Hydraulic cylinder sealing gland with good sealing performance

Abstract

The utility model discloses a hydraulic cylinder sealing gland with good sealing performance, which belongs to the technical field of hydraulic cylinders, and comprises a sealing gland and a hydraulic cylinder shell, the outer wall of the sealing gland is provided with a dual-sealing assembly, the dual-sealing assembly is provided with a buckle sealing assembly, the buckle sealing assembly comprises a first sealing plate, and the first sealing plate is provided with a second sealing plate. A mounting groove is formed in the side wall of the first sealing plate, a telescopic rod is fixedly mounted on the inner wall of the mounting groove, a fixing block is fixedly mounted at the other end of the telescopic rod, and the outer wall of the telescopic rod is sleeved with a spring; according to the hydraulic cylinder, through the arrangement of the buckle sealing assembly and the design, the sealing sleeve is effectively embedded into the inner wall of the shell of the hydraulic cylinder, the sealing performance of the hydraulic cylinder is greatly enhanced, the phenomenon that hydraulic oil leaks outwards in the working process of the hydraulic cylinder is avoided, and the use effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a sealing gland of a hydraulic cylinder with good sealing performance. Background Art

[0002] A hydraulic cylinder is a basic mechanical device that can convert hydraulic energy into mechanical energy and is a hydraulic actuator that makes linear reciprocating motion. A hydraulic cylinder can be divided into a cylinder barrel, a cylinder head, a piston, etc., and has the characteristics of simple structure and reliable operation.

[0003] At present, the hydraulic cylinder needs to be in a sealed state so that it can generate hydraulic energy during operation. Most of the sealing glands on the hydraulic cylinders are only provided with sealing rings for sealing, and the sealing method is relatively simple, which easily leads to the leakage of hydraulic oil during the operation of the hydraulic cylinder, greatly reducing the sealing performance of the hydraulic cylinder and having a poor use effect. To solve the above problems, there is an urgent need for a sealing gland of a hydraulic cylinder with good sealing performance to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that at present, the hydraulic cylinder needs to be in a sealed state so that it can generate hydraulic energy during operation. Most of the sealing glands on the hydraulic cylinders are only provided with sealing rings for sealing, and the sealing method is relatively simple, which easily leads to the leakage of hydraulic oil during the operation of the hydraulic cylinder, greatly reducing the sealing performance of the hydraulic cylinder and having a poor use effect, and to propose a sealing gland of a hydraulic cylinder with good sealing performance.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a sealing gland of a hydraulic cylinder with good sealing performance, including a sealing gland and a hydraulic cylinder housing. A double-sealing component is arranged on the outer wall of the sealing gland, and a snap-sealing component is arranged on the double-sealing component;

[0006] The snap-sealing component includes a first sealing plate. An installation groove is arranged on the side wall of the first sealing plate, and a telescopic rod is fixedly installed on the inner wall of the installation groove. The other end of the telescopic rod is fixedly installed with a fixed block.

[0007] As a further description of the above technical scheme:

[0008] A spring is sleeved on the outer wall of the telescopic rod, and one end of the spring is fixedly installed on the inner wall of the installation groove.

[0009] As a further description of the above technical scheme:

[0010] The other end of the spring is fixedly installed on the side wall of the fixed block, and a sealing sleeve is sleeved on the outer wall of the fixed block.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the sealing sleeve is fixedly connected to the side wall of the first sealing plate, and a sealing groove is provided on the inner wall of the hydraulic cylinder housing.

[0013] As a further description of the above technical solution:

[0014] The double-sealing assembly includes a second sealing plate, the second sealing plate is fixedly installed on the outer wall of the sealing gland, and a sealing ring is fixedly installed on the side wall of the second sealing plate.

[0015] As a further description of the above technical solution:

[0016] A connecting rod is fixedly installed on the outer wall of the second sealing plate, and the other end of the connecting rod is fixedly installed on the outer wall of the first sealing plate.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0018] 1. In the present utility model, by providing a snap-sealing assembly, the sealing gland is aligned with one end of the hydraulic cylinder housing, and the first sealing plate is inserted into the interior of the hydraulic cylinder housing. The sealing sleeve sleeved on the side wall of the first sealing plate is squeezed by the inner wall of the hydraulic cylinder housing and contracts. At the same time, it also squeezes the fixed block. After being squeezed, the fixed block retracts into the installation groove provided on the side wall of the first sealing plate. The fixed block simultaneously squeezes the spring to form a compressed state, and the telescopic rod contracts synchronously. By pushing the sealing gland, it drives the first sealing plate to move inward through the second sealing plate and the connecting rod. The first sealing plate drives parts such as the fixed block and the sealing sleeve to first move inward into the hydraulic cylinder housing. When the fixed block and the sealing sleeve coincide with the sealing groove provided on the inner wall of the hydraulic cylinder housing, the fixed block is reset by the elastic force generated by the spring, and it drives the sealing sleeve to insert into the sealing groove. The inner wall of the sealing groove is closely attached to the sealing sleeve sleeved on the fixed block. Through this design, the sealing sleeve is effectively embedded into the inner wall of the hydraulic cylinder housing, greatly enhancing the sealing performance of the hydraulic cylinder and avoiding the leakage of hydraulic oil during the operation of the hydraulic cylinder. The use effect is good.

