Hydraulic floating snap ring lock

Abstract

The invention discloses a hydraulic floating snap ring lock and aims to provide a snap ring lock capable of solving the problem of unreliable performance of a steel ball lock due to scratch of a steel ball on an unlocking or locking surface caused by unlocking or locking. According to the technical scheme of the hydraulic floating snap ring lock, on a hydraulic lock housing of an actuator cylinder, a first shuttle valve seat is connected with a second shuttle valve seat through a shuttle valve sleeve; a shuttle valve element moving in the shuttle valve sleeve and a spring for pushing the shuttle valve element to be reset are integrated in theshuttle valve cavity of the cavity body of thehydraulic lock housing to form a shuttle valve for communicating the raising cavityof the actuator cylinderwith the lowering cavity of the actuator cylinder during extension of the actuator cylinder and separating the raising cavity of the actuator cylinder from the lowering cavity of the actuator cylinder during retraction of the actuator cylinder; when a first spring ring (10) is driven by a retainer (9) to completely pass through a snap ring seat (6), the floating snap ring lock is completelyunlocked, a seal cavity is formed in the conical surface of the first shuttle valve seat (16), the raising cavity is separated from the oil return passage of a system, and return oil in the raising cavity enters the lowering cavity of the actuator cylinder through the shuttle valve to realize a quick lowering function.

Description

technical field [0001] The invention relates to a hydraulic floating clasp lock for the actuator of the hydraulic system: the actuator. Background technique [0002] The actuator, also known as the hydraulic cylinder, is a common type of actuator in the hydraulic transmission system. It is an energy conversion device used to realize the linear reciprocating motion of the working mechanism or the swing motion of less than 360 degrees. The length of the actuator is adjustable, and there is an inner locking mechanism inside, which can lock the actuator in the fully extended position. The locking device of the actuator as the actuator of the hydraulic system can reliably lock the piston rod in the extended and retracted positions. The specific forms include steel ball locks, snap ring locks, friction locks, hydraulic locks, etc. There are hook locks and pole locks commonly used. The hook lock is usually actuated by a lock actuator, rocker arm and connecting rod. When the lock...

AI Technical Summary

Problems solved by technology

If the rubber ring on the piston is damaged, the high-pressure oil in the working chamber will leak to the non-working chamber, which will reduce the working pressure, increase the back pressure, and slow the movement of the piston rod.

The second is that the inner wall of the outer cylinder, the tapered piston and the piston are corroded, or the chromium layer on the movable rod falls off, which will increase the friction of the movable rod, and will also accelerate the wear of the sealing device, making the movable rod move slowly.

If the inner wall of the outer cylinder is partially scratched or the local friction of the actuator is increased, the movement speed of the piston rod will be uneven or intermittent; if the assembly is improper, it will also cause the piston rod to move slowly.

(2) The steel ball lock is inflexible in unlocking and locking, mainly due to poor sealing of the actuator or excessive friction of the piston. cannot be locked

(3) The lock of the steel ball lock is not reliable. The general reason is: the steel ball hole and the lock groove are worn and bruised, so that the activity gap of the steel ball lock is too large

Third, the snap ring and lock groove must have sufficient strength

Because after the piston rod is subjected to external force, the oil pressure in the lower chamber will increase, so that the oil pressure force will offset part of the external force, thus affecting the accuracy of measurement

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