CN101893016A - Combined bidirectional long-stroke push-and-pull hydraulic cylinder - Google Patents
Combined bidirectional long-stroke push-and-pull hydraulic cylinder Download PDFInfo
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- CN101893016A CN101893016A CN 201010231707 CN201010231707A CN101893016A CN 101893016 A CN101893016 A CN 101893016A CN 201010231707 CN201010231707 CN 201010231707 CN 201010231707 A CN201010231707 A CN 201010231707A CN 101893016 A CN101893016 A CN 101893016A
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Abstract
The invention discloses a combined bidirectional long-stroke push-and-pull hydraulic cylinder, which comprises an external cylinder and an internal cylinder. The external cylinder comprises an external cylinder barrel, an external cylinder lug, an external cylinder piston and an external cylinder piston rod, wherein the external cylinder piston is movably arranged in the external cylinder barrel; one end of the external cylinder piston rod is fixed on the external cylinder piston while the other end is fixedly connected with the external cylinder lug; and the external cylinder barrel is hermetically connected with the external cylinder piston rod. The internal cylinder comprises an internal cylinder barrel, an internal cylinder piston and an internal cylinder piston rod, wherein the internal cylinder barrel is arranged in the external cylinder piston rod; the bottom of the internal cylinder barrel is adjacent to the external cylinder lug; the internal cylinder piston is movably arranged in the internal cylinder barrel; one end of the internal piston rod is fixed on the internal cylinder piston, and the internal cylinder barrel is hermetically connected with the internal cylinder piston rod; and the external cylinder barrel is fixedly connected with the internal cylinder barrel. Because the axial size of the combined bidirectional long-stroke push-and-pull hydraulic cylinder is reduced by 40 percent, a structure of a drilling machine is compact and the combined bidirectional long-stroke push-and-pull hydraulic cylinder is particularly suitable to be applied to environments of tunnels and coal mine galleries, can make the pull-back force meet the requirements, shorten the length of a stand of the drilling machine and lighten the weight, and is flexible and convenient to move.
Description
Technical field
What the present invention relates to is a kind of rig oil hydraulic cylinder, relates in particular to a kind of combined bidirectional long-stroke push-and-pull hydraulic cylinder.
Background technique
Oil hydraulic cylinder is the important process element that advances drilling rod in rig when work, and the stroke of oil hydraulic cylinder is by the length decision of drilling rod, and for common double-action single-stage cylinder, the stroke of oil hydraulic cylinder has determined initial length of installation and the frame length and even the main frame length of oil hydraulic cylinder.The frame length of present all kinds of rigs all is subjected to the restriction of oil hydraulic cylinder length.Especially in usage space circumscribed occasion is arranged, long stroke, short initial length oil hydraulic cylinder are that all kinds of rigs press for.Though existing twin-stage cylinder stroke is long, because the twin-stage cylinder structure limits, retracting force is too little can not to be satisfied rig far away and returns the needs that drag drilling rod, so the application of twin-stage cylinder is restricted on rig.
Summary of the invention
Goal of the invention: the objective of the invention is to overcome the deficiencies in the prior art, a kind of combined bidirectional long-stroke push-and-pull hydraulic cylinder is provided, by the position relative fixed with inner cylinder tube and outer cylinder, interior outer cylinder body reversing motion has realized that equipment integral axially reduces and stroke is constant or increase.
Technological scheme: the present invention is achieved by the following technical solutions, the present invention includes outer cylinder body and inner cylinder body, described outer cylinder body comprises outer cylinder, outer shell ear, outer shell piston and internal cylinder piston rod, wherein: the activity of outer shell piston is located in the outer cylinder, internal cylinder piston rod one end is fixed on the outer shell piston, the other end and outer shell ear are fixedly linked, and sealing links to each other outer cylinder with internal cylinder piston rod; Described inner cylinder body comprises inner cylinder tube, inner casing piston and interior cylinder piston rod, wherein: inner cylinder tube is located in the internal cylinder piston rod, the bottom of inner cylinder tube is adjacent with the outer shell ear, the activity of inner casing piston is located in the inner cylinder tube, interior cylinder piston rod one end is fixed on the inner casing piston, and rod seal links to each other inner cylinder tube with inner casing; Described outer cylinder and inner cylinder tube are fixedly linked.
Described internal cylinder piston rod is the box type piston bar, and inner cylinder tube is located at the hollow parts of internal cylinder piston rod, both can reduce integral device volume more can reduce the axial length of whole oil hydraulic cylinder.
In order to get rid of air left in the oil hydraulic cylinder, described outer shell ear is provided with vent.
