Motor brush assembly

• US 4,673,837 A
• Filed: 11/12/1985
• Issued: 06/16/1987
• Est. Priority Date: 05/11/1984
• Status: Expired due to Fees

• Current Assignee: AMP Incorporated (Johnson Controls International plc)
• Original Assignee: AMP Incorporated (Johnson Controls International plc)
• Inventors: Rose, William H., Shaffer, David T., Granitz, Richard F., Gingerich, David J.
• Primary Examiner(s): SKUDY, ROBERT
• Application Number:
  US06/807,775
• Time in Patent Office: 581 Days
• Field of Search: 310/239, 310/68 R, 310/241, 310/68 C, 310/242, 310/248, 310/245, 310/216, 310/42, 310/43, 310/240, 310/71, 310/72, 310/244, 310/89, 310/246, 310/247, 310/51, 29/597, 29/827, 29/883, 29/884, 339/97 R, 339/97 P, 339/98, 339/99
• US Class Current: 310/239
• CPC Class Codes: H02K 11/026 Suppressors associated with brushes, brush holders or their supports
• CPC Class Codes: H02K 11/40 Structural association with grounding devices
• CPC Class Codes: H02K 2211/03 Machines characterised by circuit boards, e.g. pcb
• 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
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly
• CPC Class Codes: Y10T 29/49121 Beam lead frame or beam lead device

Abstract

A motor brush assembly comprises a stamped and formed lead frame including electrical terminals at spaced locations and a dielectric housing member secured onto the lead frame with the electrical terminals being exposed and accessible for electrical termination to electrical power wires and lead wires of capacitors and inductors. Cavities are located in the housing member in which the inductors are disposed. Metal brush holders are positioned in brush holder locations on the housing member and lugs thereof are electrically stapled onto the lead frame. Openings are located in the housing member exposing severable sections of the lead frame separating the lead frame into separate brush circuits. If inductors are to be disposed in the circuit path between the terminated power leads and the brush holder locations, the respective severable sections are also severed which interconnect the lead frame between the associated pairs of terminals corresponding to each inductor. A ground terminal extends outwardly from the housing member.

Claims

1. A motor brush assembly, comprising:

a stamped and formed lead frame including a large central aperture, plate sections for engagement with respective metal brush holders, pairs of first electrical terminals, and a pair of second electrical terminals each having conductor-connecting means for electrical connection with power wires, one of each pair of said first terminals being electrically connected to a respective said plate section and the other of each pair of said first terminals being electrically connected to a ground contact extending outwardly from said lead frame, said lead frame having first severable sections between the terminals of each said pair of first terminals;

a dielectric housing member secured onto said lead frame with conductor-connecting means of said first and second terminals extending outwardly from said housing member for electrical connection to respective said leads, said housing member having a circular wall around said large central aperture of said lead frame defining a central opening, and said housing member having first openings exposing said first severable sections;

said metal brush holders disposed in brush holder channels on said housing member and having integral lug sections secured to respective said plate sections in electrical engagement therewith, and including brush-receiving sections in communication with said central opening; and

capacitors having leads electrically connected to conductor-connecting means of respective said pairs of first electrical terminals to provide noise suppression, said ground contact extending outwardly from said housing member, and said first severable sections being severed thereby separating said lead frame into separate electrical sections.

2. A motor brush assembly as set forth in claim 1, wherein said lead frame further includes pairs of third electrical terminals each having conductor-connecting means extending outwardly from said housing member, one of each pair of said third terminals being electrically connected to a respective said plate section and the other of each pair being electrically connected to one of said second terminals, said lead frame includes second severable sections between the terminals of each said pair of third terminals, said second severable sections being disposed in second openings of said housing member thereby being exposed.

3. A motor brush assembly as set forth in claim 2 wherein inductors are electrically connected to said conductor-connecting means of respective said pairs of third terminals, and said second severable sections of said lead frame are severed further separating said lead frame into further separate electrical sections.

4. A motor brush assembly as set forth in claim 2 wherein said housing member includes walls defining cavities in which inductors are to be disposed, said walls having substantially opposing slots in which said conductor-connecting means of said third electrical terminals are disposed to enable the leads of said inductors to be terminated thereto.

5. A motor brush assembly as set forth in claim 4 wherein said conductor-connecting means of said first and said second and said third terminals extend substantially normally upwardly from the plane of said lead frame and comprise insulation-displacement sections.

6. A motor brush assembly as set forth in claim 1 wherein said conductor-connecting means of said first and second terminals extend substantially normally upwardly from the plane of said lead-frame and comprise insulation displacement sections.

7. A motor brush assembly as set forth in claim 1 wherein a strain relief section is provided by said dielectric housing member in which said power wires are to be disposed.

8. A motor brush assembly as set forth in claim 1 further including a metal housing member secured thereto engaging said ground contact to form a ground connection therewith, said metal housing member including a bearing member in alignment with said central opening of said dielectric housing member.

9. A continuous strip of motor brush assemblies, comprising:

carrier straps having stamped and formed lead frames extending therebetween, each said lead frame including a large central aperture, plate sections for electrical engagement with respective metal brush holder members, pairs of first electrical terminals each having conductor-connecting means for electrical connection with leads of respective first noise suppression components, and a pair of second electrical terminals each having conductor-connecting means for electrical connection with power wire leads, ones of each pair of said first terminals being electrically connected to a respective said plate section and the other of each pair of said first terminals being electrically connected to a ground contact extending outwardly from said lead frame, said lead frame having first severable sections between the terminals of each said pair of first terminals; and

dielectric housing members each molded onto a respective said lead frame outwardly from which extend said conductor-connecting means of said first and second terminals for electrical connection to respective leads, each said housing member having a circular wall around said large central aperture of said lead frame defining a central opening, and further having brush holder channels in communication with said central opening within which said metal brush holder members can be disposed in secured electrical engagement with respective said plate sections, and further having first openings exposing said first severable sections of said lead frame to be severed.

10. A continuous strip of motor brush assemblies as set forth in claim 9, wherein each said lead frame further includes pairs of third electrical terminals each having conductor-connecting means extending outwardly from the housing member associated with said lead frame for electrical connection with leads of respective second noise suppression components, one of each pair of said third terminals being electrically connected to a respective said plate section and the other of each pair being electrically connected to one of said second terminals, said lead frame including second severable sections between the terminals of each said pair of third terminals and disposed in second openings of said housing member thereby being exposed to be severed.

11. A continuous strip of motor brush assemblies as set forth in claim 10 wherein said housing member includes walls defining cavities in which respective said second noise suppression components are to be disposed, said walls having substantially opposing slots in which said conductor-connecting means of said third electrical terminals are disposed to enable the lead wires of said second noise suppression components to be terminated thereto.

12. A continuous strip of motor brush assemblies as set forth in claim 9 wherein said conductor-connecting means of said first and second terminals extend substantially normally upwardly from the plane of each said lead frame and comprise slotted termination sections of the insulation displacement type.