CN102616274A - Closed-core load balanced type full hydraulic steering gear - Google Patents
Closed-core load balanced type full hydraulic steering gear Download PDFInfo
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- CN102616274A CN102616274A CN2012101021966A CN201210102196A CN102616274A CN 102616274 A CN102616274 A CN 102616274A CN 2012101021966 A CN2012101021966 A CN 2012101021966A CN 201210102196 A CN201210102196 A CN 201210102196A CN 102616274 A CN102616274 A CN 102616274A
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- actuator port
- hydraulic steering
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Abstract
The invention discloses a closed-core load balanced type full hydraulic steering gear which comprises an oil inlet P1, an oil returning opening T1, a left operating oil opening L1 and a right operating oil opening R1. Damping hole channels are reserved at the left operating oil opening L1 and the right operating oil opening R1. When the steering gear is in the middle, the damping hole channels are communicated with the oil inlet P1 or the oil returning opening T1. The steering gear has the advantages that oil pressure of the operating oil openings at load ends reaches balance when the steering gear stops rotating, turning is stopped in time, flexibility and reliability of the steering gear are enhanced evidently, shaking of a vehicle is eliminated when the turning is stopped, impact is reduced and comfort and safety of the vehicle are enhanced.
Description
Technical field
The present invention relates to the deflector of construction machinery and equipment wheeled car all hydraulic pressure steering-gear, particularly a kind of heart load all-hydraulic steering gear that closes.
Background technology
In current home market, close the reactionless all-hydraulic steering gear pilot flow of the heart and amplify the change-over valve steering swivel system through being usually used in heavily loaded engineering truck, like large-scale fork truck, loader, waste-skip and weight greater than other special vehicle more than 100 tons.
Can find out by accompanying drawing 1, stop operating when getting back to meta that left actuator port 7 cuts out with right actuator port 8 fully in deflector 1; But a wherein end of flow gain change-over valve core 3 also keeps certain working pressure; Right-hand member keeps pressure when being the right steering end, left end kept pressure when left steering finished, and the pull back spring of flow gain change-over valve 2 also is in the smaller state of amount of compression this moment, and its predetermincd tension compares less; Be not enough to flow gain change-over valve core 3 is pushed back meta; Oil inlet 9 can not break off with right oil outlet 12 or left oil outlet 11, and flow gain change-over valve 2 is pressure oil output still, and motor turning work can not stop.Reflection on the engineering wheeled car is exactly driver's bearing circle that stops operating, and when deflector stopped operating, vehicle can produce tangible shake, and this produces very big impact, initiation potential to occupant and goods.
In order to address this problem, the method for taking at present generally is to amplify the inner tolerance clearance of all-hydraulic steering gear, i.e. gap between amplifying and steering device spool and the valve pocket, and when deflector stops operating, right actuator port R
1With right oil outlet R
2Between, left actuator port L
1With left oil outlet L
2Between pipeline in-to-in high pressure oil go out through the inner clearance leakage of amplifying of deflector, make the flow gain change-over valve core get back to meta.Properties of product when this way has not only reduced the deflector normal operation can not thoroughly be dealt with problems, and gap leakage flow rate is limited after all, can only be the secondary degree that has relaxed the vehicle shake.
Summary of the invention
Goal of the invention: to the problems referred to above; The purpose of this invention is to provide a kind of heart load balance type all-hydraulic steering gear that closes, solve the problem of using the engineering wheeled car that closes the reactionless all-hydraulic steering gear pilot flow amplification of heart change-over valve steering swivel system when all-hydraulic steering gear stops operating, can not in time stop to turn to work.
Technical scheme: a kind of heart load balance type all-hydraulic steering gear that closes comprises oil inlet P
1, oil return inlet T
1, left actuator port L
1, right actuator port R
1, said left actuator port L
1Place and said right actuator port R
1The place all offer the damping hole passage, when deflector is in meta, said damping hole passage all with said oil inlet P
1Be communicated with or all with said oil return inlet T
1Be communicated with.
The present invention closes heart load balance type all-hydraulic steering gear and flow gain change-over valve, turns to oil cylinder to constitute steering hydraulic system, when normal direction of rotation is worked, closes heart load balance type all-hydraulic steering gear and closes the same work of the reactionless all-hydraulic steering gear of the heart.Stop operating left actuator port L when getting back to meta when closing heart load balance type all-hydraulic steering gear
1With right actuator port R
1Fluid through damping hole passage and oil inlet P
1Be communicated with, perhaps with oil return inlet T
1Be communicated with, promptly be communicated with, even the spool two ends of flow gain change-over valve are through left actuator port L with fuel tank
1With right actuator port R
1Be communicated with fuel tank, reach the spool pressure at two ends balance of flow gain change-over valve, thereby make the pull back spring of flow gain change-over valve can make the spool of flow gain change-over valve get back to meta rapidly, make the oil inlet P of flow gain change-over valve
2Left oil outlet L with the flow gain change-over valve
2Or right oil outlet R
2In time break off, cut off and turn to oil circuit, in time stop to turn to work.
Said left actuator port L
1Place and said right actuator port R
1The said damping hole passage at place is at least one.
Beneficial effect: compared with prior art; Advantage of the present invention is deflector when stopping operating, and the oil pressure of load end actuator port reaches balance, makes to turn to work in time to stop; Sensitieness, the reliability of deflector significantly improve; The jitter phenomenon of vehicle when elimination stops to turn to reduces and impacts, and improves driving comfort level and safety.
Description of drawings
Fig. 1 is for using the existing steering hydraulic system schematic diagram that closes the reactionless all-hydraulic steering gear of the heart;
Fig. 2 is for using the steering hydraulic system schematic diagram that the present invention closes heart load balance type all-hydraulic steering gear;
Structure was launched scheme drawing when Fig. 3 closed heart load balance type all-hydraulic steering gear meta for the present invention among the embodiment 1;
Structure was launched scheme drawing when Fig. 4 closed heart load balance type all-hydraulic steering gear right steering for the present invention among the embodiment 1;
Structure was launched scheme drawing when Fig. 5 closed heart load balance type all-hydraulic steering gear left steering for the present invention among the embodiment 1;
Fig. 6 is the partial enlarged view I among Fig. 3;
Fig. 7 is the A-A cutaway view of Fig. 6;
Structure was launched scheme drawing when Fig. 8 closed heart load balance type all-hydraulic steering gear meta for the present invention among the embodiment 2;
Fig. 9 is the damping hole channel architecture scheme drawing of embodiment 3;
Figure 10 is the B-B cutaway view of Fig. 9;
Figure 11 is the damping hole channel architecture scheme drawing of embodiment 4;
Figure 12 is the C-C cutaway view of Figure 11;
Figure 13 is the damping hole channel architecture scheme drawing of embodiment 5;
Figure 14 is the D-D cutaway view of Figure 13;
Figure 15 is the damping hole channel architecture scheme drawing of embodiment 6;
Figure 16 is the E-E cutaway view of Figure 15;
Figure 17 is the damping hole channel architecture scheme drawing of embodiment 7;
Figure 18 is the F-F cutaway view of Figure 17;
Figure 19 is the damping hole channel architecture scheme drawing of embodiment 8;
Figure 20 is the G-G cutaway view of Figure 19.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Embodiment 1: shown in accompanying drawing 2,1 for the present invention close heart load balance type all-hydraulic steering gear, 2 for the flow gain change-over valve, 3 for flow gain change-over valve core, 4 for turning to oil cylinder, 5-8 is respectively the oil inlet P of closing heart load balance type all-hydraulic steering gear 1
1, oil return inlet T
1, left actuator port L
1, right actuator port R
1, 9-12 is respectively the oil inlet P of flow gain change-over valve 2
2, oil return inlet T
2, left oil outlet L
2, right oil outlet R
2, 13 is left actuator port L
1Place and right actuator port R
1The damping hole passage that the place offers; Left side actuator port 7, right actuator port 8 connect flow gain change-over valve core 3 left ends and right-hand member respectively.The principle of work that application the present invention closes the steering hydraulic system of heart load balance type all-hydraulic steering gear is: when closing heart load balance type all-hydraulic steering gear 1 beginning turning clockwise; Right actuator port 8 pressure oil output, fluid leads to flow gain change-over valve core 3 right-hand members, promotes flow gain change-over valve core 3 and moves to left end; Right oil outlet 12 and oil inlet 9 UNICOMs; Right oil outlet 12 pressure oil output promote to turn to oil cylinder 4 work, and automobile is accomplished right-hand turning to work; When closing heart load balance type all-hydraulic steering gear 1 and begin to turn left, automobile is accomplished left-handed turning to work; Stop operating when getting back to meta when closing heart load balance type all-hydraulic steering gear 1; Damping hole passage 13 all is communicated with return opening 6; Fluid is got back to fuel tank, and promptly left actuator port 7 all is communicated with return opening 6 with right actuator port 8, makes flow gain change-over valve core 3 pressure at two ends balances; Thereby the pull back spring that makes flow gain change-over valve 2 can make flow gain change-over valve core 3 get back to meta rapidly; Make the oil inlet 9 of flow gain change-over valve 2 and the left oil outlet 11 or the right oil outlet 12 of flow gain change-over valve 2 in time break off, cut off and turn to oil circuit, in time stop to turn to work.
Shown in accompanying drawing 3, the present invention closes heart load balance type all-hydraulic steering gear and closes the reactionless all-hydraulic steering gear structure of heart something in common and be with existing: the valve body of deflector, valve pocket, spool are cylindrical, and spool is inner at valve pocket, and valve pocket is at valve inner.All rectangular lines are the oil groove of crossing on the spool; All circles are the oil-through hole on the valve pocket; The oil inlet 5 of deflector, return opening 6, left actuator port 7, right actuator port 8 and the rectangle 14 that is communicated with gauging device are the circular groove of valve inner; The return opening 6 of valve inner is communicated with and oil sump tank with four oil-through holes 15 on the valve pocket; The left actuator port 7 of valve inner is communicated with and is communicated with flow gain change-over valve core left end with six oil-through holes 16 on the valve pocket; Right actuator port 8 in the valve body is communicated with and is communicated with flow gain change-over valve core right-hand member with six oil-through holes 17 on the valve pocket, and the oil inlet 5 in the valve body is communicated with and is communicated with the fuel feeding oil pump with six oil-through holes 18 on the valve pocket; What be communicated with gauging device in the valve body is seven holes; Be communicated with seven cavitys of gauging device; These seven holes in the valve body are a kind of particular form with 12 oil-through holes 19 on the valve pocket and are communicated with, and six holes that 12 oil-through holes, the 19 every intervals on the assurance valve pocket are are communicated with three cavitys of gauging device, and six holes are communicated with three cavitys in addition of gauging device in addition; Remaining in a gauging device cavity is transition condition, and servo-actuated changes when deflector is worked.Spool and valve pocket guarantee meta through the deflector pull back spring, because receive the effect of pull back spring, can only relatively rotate between spool and the valve pocket and be not more than 10 ° corner, and spool and valve pocket one can the infinitely rotations of angle in valve body.The present invention closes heart load balance type all-hydraulic steering gear and closes the reactionless all-hydraulic steering gear structure of heart difference and be with existing: offer rectangle grooving 20 on the spool, i.e. damping hole passage and links to each other with the oil groove 21 of crossing of oil-through hole 15 1 sides.When closing heart load balance type all-hydraulic steering gear meta: oil-through hole 16, oil-through hole 17 were communicated to oil groove 21, oil-through hole 15, return opening 6 through rectangle grooving 20 and got back to fuel tank; The fluid of left actuator port 7, right actuator port 8 is communicated with; Reach load oil pressure balance, this moment, left actuator port 7, right actuator port 8 were zero pressure; So oil inlet 5 has high pressure oil because of being communicated with the fuel feeding oil pump, the oil-through hole 18 that is communicated with oil inlet 5 also has high pressure oil.
Shown in accompanying drawing 4; When closing heart load balance type all-hydraulic steering gear right steering: the relative valve pocket of spool produces an angle, promptly crosses the relative oil-through hole of oil groove among the figure and moves down a segment distance, and rectangle grooving 20 breaks away from oil-through hole 17; Oil-through hole 18 with link to each other with the oil groove 22 of crossing of oil inlet 5 one sides; Cross oil groove 22 and oil-through hole 19 wherein six be communicated with, is communicated with through gauging device and six oil-through holes 19 of residue, and then is communicated with the mistake oil groove 23 of spool centre portion; Be communicated with oil-through hole 17, making in the right actuator port 8 has high pressure oil again; Oil-through hole 16 is communicated with mistake oil groove 21, is communicated with return opening 6 through oil-through hole 15 again, gets back to fuel tank; The work of completion right steering.The present invention closes the work of heart load balance type all-hydraulic steering gear right steering and existing to close the work of the reactionless all-hydraulic steering gear right steering of the heart the same, and the existence of rectangle grooving 20 does not influence normal right steering work.
Shown in accompanying drawing 5; When closing heart load balance type all-hydraulic steering gear left steering: the relative valve pocket of spool produces an angle; Promptly cross the relative oil-through hole of the oil groove segment distance that moves up among the figure, rectangle grooving 20 breaks away from oil-through hole 16, and it turns to principle of work identical with right steering; The present invention closes the work of heart load balance type all-hydraulic steering gear left steering and existing to close the work of the reactionless all-hydraulic steering gear left steering of the heart the same, and the existence of rectangle grooving 20 does not influence normal left steering work.
Like accompanying drawing 6, shown in 7; The damping hole passage, be perpendicular to poppet shaft to the direction of the route rectangle grooving 20 that to mill out a cross-sectional plane be circular arc, link to each other with the oil groove 21 of crossing on the spool 24; During the deflector meta, be communicated with simultaneously with oil-through hole on the valve pocket 16 and oil-through hole 17.
Embodiment 2: basic identical with embodiment 1; Difference is: stop operating when getting back to meta when closing heart load balance type all-hydraulic steering gear 1, damping hole passage 13 all is communicated with oil inlet 5, and fluid is got back to fuel tank; Be that left actuator port 7 all is communicated with oil inlet 5 with right actuator port 8; Make flow gain change-over valve core 3 pressure at two ends balances, thereby make the pull back spring of flow gain change-over valve 2 can make flow gain change-over valve core 3 get back to meta rapidly, make the oil inlet 9 of flow gain change-over valve 2 and the left oil outlet 11 or the right oil outlet 12 of flow gain change-over valve 2 in time break off; Cut-out turns to oil circuit, in time stops to turn to work.
Shown in accompanying drawing 8; The rectangle grooving of offering on the spool 20 is communicated with the oil groove 23 of crossing of spool centre portion; When closing heart load balance type all-hydraulic steering gear meta; Oil-through hole 16, oil-through hole 17 were communicated to oil groove 23 through rectangle grooving 20, and the fluid of left actuator port 7, right actuator port 8 is communicated with, and reached load balance.But this moment, left actuator port 7, right actuator port 8 were high pressure; Though also can reach the purpose of load balance; Also can eliminate the problem that turns to vehicle shake when stopping; But because left actuator port 7, right actuator port 8 keep high pressure when meta, may make when turning to beginning, flow gain change-over valve core 3 one distal process so lose high pressure and the other end keeps high pressure to cause turning to when initial vehicle to be shaken.
Embodiment 3: like accompanying drawing 9, shown in 10, basic identical with embodiment 1 or embodiment 2, difference is: the damping hole passage is crossed directly to widen on the oil groove at spool and is obtained.
Embodiment 4: like accompanying drawing 11, shown in 12, basic identical with embodiment 1 or embodiment 2, difference is: the damping hole passage is to widen and obtain crossing part, oil groove edge with the approaching spool of oil-through hole.
Embodiment 5: like accompanying drawing 13, shown in 14, basic identical with embodiment 1 or embodiment 2, difference is: the damping hole passage is crossed the oil groove edge with spool and is all widened and obtain.
