JP2020054198A - Motor device - Google Patents

Abstract

To improve an encapsulation performance of chips produced by press fitting a stator to a cylindrical member.SOLUTION: A motor device comprises a cylindrical member, and a stator including a stator core having an inner hole, an insulation member attached to the stator core, and a coil consisting of a conductor wound around the stator core via the insulation member. The stator core is attached to the cylindrical member, so that an inner peripheral surface of the stator core comes into contact with an outer peripheral surface of the cylindrical member. The stator core is a laminate obtained by laminating multiple steel sheets having inner hole in the axial direction, and a notch is formed at the same position in a circumference of the inner hole, in some steel sheets on a first side, i.e., one end side of the stator core in the axial direction, out of the multiple steel sheets.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a motor device.

  2. Description of the Related Art Conventionally, in a motor device including a stator having a stator core and a coil formed of a conductor wound around the stator core via an insulating member, it is known to press-fit the stator core into a cylindrical member. For example, in a motor device described in Patent Document 1, it is described that a stator is press-fitted into a bearing holder by inserting the stator into a stator press-fitting portion of a bearing holder as a cylindrical member.

JP 2013-252054 A

  By the way, when the stator is press-fitted into the cylindrical member, the inner peripheral surface of the stator and the outer peripheral surface of the cylindrical member may be strongly rubbed with each other to generate chips (cutting chips). Therefore, it is necessary to prevent the chips generated at the time of press-fitting from affecting the reliability of the motor device.

  Accordingly, an object of the present invention is to improve the sealing performance of chips generated by press-fitting a stator into a cylindrical member.

  An exemplary first invention of the present application is a coil comprising a cylindrical member, a stator core having an inner hole, an insulating member attached to the stator core, and a conductor wound around the stator core via the insulating member. Wherein the stator core is attached to the cylindrical member so that the inner peripheral surface of the stator core is in contact with the outer peripheral surface of the cylindrical member, and the stator core has a plurality of inner holes. A laminated body in which a plurality of steel plates are stacked in the axial direction, and among the plurality of steel plates, a part of the steel plate on a first side that is one end side in the axial direction of the stator core has a notch in a peripheral edge of an inner hole. It is a motor device formed in the same position.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing performance of the chip generated by press-fitting a stator into a cylindrical member can be improved.

It is a perspective view from one side of the motor device of an embodiment. It is a perspective view from the other side of the motor device of an embodiment. It is a sectional view of the motor device of an embodiment. It is an exploded perspective view about the main parts of the motor device of an embodiment. FIG. 3 is an exploded perspective view of the motor device according to the embodiment, excluding coils of a stator. It is a top view of the steel plate which comprises the stator core of the motor device of embodiment. FIG. 4 is an enlarged front view of one insulator included in the stator. It is an enlarged front view of the other insulator included in the stator. It is an enlarged front view of the stator of the motor device of an embodiment. FIG. 4 is a diagram illustrating a structure in an assembled state after a stator is press-fitted into a sleeve when the motor device according to the embodiment is assembled, as viewed from the circuit board side in the axial direction. It is an expanded sectional view of the structure of the assembly state of FIG. It is sectional drawing of a stator and a sleeve after a stator is press-fitted in a sleeve. It is a horizontal sectional view of the vehicle headlight to which the motor device of an embodiment is applied.

  Hereinafter, embodiments of the motor device of the present invention will be described.

(1) Schematic Configuration of Motor Device 1 of Embodiment Hereinafter, a schematic configuration of the motor device 1 of the embodiment will be described with reference to FIGS.
FIG. 1 is a perspective view from one side of a motor device 1 of the embodiment. FIG. 2 is a perspective view from the other side of the motor device 1 of the embodiment. FIG. 3 is a cross-sectional view of the motor device 1 according to the embodiment. FIG. 4 is an exploded perspective view of main components of the motor device 1 according to the embodiment.
In the following description, “axial direction” means the axial direction of the sleeve 9 of the motor device 1. The axial direction is equal to the rotation axis of the shaft 5, which is the rotation axis of the motor (the axis CTR in FIG. 3).

  As shown in FIGS. 1 to 3, an exemplary motor device 1 of the present embodiment includes a circuit board 3, a yoke 4, a shaft 5, a rotating body 6, a cover 2 that covers the rotating body 6, and a stator 8. And a device for rotating the rotating body 6 by a DC brushless motor.

