CN105402203A - Oil cylinder tail end automatic lockup valve and hydraulic oil cylinder with oil cylinder tail end automatic lockup valve - Google Patents

Oil cylinder tail end automatic lockup valve and hydraulic oil cylinder with oil cylinder tail end automatic lockup valve Download PDF

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Publication number
CN105402203A
CN105402203A CN201510887588.1A CN201510887588A CN105402203A CN 105402203 A CN105402203 A CN 105402203A CN 201510887588 A CN201510887588 A CN 201510887588A CN 105402203 A CN105402203 A CN 105402203A
Authority
CN
China
Prior art keywords
oil cylinder
valve
spool
piston
automatic locking
Prior art date
Application number
CN201510887588.1A
Other languages
Chinese (zh)
Inventor
刘华亮
薛占刚
李楠
王汉杰
冯会娟
王斌
Original Assignee
郑州宇通重工有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 郑州宇通重工有限公司 filed Critical 郑州宇通重工有限公司
Priority to CN201510887588.1A priority Critical patent/CN105402203A/en
Publication of CN105402203A publication Critical patent/CN105402203A/en

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Abstract

The invention discloses an oil cylinder tail end automatic lockup valve and a hydraulic oil cylinder with the oil cylinder tail end automatic lockup valve. The automatic lockup valve comprises a valve body mounted on the oil cylinder wall at the tail end of an oil cylinder, wherein a valve element stretching into the oil cylinder is arranged on the valve body; a spring cavity is formed below the valve element; reset springs are arranged in the spring cavity; an oil leakage plug is arranged at the bottom of the spring cavity; a seal ring is arranged between the valve element and the valve body; a cavity formed between the valve body below the seal ring and the valve element is a guide oil cavity; a guide oil port is formed in the side wall of the valve body; and the guide oil port is communicated with the guide oil cavity. An hydraulic oil cylinder piston rod is completely locked up and is prevented from accidently moving through a lockup structure of a novel oil cylinder.

Description

A kind of oil cylinder end automatic locking valve and hydraulic jack thereof
Technical field
The present invention relates to a kind of hydraulic jack with mechanical trip location; by the mechanical locking valve of described hydraulic jack; when can make the piston rod effective location of hydraulic jack on required working stroke position and ensure that main shut-down system does not work, the piston rod stop position of hydraulic jack remains unchanged effectively.
Background technique
Hydraulic jack belongs to a kind of hydraulic element of straight reciprocating motion, the piston rod of existing technology hydraulic jack inside does not possess the function at the inner a certain special position locking of hydraulic jack cylinder barrel, but it is in daily engineer applied process, locked when often needing the piston rod of hydraulic jack to run to a certain special position, no longer move.
In order to realize latch functions, existing technology installs hydraulic lock or equilibrium valve usually on the position of the rodless cavity of hydraulic jack (hereinafter referred to as large chamber) hydraulic fluid port and/or rod chamber (hereinafter referred to as loculus) hydraulic fluid port, and realizes latch functions by the control characteristic of the hydraulic control component such as hydraulic lock or equilibrium valve.
Although existing technological means achieves the latch functions of hydraulic cylinder piston rod to a certain extent, but in some cases, hydraulic lock or equilibrium valve clamping stagnation, leakage can be caused due to Oil Contamination in Hydraulic System reason or there is the reason of the internal leakage that regulation allows due to hydraulic jack, when main frame all can be caused not work, the large loculus of hydraulic jack is poorly sealed so cause hydraulic cylinder piston rod slowly to move, locking loosely phenomenon produce, can safety problem be caused time serious.
Summary of the invention
A kind of oil cylinder end automatic locking valve that object of the present invention is designed for the deficiency existing for prior art just and hydraulic jack thereof, rely on the self-contained locking structure of novel oil cylinder to realize complete locking hydraulic cylinder piston rod and prevent piston rod from producing accidental movement.
This Novel hydraulic cylinder locking function realizes by following technique measures:
A kind of oil cylinder end automatic locking valve, comprise the valve body be arranged on oil cylinder end cylinder wall, valve body is provided with and extend into in-oil cylinder spool, spool bottom is provided with spring chamber, in spring chamber, be provided with Returnning spring, the bottom of spring chamber is provided with draining plug; Between spool and valve body, be provided with seal ring, the cavity surrounded between the valve body of sealing ring lower potion and spool is guide's oil pocket, body wall is provided with guide's hydraulic fluid port, and guide's hydraulic fluid port is communicated with guide's oil pocket.
Above-mentioned oil cylinder end automatic locking valve, described draining plug and valve body are for being threaded.
Above-mentioned oil cylinder end automatic locking valve, described spool is made up of mandrel and central layer, and central layer is arranged on mandrel, and for friction pair is connected between central layer with spring chamber, Returnning spring is enclosed within the mandrel of central layer bottom, and the length of central layer bottom mandrel is less than the height in central layer lower springs chamber.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, comprise oil cylinder and piston, oil cylinder end cylinder wall is provided with oil cylinder end automatic locking valve, oil cylinder is provided with for the flexible through hole of spool, piston at least arranges a lock groove corresponding with spool, extend into the end of in-oil cylinder spool or/and piston two ends are circular arc or are wedge shape.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, described oil cylinder end automatic locking valve is two, is separately positioned on cylinder wall corresponding to oil hydraulic cylinder two filler openings.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, described lock groove is one, be arranged on the piston in the large chamber of oil cylinder, i.e. left lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to left lock groove is consistent.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, described lock groove is one, be arranged on the piston of oil cylinder loculus, i.e. right lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, described lock groove is two, i.e. left lock groove and right lock groove, be symmetricly set on respectively on piston, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, or distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent; Distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent, or distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to the first lock groove is consistent.
The present invention can meet oil cylinder and runs to end point stop motion and carry out locked, generally mechanical locking mechanism is more reliable than hydraulic pressure locking mechanism, and safety, design and a kind ofly can carry out the locked device of machinery at oil cylinder end and carry out locking, can be good at solving oil cylinder and stop causing locking loosely problem that is mobile and hydraulic element for a long time; Oil cylinder end automatic locking valve fundamental function: when oil cylinder loculus B mouth oil-feed, oil cylinder piston is retracted, when the sphenoid surface of piston or arc-shaped surface touch spool, spring force is overcome by the effect of power, spool moves down unblanks, when after piston contact to oil cylinder bottom, spool enters in lock groove by the effect of spring force and carries out locking, realizes automatic locking function.When the A mouth oil-feed of oil cylinder large chamber, large chamber A mouth is communicated with by exterior line with lock valve X mouth, and pressure oil enters the first guide cavity of spool by guide's hydraulic fluid port, and spool is opened and realized unlocking under the effect of pressure oil, and oil cylinder piston stretches out, and realizes automatic unlocking function.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hydraulic jack of prior art.
Fig. 2 is the structural representation of oil cylinder end automatic locking valve of the present invention and hydraulic jack thereof.
Fig. 3 is the close-up schematic view at F position in Fig. 2.
Marginal data
1, cylinder body of hydraulic oil cylinder; 2, guide's hydraulic fluid port; 3, valve body; 4, Returnning spring; 5, draining plug; 6, spring chamber; 7, spool; 8, guide's oil pocket; 9, seal ring; 10, lock groove; 11, oil cylinder piston; A mouth, hydraulic jack large chamber hydraulic fluid port; B mouth, hydraulic jack loculus hydraulic fluid port; X mouth, guide's hydraulic fluid port; T mouth, drain tap, 12, mandrel; 13, central layer; 14, through hole.
Embodiment
As shown in figure Fig. 3, a kind of oil cylinder end automatic locking valve, comprise the valve body 3 be arranged on oil cylinder end cylinder wall, valve body is provided with and extend into in-oil cylinder spool 7, described spool is made up of mandrel 12 and central layer 13, and central layer is arranged on mandrel, spool bottom is provided with spring chamber 6, and for friction pair is connected between central layer with spring chamber, Returnning spring 4 is enclosed within the mandrel of central layer bottom, and the length of central layer bottom mandrel is less than the height in central layer lower springs chamber.The bottom of spring chamber is provided with draining plug 5, and draining plug and valve body are for being threaded; Between spool and valve body, be provided with seal ring 9, the cavity surrounded between the valve body of sealing ring lower potion and spool is guide's oil pocket 8, body wall is provided with guide's hydraulic fluid port 2, and guide's hydraulic fluid port is communicated with guide's oil pocket.
Hydraulic jack containing above-mentioned oil cylinder end automatic locking valve, comprise oil cylinder 1 and piston 11, oil cylinder end cylinder wall is provided with oil cylinder end automatic locking valve, oil cylinder is provided with for the flexible through hole 14 of spool, piston at least arranges a lock groove 10 corresponding with spool, extend into the end of in-oil cylinder spool or/and piston two ends are circular arc or are wedge shape.
Hydraulic jack as shown in Figure 2 containing above-mentioned oil cylinder end automatic locking valve, oil cylinder end automatic locking valve is two, is separately positioned on the cylinder wall of oil hydraulic cylinder two filler opening A mouths and B mouth correspondence.Described lock groove 10 is two, i.e. left lock groove and right lock groove, be symmetricly set on respectively on piston, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, or distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent; Distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent, or distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to the first lock groove is consistent.
Lock groove of the present invention can also be one, be arranged on the piston in the large chamber of oil cylinder, i.e. left lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to left lock groove is consistent.
Lock groove of the present invention can also be one, position changes to some extent, be arranged on the piston of oil cylinder loculus, i.e. right lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent.
The present invention can meet oil cylinder and runs to end point stop motion and carry out locked, generally mechanical locking mechanism is more reliable than hydraulic pressure locking mechanism, and safety, design and a kind ofly can carry out the locked device of machinery at oil cylinder end and carry out locking, can be good at solving oil cylinder and stop causing locking loosely problem that is mobile and hydraulic element for a long time; Oil cylinder end automatic locking valve fundamental function: when oil cylinder loculus B mouth oil-feed, oil cylinder piston is retracted, when the sphenoid surface of piston or arc-shaped surface touch spool, spring force is overcome by the effect of power, spool moves down unblanks, when after piston contact to oil cylinder bottom, spool enters in lock groove by the effect of spring force and carries out locking, realizes automatic locking function.When the A mouth oil-feed of oil cylinder large chamber, large chamber A mouth is communicated with by exterior line with lock valve X mouth, and pressure oil enters the first guide cavity of spool by guide's hydraulic fluid port, and spool is opened and realized unlocking under the effect of pressure oil, and oil cylinder piston stretches out, and realizes automatic unlocking function.
Working procedure of the present invention is as follows:
Guide's oil pocket 8 that pressure oil can flow freely into; Seal ring 9.When oil cylinder loculus B mouth oil-feed, oil cylinder piston is retracted, and when the sphenoid surface of piston touches spool, the active force of sphenoid surface or arc-shaped surface and spool 7 overcomes the spring force of Returnning spring 4, and spool 7 moves down realization and unblanks; When after piston contact to oil cylinder bottom, spool 7 slides in piston lock groove 10 in the effect of the spring force of Returnning spring 4 and carries out locking.No matter the piston any power be subject in rectilinear direction is all subject at the bottom of oil cylinder and the mechanical position limitation of spool 7, realizes automatic locking function.When the A mouth oil-feed of oil cylinder large chamber, large chamber A mouth is communicated with by exterior line with lock valve X mouth, pressure oil enters the first guide cavity of spool by guide's hydraulic fluid port 2, promotion spool 7 overcomes spring force and moves down, after spool 7 departs from lock groove 10, piston can freely stretch out, and realizes automatic unlocking function, the draining plug 5 in whole process medi-spring chamber 6 is by drain tap T draining, and the fast reciprocating that can realize spool 7 moves.
In addition, this lock valve also can carry out modular design, easy for installation, and can carry out organizing installation, part occasion can replace the function of hydraulic lock more.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-mentioned enforcement.Example, all technological schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (8)

1. an oil cylinder end automatic locking valve, it is characterized in that: comprise the valve body be arranged on oil cylinder end cylinder wall, valve body is provided with and extend into in-oil cylinder spool, spool bottom is provided with spring chamber, in spring chamber, be provided with Returnning spring, the bottom of spring chamber is provided with draining plug; Between spool and valve body, be provided with seal ring, the cavity surrounded between the valve body of sealing ring lower potion and spool is guide's oil pocket, body wall is provided with guide's hydraulic fluid port, and guide's hydraulic fluid port is communicated with guide's oil pocket.
2. oil cylinder end automatic locking valve according to claim 1, is characterized in that: described draining plug and valve body are for being threaded.
3. oil cylinder end automatic locking valve according to claim 1, it is characterized in that: described spool is made up of mandrel and central layer, central layer is arranged on mandrel, and for friction pair is connected between central layer with spring chamber, Returnning spring is enclosed within the mandrel of central layer bottom, and the length of central layer bottom mandrel is less than the height in central layer lower springs chamber.
4. the hydraulic jack containing the oil cylinder end automatic locking valve according to any one of claim 1-3, comprise oil cylinder and piston, oil cylinder end cylinder wall is provided with oil cylinder end automatic locking valve, oil cylinder is provided with for the flexible through hole of spool, piston at least arranges a lock groove corresponding with spool, extend into the end of in-oil cylinder spool or/and piston two ends are circular arc or are wedge shape.
5. the hydraulic jack containing oil cylinder end automatic locking valve according to claim 4, is characterized in that: described oil cylinder end automatic locking valve is two, is separately positioned on cylinder wall corresponding to oil hydraulic cylinder two filler openings.
6. the hydraulic jack containing oil cylinder end automatic locking valve according to claim 5, it is characterized in that: described lock groove is one, be arranged on the piston in the large chamber of oil cylinder, i.e. left lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to left lock groove is consistent.
7. the hydraulic jack containing oil cylinder end automatic locking valve according to claim 5, it is characterized in that: described lock groove is one, be arranged on the piston of oil cylinder loculus, i.e. right lock groove, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent, the distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent.
8. the hydraulic jack containing oil cylinder end automatic locking valve according to claim 5, it is characterized in that: described lock groove is two, i.e. left lock groove and right lock groove, be symmetricly set on respectively on piston, and distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D1 between piston one side end to left lock groove is consistent, or distance L1 between end, oil cylinder large chamber and the spool of first oil cylinder end automatic locking valve and the distance D2 between piston one side end to right lock groove is consistent; Distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M1 between piston end side to right lock groove is consistent, or distance L2 between oil cylinder loculus end and the spool of second oil cylinder end automatic locking valve and the distance M2 between piston end side to the first lock groove is consistent.
CN201510887588.1A 2015-12-07 2015-12-07 Oil cylinder tail end automatic lockup valve and hydraulic oil cylinder with oil cylinder tail end automatic lockup valve CN105402203A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201510887588.1A CN105402203A (en) 2015-12-07 2015-12-07 Oil cylinder tail end automatic lockup valve and hydraulic oil cylinder with oil cylinder tail end automatic lockup valve

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286466A (en) * 2016-10-28 2017-01-04 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) The double rod of a kind of double acting just position, end mechanical locking oil cylinder
CN108443266A (en) * 2018-06-11 2018-08-24 江苏万川高压电气有限公司 A kind of tight hydraulic pressure resetting-mechanism of servo-actuated self-locking of the tight boosting hydraulic cylinder of servo-actuated self-locking
CN108518381A (en) * 2018-06-11 2018-09-11 江苏万川高压电气有限公司 A kind of tight boosting hydraulic cylinder of servo-actuated self-locking
CN108591179A (en) * 2018-07-18 2018-09-28 徐州重型机械有限公司 Pre- locking oil cylinder and hoisting machinery
CN108843651A (en) * 2018-06-11 2018-11-20 江苏万川高压电气有限公司 A kind of major-minor hydraulic cylinder force-increasing mechanism of the tight boosting hydraulic cylinder of servo-actuated self-locking
CN109695605A (en) * 2019-02-14 2019-04-30 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) A kind of deep-sea self-shield self-locking oil cylinder

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GB564581A (en) * 1942-02-26 1944-10-04 Bendix Aviat Corp Improvements in or relating to hydraulic jacks and the like
EP1788257A2 (en) * 2005-11-18 2007-05-23 Festo Ag & Co. Fluid pressure actuator with end of stroke locking means
CN104006022A (en) * 2014-05-29 2014-08-27 芜湖市银鸿液压件有限公司 Hydraulic cylinder capable of automatically and mechanically locating lift dam in reciprocating manner
CN104389851A (en) * 2014-11-20 2015-03-04 徐州徐工施维英机械有限公司 Hydraulic limiting device and concrete pump truck
CN104454780A (en) * 2014-10-23 2015-03-25 长沙中联重科环卫机械有限公司 Oil cylinder with mechanical locking function and hydraulic system
CN105102828A (en) * 2013-01-30 2015-11-25 梅西埃-道蒂公司 Locking mechanism for locking an actuator
CN205225932U (en) * 2015-12-07 2016-05-11 郑州宇通重工有限公司 Terminal automatic locking valve of hydro -cylinder and hydraulic cylinder thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB564581A (en) * 1942-02-26 1944-10-04 Bendix Aviat Corp Improvements in or relating to hydraulic jacks and the like
EP1788257A2 (en) * 2005-11-18 2007-05-23 Festo Ag & Co. Fluid pressure actuator with end of stroke locking means
CN105102828A (en) * 2013-01-30 2015-11-25 梅西埃-道蒂公司 Locking mechanism for locking an actuator
CN104006022A (en) * 2014-05-29 2014-08-27 芜湖市银鸿液压件有限公司 Hydraulic cylinder capable of automatically and mechanically locating lift dam in reciprocating manner
CN104454780A (en) * 2014-10-23 2015-03-25 长沙中联重科环卫机械有限公司 Oil cylinder with mechanical locking function and hydraulic system
CN104389851A (en) * 2014-11-20 2015-03-04 徐州徐工施维英机械有限公司 Hydraulic limiting device and concrete pump truck
CN205225932U (en) * 2015-12-07 2016-05-11 郑州宇通重工有限公司 Terminal automatic locking valve of hydro -cylinder and hydraulic cylinder thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286466A (en) * 2016-10-28 2017-01-04 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) The double rod of a kind of double acting just position, end mechanical locking oil cylinder
CN106286466B (en) * 2016-10-28 2018-02-23 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) Last position mechanical locking oil cylinder at the beginning of a kind of double rods of double acting
CN108443266A (en) * 2018-06-11 2018-08-24 江苏万川高压电气有限公司 A kind of tight hydraulic pressure resetting-mechanism of servo-actuated self-locking of the tight boosting hydraulic cylinder of servo-actuated self-locking
CN108518381A (en) * 2018-06-11 2018-09-11 江苏万川高压电气有限公司 A kind of tight boosting hydraulic cylinder of servo-actuated self-locking
CN108843651A (en) * 2018-06-11 2018-11-20 江苏万川高压电气有限公司 A kind of major-minor hydraulic cylinder force-increasing mechanism of the tight boosting hydraulic cylinder of servo-actuated self-locking
CN108518381B (en) * 2018-06-11 2019-09-27 江苏万川液压机械设备有限公司 A kind of tight boosting hydraulic cylinder of servo-actuated self-locking
CN108591179A (en) * 2018-07-18 2018-09-28 徐州重型机械有限公司 Pre- locking oil cylinder and hoisting machinery
CN109695605A (en) * 2019-02-14 2019-04-30 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) A kind of deep-sea self-shield self-locking oil cylinder
CN109695605B (en) * 2019-02-14 2020-03-27 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) Self-locking oil cylinder for deep sea self-protection

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Application publication date: 20160316