CN201882142U - Crane truck and steering control device thereof - Google Patents
Crane truck and steering control device thereof Download PDFInfo
- Publication number
- CN201882142U CN201882142U CN2010206631387U CN201020663138U CN201882142U CN 201882142 U CN201882142 U CN 201882142U CN 2010206631387 U CN2010206631387 U CN 2010206631387U CN 201020663138 U CN201020663138 U CN 201020663138U CN 201882142 U CN201882142 U CN 201882142U
- Authority
- CN
- China
- Prior art keywords
- steering
- steering pump
- emergent
- pump
- controlling device
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Power Steering Mechanism (AREA)
Abstract
The utility model discloses a steering control device comprising a main steering pump and an emergency steering pump, wherein oil outlets of the main steering pump and the emergency steering pump are communicated to an oil inlet of a steering gear; the emergency steering pump is a motor-driven oil pump, a drive motor of the emergency steering pump is connected to a vehicle-mounted storage battery of a crane truck in a circuit; the steering control device further comprises a pressure detection device, a speed detection device, an emergency steering switch and a vehicle controller; the vehicle controller controls the emergency steering switch according to signals output by the pressure detection device and the speed detection device. In the device, the motor-driven oil pump is selected as the emergency steering pump, the vehicle-mounted storage battery of the crane truck is used for supplying power for the drive motor of the emergency steering pump, and the drive motor drives the emergency steering pump to work for providing emergency power-assisted steering so as to enable a driver to control the driving direction of a vehicle through rotating a steering wheel when an engine and the main steering pump have failure. The utility model also discloses the crane truck provided with the steering control device.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to the steering controlling device of car hosit.The utility model also relates to the car hosit that is provided with described steering controlling device.
Background technology
Along with rapid development of national economy, engineering truck is being brought into play more and more big effect to economic construction, and its usage safety performance also comes into one's own further, and the in-use performance of engineering truck comprises braking, turns to, unfailing performance and job safety performance.
Car hosit is mounted in a kind of hoisting crane on general-utility car chassis or the cars chassis, and its travel operator's compartment and lifting control cabin branch are arranged.This hoisting crane meets the technical requirements of road vehicle, thereby can travel on all kinds of highways, and its advantage is that manoevreability is good, can shift rapidly, and the scope of hoisting capacity is very big, is to use crane type the most widely.
At present, some car hosit, particularly the power of engine mission need not to be delivered to through auxiliary gear box the vehicle of vehicle front vehicle bridge, and its steering hydraulic force aid system generally has only an independent loop that power steering is provided, and drives power steerig pump by driving engine power oil is provided.Like this, in case when unforeseen circumstances such as driving engine, power steerig pump inefficacy took place suddenly during the vehicle road running, chaufeur is steering dish realization vehicle straight-line travelling or turn to normally, also can't guarantee the safety of vehicle and chaufeur.
In addition, stipulate according to the 30th page of 4.2.7.1 bar of EN13000-2004 " hoisting crane---runabout crane ": " turning facilities should be guaranteed the safe in operation of vehicle when speed arrives limit value; steering swivel system should have the power steering of at least two independent loops; if a loop et out of order of power steering then also should have automatic demonstration.”
Please refer to Fig. 1, Fig. 2, Fig. 1 is the external structure scheme drawing of a kind of representative type car hosit in the prior art; Fig. 2 is the hydraulic principle scheme drawing of the steering controlling device of existing car hosit.
For meeting above-mentioned standard, car hosit 1 shown in Figure 1 is generally drawn a power taking mouth emergent steering pump is installed on change speed gear box, provide the power driven steering pump of meeting an urgent need by change speed gear box, when vehicle on highway during cruising, emergent steering pump and power steerig pump are worked simultaneously; Selector valve is according to the size of power steerig pump delivery rate, and the flow of controlling jury pump output is off-load or enters the steering hydraulic force aid system.
As shown in Figure 2, during main steering pump 2 normal operations in turning to fuel-feed system, the pressure oil of its output enters deflector 4 through the hydraulic fluid port P1 and the hydraulic fluid port A of selector valve 3, and the pressure oil of emergent steering pump 5 outputs returns fuel tank through the hydraulic fluid port P2 and the hydraulic fluid port T of selector valve.When main steering pump 2 shut down because of inefficacy, the pressure oil of emergent steering pump 5 outputs entered deflector 4 through the hydraulic fluid port P2 and the hydraulic fluid port A of change-over valve, for deflector 4 provides power steering, can guarantee the vehicle straight-line travelling or turned to.
But when vehicle need drag when travelling, because change speed gear box and transmission shaft are thrown off, the emergent steering pump 5 that is installed on the change speed gear box can't be worked, and cause chaufeur can't the steering dish to come the travel direction of control vehicle.
In addition, draw a power taking mouth,, on spatial destribution, can be restricted for emergent steering pump 5 provides power from change speed gear box.
Therefore, how improving the steering controlling device of car hosit, to guarantee still can to come the control vehicle travel direction by steering wheel rotation when driving engine, power steerig pump inefficacy take place, is the present technical issues that need to address of those skilled in the art.
The utility model content
First purpose of the present utility model provides a kind of steering controlling device.This device selects for use electric oil pump as emergent steering pump, vehicular power-bottle by car hosit is powered for the drive motor of emergent steering pump, drive motor drives emergent steering pump work emergent power steering is provided, and makes chaufeur still can come the control vehicle travel direction by steering wheel rotation at driving engine, main steering pump when losing efficacy.
Second purpose of the present utility model provides a kind of car hosit that is provided with above-mentioned steering controlling device.
In order to realize above-mentioned first purpose, the utility model provides a kind of steering controlling device, be used for car hosit, comprise main steering pump and emergent steering pump, the oil outlet of described main steering pump and emergent steering pump all is communicated to the deflector oil inlet of described car hosit, described emergent steering pump is an electric oil pump, and its drive motor is connected in the vehicular power-bottle of described car hosit on circuit.
Preferably, further comprise pressure-detecting device, speed detector and emergent pole changer; Described pressure-detecting device is installed on the oil outlet place of described main steering pump, and described speed detector is installed on the engine drive mechanism of described car hosit; The input end of the vehicle control device of described car hosit is connected on circuit with speed detector with described pressure-detecting device, and mouth is connected on circuit with described emergent pole changer.
Preferably, described main steering pump is installed on the engine torque extraction mouth of described car hosit.
Preferably, the drive motor of described emergent steering pump and described emergent pole changer are in parallel on circuit, described emergent pole changer is in series with relay on the branch road at its place, the moving contact of described relay and open contact are serially connected with on the branch road at drive motor place of described emergent steering pump.
Preferably, described emergent pole changer has indicator lamp.
Preferably, the oil circuit board and the fuel tank of described emergent steering pump and drive motor thereof, relay and described car hosit steering hydraulic system are integrated in one.
Preferably, the oil inlet of described main steering pump and emergent steering pump is connected with same fuel tank.
Preferably, the oil outlet place of described main steering pump is provided with check valve.
Preferably, described main steering pump and emergent steering pump are in parallel on oil circuit, form two independently hydraulic circuits.
In order to realize above-mentioned second purpose, the utility model also provides a kind of car hosit, comprise car chassis and be installed in crane arm and turntable on the described car chassis, the knuckle section of described car chassis is provided with to deflector provides power-assisted steering controlling device, and described steering controlling device is specially above each described steering controlling device.
The steering controlling device that the utility model provides selects for use electric oil pump to replace traditional emergent steering pump as emergent steering pump, these parts of selector valve have also been cut down simultaneously, after the improvement, no longer provide the power driven steering pump of meeting an urgent need by change speed gear box, but power for the drive motor of emergent steering pump by the vehicular power-bottle of car hosit, drive emergent steering pump work by drive motor more emergent power steering is provided.When being in operating modes such as driving engine or main steering pump inefficacy when vehicle, under the condition that the vehicular power-bottle power supply capacity allows, the emergent steering pump time enough of can working, make chaufeur can continue the steering dish and come the control vehicle travel direction, as early as possible out of harm's way with vehicle parking, so that carry out follow-up service work, remedied the deficiency of existing steering controlling device, met EN13000-2004 " hoisting crane---runabout crane ", GB 7258-2004 " self-propelled vehicle safe in operation engineering factor " regulation steering swivel system.
