JP5406862B2 - Detection stator, rotation detector and mounting structure thereof - Google Patents

Description

  The present invention relates to a detection stator, a rotation detector, and a mounting structure for the motor that are used for detecting rotation of a rotation shaft of a motor.

  Conventionally, as this type of technology, for example, a rotary transformer type resolver described in Patent Document 1 below is known. The resolver includes a fixed core, a rotating core facing the fixed core via a gap, a primary winding provided on the fixed core, and a secondary winding provided on the rotating core. A rotating transformer unit composed of the primary side winding and the secondary side winding, an excitation winding provided on the rotation side core, a detection winding provided on the fixed side core, and the excitation winding and detection A signal generation unit including windings. The resolver is fixed to the gap surface of the fixed core, and the fixed side sheet coil in which the primary winding of the rotary transformer unit and the detection winding of the signal generation unit are integrally formed, and the gap surface of the rotary side core And a rotating side sheet coil formed integrally by connecting a secondary winding of the rotating transformer unit and an exciting winding of the signal generating unit in series.

  Here, the fixed-side core is fixed to the inside of a bracket that rotatably supports the shaft, and the rotating-side core is fixed on the outer periphery of the shaft while facing the fixed-side core through a gap.

Japanese Patent Laid-Open No. 8-136211

  However, in the resolver described in Patent Document 1, the fixed side core is simply fixed inside the bracket, and the rotary side core is simply fixed on the outer periphery of the shaft. was difficult. For example, when the base material of the fixed side core or the base material of the rotation side core is made of resin or the like, if there is a deformation such as a slight warpage in the base material, the fixed side coil and the rotation side sheet coil are in parallel. Degrees and accurate distances cannot be obtained. In this case, it is necessary to align and adjust at least one of the fixed side core and the rotation side core, but Patent Document 1 did not disclose or suggest such alignment or position adjustment. In addition, if the positioning and position adjustment of the fixed core and the rotating core cannot be performed well, it affects the detection accuracy of the resolver, which may affect the productivity of the resolver.

  The present invention has been made in view of the above circumstances, and its purpose is to facilitate the alignment and position adjustment of the detection stator for ensuring the parallelism and the accurate distance to the detection rotor, and to provide a rotation detector. Is to provide a detection stator, 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 rotor is fixed to the rotating shaft inside the motor housing, a detection stator is formed in a plate shape with resin, and a planar coil is arranged on the surface, A plurality of fixing protrusions provided on the back surface of the detection unit, and a fixing member for fixing the detection stator to the motor housing. The detection stator has a surface side of the detection rotor on the surface side of the detection rotor. It is arranged on the inner side of the motor housing so as to be opposed to the motor housing, and is intended to be fixed to the motor housing by a fixing member from the outside of the motor housing at a plurality of fixing convex portions.

  According to the configuration of the above invention, the detection stator is provided with a plurality of fixing convex portions on the back surface of the detection portion, and is fixed to the motor housing by the fixing member from the outside of the motor housing at the fixing convex portions. By appropriately adjusting the fixing degree of the fixing member with respect to each fixing convex portion, the parallelism of the surface of the detection unit and the distance and position with the surface side of the detection rotor are adjusted. Further, since the fixing member is not directly involved in the detection unit, the surface of the detection unit is hardly distorted.

  In order to achieve the above object, the invention according to claim 2 is the invention according to claim 1, further comprising an outer peripheral wall portion formed along the outer peripheral edge on the back side of the detection portion and extending in the axial direction. The purpose is that.

  According to the configuration of the above invention, in addition to the operation of the invention according to claim 1, the outer peripheral wall portion is formed along the outer peripheral edge on the back surface side of the detection portion, so that the detection portion is reinforced.

In order to achieve the above object, the invention described in claim 3 is the invention described in claim 2,
The gist is that the outer peripheral wall portion and the plurality of fixing convex portions are integrally formed continuously.

  According to the configuration of the above invention, in addition to the operation of the invention according to claim 2, since the outer peripheral wall portion and the plurality of fixing convex portions are integrally formed continuously, a fixing member is provided on each fixing convex portion. The stress at the time of involvement is shared by each fixing convex part and the outer peripheral wall part.

