| 摘要 |
1. Reduction gear with a drive shaft and a driven shaft (7; -; 35), wherein the drive shaft is a lead screw (9; 31; 32) on which is screwed a nut (13) secured against rotation, which is coupled to the driven shaft (7; 35), characterised in that the nut (13) is connected to a run, extending substantially parallel to the lead screw, of an endless, tensioned chain (16; 29; 30), e.g. a toothed chain, running over two sprocket wheels, e.g. toothed-chain wheels (14, 15; 25, 26; 27, 28), and in that one of the two sprocket wheels (14; 26; 28) is rotationally fast with the driven shaft and in that the nut (13) is preferably provided on a chain closer tensioning the chain. |
