| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator capable of preventing condensation in a housing.SOLUTION: An actuator 10 is composed of an actuator body 11 and a release pipe 18. The actuator body 11 is equipped with a motor unit 50, a ball screw shaft 70, a slide portion 60 provided with a ball screw nut 62, a rod 12 moving forward/backward in an axial direction, and a housing 20. The housing 20 is formed with an internal space R1 in which the motor unit 50, the ball screw shaft 70, and the slide portion 60 are water-tightly protected while a part of the rod 12 projects. The housing 20 is equipped with an inlet and outlet port 40a for keeping the inner pressure of the internal space R1 equal to the outside air pressure. Connection of the release pipe 18 to the inlet and outlet port 40a of the housing 20 causes outside air to be unlikely to enter the housing 20. |
