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US 5,977,669 AGranted
Fastening means for contacting DC-output terminal with cooling fin in AC generator
AssigneeDenso Corporation
InventorsKo Yoshida, Tamaki Suzuki, Yusuke Kawano
Life of this patent
Estimating the term…
Abstract
A three-wave rectifying unit of an AC generator has a plus-side cooling fin, a minus-side cooling fin and a DC-output terminal. The DC-output terminal is made of a metal plate which is harder than the plus-side cooling fin to provide tight mechanical connection. The DC-output terminal, the plus-side cooling fin, a plus-side brush terminal and a plus-side terminal of a voltage regulator are fastened together and electrically connected by a screw which is screwed into a portion of the DC-output terminal.
Claims12
An AC generator comprising:
- a housing;
- a rotor supported by said housing and having a field coil and two slip rings;
- a stator supported by said housing and having a stator winding;
- a brush unit having a brush terminal in contact with one of said two slip rings;
- a rectifying unit having a plurality of plus-side rectifying elements, a plus-side cooling fin holding said plus-side rectifying elements, a plurality of minus-side rectifying elements, a minus-side cooling fin holding said minus-side rectifying elements and a terminal portion integral with said plus-side cooling fin;
- a DC-output terminal made of a conductive metal having a hardness greater than that of which said plus-side cooling fin is made, said DC-output terminal having a contacting portion and a rod portion extending in a radially outward direction from said contacting portion, said contacting portion defining a first hole and a second hole spaced apart from each other;
- first fastening means, disposed in said first hole, for mechanically connecting said contacting portion and said plus-side cooling fin, thereby maintaining a distance between said plus-side cooling fin and said minus-side cooling fin;
- and
- second fastening means, disposed said second hole, for mechanically and electrically connecting said contacting portion of said DC-output terminal, said brush terminal and said terminal portion of said plus-side cooling fin,
- wherein said first fastening means includes a member extending through said first hole, an insulating spacer disposed between said plus-side cooling fin and said minus side cooling fin, and
- said second fastening means includes a male screw and a female screw thread disposed at said second hole to provide electrical contact.
8 more elements
An AC generator comprising:
- a housing,
- a rotor supported by said housing and having a field coil and two slip rings;
- a stator supported by said housing and having a stator winding;
- a brush unit having a brush terminal in contact with one of said two slip rings, said brush terminal having a through hole formed therein;
- a rectifying unit having a plurality of plus-side rectifying elements, a plus-side cooling fin holding said plus-side rectifying elements, a plurality of minus-side rectifying elements, a minus-side cooling fin holding said minus-side rectifying elements and a terminal portion integral with said plus-side cooling fin, said terminal portion having a through hole formed therein;
- a DC-output terminal made of a conductive metal having a hardness greater than that of which said plus-side cooling fin is made, said DC-output terminal defining first and second holes spaced apart from each other;
- a first fastener, disposed at said first hole, for securing said plus-side and minus-side cooling fins at a distance;
- and
- a second fastener fixed to said second hole, said second fastener having a male screw that extends through said through hole of said brush terminal and said through hole of said terminal portion of said plus-side cooling fin and a female screw that is formed in said second hole of said DC-output terminal to fix said male screw to said DC-output terminal, said brush terminal and said terminal portion of said plus-side cooling fin
- wherein said first fastener comprises a member extending through said first hole, an insulating spacer disposed between said plus-side cooling fin and said minus-side cooling fin.
7 more elements
An AC generator including:
- a housing;
- a rotor supported by said housing;
- a stator supported by said housing and having a stator winding;
- a brush unit;
- a regulator;
- a terminal member connected to at least one of said brush unit and said regulator;
- a rectifying unit having a plurality of plus-side rectifying elements, a plus-side cooling fin holding said plus-side rectifying elements, an insulating member, a plurality of minus-side rectifying elements and a minus-side cooling fin;
- a DC-output terminal having a first contacting portion and a second contacting portion spaced apart from said first contacting portion in a radial direction of said stator, said first contacting portion having a through hole and said second contacting portion having a female screw;
- a rivet member, disposed at said first contacting portion to extend through said DC-output terminal, said plus-side cooling fin, said insulating member and said minus-side cooling fin, said rivet member mechanically connecting said DC-output terminal, said plus-side cooling fin and said minus-side cooling fin;
- and
- a male screw disposed at said second contacting portion, said male screw directly connecting said DC-output terminals, said terminal member and said plus-side cooling fin.
8 more elements
Dependencies are inferred from the claim text.