Two-section nitrogen spring with noise reduction and anti-galling function

Abstract

The invention discloses a two-section nitrogen spring with a noise-reduction and anti-galling function, the two-section nitrogen spring comprises a cylinder body, an air inlet hole communicates with ahigh-pressure nitrogen chamber in the cylinder body, the air inlet hole is internally provided with an air charging valve, a liner is arranged in the cylinder body, a buffer chamber is formed at thebottom of the high-pressure nitrogen chamber, a first piston rod is arranged in the liner above the buffer chamber, the first piston rod is of hollow structure, and an annular groove is arranged alongthe bottom of the first piston rod, a second piston rod passes through the first piston rod, a chamber is arranged at the center of the lower part of the second piston rod, a pressure receiving diskis in bolted connection to the upper end of the second piston rod, and a noise reduction groove is formed in the upper surface of the pressure receiving disk. The obvious effects are that: the nitrogen spring travel problem in the current market is solved; the pressure surface is enlarged by the pressure receiving disk, so that the return force of the nitrogen spring is more stable; the contact noise is reduced; and the bottom of the first piston rod is prevented from galling, and thus returning or suddenly jumping of the first piston rod are avoided.

Description

technical field [0001] The invention relates to the technical field of piston rod type gas spring devices, in particular to a two-stage nitrogen gas spring with noise reduction and anti-seizure functions. Background technique [0002] Nitrogen gas spring is a component with elastic function. It seals high-pressure nitrogen gas in a certain container. The external force compresses the nitrogen gas through the piston rod. When the external force is removed, the high-pressure nitrogen gas expands to obtain a certain spring force. It is mainly composed of cylinder, guide seat, sealing ring, O-ring and piston rod. Compared with the traditional steel wire spring, the nitrogen spring can provide several times more return force in the same space, so it can be widely used not only in the mold industry, but also in other industrial fields, such as automobile, electronics, instrumentation and other industries. However, at present, nitrogen gas springs have not completely replaced stee...

AI Technical Summary

Problems solved by technology

However, when the piston overstrokes or the lubricating fluid is added too much, it is easy to make the bottom of the nitrogen gas spring sink into the lubricating fluid during the downward pressure process, which will cause the initial return stroke to be weak or directly stuck at the bottom

At the same time, during each stamping process, the collision of the contact surface of the nitrogen gas spring and the extrusion of the air produce a blasting sound, which causes strong noise pollution to the production environment

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