Rotor assembly of permanent magnet synchronous motor and permanent magnet synchronous motor

Abstract

The invention relates to the technical field of motors, discloses a rotor assembly of a permanent magnet synchronous motor and the permanent magnet synchronous motor, and solves the problem that a rotating shaft and a bearing are inconvenient to take out from a motor shell. The two ends of the rotating shaft are sleeved with supporting rings respectively, bearings are arranged in the supporting rings and are in interference connection with the rotating shaft, and supporting shells are arranged on the sides, facing the rotor part, of the supporting rings. The inner wall of the supporting shell and the supporting ring are connected through a plurality of connecting columns, the supporting shell is provided with a clamping and positioning assembly used for clamping and positioning a bearing, and the supporting shell is provided with a dismounting and mounting mechanism used for being fixedly connected with a motor shell. And the rotating shaft and the bearing are convenient to replace, and later maintenance and use are convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a rotor assembly of a permanent magnet synchronous motor and a permanent magnet synchronous motor. Background Art

[0002] The motor consists of a rotor, a stator, a housing and a cover. The motor rotor includes a rotating shaft, on which bearings are installed. The bearings are interference-connected in the motor housing. However, it is worth considering that some rotors have uneven mass distribution or axial eccentricity, which causes the rotor to generate a chronic torque due to centrifugal force when rotating, causing the rotating shaft to deflect, resulting in rotor imbalance and eccentric motion of the motor. This causes bearing wear and bending of the rotating shaft in the permanent magnet synchronous motor after long-term operation, resulting in misalignment of the stator and rotor, so that the bearings are stuck in the motor housing. When repairing the motor, it is inconvenient to remove the rotating shaft and bearings from the motor housing, which increases the difficulty of repair and is not convenient for promotion and use.

[0003] Therefore, in order to solve the above problems, a related facility that is more in line with usage needs needs to emerge. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a rotor assembly of a permanent magnet synchronous motor and a permanent magnet synchronous motor, which effectively solves the problem in the above background technology that it is inconvenient to remove the rotating shaft and bearings from the motor housing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotor assembly for a permanent magnet synchronous motor, comprising a rotating shaft and a rotor portion, wherein the rotor portion is fixedly sleeved on the exterior of the rotating shaft, support rings are sleeved on both ends of the rotating shaft, bearings are provided within the support rings, and the bearings are interference-connected to the rotating shaft, and a support shell is provided on the side of the support ring facing the rotor portion;

[0006] The inner wall of the support shell and the support ring are connected by a plurality of connecting columns. The support shell is equipped with a clamping and positioning assembly for clamping and positioning the bearing. The support shell is equipped with a disassembly and assembly mechanism for fixed connection with the motor housing.

[0007] Preferably, the clamping and positioning assembly includes a support sleeve fixedly installed in the support shell, a threaded ring is provided in the support sleeve, a thread matching the threaded ring is provided on the inner wall of the support sleeve, a movable ring is fixedly connected to the side of the threaded ring away from the rotor part, and the support shell is installed with a positioning unit for positioning the movable ring position, a plurality of grooves are provided on the inner wall of the support ring, a clamping plate for pressing the bearing is provided in the groove, a through hole is provided on the inner wall of the groove away from the bearing, a second movable block is fixedly installed on the clamping plate, and an end of the second movable block away from the clamping plate is located in the through hole, a first movable block is provided in the through hole, the first movable block and the second movable block are connected by a first compression spring, a protrusion is fixedly connected to the side of the first movable block away from the second movable block, an inclined surface is provided on the inner wall of the movable ring, and the protrusion is in contact with the inclined surface on the movable ring, a plurality of support blocks are fixedly connected to the side of the support ring facing the rotor part, and the support block is in contact with the bearing.

[0008] Preferably, the positioning unit includes at least three first movable plates arranged in the supporting shell, and a plurality of first rectangular holes are opened on the inner wall of the supporting sleeve, the number of the first rectangular holes and the first movable plates is the same, and the end of the first movable plate passes through the corresponding first rectangular hole, and a second movable plate is provided on the side of the first movable plate facing the movable ring, and a screw rod and a guide column pass through the second movable plate, and the connection mode of the screw rod and the second movable plate is a threaded connection, the guide column passes through the first movable plate, the screw rod and the first movable plate are rotatably connected, and the guide column is fixedly connected to the inner wall of the supporting shell, and a plurality of limiting grooves are opened on the side of the movable ring facing the rotor part, and the second movable plate is fixedly connected to the limiting plate on the side facing the movable ring, and the limiting plate is located in one of the corresponding limiting grooves.

[0009] Preferably, one end of the screw rod away from the first movable plate is fixedly connected to a turntable, and one side of the movable ring away from the threaded ring is fixedly connected to a plurality of first handles.

[0010] Preferably, an iron plate is fixedly connected to a side of the clamping plate away from the bearing, and a magnet adapted to the iron plate is fixedly connected to the inner wall of the groove.

[0011] Preferably, a plurality of first connecting shafts are provided in the support shell, and the number of the first connecting shafts and the first movable plate is the same, the external fixed sleeve of the first connecting shaft is provided with a roller in contact with the rotating shaft, the external rotating sleeve of the first connecting shaft is provided with a support frame, the support shell is equipped with a guide for limiting the position of the support frame, a worm is provided on the side of the support frame away from the rotating shaft, the worm and the support shell are rotatably connected, a second connecting shaft is provided between the worm and the support frame, the external fixed sleeve of the second connecting shaft is provided with a worm gear and a cam, and the worm gear and the worm gear are meshed, the cam is in contact with the support frame, the external rotating sleeve of the second connecting shaft is provided with a support plate, and the support plate is fixedly connected to the inner wall of the support shell, the support plate is fixedly installed with a stop plate for limiting the position of the cam, and a transmission adapted to the threaded ring is installed in the support shell.

[0012] Preferably, the transmission includes a first damping plate fixedly mounted on the end of the worm, a second damping plate is provided on the side of the first damping plate away from the worm, a third connecting shaft is fixedly connected to the side of the second damping plate away from the first damping plate, the third connecting shaft and the support ring are rotatably connected, an external fixed sleeve of the third connecting shaft is provided with a gear, a plurality of gear teeth meshing with the gear are fixedly connected to the inner wall of the threaded ring, a fixed ring is provided on the external fixed sleeve of the worm, a plurality of positioning holes are opened on the fixed ring, a positioning column is fixedly connected to the side of the first movable plate away from the second movable plate, and the positioning column is located in one of the corresponding positioning holes.

[0013] Preferably, the guide member includes a fixing plate fixedly mounted on the support frame, the fixing plate is penetrated by the guide plate, and both ends of the guide plate are fixedly connected to the inner wall of the support shell through the connecting plate.

[0014] Preferably, the disassembly and assembly mechanism includes fixed blocks respectively fixedly mounted on the outer walls on both sides of the supporting shell, a mounting plate is provided on the side of the fixed block away from the supporting shell, a slide groove is provided on the side of the fixed block facing the mounting plate, a slot is provided on the side of the mounting plate facing the fixed block, an insert block is provided in the slide groove, one end of the insert block is located in the corresponding slot, the other end of the insert block is connected to the inner wall of the slide groove by a second compression spring, a second rectangular hole is provided on the inner wall of the slide groove, a second handle is fixedly mounted on the insert block, and the second handle passes through the second rectangular hole.

[0015] The present invention also provides a permanent magnet synchronous motor, which comprises: a stator assembly and the above-mentioned rotor assembly, wherein the rotor assembly is arranged inside the stator assembly.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The support shell is fixedly connected to the motor housing through a disassembly and assembly mechanism, and the bearing is fixed by a clamping and positioning assembly so that the bearing is fixedly installed in the support ring. When the bearing and the rotating shaft need to be removed, the fixed relationship between the support shell and the motor housing is released through the disassembly and assembly mechanism, and the staff drives the support shell, support ring and bearing to slide relative to the rotating shaft to pull the bearing out from the outside of the rotating shaft. The clamping and positioning of the bearing position is released through the clamping and positioning assembly, and the staff drives the bearing out of the support ring, which is convenient for replacing the rotating shaft and bearing and convenient for later maintenance and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] In the attached figure:

[0020] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0021] Figure 2 This is a schematic structural diagram of the support shell of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the support sleeve of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the screw rod of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the threaded ring of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the guide member of the present invention;

[0026] Figure 7 It is a schematic structural diagram of a cross-section of a fixing block of the present invention;

[0027] Figure 8 This is a schematic diagram of the cross-section structure of the support ring of the present invention;

[0028] Figure 9 For the present invention Figure 8 A local enlarged schematic diagram of point A in the middle.

[0029] In the figure: 1. rotating shaft; 2. rotor; 3. support ring; 4. bearing; 5. support block; 6. support shell; 7. connecting column; 8. support sleeve; 9. threaded ring; 10. movable ring; 11. groove; 12. clamping plate; 13. through hole; 14. first movable block; 15. protrusion; 16. second movable block; 17. first compression spring; 18. magnet; 19. iron plate; 20. first handle; 21. first movable plate; 22. first rectangular hole; 23. second movable plate; 24. guide column; 25. screw rod; 26. limit plate; 27. turntable; 28. limit slot; 29. First connecting shaft; 30. Roller; 31. Support frame; 32. Worm; 33. Second connecting shaft; 34. Worm gear; 35. Support plate; 36. Cam; 37. First damping disc; 38. Third connecting shaft; 39. Second damping disc; 40. Gear; 41. Fixing plate; 42. Guide plate; 43. Connecting plate; 44. Fixing ring; 45. Positioning hole; 46. Positioning column; 47. Stop plate; 48. Fixing block; 49. Mounting plate; 50. Slide groove; 51. Slot; 52. Insert block; 53. Second compression spring; 54. Second handle; 55. Second rectangular hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Embodiment 1, by Figure 1 and Figure 2 The present invention includes a rotating shaft 1 and a rotor part 2. The rotor part 2 is fixedly sleeved on the outside of the rotating shaft 1. Support rings 3 are sleeved on both ends of the rotating shaft 1. Bearings 4 are arranged in the support rings 3. The bearings 4 and the rotating shaft 1 are interference-connected. A support shell 6 is provided on the side of the support ring 3 facing the rotor part 2.

[0032] The inner wall of the support shell 6 and the support ring 3 are connected by several connecting columns 7. The support shell 6 is equipped with a clamping and positioning assembly for clamping and positioning the bearing 4, and the support shell 6 is equipped with a disassembly and assembly mechanism for fixed connection with the motor housing; the support shell 6 is fixedly connected to the motor housing through the disassembly and assembly mechanism, and the bearing 4 is fixed by the clamping and positioning assembly so that the bearing 4 is fixedly installed in the support ring 3. When the bearing 4 and the rotating shaft 1 need to be removed, the fixed relationship between the support shell 6 and the motor housing is released by the disassembly and assembly mechanism, and the staff drives the support shell 6, the support ring 3 and the bearing 4 to slide relative to the rotating shaft 1 so that the bearing 4 is pulled out from the outside of the rotating shaft 1, and the clamping and positioning of the bearing 4 position is released by the clamping and positioning assembly. The staff drives the bearing 4 out of the support ring 3, which is convenient for replacing the rotating shaft 1 and the bearing 4, and convenient for later maintenance and use.

[0033] Example 2, based on Example 1, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9It is given that the clamping and positioning assembly includes a support sleeve 8 fixedly installed in the support shell 6, a threaded ring 9 is provided in the support sleeve 8, a thread matching the threaded ring 9 is provided on the inner wall of the support sleeve 8, a movable ring 10 is fixedly connected to the side of the threaded ring 9 away from the rotor part 2, and the support shell 6 is installed with a positioning unit for locating the position of the movable ring 10, a plurality of grooves 11 are provided on the inner wall of the support ring 3, a clamping plate 12 for pressing the bearing 4 is provided in the groove 11, a through hole 13 is provided on the inner wall of the groove 11 away from the bearing 4, and a second movable block 16 is fixedly installed on the clamping plate 12, and The end of the second movable block 16 away from the clamping plate 12 is located in the through hole 13, and a first movable block 14 is provided in the through hole 13. The first movable block 14 and the second movable block 16 are connected by a first compression spring 17. A protrusion 15 is fixedly connected to the side of the first movable block 14 away from the second movable block 16. An inclined surface is provided on the inner wall of the movable ring 10, and the protrusion 15 is in contact with the inclined surface on the movable ring 10. A plurality of support blocks 5 are fixedly connected to the side of the support ring 3 facing the rotor part 2, and the support block 5 is in contact with the bearing 4. The positioning unit includes at least three first movable blocks 14 arranged in the support shell 6. A movable plate 21, a plurality of first rectangular holes 22 are opened on the inner wall of the support sleeve 8, the number of the first rectangular holes 22 and the first movable plate 21 is the same, and the end of the first movable plate 21 passes through the corresponding first rectangular hole 22, the first movable plate 21 is provided with a second movable plate 23 on the side facing the movable ring 10, the second movable plate 23 is penetrated by a screw rod 25 and a guide column 24, the screw rod 25 and the second movable plate 23 are connected by a threaded connection, the guide column 24 passes through the first movable plate 21, the screw rod 25 and the first movable plate 21 are rotatably connected, and the guide column 24 and the support The inner wall of the shell 6 is fixedly connected, a plurality of limiting grooves 28 are opened on the side of the movable ring 10 facing the rotor part 2, the second movable plate 23 is fixedly connected to the limiting plate 26 on the side facing the movable ring 10, and the limiting plate 26 is located in one of the corresponding limiting grooves 28, the end of the screw rod 25 away from the first movable plate 21 is fixedly connected to the turntable 27, the side of the movable ring 10 away from the threaded ring 9 is fixedly connected to a plurality of first handles 20, the side of the clamping plate 12 away from the bearing 4 is fixedly connected to the iron plate 19, and the inner wall of the groove 11 is fixedly connected to the magnet 18 adapted to the iron plate 19;

[0034] When the bearing 4 is located in the support ring 3, the bearing 4 and the support block 5 are in contact. The staff holds the first handle 20 and drives the first handle 20 and the movable ring 10 to rotate, so that the movable ring 10 drives the threaded ring 9 to move relative to the support sleeve 8. The inclined surface on the movable ring 10 pushes the protrusion 15 to move toward the bearing 4. The protrusion 15 pushes the clamping plate 12 to fit tightly against the bearing 4 through the first movable block 14, the first compression spring 17 and the second movable block 16. The iron plate 19 does not contact the magnet 18. As the movable ring 10 continues to move, the distance between the first movable block 14 and the second movable block 16 is increased. The first compression spring 17 is deformed, and the first compression spring 17 applies pressure to the second movable block 16 and the clamping plate 12. Several clamping plates 12 clamp the bearing 4 to fix the bearing 4 relative to the support ring 3. The staff drives the turntable 27 and the screw rod 25 to rotate. The screw rod 25 drives the second movable plate 23 and the limit plate 26 to move. The second movable plate 23 slides relative to the guide column 24, increasing the distance between the first movable plate 21 and the second movable plate 23. When the limit plate 26 is inserted into a corresponding limit groove 28, the second movable plate 23 is away from the side of the first movable plate 21 and the movable ring 10. When the first movable plate 21 is in contact with the second movable plate 23, the side thereof is in contact with the inner wall of the first rectangular hole 22. The position of the movable ring 10 and the threaded ring 9 is limited by the limiting plate 26 to prevent the threaded ring 9 and the movable ring 10 from rotating relative to the support sleeve 8 and the support shell 6 due to non-human factors. When the bearing 4 needs to be removed, the staff drives the turntable 27 and the screw rod 25 in the reverse direction to rotate so that the second movable plate 23 moves toward the first movable plate 21. The limiting plate 26 disengages from the limiting groove 28. When the distance between the second movable plate 23 and the first movable plate 21 is restored to the initial distance, the movable ring 10 is released. Due to the limitation of the position, the staff drives the movable ring 10 to rotate in the opposite direction so that the inner wall of the movable ring 10 no longer presses the protrusion 15, and the magnet 18 applies magnetic force to the iron plate 19 to make the iron plate 19 and the magnet 18 close to each other. The clamping plate 12 is no longer close to the bearing 4, and the fixed relationship between the bearing 4 and the support ring 3 can be released. The staff drives the support shell 6 and the support ring 3 to move in the direction away from the rotor part 2. The support ring 3 supports the bearing 4 through the support block 5, so that the bearing 4 follows the support ring 3 to detach from the rotating shaft 1, and then the staff takes the bearing 4 out of the support ring 3 to complete the removal of the bearing 4.

[0035] Example 3, based on Example 2, Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7It is given that a plurality of first connecting shafts 29 are provided in the support shell 6, and the number of the first connecting shafts 29 and the first movable plate 21 is the same, the outer fixed sleeve of the first connecting shaft 29 is provided with a roller 30 in contact with the rotating shaft 1, the outer rotating sleeve of the first connecting shaft 29 is provided with a support frame 31, the support shell 6 is installed with a guide for limiting the position of the support frame 31, the side of the support frame 31 away from the rotating shaft 1 is provided with a worm 32, the worm 32 and the support shell 6 are rotatably connected, a second connecting shaft 33 is provided between the worm 32 and the support frame 31, the outer fixed sleeve of the second connecting shaft 33 is provided with a worm gear 34 and a cam 36, and the worm gear 34 and the worm 32 meshes with each other, the cam 36 contacts the support frame 31, the outer rotating sleeve of the second connecting shaft 33 is provided with a support plate 35, and the support plate 35 is fixedly connected to the inner wall of the support shell 6, the support plate 35 is fixedly installed with a stop plate 47 for limiting the position of the cam 36, and a transmission device adapted to the threaded ring 9 is installed in the support shell 6, the transmission device includes a first damping disk 37 fixedly installed at the end of the worm 32, the first damping disk 37 is contacted with a second damping disk 39 on the side away from the worm 32, and the second damping disk 39 is fixedly connected to the third connecting shaft 38 on the side away from the first damping disk 37, and the third connecting shaft 38 and the support ring 3 are rotated. The outer fixing sleeve of the third connecting shaft 38 is provided with a gear 40, and the inner wall of the threaded ring 9 is fixedly connected with a plurality of gear teeth meshing with the gear 40. The outer fixing sleeve of the worm 32 is provided with a fixing ring 44, and a plurality of positioning holes 45 are opened on the fixing ring 44. The first movable plate 21 is fixedly connected with a positioning column 46 on the side away from the second movable plate 23, and the positioning column 46 is located in one of the corresponding positioning holes 45. The guide member includes a fixing plate 41 fixedly mounted on the support frame 31, and a guide plate 42 is passed through the fixing plate 41. The two ends of the guide plate 42 are fixedly connected to the inner wall of the support shell 6 through the connecting plate 43. The mounting mechanism includes a fixing block 48 fixedly mounted on the outer walls of both sides of the support shell 6, a mounting plate 49 is provided on the side of the fixing block 48 away from the support shell 6, a slide groove 50 is provided on the side of the fixing block 48 facing the mounting plate 49, a slot 51 is provided on the side of the mounting plate 49 facing the fixing block 48, an insert block 52 is provided in the slide groove 50, one end of the insert block 52 is located in the corresponding slot 51, the other end of the insert block 52 is connected to the inner wall of the slide groove 50 by a second compression spring 53, a second rectangular hole 55 is provided on the inner wall of the slide groove 50, a second handle 54 is fixedly mounted on the insert block 52, and the second handle 54 passes through the second rectangular hole 55;

