扇形齿轮

A sector gear is a specialized gear component consisting of only a segment of a full gear wheel, designed to mesh with a pinion or other gears within limited angular motion. In recirculating ball nut assemblies, it functions as part of the motion conversion mechanism, typically engaging with a worm gear or lead screw to translate rotational input into controlled linear output with high precision and minimal backlash. This component is critical in applications requiring accurate positioning and smooth motion transfer.

The sector gear operates on the fundamental principle of gear meshing, where its teeth engage with a mating gear (usually a pinion or worm) to transfer torque and motion. In recirculating ball nut systems, it converts the rotary motion of the input shaft into linear displacement of the nut along the screw axis. The partial arc design allows for controlled angular movement within specific limits, making it ideal for applications with restricted rotation ranges. The recirculating balls reduce friction and wear, enhancing efficiency and precision.