| 摘要 |
PURPOSE: A car-type four wheel bicycle is provided to miniaturize and lighten the bicycle by reducing the chassis of the bicycle. CONSTITUTION: A car-type four wheel bicycle comprises a main center tube(1), front wheel support tubes(2), post housings(7,7a), a center handle post housing, a handle post(15), a crank hub housing(9), a seat stay tube(6), and a rear wheel chain stay hub. The main center tube and the front wheel support tubes are connected to each other through bridges(3,3a). The post housings are installed in the end of the front wheel support tubes. The center handle post housing is formed in the front end of the main center tube. A handle bar is assembled in the top of the handle post. A down tube is formed from the top to bottom of the main center tube. The crank hub housing is installed in the end of the down tube. The seat stay tube is horizontally installed in the bottom end of the main center tube. |
