CN1584349A - Rough symmetric double actuating surfaces hydraulic cylinder with single rod - Google Patents
Rough symmetric double actuating surfaces hydraulic cylinder with single rod Download PDFInfo
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- CN1584349A CN1584349A CN 200410024962 CN200410024962A CN1584349A CN 1584349 A CN1584349 A CN 1584349A CN 200410024962 CN200410024962 CN 200410024962 CN 200410024962 A CN200410024962 A CN 200410024962A CN 1584349 A CN1584349 A CN 1584349A
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Abstract
本发明公开了一种单出杆双作用面近似对称液压缸。缸底与内活塞杆的一端固连，活塞与活塞杆的一端固连，安装在缸筒与内活塞杆之间，内活塞杆的另一端与内活塞固连，内活塞与活塞杆内孔间为密封的滑动配合，活塞与缸筒间为密封的滑动配合，活塞杆与缸盖为密封的滑动配合；缸筒、活塞、内活塞杆、内活塞和缸底形成的a腔经A口与外部油路连通；由缸筒、活塞、活塞杆和缸盖形成的b腔经B口与外部油路连通；由内活塞、和活塞杆形成的t腔经T口通外部大气。本发明具有长行程、高稳定性、单出杆、液压缸两作用面的有效面积近似相等、液压缸具有双端缓冲能力的特点。它将对称液压缸和单出杆液压缸的优点很好的结合在一起，可在液压系统中广泛应用。
The invention discloses an approximately symmetrical hydraulic cylinder with a single rod and double acting surfaces. The cylinder bottom is fixedly connected with one end of the inner piston rod, the piston is fixedly connected with one end of the piston rod, installed between the cylinder barrel and the inner piston rod, the other end of the inner piston rod is fixedly connected with the inner piston, the inner piston is connected with the inner hole of the piston rod There is a sealed sliding fit between the piston and the cylinder, and a sealed sliding fit between the piston rod and the cylinder head; the cavity a formed by the cylinder, piston, inner piston rod, inner piston and cylinder bottom passes through the A port It communicates with the external oil circuit; the b chamber formed by the cylinder, piston, piston rod and cylinder head communicates with the external oil circuit through the B port; the t chamber formed by the inner piston and the piston rod communicates with the external atmosphere through the T port. The invention has the characteristics of long stroke, high stability, single output rod, approximately equal effective areas of the two acting surfaces of the hydraulic cylinder, and double-end buffering capacity of the hydraulic cylinder. It combines the advantages of symmetrical hydraulic cylinders and single-rod hydraulic cylinders well, and can be widely used in hydraulic systems.
Description
Affiliated technical field
The present invention relates to fluid pressure actuator, especially relate to a kind of single rod double-action face near symmetrical oil hydraulic cylinder.
Background technique
Oil hydraulic cylinder is the executive component that hydraulic pressure can be converted to straight line motion mechanical energy.Symmetrical hydraulic cylinder refers to that two acting surface areas of double-acting hydraulic cylinder equate, existing symmetrical hydraulic cylinder is generally two rods, and two active areas of asymmetric servo cylinder are then unequal, are asymmetrical cylinder.The double-acting symmetrical hydraulic cylinder of single rod of proposition was also arranged in the past, one of them acting surface is on inner piston rod (or claiming inner cylinder tube), during hydraulic cylinder works, inner piston rod (or claiming inner cylinder tube) bears very big pressure, when hydraulic cylinder travel is very long, in order to guarantee the structure stability of oil hydraulic cylinder, that the inner piston rod (or claiming inner cylinder tube) of oil hydraulic cylinder must be done is very thick, thereby when causing piston rod to move, the flow-rate ratio of system is bigger, and flow and stability are contradiction in this oil hydraulic cylinder.The present invention well combines the advantage of symmetrical hydraulic cylinder and asymmetric servo cylinder, and inner piston rod does not bear high pressure, and the diameter of the flow of oil hydraulic cylinder and inner piston rod is uncorrelated, well solved the contradiction of oil hydraulic cylinder flow and stability, it is relatively independent to have guaranteed to improve oil hydraulic cylinder raising stable and the oil hydraulic cylinder flow, propose a kind of double-action face near symmetrical oil hydraulic cylinder scheme of long stroke high stability, had long stroke, high stability, single rod, the useful area approximately equal of oil hydraulic cylinder two acting surfaces, oil hydraulic cylinder has the characteristics of both-end buffer capacity.Be a breakthrough of oil hydraulic cylinder technology, can extensive use in hydraulic system.
