| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device for correcting balance, capable of highly accurately measuring unbalance of a rotated body of which a part of a support hole is formed in a polygonal shape.SOLUTION: In a bearing device for correcting balance, from among the outer peripheral surface of a mandrel 11 to which a support hole 22 of a rotated body 1 having a polygonal cross-sectioned portion 26 on the tip side thereof is attached, escape holes 38 are provided at a location facing an inner surface 26a of the polygonal cross-sectioned portion for releasing pressure that changes with the rotation of the rotated body 1 in a space between the inner surface 26a of the polygonal cross-sectioned portion and the outer peripheral surface of the mandrel 11. Consequently, when measuring unbalance (dynamic unbalance), the pressure change generated in a space between the inner surface 26a of the polygonal cross-sectioned portion of the support hole 22 and the outer peripheral surface of the mandrel 11 escapes to the outside through the escape holes 38, suppressing the pressure change due to squeeze between the inner surface 26a of the polygonal cross-sectioned portion of the support hole 22 and the outer peripheral surface of the mandrel 11. |
