Nitrogen spring with multiple protection functions

Abstract

The invention discloses a nitrogen spring with multiple protection functions. The nitrogen spring comprises a cylinder, a bushing, a piston rod, an outer sealing ring, a retaining ring and an inner sealing ring, wherein the cylinder comprises a cylinder body, a limiting groove for fixing the bushing is formed on the upper part of the inner side wall of the cylinder body, and a deformation guidinggroove and a first deformation groove are further formed in the inner wall of the cylinder body; the bushing comprises a bushing body, and the outer wall of the bushing body is provided with a sealingring mounting groove and a second deformation groove; and the bottom of the piston rod forms a limiting ring, and an inner concave section, a conical surface section and an arc transition section which are sequentially connected are formed between the piston rod and the limiting ring. The nitrogen spring has the obvious effects that multiple protections are provided for the nitrogen spring in theuse process, thereby effectively avoiding the cylinder explosion phenomenon; and meanwhile, when the nitrogen spring is damaged, the nitrogen spring is deflated through sealing failure, so that the safety protection effect is achieved.

Description

technical field [0001] The invention relates to the technical field of nitrogen gas spring production, in particular to a nitrogen gas spring with multiple protection functions. Background technique [0002] In the mold industry, a large number of elastic components have been used; over the years, the mold technology and mold manufacturing level have been greatly developed and improved, and the demand for molds for industrial products is increasing, and molds are moving toward precision, complexity, and high efficiency. , The direction of long life is developing rapidly. The nitrogen spring can provide a large return force, which has the advantages of saving mold space, simplifying mold design and manufacturing, reducing mold cost, and facilitating mold adjustment; it can be used as an independent component installed in the mold, or it can be designed as a nitrogen The spring system, as a part of the mold, participates in the work, and can easily realize the constant spring...

AI Technical Summary

Problems solved by technology

[0003] Nitrogen spring is a new type of elastic component with high-pressure nitrogen as the working medium. It has an inherent height and a standard use stroke during use. When the mold is in misoperation or failure, the mold exceeds the use stroke of the nitrogen spring, and because the nitrogen spring The interior is filled with high-pressure nitrogen gas, which can easily cause damage to the nitrogen gas spring or even cause cylinder explosion, which poses a high safety risk

[0004] At the same time, when the nitrogen gas spring is used alone, if the internal compression space is insufficient and the internal pressure increases due to the influence of the external environment, there is a risk of cylinder explosion; when used in series with the pipeline as a control unit, if the action unit is stuck due to mold or Limit and other reasons, but the cylinder of the control unit is still compressed, which will cause equipment damage or mold damage

[0005] In addition, the piston rod of the nitrogen gas spring is limited by the bushing, and the contact surface between the piston rod and the bushing is subjected to a downward force. In the case of long-term and high-frequency use, the contact part is prone to physical fatigue and fracture, while And due to the action of high-pressure gas inside the cylinder, the piston rod may fly out of the cylinder, posing a safety hazard

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