  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, cavities are formed at positions adjacent to the detecting portions in the plurality of fixing convex portions. The purpose is to be.

  According to the configuration of the invention described above, in addition to the function of the invention according to any one of claims 1 to 3, since the plurality of fixing convex portions are formed with cavities at positions adjacent to the detecting portions, Expansion and contraction at the time of forming the projection for use are absorbed by the cavity.

  In order to achieve the above object, the invention described in claim 5 is characterized in that, in the invention described in claim 4, ribs are formed in the cavity to divide the cavity into stripes.

  According to the configuration of the above invention, in addition to the action of the invention according to claim 4, since the striped rib is formed in the cavity, the coupling force between each fixing convex part and the detection part is formed in the cavity part. Secured.

  In order to achieve the above object, the invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein a plurality of fixing projections are provided with fastening metal fittings. To do.

  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 5, since the fastening fitting is provided on each fixing projection, the coupling between each fixing projection and the fixing member The force is increased, and the fixing force can be easily adjusted by cooperation with the fixing member.

  In order to achieve the above object, the invention described in claim 7 is the invention described in any one of claims 1 to 6, wherein three fixing convex portions are provided.

  According to the configuration of the invention described above, in addition to the action of the invention according to any one of claims 1 to 6, since the three fixing convex portions are provided, it is difficult for torsional stress to occur in the detection portion.

  In order to achieve the above object, an invention according to claim 8 is a rotation detector including a detection stator and a detection rotor, and the detection rotor is fixed to the rotation shaft of the motor inside the motor housing. And the detection stator is formed in a plate shape with resin, and includes a detection portion in which a planar coil is disposed on the surface, and a plurality of fixing convex portions provided on the back surface of the detection portion. And a fixing member for fixing the detection stator to the motor housing. The detection stator is disposed inside the motor housing such that the surface side of the detection portion faces the surface side of the detection rotor, and a plurality of fixing protrusions are provided. It is intended that the portion is configured to be fixed to the motor housing by a fixing member from the outside of the motor housing.

  According to the configuration of the invention, the rotation detector can be applied to the mounting structure according to any one of claims 1 to 7.

  In order to achieve the above object, an invention according to claim 9 is a detection stator that constitutes a rotation detector together with a detection rotor, and is formed in a plate shape with a resin, and a planar coil is arranged on the surface. And a plurality of fixing projections provided on the back surface of the detection unit, the front surface side of the detection unit is arranged to face the detection rotor, and the plurality of fixing projections are fixed by a fixing member from the outside of the motor. It is intended to be configured to be fixed to a motor.

  According to the configuration of the invention, the detection stator can be applied to the rotation detector according to any one of claims 1 to 8.

  According to the first aspect of the present invention, it is possible to facilitate the alignment and position adjustment of the detection stator for ensuring the parallelism and the accurate distance to the detection rotor, and to ensure the detection accuracy of the rotation detector. be able to.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the surface of the detection portion is hardly distorted, and the reliability as the detection stator can be improved. The detection accuracy can be improved.

  According to the third aspect of the present invention, the stress that affects the surface of the detection unit can be reduced with respect to the effect of the second aspect of the invention, and the reliability as the detection stator is further improved. Therefore, the detection accuracy as a rotation detector can be further improved.

  According to the invention described in claim 4, in contrast to the effect of the invention described in any one of claims 1 to 3, the influence of the expansion / contraction of each fixing convex portion on the detection portion is reduced for the detection stator. And the flatness of the surface of the detection unit can be ensured.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, it is possible to secure the integrity of each fixing convex part and the detection part for the detection stator.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the detection stator can be more securely fixed to the motor housing, and the position of the detection stator Adjustment work can be facilitated.

  According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, it is possible to substantially ensure the flatness of the surface of the detection unit.

  According to the invention described in claim 8, it is possible to facilitate the alignment and position adjustment of the detection stator for ensuring the parallelism and the accurate distance to the detection rotor, and to ensure the detection accuracy of the rotation detector. be able to.

  According to the ninth aspect of the present invention, it can be suitably used for the rotation detector according to any one of the first to eighth aspects.

