JP2018164368A - motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of improving operability in work of connecting a lead wire drawn out from a coil to a land.SOLUTION: The motor includes: a rotary part that rotates about a central axis; and a stationary part opposing the rotary part in a radial direction and rotatably supporting the rotary part. The stationary part has a coil, a pin 214 extending in an axial direction, and a substrate 22 having a land 222 electrically connected to a lead wire 25 drawn out from the coil on one end side in the axial direction. The substrate has a hole 221 extending in the axial direction and having a conductive wire and a pin passed therethrough. The pin has a protruding portion 2142 protruding from one end side in the axial direction of the substrate. The conductive wire has an end portion 251 drawn out to one axial end side of the substrate. The protruding portion has an overhanging portion 2142a overlapping with at least a part of the periphery of the hole portion of the substrate in plan view from the axial direction. The end portion is sandwiched between the overhanging portion and the substrate.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a motor.

  In Japanese Utility Model Laid-Open No. 4-68463, an insulator in which a protrusion for positioning a printed circuit board is formed, a land for soldering around a notch hole in the printed circuit board into which the protrusion is inserted, and the protrusion are wound around, There is disclosed a stator of a resin mold motor having a winding end of a stator wire fixed by soldering to the soldering land. The winding terminal is wound and fixed to the soldering land after being wound from the root of the protrusion of the insulator toward the tip.

Japanese Utility Model Publication No. 4-68463

  In the configuration of Japanese Utility Model Publication No. 4-68463, the winding terminal drawn out to the land side through the cutout hole can freely move. For this reason, if the winding terminal is not fixed by, for example, a human hand or a jig, the winding terminal may easily move during the soldering fixing, and it may be difficult to perform the soldering fixing operation of the winding terminal.

  In view of the above points, an object of the present invention is to provide a motor capable of improving workability of an operation of connecting a conductor drawn from a coil to a land.

  An exemplary motor of the present invention includes a rotating portion that rotates about a central axis, and a stationary portion that is opposed to the rotating portion in the radial direction and supports the rotating portion so as to be rotatable. The stationary portion includes a coil, a pin extending in the axial direction, and a substrate having a land on one end side in the axial direction that is electrically connected to a conductive wire drawn from the coil. The substrate extends in the axial direction and has a hole through which the conductive wire and the pin are passed. The pin has a protruding portion protruding from one end side in the axial direction of the substrate. The conducting wire has an end portion which is led out to one end side in the axial direction of the substrate. The projecting portion has an overhanging portion that overlaps at least a part of the periphery of the hole portion of the substrate in a plan view from the axial direction. The end portion is sandwiched between the protruding portion and the substrate.

  According to the exemplary present invention, it is possible to provide a motor capable of improving the workability of the work of connecting the lead wire drawn from the coil to the land.

FIG. 1 is a diagram showing a schematic configuration of a motor according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing the configuration of the stator. FIG. 3 is a schematic perspective view showing a configuration in which a substrate is arranged on the stator. FIG. 4 is a schematic cross-sectional view showing a configuration around the pin before processing the pin. FIG. 5 is a schematic plan view showing a configuration around the pin before processing the pin. FIG. 6 is a schematic cross-sectional view showing a configuration around the pin after the pin is processed. FIG. 7 is a schematic plan view showing a configuration around the pin after the pin is processed. FIG. 8 is a schematic cross-sectional view showing the configuration of the conducting wire. FIG. 9 is a schematic cross-sectional view showing a first modification of the configuration around the pin. FIG. 10 is a schematic cross-sectional view showing a second modification of the configuration around the pin. FIG. 11 is a schematic plan view showing a third modification of the configuration around the pins. FIG. 12 is a schematic cross-sectional view showing a configuration of a fourth modification of the motor of the present embodiment. FIG. 13: is a schematic sectional drawing which shows the structure of the surroundings of the pin of a 4th modification.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the extending direction of the central axis A of the motor shown in FIG. 1 is simply referred to as “axial direction”, and the radial direction and the circumferential direction around the central axis A of the motor are simply “radial direction” and “circumferential direction”. I will call it. In this specification, the axial direction when the motor is arranged in the direction shown in FIG. 1 is defined as the vertical direction. The vertical direction is simply a name used for explanation, and does not limit the actual positional relationship or direction.

<1. General configuration of motor>
First, a schematic configuration of a motor according to an exemplary embodiment of the present invention will be described. FIG. 1 is a diagram showing a schematic configuration of a motor 1 according to an embodiment of the present invention. In FIG. 1, the left half is a sectional view and the right half is a side view. The motor 1 has a rotating part 10 and a stationary part 20.

  The rotating unit 10 rotates about the central axis A. The rotating unit 10 includes a shaft 11 and a rotor 12. The shaft 11 is a columnar member extending in the axial direction. The rotor 12 is disposed radially outward of the shaft 11. The rotor 12 has a rotor core 121 and a magnet part 122. The cylindrical rotor core 121 is configured by stacking magnetic steel plates, for example. However, the rotor core 121 may be formed by processing a cylindrical or columnar magnetic material, for example. The shaft 11 is press-fitted into the center of the rotor core 121. The magnet part 122 is fixedly arranged on the outer side in the radial direction of the rotor core 121. The magnet part 122 is configured such that the N pole and the S pole are aligned in the circumferential direction. The magnet part 122 may be comprised by the some permanent magnet arranged in the circumferential direction, for example, and may be comprised by one cylindrical permanent magnet.

  The stationary part 20 faces the rotating part 10 in the radial direction. Specifically, the stationary part 20 is disposed radially outward of the rotating part 10. The stationary part 20 supports the rotating part 10 to be rotatable. The stationary part 20 includes a stator 21, a substrate 22, a resin part 23, and bearings 24a and 24b. The stator 21 is an armature of the motor 1. FIG. 2 is a schematic perspective view showing the configuration of the stator 21.

  As shown in FIG. 2, the stator 21 has an annular shape. The stator 21 is disposed radially outward of the rotor 12 and faces the rotor 12 in the radial direction. The stator 21 includes a stator core 211, a coil 212, an insulator 213, and a pin 214. In other words, the stationary part 20 includes the stator core 211, the coil 212, the insulator 213, and the pin 214.

  The stator core 211 is configured by laminating magnetic steel plates, for example. The stator core 211 has an annular core back 211a and a plurality of teeth 211b protruding radially inward from the core back 211a. For example, the stator core 211 may be configured by joining a plurality of core pieces having a core back and teeth in the circumferential direction.

  The coil 212 is configured by winding a conductive wire around each tooth 211b via an insulator 213. A plurality of coils 212 are arranged in the circumferential direction. In the present embodiment, the motor 1 is a brushless DC motor, and the coil 212 has U-phase, V-phase, and W-phase coils. The motor 1 is not limited to a brushless DC motor, and may be, for example, a three-phase AC motor.

  The insulator 213 is an insulating resin member that electrically insulates the stator core 211 and the coil 212. The insulator 213 covers at least a part of the stator core 211. The insulator 213 may be integrated with the stator core 211 by insert molding with the stator core 211, for example. The insulator 213 may be a separate member from the stator core 211. In this case, the insulator 213 may be composed of, for example, two members that are placed on the stator core 211 from above and below.

  The pin 214 extends in the axial direction. In this embodiment, the pin 214 is made of resin. Specifically, the pin 214 and the insulator 213 are a single member. According to this embodiment, since the pin 214 and the insulator 213 are a single member, the work of attaching the pin to the insulator can be eliminated, and the work burden can be reduced. Since the pin 214 and the insulator 213 are one member, it is possible to prevent a situation in which the fixing strength of the pin with respect to the insulator is insufficient. The pin 214 may be a separate member from the insulator 214. In this case, the pin 214 may be made of resin or metal, for example. The pin 214 is a guide member for guiding the lead wire drawn out from the coil 212 toward a land on a substrate to be described later. In the present embodiment, three pins 214 are provided to guide each lead wire drawn from the coil 212 of each phase of the U phase, V phase, and W phase toward the land on the substrate. Details of the other pins 214 will be described later.

  As shown in FIG. 1, the substrate 22 is disposed on the upper side of the stator 21. The substrate 22 has an electronic circuit for supplying a current to the coil 212. FIG. 3 is a schematic perspective view showing a configuration in which the substrate 22 is disposed on the stator 21. In the present embodiment, the substrate 22 is disposed on a partial region of the stator 21 in the circumferential direction. However, the substrate 22 may be disposed over the entire circumference of the stator 21 in the circumferential direction. It is preferable that the board | substrate 22 is fixed by the nail | claw part 213a provided in the insulator 213, for example. The claw portion 213a may extend in the circumferential direction or in the radial direction. The nail | claw part 213a can suppress that the board | substrate 22 floats to an axial direction by contacting the upper surface of the board | substrate 22. FIG.

  The substrate 22 has a hole 221 extending in the axial direction. As described later, the lead wire 214 and the pin 214 drawn from the coil 212 are passed through the hole portion 221. In the present embodiment, the substrate 22 has three holes 221 corresponding to the number of pins 214. Specifically, the hole 221 has a notch shape in which an opening 221a is provided in a part of the periphery. However, the hole portion 221 may be a through hole in which an opening is not provided in a part of the periphery such as a round hole. When the hole 221 is provided in a notch shape, when the pin 214 is passed through the hole 221, the substrate 22 can be brought closer not only from the axial direction but also from, for example, an oblique direction, thereby improving workability. it can. Details of other substrates 22 will be described later.

  The resin part 23 covers the substrate 22. In the present embodiment, the resin portion 23 covers a part of the stator 21 together with the substrate 22. In other words, the resin portion 23 is a bottomed cylindrical case that seals the stator 21 and the substrate 22. The resin portion 23 can prevent foreign matters such as water and dust from adhering to the stator 21 and the substrate 22.

  The bearings 24a and 24b support the shaft 11 to be rotatable. In the present embodiment, the bearings 24 a and 24 b are arranged above and below the rotor 12. Specifically, the bearings 24a and 24b are ball bearings, but are not limited thereto, and may be sleeve bearings or the like.

  In the motor 1, when a current is supplied to the coil 212 at a predetermined timing, a radial magnetic flux is generated in the tooth 211b. The magnetic field formed by this magnetic flux and the magnetic field of the permanent magnet 122 act to generate torque in the circumferential direction of the rotor 12. With this torque, the shaft 11 together with the rotor 12 rotates about the central axis A.

  In the present embodiment, the motor 1 has an inner rotor structure in which the rotor 12 is positioned radially inward of the stator 21, but this is an example. The motor 1 may have an outer rotor structure in which the rotor is positioned radially outward of the stator.

<2. Detailed configuration around pin>
(2-1. Configuration before pin processing)
In the present embodiment, the pin 214 is processed during the manufacture of the motor 1. FIG. 4 is a schematic cross-sectional view showing the configuration around the pin 214 before processing. FIG. 5 is a schematic plan view showing a configuration around the pin 214 before processing. 4 and 5 corresponds to the radial direction. Moreover, the pin 214 shown in FIGS. 2 and 3 is a pin before being processed.

  As shown in FIGS. 4 and 5, in the present embodiment, the pin 214 has a cylindrical shape. However, the pin 214 may have another shape such as a prism shape. The pin 214 is passed through the hole portion 221, and the upper portion projects upward from the substrate 22. 4 and 5, the broken line indicates the conductive wire 25 drawn from the coil 212. The conducting wire 25 is also passed through the hole 221. Specifically, a part of the conductive wire 25 led out from the coil 212 positioned on the lower side of the substrate 22 passes through the hole 221 and is positioned on the upper side of the substrate 22.

  The pin 214 has a groove 2141 extending in a direction including the axial component. The shape of the groove 2141 is not particularly limited, but for example, the cross-sectional shape of the groove 2141 is configured in a U shape, a V shape, or the like. By providing the groove portion 2141 on the pin 214, the conducting wire 25 can be pulled out above the hole portion 221 along the groove portion 2141. In addition, a part of the conducting wire 25 can be fixed by wiring the conducting wire 25 in the groove portion 2141. For this reason, workability | operativity of the operation | work which pulls out the conducting wire 25 to the upper side of the board | substrate 22 can be improved. In this embodiment, since the pin 214 is made of resin, the groove portion 2141 can be easily formed by resin molding.

  In the present embodiment, the groove 2141 is a linear groove extending in the axial direction. The straight groove 2141 is easy to form on the pin 214. For example, when the pins 214 are formed by resin molding, the pins 214 having the groove portions 2141 can be easily formed using upper and lower molds. As a configuration different from that of the present embodiment, the linear groove portion may extend while being inclined with respect to the axial direction. Further, the groove is not limited to a straight line, and may be, for example, a spiral. The spiral is a shape extending around the pin 214 spirally. In some cases, the groove may not be provided. Even in this case, the pin 214 exhibits a guide function for guiding the conductive wire 25 to the land on the substrate 22.

  The pin 214 preferably has a linear groove 2141 on at least one of the inner side and the outer side in the radial direction. According to this, since the conducting wire 25 can be wired to the linear groove portion 2141 and guided to the land on the substrate 22, the amount of winding the conducting wire 25 around the pin 214 can be reduced, and the upper side of the substrate 22 can be reduced. It is possible to reduce the variation in the amount of the lead wire 25 drawn out. For example, when the groove portion 2141 is not provided, there is no mark as to which position on the pin 214 the winding wire 25 should be wound. For this reason, there is a possibility that the amount of winding the conductive wire 25 around the pin 214 varies depending on the operator. When the groove portion 2141 is provided on the pin 214 as in this configuration, it is easy for the operator to know which position and how much the conductor 25 should be wired, and that the amount of use of the conductor 25 varies. Can be reduced.

  In the present embodiment, the linear groove portion 2141 is disposed only on the radially inner side. The linear groove 2141 extends from the lower end to the upper end of the pin 214. However, the range in which the linear groove portion 2141 is provided may be a part of the range from the upper end to the lower end of the pin 214. For example, the linear groove 2141 may be from the lower end of the pin 214 to slightly above the upper surface of the substrate 22.

  As shown in FIGS. 4 and 5, the substrate 22 has a land 222 electrically connected to the conductive wire 25 on one end side in the axial direction. Specifically, the land 222 is provided on the upper surface of the substrate 22. The land 222 is preferably provided on at least a part of the periphery of the hole 221. In the present embodiment, the land 222 has a rectangular shape. However, the land 222 is not limited to a rectangular shape, and may be, for example, a ring shape, a semi-ring shape, or a horseshoe shape. The ring-shaped land is an example assuming that the hole is a through hole such as a round hole. In the present embodiment, the land 222 is located on the radially inner side of the hole 221.

  Specifically, the hole 221 of the substrate 22 has a shape in which the end surface on the radially outer side of the substrate 22 is recessed in a U shape radially inward. Specifically, the substrate 22 has a recess 223 that is recessed in the direction orthogonal to the axial direction on the inner surface of the hole 221. The recess 223 extends from the end surface on one side in the axial direction of the substrate 22 to the end surface on the other side in the axial direction. Specifically, the recess 223 extends from the upper surface to the lower surface of the substrate 22. The recess 223 can be used as a guide when the lead wire 25 is pulled out to the upper side of the substrate 22 along the pin 214. Moreover, the recessed part 223 can be made into the space where at least one part of the conducting wire 25 enters. Therefore, the possibility that the conducting wire 25 is sandwiched between the pin 214 and the substrate 22 and is disconnected can be reduced. Note that the recess 223 may not be provided in the substrate 22 in some cases.

  The recess 223 is preferably provided at a position facing the groove 2141. Thereby, the conducting wire 25 can be guided toward the land 222 by both the groove 2141 and the recess 223. In the present embodiment, the recess 223 is formed by denting a position of the surface constituting the hole 221 facing the groove 2141 in the radial direction. In the present embodiment, the recess 223 has a semi-elliptical shape in plan view from the axial direction. However, the recess 223 may have a different shape such as a semicircular shape or a rectangular shape in a plan view from the axial direction. The size of the recess 223 may be changed as appropriate, but for example, it is preferable that the size is such that a part of the conductor 25 can enter.

  At least a part of the land 222 is opposed to the recess 223 in the radial direction in plan view from the axial direction. As a result, the land 222 can be positioned in the vicinity of the conducting wire 25 drawn out to the upper side of the substrate 22 through the conducting wire 25 in the recess 223, and the conducting wire 25 and the land 222 can be easily electrically connected. In the present embodiment, a part of the rectangular land 222 is opposed to the groove 2141 provided on the radially inner side of the pin 214 in the radial direction, and a part of the land 222 and the recess 223 are also opposed to the radial direction. Yes.

(2-2. About pin processing)
Here, an example of processing of the pin 214 performed at the time of manufacturing the motor 1 will be described with reference to FIGS. 4 and 5. A part of the conducting wire 25 drawn out from the coil 212 is guided from the lower side to the upper side of the pin 214. In the present embodiment, a part of the conductive wire 25 is wired in the linear groove portion 2141 and guided from the lower side to the upper side of the pin 214. The diameter of the conducting wire 25 is preferably slightly larger than the width of the linear groove portion 2141. As a result, the conductive wire 25 can be sandwiched between the pair of side walls facing each other in the circumferential direction constituting the linear groove portion 2141 that is elastically deformed, and a part of the conductive wire 25 can be fixed to the linear groove portion 2141. That is, since the conducting wire 25 can be fixed to the pin 214 without being manually pressed by the linear groove portion 2141, the conducting wire 25 can be processed efficiently. The width of the linear groove portion 2141 referred to here is the width in the circumferential direction.

  Next, the pin 214 and the conductive wire 25 are passed through the hole 221 of the substrate 22. As a result, the upper portion of the pin 214 projects upward from the substrate 22. The end of the conductive wire 25 is drawn upward from the substrate 22. FIG. 4 and FIG. 5 described above show this state. In the present embodiment, since the hole 221 has a notch shape, the substrate 22 can be brought closer to the pin 214 obliquely from above and the inner surface of the hole 221 can be pressed against the pin 214. For this reason, the distance between the pin 214 and the substrate 22 can be as close as possible.

  Next, the upper part of the pin 214 is heat caulked. Since the pin 214 is made of resin, the upper part of the pin 214 can be melted by heat caulking. The heat caulking is performed, for example, by pressing a heat source onto the upper portion of the pin 214. In the present embodiment, as described above, since the hole 221 has a notch shape, the distance between the pin 214 and the substrate 22 can be easily reduced, and a part of the melted pin 214 can be placed on the substrate 22. it can.

  In the heat caulking, it is preferable that the heat source is pressed against the pins 214 in a direction in which many melted pins 214 are to be placed on the substrate 22. In the present embodiment, the hole 221 has a notch shape that is recessed radially inward, and the land 222 is provided on the radially inner side of the hole 221. For this reason, in this embodiment, the heat source is pressed radially inward against the upper portion of the pin 214. Thereby, a part of the melted pin 214 can be placed on the substrate 22 in the vicinity of the land 222. In addition, the arrow X shown in FIG.4 and FIG.5 points out radial direction inner side.

  In the present embodiment, the pin 214 is made of resin so that heat caulking is performed. However, as described above, the pin 214 may be made of metal. When the pin 214 is made of metal, for example, the pin 214 may be mechanically caulked using a hollow pipe member.

(2-3. Configuration after pin processing)
FIG. 6 is a schematic cross-sectional view showing the configuration around the pin 214 after processing the pin 214. FIG. 7 is a schematic plan view showing the configuration around the pin 214 after processing. 6 and 7 corresponds to the radial direction.

  As shown in FIGS. 6 and 7, the pin 214 has a protruding portion 2142 that protrudes from one side of the substrate 22 in the axial direction. Specifically, the protruding portion 2142 protrudes from the upper surface of the substrate 22. The protrusion 2142 has an overhanging portion 2142a that overlaps at least a part of the periphery of the hole 221 of the substrate 22 in a plan view from the axial direction. In the present embodiment, the overhanging portion 2142a overlaps a part of the periphery of the hole portion 221 of the substrate 22 in a plan view from the axial direction. Specifically, the overhanging portion 2142a largely overlaps the substrate 22 on the side close to the land 222 in a plan view from the axial direction.

  The protrusion 2142 is wider in the direction perpendicular to the axial direction than the portion 214a passing through the hole 221 of the pin 214. Such a configuration can be formed by subjecting the upper portion of the pin 214 to heat caulking, mechanical caulking, or the like. In the present embodiment, the projecting portion 2142a is formed by the upper part of the cylindrical pin 214 being pushed and spread by heat caulking. That is, due to the formation of the overhanging portion 2142a, the protruding portion 2142 has a wider configuration in the direction orthogonal to the axial direction than the portion 214a passing through the hole 221 of the pin 214. In addition, the protrusion part 2142 does not necessarily need to be the structure expanded. The overhang portion 2142a may be a portion protruding from the side surface of the pin 214.

  The overhang portion 2142a includes a top surface 2143 located on one side in the axial direction of the pin 214. Specifically, the top surface 2143 is the upper end surface of the pin 214, and is a curved surface that is convex upward in this embodiment. In such a configuration, the height of the protruding portion 2142 in the axial direction can be reduced. In other words, the protrusion amount of the pin 214 from the upper surface of the substrate 22 can be reduced. For this reason, the axial thickness of the motor 1 can be reduced.

  The conducting wire 25 and the pin 214 are passed through the hole 221. The conducting wire 25 has an end portion 251 drawn out to one side in the axial direction of the substrate 22. In detail, the end portion 251 of the conducting wire is drawn to the upper side of the substrate 22. The end portion 251 of the conducting wire is a portion having a length including the outermost end of the conducting wire 25. In the present embodiment, a part of the conductive wire 25 is wired to the linear groove portion 2141 at least on the lower side of the substrate 22. In other words, the pin 214 has a linear groove 2142 at least on the lower side of the substrate 22.

  The end portion 251 of the conducting wire is sandwiched between the overhanging portion 2142a and the substrate 22. Specifically, the end portion 251 of the conducting wire is sandwiched between the lower surface of the overhang portion 2142 a and the upper surface of the substrate 22. By this pinching, the end portion 251 of the conducting wire can be fixed. In some cases, a part of the melted pin 214 may enter between the end portion 251 of the conducting wire and the upper surface of the substrate 22.