  The cover 2 is made of, for example, resin and has a bottomed rectangular parallelepiped shape. As shown in FIG. 4, a sleeve 9 (an example of a cylindrical member) is attached to the cover 2. The sleeve 9 is made of metal such as iron or aluminum, for example, and is disposed in a hole provided at the center of the circular bottom of the cover 2. The cover 2 and the sleeve 9 are integrated by insert molding.

The circuit board 3 is electrically connected to the coil (winding) 83 of the stator 8 via conductive pins 84 (an example of a conductive member; see FIGS. 3 and 4), and a control circuit (not shown) is mounted. . The circuit board 3 supplies a current to the coil 83.
As shown in FIG. 4, the circuit board 3 includes a first surface 3a which is a surface on the yoke 4 side, and a second surface 3b which is a surface on the back side of the first surface 3a and a surface on the cover 2 side. Have. The first surface 3a is a main mounting surface on which main circuit components are mounted.
An inner hole 3h is formed near the center of the circuit board 3, and the inner hole 3h is pressed into the outer peripheral surface of the sleeve 9, whereby the circuit board 3 and the sleeve 9 are connected.
The circuit board 3 has two through holes 32. As shown in FIGS. 2 and 3, the screw 22 is fastened to the cover 2 through the through hole 32, and regulates the circumferential displacement of the circuit board 3 with respect to the cover 2. The cover 2 is arranged to face the second surface 3b of the circuit board 3 opposite to the first surface 3a, and is configured to cover the second surface 3b of the circuit board 3.

  As shown in FIG. 4, the cover 2 has two openings 24, and the circuit board 3 has two through holes. As will be described later, in the motor device 1 of the present embodiment, the other end of the conductive pin 84 having one end fixed to the coil 83 of the stator 8 passes through the through hole 34 of the circuit board 3, and the second surface 3 b ( (Surface on the cover 2 side). The opening 24 of the cover 2 is provided to efficiently perform the work of soldering the conductive pins 84.

As shown in FIG. 3, the shaft 5 extends in the axial direction of the motor device 1. One end of the shaft 5 is fixed to the support portion 41. The support portion 41 is made of, for example, metal, and the yoke 4 and the support portion 41 are joined by caulking the support portion 41. The support portion 41 is pressed against the inner surface (leftward in FIG. 3) of the yoke 4 in the axial direction of FIG. 3 by the urging force of the coil spring 53 provided between the support portion 41 and the bearing 52.
One end of the shaft 5 is pressed into the support portion 41, and the other end of the shaft 5 is fixed to the rotating body 6. The shaft 5 penetrates through the inside of the sleeve 9, and is supported at one end and the other end in the axial direction of the sleeve 9 by bearings 51 and 52, respectively.

  As shown in FIGS. 2 and 4, the yoke 4 has a substantially annular shape. The magnet 7 is pressed into the inner peripheral surface of the yoke 4 (see FIG. 3). The magnet 7 is magnetized such that N poles and S poles are alternately arranged in the circumferential direction. The yoke 4 is made of a magnetic material, and prevents a magnetic field formed by the magnet 7 from leaking outside the magnet 7.

As shown in FIG. 3, the stator 8 is disposed so as to face the first surface 3 a of the circuit board 3, the stator core 81, an insulating member 82 attached to the stator core 81, and the stator core 81 via the insulating member 82. And a coil 83 formed of a wound conductive wire.
In the present embodiment, the magnet 7 and the shaft 5 constitute a rotor. The motor according to the present embodiment is an outer rotor type DC brushless motor in which the rotor is located radially outside the stator 8.

(2) Configuration of Stator 8 of Embodiment Next, the configuration of the stator 8 will be described in more detail with reference to FIGS.
FIG. 5 is an exploded perspective view of the stator 8 excluding the coil 83. FIG. 6 is a plan view of a steel plate constituting the stator core 81 of the motor device 1. FIG. 7 is an enlarged front view of the first insulator 82A when viewed from the yoke 4 side in the axial direction. FIG. 8 is an enlarged front view of the second insulator 82B when viewed from the rotating body 6 side in the axial direction. FIG. 9 is an enlarged front view of the stator 8 (a view when viewed from the yoke 4 side).

