CN102336216A - Normal-pressure hydraulic steering valve and steering system - Google Patents
Normal-pressure hydraulic steering valve and steering system Download PDFInfo
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- CN102336216A CN102336216A CN2011101876669A CN201110187666A CN102336216A CN 102336216 A CN102336216 A CN 102336216A CN 2011101876669 A CN2011101876669 A CN 2011101876669A CN 201110187666 A CN201110187666 A CN 201110187666A CN 102336216 A CN102336216 A CN 102336216A
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Abstract
The invention discloses a normal-pressure hydraulic steering valve and a steering system, capable of realizing normal-pressure hydraulic power-assisted steering. The steering valve comprises a valve sleeve and a valve core. An oil inlet, an upper cavity groove and a lower cavity groove are arranged on the valve sleeve. The upper cavity groove and the lower cavity groove are respectively communicated with upper and lower cavities of a steering working cylinder. An oil inlet groove and an oil return communication groove are arranged on the side wall of the valve core. The positions and the widths of the oil inlet groove and the oil inlet of the valve sleeve correspond with each other, so that an oil inlet communication oil path is formed. The positions and the widths of the oil return communication groove, the upper cavity groove and the lower cavity groove of the valve sleeve correspond with each other, so that an oil return communication oil path is formed. The steering system is communicated with an oil storage cylinder through the oil return communication groove on the valve core of the steering valve so that the oil return is realized. According to the technical proposal, the structure of the steering valve is simplified; the processing and assembling process is simpler; the oil return oil path of the hydraulic steering system is changed; and the application performance and the reliability of the steering valve and the normal-pressure stirring system are increased.
Description
Technical field
The present invention relates to automotive steering structure, concrete is a kind of gerotor type hydraulic power steering valve and the steering swivel system that uses this convertible valve.
Background technology
Automobile assisted power steering mechanism is the vitals of Vehicular turn, directly influences the steering operation of driver in driving procedure.The assisted power steering system major part is to provide hydraulic pressure or air pressure can change into the power steering ability through the propulsion source that adds, and accomplishes steering operation to help the driver.Hydraulic efficiency pressure system compares that pressure system is little because of its work noise, short be used widely delay time.Hydraulic power steering system is divided into gerotor type and permanent current formula, and permanent current formula hydrostatic steering system is simple in structure because of it, leakage becomes the maximum steering swivel system of use on the present automobile less.
But because the fluid in the permanent current formula hydraulic efficiency pressure system need keep mobile, then propulsion source need provide power incessantly, when no steering situation, still needs power consumption.Secondly, permanent current formula system just sets up system pressure after turning to, and low-response need use more high-performance propulsion source for improving speed of response, has improved the use cost of system, and has not been suitable for heavy-duty vehicle.
The widely used a kind of convertible valve of permanent current formula is made up of two spools that cooperatively interact and valve pocket at present in addition; Be communicated with hydraulic circuit and turn to clutch release slave cylinder through on spool and valve pocket, driving oil outlet and valve pool into; When convertible valve rotates; Through the position relationship change of oilhole and valve pool, thereby control gets into the pressure and the flow of the flow that turns to clutch release slave cylinder one side, promotes to turn to the slave cylinder piston motion; For turning to a side that power-assisted is provided, turn to the fuel return hole oil return of clutch release slave cylinder opposite side fluid on shift valve spool or valve pocket to oil storage cylinder.Promptly on valve pocket, drive on oilhole and the spool valve pocket and open outside the valve pool; Also need on spool or valve pocket, open a plurality of fuel return holes; Except necessary manufacturing procedure and cost; Influential to convertible valve self intensity, and the moulding size of fuel return hole promptly fixed the oil return flow that is passed through, and is unfavorable for return flow control automatically in steering procedure.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of prior art; A kind of gerotor type fluid-link steering valve and steering swivel system of realizing the gerotor type hydraulic power-assisted steering is provided; Simplified the convertible valve structure; Processing and assembling are simpler, have changed the oil return circuit of steering swivel system, have improved the in-use performance and the reliability of convertible valve and normal pressure system.
