CN217301104U

CN217301104U - Oil cylinder structure convenient for sealing assembly

Info

Publication number: CN217301104U
Application number: CN202220483593.1U
Authority: CN
Inventors: 宗美山
Original assignee: Luoyang Hengsai Machinery Equipment Co Ltd
Current assignee: Luoyang Hengsai Machinery Equipment Co Ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-08-26
Anticipated expiration: 2032-03-07

Abstract

The utility model relates to a hydraulic seal's technical field, specifically an hydro-cylinder structure convenient to seal assembly, including cylinder body and piston seat, the piston seat includes the body, the one end fixedly connected with diameter that lies in the cylinder body during body installation is less than the platform stage of body, the cover is equipped with the pretensioning piece that external diameter and body are the same in the platform stage, step section length is the same with pretensioning piece length, V type annular has been seted up with body lateral surface seam crossing along the pretensioning piece, install the sealing washer in the V type annular, the sealing washer cross section is triangle-shaped, the inboard contained angle of sealing washer is the same with the inboard contained angle of V type annular groove. This application increases the pressure of sealing washer and cylinder body contact surface through the inclined plane extrusion, improves resistance to compression sealing performance, and through putting into the body of recompression behind the sealing washer, has reduced frictional deformation in the sealing washer installation, influences the possibility of leakproofness.

Description

Oil cylinder structure convenient for sealing assembly

Technical Field

The application relates to the technical field of hydraulic sealing, in particular to an oil cylinder structure convenient for sealing assembly.

Background

The hydraulic oil cylinder needs good sealing performance during installation, and is usually sealed by an O-shaped sealing ring, and during assembly, the O-shaped sealing ring may be squeezed and rubbed to be distorted and deformed, and cannot be located at a reasonable sealing position, so that the sealing effect is poor.

In the patent document CN210218300U, the dumbbell-shaped seal ring is used to reduce the possibility of torsional deformation caused by the friction of the seal ring during installation. Because the hydraulic cylinder usually needs to bear higher pressure, the inside and the outside of the sealing ring have higher pressure difference, and the sealing ring can deform under the high-pressure condition to influence the sealing effect.

Disclosure of Invention

To the not enough that prior art exists, the purpose of this application is to provide one kind and bears highly compressed hydro-cylinder structure of being convenient for seal assembly better.

The above application purpose of the present application is achieved by the following technical solutions:

the utility model provides an hydro-cylinder structure convenient to seal assembly, includes cylinder body and piston seat, the piston seat includes the body, be located during the body installation one end fixedly connected with diameter in the cylinder body is less than the platform stage of body, the cover is equipped with the external diameter with the same pretension piece of body in the platform stage, the step section length with pretension piece length is the same, follows the pretension piece with V type annular has been seted up to body lateral surface seam crossing, V type annular installs the sealing washer in the interior, the sealing washer cross section is triangle-shaped, the inboard contained angle of sealing washer with the inboard contained angle of V type annular is the same.

Optionally, the outer side of the sealing ring is provided with an arc surface.

Optionally, the inner ring of the sealing ring is a plane.

Optionally, the deviation in the length dimension of the step section is 0.

Optionally, the included angle inside the V-shaped ring groove is α, 60 ° < α <90 °.

Optionally, the two side faces of the sealing ring are both provided with annular protrusions, and the cross sections of the annular protrusions are semicircular.

Optionally, two annular protrusions are arranged on each side of the sealing ring.

Optionally, the sealing ring is made of polyurethane.

To sum up, the application comprises the following beneficial technical effects:

the sealing ring is arranged after the pre-tightening piece is installed, and then the sealing ring is extruded by the inclined plane of the body and the pre-tightening piece to complete sealing. The pressure of the contact surface of the sealing ring and the cylinder body is increased through the inclined plane extrusion, the compression-resistant sealing performance is improved, and the possibility that the sealing performance is influenced due to the fact that the sealing ring is arranged and then the body is pressed is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a cross-sectional view of a seal ring according to an embodiment of the present application.

Reference numerals are as follows: 1. a cylinder body; 2. a piston seat; 21. a body; 22. a stage of stage; 23. pre-tightening piece; 24. A V-shaped ring groove; 25. a seal ring; 251. an annular protrusion.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

In order to more clearly understand the technical solution shown in the embodiments of the present application, first, the working principle of the existing oil cylinder structure convenient for sealing assembly is described.

The existing oil cylinder structure convenient for sealing assembly reduces the situation that the sealing ring is likely to be extruded and rubbed to generate distortion when being installed by using the dumbbell-shaped sealing ring.

From the perspective of a user, because the hydraulic oil cylinder generally needs to bear higher pressure, higher pressure difference exists between the inside and the outside of the sealing ring, and the sealing ring may deform under a high-pressure condition to influence the sealing effect.

Please refer to fig. 1-2, which are illustrations of the present application, a cylinder structure convenient for sealing assembly is disclosed, comprising a cylinder body 1 and a piston seat 2, the piston seat 2 includes a body 21, one end of the body 21 located in the cylinder body 1 is fixedly connected with a step section 22 having a diameter smaller than that of the body 21 when being installed, the step section 22 is sleeved with a preload piece 23 having an outer diameter identical to that of the body 21, the step section 22 has a length identical to that of the preload piece 23, a V-shaped ring groove 24 is provided along a seam between the preload piece 23 and an outer side surface of the body 21, a seal ring 25 is installed in the V-shaped ring groove 24, a cross section of the seal ring 25 is triangular, and an inner side included angle of the seal ring 25 is identical to an inner side included angle of the V-shaped ring groove 24.

