CN105197104A - Hydraulic steering system - Google Patents
Hydraulic steering system Download PDFInfo
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- CN105197104A CN105197104A CN201510617293.2A CN201510617293A CN105197104A CN 105197104 A CN105197104 A CN 105197104A CN 201510617293 A CN201510617293 A CN 201510617293A CN 105197104 A CN105197104 A CN 105197104A
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- steering
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- electromagnetic valve
- flux amplification
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Abstract
The invention relates to a hydraulic steering system, and aims at overcoming the defect that an existing hydraulic steering system is large in impact. The hydraulic steering system comprises steering cylinders, a flow amplifying valve, a steering pump and a steering device, the steering pump is connected with the steering device and the flow amplifying valve, the steering cylinders are connected with the flow amplifying valve, the steering pump supplies oil to the steering pump through the flow amplifying valve, and the control output end of the steering device is connected with the hydraulic control end of the flow amplifying valve; the hydraulic steering system further comprises a control device, and normally open solenoid valves are connected between the control output end of the steering device and the hydraulic control end of the flow amplifying valve; the control device comprises trigger mechanisms which send out trigger signals when the steering cylinders stretch and retract to preset positions, and the control device is connected with the electronic control ends of the solenoid valves and closes the solenoid valves when the trigger mechanisms give out the trigger signals. According to the hydraulic steering system, non-contact cutting is adopted by a steering buffer limiting technology, and the impact force is reduced; steering is smooth and comfortable, a part which needs to be cut off and steered is not prone to damage and invalidation, and the steering reliability of a whole machine is improved.
Description
Technical field
The present invention relates to a kind of steering swivel system, more particularly, relate to a kind of hydrostatic steering system.
Background technology
For large-scale, heavy articulation steering vehicle, when car load is diverted to steering locking angle position, there are three kinds of major causes can cause the greater impact of front and back articulated mounting: first body quality inertia is large; It two is that the feel/road feel error that turns to of operator causes steering handwheel or steering tiller (joystick) excessive operation; It three is that steering hydraulic system could not throttling governing (flow of timely overflow or steering pump could not be turned down in time fast) in time.This enormous impact power of terminal that turns to is to the life and reliability of body structure reliability, Hydraulic System Reliability, even car load, and driver and crew's traveling comfort causes very large impact.The final limit technology of current heavy articulation steering vehicle has larger shortcoming and defect, explores new to turn to and limit control method necessitates.
1) the rubber damping buffer limit technology of Purely mechanical is domestic, the international spacing technology of articulation steering generally adopted at present.Primarily of limiting steering rubber block, welded type rigidity limiting steering bearing, steering cylinder, steering hydraulic system composition.Its principle is: when Vehicular turn is to end position (steering locking angle), first spacing rubber block contacts with limiting steering bearing, utilizes the damping energy-absorbing buffering characteristic of spacing rubber block, extends the damp impacts time, reduces the impulsive force of steering lock position.The energy that turns to that remaining does not have limited rubber block to absorb finally is eliminated by the rigid shock of spacing bearing again.Its advantage is that structure is simple, with low cost, and reliability is high, and its technical deficiency mainly contains:
(1) the damping energy absorption ability of limiting steering rubber block is limited, causes turning to the impulsive force of terminal very large;
(2) the welding processing accuracy requirement of the setting accuracy of limiting steering rubber block, rigid limit seat is high;
(3) ram ratio owing to turning to final position is comparatively large, and steering hydraulic system changes suddenly reliability decrease, vehicle because of the phenomenon such as discomfort of intense vibration reliability decrease, bridge operation personnel often because of pressure flow.
(4) spacing rubber block damping buffering performance is responsive to ambient temperature, temperature too low or too high time easily lost efficacy.
(5) heavy, large-sized articulated formula vehicle upper limit rubber block volume is larger, it is more obvious that above-mentioned shortcoming shows.
2) what mechanical jack cut off valve type turns to buffer limit technology, the limiting steering technology that current state, inside and outside indivedual articulation steering vehicle adopt.Primarily of hydraulic cutting valve, limit base, pipeline system composition.Its principle is access two shutoff valves of connecting between flux amplification valve, deflector, steering cylinder, when steering locking angle position, cuts off the hydraulic oil entering the large loculus of steering cylinder, thus realizes the buffering of steering lock position.Its advantage is that cut-out is rapid, damping effect is better, compatible with environment is stronger.Its technical deficiency mainly contains:
(1) shutoff valve is on-off principle, breaking moment, and hydraulic efficiency pressure system internal pressure impacts still larger;
(2) require higher to the installation accuracy of manufacture of shutoff valve and limiting stopper (bar), adjustment difficulty is large;
(3) be contact, impact large between parts, easily lost efficacy.
