摘要 |
The chain drive described in the present disclosure, instead of using a sing le sprocket wheel, saves space by making use of two or more sprocket wheels coupled together by slip-free means, each sprocket wheel having only a small number of low sprockets. The number of sprocket wheels, the centre-to-centre distance between the sprocket wheels, the tip diameter of the sprocket wheel s, and the phase offset of the sprockets as between the sprocket wheels which form a set of such wheels are all so matched that one sprocket of one sprocket wheel always engages in the chain in rhythmical sequence, so that all the sprocket wheels rotate smoothly when the chain moves evenly. |