Because main steering pump and emergent steering pump have adopted motionless propulsion source respectively, when vehicle on highway during cruising, only main steering pump is in running order, only under the situation that the emergent power-assisted of needs gets involved, emergent steering pump just can start, avoid main steering pump and emergent steering pump to turn round simultaneously, can greatly prolong the service life of emergent steering pump.
In addition, provide power owing to no longer need to draw the power taking mouth for emergent steering pump from change speed gear box, therefore emergent steering pump need not to be installed on the power taking mouth of change speed gear box, and its situation limited on spatial destribution can be greatly improved, and makes the layout of whole steering controlling device more reasonable.
In a kind of specific embodiment, described vehicle control device is judged according to the operation pressure and the speed of a motor vehicle in main steering pump work loop, have only when the main operation pressure that turns to main steering pump oil outlet in the loop is zero, when the speed of a motor vehicle is not equal to 0 two conditions and satisfies simultaneously, just can enable emergent steering pump automatically.This control policy can effectively be avoided the danger that brings because of maloperation, and when situations such as driving engine or main steering pump inefficacy occurring at vehicle, the very first time starts emergent steering pump provides power-assisted for deflector, can not occur pausing or hysteresis phenomenon, farthest guarantee the safety of vehicle and chaufeur.
Car hosit provided by the utility model is provided with above-mentioned steering controlling device, because above-mentioned steering controlling device has above-mentioned technique effect, the car hosit with this steering controlling device also should possess the corresponding techniques effect.
Description of drawings
Fig. 1 is the external structure scheme drawing of a kind of representative type car hosit in the prior art;
Fig. 2 is the hydraulic principle scheme drawing of the steering controlling device of existing car hosit;
Fig. 3 is the hydraulic principle scheme drawing of steering controlling device that the utility model provides;
Fig. 4 is the scheme drawing that is electrically connected of the drive motor of emergent steering pump shown in Fig. 3;
Fig. 5 is the Automatic Control Theory scheme drawing of steering controlling device that the utility model provides.
Among Fig. 1 to Fig. 2:
1. main steering pump 3. selector valves of car hosit 2. 4. deflectors 5. emergent steering pumps
Among Fig. 3 to Fig. 5:
10. main steering pump 10-1. check valve 20. emergent steering pump 20-1. check valve 20-2. by pass valve 20-3. drive motor 30. deflectors 40. vehicular power-bottles 50. emergent pole changer 50-1. indicator lamp 60. relays 70. pressure sensors 80. speed sensors 90. vehicle control devices 100. bearing circle 110. steering gears
The specific embodiment
Core of the present utility model is to select for use electric oil pump as emergent steering pump, vehicular power-bottle by car hosit is powered for the drive motor of emergent steering pump, drive emergent steering pump work by drive motor more emergent power steering is provided, make chaufeur still can come the control vehicle travel direction by steering wheel rotation when losing efficacy at driving engine, main steering pump.
Another core of the present utility model provides a kind of car hosit that is provided with above-mentioned steering controlling device.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 3, Fig. 3 is the hydraulic principle scheme drawing of steering controlling device that the utility model provides.
As shown in the figure, in a kind of specific embodiment, the steering controlling device that the utility model provides comprises main steering pump 10 and emergent steering pump 20.
Main steering pump 10 is installed in the power taking mouth place of driving engine, drive by driving engine, its oil inlet (being hydraulic fluid port P) is connected with the fuel tank of steering hydraulic system by hydraulic tubing, and oil outlet (being hydraulic fluid port A) is connected by the oil inlet of hydraulic tubing with deflector 30.
Emergent steering pump 20 is in parallel with main steering pump 10 on oil circuit, its oil inlet (being hydraulic fluid port P) is connected with the fuel tank of steering hydraulic system by hydraulic tubing, oil outlet (being hydraulic fluid port A) merges the back with the oil outlet of main steering pump 10 and is connected by the oil inlet of hydraulic tubing with deflector 30, form two independently hydraulic circuits, the return opening of deflector 30 returns the fuel tank of steering hydraulic system by hydraulic tubing.
