Anti-separating structure of sensing magnet for EPS motor

Patent metadata

Field	Value
Publication number	US-9800121-B2
Application number	US-201615152057-A
Country	US
Kind code	B2
Filing date	May 11, 2016
Priority date	Jul 22, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Disclosed is an anti-separating structure of a sensing magnet for EPS motor, the structure being a coupling structure between the sensing magnet and a plate of the EPS motor, the structure including a disk-shaped plate formed with a magnet accommodation unit protrusively formed near at a rotation shaft, a ring-shaped sensing magnet centrally formed with a through hole having a diameter corresponding to the magnet accommodation unit, and magnet grip units each formed at a predetermined gap along a circumferential surface of the magnet accommodation unit.

First claim

What is claimed is:

1. An anti-separating structure of a sensing magnet for an EPS motor, the structure comprising:
a disk-shaped plate having a hole in the center;
a magnet accommodation unit protrusively formed near the hole inserted by a rotation shaft;
a ring-shaped sensing magnet centrally formed with a through hole having a diameter corresponding to the magnet accommodation unit; and
a magnet grip unit formed by caulking a periphery of the magnet accommodation unit to grip the sensing magnet,
wherein the caulked magnet grip unit comprises a plurality of spots each formed on a circumferential surface of the magnet accommodation unit.

2. The structure of claim 1 , wherein the plate is coated with an adhesive on a surface opposite to the sensing magnet.

3. The structure of claim 1 , wherein an outmost diameter of the sensing magnet corresponds to a diameter of the plate.

4. The structure of claim 1 , wherein the spots of the magnet grip unit are formed at a predetermined gap along a circumference of the magnet accommodation unit.

5. The structure of claim 4 , wherein the spots of the magnet grip unit are formed by caulking a total of 12 positions of the circumference of the magnet accommodation unit at a 30-degree gap.

6. The structure of claim 4 , wherein each spot of the magnet grip unit is sized to obtain a processing convenience.

7. An EPS motor having the anti-separating structure of claim 1 , the EPS motor comprising:
a housing;
a stator disposed in the housing and wound with a coil; and
a rotor centrally formed in the stator and rotatable by the rotation shaft.

8. The EPS motor of claim 7 , further comprising a cover member coupled to an upper surface of the housing.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Taehwan
• Woo Shunghun
• Chang Donggeun
• Kim Byungyong

Classifications

• H02K11/215 Primary

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K1/28

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

• H02K11/21

  Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) · CPC title

• H02K5/22

  Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes · CPC title

• H02K29/08 Primary

  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) · CPC title