Anti-Separating Structure of Sensing Magnet For EPS Motor

Patent metadata

Field	Value
Publication number	US-2016276908-A1
Application number	US-201615167063-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Jul 22, 2011
Publication date	Sep 22, 2016
Grant date	—

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 centrally inserted by a rotation shaft; a ring-shaped sensing magnet coupled to an upper side of the plate and having a through hole at a center, a first support surface in the through hole and a second support surface protruded adjacent the first support surface a magnet support rib protruded from the plate toward sensing magnet to grip the first support surface of the through hole at the sensing magnet; a holder member inserted into the through hole and coupled to an upper side of the second support surface; and a fixing unit fixing the holder member to the plate, wherein the fixing unit includes a hook protrusively formed from the holder member toward the plate, and a hitching unit penetratively formed at a position corresponding to the hook of the plate.

2 . The structure of claim 1 , wherein the hook is integrally formed with the holder member.

3 . The structure of claim 1 , wherein the hook is centrally formed with a void space inserted by the rotation shaft.

4 . The structure of claim 1 , wherein the fixing unit includes a fastening member coupled to a second through hole penetratively formed at the plate after passing through a first through hole penetratively formed at the holder member.

5 . The structure of claim 4 , wherein the fastening member includes any one of a screw or a rivet.

6 . The structure of claim 1 , wherein the second support surface is protrusively formed at both sides of the first support surface and toward a center of the sensing magnet.

7 . The structure of claim 6 , wherein two first support surfaces are provided facing each other and symmetrically formed based on the center of the sensing magnet, and wherein two second support surfaces are provided facing each other and symmetrically formed on the center of the sensing magnet.

8 . The structure of claim 6 , wherein the second support surface is formed with a slant surface of a predetermined area to allow surface-contacting a surface opposite to the holder member.

9 . The structure of claim 7 , wherein each first support surface is formed in a shape of a concave portion corresponding to that of the magnet support rib.

10 . The structure of claim 4 , wherein the holder member is provided in a thin metal plate of an elastic material to be elastically deformed when fastened to the fastening member.

11 . The structure of claim 1 , wherein the hitching unit is provided in a separate through hole.

12 . 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.

13 . The EPS motor of claim 12 , further comprising a cover member coupled to an upper surface of the housing.

14 . The EPS motor of claim 12 , wherein the fixing unit includes a fastening member coupled to a second through hole penetratively formed at the plate after passing through a first through hole penetratively formed at the holder member.

15 . The EPS motor of claim 14 , wherein the fastening member includes any one of a screw or a rivet.

16 . The EPS motor of claim 13 , wherein the second support surface is protrusively formed at both sides of the first support surface and toward a center of the sensing magnet.

17 . The EPS motor of claim 16 , wherein two first support surfaces are provided facing each other and symmetrically formed based on the center of the sensing magnet, and wherein two second support surfaces are provided facing each other and symmetrically formed on the center of the sensing magnet.

18 . The EPS motor of claim 16 , wherein the second support surface is formed with a slant surface of a predetermined area to allow surface-contacting a surface opposite to the holder member.

19 . The EPS motor of claim 18 , wherein the holder member includes a rib groove supporting a lateral surface of the magnet support rib, and wherein the rib groove is formed at a mid-portion of the magnet support surface.

20 . The EPS motor of claim 19 , wherein the rib groove is formed at a position opposite to the magnet support rib of the plate.

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

• G01D5/20

  by varying inductance, e.g. by a movable armature · CPC title

• H02K29/08 Primary

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