FIG. 5 shows a stator core 81, insulating members 82 (first insulator 82A, second insulator 82B), and conduction pins 84. The insulating member 82 is made of resin, and is manufactured by, for example, injection molding.
As shown in FIG. 5, the stator core 81 is a laminated body in which a plurality of magnetic steel sheets are laminated and fixed in the axial direction (the left and right direction in FIG. 3), and has a plurality of teeth 811. In the example of the present embodiment, the teeth 811 are provided at 90-degree intervals in the circumferential direction of the stator core 81.
An inner hole 81h is formed in a central portion of the stator core 81. The inner peripheral surface 81 a of the inner hole 81 h is pressed into the outer peripheral surface of the sleeve 9 when the stator 8 is connected to the sleeve 9. That is, the stator core 81 is attached to the sleeve 9 such that the inner peripheral surface 81a of the inner hole 81h of the stator core 81 contacts the outer peripheral surface of the sleeve 9.

FIG. 6 shows two types of magnetic steel sheets 81p1 and 81p2 constituting the stator core 81. The magnetic steel plates 81p1 and 81p2 are common in that teeth 811p are provided at 90-degree intervals in the circumferential direction and an inner hole 81ph is formed in the center portion, but the presence or absence of a notch 81pd in the peripheral edge of the inner hole 81ph is different. That is, the magnetic steel plate 81p1 shown in FIG. 6A has a notch 81pd formed at the periphery of the inner hole 81ph, whereas the magnetic steel plate 81p2 shown in FIG. 6B has a cutout formed at the periphery of the inner hole 81ph. 81pd is not formed.
As shown in FIG. 5, in the stator core 81, one magnetic steel plate 81p2 without the notch 81pd is arranged on the first insulator 82A side, and the remaining magnetic steel plate 81p1 with the notch 81pd is formed. It is arranged on the second insulator 82B side. For example, as illustrated in FIG. 5, when the stator core 81 is laminated with six magnetic steel plates, one magnetic steel plate 81p2 on the first insulator 82A side and five magnetic steel plates 81p2 on the second insulator 82B side. The magnetic steel sheet 81p1 is in a laminated state.

  As shown in FIG. 5, the insulating member 82 is made of an insulating material such as rubber or resin, and insulates the coil 83 from the teeth 811 and the first insulator 82A that sandwiches the stator core 81 from both sides. It consists of body 82B. The first insulator 82A and the second insulator 82B have an inner hole 82Ah and an inner hole 82Bh into which the sleeve 9 is inserted.

As shown in FIGS. 5 and 7, the first insulator 82A has teeth covers 821A corresponding to the teeth 811 of the stator core 81 at intervals of 90 degrees in the circumferential direction of the inner hole 82Ah. The first insulator 82A has an inner peripheral wall 823A that extends in the axial direction at the periphery of the inner hole 82Ah. That is, the inner peripheral wall 823A extends in the axial direction on the side opposite to the side on which the stator core 81 is provided with reference to the teeth cover portion 821A. The wall portion 822A extends in the axial direction on the side where the stator core 81 is provided with reference to the tooth cover portion 821A.
As shown in FIGS. 5 and 8, the second insulator 82B has a teeth cover portion 821B corresponding to the teeth 811 of the stator core 81 at intervals of 90 degrees in the circumferential direction of the inner hole 82Bh. The second insulator 82B has a cylindrical portion 823B that extends in the axial direction at the periphery of the inner hole 82Bh. That is, the cylindrical portion 823B extends in the axial direction on the side opposite to the side on which the stator core 81 is provided with reference to the teeth cover portion 821B. A wall portion 822B extends in the axial direction on the side where the stator core 81 is provided with reference to the tooth cover portion 821B.
As described above, the first insulator 82A and the second insulator 82B extend along the periphery of the inner hole 81h of the stator core 81 and in the axial direction of the sleeve 9 into which the stator 8 is press-fitted. An inner peripheral wall 823A that separates the coil 811 from the coil 83 and a cylindrical portion 823B are provided. By providing the inner peripheral wall 823A and the cylindrical portion 823B, insulation between the coil 83 and the teeth 811 is reliably performed.

