CN203427872U - Wheeled crane and steering hydraulic control system thereof - Google Patents
Wheeled crane and steering hydraulic control system thereof Download PDFInfo
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- CN203427872U CN203427872U CN201320538078.XU CN201320538078U CN203427872U CN 203427872 U CN203427872 U CN 203427872U CN 201320538078 U CN201320538078 U CN 201320538078U CN 203427872 U CN203427872 U CN 203427872U
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Abstract
The utility model discloses a steering hydraulic control system which comprises a front set vehicle wheel steering hydraulic control system and a rear set vehicle wheel steering hydraulic control system. The rear set vehicle wheel steering hydraulic control system comprises a constant displacement pump, a steering oil cylinder, a first control valve and a second control valve, wherein the first control valve and the second control valve are arranged between a hydraulic pump and a system oil return way. The first control valve controls the oil supply of the steering oil cylinder, and the second control valve controls the pressure buildup and decompression of the oil way where the steering oil cylinder located according to the working state of the first control valve. According to the steering hydraulic control system, the constant displacement pump is used as a power source, the fact that the steering oil cylinder drives the steering of rear set vehicle wheels is achieved by controlling the first control valve and the second control valve, and in addition, a locking oil cylinder and a control unit thereof are further eliminated. Compared with the prior art, the steering hydraulic control system is reduced obviously in manufacturing cost and size, the integral manufacturing cost of the steering hydraulic control system is lowered, and the application range is expanded. On this base, the utility model further discloses a wheeled crane comprising the steering hydraulic control system.
Description
Technical field
The utility model relates to wheel crane technical field, particularly a kind of wheel crane and turn to hydraulic control system.
Background technology
At present, engineering truck is by multi-mode steering function, to tackle normally travelling in complex road surface situation.Now in conjunction with Fig. 1, introduce conventional four kinds of engineering truck and turn to pattern, comprise that front group of independent steering A, rear group of independent steering B, little turning turn to C and crab row to turn to D; Wherein, when little turning turns to C before group wheel and rear group of wheel steering opposite direction, to realize minimum turn radius, when crab row turns to D before group wheel identical with the steering direction of rear group of wheel, because of just like crab walks gains the name.
Aforementioned four kinds turn to pattern to adopt to turn to hydraulic control system to control realization, and this concrete control principle that turns to hydraulic control system as shown in Figure 2.Forward and backward group of wheel steering adopts and independently turns to hydraulic control system to realize, and wherein, front group of wheel steering be by front group of gear type pump 10 ' provide pressure oil, recycling by the deflector of the first control cock group 11 ' form, directly controlled before group steering cylinder 12 ' complete; Rear group turns to hydraulic control system by rear group of controllable capacity pump 20 ' pressure oil is provided, and recycles rear group of steering cylinder 24 of the second control cock group 21 ' and the 3rd control cock group 22 ' control ' complete handling maneuver.
When rear group of steering cylinder 24 ' while not participating in turning to, the second control cock group 21 ' control actuator port A and B export without flow, meanwhile, by control N, T, X actuator port flow with utilize rear group of locking oil cylinder 23 of the 3rd control cock group 22 ' control ', make rear group of steering cylinder 24 ' in lockup state; Otherwise, when rear group of steering cylinder 24 ' participation turns to, the second control cock group 21 ' utilize the 3rd control cock group 22 ' make locking oil cylinder off-load by controlling N, T, X actuator port, thereby make rear group of steering cylinder 24 ' in released state, meanwhile, control A and B actuator port and carry out pressure, flow output, make rear group of steering cylinder 24 ' action, thereby after driving, group wheel produces corresponding handling maneuver.
