| 摘要 |
FIELD: transport engineering; bicycles. ^ SUBSTANCE: invention relates to bicycles with elastic rear suspension and two-step chain in rear wheel. Gear ratio changer and driven sprocket 5 of first step and driving sprocket 6 of second step combined axially with gear ratio changer are arranged on suspension lever 3 so that their axle 4 is located between axis of shaft of cranks with pedals and turning axle 13 of suspension lever 3, preferably in one plane, tilted to front wheel at angle of 60°-80° to road surface. Invention simplified combination of suspension and drive as it makes possible to avoid combination of axle of suspension turning lever and axle of intermediate link with first step driven sprocket and second step driving sprocket. ^ EFFECT: prevention of swinging of suspension at active pedalling. ^ 3 cl, 2 dwg |
