| 摘要 |
A speed reducer device having a rotatably driven input shaft, a plurality of elongated planetary rollers disposed around the axis of the rotatably driven input shaft, a plurality of cylindrical output connection rings coaxial with the input shaft and within which the planetary rollers are positioned, and means to press the rotatably driven input shaft, the planetary rollers, and the cylindrical output connection rings together so that when the input shaft is rotated, the planetary rollers and the connection rings rotate without slipping. Each planetary roller is formed from first and second coaxial integral rollers which revolve and rotate within the space defined by the rotatably driven input shaft and the cylindrical output connection rings. The output connection rings comprise first and second output connection rings, wherein the first and second rollers rotate and revolve within the first and second output connection rings, respectively. The pressing means is adjustable to press either the first output connection ring, the first roller, and the input shaft together or the second connection ring and the second roller together, whereby the rotation of the input shaft causes the planetary rollers and either the first or second connection rings respectively to rotate.
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