The invention discloses a pedal-free variable-speed structure of a bicycle, and belongs to the technical field of bicycle devices. The pedal-free variable-speed structure comprises a front chain wheel set and a rear axle hub, wherein the front chain wheel set is provided with at least one driving gear disk; a ratchet hole is formed concavely in the inner side of the front chain wheel set; a unidirectional ratchet is arranged in the ratchet hole, and fixed to an actuation mandrel extending on a five-way pipe through a sleeve; a pedal crank is arranged on the outer side of the front chain wheel set and fixedly connected with the actuation mandrel through screw locking; an axle rod is arranged in a central axle hole of the rear axle hub in a penetrating manner; a plurality of linkage fluted disks are arranged in sequence on one side of the rear axle hub, and the linkage fluted disks and the rear axle hub form a linkage state; a chain is arranged on the linkage fluted disks and the driving gear disks in a surrounding manner. The pedal-free variable-speed structure has the beneficial effects that when the riding section speeds need to be varied, the state of varying section speeds can be realized in a manner that the front chain wheel set and the rear axle hub rotate to perform actuation without pedaling the pedal crank forwards, use convenience is improved, the structure is simple, and the use is convenient.
Pedal-free variable-speed structure of bicycle
17.06.2015
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
Bicycle locking plate, bicycle pedal, bicycle pedal assembly and bicycle pedal system
Europäisches Patentamt | 2023
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