CN202579451U - Long-stroke oil cylinder - Google Patents
Long-stroke oil cylinder Download PDFInfo
- Publication number
- CN202579451U CN202579451U CN 201220218694 CN201220218694U CN202579451U CN 202579451 U CN202579451 U CN 202579451U CN 201220218694 CN201220218694 CN 201220218694 CN 201220218694 U CN201220218694 U CN 201220218694U CN 202579451 U CN202579451 U CN 202579451U
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- China
- Prior art keywords
- rings
- piston
- supporting
- ring
- shaped
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a long-stroke oil cylinder, relating to the field of oil cylinder structures. The long-stroke oil cylinder comprises a cylinder barrel, wherein the cylinder barrel is internally provided with a piston; the piston is provided with two U-shaped ring troughs and two first support ring grooves in the radial direction; each U-shaped ring trough is internally provided with a retainer ring and a U-shaped ring; the first support ring grooves are internally provided with two first support rings; the two retainer rings, the two U-shaped rings and the first support rings are arranged between the cylinder barrel and the piston respectively; the two retainer rings are arranged between the two U-shaped rings; the two first support rings are arranged in the first support ring grooves correspondingly respectively; and the two U-shaped rings are arranged between the two first support rings. The support rings are arranged on the outer side of a seal ring, thus increasing the support width of the piston, and ensuring that the sealing clearance of the seal ring is not affected by the flexure of a piston rod; and the support rings are made of a cloth-reinforced phenolic resin material, thus improving the bearing capacity of the support rings, enlarging the space between the piston and a cylinder body, reducing the running resistance of the oil cylinder, and ensuring stable operation for the oil cylinder.
Description
Technical field
The utility model relates to the structure field of oil cylinder.
Background technique
Existing structure generally is arranged in twice U-shaped circle the outside of supporting ring, because the piston deflection, produces very easily that oil cylinder is creeped and the one-sided wearing and tearing aggravation of Sealing when oil cylinder stretches out during work, has shortened the working life of oil cylinder.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, a kind of long stroke oil cylinder that oil cylinder is creeped and reduced sealing part abrasion that overcomes to be provided.
The purpose of the utility model is achieved in that a kind of long stroke oil cylinder, comprises cylinder barrel, and piston is set in the cylinder barrel; The U-shaped circle groove and the first supporting annular groove radially are set on the piston, and U-shaped circle groove is twice, in the per pass U-shaped circle groove back-up ring and U-shaped circle is set respectively; In the first supporting annular groove first supporting ring is set, two back-up rings, two U-shaped circles, first supporting rings are provided with respectively between cylinder barrel and the piston, and two back-up rings are arranged between two U-shaped circles; The said first supporting annular groove is twice; First supporting ring is two, and two first supporting rings are separately positioned in the corresponding first supporting annular groove, and two U-shaped circles are arranged between two first supporting rings.
The U-shaped circle dorsal part of the utility model is provided with back-up ring, guarantees that the U-shaped circle is not squeezed in the gap between cylinder barrel and the piston; And supporting ring is arranged in the seal ring outside; The supporting width of oversize piston, the seal clearance of assurance seal ring do not receive the influence of piston rod deflection, supporting ring material to select phenolic aldehyde folder cloth material for use; Improve the bearing value of supporting ring; Gap between oversize piston and the cylinder body reduces the oil cylinder running resistance, realizes the oil cylinder smooth running.
In order to reduce the vibration in the piston running; The twice second supporting annular groove also radially is set on the piston; In the per pass second supporting annular groove second supporting ring is set respectively, each second supporting ring is provided with respectively between cylinder barrel and the piston, and two first supporting rings are arranged between two second supporting rings.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model.
Among the figure, 1, cylinder barrel, 2, back-up ring, 3, the U-shaped circle, 4, first supporting ring, 5, second supporting ring, 6, piston, 7, the second supporting annular groove, 8, the first supporting annular groove, 9, U-shaped circle groove.
Embodiment
As shown in Figure 1; For long stroke oil cylinder, comprise cylinder barrel 1, piston 6 is set in the cylinder barrel 1; Twice U-shaped circle groove 9, the twice first supporting annular groove 8 and the twice second supporting annular groove 7 radially are set on the piston 6; Back-up ring 2 and U-shaped circle 3 are set respectively in the per pass U-shaped circle groove 9, phenolic aldehyde folder cloth first supporting ring 4 is set respectively in the per pass first supporting annular groove 8, in the per pass second supporting annular groove 7 PTFE second supporting ring 5 is set respectively; Two back-up rings 2, two U-shaped circles 3, two phenolic aldehyde folder cloth first supporting rings 4 and two PTFE second supporting rings 5 are provided with respectively between cylinder barrel 1 and the piston 6; Two back-up rings 2 are arranged between two U-shaped circles 3, and two U-shaped circles 3 are arranged between two phenolic aldehyde folder cloth first supporting rings 4, and two phenolic aldehyde folder cloth first supporting rings 4 are arranged between two PTFE, second supporting ring 5.
Claims (2)
1. one kind long stroke oil cylinder comprises cylinder barrel, and piston is set in the cylinder barrel; The U-shaped circle groove and the first supporting annular groove radially are set on the piston, and U-shaped circle groove is twice, in the per pass U-shaped circle groove back-up ring and U-shaped circle is set respectively; In the first supporting annular groove first supporting ring is set, two back-up rings, two U-shaped circles, first supporting rings are provided with respectively between cylinder barrel and the piston, and two back-up rings are arranged between two U-shaped circles; It is characterized in that: the said first supporting annular groove is twice; First supporting ring is two, and two first supporting rings are separately positioned in the corresponding first supporting annular groove, and two U-shaped circles are arranged between two first supporting rings.
2. long stroke oil cylinder according to claim 1; It is characterized in that: the twice second supporting annular groove also radially is set on the said piston; In the per pass second supporting annular groove second supporting ring is set respectively; Each second supporting ring is provided with respectively between cylinder barrel and the piston, and two first supporting rings are arranged between two second supporting rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218694 CN202579451U (en) | 2012-05-16 | 2012-05-16 | Long-stroke oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218694 CN202579451U (en) | 2012-05-16 | 2012-05-16 | Long-stroke oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579451U true CN202579451U (en) | 2012-12-05 |
Family
ID=47248867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220218694 Expired - Fee Related CN202579451U (en) | 2012-05-16 | 2012-05-16 | Long-stroke oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579451U (en) |
-
2012
- 2012-05-16 CN CN 201220218694 patent/CN202579451U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20180516 |