Gear Ratchet and Pawl Working Principle

Ratchets are mechanisms that serve to limit either rotary or linear motion to only one direction.Ratchet designs vary but the basic composition of parts is fairly universal. A ratchet is composed of three main parts: a round gear (or a linear rack), a pawl (also called a "click"), and a base (or mount). Below is gear ratchet and pawl working principle.
Working principle
When the rocker of the driving member swings counterclockwise, the driving pawl is inserted into the slot of the ratchet wheel to push the ratchet wheel to rotate through an angle. At this time, the pawl slides on the tooth back of the ratchet wheel. When the active piece rocker swings clockwise, the stop pawl prevents the ratchet from rotating in the clockwise direction, while the drive pawl can slide over the back of the ratchet teeth, so that the ratchet does not move. In this way, when the rocker swings continuously and reciprocally, the ratchet performs one-way intermittent motion. Among them, the oscillating motion of the active member can be obtained by swinging the follower cam mechanism, crank rocker mechanism or by hydraulic transmission and electromagnetic devices.
If you are interested in precision casting gear ratchet or pawls, welcome to contact us. The geometry of the gear or rack is usually designed with a ramp feature on one side of the tooth leading to a sharp drop off which restricts motion of the pawl when the linear or rotational direction is reversed. Most ratchet mechanisms are not very large as only a small vertical wall is needed to prevent motion in one direction.