| 摘要 |
PURPOSE: An apparatus for driving tumbler is provided to enable a user to freely move a tumbler by generating friction driving force. CONSTITUTION: A concave frame(110) is bent downward and connected to two wheels(112). A footboard(111) is welded to the upper part of the frame. Axle housings(114) are welded to both ends of the frame. The wheels and a driven drum(113) are integrally fixed to the axle housings by a wheel axle. Support units(115) are fixed to the upper part of the frame, and are coupled to a handle support bar(116). A hinge shaft(121) is coupled to the handle support bar, and has an idle double-chain gear(122). The handle support bar includes a fixed frame(118), a handle(117), and a hole through which the hinge shaft passes. A forward shaft and a backward shaft are rotatably fixed to the fixed frame. A forward driving drum is coupled to one end of the forward shaft. A forward gear and a chain gear are installed at the other end of the forward shaft.
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