DRIVE UNIT FOR A KINEMATIC SYSTEM IN A MOTOR VEHICLE
A drive unit for a kinematic system in a motor vehicle. In particular, the drive unit is provided for independently moving two movable elements, in particular blades for guiding an air current of an air vent. The movable elements are driven by way of an actuator plate, which includes a radial cam rotating and radially displacing a slide, which consecutively rotates two output elements. In a blocking position, the slide blocks the output elements to prevent a rotation.
1 . A drive unit for a kinematic system in a motor vehicle, comprising a cam control unit for moving a first movable output element and for, independently thereof, moving a second movable output element, the cam control unit comprising a radial cam and a sliding block, which, during a movement of the radial cam relative to the sliding block, moves along the radial cam and, in the process, is moved by the radial cam, and which, during the movement thereof, moves the first and second movable output elements, the radial cam having at least one ramification into at least two cam branches and a shifting gate, which, during a back and forth movement of the radial cam relative to the sliding block, moves the sliding block consecutively from a first cam branch to a last cam branch, the sliding block in the first cam branch, during the relative movement of the radial cam with respect to the sliding block, moving the first movable output element, and in a second cam branch of the radial cam, during the relative movement of the radial cam with respect to the sliding block, moving the second movable output element, and the radial cam comprising a return cam, which returns the sliding block to the first cam branch after exiting a last cam branch, wherein the drive unit comprises a non-movement block, which is actuated by the sliding block; the radial cam comprises a blocking section; and i the sliding block moves the non-movement block into a blocking position when the sliding block reaches the blocking section of the radial cam, the non-movement block in the blocking position blocking at least one output element to prevent a movement.
2 . The drive unit according to claim 1 , wherein the blocking section of the radial cam, after the last cam branch, branches off the shifting gate or off the return cam, and is reached by the sliding block from the shifting gate or from the return cam, after the last cam branch, when returning from the last cam branch to the first cam branch.
3 . The drive unit according to claim 1 , wherein the radial cam and the first output element and/or the second output elements can be rotated about an axis of rotation; and the first output element has inner teeth, which extend in a circular arc-shaped manner concentrically around the axis of rotation and in which the non-movement block, in the blocking position, engages so as to block the first output element to prevent a rotation about the axis of rotation, and/or in that the second output element has outer teeth concentric with respect to the axis of rotation, in which the non-movement block, in the blocking position, engages so as to block the second output element to prevent a rotation about the axis of rotation.
4 . The drive unit according to claim 3 , wherein the non-movement block comprises a slide, which is displaced by the sliding block into the blocking position when the sliding block reaches the blocking section of the radial cam; and the slide comprises an outer tooth which, in the blocking position, engages in the inner teeth of the first output element, blocking the same to prevent the rotation about the axis of rotation, and/or that the slide comprises an inner tooth which, in the blocking position, engages in the outer teeth of the second output element, blocking the same to prevent the rotation about the axis of rotation.
5 . The drive unit according to claim 4 , wherein the slide has a hole which surrounds the axis of rotation and in which the inner tooth is disposed.
6 . The drive unit according to claim 1 , wherein the blocking section of the radial cam is located outside an outline defined by the cam branches.
7 . The drive unit according to claim 6 , wherein the blocking section is located outside an outline of all other sections of the radial cam.
8 . The drive unit according to claim 1 , wherein the radial cam comprises a first counter cam branch which, during the relative movement of the radial cam with respect to the sliding block, moves the first movable output element in a direction opposite that of the first cam branch; and the radial cam comprises a second counter cam branch which, during the relative movement of the radial cam with respect to the sliding block, moves the second movable output element in a direction opposite that of the second cam branch.
9 . The drive unit according to claim 3 , wherein the cam branches extend in a curved manner on a limited circumferential section around the axis of rotation.
10 . The drive unit according to claim 1 , wherein the shifting gate connects the cam branches in a zigzag-shaped manner.
11 . The drive unit according to claim 1 , wherein the sliding block moves the output elements via a transfer element, which distributes the movement of the sliding block among the output elements.
12 . The drive unit according to claim 11 , wherein the transfer element comprises the non-movement block.
13 . The drive unit according to claim 1 , configured to pivot two air guide elements of an air vent.
14 . The drive unit according to claim 5 , wherein the hole is an elongated hole.