The invention discloses an improved bicycle frame structure, which improves riding quality and the internal congestion of a hub, simplifies the hub structure, and reduces the manufacturing difficulty of the hub. The adopted technical scheme is as follows: a rear fork foot and a front fork foot are arranged with internal bearing positions so that a rear wheel carrying bearing and a front wheel bearing are respectively and correspondingly assembled in the respective internal bearing positions, the front fork foot and the front wheel bearing are fixedly connected in a penetrating mode through a front wheel hub fixing pin, a front wheel hub is sleeved on the front wheel hub fixing pin, a corresponding bearing is not required to be arranged in the front wheel hub, the rear fork foot and the rear wheel carrying bearing are fixedly connected in a penetrating mode through a rear wheel hub fixing pin, a rear wheel hub is sleeved on the rear wheel hub fixing pin, a corresponding bearing is not required to be arranged in the rear wheel hub, two ends of a five-way transverse straight-through pipe are respectively arranged with outer bearing positions, crank bearings are sleeved on the outer bearing positions, a crank is sleeved on the outer side of the crank bearing, a main shaft of the crank is arranged to penetrate through the five-way transverse straight-through pipe, and the two cranks are fixedly connected.
IMPROVED BICYCLE FRAME STRUCTURE
VERBESSERTE FAHRRADRAHMENSTRUKTUR
STRUCTURE DE CADRE DE BICYCLETTE AMÉLIORÉE
2022-04-13
Patent
Electronic Resource
English