Stator

Abstract

The utility model provides a stator. The stator is provided with a stator core, an insulator, a coil, a circuit substrate and a spacer. The stator core has an annular core back surrounding the central axis in the circumferential direction, and a plurality of teeth extending in the radial direction from the core back and disposed in the circumferential direction. The insulator covers at least a portion of the stator core. The coil is attached to the teeth via the insulator. The circuit board is provided with an electronic component, and is disposed on one axial side of the stator core. The spacer is disposed between the circuit board and the stator core in the axial direction. The circuit board is connected to the spacer. The stator core has a support portion that supports the spacer.

Description

Technical Field

[0001] The utility model relates to a stator. Background Art

[0002] In the brushless motor of Patent Document 1, a stator having a plurality of salient poles arranged radially is provided with a magnetic pole detection sensor for detecting the magnetic poles of a magnet provided on a rotor, and control of switching the energization of the coils of each salient pole is performed based on a detection signal from the magnetic pole detection sensor. The brushless motor of Patent Document 1 is provided with a sensor holder for holding the magnetic pole detection sensor in a state facing the magnet, and the sensor holder is provided with a fixing unit that can be attached to and detached from the stator.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2003-264971 Utility Model Content

[0006] Issues to be Solved by Utility Models

[0007] In addition to the slots for configuring the magnetic pole detection sensor, the stator of the brushless motor of Patent Document 1 is also provided with slots for positioning the sensor holder relative to the stator. In addition to the slots for configuring the sensor, the slots for positioning the sensor holder are provided at the front end of the core, so there are magnetic effects such as torque pulsation and torque reduction.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a stator which suppresses magnetic influence.

[0009] Solutions to Solve Problems

[0010] Solution 1 of the present utility model is a stator, characterized in that it has:

[0011] A stator core having an annular core back surrounding a central axis in a circumferential direction and a plurality of teeth extending radially from the core back and arranged in a circumferential direction;

[0012] an insulator covering at least a portion of the stator core;

[0013] a coil mounted on the teeth via the insulator;

[0014] a circuit board mounted with electronic components and arranged on one axial side of the stator core; and

[0015] a spacer disposed between the circuit substrate and the stator core in the axial direction,

[0016] The circuit substrate and the spacer are connected.

[0017] The stator core includes a support portion that supports the spacer.

[0018] Scheme 2 is a stator according to scheme 1, characterized in that:

[0019] The support portion has a core hole portion that recesses the stator core in the axial direction.

[0020] The spacer has a spacer protrusion protruding in the axial direction at a position facing the core hole portion.

[0021] The spacer protrusion is located inside the core hole.

[0022] An adhesive member is disposed between the core hole portion and the spacer protrusion portion.

[0023] Scheme 3 is a stator according to scheme 1, characterized in that:

[0024] The support portion has a core hole portion that recesses the stator core in the axial direction.

[0025] The spacer has a spacer recessed portion that is recessed in the axial direction at a position facing the core hole portion.

[0026] A connection member is disposed between the core hole portion and the spacer recessed portion.

[0027] Solution 4 provides a stator, characterized in that it has:

[0028] A stator core having an annular core back surrounding a central axis in a circumferential direction and a plurality of teeth extending radially from the core back and arranged in a circumferential direction;

[0029] an insulator covering at least a portion of the stator core;

[0030] a coil mounted on the teeth via the insulator;

[0031] a circuit board mounted with electronic components and arranged on one axial side of the stator core; and

[0032] a spacer disposed between the circuit substrate and the stator core in the axial direction,

[0033] The circuit substrate and the spacer are connected.

[0034] The insulator has a support portion that supports the spacer.

[0035] Scheme 5 is a stator according to scheme 4, characterized in that:

[0036] The insulator covers a portion of the plurality of teeth on a side of the spacer.

[0037] Scheme 6 is a stator according to scheme 5, characterized in that:

[0038] The support portion has an insulator hole portion that recesses the insulator in the axial direction.

[0039] The spacer has a spacer protrusion protruding in the axial direction at a position facing the insulator hole.

[0040] The spacer protrusion is located inside the insulator hole.

[0041] Scheme 7 is a stator according to scheme 5, characterized in that:

[0042] The support portion has an insulator protrusion that protrudes the insulator in the axial direction.

