CN208931422U - A kind of electronic direction machine hydraulic system of wheeled tractor - Google Patents
A kind of electronic direction machine hydraulic system of wheeled tractor Download PDFInfo
- Publication number
- CN208931422U CN208931422U CN201821761215.5U CN201821761215U CN208931422U CN 208931422 U CN208931422 U CN 208931422U CN 201821761215 U CN201821761215 U CN 201821761215U CN 208931422 U CN208931422 U CN 208931422U
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- Prior art keywords
- directional control
- control valve
- steering
- solenoid directional
- oil
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- 239000002828 fuel tank Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 17
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 85
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Landscapes
- Guiding Agricultural Machines (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The utility model discloses a kind of electronic direction machine hydraulic systems of wheeled tractor, including steering pump, check valve, hydraulic steering gear, steering cylinder, main line overflow valve and steering wheel, the first solenoid directional control valve, the second solenoid directional control valve and three position four-way directional control valve are equipped between steering pump and steering cylinder, the first solenoid directional control valve is connected in parallel to hand-operated valve；The oil inlet P of first solenoid directional control valve and the oil outlet of steering pump connect, the oil outlet A of first solenoid directional control valve and the oil inlet of hydraulic steering gear connect, the oil outlet B of first solenoid directional control valve is connect with the oil inlet P of the second solenoid directional control valve, the oil outlet B of second solenoid directional control valve and the oil inlet P of three position four-way directional control valve connect, and two actuator ports of three position four-way directional control valve and two working chambers of steering cylinder are respectively communicated with.The utility model increases on the basis of former vehicle steering system from control loop, and improved tractor is simple and convenient there are two types of switching between driving mode and both of which.
Description
Technical field
The utility model relates to tractor technical field more particularly to a kind of electronic steering wheel hydraulic pressure systems of wheeled tractor
System.
Background technique
Tractor is essential mechanical equipment in agricultural production, can be used for ploughing, sow, applies fertilizer, transports.It is dilatory
Owner will be made of driving system, equipment system, steering system etc., and steering system is mainly hydraulic-driven.
New Orient 404D type tractor original vehicle steering system includes steering wheel, hydraulic steering gear, steering cylinder, fuel tank, overflows
Flow valve etc., attached drawing 1 is the former vehicle steering principle figure of tractor, and position is that hydraulic steering gear is in middle position in figure, at this time vehicle with
Straight line is travelled with certain certain deflection angle, and at this moment the two of steering cylinder working chamber is closed, and steering pump coming oil is passed through
Hydraulic fluid port on hydraulic steering gear directly flows back to fuel tank；When left-hand bend, hydraulic steering gear is gone to counterclockwise under the drive of steering wheel
Upper oil circuit position, steering pump coming oil enter the left side working chamber of steering cylinder by hydraulic steering gear oil duct, push piston
It is moved to right with piston rod, realizes that left steering, the oil liquid in the working chamber of the steering cylinder other side are flow back to through the oil duct on hydraulic steering gear
Fuel tank.When steering wheel stops turning to, the valve port that hydraulic steering gear is connect with steering cylinder is closed, and steering cylinder keeps existing
Position is constant, and the oil from steering pump directly flows back to fuel tank, and tractor continues steering state.When tractor right turn, liquid
Pressure diverter is in lower oil circuit position, and the course of work and above-mentioned left steering are just opposite.
The above process is both needed to drive hydraulic steering gear rotation to drive steering cylinder to be just able to achieve by operation steering wheel
It turns to, does not meet the requirement of modern agriculture, modern agriculture in order to reduce the labor intensity of operator, generally want by accurate operation
Tractor is asked to can be realized automatic Pilot in operation process, tractor does not need manual operation when working normally, only occurs
Manual intervention is just carried out when necessary situation.Therefore, it is necessary to be carried out to above-mentioned New Orient 404D type tractor original vehicle steering system
Transformation.
Summary of the invention
The utility model provides a kind of electronic steering wheel of wheeled tractor to solve shortcoming in the prior art
Hydraulic system increases on the basis of former vehicle steering system from control loop, and there are two types of driving modes for improved tractor, divides
Not Wei artificial steering pattern and auto-steering mode, and switch simple and convenient between both of which, ensure that the reliable of complete machine
Property.