[0019] 2. In the present utility model, by providing a double-sealing assembly, when the sealing gland is pushed into the interior of the hydraulic cylinder housing, the sealing gland will drive the second sealing plate, which in turn will drive the sealing ring to be pushed. The sealing ring will be squeezed by the inner wall of the hydraulic cylinder housing. The sealing ring has a certain elasticity and will deform when being squeezed. When the sealing ring is formed, it will generate an elastic force, and this elastic force will cause the sealing ring to squeeze the inner wall of the hydraulic cylinder housing, so that the gap between the second sealing plate and the inner wall of the hydraulic cylinder housing is sealed by the sealing ring. Through this design, the double-sealing of the hydraulic cylinder is effectively realized, further improving the sealing performance of the hydraulic cylinder, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a three-dimensional structural schematic diagram of a sealing gland of a hydraulic cylinder with good sealing performance.

[0021] Figure 2 FIG. is an exploded three-dimensional structural schematic diagram of a sealing gland of a hydraulic cylinder with good sealing performance.

[0022] Figure 3 FIG. is a separated three-dimensional structural schematic diagram of a snap-fastening sealing assembly in a sealing gland of a hydraulic cylinder with good sealing performance.

[0023] Figure 4 FIG. is an exploded three-dimensional structural schematic diagram of a snap-fastening sealing assembly in a sealing gland of a hydraulic cylinder with good sealing performance.

[0024] Figure 5 FIG. is an enlarged structural schematic diagram of part A in a sealing gland of a hydraulic cylinder with good sealing performance.

[0025] LEGEND DESCRIPTION:

[0026] 1. Sealing gland; 2. Hydraulic cylinder housing; 3. Snap-fastening sealing assembly; 31. Sealing groove; 32. First sealing plate; 33. Installation groove; 34. Sealing sleeve; 35. Fixed block; 36. Telescopic rod; 37. Spring; 4. Double-sealing assembly; 41. Connecting rod; 42. Second sealing plate; 43. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 - 5, the present utility model provides a technical solution: a sealing gland for a hydraulic cylinder with good sealing performance, including a sealing gland 1 and a hydraulic cylinder housing 2. A double-sealing assembly 4 is arranged on the outer wall of the sealing gland 1, and a snap-sealing assembly 3 is arranged on the double-sealing assembly 4;

[0029] The snap-sealing assembly 3 includes a first sealing plate 32. An installation groove 33 is arranged on the side wall of the first sealing plate 32. A telescopic rod 36 is fixedly installed on the inner wall of the installation groove 33, and the other end of the telescopic rod 36 is fixedly installed with a fixed block 35;

[0030] A spring 37 is sleeved on the outer wall of the telescopic rod 36. One end of the spring 37 is fixedly installed on the inner wall of the installation groove 33, and the other end of the spring 37 is fixedly installed on the side wall of the fixed block 35. A sealing sleeve 34 is sleeved on the outer wall of the fixed block 35. A fixed connection is arranged between the outer wall of the sealing sleeve 34 and the side wall of the first sealing plate 32. A sealing groove 31 is arranged on the inner wall of the hydraulic cylinder housing 2;

[0031] The specific implementation method is as follows: Align the sealing gland 1 with one end of the hydraulic cylinder housing 2, insert the first sealing plate 32 into the interior of the hydraulic cylinder housing 2. The sealing sleeve 34 sleeved on the side wall of the first sealing plate 32 is squeezed and contracted by the inner wall of the hydraulic cylinder housing 2. At the same time, it also squeezes the fixed block 35. After being squeezed, the fixed block 35 retracts into the interior of the installation groove 33 arranged on the side wall of the first sealing plate 32. The fixed block 35 simultaneously squeezes the spring 37 to make it in a compressed state, and the telescopic rod 36 contracts synchronously. By pushing the sealing gland 1, it will drive the first sealing plate 32 to push inward through the second sealing plate 42 and the connecting rod 41. The first sealing plate 32 drives parts such as the fixed block 35 and the sealing sleeve 34 to push inward into the hydraulic cylinder housing 2 first. When the fixed block 35 and the sealing sleeve 34 coincide with the sealing groove 31 arranged on the inner wall of the hydraulic cylinder housing 2, the fixed block 35 is reset by the elastic force generated by the spring 37, which drives the sealing sleeve 34 to insert into the sealing groove 31. The inner wall of the sealing groove 31 is closely attached to the sealing sleeve 34 sleeved on the fixed block 35.

