CN104702083A - Voice coil motor and linear displacement sensor integrated structure - Google Patents
Voice coil motor and linear displacement sensor integrated structure Download PDFInfo
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- CN104702083A CN104702083A CN201310670764.7A CN201310670764A CN104702083A CN 104702083 A CN104702083 A CN 104702083A CN 201310670764 A CN201310670764 A CN 201310670764A CN 104702083 A CN104702083 A CN 104702083A
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- voice coil
- coil motor
- sensor
- stator
- screw
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Abstract
The invention belongs to a motor and sensor integrated design technology, and relates to a voice coil motor and linear displacement sensor integrated structure. The voice coil motor and linear displacement sensor integrated structure comprises a voice coil motor rotor, a voice coil motor stator, a sensor movable core and a sensor stator. The sensor stator is fixed on the voice coil motor stator, the sensor movable core is connected with the voice coil motor rotor, so that a voice coil motor and a sensor are integrated, mutual interferences between main magnetic fields of the voice coil motor and the sensor are avoided, and the zero position of the travel of the sensor can be adjusted flexibly and then can be superposed to the zero position of the travel of the voice coil motor. The linear displacement sensor is integrated in the voice coil motor, the size of a system is reduced, the reliability is improved, mutual interferences of the magnetic field of the voice coil motor and the magnetic field of the sensor are avoided, the position of the voice coil motor rotor can be measured directly through the sensor, the position measurement precision is improved, and the voice coil motor and the linear displacement sensor are integrated.
Description
Technical field
The invention belongs to motor and sensor integration designing technique, relate to the integral structure of a kind of voice coil motor and linear movement pick-up.
Background technology
As linear servo-actuator, voice coil motor have positioning precision high, respond fast advantage, obtain in elaborate servo control field and use widely.In servo system in the past, voice coil motor and linear movement pick-up have employed separated structure, linear movement pick-up and voice coil motor are linked together by mechanical structures such as feed screw nuts, the servo system structure of this structure is complicated, volume is comparatively large, cost is high, constrains the utilization of voice coil motor in servo closed control system.Voice coil motor is carried out integrated with linear movement pick-up, the defect of separate structure can be overcome, but general integrated morphology, the mutual interference between motor and the main field of transducer cannot be avoided, because the operating magnetic field flux density of voice coil motor is much larger than the operating magnetic field flux density of transducer, this interference is inaccurate by what cause linear movement pick-up to be measured.The present invention makes linear movement pick-up be integrated in voice coil motor inside, reduce the volume of system, add reliability, avoid the mutual interference of voice coil motor and sensor magnetic field simultaneously, and the direct measurement of voice coil motor rotor position can be realized by transducer, improve positional accuracy measurement, achieve the integrated of voice coil motor and linear movement pick-up.
Summary of the invention
The object of the invention is: the integral structure proposing a kind of voice coil motor and linear movement pick-up.
Technical scheme of the present invention is: the integral structure of a kind of voice coil motor and linear movement pick-up, it is characterized in that, this structure comprises nut 1, nut 22, the dynamic iron core 3 of transducer, voice coil motor mover 4, fastening spiro loop 5, sensor stator 6, sensor jacket 7, screw 1, screw 29, screw 3 10, screw 4 11, voice coil motor stator 12.
Nut 1 and nut 22 are fixed on voice coil motor mover 4 by dynamic for transducer unshakable in one's determination 3; Sensor stator 6 is fixed in sensor jacket 7 by fastening spiro loop 5; It is inner that sensor jacket 7 is fixed on voice coil motor stator 12 by screw 1, screw 29, screw 3 10, screw 4 11; Voice coil motor stator 12 and voice coil motor mover 4 keep coaxial and load in voice coil motor mover 4.
Advantage of the present invention is: the present invention makes linear movement pick-up be integrated in voice coil motor inside, reduce the volume of system, add reliability, avoid the mutual interference of voice coil motor and sensor magnetic field simultaneously, and the direct measurement of voice coil motor rotor position can be realized by transducer, improve positional accuracy measurement, achieve the integrated design of voice coil motor and linear movement pick-up.
Accompanying drawing explanation
Fig. 1 is the integral structure schematic diagram of a kind of voice coil motor and linear movement pick-up;
Wherein, 1: nut one, 2: nut two, 3: the dynamic iron core of transducer, 4: voice coil motor mover, 5: fastening spiro loop, 6: sensor stator, 7: sensor jacket, 8: screw one, 9: screw two, 10: screw three, 11: screw four, 12: voice coil motor stator.
Embodiment
Elaborate to the present invention below in conjunction with Figure of description, see Fig. 1, it is the integral structure schematic diagram of a kind of voice coil motor of the present invention and linear movement pick-up.The integral structure of described a kind of voice coil motor and linear movement pick-up is characterized in that comprising: the dynamic iron core 3 of nut 1, nut 22, transducer, voice coil motor mover 4, fastening spiro loop 5, sensor stator 6, sensor jacket 7, screw 1, screw 29, screw 3 10, screw 4 11, voice coil motor stator 12.
Nut 1 and nut 22 are fixed on voice coil motor mover 4 by dynamic for transducer unshakable in one's determination 3; Sensor stator 6 is fixed in sensor jacket 7 by fastening spiro loop 5; It is inner that sensor jacket 7 is fixed on voice coil motor stator 12 by screw 1, screw 29, screw 3 10, screw 4 11; Voice coil motor stator 12 and voice coil motor mover 4 keep coaxial and load in voice coil motor mover 4.
Embodiment
Transducer is moved unshakable in one's determination 3 and is fixed on voice coil motor mover 4 by the mode of screw threads for fastening by nut 1 and nut 22, adopts nut 1 and nut 22 double nut can improve the pretightning force of screw threads for fastening, increases the effect of screw threads for fastening; There is ring-shaped step the side, inside of sensor jacket 7, is blocked the right side of sensor stator 6, then lock onto in sensor jacket 7 with fastening spiro loop 5 by the left side of sensor stator 6; It is inner that sensor jacket 7 is fixed on voice coil motor stator 12 by screw 1, screw 29, screw 3 10, screw 4 11; Voice coil motor stator 12 and voice coil motor mover 4 keep coaxial and load in voice coil motor mover 4.
The operation principle of the integral structure of a kind of voice coil motor of the present invention and linear movement pick-up is: voice coil motor mover 4 and voice coil motor stator 12 linear relative movement can occur, and transducer dynamic unshakable in one's determination 3 also can produce linear relative movement with sensor stator 6, transducer dynamic unshakable in one's determination 3 keeps immobilizing with voice coil motor mover 4 relative position simultaneously, sensor stator 6 and voice coil motor stator 12 relative position also keep immobilizing, therefore, transducer moves unshakable in one's determination 3 relative shifts produced relative to sensor stator 6 and just equals the relative shift that voice coil motor mover 4 produces relative to voice coil motor stator 12, the displacement that so sensor measurement obtains just equals the displacement of voice coil motor, and the zero-bit of trip sensor can be moved unshakable in one's determination 3 distances screwing in voice coil motor movers 4 by transducer and carries out flexible, it is made to overlap with the zero-bit of voice coil motor stroke, what so just achieve on voice coil motor and sensor construction is integrated, larger than the magnetic flux density of transducer 65 ~ 72 times of the magnetic flux density of voice coil motor simultaneously, if unreasonable structure, then the main field of voice coil motor is bound to form interference to the main field of transducer, sensor signal is caused to measure distortion, therefore the magnet steel of voice coil motor mover 4 of the present invention adopts axial charging, the magnet steel external diameter of gap ratio voice coil motor mover 4 of the magnet steel internal diameter of voice coil motor mover 4 and the envelope outer diameter of sensor stator 6 and large 2 ~ 3 times of the spacing of the internal diameter of outer cover of voice coil motor mover 4, the material of the sensor jacket 7 between the magnet steel of voice coil motor mover 4 and the shell of sensor stator 6 is non-magnet material, because magnetic circuit path follows magnetic resistance minimum principle, therefore the magnetic line of force of the magnet steel of voice coil motor mover 4 is not substantially by sensor stator 6, doing so avoids the interference that voice coil motor main field is formed sensor main magnetic field.
The present invention makes linear movement pick-up be integrated in voice coil motor inside, reduce the volume of system, add reliability, avoid the mutual interference of voice coil motor and sensor magnetic field simultaneously, and the direct measurement of voice coil motor rotor position can be realized by transducer, improve positional accuracy measurement, achieve the integrated design of voice coil motor and linear movement pick-up.
Claims (1)
1. the integral structure of a voice coil motor and linear movement pick-up, it is characterized in that, this structure comprises nut one (1), nut two (2), transducer dynamic (3), voice coil motor mover (4) unshakable in one's determination, fastening spiro loop (5), sensor stator (6), sensor jacket (7), screw one (8), screw two (9), screw three (10), screw four (11), voice coil motor stator (12); Dynamic for transducer (3) unshakable in one's determination are fixed on voice coil motor mover (4) by nut one (1) and nut two (2); Sensor stator (6) is fixed in sensor jacket (7) by fastening spiro loop (5); It is inner that sensor jacket (7) is fixed on voice coil motor stator (12) by screw one (8), screw two (9), screw three (10), screw four (11); Voice coil motor stator (12) and voice coil motor mover (4) keep coaxial and load in voice coil motor mover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670764.7A CN104702083B (en) | 2013-12-10 | 2013-12-10 | A kind of integral structure of voice coil motor and linear movement pick-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670764.7A CN104702083B (en) | 2013-12-10 | 2013-12-10 | A kind of integral structure of voice coil motor and linear movement pick-up |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104702083A true CN104702083A (en) | 2015-06-10 |
| CN104702083B CN104702083B (en) | 2017-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310670764.7A Active CN104702083B (en) | 2013-12-10 | 2013-12-10 | A kind of integral structure of voice coil motor and linear movement pick-up |
Country Status (1)
| Country | Link |
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| CN (1) | CN104702083B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133181A1 (en) * | 2016-02-01 | 2017-08-10 | 深圳市科曼医疗设备有限公司 | Voice coil motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635499A (en) * | 2008-07-25 | 2010-01-27 | 日立汽车系统株式会社 | Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same |
| CN102005891A (en) * | 2010-11-10 | 2011-04-06 | 河南理工大学 | Single-phase alternating current permanent magnet linear disk type oscillating motor |
| CN102087905A (en) * | 2010-11-05 | 2011-06-08 | 深圳市亚欣电器制造有限公司 | Voice coil electromagnet |
| CN102948047A (en) * | 2010-05-11 | 2013-02-27 | 西门子公司 | Drive device for rotational and linear movements with decoupled inertias |
-
2013
- 2013-12-10 CN CN201310670764.7A patent/CN104702083B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635499A (en) * | 2008-07-25 | 2010-01-27 | 日立汽车系统株式会社 | Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same |
| CN102948047A (en) * | 2010-05-11 | 2013-02-27 | 西门子公司 | Drive device for rotational and linear movements with decoupled inertias |
| CN102087905A (en) * | 2010-11-05 | 2011-06-08 | 深圳市亚欣电器制造有限公司 | Voice coil electromagnet |
| CN102005891A (en) * | 2010-11-10 | 2011-04-06 | 河南理工大学 | Single-phase alternating current permanent magnet linear disk type oscillating motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133181A1 (en) * | 2016-02-01 | 2017-08-10 | 深圳市科曼医疗设备有限公司 | Voice coil motor |
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| Publication number | Publication date |
|---|---|
| CN104702083B (en) | 2017-12-19 |
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