| 摘要 |
<p>The jack (10) is provided with a vertically displaceable threaded spindle (12) comprising a load carrier; the spindle has at its upper end an integral rotary wheel (21) which meshes with a drive gear (20) which is rotated about its axis by a crank (14) mechanically fixed thereto. Said crank (14) is rotatingly and integrally supported by a gear case (16). In order to improve said jack so that even a flat drive pinion (20) may be reliably secured to the end of the crank (22) without damaging the bearing bush or the case (16) by driving, during the mounting, the extremity of the crank (22) into the case, there is provided that said extremity may mesh with a slotted drive bushing (25) which is mounted and fixed together on the drive pinion (20).</p> |
