The invention relates to a bicycle frame, in particular to a bicycle frame stable in structure and small in a bicycle body. The bicycle frame comprises a front-fork socket, a saddle casing, a middle-axle casing and a rear-axle fork frame, the front-fork socket and the saddle casing are connected through a top bar, the middle-axle casing and the front-fork socket are connected through a bottom bar, the saddle casing and the middle-axle casing are connected through a vertical beam, and one end of the rear-axle fork frame is used for mounting of a rear axle while the other end is fixedly connected with the middle-axle casing. Strength of the bicycle body is effectively improved through a tri-prism tubular structure, a triangular prism close to top bar and bottom bar sides is of a tri-prism edge surface of the vertical beam, a triangular prism close to the rear-axle fork frame is a tri-prism edge of the vertical beam, a circular-arc concave surface is arranged on the middle lower side of the vertical beam, a wheel protrudes into the circular-arc concave surface, the length of the bicycle body is effectively shortened, and the bicycle body is lighter.
Bicycle frame stable in structure and small in bicycle body
2015-07-01
Patent
Electronic Resource
English
IPC: | B62K Fahrräder , CYCLES |