CN102913500A - Synchronous valve and double-hydraulic cylinder system utilizing same - Google Patents
Synchronous valve and double-hydraulic cylinder system utilizing same Download PDFInfo
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- CN102913500A CN102913500A CN2012104274726A CN201210427472A CN102913500A CN 102913500 A CN102913500 A CN 102913500A CN 2012104274726 A CN2012104274726 A CN 2012104274726A CN 201210427472 A CN201210427472 A CN 201210427472A CN 102913500 A CN102913500 A CN 102913500A
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Abstract
The invention relates to a synchronous valve and a double-hydraulic cylinder system utilizing the same. The synchronous valve and the double-hydraulic cylinder system utilizing the same solve the problem of deviated lifting caused by asynchronism in the prior art. The synchronous valve comprises an upper valve block, an upper valve spool, a middle valve block, a middle valve spool, a lower valve block, a lower valve spool and an oil passage. The three valve spools are identical, the lower end of the lower valve spool is provided with an oil inlet P, the left end of the middle valve block is provided with an oil outlet a2, and the right end of the middle valve block is provided with an oil outlet b2. The left end of the upper valve block is provided with an oil outlet b1 and an oil outlet a3, and the right end thereof is provided with an oil outlet a1 and an oil outlet b3. A differential-motion double-hydraulic cylinder system utilizing the synchronous valve comprises a left oil cylinder assembly, a differential-motion reversing valve, a right oil cylinder assembly, a left one-way valve, the synchronous valve, a manual pump assembly and a right one-way valve. A non-differential-motion double-hydraulic cylinder system utilizing the synchronous valve consists of a left oil cylinder assembly, a non-differential-motion reversing valve, a right oil cylinder assembly, a left one-way valve, the synchronous valve, a manual pump assembly and a right one-way valve. By the synchronous valve, damage in turning operation of a driving cab can be effectively prevented.
Description
Technical field
The present invention relates to a kind of synchronous valve and use the double hydraulic cylinder system of this synchronous valve, belong to the operator cabin double hydraulic cylinder synchronous lifting system of heavy-duty car or other engineering vehicle and need double hydraulic cylinder simultaneously operating hydraulic system field.
Background technique
At present, some heavy vehicle operator cabins are heavier, need to adopt the cab lifting system of double hydraulic cylinder, because the position of centre of gravity of operator cabin is setovered often. when biasing is larger, in carrying out operator cabin lift operation process, often asynchronous with simple two just the same oil hydraulic cylinders of structural parameter in parallel by being arranged symmetrically with, cause inclined to one side act phenomenon, damage easily operator cabin.
Summary of the invention
The present invention is by a kind of synchronous valve and use the double hydraulic cylinder system of this synchronous valve, and the cab lifting system oil hydraulic cylinder that has solved present employing double hydraulic cylinder is often asynchronous, the problem that causes inclined to one side act phenomenon to cause easily operator cabin to damage.
The present invention is realized by following technological scheme:
A kind of synchronous valve, formed by upper end valve piece, upper end spool, middle valve piece, middle part spool, lower end valve piece, lower end spool and oil duct, upper end spool, middle part spool are three identical spools with the lower end spool, spool lower end, lower end has the P filler opening, middle valve piece left end has the a2 oil outlet, and right-hand member has the b2 oil outlet, and upper end valve piece left end has b1 and a3 oil outlet, right-hand member has a1 and b3 oil outlet, during work;
Pressure oil enters lower end valve piece from the P filler opening by oil duct, the middle valve piece, upper end valve piece, pressure oil makes middle part spool and upper end spool remain on right positions in the left side of middle part spool and upper end spool, pressure oil acts on the right side of lower end spool simultaneously, so that the hydraulic oil in lower end spool left side extrudes from the a1 oil outlet, then pressure oil acts on the right side of middle part spool and upper end spool successively, so that middle part spool and upper end spool left side hydraulic oil extrude from a2 oil outlet and a3 oil outlet respectively, then pressure oil acts on again the lower end spool successively, the left side of middle part spool and upper end spool is so that the lower end spool, middle part spool and spool right side, upper end hydraulic oil are respectively from the b1 oil outlet, b2 oil outlet and b3 oil outlet extrude.
A1 oil outlet, a2 oil outlet and a3 oil outlet can be converged into an oil outlet a mouth by outside or internal communication, b1 oil outlet, b2 oil outlet and b3 oil outlet can be converged into a hydraulic fluid port b mouth by outside or internal communication.
A kind of differential and double cylinder device of using above synchronous valve, be comprised of left hydraulic cylinder assembly, differential selector valve, right hydraulic cylinder assembly, left one-way valve, synchronous valve, hand pump assembly and right one-way valve, the structural parameter of left hydraulic cylinder assembly and right hydraulic cylinder assembly are just the same;
The a mouth of synchronous valve, b mouth are communicated with by left one-way valve, right one-way valve and differential selector valve respectively, and differential selector valve is communicated with left hydraulic cylinder assembly and right hydraulic cylinder assembly respectively, and the hand pump assembly is respectively with synchronous 1 and the connection of differential selector valve;
Differential selector valve is two seven logical valves, and when the I position, m1, m2 and m7 mouth are communicated with, and m3 and m4 mouth are communicated with, and m5 and m6 mouth are communicated with; When the II position, the cut-off of m1 mouth, m2, m3 and m4 mouth are communicated with, and m5, m6 and m7 mouth are communicated with;
When carrying out the differential lift operation of operator cabin, differential selector valve is in the II position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve;
When carrying out the operator cabin pullback operation, differential selector valve is in the I position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve.
A kind of non-differential and double cylinder device of using above synchronous valve, be comprised of left hydraulic cylinder assembly, non-differential selector valve, right hydraulic cylinder assembly, left one-way valve, synchronous valve, hand pump assembly and right one-way valve, the structural parameter of left hydraulic cylinder assembly and right hydraulic cylinder assembly are just the same;
The a mouth of synchronous valve, b mouth are communicated with by left one-way valve, right one-way valve and non-differential selector valve respectively, and non-differential selector valve is communicated with left hydraulic cylinder assembly and right hydraulic cylinder assembly respectively, and the hand pump assembly is communicated with synchronous valve and non-differential selector valve respectively;
Non-differential selector valve is two seven logical valves, and when the I position, n1, n3 and n6 mouth are communicated with, and n2 and n4 mouth are communicated with, and n5 and n7 mouth are communicated with; When the II position, n1, n2 and n7 mouth are communicated with, and n3 and n4 mouth are communicated with, and n5 and n6 mouth are communicated with;
When carrying out the operation of operator cabin synchronous lifting, non-differential selector valve is in the II position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve;
When carrying out the operator cabin pullback operation, non-differential selector valve is in the I position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve.
Utilize synchronous valve of the present invention, between two elevating rams, increase synchronous valve of the present invention and a corresponding selector valve, under the prerequisite that increases lower manufacture cost, can effectively prevent from the driver's cab turnover operating process, damaging operator cabin, have good economic benefit.
Description of drawings
Fig. 1 is synchronous valve internal structure schematic diagram of the present invention;
Fig. 2 is synchronous valve internal oil passages figure of the present invention;
Fig. 3 is the structure of reversing valve schematic diagram that cooperates synchronous valve of the present invention to realize differential lifting and pull back and move in differential hoisting system;
Fig. 4 is synchronous valve of the present invention realizes differential lifting in differential hoisting system hydraulic schematic diagram;
Fig. 5 is synchronous valve of the present invention realize pulling back in the differential hoisting system hydraulic schematic diagram of action;
Fig. 6 is the structure of reversing valve schematic diagram that cooperates synchronous valve of the present invention to realize lifting and pull back and move in non-differential hoisting system;
Fig. 7 is synchronous valve of the present invention realizes the lifting action in non-differential hoisting system hydraulic schematic diagram;
Fig. 8 is synchronous valve of the present invention realize pulling back in the non-differential hoisting system hydraulic schematic diagram of action.
Embodiment
Referring to Fig. 1, Fig. 2, synchronous valve of the present invention is by upper end valve piece 1, upper end spool 2, middle valve piece 3, middle part spool 4, lower end valve piece 5, lower end spool 6 and oil duct form, upper end spool 2, middle part spool 4 is three identical spools with lower end spool 6, spool 6 lower ends in lower end have the P filler opening, middle valve piece 3 left ends have the a2 oil outlet, right-hand member has the b2 oil outlet, upper end valve piece 1 left end has b1 and a3 oil outlet, right-hand member has a1 and b3 oil outlet, upper end valve piece 1, middle valve piece 3 and lower end valve piece 5 connect by bolt, pass through O-ring seals between three valve pieces, sealing gasket or sealer seal.
Its working principle is as follows:
Pressure oil enters lower end valve piece 5 from the P filler opening by oil duct, middle valve piece 3, upper end valve piece 1, pressure oil makes middle part spool 4 and upper end spool 2 remain on right positions in the left side of middle part spool 4 and upper end spool 2, pressure oil acts on the right side of lower end spool 6 simultaneously, so that the hydraulic oil in lower end spool 6 left sides extrudes from the a1 oil outlet, then pressure oil acts on the right side of middle part spool 4 and upper end spool 2 successively, so that middle part spool 4 and upper end spool 2 left side hydraulic oil extrude from a2 oil outlet and a3 oil outlet respectively, then pressure oil acts on again lower end spool 6 successively, the left side of middle part spool 4 and upper end spool 2 is so that lower end spool 6, middle part spool 4 and upper end spool 2 right side hydraulic oil are respectively from the b1 oil outlet, b2 oil outlet and b3 oil outlet extrude.
A1 oil outlet, a2 oil outlet and a3 oil outlet can be converged into an oil outlet a mouth (referring to Fig. 4,5,7,8) by outside or internal communication, b1 oil outlet, b2 oil outlet and b3 oil outlet can be converged into a hydraulic fluid port b mouth (referring to Fig. 4,5,7,8) by outside or internal communication.
Embodiment 1:
Referring to Fig. 4,5, present embodiment is a kind of differential and double cylinder device of using synchronous valve of the present invention, be comprised of left hydraulic cylinder assembly 7, differential selector valve 8 (being used for differential hoisting system), right hydraulic cylinder assembly 9, left one-way valve 13, synchronous valve 11, hand pump assembly 12 and right one-way valve 10, the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same;
The a mouth of synchronous valve 11, b mouth are communicated with by left one-way valve 13, right one-way valve 10 and differential selector valve 8 respectively, and differential selector valve 8 is communicated with left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 respectively, and hand pump assembly 12 is communicated with synchronous valve 11 and differential selector valve 8 respectively;
Referring to Fig. 3, differential selector valve 8 is two seven logical valves, and when the I position, m1, m2 and m7 mouth are communicated with, and m3 and m4 mouth are communicated with, and m5 and m6 mouth are communicated with; Differential selector valve is when the II position, and the m1 mouth ends, and m2, m3 and m4 mouth are communicated with, and m5, m6 and m7 mouth are communicated with;
Referring to Fig. 4,3, when carrying out the differential lift operation of operator cabin, differential selector valve 8 is in the II position, pressure oil is by the effect of hand pump assembly 12, distribution through synchronous valve 11, supply with respectively successively the pressure oil Δ v of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 equivalent through a mouth and b mouth and left one-way valve 13 and right one-way valve 10, because this two-part pressure oil is respectively independently, and the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same, so the lifting process of two hydraulic cylinder assemblies is not subjected to the separately impact of external load, can realize equivalent lifting action successively;
Referring to Fig. 5,3, when carrying out the operator cabin pullback operation, differential selector valve 8 is in the I position, pressure oil is by the effect of hand pump assembly 12, through the distribution of synchronous valve 11, supply with respectively successively the pressure oil Δ v of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 equivalent through a mouth and b mouth and left one-way valve 13 and right one-way valve 10.Because this two-part pressure oil is respectively independently, and the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same, so the lifting process of two hydraulic cylinder assemblies is not subjected to the separately impact of external load, can realize the action of pulling back of successively equivalent.
In the above lifting and the process of pulling back, suitable as long as Δ v controls, the small action of pulling back successively will occur in two oil hydraulic cylinders, and under continuous running, two oil hydraulic cylinders can show basic synchronization motion.
Embodiment 2:
Referring to Fig. 7,8, present embodiment is a kind of non-differential and double cylinder device of using synchronous valve of the present invention, be comprised of left hydraulic cylinder assembly 7, non-differential selector valve 14, right hydraulic cylinder assembly 9, left one-way valve 13, synchronous valve 11, hand pump assembly 12 and right one-way valve 10, the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same;
The a mouth of synchronous valve 11, b mouth are communicated with by left one-way valve 13, right one-way valve 10 and non-differential selector valve 14 respectively, non-differential selector valve 14 is communicated with left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 respectively, and hand pump assembly 12 is communicated with synchronous valve 11 and non-differential selector valve 14 respectively;
Referring to Fig. 6, non-differential selector valve 14 is two seven logical valves, and when the I position, n1, n3 and n6 mouth are communicated with, and n2 and n4 mouth are communicated with, and n5 and n7 mouth are communicated with; When the II position, n1, n2 and n7 mouth are communicated with, and n3 and n4 mouth are communicated with, and n5 and n6 mouth are communicated with;
Referring to Fig. 7,6, when carrying out the operation of operator cabin synchronous lifting, non-differential selector valve 14 is in the II position, pressure oil is by the effect of hand pump assembly 12, distribution through synchronous valve 11, supply with respectively successively the pressure oil Δ v of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 equivalent through a mouth and b mouth and left one-way valve 13 and right one-way valve 10, because this two-part pressure oil is respectively independently, and the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same, so the lifting process of two hydraulic cylinder assemblies is not subjected to the separately impact of external load, can realize the synchronous lifting action of operator cabin;
Referring to Fig. 8,6, when carrying out the operator cabin pullback operation, non-differential selector valve 14 is in the I position, pressure oil is by the effect of hand pump assembly 12, through the distribution of synchronous valve 11, supply with respectively successively the pressure oil Δ v of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 equivalent through a mouth and b mouth and left one-way valve 13 and right one-way valve 10.Because this two-part pressure oil is respectively independently, and the structural parameter of left hydraulic cylinder assembly 7 and right hydraulic cylinder assembly 9 are just the same, so the lifting process of two hydraulic cylinder assemblies is not subjected to the separately impact of external load, can realize the action of pulling back synchronously of operator cabin.
Among the present invention, just selector valve is different for non-differential hoisting system and the contrast of differential hoisting system.
In addition, among the present invention, synchronous valve 5 can adopt compound mode more than 3 valve pieces according to the needs of fuel delivery, simultaneously, can be combined into an integral body so that pipeline is installed with one-way valve 13 and one-way valve 10 and selector valve.
Claims (4)
1. synchronous valve, it is characterized in that: formed by upper end valve piece, upper end spool, middle valve piece, middle part spool, lower end valve piece, lower end spool and oil duct, upper end spool, middle part spool are three identical spools with the lower end spool, spool lower end, lower end has the P filler opening, middle valve piece left end has the a2 oil outlet, and right-hand member has the b2 oil outlet, and upper end valve piece left end has b1 and a3 oil outlet, right-hand member has a1 and b3 oil outlet, during work;
Pressure oil enters lower end valve piece from the P filler opening by oil duct, the middle valve piece, upper end valve piece, pressure oil makes middle part spool and upper end spool remain on right positions in the left side of middle part spool and upper end spool, pressure oil acts on the right side of lower end spool simultaneously, so that the hydraulic oil in lower end spool left side extrudes from the a1 oil outlet, then pressure oil acts on the right side of middle part spool and upper end spool successively, so that middle part spool and upper end spool left side hydraulic oil extrude from a2 oil outlet and a3 oil outlet respectively, then pressure oil acts on again the lower end spool successively, the left side of middle part spool and upper end spool is so that the lower end spool, middle part spool and spool right side, upper end hydraulic oil are respectively from the b1 oil outlet, b2 oil outlet and b3 oil outlet extrude.
2. a kind of synchronous valve according to claim 1, it is characterized in that: a1 oil outlet, a2 oil outlet and a3 oil outlet are converged into an oil outlet a mouth by outside or internal communication, b1 oil outlet, b2 oil outlet and b3 oil outlet are converged into a hydraulic fluid port b mouth by outside or internal communication.
3. differential and double cylinder device, it is characterized in that: be comprised of left hydraulic cylinder assembly, differential selector valve, right hydraulic cylinder assembly, left one-way valve, synchronous valve claimed in claim 2, hand pump assembly and right one-way valve, the structural parameter of left hydraulic cylinder assembly and right hydraulic cylinder assembly are just the same;
The a mouth of synchronous valve, b mouth are communicated with by left one-way valve, right one-way valve and differential selector valve respectively, and differential selector valve is communicated with left hydraulic cylinder assembly and right hydraulic cylinder assembly respectively, and the hand pump assembly is respectively with synchronous 1 and the connection of differential selector valve;
Differential selector valve is two seven logical valves, and when the I position, m1, m2 and m7 mouth are communicated with, and m3 and m4 mouth are communicated with, and m5 and m6 mouth are communicated with; When the II position, the cut-off of m1 mouth, m2, m3 and m4 mouth are communicated with, and m5, m6 and m7 mouth are communicated with;
When carrying out the differential lift operation of operator cabin, differential selector valve is in the II position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve;
When carrying out the operator cabin pullback operation, differential selector valve is in the I position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve.
4. non-differential and double cylinder device, it is characterized in that: be comprised of left hydraulic cylinder assembly, non-differential selector valve, right hydraulic cylinder assembly, left one-way valve, synchronous valve claimed in claim 2, hand pump assembly and right one-way valve, the structural parameter of left hydraulic cylinder assembly and right hydraulic cylinder assembly are just the same;
The a mouth of synchronous valve, b mouth are communicated with by left one-way valve, right one-way valve and non-differential selector valve respectively, and non-differential selector valve is communicated with left hydraulic cylinder assembly and right hydraulic cylinder assembly respectively, and the hand pump assembly is communicated with synchronous valve and non-differential selector valve respectively;
Non-differential selector valve is two seven logical valves, and when the I position, n1, n3 and n6 mouth are communicated with, and n2 and n4 mouth are communicated with, and n5 and n7 mouth are communicated with; When the II position, n1, n2 and n7 mouth are communicated with, and n3 and n4 mouth are communicated with, and n5 and n6 mouth are communicated with;
When carrying out the operation of operator cabin synchronous lifting, non-differential selector valve is in the II position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve;
When carrying out the operator cabin pullback operation, non-differential selector valve is in the I position, the effect of pressure oil by the hand pump assembly through the distribution of synchronous valve, supplied with respectively the pressure oil Δ v of left hydraulic cylinder assembly and right hydraulic cylinder assembly equivalent successively through a mouth and b mouth and left one-way valve and right one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104274726A CN102913500A (en) | 2012-10-25 | 2012-10-25 | Synchronous valve and double-hydraulic cylinder system utilizing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104274726A CN102913500A (en) | 2012-10-25 | 2012-10-25 | Synchronous valve and double-hydraulic cylinder system utilizing same |
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| CN102913500A true CN102913500A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104274726A Pending CN102913500A (en) | 2012-10-25 | 2012-10-25 | Synchronous valve and double-hydraulic cylinder system utilizing same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013521A (en) * | 2017-04-11 | 2017-08-04 | 鑫矿液压科技有限公司 | A kind of synchronous valve |
| CN109538548A (en) * | 2018-12-18 | 2019-03-29 | 北奔重型汽车集团有限公司 | A kind of non-differential cab lifting system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1327987A (en) * | 1970-08-31 | 1973-08-22 | Bendix Corp | Valve assembly more particularly for a vehicle hydraulic system |
| CN2090449U (en) * | 1990-09-29 | 1991-12-11 | 吴寿根 | Multicylinder speed synchronizing valve |
| CN2708019Y (en) * | 2004-05-19 | 2005-07-06 | 马生娃 | Multi-cylinder synchronous valve |
| DE102008059437B3 (en) * | 2008-11-27 | 2010-01-07 | Parker Hannifin Gmbh & Co. Kg | Hydraulic control valve for controlling operating cylinder, has control spools, where each spool is associated with linear variable differential transformer and hydraulic pilot controller coupled to system, for separate control of spools |
| CN202468502U (en) * | 2012-03-13 | 2012-10-03 | 徐州重型机械有限公司 | Dual-cylinder synchronous control hydraulic system and engineering machinery |
-
2012
- 2012-10-25 CN CN2012104274726A patent/CN102913500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1327987A (en) * | 1970-08-31 | 1973-08-22 | Bendix Corp | Valve assembly more particularly for a vehicle hydraulic system |
| CN2090449U (en) * | 1990-09-29 | 1991-12-11 | 吴寿根 | Multicylinder speed synchronizing valve |
| CN2708019Y (en) * | 2004-05-19 | 2005-07-06 | 马生娃 | Multi-cylinder synchronous valve |
| DE102008059437B3 (en) * | 2008-11-27 | 2010-01-07 | Parker Hannifin Gmbh & Co. Kg | Hydraulic control valve for controlling operating cylinder, has control spools, where each spool is associated with linear variable differential transformer and hydraulic pilot controller coupled to system, for separate control of spools |
| CN202468502U (en) * | 2012-03-13 | 2012-10-03 | 徐州重型机械有限公司 | Dual-cylinder synchronous control hydraulic system and engineering machinery |
Non-Patent Citations (1)
| Title |
|---|
| 历超 等: "基于新型数字同步阀的液压同步系统研究", 《机械与电子》, vol. 12, 31 December 2006 (2006-12-31), pages 47 - 49 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013521A (en) * | 2017-04-11 | 2017-08-04 | 鑫矿液压科技有限公司 | A kind of synchronous valve |
| CN107013521B (en) * | 2017-04-11 | 2018-06-08 | 鑫矿液压科技有限公司 | A kind of synchronous valve |
| CN109538548A (en) * | 2018-12-18 | 2019-03-29 | 北奔重型汽车集团有限公司 | A kind of non-differential cab lifting system |
| CN109538548B (en) * | 2018-12-18 | 2024-03-15 | 北奔重型汽车集团有限公司 | Non-differential cab lifting system |
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Application publication date: 20130206 |