CN109733473A - A kind of vehicle active safe driving steering system - Google Patents
A kind of vehicle active safe driving steering system Download PDFInfo
- Publication number
- CN109733473A CN109733473A CN201910130066.5A CN201910130066A CN109733473A CN 109733473 A CN109733473 A CN 109733473A CN 201910130066 A CN201910130066 A CN 201910130066A CN 109733473 A CN109733473 A CN 109733473A
- Authority
- CN
- China
- Prior art keywords
- oil
- inlet
- valve
- steering
- oil outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Power Steering Mechanism (AREA)
Abstract
The present invention discloses a kind of vehicle active safe driving steering system, including pump machanism, the first proportional reversing valve, the first steering mechanism, the second steering mechanism and steering cylinder, first proportional reversing valve is equipped with oil inlet P, oil outlet CF, EF and control port Ls, oil outlet CF, EF are separately connected the first steering mechanism and the second steering mechanism, oil outlet CF connection control port Ls；First steering mechanism is equipped with oil inlet P 1, oil return inlet T 1 and actuator port R1, L1, oil inlet P 1 and connect with oil outlet CF, and oil return inlet T 1 is connected to fuel tank, and oil return inlet T 1 is connected to control port Ls, and actuator port R1, L1 connect steering cylinder；Second steering mechanism is equipped with oil inlet P 2, oil return inlet T 2 and actuator port R2, L2, oil inlet P 2 and connect with oil outlet EF, and oil return inlet T 2 connects fuel tank, and actuator port R2, L2 connect steering cylinder.The present invention can adjust pump output flow according to real-time working condition, protect each other equipped with three sets of steering mechanism's free switchings, guarantee safety and stablize.
Description
Technical field
The present invention relates to Vehicle Engineering technical fields, and in particular to a kind of vehicle active safe driving steering system.
Background technique
Automatic driving vehicle is one of the important development direction in automobile industry future, in recent years technical field of vehicle by
Concern.Automatic driving vehicle integrates the multidisciplinary technology such as visual perception, artificial intelligence, planning control, it not only search and rescue,
Rescue is scouted etc. and to have important application value in hot missions, and for alleviating the congested in traffic, side such as improve traffic safety
There are very big realistic meaning and development potentiality in face.Currently, unmanned technology, pole are all being studied energetically by many countries in the world
The earth has pushed the development of unmanned technology.
Vehicular turn generally passes through steering pump by oil suction in fuel tank, then by reversal valve and diverter control steering cylinder into
Oil is completed.In unmanned technology, autosteerer is the very important part of automatic driving vehicle, it can be autonomous
Ground controls vehicle steering angle, so that desirably track travels vehicle.
Therefore, the steering accuracy and reliability of automatic driving vehicle is very crucial and the key of unmanned technology.
The unmanned steering system of the prior art has the following deficiencies:
1, the power of steering pump can not be adjusted, according to the real-time working condition of steering cylinder so as to cause excess traffic entrance
Inside diverter, flow loss is caused, does not meet energy-saving and emission-reduction requirement；
2, diverter, no emergency use steering mechanism, in steering mechanism's failure are controlled only by single steering mechanism
When, it can not guarantee normal vehicle operation quickly through spare mechanism, safety and stability is not high；
3, Unmanned Systems can not quickly switch between manual drive and automatic Pilot, not can guarantee the excellent of manual drive
First grade.
Therefore, it is very necessary to develop a kind of novel vehicle drive steering system.
Summary of the invention
The purpose of the present invention is to provide a kind of vehicle active safe driving steering system is developed, which being capable of root
The output flow of steering pump is adjusted according to the real-time working condition of steering cylinder, while can freely between manual steering and auto-steering
Switching, and two sets of automatic changeovers that can automatically switch are provided with, it protects each other, guarantees the safety of unmanned steering.
