CN107061387B - A kind of hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method - Google Patents
A kind of hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method Download PDFInfo
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- CN107061387B CN107061387B CN201710204346.7A CN201710204346A CN107061387B CN 107061387 B CN107061387 B CN 107061387B CN 201710204346 A CN201710204346 A CN 201710204346A CN 107061387 B CN107061387 B CN 107061387B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Abstract
The present invention provides a kind of hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method, the hilly and mountainous land tractor steering synchronization hydraulic system is made of fuel feeding component, all-hydraulic steering gear, two-position three way to valve I, front steering hydraulic cylinder, two-position four-way solenoid directional control valve, rear steering hydraulic cylinder, gear distributor, two position, three-way electromagnetic change valve and two-position three-way hand change valve II manually；Wherein, gear distributor can according to the required flow of hydraulic cylinder before and after the different proportional assignments at front-and rear-wheel steer angle, so as to make front and back wheel realize turn to it is synchronous with return it is positive synchronous；The control method of the hilly and mountainous land tractor steering synchronization hydraulic system can realize front-wheel steer, rear-axle steering and four-wheel steering control；Compared with prior art, technical solution of the present invention can realize that front-and rear-wheel steer synchronization is positive synchronous with returning in the case of tractor front-and rear-wheel steer angle requirement difference.
Description
Technical field
The invention belongs to agricultural machinery hydraulic system technical field, suitable for hilly and mountainous land tractor, and in particular to a kind of
Hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method.
Background technology
In recent years, due to the fast development of China's economy, agriculture development is more and more important, and tractor etc. is a series of
The use of agricultural machinery generalization, especially in the especially complex area of the landform such as mountainous region and hills, the work to tractor
Intensity and performance requirement higher, therefore a high-performance is worked out, suitable for the baby tractor pair of China's hilly and mountainous land farming
It pushes very crucial for the development of China's intelligent agriculture.
Steering is a very important part in vehicle, and steering can change and restore the advance side of vehicle
To, when straight line traveling cause to deviate its direction of advance for some reason when, can also vehicle be corrected by steering
Direction of advance.Therefore, the performance quality of tractor steering system directly affects working efficiency and the safety of tractor
Energy.
It is all hydraulic pressure steering-gear that the tractor in China is most commonly used at present, and all hydraulic pressure steering-gear has simple in structure
The advantages that with occupying little space, steering mode use front-wheel steer technology.But front-wheel steer turning radius is big, compares in topography
Complicated hilly and mountainous land area is unfavorable for tractor work.Four-wheel steering technology can reduce turning radius, make handling maneuver clever
It is living.In the existing four-wheel steering vehicle using all hydraulic pressure steering-gear in China, the steering mechanism of front and back wheel is identical, front and back wheel
Steering angle it is identical, the stroke of front and rear hydraulic cylinder is also identical.When encountering, front and back wheel wheelspan is identical, but front and back wheel size
Different, front-rear axle steering mechanism can use the steering angle requirement difference of the front and back wheel caused by installation space difference, front and rear hydraulic pressure
During the different situation of cylinder stroke, existing all hydraulic pressure steering-gear can not solve front-and rear-wheel steer and synchronize to ask with time just synchronous
Topic.
Patent CN201405924Y discloses a kind of front and back wheel synchronous steering mechanism, in technical solution described in the patent,
When vehicle is turned to, front-wheel can be made to generate steering angle equal in magnitude, direction is opposite with trailing wheel, subtract turning radius
It is small, turn to the advantages that flexible.
Although the technology of above-mentioned patent can enhance the flexible performance of steering, vehicle can only be realized when turning to, it is front and rear
Wheel is synchronous to generate steering angle equal in magnitude, direction is opposite, and do not solve a critical problem：When encountering front and back wheel wheelspan phase
Together, during the situation that the steering angle requirement of front and back wheel is different, front and rear hydraulic cylinder travel is different, existing all hydraulic pressure steering-gear is simultaneously
Synchronization that the steering can not be achieved is positive synchronous with returning.
Invention content
The present invention be directed to deficiency of the prior art, it is proposed that a kind of hilly and mountainous land tractor steering synchronization hydraulic system and
Rotating direction control method, the present invention in the case of front-and rear-wheel steer angle requirement difference, can realize front-and rear-wheel steer synchronize with
It returns positive synchronous.With reference to Figure of description, technical scheme is as follows：
A kind of hilly and mountainous land tractor steering synchronization hydraulic system, the hydraulic system is by fuel feeding component, hydro-steering
Device 6, two-position three way are manually to valve I 7, front steering hydraulic cylinder 8, two-position four-way solenoid directional control valve 9, rear steering hydraulic cylinder 12, gear
Distributor 14, two position, three-way electromagnetic change valve 15 and two-position three-way hand change valve II 17 form；
Fuel tank 1 is connect with the P mouths of all-hydraulic steering gear 6, A mouths and the two-position three-way hand change valve I of all-hydraulic steering gear 6
One end P mouthfuls of 7 is connected, and the other end of two-position three-way hand change valve I 7 has A mouthfuls and B mouthfuls of hydraulic fluid port, two-position three-way hand change valve I
7 A mouths are connected with the C mouths of front steering hydraulic cylinder 8, the B mouths of two-position three-way hand change valve I 7 and the F mouths of rear steering hydraulic cylinder 12
It is connected；
The D mouths of front steering hydraulic cylinder 8 are connect for 15 one end B mouthfuls with two position, three-way electromagnetic change valve, in front steering hydraulic cylinder 8
At the D mouths of C mouthfuls and front steering hydraulic cylinder 8 it is each it is in parallel all the way respectively with one end A mouthful of two-position four-way solenoid directional control valve 9 and B mouthfuls company
It connects, P mouthfuls of the other end of two-position four-way solenoid directional control valve 9 is connected with 14 left side of gear distributor, two-position four-way solenoid directional control valve 9
O mouthfuls are connected with the E mouths of rear steering hydraulic cylinder 12, the F mouths right side with gear distributor 14 all the way in parallel of rear steering hydraulic cylinder 12
It is connected, the E mouths of rear steering hydraulic cylinder 12 are in parallel to be connect all the way with one end B mouthfuls of two-position three-way hand change valve II 17, herein
The required flow of hydraulic cylinder before and after gear distributor 14 can be divided in portion according to the difference at front-and rear-wheel steer angle, so as to make
Front and back wheel realize turn to it is synchronous with return it is positive synchronous；
One end A mouthfuls of the oil outlet connection two position, three-way electromagnetic change valve 15 of gear distributor 14, two-position three-way electromagnetic changes
It is connect to P mouthfuls of the other end of valve 15 with one end A mouthfuls of two-position three-way hand change valve II 17, two-position three-way hand change valve II 17
P mouthfuls of the other end connect with the B mouths of all-hydraulic steering gear 6,
The T mouths of the all-hydraulic steering gear 6 take back fuel tank 1, and throttling is equipped on oil return line by oil return line
Valve.
A kind of hilly and mountainous land tractor steering synchronization hydraulic system, wherein, one group of liquid is further included in the hydraulic system
Pressure lock 11, the hydraulic lock is made of four hydraulic control one-way valves 10；First hydraulic control one-way valve is connected on two-position three way and changes manually
On the connecting line of 12F mouthfuls of valve I 7 and rear steering hydraulic cylinder；Second hydraulic control one-way valve is connected on two-position four-way electromagnetic switch
On the connecting line of 12E mouthfuls of 9O mouthfuls of valve and rear steering hydraulic cylinder；Third hydraulic control one-way valve is connected on 12F mouthfuls of rear steering hydraulic cylinder
With on the connecting line on the right side of gear distributor 14；4th hydraulic control one-way valve is connected on 12E mouthfuls and two of rear steering hydraulic cylinder
On the connecting line that II 17B mouthfuls of threeway hand-operated direction valve；When not needing to the work of rear steering hydraulic cylinder 12, hydraulic lock 11 can incite somebody to action
Rear steering hydraulic cylinder 12 locks, and improves the security performance of tractor.
A kind of hilly and mountainous land tractor steering synchronization hydraulic system, wherein, the fuel feeding component by fuel tank 1, constant flow pump 2,
Pressure measuring tie-in 3, pressure gauge PTB series pressure measuring unit 4, PLF Series Pressures in-line filter 5 and oil-suction oil filter 22 form；Oil
Case 1 is connected by oil pipe with constant flow pump 2, and oil-suction oil filter 22 is connected on fuel tank 1 on the connecting line of constant flow pump 2, being used for
Impurity in oil strain liquid；Constant flow pump 2 is connected together with PLF Series Pressures in-line filter 5 by oil pipe；3 He of pressure measuring tie-in
Pressure gauge PTB series pressure measuring unit 4 is connected in parallel on the exit of constant flow pump 2, for the pressure of measuring system；PLF Series Pressure pipes
Pipe filter 5 is connect through oil pipe with the P mouths of all-hydraulic steering gear 6；
A kind of hilly and mountainous land tractor steering synchronization hydraulic system, wherein, the throttle valve on oil return line is MG
Type throttle valve 19, MG types throttle valve 19 take back fuel tank 1 by oil pipe, meanwhile, it is equipped at fuel tank 1 for filtering air plankton
Hydraulic air filter 20 and liquid level liquid thermometer 21 for measuring oil level and temperature in fuel tank 1.
A kind of rotating direction control method of hilly and mountainous land tractor steering synchronization hydraulic system, the rotating direction control method include
Front-wheel steer control process, rear-axle steering control process and four-wheel steering control process；Aspect disk rotates counterclockwise, all-hydraulic
The P mouths of steering gear 6 are connected with A mouthfuls, and T mouthfuls are connected with B mouthfuls；When aspect disk rotates clockwise, the P mouths of all-hydraulic steering gear 6 and B mouthfuls
It is connected, T mouthfuls are connected with A mouthfuls；
During front-wheel steer control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during,
Each valve state all same of hydraulic system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three way changes manually
It is connected to the P mouths of valve I 7 with A mouthfuls, fluid is before the A mouths of all-hydraulic steering gear 6 are out flowed to through two-position three-way hand change valve I 7
Hydraulic steering cylinder 8；The P mouths of two position, three-way electromagnetic change valve 15 are connected with B mouthfuls, and the D hydraulic fluid ports of fluid from preceding hydraulic steering cylinder 8 come out
Two-position three-way hand change valve II 17 is flowed to through two position, three-way electromagnetic change valve 15；The P mouths of two-position three-way hand change valve II 17
It is connected with A mouthfuls, fluid out flows back to full liquid from the P mouths of two position, three-way electromagnetic change valve 15 through two-position three-way hand change valve II 17
Press the B mouths of steering gear 6；The oil circuit of two-position four-way solenoid directional control valve 9 is closed；
During rear-axle steering control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during,
Each valve state all same of hydraulic system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three way changes manually
It is connected to the P mouths of valve I 7 with B mouthfuls, fluid is come out from the A mouths of all-hydraulic steering gear 6 after the flow direction of two-position three-way hand change valve I 7
The F mouths of hydraulic steering cylinder 12；The P mouths of two-position three-way hand change valve II 17 are connected with B mouthfuls, and fluid is from rear steering hydraulic cylinder 12
The E mouthfuls of B mouths that all-hydraulic steering gear 6 is out flowed back to through two-position three-way hand change valve II 17；The P of two position, three-way electromagnetic change valve 15
Mouth is connected with B mouthfuls, and fluid does not circulate；The oil circuit of two-position four-way solenoid directional control valve 9 is closed；
During four-wheel steering control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during,
