CN101646931B - Torque detecting device - Google Patents
Torque detecting device Download PDFInfo
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- CN101646931B CN101646931B CN2008800099857A CN200880009985A CN101646931B CN 101646931 B CN101646931 B CN 101646931B CN 2008800099857 A CN2008800099857 A CN 2008800099857A CN 200880009985 A CN200880009985 A CN 200880009985A CN 101646931 B CN101646931 B CN 101646931B
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Abstract
A torque detecting device (16) is provided with first and second units (38, 39). The first unit (38) includes a first synthetic resin (40) formed by molding a pair of magnetic flux inducing rings (34A, 34B). The second unit (39) includes a second synthetic resin (41) fixed to a magnetic shield plate (37B) containing a metal; an inserting protruding section (44) arranged on the synthetic resin (41); and magnetic sensors (35A, 35B) held by the inserting protruding section (44). The first synthetic resin (40) includes a receiving plate (38a) whereupon a base (38e) for receiving the magnetic shield plate (37B) is formed. In a status where the receiving plate (38a) exists between the magnetic shield plate (37B) and an object (30) to be attached, both the magnetic shield plate (37B) and the receiving plate (38a) are fastened to the object (30) by a pair of fixing screws (32).
Description
Technical field
The present invention relates to torque master.
Background technology
Torque master for example has: by the input shaft and the output shaft of the coaxial binding of torsion bar; Be fixed on the permanent magnet of input shaft; Be configured in a plurality of yokes that constitute and be fixed on output shaft in the magnetic field of permanent magnet, by the soft-magnetic body that forms magnetic circuit; Induction is from a pair of ring concentrator of the magnetic flux of yoke; The Magnetic Sensor of the magnetic flux that detection is responded on ring concentrator.A pair of ring concentrator has the calvus of mutual arranged opposite respectively.Between a pair of calvus, dispose Magnetic Sensor (for example, with reference to patent documentation 1).
Patent documentation 1: TOHKEMY 2004-101277 communique.
Yet, sometimes such torque master is equipped on the driven steering device of automobile.Therefore, require the degree of freedom that operation is easy and raising designs of part replacement.
In addition, the magnetic force from the outside produces baneful influence to Magnetic Sensor sometimes.In order to prevent this situation, consider to have magnetic shield panel is set, but in this case, it is many that the parts number of packages becomes in above-mentioned unit.
Summary of the invention
The object of the present invention is to provide a kind of baneful influence and few torque master of parts number of packages that can suppress from the magnetic force of outside.
In order to realize described purpose, preferred implementation of the present invention provides a kind of torque master, and it is by detecting torque to the flux change that produces on a pair of soft-magnetic body in being disposed at the magnetic field of permanent magnet.Described torque master possesses: first and second unit; Be used for described first and second unit is installed on a pair of gib screw of mounting object, described first module comprises: with the described a pair of soft-magnetic body a pair of ring concentrator that closes of magnetic knot respectively; First synthetic resin of molded described a pair of ring concentrator.Described Unit second comprises: the magnetic shield panel that contains metal; Be fixed on second synthetic resin of described magnetic shield panel; Be arranged on the part of described second synthetic resin and the insertion protuberance of giving prominence to from described magnetic shield panel; Remain on the Magnetic Sensor of described insertion protuberance.Described first synthetic resin has receiving plate, and this receiving plate is formed with the seat that bears described magnetic shield panel, and described a pair of ring concentrator has opposed mutually at least one pair of collection magnetic projection.The described Magnetic Sensor that remains on described insertion protuberance is inserted in the insertion recess that forms between described collection magnetic projection.Described a pair of gib screw is separated from each other, and described insertion protuberance is configured between the described a pair of gib screw.Under described receiving plate is folded in state between described magnetic shield panel and the described mounting object,, described magnetic shield panel and described receiving plate are anchored on described mounting object jointly by described a pair of gib screw.
According to this programme, by described a pair of gib screw, described magnetic shield panel and described receiving plate are anchored on described mounting object jointly, therefore can reduce the parts number of packages, consequently, can reduce manufacturing cost.In addition, under the effect of magnetic shield panel, can suppress influence from the magnetic force of outside.
Description of drawings
Fig. 1 is the summary construction diagram of driven steering device that has been suitable for the torque master of one embodiment of the present invention.
Fig. 2 is the exploded perspective view of pick-up unit shown in Figure 1.
Fig. 3 is the exploded perspective view of major part of the torque master of Fig. 2.
Fig. 4 A～Fig. 4 C is the synoptic diagram of action that is used for the torque master of key diagram 2, and Fig. 4 D is illustrated in the chart of the relation of the torsion angle that produces between input shaft and the output shaft and magnetic flux density.
Fig. 5 is the sectional view of the torque master of Fig. 2, is equivalent to along the cross section of the S5-S5 line of Fig. 6.
Fig. 6 is the sectional view along the S6-S6 line of Fig. 5.
Fig. 7 is the amplification profile of major part of the torque master of another embodiment of the present invention.
Fig. 8 is illustrated in the torque master of Fig. 7, the process chart of the state before Magnetic Sensor is installed.