Summary of the invention
The purpose of this invention is to provide a kind of single rod double-action face near symmetrical oil hydraulic cylinder, have the characteristics of the useful area near symmetrical of long stroke, high stability, single rod, oil hydraulic cylinder two acting surfaces.
In order to achieve the above object, the technical solution used in the present invention is: comprise cylinder barrel, piston, piston rod, inner piston rod, inner carrier, cylinder bottom, cylinder cap; Wherein:
Cylinder bottom and inner piston rod one end are connected, piston one end boss can match with the groove of cylinder bottom, after one end of piston the other end boss and piston rod is connected, be installed between cylinder barrel and the inner piston rod, being slidingly matched for sealing between piston and cylinder barrel, have the groove that can match on the cylinder cap with another boss of piston, the other end of piston rod and the through hole on the cylinder cap are being slidingly matched of sealing and stretch out outside the cylinder barrel, the other end of inner piston rod is equipped with inner carrier, being slidingly matched for sealing between inner carrier and piston rod endoporus; The two ends, side of cylinder barrel have A mouth, B mouth, and the piston rod endoporus forms the T mouth, and a chamber that is formed by cylinder barrel, piston, piston rod, inner piston rod, inner carrier and cylinder bottom is communicated with outside oil circuit through the A mouth; The b chamber that is formed by cylinder barrel, piston, piston rod and cylinder cap is communicated with outside oil circuit through the B mouth; The t chamber that is formed by inner carrier, piston rod leads to outside atmosphere through the T mouth.
The present invention compares with background technique, the useful effect that has is: the advantage of symmetrical hydraulic cylinder and asymmetric servo cylinder is well combined, and inner piston rod does not bear high pressure, and the diameter of the flow of oil hydraulic cylinder and inner piston rod is uncorrelated, well solved the contradiction of oil hydraulic cylinder flow and stability, it is relatively independent to have guaranteed to improve oil hydraulic cylinder raising stable and the oil hydraulic cylinder flow, propose a kind of double-action face near symmetrical oil hydraulic cylinder scheme of long stroke high stability, had long stroke, high stability, single rod, the useful area near symmetrical of oil hydraulic cylinder two acting surfaces, oil hydraulic cylinder has the characteristics of both-end buffer capacity.Be a breakthrough of oil hydraulic cylinder technology, can extensive use in hydraulic system.
Description of drawings
Accompanying drawing is a structural principle schematic representation of the present invention.
Among the figure: 1 cylinder barrel, 2 pistons, 3 piston rods, 4 inner piston rods, 5 inner carriers, 6,7,8 seal rings, 9 cylinder bottoms, 10 cylinder caps, A, B mouth are oil inlet and outlet, the T mouth leads to atmosphere, two oil cylinder acting surfaces of I, II, a, b, three cavity volumes of t.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in drawings, the present invention includes cylinder barrel 1, piston 2, piston rod 3, inner piston rod 4, inner carrier 5, cylinder bottom 9, cylinder cap 10; Wherein:
Cylinder bottom 9 is connected with inner piston rod 4 one ends, piston 2 one end boss can match with the groove of cylinder bottom 9, after one end of piston 2 the other end boss and piston rod 3 is connected, be installed between cylinder barrel 1 and the inner piston rod 4,1 being slidingly matched of piston 2 and cylinder barrel for sealing, open the groove that energy matches with piston 2 another boss on the cylinder cap 10, through hole on the other end of piston rod 3 and the cylinder cap 10 is being slidingly matched of sealing and stretches out outside the cylinder barrel 1, the other end of inner piston rod 4 is equipped with inner carrier 5, being slidingly matched for sealing between inner carrier 5 and piston rod 3 endoporus; The two ends, side of cylinder barrel 1 have A mouth, B mouth, and piston rod 3 endoporus form the T mouth, and a chamber that is formed by cylinder barrel 1, piston 2, piston rod 3, inner piston rod 4, inner carrier 5 and cylinder bottom 9 is communicated with outside oil circuit through the A mouth; The b chamber that is formed by cylinder barrel 1, piston 2, piston rod 3 and cylinder cap 10 is communicated with outside oil circuit through the B mouth; The t chamber that is formed by inner carrier 5, piston rod 3 leads to outside atmosphere through the T mouth.
Between 3 in inner carrier 5 and piston rod, piston rod 3 and cylinder cap 10 mesopores, piston 2 and 1 of cylinder barrel be equipped with seal ring 6,7,8 respectively.
