| 摘要 |
PROBLEM TO BE SOLVED: To decrease a supply fluid pressure by enlarging a sectional area of a fluid pressure cylinder for driving a trunnion supporting a power roller capable of tilt rolling. SOLUTION: A fluid pressure cylinder 77 is connected under trunnions 46FL to 46RR, a lubricating fluid is supplied to groove parts 71FL to 71RR as a lubricating fluid supply location formed in a lower end part of the fluid pressure cylinder 77, in the case that the lubricating fluid, passing through a fluid passage inside the trunnions 46FL to 46FR from these groove parts, lubricates bearings supporting a power roller, the lubricating fluid is directly supplied by pipes 48FL to 48RR from a common lubricating fluid passage 72 relating to the groove parts 71FL to 71RR, no surplus lubricating fluid passage is formed in a cylinder body 60, so as to enlarge a sectional area of each fluid pressure cylinder 77, in this way, a supply fluid pressure can be decreased. By adjustment or the like of an internal diameter of each pipe, a supply flow amount of the lubricating fluid to each power roller is uniformly generated.
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