Zahnradfabrik Friedrichshafen, Ag.

Zf Friedrichshafen Ag

Egon Mann

Helmut Eymuller

Wolfgang Gebhard

Friedrich J Ehrlinger

Manfred Fischer

Eduard Heilig

Erwin Meisinger

Rudolf Jocham

Michael Meyerle

Unal Gazyakan

J&uuml;rgen Legner

August Winter

Siegfried St&uuml;tzle

Hans-Peter Bach

A traveling mechanism having a driving motor (,) which drives a feed pump (,) and a hydrostatic variable displacement pump (,), a zero fluctuating hydrostatic variable displacement motor (,) which forms with the hydrostatic variable displacement pump (,) a hydrostatic circuit and a hydrostatically driven 2-speed gear mechanism (,) which is engaged when the torque to be transmitted is minimal and the hydrostatic variable displacement motor (,) is at zero displacement capacity.

Hydromechanical traveling mechanism

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

Powershift reversing transmission

Failsafe brake system for a motor vehicle, in particular for a

Wheel drive for tracked vehicles

Drive for lifting equipment

Hydrostatic-mechanical gear for driving a mixing drum

Drive device with gearbox

Hydrostatic drive system for vehicles

Driving mechanism with two speed clutch

A hydrostatic/mechanical transmission system for motor vehicles having an engine coupled with a multi-speed mechanical transmission and a hydrostatic transmission including an accessory drive connectable to activate a variable displacement hydropump that is hydraulically connected with hydromotor; wherein, in one mode of operation, the hydrostatic transmission is operated, with the mechanical transmission in neutral, and the hydromotor drives the vehicle by way of a stepdown gear, wherein the stepdown gear drive is a multistep power transmission and wherein when in the one mode, the hydromotor drives a secondary gear shaft of the multi-speed transmission, the connection of this one mode being possible only in the neutral position of the multi-speed transmission.

Hydrostatic/mechanical transmission system

Hydrostatic drive specially for mixing drums of ready-mixed concrete

Growing community of inventors

Friedrichshafen, Germany

Egon Mann