Described outer cylinder is provided with first hydraulic fluid port and second hydraulic fluid port, and wherein: the rod chamber of first hydraulic fluid port and outer cylinder body links to each other, and the rodless cavity of second hydraulic fluid port and outer cylinder body links to each other; Cylinder piston rod is provided with the 3rd hydraulic fluid port and the 4th hydraulic fluid port in described, and wherein: the rod chamber of the 3rd hydraulic fluid port and inner cylinder body links to each other, and the rodless cavity of the 4th hydraulic fluid port and inner cylinder body links to each other.
Described outer cylinder is provided with upper saw pulley, and upper saw pulley plays the balancing gravity effect when oil cylinder stretches out, to avoid the oil cylinder center curvature.
The area of the cross section of the rodless cavity of described inner cylinder body and outer cylinder body equates that the area of the cross section of the rod chamber of inner cylinder body and outer cylinder body equates.
Described first hydraulic fluid port links to each other by oil pipe with the 3rd hydraulic fluid port, and second hydraulic fluid port links to each other by oil pipe with the 4th hydraulic fluid port.
When the present invention worked: in the hydraulic cylinder works process, inner cylinder tube and outer cylinder did not have axial relative movement; When hydraulic oil entered the rodless cavity of inside and outside cylinder body, internal cylinder piston rod and interior cylinder piston rod stretched out the generation propelling force respectively round about; When hydraulic oil enters the rod chamber of inside and outside cylinder, inside and outside cylinder piston rod is inwardly withdrawn respectively and is produced retracting force, the sectional area of the annular effect of the rod chamber of outer cylinder body and inner cylinder body and rodless cavity equates respectively, and therefore, the pushing away of inside and outside oil hydraulic cylinder, pulling force also equate respectively.
Beneficial effect: the present invention compares with general single-stage double-acting hydraulic cylinder, same stroke, axial dimension will lack 40%, uses this oil cylinder can shorten frame length in rig, make the structure of rig become compact, adapt to more under the environment in tunnel, tunnel, colliery and use.Realized that the long stroke of oil hydraulic cylinder is short, initial length is short; And pull-back force can be satisfied the demand; Use this oil hydraulic cylinder can make borer frame shorten length, weight saving; Move flexible.
Description of drawings
Fig. 1 is a work schematic representation of the present invention;
Fig. 2 is a structural representation of the present invention.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, present embodiment comprises outer cylinder body and inner cylinder body, described outer cylinder body comprises outer cylinder 1, outer shell ear 2, outer shell piston 3 and internal cylinder piston rod 4, wherein: 3 activities of outer shell piston are located in the outer cylinder 1, internal cylinder piston rod 4 one ends are fixed on the outer shell piston 3, the other end and outer shell ear 2 are fixedly linked, and 4 sealings link to each other outer cylinder 1 with internal cylinder piston rod;
Described inner cylinder body comprises inner cylinder tube 5, inner casing piston 6 and interior cylinder piston rod 7, wherein: inner cylinder tube 5 is located in the internal cylinder piston rod 4, the bottom of inner cylinder tube 5 is adjacent with outer shell ear 2,6 activities of inner casing piston are located in the inner cylinder tube 5, interior cylinder piston rod 7 one ends are fixed on the inner casing piston 6, and inner cylinder tube 5 links to each other with interior cylinder piston rod 7 sealings;
Described outer cylinder 1 links to each other by outer cylinder cap 8 sealings with internal cylinder piston rod 4, and described inner cylinder tube 5 links to each other by interior cylinder cap 9 sealings with interior cylinder piston rod 7;
Described outer cylinder 1 and inner cylinder tube 5 are fixedly linked by screw thread.
Described internal cylinder piston rod 4 is box type piston bars, and inner cylinder tube 5 is located at the hollow parts of internal cylinder piston rod 4, both can reduce integral device volume more can reduce the axial length of whole oil hydraulic cylinder.
Described outer shell ear 2 is provided with vent 10, can get rid of air left in the oil hydraulic cylinder.
Described outer cylinder 1 is provided with first hydraulic fluid port 11 and second hydraulic fluid port 12, and wherein: the rod chamber of first hydraulic fluid port 11 and outer cylinder body links to each other, and the rodless cavity of second hydraulic fluid port 12 and outer cylinder body links to each other;
Cylinder piston rod 7 is provided with the 3rd hydraulic fluid port 13 and the 4th hydraulic fluid port 14 in described, and wherein: the rod chamber of the 3rd hydraulic fluid port 13 and inner cylinder body links to each other, and the rodless cavity of the 4th hydraulic fluid port 14 and inner cylinder body links to each other.
