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CN-122001122-A - Motor and actuator

CN122001122ACN 122001122 ACN122001122 ACN 122001122ACN-122001122-A

Abstract

The application provides a motor, which comprises a rotor part, wherein the rotor part comprises a plurality of rotor punching sheets and a plurality of magnetic steels, the rotor punching sheets are stacked and arranged along the axial direction of the rotor part, the rotor punching sheets comprise clamping parts, the magnetic steels are clamped with the clamping parts, the number of the clamping parts in each rotor punching sheet is less than the number of poles of the rotor part, and the clamping parts of at least two adjacent rotor punching sheets are arranged in a staggered manner in the circumferential direction of the rotor part. The application also provides an actuator, which comprises a motor and a speed reducer, wherein the motor is connected with the speed reducer, the motor comprises a rotor part, the rotor part comprises a plurality of rotor punching sheets and a plurality of magnetic steels, the plurality of rotor punching sheets are arranged in a lamination manner along the axial direction of the rotor part, and the rotor punching sheet structure is the same as that described above. The clamping parts of the adjacent rotor punching sheets are arranged in a staggered mode, the number of the clamping parts distributed on two sides of the magnetic steel can be reduced, and then the magnetic leakage phenomenon is reduced, and therefore performance of the actuator is improved.

Inventors

  • Request for anonymity

Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1. An electric machine, characterized by comprising a rotor part (10), the rotor part (10) comprising a plurality of rotor laminations (101) and a plurality of magnetic steels (102), the plurality of rotor laminations (101) being arranged in a stack along an axial direction of the rotor part (10); The rotor punching sheets (101) comprise clamping parts (1011), the magnetic steel (102) is clamped by the clamping parts (1011), the number of the clamping parts (1011) of each rotor punching sheet (101) is smaller than the number of poles of the rotor part (10), and the clamping parts (1011) of at least two adjacent rotor punching sheets (101) are arranged in a staggered mode in the circumferential direction of the rotor part (10).
  2. 2. The electric machine according to claim 1, characterized in that the number of the clamping portions (1011) of the rotor punching sheet (101) is two, the two clamping portions (1011) being symmetrically arranged in the circumferential direction of the rotor portion (10); In the axial direction of the rotor part (10), the clamping sections (1011) of adjacent rotor punching sheets (101) are partially overlapped.
  3. 3. The electric machine according to claim 1 or 2, characterized in that the rotor punching (101) comprises a ring portion (1012), the clamping portion (1011) being in one piece with the ring portion (1012), the clamping portion (1011) being located circumferentially outside the ring portion (1012), the clamping portion (1011) extending outwardly from the ring portion (1012) in a radial direction of the ring portion (1012).
  4. 4. The motor according to claim 1 or 2, characterized in that the clamping portion (1011) includes a first extension portion (1013) and a second extension portion (1014), the first extension portion (1013) and the second extension portion (1014) being arranged at intervals in a circumferential direction of the rotor portion (10), the magnetic steel (102) being partially located between the first extension portion (1013) and the second extension portion (1014).
  5. 5. The electric machine according to claim 4, characterized in that the second extension (1014) of the clamping portion (1011) at least partially overlaps the first extension (1013) of an adjacent clamping portion (1011) in the axial direction of the rotor portion (10).
  6. 6. The electric machine according to claim 4, characterized in that the clamping portion (1011) comprises a first limit projection (1015) and a second limit projection (1016), the first limit projection (1015) being integral with the first extension (1013), the second limit projection (1016) being integral with the second extension (1014); in the circumferential direction of the rotor part (10), the first limit protrusion (1015) extends from the first extension (1013) to the second extension (1014), the second limit protrusion (1015) extends from the second extension (1014) to the first extension (1013), and the first limit protrusion (1015) and the second limit protrusion (1016) are in contact with the magnetic steel (102).
  7. 7. The electric machine according to claim 6, characterized in that it defines the rotor portion (10) having a central axis (L), the first limit projection (1015) being located at an end of the first extension (1013) remote from the central axis (L), the first limit projection (1015) having a first chamfer (1017) between the first extension (1013), the second limit projection (1015) being located at an end of the second extension (1014) remote from the central axis (L), the second limit projection (1015) having a second chamfer (1018) between the second extension (1014).
  8. 8. An actuator, characterized by comprising a motor (1) and a speed reducer (2), wherein the motor (1) is connected with the speed reducer (2), the motor (1) comprises a rotor part (10), the rotor part (10) comprises a plurality of rotor punching sheets (101) and a plurality of magnetic steels (102), and the rotor punching sheets (101) are arranged in a stacked manner along the axial direction of the rotor part (10); The rotor punching sheets (101) comprise clamping parts (1011), the magnetic steel (102) is clamped with the clamping parts (1011), the number of the clamping parts (1011) of each rotor punching sheet (101) is smaller than the number of poles of the rotor part (10), and the clamping parts (1011) of the adjacent rotor punching sheets (101) are arranged in a staggered mode in the circumferential direction of the rotor part (10).
  9. 9. The actuator according to claim 8, wherein the decelerator (2) comprises an input (201) and an output (202), the actuator comprises an output flange (3), the motor (1) comprises a shaft portion (20), a stator portion (30) and a motor housing (40), the stator portion (30) is located in the motor housing (40), the rotor portion (10) is connected with the shaft portion (20), the shaft portion (20) is connected with the input (201), and the output (202) is connected with the output flange (3).
  10. 10. The electric machine according to claim 9, characterized in that the input (201) comprises a cam (2011) and a flexible bearing (2012), the output (202) comprises a flexspline (203) and a rigid spline (204), the reducer (2) comprises a reducer housing (203); The rotating shaft part (20) is connected with the cam (2011), the cam (2011) is connected with an inner ring of the flexible bearing (2012), an outer ring of the flexible bearing (2012) is connected with the flexible gear (203), the flexible gear (203) is meshed with the rigid gear (204), the rigid gear (204) is fixedly matched with the speed reducer shell (203), and the flexible gear (203) is connected with the output flange (3).

