Demag Cranes & Components Gmbh

Klaus-J&uuml;rgen Winter

J&uuml;rgen Heun

Markus L&ouml;bel

Jorgen Heun

Markus Lobel

Apparatus for slip-free determination of a cable motion in longitudinal cable direction for a hoist, in particular a pneumatically operated cable balancing hoist, which includes a housing, and a cable drum having an outer surface area formed with a groove for receiving a cable. The cable drum is rotatably supported in the housing and moveable in a longitudinal direction in such a way that a run-off point of the cable is at a same location at any time. A sensor is provided to detect markings of the cable drum, as the markings move relative to the sensor during rotation of the cable drum, for delivering an output signal. The groove defines a helical ridge in parallel relationship to the groove, wherein the markings are provided along the ridge, and wherein the sensor is secured to the housing in confronting relationship to the ridge.

Apparatus for ascertaining a cable motion for a hoist, in particular a pneumatically operated cable balancing hoist

A balancing hoist, includes a housing having a chamber accessible from outside. Received in the housing is a piston which is movable by gas pressure in a longitudinal direction and rotates a threaded spindle which projects into the chamber of the housing and carries a nut that securely fixed to the housing. Mounted in fixed rotative engagement to the spindle and movable longitudinally along the spindle is a cable drum on which a load-carrying cable is wound. At least one pawl is provided and configured for rotation in opposition to an elastic restraining force from a radially inward idle position to a radially outward brake position as a result of centrifugal forces, when a rotation speed of the cable drum exceeds a predetermined level, thereby impacting upon a fixed stopper which projects radially inwardly from the housing and slowing down the rotation of the cable drum until it is at rest.

Growing community of inventors

Wetter, Germany

Klaus-Jürgen Winter

Growing community of inventors

Wetter, Germany

Klaus-J&uuml;rgen Winter

Klaus-Jürgen Winter