Coaxial engine starter

Details Coaxial engine starter Coaxial engine starter

1989-01-13

1990-08-07

Pellinen, A. D.

Prime-mover dynamo plants

Electric-starting motor

74 7C, F02N 1500

Patent

active

049470523

ABSTRACT:
A coaxial engine starter comprises an electric motor having a tubular armature rotary shaft and an output rotary shaft disposed at the front end of the electric motor and having at one end a pinion capable of engaging and disengaging an engine ring gear and axially slidably inserted into an inner bore of the armature rotary shaft at the other end. A planetary speed reduction gear including a sun gear formed around the outer periphery of the front end of the armature rotary shaft and a plurality of planetary gears meshing with the sun gear for reducing rotational speed of the armature rotary shaft is provided and an over-running clutch fitted on the output rotary shaft for transmitting the rotation of the armature rotary shaft transmitted through the planetary speed reduction gear to the output rotary shaft, the over-running clutch having a clutch inner member including a front end surface which abuts against a rear end surface of the pinion when output rotary shaft is moved rearward. The coaxial starter further comprises a bearing disposed at a small-diameter step portion formed adjacent to the front end of the sun gear in the outer peripheral portion of the armature rotary shaft and inserted into a clutch outer member, and a spacer portion interposed between the rear end surface of the clutch inner member of the over-running clutch and the side surface of the bearing for transmitting an axial impact applied to the clutch inner member also to the bearing.

REFERENCES:
patent: 4760274 (1988-07-01), Isozumi
patent: 4808836 (1989-02-01), Isozumi et al.

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