CN102691686A - Flow control switching valve for automobile emergency steering system - Google Patents
Flow control switching valve for automobile emergency steering system Download PDFInfo
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- CN102691686A CN102691686A CN2012101764672A CN201210176467A CN102691686A CN 102691686 A CN102691686 A CN 102691686A CN 2012101764672 A CN2012101764672 A CN 2012101764672A CN 201210176467 A CN201210176467 A CN 201210176467A CN 102691686 A CN102691686 A CN 102691686A
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Abstract
A flow control switching valve for an automobile emergency steering system adopts the structure that a transversal main valve core is arranged in the middle of the valve body; a first groove and a second groove are sequentially formed in the outer side surface of the main valve core in a direction perpendicular to the length direction; a small hole leading to the interior of the main valve core is formed in the first groove; one end of the main valve core, which is near the second groove, is connected with a small check valve through a first spring; the other end of the main valve core serves as the oil inlet of a main steering pump; a large check valve is arranged on the lower side of the main valve cover; the bottom end of the large check valve is an oil outlet; a channel is arranged between the small check valve and the large check valve; a first annular groove, a second annular groove and a third annular groove, which are coaxial with the main valve core, are formed in the valve body; the first annular groove corresponds to the top end of the large check valve; the second annular groove is connected with the oil inlet of an emergency pump; and the third annular groove is connected with the oil return port of the emergency pump. The flow control switching valve can be used for automatically switching the oil supply flow rates of two steering oil pumps which supply oil to a steering machine, and when the flow rate of one oil pump in the system is smaller than the set flow rate of the system, the flow control switching valve gives out an alarm automatically for prompt.
Description
Technical field
The invention belongs to hydraulic steering system, relate to the car emergency steering system, be specifically related to a kind of flow control switching valve that is used for the car emergency steering system.
Background technique
Along with developing of automobile industry, the increase of carload quality, existing hydraulic steering system can satisfy GB17675 standard and the standard EN 71/311/EEC of European Union under normal operation; But under system durability decline or failure conditions, motor turning was lost efficacy, and did not meet above-mentioned standard-required; And security incident very easily takes place, and in the case, emergent steering system is used and is given birth to; In this system, need a kind of emergency valve, can make emergent steering pump and main steering pump switch operating; Realize the automatic switchover of two steerig pumps to the steering box fuel supply flow rate, right present valve body all can not satisfy the demands.
Summary of the invention
In order to overcome the deficiency of above-mentioned existing technology, the object of the present invention is to provide a kind of flow control switching valve that is used for the car emergency steering system, constitute new hydraulic steering system, realize the hydraulic steering system safety protection, thereby prolong lifetime of system.
To achieve these goals, the technological scheme of the present invention's employing is:
A kind of flow control switching valve that is used for the car emergency steering system; Comprise valve body 2; The middle part of valve body 2 is provided with horizontal main valve plug 6, has the aperture 603 that conducting to main valve plug 6 inside are arranged on first groove 601 at interval and second groove, 602, the first grooves 601 successively perpendicular to its length direction on main valve plug 6 outer side surfaces; Main valve plug 6 connects little one-way valve 25 near an end of second groove 602 through first spring 5; The other end is main steering pump filler opening, and the downside of main valve plug 6 is provided with big one-way valve 26, and the bottom of big one-way valve 26 is an oil outlet; Between little one-way valve 25 and the big one-way valve 26 path is arranged; Have the tops with coaxial first circular groove 201, second circular groove 202 and the 3rd circular groove 203, the first circular grooves 201 corresponding big one-way valves 26 of main valve plug 6 in the valve body 2, second circular groove 202 connects the emergencypump filler opening; The 3rd circular groove 203 takes back hydraulic fluid port; The size of said first groove 601, second groove 602, first circular groove 201, second circular groove 202 and the 3rd circular groove 203 satisfies: when first spring 5 is compressed, second circular groove 202, second groove 602 and the 3rd circular groove 203 form the conducting chambeies, first circular groove 201 and first groove, 601 formation conducting chambeies; When first spring 5 is a normal state, second circular groove 202 and first circular groove 201 form the conducting chambeies.
Said main valve plug 6 set inside minor diameter oil throughs 604, the diameter of minor diameter oil through 604 is by the elasticity decision of the switching flow of setting and first spring 5.
Said big one-way valve 26 comprises inverted cone spool 17, is socketed with second spring 21 that cooperates with its valve seat 20 on the conical surface lower outer diameter of inverted cone spool 17, little one-way valve 25 and big one-way valve 26 structure basically identicals.
Said return opening position is provided with the 3rd plug 11, the three plugs 11 inboards the side that the 3rd spring 10, the three springs 10 connect steel ball 8 is set, and the opposite side that on fuel-displaced path, is positioned at steel ball 8 is provided with pressure transducer 23, thereby forms the warning subtense angle.
Said the 3rd spring 10 is installed in the aperture in the 3rd plug 11, and the 3rd plug 11 is installed on the valve body 2, and the 3rd spring 10 connects steel ball seat 9, and steel ball 8 is contained on the steel ball seat 9.
The present invention compared with prior art has following advantage:
1) can realize automatically in the new system that two steerig pumps are to the automatic switchover of steering box fuel supply flow rate.
2) when the flow of some oil pumps in the system during, can under the situation of energized, report to the police automatically, remind driver's system works undesired less than the default flow.
In a word, emergent steering system can both guarantee that traveling vehicle possesses steering capability when any fault appears in motor and main steering system; At utmost improve the Safety performance of vehicle, through checking, vehicle of the same race; Assemble different steering system, lifetime of system has improved more than the twice.And flow control switching valve of the present invention can be supported this kind steering capability.
Description of drawings
Fig. 1 is the structural representation of main valve plug 6 of the present invention.
Fig. 2 is the structural representation of valve body 2 of the present invention.
Fig. 3 is the structural representation of inverted cone spool 17 of the present invention.
Fig. 4 is the mounting point schematic representation of pressure transducer 23 of the present invention.
Fig. 5 is a structural representation of the present invention.
Hydraulic schematic diagram of the present invention when Fig. 6 is main steering pump proper functioning.
Hydraulic schematic diagram of the present invention when Fig. 7 is main steering pump malfunction.
Fig. 8 is used for the schematic representation of car emergency steering system for the present invention.
The implication of reference character among the figure:
1-the first plug; 2-valve body; 3-the first seal ring; 4-the four plug; 5-the first spring; 6-main valve plug; 7-the five plug; 8-steel ball; 9-steel ball seat; 10-the three spring; 11-the three plug; 12-the three pad; 13-the first collar; 14-the second plug; 15-the second seal ring; 16-the first pad; 17-inverted cone spool; 18-back-up ring; 19-the second collar; 20-valve seat; 21-second spring; 22 second pads; The 23-pressure transducer; The 24-separation sleeve; The little one-way valve of 25-; The big one-way valve of 26-; The 27-steering actuation cylinder; 28 main steering pumps; 29 main oil tanks; 30-secondary oil tank; 31-emergencypump; 32-emergency valve of the present invention; 33-steering box; 201-the first circular groove; 202-the second circular groove; 203-the three circular groove; 601-the first groove; 602-the second groove; The 603-aperture; 604-minor diameter oil through.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
The structure of each constituent element of the present invention is described at first respectively.
As shown in Figure 1; Have at interval first groove 601 and second groove, 602, the first grooves 601 successively more near main steering pump filler opening perpendicular to its length direction on main valve plug 6 outer side surfaces of the present invention, three apertures 603 of conducting to main valve plug 6 inside are arranged on first groove 601; Main valve plug 6 set inside minor diameter oil throughs 604; Main valve plug 6 inside are rendered as two chambeies that are communicated with by minor diameter oil through 604, in the present embodiment, directly are communicated with the right chamber that is of main steering pump filler opening; Another is left chamber, and the diameter of minor diameter oil through 604 is by the elasticity decision of the switching flow of setting and first spring 5.
As shown in Figure 2; Have first circular groove 201, second circular groove 202 and the 3rd circular groove 203 that are parallel to each other in the valve body 2 of the present invention; The top of first circular groove, 201 corresponding big one-way valves 26, second circular groove 202 connects the emergencypump filler opening, and the 3rd circular groove 203 takes back hydraulic fluid port.
Like Fig. 3, shown in Figure 5, big one-way valve 26 of the present invention comprises inverted cone spool 17, and first pad 16 and second pad 22 are set on the conical surface lower plane of inverted cone spool 17; Socket second spring 21 on conical surface lower outer diameter then; On the valve seat 20 round bar is arranged, round bar stretches in the endoporus of inverted cone spool 17 conical surface bottoms, and second spring 21 cooperates with valve seat 20; Make that taper valve core 17 can be along its axially reciprocating; Realize opening and closing, the bottom of valve seat 20 sets gradually the back-up ring 18 and second collar 19, carries out spacing to big one-way valve 26.Little one-way valve 25 and big one-way valve 26 structure basically identicals.
As shown in Figure 4, being provided with between the 3rd plug 11, the three plugs 11 and the valve body 2 in return opening of the present invention position has the 3rd pad 12; The 3rd plug 11 has endoporus, and the 3rd spring 10 wherein is installed, and steel ball 8 is installed on the steel ball seat 9; Steel ball seat 9 bottom design have boss; Boss stretches to realizes in the hole of the 3rd spring 10 and the close-fitting of the 3rd spring 10 that the opposite side that on fuel-displaced path, is positioned at steel ball 8 is provided with pressure transducer 23, should have separation sleeve 24 to carry out certain protection on the pressure transducer 23.Under the switching flow situation of setting; If main steering pump is the steering box fuel feeding; Then steel ball 8 does not contact with pressure transducer 23 basically; If emergencypump is the steering box fuel feeding, then steel ball 8 applies certain pressure to pressure transducer 23 and makes its work under the spring-back force effect of the 3rd spring 10, and above structure forms the warning subtense angle.
As shown in Figure 5; A kind of concrete structure that is used for the flow control switching valve of car emergency steering system for the present invention; At the middle part of valve body 2 horizontal main valve plug 6 is set; Main valve plug 6 connects little one-way valve 25 near an end of second groove 602 through first spring 5, and end is with first collar, 13 spacing main steering pump filler opening, composition switching-over and the RACSs of connecing in addition.The downside of main valve plug 6 is provided with big one-way valve 26, and the bottom of big one-way valve 26 is an oil outlet, between little one-way valve 25 and the big one-way valve 26 path is arranged; Need block the used auxiliary hole of processing with first plug 1; Cooperate second seal ring 15 with second plug 14, block safe valve opening, same; On way to cycle oil, block the used auxiliary hole of processing with the 5th plug 7.And at valve seat one end of little one-way valve 25, directly connect the 4th plug 4, the four plugs 4 also to play the effect of supporting valve seat simultaneously, the 4th plug 4 cooperates first seal ring 3, blocks the safe valve opening here.
The size of first groove 601 according to the invention, second groove 602, first circular groove 201, second circular groove 202 and the 3rd circular groove 203 satisfies: when first spring 5 is compressed; Second circular groove 202, second groove 602 and the 3rd circular groove 203 form the conducting chambeies, first circular groove 201 and first groove, 601 formation conducting chambeies; When first spring 5 is a normal state, second circular groove 202 and first circular groove 201 form the conducting chambeies.
Switching function of the present invention is to move through the switching-over of main valve plug 6 to realize, according to concrete applying working condition, mainly contains following working state:
(1) main steering pump proper functioning, main valve plug 6 is operated in first spring 5 and is compressed the position, emergencypump oil oil sump tank;
When main steering pump was in proper working order, the right chamber of hydraulic oil through main valve plug 6 got into left chamber by the minor diameter oil through 604 of centre, pushes little one-way valve 25 open and leads to oil outlet, gets into steering box, made steering system work.Its principle is: because the minor diameter oil through 604 in the middle of the main valve plug 6 forms pressure difference according to the orifice restriction principle in minor diameter oil through 604 both sides.Main steering pump flow is greater than the switching flow of setting; Main valve plug 6 right chamber hydraulic couplings are greater than left chamber one end, first spring, 5 thrusts; Main valve plug 6 is pulled to position, a left side; First spring 5 is compressed, and a large amount of main steering pump oil-feeds enter into the conducting chamber that first circular groove 201 and first groove 601 form through aperture 604, and then flows to oil outlet through big one-way valve 26.The emergencypump oil-feed then enters into the conducting chamber that second circular groove 202, second groove 602 and the 3rd circular groove 203 form, and is directly returned by return opening.
This moment, main steering pump hydraulic oil was supplied with steering box, the direct oil sump tank of emergencypump hydraulic oil, and emergencypump hydraulic oil is pushed steel ball 8 open, and pressure transducer 23 is gathered less than pressure signal, and the fault indicating lamp of connection is extinguished.Be the hydraulic schematic diagram of the present invention in Fig. 6 frame of broken lines in this working position.
(2) the main air pump inoperative (losing efficacy or engine misses) that turns to, main valve plug 6 is operated in position, right chamber, emergencypump work.
When main steering pump damage fully or flow less than the switching flow of setting; Then main valve plug 6 right chamber hydraulic couplings are less than left chamber one end, first spring, 5 thrusts; Main valve plug 6 is pulled to right position; First spring 5 recovers, and the main steering pump oil-feed of trace is closed and can not outflows outside aperture 604 enters into first groove 601.The emergencypump oil-feed then enters into the conducting chamber of second circular groove 202 and 201 formation of first circular groove, and then flows to oil outlet through big one-way valve 26.
This moment, return line did not have fluid, and steel ball 8 withstands on pressure transducer 23 guide rods under the elastic force power effect of the 3rd spring 10, and alarm circuit is connected, and fault indicating lamp is reported to the police, and points out main steering pump to break down.Be the hydraulic schematic diagram of the present invention in Fig. 7 frame of broken lines in this working position.
Fig. 8 is applied to the schematic diagram of emergent steering system for the present invention, and the present invention and main steering pump, emergencypump are used.This overall system comprises two oil tanks; The fuel feeding of main oil tank 29 leads to the main pump filler opening of emergency valve 32 of the present invention through main steering pump 28; Oil outlet through emergency valve 32 of the present invention feeds steering box 33 and steering actuation cylinder 27 again, and part is returned main oil tank 29 formation loops.The fuel feeding of secondary oil tank 30 is through the filler opening of emergencypump 31, the emergencypump filler opening that oil outlet feeds emergency valve 32 of the present invention again, returns from the return opening of emergency valve 32 of the present invention and forms the loop.
When system's proper functioning; Main steering pump 28 output fluid advance the main pump filler opening of emergency valve 32 of the present invention; Go out from the oil outlet of emergency valve 32, feed steering box 33 and steering actuation cylinder 27 back-up system work, emergencypump 31 output fluid advance the emergencypump filler opening of emergency valve 32 of the present invention; Go out from the return opening of emergency valve 32, return secondary oil tank 30.
When system emergency was worked, this moment, main steering pump 28 was the situation of breaking down, and the fluid of main steering pump 28 outputs is less; The less fluid of this part advances the main pump filler opening of emergency valve 32; Go out from the oil outlet of emergency valve 32, emergencypump 31 output fluid advance the emergencypump filler opening of emergency valve 32, go out from the oil outlet of emergency valve 32; Two steering pump fluid feed steering box 33 and steering actuation cylinder 27 back-up system work simultaneously, guarantee system's proper functioning.
Thus, realized the automatic switchover of main steering pump and emergencypump, guaranteed that emergent steering system guarantees that under the situation that motor breaks down traveling vehicle possesses steering capability, at utmost improves the Safety performance of vehicle to the steering box fuel feeding.
Claims (7)
1. flow control switching valve that is used for the car emergency steering system; Comprise valve body (2); The middle part of valve body (2) is provided with horizontal main valve plug (6); It is characterized in that, have first groove (601) and second groove (602) at interval successively perpendicular to its length direction on main valve plug (6) outer side surface, the inner aperture (603) of conducting to main valve plug (6) is arranged on first groove (601); Main valve plug (6) connects little one-way valve (25) near an end of second groove (602) through first spring (5); The other end is main steering pump filler opening, and the downside of main valve plug (6) is provided with big one-way valve (26), and the bottom of big one-way valve (26) is an oil outlet; Between little one-way valve (25) and the big one-way valve (26) path is arranged; Have first circular groove (201) coaxial, second circular groove (202) and the 3rd circular groove (203) in the valve body (2) with main valve plug (6), the top of the corresponding big one-way valve (26) of first circular groove (201), second circular groove (202) connects the emergencypump filler opening; The 3rd circular groove (203) takes back hydraulic fluid port; The size of said first groove (601), second groove (602), first circular groove (201), second circular groove (202) and the 3rd circular groove (203) satisfies: when first spring (5) is compressed, second circular groove (202), second groove (602) and the 3rd circular groove (203) form the conducting chamber, and first circular groove (201) forms the conducting chamber with first groove (601); When first spring (5) is a normal state, second circular groove (202) forms the conducting chamber with first circular groove (201).
2. flow control switching valve according to claim 1; It is characterized in that; Said main valve plug (6) set inside minor diameter oil through (604), the diameter of minor diameter oil through (604) is by the elasticity decision of switching flow of setting and first spring (5).
3. flow control switching valve according to claim 1 is characterized in that, said aperture (603) has three, evenly is arranged on the same cross section.
4. flow control switching valve according to claim 1; It is characterized in that; Said big one-way valve (26) comprises inverted cone spool (17), is socketed with second spring (21) that cooperates with its valve seat (20) on the conical surface lower outer diameter of inverted cone spool (17).
5. flow control switching valve according to claim 1; It is characterized in that; Said return opening position is provided with the 3rd plug (11); The 3rd plug (11) inboard is provided with the 3rd spring (10), and the 3rd spring (10) connects a side of steel ball (8), and the opposite side that on fuel-displaced path, is positioned at steel ball (8) is provided with pressure transducer (23).
6. flow control switching valve according to claim 1; It is characterized in that; Said the 3rd spring (10) is installed in the aperture in the 3rd plug (11); The 3rd plug (11) is installed on the valve body (2), and the 3rd spring (10) connects steel ball seat (9), and steel ball (8) is contained on the steel ball seat (9).
7. flow control switching valve according to claim 1 is characterized in that, main valve plug (6) is spacing with first collar (13) at an end of main steering pump filler opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210176467.2A CN102691686B (en) | 2012-05-31 | 2012-05-31 | Flow control switching valve for automobile emergency steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210176467.2A CN102691686B (en) | 2012-05-31 | 2012-05-31 | Flow control switching valve for automobile emergency steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102691686A true CN102691686A (en) | 2012-09-26 |
| CN102691686B CN102691686B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210176467.2A Active CN102691686B (en) | 2012-05-31 | 2012-05-31 | Flow control switching valve for automobile emergency steering system |
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| Country | Link |
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| CN (1) | CN102691686B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087365A (en) * | 2017-12-19 | 2018-05-29 | 宁波文泽机电技术开发有限公司 | Oil circuit automatic transfer valve |
| CN110159606A (en) * | 2019-06-25 | 2019-08-23 | 山推工程机械股份有限公司 | A kind of hydraulic system and paver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213108A (en) * | 1993-01-14 | 1994-08-02 | Daihatsu Motor Co Ltd | Intake air flow rate control valve for warming up driving |
| CN2925805Y (en) * | 2006-07-12 | 2007-07-25 | 邢桂云 | Switch valve of riving machine |
| CN101956841A (en) * | 2010-08-19 | 2011-01-26 | 陕西航空电气有限责任公司 | Two-position four-way air valve using air cylinder structure |
| CN202673809U (en) * | 2012-05-31 | 2013-01-16 | 陕西秦川机械发展股份有限公司 | Novel flow control changeover valve |
-
2012
- 2012-05-31 CN CN201210176467.2A patent/CN102691686B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213108A (en) * | 1993-01-14 | 1994-08-02 | Daihatsu Motor Co Ltd | Intake air flow rate control valve for warming up driving |
| CN2925805Y (en) * | 2006-07-12 | 2007-07-25 | 邢桂云 | Switch valve of riving machine |
| CN101956841A (en) * | 2010-08-19 | 2011-01-26 | 陕西航空电气有限责任公司 | Two-position four-way air valve using air cylinder structure |
| CN202673809U (en) * | 2012-05-31 | 2013-01-16 | 陕西秦川机械发展股份有限公司 | Novel flow control changeover valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087365A (en) * | 2017-12-19 | 2018-05-29 | 宁波文泽机电技术开发有限公司 | Oil circuit automatic transfer valve |
| CN110159606A (en) * | 2019-06-25 | 2019-08-23 | 山推工程机械股份有限公司 | A kind of hydraulic system and paver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102691686B (en) | 2014-09-03 |
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Owner name: QINCHUAN MACHINE TOOL GROUP CO., LTD. Free format text: FORMER NAME: QINCHUAN MACHINERY DEVELOPMENT CO LTD, SHAANXI PROV |
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| CP01 | Change in the name or title of a patent holder |
Address after: 721009, 22 Tan Tan Road, Shaanxi, Baoji Patentee after: Qin Chuan Machine Tool & Tool Group Co., Ltd. joint-stock company Address before: 721009, 22 Tan Tan Road, Shaanxi, Baoji Patentee before: Qinchuan Machinery Development Co., Ltd., Shaanxi Prov |