Pinion of starter motor for internal combustion engine

Details Pinion of starter motor for internal combustion engine Pinion of starter motor for internal combustion engine

1997-08-15

1999-09-21

Marmor, Charles A

Machine element or mechanism

Engine starters

Automatic

74 7E, 74 7R, 74460, F02N 1934, F16H 5517

Patent

active

059539569

ABSTRACT:
A pinion (7A) of a starter motor for an internal combustion engine, which pinion has an outer peripheral surface formed with gear teeth (7G) and an inner peripheral surface snugly fit with a bearing (8) so that the pinion can slideably move along an output shaft (6) of the starter motor through the medium of the bearing (8). The internal combustion engine is started by the starter motor through a ring gear of the engine which gear is caused to mesh with the gear teeth of the pinion upon starting of the engine. An inner diameter of a tip end portion (7a) of the pinion at which the pinion is brought into contact with the ring gear upon meshing therewith is so dimensioned as to lie between an inner diameter and an outer diameter of the bearing (8) in order to increase the strength of the pinion. The pinion can be realized in a small size and light weight by decreasing the number of teeth thereof while ensuring a desired strength for the output shaft of the starter motor as well as that for the tooth bottom portion of the pinion.

REFERENCES:
patent: 2188902 (1940-04-01), Kauffman
patent: 4631434 (1986-12-01), Asaoka et al.
patent: 4818889 (1989-04-01), Kinoshita
patent: 4855610 (1989-08-01), Morishita et al.
patent: 4926705 (1990-05-01), Morishita et al.
patent: 4958530 (1990-09-01), Jaseck et al.
patent: 5035151 (1991-07-01), Isozumi
patent: 5179864 (1993-01-01), Ueta et al.

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