Commutator type rotary electric machine

A rotary electric machine comprising:

• an end bracket made of a heat conductive material;
• armature means rotatably supported by said end bracket and including electric conductors forming a part of an armature coil and extending radially toward an axis of said armature means, said radially extending electric conductors being constructed and arranged to generate a centrifugal air flow;
• brush means for supplying electric current to said electric conductors when contacted with said electric conductors;
• holder means made of heat conductive metal and fixed to said end bracket for movably receiving said brush means therein, said holder means being formed at a plurality of locations spaced apart from each other;
• insulator means interposed between said brush means and said holder means for electrically insulating said brush means from said end bracket, while keeping heat conduction relation between said brush means and said holder means;
• and
• cover means made of electrical insulator material and covering said holder means and said end bracket therein.

A rotary electric machine comprising:

• end bracket made of a heat conductive material;
• armature means rotatably supported by said end bracket and including electric conductors forming a part of armature coil;
• brush means for supplying electric current to said electric conductors when contacted with said electric conductors;
• holder means made of heat conductive metal and fixed to said end bracket for movably receiving said brush means therein;
• insulator means interposed between said brush means and said holder means for electrically insulating said brush means from said end bracket, while keeping heat conduction relation between said brush means and said holder means;
• and
• cover means made of an electric insulator material and covering said holder means, said cover means being formed integrally with said insulator means.

A commutator type rotary electric machine comprising:

• a housing;
• an armature core made of metal and disposed rotatably in said housing;
• a commutator disposed on an axial side end of said armature core, said commutator including an internal conductor and an external conductor both extending radially along said axial side end, a first insulator disposed between said armature core and said internal conductor, and a second insulator disposed between said internal conductor and said external conductor, said commutator being constructed and arranged to generate a centrifugal air flow;
• an end bracket made of a metal and coupled with said housing to close an axial open end of said housing;
• and
• a brush slidably supported in said end bracket and contacting axially said external conductor of said commutator, said brush being held in a first heat conduction relation with said armature core through said commutator and in a second heat conduction relation with said end bracket.

A commutator type rotary electric machine comprising:

• a housing;
• an armature core having a shaft and disposed in said housing;
• a commutator disposed on an axial side end of said armature core, the commutator being constructed and arrange to generate a centrifugal air flow;
• a brush axially contacting said commutator;
• an end bracket made of a heat conductive material, disposed close to and in parallel with said commutator, coupled with said housing to close an axial open end of said housing, and supporting said shaft;
• a brush holder made of a heat conductive material and supported in said end bracket, said brush holder supporting said brush axially slidably therein;
• and
• a cover disposed away from said commutator and covering therein said brush, said end bracket and said brush holder.

A commutator type rotary electric machine comprising:

• a housing;
• an armature core made of metal and disposed rotatably in said housing;
• a commutator disposed on an axial side end of said armature core, said commutator including an internal conductor and an external conductor both extending radially along said axial side end, said armature core and said internal conductor being electrically insulated from each other, and said internal conductor and said external conductor being electrically insulated from each other, said commutator being constructed and arranged to generate a centrifugal air flow;
• an end bracket made of a metal and coupled with said housing to close an axial open end of said housing;
• and
• a brush slidably supported in said end bracket and contacting axially said external conductor of said commutator, said brush being held in a first heat conduction relation with said armature core through said commutator and in a second heat conduction relation with said end bracket.