CN203835857U - Straight-stroke air cylinder device - Google Patents
Straight-stroke air cylinder device Download PDFInfo
- Publication number
- CN203835857U CN203835857U CN201420290479.2U CN201420290479U CN203835857U CN 203835857 U CN203835857 U CN 203835857U CN 201420290479 U CN201420290479 U CN 201420290479U CN 203835857 U CN203835857 U CN 203835857U
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- China
- Prior art keywords
- cylinder
- air cylinder
- piston rod
- ring
- lower cover
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- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000004484 Briquette Substances 0.000 claims description 22
- 210000004907 gland Anatomy 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract 3
- 238000007906 compression Methods 0.000 abstract 3
- 238000005299 abrasion Methods 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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- Actuator (AREA)
Abstract
The utility model relates to a straight-stroke air cylinder device and belongs to the field of air cylinder devices. The straight-stroke air cylinder device solves the problem in the prior art that an air diaphragm and a sealing ring are easy to damage to result in service life shortening of an air cylinder. According to the straight-stroke air cylinder device, the outer edge of a piston ring is close to the inner wall of an air cylinder inner cavity and spaced from the inner wall of the air cylinder inner cavity at a certain gap; the edge of the through hole of an air cylinder lower cover is protruded to form a ring-shaped protrusion; a dry bearing, a V-type sealing ring, a compression spring and a press cover used for compressing the V-type sealing ring and the compression spring are sequentially connected between a piston rod and the inner wall of the a flange from top to bottom in a sleeve mode. According to the straight-stroke air cylinder device, when the V-type sealing ring is damaged due to abrasion, the compression spring expands to compensate the abrasion of the V-type sealing ring to achieve long-time sealing effects; the piston ring is enlarged and accordingly the outer edge of the piston ring is close to the inner wall of the air cylinder inner cavity, the stress born by the air diaphragm can be reduced and further the service life of the air cylinder can be prolonged.
Description
Technical field
The utility model relates to cylinder assembly, is specifically related to a kind of cylinder assembly of straight journey.
Background technique
Straight journey cylinder assembly in the pneumatic actuator that existing modulating valve uses, comprises cylinder upper cover and lower cover of air cylinder, wind diaphragm, piston and spring, and piston comprises piston ring and piston rod.The edge of wind diaphragm is fixed on the junction point of cylinder upper cover and lower cover of air cylinder, and the diameter of piston ring is less, and its Edge Distance cylinder inner wall is far away; The original state of this cylinder is spring precompressed, precompression throttle down; Pass into after source of the gas, promote piston ring and wind diaphragm, drive piston rod straight line motion Open valve.This type of cylinder mainly has the following disadvantages: cylinder inner cavity and piston ring gap are larger, when pressurized air enters, makes wind diaphragm applied force excessive, easily causes wind diaphragm to damage.When cylinder stroke is large, wind diaphragm is subject to very large pulling force, equally also causes wind diaphragm to damage too early, has shortened the working life of cylinder.In addition,, in existing straight journey cylinder assembly, the periphery of piston rod tends to put seal ring, but due to repeatedly to-and-fro motion of piston rod, seal ring is easily worn, thereby can affect sealing effect, and then have influence on the use of cylinder, shorten the working life of cylinder.
Model utility content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of cylinder assembly of straight journey, its solved that prior art exists because of wind diaphragm and the fragile problem that causes cylinder to shorten working life of seal ring.
