CN105065365A - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN105065365A CN105065365A CN201510503700.7A CN201510503700A CN105065365A CN 105065365 A CN105065365 A CN 105065365A CN 201510503700 A CN201510503700 A CN 201510503700A CN 105065365 A CN105065365 A CN 105065365A
- Authority
- CN
- China
- Prior art keywords
- piston rod
- cylinder
- described piston
- oil hydraulic
- hydraulic cylinder
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention provides a hydraulic cylinder, which comprises a cylinder barrel, a piston, a piston rod and a cylinder cover, wherein the cylinder barrel is a hollow barrel; the piston is platy; the piston rod is rod-like; one end of the piston rod is fixedly connected to one side of the piston; the cylinder cover is arranged at one end of the cylinder barrel; an inner hole used for the piston rod to penetrate is formed in the cylinder cover; the piston rod and the piston can do reciprocating motion inside the cylinder barrel; the cross section of the piston rod is a non-circle cross section; a non-circle inner hole which is matched with the piston rod is formed in the cylinder cover; and the piston rod and the inner hole in the cylinder cover are in close fit, so that the circumferential limit of the piston rod can be realized. The hydraulic cylinder is capable of preventing the piston rod from deflecting.
Description
Technical field
The present invention relates to a kind of engineering machinery, be specifically related to a kind of oil hydraulic cylinder.
Background technique
In the shield-tunneling construction process of tunnelling works, because the calibration of section of jurisdiction is varied, cause the layout of propelling hydraulic cylinder also varied, comprise single cylinder layout, twin-tub arranges and single twin-tub replaces the multiple arrangements such as layout.When oil hydraulic cylinder adopts twin-tub to arrange, two piston-rod ends generally share support boots, such piston rod two piston rods in the process of stretching out there will not be the deflection action along piston rod circumference because structure limits mutually, and namely two driving cylinder there will not be circumferential deflection (rotation) action of piston rod and support boots opposing hydraulic cylinder cylinder body.Single propelling hydraulic cylinder is then different, stretch out at piston rod until touch in the process of section of jurisdiction inside shield tail, because piston rod does not limit its structure deflected in circumference, circumferential deflection will be there is gradually at many factors comprehensive function lower piston rods such as support boots gravity, the even frictional force of piston rod circumferential asymmetry, and then drive the support boots be attached thereto to deflect.
After the support boots of hydraulic cylinder piston rod end deflect, destroy support boot upper plate and the normal fit-state of section of jurisdiction, cause only some support boots to contact with section of jurisdiction, be degrading the stress supportting boots and piston rod, even cause supportting boots plate and damaged by pressure; Secondly, the support boots of deflection will directly compress the rubber seal being arranged on side, section of jurisdiction, and long uneven pressurized and lateral force will cause the destruction of section of jurisdiction rubber seal.In addition, in order to correct the piston rod deflection occurred, workmen manually must will support boots " righting " after shield machine stops propelling, and this process not only affects construction speed but also easily have an accident.Therefore, prevent single propelling hydraulic cylinder support boots deflection of shield machine from becoming shield machine design and use process problem demanding prompt solution.
Prior art literature search is found, the patent No. is CN201120217566, name is called that the technological scheme of " single-hold-boot anti-rotating oil cylinder of shield machine " is matched by guide pad on the piston rod and the gib block on shield tail and realizes anti-deflection function, but the gap between the guide pad of the program and shield tail inwall and the gap between gib block and support boots side all can not be too little, otherwise the rotation that can limit between shield tail and front shield body (middle shield), this is by the relative rotation angle between restriction shield tail and the shield body (middle shield) installing oil hydraulic cylinder, for articulated shield machine, mean that radius of turn will increase greatly, and then reduce the cornering ability of shield machine.
The patent No. is CN202833412U, name is called " Deflection-preventinmultistage multistage oil cylinder ", the patent No. is CN202833401U, name is called that the technological scheme of " the anti-deflection hydraulic jack with guide function " these two patents is all by arranging the circumferential deflection that the keyway with guiding and limit function prevents piston rod at piston rod center, but piston rod village hollowing must reduce its rigidity, thus reduction bearing capacity, complex structure in addition, processing cost is higher.
In addition, the patent No. is CN201220728489, name is called that the patent document of " elliptical hydraulic cylinder " discloses " inner chamber molded line " for oval feature, its piston must be corresponding ellipse, because piston does high speed to-and-fro motion in cylinder cavity, with inner wall of cylinder severe friction, but this is designed to ellipse, stress can be caused to concentrate at oval major axis two ends, heavy wear seal ring, affects sealability.
Summary of the invention
For overcoming deficiency of the prior art, the invention provides a kind of oil hydraulic cylinder preventing piston rod from deflecting.
