MOTOR HOUSING CONSTRUCTION FOR A VACUUM CLEANER WITH STRAIN-RELIEF FOR MOTOR LEADS

• US 3,826,935 A
• Filed: 09/12/1972
• Issued: 07/30/1974
• Est. Priority Date: 09/12/1972
• Status: Expired due to Term

• Current Assignee: Matsushita Appliance Corporation
• Original Assignee: Bruce E. Samuelson, Keith J. Grierson
• Inventors: Grierson, Keith J., Samuelson, Bruce E.
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): Hickey, Robert J.
• Application Number:
  US05/288,378
• Time in Patent Office: 686 Days
• Field of Search: 310/50,71,42,43,85-90,246-248,93,239,242,89 174/135,136,153 339/61
• US Class Current: 310/71
• CPC Class Codes: H02K 5/08 Insulating casings
• CPC Class Codes: H02K 5/148 Slidably supported brushes
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A motor construction for use such as in a vacuum cleaner or a vacuum cleaner attachment, wherein the motor housing is split to define a pair of housing halves which, when secured together, effect an enclosure for the motor, a strain relief for the motor leads, means for mounting the motor brushes, and means for supporting and positioning the armature and field assemblies.

Claims

1. In an electrical motor having electrically energizeable windings, and an insulated wire lead for providing electrical power to said windings, a housing enclosing the motor having separate portions fixedly juxtaposed to define a tortuous path with said lead extending therethrough, said lead being crimped by said housing portions to define a strain relief mechanical securing of the lead to the housing, said motor housing portions cooperatively definIng an outer pair of shoulders spaced apart a distance approximately equal to the unconstricted thickness of said wire lead, and an inner pair of shoulders spaced apart a distance approximately equal to the unconstricted thickness of said wire lead and offset laterally from said outer pair of shoulders, said shoulders cooperatively clamping said wire lead in a zig-zag configuration.

2. The electrical motor structure of claim 1 wherein one of said shoulders comprises a thin projection for engaging the outer insulation of the wire lead to define a mechanical interlock against longitudinal movement of the wire therepast.

3. The electrical motor structure of claim 1 wherein one of said shoulders of each pair comprises a thin projection for deformably engaging the outer insulation of the wire lead to define a mechanical interlock against longitudinal movement of the wire therepast.

4. The electrical motor structure of claim 1 wherein said shoulders comprise the distal ends of pairs of wall portions of the housing extending flatwise toward each other.

5. The electrical motor structure of claim 4 wherein said housing is formed of electrically insulating material and further includes an integral portion defining an insulative brush holder socket, said motor further including a commutator brush removably received directly in said insulative socket.

6. The electrical motor structure of claim 5 wherein a clip is secured to the housing and retains said brush in said socket, said clip further defining an electrical connection to said brush.

7. The electrical motor structure of claim 5 wherein said electrical insulating material comprises synthetic plastic material.

8. In an electrical motor having electrically energizeably windings, and an insulated wire lead for providing electrical power to said windings, a housing enclosing the motor having separate portions fixedly juxtaposed to define a tortuous path with said lead extending therethrough, said lead being crimped by said housing portions to define a strain relief mechanical securing of the lead to the housing, said motor housing portions cooperatively defining an outer pair of shoulders spaced apart a distance approximately equal to the unconstricted thickness of said wire lead, and an inner pair of shoulders spaced apart a distance approximately equal to the unconstricted thickness of said wire lead and offset laterally from said outer pair of shoulders, said shoulders cooperatively clamping said wire lead in a zig-zag configuration, said motor having an armature assembly and a field assembly and said housing further defining second portions defining means for supporting at least one of said assemblies of said motor.

9. The electrical motor structure of claim 8 wherein said supporting means comprises means for supporting said field assembly.

10. The electrical motor structure of claim 8 wherein said supporting means comprises inwardly projecting ribs formed integrally with said housing.

11. The electrical motor structure of claim 8 wherein said supporting means comprises inwardly projecting ribs formed of an electrically insulating material.