Hiwin Technologies Corporation

Jouns Liu

Wen-Chia Wu

Jui-Long Hsu

A roller screw includes a long shaft, a screw nut sleeved onto the long shaft, and rollers, a turnaround member and a turnover member set in between the long shaft and the screw nut. The turnaround member enables the rollers to circulate. The turnover member defines a turnover passage extending over the peripheral surface of the long shaft and connected between two load paths in the long shaft and the screw nut to constitute a circulation path. The direction of arrangement of the rollers before entering the turnover passage is different from that after moving out of the turnover passage so that the amount ratio of the rollers that are arranged in two different directions is kept constant for industrial application.

Roller screw

An external circulation type ball screw with a noise-reduction structure is provided with a noise-reduction cover to be mounted on the nut. The noise-reduction cover is defined with a noise-reduction groove with two ends to cover impacting portions of the return path of the return member where the rolling elements impact the return path. With the design of the noise-reduction groove, noises will counteract each other after being transmitted to the noise-reduction groove, thus reducing the noises produced by the rolling elements impacting the return member and accordingly reducing the noises produced during operation of the ball screw.

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Taichung, Taiwan

Jouns Liu