Each valve state all same of hydraulic system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three way changes manually
It is connected to the P mouths of valve I 7 with A mouthfuls, the P mouths of two-position four-way solenoid directional control valve 9 are connected with B mouthfuls, the O of two-position four-way solenoid directional control valve 9
Mouth is connected with A mouthfuls, and fluid is come out from the A mouths of all-hydraulic steering gear 6 after two-position three-way hand change valve I 7, flows to forward all the way
To the C mouths of hydraulic cylinder 8, another way flows to the E mouths of rear steering hydraulic cylinder 12 through two-position four-way solenoid directional control valve 9；Two-position three way electricity
The P mouths of magnetic reversal valve 15 are connected with A mouthfuls, and the P mouths of two-position three-way hand change valve II 17 are connected with A mouthfuls, and fluid is distributed from gear
Device 14 comes out the B mouths that all-hydraulic steering gear 6 is flowed back to through two position, three-way electromagnetic change valve 15, two-position three-way hand change valve II 17；
Gear distributor 14 can be according to the different proportional assignment front steering hydraulic cylinders 8 and rear steering hydraulic cylinder 12 at front-and rear-wheel steer angle
Required flow, so as to make front and back wheel realize turn to it is synchronous with return it is positive synchronous.
Compared with prior art the beneficial effects of the invention are as follows：
1. the steering synchronization hydraulic system designed by the present invention requires different, i.e., front and rear hydraulic cylinder at front-and rear-wheel steer angle
Stroke difference when, using gear distributor can realize front-and rear-wheel steer synchronize with return just it is synchronous.Gear distributor being capable of root
Flow is divided in portion to it to the different requirements of flow according to front and rear hydraulic steering cylinder, so as to fulfill synchronous function.
2. in the steering synchronization hydraulic system designed by the present invention, in rear steering hydraulic cylinder import and export dress, there are four hydraulic controls
Check valve forms hydraulic lock.Since hilly and mountainous land tractor working environment is poor, when carrying out operation in hillside fields, hydraulic cylinder holds very much
Easily there is situation about moving, so as to deflect wheel, tractor work is dangerous, and the hydraulic lock in the present invention can not need to liquid
Cylinder pressure is locked when working, and improves the working efficiency and security performance of tractor.
3. in the steering synchronization hydraulic system designed by the present invention, when using four-wheel steering, gear distributor exit
Overflow valve be used for eliminating accumulated error each time, when front and rear hydraulic cylinder starts to stretch out simultaneously, due to hydraulic cylinder before and after error
Be difficult to reach simultaneously, once first reach there are one hydraulic steering cylinder, at this time the overflow valve at circuit outlet start overflow make it is another
A hydraulic steering cylinder works on, until two hydraulic steering cylinders are all fully extended.When hydraulic steering cylinder returns, gear point
Orchestration starts to invert, and overflow valve eliminates air pocket as Fill valve at this time.
4. in the steering synchronization hydraulic system designed by the present invention, between all-hydraulic steering gear and front and rear hydraulic steering cylinder
One two position three way directional control valve of each installation respectively, can switch steering mode, while two three by adjusting the two reversal valves
Logical reversal valve chooses hand-operated direction valve, when tractor in steering procedure if circuit break down, can be by adjusting manually
The two hand-operated direction valves are saved, front and rear hydraulic cylinder is made to return to middle position, tractor completes turning function.
5. in the steering synchronization hydraulic system designed by the present invention, two two-position three-way hand change valves are made into a collection
It is blocking, it is easy to operate, saves installation space.
6. in the steering synchronization hydraulic system designed by the present invention, pressure gauge PTB series pressure measuring unit is selected to measure hydraulic pressure
System pressure, traditional hydraulic system must install pressure gauge and pressure meter switch at each pressure spot, and pressure gauge PTB is serial
Pressure measuring unit only needs to install pressure measuring tie-in in each pressure tap, has advanced structure, small volume, easy to use, service life
The advantages that long.
7. in the steering synchronization hydraulic system designed by the present invention, select PLF Series Pressure in-line filters, such filtering
Device has by-passing valve and differential pressure signaling device, when blocking occurs in filter core and inlet outlet pressure differential reaches sender setting value, sends out at this time
News device sends out signal, replaces filter core, has compact-sized, simple to install, reliability height using PLF Series Pressures in-line filter
The characteristics of.
