Drive arrangement for transport vehicles

US4068542A · kind A · utility

Assignee

• Waggonfabrik Uerdingen AG · DE

Inventors

• Werner Brand · Berlin, DE
• Dieter Schillings
• Leo Geers
• Edmund Pietrowski

Key dates

• Filing date: Oct 12, 1976
• Grant date: Jan 17, 1978
• Expiry date: Oct 12, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2107
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A drive arrangement for transport vehicles is operative for moving a step plate between operative positions so that passenger access to the vehicle is facilitated. The drive arrangement includes a turnable shaft coupled to the step plate, and a motor coupled with the shaft for turning the latter about its axis and for moving the step plate between its operative positions. An uncoupling device disengages the motor from the shaft so that the step plate can be manually moved. The drive arrangement also comprises a switching arrangement having first cam parts spaced from and about the shaft, and second cam parts mounted on the shaft for joint rotation therewith. The second cam parts each have a predetermined angular position relative to the shaft and to the first cam parts for controlling the operation of the motor so that manual movement of the shaft upon uncoupling of the motor therewith forceably positions the second cam parts to retain their respective predetermined positions. Thereby, subsequent actuation of the motor is greatly facilitated.