The utility model is adopted the technical scheme that solve the above-mentioned problems, and it is electronic to provide a kind of wheeled tractor
Direction machine hydraulic system, including fuel tank, oil filter, steering pump, check valve, hydraulic steering gear, steering cylinder, main line overflow valve
And steering wheel, steering pump supply working oil from fuel tank oil suction and to steering cylinder, there are two working chambers for steering cylinder tool, hydraulic
Diverter is connect by turning-bar with steering wheel, and the first solenoid directional control valve, the second electricity are equipped between steering pump and steering cylinder
Magnetic reversal valve and three position four-way directional control valve, the first solenoid directional control valve and the second solenoid directional control valve are two-bit triplet reversal valve, are done
Road overflow valve is connected between the first solenoid directional control valve and fuel tank, is equipped with and the first electromagnetism between steering pump and hydraulic steering gear
The hand-operated valve that reversal valve is connected in parallel；The oil inlet P of first solenoid directional control valve and the oil outlet of steering pump connect, the first electromagnetism
The oil outlet A of reversal valve and the oil inlet of hydraulic steering gear connect, the oil outlet B and the second electromagnetic switch of the first solenoid directional control valve
The oil inlet P of valve connects, and the oil outlet A of the second solenoid directional control valve is connect by oil return circuit with fuel tank, the second solenoid directional control valve
Oil outlet B and three position four-way directional control valve oil inlet P connect, two actuator ports and steering cylinder of three position four-way directional control valve
Two working chambers be respectively communicated with, under middle position state, the oil inlet P of three position four-way directional control valve is connected to oil return inlet T.
Preferably, bidirectional relief valve is equipped between three position four-way directional control valve and steering cylinder.
Preferably, it is connected in series between the oil outlet A of the first solenoid directional control valve and the oil inlet of hydraulic steering gear unidirectional
Valve.
Preferably, the steering angle sensor turned to for detection direction disk is installed in turning-bar, steering angle sensor
Signal output end is connect with the signal input part of ECU unit.
By adopting the above technical scheme, the utility model has the advantage that
The utility model is the steering system transformation carried out based on the 404D type tractor of New Orient, remains former vehicle and turns
To system, on the basis of former vehicle steering system, increase from control loop.Therefore there are two types of drive mould for improved tractor
Formula, respectively artificial steering pattern and auto-steering mode, and switch simple and convenient between both of which, it ensure that complete machine
Reliability.
The both of which operation of the utility model ensure that the high reliability of tractor operation, and both of which operation is not done mutually
It relates to, conveniently free switching, the switching of both of which can change the flow direction of oil liquid by the on-off of the first solenoid directional control valve
To realize.Under auto-steering mode, when the first solenoid directional control valve failure cannot be switched to artificial steering pattern, open manual
Vavle switching ensure that tractor reliability to artificial steering pattern.
Bidirectional relief valve is equipped between the three position four-way directional control valve and steering cylinder of the utility model, when 3-position 4-way commutates
When valve is in middle position state, steering cylinder both ends oil circuit is in off state, when steering cylinder is by external load pressure wave
When dynamic, the side that the high side of pressure can be low by oil liquid feed pressure by bidirectional relief valve can two works of balanced steering cylinder
Make the pressure of chamber, effective protection steering cylinder.
Detailed description of the invention
Fig. 1 is the former vehicle steering principle figure of tractor；
Fig. 2 is the principles of the present invention schematic diagram.
Specific embodiment
As depicted in figs. 1 and 2, the electronic direction machine hydraulic system of a kind of wheeled tractor of the utility model, takes turns for making
Front frame 6 in formula tractor is rotated relative to Rear frame, including fuel tank 13, oil filter 12, steering pump 1, check valve 14, liquid
Press diverter 9, steering cylinder 7, main line overflow valve 11 and steering wheel 8, steering pump 1 is from 13 oil suction of fuel tank and to steering cylinder 7
Working oil is supplied, there are two working chambers for the tool of steering cylinder 7, and the piston rod of working oil control steering cylinder 7 is flexible to make 6 phase of front frame
Rear frame is rotated, hydraulic steering gear 9 is connect by turning-bar 15 with steering wheel 8, is equipped in turning-bar 15 for detecting
The steering angle sensor that steering wheel 8 turns to, the signal output end of steering angle sensor are connect with the signal input part of ECU unit.
