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CN-224233408-U - Motor stator and outer rotor motor comprising same

CN224233408UCN 224233408 UCN224233408 UCN 224233408UCN-224233408-U

Abstract

The utility model discloses a motor stator and an outer rotor motor comprising the same, comprising a stator core, wherein the stator core comprises a plurality of first iron core punching sheets and a plurality of second iron core punching sheets, each of the first iron core punching sheets and the second iron core punching sheets comprises an annular yoke part and a plurality of stator teeth extending outwards from the annular yoke part in a radial direction, the second iron core punching sheets also comprise a supporting part positioned at the radial inner side of the annular yoke part, and the supporting part is connected with a motor shaft of the outer rotor motor in a matching way. The second iron core punching sheets are sequentially stacked along the axial direction, and the first iron core punching sheets are sequentially stacked at the two ends of the second iron core punching sheets along the axial direction respectively, so that the two ends of the stator iron core form a sinking structure with the concave middle part. The motor stator disclosed by the utility model is simple in structure composition, does not need to be fixed through a complex process, greatly reduces the cost and weight of a product under the condition that the stator assembly ensures the performance, and can optimize the assembly space of parts and reduce the thickness of the whole machine.

Inventors

  • WU TINGHAN
  • KONG LINGZHOU
  • WANG SHENG

Assignees

  • 常州雷利电机科技有限公司

Dates

Publication Date
20260512
Application Date
20250520

Claims (13)

  1. 1. The motor stator is characterized by comprising a stator core (1), wherein the stator core (1) comprises a plurality of first iron core punched sheets (101) and a plurality of second iron core punched sheets (102), each of the first iron core punched sheets (101) and the second iron core punched sheets (102) comprises an annular yoke part (2) and a plurality of stator teeth (3) extending outwards from the annular yoke part (2) in a radial direction, the second iron core punched sheets (102) further comprise a supporting part (4) positioned at the radial inner side of the annular yoke part (2), and the supporting part (4) is connected with a motor shaft (13) of an outer rotor (12) motor in a matching way; The second iron core punching sheets (102) are sequentially stacked along the axial direction, and the first iron core punching sheets (101) are sequentially stacked at the two ends of the second iron core punching sheets (102) along the axial direction respectively, so that the two ends of the stator iron core (1) form a sunk structure (9) with the middle part concave.
  2. 2. The motor stator according to claim 1, wherein the core laminations stacked in sequence are fixed by riveting.
  3. 3. The motor stator according to claim 2, wherein the corresponding stator teeth (3) of the first core punching sheet (101) and the second core punching sheet (102) are provided with overlapping rivet points (6) protruding towards the same side, and overlapping rivet blind holes (7) are formed on the surfaces of the stator teeth (3) located on the other side of the overlapping rivet points (6).
  4. 4. An electric motor stator according to claim 3, characterized in that the stator teeth (3) provided with the staking points (6) are spaced apart from the stator teeth (3) not provided with the staking points (6).
  5. 5. The motor stator according to claim 3, wherein one end of the stator core (1) protruding with the lamination point (6) is further provided with a third core sheet (103), the third core sheet (103) comprises an annular yoke (2) and a plurality of stator teeth (3) extending radially outwards from the annular yoke (2), and the stator teeth (3) of the third core sheet (103) are provided with lamination through holes (8) corresponding to the lamination point (6).
  6. 6. The motor stator according to claim 1, characterized in that the axial depth of the sinking structure (9) is 5 mm-10 mm.
  7. 7. The motor stator according to claim 1, wherein the radial distance from the center of the motor shaft (13) to the inner peripheral surface of the annular yoke (2) of the first core sheet (101) and the second core sheet (102) is equal.
  8. 8. An electric motor stator according to claim 1, characterized in that the support part (4) of the second core segment (102) has a radial gap with the annular yoke part (2), which radial gap forms a wire storage slot (10) accommodating a connecting wire (11).
  9. 9. The motor stator according to claim 8, wherein the wire storage grooves (10) are arranged in a plurality at intervals in a circumferential direction.
  10. 10. The motor stator according to claim 9, wherein the number of the wire storage grooves (10) is 3 to 6.
  11. 11. The motor stator according to claim 1, wherein the center of the support portion (4) has a shaft hole (5) that mates with the motor shaft (13), and the inner peripheral surface of the shaft hole (5) has a key groove (501) that mates with a flat key on the surface of the motor shaft (13).
  12. 12. An external rotor motor is characterized by comprising a rotor (12), a motor shaft (13) and the motor stator according to any one of claims 1-11, wherein the rotor (12) is positioned outside the motor stator, and bearings (14) are arranged at two ends of the motor shaft (13).
  13. 13. The external rotor motor according to claim 12, wherein the inner diameter of the sinking structure (9) is larger than the outer diameter of the bearing (14), and the bearing (14) at the input end of the motor shaft (13) is partially sunk into the sinking structure (9).

