor core 2.

[0031] An assembly method for a rotor connection structure with radial floating and wear clearance self-compensation functions specifically includes the following steps: T1. Align the boss 112 with the groove 21 one by one in the axial direction, insert the rotating shaft 1 into the shaft hole of the rotor core 2 so that the top surface of the spoke 11 is connected to the inner wall of the shaft hole, and the first positioning block 111 is connected to one side end face of the rotor core 2 to complete the coaxial fixation of the rotating shaft 1 and the rotor core 2. T2. Install the second positioning block 113 on the top surface of the boss 112, so that the second positioning block 113 is connected to the other end face of the rotor core 2, thus completing the axial fixation of the rotating shaft 1 and the rotor core 2. T3. From one end of the boss 112 where the second positioning block 113 is provided, wedge block assemblies 3 are installed on both sides of the boss 112, so that the end of the wedge block assembly 3 away from the second positioning block 113 is connected to the first positioning block 111. T4. Finally, install the anti-loosening compensation component 4 on the end of the boss 112 where the second positioning block 113 is located, and make the anti-loosening compensation component 4 elastically connected to the end of the wedge block component 3 near the second positioning block 113, so as to fix the rotating shaft 1 and the rotor core 2 circumferentially and complete the assembly of the rotor connection structure.

[0032] The working principle of this invention is as follows: 1. Dynamic compensation during operation: When the motor is running at high speed, the rotor core 2 expands radially under centrifugal force. When this causes the gap between the groove 21 and the boss 112 to increase, the disc spring assembly 42 of the anti-loosening compensation component 4 releases its pre-tight compression, sequentially pushing the spherical washer 45, the U-shaped pressure plate 43, and the wedge block assembly 3, increasing the wedge clamping force of the wedge block assembly 3, maintaining a circumferential gapless connection between the groove 21 and the boss 112, and ensuring torque transmission between the shaft 1 and the rotor core 2; after the motor stops, the rotor core 2 recovers its contraction, causing the gap between the groove 21 and the boss 112 to decrease, pushing the wedge block assembly 3 to act in the opposite direction on the anti-loosening compensation component 4, restoring the pre-tight compression of the disc spring assembly 42.

[0033] 2. Compensation for Wear: Under frequent start-stop cycles of the motor, the radial deformation and recovery of the rotor core 2 under centrifugal force cause slight wear and circumferential gaps at the contact surfaces of the groove 21 and the wedge block assembly 3. At this time, the disc spring group 42 of the anti-loosening compensation component 4 releases its pre-tight compression, sequentially pushing the spherical washer 45, the U-shaped pressure plate 43, and the wedge block assembly 3 axially forward, filling the wear gaps in real time, maintaining the gapless transmission state between the groove 21 and the wedge block assembly 3, and achieving self-alignment of the U-shaped pressure plate 43 by relying on the spherical pair formed by the spherical washer 45, applying stable and balanced clamping forces to the wedge key pairs on both sides of the boss 112, ensuring reliable torque transmission between the shaft 1 and the rotor core 2.

[0034] 3. Extreme protection state: When the wear of the motor increases abnormally due to prolonged operation and exceeds the normal compensation limit of the pre-tightening compression of the disc spring assembly 42, the U-shaped pressure plate 43 is pressed against the locking nut 44 because the gap 46 between the U-shaped pressure plate 43 and the locking nut 44 is smaller than the maximum compression compensation stroke of the disc spring assembly 42. However, at this time, the disc spring assembly 42 still applies axial pre-tightening force to the wedge block assembly 3 through the U-shaped pressure plate 43, which effectively prevents the U-shaped pressure plate 43 from axially loosening and breaking off from the wedge block assembly 3, causing the wedge block assembly 3 to fall off. This achieves fault fallback protection and ensures that the unit can be safely shut down for maintenance.

[0035] The present invention discloses a rotor structure, motor and assembly method with floating and wear compensation functions, which has the functions of radial floating of rotor core, spherical pressing and automatic clearance compensation of disc spring, and is particularly suitable for motors under frequent start-stop and high speed conditions.

