| 摘要 |
A variable sprocket IVT machine has a sprocket wheel, on an input shaft, including a plurality of wheel bodies which are independently rotatable on the shaft, a sprocket slidably located in and projecting radially from a sleeve in each wheel body, connecting arrangements, connecting the wheel bodies in the composite wheel, which are adapted to vary the angular disposition between and the degree of radial projection of adjacent sprockets relatively to each other to ensure clean engagement of the sprockets with uniformly spaced apertures in a drive chain which partially surrounds the wheel in a radially movable zone of sprocket engagement, elements for engaging the wheel bodies of the sprockets in the zone with the input shaft and a control arrangement which supports the sprockets not in the zone and which is movable to vary the ratio of rotation of the input shaft relatively to a chain driven output shaft.
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