CN109911011A - A kind of crawler tractor automatic turning hydraulic system - Google Patents
A kind of crawler tractor automatic turning hydraulic system Download PDFInfo
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- CN109911011A CN109911011A CN201910291547.4A CN201910291547A CN109911011A CN 109911011 A CN109911011 A CN 109911011A CN 201910291547 A CN201910291547 A CN 201910291547A CN 109911011 A CN109911011 A CN 109911011A
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims description 160
- 239000012530 fluid Substances 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000916 dilatatory effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
A kind of crawler tractor automatic turning hydraulic system, comprising: guide proportion pressure valve, auto-steering valve block assembly, two-position two-way solenoid valve, the reversing solenoid valve that reverses gear, shaft orientation plunger variable pump, quantitative bent-axis piston motor, hydraulic oil container etc.；Guide proportion pressure valve, which is mounted on, to be turned in machine base, and the control crank end of guide proportion pressure valve is stuck in the slot of cam disc；Auto-steering valve block assembly is mounted on the medial surface bracket of vehicle frame left back；Two-position two-way solenoid valve is mounted on the left back support of driver's cabin；The reversing solenoid valve that reverses gear is installed on frame inside face；Shaft orientation plunger variable pump is mounted on the case of rear axle side；Quantitative bent-axis piston motor is installed in rear axle box；Hydraulic oil container is located at behind driver's cabin.The stepless control of turning radius of crawler tractor may be implemented in this system, in conjunction with GPS or Big Dipper satellite signal after the auto-steering function of tractor may be implemented；With auto-steering mode and artificial steering pattern, and both of which may be implemented to switch mutually.
Description
Technical field
The invention belongs to endless-track vehicle field, it is related to a kind of endless-track vehicle automatic turning hydraulic system, more particularly to a kind of
Crawler tractor automatic turning hydraulic system.
Background technique
In recent years, precision agriculture has been widely used in agricultural modernization production, in order to reach scientific and reasonable benefit
With agricultural resource, the purpose for improving crop yield, reducing production cost, agricultural machinery is played in precision agriculture to Guan Chong
The effect wanted.Application of the Tendency of Agricultural Machinery in China in terms of precision agriculture at present is concentrated mainly on dilatory machine automatic drive system.From
The dynamic core driven is effective control to tractor steering system: being easily achieved, turns including control medium (liquid, gas, electricity)
It can step-less adjustment to the size of radius.
In the prior art, crawler tractor steering generallys use steering cluth structure, and mode of operation mainly has two
Kind: the first, steering linkage is fully withdrawn, and steering cluth is kept completely separate, and is braked to slower-moving track, is turned at this time
Radius is about 0.5 times of gauge；Second, two side brakes are totally released, and side steering cluth is partially or wholly separated at a slow speed,
Steering moment is generated by the difference for drawing machine host high, low speed side track drive power, turning radius and the two sides crawler belt moment of resistance
(driving moment is opposite with two sides crawler belt moment of resistance numerical value equal direction) is self-reacting.Its value is by surface condition, tractor
The factors such as main machine structure quality, geometric parameter influence, even if same steering linkage position, turning radius is also uncertain
's.In addition, the steering linkage stroke of very little can also cause the variation that steering cluth pressing force in side is very big at a slow speed, low speed side crawler belt
Driving force accordingly can also generate great changes.So can not be solved by steering cluth steering structure form in steering resistence
The accurate control of turning radius under contingent condition.
Realize the control to steering since wheeled tractor generallys use deflection front-wheel, thus the size of turning radius by
Wheeled tractor front-wheel deflection angle determines.In wheeled tractor all hydraulic pressure steering-gear, the size of front-wheel deflection angle by
The stroke of steering cylinder controls, and stroke with enter oil cylinder oil liquid number it is related.Therefore, in wheeled tractor from turn
Into system, rely primarily on control enter steering cylinder oil liquid number (i.e. control flow) realize the control to steering.And
Crawler tractor turns to and wheeled tractor is entirely different in mechanism, therefore wheeled tractor auto-steering technology can not carry out
It is promoted and applied on band tractor.
Therefore it provides one kind is compact-sized, safe and reliable, can conveniently and efficiently guarantee crawler tractor from turn
To hydraulic system, be completely it is necessary.
Summary of the invention
It is an object of that present invention to provide a kind of automatic turning hydraulics of compact-sized, safe and reliable crawler tractor
System.
The technical scheme is that a kind of crawler tractor automatic turning hydraulic system, comprising: radiator, pilot ratio
It is example pressure valve, auto-steering valve block assembly, two-position two-way solenoid valve, the reversing solenoid valve that reverses gear, shaft orientation plunger variable pump, quantitative curved
Axis piston motor, hydraulic oil container, cam disc；Radiator is bolted on engine water tank front end；Guide proportion pressure valve
It is mounted in the steering machine base of driver's cabin lower front, the control crank end of guide proportion pressure valve is stuck in the slot of cam disc
Interior, cam disc is connected with steering wheel；Auto-steering valve block assembly is mounted on the medial surface bracket of vehicle frame left back；Two two
Three-way electromagnetic valve is mounted on the left back support of driver's cabin；The reversing solenoid valve that reverses gear is located at behind auto-steering valve block assembly, is installed on
Frame inside face；Shaft orientation plunger variable pump is mounted on the case of rear axle side；Quantitative bent-axis piston motor is installed in rear axle box；It is hydraulic
Fuel tank is located at behind driver's cabin, above rear axle.
The 7th oil inlet, third oil outlet are provided on the radiator；The 7th oil inlet and axial columns of radiator
The second drain tap connection of variable pump is filled in, the third oil outlet of radiator is connected to hydraulic oil container.
The first oil inlet, the first oil return opening, the first actuator port, the second work are provided in the guide proportion pressure valve
Make hydraulic fluid port；First oil inlet of guide proportion pressure valve is connected to the third oil return opening of two-position two-way solenoid valve；Guide proportion pressure
First oil return opening of power valve is connected to by pipeline with hydraulic oil container；The first actuator port and auto-steering of guide proportion pressure valve
5th oil inlet of valve block assembly is connected to；Second actuator port of guide proportion pressure valve and the 6th of auto-steering valve block assembly
Oil inlet connection.
Be provided on the auto-steering valve block assembly the second oil inlet, the second oil return opening, the 5th oil inlet, the 6th into
Hydraulic fluid port, the first oil outlet, the second oil outlet；Second oil inlet of auto-steering valve block assembly and shaft orientation plunger variable pump it is built-in
4th oil outlet of slippage pump is connected to, and the second oil return opening of auto-steering valve block assembly is connected to fuel tank, and auto-steering valve block is total
At the 5th oil inlet be connected to the first actuator port of guide proportion pressure valve；6th oil inlet of auto-steering valve block assembly
It is connected to the second actuator port of guide proportion pressure valve, the first oil outlet of auto-steering valve block assembly and the electromagnetism that commutates that reverses gear
The connection of the 4th oil inlet of valve；Second oil outlet of auto-steering valve block assembly and the 4th oil return opening of the reversing solenoid valve that reverses gear connect
It is logical.
Third oil inlet, third oil return opening are provided on the two-position two-way solenoid valve；The of two-position two-way solenoid valve
Three oil inlets are connected to the 4th oil outlet of the built-in slippage pump of shaft orientation plunger variable pump, the third oil return of two-position two-way solenoid valve
Mouth is connected to the first oil inlet of guide proportion pressure valve.
The 4th oil inlet, the 4th oil return opening, third actuator port, the 4th work are provided on the reversing solenoid valve that reverses gear
Make hydraulic fluid port；The 4th oil inlet of reversing solenoid valve that reverses gear is connected to the first oil outlet of auto-steering valve block assembly；Reverse gear the electricity that commutates
4th oil return opening of magnet valve is connected to the second oil outlet of auto-steering valve block assembly, the third working oil for the reversing solenoid valve that reverses gear
Mouth is connected to the first control mouth of shaft orientation plunger variable pump；Reverse gear the 4th actuator port and axial plunger variable of reversing solenoid valve
The second control mouth connection of pump.
The 5th actuator port, the 6th actuator port, the first drain tap, second are provided on the shaft orientation plunger variable pump
Drain tap, inlet port, the 4th oil outlet of built-in slippage pump, the first control mouth, the second control mouth；The of shaft orientation plunger variable pump
Five actuator ports are connected to the 7th actuator port of quantitative bent-axis piston motor；6th actuator port of shaft orientation plunger variable pump with
The 8th actuator port connection of quantitative bent-axis piston motor；First drain tap of shaft orientation plunger variable pump and quantitative bent-axis piston horse
The third drain tap connection reached；Second drain tap of shaft orientation plunger variable pump is connected to the 7th oil inlet of radiator, axial columns
The inlet port for filling in variable pump is connected to hydraulic oil container, and the 4th oil outlet of the built-in slippage pump of shaft orientation plunger variable pump is two tunnels, and one
Road is connected to the third oil inlet of two-position two-way solenoid valve, and another way is connected to the second oil inlet of auto-steering valve block assembly, axial
First control mouth of plunger variable pump is connected to the third actuator port for the reversing solenoid valve that reverses gear；The second of shaft orientation plunger variable pump
Control mouth is connected to the 4th actuator port of the reversing solenoid valve that reverses gear.
The 7th actuator port, the 8th actuator port, third drain tap are provided on the quantitative bent-axis piston motor；It is fixed
7th actuator port of amount bent-axis piston motor is connected to the 5th actuator port of shaft orientation plunger variable pump；Quantitative bent-axis piston horse
The 8th actuator port reached is connected to the 6th actuator port of shaft orientation plunger variable pump；The third draining of quantitative bent-axis piston motor
Mouth is connected to the first drain tap of shaft orientation plunger variable pump.
The present invention can reach following the utility model has the advantages that the steering of crawler tractor may be implemented afterwards by adopting the above technical scheme
The stepless control of radius, in conjunction with GPS or Big Dipper satellite signal after the auto-steering function of tractor may be implemented；Turning to has certainly
Dynamic steering pattern and artificial steering pattern, and may be implemented to switch mutually under both of which, artificial mode is prior to auto-steering
Mode.It is provided simultaneously with safety cut-off function, when driver is not on driver's seat, the artificial steering pattern failure of tractor.This
When, to the left, rotates to the right steering wheel its tractor turn direction and do not advanced by it, retreat and influenced；Have commutation function of reversing gear,
Motor rotation direction is exchanged when advancing, retreating, it can be achieved that being experienced with the consistent manipulation of wheeled tractor.
Detailed description of the invention
Fig. 1 is a kind of crawler tractor automatic turning hydraulic system arrangement schematic diagram on tractor of the present invention；
Fig. 2 is a kind of Hydraulic System Principle schematic diagram of crawler tractor automatic turning hydraulic system of the present invention；
Fig. 3 is a kind of artificial steering pattern schematic diagram of crawler tractor automatic turning hydraulic system of the present invention；
Fig. 4 is a kind of auto-steering pattern diagram of crawler tractor automatic turning hydraulic system of the present invention.
Fig. 5 is a kind of guide proportion pressure valve of crawler tractor automatic turning hydraulic system of the present invention and cam disc position
Schematic diagram.
Fig. 6 is the A of Fig. 5 to schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.As shown in figs. 1 to 6, a kind of crawler tractor
Automatic turning hydraulic system specifically includes that radiator 1, guide proportion pressure valve 2, auto-steering valve block assembly 3, bi-bit bi-pass
Solenoid valve 4, the reversing solenoid valve 5 that reverses gear, shaft orientation plunger variable pump 6, quantitative bent-axis piston motor 7, hydraulic oil container 8, cam disc 9.
Radiator 1 is bolted on engine water tank front end；Guide proportion pressure valve 2 is mounted on driver's cabin front lower place, turning machine
The control crank end of chassis interior, guide proportion pressure valve 2 is stuck in the slot of cam disc 9, and the slot of cam disc 9 is eccentric screw
Line.When cam disc 9 rotates clockwise, groove center line is more and more closer with rotary middle spindle；When rotating counterclockwise, groove center line with turn
Dynamic central axis is more and more remoter.Cam disc 9 and steering wheel are connected by mechanical mechanism, and are rotated together with steering wheel.Cam
The rotation of disk 9 drives the control crank of guide proportion pressure valve 2 to swing.Auto-steering valve block assembly 3 is mounted on a vehicle frame left side
On the medial surface bracket of rear；Two-position two-way solenoid valve 4 is mounted on the left back support of driver's cabin；The reversing solenoid valve 5 that reverses gear is located at certainly
Turn to behind valve block assembly 3, be installed on frame inside face；Shaft orientation plunger variable pump 6 is mounted on the case of rear axle side；Quantitative cambered axle
Piston motor 7 is installed on rear axle top box；Hydraulic oil container 8 is located at behind driver's cabin, above rear axle.
The 7th oil inlet IN3, third oil outlet OUT3 are provided on the radiator 1；7th oil inlet of radiator 1
IN3 is connected to the second drain tap L2 of shaft orientation plunger variable pump 6, and the third oil outlet OUT3 and hydraulic oil container 8 of radiator 1 connect
It is logical.
The first oil inlet P 1, the first oil return inlet T 1, the first actuator port are provided in the guide proportion pressure valve 2
A1, the second actuator port B1；The third oil return opening of first oil inlet P 1 and two-position two-way solenoid valve 4 of guide proportion pressure valve 2
T3 connection；First oil return inlet T 1 of guide proportion pressure valve 2 is connected to by pipeline with hydraulic oil container 8；Guide proportion pressure valve 2
First actuator port A1 is connected to the 5th oil inlet IN1 of auto-steering valve block assembly 3；Second work of guide proportion pressure valve 2
Make hydraulic fluid port B1 to be connected to the 6th oil inlet IN2 of auto-steering valve block assembly 3.
The second oil inlet P 2, the second oil return inlet T 2, the 5th oil inlet are provided on the auto-steering valve block assembly 3
IN1, the 6th oil inlet IN2, the first oil outlet OUT1, the second oil outlet OUT2；Second oil inlet of auto-steering valve block assembly 3
P2 is connected to the 4th oil outlet M3 of the built-in slippage pump Ps of shaft orientation plunger variable pump 6, and second time of auto-steering valve block assembly 3
Hydraulic fluid port T2 is connected to fuel tank 8, the 5th oil inlet IN1 of auto-steering valve block assembly 3 and the first work of guide proportion pressure valve 2
Hydraulic fluid port A1 connection；6th oil inlet IN2 of auto-steering valve block assembly 3 and the second actuator port B1 of guide proportion pressure valve 2
Connection, the first oil outlet OUT1 of auto-steering valve block assembly 3 are connected to the 4th oil inlet P 4 of reversing solenoid valve 5 of reversing gear；Automatically
Second oil outlet OUT2 of switching valve block assembly 3 is connected to the 4th oil return inlet T 4 of the reversing solenoid valve 5 that reverses gear.
Third oil inlet P 3, third oil return inlet T 3 are provided on the two-position two-way solenoid valve 4；Two-position two-way solenoid valve
4 third oil inlet P 3 is connected to the 4th oil outlet M3 of the built-in slippage pump Ps of shaft orientation plunger variable pump 6, bi-bit bi-pass electromagnetism
The third oil return inlet T 3 of valve 4 is connected to the first oil inlet P 1 of guide proportion pressure valve 2.
The 4th oil inlet P 4, the 4th oil return inlet T 4, third actuator port are provided on the reversing solenoid valve 5 that reverses gear
A2, the 4th actuator port B2；First oil outlet of the 4th oil inlet P 4 and auto-steering valve block assembly 3 of reversing solenoid valve 5 of reversing gear
OUT1 connection；The 4th oil return inlet T 4 of reversing solenoid valve 5 of reversing gear and the second oil outlet OUT2 of auto-steering valve block assembly 3 connect
Logical, the third actuator port A2 for the reversing solenoid valve 5 that reverses gear is connected to the first control mouth X1 of shaft orientation plunger variable pump 6；It reverses gear and changes
The second control mouth X2 of the 4th actuator port B2 and shaft orientation plunger variable pump 6 to solenoid valve 5 are connected to.
