CN-122001118-A - Rotor assembly of permanent magnet synchronous motor and permanent magnet synchronous motor

Abstract

The invention discloses a rotor assembly of a permanent magnet synchronous motor and the permanent magnet synchronous motor, which relate to the technical field of motors and comprise a rotor iron core and a rotating shaft coaxially fixed with the rotor iron core, wherein a circular baffle is fixed at the end part of the rotor iron core, a ring sleeve plate parallel to the circular baffle is movably sleeved on the rotating shaft, a threaded rod movably penetrates through the outer side wall of the ring sleeve plate, the threaded rod can axially move and is in limit clamping connection with the rotating shaft, a dynamic balance weight unit in transmission connection with the threaded rod is movably arranged on the ring sleeve plate, and the driving of the threaded rod can control the withdrawal and recovery of the fixed limit state of the ring sleeve plate when the switching assembly is in a right-offset position.

Inventors

• Dai Maocun
• DAI MAOHUA

Assignees

• 江苏华胜电机(集团)有限公司

Dates

Publication Date

20260508

Application Date

20260210

Claims (10)

1. 1. The utility model provides a permanent magnet synchronous motor's rotor subassembly, includes rotor core (1) and with rotor core (1) coaxial fixed pivot (2), rotor core (1)'s tip is fixed with circular baffle (3), its characterized in that, movable sleeve has linked in advance with circular baffle (3) ring sleeve board (4) on pivot (2), ring sleeve board (4) lateral wall activity has threaded rod (5) throughout, threaded rod (5) can take place axial displacement and pivot (2) and take place spacing joint, movable balance weight unit (6) that are connected with threaded rod (5) transmission are installed to ring sleeve board (4) last movable mounting, be equipped with between dynamic balance weight unit (6) and threaded rod (5) and switch subassembly (7), switch subassembly (7) are in right deviation position then the drive of threaded rod (5) can control the withdrawal and the recovery of the fixed limit state of ring sleeve board (4).
2. 2. Rotor assembly of a permanent magnet synchronous motor according to claim 1, characterized in that the ring plate (4) comprises a circular plate body (4.1), and a central opening (4.2) which is in fit connection with the rotating shaft (2) is formed in the central position of the circular plate body (4.1).
3. 3. A rotor assembly of a permanent magnet synchronous motor according to claim 1, characterized in that the dynamic balance weight unit (6) comprises a long strip groove (6.1) arranged along the radial direction of the ring sleeve plate (4), and the long strip groove (6.1) is internally and slidably provided with a sliding block (6.2) capable of being in meshed transmission with the threaded rod (5).
4. 4. A rotor assembly of a permanent magnet synchronous motor according to claim 3, wherein the switching assembly (7) comprises a positioning groove (7.1) formed in the side face of the sliding block (6.2), a guide rail rod (7.2) is movably matched in the positioning groove (7.1), groove walls of the strip grooves (6.1) which are uniformly and respectively corresponding to two ends of the guide rail rod (7.2) are rotatably connected, a plurality of linear distribution corrugated grooves (7.3) are formed in the groove walls of the positioning groove (7.1), a plurality of linear distribution protruding blocks (7.4) are fixed on one side of the rod body of the guide rail rod (7.2), the protruding blocks (7.4) are meshed with the corrugated grooves (7.3) to be clamped to limit linear movement of the sliding block (6.2) when the guide rail rod (7.2) is deflected to the first position, and the switching assembly (7) is located at the right offset position.
5. 5. The rotor assembly of a permanent magnet synchronous motor according to claim 4, wherein a limiting ring (7.5) sleeved and fixed with the threaded rod (5) is arranged in the positioning groove (7.1), a limiting fork (7.6) fixed with the guide rail rod (7.2) is arranged in one end groove of the positioning groove (7.1), and when the guide rail rod (7.2) deflects to the second position, a fork opening of the limiting fork (7.6) is clamped with the limiting ring (7.5) to limit the axial movement of the threaded rod (5), and the switching assembly (7) is positioned at a left-biased position.
6. 6. The rotor assembly of a permanent magnet synchronous motor according to claim 5, wherein a sealing cover plate (16) is fixed at a notch at the other end of the positioning groove (7.1), a wire column (8) extending into the positioning groove (7.1) is vertically and spirally penetrated by the sealing cover plate (16), a first deflector rod (9) and a second deflector rod (10) are fixed on the circumference of the guide rail rod (7.2), a protruding disc (11) fixedly sleeved with the wire column (8) is arranged between the first deflector rod (9) and the second deflector rod (10), and both the first deflector rod (9) and the second deflector rod (10) can be pushed by the protruding disc (11) to drive the guide rail rod (7.2) to deflect.
7. 7. The rotor assembly of a permanent magnet synchronous motor according to claim 6, wherein the wire column (8) is located right above the threaded rod (5), a tooth block (12) capable of being meshed and clamped with the threaded rod (5) is rotatably installed at the bottom end of the wire column (8), and the tooth block (12) and the threaded rod (5) are extruded to limit axial rotation of the threaded rod (5).
8. 8. The rotor assembly of a permanent magnet synchronous motor according to claim 7, wherein arc-shaped grooves matched with the threaded rods (5) are formed in the bottoms of the tooth blocks (12) and the bottoms of the sliding blocks (6.2), tooth grooves matched with the threads of the threaded rods (5) are formed in the groove walls of the arc-shaped grooves, and the edge surfaces of the tooth blocks (12) are in vertical sliding contact with the groove wall surfaces of the long grooves (6.1).
9. 9. A rotor assembly of a permanent magnet synchronous motor according to claim 3, characterized in that the top of the sliding block (6.2) is provided with a containing groove (13), the bottom surface of the containing groove (13) is provided with a plurality of screw holes (14), and weight screws (15) are correspondingly and adaptively arranged in the screw holes (14).
10. 10. A permanent magnet synchronous motor, characterized in that it is provided with a rotor assembly according to any one of claims 1-9.

