Self-adaption lateral-bending-wear-resisting oil cylinder structure

Abstract

The invention belongs to the technical field of oil cylinders and particularly relates to a self-adaption lateral-bending-wear-resisting oil cylinder structure comprising a cylinder barrel, a piston rod end structure and a piston end structure. A piston rod is arranged in the cylinder barrel. The piston rod end structure and the piston end structure between the cylinder barrel and the piston rod are provided with a separated type supporting structure and a seal structure correspondingly. The piston end structure is located at the end, close to the cylinder bottom, of the piston rod in the cylinder barrel. The piston rod end structure located at the other end of the piston rod is located at the cylinder barrel. A guide sleeve is arranged between a gland and the cylinder barrel. The seal structure is located between the guide sleeve and the piston rod. The self-adaption lateral-bending-wear-resisting oil cylinder structure has the beneficial effects that the independent seal structure is adopted and does not participate in support, a seal piece fluctuates along with the piston rod and the cylinder barrel, and the situation that the seal piece is stressed unilaterally can be effectively avoided; the independent support structure is adopted, so that a larger matching interval can be adopted, and the possibility that relative movement parts except a guide ring make contact due to flexure is effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of oil cylinders, and in particular relates to a self-adaptive anti-side bending and wear-resistant oil cylinder structure. Background technique [0002] Some applications require cylinders with long installation distance, long stroke, high thrust, or side load requirements. Even if the pressure bar stability calculation check (Euler's formula) is satisfied, due to the limitation of traditional structure and machining accuracy, the cylinder is prone to side bending and component wear. [0003] Due to the long installation distance and stroke, the corresponding cylinder and piston rod are also long. During use, factors such as self-weight, thrust, and lateral force also cause the overall straightness of the cylinder to be inferior to short-stroke and short installation distance cylinders. . [0004] When the oil cylinder is placed horizontally, the self-weight will cause one side of the seal to be stressed,...

AI Technical Summary

Problems solved by technology

Even if the pressure bar stability calculation check (Euler's formula) is met, due to the limitations of traditional structure and machining accuracy, the cylinder is prone to side bending and component wear

[0003] Due to the long installation distance and stroke, the corresponding cylinder and piston rod are also long. During use, factors such as self-weight, thrust, and lateral force also cause the overall straightness of the cylinder to be inferior to short-stroke and short installation distance cylinders.

[0004] When the oil cylinder is placed horizontally, the self-weight will cause one side of the seal to be stressed, so that the compression on both sides of the seal will be different; uneven force during operation will easily cause one side of the seal to wear

Even for a long oil cylinder used vertically, the deflection will increase under the influence of length and thrust. Although the design can pass the stability check of the pressure rod, it can ensure that the oil cylinder does not bend, but the piston and cylinder, piston rod Direct contact with the guide sleeve, mutual scraping, etc. also often occur, and the final result is damage to the parts and failure of the sealing structure

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