| 摘要 |
PURPOSE:To obtain a cross roller bearing of a long life by interposing a spacer between rollers, with the spacer formed with a spherical body and having concave arcuate guide surfaces for contacting and guiding the rollers. CONSTITUTION:A spacer 1 formed with a spherical body of a diameter slightly smaller than a roller diameter is provided, on its opposing locations, with arc- shaped guide surfaces 1a of a radius slightly greater than the roller radius with the axes of both guide surfaces being approximately normal to each other. A recess 1b to be an oil pocket is formed in the center of the guide surface 1a. Also a circular plane 1c is provided to be a visual reference at the time of assembling. Since the spherical spacer and cylindrical rollers move in a united condition within an orbit groove, sufficient amount of lubricant is secured in the orbit groove, gap in the circumferential direction is minimized, frictional resistance is reduced, and the manufacturing cost is reduced.
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