CN202709991U - Detection device for absolute-type multi-circle rotation angle - Google Patents
Detection device for absolute-type multi-circle rotation angle Download PDFInfo
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- CN202709991U CN202709991U CN 201220332846 CN201220332846U CN202709991U CN 202709991 U CN202709991 U CN 202709991U CN 201220332846 CN201220332846 CN 201220332846 CN 201220332846 U CN201220332846 U CN 201220332846U CN 202709991 U CN202709991 U CN 202709991U
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Abstract
The utility model provides a detection device for an absolute-type multi-circle rotation angle, comprising a casing body, a cover plate and a rotation shaft, wherein the rotation shaft is arranged in the casing body; a main gear is fixedly arranged on the rotation shaft; the main gear engages with a driven gear with a smaller number of teeth; the driven gear comprises a large driven gear and a small driven gear; the main gear is in external gearing with the large driven gear; a two-stage speed reduction device, enabling the rotation shaft to rotate multiple circles and slow down to the speed of a bull gear rotating just one circle, is connected to the driven gear; the driven gear and the bull gear are respectively provided with a bearing; a magnet is arranged in each of the bearings and the two magnets are respectively and relatively fixed together with the driven gear and the bull gear; the upper edges of the bearings cling to a PCB, an angle sensing chip fixed on the PCB is arranged above the magnets and the angle sensing chip is separated from the upper surfaces of the magnets at a fixed distance; and the cover plate is fixed on the casing body, and the casing body cooperates with the cover plate to fix the position of the PCB. The rotation angle obtained from the detection of the device is high in resolution ratio, reliability and stability.
Description
Technical field
This practicality relates to detection rotational angle technical field, particularly a kind of pick-up unit of absolute type multi-turn rotational angle.
Background technology
The pick-up unit of rotational angle is applied to multiple industry at present, especially detects in the electric machine rotation angle, the angle of industrial knob position detection and automobile industry probe vehicle rotating of steering wheel etc.But present technical scheme still has following defective: a kind of situation is as having disclosed the object corner of rotatable unnecessary 360 degree of a kind of detection among the patent CN1090315C.This scheme is to realize respectively at the relativeness of the follower gear of main drive gear external toothing and rotational angle separately by two.The error of 2 follower gears all is introduced into and participates in calculating in the computation process, and precision, resolution, zero point drift and the nonlinear fluctuation meeting of analyzing rotational angle from performance perspective are more serious.Because algorithm is complicated, Systems balanth depends on that not only sensor also depends on other digital-to-analog conversions, the stability of the unit such as single-chip microcomputer totalizer.In addition to final user's environment for use in certain requirement is installed, it is relatively high to produce wrong probability.The second situation is to realize two output of pulse signals by a kind of use photovoltaic principals or hall principle, draws rotational angle by the impulse phase relation.This refitting is put and detection method can't be carried out the sign record at zero point on the output signal, must power on to re-start the identification at zero point by custom system after resuming work at every turn.The resolution of its pick-up unit depends on the rotational angle that the individual pulse cycle is corresponding in addition, the number of pulse need to evenly distribute in 360 degree scopes, the hole that each pulse is corresponding or the tooth mechanical distribution in 360 degree scopes is limited, installation environment is narrow and small, size is limited, so the highest resolution of this pick-up unit can only reach 0.5 degree.When rotational angle during less than resolution, without effective angle output, and rotation direction is that sequencing by two pulses determines, so the rotation direction None-identified.Such angle detection device also easily causes the phenomenon of pulse missing, so that finally without correct rotational angle output.
Summary of the invention
The purpose of this utility model is to provide a kind of pick-up unit of absolute type multi-turn rotational angle, the resolution that can Effective Raise multi-turn angle detects, so that the angle signal of output directly be absolute angle, and the reliability and stability of raising output angle.