As previously mentioned, in existing multi-mode steering system after group steering cylinder 24 ' propulsion source adopt controllable capacity pump, this controllable capacity pump regulates rate of discharge constant to maintain system internal pressure by quantitative control element automatically.But, due to controllable capacity pump complex structure, bulky, and make to turn to the whole manufacturing cost of hydraulic control system too high, and cannot meet the use of the narrow and small occasion of installing space.In order to address the above problem, can solve by the mode of fix-displacement pump substitute variable pump, but, owing to turning to pressure source in hydraulic control system to drive state in often, obviously simple by replacing the mode of pressure source, when not participating in turning to, rear group of wheel will cause the problem that rear group of hydraulic control steering swivel system cannot off-load.
In view of this, those skilled in the art urgently look for another way provides a kind of hydraulic control system that turns to, and existingly turns to that hydraulic control system cost is high, Applicable scope is because of the limited problem of installing space to solve.
Utility model content
For above-mentioned defect, core object of the present utility model is to provide a kind of hydraulic control system that turns to, to solve the problem that existing hydraulic control steering swivel system manufacturing cost is high and Applicable scope is limited.On this basis, utility model also provides a kind of above-mentioned wheel crane that turns to hydraulic control system that comprises.
The hydraulic control system that turns to provided by the utility model, a kind of hydraulic control system that turns to, comprises front group of wheel steering hydraulic control system and rear group of wheel steering hydraulic control system, described rear group of wheel steering hydraulic control system comprises:
Steering cylinder, for driving rear group of wheel steering, is characterized in that, also comprises:
Fix-displacement pump, with to described steering cylinder fuel feeding;
The first control cock, is arranged between described steering cylinder and described fix-displacement pump and system oil return oil circuit, by controlling the fuel feeding of described steering cylinder, so that the action of described steering cylinder or locking;
The second control cock, is arranged in parallel with described the first control cock, according to the mode of operation of described the first control cock, controls described steering cylinder place oil circuit and builds pressure or off-load.
Preferably, described the first control cock is two-bit triplet change-over valve, and is configured to: described the first control cock is positioned at meta, and described the second control cock is controlled the oil circuit off-load of described steering cylinder place; Described the first control cock switches to left position or right position, and described the second control cock is controlled described steering cylinder place oil circuit and built pressure.
Preferably, described second direction control cock comprises two position and four-way reversing valves and switch valve, the first actuator port of described two position and four-way reversing valves is communicated with described system oil return oil circuit, its second actuator port is communicated with described fix-displacement pump, its the 3rd actuator port and the 4th actuator port are respectively used to be communicated with two epitrochoidal chambers of vehicle secondary actuator, described switch valve is arranged between described the 4th actuator port and described vehicle secondary actuator, to control described the 4th actuator port and the conducting of described vehicle secondary actuator or disconnection;
Described the first control cock is positioned at meta, and described two position and four-way reversing valves and described switch valve are controlled that described fix-displacement pump is communicated with described system oil return oil circuit or be described vehicle secondary actuator fuel feeding; Described the first control cock switches to left position or right position, and it is described steering cylinder and/or described vehicle secondary actuator fuel feeding that described two position and four-way reversing valves and described switch valve are controlled described fix-displacement pump.
Preferably, also comprise controller, the signal output part of described controller is connected with the signal receiving end of described the second control cock with described the first control cock; Described controller sends corresponding control command according to Vehicular turn pattern to described the first control cock and described the second control cock.
Preferably, described controller also comprises:
Collecting unit, to obtain respectively described front group of wheel and described rear group of wheel with respect to the actual rotational angle value of vehicle heading;
Arithmetic element, according to the actual rotational angle value of Vehicular turn pattern and described front group of wheel, obtains the corresponding theory corner value of described rear group of wheel.
Preferably, described the first control cock is apportioning valve, and described controller is adjusted the valve port opening of described the first control cock according to the difference of the actual rotational angle value of described rear group of wheel and theoretical corner value.
The utility model also provides a kind of wheel crane, the front group of wheel and the rear group of wheel that comprise car body, drive described car body to move, and drive described front group of wheel and/or organize afterwards the hydraulic control system that turns to that wheel rotates with respect to the moving direction of described car body, described in turn to hydraulic control system to be specially the hydraulic control system that turns to as above.
