ACCELERATING DEVICE FOR A BICYCLE WHICH CAN ENHANCE THE TRAVELLING SPEED

摘要

Disclosed is an accelerating device for a bicycle capable of increasing the rotating force of a driving wheel of the bicycle by enhancing the supporting force of gearshift, increasing coupling between the components, and minimizing energy loss due to friction between components by having an accelerating device formed in a sprocket of a bicycle, cogs of a gearshift assembly integrally mounted in a gearshift body, and a bearing installed between a ring gear and the gearshift body. The ring gear of the accelerating device is formed in multiple stages to correspond to the shape of the gear shift body. A plurality of latch protrusions are formed on a radial inner surface of a gearshift cover and are connected to be directed in one direction in a cogwheel manner. A first gear tooth is formed on one inner circumferential surface of the ring gear. A plurality of planet gears are disposed on the first gear tooth to be engaged and to be rotated along an inner circumference of the ring gear. A sun gear is disposed in the center of the planet gears to be engaged. A plurality of latch insertion grooves are formed on an outer circumferential surface of a gear carrier disposed and accommodated in the gearshift cover. A latch and a latch spring are disposed in the latch insertion groove. The latch is disposed to be selectively caught by the latch protrusions of the gearshift cover. The chain gears are disposed on an outer circumferential surface of the gearshift body to be integrated with the gearshift body. A third bearing is mounted on an outer circumferential surface of the ring gear accommodated and coupled to the gear shift body to be rolled.