阅读说明：本技术 磁力检测装置、转矩传感器以及电动动力转向装置 (Magnetic force detection device, torque sensor and electric power steering device ) 是由 前原秀雄 于 2018-04-03 设计创作，主要内容包括：磁力检测装置(60)具备：基板(61),其具有贯穿孔(61d)；传感器本体(62a),其以与贯穿孔(61d)重复的方式而被支承于基板(61)；一对爪部(63c、64c),其被配置成将贯穿孔(61d)以及传感器本体(62a)夹住,并将来自磁力产生部(31)的磁通感应至传感器本体(62a)；软磁性部件(67),其至少一部分被设置于贯穿孔(61d)的内部。(Magnetic force detection device (60) has: substrate (61), with through hole (61d)；Sensor body (62a), by with through hole (61d) it is duplicate in a manner of and be supported in substrate (61)；A pair of of claw (63c, 64c), is configured to will pass through hole (61d) and sensor body (62a) is clamped, and will the flux of magnetic induction from magnetic force generating unit (31) to sensor body (62a)；Soft magnetic member (67), at least part are arranged at the inside of through hole (61d).)

1. a kind of magnetic force detection device, has:

Substrate, with through-Penetration portion；

Magnetic force test section, by with the through-Penetration portion it is duplicate in a manner of and be supported in the substrate；

A pair of of magnetic force induction portion is configured to clamp the through-Penetration portion and the magnetic force test section, and will come from magnetic force The flux of magnetic induction of generating unit is to the magnetic force test section；

Soft magnetic member, at least part are arranged at the inside of the through-Penetration portion.

2. magnetic force detection device as described in claim 1, wherein

The soft magnetic member has first opposed faces opposed with the magnetic force test section,

First opposed faces are located at the inside of the through-Penetration portion.

3. magnetic force detection device as described in claim 1, wherein

The soft magnetic member has second opposed faces opposed with a side in the pair of magnetic force induction portion,

Second opposed faces are located at the inside of the through-Penetration portion.

4. magnetic force detection device as described in claim 1, wherein

The soft magnetic member is fixed in the substrate by soldering.

5. magnetic force detection device as described in claim 1, wherein

Apply anti-wet coating on the substrate,

The magnetic force test section and the soft magnetic member are capped by anti-wet coating.

6. magnetic force detection device as described in claim 1, wherein

The through-Penetration portion is through hole.

7. a kind of torque sensor, wherein have:

Magnetic force detection device described in claim 1；

The magnetic force generating unit；

First axle is rotated together with the magnetic force generating unit；

Torsion bar links with the first axle, and carries out torsional deflection according to the torque for being input to the first axle；

Second axis links with the torsion bar, and carries out phase relative to the first axle according to the torsional deflection of the torsion bar To rotation；

Rotation magnetic force circuit portion is supported in second axis, and according to the opposite rotation of the first axle and second axis Then the size for the magnetic flux for being directed to the pair of magnetic force induction portion from the magnetic force generating unit and direction is made to change.

8. a kind of electric power steering device, wherein have:

Torque sensor as claimed in claim 7；

Motor, basis is acted by the torque that the torque sensor detects, to make wheel steering.

Technical field

The present invention relates to a kind of magnetic force detection device, has the torque sensor of the magnetic force detection device and have this The electric power steering device of torque sensor.

Background technique

In Japanese Unexamined Patent Publication JP2016-102671A, disclose it is a kind of have be surface mounted on substrate magnetic force sensing Magnetic force detection device including device.The magnetic force detection device has the first and second collection magnetic that magnetic flux is converged to magnetic portion Ring, magnetometric sensor are configured between the magnetic portion of the first and second ring concentrator.Notch section is formed on substrate, magnetic force passes Sensor and notch section repeat.By the way that the magnetic portion of the second ring concentrator to be inserted into the inside of the notch section of substrate, to reduce Magnetic gap between the magnetic portion of first and second ring concentrator, improves the detection sensitivity of magnetic force detection device.

In order to assemble magnetic force detection device disclosed in Japanese Unexamined Patent Publication JP2016-102671A, need to be inserted into notch section Magnetic portion.Therefore, it is necessary to be aligned with higher precision to magnetic portion and notch section, the assembling of magnetic force detection device is wanted Seek the technology of height.

Summary of the invention

Problems to be solved by the invention

It is an object of the present invention to improve the detection sensitivity of magnetic force detection device, and improve assemblability.

The solution to the problem

Some way according to the present invention, magnetic force detection device have: substrate, with through-Penetration portion；Magnetic force test section, By with through-Penetration portion it is duplicate in a manner of and be supported in substrate；A pair of of magnetic force induction portion, is configured to will pass through portion and magnetic force Test section is clamped, and by the flux of magnetic induction from magnetic force generating unit to magnetic force test section；Soft magnetic member, at least part quilt It is set to the inside of through-Penetration portion.

Detailed description of the invention

Fig. 1 is the structure chart of electric power steering device involved in embodiments of the present invention.

Fig. 2 is the partial sectional view of electric power steering device involved in embodiments of the present invention.

