CN210661330U - Cylinder piston sealing structure adopting sealing ring - Google Patents

Abstract

The utility model provides a cylinder piston sealing structure adopting a sealing ring, which comprises a cylinder body and a piston arranged on the cylinder body, wherein a groove is arranged on the piston, a sealing ring is arranged in the groove, the cross section of the sealing ring comprises a round elastic bottom and a square part fixed on the elastic bottom, an extending part extending to the upper part of the groove is arranged at the top end of the side wall of the groove, a convex part protruding out of the extending part is arranged on the top surface of the square part far away from the elastic bottom, and the top surfaces of the square part and the bottom surfaces of the extending part on both sides of the convex part are inclined planes; the utility model provides an adopt cylinder body piston seal structure of sealing washer aims at improving the cylinder body piston and removes when the gas pocket, and the sealing washer can be extruded from the gas pocket, cuts the sealing washer, makes the problem of the leakproofness variation of sealing washer.

Description

Cylinder piston sealing structure adopting sealing ring

Technical Field

The utility model relates to a sealed field particularly, relates to a sealing washer of using on cylinder body piston and the cylinder body piston seal structure who adopts this sealing washer.

Background

At present, as shown in fig. 1, a cross section of a conventional cylinder piston sealing structure and a sealing ring used in the conventional cylinder piston sealing structure includes a first elastic bottom portion 41 and a first square portion 42, a first air hole 43 is formed in a side wall of a cylinder, a first groove 44 is formed in a cylinder piston, and the sealing ring is placed in the first groove.

When the piston acts to drive the sealing ring to move through the air hole I, as the aperture of the air hole I is smaller than the size of the top surface of the square part I, the part of the square part I can be separated from the restraint of the inner side wall of the cylinder body and is extruded out of the groove I, and the piston continuously moves the edge of the air hole I to cut the extruded part of the sealing ring, so that the sealing performance of the sealing ring is poor.

In view of the above, the inventor of the present application invented a cylinder piston sealing structure using a sealing ring.

Disclosure of Invention

The utility model provides an adopt cylinder body piston seal structure of sealing washer aims at improving the cylinder body piston and removes when the gas pocket, and the sealing washer can be extruded from the gas pocket, cuts the sealing washer, makes the problem of the leakproofness variation of sealing washer.

The utility model discloses a realize like this:

a cylinder piston sealing structure adopting a sealing ring comprises a cylinder body and a piston arranged on the cylinder body, wherein a groove is formed in the piston, the sealing ring is arranged in the groove, the cross section of the sealing ring comprises a round elastic bottom and a square part fixed on the elastic bottom, an extending part extending to the upper part of the groove is arranged at the top end of the side wall of the groove, a protruding part protruding out of the extending part is arranged on the top surface of the square part far away from the elastic bottom, the top surfaces of the square part and the bottom surface of the extending part on the two sides of the protruding part are inclined planes, the square part enables the top surfaces of the square part and the bottom surface of the extending part to be tightly attached through the extrusion of the elastic bottom, the sealing ring is extruded and deformed by the matching of the inner side wall of the cylinder body and the piston, so that the, and enabling the elastic bottom to be tightly attached to the groove.

Further, in a preferred embodiment of the present invention, a thickness of a portion of the protrusion protruding from the extension portion is larger than a size of a gap between the cylinder inner side wall and the piston.

Further, in the preferred embodiment of the present invention, the cylinder sidewall has an air hole, the sealing ring has a protrusion with a size larger than the aperture of the air hole, the bottom of the air hole is provided with a trapezoidal groove, the bottom of the trapezoidal groove has a size larger than the aperture of the air hole, and the sidewall of the trapezoidal groove and the included angle of the cylinder sidewall are 15 °.

Further, in the preferred embodiment of the present invention, the included angles between the top surface of the square portion and the bottom surface of the extension portion and the inner side wall of the cylinder body are both 30 °.

Further, in a preferred embodiment of the present invention, the bottom surface of the square portion contacting the elastic bottom portion is arc-shaped to increase the contact area between the square portion and the elastic bottom portion.

The utility model has the advantages that:

the utility model discloses a piston is when the action, when driving the sealing washer and removing through the gas pocket, because the effect of extension on the slot, make the part of sealing washer in the ditch inslot can not extrude, and the bulge although loses the restraint of cylinder body inside wall, but the dovetail groove plays the cushioning effect to the bulge, when the piston drives the bulge and leaves the dovetail groove, because the lateral wall of dovetail groove is the inclined plane, the bulge only to leaving the dovetail groove along the lateral wall in dovetail groove rises, can not cut the bulge of sealing washer, can not influence the leakproofness of sealing washer yet.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a cylinder-piston sealing structure in the prior art;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is an enlarged structural diagram of B in fig. 2.

Description of the main elements

A cylinder body 1, an air hole 11, a trapezoidal groove 12,

a piston 2,

The length of the groove 21, the extension 211,

a sealing ring 3, an elastic bottom 31,

The length of the square portion 32, the convex portion 321,

a first elastic bottom 41, a first square part 42, a first air hole 43 and a first groove 44.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Embodiment 1, referring to fig. 2 and 3, a sealing structure of a cylinder 1 and a piston 2 using a gasket 3 includes the cylinder 1 and the piston 2 disposed on the cylinder 1.

