faltbarer or retractable schubantrieb with a parallelogrammvorrichtung which rotational deformation a straight line motion inside a shaft is generated.

摘要

The thruster is retractable or foldable and consists of a box (1) which is fixed in a sealing manner on the joint planes on a niche (2) which forms an integral part of the structure (3) of the craft. Inside this box (1), two asymmetrically pivoting arms (4) and (5), a motorised seating (10), a stirrup (17) and a helical assembly are folded up. The two arms (4) and (5) are on the one hand centred at (6) and (7) on the box (1) and on the other hand at (8) and (9) on the stirrup (17) which is integral with the thrust seating (10). Under manual or mechanical action (X) or (Y) exerted on the lever (12), which is integral with the arm (4), by the shaft (6), said arm (4), in combined rotation with the triangulation arm (5), causes the deformation of the trapezium, bringing about a rectilinear movement according to the axis (A-Z) of the seating (10) at its centre (11). IMAGE