| 摘要 |
The present invention relates to a telescopic actuator comprising a cylinder 1 receiving a main rod 2 to slide along a sliding axis X between a retracted position and an extended position, the actuator further including an auxiliary rod 20 slidable in the main rod 2 between a retracted position and an extended position, and a rotary bearing 102 carried by the main rod 2 or the auxiliary rod 20 and co-operating respectively with the auxiliary rod 20 or the main rod 2 via a reversible helical connection. According to the invention, the actuator includes retaining means 112 for retaining the sliding of the auxiliary rod 20 and comprising a blocking member 116 arranged to act directly on the rotary bearing so as to cause rotation of the rotary bearing 102 to be blocked or to be released, blocking rotation of the rotary bearing 102 preventing the auxiliary rod 20 from moving in the main rod 2.
|
