| 摘要 |
PROBLEM TO BE SOLVED: To restrain the self-exited vibration of a rolling body effectively by pressing one side ball adjacent to a ball bearing against one side of the axial direction of a raceway track surface and the other side ball against the other side of the axial direction of the raceway track surface. SOLUTION: A preloading means 9 is installed in a holder 2d. This preloading means 9 restrains the movement of the axial direction of a ball 2c from the both sides and the center position of a pocket 4 is differed by a prescribed amount T in the axial direction and ajacent balls 2c1 , 2c2 are arranged in an offset. Under this constitution, the balls 2c1 , 2c2 in a differed state are pressed in the axial direction reversely against respective inner/outer raceway track surfaces 3b, 3a following to the rotation of the holder 2d. In other words, the ball 2c1 positioned on both sides is pressed against the left side of a drawing of the raceway track surface 3b and the central ball 2c2 is pressed against the right side of the drawing of the raceway track surface 3b. Thereby, the generation of a cool time abnormal noise caused by the self exited vibration of the balls 2c1 , 2c2 is prevented. |