[0036] When the staff drives the movable ring 10 and the threaded ring 9 to rotate, the gear teeth on the inner wall of the threaded ring 9 drive the gear 40 and the third connecting shaft 38 to rotate synchronously, and the gear teeth on the threaded ring 9 slide relative to the gear 40, and the third connecting shaft 38 drives the second damping plate 39 to rotate, and the second damping plate 39 can drive the first damping plate 37 and the worm 32 to rotate through the friction force, and the worm 32 drives the second connecting shaft 33 to rotate through the worm gear 34, and the second connecting shaft 33 pushes the support frame 31 and the roller 30 toward the rotating shaft 1 through the cam 36, and the support frame 31 drives the fixed plate 41 to slide relative to the guide plate 42 and the connecting plate 43. The design of the connecting plate 43 allows the support frame 31 to slide smoothly. When the roller 30 contacts the rotating shaft 1, as the second damping plate 39 continues to rotate, the second damping plate 39 cannot drive the first damping plate 37 and the worm 32 to rotate by friction, so that the roller 30 automatically stops when it contacts the rotating shaft 1. When there is no need to drive the movable ring 10 to rotate, so that the first movable plate 21 is away from the side of the second movable plate 23 and contacts the inner wall of the first rectangular hole 22, the positioning column 46 is inserted into the corresponding positioning hole 45 at this time to fix the fixing ring 44 and the worm 32 relative to the support shell 6, so as to avoid the support frame 31 relative to the support shell 6 due to non-human factors. The position of the bearing 4 changes, and when the rotating shaft 1 rotates, the rotating shaft 1 is supported by several rollers 30, which reduces the possibility of bending and deformation of the rotating shaft 1 and improves the stability of the rotating shaft 1 during rotation. When the movable ring 10 rotates in the opposite direction, so that the several clamping plates 12 no longer clamp the bearing 4, the second damping plate 39 drives the first damping plate 37 to rotate in the opposite direction through friction, so that the cam 36 rotates in the opposite direction, and the cam 36 no longer presses the support frame 31, so that the roller 30 no longer presses the rotating shaft 1. When the cam 36 contacts the stop plate 47, the cam 36 stops rotating in the opposite direction. As the movable ring 10 continues to rotate, the second damping plate 39 is no longer The method drives the first damping disc 37 to rotate in the opposite direction through friction, and the cam 36 stops after rotating to the preset position. The staff fixes the mounting plate 49 on the inner wall of the motor housing. When it is necessary to release the fixed relationship between the support shell 6 and the motor housing, the staff drives the second handle 54 and the plug block 52 to move, and the second compression spring 53 is in a compressed state to make the end of the plug block 52 disengage from the slot 51, so that the fixed relationship between the mounting plate 49 and the fixed block 48 can be released. The staff drives the support shell 6 and the fixed block 48 to move horizontally, and the fixed block 48 is no longer located on one side of the mounting plate 49, so that the fixed relationship between the support shell 6 and the motor housing can be released.

[0037] A permanent magnet synchronous motor of this embodiment includes: a stator assembly and the above-mentioned rotor assembly, wherein the rotor assembly is arranged inside the stator assembly.