For addressing the above problem, the technological scheme that the utility model adopts is as follows:
A cylinder assembly for straight journey, comprises cylinder upper cover, lower cover of air cylinder, circular sealed briquette, circular piston ring, piston rod and circular wind diaphragm; Described cylinder upper cover and lower cover of air cylinder are bonded with each other and form the cylinder inner cavity of sealing; The center of described lower cover of air cylinder is provided with the through hole passing for piston rod, and described piston rod is included in inner segment in cylinder inner cavity and outer section outside cylinder inner cavity, and described inner segment passes from described through hole; The diameter that the diameter of described inner segment is less than outer section; Described sealed briquette, wind diaphragm and piston ring are socketed in the inner segment of piston rod successively; Described sealed briquette is stuck in the boundary of described inner segment and described outer section; The inward flange of described wind diaphragm is fixed on sealed briquette, and its outward edge is fixed on the junction point of cylinder upper cover and lower cover of air cylinder; The fixedly sleeved inner segment at described piston rod of described piston ring, and be positioned at the top of wind diaphragm, described piston ring outward edge is near the inwall of cylinder inner cavity, and and the inwall of cylinder inner cavity between have gap; Cylinder inner cavity is separated into upper cavity and lower chamber by described sealed briquette, piston ring and wind diaphragm; Described lower cover of air cylinder is at the convex parts of outwardly formation one annular in the edge of described through hole, is socketed with successively from top to bottom dry type bearing, V-shaped seal ring and Compress Spring and the gland for V-shaped seal ring and Compress Spring are compressed between described piston rod and the inwall of flange; Described lower cover of air cylinder is provided with air source inlet.
Preferably, on described piston rod, the above and below of described V-shaped seal ring is also socketed with respectively seal washer.
Preferably, between cylinder upper cover and piston ring, be provided with cylinder spring; In the time not inflating to cylinder inner cavity, cylinder spring is in its pre-compressed state.
Preferably, described cylinder spring is provided with several, and described several cylinder springs are evenly distributed on piston ring around piston rod.
Preferably, it also comprises exhaust port, and described exhaust port is located at the top of cylinder upper cover.
Preferably, the upper surface of described sealed briquette is provided with the first mounting groove of ring-type around piston rod, and the inward flange of described wind diaphragm is arranged in described the first mounting groove.
Preferably, the edge of described cylinder upper cover and described lower cover of air cylinder all extends radially outward out flange connector, and described cylinder upper cover and described lower cover of air cylinder are fixed by screw at flange connector place.
Preferably, the lower surface at connection edge of described cylinder upper cover and the upper surface correspondence of the flange connector of lower cover of air cylinder are provided with the second mounting groove of ring-type, and the outward edge of described wind diaphragm is arranged in described the second mounting groove.
Preferably, the end of the inner segment of described piston rod is fixed on piston ring on piston rod by a nut.
Preferably, the inner peripheral surface of described circular sealed briquette is provided with annular groove, and O RunddichtringO is installed in described annular groove.
Compared to existing technology, the beneficial effects of the utility model are:
The utility model is by Compress Spring is set below V-shaped seal ring, and in the time that V-shaped seal ring is impaired because rubbing, Compress Spring expands, and has made up the wearing and tearing of V-shaped seal ring, thereby has realized permanent sealing effect, and then can extend the working life of cylinder.The utility model has increased piston ring, makes the inwall of piston ring outward edge near cylinder inner cavity, thereby wind diaphragm applied force is diminished, and increases the working life of this device.
Brief description of the drawings
Fig. 1 is cross section structure schematic diagram of the present utility model;
Fig. 2 is the enlarged view of A in Fig. 1;
Wherein, 1, cylinder upper cover; 10, flange connector; 2, lower cover of air cylinder; 20, the second mounting groove; 21, convex parts; 3, piston rod; 4, piston ring; 5, sealed briquette; 51, the first mounting groove; 52, annular groove; 6, wind diaphragm; 7, cylinder spring; 8, exhaust port; 11, dry type bearing; 12, V-shaped seal ring; 13, seal washer; 14, Compress Spring; 15, gland.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
