Hydraulic oil cylinder sealing ring with combined structure

Abstract

The utility model belongs to the technical field of hydraulic oil cylinder sealing rings, and particularly relates to a hydraulic oil cylinder sealing ring with a combined structure, which comprises an inner sealing ring, an outer sealing ring and a connecting cylinder, the inner wall of the connecting cylinder is connected with the inner sealing ring, the outer wall of the connecting cylinder is connected with the outer sealing ring, and the surface of the connecting cylinder is sleeved with an extension cylinder. A convex thread is connected to the surface of the connecting cylinder, a concave thread is arranged on the inner wall of the extending cylinder, a spring strip is connected to the interior of the connecting cylinder, a limiting block is connected to the end of the spring strip, a stand column is connected to the side, away from the spring strip, of the limiting block, and a cambered surface end cap is connected to the end, away from the limiting block, of the stand column. According to the utility model, the extension cylinders can move longitudinally through threaded connection of the convex threads and the concave threads when rotating, so that the distance between the two extension cylinders can be adjusted, outer sealing rings with different widths can be used in grooves formed between the two extension cylinders and the connecting cylinder, and the practicability can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic cylinder sealing rings, specifically relating to hydraulic cylinder sealing rings with a combined structure. Background Technology

[0002] Hydraulic cylinder seals, as a key component of hydraulic systems, are specially designed and installed inside hydraulic cylinders as annular elastic elements. Their core function is to utilize the unique elastic deformation properties of the material itself and the tight contact pressure generated between the seal and the contact surface to create a highly efficient and reliable sealing interface between the relatively moving key components within the hydraulic cylinder (such as the piston performing linear reciprocating motion, the piston rod passing through both ends of the cylinder body) and the stationary fixed components (such as the cylinder barrel bearing internal pressure, the end caps sealing both ends of the cylinder). This sealing interface not only effectively prevents hydraulic oil from leaking from the high-pressure chamber to the low-pressure chamber or the external environment under high pressure, thus maintaining the working pressure stability and energy transfer efficiency of the hydraulic system, but also acts as a physical barrier to prevent dust, moisture, impurities, and other contaminants from the external environment from entering the cylinder, protecting the cleanliness of the hydraulic oil and avoiding system failures and component wear caused by oil contamination.

[0003] In addition, under extreme conditions such as high-speed piston movement or sudden pressure changes, the sealing ring can absorb some of the impact energy through its own buffering effect, reduce vibration and noise, and work with auxiliary components such as support rings to guide the piston and piston rod to maintain a stable linear motion trajectory, prevent direct contact between metal parts and wear, extend the service life of the hydraulic cylinder, and ensure the long-term stable and efficient operation of the entire hydraulic system.

[0004] Existing modular hydraulic cylinder seals suffer from significant shortcomings in their design philosophy and practical application. Their core deficiency lies in their lack of adaptability to external seals of varying widths. This structural problem directly poses a severe challenge for users during equipment maintenance or performance upgrades: when hydraulic systems require replacement with external seals of different widths due to changes in operating conditions (such as pressure increases, temperature fluctuations, or changes in media properties), the fixed design of traditional modular seals (such as the non-adjustability of key parameters like groove width, groove depth, and sealing lip angle) prevents the new seals from effectively matching existing installation slots. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic cylinder sealing ring with a modular structure, which aims to solve the problem that when using a modular hydraulic cylinder sealing ring in the prior art, if the hydraulic system needs to replace the outer sealing ring with one of different widths due to changes in working conditions, the fixed design of the traditional modular sealing ring makes it impossible for the new sealing ring to effectively match the existing installation slot.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a combined hydraulic cylinder sealing ring, comprising an inner sealing ring, an outer sealing ring, and a connecting cylinder. The inner sealing ring is connected to the inner wall of the connecting cylinder, and the outer sealing ring is connected to the outer wall of the connecting cylinder. An extension cylinder is sleeved on the surface of the connecting cylinder, and the surface of the connecting cylinder is connected with a convex thread. The inner wall of the extension cylinder is provided with a concave thread. A spring strip is connected inside the connecting cylinder, and a limit block is connected to the end of the spring strip. A column is connected to the side of the limit block away from the spring strip, and an arc-shaped end cap is connected to the end of the column away from the limit block.

[0007] As a preferred embodiment of the hydraulic cylinder sealing ring of the combined structure of this utility model, the extension cylinder is symmetrically arranged at both ends of the connecting cylinder, and both the connecting cylinder and the extension cylinder are made of nitrile rubber (NBR).

[0008] As a preferred embodiment of the hydraulic cylinder sealing ring of the present invention, the extension cylinder is threadedly connected by a concave thread and a convex thread.

[0009] As a preferred embodiment of the combined structure of the hydraulic cylinder sealing ring of this utility model, the spring strip, limiting block, column and arc end cap are arranged in a circular array with the center line of the connecting cylinder as the center.

[0010] As a preferred embodiment of the combined structure of the hydraulic cylinder sealing ring of this utility model, the limiting block and the spring strip form an elastic telescopic structure.

[0011] As a preferred embodiment of the combined structure of the hydraulic cylinder sealing ring of this utility model, the limiting block and the column are an integral structure, and the arc-shaped end cap is made of fluororubber FKM material.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, the extension cylinder can move longitudinally through the threaded connection of the convex and concave threads when it rotates, which can adjust the distance between the two extension cylinders. This allows the grooves formed between the two extension cylinders and the connecting cylinder to use external sealing rings of different widths, thereby improving practicality.

[0014] In this invention, when the outer sealing ring is compressed, it can compress the arc-shaped end cap. The compression of the arc-shaped end cap can compress the spring strip through the column and the limiting block. After the force disappears, the spring strip can compress the limiting block to reset through its own elasticity. After the limiting block resets, it can drive the arc-shaped end cap to reset through the column. The reset of the arc-shaped end cap can compress the outer sealing ring to reset. This can improve the rebound effect of the outer sealing ring, thereby ensuring the sealing performance. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the present invention.

[0018] Figure 3 This is an exploded cross-sectional view of the present invention.

[0019] Figure 4 This is a schematic diagram of the inner sealing ring connection structure of this utility model;

[0020] Figure 5 This utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Inner sealing ring; 2. Outer sealing ring; 3. Connecting cylinder; 4. Extension cylinder; 5. Convex thread; 6. Concave thread; 7. Spring strip; 8. Limiting block; 9. Column; 10. Arc-shaped end cap. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 The present invention provides the following technical solution: a hydraulic cylinder sealing ring with a combined structure, including an inner sealing ring 1, an outer sealing ring 2 and a connecting cylinder 3. The inner sealing ring 1 is connected to the inner wall of the connecting cylinder 3, the outer sealing ring 2 is connected to the outer wall of the connecting cylinder 3, an extension cylinder 4 is sleeved on the surface of the connecting cylinder 3, a protruding thread 5 is connected to the surface of the connecting cylinder 3, a concave thread 6 is provided on the inner wall of the extension cylinder 4, a spring strip 7 is connected inside the connecting cylinder 3, a limit block 8 is connected to the end of the spring strip 7, a column 9 is connected to the side of the limit block 8 away from the spring strip 7, and an arc-shaped end cap 10 is connected to the end of the column 9 away from the limit block 8.

[0024] Preferably, the extension cylinder 4 is symmetrically arranged at both ends of the connecting cylinder 3, and both the connecting cylinder 3 and the extension cylinder 4 are made of nitrile rubber (NBR).

[0025] In practical use, by adjusting the position of the extension tube 4 on the connecting tube 3, it is possible to easily adapt to outer sealing rings 2 of different widths.

[0026] Preferably, the extension cylinder 4 is threadedly connected to the concave thread 6 and the convex thread 5.

[0027] In practical use, when the extension cylinder 4 rotates, it can be driven to move longitudinally on the surface of the connecting cylinder 3 through the threaded connection between the concave thread 6 and the convex thread 5.

[0028] Preferably, the spring bar 7, the limiting block 8, the column 9, and the arc-shaped end cap 10 are arranged in a circular array with the center line of the connecting cylinder 3 as the center.

[0029] Preferably, the limiting block 8 and the spring strip 7 form an elastic telescopic structure.

[0030] Preferably, the limiting block 8 and the column 9 are integrated into one structure, and the arc-shaped end cap 10 is made of fluororubber FKM material.

[0031] In practical use, the spring bar 7 can drive the limit block 8, the column 9 and the arc end cap 10 to reset through its own elasticity, which can improve the rebound effect of the outer sealing ring 2.

[0032] The working principle of this utility model in specific use is as follows: When the extension cylinder 4 rotates, it can move longitudinally through the threaded connection between the convex thread 5 and the concave thread 6, which can adjust the distance between the two extension cylinders 4. This allows the groove formed between the two extension cylinders 4 and the connecting cylinder 3 to use outer sealing rings 2 of different widths. When the outer sealing ring 2 is compressed, it can compress the arc-shaped end cap 10, which in turn compresses the column 9, which in turn compresses the limiting block 8, which in turn compresses the spring strip 7. After the force disappears, the spring strip 7 can use its own elasticity to push the limiting block 8 back to its original position. After the limiting block 8 returns to its original position, the column 9 can drive the arc-shaped end cap 10 to return to its original position. The return of the arc-shaped end cap 10 can then compress the outer sealing ring 2 to return to its original position, thus improving the rebound effect of the outer sealing ring 2.

[0033] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A combined structure of hydraulic cylinder sealing ring, comprising an inner sealing ring (1), an outer sealing ring (2) and a connecting cylinder (3), characterized in that: The inner wall of the connecting cylinder (3) is connected with an inner sealing ring (1), the outer wall of the connecting cylinder (3) is connected with an outer sealing ring (2), the surface of the connecting cylinder (3) is sleeved with an extending cylinder (4), the surface of the connecting cylinder (3) is connected with a convex thread (5), the inner wall of the extending cylinder (4) is provided with a concave thread (6), the inside of the connecting cylinder (3) is connected with a spring strip (7), the end of the spring strip (7) is connected with a limiting block (8), the side, away from the spring strip (7), of the limiting block (8) is connected with a stand (9), and the end, away from the limiting block (8), of the stand (9) is connected with an arc end cap (10).

2. The hydraulic cylinder seal ring of combined construction according to claim 1, characterized in that: The extending cylinder (4) is symmetrically arranged at both ends of the connecting cylinder (3), and the connecting cylinder (3) and the extending cylinder (4) are both made of nitrile rubber NBR material.

3. The hydraulic cylinder seal ring of claim 1, wherein: The extending cylinder (4) is threadedly connected through the concave thread (6) and the convex thread (5).

4. The hydraulic cylinder seal ring of claim 1, wherein: The spring strip (7), the limiting block (8), the stand (9) and the arc end cap (10) are arranged in a ring array with the center line of the connecting cylinder (3) as the center.

5. The hydraulic cylinder seal ring of claim 4, wherein: The limiting block (8) and the spring strip (7) form an elastic expansion structure.

6. The hydraulic cylinder seal ring of claim 5, wherein: The limiting block (8) and the stand (9) are an integral structure, and the arc end cap (10) is made of fluorine rubber FKM material.

Images