JP2019062583A - Stator unit, motor, and manufacturing method of stator unit - Google Patents

Abstract

To provide a stator unit capable of reducing the axial height.SOLUTION: A stator unit 2 has a stator 21 and a wiring board 22. The stator includes an annular stator core centered on the central axis, an insulator 212 disposed in the stator core, and a plurality of coils 213 circumferentially spaced from the stator core via an insulator. The wiring board includes a lead wire 221 disposed axially above the stator and wired to the wiring board and an L-shaped terminal 222 provided at one end of the lead wire and extending along the extending direction of the lead wire while bending downward in the axial direction. Furthermore, the stator includes a housing portion in which the lead wire 213a of the coil is disposed and that houses the terminal, and the terminal includes a connection portion connected to the lead wire.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a stator unit, a motor, and a method of manufacturing the stator unit.

  Conventionally, a motor is widely known in which a rotor having a magnet and a shaft is disposed radially outward or radially inward of an annular stator having an excitation coil. And the wiring stand which wired the lead wire for supplying electric power to the coil of a stator may be arrange | positioned at the one end side of the axial direction of a stator, and a stator unit may be comprised. A prior art related to a stator unit is disclosed in Patent Document 1.

  The conventional motor described in Patent Document 1 has a terminal board (wiring base) disposed on the upper surface of the stator core and having a lead wire. The terminal board has a plurality of lead wire side connection members electrically connected to lead wires. The plurality of lead wire side connection members are respectively arranged in accordance with the positions of the plurality of stator side connection members to which the winding ends of the stator iron core are electrically connected. The lead wire side connection member has a connection portion connected to the lead wire and a convex portion inserted into the stator side connection member. When the terminal plate is disposed on the upper surface of the stator core and the lead wire side connection member is inserted into the stator side connection member, the lead wire and the winding terminal can be electrically connected simultaneously at a plurality of locations.

JP, 2001-197699, A

  However, the lead wire side connection member of the conventional motor described in Patent Document 1 extends in the axial direction of the stator from the connection portion connected to the lead wire to the convex portion inserted into the stator side connection member. It has a linearly extending shape. As a result, there is a problem in that the axial height of the motor is increased. In order to miniaturize the motor, the structure is not preferable.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a stator unit capable of reducing the axial height of the stator unit, a motor, and a method of manufacturing the stator unit.

  An exemplary stator unit of the present invention is a stator unit having a stator and a wiring board, wherein the stator has an annular stator core centered on a central axis, an insulator disposed on the stator core, and the stator core. A plurality of coils spaced apart in the circumferential direction via the insulator, and the wiring board is arranged above the stator in the axial direction, and the lead wires are wired to the wiring board And an L-shaped terminal provided at one end of the lead wire and extending along the extending direction of the lead wire and bending downward in the axial direction, and in the stator, the conductive wire of the coil is It has an accommodating part arranged and accommodates the said terminal, and the said terminal has a connection part connected with the said conducting wire.

  An exemplary motor according to the present invention has a stator unit configured as described above, and a rotor disposed radially outward of the stator and rotating about a central axis extending in the vertical direction.

  An exemplary method of manufacturing a stator unit according to the present invention is a method of manufacturing a stator unit of an outer rotor type motor, comprising the steps of: winding a conductive wire around teeth of a stator to form a coil; and forming the coil A step of passing the lead wire into the inside of the housing portion located on the outer peripheral portion of the stator in the radial direction and winding and holding the hook provided on the radial outer side of the housing portion; A step of electrically connecting the lead wire by accommodating a terminal extending along the extending direction of the lead wire and bent in an L-shape into the inside of the accommodating portion, and cutting the hook And D. the step of making the outer peripheral surface in the radial direction of the housing portion flush.

  According to the exemplary stator unit, motor and stator unit manufacturing method of the present invention, it is possible to lower the axial height of the stator unit.