The 5th actuator port A3, the 6th actuator port B3, the first drain tap are provided on the shaft orientation plunger variable pump 6
L1, the second drain tap L2, inlet port S, the 4th oil outlet M3 of built-in slippage pump Ps, the first control mouth X1, the second control mouth X2；
5th actuator port A3 of shaft orientation plunger variable pump 6 is connected to the 7th actuator port A4 of quantitative bent-axis piston motor 7；Axial columns
The 6th actuator port B3 for filling in variable pump 6 is connected to the 8th actuator port B4 of quantitative bent-axis piston motor 7；Axial plunger variable
First drain tap L1 of pump 6 is connected to the third drain tap L3 of quantitative bent-axis piston motor 7；The second of shaft orientation plunger variable pump 6
Drain tap L2 is connected to the 7th oil inlet IN3 of radiator 1, and the inlet port S of shaft orientation plunger variable pump 6 is connected to hydraulic oil container 8, axis
The 4th oil outlet M3 to the built-in slippage pump Ps of plunger variable pump 6 is two tunnels, is connected to the third of two-position two-way solenoid valve 4 all the way
Oil inlet P 3, another way are connected to the second oil inlet P 2 of auto-steering valve block assembly 3, the first control of shaft orientation plunger variable pump 6
Mouth X1 is connected to the third actuator port A2 for the reversing solenoid valve 5 that reverses gear；Second control mouth X2 of shaft orientation plunger variable pump 6 with reverse gear
4th actuator port B2 of reversing solenoid valve 5 is connected to.
The 7th actuator port A4, the 8th actuator port B4, third draining are provided on the quantitative bent-axis piston motor 7
Mouth L3；7th actuator port A4 of quantitative bent-axis piston motor 7 is connected to the 5th actuator port A3 of shaft orientation plunger variable pump 6；
8th actuator port B4 of quantitative bent-axis piston motor 7 is connected to the 6th actuator port B3 of shaft orientation plunger variable pump 6；It is quantitative curved
The third drain tap L3 of axis piston motor 7 is connected to the first drain tap L1 of shaft orientation plunger variable pump 6.
Artificial steering pattern, as shown in Figure 2-5, i.e., when auto-steering valve block assembly 3 does not work: auto-steering valve block is total
It is connected at 3 the 5th oil inlet IN1 with the first oil outlet OUT1, the 6th oil inlet IN2 is connected with the second oil outlet OUT2.
Slippage pump Ps built in shaft orientation plunger variable pump 6 passes through bis- tunnel the 4th oil outlet M3 Fen Wei, all the way through two-position two-way solenoid valve 4 to first
Lead the first oil inlet P 1 of proportional pressure valve 2, the second oil inlet P 2 of another way to auto-steering valve block assembly 3.Reach guide
The pressure oil of proportional pressure valve 2 is after 2 pressure regulation of guide proportion pressure valve, according to the difference of steering wheel direction of rotation, after pressure regulation
Pressure oil respectively the first actuator port A1 through guide proportion pressure valve 2 or the second actuator port B1 outflow, guide proportion pressure
First actuator port A1 of power valve 2 is connected with the 5th oil inlet IN1 of auto-steering valve block assembly 3, guide proportion pressure valve
2 the second actuator port B1 is connected with IN2 mouthfuls of the 6th oil inlet of auto-steering valve block assembly 3, guide proportion pressure valve 2
First oil return inlet T 1 is connected with hydraulic oil container 8.The first oil outlet OUT1, the second oil outlet of auto-steering valve block assembly 3
OUT2 is connected with the first control mouth X1 of shaft orientation plunger variable pump 6, the second control mouth X2 respectively by the reversing solenoid valve 5 that reverses gear
It is logical.5th actuator port A3 of shaft orientation plunger variable pump 6 is connected with the 7th actuator port A4 of quantitative bent-axis piston motor 7.
6th actuator port B3 of shaft orientation plunger variable pump 6 is connected with the 8th actuator port B4 of quantitative bent-axis piston motor 7.Direction
Disk rotates clockwise, the first actuator port A1 pressure oil output of guide proportion pressure valve 2, and quantitative bent-axis piston motor 7 starts
It rotates clockwise, crawler tractor starts to turn to the right；With the increase of the rotational angle of steering wheel, guide proportion pressure valve 2
First actuator port A1 output pressure becomes larger, and the discharge capacity of shaft orientation plunger variable pump 6 increases, quantitative 7 revolving speed liter of bent-axis piston motor
Height, the left track and right side track rotational speed difference of crawler tractor increase, and left track is greater than right side track revolving speed, turns right
It is gradually reduced to radius.Steering wheel rotates counterclockwise, the second actuator port B1 pressure oil output of guide proportion pressure valve 2, fixed
Amount bent-axis piston motor 7 starts to rotate counterclockwise, and crawler tractor starts to turn to the left；With the increasing of the rotational angle of steering wheel
Greatly, the second actuator port B1 output pressure of guide proportion pressure valve 2 becomes larger, and the discharge capacity of shaft orientation plunger variable pump 6 increases, quantitative
7 revolving speed of bent-axis piston motor increases, and the right side track and left track rotational speed difference of crawler tractor increase, and right side track is greater than
Left track revolving speed, turning radius is gradually reduced to the left.When artificial steering, auto-steering valve block assembly electromagnet is completely in mistake
Electricity condition, at this point, artificial turn to has priority.
Auto-steering mode, as figures 2-6, i.e., when auto-steering valve block assembly 3 works: auto-steering valve block assembly 3
Electromagnet obtains electric, and the 5th oil inlet IN1 or the 6th oil inlet IN2 of auto-steering valve block assembly 3 are truncated, the first oil outlet
OUT1 or the second oil outlet OUT2 is communicated with the second oil inlet P 2 of auto-steering valve block 3.Repairing built in shaft orientation plunger variable pump 6
Pump Ps by the 4th oil outlet M3 enter the second oil inlet P 2 of auto-steering valve block assembly 3, auto-steering valve block assembly 3 the
Two oil return inlet Ts 2 are connected with fuel tank 8.The first oil outlet OUT1, the second oil outlet OUT2 of auto-steering valve block assembly 3 pass through
The reversing solenoid valve 5 that reverses gear is connected with the first control mouth X1 of shaft orientation plunger variable pump 6, the second control mouth X2 respectively.Axial columns
The 5th actuator port A3 for filling in variable pump 6 is connected with the 7th actuator port A4 of quantitative bent-axis piston motor 7.Axial plunger becomes
6th actuator port B3 of amount pump 6 is connected with the 8th actuator port B4 of quantitative bent-axis piston motor 7.Auto-steering valve block is total
Go out pressure signal at 3 the first oil outlet OUT1 or the second oil outlet OUT2, the size of pressure signal is by auto-steering valve block 3
Proportion electro-magnet size of current adjust, final pressure signal goes the displacement size of control shaft orientation plunger variable pump 6, and then controls
The revolving speed of formulation amount bent-axis piston motor 7.The difference of electric electromagnet is obtained by auto-steering valve block assembly 3 to change quantitative cambered axle
The rotation direction of piston motor 7.
It reverses gear steering: being only used for manually turning to, that is, the reversing solenoid valve 5 that reverses gear is in and is powered on state: flowing through down at this time
The oil circuit direction of gear reversing solenoid valve 5 is exchanged.When vehicle advances, the reversing solenoid valve 5 that reverses gear does not work, the side of rotating clockwise
To disk, vehicle left side crawler belt velocity of rotation will be faster than right side track speed, and vehicle turns to the right；When vehicle rollback, reverses gear and change
It is in solenoid valve 5 and is powered on state, rotate clockwise steering wheel, the pressure signal reversing solenoid valve 5 that reversed gear is exchanged, vehicle
Left track velocity of rotation will be slower than right side track speed, and vehicle turns left；
Safeguard protection: being only used for manually turning to, i.e., two-position two-way solenoid valve 4 is in and is powered on state: flowing through two two at this time
The oil circuit of three-way electromagnetic valve 4 is cut off, and the oil inlet of guide proportion pressure valve 2 is cut off, no matter how steering wheel acts, guide proportion
Pressure valve 2 there is not pressure signal output, and vehicle not can be carried out steering.
Finally it should be noted that: the foregoing is only a preferred embodiment of the present invention, is not limited to this hair
Bright full content, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art
For, formal modification can be still carried out to technical solution documented by previous embodiment, or to part of skill
Art feature is equivalently replaced.All made form modifications within thinking enlightenment of the invention, equivalent replacement etc., should all wrap
It is contained within the scope of the present invention.
