The invention relates to a bicycle, in particular to a bicycle adjustable in chain wheel tightness. An adjustable frame hanging lug is arranged on a rear axle fork frame of a bicycle body and comprises a rear fork hook with two ends connected with the rear axle fork frame and a rear axle hanging lug, two long oval holes arranged linearly are formed in the rear fork hook, a positioning bolt is arranged between the rear fork hook and the rear axle hanging lug, one end of the positioning bolt extends into the long oval holes of the rear fork hook and slide in the long oval holes, the other end of the positioning bolt is fixedly connected with the rear axle hanging lug, a jackscrew mechanism is fixed to the rear axle hanging lug, and the jackscrew front end of the jackscrew mechanism abuts against the rear fork hook. By means of the structure, the distance between the rear fork hook and the rear axle hanging lug can be conveniently changed by adjusting a jackscrew, a rear axle is installed on the rear axle hanging lug, and the rear fork hook is installed on the rear axle fork frame, so that the distance between a middle point of a five-way part and a middle point of the rear axle can be changed, and the chain wheel tightness can be conveniently adjusted.
Bicycle adjustable in chain wheel tightness
2015-04-01
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
Collapsible bicycle rack having adjustable front wheel holders
European Patent Office | 2016
|