| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball spline which secures capacity to bending moment and a radial load even under a condition that the outer diameter of an outer cylinder cannot be enlarged, nor the outer diameter of a shaft can be reduced. SOLUTION: A ball circulating path having a main passage 20 formed so that balls 16 receive a clockwise torque, and a ball circulating path having a main passage 20 formed so that balls 16 receive a counterclockwise torque, are formed as a pair. This pair of ball circulating paths are made as main ball circulating paths A, B, C, and three main ball circulating paths A, B, C are arranged at predetermined intervals. Auxiliary ball circulating paths D, E, F are provided between the adjacent main ball circulating paths A, B, C respectively. The auxiliary ball circulating paths D, E, F have a main passage 30 with no spline track formed so that the balls receive only the radial load without receiving clockwise and counterclockwise torques by providing neither the shaft 2 nor the outer cylinder 4 with a spline track. COPYRIGHT: (C)2011,JPO&INPIT
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