Specifically, a V-shaped ring groove 24 is formed between the preload member 23 and the body 21, and a seal ring 25 is fitted in the V-shaped ring groove 24.

Thus, the sealing is completed by installing the preload member 23, placing the packing 25, and pressing the packing 25 by the inclined surfaces of the body 21 and the preload member 23. The pressure of the contact surface of the sealing ring 25 and the cylinder body 1 is increased through the inclined plane extrusion, the compression-resistant sealing performance is improved, meanwhile, the sealing ring 25 is placed in and then the body 21 is pressed in, and the possibility that the sealing ring 25 is subjected to frictional deformation in the installation process and the sealing performance is influenced is reduced.

In some feasible manners, a chamfer is formed at the position, close to the edge of the V-shaped ring groove 24, of the body 21, the same chamfer is formed at the position, close to the edge of the V-shaped ring groove 24, of the preload piece 23, the two chamfers form the V-shaped ring groove 24, and for convenience of installation, a chamfer is arranged at one end, close to the V-shaped ring groove 24, of the inner side surface of the preload piece 23.

As a specific implementation mode of the oil cylinder structure convenient for sealing assembly provided by the application, the outer side of the sealing ring 25 is provided with a cambered surface.

On the whole, through setting up the cambered surface, be convenient for the sealing washer 25 to put into, make body 21 put into when the extrusion sealing washer 25 upwards rises, increase sealed effect.

Further, the inner ring of the seal ring 25 is a plane.

The situation that the sealing effect and the assembling precision are influenced when the inner ring of the sealing ring 25 is clamped between the body 21 and the pre-tightening piece 23 is reduced by combining a specific use scene.

As a specific embodiment of the oil cylinder structure for facilitating the sealing assembly provided by the application, the deviation in the length dimension of the step section 22 is 0.

It will be appreciated that the sealing ring 25 increases the sealing effect by the pressure between the body 21 and the preload member 23, and that an excessively long dimension of the step section 22 may affect the squeezing effect between the preload member 23 and the body 21.

As a specific embodiment of the oil cylinder structure convenient for sealing and assembling provided by the application, the included angle of the inner side of the V-shaped ring groove 24 is α, 60 ° < α <90 °.

It will be appreciated that when the included angle is large, insufficient axial support of the seal ring 25 within the V-shaped groove 24 at high pressure may cause deformation, and when the included angle is small, the seal ring 25 is narrow, and may cause the seal ring 25 to have insufficient axial strength and deform at high pressure.

As a specific embodiment of the oil cylinder structure convenient for sealing and assembling provided by the application, please refer to fig. 3, two side surfaces of the sealing ring 25 are both provided with annular protrusions 251, and the cross section of the annular protrusions 251 is semicircular.

It will be appreciated that the sealing of the seal ring 25 against the side wall of the V-ring groove 24 is increased by the annular projection 251.

In some possible modes, the annular protrusion 251 is a circular ring with a semicircular cross section, the annular protrusion 251 is integrated with the sealing ring 25, and further, two annular protrusions 251 are arranged on each side of the sealing ring 25.

As a specific embodiment of the oil cylinder structure provided by the application, which is convenient for sealing assembly, the sealing ring 25 is made of polyurethane material.

It is understood that polyurethane materials have good mechanical properties, wear resistance, high pressure resistance and oil resistance.

The embodiments of the present invention are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an hydro-cylinder structure convenient to seal assembly, includes cylinder body (1) and piston seat (2), its characterized in that: piston seat (2) include body (21), be located during body (21) installation one end fixedly connected with diameter in cylinder body (1) is less than platform stage (22) of body (21), the cover is equipped with the external diameter with the same pretensioning piece (23) of body (21) on platform stage (22), platform stage (22) length with pretensioning piece (23) length is the same, follows pretensioning piece (23) with V type annular (24) have been seted up to body (21) lateral surface seam crossing, V type annular (24) internally mounted has sealing washer (25), sealing washer (25) cross section is triangle-shaped, sealing washer (25) inboard contained angle with V type annular (24) inboard contained angle is the same.

2. The cylinder structure convenient for sealing assembly according to claim 1, wherein: the outer side of the sealing ring (25) is provided with a cambered surface.

3. The cylinder structure convenient for sealing assembly according to claim 2, wherein: the inner ring of the sealing ring (25) is a plane.

4. The cylinder structure convenient for sealing assembly according to claim 1, wherein: the table stage (22) has a deviation of 0 in length dimension.

5. The cylinder structure convenient for sealing assembly according to claim 1, wherein: the included angle of the inner side of the V-shaped ring groove (24) is alpha, and the included angle is more than 60 degrees and less than alpha and less than 90 degrees.

6. The cylinder structure convenient for sealing assembly according to claim 1, wherein: and two side surfaces of the sealing ring (25) are respectively provided with an annular bulge (251), and the cross section of each annular bulge (251) is semicircular.

7. The cylinder structure convenient for sealing assembly according to claim 6, wherein: two annular protrusions (251) are arranged on each side of the sealing ring (25).

8. The cylinder structure convenient for sealing assembly according to claim 1, wherein: the sealing ring (25) is made of polyurethane material.