CN202149097U - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN202149097U CN202149097U CN201120242778U CN201120242778U CN202149097U CN 202149097 U CN202149097 U CN 202149097U CN 201120242778 U CN201120242778 U CN 201120242778U CN 201120242778 U CN201120242778 U CN 201120242778U CN 202149097 U CN202149097 U CN 202149097U
- Authority
- CN
- China
- Prior art keywords
- oil
- piston
- rear end
- end cover
- port seat
- 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.)
- Expired - Fee Related
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Abstract
A hydraulic cylinder relates to the technical field of hydraulic cylinders and comprises a cylinder barrel, a rear end cover, a piston, a piston rod, a front oil port seat and a rear oil port seat. A first oil hole is disposed on the rear end cover in a radial direction, a second oil hole is disposed on the rear end cover in an axial direction, a sealing element installation groove is arranged on the periphery of the piston in an radial direction, a hydraulic lock is arranged inside the rear end cover, an oil inlet of the hydraulic lock is connected to a third oil hole, the other end of the third oil hole is connected to the first oil hole, an oil outlet of the hydraulic lock is connected to the second oil hole, a control port of the hydraulic lock is connected to an oblique hole, and the rear oil port seat is connected to the other end of the oblique hole and connected to the front oil port seat through an oil pipe. A combination sealing ring which is disposed in the sealing element installation groove comprises a base body sealing ring, a star-shaped ring and two O-shaped rings, a groove is arranged on the periphery of the base body sealing ring in a radial direction, the star-shaped groove is disposed in the groove, and the two O-shaped rings are respectively arranged between the base body sealing ring and the piston. Due to the cooperation between the hydraulic lock and the combination sealing ring, the piston rod stays at one point and does not crawl.
Description
Technical field
The utility model relates to the technical field of oil hydraulic cylinder.
Background technique
Existing oil hydraulic cylinder mainly comprises cylinder barrel, rear end cover, piston, piston rod and Sealing, because Sealing unreasonable, makes the poor sealing performance of oil cylinder; Because safety valve is contained on the pumping plant, if pipe leakage of oil, quick-fried causes oil cylinder pressure most likely, the piston rod of oil cylinder can produce creeping phenomenon in addition.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, to provide a kind of piston rod to rest on the oil hydraulic cylinder of not creeping in certain.
The purpose of the utility model is achieved in that oil hydraulic cylinder, comprises cylinder barrel, rear end cover, piston, piston rod, and the front end of cylinder barrel is provided with preceding hydraulic fluid port seat; The rear end of cylinder barrel is provided with back hydraulic fluid port seat, and first oilhole that is connected with back hydraulic fluid port seat radially is set on the said rear end cover, and second oilhole that is connected with the cylinder barrel rodless cavity axially is set on the rear end cover; The outer periphery of said piston is provided with the Sealing mounting groove, in the said rear end cover hydraulic lock is set, and the filler opening of hydraulic lock connects the 3rd oilhole; The other end of the 3rd oilhole connects said first oilhole; The oil outlet of hydraulic lock connects said second oilhole, and the control mouth of hydraulic lock connects inclined hole, and inclined hole is arranged in the rear end cover; The other end of inclined hole connects back hydraulic fluid port seat, hydraulic fluid port seat before back hydraulic fluid port seat connects through oil pipe; In the said Sealing mounting groove combined seal ring is set; Combined seal ring comprises a matrix seal ring, a star circle and two O shape circles; The outer periphery of matrix seal ring is provided with groove, and the star circle is arranged in the groove, and two O shape circles are separately positioned between matrix seal ring and the piston.
The utility model is through above design; When the rodless cavity oil-feed; Hydraulic oil is from the oil outlet → second oilhole → rodless cavity of the filler opening → hydraulic lock of first oilhole → the 3rd oilhole → hydraulic lock; When piston rod need rest on certain, because hydraulic lock has the function of one-way valve, rodless cavity just can't oil return.And between piston and the cylinder barrel combined seal ring is set, in the time of in combined seal ring is installed in groove, two O shape circles will the application of force be given the matrix seal ring because be compressed, and make matrix seal ring and star circle be close to inner wall of cylinder and play sealing effect.When the working pressure of system raise, the pressure that acts on the Sealing was converted into radial pressure, and letting out almost in the system does not have.By cooperating of hydraulic lock and combined seal ring, thereby it is reliable to make that piston rod stops, and does not creep.When rodless cavity needs oil return,, hydraulic lock is opened the rodless cavity oil extraction by the control mouth of preceding hydraulic fluid port seat fuel feeding → oil pipe → back hydraulic fluid port seat → inclined hole → hydraulic lock.
Two copper bands are set between piston of the utility model and the cylinder barrel, and each copper band is welded on the periphery of piston respectively, and two copper bands are separately positioned on the both sides, front and back of combined seal ring.When the gap of piston and cylinder barrel was big, along with the increase of pressure, combined seal ring was fragile, and copper band plays a supportive role.
In order to prevent that copper band and piston are fixing not firm, the periphery of piston also is provided with the twice dovetail groove, and each copper band is separately positioned in the corresponding dovetail groove.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model.
Fig. 2 is the right elevation of Fig. 1.
Fig. 3 is an A portion enlarged view among Fig. 1.
Among the figure, 1 cylinder barrel, 2 piston rods, 3 oil pipes, 4 preceding hydraulic fluid port seats, 5 pistons; 6 first oilholes, 7 back hydraulic fluid port seats, 8 hydraulic lock, 9 rear end covers, 10 second oilholes; 11 the 3rd oilholes, 12 inclined holes, 13 combined seal rings, 13-1 star circle, 13-2 matrix seal ring; The 13-3 groove, 13-4 O shape circle, 14 copper bands, 15 dovetail grooves, 16 Sealing mounting grooves.
Embodiment
Like Fig. 1, shown in 2, be oil hydraulic cylinder, comprise cylinder barrel 1, rear end cover 9, piston 5, piston rod 2, the front end of cylinder barrel 1 is provided with preceding hydraulic fluid port seat 4, and the rear end of cylinder barrel is provided with back hydraulic fluid port seat 7, and back hydraulic fluid port seat 7 is connected through oil pipe 3 with preceding hydraulic fluid port seat 4.First oilhole 6 that is connected with back hydraulic fluid port seat 7 radially is set on the rear end cover 9, second oilhole 10 that is connected with cylinder barrel 1 rodless cavity axially is set on the rear end cover 9, hydraulic lock 8 is set in the rear end cover 9; The filler opening of hydraulic lock 8 connects the 3rd oilhole 11; The other end of the 3rd oilhole 11 connects first oilhole 6, and the oil outlet of hydraulic lock 8 connects second oilhole 10, and the control mouth of hydraulic lock 8 connects inclined hole 12; Inclined hole 12 is arranged in the rear end cover 9, and the other end of inclined hole 12 connects back hydraulic fluid port seat 7.
Like Fig. 1, shown in 3, the outer periphery of piston 5 is provided with Sealing mounting groove 16 and twice dovetail groove 15, and combined seal ring 13 is set in the Sealing mounting groove 16.Combined seal ring 13 comprises a matrix seal ring 13-2, a star circle 13-1 and two O shape circle 13-4; The outer periphery of matrix seal ring 13-2 is provided with groove 13-3; Star circle 13-1 is arranged in the groove 13-3, and two O shape circle 13-4 are separately positioned between matrix seal ring 13-2 and the piston 5.Two copper bands 14 are set between piston 5 and the cylinder barrel 1, and each copper band 14 is welded on the periphery of the piston 5 in the dovetail groove 15 respectively, and two copper bands 14 are separately positioned on the both sides, front and back of combined seal ring 13.
Claims (3)
1. oil hydraulic cylinder comprises cylinder barrel, rear end cover, piston, piston rod, and the front end of cylinder barrel is provided with preceding hydraulic fluid port seat; The rear end of cylinder barrel is provided with back hydraulic fluid port seat, and first oilhole that is connected with back hydraulic fluid port seat radially is set on the said rear end cover, and second oilhole that is connected with the cylinder barrel rodless cavity axially is set on the rear end cover; The outer periphery of said piston is provided with the Sealing mounting groove, it is characterized in that: in the said rear end cover hydraulic lock is set, the filler opening of hydraulic lock connects the 3rd oilhole; The other end of the 3rd oilhole connects said first oilhole; The oil outlet of hydraulic lock connects said second oilhole, and the control mouth of hydraulic lock connects inclined hole, and inclined hole is arranged in the rear end cover; The other end of inclined hole connects back hydraulic fluid port seat, hydraulic fluid port seat before back hydraulic fluid port seat connects through oil pipe; In the said Sealing mounting groove combined seal ring is set; Combined seal ring comprises a matrix seal ring, a star circle and two O shape circles; The outer periphery of matrix seal ring is provided with groove, and the star circle is arranged in the groove, and two O shape circles are separately positioned between matrix seal ring and the piston.
2. oil hydraulic cylinder according to claim 1 is characterized in that: two copper bands are set between said piston and the cylinder barrel, and each copper band is welded on the periphery of piston respectively, and two copper bands are separately positioned on the both sides, front and back of combined seal ring.
3. oil hydraulic cylinder according to claim 1 and 2 is characterized in that: the periphery of said piston also is provided with the twice dovetail groove, and each copper band is separately positioned in the corresponding dovetail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120242778U CN202149097U (en) | 2011-07-12 | 2011-07-12 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120242778U CN202149097U (en) | 2011-07-12 | 2011-07-12 | Hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149097U true CN202149097U (en) | 2012-02-22 |
Family
ID=45590157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120242778U Expired - Fee Related CN202149097U (en) | 2011-07-12 | 2011-07-12 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202149097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832494A (en) * | 2015-05-18 | 2015-08-12 | 重庆青山工业有限责任公司 | Piston ring sealing structure of circular double-acting cylinder |
-
2011
- 2011-07-12 CN CN201120242778U patent/CN202149097U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832494A (en) * | 2015-05-18 | 2015-08-12 | 重庆青山工业有限责任公司 | Piston ring sealing structure of circular double-acting cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20120712 |