A cylinder assembly for straight journey, comprises cylinder upper cover 1 and lower cover of air cylinder 2, circular sealed briquette 5, circular piston ring 4, piston rod 3, circular wind diaphragm 6, cylinder spring 7, exhaust port 8.Cylinder upper cover 1 and lower cover of air cylinder 2 are bonded with each other and form the cylinder inner cavity of sealing, and the center of lower cover of air cylinder 2 is provided with the through hole passing for piston rod 3, and piston rod 3 is included in inner segment in cylinder inner cavity and outer section outside cylinder inner cavity, and inner segment passes from through hole.The diameter that the diameter of inner segment is less than outer section.Sealed briquette 5, wind diaphragm 6 and piston ring 4 are socketed in the inner segment of piston rod 3 successively, and sealed briquette 5 is stuck in the boundary of inner segment and outer section.The inward flange of wind diaphragm 6 is fixed on sealed briquette 5, and its outward edge is fixed on the junction point of cylinder upper cover 1 and lower cover of air cylinder 2.As preferred embodiment, the upper surface of sealed briquette 5 is provided with the first mounting groove 51 of ring-type around piston rod 3, and the inward flange of wind diaphragm 6 is arranged in the first mounting groove 51.The edge of cylinder upper cover 1 and lower cover of air cylinder 2 all extends radially outward out flange connector 10, and cylinder upper cover 1 and lower cover of air cylinder 2 are fixed by screw at flange connector 10 places.The upper surface correspondence of the lower surface at the connection edge of cylinder upper cover 1 and the flange connector 10 of lower cover of air cylinder 2 is provided with the second mounting groove 20 of ring-type, and the outward edge of wind diaphragm 6 is arranged in the second mounting groove 20.The fixedly sleeved inner segment at piston rod 3 of piston ring 4, and be positioned at the top of wind diaphragm 6.Piston ring 4 outward edges are near the inwall of cylinder inner cavity, and and the inwall of cylinder inner cavity between have gap.The utility model increases piston ring 4, the gap between the inwall of piston ring 4 and cylinder inner cavity is reduced, thereby can reduce the stressed of wind diaphragm 6, thereby can safeguard wind diaphragm 6.The end of the inner segment of piston rod 3 is fixed on piston ring 4 on piston rod 3 by a nut.Cylinder inner cavity is separated into upper cavity and lower chamber by sealed briquette 5, piston ring 4 and wind diaphragm 6.In order to increase sealing effect, in the inner peripheral surface of circular sealed briquette 5, be also provided with annular groove 52, O RunddichtringO is installed in annular groove 52.Lower cover of air cylinder 2 is at the convex parts 21 of outwardly formation one annular in the edge of through hole, between the inwall of piston rod 3 and convex parts 21, be socketed with successively from top to bottom dry type bearing 11, V-shaped seal ring 12 and Compress Spring 14 and the gland 15 for V-shaped seal ring 12 and Compress Spring 14 are compressed, in order to strengthen sealing effect, on piston rod 3, the above and below of V-shaped seal ring 12 is also socketed with respectively seal washer 13.V-shaped seal ring 12 is the V-shaped seal ring 12 of PTFE+ glass fibre+molybdenum dioxide, and its sealing effect is permanent, and its below is provided with Compress Spring 14, V-shaped seal ring 12 rub impaired in Compress Spring 14 expand, can safeguard sealing effect.Lower cover of air cylinder 2 is provided with air source inlet (not marking in figure).Cylinder spring 7 is arranged between cylinder upper cover 1 and piston ring 4, and in the time not inflating to cylinder inner cavity, cylinder spring 7 is in its pre-compressed state, and it can provide a larger rebounding force.As preferred embodiment, cylinder spring 7 is provided with several, and described several cylinder springs 7 are evenly distributed on piston ring 4 around piston rod 3.The utility model also comprises exhaust port 8, and exhaust port 8 is located at the top of cylinder upper cover 1.
When use, open source of the gas, the lower chamber of gas cylinders, gas push piston ring 4 and upwards straight line motion of wind diaphragm 6, control exhaust port 8 by piston rod 3 and upwards open.Close source of the gas, the elastic force of cylinder spring 7 moves downward piston rod 3, and control valve is closed downwards.
Above-mentioned mode of execution is only preferred implementation of the present utility model; the scope that can not limit with this utility model protection, the variation of any unsubstantiality that those skilled in the art does on basis of the present utility model and replacement all belong to the utility model scope required for protection.
