| 摘要 |
Lifting mechanism for vertically displacing a platform (8) in relation to a chassis (7) and comprising a drive unit, at least one pair of arms (B, A) which are pivotally connected like scissors in a point (9) dividing said arms (B, A) into upper and lower parts in a scissors-like manner, whereby the first ends (1, 2) of the arms of the pair of arms (B, A) are hinged to the chassis (7) and the platform (8), respectively, whereas the opposite end (5) of the one arm (B) is guided along a track (5) on the chassis (7) and the opposite end (4) of the other arm (A) supports the platform (8), and a first and second rod (C, D), which at their individual one end are pivotally connected to each other in a joint (11) having an associated rolling or sliding member (12), and at their individual other ends (10, 13) are pivotally connected to the lower parts of the first and the second arms, respectively. At the chassis (7) a pivotal member (20) is mounted, which is movable by means of the drive unit and displaceably connected to the rolling or sliding member (12) in such a way that the pivotal movement of the pivotal member (20) displaces the platform (8) vertically via the rods (C, D) and the scissor arms (A, B).
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