Description

Motor stator and outer rotor motor comprising same Technical Field The utility model relates to the technical field of motor design, in particular to a motor stator and an outer rotor motor comprising the motor stator, which are mainly used in the field of commercial robots. Background In current in-wheel motor stator structure of robot, iron core subassembly mainly by a plurality of punching from top to bottom riveting form, iron core subassembly's structure mainly has two kinds, first is the annular structure that comprises yoke portion and tooth portion, and the second is by the lamination of the inboard punching that has bearing structure of yoke portion forms, and wherein first kind iron core subassembly needs to cooperate with the plastics support for form the shaft hole of installation motor shaft, the stator in patent number CN108964298A comprises iron core, support and axle sleeve three, and spare part is more, and the installation technology is complicated. The second type of iron core component has simple structure, but the thickness of the iron core is consistent from inside to outside, and the whole iron core component is thick and heavy, so that the motor has larger quality. And because the punching sheet structure of the iron core component is single, in order to control the thickness of the motor, the whole thickness of the iron core component can be reduced, but the motor performance can be reduced, otherwise, the axial space inside the motor can be increased only to increase the core stacking thickness if the performance meets the requirement, in addition, the whole motor is also required to be provided with a bearing, and the final whole thickness of the hub motor is also very large, so that the light-weight requirement of the hub motor of the existing robot can not be met. In summary, how to design a robot hub motor with simple structural composition and mounting process, which can meet performance requirements and realize light-weight design is a technical problem to be solved at present. Disclosure of utility model In order to solve the technical problems of complex installation process and large overall thickness and mass of a hub motor stator structure in the prior art, the utility model provides a motor stator and an outer rotor motor comprising the motor stator to solve the problems. The utility model provides a motor stator, which comprises a stator core, wherein the stator core comprises a plurality of first iron core punching sheets and a plurality of second iron core punching sheets, each of the first iron core punching sheets and the second iron core punching sheets comprises an annular yoke part and a plurality of stator teeth extending outwards from the annular yoke part in a radial direction, and the second iron core punching sheets further comprise a supporting part positioned at the radial inner side of the annular yoke part, and the supporting part is connected with a motor shaft of an outer rotor motor in a matching way. The second iron core punching sheets are sequentially stacked along the axial direction, and the first iron core punching sheets are sequentially stacked at the two ends of the second iron core punching sheets along the axial direction respectively, so that the two ends of the stator iron core form a sinking structure with the concave middle part. In an alternative embodiment of the present utility model, the core laminations stacked in sequence are fixed by riveting. In an alternative embodiment of the present utility model, the corresponding stator teeth of the first core punching sheet and the second core punching sheet are provided with overlapping riveting points protruding to the same side, and the surfaces of the stator teeth positioned at the other side of the overlapping riveting points form overlapping blind holes. In an alternative embodiment of the utility model, the stator teeth provided with the staking points are arranged with the stator teeth not provided with the staking points. In an alternative embodiment of the present utility model, a third core sheet is further disposed at an end of the stator core protruding from the stacking rivet point, the third core sheet includes an annular yoke portion and a plurality of stator teeth extending radially outward from the annular yoke portion, and the stator teeth of the third core sheet have stacking rivet through holes corresponding to the stacking rivet point. In an alternative embodiment of the present utility model, the axial depth of the submerged structure is 5mm to 10mm. In an alternative embodiment of the present utility model, the radial distance from the center of the motor shaft to the inner circumferential surfaces of the annular yokes of the first and second core laminations is equal. In an alternative embodiment of the utility model, the support portion of the second core segment has a radial gap with the annular yoke portion, the radial gap forming a wire storage slot for receiv