CN201358975Y - Novel hydraulic cylinder - Google Patents
Novel hydraulic cylinder Download PDFInfo
- Publication number
- CN201358975Y CN201358975Y CNU2008200249921U CN200820024992U CN201358975Y CN 201358975 Y CN201358975 Y CN 201358975Y CN U2008200249921 U CNU2008200249921 U CN U2008200249921U CN 200820024992 U CN200820024992 U CN 200820024992U CN 201358975 Y CN201358975 Y CN 201358975Y
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- China
- Prior art keywords
- sealing
- piston rod
- cylinder
- piston
- guide sleeve
- 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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- Sealing Devices (AREA)
Abstract
The utility model discloses a novel hydraulic cylinder which comprises a cylinder body, a guide sleeve as well as a piston and a piston rod that are sheathed in the cylinder body, wherein the piston rod is sealed with the guide sleeve to have the structure that framework dust prevention, main sealing, buffering high-pressure sealing and a composite bushing are sequentially arranged from outside to inside. The buffering high-pressure sealing can be used for preventing high-pressure impact from damaging the main sealing, thus prolonging the service life of the main sealing; the framework dust prevention can effectively avoid all outside contaminants such as dust, water and the like entering the cylinder, thus ensuring the cylinder to be clean; the main sealing prevents pressure oil in the cylinder from leaking outside; and the composite bushing is directly contacted with the piston rod to bear the side force of the piston rod, so that the amount of compression of a sealing part along the circumferential direction is consistent, and the sealing effect is improved.
Description
Technical field
The utility model belongs to the hydraulic element field, the oil hydraulic cylinder that particularly a kind of engineering machinery is used.
Background technique
At present, the action of equipment in the engineering machinery adopts the reciprocating double-action oil hydraulic cylinder that hydraulic pressure can be transformed into mechanical energy mostly, the turning to, overturn, excavate, hoist etc. of Control work device.The reciprocating double-action hydraulic cylinder piston rod sealing configuration of using in the existing engineering machinery is simple, causes oil leakage fault easily, influences quality of product and reliability, causes maintenance cost to improve.
Summary of the invention
Thereby the purpose of this utility model provides a kind of novel piston rod seal structure to improve the novel hydraulic cylinder of reliability and sealing effect with regard to being at the defective of above-mentioned prior art.
Its technical solution is as follows:
Novel hydraulic cylinder, it comprises cylinder body, guide sleeve and is sleeved on piston, piston rod in the cylinder body, is sealed into following structure between above-mentioned piston rod and the guide sleeve, is disposed with from outside to inside that skeleton is dustproof, primary seal, buffering high pressure sealing, composite bush.Above-mentioned buffering high pressure sealing can prevent that impacting with high pressure from damaging primary seal, prolongs the working life of primary seal; Dustproof all pollutants such as extraneous dust, water that can effectively stop of skeleton enter in the oil cylinder, guarantee the oil cylinder turbidity test; Primary seal prevents that oil cylinder internal pressure oil from leaking outside; Composite bush directly contacts with piston rod, bears the piston rod lateral force, guarantees Sealing decrement unanimity in a circumferential direction, improves sealing effect.
As improvement of the present utility model, above-mentioned piston external diameter is installed and is received dirty ring.The utility model is owing to receive dirty ring in the piston external diameter installation, the Sealing of piston and supporting member are arranged on two and receive between the dirty ring, above-mentionedly receive dirty ring and can stop that fluid or other foreign material contact with Sealing, thereby can effectively improve the working life and the reliability of piston seal.
As further improvement of the utility model, above-mentioned piston two ends are respectively arranged with the reducing throttle mechanism that floats with respect to the cylinder body two ends.Above-mentioned reducing throttle mechanism can make the oil back chamber inner fluid produce pressure because of throttling action, the mechanical energy that continue the piston element of motion this moment is absorbed by the fluid of oil back chamber, the internal pressure that produces in the oil back chamber is resisted mutually with inertial force, owing to be variable-diameter structure, along with orifice size is progressively dwindled in the increase of stroke, the strength ratio that kinetic energy is absorbed is more even, has not only reduced mechanical shock and vibrations but also can avoid excessive shock absorbing pressure.So-called float is exactly that plunger in the damping mechanism can radially carry out small adjustment automatically, can make the restriction effect The Gift of Being the Best You Can Be and reduce manufacture difficulty, effectively avoids piston impact to the cylinder body two ends when rundown, the protection associated components.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Figure is the structural representation of a kind of mode of execution of the utility model.
Embodiment
As shown in the figure, the utility model mainly comprises cylinder body 1, it is cylinder bottom 3 that cylinder body 1 an interior end is provided with guide sleeve 2 the other ends, piston rod 4 and piston 5 are sleeved in the inner chamber of cylinder block, Sealing 51, piston support ring 52 are arranged on the cock body of above-mentioned piston 5, respectively be provided with a high alloy at the two ends of cock body 5 and receive dirty ring 53; Be sealed into following structure between above-mentioned guide sleeve 2 and the piston rod 4: be followed successively by from outside to inside that skeleton is dustproof 41, primary seal 42, buffering high pressure sealing 43, composite bush 44; Above-mentioned piston 5 two ends are respectively arranged with the reducing throttle mechanism that floats.
Above-mentionedly receive dirty ring and can adopt cast-iron alloy or engineering plastics etc. suitable material is made.
The utility model includes but are not limited to above mode of execution, and other conspicuous variations all should not exceed protection domain of the present utility model.
Claims (1)
1, novel hydraulic cylinder, it comprises cylinder body, guide sleeve and is sleeved on piston, piston rod in the cylinder body, it is characterized in that: be sealed into following structure between described piston rod and the guide sleeve, be disposed with from outside to inside that skeleton is dustproof, primary seal, buffering high pressure sealing, composite bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200249921U CN201358975Y (en) | 2008-07-11 | 2008-07-11 | Novel hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200249921U CN201358975Y (en) | 2008-07-11 | 2008-07-11 | Novel hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201358975Y true CN201358975Y (en) | 2009-12-09 |
Family
ID=41424738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200249921U Expired - Fee Related CN201358975Y (en) | 2008-07-11 | 2008-07-11 | Novel hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201358975Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN107327437A (en) * | 2017-08-01 | 2017-11-07 | 沈阳玉衡科技有限公司 | The composite hydraulic cylinder body and its manufacture method of a kind of band filling skeleton |
-
2008
- 2008-07-11 CN CNU2008200249921U patent/CN201358975Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN107327437A (en) * | 2017-08-01 | 2017-11-07 | 沈阳玉衡科技有限公司 | The composite hydraulic cylinder body and its manufacture method of a kind of band filling skeleton |
| CN107327437B (en) * | 2017-08-01 | 2024-04-19 | 沈阳玉衡科技有限公司 | Composite material hydraulic cylinder body with filling framework and manufacturing method thereof |
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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 |
Granted publication date: 20091209 Termination date: 20140711 |
|
| EXPY | Termination of patent right or utility model |