CN101450677A - Motor push rod type power-assisted steering apparatus - Google Patents
Motor push rod type power-assisted steering apparatus Download PDFInfo
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- CN101450677A CN101450677A CNA2007101783615A CN200710178361A CN101450677A CN 101450677 A CN101450677 A CN 101450677A CN A2007101783615 A CNA2007101783615 A CN A2007101783615A CN 200710178361 A CN200710178361 A CN 200710178361A CN 101450677 A CN101450677 A CN 101450677A
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Abstract
The invention relates to an electrical push rod type electrical power-assisted steering device, which comprises a recirculating ball steering gear provided with a torque sensing device, an electrical push rod and an electronic control unit, wherein the torque sensing device is used for detecting moment acted on a steering wheel, and is arranged on an input shaft of the recirculating ball steering gear. One end of the electrical push rod is connected with a steering rock arm, and the other end of the electrical push rod is connected with a vehicle frame. The electrical push rod comprises a power-assisted motor and a speed reducing mechanism, a push rod and so on. An input shaft of the speed reducing mechanism of the power-assisted motor is connected with an output shaft of the power-assisted motor, an output shaft of the speed reducing mechanism is connected with a screw rod of the push rod, and the moment output by the power-assisted motor pushes a rock arm shaft to rotate through a screw nut transmission pair. The electronic control unit is used for controlling the current of the power-assisted motor according to signals of the torque of the steering wheel and the vehicle speed and so on. The steering device can save energy, provide proper power assistance under various running work conditions, has fewer parts, light weight, compact structure and high assembly automatic degree, and is a steering mechanism of vehicle power with energy conservation, safety and environmental protection.
Description
Affiliated technical field
The invention belongs to technical field of automobile components, be specifically related to a kind of vehicle motor push rod type recirculating ball electric power-assisted steering apparatus.
Background technology
At present vehicle mainly divides two kinds of pinion and-rack and circulating ball types with deflector, and wherein rack and pinion steering gear is mainly used in manned vehicle, and ball-and-worm steering system is mainly used in commercial vehicle/comm..vehicle.Traditional power turns to and is hydraulic power steering, and the power-assisted size is controlled by guiding valve or rotary valve.There is following problem in the conventional hydraulic power steering: assist characteristic can not carry out real-time regulated and control with the speed of a motor vehicle, is difficult to coordinate the contradiction of low speed ease of steering and high speed steering " road feel "; Even do not turn to, oil pump is also worked always, has the no load losses of energy; Because hydraulic efficiency pressure system itself exists leakage of oil and maintenance issues, improved maintenance cost, and hydraulic oil can pollute also to environment.Elements such as oil pump, belt pulley, hydraulic tubing take up room bad layout; The low-temperature working poor-performing.
Electric boosting steering system (EPS) directly provide power-assisted by electrical motor, cancelled hydraulic efficiency pressure system, and system is made up of steering-wheel torque sensor, car speed sensor, controller, assisted electric machine and speed reduction gearing etc.Groundwork is that controller is accepted steering-wheel torque signal and vehicle speed signal, after judgement and handling, exports control signal according to prior definite good assist characteristic, control motor output booster torquemoment.Electric boosting steering system can well overcome the problem that hydraulic power steering exists, and has energy-conservationly, improves safety, helps many advantages such as environmental protection, and the trend that progressively replaces hydraulic power steering is arranged, and is one of developing direction of following power steering technology.But present worldwide electric boosting steering system also just is applied on the car, and all is rack and pinion steering gear.
The recirculating ball electric power steering does not still have product to occur at present, also is in development.The recirculating ball electric power steering is mainly used on the commercial vehicle/comm..vehicle, when the commercial vehicle/comm..vehicle front axle load is big, if motor and power-assisted mechanical device are directly installed in the deflector, the size of deflector is increased, and brings a series of problems such as heaviness and installation inconvenience.The present invention is the electric power-assisted steering apparatus of motor push rod type, its electric booster is not integrated in the deflector, but independent device, and connect mutually with pitman arm, directly power-assisted is acted on the pitman arm, make wheel steering by steering drag link, track arm again, reach power-steering effect.The present invention will reduce the deflector size greatly, have advantages such as light, simple.
Summary of the invention
The object of the present invention is to provide a kind of compact conformation, energy-efficient, low speed turn to light, the high speed steering road feel strong and return the good motor push rod type power-assisted steering apparatus of positive ability.
Above-mentioned purpose of the present invention is to realize that by such technical scheme promptly a kind of motor push rod type power-assisted steering apparatus comprises:
(1) ball-and-nut steering gear of band torque measuring device, torque sensing device is used for the moment of detection effect on steering handwheel, is arranged in the ball-and-nut steering gear input end.
(2) electric pushrod, an end of electric pushrod is connected with pitman arm in the recirculating ball steering swivel system, and the other end connects to ground.Electric pushrod comprises assisted electric machine and speed reduction gearing, push rod etc.The assisted electric machine is used to provide assisted diversion moment; The input end of speed reduction gearing connects with the assisted electric machine, plays reduction of speed and increases and turn round.
(3) electronic control unit (ECU) is used for according to signals such as the steering-wheel torque that collects, the speed of a motor vehicle, the dynamo-electric stream of control assisted electric.
Wherein, described assisted electric machine is permanent magnet brush DC motor or brushless, permanently excited direct current motor, and voltage form is DC24V or DC42V.
In the described electric pushrod, the input shaft of assisted electric machine speed reduction gearing is connected with assisted electric machine output shaft, and the output shaft of speed reduction gearing is connected with screw rod in the push rod.The moment of assisted electric machine output promotes rocker shaft and rotates by speed reduction gearing and bolt and nut transmission.
Be provided with a torsion bar in the described torque sensing device,, the distortion of torsion bar zoomed into angular transposition or displacement of the lines by the accurate mechanical device of a cover, the distortion that records torsion bar indirectly by angular transposition or linear movement pick-up, according to torsion bar rigidity get final product torque.
Described electronic control unit mainly is made up of CPU, acquisition of signal and treatment circuit, driving circuit, observation circuit etc.Wherein CPU is 8 or 16 micro controller systems, also can be 16 bit digital signal processors (DSP).Be provided with electronic switch in the motor drive circuit, after system occurred unusually, rapid cut-out switch was to guarantee security of system.
The invention has the beneficial effects as follows that only electrical motor just provides power-assisted (unlike hydraulic power steering, even when not turning to, oil pump is running always also) when turning to, thereby can reduce expenditure of energy; Suitable power-assisted can be provided under various driving cycles, reduce by the caused disturbance of Uneven road steering swivel system, improve the cornering properties of automobile, handling maneuver power when alleviating the automobile low speed driving, steering stability when improving galloping, and then the active safety of raising automobile, and can satisfy the different needs that use objects by the different hand-power characteristics that turns to is set; Cancelled oil pump, belt, belt pulley, hydraulic hose, hydraulic oil and sealing member etc., its part significantly reduces than hydraulic power steering, thereby lighter, the more compact structure of its quality, and is also easier aspect installation position selection, and can reduce noise; Do not have hydraulic circuit, than easier adjustment of hydraulic power steering and detection, the assembly automation degree is higher, and can be by different programs is set, can be fast and the different automobile types coupling, thereby can shorten production and time-to-market; There is not the oil impregnate problem, can reduces warranty costs greatly, reduce pollution environment; Has better low-temperature working performance than hydraulic power steering.
Description of drawings
Said structure of the present invention can be described further by drawings and Examples.
Fig. 1 is control principle figure of the present invention.
Fig. 2 is that steering system of the present invention is arranged scheme drawing.
Fig. 3 is the ball-and-nut steering gear constructional drawing that has torque-measuring apparatus of the present invention.
Fig. 4 is the electric pushrod constructional drawing that the present invention adopts.
Fig. 5 is the electronic control unit schematic diagram that the present invention adopts DC permanent magnet brush motor.
Among above-mentioned Fig. 2,1 is steering handwheel; 2 is steering shaft; 3 is steering inner articulated shaft; 4 is torque-measuring apparatus; 5 is ball-and-nut steering gear; 6 is pitman arm; 7 is push rod; 8 is steering drag link; 9 is track arm; 10 is steering trapezoidal arm; 11 is tierod; 12 is wheel; 13 is the assisted electric machine.
