US 4,800,766 AGranted

Coaxial type starter

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsShuzoo Isozumi, Kazuhiro Odawara

Life of this patent

Estimating the term…

Loading patent…

Abstract

A coaxial type starter used to start an engine of a vehicle is disclosed. The starter comprises first and second bearings which are respectively disposed between the outer circumferential portion of a carrier of an epicyclic reduction gear which is formed integral with a clutch outer member of an overrunning clutch and a fixed portion of the starter and between the inner circumferential portion of the carrier and the outer circumferential portion of an armature rotary shaft of a d.c. motor. Accordingly, the carrier of the epicyclic reduction gear is prevented from becoming eccentric by the first bearing, and the armature rotary shaft of the d.c. motor which is supported by the carrier through the second bearing is also prevented from becoming eccentric. Thus, it is possible to eliminate any risk of the planet gears of the epicyclic reduction gear being damaged or generating noise.

Claims5

Dependent claims

A coaxial type starter including a motor having a tubular armature rotary shaft an output rotary shaft disposed concentrically with said armature rotary shaft at one axial end of said motor and axially slidably supported by said armature rotary shaft, an overrunning clutch for transmitting the rotation of said armature rotary shaft to said output rotary shaft, an epicyclic reduction gear for reducing the speed of rotation which is transmitted from said armature rotary shaft to said output rotary shaft through said overrunning clutch, said reduction gear having a plurality of planet gears rotatably supported through respective pins on a carrier which is formed integral with a clutch outer member of said overrunning clutch, an electromagnetic switch provided at the other axial end of said motor, and an actuating member for applying force for axial movement to said output rotary shaft in response to the action of said electromagnetic switch, wherein the improvement comprises a first bearing disposed between the outer circumferential portion of said carrier of said epicyclic reduction gear which is formed integral with said clutch outer member and a fixed portion of said coaxial type starter, and a second bearing disposed between the inner circumferential portion of said carrier and the outer circumferential portion of said armature rotary shaft.

Dependencies are inferred from the claim text.