CN102589772A - Novel electric power steering system torque sensor - Google Patents
Novel electric power steering system torque sensor Download PDFInfo
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- CN102589772A CN102589772A CN2012100754090A CN201210075409A CN102589772A CN 102589772 A CN102589772 A CN 102589772A CN 2012100754090 A CN2012100754090 A CN 2012100754090A CN 201210075409 A CN201210075409 A CN 201210075409A CN 102589772 A CN102589772 A CN 102589772A
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- output shaft
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- steering system
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Abstract
A novel electric power steering system torque sensor comprises casings, a speed reduction mechanism, an output shaft, a torsion bar, an input shaft and a sensing part. The lower portion of the input shaft is installed on an upper casing through a bearing, a lower casing supports the lower portion of the output shaft through a bearing, and the input shaft is connected with the output shaft through the torsion bar, the sensing part of the sensor serves as the coinciding portion for installing the input shaft and the output shaft. In the sensing part, the tail end of the input shaft is embedded into a magnetic pole, a sensing ring retainer is installed at the upper portion of the output shaft, a sensing ring is embedded in the retainer, a magnetic line conveying ring is arranged on an outer ring of the sensing ring in matching mode, the magnetic line conveying ring is embedded in a support frame of the conveying ring, and the support frame of the conveying ring and the sensor are formed into a whole through a mould. Simultaneously, two support lugs extend from the magnetic line conveying ring and lead a magnetic line from the magnetic pole inside the sensor to the position of a socket. The novel electric power steering system torque sensor is good in integration performance, small in measurement errors, simple in real time compensation and capable of effectively reducing production cost and prolonging service life of associated equipment.
Description
Technical field
The present invention relates to a kind of torque sensor of automobile electric booster steering system, furtherly, is a kind of non-contact torque sensor structure.
Background technology
Automobile steering system is an important vehicle chassis component of automobile, involves the rideability of automobile.The performance of steering directly has influence on the control stability of automobile, and it reduces traffic hazard and protection driver's personal safety for the safety of guaranteeing vehicle, and alleviating driver's labour intensity has vital role.
Electric boosting steering system is a kind of power steering system that the power-assisted energy is provided by motor: when driver's steering wheel rotation; Torque sensor is started working; The displacement that relatively rotates that under the torsion bar effect, produces input shaft and output shaft becomes electric signal and passes to ECU (controller); ECU has size according to the sense of rotation and the power-assisted electric current of the signal deciding motor of vehicle speed sensor and torque sensor, thereby accomplishes real-time power-assisted 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 motor simultaneously, guarantees automobile light and flexible when low speed driving, reliable and stable when running at high speed.
The development of present domestic electric boosting steering system (Electronic Power Steering is called for short EPS) is rapid, and research and development manufacturing enterprise developed into tens family even last hundred families by several families in early 5 years.Because the raising of domestic automobile integral level proposes prior performance index and reliability requirement to EPS.Because the requirement to EPS safety and technology is very high; The big vitals (sensor and ECU) of in the EPS two is had higher requirement so; Because ECU controls the power-assisted size according to torque signal, the sensor that is in the signal source front end so requires just higher.
EPS mainly is made up of torque sensor, vehicle speed sensor, assist motor and reducing gear, ECU control module.The size of general EPS power-assisted is only relevant with the speed of a motor vehicle, the speed of a motor vehicle induction type of promptly often saying.External last century the nineties the EPS product in, particularly the manufacturer of Japan is many is main with touch sensor, domestic early stage or even present most of manufacturer all still be the sensor of contact of employing; The sensor that has only the domestic production producer employing magneto-electric of only a few, and EPS sensor development both domestic and external has presented the state that all sorts of flowers contend at the initial stage in this century, and magneto-electric is arranged; Photo-electric; Reluctance type, Hall-type etc., and just multiply two or three kind of structure with regard to the magneto-electric principle.Therefore, development advanced person's EPS sensor has far-reaching influence to the development of EPS industry.
Summary of the invention
The technical matters that the present invention solved is to provide a kind of novel electric boosting steering system torque sensor, and this torque sensor structural volume is little, simple in structure.In process of production, make things convenient for the sensor zeroing, thereby use simply, reduced manufacturing cost.Make things convenient for car load to arrange, reduced installing space, with low cost.