Described outer cylinder 1 is provided with upper saw pulley 15, and upper saw pulley 15 plays the balancing gravity effect when oil cylinder stretches out, to avoid the oil cylinder center curvature.
The area of the cross section of the rodless cavity of described inner cylinder body and outer cylinder body equates that the area of the cross section of the rod chamber of inner cylinder body and outer cylinder body equates.
Described first hydraulic fluid port 11 links to each other by oil pipe with the 3rd hydraulic fluid port 13, and second hydraulic fluid port 12 links to each other by oil pipe with the 4th hydraulic fluid port 14.
When hydraulic oil entered the rodless cavity of inside and outside cylinder body, internal cylinder piston rod 4 and interior cylinder piston rod 7 stretched out the generation propelling force respectively round about; When hydraulic oil enters the rod chamber of inside and outside cylinder, inside and outside cylinder piston rod 4 is inwardly withdrawn respectively and is produced retracting force, because the sectional area of the rod chamber of outer cylinder body and inner cylinder body and the annular effect of rodless cavity equates respectively, therefore, the pushing away of inside and outside oil hydraulic cylinder, pulling force also equate respectively.
Claims (7)
1. combined bidirectional long-stroke push-and-pull hydraulic cylinder, comprise outer cylinder body and inner cylinder body, it is characterized in that: described outer cylinder body comprises outer cylinder (1), outer shell ear (2), outer shell piston (3) and internal cylinder piston rod (4), wherein: outer shell piston (3) activity is located in the outer cylinder (1), internal cylinder piston rod (4) one ends are fixed on the outer shell piston (3), the other end and outer shell ear (2) are fixedly linked, and sealing links to each other outer cylinder (1) with internal cylinder piston rod (4);
Described inner cylinder body comprises inner cylinder tube (5), inner casing piston (6) and interior cylinder piston rod (7), wherein: inner cylinder tube (5) is located in the internal cylinder piston rod (4), the bottom of inner cylinder tube (5) is adjacent with outer shell ear (2), inner casing piston (6) activity is located in the inner cylinder tube (5), interior cylinder piston rod (7) one ends are fixed on the inner casing piston (6), and sealing links to each other inner cylinder tube (5) with interior cylinder piston rod (7);
Described outer cylinder (1) and inner cylinder tube (5) are fixedly linked.
2. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 1 is characterized in that: described internal cylinder piston rod (4) is the box type piston bar, and inner cylinder tube (5) is located at the hollow parts of internal cylinder piston rod (4).
3. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 1 is characterized in that: described outer shell ear (2) is provided with vent (10).
4. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 1, it is characterized in that: described outer cylinder (1) is provided with first hydraulic fluid port (11) and second hydraulic fluid port (12), wherein: the rod chamber of first hydraulic fluid port (11) and outer cylinder body links to each other, and the rodless cavity of second hydraulic fluid port (12) and outer cylinder body links to each other;
Cylinder piston rod (7) is provided with the 3rd hydraulic fluid port (13) and the 4th hydraulic fluid port (14) in described, and wherein: the rod chamber of the 3rd hydraulic fluid port (13) and inner cylinder body links to each other, and the rodless cavity of the 4th hydraulic fluid port (14) and inner cylinder body links to each other.
5. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 1 is characterized in that: described outer cylinder (1) is provided with upper saw pulley (15).
6. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 4 is characterized in that: the area of the cross section of the rodless cavity of described inner cylinder body and outer cylinder body equates that the area of the cross section of the rod chamber of inner cylinder body and outer cylinder body equates.