Fig. 3 is the perspective view of rotation magnetic force circuit portion.

Fig. 4 is the perspective view of magnetic force detection device involved in embodiments of the present invention.

Fig. 5 is the cross-sectional view of magnetic force detection device involved in embodiments of the present invention.

Fig. 6 is the enlarged cross-sectional view for indicating the periphery of magnetometric sensor shown in fig. 5.

Fig. 7 is the perspective view of substrate shown in fig. 5.

Specific embodiment

Hereinafter, being passed on one side to magnetic force detection device 60 involved in embodiments of the present invention, torque on one side referring to attached drawing Sensor 30 and electric power steering device 100 are illustrated.

Firstly, referring to Fig.1, being illustrated to electric power steering device 100.Electric power steering device 100 is carried In on vehicle, and the manipulation for the steering wheel 1 realized by driver is assisted.

Electric power steering device 100 includes steering shaft 11, is rotated according to the rotation of steering wheel 1；Rack shaft 12, wheel 2 is turned to according to the rotation of steering shaft 11.Rack shaft 12 via joint arm 3 (Knuckle arm) and with Wheel 2 links.

Steering shaft 11 includes the input shaft 13 as first axle, links with steering wheel 1；Output shaft as the second axis 15, link via torsion bar 14 with input shaft 13.On output shaft 15, it is formed with and is engaged with the rack tooth 12a of rack shaft 12 Pinion gear 16, output shaft 15 and rack shaft 12 are linked together with engaging for rack tooth 12a by pinion gear 16.Because of side The manipulation torque generated to the manipulation of disk 1 is passed to rack shaft 12 via steering shaft 11.

In addition, electric power steering device 100 has the assistance mechanism 20 assisted the manipulation of driver.Friendly machine Structure 20 has: motor 21；Worm shaft 22 links with the output shaft of motor 21；Turbine 23 is engaged with worm shaft 22； Pinion shaft (Pinion shaft) 24 links with turbine 23.On pinion shaft 24, it is formed with the rack gear with rack shaft 12 The pinion gear 25 of tooth 12a engagement, is linked pinion shaft 24 and rack shaft 12 with engaging for rack tooth 12a by pinion gear 25 Together.The assist torque generated by the driving of motor 21 via worm shaft 22, turbine 23 and pinion shaft 24 and by It is transferred to rack shaft 12.

In this way, in electric power steering device 100, the manipulation torque of steering wheel 1 and the assist torque point of motor 21 It is not independently communicated to rack shaft 12.Above-mentioned electric power steering device 100 is also referred to as " electric-powered turn of double-pinion type To device ".

Electric power steering device 100 is also equipped with: torque sensor 30, is turned to the manipulation being input in input shaft 13 Square is detected；Controller 40 controls the movement of motor 21.Torque sensor 30 and controller 40 are via signal Line 41 and be electrically connected.Torque sensor 30 receives electric power from controller 40, and will be corresponding with the manipulation torque detected Signal to controller 40 export.Controller 40 carries out the movement of motor 21 according to the signal from torque sensor 30 Control.That is, motor 21 generates assist torque according to the manipulation torque detected by torque sensor 30.

As shown in Fig. 2, input shaft 13 is supported in the first shell via bearing 11a in a manner of it can rotate freely 51, output shaft 15 is supported in second housing 52 via bearing 11b and 11c in a manner of it can rotate freely.It is exporting On axis 15, the hole 15a of oriented the upper end face opening is formed, the lower end 13a of input shaft 13 is inserted into the 15a of hole.

A part of input shaft 13 is formed hollow, and torsion bar 14 is inserted into the inside of input shaft 13.Torsion bar 14 it is upper End 14a links via pin 17 with input shaft 13.The lower end 14b of torsion bar 14 is prominent from the lower end 13a of input shaft 13, and It is inserted into the hole 15b of the bottom opening of the hole 15a of output shaft 15.It is formed in the periphery of the lower end 14b of torsion bar 14 Toothed edge (Serration), torsion bar 14 and output shaft 15 are attached at together via the toothed edge.

Torsion bar 14 and output shaft 15 are configured to coaxial with the Pivot axle of input shaft 13.Torsion bar 14 will be from steering wheel 1 is input to the manipulation torque transfer of input shaft 13 to output shaft 15 (referring to Fig.1), and torsion bar 14 according to the manipulation torque and Carry out torsional deflection.

Hereinafter, by " axial direction " is known as along the direction of the Pivot axle of input shaft 13, it will be in the rotation of input shaft 13 Radiation direction centered on mandrel is known as " radial direction ", and will be known as " week around the direction of the Pivot axle of input shaft 13 To ".

Torque sensor 30 is mounted in a manner of bridgeing across input shaft 13 and output shaft 15.Specifically, torque sensing Device 30 includes magnetic force generating unit 31, is supported in input shaft 13；Rotation magnetic force circuit portion 32 is supported in output shaft 15； Fixed magnetic force circuit portion 33, is fixed in the first shell 51.Magnetic force generating unit 31 rotates together with input shaft 13, rotation magnetic force Circuit portion 32 rotates together with output shaft 15.