Described oil hydraulic cylinder comprises cylinder barrel, piston, piston rod and cylinder cap, described cylinder barrel is hollow cylinder, described piston is tabular, described piston rod is shaft-like, described piston rod one end is fixedly connected with described piston side, described cylinder cap is located at described cylinder barrel one end, and has the endoporus running through setting for described piston rod, and described piston rod and described piston move reciprocatingly in described cylinder barrel; The cross section of described piston rod is non-circular cross-section, and described cylinder cap has the not rounded endoporus coordinated with it, and the endoporus of described piston rod and described cylinder cap closely cooperates; Thus the circumference realizing described piston rod is spacing.
In the present invention, described cross section is the cross section vertical with described piston rod movement direction with described piston.
According to a preferred embodiment of the present invention, the cross section of described piston rod is oval, and the endoporus that described cylinder cap coordinates with it is same ellipse.
According to a preferred embodiment of the present invention, the cross section of described piston rod is long-round-shape, and the endoporus that described cylinder cap coordinates with it is same long-round-shape; Described long-round-shape is made up of isodiametric two semicircles in the left and right sides and middle two sections of parallel lines.
According to a preferred embodiment of the present invention, the cross section of described piston rod is rounded square, and the endoporus that described cylinder cap coordinates with it is same rounded square.
According to a preferred embodiment of the present invention, the side that coordinates with described cylinder barrel of described piston and/or described cylinder barrel internal surface are provided with wearing layer; Or described piston rod outer surface and/or described inner hole of cylinder cover surface are provided with wearing layer.
According to a preferred embodiment of the present invention, also comprise multiple seal ring, described multiple seal ring is parallel is located at described piston side, or parallel be located at described inner hole of cylinder cover surface.
According to a preferred embodiment of the present invention, described cylinder barrel is carbon fiber composite cylinder barrel, and described piston is carbon fiber composite piston, and described piston rod is carbon fiber composite piston rod.
According to a preferred embodiment of the present invention, described carbon fiber is the carbon fiber of intensity >=3800MPa.
According to a preferred embodiment of the present invention, also comprise damping device, described cylinder cap internal surface is located at by described damping device.
According to a preferred embodiment of the present invention, described damping device is the spring that multiple array is arranged.
Technological scheme provided by the invention has following beneficial effect:
1, by the improvement to described piston and described cylinder barrel, or the improvement to described piston rod and described inner hole of cylinder cover, can prevent described piston rod from deflect, it is not damaged that boots are supportted in protection.
2, above improvement fundamentally solves the problem of described piston rod deflection, improves working efficiency.
3, because of without the need to manual operation, therefore the Security of equipment can also be increased.
4, the shape of inner cavity of cylinder not changing piston and be mated, makes the unlikely stress that causes of seal ring concentrate, does not affect sealability.
5, simplify manufacturing process, reduce manufacture cost.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing described below is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the sectional view of oil hydraulic cylinder provided by the invention;
The A-A view of the oil hydraulic cylinder of Fig. 2 to be cross section be oval piston rod;
The A-A view of Fig. 3 to be cross section be oil hydraulic cylinder of oblong piston rod;
The A-A view of Fig. 4 to be cross section be oil hydraulic cylinder of the piston rod of rounded square;
In figure: 1: cylinder barrel, 2: piston, 3: piston rod, 4: cylinder cap, 5: seal ring, 6: damping device.
Embodiment
Below in conjunction with accompanying drawing of the present invention, carry out clear, complete description to the technological scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.
Refer to Fig. 1, described oil hydraulic cylinder comprises cylinder barrel 1, piston 2, piston rod 3 and cylinder cap 4, described cylinder barrel 1 is hollow cylinder, described piston 2 is tabular, described piston rod 3 is shaft-like, described piston rod 3 one end is fixedly connected with described piston 2 side, described cylinder cap 4 is located at described cylinder barrel 1 one end, and there is the endoporus running through setting for described piston rod 3, described piston rod 3 and described piston 2 move reciprocatingly in described cylinder barrel 1, the cross section of described piston rod 3 is non-circular cross-section, and described cylinder cap 4 has the not rounded endoporus coordinated with it.
Described piston 2 all closely cooperates with the endoporus of described cylinder cap 4 with described cylinder barrel 1, described piston rod 3, in case leak-stopping oil or reduction vibrations.
Refer to Fig. 2 ~ Fig. 4, the cross section of piston rod 3 shown in Fig. 2 is oval, the cross section of piston rod 3 shown in Fig. 3 is long-round-shape, described long-round-shape is made up of isodiametric two semicircles in the left and right sides and middle two sections of parallel lines, the cross section of piston rod 3 shown in Fig. 4 is rounded square, these three kinds of cross sections all can prevent described piston rod 3 in circumferential deflection well, do not affect the to-and-fro motion of described piston rod 3 simultaneously, the circular arc of ellipse, long-round-shape, rounded square all can reduce friction well, makes unlikely stress excessive and damages oil hydraulic cylinder.While described piston rod 3 sectional shape changes, the endoporus of described cylinder cap 4 is corresponding all with it to be changed, to cooperatively interact.