The technical matters that the present invention solved adopts following technical scheme to realize:
A kind of novel electric boosting steering system torque sensor comprises: housing, reducing gear, output shaft, torsion bar, input shaft and sensing element, wherein; Housing comprises upper shell and lower house two parts; Reducing gear is installed in the end of sensor, and connects output shaft, and the output shaft front end connects input shaft; On upper shell, lower house is then through bearings output shaft bottom through Bearing Installation in the input shaft bottom; Said output shaft hollow, input shaft rear portion hollow, both center sections connect through torsion bar; Simultaneously, the input shaft rear portion also has the column type groove, and column type groove internal diameter is as the criterion output shaft being inserted; Make output shaft and input shaft after assembling is accomplished, can partially overlap in its junction.
The sensing element of sensor then is installed in the intersection of input shaft and output shaft, and is enclosed in the upper shell, comprises magnetic pole, inductance loop, Hall element and sensor.Said magnetic pole embeds the input the tip of the axis; Be the equally distributed magnetic pole of the magnetic line of force, the terminal intersection of the top of output shaft and input shaft cooperates the inductance loop retainer is installed; Embedded the inductance loop of soft magnet material in the retainer, the inductance loop belt edge has toothing; Be combined with the magnet-wire transmission ring in the inductance loop outer ring; The magnet-wire transmission ring is embedded in the transmission ring bracing frame through Shooting Technique; Transmission ring bracing frame and sensor socket are made of one through mould; And the magnet-wire transmission ring is extended with two journal stirrups, is inserted with hall device between two journal stirrups, is used for being drawn out to the sensor socket place to the magnetic line of force from the sensor internal magnetic pole.
Whole transducing part utilizes Hall element to detect the magnetic field and the variation thereof of the intersection of input shaft and output shaft, connects sensor plug at the Hall element rear portion, and through sensor socket torque signal is outputed on the external treatment device.
In the present invention, because magnetic pole is N/S the two poles of the earth alternative arrangement, therefore, said inductance loop should comprise two up and down; And the profile of tooth of the toothing of two inductance loops should stagger up and down, simultaneously, the magnet-wire transmission ring also be about two; Form two magnetic line of force closed loops like this, because electric power steering torsion bar left-right rotation angle is ± 4 °, so in rotating ± 4 °; Dull increasing of two flux loop, dull a minimizing is in order to reduce error in data-gathering process.
In the present invention; Hall element is the programmable hall element, and simultaneously, its underpart also is connected with a control circuit board; Thereby after inducing the input torque size; With two flux loop process processing of circuit, the main road voltage of output transducer characteristic and bypass voltage, and the monotonicity of two-way characteristic is opposite.
Beneficial effect of the present invention is:
1. the invention enables each part of sensor to be embedded on interior each part of EPS reducer shell, make each part of sensor break the whole up into parts, reduced the supporting structure of housing of sensor own and relevant sensing element like this.Make cost reduce, smaller volume, advantages such as storage part minimizing;
2. be embedded in magnet on the input shaft, make endless belt dentation wringing fit to the magnetic induction parts and install on the output shaft.When the driver imported a moment of torsion, the torsion bar up and down input shaft that connects of two ends and output shaft will the output relative angular displacement, makes that like this induced field is even.Because steering column is because the error of making causes after using certain hour, can producing enough end play, adopting input shaft to be uniformly distributed with the method for magnetic pole will be not too responsive to end play;
3. patent of the present invention adopts programmable hall, and integrated external circuit and single-chip microcomputer, Hall components and parts one reduce external disturbance.Owing to adopt the programmable hall device, so torque sensor centering is in real time promptly adjusted the sensor zero point current potential, but also real-Time Compensation change more simple.The gap compensation that causes comprising temperature and alignment error;
4. whole sensor is installed separately mechanical part, magnetic line of force sensing part and programmable hall device, circuit board section, has formed the inside and outside part of sensor separately, key component and common separately, the parts that easily worn part and reliable parts separate.Because mechanical part, magnetic line of force induction noncontact is not fragile, and electron device burns out after through long-time the use or lost efficacy on the programmable hall device, circuit board; Programmable hall device and circuit board are made on the plug; And mechanical part, magnetic line of force sensing part are placed on (in the reducer shell) in the socket, if electron device break, as long as the replacing plug; And dismounting is simple, can not touch the mechanical part in the reducer shell.Maintenance cost is low.
Description of drawings
Fig. 1 is the synoptic diagram of preferred embodiment of the present invention.
Fig. 2 is the sensor plug schematic cross-section of preferred embodiment of the present invention.
