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CN-224218173-U - Brushless motor and brushless motor structure thereof

CN224218173UCN 224218173 UCN224218173 UCN 224218173UCN-224218173-U

Abstract

The utility model provides a brushless motor and a brushless motor structure thereof, wherein a stator, a rotor (201) and a motor shaft (2), and among a plurality of flat magnetic steels (6) which are attached to each other along the circumferential direction and are attached to a mounting surface (71) of the stator (101) along the radial inward direction of the rotor (201), adjacent magnetic steels (6) are directly combined, wherein the direct combination comprises direct contact or an integral component. The utility model adopts the structure of direct combination between adjacent magnetic steel and magnetic steel, and compared with the structure of indirect combination, the utility model improves the magnetic performances of magnetic flux maximum value, air gap magnetic induction effective value and the like in unit length.

Inventors

  • HUANG HONGYUE
  • SHU WEIFANG

Assignees

  • 安乃达驱动技术(上海)股份有限公司

Dates

Publication Date
20260508
Application Date
20250321

Claims (10)

  1. 1. A brushless motor structure is characterized by comprising a stator (101), a rotor (201) and a motor shaft (2), wherein the stator (101) is fixedly arranged with the motor shaft (2), the rotor (201) surrounds the stator (101), the rotor (201) is arranged on the motor shaft (2) through a bearing, a winding (3) of the stator (101) is electrically connected with an outgoing line (1), and the outgoing line (1) extends to the outside of the motor shaft (2); In a plurality of circumferentially arranged flat magnetic steels (6) attached to a mounting surface (71) of a rotor (201) radially inward toward a stator (101), adjacent magnetic steels (6) are directly bonded, wherein the direct bonding includes direct contact or is an integral component.
  2. 2. A brushless motor structure according to claim 1, characterized in that the plurality of magnetic steels (6) are independent members, and the direct bonding means that the circumferentially adjacent magnetic steels (6) are in direct contact with each other after being attached to the mounting surface (71).
  3. 3. A brushless motor structure according to claim 2, characterized in that the side surfaces (60) of adjacent magnet steels (6) are in direct contact with each other, the inner surfaces (61) of the magnet steels (6) are parallel to the outer surfaces (62), and the side surfaces (60) of the magnet steels (6) are convex cambered surfaces; Or alternatively, the method can be used for processing, The edges (610) of the inner surfaces (61) of the adjacent magnetic steels (6) are in direct contact, the magnetic steels (6) are rectangular magnetic steels, and the edges (610) are right-angle structures or chamfer structures between the inner surfaces (61) and the side surfaces (60) of the magnetic steels (6).
  4. 4. A brushless motor structure according to claim 1, characterized in that the direct coupling means that the plurality of magnetic steels (6) are always connected as a unitary annular member.
  5. 5. A brushless motor structure according to claim 4, characterized in that an opening at one axial end of the rotor (201) allows the plurality of magnetic steels (6) of the one-piece member to enter the rotor (201) in the axial direction and to be mounted to the mounting surface (71).
  6. 6. A brushless motor structure according to claim 1, characterized in that, among a plurality of flat plate-like magnetic steels (6) arranged in the circumferential direction, to which the mounting surface (71) of the rotor (201) is fitted radially inward toward the stator (101), all or a part of the side surfaces (60) of the adjacent magnetic steels (6) are directly bonded; Or alternatively, the method can be used for processing, In a plurality of plate-shaped magnetic steels (6) which are arranged along the circumferential direction and are attached to a mounting surface (71) of a stator (101) radially inwards of a rotor (201), edges (610) of inner surfaces (61) of all or a part of adjacent magnetic steels (6) are directly combined.
  7. 7. A brushless motor structure according to any one of claims 1 to 6, characterized in that the mounting surface (71) of the rotor (201) facing radially inwards towards the stator (101) is a plane matching the outer surface (62) of the magnet steel (6).
  8. 8. A brushless motor structure according to claim 7, characterized in that the planes provided by the plurality of mounting surfaces (71) are formed in a polygonal shape around.
  9. 9. The brushless motor structure of claim 8, wherein the polygon is a regular polygon.
  10. 10. A brushless motor comprising a housing, further comprising the brushless motor structure of any one of claims 1 to 9 in the housing.

