| 摘要 |
<p>The control device comprises a motor (5) having a shaft (7a) provided at one end with a worm screw (8a) to drive a wheel-nut (9a), the assembly formed by the worm screw (8a) and the wheel-nut (9a) pertaining to a reduction unit (R). A screw (12a) cooperates with the nut (11a). This screw (12a) is rotationally secured about its axis. The reduction unit (R) comprises a stirrup (26a) having two cylindrical secant sleeves (30a, 31a) communicating by an opening (W). One of said sleeves (30a) receives the wheel-nut (9a). The worm screw (8a) is housed in a tube (10a), connected to the crank case (6) of the motor (5), which comprises on its cylindrical wall, at one end intended to be engaged into the other sleeve, a window (32a). For mounting the reduction unit, said end of the tube (10a) is threaded into the other sleeve (32a) of the stirrup (26a) so that said window is facing said opening (W). The threads of the worm screw (8a) project through said window (32a) to mesh with the wheel-nut (9a).</p> |