Fig. 9 is the enlarged drawing of major part of the torque master of another embodiment of the invention.
Figure 10 is the enlarged drawing of the major part of the torque master of an embodiment more of the present invention.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are at length described.In the present embodiment, the situation that torque master is applicable to the driven steering device of automobile is illustrated, but torque master also can be applicable to driven steering device device or equipment in addition.
Fig. 1 is the synoptic diagram of schematic configuration of the driven steering device of the expression torque master that has been suitable for one embodiment of the present invention.With reference to Fig. 1, driven steering device 1 has: steering axle 4, and it is in order to handle deflecting roller 2, and transmission is applied to as the manipulation torque on the steering wheel 3 of control member; Catanator, it is made of for example pinion and rack that is used at the effect lower-pilot deflecting roller 2 of the manipulation torque of steering axle 4.In addition, driven steering device 1 has the intermediate shaft unit 6 as shaft coupling, and described intermediate shaft unit 6 is arranged between steering axle 4 and the catanator 5, is used for transmitting between steering axle 4 and catanator 5 rotation.
Steering axle 4 is bearing in steering column 7 and rotates freely.Steering column 7 is bearing in car body 9 via carriage 8.Steering wheel 3 is connected with an end of steering axle 4.Intermediate shaft unit 6 links with the other end of steering axle 4.Intermediate shaft unit 6 has as the power transmission shaft 10 of intermediate shaft and universal joint 11,12.
The rack housing 15 of the tooth bar 14 as steering axle, supporting gear axle 13 and tooth bar 14 that catanator 5 has gear shaft 13, extend to the left and right directions (with the direction of working direction quadrature) of automobile.The gear teeth 13a of gear shaft 13 and the rack tooth 14a of tooth bar 14 are meshing with each other.Each end of tooth bar 14 is via track rod and knuckle arm (not shown) and corresponding deflecting roller 2 bindings.
If handle steering wheel 3, then handle torque and transmit via steering axle 4, intermediate shaft unit 6 longitudinal controllers 5.Can handle deflecting roller 2 thus.
Driven steering device 11 obtains steering auxiliary force according to handling torque.That is, driven steering device 1 has: detect to handle the torque master 16 of torque, as the ECU (Electronic Control Unit electronic control unit) 17 of control part, handle the electro-motor 18 of auxiliary usefulness, as the speed reduction unit 19 of toothed gearing.In the present embodiment, torque master 16, electro-motor 18 and speed reduction unit 19 and steering column 7 related settings.
Steering column 7 has column tube 20, housing 21.Housing 21 is accommodated at least a portion of supporting torque master 16, and supporting electro-motor 18, in addition, constitutes the part of speed reduction unit 19.
Steering axle 4 has input shaft 22, output shaft 23 and torsion bar 24 as the direction of principal axis bottom, has coupling shaft 25 as direction of principal axis top.Output shaft 22 and output shaft 23 interconnect on same axis via torsion bar 24.Input shaft 22 links to each other with steering wheel 3 via coupling shaft 25.Output shaft 23 links to each other with intermediate shaft unit 6.When torque is handled in input shaft 22 inputs, the elastic torsion distortion takes place in torsion bar 24, and thus, input shaft 22 and output shaft 23 rotate relatively.
The torsion bar 24 related settings of torque master 16 and steering axle 4 detect torque according to the relative swing offset amount via 23 of the input shaft 22 of torsion bar 24 and output shafts.Give ECU17 with the torque detection architecture.
The speed of a motor vehicle testing result that ECU17 applies according to above-mentioned torque testing result with from not shown vehicle speed sensor etc., control electro-motor 18.Speed reduction unit 19 has worm shaft 26 that drives by electro-motor 18 and the worm gear 27 that meshes with this worm shaft 26.Worm gear 27 interfixes with output shaft 23, thus the one rotation.
If operation steering wheel 3 then detects by torque master 16 and handles torque, produce steering auxiliary force according to electro-motors such as torque testing result and speed of a motor vehicle testing result 18.Steering auxiliary force passes to catanator 5 via speed reduction unit 19.Meanwhile, the action of steering wheel 3 also passes to catanator 5.Its result, assisted control when handling wheel 2.
Fig. 2 is the exploded perspective view of the torque master 16 of Fig. 1.Fig. 3 is the exploded perspective view of major part of the torque master 16 of Fig. 2.Fig. 4 A～Fig. 4 C is the synoptic diagram of action that is used for the torque master 16 of key diagram 2, and Fig. 4 D is the chart that is illustrated in the relation of the torsion angle that produces between input shaft 22 and the output shaft 23 and magnetic flux density.Fig. 5 is the sectional view of the torque master 16 of Fig. 2, is equivalent to along the cross section of the S5-S5 line of Fig. 6.Fig. 6 is the sectional view along the S6-S6 line of Fig. 5.
With reference to Fig. 2, Fig. 5, Fig. 6, the torque master 16 of present embodiment has described input shaft 22, output shaft 23, torsion bar 24, have permanent magnet 28 and form parts as the magnetic circuit that forms magnetic circuit, thereby described magnetic circuit is meant according to the magnetic circuit that acts on the torque flux change on these each parts 22,23,24 to have pair of magnetic yoke 29A, 29B as soft-magnetic body.