Embodiment 6: like accompanying drawing 15, shown in 16, basic identical with embodiment 1 or embodiment 2, difference is: the damping hole passage is to mill out one than the roundlet counterbore with end mil cutter crossing the oil groove edge with the approaching spool of oil-through hole.
Embodiment 7: like accompanying drawing 17, shown in 18, basic identical with embodiment 1 or embodiment 2, difference is: the damping hole passage is to cross on the oil groove at spool to mill the wedge angle hole that pin obtains with the wedge angle circular peripheral-mill.
Embodiment 8: like accompanying drawing 19, shown in 20, basic identical with embodiment 1, difference is: the damping hole passage is on valve pocket and spool, respectively to process an aperture, and fuel tank is directly led in spool heart portion.Directly on valve pocket and spool, process aperture with drill bit, easy to process, size and position degree are controlled well, and tooling cost is minimum, and flow control is more stable, and the Vehicular turn stationarity is good.
Claims (2)
1. one kind is closed heart load balance type all-hydraulic steering gear, comprises oil inlet P
1, oil return inlet T
1, left actuator port L
1, right actuator port R
1, it is characterized in that: said left actuator port L
1Place and said right actuator port R
1The place all offer the damping hole passage, when deflector is in meta, said damping hole passage all with said oil inlet P
1Be communicated with or all with said oil return inlet T
1Be communicated with.
2. the heart load balance type all-hydraulic steering gear that closes according to claim 1 is characterized in that: said left actuator port L
1Place and said right actuator port R
1The said damping hole passage at place is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101021966A CN102616274A (en) | 2012-04-01 | 2012-04-01 | Closed-core load balanced type full hydraulic steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101021966A CN102616274A (en) | 2012-04-01 | 2012-04-01 | Closed-core load balanced type full hydraulic steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102616274A true CN102616274A (en) | 2012-08-01 |
Family
ID=46556589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101021966A Pending CN102616274A (en) | 2012-04-01 | 2012-04-01 | Closed-core load balanced type full hydraulic steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102616274A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10278822A (en) * | 1997-03-31 | 1998-10-20 | Kayaba Ind Co Ltd | Rotary valve type power steering device |
| CN101233040A (en) * | 2005-07-27 | 2008-07-30 | 博世雷克斯罗思股份公司 | Electrohydraulic steering system |
| CN201240418Y (en) * | 2008-07-18 | 2009-05-20 | 镇江液压件厂有限责任公司 | Full closed-center cycloid rotary valve type hydrostatic power steering gear |
| US20090314572A1 (en) * | 2008-06-19 | 2009-12-24 | Trw Automotive U.S. Llc | Closed center valve steering system with adjustable pressure |
| CN201761535U (en) * | 2010-09-03 | 2011-03-16 | 武汉迈科机电物资工程有限公司 | Automotive steering hydraulic damping system |
| CN202541630U (en) * | 2012-04-01 | 2012-11-21 | 怀特(中国)驱动产品有限公司 | Closed-core load balanced type full-hydraulic steering gear |
-
2012
- 2012-04-01 CN CN2012101021966A patent/CN102616274A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10278822A (en) * | 1997-03-31 | 1998-10-20 | Kayaba Ind Co Ltd | Rotary valve type power steering device |
| CN101233040A (en) * | 2005-07-27 | 2008-07-30 | 博世雷克斯罗思股份公司 | Electrohydraulic steering system |
| US20090314572A1 (en) * | 2008-06-19 | 2009-12-24 | Trw Automotive U.S. Llc | Closed center valve steering system with adjustable pressure |
| CN201240418Y (en) * | 2008-07-18 | 2009-05-20 | 镇江液压件厂有限责任公司 | Full closed-center cycloid rotary valve type hydrostatic power steering gear |
| CN201761535U (en) * | 2010-09-03 | 2011-03-16 | 武汉迈科机电物资工程有限公司 | Automotive steering hydraulic damping system |
| CN202541630U (en) * | 2012-04-01 | 2012-11-21 | 怀特(中国)驱动产品有限公司 | Closed-core load balanced type full-hydraulic steering gear |
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Application publication date: 20120801 |