CN219692245U - Combined piston - Google Patents
Combined piston Download PDFInfo
- Publication number
- CN219692245U CN219692245U CN202321000578.8U CN202321000578U CN219692245U CN 219692245 U CN219692245 U CN 219692245U CN 202321000578 U CN202321000578 U CN 202321000578U CN 219692245 U CN219692245 U CN 219692245U
- Authority
- CN
- China
- Prior art keywords
- ring
- piston
- copper
- copper ring
- sealing rings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
- Actuator (AREA)
Abstract
The utility model discloses a composite piston, which comprises a piston rod and a piston which are connected; the piston is characterized by comprising a piston ring, a copper ring fixedly connected to the middle part of the outer circle of the piston ring, and two sealing rings positioned on two sides of the copper ring, wherein the outer circle of the copper ring is provided with more than two ring grooves, supporting rings are arranged in the ring grooves, and the outer diameters of the supporting rings and the sealing rings are larger than the maximum outer diameter of the copper ring; the utility model can prevent the damage of the piston to the cylinder barrel and prolong the service life of the hydraulic cylinder.
Description
Technical Field
The utility model relates to a composite piston, in particular to a composite piston for an ultra-long stroke hydraulic cylinder.
Background
The existing hydraulic cylinder piston generally adopts a steel piston ring and supporting ring structural form for saving cost, and the ultra-long stroke hydraulic cylinder aggravates the abrasion of the supporting ring due to uneven lateral force, so that the steel piston ring contacts with the cylinder barrel to damage the cylinder barrel, and the service life of the hydraulic cylinder is influenced.
Disclosure of Invention
The utility model aims at overcoming the defects in the prior art and providing a composite piston which can prevent the damage of the piston to a cylinder barrel and prolong the service life of a hydraulic cylinder.
In order to achieve the above purpose, the utility model provides a composite piston, which comprises a piston rod and a piston which are connected; the piston is characterized by comprising a piston ring, a copper ring fixedly connected to the middle part of the outer circle of the piston ring, and two sealing rings positioned on two sides of the copper ring, wherein the outer circle of the copper ring is provided with more than two annular grooves, supporting rings are arranged in the annular grooves, and the outer diameters of the supporting rings and the sealing rings are larger than the maximum outer diameter of the copper ring.
When the hydraulic cylinder is used, after the supporting ring is worn, the copper ring welded on the surface of the steel piston ring is in contact with the cylinder barrel, the copper ring has lower hardness, the cylinder barrel can be effectively prevented from being damaged, the supporting ring can be replaced in time, and the service life of the hydraulic cylinder is prolonged;
as a further improvement of the utility model, a front check ring and a rear check ring are arranged on two sides of the two sealing rings, the rear check ring is clung to a positioning step on the piston rod, and the front check ring is connected with the piston rod through threads and is fixed through a set screw; the installation and the replacement of the sealing ring and the piston ring are convenient;
as a further improvement of the utility model, the support ring is of a hard plastic material, such as polyphenylene sulfide; the service life can be prolonged, and the support ring is convenient to replace after being worn;
in summary, the utility model can prevent the piston from damaging the cylinder barrel, and prolong the service life of the hydraulic cylinder.
Drawings
Fig. 1 is a front view of an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, a composite piston of this embodiment includes an associated piston rod 1 and piston; the piston comprises a piston ring 2, a copper ring 3 fixedly connected to the middle part of the outer circle of the piston ring 2 in a welding way, two sealing rings 4 positioned on two sides of the copper ring 3, a front check ring 5 and a rear check ring 6 positioned on two sides of the two sealing rings 4, three annular grooves are formed in the outer circle of the copper ring 3, supporting rings 7 made of hard plastic materials are arranged in the annular grooves, the rear check ring 6 clings to a positioning step on the piston rod 1, the front check ring 5 is fixedly connected with the piston rod 1 through threads and is fixed through an axial set screw 8, and the outer diameters of the supporting rings 7 and the sealing rings 4 are larger than the maximum outer diameters of the copper ring, the front check ring 5 and the rear check ring 6.
When the hydraulic cylinder is used, after the supporting ring 7 is worn, the copper ring 3 welded on the surface of the steel piston ring 2 is in contact with the cylinder barrel 9, the copper ring 3 has low hardness, the cylinder barrel 9 can be effectively prevented from being damaged, the supporting ring 7 can be replaced in time, and the service life of the hydraulic cylinder is prolonged; the front retainer ring 5 and the rear retainer ring 6 facilitate the installation and replacement of the sealing ring 4 and the piston ring 2.
Claims (3)
1. A composite piston comprises a piston rod and a piston which are connected; the piston is characterized by comprising a piston ring, a copper ring fixedly connected to the middle part of the outer circle of the piston ring, and two sealing rings positioned on two sides of the copper ring, wherein the outer circle of the copper ring is provided with more than two annular grooves, supporting rings are arranged in the annular grooves, and the outer diameters of the supporting rings and the sealing rings are larger than the maximum outer diameter of the copper ring.
2. A composite piston as claimed in claim 1, characterized in that a front retainer ring and a rear retainer ring are provided on both sides of the two sealing rings, the rear retainer ring being in close contact with a positioning step on the piston rod, the front retainer ring being in threaded connection with the piston rod and being fixed by means of a set screw.
3. A composite piston according to claim 1 or 2, wherein the support ring is of a hard plastics material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321000578.8U CN219692245U (en) | 2023-04-28 | 2023-04-28 | Combined piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321000578.8U CN219692245U (en) | 2023-04-28 | 2023-04-28 | Combined piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219692245U true CN219692245U (en) | 2023-09-15 |
Family
ID=87964767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321000578.8U Active CN219692245U (en) | 2023-04-28 | 2023-04-28 | Combined piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219692245U (en) |
-
2023
- 2023-04-28 CN CN202321000578.8U patent/CN219692245U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |