CN104192201B - Hydraulic steering control valve and hydraulic steering system - Google Patents
Hydraulic steering control valve and hydraulic steering system Download PDFInfo
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- CN104192201B CN104192201B CN201410405438.8A CN201410405438A CN104192201B CN 104192201 B CN104192201 B CN 104192201B CN 201410405438 A CN201410405438 A CN 201410405438A CN 104192201 B CN104192201 B CN 104192201B
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Abstract
The present invention relates to fluid-link steering control, inefficiency is controlled for solving existing fluid-link steering, the shortcoming of operating characteristics difference, disclosure one hydraulic steering control valve, including main valve, guide's left oil port and guide's right oil port, main valve has main valve plug, working oil input port, tank drainback mouth and for the work left oil port that is connected with steering cylinder and the right oil port that works, selector valve, selector valve is connected between main valve plug and guide's left oil port and guide's right oil port, guide's left oil port is connected with the hydraulic control left end of main valve plug makes main valve plug work in left position or guide's right oil port be connected with the hydraulic control right-hand member of main valve plug make main valve plug work in right position, when main valve plug is operated in left position, the hydraulic control right-hand member of described main valve plug connects with work left oil port, when main valve plug is operated in right position, the hydraulic control left end of described main valve plug connects with work right oil port.Hydraulic steering control valve of the present invention and hydraulic steering system have advantage energy-conservation, good operability.
Description
Technical field
The present invention relates to a kind of fluid-link steering to control, particularly relate to a kind of hydraulic steering control valve and there is the hydraulic steering system of this hydraulic steering control valve.
Background technology
Existing most of engineering machinery such as loader, the commonly used quantitative system of its steering hydraulic system, the pump of use is dosing pump.Owing to steering pump is dosing pump, discharge capacity can not export required flow and pressure according to the working conditions change of loader, and the unnecessary flow of steering pump will fall in spill losses, and the work efficiency of loader is not high yet, it is impossible to reach energy-conservation purpose.And part machine adopts variable delivery hydraulic system, Hydraulic Elements are nearly all from the import of external high price, and procurement cycle is very long, so considerably increases the cost of loader.In load-reacting steering, the output flow of steering pump can pass through the swash plate controller of the size adjustment pump of load pressure, pump output and the required flow of system is made by changing swashplate angle, unnecessary flow is not had to export, it is possible to reach the effect of hydraulic energy-saving.Load sensitive system application in engineering machinery is a kind of embodiment of green energy conservation theory, is also the development trend in engineering machinery future, but domestic but without load-sensitive steering control valve more energy efficient, that operating characteristics is more comfortable at present.
Summary of the invention
Present invention aims to the disadvantages mentioned above of existing hydraulic steering control valve and the hydraulic steering control valve of a kind of energy-conservation, good operability is provided and there is the hydraulic steering system of this hydraulic steering control valve.
The technical scheme is that and be achieved in that: a kind of hydraulic steering control valve of structure, including main valve, guide's left oil port and guide's right oil port, main valve has main valve plug, working oil input port, tank drainback mouth and for the work left oil port that is connected with steering cylinder and the right oil port that works, selector valve, selector valve is connected between main valve and guide's left oil port and guide's right oil port, guide's left oil port is connected with the hydraulic control left end of main valve plug makes main valve plug work in left position or guide's right oil port be connected with the hydraulic control right-hand member of main valve plug make main valve plug work in right position, when main valve plug is operated in left position, the hydraulic control right-hand member of described main valve plug connects with work left oil port, when main valve plug is operated in right position, the hydraulic control left end of described main valve plug connects with work right oil port.
In above-mentioned hydraulic steering control valve, when main valve works in left position, the hydraulic control left end of main valve plug connects with work left oil port through main valve, and when main valve works in right position, the hydraulic control right-hand member of main valve plug connects with work right oil port through main valve.Being provided with the first oil duct and the second oil duct on main valve, main valve works in during left position the first oil duct by the hydraulic control left end of main valve plug to work left oil port one-way conduction, and main valve works in during right position the second oil duct by the hydraulic control right-hand member of main valve plug to work right oil port conducting.
In above-mentioned hydraulic steering control valve, selector valve includes left selector valve and right selector valve, left selector valve is the two-position three-way valve of hydraulic control, it is in its G hydraulic fluid port during left working position and connects with H hydraulic fluid port, when it is in right working position, H hydraulic fluid port connects with C hydraulic fluid port, right selector valve is the two-position three-way valve of hydraulic control, it is in its E hydraulic fluid port during left working position and connects with F hydraulic fluid port, when it is in right working position, D hydraulic fluid port connects with E hydraulic fluid port, with the hydraulic control left end of left selector valve while of guide's left oil port, G hydraulic fluid port, the hydraulic control left end connection of right selector valve, with the right hydraulic control end of right selector valve while of guide's right oil port, D hydraulic fluid port connects with the right hydraulic control end of left selector valve, the H hydraulic fluid port of left selector valve connects with the hydraulic control left end of main valve plug, the C hydraulic fluid port of left selector valve to work right oil port one-way conduction, right selector valve E hydraulic fluid port connects with the hydraulic control right-hand member of main valve plug, right selector valve F hydraulic fluid port to work left oil port one-way conduction.The C hydraulic fluid port of left selector valve is provided with first throttle valve between work right oil port, and the F hydraulic fluid port of right selector valve is provided with second throttle between work left oil port.
In above-mentioned hydraulic steering control valve, work left oil port and work right oil port are connected with tank drainback mouth each via a repairing overload overflow valve, when the pressure on work left oil port and work right oil port exceedes the safe pressure of design by this repairing overload overflow valve overflow pressure relief, when work left oil port and work right oil port then carry out repairing by the oil suction from hydraulic oil container of this valve when there is negative pressure.
In above-mentioned hydraulic steering control valve, between working oil input port and tank drainback mouth, it is connected to relief valve.
In above-mentioned hydraulic steering control valve, the first oil duct and be each provided with variable throttle valve on the second oil duct.
The present invention is for realizing its goal of the invention, also provide for a kind of hydraulic steering system, including steering cylinder, load-sensitive steering gear, load-reacting pump, fuel tank, also include aforesaid hydraulic steering control valve, the work left oil port of hydraulic steering control valve connects with loculus respectively at the big chamber of steering cylinder with work right oil port, guide's left oil port and guide's right oil port of hydraulic steering control valve are connected with load-sensitive steering gear, the working oil input port of hydraulic steering control valve connects with the pressure oil delivery outlet of load-reacting pump, the tank drainback mouth of hydraulic steering control valve connects with fuel tank, the LS mouth of load-reacting pump connects with the load feedback mouth of load-sensitive steering gear.
The present invention is compared with prior art, advantages of the present invention: hydraulic steering control valve and there is the hydraulic steering system of this hydraulic steering control valve, the output of pump it is automatically adjusted according to executive component necessary flow, and unrelated with load, and hydraulic system energy-saving effect is obvious.Additionally the present invention is by two motions selecting spool and control bound core, and pilot control pressure is high pressure, almost consistent with inlet pressure, will not produce high pressure kicks loss, relative quantification energy saving of system；When pilot control end of the present invention comes oily, fluid can through main valve plug commutate end squeeze working hole check valve enter steering cylinder, and the fluid of the main valve plug other end can be clamp-oned commutation end and by the working hole check valve entrance steering cylinder of the end that commutates by valve body oil duct, steering flow, except a small amount of internal leakage, does not have flow loss.Main valve plug two ends of the present invention back oil road is each respectively provided with throttle orifice open in order to limit the too fast of main valve plug, makes main valve plug motion relatively steady, and then make to turn to there is good stationarity.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of the present invention；
Fig. 2 is the front view structural representation of the present invention；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the A-A sectional view of Fig. 2；
Fig. 5 is the B-B sectional view of Fig. 3；
Fig. 6 is the D-D sectional view of Fig. 4；
Fig. 7 is the C-C sectional view of Fig. 2；
Fig. 8 is the hydraulic steering system schematic diagram of the present invention.
Parts title and sequence number in figure:
Main valve 1, valve body 1-1, end cap 1-2, main valve plug 1-3, first check valve 4, second check valve 5, first throttle valve 6, left selector valve 7, left selection spool 7-1, left pilot control joint 7-2, right selector valve 10, right selection spool 10-1, right pilot control joint 10-2, second throttle 11, first repairing overload overflow valve 12, relief valve 13, second repairing overload overflow valve 14, 3rd choke valve 15, control joint 16, load-reacting pump 17, load-sensitive steering gear 18, hydraulic steering control valve 19, steering cylinder 20.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments is described.
As shown in Figure 1, hydraulic steering control valve includes main valve 1, guide left oil port a and guide right oil port b, main valve 1 has working oil input port P, tank drainback mouth T and for the work left oil port A being connected with steering cylinder 20 and work right oil port B, selector valve, wherein selector valve includes left selector valve 7 and right selector valve 10, left selector valve 7 is the two-position three-way valve of hydraulic control, it is in its G hydraulic fluid port during left working position and connects with H hydraulic fluid port, and when it is in right working position, H hydraulic fluid port connects with C hydraulic fluid port；Right selector valve 10 is also the two-position three-way valve of hydraulic control, and it is in its E hydraulic fluid port during left working position and connects with F hydraulic fluid port, and when it is in right working position, D hydraulic fluid port connects with E hydraulic fluid port；Guide left oil port a simultaneously with the hydraulic control left end of left selector valve 7, G hydraulic fluid port, right selector valve 10 hydraulic control left end connect, guide right oil port b connects with the right hydraulic control end of the right hydraulic control end of right selector valve, D hydraulic fluid port and left selector valve simultaneously, the H hydraulic fluid port of left selector valve connects with the hydraulic control left end of main valve plug, the C hydraulic fluid port of left selector valve by the second check valve 5 to work right oil port B one-way conduction；The E hydraulic fluid port of right selector valve 10 connects with the hydraulic control right-hand member of main valve plug, right selector valve F hydraulic fluid port by the first check valve 4 to work left oil port one-way conduction.Second check valve the 5, first check valve 4 is ball valve.The C hydraulic fluid port of left selector valve 7 is provided with first throttle valve 6 between the second check valve, and the F hydraulic fluid port of right selector valve is provided with second throttle 11 between the second check valve 5.Main valve is provided with the first oil duct a4 and the second oil duct b4, main valve works in the second oil duct b4 during left position and is turned on to work left oil port by the hydraulic control left end of main valve plug, the end of the second oil duct b4 is connected to the oil inlet end of the first check valve 4, main valve works in the first oil duct a4 during right position and is turned on to work right oil port by main valve plug hydraulic control right-hand member, and the end of the second oil duct is connected to the oil inlet end of the second check valve.First oil duct is provided with the first adjustable throttling.Second oil duct is provided with the second adjustable throttling.Work left oil port A is connected with tank drainback mouth by the first repairing overload overflow valve 14, and work right oil port B is connected with tank drainback mouth by the second repairing overload overflow valve 12.It is connected to relief valve 13 between working oil input port P and tank drainback mouth T.
Fig. 2 to Fig. 7 illustrates the structural representation of this hydraulic steering control valve, as shown in Figures 2 to 7, hydraulic steering control valve includes valve body 1-1 and end cap 1-2, the main valve plug 1-3 of main valve 1 is arranged in valve body 1-1, the valve opening of main valve plug 1-3 arranges nine oil ducts, respectively main valve plug hydraulic control left end oil duct a5 from left to right, second oil duct b4, left back oil road T1, work left oil port oil duct A, working oil input port P, work right oil port oil duct B, right back oil road T2, first oil duct a4, main valve plug hydraulic control right-hand member oil duct b5, left back oil road T1 and right back oil road T2 and tank drainback mouth T conducting.Being additionally provided with left selector valve 7 and right selector valve 10 in valve body 1-1, left selector valve 7 is arranged on the left side of valve body, and right selector valve 10 is arranged on the right side of valve body 1-1.As shown in Figure 5, Figure 7, the left selection spool 7-1 of left selector valve 7 is encapsulated in the left selector valve core bore in valve body 1-1 by left pilot control joint 7-2, left pilot control joint 7-2 sets guide left oil port a, guide left oil port a leads directly to the hydraulic control left end of left selection spool, being provided with main valve plug hydraulic control left end guide oil duct a1, the 3rd oil duct a2, left selection spool hydraulic control right-hand member oil duct a3 in left selector valve core bore from left to right, left selection spool hydraulic control right-hand member oil duct a3 acts on the hydraulic control right-hand member of right selection spool 10-1 and is connected with right guide hydraulic fluid port b.Such as Fig. 4, shown in Fig. 5, the right selection spool 10-1 of right selector valve 10 is encapsulated in the right selector valve core bore in valve body 1-1 by right pilot control joint 10-2, right pilot control joint 10-2 sets guide right oil port b, guide right oil port b leads directly to the hydraulic control right-hand member of right selection spool 10-1, right selector valve core bore is provided with main valve plug hydraulic control right-hand member guide oil duct b1 from right-to-left, 4th oil duct b2, right selection spool hydraulic control left end oil duct b3, wherein guide's right oil port b leads directly to the hydraulic control right-hand member of right selection spool, right selection spool hydraulic control left end oil duct b3 acts on the hydraulic control left end of left selection spool 7-1 and connects with guide left oil port a.First check valve 4 is arranged on the second oil duct b4, and the second check valve 5 is arranged on the first oil duct a4, and first throttle valve 6 is arranged on the 4th oil duct a2, and second throttle 11 is arranged on the 3rd oil duct b2.Also setting up control joint 16 on valve body 1-1, arrange and set P1 mouth on control joint 16, P1 mouth is connected with working oil input port P by the 3rd choke valve 15.
When steering gear is to when being in right commutation position, guide left oil port a has hydraulic oil to input, the T mouth connection fuel tank of the diverted device of guide right oil port b, left selection spool 7-1 is made to be in left position, right selection spool 10-1 is also at left position, G hydraulic fluid port on left selector valve 7 and the conducting of H hydraulic fluid port, C hydraulic fluid port and G hydraulic fluid port, H hydraulic fluid port are turned off, namely guide left oil port a is by the hydraulic control left end oil duct a5 of the straight-through main valve plug of main valve plug hydraulic control left end guide oil duct a1.E hydraulic fluid port and F hydraulic fluid port on right selector valve turn on, D hydraulic fluid port and the cut-off of E hydraulic fluid port, namely main valve plug hydraulic control right-hand member guide oil duct b1 and the four oil duct b2 connection in right selector valve core bore, and the right guide hydraulic fluid port b of main valve plug hydraulic control right-hand member guide oil duct b1 and right pilot control joint 10-2 is separated by right selection spool 10-1.The hydraulic oil of steering gear output passes sequentially through the main valve plug hydraulic control left end guide oil duct a1 in the left guide hydraulic fluid port a of left pilot control joint 7-2, left selector valve core bore and arrives the main valve plug left end hydraulic control end oil duct a5 of main valve plug 1-3, main valve plug 1-3 is made to work in left position, now the second oil duct b4 conducting in main valve core bore, the hydraulic oil in main valve plug hydraulic control left end oil duct a5 is pushed the first check valve 4 arrival open through the second oil duct b4 and is turned to work left oil port A；In the process that main valve plug 1-3 moves from left to right, fluid in the main valve plug right-hand member hydraulic control end oil duct b5 of main valve plug 1-3 is extruded, pass sequentially through the second oil duct b4 in the main valve plug hydraulic control right-hand member guide oil duct b1 on right selection spool 10-1, the 4th oil duct b2, second throttle 11, main valve core bore, first check valve 4 arrive turn to work left oil port A.High pressure liquid force feed working oil input port P in main valve core bore flow to work left oil port oil duct A.The right oil port oil duct B that works then enters tank drainback mouth T through right back oil road T2, so that the flexible realization of hydraulic jack turns to.
When steering gear is to when being in left commutation position, the T mouth connection fuel tank of the diverted device of guide left oil port a, guide right oil port b has hydraulic oil to input, left selection spool 7-1 is made to be in right position, right selection spool 10-1 is also at right position, D hydraulic fluid port and the conducting of E hydraulic fluid port, E hydraulic fluid port and F hydraulic fluid port on right selector valve 10 end, namely the guide right oil port b of right pilot control joint 10-2 is connected with main valve plug hydraulic control right-hand member oil duct b5 by main valve plug hydraulic control right-hand member guide oil duct b1.H hydraulic fluid port on left selector valve 7 and the conducting of C hydraulic fluid port, G hydraulic fluid port and H hydraulic fluid port, C hydraulic fluid port are turned off, namely main valve plug left end hydraulic control end oil duct a5 connects with main valve plug hydraulic control left end guide oil duct a1, and the left guide hydraulic fluid port a of main valve plug hydraulic control left end guide oil duct a1 and left pilot control joint 8 separates, main valve plug hydraulic control left end guide oil duct a1 and the three oil duct a2 connects.The hydraulic oil of steering gear output passes sequentially through the main valve plug hydraulic control right-hand member guide oil duct b1 in the guide right oil port b of right pilot control joint 10-2, right selector valve core bore and arrives the main valve plug right-hand member hydraulic control end oil duct b5 of main valve plug 3, main valve plug is made to work in right position, now the first oil duct a4 conducting in main valve core bore, the hydraulic oil in main valve plug hydraulic control right-hand member oil duct b5 is pushed the second check valve 5 arrival open through the first oil duct a4 and is turned to work right oil port B；In the process that main valve plug 3 right-to-left moves, fluid in main valve plug left end hydraulic control end oil duct a5 is extruded, pass sequentially through the first oil duct a4 in the main valve plug hydraulic control left end guide oil duct a1 on left selection spool 7-1, the 3rd oil duct a2, first throttle valve 6, main valve core bore, second check valve 5 arrive turn to work right oil port B.
Fig. 8 illustrates a kind of hydraulic steering system, this hydraulic system contains steering cylinder 20, load-sensitive steering gear 18, load-reacting pump 17, outside fuel tank, further comprises above-mentioned hydraulic steering control valve 19, the work left oil port A of hydraulic steering control valve 19 connects with the big chamber of steering cylinder 20 and loculus respectively with work right oil port B, the guide left oil port a and guide right oil port b of hydraulic steering control valve 19 are connected with load-sensitive steering gear 18, the working oil input port P of hydraulic steering control valve 19 connects with the pressure oil delivery outlet of load-reacting pump 17, the tank drainback mouth T of hydraulic steering control valve 19 connects with fuel tank, the LS mouth of load-reacting pump connects with the load feedback mouth of load-sensitive steering gear.The guide oil input port of load-sensitive steering gear connects with the control joint P1 mouth on hydraulic steering control valve.
Claims (9)
1. a hydraulic steering control valve, including main valve, guide's left oil port and guide's right oil port, main valve has main valve plug, working oil input port, tank drainback mouth and for the work left oil port that is connected with steering cylinder and the right oil port that works, characterized by further comprising selector valve, described selector valve is connected between main valve and guide's left oil port and guide's right oil port, guide's left oil port is connected with the hydraulic control left end of main valve plug makes main valve plug work in left position or guide's right oil port be connected with the hydraulic control right-hand member of main valve plug make main valve plug work in right position, when main valve plug is operated in left position, the hydraulic control right-hand member of described main valve plug connects with work left oil port, when main valve plug is operated in right position, the hydraulic control left end of described main valve plug connects with work right oil port.
2. hydraulic steering control valve according to claim 1, it is characterized in that described main valve when working in left position the hydraulic control left end of described main valve plug through main valve with work left oil port connect, described main valve when working in right position the hydraulic control right-hand member of described main valve plug through main valve with work right oil port connect.
3. hydraulic steering control valve according to claim 2, it is characterized in that described main valve is provided with the first oil duct and the second oil duct, first oil duct described in when described main valve works in left position by the hydraulic control left end of main valve plug to work left oil port one-way conduction, the second oil duct described in when described main valve works in right position by the hydraulic control right-hand member of main valve plug to work right oil port one-way conduction.
4. hydraulic steering control valve according to any one of claim 1 to 3, it is characterized in that described selector valve includes left selector valve and right selector valve, described left selector valve is the two-position three-way valve of hydraulic control, it is in its G hydraulic fluid port during left working position and connects with H hydraulic fluid port, when it is in right working position, H hydraulic fluid port connects with C hydraulic fluid port, described right selector valve is the two-position three-way valve of hydraulic control, it is in its E hydraulic fluid port during left working position and connects with F hydraulic fluid port, when it is in right working position, D hydraulic fluid port connects with E hydraulic fluid port, with the hydraulic control left end of left selector valve while of described guide's left oil port, G hydraulic fluid port, the hydraulic control left end connection of right selector valve, with the hydraulic control right-hand member of right selector valve while of described guide's right oil port, D hydraulic fluid port connects with the hydraulic control right-hand member of left selector valve, the H hydraulic fluid port of described left selector valve connects with the hydraulic control left end of main valve plug, the C hydraulic fluid port of described left selector valve to work right oil port one-way conduction, described right selector valve E hydraulic fluid port connects with the hydraulic control right-hand member of main valve plug, described right selector valve F hydraulic fluid port to work left oil port one-way conduction.
5. hydraulic steering control valve according to claim 4, it is characterised in that the C hydraulic fluid port of described left selector valve is provided with first throttle valve between work right oil port, the F hydraulic fluid port of described right selector valve is provided with second throttle between work left oil port.
6. hydraulic steering control valve according to claim 1, it is characterised in that described work left oil port and work right oil port are connected with tank drainback mouth each via a repairing overload overflow valve.
7. hydraulic steering control valve according to claim 1, it is characterised in that be connected to relief valve between described working oil input port and tank drainback mouth.
8. hydraulic steering control valve according to claim 3, it is characterised in that be each provided with variable throttle valve on described first oil duct and the second oil duct.
9. a hydraulic steering system, including steering cylinder, load-sensitive steering gear, load-reacting pump, fuel tank, characterized by further comprising the hydraulic steering control valve according to any one of claim 1 to 8, the work left oil port of described hydraulic steering control valve connects with the big chamber of steering cylinder and loculus respectively with work right oil port, guide's left oil port and guide's right oil port of described hydraulic steering control valve are connected with load-sensitive steering gear, the working oil input port of described hydraulic steering control valve connects with the pressure oil delivery outlet of load-reacting pump, the tank drainback mouth of hydraulic steering control valve connects with fuel tank, the LS mouth of load-reacting pump connects with the load feedback mouth of load-sensitive steering gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410405438.8A CN104192201B (en) | 2014-08-18 | 2014-08-18 | Hydraulic steering control valve and hydraulic steering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410405438.8A CN104192201B (en) | 2014-08-18 | 2014-08-18 | Hydraulic steering control valve and hydraulic steering system |
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| CN104192201A CN104192201A (en) | 2014-12-10 |
| CN104192201B true CN104192201B (en) | 2016-06-29 |
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| CN201410405438.8A Active CN104192201B (en) | 2014-08-18 | 2014-08-18 | Hydraulic steering control valve and hydraulic steering system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787111B (en) * | 2015-04-23 | 2018-04-24 | 圣邦集团有限公司 | A kind of control valve for steering |
| CN105201944B (en) * | 2015-09-25 | 2017-10-03 | 广西柳工机械股份有限公司 | Flux amplification valve and steering hydraulic system |
| CN106468292B (en) * | 2016-08-31 | 2018-10-23 | 柳工常州机械有限公司 | A kind of control mechanism of bull-dozer steering cluth |
| CN114183429B (en) * | 2021-12-17 | 2024-06-21 | 徐州阿马凯液压技术有限公司 | Embedded multifunctional bidirectional holding valve oil circuit structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301839Y (en) * | 2008-07-23 | 2009-09-02 | 厦门厦工小型机械有限公司 | Hydraulic pilot control device for minitype loader |
| CN102951198A (en) * | 2012-11-14 | 2013-03-06 | 三一重工股份有限公司 | Vehicle and hydraulic steering driving system |
| CN103085865A (en) * | 2012-11-30 | 2013-05-08 | 广西柳工机械股份有限公司 | Load sensitive turning hydraulic system of loading machine |
| CN103523079A (en) * | 2013-10-22 | 2014-01-22 | 广西柳工机械股份有限公司 | Hydraulic system of mining dump truck |
| CN103671364A (en) * | 2012-09-12 | 2014-03-26 | 上海宝冶集团有限公司 | Steering electrohydraulic control system for remote control loading machine |
-
2014
- 2014-08-18 CN CN201410405438.8A patent/CN104192201B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301839Y (en) * | 2008-07-23 | 2009-09-02 | 厦门厦工小型机械有限公司 | Hydraulic pilot control device for minitype loader |
| CN103671364A (en) * | 2012-09-12 | 2014-03-26 | 上海宝冶集团有限公司 | Steering electrohydraulic control system for remote control loading machine |
| CN102951198A (en) * | 2012-11-14 | 2013-03-06 | 三一重工股份有限公司 | Vehicle and hydraulic steering driving system |
| CN103085865A (en) * | 2012-11-30 | 2013-05-08 | 广西柳工机械股份有限公司 | Load sensitive turning hydraulic system of loading machine |
| CN103523079A (en) * | 2013-10-22 | 2014-01-22 | 广西柳工机械股份有限公司 | Hydraulic system of mining dump truck |
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Effective date of registration: 20230323 Address after: 545000 No. 6, Yangtai Road, Yanghe industrial new area, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Zhongyuan Machinery Co.,Ltd. Patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Address before: 545006 Yanghe North Road, Yanghe Industrial Zone, Liuzhou, the Guangxi Zhuang Autonomous Region, B-14-1 Patentee before: LIUZHOU LIUGONG HYDRAULIC COMPONENTS Co.,Ltd. Patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd. |
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