Steering wheel 8 turns left or right-hand rotation can all be diverted angle transducer and detect, so that ECU unit be made to issue correct steering order.Turn
It is existing conventional equipment to angle transducer, ECU unit is the prior art, is not shown in figure.
ECU unit, that is, vehicle electronic control unit, also known as " car running computer ", " vehicle-mounted computer " etc., belong to the prior art, from
Say to be automobile specified microcomputerized controller as common computer in purposes, is connect by microprocessor, memory, input/output
Mouthful, the large scale integrated circuits composition such as analog-digital converter and shaping, driving, there is interface, the field control office of unified standard
Domain network (CAN) technology and International standardization network communication protocol (for the serial data communication of agricultural vehicle and equipment and
Control, International Organization for standardization have formulated the ISO11783 communication standard based on CAN2.0B), specifically repeat no more.
The first solenoid directional control valve 2, the second solenoid directional control valve 3 and 3-position 4-way are equipped between steering pump 1 and steering cylinder 7
Reversal valve 4, the first solenoid directional control valve 2 and the second solenoid directional control valve 3 are two-bit triplet reversal valve, and main line overflow valve 11 is connected to
Between first solenoid directional control valve 2 and fuel tank 13, main line overflow valve 11 can be between stable turning oil pump 1 and the first solenoid directional control valve 2
Oil circuit pressure, rise level pressure overflow, pressure stabilizing, system unloaded and safeguard protection effect, between steering pump 1 and hydraulic steering gear 9
Equipped with the hand-operated valve 10 being connected in parallel with the first solenoid directional control valve 2.
First solenoid directional control valve 2, the second solenoid directional control valve 3 and three position four-way directional control valve 4 are electrically connected with ECU unit respectively.
The signal that ECU unit is fed back by steering angle sensor controls the first solenoid directional control valve 2, the second solenoid directional control valve 3 and three four
Logical reversal valve 4 obtains electric and power-off.
Two-bit triplet reversal valve has an oil inlet P, oil outlet A and oil outlet B, and three position four-way directional control valve 4 has one
A oil inlet P, an oil return inlet T and two actuator ports simultaneously have left-hand rotation working position, right-hand rotation working position and middle position.
The oil inlet P of first solenoid directional control valve 2 is connect with the oil outlet of steering pump 1, the first solenoid directional control valve 2 it is fuel-displaced
Mouthful A is connect with the oil inlet of hydraulic steering gear 9, the oil inlet of the oil outlet A of the first solenoid directional control valve 2 and hydraulic steering gear 9 it
Between be connected in series with the oil inlet of check valve 14(check valve 14 and connect with the oil outlet A of the first solenoid directional control valve 2, check valve 14
Oil outlet connect with the oil inlet of hydraulic steering gear 9)；The oil outlet B of first solenoid directional control valve 2 and the second solenoid directional control valve 3
Oil inlet P connection, the oil outlet A of the second solenoid directional control valve 3 connect by oil return circuit with fuel tank 13, the second solenoid directional control valve
3 oil outlet B is connect with the oil inlet P of three position four-way directional control valve 4, two actuator ports of three position four-way directional control valve 4 and steering
Two working chambers of oil cylinder 7 are respectively communicated with, and under middle position state, the oil inlet P of three position four-way directional control valve 4 is connected to oil return inlet T.
Bidirectional relief valve 5 is equipped between three position four-way directional control valve 4 and steering cylinder 7, there are two work for the tool of bidirectional relief valve 5
One actuator port of hydraulic fluid port, bidirectional relief valve 5 is connected to the oil feeding line between three position four-way directional control valve 4 and steering cylinder 7
On, another actuator port of bidirectional relief valve 5 is connected to the oil return circuit between three position four-way directional control valve 4 and steering cylinder 7
On.
The utility model is the steering system transformation carried out based on the 404D type tractor of New Orient, remains former vehicle and turns
To system, on the basis of former vehicle steering system, increase from control loop.Therefore there are two types of drive mould for improved tractor
Formula, respectively artificial steering pattern and auto-steering mode, and switch simple and convenient between both of which, it ensure that complete machine
Reliability.
The utility model has auto-steering mode and artificial steering pattern, and the switching of both of which is by the first electromagnetic switch
The on-off of valve 2 changes the flow direction of oil liquid to realize.
Auto-steering mode: under auto-steering mode, hand-operated valve 10 is in close state, and the first solenoid directional control valve 2 must be electric,
The oil inlet P of first solenoid directional control valve 2 is connected to the oil outlet B of the first solenoid directional control valve 2, and the oil liquid come out from fuel tank 13 passes through
First solenoid directional control valve 2 flows to the second solenoid directional control valve 3.
When turning-bar 15 is without operation, the second solenoid directional control valve 3 is in off-position, the oil inlet P of the second solenoid directional control valve 3
It is connected to the oil outlet A of the second solenoid directional control valve 3, oil liquid directly through 3 oil return box 13 of the second solenoid directional control valve, reduces energy damage
It loses, while reducing Hydraulic System Fever amount.
When turning-bar 15 turns to the left, the second solenoid directional control valve 3 it is electric, three position four-way directional control valve 4 also it is electric and make three
Position and four-way reversing valve 4 is in left-hand rotation working position, the oil outlet of the oil inlet P of the second solenoid directional control valve 3 and the second solenoid directional control valve 3
B connection, oil liquid pass through the first solenoid directional control valve 2, the second solenoid directional control valve 3, and three position four-way directional control valve 4 flows into steering cylinder 7
Left side working chamber pushes piston and piston rod to move right, and piston rod drives deflecting roller to turn to the left and realizes left-hand rotation movement.
When turning-bar 15 turns to the right, the second solenoid directional control valve 3 it is electric, three position four-way directional control valve 4 also it is electric and make three
Position and four-way reversing valve 4 is in right-hand rotation working position, the oil outlet of the oil inlet P of the second solenoid directional control valve 3 and the second solenoid directional control valve 3
B connection, oil liquid pass through the first solenoid directional control valve 2, the second solenoid directional control valve 3, and three position four-way directional control valve 4 is flowed into steering cylinder 7
Right side working chamber push piston and piston rod to move downward, piston rod drives deflecting roller to turn to the right and realizes that right-hand rotation acts.
Second solenoid directional control valve 3 is linkage design with three position four-way directional control valve 4, when three position four-way directional control valve 4 it is electric when, nothing
Punish when left-hand rotation working position or right-hand rotation working position, the second solenoid directional control valve 3 all it is electric, when three position four-way directional control valve 4 is in
When middle position, the power-off of the second solenoid directional control valve 3, oil liquid is directly through 3 oil return box 13 of the second solenoid directional control valve.
Design has bidirectional relief valve 5 between 7 both ends oil circuit of steering cylinder, when three position four-way directional control valve 4 is in middle position state
When, 7 both ends oil circuit of steering cylinder is in off state, and when steering cylinder 7 is by external load pressure oscillation, pressure is high
Side can be low by oil liquid feed pressure by bidirectional relief valve 5 side, can balanced 7 two working chambers of steering cylinder pressure,
Effective protection steering cylinder 7.
Artificial steering pattern: when the power-off of the first solenoid directional control valve 2, auto-steering mode failures even turns to mould into artificial
Formula, the oil inlet P of the first solenoid directional control valve 2 are connected to the oil outlet A of the first solenoid directional control valve 2, and oil liquid is changed by the first electromagnetism
It is flowed into the hydraulic system of former vehicle to valve 2, is operated by steering wheel 8 and drives the rotation of hydraulic steering gear 9 to drive steering cylinder 7
Steering can be realized.In the present invention, oil liquid is diverted oil pump 1 from fuel tank 13 and is sucked out and is sent to the first solenoid directional control valve 2,
One of working chamber of steering cylinder 7, another work of steering cylinder 7 are supplied to via check valve 14, hydraulic steering gear 9 again
Intracavitary oil liquid is returned through hydraulic steering gear 9 toward fuel tank 13.
The utility model has artificial steering pattern and auto-steering mode, and both of which operation guarantees tractor operation
High reliability, both of which operation is non-interference, can conveniently free switching, the switching of both of which is by the first electromagnetism
The on-off of reversal valve 2 changes the flow direction of oil liquid to realize.Under auto-steering mode, when 2 failure of the first solenoid directional control valve cannot
When being switched to artificial steering pattern, opens hand-operated valve 10 and be switched to artificial steering pattern, ensure that tractor reliability.
The oil filter 12, steering pump 1, hydraulic steering gear 9, steering cylinder 7 and steering angle sensor are existing normal
Device is advised, steering angle sensor model can be selected KMA199 type, specifically repeat no more.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (4)
1. a kind of electronic direction machine hydraulic system of wheeled tractor, including fuel tank, oil filter, steering pump, check valve, hydraulic rotation
To device, steering cylinder, main line overflow valve and steering wheel, steering pump supplies working oil from fuel tank oil suction and to steering cylinder, turns
To oil cylinder tool there are two working chamber, hydraulic steering gear connect by turning-bar with steering wheel, it is characterised in that: steering pump and turn
To between oil cylinder be equipped with the first solenoid directional control valve, the second solenoid directional control valve and three position four-way directional control valve, the first solenoid directional control valve and
Second solenoid directional control valve is two-bit triplet reversal valve, and main line overflow valve is connected between the first solenoid directional control valve and fuel tank, is turned
To being equipped with the hand-operated valve that is connected in parallel with the first solenoid directional control valve between oil pump and hydraulic steering gear；
The oil inlet P of first solenoid directional control valve and the oil outlet of steering pump connect, the oil outlet A and liquid of the first solenoid directional control valve
The oil inlet connection of diverter is pressed, the oil outlet B of the first solenoid directional control valve is connect with the oil inlet P of the second solenoid directional control valve, the
The oil outlet A of two solenoid directional control valves is connect by oil return circuit with fuel tank, the oil outlet B and 3-position 4-way of the second solenoid directional control valve
The oil inlet P of reversal valve connects, and two actuator ports of three position four-way directional control valve and two working chambers of steering cylinder connect respectively
Logical, under middle position state, the oil inlet P of three position four-way directional control valve is connected to oil return inlet T.
2. the electronic direction machine hydraulic system of a kind of wheeled tractor according to claim 1, it is characterised in that: 3-position 4-way
Bidirectional relief valve is equipped between reversal valve and steering cylinder.
3. the electronic direction machine hydraulic system of a kind of wheeled tractor according to claim 1, it is characterised in that: the first electromagnetism
Check valve is connected in series between the oil outlet A of reversal valve and the oil inlet of hydraulic steering gear.
4. the electronic direction machine hydraulic system of a kind of wheeled tractor according to claim 1, it is characterised in that: in turning-bar
The steering angle sensor turned to for detection direction disk, the signal output end of steering angle sensor and the letter of ECU unit are installed
The connection of number input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821761215.5U CN208931422U (en) | 2018-10-29 | 2018-10-29 | A kind of electronic direction machine hydraulic system of wheeled tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821761215.5U CN208931422U (en) | 2018-10-29 | 2018-10-29 | A kind of electronic direction machine hydraulic system of wheeled tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208931422U true CN208931422U (en) | 2019-06-04 |
Family
ID=66726329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821761215.5U Expired - Fee Related CN208931422U (en) | 2018-10-29 | 2018-10-29 | A kind of electronic direction machine hydraulic system of wheeled tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208931422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744290A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Hydraulic power-assisted steering system and vehicle |
-
2018
- 2018-10-29 CN CN201821761215.5U patent/CN208931422U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744290A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Hydraulic power-assisted steering system and vehicle |
| CN112744290B (en) * | 2019-10-31 | 2022-05-13 | 比亚迪股份有限公司 | Hydraulic power-assisted steering system and vehicle |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 |