[0038] Working principle: During operation, the rotor assembly is arranged inside the stator assembly, and the support shell 6 is fixedly connected to the motor housing through a disassembly and assembly mechanism, and the bearing 4 is fixed by the clamping and positioning assembly so that the bearing 4 is fixedly installed in the support ring 3. When the bearing 4 and the rotating shaft 1 need to be dismantled, the fixed relationship between the support shell 6 and the motor housing is released by the disassembly and assembly mechanism, and the staff drives the support shell 6, the support ring 3 and the bearing 4 to slide relative to the rotating shaft 1 so that the bearing 4 is pulled out from the outside of the rotating shaft 1, and the clamping and positioning of the bearing 4 position is released by the clamping and positioning assembly. The staff drives the bearing 4 out of the support ring 3, which is convenient for replacing the rotating shaft 1 and the bearing 4, and is convenient for later maintenance and use;

[0039] When the bearing 4 is located in the support ring 3, the bearing 4 and the support block 5 are in contact. The staff holds the first handle 20 and drives the first handle 20 and the movable ring 10 to rotate, so that the movable ring 10 drives the threaded ring 9 to move relative to the support sleeve 8. The inclined surface on the movable ring 10 pushes the protrusion 15 to move toward the bearing 4. The protrusion 15 pushes the clamping plate 12 to fit tightly against the bearing 4 through the first movable block 14, the first compression spring 17 and the second movable block 16. The iron plate 19 does not contact the magnet 18. As the movable ring 10 continues to move, the distance between the first movable block 14 and the second movable block 16 is increased. The first compression spring 17 is deformed, and the first compression spring 17 applies pressure to the second movable block 16 and the clamping plate 12. Several clamping plates 12 clamp the bearing 4 to fix the bearing 4 relative to the support ring 3. The staff drives the turntable 27 and the screw rod 25 to rotate. The screw rod 25 drives the second movable plate 23 and the limit plate 26 to move. The second movable plate 23 slides relative to the guide column 24, increasing the distance between the first movable plate 21 and the second movable plate 23. When the limit plate 26 is inserted into a corresponding limit groove 28, the second movable plate 23 is away from the side of the first movable plate 21 and the movable ring 10. When the first movable plate 21 is in contact with the second movable plate 23, the side thereof is in contact with the inner wall of the first rectangular hole 22. The position of the movable ring 10 and the threaded ring 9 is limited by the limiting plate 26 to prevent the threaded ring 9 and the movable ring 10 from rotating relative to the support sleeve 8 and the support shell 6 due to non-human factors. When the bearing 4 needs to be removed, the staff drives the turntable 27 and the screw rod 25 in the reverse direction to rotate so that the second movable plate 23 moves toward the first movable plate 21. The limiting plate 26 disengages from the limiting groove 28. When the distance between the second movable plate 23 and the first movable plate 21 is restored to the initial distance, the movable ring 10 is released. According to the limitation of the position, the staff drives the movable ring 10 to rotate in the opposite direction so that the inner wall of the movable ring 10 no longer presses the protrusion 15, and the magnet 18 applies magnetic force to the iron plate 19 to make the iron plate 19 and the magnet 18 close to each other. The clamping plate 12 is no longer in close contact with the bearing 4, and the fixed relationship between the bearing 4 and the support ring 3 can be released. The staff drives the support shell 6 and the support ring 3 to move in the direction away from the rotor part 2. The support ring 3 supports the bearing 4 through the support block 5, so that the bearing 4 follows the support ring 3 out of the rotating shaft 1, and then the staff takes the bearing 4 out of the support ring 3 to complete the removal of the bearing 4;

[0040] When the staff drives the movable ring 10 and the threaded ring 9 to rotate, the gear teeth on the inner wall of the threaded ring 9 drive the gear 40 and the third connecting shaft 38 to rotate synchronously, and the gear teeth on the threaded ring 9 slide relative to the gear 40, and the third connecting shaft 38 drives the second damping plate 39 to rotate, and the second damping plate 39 can drive the first damping plate 37 and the worm 32 to rotate through the friction force, and the worm 32 drives the second connecting shaft 33 to rotate through the worm gear 34, and the second connecting shaft 33 pushes the support frame 31 and the roller 30 toward the rotating shaft 1 through the cam 36, and the support frame 31 drives the fixed plate 41 to slide relative to the guide plate 42 and the connecting plate 43. The design of the connecting plate 43 allows the support frame 31 to slide smoothly. When the roller 30 contacts the rotating shaft 1, as the second damping plate 39 continues to rotate, the second damping plate 39 cannot drive the first damping plate 37 and the worm 32 to rotate by friction, so that the roller 30 automatically stops when it contacts the rotating shaft 1. When there is no need to drive the movable ring 10 to rotate, so that the first movable plate 21 is away from the side of the second movable plate 23 and contacts the inner wall of the first rectangular hole 22, the positioning column 46 is inserted into the corresponding positioning hole 45 at this time to fix the fixing ring 44 and the worm 32 relative to the support shell 6, so as to avoid the support frame 31 relative to the support shell 6 due to non-human factors. The position of the bearing 4 changes, and when the rotating shaft 1 rotates, the rotating shaft 1 is supported by several rollers 30, which reduces the possibility of bending and deformation of the rotating shaft 1 and improves the stability of the rotating shaft 1 during rotation. When the movable ring 10 rotates in the opposite direction, so that the several clamping plates 12 no longer clamp the bearing 4, the second damping plate 39 drives the first damping plate 37 to rotate in the opposite direction through friction, so that the cam 36 rotates in the opposite direction, and the cam 36 no longer presses the support frame 31, so that the roller 30 no longer presses the rotating shaft 1. When the cam 36 contacts the stop plate 47, the cam 36 stops rotating in the opposite direction. As the movable ring 10 continues to rotate, the second damping plate 39 is no longer The method drives the first damping disc 37 to rotate in the opposite direction through friction, and the cam 36 stops after rotating to the preset position. The staff fixes the mounting plate 49 on the inner wall of the motor housing. When it is necessary to release the fixed relationship between the support shell 6 and the motor housing, the staff drives the second handle 54 and the plug block 52 to move, and the second compression spring 53 is in a compressed state to make the end of the plug block 52 disengage from the slot 51, so that the fixed relationship between the mounting plate 49 and the fixed block 48 can be released. The staff drives the support shell 6 and the fixed block 48 to move horizontally, and the fixed block 48 is no longer located on one side of the mounting plate 49, so that the fixed relationship between the support shell 6 and the motor housing can be released.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rotor assembly of a permanent magnet synchronous motor, comprising a rotating shaft (1) and a rotor portion (2), characterized in that: The rotor part (2) is fixedly sleeved on the outside of the rotating shaft (1), and support rings (3) are sleeved on both ends of the rotating shaft (1). A bearing (4) is provided in the support ring (3), and the bearing (4) and the rotating shaft (1) are interference-connected. A support shell (6) is provided on the side of the support ring (3) facing the rotor part (2); The inner wall of the support shell (6) and the support ring (3) are connected via a plurality of connecting columns (7); the support shell (6) is equipped with a clamping and positioning assembly for clamping and positioning the bearing (4); and the support shell (6) is equipped with a disassembly and assembly mechanism for fixed connection with the motor housing.

2. The rotor assembly of a permanent magnet synchronous motor according to claim 1, characterized in that: The clamping and positioning assembly comprises a support sleeve (8) fixedly mounted in the support shell (6), a threaded ring (9) is provided in the support sleeve (8), a thread matching the threaded ring (9) is provided on the inner wall of the support sleeve (8), a movable ring (10) is fixedly connected to the side of the threaded ring (9) away from the rotor part (2), a positioning unit for locating the position of the movable ring (10) is installed on the support shell (6), a plurality of grooves (11) are provided on the inner wall of the support ring (3), a clamping plate (12) for pressing the bearing (4) is provided in the groove (11), a through hole (13) is provided on the inner wall of the groove (11) away from the bearing (4), and the clamping plate (12) is fixedly mounted with A second movable block (16) is provided, and one end of the second movable block (16) away from the clamping plate (12) is located in the through hole (13). A first movable block (14) is provided in the through hole (13). The first movable block (14) and the second movable block (16) are connected via a first compression spring (17). A protrusion (15) is fixedly connected to the side of the first movable block (14) away from the second movable block (16). An inclined surface is provided on the inner wall of the movable ring (10), and the protrusion (15) contacts the inclined surface on the movable ring (10). A plurality of support blocks (5) are fixedly connected to the side of the support ring (3) facing the rotor part (2), and the support blocks (5) contact the bearing (4).

3. The rotor assembly of a permanent magnet synchronous motor according to claim 2, characterized in that: The positioning unit includes at least three first movable plates (21) arranged in the support shell (6), a plurality of first rectangular holes (22) are opened on the inner wall of the support sleeve (8), the number of the first rectangular holes (22) and the number of the first movable plates (21) are the same, and the end of the first movable plate (21) passes through the corresponding first rectangular hole (22), the first movable plate (21) is provided with a second movable plate (23) on the side facing the movable ring (10), and the second movable plate (23) is penetrated by a screw rod (25) and a guide column (24), and the screw rod ( The connection mode of the first movable plate (25) and the second movable plate (23) is a threaded connection, the guide column (24) passes through the first movable plate (21), the screw rod (25) and the first movable plate (21) are rotatably connected, and the guide column (24) and the inner wall of the support shell (6) are fixedly connected, a plurality of limiting grooves (28) are provided on the side of the movable ring (10) facing the rotor part (2), and the second movable plate (23) is fixedly connected to the limiting plate (26) on the side facing the movable ring (10), and the limiting plate (26) is located in one of the corresponding limiting grooves (28).

