A three-stage actuator with air intake/liquid at the end and its working method

Abstract

The invention discloses a three-stage actuator for air intake and exhaust at the end and its working method, comprising: an end cover, a first-section sleeve, a second-section sleeve, a third-section sleeve, an inner sleeve, Lock sleeve, spring, slide block, limit nut, support ring, sealing ring, annular contact piece, inner sleeve contact ring, steel ball, air pipe, movement conversion lever, push button switch. The main technical point of this mechanism is to use hydraulic / air pressure to drive the actuator to move, and rely on the action of the spring to make the inner sleeve and the slider move relative to each other, so as to realize the locking and unlocking of the steel ball lock, and finally achieve three-stage actuation. The barrel can be unfolded, locked and retracted to unlock. The mechanism cleverly uses the air pipe, so that the expanded and contracted oil (air) inlets and outlets are all at the end cover, which greatly facilitates the arrangement of the external drive system and the hydraulic (air) pressure pipeline. The device incorporates a mechanical travel switch, which has a higher accuracy and higher reliability in reflecting the movement travel of the sleeve than the inductive travel switch.

Description

technical field [0001] The invention relates to a three-stage actuating cylinder with the function of unfolding and locking, which has an exhaust gas / liquid intake at the end and a working method thereof, and belongs to the technical field of a vehicle returning to a landing outrigger. Background technique [0002] With the successful launch and recovery of the reusable carrier, the landing legs of the reusable carrier have been applied. In order to reduce the additional aerodynamic resistance caused by the landing legs installed on the surface of the carrier, the landing legs usually need to shrink at Inside the shell, when the vehicle is about to land, the landing legs are opened by means of pneumatic / hydraulic transmission. At the same time, since the carrier will generate a large impact load on the landing legs during the landing process, in order to ensure that the landing legs can reliably support the carrier under load and prevent the carrier from tipping over, it mus...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a three-stage actuating cylinder with air intake / exhaust / liquid at the end and its working method, so as to solve the traditional multi-stage retraction actuation in the prior art. The cylinder does not have the function of automatic locking and unlocking, cannot meet the requirements of high load capacity of the landing legs, and does not have the problem of long deployment stroke caused by multi-stage deployment

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