| 摘要 |
The present invention relates to a folding bicycle, particularly a pedal-assist bicycle, comprising a frame with a down tube (4) with a back end with a seat tube (7) and a front end with a steering tube (10) susceptible to housing a stem (9) connected in the upper zone to a handlebar (101) and in the lower zone to a front fork (11), a back fork (2) coupled to the back end of the down tube (4) and a bottom bracket (236), a folding mechanism which allows folding the bicycle (1) about an articulating pin (12) to at least one folded position, and a locking mechanism for keeping the bicycle in said folded position, where the bottom bracket (236) is integrated in a lower portion (234) of a connecting part (23) emerging in the lower zone of a front portion (226) of the back fork (22); the connecting part (23) comprises an upper side (232) with a back portion attached in the lower zone to the front portion (226) of the back fork (22) and with at least one cantilevered axial extension (233) which extends below and is connected to the down tube (4) in the unfolded position of the bicycle (1); the axial extension (233) comprises at least one front end (221) articulated in the lower zone to the down tube (4) by means of a transverse shaft (12), such that the back fork (22) and the connecting part (23) form a pivoting block (2) susceptible to rotating jointly in a vertical plane towards the steering tube (10) to said folded position; the front portion (226) of the fork (22) is connected to the back end of the down tube (4) in the unfolded position of the bicycle (1). 31 41 231 236 1 |