Among above-mentioned Fig. 3,1 is trundle; 2 is sliding sleeve; 3 is steel ball; 4 is input shaft; 5 is torsion bar; 6 is angular-motion transducer; 7 is screw rod; 8 is nut; 9 are the tooth fan; 10 is pitman arm.
Among above-mentioned Fig. 4,1 is the assisted electric machine; 2 is helical wheel I; 3 is helical wheel II; 4 is screw rod; 5 is nut; 6 is pin; 7 is push rod.
The specific embodiment
As shown in Figure 1, electronic control unit is according to the steering-wheel torque T that collects
sDetermine the target current Icmd of assisted electric machine with vehicle velocity V, actual current I and the target current Icmd according to the assisted electric machine carries out Tracking Feedback Control to the dynamo-electric stream of assisted electric then.
As shown in Figure 2, the principle of work of motor push rod type power-assisted steering apparatus is: when chaufeur rotates steering handwheel (1), the chaufeur applied moment is through steering shaft (2), steering inner articulated shaft (3) is delivered to the input shaft of ball-and-nut steering gear (5), input shaft at ball-and-nut steering gear (5) is provided with torque measuring device (4), torque measuring device (4) is given electronic control unit ECU with the chaufeur applied moment that records, ECU is according to this dtc signal and in conjunction with the suitable power-assisted square of assisted electric machine (13) output in the vehicle speed signal control electric pushrod, the power-assisted square of assisted electric machine (13) output is by speed reduction gearing and bolt and nut transmission, the promotion rocker shaft rotates, and reaches power-steering purpose with this.
As shown in Figure 3, one end of torsion bar (5) is connected with deflector input shaft (4), the other end and screw rod (7) interference fit is rigidly connected, the torsional deflection of torsion bar (5) passes to sliding sleeve (2) by steel ball (3), trundle (1) is rigidly connected with screw rod (7), and by cooperating with plug helix on the sliding sleeve (2), when sliding sleeve (2) rotates, generation moves axially, measure the axial internal clearance of sliding sleeve (2) by angular-motion transducer (6), the electric signal that the relative deformation of torsion bar (5) (being deflector input shaft (4) and the relative rotation of screw rod (7)) is converted to the expression torque inputs to electronic control unit (ECU).Screw rod (7) constitutes the recirculating ball transmission with nut (8).Tooth bar on the nut (8) is fanned (9) with the tooth on the sector shaft (being rocker shaft) and is meshed, and steering torque is exported.
As shown in Figure 4, the output shaft of assisted electric machine (1) is connected by key with helical wheel I (2), form speed reduction gearing through helical wheel II (3) and helical wheel I (2), playing slows down increases the effect of turning round, screw rod (4) is connected with helical wheel II (3), by the transmission of screw rod (4), nut (5), the circumferential rotation of change is moved into horizontal axis, by nut (5) power is passed to push rod (7) at last.
As shown in Figure 5, electronic control unit mainly is made up of CPU, acquisition of signal and treatment circuit, driving circuit, observation circuit etc.CPU is 8 or 16 micro controller systems, also can be 16 bit digital signal processors (DSP).Acquisition of signal and treatment circuit are used to gather the motor current signal, and handle dtc signal, vehicle speed signal, engine rotational speed signal etc.Driving circuit comprises the driving of electronic switch (as relay), status indicator lamp and electrical motor.Wherein the driving of electrical motor is a H type PwM circuit for power conversion, by MOSFET pipe G
1, G
2, G
3, G
4Form.The switch of MOSFET pipe is by the high-low level control of pwm signal, and the frequency of pwm signal is 20kHz.Also be provided with electronic switch (as relay) in the motor drive circuit, after system occurred unusually, rapid cut-out switch was to guarantee security of system.Observation circuit is used for system is protected, and improves the safe reliability of system.
Claims (3)
1. a motor push rod type power-assisted steering apparatus adopts recirculating ball-type steering gear, comprising:
(1) ball-and-nut steering gear of band torque measuring device.
(2) electric pushrod.
(3) electronic control unit (ECU).
It is characterized in that: in the ball-and-nut steering gear of band torque sensing device, torque sensing device is used for the moment of detection effect on steering handwheel, is arranged in the ball-and-nut steering gear input end; One end of electric pushrod is connected with pitman arm in the recirculating ball steering swivel system, and the other end connects to ground; Electric pushrod comprises assisted electric machine and speed reduction gearing, push rod; The assisted electric machine is used to provide assisted diversion moment; The input end of speed reduction gearing connects with the assisted electric machine, plays reduction of speed and increases and turn round; Electronic control unit is used for according to signals such as the steering-wheel torque that collects, the speed of a motor vehicle, the dynamo-electric stream of control assisted electric.
2. motor push rod type power-assisted steering apparatus according to claim 1, it also is characterised in that: when chaufeur rotates steering handwheel (1), the chaufeur applied moment is through steering shaft (2), steering inner articulated shaft (3) is delivered to the input shaft of ball-and-nut steering gear (5), input shaft at ball-and-nut steering gear (5) is provided with torque measuring device (4), torque measuring device (4) is given electronic control unit ECU with the chaufeur applied moment that records, ECU is according to this dtc signal and in conjunction with the suitable power-assisted square of assisted electric machine (13) output in the vehicle speed signal control electric pushrod, the power-assisted square of assisted electric machine (13) output is by speed reduction gearing and bolt and nut transmission, the promotion rocker shaft rotates, and reaches power-steering purpose with this.
3. electric pushrod according to claim 1 and 2, its feature also is: the output shaft of assisted electric machine (1) is connected by key with helical wheel I (2), form speed reduction gearing through helical wheel II (3) and helical wheel I (2), playing slows down increases the effect of turning round, screw rod (4) is connected with helical wheel II (3), by the transmission of screw rod (4), nut (5), the circumferential rotation of change is moved into horizontal axis, by nut (5) power is passed to push rod (7) at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101783615A CN101450677B (en) | 2007-11-29 | 2007-11-29 | Motor push rod type power-assisted steering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101783615A CN101450677B (en) | 2007-11-29 | 2007-11-29 | Motor push rod type power-assisted steering apparatus |
Publications (2)
| Publication Number | Publication Date |
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| CN101450677A true CN101450677A (en) | 2009-06-10 |
| CN101450677B CN101450677B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101783615A Active CN101450677B (en) | 2007-11-29 | 2007-11-29 | Motor push rod type power-assisted steering apparatus |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009686A (en) * | 2010-11-25 | 2011-04-13 | 南京航空航天大学 | Method for controlling power-assisted motor of electrical power-assisted steering system under intervention of active steering |
| CN102180194A (en) * | 2011-04-28 | 2011-09-14 | 南京航空航天大学 | Adaptive steering system of timely four-wheel drive electric wheel automobile and control method thereof |
| CN102303640A (en) * | 2011-04-07 | 2012-01-04 | 长春一汽四环汽车泵有限公司 | Controller of automotive electronic power steering (EPS) system |
| CN102416978A (en) * | 2011-11-04 | 2012-04-18 | 青岛理工大学 | Active steering system based on electric wheel power assisting |
| CN102501896A (en) * | 2011-11-23 | 2012-06-20 | 纪国庆 | Magnetic power-assisted steering device for vehicle |
| CN102632921A (en) * | 2012-04-23 | 2012-08-15 | 南京航空航天大学 | Electric drive pusher type steering system controlled by coupling force and displacement and control method |
| CN102673637A (en) * | 2012-05-10 | 2012-09-19 | 清华大学 | Electric power-assisted steering system for commercial vehicle |
| CN103192869A (en) * | 2012-01-09 | 2013-07-10 | 江苏罡阳动力转向器厂 | Recirculating ball electric power steering device with self-diagnosis function |
| CN103192870A (en) * | 2012-01-09 | 2013-07-10 | 江苏罡阳动力转向器厂 | Electric power steering controller |
| CN103496395A (en) * | 2013-10-09 | 2014-01-08 | 浙江达世元电动科技有限公司 | Electric steering system and electric steering control method for new-energy automobile |
| CN103562048A (en) * | 2011-05-24 | 2014-02-05 | Zf操作系统有限公司 | Electric power steering system |
| US8893846B2 (en) | 2013-02-13 | 2014-11-25 | Ford Global Technologies, Llc | Power assisted steering assembly |
| CN105313947A (en) * | 2014-05-30 | 2016-02-10 | 王科研 | Vehicle electric steering device |
| CN105667575A (en) * | 2015-12-30 | 2016-06-15 | 江苏靖江叉车有限公司 | Steering system for electric tractor |
| CN107023642A (en) * | 2016-02-01 | 2017-08-08 | 纳博特斯克有限公司 | Speed reducer |
| CN107914768A (en) * | 2017-10-27 | 2018-04-17 | 吉利四川商用车有限公司 | A kind of electric boosting steering system and its control method |
| CN108791478A (en) * | 2018-05-29 | 2018-11-13 | 王岚 | A kind of direct drive type electrohydraulic power steering stgear |
| CN109795548A (en) * | 2019-03-21 | 2019-05-24 | 石河子大学 | A kind of motor push rod type power steering apparatus |
| CN110871841A (en) * | 2019-12-16 | 2020-03-10 | 北京理工大学 | Push-down electric power steering device for commercial vehicle |
| WO2020111997A1 (en) * | 2018-11-28 | 2020-06-04 | Sentient Ip Ab | A power assisted steering system arrangement |
| CN112249152A (en) * | 2020-11-17 | 2021-01-22 | 安徽德孚转向系统股份有限公司 | Electric power steering system of large commercial vehicle and control method thereof |
| CN113147887A (en) * | 2021-04-16 | 2021-07-23 | 沙市久隆汽车动力转向器有限公司 | Pure electric steering system with safety redundancy for heavy commercial vehicle |
| CN113226890A (en) * | 2018-12-21 | 2021-08-06 | 蒂森克虏伯普利斯坦股份公司 | Power-assisted drive for a steering column and steering column for a motor vehicle |
| CN114633798A (en) * | 2022-03-22 | 2022-06-17 | 一汽解放汽车有限公司 | Electric power steering system and vehicle |
| WO2023019276A1 (en) * | 2021-08-13 | 2023-02-16 | China Automotive Systems, Inc. | Electric steering assemblies for commercial vehicles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068696U (en) * | 1990-05-18 | 1991-01-02 | 黄敦诚 | Electric pushing rod travel controller |
-
2007
- 2007-11-29 CN CN2007101783615A patent/CN101450677B/en active Active
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009686A (en) * | 2010-11-25 | 2011-04-13 | 南京航空航天大学 | Method for controlling power-assisted motor of electrical power-assisted steering system under intervention of active steering |
| CN102009686B (en) * | 2010-11-25 | 2013-01-09 | 南京航空航天大学 | Method for controlling power-assisted motor of electrical power-assisted steering system under intervention of active steering |
| CN102303640A (en) * | 2011-04-07 | 2012-01-04 | 长春一汽四环汽车泵有限公司 | Controller of automotive electronic power steering (EPS) system |
| CN102180194B (en) * | 2011-04-28 | 2012-10-24 | 南京航空航天大学 | Adaptive steering system of timely four-wheel drive electric wheel automobile and control method thereof |
| CN102180194A (en) * | 2011-04-28 | 2011-09-14 | 南京航空航天大学 | Adaptive steering system of timely four-wheel drive electric wheel automobile and control method thereof |
| CN103562048B (en) * | 2011-05-24 | 2016-04-06 | 罗伯特博世汽车转向有限公司 | Electricity power steering system |
| CN103562048A (en) * | 2011-05-24 | 2014-02-05 | Zf操作系统有限公司 | Electric power steering system |
| CN102416978A (en) * | 2011-11-04 | 2012-04-18 | 青岛理工大学 | Active steering system based on electric wheel power assisting |
| CN102501896A (en) * | 2011-11-23 | 2012-06-20 | 纪国庆 | Magnetic power-assisted steering device for vehicle |
| CN102501896B (en) * | 2011-11-23 | 2013-09-04 | 纪国庆 | Magnetic power-assisted steering device for vehicle |
| CN103192869A (en) * | 2012-01-09 | 2013-07-10 | 江苏罡阳动力转向器厂 | Recirculating ball electric power steering device with self-diagnosis function |
| CN103192870A (en) * | 2012-01-09 | 2013-07-10 | 江苏罡阳动力转向器厂 | Electric power steering controller |
| CN102632921A (en) * | 2012-04-23 | 2012-08-15 | 南京航空航天大学 | Electric drive pusher type steering system controlled by coupling force and displacement and control method |
| CN102673637A (en) * | 2012-05-10 | 2012-09-19 | 清华大学 | Electric power-assisted steering system for commercial vehicle |
| US8893846B2 (en) | 2013-02-13 | 2014-11-25 | Ford Global Technologies, Llc | Power assisted steering assembly |
| CN103496395A (en) * | 2013-10-09 | 2014-01-08 | 浙江达世元电动科技有限公司 | Electric steering system and electric steering control method for new-energy automobile |
| CN105313947A (en) * | 2014-05-30 | 2016-02-10 | 王科研 | Vehicle electric steering device |
| CN105667575A (en) * | 2015-12-30 | 2016-06-15 | 江苏靖江叉车有限公司 | Steering system for electric tractor |
| CN107023642A (en) * | 2016-02-01 | 2017-08-08 | 纳博特斯克有限公司 | Speed reducer |
| CN107023642B (en) * | 2016-02-01 | 2021-06-25 | 纳博特斯克有限公司 | Speed reducer |
| CN107914768A (en) * | 2017-10-27 | 2018-04-17 | 吉利四川商用车有限公司 | A kind of electric boosting steering system and its control method |
| CN108791478A (en) * | 2018-05-29 | 2018-11-13 | 王岚 | A kind of direct drive type electrohydraulic power steering stgear |
| WO2020111997A1 (en) * | 2018-11-28 | 2020-06-04 | Sentient Ip Ab | A power assisted steering system arrangement |
| US12091102B2 (en) | 2018-11-28 | 2024-09-17 | Sentient Ab | Power assisted steering system arrangement |
| US12103605B2 (en) | 2018-12-21 | 2024-10-01 | Thyssenkrupp Presta Ag | Power assistance drive for a steering column, and steering column for a motor vehicle |
| CN113226890A (en) * | 2018-12-21 | 2021-08-06 | 蒂森克虏伯普利斯坦股份公司 | Power-assisted drive for a steering column and steering column for a motor vehicle |
| CN113226890B (en) * | 2018-12-21 | 2023-06-06 | 蒂森克虏伯普利斯坦股份公司 | Power assist drive for a steering column of a motor vehicle |
| CN109795548A (en) * | 2019-03-21 | 2019-05-24 | 石河子大学 | A kind of motor push rod type power steering apparatus |
| CN110871841A (en) * | 2019-12-16 | 2020-03-10 | 北京理工大学 | Push-down electric power steering device for commercial vehicle |
| CN112249152A (en) * | 2020-11-17 | 2021-01-22 | 安徽德孚转向系统股份有限公司 | Electric power steering system of large commercial vehicle and control method thereof |
| CN112249152B (en) * | 2020-11-17 | 2024-01-30 | 安徽德孚转向系统股份有限公司 | Electric power steering system of large commercial vehicle and control method thereof |
| CN113147887B (en) * | 2021-04-16 | 2023-09-15 | 沙市久隆汽车动力转向器有限公司 | Pure electric steering system with safety redundancy for heavy commercial vehicle |
| CN113147887A (en) * | 2021-04-16 | 2021-07-23 | 沙市久隆汽车动力转向器有限公司 | Pure electric steering system with safety redundancy for heavy commercial vehicle |
| WO2023019276A1 (en) * | 2021-08-13 | 2023-02-16 | China Automotive Systems, Inc. | Electric steering assemblies for commercial vehicles |
| CN114633798A (en) * | 2022-03-22 | 2022-06-17 | 一汽解放汽车有限公司 | Electric power steering system and vehicle |
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