Magnetic force generating unit 31 includes cricoid back yoke portion (back yoke) 31a, chimeric with the periphery of input shaft 13；Ring Shape magnet 31b, in conjunction with the lower end surface of back yoke portion 31a.Annular magnet 31b is axially and generates the permanent magnet of magnetic force, It has 12 magnetic poles being formed in the circumferential with equal width.That is, on each end face of annular magnet 31b, edge It is circumferential and alternately form that there are six the pole N and six poles S.Above-mentioned annular magnet 31b is also referred to as " multi-pole magnet ", and is It is formed and applying magnetic field axially along to cricoid hard magnetic body.

Back yoke portion 31a is formed by soft magnetic material, guides magnetic flux between the adjacent magnetic pole of annular magnet 31b.Therefore, ring The magnetic force of shape magnet 31b concentrates on the side opposite with back yoke portion 31a.

As shown in FIG. 2 and 3, rotation magnetic force circuit portion 32 has: first and second soft magnetism ring 32a, 32b；Branch Bearing portion part 32c, supports first and second soft magnetism ring 32a, 32b via casting resin 32d.Bearing part 32c is installed in output shaft 15.In addition, the diagram of casting resin 32d is omitted in Fig. 3.

First soft magnetism ring 32a includes the first magnetic circuit ring portion 32e, surrounds the back yoke 31a of magnetic force generating unit 31；Six A first magnetic circuit column portion 32f, it is prominent from the first magnetic circuit ring portion 32e towards axial lower section；First magnetic circuit front end 32g, from The lower end of each first magnetic circuit column portion 32f, which is risen, is respectively facing radially inner side complications.First magnetic circuit front end 32g and annular magnet 31b Lower end surface it is opposed.Second soft magnetism ring 32b includes the second magnetic circuit ring portion 32h, be configured in the axial direction with the first magnetic circuit Ring portion 32e is across interval；Six the second magnetic circuit column portion 32i, it is prominent towards axial top from the second magnetic circuit ring portion 32h；The Two magnetic circuit front end 32j are respectively facing radially inner side complications from the upper end of each second magnetic circuit column portion 32i.Before second magnetic circuit End 32j is opposed with the lower end surface of annular magnet 31b.

First magnetic circuit front end 32g and the second magnetic circuit front end 32j is by the circumferential alternately in a manner of equally spaced And it is configured on the same plane orthogonal with the Pivot axle of torsion bar 14.In addition, the first magnetic circuit front end 32g and the second magnetic Road front end 32j is configured to, under the neutral condition that torque does not act on torsion bar 14, each center line for extending radially Refer to the pole N of annular magnet 31b and the boundary of the pole S.Therefore, the pole N and the pole S of annular magnet 31b passes through the first magnetic circuit front end Portion 32g and the second magnetic circuit front end 32j and by magnet short-cut path, the magnetic flux of annular magnet 31b is not directed to rotation magnetic force circuit portion 32 the first magnetic circuit ring portion 32e and the second magnetic circuit ring portion 32h.

When torque acts on torsion bar 14 in a predetermined direction and makes 15 relative rotation of input shaft 13 and output shaft, the One magnetic circuit front end 32g by N is great compared with the pole S have biggish area in a manner of and it is opposed with annular magnet 31b, also, Two magnetic circuit front end 32j by S is great compared with the pole N have biggish area in a manner of and it is opposed with annular magnet 31b.Its result It is to be released from by the magnet short-cut path that the first magnetic circuit front end 32g and the second magnetic circuit front end 32j is generated, the magnetic flux of annular magnet 31b It is directed to the first magnetic circuit ring portion 32e and the second magnetic circuit ring portion 32h of rotation magnetic force circuit portion 32.

When torque acts on torsion bar 14 in the opposite direction and makes 15 relative rotation of input shaft 13 and output shaft, first Magnetic circuit front end 32g by S is great compared with the pole N have biggish area in a manner of and it is opposed with annular magnet 31b, also, second Magnetic circuit front end 32j by N is great compared with the pole S have biggish area in a manner of and it is opposed with annular magnet 31b.As a result, The magnetic flux of annular magnet 31b is guided in reverse direction to the first magnetic circuit ring portion 32e of rotation magnetic force circuit portion 32 and the second magnetic Road ring portion 32h.

The torque for acting on torsion bar 14 is bigger, then the torsional deflection amount of torsion bar 14 is bigger.Therefore, the first magnetic circuit front end The N of the difference in areas and the second magnetic circuit front end 32j and annular magnet 31b of the pole N of 32g and annular magnet 31b and the face-off of the pole S The difference in areas of pole and the face-off of the pole S becomes larger, and the first magnetic circuit ring portion of rotation magnetic force circuit portion 32 is directed to from annular magnet 31b The magnetic flux of 32e and the second magnetic circuit ring portion 32h become larger.

In this way, the first magnetic circuit front end 32g of rotation magnetic force circuit portion 32 and the second magnetic circuit front end 32j are according to effect In the direction and size of the torque on torsion bar 14, and make to be directed to the first magnetic circuit ring portion 32e and the from annular magnet 31b The direction and size of the magnetic flux of two magnetic circuit ring portion 32h change.

