CN201828366U - Non-contact torque measurement device - Google Patents
Non-contact torque measurement device Download PDFInfo
- Publication number
- CN201828366U CN201828366U CN2010205172552U CN201020517255U CN201828366U CN 201828366 U CN201828366 U CN 201828366U CN 2010205172552 U CN2010205172552 U CN 2010205172552U CN 201020517255 U CN201020517255 U CN 201020517255U CN 201828366 U CN201828366 U CN 201828366U
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- circle
- magnetic
- measuring apparatus
- magnet ring
- detection
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Abstract
The utility model discloses a non-contact torque measurement device, comprising a shell, a Hall element, an input shaft and an output shaft which can be rotatably connected into the shell,, wherein a torsion bar is connected between the input shaft and the output shaft. As the improvement of the utility model, the non-contact torque measurement device also comprises a magnetic ring and a detection ring, wherein the magnetic ring is arranged at one end of the torsion bar, and the detection ring is arranged at the other end of the magnetic ring and is matched with the magnetic ring; and the Hall element for checking the magnetic flux of the detection ring is arranged at an appropriate position outside the detection ring, and staggered N and S magnetic poles surround in a circle to form the magnetic ring. The non-contact torque measurement device can be applied to an electric power steering system to detect the torque of a steering wheel, not only has a simple structure and is convenient to install, but also has a low cost, higher accuracy and a very good application prospect.
Description
Technical field
The utility model relates to a kind of torque-measuring apparatus, especially a kind of independent noncontact torque-measuring apparatus.
Background technology
The steering-wheel torque sensor is the critical component in the electric boosting steering system, electric boosting steering system is controlled the electric current of assist motor with the output power-assisted according to the size of the size of steering-wheel torque sensor output signal and vehicle speed signal, so the quality of steering-wheel torque sensor quality directly influences the performance of electric boosting steering system.Advantages such as contactless steering-wheel torque sensor is because to have a volume little, and precision height, life-span are long have become the first-selection of electric power steering.Non-contact torque sensor can be divided into condenser type, electromagnetic type, inductance type, photo-electric or the like again.
Summary of the invention
The utility model provides a kind of highly sensitive at the defective that exists in the above technical background, is not subject to the noncontact torque-measuring apparatus that disturbs.
The technical scheme that the utility model solves existing issue is: a kind of noncontact torque-measuring apparatus, comprise housing, Hall element, be rotationally connected with input shaft, output shaft in the housing, be connected with torsion bar between described input shaft and the output shaft, as improvement of the present utility model, also comprise the magnet ring that is arranged at torsion bar one end and be arranged at the detection circle that the torsion bar other end cooperates with magnet ring, check that the Hall element that detects circle magnetic flux is arranged at the outer appropriate location of detection circle; Described magnet ring is that interlaced N, S magnetic pole forms around circumference.
As further improvement of the utility model, in comprising, described detection circle detects circle and the outer circle that detects, in being arranged at, outer detection circle detects outside the circle; Detect circle in described and comprise two interior magnetic guiding loops that are fixed thereon, described two interior magnetic guiding loops are symmetrical or roughly be symmetrically distributed on the magnet ring, the outer detection on the circle is fixed with an outer magnetic guiding loop, and Hall element is arranged at the appropriate location of outer magnetic guiding loop, checks the outer magnetic flux that detects circle; In axial direction be provided with induction tooth in opposite directions on the relative anchor ring of described two interior magnetic guiding loops.
As further improvement of the utility model, described magnet ring is fixed on the input shaft, and interior detection circle is connected on the output shaft.The magnetic flux change that outer detection circle detects interior detection circle passes to Hall element, and the variation of magnetic flux is converted to electric signal output, and Hall element output electric signal is given electric booster steering controller; When the magnetic flux change between two magnetic guiding loops, Hall element output and the proportional change in electric amount of flux change amount.The output signal of Hall element and torsion bar deflection are proportional, and the torsion bar deflection is proportional with the moment of torsion that acts on input shaft, the output shaft, measures the purpose that acts on the moment of torsion on input shaft, the output shaft thereby reach.
As further improvement of the utility model, the described interior circle that detects is fixed two interior magnetic guiding loops by injection moulding, and outer the detection enclosed by the fixing outer magnetic guiding loop of injection moulding.
As further improvement of the utility model, the described interior circle that detects is connected on the output shaft by interference fit.
As further improvement of the utility model, N, S magnetic pole interlaced on the described magnet ring are provided with ten pairs, and described magnet ring is a permanent magnetic ring.
As further improvement of the utility model, the induction tooth on described two interior magnetic conduction anchor rings is provided with ten pairs.The detection tooth center line that detects circle in two should be positioned at the intersecting lens of adjacent N/S magnetic pole, and the N of each detection tooth induction is equal substantially with the area of S, and the magnetic field of sensing on the magnetic guiding loop is near neutral.
As further improvement of the utility model, described input shaft and output shaft by bearing be connected with housing in.
The utility model compared with prior art, its beneficial effect is to be applied to electric boosting steering system, detects steering-wheel torque, and is not only simple in structure, easy for installation, and cost is lower, precision is higher, has good application prospects.