Description of the drawings
Fig. 1 is a kind of composition structure diagram of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention；
Fig. 2 is liquid when front-wheel is turned left in a kind of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention
Press system schematic；
Fig. 3 is liquid when trailing wheel is turned left in a kind of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention
Press system schematic；
Fig. 4 is in a kind of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention, when four-wheel steering is turned left
Hydraulic schematic；
Fig. 5 is in a kind of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention, and reversal valve is in initial bit
Schematic diagram is put, wherein：
Fig. 5 a are the initial position schematic diagram of two-position four-way solenoid directional control valve；
Fig. 5 b are the initial position schematic diagram of two position, three-way electromagnetic change valve；
Fig. 5 c are the initial position schematic diagram of two-position three-way hand change valve I and two-position three-way hand change valve II；
Fig. 6 is in a kind of hilly and mountainous land tractor steering synchronization hydraulic system of the present invention, and reversal valve is in act bit
Schematic diagram is put, wherein：
Fig. 6 a are the operating position schematic diagram of two-position four-way solenoid directional control valve；
Fig. 6 b are the operating position schematic diagram of two position, three-way electromagnetic change valve；
Fig. 6 c are the operating position schematic diagram of two-position three-way hand change valve I and two-position three-way hand change valve II；
In figure：
1. fuel tank, 2. constant flow pumps, 3. pressure measuring tie-ins,
4. pressure gauge PTB series pressure measuring units, 5.PLF Series Pressure in-line filters, 6. all-hydraulic steering gears,
7. two-position three-way hand change valve I, 8. front steering hydraulic cylinders, 9. two-position four-way solenoid directional control valves,
10. hydraulic control one-way valve, 11. hydraulic locks, 12. rear steering hydraulic cylinders,
13.DBG type overflow valves, 14. gear distributors, 15. two position, three-way electromagnetic change valves,
16. two position, three-way electromagnetic change valve mounting base, 17. two-position three-way hand change valves II, 18. integrated packages,
19.MG type throttle valves, 20. hydraulic air filters, 21. liquid level liquid thermometers,
22. oil-suction oil filter.
Specific embodiment
For the technical solution that the present invention is further explained, with reference to Figure of description, specific embodiment of the invention is as follows：
The present invention provides a kind of hilly and mountainous land tractor steering synchronization hydraulic systems, which can
It realizes：Three kinds of front-wheel steer, rear-axle steering and four-wheel steering steering modes.When switching steering mode, front and rear hydraulic cylinder is necessary
Returning to middle position just allows to switch.The steering synchronization hydraulic system mainly consists of：Fuel tank 1, constant flow pump 2, pressure measuring tie-in
3rd, pressure gauge PTB series pressure measuring unit 4, PLF Series Pressures in-line filter 5, all-hydraulic steering gear 6, two-position three way manually to
Valve I 7, front steering hydraulic cylinder 8, two-position four-way solenoid directional control valve 9, hydraulic control one-way valve 10, rear steering hydraulic cylinder 12, DBG type overflows
Valve body 13, gear distributor 14, two position, three-way electromagnetic change valve 15, two-position three-way hand change valve II 17, MG types throttle valve 19,
Hydraulic air filter 20, liquid level liquid thermometer 21 and oil-suction oil filter 22.Specific connection mode is as described below：
As shown in Figure 1, shown in Figure 5, the present invention discloses a kind of hilly and mountainous land tractor steering synchronization hydraulic system, and fuel tank 1 passes through
Oil pipe is connected with constant flow pump 2, and an oil-suction oil filter 22 of connecting on the pipeline being connect in fuel tank 1 with constant flow pump 2 was used for oil strain
Impurity in liquid；Constant flow pump 2 is connected together with PLF Series Pressures in-line filter 5 by oil pipe, while in constant flow pump 2
Exit one pressure measuring tie-in 3 of parallel connection and pressure gauge PTB series pressure measuring unit 4, for the pressure of measuring system；PLF series pressures
Solenoid pipe filter 5 is connect through oil pipe with all-hydraulic steering gear 6, the oil pipe and two-position three way that the A mouths of all-hydraulic steering gear 6 come out
One end P mouthfuls of hand-operated direction valve I 7 is connected, and there are two hydraulic fluid port A and B, two-position three ways for the other end of two-position three-way hand change valve I 7
The A mouths of hand-operated direction valve I 7 are connected through oil pipe with the C mouths of front steering hydraulic cylinder 8, and the B mouths of two-position three-way hand change valve I 7 are through oil
Pipe is connected with the F mouths of rear steering hydraulic cylinder 12；Simultaneously in the connection of two-position three-way hand change valve I 7 and rear steering hydraulic cylinder 12
A hydraulic control one-way valve 10 is connected on pipeline to control the direction of fluid.The D mouths of front steering hydraulic cylinder 8 are changed with two-position three-way electromagnetic
One end B mouthfuls of connection to valve 15, each oil pipe all the way in parallel at the C mouths of front steering hydraulic cylinder 8 and the D mouths of front steering hydraulic cylinder 8
It is connected on one end A mouthfuls of two-position four-way solenoid directional control valve 9 and B mouthfuls respectively, P mouthfuls of the other end of two-position four-way solenoid directional control valve 9 and tooth
It takes turns 14 left side of distributor to be connected, the O mouths of two-position four-way solenoid directional control valve 9 pass through a hydraulic control one-way valve 10 and rear steering hydraulic cylinder
12 E mouths are connected, and F mouths of rear steering hydraulic cylinder 12 is in parallel all the way and to pass through a hydraulic control one-way valve 10 and gear distributor 14
Right side is connected, and the E mouths of rear steering hydraulic cylinder 12 are in parallel all the way and to pass through a hydraulic control one-way valve 10 and two-position three way manual reverse of direction
One end B mouthfuls of valve II 17 connection, gear distributor 14 herein can be before the different proportional assignments according to front-and rear-wheel steer angle
The required flow of hydraulic cylinder afterwards, so as to make front and back wheel realize turn to it is synchronous with return it is positive synchronous；Rear steering hydraulic cylinder 12 is into fuel-displaced
Four hydraulic control one-way valves 10 connected on mouth pipeline form hydraulic lock 11, when not needing to the work of rear steering hydraulic cylinder 12, hydraulic pressure
Lock 11 can lock rear steering hydraulic cylinder 12, improve the security performance of tractor.Gear distributor 14 is connected to two through oil pipe
One end A mouthfuls of position three-way solenoid valve 15, P mouthfuls of the other end of two position, three-way electromagnetic change valve 15 and two-position three way manual reverse of direction
One end A mouthfuls of valve II 17 is connected with oil pipe, and P mouthfuls of the other end of two-position three-way hand change valve II 17 passes through oil pipe and all-hydraulic turn
Connect to the B mouths of device 6, wherein, two-position three-way hand change valve I 7 is used as front-wheel steer with two-position three-way hand change valve II 17
Switching between rear-axle steering, and two-position three-way hand change valve I 7 forms a collection with two-position three-way hand change valve II 17
Blocking 18, it is easy to operate, save installation space；Before two-position four-way solenoid directional control valve 9 is used as with two position, three-way electromagnetic change valve 15
It rotates to the switching between four-wheel steering and between rear-axle steering and four-wheel steering.The T mouths warp of the all-hydraulic steering gear 6
Oil pipe is connected with MG types throttle valve 19, and MG types throttle valve 19 takes back fuel tank 1 by oil pipe, meanwhile, it is empty that hydraulic pressure is installed at fuel tank 1
Air cleaner 20 and liquid level liquid thermometer 21, wherein, hydraulic air filter 20 is used for filtering the air of sucking and new addition fluid
In impurity；Liquid level liquid thermometer 21 is used for measuring the oil level and temperature in fuel tank 1, so as to form a complete hydraulic circuit.
