| 摘要 |
<p>A motor vehicle lift comprising two parallel runways for supporting the vehicle wheels, each runway being provided with at least two devices for elevating them from the floor, characterised in that each device comprises: - a pair of equal-length first (6) and second (10) uprights hinged to each other, to the floor (runway) and to the runway (floor) respectively, in positions corresponding with two superposed vertical axes, - a pair of first (14) and second (16) arms hinged together at one end, the second arm (16) being hinged to the second upright (10) along a hinging axis (22) which is equidistant from the axis (12) on which the second upright (10) is hinged to the runway (2) (floor) and from the end (18) of the second arm (16), which is slidable along a guide (20) provided in the runway (2) (floor), the first arm (14) being also h inged to the first upright (6) in a position such that the d istance of the h ing ing axis of the second arm (16)/second upright (10) from the hinging axis of the first upright (6)/second upright (10) corresponds to the distance of the hinging axis of the first arm (14)/second arm (16) from the hinging axis of the first arm (14)/first upright (6), - an actuator device (24, 26) with its ends securable selectively to two of the elements of the quadrilateral formed from the first/second uprights and the first/second arms, - at least one of the parts of said quadrilateral being provided with elastic means (30) enabling it to vary the dimension between the two hinged ends.</p> |
