CN221742930U - High leakproofness pneumatic cylinder - Google Patents
High leakproofness pneumatic cylinder Download PDFInfo
- Publication number
- CN221742930U CN221742930U CN202323641742.6U CN202323641742U CN221742930U CN 221742930 U CN221742930 U CN 221742930U CN 202323641742 U CN202323641742 U CN 202323641742U CN 221742930 U CN221742930 U CN 221742930U
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- end cover
- cylinder barrel
- inner cylinder
- ring
- rear end
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- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000003921 oil Substances 0.000 claims description 11
- 239000010727 cylinder oil Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a high-tightness hydraulic cylinder which comprises an inner cylinder barrel, an outer cylinder barrel and a piston rod, wherein front end covers and rear end covers are arranged on two sides of the inner cylinder barrel and the outer cylinder barrel; a groove is arranged at the center of the front end cover, a through hole connected with the inner cavity of the inner cylinder barrel is arranged at the center of the groove, and a cartridge valve is arranged in the through hole; an inner cylinder barrel oil duct is arranged at the intersection of the inner cylinder barrel and the inner side surface of the rear end cover; an annular supporting plate is arranged in a cavity between the inner cylinder barrel and the outer cylinder barrel, and rubber layers are arranged on the inner diameter surface and the outer diameter surface of the annular supporting plate; the piston rod is arranged in the inner cylinder barrel, one end of the piston rod near the front end cover is provided with a piston, the center of the rear end cover is provided with a through hole the inner diameter surface is abutted against the piston rod; the outer vertical surface of the piston and the inner diameter surface of the rear end cover are respectively provided with a plurality of groups of sealing rubber. The utility model has novel structure, optimizes the sealing structure between the inner cylinder barrel, the outer cylinder barrel, the piston and the inner cylinder barrel, the rear end cover and the piston rod and between the oil ducts of the inner cylinder barrel, greatly improves the sealing performance and avoids the leakage risk.
Description
Technical Field
The utility model relates to the field of oil cylinders, in particular to a high-tightness hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic executive component capable of converting hydraulic energy into mechanical energy, the hydraulic cylinder can realize linear reciprocating motion, the hydraulic cylinder is widely used in various mechanical hydraulic systems nowadays,
The sealing mechanism adopted is different because the types of the sealing rings in the hydraulic oil cylinders are different, wherein most of the adopted O-shaped sealing rings mainly rely on precompression to offset the gap to realize the sealing effect, and the O-shaped sealing rings have simple structure and poor sealing performance; y, V shape relies on the lip of sealing washer to receive hydraulic pressure effect deformation, makes the lip paste closely the front cover and seals, and Y, V shape compression back elasticity is insufficient still can appear leaking oil phenomenon.
Disclosure of utility model
The utility model aims to provide a high-tightness hydraulic cylinder which is not easy to leak.
The purpose of the utility model is realized in the following way: the high-tightness hydraulic cylinder comprises an inner cylinder barrel, an outer cylinder barrel and a piston rod, wherein the inner cylinder barrel and the outer cylinder barrel are of barrel structures with two open ends, and a front end cover and a rear end cover are arranged on two sides of the inner cylinder barrel and the outer cylinder barrel; a groove is formed in the center of the front end cover, a through hole connected with the inner cavity of the inner cylinder barrel is formed in the center of the groove, and a cartridge valve is arranged in the through hole; the front end cover is provided with a connecting block and a pressure measuring joint, and the connecting block is provided with a male joint and a female joint; an inner cylinder oil duct is arranged at the intersection of the inner cylinder and the inner side surface of the rear end cover; an annular supporting plate is arranged in a cavity between the inner cylinder and the outer cylinder, and rubber layers are arranged on the inner diameter surface and the outer diameter surface of the annular supporting plate;
The piston rod is arranged in the inner cylinder barrel, a piston is arranged at one end of the piston rod, which is close to the front end cover, a through hole is arranged in the center of the rear end cover, and the inner diameter surface of the rear end cover is abutted against the piston rod; the outer vertical surface of the piston is provided with a support ring, a Style seal, a support ring and a combined seal ring from left to right in sequence, and the inner diameter surface of the rear end cover is provided with the combined seal ring, the Style seal, the support ring and a dust ring from left to right in sequence.
