CN103661587B - The anti-beat valve of a kind of Vehicular turn - Google Patents
The anti-beat valve of a kind of Vehicular turn Download PDFInfo
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- CN103661587B CN103661587B CN201210344593.4A CN201210344593A CN103661587B CN 103661587 B CN103661587 B CN 103661587B CN 201210344593 A CN201210344593 A CN 201210344593A CN 103661587 B CN103661587 B CN 103661587B
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Abstract
The invention discloses the anti-beat valve of a kind of Vehicular turn, is symmetrical formula structure, it is characterized in that comprising valve body (1), valve module of voltage regulation (21) and relief valve assembly (2); Valve body is symmetrically arranged with two oil inlets (A1), (A2) downwards near the outer wall both sides at middle part, and valve body (1) rear wall is symmetrically arranged with two oil outlets (B1), (B2); Two groups of valve module of voltage regulation (21) are symmetricly set in valve body (1) inside, and centre is provided with and controls spool (15), and control spool (15) external diameter and valve body (1) internal diameter free-running fit, two groups of relief valve assemblies (2) are symmetricly set in the top of valve body (1); Oil inlet (A1), (A2) and valve body (1) internal pressure-regulating valve module (21) and control two oil pockets that spool (15) formed and be communicated with respectively.Structure of the present invention is simple, applicability strong, is integrated with the function of two-way hydraulic control pressure regulating valve and two-way safety valve, can meets concrete operating mode when different model, different loads Vehicular turn.
Description
Technical field
The invention belongs to hydrostatic drive and servo technology field, be specifically related to the anti-beat valve of a kind of Vehicular turn.
Background technology
The multi-axle heavy type vehicle of running at high speed is turning to or in craspedodrome process, because back axle inertia is comparatively large and turn to load lower, very easily occurs the phenomenon of vehicle tail beat, and this is the common technique difficult problem that domestic and international multiaxis full size vehicle faces when running at high speed.For solving this intrinsic chronic disease, anti-beat valve can be increased in vehicle rear axle steering hydraulic loop, to coordinate the sequence of operation of front-rear axle when vehicle travels, preventing the beat phenomenon that vehicle rear axle produces prior to propons action.Integrated design two-way safety valve, also can provide over-voltage protecting function to steering hydraulic oil cylinder simultaneously.Through looking into, at present both at home and abroad all without the anti-beat valve of vehicle adopting this form, the present invention is the pioneering of this technical field.
Summary of the invention
The object of the invention is the afterbody beat difficult problem solving the multi-axle heavy type vehicle of running at high speed.
To achieve these goals, technical scheme of the present invention is, the anti-beat valve of a kind of Vehicular turn, is symmetrical formula structure, comprises valve body, valve module of voltage regulation and relief valve assembly; Wherein, valve body is the cuboid of hollow, and be symmetrically arranged with two oil inlets downwards near the outer wall both sides at middle part, valve body rear wall is symmetrically arranged with two oil outlets; Two groups of valve module of voltage regulation are symmetricly set in valve inner, and centre is provided with control spool, and control spool external diameter and valve block internal diameter free-running fit, two groups of relief valve assemblies are symmetricly set in the top of valve body; Oil inlet and valve body internal pressure-regulating valve module with control two cylindrical toroidal hydraulic pressure cavity volumes that spool formed and be communicated with respectively.
When high pressure oil flows into valve inner by side oil inlet, promote side valve module of voltage regulation and control spool respectively to both sides translation, control the valve module of voltage regulation that spool pushes opposite side open simultaneously, two adjusting pressuring valve cores are opened to both sides simultaneously, high-voltage oil liquid is by the flow velocity dashpot between pressuring adjusting valve base and valve body, flow out from side oil outlet, enter power steering hydraulic actuating cylinder corresponding cavity, promote hydraulic actuating cylinder and advance; The fluid in another chamber of power steering hydraulic actuating cylinder flows back to the oil outlet of Vehicular turn anti-beat valve respective side, and the adjusting pressuring valve core opened through this side flows out the oil inlet of valve member homonymy, realizes the closed loop of oil circuit; Because the anti-beat valve of Vehicular turn is symmetrical structure, when high pressure oil enters from oil inlet, the same foregoing description of principle, its oil circulation path and above-mentioned way symmetric.
Described valve module of voltage regulation comprises pressuring adjusting valve base, adjusting pressuring valve core, end cap, pressure regulating valve spring, pressure regulating valve spring perch, adjusting screw(rod), jam nut and dust boot; Wherein, be fixed in valve body after pressuring adjusting valve base overcoat two pass O shape rubber seal by valve body inner stopper, its inside is provided with adjusting pressuring valve core and controls one end push rod of spool; Pressuring adjusting valve base and adjusting pressuring valve core free-running fit, pressuring adjusting valve base cylindrical outer wall and valve inner form annular oil flow dashpot; Adjusting pressuring valve core away from control spool one end be provided with pressure regulating valve spring, be pressed on adjusting pressuring valve core by outside pressure regulating valve spring perch; End cap outside pressure regulating valve spring perch is fixed on valve body by mounting screw, between seal with seal ring; End cap end face opens internal thread hole, and the inside arranges the externally threaded adjusting screw(rod) of band coupling, and be provided with jam nut outside end cap, adjusting screw(rod), adjusting screw(rod) the inner holds out against on pressure regulating valve spring perch; After end cap is fixing, under the spring-force driven dual of pressure regulating valve spring perch and pressure regulating valve spring, compresses adjusting pressuring valve core, make its conical surface and pressuring adjusting valve base endoporus form the hard seal form of the conical surface, and with control spool push rod end face and leave certain interval.
Described relief valve assembly comprises safety valve ball valve core, adjustment pad, safety valve screw plug, safety valve spring and safety valve ball valve seat; Wherein, on flow velocity dashpot, corresponding position arranges safety valve ball valve core, safety valve ball valve core is provided with safety valve ball valve seat, and safety valve ball valve seat is provided with safety valve screw plug, is provided with successively from top to bottom and adjusts pad and safety valve spring between safety valve ball valve seat and safety valve screw plug; The cavity volume formed between safety valve screw plug and safety valve ball valve seat, by the plagioclase hole of valve inner, i.e. safety valve liquid flow channel for oil, is linked up with the annular chamber controlling spool.The valve outer wall welding tee discharge outlet of described oil outlet, the outlet of below parallel connection arranges the pressure measurement interface of negative thread form, under normal state, pressure measurement interface assembles the pressure measurement screw plug of external thread form, Bonding pressure detecting device during valve member trouble diagnosing.
Described oil inlet is set to inclined hole, and the inner machining internal thread of welding straight coupling of oil inlet, arranges the damping screw of external thread form.
Described control cock outer core and valve interior wall contact site are provided with some annular balancing slits, its role is to the radial imbalance force compensated or counteracting fluid produces when flowing through spool and valve body gap, reducing hydraulic card clamping force.
Described adjusting pressuring valve core and pressuring adjusting valve base contact internal walls position are provided with some annular balancing slits, its role is to the radial imbalance force compensated or counteracting fluid produces when flowing through spool and valve body gap, reducing hydraulic card clamping force.
Beneficial effect of the present invention is: (1) the present invention is applied on Vehicular turn hydraulic circuit, by increasing anti-beat valve in hydraulic circuit, effectively coordinate the sequence of operation of front-rear axle in steering procedure, ensure that the stability of vehicle high-speed straight-line travelling, when having captured multi-axle heavy type high vehicle speeds, a guardian technique difficult problem for afterbody beat, improves the adaptive capacity to environment of multi-axle heavy type special vehicle; (2) design size of the present invention is compact, structure is simple, applicability is strong, generalization degree is high, be integrated with the function of two-way hydraulic control pressure regulating valve and two-way safety valve, the response pressure value of each spool is all adjustable, can meet concrete operating mode when different model, different loads Vehicular turn.
Accompanying drawing explanation
Fig. 1 is the elevational cross-sectional view of the anti-beat valve of a kind of Vehicular turn.
Fig. 2 is the C-C face cutaway view of the anti-beat valve of a kind of Vehicular turn.
In figure, 1-valve body, 2-pressuring adjusting valve base, 3-adjusting pressuring valve core, 4-end cap, 5-pressure regulating valve spring, 6-pressure regulating valve spring perch, 7-adjusting screw(rod), 8-jam nut, 9-dust boot, 10-safety valve ball valve core, 11-adjusts pad, 12-safety valve screw plug, 13-safety valve spring, 14-safety valve ball valve seat, 15-controls spool, 16-damping screw, 17-pressure measurement screw plug, 18-flow velocity dashpot, 19-pressuring adjusting valve base through flow hole, 20-safety valve liquid flow channel for oil, 21-valve module of voltage regulation, 22-relief valve assembly, A1, A2-oil inlet, B1, B2-oil outlet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described further.
The present invention is applied to Vehicular turn hydraulic circuit, arranges the anti-beat valve of Vehicular turn in the positive and negative chamber of power steering hydraulic actuating cylinder, and the positive and negative chamber hydraulic fluid port of servo cylinder connects two oil outlet B1, B2 of the anti-beat valve of Vehicular turn respectively; The anti-beat valve of Vehicular turn comprises double-channel voltage-regulating valve module 21 and two-way safety valve module 22.By the load regulating the response pressure of valve module of voltage regulation 21 to regulate vehicle rear axle steering hydraulic power-assisted oil cylinder, during to coordinate Vehicular turn, the sequence of operation of front-rear axle, prevents the vehicle beat that vehicle rear axle produces prior to propons action; Realized the over-voltage protecting function of steering hydraulic power-assisted oil cylinder by two-way safety valve module 22, prevent because of adjusting pressuring valve core 3 clamping stagnation etc. cause valve module of voltage regulation 21 to open time, passively turn to the hydraulic actuating cylinder overpressure problems caused.Carrying out practically mode is exemplified below:
Oil outlet B1, B2 connect the positive and negative chamber of steering hydraulic power-assisted oil cylinder, high-voltage oil liquid by oil inlet A1 after damping screw 16 current stabilization noise reduction, enter and control spool 15 left end cavity, high pressure oil promotes to control spool 15 and moves right, back down the adjusting pressuring valve core 3 of oil inlet A2 oil circuit side, realize the connection of oil outlet B2 to oil inlet A2 fluid loop; Simultaneously after high pressure oil pressure increases above the setting pressure of oil inlet A1 mouth side adjusting pressuring valve core 3, promote adjusting pressuring valve core 3 axially to move to left, valve module of voltage regulation 21 is opened, high pressure oil enters the positive chamber of steering cylinder by oil outlet B1, promote steering cylinder motion and realize Vehicular turn action, the fluid in the anti-chamber of hydraulic actuating cylinder passes through oil outlet B2 again to the loop off-load of oil inlet A2 fluid.In like manner, high-voltage oil liquid also can be entered by A2 mouth, realizes same function.
Suppose the adjusting pressuring valve core 3 motion clamping stagnation controlling spool 15 or oil inlet A2 mouth, oil outlet B2 cannot be opened to oil inlet A2 fluid loop, steering jack is motion under the pulling of vehicle leverage, but vent line shutoff cannot discharge fluid, oil cylinder internal pressure will be made to raise, cause the passive of vehicle to turn to; When vehicle leverage pulling force is excessive, oil cylinder internal pressure is too high, also can produce the danger that hydraulic actuating cylinder builds the pressure; Therefore at each pressure regulating valve oil circuit reverse parallel connection collateral branch Qiao Lu; safety valve 22 assembly is set overload protection function is provided; when oil pressure in hydraulic actuating cylinder raises; when exceeding the pressure of relief valve assembly 22 setting; safety valve ball valve core 10 is pushed upwardly; open safe unloading pressure loop, the fluid in hydraulic actuating cylinder flows out through safety valve liquid flow channel for oil 20, avoids the passive of vehicle to turn to the risk built the pressure with hydraulic actuating cylinder.
The anti-beat valve of above-mentioned a kind of Vehicular turn, is symmetrical formula structure, as shown in Figure 1 and Figure 2, comprises valve body 1, valve module of voltage regulation 21 and relief valve assembly 22; Wherein, valve body 1 is the cuboid of hollow, and be symmetrically arranged with two oil inlets A1, A2 downwards near the outer wall both sides at middle part, valve body 1 rear wall is symmetrically arranged with two oil outlets B1, B2; Two groups of valve module of voltage regulation 21 are symmetricly set in valve body 1 inside, and centre is provided with and controls spool 15, and control spool 15 external diameter and valve body 1 internal diameter free-running fit, two groups of relief valve assemblies 22 are symmetricly set in the top of valve body 1; Oil inlet A1, A2 and valve body 1 internal pressure-regulating valve module 21 with control two cylindrical toroidal hydraulic pressure cavity volumes that spool 15 formed and be communicated with respectively; Control spool 15 outer wall and valve body 1 contact internal walls position are provided with some annular balancing slits, with the radial imbalance force of compensatory control spool 15.Oil inlet A1, A2 are arranged damping screw 16, its effect carries out current stabilization noise reduction to the high pressure oil entered.Fluid, after damping screw 16, enters the annular chamber controlling spool 15 along inclined hole.Oil outlet B1, B2 are welding tee joint, and the outlet of below parallel connection arranges the pressure measurement interface of negative thread form; The pressure measurement screw plug 17 of external thread form is assembled, when backing out pressure measurement screw plug 17 for during valve member trouble diagnosing, Bonding pressure detecting device under normal state.
Valve module of voltage regulation 21 comprises pressuring adjusting valve base 2, adjusting pressuring valve core 3, end cap 4, pressure regulating valve spring 5, pressure regulating valve spring perch 6, adjusting screw(rod) 7, jam nut 8 and dust boot 9; Wherein, be fixed in valve body 1 after pressuring adjusting valve base 2 overcoat two pass O shape rubber seal by valve body 1 inner stopper, its inside is provided with adjusting pressuring valve core 3 and controls one end push rod of spool 15; Pressuring adjusting valve base 2 and adjusting pressuring valve core 3 free-running fit, pressuring adjusting valve base 2 cylindrical outer wall and valve body 1 inside form annular oil flow dashpot 18; Adjusting pressuring valve core 3 away from control spool 15 one end be provided with pressure regulating valve spring 5, be pressed on adjusting pressuring valve core 3 by outside pressure regulating valve spring perch 6; End cap 4 outside pressure regulating valve spring perch 6 is fixed on valve body 1 by mounting screw, between seal with seal ring; End cap 4 end face opens internal thread hole, the inside arranges the externally threaded adjusting screw(rod) 7 of band coupling, jam nut 8 is provided with outside end cap 4, adjusting screw(rod) 7, adjusting screw(rod) 7 the inner holds out against on pressure regulating valve spring perch 6, the position of adjustable pressure regulating valve spring perch 6, is locked at desired location with jam nut 8 by adjusting screw(rod) 7 after adjusting to the right place; After end cap 4 is fixing, under the spring-force driven dual of pressure regulating valve spring perch 6 and pressure regulating valve spring 5, compresses adjusting pressuring valve core 3, make its conical surface and pressuring adjusting valve base 2 endoporus form the hard seal form of the conical surface, and with control spool 15 push rod end face and leave certain interval; Adjusting pressuring valve core 3 and pressuring adjusting valve base 2 contact internal walls position are provided with some annular balancing slits, to compensate the radial imbalance force of adjusting pressuring valve core 3; The response pressure of both sides valve module of voltage regulation 21 is set by the adjusting screw(rod) 7 of both sides respectively, adjusting screw(rod) 7 is according to the sequence of operation of different vehicle load, inertia and forward and backward bridge steering hydraulic oil cylinder, set up the response pressure of adjusting pressuring valve core 3, improve the startup load of rear-axle steering oil cylinder, effectively can prevent the vehicle tail beat problem that back axle produces prior to propons action, and adapt to the specific demand of different model heavy-duty vehicle.After adjusting screw(rod) 7 is adjusted to the right place, position is locked by jam nut 8, and cover dust boot 9 is protected.
Relief valve assembly 22 comprises safety valve ball valve core 10, adjustment pad 11, safety valve screw plug 12, safety valve spring 13, safety valve ball valve seat 14; Wherein, on flow velocity dashpot 18, corresponding position arranges safety valve ball valve core 10, safety valve ball valve core 10 is provided with safety valve ball valve seat 14, safety valve ball valve seat 14 is provided with safety valve screw plug 12, be provided with successively from top to bottom between safety valve ball valve seat 14 and safety valve screw plug 12 and adjust pad 11 and safety valve spring 13, the response pressure of relief valve assembly 22 is determined by the pre compressed magnitude adjusting pad 11 regulation safety valve spring 13, and protection oil cylinder is no more than rated pressure scope; The cavity volume formed between safety valve screw plug 12 and safety valve ball valve seat 14 is by the plagioclase hole of valve body 1 inside, i.e. safety valve liquid flow channel for oil 20, links up with the annular chamber controlling spool 15; When valve module of voltage regulation 21 breaks down, the fluid of hydraulic actuating cylinder oil back chamber flows out loop by the relief valve assembly 22 of respective side.
When motion clamping stagnation or other problems appear in the valve module of voltage regulation 21 controlling spool 15 or fuel-displaced side, when cannot open out oil return line, steering jack is motion under the pulling of vehicle leverage, but vent line shutoff cannot discharge fluid, oil cylinder internal pressure will be made to raise, cause the passive of vehicle to turn to; When vehicle leverage pulling force is excessive, oil cylinder internal pressure is too high, also can produce the danger that hydraulic actuating cylinder builds the pressure; Therefore at each pressure regulating valve oil circuit reverse parallel connection collateral branch Qiao Lu; relief valve assembly 22 is set overload protection function is provided; when oil pressure in hydraulic actuating cylinder raises; when exceeding the pressure of relief valve assembly 22 setting; safety valve ball valve core 10 is backed down; open safe unloading pressure loop, avoid the passive of vehicle to turn to the risk built the pressure with hydraulic actuating cylinder.
The valve outer wall welding tee discharge outlet of oil outlet B1, B2, the outlet of below parallel connection arranges the pressure measurement interface of negative thread form; Assemble the pressure measurement screw plug 17 of external thread form under normal state, when pressure measurement screw plug can be backed out for during valve member trouble diagnosing, Bonding pressure detecting device, as compression indicator or pressure sensor etc., carry out trouble diagnosing.
The inner machining internal thread of welding straight coupling of oil inlet A1, A2, arrange the damping screw of external thread form, its effect carries out current stabilization noise reduction to the high pressure oil entered; Damping hole diameter can need to mate according to system, reduces hydraulic efficiency impact and avoids valve member to utter long and high-pitched sounds; Fluid, after damping screw, enters the annular chamber controlling spool along inclined hole; Oil inlet is set to inclined hole, can make liquid flow to into during valve pocket with certain axial component, to compensate or to offset part steady-state fluid force.
Above embodiments of the invention are explained in detail, above-mentioned embodiment is only optimum embodiment of the present invention, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (7)
1. the anti-beat valve of Vehicular turn is symmetrical formula structure, it is characterized in that comprising valve body (1), valve module of voltage regulation (21) and relief valve assembly (22); Wherein, the cuboid that valve body (1) is hollow, be symmetrically arranged with two oil inlets (A1), (A2) downwards near the outer wall both sides at middle part, valve body (1) rear wall is symmetrically arranged with two oil outlets (B1), (B2); Two groups of valve module of voltage regulation (21) are symmetricly set in valve body (1) inside, and centre is provided with and controls spool (15), and control spool (15) external diameter and valve body (1) internal diameter free-running fit, two groups of relief valve assemblies (22) are symmetricly set in the top of valve body (1); Oil inlet (A1), (A2) and valve body (1) internal pressure-regulating valve module (21) and control two cylindrical toroidal hydraulic pressure cavity volumes that spool (15) formed and be communicated with respectively.
2. the anti-beat valve of a kind of Vehicular turn as claimed in claim 1, is characterized in that valve module of voltage regulation (21) comprises pressuring adjusting valve base (2), adjusting pressuring valve core (3), end cap (4), pressure regulating valve spring (5), pressure regulating valve spring perch (6), adjusting screw(rod) (7), jam nut (8) and dust boot (9); Wherein, be fixed in valve body (1) after pressuring adjusting valve base (2) overcoat two pass O shape rubber seal by valve body (1) inner stopper, its inside is provided with adjusting pressuring valve core (3) and controls one end push rod of spool (15); Pressuring adjusting valve base (2) and adjusting pressuring valve core (3) free-running fit, pressuring adjusting valve base (2) cylindrical outer wall and valve body (1) inside form annular oil flow dashpot (18); Adjusting pressuring valve core (3) away from control spool (15) one end be provided with pressure regulating valve spring (5), be pressed on adjusting pressuring valve core (3) by outside pressure regulating valve spring perch (6); Pressure regulating valve spring perch (6) outside end cap (4) be fixed on valve body (1) by mounting screw, between seal with seal ring; End cap (4) end face opens internal thread hole, and the inside arranges the band externally threaded adjusting screw(rod) of coupling (7), and end cap (4), adjusting screw(rod) (7) outside is provided with jam nut (8), and adjusting screw(rod) (7) the inner holds out against on pressure regulating valve spring perch (6); After end cap (4) is fixing, under the spring-force driven dual of pressure regulating valve spring perch (6) and pressure regulating valve spring (5), compress adjusting pressuring valve core (3), make its conical surface and pressuring adjusting valve base (2) endoporus form the hard seal form of the conical surface, and leave certain interval with control spool (15) push rod end face.
3. the anti-beat valve of a kind of Vehicular turn as claimed in claim 1, is characterized in that relief valve assembly (22) comprises safety valve ball valve core (10), adjustment pad (11), safety valve screw plug (12), safety valve spring (13) and safety valve ball valve seat (14), wherein, the upper corresponding position of flow velocity dashpot (18) arranges safety valve ball valve core (10), safety valve ball valve core (10) is provided with safety valve ball valve seat (14), safety valve ball valve seat (14) is provided with safety valve screw plug (12), be provided with successively from top to bottom between safety valve ball valve seat (14) and safety valve screw plug (12) and adjust pad (11) and safety valve spring (13), the cavity volume formed between safety valve screw plug (12) and safety valve ball valve seat (14) is by the plagioclase hole of valve body (1) inside, i.e. safety valve liquid flow channel for oil (20), link up with the annular chamber controlling spool (15).
4. the anti-beat valve of a kind of Vehicular turn as claimed in claim 1, it is characterized in that valve body (1) oil outlet (B1), (B2) be welding tee joint, the outlet of below parallel connection arranges the pressure measurement interface of negative thread form; The pressure measurement screw plug (17) of external thread form is assembled, when for pressure measurement screw plug (17) can be backed out during valve member trouble diagnosing, Bonding pressure detecting device under normal state.
5. the anti-beat valve of a kind of Vehicular turn as claimed in claim 1, is characterized in that the inner machining internal thread of welding straight coupling of oil inlet (A1), (A2), arranges the damping screw (16) of external thread form respectively; Fluid enters the annular chamber controlling spool (15) after damping screw (16) along inclined hole.
6. the anti-beat valve of a kind of Vehicular turn as claimed in claim 1, is characterized in that control spool (15) outer wall and valve body (1) contact internal walls position are provided with some annular balancing slits.
7. the anti-beat valve of a kind of Vehicular turn as claimed in claim 2, is characterized in that adjusting pressuring valve core (3) and pressuring adjusting valve base (2) contact internal walls position are provided with some annular balancing slits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344593.4A CN103661587B (en) | 2012-09-17 | 2012-09-17 | The anti-beat valve of a kind of Vehicular turn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210344593.4A CN103661587B (en) | 2012-09-17 | 2012-09-17 | The anti-beat valve of a kind of Vehicular turn |
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| Publication Number | Publication Date |
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| CN103661587A CN103661587A (en) | 2014-03-26 |
| CN103661587B true CN103661587B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210344593.4A Active CN103661587B (en) | 2012-09-17 | 2012-09-17 | The anti-beat valve of a kind of Vehicular turn |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469305A (en) * | 1973-07-17 | 1977-04-06 | Bosch Gmbh Robert | Hydraulic servo steering systems for motor vehicles |
| US4410058A (en) * | 1981-12-10 | 1983-10-18 | Trw Inc. | Vehicle steering apparatus |
| CN201280128Y (en) * | 2007-09-19 | 2009-07-29 | 德尔菲技术公司 | Vehicle hydraulic system |
| CN102285373A (en) * | 2010-06-18 | 2011-12-21 | 江苏罡阳动力转向器厂 | Power steering gear with safety valve structure |
| CN102442347A (en) * | 2011-11-07 | 2012-05-09 | 沙市久隆汽车动力转向器有限公司 | Emergency valve for double-loop power-assisted steering device |
| CN202806862U (en) * | 2012-09-17 | 2013-03-20 | 北京航天发射技术研究所 | Vehicle steering anti-deflection valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188751A (en) * | 2000-12-25 | 2002-07-05 | Unisia Jecs Corp | Pressure control valve |
-
2012
- 2012-09-17 CN CN201210344593.4A patent/CN103661587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469305A (en) * | 1973-07-17 | 1977-04-06 | Bosch Gmbh Robert | Hydraulic servo steering systems for motor vehicles |
| US4410058A (en) * | 1981-12-10 | 1983-10-18 | Trw Inc. | Vehicle steering apparatus |
| CN201280128Y (en) * | 2007-09-19 | 2009-07-29 | 德尔菲技术公司 | Vehicle hydraulic system |
| CN102285373A (en) * | 2010-06-18 | 2011-12-21 | 江苏罡阳动力转向器厂 | Power steering gear with safety valve structure |
| CN102442347A (en) * | 2011-11-07 | 2012-05-09 | 沙市久隆汽车动力转向器有限公司 | Emergency valve for double-loop power-assisted steering device |
| CN202806862U (en) * | 2012-09-17 | 2013-03-20 | 北京航天发射技术研究所 | Vehicle steering anti-deflection valve |
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| CN103661587A (en) | 2014-03-26 |
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