Magnetic force generating unit 31 is fixed on output shaft in a manner of rotating together with output shaft 15 alternatively, it is also possible to use 15, and rotation magnetic force circuit portion 32 is fixed on to the structure of input shaft 13 in a manner of rotating together with input shaft 13, to replace Magnetic force generating unit 31 is fixed on input shaft 13 and rotation magnetic force circuit portion 32 is fixed on to the structure of output shaft 15.

As shown in Fig. 2, fixed magnetic force circuit portion 33 is with the inner peripheral surface for being fixed in the first shell 51 by riveting First ring concentrator 33a and the second ring concentrator 33b.First ring concentrator 33a along rotation magnetic force circuit portion 32 the first magnetic circuit ring The periphery of portion 32e (referring to Fig. 3) and be set.Therefore, the magnetic flux of the annular magnet 31b from magnetic force generating unit 31 is via rotation First soft magnetism ring 32a of magnetic force circuit portion 32 and be directed to the first ring concentrator 33a.Similarly, the second ring concentrator 33b along The periphery of second magnetic circuit ring portion 32h (referring to Fig. 3) of rotation magnetic force circuit portion 32 and be set.Therefore, magnetic force generating unit is come from The magnetic flux of 31 annular magnet 31b is directed to the second collection magnetic via the second soft magnetism ring 32b of rotation magnetic force circuit portion 32 Ring 33b.

In addition, torque sensor 30 have it is solid to being directed to from magnetic force generating unit 31 via rotation magnetic force circuit portion 32 Determine the magnetic force detection device 60 that the magnetic flux of magnetic force circuit portion 33 is detected.Hereinafter, referring to Fig. 4 to Fig. 7, to magnetic force detection device 60 are described in detail.

As shown in Figure 4 and 5, magnetic force detection device 60 has: substrate 61；Two magnetometric sensors 62 are mounted In substrate 61；First collection magnetic yoke portion 63 and the second collection magnetic yoke portion 64, future self-retaining magnetic force circuit portion 33 magnetic flux to magnetic Force snesor 62 guides.Substrate 61 is accommodated in the shell 65 installed on the first shell 51 (referring to Fig.1).First Collection magnetic yoke portion 63 and the second collection magnetic yoke portion 64 are kept by the holder 66 being fixed on shell 65.Holder 66 is along substrate 61 are arranged on shell 65 in a manner of it can assemble and disassemble.In addition, in Fig. 4, shell 65 and holder 66 is omitted Diagram.

On substrate 61, it is formed with for being supported in multiple hole 61b that the connecting pin 65a of shell 65 is inserted.In substrate Be formed with wiring (not shown) on 61 surface 61a by pattern, the wiring via connecting pin 65a and with signal wire 41 (referring to Fig.1) it is electrically connected.

Magnetometric sensor 62 includes the sensor body 62a as magnetic force test section, detects to magnetic flux density； The wiring of sensor body 62a and substrate 61 is electrically connected by multiple terminal 62b.Sensor body 62a includes output and magnetic flux The Hall element (illustration omitted) of the corresponding voltage of density, and by voltage corresponding with the size of magnetic flux density and direction via Substrate 61 and to controller 40 (referring to Fig.1) export.

Sensor body 62a is formed plate, and with the surface 61a of the back side 62d of sensor body 62a and substrate 61 Opposed mode and be arranged at substrate 61 substantially in parallel with substrate 61.Multiple terminal 62b are from the two sides of sensor body 62a Face extends to substrate 61, and is fixed on the wiring of substrate 61 by soldering.In this way, sensor body 62a is by multiple Terminal 62b and be supported in substrate 61.

In magnetic force detection device 60 be arranged two magnetometric sensor 62 the reason of be, by the voltage signal to the two into Row compares, to diagnose to the failure of magnetic force detection device 60.In other words, magnetic force is examined in unused magnetometric sensor 62 In the case that the failure of survey device 60 is diagnosed, magnetometric sensor 62 may be one.

First collection magnetic yoke portion 63 includes yoke portion ontology 63a, is formed substantially arc-shaped；A pair of of foot 63b, from Yoke portion ontology 63a is prominent；Claw (magnetic force induction portion) 63c, is arranged at the front end of each foot 63b.Similarly, the second collection magnetic Yoke portion 64 includes yoke portion ontology 64a, is formed substantially arc-shaped；A pair of of foot 64b, it is prominent from yoke portion ontology 64a； Claw (magnetic force induction portion) 64c, is arranged at the front end of each foot 64b.It is installed in outside first in magnetic force detection device 60 In the state of shell 51, the inner peripheral surface of yoke portion ontology 63a, 64a collect magnetic with first and the second of fixed magnetic force circuit portion 33 respectively The periphery face contact of ring 33a, 33b (referring to Fig. 2).