For addressing the above problem, the utility model relates to a kind of pick-up unit of absolute type multi-turn rotational angle, comprise housing, cover plate, turning axle, turning axle places housing, be fixed with main drive gear on the turning axle, between main drive gear and the turning axle without relative rotation and axially-movable, follower gear comprises driven gear wheel and driven pinion wheel, main drive gear and driven gear wheel external toothing, the number of teeth of driven gear wheel is less than main drive gear, therefore the angle of driven gear wheel has improved the resolution of pick-up unit through amplification, reduces the size of whole pick-up unit.Follower gear is provided with and the turning axle multi-turn is rotated decelerate to number of turns gear and number of turns gear only revolves the double reduction gear that turns around, and velocity of rotation is slowed down in two steps.Be equipped with bearing at follower gear and number of turns gear, all be fixed with magnet in the bearing, two magnet are relative with number of turns gear with follower gear fixing respectively, bearing coboundary and pcb board fit, be fixed in angle induction chip on the pcb board and be positioned at the magnet top, angle induction chip and the magnet upper surface fixed range of being separated by.When magnet rotated, the magnetic direction of its surface is thereupon rotation also.Be positioned at the variation that the angle induction chip of magnet top is sensed magnetic direction, the angle value that the output magnetic direction changes.This angle value is the angle value that magnet rotates, and this angle value is the angle that gear rotates simultaneously.This kind angle induction chip can be reluctance type, Hall-type.Detect the follower gear of gained and the angle that number of turns gear rotates, the absolute angle that the turning axle that need detect through system's computing output rotates through according to the angle induction chip.Cover plate is fixed on the housing, and housing and cover plate are fixed the pcb board position.On the one hand because therefore pcb board to the compression of gear, on the other hand because of the support of housing to gear, has guaranteed effectively that the relative position of follower gear, number of turns gear, transmission gear immobilizes, help to improve accuracy of detection.
Preferably, double reduction gear can comprise middle transition gear and number of turns gear, the middle transition gear comprises middle transition gear wheel and middle transition pinion wheel, and the middle transition gear wheel is in driven pinion wheel external toothing, middle transition pinion wheel and the external toothing of number of turns gear.
Preferably, double reduction gear can comprise rack-and-pinion and number of turns gear, and rack-and-pinion comprises up and down two-layer gear, is respectively gear wheel and pinion wheel, wherein gear wheel and driven pinion wheel external toothing, pinion wheel and the external toothing of number of turns gear.
Preferably, double reduction gear is number of turns gear, engagement in driven pinion wheel and the number of turns gear.
Preferably, housing is provided with bearing holder (housing, cover), and main drive gear, follower gear, middle excessively gear, number of turns gear all are fixed in the bearing holder (housing, cover).Be provided with floor in the housing, also be provided with floor on the cover plate.Cover plate is fixed on the housing and is provided with floor one facing to enclosure interior.Pcb board is subject to floor two sides clamping on housing inner rib plate and the cover plate in housing, fit with the bearing coboundary that guarantees itself and follower gear and number of turns gear, thereby guarantee to be fixed in angle induction chip on the pcb board and the bearing internal magnet upper surface fixed range of being separated by.
Preferably, also be provided with staircase structure on the main drive gear, this staircase structure contacts with housing when main drive gear assembles with the pick-up unit housing, erects certain altitude between main drive gear and housing, avoids main drive gear to produce friction with housing in rotary course.
Preferably, magnet rush magnetic direction for radially, a pair of N/S magnetic pole is only arranged, the magnet shaft terminad is boss structure.This structure makes magnet can not occur axially to collect together and rotate play in follower gear and number of turns gear in the situation that does not affect the distribution of the inner magnet line of force, and the position is fixed.
Preferably, angle induction chip and the magnet upper surface fixed range of being separated by is between 0.2mm to 3mm.The too small then present position of this fixed range high intensity magnetic field, the excessive then present position of fixed range magnetic field intensity is excessively low, may cause the angle induction chip to work.
Preferably, the angular range of angle induction chip output is that 0 degree is to 360 degree.
Compared with prior art, the utility model has the advantages that:
(1) the utility model proposes the pick-up unit of a kind of high precision and high-resolution absolute type multi-turn rotational angle, use this device, detect rotational angle resolution to 0.007 degree of gained, and the angle precision of finally output only depends on the precision of follower gear.Along with the raising of resolution and precision, device the non-linear repeatability at zero point when repeating to power on all increases substantially.
The pick-up unit of a kind of absolute type multi-turn rotational angle that (2) the utility model proposes, the angle value that rotates when outage does not need storage, re-powers the current absolute rotation angle of remaining of rear output, and is user-friendly.
The pick-up unit of a kind of absolute type multi-turn rotational angle that (3) the utility model proposes has improved the reliability and stability of output angle.
