微小ストロークを行う直動ガイドの給脂方法の開発

抄録

Normally, lubrication in linear motion guides is performed by spreading the lubricant over the entire load area by means of rolling elements supplied with lubricant during long strokes. However, during small strokes, the rolling elements cannot pass through the end plates at both ends of the carriage, so the lubricant cannot be supplied to the entire load area, which leads to wear and fatigue of the rolling elements. Therefore, the gap between the carriage and the rails can be utilized. By enlarging the gap by machining and adding porous material, we thought we could supply lubricant to the entire load area even during small strokes. For the experiment, the carriage was cut in half and a porous material was installed. As a result, it was found that the larger the rotation angle, the better the diffusivity, and the larger the number of rolling elements to be fed, the easier it was to supply grease to the entire load area.