Hydraulic wheel drive

US4275616A · kind A · utility

Assignee

• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Friedrich Ehrlinger
• Egon Mann · Friedrichshafen, DE
• Manfred Fischer · Leichlingen, DE
• Rudolf Jocham · Tettnang, DE

Key dates

• Filing date: Oct 3, 1978
• Grant date: Jun 30, 1981
• Expiry date: Oct 3, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60K17/14
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A wheel drive comprises a hollow wheel support having a projection and in which is housed an axial-piston hydraulic motor having an output shaft connected via planetary gearing to the hub. To this end the projection is provided with mounting pins constituting the planet carrier of a first set of planet gears which mesh with a ring gear formed integrally inside the hub and with a sun gear that may be provided directly on the motor output shaft or that may be the output of a second set of planetary gears whose planet gears mesh with the ring gear of the hub and whose sun gear is connected to the motor output shaft. A clutch can be provided on this motor output shaft to disconnect it from the respective sun gear, and the inner end of the motor shaft may be acted on by a wheel brake.