Device for controlling the displacement of an element, in particular of a seat or parts of a seat of a motor vehicle, in relation to a base

摘要

PCT No. PCT/FR86/00122 Sec. 371 Date Feb. 5, 1987 Sec. 102(e) Date Feb. 5, 1987 PCT Filed Apr. 14, 1986 PCT Pub. No. WO86/06036 PCT Pub. Date Oct. 23, 1986.The control device comprises a motor (5) having a shaft (7a) provided at one end with a worm (8a) to drive a nut-wheel (9a), the set of the worm (8a) and of the nut-wheel (9a) forming part of a reduction gear (R). A screw (12a) cooperates with the nut (11a). This screw (12a) is fixed in rotation around its axis. The reduction gear (R) comprises a stirrup (26a) comprising two intersecting cylindrical sleeves (30a, 31a) communicating through an opening (W). One (30a) of these sleeves receives the nut-wheel (9a). The worm (8a) is accommodated in a tube (10a), connected to the casing (6) of the motor (5), which comprises a window (32a) on its cylindrical wall at one end intended to be engaged in the other sleeve. For the assembly of the reduction gear, the above mentioned end of the tube (10a) is fitted in the other sleeve (31a) of the stirrup (26a) so that the above mentioned window should come to be opposite the above mentioned opening (W). The threads of the worm (8a) project through the said window (32a) to mesh with the nut-wheel (9a).