Torque master 16 has: as the sensor housing 30 of mounting object; Be installed in the fixation side unit 31 of this sensor housing 30; Be used for this fixation side unit 31 is fixed in two gib screws 32 as fixed part of sensor housing 30.Described gib screw 32 is spaced from each other configuration.In addition, torque master 16 have the seal member 33A of the ring-type between seal sensor housing 30 and the fixation side unit 31, at the seal member 33B of the ring-type of the inner sealing of fixation side unit 31.
Sensor housing 30 forms tubular as the part of described housing 21, has empty 30a in inside.The sidepiece 30d of sensor housing 30 has the formation periphery and is communicated with inside and outside intercommunicating pore 30b.Be formed with the construction opening 30e and the installed surface 30c that is used to install and fix side unit 31 of intercommunicating pore at sidepiece 30d.
Installed surface 30c is formed at the tabular surface of the ring-type of surrounding construction opening 30e.The inboard of this tabular surface and the profile in the outside are forming the roughly rectangular shape of extending to the direction vertical with axial S when radially R observes.Be formed with along the edge portion of construction opening 30e at installed surface 30c and accommodate the end difference 30f of the ring-type of seal member 33A, two threaded hole 30g of gib screw 32 usefulness.The empty 30a of each threaded hole 30g and sensor housing 30 is independent, forms the specified length at the end.In addition, also can go up formation installed surface 30c at the miscellaneous part that is fixed in sensor housing 30 (not shown).
In the following description, with the axial S of steering axle 4, radially R and circumferential T are called axial S, radially R and circumferential T respectively separately.These axial S, radially R and circumferential T also are corresponding with input shaft 22, output shaft 23, permanent magnet 28, yoke 29A, 29B and ring concentrator 34A, 34B respectively axially, radially reaching circumferentially.In addition, the directions that link mutually of the first module 38 that is fixation side unit 31 with a direction among the R radially and second unit 39 are called link direction RP.
In addition, second unit 39 has main part 39c and flange 39b.In addition, has the end 39a that is configured in close first module 38 with respect to link direction RP.
The part of second synthetic resin 41 is configured in the outside of through hole 37c in the both sides of link direction RP, compare enlarged-diameter with this through hole 37c adjacency and with through hole 37c.In addition, magnetic shield panel 37B when bearing the axle power of gib screw 32 screw threads when chimeric, with under the effect of this power, do not produce the thickness t of distortion, for example the thickness of 2～4mm forms.
In Magnetic Sensor 30, contain permanent magnet 28 and pair of magnetic yoke 29A, 29B.In addition, the first module 38 and second unit 39 link side by side and mutually along the radially R of steering axle 4.First module 38 is by the construction opening 30e of the intercommunicating pore 30b of sensor housing 30, and the footpath that is configured in steering axle 4 relatively is inwardly square.Ring concentrator 34A, 34B as the annulus 38c of the part of first module 38 are outstanding to the inside of sensor housing 30.Second unit 39 is configured in the radially foreign side of steering axle 4 relatively and is configured in the outside of sensor housing 30.
In the present embodiment, the flange 38b of the receiving plate 38a of first module 38 is installed in the installed surface 30c of sensor housing 30, and the flange 39b of second unit 39 is via the flange 38b of first module 38, the installed surface 30c that fixes to be installed in sensor housing 30 by two gib screw 32 screw threads.Gib screw 32 is fastening jointly with the flange 39b of the flange 38b of first module 38 and second unit 39.
With reference to Fig. 2 and Fig. 5, permanent magnet 28 forms drums, and concentric and one is fixed on input shaft 22 rotatably with input shaft 22.In the periphery of permanent magnet 28, with a plurality of magnetic poles, for example 24 utmost points (N, S each 12 utmost points) along circumferential T with uniformly-spaced magnetization.
Each yoke 29A, 29B forms drum, surrounds permanent magnet 28 from foreign side radially in non-contacting mode, and is configured in the magnetic field that permanent magnet 28 forms, and closes with permanent magnet 28 magnetic knots thus.The mutual noncontact of pair of magnetic yoke 29A, 29B and can not fixing with relatively moving, and concentric and one is fixing rotatably with output shaft 23.Constitute pair of magnetic yoke 29A, 29B as follows, that is, if change with respect to the relative position of yoke 29A, the 29B of circumferential T and permanent magnet 28, the change in magnetic flux density that produces in the magnetic circuit that forms by yoke 29A, 29B and permanent magnet 28 then.
With reference to Fig. 2, Fig. 3, Fig. 5, each yoke 29A, 29B have the ring 29a of circular plate shape and a plurality of, 12 the pawl 29b for example that uniformly-spaced erect from the interior perimembranous of the plate face of this ring 29a.The ring 29a of two yoke 29A, 29B separates predetermined distance and opposed mutually each other on axial S, and concentric arrangement mutually.The pawl 29b of two yoke 29A, 29B is outstanding to the close mutually direction of axial S each other, and staggers mutually at circumferential T, thus alternately evenly configuration.Under this state, by synthetic resin 42 molded integratedly two yoke 29A, 29B.Drip molding after molded constitutes drum.
With reference to Fig. 3, Fig. 5, Fig. 6, two ring concentrator 34A, 34B close with corresponding yoke 29A, 29B magnetic knot respectively, and the magnetic flux of self- corresponding yoke 29A, 29B is responded to respectively on Magnetic Sensor 35A, 35B in the future.Two ring concentrator 34A, 34B constitute ring-types, and are concentric with the periphery of corresponding yoke 29A, 29B and surround from foreign side radially non-contactly.
Each ring concentrator 34A, 34B have the main part 341 of ring-type and a pair of calvus 342 as collection magnetic projection that extends to foreign side from these main part 341 radius vectors.Two calvus 342 form identical shape mutually, and are spaced from each other configuration at circumferential T.Two mutual noncontacts of ring concentrator 34A, 34B and fix at following state.It is right that the calvus 342 of a ring concentrator 34A and the calvus 342 of another ring concentrator 34B are in, and extend to approaching mutually direction, and S is opposed vertically.Identical therewith, it is right that another calvus 342 of a ring concentrator 34A and another calvus 342 of another ring concentrator 34B are in.At paired calvus 342 each other, be used as inserting recess 43 in the gap that axial S vacates ormal weight.Under this state, a pair of ring concentrator 34A, 34B are molded and integrated by first synthetic resin 40. Ring concentrator 34A, 34B close via calvus 343 mutual magnetic knots.
A pair of Magnetic Sensor 35A, 35B are arranged side by side at circumferential T.As shown in Figure 5, each Magnetic Sensor 35A, 35B are made of the Hall IC that comprises test section 50 as Hall element.Test section 50 covers by exterior material, and is electrically connected with circuit substrate 36.Each Magnetic Sensor 35A, 35B insert between the corresponding a pair of calvus 342.
The Hall element that constitutes described test section 50 utilizes following Hall effect,, makes the sense of current bending under the effect in magnetic field that is, produces voltage in the direction with magnetic field and sense of current quadrature thus.
With reference to Fig. 1, Fig. 6, circuit substrate 36 signal from Magnetic Sensor 35A, 35B input is applied the signal Processing of regulation, thereby the signal after will handling is exported to ECU17 to Magnetic Sensor 35A, 35B power supply.Circuit substrate 36 for example has circuit block, printing distributing board, assembles these parts and forms.
With reference to Fig. 4 B and Fig. 5, be under the neutral condition that acts between input shaft 22 and the output shaft 23 in torque, the front end of each pawl 29b of yoke 29A, 29B is meant the border of the N utmost point and the S utmost point of permanent magnet 28.At this moment, in each pawl 29b of yoke 29A, 29B, equate with the extremely opposed area of the N of permanent magnet 28 with the extremely opposed area of S, therefore, its result, the magnetic flux that enters from the N utmost point and equate to the magnetic flux of S utmost point output does not produce magnetic flux between pair of magnetic yoke 29A, 29B.Therefore, Magnetic Sensor 35A, 35B do not detect magnetic flux.
With reference to Fig. 4 A, Fig. 5, when the torque of a direction is between input shaft 22 and output shaft 23, on torsion bar 24, produces and reverse, each the pawl 29b of pair of magnetic yoke 29A, 29B and the relative position of permanent magnet 28 change.
At this moment, in each pawl 29b of a side yoke 29A, with the extremely opposed area of the N of permanent magnet 28 greater than with the extremely opposed area of the S of permanent magnet 28, in a side yoke 29A, the magnetic flux that enters from the N utmost point is greater than the magnetic flux to the output of the S utmost point.In each pawl 29b of the opposing party's yoke 29B, with the extremely opposed area of the N of permanent magnet 28 less than with the extremely opposed area of the S of permanent magnet 28, in another yoke 29B, the magnetic flux that enters from the N utmost point is less than the magnetic flux to the output of the S utmost point.
The magnetic flux that will produce on each yoke 29A, 29B is responded to respectively by ring concentrator 34A, the 34B of correspondence.Its result, produce from the calvus 342 of the ring concentrator 34A corresponding with a side yoke 29A to the magnetic flux of the calvus 342 of the corresponding ring concentrator 34B of the opposing party's yoke 29B.Detect this magnetic flux by Magnetic Sensor 35A, 35B.
With reference to Fig. 4 C, Fig. 5, on the other hand, when the torque of other direction is between input shaft 22 and output shaft 23, opposite with the situation of the torque of a described direction, each the pawl 29b of pair of magnetic yoke 29A, 29B and the relative position of permanent magnet 28 are to changing inversely, in each yoke 29A, 29B, produce magnetic flux in the other direction.Its result, produce from the calvus 342 of the ring concentrator 34B corresponding with another yoke 29B to the magnetic flux of the calvus 342 of the corresponding ring concentrator 34A of yoke 29A, and detect this magnetic flux.