[0043] The spacer has a spacer hole portion recessed in the axial direction at a position facing the insulator protrusion portion.

[0044] The insulator protrusion is located inside the spacer hole.

[0045] Utility Model Effect

[0046] According to the exemplary present invention, the spacer in which the electronic components are arranged can be attached to the stator core while suppressing the magnetic influence. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 FIG. 1 is a diagram showing an outer appearance of a motor according to an exemplary first embodiment.

[0048] Figure 2 FIG. 1 is a diagram showing a cross section along the rotation axis of the motor according to the exemplary first embodiment.

[0049] Figure 3 1 is an exploded view showing the interior of the motor according to the exemplary first embodiment.

[0050] Figure 4 1 is an exploded view showing a stator according to the exemplary first embodiment.

[0051] Figure 5 It is magnified Figure 4 A partial picture of .

[0052] Figure 6 It is an exploded view showing a modified example of the stator of the exemplary first embodiment.

[0053] Figure 71 is an exploded view showing a stator according to an exemplary second embodiment.

[0054] Figure 8 It is an exploded view showing a modified example of the stator according to the exemplary second embodiment.

[0055] In the figure:

[0056] 1—motor, 1B—motor, 10—stator, 10A—stator, 10B—stator, 10C—stator, 13—stator holder, 30—shaft, 40—sensor unit, 40A—sensor unit, 40B—sensor unit, 41—sensor, 42—circuit board, 43—spacer, 43A—spacer, 121—stator core, 121a—core back, 121b—tooth, 122—insulator, 122B—insulator, 122C—insulator, 123—wire ring, 124a—iron core hole portion, 124b—iron core hole portion, 125a—insulator hole portion, 125b—insulator hole portion, 126a—insulator protrusion portion, 126b—insulator protrusion portion, 432—spacer protrusion portion, 432a—spacer protrusion portion, 432b—spacer protrusion portion, 433a—spacer recess portion, 433b—spacer recess portion, 434a—connecting component, 434b—connecting component, Z—axial direction, Z1—one side of the axial direction, Z2—the other side of the axial direction. DETAILED DESCRIPTION

[0057] [First embodiment]

[0058] Hereinafter, an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in the drawings, the same reference symbols are marked for the same or equivalent parts, and the description is not repeated. In this specification, for easy understanding, the direction substantially parallel to the rotating shaft of the motor is recorded as the axial direction Z, one side of the axial direction Z is recorded as the one axial side Z1, and the other side of the axial direction Z is recorded as the other axial side Z2. In addition, the radial direction centered on the axial direction Z is recorded as the radial direction R, and the circumferential direction centered on the axial direction Z is recorded as the circumferential direction C. However, the directions are defined only for the convenience of explanation, and the orientation of the cooling device of the present invention when in use is not limited, except for the case where the horizontal direction and the vertical direction need to be defined. In addition, in the present application, "orthogonal directions" also include substantially orthogonal directions.

[0059] Reference Figure 1 to Figure 3 , a motor 1 according to an exemplary first embodiment will be described. Figure 1 FIG. 1 is a diagram showing an appearance of a motor 1 according to an exemplary first embodiment. Figure 2 1 is a diagram showing a cross section along the rotation axis of the motor 1 according to the exemplary first embodiment. Figure 3 1 is an exploded view showing the interior of the motor 1 according to the exemplary first embodiment.

[0060] As an example, the motor 1 is used in the wheel of a four-wheeled vehicle or a two-wheeled vehicle. Typically, the motor 1 is used as an in-wheel motor mounted on the axle of the four-wheeled vehicle or the two-wheeled vehicle.

[0061] like Figure 1 As shown, the motor 1 has a shaft 30 as a rotating shaft, a stator 10, and a rotor 20. In the case of an in-wheel motor, the shaft 30 constitutes a vehicle axle. The stator 10 is cylindrical and fixed to the shaft 30. The rotor 20 rotates relative to the stator 10. Specifically, the rotor 20 rotates around the stator 10 with the shaft 30 as an axis.

[0062] [Rotor]

[0063] like Figure 2 and Figure 3 As shown, the rotor 20 has a yoke 21, a plurality of magnets 22, a rim 25, and a connecting portion 26. The rim 25 is an annular component surrounding the outer circumference of the stator 10. For example, a tire not shown is mounted on the rim 25. The yoke 21 is a cylindrical, that is, an annular, iron component arranged along the inner circumferential surface of the rim 25. The yoke 21 is connected to the rim 25 by welding. In addition, instead of welding, aluminum or resin materials may be used on the rim 25, and the yoke 21 may be covered and fixed by insert molding. On the inner circumferential surface of the yoke 21, a plurality of magnets 22 are arranged along the inner circumferential surface. Specifically, the plurality of magnets 22 are arranged on the inner circumferential surface of the yoke 21 in a manner that the N poles and the S poles are alternately arranged in the circumferential direction. The magnet 22 is composed of, for example, a rectangular permanent magnet. In the embodiment, a plurality of magnets are arranged in an array, but it is also possible to alternately arrange the N poles and the S poles by a circular annular magnet.

[0064] The connection part 26 rotatably connects the rim 25 to the shaft 30. Specifically, the connection part 26 has a cover 23 and a pair of bearings 24. The cover 23 covers the rim 25, the yoke 21, and both end surfaces in the axial direction of the stator 10. In the embodiment, the cover 23 is connected to the yoke 21 by a screw. However, the cover 23 may also be connected to the rim 25.

[0065] In the present embodiment, the cover 23 includes a first cover 23a and a second cover 23b. The first cover 23a covers the rim 25, the yoke 21, and one axial side Z1 of the stator 10. The second cover 23b covers the rim 25, the yoke 21, and the other axial side Z2 of the stator 10. The first cover 23a and the second cover 23b each include a cylindrical portion 23c. For example, a brake mechanism 27 is disposed on the second cover 23b. In the embodiment, the first cover 23a, the second cover 23b, and the rim 25 are different components, but either the first cover 23a or the second cover 23b may be formed of a single component with the rim 25.

[0066] The cylindrical portion 23 c surrounds the shaft 30 and extends in the axial direction Z. The cylindrical portion 23 c holds the bearing 24 inside. The bearing 24 rotatably supports the first cover 23 a or the second cover 23 b on the shaft 30 .

[0067] [stator]

[0068] Next, refer to Figure 3 to Figure 5 , a stator 10 according to an exemplary first embodiment will be described. Figure 4 1 is an exploded view showing the stator 10 according to the exemplary first embodiment. Figure 5 It is magnified Figure 4 For ease of understanding, Figure 4 and Figure 5 A part of the coil 123 of the stator 10 is omitted. Figure 5 from Figure 4 The insulator 122 is omitted.

[0069] like Figure 3 to Figure 5 As shown, the stator 10 includes a stator holder 13 , a stator core 121 , an insulator 122 , a coil 123 , and a sensor unit 40 .

[0070] The stator holder 13 is a disc-shaped pressed part, and has a through hole 13 a penetrating in the axial direction Z. For example, the shaft 30 is press-fitted into the through hole 13 a, and the shaft 30 and the stator holder 13 are fixed.

[0071] The stator core 121 is annular and fixed to the outer periphery of the stator holder 13. The stator core 121 is arranged inside the magnet 22 in the radial direction R with a gap therebetween. The center of the stator core 121 substantially coincides with the center axis of the shaft 30.

[0072] The stator core 121 is formed by stacking a plurality of core components in the axial direction Z. The core components are formed of, for example, magnetic steel plates. Figure 5 As shown, the stator core 121 has a core back 121 a and teeth 121 b .

[0073] The core back 121a and the teeth 121b are integrally formed. The core back 121a is formed in an annular shape surrounding the central axis of the shaft 30 in the circumferential direction C. The teeth 121b extend from the outer surface of the core back 121a in the radial direction R to the outer side in the radial direction R. The plurality of teeth 121b are arranged along the circumferential direction C at equal intervals.

[0074] The insulator 122 covers at least a portion of the stator core 121. The insulator 122 is an insulating member that electrically insulates the stator core 121 from the coil 123. For example, the insulator 122 is formed of an insulating resin. The insulator 122 is attached to each tooth 121b.

[0075] Specifically, the insulator 122 is disposed on both side ends of the core back 121a in the axial direction Z and on both side ends of each tooth 121b in the axial direction Z. In addition, the insulator 122 is also disposed on the surface of each tooth 121b along the circumferential direction C and the outer side surface of the core back 121a in the radial direction R. Both side surfaces in the axial direction Z and the outer side region in the radial direction R and the outer side surface in the radial direction R of each tooth 121b are exposed and not covered by the insulator 122.

