CN1891553A - Mounting structure of contactless torque angle sensor for electric booster steering system - Google Patents

Mounting structure of contactless torque angle sensor for electric booster steering system Download PDF

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Publication number
CN1891553A
CN1891553A CN 200610027085 CN200610027085A CN1891553A CN 1891553 A CN1891553 A CN 1891553A CN 200610027085 CN200610027085 CN 200610027085 CN 200610027085 A CN200610027085 A CN 200610027085A CN 1891553 A CN1891553 A CN 1891553A
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CN
China
Prior art keywords
sensor
torque
output shaft
stator
input shaft
Prior art date
Application number
CN 200610027085
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Chinese (zh)
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CN100554064C (en
Inventor
卓桂荣
陈慧
余卓平
郑鸿云
周珑
Original Assignee
上海燃料电池汽车动力系统有限公司
万钢
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Application filed by 上海燃料电池汽车动力系统有限公司, 万钢 filed Critical 上海燃料电池汽车动力系统有限公司
Priority to CNB2006100270858A priority Critical patent/CN100554064C/en
Publication of CN1891553A publication Critical patent/CN1891553A/en
Application granted granted Critical
Publication of CN100554064C publication Critical patent/CN100554064C/en

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Abstract

This invention discloses an installation structure of a non-contact torque corner sensor on an electromotive assisting turning system including a non-contact torque corner sensor, a turning input shaft, a turning output shaft, a shell of a worm wheel and rod deceleration box, a sensor bottom cover, a top cover of a sensor, a wrest rod, a nylon pressing cover, in which, the rotor of the torque sensor is tightly connected with the input shaft of the turning shaft and pressed by the nylon pressing cover, the stator of which, namely the rotor of the corner sensor is fixedly connected with turning output shaft pressed by the nylon cover, the stator of the corner sensor is fixedly connected with the worm wheel and worm rod deceleration box shell by the bottom cover, the input shaft is connected with the output shaft by the wrest rod and an angle limitation is set between the torque corner sensor and the output shaft.

