CN102700603A - Emergency two-circuit power steering system - Google Patents
Emergency two-circuit power steering system Download PDFInfo
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- CN102700603A CN102700603A CN2012101763754A CN201210176375A CN102700603A CN 102700603 A CN102700603 A CN 102700603A CN 2012101763754 A CN2012101763754 A CN 2012101763754A CN 201210176375 A CN201210176375 A CN 201210176375A CN 102700603 A CN102700603 A CN 102700603A
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Abstract
The invention relates to an emergency two-circuit power steering system, which comprises a main oil tank and an auxiliary oil tank, wherein the main oil tank is communicated with a steering engine and a steering assistance cylinder through a main steering pump to constitute a main steering system, the auxiliary oil tank is communicated with the steering engine and the steering assistance cylinder through an emergency pump and an emergency valve to constitute a steering emergency system, and the steering emergency system can ensure oil supply to the steering engine when the main steering system is failed and can not work normally so as to maintain the normal work of the steering engine. When an engine and the main steering system are failed, a running vehicle is enabled to have a steering capacity, the steering performance of a heavy vehicle, particularly the steering performance under an overload state, is improved, and at the same time the service life of the steering oil pump is prolonged. Through verification, when vehicles of the same type are provided with different steering systems, the service life is prolonged by more than 2 times.
Description
Technical field
The invention belongs to hydrostatic steering system, relate to the car emergency steering swivel system, be specifically related to a kind of emergency double loop steering boost system.
Background technology
Along with developing of automobile industry; The increase of carload quality; Existing hydrostatic 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 lost efficacy; Do not meet above-mentioned standard-required, and safety misadventure very easily takes place.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art, the object of the present invention is to provide a kind of emergency double loop steering boost system, realize the hydrostatic steering system safety guard-safeguard, thereby prolong system life.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of emergency double loop steering boost system; Comprise main oil tank 29; Main oil tank 29 is communicated with steering box 33 through main steering pump 28 and steering actuation cylinder 27 formations turn to main system; Also comprise secondary oil tank 30, secondary oil tank 30 is communicated with steering box 33 through jury pump 31 and guard valve 32 and steering actuation cylinder 27 formations turn to calibration package.
Main pump oil inlet P, jury pump oil inlet P 2, oil return inlet T and oil outlet A are arranged on the said guard valve 32; The main pump oil inlet P connects the outlet of main steering pump 28; Jury pump oil inlet P 2 connects the outlet of jury pump 31, oil return inlet T tieback to secondary oil tank 30, and oil outlet A connects steering box 33.
Said jury pump 31 comprises with the pump housing 45, middle pump body 46 and the back pump housing 47 before eccentric speed reduction gearing bonded assembly successively; The oil inlet 49 that is communicated to eccentric speed reduction gearing is set on the back pump housing 47; A plurality of radial holes 48 are arranged on the said middle pump body 46; A plunger 34 is set respectively in each radial hole 48 forms the pump oil subsystem, plunger 34 bottoms cooperate with the eccentric excircle of eccentric speed reduction gearing, and piston spring 35 is set in the endoporus of plunger 34; Plug 36 is arranged on radial hole 48 ends with in plunger 34 and the piston spring 35 inclosure holes; The outlet of said pump oil subsystem is arranged on the end face of middle pump body 46 and in end face upper outlet position oil seal piece 37 is set, and oil seal piece 37 cooperates with disk spring 38 in the circular groove 39 that is assemblied in the back pump housing 47 end faces, and circular groove 39 is communicated with oil outlet 40 on being arranged on the back pump housing 47.
Said eccentric speed reduction gearing comprises eccentric shaft 41, assembling lining 42 on the eccentric excircle of eccentric shaft 41, and lining 42 outer assembling outer shafts 43, said outer shaft 43 cooperates with middle pump body 46 and plunger 34.
On the cross section that the eccentric excircle of said oil inlet 49 and eccentric shaft 41 intersects thin-walled aperture 44 is set, forms logical oily check valve.