[0032] The double-sealing assembly 4 includes a second sealing plate 42. The second sealing plate 42 is fixedly installed on the outer wall of the sealing gland 1. A sealing ring 43 is fixedly installed on the side wall of the second sealing plate 42. A connecting rod 41 is fixedly installed on the outer wall of the second sealing plate 42, and the other end of the connecting rod 41 is fixedly installed on the outer wall of the first sealing plate 32;

[0033] The specific implementation method is as follows: When the sealing gland 1 is pushed into the interior of the hydraulic cylinder housing 2, the sealing gland 1 will drive the second sealing plate 42, which will in turn drive the sealing ring 43. The sealing ring 43 will be squeezed by the inner wall of the hydraulic cylinder housing 2. The sealing ring 43 has a certain elasticity and will deform when squeezed. When the sealing ring 43 is formed, it will generate an elastic force, and this elastic force will cause the sealing ring 43 to squeeze the inner wall of the hydraulic cylinder housing 2, so that the gap between the second sealing plate 42 and the inner wall of the hydraulic cylinder housing 2 is sealed by the sealing ring 43.

[0034] Working principle: Align the sealing gland 1 with one end of the hydraulic cylinder housing 2, and insert the first sealing plate 32 into the interior of the hydraulic cylinder housing 2. The sealing sleeve 34 sleeved on the side wall of the first sealing plate 32 will contract under the extrusion of the inner wall of the hydraulic cylinder housing 2. At the same time, it will also squeeze the fixing block 35. After being squeezed, the fixing block 35 will retract into the installation groove 33 provided on the side wall of the first sealing plate 32. The fixing block 35 will simultaneously squeeze the spring 37, causing it to be in a compressed state, and the telescopic rod 36 will contract synchronously. By pushing the sealing gland 1, it will drive the first sealing plate 32 to move inward through the second sealing plate 42 and the connecting rod 41. The first sealing plate 32 will drive parts such as the fixing block 35 and the sealing sleeve 34 to move into the interior of the hydraulic cylinder housing 2 first. When the fixing block 35 and the sealing sleeve 34 coincide with the sealing groove 31 provided on the inner wall of the hydraulic cylinder housing 2, the fixing block 35 will reset due to the elastic force generated by the spring 37, driving the sealing sleeve 34 to insert into the sealing groove 31. The inner wall of the sealing groove 31 will closely fit with the sealing sleeve 34 sleeved on the fixing block 35. When the sealing gland 1 is pushed into the interior of the hydraulic cylinder housing 2, the sealing gland 1 will drive the second sealing plate 42, which will in turn drive the sealing ring 43. The sealing ring 43 will be squeezed by the inner wall of the hydraulic cylinder housing 2. The sealing ring 43 has a certain elasticity and will deform when squeezed. When the sealing ring 43 is formed, it will generate an elastic force, and this elastic force will cause the sealing ring 43 to squeeze the inner wall of the hydraulic cylinder housing 2, so that the gap between the second sealing plate 42 and the inner wall of the hydraulic cylinder housing 2 is sealed by the sealing ring 43.

[0035] The above is only the preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A sealing gland for a hydraulic cylinder with good sealing performance, comprising a sealing gland (1) and a hydraulic cylinder housing (2), characterized in that: A double-sealing assembly (4) is provided on the outer wall of the sealing gland (1), and a snap-sealing assembly (3) is provided on the double-sealing assembly (4); The snap-sealing assembly (3) includes a first sealing plate (32), an installation groove (33) is provided on the side wall of the first sealing plate (32), a telescopic rod (36) is fixedly installed on the inner wall of the installation groove (33), and the other end of the telescopic rod (36) is fixedly installed with a fixed block (35).

2. The sealing gland of a hydraulic cylinder with good sealing performance according to claim 1, characterized in that, A spring (37) is sleeved on the outer wall of the telescopic rod (36), and one end of the spring (37) is fixedly installed on the inner wall of the installation groove (33).

3. The sealing gland of a hydraulic cylinder with good sealing performance according to claim 2, characterized in that, The other end of the spring (37) is fixedly installed on the side wall of the fixed block (35), and a sealing sleeve (34) is sleeved on the outer wall of the fixed block (35).

4. A sealing gland for a hydraulic cylinder with good sealing performance according to claim 3, characterized in that, A fixed connection is provided between the outer wall of the sealing sleeve (34) and the side wall of the first sealing plate (32), and a sealing groove (31) is provided on the inner wall of the hydraulic cylinder housing (2).

5. A sealing gland for a hydraulic cylinder with good sealing performance according to claim 4, characterized in that, The double-sealing assembly (4) includes a second sealing plate (42), the second sealing plate (42) is fixedly installed on the outer wall of the sealing gland (1), and a sealing ring (43) is fixedly installed on the side wall of the second sealing plate (42).

6. The sealing gland of a hydraulic cylinder with good sealing performance according to claim 5, characterized in that, A connecting rod (41) is fixedly installed on the outer wall of the second sealing plate (42), and the other end of the connecting rod (41) is fixedly installed on the outer wall of the first sealing plate (32).

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