Stator core of rotor

• US 8,970,086 B2
• Filed: 05/30/2012
• Issued: 03/03/2015
• Est. Priority Date: 09/27/2011
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Jo, Jungwoo
• Primary Examiner(s): LE, DANG D
• Application Number:
  US13/483,872
• Publication Number:
  US 20130076200A1
• Time in Patent Office: 1,007 Days
• Field of Search: 310/44, 310/216.008, 310/216.009, 310/216.049, 310/216.066, 310/216.067, 310/216.109, 310/216.135
• US Class Current: 310/216.135
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 15/022 with salient poles or claw-shaped poles

Abstract

A stator core for a motor is disclosed, the stator core including at least one cylindrical stator core body formed in one body by using a metallic mold so that a plurality of teeth is protruded to a same direction each at a predetermined gap, and both distal ends of the stator core body are coupled through a bending process for each horizontal predetermined section about a center of the teeth, and a fixing unit provided at both distal ends of stator core body to fix the stator core body in a cylindrical shape.

Claims

1. A stator core precursor, comprising:

a linear stator core body comprising a plurality of teeth, wherein each tooth is protruded to a same direction at a predetermined gap, wherein the stator core body is one bendable, monolithically-formed body, wherein the stator core body comprises a first distal end and a second distal end;

a first fixing unit including a first pin groove provided at the first distal end of the stator core body; and

a second fixing unit including a second pin groove provided at the second distal end of the stator core body,

wherein the stator core body comprises, between adjacent teeth of the plurality of teeth, a hook unit comprising a hook lug and a complementary lug accommodation groove,

wherein the stator core body further comprises;

a first lateral portion and a second lateral portion protruding outwardly from an outer surface of the first distal end and spaced apart from each other;

a first hitching sill protruding from the first lateral portion towards the second lateral portion;

a second hitching sill protruding from the second lateral portion towards the first lateral portion and spaced apart from the first hitching sill;

a third lateral portion and a fourth lateral portion protruding outwardly from an outer surface of the second distal end and spaced apart from each other;

a third hitching sill protruding from the third lateral portion towards the fourth lateral portion; and

a fourth hitching sill protruding from the fourth lateral portion towards the third lateral portion and spaced apart from the third hitching sill;

wherein the first lateral portion comprises an inner surface facing the second lateral portion,

wherein the second lateral portion comprises an inner surface facing the first lateral portion,

wherein the third lateral portion comprises an inner surface facing the fourth lateral portion,

wherein the fourth lateral portion comprises an inner surface facing the third lateral portion,

wherein the first hitching sill comprises an inner surface facing the outer surface of the first distal end and a lateral surface facing the second hitching sill such that a first opening is present between the lateral surface of the first hitching sill and the lateral surface of the second hitching sill,

wherein the second hitching sill comprises an inner surface facing the outer surface of the first distal end and a lateral surface facing the lateral surface of the first hitching sill;

wherein the third hitching sill comprises an inner surface facing the outer surface of the second distal end and a lateral surface facing the fourth hitching sill such that a second opening is present between the lateral surface of the third hitching sill and the lateral surface of the fourth hitching sill,

wherein the fourth hitching sill comprises an inner surface facing the outer surface of the second distal end and a lateral surface facing the lateral surface of the third hitching sill,

wherein the first pin groove is bounded in part by the outer surface of the first distal end, the inner surface of the first lateral portion, the inner surface of the second lateral portion, the inner surface of the first hitching sill, and the inner portion of the second hitching sill and extends through the first opening between the lateral surface of the first hitching sill and the lateral surface of the second hitching sill, such that the first pin groove has a ‘

T’

shape; and

wherein the second pin groove is bounded in part by the outer surface of the second distal end, the inner surface of the third lateral portion, the inner surface of the fourth lateral portion, the inner surface of the third hitching sill, and the inner portion of the fourth hitching sill and extends through the second opening between the lateral surface of the third hitching sill and the lateral surface of the fourth hitching sill, such that the second pin groove has a ‘

T’

shape.

2. The stator core precursor of claim 1, wherein each of the first and second pin grooves inhibits disengagement of a received fixing pin in a direction perpendicular to a direction of an inserted coupling of the fixing pin.

3. The stator core precursor of claim 1, wherein each of the first and second pin grooves is configured to receive a fixing pin provided with an ‘

H’

shape.

4. The stator core precursor of claim 3, wherein each corner of each of the first and second pin grooves is rounded, such that each of the first and second pin grooves is configured to receive a fixing pin having each corner rounded.

5. A stator core, comprising the stator core precursor of claim 4 bent into a curved shape.

6. The stator core precursor of claim 1, wherein each of the first and second pin grooves is configured to receive a fixing pin having the same thickness as that of the stator core body.

7. The stator core precursor of claim 1, wherein an edge portion of the hook unit in an interlocking complementary structure is rounded.

8. The stator core precursor of claim 1, wherein the hook unit further comprises a gap groove configured to reduce interference during a bending process of the stator core body.

9. The stator core precursor of claim 1, wherein a thickness of the hook unit is the same as that of the first and second distal ends of the stator core body.

10. A stator core, comprising the stator core precursor of claim 9 bent into a curved shape.

11. The stator core precursor of claim 1, wherein the first fixing unit has a first structure, wherein the second fixing unit has a second structure, and wherein the first and second structures are configured such that a fixing pin having an “

H”

shape can be used to couple the first structure to the second structure.

12. A stator core, comprising the stator core precursor of claim 11 bent into a curved shape.

13. A stator core, comprising the stator core precursor of claim 1 bent into a curved shape.