Reduction gear mechanism for motor-driven drill incorporating sp

Details Reduction gear mechanism for motor-driven drill incorporating sp Reduction gear mechanism for motor-driven drill incorporating sp

1987-06-30

1988-12-20

Wright, Dirk

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74768, 74785, F16H 344

Patent

active

047918330

ABSTRACT:
A reduction gear mechanism, incorporating a speed changing mechanism, for use with a motor-driven drill. The mechanism includes at least one planetary speed reducer having a sun gear to which rotation of an electric motor is transmitted, a plurality of planet gears arranged around the sun gear and engaged with the sun gear, an internal gear internally engaged with the planet gears, and a planet gear holding plate which pivotally supports the planet gears on one side of it and has an output shaft on the other side of it. The internal gear of at least one planetary speed reducer includes a cylindrical internal gear. The reduction gear includes mechanisms for locking the cylindrical internal gear to prevent rotation of the cylindrical internal gear and for engaging the cylindrical internal gear with the planet gear holding plate so that the cylindrical internal gear and the planet gear holding plate rotate as a single unit.

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patent: 4569252 (1986-02-01), Harper

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