Abstract:
A drive circuit for a DC drive motor (1) of an actuator in a vehicle, in particular an actuator of a steering lock in which a gear component driven by the motor can move toward a mechanical end stop, comprising four circuit components (6-9) controlled by a control circuit (14), wherein a first circuit component (6) couples a first connection (4) of the motor to a supply voltage (2), a second circuit component (7) couples the first connection (4) to ground (3), a third circuit component (8) couples a second connection (5) of the motor to the supply voltage and a fourth circuit component (9) couples the second connection (5) to ground (3). The circuit components each comprise a control connection and are switched off when the drive fails. The control circuit (14) applies a control voltage to the control connections (10, 13) of the first and fourth circuit components (6, 9) in order to drive the motor in one direction and applies a control voltage to control the connections (11, 12) of the second and third circuit components (7, 8) in order to drive the motor in the opposite direction. A motor braking circuit is provided for temporarily supplying the control connections (11, 13) of the second and fourth circuit component (7, 9) with a control voltage for turning on the circuit components as soon as the supply voltage (2) drops off, wherein the control voltage is provided from an energy storage medium (16) that is charged while the supply voltage (2) is applied.
Abstract:
The invention relates to a locking device (1) for a steering spindle, which comprises a locking bolt arrangement (11), a control element (17) and a sensor arrangement (24 - 28). The control element (17) is coupled to the locking bolt arrangement (11) via guiding devices (19), such that said locking bolt arrangement (11) can be displaced by rotating the control element (17) between a locking position and a release position. Said locking bolt arrangement blocks a rotation of the steering spindle in the locking position. The sensor arrangement is used to detect the release position of the locking bolt arrangement and at least one predetermined rotational position of the control element and comprises a first permanent magnet (24) whereon the locking bolt arrangement (11) is secured and is arranged in a first coupling position in relation to a first hall sensor (25) when the release position is reached, and a second permanent magnet (26) which is coupled to the control element (17) in such a manner that it adapts to a second coupling position in relation to a second hall-sensor (27) when a predetermined rotational position of the control element (17) is reached.
Abstract:
The invention relates to a locking device (1) for a steering spindle, which comprises a locking bolt arrangement (11), a control element (17) and a sensor arrangement (24 - 28). The control element (17) is coupled to the locking bolt arrangement (11) via guiding devices (19), such that said locking bolt arrangement (11) can be displaced by rotating the control element (17) between a locking position and a release position. Said locking bolt arrangement blocks a rotation of the steering spindle in the locking position. The sensor arrangement is used to detect the release position of the locking bolt arrangement and at least one predetermined rotational position of the control element and comprises a first permanent magnet (24) whereon the locking bolt arrangement (11) is secured and is arranged in a first coupling position in relation to a first hall sensor (25) when the release position is reached, and a second permanent magnet (26) which is coupled to the control element (17) in such a manner that it adapts to a second coupling position in relation to a second hall-sensor (27) when a predetermined rotational position of the control element (17) is reached.