CN201661543U - Extending position self-locking type hydraulic cylinder - Google Patents
Extending position self-locking type hydraulic cylinder Download PDFInfo
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- CN201661543U CN201661543U CN2010201135840U CN201020113584U CN201661543U CN 201661543 U CN201661543 U CN 201661543U CN 2010201135840 U CN2010201135840 U CN 2010201135840U CN 201020113584 U CN201020113584 U CN 201020113584U CN 201661543 U CN201661543 U CN 201661543U
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Abstract
An extending position self-locking hydraulic cylinder relates to a hydraulic cylinder, which is higher in control precision, stable, reliable and simple in structure. The hydraulic cylinder comprises a cylinder barrel, a front end cover, a rear end cover, a conical piston, a main piston, a piston rod, a positioning ring, a spring, steel balls and a piston rod nut. The cylinder barrel is provided with a central through hole, the barrel wall of the cylinder barrel is provided with an oil inlet hole and an oil outlet hole, and a groove is arranged on the inner wall at the front end of the cylinder barrel; the front end cover is detachably connected with the cylinder barrel via the positioning ring arranged between the cylinder barrel and the front end cover, and the rear end cover is detachably connected with the cylinder barrel; a groove is arranged on the main piston arranged inside the cylinder barrel, two holes are arranged on the outer circumference of the main piston, steel balls are arranged inside the holes, the main piston is provided with a central hole, an annular boss and threads are arranged on the piston rod, the conical piston is arranged inside the front end cover and provided with a through hole, the positioning spring is abutted to the front end of the conical piston, an anti-thrust port of the conical piston is clamped by the front end of the positioning ring, and the conical piston is provided with an oil hole; and the positioning spring is arranged inside the front end cover and abutted to the front end of the conical piston.
Description
Technical field
The utility model relates to a kind of oil hydraulic cylinder, especially relates to a kind of position self-locking type hydraulic cylinder that stretches out.
Background technique
Oil hydraulic cylinder is indispensable a kind of parts in the hydraulic system, and it is the energy conversion device that can convert fluid pressure to linear type mechanical energy.Hydraulic cylinder structure is simple, reliable operation, is widely used in each department of industrial production, as aspects such as engineering machinery, metallurgical and mining equipments.When oil hydraulic cylinder uses,, thereby produce various unnecessary troubles under the effect of external force or deadweight for the position that prevents piston rod moves, need be with hydraulic locking cylinder.Common oil hydraulic cylinder often needs multiple element such as one-way valve to realize locking function, normally adopts the mode of control selector valve oil circuit break-make to lock oil hydraulic cylinder.The shortcoming of this mode is: be subject to the influence of pressure oil seal leakage, the stability of the lasting holding position of piston rod is relatively poor, and precision is lower.Thereby common oil hydraulic cylinder can not be used for precision and the high field of reliability requirement, and extraordinary then oil hydraulic cylinder arises at the historic moment.
Chinese patent CN101576102 discloses a kind of mechanical self-locking hydraulic cylinder, comprise cylinder body, piston and piston rod, piston is divided into rod chamber and rodless cavity with cylinder body, in the described rodless cavity lock is installed, lock is sleeved on the guide pin bushing, guide pin bushing is fixedly mounted in the cylinder body, the spring that one end and lock offset is installed in the guide pin bushing, the base of the other end of spring and cylinder wall or guide pin bushing offsets, the outer surface of lock is provided with and the elasticity of the head band taper step that matches of the inner cylindrical surface of fork-shaped lock tube one end entad, entad the other end of fork-shaped lock tube links to each other with its piston that moves of drive, entad the inner conical step surface of the external conical shape step surface of fork-shaped lock tube and outer lock rings offsets, and outer lock rings is fixed in the cylinder body.
Chinese patent CN2661989 discloses a kind of self-locking oil hydraulic cylinder, it comprises cylinder body, piston, piston rod, cylinder cap and cylinder bottom, also comprise elastic thin-wall sleeve and front and back guide sleeve, wherein elasticity book wall sleeve is to be the outer surface that Spielpassung is set in piston rod, former and later two guide sleeves are located at the two ends of elasticity book wall sleeve, and at the two ends of book wall sleeve and the contact matching place between the cylinder body, and the contacting point between the front and back guide sleeve at book wall sleeve and its two ends all is equiped with seal ring, so that between book wall sleeve and inner surface of cylinder block, can form the volume of a sealing, when feed pressure oil in this enclosed volume after, resiliently deformable can take place to embrace and the latching ram bar in book wall sleeve under the effect of pressure oil.
