Hydraulic cylinder retractable closed automatic locking mechanism with elastic jaws

Abstract

The invention belongs to the field of hydraulic cylinders, and in particular discloses a retractable closed-type automatic locking mechanism for hydraulic cylinders with elastic claws; the technical problem to be solved is to provide a simple and compact structure that does not require additional Operation action, the hydraulic cylinder realizes the locking and unlocking action while the hydraulic cylinder realizes the telescopic action, and the hydraulic cylinder uses the retractable closed automatic locking mechanism of the elastic jaw; including the cylinder barrel, the rear cylinder cover, the piston rod, the piston, and the elastic outer jaw And the inner cone guide lock sleeve, the cylinder barrel and the rear cylinder head are threaded, the outer diameter of the cylinder barrel and the inner wall of the rear cylinder head have a gap, the piston rod is movable in the cylinder barrel, the piston is set on the front end of the piston rod, and the elastic outer claw is threaded on the At the front end of the piston, the inner cone guide lock sleeve is pressed tightly on the step of the rear cylinder head by the cylinder barrel, and the outer diameter of the inner cone guide lock sleeve matches the inner diameter of the rear cylinder head; through the outer clamping step of the elastic claw and the inner cone guide lock The sleeves are interlocked to implement locking when the hydraulic cylinder is retracted.

Description

technical field [0001] The invention belongs to the field of hydraulic cylinders, and in particular relates to a retractable closed automatic locking mechanism for hydraulic cylinders, which is mainly used for long-term reliable locking of military equipment and civil engineering vehicles in the parking state and transportation state when the vehicle is loaded. , and will not appear in the hydraulic cylinder where the equipment on the vehicle is deployed and displaced. Background technique [0002] In various fields of national economic production such as national defense, engineering, mining, metallurgical machinery, and water conservancy projects, hydraulic cylinders use elastic jaws to retract closed automatic locking mechanisms (the working principle of the cylinder and the hydraulic cylinder are the same, the following is referred to as the hydraulic cylinder) As an actuator that drives and bears a large load, it is often required to have a locking and positioning funct...

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Problems solved by technology

[0003] Locking mechanisms in the retracted state are currently widely used: outside the retracted hydraulic cylinder, the movable mechanism to be locked and the vehicle fixing mechanism are mechanically connected and locked. This method ensures that the locked part is fixed reliably and safely. Add connecting device between part and fixed mechanism, and increase the difficulty of machining at the same time

Another way to install a hydraulic valve lock in the system to cut off the passage and seal the pressure oil and gas cavity to seal the liquid to realize the locking of the hydraulic cylinder. Since the sealing technology allows a certain amount of leakage, it cannot meet the needs of long-term stable locking conditions. In occasions with high safety requirements, it is generally not used

[0004] Others, such as the screw screw piston rod locking form, require a special power mechanism and power source in each hydraulic cylinder, the additional system is complicated and the mechanism is huge; the conical surface friction compression locking mechanism is simple, but the conical surface compression reverse thrust is limited ;Interference locking has very strict requirements on the amount of interference, which is controlled within a few wires. At the same time, the requirements for product raw materials, machining processes, and heat treatment are correspondingly increased, resulting in difficult processing and low yield

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