CN104483052B - Magnetic structure of magnetic sensitive torque sensor - Google Patents
Magnetic structure of magnetic sensitive torque sensor Download PDFInfo
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- CN104483052B CN104483052B CN201410824363.7A CN201410824363A CN104483052B CN 104483052 B CN104483052 B CN 104483052B CN 201410824363 A CN201410824363 A CN 201410824363A CN 104483052 B CN104483052 B CN 104483052B
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Abstract
The invention relates to a magnetic structure of a magnetic sensitive torque sensor. The magnetic structure comprises a magnetic flux acquisition structure (30), a magnetic rotor structure (10) and a magnetic flux convergence rotor structure (20), and is characterized in that the magnetic flux acquisition structure comprises two column type bunchers (31 and 32) arranged on two sides of a measurement interval (40), each column type buncher comprises an acquisition surface (33), at least one bunching surface (34) and at least one focusing surface (35); the magnetic rotor structure comprises a multi-pole magnet ring (11) and a bracket (13); and the magnetic flux convergence rotor structure (20) comprises magnetic flux convergence rings (21 and 22), and the multi-pole magnet ring (11) and the bracket (13) are arranged between the magnetic flux convergence ring (21) and the magnetic flux convergence ring (22).
Description
Technical field
The present invention relates to the Sampling techniques of position sensor, and in particular to a kind of magnetic circuit knot of Mageneto-sensitive type torque sensor
Structure, is suitable for the angle displacement measurement of Shaft Torque, is especially suitable for the torque sensor of electric boosting steering system.
Background technology
Electric boosting steering system has significant energy-conserving and environment-protective advantage, and torque sensor is used as electric boosting steering system
Critical component, be the study hotspot of sensor.At present, realize that moment of torsion is passed using the method for relative angular displacement more than torque sensor
Sense, main Types have：The types such as Mageneto-sensitive type, potentiometer type, inductance type, condenser type, magnetostriction type, photo-electric, Mageneto-sensitive type tool
There are the good many advantages of relatively simple for structure, cost performance, application prospect is good.
Mageneto-sensitive type torque sensor generally has 2 rotor structures that can be rotated against, and has been respectively mounted permanent magnet and has led
Magnet, arranges magneto sensor in sensor magnetic circuit, detects the flux change produced due to angular displacement between rotary shaft, magnetic circuit knot
The quality of structure has decisive influence to Mageneto-sensitive type torque sensor quality；Through retrieval, related patent is as follows：
United States Patent (USP) US6810336 B2 illustrates three kinds of structures of Mageneto-sensitive type torque sensor：Its first embodiment is adopted
With the multi-pole magnet-ring of axial charging, the gap that its magneto sensor and magnetic are converged between ring is very big, causes magnetic circuit reluctance very big；It
Two embodiments are also, using the multi-pole magnet-ring of axial charging, to increased beyond the magnetic flux of the first embodiment converges ring external diameter
Clustering ring, clustering ring converges interannular with magnetic flux needs the change at random of larger gap, vibration environment intermediate gap to cause magnetic circuit magnetic
Logical random fluctuation, and need to increase sensor space；Its 3rd embodiment is utilized using the multi-pole magnet-ring of radial magnetizing
Magnetic flux converges the tooth top end face trapped flux of ring, because magnetic flux converges the finite thickness of ring, so, magnetic flux collection efficiency compares
It is low.
United States Patent (USP) US6912923 B2 illustrates a kind of electromagnetic flux field concentrator structure of Mageneto-sensitive type torque sensor, its magnetic flux
Concentrator includes two pairs of Baltimore grooves, and two magnetic converge the centre that ring is separately positioned on Baltimore groove, and when its object is to vibration, magnetic converges
The gap change of polycyclic both sides is complementary, suppresses impact of the gap change to magnetic flux.This design, magnetic flux converges the gap of ring both sides
It is parallel way, during poised state, the gap magnetic resistance R that magnetic flux converges ring both sides is equal, parallel connection gaps magnetic resistance is R/2, vibration is sent out
When raw, magnetic flux converges the gap of ring both sides, and a side clearance magnetic resistance ＞ R, another side clearance magnetic resistance ＜ R cause parallel connection gaps
Magnetic resistance is necessarily smaller than R/2 during poised state, and gap magnetic resistance can must simultaneously change with vibration change, magnetomotive force.