FIG. 1 is a longitudinal sectional view of a motor according to an embodiment of the present invention. FIG. 2 is a perspective view of a stator unit according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of the stator unit according to the embodiment of the present invention. FIG. 4 is a partial perspective view of a part of the wiring base of the stator unit as viewed from below. FIG. 5 is a partial perspective view seen from below the location of the terminals of the wiring board. FIG. 6 is a perspective view of the terminal. FIG. 7 is a perspective view of the terminal holder of the wiring board as viewed from below. FIG. 8 is a perspective view of the terminal holder of the wiring board as viewed from above. FIG. 9 is a partial perspective view from above of a portion of the stator. FIG. 10 is a perspective view of the housing portion of the stator as viewed from above. FIG. 11 is a partial side view showing a part of the stator.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this document, the direction in which the rotational axis of the motor extends is simply referred to as “axial direction”, and the direction orthogonal to the rotational axis (direction perpendicular to the axial direction) about the rotational axis of the motor is simply referred to as “radial direction”. The direction along the arc centering on the rotation axis of is simply referred to as "circumferential direction". The central axis of the stator and the central axis of the stator unit coincide with the rotational axis of the motor. That is, also for the stator and the stator unit, the directions coinciding with the axial direction, radial direction and circumferential direction of the motor in a state of being incorporated in the motor will be simply referred to as “axial direction”, “radial direction” and “circumferential direction”.

  Further, for convenience of explanation, the shape and positional relationship of each part will be described with the axial direction as the vertical direction and the vertical direction of FIG. 1 as the stator, the stator unit, and the vertical direction of the motor. Note that the definition in the vertical direction does not limit the direction of use of the motor. Further, in this document, a cross-sectional view parallel to the axial direction is referred to as a "longitudinal cross-sectional view". Also, as used herein, "parallel" and "perpendicular" do not mean strictly parallel and perpendicular, but include approximately parallel and approximately perpendicular.

<1. Schematic configuration of motor>
A schematic configuration of a motor according to an exemplary embodiment of the present invention will be described. FIG. 1 is a longitudinal sectional view of a motor 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the stator unit 2 according to the embodiment of the present invention. FIG. 3 is an exploded perspective view of the stator unit 2 according to the embodiment of the present invention. As shown in FIGS. 1, 2 and 3, the motor 1 has a stator unit 2 and a rotating portion 3. The motor 1 is an outer rotor type motor.

  The stator unit 2 has a stator 21 and a wiring board 22.

  The stator 21 has an annular shape centered on the central axis Ca. The stator 21 is an armature of the motor 1. The stator 21 has a stator core 211, an insulator 212, and a coil 213.

  The stator core 211 has an annular shape centered on the central axis Ca. The stator core 211 is formed by laminating a plurality of magnetic steel plates in the axial direction. The stator core 211 has a core back 211 a and a plurality of teeth 211 b. The core back 211a has an annular shape centered on the central axis Ca. The plurality of teeth 211 b extend radially outward from the outer circumferential surface of the core back 211 a in the radial direction. The plurality of teeth 211 b are arranged at intervals in the circumferential direction.

  The insulator 212 is disposed on the stator core 211. The insulator 212 is provided to surround the outer surface of the tooth 211 b. The insulator 212 is disposed between the stator core 211 and the coil 213. The insulator 212 is made of, for example, an insulating member such as a synthetic resin.

  Further, the stator 21 has a housing portion 212a. The housing portion 212 a is provided on the upper portion of the outer peripheral portion of the insulator 212 in the radial direction. The housing portion 212a is disposed with the lead wire 213a of the coil 213, and accommodates a terminal 222 described later.

  Coils 213 are circumferentially spaced from stator core 211 via insulators 212. The coil 213 is formed by winding the conducting wire 213a around the outer circumference of the tooth 211b via the insulator 212.

  The wiring base 22 is disposed above the stator 21 in the axial direction. The wiring base 22 has an annular shape centered on the central axis Ca and a plate shape. The wiring base 22 has a lead wire 221 and a terminal 222.

  The lead wires 221 are wired to the wiring stand 22. The lead wire 221 is wired on the lower surface side of the wiring stand 22. A terminal 222 is provided at one end of the lead wire 221. The other end side of the lead wire 221 extends toward the outside of the stator 21 and is electrically connected to a power supply source or the like.

  The terminal 222 is provided at one end of the lead wire 221. The terminals 222 are disposed on the outer periphery of the wiring base 22 in the radial direction. The terminal 222 is accommodated in the accommodation portion 212 a of the stator 21 when the wiring board 22 is attached to the stator 21, and is electrically connected to the conducting wire 213 a of the coil 213.

  Furthermore, the wiring base 22 has a rib portion 223. The rib 223 is provided in the same number as the coil 213. The plurality of rib portions 223 are arranged at intervals in the circumferential direction. The rib portion 223 protrudes downward in the axial direction from the lower surface of the wiring base 22 in the axial direction. The rib portion 223 has a plate shape extending in the axial direction and the radial direction. The rib portion 223 is inserted into the gap between the two coils 213 adjacent in the circumferential direction when the wiring base 22 is attached to the stator 21.

  The rotating unit 3 rotates around the central axis Ca. The rotating unit 3 has a shaft 31 and a rotor 32.

  The shaft 31 extends in the axial direction up and down along the central axis Ca. The shaft 31 is a rotating shaft of the motor 1. The shaft 31 is in the shape of a column or a pipe formed of, for example, a metal such as stainless steel. The shaft 31 is rotatably supported by being inserted into bearings 4 respectively provided on the upper and lower sides in the radial direction of the core back 211 a. The rotating unit 3 rotates around a shaft 31 extending in the vertical direction.

  The rotor 32 is disposed radially outward of the stator 21 and rotates about a central axis Ca extending in the vertical direction. The rotor 32 has a magnet holder 321 and a magnet 322.

  The magnet holder 321 is in the form of a cup whose one end in the axial direction is open. The magnet holder 321 is placed on the stator unit 2 from the opening side. The magnet holder 321 has a hole 321 a at the center in the radial direction on the other end side in the axial direction. The hole 321a penetrates the magnet holder 321 in the axial direction. The shaft 31 is, for example, press-fit into the hole 321 a and fixed to the magnet holder 321. When the motor 1 is driven, the magnet holder 321 rotates with the shaft 31.

  The magnet 322 is fixed to the inner circumferential surface of the magnet holder 321. The magnets 322 are arranged radially outside the stator 21 at predetermined intervals. The magnet 322 is, for example, a single permanent magnet. An N pole and an S pole are alternately magnetized in the circumferential direction on the radially inner surface of the magnet 322. Instead of a single magnet, a plurality of magnets in which either the N pole or the S pole is magnetized may be used.

  In the motor 1, when power is supplied to the coil 213 through the lead wire 221, a magnetic flux in the radial direction is generated in the teeth 211 b. A magnetic field formed by the magnetic flux and a magnetic field formed by the magnet 322 act to generate torque in the circumferential direction of the rotor 32. By this torque, the rotary unit 3 rotates around the central axis Ca. When the power supply to the coil 213 is stopped, the rotation of the rotating unit 3 is stopped.

<2. Details of the stator unit>
<2-1. Wiring base details>
FIG. 4 is a partial perspective view of a part of the wiring stand 22 of the stator unit 2 as viewed from below. FIG. 5 is a partial perspective view of the location of the terminal 222 of the wiring base 22 as viewed from below. As shown in FIGS. 4 and 5, the wiring board 22 has a coil hole 224, a lead hole 225, and a terminal holding portion 226 in addition to the above-described lead wire 221, the terminal 222 and the rib portion 223.

  The coil holes 224 are arranged at intervals in the circumferential direction according to the positions of the plurality of coils 213. The coil hole 224 has a rectangular shape, similar to the shape of the coil 213 viewed from above along the axial direction. The coil hole 224 penetrates the wiring base 22 up and down in the axial direction. A part of the upper side of the coil 213 is inserted into the coil hole 224.

