Actuator cylinder for folding stay bar and folding stay bar structure

Abstract

The invention discloses an actuator cylinder for a folding stay bar and a folding stay bar structure. The actuator cylinder is of a sleeve type structure, and an oil way is arranged on the side wall of a cylinder barrel; a bush which can bi-directionally move relative to a piston rod is arranged at one end of the piston rod, and an elastic element is arranged between the bush and the cylinder barrel. When a rodless cavity of the actuator cylinder has no oil pressure, the piston rod and the bush can completely extend out by the spring force; when the rodless cavity of the actuator cylinder applies pressure, the oil pressure overcomes the spring force to drive the piston rod and the bush to realize the withdrawal function of an eyebolt at the end part. The folding stay bar of the actuator cylinder structurally comprises the actuator cylinder. A rotary joint with an inlet and outlet oil way is integrated in an earhole in the end of the cylinder barrel, and a spring is integrated on the actuator cylinder, so that the structure is simplified, the layout space of a pipeline, the joint and the external spring is omitted, the system weight is reduced. The actuator cylinder can be applied to the folding stay bar structure with a narrow space, strict weight control and need for unfolding locking.

Description

technical field [0001] The invention relates to a foldable strut used as a moving cylinder and a foldable strut structure, which belongs to the field of aviation hydraulic accessories and is mainly used in a foldable strut with narrow space arrangement, strict weight requirements, lockable and unlockable foldable when unfolding in structure. Background technique [0002] In order to meet the requirements of aircraft landing gear retraction, foldable struts are usually arranged on the landing gear, and the eccentricity, locking deflection and stop surface of the foldable strut structure are used to maintain the locking deflection under the action of an external spring. It can withstand the compressive load when it is fully deployed. When the landing gear is retracted and the strut needs to be folded, use the unlock actuator to return the deflection of the strut to zero and form the eccentric deflection on the other side, thereby realizing the folding function of the strut. ....

AI Technical Summary

Problems solved by technology

[0003] At present, independent double springs are often used at home and abroad to maintain the locking deflection of the strut structure, and the unlocking actuator is used to unlock the strut (to return the locking deflection of the strut to zero and form an eccentric deflection on the other side). Occupying a large space, complex structure and heavy weight, it is not suitable for the use of arranging small foldable struts in a small space, which will have an adverse effect on the weight reduction and space utilization of the aircraft

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