Tricycle having tiltable handlebar
View Patent ↗In the conventional tricycle, between the front frame and the bottom bracket which carries the pedal assembly, a joint is inserted that the front frame and the handlebar may tilt to the left or right. By holding the handlebar, the rider can tilt his upper body to cancel out the centrifugal force that occurs during turning and pushes him to the opposite direction of the handlebar causing a fall down accident. Between the front frame and the seat tube is installed a tiltable angle of the handlebar variable system that is remotely operated from the handlebar so that the rider can vary the tiltable angle of the handlebar for safe ride at low speeds or high speeds.
1 . A tricycle comprising
a front wheel, a front frame, a seat tube, a rear frame, two rear wheels, a seat attached to the seat tube at un upper end position thereof, a bottom bracket attached to the seat tube at a lower end position thereof, a pedal assembly rotatably attached to the bottom bracket, a cranking sprocket wheel attached to the pedal assembly, the two rear wheels being attached to a transverse axle at each end thereof, a rear sprocket wheel attached to the transverse axle, the transverse axle being rotatably attached to the
rear frame, the rear frame being attached to the bottom bracket, an endless chain belt linking the
cranking sprocket wheel and the rear sprocket wheel,
the front frame being attached to a head tube, a front fork rotatably attached to the head tube for rotation therein, the front wheel being attached to the front fork, a handlebar attached to the front fork at an upper end thereof for a rider to steer the front wheel thereby,
the rear end of the front frame being attached to a front connecting frame, the bottom bracket being attached to a rear connecting frame, the front connecting frame being rotatably attached to the rear connecting frame to rotate around a longitudinal axis of the rear connecting frame,
whereby the tricycle is configured such that the rider can tilt the handlebar to the left or right to shift his upper body to cancel out the centrifugal force that occurs during turning and pushes him to opposite direction of the handlebar causing a fall down accident, and the tricycle further comprising a tiltable angle of the handlebar variable system,
the system comprising a triangular frame attached to an upstanding extension frame of the seat tube, a longitudinal bar frame swingably attached to the front frame, the longitudinal bar frame being swinging up and down in the triangular frame, a hand lever attached to the handlebar to make the longitudinal bar frame to swing, a driveline linking the hand lever and the longitudinal bar frame,
whereby the tricycle is configured such that the rider can operate the hand lever to swing the longitudinal bar frame up or down and vary the tiltable angle of the handlebar as needed for safety depending on riding speeds.
2 . The tricycle of claim 1 , wherein the hand lever has a structure of a brake lever or a derailleur twist shifter lever of a bicycle.