  The lead holes 225 are provided on the outer circumferential portion of the wiring table 22 in the radial direction. The lead-out holes 225 penetrate the wiring base 22 up and down in the axial direction. Lead wires 221 wired on the lower surface side of the wiring board 22 are inserted into the lead holes 225 upward in the axial direction. The lead wires 221 extend toward the outside of the stator 21 through the lead holes 225.

  The terminal holding portion 226 is provided at the outer edge of the wiring table 22 in the radial direction. The terminal holding portion 226 is disposed radially outward of the coil hole 224. The terminal holder 226 holds the terminal 222. The terminal 222 held by the terminal holding portion 226 and the end of the lead wire 221 are held so as to extend along the circumferential direction of the wiring board 22. The details of the terminal holder 226 will be described later.

2-2. Terminal Details>
FIG. 6 is a perspective view of the terminal 222. FIG. As shown in FIGS. 5 and 6, the terminal 222 has an L shape extending along the extension direction of the lead wire 221 and bending downward in the axial direction. Since the terminal 222 of the lead wire 221 is L-shaped, the axial height of the stator unit 2 can be reduced. Furthermore, the height in the axial direction of the motor 1 can be reduced.

  The terminal 222 includes a connection portion 222a, a lead wire holding portion 222b, and a base portion 222c.

  The connection portion 222 a is disposed on the tip end side of the lead wire 221 in the extending direction. The connection portion 222 a is connected to the conducting wire 213 a of the coil 213. The connecting portion 222a is bent downward in the axial direction with respect to the base portion 222c at a bending portion 222d provided on the side of the base portion 222c. The connection portion 222a is entirely plate-shaped, and includes a flat portion 222e, a U-shaped portion 222f, and a groove 222g.

  The flat portions 222 e are provided at two places. The two flat portions 222 e are connected by the U-shaped portion 222 f and are parallel to each other with a space in the extending direction of the lead wire 221. The flat portion 222 e extends in the direction intersecting with the extending direction of the lead wire 221 (the radial direction of the wiring stand 22) and in the axial direction. The U-shaped portion 222 f is located at the lower end in the axial direction of the connection portion 222 a. The groove 222g is recessed upward in a predetermined length in the U-shaped portion 222f and the flat portion 222e from the lower end in the axial direction of the connection portion 222a. In the two flat portions 222 e, the groove portions 222 g are arranged along the extending direction of the lead wire 221. When the wiring board 22 is attached to the stator 21, the groove portion 222g is electrically connected by inserting the conducting wire 213a of the coil 213. Thus, the connection portion 222 a is connected to the conducting wire 213 a of the coil 213.

  The lead wire holding portion 222 b is disposed on one end side of the terminal 222 opposite to the connection portion 222 a. The lead wire holding portion 222 b has an annular shape and covers the outer periphery of the lead wire 221. The lead wire holding portion 222 b holds the lead wire 221. More specifically, the lead wire holding part 222b crimps and holds the covering part 221a of the conducting wire (not shown) in the lead wire 221.

  The base 222 c is disposed between the connection portion 222 a and the lead wire holding portion 222 b. The base 222 c connects the connection portion 222 a and the lead wire holding portion 222 b. Furthermore, the base 222 c crimps and holds the lead wire in the lead wire 221.

<2-3. Details of terminal holder>
FIG. 7 is a perspective view of the terminal holding portion 226 of the wiring base 22 as viewed from below. FIG. 8 is a perspective view of the terminal holding portion 226 of the wiring base 22 as viewed from above. FIG. 7 shows only the terminal holding portion 226. On the other hand, FIG. 8 shows the terminal holding portion 226 in a state where the wiring board 22 to which the lead wires 221 are wired is attached to the stator 21.