Yoke portion ontology 63a and yoke portion ontology 64a are configured in the axial direction across interval.Foot 63b and foot 64b with Towards front end and make it is mutual interval become narrow mode, the court from the end face opposite each other of yoke portion ontology 63a, 64a It is bent to radial outside.Claw 63c and claw 64c is formed tabular, and with by the sensor sheet of magnetometric sensor 62 The mode that body 62a and substrate 61 are clamped is configured across interval and in parallel each other.Claw 63c in a manner of across interval and Opposed with the surface 62c of sensor body 62a, back side 61c of the claw 64c in a manner of across interval and with substrate 61 is opposed.

Interval between claw 63c and claw 64c is compared with the interval between yoke portion ontology 63a and yoke portion ontology 64a Narrow, claw 63c and claw 64c will be from first and second ring concentrator 33a, 33b of fixed magnetic force circuit portion 33 (referring to Fig. 2) It is directed to the magnetic flux of yoke portion ontology 63a, 64a, is guided to sensor body 62a.Whereby, magnetic force detection device 60 to from The annular magnet 31b of magnetic force generating unit 31 is directed to the magnetic flux of fixed magnetic force circuit portion 33 via rotation magnetic force circuit portion 32 It is detected.

As shown in Fig. 6 and Fig. 7, there are two the through hole 61d as through-Penetration portion, the through hole 61d to exist for the tool of substrate 61 Run through between surface 61a and back side 61c.Magnetometric sensor 62 by sensor body 62a and through hole 61d it is duplicate in a manner of and by Substrate 61, claw 63c and claw 64c is configured to be matched in a manner of clamping sensor body 62a and through hole 61d It sets.

Soft magnetic member 67 is internally provided in through hole 61d.Soft magnetic member 67 is in a manner of blocking through hole 61d And it is formed and through hole 61d same shape.Soft magnetic member 67 is smaller by retentivity and the biggish material of magnetic susceptibility Material, such as iron, silicon steel, permalloy, amorphous magnetic alloy are formed.

The claw 64c in the second collection magnetic yoke portion 64 is opposed with soft magnetic member 67 in a manner of across interval.Therefore, in pawl The first magnetic gap G1, claw 64c and the soft magnetism being formed between portion 63c and claw 64c between claw 63c and soft magnetic member 67 The second magnetic gap G2 between component 67.

It is assumed that in the case where soft magnetic member 67 is not arranged at the inside of through hole 61d, in claw 63c and claw Magnetic gap G3 is formed between 64c.Therefore, leakage magnetic flux corresponding with the size of magnetic gap G3 produces between claw 63c and claw 64c It is raw.

In magnetic force detection device 60, as described above, the first magnetic gap G1 and the second magnetic gap G2 be formed on claw 63c with Between claw 64c.First magnetic gap G1 with the summation of the second magnetic gap G2 compared with magnetic gap G3, it is small to be equivalent to soft magnetic member 67 The amount of thickness.Since magnetic gap is smaller, then leakage magnetic flux is smaller, therefore, is not arranged in through hole 61d with soft magnetic member 67 The case where portion, compares, and the leakage magnetic flux in magnetic force detection device 60 is smaller.Since more magnetic fluxs pass through magnetic force detection device 60 Sensor body 62a therefore can be improved the detection sensitivity of magnetic force detection device 60.Therefore, it can reduce noise in this way External factor influence, so as to improve the detection accuracy of magnetic force detection device 60.

As the other methods reduced to the leakage magnetic flux between claw 63c and claw 64c, it is also contemplated that by claw 64c is inserted into the through hole 61d of substrate 61 and reduces the interval between claw 63c and claw 64c.However, in order to running through It is inserted into claw 64c in the 61d of hole, needs to align claw 64c and through hole 61d with higher precision, above-mentioned magnetic force is examined Survey the technology of the group reload request height of device.

In magnetic force detection device 60, soft magnetic member 67 is internally provided with due to the through hole 61d in substrate 61, because This, the magnetic gap between claw 63c and claw 64c becomes narrow because of soft magnetic member 67.It therefore, can be not by claw 64c The mode being inserted into the through hole 61d of substrate 61 reduces the leakage magnetic flux between claw 63c and claw 64c.Whereby, Neng Gouti The detection sensitivity of high magnetic force detection device 60, and can be improved assemblability.

Soft magnetic member 67 has the back side of the sensor body 62a with magnetometric sensor 62 in a manner of across interval The first 62d opposed opposed faces 67a.First opposed faces 67a is located at the inside of the through hole 61d of substrate 61.Therefore, soft magnetism portion Part 67 by not from the surface 61a of substrate 61 towards sensor body 62a it is outstanding in a manner of and be arranged in through hole 61d Portion.Therefore, it is managed by the interval between the back side 62d to sensor body 62a and the surface 61a of substrate 61, thus Magnetometric sensor 62 can be installed on substrate 61 in a manner of contacting sensor body 62a with soft magnetic member 67. Whereby, it can be improved the assemblability of magnetic force detection device 60.