Claims (8)
1. a kind of crawler tractor automatic turning hydraulic system, comprising: radiator (1), guide proportion pressure valve (2), from turn
To valve block assembly (3), two-position two-way solenoid valve (4), the reversing solenoid valve that reverses gear (5), shaft orientation plunger variable pump (6), quantitative cambered axle
Piston motor (7), hydraulic oil container (8), cam disc (9)；It is characterized by: radiator (1) is bolted on engine water
Case front end；Guide proportion pressure valve (2) is mounted in the steering machine base of driver's cabin lower front, guide proportion pressure valve (2)
Control crank end be stuck in the slot of cam disc (9), cam disc (9) is connected with steering wheel；Auto-steering valve block assembly
(3) it is mounted on the medial surface bracket of vehicle frame left back；Two-position two-way solenoid valve (4) is mounted on the left back support of driver's cabin；It reverses gear
Reversing solenoid valve (5) is located at behind auto-steering valve block assembly (3), is installed on frame inside face；Shaft orientation plunger variable pump (6) peace
On the case of rear axle side；Quantitative bent-axis piston motor (7) are installed in rear axle box；Hydraulic oil container (8) is located at behind driver's cabin, after
Above bridge.
2. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: heat dissipation
The 7th oil inlet (IN3), third oil outlet (OUT3) are provided on device (1)；The 7th oil inlet (IN3) and axis of radiator (1)
It is connected to the second drain tap (L2) of plunger variable pump (6), the third oil outlet (OUT3) of radiator (1) and hydraulic oil container (8)
Connection.
3. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
Guide proportion pressure valve (2) on be provided with the first oil inlet (P1), the first oil return opening (T1), the first actuator port (A1),
Two actuator ports (B1)；The first oil inlet (P1) of guide proportion pressure valve (2) and the third oil return of two-position two-way solenoid valve (4)
Mouth (T3) connection；The first oil return opening (T1) of guide proportion pressure valve (2) is connected to by pipeline with hydraulic oil container (8)；Pilot ratio
The first actuator port (A1) of example pressure valve (2) is connected to the 5th oil inlet (IN1) of auto-steering valve block assembly (3)；Guide
The second actuator port (B1) of proportional pressure valve (2) is connected to the 6th oil inlet (IN2) of auto-steering valve block assembly (3).
4. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
Auto-steering valve block assembly (3) on be provided with the second oil inlet (P2), the second oil return opening (T2), the 5th oil inlet (IN1),
Six oil inlets (IN2), the first oil outlet (OUT1), the second oil outlet (OUT2)；Second oil inlet of auto-steering valve block assembly (3)
Mouth (P2) is connected to the 4th oil outlet (M3) of the built-in slippage pump (Ps) of shaft orientation plunger variable pump (6), and auto-steering valve block is total
It is connected at second oil return opening (T2) of (3) with fuel tank (8), the 5th oil inlet (IN1) of auto-steering valve block assembly (3) and guide
The first actuator port (A1) of proportional pressure valve (2) is connected to；6th oil inlet (IN2) of auto-steering valve block assembly (3) and elder generation
Lead proportional pressure valve (2) the second actuator port (B1) connection, the first oil outlet (OUT1) of auto-steering valve block assembly (3) with
The 4th oil inlet (P4) of reversing solenoid valve (5) that reverses gear connection；The second oil outlet (OUT2) of auto-steering valve block assembly (3) with fall
Keep off the 4th oil return opening (T4) connection of reversing solenoid valve (5).
5. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
Two-position two-way solenoid valve (4) on be provided with third oil inlet (P3), third oil return opening (T3)；Two-position two-way solenoid valve (4)
Third oil inlet (P3) is connected to the 4th oil outlet (M3) of the built-in slippage pump (Ps) of shaft orientation plunger variable pump (6), and two two
The third oil return opening (T3) of three-way electromagnetic valve (4) is connected to the first oil inlet (P1) of guide proportion pressure valve (2).
6. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
The reversing solenoid valve that reverses gear (5) on be provided with the 4th oil inlet (P4), the 4th oil return opening (T4), third actuator port (A2),
Four actuator ports (B2)；It reverses gear the first fuel-displaced of the 4th oil inlet (P4) of reversing solenoid valve (5) and auto-steering valve block assembly (3)
Mouth (OUT1) connection；Reverse gear reversing solenoid valve (5) the 4th oil return opening (T4) and auto-steering valve block assembly (3) it is second fuel-displaced
Mouth (OUT2) connection, the third actuator port (A2) of the reversing solenoid valve that reverses gear (5) and first control of shaft orientation plunger variable pump (6)
Mouth (X1) connection；Reverse gear reversing solenoid valve (5) the 4th actuator port (B2) and shaft orientation plunger variable pump (6) the second control mouth
(X2) it is connected to.
7. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
Shaft orientation plunger variable pump (6) on be provided with the 5th actuator port (A3), the 6th actuator port (B3), the first drain tap (L1),
Second drain tap (L2), inlet port (S), the 4th oil outlet (M3) of built-in slippage pump (Ps), the first control mouth (X1), the second control
Donsole (X2)；7th working oil of the 5th actuator port (A3) of shaft orientation plunger variable pump (6) and quantitative bent-axis piston motor (7)
Mouth (A4) connection；8th work of the 6th actuator port (B3) of shaft orientation plunger variable pump (6) and quantitative bent-axis piston motor (7)
Hydraulic fluid port (B4) connection；The third draining of the first drain tap (L1) of shaft orientation plunger variable pump (6) and quantitative bent-axis piston motor (7)
Mouth (L3) connection；The second drain tap (L2) of shaft orientation plunger variable pump (6) is connected to the 7th oil inlet (IN3) of radiator (1),
The inlet port (S) of shaft orientation plunger variable pump (6) is connected to hydraulic oil container (8), the built-in slippage pump (Ps) of shaft orientation plunger variable pump (6)
The 4th oil outlet (M3) be two tunnels, all the way be connected to two-position two-way solenoid valve (4) third oil inlet (P3), another way connection from
Turn the first control mouth (X1) of shaft orientation plunger variable pump (6) and is reversed gear commutation to the second oil inlet (P2) of valve block assembly (3)
The third actuator port (A2) of solenoid valve (5) is connected to；The second control mouth (X2) of shaft orientation plunger variable pump (6) and the electricity that commutates that reverses gear
4th actuator port (B2) of magnet valve (5) is connected to.
8. a kind of crawler tractor automatic turning hydraulic system according to claim 1, it is characterised in that: described
Quantitative bent-axis piston motor (7) on be provided with the 7th actuator port (A4), the 8th actuator port (B4), third drain tap
(L3)；5th actuator port of the 7th actuator port (A4) and shaft orientation plunger variable pump (6) of quantitative bent-axis piston motor (7)
(A3) it is connected to；6th working oil of the 8th actuator port (B4) and shaft orientation plunger variable pump (6) of quantitative bent-axis piston motor (7)
Mouth (B3) connection；The third drain tap (L3) of quantitative bent-axis piston motor (7) and first drain tap of shaft orientation plunger variable pump (6)
(L1) it is connected to.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291547.4A CN109911011B (en) | 2019-04-12 | 2019-04-12 | Automatic steering hydraulic system of crawler tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291547.4A CN109911011B (en) | 2019-04-12 | 2019-04-12 | Automatic steering hydraulic system of crawler tractor |
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| Publication Number | Publication Date |
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| CN109911011A true CN109911011A (en) | 2019-06-21 |
| CN109911011B CN109911011B (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910291547.4A Active CN109911011B (en) | 2019-04-12 | 2019-04-12 | Automatic steering hydraulic system of crawler tractor |
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| Country | Link |
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| CN112253747A (en) * | 2020-10-29 | 2021-01-22 | 第一拖拉机股份有限公司 | Electric hydraulic control system for tractor |
| CN113232718A (en) * | 2021-04-27 | 2021-08-10 | 北京理工大学 | Manual-automatic integrated automatic steering system based on secondary planetary steering engine |
| CN112253747B (en) * | 2020-10-29 | 2024-05-28 | 第一拖拉机股份有限公司 | Electrohydraulic control system for tractor |
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| US20140358354A1 (en) * | 2013-05-30 | 2014-12-04 | Cnh America, Llc | Windrower autoguidance hydraulic steering interface |
| CN106184365A (en) * | 2016-08-30 | 2016-12-07 | 第拖拉机股份有限公司 | Endless-track vehicle steering control mechanism |
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| CN112253747A (en) * | 2020-10-29 | 2021-01-22 | 第一拖拉机股份有限公司 | Electric hydraulic control system for tractor |
| CN112253747B (en) * | 2020-10-29 | 2024-05-28 | 第一拖拉机股份有限公司 | Electrohydraulic control system for tractor |
| CN113232718A (en) * | 2021-04-27 | 2021-08-10 | 北京理工大学 | Manual-automatic integrated automatic steering system based on secondary planetary steering engine |
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| Publication number | Publication date |
|---|---|
| CN109911011B (en) | 2023-11-14 |
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