Said guard valve 25 comprises valve body 2, and 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 lateral surfaces; Conducting to main valve plug 6 in-to-in apertures 603 are arranged on first groove 601, and main valve plug 6 connects little check valve 25 near an end of second groove 602 through first spring 5, and the other end is main steering pump oil inlet; The downside of main valve plug 6 is provided with big check valve 26; The bottom of big check valve 26 is an oil outlet, little check valve 25 with between the check valve 26 path is arranged greatly, have first circular groove 201, second circular groove 202 and three circular groove 203 coaxial in the valve body 2 with main valve plug 6; The top of first circular groove, 201 corresponding big check valves 26; Second circular groove 202 connects the jury pump oil inlet, and the 3rd circular groove 203 takes back hydraulic fluid port, and 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 condition, 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 aperture 603 has three, evenly is arranged on the same cross section.
Said big check valve 26 comprises back taper spool 17, is socketed with second spring 21 that cooperates with its valve seat 20 on the conical surface lower outer diameter of back taper spool 17.
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 sensor 23.
The emergent steering swivel system of the present invention can both guarantee that traveling vehicle possesses steering capability when any fault appears in driving engine and main steering swivel system, improve the turning efficiency of heavy-duty vehicle; The turning efficiency under the overload condition particularly; Improve the service life of power steerig pump simultaneously, through checking, vehicle of the same race; Assemble different steering swivel systems, system life has improved more than 2 times.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the used a kind of jury pump structural representation of the present invention.
Fig. 3 is a pump body structure scheme drawing behind Fig. 2.
Fig. 4 is Fig. 2 middle pump body structural representation.
Fig. 5 be among Fig. 2 A-A to the turnover oil circuit of B-B under view, eccentric shaft left-hand revolution.
Fig. 6 be among Fig. 2 A-A to the turnover oil circuit of B-B under view, eccentric shaft clickwise.
Fig. 7 is the used a kind of guard valve structural representation of the present invention.
Fig. 8 is Fig. 7 main valve plug structural representation.
Fig. 9 is Fig. 7 valve body structure scheme drawing.
Figure 10 is Fig. 7 back taper valve core structure scheme drawing.
Figure 11 is Fig. 7 pressure sensor installation site scheme drawing.
Hydraulic schematic diagram of the present invention when Figure 12 is main steering pump normal operation.
Hydraulic schematic diagram of the present invention when Figure 13 is main steering pump malfunction.
The implication of Reference numeral 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-back taper spool; 18-back-up ring; 19-the second collar; 20-valve seat; 21-the second spring; 22-the second pad; 23-pressure sensor; 24-distance sleeve; 25-little check valve; 26-big check valve; 27-steering actuation cylinder; 28-main steering pump; 29-main oil tank; 30-secondary oil tank; 31-jury pump; 32-guard valve of the present invention; 33-steering box; 34-plunger; 35-piston spring; 36-plug; 37-oil seal piece; 38-belleville spring; 39-circular groove; 40-oil outlet; 41-eccentric shaft; 42-lining; 43-outer shaft; 44-thin-walled aperture; 45-preceding the pump housing; 46-middle pump body; 47-back pump housing; 48-radial hole; 49-oil inlet; 201-the first circular groove; 202-the second circular groove; 203-the three circular groove; 601-the first groove; 602-the second groove; 603-aperture; 604-minor diameter oil through.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
As shown in Figure 1; A kind of emergency of the present invention double loop steering boost system; Comprise main oil tank 29; Main oil tank 29 is communicated with steering box 33 through main steering pump 28 and steering actuation cylinder 27 formations turn to main system; Also comprise secondary oil tank 30, secondary oil tank 30 is communicated with steering boxs 33 and steering actuation cylinder 27 through jury pump 31 and guard valve 32 and constitutes and turn to calibration package, is turning to the main system fuel feeding that ensures to steering box 33 can't normal operation time that breaks down to keep its normal operation thereby turn to calibration package to make.
Main pump oil inlet P, jury pump oil inlet P 2, oil return inlet T and oil outlet A are arranged on the above-mentioned guard valve 32; The main pump oil inlet P connects the outlet of main steering pump 28; Jury pump oil inlet P 2 connects the outlet of jury pump 31, oil return inlet T tieback to secondary oil tank 30, and oil outlet A connects steering box 33.