Summary of the invention
The purpose of this utility model provide a kind of control accuracy higher, reliable and stable, simple in structure stretch out position self-locking type hydraulic cylinder.
The utility model is provided with cylinder barrel, front cover, rear end cover, tapered piston, main piston, piston rod, positioning ring, spring, steel ball, piston rod nut.
Cylinder barrel is provided with central through bore, and the cylinder barrel barrel is provided with oil inlet hole and oil outlet, and the cylinder barrel front inner wall is provided with groove, is used for snapping in of steel ball; Front cover is located at the cylinder barrel front end, and front cover is connected with cylinder barrel is removable, and front cover is made as interior empty shape, and the cylinder barrel rear end is provided with through hole, and the cylinder barrel front end is provided with the piston rod hole, the piston rod hole simultaneously as the piston rod guidance to cover; Positioning ring is located between cylinder barrel and the front cover, and its inner axle can position preceding cylinder barrel and back cylinder barrel simultaneously to external part is arranged, and positioning ring plays interconnect function simultaneously; Rear end cover is located at the cylinder barrel rear end and is connected with cylinder barrel is removable; Main piston is located in the cylinder barrel, the shaft axis of main piston overlaps with the shaft axis of the shaft axis of cylinder barrel, rear end cover and the shaft axis of tapered piston, main piston is provided with groove, the tapered end of being convenient to tapered piston stretches into, and symmetry is drilled with 2 holes on the external diameter of piston, and steel ball is located in these 2 radial holes, main piston is established center hole, piston rod is provided with annular boss and screw thread, and boss is used for the location of main piston, and piston rod nut is used for connecting of main piston and piston rod; Tapered piston is located in the front cover, and tapered piston is established through hole, and the rear end of piston is tapered, and its front end is withstood by retaining spring, and its thrust mouth is blocked by the front end of positioning ring, and tapered piston is provided with oilhole; Retaining spring is located at the inside of front cover, withstands the front end of tapered piston.
Described cylinder barrel front inner wall is provided with groove, and preferably the cylinder barrel front inner wall is provided with annular arc groove.
Described main piston is provided with groove, and preferably main piston is provided with the axial rings connected in star.
Described front cover preferably adopts positioning ring to connect with removable connection of cylinder barrel.
Described main piston preferably is provided with 2 cylindrical channels radially, deposits for steel ball.
Described cylinder barrel front end inboard preferably is provided with annular arc groove, and the diameter of circular arc is preferably identical with the diameter of steel ball, and steel ball can closely contact circular arc wall during chucking.
The rear end of described tapered piston is tapered, can promote steel ball toward radial motion, preferably has oilhole on the external diameter of tapered piston.
System preferably utilizes steel ball to carry out self-locking.
Working principle of the present utility model is as follows:
1) static state: cylinder barrel does not pass in and out pressure oil, and main piston rests on the cylinder barrel rearward end, and steel ball is compressed in radially in the cylindrical hole because of the restriction of cylinder barrel wall, and tapered piston is withstood by the thrust spring, and its thrust end is close to the front end of positioning ring.
2) locking process: oil inlet hole entrance pressure power oil behind the cylinder barrel, anterior oil return.Main piston and piston rod are turned right together and are advanced, when steel ball is run into the conical surface of tapered piston, because steel ball temporarily can't move radially outward, so promoting resistance that tapered piston overcomes the thrust spring turns right and advances, when steel ball can enter into the annular arc groove of cylinder barrel front end, the thrust spring has the trend that tapered piston is turned left and advanced that promotes, and then the conical surface of tapered piston pushes into steel ball the annular arc groove of cylinder barrel front end in cylindrical hole, the outer surface of final tapered piston and the annular arc groove of cylinder barrel front end just are stuck in steel ball wherein, thereby it is main piston is stuck, the position of piston rod is accurately fixed and reached the reliable state of accurate positioning stablity, realize tightly lock.
