CONNECTION FOR MOTOR STATOR SEGMENTS

• US 20140132110A1
• Filed: 11/09/2012
• Published: 05/15/2014
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: Nidec Motor Corporation (Nidec Corporation)
• Original Assignee: Nidec Motor Corporation (Nidec Corporation)
• Inventors: Burton, Stephen J., Horst, Gary E.
• Granted Patent: US 9,263,918 B2
• Time in Patent Office: Days
• US Class Current: 310/216.131
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: H02K 1/143 of the horse-shoe type
• CPC Class Codes: H02K 1/18 Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• CPC Class Codes: H02K 11/225 Detecting coils
• CPC Class Codes: H02K 21/185 with the axis of the rotor perpendicular to the plane of the armature
• CPC Class Codes: H02K 2203/12 Machines characterised by the bobbins for supporting the windings
• CPC Class Codes: H02K 29/03 with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
• CPC Class Codes: H02K 29/12 using detecting coils using the machine windings as detecting coil
• CPC Class Codes: H02K 3/524 for U-shaped, E-shaped or similarly shaped cores
• CPC Class Codes: H02K 5/128 using air-gap sleeves or air-gap discs
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06

Abstract

A motor is provided for use in a machine. The motor includes a segmented stator and a resiliently flexible clip. The stator includes a core having spaced apart arms and a yoke. The arms define an opening therebetween, and the yoke spans the opening. The clip is removably retained on the core so as to apply pressure against each arm toward the yoke such that the arms are retained in contact with the yoke.

Claims

1. A stator for use in a motor, said stator comprising:

a core,

said core including a pair of spaced apart arms that define an opening and a removable yoke that spans the opening;

wiring wound around at least one of the arms; and

a resiliently flexible clip removably retained on the core,

said clip being resiliently flexed when retained on the core so as to apply pressure against each arm toward the yoke such that the arms are retained in contact with the yoke.

2. The stator as claimed in claim 1,

said yoke including an end surface,

each of said arms presenting an outer surface,

said clip engaging the end surface and the outer surfaces.

3. The stator as claimed in claim 2,

said clip including a pair of spaced apart legs, each of which engages and applies pressure against a respective one of the outer surfaces such that movement of the arms away from each other and from the yoke is restricted.

4. The stator as claimed in claim 3,

each of said side members including a catch engaging the respective one of the arms.

5. The stator as claimed in claim 4,

each of said arms including a notch that defines a shoulder,

each of said catches being received in the respective one of the notches and engaging the respective one of the notches.

6. The stator as claimed in claim 2,

said clip including a bight extending between and interconnecting the legs,

said bight including a pair of retention members that engage and apply pressure to the end surface of the yoke such that movement of the yoke relative to the arms in a direction at least substantially orthogonal to the end surface is restricted.

7. The stator as claimed in claim 6,

each of said retention members being a flexibly deformable spring element that is resiliently flexed when the clip is retained on the core.

8. The stator as claimed in claim 1,

said yoke including a first pair of projections,

each of said arms including a first shelf,

each of said first projections being configured to abut a corresponding first shelf.

9. The stator as claimed in claim 8,

said yoke including a second pair of projections,

each of said arms including a second shelf,

each of said second projections being configured to abut a corresponding second shelf.

10. The stator as claimed in claim 9,

said second pair of projections extending at least substantially orthogonally relative to the first pair of projections.

11. The stator as claimed in claim 1,

said stator further comprising at least one bobbin configured to be placed on at least one of the arms prior to placement of the yoke across the opening,

said wiring being wound around the at least one bobbin.

12. The stator as claimed in claim 1,

each of said arms presenting opposite ends,

said core being generally C-shaped, with the yoke extending between the arms adjacent common ends thereof.

13. The stator as claimed in claim 12,

each of said arms presenting inner and outer surfaces, with the inner surfaces facing one another and defining therebetween the opening,

said yoke extending between and interconnecting the inner surfaces.

14. The stator as claimed in claim 13,

said clip being generally U-shaped and extending along the yoke, around the ends of the arms, and into engagement with the outer surfaces.

24. The motor as claimed in claim 2,

said second pair of projections extending at least substantially orthogonally relative to the first pair of projections.

15. A motor for use in a machine, said motor comprising:

a rotor rotatable about an axis; and

a stator, said stator including—

a core,

said core including a pair of spaced apart arms that define an opening and a removable yoke that spans the opening,

wiring wound around at least one of the arms, and

a resiliently flexible clip removably retained on the core,

said clip being resiliently flexed when retained on the core so as to apply pressure against each arm toward the yoke such that the arms are retained in contact with the yoke.

16. The motor as claimed in claim 15,

said yoke including an end surface,

each of said arms presenting an outer surface,

said clip engaging the end surface and the outer surfaces.

17. The motor as claimed in claim 16,

said clip including a pair of spaced apart legs, each of which engages and applies pressure against a respective one of the outer surfaces such that movement of the arms away from each other and from the yoke is restricted.

18. The motor as claimed in claim 17,

each of said side members including a catch engaging the respective one of the arms.

19. The motor as claimed in claim 18,

each of said arms including a notch that defines a shoulder,

each of said catches being received in the respective one of the notches and engaging the respective one of the notches.

20. The motor as claimed in claim 16,

said clip including a bight extending between and interconnecting the legs,

said bight including a pair of retention members that engage and apply pressure to the end surface of the yoke such that movement of the yoke relative to the arms in a direction at least substantially orthogonal to the end surface is restricted.

21. The motor as claimed in claim 20,

each of said retention members being a flexibly deformable spring element that is resiliently flexed when the clip is retained on the core.

22. The motor as claimed in claim 15,

said yoke including a first pair of projections,

each of said arms including a first shelf,

each of said first projections being configured to abut a corresponding first shelf.

23. The motor as claimed in claim 22,

said yoke including a second pair of projections,

each of said arms including a second shelf,

each of said second projections being configured to abut a corresponding second shelf.

25. The motor as claimed in claim 15,

said stator further comprising at least one bobbin configured to be placed on at least one of the arms prior to placement of the yoke across the opening,

said wiring being wound around the at least one bobbin.

26. The motor as claimed in claim 15,

each of said arms presenting opposite ends,

said core being generally C-shaped, with the yoke extending between the arms adjacent common ends thereof.

27. The stator as claimed in claim 26,

each of said arms presenting inner and outer surfaces, with the inner surfaces facing one another and defining therebetween the opening,

said yoke extending between and interconnecting the inner surfaces.

28. The stator as claimed in claim 27,

said clip being generally U-shaped and extending along the yoke, around the ends of the arms, and into engagement with the outer surfaces.