With reference to Fig. 4 D, Fig. 5.In Fig. 4 D,, and illustrate some label symbol 4A, 4B, the 4C of the relation of the torsion angle of the expression torsion bar 24 corresponding and magnetic flux density with each state of Fig. 4 A, Fig. 4 B and Fig. 4 C.In the scope of the torsion angle of the torsion bar 24 that reality is used, in the magnetic flux density that produces between the paired calvus 342 of a pair of ring concentrator 34A, 34B and each pawl 29b at each yoke 29A, 29B with the extremely opposed area of N and proportional with the difference of the extremely opposed area of S, this difference is proportional with the torsion angle of torsion bar 24, and then, and act on being in proportion of torque between input shaft 22 and the output shaft 23.That is,, can obtain torque according to detected magnetic flux density.In addition, by ring concentrator 34A, 34B, Magnetic Sensor 35A, 35B can detect the mean value in the magnetic flux density of the complete cycle generation of yoke 29A, 29B.
With reference to Fig. 2, Fig. 5, Fig. 6, in the present embodiment, fixation side unit 31 is divided into the first module 38 and second unit 39.First module 38 constitutes as different parts mutually with second unit 39, mutual mechanical link on described link direction RP, and can be separated from each other as required.
The receiving plate 38a of first module 38 has: as the seat 38e of the installation portion of magnetic shield panel 37B; The chimeric recess 38f of the recess that surrounds on the present 38e; From the outstanding a pair of recess formation 38g of portion in the end of chimeric recess 38f; Be installed in the face that the is mounted 38h of the installed surface 30c of sensor housing 30; Two gib screws 32 are inserted two logical screw insertion hole 38i respectively.
Be mounted face 38h and constitute by the tabular surface circlewise of the rectangle of the annulus 38c that surrounds first module 38, and be formed on the side's of flange 38b face, promptly on the face at the rear side place of a 38e, with opposed the joining of installed surface 30c of sensor housing 30.
Screw insertion hole 38i connects and is mounted face 38h and seat 38e, and is spaced from each other the both sides that are configured in across chimeric recess 38f.
Each recess formation 38g of portion comprises the part of two calvus 343 and first synthetic resin 40 of corresponding ring concentrator 34A, 34B.
The end 39a of second unit 39 has: be smooth and form the face that the is mounted 39h of ring-type on a side the face of magnetic shield panel 37B at the end face of end 39a; From the outstanding fitting projection 39f of end face; Detect the insertion protuberance 44 of usefulness from the outstanding magnetic flux of the end face of this fitting projection 39f; With insert protuberance 44 with two side-prominent guiding protuberance 39g.Insert the part that protuberance 44 comprises a pair of Magnetic Sensor 35A, 35B and second synthetic resin 41.Described insertion protuberance 44 is configured between the described a pair of gib screw 32.
Two guiding are configured in the part of close periphery of the end face of fitting projection 39f with protuberance 39g, are configured in across the mutual opposition side that inserts protuberance 44 with respect to axial S, and along the linearly extension of link direction RP.Contact with the inner peripheral surface of chimeric recess 38f with protuberance 39g by guiding, come the channeling conduct that relatively moves the first module 38 and second unit 39.
Gib screw 32 has head 32a, compare with head 32a path and from the head 32a extend axial region 32b, be formed on the external thread of the front end of axial region 32b.Gib screw 32 is inserted the screw insertion hole 37a that leads in second unit 39, and inserts the screw insertion hole 38i that leads in first module 38, and the female screw of the pin thread of the front end of the plug in gib screw 32 that leads to and the threaded hole 30g of sensor housing 30 is chimeric.
The flange 38b of the receiving plate 38a of first module 38 is installed at the installed surface 30c of sensor housing 30.The magnetic shield panel 37B screw thread of second unit 39 is fixed on the seat 38e of first module 38 along the face that the is mounted 39h of second unit 39.
The fitting projection 39f of the end 39a of second unit 39 is entrenched in the chimeric recess 38f of the receiving plate 38a of first module 38.By making chimeric recess 38f and fitting projection 39f chimeric mutually, and the first module 38 and second the relatively moving of unit 39 with respect to circumferential T and axial S are limited.
The torque master 16 of present embodiment possesses: first module 38, its by first synthetic resin 40 molded respectively with corresponding yoke 29A, a pair of ring concentrator 34A, the 34B that the 29B magnetic knot closes as soft-magnetic body, and be installed on sensor housing 30 as the mounting object parts; Second unit 39, it utilizes second synthetic resin, 41 molded Magnetic Sensor 35A, 35B and forms.
Receiving plate 38a is folded between described magnetic shield panel 37B and the sensor housing 30.Under this state, insert the logical a pair of gib screw 32 that is formed on the pair of screws inserting hole 37a of magnetic shield panel 37B respectively and insert the pair of screws inserting hole 38i that leads at the receiving plate 38a that is formed at first module 38.And then, by described a pair of gib screw 32 is screwed in the threaded hole 30g that is arranged on sensor housing 30, and second unit 39 and first module 38 are anchored on sensor housing 30 jointly.
According to present embodiment, under the effect of described a pair of gib screw 32, magnetic shield panel 37B and the common screw thread of receiving plate 38a are fixed in sensor housing 30, therefore, can reduce the parts number of packages, its result can reduce manufacturing cost.In addition, under the effect of magnetic shield panel 37B, can suppress influence from the magnetic force of outside.
