DE102016124330A1 - A flux guide for a torque sensor device, a method of manufacturing a flux guide for a torque sensor device, and a torque sensor device - Google Patents

A flux guide for a torque sensor device, a method of manufacturing a flux guide for a torque sensor device, and a torque sensor device

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Publication number
DE102016124330A1
DE102016124330A1 DE102016124330.2A DE102016124330A DE102016124330A1 DE 102016124330 A1 DE102016124330 A1 DE 102016124330A1 DE 102016124330 A DE102016124330 A DE 102016124330A DE 102016124330 A1 DE102016124330 A1 DE 102016124330A1
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DE
Germany
Prior art keywords
flux
flux guide
tab
flat
bending edge
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.)
Pending
Application number
DE102016124330.2A
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German (de)
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
Priority to DE102016124330.2A priority Critical patent/DE102016124330A1/en
Publication of DE102016124330A1 publication Critical patent/DE102016124330A1/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00Measuring torque, work, mechanical power, or mechanical efficiency in general
    • G01L3/02Rotary-transmission dynamometers
    • G01L3/04Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating
    • G01L3/101Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating involving magnetic or electromagnetic means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D6/00Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10Arrangements 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/14Mechanical 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
    • G01D5/142Mechanical 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
    • G01D5/145Mechanical 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00Measuring torque, work, mechanical power, or mechanical efficiency in general
    • G01L3/02Rotary-transmission dynamometers
    • G01L3/04Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating
    • G01L3/101Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electrical or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets

Abstract

The invention relates to a flux guide (10) for a torque sensor device, a method for producing a flux guide (10) and a torque sensor device wherein the flux guide (10) has a circumferentially extending flux guide body (11) and a first tab projecting from the flux guide body (11) (12) and a second lug (13) spaced from the flow conductor body (11) in the circumferential direction with respect to the first lug (12), wherein the flux guide (10) is made in one piece by forming from a flat strip, the first lug ( 12) and the second lug (13) each have at least one first flat strip section (22) adjacent to the flux guide body (11), one second flat strip section (23) adjacent to the first flat strip section (22) and one each to the second flat strip section ( 23) adjacent, third flat band portion (24), and wherein the first flat band portion (22) opposite de m flux conductor body (11) along a first bending edge (14) is folded, wherein the second flat strip portion (23) relative to the first flat band portion (22) along a second bending edge (15) is folded and wherein the third flat band portion (24) relative to the second flat band portion (23) is folded along a third bending edge (16).

Description

  • 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. In this case, 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 ,
  • Furthermore, 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, wherein in particular motor vehicle 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.
  • Typically, 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.
  • Various measuring principles and sensor arrangements are known for measuring the angle of rotation resulting as a result of an applied torque. 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 US Pat DE 103 46 332 A1 , of the EP 1 584 908 A2 or the EP 2 295 310 A2 ,
  • The in the aforementioned publications DE 103 46 332 A . EP 1 584 908 A2 and EP 2 295 310 A2 Each of the flux guides used in the described torque sensor devices has a strip-shaped, ring-shaped or ring-segment-shaped region, which is referred to below as flow conductor body, and which can be arranged with a defined gap to the adjacent stator in the torque sensor device, in particular cylinder jacket-shaped to surround the stator in the circumferential direction. Thus, the largest possible area for collecting of the magnetic flux available. In addition, 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.
  • The production of such flux guide designed in such a rule by a correspondingly wide band (required width = length of the tabs in the radial direction + width of the strip in the radial direction) is provided, cut away from the circumferentially laterally of the tabs except for the strip-shaped area everything is and then formed annular. Alternatively, a strip with the width of the total diameter can be used, a strip-shaped area with the required width (see above: required width = length of the tabs in the radial direction + width of the strip in the radial direction) are punched and deep drawn, and then the tabs punched out and bent. Both variants attract a lot of waste.
  • In order to provide a torque sensor with a low hysteresis, flux guides made of a high-quality, soft magnetic material are required. However, the suitable, soft magnetic materials are costly, so that a resulting in the production of the flux conductor waste leads to high costs and is therefore undesirable.
  • To solve this problem proposes the JP 2011232318 A to produce the flux guide by forming a suitably cut ribbon.
  • It is an object of the invention to provide an alternative flux guide, in particular an improved flux guide, and an alternative method of fabricating an alternative, particularly improved flux guide, and an alternative torque sensor device having an alternative flux guide.
  • This object is achieved by a flux guide according to the invention, by an inventive method for producing a flux guide and by a torque sensor device according to the invention according to the respective independent claims. Advantageous embodiments of the invention are the subject of the dependent claims, the description and the figures and are explained in more detail below.
  • 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 Flußleiterkörper 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.
  • Due to the fact that 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.
  • 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 about a stator element of a torque sensor device, wherein the flux guide body preferably extends in total over at least an angle of 180 ° in the circumferential direction. In other words, in the case of a flux guide according to the invention, 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 °. In this case, the flux guide body does not have to extend in one piece over an angular range in the circumferential direction of more than 180 °. Rather, the flux conductor body of a flux guide according to the invention 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.
  • As 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. In this case, 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. In particular, the flat strip from which a flux guide according to the invention is made is a sheet metal strip, preferably made of electrical sheet. The flat strip particularly preferably consists of magnetic material or contains magnetic material, for example ferromagnetic material. Particularly preferably, 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. Accordingly, by means of a flux conductor of soft magnetic material, 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.
  • In the case of a flux guide according to the invention, preferably 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.
  • All features and properties described in this application with respect to a flux guide according to the invention are given in relation to the final state of a flux guide according to the invention, unless another state is expressly described in this context. In particular, all features and properties are generally not related to a developed state of the flat strip.
  • The sequence in which the individual flat strip sections of a flux guide according to the invention have been folded is arbitrary within the scope of all technically possible executable variants. In other words, in the case of a flux guide according to the invention, 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. Of course, this applies only in the context of technically possible, i. executable, modifications.
  • In an advantageous embodiment of a flux guide according to the invention, the flat strip, in particular a longitudinal center surface of the flat strip extends in the region 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 area of the flux conductor body, ie by arranging the flux conductor body in a cylinder jacket around the first axis, the flux guide body adjoins the stator assembly in a functional installation state in a torque sensor device with a significantly larger area than in a functional mounting state Radial extension of the ribbon or the flux conductor body around the first axis would be the case. Thus, with a flux guide whose flux conductor body extends in the form of a cylinder jacket around the first axis, the magnetic flux are collected more efficiently.
  • In a further advantageous embodiment of a flux guide according to the invention, the first bending edge of at least one tab runs parallel to the first axis. Preferably, both first bending edges, i. both the first bending edge of the first tab, and the first bending edge of the second tab parallel to the first axis. This makes it possible in a simple manner to design the flux guide in such a way or to edge the first flat band section of at least one tab relative to the flux conductor body such that the longitudinal center face of the flat band then extends parallel to the first axis in the region of the first flat band section of at least one tab.
  • In a further advantageous embodiment of a flux guide according to the invention, 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 the first axis. Preferably, in a flux guide according to the invention, 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. In particular, the second bending edge of the first tab and the second bending edge of the second tab run parallel to one another. As a result, a particularly advantageous embodiment of a flux guide according to the invention can be achieved.
  • In a further advantageous embodiment of a flux guide according to the invention, 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. As a result, a particularly advantageous embodiment of a flux guide according to the invention can be achieved.
  • For the purposes of the invention, folding is understood to mean folding by 180 °, i. the folding with a bending angle of 180 °, wherein by folding a fold around the associated bending edge is formed around.
  • In a further advantageous embodiment of a flux guide according to the invention, the third bending edge of at least one tab runs perpendicular to the first axis. Preferably, both third bending edges, i. 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 extends in an advantageous manner a longitudinal central surface of the flat strip in the region of the third flat band portion of at least one tab normal to the first axis.
  • By means of such an arrangement of the third flat band section of a flux guide according to the invention, 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.
  • In a further advantageous embodiment of a flux guide according to the invention, 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.
  • In particular, at least one tab is U-shaped, wherein the tab preferably has at least more than three flat band sections.
  • Therefore, in a further advantageous embodiment of a flux guide according to the invention 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 °.
  • Preferably, the fourth bending edge of at least one tab runs parallel to the third bending edge of the associated tab, wherein it preferably extends the fourth flat band portion parallel to the second flat band portion of the associated tab, and in particular one Longitudinal center surface of the fourth flat band section runs parallel to the first axis.
  • In a further advantageous embodiment of a flux guide according to the invention, at least one tab has a fifth flat band section with a first end and a second end, wherein the fifth flat band section is adjacent to the first end of the fourth flat band section and connected to the first end, wherein the fifth Ribbon portion is preferably bent along a fifth bending edge opposite the fourth flat band portion of the associated tab, in particular is folded.
  • In this case, preferably 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.
  • In a further advantageous embodiment of a flux guide according to the invention, 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.
  • In some cases, however, it has proved to be advantageous if, alternatively, 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.
  • In some cases, however, it may be expedient, in particular for assembly reasons, when 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. That is, in this case, the flux conductor extends in the circumferential direction only over an angle in the circumferential direction, which is smaller than 360 °.
  • In this case, 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. Depending on the configuration of the flux conductor, in particular depending on the number of flat band sections of the first tab and the second tab, 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.
  • For example, if a tab has only a first, second and third flat band portion, the third flat band portion of the tab having a first end and a second end and having its first end adjacent to and connected to the second ribbon portion, the free end of the flux conductor be formed for example by the second end of the third flat band portion. Accordingly, when a tab has four ribbon portions, the second end of the fourth ribbon portion may form the free end of the flux conductor. The same applies if a tab has five flat band sections, in which case the second end of the fifth flat band section can form the free end of the flux guide. In order to achieve a particularly good mechanical stability, in particular a particularly high mechanical robustness, the flux guide is closed in the circumferential direction in an alternative embodiment of a flux guide according to the invention.
  • 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 °. In this case, 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.
  • In a further advantageous alternative embodiment of a flux guide according to the invention, 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, for example, by welding, soldering or gluing getting produced. 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. In particular, 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.
  • In a further advantageous alternative embodiment of a flux guide according to the invention, 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:
    • Providing a flat strip, the flat strip preferably having a first end and a second end,
    • - Forming the flat strip to the first tab and the second tab respectively by folding a bordering the flow conductor body and connected thereto first flat band portion along a first bending edge, by bending a adjacent to the first flat band portion and connected thereto, the second flat band section along a second bending edge and by folding a third flat strip section adjoining the second flat strip section along a third bending edge, and
    • - Forming the remaining flat band of the flux conductor to a ring or ring segment-shaped flux conductor body.
  • 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. Alternatively, 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 necessary forming steps.
  • When forming the flat strip to the first tab and the second tab, 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.
  • Preferably, 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.
  • Preferably, 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.
  • In particular, 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.
  • In an advantageous embodiment of a method according to the invention, 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.
  • In a further advantageous embodiment of a method according to the invention, 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.
  • In a further advantageous embodiment of a method according to the invention, 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.
  • In a further advantageous embodiment of a method according to the invention for forming at least one tab, a fourth, adjacent to the third flat band section and with This connected flat strip section is folded along a fourth bending edge, preferably by 90 °, in particular such that the fourth flat strip section then extends parallel to the second flat strip section of the associated flap and in particular a longitudinal center surface of the fourth flat strip section runs parallel to the first axis.
  • In a further advantageous embodiment of 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.
  • In a further advantageous embodiment of a method according to the invention, 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.
  • In a further advantageous embodiment of a method according to the invention, 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. In this case, however, the flat strip must be shortened in any case before closing the flux guide in the circumferential direction to its final length.
  • In a further advantageous embodiment of a method according to the invention, wherein 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 the first end with the recess of the second end of the flat band engaged such that a positive connection is formed.
  • A torque sensor device according to the invention 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. With regard to the basic structure of the operation of a torque sensor device according to the invention is based on the already mentioned above DE 103 46 332 A1 which also mentioned EP 1 584 908 A2 as well as the mentioned EP 2 295 310 A2 referenced, wherein a torque sensor device according to the invention, in contrast to the torque sensor devices described in these documents each having a flux guide according to the invention.
  • The advantageous embodiments presented with reference to a flux guide according to the invention and their advantages also apply correspondingly to a method according to the invention for producing a flux guide and to a torque sensor device according to the invention.
  • Further features of the invention will become apparent from the claims, the figures and the description of the figures. All features and feature combinations mentioned above in the description and the following features and feature combinations mentioned in the description of the figures and / or shown alone in the figures can be used not only in the respectively indicated combination but also in other combinations or alone, if this is technically possible makes sense.
  • The invention will now be described with reference to several, each advantageous embodiments with reference to the accompanying drawings. Components or components with the same function and / or configuration are denoted by the same reference numerals.
  • Show it:
    • 1 a first embodiment of a flux guide according to the invention in a perspective individual representation,
    • 2 A second embodiment of a flux guide according to the invention and two magnetic field sensors of a first embodiment of a torque sensor device according to the invention in an exploded view,
    • 3 A third embodiment of a flux guide according to the invention in perspective Einzelteildarstellung,
    • 4 two, designed according to a fourth embodiment, inventive flux guide and two stators and a circuit board with two magnetic sensors arranged thereon according to 2 an inventive torque sensor device in exploded view,
    • 5 two according to 3 trained, inventive flux guide together with two according to 4 trained stators 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 in an arrangement provided for a functional state of use of the torque sensor device according to the invention.
  • 1 shows a first embodiment of a flux guide according to the invention 10 , which is produced according to the invention from a flat strip by forming and a first end 21 and a second end 20 which, after the forming into a flux guide 10 a first end 20 and a second end 21 of the river chief 10 form.
  • The in 1 illustrated flux guide according to the invention 10 is made of a soft magnetic, metallic ribbon, which is available in the form of an endless semi-finished product and before forming into a flux conductor 10 has been shortened to the required length.
  • The in 1 illustrated, inventive flux guide 10 has a, in this case ring segment-shaped flux conductor body 11 which is formed in this embodiment by three individual ring segments 11A, 11B and 11C, which in total in the circumferential direction about a first axis A extend over 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 the flux conductor body 11 cylinder jacket-shaped in the circumferential direction about the first axis A extends around.
  • The first tab 12 and the second tab 13 are each by forming the integrally formed flat strip, which is the flux guide according to the invention 10 forms, wherein in this embodiment, the first tab 12 and the second tab 13 each have been formed by six times folding along an associated bending edge.
  • In particular, the first tab 12 and the second tab 13 made by a to the Flussleiterkörper 11 , in this case to the flux conductor body segment 11A, adjacent first flat band portion 22 along a first bending edge 14 has been bent, in the further course on to the first flat band section 22 adjacent second flat band section 22 along a second bending edge 15 has been turned over, that has been folded by 180 °, one to the second flat band section 23 adjacent third flat band section 24 along a third bending edge 16 has been folded, a to the third flat band section 24 adjoining fourth flat band section 25 along a fourth bending edge 17 has been bent, and a to the fourth flat band section 25 adjacent fifth flat band section 26 along a fifth bending edge 18 has been overturned. The fifth flat band section 26 borders in this embodiment of a flux guide according to the invention 10 while the flux conductor body 11 , in this case, the flux conductor segment 11 B, and is connected thereto, wherein the flux guide body 11 or in this case, the Flußleiterkörpersegment 11 B relative to the fifth flat band portion 26 along a sixth bending edge 19 has been folded.
  • In the same way was the second tab 13 shaped and then became the flux conductor 10 or not to a tab 12 respectively. 13 shaped, remaining flat band sections, ie in this case, the Flussleiterkörpersegmente 11A, 11B and 11C forming flat band sections, the annular flux guide body 11 shaped, in particular bent.
  • In this embodiment, each of the first bending edges 14 and the sixth bending edges 19 parallel to the first axis A while the third bending edges 16 and the fourth bending edges 17 extend perpendicular to this. The second bending edges 15 and the fifth bending edges 18 both tabs 12 and 13 each run in one to the first axis A parallel plane, but are inclined by 45 ° to the first axis A, in particular the fifth bending edges 18 each to the second bending edges 15 parallel and, in this case, even in particular in a common plane.
  • The second flat band sections 23 and the fifth ribbon portions 26 this flux guide according to the invention 10 are each about the second bending edge 15 or the fifth bending edge 18 turned over, ie folded with a bending angle of 180 °. The third flat band sections 24 are, however, in each case opposite the second flat band sections 23 along the third bending edge 16 bent at a bending angle of 90 °. Likewise, the fourth compartment sections 25 opposite the third flat band sections 24 , which along the fourth bending edge 17 bent at a bending angle of 90 °.
  • This results as based on 1 is clearly visible, an inventive flux guide 10 in which the third flat band sections 24 perpendicular to the first axis A extend and thus in a simple manner in a torque sensor device according to the invention relative to one, on a perpendicular to the first axis A the flux conductor arranged printed circuit board mounted magnetic field sensor can be placed so that an optimal forwarding of the flux from the conductor collected flow to the magnetic field sensor can be achieved.
  • The inventive design of the two tabs 12 and 13 further leads to a particularly stable embodiment of a flux guide according to the invention 10 , in particular in the area of the first tab 12 and the second tab 13 so that a secure positioning relative to a magnetic field sensor of a torque sensor device can be achieved and thus a precise transmission of the magnetic flux.
  • 2 shows a second embodiment of a flux guide according to the invention 100 , also in perspective, but not in detail, but for better understanding in exploded view together with two magnetic field sensors 30A and 30B a first embodiment of an otherwise not shown, inventive torque sensor device, based on this illustration, the advantageous embodiment of the tabs 12 and 13 the flux guide according to the invention 100 is clearly recognizable.
  • In particular, it can be seen that it is advantageous if the third flat band sections 24 the first tab 12 and the second tab 13 each in a plane perpendicular to the first axis A extend and their longitudinal central surface perpendicular to the first axis A runs.
  • Unlike the in 1 illustrated embodiment of a flux guide according to the invention 10 has the in 2 illustrated flux guide according to the invention 100 no free ends, but is closed in the circumferential direction. That means 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-and-mortise.
  • The first end points to this 120 of the river chief 100 a rounded, dovetail-like, puzzle-piece-like, unspecified pin, which in a correspondingly formed, also unspecified recess of the second end 121 of the river chief 100 intervenes.
  • To produce this flux guide, it is advantageous if 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 ,
  • Closing the flux conductor 100 is done in this embodiment after completion of the forming, to which the pin of the first end 120 with the recess of the second end 121 has been engaged.
  • 3 shows a third embodiment of a flux guide according to the invention 200 , wherein in this flux guide, the first end of the flux guide 220 and the second end of the flux guide 221 are arranged in the form of a shock to each other and by means of a weld, in particular a butt seam, are materially interconnected.
  • A closed, inventive flux guide, as in the 2 and 3 is opposite to a circumferentially open flux guide (see 1 ) has the advantage that it has a greater mechanical stability, ie has a higher mechanical robustness, as a circumferentially open flux guide.
  • On the other hand, 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.
  • 4 shows for better understanding the arrangement of two, designed according to a fourth variant, inventive flux guide 300A and 300B a configured according to a first embodiment of the invention, the torque sensor device in exploded view together with the components of the torque sensor device, which directly with the flux guides 300A and 300B interact. These are in particular two stator elements 40A and 40B as well as two on a carrier plate 31 in the form of a printed circuit board 31 with plug contacts 32 arranged magnetic field sensors 30A and 30B , Other components of the torque sensor device are not shown. In particular, in a functional condition of use, one is concentric within the stator elements 40A and 40B not shown, which is generated in a torque sensor device according to the invention, the magnetic flux for the cause of the magnetic field.
  • The two stator elements 40A and 40B have in this first embodiment of a torque sensor device according to the invention in each case one, preferably designed as a closed ring, cylinder jacket-shaped in the circumferential direction and in the axial direction extending region 41 on, which in the following for the sake of simplicity as a stator ring 41 is referred to, and preferably a plurality of evenly distributed circumferentially arranged stator lugs 42 , Which extending in the axial direction, wherein the two stator elements 40A and 40B in a functional use state of the torque sensor device, each concentric with the flux conductors 300A and 300B along the first axis A are arranged.
  • As based on 4 well recognizable, are those in 4 illustrated, inventive flux guide 300A and 300B unlike in 1 illustrated embodiment between the first tab 112 and the second tab 113 open in the circumferential direction and not opposite the tabs 112 and 113 ,
  • In other words, in the case of a flux guide according to the invention, the opening does not necessarily have to be on the opposite side from the first tab 12 and the second tab 13 but can also be between the first tab 112 and the second tab 113 be provided. Furthermore, the first tab 112 and the second tab 113 , as shown here by 4 be shown, also formed to the outside, which results when the second, unspecified here surface portion along the also not designated here second bending edge outwards instead of inwards, ie by 180 ° in the other direction opposite 1 , is being transhipped.
  • At the in 4 shown, flux guides according to the invention 300A and 300B are also the fifth flat band sections 326 Moreover, as in the previously described embodiments of the 1 to 3 , each with the flux guide body 11 but each form a free end 320 respectively. 321 the flux guide according to the invention 300A respectively. 300B ,
  • Another difference from the previously described embodiments of inventive flux guide 10 . 100 and 200 is that in 4 illustrated flux guides according to the invention 300A and 300B one fifth bending edge each 318 which are not at an angle of 45 ° to the first axis A runs, but extends perpendicular to this. Furthermore, the fifth flat band section 326 in each case not around the fifth bending edge 318 turned over, but only 90 ° to this over the fifth flat band section 25 folded by 90 °.
  • In addition, the flux guides 300A and 300B out 4 in a functional use state relative to the magnetic field sensors 30A and 30B arranged such that the fifth flat band sections 326 each with a defined gap the magnetic field sensors 30A and 30B opposite and not the third flat band sections 24 ,
  • In the 4 shown embodiment of the tabs 112 and 113 the flux guide according to the invention 300A and 300B has the advantage that the magnetic field sensors 30A and 30B with a greater distance from each other on the circuit board 31 can be arranged.
  • This allows, as based on 4 clearly recognizable, the arrangement of the plug contacts 32 in an area between the magnetic field sensors 30A and 30B , As a result, the overall length of a torque sensor device according to the invention can be upwards, with reference to the illustration in FIG 4 , or kept small in the radial direction and / or reduced.
  • 5 shows an assembly arrangement of an embodiment of a torque sensor device according to the invention with two flux guides according to the invention 200A and 200B , each one like the one in 3 illustrated flux guides 200 are formed. Furthermore, the assembly arrangement has two stator elements 40A and 40B on, like the stator elements 40A and 40B , in the 4 are shown, are formed.
  • Here are the two stator elements 40A and 40B as well as the flux guides 200A and 200B each concentric with each other about the first axis A each flux conductor 200A or 200B being spaced apart at a defined gap in the radial direction around an associated stator element 40A respectively. 40B is arranged.
  • At the in 5 shown assembly assembly of a torque sensor device according to the invention are the flux guides 200A and 200B each adapted to be received in a stationary manner by a housing, wherein the flux conductors 200A and 200B can preferably be held by the housing, wherein the flux conductors 200A and 200B For this purpose, it may be particularly preferably at least partially encapsulated by the housing and / or adhesively bonded to the housing and / or held in the housing by clamps.