To achieve the goals above, the technical scheme is that
A kind of vehicle active safe driving steering system, including pump machanism, the first proportional reversing valve, the first steering mechanism,
Second steering mechanism and steering cylinder, first proportional reversing valve are provided with oil inlet P, oil outlet CE, EF and control port
Ls, the pump machanism oil outlet are connected to the oil inlet P, described oil outlet CF, EF be respectively connected to the first steering mechanism and
Second steering mechanism, the oil outlet CF also pass through guide's oil circuit be connected to the control port Ls push spool to increase into
Fluid path opens ratio between hydraulic fluid port P and oil outlet EF；First steering mechanism is equipped with oil inlet P 1, oil return inlet T 1 and working oil
Mouth R1, L1, the oil inlet P 1 are connect with the oil outlet CF, and the oil return inlet T 1 is connected to fuel tank, and oil return inlet T 1 is also logical
It crosses guide's oil circuit and is connected to the control port Ls promotion spool of first proportional reversing valve to increase oil inlet P and oil outlet
Ratio, the oil return inlet T 1 and the more hydraulic size of oil outlet CF are opened between CF to control the first proportional reversing valve spool
Position, described actuator port R1, L1 are connected to the steering cylinder；Second steering mechanism is equipped with oil inlet P 2, oil return opening
T2 and actuator port R2, L2, the oil inlet P 2 are connect with the oil outlet EF, and the oil return inlet T 2 is connected to fuel tank, institute
It states actuator port R2, L2 and is connected to the steering cylinder.
Compared with prior art, the beneficial effects of the present invention are:
1, the first proportional reversing valve of the invention is provided with control port Ls, the oil return inlet T 1 of the first steering mechanism and first
The oil outlet CE of proportional reversing valve passes through guide's oil circuit and is connected to control port Ls, and oil return inlet T 1 is hydraulic to represent steering cylinder reality
When operating condition, oil outlet CE it is hydraulic represent enter first steering mechanism's internal oil passages it is hydraulic, the two compare adjustment the first ratio commutation
Valve core position is adjusted into the first turning machine according to real-time working condition to guarantee 1 hydro-cushion of oil outlet CE and oil return inlet T
Structure internal oil flow reduces flow wave power and takes, energy conservation and environmental protection；
2, for the present invention when first steering mechanism's failure, for oil return inlet T 1 without hydraulic, oil outlet CE is hydraulic to pass through control port
Ls pushes spool, opens fluid path between oil inlet P and oil outlet EF, to open the second steering mechanism；If the first turning machine at this time
Structure restores, and steering cylinder inner fluid passes through 1 oil return of oil return inlet T of the first steering mechanism, to push valve by control port LS
Core, fluid path between opening oil inlet P and oil outlet CF, the first steering mechanism of completion and the second steering mechanism are switched fast, and guarantee
Steering system the operation is stable, vehicle driving safety.
Further, first steering mechanism includes commutator, rotary valve and driving motor, the oil inlet P 1, oil return
Mouth T1 and actuator port R1, L1 are arranged on the commutator, and the rotary valve is changed with steering wheel for vehicle linkage for controlling
Ratio is opened to device, the driving motor opens ratio for commutator described in Electronic control, and described actuator port R1, L1 are also logical
It crosses overflow valve and is connected to the oil return inlet T 1.
By using above scheme, rotary valve and steering wheel for vehicle link, and open ratio for manually controlling commutator, thus
Complete manual steering；Driving motor opens ratio for Electronic control commutator, completes auto-steering by control electric signal,
The two can be switched over quickly, realize that auto-manual turns to.
Further, second steering mechanism includes the second proportional reversing valve and is used to control the second proportional reversing valve
The electric ratio coil of unlatching ratio, the oil inlet P 2, oil return inlet T 2 and actuator port R2, L2 are arranged at second ratio
On example reversal valve, described actuator port R2, L2 are connected to the steering cylinder by hydraulic lock, and the oil return inlet T 2 is connected to oil
Case.
By using above scheme, the second steering mechanism controls electric ratio coil by electric signal, thus the second ratio of control
The unlatching ratio of example reversal valve completes auto-steering, when hydraulic lock is for avoiding the first steering mechanism from working, oil in steering cylinder
Liquid is flowed out by the second steering mechanism, influences the accuracy of control port Ls adjusting spool position.
Further, second steering mechanism further includes safety valve and pressure maintaining valve, described in the pressure maintaining valve both ends connection
Oil inlet P 2 and fuel tank, and pressure maintaining valve is equipped with control mouth Ls1, the safety valve connects the oil return inlet T 2 and the control mouth
Ls1。
By using above scheme, when 2 oil liquid of oil return inlet T is excessive, it is hydraulic to need to reduce oil inlet P 2 in time, avoids turning to
Oil cylinder internal pressure is excessively high to cause security risk, and oil return inlet T 2 controls pressure maintaining valve by safety valve and opens, and oil inlet P 2 is directly logical
It crosses pressure maintaining valve and returns to fuel tank, guarantee equipment safety operation.
Further, second steering mechanism further includes shuttle valve, and two oil inlets of the shuttle valve are separately connected working oil
Mouth R2, L2, oil outlet are connected to the control mouth Ls1.
By using above scheme, shuttle valve compares that actuator port R2, L2 are hydraulic, and oil outlet is hydraulic represents real-time liquid in oil cylinder
Pressure, oil outlet is connected to control mouth Ls1, thus the unlatching ratio of real-time control pressure maintaining valve, so that the hydraulic of oil inlet P 2 is controlled,
Guarantee oil inlet P 2 it is hydraulic with oil cylinder in hydraulic matching in real time.
Further, the pump machanism includes that the main pump being arranged in parallel and electric drive pump, the main pump and electric drive
The oil outlet of pump is connect with the oil inlet P, and is equipped with check valve between main pump and electric drive pump and oil inlet P.
By using above scheme, it is provided with main pump and electric drive pump two parallel pumps, in steering system in main pump failure
When, it is pumped by electric drive guarantee that steering system operates normally in time, safety and stability is improved, when check valve prevents double pump
Oil liquid is flow backwards.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
It is as shown in the figure:
1, main pump；
2, electric drive pumps；
3, check valve；
4, the first proportional reversing valve；
5, commutator；
6, rotary valve；
7, driving motor；
8, the second proportional reversing valve；
9, electric ratio coil；
10, hydraulic lock；
11, steering cylinder；
12, safety valve；
13, pressure maintaining valve；
14, fuel tank；
15, relief valve；
16, overflow valve；
17, shuttle valve.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply relatively important
Property or implicitly indicate the quantity of indicated technical characteristic.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
As shown in Figure 1, a kind of vehicle active safe driving steering system provided in this embodiment, including pump machanism, first
Proportional reversing valve 4, the first steering mechanism, the second steering mechanism and steering cylinder 11.
First proportional reversing valve 4 is provided with oil inlet P, oil outlet CE, EF and control port Ls.
Pump machanism include the main pump 1 being arranged in parallel and electric drive pump 2, main pump 1 and electric drive pump 2 oil outlet with
Oil inlet P connection, and check valve 3 is equipped between main pump 1 and electric drive pump 2 and oil inlet P.In steering system in 1 event of main pump
When barrier, guarantee that steering system operates normally by electric drive pump 2 in time, improve safety and stability, check valve 3 prevents double
Oil liquid is flow backwards when pump.
Oil outlet CF, EF are respectively connected to the first steering mechanism and the second steering mechanism, and oil outlet CF also passes through guide oil
Road is connected to control port Ls and pushes spool to increase fluid path between oil inlet P and oil outlet EF and open ratio, control port Ls
Fuel tank 14 is connected to by relief valve 15.
First steering mechanism includes commutator 5, rotary valve 6 and driving motor 7, and commutator 5 is equipped with oil inlet P 1, oil return inlet T 1
And actuator port R1, L1, oil inlet P 1 are connect with oil outlet CF, oil return inlet T 1 is connected to fuel tank 14, and oil return inlet T 1 is also logical
It crosses guide's oil circuit and is connected to the control port Ls promotion spool of the first proportional reversing valve 4 to increase oil inlet P and oil outlet CF
Between fluid path open ratio, oil return inlet T 1 and the more hydraulic size of oil outlet CF to control 4 spool position of the first proportional reversing valve,
Actuator port R1, L1 are connected to steering cylinder 11.
Rotary valve 6 and steering wheel for vehicle link for controlling 5 unlatching ratio of commutator, and driving motor 7 is changed for Electronic control
Ratio is opened to device 5, actuator port R1, L1 are connected to oil return inlet T 1 by overflow valve 16.
Rotary valve 6 and steering wheel for vehicle link, for manually controlling 5 unlatching ratio of commutator, to complete manual steering；It drives
Dynamic motor 7 opens ratio for Electronic control commutator 5, completes auto-steering by control electric signal, the two can be quick
It switches over, realizes that auto-manual turns to.
Second steering mechanism includes the second proportional reversing valve 8 and opens ratio for controlling the second proportional reversing valve 8
Electric ratio coil 9.
Second proportional reversing valve 8 is equipped with oil inlet P 2, oil return inlet T 2 and actuator port R2, L2, oil inlet P 2 with it is fuel-displaced
Mouth EF connection, oil return inlet T 2 are connected to fuel tank 14, and actuator port R2, L2 are connected to steering cylinder 11 by hydraulic lock 10.Second
Steering mechanism controls electric ratio coil 9 by electric signal, so that the unlatching ratio of the second proportional reversing valve 8 of control, is completed automatic
It turning to, when hydraulic lock 10 is for avoiding the first steering mechanism from working, 11 inner fluid of steering cylinder is flowed out by the second steering mechanism,
Influence the accuracy of control port Ls adjusting spool position.
Second steering mechanism further includes safety valve 12 and pressure maintaining valve 13, and 13 both ends of pressure maintaining valve connect oil inlet P 2 and fuel tank
14, and pressure maintaining valve 13 is equipped with control mouth Ls1, safety valve 12 connects oil return opening T2 and control mouth Ls1.
When 2 oil liquid of oil return inlet T is excessive, it is hydraulic to need to reduce oil inlet P 2 in time, avoids 11 internal pressure mistake of steering cylinder
Height causes security risk, and oil return inlet T 2 controls pressure maintaining valve 13 by safety valve 12 and opens, and oil inlet P 2 directly passes through pressure maintaining valve 13
Fuel tank 14 is returned to, guarantees equipment safety operation.
Second steering mechanism further includes shuttle valve 17, and two oil inlets of shuttle valve 17 are separately connected actuator port R2, L2, oil outlet
It is connected to control mouth Ls1.
It is hydraulic that shuttle valve 17 compares actuator port R2, L2, and oil outlet is hydraulic to be represented hydraulic in real time in oil cylinder, and oil outlet is connected to
Control mouth Ls1, the unlatching ratio of real-time control pressure maintaining valve, to control the hydraulic of oil inlet P 2, guarantee oil inlet P 2 it is hydraulic with
Real-time hydraulic matching in oil cylinder.
First proportional reversing valve 4 of the invention is provided with control port Ls, the oil return inlet T 1 of the first steering mechanism and first
The oil outlet CE of proportional reversing valve 4 passes through guide's oil circuit and is connected to control port Ls, and oil return inlet T 1 is hydraulic to represent steering cylinder
11 real-time working conditions, hydraulic represent of oil outlet CE enter first steering mechanism's internal oil flow, and the two compares the first ratio of adjustment
4 spool position of reversal valve is adjusted into first turn according to real-time working condition to guarantee 1 hydro-cushion of oil outlet CE and oil return inlet T
To in-house oil liquid flow, reduces flow wave power and take, energy conservation and environmental protection；
For the present invention when first steering mechanism's failure, for oil return inlet T 1 without hydraulic, oil outlet CE is hydraulic to pass through control port Ls
Spool is pushed, so that fluid path between oil inlet P and oil outlet EF is opened, to open the second steering mechanism；If first turning at this time
Mechanism restores, and 11 inner fluid of steering cylinder passes through 1 oil return of oil return inlet T of the first steering mechanism, to be pushed away by control port LS
Movable valve plug, fluid path between opening oil inlet P and oil outlet CF, the first steering mechanism of completion and the second steering mechanism are switched fast,
Guarantee steering system the operation is stable, vehicle driving safety.