Referring to FIGS. 5 and 7 again, a notch 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. As described later, the notch portion 823Ah is provided to expose the surface of the stator core 81 when the stator 8 is assembled, and to facilitate the press-fitting operation of the stator 8 into the sleeve 9. That is, the first insulator 82A has the notch 823Ah on the periphery of the inner hole 82Ah corresponding to the exposed surface of the stator core 81.
In the notch 823Ah, a projection 823Aj is provided radially outward from the inner peripheral wall 823A. The projection 823Aj is provided to ensure insulation between the coil 83 and the teeth 811 at the notch 823Ah.

Referring to FIGS. 5 and 8, the second insulator 82B has a cylindrical portion 824B that extends in the axial direction and through which the conduction pin 84 passes. The cylindrical portion 824B is supported by a wall portion 822B formed in the axial direction, so that the strength of the cylindrical portion 824B is sufficiently ensured.
Note that the cylindrical portion 823B of the second insulator 82B is not provided with a notch.

After sandwiching the stator core 81 from both sides by the first insulator 82A and the second insulator 82B, a coil is formed by winding a conductive wire around the teeth cover portion 821A, the teeth 811 and the teeth cover portion 821B. The stator 8 is assembled as shown in FIG.
After assembling the stator 8, as shown in FIG. 5, the conductive pin 84 is passed through the cylindrical portion 824 </ b> B, and one end of the conductive pin 84 and one end of the coil 83 are soldered.

(3) Press-fitting of Stator 8 to Sleeve 9 Next, press-fitting of the stator 8 to the sleeve 9 when assembling the motor device 1 of the present embodiment will be described with reference to FIGS. 9 to 11.
FIG. 10 is a view of the assembled state after press-fitting the stator 8 into the sleeve 9 when assembling the motor device 1 of the present embodiment, as viewed from the first surface 3a side of the circuit board 3 in the axial direction. It is. When assembling the motor device 1 of the present embodiment, the circuit board 3 is fixed to the cover 2 before the stator 8 is pressed into the sleeve 9. FIG. 11 is an enlarged sectional view of the structure in the assembled state of FIG.

As shown in FIG. 11, when the stator 8 is press-fitted into the sleeve 9, the inner hole 81 h of the stator core 81 of the stator 8 extends in the axial direction (the press-fit direction D from the first surface 3 a to the second surface 3 b of the circuit board 3). This is performed so that the inner peripheral surface 81a contacts the outer peripheral surface 9a of the sleeve 9. At the time of press-fitting, the cover 2 is fixed to the equipment, and the stator 8 is pressed by a predetermined amount in the press-fitting direction by the press-fitting jig.
As described above, at the time of press-fitting of the stator 8, one end of the conductive pin 84 is in a state of being soldered to the coil 83. Therefore, the operator checks whether or not the end of the conductive pin 84 is soldered. By doing so, erroneous press-fitting of the orientation of the stator 8 is avoided.

In this embodiment, when the stator 8 is pushed in by the press-fitting jig, a part of the stator core 81 is exposed. Therefore, the jig is pressed against the exposed surface of the stator core 81 so that the stator 8 is brought into contact with the sleeve 9. Press-fitting can be performed reliably.
More specifically, as shown in FIG. 9, the stator core 81 of the stator 8 has an exposed surface that is exposed when viewed from the side where the jig is pressed in the axial direction of the sleeve 9. The inner peripheral surface 81 a of the inner hole 81 h of the stator core 81 can be securely pressed into the outer peripheral surface 9 a of the sleeve 9 by making contact and pushing in the axial direction (the direction in the depth of the paper surface of FIG. 9).
The exposed surface of the stator core 81 shown in FIG. 9 includes a peripheral region 811 a along the periphery of the inner hole 81 h of the stator core 81 on the surface of the stator core 81. The peripheral region 811a of the inner hole 81h on the exposed surface is located closest to the outer peripheral surface 9a of the sleeve 9 when the stator 8 is press-fitted into the sleeve 9 on the surface of the stator core 81, so that the jig is pressed into the peripheral region 811a. , The stator 8 can be more securely press-fitted.

