WO2021214990A1

WO2021214990A1 - Electric motor and air conditioner

Info

Publication number: WO2021214990A1
Application number: PCT/JP2020/017736
Authority: WO
Inventors: 山本　峰雄; 石井　博幸; 隼一郎尾屋; 優人浦辺
Original assignee: 三菱電機株式会社
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-10-28

Abstract

This electric motor is provided with: a stator having a coil and a terminal to which an end portion of the coil is connected; a lead wire that has a core wire and a film having the core wire coated therewith, that has one end where a core wire exposure part having the core wire exposed therefrom is formed, and that has the core wire exposure part connected to the terminal; a lead wire wiring component that holds the lead wire and that is mounted to one end of the stator; and a mold part that covers the stator and the lead wire wiring component with resin. When the place where the core wire in the lead wire is coated with the film is defined as a coated part, the lead wire wiring component is formed from resin and is provided with a lead wire fixing part that holds an end portion of the coated part on the core wire exposure part side and an end portion of the core wire exposure part on the coated part side. The lead wire fixing part is provided with, at a boundary part between the coated part and the core wire exposure part, a first welded part obtained by melting resin which is a material of the lead wire fixing part and being firmly fixed to the boundary part.

Description

Motor and air conditioner

The present disclosure relates to an electric motor provided with a molded stator in which the outer peripheral portion of the stator is covered with resin, and an air conditioner provided with the electric motor.

Conventionally, an electric motor provided with a mold stator in which the outer peripheral portion of the stator is covered with a resin is known (see, for example, Patent Document 1). Such an electric motor includes a stator, a lead wire, a lead wire wiring component, and a mold portion. The stator comprises a coil and terminals to which the ends of the coil are connected. The lead wire includes a core wire and a coating film that covers the core wire. At one end of the lead wire, an exposed core wire portion is formed. Further, the exposed core wire portion of the lead wire is connected to the terminal of the stator. The lead wire wiring component holds the lead wire and is attached to one end of the stator. The mold portion is a portion where the stator and the lead wire wiring component are covered with resin.

The part of the lead wire where the core wire is covered with a coating is referred to as the covering part. In the motor provided with the mold stator, the boundary portion between the covering portion and the exposed core wire portion of the lead wire is arranged in the mold portion. Here, the mold portion is formed on the outer peripheral side of the stator by molding. Specifically, a stator, a lead wire wiring component, and a part of the lead wire including the exposed core wire side are arranged in the mold. In this state, the melted resin is poured into the mold, and a mold portion is formed on the outer peripheral side of the stator.

Japanese Unexamined Patent Publication No. 2010-273517

When forming the mold portion on the outer peripheral side of the stator by mold molding, the air in the mold is pushed by the resin poured into the mold and pushed out of the mold while being compressed. Here, in a conventional motor provided with a mold stator, a part of the air compressed by the resin poured into the mold is coated with the core wire from the boundary portion between the coated portion and the exposed core wire portion of the lead wire. There is a problem that the coating may be damaged due to inflow between the two.

This disclosure is made in order to solve the above-mentioned problems, and is an electric motor provided with a mold stator, which can suppress the inflow of air between the core wire of the lead wire and the coating film more than before. The first purpose is to obtain. A second object of the present disclosure is to obtain an air conditioner equipped with such an electric motor.

The electric motor according to the present disclosure has a coil and a stator having a terminal to which the end of the coil is connected, a core wire and a coating film covering the core wire, and a core wire exposed portion in which the core wire is exposed is formed at one end. , The lead wire whose core wire exposed portion is connected to the terminal, the lead wire wiring component which holds the lead wire and is attached to one end of the stator, and the stator and the lead wire wiring component are made of resin. When a molded portion for covering is provided and a portion of the lead wire whose core wire is covered with the coating is used as a covering portion, the lead wire wiring component is formed of resin and the core wire exposed portion side of the covering portion is provided. A lead wire fixing portion that holds the end portion of the core wire exposed portion and the end portion of the core wire exposed portion on the covering portion side is provided, and the lead wire fixing portion is provided at a boundary portion between the covering portion and the core wire exposed portion. It has a first welded portion in which the resin that is the material of the lead wire fixing portion is melted and fixed to the boundary portion.

Further, the air conditioner according to the present disclosure includes a blower, and the blower includes an electric motor according to the present disclosure and a fan driven by the electric motor.

In the motor according to the present disclosure, a first welding portion is provided at the boundary between the covering portion and the exposed core wire portion of the lead wire. Therefore, in the motor according to the present disclosure, the path through which air flows between the core wire of the lead wire and the coating film is blocked by the first welding portion as compared with the conventional case. Therefore, the motor according to the present disclosure can suppress the inflow of air between the core wire of the lead wire and the coating film as compared with the conventional case.

It is a figure which shows the electric motor which concerns on this Embodiment 1, and is the side view which made a part of the cross section. FIG. 5 is an exploded perspective view of a stator, a lead wire, and a lead wire wiring component in the motor according to the first embodiment. It is a perspective view of the stator, the lead wire and the lead wire wiring component in the motor which concerns on Embodiment 1. It is a figure which looked at the lead wire and the lead wire wiring component of the electric motor which concerns on Embodiment 1 from the stator side. It is a view of arrow A of FIG. It is a figure which looked at the lead wire and the lead wire wiring component of the electric motor which concerns on Embodiment 1 from the opposite side of a stator. It is a figure which looked at the lead wire fixing part of the motor which concerns on this Embodiment 1 from the opposite side of a stator. FIG. 7 is a cross-sectional view taken along the line BB of FIG. It is a figure which looked at the lead wire fixing part of the motor which concerns on this Embodiment 1 from the opposite side of a stator. FIG. 9 is a cross-sectional view taken along the line CC of FIG. It is a figure which shows the structure of the air conditioner which concerns on embodiment 2.

Embodiment 1.
FIG. 1 is a view showing an electric motor according to the first embodiment, and is a side view showing a part thereof in a cross section. The electric motor 1 includes a stator 20, a lead wire 60, a lead wire wiring component 31, and a rotor assembly 3. The stator 20 has a substantially cylindrical shape with a through hole formed in the center thereof. The stator 20 includes a coil 24 and a terminal 25 to which an end portion of the coil 24 is connected, which will be described later. Specifically, the magnet wire is wound around to form the coil 24. The end of the magnet wire is connected to the terminal 25 described later. A part of the lead wire 60 is held by the lead wire wiring component 31. Further, one end of the lead wire 60 is connected to a terminal 25 described later of the stator 20. The lead wire wiring component 31 is attached to one end of the stator 20. The details of the stator 20, the lead wire 60, and the lead wire wiring component 31 will be described later.

The rotor assembly 3 includes a rotor magnet 10 which is a cylindrical permanent magnet. The rotor assembly 3 is rotatably assembled on the inner peripheral side of the stator 20, and the rotor magnet 10 causes the rotating shaft 11 to be rotated by a magnetic field generated in the stator 20 by energizing the coil 24 of the stator 20. Rotate to the center.

The stator 20, a part of the lead wire 60, and the lead wire wiring component 31 are covered with a mold portion 8 made of resin. In other words, the motor 1 includes a stator 20, a part of the lead wire 60, and a mold portion 8 that covers the lead wire wiring component 31 with resin. The mold portion 8 is formed on the outer peripheral side of the stator 20 or the like by molding. The material used for the mold portion 8 is a thermosetting material such as BMC (Bulk Molding Compound). BMC is a material containing unsaturated polyester as a main component. Hereinafter, the assembly in which the stator 20, a part of the lead wire 60, and the lead wire wiring component 31 are covered with the mold portion 8 is referred to as a mold stator 2.

Then, the electric motor 1 is manufactured by combining the mold stator 2 and the rotor assembly 3 with the bracket 4.

Specifically, the rotor assembly 3 is obtained as follows. The rotor magnet 10 is integrated with the drive shaft 12 with a resin such as polybutylene terephthalate. Then, the rotor assembly 3 is obtained by inserting and assembling the bearing 6 and the bearing 7 that rotatably support the drive shaft 12 from both ends of the drive shaft 12. Further, the motor 1 is completed by attaching the bearing 7 of the rotor assembly 3 to the mold stator 2 and press-fitting the bracket 4 into the mold stator 2 while attaching the bracket 4 to the bearing 6.

Subsequently, the detailed configuration of the stator 20, the lead wire 60, and the lead wire wiring component 31 will be described.

FIG. 2 is an exploded perspective view of a stator, a lead wire, and a lead wire wiring component in the motor according to the first embodiment. FIG. 3 is a perspective view of a stator, a lead wire, and a lead wire wiring component in the motor according to the first embodiment. FIG. 4 is a view of the lead wire and the lead wire wiring component of the motor according to the first embodiment as viewed from the stator side. FIG. 5 is a view taken along the arrow A of FIG. Further, FIG. 6 is a view of the lead wire and the lead wire wiring component of the motor according to the first embodiment as viewed from the opposite side of the stator. As will be described later, in the first embodiment, the lead wire 60 is assembled to the lead wire wiring component 31 to manufacture the lead wire wiring component assembly 30, and the lead wire wiring component assembly 30 is attached to the stator 20. It is configured to be attached to one end. FIG. 2 shows a state before the lead wire wiring component assembly 30 is attached to one end of the stator 20. Further, FIG. 3 shows a state in which the lead wire wiring component assembly 30 is attached to one end of the stator 20. The white arrows shown in FIG. 2 indicate the mounting direction when the lead wire wiring component assembly 30 is mounted on one end of the stator 20.

The stator 20 includes a stator core 21, an insulating portion 22, a coil 24, and a terminal 25. Specifically, in the first embodiment, the stator 20 includes a plurality of insulating portions 22, a plurality of coils 24, and a plurality of terminals 25.

The stator core 21 is configured by laminating a plurality of electromagnetic steel sheets punched into a predetermined shape. The plurality of laminated electromagnetic steel sheets are fixed by caulking, welding, adhesion, or the like. An insulating portion 22 is provided for each of the plurality of teeth of the stator core 21. The insulating portion 22 is made of a thermoplastic resin such as polybutylene terephthalate. Further, at least a part of the insulating portion 22 is formed with a protrusion 23 protruding toward the lead wire wiring component 31 on one end side of the stator core 21. The insulating portion 22 is integrally formed with the stator core 21 by, for example, molding. The insulating portion 22 may be formed as a separate component from the stator core 21, and the insulating portion 22 may be attached to the stator core 21.

The coil 24 is configured by winding a magnet wire around the insulating portion 22. The terminal 25 is assembled to at least a part of the insulating portion 22. The ends of the magnet wires constituting the coil 24 are connected to each terminal 25.

The lead wire 60 supplies electric power to each coil 24. The electric motor 1 according to the first embodiment includes three lead wires 60. The lead wire 60 includes a core wire 61 and a coating film 62 that covers the core wire 61. Further, the lead wire 60 has a core wire exposed portion 63 having an exposed core wire 61 formed at one end thereof. Then, the core wire exposed portion 63 is connected to the terminal 25. In the core wire exposed portion 63, the exposed core wire 61 is twisted a plurality of times so that the core wire 61 does not come apart. In the following, the portion of the lead wire 60 in which the core wire 61 is covered with the coating film 62 will be referred to as a covering portion 64.

The lead wire wiring component 31 is made of a thermoplastic resin such as polybutylene terephthalate. The lead wire wiring component 31 includes a lead wire fixing portion 40. That is, the lead wire fixing portion 40 is made of resin. Further, the lead wire wiring component 31 according to the first embodiment includes a core wire fixing portion 50. That is, the core wire fixing portion 50 is made of resin. Further, in the first embodiment, the lead wire wiring component 31 includes a wiring portion 32, and the lead wire fixing portion 40 and the core wire fixing portion 50 are provided in the wiring portion 32. Further, in the first embodiment, the lead wire wiring component 31 includes a mouth-out portion 33 provided in the wiring portion 32.

The wiring portion 32 is a plate-shaped portion formed in a substantially annular shape. A plurality of mounting legs 34 protruding outward in the radial direction of the wiring portion 32 are provided on the outer peripheral portion of the wiring portion 32. Further, each mounting foot 34 is formed with a hole 35 into which the protrusion 23 is inserted at a position facing the protrusion 23 formed in the insulating portion 22 of the stator 20. With the protrusion 23 inserted into the hole 35, the lead wire wiring component 31 is attached to one end of the stator 20 by melting the tip of the protrusion 23 and forming a flange at the tip of the protrusion 23. The tip of the protrusion 23 is melted, for example, by applying heat or ultrasonic waves to the tip. In the following, the surface of the wiring portion 32 facing the stator 20 will be referred to as the stator facing surface 32a. Further, the surface of the wiring portion 32 opposite to the stator facing surface 32a is referred to as an anti-stator facing surface 32b.

In the wiring unit 32, the above-mentioned three lead wires 60 for supplying power are routed. In the first embodiment, the wiring portion 32 is provided with a substantially cylindrical inner wall 37 projecting toward the stator 20 on the stator facing surface 32a. Then, the above-mentioned three lead wires 60 are routed around the wiring portion 32 so as to be wound around the outer peripheral surface of the inner wall 37. A lead wire other than the lead wire 60 described above may be routed to the wiring portion 32.

The mouth-out portion 33 is provided so as to protrude outward in the radial direction of the wiring portion 32 from the outer peripheral portion of the wiring portion 32. The lead wire 33 sandwiches the lead wire 60 routed to the wiring section 32 together with the holding component 38 attached to the lead wire 33, and holds the intermediate portion of the lead wire 60. The portion of the lead wire 60 that is arranged on the wiring portion 32 side with respect to the outlet portion 33 is a portion that is covered by the mold portion 8. Further, the portion of the lead wire 60 that is arranged on the side opposite to the wiring portion 32 with respect to the outlet portion 33 is a portion that is exposed from the mold portion 8.

FIG. 7 is a view of the lead wire fixing portion of the motor according to the first embodiment as viewed from the opposite side of the stator. FIG. 8 is a cross-sectional view taken along the line BB of FIG. FIG. 9 is a view of the lead wire fixing portion of the motor according to the first embodiment as viewed from the opposite side of the stator. FIG. 10 is a cross-sectional view taken along the line CC of FIG. Here, as will be described later, the lead wire fixing portion 40 according to the first embodiment includes a first welding portion 41. 7 and 8 show the lead wire fixing portion 40 before the first welding portion 41 is formed. Further, FIGS. 9 and 10 show the lead wire fixing portion 40 after the first welding portion 41 is formed. Note that FIG. 6 above shows the lead wire fixing portion 40 before the first welding portion 41 is formed.
Hereinafter, the detailed configuration of the lead wire fixing portion 40 according to the first embodiment will be described with reference to FIGS. 7 to 10 and FIGS. 4 to 6 described above.

The lead wire fixing portion 40 holds and fixes a part of the lead wire 60. Specifically, the lead wire fixing portion 40 holds the end portion of the covering portion 64 on the core wire exposed portion 63 side and the end portion of the core wire exposed portion 63 on the covering portion 64 side, and fixes the portion. .. The lead wire fixing portion 40 is provided for each lead wire 60. That is, the motor 1 according to the first embodiment includes three lead wire fixing portions 40. Further, the lead wire fixing portion 40 projects outward from the outer peripheral portion of the wiring portion 32. That is, at least a part of the lead wire fixing portion 40 is arranged outside the outer peripheral portion of the wiring portion 32 in the radial direction of the wiring portion 32.

The lead wire fixing portion 40 according to the first embodiment includes a first welding portion 41, a lead wire supporting portion 42, a wall 43, a wall 44, and a wall 45.

The wall 43 and the wall 44 face each other in a direction perpendicular to the direction in which the lead wire wiring component 31 and the stator 20 face each other. A lead wire 60 is arranged between the wall 43 and the wall 44. Further, the wall 43 and the wall 44 face the end portion of the covering portion 64 on the core wire exposed portion 63 side and the end portion of the core wire exposed portion 63 on the covering portion 64 side. Further, the gap between the wall 43 and the wall 44 has substantially the same dimensions as the covering portion 64 in the range facing the covering portion 64. That is, the covering portion 64 is sandwiched between the wall 43 and the wall 44.

The wall 45 is provided on the wall 43 and the wall 44 at the end opposite to the end on the stator 20 side. That is, the wall 45 faces the lead wire 60 at a position opposite to the stator 20 with respect to the lead wire 60 arranged in the lead wire fixing portion 40. Here, as shown in FIGS. 7 and 8, in the state before the first welding portion 41 is formed on the lead wire fixing portion 40, the wall 45 has the core wire exposed portion 63 with respect to the covering portion 64. It does not face a predetermined range from the boundary portion 65 with the covering portion 64. Further, in the state before the first welding portion 41 is formed on the lead wire fixing portion 40, the wall 45 does not face the core wire exposed portion 63. Therefore, in the state before the first welding portion 41 is formed in the lead wire fixing portion 40, the lead wire fixing portion 40 has an opening 46 formed at the outer end portion in the radial direction of the wiring portion 32. ing. The core wire exposed portion 63 of the lead wire 60 held by the lead wire fixing portion 40 is pulled out from the opening 46 to the outside of the lead wire fixing portion 40.

The lead wire support portion 42 is provided at the end of the wall 43 and the wall 44 on the stator 20 side. Further, the lead wire support portion 42 is arranged on the opposite side of the opening 46 with respect to the lead wire 60. That is, the lead wire support portion 42 is provided so as to face the covering portion 64 portion in a predetermined range from the boundary portion 65 and the core wire exposed portion 63 portion in a predetermined range from the boundary portion 65. Therefore, the lead wire fixing portion 40 has an opening 47 formed in a portion inside the lead wire support portion 42 in the radial direction of the wiring portion 32. When the lead wire fixing portion 40 holds the lead wire 60, the lead wire 60 is inserted into the lead wire fixing portion 40 through the opening 47. Here, as shown in FIGS. 9 and 10, the first welded portion 41 is formed at the position of the opening 46. Therefore, in the state after the first welded portion 41 is formed on the lead wire fixing portion 40, the lead wire supporting portion 42 is the first welded portion 41 of the lead wire fixing portion 40 with respect to the lead wire 60. It is the part located on the opposite side of.

In the lead wire fixing portion 40 according to the first embodiment, the core wire exposed portion 63 is pulled out from the lead wire fixing portion 40 without bending the core wire exposed portion 63 in the lead wire fixing portion 40. Therefore, the step portion 48 is formed at a position facing the boundary portion 65 of the lead wire 60 on the lead wire support portion 42, the wall 43, and the wall 44. The step of the step portion 48 is equal to or greater than the distance between the outer peripheral surface of the core wire exposed portion 63 and the outer peripheral surface of the covering portion 64. When the lead wire 60 is held by the lead wire fixing portion 40, the lead wire 60 can be positioned by bringing the boundary portion 65 of the lead wire 60 into contact with the step portion 48.

As shown in FIGS. 9 and 10, the first welded portion 41 is provided at a position facing the boundary portion 65 of the lead wire 60. The first welded portion 41 is formed by melting the resin that is the material of the lead wire fixing portion 40. That is, the first welded portion 41 is formed by melting the resin which is the material of the lead wire fixing portion 40 and fixing it to the boundary portion 65 of the lead wire 60. As a result, the first welded portion 41 closes the boundary portion 65 of the lead wire 60 between the core wire 61 and the coating film 62. When forming the first welding portion 41, for example, the material of the lead wire fixing portion 40 is melted by a heat or ultrasonic welding machine. Further, in the first embodiment, the first welding portion 41 is provided on the anti-stator facing surface 32b side of the stator facing surface 32a and the anti-stator facing surface 32b of the wiring portion 32.

Further, in the first embodiment, the first welded portion 41 is formed in the following shape.

As shown in FIG. 10, the direction of the lead wire 60 wired to the lead wire fixing portion 40 is defined as the D direction. In the first welded portion 41 according to the first embodiment, the angle α on the covering portion 64 side is an acute angle among the angles formed by the D direction and the surface of the first welded portion 41. By forming the first welded portion 41 in this way, when comparing the positions of the first welded portion 41, it is possible to suppress the difference in the distance between the surface of the first welded portion 41 and the lead wire 60. can. As a result, it is possible to suppress the portion where the resin, which is the material of the lead wire fixing portion 40, does not dissolve around the boundary portion 65 of the lead wire 60, and it is possible to more reliably close the space between the core wire 61 and the coating film 62 at the boundary portion 65. ..

As shown in FIG. 9, in the first welded portion 41 according to the first embodiment, the position of the end portion 41a of the first welded portion 41 on the core wire exposed portion 63 side is the core wire exposed portion of the lead wire supporting portion 42. It is in the same position as the end portion 42a on the 63 side. By configuring the first welded portion 41 in this way, when the first welded portion 41 is observed in the direction opposite to the first welded portion 41 and the lead wire 60, that is, the first welded portion 41 is formed as shown in FIG. When observed, the core wire up to the boundary portion 65 is formed in order to form the maximum first welded portion 41 in the installation portion of the core wire exposed portion 63 in the lead wire support portion 42, that is, because the distance from the boundary portion 65 is the maximum. 61 can be closed more reliably. Even if the position of the end 41a on the core wire exposed portion 63 side of the first welding portion 41 is farther from the covering portion 64 than the end portion 42a on the core wire exposed portion 63 side of the lead wire support portion 42. good. Even if the first welding portion 41 is configured in this way, the same effect can be obtained.

As shown in FIG. 9, the direction perpendicular to the lead wire 60 wired to the lead wire fixing portion 40 is defined as the width direction W. When the width direction W is defined in this way, in the first welded portion 41 according to the first embodiment, the first welded portion 41 and the lead are opposed to each other in the opposite direction between the first welded portion 41 and the lead wire supporting portion 42. When observing the wire support portion 42, the dimension W1 in the width direction W of the first welded portion 41 is equal to or greater than the dimension W2 in the width direction W of the lead wire support portion 42. By configuring the first welded portion 41 in this way, when the first welded portion 41 is observed in the direction opposite to the first welded portion 41 and the lead wire supporting portion 42, that is, the first welded portion as shown in FIG. When observing 41, the wall 43 and the wall 44, which are the portions that close the opening 46, can be fully used, and the boundary portion 65 can more reliably close the space between the core wire 61 and the coating film 62.

As shown in FIGS. 4 to 6, the core wire fixing portion 50 is arranged at a predetermined distance from the lead wire fixing portion 40 and holds the core wire exposed portion 63 drawn out from the lead wire fixing portion 40. .. A pair of a lead wire fixing portion 40 and a core wire fixing portion 50 is provided for each lead wire 60. That is, the motor 1 according to the first embodiment includes three sets of the lead wire fixing portion 40 and the core wire fixing portion 50.

The core wire fixing portion 50 includes a second welded portion 51, a protrusion 52, and a protrusion 53. The protrusion 52 projects outward from the outer peripheral portion of the wiring portion 32. That is, at least a part of the protrusion 52 is arranged outside the outer peripheral portion of the wiring portion 32 in the radial direction of the wiring portion 32. The protrusion 53 protrudes from the anti-stator facing surface 32b of the wiring portion 32. The core wire exposed portion 63 drawn out from the lead wire fixing portion 40 is routed to the protrusion 52. The core wire exposed portion 63 routed to the protrusion 52 is bent inward in the radial direction of the wiring portion 32 and is routed to the protrusion 53. The core wire exposed portion 63 routed to the protrusion 53 is entwined with the protrusion 53.

The second welded portion 51 fixes the core wire exposed portion 63, and is formed by melting the resin protrusion 53. That is, the second welded portion 51 is formed by melting the resin that is the material of the core wire fixing portion 50 and fixing it to the core wire exposed portion 63. As shown in FIG. 6, in the first embodiment, the second welded portion 51 is the anti-stator facing surface 32a and the anti-stator facing surface 32b of the wiring portion 32, similarly to the first welded portion 41. It is provided on the stator facing surface 32b side. See also FIGS. 2 and 3 for the configuration in which the first welded portion 41 and the second welded portion 51 are provided on the anti-stator facing surface 32b side.

Subsequently, an example of a method of manufacturing the mold stator 2 of the electric motor 1 will be described.
When manufacturing the mold stator 2, first, the stator 20 and the lead wire wiring component assembly 30 are manufactured.

The stator 20 is manufactured as follows.
A plurality of electromagnetic steel sheets punched into a predetermined shape are laminated and fixed to manufacture a stator core 21. Then, an insulating portion 22 is provided in each of the plurality of teeth of the stator core 21. Then, a magnet wire is wound around each insulating portion 22 to manufacture a coil 24. After that, the end of the magnet wire constituting the coil 24 is connected to each terminal 25, and the stator 20 is completed.

The lead wire wiring component assembly 30 is manufactured as follows.
As described above, the periphery of the boundary portion 65 of the lead wire 60 is held and fixed by the lead wire fixing portion 40. Here, in the lead wire fixing portion 40 according to the first embodiment, the covering portion 64 is sandwiched between the wall 43 and the wall 44. Therefore, the lead wire fixing portion 40 according to the first embodiment can suppress the movement of the periphery of the boundary portion 65 of the lead wire 60 when the lead wire 60 is routed to the lead wire wiring component 31. Therefore, by using the lead wire fixing portion 40 according to the first embodiment, it is possible to suppress wiring defects of the lead wire 60 and improve the quality of the motor 1.

Further, since the lead wire fixing portion 40 according to the first embodiment includes the wall 45, the periphery of the boundary portion 65 of the lead wire 60 is not easily touched. Therefore, the lead wire fixing portion 40 according to the first embodiment can further suppress the movement of the periphery of the boundary portion 65 of the lead wire 60 when the lead wire 60 is routed to the lead wire wiring component 31. Therefore, by using the lead wire fixing portion 40 according to the first embodiment, wiring defects of the lead wire 60 can be further suppressed, and the quality of the motor 1 is improved.

Further, in the lead wire fixing portion 40 according to the first embodiment, when the lead wire fixing portion 40 holds the lead wire 60, the boundary portion 65 of the lead wire 60 is brought into contact with the step portion 48. Therefore, by using the lead wire fixing portion 40 according to the first embodiment, the positional accuracy of the arrangement around the boundary portion 65 of the lead wire 60 is improved. Therefore, by using the lead wire fixing portion 40 according to the first embodiment, wiring defects of the lead wire 60 can be further suppressed, and the quality of the motor 1 is improved.

After the lead wire 60 is held by the lead wire fixing portion 40, the lead wire 60 is routed around the wiring portion 32 from the lead wire fixing portion 40 to the lead wire fixing portion 33. Then, the lead wire 60 is sandwiched and held between the lead wire 33 and the holding component 38 attached to the lead wire 33.

Further, after the lead wire 60 is held by the lead wire fixing portion 40, the core wire exposed portion 63 drawn out from the lead wire fixing portion 40 is routed to the core wire fixing portion 50. Then, the core wire exposed portion 63 routed to the core wire fixing portion 50 is routed in the core wire fixing portion 50. Specifically, the core wire exposed portion 63 drawn out from the lead wire fixing portion 40 is routed to the protrusion 52. The core wire exposed portion 63 routed to the protrusion 52 is bent inward in the radial direction of the wiring portion 32 and is routed to the protrusion 53. The core wire exposed portion 63 routed to the protrusion 53 is entwined with the protrusion 53 and held by the protrusion 53.

The lead wire fixing portion 40 holds the periphery of the boundary portion 65 of the lead wire 60, the core wire fixing portion 50 holds the core wire exposed portion 63, and then the lead wire fixing portion 40 forms the first welding portion 41. Further, the lead wire fixing portion 40 holds the periphery of the boundary portion 65 of the lead wire 60, the core wire fixing portion 50 holds the core wire exposed portion 63, and then the core wire fixing portion 50 forms the second welded portion 51. By forming the second welded portion 51 in the core wire fixing portion 50, the core wire exposed portion 63 can be firmly fixed in the second welded portion 51. Therefore, by forming the second welding portion 51 on the core wire fixing portion 50, it is possible to suppress the movement of the core wire exposed portion 63 during the manufacturing and transportation of the electric motor 1. Therefore, by forming the second welded portion 51, wiring defects of the lead wire 60 can be further suppressed, and the quality of the motor 1 is improved.

Here, in the lead wire wiring component 31 according to the first embodiment, the first welded portion 41 and the second welded portion 51 of the core wire fixing portion 50 are opposed to the stator facing surface 32a and the anti-stator facing surface 32a of the wiring portion 32. Of the surfaces 32b, the anti-stator facing surface 32b is provided. Therefore, in the lead wire wiring component 31 according to the first embodiment, the first welded portion 41 and the second welded portion 51 of the core wire fixing portion 50 can be formed at the same time. Therefore, the manufacturing cost of the motor 1 can be reduced. Here, the first welded portion 41 and the second welded portion 51 of the core wire fixing portion 50 are provided on the stator facing surface 32a side of the stator facing surface 32a and the anti-stator facing surface 32b of the wiring portion 32. You may. If the first welding portion 41 and the second welding portion 51 of the core wire fixing portion 50 are arranged on the same surface side of the stator facing surface 32a and the anti-stator facing surface 32b of the wiring portion 32, the first welding portion By forming the second welding portion 51 of the core wire fixing portion 50 and the core wire fixing portion 50 at the same time, it is possible to obtain the effect of reducing the manufacturing cost of the electric motor 1. The first welded portion 41 and the second welded portion 51 of the core wire fixing portion 50 may be provided on different surfaces of the stator facing surface 32a and the anti-stator facing surface 32b of the wiring portion 32. .. Although the effect of reducing the manufacturing cost of the motor 1 cannot be obtained by forming the first welded portion 41 and the second welded portion 51 of the core wire fixing portion 50 at the same time, it is possible to obtain other effects shown in the first embodiment. can.

After manufacturing the stator 20 and the lead wire wiring component assembly 30 as described above, the stator 20 is inserted into the hole 35 formed in the mounting foot 34 of the lead wire wiring component 31 of the lead wire wiring component assembly 30. The protrusion 23 formed on the insulating portion 22 is inserted. After that, the lead wire wiring component assembly 30 is attached to one end of the stator 20 by melting the tip of the protrusion 23 and forming a flange at the tip of the protrusion 23. Further, before or after forming the flange, the terminal of the stator 20 is positioned between the lead wire fixing portion 40 and the core wire fixing portion 50 in the core wire exposed portion 63 of the lead wire 60 by soldering or welding. Connect to 25.

After the lead wire wiring component assembly 30 is attached to one end of the stator 20, a mold portion 8 is formed by molding, and the stator 20, a part of the lead wire 60, and the lead wire wiring component 31 are formed by the mold portion 8. cover. Specifically, the stator 20 to which the lead wire wiring component assembly 30 is assembled is arranged in the mold. In this state, a thermosetting material such as BMC is poured. As a result, the stator 20 to which the lead wire wiring component assembly 30 is assembled can be covered with the mold portion 8.

Here, when the mold portion 8 is formed by molding, the air in the mold is pushed by the thermosetting material poured into the mold, and is pushed out of the mold while being compressed. At this time, in the conventional electric motor provided with the mold stator, a part of the air compressed by the thermosetting material poured into the mold is discharged from the boundary portion between the covering portion and the core wire exposed portion in the lead wire. In some cases, the coating flowed between the core wire and the coating, and the coating was damaged.

On the other hand, in the motor 1 according to the first embodiment, the first welding portion 41 is provided at the boundary portion 65 between the covering portion 64 and the core wire exposed portion 63 in the lead wire 60. Therefore, in the motor 1 according to the first embodiment, the path through which air flows between the core wire 61 of the lead wire 60 and the coating film 62 is blocked by the first welding portion 41 as compared with the conventional case. Therefore, the motor 1 according to the first embodiment can suppress the inflow of air between the core wire 61 of the lead wire 60 and the coating film 62 as compared with the conventional case. That is, the quality of the mold stator 2 of the motor 1 according to the first embodiment can be improved as compared with the conventional case. Therefore, the quality of the electric motor 1 according to the first embodiment can also be improved as compared with the conventional electric motor by improving the quality of the mold stator 2. Further, in the motor 1 according to the first embodiment, the number of defective products of the mold stator 2 is reduced by improving the quality of the mold stator 2, so that the manufacturing cost of the motor 1 can be reduced.

Further, in the first welded portion 41 according to the first embodiment, the angle α on the covering portion 64 side is an acute angle among the angles formed by the D direction and the surface of the first welded portion 41. Therefore, as described above, the first welded portion 41 according to the first embodiment can more reliably close the gap between the core wire 61 and the coating film 62 at the boundary portion 65. Therefore, the quality of the motor 1 according to the first embodiment is further improved, and the manufacturing cost is further reduced.

Further, in the first welded portion 41 according to the first embodiment, the position of the end portion 41a of the first welded portion 41 on the core wire exposed portion 63 side is the end portion of the lead wire supporting portion 42 on the core wire exposed portion 63 side. It is in the same position as 42a. Therefore, as described above, the first welded portion 41 according to the first embodiment can more reliably close the core wire 61 at the boundary portion 65. Therefore, the quality of the motor 1 according to the first embodiment is further improved, and the manufacturing cost is further reduced.

Further, in the first welded portion 41 according to the first embodiment, the dimension W1 in the width direction W of the first welded portion 41 is equal to or larger than the dimension W2 in the width direction W of the lead wire support portion 42. Therefore, as described above, the first welded portion 41 according to the first embodiment can more reliably close the opening 46. Therefore, the quality of the motor 1 according to the first embodiment is further improved, and the manufacturing cost is further reduced.

As described above, the motor 1 according to the first embodiment includes a stator 20, a lead wire 60, a lead wire wiring component 31, and a mold portion 8. The stator 20 has a coil 24 and a terminal 25 to which the end of the coil 24 is connected. The lead wire 60 has a core wire 61 and a coating film 62 that covers the core wire 61. In the lead wire 60, a core wire exposed portion 63 in which the core wire 61 is exposed is formed at one end, and the core wire exposed portion 63 is connected to the terminal 25. The lead wire wiring component 31 holds the lead wire 60 and is attached to one end of the stator 20. The mold portion 8 covers the stator 20 and the lead wire wiring component 31 with resin. Further, the lead wire wiring component 31 includes a lead wire fixing portion 40 made of resin. When the portion of the lead wire 60 where the core wire 61 is covered with the coating 62 is used as the covering portion 64, the lead wire fixing portion 40 is the end portion of the covering portion 64 on the core wire exposed portion 63 side and the covering portion 64 of the core wire exposed portion 63. Holds the side edge. Then, in the lead wire fixing portion 40, the resin which is the material of the lead wire fixing portion 40 is melted at the boundary portion 65 between the covering portion 64 and the core wire exposed portion 63 and fixed to the boundary portion 65. It has.

In the motor 1 configured in this way, as described above, it is possible to suppress the inflow of air between the core wire 61 of the lead wire 60 and the coating film 62 as compared with the conventional case. That is, the quality of the mold stator 2 of the motor 1 according to the first embodiment can be improved as compared with the conventional case. Therefore, the quality of the electric motor 1 according to the first embodiment can also be improved as compared with the conventional electric motor by improving the quality of the mold stator 2. Further, in the motor 1 according to the first embodiment, the number of defective products of the mold stator 2 is reduced by improving the quality of the mold stator 2, so that the manufacturing cost of the motor 1 can be reduced.

Embodiment 2.
In the second embodiment, an example of an air conditioner using the motor 1 shown in the first embodiment as a drive source of the blower will be described. In the second embodiment, items not particularly described will be the same as those in the first embodiment, and the same functions and configurations as those in the first embodiment will be described using the same reference numerals as those in the first embodiment.

FIG. 11 is a diagram showing a configuration of an air conditioner according to the second embodiment.
The air conditioner 100 includes an indoor unit 110 and an outdoor unit 120 connected to the indoor unit 110.

The indoor unit 110 includes a blower 111. The blower 111 includes the electric motor 1 shown in the first embodiment and a fan 112 attached to the drive shaft 12 of the electric motor 1. The fan 112 is, for example, a line flow type fan. That is, the blower 111 of the indoor unit 110 is driven by the electric motor 1 shown in the first embodiment. As the drive shaft 12 of the electric motor 1 rotates, the fan 112 also rotates together with the drive shaft 12. As a result, the air in the air-conditioned space is sucked into the indoor unit 110. Then, the air in the air-conditioned space sucked into the indoor unit 110 is heated or cooled by the refrigerant flowing in the indoor heat exchanger (not shown), and is blown out from the indoor unit 110 into the air-conditioned space.