Preferably, the cross section of described piston rod 3 can also be that other are non-circular, all can play the effect that circumference is spacing.
Preferably, the side that coordinates with described cylinder barrel 1 of described piston 2 and/or described cylinder barrel 1 internal surface are provided with wearing layer; Or described piston rod 3 outer surface and/or described cylinder cap 4 bore area are provided with wearing layer, described wearing layer can extend the working life of oil hydraulic cylinder.
Preferably, described cylinder cap 4 endoporus is provided with multiple seal ring 5, to reduce friction, raises the efficiency.
Preferably, described cylinder cap 4 inner side surface is provided with damping device 6, and described damping device 6 is spring etc., to cushion the collision inside described piston 2 and described cylinder cap 4.Multiple described spring array distribution, evenly to cushion described piston 2 to the collision inside described cylinder cap 4.
Preferably, described cylinder barrel 1 meets material cylinder barrel for carbon fiber, and described piston 2 is carbon fiber composite piston, and described piston rod 3 is carbon fiber composite piston rod.
Preferably, described carbon fiber is the carbon fiber of intensity >=3800MPa.
Technological scheme provided by the invention has following beneficial effect:
1, by the improvement to described piston 2 and described cylinder barrel 1, or the improvement to described piston rod 3 and described cylinder cap 4 endoporus, can prevent described piston rod 3 from deflecting, protection support boots are not damaged.
2, above improvement fundamentally solves the problem of described piston rod 3 deflection, improves working efficiency.
3, because of without the need to manual operation, therefore the Security of equipment can also be increased.
4, the shape of inner cavity of cylinder not changing piston and be mated, makes the unlikely stress that causes of seal ring concentrate, does not affect sealability.
5, simplify manufacturing process, reduce manufacture cost.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an oil hydraulic cylinder, comprise cylinder barrel (1), piston (2), piston rod (3) and cylinder cap (4), described cylinder barrel is hollow cylinder, described piston is tabular, described piston rod is shaft-like, and described piston rod one end is fixedly connected with described piston side, and described cylinder cap is located at described cylinder barrel one end, and there is the endoporus running through setting for described piston rod, described piston rod and described piston move reciprocatingly in described cylinder barrel;
The cross section of described piston rod is non-circular cross-section, and described cylinder cap has the not rounded endoporus coordinated with it, and the endoporus of described piston rod and described cylinder cap closely cooperates; Thus the circumference realizing described piston rod is spacing.
2. oil hydraulic cylinder according to claim 1, is characterized in that: the cross section of described piston rod is for oval, and the endoporus that described cylinder cap coordinates with it is same ellipse.
3. oil hydraulic cylinder according to claim 1, is characterized in that: the cross section of described piston rod is long-round-shape, and the endoporus that described cylinder cap coordinates with it is same long-round-shape;
Described long-round-shape is made up of isodiametric two semicircles in the left and right sides and middle two sections of parallel lines.
4. oil hydraulic cylinder according to claim 1, is characterized in that: the cross section of described piston rod is rounded square, and the endoporus that described cylinder cap coordinates with it is same rounded square.
5. oil hydraulic cylinder according to claim 1, is characterized in that: the side that described piston coordinates with described cylinder barrel and/or described cylinder barrel internal surface are provided with wearing layer;
Or described piston rod outer surface and/or described inner hole of cylinder cover surface are provided with wearing layer.
6. oil hydraulic cylinder according to claim 1, is characterized in that: also comprise multiple seal ring (5), and described multiple seal ring is parallel is located at described piston side, or parallel be located at described inner hole of cylinder cover surface.
7. oil hydraulic cylinder according to claim 1, is characterized in that: described cylinder barrel is carbon fiber composite cylinder barrel, and described piston is carbon fiber composite piston, and described piston rod is carbon fiber composite piston rod.
8. oil hydraulic cylinder according to claim 7, is characterized in that: described carbon fiber is the carbon fiber of intensity >=3800MPa.
9. oil hydraulic cylinder according to claim 1, is characterized in that: also comprise damping device (6), and described cylinder cap internal surface is located at by described damping device.