Flow to the oil outlet of main steering pump 10 for the pressure oil that prevents emergent steering pump 20 outputs, be provided with a check valve 10-1 at the oil outlet place of main steering pump 10, simultaneously, for preventing the oil outlet of the emergent steering pump 20 of the pressure oil flow direction that main steering pump 10 is exported, also be provided with a check valve 20-1 at the oil outlet place of emergent steering pump 20.
Emergent steering pump 20 is provided with by pass valve 20-2, and the oil inlet of by pass valve 20-2 is communicated with the oil outlet of emergent steering pump 20, and oil outlet returns the fuel tank of steering hydraulic system.When system pressure increases, traffic demand is reduced, this moment, by pass valve 20-2 opened, and made the unnecessary flow oil sump tank that overflows, guaranteed the by pass valve entrance pressure, and steering pump 20 delivery pressures of promptly meeting an urgent need are constant.
Above-mentioned emergent steering pump 20 can integrate with the check valve 20-1 and the by pass valve 20-2 at its oil outlet place, and at this moment, the oil outlet of check valve 20-1 promptly becomes the oil outlet of emergent steering pump 20.
Please refer to Fig. 4, Fig. 4 is the scheme drawing that is electrically connected of the drive motor of emergent steering pump shown in Fig. 3.
Emergent steering pump 20 is an electric oil pump, and its drive motor 20-3 is connected in the vehicular power-bottle 40 of car hosit on circuit, drives its running by vehicular power-bottle 40.
In the current supply circuit of vehicular power-bottle 40, the drive motor 20-3 of emergent steering pump is in parallel with emergent pole changer 50, emergent pole changer 50 is in series with relay 60 on the branch road at its place, the moving contact of relay 60 and open contact are serially connected with on the branch road at drive motor 20-3 place.
Under the normal condition, emergent pole changer 50 disconnects, and the coil of relay 60 is in power failure state, its moving contact and open contact disconnect, drive motor 20-3 also is in power failure state, and emergent steering pump 20 is not worked, in that needs are emergent when turning to, emergent pole changer 50 closures, the coil electricity of relay 60, its moving contact and open contact closure, the loop at conducting drive motor 20-3 place, under the drive of drive motor 20-3, emergent steering pump 20 is started working.
Be to reduce the exterior line of steering hydraulic system, above-mentioned main steering pump 10 and emergent steering pump 20 shared fuel tanks, and parts such as drive motor 20-3, relay 60, emergent steering pump 20 and oil circuit board, fuel tank can be integrated in one.
Please refer to Fig. 5, Fig. 5 is the Automatic Control Theory scheme drawing of steering controlling device that the utility model provides.
For realizing intelligent control, pressure sensor 70 and speed sensor 80 can further be set, wherein pressure sensor 70 is installed on the oil outlet place of main steering pump 10, is used to gather the operation pressure of main steering pump oil outlet; Speed sensor 80 is installed on the engine drive mechanism, is used to detect the moving velocity of vehicle, and it both can be an existing speed sensor on the car hosit, also can be the speed sensor of setting up in addition.
The signal output part of pressure sensor 70 and speed sensor 80 is connected with vehicle control device 90 communications, receive the pressure signal of pressure sensor 70 outputs and the speed signal of speed sensor 80 outputs by vehicle control device 90, and output is used to control the control signal of emergent pole changer 50.
This control policy can effectively be avoided maloperation, and when situations such as driving engine or 10 inefficacies of main steering pump occurring at vehicle, the very first time starts emergent steering pump 20 for deflector provides power-assisted, can not occur pausing or hysteresis phenomenon, has farthest guaranteed the safety of vehicle and chaufeur.
Principle of work to above-mentioned steering controlling device describes below:
When normal vehicle operation, main steering pump 10 is in running order, the pressure oil of its oil outlet output enters deflector 30, for deflector 30 provides power-assisted, augment direction dish 100 passes to the power of steering gear 110 and changes the direction of transfer of power, alleviate driver's labour intensity, reduce the revolution of bearing circle 100.Because this moment, the oil outlet pressure of main steering pump 10 was non-vanishing, the drive motor 20-3 of therefore emergent steering pump 20 must not be electric, and emergent steering pump 20 is in off working state.