The outdoor unit 120 includes a blower 121. The blower 121 includes the electric motor 1 shown in the first embodiment and a fan 122 attached to the drive shaft 12 of the electric motor 1. The fan 122 is, for example, a propeller type fan. That is, the blower 121 of the outdoor unit 120 is driven by the electric motor 1 shown in the first embodiment. As the drive shaft 12 of the electric motor 1 rotates, the fan 122 also rotates together with the drive shaft 12. As a result, the outdoor air is sucked into the outdoor unit 120. Then, the outdoor air sucked into the outdoor unit 120 heats or cools the refrigerant flowing in the outdoor heat exchanger (not shown), and is blown out from the outdoor unit 120 to the outside.

The air conditioner 100 according to the second embodiment uses the motor 1 shown in the first embodiment as a drive source for the blower 111 and the blower 121. As described above, the electric motor 1 shown in the first embodiment can improve the quality as compared with the conventional electric motor. Further, the electric motor 1 shown in the first embodiment can reduce the manufacturing cost. Therefore, the air conditioner 100 according to the second embodiment is a high quality air conditioner capable of reducing the manufacturing cost.

In the second embodiment, the motor 1 shown in the first embodiment is used as the drive source for the blower 111 and the blower 121. Not limited to this, the motor 1 shown in the first embodiment may be used as the drive source of the blower 111, and the conventional motor may be used as the drive source of the blower 121. Further, the motor 1 shown in the first embodiment may be used as the drive source of the blower 121, and the conventional motor may be used as the drive source of the blower 111. If the motor 1 shown in the first embodiment is used as the drive source for at least one of the blower 111 and the blower 121, the above-mentioned effect can be obtained.

1 motor, 2 mold stator, 3 rotor assembly, 4 bracket, 6 bearing, 7 bearing, 8 mold part, 10 rotor magnet, 11 rotating shaft, 12 drive shaft, 20 stator, 21 stator core, 22 Insulation part, 23 protrusions, 24 coils, 25 terminals, 30 lead wire wiring parts assembly, 31 lead wire wiring parts, 32 wiring parts, 32a stator facing surface, 32b anti-stator facing surface, 33 outlets, 34 mounting legs , 35 holes, 37 inner wall, 38 holding parts, 40 lead wire fixing part, 41 first welding part, 41a end part, 42 lead wire support part, 42a end part, 43 wall, 44 wall, 45 wall, 46 opening, 47 opening, 48 steps, 50 core wire fixing part, 51 second welding part, 52 protrusion, 53 protrusion, 60 lead wire, 61 core wire, 62 coating, 63 core wire exposed part, 64 covering part, 65 boundary part, 100 air Harmonizer, 110 indoor unit, 111 blower, 112 fan, 120 outdoor unit, 121 blower, 122 fan.

Claims

A stator with a coil and terminals to which the ends of the coil are connected, and
A lead wire having a core wire and a coating film covering the core wire, an exposed core wire portion having the exposed core wire formed at one end, and the exposed core wire portion connected to the terminal.
A lead wire wiring component that holds the lead wire and is attached to one end of the stator.
A mold portion that covers the stator and the lead wire wiring component with resin,
With
When the portion of the lead wire in which the core wire is covered with the coating is used as the covering portion,
The lead wire wiring component is formed of a resin and includes a lead wire fixing portion that holds an end portion of the covering portion on the core wire exposed portion side and an end portion of the core wire exposed portion on the covering portion side.
The lead wire fixing portion includes a first welding portion in which a resin, which is a material of the lead wire fixing portion, is melted and fixed to the boundary portion at a boundary portion between the covering portion and the core wire exposed portion. ..
The motor according to claim 1, wherein the angle between the direction of the lead wire wired to the lead wire fixing portion and the surface of the first welded portion on the covering portion side is an acute angle. ..
When the portion of the lead wire fixing portion that is arranged on the opposite side of the first welded portion with respect to the lead wire is used as the lead wire supporting portion.
The position of the end portion of the first welded portion on the core wire exposed portion side is the same position as the end portion of the lead wire support portion on the core wire exposed portion side, or the core wire of the lead wire support portion. The electric wire according to claim 1 or 2, wherein the position is farther from the covering portion than the end portion on the exposed portion side.
Of the lead wire fixing portions, a portion arranged on the opposite side of the first welding portion with respect to the lead wire is used as a lead wire supporting portion.
When the direction perpendicular to the direction of the lead wire wired to the lead wire fixing portion is defined as the width direction,
When the first welded portion and the lead wire support portion are observed in the opposite direction of the first welded portion and the lead wire support portion, the dimension in the width direction of the first welded portion is the lead wire support. The electric motor according to any one of claims 1 to 3, which is equal to or larger than the dimension in the width direction of the portion.
The lead wire wiring component is
A core wire fixing portion formed of resin and holding the core wire exposed portion, and a core wire fixing portion.
A wiring portion in which the core wire fixing portion and the lead wire fixing portion are provided and the lead wire is routed,
With
The core wire fixing portion includes a second welded portion in which the resin that is the material of the core wire fixing portion is melted and fixed to the core wire exposed portion.
When the surface of the wiring portion facing the stator is a stator facing surface and the surface of the wiring portion opposite to the stator facing surface is an anti-stator facing surface.
The aspect according to any one of claims 1 to 4, wherein the core wire fixing portion and the lead wire fixing portion are provided on the same surface side of the stator facing surface and the anti-stator facing surface. Electric motor.
Equipped with a blower
The blower
The electric motor according to any one of claims 1 to 5.
The fan driven by the motor and
Air conditioner equipped with.