7. combined bidirectional long-stroke push-and-pull hydraulic cylinder according to claim 4 is characterized in that: described first hydraulic fluid port (11) links to each other by oil pipe with the 3rd hydraulic fluid port (13), and second hydraulic fluid port (12) links to each other by oil pipe with the 4th hydraulic fluid port (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010231707 CN101893016A (en) | 2010-07-20 | 2010-07-20 | Combined bidirectional long-stroke push-and-pull hydraulic cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010231707 CN101893016A (en) | 2010-07-20 | 2010-07-20 | Combined bidirectional long-stroke push-and-pull hydraulic cylinder |
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| CN101893016A true CN101893016A (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010231707 Pending CN101893016A (en) | 2010-07-20 | 2010-07-20 | Combined bidirectional long-stroke push-and-pull hydraulic cylinder |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529636A (en) * | 2012-01-19 | 2012-07-04 | 太原科技大学 | Hydraulic damping balanced type swing axle device for loading machine |
| CN102788061A (en) * | 2012-08-30 | 2012-11-21 | 中国地质科学院勘探技术研究所 | Low-flow fast movable cylinder |
| CN103343763A (en) * | 2013-07-30 | 2013-10-09 | 煤炭科学研究总院 | Bidirectional single-flexible hydraulic cylinder |
| CN108591165A (en) * | 2018-05-15 | 2018-09-28 | 四川长江液压天成机械有限公司 | A kind of compact dual-rod hydraulic cylinder |
| CN110651128A (en) * | 2016-08-05 | 2020-01-03 | 伍德沃德有限公司 | Multi-chamber rotary piston actuator |
| CN111366365A (en) * | 2020-03-25 | 2020-07-03 | 南京汽车集团有限公司 | Automobile rear axle assembly torsion fatigue test device |
| US10954973B2 (en) | 2017-07-14 | 2021-03-23 | Woodward, Inc. | Unsupported piston with moving seal carrier |
| CN112938790A (en) * | 2021-01-27 | 2021-06-11 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic arm of crane |
| CN113738737A (en) * | 2021-09-10 | 2021-12-03 | 于化奇 | Oil cylinder |
| CN113738738A (en) * | 2021-09-29 | 2021-12-03 | 西安航空学院 | Bidirectional quick hydraulic cylinder |
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| CN101092982A (en) * | 2007-07-27 | 2007-12-26 | 韩顺和 | Boosting oil cylinder |
| CN201747695U (en) * | 2010-07-20 | 2011-02-16 | 王思聪 | Combined two-way long-stroke push-and-pull hydraulic cylinder |
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Patent Citations (6)
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| DE2658488A1 (en) * | 1976-12-23 | 1978-06-29 | Emil Miller | Double acting piston operating system - has piston movable in cylinder which forms ring piston in outer chamber, with selective fluid supply to two chambers |
| AU9175882A (en) * | 1981-12-23 | 1983-06-30 | Pitic, D.A. | Compound hydraulic cylinder |
| CN1043365A (en) * | 1988-12-14 | 1990-06-27 | 北京矿务局机械设计研究所 | The combined oil cylinder that is used for support apparatus in coal mine |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529636A (en) * | 2012-01-19 | 2012-07-04 | 太原科技大学 | Hydraulic damping balanced type swing axle device for loading machine |
| CN102788061A (en) * | 2012-08-30 | 2012-11-21 | 中国地质科学院勘探技术研究所 | Low-flow fast movable cylinder |
| CN103343763A (en) * | 2013-07-30 | 2013-10-09 | 煤炭科学研究总院 | Bidirectional single-flexible hydraulic cylinder |
| US11391305B2 (en) | 2016-08-05 | 2022-07-19 | Woodward, Inc. | Multi-chamber rotary piston actuator |
| US11280356B2 (en) | 2016-08-05 | 2022-03-22 | Woodward, Inc. | Multi-axis rotary piston actuator |
| US12012976B2 (en) | 2016-08-05 | 2024-06-18 | Woodward, Inc. | Multi-axis rotary piston actuator |
| US10883522B2 (en) | 2016-08-05 | 2021-01-05 | Woodward. Inc. | Multi-chamber rotary piston actuator |
| CN110651128A (en) * | 2016-08-05 | 2020-01-03 | 伍德沃德有限公司 | Multi-chamber rotary piston actuator |
| US11512719B2 (en) | 2017-07-14 | 2022-11-29 | Woodward, Inc. | Unsupported piston with moving seal carrier |
| US10954973B2 (en) | 2017-07-14 | 2021-03-23 | Woodward, Inc. | Unsupported piston with moving seal carrier |
| CN108591165A (en) * | 2018-05-15 | 2018-09-28 | 四川长江液压天成机械有限公司 | A kind of compact dual-rod hydraulic cylinder |
| CN111366365A (en) * | 2020-03-25 | 2020-07-03 | 南京汽车集团有限公司 | Automobile rear axle assembly torsion fatigue test device |
| CN112938790A (en) * | 2021-01-27 | 2021-06-11 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic arm of crane |
| CN112938790B (en) * | 2021-01-27 | 2023-06-13 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic boom of crane |
| CN113738737A (en) * | 2021-09-10 | 2021-12-03 | 于化奇 | Oil cylinder |
| CN113738737B (en) * | 2021-09-10 | 2023-11-24 | 浙江弘创液压科技有限公司 | Oil cylinder |
| CN113738738A (en) * | 2021-09-29 | 2021-12-03 | 西安航空学院 | Bidirectional quick hydraulic cylinder |
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Application publication date: 20101124 |