Preferably, the combined sealing ring comprises an inner O-shaped ring, a concave rubber ring and an outer star-shaped rubber ring, and a rebound O-shaped ring is arranged between the concave rubber ring and the outer star-shaped rubber ring.
Preferably, the front end cover is provided with an inner step and an outer step, the inner step is used for fixing the inner cylinder barrel, and the outer step is used for fixing the outer cylinder barrel; the inner cylinder is provided with an internal thread on one side close to the rear end cover, an external thread is arranged on the outer vertical surface of the rear end cover, and the rear end cover is connected with the inner cylinder through threads.
Preferably, the inner side surface of the annular supporting plate is abutted against the raised ring, the raised ring and the outer cylinder are integrally constructed, and a return spring is arranged between the annular supporting plate and the rear end cover.
Preferably, the inner cylinder oil duct extends to the outside of the outer cylinder through a connecting pipeline; the outer periphery of the oil duct of the inner cylinder is provided with a fixed wall, the connecting section of the connecting pipeline is provided with a fixed cap, and a rubber gasket which is in contact with the wall opening of the fixed wall is arranged inside the fixed cap.
Preferably, a plurality of groups of sealing rings are arranged on the periphery of the cartridge valve main body.
Compared with the prior art, the utility model has the following advantages:
1. The inner diameter surfaces of the piston and the rear end cover are provided with a combined sealing ring, an outer star-shaped sealing rubber ring and a rebound O-shaped ring are additionally arranged through improvement of the combined sealing ring, and the outer star-shaped sealing rubber ring can be matched with the concave rubber ring to form multiple seals with the inner wall of the inner cylinder; the rebound O-shaped ring can support the outer star-shaped sealing rubber ring, so that the collapse of the outer star-shaped sealing rubber ring is avoided, and the tightness is further improved;
2. Be equipped with annular support plate in the cavity between interior cylinder and outer cylinder, and be equipped with the rubber layer at annular support plate inside diameter face and external diameter face for can support between interior cylinder and the outer cylinder, avoid rocking of interior cylinder and outer cylinder, the leakproofness between interior cylinder and the outer cylinder can be strengthened to the rubber layer that the backup pad set up simultaneously, thereby realize whole leakproofness's improvement, avoid interior cylinder hydraulic oil to leak the back, hydraulic oil flows from the rear end cap region between interior cylinder and the outer cylinder, guarantee the security of use.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a schematic structural view of the combined seal ring of the present utility model.
Fig. 3 is a schematic structural view of the annular support plate of the present utility model.
FIG. 4 shows an oil passage of an inner cylinder tube of the present utility model
The cylinder comprises a cylinder barrel 1, a fixed wall 101, an outer cylinder 2, a protruding ring 201, a piston rod 3, a front end cover 4, a groove 401, a through hole 402, an inner step 403, an outer step 404, a rear end cover 5, a cartridge valve 6, a connecting block 7, a pressure measuring joint 8, a male and female joint 9, an oil duct of the cylinder barrel 10, an annular supporting plate 11, a rubber layer 1101, a piston 12, a supporting ring 13, a 14 Style seal 15, a combined sealing ring 1501O-shaped ring, a concave rubber ring 1502, a star-shaped rubber ring 1503, a rebound O-shaped ring 1504, a dust ring 16, a return spring 17, a connecting pipe 18 and a rubber gasket 19.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
