Planetary gear type reduction starter

Details Planetary gear type reduction starter Planetary gear type reduction starter

1985-10-23

1988-10-11

Reese, Randolph A.

Machine element or mechanism

Engine starters

Automatic

74 6, 74 7R, 74462, 74457, F16H 5500, F02N 1100

Patent

active

047762241

ABSTRACT:
A reduction starter employing a planetary gear type reduction gear mechanism having an outer ring gear displaceable radially of a common axis of a central sun gear and an output shaft carrying planet gears for revolution about the common axis. The outer ring gear is formed by an internally toothed ring gear elastically deformable to assure uniform distribution of load torque to all planet gears. The tooth root bending stress of the ring gear is substantially equalized to the outer periphery bending stress thereof to improve the load performance of the planetary gear type reduction gear mechanism and thus reduce the size and weight of the starter. The outer ring gear has an outer rim of a radial thickness t and a plurality of radially inwardly extending teeth each having a height h. The rim thickness t is determined to'fall with a range of from +.ltoreq.0.8 h to +.gtoreq.0.4 h.

REFERENCES:
patent: 820789 (1906-05-01), Hutchins
patent: 1485158 (1924-02-01), Babson
patent: 1814825 (1931-07-01), Cameron
patent: 2248240 (1941-07-01), King
patent: 2756607 (1956-07-01), Mochel
patent: 2956451 (1960-10-01), Bowman
patent: 3081648 (1963-03-01), Duer
patent: 3188888 (1965-06-01), Zink et al.
patent: 4173906 (1979-11-01), Altenbokum et al.
patent: 4503719 (1985-03-01), Hamano
patent: 4590811 (1986-05-01), Kasubuchi

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