Speed changing mechanism including planet gears and one-way clut

Details Speed changing mechanism including planet gears and one-way clut Speed changing mechanism including planet gears and one-way clut

1991-12-24

1993-01-05

Bonck, Rodney H.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural drive ratios other than unity

475298, F16H 300

Patent

active

051765934

ABSTRACT:
A speed changing mechanism for use with an electric rotary tool, an electric press-attaching tool, an automatic screw tightening tool or the like, includes planet gears, a planet gear support plate integrally formed with an internal gear and provided with an external gear formed outwardly of the internal gear. The planet gears are rotatably supported by a second planet gear support plate mounted on a driven shaft and formed with a second external gear. The planet gears are engaged with the interanl gear and a sun gear provided on a one-way clutch. A cylindrical member having an internal gear is slidably fitted with at least one of the first and second external gears. The speed changing mechanism can be set to have a ratio of the rapid rotation speed to the slow rotation speed of 2.5/1 or less.

REFERENCES:
patent: 832442 (1906-10-01), Archer
patent: 2380390 (1945-07-01), Banker
patent: 2787173 (1957-04-01), Bergles
patent: 3430521 (1969-03-01), Kulman
patent: 3477314 (1969-11-01), Rutkowski
patent: 4063469 (1977-12-01), Bergles
patent: 4938738 (1990-07-01), Fuelberth et al.
patent: 5019023 (1991-05-01), Kurosawa

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