It should be noted that, in the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or communicating between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-4, the high-tightness hydraulic cylinder comprises an inner cylinder barrel 1, an outer cylinder barrel 2 and a piston rod 3, wherein the inner cylinder barrel 1 and the outer cylinder barrel 2 are of cylinder body structures with two open ends, a front end cover 4 and a rear end cover 5 are arranged on two sides of the inner cylinder barrel 1 and the outer cylinder barrel 2, and the inner cylinder barrel and the outer cylinder barrel are not connected through a connecting plate, so that independent replacement can be realized, and the whole replacement due to damage of one cylinder barrel is not needed; a groove 401 is arranged at the center of the front end cover 4, a through hole 402 connected with the inner cavity of the inner cylinder barrel 1 is arranged at the center of the groove 401, and a cartridge valve 6 is arranged in the through hole 402; the front end cover 4 is provided with a connecting block 7 and a pressure measuring joint 8, and the connecting block 7 is provided with a male-female joint 9; an inner cylinder oil duct 10 is arranged at the intersection of the inner cylinder 1 and the inner side surface of the rear end cover 5; an annular supporting plate 11 is arranged in a cavity between the inner cylinder barrel 1 and the outer cylinder barrel 2, and rubber layers 1101 are arranged on the inner diameter surface and the outer diameter surface of the annular supporting plate 11;
The piston rod 3 is arranged in the inner cylinder barrel 1, a piston 12 is arranged at one end of the piston rod 3 close to the front end cover 4, a through hole is arranged in the center of the rear end cover 5, and the inner diameter surface is abutted against the piston rod 3; the outer vertical surface of the piston 3 is provided with a support ring 13, a Style seal 14, a support ring 13 and a combined sealing ring 15 in sequence from left to right, the inner diameter surface of the rear end cover is provided with the combined sealing ring 15, the Style seal 14, the support ring 13 and a dust-proof ring 16 in sequence from left to right, the combined sealing ring is used for enhancing the tightness, and the dust-proof ring is used for preventing external dust from entering.
As shown in fig. 2, the combined sealing ring 15 comprises an inner O-ring 1501, a concave rubber ring 1502 and an outer star rubber ring 1503, and a rebound O-ring 1504 is arranged between the concave rubber ring 1502 and the outer star rubber ring 1503; the outer star-shaped sealing rubber ring can be matched with the concave rubber ring, and can form multiple seals with the inner wall of the inner cylinder; and meanwhile, the rebound O-shaped ring can support the outer star-shaped sealing rubber ring, so that the collapse of the outer star-shaped sealing rubber ring is avoided.
As shown in fig. 1, the front end cover 4 is provided with an inner step 403 and an outer step 404, the inner step 403 is used for fixing the inner cylinder 1, and the outer step 404 is used for fixing the outer cylinder 2; the inner cylinder barrel 1 is provided with an internal thread on one side close to the rear end cover 5, an external thread is arranged on the outer vertical surface of the rear end cover 5, the rear end cover 5 is connected with the inner cylinder barrel 1 through threads, and the rear end cover is rotationally connected and then is secondarily fixed through bolts.
As shown in fig. 3, the inner side surface of the annular supporting plate 11 is abutted against the raised ring 201, the raised ring 201 and the outer cylinder 2 are integrally constructed, a return spring 17 is arranged between the annular supporting plate 11 and the rear end cover 5, and the annular supporting plate can provide both support and tightness between the inner cylinder and the outer cylinder.
As shown in fig. 4, the gas passage of the inner cylinder 1 extends to the outside of the outer cylinder 1 through a connecting pipe 15, from which hydraulic oil flows out; meanwhile, the joint of the connecting pipeline, the inner cylinder barrel and the outer cylinder barrel is required to be sealed, a fixed wall 202 is arranged at the periphery of an oil passage of the inner cylinder barrel, a fixed cap 1801 is arranged at the connecting section of the connecting pipeline 18, and a rubber gasket 19 which is in contact with the wall opening of the fixed wall 202 is arranged inside the fixed cap 1801; after the rotary fixing cap is connected with the fixing wall, the rubber gasket deforms to complete the sealing between the connecting pipeline and the fixing wall.
As shown in fig. 1, the periphery of the main body of the cartridge valve 6 is provided with a plurality of groups of sealing rings for enhancing the tightness between the cartridge valve and the through hole and avoiding the leakage of hydraulic oil.
