| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling spherical bearing simplifying a bearing periphery by connecting various cords for supply and control of fluid through the inside of a bearing for a working means furnished on an oscillating member to be three-dimensionally guided. SOLUTION: An inner ring 2 of the rolling spherical bearing 1 is constituted of a convex spherical surface part 4 and connector parts 15, 15, and through- holes 18 formed on each of the connector parts 15 constitute a passage 20 by being communicated with each other through a hollow part 19 formed inside of the convex spherical surface part 4. An arm as an oscillating member to be connected to each of the connector parts 15 of the inner ring 2 is free to three-dimensionally oscillate by rolling of a rolling body 13 in relation to the outer ring 3 installed on a frame. Various kinds of the cords C for activating a working means provided on the arm are never exposed to outside by passing it through the inside of the passage 20 and never damaged.
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