4. The rotor assembly of a permanent magnet synchronous motor according to claim 3, characterized in that: The end of the screw rod (25) away from the first movable plate (21) is fixedly connected to a turntable (27), and the side of the movable ring (10) away from the threaded ring (9) is fixedly connected to a plurality of first handles (20).

5. The rotor assembly of a permanent magnet synchronous motor according to claim 2, characterized in that: An iron plate (19) is fixedly connected to the side of the clamping plate (12) away from the bearing (4), and a magnet (18) adapted to the iron plate (19) is fixedly connected to the inner wall of the groove (11).

6. The rotor assembly of a permanent magnet synchronous motor according to claim 3, characterized in that: The support shell (6) is provided with a plurality of first connecting shafts (29), and the number of the first connecting shafts (29) and the first movable plate (21) is the same. The outer fixed sleeve of the first connecting shaft (29) is provided with a roller (30) in contact with the rotating shaft (1). The outer rotating sleeve of the first connecting shaft (29) is provided with a support frame (31). The support shell (6) is installed with a guide for limiting the position of the support frame (31). A worm (32) is provided on the side of the support frame (31) away from the rotating shaft (1). The worm (32) and the support shell (6) are rotatably connected. The worm (32) and the support frame (31) are connected to each other. A second connecting shaft (33) is provided between the support frame (31), the outer fixed sleeve of the second connecting shaft (33) is provided with a worm gear (34) and a cam (36), and the worm gear (34) and the worm (32) are meshed, and the cam (36) and the support frame (31) are in contact, the outer rotating sleeve of the second connecting shaft (33) is provided with a support plate (35), and the support plate (35) is fixedly connected to the inner wall of the support shell (6), and the support plate (35) is fixedly installed with a stop plate (47) for limiting the position of the cam (36), and a transmission device adapted to the threaded ring (9) is installed in the support shell (6).

7. The rotor assembly of a permanent magnet synchronous motor according to claim 6, characterized in that: The transmission comprises a first damping disc (37) fixedly mounted on the end of the worm (32); a second damping disc (39) is provided on the side of the first damping disc (37) away from the worm (32); a third connecting shaft (38) is fixedly connected to the side of the second damping disc (39) away from the first damping disc (37); the third connecting shaft (38) and the support ring (3) are rotatably connected; an external fixed sleeve of the third connecting shaft (38) is provided with a gear (40); a plurality of gear teeth meshing with the gear (40) are fixedly connected to the inner wall of the threaded ring (9); a fixed ring (44) is provided on the external fixed sleeve of the worm (32); a plurality of positioning holes (45) are opened on the fixed ring (44); a positioning column (46) is fixedly connected to the side of the first movable plate (21) away from the second movable plate (23), and the positioning column (46) is located in one of the corresponding positioning holes (45).

8. The rotor assembly of a permanent magnet synchronous motor according to claim 6, characterized in that: The guide member comprises a fixing plate (41) fixedly mounted on the support frame (31), a guide plate (42) passing through the fixing plate (41), and two ends of the guide plate (42) are fixedly connected to the inner wall of the support shell (6) through a connecting plate (43) respectively.

9. The rotor assembly of a permanent magnet synchronous motor according to claim 1, characterized in that: The disassembly and assembly mechanism includes fixed blocks (48) respectively fixedly mounted on the outer walls of both sides of the support shell (6), a mounting plate (49) is provided on the side of the fixed block (48) away from the support shell (6), a sliding groove (50) is provided on the side of the fixed block (48) facing the mounting plate (49), a slot (51) is provided on the side of the mounting plate (49) facing the fixed block (48), an insert block (52) is provided in the sliding groove (50), one end of the insert block (52) is located in the corresponding slot (51), the other end of the insert block (52) and the inner wall of the sliding groove (50) are connected by a second compression spring (53), a second rectangular hole (55) is provided on the inner wall of the sliding groove (50), a second handle (54) is fixedly mounted on the insert block (52), and the second handle (54) passes through the second rectangular hole (55).

10. A permanent magnet synchronous motor, comprising: The stator assembly and the rotor assembly according to any one of claims 1 to 9 are characterized in that the rotor assembly is arranged inside the stator assembly.

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