[0076] The coil 123 is attached to the tooth 121b via the insulator 122. The coil 123 is formed by winding a conductive wire (not shown) around each tooth 121b via the insulator 122. In the circumferential direction C, a plurality of coils 123 are arranged.

[0077] When a driving current is applied to the coil 123 , magnetic flux is generated in the plurality of teeth 121 b , thereby generating torque in the circumferential direction C due to attraction and repulsion between the teeth 121 b and the magnet 22 . As a result, the rotor 20 rotates about the shaft 30 relative to the stator 10 .

[0078] [Sensor unit]

[0079] In the present embodiment, a sensor unit 40 is arranged on one axial side Z1 of a part of the teeth 121b among the plurality of teeth 121b. The sensor unit 40 includes a sensor 41, a circuit substrate 42, and a spacer 43. The sensor 41 is mounted on a mounting surface of the circuit substrate 42 facing the other axial side Z2, and detects the state of the rotor 20 or the state of the coil 123. Detecting the state of the rotor 20 may include, for example, detecting the rotational position of the rotor 20 in the circumferential direction C by a Hall sensor or an encoder, or detecting the rotational speed of the rotor 20. Detecting the state of the coil 123 may include, for example, detecting the temperature of the coil 123 by a thermistor. The sensor 41 is not limited to the above-mentioned sensors, and the state detected by the sensor is not limited to the above-mentioned state. In the present embodiment, the sensor 41 is an example of an electronic component.

[0080] The spacer 43 is connected to the mounting surface side of the circuit board 42. The spacer 43 is arranged between the circuit board 42 and the stator core 121 in the axial direction Z. That is, the circuit board 42 is arranged on one axial side Z1 of the stator core 121 via the spacer 43.

[0081] The spacer 43 has a base 431 and spacer protrusions 432a and 432b. The sensor 41 is in contact with the base 431 and is positioned. In the present embodiment, three sensors 41 are arranged along the circumferential direction C on the end surface of the other axial side Z2 of the base 431. Each sensor 41 is arranged in the gap between the teeth 121b adjacent to each other in the circumferential direction C. For example, when the sensor 41 detects the rotational position of the rotor 20 in the circumferential direction C, the detection signal of each sensor 41 is sent to the control circuit of the motor 1 not shown in the figure to control the state of the coil 123 corresponding to the U phase, the V phase and the W phase respectively.

[0082] [Sensor unit installation 1]

[0083] The spacer protrusions 432a and 432b are substantially cylindrical protrusions protruding from the end surface on the other axial side Z2 of the base 431. In the present embodiment, two spacer protrusions 432a and 432b are provided on the base 431, but the spacer protrusions 432 provided on the base 431 are not limited to two. In addition, the shapes of the spacer protrusions 432a and 432b are not limited to substantially cylindrical.

[0084] On the other hand, in the stator core 121, a portion of the teeth 121b has core holes 124a and 124b that are recessed toward the other axial side Z2 in the exposed area not covered by the insulator 122. The core hole 124a and the spacer protrusion 432a are opposite to each other. The core hole 124b and the spacer protrusion 432b are opposite to each other. The spacer protrusion 432a is inserted into the core hole 124a. The spacer protrusion 432b is inserted into the core hole 124b. In other words, the spacer protrusion 432a is arranged at a position opposite to the core hole 124a and is located on the inner side of the core hole 124a. The spacer protrusion 432b is arranged at a position opposite to the core hole 124b and is located on the inner side of the core hole 124b. The core holes 124a, 124b and the spacer protrusions 432a, 432b may be inserted with a slight gap provided therebetween, or may be fixed by light press-fitting.

[0085] Specifically, a notch portion 121c and core holes 124a, 124b are formed in a portion of the tooth 121b. The notch portion 121c is formed in a recessed manner on the end surface in the circumferential direction C at the end portion of one axial side Z1 of the tooth 121b. The core holes 124a, 124b are longitudinal holes extending in the axial direction Z and having shapes corresponding to the spacer protrusions 432a, 432b, respectively. For example, when the spacer protrusions 432a, 432b are approximately cylindrical, the core holes 124a, 124b are cylindrical holes. In addition, as long as the spacer protrusions 432a, 432b can be inserted into the core holes 124a, 124b, the shapes of the spacer protrusions 432a, 432b and the shapes of the core holes 124a, 124b may be different shapes. The depth of the core holes 124a and 124b in the axial direction Z is shorter than the axial height of the tooth 121b. However, the core holes 124a and 124b may penetrate the tooth 121b in the axial direction.

