Transmission for electrically driven tool

Details Transmission for electrically driven tool Transmission for electrically driven tool

1992-07-31

1995-01-31

Wright, Dirk

Planetary gear transmission systems or components

Electric or magnetic drive or control

With condition responsive control

173176, F16H 128

Patent

active

053855124

ABSTRACT:
Transmission between electric motor and tool shaft, for instance for hand tools such as an electric screwdriver and the like, which transmission is provided with an adjustable breaking coupling for discontinuing the drive torque on the tool shaft when a predetermined resistance moment on this tool shaft is exceeded, wherein the breaking coupling in the form of two mutually slidable parts is provided with a signal generator for controlling a member influencing the motor feed, which signal generator comes into operation as soon as the two parts slide relative to one another when the set torque is exceeded, so that a disengagement takes place between motor and tool shaft immediately after the desired resistance moment is exceeded, wherein the inertia of the rotating parts no longer has any effect on the tool shaft so that it stops immediately.

REFERENCES:
patent: 3993145 (1976-11-01), Findeli
patent: 4108252 (1978-08-01), Stroezel
patent: 4554980 (1985-11-01), Doniwa
patent: 4712456 (1987-12-01), Yuan
patent: 4892013 (1990-01-01), Satoh
patent: 4898249 (1990-02-01), Ohmori
patent: 4991473 (1991-02-01), Gotman

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