| 摘要 |
A mechanism is provided for converting one rotary motion into at least one concentric and periodically-varying or intermittent rotary motion, and the mechanism comprises four links pivotably interconnected to form a quadrilateral linkage which can rotate about an axis passing through one of the links or a junction of two links of the linkage. A cam surrounds the axis and guides a point on one of the remaining links so as to guide and vary the shape of the linkage in its rotation about the axis, such guided linkage in rotation has relatively different and varying angular velocities about the axis at different points on the linkage. Such points provide periodic and relatively varying angular velocities to an output mechanism guided at such points. Variation of the angular velocities is controlled by the proportions of the lingage and the configuration and position of the cam.
|
