| 摘要 |
A spring-tensioned gear mechanism for changing gears for a vehicle which is propelled by a force consists of at least one lever (1) which is at one of its ends rotary attached to the vehicle frame and at its other end rotary joined to the draw rod (2) which is rotary joined to a driving element (3). The driving element (3) is at its center axis rotary joined to a delimiter (4) which is rotary attached to an axis, passing the center of the driven small wheel (5), and the delimiter (4) is further rotary joined to a spring-tensioning device (10) which is rotary joined to the vehicle frame. Rotational movement of the driving element (3) is transmitted to the driven small wheel (5) by means of a movement transmitter (12) and further by means of a free wheel (7).
|