  As shown in FIGS. 5, 7 and 8, the wiring board 22 has a guide portion 226a, a recess 226b, a base holding portion 226c, and a through hole 226d. More specifically, in the present embodiment, the wiring board 22 has the terminal holding portion 226, and the terminal holding portion 226 includes the guide portion 226a, the concave portion 226b, the base holding portion 226c, and the through hole 226d. Have. The terminal holder 226 holds the terminal 222.

  The guide portion 226 a is disposed on one end side of the terminal holding portion 226 in the circumferential direction. The guide part 226a is provided in three places. The three guide portions 226a are disposed on both outer sides in the circumferential direction with respect to the connection portion 222a of the terminal 222 held by the terminal holding portion 226. One of the guide portions 226a is disposed on the leading end side in the extension direction of the lead wire 221 with respect to the connection portion 222a, and contacts the flat portion 222e of the connection portion 222a from the outer side in the circumferential direction. The remaining two guide portions 226a are disposed radially outward and radially inward of the bent portion 222d of the terminal 222, and sandwich the bent portion 222d between each other and from the lead wire 221 side to the flat portion 222e of the connecting portion 222a. Contact.

  According to the above configuration, the guide portion 226a is held with the connection portion 222a facing downward in the axial direction. That is, the connection portion 222 a of the terminal 222 can be directed in the direction of the conducting wire 213 a of the coil 213. Therefore, when the wiring base 22 is attached to the stator 21, it is possible to easily connect the terminal 222 and the conducting wire 213a of the coil 213.

  The recess 226 b is disposed on one end side of the terminal holding portion 226 in the circumferential direction opposite to the guide portion 226 a. The recess 226 b is disposed at the position of the lead wire holding portion 222 b and axially recessed. The recess 226 b is recessed upward from the lower surface of the wiring table 22 at the outer peripheral edge of the wiring table 22 in the radial direction. At least a portion of the lead wire holding portion 222b is accommodated in the recess 226b. The recess 226 b accommodates a portion of the upper side in the axial direction of the lead wire holding portion 222 b. Thus, a part of the lead wire holding portion 222b larger than the diameter of the lead wire 221 can be accommodated in the recess 226b. Therefore, it is possible to lower the axial height of the stator unit 2.

  The base holding portion 226c is disposed between the guide portion 226a and the recess 226b. The base holding portion 226 c is disposed axially below the base 222 c of the terminal 222 held by the terminal holding portion 226. The base holding portion 226c is a convex portion that protrudes toward the base 222c from the inner side in the radial direction to the outer side in the radial direction. The base holding portion 226c holds the base 222c. Thereby, it is possible to prevent the lead wire 221 from hanging down in the axial direction.

  The through hole 226 d is disposed adjacent to the guide portion 226 a. The through hole 226 d penetrates the wiring stand 22 in the axial direction at the position of the terminal 222. The through hole 226 d is, for example, L-shaped as viewed from the axial direction. The through hole 226 d has a terminal adjacent portion 226 e and a stator adjacent portion 226 f.

  In a state where the wiring base 22 to which the lead wires 221 are wired is attached to the stator 21, the terminal adjacent portion 226 e is adjacent to the terminal 222 in the axial direction. In a state where the wiring base 22 to which the lead wires 221 are wired is attached to the stator 21, the stator adjacent portion 226 f is adjacent to the stator 21 in the axial direction. Accordingly, when the wiring board 22 is attached to the stator 21, the terminal 222 can be pressed toward the conductor 213 a of the coil 213 by passing the jig through the through hole 226 d in the axial direction. At this time, the jig pushes the terminal 222 through the terminal adjacent portion 226e of the through hole 226d. Furthermore, since the jig contacts the stator 21 through the stator adjacent portion 226f of the through hole 226d and stops, the terminal 222 can be disposed at a predetermined position with respect to the lead 213a of the coil 213. That is, it is possible to prevent the terminal 222 from being pressed against the conducting wire 213 a of the coil 213 more than necessary.