When system's normal operation:
Main steering pump 28 output fluid advance the main pump oil inlet P of guard valve 32; A goes out from oil outlet, feeds steering box 33 and steering actuation cylinder 27 supporting system work, and jury pump 31 output fluid advance the jury pump oil inlet P 2 of guard valve 32; Go out from oil return inlet T, return secondary oil tank 30.
When system emergency is worked:
When main steering pump 28 breaks down; Main steering pump 28 output fluid advance the main pump oil inlet P of guard valve 32, have (because fault, the amount of this part fluid is very little) from oil outlet A; Jury pump 31 output fluid advance the jury pump oil inlet P 2 of guard valve 32; A goes out from oil outlet, and two pump fluid feed steering box 33 and steering actuation cylinder 27 supporting system work simultaneously, guarantee system's normal operation.
As shown in Figure 2; A kind of concrete structure for the used jury pump 31 of the present invention; Comprise with the pump housing 45, middle pump body 46 and the back pump housing 47 before eccentric speed reduction gearing bonded assembly successively; All through stretching out in the mider hole that dome is encased in middle pump body 46, three pump housings are formed the basic supporting construction of pump with bolt and tight for the wherein preceding pump housing 45 and the back pump housing 47.
As shown in Figure 3; Be the used jury pump 31 back pump housing 47 structural representations of the present invention, the one of which end has oil inlet 49 and oil outlet 40, and the other end has circular groove 39; On the cross section that the eccentric excircle of oil inlet 49 and eccentric shaft 41 intersects thin-walled aperture 44 is set, forms logical oily check valve.
As shown in Figure 4; For used jury pump 31 middle pump bodies of the present invention 46 structural representations, eight radial holes 48 are arranged, eight pump oil subsystems of corresponding formation on it; Four wherein adjacent radial holes 48 are on a vertical plane; Four radial holes 48 are provided with a plunger 34 respectively and form pump oil subsystem, eight pump oil subsystems of corresponding formation on another vertical plane in each radial hole 48 in addition.
Eccentric speed reduction gearing comprises eccentric shaft 41, assembling lining 42 on the eccentric excircle of eccentric shaft 41, and lining 42 outer assembling outer shafts 43, the three forms eccentric speed reduction gearing.In the preceding pump housing 45 oil sealing is set, the oil sealed endoporus cooperates with eccentric shaft 41, and cylindrical cooperates with the preceding pump housing 45, and eccentric shaft 41 axle head step places assembling front pad supports front bearing, and front bearing is socketed in the axle head of eccentric shaft 41, the pump housing 41 before being positioned at; Eccentric shaft 41 contacts an end with the back pump housing 47 step shaft shoulder face place is provided with the back pad, and back pad one end face and eccentric shaft 41 shoulder faces are fitted, and fits with the back pump housing 47 dome end faces in the other end; Simultaneously, on eccentric two side shafts of eccentric shaft 41 rear bearing is set respectively, rear bearing cooperates with the preceding pump housing 45 and the back pump housing 47 respectively, thereby realizes the cooperation that is connected of eccentric speed reduction gearing and the front and back pump housing.
The used jury pump 31 oil circuits turnover of the present invention route is: oil gets into the pump housing from oil inlet 49, gets into the pump oil subsystem by thin-walled aperture 44 again, then discharges through circular groove 39 and oil outlet 40 from the outlet of pump oil subsystem.
As shown in Figure 5; When eccentric shaft 41 left-hand revolutions; Plunger 34 is under the effect of eccentric shaft 41 eccentric excircles, and four plunger 34 sealed volume of eccentric shaft 41 eccentric excircle major diameters one side become big, and hydraulic oil is pressed into plunger 34 upper ends through oil seal piece 37 and disk spring 38 under bar pressure; Diminish in four plunger 34 sealed volume of eccentric excircle minor diameter one side, fluid is forced out through oil seal piece 37 and disk spring 38.
As shown in Figure 6; When eccentric shaft 41 clickwises; Plunger 34 is under the effect of eccentric shaft 41 eccentric excircles; Four plungers 34 of eccentric shaft 41 eccentric excircle major diameters, one side (sealed volume diminishes during left-hand revolution four) sealed volume becomes big; Hydraulic oil is pressed into plunger 34 upper ends through oil seal piece 37 and disk spring 38 under bar pressure, diminish in four plungers 34 of opposite side (sealed volume becomes big four during left-hand revolution) sealed volume, and fluid is forced out through oil seal piece 37 and disk spring 38.
As shown in Figure 7; A kind of concrete structure for the used guard valve 32 of the present invention; At the middle part of valve body 2 horizontal main valve plug 6 is set; Main valve plug 6 connects little check valve 25 near an end of second groove 602 through first spring 5, and end is with first collar, 13 spacing main steering pump oil inlet, composition switching-over and the RACSs of connecing in addition.The downside of main valve plug 6 is provided with big check valve 26, and the bottom of big check valve 26 is an oil outlet, between little check valve 25 and the big check 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 check valve 25, direct connection the 4th plug 4, the four plugs 4 also play the effect of supporting valve seat simultaneously, and the 4th plug 4 cooperates first seal ring 3, blocks the safe valve opening here.
As shown in Figure 8, be main valve plug 6 structural representations of the used guard valve 32 of the present invention, have first groove 601 and second groove 602 at interval successively perpendicular to its length direction on main valve plug 6 lateral surfaces; First groove 601 is more near main steering pump oil inlet P; Three apertures 603 of conducting to main valve plug 6 in-to-ins 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; What directly be communicated with main steering pump oil inlet P is right chamber, and 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 9; Valve body 2 structural representations for the used guard valve 32 of the present invention; 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; The top of first circular groove, 201 corresponding big check valves 26, second circular groove 202 connects jury pump oil inlet P 2, the three circular grooves 203 and takes back hydraulic fluid port T.
Shown in figure 10, the big check valve 26 of the used guard valve 32 of the present invention comprises back taper spool 17, and first pad 16 and second pad 22 are set on the conical surface lower plane of back taper 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 back taper 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 check valve 26.Little check valve 25 and big check valve 26 structure basically identicals.
Shown in figure 11; Being provided with in the oil return inlet T position of guard valve 32 of the present invention has the 3rd pad 12, the three plugs 11 that endoporus is arranged between the 3rd plug 11, the three plugs 11 and the valve body 2; The 3rd spring 10 wherein is installed; Steel ball 8 is installed on the steel ball seat 9, and steel ball seat 9 bottom design have boss, and boss stretches to the close-fitting of realizing in the hole of the 3rd spring 10 with the 3rd spring 10; The opposite side that on fuel-displaced path, is positioned at steel ball 8 is provided with pressure sensor 23, should have distance sleeve 24 to carry out certain protection on the pressure sensor 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 sensor 23 basically; If jury pump is the steering box fuel feeding, then steel ball 8 applies certain pressure to pressure sensor 23 and makes its work under the screen resilience effect of the 3rd spring 10, and above structure forms the warning subsystem.
The size of above-mentioned 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 condition, second circular groove 202 and first circular groove 201 form the conducting chambeies.
Handoff functionality 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 mode of operation:
(1) main steering pump 28 normal operation, main valve plug 6 is operated in first spring 5 and is compressed the position, jury pump 31 oily oil sump tanks;
When main steering pump 28 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 check valve 25 open and leads to oil outlet A, gets into steering box, made steering swivel system work.Its principle is: because the minor diameter oil through 604 in the middle of the main valve plug 6 forms difference of pressure according to the orifice restriction principle in minor diameter oil through 604 both sides.Main steering pump 28 flows are 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 check valve 26.The jury pump 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 jury pump hydraulic oil, and jury pump hydraulic oil is pushed steel ball 8 open, and pressure sensor 23 is gathered less than pressure signal, and the bonded assembly fault-indicating lamp extinguishes.Be the hydraulic schematic diagram of the present invention in Figure 12 frame of broken lines at this control position.
(2) main steering pump 28 is not worked (losing efficacy or engine off), and main valve plug 6 is operated in position, right chamber, jury pump 31 work.
When main steering pump 28 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 jury pump 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 A through big check valve 26.