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 concern on the same embodiment and are related to the same embodiment, and comprises a rotation detector from diagonally downward. 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 fragmentary sectional view which expands and shows the state before the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The partial top view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state after the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary top view which expands and shows the state after the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The front sectional view which shows the attachment state with respect to the accommodating part of a detection stator according to the embodiment. The right view which concerns on the embodiment and shows the attachment state with respect to the accommodating part of a detection stator partially fractured | ruptured. The front sectional view which shows the attachment state with respect to the accommodating part of a detection stator concerning 2nd Embodiment. FIG. 10 is a front cross-sectional view illustrating a state in which the detection stator is attached to the housing portion according to the third embodiment. The front sectional view concerning the 4th embodiment and showing the attachment state to the storage part of a detection stator. FIG. 10 is a front cross-sectional view illustrating a state in which the detection stator is attached to the housing portion according to the fifth embodiment. The front sectional view showing the attachment state to the storage part of the detection stator according to the sixth embodiment. FIG. 10 is a front sectional view showing a state of attachment of a detection stator to a housing portion according to a seventh embodiment. FIG. 20 is a front sectional view showing an attachment state of the detection stator to the accommodating portion according to the eighth embodiment. The front sectional view concerning the 9th embodiment and showing the attachment state to the storage part of the detection stator. The front sectional view showing the attachment state to the storage part of the detection stator according to the tenth embodiment. The fragmentary sectional view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning 11th Embodiment. The partial top view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state after the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary top view which expands and shows the state after the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning 12th Embodiment. The partial top view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state after the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary top view which expands and shows the state after the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state before the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning 13th Embodiment. The partial top view which expands and shows the state before the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary sectional view which expands and shows the state after the connection of the 2nd end part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The fragmentary top view which expands and shows the state after the connection of the 2nd edge part of one terminal and the coil wire in the surface of a detection part concerning the embodiment. The bottom view which shows a detection stator concerning 14th 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 shows a detection stator concerning 15th 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 front sectional view which shows the attachment state with respect to the accommodating part of a detection stator according to the embodiment. The top view which concerns on 16th Embodiment and shows a detection stator. The bottom view which shows the detection stator according to the embodiment. The front view which concerns on the embodiment and shows a detection stator. The right view which concerns on the same embodiment and shows a detection stator. The front sectional view which shows the attachment state with respect to the accommodating part of a detection stator according to the embodiment. The front view which concerns on the same embodiment and decomposes | disassembles and shows a detection stator. The right side surface which concerns on the same embodiment and decomposes and shows a detection stator. The top view which concerns on 17th Embodiment and shows a detection stator. The bottom view which shows the detection stator according to the embodiment. The front view which concerns on the embodiment and shows a detection stator. The right view which concerns on the same embodiment and shows a detection stator. The front sectional view which shows the attachment state with respect to the accommodating part of a detection stator according to the embodiment. The front view which concerns on the same embodiment and decomposes | disassembles and shows a detection stator. The right side surface which concerns on the same embodiment and decomposes and shows a detection stator.

<First Embodiment>
Hereinafter, a detection stator, 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 into the middle diameter portion 14 b of the rotating shaft 14 and is fixed by the ring-shaped stopper 8. 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. As shown in FIGS. 2 and 3, 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. 1 is provided on the inner periphery of the metal member 23, and is provided on the inner periphery of the metal member 23. The metal member 23 has a substantially annular shape that contacts the rotation shaft 14 to fix the detection rotor 7 to the outer periphery of the rotation shaft 14. Two protrusions 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 and 3, the metal member 23 has a plurality of convex portions 23 b that protrude radially in the outer periphery thereof. 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.