Description

The mounting structure of contactless torque angle sensor on electric boosting steering system
Technical field
The present invention relates to the mounting structure of a kind of automobile pipe column booster type electric servo steering system (C-EPS) upper sensor, specifically, relate to a kind of mounting structure of contactless torque/rotary angle transmitter.
Background technology
The motor turning performance is one of main performance of automobile; the performance of steering swivel system directly has influence on the road-holding property of automobile, and it plays an important role for the safety traffic of guaranteeing vehicle, the personal safety that reduces traffic accident and protection chaufeur, the service conditions of improving chaufeur.In order to improve turning efficiency, generally adopted power steering system at present: hydraulic power-assist steering system, electric liquid servo steering system, electric boosting steering system (being called for short EPS).Electric boosting steering system because of its energy-conserving and environment-protective, simple in structure, be easy to maintenance, the strong returnability of servo-actuated is good and assist characteristic is easy to advantages such as control, becomes the main flow trend of current automobile steering system.
EPS is a kind of power steering system that auxiliary torque directly is provided by motor.Dissimilar EPS groundworks are identical: torque sensor and steering shaft link together, when steering shaft rotates, torque sensor is started working, the displacement that relatively rotates that input shaft and output shaft are produced under the torsion bar effect becomes electric signal and passes to ECU, EUC has size according to the hand of rotation and the power-assisted electric current of the signal deciding electrical motor of car speed sensor and torque sensor, thereby finishes real-time servo-steering control.Therefore it can be implemented in the speed of a motor vehicle does not at an easy rate provide different power-assisted effects by electrical motor simultaneously, guarantees automobile light and flexible when low speed driving, reliable and stable when running at high speed.Therefore the design of EPS cornering properties has higher degree of freedom.
EPS mainly is made up of torque sensor, car speed sensor, assist motor and speed reduction gearing, ECU control unit.The general power-assisted size of EPS is only relevant with the speed of a motor vehicle, i.e. the speed of a motor vehicle induction type of often saying.But development along with EPS, assist characteristic is more than relevant with the speed of a motor vehicle also relevant with steering wheel angle, so abroad the EPS of some middle and high shelves automobiles has also installed rotary angle transmitter except that torque sensor has been installed, thereby change assist characteristic significantly, improved the traveling comfort that turns to and improved returnability.And the torque sensor of integrated outer corner measurement has become the important component part of EPS.
The function of torque sensor is that the measurement chaufeur acts on moment size and the direction on the steering handwheel, and the size and Orientation of steering wheel angle.These signals all are the control signals of EPS.Torch measuring system more complicated and cost are higher, so accurately, reliably, can torque sensor be one of decision EPS key factor that dominate the market cheaply.Torque sensor is the key sensor of EPS, mainly contains contact and contactless two kinds.
What at present contact was used morely is the potentiometer type torque sensor, contactlessly uses morely to be induction, photo-electric and ultrasonic type torque sensor.The contact cost is lower, but easily drifted about by temperature and effect of attrition, service life is lower, need compromise to accuracy of manufacture and torsion bar rigidity, is difficult to realize the measurement of absolute corner and cireular frequency.Contactless survey precision height, antijamming capability are strong, the measurement of the rigidity absolute corner of higher relatively, easy realization and cireular frequency.
Summary of the invention
The present invention will provide the mounting structure of a kind of contactless torque angle sensor on electric boosting steering system.Noncontacting proximity sensor in this structure is compared with touch sensor, and higher survey precision is arranged, higher durability, higher reliability, shorter lag effect and wider field of application, and have simple in structure, easy-to-install characteristics.
Technical scheme of the present invention is: the mounting structure of a kind of contactless torque angle sensor on electric boosting steering system, comprise the contactless torque rotary angle transmitter, turn to input shaft, turn to output shaft, the worm reduction box housing, the sensor bottom end cover, the sensor upper end cover, torsion bar, the nylon gland, the rotor of torque sensor cooperates to be fixed by the nylon gland with the input shaft of steering shaft and is connected, the stator of torque sensor be rotary angle transmitter rotor with turn to output shaft also to cooperate to be fixed to be connected by the nylon gland, the rotary angle transmitter stator is captiveed joint with the worm reduction box housing by the sensor bottom end cover, and input shaft links to each other by torsion bar with output shaft, and it is spacing to be provided with angle between torque angle sensor and the output shaft.
Induction contactless torque rotary angle transmitter, stator and rotor are made by magnetic material, form closed magnetic circuit between stator and the rotor, and rotary angle transmitter stator and torque sensor stator are fixed together.
Angle between torque angle sensor and the output shaft spacing fan-shaped side surface and output shaft upper end rectangular side surface composition by the input shaft bottom.
Nylon gland and input shaft, output shaft, the torque sensor rotor, the cooperation between the torque sensor stator is an interference fit;
Realize cooperating by the elastic deformation of nylon gland claw between the torque sensor rotor, torque sensor stator and nylon gland.
The fan-shaped side D1 of the bottom of input shaft is parallel with face D3, and face D2 is parallel with face D4, and all with respect to the axis symmetry of input shaft; The rectangle sides E1 of the upper end of output shaft and face E4 coplane, face E2 and face E3 coplane, face E1, E4 and face E2, E3 is with respect to the axis symmetry of output shaft.
Input shaft, torsion bar, output shaft are on the same axial line.
The invention has the beneficial effects as follows: compare touch sensor, noncontacting proximity sensor has higher survey precision, higher durability (can not wear and tear) because of the time, higher reliability (realization of multiple redundancy), shorter lag effect and wider field of application (can adjust measurement range) according to user's request.Therefore the EPS of equipped with non-contact sensor has higher reliability, durability etc.Because the present invention is on the physical construction basis of existing C-EPS, to improving with the relevant assembling interface of torque sensor, therefore, have simple in structure, easy-to-install characteristics.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is 1 A-A cutaway view;
Fig. 3 is the inhibiting device cutaway view;
Fig. 4 is a nylon gland open end front elevation;
Fig. 5 is the cutaway view of bowing of Fig. 4.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, the mounting structure of a kind of contactless torque angle sensor on electric boosting steering system, by the contactless torque rotary angle transmitter, turn to input shaft 1, turn to output shaft 11, worm reduction box housing 8, sensor bottom end cover 4, sensor upper end cover 3, torsion bar 9, nylon gland 6, nylon gland 15 formations such as grade.
The rotor 14 of torque sensor is fixed by nylon gland 15 with the input shaft 1 of steering shaft and is connected, and the stator 13 of torque sensor is that the rotor 12 of rotary angle transmitter is also captiveed joint by nylon gland 6 force fit with turning to output shaft 11.
Wherein, nylon gland 6,15 structure is (as Fig. 4, shown in 5), face G respectively with input shaft 1 or 11 interference fit of output shaft, and the rotor 14 of the face F portion of nylon gland 15,6 and torque sensor and stator 13 also adopt interference fit, because face F portion is cut into four pawl types, interference fit is mainly finished by the elastic deformation of face F portion, therefore also in the dismounting and the installation of sensor.
Torsion bar 9 of input shaft 1 and output shaft 11 middle installations is placed copper sheathing 5 between torsion bar 9 and the input shaft 1, the other end of torsion bar 9 is connected with output shaft 11 usefulness straight pins 10; Back-up ring 7 is installed in output shaft 11 shaft shoulder places, and rotary angle transmitter stator 12 is fixing by semicircle muscle B and sensor bottom end cover 4, with bolt sensor bottom end cover 4 is connected with 8 assemblings of worm reduction box housing; Mounting bracket 2 is in the same place with sensor upper end cover 3 and sensor bottom end cover 4 usefulness Bolt Connection.
When turning to, chaufeur direction of passage dish input torque, torsion bar 9 distortion, cause that input shaft 1 and output shaft 11 relative positions change, thereby the respective change of magnetic flow between the rotor 14 of drive torque sensor and the stator 13, if the logical alternating current of going up of coil, the end of coil is pressed the change of the influence coefficient that causes along with moment of torsion and is changed, and changes thereby can measure corresponding torque.Chaufeur is by turning to input shaft 1, torsion bar 9 transfer torques to turning to output shaft 11, turn to output shaft 11 to rotate thereby drive, turning to output shaft 11 to drive the rotary angle transmitter rotor is that torque sensor stator 13 relative rotation sensors 12 rotate, cause the respective change of magnetic flow between rotary angle transmitter rotor 1 and the rotary angle transmitter stator 12, the coil indirect current, the end of coil is pressed the change of the influence coefficient that causes along with angle and is changed, and changes thereby can measure corresponding absolute angle.
Turn to the fan-shaped side surface of input shaft 1 bottom and the spacing angle that the angle between rectangular side surface, output shaft 11 upper end is torque sensor.
The inhibiting device of torque angle sensor (as Fig. 2, shown in Figure 3).In Fig. 3, turn to the fan-shaped side D1 of input shaft 1 bottom parallel with face D3, face D2 is parallel with face D4; Output shaft 11 upper end rectangle sides E1 and E4 coplanes, face E2 and face E3 coplane.Angle between face D1/ face E1, face D2/ face E2, face D3/ face E3, face D4/ face E4 is identical, and is the spacing angle of permission of torque sensor.To guarantee during installation that input shaft 1, torsion bar 9 and output shaft 11 are coaxial.Face D1 and face D3, face D2 and face D4, face E1E4 and face E2E3 are all with respect to the axis symmetry of input shaft 1 and output shaft 11.
When torsion bar 9 was out of shape in allowing spacing angular range, input shaft 1 passed to output shaft 11 by torsion bar 9 with moment of torsion; Torsion bar 9 distortion that cause when moment of torsion exceed when allowing spacing angular range, face D1/ face E1, face D3/ face E3 (or face D2/ face E2, face D4/ face E4) contact, promptly turn to the fan-shaped side surface of input shaft 1 bottom to contact with the rectangular side surface of output shaft 11 upper ends, input shaft 1 directly passes to output shaft 11 by the surface of end face with moment of torsion.
Noncontacting proximity sensor corner detection range 3 circles of the present invention, no to scale will be damaged sensor; Torque sensor will be demarcated its zero-bit when mounted simultaneously, therefore will pay special attention to installation method and sequence of erection when mounted.Its concrete installation steps are as follows:
(1) torsion bar 9 is pressed into turns to input shaft 1, and carry out the detection and the adjustment of right alignment;
(2) copper sheathing 5 is located turning on the output shaft, and the other end and the output shaft 11 of torsion bar 9 assembled, adjust the right alignment of input shaft 1, torsion bar 9 and output shaft 11, after satisfying the requirement of right alignment, adjust that angle equates between input shaft 1 and output shaft 11 each confined planes, join the brill cylinder pin hole, and straight pin 10 is installed;
(3) worm gear is fitted on the output shaft 11, and input shaft 1/ output shaft 11 that turns to that will be equipped with worm gear is located in worm reduction box housing 8;
(4) back-up ring 7 is installed in output shaft 11 shaft shoulder places, sensor bottom end cover 4 and worm reduction box housing 8 is assembled together with bolt;
(5) nylon gland 6 is installed in turns on the output shaft 11, guarantee that its end face is concordant with back-up ring 7 end faces;
(6) rotary angle transmitter stator 12 is mounted together when sensor dispatches from the factory with torque sensor stator 13, inseparable, therefore this step is with while installing angle sensor stator 12 and torque sensor stator 13, at first the semicircle muscle B on the rotary angle transmitter stator 12 is embedded in the half slot of sensor bottom end cover 4, then rotary angle transmitter stator 12 is fixing by semicircle muscle B and sensor bottom end cover 4, little upper surface of firmly depressing torque sensor stator 13, make its upper surface concordant, represent that promptly torque sensor stator 13 is fixing by nylon gland 6 with sensor bottom end cover 4;
(7) mounting torque rotor sensor 14 to input shaft 1 shaft shoulder is fixed, and with sensor energize, and with two-way torque signal introducing oscp, rotary torque rotor sensor 14 overlaps the two-way torque signal, and be the zero point of torque sensor this moment;
(8) nylon gland 15, the rotor 14 of even twisting moment sensor are installed;
(9) mounting bracket 2 and sensor upper end cover 3 and sensor bottom end cover 4 usefulness Bolt Connection are in the same place;
(10) after sensor installs, when the steering column telescopic tube is installed, need contactless torque/rotary angle transmitter is carried out the angle Zero positioning.Calibration method is as follows: turns to input shaft 1 to either direction, (promptly feels rotation effort slightly) to its interior angle mechanical position limitation place, and then contrarotation 1.5 circles, this position can be decided to be the angle zero-bit of rotary angle transmitter.Rotary angle transmitter can be defined as any point electric signal zero point, carries out the angle zeroing this moment just in order in use not destroy the angle mechanical position limitation of sensor internal, so approximate zeroing this moment does not need very accurate.

