A novel device consists of a driving wheel, an idler wheel which is fixedly connected with a bracket, a composite crank sliding block mechanism and relevant small cylindrical rolling elements (hereinafter referred to as rolling elements) with identical structure and equal diameter. the rolling elements fixedly connected with the driving wheel contact or separate from the rolling elements controlled by the composite crank sliding block mechanism, and the rolling elements controlled by the crank sliding block mechanism move along two slideways of different radii inside the idler wheel, and contact or separate from the rolling elements fixedly connected with a driven wheel, so that the driven wheel generates corresponding rotation or cease; a mechanism consists of two sliding blocks, two connecting rods, two round guide rods and two springs; although the two sliding blocks move along different paths respectively, the paths are determined by the same cambered track; the mechanism does nothave a crank, but has characteristics identical to those of the crank sliding block mechanism, therefore, the mechanism can be taken as a composite crank sliding block mechanism; moreover, one of thesliding blocks is fixedly connected with a pony wheel; when the pony wheel is meshed with a cambered gap on the driven wheel (the radii of both are equal), the driven wheel is accurately positioned; and the position and number of the cambered gap on the driven wheel are determined by the ratio between rotation time and cease time and cease points.