This moment, oil return line did not have fluid, and steel ball 8 withstands on pressure sensor 23 guide rods under the elastic force power effect of the 3rd spring 10, and alarm loop is connected, and fault-indicating lamp is reported to the police, and points out main steering pump 28 to break down.Be the hydraulic schematic diagram of the present invention in Figure 13 frame of broken lines at this control position.
Thus, realized main steering pump 28 and the automatic switchover of jury pump 31, guaranteed that emergent steering swivel system guarantees that under the situation that driving engine breaks down traveling vehicle possesses steering capability, at utmost improves the safety performance of vehicle to steering box 33 fuel feeding.
Claims (10)
1. emergency double loop steering boost system; Comprise main oil tank (29); Main oil tank (29) is communicated with steering box (33) through main steering pump (28) and steering actuation cylinder (27) formation turns to main system; It is characterized in that, also comprise secondary oil tank (30), secondary oil tank (30) is communicated with steering box (33) through jury pump (31) and guard valve (32) and steering actuation cylinder (27) formation turns to calibration package.
2. emergency according to claim 1 double loop steering boost system; It is characterized in that; Main pump oil inlet (P), jury pump oil inlet (P2), return opening (T) and oil outlet (A) are arranged on the said guard valve (32), and main pump oil inlet (P) connects the outlet of main steering pump (28), and jury pump oil inlet (P2) connects the outlet of jury pump (31); Return opening (T) tieback to secondary oil tank (30), oil outlet (A) connects steering box (33).
3. emergency according to claim 1 double loop steering boost system; It is characterized in that; Said jury pump (31) comprises with the pump housing (45), middle pump body (46) and the back pump housing (47) before eccentric speed reduction gearing bonded assembly successively; The back pump housing (47) is gone up the oil inlet (49) that is communicated to eccentric speed reduction gearing is set; A plurality of radial holes (48) are arranged on the said middle pump body (46); A plunger (34) is set respectively in each radial hole (48) forms the pump oil subsystem, plunger (34) bottom cooperates with the eccentric excircle of eccentric speed reduction gearing, and piston spring (35) is set in the endoporus of plunger (34); Plug (36) is arranged on radial hole (48) end plunger (34) and piston spring (35) is enclosed in the hole; The outlet of said pump oil subsystem is arranged on the end face of middle pump body (46) and in end face upper outlet position oil seal piece (37) is set, and oil seal piece (37) cooperates with disk spring (38) in the circular groove (39) that is assemblied in the back pump housing (47) end face, and circular groove (39) is communicated with oil outlet (40) on being arranged on the back pump housing (47).
4. emergency according to claim 3 double loop steering boost system; It is characterized in that; Said eccentric speed reduction gearing comprises eccentric shaft (41); Assemble lining (42) on the eccentric excircle of eccentric shaft (41), the outer assembling of lining (42) outer shaft (43), said outer shaft (43) cooperates with middle pump body (46) and plunger (34).
5. emergency according to claim 3 double loop steering boost system is characterized in that, on the cross section that the eccentric excircle of said oil inlet (49) and eccentric shaft (41) intersects thin-walled aperture (44) is set, and forms logical oily check valve.
6. emergency according to claim 1 double loop steering boost system; It is characterized in that; Said guard valve (25) comprises valve body (2); The middle part of valve body (2) is provided with horizontal main valve plug (6), has first groove (601) and second groove (602) at interval successively perpendicular to its length direction on main valve plug (6) lateral surface, and conducting to main valve plug (6) in-to-in aperture (603) is arranged on first groove (601); Main valve plug (6) connects little check valve (25) near an end of second groove (602) through first spring (5); The other end is main steering pump oil inlet, and the downside of main valve plug (6) is provided with big check valve (26), and the bottom of big check valve (26) is an oil outlet; Between little check valve (25) and the big check 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 check valve (26) of first circular groove (201), second circular groove (202) connects the jury pump oil inlet; 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 condition, second circular groove (202) forms the conducting chamber with first circular groove (201).
7. emergency according to claim 6 double loop steering boost system; 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).
8. emergency according to claim 6 double loop steering boost system is characterized in that said aperture (603) has three, evenly is arranged on the same cross section.
