Dewert Antriebs-und Systemtechnik Gmbh & Co Kg

La-z-boy Incorporated

Dewertokin Gmbh

Ralf Bokämper

Andreas Roither

Heinz Lambrecht

Jürgen Martin

Martin Ctvrtnicek

Klaus Wehmeyer

Thomas Viermann

Horst Finkëmeyer

Thomas SCHRÖDER

The invention relates to an electromotive adjustment drive which is operated by a safety voltage, for instance, an adjustment drive for the adjustable components of pieces of furniture. The adjustment drive is equipped with a hand-operated device and a control unit which is operated with the device and connected by at least one cable to a voltage source to which the mains voltage can be supplied. The adjustment drive is so configured as to allow an electrical separation between the voltage source and the transformer, when the adjustment drive is not in operation, without requiring special cables. Furthermore, the adjustment drive should be configured in such a way that the item equipped with the adjustment drive does not contain any cables or lines to which mains voltage is supplied. According to the invention, there is provided a power supply module () which is spatially separated from the control unit () and arranged between the control unit () of the adjustment drive () and the voltage source. Mains voltage is supplied to the power supply module on the input side and safety voltage flows out on the output side. The power supply module () contains at least one transformer () and an upstream power disconnection circuit (). The power chord () leading from the voltage source to the power supply module () is detachably connected by means of a plug-and-socket connector. The power chord is fitted with a plug and the housing of the power supply module () is equipped with a socket receptacle or a jack. The transformer () is an electronic transformer.

Electromotive adjustment drive

An electric-motor drive system having a drive motor and a drive train comprising a worm gear, designed such that the overall dimensions are comparatively small and the pivot angle of rotation of the component cooperating with the output member of the drive system is comparatively large. The worm gear is the output member of the drive train. The worm gear has a central shaped hole for positive-fit connection to a rotatable input member of an adjustable device. The worm gear has a further gear step, preferably a worm drive, on the output side.

Electric-motor-driven actuator

An electromotive linear drive includes one or more drive motors and a corresponding number of torque-reducing transmissions and corresponding driven spindles and a casing. The casing is comprised of two casing parts, whereby the abutting surfaces of the casing parts are sealed by a sealing element or a plurality of sealing elements. Connecting terminals for mechanical and/or electrical components are provided on the exterior of the casing parts.

Electromotive linear drive

An operational check of the safety unit or the safety circuit takes place within the delay time of the relay, assigned to each motor, caused by the pick-up delay or the release delay. Also, the control unit can be equipped such with at least one safety component and/or safety circuit for controlling the control unit that an operational check of the control unit takes place between the operation of an operating element of the hand switch and the starting of the motor or motors. The operating time and the release time of the relay may be delayed by a suitable component so that sufficient time is available for the operational check.

Electric-motor drive

Growing community of inventors

Lübbecke, Germany

Ralf Bokämper