<2-4. Details of the storage section>
FIG. 9 is a partial perspective view of a part of the stator 21 as viewed from above. FIG. 10 is a perspective view of the housing portion 212 a of the stator 21 as viewed from above. FIG. 11 is a partial side view showing a part of the stator 21. As shown in FIG. As shown in FIG. 9, in the motor 1 of the outer rotor type, the housing portion 212 a is located at the outer peripheral portion of the teeth 211 b of the stator 21 in the radial direction.

  For example, in the case of a compressor motor, a cylinder block for disposing a compression mechanism may have a shape that bulges downward in the vicinity of the central axis of the stator. Therefore, by providing the housing portion 212 a of the terminal 222 on the outer peripheral portion in the radial direction of the stator 21, the axial height of the motor 1 can be reduced so as not to overlap with the cylinder block.

  Further, as shown in FIG. 9, one end side of the lead wire 221 provided with the terminal 222 is accommodated in the accommodation portion 212 a. The lead wire 221 is arranged between the housing portion 212a for housing the terminal 222 and the coil 213 adjacent in the circumferential direction, the core back 211a, the coil 213 adjacent in the circumferential direction, and the outer peripheral portion of the teeth 211b in the radial direction. The wires are extended toward the outside of the stator 21.

  According to this configuration, when there are a plurality of lead wires 221, the plurality of lead wires 221 are collectively gathered at the radial outer peripheral portion of the teeth 211b by temporarily turning from the accommodation portion 212a to the core back 211a side. It can be extended towards the outside. Therefore, the lead wire 221 can be prevented from straddling above the coil 213, and the axial height of the stator unit 2 can be reduced.

  As shown in FIGS. 9 and 10, the accommodation portion 212a is located at the upper portion of the outer peripheral portion of the teeth 211b in the radial direction. The housing portion 212a has a terminal insertion portion 212b. The terminal insertion portion 212b is disposed at the circumferential center of the accommodation portion 212a. The terminal insertion portion 212 b has a concave shape which is recessed downward in the axial direction. In the terminal insertion portion 212 b, when the wiring board 22 is attached to the stator 21, the connection portion 222 a of the terminal 222 is inserted.

  The insulator 212 has an axially extending wall 212 c. The wall 212 c has a first wall 212 d and a second wall 212 e.

  The first wall 212 d is located closer to the coil 213 than the position of the housing 212 a. The second wall 212 e is located farther from the coil 213 than the position of the housing 212 a. The first wall 212 d and the second wall 212 e extend along the circumferential direction of the stator 21. The terminal 222 is accommodated in the accommodation portion 212a below the upper end in the axial direction of the wall portion 212c. Thus, the terminals 222 can be prevented from projecting upward beyond the wall 212 c of the insulator 212, and the axial height of the stator unit 2 can be reduced.

  Also, the first wall 212 d has a first slit 212 f. The first slits 212f are disposed at positions different from the terminal insertion portion 212b in the circumferential direction. The first slit 212 f is in the form of a groove extending from the upper end to the lower end of the first wall 212 d. The first slit 212 f penetrates the first wall 212 d in the radial direction. The lead 213a of the coil 213 is inserted into the first slit 212f. Thereby, the conducting wire 213a of the coil 213 can be easily extended to the position of the terminal insertion portion 212b.

  The first slits 212f may be provided also in the second wall 212e by arranging the first slits 212f along the radial direction with the space of the housing 212a separated. Thus, when the conducting wire 213a is wound around the teeth 211b, the first slit 212f of the first wall 212d and the first slit 212f of the second wall 212e are extended before the conducting wire 213a is extended to the position of the terminal insertion portion 212b. It is possible to temporarily hold it in a straddle state. Thereby, it is possible to improve the workability when winding the conducting wire 213a around the teeth 211b.

  The second wall 212 e also has a second slit 212 g. The second slits 212 g are disposed at positions different from the terminal insertion portion 212 b in the circumferential direction. The second slit 212g is located farther from the first slit 212f than the position of the terminal insertion portion 212b. The second slit 212g is in the form of a groove extending from the upper end to the lower end of the second wall 212e. The second slit 212g penetrates the second wall 212e along the radial direction. The lead 213a of the coil 213 is inserted into the second slit 212g. Thus, when the conducting wire 213a is wound around the tooth 211b, the conducting wire 213a can be temporarily held by the second slit 212g after being extended to the position of the terminal insertion portion 212b. Thereby, it is possible to improve the workability when winding the conducting wire 213a around the teeth 211b.

  The insulator 212 also has a hook 212 h. The hooks 212 h are provided radially outward of the housing portion 212 a. The hooks 212 h are L-shaped extending outward in the radial direction from the outer peripheral surface of the second wall 212 e and bent upward in the axial direction.

  In the method of manufacturing the stator unit 2 of the motor 1 of the outer rotor type, first, the step of forming the coil 213 by winding the conductive wire 213a around the teeth 211b of the stator 21 is performed. A step of passing the conductive wire 213a through the inside of the housing portion 212a located on the outer peripheral portion of the stator 21 in the radial direction after winding the coil 213 and winding and holding it around the hook 212h provided radially outside the housing portion 212a Will be implemented. At this time, the conducting wire 213a drawn from the coil 213 is wired in the order of the first slit 212f, the terminal insertion portion 212b, and the second slit 212g, and reaches the position of the hook 212h. Next, a terminal 222 which is provided at one end of the lead wire 221 and extends along the extension direction of the lead wire 221 and is bent in an L shape is accommodated in the inside of the housing portion 212a, thereby electrically connecting the lead wire 213a. A connecting step is performed. Next, a step of cutting the hooks 212 h to make the outer peripheral surface in the radial direction of the housing portion 212 a flush is performed. According to this method, it is possible to manufacture the stator unit 2 whose axial height is low.

  In the present embodiment, the hook 212 h is cut in the final process of manufacturing the above-mentioned stator unit 2, but for convenience of explanation, in FIG. 2, FIG. 3, FIG. 9, FIG. The hook 212 h is shown to remain. As described above, in the embodiment in which the stator unit 2 is completed, the hooks 212 h are cut, and the outer peripheral surface in the radial direction of the accommodation portion 212 a, that is, the outer peripheral surface in the radial direction of the stator 21 becomes flush.

  The motor 1 includes the stator 2 shown as the embodiment and the modification thereof, and a rotor 32 which is disposed radially outward of the stator 2 and rotates around a central axis Ca extending in the vertical direction. As a result, it is possible to lower the axial height of the motor 1.

<3. Other>
The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

  For example, in the above embodiment, the housing portion 212a of the terminal 222 is located at the outer peripheral portion in the radial direction of the tooth 211b, but the arrangement of the housing portion 212a is not limited to this configuration. For example, the accommodation portion 212a may be located on the inner circumferential portion of the teeth 211b in the radial direction. In the case where it is desired to lower the axial height particularly on the outer peripheral side in the radial direction of the stator unit 2, it is preferable to dispose the accommodating portion 212a in the inner peripheral portion in the radial direction of the teeth 211b.

  The present invention can be used, for example, in a stator unit and a motor. The structure according to the stator unit of the present invention is applicable to, for example, a compressor mounted on a refrigerator or the like.

DESCRIPTION OF SYMBOLS 1 ... motor, 2 ... stator unit, 3 ... rotation part, 4 ... bearing, 21 .. stator, 22 .. wiring base, 31 .. shaft, 32 .. rotor , 211: stator core, 211a: core back, 211b: teeth, 212: insulator, 212a: housing portion 212b: terminal insertion portion 212c: wall portion 212d. · · · 1st wall, 212e · · · 2nd wall, 212f · · · 1st slit, 212g · · · 2nd slit, 212h · · · · · · · · · · · · · · · · · · · 213a · · · lead wire, 221 ··· Lead wire, 221 a · · · Cover portion, 222 · · · · · · · · · · · · · · · · · · · · · connection portion, 222b · · · lead wire holding portion, 222c · · · · base, 222d · · · bent portion, 222e ... Plane part, 2 2f: U-shaped part, 222g: groove part, 223: rib part, 224: coil hole, 225: extraction hole, 226: terminal holding part, 226a: guide part 226b: recessed portion 226c: base holding portion 226d: through hole 226e: terminal adjacent portion 226f: stator adjacent portion 321: magnet holder 321a: hole Part, 322: Magnet, Ca: Central axis

