CN201329894Y - Steering gear for wheels of aircraft tractor - Google Patents
Steering gear for wheels of aircraft tractor Download PDFInfo
- Publication number
- CN201329894Y CN201329894Y CNU200820226495XU CN200820226495U CN201329894Y CN 201329894 Y CN201329894 Y CN 201329894Y CN U200820226495X U CNU200820226495X U CN U200820226495XU CN 200820226495 U CN200820226495 U CN 200820226495U CN 201329894 Y CN201329894 Y CN 201329894Y
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- master controller
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- data bus
- steering device
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Abstract
The utility model relates to a steering gear for the wheels of an aircraft tractor, which belongs to the aviation surface equipment field The steering gear is provided with a steering hydro cylinder and a steering axle, and is characterized in that four wheel rims of a front steering axle and a back steering axle are respectively in driving connection with the respective steering hydro cylinders, each steering hydro cylinder is respectively connected with the separated proportional valves, and four proportional valves are parallel connected with the outlet of a load sensing pump. The steering gear uses a master controller and a bus model and is combined with the electric and hydraulic advantages, and the proportional valves are away from a cab; and therefore, the pipeline layout is greatly simplified, the flexibility of hydraulic component layout is increased, the noise pollution to the cab is reduced, the pure rolling steer of Ackermann steering principle can be achieved, and skimming wear capacity of the tires is greatly reduced.
Description
Technical field
The utility model relates to aviation surface facility field, say in detail be a kind of be used to control the aircraft towing tyre revolution to the wheel steering device of aircraft towing.
Background technology
As everyone knows, aircraft towing is a kind of by the airport ground facilities of mode second-mission aircrafts such as pushing tow, traction to the hardstand assigned address, because the quality of aircraft is all very big, therefore also has higher requirement for the steering capability of aircraft towing.
The steering mode of tradition tractor truck generally adopts all hydraulic pressure steering-gear, mainly by Hydraulic Pump, all-hydraulic steering gear, turn to fluid cylinder, steeraxle etc. to form, Hydraulic Pump provides flow for steering swivel system, all-hydraulic steering gear provides corresponding steering flow according to the rotating speed of bearing circle for turning to fluid cylinder, then control the turning velocity of steeraxle wheel rim, realize turning to by the tie rod linkage that the steering track rod between the steeraxle wheel rim constitutes.
Because hydro-steering all connects by hydraulic tubing and realizes, therefore the location arrangements of all-hydraulic steering gear is restricted, the hydraulic tubing complexity, it is big to take up room, having increased a large amount of flexible pipes is connected with adaptor union, the fault rate that the hydraulic leak reason produces is higher, the fault judgement of system and repair and maintenance are also inconvenient, deflector simultaneously also can produce very big noise in operator's compartment, and the steering swivel system that adopts all-hydraulic steering gear is difficult to realize the independent steering of each wheel rim, and the Tyte Wear amount is bigger.Even the multiple pattern that turns to is arranged, various turning to can not be accomplished very accurately in the pattern action, and that runs at high speed is stable bad.
Shortcoming at above-mentioned all-hydraulic braking, the wheel steering device of the utility model aircraft towing, adopt master controller and bus mode, combine electric and hydraulic pressure advantage separately, apportioning valve is away from operator's compartment, simplify piping layout greatly, increased the alerting ability that Hydraulic Elements are arranged, reduced the noise emission in the operator's compartment.And the pure rolling that can realize the Ackermann steering principle turns to, and significantly reduces the skimming wear amount of tire.
Summary of the invention
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of aircraft tractor four-wheel independent steering assembly, adopt master controller and bus mode, combine electric and hydraulic pressure advantage separately, apportioning valve is away from operator's compartment, simplify piping layout greatly, increased the alerting ability that Hydraulic Elements are arranged, reduced the noise emission in the operator's compartment.And the pure rolling that can realize the Ackermann steering principle turns to, and significantly reduces the skimming wear amount of tire.
The utility model adopts following technical solution: be provided with and turn to oil cylinder and steeraxle, it is characterized in that, before and after four wheel rims of steeraxle be connected driving with separately the oil cylinder that turns to respectively, each turns to oil cylinder to be connected with apportioning valve independently respectively, and four apportioning valves are in parallel with the load-transducing delivery side of pump.
The utility model also can be realized by following measure: the steering yoke bolt top of wheel rim is equipped with angular transducer and is connected with the data bus of master controller.The signal input part of apportioning valve is connected with the data bus of master controller.The pressure sensor output of load-transducing pump is connected with the data bus of master controller.Master controller links to each other with the bearing circle module through BDB Bi-directional Data Bus.