Description of drawings
Said structure of the present invention can be described further by drawings and Examples.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the magnet ring structural drawing in Fig. 1 structure.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the interior detection coil structures figure in Fig. 1 structure.
Fig. 5 is the left view of Fig. 4.
Fig. 6 is the magnetic guiding loop structural drawing in Fig. 4-5 structure.
Fig. 7 is the vertical view of Fig. 6.
Fig. 8 is the outer detection coil structures figure in Fig. 1 structure.
Fig. 9 is that cut-open view is looked on Fig. 8 left side.
Figure 10 is the upward view of Fig. 8.
Figure 11 is input, output, the torsion bar structural representation in Fig. 1 structure.
Figure 12 is the graph of a relation of the utility model torque sensor output signal size and torsion bar distortion.
Among the above-mentioned figure, 1 is magnet ring; 2 is interior detection circle; 3 is the outer circle that detects; 4 is input shaft; 5 is output shaft; 6 is torsion bar; 7 is housing; 8 is rolling bearing; 9,10 represent the N utmost point on the magnet ring, the S utmost point respectively; 11,12 be respectively the interior right side, the left magnetic guiding loop that detects the company's interior magnetic guiding loop on the circle; 13 is the induction tooth on the interior magnetic guiding loop; 14 is the outer outer magnetic guiding loop that detects on the circle 3; 15 is Hall chip on the Hall element.
Embodiment
Shown in Fig. 1-12, the implementation case comprises housing 7, programmable hall element, is rotationally connected with input shaft 4, output shaft 5 in the housing 7 by rolling bearing 8, be fixed with torsion bar 6 by pin between input shaft 4 and the output shaft 5, torsion bar 6 one ends are provided with magnet ring 1, the other end is provided with the detection circle that cooperates with magnet ring 1, checks that the Hall element that detects circle magnetic flux is arranged at the outer appropriate location of detection circle; Magnet ring 1 forms around circumference for interlaced N, S magnetic pole, and N, S magnetic pole interlaced on the magnet ring 1 are provided with ten pairs, and magnet ring 1 is a permanent magnetic ring.
In the implementation case, magnet ring 1 is fixed on the input shaft 4, detects circle and comprises interior circle 2 and the outer detection circle 3 of detecting, and the outer circle 3 that detects is arranged at interior the detection outside the circle 2; In detect circle 2 and be connected on the output shaft 5 by interference fit, the interior circle 2 that detects comprises two interior magnetic guiding loops that are fixed thereon by injection moulding, be left magnetic guiding loop 12 and right magnetic guiding loop 11, left and right magnetic guiding loop symmetry or roughly be symmetrically distributed on the magnet ring 1, the outer circle 3 of detecting is fixed with an outer magnetic guiding loop 14 by injection moulding, Hall element is arranged at the appropriate location of outer magnetic guiding loop 14, checks the outer magnetic flux that detects circle 3; In axial direction be provided with 130 pairs in induction tooth in opposite directions on the relative anchor ring of left and right magnetic guiding loop.
As shown in figure 12, be illustrated as the relation curve of Hall chip output signal and torsion bar distortion, horizontal ordinate is represented the torsion bar deflection, and ordinate is represented the Hall chip output signal, the Redundancy Design of two-way output representative sensor.
When not having action torque between input shaft 4 and the output shaft 5, shown in Fig. 6-7, induction tooth 13 is corresponding to the intersecting lens of N magnetic pole on the magnet ring 19 with S magnetic pole 10, induction tooth 13 induction N magnetic poles 9 are almost equal with the area of S magnetic pole 10, magnetic field intensity after N, the S magnetic field of induction offset on induction tooth 13 and right magnetic guiding loop 11, the left magnetic guiding loop 12 is almost nil, so the magnetic field intensity of sensing on the magnetic guiding loop 14 is almost equal, the magnetic flux on the Hall element on the Hall chip 15
0Minimum as initial value.
Between input shaft 4 and the output shaft 5 behind the action torque, N magnetic pole 9 is offset with the intersecting lens of S magnetic pole 10 on induction tooth 13 on right magnetic guiding loop 11, the left magnetic guiding loop 12 and the magnet ring 1, the area change of the induction tooth 13 relative induction magnetic field N utmost point S utmost points increases the magnetic field intensity of sensing the S utmost point, the N utmost point on right magnetic guiding loop 11, the left magnetic guiding loop 12 respectively, polarity is opposite, and it is φ ' that the Hall chip 15 of Hall element detects magnetic flux by the outer magnetic guiding loop 14 on the outer detection circle 3
0, the flux change magnitude relation Δ φ between right magnetic guiding loop 11, the left magnetic guiding loop 12=(φ '
0-φ
0) and magnet ring 1 proportional with the phase change of interior detection circle 2, above-mentioned variation passes to chip 15 through outer magnetic guiding loop 14, and detects the variation of magnetic flux by Hall chip, Hall element is exported with electrical signal form, above-mentioned change in torque amount is as shown in figure 12.
So far, change in torque between input shaft 4 and the output shaft 5 causes the phase change of magnet ring 1 and interior detection circle 2, pass to Hall chip 15, the change in torque amount is detected, and with electrical signal form ratio and moment of torsion output, the torsion bar deflection is proportional with the moment of torsion that acts on input shaft 4, the output shaft 5, measures the purpose that acts on the moment of torsion on input shaft 4, the output shaft 5 thereby reach.
Claims (9)
1. noncontact torque-measuring apparatus, comprise housing, Hall element, be rotationally connected with input shaft, output shaft in the housing, be connected with torsion bar between described input shaft and the output shaft, it is characterized in that: also comprise the magnet ring that is arranged at torsion bar one end and be arranged at the detection circle that the torsion bar other end cooperates with magnet ring, check that the Hall element that detects circle magnetic flux is arranged at the outer appropriate location of detection circle; Described magnet ring is that interlaced N, S magnetic pole forms around circumference.
2. noncontact torque-measuring apparatus as claimed in claim 1 is characterized in that: detect circle and the outer circle that detects in described detection circle comprises, detect outside the circle in outer detection circle is arranged at; Detect circle in described and comprise two interior magnetic guiding loops that are fixed thereon, described two interior magnetic guiding loops are symmetrical or roughly be symmetrically distributed on the magnet ring, the outer detection on the circle is fixed with an outer magnetic guiding loop, and Hall element is arranged at the appropriate location of outer magnetic guiding loop, checks the outer magnetic flux that detects circle; In axial direction be provided with induction tooth in opposite directions on the relative anchor ring of described two interior magnetic guiding loops.
3. noncontact torque-measuring apparatus as claimed in claim 1 or 2 is characterized in that: described magnet ring is fixed on the input shaft, and interior detection circle is connected on the output shaft.
4. noncontact torque-measuring apparatus as claimed in claim 3 is characterized in that: detect circle in described and fix two interior magnetic guiding loops by injection moulding, the outer circle that detects is by the fixing outer magnetic guiding loop of injection moulding.
5. noncontact torque-measuring apparatus as claimed in claim 4 is characterized in that: detect circle in described and be connected on the output shaft by interference fit.
6. noncontact torque-measuring apparatus as claimed in claim 2 is characterized in that: N, S magnetic pole interlaced on the described magnet ring are provided with ten pairs, and described magnet ring is a permanent magnetic ring.
7. noncontact torque-measuring apparatus as claimed in claim 5 is characterized in that: the induction tooth on described two interior magnetic conduction anchor rings is provided with ten pairs.
8. noncontact torque-measuring apparatus as claimed in claim 5 is characterized in that: described input shaft and output shaft by bearing be connected with housing in.
9. noncontact torque-measuring apparatus as claimed in claim 1 or 2 is characterized in that: described Hall element is the programmable hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205172552U CN201828366U (en) | 2010-08-31 | 2010-08-31 | Non-contact torque measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205172552U CN201828366U (en) | 2010-08-31 | 2010-08-31 | Non-contact torque measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828366U true CN201828366U (en) | 2011-05-11 |
Family
ID=43966893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205172552U Expired - Fee Related CN201828366U (en) | 2010-08-31 | 2010-08-31 | Non-contact torque measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201828366U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506698A (en) * | 2011-11-04 | 2012-06-20 | 合肥工业大学 | Contactless corner-torque sensor |
| CN103323158A (en) * | 2013-06-21 | 2013-09-25 | 嘉兴学院 | Brushless type torque sensor based on Hall effect |
| CN103968984A (en) * | 2014-05-13 | 2014-08-06 | 嘉兴学院 | Self-compensating brushless differential type torque sensor |
| CN104122020A (en) * | 2014-08-06 | 2014-10-29 | 嘉兴学院 | Field programmable gate array (FPGA) based induction phase shift type torque measurement system |
| CN105403340A (en) * | 2014-09-15 | 2016-03-16 | 联创汽车电子有限公司 | Non-contact torque sensor |
-
2010
- 2010-08-31 CN CN2010205172552U patent/CN201828366U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506698A (en) * | 2011-11-04 | 2012-06-20 | 合肥工业大学 | Contactless corner-torque sensor |
| CN103323158A (en) * | 2013-06-21 | 2013-09-25 | 嘉兴学院 | Brushless type torque sensor based on Hall effect |
| CN103968984A (en) * | 2014-05-13 | 2014-08-06 | 嘉兴学院 | Self-compensating brushless differential type torque sensor |
| CN104122020A (en) * | 2014-08-06 | 2014-10-29 | 嘉兴学院 | Field programmable gate array (FPGA) based induction phase shift type torque measurement system |
| CN104122020B (en) * | 2014-08-06 | 2018-05-08 | 嘉兴学院 | Sensing phase shift torch measuring system based on FPGA |
| CN105403340A (en) * | 2014-09-15 | 2016-03-16 | 联创汽车电子有限公司 | Non-contact torque sensor |
| CN105403340B (en) * | 2014-09-15 | 2018-04-17 | 联创汽车电子有限公司 | Non-contact torque sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20150831 |
|
| EXPY | Termination of patent right or utility model |