10. oil hydraulic cylinder according to claim 9, is characterized in that: described damping device is the spring that multiple array is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503700.7A CN105065365A (en) | 2015-08-14 | 2015-08-14 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503700.7A CN105065365A (en) | 2015-08-14 | 2015-08-14 | Hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105065365A true CN105065365A (en) | 2015-11-18 |
Family
ID=54494836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510503700.7A Pending CN105065365A (en) | 2015-08-14 | 2015-08-14 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105065365A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740794A (en) * | 2016-01-06 | 2018-02-27 | 合肥龙精灵信息技术有限公司 | A kind of cylinder of cubic cylindricality piston rod |
| CN108591171A (en) * | 2018-07-13 | 2018-09-28 | 宁波索力特复合材料有限公司 | A kind of pressure-driven cylinder |
| CN115107262A (en) * | 2022-08-30 | 2022-09-27 | 浙江大学 | Rigidity-variable metal-lining-free carbon fiber reinforced hydraulic cylinder |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2093920U (en) * | 1991-07-18 | 1992-01-22 | 机械电子工业部北京机械工业自动化研究所 | Cylinder with mechanism preventing rotation of piston rod |
| JPH0429603A (en) * | 1990-05-25 | 1992-01-31 | Nissan Motor Co Ltd | High-rigidity cylinder |
| CN202048050U (en) * | 2011-04-27 | 2011-11-23 | 蒋博平 | Oil cylinder with wear-preventive cylinder cover |
| CN202251213U (en) * | 2011-09-09 | 2012-05-30 | 宁波利达气动成套有限公司 | Rotation-preventing cylinder |
| CN202483983U (en) * | 2012-02-17 | 2012-10-10 | 王友桂 | Hydraulic oil cylinder |
| CN203297186U (en) * | 2013-05-14 | 2013-11-20 | 北汽福田汽车股份有限公司 | Hydraulic oil cylinder |
| CN104074831A (en) * | 2014-06-25 | 2014-10-01 | 周开雄 | Hydraulic cylinder made from carbon fibre composite |
| CN104154072A (en) * | 2014-07-30 | 2014-11-19 | 莱歇研磨机械制造(上海)有限公司 | Improved structure of hydraulic cylinder of hydraulic loading system for mill |
| CN204127029U (en) * | 2014-10-12 | 2015-01-28 | 山东兴田机械有限公司 | A kind of hydraulic jack of high wear resistance |
| CN104791322A (en) * | 2015-04-30 | 2015-07-22 | 天津市泉龙工贸有限公司 | Oval air cylinder |
| CN204851846U (en) * | 2015-08-14 | 2015-12-09 | 中国铁建重工集团有限公司 | Pneumatic cylinder |
-
2015
- 2015-08-14 CN CN201510503700.7A patent/CN105065365A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0429603A (en) * | 1990-05-25 | 1992-01-31 | Nissan Motor Co Ltd | High-rigidity cylinder |
| CN2093920U (en) * | 1991-07-18 | 1992-01-22 | 机械电子工业部北京机械工业自动化研究所 | Cylinder with mechanism preventing rotation of piston rod |
| CN202048050U (en) * | 2011-04-27 | 2011-11-23 | 蒋博平 | Oil cylinder with wear-preventive cylinder cover |
| CN202251213U (en) * | 2011-09-09 | 2012-05-30 | 宁波利达气动成套有限公司 | Rotation-preventing cylinder |
| CN202483983U (en) * | 2012-02-17 | 2012-10-10 | 王友桂 | Hydraulic oil cylinder |
| CN203297186U (en) * | 2013-05-14 | 2013-11-20 | 北汽福田汽车股份有限公司 | Hydraulic oil cylinder |
| CN104074831A (en) * | 2014-06-25 | 2014-10-01 | 周开雄 | Hydraulic cylinder made from carbon fibre composite |
| CN104154072A (en) * | 2014-07-30 | 2014-11-19 | 莱歇研磨机械制造(上海)有限公司 | Improved structure of hydraulic cylinder of hydraulic loading system for mill |
| CN204127029U (en) * | 2014-10-12 | 2015-01-28 | 山东兴田机械有限公司 | A kind of hydraulic jack of high wear resistance |
| CN104791322A (en) * | 2015-04-30 | 2015-07-22 | 天津市泉龙工贸有限公司 | Oval air cylinder |
| CN204851846U (en) * | 2015-08-14 | 2015-12-09 | 中国铁建重工集团有限公司 | Pneumatic cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740794A (en) * | 2016-01-06 | 2018-02-27 | 合肥龙精灵信息技术有限公司 | A kind of cylinder of cubic cylindricality piston rod |
| CN108591171A (en) * | 2018-07-13 | 2018-09-28 | 宁波索力特复合材料有限公司 | A kind of pressure-driven cylinder |
| CN115107262A (en) * | 2022-08-30 | 2022-09-27 | 浙江大学 | Rigidity-variable metal-lining-free carbon fiber reinforced hydraulic cylinder |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |