JP5518767B2 - Detection rotor, rotation detector and its mounting structure - Google Patents

Description

  The present invention relates to a detection rotor, a rotation detector, and a mounting structure for the motor, which are used for detecting rotation of a rotating shaft such as a motor.

  Conventionally, as this type of technology, for example, a sheet coil resolver described in Patent Document 1 below is known. The resolver includes two sheet coils formed by forming a coil pattern on the surface of a disk-shaped substrate made of a resin, and is configured so that the two sheet coils are opposed to each other through a gap. . Here, one of the two sheet coils is the detection phase side, the other is the excitation phase side, the detection phase side sheet coil is fixed to the tip of the rotating shaft, and the excitation phase side sheet coil is fixed to the bracket. .

JP-A-9-229715

  However, the resolver described in Patent Document 1 is configured so that the resin-made substrate is fixed to the rotation shaft as it is for the detection-side sheet coil. It is considered difficult to ensure the reliability of the connection relationship. That is, there is a possibility that damage such as deformation or cracking due to stress occurs in the resin substrate at the contact portion with the rotating shaft. In this case, there is a concern that the durability and reliability of the rotation detector may be reduced.

  The present invention has been made in view of the above circumstances, and its object is to improve the reliability of the contact portion of the detection rotor with respect to the rotation shaft, and to improve the durability and reliability of the rotation detector. The present invention provides a detection rotor, a rotation detector, and a mounting structure thereof.

  In order to achieve the above object, the invention according to claim 1 is an attachment structure for a motor of a rotation detector having a detection stator and a detection rotor, and the motor includes a rotation shaft and a motor including the rotation shaft. Including a housing, a detection stator having a planar coil disposed on the surface and being fixed to the motor housing, a detection rotor having a flat resin substrate, and a planar coil disposed on the surface of the resin substrate. A metal member that is integrally provided at the center of the resin substrate and is annularly formed to fix the detection rotor to the rotation shaft, and a plurality of convex portions that project radially on the outer peripheral side of the metal member. The detection rotor is disposed on the rotation shaft so that the surface side faces the surface side of the detection stator, and the metal member is fixed to the rotation shaft by being press-fitted onto the outer periphery of the rotation shaft. You .

  According to the configuration of the above invention, the detection rotor is fixed to the rotation shaft by press-fitting the annular metal member integrally provided at the center of the resin substrate to the outer periphery of the rotation shaft. A strong bonding force can be obtained. In addition, due to the plurality of convex portions protruding radially on the outer peripheral side of the metal member, the bonding force in the circumferential direction between the metal member and the resin substrate is increased, and stress applied to the metal member is dispersed.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, each convex portion of the metal member is tapered so that both sides in the circumferential direction spread outward. Intended to be

  According to the configuration of the invention described above, in addition to the operation of the invention according to claim 1, the detection rotor has a tapered shape so that both sides of each convex portion of the metal member spread outward, so that the resin substrate by thermal expansion. Even if spreads outward in the radial direction, a gap is hardly generated between the resin substrate and the convex portion.

  In order to achieve the above object, according to a third aspect of the present invention, in the first or second aspect of the invention, a through hole penetrating in the axial direction is formed in each convex portion of the metal member. The purpose.

  According to the configuration of the invention, in addition to the operation of the invention according to claim 1 or 2, the detection rotor has a through hole formed in each convex portion of the metal member, so that the gap between the metal member and the resin substrate is formed. The thermal expansion difference is alleviated at the through hole portion.

  In order to achieve the above object, according to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the detection rotor has a resin substrate and a metal member having the same thickness. Projections having a thickness smaller than that of the resin substrate are formed on the outer periphery, and the projections are embedded in the resin substrate and engaged with each other.

  According to the configuration of the invention described above, in addition to the operation of the invention according to any one of claims 1 to 3, the detection rotor has the protrusions formed on the outer periphery of the metal member embedded in the resin substrate and engaged with each other. Therefore, when the resin substrate and the metal member having the same thickness are joined, the relative movement in the axial direction is restricted between the two.

  In order to achieve the above object, the invention according to claim 5 is a rotation detector comprising a detection stator and a detection rotor, wherein the detection stator has a planar coil disposed on a surface thereof and is fixed to the housing. And the detection rotor is integrally provided at the center of the resin substrate, the planar resin substrate disposed on the surface of the resin substrate, and the center of the resin substrate, to fix the detection rotor to the rotation shaft Including a metal member formed in an annular shape and a plurality of convex portions projecting radially on the outer peripheral side of the metal member, and the detection rotor has a surface side facing the surface side of the detection stator It is intended to be configured to be disposed on the rotating shaft and to be fixed to the rotating shaft by press-fitting a metal member on the outer periphery of the rotating shaft.

  According to the structure of the said invention, this detector is applicable to the attachment structure in any one of Claims 1 thru | or 4.

  In order to achieve the above object, an invention according to claim 6 is a detection rotor that constitutes a rotation detector together with a detection stator, and includes a flat resin substrate and a planar coil disposed on the surface of the resin substrate. A metal member that is integrally provided at the center of the resin substrate and is annularly formed to fix the detection rotor to the rotation shaft, and a plurality of convex portions that project radially on the outer peripheral side of the metal member. The resin substrate is arranged on the rotating shaft so as to face the detection stator, and the metal member is fixed to the rotating shaft by being press-fitted into the outer periphery of the rotating shaft.

  According to the configuration of the invention, the detection rotor can be applied to the rotation detector according to any one of claims 1 to 5.

  According to the first aspect of the present invention, the reliability of the contact portion of the detection rotor with respect to the rotating shaft can be improved, and the durability and reliability of the rotation detector can be improved.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to suppress circumferential displacement and backlash due to thermal expansion between the metal member and the resin substrate.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is possible to prevent cracking due to thermal expansion of the resin substrate.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, it is possible to prevent the resin substrate from coming off in the axial direction.

  According to the fifth aspect of the present invention, the reliability of the contact portion of the detection rotor with the rotation shaft can be improved, and the durability and reliability of the rotation detector can be improved.

  According to invention of Claim 6, it can utilize suitably for the rotation detector in any one of Claim 1 thru | or 5.

The front sectional view showing a rotation detector and a motor to which the rotation detector is attached according to the first embodiment. The perspective view which concerns on the same embodiment and shows the detection stator and detection rotor which comprise a rotation detector from diagonally upward. The perspective view which shows the detection stator and detection rotor which comprise a rotation detector according to the same embodiment seeing from diagonally downward. The bottom view which shows a detection rotor concerning the embodiment. The bottom view which shows the metal member which concerns on the embodiment and comprises a detection rotor. The bottom view which expands and shows the part of the chain line circle | round | yen of the metal member of FIG. 5 concerning the embodiment. The bottom view which expands and shows the part of the chain line circle of the detection rotor of FIG. 4 concerning the embodiment. FIG. 5 is an enlarged sectional view showing the detection rotor of FIG. 4 along the line AA according to the same embodiment; The top view which concerns on the embodiment and shows a detection stator. The bottom view which shows the detection stator according to the embodiment. The front sectional view showing a detection stator concerning the embodiment. The right view which concerns on the same embodiment and shows a detection stator. The bottom view which concerns on the same embodiment and shows a part of metal member. The bottom view which concerns on 2nd Embodiment and shows a part of metal member. The bottom view which concerns on another embodiment and shows a metal member. The bottom view which concerns on another embodiment and shows a metal member.

<First Embodiment>
Hereinafter, a detection rotor, a rotation detector, and a mounting structure thereof according to a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front sectional view showing a rotation detector 1 and a motor 2 to which the rotation detector 1 is attached in this embodiment (hereinafter, the direction of FIG. 1 is a front view for convenience). The motor 2 includes a motor housing 11 having a substantially disk-shaped appearance, a rotary shaft 14 included in the motor housing 11 and supported rotatably via bearings 12 and 13 at the inner center thereof, A motor rotor 15 fixed on the outer periphery of the rotary shaft 14 on the inner side, and a motor stator 16 fixed on the inner side of the motor housing 11 via a gap on the outer peripheral side of the motor rotor 15 are provided. The motor stator 16 is provided with a coil 17.

