friction ratchet

This paper explains that, manually driven wheelchair changes into the one of big round rotation by shaking the handle linked with friction ratchet mechanism, and then makes an analysis of the friction ratchet mechanism.

本文将手动直接驱动轮椅改为通过摇动手柄使与摩擦式棘轮机构从动轮固联的轮椅大轮转动,进行了摩擦式棘轮机构的受力分析,说明了该机构较普通轮椅省力,工作平稳舒适,同时可以比较方便地驱动轮椅。