Jungheinrich Aktiengesellschaft

Christoph Weber

Frank Manken

Ernst-Peter Magens

Andreas Knie

Andreas Rogg

Frank Mänken

Frank Maenken

Bjorn Nommensen

Frank Herr Dr-Ing Mänken

Hartwig Grothkopp

Björn Nommensen

A rider lift truck with a drive portion, in which is arranged a travelling drive featuring at least one electric travelling motor for at least one steered driving wheel, with a steering device for the driving wheel, a load portion featuring a mast, an electric control unit for the travelling drive and operational controls for the travelling drive and the steering device and with a standing platform, wherein a horizontally arranged travelling motor is provided below the flatly built standing platform as a wheel hub drive for the driving wheel, and a steering motor is arranged below the standing platform alongside to the travelling motor, which is coupled with a fifth wheel for the driving wheel via a steering gear.

Rider lift truck

Industrial truck with a charger, an asynchronous machine and a three-phase AC control unit which converts a DC voltage of a battery for the asynchronous machine, the charger having a switching power supply which is connected to the three-phase AC control unit via a transformer, the switching power supply, the three-phase AC control unit and the transformer forming a resonant converter, which converts a mains voltage into a charging voltage for the battery.

Industrial truck with a charger

Steering drive for a wheel of a ground conveyor with an apparatus for recording the actual angle of the steered wheel, with a steering motor, a steering controller or regulator driven by a steering angle transmitter, the input signal of which is given to the steering motor, a steering drive coupled with the shaft of the steering motor, the output side of which is connected with a steering plate, which mounts the steered wheel, and a rotation angle sensor, which records the rotation angle of the steering plate, wherein the shaft of the steering motor is designed as a hollow shaft, through which a sensor drive shaft is inserted and which is connected on the drive side with the output side of the steering drive and works together with the angle sensor on the side of the steering motor facing away from the steering drive.

Steering drive for a wheel of a ground conveyor with an apparatus for recording the actual angle of the steered wheel

Rotation angle sensor, in particular for an electrical steering system of an industrial truck, in which two magnetic field sensitive sensor elements are arranged on orthogonal axes and a permanent magnet is attached to a shaft extending through the axis intersection point and the output signals X, Y of the sensor elements are given to an evaluation unit, which determines from the two output signals X, Y the rotation angle value by means of a function saved in the evaluation unit, characterized in that for a plurality of predetermined values of one of the output signals X or Y associated ideal values calculated from the geometrical relationship of the sensors of the other output signal Y, X are saved in the evaluation unit, the measured values of the other output signal Y, X are compared with the ideal values and a warning or stop signal is created if the difference between the measured and ideal value reaches a predetermined amount.

Rotation angle sensor, in particular for an electrical steering system of an industrial truck

Growing community of inventors

Henstedt-Ulzburg, Germany

Christoph Weber