When vehicle is in that engine off landslide turns to and during operating mode such as reversing turns to, the inefficacy of main steering pump, vehicle cart, main steering pump 10 quits work, its oil outlet pressure be zero and car speed non-vanishing, after vehicle control device 90 receives above-mentioned signal, emergent pole changer 50 auto-closings of control immediately, it is electric that the drive motor 20-3 of emergent steering pump 20 is got, and provides power-assisted by the main steering pump 10 of emergent steering pump 20 replacements for deflector 30, till vehicle stops to travel.
Here need to prove, the time that emergent steering pump 20 can be worked is relevant with the power supply capacity of vehicular power-bottle 40, with regard to general run of thins, turn to the lasting time often shorter owing to meet an urgent need, the electric energy that therefore common vehicular power-bottle stores is enough to satisfy this operating needs.Certainly, for further prolonging the work-hours of emergent steering pump 20, also can set up the emergent special-purpose storage battery that turns in addition.
In sum, the steering controlling device that the utility model provides no longer provides the power driven steering pump of meeting an urgent need by change speed gear box, but power for the drive motor of emergent steering pump by the vehicular power-bottle of car hosit, drive emergent steering pump work by drive motor more emergent power steering is provided.When being in operating modes such as driving engine or main steering pump inefficacy when vehicle, make chaufeur can continue the steering dish and come the control vehicle travel direction, as early as possible out of harm's way with vehicle parking, so that carry out follow-up service work, remedied the deficiency of existing steering controlling device, met EN13000-2004 " hoisting crane---runabout crane ", GB7258-2004 " self-propelled vehicle safe in operation engineering factor " regulation steering swivel system.
Because main steering pump 10 and emergent steering pump 20 have adopted motionless propulsion source respectively, when vehicle on highway during cruising, only main steering pump 10 is in running order, only under the situation that the emergent power-assisted of needs gets involved, emergent steering pump 20 just can start, avoided main steering pump 10 to turn round simultaneously, greatly prolonged the service life of emergent steering pump 20 with emergent steering pump 20.
In addition, provide power owing to no longer need to draw the power taking mouth for emergent steering pump 20 from change speed gear box, therefore emergent steering pump 20 need not to be installed on the power taking mouth of change speed gear box, and its situation limited on spatial destribution can be greatly improved, and makes the layout of whole steering controlling device more reasonable.
Except above-mentioned steering controlling device, the utility model also provides a kind of car hosit, comprise car chassis and be installed in crane arm and turntable on the described car chassis, the knuckle section of described car chassis is provided with to deflector power-assisted steering controlling device is provided, described steering controlling device is specially above-described steering controlling device, all the other structures see also prior art, and this paper repeats no more.
More than steering controlling device provided by the utility model and car hosit are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. steering controlling device, be used for car hosit, comprise main steering pump and emergent steering pump, the oil outlet of described main steering pump and emergent steering pump all is communicated to the deflector oil inlet of described car hosit, it is characterized in that, described emergent steering pump is an electric oil pump, and its drive motor is connected in the vehicular power-bottle of described car hosit on circuit.
2. steering controlling device according to claim 1 is characterized in that, further comprises pressure-detecting device, speed detector and emergent pole changer; Described pressure-detecting device is installed on the oil outlet place of described main steering pump, and described speed detector is installed on the engine drive mechanism of described car hosit; The input end of the vehicle control device of described car hosit is connected on circuit with speed detector with described pressure-detecting device, and mouth is connected on circuit with described emergent pole changer.
3. steering controlling device according to claim 2 is characterized in that, described main steering pump is installed on the engine torque extraction mouth of described car hosit.
4. steering controlling device according to claim 3, it is characterized in that, the drive motor of described emergent steering pump and described emergent pole changer are in parallel on circuit, described emergent pole changer is in series with relay on the branch road at its place, the moving contact of described relay and open contact are serially connected with on the branch road at drive motor place of described emergent steering pump.
5. steering controlling device according to claim 4 is characterized in that, described emergent pole changer has indicator lamp.
6. steering controlling device according to claim 5 is characterized in that, the oil circuit board and the fuel tank of described emergent steering pump and drive motor thereof, relay and described car hosit steering hydraulic system are integrated in one.
7. according to each described steering controlling device of claim 1 to 6, it is characterized in that the oil inlet of described main steering pump and emergent steering pump is connected with same fuel tank.