  As described with reference to FIG. 7, the notch 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. Therefore, after assembling the first insulator 82A to the stator core 81, as shown in FIG. 9, a protruding region 811p of the exposed surface where the surface of the stator core 81 is exposed through the notch 823Ah is formed. In the present embodiment, the protruding region 811p is a region that protrudes in the radial direction of the stator core 81 from the periphery of the inner hole 81h of the stator core 81.

  If the inner peripheral wall 823A of the first insulator 82A is provided outside the state shown in FIG. 7, the peripheral area 811a of the exposed surface can be widened. However, as shown in FIG. 3, the outer shape of the entire stator 8 cannot be expanded in order to secure a gap between the magnets 7. The size in the radial direction 811 is sacrificed, which affects the performance of the motor. Therefore, a notch 823Ah is locally provided in the inner peripheral wall 823A of the first insulator 82A in the circumferential direction, thereby providing a protruding region 811p of the exposed surface of the stator core 81. Therefore, an effective exposed area can be secured without affecting the performance of the motor.

  In the example of the present embodiment, four protruding regions 811p on the exposed surface are formed along the periphery of the inner hole 81h of the stator core 81. The press-fitting operation is performed by pressing the stator 8 in the press-fitting direction D using a press-fitting jig that simultaneously contacts the four projecting regions 811p of the exposed surface. Since the four projecting regions 811p are located relatively close to the outer peripheral surface 9a of the sleeve 9, the press-fitting of the stator 8 is reliably performed.

  In the example of the present embodiment, the protruding regions 811p of the exposed surface of the stator core 81 are arranged at equal intervals in the circumferential direction of the inner hole 81h of the stator core 81. In this example, protruding regions 811p of the exposed surface of the stator core 81 are provided at four locations between the adjacent teeth 811 of the stator core 81 at equal intervals in the circumferential direction. That is, in FIG. 9, the configuration is such that the protruding region 811p is provided toward a portion where the coil 83 is not wound, so that the influence on the arrangement of the coil 83 in the stator 8 is small.

  As described with reference to FIG. 7, in the first insulator 82A, the projection 823Aj is provided in the notch 823Ah from the inner peripheral wall 823A to the outside in the radial direction. Therefore, when the stator 8 is assembled, as shown in FIG. 9, the protrusion 823Aj of the first insulator 82A is configured to surround at least a part of the protruding region 811p on the exposed surface of the stator core 81. Therefore, insulation between the tooth 811 and the coil 83 in the protruding region 811p is reliably performed.

  Note that, unlike the inner peripheral wall 823A of the first insulator 82A, the cylindrical portion 823B of the second insulator 82B is not provided with a notch. Therefore, in a state where the stator 8 is assembled, when the stator 8 is viewed from the second insulator 82B side, a projecting region projecting radially outward from the inner hole 81h is not formed on the exposed surface of the stator core 81. That is, the protruding region is provided only on the surface of the stator core 81 on the first insulator 82A side in the axial direction of the sleeve 9, and is not provided on the surface of the stator core 81 on the second insulator 82B side in the axial direction of the sleeve 9. . Therefore, by checking the exposed surfaces of the stator core 81 on both sides of the stator 8, the operator can also prevent erroneous assembly in which the direction of the stator 8 is erroneous when press-fitting the sleeve 9.

(4) Sealing when Stator 8 is Press-Fit into Sleeve 9 When the stator 8 is press-fitted into the sleeve 9, the inner peripheral surface of the stator 8 and the outer peripheral surface of the sleeve 9 are strongly rubbed with each other, so that chips (cut chips) are generated. May occur. In this case, if the generated chips move to the outside of the stator core 81, an unexpected problem may occur. Therefore, the motor device 1 of the present embodiment is configured such that chips generated at the time of press-fitting do not move to the outside of the stator core 81.

