Motor and rotor thereof

Patent metadata

Field	Value
Publication number	US-9419482-B2
Application number	US-201313741508-A
Country	US
Kind code	B2
Filing date	Jan 15, 2013
Priority date	Jan 19, 2012
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor.

First claim

What is claimed is:

1. A motor comprising:
a stator;
a rotor to co-operate with the stator in an electromagnetic manner such that the rotor rotates; and
a motor shaft coupled to the rotor, to rotate along with the rotor,
wherein the rotor comprises:
a sleeve having a shaft hole, through which the motor shaft extends;
a plurality of rotor cores spaced apart from one another in a circumferential direction of the rotor;
a plurality of permanent magnets each disposed between adjacent ones of the rotor cores; first and second cover plates disposed at opposite sides of the permanent magnets in an axial direction, each of the first and second cover plates comprising a shaft receiving hole to receive the motor shaft; and
a plurality of support members coupled to at least one of the first and second cover plates, each of the support members comprising a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor, wherein each of the support members further comprises a connection support portion connected to a coupling protrusion after inwardly extending from the magnet support portion in the radial direction of the rotor, to support an axial end of the corresponding permanent magnet.

2. The motor according to claim 1 , wherein:
the first cover plate further comprises coupling holes arranged in the circumferential direction of the rotor; and
each of the support members further comprises the coupling protrusion which protrudes from the magnet support portion in the axial direction to fit in a corresponding one of the coupling holes.

3. The motor according to claim 2 , wherein the coupling protrusion has at least a portion extending outwardly of the first cover plate after passing through the corresponding coupling hole.

4. The motor according to claim 3 , wherein the coupling protrusion has a head supported by an outer surface of the first cover plate around the corresponding coupling hole.

5. The motor according to claim 1 , wherein the first cover plate further comprises plate grooves each formed at an inner surface of the first cover plate facing the permanent magnets, to receive the connection support portion of a corresponding one of the support members.

6. The motor according to claim 1 , wherein each of the support members further comprises a first coupler provided at one end of the support member, to be coupled to the first cover plate; and
a second coupler provided at the other end of the support member, to be coupled to the second cover plate.

7. The motor according to claim 1 , wherein:
the outer end of each of the permanent magnets is disposed more inwardly in a radial direction of the rotor than outer surfaces of the corresponding rotor cores disposed adjacent to each other in the circumferential direction of the rotor at opposite sides of the permanent magnet;
the rotor further comprises a support member receiving portion defined by the adjacent rotor cores and the outer end of the permanent magnet disposed between the adjacent rotor cores; and
the magnet support portion of the support member corresponding to the permanent magnet is disposed in the support member receiving portion.

8. The motor according to claim 1 , wherein:
the rotor cores comprise first and second rotor cores arranged adjacent to each other in the circumferential direction of the rotor;
the adjacent first and second rotor cores comprise outer support protrusions extending to support a portion of the outer end of the permanent magnet disposed between the adjacent first and second rotor cores, respectively; and
the magnet support portion of the support member corresponding to the permanent magnet is disposed between the outer support protrusion of the first rotor core and the outer support protrusion of the second rotor core.

9. The motor according to claim 1 , wherein the first and second cover plates are forcibly fitted around the motor shaft, to be fixed.

10. The motor according to claim 1 , wherein each of the support members further comprises a non-magnetic body.

11. The motor according to claim 1 , wherein:
each of the rotor cores comprises a side surface facing the corresponding permanent magnet in the circumferential direction of the rotor; and
the side surface of at least one of the rotor cores comprises at least one side protrusion extending toward a side surface of the corresponding permanent magnet.

12. The motor according to claim 11 , wherein the at least one side protrusion comprises a plurality of side protrusions arranged in a radial direction of the rotor.

13. A motor comprising:
a stator;
a rotor to co-operate with the stator in an electromagnetic manner such that the rotor rotates; and
a motor shaft coupled to the rotor, to rotate along with the rotor,
wherein the rotor comprises:
a sleeve having a shaft hole, through which the motor shaft extends;
a plurality of rotor cores spaced apart from one another in a circumferential direction of the rotor;
a plurality of permanent magnets each disposed between adjacent ones of the rotor cores; first and second cover plates disposed at opposite sides of the permanent magnets in an axial direction, each of the first and second cover plates comprising a shaft receiving hole to receive the motor shaft; and
a plurality of support members coupled to at least one of the first and second cover plates, each of the support members comprising a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor,

wherein:
each of the rotor cores comprises a side surface facing the corresponding permanent magnet in the circumferential direction of the rotor;
the side surface of at least one of the rotor cores comprises at least one side protrusion extending toward a side surface of the corresponding permanent magnet; and
the at least one of the rotor core further comprises an aperture formed adjacent to the at least one side protrusion, to assist deformation of the side protrusion.

14. A motor comprising:
a stator;
a rotor to co-operate with the stator in an electromagnetic manner such that the rotor rotates; and
a motor shaft coupled to the rotor, to rotate along with the rotor,
wherein the rotor comprises:
a sleeve having a shaft hole, through which the motor shaft extends;
a plurality of rotor cores spaced apart from one another in a circumferential direction of the rotor;
a plurality of permanent magnets each disposed between adjacent ones of the rotor cores; first and second cover plates disposed at opposite sides of the permanent magnets in an axial direction, each of the first and second cover plates comprising a shaft receiving hole to receive the motor shaft; and
a plurality of support members coupled to at least one of the first and second cover plates, each of the support members comprising a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor, wherein:
each of the rotor cores comprises a side surface facing the corresponding permanent magnet in the circumferential direction of the rotor;
the side surface of at least one of the rotor cores comprises at least one side protrusion extending toward a side surface of the corresponding permanent magnet;
the rotor cores comprise first and second rotor cores arranged adjacent to each other in the circumferential direction of the rotor;
the first rotor core comprises a first side protrusion extending to press a first side surface of the permanent magnet disposed between th

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Jae Young
• An Young Gyu
• Kim Deok Jin
• Kim Young Kwan
• In Byung Ryel
• Han Jin Woo

Classifications

• H02K1/28 Primary

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• H02K1/2773 Primary

  consisting of tangentially magnetized radial magnets · CPC title

• H02K1/278

  Surface mounted magnets; Inset magnets · CPC title

• H02K1/22 Primary

  Rotating parts of the magnetic circuit · CPC title