RUP type U-shaped ring for piston rod

Abstract

The invention discloses a RUP type U-shaped ring for a piston rod. The U-shaped ring comprises a U-shaped ring body in the shape of lips, an O-shaped ring made of rubber is arranged between two lips of the U-shaped ring body, a check ring made of high-hardness materials is arranged at the root portion of the U-shaped ring body, and the cross section of the check ring is square. A point end protrudes from the top of the U-shaped ring body, the depth of the part, embedded between the two lips of the U-shaped ring body, of the check ring is three fourths to nine tenths of the depth of the two lips, and the thickness of the check ring is one third to one half of the thickness of the U-shaped ring body. According to the RUP type U-shaped ring for the piston rod, the O-shaped ring made of rubber is added between the two lips of the U-shaped ring body, the check ring made of the high-hardness materials is added to the root portion of the U-shaped ring body, and therefore the U-shaped ring can be prevented from being squeezed out, the sealing effect is enhanced, and the service life is prolonged; an oil cylinder body and other sealing parts are effectively protected against damage, the phenomenon that the U-shaped ring is squeezed out is avoided, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of a plastic-sealed U-ring for a piston rod, in particular to a RUP-type U-ring for a piston rod that prevents extrusion, increases sealing effect and prolongs service life. Background technique [0002] At present, the products of U-rings for piston rods in the prior art only have U-ring bodies, such as figure 2 As shown, under high pressure, the U-ring body will be extruded, and after the two lips are compressed, the resilience is low, resulting in poor sealing effect or even failure. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of U-ring for RUP type piston rod, this RUP type U-ring for piston rod adds the O-ring of rubber material between the two lips and the body of U-ring A retaining ring of high-hardness material is added to the root of the U-ring, which can prevent the U-ring from being extruded, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the products of U-rings for piston rods in the prior art only have U-ring bodies, such as figure 2 As shown, under high pressure, the U-ring body will be extruded, and after the two lips are compressed, the resilience is low, resulting in poor sealing effect or even failure

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