Claims (7)

1. the mounting structure of a contactless torque angle sensor on electric boosting steering system, comprise the contactless torque rotary angle transmitter, turn to input shaft (1), turn to output shaft (11), worm reduction box housing (8), sensor bottom end cover (4), sensor upper end cover (3), it is characterized in that, also comprise torsion bar (9), nylon gland (6), nylon gland (15), the rotor of torque sensor (14) is captiveed joint by nylon gland (15) force fit with the input shaft (1) of steering shaft, the stator of torque sensor (13) is that the rotor (12) of rotary angle transmitter is captiveed joint by nylon gland (6) force fit with turning to output shaft (11), rotary angle transmitter stator (12) is captiveed joint with worm reduction box housing (8) by sensor bottom end cover (4), and input shaft (1) links to each other by torsion bar (9) with output shaft (11), and it is spacing to be provided with angle between torque angle sensor and the output shaft (11).
2. the mounting structure of contactless torque angle sensor according to claim 1 on electric boosting steering system, it is characterized in that, stator and rotor in the described contactless torque rotary angle transmitter are made by magnetic material, form closed magnetic circuit between stator and the rotor; Rotary angle transmitter stator (12) is captiveed joint with torque sensor stator (13).
3. the mounting structure of contactless torque angle sensor according to claim 1 on electric boosting steering system, it is characterized in that the angle between described torque angle sensor and the output shaft (11) spacing fan-shaped side surface and output shaft (11) upper end rectangular side surface composition by input shaft (1) bottom.
4. the mounting structure of contactless torque angle sensor according to claim 1 on electric boosting steering system, it is characterized in that, described nylon gland (6,15) with input shaft (1), output shaft (11), torque sensor rotor (14), the cooperation between the torque sensor stator (13) is an interference fit.
5. the mounting structure of contactless torque angle sensor according to claim 1 on electric boosting steering system is characterized in that, described input shaft (1), torsion bar (9), output shaft (11) are on the same axial line.
6. the mounting structure on electric boosting steering system according to claim 1 or 3 described contactless torque angle sensors, it is characterized in that, the fan-shaped side (D1) of the bottom of described input shaft (1) is parallel with face (D3), face (D2) is parallel with face (D4), and all with respect to the axis symmetry of input shaft (1); The rectangle sides (E1) of the upper end of output shaft (11) and face (E4) coplane, face (E2) and face (E3) coplane, face (E1, E4) and face (E2 is E3) with respect to the axis symmetry of output shaft.
7. the mounting structure of contactless torque angle sensor according to claim 4 on electric boosting steering system, it is characterized in that, described torque sensor rotor (14), realize cooperating by the elastic deformation of nylon gland claw between torque sensor stator (13) and the nylon gland (15,6).
CNB2006100270858A 2006-05-30 2006-05-30 The mounting structure of contactless torque angle sensor on electric boosting steering system CN100554064C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006100270858A CN100554064C (en) 2006-05-30 2006-05-30 The mounting structure of contactless torque angle sensor on electric boosting steering system

