Motor housing having simplified cover plate and brush base

• US 6,528,922 B2
• Filed: 07/23/2001
• Issued: 03/04/2003
• Est. Priority Date: 10/06/2000
• Status: Expired due to Fees

• Current Assignee: New Bright Industrial Co., Ltd.
• Original Assignee: New Bright Industrial Co., Ltd.
• Inventors: Lee, Keung
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): NGUYEN, HANH N
• Application Number:
  US09/909,995
• Publication Number:
  US 20020047468A1
• Time in Patent Office: 589 Days
• Field of Search: 310/239, 310/238, 310/90, 310/89
• US Class Current: 310/239
• CPC Class Codes: H01R 39/39 wherein the brush is fixedly mounted in the holder
• CPC Class Codes: H02K 11/40 Structural association with grounding devices
• CPC Class Codes: H02K 5/145 Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
• CPC Class Codes: H02K 5/15 Mounting arrangements for bearing-shields or end plates
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

An end assembly for a miniature motor. The end assembly including a brush base, a pair of brush arms supporting brushes, and a cover plate supporting a rotor bearing. The end assembly fits into an open end of a cylindrical motor housing.

Claims

1. A motor comprising:

a cylindrical housing having an open end with a circular edge and a lip on an inside surface of the housing;

a brush base having an annular collar which fits into the open end of the housing and past the lip, an outside end of the collar includes a recessed planar region defined by a pair of opposed plates, wherein the plates rise above the annular collar and overhang a periphery of the collar such that the plates abut the lip when the base is inserted in the housing to position the brush base in the housing, and

a cover plate sized to fit on said planar region of the brush base, said cover plate having an annular flange to support a rotor bearing.

2. A motor as in claim 1, wherein said brush base further includes a pair of brush arms supporting brushes.

3. A motor as in claim 2, wherein the brush base further includes external connectors attached to the brush arms, extending through the base and protruding outwardly from the outside end of the collar.

4. A motor as in claim 1, wherein the brush base is formed of plastic and the cover plate is metal.

5. A motor as in claim 1, wherein the planar area has posts which insert into apertures of the cover plate, and the posts are permanently press fit to secure the cover plate.

6. A motor as in claim 1, wherein the annular collar has a circular cross section.

7. A motor as in claim 6 wherein the collar has an outer peripheral surface form a substantially uninterrupted annular surface.

8. A motor as in claim 7, wherein said outer peripheral surface of the collar is interrupted by a pair of narrow vertical slots in the surface.

9. A motor as in claim 1, wherein the cover plate is a semi-rectangular plate having a raised disk with the annular flange.

10. A motor as in claim 1, wherein the circular edge of the cylindrical housing includes crimping to hold the cover plate on the brush base.