The present invention solves its technical matters and takes following scheme to realize: a kind of gerotor type fluid-link steering valve; Comprise valve pocket and spool; Have on the valve pocket fuel feed hole, with epicoele groove that turns to the clutch release slave cylinder upper and lower cavity to be communicated with respectively and cavity of resorption groove; Have oil feed groove, oil return connectivity slot on the said spool sidewall, oil feed groove is corresponding with said valve pocket fuel feed hole position and width, is communicated with oil circuit as oil-feed; The oil return connectivity slot is corresponding with following cavity groove position and width with the epicoele groove of said valve pocket, is communicated with oil circuit as oil return.
Said oil return connectivity slot is the parallel slot that is parallel to the spool bus.
Oil feed groove on the said spool sidewall is the osed top groove.
Said oil feed groove width is corresponding with chamber well width on the valve pocket, satisfies under the convertible valve normality not have with epicoele groove and cavity of resorption groove to be communicated with, and when convertible valve is worked, is communicated with epicoele groove or cavity of resorption groove.
Said oil return connectivity slot width is corresponding with chamber well width on the valve pocket, satisfies under the convertible valve normality to be communicated with epicoele groove and cavity of resorption groove, when convertible valve is worked, is communicated with epicoele groove or cavity of resorption groove.
The scheme that the present invention solves its technical matters also comprises:
A kind of gerotor type hydrostatic steering system; Comprise and turn to input shaft, motor, oil pump, oil storage cylinder, energy storage, turn to clutch release slave cylinder; Adopt one of above-mentioned gerotor type fluid-link steering valve, said gerotor type fluid-link steering valve is communicated with said oil storage cylinder through the oil return connectivity slot end of spool.
This gerotor type hydrostatic steering system comprises following mode of operation:
When nothing turns to; The fuel feed hole of the fluid of oil storage cylinder on oil pump, energy storage, valve pocket gets into and is stored in the oil feed groove; Valve pocket epicoele groove is communicated with and all is communicated with oil storage cylinder through the oil return connectivity slot with the cavity of resorption groove, turns to the piston two ends balance in the clutch release slave cylinder, and the convertible valve inner fluid does not have mobile.
When right steering takes place; Turn to input shaft to clockwise rotate certain angle; Oil feed groove is communicated with fuel feed hole with the cavity of resorption groove, the connectivity slot of oil return simultaneously cuts off with the cavity of resorption groove after turning over certain angle, is communicated with the epicoele groove; High-voltage oil liquid gets into through fuel feed hole, oil feed groove, cavity of resorption groove and turns to the clutch release slave cylinder cavity of resorption, the fluid that promotes piston motion and will turn to the clutch release slave cylinder epicoele through epicoele groove, the oil return of oil return connectivity slot to oil storage cylinder.
When left steering takes place; Turn to input shaft to rotate counterclockwise certain angle; Oil feed groove is communicated with fuel feed hole with the epicoele groove, the connectivity slot of oil return simultaneously cuts off with the epicoele groove after turning over certain angle, is communicated with the cavity of resorption groove; High-voltage oil liquid gets into through fuel feed hole, oil feed groove, epicoele groove and turns to the clutch release slave cylinder epicoele, the fluid that promotes piston motion and will turn to the clutch release slave cylinder cavity of resorption through cavity of resorption groove, the oil return of oil return connectivity slot to oil storage cylinder.
Than prior art, the advantage of present technique scheme is:
Closely cooperate and the position width control of oil feed groove, oil return connectivity slot realizes the gerotor type hydraulic power-assisted steering through shift valve spool and valve pocket; Than existing most of permanent current formula hydraulic steering mechanisms; Utilize energy storage savings pressure ability; Can use the oil pump of low discharge, under the out-of-run situation of oil pump, keep certain afterburning ability that turns to, be specially adapted to heavy-duty vehicle.
Open the structure that fuel return hole realizes turning to the oil return of clutch release slave cylinder cavity on shift valve spool or the valve pocket than existing the employing; The present technique scheme adopts the oil return connectivity slot of spool sidewall to be communicated with oil storage cylinder and realizes oil return; Saved the operation of on spool or valve pocket, opening fuel return hole, processing is simple, saves man-hour and manufacturing cost; The intensity of shift valve spool and valve pocket and the service life of convertible valve have been improved; Improved the reliability of gerotor type hydrostatic steering system, and, realized the automatic oil return flow control with the change in location of oil return connectivity slot and upper and lower cavity groove.
Description of drawings
Fig. 1 is a gerotor type fluid-link steering valve normality structural representation of the present invention;
Fig. 2 is a gerotor type fluid-link steering valve operating conditions structural representation of the present invention;
Fig. 3 is gerotor type hydrostatic steering system of the present invention oil circuit scheme drawing under no steering situation;
Fig. 4 is gerotor type hydrostatic steering system of the present invention oil circuit scheme drawing under steering situation.
The specific embodiment
Below in conjunction with embodiment, technical scheme of the present invention is further specified, following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
Shown in Fig. 1-4, the 1st, valve pocket, the 2nd, spool, the 3rd, fuel feed hole, the 4th, oil feed groove, the 5th, oil return connectivity slot; The 6th, the epicoele groove, the 7th, the cavity of resorption groove, the 8th, turn to clutch release slave cylinder, the 81st, epicoele, the 82nd, cavity of resorption; The 9th, energy storage, the 10th, oil pump, the 11st, motor, the 12nd, oil storage cylinder, the 13rd, turn to input shaft.
A kind of gerotor type fluid-link steering valve of present embodiment; Comprise valve pocket 1 and spool 2; The outer wall of spool 2 and valve pocket 1 inwall can rotate but intercept fluid; Have on the valve pocket 1 fuel feed hole 3, with epicoele groove 6 and cavity of resorption groove 7 that epicoele that turns to clutch release slave cylinder 8 81 and cavity of resorption 82 are communicated with respectively, present embodiment adopts three groups of inlet and outlet of fuel channel, promptly has three fuel feed holes 3 and three epicoele grooves 6 and three cavity of resorption grooves 7 of equal angles spacing on the valve pocket 1.
Have oil feed groove 4, oil return connectivity slot 5 on spool 2 sidewalls, oil feed groove 3 is corresponding with valve pocket fuel feed hole 3 positions and width, is communicated with oil circuit as oil-feed; Oil return connectivity slot 5 is corresponding with cavity of resorption groove 7 positions and width with the epicoele groove 6 of said valve pocket, is communicated with oil circuit as oil return.Oil return connectivity slot 5 is for being parallel to the parallel slot of spool bus.Oil feed groove 4 on the spool sidewall is the osed top groove, is not communicated with spool 2 two ends.
Fig. 1 is a convertible valve normality scheme drawing, scheme drawing when Fig. 2 works for convertible valve.The width of oil feed groove 4 is corresponding with upper and lower cavity well width and position on the valve pocket 2, satisfies when the convertible valve normality all not have with epicoele groove and cavity of resorption groove to be communicated with, and fluid is stored in the oil feed groove 4.Oil feed groove 4 is communicated with epicoele groove 6 or cavity of resorption groove 7 when convertible valve is worked.
Oil return connectivity slot 5 width are corresponding with upper and lower cavity well width and position on the valve pocket 2, satisfy under the convertible valve normality to be communicated with epicoele groove 6 and cavity of resorption groove 7, when convertible valve is worked, are communicated with epicoele groove 6 or cavity of resorption groove 7.
Another embodiment of present technique scheme is a kind of gerotor type hydrostatic steering system such as Fig. 3,
Comprise and turn to input shaft 13, motor 11, oil pump 10, oil storage cylinder 12, energy storage 9, turn to clutch release slave cylinder 8; Adopt aforesaid gerotor type fluid-link steering valve; Motor 11 drives oil pump 10 fluid in the oil storage cylinder 12 is pumped to energy storage 9 inner product pressure accumulation power, and the fuel-displaced pipeline of energy storage 9 is connected to the fuel feed hole 3 of aforementioned convertible valve, and the epicoele groove 6 of convertible valve connects the epicoele 81 that turns to clutch release slave cylinder 8; Cavity of resorption groove 7 connects cavity of resorption 82, and the oil return connectivity slot 5 of convertible valve is communicated with oil storage cylinder 12.
The gerotor type hydrostatic steering system of present embodiment comprises following mode of operation:
When nothing turns to; The fuel feed hole 3 of the fluid of oil storage cylinder 12 on oil pump 10, energy storage 9, valve pocket gets into and is stored in the oil feed groove 4; The epicoele groove 6 of valve pocket 1 is communicated with through oil return connectivity slot 5 and all is communicated with oil storage cylinder 12 with cavity of resorption groove 7, turns to the piston two ends balance in the clutch release slave cylinder 8, and the high-voltage oil liquid of injection is communicated with turning to clutch release slave cylinder 8 nothings; The convertible valve inner fluid does not have mobile, and system keeps the normal pressure attitude.
When right steering takes place,, turn to input shaft 13 to clockwise rotate certain angle referring to Fig. 4; Oil feed groove 4 is communicated with fuel feed hole 3 with cavity of resorption groove 7; The connectivity slot of oil return simultaneously 5 cuts off with cavity of resorption groove 7 after turning over certain angle, is communicated with epicoele groove 6, and promptly high-voltage oil liquid gets into the cavity of resorption 82 that turns to clutch release slave cylinder 8 from energy storage 9 through fuel feed hole 3, oil feed groove 4, cavity of resorption groove 7; Promote piston to left movement and will turn to the fluid of clutch release slave cylinder epicoele 81 to extrude, through epicoele groove 6,5 oil returns of oil return connectivity slot to oil storage cylinder 12.It is that vehicle provides the right steering power-assisted that piston motion drives transmission device.
When left steering takes place, opposite with Fig. 4, turn to input shaft 13 to rotate counterclockwise certain angle; Oil feed groove 4 is communicated with fuel feed hole 3 with epicoele groove 6; The connectivity slot of oil return simultaneously 5 cuts off with epicoele groove 6 after turning over certain angle, is communicated with cavity of resorption groove 7, and high-voltage oil liquid gets into and turns to clutch release slave cylinder cavity of resorption 81 through fuel feed hole 3, oil feed groove 4, epicoele groove 6; Promote piston and move right and will turn to the fluid of clutch release slave cylinder epicoele 82 to extrude, through cavity of resorption groove 7,5 oil returns of oil return connectivity slot to oil storage cylinder 12.
Claims (7)
1. a gerotor type fluid-link steering valve comprises
Valve pocket, have on the valve pocket fuel feed hole, with epicoele groove that turns to the clutch release slave cylinder upper and lower cavity to be communicated with respectively and cavity of resorption groove;
And spool, it is characterized in that: have oil feed groove, oil return connectivity slot on the said spool sidewall, oil feed groove is corresponding with said valve pocket fuel feed hole position and width, is communicated with oil circuit as oil-feed; The oil return connectivity slot is corresponding with following cavity groove position and width with the epicoele groove of said valve pocket, is communicated with oil circuit as oil return.
2. a kind of gerotor type fluid-link steering valve according to claim 1, it is characterized in that: said oil return connectivity slot is the parallel slot that is parallel to the spool bus.
3. a kind of gerotor type fluid-link steering valve according to claim 1, it is characterized in that: the oil feed groove on the said spool sidewall is the osed top groove.
4. a kind of gerotor type fluid-link steering valve according to claim 1; It is characterized in that: said oil feed groove width is corresponding with chamber well width on the valve pocket; Satisfy under the convertible valve normality not have and be communicated with, when convertible valve is worked, be communicated with epicoele groove or cavity of resorption groove with epicoele groove and cavity of resorption groove.
5. a kind of gerotor type fluid-link steering valve according to claim 1; It is characterized in that: said oil return connectivity slot width is corresponding with chamber well width on the valve pocket; Satisfy under the convertible valve normality and be communicated with, when convertible valve is worked, be communicated with epicoele groove or cavity of resorption groove with epicoele groove and cavity of resorption groove.
6. gerotor type hydrostatic steering system; Comprise and turn to input shaft, motor, oil pump, oil storage cylinder, energy storage, turn to clutch release slave cylinder; It is characterized in that: adopt the gerotor type fluid-link steering valve of one of claim 1～5, said gerotor type fluid-link steering valve is communicated with said oil storage cylinder through the oil return connectivity slot end of spool.
7. a kind of gerotor type hydrostatic steering system according to claim 6 is characterized in that comprising following mode of operation:
When nothing turns to; The fuel feed hole of the fluid of oil storage cylinder on oil pump, energy storage, valve pocket gets into and is stored in the oil feed groove; Valve pocket epicoele groove is communicated with and all is communicated with oil storage cylinder through the oil return connectivity slot with the cavity of resorption groove, turns to the piston two ends balance in the clutch release slave cylinder, and the convertible valve inner fluid does not have mobile.
When right steering takes place; Turn to input shaft to clockwise rotate certain angle; Oil feed groove is communicated with fuel feed hole with the cavity of resorption groove, the connectivity slot of oil return simultaneously cuts off with the cavity of resorption groove after turning over certain angle, is communicated with the epicoele groove; High-voltage oil liquid gets into through fuel feed hole, oil feed groove, cavity of resorption groove and turns to the clutch release slave cylinder cavity of resorption, the fluid that promotes piston motion and will turn to the clutch release slave cylinder epicoele through epicoele groove, the oil return of oil return connectivity slot to oil storage cylinder.
When left steering takes place; Turn to input shaft to rotate counterclockwise certain angle; Oil feed groove is communicated with fuel feed hole with the epicoele groove, the connectivity slot of oil return simultaneously cuts off with the epicoele groove after turning over certain angle, is communicated with the cavity of resorption groove; High-voltage oil liquid gets into through fuel feed hole, oil feed groove, epicoele groove and turns to the clutch release slave cylinder epicoele, the fluid that promotes piston motion and will turn to the clutch release slave cylinder cavity of resorption through cavity of resorption groove, the oil return of oil return connectivity slot to oil storage cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101876669A CN102336216A (en) | 2011-07-06 | 2011-07-06 | Normal-pressure hydraulic steering valve and steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101876669A CN102336216A (en) | 2011-07-06 | 2011-07-06 | Normal-pressure hydraulic steering valve and steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102336216A true CN102336216A (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101876669A Pending CN102336216A (en) | 2011-07-06 | 2011-07-06 | Normal-pressure hydraulic steering valve and steering system |
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| Country | Link |
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| CN (1) | CN102336216A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104206062A (en) * | 2013-05-30 | 2014-12-17 | 凯斯纽荷兰(上海)机械研发有限公司 | Windrower steering system |
| CN112692680A (en) * | 2021-01-04 | 2021-04-23 | 东风汽车股份有限公司 | Steering engine valve running-in device and running-in method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469342A (en) * | 1981-12-31 | 1984-09-04 | Adwest Engineering Limited | Rotary valve for a power assisted steering mechanism |
| DE4330159C1 (en) * | 1993-09-07 | 1994-11-10 | Trw Fahrwerksyst Gmbh & Co | Steering valve with a sealed centre |
| JPH07285453A (en) * | 1994-04-21 | 1995-10-31 | Toyoda Mach Works Ltd | Center closed rotary valve |
| CN1189134A (en) * | 1995-05-05 | 1998-07-29 | 毕晓普驾驶有限公司 | Rotary valve for power steering gear |
| US6082403A (en) * | 1998-04-09 | 2000-07-04 | Trw Inc. | Power steering control valve with back pressure |
-
2011
- 2011-07-06 CN CN2011101876669A patent/CN102336216A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469342A (en) * | 1981-12-31 | 1984-09-04 | Adwest Engineering Limited | Rotary valve for a power assisted steering mechanism |
| DE4330159C1 (en) * | 1993-09-07 | 1994-11-10 | Trw Fahrwerksyst Gmbh & Co | Steering valve with a sealed centre |
| JPH07285453A (en) * | 1994-04-21 | 1995-10-31 | Toyoda Mach Works Ltd | Center closed rotary valve |
| CN1189134A (en) * | 1995-05-05 | 1998-07-29 | 毕晓普驾驶有限公司 | Rotary valve for power steering gear |
| US6082403A (en) * | 1998-04-09 | 2000-07-04 | Trw Inc. | Power steering control valve with back pressure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104206062A (en) * | 2013-05-30 | 2014-12-17 | 凯斯纽荷兰(上海)机械研发有限公司 | Windrower steering system |
| CN112692680A (en) * | 2021-01-04 | 2021-04-23 | 东风汽车股份有限公司 | Steering engine valve running-in device and running-in method |
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Application publication date: 20120201 |