| 摘要 |
A speed reducer is disclosed for providing large reductions in shaft speed in an efficient manner. The speed reducer is adapted to be mounted on the end of a source of input power, such as a motor or other prime mover, and comprises a gearing arrangement in a housing. A rotatable input shaft extends into the housing at one end from the motor, and a coaxial rotatable output shaft extends from the speed reducer from the other end of the housing. The gearing arrangement includes a driven internal gear operatively connected to rotate the output shaft, a driving spur gear which engages the driven internal gear, means on the input shaft for eccentrically orbiting the internal gear, and means for maintaining the driving spur gear nonrotating with respect to the housing. A multiple gearing arrangement may be used to provide a greater speed reduction. In the multiple gearing arrangement, means for maintaining one of the gearing elements nonrotating with respect to the housing are mounted on both ends of the housing.
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