With respect to content in background technology, vehicle that the utility model is provided for turn to hydraulic control system, comprise front group of wheel steering hydraulic control system and rear group of wheel steering hydraulic control system, this rear group of wheel steering hydraulic control system comprises fix-displacement pump, steering cylinder and is arranged in parallel the first control cock and the second control cock between Hydraulic Pump and system oil return oil circuit; Wherein, steering cylinder is used for driving rear group of wheel steering by fix-displacement pump fuel feeding, and the first control cock is by controlling the fuel feeding of steering cylinder, so that steering cylinder action or locking, the second control cock, according to the mode of operation of the first control cock, is controlled steering cylinder place oil circuit and is built pressure and off-load.
The rear group of wheel steering hydraulic control system that turns to hydraulic control system that this programme provides, the propulsion source that the fix-displacement pump of take is steering cylinder, by controlling the switching of the first control cock and the second control cock different operating position, having realized building of steering cylinder place oil circuit presses or off-load, and the action of building pressure rear steering oil cylinder, in addition, locking oil cylinder and control unit thereof in prior art have also been saved.Obviously, compared with prior art, in this programme after group turn to that the manufacturing cost of hydraulic control system obviously reduces, volume significantly reduces, thereby reduced turn to hydraulic control system whole manufacturing cost, expanded its Applicable scope.
In a preferred version of the present utility model, the first control cock is two-bit triplet change-over valve, the second control cock comprises two position and four-way reversing valves and switch valve, the first actuator port of two position and four-way reversing valves is communicated with system oil return oil circuit, its second actuator port is communicated with Hydraulic Pump, its the 3rd actuator port and the 4th actuator port are respectively used to be communicated with two epitrochoidal chambers of vehicle secondary actuator, switch valve is arranged between the 4th actuator port and vehicle secondary actuator, to control two position and four-way reversing valves and the conducting of vehicle secondary actuator or disconnection;
The first control cock is positioned at meta, and two position and four-way reversing valves and described on-off valve control fix-displacement pump processed are communicated with system oil return oil circuit or are vehicle secondary actuator fuel feeding; The first control cock switches to left position or right position, and two position and four-way reversing valves and on-off valve control fix-displacement pump processed is steering cylinder and/or vehicle secondary actuator fuel feeding.
The second control cock that this programme forms by 2/2-way change-over valve and the ingenious combination of switch valve, and making fix-displacement pump is the fuel feeding of vehicle secondary actuator by the second control cock, make steering cylinder be positioned at action and/or lockup state often drives fix-displacement pump and can be used for making effective merit for vehicle secondary actuator vehicle secondary actuator fuel feeding, so not only can make the oil circuit off-load of steering cylinder place, and avoided because of fix-displacement pump and direct connection of system oil return oil circuit caused energy consumption and fluid problem of temperature rise.In addition, can be also steering cylinder and vehicle secondary actuator fuel feeding simultaneously, thereby significantly improve the work efficiency that turns to hydraulic control power element.
In another preferred version of the present utility model, hydraulic control steering swivel system also comprises controller, the signal output part of this controller is connected with the signal receiving end of the second control cock with the first control cock, and controller sends corresponding control command according to Vehicular turn pattern to the first control cock and the second control cock.This controller comprises collecting unit and arithmetic element; Wherein, collecting unit is for obtaining respectively the actual rotational angle value with respect to vehicle heading of described front group of wheel and described rear group of wheel, arithmetic element is according to the actual rotational angle value of Vehicular turn pattern and front group of wheel, obtain the theoretical corner value of rear group of wheel, then after judgement, whether the difference of group wheel actual rotational angle value and theoretical corner value equals zero: if not, controller sends control command to the first control cock and the second control cock, so that steering cylinder action; Otherwise controller does not send control command signal, steering cylinder keeps lockup state.
In addition, the second control cock is specially apportioning valve, and controller carrys out the valve port opening of real-time resize ratio valve according to the size of actual rotational angle value and theoretical corner value, flow into steering cylinder pressure oil liquid flow control turning velocity by control.Obviously, this programme has not only improved the automatic control level of steering control system by the setting of controller, and can be according to different operating occasion and operating mode, be adjusted at after difference turns under pattern and organize wheel with respect to travel direction rotational angle, thereby can make rear group of steered wheel realize, turn at any angle.In addition, also can improve the steering stability that turns to the work efficiency of hydraulic control system and organize afterwards wheel.
Accompanying drawing explanation
Fig. 1 shows four kinds of schematic diagrams that turn to pattern that engineering truck is conventional;
Fig. 2 shows the control principle drawing of existing hydraulic control steering swivel system;
Fig. 3 shows the control principle drawing of the specific embodiment of hydraulic control steering swivel system provided by the utility model;
Fig. 4 shows the control flow chart of the steering swivel system of hydraulic control shown in Fig. 3.
Corresponding relation in Fig. 1 and Fig. 2 between Reference numeral and component names:
After group independent steering pattern, B, organizing independent steering pattern, the little turning of C before A turns to pattern, D crab row to turn to pattern, 10 ' front group gear type pump, 11 ' the first control cock groups, 12 ' front group steering cylinder, 20 ' organize afterwards controllable capacity pump, 21 ' the second control cock groups, the 22 ' three control cock group, 23 ' organize afterwards locking oil cylinder, 24 ' organize afterwards steering cylinder.
Corresponding relation in Fig. 3 between Reference numeral and component names:
20 gear type pumps, 21 steering cylinders, 22 first control cock, 23 second control cock, 23-1 two position four-way solenoid valves, 23-2 switch valve, 3 collecting units, 4 vehicle secondary actuators.
The specific embodiment
Core of the present utility model is to provide a kind of hydraulic control system that turns to for vehicle, by the control cock group of utilizing fix-displacement pump and can making often to drive fix-displacement pump off-load under steering cylinder locking-in state, reduced turn to hydraulic control system cost, expanded its Applicable scope.On this basis, the utility model also provides a kind of wheel crane that turns to hydraulic control system that comprises.
Without loss of generality, existing in conjunction with Figure of description, take and control the specific embodiment that hydraulic control steering swivel system provided by the utility model is described as example that turns to of wheel crane.Be appreciated that the hydraulic control steering swivel system in this programme also can be used for the vehicle that other employing turns to hydraulic control system.It should be noted that the utility model is only to turning to rear group of hydraulic control system to turn to hydraulic control system to be optimized design, turn to hydraulic control system to be described in background technology content to its front group, so do not repeat them here.
Refer to Fig. 3, the figure shows the control principle drawing of the specific embodiment of hydraulic control steering swivel system provided by the utility model.
As shown in Figure 3, the hydraulic control system that turns to for wheel crane that this programme provides, comprise front group of wheel steering hydraulic control system and rear group of wheel steering hydraulic control system, this rear group of wheel steering hydraulic control system comprises steering cylinder 21, gear type pump 20 and is set up in parallel the first control cock 22 and the second control cock 23 between steering cylinder 21 and gear type pump 20 and system oil return oil circuit; Wherein, gear type pump 20 is that steering cylinder 21 fuel feeding are so that it organizes wheel steering after driving, the first control cock 22 controls the fuel feeding of steering cylinder 21 so that steering cylinder 21 moves or lockings, and the second control cock 23 is controlled steering cylinder 21 place oil circuits according to the mode of operation of the first control cock 22 and built pressure or off-load.
Particularly, the first control cock 22 is specially 3-position 4-way apportioning valve, and the second control cock 23 comprises two four-way electromagnetic reversing valve 23-1 and switch valve 23-2.Wherein, the first actuator port and the system oil return oil circuit of two position four-way solenoid valve commutation 23-1 are communicated with, its second actuator port and Hydraulic Pump are communicated with, its the 3rd actuator port and the 4th actuator port are respectively used to be communicated with two epitrochoidal chambers of wheel crane vehicle secondary actuator 4, switch valve 23-2 is arranged between the 4th actuator port and vehicle secondary actuator 4 of two position four-way solenoid valve change-over valve 23-1, to control conducting and the disconnection of the 4th actuator port and vehicle secondary actuator 4.
Next continue to set forth in conjunction with Fig. 3 the above-mentioned rear group of control process that turns to hydraulic control system that this programme provides.
When wheel crane is normally at when normally travelling or only having front group of wheel to participate in turning to, the first control cock 22 valves are positioned at meta, steering cylinder 21 lockings, two four-way electromagnetic reversing valve 23-1 and switch valve 23-2 pinion pump 20 is communicated with system oil return oil circuit or for vehicle secondary actuator 4 fuel feeding, make steering cylinder 21 place oil circuit off-loads; When after wheel crane needs, group wheel participates in turning to, operate the first control cock 22 and switch to left position or right position, two four-way electromagnetic reversing valve 23-1 and switch valve 23-2 pinion pump 20 are steering cylinder 21 and/or vehicle secondary actuator 4 fuel feeding, make steering cylinder 21 place oil circuits build pressure, after steering cylinder 21 drives, organize wheel with respect to travel direction cw or rotate counterclockwise, the adjustment of rotation direction can realize by switching the left and right control position of the first control cock.
Above-mentioned rear group turns to hydraulic control system, take the propulsion source of gear type pump 20 as steering cylinder 21, by controlling the switching of the first control cock 22 and the second control cock 23 different operating positions, having realized building of steering cylinder 21 place oil circuits presses or off-load, and the action of building pressure rear steering oil cylinder 21, in addition, locking oil cylinder and control unit thereof in prior art have also been saved.Obviously, compared with prior art, in this programme after group turn to that the manufacturing cost of hydraulic control system obviously reduces, volume significantly reduces, thereby reduced turn to hydraulic control system whole manufacturing cost, expanded its Applicable scope.
Further, the second control cock 23 that this programme forms by 2/2-way change-over valve 23-1 and the ingenious combination of switch valve 23-2, and making fix-displacement pump 20 is the fuel feeding of vehicle secondary actuator 4 by the second control cock 23, while making steering cylinder 21 be positioned at lockup state, often driving fix-displacement pump 20 can be used for making effective merit for secondary actuator 4 fuel feeding, so not only can make steering cylinder 21 place oil circuit off-loads, and avoided because of fix-displacement pump 20 and direct connection of system oil return oil circuit caused energy consumption and fluid problem of temperature rise, thereby reduced the operating cost that turns to hydraulic control system.Or, can be also steering cylinder 21 and vehicle secondary actuator 4 fuel feeding simultaneously, thereby significantly improve the work efficiency that turns to hydraulic control power element.
It should be noted that, in this programme, the second control cock 23 can also single switch valve or by pass valve, equally also can solve the unloading that adopts the steering cylinder 21 place oil circuits that gear type pump 20 drives.In addition, after meet controlling on the basis of group wheel steering functional requirement, at least one also can adopt manual control mode the first control cock 22 in this programme and the second control cock 23.
In addition, in this programme, turn to hydraulic control system also to comprise controller, the signal output part of this controller is connected with the signal receiving end of the second control cock 23 with the first control cock 22, by judgement Vehicular turn pattern, to the first control cock 22 and the second control cock 23, sends corresponding control command.This controller comprises collecting unit 3 and arithmetic element, wherein, collecting unit 3 obtains respectively front group of wheel and rear group of wheel with respect to the actual rotational angle value of vehicle heading, input to again computing comparing unit and according to Vehicular turn pattern, obtain the theoretical corner value of rear group of wheel, finally after judgement, whether the group actual rotational angle value of wheel and the difference of theoretical corner value are zero, according to judged result, to the first control cock 22 and the second control cock 23, send corresponding control command.
The concrete control step of above-mentioned controller is now described in conjunction with Fig. 4, and the concrete control step of this controller comprises:
After S00, judgement, whether group wheel participates in turning to: if so, enter step S10; If not, enter step S20;
S10, obtain front group of wheel or organize afterwards the actual rotational angle value of wheel respectively, the theoretical corner value of group wheel after calculating, after judgement, whether the difference of group wheel actual rotational angle value and theoretical corner value is zero: if not, enter step S20; If so, enter step S30;
After S20, control steering cylinder 21 drive, group wheel rotates with respect to travel direction.
S30, control steering cylinder 21 keep lockup states.
It should be noted that, the difference that the rear group of independence that is participated in turning to by rear group of wheel and little turning and crab row turn to is only, rear group of wheel is with respect to the direction of rotation of vehicle heading, and the adjustment of rotation direction can realize by switching the left and right control position of the first control cock 22, those skilled in the art can realize completely by prior art, so no longer the control flow of every kind of pattern is illustrated one by one herein.In addition, collecting unit 3 in this programme is specially the angular transducer that is installed on forward and backward vehicle bridge, be appreciated that, satisfied, obtain on the basis of forward and backward group of wheel with respect to the rotational angle function of vehicle heading other devices that the collecting unit 3 in this programme also can adopt those skilled in the art to habitually practise.
Obviously, by the setting of controller, not only improved the automatic control level of steering control system, and can be adjusted at after difference turns under pattern and organize wheel with respect to travel direction rotational angle according to different operating occasion and operating mode, thereby can make rear group of steered wheel realize, turn at any angle.
Further, as previously mentioned, the first control cock 22 in this programme is specially 3-position 4-way apportioning valve, and implementation step S10, i.e. step S20 and S10 formation closed loop control in real time in cylinder action process in step S20.By the difference of rear group of wheel actual rotational angle value and theoretical corner value, change to adjust the valve port opening of 3-position 4-way apportioning valve, by control, flow into steering cylinder 21 pressure oil liquid flows and control turning velocity, thereby can improve the steering stability that turns to the work efficiency of hydraulic control system and organize afterwards wheel.
After concrete in this programme, the variable quantity of group wheel actual rotational angle value and the difference of theoretical corner value and the valve port opening of 3-position 4-way apportioning valve is directly proportional, and the piston rod of steering cylinder 21 is made decelerated movement.Certainly, meeting on the basis of adjusting turning velocity function, the variable quantity of rear group of wheel actual rotational angle value in this programme and the difference of theoretical corner value and the valve port opening of 3-position 4-way apportioning valve is inversely proportional to, or other functional relations.
In addition, it should be noted that, in step S30, also can comprise and judge whether to need 4 work of vehicle secondary actuator: if so, enter step S31; If not, enter step S32;
S31, control vehicle secondary actuator 4 place oil circuits are built pressure;
S32, the 4 place oil circuit off-loads of control vehicle secondary actuator.
It is emphasized that in this programme, fix-displacement pump is specially gear type pump, on the basis meeting for steering cylinder oil supply function, this programme also can adopt the fix-displacement pump such as plunger pump or blade-type pump certainly.
Except above-mentioned, turn to hydraulic control system, a kind of wheel crane that the utility model also provides, this wheel crane comprises car body, the front group of wheel and the rear group of wheel that drive car body to move, and before driving group wheel and/or after organize wheel with respect to the counter-rotational hydraulic control system that turns to of Vehicle Driving Cycle, this turns to hydraulic control system to be specially the hydraulic control system that turns to as above.The internal functional elements and the principle of work that are appreciated that this wheel crane of formation are same as the prior art, and those skilled in the art can realize completely based on prior art, so repeat no more herein.
The foregoing is only preferred implementation of the present utility model, do not form the restriction to the utility model protection domain.Any any modification of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present utility model.
Claims (8)
- Turn to a hydraulic control system, comprise front group of wheel steering hydraulic control system and rear group of wheel steering hydraulic control system, described rear group of wheel steering hydraulic control system comprises:Steering cylinder (21), for driving rear group of wheel steering, is characterized in that, also comprises:Fix-displacement pump (20), with to described steering cylinder (21) fuel feeding;The first control cock (22), be arranged between described steering cylinder (21) and described fix-displacement pump (20) and system oil return oil circuit, by controlling the fuel feeding of described steering cylinder (21), so that described steering cylinder (21) action or locking;The second control cock (23), is arranged in parallel with described the first control cock (22), according to the mode of operation of described the first control cock (22), controls described steering cylinder (21) place oil circuit and builds pressure or off-load.
- 2. the hydraulic control system that turns to according to claim 1, it is characterized in that, described the first control cock (22) is two-bit triplet change-over valve, and be configured to: described the first control cock (22) is positioned at meta, described the second control cock (23) is controlled described steering cylinder (21) place oil circuit off-load; Described the first control cock (22) switches to left position or right position, and described the second control cock (23) is controlled described steering cylinder (21) place oil circuit and built pressure.
- 3. the hydraulic control system that turns to according to claim 2, it is characterized in that, described second direction control cock (23) comprises two position and four-way reversing valves (23-1) and switch valve (23-2), the first actuator port of described two position and four-way reversing valves (23-1) is communicated with described system oil return oil circuit, its second actuator port is communicated with described fix-displacement pump (20), its the 3rd actuator port and the 4th actuator port are respectively used to be communicated with two epitrochoidal chambers of vehicle secondary actuator (4), described switch valve (23-2) is arranged at the arbitrary branch road between described two position and four-way reversing valves (23-1) and described vehicle secondary actuator (4), to control described two position and four-way reversing valves (23-1) and described vehicle secondary actuator (4) conducting or disconnection,Described the first control cock (22) is positioned at meta, and described two position and four-way reversing valves (23-1) and described switch valve (23-2) are controlled that described fix-displacement pump (20) is communicated with described system oil return oil circuit or be described vehicle secondary actuator (4) fuel feeding; Described the first control cock (22) switches to left position or right position, and it is described steering cylinder (21) and/or described vehicle secondary actuator (4) fuel feeding that described two position and four-way reversing valves (23-1) and described switch valve (23-2) are controlled described fix-displacement pump.
- 4. according to the hydraulic control system that turns to described in any one in claims 1 to 3, it is characterized in that, also comprise controller, the signal output part of described controller is connected with the signal receiving end of described the second control cock (23) with described the first control cock (22); Described controller sends corresponding control command according to Vehicular turn pattern to described the first control cock (22) and described the second control cock (23).
- 5. the hydraulic control system that turns to according to claim 4, is characterized in that, described controller also comprises:Collecting unit (3), to obtain respectively described front group of wheel and described rear group of wheel with respect to the actual rotational angle value of vehicle heading;Arithmetic element, by the actual rotational angle value of Vehicular turn pattern and described front group of wheel, obtains the corresponding theory corner value of described rear group of wheel.
- 6. the hydraulic control system that turns to according to claim 5, it is characterized in that, described the first control cock (22) is apportioning valve, and described controller is adjusted the valve port opening of described the first control cock (22) according to the difference of the actual rotational angle value of described rear group of wheel and theoretical corner value.
- 7. the hydraulic control system that turns to according to claim 6, is characterized in that, described collecting unit (3) is angular transducer.
- 8. a wheel crane, the front group of wheel and the rear group of wheel that comprise car body, drive described car body to move, and drive described front group of wheel and/or organize afterwards the hydraulic control system that turns to that wheel rotates with respect to the moving direction of described car body, it is characterized in that, described in turn to hydraulic control system to be specially the hydraulic control system that turns to as described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320538078.XU CN203427872U (en) | 2013-08-30 | 2013-08-30 | Wheeled crane and steering hydraulic control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538078.XU CN203427872U (en) | 2013-08-30 | 2013-08-30 | Wheeled crane and steering hydraulic control system thereof |
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| CN203427872U true CN203427872U (en) | 2014-02-12 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103407488A (en) * | 2013-08-30 | 2013-11-27 | 徐州重型机械有限公司 | Wheel type crane and steering hydraulic control system thereof |
| CN104176118A (en) * | 2014-08-15 | 2014-12-03 | 徐州重型机械有限公司 | Automobile crane and cylinder-controlled steering system thereof |
| CN104709344A (en) * | 2014-11-28 | 2015-06-17 | 江门市兴江转向器有限公司 | Semi-integral type hydraulic power-assisted multi-axle steering system and control method thereof |
| CN105329311A (en) * | 2015-11-16 | 2016-02-17 | 江西科技学院 | Hydraulic steering system for engineering vehicle |
| CN106741152A (en) * | 2015-11-24 | 2017-05-31 | 中联重科股份有限公司 | Sweeping machine steering system, sweeping machine and sweeping machine steering control method and device |
| CN108045432A (en) * | 2018-01-16 | 2018-05-18 | 徐工集团工程机械有限公司 | Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle |
| CN109083661A (en) * | 2018-09-19 | 2018-12-25 | 中国铁建重工集团有限公司 | A kind of steering system and method for concrete spraying trolley |
| CN111619662A (en) * | 2019-04-22 | 2020-09-04 | 中国北方车辆研究所 | Front and rear axle reverse steering method of 4X4 electromechanical hydraulic all-wheel steering system |
| CN111619648A (en) * | 2019-04-22 | 2020-09-04 | 中国北方车辆研究所 | Steering wheel, steering gear assembly and steering system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407488A (en) * | 2013-08-30 | 2013-11-27 | 徐州重型机械有限公司 | Wheel type crane and steering hydraulic control system thereof |
| CN104176118A (en) * | 2014-08-15 | 2014-12-03 | 徐州重型机械有限公司 | Automobile crane and cylinder-controlled steering system thereof |
| CN104709344A (en) * | 2014-11-28 | 2015-06-17 | 江门市兴江转向器有限公司 | Semi-integral type hydraulic power-assisted multi-axle steering system and control method thereof |
| CN104709344B (en) * | 2014-11-28 | 2017-04-12 | 徐州重型机械有限公司 | Semi-integral type hydraulic power-assisted multi-axle steering system and control method thereof |
| CN105329311A (en) * | 2015-11-16 | 2016-02-17 | 江西科技学院 | Hydraulic steering system for engineering vehicle |
| CN106741152B (en) * | 2015-11-24 | 2019-07-02 | 长沙中联重科环境产业有限公司 | Sweeping machine steering system, sweeping machine and sweeping machine rotating direction control method and device |
| CN106741152A (en) * | 2015-11-24 | 2017-05-31 | 中联重科股份有限公司 | Sweeping machine steering system, sweeping machine and sweeping machine steering control method and device |
| CN108045432A (en) * | 2018-01-16 | 2018-05-18 | 徐工集团工程机械有限公司 | Steering cylinder, hydraulic power-assist steering system turn to vehicle bridge and vehicle |
| CN108045432B (en) * | 2018-01-16 | 2023-08-25 | 江苏徐工国重实验室科技有限公司 | Steering cylinder, hydraulic power steering system, steering axle and vehicle |
| CN109083661A (en) * | 2018-09-19 | 2018-12-25 | 中国铁建重工集团有限公司 | A kind of steering system and method for concrete spraying trolley |
| CN111619662A (en) * | 2019-04-22 | 2020-09-04 | 中国北方车辆研究所 | Front and rear axle reverse steering method of 4X4 electromechanical hydraulic all-wheel steering system |
| CN111619648A (en) * | 2019-04-22 | 2020-09-04 | 中国北方车辆研究所 | Steering wheel, steering gear assembly and steering system |
| CN111619662B (en) * | 2019-04-22 | 2021-06-22 | 中国北方车辆研究所 | Front and rear axle reverse steering method of 4X4 electromechanical hydraulic all-wheel steering system |
| CN111619648B (en) * | 2019-04-22 | 2021-07-06 | 中国北方车辆研究所 | Steering wheel, steering gear assembly and steering system |
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