公开(公告)号：US5373752A

公开(公告)日：1994-12-20

申请号：US98498

申请日：1993-07-28

申请人： Ulrich Schlagwein

发明人： Ulrich Schlagwein

IPC分类号： E05B81/24 ,  E05B81/40 ,  E05B81/46 ,  E05F15/10 ,  F16H25/20 ,  F16H25/18 ,  E05B47/00 ,  F16H3/40

CPC分类号： E05B81/25 ,  E05B81/40 ,  F16H25/20 ,  E05B81/46 ,  F16H2025/2068 ,  F16H2025/2081 ,  Y10S292/43 ,  Y10T292/1082 ,  Y10T74/18696 ,  Y10T74/19367 ,  Y10T74/19605

摘要： A motor-vehicle power actuator has a housing, an electric motor in the housing having an output shaft, an input gear fixed on the shaft, a threaded spindle extending along and rotatable about a spindle axis in the housing, an output gear fixed on the spindle adjacent and out of contact with the input gear, and a nut threaded on the spindle and nonrotatable relative thereto. Thus rotation of the spindle in one rotational sense displaces the nut axially relative to the spindle axis in a release direction. A rocker pivotal in the housing on the shaft axis carries an intermediate gear meshing with the input gear, and also meshable with the output gear. The rocker is pivotal between an end position in which the intermediate gear meshes with the output gear and through an intermediate position in which the intermediate gear does not mesh with the output gear. The rocker and intermediate gear are so positioned that, on normal forward rotation of the motor shaft, the rocker moves into its end position. A biasing unit urges the rocker into the intermediate position except when the motor is energized and is rotatably driving its shaft and a spring unit engaged between the housing and the nut axially biases the nut in one of the directions so that when the motor is not actuated the biasing unit disconnects the input and intermediate gears from the output gear and the spring unit urges the nut in the one direction.

摘要翻译： 机动车动力执行器具有壳体，壳体中的电动机具有输出轴，固定在轴上的输入齿轮，沿壳体中的主轴轴线延伸并且可围绕壳体中的主轴轴线旋转的螺纹主轴，固定在壳体上的输出齿轮 主轴相邻并与输入齿轮不接触，以及螺纹连接在主轴上并且相对于其不可旋转的螺母。 因此，主轴在一个旋转方向上的旋转使螺母在释放方向上相对于主轴轴向轴向移位。 在轴轴上的壳体中枢转的摇臂具有与输入齿轮啮合的中间齿轮，并且还可与输出齿轮啮合。 摇杆在中间齿轮与输出齿轮啮合的终端位置和中间齿轮不与输出齿轮啮合的中间位置之间枢转。 摇臂和中间齿轮的位置如此，使得在电动机轴的正常正向旋转时，摇臂移动到其最终位置。 偏置单元促使摇臂进入中间位置，除了当电动机通电并且可旋转地驱动其轴并且接合在壳体和螺母之间的弹簧单元在一个方向上轴向地偏置螺母时，使得当电动机未被致动时 偏压单元将输入和中间齿轮与输出齿轮断开，弹簧单元沿一个方向推动螺母。