| 摘要 |
<p>Device for varying the length of pedal cranks (2,3), in particular for pedal vehicles, the crank arm of each pedal crank comprising a movable element (2), to which the pedal (1) is fastened, and a fixed element (3), rigidly connected to a body (5) which is revolving with respect to a fixed body (15,17), where a shaft (7) goes coaxially through said revolving body (5), and said movable element (2) is guided to slide with respect to the fixed element (3) by a kinematics (10,11), which connects said shaft (7) to said movable element (2). According to the invention, means operate between said revolving body (5), said shaft (7) and said fixed body (15,17) for maintaining said shaft (7) practically still or static with respect to said revolving body (5), in spite of its rotation. <IMAGE></p> |
