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WO2018108519A1 - Conducteur de flux pour un dispositif détecteur de couple, procédé de fabrication d'un conducteur de flux pour un dispositif détecteur de couple et dispositif détecteur de couple - Google Patents

Conducteur de flux pour un dispositif détecteur de couple, procédé de fabrication d'un conducteur de flux pour un dispositif détecteur de couple et dispositif détecteur de couple Download PDF

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Publication number
WO2018108519A1
WO2018108519A1 PCT/EP2017/080673 EP2017080673W WO2018108519A1 WO 2018108519 A1 WO2018108519 A1 WO 2018108519A1 EP 2017080673 W EP2017080673 W EP 2017080673W WO 2018108519 A1 WO2018108519 A1 WO 2018108519A1
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WO
WIPO (PCT)
Prior art keywords
flux
tab
flat
flux guide
flat band
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.)
Ceased
Application number
PCT/EP2017/080673
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German (de)
English (en)
Inventor
Roman Schoepe
Ekkehart Froehlich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
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 WO2018108519A1 publication Critical patent/WO2018108519A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • 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
    • 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
    • G01D2205/40—Position sensors comprising arrangements for concentrating or redirecting magnetic flux
    • 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 flux guide for a torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle, the flux guide having a circumferentially extending flux guide body around a first axis for collecting a magnetic flux of a stator of a torque sensor device, and a first protruding from the flux guide body tab and at least a second, circumferentially spaced from the first tab, second, projecting from the flux guide body tab, which are respectively provided for forwarding the collected magnetic flux to at least one magnetic field sensor of a torque sensor device.
  • the flux guide is made in one piece by forming from a flat band.
  • the invention further relates to a method for producing a flux guide for a torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle, wherein the flux conductor for collecting a magnetic flux of a stator of a torque sensor device comprises a circumferentially extending flux guide body which is annular or ring-shaped about a first axis and for propagating the collected magnetic flux to a magnetic field sensor of a torque sensor device, a first tab projecting from the flux conductor body and at least one second tab spaced circumferentially from the first tab, projecting from the flux conductor body, the flux conductor being integrally formed from a ribbon ,
  • the invention relates to a torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle with a flux guide.
  • Torque sensor devices are usually designed to detect a torque applied to a shaft, in particular in motor vehicles Torque sensor devices are provided to detect an applied by the driver on a steering shaft steering torque. Such torque sensor devices are used, for example, in electric steering systems to control the electric drive motor of the steering system based on the steering torque applied by a driver, for example, to provide a corresponding steering assistance.
  • torque sensor devices are used in conjunction with an axially split shaft and a torsion bar of defined, known torsional stiffness, the torsion bar connecting a first portion of the axially split shaft to a second portion of the axially split shaft. If a torque is applied to the shaft, this causes a rotation of the two parts of the shaft to each other by a measurable angle of rotation, wherein the angle of rotation adjusts depending on the applied torque and the stiffness of the torsion bar, so that from the detected angle of rotation at a defined, known stiffness of the Torsionsstabes the applied torque can be determined.
  • Magnetic sensor systems are very frequently used, in which a circumferential ring magnet, which is usually designed as a permanent magnet, is non-rotatably connected to the first part of the steering shaft and in which a stator holder, in which magnetically conductive stator elements are accommodated, is non-rotatably connected to the second part of the shaft, wherein the stator holder is usually arranged concentrically in the radial direction with a small air gap around the ring magnet.
  • the magnetic flux of the ring magnet is thereby usually via the stator attached to the stator, which usually consists of two separate parts, each with an annular disc-shaped, in the radial direction away from the shaft outwardly extending region or in the axial direction extending cylinder jacket-shaped region and consist of extending in the axial direction tabs, using at least one flux guide to a magnetic field sensor, such as a Hall sensor, passed to be subsequently evaluated.
  • Generic torque sensor devices with at least one flux guide are basically known from the prior art, for example from DE 103 46 332 A1, EP 1 584 908 A2 or EP 2 295 310 A2.
  • the flux guides used in the aforementioned publications DE 103 46 332 A, EP 1 584 908 A2 and EP 2 295 310 A2 each have a strip-shaped, ring-shaped or ring-segment-shaped region, which in the following, in particular in the sense of the invention, as Flux conductor body is called, and which can be arranged with a defined gap to the adjacent stator in the torque sensor device, in particular cylinder jacket shaped to engage around the stator in the circumferential direction.
  • the flux conductors each have one or more tabs, which extend generally transversely to the strip-shaped region in the radial direction to the outside and by means of which the collected magnetic flux can be passed to one or more magnetic field sensors.
  • JP 201 1232318 A proposes to produce the flux guide by forming a suitably cut flat ribbon.
  • a flux guide according to the invention is characterized in that the first tab and the second tab each have at least one first flat band section adjoining the flux conductor body and connected thereto, one each adjacent to the first flat band section and connected thereto, second flat band section and one to the second The flat ribbon portion adjoining and connected to this, third flat band portion, wherein the first flat band portion is folded relative to the Flußleiter Eisen Associates along a first bending edge, wherein the second flat band portion is folded over the first flat band portion along a second bending edge and wherein the third flat band portion relative to the second flat band portion along a bent third bending edge.
  • a flux guide according to the invention has two tabs spaced apart in the circumferential direction, wherein two tabs are circumferentially spaced from one another in the sense of the invention, if their associated flat band sections are not connected to each other, a particularly good quality of the forwarding of the magnetic flux to one Magnetic field sensor of a torque sensor can be achieved, thus enabling the provision of a torque sensor signal with a good signal quality.
  • a particularly good quality of the forwarding of the magnetic flux to one Magnetic field sensor of a torque sensor can be achieved, thus enabling the provision of a torque sensor signal with a good signal quality.
  • Due to the inventive design of the tabs in particular by the inventive production of the tabs by three folding of adjacent flat band sections by a respective defined bending edge, a stable, mechanically robust flux conductor can be provided especially in the tabs.
  • the flux conductor body of a flux guide according to the invention preferably serves for collecting a magnetic flux in the circumferential direction around a stator element of a torque sensor device, wherein the flux conductor body preferably extends in total over at least an angle of 180 ° in the circumferential direction.
  • the flux conductor body which is formed by the annular segment-shaped region of the flat strip, extends in the circumferential direction over a total area of more than 180 °.
  • the flux guide body does not have to extend in one piece over an angular range in the circumferential direction of more than 180 °.
  • the flux conductor body of a flux guide may also have a plurality of segments each extending over an angular range of less than 180 °, for example over an angular range of 70 ° in the circumferential direction, but in total over an angular range of more than 180 ° ers stretch, as in this example over an angular range of 210 °.
  • the tabs of a flux guide according to the invention preferably serve to forward the magnetic flux collected by means of the flux conductor body to at least one magnetic field sensor of a torque sensor device, preferably via each tab of a flux guide according to the invention a respective magnetic flux can be forwarded to a magnetic field sensor associated with the tab.
  • a flat band in the context of the invention is a flat component, in particular semi-finished, small thickness understood, the length of which is much larger than its width, preferably the width of the component is much larger than its thickness.
  • the flat strip is preferably a strip with a cuboid or rectangular cross-section.
  • the flat strip is preferably made of a metallic material or contains a metallic material.
  • the flat strip particularly preferably consists of magnetic material or contains magnetic material, for example ferromagnetic material.
  • the flat strip contains a soft magnetic material or consists thereof, in particular soft magnetic metal.
  • Soft magnetic materials are materials or materials that can be easily magnetized in a magnetic field, in particular ferromagnetic materials are known in this context.
  • the magnetization of these materials or the magnetic polarization can be generated for example by an electric current in a current-carrying coil or by the presence of a permanent magnet, as it is usually present in a torque sensor device.
  • the polarization of the magnetic material leads in all soft magnetic materials to a much higher magnetic flux density than the flux density generated externally by the acting magnetic field in the air.
  • the magnetic field generated by a permanent magnet of a torque sensor device or the magnetic flux detected by a stator assembly of a torque sensor device can be easily detected more intensively, whereby a better resolution in the detection of the magnetic field can be achieved, and thus a higher sensor resolution can be enabled.
  • the flat strip of a flux guide according to the invention in this case has a longitudinal central surface which extends substantially parallel to the two flat band sides and is preferably defined as that surface in which a neutral fiber of the flat strip runs.
  • At least one bending edge preferably all bending edges of the flux guide, runs parallel to the longitudinal center face of the flat strip and lies in particular within the longitudinal center face.
  • first the first flat strip section does not necessarily have to be bevelled with respect to the flux conductor body, then the second flat strip section opposite the first flux guide body and then the third flux conductor body opposite the second flat strip section, etc., but rather also the second flat strip section opposite the first Be bent third flat strip portion and then the first flat band portion relative to the second flat band portion and finally the flux conductor body with respect to the first flat band portion.
  • this applies only in the context of technically possible, i. executable, modifications.