The beneficial effects of the utility model are: owing to adopt master controller and bus mode, combine electric and hydraulic pressure advantage separately, apportioning valve is away from operator's compartment, simplified piping layout greatly, increased the alerting ability that Hydraulic Elements are arranged, reduce the noise emission in the operator's compartment, and can realize that the pure rolling of Ackermann steering principle turns to, significantly reduce the skimming wear amount of tire.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a principle schematic of the present utility model.
Fig. 2 is that two-wheeled of the present utility model turns to pattern diagram.
Fig. 3 is a four-wheel steering pattern diagram of the present utility model.
Fig. 4 is that diagonal of the present utility model turns to pattern diagram.
Fig. 5 is a pivot stud pattern diagram of the present utility model.
Fig. 6 is a stopping brake pattern diagram of the present utility model.
Among the figure, 1. bearing circle module, 2. master controller, 3. bus, 4. angular transducer, 5. steeraxle 6. turns to oil cylinder, 7. by pass valve, 8. shuttle valve, 9. pressure sensor, 10. load-transducing pump, 11. apportioning valves, 12. hydraulic tubings, 13. wheel rims.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the wheel steering device of aircraft towing of the present utility model is described further, to help to understand content of the present utility model.
As shown in Figure 1, four wheel rims 13 of steeraxle 5 are connected driving with separately the oil cylinder 6 that turns to respectively before and after the utility model, each turns to oil cylinder 6 to be connected with apportioning valve 11 independently respectively, four apportioning valves 11 are in parallel with the outlet of load-transducing pump 10, on each wheel rim 13 tire is housed, the steering yoke bolt top of wheel rim 13 is equipped with angular transducer 4 and is electrically connected with the data bus 3 of master controller 2, the signal input part of apportioning valve 11 is electrically connected with the data bus 3 of master controller 2, the pressure sensor output 9 of load-transducing pump 10 is electrically connected with the data bus 3 of master controller 2, master controller 2 links to each other with bearing circle module 1 electricity through BDB Bi-directional Data Bus, by pass valve 7 is connected in parallel on the major loop of load-transducing pump 10, and the two-way oil cylinder 6 that turns to is connected with apportioning valve 11 and in parallel with shuttle valve 8 through two hydraulic tubings 12.
Load-transducing pump 10 outlet major loops are in parallel with each branch road through apportioning valve 11, for hydrostatic steering system provides hydraulic oil source, system's multiple spot pressure signal is undertaken by a plurality of shuttle valves 8 or the door computing obtains pressure signal maximum in each load of system and passes to load-transducing pump 10, owing to adopt the load sensing system design, the delivery pressure of load-transducing pump 10 and flow can be decided according to the actual needs of load, the peak output pressure of load-transducing pump 10 depends on that maximum overcomes the needed pressure of tire cornering force square in four fluid-link steering oil cylinders 6, and required flow then depends on the aperture of four apportioning valves 11 and the mode of operation of four tires.
Each fluid-link steering oil cylinder 6 all by independent apportioning valve 11 control, is realized independent steering, and is noiseless between mutually.Steeraxle 5 is not established tie rod linkage, two wheel rims 13 on each steeraxle 5 can be under the driving that turns to oil cylinder 6 independent rotation.Angular transducer 4 feeds back to master controller 2 with the steering state of each wheel rim 13, so as to realize to tyre revolution to servocontrol.
Bearing circle module 1 comprises bearing circle, steering hardware, coder and moment feedback motor, bearing circle module 1 is transformed into the intention that turns to of chaufeur digital signal and passes to master controller 2 by coder, master controller 2 is according to present pattern and the angular transducer 4 angles fed back signals of turning to, by the action that a series of monitoring and algorithm come control ratio valve 11, control wheel rim 13 then and turn to.The pressure signal of pressure sensor 9 feedbacks offers the corresponding road feel signal of chaufeur by the opposing torque of master controller 2 control torques feedback motor.
In Fig. 2, R is the turn radius of two-wheeled steering state, the wheel angle feedback signal of angular transducer 4 enters master controller 2, master controller 2 carries out servocontrol by series of algorithms to wheel, control back steeraxle two tire axis are vertically vertical with car body, control two front-wheels deflection angle α, β separately, make two front-wheel axis meet at 1 O with back steeraxle tire axle, it is instantaneous that this point is each tire motion, each tire divertical motion is instantaneous to be met at a bit all the time and can guarantee to turn to moment at any one, and turning to of vehicle all meets the Ackermann steering principle.The major advantage that two-wheeled turns to is that to turn to variation be not very sensitive, is convenient to run at high speed.
In Fig. 3, R is the turn radius of four-wheel steering state, the wheel angle feedback signal of angular transducer 4 enters master controller 2, master controller 2 carries out servocontrol by series of algorithms to wheel, control two front-wheels deflection angle α, β separately, make the four-wheel axis meet at 1 O, it is instantaneous that this point is each tire motion, each tire divertical motion is instantaneous to be met at a bit all the time and can guarantee to turn to moment at any one, and turning to of vehicle all meets the Ackermann steering principle.The major advantage of four-wheel steering reduces turn radius exactly, increases the manoevreability that little working space is turned.
In Fig. 4, each tire axle steering angle direction is consistent and equate, it is parallel also to be that each tire axle remains in steering procedure, and divertical motion is instantaneous in the infinite distance.This function is in order to increase the manoevreability that little working space is turned equally.
In Fig. 5, R is the turn radius of pivot stud state, and the instantaneous instantaneous of each tire axle intersection point is the pivot stud center of the relative vehicle bridge of vehicle.α is the corner of tire, and this value is decided according to the concrete parameter of vehicle, is certain value, promptly to a set vehicle, can only realize the pivot stud of vehicle under unique α.
In Fig. 6, the front-and rear-wheel steer motion is instantaneous not to be overlapped, and tire axle meets at O1, O2 2 points respectively, and vehicle can't move.The Fig. 5 that compares, the β value is littler than the α value, can realize stopping brake, saves special stop device.
Claims (5)
1, a kind of wheel steering device of aircraft towing, be provided with and turn to oil cylinder and steeraxle, it is characterized in that: four wheel rims of front and back steeraxle are connected driving with separately the oil cylinder that turns to respectively, each turns to oil cylinder to be connected with apportioning valve independently respectively, and four apportioning valves are in parallel with the load-transducing delivery side of pump.
2, the wheel steering device of aircraft towing according to claim 1, the steering yoke bolt top that it is characterized in that said wheel rim is equipped with angular transducer and is connected with the data bus of master controller.
3, the wheel steering device of aircraft towing according to claim 1 is characterized in that the signal input part of said apportioning valve is connected with the data bus of master controller.
4, the wheel steering device of aircraft towing according to claim 1 is characterized in that the pressure sensor output of said load-transducing pump is connected with the data bus of master controller.
5,, it is characterized in that said master controller links to each other with the bearing circle module through BDB Bi-directional Data Bus according to the wheel steering device of claim 2 or 3 or 4 described aircraft towings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820226495XU CN201329894Y (en) | 2008-12-10 | 2008-12-10 | Steering gear for wheels of aircraft tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820226495XU CN201329894Y (en) | 2008-12-10 | 2008-12-10 | Steering gear for wheels of aircraft tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201329894Y true CN201329894Y (en) | 2009-10-21 |
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ID=41223269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820226495XU Expired - Fee Related CN201329894Y (en) | 2008-12-10 | 2008-12-10 | Steering gear for wheels of aircraft tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201329894Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730057A (en) * | 2012-07-12 | 2012-10-17 | 徐州重型机械有限公司 | Method and system for controlling turning of chassis and crane with system |
| CN101700771B (en) * | 2009-11-04 | 2014-05-14 | 威海广泰空港设备股份有限公司 | Electrically controlled steering device for aircraft tractor |
| CN109484478A (en) * | 2018-12-10 | 2019-03-19 | 山海特种装备股份有限公司 | A kind of wheel deviation correcting device |
| CN110550194A (en) * | 2019-09-06 | 2019-12-10 | 中国航空工业集团公司西安飞机设计研究所 | cooperative turning control method and cooperative turning control system for airplane |
| CN110615117A (en) * | 2019-09-29 | 2019-12-27 | 北京航瑞达科技有限公司 | Mechanical auxiliary system special for hydraulic synchronous steering system |
-
2008
- 2008-12-10 CN CNU200820226495XU patent/CN201329894Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700771B (en) * | 2009-11-04 | 2014-05-14 | 威海广泰空港设备股份有限公司 | Electrically controlled steering device for aircraft tractor |
| CN102730057A (en) * | 2012-07-12 | 2012-10-17 | 徐州重型机械有限公司 | Method and system for controlling turning of chassis and crane with system |
| CN102730057B (en) * | 2012-07-12 | 2014-12-10 | 徐州重型机械有限公司 | Method and system for controlling turning of chassis and crane with system |
| CN109484478A (en) * | 2018-12-10 | 2019-03-19 | 山海特种装备股份有限公司 | A kind of wheel deviation correcting device |
| CN110550194A (en) * | 2019-09-06 | 2019-12-10 | 中国航空工业集团公司西安飞机设计研究所 | cooperative turning control method and cooperative turning control system for airplane |
| CN110615117A (en) * | 2019-09-29 | 2019-12-27 | 北京航瑞达科技有限公司 | Mechanical auxiliary system special for hydraulic synchronous steering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20131210 |