Chinese patent CN100468024 C illustrate that using the torque sensor of radial magnetizing multi-pole magnet-ring its magnetic flux converges
There is polycyclic the magnetic flux of bending to converge tooth, and the magnetic flux of two magnetic flux convergence rings converges tooth to be needed to be interspersed, and adjacent magnetic flux converges
There is magnet short-cut path effect between poly- tooth, toothed area is little if magnetic flux is converged, and magnetic flux collection efficiency is low；If magnetic flux converges the flank of tooth
Product is big, then magnet short-cut path affects notable.The contradiction of this magnetic structure, magnetic flux collection efficiency and magnet short-cut path effect is difficult to take into account, and
And processing and forming is more complicated, take up room also than larger.There are various technical problems in above-mentioned three kinds of structures, especially
Be magnetic flux collection efficiency than relatively low, for the technical problem, those skilled in the art is also constantly attempting, but effect is equal
It is undesirable.
The content of the invention
In order to solve above-mentioned problem, the invention discloses a kind of magnetic structure of Mageneto-sensitive type torque sensor, should
Equipment global design is ingenious, compact conformation, small volume, has properly settled the low technical problem of magnetic flux collecting efficiency.
To achieve these goals, technical scheme is as follows：A kind of magnetic structure of Mageneto-sensitive type torque sensor,
The magnetic structure includes that magnetic flux gathers structure, and magnetic rotor structure and magnetic flux converge rotor structure, it is characterised in that described
Magnetic flux collection structure includes two column bunchers for being symmetricly set on measurement gap both sides, and the column buncher includes
One collection face, at least one boundling face and at least one focusing surface, the magnetic rotor structure includes multi-pole magnet-ring and props up
Frame, the magnetic flux converges rotor structure includes that magnetic flux converges ring, and the multi-pole magnet-ring and support are arranged on magnetic flux and converge ring and magnetic
Between direct bank remittance service polycyclic.In the technical scheme, magnetic flux collection structure adopts column buncher, without the deformation that bending extends.With
The chip buncher that prior art is adopted compares, and the column buncher of the present invention, magnetic flux path is short, along the magnetic flux of magnetic flux path
Diverging is few, and magnet short-cut path affects little；Construction is succinct, small volume, prolonging beyond the space that the ring width for converging ring without magnetic flux is limited
Stretch, magnetic flux collecting efficiency is improved.
Used as a modification of the present invention, the column buncher is arranged on what the ring width for converging ring by magnetic flux was limited
In annular space, without extension and deformation beyond annular space, during radial vibration, collection face will not run off magnetic flux and converge ring
Ring width, can keep the stability of collection face magnetic flux.
Used as a modification of the present invention, the collection face of the column buncher gathers magnetic flux and converges by coupling gap
The magnetic flux that the radial direction internal tooth of ring is converged, the collection face is completely covered by the ring width that magnetic flux converges ring.Column buncher
Collection face is completely covered by the ring width that magnetic flux converges ring, and during radial vibration, collection face will not run off the ring width that magnetic flux converges ring, can
To keep the stability of collection face magnetic flux.
As a modification of the present invention, there is a boundling face between the collection face of the column buncher and focusing surface
Or multiple boundling faces, strengthen the magnetic flux density that collection face is collected for constriction.
Used as a modification of the present invention, the measurement gap is inserted into magneto sensor, and the magneto sensor has sensitizing range
Domain, the area of the focusing surface of the column buncher is more than the area of the sensitizing range of magneto sensor, it is ensured that focusing surface will be quick
Sensillary area domain is completely covered.
As a modification of the present invention, the collection face ＞ boundlings face of the column buncher or multiple boundling face ＞
Focusing surface.The collection face of column buncher, boundling face and focusing surface, the structure design reduced step by step using area so that adopt
The magnetic flux density that collection face is collected, after multistage constriction strengthens, focuses on the sensitizing range of magneto sensor, improves magnetic flux collection
Efficiency.The chip buncher that prior art is adopted, its major function is magnetic flux, and the flux interaction of buncher is in magneto sensor
All surfaces, do not have for magneto sensor sensitizing range boundling focus characteristics.In order to the magnetic circuit for improving measurement gap it is close
Degree, the chip buncher of prior art, more using wide-angle or the magnetic flux collection surface of closed-loop.But, excessive collection surface meeting
Increase processing flatness tolerance simultaneously and parallelism tolerance is installed, need to increase coupling gap to accommodate mechanical tolerance, and increase
Coupling gap can cause magnetic circuit reluctance to increase, and reduce magnetic flux collecting efficiency.
As a modification of the present invention, the measurement gap between the focusing surface of described two column bunchers is more than etc.
In magneto sensor height.
Used as a modification of the present invention, when measurement gap needs to lay has welded the PCB of magneto sensor, PCB sets
Installation through-hole is put, allows the focusing surface of magnetic flux buncher to pass through PCB, reach magneto sensor encapsulating face.Prior art does not have magnetic flux collection
The PCB installation through-holes design of beam device, measurement gap=magneto sensor height+PCB thickness, the close magneto sensor of usual PCB thickness
Highly, so, measurement gap ≈ 2* magneto sensors height.Gap is bigger, and magnetic resistance is bigger, and magnetic flux diverging is also bigger, by magnetosensitive
The magnetic flux density of element sensitizing range is lower, thus, magnetic flux collecting efficiency is lower, and the technical scheme is reduced between measurement
Gap, magnetic resistance diminishes, and magnetic flux is distributed and diminished, and then substantially increases magnetic flux collecting efficiency.
As a modification of the present invention, fitting portion is provided with the multi-pole magnet-ring of the magnetic rotor structure, on support
Fitting portion is provided with, the Baltimore groove and convex that wherein fitting portion and fitting portion are set to mutually be fitted together to is stupefied, the fitting portion number >=
1.Multi-pole magnet-ring has the fitting portion of corresponding matching with magnet rotor support, and with fitting portion the magnetic pole reference bit of multi-pole magnet-ring is fixed
Put, the concordance of sensor production efficiency of assembling and product can be improved.
Used as a modification of the present invention, the coupling gap that the collection face of column buncher and magnetic flux are converged between ring is
Single cascaded structure, during axial vibration, two coupling gaps synchronously change with axial vibration, but, change in the opposite direction, greatly
It is little equal, it is two coupling gaps and constant, the stability of collection face magnetic flux can be kept.
As a modification of the present invention, the boundling face be set to cylinder or cone in one kind, it is described to adopt
Collection face is set to the one kind in sector, circle, ellipse, irregular figure.
Relative to prior art, advantages of the present invention is as follows：1）Overall construction design is ingenious, compact conformation, small volume；
2) the technical scheme magnetic flux collection structure adopts column buncher, without the deformation that bending extends, with prior art employing
Chip buncher compares, and the column buncher of the present invention, magnetic flux path is short, and the magnetic flux diverging along magnetic flux path is few, magnet short-cut path
Affect little；Construction is succinct, small volume, the extension beyond the space that the ring width for converging ring without magnetic flux is limited, magnetic flux collection effect
Rate is improved；3）In the technical scheme, the collection face of column buncher is completely covered by the ring width that magnetic flux converges ring, radial vibration
When, collection face will not run off the ring width that magnetic flux converges ring, can keep the stability of collection face magnetic flux；4）The technical scheme is neutral
The collection face of pillar buncher, boundling face and focusing surface, the structure design reduced step by step using area so that collect in collection face
Magnetic flux density, after multistage constriction strengthens, focuses on the sensitizing range of magneto sensor, improves magnetic flux collecting efficiency；5）It is many
Pole magnet ring has the fitting portion of corresponding matching with magnet rotor support, and with fitting portion the magnetic pole reference position of multi-pole magnet-ring is fixed,
The concordance of sensor production efficiency of assembling and product can be improved；6）In the technical scheme, the collection face of column buncher
It is single cascaded structure to converge the coupling gap between ring with magnetic flux, and during axial vibration, two coupling gaps are with axial vibration
Synchronous change, but, change in the opposite direction, equal in magnitude, it is two coupling gaps and constant, collection face magnetic flux can be kept
Stability.
Description of the drawings
Fig. 1 is magnetic flux collection structural representation；
Fig. 2-Fig. 5 is column buncher structural representation；
Fig. 6, Fig. 7 are provided with the column buncher structural representation of magneto sensor；；
Fig. 8, Fig. 9 are column buncher structural representations；
Figure 10～Figure 13 is another kind of example structure schematic diagram of column buncher；
Figure 14 is magnetic rotor structure schematic diagram；
Figure 15 is that magnetic converges rotor structure schematic diagram；
Figure 16 is the magnetic structure schematic diagram of Mageneto-sensitive type torque sensor；
In figure：
10th, magnetic rotor structure, 11, multi-pole magnet-ring, H, multi-pole magnet-ring height, 12, magnet ring fitting portion, 13, magnet rotor
Support, 14, support fitting portion, 20, magnetic flux converge rotor structure, 21,22, magnetic flux converge ring, 23, radial direction internal tooth, W, magnetic flux converge
Polycyclic ring width, θ, radial direction internal tooth segment angle, 30, magnetic flux collection structure, 31,32, column buncher, 33, collection face, 34, collection
Beam face, 35, focusing surface, 40, measurement gap, 41, coupling gap, 50, magneto sensor, 51, sensitizing range, h, magneto sensor are high
Degree, d, sensitizing range centre-to-centre spacing, 52, PCB, 53, PCB through hole.
Specific embodiment
In order to deepen being appreciated and understood by for the present invention, with reference to the accompanying drawings and detailed description, this is further elucidated
It is bright.
Embodiment 1：
Referring to Fig. 1, Figure 16, a kind of magnetic structure of Mageneto-sensitive type torque sensor, the magnetic structure is gathered including magnetic flux
Structure 30, magnetic rotor structure 10 and magnetic flux converge rotor structure 20, and the magnetic flux collection structure is symmetrical arranged including two
In the column buncher 31,32 of the both sides of measurement gap 40, the column buncher includes a collection face 33, at least one
The focusing surface 35 of boundling face 34 and at least one, the magnetic rotor structure 10 includes multi-pole magnet-ring 11 and support 13, the magnetic
The poly- rotor structure 20 of direct bank remittance service includes that magnetic flux converges ring 21,22, and the multi-pole magnet-ring 11 and support 13 are arranged on magnetic flux and converge ring 21
And magnetic flux is converged between ring 22.In Fig. 1, magnetic flux collection structure 30 includes two column bunchers 31,32, column buncher
Collection face 33 by coupling gap 41 gather magnetic flux converge the magnetic flux of ring 21,22, magnetic flux converge ring 22 on broken circle represent vertical
The projection in the collection face 33 of pillar buncher 32, gathers face 33 and is completely covered by ring width W that magnetic flux converges ring 21,22.Two are stood
It is measurement gap 40 between the focusing surface 35 of pillar buncher.In the technical scheme, magnetic flux collection structure adopts column boundling
Device, without the deformation that bending extends.The chip buncher adopted with prior art compares, the column buncher of the present invention, magnetic
Path is short, and the magnetic flux diverging along magnetic flux path is few, and magnet short-cut path affects little；Construction is succinct, small volume, and without magnetic flux ring is converged
Extension beyond the space that ring width is limited, magnetic flux collecting efficiency is improved.
Embodiment 2：
Referring to Fig. 1, Figure 15, Figure 16, as a modification of the present invention, the column buncher 31,32 be arranged on by
Magnetic flux is converged in the annular space that ring width W of ring 21,22 is limited, and without extension and deformation beyond annular space, is radially shaken
When dynamic, collection face will not run off the ring width that magnetic flux converges ring, can keep the stability of collection face magnetic flux；The column boundling
The collection face 33 of device gathers magnetic flux and converges the magnetic flux that the radial direction internal tooth 23 of ring 21,22 is converged, two magnetic by coupling gap 41
The axial orientation of radial direction internal tooth 23 of direct bank remittance service polycyclic overlaps, and referring to Figure 15, the number of teeth of radial direction internal tooth 23 takes 4, equidistantly distributed, radially
Internal tooth 23 collects it and converges ring 21,22 to magnetic flux towards the magnetic flux of magnetic pole；The ring of ring 21,22 is converged by magnetic flux in the collection face 33
Wide W is completely covered.The collection face of column buncher is completely covered by the ring width that magnetic flux converges ring, during radial vibration, gathers face
The ring width that magnetic flux converges ring will not be run off, the stability of collection face magnetic flux can be kept.Remaining structure and advantage are complete with embodiment 1
It is exactly the same.
Embodiment 3：
Referring to Fig. 2-Fig. 5, as a modification of the present invention, referring to Fig. 2, the collection face 33 of the column buncher
There is a boundling face 34 and focusing surface 35 between, or, multiple boundling face 34a, 34b, 34c, referring to Fig. 3；For constriction enhancing
The magnetic flux density that collection face 33 is collected.Fig. 2～Fig. 5 is various forms of column bunchers, and wherein column buncher is all only
There is a circular focusing surface 35, Fig. 2, the collection face 33 of Fig. 3, Fig. 4 is circular, and the column buncher of Fig. 2 has a boundling face
The column buncher that 34, Fig. 3 column buncher has two boundling face 34a, 34b, Fig. 4 has three boundling faces 34a, 34b,
34c, it is that, in order to further improve the effectiveness of magnetic flux boundling, boundling face can be using cylinder or circular cone to arrange multiple boundling faces
Body shapes, and Fig. 5 is the deformation of Fig. 4 column bunchers, and its collection face 33 is more than and circle using sector, the area in fan-shaped collection face
Shape gathers the area in face, can gather more magnetic fluxs.Remaining structure and advantage are identical with embodiment 1.
Embodiment 4：
Referring to Fig. 6, Fig. 7, used as a modification of the present invention, the measurement gap is inserted into magneto sensor 50, the magnetic
Quick element has sensitizing range 51, and the area of the focusing surface 35 of the column buncher is more than the sensitizing range 51 of magneto sensor
Area, it is ensured that focusing surface 35 is completely covered sensitizing range 51；Survey between the focusing surface 35 of described two column bunchers
Amount gap 40 is more than or equal to magneto sensor height h.Referring to Fig. 6, the only one of which sensitizing range 51 of magneto sensor 50, using SIP
Encapsulation, its pin arrangement can be placed on the PCB52 for having welded the pin of magneto sensor 50 between measurement in a side of encapsulation
Beyond gap 40, only magneto sensor 50 is inserted in measurement gap 40.The sensitizing range 51 of Fig. 6 magneto sensors 50 be rectangle, rectangle
Outer broken circle is the projection of column buncher focusing surface 35, and the rectangle with diameter greater than sensitizing range 51 of focusing surface 35 is diagonal
Line, to ensure being completely covered to sensitizing range 51 of focusing surface 35.Fig. 7 shows answering for column buncher structure described in Fig. 4
With the measurement gap 40 between two focusing surfaces of column buncher 31,32 is assembled with magneto sensor 50, and measurement gap 40 is approximately equal to
Magneto sensor height h.Remaining structure and advantage are identical with embodiment 1.
Embodiment 5：
Referring to Fig. 2-5, Fig. 8, Fig. 9, as a modification of the present invention, the ＞ of collection face 33 of the column buncher
Boundling face 34 or multiple boundling face 34a, 34b, 34c ＞ focusing surface 35.The collection face of column buncher, boundling face and focusing
Face, the structure design reduced step by step using area so that the magnetic flux density that collection face is collected, after multistage constriction strengthens, are gathered
Jiao improves magnetic flux collecting efficiency in the sensitizing range of magneto sensor.The boundling face is set in cylinder or cone
One kind, the collection face 33 is set to the one kind in sector, circle, ellipse, irregular figure, the number of the focusing surface 35
Measure for one or more, Fig. 8 is the deformation of Fig. 5 column bunchers, and focusing surface 35 increases to two by one, two focusing
The centre-to-centre spacing in face sets according to centre-to-centre spacing d of the sensitizing range 51 of magneto sensor 50.Fig. 9 is the deformation of Fig. 8 column bunchers, will
2 focusing surfaces 35 of Fig. 8 merge into 1 big focusing surface, and the merging focusing surface of this figure is circle, but is not limited to circle,
Can be the shapes such as ellipse.The present embodiment is applied to the sensing element 50 with 2 sensitizing ranges 51, the column collection of Fig. 8
Beam device is particularly suited for the larger magneto sensor of centre-to-centre spacing d, and the column buncher of Fig. 9 is then applied to the less magnetic of centre-to-centre spacing d
Quick element.The shape in the collection face of the present embodiment is not limited only to sector using sector.Remaining structure and advantage and embodiment
1 is identical.
