Electromotive servo drive

Details Electromotive servo drive Electromotive servo drive

2006-12-05

2006-12-05

Wright, Dirk (Department: 3681)

Machine element or mechanism

Alternate manual or power operators

Reexamination Certificate

active

07143664

ABSTRACT:
An electromotive servo drive includes a drive motor, a drive train, which is fitted with an output member and includes at least one gear stage for reducing the rotation speed of the motor, and a rotatable hand-operated adjusting shaft for adjusting the output member of the drive train such that at least the drive train, arranged between the adjusting shaft and the output member, is self-locking. One of the gear stages is fitted with a brake element such that the part of the drive train leading from the gear stage to the output member is prevented from returning, while the hand-operated adjusting shaft can freely rotate in both directions of rotation. The brake element is a wrap spring which is rotatably supported in a bushing, and an inner control part engages the wrap spring to couple both angled ends of the wrap spring such that the wrap spring can be expanded in order to obtain a braking effect in a rotation direction.

REFERENCES:
patent: 4499787 (1985-02-01), Leistner et al.
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patent: 6129337 (2000-10-01), Wu
patent: 6725976 (2004-04-01), Oh et al.
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patent: 6805227 (2004-10-01), Schunke et al.
patent: 7069803 (2006-07-01), Schunke et al.
patent: 2005/0109142 (2005-05-01), Schunke et al.

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