CN105292251A - Four-wheel steering system for automobile - Google Patents
Four-wheel steering system for automobile Download PDFInfo
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- CN105292251A CN105292251A CN201510764990.0A CN201510764990A CN105292251A CN 105292251 A CN105292251 A CN 105292251A CN 201510764990 A CN201510764990 A CN 201510764990A CN 105292251 A CN105292251 A CN 105292251A
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Abstract
The invention discloses a four-wheel steering system for an automobile. The steering system comprises a traditional steering system and an independent steering system, wherein front wheels adopt the pinion-and-rack traditional steering system, and rear wheels adopt the independent steering system; the rear wheel independent steering system is composed of motors, a reduction mechanism and a transmission mechanism, the motors are rotary motors, and the reduction mechanism is a worm and gear mechanism; the transmission mechanism comprises a vehicle frame, the left rear wheel corresponds to one rotary motor, the right rear wheel corresponds to one rotary motor, and the two rotary motors are independent of each other and control the steering motion of the corresponding wheels. By the adoption of the four-wheel steering mode, the defects of a traditional steering system are overcome, the front wheels and the rear wheels conduct antiphase steering during low-speed turning, and then the turning radius of the automobile is reduced to improve maneuverability; the front wheels and the rear wheels mainly conduct in-phase steering during high-speed turning, the side slip angle of the automobile can be reduced, the steady-state overshoot of the automobile yaw rate can be reduced, and the handling stability of the automobile is further improved.
Description
Technical field:
The present invention relates to a kind of four-wheel steering system being applicable to automobile, for the four-wheel steering of automobile.
Background technology:
Along with the progress of expanding economy and auto technology, highway communication presents the trend of highspeed running, wagon flow densification and chaufeur deprofessionaliztion.Motor traffic accidents brings great threat also to the lives and properties of people, and it is directly connected to the safety of people's life and property.How to improve the casualties in vehicle safety, minimizing traffic accident, day by day become the hot issue of automotive research and design field.
Steering swivel system is as one of numerous critical system of automobile, most important to the driving safety of automobile.Although it is quite ripe that traditional steering swivel system (mechanical type, hydraulic booster or electric boosting steering system) has developed, and be widely used in modern automobile, but along with automobile, the continuous progress of Eltec and significantly improving of people's living standard, conventional steering system can not meet the requirement of people to High Performance steering swivel system to a certain extent.And as a kind of method of raising vehicle dynamic performance newly, four-wheel steering technology has obtained increasing attention and application.Compared to traditional steering swivel system, four-wheel steering system can not only overcome Problems existing in conventional steering system, and can when low speed is turned, and front and back wheel phase reversal turns to, and the turn radius that can reduce vehicle improves manoevreability; When tempo turn, front and back wheel mainly turns to as same-phase, can reduce vehicle centroid sideslip angle, reduces the stable state overshoot etc. of vehicle yaw rate, improves vehicle handling stability further.
The overall steering hardware of current automobile back wheel, mainly adopt linear stepping motor, gear rack type steering engine structure under the adjustment of control system on Direct driver rear-wheel steering system assembly, and then the certain angle realizing trailing wheel by pulling round pull bar rotates.But for the overall steering hardware of current trailing wheel, only rely on linear stepping motor to drive steering track rod transverse shifting, need the occasion of larger steering torque at some, such as muddy road surface or when needing larger angle to turn to, often there is certain limitation.In view of the foregoing and the huge market outlook of four-wheel steering and development potentiality, the present inventor has done four-wheel steering mechanism and has researched and analysed further, has invented a kind of four-wheel steering system being applicable to automobile.This steering swivel system is made up of jointly conventional steering system and independent steering system.Wherein, front-wheel is pinion and-rack conventional steering system, and trailing wheel is independent steering system.