[0036] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A rotor connection structure with radial floating and wear clearance self-compensation functions, characterized in that, It includes a rotating shaft (1), a rotor core (2), multiple wedge block assemblies (3), and multiple anti-loosening compensation assemblies (4); The rotating shaft (1) is uniformly provided with multiple spokes (11) in the circumferential direction. One end of the top surface of the spoke (11) is provided with a first positioning block (111), and the other end is provided with a boss (112) extending in the direction close to the first positioning block (111). The top surface of the boss (112) away from the first positioning block (111) is provided with a second positioning block (113) that can be detachably connected. The rotor core (2) has a through shaft hole in the center, and the inner wall of the shaft hole is uniformly provided with multiple grooves (21) in the circumferential direction. The spokes (11), bosses (112), grooves (21), wedge block assembly (3), and anti-loosening compensation assembly (4) correspond one to one. The rotating shaft (1) passes through the shaft hole, and the top surface of the spoke (11) is connected to the inner wall of the shaft hole; The boss (112) is correspondingly disposed in the groove (21), and the two side walls of the boss (112) are connected to the groove (21) through the wedge block assembly (3); The first positioning block (111) and the second positioning block (113) are respectively connected to the two end faces of the rotor core (2); The anti-loosening compensation component (4) is installed at one end of the boss (112) where the second positioning block (113) is located. One end of the wedge block component (3) is connected to the first positioning block (111), and the other end is elastically connected to the anti-loosening compensation component (4). It is used to dynamically adjust the wedge clamping force of the wedge block component (3) to ensure the torque transmission between the rotating shaft (1) and the rotor core (2).

2. The rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 1, characterized in that, The wedge block assembly (3) includes two pairs of wedge key pairs with mutually cooperating inclined surfaces, and both sides of the boss (112) are connected to the groove (21) through the wedge key pairs.

3. The rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 1, characterized in that, The anti-loosening compensation component (4) includes a locking bolt (41), a disc spring assembly (42) and a U-shaped pressure plate (43) passing through the locking bolt (41); The locking bolt (41) is threaded to one end of the boss (112) which is provided with a second positioning block (113), for pre-compressing the disc spring assembly (42); The bottom surface of the U-shaped pressure plate (43) is connected to the disc spring assembly (42), and the top surface is connected to the wedge block assembly (3).

4. A rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 3, characterized in that, The anti-loosening compensation component (4) also includes a locking nut (44), which is threadedly connected to the locking bolt (41), connected to the boss (112) on one side in the axial direction, and has a gap (46) reserved between the other side and the U-shaped pressure plate (43).

5. A rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 4, characterized in that, The gap (46) is less than the maximum compression compensation stroke of the disc spring assembly (42).

6. A rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 3, characterized in that, A spherical washer (45) is provided between the disc spring assembly (42) and the U-shaped pressure plate (43). One side of the spherical washer (45) is connected to the disc spring assembly (42), and the other side is in spherical fit with the bottom surface of the U-shaped pressure plate (43). The top surface of the U-shaped pressure plate (43) is provided with a pair of convex arc surfaces (431). The wedge block assembly (3) is provided with a pair of concave arc surfaces (31) at one end near the U-shaped pressure plate (43). The convex arc surface (431) and the concave arc surface (31) are tangentially fitted.

7. A rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 3, characterized in that, The disc spring assembly (42) is arranged in a paired combination.

8. A rotor connection structure with radial floating and wear clearance self-compensation functions according to claim 1, characterized in that, The rotating shaft (1) is evenly provided with eight spokes (11) in the circumference.

9. An electric motor, characterized in that, The motor includes a rotor connection structure with radial floating and wear clearance self-compensation functions as described in any one of claims 1 to 8.

10. An assembly method for a rotor connection structure with radial floating and wear clearance self-compensation functions as described in any one of claims 1 to 8, characterized in that, Specifically, it includes the following steps: T1. In the axial direction, the boss (112) and the groove (21) are aligned one by one. The rotating shaft (1) is inserted into the shaft hole of the rotor core (2) so that the top surface of the spoke (11) is connected to the inner wall of the shaft hole. The first positioning block (111) is connected to one side end face of the rotor core (2). T2. Install a second positioning block (113) on the top surface of the boss (112) so that the second positioning block (113) is connected to the other end face of the rotor core (2); T3. From one end of the boss (112) where the second positioning block (113) is provided, insert the wedge block assembly (3) into both sides of the boss (112) so that the end of the wedge block assembly (3) away from the second positioning block (113) is connected to the first positioning block (111). T4. Finally, install the anti-loosening compensation component (4) on the end of the boss (112) with the second positioning block (113), and make the anti-loosening compensation component (4) elastically connected to the end of the wedge block component (3) near the second positioning block (113) to complete the assembly of the rotor connection structure.

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