The working principle of the utility model is explained as follows: after the whole hydraulic cylinder is assembled, the cartridge valve is filled with oil, and the piston rod extends out; the oil channel of the inner cylinder tube is used for oil feeding, and the piston rod is retracted; the outer star-shaped sealing rubber ring and the rebound O-shaped ring can be matched with the middle concave rubber ring, and meanwhile the rebound O-shaped ring can support the outer star-shaped sealing rubber ring, so that the collapse of the outer star-shaped sealing rubber ring is avoided, and the tightness is further improved.
The above examples are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the spirit and scope of the present utility model. Various modifications and improvements of the technical scheme of the present utility model will fall within the protection scope of the present utility model without departing from the design concept of the present utility model, and the technical content of the present utility model is fully described in the claims.
Claims (6)
1. The high-tightness hydraulic cylinder is characterized by comprising an inner cylinder barrel, an outer cylinder barrel and a piston rod, wherein the inner cylinder barrel and the outer cylinder barrel are of barrel structures with two open ends, and a front end cover and a rear end cover are arranged on two sides of the inner cylinder barrel and the outer cylinder barrel; a groove is formed in the center of the front end cover, a through hole connected with the inner cavity of the inner cylinder barrel is formed in the center of the groove, and a cartridge valve is arranged in the through hole; the front end cover is provided with a connecting block and a pressure measuring joint, and the connecting block is provided with a male joint and a female joint; an inner cylinder oil duct is arranged at the intersection of the inner cylinder and the inner side surface of the rear end cover; an annular supporting plate is arranged in a cavity between the inner cylinder and the outer cylinder, and rubber layers are arranged on the inner diameter surface and the outer diameter surface of the annular supporting plate;
The piston rod is arranged in the inner cylinder barrel, a piston is arranged at one end of the piston rod, which is close to the front end cover, a through hole is arranged in the center of the rear end cover, and the inner diameter surface of the rear end cover is abutted against the piston rod; the outer vertical surface of the piston is provided with a support ring, a Style seal, a support ring and a combined seal ring from left to right in sequence, and the inner diameter surface of the rear end cover is provided with the combined seal ring, the Style seal, the support ring and a dust ring from left to right in sequence.
2. The high-tightness hydraulic cylinder according to claim 1, wherein the combined sealing ring comprises an inner O-shaped ring, a middle concave rubber ring and an outer star-shaped rubber ring, and a rebound O-shaped ring is arranged between the middle concave rubber ring and the outer star-shaped rubber ring.
3. The high-tightness hydraulic cylinder according to claim 1, wherein the front end cover is provided with an inner step and an outer step, the inner step is used for fixing the inner cylinder barrel, and the outer step is used for fixing the outer cylinder barrel; the inner cylinder is provided with an internal thread on one side close to the rear end cover, an external thread is arranged on the outer vertical surface of the rear end cover, and the rear end cover is connected with the inner cylinder through threads.
4. The high-tightness hydraulic cylinder according to claim 1, wherein the inner side surface of the annular supporting plate is abutted against the raised ring, the raised ring and the outer cylinder are integrally constructed, and a return spring is arranged between the annular supporting plate and the rear end cover.
5. The high tightness hydraulic cylinder according to claim 1, wherein said inner cylinder tube oil passage extends to the outside of said outer cylinder tube through a connecting pipe; the outer periphery of the oil duct of the inner cylinder is provided with a fixed wall, the connecting section of the connecting pipeline is provided with a fixed cap, and a rubber gasket which is in contact with the wall opening of the fixed wall is arranged inside the fixed cap.
6. The high tightness hydraulic cylinder according to claim 1, wherein a plurality of groups of sealing rings are arranged on the periphery of the cartridge valve main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323641742.6U CN221742930U (en) | 2023-12-28 | 2023-12-28 | High leakproofness pneumatic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323641742.6U CN221742930U (en) | 2023-12-28 | 2023-12-28 | High leakproofness pneumatic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221742930U true CN221742930U (en) | 2024-09-20 |
Family
ID=92735222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323641742.6U Active CN221742930U (en) | 2023-12-28 | 2023-12-28 | High leakproofness pneumatic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221742930U (en) |
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2023
- 2023-12-28 CN CN202323641742.6U patent/CN221742930U/en active Active
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