EP2601494A1 - Sensoranordnung mit magnetischem index-encoder in einer lagerdichtung - Google Patents
Sensoranordnung mit magnetischem index-encoder in einer lagerdichtungInfo
- Publication number
- EP2601494A1 EP2601494A1 EP11749760.2A EP11749760A EP2601494A1 EP 2601494 A1 EP2601494 A1 EP 2601494A1 EP 11749760 A EP11749760 A EP 11749760A EP 2601494 A1 EP2601494 A1 EP 2601494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- index
- shaft
- sensor
- arrangement according
- sensor arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000005415 magnetization Effects 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 239000006249 magnetic particle Substances 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
- F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
- F16J15/326—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals with means for detecting or measuring relative rotation of the two elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
Definitions
- the invention relates to a sensor arrangement according to Oberbe ⁇ handle of claim 1 and the use of the sensor assembly in motor vehicles.
- a rotary torque sensor ⁇ states is usually used.
- To determine the steering angle it is possible to determine the steering position by means of an intelligent commutation sensor of the steering assist motor and a simple index sensor.
- the invention has the task of proposing a Sensoranord ⁇ voltage which realizes a rotational angle index unit relatively inexpensive and space saving.
- the preferred integration of the magnetic index encoder in the seal of the bearing is characterized by a relatively high robustness. It is preferred that the magnetic field sensor element is assigned to the In ⁇ dex encoder so that the Magnetfeldsensorele ⁇ ment detects or can detect whether the rotation angle of the shaft is in a defined rotational angle or rotational angle range and that the sensor arrangement is adapted to that it can detect and / or identify the angular position of the shaft with respect to a defined rotation angle and / or defined rotation angle range.
- the index encoder preferably comprises magnetic particles which are arranged or embedded in an elastomer, where ⁇ in this elastomer is in particular annular and is arranged as a seal of the bearing.
- the magnetic field sensor element is designed as a switching sensor element, in particular as a switching Hall element or switching magnetoresistive magnetic field sensor element.
- the index encoder preferably has at least one or more magnetizations as index mark (s).
- the magnetization of the at least one index mark in particular a magnetization direction that is substantially axially aligned with respect to the shaft, said Mag ⁇ netleiter is particularly preferably formed in a substantially homogeneous within the index mark.
- the index encoder exactly to an index mark or more index marks with such magnetization.
- the index encoder has one main index mark and two or a number corresponding to a plurality of times of two smaller minor index marks, wherein the minor index marks on the right and left side with respect to the main index mark in particular symmetrically formed and arranged.
- the main index mark on a different magnetic polarity and / or Magne thnesraum, as the two at least directly right and left side adjacent sub-index marks.
- index encoder is a single
- Main index mark and a single smaller minor index mark wherein the major index mark relative to the ring of the seal comprises more than half of the circumference, in particular more than 80% of the circumference, wherein the main index mark has a different magnetic polarity and or Magne thnesraum than the secondary index mark has.
- one or each index mark designates a defi ned rotational angle or rotational angle range of the magnetic encoder index or the first shaft or he makes ⁇ tangible.
- the magnetic field sensor element of the rotational angle index unit is mounted, which measures a magnetic field of the permanent magnetic particles in the sealing surface of the upstream rolling bearing, as the magnetic encoding of the seal as magnetic In dex encoder, is generated.
- the torque sensor and the rotation angle indexing unit are preferably integrated in a common assembly.
- the sensor elements and / or electronic Bauelemen ⁇ te of the torque sensor and the rotation angle index unit are arranged in particular on a common board and / or on a common chip.
- the index encoder is directly or indi ⁇ rectly connected to the first shaft and rotates with this and that the corresponding magnetic field sensor element of the rotation angle index unit is fixed and non-contact to the first shaft.
- the torque sensor comprises a first and a second shaft portion of the first shaft, both of which are interconnected by means of a torsion bar and are rotatable and arranged against each other, wherein on the first shaft portion, a magnetic torque-encoder is arranged and on the second Shaft section two of this torque encoder associated stator with each protruding fingers are arranged.
- stator elements each comprise a soft-magnetic ring element with respect to axial projecting of the first shaft, particularly preferably in materiality ⁇ union trapezoidal shaped, having fingers, the fingers of the two stator engage without contact into each other and wherein the stator jointly assigned at least one torque-magnetic field sensor element is, with ⁇ means which directly or indirectly, the relative angle of rotation between the first and the second shaft portion is detected, from which is closed to the torque acting on the first shaft.
- ⁇ which directly or indirectly, the relative angle of rotation between the first and the second shaft portion is detected, from which is closed to the torque acting on the first shaft.
- the two shaft portions are each formed in the form of attached to the first shaft or on the torsion bar sleeves.
- the torque sensor does not comprise a torsion bar or is configured such that the torque is detected on a substantially rigid shaft, the torque sensor having at least one of the following torque sensor elements,
- this at least one torque sensor element is directly or indirectly connected to the first shaft and / or is designed and arranged such that it can detect a torque acting on the first shaft.
- the detection of the magnetic Index encoder by the Mag ⁇ netfeldsensorelement the rotation angle index unit or by the index sensor element preferably allows the hard ⁇ whether the each at a defined time-fitting, relative angle of rotation between the first shaft and a fixed reference point or the index sensor element is within a defined index range or a defined overlap region.
- the sensor arrangement preferably comprises a common housing.
- the invention also relates to the use of the sensor arrangement in motor vehicles, in particular as a torque sensor arrangement with rotation angle index detection, particularly preferably in the steering of a motor vehicle.
- the invention also relates to a steering system with one of the claimed or proposed above sensor arrangements or sensor arrangement variants, wherein the first shaft with a drive unit, insbesonde ⁇ re an electric motor or a hydraulic servo unit, is directly or indirectly mechanically coupled, so that the drive unit a rotational movement of the first shaft whatsoeverru ⁇ FEN, wherein the sensor arrangement comprises an angle sensor, which detects the rotation angle of the drive shaft of the drive ⁇ unit, as the second shaft, wherein the angle sensor and the drive unit are in particular designed so that the angle sensor the Absolute angle of rotation of the second shaft within one revolution.
- Figs. 1 to 5 show schematic exemplary sensor ⁇ arrangements.
- Fig. 1 is an input-side steering shaft (steering wheel side)
- Magnetic field sensor element 5 is a permanently magnetic material having seal 7, as an index encoder assigned, which is designed as a seal 7 of a rolling bearing 6, which first shaft 1, 2 la ⁇ siege.
- the magnetized seal 7, as an index encoder, comprising index mark 8 is shown.
- the magneti ⁇ catalyzed area or index mark 8 produces a magnetic field in the axial direction, which is illustrated in the diagram on the right.
- the switching point SP of the magnetic field sensor element of the rotational angle index unit is significantly larger than an externally expected or parasitic magnetic field, which could lead to ei ⁇ ner malfunction.
- the course of the flux density Bz measured via the angular position shows that the angular position of the switching point SP is amplitude-dependent. This amplitude dependence is expressed in a changed switching point as a function of the distance between the magnetic surface ⁇ and sensor element.
- the magnetization can also be formed over the entire area of the magnetized sealing element, as is the case with the index encoder embodiment shown in FIG.
- the magnetic field sensor element is thus permanently penetrated by a defined magnetic field whose direction changes in the switching point SP. In this design can be used on much smaller magnetic fields, since the switching point does not have to deviate so much from the zero magnetic field.
- the index encoder has there ⁇ a main index mark 10, which comprises more than 80% of the circumference of the encoder and a secondary index mark 9 on.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010038907 | 2010-08-04 | ||
DE102011078281A DE102011078281A1 (de) | 2010-08-04 | 2011-06-29 | Sensoranordnung mit magnetischem Index-Encoder in einer Lagerdichtung |
PCT/EP2011/062653 WO2012016861A1 (de) | 2010-08-04 | 2011-07-22 | Sensoranordnung mit magnetischem index-encoder in einer lagerdichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2601494A1 true EP2601494A1 (de) | 2013-06-12 |
Family
ID=44534328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11749760.2A Withdrawn EP2601494A1 (de) | 2010-08-04 | 2011-07-22 | Sensoranordnung mit magnetischem index-encoder in einer lagerdichtung |
Country Status (4)
Country | Link |
---|---|
US (1) | US9140617B2 (de) |
EP (1) | EP2601494A1 (de) |
DE (1) | DE102011078281A1 (de) |
WO (1) | WO2012016861A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011114138B4 (de) * | 2010-10-29 | 2015-09-24 | Sew-Eurodrive Gmbh & Co Kg | Dichtanordnung |
CN103925933B (zh) * | 2013-01-11 | 2016-12-28 | 江苏多维科技有限公司 | 一种多圈绝对磁编码器 |
DE102013006379A1 (de) * | 2013-04-13 | 2014-10-16 | Valeo Schalter Und Sensoren Gmbh | Sensorvorrichtung mit einer Drehmomentsensoreinrichtung und einer Inkrementalsensoreinrichtung und Kraftfahrzeug |
KR102107697B1 (ko) * | 2013-09-24 | 2020-05-07 | 엘지이노텍 주식회사 | 콜렉터 조립체 및 이를 포함하는 토크 센서 |
JP6268442B2 (ja) * | 2015-06-02 | 2018-01-31 | 日立オートモティブシステムズ株式会社 | トルクセンサおよび電動パワーステアリング装置 |
DE102020121895A1 (de) | 2020-08-20 | 2022-02-24 | Bourns, Inc. | Sensor zum Erfassen einer Position |
US11703403B2 (en) * | 2020-09-16 | 2023-07-18 | Nsk Ltd. | Torque measurement device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5431413A (en) * | 1993-01-19 | 1995-07-11 | The Torrington Company | Seal incorporating an encoder |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2661246B1 (fr) | 1990-04-20 | 1994-08-05 | Roulements Soc Nouvelle | Dispositif de mesure d'un couple sur un arbre. |
JP2004271180A (ja) | 2003-01-16 | 2004-09-30 | Nsk Ltd | トルク測定装置付転がり軸受ユニット及びトルク測定装置付車輪駆動用ユニット |
DE10301610A1 (de) | 2003-01-17 | 2004-08-12 | Ellsäßer, Dietrich Gerhard | Sensorlager |
FR2875005B1 (fr) * | 2004-09-06 | 2006-12-08 | Hutchinson Sa | Codeur de deplacement, dispositif comprenant un tel codeur et procede de fabrication d'un tel codeur |
FR2884918B1 (fr) | 2005-04-22 | 2007-08-10 | Skf Ab | Dispositif et procede de mesure de couple de torsion. |
DE102005038516A1 (de) * | 2005-07-29 | 2007-02-08 | Valeo Schalter Und Sensoren Gmbh | Vorrichtung zur Detektion von Umdrehungen einer Lenkwelle |
FR2898188B1 (fr) * | 2006-03-06 | 2008-07-04 | Hutchinson Sa | Codeur pour arbre, dispositif comprenant un tel codeur et procede de fabrication d'un tel codeur |
JP4780314B2 (ja) * | 2006-03-31 | 2011-09-28 | Nok株式会社 | ロータリエンコーダ用パルサーリング |
FR2908512B1 (fr) | 2006-11-15 | 2009-02-27 | Skf Ab | Dispositif de detection de couple transmis par un arbre. |
DE102007057050A1 (de) * | 2007-01-29 | 2008-07-31 | Continental Teves Ag & Co. Ohg | Drehmomentsensor mit verminderter Störanfälligkeit |
JP5450948B2 (ja) * | 2007-02-23 | 2014-03-26 | Ntn株式会社 | 回転検出装置付き車輪用軸受 |
DE102007056539A1 (de) | 2007-11-23 | 2009-05-28 | Schaeffler Kg | Vorrichtung zum Erfassen der Verkippung einer Welle |
JP5153373B2 (ja) | 2008-02-06 | 2013-02-27 | Ntn株式会社 | センサ付車輪用軸受 |
WO2010007068A1 (de) * | 2008-07-14 | 2010-01-21 | Continental Teves Ag & Co. Ohg | Drehmomentsensoranordnung mit drehwinkel-index-erfassung |
-
2011
- 2011-06-29 DE DE102011078281A patent/DE102011078281A1/de not_active Withdrawn
- 2011-07-22 WO PCT/EP2011/062653 patent/WO2012016861A1/de active Application Filing
- 2011-07-22 EP EP11749760.2A patent/EP2601494A1/de not_active Withdrawn
- 2011-07-22 US US13/811,949 patent/US9140617B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5431413A (en) * | 1993-01-19 | 1995-07-11 | The Torrington Company | Seal incorporating an encoder |
Also Published As
Publication number | Publication date |
---|---|
DE102011078281A1 (de) | 2012-02-09 |
US20130118273A1 (en) | 2013-05-16 |
WO2012016861A1 (de) | 2012-02-09 |
US9140617B2 (en) | 2015-09-22 |
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