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CN-224218259-U - Electric vehicle hub motor

CN224218259UCN 224218259 UCN224218259 UCN 224218259UCN-224218259-U

Abstract

The utility model relates to the technical field of motors for electric vehicles, and particularly discloses an electric vehicle hub motor, wherein a stator iron core is fixedly arranged on a motor shaft and comprises a left iron core and a right iron core which are integrally formed, the left iron core is alternately provided with a plurality of first stator teeth and a plurality of first stator grooves along the circumferential direction, the right iron core is alternately provided with a plurality of second stator teeth and a plurality of second stator grooves along the circumferential direction, the notch of the first stator groove and the notch of the second stator groove face towards the two axial sides of the motor shaft, a first coil winding is wound on the first stator teeth, a second coil winding is wound on the second stator teeth, a left rotor magnetic steel is arranged in a left end cover and corresponds to the left iron core, and a right rotor magnetic steel is arranged in a right end cover and corresponds to the right iron core. The structure of rotor-stator-rotor is adopted, the stator core adopts an axial double-groove type, and the stator core is designed corresponding to the double-rotor double-magnetic steel set, so that double-power axial output is realized, and the torque and the power density of the motor are obviously improved.

Inventors

  • XIA ZHENGPENG
  • XIE BO
  • CHEN JINSONG

Assignees

  • 雅迪科技集团有限公司

Dates

Publication Date
20260508
Application Date
20250529

Claims (10)

  1. 1. An electric vehicle hub motor comprising: a hub (1); the left end cover (2) and the right end cover (3), wherein the left end cover (2), the right end cover (3) and the hub (1) are enclosed and form a containing cavity; a motor shaft (4), wherein the motor shaft (4) penetrates through the left end cover (2) and the right end cover (3); The stator assembly is arranged in the accommodating cavity and comprises a stator core (5), a plurality of first coil windings (6) and a plurality of second coil windings (7), the stator core (5) is fixedly arranged on the motor shaft (4), the stator core (5) comprises a left iron core and a right iron core which are integrally formed, the left iron core is alternately provided with a plurality of first stator teeth (8) and a plurality of first stator grooves (9) along the circumferential direction, the right iron core is alternately provided with a plurality of second stator teeth (10) and a plurality of second stator grooves (11) along the circumferential direction, the notch of the first stator grooves (9) and the notch of the second stator grooves (11) face towards the two axial sides of the motor shaft (4), the first coil windings (6) and the first stator teeth (8) are in one-to-one correspondence, the first coil windings (6) are wound on the first stator teeth (8), the second coil windings (7) and the second stator teeth (10) are in one-to-one correspondence, and the second coil windings (7) are wound on the second stator teeth (10); The left rotor magnetic steel (12) is arranged in the left end cover (2) and corresponds to the left iron core; the right rotor magnetic steel (13), the right rotor magnetic steel (13) is installed in the right end cover (3) and corresponds to the right iron core.
  2. 2. The electric vehicle hub motor according to claim 1, characterized in that the stator assembly further comprises a support frame (14), the support frame (14) is fixedly mounted on the motor shaft (4), and the stator core (5) is fixedly sleeved on the outer peripheral wall of the support frame (14).
  3. 3. The electric vehicle hub motor according to claim 1, wherein the left rotor magnet steel (12) includes a plurality of first magnet steel bodies, a plurality of first magnet steel bodies are uniformly arranged along a circumferential direction, and a plurality of first magnet steel bodies are all adhered in the left end cover (2), the right rotor magnet steel (13) includes a plurality of second magnet steel bodies, a plurality of second magnet steel bodies are uniformly arranged along a circumferential direction, and a plurality of second magnet steel bodies are all adhered in the right end cover (3).
  4. 4. The electric vehicle in-wheel motor of claim 3, wherein the first magnetic steel body and the second magnetic steel body are both fan-shaped.
  5. 5. The electric vehicle hub motor according to claim 3, wherein the first magnetic steel body is provided with first chamfer at both ends along its length direction, and the second magnetic steel body is provided with second chamfer (15) at both ends along its length direction.
  6. 6. An electric vehicle hub motor according to any of claims 1-5, characterized in that the left rotor magnet steel (12) is arranged spaced from the left core forming a first axial air gap (16) and the right rotor magnet steel (13) is arranged spaced from the right core forming a second axial air gap (17).
  7. 7. An electric vehicle hub motor according to any of claims 1-5, characterized in that two opposite and spaced apart side walls of the first stator tooth (8) are parallel to each other and that two opposite and spaced apart side walls of the second stator tooth (10) are parallel to each other.
  8. 8. Electric vehicle hub motor according to any of claims 1-5, characterized in that the notch of the first stator groove (9) and the notch of the second stator groove (11) are both V-shaped.
  9. 9. The electric vehicle hub motor of any of claims 1-5, wherein the left core has a first yoke portion and the right core has a second yoke portion, the first yoke portion coinciding with the second yoke portion.
  10. 10. The electric vehicle hub motor according to any one of claims 1-5, further comprising a first bearing (18) and a second bearing (19), wherein an outer ring of the first bearing (18) is fixedly connected to the left end cover (2), an inner ring of the first bearing (18) is fixedly sleeved on the motor shaft (4), an outer ring of the second bearing (19) is fixedly connected to the right end cover (3), and an inner ring of the second bearing (19) is fixedly sleeved on the motor shaft (4).

