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CN-224204838-U - Rotor

CN224204838UCN 224204838 UCN224204838 UCN 224204838UCN-224204838-U

Abstract

A rotor includes a central shaft and a plastic and magnetic powder mixing body. The central shaft has an axial direction. The plastic and the magnetic powder are mixed and arranged around the central shaft and are integrally formed into a single component. The plastic and magnetic powder mixture comprises a first surface vertical to the axial direction, a second surface vertical to the axial direction, a plurality of ribs and a plurality of through holes. The second face faces in the opposite direction to the first face. The ribs are arranged on the first surface and/or the second surface in a protruding mode and are symmetrically arranged around the axial direction. The through holes penetrate through the first surface and the second surface and are arranged around the axial direction.

Inventors

  • HUANG JIANLIN
  • LI KUNZHOU

Assignees

  • 台达电子工业股份有限公司

Dates

Publication Date
20260505
Application Date
20250424

Claims (15)

  1. 1. A rotor for a motor, comprising: A central shaft having an axial direction, and A plastic and magnetic powder mixing body, which is arranged around the central shaft and is a single component formed integrally, the plastic and magnetic powder mixing body comprises: A first surface perpendicular to the axial direction; A second surface perpendicular to the axial direction, wherein the second surface and the first surface face opposite directions; a plurality of ribs protruding from the first surface and/or the second surface and symmetrically arranged around the axial direction, and The through holes penetrate through the first surface and the second surface and are arranged around the axial direction.
  2. 2. The rotor of claim 1, wherein the plurality of ribs are disposed along a radial direction of the axial direction.
  3. 3. The rotor of claim 1, wherein the plurality of ribs comprises a first portion rib and a second portion rib, the first portion rib protruding from the first face, and the second portion rib protruding from the second face.
  4. 4. A rotor as claimed in claim 3 wherein the projection of the first partial rib onto a plane perpendicular to the axial direction at least partially overlaps the projection of the second partial rib onto the plane.
  5. 5. A rotor as claimed in claim 3, wherein the projection of the first partial rib onto a plane perpendicular to the axial direction and the projection of the second partial rib onto the plane do not overlap each other.
  6. 6. A rotor according to claim 1, wherein the plastic and magnetic powder mixing body further comprises a third surface connecting respective outer edges of the first surface and the second surface and parallel to the axial direction.
  7. 7. The rotor of claim 6, wherein a maximum distance between each of the plurality of ribs and the axial direction is less than or equal to a distance between the third face and the axial direction.
  8. 8. The rotor of claim 6, wherein a longitudinal axis of each of the plurality of through holes is less than a distance from the third face.
  9. 9. A rotor as in claim 1, wherein the plastic and magnetic powder mixing body further comprises at least one groove surrounding the central axis and formed in the plastic and magnetic powder mixing body from the first face toward the second face and/or formed in the plastic and magnetic powder mixing body from the second face toward the first face.
  10. 10. The rotor of claim 9, wherein a distance between an inner edge of the at least one groove and a periphery of the central shaft is greater than zero.
  11. 11. The rotor of claim 9, wherein the plurality of through holes correspond to the at least one groove in the axial direction.
  12. 12. The rotor of claim 9, wherein the first face comprises a first inner annulus and a first outer annulus, and the at least one groove is located between the first inner annulus and the first outer annulus, and/or the second face comprises a second inner annulus and a second outer annulus, and the at least one groove is located between the second inner annulus and the second outer annulus.
  13. 13. The rotor of claim 12, wherein the plurality of ribs are protruding on the first outer ring surface and/or the second outer ring surface.
  14. 14. The rotor of claim 1, wherein at least one of the plurality of through holes is disposed between two adjacent ribs of the plurality of ribs.
  15. 15. The rotor of claim 1, wherein each of the plurality of ribs is of a different polarity on both sides.

Description

Rotor Technical Field The present disclosure relates to a rotor, and more particularly to a rotor made of a mixture of plastic and magnetic powder and having a good heat dissipation effect. Background In general, a rotor, such as an inner rotor, used in a motor is formed by combining a magnet with a plastic on a central shaft, and the magnet and the central shaft are combined by using the plastic after the magnet is positioned in advance, so that the process is complicated and complicated. In addition, during the operation of the motor, no matter the rotor itself or other components inside the motor, such as circuit components, silicon steel sheets, copper wires, etc., heat is generated, and how to improve the heat dissipation effect and thus the motor performance is an important issue in the art for a long time. Therefore, it is necessary to develop a rotor that can improve the above-described drawbacks. Novel content The purpose of the present case is to provide a rotor that the technology is simplified and radiating effect promotes. To achieve the above objective, a rotor is provided, which comprises a central shaft and a plastic-magnetic powder mixing body. The central shaft has an axial direction. The plastic and the magnetic powder are mixed and arranged around the central shaft and are integrally formed into a single component. The plastic and magnetic powder mixture comprises a first surface vertical to the axial direction, a second surface vertical to the axial direction, a plurality of ribs and a plurality of through holes. The second face faces in the opposite direction to the first face. The ribs are arranged on the first surface and/or the second surface in a protruding mode and are symmetrically arranged around the axial direction. The through holes penetrate through the first surface and the second surface and are arranged around the axial direction. In one embodiment, the plurality of ribs are disposed in a radial direction along the axial direction. In one embodiment, the plurality of ribs includes a first portion rib and a second portion rib, the first portion rib is disposed on the first surface in a protruding manner, and the second portion rib is disposed on the second surface in a protruding manner. In one embodiment, the projection of the first partial rib onto a plane perpendicular to the axial direction at least partially overlaps with the projection of the second partial rib onto the plane. In one embodiment, the projection of the first partial rib on a plane perpendicular to the axial direction and the projection of the second partial rib on the plane do not overlap each other. In an embodiment, the plastic-magnetic powder mixing body further includes a third surface connecting respective outer edges of the first surface and the second surface and being parallel to the axial direction. In one embodiment, a maximum distance between each of the plurality of ribs and the axial direction is less than or equal to a distance between the third face and the axial direction. In one embodiment, the longitudinal axis of each of the plurality of through holes is less than the distance from the third face. In an embodiment, the plastic and magnetic powder mixing body further comprises at least one groove surrounding the central axis, and formed on the plastic and magnetic powder mixing body in a direction from the first face to the second face and/or formed on the plastic and magnetic powder mixing body in a direction from the second face to the first face. In one embodiment, the distance between the inner edge of the at least one groove and the periphery of the central shaft is greater than zero. In one embodiment, the plurality of through holes axially correspond to the at least one groove. In an embodiment, the first face comprises a first inner annulus and a first outer annulus, and the at least one groove is located between the first inner annulus and the first outer annulus, and/or the second face comprises a second inner annulus and a second outer annulus, and the at least one groove is located between the second inner annulus and the second outer annulus. In one embodiment, the plurality of ribs are protruded on the first outer ring surface and/or the second outer ring surface. In one embodiment, at least one of the plurality of through holes is disposed between two adjacent ribs of the plurality of ribs. In one embodiment, each of the plurality of ribs has a different polarity on each side. The rotor is made of a mixed material of plastic and magnetic powder, so that the process can be greatly simplified to only need a single injection molding step, and the process complexity is effectively reduced. Furthermore, the ribs protruding from the surface are formed on the body, so that the surrounding air can be disturbed during operation, and the through holes penetrating through the inside are formed, so that circulating air flow passing through the inside of the body can be generated dur