CN1283510C - Automobile electric power-assisted steering mechanism using magnetic sensitive torque sensor - Google Patents
Automobile electric power-assisted steering mechanism using magnetic sensitive torque sensor Download PDFInfo
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- CN1283510C CN1283510C CN 200410060901 CN200410060901A CN1283510C CN 1283510 C CN1283510 C CN 1283510C CN 200410060901 CN200410060901 CN 200410060901 CN 200410060901 A CN200410060901 A CN 200410060901A CN 1283510 C CN1283510 C CN 1283510C
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- steering
- steering gear
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Abstract
The present invention relates to an automobile electric power-assisted steering mechanism using a magnetic sensitive torque sensor. The purpose of the present invention is to provide an automobile electric power-assisted steering mechanism provided with a torque sensor which has simple structure. The present invention is composed of a steering wheel, a steering column, a universal driving device, a transverse pull rod, a servo dc motor, a speed reducing mechanism, an automobile speed detection unit for an automobile, an electronic control unit, etc. The present invention is characterized in that the steering torque sensor of an input part of a torque is composed of an exciting magnet part, a signal generator, etc., wherein the exciting magnet part is sheathed and fixed on an input part of the torque of the steering column, and the signal generator is sheathed and fixed on the output part of the torque of the steering column. The structure of the present invention is simple, and the variation of the present invention by the environmental influence is little.
Description
Technical field
The present invention is a kind of to adopt the automobile electric power-assisted steering mechanism of Mageneto-sensitive type torque sensor to relate to a kind of automobile electric power-assisted steering mechanism.
Background technology
Torque sensor in the present existing automobile electric power-assisted steering mechanism has four types usually: 1 variable resistance type; 2 differential transformer types; 3 photo-electrics; 4 electromagnetic types.These 4 kinds of torque sensor principle of work are obviously different with the present invention; Wherein electromagnetic type is to make opposite end have the steering handwheel imput shaft of backlash and driven shaft to be in the closed magnetic circuit that air gap arranged, when two when being turned to torque to relatively rotate, the backlash relative position changes changes the magnetic circuit magnetic resistance, thereby winding inductance quantity on the magnetic circuit changed and realizes torque sensing.These four kinds of sensors all exist constructional delails many, shortcomings such as mechanics requirement on machining accuracy height.
Summary of the invention
A kind of purpose of the automobile electric power-assisted steering mechanism of Mageneto-sensitive type torque sensor that adopts of the present invention provides a kind of automobile electric power-assisted steering mechanism with torque sensor simple in structure.The present invention is made of steering handwheel, Steering gear, universal driving device, intermediate rod and servo DC motor, speed reduction gearing, automobile speed detecting unit, electronic control unit etc., it is characterized in that: the Steering gear of mechanical steering gear is divided into two sections, constitutes torque input block and torque output block; The torque input block is captiveed joint with steering handwheel, be used for transmitting to be diverted wheel required turn to torque.The torque output block is connected with the wheel work that will turn to by universal driving device and rack-and-pinion steering gear.The input block and the output block of torque interconnect by torsion bar.The input block of described torque turns to torque sensor to be made up of exciting magnet parts and signal generator etc., three exciting magnets are housed in the wherein said exciting magnet parts, and two pole polarity in described three magnet are opposite with the pole polarity of the 3rd magnet.2 differential magneto sensors in the described signal generator parts in the magneto-dependent sensor assembly of dress are in respectively among the opposite external magnetic field of direction that three exciting magnets constitute.Described exciting magnet parts suit is fixed on the torque input block of Steering gear; The signal generator suit is fixed on the torque output block of Steering gear.During rotation, angular transposition takes place between the torque input block of Steering gear and the torque output block of Steering gear, then being fixed on 2 differential magneto sensors in the magneto-dependent sensor assembly on the torque input block experiences and is fixed on that commentaries on classics is opposite apart from 2 directions that the permanent magnet of output block produces, the linear change in equal-sized magnetic field, and output and the variation size of torque and the DC voltage change that direction has linear corresponding relation, output voltage signal after differential amplification: when steering handwheel clockwise rotated the torque increase, the output voltage linearity reduced or increases; When steering handwheel rotated counterclockwise the torque increase, the output voltage linearity increased or reduces.The differential characteristic of magneto-dependent sensor assembly can make the temperature drift of the output dc voltage that variation of ambient temperature causes reduce.There are brush or brushless servo DC motor to be arranged on the steering-column tube, auxiliary force footpath worm gear one worm gear box can be imposed on the torque output block by this electrical motor.Be used to obtain automobile speed detecting unit device at automobile instrument panel, perhaps be installed in other position that to detect the speed of a motor vehicle.A kind of automobile electric power-assisted steering mechanism structure of Mageneto-sensitive type torque sensor that adopts of the present invention is simple, and variation affected by environment is little.
Description of drawings
Figure one is a kind of structural representation that adopts the automobile electric power-assisted steering mechanism of Mageneto-sensitive type torque sensor of the present invention;
Figure two is a kind of Mageneto-sensitive type torque sensor structural representation that adopts the automobile electric power-assisted steering mechanism of Mageneto-sensitive type torque sensor of the present invention.
The specific embodiment
Shown in figure one, a kind of automobile electric power-assisted steering mechanism that adopts the Mageneto-sensitive type torque sensor of the present invention is divided into two sections with the Steering gear 2 of mechanical steering gear, constitutes the torque input block and changes apart from output block.The torque input block is captiveed joint with steering handwheel 1, be used for transmitting to be diverted wheel required turn to torque.The torque output block is connected with the wheel work that will turn to by universal driving device 3 and rack-and-pinion steering gear 4.The torque input block interconnects by torsion bar apart from output block with commentaries on classics.Electric power steering mechanism comprises pinion and-rack mechanical steering device 4, and the input end of rack-and-pinion steering gear is connected with steering handwheel 1 work by universal driving device 3 and Steering gear 2; Its mouth is connected with steered wheel work by the tierod 5,6 of both sides.Also can adopt other deflector steering hardware, for example the ball-and-nut steering device.Assisted power steering system is contained on the steering-column tube, can will turn to torque to be delivered to the wheel that will turn to from steering handwheel 1.Torque sensor 7 is used to detect steering handwheel 1 and acts on level of torque and direction on the torque input block, and torque sensor 7 devices are at the torque input block and change on output block, also can install other position at steering hardware.Described torque sensor 7 is the magnetosensitive torque sensor, comprise with torque input block bonded assembly signal generator parts and with change apart from output block bonded assembly exciting magnet parts, turn to the direction and the size of torque when obtaining motor turning, the torque detection signal is passed to electronic control unit 10.Servo DC motor 9 is arranged on the steering-column tube, is 90 ° or parallel installation with Steering gear, auxiliary force footpath worm gear one worm gear box 8 can be imposed on the torque output block by this electrical motor 9.Be used to obtain automobile speed detecting unit device 11 at automobile instrument panel, perhaps be installed in other position that to detect the speed of a motor vehicle, vehicle speed signal is passed to electronic control unit 10.Electronic control unit 10 obtain at that time steering state and the eigenwert of the speed of a motor vehicle, compare the output torque direction and the size at control motor 9 with the cornering properties curve of internal memory.
Shown in figure two, described signal generator parts 12 and exciting magnet parts 13 are set with on the driven shaft 15 of the imput shaft 14 that is fixed on Steering gear 2 and Steering gear 2.Be equipped with in the exciting magnet parts 13 exciting magnet 17,18,19,, the pole polarity of magnet 17 and magnet 19 is opposite with the pole polarity of magnet 18, and 2 differential magneto sensors 20 in the signal generator parts 12 in the magneto-dependent sensor assemblies 16 of dress and 21 are in respectively among the opposite external magnetic field of this both direction.
Claims (1)
1, a kind of automobile electric power-assisted steering mechanism of Mageneto-sensitive type torque sensor that adopts is made of steering handwheel, Steering gear, universal driving device, intermediate rod and servo DC motor, speed reduction gearing, automobile speed detecting unit, electronic control unit, it is characterized in that: the Steering gear of mechanical steering gear is divided into two sections, constitutes torque input block and torque output block; The torque input block is captiveed joint with steering handwheel, and the torque output block is connected with the wheel work that will turn to by universal driving device and rack-and-pinion steering gear; Torque input block and output block interconnect by torsion bar; Described torque input block is made up of exciting magnet parts and signal generator, and three exciting magnets are housed in the wherein said exciting magnet parts, and two pole polarity in described three magnet are opposite with the pole polarity of the 3rd magnet; 2 differential magneto sensors in the described signal generator parts in the magneto-dependent sensor assembly of dress are in respectively among the opposite external magnetic field of direction that three exciting magnets constitute; Described exciting magnet parts suit is fixed on the torque input block of Steering gear; The signal generator suit is fixed on the torque output block of Steering gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060901 CN1283510C (en) | 2004-09-22 | 2004-09-22 | Automobile electric power-assisted steering mechanism using magnetic sensitive torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060901 CN1283510C (en) | 2004-09-22 | 2004-09-22 | Automobile electric power-assisted steering mechanism using magnetic sensitive torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587941A CN1587941A (en) | 2005-03-02 |
| CN1283510C true CN1283510C (en) | 2006-11-08 |
Family
ID=34603622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410060901 Expired - Fee Related CN1283510C (en) | 2004-09-22 | 2004-09-22 | Automobile electric power-assisted steering mechanism using magnetic sensitive torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1283510C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009019890A1 (en) * | 2009-05-04 | 2010-11-11 | Trw Automotive Gmbh | Rack and pinion steering |
| CN101734280B (en) * | 2010-01-20 | 2011-06-08 | 宁波力达物流设备有限公司 | Electronically controlled steering device for forklift |
| CN102556157A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Front double-trapezoidal electric power steering mechanism |
| CN103727197A (en) * | 2013-12-18 | 2014-04-16 | 谢福存 | Swing-arm variable-pitch variable speed ratio device |
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2004
- 2004-09-22 CN CN 200410060901 patent/CN1283510C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1587941A (en) | 2005-03-02 |
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Granted publication date: 20061108 Termination date: 20120922 |