FIG. 12 shows a cross-sectional view of the stator and the sleeve after the stator is pressed into the sleeve. In FIG. 12, the illustration of the coil 83 is omitted.
As shown in FIG. 12, among a plurality of magnetic steel plates forming the stator core 81, a plurality of magnetic steel plates 81p1 are arranged on the second insulator 82B side (an example of the first side) which is one end side in the axial direction of the stator core 81. Then, one magnetic steel plate 81p2 is arranged on the first insulator 82A side (an example of the second side) which is the other end side in the axial direction. When the stator 8 is press-fitted into the sleeve 9, the press-fitting is performed along the press-fit direction D in FIG. 12.
As shown in FIG. 6, the plurality of magnetic steel sheets 81p1 on the side of the second insulator 82B have notches 81pd formed at the same positions on the periphery of the inner hole 81ph, thereby forming a recess 81d as a whole. You.
The recess 81 d formed when a plurality of magnetic steel plates are stacked is set on a rod-shaped jig (not shown) in the step of winding the coil 83 and used for positioning the stator core 81. The one magnetic steel sheet 81p2 on the first insulator 82A side has no notch 81pd, but the height of the rod-shaped jig is lower than the stacked height of the plurality of magnetic steel sheets 81p1. The steel plate 81p2 does not hinder the positioning.

In the present embodiment, one magnetic steel plate 81p2 on the first insulator 82A side seals so that chips generated when the stator 8 is pressed into the sleeve 9 are not moved to the outside. Assuming that all the magnetic steel plates have the notch 81pd, the chips generated due to strong rubbing between the inner peripheral surface of the stator 8 and the outer peripheral surface of the sleeve 9 can be removed using the notch of the magnetic steel plate as a passage. It is discharged to the outside on the 4 side. On the other hand, in the motor device 1 of the present embodiment, since the magnetic steel plate 81p2 without the notch 81pd is arranged on the first insulator 82A side, generated chips are sealed by the magnetic steel plate 81p2.
Therefore, according to the motor device 1 of the present embodiment, the sealing performance of chips generated by press-fitting the stator into the cylindrical member can be improved, and an unexpected problem caused by chips can occur. Properties can be reduced.

(5) Application Example of Motor Device 1 of Present Embodiment Next, as an application example of the above-described motor device 1 of the present embodiment, an outline of a vehicle headlight on which the motor device 1 of the present embodiment can be mounted will be described. This will be described with reference to FIG. FIG. 13 is a horizontal sectional view of a vehicle headlamp. The vehicle headlamp 10 shown in FIG. 13 is a left headlamp mounted on the left side of the front end of the vehicle, and has the same structure as the headlamp mounted on the right side except that it is bilaterally symmetric. Therefore, hereinafter, the left vehicle headlamp 10 will be described in detail, and the description of the right vehicle headlamp will be omitted.

  As shown in FIG. 13, the vehicular headlamp 10 includes a lamp body 12 having a concave portion that opens forward. The lamp body 12 has a front opening covered with a transparent front cover 14 to form a lamp chamber 16. The light room 16 functions as a space in which the lamp unit 18 is housed.

  The lamp unit 18 is a unit that employs a blade scan type ADB (Adaptive Driving Beam) technology, and is configured to emit a so-called variable high beam. The lamp unit 18 includes an optical unit 20 and a projection lens 27. The optical unit 20 includes a rotating reflector 60 and the light source 26. As the projection lens 27, for example, a convex lens is used. The shape of the convex lens may be appropriately selected according to the light distribution characteristics such as a required light distribution pattern and illuminance distribution, and an aspheric lens or a free-form surface lens is used. An extension reflector 23 is provided around the projection lens 27.

  The rotating reflector 60 reflects light emitted from the light source 26 while the blade 60b rotates in one direction around the rotation axis R by the motor 30 as a driving source, and scans the reflected light to form a light distribution pattern. Are formed. Further, the blade 60b includes an annular reflection region 60a configured to reflect the light emitted from the light source 26 while rotating, and to form a desired light distribution pattern.

  The shape of the blade 60b of the rotary reflector 60 is configured such that the secondary light source of the light source 26 due to reflection is formed near the focal point of the projection lens 27. The blade 60b has a shape twisted such that the angle formed by the optical axis Ax and the reflection surface changes in the circumferential direction around the rotation axis R. Thereby, scanning using light (light source image) of the light source 26 becomes possible.

  The light source 26 is preferably capable of controlling turning on and off in a short time. For example, a semiconductor light emitting element such as an LED, an LD, and an EL element is suitable.

  The motor 30 is mounted on a board 92. The substrate 92 is mounted and fixed on a mounting surface 94a of the heat sink 94. The mounting surface 94a is configured such that the rotation axis R of the rotary reflector 60 is inclined with respect to the optical axis Ax or the forward direction of the vehicle when the substrate 92 is mounted.