Fig. 3 is the local amplification assumption diagram of the sensor of preferred embodiment of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
Preferred embodiment referring to a kind of novel electric boosting steering system torque sensor of Fig. 1; Bearing Installation is passed through on upper shell 1 in its input shaft 9 bottoms; Lower house 3 is then through bearings output shaft 2 bottoms; When at input shaft 9 input torques,, will produce differential seat angle between output shaft 2 and the input shaft 9 because torsion bar 4 is flexible members.After producing differential seat angle, just have changes of magnetic field between magnetic pole 8 and the inductance loop 6, because magnetic pole 8 is distributed on the circumference of input shaft 9 bottoms; And N/S is interspersed; The inductance loop 6 that is installed on the output shaft 2 through transmission ring bracing frame 10 also is the interleaved circle distribution, in limited angle, when ring magnetic field increases on the inductance loop 6; 6 times rings of inductance loop magnetic field reduces; Be delivered to the magnetic line of force on the transmission ring bracing frame 10 through magnet-wire transmission ring 7, just be incorporated into magnetic field on the sensor socket 14 simultaneously, when sensor plug 12 inserts sensor socket; Because programmable hall device 11 is included in the sensor plug with circuit board 13; Programmable hall device 11 is just disposed in the magnetic field, because the variation in magnetic field will cause the variation of programmable hall device 11 output voltages, through the stable sensor moment of torsion magnitude of voltage of processing output of circuit board 13.
When not having the moment of torsion input, the magnetic field of magnetic field in the sensor and inductance loop 6 and magnet-wire transmission ring 7 keeps a constant value constant, and in transferring through oversampling circuit plate 13 (zeroing), the torque sensor output voltage values is zero.
In order to save installing space, simplified structure simultaneously, in the present embodiment; Be embedded in magnetic pole 8 on the input shaft 9 and input shaft 9 has a style of one's own, inductance loop 6 is ensconced in the inductance loop retainer 5 through injection moulding; Inductance loop retainer 5 is installed with output shaft 2 wringing fits, and transmission ring bracing frame 10 is made of one with sensor socket 14, and transmission ring bracing frame 10 is also inlayed within it on the ring; The journal stirrup of magnet-wire transmission ring 7 stretches out in sensor socket 14; Be included in programmable hall device 11 and circuit board 13 on the sensor plug 12, after inserting sensor socket 14 to sensor plug 12, whole flux loop has just been set up.Handle the back with regard to output transducer moment of torsion magnitude of voltage through the interlock circuit on the circuit board 13.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (5)
1. novel electric boosting steering system torque sensor; Comprise housing, reducing gear, output shaft, torsion bar, input shaft and sensing element, it is characterized in that housing comprises upper shell and lower house two parts; Reducing gear is installed in the terminal of sensor and connects output shaft; The output shaft front end connects input shaft, and on upper shell, lower house is then through bearings output shaft bottom through Bearing Installation in the input shaft bottom; Said output shaft hollow, input shaft rear portion hollow, both center sections connect through torsion bar; Simultaneously, the input shaft rear portion also has the column type groove, and column type groove internal diameter is as the criterion output shaft being inserted; Make output shaft and input shaft after assembling is accomplished, can partially overlap in its junction; The sensing element of sensor then is installed in the intersection of input shaft and output shaft, and is enclosed in the upper shell, comprises magnetic pole, inductance loop, Hall element and sensor.
2. a kind of novel electric boosting steering system torque sensor according to claim 1 is characterized in that, in the said sensing element; Magnetic pole embeds the input the tip of the axis; Be the equally distributed magnetic pole of the magnetic line of force, the terminal intersection of the top of output shaft and input shaft cooperates the inductance loop retainer is installed; Embedded the inductance loop of soft magnet material in the retainer, the inductance loop belt edge has toothing.
3. a kind of novel electric boosting steering system torque sensor according to claim 1; It is characterized in that; Be combined with the magnet-wire transmission ring in the inductance loop outer ring, the magnet-wire transmission ring is embedded in the transmission ring bracing frame through Shooting Technique, and transmission ring bracing frame and sensor socket are made of one through mould; And the magnet-wire transmission ring is extended with two journal stirrups, is inserted with hall device between two journal stirrups.
4. a kind of novel electric boosting steering system torque sensor according to claim 1 is characterized in that, said inductance loop should comprise two up and down, and the profile of tooth of the toothing of two inductance loops should stagger up and down.
5. a kind of novel electric boosting steering system torque sensor according to claim 1 is characterized in that said Hall element is the programmable hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210075409 CN102589772B (en) | 2012-03-21 | 2012-03-21 | Electric power steering system torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210075409 CN102589772B (en) | 2012-03-21 | 2012-03-21 | Electric power steering system torque sensor |
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| CN102589772A true CN102589772A (en) | 2012-07-18 |
| CN102589772B CN102589772B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210075409 Active CN102589772B (en) | 2012-03-21 | 2012-03-21 | Electric power steering system torque sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466664A (en) * | 2018-05-11 | 2019-11-19 | 坎培诺洛有限公司 | It is provided with the bicycle assembly parts of temperature-compensating stress/strain sensor |
| CN110653992A (en) * | 2018-06-29 | 2020-01-07 | 长城汽车股份有限公司 | Torque sensor housing and method of manufacturing the same |
| US11377169B2 (en) | 2018-05-11 | 2022-07-05 | Campagnolo S.R.L. | Bicycle crankarm and related crankset |
| US11401002B2 (en) | 2018-05-11 | 2022-08-02 | Campagnolo S.R.L. | Bicycle crankarm having a stress/strain detector for a torque meter or a power meter, and methods for manufacturing and using the crankarm |
| US11547004B2 (en) | 2018-05-11 | 2023-01-03 | Campagnolo S.R.L. | Bicycle component made of composite material and related manufacturing process |
| US11597469B2 (en) | 2018-05-11 | 2023-03-07 | Campagnolo S.R.L. | Bicycle crankarm provided with electric/electronic system |
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| CN1433514A (en) * | 1999-12-04 | 2003-07-30 | 罗伯特-博希股份公司 | Sensor system for detecting angle of rotation and/or torque |
| CN2927017Y (en) * | 2006-06-30 | 2007-07-25 | 上海自动化仪表股份有限公司 | Torque-inspecting mechanism of electric executing mechanism |
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| CN201096565Y (en) * | 2007-09-04 | 2008-08-06 | 刘海平 | Electric motor-assisted vehicle moment sensing device |
| CN201983887U (en) * | 2010-12-09 | 2011-09-21 | 天津市松正电动汽车技术股份有限公司 | Non-contact torque sensor and electric power-assisted steering system |
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| CN1433514A (en) * | 1999-12-04 | 2003-07-30 | 罗伯特-博希股份公司 | Sensor system for detecting angle of rotation and/or torque |
| JP2002272076A (en) * | 2001-03-06 | 2002-09-20 | Kofu Meidensha:Kk | Direct drive brushless motor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466664A (en) * | 2018-05-11 | 2019-11-19 | 坎培诺洛有限公司 | It is provided with the bicycle assembly parts of temperature-compensating stress/strain sensor |
| US11214331B2 (en) | 2018-05-11 | 2022-01-04 | Campagnolo S.R.L. | Bicycle component provided with a temperature-compensated stress/strain sensor |
| US11377169B2 (en) | 2018-05-11 | 2022-07-05 | Campagnolo S.R.L. | Bicycle crankarm and related crankset |
| US11401002B2 (en) | 2018-05-11 | 2022-08-02 | Campagnolo S.R.L. | Bicycle crankarm having a stress/strain detector for a torque meter or a power meter, and methods for manufacturing and using the crankarm |
| US11547004B2 (en) | 2018-05-11 | 2023-01-03 | Campagnolo S.R.L. | Bicycle component made of composite material and related manufacturing process |
| US11577801B2 (en) | 2018-05-11 | 2023-02-14 | Campagnolo S.R.L. | Bicycle component provided with a temperature-compensated stress/strain sensor |
| US11597469B2 (en) | 2018-05-11 | 2023-03-07 | Campagnolo S.R.L. | Bicycle crankarm provided with electric/electronic system |
| CN110653992A (en) * | 2018-06-29 | 2020-01-07 | 长城汽车股份有限公司 | Torque sensor housing and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102589772B (en) | 2013-12-18 |
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Effective date of registration: 20210207 Address after: 412000 Room 201, 100 Hangkong Road, Lusong District, Zhuzhou City, Hunan Province Patentee after: Hunan Dongjia Intelligent Technology Co.,Ltd. Address before: Dong Jia Duan High-tech Industrial Park in Hunan province Zhuzhou city Lusong District 412000 Patentee before: ZHUZHOU ELITE ELECTRO MECHANICAL Co.,Ltd. |