The piston 2 is provided with a groove 21, a sealing ring 3 is arranged in the groove 21, the cross section of the sealing ring 3 comprises a round elastic bottom 31 and a square part 32 fixed on the elastic bottom 31, the top end of the side wall of the groove 21 is provided with an extending part 211 extending to the upper side of the groove 21, the top surface of the square part 32 far away from the elastic bottom 31 is provided with a convex part 321 protruding out of the extending part 211, the top surfaces of the square part 32 and the bottom surface of the extending part 211 at the two sides of the convex part 321 are inclined surfaces, the square part 32 enables the top surfaces of the square part 32 and the bottom surface of the extending part 211 to be tightly attached through the extrusion of the elastic bottom 31, the sealing ring 3 is extruded and deformed by the matching of the inner side wall of the cylinder body 1 and the inner side wall of the piston 2, so that the convex part 321, so that the elastic bottom 31 is tightly attached to the groove 21.

When the piston 2 moves and drives the sealing ring 3 to move through the air hole 11, the part of the sealing ring 3 in the groove 21 is not extruded out due to the effect of the extension part 211 on the groove 21, so that the sealing performance of the sealing ring 3 is kept stable.

In the present embodiment, referring to fig. 2, the thickness of the portion of the protrusion 321 protruding from the extension 211 is larger than the gap between the inner sidewall of the cylinder 1 and the piston 2.

Wherein, the thickness of the part of the protrusion extension part 211 of the limiting convex part 321 is larger than the gap between the inner side wall of the cylinder 1 and the piston 2, so that the convex part 321 is pressed by the inner side wall of the cylinder 1, and the convex part 321 is tightly attached to the inner side wall of the cylinder 1 and the groove 21 respectively.

In this embodiment, referring to fig. 2, an air hole 11 has been seted up on the cylinder body 1 lateral wall, sealing washer 3 the size of bulge 321 is greater than the aperture of air hole 11, air hole 11 bottom is provided with trapezoidal groove 12, the tank bottom size of trapezoidal groove 12 is greater than the aperture of air hole 11, the lateral wall of trapezoidal groove 12 with the contained angle of cylinder body 1 lateral wall is 15.

Wherein, the bulge 321 is when the trapezoidal groove 12 is passed through under the drive of piston 2, and trapezoidal groove 12 plays the cushioning effect to bulge 321, and when piston 2 drove bulge 321 and left trapezoidal groove 12, because the lateral wall of trapezoidal groove 12 is the inclined plane, bulge 321 only to leaving trapezoidal groove 12 along the lateral wall of trapezoidal groove 12 rises, can not cut the bulge 321 of sealing washer 3, also can not influence the leakproofness of sealing washer 3.

In the present embodiment, referring to fig. 2 and 3, the top surface of the square portion 32 and the bottom surface of the extension portion 211 are both at an angle of 30 ° with respect to the inner side wall of the cylinder 1.

The top surface of the square portion 32 and the extension portion 211 are both provided with inclined surfaces, so that the contact area between the top surface and the extension portion 211 can be increased, and meanwhile, the cross section of the extension portion 211 is triangular, so that the stability of the extension portion 211 is further increased.

In this embodiment, referring to fig. 2 and 3, the bottom surface of the square portion 32 contacting the elastic bottom portion 31 is arc-shaped to increase the contact area between the two.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides an adopt cylinder body piston seal structure of sealing washer, its characterized in that, includes cylinder body and the piston of setting on the cylinder body, be provided with the slot on the piston, the sealing washer is equipped with in the slot, the cross section of sealing washer includes circular shape elasticity bottom, fixes the square portion on the elasticity bottom, slot lateral wall top is provided with the extension that extends to the slot top, the square portion is kept away from the top surface of elasticity bottom is provided with the bulge of outstanding extension, the square portion top surface of bulge both sides with the extension bottom surface is the inclined plane, and the square portion passes through the extrusion of elasticity bottom, makes the square portion top surface of bulge both sides with the extension bottom surface closely laminates, the cooperation of cylinder body inside wall and piston will the sealing washer extrusion deformation, makes the bulge with the cylinder body inside wall closely laminates, and enabling the elastic bottom to be tightly attached to the groove.

2. The cylinder piston sealing structure using the sealing ring according to claim 1, wherein: the thickness of the part of the bulge, which protrudes out of the extension part, is larger than the size of a gap between the inner side wall of the cylinder and the piston.

3. The cylinder piston sealing structure using the sealing ring according to claim 1, wherein: the gas pocket has been seted up on the cylinder body lateral wall, the sealing washer the size of bulge is greater than the aperture of gas pocket, the gas pocket bottom is provided with the dovetail groove, the tank bottom size in dovetail groove is greater than the aperture of gas pocket, the lateral wall in dovetail groove with the contained angle of cylinder body lateral wall is 15.

4. The cylinder piston sealing structure using the sealing ring according to claim 1, wherein: the top surface of the square part and the bottom surface of the extension part form an included angle of 30 degrees with the inner side wall of the cylinder body.

5. The cylinder piston sealing structure using the sealing ring according to claim 1, wherein: the bottom surface of the square part, which is in contact with the elastic bottom part, is arc-shaped so as to increase the contact area of the square part and the elastic bottom part.

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