Vane type hydraulic actuator

摘要

The vane type hydraulic actuator according to the present invention comprises a guide locking mechanism (guide stopper pin) (1) for guiding the rotor (44) to a locking position where the rotor (44) can be locked to the case (43), and a retaining locking mechanism (retaining stopper pin) (4) for retaining the rotor (44) to the case (43), after the rotor (44) is guided to the locking position. The actuator having vanes, wherein the length in the peripheral direction of the tip portion of the vane having the locking mechanism is substantially identical to that of the vane which is located symmetrically thereto. The length in the peripheral direction of the tip portion of the other vanes is shorter than that of the vane having the locking mechanism.