WO2010031554A2 - Module magnétique comportant un anneau magnétique, pour dispositif de détection de couple et/ou d'angle de rotation, et procédé de fabrication - Google Patents

Module magnétique comportant un anneau magnétique, pour dispositif de détection de couple et/ou d'angle de rotation, et procédé de fabrication Download PDF

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Publication number
WO2010031554A2
WO2010031554A2 PCT/EP2009/006719 EP2009006719W WO2010031554A2 WO 2010031554 A2 WO2010031554 A2 WO 2010031554A2 EP 2009006719 W EP2009006719 W EP 2009006719W WO 2010031554 A2 WO2010031554 A2 WO 2010031554A2
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic ring
intermediate piece
magnet assembly
assembly according
carrier sleeve
Prior art date
Application number
PCT/EP2009/006719
Other languages
German (de)
English (en)
Other versions
WO2010031554A3 (fr
Inventor
Dirk Rachui
Jens Thom
Ekkehart Froehlich
Original Assignee
Valeo Schalter Und Sensoren Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Schalter Und Sensoren Gmbh filed Critical Valeo Schalter Und Sensoren Gmbh
Publication of WO2010031554A2 publication Critical patent/WO2010031554A2/fr
Publication of WO2010031554A3 publication Critical patent/WO2010031554A3/fr

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Classifications

    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders

Definitions

  • the invention relates to a magnet assembly with a magnetic ring for a torque and / or rotation angle sensor arrangement on a shaft, in particular for the detection of rotational angle or torque-dependent variables on the shaft or between partial waves according to the preamble of the main claim and the method claims.
  • Torsionssystems for example, as part of a steering shaft, a determination of the force exerted on the entire steering shaft torque can be performed, as required in particular for use in steering systems of motor vehicles with electric power steering.
  • Such a torque sensor usually consists of two units, namely a dynamic unit, which rotates with the steering shaft or the torsion system and a stationary static unit with electronics, which is fixed to the surrounding gear housing.
  • the static sensor unit is connected via a bearing with the dynamic unit, wherein between the transmission housing and the static sensor unit is preferably an electrical connector.
  • the magnetic ring Within the magnet assembly of the torque sensor described above is the magnetic ring, it being known that with such magnetic rings, which are in a functional relationship with magnetic sensor means via a changing with an absolute or relative rotation magnetic field, the rotational movements of the shaft detected without contact can be. Furthermore, it is known per se that such a magnetic ring is produced by an injection molding process.
  • the magnetic flux generated in the gap depends on the rotational angle position of the magnet and the detector of the sensor arrangement, wherein between the partial waves of the shaft, a torsion element is arranged, so that from this the torque acting on the shaft can be measured.
  • the sensor principle described above is also known from WO 02/071019 A.
  • the magnetic ring is positively connected to a carrier sleeve. Between the magnetic ring and the carrier sleeve there is an intermediate element, which absorbs mechanical stresses that may be caused by changing heat loads, and prevents the resulting damage to the magnetic ring.
  • the magnetic ring is connected to the relatively short carrier sleeve which lies axially behind or in front of the magnetic ring.
  • the connection of the carrier sleeve and the shaft is designed as a clearance fit.
  • the thus possibly between the carrier sleeve and the shaft possibly located air gap leads to a runout and tilting of the sleeve on the shaft, as shown in Figure 1 of the drawing. Since the carrier sleeve is thus located next to the magnetic ring, the tilting leads through the axial extension of the magnetic ring to an additional increase in the concentricity. The space required by the magnet assembly as a whole is thereby disadvantageously increased.
  • Another known possibility is a connection between the magnetic ring and the carrier sleeve, in which the magnetic ring is connected to the carrier sleeve with an adhesive. Since the carrier sleeve is located under the magnetic ring, a tilting of the carrier sleeve on the shaft does not contribute to increasing the concentricity and thereby of the installation space (FIG. 2).
  • a disadvantage of these adhesive joints is the large decrease in their strength under changing or elevated temperature loads and associated release of the adhesive from one of the joining partners.
  • the invention relates to a magnet assembly with a magnetic ring which is mounted by means of a support sleeve on a shaft, in particular for a torque and / or rotation angle sensor arrangement, for example on the steering shaft of a motor vehicle.
  • the magnetic ring lying radially over the support sleeve is advantageously positively and / or materially connected via at least one intermediate piece with the support sleeve, wherein each toothing and / or undercut geometries are arranged on the magnet ring such that these geometries by attaching the at least one intermediate piece to be cast as injection molded part.
  • the magnetic ring and / or the at least one intermediate piece can thereby engage around a peripheral collar or a bead on the carrier sleeve at least partially in a form-fitting manner.
  • the holes are conical in the interior or they are angled axially relative to the axis of the shaft.
  • the magnetic ring with its front side rests directly on the collar or the magnetic ring is located with its front side over parts of the spacers or spaced from the federal government. Furthermore, it is possible that a folded collar or a bead is arranged in the axial course of the carrier sleeve.
  • Magnetic assembly proposed, with, for making the positive and / or cohesive connection between the magnetic ring and the intermediate piece, the magnetic ring is placed on the federal government, the magnetic ring and the carrier sleeve are placed as inserts in a plastic injection mold and then the plastic to form the Intermediate piece is injected or poured.
  • two intermediate pieces are present, wherein in each case an intermediate piece is assigned to the magnetic ring and an intermediate piece of the carrier sleeve.
  • a method for the production is proposed, in which for the production of the positive and / or cohesive connection between the magnetic ring and the two spacers for the case in which the magnetic ring contains the intermediate piece, this and the support sleeve placed as inserts in a plastic injection mold and the connection is made by the injected or cast plastic of the intermediate piece and in the event that the carrier sleeve contains the intermediate piece, these and the magnetic ring are placed as inserts in a plastic injection mold and the connection is made by the injected or molded plastic of the intermediate piece.
  • the order of manufacture of the magnet assembly according to the invention exerts a great influence on the wall thickness of the magnetic ring.
  • the inner diameter of the magnetic ring is to be sized larger, resulting in a reduced wall thickness.
  • FIG. 1 shows a basic application example of a magnetic ring for a sensor arrangement on a shaft with a magnetic ring lying axially next to a carrier sleeve
  • FIG. 2 shows a basic application example of a magnetic ring for a sensor arrangement on a shaft with a magnetic ring lying radially above a carrier sleeve
  • Figures 10 and 11 embodiments of an inventive arrangement of the magnetic ring on the support sleeve with a connection via two intermediate pieces as a casting.
  • Figure 1 shows a basic application example of a magnetic ring 1, which is located axially adjacent to a support sleeve 2, as part of a magnet assembly for a sensor assembly described in the introduction to a sensor shaft 3, for example, for rotation angle or torque measurement.
  • the connection between the magnetic ring 1 and the intermediate piece 4 and between the intermediate piece 4 and the support sleeve 2 should be formed positively or as a combined force-fit. Such a positive locking prevents relative movements between the magnetic ring 1 and the carrier sleeve 2 in the axial and circumferential direction.
  • the carrier sleeve 2 is provided with at least one, outwardly facing collar 5, wherein the collar 5 as a contact surface for the sealing of the Tool in a Sphtzrea for the magnetic ring 1 and also serves as a contact surface for the magnetic ring 1.
  • FIG. 1 a hitherto conventional arrangement can be seen, in which the magnetic ring 1 is connected to the carrier sleeve 2, which lies axially next to the magnetic ring 1.
  • the connection between the carrier sleeve 2 and the shaft 3 is usually designed as a clearance, so that the air gap possibly located between the carrier sleeve 2 and the shaft 3 leads to a runout and to a tilting of the carrier sleeve 2 on the shaft 3.
  • the tilting and the resulting axial broadening, indicated here by the measure 6, leads, as already mentioned in the introduction to the introduction, to an enlargement of the concentricity and of the space which the magnet assembly as a whole requires.
  • carrier sleeve shaft can thereby the minimum axial extent (dimension 6) of the magnet assembly to the strength of the magnetic ring 1 and the strength of the support sleeve 2 can be reduced.
  • Exemplary embodiments of the embodiment of the embodiment of an intermediate piece 10 are shown with reference to the following Figures, in which in each case a positive connection between the magnetic ring 1, the carrier sleeve 2 and a Intermediate piece 10 is produced by casting with injected plastic.
  • the order of manufacture of the magnet assembly can vary; First embodiments are explained in which the magnetic ring 1 is placed on a collar 7, the magnetic ring 1 and the support sleeve 2 are placed as inserts in a plastic injection mold and then the injected plastic forms the intermediate piece 10.
  • conical blind holes 11 are present on the end face of the ring magnet 11, which in turn are at an angle in the magnetic ring 1 and encapsulated with the plastic of the intermediate piece 10 so that it protrudes positively with a pin 12 in the magnetic ring 1 ,
  • FIG. 4 shows an exemplary embodiment in which an at least partially encircling undercut geometry 13 is present on the surface of the magnetic ring 1 over the outside diameter, which is encapsulated with the plastic of the intermediate piece 10 so that it forms a positive fit with an at least partially encircling geometry 14 in the Magnetic ring 1 protrudes.
  • FIG. 6 shows an exemplary embodiment in which an at least partially encircling undercut geometry 17 is provided on the end face of the magnetic ring 1 over the diameter, which is encapsulated with the plastic of the intermediate piece 10 so that it forms a positive fit with an at least partially encircling geometry 18 in the Magnetic ring 1 protrudes.
  • an at least partially circumferential undercut geometry 19 on the magnetic ring 1 is provided on the surface above the inner diameter, which is provided by a folded collar 20 is guided and positively with the inclusion of the folded collar 20 is shed with the spacer 10.
  • the carrier sleeve 2 is encapsulated on the collar 7 with the plastic of the intermediate piece 10 and the resulting assembly is used as an insert for the injection molding of the magnet ring.
  • FIG 8 such an embodiment is shown, in which the magnetic ring 1 is connected via its end face by means of an undercut geometry 21 to the plastic of the intermediate piece 10 such that the magnet 1 is axially spaced from the support sleeve and thus with its end face over the entire surface of the intermediate piece 10 is present.
  • FIG. 9 shows an exemplary embodiment in which the magnetic ring 1 is partially connected to the intermediate piece 10 via its end face by means of an undercut geometry on the inner diameter, so that the magnetic ring rests partly on the plastic of the intermediate piece 10 and partly on the carrier sleeve 2.
  • Figure 10 shows an embodiment in which the magnetic ring 1 is connected via a magnet-side intermediate piece 23 and a sleeve-side intermediate piece 24 to the support sleeve 2 form fit by means of appropriate geometries.
  • the carrier sleeve 2 As the last embodiment, it is shown in FIG. 11 that the carrier sleeve 2, as well as in FIG. 7, is provided centrally with a circumferential folded collar 20 or a bead.
  • the folded collar 20 is over-molded with the plastic of the sleeve-side intermediate piece 24.
  • the magnetic ring 1 also has an additional plastic ring as an intermediate piece 23, so that via the spacers 23 and 24 of the magnetic ring 1 and carrier sleeve 2 are positively connected to each other.
  • the connection between the intermediate pieces 23 and 24 can be made cohesively, for example by laser welding, gluing, etc., by means of a form-locking latching hook or by a combined force-fit.
  • the magnet ring 1 contains the intermediate piece 23, it and the support sleeve 2 can be placed as inserts in an injection mold and the connection can also be made by the injected plastic of the intermediate piece 24. If the carrier sleeve 2 contains the intermediate piece 24, it and the magnetic ring 1 can be placed as inserts in an injection mold and the connection can then be made by the injected plastic of the intermediate piece 23.

Abstract

L'invention concerne un module magnétique comportant un anneau magnétique (1) monté sur un axe au moyen d'une douille support (2), notamment pour un dispositif de détection de couple et/ou d'angle de rotation. L'anneau magnétique (1) repose radialement sur la douille support à laquelle il est relié par complémentarité de forme et/ou par liaison de matière par l'intermédiaire d'au moins un élément intermédiaire (10; 23, 24), des géométries dentées ou en contre-dépouille étant façonnées sur l'anneau magnétique (1) par moulage par injection, le ou les éléments intermédiaires (10; 23, 24) étant placés pour le moulage.
PCT/EP2009/006719 2008-09-17 2009-09-17 Module magnétique comportant un anneau magnétique, pour dispositif de détection de couple et/ou d'angle de rotation, et procédé de fabrication WO2010031554A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008047466A DE102008047466A1 (de) 2008-09-17 2008-09-17 Magnetbaugruppe für eine Drehmoment- und/oder Drehwinkelsensoranordnung mit einem Magnetring und Herstellungsverfahren
DE102008047466.5 2008-09-17

Publications (2)

Publication Number Publication Date
WO2010031554A2 true WO2010031554A2 (fr) 2010-03-25
WO2010031554A3 WO2010031554A3 (fr) 2010-10-14

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PCT/EP2009/006719 WO2010031554A2 (fr) 2008-09-17 2009-09-17 Module magnétique comportant un anneau magnétique, pour dispositif de détection de couple et/ou d'angle de rotation, et procédé de fabrication

Country Status (2)

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DE (1) DE102008047466A1 (fr)
WO (1) WO2010031554A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096179A1 (fr) * 2014-12-19 2016-06-23 Thyssenkrupp Presta Ag Ensemble émetteur pour un capteur de couple et/ou d'angle
EP2594915A3 (fr) * 2011-11-15 2017-06-28 Valeo Schalter und Sensoren GmbH Procédé de liaison d'une pièce de capteur avec une pièce d'arbre d'un véhicule automobile et agencement comportant une pièce d'arbre et une pièce de capteur
US9801387B2 (en) 2012-05-30 2017-10-31 Bayer Cropscience Ag Compositions comprising a biological control agent and an insecticide
DE102017110259B3 (de) 2017-05-11 2018-07-19 Thyssenkrupp Ag Sensor mit einer Magnetbaugruppe und Verfahren zu dessen Herstellung
EP3047240B1 (fr) 2013-09-18 2018-10-03 Valeo Schalter und Sensoren GmbH Procédé de fabrication d'une unité d'aimant destiné à un dispositif de détection servant à détecter une grandeur de mesure caractérisant l'état de rotation d'un arbre de direction d'un véhicule automobile, unité d'aimant, dispositif de détection et véhicule automobile
CN108718137A (zh) * 2018-05-29 2018-10-30 浙江德宏汽车电子电器股份有限公司 一种电机转动轴轴端位置传感器组件
CN109074933A (zh) * 2016-01-15 2018-12-21 博马泰克管理股份公司 磁体系统和用于这样的磁体系统的磁性塑料部件

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Publication number Priority date Publication date Assignee Title
DE102011085290A1 (de) 2010-10-29 2012-05-03 Continental Teves Ag & Co. Ohg Magnetischer Encoder für eine Differenzwinkelsensoranordnung
DE102011101482B4 (de) 2011-05-13 2017-05-11 Thyssenkrupp Presta Aktiengesellschaft Sensoranordnung für eine drehbare Welle
DE102015109735A1 (de) * 2015-06-18 2016-12-22 Hella Kgaa Hueck & Co. Sensor zur Drehwinkelbestimmung einer Welle
DE102015122176A1 (de) * 2015-12-18 2017-06-22 Valeo Schalter Und Sensoren Gmbh Magneteinheit für eine Sensoreinrichtung eines Kraftfahrzeugs, Sensoreinrichtung mit einer Magneteinheit und Kraftfahrzeug mit einer Sensoreinrichtung
DE102016110774A1 (de) * 2016-06-13 2017-12-14 Valeo Schalter Und Sensoren Gmbh Magneteinheit für eine Sensoreinrichtung eines Kraftfahrzeugs, Sensoreinrichtung mit einer Magneteinheit und Kraftfahrzeug mit einer Sensoreinrichtung
EP3695426A1 (fr) 2017-10-10 2020-08-19 Bomatec Management AG Arrangement d'aimant et son procédé de fabrication
JP7463940B2 (ja) 2020-10-22 2024-04-09 日本精工株式会社 トルクセンサ及びマグネットアッセンブリの製造方法
JP7367654B2 (ja) * 2020-10-22 2023-10-24 日本精工株式会社 トルクセンサ

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EP1813925A1 (fr) * 2006-01-31 2007-08-01 JTEKT Corporation Détecteur de couple

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EP0213732A1 (fr) * 1985-07-26 1987-03-11 Honda Giken Kogyo Kabushiki Kaisha Anneau magnétique de détection de rotation d'un objet
DE69411657T2 (de) * 1993-10-06 1999-03-25 Skf France Kodierelement mit Messaufnehmer und damit angestattetem Lager
DE20002277U1 (de) * 2000-02-09 2000-04-06 Baermann Max Gmbh Hochgefülltes Kunststoffteil
EP1813925A1 (fr) * 2006-01-31 2007-08-01 JTEKT Corporation Détecteur de couple

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2594915A3 (fr) * 2011-11-15 2017-06-28 Valeo Schalter und Sensoren GmbH Procédé de liaison d'une pièce de capteur avec une pièce d'arbre d'un véhicule automobile et agencement comportant une pièce d'arbre et une pièce de capteur
US9801387B2 (en) 2012-05-30 2017-10-31 Bayer Cropscience Ag Compositions comprising a biological control agent and an insecticide
EP3047240B1 (fr) 2013-09-18 2018-10-03 Valeo Schalter und Sensoren GmbH Procédé de fabrication d'une unité d'aimant destiné à un dispositif de détection servant à détecter une grandeur de mesure caractérisant l'état de rotation d'un arbre de direction d'un véhicule automobile, unité d'aimant, dispositif de détection et véhicule automobile
WO2016096179A1 (fr) * 2014-12-19 2016-06-23 Thyssenkrupp Presta Ag Ensemble émetteur pour un capteur de couple et/ou d'angle
CN107250731A (zh) * 2014-12-19 2017-10-13 蒂森克虏伯普利斯坦股份公司 用于扭矩传感器和/或角度传感器的换能器组件
CN109074933A (zh) * 2016-01-15 2018-12-21 博马泰克管理股份公司 磁体系统和用于这样的磁体系统的磁性塑料部件
DE102017110259B3 (de) 2017-05-11 2018-07-19 Thyssenkrupp Ag Sensor mit einer Magnetbaugruppe und Verfahren zu dessen Herstellung
WO2018206680A1 (fr) 2017-05-11 2018-11-15 Thyssenkrupp Presta Ag Capteur doté d'un ensemble magnétique
CN108718137A (zh) * 2018-05-29 2018-10-30 浙江德宏汽车电子电器股份有限公司 一种电机转动轴轴端位置传感器组件

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WO2010031554A3 (fr) 2010-10-14
DE102008047466A1 (de) 2010-04-15

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