In specification of the invention, numerous specific details are set forth.It is to be appreciated, however, that the embodiment of the present invention can be with
It practices without these specific details.In some instances, well known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this specification.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (6)
1. a kind of vehicle active safe driving steering system, which is characterized in that including pump machanism, the first proportional reversing valve, first
Steering mechanism, the second steering mechanism and steering cylinder, first proportional reversing valve be provided with oil inlet P, oil outlet CE, EF and
Control port Ls, the pump machanism oil outlet are connected to the oil inlet P, and described oil outlet CF, EF are respectively connected to first turn
To mechanism and the second steering mechanism, the oil outlet CF also pass through guide's oil circuit be connected to the control port Ls push spool from
And increases fluid path between oil inlet P and oil outlet EF and open ratio；First steering mechanism be equipped with oil inlet P 1, oil return inlet T 1 with
And actuator port R1, L1, the oil inlet P 1 are connect with the oil outlet CF, the oil return inlet T 1 is connected to fuel tank, and oil return
Mouth T1 also passes through guide's oil circuit and is connected to the control port Ls promotion spool of first proportional reversing valve to increase oil inlet P
Ratio, the oil return inlet T 1 and the more hydraulic size of oil outlet CF is opened between oil outlet CF to change to control first ratio
To valve core position, described actuator port R1, L1 are connected to the steering cylinder；Second steering mechanism is equipped with oil inlet
P2, oil return inlet T 2 and actuator port R2, L2, the oil inlet P 2 are connect with the oil outlet EF, and the oil return inlet T 2 connects
To fuel tank, described actuator port R2, L2 are connected to the steering cylinder.
2. a kind of vehicle active safe driving steering system according to claim 1, which is characterized in that described first turns to
Mechanism includes commutator, rotary valve and driving motor, and the oil inlet P 1, oil return inlet T 1 and actuator port R1, L1 are arranged at
On the commutator, the rotary valve and steering wheel for vehicle linkage are used for for controlling commutator unlatching ratio, the driving motor
Commutator described in Electronic control opens ratio, and described actuator port R1, L1 also pass through overflow valve and be connected to the oil return inlet T 1.
3. a kind of vehicle active safe driving steering system according to claim 1, which is characterized in that described second turns to
Mechanism includes the second proportional reversing valve and opens the electric ratio coil of ratio, the oil inlet for controlling the second proportional reversing valve
Mouth P2, oil return inlet T 2 and actuator port R2, L2 are arranged on second proportional reversing valve, described actuator port R2, L2
It is connected to the steering cylinder by hydraulic lock, the oil return inlet T 2 is connected to fuel tank.
4. a kind of vehicle active safe driving steering system according to claim 3, which is characterized in that described second turns to
Mechanism further includes safety valve and pressure maintaining valve, and the pressure maintaining valve both ends connect the oil inlet P 2 and fuel tank, and pressure maintaining valve is equipped with control
Donsole Ls1, the safety valve connect the oil return inlet T 2 and the control mouth Ls1.
5. a kind of vehicle active safe driving steering system according to claim 4, which is characterized in that described second turns to
Mechanism further includes shuttle valve, and two oil inlets of the shuttle valve are separately connected actuator port R2, L2, and oil outlet is connected to the control mouth
Ls1。
6. a kind of vehicle active safe driving steering system according to any one of claims 1 to 5, which is characterized in that described
Pump machanism include the main pump being arranged in parallel and electric drive pump, the main pump and electric drive pump oil outlet with the oil inlet
Mouth P connection, and check valve is equipped between main pump and electric drive pump and oil inlet P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130066.5A CN109733473A (en) | 2019-02-21 | 2019-02-21 | A kind of vehicle active safe driving steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130066.5A CN109733473A (en) | 2019-02-21 | 2019-02-21 | A kind of vehicle active safe driving steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109733473A true CN109733473A (en) | 2019-05-10 |