In addition, soft magnetic member 67 has the second opposed faces 67b opposed with claw 64c in a manner of across interval. Second opposed faces 67b is located at the inside of the through hole 61d of substrate 61.Therefore, soft magnetic member 67 is not from the back side of substrate 61 61c is arranged at the inside of through hole 61d towards claw 64c mode outstanding.Therefore, by claw 64c and substrate 61 Between interval be managed, so as in a manner of contacting claw 64c and soft magnetic member 67 and claw 63c with Substrate 61 and magnetometric sensor 62 are configured between claw 64c.Whereby, it can be improved the assemblability of magnetic force detection device 60.

In addition, " inside that the first opposed faces 67a is located at the through hole 61d of substrate 61 " also include the first opposed faces 67a with The case where surface 61a of substrate 61 is formed together the continuous plane in a manner of no step difference.Similarly, " the second opposed faces 67b Positioned at the inside of the through hole 61d of substrate 61 " it include that the back side 61c of the second opposed faces 67b and substrate 61 is formed together with no platform The case where mode of scale continuous plane.

The copper foil pattern 61e that can adhere to soldering is formed in the opening edge of through hole 61d.Soft magnetic member 67 passes through attached In copper foil pattern 61e soldering (illustration omitted) and be fixed on substrate 61.Therefore, magnetic force is being sensed by soldering Device 62 is fixed in the process on substrate 61, soft magnetic member 67 can be fixed on substrate 61, so as to reduce magnetic force The assembling working hour of detection device 60.

In addition, since magnetometric sensor 62 and soft magnetic member 67 this two side are fixed on substrate 61, Neng Goufang The only relative movement of magnetometric sensor 62 and soft magnetic member 67.Therefore, it can prevent because of magnetometric sensor 62 and soft magnetism portion The reduction of detection accuracy caused by the variation at the interval between part 67.

On substrate 61, it is applied with anti-wet coating.Anti- wet coating be fixed on substrate 61 magnetometric sensor 62 and It is carried out in the state of soft magnetic member 67.That is, magnetometric sensor 62 and soft magnetic member 67 pass through anti-wet coating It is capped.Therefore, magnetometric sensor 62 and soft magnetic member 67 can be protected in order to avoid being subject to moisture, and can be prevented The case where soft magnetic member 67 falls off from substrate 61.

In magnetic force detection device 60, through hole 61d runs through substrate 61.Therefore, with notch run through substrate 61 the case where phase Compare, can reduce the deformation of substrate 61.Therefore, it can reduce the sensor body generated along with the deformation of substrate 61 The displacement of 62a, so as to improve the detection accuracy of magnetic force detection device 60.

Then, referring to figs. 1 to Fig. 5, to the detection for manipulating torque realized by torque sensor 30 and by electric-powered The auxiliary for the manipulation that transfer 100 is realized is illustrated.

In the state that steering wheel 1 is not operated, manipulation torque does not act on torsion bar 14.Under the neutral condition, rotation Before the second magnetic circuit of the first magnetic circuit front end 32g and the second soft magnetism ring 32b of first soft magnetism ring 32a of magnetic force circuit portion 32 End 32j is extremely opposed with the pole N of annular magnet 31b and S with identical area respectively.Therefore, from annular magnet 31b's Magnetic flux is not directed to the second magnetic circuit ring of the first magnetic circuit ring portion 32e and the second soft magnetism ring 32b of the first soft magnetism ring 32a Portion 32h, so that the magnetic flux from annular magnet 31b is not directed to magnetic force detection device 60.

When driver manipulates steering wheel 1, torque is manipulated in torsion bar 14.According to manipulation torque size with And direction, make the magnetic flux from annular magnet 31b via rotation magnetic force circuit portion 32, fixed magnetic force circuit portion 33 and magnetic force The the first collection magnetic yoke portion 63 and the second collection magnetic yoke portion 64 of detection device 60 and be directed to the sensor sheet of magnetometric sensor 62 Body 62a.Sensor body 62a exports voltage corresponding with the size of magnetic flux density and direction.

In this way, the size of the sensor body 62a output of magnetic force detection device 60 and the manipulation torque for acting on torsion bar 14 And the corresponding voltage in direction.That is, electricity of the torque sensor 30 according to the sensor body 62a output by magnetic force detection device 60 Pressure, and the size and direction of the manipulation torque for being input to steering wheel 1 are detected.As noted previously, as can be improved Therefore the detection sensitivity of magnetic force detection device 60 can be improved the detection accuracy of torque sensor 30.

Voltage from torque sensor 30 is passed to controller 40 via signal wire 41.Controller 40 is according to coming from The voltage of torque sensor 30 and drive motor 21.Whereby, rack shaft 12 moves and is diverted wheel 2.In this way, electronic dynamic Power transfer 100 assists manipulation according to the manipulation torque for being input to steering wheel 1.It is passed due to can be improved torque The detection accuracy of sensor 30, therefore, can according to from driver to the torque that steering wheel 1 inputs and with higher precision to wheel 2 are turned to.

Next, being illustrated to the manufacturing method of magnetic force detection device 60.

Firstly, printing tinol (Solder paste) on the surface 61a of substrate 61.Then, in through hole 61d Portion configures soft magnetic member 67, and magnetometric sensor 62 is configured on the surface 61a of substrate 61, tinol is heated and Melt tinol.By keeping tinol cooling and solidifying, so that soft magnetic member 67 and magnetometric sensor 62 are fixed on On substrate 61.

Then, substrate 61 is inserted into shell 65.At this point, being inserted into connecting pin 65a into the hole 61b of substrate 61.Then, The wiring of substrate 61 and connecting pin 65a are electrically connected by soldering.

Then, the holder 66 for being equipped with the first collection magnetic yoke portion 63 and the second collection magnetic yoke portion 64 in advance is installed on shell On 65.At this point, by by holder 66 along substrate 61 and be inserted into shell 65, thus first collection magnetic yoke portion 63 claw The sensor body 62a and soft magnetic member of magnetometric sensor 62 are inserted between the claw 64c in the collection of 63c and second magnetic yoke portion 64 67。

It is produced as described above, magnetic force detection device 60 is assembled.

Hereinafter, summarizing structure, effect and effect that ground illustrates embodiments of the present invention.

Magnetic force detection device 60 has: substrate 61, with through hole 61d；Sensor body 62a, with through hole The duplicate mode of 61d and be supported in substrate 61；A pair of of claw 63c, 64c, are configured to will pass through hole 61d and sensor Ontology 62a is clamped, and by the flux of magnetic induction from magnetic force generating unit 31 to sensor body 62a；Soft magnetic member 67, at least A part is arranged at the inside of through hole 61d.

In this configuration, at least part for being internally provided with soft magnetic member 67 of the through hole 61d of substrate 61.Cause This, the magnetic gap between a pair of of claw 63c, 64c becomes narrow because of soft magnetic member 67.It therefore, can be with not passing through to substrate 61 It is inserted into the mode of claw 63c, 64c in perforation 61d and mitigates the flux leakage between a pair of of claw 63c, 64c.Whereby, it can be improved The detection sensitivity of magnetic force detection device 60, and can be improved assemblability.

In addition, soft magnetic member 67 has first opposed with sensor body 62a opposed in magnetic force detection device 60 Face 67a, the first opposed faces 67a are located at the inside of through hole 61d.

In this configuration, the first opposed faces 67a of soft magnetic member 67 is located at the inside of through hole 61d.Therefore, soft magnetism Component 67 by not towards sensor body 62a it is outstanding in a manner of and be arranged at through hole 61d.Therefore, by sensor sheet Interval between body 62a and substrate 61 is managed, so as to contact sensor body 62a with soft magnetic member 67 Mode and sensor body 62a is installed on substrate 61.

In addition, soft magnetic member 67 has second opposed with the claw 64c of a side opposed in magnetic force detection device 60 Face 67b, the second opposed faces 67b are located at the inside of through hole 61d.

In this configuration, the second opposed faces 67b of soft magnetic member 67 is located at the inside of through hole 61d.Therefore, soft magnetism Component 67 is arranged at through hole 61d in such a way that the claw 64c of not one side of direction is outstanding.Therefore, pass through the pawl to a side Interval between portion 64c and substrate 61 is managed, so as in a manner of contacting claw 64c and soft magnetic member 67 And substrate 61 and sensor body 62a are configured between a pair of of claw 63c, 64c.

In addition, soft magnetic member 67 is fixed in substrate 61 by soldering in magnetic force detection device 60.

In this configuration, soft magnetic member 67 is fixed in substrate 61 by soldering.Therefore, it will be passed by soldering Sensor ontology 62a is fixed in the process on substrate 61, soft magnetic member 67 can be fixed on substrate 61, so as to subtract The assembling working hour of few magnetic force detection device 60.

In addition, applying anti-wet coating, sensor body 62a and soft magnetism on substrate 61 in magnetic force detection device 60 Property component 67 it is capped by anti-wet coating.

In this configuration, sensor body 62a and soft magnetic member 67 are capped by anti-wet coating.Therefore, energy Enough sensor body 62a and soft magnetic member 67 are protected in order to avoid being subject to moisture, and soft magnetic member 67 can be prevented The case where falling off from substrate 61.

In addition, through hole 61d runs through substrate 61 in magnetic force detection device 60.

In this configuration, through hole 61d runs through substrate 61.It therefore, can compared with the case where running through substrate 61 with notch Mitigate the deformation of substrate 61.Therefore, it can reduce the displacement of the sensor body 62a generated along with the deformation of substrate 61, So as to improve the detection accuracy of magnetic force detection device 60.

In addition, torque sensor 30 has: magnetic force detection device 60；Magnetic force generating unit 31；Input shaft 13 is produced with magnetic force Life portion 31 is rotated together；Torsion bar 14 links with input shaft 13, and is carried out according to the torque for being input to input shaft 13 Torsional deflection；Output shaft 15 links with torsion bar 14, and carries out phase relative to input shaft 13 according to the torsional deflection of torsion bar 14 To rotation；Rotation magnetic force circuit portion 32 is supported in output shaft 15, and according to the relative rotation of input shaft 13 and output shaft 15 And the size for the magnetic flux for being directed to a pair of of claw 63c, 64c from magnetic force generating unit 31 and direction is made to change.

In this configuration, rotation magnetic force circuit portion 32 makes according to the relative rotation of input shaft 13 and output shaft 15 from magnetic force Generating unit 31 is directed to the size of the magnetic flux of a pair of of claw 63c, 64c and direction changes.Therefore, magnetic force detection device 60 pairs of bases are applied in the torque of torsion bar 14 and changed magnetic flux density detects.Due to can be improved magnetic force detection Therefore the detection sensitivity of device 60 can reduce by the influence of the generations such as noise, so as to improve torque sensor 30 Detection accuracy.

In addition, electric power steering device 100 has: torque sensor 30；Motor 21, according to by torque sensor 30 torques detected and acted, thus make wheel 2 turn to.

In this configuration, motor 21 is acted according to the torque detected by torque sensor 30, to make vehicle Wheel 2 turns to.Therefore, wheel 2 is diverted according to the torque detected by torque sensor 30.Due to can be improved torque sensing Therefore the detection accuracy of device 30 can be such that wheel 2 turns to according to the torque being entered with higher precision.

More than, although embodiments of the present invention are illustrated, above embodiment illustrate only the present invention Application examples a part, technical scope of the invention is not defined in the meaning of the specific structure of above embodiment.

(1) magnetic force detection device 60 can also be used in the angle detected to the absolute rotation angle of steering shaft 11 In sensor.Torque sensor 30 can both sense for the torque angle detected to the absolute rotation angle of steering shaft 11 Device, or position sensor.

(2) in the above-described embodiment, through hole 61d runs through substrate 61, is internally provided with soft magnetism in through hole 61d Component 67.However, it is possible to for following structure, that is, substrate 61, which has, to be run through surface 61a and back side 61c and in substrate 61 The notch of outer peripheral surface upper opening is internally provided with soft magnetic member 67 in notch.That is, being formed on the through-Penetration portion of substrate 61 It can be notch.

(3) in the above-described embodiment, the entirety of soft magnetic member 67 is arranged at the inside of through hole 61d.But It can be come out for a part of soft magnetic member 67 from through hole 61d.Specifically, or following structure, that is, soft magnetism First opposed faces 67a of component 67 is located at the outside of through hole 61d, and soft magnetic member 67 is prominent towards sensor body 62a.Separately Outside, or with flowering structure, that is, the second opposed faces 67b of soft magnetic member 67 is located at the outside of through hole 61d, soft magnetism Component 67 is prominent towards claw 64c.That is, as long as at least part of soft magnetic member 67 is arranged at the inside of through hole 61d .

(4) in the above-described embodiment, soft magnetic member 67 in a manner of across interval and with 62a pairs of sensor body It sets.But soft magnetic member 67 can also be contacted with sensor body 62a.In this case, claw 63c and soft magnetic member The first magnetic gap G1 between 67 further becomes narrow.The leakage magnetic flux in the first magnetic gap G1 can be reduced, so as to improve magnetic The detection sensitivity of force checking device 60.Therefore, it can reduce the influence of external factor as noise, so as to improve magnetic The detection accuracy of force checking device 60.

(5) in the above-described embodiment, soft magnetic member 67 is opposed with claw 64c in a manner of across interval.But Soft magnetic member 67 can also be contacted with claw 64c.In this case, not formed between claw 64c and soft magnetic member 67 There is magnetic gap.Therefore, the leakage magnetic flux between a pair of of claw 63c, 64c can be reduced, so as to improve the inspection of magnetic force detection device 60 Survey sensitivity.Therefore, it can reduce the influence of external factor as noise, so as to improve the inspection of magnetic force detection device 60 Survey precision.

(6) in the above-described embodiment, soft magnetic member 67 have with through hole 61d same shape, and block Through hole 61d.But soft magnetic member 67 can also with unplugged through hole 61d, can also through hole 61d inner peripheral surface with Gap is formed between the outer peripheral surface of soft magnetic member 67.

(7) in the above-described embodiment, the manipulation generated to the manipulation torque realized by driver and by motor 21 is auxiliary The electric power steering device 100 for helping torque to be separately input to the double-pinion type of rack shaft 12 is illustrated. But the present invention may be, the manipulation torque realized by driver and the manipulation assist torque generated by motor 21 via Common steering shaft and the electric power steering device of the single pinion type that is input to rack shaft 12.In this case, it assists Mechanism 20 is arranged at output shaft 15.

(8) in the above-described embodiment, to motor 21 via worm shaft 22 and turbine 23 and with and rack shaft 12 nibble The connection of pinion shaft 24, torque sensor 30 and the assistance mechanism 20 of conjunction are configured in electric-powered near rack shaft 12 Transfer 100 is illustrated.But the present invention may be that output shaft 15 is engaged via jackshaft with rack shaft 12 Pinion shaft connection pillar electric power steering device.In addition, the present invention may be that steering wheel 1 and rack shaft 12 exist Steering-by-wire (the Stair by wire) formula not linked mechanically when abnormal by mechanically connection when usually Electric power steering device.

This application claims based on the preferential of the Patent 2017-078122 proposed on April 11st, 2017 to Japanese Patent Office Power, all the contents of the application by referring to mode and be incorporated into this specification.