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Application Number Priority Date Filing Date Title
CNB2006100270858A CN100554064C (en) 2006-05-30 2006-05-30 The mounting structure of contactless torque angle sensor on electric boosting steering system

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CN1891553A true CN1891553A (en) 2007-01-10
CN100554064C CN100554064C (en) 2009-10-28

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700399A (en) * 2012-05-31 2012-10-03 杭州电子科技大学 Wheel hub motor driven electric automobile
CN103206942A (en) * 2013-03-20 2013-07-17 昌辉汽车电器(黄山)股份公司 Angle and torque transducer assembly for automobile electric power steering
CN104139799A (en) * 2013-05-07 2014-11-12 株式会社捷太格特 Torque detector and electric power steering system including the torque detector
CN104210531A (en) * 2013-05-28 2014-12-17 Zf操作系统有限公司 Steering transmission device with torsion bar structure, steering system provided with the same, and installation method
CN105575211A (en) * 2016-01-20 2016-05-11 合肥同智机电控制技术有限公司 Steering wheel feedback apparatus
CN105628075A (en) * 2014-11-06 2016-06-01 深圳迈瑞生物医疗电子股份有限公司 Sensor mounting base structure, oxygen concentration sensing device and respiratory device
CN108128352A (en) * 2010-05-14 2018-06-08 Trw汽车美国有限责任公司 Torque sensing device assembly and its manufacturing method
CN110356473A (en) * 2019-07-24 2019-10-22 重庆长安汽车股份有限公司 A kind of vehicle redundancy rotation angular sensing system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102530051B (en) * 2010-12-21 2014-07-16 重庆长风机器有限责任公司 Tubular column type electric power steering column employing novel torque sensor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108128352A (en) * 2010-05-14 2018-06-08 Trw汽车美国有限责任公司 Torque sensing device assembly and its manufacturing method
CN102700399A (en) * 2012-05-31 2012-10-03 杭州电子科技大学 Wheel hub motor driven electric automobile
CN102700399B (en) * 2012-05-31 2015-04-01 杭州电子科技大学 Wheel hub motor driven electric automobile
CN103206942A (en) * 2013-03-20 2013-07-17 昌辉汽车电器(黄山)股份公司 Angle and torque transducer assembly for automobile electric power steering
CN104139799B (en) * 2013-05-07 2017-12-01 株式会社捷太格特 Torque detecting apparatus and the electric power-assisted steering apparatus for possessing the device
CN104139799A (en) * 2013-05-07 2014-11-12 株式会社捷太格特 Torque detector and electric power steering system including the torque detector
CN104210531A (en) * 2013-05-28 2014-12-17 Zf操作系统有限公司 Steering transmission device with torsion bar structure, steering system provided with the same, and installation method
CN105628075A (en) * 2014-11-06 2016-06-01 深圳迈瑞生物医疗电子股份有限公司 Sensor mounting base structure, oxygen concentration sensing device and respiratory device
CN105628075B (en) * 2014-11-06 2019-11-15 深圳迈瑞生物医疗电子股份有限公司 A kind of sensor installation seat structure, oxygen concentration sensing device and breathing apparatus
CN105575211A (en) * 2016-01-20 2016-05-11 合肥同智机电控制技术有限公司 Steering wheel feedback apparatus
CN110356473A (en) * 2019-07-24 2019-10-22 重庆长安汽车股份有限公司 A kind of vehicle redundancy rotation angular sensing system

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