Working principle of the present invention is as follows:
Oil hydraulic cylinder has only an actuating rod, and promptly piston rod 3, two two sides that acting surface is a piston 2 of oil hydraulic cylinder--face I and face II, and the area with this two acting surface during the design oil hydraulic cylinder mates approximately equal, to realize the control performance of asymmetric cylinder.Inner piston rod 4 does not bear high pressure, and the diameter of inner piston rod 4 and piston rod 3 can directly not influence oil hydraulic cylinder active area size, so when design, can design inner piston rod 4 and piston rod 3 relatively thicker, guarantee that like this oil hydraulic cylinder has stronger stability, and the flow can not improve hydraulic cylinder works the time.
Inner carrier 5 not only has the effect of sealing and guiding, and as the fulcrum on inner piston rod 4 tops, has improved the stability of inner piston rod 4.
During work, the T mouth leads to atmosphere, and piston rod 3 stretches out in the process, the oil-feed of oil hydraulic cylinder A mouth, and the useful effect face I by a chamber promotes piston rod 3 and stretches out, and the B mouth is fuel-displaced, and the hydraulic oil in b chamber is discharged by the B mouth; In the piston rod 3 withdrawal processes, the oil-feed of oil hydraulic cylinder B mouth, hydraulic oil enters the b chamber, and by useful effect face II promotion piston rod 3 withdrawals in b chamber, the A mouth is fuel-displaced, and the hydraulic oil in a chamber is discharged through the A mouth.
When piston 2 moved near cylinder bottom 9, the damping mechanism of piston 2 and cylinder bottom 9 made piston 2 and piston rod 3 enter the oil hydraulic cylinder cushion stroke; When piston 2 moved near cylinder cap 10, the damping mechanism of piston 2 and cylinder cap 10 made piston 2 and piston rod 3 enter the oil hydraulic cylinder cushion stroke.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024962 CN1584349A (en) | 2004-06-04 | 2004-06-04 | Rough symmetric double actuating surfaces hydraulic cylinder with single rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024962 CN1584349A (en) | 2004-06-04 | 2004-06-04 | Rough symmetric double actuating surfaces hydraulic cylinder with single rod |
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| Publication Number | Publication Date |
|---|---|
| CN1584349A true CN1584349A (en) | 2005-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410024962 Pending CN1584349A (en) | 2004-06-04 | 2004-06-04 | Rough symmetric double actuating surfaces hydraulic cylinder with single rod |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913506A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Piston rod type hydraulic cylinder with internally-arranged ball hinge |
| CN106015168A (en) * | 2016-07-18 | 2016-10-12 | 天津优瑞纳斯液压机械有限公司 | Direct-drive electric symmetric hydraulic cylinder |
| CN106194890A (en) * | 2016-09-08 | 2016-12-07 | 北京精密机电控制设备研究所 | A kind of single rod double acting symmetrical hydraulic cylinder |
| CN106678122A (en) * | 2017-02-20 | 2017-05-17 | 合肥长源液压股份有限公司 | Child-mother differential hydraulic cylinder |
| CN112483504A (en) * | 2020-11-24 | 2021-03-12 | 华中科技大学 | Double-acting single-rod symmetrical hydraulic cylinder capable of balancing gravity |
-
2004
- 2004-06-04 CN CN 200410024962 patent/CN1584349A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913506A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Piston rod type hydraulic cylinder with internally-arranged ball hinge |
| CN102913506B (en) * | 2012-11-09 | 2015-12-09 | 浙江大学 | A kind of ball strand is built in piston rod type oil hydraulic cylinder |
| CN106015168A (en) * | 2016-07-18 | 2016-10-12 | 天津优瑞纳斯液压机械有限公司 | Direct-drive electric symmetric hydraulic cylinder |
| CN106194890A (en) * | 2016-09-08 | 2016-12-07 | 北京精密机电控制设备研究所 | A kind of single rod double acting symmetrical hydraulic cylinder |
| CN106194890B (en) * | 2016-09-08 | 2018-11-06 | 北京精密机电控制设备研究所 | A kind of list rod double acting symmetrical hydraulic cylinder |
| CN106678122A (en) * | 2017-02-20 | 2017-05-17 | 合肥长源液压股份有限公司 | Child-mother differential hydraulic cylinder |
| CN106678122B (en) * | 2017-02-20 | 2018-05-04 | 合肥长源液压股份有限公司 | A kind of primary and secondary differential hydro cylinder |
| CN112483504A (en) * | 2020-11-24 | 2021-03-12 | 华中科技大学 | Double-acting single-rod symmetrical hydraulic cylinder capable of balancing gravity |
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