Mannesmann Aktiengesellschaft

Brueninghaus Hydraulik Gmbh

Lohmann & Stolterfoht Gmbh

Hartwig Pfordt

Josef Beck

Gerhard Beutler

Horst Damm

Karl-Heinz Jakubowski

A drive system includes two reversible hydraulic motors connected in parallel to a variable displacement pump and controlled by respective 4-port, 2-position valves. The motors, at least one of which is a variable flow, variable speed motor, are coupled to a single output shaft via an intermediate gear section. The hydraulic motors are positioned on one side of the intermediate gear section and their respective drive shafts are arranged parallel relative to one another. A clutch, which is concentrically disposed within an axial bore of a gear member, is operable to couple the drive shaft of a first of the motors to the output shaft. A second gear member, which is driven by the output shaft of a second of the motors, is adapted to mesh with the first gear member. If both motors are of variable speed construction, it is possible to operate the drive in three speed ranges, i.e. by operation of the first hydraulic motor only, by operation of the second hydraulic motor only, or by simultaneous operation of both hydraulic motors.

Dual hydraulic motor drive system

Hydrostatic axial piston motor for fitting in the hub of a driven wheel

A mounting sleeve extends from a vehicle body or other housing and contains on its body/housing side a planetary gearing whereby, in particular, the sleeve is provided with an internal ring gear for planetary gearing; the sun gear is carried by an input shaft, and the planet gear carrier is integral with a shaft which is keyed to a hub; the hub is journaled by two roller bearings in the mounting sleeve both being on the same side, as far as the planetary gearing is concerned. The roller bearing elements are of a frustoconical configuration, and their axes are particularly oriented to prevent the reaction of radial and axial forces into the gearing.

Connecting a hub to the drive of a traction chain vehicle, or the like

Growing community of inventors

Witten, Germany

Hartwig Pfordt