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AssigneesFrankl & Kirchner GmbH & Co. KG, KG Fabrik fur Electromotoren u. Electrische Apparate
InventorsKarl Lengsfeld, Erich Link, Hans Erndt
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An electromotive control drive mechanism, in particular for industrial sewing machines, comprises a continuously drivable motor and a brake/clutch unit connected therewith. A clutch disk connected in a rotationally fixed manner with a driven shaft can, by axial movement and by overcoming a clutch air gap, be brought into frictional engagement with a clutch support which is connected in a rotationally fixed manner with the rotor of the motor. A brake disk connected in a rotationally fixed manner with the driven shaft can be brought into frictional engagement with a brake support which is rotationally fixed. A clutch coil and a brake coil are also provided. In order to reduce the expense of the brake/clutch unit without burdensome actuation noises arising, only one clutch/brake disk is provided, and mechanisms are provided for adjusting the clutch air gap and the automatic readjustment of the clutch air gap.
An electromotive control drive for a sewing machine, comprising a motor capable of continuous drive, a driven output shaft, and a clutch/brake unit selectively interconnecting said motor and said driven shaft, said clutch/brake unit comprising a single clutch/brake disk, said disk comprising clutch disk means, means to fix said disk to said driven shaft, clutch lining means fixed to the rotor of said motor and normally positioned with an air gap between said clutch lining means and said clutch disk means, means to automatically readjust the size of said clutch air gap, said single disk further comprising brake means adapted to frictionally contact a fixed portion of said drive to brake the motion of said motor and separate clutch coil means and brake coil means for individually operating said single disk to operate the brake and the clutch of said drive.
Dependencies are inferred from the claim text.