Description of drawings
In conjunction with the following drawings, specify the technical solution of the utility model:
Fig. 1 has shown the Facad structure figure of the utility model embodiment 1 enclosure interior;
Fig. 2 has shown the structure figure of the utility model embodiment 1 enclosure interior;
Fig. 3 has shown the utility model embodiment 1 shell structure figure;
Fig. 4 has shown the utility model embodiment 1 structural representation;
Fig. 5 has shown the structural representation of the utility model embodiment 2 enclosure interior;
Fig. 6 has shown the structural representation of the utility model embodiment 3 enclosure interior;
Embodiment
Embodiment 1
Such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the pick-up unit of a kind of absolute type multi-turn rotational angle that the utility model is related, comprise housing 1, cover plate 2, turning axle 3, turning axle 3 places in the housing 1, be fixed with main drive gear 4 on the turning axle 3, also be provided with staircase structure 41 on the main drive gear 4, its little follower gear 5 engagements of main drive gear 4 and gear ratio, follower gear 5 comprises driven gear wheel 51 and driven pinion wheel 52, main drive gear 4 and driven gear wheel 51 external toothings, be connected with double reduction gear on the follower gear 5, this double reduction gear comprises number of turns gear 61 and middle transition gear 62, middle transition gear 62 comprises middle transition gear wheel 621 and middle transition pinion wheel 622, middle transition gear wheel 621 and driven pinion wheel 52 external toothings, driven pinion wheel 52 numbers of teeth are carried out the first step with velocity of rotation and are slowed down less than middle transition gear wheel 621 numbers of teeth.Middle transition pinion wheel 622 and 61 external toothings of number of turns gear, middle transition pinion wheel 622 numbers of teeth carry out second step with velocity of rotation and slow down less than number of turns gear 61 numbers of teeth.Turning axle 3 multi-turns are rotated and to be decelerated to number of turns gear 61, and 61 of number of turns gears revolve and turn around.Be equipped with bearing 8 at follower gear 5 and number of turns gear 61, in bearing 8, be equipped with magnet 9.Magnet 9 rush magnetic direction for radially, a pair of N/S magnetic pole is only arranged, magnet 9 axial end are boss structure.Two magnet 9 are relative fixing with follower gear 5 and number of turns gear 61 respectively, and the angle induction chip 7 that is fixed on the pcb board 10 is positioned at magnet 9 tops, and the angular range of angle induction chip 7 outputs is between 0 degree is spent to 360.Angle induction chip 7 and the magnet 9 upper surfaces fixed range of being separated by, this fixed range is between 0.2mm to 3mm.When magnet 9 rotation, the magnetic direction of its surface is thereupon rotation also.Be positioned at the variation that the angle induction chip 7 of magnet 9 tops is sensed magnetic direction, the angle value that the output magnetic direction changes.This angle value is the angle value that magnet rotates, and this angle is the angle of follower gear 5 and 61 rotations of number of turns gear simultaneously.Be provided with bearing holder (housing, cover) 11 in the housing 1, main drive gear 4, follower gear 5, middle excessively gear 62, number of turns gear 61 all are fixed in the bearing holder (housing, cover) 11.Be provided with floor in the housing 1, also be provided with floor on the cover plate 2.Cover plate 2 is fixed on the housing 1 and is provided with floor one facing to housing 1 inside.Pcb board 10 is subject to floor two sides clamping on housing inner rib plate and the cover plate in housing 1, guaranteeing that itself and follower gear 5 and the bearing coboundary of number of turns gear 61 fit, thereby guarantee to be fixed in angle induction chip 7 and bearing internal magnet 9 upper surfaces on the pcb board 10 fixed range of being separated by.
As shown in Figure 5, as different from Example 1, the double reduction gear 6 of the pick-up unit of a kind of absolute type multi-turn rotational angle that the utility model is related comprises number of turns gear 61 and rack-and-pinion 63, rack-and-pinion 63 comprises up and down two-layer gear, be respectively gear wheel 631 and pinion wheel 632, wherein gear wheel 631 and driven pinion wheel 52 external toothings, driven pinion wheel 52 numbers of teeth are carried out the first step with velocity of rotation and are slowed down less than gear wheel 631 numbers of teeth.Pinion wheel 632 and 61 external toothings of number of turns gear, pinion wheel 632 numbers of teeth carry out second step with velocity of rotation and slow down less than number of turns gear 61 numbers of teeth.The turning axle multi-turn is rotated and to be decelerated to number of turns gear 61 and 61 of number of turns gears and revolve and turn around.
As shown in Figure 6, the double reduction gear 6 of the pick-up unit of the related a kind of absolute type multi-turn rotational angle of the utility model is number of turns gear 61 as different from Example 1, driven pinion wheel 52 and the 61 interior engagements of number of turns gear.Driven pinion wheel 52 numbers of teeth are less than number of turns gear 61 numbers of teeth.The turning axle multi-turn is rotated and to be decelerated to number of turns gear 61, and 61 of number of turns gears revolve and turn around.
Claims (9)
1. the pick-up unit of an absolute type multi-turn rotational angle, comprise housing, cover plate, turning axle, turning axle places in the housing, it is characterized in that being fixed with on the turning axle main drive gear, its the little follower gear engagement of main drive gear and gear ratio, follower gear comprises driven gear wheel and driven pinion wheel, main drive gear and driven gear wheel external toothing, be connected with on the follower gear and the turning axle multi-turn rotated decelerate to number of turns gear and number of turns gear only revolves the double reduction gear that turns around, be equipped with bearing at follower gear and number of turns gear, be equipped with magnet in the bearing, two magnet are relative with number of turns gear with follower gear fixing respectively, and bearing coboundary and pcb board fit, the angle induction chip that is fixed on the pcb board is positioned at the magnet top, angle induction chip and the magnet upper surface fixed range of being separated by, cover plate is fixed on the housing, and housing and cover plate are fixed the pcb board position.
2. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1, it is characterized in that described double reduction gear comprises middle transition gear and number of turns gear, the middle transition gear comprises middle transition gear wheel and middle transition pinion wheel, middle transition gear wheel and driven pinion wheel external toothing, middle transition pinion wheel and the external toothing of number of turns gear.
3. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1, it is characterized in that described double reduction gear is rack-and-pinion and number of turns gear, rack-and-pinion comprises up and down two-layer gear, be respectively gear wheel and pinion wheel, wherein gear wheel and driven pinion wheel external toothing, pinion wheel and the external toothing of number of turns gear.
4. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1 is characterized in that described double reduction gear is number of turns gear, engagement in driven pinion wheel and the number of turns gear.
5. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1 and 2, it is characterized in that being provided with bearing holder (housing, cover) in the described housing, main drive gear, follower gear, middle excessively gear, number of turns gear all are fixed in the bearing holder (housing, cover), be provided with floor in the housing, also be provided with floor on the cover plate, cover plate is provided with floor one facing to enclosure interior.
6. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1 is characterized in that also being provided with on the described main drive gear staircase structure.
7. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1, what it is characterized in that described magnet rushes magnetic direction for radially, and a pair of N/S magnetic pole is only arranged, and the magnet shaft terminad is boss structure.
8. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1 is characterized in that fixed range that described angle induction chip and magnet upper surface be separated by is between 0.2mm to 3mm.
9. the pick-up unit of a kind of absolute type multi-turn rotational angle according to claim 1 is characterized in that the angular range that described angle induction chip is exported is 0 degree-360 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332846 CN202709991U (en) | 2012-07-10 | 2012-07-10 | Detection device for absolute-type multi-circle rotation angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332846 CN202709991U (en) | 2012-07-10 | 2012-07-10 | Detection device for absolute-type multi-circle rotation angle |
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| Publication Number | Publication Date |
|---|---|
| CN202709991U true CN202709991U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332846 Withdrawn - After Issue CN202709991U (en) | 2012-07-10 | 2012-07-10 | Detection device for absolute-type multi-circle rotation angle |
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| Country | Link |
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| CN (1) | CN202709991U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749026A (en) * | 2012-07-10 | 2012-10-24 | 万向钱潮（上海）汽车系统有限公司 | Detection device and method for absolute-type multi-circle rotation angle |
| CN105378436A (en) * | 2013-07-08 | 2016-03-02 | 爱默生过程管理阀门自动化公司 | Absolute position detectors |
| CN107607036A (en) * | 2016-07-12 | 2018-01-19 | 吕方达 | Swing mechanism |
| CN110635659A (en) * | 2019-10-29 | 2019-12-31 | 杭州北马科技有限公司 | Take integrative step motor of drive of many rings of feedback |
| CN111880365A (en) * | 2015-12-29 | 2020-11-03 | 精工爱普生株式会社 | Illumination device and projector |
-
2012
- 2012-07-10 CN CN 201220332846 patent/CN202709991U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749026A (en) * | 2012-07-10 | 2012-10-24 | 万向钱潮（上海）汽车系统有限公司 | Detection device and method for absolute-type multi-circle rotation angle |
| CN102749026B (en) * | 2012-07-10 | 2015-01-21 | 万向钱潮（上海）汽车系统有限公司 | Detection device and method for absolute-type multi-circle rotation angle |
| CN105378436A (en) * | 2013-07-08 | 2016-03-02 | 爱默生过程管理阀门自动化公司 | Absolute position detectors |
| CN105378436B (en) * | 2013-07-08 | 2017-12-15 | 爱默生过程管理阀门自动化公司 | Absolute position transducer |
| CN111880365A (en) * | 2015-12-29 | 2020-11-03 | 精工爱普生株式会社 | Illumination device and projector |
| CN107607036A (en) * | 2016-07-12 | 2018-01-19 | 吕方达 | Swing mechanism |
| CN110635659A (en) * | 2019-10-29 | 2019-12-31 | 杭州北马科技有限公司 | Take integrative step motor of drive of many rings of feedback |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20150121 |
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| RGAV | Abandon patent right to avoid regrant |