9. emergency according to claim 6 double loop steering boost system; It is characterized in that; Said big check valve (26) comprises back taper spool (17), is socketed with second spring (21) that cooperates with its valve seat (20) on the conical surface lower outer diameter of back taper spool (17).
10. emergency according to claim 6 double loop steering boost system; 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 sensor (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210176375 CN102700603B (en) | 2012-05-31 | 2012-05-31 | Emergency two-circuit power steering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210176375 CN102700603B (en) | 2012-05-31 | 2012-05-31 | Emergency two-circuit power steering system |
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| CN102700603A true CN102700603A (en) | 2012-10-03 |
| CN102700603B CN102700603B (en) | 2013-12-25 |
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| CN 201210176375 Active CN102700603B (en) | 2012-05-31 | 2012-05-31 | Emergency two-circuit power steering system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975767A (en) * | 2012-12-17 | 2013-03-20 | 沙市久隆汽车动力转向器有限公司 | Switching valve for double-circuit assisted steering gear |
| CN103742401A (en) * | 2014-01-07 | 2014-04-23 | 南通环球转向器制造有限公司 | Emergency pump |
| CN105346595A (en) * | 2015-12-04 | 2016-02-24 | 广西玉柴机器股份有限公司 | Steering system |
| CN107554602A (en) * | 2017-08-17 | 2018-01-09 | 北京福田戴姆勒汽车有限公司 | Emergency double loop hydraulic booster steering, vehicle and method |
| CN107628103A (en) * | 2017-08-17 | 2018-01-26 | 北京福田戴姆勒汽车有限公司 | Method of testing, system and the vehicle of double loop hydraulic booster steering |
| CN112700982A (en) * | 2020-12-14 | 2021-04-23 | 河南平高电气股份有限公司 | Hydraulic operating mechanism of circuit breaker |
| CN113942569A (en) * | 2021-11-30 | 2022-01-18 | 东风商用车有限公司 | Emergency power-assisted steering system and method |
| CN114248839A (en) * | 2022-01-26 | 2022-03-29 | 湖南三一中型起重机械有限公司 | Vehicle emergency steering hydraulic system and working vehicle |
| CN114382869A (en) * | 2022-01-24 | 2022-04-22 | 一汽解放汽车有限公司 | Gearbox assembly and vehicle |
| CN114590314A (en) * | 2022-03-22 | 2022-06-07 | 三一汽车起重机械有限公司 | Emergency steering system, chassis and operation machine |
| CN112700982B (en) * | 2020-12-14 | 2024-04-16 | 河南平高电气股份有限公司 | Hydraulic operating mechanism of circuit breaker |
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| CN201849525U (en) * | 2010-10-15 | 2011-06-01 | 北京京城重工机械有限责任公司 | Emergency steering system of vehicle |
| CN202669911U (en) * | 2012-05-31 | 2013-01-16 | 陕西秦川机械发展股份有限公司 | Novel emergency double-loop steering booster system |
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| CN105346595A (en) * | 2015-12-04 | 2016-02-24 | 广西玉柴机器股份有限公司 | Steering system |
| CN107554602A (en) * | 2017-08-17 | 2018-01-09 | 北京福田戴姆勒汽车有限公司 | Emergency double loop hydraulic booster steering, vehicle and method |
| CN107628103A (en) * | 2017-08-17 | 2018-01-26 | 北京福田戴姆勒汽车有限公司 | Method of testing, system and the vehicle of double loop hydraulic booster steering |
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| CN112700982B (en) * | 2020-12-14 | 2024-04-16 | 河南平高电气股份有限公司 | Hydraulic operating mechanism of circuit breaker |
| CN113942569A (en) * | 2021-11-30 | 2022-01-18 | 东风商用车有限公司 | Emergency power-assisted steering system and method |
| CN114382869A (en) * | 2022-01-24 | 2022-04-22 | 一汽解放汽车有限公司 | Gearbox assembly and vehicle |
| CN114248839A (en) * | 2022-01-26 | 2022-03-29 | 湖南三一中型起重机械有限公司 | Vehicle emergency steering hydraulic system and working vehicle |
| CN114590314A (en) * | 2022-03-22 | 2022-06-07 | 三一汽车起重机械有限公司 | Emergency steering system, chassis and operation machine |
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