Patent ID: 7980982

Claim:
A telescopic actuator, comprising: a planetary reduction gear housed in a first housing with a first housing opening; a screw feed mechanism housed in a second housing with a second housing opening, wherein the second housing supports a thrust force acting on a thrust-receiving flange provided to a male thread member of the screw feed mechanism and the first housing opening is connected to the second housing opening in an axial direction; and a ring gear of the reduction gear is screwed into an inner peripheral surface of the first housing through the first housing opening, wherein the thrust-receiving flange is held by a locknut screwed into an inner peripheral surface of the second housing through the second housing opening, the locknut and the ring gear face each other in the axial direction with a slight gap provided therebetween in a state where the first and second housings are connected to each other, and the telescopic actuator converts a rotation of a rotating shaft of a motor into expansion and contraction movements of an output rod via the planetary reduction gear and the screw feed mechanism.