| 摘要 |
PROBLEM TO BE SOLVED: To provide a downsized ball screw nut, a ball screw mechanism and an actuator.SOLUTION: A ball screw nut includes a ball screw nut body, and a U-shaped pipe installed on the outer periphery of the ball screw nut body and constituting a part of a non-load circulation passage for a rolling body. With this constitution, the ball screw nut body is downsized, and a projection amount of the non-load circulation passage to the outside of the ball screw nut body is reduced. Consequently, not only the ball screw nut, but also a slider and an actuator can be downsized.SELECTED DRAWING: Figure 2 |
