Locking device for multistage actuating cylinder

Abstract

The invention provides a locking device for a multistage actuating cylinder. The locking device comprises an end cover, an outer barrel, a middle barrel, an inner barrel, upper and lower sliding sleeves, upper and lower unlocking sleeves, upper and lower locking clamp rings, upper and lower limiting clamp rings, connecting screws, upper and lower elastic elements as well as upper and lower steel balls. A highly bearing steel ball locking mechanism is combined with the multistage actuating cylinder, so that the mechanism has high bearing capacity in a locked state, guarantees long unfolding travel of the actuating cylinder, realizes a reusable function on the basis of reliable locking and unlocking, and is applicable to landing support legs of reusable launch vehicles; meanwhile, the mechanism is simple to machine, convenient to mount, capable of realizing automatic collection and release and long in service life.

Description

technical field [0001] The present invention relates to a multi-stage jack locking device for reusable vehicle landing legs. Background technique [0002] With the successful launch and recovery of the reusable vehicle, the landing outriggers of the reusable vehicle are applied. In order to reduce the additional aerodynamic resistance caused by the landing outriggers installed on the surface of the vehicle, usually the landing outriggers need to shrink to In 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 must be fully extended when the landing legs are fully extended. After the landing, it is locked reliably by the locking device. After the landing and recov...

AI Technical Summary

Problems solved by technology

[0003] The traditional carrier landing outrigger retractable mechanism usually has a complex structure, which mainly releases the initial locking state through pyrotechnics, and then uses the torsion spring on the hinge of the unfolding bracket to realize the deployment. It can be seen that the traditional landing outrigger retractable Institutions are not reusable

Moreover, the traditional multi-stage retractable actuator usually does not have the function of automatic locking and unlocking, and cannot meet the requirements of high load-carrying capacity of the landing outriggers.

At the same time, for the traditional retractable actuator, it does not have the advantage of long deployment stroke brought by multi-stage deployment.

Images