Claims (10)
1. a cylinder assembly for straight journey, is characterized in that: comprise cylinder upper cover, lower cover of air cylinder, circular sealed briquette, circular piston ring, piston rod and circular wind diaphragm; Described cylinder upper cover and lower cover of air cylinder are bonded with each other and form the cylinder inner cavity of sealing; The center of described lower cover of air cylinder is provided with the through hole passing for piston rod, and described piston rod is included in inner segment in cylinder inner cavity and outer section outside cylinder inner cavity, and described inner segment passes from described through hole; The diameter that the diameter of described inner segment is less than outer section; Described sealed briquette, wind diaphragm and piston ring are socketed in the inner segment of piston rod successively; Described sealed briquette is stuck in the boundary of described inner segment and described outer section; The inward flange of described wind diaphragm is fixed on sealed briquette, and its outward edge is fixed on the junction point of cylinder upper cover and lower cover of air cylinder; The fixedly sleeved inner segment at described piston rod of described piston ring, and be positioned at the top of wind diaphragm, the outward edge of described piston ring is near the inwall of cylinder inner cavity, and and the inwall of cylinder inner cavity between have gap; Cylinder inner cavity is separated into upper cavity and lower chamber by described sealed briquette, piston ring and wind diaphragm; Described lower cover of air cylinder is at the convex parts of outwardly formation one annular in the edge of described through hole, is socketed with successively from top to bottom dry type bearing, V-shaped seal ring and Compress Spring and the gland for V-shaped seal ring and Compress Spring are compressed between described piston rod and the inwall of flange; Described lower cover of air cylinder is provided with air source inlet.
2. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: on described piston rod, the above and below of described V-shaped seal ring is also socketed with respectively seal washer.
3. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: between cylinder upper cover and piston ring, be provided with cylinder spring; In the time not inflating to cylinder inner cavity, cylinder spring is in its pre-compressed state.
4. the cylinder assembly of a kind of straight journey as claimed in claim 3, is characterized in that: described cylinder spring is provided with several, and described several cylinder springs are evenly distributed on piston ring around piston rod.
5. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: it also comprises exhaust port, and described exhaust port is located at the top of cylinder upper cover.
6. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: the upper surface of described sealed briquette is provided with the first mounting groove of ring-type around piston rod, the inward flange of described wind diaphragm is arranged in described the first mounting groove.
7. the cylinder assembly of a kind of straight journey as claimed in claim 6, it is characterized in that: the edge of described cylinder upper cover and described lower cover of air cylinder all extends radially outward out flange connector, described cylinder upper cover and described lower cover of air cylinder are fixed by screw at flange connector place.
8. the cylinder assembly of a kind of straight journey as claimed in claim 7, it is characterized in that: the lower surface at connection edge of described cylinder upper cover and the upper surface correspondence of the flange connector of lower cover of air cylinder are provided with the second mounting groove of ring-type, and the outward edge of described wind diaphragm is arranged in described the second mounting groove.
9. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: the end of the inner segment of described piston rod is fixed on piston ring on piston rod by a nut.
10. the cylinder assembly of a kind of straight journey as claimed in claim 1, is characterized in that: the inner peripheral surface of described circular sealed briquette is provided with annular groove, and O RunddichtringO is installed in described annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290479.2U CN203835857U (en) | 2014-05-30 | 2014-05-30 | Straight-stroke air cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290479.2U CN203835857U (en) | 2014-05-30 | 2014-05-30 | Straight-stroke air cylinder device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835857U true CN203835857U (en) | 2014-09-17 |
Family
ID=51513704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420290479.2U Expired - Fee Related CN203835857U (en) | 2014-05-30 | 2014-05-30 | Straight-stroke air cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835857U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413028A (en) * | 2018-05-15 | 2018-08-17 | 西安法士特汽车传动有限公司 | A kind of power takeoff cylinder and gearing device |
| CN110630585A (en) * | 2019-10-11 | 2019-12-31 | 常熟市徐润机电有限公司 | Pneumatic device |
-
2014
- 2014-05-30 CN CN201420290479.2U patent/CN203835857U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413028A (en) * | 2018-05-15 | 2018-08-17 | 西安法士特汽车传动有限公司 | A kind of power takeoff cylinder and gearing device |
| CN110630585A (en) * | 2019-10-11 | 2019-12-31 | 常熟市徐润机电有限公司 | Pneumatic device |
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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: 20140917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |