[go: up one dir, main page]

WO2011048846A1 - Torque sensor - Google Patents

Torque sensor Download PDF

Info

Publication number
WO2011048846A1
WO2011048846A1 PCT/JP2010/060520 JP2010060520W WO2011048846A1 WO 2011048846 A1 WO2011048846 A1 WO 2011048846A1 JP 2010060520 W JP2010060520 W JP 2010060520W WO 2011048846 A1 WO2011048846 A1 WO 2011048846A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
yokes
portions
ring portion
yoke
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/JP2010/060520
Other languages
French (fr)
Japanese (ja)
Inventor
賢次郎 松本
敏宏 米田
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.)
Minebea AccessSolutions Inc
Original Assignee
Honda Lock Manufacturing Co Ltd
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 Honda Lock Manufacturing Co Ltd filed Critical Honda Lock Manufacturing Co Ltd
Publication of WO2011048846A1 publication Critical patent/WO2011048846A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets

Definitions

  • the present invention relates to a torque sensor that detects torsion between a first shaft and a second shaft that are coaxially connected via a torsion bar.
  • a ring-shaped multipolar permanent magnet is fixed to the first shaft connected to the second shaft by a torsion bar, and a pair of rotating yokes each having a claw portion facing the permanent magnet are fixed to the second shaft.
  • a torque sensor configured as described above is known from Patent Document 1.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a torque sensor capable of reducing the magnetization cost and suppressing the influence of magnetic force variation between magnetic poles.
  • the present invention provides a torque sensor that detects torsion between a first shaft and a second shaft that are coaxially connected via a torsion bar, and includes a first ring portion and a first ring portion.
  • a first rotating yoke that has a plurality of first claw portions that extend in the axial direction and are connected to a plurality of locations at equal intervals in the circumferential direction, and is fixed to the first shaft;
  • a second ring portion that is formed in a large diameter and coaxially surrounds the first ring portion, and a plurality of first rings that extend in the axial direction and are connected to a plurality of locations at equal intervals in the circumferential direction of the second ring portion.
  • a second rotating yoke having a plurality of second claw portions disposed between the claw portions and fixed to the first shaft, and radially magnetized so that the inner peripheral side and the outer peripheral side have different poles from each other
  • a ring-shaped permanent magnet fixedly disposed between the first and second ring portions;
  • a plurality of third claw portions that are connected to a plurality of locations at equal intervals in the circumferential direction of the first ring portion and the third ring portion, and are fixed to the second shaft with a plurality of third claw portions facing the first and second claw portions.
  • the first and second magnetism collecting yokes Provided between the first and second magnetism collecting yokes, the first and second magnetism collecting yokes arranged at fixed positions facing the third and fourth ring portions, respectively.
  • a first feature is that a magnetic detection element is provided.
  • the present invention provides a sensor housing made of synthetic resin that is disposed at a fixed position so as to cover the first to fourth rotating yokes, the permanent magnets, the first and second magnetic flux collecting yokes. Further, the second feature is that the permanent magnet and both the magnetic flux collecting yokes are insert-coupled.
  • the first and second rotating yokes, and a first holder made of synthetic resin in which a part of the first and second rotating yokes are insert-coupled A first shaft-side rotary yoke body fixed to the first shaft, and a third and fourth rotary yoke, and a second holder made of synthetic resin in which a part of the third and fourth rotary yokes are insert-bonded.
  • a third feature is that the second shaft side rotary yoke body provided is fixed to the second shaft.
  • the Hall IC 22 of the embodiment corresponds to the magnetic detection element of the present invention.
  • the inner circumferential side and the outer circumferential side are different from each other between the first ring portion of the first rotating yoke and the second ring portion of the second rotating yoke fixed to the first shaft. Since the ring-shaped permanent magnets are fixedly arranged, the first and second claw portions of the first and second rotary yokes have different magnetic poles. On the other hand, the third claw portion of the third rotating yoke fixed to the second shaft and the fourth claw portion of the fourth rotating yoke are opposed to the first and second claw portions, and the third and fourth rotating yokes.
  • the magnetic detection element is provided between a pair of magnetism collecting yokes fixedly arranged corresponding to the third and fourth ring portions individually, if a twist occurs between the first axis and the second axis, The relative position in the circumferential direction between the second claw portion and the third and fourth claw portions changes to change the magnetic flux between the first and second magnetic flux collecting yokes. A twist between the shafts is detected.
  • the ring-shaped permanent magnet is magnetized in the radial direction, the magnetizing cost can be reduced, and the influence of the magnetic force variation between the magnetic poles can be reduced.
  • the sensor output when adjusting the variation in magnetic force by changing the sensor setting (e.g., neutral position output), the sensor output can be adjusted only with a torque sensor incorporating a permanent magnet and a magnetic detection element. Therefore, it is possible to reduce the number of steps for assembling the intermediate portion of the steering shaft in the electric power steering apparatus.
  • the sensor setting e.g., neutral position output
  • the first shaft side including the first and second rotating yokes and the first holder made of synthetic resin in which a part of the first and second rotating yokes are insert-bonded.
  • FIG. 1 is a longitudinal sectional view of the torque sensor.
  • FIG. 2 is an exploded vertical sectional view of the torque sensor.
  • FIG. 3 is an exploded perspective view of the first rotating yoke, the second rotating yoke, the permanent magnet, the third rotating yoke, the fourth rotating yoke, the first magnetic collecting yoke, and the second magnetic collecting yoke.
  • FIG. 4 is a perspective view of the first shaft-side rotating yoke body fixed to the first shaft and the second shaft-side rotating yoke body fixed to the second shaft.
  • FIG. 5 is a perspective view of the first shaft-side rotating yoke body.
  • FIG. 5 is a perspective view of the first shaft-side rotating yoke body.
  • FIG. 6 is a view taken in the direction of arrow 6 in FIG.
  • FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG. 2 in a state where the torsion bar is omitted.
  • FIG. 8 is an exploded perspective view of the first magnetism collecting yoke, the second magnetism collecting yoke, the Hall IC, the third holder, and the terminals.
  • FIG. 9 is an overall perspective view of the torque sensor.
  • FIG. 10 is a diagram showing changes in the relative positions of the first to fourth claw portions.
  • the intermediate portion of the steering shaft is configured in accordance with the present invention so as to detect the twist between the first shaft 11 and the second shaft 12 connected by the torsion bar 13.
  • a torque sensor is provided.
  • the torque sensor includes a first ring portion 15a and a second ring portion 16a, and first and second rotary yokes 15 and 16 fixed to the first shaft 11, and first and second ring portions 15a and 15a.
  • a ring-shaped permanent magnet 17 fixedly disposed between 16a, and third and fourth rotating yokes 18, 19 having a third ring portion 18a and a fourth ring portion 19a, respectively, and fixed to the second shaft 12.
  • a pair of magnetic flux collecting yokes 20 and 21 disposed at fixed positions facing the third and fourth ring portions 18a and 19a, respectively, and a Hall IC 22 which is a magnetic detection element provided between the magnetic flux collecting yokes 20 and 21. ... And.
  • the first rotating yoke 15 includes a first ring portion 15a and a plurality of portions extending in the axial direction, for example, six portions that are provided at equal intervals in the circumferential direction of the first ring portion 15a. .., And six first claw portions 15b, 15b,... Are integrally formed, and the second rotary yoke 16 is formed with a diameter larger than that of the first ring portion 15a and coaxially surrounds the first ring portion 15a.
  • the first claw portions 15b, 15b ... and the second claw portions 16b, 16b ... have their claw portions 15b, 15b ...; 16b, 16b ... centered on the axis of the first shaft 11.
  • the first and second rotary yokes 15 and 16 the cylindrical first collar 23 fixed to the first shaft 11 by press-fitting or the like, the first rotary yoke 15,
  • the first holder 24 made of synthetic resin in which a part of the second rotating yoke 16 and the first collar 23 are insert-coupled constitutes a first shaft-side rotating yoke body 25.
  • the first holder 24 covers the lower outer periphery of the first collar 23 and connects the first ring portion 15 a of the first rotating yoke 15 and the first collar 23 that are disposed below the first collar 23 with a space therebetween. Downward from the first annular portion 24a so as to fill the axially extending grooves 36 provided at a plurality of, for example, three locations, spaced at equal intervals in the circumferential direction of the outer surface of the first ring portion 15a. And a plurality of, for example, three connecting portions 24b extending to the lower portion of the second rotating yoke 16 and the lower portions of the second ring portion 16a and the first ring portion 15a.
  • the portion of the outer periphery of the first ring portion 15a of the first rotating yoke 15 excluding the connecting portion 24b ... while being held by the first holder 24 is the second ring portion 16a side of the second rotating yoke 16.
  • 16b, 16b are exposed to the first ring portion 15a and the entire inner circumference of the second ring portion 16a of the second rotary yoke 16 is exposed.
  • the outer surface of... Faces outward along the same virtual circle centered on the axis of the first shaft 11.
  • the permanent magnet 17 is formed in a ring shape by being magnetized in the radial direction so that the inner peripheral side and the outer peripheral side are different from each other, and is fixedly disposed between the first and second ring portions 15a, 16a.
  • the inner periphery of the permanent magnet 17 facing the outer periphery of the first ring portion 15a in the first rotating yoke 15 is magnetized, for example, to the N pole, whereas the second ring portion 16a in the second rotating yoke 16 is The outer periphery of the permanent magnet 17 facing the inner periphery is magnetized, for example, to an S pole.
  • the third rotating yoke 18 includes a third ring portion 18a and a plurality of, for example, six third claw portions 18b provided continuously at a plurality of locations, for example, six locations at equal intervals in the circumferential direction of the third ring portion 18a. 18b ..., and the fourth rotating yoke 19 includes a fourth ring portion 19a and a plurality of, for example, a plurality of, for example, six portions provided at equal intervals in the circumferential direction of the fourth ring portion 19a. It has six 4th nail
  • the third ring portion 18a and the fourth ring portion 19a are formed to have the same diameter and are disposed at positions shifted from each other in the axial direction of the second axis, and the third claw portions 18b, 18b,.
  • the claw portions 19b, 19b... Are formed so as to extend in the axial direction so that the claw portions 18b, 18b... 19b, 19b.
  • the first and second rotating yokes 19 have the third and fourth claw portions 18b, 18b... 19b, 19b... With their inner surfaces along the same virtual circle centered on the axis of the second shaft 12.
  • the first and second claw portions 15b, 15b ...; 16b, 16b ... are arranged so as to face the outer sides in the radial direction.
  • the second holder 27 covers the upper outer periphery of the second collar 26 and connects the fourth ring portion 19 a of the fourth rotating yoke 19 and the second collar 26 disposed above the second collar 26 with a space therebetween.
  • the second annular portion 27a and the third and fourth ring portions 18a, 19a located at positions separated from each other in the upper axial direction of the second collar 26 are connected to each other and the third and fourth claw portions 18b, 18b,. 19b, 19b...
  • the inner surfaces of the third and fourth claw portions 18b, 18b... 19b, 19b... At 18 and 19 are flush with the inner peripheral surface of the second cylindrical portion 27b of the second holder 27.
  • the first and second magnetic collecting yokes 20, 21 are arc portions 20 a, 21 a formed in an arc shape centering on the axis of the second shaft 12, and arc portions 20 a, 21 a.
  • the magnetic flux collecting portions 20b, 20b; 21b, 21b projecting outward in the radial direction from the central portion in the circumferential direction are integrally formed, and are formed in the same shape.
  • the rotating yoke 18 is arranged so as to oppose the outer periphery of the third ring portion 18a and the inner periphery of the arc portion 21a is arranged to oppose the outer periphery of the fourth ring portion 19a in the fourth rotating yoke 19, and both the magnetism collecting portions 20b, 21b. ; Hall ICs 22 and 22 are provided between 20b and 21b.
  • the magnetism collecting portions 20b, 20b; 21b, 21b are projected at two locations spaced apart in the circumferential direction of the arc portions 20a, 21a in the first and second magnetism collecting yokes 20, 21, and two pairs forming a pair
  • the Hall ICs 22 and 22 are provided between the magnetism collecting portions 20b and 21b; 20b and 21b, respectively, and when one Hall IC 22 fails, the other Hall IC 22 can detect.
  • first to fourth rotating yokes 15, 16, 18, 19, permanent magnet 17, first and second magnetic collecting yokes 20, 21 are made of synthetic resin and arranged at fixed positions.
  • An annular support projection 17a provided integrally with the permanent magnet 17 and projecting in the axial direction; and outer peripheral sides of the first and second magnetic flux collecting yokes 20 and 21; are insert-coupled to the sensor housing 30.
  • first and second magnetic flux collecting yokes 20, 21 and the magnetic flux collecting portions 20b, 21b of the magnetic flux collecting yokes 20, 21; Hall ICs 22 provided between the magnetic flux collecting portions 20b, 21b; 8 are assembled to an arc-shaped third holder 31 made of synthetic resin, as shown in FIG. 8, and the first and second magnetic flux collecting yokes 20 and 21, the Hall IC 22.
  • the third holder 31 in the assembled state is molded and coupled to the sensor housing 30 when the sensor housing 30 is molded.
  • the sensor housing 30 is integrally formed with a connector portion 30a, and the terminals 32 are arranged in the connector portion 30a.
  • the sensor housing 30 is fixed to a vehicle body (not shown), and cylindrical third collars 37 are inserted and connected to a plurality of, for example, three portions of a flange portion 30a provided integrally with the sensor housing 30.
  • the sensor housing 30 is fixed to the vehicle body side by bolts (not shown) inserted through the third collars 37.
  • the sensor housing 30 to which the first and second magnetism collecting yokes 20 and 21 are insert-coupled includes the first and second ring portions 15a of the first and second rotating yokes 15 and 16 in the first shaft-side rotating yoke body 25.
  • the permanent magnet 17 is arranged between the first shaft 11 side so as to cover the torsion bar 13, the first shaft side rotating yoke body 25 and the second shaft side rotating yoke body 28. Eclipsed.
  • the first ring portion 15a and the plurality of first claw portions extending in the axial direction are provided at a plurality of positions spaced at equal intervals in the circumferential direction of the first ring portion 15a.
  • the first rotating yoke 15 having 15b, 15b...,
  • the second ring portion 16a formed in a larger diameter than the first ring portion 15a and coaxially surrounding the first ring portion 15a and the circumferential direction of the second ring portion 16a
  • Second rotation having a plurality of second claw portions 16b, 16b... Arranged in a plurality of positions at equal intervals and extending in the axial direction and disposed between the plurality of first claw portions 15b, 15b.
  • a ring-shaped permanent magnet 17 is fixed between the first and second ring portions 15a and 16a, with the yoke 16 fixed to the first shaft 11 and radially magnetized so that the inner and outer peripheral sides have different poles.
  • Fixedly placed on the second A plurality of third portions which are continuously provided at a plurality of locations at equal intervals in the circumferential direction of the ring portion 18a and the third ring portion 18a and which are opposed to the first and second claw portions 15b, 15b... 16b, 16b.
  • the third rotating yoke 18 having the claw portions 18b, 18b... A, and the fourth ring portion 19a that is formed to have the same diameter as the third ring portion 18a and is displaced from the third ring portion 18a in the axial direction.
  • the third claw portion 18b is connected to a plurality of locations at equal intervals in the circumferential direction of the fourth ring portion 19a and is opposed to the first and second claw portions 15b, 15b... 16b, 16b.
  • a fourth rotating yoke 19 having a plurality of fourth claw portions 19b, 19b,... Disposed between 18b... Is fixed to the second shaft 12, and faces the third and fourth ring portions 18a, 19a, respectively.
  • Fixed position Hall IC 22 ... are provided between the first and second magnetic flux collecting yokes 20 and 21 are arranged.
  • the first claw portion 15b of the first rotating yoke 15 with the first ring portion 15a opposed to the N pole has many portions that overlap the fourth claw portion 19b of the fourth rotating yoke 19 in the radial direction.
  • the second claw portion 16b of the second rotating yoke 16 with the second ring portion 16a facing the other of the N pole and the S pole (in this embodiment, the S pole) of the permanent magnet 17 is the third rotating yoke 18. There are many portions that overlap the third claw portions 18b in the radial direction.
  • the first claw portion 15b of the first rotary yoke 15 and the second claw portion 16b of the second rotary yoke 16, the third claw portion 18b of the third rotary yoke 18, and the fourth rotary yoke 19 are formed. Change in the circumferential relative position with respect to the fourth claw portions 19b... Changes in the magnetic flux between the first and second magnetic flux collecting yokes 20 and 21, thereby causing the first shaft 11 and the first A twist between the two shafts 12 is detected.
  • the ring-shaped permanent magnet 17 is magnetized in the radial direction, the magnetizing cost can be reduced, and the influence of the magnetic force variation between the magnetic poles can be reduced.
  • the sensor housing 30 made of synthetic resin, which is disposed at a fixed position so as to cover the first to fourth rotating yokes 15, 16, 18, 19, the permanent magnet 17, and the first and second magnetic collecting yokes 20, 21, is permanently attached. Since the magnet 17 and the first and second magnetic collecting yokes 20 and 21 are insert-coupled, when adjusting the variation in magnetic force by changing the sensor setting (e.g. neutral position output), the permanent magnet 17 and the Hall IC 22. Since the sensor output can be adjusted only by the torque sensor with the built-in motor, it is possible to reduce the number of assembling steps to the intermediate portion of the steering shaft in the electric power steering apparatus.
  • the sensor setting e.g. neutral position output
  • first and second rotating yokes 15 and 16 a first holder 24 made of synthetic resin in which a part of the first and second rotating yokes 15 and 16 are insert-bonded, and a first collar 23 are provided.
  • a shaft-side rotating yoke body 25 is fixed to the first shaft 11, and the third and fourth rotating yokes 18, 19 and a part of the third and fourth rotating yokes 18, 19 are insert-bonded and made of synthetic resin. Since the second shaft-side rotary yoke body 28 including the two holders 27 and the second collar 27 is fixed to the second shaft 12, the first shaft-side rotary yoke body 25 and the second shaft-side rotary yoke body 28 are preliminarily attached.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Steering Mechanism (AREA)

Abstract

In the provided torque sensor, a ring-shaped permanent magnet (17), the inner surface and outer surface of which are of different polarity from each other, is fixed in place between a first ring section (15a) of a first rotating yoke (15) and a second ring section (16a) of a second rotating yoke (16) affixed to a first shaft (11). A third prong (18b) on a third rotating yoke (18) and a fourth prong (19b) on a fourth rotating yoke (19) affixed to a second shaft (12) are disposed opposite a first and second prong (15b, 16b) on the first and second rotating yokes (15, 16). A magnetic detection element (22) is provided between first and second magnetic-flux-collecting yokes (20, 21) fixed in place corresponding respectively to third and fourth ring sections (18a, 19a) of third and fourth rotating yokes (18, 19). This configuration reduces the cost of magnetizing the torque sensor and reduces the impact of variations in magnetic force between magnetic poles.

Description

トルクセンサTorque sensor

　本発明は、トーションバーを介して同軸に連結される第１軸および第２軸間の捩れを検出するトルクセンサに関する。 The present invention relates to a torque sensor that detects torsion between a first shaft and a second shaft that are coaxially connected via a torsion bar.

　トーションバーで第２軸に連結される第１軸側にリング状である多極の永久磁石が固定され、永久磁石に対向する爪部をそれぞれ有する一対の回転ヨークが第２軸側に固定されるようにしたトルクセンサが特許文献１で知られている。 A ring-shaped multipolar permanent magnet is fixed to the first shaft connected to the second shaft by a torsion bar, and a pair of rotating yokes each having a claw portion facing the permanent magnet are fixed to the second shaft. A torque sensor configured as described above is known from Patent Document 1.

