CN204436938U - Double-acting self locking oil hydraulic cylinder - Google Patents
Double-acting self locking oil hydraulic cylinder Download PDFInfo
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- CN204436938U CN204436938U CN201520065993.0U CN201520065993U CN204436938U CN 204436938 U CN204436938 U CN 204436938U CN 201520065993 U CN201520065993 U CN 201520065993U CN 204436938 U CN204436938 U CN 204436938U
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Abstract
This double-acting self locking oil hydraulic cylinder, comprise cylinder barrel, be seal-installed on the bottom of cylinder barrel lower end and seal the piston rod sliding and be plugged in cylinder barrel, described piston rod is cylindrical, is provided with piston II bottom it, its top seal is fixed with upper cover, and vertical rod is vertically arranged in cylinder barrel.When cylinder jacking operates, by controlling selector valve, hydraulic oil is made to enter in cavity volume I and cavity volume III by oil-way system, it produces the upwardly power to piston II in cavity volume I, in cavity volume III, produce the upwardly power to upper cover, thus make cylinder piston rod upwards jacking under the acting in conjunction of two power.Can be locked by mechanical self-locking device after jacking to specified position, the position of piston rod is fixed, prevent piston rod rollback.Hydraulic oil enters cavity volume II by oil-way system, and now hydraulic oil produces the downward Driving force of piston II, thus makes piston rod rollback.Therefore this double-acting self locking oil hydraulic cylinder makes the top lift of oil cylinder greatly improve under the condition not increasing cylinder diameter.
Description
Technical field
The utility model relates to hydraulic system technical field, is specifically related to a kind of double-acting self locking oil hydraulic cylinder.
Background technique
Bridge equipment needs use oil hydraulic cylinder to carry out jacking, due to the long-term supporting structure of needs, so need to possess mechanical self-latching function.Be that hydraulic coupling jacking piston rod rises in cylinder jacking process, after equipment jacking puts in place, namely by screw thread, piston rod and cylinder barrel locked with self-locking nut, now transfer mechanical mechanism to stressed.
Common double-acting self locking hydraulic cylinder, the scheme realizing double-action and mechanical self-latching has two kinds.One is lengthened by piston rod, and piston rod is grouped into by not threaded section and threaded portion, and on cylinder barrel installation bearing seat, after piston rod stretches out, self-locking nut by screw thread by piston rod and supporting base locking; Another kind is cushioning anchor ear supporting between self-locking nut and cylinder barrel.
The first scheme, under identical range demands, significantly can increase the height of oil cylinder body, gain in weight and manufacture cost, can not use when restricted to oil cylinder elemental height; First scheme, each operation all needs manually to mount and dismount anchor ear, and operation is inconvenience very.
Summary of the invention
The utility model is in order to overcome the deficiency of above technology, and providing a kind ofly increases top lift when oil cylinder cylinder diameter is constant and the safe and reliable double-acting self locking oil hydraulic cylinder of self-locking structure.
The utility model overcomes the technological scheme that its technical problem adopts:
This double-acting self locking oil hydraulic cylinder, comprise cylinder barrel, be seal-installed on the bottom of cylinder barrel lower end and seal the piston rod sliding and be plugged in cylinder barrel, described piston rod is cylindrical, piston II is provided with bottom it, its top seal is fixed with upper cover, vertical rod is vertically arranged in cylinder barrel, described piston II seals flip sleeve and is loaded in vertical rod, the top of described vertical rod is fixed with piston I, described piston I seals slip and is plugged in piston rod, cavity volume I is formed in described cylinder barrel between piston II and bottom, cavity volume II is formed in described piston rod between piston I and piston II, cavity volume III is formed in described piston rod between piston I and upper cover, described piston rod is provided with mechanical self-locking device, it prevents piston rod rollback, oil-way system respectively with cavity volume I, cavity volume II and cavity volume III are connected, when cavity volume I and cavity volume III logical oil, cavity volume II draining, when cavity volume II logical oil, cavity volume I and cavity volume III draining.
Above-mentioned oil-way system comprises and is arranged at hydraulic fluid port A on bottom and hydraulic fluid port B, described hydraulic fluid port A is communicated with cavity volume I through oil duct I, described vertical rod is respectively arranged with oil duct II and oil duct III, described oil duct II one end is communicated with cavity volume I, its the other end is communicated with cavity volume III, described oil duct III one end is connected with hydraulic fluid port B, and its other end is communicated with cavity volume II.
Above-mentioned mechanical self-locking device comprises the outside thread being arranged at piston rod outer end and the nut be combined on piston rod.
In order to improve Security further, also comprise the unloading valve be installed on piston II, when piston I oil pressure run in piston rod in lower dead centre or cavity volume II exceedes unloading valve pressure set points, unloading valve is opened cavity volume I and cavity volume II conducting.
The beneficial effects of the utility model are: when cylinder jacking operates, by controlling selector valve, hydraulic oil is made to enter in cavity volume I and cavity volume III by oil-way system, it produces the upwardly power to piston II in cavity volume I, in cavity volume III, produce the upwardly power to upper cover, thus make cylinder piston rod upwards jacking under the acting in conjunction of two power.Can be locked by mechanical self-locking device after jacking to specified position, the position of piston rod is fixed, prevent piston rod rollback.When oil cylinder backhaul declines, by controlling selector valve, make hydraulic oil enter cavity volume II by oil-way system, now hydraulic oil produces the downward Driving force of piston II, thus makes piston rod rollback.Therefore this double-acting self locking oil hydraulic cylinder makes the top lift of oil cylinder greatly improve under the condition not increasing cylinder diameter, saves manufacture cost.
Accompanying drawing explanation
Fig. 1 is that master of the present utility model looks cross-sectional view;
In figure, 1. cylinder barrel 2. piston rod 3. bottom 4. upper cover 5. vertical rod 6. hydraulic fluid port A 7. hydraulic fluid port B 8. oil duct I 9. oil duct II 10. oil duct III 11. piston I 12. nut 13. cavity volume I 14. cavity volume II 15. cavity volume III 16. piston II 17. unloading valve.
Embodiment
Be described further below in conjunction with accompanying drawing 1 pair of the utility model.
This double-acting self locking oil hydraulic cylinder, comprise cylinder barrel 1, be seal-installed on the bottom 3 of cylinder barrel 1 lower end and seal the piston rod 2 sliding and be plugged in cylinder barrel 1, piston rod 2 is cylindrical, piston II 16 is provided with bottom it, its top seal is fixed with upper cover 4, vertical rod 5 is vertically arranged in cylinder barrel 1, piston II 16 seals flip sleeve and is loaded in vertical rod 5, the top of vertical rod 5 is fixed with piston I 11, piston I 11 seals slip and is plugged in piston rod 2, cavity volume I 13 is formed in cylinder barrel 1 between piston II 16 and bottom 3, cavity volume II 14 is formed in piston rod 2 between piston I 11 and piston II 16, cavity volume III 15 is formed in piston rod 2 between piston I 11 and upper cover 4, piston rod 2 is provided with mechanical self-locking device, it prevents piston rod 2 rollback, oil-way system respectively with cavity volume I 13, cavity volume II 14 and cavity volume III 15 are connected, when cavity volume I 13 and cavity volume III 15 logical oil, cavity volume II 14 draining, when cavity volume II 14 logical oil, cavity volume I 13 and cavity volume III 15 draining.When cylinder jacking operates, by controlling selector valve, hydraulic oil is made to enter in cavity volume I 13 and cavity volume III 15 by oil-way system, it produces the upwardly power to piston II 16 in cavity volume I 13, in cavity volume III 15, produce the upwardly power to upper cover 4, thus make cylinder piston rod 2 upwards jacking under the acting in conjunction of two power.Can be locked by mechanical self-locking device after jacking to specified position, the position of piston rod 2 is fixed, prevent piston rod 2 rollback.When oil cylinder backhaul declines, by controlling selector valve, make hydraulic oil enter cavity volume II 14 by oil-way system, now hydraulic oil produces the downward Driving force of piston II 16, thus makes piston rod 2 rollback.Therefore this double-acting self locking oil hydraulic cylinder makes the top lift of oil cylinder greatly improve under the condition not increasing cylinder diameter, saves manufacture cost.
Oil-way system can be following structure, it comprises and is arranged at hydraulic fluid port A 6 on bottom 3 and hydraulic fluid port B 7, hydraulic fluid port A 6 is communicated with cavity volume I 13 through oil duct I 8, vertical rod 5 is respectively arranged with oil duct II 9 and oil duct III 10, oil duct II 9 one end is communicated with cavity volume I 13, its the other end is communicated with cavity volume III 15, and oil duct III 10 one end is connected with hydraulic fluid port B 7, and its other end is communicated with cavity volume II 14.When hydraulic fluid port A 6 oil-feed, it enters cavity volume I 13 by I 8, and therefore it promotes piston II 16 and moves upward, thus piston rod 2 is stretched out.Hydraulic oil simultaneously in cavity volume I 13 enters cavity volume III 15 by oil duct II 9, thus promotes upper cover 4, thus achieves two cavity volume actings in conjunction.And the hydraulic oil of piston rod 2 in the process moved upward in cavity volume II 14 is discharged by oil duct III 10.Contrary to piston rod 2 moves back motion to the Huis, oil-feed in hydraulic fluid port B 7, hydraulic oil enters cavity volume II 14 by oil duct III 10 and therefore produces the downward active force of piston II 16, thus piston rod 2 is moved downward.Hydraulic oil now in cavity volume III 15 enters cavity volume I 13 by oil duct II 9, and the hydraulic oil in final cavity volume I 13 flows out off-load by oil duct I 8.
Mechanical self-locking device comprises the outside thread being arranged at piston rod 2 outer end and the nut 12 be combined on piston rod 2.When upwards jacking puts in place piston rod 2, be rotated down by nut 12, make it contact with cylinder barrel 1 upper end, thus can guarantee when oil cylinder pressure release, piston rod 2 also can not rollback, and structure is simple, easy to use.
Can also comprise the unloading valve 17 be installed on piston II 16, when piston I 11 oil pressure run in piston rod 2 in lower dead centre or cavity volume II 14 exceedes unloading valve 17 pressure set points, unloading valve 17 is opened cavity volume I 13 and cavity volume II 14 conducting.Now the hydraulic oil of cavity volume II 14 flows in cavity volume I 13 and realizes off-load, thus protection the stressed of vertical rod 5 is no more than design load, thus has ensured the safety of oil cylinder self structure.
Claims (4)
1. a double-acting self locking oil hydraulic cylinder, comprise cylinder barrel (1), the bottom (3) and the sealing slip that are seal-installed on cylinder barrel (1) lower end are plugged in piston rod (2) in cylinder barrel (1), it is characterized in that: described piston rod (2) is cylindrical, piston II (16) is provided with bottom it, its top seal is fixed with upper cover (4), vertical rod (5) is vertically arranged in cylinder barrel (1), described piston II (16) seals flip sleeve and is loaded in vertical rod (5), the top of described vertical rod (5) is fixed with piston I (11), described piston I (11) seals slip and is plugged in piston rod (2), be positioned between piston II (16) and bottom (3) and form cavity volume I (13) in described cylinder barrel (1), be positioned between piston I (11) and piston II (16) and form cavity volume II (14) in described piston rod (2), be positioned between piston I (11) and upper cover (4) and form cavity volume III (15) in described piston rod (2), (2) are provided with mechanical self-locking device to described piston rod, it prevents piston rod (2) rollback, oil-way system respectively with cavity volume I (13), cavity volume II (14) and cavity volume III (15) are connected, when cavity volume I (13) and cavity volume III (15) logical oil, cavity volume II (14) draining, when cavity volume II (14) logical oil, cavity volume I (13) and cavity volume III (15) draining.
2. double-acting self locking oil hydraulic cylinder according to claim 1, it is characterized in that: described oil-way system comprises the hydraulic fluid port A(6 be arranged on bottom (3)) and hydraulic fluid port B(7), described hydraulic fluid port A(6) be communicated with cavity volume I (13) through oil duct I (8), described vertical rod (5) is respectively arranged with oil duct II (9) and oil duct III (10), described oil duct II (9) one end is communicated with cavity volume I (13), its the other end is communicated with cavity volume III (15), described oil duct III (10) one end and hydraulic fluid port B(7) be connected, its other end is communicated with cavity volume II (14).
3. double-acting self locking oil hydraulic cylinder according to claim 1 and 2, is characterized in that: described mechanical self-locking device comprises the outside thread being arranged at piston rod (2) outer end and the nut (12) be combined on piston rod (2).
4. double-acting self locking oil hydraulic cylinder according to claim 2, it is characterized in that: also comprise the unloading valve (17) be installed on piston II (16), when piston I (11) oil pressure run in piston rod (2) in lower dead centre or cavity volume II (14) exceedes unloading valve (17) pressure set points, unloading valve (17) is opened cavity volume I (13) and cavity volume II (14) conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065993.0U CN204436938U (en) | 2015-01-30 | 2015-01-30 | Double-acting self locking oil hydraulic cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065993.0U CN204436938U (en) | 2015-01-30 | 2015-01-30 | Double-acting self locking oil hydraulic cylinder |
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| CN204436938U true CN204436938U (en) | 2015-07-01 |
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| CN201520065993.0U Active CN204436938U (en) | 2015-01-30 | 2015-01-30 | Double-acting self locking oil hydraulic cylinder |
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| CN (1) | CN204436938U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523459A (en) * | 2016-10-10 | 2017-03-22 | 合肥协力液压科技有限公司 | Hydraulic cylinder |
| CN106696988A (en) * | 2017-01-24 | 2017-05-24 | 哈尔滨市特多佳调速技术开发中心 | Safety unloading retarder |
| CN106837926A (en) * | 2016-12-28 | 2017-06-13 | 长沙中联消防机械有限公司 | Hydraulic cylinder, hydraulic circuit and fire fighting truck |
| CN107288949A (en) * | 2017-06-21 | 2017-10-24 | 马峰 | A kind of hydraulic booster |
| CN107630857A (en) * | 2017-11-09 | 2018-01-26 | 北京公联洁达公路养护工程有限公司 | Double action strip is servo-actuated mechanical lock oil cylinder |
| CN108050123A (en) * | 2017-11-29 | 2018-05-18 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN108757638A (en) * | 2018-06-11 | 2018-11-06 | 江苏万川高压电气有限公司 | The tight boosting hydraulic cylinder of servo-actuated self-locking |
| CN117605732A (en) * | 2024-01-19 | 2024-02-27 | 莱州市金恒达机械有限公司 | Hydraulic cylinder |
| CN117605732B (en) * | 2024-01-19 | 2024-04-09 | 莱州市金恒达机械有限公司 | Hydraulic cylinder |
-
2015
- 2015-01-30 CN CN201520065993.0U patent/CN204436938U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523459A (en) * | 2016-10-10 | 2017-03-22 | 合肥协力液压科技有限公司 | Hydraulic cylinder |
| CN106837926A (en) * | 2016-12-28 | 2017-06-13 | 长沙中联消防机械有限公司 | Hydraulic cylinder, hydraulic circuit and fire fighting truck |
| CN106696988A (en) * | 2017-01-24 | 2017-05-24 | 哈尔滨市特多佳调速技术开发中心 | Safety unloading retarder |
| CN107288949A (en) * | 2017-06-21 | 2017-10-24 | 马峰 | A kind of hydraulic booster |
| CN107630857A (en) * | 2017-11-09 | 2018-01-26 | 北京公联洁达公路养护工程有限公司 | Double action strip is servo-actuated mechanical lock oil cylinder |
| CN108050123A (en) * | 2017-11-29 | 2018-05-18 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN108050123B (en) * | 2017-11-29 | 2019-04-12 | 重庆维庆液压机械有限公司 | Two-way Hydraulic Cylinder |
| CN108757638A (en) * | 2018-06-11 | 2018-11-06 | 江苏万川高压电气有限公司 | The tight boosting hydraulic cylinder of servo-actuated self-locking |
| CN117605732A (en) * | 2024-01-19 | 2024-02-27 | 莱州市金恒达机械有限公司 | Hydraulic cylinder |
| CN117605732B (en) * | 2024-01-19 | 2024-04-09 | 莱州市金恒达机械有限公司 | Hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Double-acting self-locking hydraulic cylinder Effective date of registration: 20180118 Granted publication date: 20150701 Pledgee: Qilu bank Limited by Share Ltd Ji'nan Jianshe Road branch Pledgor: SHANDONG HENGHUN MACHINERY CO., LTD. Registration number: 2018370000019 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190506 Granted publication date: 20150701 Pledgee: Qilu bank Limited by Share Ltd Ji'nan Jianshe Road branch Pledgor: SHANDONG HENGHUN MACHINERY CO., LTD. Registration number: 2018370000019 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |