Huf Hülsbeck & Fürst Gmbh Co.kg

Hans-Joachim Limburg

Horst Zillmann

Andreas Van Den Boom

Ludwig Zauser

Mark Hirche

A locking device for a steering spindle, includes a locking bolt arrangement and a control element coupled thereto, such that the locking bolt arrangement can be displaced in the axial direction between a locking position and a release end position by rotating the control element. An electronic control unit controls a motor drive and a sensor arrangement, coupled to the control unit for detection of at least one axial position of the locking bolt arrangement. The control unit switches off the motor drive when the locking bolt arrangement is displaced in the axial direction from the locking position to the release end position. The sensor arrangement emits an output signal which displays when a switching off position of the locking bolt arrangement has been reached. The sensor arrangement is so constructed that the output signal can receive a plurality of monotone output signal values which are dependent on the axial position thereof, at least in one displacement interval of the locking bolt arrangement precedent to the release end position and comprising a desired switching position, thus enabling the desired switching position to be selected by selecting an associated output signal value. The control unit includes a selection device which enables one of the desired switching off positions, corresponding to the output signal value as a threshold value to be selected, such that a signal is emitted when the motor drive is switched off, when the threshold value is reached, exceeded or is fallen below.

Locking device for a steering shaft having a selectable switching position when the locking bolt arrangement is displaced in the direction of a release end position

A device for locking the steering shaft of a motor vehicle against rotation by means of a locking bolt cooperating with locking recesses of the steering shaft. A control member that can be rotated back and forth displaces the locking bolt back and forth radially relative to the axis of rotation of the control member between a locking position and a release position. The locking bolt has a laterally protruding pin that engages a spiral groove of the control member on the front face of the control member adjacent to the locking bolt and that winds about the axis of rotation of the control member. The locking bolt has a pin which is is spring-loaded and movable in the direction towards the control member. The control member can be rotated as far as into the position corresponding to the locking position of the locking bolt even if no locking recess of the steering shaft is located in front of the locking bolt to receive same.

Blocking device for motor vehicle steering shaft

A lock is fitted with a locking element and a control element which is rotated by a drive to-and-fro in order to axially reciprocate the locking element through a coaxial drive element between a locked and an unlocked position. The drive element and the control element are also configured coaxially and cooperative by means of a cross-pin which is axially displaceable in a transverse borehole of the inner drive element and by means of two helical inner channels as well as an adjoining plane terminal surface of the outer control element which runs perpendicular to the axis of rotation of the control element and is bounded by a side ramp running from the bottom of one channel past the other channel on the outside thereof toward the drive element. The drive element and control element cooperate in such manner that when the control element rotates in that direction in which the cross-pin runs in the channels toward the terminal surface, the drive element shall be commensurately axially displaced and remain in the axial position it has reached until the control element is rotated in the opposite direction and the cross-pin moves in the channels away from the terminal surface causing the drive element to move axially in the opposite direction.

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Schwabenhausen, Germany

Hans-Joachim Limburg