CN104192201A - Hydraulic steering control valve and hydraulic steering control system - Google Patents

Hydraulic steering control valve and hydraulic steering control system Download PDF

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Publication number
CN104192201A
CN104192201A CN201410405438.8A CN201410405438A CN104192201A CN 104192201 A CN104192201 A CN 104192201A CN 201410405438 A CN201410405438 A CN 201410405438A CN 104192201 A CN104192201 A CN 104192201A
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China
Prior art keywords
hydraulic
valve
port
main valve
oil
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CN201410405438.8A
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CN104192201B (en
Inventor
吴军
蒋拓
章二平
高英达
柯爱国
高名乾
胡云波
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Guangxi Zhongyuan Machinery Co ltd
Guangxi Liugong Machinery Co Ltd
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LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd
Guangxi Liugong Machinery Co Ltd
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Application filed by LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd, Guangxi Liugong Machinery Co Ltd filed Critical LIUZHOU LIUGONG HYDRAULIC PARTS CO Ltd
Priority to CN201410405438.8A priority Critical patent/CN104192201B/en
Publication of CN104192201A publication Critical patent/CN104192201A/en
Application granted granted Critical
Publication of CN104192201B publication Critical patent/CN104192201B/en
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Abstract

The invention relates to hydraulic steering control and discloses a hydraulic steering control valve which solves the problems of low working efficiency and poor operation performance of existing hydraulic steering control. The hydraulic steering control valve comprises a main valve, a left pilot oil port and a right pilot oil port, wherein the main valve is provided with a main valve element, a working oil input port, an oil tank return port, a left working oil port, a right working oil port and a selection valve, and the left working oil port and the right working oil port are used for being connected with a steering oil cylinder. The selection valve is connected between the main valve element and the left pilot oil port and the right pilot oil port, so that the left pilot oil port is communicated with a hydraulic control left end of the main valve element, and the main valve element works at the left position, or the right pilot oil port is communicated with a hydraulic control right end of the main valve element, and the main valve element works at the right position. When the main valve element works at the left position, the hydraulic control right end of the main valve element is communicated with the left working oil port, and when the main valve element works at the right position, the hydraulic control right end of the main valve element is communicated with the right working oil port. The hydraulic steering control valve and a hydraulic steering control system have the advantages of being capable of saving energy and good in operability.

Description

Hydraulic steering control valve and hydrostatic steering system
Technical field
The present invention relates to a kind of fluid-link steering and control, the hydrostatic steering system that relates in particular to a kind of hydraulic steering control valve and there is this hydraulic steering control valve.
Background technology
The existing overwhelming majority's construction machinery and equipment is as loader, and its steering hydraulic system generally adopts quantitative system, and the pump of use is fix-displacement pump.Because steering pump is fix-displacement pump, discharge capacity can not be exported required flow and pressure according to the working conditions change of loader, and the unnecessary flow of steering pump will fall by excess flow loss, and the work efficiency of loader is not high yet, can not reach energy-conservation object.And part machine adopts variable delivery hydraulic system, Hydraulic Elements are nearly all from external high price import, and procurement cycle is very long, so greatly increased the cost of loader.In load-reacting steering swivel system, the delivery rate of steering pump can pass through the swash plate controller of the size adjustment pump of load pressure, by changing swashplate angle, make pump output and the required flow of system, there is no unnecessary flow output, can reach the effect of hydraulic energy-saving.The application of load sensitive system on construction machinery and equipment is a kind of embodiment of green energy conservation theory, is also the construction machinery and equipment development tendency in future, but the current domestic load-sensitive steering control valve more energy-conservation, operating characteristic is more comfortable that also do not have.
Summary of the invention
The object of the invention is to for the above-mentioned shortcoming of existing hydraulic steering control valve and a kind of energy-conservation, hydraulic steering control valve of good operability and the hydrostatic steering system with this hydraulic steering control valve are provided.
Technical scheme of the present invention is achieved in that a kind of hydraulic steering control valve of structure, comprise 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 the work left oil port for being connected with steering cylinder and the right oil port of working, 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 communicated with the hydraulic control left end of main valve plug and makes main valve plug work in left position or guide's right oil port is communicated with the hydraulic control right-hand member of main valve plug to make main valve plug work in right position, described in when main valve plug is operated in left position, the hydraulic control right-hand member of main valve plug is communicated with work left oil port, described in when main valve plug is operated in right position, the hydraulic control left end of main valve plug is communicated 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 is communicated 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 is communicated with work right oil port through main valve.On main valve, be provided with the first oil duct and the second oil duct, main valve work in left when position the first oil duct by the hydraulic control left end of main valve plug to work left oil port one-way conduction, when main valve works in right position the second oil duct by the hydraulic control right-hand member of main valve plug to the conducting of work right oil port.
In above-mentioned hydraulic steering control valve, selector valve comprises left selector valve and right selector valve, left selector valve is the two-position three-way valve of hydraulic control, its its G hydraulic fluid port when left working position is communicated with H hydraulic fluid port, its H hydraulic fluid port when right working position is communicated with C hydraulic fluid port, right selector valve is the two-position three-way valve of hydraulic control, its its E hydraulic fluid port when left working position is communicated with F hydraulic fluid port, its D hydraulic fluid port when right working position is communicated with E hydraulic fluid port, guide's left oil port simultaneously with the hydraulic control left end of left selector valve, G hydraulic fluid port, the hydraulic control left end of right selector valve is communicated with, guide's right oil port simultaneously with the right hydraulic control end of right selector valve, the right hydraulic control end of D hydraulic fluid port and left selector valve is communicated with, the H hydraulic fluid port of left selector valve is communicated with the hydraulic control left end of main valve plug, the C hydraulic fluid port of left selector valve is to work right oil port one-way conduction, right selector valve E hydraulic fluid port is communicated with the hydraulic control right-hand member of main valve plug, right selector valve F hydraulic fluid port is to work left oil port one-way conduction.The C hydraulic fluid port of left selector valve is provided with first throttle valve between right oil port to working, the F hydraulic fluid port of right selector valve is provided with the second flow regulating valve between left oil port to working.
In above-mentioned hydraulic steering control valve, work left oil port is connected with tank drainback mouth by a repairing overload by pass valve separately with work right oil port, when the pressure of working left oil port and working on right oil port surpasses the safe pressure of design, pass through this repairing overload by pass valve overflow pressure relief, when negative pressure appears in work left oil port and work right oil port, by the oil suction from hydraulic reservoir of this valve, carry out repairing.
In above-mentioned hydraulic steering control valve, between working oil input port and tank drainback mouth, be connected with safety valve.
In above-mentioned hydraulic steering control valve, on the first oil duct and the second oil duct, be provided with separately variable throttle valve.
The present invention is for realizing its goal of the invention, a kind of hydrostatic steering system is also provided, comprise steering cylinder, load-sensitive deflector, load-reacting pump, fuel tank, also comprise aforesaid hydraulic steering control valve, the work left oil port of hydraulic steering control valve and work right oil port are communicated with respectively at large chamber and the loculus of steering cylinder, guide's left oil port of hydraulic steering control valve is connected with load-sensitive deflector with guide's right oil port, the working oil input port of hydraulic steering control valve is communicated with the pressure oil delivery port of load-reacting pump, the tank drainback mouth of hydraulic steering control valve is communicated with fuel tank, the LS mouth of load-reacting pump is communicated with the load feedback mouth of load-sensitive deflector.
The present invention compared with prior art, advantage of the present invention: hydraulic steering control valve and the hydrostatic steering system with this hydraulic steering control valve, according to the required flow of power element, automatically regulate the output of pump, and irrelevant with load, hydraulic efficiency pressure system energy-saving effect is obvious.The present invention is by two motions of selecting spool and controlling main valve plug in addition, and pilot control pressure is high pressure, almost consistent with inlet pressure, can not produce high pressure excess flow loss, relative quantification energy saving of system; When pilot control of the present invention is brought in oil, fluid can squeeze and hold working hole check valve and enter steering cylinder through main valve plug commutation end, and the fluid of the main valve plug other end can be clamp-oned to commutation end by valve body oil duct and the working hole check valve held by commutation enters steering cylinder, steering swivel system flow, except a small amount of internal leakage, does not have loss of flow.Cutoff port is set respectively on the back oil road of main valve plug of the present invention two ends separately and in order to limit the too fast of main valve plug, opens, make main valve plug motion relatively steady, and then make to turn to and there is good stationarity.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention;
Fig. 2 is front view structural representation of the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the A-A cutaway view of Fig. 2;
Fig. 5 is the B-B cutaway view of Fig. 3;
Fig. 6 is the D-D cutaway view of Fig. 4;
Fig. 7 is the C-C cutaway view of Fig. 2;
Fig. 8 is hydrostatic 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, the first check valve 4, the 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, the second flow regulating valve 11, the first repairing overload by pass valve 12, safety valve 13, the second repairing overload by pass valve 14, the 3rd flow regulating valve 15, control joint 16, load-reacting pump 17, load-sensitive deflector 18, hydraulic steering control valve 19, steering cylinder 20.
The specific embodiment
Below in conjunction with accompanying drawing explanation specific embodiments.
As shown in Figure 1, hydraulic steering control valve comprises main valve 1, guide's left oil port a and guide's right oil port b, main valve 1 has working oil input port P, tank drainback mouth T and the work left oil port A for being connected with steering cylinder 20 and work right oil port B, selector valve, wherein selector valve comprises left selector valve 7 and right selector valve 10, left selector valve 7 is the two-position three-way valve of hydraulic control, its its G hydraulic fluid port when left working position is communicated with H hydraulic fluid port, and its H hydraulic fluid port when right working position is communicated with C hydraulic fluid port; Right selector valve 10 is also the two-position three-way valve of hydraulic control, and its its E hydraulic fluid port when left working position is communicated with F hydraulic fluid port, and its D hydraulic fluid port when right working position is communicated with E hydraulic fluid port; Guide's left oil port a is communicated with the hydraulic control left end of the hydraulic control left end of left selector valve 7, G hydraulic fluid port, right selector valve 10 simultaneously, guide's right oil port b while is communicated with the right hydraulic control end of right hydraulic control end, D hydraulic fluid port and the left selector valve of right selector valve, the H hydraulic fluid port of left selector valve is communicated with the hydraulic control left end of main valve plug, and the C hydraulic fluid port of left selector valve passes through the second check valve 5 to work right oil port B one-way conduction; The E hydraulic fluid port of right selector valve 10 is communicated with the hydraulic control right-hand member of main valve plug, and right selector valve F hydraulic fluid port passes through the first check valve 4 to work left oil port one-way conduction.The second check valve 5, the first check valve 4 are ball check valve.Between C hydraulic fluid port to the second check valve of left selector valve 7, be provided with first throttle valve 6, between F hydraulic fluid port to the second check valve 5 of right selector valve, be provided with the second flow regulating valve 11.On main valve, be provided with the first oil duct a4 and the second oil duct b4, main valve work in left when position the second oil duct b4 by the hydraulic control left end of main valve plug to the conducting of work left oil port, the end of the second oil duct b4 is connected in the oil inlet end of the first check valve 4, when main valve works in right position, the first oil duct a4 is by main valve plug hydraulic control right-hand member to the conducting of work right oil port, and the end of the second oil duct is connected in the oil inlet end of the second check valve.On the first oil duct, be provided with the first adjustable throttling.On the second oil duct, be provided with the second adjustable throttling.Work left oil port A is connected with tank drainback mouth by the first repairing overload by pass valve 14, and work right oil port B is connected with tank drainback mouth by the second repairing overload by pass valve 12.Between working oil input port P and tank drainback mouth T, be connected with safety valve 13.
Fig. 2 to Fig. 7 shows the structural representation of this hydraulic steering control valve, as shown in Figures 2 to 7, hydraulic steering control valve comprises 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, nine oil ducts are set on the valve opening of main valve plug 1-3, be respectively from left to right main valve plug hydraulic control left end oil duct a5, the 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, the 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.In valve body 1-1, be also provided with left selector valve 7 and right selector valve 10, 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 selection spool bore in valve body 1-1 by left pilot control joint 7-2, on left pilot control joint 7-1, establish guide's left oil port a, the hydraulic control left end of the straight-through left selection spool of guide's left oil port a, in left selection spool bore, be provided with from left to right 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, 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's hydraulic fluid port b.As Fig. 4, shown in Fig. 5, the right selection spool 10-1 of right selector valve 10 is encapsulated in the right selection spool bore in valve body 1-1 by right pilot control joint 10-2, on right pilot control joint 10-2, establish guide's right oil port b, the hydraulic control right-hand member of the straight-through right selection spool 10-1 of guide's right oil port b, in right selection spool bore, from right-to-left, be provided with main valve plug hydraulic control right-hand member guide oil duct b1, the 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 is communicated with guide's left oil port a.It is upper that the first check valve 4 is arranged on the second oil duct b4, and it is upper that the second check valve 5 is arranged on the first oil duct a4, and it is upper that first throttle valve 6 is arranged on the 4th oil duct a2, and the second flow regulating valve 11 is arranged on the 3rd oil duct b2.On valve body 1-1, also arrange and control joint 16, arrange to control on joint 16 and establish P1 mouth, P1 mouth is communicated with working oil input port P by the 3rd flow regulating valve 15.
When deflector is when in right commutation position, guide's left oil port a has high pressure oil input, guide's right oil port b is communicated with fuel tank through the T of deflector mouth, make left selection spool 7-1 in left position, right selection spool 10-1 is also in left position, G hydraulic fluid port on left selector valve 7 and the conducting of H hydraulic fluid port, C hydraulic fluid port all ends with G hydraulic fluid port, H hydraulic fluid port, is also that guide's 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 on right selector valve and the conducting of F hydraulic fluid port, D hydraulic fluid port and the cut-off of E hydraulic fluid port, also be that main valve plug hydraulic control right-hand member guide oil duct b1 in right selection spool bore is communicated with the 4th oil duct b2, and right guide's 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 high pressure oil of deflector output arrives the main valve plug left end hydraulic control end oil duct a5 of main valve plug 1-3 successively by the main valve plug hydraulic control left end guide oil duct a1 in left guide's hydraulic fluid port a of left pilot control joint 7-2, left selection spool bore, make main valve plug 1-3 work in left position, now the second oil duct b4 conducting on main valve plug hole, 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; Main valve plug 1-3 is from left to right in mobile process, fluid in the main valve plug right-hand member hydraulic control end oil duct b5 of main valve plug 1-3 is extruded, and is arrived and is turned to work left oil port A successively by the second oil duct b4 on main valve plug hydraulic control right-hand member guide oil duct b1, the 4th oil duct b2 on right selection spool 10-1, the second flow regulating valve 11, main valve plug hole, the first check valve 4.The working oil input port P of high pressure liquid force feed on main valve plug hole flow to work left oil port oil duct A.Work right oil port oil duct B enters tank drainback mouth T through right back oil road T2, thereby the flexible realization of hydraulic ram is turned to.
When deflector is when in left commutation position, guide's left oil port a is communicated with fuel tank through the T of deflector mouth, guide's right oil port b has high pressure oil input, make left selection spool 7-1 in right position, right selection spool 10-1 is also in right position, D hydraulic fluid port on right selector valve 10 and the conducting of E hydraulic fluid port, E hydraulic fluid port and the cut-off of F hydraulic fluid port, be also that guide's right oil port b of right pilot control joint 10-2 is communicated 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 all ends with H hydraulic fluid port, C hydraulic fluid port, also be that main valve plug left end hydraulic control end oil duct a5 is communicated with main valve plug hydraulic control left end guide oil duct a1, and left guide's 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 is communicated with the 3rd oil duct a2.The high pressure oil of deflector output is successively by the main valve plug right-hand member hydraulic control end oil duct b5 of guide's right oil port b of right pilot control joint 10-2, main valve plug hydraulic control right-hand member guide oil duct b1 arrival main valve plug 3 in right selection spool bore, make main valve plug work in right position, now the first oil duct a4 conducting on main valve plug hole, 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-lefts move, fluid in main valve plug left end hydraulic control end oil duct a5 is extruded, and is arrived and is turned to work right oil port B successively by the first oil duct a4 on main valve plug hydraulic control left end guide oil duct a1, the 3rd oil duct a2 on left selection spool 7-1, first throttle valve 6, main valve plug hole, the second check valve 5.
Fig. 8 shows a kind of hydrostatic steering system, this hydraulic efficiency pressure system has comprised steering cylinder 20, load-sensitive deflector 18, load-reacting pump 17, outside fuel tank, also comprised above-mentioned hydraulic steering control valve 19, the work left oil port A of hydraulic steering control valve 19 and work right oil port B are communicated with large chamber and the loculus of steering cylinder 20 respectively, guide's left oil port a of hydraulic steering control valve 19 is connected with load-sensitive deflector 18 with guide's right oil port b, the working oil input port P of hydraulic steering control valve 19 is communicated with the pressure oil delivery port of load-reacting pump 17, the tank drainback mouth T of hydraulic steering control valve 19 is communicated with fuel tank, the LS mouth of load-reacting pump is communicated with the load feedback mouth of load-sensitive deflector.The guide oil input port of load-sensitive deflector is communicated with the control joint P1 mouth on hydraulic steering control valve.

Claims (9)

1. a hydraulic steering control valve, comprise 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 the work left oil port for being connected with steering cylinder and the right oil port of working, 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 communicated with the hydraulic control left end of main valve plug and makes main valve plug work in left position or guide's right oil port is communicated with the hydraulic control right-hand member of main valve plug to make main valve plug work in right position, described in when main valve plug is operated in left position, the hydraulic control right-hand member of main valve plug is communicated with work left oil port, described in when main valve plug is operated in right position, the hydraulic control left end of main valve plug is communicated with work right oil port.
2. hydraulic steering control valve according to claim 1, it is characterized in that described main valve works in the hydraulic control left end of main valve plug described in left when position and is communicated with work left oil port through main valve, when described main valve works in right described in the hydraulic control right-hand member of main valve plug through main valve, be communicated with the right oil port of working.
3. hydraulic steering control valve according to claim 2, it is characterized in that being provided with on described main valve the first oil duct and the second oil duct, described main valve work in described in left when position the first oil duct by the hydraulic control left end of main valve plug to work left oil port one-way conduction, when described main valve works in right position described in the second oil duct by the hydraulic control right-hand member of main valve plug to work right oil port one-way conduction.
4. according to the hydraulic steering control valve described in any one in claims 1 to 3, it is characterized in that described selector valve comprises left selector valve and right selector valve, the two-position three-way valve that described left selector valve is hydraulic control, its its G hydraulic fluid port when left working position is communicated with H hydraulic fluid port, its H hydraulic fluid port when right working position is communicated with C hydraulic fluid port, the two-position three-way valve that described right selector valve is hydraulic control, its its E hydraulic fluid port when left working position is communicated with F hydraulic fluid port, its D hydraulic fluid port when right working position is communicated with E hydraulic fluid port, described guide's left oil port simultaneously with the hydraulic control left end of left selector valve, G hydraulic fluid port, the hydraulic control left end of right selector valve is communicated with, described guide's right oil port simultaneously with the hydraulic control right-hand member of right selector valve, the hydraulic control right-hand member of D hydraulic fluid port and left selector valve is communicated with, the H hydraulic fluid port of described left selector valve is communicated with the hydraulic control left end of main valve plug, the C hydraulic fluid port of described left selector valve is to work right oil port one-way conduction, described right selector valve E hydraulic fluid port is communicated with the hydraulic control right-hand member of main valve plug, described right selector valve F hydraulic fluid port is to work left oil port one-way conduction.
5. hydraulic steering control valve according to claim 4, the C hydraulic fluid port that it is characterized in that described left selector valve is provided with first throttle valve between right oil port to working, and the F hydraulic fluid port of described right selector valve is provided with the second flow regulating valve between left oil port to working.
6. hydraulic steering control valve according to claim 1, is characterized in that described work left oil port is connected with tank drainback mouth by a repairing overload by pass valve separately with work right oil port.
7. hydraulic steering control valve according to claim 1, is characterized in that being connected with safety valve between described working oil input port and tank drainback mouth.
8. hydraulic steering control valve according to claim 3, is characterized in that being provided with separately variable throttle valve on described the first oil duct and the second oil duct.
9. a hydrostatic steering system, comprise steering cylinder, load-sensitive deflector, load-reacting pump, fuel tank, characterized by further comprising the hydraulic steering control valve described in any one in right 1 to 8, the work left oil port of described hydraulic steering control valve and work right oil port are communicated with large chamber and the loculus of steering cylinder respectively, guide's left oil port of described hydraulic steering control valve is connected with load-sensitive deflector with guide's right oil port, the working oil input port of described hydraulic steering control valve is communicated with the pressure oil delivery port of load-reacting pump, the tank drainback mouth of hydraulic steering control valve is communicated with fuel tank, the LS mouth of load-reacting pump is communicated with the load feedback mouth of load-sensitive deflector.
CN201410405438.8A 2014-08-18 2014-08-18 Hydraulic steering control valve and hydraulic steering system Active CN104192201B (en)

Priority Applications (1)

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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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 true CN104192201A (en) 2014-12-10
CN104192201B CN104192201B (en) 2016-06-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104787111A (en) * 2015-04-23 2015-07-22 圣邦集团有限公司 Control valve for steering system
CN105201944A (en) * 2015-09-25 2015-12-30 广西柳工机械股份有限公司 Flow enlarging valve and hydraulic steering system
CN106468292A (en) * 2016-08-31 2017-03-01 柳工常州机械有限公司 A kind of controlling organization of bull-dozer steering cluth
CN114183429A (en) * 2021-12-17 2022-03-15 徐州阿马凯液压技术有限公司 Embedded multifunctional bidirectional holding valve oil way structure

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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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104787111A (en) * 2015-04-23 2015-07-22 圣邦集团有限公司 Control valve for steering system
CN105201944A (en) * 2015-09-25 2015-12-30 广西柳工机械股份有限公司 Flow enlarging valve and hydraulic steering system
CN106468292A (en) * 2016-08-31 2017-03-01 柳工常州机械有限公司 A kind of controlling organization of bull-dozer steering cluth
CN114183429A (en) * 2021-12-17 2022-03-15 徐州阿马凯液压技术有限公司 Embedded multifunctional bidirectional holding valve oil way structure

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