  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, the detection rotor 7 is prevented from coming off by the ring-shaped stopper 8 in a state where the inner periphery of the metal member 23 is press-fitted into the outer periphery of the medium diameter portion 14b of the rotary shaft 14 and positioned at the stepped portion 14d. . 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. 4 is a plan view showing the detection stator 6 of this embodiment. FIG. 5 is a bottom view of the detection stator 6 of this embodiment. FIG. 6 is a front sectional view of the detection stator 6 of this embodiment. FIG. 7 is a right side view of the detection stator 6 of this embodiment. As shown in FIGS. 1 to 7, the detection stator 6 is formed in a substantially annular flat plate shape with a resin, and is provided on the back surface of the detection unit 31 and the detection unit 31 in which the planar coil 32 is disposed on the front surface 31 a. A plurality of fixing projections 33, an outer peripheral rib 34 as an outer peripheral wall formed on the back surface side of the detection unit 31 and extending in the axial direction, and a through hole on the back surface side of the detection unit 31 An inner peripheral rib 35 is formed as an inner peripheral wall portion that is formed along the inner peripheral edge and extends in the axial direction, and one connector portion 36 that faces the detection portion 31 in the lateral direction (horizontal direction). The outer peripheral rib 34 and the plurality of fixing convex portions 33 are formed continuously and integrally. As shown in FIGS. 4 and 5, a plurality (four in this case) of convex portions 34 a that are in contact with the inner periphery of the accommodating portion 11 a are provided on the outer periphery of the outer peripheral rib 34 of the detection stator 6. 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 7, each fixing convex portion 33 has a cylindrical shape, and in this embodiment, three are arranged at equiangular intervals along the outer periphery of the back surface of the detecting portion 31. 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 7, each fixing convex portion 33 is formed with a cavity 38 at a position adjacent to the detecting portion 31. Ribs 38a are formed in the cavities 38 to divide the cavities 38 into stripes.

  As shown in FIGS. 1 and 6, 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 32a constituting the planar coil 32 is connected to each second end 39b arranged in the detection unit 31.

  FIG. 8 is an enlarged partial cross-sectional view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 9 is an enlarged partial plan view showing a state before the connection between the second end 39 b of one terminal 39 and the coil wire 32 a on the surface 31 a of the detection unit 31. In this embodiment, a strip-shaped recess 31b is formed on the surface 31a of the detection unit 31 so as to expose a part of the second end 39b. The distal end portion of the coil wire 32a is disposed in a part of the concave portion 31b.

  From the above state, the second end 39b of each terminal 39 and the tip of the coil wire 32a are connected as follows. FIG. 10 is an enlarged partial sectional view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 11 is an enlarged partial plan view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. In this embodiment, the conductive paste 40 is used to connect the terminal 39 and the coil wire 32a. When the conductive paste 40 enters the recess 31b, the application range of the conductive paste 40 is stabilized by the anchor effect, and the connectivity between the conductive paste 40, the terminal 39, and the coil wire 32a can be improved. Moreover, the usage-amount of the electrically conductive paste 40 can be decreased.

  Here, attachment of the detection stator 6 to the housing portion 11a of the motor housing 11 will be described. FIG. 12 is a front sectional view showing an attachment state of the detection stator 6 of this embodiment with respect to the housing portion 11a. In FIG. 13, the attachment state with respect to the accommodating part 11a of the detection stator 6 of this embodiment is partly broken and is shown by a right side view.

  As shown in FIGS. 1, 12, and 13, the detection stator 6 is disposed such 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. 4 and 5, 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 6 are adjusted.

  According to the mounting structure of the rotation detector in this embodiment described above, 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 is formed by these fixing convex portions 33. 11 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 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 detection stator, a rotation detector, and a mounting structure thereof according to a second embodiment of the present invention 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 stator 6. In FIG. 14, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, in this embodiment, the metal bush 37 is assembled into the fixing convex portion 33 by being hot-pressed into the fixing convex portion 33. Therefore, the distance of the surface 31a of the detection unit 31 relative to the detection rotor 7 can be adjusted by adjusting the hot press-fitting height of the metal bush 37 with respect to the fixing convex portion 33.

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

<Third Embodiment>
Next, a detection stator, a rotation detector, and a mounting structure thereof according to a third embodiment of the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration of the detection stator 6. In FIG. 15, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, in this embodiment, when the detection portion 31 and the fixing convex portion 33 are resin-molded, a shim or the like is inserted into a hole for the metal bush 37 in the molding die to change the depth of the hole. The metal bush 37 is insert-molded with respect to the fixing convex portion 33. Thus, the distance with respect to the detection rotor 7 of the surface 31a of the detection part 31 can be adjusted by adjusting the assembly height of the metal bush 37 with respect to the fixing convex part 33.

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

<Fourth embodiment>
Next, a detection stator, a rotation detector, and a mounting structure thereof according to a fourth embodiment of the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration of the detection stator 6. In FIG. 16, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, in this embodiment, the shim 41 for dimension adjustment is interposed between the metal bush 37 and the bottom wall of the accommodating portion 11a, and the thickness of the shim 41 is changed. Thereby, the distance with respect to the detection rotor 7 of the surface 31a of the detection part 31 can be adjusted.

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

<Fifth Embodiment>
Next, a fifth embodiment in which the detection stator, 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.

  This embodiment differs from the above embodiments in the configuration of the detection stator 6. In FIG. 17, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, in this embodiment, a bolt 44 is insert-molded with respect to the fixing convex portion 33 instead of the metal bush 37 as a fastening fitting, and a nut 45 corresponding to the bolt 44 is used as a fixing member. A washer 46 is interposed between the portion 33 and the bottom wall of the accommodating portion 11. In this embodiment, the distance from the detection stator 6 to the detection rotor 7 can be adjusted by changing the thickness of the washer 46.

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

<Sixth Embodiment>
Next, a sixth embodiment in which the detection stator, 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.

  This embodiment differs from the first embodiment in the configuration of the detection stator 6. In FIG. 18, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, this embodiment is different from the first embodiment in that the spring 47 is interposed between the detection unit 31 and the bottom wall of the storage unit 11a. The spring 47 is disposed around the inner peripheral rib 35 of the detection unit 31. Accordingly, the elastic force of the spring 47 can prevent the detection stator 6 from rattling with respect to the accommodating portion 11a.

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

<Seventh embodiment>
Next, a seventh embodiment in which the detection stator, 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.

  This embodiment differs from the fifth embodiment in the configuration of the detection stator 6. In FIG. 19, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, this embodiment is different from the fifth embodiment in that the washer 46 in the fifth embodiment is changed to a spring washer 48. Therefore, the elastic force of the spring washer 48 can prevent the detection stator 6 from rattling with respect to the accommodating portion 11a.

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

<Eighth Embodiment>
Next, an eighth embodiment in which the detection stator, 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.

  This embodiment differs from the fourth embodiment in the configuration of the detection stator 6. In FIG. 20, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. In other words, this embodiment differs from the fourth embodiment in that the shim 41 in the fourth embodiment is changed to a spring washer 48. Therefore, the elastic force of the spring washer 48 can prevent the detection stator 6 from rattling with respect to the accommodating portion 11a.

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

<Ninth Embodiment>
Next, a ninth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration of the detection stator 6. In FIG. 21, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with front sectional drawing. That is, in this embodiment, a flanged bolt 49 is hot-pressed into the fixing convex portion 33 instead of the bolt 42 as a fastening fitting, and a nut 45 corresponding to the flanged bolt 49 is used as a fixing member. . In this embodiment, the distance from the detection stator 6 to the detection rotor 7 can be adjusted by adjusting the height of the heat press-fitting of the flanged bolt 49 to the fixing convex portion 33.

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

<Tenth Embodiment>
Next, a tenth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration of the detection stator 6. In FIG. 22, the attachment state with respect to the accommodating part 11a of the detection stator 6 in this embodiment is shown with a front sectional view. That is, in this embodiment, a flanged bolt 50 is insert-molded instead of the bolt 44 as a fastening fitting for the fixing convex portion 33, and a nut 45 corresponding to the flanged bolt 50 is used as a fixing member. . In this embodiment, the distance from the detection stator 6 to the detection rotor 7 can be adjusted by adjusting the insert height of the flanged bolt 50 with respect to the fixing convex portion 33.

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

<Eleventh embodiment>
Next, an eleventh embodiment in which the detection stator, 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.

  This embodiment differs from the first embodiment in the configuration related to the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 23 is an enlarged partial sectional view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 24 is an enlarged partial plan view showing a state before the connection between the second end 39 b of one terminal 39 and the coil wire 32 a on the surface 31 a of the detection unit 31. In this embodiment, a strip-shaped recess 31b is formed on the surface 31a of the detection unit 31 so as to expose a part of the second end 39b. Further, the front end surface 39ba of the second end portion 39b is bent so as to be flush with the surface 31a of the detection unit 31. And the front-end | tip part of the coil wire 32a is arrange | positioned in the vicinity of the front end surface 39ba.

  From the above state, the second end 39b of each terminal 39 and the tip of the coil wire 32a are connected as follows. FIG. 25 is an enlarged partial sectional view showing a state after the connection between the second end 39 b of one terminal 39 and the coil wire 32 a on the surface 31 a of the detection unit 31. FIG. 26 is an enlarged partial plan view showing a state after the connection between the second end 39 b of one terminal 39 and the coil wire 32 a on the surface 31 a of the detection unit 31. In this embodiment, the conductive paste 40 is used to connect the terminal 39 and the coil wire 32a. When the conductive paste 40 enters the recess 31b, the application range of the conductive paste 40 is stabilized by the anchor effect, and the connectivity between the conductive paste 40, the terminal 39, and the coil wire 32a can be improved. Moreover, since the front end surface 39ba of the second end portion 39b is bent flush with the surface 31a of the detection unit 31, the bonding property of the conductive paste 40 at that portion can be improved. Moreover, the usage-amount of the electrically conductive paste 40 can be decreased.

<Twelfth embodiment>
Next, a twelfth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration related to the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 27 is an enlarged partial sectional view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 28 is an enlarged bottom view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. In this embodiment, the concave portion 31b provided corresponding to the second end portion 39b of the terminal 39 is omitted, and a part of the second end portion 39b is flush with the surface 31a. Different from form.

  From the above state, the second end 39b of each terminal 39 and the tip of the coil wire 32a are connected as follows. FIG. 29 is an enlarged cross-sectional view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 30 is an enlarged bottom view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. In this embodiment, the conductive paste 40 is used for connection between the terminal 39 and the coil wire 32a. Unlike 1st Embodiment, since there is no recessed part 31b, the film thickness of the electrically conductive paste 40 becomes uniform on the surface 31a. For this reason, the stress at the time of thermal expansion can be reduced and the crack of the electrically conductive paste 40 can be prevented.

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

<13th Embodiment>
Next, a thirteenth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  This embodiment differs from the first embodiment in the configuration related to the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 31 is an enlarged partial sectional view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 32 is an enlarged bottom view showing a state before the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. This embodiment is different from the twelfth embodiment in that a projection 39bb is provided at a portion of the second end 39b that is flush with the surface 31a of the detection unit 31.

  From the above state, the second end 39b of each terminal 39 and the tip of the coil wire 32a are connected as follows. FIG. 33 is an enlarged cross-sectional view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. 34 is an enlarged bottom view showing a state after the connection between the second end 39b of one terminal 39 and the coil wire 32a on the surface 31a of the detection unit 31. FIG. In this embodiment, the conductive paste 40 is used for connection between the terminal 39 and the coil wire 32a. In this embodiment, unlike the first embodiment, since there is no recess 31b, the film thickness of the conductive paste 40 is uniform on the surface 31a. For this reason, the stress at the time of thermal expansion can be reduced and the crack of the electrically conductive paste 40 can be prevented. In addition, since the protrusion 39bb is provided at the second end 39b, the bonding property with the conductive paste 40 can be improved.

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

<Fourteenth embodiment>
Next, a fourteenth embodiment that embodies a detection stator, a rotation detector, and a mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  FIG. 35 is a bottom view of the detection stator 6 of this embodiment. FIG. 36 is a front sectional view showing the detection stator 6 of this embodiment. FIG. 37 is a right side view of the detection stator 6 of this embodiment. The detection stator 6 of this embodiment is different from that of the first embodiment in that the outer peripheral rib 34 and the inner peripheral rib 35 provided on the back side of the detection unit 31 are omitted. Therefore, in the detection stator 6 of this embodiment, the shape of the detection unit 31 can be simplified by the amount of the absence of the outer peripheral rib 34 and the inner peripheral rib 35.

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

<Fifteenth embodiment>
Next, a fifteenth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  FIG. 38 is a bottom view of the detection stator 6 of this embodiment. FIG. 39 is a front sectional view of the detection stator 6 of this embodiment. FIG. 40 is a right side view of the detection stator 6 of this embodiment. In FIG. 41, the attachment state with respect to the accommodating part 11a of the detection stator 6 of this embodiment is shown with a front sectional view. In the detection stator 6 of this embodiment, the metal bush 37 provided in each fixing convex portion 33 is omitted, and instead, a tapping screw 51 as a fixing member is inserted into the hole 33a formed in the fixing convex portion 33. On the other hand, the configuration differs from that of the first embodiment in that it is configured to be screwed directly through the spring washer 48. Therefore, in the detection stator 6 of this embodiment, the configuration of the detection stator 6 can be simplified and lightened in that the metal bush 37 as a fastening metal fitting can be omitted.

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

<Sixteenth Embodiment>
Next, a sixteenth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  FIG. 42 is a plan view showing the detection stator 61 of this embodiment. FIG. 43 is a bottom view of the detection stator 61 of this embodiment. FIG. 44 is a front view of the detection stator 61 of this embodiment. FIG. 45 is a right side view of the detection stator 61 of this embodiment. In FIG. 46, the attachment state with respect to the accommodating part 11a of the detection stator 61 of this embodiment is shown with a front sectional view. In this embodiment, the detection stator 61 has a two-body structure of a coil substrate 62 that integrally includes a planar coil (not shown) and a holder 63 that holds the coil substrate 62, and includes the coil substrate 62 and the holder 63. A metal bush 64 or a terminal 65 as a fastening metal is press-fitted or inserted between them, and the coil substrate 62 and the holder 63 are finally integrated by heat caulking and snap fit, and the configuration is different from the above embodiments. .

  FIG. 47 is an exploded front view of the detection stator 61 of this embodiment. FIG. 48 is an exploded right side view of the detection stator 61 of this embodiment. In order to manufacture the detection stator 61 of this embodiment, as shown in FIGS. 47 and 48, a coil substrate 62 including a planar coil and a holder 63 are respectively resin-molded in advance. Here, for the coil substrate 62, polyimide (PI) resin or the like can be used as a base material. The holder 63 can be made of a low cost material such as nylon.

  Then, after the terminal 65 and the terminal pin 66 are press-fitted or inserted between the coil substrate 62 and the holder 63, the coil substrate 62 and the holder 63 are integrated by heat caulking and snap fitting.

  Therefore, in this embodiment, since the coil substrate 62 constituting the detection stator 61 is separately resin-molded, it can be formed into a thin and uniform simple plate shape, and the flatness of the surface on which the planar coil is provided can be easily obtained. can do. Further, the coil substrate 62 and the holder 63 have different functions and can be designed separately, so that the degree of freedom in design increases. Further, when the coil substrate 62 is made of PI resin, it becomes the same kind of material as the PI ink which is an insulating material of the planar coil, so that the bonding force by firing with the planar coil is increased. As a result, the planar coil printing process can be reduced by one process.

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

<Seventeenth Embodiment>
Next, a seventeenth embodiment embodying the detection stator, the rotation detector, and the mounting structure thereof according to the present invention will be described in detail with reference to the drawings.

  FIG. 49 is a plan view showing the detection stator 61 of this embodiment. FIG. 50 is a bottom view of the detection stator 61 of this embodiment. FIG. 51 is a front view of the detection stator 61 of this embodiment. FIG. 52 is a right side view of the detection stator 61 of this embodiment. FIG. 53 is a front sectional view showing a state in which the detection stator 61 of this embodiment is attached to the housing portion 11a. In this embodiment, the detection stator 61 has a two-body structure of a coil substrate 62 that integrally includes a planar coil (not shown) and a holder 63 that holds the coil substrate 62, and includes the coil substrate 62 and the holder 63. In the middle, the metal bush 64 and the terminal 65 as the fastening metal are press-fitted or inserted, and the coil substrate 62 and the holder 63 are finally integrated by laser welding.

  FIG. 54 is an exploded front view of the detection stator 61 of this embodiment. FIG. 55 is an exploded right side view of the detection stator 61 of this embodiment. In order to manufacture the detection stator 61 of this embodiment, as shown in FIGS. 54 and 55, a coil substrate 62 including a planar coil and a holder 63 are respectively resin-molded in advance. Here, a PI resin or the like can be used for the coil substrate 62 as a base material. The holder 63 can be made of a low cost material such as nylon.

  Then, after the terminal 65 and the terminal pin 66 are press-fitted or inserted between the coil substrate 62 and the holder 63, the coil substrate 62 and the holder 63 are integrated by laser welding. In FIG. 49, a portion LA to be laser welded is indicated by a two-dot chain line.

  Therefore, in this embodiment, since the coil substrate 62 and the holder 63 are laser-welded, both 62 and 63 can be coupled in a comparatively short time. Other functions and effects in this embodiment are basically the same as those in the sixteenth 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 the above-described embodiment, the detection rotor 7 is fitted and fixed to the outer periphery of the rotary shaft 14, but the detection rotor may be attached to the tip of the rotary shaft.

  In each of the embodiments described above, the detection rotor having a coil formed on the surface is used. However, the configuration of the detection rotor is not limited to this, and for example, magnetic properties such as alternating arrangement of nonmagnetic regions and magnetic regions can be used. By using a detection rotor configured to vary periodically in the circumferential direction, a rotation detector of a type that uses a self-inductance change of a coil provided in the detection stator can be configured, or two coils can be provided in the detection stator. A rotation detector of the type using the mutual inductance change between the two coils can be configured (for example, described in Japanese Patent Application Nos. 2009-256560 and 2009-295819).

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

DESCRIPTION OF SYMBOLS 1 Rotation detector 2 Motor 6 Detection stator 7 Detection rotor 9 Bolt (fixing member)
DESCRIPTION OF SYMBOLS 11 Motor housing 11a Accommodating part 14 Rotating shaft 31 Detection part 31a Surface 32 Plane coil 33 Fixing convex part 33a Hole 34 Peripheral rib (outer peripheral wall part)
37 Metal bush (fastening bracket)
38 Cavity 38a Rib 42 Bolt (fastening fitting)
43 Double nut (fixing member)
44 bolts (fastening brackets)
45 Nut (fixing member)
49 Brim bolt (fastening bracket)
50 collared bolt (fastening bracket)
61 Detection stator 64 Metal bush (metal for fastening)

Claims (9)

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 rotor is fixed to the rotating shaft inside the motor housing;
The detection stator includes a detection portion that is formed in a plate shape with a resin and has a planar coil disposed on the surface thereof, and a plurality of fixing convex portions provided on the back surface of the detection portion;
A fixing member for fixing the detection stator to the motor housing, and the detection stator is disposed inside the motor housing such that a surface side of the detection unit faces a surface side of the detection rotor, A rotation detector mounting structure, wherein the fixing member is fixed to the motor housing by the fixing member from the outside of the motor housing by a plurality of fixing protrusions.   The rotation detector mounting structure according to claim 1, further comprising an outer peripheral wall portion formed along an outer peripheral edge on a back surface side of the detection portion and extending in an axial direction.   The rotation detector mounting structure according to claim 2, wherein the outer peripheral wall portion and the plurality of fixing convex portions are integrally formed continuously.   The rotation detector mounting structure according to any one of claims 1 to 3, wherein a cavity is formed at a position adjacent to the detection portion in the plurality of fixing convex portions.   The rotation detector mounting structure according to claim 4, wherein a rib that divides the cavity into stripes is formed in the cavity.   The rotation detector mounting structure according to any one of claims 1 to 5, wherein a fastening fitting is provided on the plurality of fixing protrusions.   The rotation detector mounting structure according to claim 1, wherein three fixing protrusions are provided. A rotation detector comprising a detection stator and a detection rotor,
The detection rotor is configured to be fixed to the rotating shaft of the motor inside the motor housing;
The detection stator includes a detection portion that is formed in a plate shape with a resin and has a planar coil disposed on the surface thereof, and a plurality of fixing convex portions provided on the back surface of the detection portion;
A fixing member for fixing the detection stator to the motor housing, and the detection stator is disposed inside the motor housing such that a surface side of the detection unit faces a surface side of the detection rotor, A rotation detector configured to be fixed to the motor housing by the fixing member from the outside of the motor housing by a plurality of fixing convex portions. A detection stator that constitutes a rotation detector together with a detection rotor,
A detection unit in which a planar coil is arranged on the surface, formed in a plate shape with resin;
A plurality of fixing projections provided on the back surface of the detection unit, and arranged so that the front side of the detection unit faces the detection rotor, and is fixed from the outside of the motor by the plurality of fixing projections. A detection stator configured to be fixed to the motor by a member.

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