Electric drive with brakes, in particular for hoists, lifting devices or positioning transporting systems

US5631510A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Heinz Flaig · Bochum, DE
• Josef Saeftel · Castrop-Rauxel, DE
• Harald Bitsch · Witten, DE
• Herbert Dreher · Horb, DE
• Axel Hauschild · Unna, DE
• Johannes Kluge · Wetter, DE
• Anton Munzebrock · Dortmund, DE
• Dirk Schulte · Bry-sur-Marne, FR
• Roland Staggl · Wetter, DE
• Karl Zacharias · Schwerte, DE

Key dates

• Filing date: Nov 7, 1994
• Grant date: May 20, 1997
• Expiry date: Nov 7, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2121/22
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electric drive with brakes, in particular for hoists, lifting devices or positioning transporting systems, having a brake disk which is movable axially on a motor shaft so as to rotate therewith via a toothing. The brake disk has brake faces at both sides and can be pressed against a stationary counter-brake disk by a spring force. An electromagnetic device is provided which, when connected to current, causes the brake to be released against the spring force. The electromagnetic device has a.c. magnets and E-shaped magnet coil yokes. The counter-pole faces associated with the coil yokes are arranged at magnet yokes which can move angularly on all sides so that the counter-pole faces can be aligned at the end faces of the E-shaped magnet coil yokes located opposite thereto when current is applied to the a.c. magnet.