| 摘要 |
A double-acting hydraulic actuator with an axial locking device has a cylinder chamber defined by two coaxial cylindrical walls of different diameters interconnected by a frustoconical wall. A guide piston sliding in the smaller-diameter cylindrical wall is fixed to an end of an actuator rod. The actuator rod has an annular protuberance of diameter equal to the diameter of the cylindrical wall. An annular stepped piston providing sealing between the two cylinder chambers is slidably mounted in a middle portion of the actuator rod to slide between the piston and the annular protuberance. When the actuator is extended, a narrowed end of the annular piston bears against conical surfaces of two half-rings and urges them outwards. When the half-rings are pushed outwards and the narrowed end of the annular piston becomes interposed between them and the middle portion of the actuator rod. |
