Hydraulic cylinder with buffering function

Abstract

The invention provides a hydraulic cylinder with a buffering function. The hydraulic cylinder comprises a cylinder tube, a cylinder bottom, a rear oil port, a front oil port, an elastic member, a piston, a first coil, a third coil, a piston rod, a guide sleeve, a second coil, a key, a blocking ring, a sealing ring and a sealing member; an inertial force generated by a hydraulic oil cylinder is counteracted by a magnetic force generated by an electromagnet to achieve the effect of reducing the vibration noise of the hydraulic oil cylinder. The energized coils are simple in structure and are notin contact with one another. A cushioning system has a high response speed and can be closed and stopped at any time; under the condition that the flow rate and pressure of a hydraulic system are thesame, the cylinder diameter size of the hydraulic oil cylinder can be effectively decreased, the work pressure is increased, and the work efficiency is improved. Since the strength of a magnetic field is inversely proportional to the square of distance, the magnetic force is increased significantly only when the piston approaches the end of a stroke, the piston is buffered, and the vibration andnoise at the end of the stroke of the hydraulic oil cylinder are reduced.

Description

technical field [0001] The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic cylinder with buffer. Background technique [0002] In construction machinery, the use environment of hydraulic cylinders is relatively harsh, and the load changes on hydraulic cylinders are more complicated. When a hydraulic cylinder drags a heavy component for high-speed motion to the end of its stroke, severe mechanical collisions often occur. In addition, the sudden stop of the piston often causes water hammer in the pressure pipeline, resulting in great impact and noise. The above mechanical shocks not only affect the working performance of construction machinery, but also damage hydraulic cylinders and other components of the hydraulic system, which is very dangerous. Research now shows that the impact of hydraulic cylinders mainly comes from inertial force, hydraulic thrust, overload and gravity, among which the effect of inertial force is the most...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the following problems in the prior art, the existing buffer devices adopt constant throttle type and variable throttle type buffer devices. The coaxiality of the piston rod and the cylinder guaranteed by the clearance fit and the shape and position tolerance of each component. When the coaxiality is not good, the hydraulic cylinder will often be strained and glued, and there are small orifice diameters, which are easy to Disadvantages such as blockage and high buffer pressure

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