  In FIG. 1, a housing portion 11 a for housing the rotation detector 1 is integrally formed below the motor housing 11. The accommodating portion 11 a is configured by a substantially annular peripheral wall with the rotating shaft 14 and the bearing 13 as the center. A communication hole 11b communicating with the outside is formed in a part of the outer periphery of the housing portion 11a.

  As shown in FIG. 1, the rotating shaft 14 of the motor 2 has a substantially cylindrical shape, and includes a large diameter portion 14a, a medium diameter portion 14b, and a small diameter portion 14c. The large diameter portion 14a is supported by one bearing 12, and the motor rotor 15 is fixed to the outer periphery thereof. The small-diameter portion 14c is supported by the other bearing 13, and the tip end portion projects outside from a shaft hole 11c formed in the bottom wall of the accommodating portion 11a.

  As shown in FIG. 1, the rotation detector 1 includes a detection stator 6 and a detection rotor 7. The detection rotor 7 is fixed to the outer periphery of the medium diameter portion 14 b of the rotating shaft 14 inside the motor housing 11. That is, the detection rotor 7 is press-fitted and fixed to the middle diameter portion 14 b of the rotary shaft 14. The detection stator 6 is arranged inside the housing portion 11a of the motor housing 11 so as to face the detection rotor 7, and is fixed by a bolt 9 as a fixing member. A plurality of bolt holes 11d through which the bolts 9 are inserted are formed in the bottom wall of the accommodating portion 11a.

  FIG. 2 is a perspective view of the detection stator 6 and the detection rotor 7 constituting the rotation detector 1 of this embodiment when viewed obliquely from above. FIG. 3 is a perspective view of the detection stator 6 and the detection rotor 7 constituting the rotation detector 1 of this embodiment when viewed obliquely from below. FIG. 4 is a bottom view of the detection rotor 7 of this embodiment. In FIG. 5, the metal member 23 which comprises the detection rotor 7 of this embodiment is shown with a bottom view. As shown in FIGS. 2 to 4, the detection rotor 7 includes a resin substrate 21 having an annular flat plate shape, a planar coil 22 (see FIG. 3) disposed on a surface 21 a of the resin substrate 21, and a resin substrate 21. Of the metal member 23 formed in an annular shape to fix the detection rotor 7 to the outer periphery of the rotating shaft 14 and provided radially on the inner peripheral side of the metal member 23. One protrusion 23a.

  The resin substrate 21 is formed of PPS resin or the like. The metal member 23 is formed of SUS or the like. The planar coil 22 is formed on the resin substrate 21 by printing using an ink jet or the like, and an insulating layer is formed thereon.

  As shown in FIGS. 2 to 5, the metal member 23 is formed on the outer peripheral side corresponding to each of the plurality of (in this case, nine) protrusions 23 b and the protrusions 23 b in the axial direction. And a through-hole 23c penetrating through. These convex portions 23b are formed radially at equal angular intervals. The metal member 23 is insert-molded with respect to the resin substrate 21 at the outer peripheral portion including the convex portions 23b.

  FIG. 6 is an enlarged bottom view of the portion of the chain line circle S1 of the metal member 23 of FIG. As shown in FIG. 6, each convex part 23b of the metal member 23 has a tapered shape so that both sides 23ba in the circumferential direction spread outward by an angle θ1 (for example, “1 to 2 °”). FIG. 7 is an enlarged bottom view of the portion of the chain line circle S2 of the detection rotor 7 of FIG. As shown in FIG. 7, the through hole 23c is disposed in the middle of the base of the convex portion 23b and has a circular shape. The protrusion 23 a is formed integrally with the metal member 23.

  FIG. 8 shows the detection rotor 7 of FIG. 4 in an enlarged cross-sectional view along the line AA. As shown in FIGS. 4 and 8, in the detection rotor 7, the resin substrate 21 and the metal member 23 have the same thickness, and the outer periphery of the metal member 23, that is, a part of the plurality of convex portions 23b (in this case) A projection 23bb having a thickness smaller than the thickness of the resin substrate 21 is formed on the outer periphery of the (three). The protrusion 23bb is embedded in the resin substrate 21 so that the metal member 23 and the resin substrate 21 are engaged with each other.

  As shown in FIGS. 1 to 3, the detection rotor 7 is arranged so that the surface 21 a side of the resin substrate 21 faces the surface side of the detection stator 6, and on the outer periphery of the medium diameter portion 14 b of the rotating shaft 14. It is attached. Here, in the detection rotor 7, the inner periphery of the metal member 23 is press-fitted into the outer periphery of the medium diameter portion 14 b of the rotary shaft 14 and is fixed to the step portion 14 d. Further, the protrusion 23 a provided on the inner periphery of the metal member 23 engages with a groove (not shown) formed in the medium diameter portion 14 b, and the detection rotor 7 is positioned and prevented from rotating with respect to the rotating shaft 14. . In this way, the detection rotor 7 is fixed to the rotating shaft 14.

  FIG. 9 is a plan view showing the detection stator 6 of this embodiment. FIG. 10 is a bottom view of the detection stator 6 of this embodiment. FIG. 11 is a front sectional view of the detection stator 6 of this embodiment. FIG. 12 is a right side view of the detection stator 6 of this embodiment. As shown in FIGS. 1 to 3 and FIGS. 9 to 11, the detection stator 6 is formed in a substantially annular flat plate shape with resin, and a detection unit 31 in which a planar coil 32 is disposed on a surface 31 a, and the detection unit 31. A plurality of fixing projections 33 provided on the back surface of the detection portion 31, an outer peripheral rib 34 as an outer peripheral wall portion formed along the outer peripheral edge on the back surface side of the detection portion 31, and the back surface of the detection portion 31. An inner peripheral rib 35 as an inner peripheral wall portion formed along the inner peripheral edge of the through hole 31b on the side and extending in the axial direction, and one connector portion 36 facing the lateral direction (horizontal direction) from the detection portion 31 Prepare. The outer peripheral rib 34 and the plurality of fixing convex portions 33 are formed continuously and integrally. As shown in FIGS. 9 and 10, a plurality (four in this case) of convex portions 34 a are provided on the outer periphery of the outer peripheral rib 34 of the detection stator 6 so as to be in contact with the inner periphery of the accommodating portion 11 a. These convex portions 34a are arranged at equiangular intervals on the outer periphery of the outer peripheral rib 34, and extend along the axial direction thereof. As shown in FIG. 2, the planar coil 32 disposed on the surface 31 a of the detection unit 31 is formed by printing using an inkjet or the like, and an insulating layer is formed thereon.

  As shown in FIGS. 1 to 3 and FIGS. 9 to 11, each fixing convex portion 33 has a cylindrical shape, and in this embodiment, the back surface of the detection unit 31 is equiangularly spaced along the outer periphery thereof. Three are arranged. Each fixing projection 33 is provided with a metal bush 37 having a screw hole 37a as a fastening fitting. The metal bush 37 is insert-molded with respect to the fixing convex portion 33. The metal bush 37 is configured such that a bolt 9 is fastened to fix the detection stator 6 to the motor housing 11.

  As shown in FIGS. 1 to 3 and 9 to 11, a cavity 38 is formed in each fixing convex portion 33 at a position adjacent to the detection unit 31. Ribs 38a are formed in the cavities 38 to divide the cavities 38 into stripes.

  As shown in FIGS. 1 and 11, a plurality of metal terminals 39 are insert-molded in the connector portion 36. Each terminal 39 is bent at a right angle, and the first end 39 a is disposed in the connector portion 36, and the second end 39 b is disposed in the detection portion 31. A coil wire constituting the planar coil 32 is connected to each of the second end portions 39b arranged in the detection unit 31.

  Here, attachment of the detection stator 6 to the housing portion 11a of the motor housing 11 will be described. As shown in FIG. 1, the detection stator 6 is arranged so that the surface 31 a side of the detection portion 31 faces the surface 21 a side of the resin substrate 21 of the detection rotor 7. At this time, as shown in FIGS. 9 and 10, the outer periphery of the detection stator 6 is fitted inside the housing portion 11 a. In this state, each fixing convex portion 33 is disposed on the bottom wall of the accommodating portion 11a so as to be aligned with each bolt hole 11d. Then, the bolts 9 are inserted into the respective bolt holes 11d, and the bolts 9 are fastened to the metal bushes 37 from the outside of the motor housing 11 by the respective fixing convex portions 33, whereby the detection stator 6 is fixed to the housing portion 11a. . At this time, by appropriately adjusting the tightening degree of the three bolts 9, the parallelism of the surface 31 a of the detection unit 31 and the distance and position with the surface of the detection rotor 7 are adjusted.

  According to the rotation detector mounting structure in this embodiment described above, the detection rotor 7 is configured such that the annular metal member 23 integrally provided at the center of the resin substrate 21 is press-fitted into the outer periphery of the rotation shaft 14. Is fixed to the rotating shaft 14. Therefore, a strong coupling force is obtained between the detection rotor 7 and the rotating shaft 14. In addition, since the plurality of convex portions 23b projecting in the radial direction are provided on the outer peripheral side of the metal member 23, the convex portions 23b increase the coupling force in the circumferential direction between the metal member 23 and the resin substrate 21, and the metal member. The stress applied to 23 is dispersed. For this reason, the reliability of the contact part with respect to the rotating shaft 14 of the detection rotor 7 can be improved, and durability and reliability of the rotation detector 1 can be improved.

  In this embodiment, the detection rotor 7 has a taper shape so that both sides 23ba of the respective convex portions 23b of the metal member 23 spread outward. Therefore, even if the resin substrate 21 spreads radially outward due to thermal expansion, the detection rotor 7 It is difficult for a gap to be generated between the substrate 21 and each convex portion 23b. For this reason, the shift | offset | difference and rattling of the circumferential direction by the thermal expansion between the metal member 23 and the resin substrate 21 can be suppressed.

  In this embodiment, since the detection rotor 7 has a through hole 23c formed in each convex portion 23b of the metal member 23, a difference in thermal expansion between the metal member 23 and the resin substrate 21 is caused in the portion of the through hole 23c. Is alleviated. For this reason, the crack by the thermal expansion of the resin substrate 21 can be prevented.

  In this embodiment, in the detection rotor 7, the protrusions 23 bb provided on the convex portions 23 b of the metal member 23 are embedded in the resin substrate 21 and engaged with each other. Therefore, the relative movement in the axial direction is restricted between the two substrates 21 and 23 when the resin substrate 21 having the same thickness and the metal member 23 are joined. For this reason, the resin substrate 21 can be prevented from coming off in the axial direction.

  In this embodiment, since the metal member 23 is provided in the center of the detection rotor 7, the surroundings of the magnetic field can be improved at the metal member 23 portion. In addition, since a plurality of convex portions 23b are provided on the outer periphery of the metal member 23, for example, when the resin substrate 21 is molded, the number of gates in the mold is set to be the same as the number of the convex portions 23b, so that the resin flow Can be improved. Thereby, the flatness of the surface 21a of the resin substrate 21 can be ensured. Further, in this embodiment, a protrusion 23 a corresponding to the key groove is formed integrally with the metal member 23 on the inner periphery of the metal member 23. For this reason, compared with the case where a key is provided separately, the number of parts can be reduced.

  In addition, according to the rotation detector mounting structure in this embodiment, the detection stator 6 is provided with three fixing convex portions 33 on the back surface of the detecting portion 31, and the motor housing 11 is formed by these fixing convex portions 33. It is fixed to the accommodating portion 11a of the motor housing 11 by bolts 9 from the outside. Therefore, by adjusting the fixing degree of the bolt 9 with respect to each fixing convex portion 33 as appropriate, the parallelism of the surface 31a of the detection unit 31 and the distance and position with the surface side of the detection rotor 7 are adjusted. For this reason, it is possible to facilitate alignment and position adjustment of the detection stator 6 to ensure parallelism and an accurate distance with respect to the detection rotor 7, and to ensure the reliability as the detection stator 6. The detection accuracy as the detector 1 can be ensured.

  In this embodiment, the bolt 9 is not directly involved in the detection portion 31 of the detection stator 6 and the bolt 9 is fastened to each fixing convex portion 33, so that the surface 31a of the detection portion 31 is hardly distorted. Also in this sense, reliability as the detection stator 6 can be ensured, and detection accuracy as the rotation detector 1 can be ensured.

  In this embodiment, since the outer peripheral rib 34 is formed along the outer peripheral edge of the detection stator 6 on the back surface side of the detection unit 31, the detection unit 31 is reinforced. Moreover, since the inner peripheral rib 35 is formed along the inner peripheral edge on the back surface side of the detection unit 31, the detection unit 31 is reinforced. For this reason, it becomes difficult to produce distortion in the surface 31a of the detection part 31, the reliability as the detection stator 6 can be improved, and the detection accuracy as the rotation detector 1 can be improved.

  In this embodiment, since the outer peripheral rib 34 of the detection portion 31 and the plurality of fixing projections 33 are continuously formed integrally with the detection stator 6, the stress when the bolt 9 is associated with each fixing projection 33. However, the fixing protrusions 33 and the outer peripheral ribs 34 share the same. For this reason, the stress which affects the surface of the detection part 31 can be reduced, the reliability as the detection stator 6 can be further improved, and the detection accuracy as the rotation detector 1 can be further improved. .

  In this embodiment, since the cavity 38 is formed in each fixing projection 33 adjacent to the detection section 31 for the detection stator 6, expansion / contraction when the fixing projection 33 is resin-molded. Is absorbed by the cavity 38. For this reason, with respect to the detection stator 6, the influence of the expansion / contraction of each fixing convex portion 33 on the detection unit 31 can be reduced, and the flatness of the surface 31 a of the detection unit 31 can be ensured.

  In this embodiment, since the striped ribs 38 a are formed in the cavity 38, the coupling force between the fixing protrusions 33 and the detection unit 31 is secured at the cavity 38. For this reason, it is possible to ensure the integrity of each fixing convex portion 33 and the detection portion 31 for the detection stator 6.

  In this embodiment, since the metal bush 37 is provided on each fixing projection 33 for the detection stator 6, the coupling force between each fixing projection 33 and the bolt 9 is increased, and the metal bush 37 and the bolt 9 are connected to each other. Adjustment of the fixing force of the detection stator 6 is facilitated by the cooperation. For this reason, the detection stator 6 can be more reliably fixed to the motor housing 11, and the position adjustment work of the detection stator 6 can be facilitated.

  In this embodiment, since three detection convex portions 33 are provided on the detection unit 31 for the detection stator 6, it is difficult for torsional stress to be generated in the detection unit 31. For this reason, the flatness of the surface 31a of the detection part 31 is substantially securable. If the number of fixing projections 33 is two, it is difficult to adjust the parallelism of the detection unit 31, and if the number of fixing projections 33 is four or more, stress in the twisting direction is likely to occur in the detection unit. Become. For this reason, it can be said that the number of fixing convex portions 33 is three, even in consideration of workability.

  The detection stator 6 and the detection rotor 7 of this embodiment can be suitably applied to the rotation detector 1 in the above-described rotation detector mounting structure. Moreover, the rotation detector 1 of this embodiment can be suitably applied to the above-described rotation detector mounting structure.

Second Embodiment
Next, a second embodiment in which the detection rotor, the rotation detector, and the mounting structure thereof according to the present invention are embodied will be described in detail with reference to the drawings.

  In the following description, components equivalent to those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different points are mainly described.

  This embodiment differs from the first embodiment in the configuration of the detection rotor 7. FIG. 13 is a bottom view showing a part of the metal member 23 in the first embodiment. FIG. 14 is a bottom view showing a part of the metal member 23 in this embodiment. As shown in FIG. 14, in this embodiment, the inner diameter of the through hole 23c formed corresponding to each convex portion 23b of the metal member 23 is set to “1” with respect to the through hole 23c of the first embodiment shown in FIG. .5 times "is different. Therefore, in this embodiment, when the difference in thermal expansion between the metal member 23 and the resin substrate 21 is larger than that of the first embodiment, the portion of the through hole 23c is effectively relieved. For this reason, the crack by the thermal expansion of the resin substrate 21 can be prevented effectively.

  Other functions and effects in this embodiment are basically the same as those in the first embodiment.

  The present invention is not limited to the above-described embodiments, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention.

  For example, in each of the above embodiments, as shown in FIGS. 13 and 14, the through hole 23 c provided corresponding to each convex portion 23 b of the metal member 23 of the detection rotor 7 is formed in a circular shape, but this is not limitative. Is not to be done. FIGS. 15 and 16 show other examples of the metal member 23 by bottom views. That is, the through-hole 23c provided corresponding to each convex part 23b of the metal member 23 has a substantially trapezoidal shape as shown in FIG. 15, or a substantially square shape with a constriction as shown in FIG. Also good.

  Moreover, in the said embodiment, although the rotation detector 1 was arrange | positioned in the motor housing 11 of the motor 2, it is not limited to this, The rotation detector of this invention may be provided separately from a motor, Furthermore, You may use the rotation detector of this invention for rotation detection other than a motor.

  The present invention can be used for detecting rotation of a rotating shaft such as a motor.

DESCRIPTION OF SYMBOLS 1 Rotation detector 2 Motor 6 Detection stator 7 Detection rotor 11 Motor housing 14 Rotating shaft 21 Resin substrate 21a Surface 22 Planar coil 23 Metal member 23b Projection 23ba Side 23bb Projection 23c Through-hole 32 Planar coil

Claims (6)

An attachment structure for a motor of a rotation detector provided with a detection stator and a detection rotor,
The motor includes a rotating shaft and a motor housing containing the rotating shaft;
The detection stator has a planar coil disposed on a surface thereof and is fixed to the motor housing;
The detection rotor is integrally provided at the center of the resin substrate, a planar coil disposed on the surface of the resin substrate, and the center of the resin substrate, and is annular to fix the detection rotor to the rotating shaft. And a plurality of convex portions projecting radially on the outer peripheral side of the metal member, and the surface side of the detection rotor faces the surface side of the detection stator The rotation detector mounting structure, wherein the rotation detector is fixed to the rotating shaft by being press-fitted on the outer periphery of the rotating shaft.   The rotation detector mounting structure according to claim 1, wherein each convex portion of the metal member has a tapered shape so that both sides in the circumferential direction spread outward.   The rotation detector mounting structure according to claim 1, wherein a through-hole penetrating in the axial direction is formed in each convex portion of the metal member.   In the detection rotor, the resin substrate and the metal member have the same thickness, and a protrusion having a thickness smaller than the thickness of the resin substrate is formed on the outer periphery of the metal member, and the protrusion is embedded in the resin substrate. The rotation detector mounting structure according to claim 1, wherein the rotation detectors are engaged with each other. A rotation detector comprising a detection stator and a detection rotor,
The detection stator is configured such that a planar coil is disposed on a surface and is fixed to a housing;
The detection rotor is provided integrally with a flat resin substrate, a planar coil disposed on the surface of the resin substrate, and at the center of the resin substrate, and is annular to fix the detection rotor to a rotation shaft. And including a plurality of convex portions protruding radially on the outer peripheral side of the metal member, and the detection rotor is configured such that the surface side faces the surface side of the detection stator. The rotation detector is arranged on the rotating shaft, and is configured to be fixed to the rotating shaft by press-fitting the metal member on the outer periphery of the rotating shaft. A detection rotor constituting a rotation detector together with a detection stator,
A flat resin substrate;
A planar coil disposed on the surface of the resin substrate;
A metal member formed integrally in the center of the resin substrate and formed in an annular shape to fix the detection rotor to a rotation shaft;
A plurality of convex portions projecting radially on the outer peripheral side of the metal member, the resin substrate is disposed on the rotating shaft so as to face the detection stator, and the metal member is disposed on the outer periphery of the rotating shaft. A detection rotor configured to be fixed to the rotating shaft by being press-fitted.

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