Description

Motor and actuator Technical Field The application relates to the field of actuators, in particular to a motor rotor of an actuator. Background In the related art, the motor comprises a rotor, a stator and a rotating shaft, wherein the stator and the rotor are matched to drive the rotating shaft to rotate and output the rotation. However, the magnetic leakage phenomenon of the motor in the related art is obvious, so that the performance of the motor can be affected by the response. Disclosure of Invention In the process of research and development design, some designs are also made to the rotor structure, wherein the rotor includes the rotor towards the piece of stacking layer upon layer, all is provided with limit structure on every layer of rotor towards the piece, and the magnet steel is located limit structure, and limit structure in the adjacent rotor towards the piece also overlaps and corresponds, and limit structure can carry out spacingly to the magnet steel in circumferencial direction and radial direction. However, research and development personnel find that the limit structure of the magnetic steel at two sides of the circumferential direction can aggravate the magnetic leakage phenomenon. The application provides a motor capable of reducing magnetic leakage. The application provides a motor, which comprises a rotor part, wherein the rotor part comprises a plurality of rotor punching sheets and a plurality of magnetic steels, and the rotor punching sheets are stacked and arranged along the axial direction of the rotor part; The rotor punching sheets comprise clamping parts, the magnetic steel is clamped by the clamping parts, the number of the clamping parts in each rotor punching sheet is smaller than the number of poles of the rotor part, and the clamping parts of at least two adjacent rotor punching sheets are arranged in a staggered mode in the circumferential direction of the rotor part. In the circumferential direction of the rotor part, the clamping parts of the adjacent rotor punching sheets are arranged in a staggered mode when the magnetic steel is limited, the number of the clamping parts distributed on two sides of the magnetic steel can be reduced, and then the magnetic leakage phenomenon is reduced. The application also provides an actuator, which comprises a motor and a speed reducer, wherein the motor is connected with the speed reducer, the motor comprises a rotor part, the rotor part comprises a plurality of rotor punching sheets and a plurality of magnetic steels, and the rotor punching sheets are arranged in a lamination manner along the axial direction of the rotor part; The rotor punching sheets comprise clamping parts, the magnetic steel is clamped with the clamping parts, the number of the clamping parts of each rotor punching sheet is smaller than that of poles of the rotor part, and the clamping parts of at least two adjacent rotor punching sheets are arranged in a staggered mode in the circumferential direction of the rotor part. In the application, as well, the clamping parts of the adjacent rotor punching sheets are arranged in a staggered way, so that the number of the clamping parts distributed on two sides of the magnetic steel can be reduced, and the magnetic leakage phenomenon is further reduced, thereby improving the performance of the actuator. Drawings FIG. 1 is a schematic perspective view of an actuator according to the present application; FIG. 2 is a cross-sectional view of an actuator according to the present application; FIG. 3 is a perspective view showing the connection of the rotor portion and the shaft portion in the present application; FIG. 4 is a partially exploded view of a rotor portion and a shaft portion of the present application; FIG. 5 is an enlarged view of circle A of FIG. 4; FIG. 6 is a schematic top view of a rotor portion structure of the present application; FIG. 7 is an exploded view of a rotor portion of the present application; FIG. 8 is an enlarged view of circle B of FIG. 7; Fig. 9 is a schematic perspective view of a rotor punching structure in the present application. Detailed Description For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other technical solutions, based on the embodiments of the application, which a person skilled in the art would obtain without making any inventive effort, fall within the scope of protection of the application. For convenience of understanding, the features described in the related art will be referred to by the same or similar names as those of the features of the present application, so as to facilitate understanding of the differences between the present application and the related art, and also for convenience of distingui