Description

Brushless motor and brushless motor structure thereof Technical Field The utility model belongs to the technical field of motors, and particularly relates to a brushless motor and a brushless motor structure thereof. Background Patent document CN201623552U published in 11 month of 2010 discloses a rotor structure of an outer rotor brushless motor, and a gap is reserved between magnetic steel and the magnetic steel so as to carry out injection molding or filling of fixed glue, namely, the magnetic steel is not in direct contact with the magnetic steel. Patent document CN204721125U published in 2015, 10 month and 21 days discloses a rotor structure of an outer rotor brushless motor, compared with the patent document CN201623552U, a magnetic steel groove is additionally arranged, a parting bead is arranged between magnetic steel and magnetic steel, and the magnetic steel is still not in direct contact with the magnetic steel. Patent document CN110165806a published in 2019 at 08 and 23 discloses a rotor structure of an outer rotor brushless motor, compared with parting strips of patent document CN204721125U, magnetic isolation grooves communicated with the magnetic steel grooves are further formed at two ends of each magnetic steel groove, magnetic isolation filling blocks are arranged in the magnetic isolation grooves, magnetic steels are not in direct contact, and the magnetic circuit relationship between the magnetic steels is further weakened by adopting the magnetic isolation filling blocks. Patent document CN218071134U published by 12 months and 16 days in 2022, which improves the above patent documents, discloses a rotor structure of an external rotor brushless motor, and compared with patent documents CN201623552U, CN204721125U and CN110165806a, a magnetic conduction ring is additionally arranged between magnetic steel and the inner side wall of a rotor shell, so that the magnetic circuit relationship between the magnetic steel and the magnetic steel is enhanced, but the cost is that an additional magnetic conduction ring is required, the magnetic steel is arranged between two adjacent positioning protrusions of the magnetic conduction ring to be separated from each other, and a route of direct contact between the magnetic steel and the magnetic steel is not adopted, namely, the magnetic steel is still not in direct contact with the magnetic steel. Disclosure of utility model In view of the drawbacks of the prior art, an object of the present utility model is to provide a brushless motor and a brushless motor structure thereof. The utility model provides a brushless motor structure, which comprises a stator 101, a rotor 201 and a motor shaft 2, wherein the stator 101 is fixedly arranged with the motor shaft 2, the rotor 201 surrounds the stator 101, the rotor 201 is arranged on the motor shaft 2 through a bearing, a winding 3 of the stator 101 is electrically connected with an outgoing line 1, and the outgoing line 1 extends to the outside of the motor shaft 2; Among the plurality of flat plate-like magnetic steels 6 arranged in the circumferential direction, which are attached to the mounting surface 71 of the stator 101 radially inward, of the rotor 201, adjacent magnetic steels 6 are directly bonded, wherein the direct bonding includes direct contact or is an integral part. Preferably, the plurality of magnetic steels 6 are independent members, and the direct bonding means that the circumferentially adjacent magnetic steels 6 are in direct contact with each other after being attached to the mounting surface 71. Preferably, the side surfaces 60 of adjacent magnetic steels 6 are in direct contact with each other, the inner surfaces 61 of the magnetic steels 6 are parallel to the outer surfaces 62, and the side surfaces 60 of the magnetic steels 6 are convex cambered surfaces; Or alternatively, the method can be used for processing, The edges 610 of the inner surfaces 61 of the adjacent magnetic steels 6 are in direct contact, the magnetic steels 6 are rectangular magnetic steels, and the edges 610 refer to right-angle structures or chamfer structures between the inner surfaces 61 and the side surfaces 60 of the magnetic steels 6. Preferably, the direct connection means that the magnetic steels 6 are always connected together as a whole annular component. Preferably, an opening at one axial end of the rotor 201 allows the plurality of magnetic steels 6 of the one-piece member to enter the rotor 201 in the axial direction and be mounted to the mounting surface 71. Preferably, among the plurality of circumferentially arranged flat-plate-like magnetic steels 6 attached radially inward toward the mounting face 71 of the stator 101, all or a part of the side surfaces 60 of adjacent magnetic steels 6 are directly bonded; Or alternatively, the method can be used for processing, In the plurality of flat plate-like magnetic steels 6 arranged in the circumferential direction, which are attached to the mounting su