By metal magnetic shield panel 37B, particularly, bear the head 32a of gib screw 32 by the circumference of screw insertion hole 37a.Therefore, the metallic parts (not shown) that do not need to be provided for separately to bear gib screw 32 in second unit 39 get final product.Its result can reduce manufacturing cost.
In addition, magnetic shield panel 37B is installed on second unit 39 when the shaping of second synthetic resin 41 of second unit 19.In this case, do not need to be provided with separately the parts that magnetic shield panel 37B is fixed in second unit 39 and get final product, therefore can reduce manufacturing cost.
In addition, owing to the first module 38 that comprises ring concentrator 34A, 34B and second unit 39 that comprises Magnetic Sensor 35A, 35B constitute as unit independently mutually, therefore for example when needs are changed Magnetic Sensor 35A, 35B, can only change second unit 39 that comprises Magnetic Sensor 35A, 35B, not get final product and do not change first module 38.
This be because, insert in first module 38 and to be connected with steering axles 4, therefore in order to change first module 38, need to decompose steering column 7 and extract steering axle 4, the replacing of first module 38 expends time in.Thus, can be economical and change Magnetic Sensor 35A, 35B in short time.In addition, only change first module 38, economical too.
In addition, by fixation side unit 31 being divided into the first module 38 that comprises ring concentrator 34A, 34B and comprising second unit 39 of Magnetic Sensor 35A, 35B, the global design degree of freedom of torque master 16 improves, and therefore this torque master 16 easily can be applicable to multiple equipment or device.
In addition, owing to be provided with magnetic shield panel 37A, 37B, therefore the output signal of Magnetic Sensor 35A, 35B is not vulnerable to the baneful influence of outside magnetic force, and its result can suppress the situation that the response of output signal reduces under the effect of the filtrator that is used to suppress this baneful influence.Therefore, can improve the manipulation sense of driven steering device 1.
In addition, the insertion protuberance 44 that comprises a pair of Magnetic Sensor 35A, 35B is configured in a pair of guiding with between the protuberance 39g.Thus, when assembling first module 38 and Unit 39 second, that is, when fitting projection 39f being inserted in chimeric recess 38f, can prevent the situation of Magnetic Sensor 35A, 35B breakage.Its result can reduce the disqualification rate of product, and boost productivity.
Next, Fig. 7 and Fig. 8 represent another embodiment of the present invention.Present embodiment disposes Magnetic Sensor 35A as shown in Figure 7 between a pair of calvus 342 as collection magnetic projection.Between the opposed faces of each calvus 342 and Magnetic Sensor 35A, be folded with railway grease 61 as magnetic part with magnetic.In railway grease 61, sneak into for example powder of soft magnetism system such as ferrite dust.
The magnetic flux that focuses at the front end of calvus 342 imports to Magnetic Sensor 35A via magnetic part 61.Owing to have magnetic as the railway grease 61 of magnetic part, therefore the magnetic flux that focuses at the front end of calvus 342 can spill hardly towards periphery, thus the Magnetic Sensor 35A by magnetic part 61 butts.Its result owing to increase by the magnetic flux of test section 50, therefore can carry out high-precision torque and detect.
As shown in Figure 8, after on the two sides that will be coated in Magnetic Sensor 35A as the railway grease 61 of magnetic part, shown in hollow arrow, be inserted in the chimeric recess 38f of first module 38 by the fitting projection 39f of second unit 39, and Magnetic Sensor 35A easily can be configured between a pair of calvus 342.That is, after railway grease 61 is coated in Magnetic Sensor 35A, by second unit 39 is installed on first module 38, and Magnetic Sensor 35A easily is assembled between a pair of calvus 342.
In addition, as shown in Figure 9, magnetic part also can use the hardening resin 62 of the powder of sneaking into soft magnetism systems such as ferrite dust.In this case, after second unit 39 is installed on first module 38,, and make hardening resin 62 sclerosis by heating or ultraviolet ray irradiation.In the embodiment of Fig. 9,, also can between calvus 342 and Magnetic Sensor 35A, keep hardening resin 62 reliably as magnetic part even in the condition of high temperature or apply under the environment for use of vibration.Therefore, can stablize and carry out accurately the detection of torque.
Next, Figure 10 represents another embodiment of the invention.In the present embodiment, use is as a pair of rubber parts 63 with magnetic of magnetic part.Rubber parts 63 with magnetic for example is to contain the rubber parts of powder of magnetic system or the rubber parts of iron powder that surface insulation is covered.Each rubber parts 63 is installed in the leading section of corresponding calvus 342 respectively.
The conical surface 63a that comprises mutual reverse inclination across the opposed faces of the opposed a pair of rubber parts 63 of Magnetic Sensor 35A.The conical surface 63a of a pair of rubber parts 63 is approaching mutually according to the direction of insertion of Magnetic Sensor 35A.Magnetic Sensor 35A is by described conical surface 63a guiding, and is inserted between the rubber parts 63 as magnetic part.By resilient clamp Magnetic Sensor 35A between a pair of rubber parts 63 immediate teat 63b, and Magnetic Sensor 35A is packed between a pair of calvus 342.
In the present embodiment, the position of the test section 50 by adjusting Magnetic Sensor 35A and as the position of the teat 63b of a pair of rubber parts 63 of magnetic part, the flux concentrating that makes the teat 63b that focuses on the rubber parts 63 with magnetic via the front end of calvus 342 thus is at test section 50.Therefore, can further increase magnetic flux, thereby further precision is found the solution torque well by test section 50.
In addition, used the rubber-like rubber parts as magnetic part, therefore, by Magnetic Sensor 35A being inserted between a pair of rubber parts 63 as magnetic part, and can under establishing state as the rubber parts 63 of magnetic part, easily realize by folder the assembling of Magnetic Sensor 35A.In addition, also can easily carry out the dismounting of Magnetic Sensor 35A.
In addition, in described each embodiment, can consider following variation.
For example, gib screw 32 also can connect sensor housing 30 and be chimeric with nut thread.In addition, also there is the situation that permanent magnet 28 is fixed on output shaft 23 and pair of magnetic yoke 29A, 29B is fixed on output shaft 22.
More than, by concrete mode the present invention at length is illustrated, but the those skilled in the art that understood foregoing can easily consider its change, change and equivalent.Therefore, the present invention should comprise scope of claims and the scope that is equal to it.
Propose in the Japan special permission Room in the application and on March 29th, 2007 patented claim 2007-087971 number and patented claim 2007-93386 number of proposing in the Japan special permission Room on March 30th, 2007 are corresponding, introduce the disclosure of these applications here by reference.
Claims (9)
1. torque master, it is by detecting torque to the flux change that produces on a pair of soft-magnetic body in being disposed at the magnetic field of permanent magnet, and described torque master possesses:
First and second unit;
Be used for described first and second unit is installed on a pair of gib screw of mounting object,
Described first module comprises: with the described a pair of soft-magnetic body a pair of ring concentrator that closes of magnetic knot respectively; First synthetic resin of molded described a pair of ring concentrator,
Described Unit second comprises: the magnetic shield panel that contains metal; Be fixed on second synthetic resin of described magnetic shield panel; Be arranged on the part of described second synthetic resin and the insertion protuberance of giving prominence to from described magnetic shield panel; Remain on the Magnetic Sensor of described insertion protuberance,
Described first synthetic resin has receiving plate, and this receiving plate is formed with the seat that bears described magnetic shield panel, and described a pair of ring concentrator has the main part of ring-type and a pair of calvus as collection magnetic projection that extends to foreign side from this main part radius vector respectively; Two calvus form identical shape mutually, and circumferentially are spaced from each other configuration in the steering axle of driven steering device; Two mutual noncontacts of ring concentrator and fix at following state: it is right that a calvus of a calvus of a ring concentrator and another ring concentrator is in, and extend to approaching mutually direction, and axially opposed along described steering axle; It is right that another calvus of a ring concentrator and another calvus of another ring concentrator are in, and extend to mutually approaching direction, and axially opposed along described steering axle,
The described Magnetic Sensor that remains on described insertion protuberance is inserted in the insertion recess that forms between described collection magnetic projection,
Described a pair of gib screw is separated from each other,
Described insertion protuberance is configured between the described a pair of gib screw,
Under described receiving plate is folded in state between described magnetic shield panel and the described mounting object,, described magnetic shield panel and described receiving plate are anchored on described mounting object jointly by described a pair of gib screw.
2. torque master according to claim 1 is characterized in that,
Described a pair of gib screw respectively the correspondence by being formed at described magnetic shield panel screw insertion hole and be formed at the screw insertion hole of the correspondence of described receiving plate, be screwed in the threaded hole of correspondence of described mounting object.
3. torque master according to claim 1 is characterized in that,
Described a pair of gib screw has head respectively,
The head separately of described a pair of gib screw is born by described magnetic shield panel.
4. torque master according to claim 1 is characterized in that,
As the result of the injection molded operation of described second synthetic resin, described magnetic shield panel is fixed on described second synthetic resin.
5. torque master according to claim 1 is characterized in that,
Described Unit second comprises the guiding protuberance that the described Unit second of guiding is installed to described first module,
Described insertion protuberance and described guiding are outstanding to same direction with protuberance.
6. according to each described torque master in the claim 1～5, it is characterized in that,
Between each described collection magnetic projection and described Magnetic Sensor, be folded with magnetic part.
7. torque master according to claim 6 is characterized in that,
Described magnetic part comprises the railway grease of sneaking into the powder that is magnetic.
8. torque master according to claim 6 is characterized in that,
Described magnetic part comprises the hardening resin of sneaking into the powder that is magnetic.
9. torque master according to claim 6 is characterized in that,
Described magnetic part comprises a plurality of rubber parts of sneaking into the powder that is magnetic,
Each described rubber parts is installed in corresponding collection magnetic projection,
Each described rubber parts and described Magnetic Sensor Elastic Contact.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007087971A JP4997474B2 (en) | 2007-03-29 | 2007-03-29 | Torque detection device |
| JP087971/2007 | 2007-03-29 | ||
| JP2007093386A JP4905792B2 (en) | 2007-03-30 | 2007-03-30 | Torque detection device |
| JP093386/2007 | 2007-03-30 | ||
| PCT/JP2008/056159 WO2008120739A1 (en) | 2007-03-29 | 2008-03-28 | Torque detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101646931A CN101646931A (en) | 2010-02-10 |
| CN101646931B true CN101646931B (en) | 2011-11-09 |
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ID=39974514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800099857A Expired - Fee Related CN101646931B (en) | 2007-03-29 | 2008-03-28 | Torque detecting device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4997474B2 (en) |
| CN (1) | CN101646931B (en) |
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| CN103287492A (en) * | 2012-02-28 | 2013-09-11 | 株式会社捷太格特 | Torque detection device, method of manufacturing torque detection device, and electric power steering system |
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| KR101020447B1 (en) | 2009-03-23 | 2011-03-08 | 대성전기공업 주식회사 | Non-contacting type torque sensor for steering system |
| DE102010033769A1 (en) * | 2010-08-09 | 2012-02-09 | Valeo Schalter Und Sensoren Gmbh | Device with a torque sensor and a rotation angle sensor |
| US8448528B2 (en) * | 2010-09-27 | 2013-05-28 | Bourns Incorporated | Three-piece torque sensor assembly |
| JP5883611B2 (en) * | 2011-10-13 | 2016-03-15 | 株式会社ショーワ | Relative angle detection device and method of manufacturing relative angle detection device |
| JP5843099B2 (en) * | 2011-11-08 | 2016-01-13 | 株式会社ジェイテクト | Torque detection device and electric power steering device |
| JP5563549B2 (en) * | 2011-12-16 | 2014-07-30 | 株式会社デンソー | Torque sensor |
| DE102012200244A1 (en) * | 2012-01-10 | 2013-07-11 | Robert Bosch Gmbh | sensor arrangement |
| JP5994264B2 (en) * | 2012-02-01 | 2016-09-21 | 株式会社ジェイテクト | Torque detection device and manufacturing method thereof |
| US9771096B2 (en) | 2012-09-14 | 2017-09-26 | Yamaha Hatsudoki Kabushiki Kaisha | Relative rotational angular displacement detection device having a magnetic detection unit that detects a magnetic flux of an annular plane portion from a surface of a ring body |
| TWI499759B (en) | 2012-09-14 | 2015-09-11 | Yamaha Motor Co Ltd | Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle |
| US20140076656A1 (en) | 2012-09-14 | 2014-03-20 | Yamaha Hatsudoki Kabushiki Kaisha | Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle |
| KR101842754B1 (en) * | 2012-09-18 | 2018-03-27 | 히타치 오토모티브 시스템즈 스티어링 가부시키가이샤 | Torque sensor |
| JP6031960B2 (en) * | 2012-11-20 | 2016-11-24 | 株式会社ジェイテクト | Steering device |
| DE102012024383A1 (en) * | 2012-12-13 | 2014-06-18 | Valeo Schalter Und Sensoren Gmbh | Device having a torque sensor device and a steering angle sensor device for a motor vehicle, motor vehicle and method for producing a device |
| JP6056458B2 (en) * | 2012-12-25 | 2017-01-11 | 株式会社ジェイテクト | Torque detection device and steering device including the same |
| JP6171694B2 (en) * | 2013-08-02 | 2017-08-02 | 株式会社ジェイテクト | Torque detection device and electric power steering device |
| JP6489746B2 (en) * | 2014-03-04 | 2019-03-27 | 山洋電気株式会社 | Magnetic shield cover for magnetic detection encoder and magnetic detection encoder |
| US9547049B2 (en) * | 2014-04-22 | 2017-01-17 | Gm Global Technology Operations, Llc | Automotive magnetic shield |
| US10067015B2 (en) * | 2014-08-28 | 2018-09-04 | Ls Automotive Technologies Co., Ltd. | Torque sensor device |
| JP5814443B2 (en) * | 2014-09-04 | 2015-11-17 | 株式会社日本自動車部品総合研究所 | Torque sensor |
| JP6665668B2 (en) * | 2016-04-28 | 2020-03-13 | 株式会社ジェイテクト | Torque detector |
| WO2020004161A1 (en) | 2018-06-28 | 2020-01-02 | 株式会社デンソー | Magnetic detection module, detection device, case assembly, and production method for magnetic detection module |
| JP6908014B2 (en) * | 2018-06-28 | 2021-07-21 | 株式会社デンソー | Manufacturing method of magnetic detector module, detector, case assembly, and magnetic detector module |
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| CN103287492A (en) * | 2012-02-28 | 2013-09-11 | 株式会社捷太格特 | Torque detection device, method of manufacturing torque detection device, and electric power steering system |
| CN103287492B (en) * | 2012-02-28 | 2016-12-28 | 株式会社捷太格特 | Torque detecting apparatus and manufacture method, driven steering device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008249366A (en) | 2008-10-16 |
| JP4997474B2 (en) | 2012-08-08 |
| CN101646931A (en) | 2010-02-10 |
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