[0086] When the spacer protrusions 432a, 432b are inserted into the core holes 124a, 124b, at least a portion of the sensor 41 is arranged inside the notch 121c. In the present embodiment, the notch 121c is arranged on three teeth 121b arranged along the circumferential direction C. By providing the notch 121c, the end of the sensor 41 on the other axial side Z2 can be arranged closer to the other axial side Z2 than the end of the tooth 121b on one axial side Z1. Thus, each sensor 41 can be arranged opposite to the magnet 22 in the radial direction, and the magnetic flux of the magnet 22 can be detected with high precision. In addition, the stator 10 including the sensor unit 40 can be miniaturized in the axial direction Z.

[0087] In this way, the spacer 43 is supported by the core holes 124a and 124b. The core holes 124a and 124b are examples of supporting parts. Therefore, in addition to the notch 121c for arranging each sensor 41, there is no need to provide a notch for fixing the spacer 43 at the radially outer end of the tooth 121b. Therefore, it is possible to provide a motor 1 that suppresses magnetic influences such as torque pulsation and torque reduction.

[0088] In addition, curable resin, adhesive, double-sided tape, or paste may be disposed between the spacer protrusion 432a and the core hole 124a, and between the spacer protrusion 432b and the core hole 124b. Curable resin, adhesive, double-sided tape, or paste is an example of an adhesive component. By filling the gap between the spacer protrusion 432a and the core hole 124a, and between the spacer protrusion 432b and the core hole 124b with an adhesive component, the sensor unit 40 can be easily and more firmly mounted on the stator 10.

[0089] In addition, in this embodiment, a protrusion such as a claw protruding in a direction intersecting the axial direction Z can also be provided at the front end of the other axial side Z2 of the spacer protrusion 432a, 432b to form a snap fit between the spacer protrusion 432a, 432b and the core hole portions 124a, 124b.

[0090] [Sensor unit installation 2]

[0091] Next, refer to Figure 6 Modifications of the stator 10 according to the exemplary first embodiment will be described. Figure 6 It is an exploded view showing a modified example of the stator 10 according to the exemplary first embodiment. Figure 6 The periphery of the sensor unit 40 in the modified example of the stator 10 is shown in an enlarged manner. Figure 6 In the figure, it is shown Figure 4 and Figure 5 A portion of the coil 123 and the insulator 122 are omitted.

[0092] and Figure 4 and Figure 5 Compared with the stator 10 shown, Figure 6 The stator 10A shown is identical to the stator 10 except that it has a sensor unit 40A instead of the sensor unit 40 .

[0093] Compared with the sensor unit 40, the sensor unit 40A has a spacer 43A instead of the spacer 43. The spacer 43A has a base 431A having spacer recesses 433a and 433b. The base 431A is the same as the base 431 except that it has spacer recesses 433a and 433b instead of the spacer protrusions 432a and 432b.

[0094] The spacer recesses 433a and 433b are recessed from the end surface of the other axial side Z2 of the base 431A to the one axial side Z1. In other words, the spacer recesses 433a and 433b are longitudinal holes extending from the end surface of the other axial side Z2 of the base 431A to the one axial side Z1. The spacer recesses 433a and 433b are respectively arranged at positions opposite to the core hole portions 124a and 124b. The spacer recess 433a and the core hole portion 124a are connected to each other via a rod-shaped connecting member 434a. The spacer recess 433b and the core hole portion 124b are connected to each other via a rod-shaped connecting member 434b. In other words, the connecting member 434a is arranged between the spacer recess 433a and the core hole portion 124a. The connecting member 434b is arranged between the spacer recess 433b and the core hole portion 124b. The connection members 434 a and 434 b are attachable to and detachable from the spacer 43A and the stator core 121 .