Embodiment 6：
Referring to Figure 10-13, the application of another embodiment of column buncher, the magnetic inserted in the measurement gap 40
Quick element 50 has two sensitizing ranges 51, is encapsulated using SOT, and its pin is symmetrically distributed in two sides of the encapsulation, welds
It is connected on the PCB 52 immediately below magneto sensor 50.Used as a modification of the present invention, PCB 52 arranges installation through-hole 53, allows magnetic
The focusing surface 35 of logical buncher 31,32 passes through PCB 52, reaches the encapsulating face of magneto sensor 50.Prior art does not have magnetic flux buncher
The design of PCB installation through-holes, measurement gap=magneto sensor height+PCB thickness, the close magneto sensor of usual PCB thickness is high
Degree, so, measurement gap ≈ 2* magneto sensors height, about the 2 of embodiment 4 times.Gap is bigger, and magnetic resistance is bigger, magnetic flux diverging
Also bigger, the magnetic flux density by magneto sensor sensitizing range is lower, thus, magnetic flux collecting efficiency is lower.The present invention exists
PCB 52 arranges installation through-hole 53, the sensitive region of the correspondence magneto sensor of installation through-hole 53 so that column buncher can be with
PCB thickness is passed through, impact of the PCB thickness to measurement gap is overcome completely, and then substantially increase magnetic flux collecting efficiency.Figure 10
Two sensitizing ranges and Fig. 8 columns buncher and the PCB through hole corresponding relation of magneto sensor 50 are shown, Figure 11 is Figure 10
Assembling schematic diagram, Figure 12 shows the corresponding of 2 sensitizing ranges of magneto sensor 50 and Fig. 9 columns buncher and PCB through hole
Relation, Figure 13 is the assembling schematic diagram of Figure 12.Remaining structure and advantage are identical with embodiment 1.
Embodiment 8：
Referring to Figure 14, as a modification of the present invention, it is provided with the multi-pole magnet-ring 11 of the magnetic rotor structure embedding
Conjunction portion 12, is provided with fitting portion 14 on support 13, wherein fitting portion 12 and fitting portion 14 be set to mutually chimeric Baltimore groove and
Convex is stupefied, fitting portion number >=1.Multi-pole magnet-ring has the fitting portion of corresponding matching with magnet rotor support, solid with fitting portion
Determine the magnetic pole reference position of multi-pole magnet-ring, the concordance of sensor production efficiency of assembling and product can be improved.Remaining structure and
Advantage is identical with embodiment 1.
Embodiment 9：
Referring to Fig. 1, Figure 16, as a modification of the present invention, collection face and the magnetic flux of column buncher converge ring it
Between coupling gap be single cascaded structure, during axial vibration, two coupling gaps synchronously change with axial vibration, but,
Change in the opposite direction, it is equal in magnitude, it is two coupling gaps and constant, the stability of collection face magnetic flux can be kept.Figure 16 is
The magnetic structure schematic diagram of Mageneto-sensitive type torque sensor, it is shown that the overall picture of magnetic structure, there is 4 coupling gaps in magnetic flux path
41 and 1 measurement gaps 40, the coupling gap in magnetic circuit is all single cascaded structure, and measurement gap 40 is approximately equal to magneto sensor
Height h.Remaining structure and advantage are identical with embodiment 1.
The present invention can also be by least one of technical characteristic described in embodiment 2,3,4,5,6,7,8,9 and embodiment 1
Combination, forms new embodiment.
It should be noted that above-described embodiment is only presently preferred embodiments of the present invention, it is not for limiting the present invention's
Protection domain, the equivalent made on the basis of the above or replacement belong to protection scope of the present invention, the guarantor of the present invention
Shield scope is defined by claims.
Claims (9)
1. a kind of magnetic structure of Mageneto-sensitive type torque sensor, the magnetic structure includes that magnetic flux gathers structure（30）, magnetic turn
Minor structure（10）And magnetic flux converges rotor structure（20）, it is characterised in that the magnetic flux collection structure is arranged on including two
Measurement gap（40）The column buncher of both sides（31,32）, the column buncher include one collection face（33）, at least
One boundling face（34）And at least one focusing surface（35）, the magnetic rotor structure（10）Including multi-pole magnet-ring（11）With
Frame（13）, the magnetic flux convergence rotor structure（20）Ring is converged including magnetic flux（21、22）, the multi-pole magnet-ring（11）And support
（13）It is arranged on magnetic flux and converges ring（21）Ring is converged with magnetic flux（22）Between, the column buncher（31,32）Be arranged on by
Magnetic flux converges ring（21,22）Ring width（W）In the annular space for being limited.
2. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 1, it is characterised in that the column boundling
The collection face of device（33）Magnetic flux is gathered by coupling gap (41) and converges ring（21,22）Radial direction internal tooth（23）The magnetic for being converged
It is logical, the collection face（33）Ring is converged by magnetic flux（21,22）Ring width（W）It is completely covered.
3. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 2, it is characterised in that the column boundling
The collection face of device（33）And focusing surface（35）Between have a boundling face（34）Or multiple boundling faces（34a,34b,34c）, use
Strengthen collection face in constriction（33）The magnetic flux density of collection.
4. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 3, it is characterised in that in the measurement gap
Insertion magneto sensor（50）, the magneto sensor has sensitizing range（51）, the focusing surface of the column buncher（35）Face
Sensitizing range of the product more than magneto sensor（51）Area, it is ensured that focusing surface（35）By sensitizing range（51）It is completely covered.
5. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 4, it is characterised in that the column boundling
The collection face of device（33）＞ boundlings face（34）Or each boundling face（34a,34b,34c）＞ focusing surfaces（35）.
6. the magnetic structure of the Mageneto-sensitive type torque sensor according to claim 4 or 5, it is characterised in that described two vertical
The focusing surface of pillar buncher（35）Between measurement gap（40）More than or equal to magneto sensor height（h）.
7. the magnetic structure of the Mageneto-sensitive type torque sensor according to claim 4 or 5, it is characterised in that between the measurement
Gap（40）Magneto sensor has been welded in middle insertion（50）PCB when, PCB（52）Installation through-hole is set（53）, allow magnetic flux buncher
（31,32）Focusing surface（35）Through PCB（52）, reach magneto sensor（50）Encapsulating face.
8. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 7, it is characterised in that the magnet rotor knot
The multi-pole magnet-ring of structure（11）On be provided with fitting portion（12）, support（13）On be provided with fitting portion（14）, wherein fitting portion（12）
And fitting portion（14）The Baltimore groove and convex for being set to mutually be fitted together to is stupefied, fitting portion number >=1.
9. the magnetic structure of Mageneto-sensitive type torque sensor according to claim 8, it is characterised in that the column boundling
The coupling gap that the collection face of device and magnetic flux are converged between ring is single cascaded structure；The boundling face be set to cylinder or
One kind in person's cone, the collection face is set to the one kind in sector, circle, ellipse.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410824363.7A CN104483052B (en) | 2014-12-26 | 2014-12-26 | Magnetic structure of magnetic sensitive torque sensor |
| PCT/CN2015/079462 WO2016101520A1 (en) | 2014-12-26 | 2015-05-21 | Magnetic circuit structure of magnetic sensitive torque sensor |
| DE212015000272.1U DE212015000272U1 (en) | 2014-12-26 | 2015-05-21 | Magnetic circuit structure of a magnetically sensitive torque sensor |
| EP15871596.1A EP3239677B1 (en) | 2014-12-26 | 2015-05-21 | Magnetic circuit structure of magnetic sensitive torque sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410824363.7A CN104483052B (en) | 2014-12-26 | 2014-12-26 | Magnetic structure of magnetic sensitive torque sensor |
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| CN104483052A CN104483052A (en) | 2015-04-01 |
| CN104483052B true CN104483052B (en) | 2017-04-26 |
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| CN110657910A (en) * | 2019-06-26 | 2020-01-07 | 南京华敏电子有限公司 | Integrated sensor structure combining steering wheel torque and corner detection functions |
| CN112505597B (en) * | 2020-10-16 | 2021-10-22 | 横店集团东磁股份有限公司 | Magnetic flux detection tool for annular permanent magnet |
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| CN101980915A (en) * | 2008-06-26 | 2011-02-23 | 大星电机工业株式会社 | Contactless torque sensor for steering mechanism |
| CN103661595A (en) * | 2012-09-14 | 2014-03-26 | 日立汽车***转向器株式会社 | Torque sensor and power steering system using the torque sensor |
| CN204461657U (en) * | 2014-12-26 | 2015-07-08 | 南京华敏电子有限公司 | A kind of magnetic structure of Mageneto-sensitive type torque sensor |
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| JP2011013133A (en) * | 2009-07-03 | 2011-01-20 | Kyb Co Ltd | Torque sensor |
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| CN101980915A (en) * | 2008-06-26 | 2011-02-23 | 大星电机工业株式会社 | Contactless torque sensor for steering mechanism |
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