3) releasing process: the anterior oil inlet hole of cylinder barrel advances pressure oil, the rear portion oil return.Pressure oil enters through the anterior oil inlet hole of cylinder barrel, radial hole by tapered piston enters in tapered piston and the formed closed cavity of main piston, because main piston is pinned by steel ball, can not be moved to the left, therefore pressure oil moves right with regard to the resistance that promotes tapered piston and overcome the thrust spring, when the tapering part of tapered piston contacted with steel ball, steel ball was with regard to the oriented possibility of radially regaining.Again since the part that steel ball is absorbed in annular arc groove less than half spheroid not, pressure oil has the trend of main piston toward left movement that promotes again, therefore main piston just produces a component naturally, make steel ball break away from annular arc groove toward radially regaining, in steel ball all is recovered to the radially cylindrical hole of main piston, thereby the realization release, main piston continues left lateral.
The utility model has been owing to adopted above-mentioned mechanical locking device, the fixed-site of piston rod is lived and reaches accurate location, reliable and stable state.Only need to switch, just can realize lock and unlock by oil circuit, easy to operate and simple in structure.
Description of drawings
Fig. 1 is that the utility model embodiment's structure is formed schematic representation.
Fig. 2 is the utility model embodiment's a locking state schematic representation.
Embodiment
Referring to Fig. 1 and 2, the utility model embodiment is provided with rear end cover 1, bolt 2, cylinder barrel 4, main piston 5, steel ball 6, front cover 7, spring 8, tapered piston 9, piston rod 10, bolt 11, piston rod nut 25.
Claims (7)
1. stretch out position self-locking type hydraulic cylinder, it is characterized in that being provided with cylinder barrel, front cover, rear end cover, tapered piston, main piston, piston rod, positioning ring, spring, steel ball, piston rod nut;
Cylinder barrel is provided with central through bore, and the cylinder barrel barrel is provided with oil inlet hole and oil outlet, and the cylinder barrel front inner wall is provided with groove; Front cover is located at the cylinder barrel front end, and front cover is connected with cylinder barrel is removable, and front cover is made as interior empty shape, and the cylinder barrel rear end is provided with through hole, and the cylinder barrel front end is provided with the piston rod hole, and the piston rod hole is simultaneously as the piston rod guide sleeve; Positioning ring is located between cylinder barrel and the front cover, and its inner axle can position preceding cylinder barrel and back cylinder barrel simultaneously to external part is arranged; Rear end cover is located at the cylinder barrel rear end and is connected with cylinder barrel is removable; Main piston is located in the cylinder barrel, the shaft axis of main piston overlaps with the shaft axis of the shaft axis of cylinder barrel, rear end cover and the shaft axis of tapered piston, main piston is provided with groove, symmetry is drilled with 2 holes on the external diameter of piston, steel ball is located in these 2 radial holes, and main piston is established center hole, and piston rod is provided with annular boss and screw thread, boss is used for the location of main piston, and piston rod nut is used for connecting of main piston and piston rod; Tapered piston is located in the front cover, and tapered piston is established through hole, and the rear end of piston is tapered, and its front end is withstood by retaining spring, and its thrust mouth is blocked by the front end of positioning ring, and tapered piston is provided with oilhole; Retaining spring is located at the inside of front cover, withstands the front end of tapered piston.
2. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that described groove is annular arc groove.
3. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that described groove is the axial rings connected in star.
4. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that removable connection of described front cover and cylinder barrel adopting positioning ring to connect.
5. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that described main piston is provided with 2 cylindrical channels radially, deposits for steel ball.
6. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that described cylinder barrel front end inboard is provided with annular arc groove, and the diameter of circular arc is identical with the diameter of steel ball.
7. the position self-locking type hydraulic cylinder that stretches out as claimed in claim 1 is characterized in that being provided with oilhole on the external diameter of tapered piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201135840U CN201661543U (en) | 2010-02-09 | 2010-02-09 | Extending position self-locking type hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201135840U CN201661543U (en) | 2010-02-09 | 2010-02-09 | Extending position self-locking type hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661543U true CN201661543U (en) | 2010-12-01 |
Family
ID=43231959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201135840U Expired - Fee Related CN201661543U (en) | 2010-02-09 | 2010-02-09 | Extending position self-locking type hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661543U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518621A (en) * | 2011-12-20 | 2012-06-27 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Actuator cylinder position locking and unlocking mechanism |
| CN102817882A (en) * | 2012-09-14 | 2012-12-12 | 泸州市巨力液压有限公司 | Single-displacement locking oil cylinder |
| CN103089746A (en) * | 2013-01-23 | 2013-05-08 | 南宁燎旺车灯有限责任公司 | Intelligent mechanical self-locking hydraulic device |
| CN103148050A (en) * | 2011-12-06 | 2013-06-12 | 北京市三一重机有限公司 | Hydraulic cylinder and hydraulic system |
| CN103644782A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | Gunpowder actuator unlocking device |
| CN103899593A (en) * | 2014-03-31 | 2014-07-02 | 长治清华机械厂 | Automatic multi-level elastic ring locking hydraulic cylinder |
| CN104006033A (en) * | 2014-05-09 | 2014-08-27 | 中船重工中南装备有限责任公司 | Powerful and mechanical automatic-locking hydraulic cylinder |
| CN104006032A (en) * | 2014-05-09 | 2014-08-27 | 中船重工中南装备有限责任公司 | Two-direction mechanical locking hydraulic cylinder |
| CN104653551A (en) * | 2013-11-25 | 2015-05-27 | 深圳市海洋王照明工程有限公司 | Connecting rod locking device |
| CN104763706A (en) * | 2015-04-02 | 2015-07-08 | 中船重工中南装备有限责任公司 | Mechanical self-locking hydraulic cylinder |
| CN107558853A (en) * | 2017-09-04 | 2018-01-09 | 江西洪都航空工业集团有限责任公司 | A kind of cockpit cover opening mechanism |
| CN107630861A (en) * | 2016-11-28 | 2018-01-26 | 陈干惠 | A kind of safe self-locking oil cylinder being adjusted flexibly |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
| CN116080934A (en) * | 2023-04-12 | 2023-05-09 | 江苏深蓝航天有限公司 | Locking device, landing recovery device and aircraft |
-
2010
- 2010-02-09 CN CN2010201135840U patent/CN201661543U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148050A (en) * | 2011-12-06 | 2013-06-12 | 北京市三一重机有限公司 | Hydraulic cylinder and hydraulic system |
| CN103148050B (en) * | 2011-12-06 | 2017-01-25 | 北京市三一重机有限公司 | Hydraulic cylinder and hydraulic system |
| CN102518621A (en) * | 2011-12-20 | 2012-06-27 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Actuator cylinder position locking and unlocking mechanism |
| CN102817882A (en) * | 2012-09-14 | 2012-12-12 | 泸州市巨力液压有限公司 | Single-displacement locking oil cylinder |
| CN103089746A (en) * | 2013-01-23 | 2013-05-08 | 南宁燎旺车灯有限责任公司 | Intelligent mechanical self-locking hydraulic device |
| CN104653551A (en) * | 2013-11-25 | 2015-05-27 | 深圳市海洋王照明工程有限公司 | Connecting rod locking device |
| CN103644782A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | Gunpowder actuator unlocking device |
| CN103899593A (en) * | 2014-03-31 | 2014-07-02 | 长治清华机械厂 | Automatic multi-level elastic ring locking hydraulic cylinder |
| CN104006032A (en) * | 2014-05-09 | 2014-08-27 | 中船重工中南装备有限责任公司 | Two-direction mechanical locking hydraulic cylinder |
| CN104006033A (en) * | 2014-05-09 | 2014-08-27 | 中船重工中南装备有限责任公司 | Powerful and mechanical automatic-locking hydraulic cylinder |
| CN104006032B (en) * | 2014-05-09 | 2016-01-20 | 中船重工中南装备有限责任公司 | The locked oil hydraulic cylinder of a kind of two-way mechanical |
| CN104763706A (en) * | 2015-04-02 | 2015-07-08 | 中船重工中南装备有限责任公司 | Mechanical self-locking hydraulic cylinder |
| CN104763706B (en) * | 2015-04-02 | 2016-08-17 | 中船重工中南装备有限责任公司 | Mechanical self-locking hydraulic cylinder |
| CN107630861A (en) * | 2016-11-28 | 2018-01-26 | 陈干惠 | A kind of safe self-locking oil cylinder being adjusted flexibly |
| CN107630861B (en) * | 2016-11-28 | 2024-02-27 | 陈干惠 | Flexibly adjustable safety self-locking oil cylinder |
| CN107558853A (en) * | 2017-09-04 | 2018-01-09 | 江西洪都航空工业集团有限责任公司 | A kind of cockpit cover opening mechanism |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
| CN116080934A (en) * | 2023-04-12 | 2023-05-09 | 江苏深蓝航天有限公司 | Locking device, landing recovery device and aircraft |
| CN116080934B (en) * | 2023-04-12 | 2023-07-21 | 江苏深蓝航天有限公司 | Locking device, landing recovery device and aircraft |
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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: 20101201 Termination date: 20140209 |