Description

Electric vehicle hub motor Technical Field The utility model relates to the technical field of motors for electric vehicles, in particular to an electric vehicle hub motor. Background With the development and popularization of vehicles, the electric two-wheel vehicle plays an increasingly important role in daily travel of people, and meanwhile, with the development of technology and the trend of facilitating carbon neutralization and electrodynamic properties, the electric two-wheel vehicle can gradually replace the traditional fuel motorcycle. The hub motor is high in reliability and small in size, is usually used as a main motor structure form of the electric bicycle, is structurally generally in a direct-drive mode of an outer rotor and a stator, and is mainly used for providing continuous and stable power for the electric bicycle through the outer rotor, and the hub motor does not need any transmission system, has the characteristics of high driving efficiency, compact structure, high reliability and the like, and the existing direct-drive hub motor for the electric bicycle has limited adaptability to loads, particularly has the purpose of maximizing climbing performance, namely torque maximization under the condition of heavy load and heavy torque, and also needs to provide higher requirements for the running power of the hub motor of the electric bicycle. Disclosure of utility model The utility model aims to provide an electric vehicle hub motor which can realize double-power axial output and effectively improve motor torque and power density. In order to achieve the above purpose, the utility model adopts the following technical scheme: the present utility model provides an electric vehicle hub motor comprising: A hub; The left end cover, the right end cover and the hub are enclosed to form a containing cavity; The motor shaft penetrates through the left end cover and the right end cover; The stator assembly is arranged in the accommodating cavity and comprises a stator iron core, a plurality of first coil windings and a plurality of second coil windings, the stator iron core is fixedly arranged on the motor shaft and comprises an integrally formed left iron core and a right iron core, the left iron core is alternately provided with a plurality of first stator teeth and a plurality of first stator grooves along the circumferential direction, the right iron core is alternately provided with a plurality of second stator teeth and a plurality of second stator grooves along the circumferential direction, the notch of the first stator grooves and the notch of the second stator grooves face to the two axial sides of the motor shaft, the first coil windings and the first stator teeth are in one-to-one correspondence, the first coil windings are wound on the first stator teeth, the second coil windings are in one-to-one correspondence with the second stator teeth, and the second coil windings are wound on the second stator teeth; The left rotor magnetic steel is arranged in the left end cover and corresponds to the left iron core; And the right rotor magnetic steel is arranged in the right end cover and corresponds to the right iron core. As an optimized technical scheme of the electric vehicle hub motor, the stator assembly further comprises a support frame, the support frame is fixedly arranged on the motor shaft, and the stator core is fixedly sleeved on the peripheral wall of the support frame. As a preferred technical scheme of the electric vehicle hub motor, the left rotor magnetic steel comprises a plurality of first magnetic steel bodies, the first magnetic steel bodies are uniformly arranged along the circumferential direction, the first magnetic steel bodies are uniformly bonded in the left end cover, the right rotor magnetic steel comprises a plurality of second magnetic steel bodies, the second magnetic steel bodies are uniformly arranged along the circumferential direction, and the second magnetic steel bodies are uniformly bonded in the right end cover. As a preferable technical scheme of the electric vehicle hub motor, the first magnetic steel body and the second magnetic steel body are fan-shaped. As a preferred technical scheme of the electric vehicle hub motor, the first magnetic steel body is provided with first chamfer angles along two ends of the length direction of the first magnetic steel body, and the second magnetic steel body is provided with second chamfer angles along two ends of the length direction of the second magnetic steel body. As an preferable technical scheme of the electric vehicle hub motor, the left rotor magnetic steel and the left iron core are arranged at intervals to form a first axial air gap, and the right rotor magnetic steel and the right iron core are arranged at intervals to form a second axial air gap. As a preferable technical scheme of the electric vehicle hub motor, two opposite side walls of the first stator tooth and arranged at intervals are parallel t