[0095] Specifically, the end of the connecting member 434a on one axial side Z1 is located inside the spacer recess 433a. The end of the connecting member 434a on the other axial side Z2 is located inside the core hole portion 124a. The end of the connecting member 434b on one axial side Z1 is located inside the spacer recess 433b. The end of the connecting member 434b on the other axial side Z2 is located inside the core hole portion 124b. In addition, for example, the shapes of the end of the connecting member 434a on one axial side Z1 and the end of the connecting member 434b on one axial side Z1 are the same as the shapes of the core hole portion 124a and the shapes of the core hole portion 124b, respectively.

[0096] In this way, since the sensor unit 40 is fixed to the stator core 121 by the connecting members 434a and 434b that are detachable from the spacer 43A and the stator core 121, only the connecting members 434a and 434b can be replaced, and the maintainability of the stator 10 is improved.

[0097] The material of the connecting member 434a is not particularly limited. In addition, the connecting members 434a and 434b may also form a snap fit between the spacer recesses 433a and 433b and the core hole portions 124a and 124b, similarly to the spacer protrusions 432a and 432b. In addition, an adhesive member may be disposed between the connecting member 434a and the core hole portion 124a and the spacer recess 433a, and between the connecting member 434b and the core hole portion 124b and the spacer recess 433b.

[0098] [Second embodiment]

[0099] Next, a motor according to an exemplary second embodiment is described. The second embodiment differs from the first embodiment in the shape of the insulator and the method of mounting the sensor unit. Hereinafter, the second embodiment will be described for matters different from the first embodiment, and the description of matters overlapping with the first embodiment will be omitted.

[0100] Reference Figure 7 , a stator 10B according to an exemplary second embodiment will be described. Figure 7 1 is an exploded view showing a stator 10B according to an exemplary second embodiment. Figure 7 The periphery of the sensor unit 40B in the stator 10B is shown in an enlarged manner.

[0101] Compared with the motor 1 of the first embodiment, the motor 1B of the second embodiment is the same as the motor 1 of the first embodiment except that the motor 1B has a stator 10B instead of the stator 10 .

[0102] like Figure 7As shown, the stator 10B includes the stator holder 13 of the motor 1 , the stator core 121 , the coil 123 , and the sensor unit 40 . In addition, the stator 10B includes an insulator 122B instead of the insulator 122 of the motor 1 .

[0103] and Figure 4 or Figure 6 Compared with the insulator 122 of the motor 1 shown in the figure, the insulator 122B covers the entire axial side Z1 of a portion of the tooth 121b. The insulator 122B covering the entire axial side Z1 of the tooth 121b is provided with insulator holes 125a and 125b recessed from the surface of the axial side Z1 toward the axial side Z2.

[0104] The insulator hole portion 125a and the spacer protrusion 432a are opposite to each other. The insulator hole portion 125b and the spacer protrusion 432b are opposite to each other. The spacer protrusion 432a is inserted into the insulator hole portion 125a. The spacer protrusion 432b is inserted into the insulator hole portion 125b. In other words, the spacer protrusion 432a is arranged at a position opposite to the insulator hole portion 125a and is located on the inner side of the insulator hole portion 125a. The spacer protrusion 432b is arranged at a position opposite to the insulator hole portion 125b and is located on the inner side of the insulator hole portion 125b. The insulator holes 125a and 125b are longitudinal holes extending along the axial direction Z and have shapes corresponding to the spacer protrusions 432a and 432b, respectively. For example, when the spacer protrusions 432a and 432b are substantially cylindrical, the insulator holes 125a and 125b are cylindrical holes. In addition, as long as the spacer protrusions 432a and 432b can be inserted into the insulator holes 125a and 125b, the shapes of the spacer protrusions 432a and 432b and the shapes of the insulator holes 125a and 125b may be different shapes.

[0105] In this way, the spacer 43 is supported by the insulator holes 125a and 125b. The insulator holes 125a and 125b are examples of the support portion. By processing the resin insulator 122B to provide a support portion for supporting the sensor unit 40 including the spacer 43, the support portion can be easily formed compared to the case of processing a metal stator core. In particular, the hole processing of the resin insulator 122B is easier than the hole processing of the metal stator core.

[0106] Furthermore, since the insulator 122B covers the entire one axial side Z1 of the partial tooth 121 b , a support portion for supporting the sensor unit 40 can be provided without processing the metal stator core, thereby reducing magnetic influence on the stator and the motor.

[0107] Next, refer to Figure 8, a modification example of the stator 10B according to the exemplary second embodiment will be described. Figure 8 It is an exploded view showing a modified example of the stator 10B according to the exemplary second embodiment.

