CN104210541B - Emergency vehicle steering and wheeled crane - Google Patents
Emergency vehicle steering and wheeled crane Download PDFInfo
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- CN104210541B CN104210541B CN201410423911.5A CN201410423911A CN104210541B CN 104210541 B CN104210541 B CN 104210541B CN 201410423911 A CN201410423911 A CN 201410423911A CN 104210541 B CN104210541 B CN 104210541B
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- steering
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- vehicle steering
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Abstract
The invention discloses a kind of emergency vehicle steering and wheeled crane.This emergency vehicle steering includes hydraulic pressure assisted steering device, described hydraulic pressure assisted steering device includes steering actuation cylinder and for providing the power assistance pump for steering of boost pressure oil for described steering actuation cylinder, described emergency vehicle steering also includes: air motor, and its clutch end is in transmission connection with the power intake of described power assistance pump for steering；Air accumulator, its gas outlet is connected to the air inlet of described air motor；Switch valve, is arranged in the gas circuit between the gas outlet of described air accumulator and the air inlet of described air motor；Inflating pump, its gas outlet is connected to the air inlet of described air accumulator, and its power intake is in transmission connection with the clutch end of vehicle motor.Implement the present invention, it is possible to realize emergent power steering when vehicle motor lost efficacy, so can be prevented effectively from driver and bigger difficulty occurs when steering operation such that it is able to be prevented effectively from the corresponding accident of appearance, improve safety.
Description
Technical field
The present invention relates to Vehicular turn technical field, meet an urgent need steering particularly to one.
Background technology
At present, in engineering truck, such as in autocrane, its steering typically uses power to turn
To device, this power steering gear is usually and adds a set of power steering dress on the basis of manual steering system
Put formation.The modal form of this power steering apparatus is hydraulic pressure assisted steering device, specifically,
This hydraulic pressure assisted steering device includes power assistance pump for steering and the steering actuation cylinder being connected with vehicle bridge steering mechanism.
At nominal conditions, it is achieved the energy needed for Vehicular turn only has sub-fraction to be to be passed through machine by driver
Tool steering system provides, and major part is provided by hydraulic pressure assisted steering device by electromotor, i.e.
In steering procedure, driven by engine power assistance pump for steering operates, and then provides pressure oil to steering actuation cylinder, makes
Steering actuation cylinder action, thus auxiliary realizes turning to of tire.
But, if the normal transport condition of vehicle meets with accident, car load dynamic failure, electromotor stops
Machine or flame-out, now, hydraulic pressure assisted steering device will run out of steam source, it will to Driver Steering Attention band
Carry out bigger difficulty, easily cause accident to occur；Typically require in view of engineering truck and trudge and general work
Making under the adverse circumstances such as field, this risk will be amplified further.
Therefore, how the above-mentioned deficiency for prior art improves, and is that those skilled in the art urgently solve
Technical problem certainly.
Summary of the invention
In view of this, an object of the present invention is to provide a kind of emergency vehicle steering, existing to solve
There is the problem being difficult to power steering in technology when vehicle power lost efficacy, thus it is corresponding to be prevented effectively from appearance
Accident.
Specifically, this emergency vehicle steering includes that hydraulic pressure assisted steering device, described hydraulic booster turn
Steering actuation cylinder is included and for providing the power steering of boost pressure oil for described steering actuation cylinder to device
Pump, described emergency vehicle steering also includes: air motor, its clutch end and described power steering
The power intake of pump is in transmission connection；Air accumulator, its gas outlet is connected to the air inlet of described air motor；Open
Close valve, be arranged in the gas circuit between the gas outlet of described air accumulator and the air inlet of described air motor；Beat
Air pump, its gas outlet is connected to the air inlet of described air accumulator, its power intake and the power of vehicle motor
Outfan is in transmission connection.
Further, described hydraulic pressure assisted steering device also includes fuel tank and reversal valve；Described power assistance pump for steering
Inlet port be connected to fuel tank, oil-out is connected to the oil-in of described reversal valve, and the oil return opening of described reversal valve connects
In described fuel tank, two actuator ports of described reversal valve are connected to two effects of described steering actuation cylinder respectively
Chamber, the duty of described reversal valve is corresponding with steering manipulation state.
Further, described reversal valve is rotary valve.
Further, described air accumulator is provided with relief valve.
Further, described switch valve is electromagnetic valve.
Further, described emergency vehicle steering also includes controller, the first output of described controller
Be terminated at the Electromagnetic Control end of described switch valve, described controller for when described vehicle motor is shut down and
Control described switch valve when Vehicular turn and be in connected state.
Further, between power intake and the clutch end of described vehicle motor of described inflating pump
It is provided with arrangement of clutch.
Further, described arrangement of clutch is electric-controlled engaging and disengaging gear, and described emergency vehicle steering also includes
Controller and the pressure-detecting device being connected with its signal, described pressure-detecting device is arranged at described gas storage
On tank, the second outfan of described controller is connected to the automatically controlled end of described electric-controlled engaging and disengaging gear, described controller
For controlling when described vehicle motor normally works and when the pressure of described air accumulator is not up to predetermined value
Described arrangement of clutch is in engagement state.
When the emergency vehicle using the present invention turns to this system, in vehicle travel process, in normal conditions,
Power can be provided by vehicle motor to inflating pump, make inflating pump inflate to air accumulator, and then make air accumulator
Interior gas pressure reaches predetermined value, when meeting with emergency case and causing vehicle motor shut down or stop working, and can
So that switch valve is in connected state, so that air accumulator release output high-pressure gas drives air motor, gas
The power that dynamic motor produces drives power assistance pump for steering, thus realizes emergent power steering, so can effectively keep away
Exempt from driver and bigger difficulty occurs when steering operation such that it is able to be prevented effectively from the corresponding accident of appearance, effectively
Reduce potential safety hazard.
Another object of the present invention is to provide a kind of wheeled crane, during to be effectively improved transition, to transport
Security performance.
Specifically, this wheeled crane is provided with the emergency vehicle steering described in any of the above-described item.
Further, described wheeled crane is autocrane.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.At accompanying drawing
In:
The principle composition schematic diagram of a kind of emergency vehicle steering that Fig. 1 provides for the embodiment of the present invention, for
Readily appreciate and illustrate, figure also show the schematic block diagram of vehicle motor.
Label declaration in figure:
1 hydraulic pressure assisted steering device
2 meet an urgent need steering power provide device
3 electromotors
4 controllers
11 steering actuation cylinders
12 reversal valves
13 power assistance pump for steerings
14 fuel tanks
21 inflating pumps
22 air accumulators
23 air motors
24 switch valves
25 relief valve
26 pressure-detecting devices
Detailed description of the invention
It should be pointed out that, in this part to the description of concrete structure and description order it is only saying specific embodiment
Bright, it is not construed as that protection scope of the present invention is had any restriction effect.Additionally, when not conflicting,
Embodiment in this part and the feature in embodiment can be mutually combined.
Refer to Fig. 1, below in conjunction with accompanying drawing, the embodiment of the present invention is elaborated.
As it is shown in figure 1, the emergency vehicle steering of the present embodiment can include hydraulic pressure assisted steering device 1,
Air motor 23, switch valve 24, air accumulator 22 and inflating pump 21.
Wherein, hydraulic pressure assisted steering device 1 preferably includes steering actuation cylinder 11, reversal valve 12, power steering
Pump 13 and fuel tank 14；The inlet port of power assistance pump for steering 13 is connected to fuel tank 14, and oil-out is connected to reversal valve 12
Oil-in, the oil return opening of reversal valve 12 is connected to fuel tank 14, and two actuator ports of reversal valve 12 connect respectively
In two acting chambers of steering actuation cylinder 11, reversal valve 12 is capable of staggered commutation, i.e. in the first work
Making under state, oil-in and first actuator port of reversal valve 12 communicate, oil return opening and the second actuator port phase
Logical, under the second duty, oil-in and the second actuator port communicate, oil return opening and the first working oil
Mouth communicates, and the duty of reversal valve can be with steering state (i.e. steering manipulation state, the correspondence of driver
Manipulation state in steering wheel) corresponding, so that the power steering state of servo-cylinder is fitted mutually with steering state
Should.
The clutch end of air motor 23 is in transmission connection with the power intake of power assistance pump for steering 13；Gas storage
The gas outlet of tank 22 is connected to the air inlet of air motor 23, and the gas outlet of air motor 23 can directly connect
In air；Switch valve 24 is arranged at the gas between the gas outlet of air accumulator 22 and the air inlet of air motor 23
Lu Shang；The gas outlet of inflating pump 21 is connected to the air inlet of air accumulator, the power intake of inflating pump 21 and car
The clutch end of electromotor 3 is in transmission connection.
The operation principle of the emergent steering of above-described embodiment is described: at vehicle row below in conjunction with concrete scene
During sailing, in normal conditions, vehicle motor 3 normally works, and switch valve 24 is off,
Inflating pump 21 can make under the effect of vehicle motor 3 air accumulator 22 be full of scheduled pressure value gas (as
Air), when driver carries out steering operation, power assistance pump for steering 13 can be in the effect of vehicle motor 3
Under (power intake of power assistance pump for steering 13 also clutch end with vehicle motor 3 is in transmission connection) fortune
Turning with pressure oil output, pressure oil arrives steering actuation cylinder 11 after reversal valve 12, thus realizes normal work
Power steering under condition；In the process of moving, when experience emergency case causes vehicle power to lose efficacy, (vehicle is sent out
Motivation 3 is shut down or flame-out) time, vehicle motor 3 can not provide power for power assistance pump for steering 13, this
Under operating mode, switch valve 24 can be made to be in connected state, the gases at high pressure in such air accumulator 22 will be by opening
Close valve 24 to act on to air motor 23 so that it operates, and then the power making air motor produce drives and turns to
Boost pump, thus realize emergent power steering；It follows that compared with prior art, above-described embodiment
Emergency vehicle steering is capable of the emergent power steering of vehicle, it is possible to be prevented effectively from driver at vehicle
Appearance bigger difficulty during steering operation is carried out such that it is able to be prevented effectively from the corresponding accident of appearance after dynamic failure,
Effectively reduce potential safety hazard.
In specific implementation process, the emergency vehicle steering of above-described embodiment can also make following at least one
Plant and optimize:
One, the reversal valve 12 of hydraulic pressure assisted steering device 1 can use rotary valve, so facilitates implementation and is turning to
During, steering state (the turning to corresponding to driver of the duty of reversal valve 12 and manual steering system
Controlled state) adapt.
Two, it is provided with relief valve 25 on air accumulator 22, the gas pressure in air accumulator 22 so can be made to reach
To predetermined pressure, and air accumulator 22 can be made will not to damage because air pressure inside is excessive.
Three, the power intake of power assistance pump for steering 13 can be engageablely (such as by corresponding arrangement of clutch)
Being in transmission connection with the clutch end of vehicle motor 3, the clutch end of air motor 23 can be engageable
Ground is in transmission connection with the power intake of power assistance pump for steering 13, so facilitates implementation and lost efficacy at vehicle motor 3
Time the power intake of power assistance pump for steering 13 and the clutch end of vehicle motor 3 are disengaged and by pneumatic
The clutch end of motor 23 engages with the power intake of power assistance pump for steering 13, also allows for realizing normally
Under operating mode just the power intake of power assistance pump for steering 13 engage with the clutch end of vehicle motor 3 and
The power intake of the clutch end of air motor 23 with power assistance pump for steering 13 is disengaged.
Four, can arrange between the power intake and the clutch end of vehicle motor 3 of inflating pump 21
There is arrangement of clutch, such as electric-controlled engaging and disengaging gear, so facilitate implementation and pass through vehicle motor in normal conditions
3 provide power to inflating pump 21, to realize the inflation of air accumulator 22.
Five, in order to quickly realize the emergent power steering under unusual service condition, switch valve 24 can use electromagnetic valve；
On this basis, emergency vehicle steering can also include controller 4, this controller 4 can have to
A few outfan, its first outfan is connected to the Electromagnetic Control end of switch valve, and this controller 4 can also have
Having at least one input, such as, its certain input (can pass through sensing device) and obtain turning of vehicle
To state, another input can obtain the current state of vehicle motor 3, the most in the process of moving,
When controller 4 knows that vehicle motor 3 is shut down and during Vehicular turn, and controller 4 can control switch valve
24 electric (as a example by switch valve 24 is as normally closed solenoid valve), make switch valve 24 be in connected state, from
And realize emergent power steering.Further, if use the scheme of aforementioned " four " simultaneously, emergency vehicle turns
Pressure-detecting device 26 can also be included to system, the function of controller 4 can also respective extension, specifically,
This pressure-detecting device 26 is arranged on air accumulator 22, for detecting the air pressure inside of air accumulator 22, pressure
Detection device 26 is connected with an input mono signal of controller 4, and the second outfan of controller 4 is connected to electricity
The automatically controlled end of control arrangement of clutch, controller 4 is additionally operable to when vehicle motor normally works and at air accumulator 22
Air pressure inside when being not up to predetermined value, control described electric-controlled engaging and disengaging gear and be in engagement state, so that inflating
Pump 21 is inflated to air accumulator 22.Further, if use the scheme of aforementioned " three ", controller the most simultaneously
The function of 4 can be with respective extension, and such as, other outfans of controller 4 can be connected to power assistance pump for steering
Arrangement of clutch between 13 and vehicle motor 3 and power assistance pump for steering 13 and air motor 23 (with
As a example by electric-controlled engaging and disengaging gear) automatically controlled end, controller 4 be additionally operable to state according to vehicle motor 3 and/
Or currently steering state controls the engagement state of each arrangement of clutch, it is achieved in that under nominal situation and abnormal work
The full-automatic switching of power steering state under condition.In addition, it is necessary to explanation, during implementing,
Controller 4 can use PLC (Programmable Logic Controller, programmable logic controller (PLC))
Or relay, solenoid valve circuit, sensor access circuit etc. and build.
Six, for the ease of installing, arranging and safeguard, can be by inflating pump 21, air accumulator 22 and pneumatic horse
Reach 23 integrally disposed in emergent steering power provides device 2.
It should be noted that the emergent steering boost system of above-described embodiment helps to comprise the hydraulic pressure shown in Fig. 1
Power transfer 1 is illustrated, but in other embodiments, hydraulic pressure assisted steering device 1 concrete
Form is not limited to the situation shown in Fig. 1, it would however also be possible to employ other forms.
Other embodiments of the invention additionally provide a kind of wheeled crane, such as autocrane, this wheeled lifting
The emergency vehicle steering described in above-described embodiment it is provided with, due to above-mentioned emergency vehicle steering system on machine
System has above-mentioned technique effect, and therefore, this wheeled crane is effectively increased safety when transition, transport
The specific implementation process of its appropriate section of energy is similar to the above embodiments, and the specific implementation process of other parts can
See the associated description of prior art, do not repeat.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (10)
1. an emergency vehicle steering, including hydraulic pressure assisted steering device (1), described hydraulic booster turns
Steering actuation cylinder (11) is included and for providing power-assisted for described steering actuation cylinder (11) to device (1)
The power assistance pump for steering (13) of pressure oil, it is characterised in that described emergency vehicle steering also includes:
The power intake transmission of air motor (23), its clutch end and described power assistance pump for steering (13)
Connect；
Air accumulator (22), its gas outlet is connected to the air inlet of described air motor (23)；
Switch valve (24), is arranged at gas outlet and the described air motor (23) of described air accumulator (22)
In gas circuit between air inlet；
Inflating pump (21), its gas outlet is connected to the air inlet of described air accumulator (22), its power intake with
The clutch end of vehicle motor (3) is in transmission connection.
2. emergency vehicle steering as claimed in claim 1, it is characterised in that described hydraulic booster turns
Fuel tank (14) and reversal valve (12) is also included to device (1)；The oil suction of described power assistance pump for steering (13)
Mouth is connected to fuel tank, and oil-out is connected to the oil-in of described reversal valve (12), returning of described reversal valve (12)
Hydraulic fluid port is connected to described fuel tank (14), two actuator ports of described reversal valve (12) be connected to respectively described in turn to
Two acting chambers of servo-cylinder (11), the duty of described reversal valve is corresponding with steering manipulation state.
3. emergency vehicle steering as claimed in claim 2, it is characterised in that described reversal valve (12)
For rotary valve.
4. emergency vehicle steering as claimed in claim 1, it is characterised in that described air accumulator (22)
On be provided with relief valve (25).
5. the emergency vehicle steering as described in any one of Claims 1-4, it is characterised in that described
Switch valve (24) is electromagnetic valve.
6. emergency vehicle steering as claimed in claim 5, it is characterised in that described emergency vehicle turns
Also include that to system controller (4), the first outfan of described controller (4) are connected to described switch valve (24)
Electromagnetic Control end, described controller (4) is for when described vehicle motor (3) is shut down and at vehicle
Control described switch valve (24) when turning to and be in connected state.
7. the emergency vehicle steering as described in any one of Claims 1-4, it is characterised in that described
Be provided with between power intake and the clutch end of described vehicle motor (3) of inflating pump (21) from
Locking device.
8. emergency vehicle steering as claimed in claim 7, it is characterised in that described arrangement of clutch is
Electric-controlled engaging and disengaging gear, described emergency vehicle steering also includes controller (4) and is connected with its signal
Pressure-detecting device (26), described pressure-detecting device (26) is arranged on described air accumulator (22), institute
The second outfan stating controller (4) is connected to the automatically controlled end of described electric-controlled engaging and disengaging gear, described controller (4)
For when described vehicle motor (3) normally work and the most pre-at the pressure of described air accumulator (22)
Control described arrangement of clutch during definite value and be in engagement state.
9. a wheeled crane, it is characterised in that be provided with claim 1 on described wheeled crane
To the emergency vehicle steering described in 8 any one.
10. wheeled crane as claimed in claim 9, it is characterised in that described wheeled crane is vapour
Car crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410423911.5A CN104210541B (en) | 2014-08-26 | 2014-08-26 | Emergency vehicle steering and wheeled crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410423911.5A CN104210541B (en) | 2014-08-26 | 2014-08-26 | Emergency vehicle steering and wheeled crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104210541A CN104210541A (en) | 2014-12-17 |
| CN104210541B true CN104210541B (en) | 2016-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410423911.5A Active CN104210541B (en) | 2014-08-26 | 2014-08-26 | Emergency vehicle steering and wheeled crane |
Country Status (1)
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| CN (1) | CN104210541B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741154B (en) * | 2016-11-15 | 2019-09-13 | 中联重科股份有限公司 | Steering control system of crane and automobile crane |
| CN108657272A (en) * | 2017-03-31 | 2018-10-16 | 宝沃汽车（中国）有限公司 | Electro-motive vehicle steering boost system and method and electro-motive vehicle |
| CN108657266A (en) * | 2017-03-31 | 2018-10-16 | 宝沃汽车（中国）有限公司 | Vehicular turn force aid system and method and electro-motive vehicle |
| CN107829998A (en) * | 2017-12-04 | 2018-03-23 | 洛阳理工学院 | A kind of new gas-liquid power conversion method |
| CN114590314A (en) * | 2022-03-22 | 2022-06-07 | 三一汽车起重机械有限公司 | Emergency steering system, chassis and operation machine |
| CN115246437B (en) * | 2022-07-11 | 2024-03-08 | 湖南行必达网联科技有限公司 | Steering hydraulic control system and method and vehicle |
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| US3942412A (en) * | 1974-11-01 | 1976-03-09 | Sheppard Richard H | Fluid control system for dual power steering |
| US4129001A (en) * | 1977-11-25 | 1978-12-12 | Fiat-Allis Construction Machinery, Inc. | Engine air heater and starting circuits to by-pass auxiliary steering circuit |
| GB2209316A (en) * | 1987-09-02 | 1989-05-10 | Dana Corp | Hydraulic steering system |
| CN2663255Y (en) * | 2003-11-25 | 2004-12-15 | 东风新疆汽车有限公司 | Modified power-assisted hydraulic system of turning machine |
| CN201872788U (en) * | 2010-09-15 | 2011-06-22 | 魏大为 | Pneumatic hydraulic power assisted steering power pump of automobile |
| CN103359162A (en) * | 2012-04-01 | 2013-10-23 | 北汽福田汽车股份有限公司 | Vehicle steering device and control method |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3942412A (en) * | 1974-11-01 | 1976-03-09 | Sheppard Richard H | Fluid control system for dual power steering |
| US4129001A (en) * | 1977-11-25 | 1978-12-12 | Fiat-Allis Construction Machinery, Inc. | Engine air heater and starting circuits to by-pass auxiliary steering circuit |
| GB2209316A (en) * | 1987-09-02 | 1989-05-10 | Dana Corp | Hydraulic steering system |
| CN2663255Y (en) * | 2003-11-25 | 2004-12-15 | 东风新疆汽车有限公司 | Modified power-assisted hydraulic system of turning machine |
| CN201872788U (en) * | 2010-09-15 | 2011-06-22 | 魏大为 | Pneumatic hydraulic power assisted steering power pump of automobile |
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| Publication number | Publication date |
|---|---|
| CN104210541A (en) | 2014-12-17 |
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