When tractor does not turn to, the P mouths of all-hydraulic steering gear 6 are connected with T mouthfuls, and fluid is flowed out from fuel tank 1, successively by oil suction oil strain
Device 22, constant flow pump 2, PLF Series Pressures in-line filter 5 flow into the P mouths of all-hydraulic steering gear 6, the T through all-hydraulic steering gear 6
Mouth outflow, fuel tank 1 is flowed back to by MG types throttle valve 19.
With reference to above-mentioned steering synchronization hydraulic system, invention additionally provides hilly and mountainous land tractor steering control method, including：
Three kinds of front-wheel steer, rear-axle steering and four-wheel steering steering modes.Aspect disk rotates counterclockwise, the P mouths of all-hydraulic steering gear 6 and
A mouthfuls are connected, and T mouthfuls are connected with B mouthfuls；When aspect disk rotates clockwise, the P mouths of all-hydraulic steering gear 6 are connected with B mouthfuls, T mouthfuls and A mouthfuls
It is connected.Three kinds of steering modes are specifically discussed respectively below：
First, front-wheel steer：
As shown in Fig. 2, Fig. 5, Fig. 6, when steering mode select front-wheel steer when, including two-position three-way hand change valve I 7,
All including two-position three-way hand change valve II 17, two-position four-way solenoid directional control valve 9 and two position, three-way electromagnetic change valve 15 change
Initial position is in valve, oil pipe connects with the initial position (one end for carrying spring) of all reversal valves at this time, i.e., two
The P mouths of threeway hand-operated direction valve I 7 are connected with A mouthfuls, and fluid is come out from the A mouths of all-hydraulic steering gear 6 through two-position three way manual reverse of direction
Valve I 7 flows to front steering hydraulic cylinder 8；The P mouths of two position, three-way electromagnetic change valve 15 are connected with B mouthfuls, and fluid is from preceding hydraulic steering cylinder 8
D hydraulic fluid ports out through two position, three-way electromagnetic change valve 15 flow to two-position three-way hand change valve II 17；Two-position three way manual reverse of direction
The P mouths of valve II 17 are connected with A mouthfuls, and fluid is come out from the P mouths of two position, three-way electromagnetic change valve 15 through two-position three-way hand change valve
II 17 flow back to the B mouths of all-hydraulic steering gear 6；The oil circuit of two-position four-way solenoid directional control valve 9 is closed, and fluid does not circulate.
When being rotated clockwise or counter-clockwise due to steering wheel, the operation principle of all-hydraulic steering gear 6 is identical, this sentences the steering wheel inverse time
For the operation principle of needle rotation, the four-wheel steering synchronization hydraulic system acquiescence steering mode designed by the present invention is preceding rotation
To front-wheel steer synchronization hydraulic system operation principle is as described below：
Fluid is flowed out from fuel tank 1, is flowed by oil-suction oil filter 22, constant flow pump 2, PLF Series Pressures in-line filter 5
The P mouths of all-hydraulic steering gear 6, at this time since the P mouths of all-hydraulic steering gear 6 are connected with A mouthfuls, fluid is from the A of all-hydraulic steering gear 6
Mouth outflow by two-position three-way hand change valve I 7, flows to the C mouths of front steering hydraulic cylinder 8, pushes the work of front steering hydraulic cylinder 8
Stopper rod moves right, the D mouths outflow of the premenstrual hydraulic steering cylinder 8 of fluid, using two position, three-way electromagnetic change valve 15, two-position three way
Hand-operated direction valve II 17 flows back to the B mouths of all-hydraulic steering gear 6, and the B mouths of all-hydraulic steering gear 6 are connected with T mouthfuls at this time, and fluid passes through
The T mouths outflow of all-hydraulic steering gear 6, fuel tank 1 is flowed back to by MG types throttle valve 19.
2nd, rear-axle steering：
As shown in Fig. 3, Fig. 5, Fig. 6, when steering mode selects rear-axle steering, I 7 He of two-position three-way hand change valve is adjusted
Two-position three-way hand change valve II 17 makes its action, and other reversal valves are in initial position, at this time oil pipe and two-position three way hand
The operating position of dynamic reversal valve 7 and two-position three-way hand change valve 17 (one end for carrying handle) connects, with two-position four-way electromagnetism
The initial position of reversal valve 9 and two position, three-way electromagnetic change valve 15 (one end for carrying spring) connects, i.e., two-position three way changes manually
It is connected to the P mouths of valve I 7 with B mouthfuls, fluid is come out from the A mouths of all-hydraulic steering gear 6 after the flow direction of two-position three-way hand change valve I 7
The F mouths of hydraulic steering cylinder 12；The P mouths of two-position three-way hand change valve II 17 are connected with B mouthfuls, and fluid is from rear steering hydraulic cylinder 12
The E mouthfuls of B mouths that all-hydraulic steering gear 6 is out flowed back to through two-position three-way hand change valve II 17；The P of two position, three-way electromagnetic change valve 15
Mouth is connected with B mouthfuls, and fluid does not circulate；The oil circuit of two-position four-way solenoid directional control valve 9 is closed, and fluid does not circulate.Due to
When steering wheel rotates clockwise or counter-clockwise, the operation principle of all-hydraulic steering gear 6 is identical, this sentences steering wheel and revolves counterclockwise
For the operation principle turned, four-wheel steering synchronization hydraulic system operation principle is as described below：
Fluid is flowed out from fuel tank 1, is flowed by oil-suction oil filter 22, constant flow pump 2, PLF Series Pressures in-line filter 5
The P mouths of all-hydraulic steering gear 6, at this time since the P mouths of all-hydraulic steering gear 6 are connected with A mouthfuls, fluid is from the A of all-hydraulic steering gear 6
Mouth outflow, by two-position three-way hand change valve I 7, hydraulic control one-way valve 10, flows to the F mouths of rear steering hydraulic cylinder 12, turns after promotion
To the piston rod of hydraulic cylinder 12 to left movement, fluid through rear steering hydraulic cylinder 12 E mouths outflow, using hydraulic control one-way valve 10,
Two-position three-way hand change valve II 17 flows back to the B mouths of all-hydraulic steering gear 6, and the B mouths of all-hydraulic steering gear 6 are connected with T mouthfuls at this time,
Fluid is flowed out by the T mouths of all-hydraulic steering gear 6, and fuel tank 1 is flowed back to by MG type throttle valves stream 19.
3rd, four-wheel steering：
As shown in Fig. 4, Fig. 5, Fig. 6, when steering mode selects four-wheel steering, 9 He of two-position four-way solenoid directional control valve is adjusted
Two position, three-way electromagnetic change valve 15 makes its action, and other reversal valves are in initial position, at this time oil pipe and two-position four-way electromagnetism
The operating position of reversal valve 9 and two position, three-way electromagnetic change valve 15 (one end for carrying electromagnet) connects, manual with two-position three way
The initial position of reversal valve I 7 and two-position three-way hand change valve II 17 (one end for carrying spring) connects, i.e., two-position three way is manual
I 7A mouthfuls of P mouths and the two-position three-way hand change valve of reversal valve I 7 is connected, and the P mouths of two-position four-way solenoid directional control valve 9 are connected with B mouthfuls,
The O mouths of two-position four-way solenoid directional control valve 9 are connected with A mouthfuls, and fluid comes out manual through two-position three way from the A mouths of all-hydraulic steering gear 6
After reversal valve I 7, the C mouths of front steering hydraulic cylinder 8 are flowed to all the way, and another way flows to rear steering liquid through two-position four-way solenoid directional control valve 9
The E mouths of cylinder pressure 12；The P mouths of two position, three-way electromagnetic change valve 15 are connected with the A mouths of two position, three-way electromagnetic change valve 15, two-position three way
The P mouths of hand-operated direction valve II 17 are connected with A mouthfuls, and fluid is from gear distributor 14 out through two position, three-way electromagnetic change valve 15, two
Position threeway hand-operated direction valve II 17 flows back to the B mouths of all-hydraulic steering gear 6.When being rotated clockwise or counter-clockwise due to steering wheel,
The operation principle of all-hydraulic steering gear 6 is identical, and for this sentences the operation principle that steering wheel rotates counterclockwise, four-wheel steering synchronizes
Hydraulic work system principle is as described below：
Fluid is flowed out from fuel tank 1, is flowed by oil-suction oil filter 22, constant flow pump 2, PLF Series Pressures in-line filter 5
The P mouths of all-hydraulic steering gear 6, at this time since the P mouths of all-hydraulic steering gear 6 are connected with A mouthfuls, fluid is from the A of all-hydraulic steering gear 6
Mouth outflow by two-position three-way hand change valve I 7, flows to the C mouths of front steering hydraulic cylinder 8 all the way, and another way passes through fluid-control one-way
Valve 10 flows to the E mouths of rear steering hydraulic cylinder 12, and the piston rod of front steering hydraulic cylinder 8 and rear steering hydraulic cylinder 12 is pushed to transport to the right
Dynamic, the F mouths outflow of D mouths and rear steering hydraulic cylinder 12 of the premenstrual hydraulic steering cylinder 8 of fluid, the D mouths of front steering hydraulic cylinder 8 are out
Fluid flows to the left side of gear distributor 14 by two-position four-way solenoid directional control valve 9, the oil of F mouths of rear steering hydraulic cylinder 12 out
Liquid flows to the right side of gear distributor 14 by hydraulic control one-way valve 10, and the fluid come out from gear distributor 14 passes through two-position three way
Solenoid directional control valve 15, two-position three-way hand change valve II 17 flow back to the B mouths of all-hydraulic steering gear 6, at this time all-hydraulic steering gear 6
B mouthfuls are connected with T mouthfuls, and fluid is flowed out by the T mouths of all-hydraulic steering gear 6, and fuel tank 1 is flowed back to by MG types throttle valve 19.
Claims (5)
1. a kind of hilly and mountainous land tractor steering synchronization hydraulic system, it is characterised in that：
The hydraulic system is from fuel feeding component, all-hydraulic steering gear (6), two-position three way manually to valve I (7), front steering hydraulic cylinder
(8), two-position four-way solenoid directional control valve (9), rear steering hydraulic cylinder (12), gear distributor (14), two position, three-way electromagnetic change valve
(15) it is formed with two-position three-way hand change valve II (17)；
Fuel tank (1) is connect with the P mouths of all-hydraulic steering gear (6), A mouths and the two-position three way manual reverse of direction of all-hydraulic steering gear (6)
One end P mouthfuls of valve I (7) is connected, and the other end of two-position three-way hand change valve I (7) has A mouthfuls and B mouthfuls of hydraulic fluid port, and two-position three way is manual
The A mouths of reversal valve I (7) are connected with the C mouths of front steering hydraulic cylinder (8), the B mouths and rear steering of two-position three-way hand change valve I (7)
The F mouths of hydraulic cylinder (12) are connected；
The D mouths of front steering hydraulic cylinder (8) are connect for one end B mouthfuls with two position, three-way electromagnetic change valve (15), in front steering hydraulic cylinder (8)
C mouths and front steering hydraulic cylinder (8) D mouths at it is each it is in parallel all the way respectively with one end A mouthfuls of two-position four-way solenoid directional control valve (9) and
B mouthfuls of connections, P mouthfuls of the other end of two-position four-way solenoid directional control valve (9) on the left of gear distributor (14) with being connected, two-position four-way electromagnetism
The O mouths of reversal valve (9) are connected with the E mouths of rear steering hydraulic cylinder (12), the F mouths of rear steering hydraulic cylinder (12) it is in parallel all the way with gear
The right side of distributor (14) is connected, the E mouths of rear steering hydraulic cylinder (12) it is in parallel all the way with two-position three-way hand change valve II (17)
One end B mouthfuls of connection, gear distributor (14) herein can be according to liquid before and after the different proportional assignments at front-and rear-wheel steer angle
The required flow of cylinder pressure, so as to make front and back wheel realize turn to it is synchronous with return it is positive synchronous；
One end A mouthfuls of the oil outlet connection two position, three-way electromagnetic change valve (15) of gear distributor (14), two-position three-way electromagnetic changes
It is connect to P mouthfuls of the other end of valve (15) with one end A mouthfuls of two-position three-way hand change valve II (17), two-position three-way hand change valve
P mouthfuls of the other end of II (17) is connect with the B mouths of all-hydraulic steering gear (6),
The T mouths of the all-hydraulic steering gear (6) take back fuel tank (1), and throttling is equipped on oil return line by oil return line
Valve.
2. a kind of hilly and mountainous land tractor steering synchronization hydraulic system as described in claim 1, it is characterised in that：
One group of hydraulic lock (11) is further included in the hydraulic system, the hydraulic lock is made of four hydraulic control one-way valves (10)；
First hydraulic control one-way valve is connected on the connecting line of F mouthfuls of two-position three-way hand change valve I (7) and rear steering hydraulic cylinder (12)
On；Second hydraulic control one-way valve is connected on the connection of E mouthfuls of O mouthfuls of two-position four-way solenoid directional control valve (9) and rear steering hydraulic cylinder (12)
On pipeline；Third hydraulic control one-way valve is connected on F mouthfuls of rear steering hydraulic cylinder (12) and the connecting tube on the right side of gear distributor (14)
On the road；4th hydraulic control one-way valve is connected on B mouthfuls of E mouthfuls of rear steering hydraulic cylinder (12) and two-position three-way hand change valve II (17)
On connecting line；When not needing to rear steering hydraulic cylinder (12) work, hydraulic lock (11) can lock rear steering hydraulic cylinder (12)
Firmly, the security performance of tractor is improved.
3. a kind of hilly and mountainous land tractor steering synchronization hydraulic system as described in claim 1, it is characterised in that：
The fuel feeding component is by fuel tank (1), constant flow pump (2), pressure measuring tie-in (3), pressure gauge PTB series pressure measuring unit (4), PLF
Series Pressure in-line filter (5) and oil-suction oil filter (22) composition；Fuel tank (1) is connected by oil pipe with constant flow pump (2), oil suction
Oil filter (22) is connected on the connecting line of fuel tank (1) and constant flow pump (2), for filtering the impurity in fluid；Constant flow pump (2)
It is connected together with PLF Series Pressures in-line filter (5) by oil pipe；Pressure measuring tie-in (3) and pressure gauge PTB series pressure measurement dress
The exit that (4) are connected in parallel on constant flow pump (2) is put, for the pressure of measuring system；PLF Series Pressures in-line filter (5) is through oil
Pipe is connect with the P mouths of all-hydraulic steering gear (6).
4. a kind of hilly and mountainous land tractor steering synchronization hydraulic system as described in claim 1 or 3, it is characterised in that：
Throttle valve on oil return line is MG types throttle valve (19), and MG types throttle valve (19) takes back fuel tank by oil pipe
(1), meanwhile, hydraulic air filter (20) for filtering air plankton is installed at fuel tank (1) and for measuring oil
The liquid level liquid thermometer (21) of oil level and temperature in case (1).
5. a kind of rotating direction control method of hilly and mountainous land tractor steering synchronization hydraulic system as claimed in claim 4, feature
It is：
The rotating direction control method includes front-wheel steer control process, rear-axle steering control process and four-wheel steering and controlled
Journey；Aspect disk rotates counterclockwise, and the P mouths of all-hydraulic steering gear (6) are connected with A mouthfuls, and T mouthfuls are connected with B mouthfuls；Aspect disk revolves clockwise
When turning, the P mouths of all-hydraulic steering gear (6) are connected with B mouthfuls, and T mouthfuls are connected with A mouthfuls；
During front-wheel steer control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during, hydraulic pressure
Each valve state all same of system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three-way hand change valve
The P mouths of I (7) are connected with A mouthfuls, and fluid is out flowed to from the A mouths of all-hydraulic steering gear (6) through two-position three-way hand change valve I (7)
Front steering hydraulic cylinder (8)；The P mouths of two position, three-way electromagnetic change valve (15) are connected with B mouthfuls, and fluid is from the D of preceding hydraulic steering cylinder (8)
Hydraulic fluid port out flows to two-position three-way hand change valve II (17) through two position, three-way electromagnetic change valve (15)；Two-position three way manual reverse of direction
The P mouths of valve II (17) are connected with A mouthfuls, and fluid out changes manually from the P mouths of two position, three-way electromagnetic change valve (15) through two-position three way
The B mouths of all-hydraulic steering gear (6) are flowed back to valve II (17)；The oil circuit of two-position four-way solenoid directional control valve (9) is closed；
During rear-axle steering control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during, hydraulic pressure
Each valve state all same of system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three-way hand change valve
The P mouths of I (7) are connected with B mouthfuls, and fluid is out flowed to from the A mouths of all-hydraulic steering gear (6) through two-position three-way hand change valve I (7)
The F mouths of rear steering hydraulic cylinder (12)；The P mouths of two-position three-way hand change valve II (17) are connected with B mouthfuls, and fluid is from rear steering hydraulic pressure
The E mouths of cylinder (12) come out the B mouths that all-hydraulic steering gear (6) is flowed back to through two-position three-way hand change valve II (17)；Two-position three way electricity
The P mouths of magnetic reversal valve (15) are connected with B mouthfuls, and fluid does not circulate；The oil circuit of two-position four-way solenoid directional control valve (9), which is in, closes shape
State；
During four-wheel steering control, aspect disk is rotated clockwise rotate control counterclockwise with aspect disk during, hydraulic pressure
Each valve state all same of system, and fluid flow to it is reciprocal；When steering wheel rotates counterclockwise, two-position three-way hand change valve
The P mouths of I (7) are connected with A mouthfuls, and the P mouths of two-position four-way solenoid directional control valve (9) are connected with B mouthfuls, two-position four-way solenoid directional control valve (9)
O mouths be connected with A mouthfuls, fluid from the A mouths of all-hydraulic steering gear (6) out after two-position three-way hand change valve I (7), all the way
The C mouths of front steering hydraulic cylinder (8) are flowed to, another way flows to the E of rear steering hydraulic cylinder (12) through two-position four-way solenoid directional control valve (9)
Mouthful；The P mouths of two position, three-way electromagnetic change valve (15) are connected with A mouthfuls, the P mouths and A mouthfuls of phases of two-position three-way hand change valve II (17)
Even, fluid is come out from gear distributor (14) through two position, three-way electromagnetic change valve (15), two-position three-way hand change valve II (17)
Flow back to the B mouths of all-hydraulic steering gear (6)；Before gear distributor (14) can be divided in portion according to the difference at front-and rear-wheel steer angle
Hydraulic steering cylinder (8) and rear steering hydraulic cylinder (12) required flow turn to synchronous and Hui Zhengtong so as to realize front and back wheel
Step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710204346.7A CN107061387B (en) | 2017-03-31 | 2017-03-31 | A kind of hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710204346.7A CN107061387B (en) | 2017-03-31 | 2017-03-31 | A kind of hilly and mountainous land tractor steering synchronization hydraulic system and rotating direction control method |
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| CN107061387B true CN107061387B (en) | 2018-06-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431163A2 (en) * | 2002-12-17 | 2004-06-23 | Still Gmbh | Hydraulic drive |
| CN202266536U (en) * | 2011-09-29 | 2012-06-06 | 徐州重型机械有限公司 | Hydraulic control valve and engineering machinery running system |
| CN102582425A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Walking hydraulic control system and self-walking type engineering machinery utilizing same |
| CN206708118U (en) * | 2017-03-31 | 2017-12-05 | 吉林大学 | A kind of hilly and mountainous land tractor steering synchronization hydraulic system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5743280B2 (en) * | 2011-11-15 | 2015-07-01 | 株式会社Ｉｈｉ検査計測 | Hydraulic control device for transfer device |
-
2017
- 2017-03-31 CN CN201710204346.7A patent/CN107061387B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431163A2 (en) * | 2002-12-17 | 2004-06-23 | Still Gmbh | Hydraulic drive |
| CN202266536U (en) * | 2011-09-29 | 2012-06-06 | 徐州重型机械有限公司 | Hydraulic control valve and engineering machinery running system |
| CN102582425A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Walking hydraulic control system and self-walking type engineering machinery utilizing same |
| CN206708118U (en) * | 2017-03-31 | 2017-12-05 | 吉林大学 | A kind of hilly and mountainous land tractor steering synchronization hydraulic system |
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