[0108] and Figure 7 Compared with the stator 10B shown, Figure 8 The stator 10C shown is the same as the stator 10B except that it has a sensor unit 40A of the first embodiment instead of the sensor unit 40 and an insulator 122C instead of the insulator 122B.

[0109] The insulator 122C is different from the insulator 122B in that insulator protrusions 126 a and 126 b are provided at the positions of the insulator holes 125 a and 125 b .

[0110] In the stator 10C, the insulator protrusion 126a and the spacer recess 433a in the sensor unit 40A are opposed to each other. The insulator protrusion 126b and the spacer recess 433b in the sensor unit 40A are opposed to each other. The insulator protrusion 126a is inserted into the spacer recess 433a. The insulator protrusion 126b is inserted into the spacer recess 433b. In other words, the insulator protrusion 126a is arranged at a position opposite to the spacer recess 433a and is located inside the spacer recess 433a. The insulator protrusion 126b is arranged at a position opposite to the spacer recess 433b and is located inside the spacer recess 433b.

[0111] By providing the protrusions on the insulator 122C and the recesses on the spacer 43 , the thickness of the insulator 122C in the axial direction Z other than the protrusions can be reduced, and the stator 10C including the sensor unit 40A can be miniaturized in the axial direction Z.

[0112] The embodiments of the present invention are described above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and can be implemented in various ways without departing from the scope of the present invention. In addition, the multiple components disclosed in the above embodiments can be appropriately changed. For example, a certain component of all the components shown in a certain embodiment can be added to the components of other embodiments, or several components of all the components shown in a certain embodiment can be deleted from the embodiment.

[0113] In addition, in order to make the utility model easy to understand, the drawings are schematically shown with each component as the main body, and for the convenience of drawing production, the thickness, length, number, spacing, etc. of each component shown in the drawings are sometimes different from the actual ones. In addition, the structure of each component shown in the above embodiment is an example, and there is no special limitation. Of course, various changes can be made within the scope that does not substantially deviate from the effect of the utility model.

[0114] Availability in production

[0115] The utility model can be used in the field of stators.

Claims

1. A stator, characterized in that: have: A stator core having an annular core back surrounding a central axis in a circumferential direction and a plurality of teeth extending radially from the core back and arranged in a circumferential direction; an insulator covering at least a portion of the stator core; a coil mounted on the teeth via the insulator; a circuit board mounted with electronic components and arranged on one axial side of the stator core; and a spacer disposed between the circuit substrate and the stator core in the axial direction, The circuit substrate and the spacer are connected. The stator core includes a support portion that supports the spacer.

2. The stator according to claim 1, characterized in that: The support portion has a core hole portion that recesses the stator core in the axial direction. The spacer has a spacer protrusion protruding in the axial direction at a position facing the core hole portion. The spacer protrusion is located inside the core hole. An adhesive member is disposed between the core hole portion and the spacer protrusion portion.

3. The stator according to claim 1, characterized in that: The support portion has a core hole portion that recesses the stator core in the axial direction. The spacer has a spacer recessed portion that is recessed in the axial direction at a position facing the core hole portion. A connection member is disposed between the core hole portion and the spacer recessed portion.

4. A stator, characterized in that: have: A stator core having an annular core back surrounding a central axis in a circumferential direction and a plurality of teeth extending radially from the core back and arranged in a circumferential direction; an insulator covering at least a portion of the stator core; a coil mounted on the teeth via the insulator; a circuit board mounted with electronic components and arranged on one axial side of the stator core; and a spacer disposed between the circuit substrate and the stator core in the axial direction, The circuit substrate and the spacer are connected. The insulator has a support portion that supports the spacer.

5. The stator according to claim 4, characterized in that: The insulator covers a portion of the plurality of teeth on a side of the spacer.

6. The stator according to claim 5, characterized in that: The support portion has an insulator hole portion that recesses the insulator in the axial direction. The spacer has a spacer protrusion protruding in the axial direction at a position facing the insulator hole. The spacer protrusion is located inside the insulator hole.

7. The stator according to claim 5, characterized in that: The support portion has an insulator protrusion that protrudes the insulator in the axial direction. The spacer has a spacer hole portion recessed in the axial direction at a position facing the insulator protrusion portion. The insulator protrusion is located inside the spacer hole.

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