  • the flat strip in particular a longitudinal center surface of the flat strip, extends in the area of the flux conductor body in the form of a cylinder jacket around the first axis. Due to the cylindrical jacket-shaped arrangement of the flat strip in the region of the flux conductor body, i. in that the flux guide body is arranged in the form of a cylinder jacket around the first axis, the flux guide body adjoins the stator assembly in a functionally installed state in a torque sensor device with a significantly larger area than in the case of a radial extent of the ribbon or the flux conductor body about the first axis around the case would be.
  • the magnetic flux can be collected more efficiently.
  • the first bending edge of at least one tab runs parallel to the first axis.
  • both first bending edges ie both the first bending edge of the first tab, and the first bending edge of the second tab run parallel to the first axis.
  • the second bending edge extends at least one tab in a plane parallel to the first axis, in particular at an angle of 45 ° to Ers th axis.
  • both second bending edges i. both the second bending edge of the first tab, and the second bending edge of the second tab each in a plane parallel to the first axis, in particular at an angle of 45 ° to the first axis.
  • the second bending edge of the first tab and the second bending edge of the second tab run parallel to one another.
  • At least the second flat-band section of at least one tab is folded over the first flat-band section of this tab along the second bending edge.
  • a flux guide according to the invention is preferably designed in such a way or the second flat strap section is preferably bent relative to the first flat strap section, preferably turned over, such that the longitudinal middle face of the flat strap likewise extends parallel to the first axis in the region of the second flat strap section of at least one tab.
  • folding is understood to mean folding by 180 °, i. the bending with a bending angle of 180 ° whereby hauling a fold to the associated bending edge is formed around.
  • the third bending edge of at least one tab runs perpendicular to the first axis.
  • both third bending edges ie, both the third bending edge of the first tab, and the third bending edge of the second tab, perpendicular to the first axis.
  • This can be achieved in a simple manner that in an advantageous manner a longitudinal center surface of the flat strip in the region of the third flat band section extends at least one tab normal to the first axis.
  • a particularly good forwarding of a collected magnetic flux to a magnetic field sensor can be achieved, in particular to a magnetic field sensor which is attached to a carrier plate, in particular to a printed circuit board, in particular a printed circuit board, which is based to a functional installation state in a torque sensor device, extending perpendicular to the first axis of the flux guide.
  • the third flat band section of at least one tab is bent over 90 ° with respect to the second flat band section of this tab along the third bending edge. That in other words, preferably at least one tab is L-shaped.
  • At least one tab is U-shaped, wherein the tab preferably has at least more than three flat band sections.
  • At least one tab has a fourth flat band portion with a first end and a second end, wherein the fourth flat band portion with the first end adjacent to the third flat band portion and is connected thereto, and preferably the fourth Ribbon portion along a fourth bending edge opposite the third flat band portion of the associated tab is bent, in particular by 90 °.
  • the fourth bending edge of at least one tab runs parallel to the third bending edge of the associated tab, preferably extending the fourth flat band portion parallel to the second flat band portion of the associated tab and in particular a longitudinal center surface of the fourth flat band portion parallel to the first axis.
  • At least one tab has a fifth flat band section with a first end and a nem second end, wherein the fifth flat band portion adjacent to the first end of the second end of the fourth flat band portion and is connected thereto, wherein the fifth flat band portion is preferably folded along a fifth bending edge opposite the fourth flat band portion of the associated tab, in particular folded over.
  • the fifth bending edge of at least one tab runs parallel to the second bending edge of the associated tab, in particular at an angle of 45 ° to the first axis, wherein preferably the fifth flat band portion extends parallel to the first flat band portion of the associated tab and in particular a longitudinal center surface of the fifth flat band portion parallel to the first axis.
  • the fifth flat band section adjoins the flux conductor body with its second end and is preferably connected thereto, the flux conductor body adjoining the fifth flat band section of the associated tab along a sixth bending edge and opposite the fifth flat band section of the tab is folded along the sixth bending edge, wherein the sixth bending edge is preferably parallel to the first axis.
  • This embodiment of a flux guide according to the invention makes it possible to provide a particularly stable, i. mechanically robust flux guide, wherein in particular a flux guide can be provided, which is completely closed in the circumferential direction, whereby a particularly good stability of the flux guide can be achieved.
  • the fifth bending edge extends parallel to the fourth bending edge, preferably perpendicular to the first axis, and in particular while the fifth flat band portion is bent by 90 ° relative to the fourth flat band portion by 90 ° is T and preferably also forms a free end of the flux guide.
  • an inventive flux guide is designed to be open in the circumferential direction. Therefore, in a further advantageous embodiment of a flux guide according to the invention, the flux guide is open in the circumferential direction. This means that in this case the flux conductor is in Circumferential direction extends only over an angle in the circumferential direction, which is smaller than 360 °.
  • the first end of the flat strip and the second end of the flat strip of a flux guide according to the invention are each free ends.
  • the free ends of the flux conductor can be formed either by a flat band section forming the flux conductor body or by a flat band section of one of the tabs, in particular by the second one End of a third, fourth or fifth flat band section of a tab.
  • the free end of the flux conductor be formed for example by the second end of the third flat band portion.
  • the second end of the fourth ribbon portion may form the free end of the flux conductor.
  • the flux guide is closed in the circumferential direction in an alternative embodiment of a flux guide according to the invention.
  • the flux guide is closed in the circumferential direction. That is, in an alternative embodiment of a flux guide according to the invention, the flux guide extends in the circumferential direction about the first axis over an angle of more than 360 °.
  • the first end and the second end of the flat strip or the flux conductor preferably adjoin one another, or are arranged overlapping one another.
  • the first end of the flux guide and the second end of the flux guide are connected to each other, preferably cohesively and / or positively, in particular by means of a dovetail pin connection.
  • a cohesive connection can be produced for example by welding, soldering or gluing.
  • a positive connection can be achieved for example by means of a connecting element such as a rivet, a screw or the like.
  • a positive connection is also a tongue and groove connection, which requires no additional connection element.
  • a dovetail-like connection has proven to be particularly suitable, especially if the pin is not exactly dovetail-shaped, but forms a kind of rounded dovetail, similar to a pin in a puzzle piece.
  • the first end of the flux guide on a pin, preferably a dovetailed or a rounded, puzzle-like pin, wherein the second end of the flux guide has a pin corresponding to the first end recess formed in the Pin of the first end engages and with the recess forms a positive connection at least in the circumferential direction, preferably also in the direction parallel to the first axis.
  • An inventive method for producing a flux guide, in particular for producing a flux guide according to the invention is characterized by the steps:
  • the ribbon preferably having a first end and a second end
  • the flat ribbon provided is preferably already shortened to a defined, required for the production of the flux conductor length and has a first end and a second end.
  • the flat strip can also be provided in the form of an endless semifinished product with only a first free end and shortened to the appropriate length after all the required forming steps.
  • the first flat band portion is preferably folded along a first bending edge, which is parallel to the first axis. That Preferably, the first bending edge is parallel to the first axis.
  • the second bending edge around which the second flat strip section is folded relative to the first flat strip section extends in a plane parallel to the first axis, in particular at an angle of 45 ° to the first axis.
  • the second bending edge of the first tab and the second bending edge of the second tab run parallel to one another with respect to a flux guide produced according to the invention, i. in an end state of the flux guide and not related to a developed intermediate state of the flat strip.
  • both second bending edges i. both the bending edge of the first tab, as well as the bending edge of the second tab, while at an angle of 45 ° to the first axis.
  • the remaining flat strip is shaped into a ring-shaped or ring-shaped flux conductor body in such a way that the flat strip, in particular a longitudinal center surface of the flat strip, extends in the form of a cylinder jacket around the first axis in the region of the flux conductor body.
  • the second flat band section of at least one tab along the second bending edge relative to the first flat band portion of the associated flap is folded, wherein preferably the second bending edge extends in a plane parallel to the first axis, in particular at an angle of 45 ° first axis.
  • the third flat strip section is folded at 90 ° over the second flat strip section along at least one tab with the third bending edge, wherein the third bending edge is preferably perpendicular to the first axis.
  • a method according to the invention is for forming at least one tab with a first end adjacent to the fourth flat band section and connected thereto, fifth flat band section along a fifth bending edge folded, preferably folded over, in particular such that the fifth flat band section then parallel extends to the first flat band portion of the associated tab and in particular a longitudinal central surface of the fifth flat band portion extends parallel to the first axis.
  • the flat strip is bent at a second end of the fifth flat strip section opposite the first end along a sixth bending edge, wherein the sixth bending edge preferably runs parallel to the first axis.
  • the flux conductor is closed in the circumferential direction, for which purpose preferably the first end of the flat strip and the second end of the flat strip are connected to each other, in particular cohesively and / or positively, preferably by means of a dovetail-type pin connection.
  • the flat strip must be shortened in any case before closing the flux guide in the circumferential direction to its final length.
  • the pin of the first end of the flat strip has a pin, preferably a dovetailed or a rounded, puzzle piece-like pin, and wherein the second end of the flat strip has a recess corresponding to the journal of the first end, the pin of the first end is brought into engagement with the recess of the second end of the flat strip in such a way that a positive fit is created.
  • a torque sensor device is characterized in that it has a flux guide according to the invention and / or a flux guide produced according to a method according to the invention.
  • a torque sensor device With regard to the basic structure of the functioning of a torque sensor device according to the invention, reference is made to DE 103 46 332 A1, also referred to above, EP 1 584 908 A2 and the aforementioned EP 2 295 310 A2, wherein a torque sensor device according to the invention differs from the one described in these documents each having a flux guide according to the invention.
  • FIG. 1 shows a first embodiment of a flux guide according to the invention in a perspective individual representation
  • FIG. 2 shows a second exemplary embodiment of a flux guide according to the invention and two magnetic field sensors of a first exemplary embodiment of a torque sensor device according to the invention in exploded view
  • FIG. 3 shows a third exemplary embodiment of a flux guide according to the invention in perspective detail view
  • FIG. 4 shows two flux conductors according to the invention, designed according to a fourth exemplary embodiment, and two stators and a printed circuit board with two magnetic field sensors arranged thereon according to FIG. 2 of an inventive torque sensor device in an exploded view, FIG.
  • FIG. 5 shows two flux guides according to the invention designed according to FIG. 3 together with two stators constructed according to FIG. 4 and a printed circuit board with two magnetic field sensors arranged thereon of a further exemplary embodiment of a torque sensor device according to the invention for a functional state of use of the torque sensor device according to the invention.
  • Fig. 1 shows a first embodiment of a flux guide 10 according to the invention, which is made according to the invention from a flat strip by forming and having a first end 21 and a second end 20, which after forming the flux conductor 10, a first end 20 and a second end 21 of Form flux guide 10.
  • the flux guide 10 according to the invention shown in Fig. 1 is made of a soft magnetic, metallic ribbon, which is available in the form of an endless semifinished product and has been shortened to the flux conductor 10 to the correspondingly required length before forming.
  • the inventive flux guide 10 has a, in this case ring-segment-shaped flux conductor body 1 1, which is formed in this embodiment by three individual ring segments 1 1 A, 1 1 B and 1 1 C, which in total in the circumferential direction extend around a first axis A through an angle of more than 180 °.
  • This flow guide r 10 according to the invention is shaped in such a way that the flat strip or flow conductor body 1 1 extends in the circumferential direction about the first axis A in the manner of a cylinder jacket.
  • the first tab 12 and the second tab 13 are each made by forming the integrally formed flat strip, which forms the flux guide 10 according to the invention, wherein in this embodiment, the first tab 12 and the second tab 13 each by six times folding along an associated bending edge have been shaped.
  • first tab 12 and the second tab 13 have been made by a to the Flußleiter Eisen 1 1, in this case to the Flussleiter stressesegment 1 1 A, adjacent first flat band portion 22 has been bent along a first bending edge 14, in the further course on the first flat band portion 22 adjacent second flat band portion 22 has been turned along a second bending edge 15, ie has been bent by 180 °, an adjacent to the second flat band portion 23 third flat band portion 24 has been bent along a third bending edge 16, a adjacent to the third flat band portion 24 fourth flat band portion 25 has been bent along a fourth bending edge 17, and one to the fourth Flat band portion 25 adjacent fifth flat band portion 26 has been turned along a fifth bending edge 18.
  • the fifth flat band section 26 adjoins the flux conductor body 1 1, in this case the flux conductor segment 1 1 B, and is connected thereto, wherein the flux conductor body 1 1 or in this case the flux conductor body segment 1 1 B has been folded over the fifth flat band section 26 along a sixth bending edge 19.
  • the second tab 13 was formed and then the flux conductor 10 and the other not formed to a tab 12 and 13, other flat band sections, ie in this case, the Flußleiter Eisenmansegmente 1 1 A, 1 1 B and 1 1 C forming flat band sections, the annular flux conductor body 1 1 shaped, in particular bent.
  • each of the first bending edges 14 and the sixth bending edges 19 extend parallel to the first axis A, while the third bending edges 16 and the fourth bending edges 17 extend perpendicular thereto.
  • the second bending edges 15 and the fifth bending edges 18 of both flaps 12 and 13 each extend in a plane parallel to the first axis A, but are inclined by 45 ° to the first axis A, in particular the fifth bending edges 18 in each case parallel to the second bending edges 15 and, in this case, even in particular in a common plane.
  • the second flat strip sections 23 and the fifth flat strip sections 26 of this flux guide 10 according to the invention are in each case folded over around the second bending edge 15 and the fifth bending edge 18, respectively. bent at a bending angle of 180 °.
  • the third flat strip sections 24 are each bent with respect to the second flat strip sections 23 along the third bending edge 16 with a bending angle of ⁇ circumflex over ( ⁇ ) ⁇ .
  • the fourth belt portions 25 with respect to the third flat band sections 24, which are bent along the fourth bending edge 17 with a bending angle of 90 °.
  • Fig. 2 shows a second embodiment of a flux guide 100 according to the invention, also in perspective, but not in detail, but for better understanding in exploded view together with two magnetic field sensors 30A and 30B of a first embodiment of an otherwise not shown, inventive torque sensor device, based on this Representation of the advantageous embodiment of the tabs 12 and 13 of the flux guide 100 of the invention is clearly visible.
  • the third flat band sections 24 of the first lug 12 and the second lug 13 each extend in a plane perpendicular to the first axis A or whose longitudinal center surface is perpendicular to the first axis A.
  • the flux guide 100 according to the invention shown in FIG. 2 does not have any free ends, but is closed in the circumferential direction. That the flux conductor 100 extends in the circumferential direction over an angle of more than 360 °, in which case the two ends of the flux guide 120 and 121 are positively connected to each other by means of a groove-pin connection.
  • the first end 120 of the flux guide 100 has a rounded, dovetail-like, puzzle piece-like, unspecified pin, which engages in a correspondingly formed, also unspecified recess of the second end 121 of the flux guide 100.
  • the flat strip required for forming or for producing the flux guide is already provided with the required length, in particular already with correspondingly shaped ends, wherein preferably the recess and the pin are introduced into the flat strip by punching ,
  • FIG. 3 shows a third embodiment of a flux guide 200 according to the invention, wherein in this flux conductor, the first end of the flux guide 220 and the second end of the flux guide 221 are arranged in the form of a joint to each other and by means of a weld, in particular a butt weld, are materially interconnected.
  • a closed flux guide according to the invention has the advantage over a flux conductor open in the circumferential direction (see FIG. 1) that it has greater mechanical stability, i. has a higher mechanical robustness, as a circumferentially open flux guide.
  • a flow conductor open in the circumferential direction according to the invention has the advantage that it can be produced more cost-effectively and, on the other hand, makes assembly easier.
  • FIG. 4 shows for better understanding the arrangement of two, designed according to a fourth variant, inventive flux guides 300A and 300B of a configured according to a first embodiment, inventive torque sensor device in exploded view together with the components of the torque sensor device, which interact directly with the flux guides 300A and 300B , These are in particular two stator elements 40A and 40B and two magnetic field sensors 30A and 30B arranged on a carrier plate 31 in the form of a printed circuit board 31 with plug contacts 32. Other components of the torque sensor device are not shown. In particular, a permanent ring magnet arranged concentrically within the stator elements 40A and 40B in a functional use state is not shown, which in a torque sensor device according to the invention generates the magnetic field causing the magnetic flux.
  • the two stator elements 40A and 40B each have a region 41 extending in the circumferential direction and in the axial direction in the form of a cylinder jacket, which in the following is referred to as stator ring 41 for the sake of simplicity, and preferably a plurality of evenly distributed in the circumferential direction stator lugs 42 which extend in the axial direction, wherein the two stator elements 40A and 40B in a functionally appropriate Use state of the torque sensor device are each arranged concentrically with the flux guides 300A and 300B along the first axis A.
  • the flux guides 300A and 300B according to the invention shown in FIG. 4 are opened in the circumferential direction between the first tab 12 and the second tab 13 in contrast to the embodiment shown in FIG and not opposite to the tabs 1 12 and 1 13.
  • the opening does not necessarily have to be on the opposite side of the first tab 12 and the second tab 13, but may also be provided between the first tab 1 12 and the second tab 1 13.
  • the first tab 1 12 and the second tab 1 13, as shown here with reference to FIG. 4 also be formed to the outside, which results when the second, unspecified area section, along also unspecified here second bending edge outward instead of inward, ie 180 ° in the other direction relative to FIG. 1, is turned.
  • the fifth flat band sections 326 are not connected to the flux guide body 11, as in the previously described embodiments of FIGS. 1 to 3, but each form a free end 320 and 321 of the flux guide 300A and 300B according to the invention.
  • a further difference from the previously described embodiments of flux guides 10, 100 and 200 according to the invention is that the flux guides 300A and 300B according to the invention shown in FIG. 4 each have a fifth bending edge 318 which does not run at an angle of 45 ° to the first axis A. but extends perpendicular to this. Furthermore, the fifth flat band section 326 is in each case not folded over around the fifth bending edge 318, but merely folded through 90 ° by 90 ° relative to the fifth flat band section 25 by 90 °.
  • the flux guides 300A and 300B of FIG. 4 are arranged in a functional use state with respect to the magnetic field sensors 30A and 30B such that the fifth ribbon sections 326 each have a defined gap Magnetic field sensors 30A and 30B are opposed and not the third ribbon portions 24th
  • the magnetic field sensors 30A and 30B can be arranged at a greater distance from one another on the printed circuit board 31.
  • FIG. 5 shows an assembly arrangement of an exemplary embodiment of a torque sensor device according to the invention with two flux guides 200A and 200B according to the invention, each of which is designed like the flux guide 200 illustrated in FIG. Further, the assembly arrangement includes two stator elements 40A and 40B which are formed like the stator elements 40A and 40B shown in FIG.
  • the two stator elements 40A and 40B and the flux conductors 200A and 200B are each arranged concentrically with each other about the first axis A, wherein each flux conductor 200A or 200B each with a defined gap in the radial direction spaced around the outside around an associated stator element 40A or 40B is arranged.
  • the flux conductors 200A and 200B are each adapted to be fixedly received by a housing, wherein the flux conductors 200A and 200B are preferably held by the housing, the flux conductors 200A and 200B thereto more preferably at least partially encapsulated by the housing and / or can be glued to the housing and / or can be held by terminals in the housing.
  • the flux guides can be accommodated in a housing, not shown here, alternative embodiment of a torque sensor device according to the invention instead of being stationary in the housing be supported on the stator elements via a sliding bearing, in which case the flux conductors can preferably be used together with the stator elements in the housing and in particular secured by the housing against rotation, preferably by one or more projections and / or a recess in the housing.
  • stator elements can preferably be used together with the flux conductors in the radial direction in the housing.
  • the housing is designed accordingly and has corresponding recesses for the lugs of a flux guide according to the invention.
  • the flux conductor bodies 11 can each surround the two stator rings 41 of the stator elements 40A and 40B over a large area, thereby ensuring particularly good collection of the magnetic flux is possible.
  • the respective vertically oriented, third flat band portions 24 of the first tab 12 and the second tab 13 also enable a good transfer of the collected magnetic flux to the magnetic field sensors 30A and 30B, which are arranged on a perpendicular to the first axis A extending circuit board 31, in particular respectively with a defined gap spaced from the third flat band portions 24 of the tabs 12 and 13 of the flux conductors 200A and 200B.
  • the sensor signal generated as a result of the magnetic flux transmitted to the magnetic field sensors 30 A and 30 B can be transmitted by means of an electrical connection, not shown, to a control device also not shown here for further evaluation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un conducteur de flux (10) pour un dispositif détecteur de couple, un procédé de fabrication d'un conducteur de flux (10) et un dispositif détecteur de couple. Le conducteur de flux (10) possède un corps de conducteur de flux (11) qui s'étend dans le sens de la circonférence et une première patte de fixation (12) faisant saillie du corps de conducteur de flux (11) ainsi qu'une deuxième patte de fixation (13) faisant saillie du corps de conducteur de flux (11), disposée espacée de la première patte de fixation (12) dans le sens de la circonférence. Le conducteur de flux (10) est réalisé d'un seul tenant par façonnage d'une bande plate. La première patte de fixation (12) et la deuxième patte de fixation (13) possèdent respectivement au moins une première portion de bande plate (22) adjacente au corps de conducteur de flux (11), respectivement une deuxième portion de bande plate (23) adjacente à la première portion de bande plate (22) et respectivement une troisième portion de bande plate (24) adjacente à la deuxième portion de bande plate (23). La première portion de bande plate (22) est pliée par rapport au corps de conducteur de flux (11) le long d'une arête de pliage (14), la deuxième portion de bande plate (23) est pliée par rapport à la première portion de bande plate (22) le long d'une deuxième arête de pliage (15) et la troisième portion de bande plate (24) est pliée par rapport à la deuxième portion de bande plate (23) le long d'une troisième arête de pliage (16).
PCT/EP2017/080673 2016-12-14 2017-11-28 Conducteur de flux pour un dispositif détecteur de couple, procédé de fabrication d'un conducteur de flux pour un dispositif détecteur de couple et dispositif détecteur de couple Ceased WO2018108519A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016124330.2 2016-12-14
DE102016124330.2A DE102016124330A1 (de) 2016-12-14 2016-12-14 Flussleiter für eine Drehmomentsensorvorrichtung, Verfahren zur Herstellung eines Flussleiters für eine Drehmomentsensorvorrichtung und Drehmomentsensorvorrichtung

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WO2018108519A1 true WO2018108519A1 (fr) 2018-06-21

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WO (1) WO2018108519A1 (fr)

Families Citing this family (3)

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DE102016124370A1 (de) 2016-12-14 2018-06-14 Valeo Schalter Und Sensoren Gmbh Sensorvorrichtung sowie Verfahren zum Zusammenbau einer Sensorvorrichtung
DE102017116454A1 (de) 2017-07-21 2019-01-24 Valeo Schalter Und Sensoren Gmbh Sensorvorrichtung
DE102018121174A1 (de) * 2018-08-30 2020-03-05 Valeo Schalter Und Sensoren Gmbh Flussleiter für eine Drehmomentsensorvorrichtung, Verfahren zur Herstellung eines Flussleiters für eine Drehmomentsensorvorrichtung und Drehmomentsensorvorrichtung

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DE10346332A1 (de) 2002-10-07 2004-04-15 Denso Corp., Kariya Drehmomentsensor
EP1584908A2 (fr) 2004-04-08 2005-10-12 Favess Co. Ltd. Détecteur de couple et son procédé de fabrication
DE102007043502A1 (de) * 2007-09-12 2009-04-02 Valeo Schalter Und Sensoren Gmbh Flussleiterelemente für eine Drehmoment- oder Drehwinkelsensoranordnung
JP2009271055A (ja) * 2008-04-10 2009-11-19 Nsk Ltd トルク検出器及び電動パワーステアリング装置並びにトルク検出器の製造方法
EP2295310A2 (fr) 2008-06-26 2011-03-16 Daesung Electric Co., Ltd. Capteur de couple sans contact pour mécanisme de direction
JP2011232318A (ja) 2010-04-07 2011-11-17 Jtekt Corp 集磁リング及びその製造方法並びにトルクセンサ及び電動パワーステアリング装置

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DE102009047447A1 (de) * 2009-12-03 2011-06-09 Continental Teves Ag & Co. Ohg Sensoranordnung mit Positioniereinrichtung
DE102011121093B4 (de) * 2011-12-14 2025-12-31 Valeo Schalter Und Sensoren Gmbh Sensoreinrichtung zum Messen einer einen Rotationszustand eines Wellenteils eines Kraftfahrzeugs charakterisierenden Größe und Verfahren zum Herstellen eines Sensorteils
DE102012200244A1 (de) * 2012-01-10 2013-07-11 Robert Bosch Gmbh Sensoranordnung
DE112013004892B4 (de) * 2012-10-04 2019-08-29 Schaeffler Technologies AG & Co. KG Drehmomentwandler mit einem Turbinenkolbenschubweg
DE102013006567A1 (de) * 2013-04-05 2014-10-09 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen einer Magneteinheit für eine Sensoreinrichtung eines Kraftfahrzeugs, Magneteinheit, Sensoreinrichtung und Kraftfahrzeug
JP6217609B2 (ja) * 2014-11-27 2017-10-25 株式会社デンソー 磁気検出装置、および、これを用いたトルクセンサ

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DE10346332A1 (de) 2002-10-07 2004-04-15 Denso Corp., Kariya Drehmomentsensor
EP1584908A2 (fr) 2004-04-08 2005-10-12 Favess Co. Ltd. Détecteur de couple et son procédé de fabrication
DE102007043502A1 (de) * 2007-09-12 2009-04-02 Valeo Schalter Und Sensoren Gmbh Flussleiterelemente für eine Drehmoment- oder Drehwinkelsensoranordnung
JP2009271055A (ja) * 2008-04-10 2009-11-19 Nsk Ltd トルク検出器及び電動パワーステアリング装置並びにトルク検出器の製造方法
EP2295310A2 (fr) 2008-06-26 2011-03-16 Daesung Electric Co., Ltd. Capteur de couple sans contact pour mécanisme de direction
JP2011232318A (ja) 2010-04-07 2011-11-17 Jtekt Corp 集磁リング及びその製造方法並びにトルクセンサ及び電動パワーステアリング装置

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