Claims (12)

A stator unit having a stator and a wiring board, wherein
The stator is
An annular stator core centered on the central axis,
An insulator disposed on the stator core;
A plurality of coils spaced apart in the circumferential direction with respect to the stator core via the insulator;
Have
The wiring board is
It is disposed axially above the stator,
Lead wires wired to the wiring board;
An L-shaped terminal provided at one end of the lead wire and extending along the extending direction of the lead wire and bending downward in the axial direction;
Have
The stator has an accommodating portion in which the lead wire of the coil is disposed and which accommodates the terminal;
The stator unit having a connection portion connected to the lead wire. The stator unit according to claim 1, wherein the wiring board has a guide portion that holds the connection portion in the state of facing downward in the axial direction. The terminal is
A lead wire holding portion for holding the lead wire;
A base connecting the connection portion and the lead wire holding portion;
Have
The stator unit according to claim 1, wherein the wiring board has a base holding portion that holds the base. The terminal has a lead wire holding portion for holding the lead wire,
The wiring board is disposed at the position of the lead wire holding portion and has an axially recessed recess.
The stator unit according to any one of claims 1 to 3, wherein at least a part of the lead wire holding portion is accommodated in the recess. The wiring board has a through hole axially penetrating at the position of the terminal;
The through hole is
A terminal adjacent portion adjacent to the terminal in the axial direction;
A stator abutment adjacent to the stator in the axial direction,
The stator unit according to any one of claims 1 to 4, comprising: The insulator has an axially extending wall portion,
The stator unit according to any one of claims 1 to 5, wherein the terminal is accommodated in the accommodation portion below the upper end in the axial direction of the wall portion. The insulator has an axially extending wall portion,
The wall portion has a first wall portion located closer to the coil than a position of the housing portion,
The stator unit according to any one of claims 1 to 6, wherein the first wall portion has a first slit into which the conducting wire is inserted. The wall has a second wall located farther from the coil than the position of the housing.
The stator unit according to claim 7, wherein the second wall portion has a second slit into which the wire is inserted. The stator unit according to any one of claims 1 to 8.
A rotor disposed radially outward of the stator and rotating about a central axis extending in the vertical direction;
With a motor. It is an outer rotor type motor, and
The motor according to claim 9, wherein the housing portion is located at a radial outer peripheral portion of the stator. The stator core is
An annular core back centered on the central axis,
A plurality of teeth that extend radially outward from the outer peripheral portion in the radial direction of the core back and are spaced apart in the circumferential direction;
Have
The housing portion is located at a radial outer peripheral portion of the teeth,
The lead wire is wired in the order of the accommodation portion for accommodating the terminals, between the coils adjacent in the circumferential direction, the core back, between the coils adjacent in the circumferential direction, and the outer peripheral portion of the teeth in the radial direction. The motor according to claim 9, wherein the motor extends toward the outside of the stator. A method of manufacturing a stator unit of an outer rotor type motor,
Winding a conductive wire around stator teeth to form a coil;
After the coil is formed, passing the conductive wire through the inside of the housing portion located on the outer peripheral portion of the stator in the radial direction, and winding and holding the conductive wire around hooks provided radially outside the housing portion;
Electrically connecting the lead wire by accommodating a terminal provided at one end of the lead wire and extending along the extending direction of the lead wire and bending in an L-shape inside the housing portion;
Cutting the hook to make the radial outer peripheral surface of the housing portion flush;
A method of manufacturing a stator unit including:

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