Thyssenkrupp Presta Ag

Thyssenkrupp Presta Steertec Gmbh

Alexander Kiforiuk

Frank Birkwald

Dennis Kontner

Ralf Eckstein

Philippe Steck

Peter Kenez

Roman Bilmayer

Krisztian Rath

Manfred Rombold

Jules Ngamga Nzepa

Michael Stange

The invention relates to a servo-assisted steering system, in particular for a motor vehicle, having a servo motor which drives an axially displaceable component via a nut () which is mounted in a frame () in a rotatable manner in a bearing (), wherein the nut () engages with a threaded spindle () formed on the component and is supported via the bearing () elastically with respect to the frame () in the axial direction by means of spring elements () and is supported on the frame () in the radial direction along a narrow encircling contact surface (), wherein the spring elements () are corrugated springs.

Electromechanical motor vehicle steering system

Ball screw comprising a ball nut (), which is rotatably mounted on a threaded shaft and on the inner circumference of which at least one ball thread () wound around an axis () in a coil shape is provided for balls () to roll on, wherein at least one recirculating element (), which is arranged on the outer circumference of the ball nut () and which is provided with a recirculating channel for the balls (), connects a start of a coil to an end of a coil of the ball thread by means of the two ends of the recirculating element in order to enable endless recirculation of the balls (), wherein the ball nut () is provided with a flange () for fastening a belt pulley () and with a bearing seat (), and a sleeve () pushed onto the ball nut is provided with a perfectly cylindrical outer circumferential surface, which outer circumferential surface secures the recirculating element () on the ball nut () and surrounds the ball nut () in a tubular shape between the flange () and the bearing seat ().

Ball screw

An electromechanical power steering system with a ball screw drive may include a hollow shaft motor with a stator secured to the housing and a rotatably mounted rotor arranged coaxially with a longitudinal axis of, and which may be drivingly connected to, a hollow shaft. The system may further include a ball screw nut arranged coaxially with the longitudinal axis, and which may drive a ball screw spindle via balls. The rotor may drive the ball screw nut via a reduction gear.

Electromechanical power steering system with a ball screw drive

A toothed rack or threaded rod, in particular for a steering mechanism for a motor vehicle, includes a first rod-shaped part which, as a function element of the toothed rack or threaded rod, includes at least one element for the conversion of a rotational movement into a translational movement, in particular a toothing and/or a threading for the engagement of a threaded nut or of a threaded drive, and a second rod-shaped part which is connected with the first rod-shaped part. The connection of the first with the second rod-shaped part takes place via a separate connection part which includes first and second connection pins, of which the first connection pin is held by press fit in the hollow volume opening out at the connection end of the first rod-shaped part and the second connection pin is held by press fit in the hollow volume opening out at the connection end of the second rod-shaped part. A section of the connection part located between the first and the second connection pin has at least over a region of its circumference a greater radial dimension than the first and the second rod-shaped part in the corresponding circumferential region.

Toothed rack or threaded rod

Growing community of inventors

Ebersbach an der Fils, Germany

Alexander Kiforiuk