Zf Friedrichshafen Ag

Wolfgang Gebhard

Egon Mann

Eduard Heilig

Nikolaus Scholz

In a wheel drive with a radial-piston motor (,) and a planet gear (,) a wheel hub (,) being placed on a wheel hub support (,) by means of wheel bearings (,). The wheel hub support (,) can be joined to a transmission connector (,) in a single piece and is fastened to a vehicle chassis support. A dog tooth brake (,) is located on the side of the wheel drive facing the vehicle and serves as parking brake. In a cover (,) for a hydraulic connection of the radial-piston motor (,) are integrated valves for control of the radial-piston motor (,) and of the brake (,). Short lines and delay times occur as result. The cover (,) contains inter alia a brake valve (,) for a hydraulic brake function and a displacement change-over valve (,) enabling certain cylinders (,) of the radial-piston motor (,) to be switched on or off.

Hydrostatic mechanical wheel drive

Hydrostatic-mechanical drive for a mixing drum

The method for preventing the interruption of tension during connection and disconnection of a first hydraulic motor to and from the power train of vehicles, in particular loaders, consists in that during the disconnection of the first hydraulic motor the high-pressure line is connected with the low-pressure line thereof, a flow distributor is readjusted so that the amount of oil fed to the first hydraulic motor is not increased, the pressure on a second hydraulic motor not to be disconnected being raised to a new value which remains constant during the disconnection, of the first hydraulic motor, a pump is readjusted to the new required (reduced) flow rate; and after adjustment of the pump to the new flow rate, the connection of the high-pressure line with the low-pressure line of the first hydraulic motor is eliminated; and during the connection of the hydraulic motor said method steps are carried out in reverse sequence.

Method and device for preventing an interruption of tension during

Hydraulic changing device for a multi-ratio vehicle transmission

Driving device

Hydrostatic-mechanical gear for driving a mixing drum

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Friedrichshafen, Germany

Wolfgang Gebhard