  The light source 26 is mounted on a substrate 36. A lens 38 as a primary optical system is provided between the light source 26 and the rotary reflector 60 in the light emission direction. The lens 38 condenses the light emitted from the light source 26 so that the light emitted from the light source 26 goes to the reflection area 60 a of the rotary reflector 60. The substrate 36 is mounted on the heat sink 40. The heat sink 94 and the heat sink 40 are fixed to a metal plate-shaped support member 42. The lamp unit 18 is supported by a means using an aiming screw 44 and a nut 46 via a support member 42 so as to be tiltable with respect to the lamp body 12.

  The control circuit 48 is connected to the light source 26 and the motor 30 via the respective boards, and transmits a signal for controlling the light source 26 and the motor 30 and receives a signal output from the motor 30.

  In the vehicle headlamp 10, the rotating reflector 60 corresponds to the rotating body 6 of the motor device 1 of the present embodiment, and the motor 30 corresponds to the motor of the motor device 1 of the present embodiment. As described above, the motor device 1 of the present embodiment is applicable to the vehicle headlamp 10.

As mentioned above, although the embodiment of the motor device of the present invention was described in detail, the scope of the present invention is not limited to the above-mentioned embodiment. Further, the above-described embodiment can be variously improved or changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the stator core 81 is configured by arranging one magnetic steel plate 81p2 on the first insulator 82A side, but the present invention is not limited thereto. Two or more magnetic steel plates 81p2 may be arranged on the first insulator 82A side as long as there is no interference with the rod-shaped jig used in the step of winding the coil 83.

  DESCRIPTION OF SYMBOLS 1 ... Motor device, 2 ... Cover, 2b ... Reference surface, 21 ... Substrate arrangement part, 24 ... Opening, 24W ... Wall surface, 241 ... Slope surface, 242 ... Orthogonal surface, 3 ... Circuit board, 3a ... First surface, 3b ... Second surface, 32, 34 ... Through hole, 4 ... Yoke, 41 ... Support, 5 ... Shaft, 51, 52 ... Bearing, 53 ... Coil spring, 6 ... Rotating body, 7 ... Magnet, 8 ... Stator, 81 ... stator core, 81h ... inner hole, 81a ... inner peripheral surface, 81d ... dent, 811 ... teeth, 811a ... peripheral region, 811p ... projecting region, 812 ... teeth wall surface, 81p1, 81p2 ... magnetic steel plate, 81pd ... notch, 81ph ... inner hole, 811p ... teeth, 82 ... insulating member, 82A ... first insulator, 82Ah ... inner hole, 821A ... teeth cover portion, 822A ... wall portion, 823A ... inner peripheral wall surface, 823Ah ... notch portion, 8 3Aj: protrusion, 82B: second insulator, 82Bh: inner hole, 821B: teeth cover portion, 822B: wall portion, 823B: cylindrical portion, 824B: cylindrical portion, 822B: wall portion, 83: coil, 84: conduction Pin, 9 ... Sleeve, 9a ... Outer peripheral surface, 10 ... Headlight for vehicle, 12 ... Lamp body, 14 ... Front cover, 16 ... Light room, 18 ... Lamp unit, 20 ... Optical unit, 27 ... Projection lens, 30 ... Motor, 60 rotary reflector, 60a reflection area, 60b blade, 26 light source, 92 substrate, 40, 94 heat sink, 94a mounting surface, 36 substrate, 38 lens, 42 support member, 44 ... Aiming screw, 46 ... Nut

Claims (2)

A cylindrical member;
A stator including: a stator core having an inner hole; an insulating member attached to the stator core; and a coil formed of a conductive wire wound around the stator core via the insulating member.
With
The stator core is attached to the cylindrical member such that the inner peripheral surface of the stator core contacts the outer peripheral surface of the cylindrical member,
The stator core is a laminate in which a plurality of steel plates having inner holes are laminated in the axial direction,
Of the plurality of steel plates, a notch is formed at the same position on the periphery of the inner hole in a part of the steel plate on the first side that is one end side in the axial direction of the stator core.
Motor device. The stator core is attached to the cylindrical member by pressing the stator core into the cylindrical member from a second side, which is the other end of the stator core in the axial direction, toward the first side.
The motor device according to claim 1.

Images