| 摘要 |
<p>A rotating crank of a bicycle comprises a left crank, a right crank, a pedal hole (1) and a core hole (2) of the center shaft in the crank, and a tooth disc (3) assembled in the core hole (2) of a center shaft of the right crank, a movable core (4) is set, and a core sleeve (6) is installed outside of the movable core (4), and the pedal hole (1) is set on one end of the movable core (4), and an inner locking groove (5) is set on the other end of the movable core (4), and a locking pin (9) is installed on one end of the inner locking groove (5), and a locking position (8) is set on the locking pin (9), and the core sleeve (6) has a locking groove (7) which can lock the locking position (8), and the core hole (2) of the center shaft is set outside of one end of the locking groove (7) of the core sleeve (6), and the lower end of the core hole (2) of the center shaft and the core sleeve (6) are integral, and a spring (11) is installed on the movable core (4) between the pedal hole (1) and the core sleeve (6). The rotating crank can make the pedal not only rotate forward and backward, but also axially rotate about the core, and the pedal can be folded in any direction in 360 degrees.</p> |
