| 摘要 |
PURPOSE: A 3-wheel motorcycle of a type of riding in a standing state is provided to enable high-speed turn by coping with centrifugal force and improving the grounding force of tires. CONSTITUTION: A 3-wheel motorcycle of a type of riding in a standing state comprises a handlebar structure, a footboard-tilting device, a rear wheel-tilting device, and a rear wheel power transmission structure. In the handlebar structure, a handlebar connection rod(23) is attached to the upper end of a front fork(30) connected to a head tube(21). Bolts(24), to which urethane rubbers are fastened, are fastened to the right and left ends of the handlebar connection rods in a shape capable of rotating right and left together with the intermediate parts of right and left handlebars(25,26). Bolts(22), to which urethane rubbers are fitted, are fastened to the bottom of the handlebars on the sides of the head tube. The handlebar connection bar and the front fork rotate and steer a front wheel by pushing and pulling the handlebars each in different directions. A main shaft(33) of the front wheel is fixed by a body and adaptor bearings(32) and the handlebars are simultaneously tilted to the right or left side. In the footboard-tilting device, the main shaft and a rear wheel-tilting shaft(12) rotate by the right and left tilting of the handlebars, and footboards(41) are tilted in the same direction as the direction of the front wheel by rotating a footboard-tilting placket attached to the rear wheel-tilting shaft and pushing and pulling a footboard-tilting rod(43). In the rear wheel-tilting device, right and left rear wheel-tilting chains are fastened to two rear wheel-tilting main pulleys attached to the rear of the rear wheel-tilting shaft and are fixed to the upper and lower sides of rear wheel-seating rods(52) via tension pulleys. In the rear wheel power transmission structure, an outer gear of a one-way power transmission gear is installed to a shaft of a rear wheel-rotating joint and is mounted to a rear wheel shaft-fixing bearing.
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