  • For a particularly small installation space requirement in the radial direction, the flux guides can be accommodated in the housing in a housing, not shown, alternative embodiment of a torque sensor device to be supported in each case via a sliding bearing on the stator, in which case the flux conductors preferably together with the stator elements can be inserted into the housing and are secured in particular by the housing against rotation, preferably by one or more projections and / or a recess in the housing.
  • In a particularly advantageous embodiment of a torque sensor device according to the invention in this context, the stator elements can preferably be used together with the flux conductors in the radial direction in the housing. It goes without saying that in this case the housing is designed accordingly and has corresponding recesses for the lugs of a flux guide according to the invention.
  • By each cylinder jacket-shaped configuration of the flux conductor body 11 or by the inventive production of the flux conductors 200A and 200B from a ribbon, the flux conductor bodies can 11 the two stator rings 41 The stator 40A and 40B are each surrounded over a large area, whereby a particularly good collection of the magnetic flux is possible.
  • The respectively vertically oriented, third flat band sections 24 the first tab 12 and the second tab 13 also allow good transfer of the collected magnetic flux to the magnetic field sensors 30A and 30B which is on a perpendicular to the first axis A extending circuit board 31 are arranged, in particular each with a defined gap spaced from the third flat band sections 24 the tabs 12 and 13 the river conductor 200A and 200B ,
  • Via plug contacts 32 the circuit board 31 For example, the sensor signal generated as a result of the magnetic flux transmitted to the magnetic field sensors 30A and 30B can be transmitted by means of an electrical connection, not shown, to a control device, likewise not shown here, for further evaluation.
  • In this case, a variety of modifications, in particular to structural modifications, compared to the illustrated embodiments possible without departing from the content of the claims.
  • LIST OF REFERENCE NUMBERS
  • 10, 100, 200,
    inventive flux guide
    200A, 200B,
    300A, 300B
    11
    Flow conductor body
    12, 112
    first tab
    13, 113
    second tab
    14
    first bending edge
    15
    second bending edge
    16
    third bending edge
    17
    fourth bending edge
    18, 318
    fifth bending edge
    19
    sixth bending edge
    20, 120, 220, 320
    first end of the flux guide
    21, 121, 221, 321
    second end of the flux guide
    22
    first flat band section
    23
    second flat band section
    24
    third flat band section
    25
    fourth flat band section
    26, 326
    fifth flat band section
    30A, 30B
    magnetic field sensor
    31
    circuit board
    32
    plug contacts
    40, 40A, 40B
    stator
    41
    stator
    42
    Statorlaschen
    A
    first axis
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 10346332 A1 [0008, 0066]
    • EP 1584908 A2 [0008, 0009, 0066]
    • EP 2295310 A2 [0008, 0009, 0066]
    • DE 10346332 A [0009]
    • JP 2011232318 A [0012]

Claims (24)

  1. Flux guide (10, 100, 200, 200A, 200B, 300A, 300B) for a torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle, wherein the flux guide (10, 100, 200, 200A, 200B, 300A, 300B) for collecting a magnetic flux of a stator of a torque sensor device comprises a circumferentially extending flux guide body (11) about a first axis (A) and for propagating the collected magnetic flux to a magnetic field sensor (30A, 30B) of a torque sensor device 11) protruding first tab (12, 112) and at least one, in the circumferential direction to the first tab (12, 112) spaced from the flux conductor body (11) protruding, second tab (13, 113), wherein the flux guide (10, 100, 200, 200A, 200B, 300A, 300B) is made in one piece by forming from a flat strip, characterized in that the first flap (12, 112) and the second tab (13, 113) in each case at least one of the flux conductor body (11) adjacent and connected thereto, the first flat band portion (22), in each case one of the first flat band portion (22) adjacent and connected thereto, the second flat band portion (23) and respectively a third flat strip section (24) adjoining the second flat strip section (23) and connected thereto, wherein the first flat strip section (22) is folded over a first bending edge (14) opposite the flux guide body (11), the second flat strip section (23 ) is bent over a second bending edge (15) in relation to the first flat strip section (22), and wherein the third flat strip section (24) is folded over a third bending edge (16) in relation to the second flat strip section (23).
  2. Flux conductors (10, 100, 200, 200A, 200B, 300A, 300B) according to Claim 1 , characterized in that the flat strip, in particular a longitudinal center surface of the flat strip, in the region of the flux conductor body (11) extends in the form of a cylinder jacket around the first axis (A).
  3. Flux conductors (10, 100, 200, 200A, 200B, 300A, 300B) according to Claim 1 or 2 , characterized in that the first bending edge (14) of at least one tab (12, 112, 13, 13) runs parallel to the first axis (A).
  4. Flux guide (10, 100, 200, 200A, 200B, 300A, 300B) according to at least one of the preceding claims, characterized in that the second bending edge (15) of at least one tab (12, 112, 13, 13) in a direction to the first axis (A ) parallel plane, in particular at an angle of 45 ° to the first axis (A).
  5. Flux conductor (10, 100, 200, 200A, 200B, 300A, 300B) according to at least one of the preceding claims, characterized in that at least the second flat band section (23) of at least one tab (12, 112, 13, 13) faces the first flat band section (22 ) of this tab (12, 112, 13, 13) is folded over along the second bending edge (15).
  6. Flux guide (10, 100, 200, 200A, 200B, 300A, 300B) according to at least one of the preceding claims, characterized in that the third bending edge (16) of at least one tab (12, 112; 13, 113) perpendicular to the first axis (A) runs.
  7. Flux conductor (10, 100, 200, 200A, 200B, 300A, 300B) according to at least one of the preceding claims, characterized in that the third flat strip section (24) at least one tab (12, 112, 13,113) opposite the second flat strip section (23) this lug (12, 112, 13, 13) is bent by 90 ° along the third bending edge (16).
  8. A flux guide (10, 100, 200, 200A, 200B, 300A, 300B) according to at least one of the preceding claims, characterized in that at least one tab (12, 112, 13, 13) comprises a fourth ribbon section (25) having a first end and a first flat section second end, wherein the fourth ribbon portion (25) with the first end adjacent to the third ribbon portion (24) and is connected thereto, and preferably wherein the fourth flat band portion (25) along a fourth bending edge (17) opposite the third ribbon portion (25 ) of the associated flap (12, 112, 13, 13) is bent, in particular by 90 °.
  9. Flux conductors (10, 100, 200, 200A, 200B, 300A, 300B) according to Claim 8 characterized in that at least one tab (12,112; 13,113) has a fifth ribbon portion (26,326) having a first end and a second end, the fifth ribbon portion (26,326) having the first end at the second end of the fourth flat band section (25) adjoins and is connected thereto, the fifth flat band section (26, 326) preferably being folded along a fifth bending edge (18, 318) relative to the fourth flat band section (25) of the associated tab (12, 112; 13, 11) is, in particular, handled.
  10. Flux conductors (10, 100, 200, 200A, 200B) after Claim 9 , characterized in that the fifth flat band section (26) with its second end adjoins the flux conductor body (11) and is preferably connected thereto, wherein the flux conductor body (11) in particular along a sixth bending edge (19) to the fifth flat band cut (26) the associated tab (12, 13) adjacent and relative to the fifth flat band portion (26) of the tab (12, 13) along the sixth bending edge (19) is folded, wherein the sixth bending edge (19) is preferably parallel to the first axis (A).
  11. Flux conductor (10, 300A, 300B) according to at least one of the preceding claims, characterized in that the flux guide (10, 300A, 300B) is open in the circumferential direction.
  12. Flux guide (100, 200, 200A, 200B) according to at least one of Claims 1 to 10 , characterized in that the flux guide (100, 200, 200A, 200B) is closed in the circumferential direction.
  13. Flux conductors (100, 200, 200A, 200B) after Claim 12 , characterized in that a first end (120, 220) of the flux guide (100, 200, 200A, 200B) and a second end (121, 221) of the flux guide (100, 200, 200A, 200B) are interconnected, preferably cohesively and / or form-fitting, in particular by means of a dovetail-type pin connection.
  14. Flux guide (100) to Claim 13 characterized in that the first end (120) of the flux guide comprises a pin, preferably a dovetailed or a rounded, puzzle piece-like pin, the second end (121) of the flux guide having a recess corresponding to the pin of the first end (120), in which engages the pin of the first end (120) and forms a positive connection with the recess at least in the circumferential direction, preferably also in the direction parallel to the first axis (A).
  15. A method for producing a flux guide (10, 100, 200, 200A, 200B, 300A, 300B) for a torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle, in particular for producing a according to at least one of Claims 1 to 14 formed flux guide (10, 100, 200, 200A, 200B, 300A, 300B), wherein the flux guide (10, 100, 200, 200A, 200B, 300A, 300B) for collecting a magnetic flux of a stator of a torque sensor device around a first Axis (A) has annular or ring-shaped circumferentially extending flux guide bodies (11) and for propagating the collected magnetic flux to a magnetic field sensor (30A, 30B) of a torque sensor device comprises a first tab (12, 112) projecting from the flux guide body (11) and at least a second tab (13, 13) spaced apart from the flux guide body (11) in the circumferential direction with respect to the first tab (12, 112), wherein the flux guide (10, 100, 200, 200A, 200B, 300A, 300B) is formed integrally by forming from a A flat strip is produced, characterized by the steps: providing the flat strip, wherein the flat strip preferably has a first end (20, 120, 220, 320) and a second end (21, 121, 221, 321), - reshaping of the flat strip to the first tab (12, 112) and the second tab (13,113) respectively by bending a to the flux conductor body (11) adjacent and connected thereto, the first flat band portion (22) along a first bending edge (14 ), by bending a second flat strip section (23) adjoining the first flat strip section (22) and connected thereto, along a second bending edge (15) and by bending a third flat strip section adjoining the second flat strip section (23) ( 24) along a third bending edge (16), and - forming the remaining flat band of the flux guide (10, 100, 200, 200A, 200B, 300A, 300B) to a ring or ring segment-shaped flux conductor body (11).
  16. Method according to Claim 15 , Characterized in that the rest of the ribbon is deformed in such a way to an annular or ring segment-shaped flow conductor body (11), that then the flat belt, in particular a longitudinal center area of the flat strip, the area of the flux guide body (11) a cylindrical shell about the first axis (A) around extends.
  17. Method according to Claim 15 or 16 characterized in that the second ribbon portion (23) of at least one flap (12,112; 13,113) is folded along the second bending edge (15) opposite the first ribbon portion (22) of the associated flap (12,112; 13,113), preferably the second bending edge (15) extends in a plane parallel to the first axis (A), in particular at an angle of 45 ° to the first axis (A).
  18. Method according to at least one of Claims 15 to 17 , characterized in that at least one tab (12, 112; 13,113) of the third flat strip portion (24) relative to the second flat band portion (23) along the third bending edge (16) is bent by 90 °, wherein the third bending edge (16) preferably perpendicular to the first axis (A).
  19. Method according to at least one of Claims 15 to 18 , characterized in that for forming at least one tab (12, 112; 13,113) adjacent to the third flat band portion (24) and connected thereto, fourth flat strip portion (25) along a fourth bending edge (17) is folded, preferably by 90 ° , in particular so, the s is the fourth Ribbon portion (25) then parallel to the second flat band portion (23) of the associated tab (12, 112, 13,113) and in particular a longitudinal center surface of the fourth flat band portion (25) parallel to the first axis (A).
  20. Method according to at least one of Claims 15 to 19 , characterized in that for forming at least one tab (12, 112, 13, 13) a fifth flat belt section (26, 326) adjoining and connected to the fourth flat belt section (25) along a first bending edge (18, 318 ), preferably folded over, in particular such that the fifth flat band section (26) then extends parallel to the first flat band section (22) of the associated tab (12, 13) and in particular a longitudinal center surface of the fifth flat band section (26) parallel to the first axis (A) runs.
  21. Method according to Claim 20 , characterized in that the ribbon at a second, the first end opposite the first flat band portion (26) along a sixth bending edge (19) is folded, wherein the sixth bending edge (19) preferably parallel to the first axis (A).
  22. Method according to at least one of Claims 15 to 21 , characterized in that the flux conductor (100, 200, 200A, 200B) is closed in the circumferential direction, for which purpose preferably the first end (120, 220) of the flat strip and the second end (121, 221) of the flat strip are connected to each other, in particular cohesively and / or positively, preferably by means of a dovetail-type pin connection.
  23. Method according to Claim 22 in that the first end (120) of the flat strip has a pin, preferably a dovetailed or a rounded, puzzle piece-like pin, and wherein the second end (121) of the flat strip has a recess corresponding to the pin of the first end (120), characterized in that the pin of the first end (120) is brought into engagement with the recess of the second end (121) of the flat strip in such a way that a form fit occurs.
  24. Torque sensor device for detecting a torque applied to a steering shaft of a motor vehicle with a flux guide (10, 100, 200, 200A, 200B, 300A, 300B), characterized in that the flux guide (10, 100, 200, 200A, 200B, 300A, 300B ) after one of the Claims 1 to 14 is formed and / or according to a method of Claims 15 to 23 is made.
DE102016124330.2A 2016-12-14 2016-12-14 A flux guide for a torque sensor device, a method of manufacturing a flux guide for a torque sensor device, and a torque sensor device Pending DE102016124330A1 (en)

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DE102016124330.2A DE102016124330A1 (en) 2016-12-14 2016-12-14 A flux guide for a torque sensor device, a method of manufacturing a flux guide for a torque sensor device, and a torque sensor device
PCT/EP2017/080673 WO2018108519A1 (en) 2016-12-14 2017-11-28 Flow conductor for a torque sensor apparatus, method for producing a flow conductor for a torque sensor apparatus, and torque sensor apparatus

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WO2019016124A1 (en) 2017-07-21 2019-01-24 Valeo Schalter Und Sensoren Gmbh Sensor device
DE102018121174A1 (en) * 2018-08-30 2020-03-05 Valeo Schalter Und Sensoren Gmbh Flow conductor for a torque sensor device, method for producing a flow conductor for a torque sensor device and torque sensor device

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