  The conductive wire 25 is electrically connected to the land 222. The leading end side of the end portion 251 of the conducting wire is connected to the land 222 by the conductive member 26. In the present embodiment, the conductive member 26 is solder. FIG. 8 is a schematic cross-sectional view showing the configuration of the conducting wire 25. As shown in FIG. 8, the conducting wire 25 includes a core wire 25a and an insulating member 25b that covers the core wire 25a. In the present embodiment, the core wire 25a is an aluminum wire. The core wire 25a may be made of another material such as a copper wire. However, weight reduction of the motor 1 can be achieved by using an aluminum wire for the core wire 25a.

  The insulating member 25b may be removed before the end portion 251 of the conducting wire is electrically connected to the land 222 using the solder 26, but it may not be removed. This is because the insulating member 25b is melted by the heat of the solder when soldering, and the electrical connection between the core wire 25a and the land 222 can be ensured.

  According to the configuration of this embodiment, the end portion 251 of the conducting wire can be fixed near the land 222 by the overhang portion 2142a. For this reason, when electrically connecting the conducting wire 25 and the land 222, the end portion 251 of the conducting wire is difficult to move, and the workability of the work of connecting the two can be improved. Further, according to the configuration of the present embodiment, the pin 214 and the substrate 22 can be fixed by forming the overhanging portion 2142a. Also from this point, the workability of the work of electrically connecting the conductive wire 25 and the land 222 can be improved.

  Further, in the configuration of the present embodiment, since the end portion 251 of the conducting wire is fixed by the overhanging portion 2142a, the reliability of the motor 1 is reduced even when an aluminum wire having a weaker strength than a copper wire is used. Can be suppressed. For example, when the end portion 251 of the conducting wire is not sandwiched between the projecting portion 2142a and the substrate 22, the conducting wire 25 has fulcrums at the end portion on the coil 212 side and the end portion on the land 222 side. A portion between these two fulcrums bends, and resin pressure may be applied to the bent portion during the molding process. In this regard, in the configuration of the present embodiment, since the conductive wire 25 is sandwiched between the projecting portion 2142a and the substrate 22, one fulcrum is added between the two fulcrums described above. For this reason, possibility that the conducting wire 25 will bend can be suppressed. In other words, since the overhanging portion 2142a is provided at a place where there is a possibility of bending, the distance between the fulcrums can be shortened, and there is a possibility that the resin wire 25 is subjected to pressure by the resin during the molding process. Can be reduced.

<3. Modification>
(3-1. First Modification)
In the embodiment described above, the pin 214 is configured to have the linear groove portion 2141 on the radially inner side. However, the pin 214 may have the linear groove 214 only on the radially outer side, or on the radially inner side and the radially outer side. FIG. 9 shows the latter example. FIG. 9 is a schematic cross-sectional view showing a first modification of the configuration around the pin 214. FIG. 9 shows a state before the pin 214 is heat staked.

  In the first modification shown in FIG. 9, the pin 214 has linear groove portions 2141 a and 2141 b extending in the axial direction on the radially inner side and the outer side of the pin 214. The two linear grooves 2141a and 2141b extend from the lower end to the upper end of the pin 214. However, the range in which the two linear groove portions 2141a and 2141b extend may be changed as appropriate. For example, the linear groove 2141a on the radially inner side may not be provided below the substrate 22 and may be provided only above the substrate 22. The pin 214 has a connecting groove portion 2141c that connects the linear groove 2141a on the radially inner side and the linear groove portion 2141b on the radially outer side on the upper end surface of the pin 214. In this modification, the connecting groove 214c extends linearly in the radial direction.

  In the configuration of the present modification, the conductor 25 drawn from the coil 212 can be guided along the grooves 2141a, 2141b, and 2141c from the radially outer side of the pin 214 to the inner end 251 of the conductor. It can be easily guided to the land 222. Further, in the configuration of the present modification, since the conducting wire 25 does not have to be wound around the pin 214, variation in the length of the end portion 251 of the conducting wire drawn out to the upper end side of the substrate 22 can be reduced.

(3-2. Second Modification)
In the embodiment described above, the conductive wire 25 is wired along the groove 2141 provided in the pin 214 and is not wound around the pin 214. FIG. 10 is a schematic cross-sectional view showing a second modification of the configuration around the pin 214. FIG. 10 shows the state after the pin 214 has been heat staked. As shown in FIG. 10, a part of the conductive wire 25 may be wound around a pin 214. Thereby, it is possible to make it difficult for the lead wire 25 to come off the pin 214.

  In the configuration shown in FIG. 10, the conductive wire 25 is wound a plurality of times along the outer periphery of the pin 214. By winding the conducting wire 25 around the pin 214 a plurality of times, the possibility that the conducting wire 25 can be unwound from the pin 214 can be reduced. Thus, the end portion 215 of the conducting wire can be easily sandwiched between the substrate 22 and the overhang portion 2142a. However, the conducting wire 25 may be wound only once along the outer periphery of the pin 214. Moreover, the conducting wire 25 wound around the pin 214 a plurality of times may be wound at intervals, or may be wound without intervals. Further, the conductive wire 25 may be wound along the outer periphery of the pin 214 by an amount smaller than one turn, such as a half turn. Even when the conducting wire 25 is wound around the pin 25 by one turn or less than one turn, the effect of making it difficult to unwind the conducting wire 25 from the pin 214 is obtained, and further, the work around the pin 214 becomes complicated. Can be suppressed. Further, even when the conducting wire 25 is wound around the pin 214, the pin 214 may be provided with a groove. For example, the groove portion may be provided in a spiral shape, and the conducting wire 25 may be wound along the spiral groove portion.

(3-3. Third Modification)
In the embodiment described above, the recess 223 has a semi-elliptical shape in plan view from the axial direction. FIG. 11 is a schematic plan view showing a third modification of the configuration around the pin 214. FIG. 11 shows the state after the pin 214 has been heat staked. As shown in FIG. 11, the recess 223 may have a bowl shape in a plan view from the axial direction. According to this configuration, the end portion 251 of the conducting wire can be pulled out to the upper side of the substrate 22 while the conducting wire 25 is hooked on the recess 223. For this reason, workability | operativity of the connection operation | work to the land 222 of the conducting wire 25 can be improved.

  In the present embodiment, the bowl-shaped recess 223 includes a trapezoidal first portion 223a that is recessed in the circumferential direction from the inner surface of the hole 221 and a rectangular shape that extends radially inward from the first portion 223a in plan view from the axial direction. A second portion 223b having a shape. The recessed part 223 has the corner | angular part 223c which protrudes toward inner side, and the conducting wire 25 can be hooked on the corner | angular part 223c.

(3-4. Fourth Modification)
In the embodiment described above, the motor 1 is configured to have the resin portion 23 that covers the stator 21 and the substrate 22 and functions as a case. The resin portion 23 is configured to cover not only the stator 21 and the substrate 22 but also the pins 214. FIG. 12 is a schematic cross-sectional view showing a configuration of a fourth modification of the motor 1 of the present embodiment. In the motor 1 of the fourth modified example, the substrate 22 and at least the upper part of the pin 214 provided on the insulator 213 are not covered with resin. The present invention can also be applied to the motor 1 having such a configuration.

  The motor 1 of this modification has a resin casing 27 that houses the rotor 12 and the stator 21. The casing 27 is a bottomed cylindrical resin molded product that opens upward. The upper part of the pin 214 protrudes from the casing 27. The central opening 27 a of the casing 27 is an insertion port for the rotor 12. The substrate 22 is disposed in the upper part of the internal space of the casing 27. The substrate 22 is disposed on the upper side of the rotor 12 and has a through hole 22a through which the upper portion of the rotor 12 and the shaft 11 pass. The pin 214 is passed through a hole 221 provided in the substrate 22 and protrudes above the substrate 22. The motor 1 has a bracket 28 that faces the substrate 22 in the axial direction. The bracket 28 is a metal lid disposed on the upper side of the casing 27. The bracket 28 is fixed to the casing 27 by press-fitting, for example. The bracket 28 covers the substrate 22 and can prevent water or dust from adhering to the substrate 22.

  FIG. 13 is a schematic cross-sectional view showing the configuration around the pin 214 of the fourth modified example. The pin 214 has a protruding portion 2142 protruding from the upper side of the substrate 22. The protruding portion 2142 has an overhang portion 2142 a, and the end portion 251 of the conductive wire is sandwiched between the overhang portion 2142 a and the substrate 22. The end portion 251 of the conducting wire is electrically connected to the land 222 through the conducting member 26.