Description

Rotor assembly of permanent magnet synchronous motor and permanent magnet synchronous motor Technical Field The invention relates to the technical field of motors, in particular to a rotor assembly of a permanent magnet synchronous motor and the permanent magnet synchronous motor. Background The permanent magnet synchronous motor is a motor which generates a synchronous rotating magnetic field through permanent magnet excitation, wherein the dynamic balance state of the rotor of the motor has important influence on the running stability of the motor, the noise of movement and the service life of the motor when the rotor of the motor rotates, so that the dynamic balance adjustment of the rotor of the motor is particularly important; The prior art is provided with a CN112688449B, the name of the patent is a motor rotor, a dynamic balance adjusting method and a motor thereof, the motor rotor in the patent comprises a rotating shaft, a rotor iron core, a dynamic balance adjusting assembly and a dynamic balance adjusting component, wherein the rotating shaft comprises a shaft body, the rotor iron core is sleeved on the shaft body, the dynamic balance adjusting assembly comprises a circular baffle plate, the circular baffle plate is sleeved on the shaft body and positioned at least one end part of the rotor iron core, a plurality of balance test grooves are formed in the circular baffle plate and are uniformly distributed in the circumferential direction of the circular baffle plate, corresponding balance mass blocks are arranged in the balance test grooves and can slide along the balance test grooves so as to dynamically balance the motor rotor, and the motor rotor solves the problem of great dynamic balance adjusting difficulty; According to the technical scheme, the dynamic balance adjustment of the motor rotor is achieved by changing the positions of the balance mass blocks in the balance test grooves, but the existing scheme has the defects that although a plurality of balance test grooves are uniformly distributed on the annular baffle, the positions of the balance test grooves on the annular baffle are fixed, the balance test grooves are provided with intervals, in practical application, it is difficult to ensure that the unbalanced mass is always in the groove inner area of the balance test groove, when the unbalanced mass is in the groove outer area of the balance test groove, the existing scheme is difficult to achieve adjustment, and a dynamic balance adjustment blind area exists, so that a new technical scheme is proposed to solve the problems. Disclosure of Invention The invention aims to provide a rotor assembly of a permanent magnet synchronous motor and the permanent magnet synchronous motor, so as to solve the defects in the prior art. In order to achieve the above object, the present invention provides the following technical solutions: The utility model provides a permanent magnet synchronous motor's rotor subassembly, includes rotor core and the pivot coaxial fixed with rotor core, rotor core's tip is fixed with circular baffle, the activity has cup jointed the ring cover board that parallels with circular baffle in the pivot, ring cover board lateral wall activity has run through the threaded rod, the axial displacement takes place spacing joint with the pivot to the threaded rod, movable mounting has the dynamic balance counter weight unit of being connected with the threaded rod transmission on the ring cover board, the drive of switching component in right offset position then the threaded rod can control the withdrawal and the recovery of the fixed spacing state of ring cover board. Preferably, the annular plate comprises a round circular plate body, and a central opening which is in fit connection with the rotating shaft is formed in the central position of the circular plate body. Preferably, the dynamic balance weight unit comprises a long strip groove which is formed along the radial direction of the loop plate, and a sliding block which can be in meshed transmission with the threaded rod is slidably matched in the long strip groove. Preferably, the switching component comprises a positioning groove formed in the side face of the sliding block, a guide rail rod is movably matched in the positioning groove, groove walls of the long grooves uniformly and respectively corresponding to two ends of the guide rail rod are rotationally connected, a plurality of linear distribution toothed grooves are formed in the groove walls of the positioning groove, a plurality of linear distribution protruding blocks are fixed on one side of a rod body of the guide rail rod, the guide rail rod deflects to a first position, and the protruding blocks are engaged with the toothed grooves to limit linear movement of the sliding block, so that the switching component is positioned at a right deviation position. Preferably, a limiting ring sleeved and fixed with the threaded rod is arranged in the positioning