Motor-driven screwdriver with variable torque setting for equal

Details Motor-driven screwdriver with variable torque setting for equal Motor-driven screwdriver with variable torque setting for equal

1992-07-14

1994-10-18

Wright, Dirk

Planetary gear transmission systems or components

Electric or magnetic drive or control

With condition responsive control

81473, 192150, F16H 3510, F16D 706, B25B 2314

Patent

active

053563506

ABSTRACT:
A motor-driven machine with variable torque setting feature, especially a screwing machine with a torque-controlled switching-off feature, has a shaft which is driven by a motor via a transmission for driving a tool, and a setting ring for presetting a torque at which the shaft is to be disconnected from the transmission and/or the motor will be switched off. In order to enable approximately identical torque curves to be achieved for hard and for soft screwing applications, a clutch with a variable tripping torque is provided whose tripping torque can be adjusted via an indexing ring, which latter can be adjusted together with the setting ring.

REFERENCES:
patent: 3613751 (1971-10-01), Juhasz
patent: 3616883 (1971-11-01), Sindelar
patent: 3667250 (1972-06-01), Schnepel
patent: 4006608 (1977-02-01), Vuceta
patent: 4368784 (1983-01-01), Wunsch et al.
patent: 4631992 (1986-12-01), Eckman
patent: 4712456 (1987-12-01), Yuan
patent: 4756216 (1988-07-01), Lo
patent: 4836349 (1989-06-01), Sakamoto et al.
patent: 4869131 (1989-09-01), Ohmori
patent: 4913242 (1990-04-01), Lo
patent: 4923047 (1990-05-01), Fink et al.

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