  An electronic component 29 is disposed on one side of the substrate 22 in the axial direction. Specifically, an electronic component 29 is disposed on the upper surface of the substrate 22. The height of the electronic component 29 in the axial direction is higher than the height of the protruding portion 2142. The bracket 28 and the electronic component 29 are in contact with each other on opposite surfaces. According to this configuration, since the bracket 28 and the electronic component 29 are in contact, heat generated from the electronic component 29 can be radiated to the outside of the motor 1. Since the electronic component 29 is higher in height in the axial direction than the pin 214, the bracket 28 and the electronic component 29 come into contact with each other without performing a process such as providing a protruding portion protruding downward on the bracket 28. be able to.

  The bracket 28 and the electronic component 29 may be in direct contact with each other, but may be in indirect contact with a member such as silicon interposed therebetween. When the bracket 28 and the electronic component 29 are in direct contact with each other, it is preferable that a heat transfer member such as silicon is attached to one of the bracket 28 and the electronic component 29 so as to contact both. The electronic component 29 may be a control IC that controls the motor 1.

(3-5. Points to note)
The configurations of the embodiment and the modification described above are merely examples of the present invention. The configuration of the embodiment and the modification may be changed as appropriate without departing from the technical idea of the present invention. In addition, the above-described embodiment and a plurality of modification examples may be combined and implemented within a possible range.

  The present invention can be widely applied to, for example, a motor having a structure in which a conductive wire drawn from a coil is connected to a land of a substrate.

DESCRIPTION OF SYMBOLS 1 ... Motor 10 ... Rotating part 20 ... Static part 22 ... Board | substrate 23 ... Resin part 25 ... Conductive wire 25a ... Core wire 25b ... Insulating member 28 ... Bracket 29 ... Electronic components 211 ... Stator core 212 ... Coil 213 ... Insulator 214 ... Pin 221 ... Hole 221a ... Opening 222 ... Land 223 ... Recess 251 ... Conductor end 2141 ... groove 2142 ... projection 2142a ... overhang 2143 ... top A ... center axis

Claims (15)

A motor,
A rotating part that rotates about a central axis;
A stationary part that faces the rotating part in a radial direction and supports the rotating part rotatably;
Have
The stationary part is
Coils,
An axially extending pin;
A substrate having a land on one end side in the axial direction, electrically connected to a conductive wire drawn out from the coil;
Have
The substrate extends in the axial direction and has a hole through which the conductive wire and the pin are passed,
The pin has a protruding portion protruding from one end side in the axial direction of the substrate,
The conducting wire has an end portion which is drawn out to one end side in the axial direction of the substrate,
The projecting portion has an overhanging portion that overlaps at least a part of the periphery of the hole portion of the substrate in a plan view from the axial direction,
The end portion is a motor sandwiched between the projecting portion and the substrate.   The motor according to claim 1, wherein the projecting portion includes a top surface located on one axial side of the pin.   The motor according to claim 1, wherein the protruding portion is wider in a direction orthogonal to the axial direction than a portion passing through the hole portion of the pin.   The motor according to any one of claims 1 to 3, wherein the pin is made of resin. The stationary part is
A stator core;
An insulator covering at least a part of the stator core;
Further comprising
The motor according to claim 1, wherein the pin and the insulator are a single member.   The motor according to any one of claims 1 to 5, wherein the pin has a groove extending in a direction including an axial component. The groove is a linear groove extending in the axial direction,
The motor according to claim 6, wherein the pin has the linear groove on at least one of a radially inner side and an outer side. The substrate has a recess recessed in the direction orthogonal to the axial direction on the inner surface of the hole,
The motor according to any one of claims 1 to 7, wherein the recess extends from an end surface on one axial side of the substrate to an end surface on the other axial side. The land is provided on at least a part of the periphery of the hole;
The motor according to claim 8, wherein at least a part of the land is opposed to the concave portion in the radial direction in a plan view from the axial direction.   The motor according to claim 8 or 9, wherein the concave portion has a bowl shape in a plan view from the axial direction.   The motor according to any one of claims 1 to 10, wherein the hole has a notch shape in which an opening is provided in a part of the periphery.   The motor according to any one of claims 1 to 11, wherein a part of the conducting wire is wound around the pin. The conducting wire is
Core wire,
An insulating member covering the core wire;
Have
The motor according to any one of claims 1 to 12, wherein the core wire is an aluminum wire.   The motor according to any one of claims 1 to 13, wherein the stationary portion further includes a resin portion that covers the substrate. A bracket further facing the substrate in the axial direction;
The height in the axial direction of the electronic component arranged on one end side in the axial direction of the substrate is higher than the height in the axial direction of the protruding portion,
The motor according to any one of claims 1 to 13, wherein the bracket and the electronic component are in contact with each other on opposite surfaces.