Gear mechanism for accumulator driven electric drill or electric

Details Gear mechanism for accumulator driven electric drill or electric Gear mechanism for accumulator driven electric drill or electric

1994-07-25

1996-09-03

Wright, Dirk

Planetary gear transmission systems or components

Condition responsive control

Overload release

464 39, F16H 3510, B25B 2100

Patent

active

055519270

ABSTRACT:
The preferably for use in an accumulator driven electric drill or electric screwdriver provided gear comprises an overload coupling for limiting torque for the adaptation to various torque loads. The overload coupling is comprised essentially of an annular gear which is formed of a plastic material and which circumscribes and is associated with a planetary gearing, which has an internal teeth which are in engagement with the planetary gear. A spring element presses against the annular gear, in order to press the annular gear axially against a detente wall, so that the annular gear is frictionally prevented from rotation, until a predetermined torque loading is exceeded and upon exceeding of the predetermined torque loading the annular gear is allowed to rotate. For this there is provided between the plastic annular gear and the spring element a metallic cam disk, which is non-rotatingly secured to the annular gear.

REFERENCES:
patent: 2176928 (1939-10-01), Short
patent: 2609118 (1952-08-01), Disser
patent: 3079814 (1963-03-01), Nickstadt
patent: 3587346 (1971-06-01), Takahashi
patent: 3752278 (1973-08-01), States
patent: 4597453 (1986-07-01), Kilmer et al.
patent: 4614134 (1986-09-01), Bohle
patent: 4635489 (1987-01-01), Imamura et al.
patent: 4641551 (1987-02-01), Pascaloff

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