FOLDABLE FRAME FOR TWO-WHEEL VEHICLE

摘要

A foldable frame for bicycle is disclosed in the present invention. The foldable frame can be folded up in three simple steps because of the application of two releasable locking systems: (1) release a front locking system; (2) release a rear locking system; (3) fold up a pair of rear forks hinge joint with a crossbar towards the front wheel. Other parts such as seat tube and pedal bar which are hinge joint with the crossbar can be folded up towards the crossbar. To reduce weight of the frame, a single-tube suspension system is also employed at the front of the foldable frame. The foldable frame of the present invention is easy to fold, non-bulky, lightweight and affordable to strong force as compared to any conventional foldable bicycles. The present invention can be applied to bicycle or any two-wheel vehicles such as electricity-driven or petroleum-driven motorcycle.

主权项

1. A light-weight foldable frame for bicycle, said foldable frame comprising a crossbar (101), a head tube (102), a seat tube (103), a pair of rear forks (104), handle bars (111), and a pair of front and rear locking systems (109, 105); front end of said crossbar (101) being configured to be fixedly connected with said head tube (102) and releasably connected with said handle bars (111) by said front locking system (109); rear end of said crossbar (101) being configured to be releasably connected with said rear forks (104) by said rear locking system (105); the rear end of said crossbar (101) being independently connected with said seat tube (103) and said rear forks (104) by two separate hinge joints (202, 201); said rear forks (104) being pivotally movable about the hinge joint (201) with said crossbar (101) when said rear locking system (105) is released; said handle bars (111) being configured to be detachable from said crossbar (101) when said front locking system (109) is released; the foldable frame being transformed from an unfolded state to a folded state when said front locking system and rear locking system are both released.