Summary of the invention
The technical problem to be solved in the present invention impacts shortcoming that is large, that easily lost efficacy for existing hydrostatic steering system, and provide that a kind of impulsive force is little, the hydrostatic steering system of the not fragile inefficacy of parts.
The present invention is the technical scheme realizing its object is such: construct a kind of hydrostatic steering system, comprise steering cylinder, flux amplification valve, steering pump, deflector, described steering pump is connected with deflector and flux amplification valve, steering cylinder is connected with flux amplification valve, steering pump through flux amplification valve to steering pump fuel feeding, characterized by further comprising control setup, the first electromagnetic valve is connected with between the left mouth of described deflector and the hydraulic control left end of flux amplification valve, the second electromagnetic valve is connected with between the right wing mouth of described deflector and the hydraulic control right-hand member of flux amplification valve, described control setup comprises and the spacing trigger mechanism of the left steering of the first electromagnetic valve linking and the spacing trigger mechanism of right steering with described second electromagnetic valve linking.
In the present invention, when hydraulic ram promotion car body turns to, when left steering or right steering are to certain angle, the corresponding spacing trigger mechanism of left steering or the spacing trigger mechanism of right steering send energizing signal, close the first corresponding electromagnetic valve or the second electromagnetic valve, flux amplification valve stops to steering cylinder fuel feeding, thus realizes cut-out and turn to.The buffer limit technology that turns to of hydrostatic steering system of the present invention is contactless cut-out, reduces impulsive force; Turn to comfortable gently, cut off the not fragile inefficacy of parts itself turned to, improve complete machine and turn to reliability.
In above-mentioned hydrostatic steering system, described control setup also comprises controller, the spacing trigger mechanism of described left steering is connected with described controller with the spacing trigger mechanism of right steering, described controller have two with described first electromagnetic valve, the corresponding control output end connected of the automatically controlled end of the second electromagnetic valve, when described controller receives the energizing signal of the spacing trigger mechanism of left steering or right steering spacing trigger mechanism, the control output end of its correspondence exports the current potential making the first electromagnetic valve or the second closed electromagnetic valve.Now the spacing trigger mechanism of described left steering and the spacing trigger mechanism of right steering are angular transducers for measuring steering angle or for measuring the flexible displacement pickup of steering cylinder.
In above-mentioned hydrostatic steering system, described control setup also can be only made up of the spacing trigger mechanism of left steering and the spacing trigger mechanism of right steering, and the spacing trigger mechanism of such as left steering and the spacing trigger mechanism of right steering are two trigger switches be connected with corresponding described first electromagnetic valve and the automatically controlled end of the second electromagnetic valve respectively.
In above-mentioned hydrostatic steering system, described flux amplification valve comprises main valve, pressure-gradient control valve, the oil inlet of described pressure-gradient control valve is connected with described steering pump, the preferential output oil port of pressure-gradient control valve is connected with the oil inlet of main valve, the left end hydraulic control end of described main valve is connected with the first electromagnetic valve, and the right-hand member hydraulic control end of described main valve is connected with the second electromagnetic valve.
In above-mentioned hydrostatic steering system, described first electromagnetic valve is two-bit triplet electromagnetic valve, the left mouth of its oil inlet and described deflector, one of them oil outlet is connected with the hydraulic control left end of flux amplification valve, another one outlet is connected with fuel tank loop, the hydraulic control left end conducting of described oil inlet and flux amplification valve when described first electromagnetic valve is in normally open position, the hydraulic control left end conducting of flux amplification valve and the conducting of fuel tank loop when described first electromagnetic valve is in rest position; Described equally the second electromagnetic valve is two-bit triplet electromagnetic valve, the right wing mouth of its oil inlet and described deflector, one of them oil outlet is connected with the hydraulic control right-hand member of flux amplification valve, another one outlet is connected with fuel tank loop, the hydraulic control right-hand member conducting of described oil inlet and flux amplification valve when described second electromagnetic valve is in normally open position, the hydraulic control right-hand member conducting of flux amplification valve and the conducting of fuel tank loop when described second electromagnetic valve is in rest position.
The invention has the beneficial effects as follows:
1, the buffer limit technology that turns to of electromagnetic shut-off valve formula is contactless cut-out, reduces impulsive force.
2, not by the impact of ambient temperature.
3, turn to comfortable gently, improve complete machine and turn to reliability.
4, the not fragile inefficacy of limiting component itself.
5, different tonnage articulated vehicle, can regulate the sensor location on steering cylinder, regulates steering angle.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of fluid-link steering of the present invention.
Parts title and sequence number in figure:
Steering cylinder 1, flux amplification valve 2, main valve 21, pressure-gradient control valve 22, first electromagnetic valve 31, second electromagnetic valve 32, deflector 4, reducing valve 5, by pass valve 6, steering pump 7, oil return filter 8, fuel tank 9.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments is described.
As shown in Figure 1, hydrostatic steering system in the present embodiment, bag steering cylinder 1, flux amplification valve 2, steering pump 7, deflector 4, flux amplification valve 2 comprises main valve 21, pressure-gradient control valve 22, the oil inlet of pressure-gradient control valve 22 is the P hydraulic fluid port of flux amplification valve 2, the preferential output oil port of pressure-gradient control valve 22 is connected with the oil inlet of main valve 21, and the another one hydraulic fluid port of pressure-gradient control valve 22 is PB hydraulic fluid port, can be connected and to this hydraulic efficiency pressure system fuel feeding with other hydraulic efficiency pressure systems on machine or vehicle.
The pumping hole of steering pump 7 is connected with the P hydraulic fluid port of flux amplification valve 2, and the actuator port A hydraulic fluid port of flux amplification valve 2 is communicated with loculus with the large chamber of steering cylinder 1 respectively with B hydraulic fluid port, and steering pump 7 passes through flux amplification valve 2 to steering cylinder 1 fuel feeding.
The pumping hole of steering pump 7 is also connected with the oil inlet of deflector 4 by reducing valve 5, deflector 4 left mouth first electromagnetic valve 31, first electromagnetic valve 31 is connected with the hydraulic control left end Pa hydraulic fluid port of main valve 21, deflector 4 right wing mouth second electromagnetic valve 32, second electromagnetic valve 32 is connected with the hydraulic control right-hand member Pb hydraulic fluid port of main valve 21.First electromagnetic valve 31 and the second electromagnetic valve 32 are normally open solenoid valve.First electromagnetic valve 31 is two-bit triplet electromagnetic valve, the left mouth of its oil inlet and deflector 4, one of them oil outlet is connected with the hydraulic control left end Pa hydraulic fluid port of main valve 21, another one outlet is connected with fuel tank loop, the hydraulic control left end Pa hydraulic fluid port conducting of oil inlet and main valve 21 when first electromagnetic valve 31 is in normally open position, the hydraulic control left end Pa hydraulic fluid port of main valve 21 and the conducting of fuel tank loop when the first electromagnetic valve 31 is in rest position.Second electromagnetic valve 32 is equally also two-bit triplet electromagnetic valve, the right wing mouth of its oil inlet and deflector, one of them oil outlet is connected with the hydraulic control right-hand member Pb hydraulic fluid port of main valve 21, another one outlet is connected with fuel tank loop, the hydraulic control right-hand member Pb hydraulic fluid port conducting of oil inlet and main valve when second electromagnetic valve 32 is in normally open position, the hydraulic control right-hand member Pb hydraulic fluid port conducting of main valve 21 and the conducting of fuel tank loop when the second electromagnetic valve 32 is in rest position.
The T hydraulic fluid port of flux amplification valve 2 is connected with fuel tank 9 through oil return filter 8, and between oil return filter 8 and the pumping hole of steering pump, be connected with by pass valve 6, by pass valve 6 plays the effect of overflow protection.
In the present embodiment, also comprise two trigger switches, the first trigger switch and the second trigger switch respectively, corresponding to the spacing trigger mechanism of left steering and the spacing trigger mechanism of right steering, this trigger switch can be optoelectronic induction or magnetic induction switch, this trigger switch is arranged on hydraulic ram or on articulated frame, and this trigger switch is connected with the automatically controlled end of electromagnetic valve.When steering cylinder flexible to a certain extent or articulated frame turn to turn to desired location time, such as, when left steering is to certain position, first trigger switch triggers, the first electromagnetic valve that associated connects switches to and blocks off position, pressure-gradient control valve is in left position, and the pressure oil that steering pump feeds to flux amplification valve flows out from PB hydraulic fluid port, and flux amplification valve is no longer to steering cylinder fuel feeding, steering cylinder stops flexible, thus realizes the function of limiting steering buffering.Now, the left hydraulic control end of main valve blocks position and fuel tank circuit communication by the first electromagnetic valve, and the right hydraulic control end of main valve is still communicated with the right wing mouth of deflector by the normally open position of the second electromagnetic valve.If now think, opposite sense turns to, such as steering wheel rotation from left steering right-hand turning to, the spool of the oil circuit mouth pressure oil output promotion main valve of now deflector moves, pressure-gradient control valve replaces, steering pump is through pressure-gradient control valve, main valve is to steering cylinder fuel feeding, steering cylinder promotes complete machine and turns to, thus make the first trigger switch leave spacing trigger position, after first trigger switch leaves trigger position, first trigger switch disconnects, first electromagnetic valve gets back to normally open position, the hydraulic control left end Pa hydraulic fluid port of main valve is through the left mouth conducting of electromagnetic valve and deflector, realize the control of deflector to flux amplification valve.In the present embodiment, left steering oil circuit control and the right steering oil circuit control of deflector and flux amplification valve are symmetrical, each parts of right steering and the operating state of oil circuit identical with left steering.
In the present embodiment, the control setup that Controlling solenoid valve makes on-off action can also be made up of controller and trigger mechanism, trigger mechanism is connected with controller, the control output end of controller is connected with the automatically controlled end of electromagnetic valve, and when controller receives the energizing signal of trigger mechanism, its control output end exports the current potential making closed electromagnetic valve.Now described trigger mechanism can be the flip flop equipment that can trigger respectively at left steering restraining position and right steering restraining position, such as, be angular transducer for measuring steering angle or for measuring the flexible displacement pickup of steering cylinder.
Claims (6)
1. a hydrostatic steering system, comprise steering cylinder, flux amplification valve, steering pump, deflector, described steering pump is connected with deflector and flux amplification valve, steering cylinder is connected with flux amplification valve, steering pump through flux amplification valve to steering pump fuel feeding, characterized by further comprising control setup, the first electromagnetic valve is connected with between the left mouth of described deflector and the hydraulic control left end of flux amplification valve, the second electromagnetic valve is connected with between the right wing mouth of described deflector and the hydraulic control right-hand member of flux amplification valve, described control setup comprises and the spacing trigger mechanism of the left steering of the first electromagnetic valve linking and the spacing trigger mechanism of right steering with described second electromagnetic valve linking.
2. hydrostatic steering system according to claim 1, is characterized in that the spacing trigger mechanism of described left steering is the first trigger switch be connected with the automatically controlled end of the first electromagnetic valve; The spacing trigger mechanism of described right steering is the second trigger switch be connected with the automatically controlled end of described second electromagnetic valve.
3. hydrostatic steering system according to claim 1, it is characterized in that described control setup also comprises controller, the spacing trigger mechanism of described left steering is connected with described controller with the spacing trigger mechanism of right steering, described controller have two with described first electromagnetic valve, the corresponding control output end connected of the automatically controlled end of the second electromagnetic valve, when described controller receives the energizing signal of the spacing trigger mechanism of left steering or right steering spacing trigger mechanism, the control output end of its correspondence exports the current potential making the first electromagnetic valve or the second closed electromagnetic valve.
4. hydrostatic steering system according to claim 3, is characterized in that the spacing trigger mechanism of described left steering and the spacing trigger mechanism of right steering are angular transducers for measuring steering angle or for measuring the flexible displacement pickup of steering cylinder.
5. hydrostatic steering system according to claim 1, it is characterized in that described flux amplification valve comprises main valve, pressure-gradient control valve, the oil inlet of described pressure-gradient control valve is connected with described steering pump, the preferential output oil port of pressure-gradient control valve is connected with the oil inlet of main valve, the left end hydraulic control end of described main valve is connected with the first electromagnetic valve, and the right-hand member hydraulic control end of described main valve is connected with the second electromagnetic valve.
6. hydrostatic steering system according to any one of claim 1 to 5, it is characterized in that described first electromagnetic valve is two-bit triplet electromagnetic valve, the left mouth of its oil inlet and described deflector, one of them oil outlet is connected with the hydraulic control left end of flux amplification valve, another one outlet is connected with fuel tank loop, the hydraulic control left end conducting of described oil inlet and flux amplification valve when described first electromagnetic valve is in normally open position, the hydraulic control left end conducting of flux amplification valve and the conducting of fuel tank loop when described first electromagnetic valve is in rest position; Described second electromagnetic valve is two-bit triplet electromagnetic valve, the right wing mouth of its oil inlet and described deflector, one of them oil outlet is connected with the hydraulic control right-hand member of flux amplification valve, another one outlet is connected with fuel tank loop, the hydraulic control right-hand member conducting of described oil inlet and flux amplification valve when described second electromagnetic valve is in normally open position, the hydraulic control right-hand member conducting of flux amplification valve and the conducting of fuel tank loop when described second electromagnetic valve is in rest position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617293.2A CN105197104A (en) | 2015-09-25 | 2015-09-25 | Hydraulic steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617293.2A CN105197104A (en) | 2015-09-25 | 2015-09-25 | Hydraulic steering system |
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| CN105197104A true CN105197104A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510617293.2A Pending CN105197104A (en) | 2015-09-25 | 2015-09-25 | Hydraulic steering system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905288A (en) * | 2017-11-01 | 2018-04-13 | 广西柳工机械股份有限公司 | Loading machine double speed steering control system |
| CN110466603A (en) * | 2019-08-27 | 2019-11-19 | 北京航天发射技术研究所 | Integral steering system installs limiting device |
| CN112550446A (en) * | 2020-12-17 | 2021-03-26 | 航天重型工程装备有限公司 | Steering system |
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
| CN114670917A (en) * | 2022-04-14 | 2022-06-28 | 山东蓬翔汽车有限公司 | Manual and wire-controlled double-control steering system for vehicle and control method thereof |
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| JP2007038885A (en) * | 2005-08-04 | 2007-02-15 | Hitachi Ltd | Power steering device |
| CN104015798A (en) * | 2014-01-09 | 2014-09-03 | 广西柳工机械股份有限公司 | Hydraulic steering system for engineering machinery |
| CN104029722A (en) * | 2014-01-23 | 2014-09-10 | 广西柳工机械股份有限公司 | Hydraulic steering system of engineering machine |
| CN104401390A (en) * | 2014-11-04 | 2015-03-11 | 广西柳工机械股份有限公司 | Non-contact steering limiting proportional control system and proportional control method |
-
2015
- 2015-09-25 CN CN201510617293.2A patent/CN105197104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007038885A (en) * | 2005-08-04 | 2007-02-15 | Hitachi Ltd | Power steering device |
| CN104015798A (en) * | 2014-01-09 | 2014-09-03 | 广西柳工机械股份有限公司 | Hydraulic steering system for engineering machinery |
| CN104029722A (en) * | 2014-01-23 | 2014-09-10 | 广西柳工机械股份有限公司 | Hydraulic steering system of engineering machine |
| CN104401390A (en) * | 2014-11-04 | 2015-03-11 | 广西柳工机械股份有限公司 | Non-contact steering limiting proportional control system and proportional control method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905288A (en) * | 2017-11-01 | 2018-04-13 | 广西柳工机械股份有限公司 | Loading machine double speed steering control system |
| CN107905288B (en) * | 2017-11-01 | 2019-11-19 | 广西柳工机械股份有限公司 | Loading machine double speed steering control system |
| CN110466603A (en) * | 2019-08-27 | 2019-11-19 | 北京航天发射技术研究所 | Integral steering system installs limiting device |
| CN110466603B (en) * | 2019-08-27 | 2021-12-14 | 北京航天发射技术研究所 | Integrated steering system mounting and limiting device |
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
| CN112550446A (en) * | 2020-12-17 | 2021-03-26 | 航天重型工程装备有限公司 | Steering system |
| CN114670917A (en) * | 2022-04-14 | 2022-06-28 | 山东蓬翔汽车有限公司 | Manual and wire-controlled double-control steering system for vehicle and control method thereof |
| CN114670917B (en) * | 2022-04-14 | 2024-04-05 | 山东蓬翔汽车有限公司 | Manual and wire-control double-control steering system for vehicle and control method thereof |
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Application publication date: 20151230 |
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