Two-part end cap assembly

• US 5,563,462 A
• Filed: 08/02/1994
• Issued: 10/08/1996
• Est. Priority Date: 08/11/1993
• Status: Expired due to Term

• Current Assignee: Johnson Electronic S.A.
• Original Assignee: Johnson Electric SA (Johnson Electric Holdings Limited)
• Inventors: Wong, To F., Strobl, Georg
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): WALLACE, MICHAEL J
• Application Number:
  US08/284,152
• Time in Patent Office: 798 Days
• Field of Search: 310/51, 310/68 R, 310/68 C, 310/71, 310/89, 310/40 MM, 310/221
• US Class Current: 310/71
• CPC Class Codes: H01R 39/38 Brush holders
• CPC Class Codes: H02K 11/026 Suppressors associated with brushes, brush holders or their supports
• CPC Class Codes: H02K 11/028 Suppressors associated with the rotor
• CPC Class Codes: H02K 5/145 Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes

Abstract

Choke coils (5) are attached to the inner part (1) of a two-part end cap assembly by means of first and second leads (9 and 30). Contact means (10) attached to the outer part (6) of the assembly are provided with two slotted plugs which each have two legs. On insertion of each slotted plug in a respective slot formed in the external surface of the inner part (1) of the assembly, the two legs of the slotted plug engage opposite sides of a first lead (9) of one choke coil (5) extending transversely across the slot and bite the opposite sides so as to make good electrical and mechanical contact with the first lead. Both legs of each slotted plug are formed with retaining teeth for engagement with the end walls of the slot into which the slotted plug is inserted, to resist withdrawal of the slotted plug from the slot. This helps secure the inner and outer parts in axial engagement.

Claims

1. An end cap assembly, for a fractional horsepower PMDC motor, comprising:

an inner pan having internal and external surfaces;

brush gear mounted on the internal surface of the inner part;

a suppression element mounted on the external surface of the inner part in electrical contact with the brush gear;

an outer part shaped for axial engagement with the inner part and formed with at least one terminal aperture; and

a terminal extending through said aperture;

wherein;

the suppression element has at least one lead mounted on the external surface of the inner part; and

a contact is attached to the terminal and engaged with the lead of the suppression element as a result of axial engagement of the inner and outer parts.

2. The assembly, according to claim 1 wherein:

a slot is formed in the external surface of the inner part;

the lead of the suppression element extends transversely across the slot;

the contact has a slotted plug, for insertion into the slot, having two legs which are respectively engaged with and bite opposite sides of the lead after insertion of the slotted plug into the slot.

3. The assembly, according to claim 2 wherein:

the slot has end walls; and

the slotted plug has retaining teeth formed on its legs for engagement with the end walls to resist withdrawal of the slotted plug from the slot.

4. The assembly, according to claim 2 wherein the terminal is firmly attached to the outer part.

5. The assembly, according to claim 1 wherein:

the outer part has an internal surface which together with the external surface of the inner part, encloses the suppression element;

an auxiliary slot is formed in the internal surface of the outer part;

a further suppression element is mounted on the internal surface of the outer part and has a further lead which extends transversely across the auxiliary slot; and

the contact is provided with an auxiliary slotted plug, inserted into the auxiliary slot, having two legs which are respectively engaged with and bite opposite sides of the further lead after insertion of the auxiliary slotted plug into the auxiliary slot.

6. The assembly, according to claim 5 wherein:

the auxiliary slot has end walls; and

the auxiliary slotted plug has retaining teeth formed on its legs for engagement with the end walls of the auxiliary slot to resist withdrawal of the auxiliary slotted plug from the auxiliary slot.