AUTOMOTIVE ROTARY ELECTRIC MACHINE

摘要

The present invention provides an automotive rotary electric machine that can suppress unnecessary disengagement of a protective cover by increasing supporting strength for the protective cover.;The automotive rotary electric machine according to the present invention includes: a rectifier and a voltage regulator that are disposed outside a first axial end of a casing; and a resin protective cover that is formed so as to have a cup shape that is constituted by a bottom portion and a cylindrical peripheral wall portion, and that is mounted onto a casing so as to cover the rectifier and the voltage regulator. The protective cover is held by a circuit board of the rectifier by coupling by snap-fitting a plurality of projections that are disposed so as to protrude from an inner circumferential wall surface of the peripheral wall portion to a plurality of projection-engaging portions that are formed on an outer peripheral wall surface of the circuit board so as to be separated circumferentially.

主权项

1. An automotive rotary electric machine comprising:
a rotor that is disposed inside a casing so as to be fixed to a shaft that is rotatably supported by said casing; a stator comprising: a stator core; and a stator winding that is mounted onto said stator core, said stator being supported by said casing so as to surround said rotor; a rectifier that rectifies alternating-current electric power that is generated by said stator winding, said rectifier forming a C shape, and being fixed to said casing so as to be disposed outside a first axial end of said casing in a fan shape that is centered around said shaft in a plane that is perpendicular to said shaft; a voltage regulator that adjusts magnitude of an alternating-current voltage that is generated by said stator, said voltage regulator being disposed outside said first axial end of said casing between two circumferential end portions of said C shape of said rectifier; and a resin protective cover that is formed so as to have a cup shape that is constituted by a bottom portion and a tubular peripheral wall portion, and that is mounted to said casing so as to cover said rectifier and said voltage regulator, wherein: said rectifier comprises a circuit board that comprises: a resin-molded body that is formed so as to have a C shape; a plurality of conductors that are insert-molded into said resin-molded body so as to connect rectifying elements so as to configure a diode bridge; and a plurality of projection-engaging portions that are formed on an outer peripheral wall surface of said resin-molded body so as to be separated circumferentially; and said protective cover comprises a plurality of projections that are disposed so as to protrude from an inner circumferential wall surface of said peripheral wall portion so as to align with said projection-engaging portions, and is held on said casing by means of said circuit board by coupling said projections to said projection-engaging portions by snap-fitting using elasticity of said peripheral wall portion.