日本特開２００８－１８０５１７号公報Japanese Unexamined Patent Publication No. 2008-180517

　ところが、上記特許文献１で開示されたものでは、多極の永久磁石を用いるので、着磁コストの増大を招くだけでなく、磁極間の磁力ばらつきの影響が大きくなる。 However, since the multi-pole permanent magnet is used in the one disclosed in Patent Document 1, not only the magnetization cost is increased, but also the influence of the magnetic force variation between the magnetic poles is increased.

　本発明は、かかる事情に鑑みてなされたものであり、着磁コストを小さくし、磁極間の磁力ばらつきの影響も小さく抑え得るようにしたトルクセンサを提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a torque sensor capable of reducing the magnetization cost and suppressing the influence of magnetic force variation between magnetic poles.

　上記目的を達成するために、本発明は、トーションバーを介して同軸に連結される第１軸および第２軸間の捩れを検出するトルクセンサであって、第１リング部ならびに第１リング部の周方向に等間隔をあけた複数箇所に連設されて軸方向に延びる複数個の第１爪部を有して第１軸に固定される第１回転ヨークと、第１リング部よりも大径に形成されて第１リング部を同軸に囲繞する第２リング部ならびに第２リング部の周方向に等間隔をあけた複数箇所に連設されて軸方向に延びるとともに複数個の第１爪部間に配置される複数個の第２爪部を有して第１軸に固定される第２回転ヨークと、内周側および外周側が相互に異なる極となるように径方向に着磁されて第１および第２リング部間に固定配置されるリング状の永久磁石と、第３リング部ならびに第３リング部の周方向に等間隔をあけた複数箇所に連設されるとともに第１および第２爪部に対向する複数個の第３爪部を有して第２軸に固定される第３回転ヨークと、第３リング部と同径に形成されるとともに第２軸の軸方向で第３リング部からずれた位置に配置される第４リング部ならびに第４リング部の周方向等間隔をあけた複数箇所に連設されるとともに第１および第２爪部に対向するようにして第３爪部間に配置される複数個の第４爪部を有して第２軸に固定される第４回転ヨークと、第３および第４リング部にそれぞれ対向して固定位置に配置される第１および第２集磁ヨークと、第１および第２集磁ヨーク間に設けられる磁気検出素子とを備えることを第１の特徴とする。 In order to achieve the above object, the present invention provides a torque sensor that detects torsion between a first shaft and a second shaft that are coaxially connected via a torsion bar, and includes a first ring portion and a first ring portion. A first rotating yoke that has a plurality of first claw portions that extend in the axial direction and are connected to a plurality of locations at equal intervals in the circumferential direction, and is fixed to the first shaft; A second ring portion that is formed in a large diameter and coaxially surrounds the first ring portion, and a plurality of first rings that extend in the axial direction and are connected to a plurality of locations at equal intervals in the circumferential direction of the second ring portion. A second rotating yoke having a plurality of second claw portions disposed between the claw portions and fixed to the first shaft, and radially magnetized so that the inner peripheral side and the outer peripheral side have different poles from each other A ring-shaped permanent magnet fixedly disposed between the first and second ring portions; And a plurality of third claw portions that are connected to a plurality of locations at equal intervals in the circumferential direction of the first ring portion and the third ring portion, and are fixed to the second shaft with a plurality of third claw portions facing the first and second claw portions. The third rotating yoke, the fourth ring part formed around the same diameter as the third ring part, and arranged at a position displaced from the third ring part in the axial direction of the second axis, and the circumference of the fourth ring part A second shaft having a plurality of fourth claw portions arranged between a plurality of third claw portions so as to face the first and second claw portions while being continuously provided at a plurality of positions spaced at equal intervals in the direction. Provided between the first and second magnetism collecting yokes, the first and second magnetism collecting yokes arranged at fixed positions facing the third and fourth ring portions, respectively. A first feature is that a magnetic detection element is provided.

　また本発明は、第１の特徴の構成に加えて、第１～第４回転ヨーク、前記永久磁石、第１および第２集磁ヨークを覆って固定位置に配置される合成樹脂製のセンサハウジングに、前記永久磁石および前記両集磁ヨークがインサート結合されることを第２の特徴とする。 In addition to the configuration of the first feature, the present invention provides a sensor housing made of synthetic resin that is disposed at a fixed position so as to cover the first to fourth rotating yokes, the permanent magnets, the first and second magnetic flux collecting yokes. Further, the second feature is that the permanent magnet and both the magnetic flux collecting yokes are insert-coupled.

　さらに本発明は、第１または第２の特徴の構成に加えて、第１および第２回転ヨークと、第１および第２回転ヨークの一部をインサート結合せしめた合成樹脂製の第１ホルダとを備える第１軸側回転ヨーク体が第１軸に固定され、第３および第４回転ヨークと、第３および第４回転ヨークの一部をインサート結合せしめた合成樹脂製の第２ホルダとを備える第２軸側回転ヨーク体が第２軸に固定されることを第３の特徴とする。 In addition to the first or second feature of the present invention, the first and second rotating yokes, and a first holder made of synthetic resin in which a part of the first and second rotating yokes are insert-coupled, A first shaft-side rotary yoke body fixed to the first shaft, and a third and fourth rotary yoke, and a second holder made of synthetic resin in which a part of the third and fourth rotary yokes are insert-bonded. A third feature is that the second shaft side rotary yoke body provided is fixed to the second shaft.

　なお実施の形態のホールＩＣ２２が本発明の磁気検出素子に対応する。 The Hall IC 22 of the embodiment corresponds to the magnetic detection element of the present invention.

　本発明の第１の特徴によれば、第１軸に固定される第１回転ヨークの第１リング部および第２回転ヨークの第２リング部間に、内周側および外周側が相互に異なる極であるリング状の永久磁石が固定配置されるので、第１および第２回転ヨークがそれぞれ有する第１および第２爪部は相互に異なる磁極となる。一方、第２軸に固定される第３回転ヨークの第３爪部および第４回転ヨークの第４爪部は、第１および第２爪部に対向しており、第３および第４回転ヨークの第３および第４リング部に個別に対応して固定配置される一対の集磁ヨーク間に磁気検出素子が設けられるので、第１軸および第２軸間で捩れが生じると、第１および第２爪部と、第３および第４爪部との間での周方向相対位置が変化して第１および第２集磁ヨーク間での磁束に変化が生じることによって第１軸および第２軸間の捩れが検出されることになる。しかもリング状の永久磁石が径方向に着磁されるものであるので、着磁コストを小さくすることができ、磁極間の磁力ばらつきの影響も小さく抑えることができる。 According to the first feature of the present invention, the inner circumferential side and the outer circumferential side are different from each other between the first ring portion of the first rotating yoke and the second ring portion of the second rotating yoke fixed to the first shaft. Since the ring-shaped permanent magnets are fixedly arranged, the first and second claw portions of the first and second rotary yokes have different magnetic poles. On the other hand, the third claw portion of the third rotating yoke fixed to the second shaft and the fourth claw portion of the fourth rotating yoke are opposed to the first and second claw portions, and the third and fourth rotating yokes. Since the magnetic detection element is provided between a pair of magnetism collecting yokes fixedly arranged corresponding to the third and fourth ring portions individually, if a twist occurs between the first axis and the second axis, The relative position in the circumferential direction between the second claw portion and the third and fourth claw portions changes to change the magnetic flux between the first and second magnetic flux collecting yokes. A twist between the shafts is detected. In addition, since the ring-shaped permanent magnet is magnetized in the radial direction, the magnetizing cost can be reduced, and the influence of the magnetic force variation between the magnetic poles can be reduced.

　また本発明の第２の特徴によれば、磁力のばらつきをセンサ設定（中立位置の出力など）の変更で調整する場合、永久磁石および磁気検出素子が内蔵されたトルクセンサだけでセンサ出力調整ができるので、電動パワーステアリング装置におけるステアリングシャフトの中間部等への組付け工数を少なくすることができる。 According to the second feature of the present invention, when adjusting the variation in magnetic force by changing the sensor setting (e.g., neutral position output), the sensor output can be adjusted only with a torque sensor incorporating a permanent magnet and a magnetic detection element. Therefore, it is possible to reduce the number of steps for assembling the intermediate portion of the steering shaft in the electric power steering apparatus.

　さらに本発明の第３の特徴によれば、第１および第２回転ヨークと、第１および第２回転ヨークの一部をインサート結合せしめた合成樹脂製の第１ホルダとを備える第１軸側回転ヨーク体と、第３および第４回転ヨークと、第３および第４回転ヨークの一部をインサート結合せしめた合成樹脂製の第２ホルダとを備える第２軸側回転ヨーク体とを予め組み立てておくことで、第１および第２回転ヨークの第１軸への組付け工数ならびに第３および第４回転ヨークの第２軸への組付け工数を低減して組付け作業効率を高めることができる。 Further, according to the third feature of the present invention, the first shaft side including the first and second rotating yokes and the first holder made of synthetic resin in which a part of the first and second rotating yokes are insert-bonded. Assembling in advance a rotary yoke body including a rotary yoke body, third and fourth rotary yokes, and a second holder made of synthetic resin in which a part of the third and fourth rotary yokes are insert-bonded. By reducing the number of man-hours for assembling the first and second rotating yokes on the first shaft and the man-hours for assembling the third and fourth rotating yokes on the second shaft, the assembling work efficiency can be increased. it can.

図１はトルクセンサの縦断面図である。（第１実施例）FIG. 1 is a longitudinal sectional view of the torque sensor. (First embodiment) 図２はトルクセンサの分解縦断面図である。（第１実施例）FIG. 2 is an exploded vertical sectional view of the torque sensor. (First embodiment) 図３は第１回転ヨーク、第２回転ヨーク、永久磁石、第３回転ヨーク、第４回転ヨーク、第１集磁ヨークおよび第２集磁ヨークの分解斜視図である。（第１実施例）FIG. 3 is an exploded perspective view of the first rotating yoke, the second rotating yoke, the permanent magnet, the third rotating yoke, the fourth rotating yoke, the first magnetic collecting yoke, and the second magnetic collecting yoke. (First embodiment) 図４は第１軸に固定された第１軸側回転ヨーク体ならびに第２軸に固定された第２軸側回転ヨーク体の斜視図である。（第１実施例）FIG. 4 is a perspective view of the first shaft-side rotating yoke body fixed to the first shaft and the second shaft-side rotating yoke body fixed to the second shaft. (First embodiment) 図５は第１軸側回転ヨーク体の斜視図である。（第１実施例）FIG. 5 is a perspective view of the first shaft-side rotating yoke body. (First embodiment) 図６は図５の６矢視図である。（第１実施例）FIG. 6 is a view taken in the direction of arrow 6 in FIG. (First embodiment) 図７はトーションバーを省略した状態での図２の７－７線拡大断面図である。（第１実施例）FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG. 2 in a state where the torsion bar is omitted. (First embodiment) 図８は第１集磁ヨーク、第２集磁ヨーク、ホールＩＣ、第３ホルダおよび端子の分解斜視図である。（第１実施例）FIG. 8 is an exploded perspective view of the first magnetism collecting yoke, the second magnetism collecting yoke, the Hall IC, the third holder, and the terminals. (First embodiment) 図９はトルクセンサの全体斜視図である。（第１実施例）FIG. 9 is an overall perspective view of the torque sensor. (First embodiment) 図１０は第１～第４爪部の相対位置変化を示す図である。（第１実施例）FIG. 10 is a diagram showing changes in the relative positions of the first to fourth claw portions. (First embodiment)

１１・・・第１軸
１２・・・第２軸
１３・・・トーションバー
１５・・・第１回転ヨーク
１５ａ・・・第１リング部
１５ｂ・・・第１爪部
１６・・・第２回転ヨーク
１６ａ・・・第２リング部
１６ｂ・・・第２爪部
１７・・・永久磁石
１８・・・第３回転ヨーク
１８ａ・・・第３リング部
１８ｂ・・・第３爪部
１９・・・第４回転ヨーク
１９ａ・・・第４リング部
１９ｂ・・・第４爪部
２０・・・第１集磁ヨーク
２１・・・第２集磁ヨーク
２２・・・磁気検出素子であるホールＩＣ
２４・・・第１ホルダ
２５・・・第１軸側回転ヨーク体
２７・・・第２ホルダ
２８・・・第２軸側回転ヨーク体
３０・・・センサハウジング DESCRIPTION OF SYMBOLS 11 ... 1st axis | shaft 12 ... 2nd axis | shaft 13 ... Torsion bar 15 ... 1st rotation yoke 15a ... 1st ring part 15b ... 1st nail | claw part 16 ... 2nd Rotating yoke 16a ... second ring portion 16b ... second claw portion 17 ... permanent magnet 18 ... third rotating yoke 18a ... third ring portion 18b ... third claw portion 19 .. 4th rotating yoke 19a ... 4th ring part 19b ... 4th claw part 20 ... 1st magnetism collecting yoke 21 ... 2nd magnetism collecting yoke 22 ... hole which is a magnetic detection element IC
24 ... 1st holder 25 ... 1st axis | shaft side rotation yoke body 27 ... 2nd holder 28 ... 2nd axis | shaft side rotation yoke body 30 ... Sensor housing

　以下、本発明の実施の形態について、添付の図１～図１０を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the attached FIG. 1 to FIG.

先ず図１および図２において、電動パワーステアリング装置においてステアリングシャフトの中間部には、トーションバー１３で連結される第１軸１１および第２軸１２間の捩れを検出するようにして本発明に従って構成されるトルクセンサが介設される。 First, referring to FIGS. 1 and 2, in the electric power steering apparatus, the intermediate portion of the steering shaft is configured in accordance with the present invention so as to detect the twist between the first shaft 11 and the second shaft 12 connected by the torsion bar 13. A torque sensor is provided.

　このトルクセンサは、第１リング部１５ａおよび第２リング部１６ａをそれぞれ有して第１軸１１に固定される第１および第２回転ヨーク１５，１６と、第１および第２リング部１５ａ，１６ａ間に固定配置されるリング状の永久磁石１７と、第３リング部１８ａおよび第４リング部１９ａをそれぞれ有して第２軸１２に固定される第３および第４回転ヨーク１８，１９と、第３および第４リング部１８ａ，１９ａにそれぞれ対向して固定位置に配置される一対の集磁ヨーク２０，２１と、両集磁ヨーク２０，２１間に設けられる磁気検出素子であるホールＩＣ２２…とを備える。 The torque sensor includes a first ring portion 15a and a second ring portion 16a, and first and second rotary yokes 15 and 16 fixed to the first shaft 11, and first and second ring portions 15a and 15a. A ring-shaped permanent magnet 17 fixedly disposed between 16a, and third and fourth rotating yokes 18, 19 having a third ring portion 18a and a fourth ring portion 19a, respectively, and fixed to the second shaft 12. , A pair of magnetic flux collecting yokes 20 and 21 disposed at fixed positions facing the third and fourth ring portions 18a and 19a, respectively, and a Hall IC 22 which is a magnetic detection element provided between the magnetic flux collecting yokes 20 and 21. … And.

　図３および図４において、第１回転ヨーク１５は、第１リング部１５ａと、第１リング部１５ａの周方向に等間隔をあけた複数箇所たとえば６箇所に連設されて軸方向に延びる複数個たとえば６個の第１爪部１５ｂ，１５ｂ…とを一体に有し、第２回転ヨーク１６は、第１リング部１５ａよりも大径に形成されて第１リング部１５ａを同軸に囲繞する第２リング部１６ａと、第２リング部１６ａの周方向に等間隔をあけた複数箇所たとえば６箇所に連設されて軸方向に延びる複数個たとえば６個の第２爪部１６ｂ，１６ｂ…とを一体に有するものであり、第１爪部１５ｂ，１５ｂ…および第２爪部１６ｂ，１６ｂ…は、それらの爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…が第１軸１１の軸線を中心とする同一仮想円に外面を沿わせつつ周方向交互に配置されるように形成される。 3 and 4, the first rotating yoke 15 includes a first ring portion 15a and a plurality of portions extending in the axial direction, for example, six portions that are provided at equal intervals in the circumferential direction of the first ring portion 15a. .., And six first claw portions 15b, 15b,... Are integrally formed, and the second rotary yoke 16 is formed with a diameter larger than that of the first ring portion 15a and coaxially surrounds the first ring portion 15a. The second ring portion 16a, and a plurality of, for example, six second claw portions 16b, 16b,... Extending in the axial direction and continuously provided at a plurality of locations, for example, six locations, spaced at equal intervals in the circumferential direction of the second ring portion 16a. The first claw portions 15b, 15b ... and the second claw portions 16b, 16b ... have their claw portions 15b, 15b ...; 16b, 16b ... centered on the axis of the first shaft 11. Around the same virtual circle It is formed so as to be arranged alternately.

　図５～図７を併せて参照して、第１および第２回転ヨーク１５，１６と、第１軸１１に圧入等で固定される円筒状の第１カラー２３と、第１回転ヨーク１５、第２回転ヨーク１６および第１カラー２３の一部をインサート結合せしめた合成樹脂製の第１ホルダ２４とは、第１軸側回転ヨーク体２５を構成する。 Referring to FIGS. 5 to 7 together, the first and second rotary yokes 15 and 16, the cylindrical first collar 23 fixed to the first shaft 11 by press-fitting or the like, the first rotary yoke 15, The first holder 24 made of synthetic resin in which a part of the second rotating yoke 16 and the first collar 23 are insert-coupled constitutes a first shaft-side rotating yoke body 25.

　第１ホルダ２４は、第１カラー２３の下部外周を覆うとともに第１カラー２３の下方に間隔をあけて配置される第１回転ヨーク１５の第１リング部１５ａおよび第１カラー２３を連結する第１環状部２４ａと、第１リング部１５ａの外面の周方向に等間隔をあけた複数箇所たとえば３箇所に設けられて軸方向に延びる溝３６…を埋めるようにして第１環状部２４ａから下方に延びる複数個たとえば３個の連結部２４ｂ…と、第２回転ヨーク１６における第２リング部１６ａおよび第１リング部１５ａの下部間にわたって平板状に形成されるとともに前記連結部２４ｂ…の下部に連なる平板部２４ｃと、第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…間を埋めるとともに第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…の内方側で円筒状に延びて前記平板部２４ｃの外周に連なる第１円筒部２４ｄとを一体に有する。而して第１ホルダ２４で保持された状態で、第１回転ヨーク１５における第１リング部１５ａの外周のうち前記連結部２４ｂ…を除く部分は第２回転ヨーク１６の第２リング部１６ａ側に露出して臨み、第２回転ヨーク１６における第２リング部１６ａの内周全周は、第１リング部１５ａ側に露出して臨み、第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…の外面は、第１軸１１の軸線を中心とする同一仮想円に沿うようにして外方に臨むことになる。 The first holder 24 covers the lower outer periphery of the first collar 23 and connects the first ring portion 15 a of the first rotating yoke 15 and the first collar 23 that are disposed below the first collar 23 with a space therebetween. Downward from the first annular portion 24a so as to fill the axially extending grooves 36 provided at a plurality of, for example, three locations, spaced at equal intervals in the circumferential direction of the outer surface of the first ring portion 15a. And a plurality of, for example, three connecting portions 24b extending to the lower portion of the second rotating yoke 16 and the lower portions of the second ring portion 16a and the first ring portion 15a. The space between the continuous flat plate portion 24c and the first and second claw portions 15b, 15b ...; 16b, 16b ... and the first and second claw portions 15b, 15b ...; 16b, 16b ... In rectangular side extending cylindrically integrally has a first cylindrical portion 24d continuing to the outer periphery of said plate 24c. Thus, the portion of the outer periphery of the first ring portion 15a of the first rotating yoke 15 excluding the connecting portion 24b ... while being held by the first holder 24 is the second ring portion 16a side of the second rotating yoke 16. The first and second claw portions 15b, 15b,... 16b, 16b are exposed to the first ring portion 15a and the entire inner circumference of the second ring portion 16a of the second rotary yoke 16 is exposed. The outer surface of... Faces outward along the same virtual circle centered on the axis of the first shaft 11.