Family
ID=66367998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910130066.5A Pending CN109733473A (en) | 2019-02-21 | 2019-02-21 | A kind of vehicle active safe driving steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109733473A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000046003A (en) * | 1998-07-24 | 2000-02-15 | Toyota Autom Loom Works Ltd | Vehicular hydraulic circuit and vehicle |
| CN102001435A (en) * | 2010-10-26 | 2011-04-06 | 广西梧州运龙港船机械制造有限公司 | Marine hydraulic steering engine |
| CN102748335A (en) * | 2012-07-02 | 2012-10-24 | 三一重型装备有限公司 | Hydraulic system and heading machine |
| CN102935861A (en) * | 2012-12-10 | 2013-02-20 | 中联重科股份有限公司 | Multi-axle vehicle and steering control system and steering control method thereof |
| CN203113417U (en) * | 2012-12-28 | 2013-08-07 | 龙工(上海)机械制造有限公司 | Univariate hydraulic system of loading machine |
| CN104481958A (en) * | 2014-11-10 | 2015-04-01 | 广西柳工机械股份有限公司 | Separating/ combining selecting functional hydraulic control valve and fixed/ variable flow hydraulic system of loading machine |
| CN106481605A (en) * | 2016-12-13 | 2017-03-08 | 三汽车制造有限公司 | A kind of road roller hydraulic system and road roller |
| CN107351912A (en) * | 2017-07-12 | 2017-11-17 | 徐工集团工程机械股份有限公司 | A kind of electric hydraulic steering system and paver |
-
2019
- 2019-02-21 CN CN201910130066.5A patent/CN109733473A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000046003A (en) * | 1998-07-24 | 2000-02-15 | Toyota Autom Loom Works Ltd | Vehicular hydraulic circuit and vehicle |
| CN102001435A (en) * | 2010-10-26 | 2011-04-06 | 广西梧州运龙港船机械制造有限公司 | Marine hydraulic steering engine |
| CN102748335A (en) * | 2012-07-02 | 2012-10-24 | 三一重型装备有限公司 | Hydraulic system and heading machine |
| CN102935861A (en) * | 2012-12-10 | 2013-02-20 | 中联重科股份有限公司 | Multi-axle vehicle and steering control system and steering control method thereof |
| CN203113417U (en) * | 2012-12-28 | 2013-08-07 | 龙工(上海)机械制造有限公司 | Univariate hydraulic system of loading machine |
| CN104481958A (en) * | 2014-11-10 | 2015-04-01 | 广西柳工机械股份有限公司 | Separating/ combining selecting functional hydraulic control valve and fixed/ variable flow hydraulic system of loading machine |
| CN106481605A (en) * | 2016-12-13 | 2017-03-08 | 三汽车制造有限公司 | A kind of road roller hydraulic system and road roller |
| CN107351912A (en) * | 2017-07-12 | 2017-11-17 | 徐工集团工程机械股份有限公司 | A kind of electric hydraulic steering system and paver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104554432B (en) | Engineering machine steer-by-wire system | |
| CN202827716U (en) | Steering electro-hydraulic control system for remote-control loader | |
| CN106032261A (en) | Tension control device of high-power hydraulic winch | |
| CN102951198B (en) | A kind of vehicle and fluid-link steering drive system | |
| CN102278124A (en) | Energy-saving hydraulic shield propulsion system | |
| CN104863914B (en) | A kind of electro-hydraulic joint control converging valve | |
| CN113060209A (en) | Electro-hydraulic steering system for articulated trackless vehicle and articulated trackless vehicle | |
| CN209553296U (en) | A kind of vehicle active safe driving steering system | |
| CN109733473A (en) | A kind of vehicle active safe driving steering system | |
| CN104912136B (en) | A kind of excavator and its Hydraulic slewing system | |
| CN207111558U (en) | spillway hydraulic hoist system with emergency function | |
| CN209634555U (en) | A kind of automobile energy-saving steering system | |
| CN209096812U (en) | A kind of unmanned mine car steering system | |
| WO2024036970A1 (en) | Micro-angle stepping control method for hydraulic motor | |
| CN105015316A (en) | Hydraulic hybrid power transmission system with self-adaption switching function | |
| CN105275900B (en) | Fluid machine | |
| CN209510751U (en) | Combined automobile-used directive wheel hydraulic system and equipment | |
| CN205779966U (en) | RH steel ladle jacking hydraulic system | |
| CN105134675B (en) | A kind of hybrid power system of spraying machine pumping mechanism | |
| CN207935183U (en) | A kind of hydraulic energy-accumulating type wind power generating set | |
| CN104358749B (en) | Energy recovery and utilization system for movable arm potential energy | |
| CN105383675A (en) | EHA-VPVM drive steering engine system | |
| CN206397839U (en) | Travelling control valve group, hydraulic closed running gear and aerial working platform vehicle | |
| CN106870482B (en) | The vibration hydraulic system of cement pavement resonance rock crushing plant | |
| CN207064214U (en) | A kind of double-flow pump group and its fluid control systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |