Hydraulic cylinder mechanical locking device, mechanically-locked hydraulic cylinder and locking method of hydraulic cylinder

Abstract

The invention relates to a hydraulic cylinder mechanical locking device which comprises a secondary piston, a secondary rod and a nut holding frame. The secondary rod is mounted in a mounting through hole of the secondary piston, a positioning ring of the secondary rod and a positioning step of the secondary piston are mutually matched and positioned, one end of the nut holding frame with a counter bore can axially translate along the secondary rod and is inserted into or drawn out of a cavity between a baffle ring of the secondary piston and the outside of the secondary rod, and a steel ball in the nut holding frame can be clamped into or drawn out of an annular groove of the secondary rod in the translation process of the nut holding frame. The invention further discloses a mechanically-locked hydraulic cylinder base don the hydraulic cylinder mechanical locking device and a locking method of the hydraulic cylinder. According to the locking device, the steel ball cannot contact with the hydraulic cylinder, the hydraulic cylinder cannot be damaged, unlocking pressure ranges from 0.5MPa to 1MPa and is low and uniform, synchronism in the unlocking process is good, force bearing points are positioned on the steel ball and the nut holding frame, locking force is large, impact loads can be born, the locking device is high in positioning accuracy, service life is prolonged, and the locking effect of the hydraulic cylinder is improved.

Description

technical field [0001] The invention relates to a hydraulic cylinder assembly, which belongs to the field of hydraulic machinery equipment. More specifically, the invention relates to a mechanical locking device for a hydraulic cylinder. Based on the mechanical locking device for a hydraulic cylinder, the invention also discloses a mechanical locking device. Hydraulic cylinder and its locking method. Background technique [0002] As the executive element in the hydraulic system, the hydraulic cylinder has the characteristics of smooth movement, low noise and large load, and is widely used. The action of the oil cylinder is controlled by the hydraulic valve. In general engineering hydraulic systems, the hydraulic cylinder stays at any position or at a fixed point and bears a certain load force, which is realized by a hydraulic locking circuit. But the internal leakage of the hydraulic valve is inevitable. In some special fields (such as aviation and military), it is necess...

AI Technical Summary

Problems solved by technology

[0005] Based on the above technical problems, the present invention provides a hydraulic cylinder mechanical locking device, which solves the technical problems of easy damage to the seal, high and uneven unlocking pressure, and low load bearing capacity when the hydraulic cylinder is unlocked in the past; at the same time, the present invention also provides Disclosed is a mechanical locking hydraulic cylinder and its locking method

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