　前記永久磁石１７は、内周側および外周側が相互に異なる極となるように径方向に着磁されてリング状に形成され、第１および第２リング部１５ａ，１６ａ間に固定配置されるものであり、第１回転ヨーク１５における第１リング部１５ａの外周に対向する永久磁石１７の内周がたとえばＮ極に着磁されるのに対し、第２回転ヨーク１６における第２リング部１６ａの内周に対向する永久磁石１７の外周がたとえばＳ極に着磁される。 The permanent magnet 17 is formed in a ring shape by being magnetized in the radial direction so that the inner peripheral side and the outer peripheral side are different from each other, and is fixedly disposed between the first and second ring portions 15a, 16a. The inner periphery of the permanent magnet 17 facing the outer periphery of the first ring portion 15a in the first rotating yoke 15 is magnetized, for example, to the N pole, whereas the second ring portion 16a in the second rotating yoke 16 is The outer periphery of the permanent magnet 17 facing the inner periphery is magnetized, for example, to an S pole.

　第３回転ヨーク１８は、第３リング部１８ａと、第３リング部１８ａの周方向に等間隔をあけた複数箇所たとえば６箇所に連設される複数個たとえば６個の第３爪部１８ｂ，１８ｂ…とを一体に有し、第４回転ヨーク１９は、第４リング部１９ａと、第４リング部１９ａの周方向に等間隔をあけた複数箇所たとえば６箇所に連設される複数個たとえば６個の第４爪部１９ｂ，１９ｂ…を一体に有するものである。而して第３リング部１８ａおよび第４リング部１９ａは、同径に形成されるとともに第２軸の軸方向で相互にずれた位置に配置され、第３爪部１８ｂ，１８ｂ…および第４爪部１９ｂ，１９ｂ…は、それらの爪部１８ｂ，１８ｂ…；１９ｂ，１９ｂ…が周方向交互に配置されるようにして軸方向に延びるように形成され、第３および第４回転ヨーク１８，１９は、第３および第４爪部１８ｂ，１８ｂ…；１９ｂ，１９ｂ…を、それらの内面が第２軸１２の軸線を中心とする同一仮想円に沿うようにしつつ第１および第２回転ヨーク１５，１６の第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…に半径方向外方から対向するように配置される。 The third rotating yoke 18 includes a third ring portion 18a and a plurality of, for example, six third claw portions 18b provided continuously at a plurality of locations, for example, six locations at equal intervals in the circumferential direction of the third ring portion 18a. 18b ..., and the fourth rotating yoke 19 includes a fourth ring portion 19a and a plurality of, for example, a plurality of, for example, six portions provided at equal intervals in the circumferential direction of the fourth ring portion 19a. It has six 4th nail | claw parts 19b, 19b ... integrally. Thus, the third ring portion 18a and the fourth ring portion 19a are formed to have the same diameter and are disposed at positions shifted from each other in the axial direction of the second axis, and the third claw portions 18b, 18b,. The claw portions 19b, 19b... Are formed so as to extend in the axial direction so that the claw portions 18b, 18b... 19b, 19b. The first and second rotating yokes 19 have the third and fourth claw portions 18b, 18b... 19b, 19b... With their inner surfaces along the same virtual circle centered on the axis of the second shaft 12. The first and second claw portions 15b, 15b ...; 16b, 16b ... are arranged so as to face the outer sides in the radial direction.

　また第３および第４回転ヨーク１８，１９と、第２軸１２に圧入等で固定される円筒状の第２カラー２６と、第３回転ヨーク１８、第４回転ヨーク１９および第２カラー２６の一部をインサート結合せしめた合成樹脂製の第２ホルダ２７とは、第２軸側回転ヨーク体２８を構成する。 Further, the third and fourth rotating yokes 18 and 19, the cylindrical second collar 26 fixed to the second shaft 12 by press-fitting or the like, the third rotating yoke 18, the fourth rotating yoke 19, and the second collar 26. The second holder 27 made of synthetic resin, part of which is insert-bonded, constitutes a second shaft-side rotary yoke body 28.

　第２ホルダ２７は、第２カラー２６の上部外周を覆うとともに第２カラー２６の上方に間隔をあけて配置される第４回転ヨーク１９の第４リング部１９ａおよび第２カラー２６を連結する第２環状部２７ａと、第２カラー２６の上部軸方向に相互に離れた位置にある第３および第４リング部１８ａ，１９ａを相互に連結するとともに第３および第４爪部１８ｂ，１８ｂ…；１９ｂ，１９ｂ…間を埋めるようにして第２環状部２７ａの上部に連なる第２円筒部２７ｂとを一体に有するものであり、第２ホルダ２７に保持された状態で第３および第４回転ヨーク１８，１９における第３および第４爪部１８ｂ，１８ｂ…；１９ｂ，１９ｂ…の内面は、第２ホルダ２７における第２円筒部２７ｂの内周面に面一に臨むことになる。 The second holder 27 covers the upper outer periphery of the second collar 26 and connects the fourth ring portion 19 a of the fourth rotating yoke 19 and the second collar 26 disposed above the second collar 26 with a space therebetween. The second annular portion 27a and the third and fourth ring portions 18a, 19a located at positions separated from each other in the upper axial direction of the second collar 26 are connected to each other and the third and fourth claw portions 18b, 18b,. 19b, 19b... Are integrally provided with a second cylindrical portion 27b connected to the upper portion of the second annular portion 27a so as to fill the space, and are held by the second holder 27 so that the third and fourth rotating yokes are provided. The inner surfaces of the third and fourth claw portions 18b, 18b... 19b, 19b... At 18 and 19 are flush with the inner peripheral surface of the second cylindrical portion 27b of the second holder 27.

　図８を併せて参照して、第１および第２集磁ヨーク２０，２１は、第２軸１２の軸線を中心とした円弧状に形成される円弧部２０ａ，２１ａと、円弧部２０ａ，２１ａの周方向中央部から半径方向外方に突出する集磁部２０ｂ，２０ｂ；２１ｂ，２１ｂとをそれぞれ一体に有して同一形状に形成されるものであり、円弧部２０ａの内周を第３回転ヨーク１８における第３リング部１８ａの外周に対向させるとともに円弧部２１ａの内周を第４回転ヨーク１９における第４リング部１９ａの外周に対向させるように配置され、両集磁部２０ｂ，２１ｂ；２０ｂ，２１ｂ間にホールＩＣ２２，２２が設けられる。 Referring also to FIG. 8, the first and second magnetic collecting yokes 20, 21 are arc portions 20 a, 21 a formed in an arc shape centering on the axis of the second shaft 12, and arc portions 20 a, 21 a. The magnetic flux collecting portions 20b, 20b; 21b, 21b projecting outward in the radial direction from the central portion in the circumferential direction are integrally formed, and are formed in the same shape. The rotating yoke 18 is arranged so as to oppose the outer periphery of the third ring portion 18a and the inner periphery of the arc portion 21a is arranged to oppose the outer periphery of the fourth ring portion 19a in the fourth rotating yoke 19, and both the magnetism collecting portions 20b, 21b. ; Hall ICs 22 and 22 are provided between 20b and 21b.

　しかも第１および第２集磁ヨーク２０，２１における円弧部２０ａ，２１ａの周方向に間隔をあけた２箇所に前記集磁部２０ｂ，２０ｂ；２１ｂ，２１ｂが突設され、対をなす２組の集磁部２０ｂ，２１ｂ；２０ｂ，２１ｂ間に前記ホールＩＣ２２，２２がそれぞれ設けられており、一方のホールＩＣ２２の故障時に他方のホールＩＣ２２による検出が可能となる。 Moreover, the magnetism collecting portions 20b, 20b; 21b, 21b are projected at two locations spaced apart in the circumferential direction of the arc portions 20a, 21a in the first and second magnetism collecting yokes 20, 21, and two pairs forming a pair The Hall ICs 22 and 22 are provided between the magnetism collecting portions 20b and 21b; 20b and 21b, respectively, and when one Hall IC 22 fails, the other Hall IC 22 can detect.

　図９を併せて参照して、第１～第４回転ヨーク１５，１６，１８，１９、永久磁石１７、第１および第２集磁ヨーク２０，２１は、合成樹脂から成るとともに固定位置に配置されるセンサハウジング３０で覆われるものであり、前記永久磁石１７に一体に設けられて軸方向に突出する環状の支持突部１７ａと、第１および第２集磁ヨーク２０，２１の外周側とがセンサハウジング３０にインサート結合される。 Referring also to FIG. 9, first to fourth rotating yokes 15, 16, 18, 19, permanent magnet 17, first and second magnetic collecting yokes 20, 21 are made of synthetic resin and arranged at fixed positions. An annular support projection 17a provided integrally with the permanent magnet 17 and projecting in the axial direction; and outer peripheral sides of the first and second magnetic flux collecting yokes 20 and 21; Are insert-coupled to the sensor housing 30.

　しかも第１および第２集磁ヨーク２０，２１と、それらの集磁ヨーク２０，２１の集磁部２０ｂ，２１ｂ；２０ｂ，２１ｂ間に設けられるホールＩＣ２２…と、それらのホールＩＣ２２…に連なる複数の端子３２…とは、図８で示すように、合成樹脂から成る円弧状の第３ホルダ３１に組付けられており、第１および第２集磁ヨーク２０，２１、ホールＩＣ２２…および端子３２…が組付けられた状態にある第３ホルダ３１がセンサハウジング３０の型成形時にセンサハウジング３０にモールド結合される。このセンサハウジング３０にはコネクタ部３０ａが一体に形成されており、前記端子３２…が前記コネクタ部３０ａ内に配置される。 Moreover, the first and second magnetic flux collecting yokes 20, 21 and the magnetic flux collecting portions 20b, 21b of the magnetic flux collecting yokes 20, 21; Hall ICs 22 provided between the magnetic flux collecting portions 20b, 21b; 8 are assembled to an arc-shaped third holder 31 made of synthetic resin, as shown in FIG. 8, and the first and second magnetic flux collecting yokes 20 and 21, the Hall IC 22. The third holder 31 in the assembled state is molded and coupled to the sensor housing 30 when the sensor housing 30 is molded. The sensor housing 30 is integrally formed with a connector portion 30a, and the terminals 32 are arranged in the connector portion 30a.

　前記センサハウジング３０は、図示しない車体側に固定されるものであり、センサハウジング３０に一体に設けられるフランジ部３０ａの複数箇所たとえば３箇所に円筒状の第３カラー３７…がインサート結合され、それらの第３カラー３７…に挿通されるボルト（図示せず）によってセンサハウジング３０が前記車体側に固定される。 The sensor housing 30 is fixed to a vehicle body (not shown), and cylindrical third collars 37 are inserted and connected to a plurality of, for example, three portions of a flange portion 30a provided integrally with the sensor housing 30. The sensor housing 30 is fixed to the vehicle body side by bolts (not shown) inserted through the third collars 37.

　また前記センサハウジング３０と、第１軸１１との間には、ボールベアリング３３と、該ボールベアリング３３よりも外方に配置されるダストシール３４とが介装されるものであり、第１軸１１に第１軸側回転ヨーク体２５が固定され、第１軸１１にトーションバー１３を介して連結された第２軸１２に第２軸側回転ヨーク体２８が固定された状態で、永久磁石１７、第１および第２集磁ヨーク２０，２１がインサート結合されたセンサハウジング３０は、第１軸側回転ヨーク体２５における第１および第２回転ヨーク１５，１６の第１および第２リング部１５ａ，１６ａ間に永久磁石１７が配置されるようにしつつ、前記トーションバー１３、第１軸側回転ヨーク体２５および第２軸側回転ヨーク体２８を覆うように第１軸１１側から組付けられる。 Further, a ball bearing 33 and a dust seal 34 disposed outside the ball bearing 33 are interposed between the sensor housing 30 and the first shaft 11. The first shaft side rotary yoke body 25 is fixed to the first shaft 11, and the second shaft side rotary yoke body 28 is fixed to the second shaft 12 connected to the first shaft 11 via the torsion bar 13. The sensor housing 30 to which the first and second magnetism collecting yokes 20 and 21 are insert-coupled includes the first and second ring portions 15a of the first and second rotating yokes 15 and 16 in the first shaft-side rotating yoke body 25. 16a, the permanent magnet 17 is arranged between the first shaft 11 side so as to cover the torsion bar 13, the first shaft side rotating yoke body 25 and the second shaft side rotating yoke body 28. Eclipsed.

　次にこの実施の形態の作用について説明すると、第１リング部１５ａならびに第１リング部１５ａの周方向に等間隔をあけた複数箇所に連設されて軸方向に延びる複数個の第１爪部１５ｂ，１５ｂ…を有する第１回転ヨーク１５と、第１リング部１５ａよりも大径に形成されて第１リング部１５ａを同軸に囲繞する第２リング部１６ａならびに第２リング部１６ａの周方向に等間隔をあけた複数箇所に連設されて軸方向に延びるとともに複数個の第１爪部１５ｂ，１５ｂ…間に配置される複数個の第２爪部１６ｂ，１６ｂ…を有する第２回転ヨーク１６が第１軸１１に固定され、内周側および外周側が相互に異なる極となるように径方向に着磁されるリング状の永久磁石１７が第１および第２リング部１５ａ，１６ａ間に固定配置され、第３リング部１８ａならびに第３リング部１８ａの周方向に等間隔をあけた複数箇所に連設されるとともに第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…に対向する複数個の第３爪部１８ｂ，１８ｂ…ａを有する第３回転ヨーク１８と、第３リング部１８ａと同径に形成されるとともに軸方向で第３リング部１８ａからずれた位置に配置される第４リング部１９ａならびに第４リング部１９ａの周方向等間隔をあけた複数箇所に連設されるとともに第１および第２爪部１５ｂ，１５ｂ…；１６ｂ，１６ｂ…に対向するようにして第３爪部１８ｂ，１８ｂ…間に配置される複数個の第４爪部１９ｂ，１９ｂ…を有する第４回転ヨーク１９とが第２軸１２に固定され、第３および第４リング部１８ａ，１９ａにそれぞれ対向して固定位置に配置される第１および第２集磁ヨーク２０，２１間にホールＩＣ２２…が設けられる。 Next, the operation of this embodiment will be described. The first ring portion 15a and the plurality of first claw portions extending in the axial direction are provided at a plurality of positions spaced at equal intervals in the circumferential direction of the first ring portion 15a. The first rotating yoke 15 having 15b, 15b..., The second ring portion 16a formed in a larger diameter than the first ring portion 15a and coaxially surrounding the first ring portion 15a and the circumferential direction of the second ring portion 16a Second rotation having a plurality of second claw portions 16b, 16b... Arranged in a plurality of positions at equal intervals and extending in the axial direction and disposed between the plurality of first claw portions 15b, 15b. A ring-shaped permanent magnet 17 is fixed between the first and second ring portions 15a and 16a, with the yoke 16 fixed to the first shaft 11 and radially magnetized so that the inner and outer peripheral sides have different poles. Fixedly placed on the second A plurality of third portions which are continuously provided at a plurality of locations at equal intervals in the circumferential direction of the ring portion 18a and the third ring portion 18a and which are opposed to the first and second claw portions 15b, 15b... 16b, 16b. The third rotating yoke 18 having the claw portions 18b, 18b... A, and the fourth ring portion 19a that is formed to have the same diameter as the third ring portion 18a and is displaced from the third ring portion 18a in the axial direction. In addition, the third claw portion 18b is connected to a plurality of locations at equal intervals in the circumferential direction of the fourth ring portion 19a and is opposed to the first and second claw portions 15b, 15b... 16b, 16b. A fourth rotating yoke 19 having a plurality of fourth claw portions 19b, 19b,... Disposed between 18b... Is fixed to the second shaft 12, and faces the third and fourth ring portions 18a, 19a, respectively. Fixed position Hall IC 22 ... are provided between the first and second magnetic flux collecting yokes 20 and 21 are arranged.

　このようなトルクセンサ１４では、第１軸１１および第２軸１２間に捩れがない状態では、図１０（ａ）で示すように、第１爪部１５ｂ…および第２爪部１６ｂ…が、第３および第４爪部１８ｂ…，１９ｂ…間に対応した中立状態にある。この中立状態から第１軸１１が一方向（図１０の矢印３８で示す方向）に回動したときには、図１０（ｂ）で示すように、永久磁石１７におけるＮ極およびＳ極の一方（この実施の形態ではＮ極）に第１リング部１５ａを対向させた第１回転ヨーク１５の第１爪部１５ｂ…が第４回転ヨーク１９の第４爪部１９ｂ…に半径方向で重なる部分が多くなり、永久磁石１７におけるＮ極およびＳ極の他方（この実施の形態ではＳ極）に第２リング部１６ａを対向させた第２回転ヨーク１６の第２爪部１６ｂ…が第３回転ヨーク１８の第３爪部１８ｂ…に半径方向で重なる部分が多くなる。この状態では、永久磁石１７のＮ極から第１回転ヨーク１５、第４回転ヨーク１９、第２集磁ヨーク２１の集磁部２１ｂ…、ホールＩＣ２２…、第１集磁ヨーク２０の集磁部２０ｂ、第３回転ヨーク１９、第２回転ヨーク１６を経て永久磁石１７のＳ極へと磁束が流れることになる。而して永久磁石１７の内周側のＮ極に第１リング部１５ａを対向させた第１回転ヨーク１５の第１爪部１５ｂ…と第４回転ヨーク１９の第４爪部１９ｂ…との半径方向重なり量ならびに永久磁石１７の外周側に第２リング部１６ａを対向させた第２回転ヨーク１６の第２爪部１６ｂ…と第３回転ヨーク１８の第３爪部１８ｂ…の半径方向重なり量、すなわち第２軸１２に対する第１軸１１の前記一方向へのねじり量が大きくなるにつれて磁束密度が大きくなる。 In such a torque sensor 14, in a state where there is no twist between the first shaft 11 and the second shaft 12, as shown in FIG. 10 (a), the first claw portion 15b ... and the second claw portion 16b ... It is in the neutral state corresponding to between 3rd and 4th nail | claw part 18b ..., 19b .... When the first shaft 11 rotates in one direction (the direction indicated by the arrow 38 in FIG. 10) from this neutral state, as shown in FIG. 10 (b), one of the N pole and the S pole in the permanent magnet 17 (this In the embodiment, the first claw portion 15b of the first rotating yoke 15 with the first ring portion 15a opposed to the N pole) has many portions that overlap the fourth claw portion 19b of the fourth rotating yoke 19 in the radial direction. The second claw portion 16b of the second rotating yoke 16 with the second ring portion 16a facing the other of the N pole and the S pole (in this embodiment, the S pole) of the permanent magnet 17 is the third rotating yoke 18. There are many portions that overlap the third claw portions 18b in the radial direction. In this state, from the north pole of the permanent magnet 17 to the first rotating yoke 15, the fourth rotating yoke 19, the magnetic collecting parts 21 b of the second magnetic collecting yoke 21, the Hall IC 22, and the magnetic collecting parts of the first magnetic collecting yoke 20. The magnetic flux flows to the south pole of the permanent magnet 17 through 20b, the third rotating yoke 19, and the second rotating yoke 16. Thus, the first claw portion 15b of the first rotary yoke 15 having the first ring portion 15a opposed to the N pole on the inner peripheral side of the permanent magnet 17 and the fourth claw portion 19b of the fourth rotary yoke 19 are provided. Radial overlap between the second claw portions 16b of the second rotating yoke 16 and the third claw portions 18b of the third rotating yoke 18 with the second ring portion 16a facing the outer circumferential side of the permanent magnet 17 As the amount, that is, the amount of twist of the first shaft 11 in the one direction relative to the second shaft 12 increases, the magnetic flux density increases.

　また上記中立状態から第１軸１１が他方向（図１０の矢印３９で示す方向）に回動したときには、図１０（ｃ）で示すように、第１回転ヨーク１５の第１爪部１５ｂ…が第３回転ヨーク１８の第３爪部１８ｂ…に半径方向で重なる部分が多くなり、第２回転ヨーク１６の第２爪部１６ｂ…が第４回転ヨーク１９の第４爪部１９ｂ…に半径方向で重なる部分が多くなる。この状態では、永久磁石１７のＮ極から第１回転ヨーク１５、第３回転ヨーク１８、第１集磁ヨーク２０の集磁部２０ｂ…、ホールＩＣ２２…、第２集磁ヨーク２１の集磁部２１ｂ、第４回転ヨーク１９、第２回転ヨーク１６を経て永久磁石１７のＳ極へと磁束が流れることになる。而して永久磁石１７の内周側のＮ極に第１リング部１５ａを対向させた第１回転ヨーク１５の第１爪部１５ｂ…と第３回転ヨーク１８の第３爪部１８ｂ…との半径方向重なり量ならびに永久磁石１７の外周側に第２リング部１６ａを対向させた第２回転ヨーク１６の第２爪部１６ｂ…と第４回転ヨーク１９の第４爪部１９ｂ…の半径方向重なり量、すなわち第２軸１２に対する第１軸１１の前記他方向へのねじり量が大きくなるにつれて磁束密度が大きくなる。 When the first shaft 11 is rotated in the other direction (the direction indicated by the arrow 39 in FIG. 10) from the neutral state, as shown in FIG. 10 (c), the first pawl portion 15b of the first rotating yoke 15. Of the third rotating yoke 18 overlaps with the third claw portions 18b in the radial direction, and the second claw portion 16b of the second rotating yoke 16 has a radius on the fourth claw portion 19b of the fourth rotating yoke 19. More parts overlap in the direction. In this state, from the north pole of the permanent magnet 17 to the first rotating yoke 15, the third rotating yoke 18, the magnetic collecting parts 20 b of the first magnetic collecting yoke 20, the Hall IC 22, and the magnetic collecting parts of the second magnetic collecting yoke 21. The magnetic flux flows to the south pole of the permanent magnet 17 through 21b, the fourth rotating yoke 19, and the second rotating yoke 16. Thus, the first claw portion 15b of the first rotating yoke 15 with the first ring portion 15a opposed to the N pole on the inner peripheral side of the permanent magnet 17 and the third claw portion 18b of the third rotating yoke 18. The radial overlap between the second claw portions 16b of the second rotating yoke 16 and the fourth claw portions 19b of the fourth rotating yoke 19 with the second ring portion 16a facing the outer circumferential side of the permanent magnet 17 As the amount, that is, the amount of twist of the first shaft 11 in the other direction with respect to the second shaft 12 increases, the magnetic flux density increases.

　このようにして、第１回転ヨーク１５の第１爪部１５ｂ…および第２回転ヨーク１６の第２爪部１６ｂ…と、第３回転ヨーク１８の第３爪部１８ｂ…および第４回転ヨーク１９の第４爪部１９ｂ…との間での周方向相対位置が変化することで、第１および第２集磁ヨーク２０，２１間での磁束に変化が生じ、それにより第１軸１１および第２軸１２間の捩れが検出されることになる。しかもリング状の永久磁石１７が径方向に着磁されるものであるので、着磁コストを小さくすることができ、磁極間の磁力ばらつきの影響も小さく抑えることができる。 In this way, the first claw portion 15b of the first rotary yoke 15 and the second claw portion 16b of the second rotary yoke 16, the third claw portion 18b of the third rotary yoke 18, and the fourth rotary yoke 19 are formed. Change in the circumferential relative position with respect to the fourth claw portions 19b... Changes in the magnetic flux between the first and second magnetic flux collecting yokes 20 and 21, thereby causing the first shaft 11 and the first A twist between the two shafts 12 is detected. In addition, since the ring-shaped permanent magnet 17 is magnetized in the radial direction, the magnetizing cost can be reduced, and the influence of the magnetic force variation between the magnetic poles can be reduced.

　また第１～第４回転ヨーク１５，１６，１８，１９、永久磁石１７、第１および第２集磁ヨーク２０，２１を覆って固定位置に配置される合成樹脂製のセンサハウジング３０に、永久磁石１７と、第１および第２集磁ヨーク２０，２１とがインサート結合されるので、磁力のばらつきをセンサ設定（中立位置の出力など）の変更で調整する場合、永久磁石１７およびホールＩＣ２２…が内蔵されたトルクセンサだけでセンサ出力調整ができるので、電動パワーステアリング装置におけるステアリングシャフトの中間部等への組付け工数を少なくすることができる。 Further, the sensor housing 30 made of synthetic resin, which is disposed at a fixed position so as to cover the first to fourth rotating yokes 15, 16, 18, 19, the permanent magnet 17, and the first and second magnetic collecting yokes 20, 21, is permanently attached. Since the magnet 17 and the first and second magnetic collecting yokes 20 and 21 are insert-coupled, when adjusting the variation in magnetic force by changing the sensor setting (e.g. neutral position output), the permanent magnet 17 and the Hall IC 22. Since the sensor output can be adjusted only by the torque sensor with the built-in motor, it is possible to reduce the number of assembling steps to the intermediate portion of the steering shaft in the electric power steering apparatus.

　さらに第１および第２回転ヨーク１５，１６と、第１および第２回転ヨーク１５，１６の一部をインサート結合せしめた合成樹脂製の第１ホルダ２４と、第１カラー２３とを備える第１軸側回転ヨーク体２５が第１軸１１に固定され、第３および第４回転ヨーク１８，１９と、第３および第４回転ヨーク１８，１９の一部をインサート結合せしめた合成樹脂製の第２ホルダ２７と、第２カラー２７とを備える第２軸側回転ヨーク体２８が第２軸１２に固定されるので、第１軸側回転ヨーク体２５および第２軸側回転ヨーク体２８を予め組み立てておくことで、第１および第２回転ヨーク１５，１６の第１軸１１への組付け工数ならびに第３および第４回転ヨーク１８，１９の第２軸１２への組付け工数を低減して組付け作業効率を高めることができる。 Further, the first and second rotating yokes 15 and 16, a first holder 24 made of synthetic resin in which a part of the first and second rotating yokes 15 and 16 are insert-bonded, and a first collar 23 are provided. A shaft-side rotating yoke body 25 is fixed to the first shaft 11, and the third and fourth rotating yokes 18, 19 and a part of the third and fourth rotating yokes 18, 19 are insert-bonded and made of synthetic resin. Since the second shaft-side rotary yoke body 28 including the two holders 27 and the second collar 27 is fixed to the second shaft 12, the first shaft-side rotary yoke body 25 and the second shaft-side rotary yoke body 28 are preliminarily attached. By assembling, the man-hours for assembling the first and second rotating yokes 15, 16 to the first shaft 11 and the man-hours for assembling the third and fourth rotating yokes 18, 19 to the second shaft 12 are reduced. To improve the assembly work efficiency. Can.

　以上、本発明の実施の形態について説明したが、本発明は上記実施の形態に限定されるものではなく、その要旨を逸脱することなく種々の設計変更を行うことが可能である。 The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist of the present invention.

Claims (3)

　トーションバー（１３）を介して同軸に連結される第１軸（１１）および第２軸（１２）間の捩れを検出するトルクセンサであって、第１リング部（１５ａ）ならびに第１リング部（１５ａ）の周方向に等間隔をあけた複数箇所に連設されて軸方向に延びる複数個の第１爪部（１５ｂ）を有して第１軸（１１）に固定される第１回転ヨーク（１５）と、第１リング部（１５ａ）よりも大径に形成されて第１リング部（１５ａ）を同軸に囲繞する第２リング部（１６ａ）ならびに第２リング部（１６ａ）の周方向に等間隔をあけた複数箇所に連設されて軸方向に延びるとともに先端部が複数個の第１爪部（１５ｂ）の先端部間に配置される複数個の第２爪部（１６ｂ）を有して第１軸（１１）に固定される第２回転ヨーク（１６）と、内周側および外周側が相互に異なる極となるように径方向に着磁されて第１および第２リング部（１５ａ，１６ａ）間に固定配置されるリング状の永久磁石（１７）と、第３リング部（１８ａ）ならびに第３リング部（１８ａ）の周方向に等間隔をあけた複数箇所に連設されるとともに先端部を第１および第２爪部（１５ｂ，１６ｂ）の先端部に対向させる複数個の第３爪部（１８ｂ）を有して第２軸（１２）に固定される第３回転ヨーク（１８）と、第３リング部（１８ａ）と同径に形成されるとともに第２軸（１２）の軸方向で第３リング部（１８ａ）からずれた位置に配置される第４リング部（１９ａ）ならびに第４リング部（１９ａ）の周方向等間隔をあけた複数箇所に連設されるとともに第１および第２爪部（１５ｂ，１６ｂ）の先端部に先端部を対向させるようにして第３爪部（１８ｂ）の先端部間に配置される複数個の第４爪部（１９ｂ）を有して第２軸（１２）に固定される第４回転ヨーク（１９）と、第３および第４リング部（１８ａ，１９ａ）にそれぞれ対向して固定位置に配置される第１および第２集磁ヨーク（２０，２１）と、第１および第２集磁ヨーク（２０，２１）間に設けられる磁気検出素子（２２）とを備えることを特徴とするトルクセンサ。 A torque sensor for detecting torsion between a first shaft (11) and a second shaft (12) connected coaxially via a torsion bar (13), the first ring portion (15a) and the first ring portion First rotation fixed to the first shaft (11) having a plurality of first claw portions (15b) extending in the axial direction and connected to a plurality of locations at equal intervals in the circumferential direction of (15a) The circumference of the yoke (15), the second ring portion (16a) and the second ring portion (16a) which are formed larger in diameter than the first ring portion (15a) and coaxially surround the first ring portion (15a). A plurality of second claw portions (16b) arranged in a plurality of locations at equal intervals in the direction and extending in the axial direction and having a tip portion disposed between the tip portions of the plurality of first claw portions (15b) A second rotating yoke (16) fixed to the first shaft (11) and having an inner peripheral side A ring-shaped permanent magnet (17) that is magnetized in the radial direction so that the outer peripheral sides are different from each other and fixed between the first and second ring portions (15a, 16a), and a third ring portion (18a) and a plurality of third ring portions (18a) that are connected to a plurality of locations at equal intervals in the circumferential direction and that have the tip portions opposed to the tip portions of the first and second claw portions (15b, 16b). A third rotating yoke (18) having a third claw portion (18b) and being fixed to the second shaft (12); and a second shaft formed with the same diameter as the third ring portion (18a). The fourth ring portion (19a) and the fourth ring portion (19a) arranged at positions displaced from the third ring portion (18a) in the axial direction of (12) are continuously provided at a plurality of positions spaced at equal intervals in the circumferential direction. And tip portions of the first and second claw portions (15b, 16b) A fourth rotation having a plurality of fourth claw portions (19b) disposed between the front end portions of the third claw portion (18b) so that the front end portions are opposed to each other and fixed to the second shaft (12). The first and second magnetic flux collecting yokes (20, 21), the first and second magnetic flux collecting yokes, which are disposed at fixed positions facing the yoke (19), the third and fourth ring portions (18a, 19a), respectively. A torque sensor comprising: a magnetic detecting element (22) provided between the magnetic yokes (20, 21). 　第１～第４回転ヨーク（１５，１６，１８，１９）、前記永久磁石（１７）、第１および第２集磁ヨーク（２０，２１）を覆って固定位置に配置される合成樹脂製のセンサハウジング（３０）に、前記永久磁石（１７）および前記両集磁ヨーク（２０，２１）がインサート結合されることを特徴とする請求項１記載のトルクセンサ。 Made of synthetic resin, which is disposed at a fixed position covering the first to fourth rotating yokes (15, 16, 18, 19), the permanent magnets (17), the first and second magnetic flux collecting yokes (20, 21). The torque sensor according to claim 1, wherein the permanent magnet (17) and the magnetic flux collecting yokes (20, 21) are insert-coupled to the sensor housing (30). 　第１および第２回転ヨーク（１５，１６）と、第１および第２回転ヨーク（１５，１６）の一部をインサート結合せしめた合成樹脂製の第１ホルダ（２４）とを備える第１軸側回転ヨーク体（２５）が第１軸（１１）に固定され、第３および第４回転ヨーク（１８，１９）と、第３および第４回転ヨーク（１８，１９）の一部をインサート結合せしめた合成樹脂製の第２ホルダ（２７）とを備える第２軸側回転ヨーク体（２８）が第２軸（１２）に固定されることを特徴とする請求項１または２記載のトルクセンサ。 A first shaft including first and second rotating yokes (15, 16) and a first holder (24) made of synthetic resin in which a part of the first and second rotating yokes (15, 16) is insert-bonded. The side rotary yoke body (25) is fixed to the first shaft (11), and the third and fourth rotary yokes (18, 19) and a part of the third and fourth rotary yokes (18, 19) are insert-coupled. The torque sensor according to claim 1 or 2, wherein a second shaft side rotary yoke body (28) provided with a second holder (27) made of synthetic resin is fixed to the second shaft (12). .
PCT/JP2010/060520 2009-10-20 2010-06-22 Torque sensor Ceased WO2011048846A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-241298 2009-10-20
JP2009241298A JP5243385B2 (en) 2009-10-20 2009-10-20 Torque sensor

Publications (1)

Publication Number Publication Date
WO2011048846A1 true WO2011048846A1 (en) 2011-04-28

Family

ID=43900088

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/060520 Ceased WO2011048846A1 (en) 2009-10-20 2010-06-22 Torque sensor

Country Status (2)

Country Link
JP (1) JP5243385B2 (en)
WO (1) WO2011048846A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013146425A1 (en) * 2012-03-28 2013-10-03 カヤバ工業株式会社 Electric power steering device
CN103900748A (en) * 2012-12-25 2014-07-02 株式会社捷太格特 Torque Detector and Steering System including the Torque Detector
EP2833110A1 (en) * 2013-08-02 2015-02-04 Jtekt Corporation Torque detecting device and electric power steering system
EP3276318A1 (en) * 2016-07-27 2018-01-31 Jtekt Corporation Torque detection device and electric power steering system
CN110873617A (en) * 2018-08-29 2020-03-10 株式会社捷太格特 Sensor device
CN111051836A (en) * 2017-09-01 2020-04-21 株式会社电装 Torque detection device and magnetic sensor module
US11579031B2 (en) * 2020-01-20 2023-02-14 Melexis Technologies Sa Sensor structure for measuring torque

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5899090B2 (en) * 2012-09-14 2016-04-06 日立オートモティブシステムズステアリング株式会社 Torque sensor
JP5978876B2 (en) * 2012-09-14 2016-08-24 株式会社ジェイテクト Torque detection device and steering device including the same
JP2014092452A (en) * 2012-11-02 2014-05-19 Jtekt Corp Torque detector and steering device with the same
CN106225980A (en) * 2016-07-31 2016-12-14 青岛三祥高科汽车电子有限公司 Non-contact torque sensor
WO2018024126A1 (en) * 2016-07-31 2018-02-08 青岛三祥高科汽车电子有限公司 Contactless torque sensor
WO2019044562A1 (en) * 2017-09-01 2019-03-07 株式会社デンソー TORQUE DETECTION DEVICE AND MAGNETIC SENSOR MODULE
US11953395B2 (en) * 2022-03-18 2024-04-09 Allegro Microsystems, Llc Magnetic field differential linear torque sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344528A (en) * 1989-07-12 1991-02-26 Nippon Seiko Kk torque detector
JP2005308443A (en) * 2004-04-19 2005-11-04 Tokyo Cosmos Electric Co Ltd Non-contact torque sensor
JP2008203176A (en) * 2007-02-22 2008-09-04 Nsk Ltd Torque sensor and electric power steering device using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0344528A (en) * 1989-07-12 1991-02-26 Nippon Seiko Kk torque detector
JP2005308443A (en) * 2004-04-19 2005-11-04 Tokyo Cosmos Electric Co Ltd Non-contact torque sensor
JP2008203176A (en) * 2007-02-22 2008-09-04 Nsk Ltd Torque sensor and electric power steering device using the same

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013146425A1 (en) * 2012-03-28 2013-10-03 カヤバ工業株式会社 Electric power steering device
JP2013203212A (en) * 2012-03-28 2013-10-07 Kyb Co Ltd Electric power steering device
US9296413B2 (en) 2012-03-28 2016-03-29 Kyb Corporation Electric power steering device
CN107380259A (en) * 2012-03-28 2017-11-24 Ｋｙｂ株式会社 Driven steering device
CN103900748A (en) * 2012-12-25 2014-07-02 株式会社捷太格特 Torque Detector and Steering System including the Torque Detector
EP2833110A1 (en) * 2013-08-02 2015-02-04 Jtekt Corporation Torque detecting device and electric power steering system
CN104554427A (en) * 2013-08-02 2015-04-29 株式会社捷太格特 Torque detecting device and electric power steering system
US9255857B2 (en) 2013-08-02 2016-02-09 Jtekt Corporation Torque detecting device and electric power steering system
EP3276318A1 (en) * 2016-07-27 2018-01-31 Jtekt Corporation Torque detection device and electric power steering system
CN107662635A (en) * 2016-07-27 2018-02-06 株式会社捷太格特 Torque detecting apparatus and electric power-assisted steering apparatus
US10683032B2 (en) 2016-07-27 2020-06-16 Jtekt Corporation Torque detection device and electric power steering system
CN107662635B (en) * 2016-07-27 2021-08-17 株式会社捷太格特 Torque detection device and electric power steering device
CN111051836A (en) * 2017-09-01 2020-04-21 株式会社电装 Torque detection device and magnetic sensor module
CN110873617A (en) * 2018-08-29 2020-03-10 株式会社捷太格特 Sensor device
CN110873617B (en) * 2018-08-29 2024-02-13 株式会社捷太格特 sensor device
US11579031B2 (en) * 2020-01-20 2023-02-14 Melexis Technologies Sa Sensor structure for measuring torque

Also Published As

Publication number Publication date
JP2011089783A (en) 2011-05-06
JP5243385B2 (en) 2013-07-24

Similar Documents

Publication Publication Date Title
JP5243385B2 (en) Torque sensor
JP6511137B2 (en) Brushless motor
CN102187181B (en) Sensor device for measuring the rotational position of a rotating component
JP5730045B2 (en) Permanent magnet rotor
JP2006201033A (en) Torque detection device
JP2010243407A (en) Torque sensor
US10094722B2 (en) Torque sensor device
CN110546857A (en) Motor and Electric Power Steering
JP6214444B2 (en) Stator unit, torque detection device, electric power steering device, and stator unit manufacturing method
JP2020129951A (en) Electric motor and manufacturing method thereof
JP2007121149A (en) Torque detection device
EP2848906A1 (en) Relative rotational angle displacement detecting device, torque detecting device and torque control device using said detecting device, and vehicle provided with said control device
US20150137798A1 (en) Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle
WO2005111565A1 (en) Torque detector
CN106794872A (en) Torque sensor device
JP2011017648A (en) Relative angle detector and power steering device
JP2019120671A (en) Torque sensor
JP2010243399A (en) Torque sensor
JPH11308812A (en) Sensor magnet mounting device for motor with sensor
JP2005326368A (en) Torque detection device
JP2013005595A (en) Rotary electric machine
JP2010193555A (en) Electric motor
JP4878747B2 (en) Torque sensor
JP2007271565A (en) Torque detection device
JP4878746B2 (en) Torque sensor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10824698

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 10824698

Country of ref document: EP

Kind code of ref document: A1