Summary of the invention:
The object of the invention is to develop a kind of four-wheel steering system being applicable to automobile, for the four-wheel steering of automobile.To achieve these goals, the present invention realizes by following technical scheme:
Be applicable to a four-wheel steering system for automobile, comprise pinion and-rack conventional steering system and independent steering system; Wherein front-wheel is pinion and-rack conventional steering system, and trailing wheel is independent steering system; Trailing wheel independent steering system is made up of rotating machine, speed reduction gearing, transmission device; Wherein, rotating machine provides power for trailing wheel independent steering; Speed reduction gearing is used for connecting rotating machine and transmission device on the one hand, plays reduction rotating speed on the other hand, increases the effect of moment of torsion, can meet severe road conditions to the requirement turned to.Transmission device is used for that the power of rotating machine is reached rear wheel and realizes rear trailing wheel independent steering.
Left rear wheel described in technical scheme and off hind wheel each to there being a rotating machine, and two rotating machines are separate, vertically place, compared to horizontal positioned, the usage quantity of part can be reduced, simplied system structure, and then cost-saved, save space, improve and turn to efficiency.
Motor described in technical scheme comprises a stator and the coaxial armature of stator, a common axis with drive part and running part.Wherein drive part is connected to realize rotary motion by attaching parts with armature and exports; Running part makes worm screw, for being meshed transmission power with worm gear.The use of this common axis, not only reduces motor quality, shortens installation width, reduces cost, and solves the adjustment problem between motor and worm gear.
Turbine and worm decelerator described in technical scheme, can reduce the rotating speed of rotating machine, increases the torque that rotating machine provides, thus can meet bad working environments to the requirement turned to, and improves the reliability of four-wheel steering.
Four-wheel steering system described in technical scheme, can overcome the deficiency of conventional steering system, and can when low speed is turned, and front and back wheel phase reversal turns to, and can reduce the turn radius of vehicle to improve manoevreability; When tempo turn, front and back wheel mainly turns to as same-phase, can reduce vehicle centroid sideslip angle, reduces the stable state overshoot etc. of vehicle yaw rate, improves vehicle handling stability further.
Rear wheel described in technical scheme and stub orientation angle are all designed to zero, stub wears place by worm gear center.Be all zero compared to four-wheel stub orientation angle, under the prerequisite ensureing turning efficiency, not only work capacity reduces half, and structure is simple, and then also can reduce costs.And get up the variation of original project organization less to the automobile repacking of non-four-wheel independent steering, repacking is got up easily, and save time, cost is low.
Adopt trailing wheel independent steering more can ensure that four-wheel steering angle meets the Ackermam relation with the speed of a motor vehicle and steering wheel angle dynamic mapping compared to trailing wheel Integral steering in technical scheme, and traditional Ackermam relation does not consider the non-linear of vehicle, as factors such as Wheel slips, so this programme can reduce wear on tyres.
Compared with prior art, beneficial effect of the present invention:
1, the present invention adopts turbine and worm decelerator, and play reduction of speed and increase torsion effect, enough torque can be provided to meet bad working environments to the requirement turned to, and reliability is high.
2, because the present invention adopts worm-and-wheel gear, meet under turning to the prerequisite of requirement, the rotating machine of suitable point can be selected, can installing space be saved, reduce costs.
3, in the present invention, the use of common axis not only reduces motor quality, shortens installation width, reduces cost, and solves the adjustment problem between motor and worm gear.
4, compared to trailing wheel Integral steering, trailing wheel independent steering of the present invention can ensure that four-wheel steering angle is Ackermam relation more, reduces wear on tyres.
5, in four-wheel steering system of the present invention, front-wheel is pinion and-rack conventional steering system, and trailing wheel is independent steering, and little to original design change, number of parts is few, can be cost-saving further while raising vehicle mobility, road-holding property.
Accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the structural representation being applicable to the four-wheel steering system of automobile of the present invention.
Fig. 2 is the present invention's rotary motor configuration schematic diagram used.
Fig. 3 is the incorgruous rotation schematic diagram of forward and backward wheel flutter.
Fig. 4 is forward and backward wheel flutter rotating in same direction schematic diagram.
In figure, 1, the near front wheel; 2, rack-and-gear assembly; 3, off front wheel; 4, Steering gear; 5, bearing circle; 6, rotating machine; 7, motor shaft; 8, worm-and-wheel gear; 9, vehicle frame; 10, left rear wheel; 11, off hind wheel; 12, common axis running part; 13, common axis; 14, bearing; 15, electric machine casing; 16, stator; 17, armature; 18, lining; 19, end cap assembly; 20, bearing; 21 common axis drive parts; 22; Attaching parts
Detailed description of the invention:
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Consult Fig. 1, Fig. 2, the four-wheel steering system being applicable to automobile of the present invention comprises pinion and-rack conventional steering system and independent steering system.Wherein front-wheel adopts Pinion-and-rack steering system system, and trailing wheel adopts independent steering system.Trailing wheel independent steering system comprises rotating machine 6, worm-and-wheel gear 8, vehicle frame 9.Wherein, motor shaft 7 is that a common axis comprises running part 12 and drive part 21, and drive part 21 is connected with armature 17 by attaching parts 22, realizes the output of armature 17 rotary motion.The running part 12 of common axis 13 makes worm screw, for being meshed to transmit power with worm gear.Be milled with spline in the middle of worm screw, vehicle frame 9 end is also milled with spline, and both, by spline joint, realize power to reach wheel.When turning to, the running part 12 of common axis 13 and worm gear are meshed, and motor power is reached worm gear, and worm gear wheel drives vehicle frame 9 to rotate, and because wheel is connected with worm gear by vehicle frame, and then drive vehicle wheel rotation, realize turning to.
Consult Fig. 3, automobile is when low speed is turned, and front and back wheel phase reversal turns to, and can reduce the turn radius of vehicle, improves the manoevreability of automobile.
Consult Fig. 4, automobile is when tempo turn, and front and back wheel mainly turns to as same-phase, can reduce vehicle centroid sideslip angle, reduces the stable state overshoot etc. of vehicle yaw rate, improves vehicle handling stability further.
Claims (8)
1. be applicable to a four-wheel steering system for automobile, it is characterized in that this system comprises pinion and-rack conventional steering system and independent steering system; Wherein front-wheel is pinion and-rack conventional steering system, and trailing wheel is independent steering system; Trailing wheel independent steering system is made up of motor, speed reduction gearing, transmission device; Wherein, rotating machine provides power for trailing wheel independent steering; Turbine and worm decelerator is for reducing rotating speed, increase torque; Transmission device is used for that the power of rotating machine is reached rear wheel and realizes rear trailing wheel independent steering.
2. be applicable to the four-wheel steering system of automobile as claimed in claim 1, it is characterized in that turbine and worm decelerator used can reduce the rotating speed of rotating machine, increase the torque that rotating machine provides, thus bad working environments can be met to the requirement turned to, improve the reliability of four-wheel steering.
3. be applicable to the four-wheel steering system of automobile as claimed in claim 1, it is characterized in that worm gear is milled with spline, vehicle frame one end is milled with spline and is connected with worm gear by spline; The other end of vehicle frame is then connected with wheel.
4. be applicable to the four-wheel steering system of automobile as claimed in claim 1, it is characterized in that the rotating band motor-car frame of worm gear rotates, because wheel is connected with vehicle frame, so vehicle frame rotating band motor car wheel rotates, realize turning to.
5. vehicle four-wheel alignment system as claimed in claim 1, is characterized in that rear wheel and stub orientation angle are all designed to zero, stub wears place by worm gear center.
6. be applicable to the four-wheel steering system of automobile as claimed in claim 1, left rear wheel and off hind wheel each to there being a rotating machine; Two rotating machines are separate, vertically place, the divertical motion of the left and right rear wheel of Direct driver.
7. be applicable to the four-wheel steering system of automobile as claimed in claim 1, it is characterized in that front-wheel adopts conventional gears rack steering system, trailing wheel adopts independent steering system, can improve manoevreability and the road-holding property of automobile.
8. be applicable to the four-wheel steering system of automobile as claimed in claim 1, it is characterized in that the effect that can give full play to two wheel independent steerings next, more can ensure that four-wheel steering angle meets the Ackermam relation with the speed of a motor vehicle and steering wheel angle dynamic mapping, reduce wear on tyres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510764990.0A CN105292251A (en) | 2015-11-11 | 2015-11-11 | Four-wheel steering system for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510764990.0A CN105292251A (en) | 2015-11-11 | 2015-11-11 | Four-wheel steering system for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN105292251A true CN105292251A (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510764990.0A Pending CN105292251A (en) | 2015-11-11 | 2015-11-11 | Four-wheel steering system for automobile |
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| CN (1) | CN105292251A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976477A (en) * | 2017-03-27 | 2017-07-25 | 同济大学 | A kind of automobile steering system of achievable preferable Ackermann angle relation |
| CN108082280A (en) * | 2018-01-22 | 2018-05-29 | 湖南星邦重工有限公司 | A kind of walking chassis and the high-altitude operation vehicle with the walking chassis |
| CN108100035A (en) * | 2017-12-26 | 2018-06-01 | 大连民族大学 | A kind of reduction truck radius of turn device |
| CN108688652A (en) * | 2017-04-10 | 2018-10-23 | 保时捷股份公司 | Method for running motor vehicles |
| CN112770959A (en) * | 2018-09-03 | 2021-05-07 | 日立安斯泰莫株式会社 | Steering control device, steering control method, and steering control system |
| CN115285215A (en) * | 2022-08-31 | 2022-11-04 | 松果新能源汽车有限公司 | New energy automobile turns to device |
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| CN102320326A (en) * | 2011-07-08 | 2012-01-18 | 吉林大学 | Control method used for automobile steer-by-wire system |
| CN102582416A (en) * | 2012-02-16 | 2012-07-18 | 吉林大学 | Full line control electric vehicle with variable kinetic characteristics |
| CN102837737A (en) * | 2011-06-20 | 2012-12-26 | 株式会社捷太格特 | Rear wheel steering system |
| CN103072627A (en) * | 2013-01-23 | 2013-05-01 | 中国农业大学 | Electric chassis with four independent turning wheels |
| CN205113423U (en) * | 2015-11-11 | 2016-03-30 | 吉林大学 | Car four wheel steering system based on rear wheel independently turns to |
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2015
- 2015-11-11 CN CN201510764990.0A patent/CN105292251A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61146682A (en) * | 1984-12-20 | 1986-07-04 | Fuji Heavy Ind Ltd | Front and rear wheel steering device for car |
| JPH01266068A (en) * | 1988-04-18 | 1989-10-24 | Mazda Motor Corp | Steering device for vehicle |
| JPH02231271A (en) * | 1989-03-03 | 1990-09-13 | Mazda Motor Corp | Rear wheel steering device for vehicle |
| JPH0361176A (en) * | 1989-07-31 | 1991-03-15 | Suzuki Motor Corp | Rear wheel steering method |
| EP0521450A2 (en) * | 1991-07-01 | 1993-01-07 | Nsk Ltd | Electric four-wheel steering system |
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| CN102582416A (en) * | 2012-02-16 | 2012-07-18 | 吉林大学 | Full line control electric vehicle with variable kinetic characteristics |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976477A (en) * | 2017-03-27 | 2017-07-25 | 同济大学 | A kind of automobile steering system of achievable preferable Ackermann angle relation |
| CN108688652A (en) * | 2017-04-10 | 2018-10-23 | 保时捷股份公司 | Method for running motor vehicles |
| CN108100035A (en) * | 2017-12-26 | 2018-06-01 | 大连民族大学 | A kind of reduction truck radius of turn device |
| CN108082280A (en) * | 2018-01-22 | 2018-05-29 | 湖南星邦重工有限公司 | A kind of walking chassis and the high-altitude operation vehicle with the walking chassis |
| CN112770959A (en) * | 2018-09-03 | 2021-05-07 | 日立安斯泰莫株式会社 | Steering control device, steering control method, and steering control system |
| CN112770959B (en) * | 2018-09-03 | 2023-06-02 | 日立安斯泰莫株式会社 | Steering control device, steering control method, and steering control system |
| CN115285215A (en) * | 2022-08-31 | 2022-11-04 | 松果新能源汽车有限公司 | New energy automobile turns to device |
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Application publication date: 20160203 |
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| RJ01 | Rejection of invention patent application after publication |