8. steering controlling device according to claim 7 is characterized in that, the oil outlet place of described main steering pump is provided with check valve.
9. according to each described steering controlling device of claim 1 to 6, it is characterized in that described main steering pump and emergent steering pump are in parallel on oil circuit, form two independently hydraulic circuits.
10. car hosit, comprise car chassis and be installed in crane arm and turntable on the described car chassis, the knuckle section of described car chassis is provided with to deflector power-assisted steering controlling device is provided, it is characterized in that described steering controlling device is specially aforesaid right requirement 1 to 9 each described steering controlling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631387U CN201882142U (en) | 2010-12-15 | 2010-12-15 | Crane truck and steering control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631387U CN201882142U (en) | 2010-12-15 | 2010-12-15 | Crane truck and steering control device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201882142U true CN201882142U (en) | 2011-06-29 |
Family
ID=44179680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206631387U Expired - Fee Related CN201882142U (en) | 2010-12-15 | 2010-12-15 | Crane truck and steering control device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201882142U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050143A (en) * | 2010-12-15 | 2011-05-11 | 徐州重型机械有限公司 | Truck crane and steering control device thereof |
| CN103264725A (en) * | 2013-05-28 | 2013-08-28 | 安徽合力股份有限公司 | Safe steering system of heavy forklift |
| CN103465955A (en) * | 2013-09-24 | 2013-12-25 | 徐州重型机械有限公司 | Hydraulic control valve bank for locking steering shaft of crane, steering system and crane |
| CN104724165B (en) * | 2013-12-20 | 2017-01-25 | 北汽福田汽车股份有限公司 | Vehicle steering device, control method thereof and vehicle |
-
2010
- 2010-12-15 CN CN2010206631387U patent/CN201882142U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050143A (en) * | 2010-12-15 | 2011-05-11 | 徐州重型机械有限公司 | Truck crane and steering control device thereof |
| CN103264725A (en) * | 2013-05-28 | 2013-08-28 | 安徽合力股份有限公司 | Safe steering system of heavy forklift |
| CN103465955A (en) * | 2013-09-24 | 2013-12-25 | 徐州重型机械有限公司 | Hydraulic control valve bank for locking steering shaft of crane, steering system and crane |
| CN104724165B (en) * | 2013-12-20 | 2017-01-25 | 北汽福田汽车股份有限公司 | Vehicle steering device, control method thereof and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102050143A (en) | Truck crane and steering control device thereof | |
| US8702560B2 (en) | Construction machine | |
| CN102120447B (en) | Forklift hydraulic system matched with multi-functional wet brakes | |
| CN104129428B (en) | Emergency steering control system and method | |
| CN203496984U (en) | Underground wheeled vehicle emergency steering system | |
| CN107117067A (en) | A kind of electric sanitation vehicle control | |
| SE1250590A1 (en) | Control system for equipment on a vehicle with electric hybrid drive system | |
| CN201882142U (en) | Crane truck and steering control device thereof | |
| CN201613932U (en) | Electric motor pump auxiliary emergency steering hydraulic device for hydraulic steering of engineering vehicles | |
| CN104228813A (en) | Tractor | |
| CN106741154B (en) | Steering control system of crane and automobile crane | |
| CN102259816B (en) | Operation safety control system for internal combustion forklift truck | |
| CN200971110Y (en) | Vehicle power steering auxiliary safety system | |
| CN113226891B (en) | Wire control independent steering mechanism with redundancy function and control method | |
| CN204605931U (en) | A kind of emergent electrobus electric hydraulic power-assisted steering system | |
| CN202264813U (en) | Crane emergency steering control system and crane | |
| CN201999699U (en) | Operational safety control system of diesel fork lift truck | |
| CN102225731A (en) | Crane as well as startup controlling method and system thereof | |
| CN202175517U (en) | Crane and control system for starting crane | |
| CN102205799A (en) | Finished structure of pure electric car | |
| CN201856659U (en) | Flameproof storage battery tractor | |
| CN114030452A (en) | Electric wheel type mining dump truck and unmanned driving system thereof | |
| CN203780313U (en) | Loading machine | |
| CN104724165A (en) | Vehicle steering device, control method thereof and vehicle | |
| CN203832252U (en) | Electric four-wheel mini-truck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20181215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |