I. Screw Mechanisms

When a mechanism includes at least one screw pair, this mechanism is called the screw mechanism. Structurally, the commonly used screw mechanisms can be classified into two types: one is that comprises of the screw and frame only and the other one is that consists of the screw, frame, and the nut slider, a component sliding on the screw. The prior type is usually applied in the situation that requires an extremely large output force based on a small input torque, e.g., the jacks. The posterior type is often appeared in the application that requires a precise transmission for converting motion between a rotation and a translation, e.g., the ball screw.

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