JP7378590B2 - Electric motor, lead wire winding device, and electric motor manufacturing method - Google Patents

Description

The present disclosure relates to a motor having a lead wire for power supply, a lead wire winding device for winding the lead wire of the motor, and a method of manufacturing the motor.

Patent Document 1 discloses an electric motor having a lead wire in which a plurality of electric wires are covered with a covering material.

Japanese Patent Application Publication No. 2014-87219

Conventionally, when it is necessary to bundle the lead wires of an electric motor, the lead wires have been manually bent. However, when the lead wires are manually bent, depending on the bending method, excessive stress may be generated in a portion of the lead wires, which may cause the wires to break.

The present disclosure solves the above-mentioned problems, and aims to provide a motor, a lead wire winding device, and a method for manufacturing the motor that can suppress the occurrence of wire breakage.

The electric motor of the present disclosure includes a rotational drive device that converts electric power into rotational energy, and a lead wire that is connected to the rotational drive device and supplies the electric power to the rotational drive device, and the lead wire is configured to convert the electric power into rotational energy. It has a plurality of covered electric wires including the electric wires to be supplied to the rotary drive device, and a covering body that covers the plurality of covered electric wires and is wound in a spiral shape and laminated together with the plurality of covered electric wires. , the covering body has a plurality of straight parts and a plurality of bent parts arranged alternately with the plurality of straight parts, and is laminated in the same shape.

Further, a lead wire winding device of the present disclosure is a lead wire winding device for manufacturing the above-mentioned electric motor, and includes a pedestal having a clamp for fastening the rotary drive device, and a distal end of the covering. The device includes a clip to be gripped and a rotary body on which the clip is arranged, and a rotary table that winds the covering body around the rotary body by rotation of the rotary body.

Further, the method of manufacturing an electric motor of the present disclosure is the method of manufacturing the electric motor described above, which includes the steps of fastening the rotary drive device, gripping the distal end of the covering, and winding the covering. and a step of causing.

In the present disclosure, since the lead wire sheath is spirally wound and laminated, excessive stress is not generated in a portion of the lead wire. Therefore, disconnection of the covered wire covered by the covering can be suppressed.

1 is a perspective view showing an example of an electric motor according to Embodiment 1. FIG. FIG. 3 is a schematic diagram showing an example of a lead wire winding device according to a second embodiment. FIG. 7 is a schematic diagram showing the winding operation of the lead wire 20 in the lead wire winding device 100 according to the second embodiment. 7 is a flowchart showing a manufacturing process of an electric motor using a lead wire winding device according to a second embodiment.

Embodiment 1.
An electric motor 1 according to Embodiment 1 will be described using FIG. 1. FIG. 1 is a perspective view showing an example of a motor 1 according to the first embodiment. Note that in the following drawings including FIG. 1, the dimensional relationship and shape of each component may differ from the actual one. Furthermore, in the following drawings, the same members or portions or members or portions having the same functions are given the same reference numerals or are omitted.

The electric motor 1 is formed, for example, as a molded DC brushless motor. The electric motor 1 includes a rotary drive device 10 having a stator 3 having a hollow cylindrical appearance and a rotor 5 rotatably housed in the hollow portion of the stator 3. The rotary drive device 10 has a cylindrical outer shell 10a formed by the stator 3 and the rotor 5. The electric motor 1 also includes a lead wire 20 that is connected to the outer shell 10a of the rotary drive device 10 and supplies power to the rotary drive device 10.

In the rotary drive device 10, electric power supplied via the lead wire 20 is converted into rotational energy. In the rotary drive device 10, a magnetic field is generated in the stator 3 by electric power supplied through the lead wire 20, and the rotor 5 rotates due to a change in the magnetic field generated in the stator 3 over time.

Although not shown, the stator 3 includes a hollow cylindrical stator core, an insulator disposed on a pair of hollow disk surfaces of the stator core, and a wire such as a copper magnet wire between the stator core and the insulator. The main body portion includes a coil formed by winding. In the stator 3, a magnetic field is generated in the hollow side of the stator core when a current flows through the coil. When the current flowing through the coil is an alternating current, the magnetic field generated in the hollow side of the stator core changes over time.

The main body portion of the stator 3 is covered with a thermosetting resin such as a bulk molding compound whose main component is unsaturated polyester resin. The stator 3 is constructed by placing the main body of the stator 3 and the tip of the lead wire 20 electrically connected to the main body of the stator 3 in a mold, and filling the mold by injecting thermosetting resin. It is molded by. The molding may be performed by compression molding. Note that bulk molding compound is abbreviated as BMC.

Although not shown, the rotor 5 includes resin magnets that generate a magnetic field radially in the direction of the stator 3. Resin magnets are raw materials made by incorporating rare earth magnet powder such as samarium iron or ferrite powder such as neodymium-iron-boron powder into a thermoplastic resin such as polyamide resin such as nylon or polyphenylene sulfide resin, and can be used as a bonded magnet. molded. The resin magnet has magnetic poles that are a multiple of two. The resin magnets are arranged on the outer periphery of the rotor 5, and the magnetic poles of the resin magnets are formed so that their polarities alternate along the circumferential direction of the rotor 5. For example, a resin magnet is formed with eight magnetic poles, and four N poles and four S poles are formed alternately in the circumferential direction. Due to changes over time in the magnetic field generated by the stator 3, the rotor 5 rotates in the circumferential direction around the axis of the rotor 5.

A lead wire 20 connected to the outer shell 10a of the rotary drive device 10 has a plurality of covered wires 22. One end of the plurality of covered electric wires 22 is drawn into the stator 3 from the lead-in port 10a1 of the outer shell 10a. A first connector 24a or a second connector 24b is connected to the other end of the plurality of covered wires 22. In the following description, the first connector 24a and the second connector 24b will be collectively referred to as the connector 24 unless there is a need to distinguish between them.

The first connector 24a is connected to, for example, an inverter circuit that supplies power to the electric motor 1 through switching control and controls the rotation speed of the electric motor 1. When the electric motor 1 is a three-phase synchronous motor, three electric wires, such as a U-phase electric wire, a V-phase electric wire, and a W-phase electric wire, which supply electric power to the rotary drive device 10 are connected to the first connector 24a. Note that the number of electric wires that supply power to the rotary drive device 10 differs depending on the type of the electric motor 1. For example, when the electric motor 1 is a single-phase electric motor, the number of electric wires that supply electric power to the rotary drive device 10 is one.

The second connector 24b is connected, for example, to a control circuit that transmits a control signal to the inverter circuit and performs switching control of the inverter circuit. When the motor 1 is a three-phase synchronous motor, for example, four communication lines and one neutral line are connected to the second connector 24b. The communication line includes, for example, a U-phase current sensor built into the stator 3 that detects the U-phase current, a V-phase current sensor that detects the V-phase current, a W-phase current sensor that detects the W-phase current, and the rotor 5. connected to a magnetic sensor that detects the position of the Further, the neutral wire is grounded at a neutral point via the second connector 24b, and is connected to a neutral point terminal of the electric wiring inside the stator 3. Note that the U-phase current sensor, V-phase current sensor, W-phase current sensor, magnetic sensor, and neutral point terminal are not shown in FIG. Further, the U-phase current sensor, V-phase current sensor, W-phase current sensor, and magnetic sensor are formed of Hall elements made of indium antimonide or gallium arsenide, for example. Note that the number of communication lines varies depending on the type of electric motor 1, and it is also possible to omit the communication lines.

Note that the number of connectors 24 of the lead wire 20 does not have to be two, that is, the first connector 24a and the second connector 24b. For example, the lead wire 20 may have three or more connectors 24, or may have only one connector 24.

The lead wire 20 has a covering 30 that collectively covers the plurality of covered wires 22. The covering body 30 is formed into a tubular shape of silicone rubber or the like, for example, and is disposed to extend between the inlet port 10a1 of the outer shell 10a of the rotary drive device 10 and the connector 24. In the present disclosure, the end of the covering 30 on the connector 24 side is referred to as the distal end 30a of the covering 30, and the end of the covering 30 on the inlet port 10a1 side is referred to as the proximal end 30b of the covering 30. A binding band 32 for suppressing movement of the covering 30 is provided at the proximal end 30b of the covering 30.

The sheath 30 of the lead wire 20 is spirally wound and laminated together with the plurality of covered wires 22 . The covering body 30 wound and laminated in a "helical shape" is not limited to a circular shape, but may have any other shape as long as it is wound and laminated in an O-shape. For example, the covering body 30 wound and laminated in a "helical shape" may have an elliptical shape or an oval shape. When the sheath 30 of the lead wire 20 is wound in an oval shape, the sheath 30 of the lead wire 20 has a plurality of straight parts 34 and a plurality of bent parts arranged alternately with the plurality of straight parts 34. 36.

Furthermore, the coverings 30 of the lead wires 20 can be stacked in the same shape. Note that in FIG. 1, the sheath 30 of the lead wire 20 is wound so that the connector 24 faces the rotary drive device 10, but it may be wound so that the connector 24 faces away from the rotary drive device 10. Good too.

The lead wire 20 is generally formed to extend in a straight line. Further, the lead wire 20 is formed to have various lengths depending on the use of the electric motor 1. In a state where the lead wire 20 extends in a straight line, as the lead wire 20 becomes longer, excessive stress may be generated in the lead wire 20 due to, for example, the lead wire 20 becoming entangled with a manufacturing machine during the manufacturing process, and the lead wire 20 may become disconnected. damage is more likely to occur. Further, in manual processes such as inspecting the electric motor 1, excessive tension may be generated in the lead wire 20, and damage such as wire breakage may occur in the lead wire 20. Furthermore, when the electric motor 1, which is the final product, is transported, if the lead wires 20 are stretched in a straight line, the efficiency of the packing work can be improved by manually storing the lead wires 20 when packing the electric motor 1. There is a possibility that it will decrease.

Conventionally, when bundling the lead wires 20 that are formed in a straight line, the lead wires 20 have been manually bent. This may cause damage such as breakage of the lead wire 20.

However, in the first embodiment, the covering 30 of the lead wire 20 is wound in a spiral shape. By winding the sheath 30 of the lead wire 20 in a spiral shape, excessive stress can be suppressed from being applied to a portion of the lead wire 20. Therefore, by winding the sheath 30 of the lead wire 20 in a helical shape, breakage of the lead wire 20 can be suppressed, so that the reliability of the electric motor 1 can be improved.

Further, by winding the sheath 30 of the lead wire 20 in a spiral shape and stacking them, the lead wire 20 is wound in the same shape. Therefore, even if the number of turns of the lead wire 20 increases, the shape of the wound lead wire 20 does not expand, so that the wound shape can be stabilized. Further, by winding the lead wires 20 in the same shape, the work of bundling the lead wires 20 when transporting the electric motor 1 as a final product becomes easier. In addition, when a housing part for the lead wire 20 is formed in the transport container of the electric motor 1, the lead wire 20 can be easily stored in the transport container by winding the lead wire 20 in the same shape. The efficiency of packing work during transportation is improved.

Furthermore, by forming the sheath 30 of the lead wire 20 to have a plurality of straight portions 34, the sheath 30 of the lead wire 20 can be wound with a constant width. As described above, the lead wire 20 is formed to have various lengths depending on the use of the electric motor 1, but by adjusting the length of the straight portion 34, it can be made without depending on the length of the lead wire 20. In addition, the number of turns of the lead wire 20 can be made the same. Therefore, when manufacturing the electric motor 1, it is not necessary to adjust the winding start position and winding end position of the lead wire 20 in the stacking direction according to the length of the lead wire 20, so that the manufacturing efficiency of the electric motor 1 is improved. .

Furthermore, by forming the covering 30 of the lead wire 20 to have a plurality of bent portions 36, excessive stress can be suppressed from being generated in a portion of the lead wire 20. The stress generated in the bent portion 36 can be adjusted by adjusting the radius of curvature of the bent portion 36. Furthermore, by making the radius of curvature of the bent portions 36 the same, stress generated in the bent portions 36 can be made uniform. Therefore, by forming the covering body 30 of the lead wire 20 to have a plurality of bent portions 36, breakage of the lead wire 20 can be suppressed, and thus reliability of the electric motor 1 can be improved.

The electric motor 1 described above is used, for example, as an electric motor 1 that rotationally drives a blower fan provided in an air conditioner. A blower fan equipped with the electric motor 1 can be used, for example, in an indoor unit or an outdoor unit of an air conditioner. Moreover, the application of the electric motor 1 is not limited to the above-mentioned one, but can also be used in a refrigeration cycle device having a blower fan other than an air conditioner, or an electric device having a blower fan other than a refrigeration cycle device. Further, the electric motor 1 can also be applied to a rotating machine other than a blower fan, such as a ventilation fan. The electric motor 1 can also be designed as a stepping motor for a pressure reducing device of an air conditioner.

Moreover, although the case where the electric motor 1 is a molded DC brushless motor has been described above, the electric motor 1 of the present disclosure may be an electric motor 1 of a type other than the molded DC brushless motor. Further, the stator 3 of the electric motor 1 does not need to be molded, and the main body portion of the stator 3 may be housed in a thermoplastic resin casing.

Embodiment 2.
In Embodiment 2, a lead wire winding device 100 for manufacturing the electric motor 1 of Embodiment 1 will be described using FIGS. 2 and 3. FIG. 2 is a schematic diagram showing an example of the lead wire winding device 100 according to the second embodiment. FIG. 3 is a schematic diagram showing the winding operation of the lead wire 20 in the lead wire winding device 100 according to the second embodiment. Note that the structure of the electric motor 1 shown in FIGS. 2 and 3 is the same as that described in the above-mentioned Embodiment 1, so a description thereof will be omitted.

The lead wire winding device 100 includes a rotating table 50 that is rotatably arranged. The rotary table 50 may be of a mechanical type that is manually rotated using a handle or the like, or may be of an electrically driven type that is automatically rotated using a rotary table driving electric motor.

The rotating table 50 has a rotating body 51, and the rotation of the rotating body 51 causes the covering 30 of the lead wire 20 to be wound in a spiral shape and laminated. The rotating body 51 is formed, for example, as a single pillar having a cylindrical shape, an elliptical cylindrical shape, or an elongated cylindrical shape, depending on the winding shape of the covering body 30.

Further, the rotating body 51 is provided with a clip 53. Clip 53 is formed to grip distal end 30a of covering 30. The clip 53 is formed, for example, as an L-shaped hook so that the distal end 30a of the cover 30 is held between the clip 53 and the rotating body 51.

Moreover, the rotating body 51 can be formed to have a plurality of columns. For example, the rotating body 51 can be formed to have a first arm 51a on which the clip 53 is disposed, and a second arm 51b disposed apart from the first arm 51a. The rotating body 51 is formed to have a first arm 51a and a second arm 51b, and the width of the winding of the covering 30 can be adjusted by adjusting the distance between the first arm 51a and the second arm 51b. and the number of times can be determined. Therefore, if the rotating body 51 is formed to have a first arm 51a and a second arm 51b, and the distance between the first arm 51a and the second arm 51b is adjustable, the winding of the covering body 30 can be adjusted. The width and number of times can be adjusted arbitrarily. For example, the number of turns of the lead wire 20 can be adjusted to be the same regardless of the length of the lead wire 20.

The surfaces of the first arm 51a and the second arm 51b that the covering body 30 contacts are formed to be curved surfaces. By making the surfaces of the first arm 51a and the second arm 51b where the sheathing 30 comes into contact be curved surfaces, excessive stress can be suppressed from being applied to the lead wire 20 when the sheathing 30 is wound. Therefore, by making the surfaces of the first arm 51a and the second arm 51b that the covering bodies 30 contact into curved surfaces, breakage of the lead wires 20 can be suppressed, so that the reliability of the electric motor 1 can be improved.

Note that the first arm 51a and the second arm 51b may have a curved surface, for example, a cylindrical shape, an elliptical cylindrical shape, or an elongated shape. It can be formed as a cylindrical column.

Further, the rotating table 50 has a base 55 on which the rotating body 51 is placed and supported. Further, the rotating body 51 has a shaft 57 that is fixed to the center of gravity of the base 55, extends in the opposite direction to the rotating body 51, and serves as a rotation axis of the rotating body 51. The base 55 can be formed to movably support the first arm 51a and the second arm 51b.

Further, the lead wire winding device 100 has a pedestal 80 on which the rotary drive device 10 is placed and fixed. A clamp 81 is provided on the base 80 , and the rotation drive device 10 is fastened to the base 80 by the clamp 81 .

The lead wire winding device 100 can be provided with an adjuster 83 that supports the pedestal 80 as a leg portion of the pedestal 80. The adjuster 83 can be formed using, for example, an adjuster bolt, but is not limited thereto, and may be formed as a hydraulic cylinder.

The adjuster 83 can adjust the height of the pedestal 80 and determine the relative height between the distal end 30a of the covering 30 and the rotary drive device 10. The optimum relative value of the height between the distal end 30a of the covering 30 and the rotary drive device 10 is determined by the length of the lead wire 20 and the covering 30, the diameter of the covering 30, and the wound lead wire 20. It depends on the tension that suppresses the relaxation of the material, the winding of the covering 30, and the like. For example, if the length of the lead wire 20 is 1100 mm, the diameter of the lead wire 20 is 10 mm, and the longitudinal width of the wound lead wire 20 is 100 mm, the relative value of the height is 10 mm or more. 30 mm is preferable.

Note that the adjuster 83 may be formed as one adjuster 83 that supports the center of gravity of the pedestal 80, or may be formed so that the pedestal 80 is supported by a plurality of adjusters 83. Further, the adjuster 83 can be omitted if there is no need to adjust the relative height between the distal end 30a of the covering 30 and the rotary drive device 10.

Further, the lead wire winding device 100 can be provided with a slider 85 that slidably supports the pedestal 80. The slider 85 is formed to move the rotary drive device 10 in the direction of the distal end 30a of the covering 30 and wind the covering 30 of the lead wire 20 around the rotating body 51. The slider 85 includes, for example, a rail 85a that guides the pedestal 80 toward the rotary table 50, and a reciprocating table 85b that slides reciprocally on the rail 85a.

The slider 85 can be formed as an electrically driven device that moves at a constant speed in synchronization with the rotational movement of the turntable 50. Furthermore, the slider 85 may be formed to slide due to the tension of the lead wire 20 as the rotary table 50 rotates. By providing the slider 85 in the lead wire winding device 100, the sheathing 30 of the lead wire 20 can be wound around the rotating body 51 at a constant speed, so that the sheathing 30 can be wound uniformly, and the winding The shape can be stabilized. Therefore, by providing the slider 85 in the lead wire winding device 100, it is possible to ensure the same shape of the lead wire 20 in the electric motor 1, which is the final product, so that the work efficiency during packaging can be improved. Further, if the slider 85 is formed to slide due to the tension of the lead wire 20, the configuration of the lead wire winding device 100 can be simplified, and the manufacturing cost of the lead wire winding device 100 can be reduced.

Note that the slider 85 can be omitted, for example, when winding the sheath 30 of the lead wire 20 while bringing the turntable 50 close to the pedestal 80.

Further, the lead wire winding device 100 can be provided with a balance device 87 that is connected to the pedestal 80 and applies a constant tension to the lead wire 20. As the balance device 87, for example, a traction device is used that supports the pedestal 80 with a constant force by connecting the pedestal 80 with a rope and pulling it with a constant force. Further, the balance device 87 may be a weight or a hydraulic cylinder as long as it supports the pedestal 80 with a constant force.

By providing the balance device 87 in the lead wire winding device 100, the sheath 30 of the lead wire 20 is wound around the rotating body 51 while a constant tension is applied to the lead wire 20. Relaxation due to own weight can be suppressed. Therefore, by providing the balance device 87 in the lead wire winding device 100, it is possible to ensure the same shape of the lead wire 20 in the electric motor 1, which is the final product, so that the work efficiency during packaging can be improved.

Note that if the tension applied to the lead wire 20 by the balance device 87 exceeds 50 N, although relaxation of the lead wire 20 due to its own weight can be suppressed, the load on the lead wire 20 becomes large and breakage of the lead wire 20 occurs. there is a possibility. Therefore, the tension applied to the lead wire 20 by the balance device 87 is preferably 50 N or less.

Further, the balance device 87 may be used, for example, when winding the sheath 30 of the lead wire 20 while bringing the rotating table 50 close to the pedestal 80, or when the reciprocating table 85b of the slider 85 functions as a weight and the lead wire 20 is It can be omitted if additional tension is generated.

As described above, by manufacturing the electric motor 1 using the lead wire winding device 100, the process of bundling the lead wires 20 of the electric motor 1 can be automated, and damage caused by disconnection of the electric motor 1 can be avoided. can be reduced.

Conventionally, the process of bundling the lead wires 20 of the electric motor 1 has been performed manually, and the uniformity of the shape of the lead wires 20 cannot be ensured, resulting in a decrease in production efficiency. On the other hand, devices for bundling power cables, etc. for outdoor construction are known, but if the method of bundling power cables, etc. for outdoor construction is adopted for the motor 1, the equipment cost will be high, so a machine is used to lead the motor 1. A method for automatically bundling the wires 20 has not been put to practical use.

However, according to the lead wire winding device 100 of the second embodiment, it is possible to ensure the same shape of the lead wire 20 in the final product, the electric motor 1, with a simple device, thereby improving work efficiency during packaging. can be done. Therefore, according to the lead wire winding device 100 of the second embodiment, it is possible to reduce the manufacturing cost of the electric motor 1 while suppressing a decrease in the production efficiency of the electric motor 1.

Next, as an example of a method for manufacturing the electric motor 1, a method for manufacturing the electric motor 1 using the lead wire winding device 100 will be described with reference to FIG. FIG. 4 is a flowchart showing the manufacturing process of the electric motor 1 using the lead wire winding device 100 according to the second embodiment. Note that all or part of the steps described below can be automated by a control device provided in the lead wire winding device 100.

In step S1, the rotational drive device 10 is fastened to the pedestal 80 by the clamp 81. Next, in step S2, the distal end 30a of the sheath 30 of the lead wire 20 is held by the clip 53. In step S2, the position of the pedestal 80 can be adjusted by the slider 85 so that the lead wire 20 is in an extended state.

In step S3, the distance between the first arm 51a and the second arm 51b is adjusted by the first arm 51a and the second arm 51b of the rotating body 51, and the width and number of turns of the covering 30 are determined. Ru. In step S4, the height of the pedestal 80 is adjusted by the adjuster 83, and the relative value of the height between the distal end 30a of the covering 30 and the rotary drive device 10 is determined. In step S5, a constant tension is applied to the lead wire 20 by the balance device 87.

Note that steps S3 to S5 can be omitted depending on the structure of the lead wire winding device 100 or the type of electric motor 1 to be manufactured.

In step S6, the coating 30 of the lead wire 20 is wound by the rotation of the rotating body 51. Note that when the lead wire winding device 100 is provided with the slider 85, the covering 30 can be wound by moving the rotary drive device 10 in the direction of the distal end 30a of the covering 30. Furthermore, when the lead wire winding device 100 is provided with the balance device 87 or when the reciprocating table 85b of the slider 85 functions as a weight, the rotary drive device 10 is operated with a constant tension applied to the lead wire 20. The cover 30 can be wound by moving.

Thereafter, the electric motor 1 is removed from the lead wire winding device 100, and the manufacturing process of the electric motor 1 is completed. If there is another electric motor 1 to be manufactured, the steps S1 to S6 are repeated.

According to the method for manufacturing the electric motor 1 described above, it is possible to ensure the sameness of the shape of the lead wire 20 in the final product of the electric motor 1 in a simple manner, thereby automating the manufacturing of the electric motor 1 and reducing the work during packaging. Efficiency can be improved. Therefore, according to the lead wire winding device 100 of the second embodiment, it is possible to reduce the manufacturing cost of the electric motor 1 while suppressing a decrease in the production efficiency of the electric motor 1.

1 Electric motor, 3 Stator, 5 Rotor, 10 Rotation drive device, 10a Outer shell, 10a1 Inlet, 20 Lead wire, 22 Covered electric wire, 24 Connector, 24a First connector, 24b Second connector, 30 Sheath, 30a Distance proximal end, 30b proximal end, 32 cable tie, 34 straight part, 36 bent part, 50 rotating table, 51 rotating body, 51a first arm, 51b second arm, 53 clip, 55 base, 57 shaft, 80 pedestal, 81 clamp, 83 adjuster, 85 slider, 85a rail, 85b reciprocating table, 87 balance device, 100 lead wire winding device.

Claims (11)

a rotary drive device that converts electric power into rotational energy;
a lead wire connected to the rotary drive device and supplying the power to the rotary drive device;
The lead wire is
a plurality of covered electric wires including electric wires that supply the electric power to the rotational drive device;
It has a covering body that covers the plurality of covered electric wires and is wound and laminated in a spiral shape together with the plurality of covered electric wires ,
The covering body is
multiple straight sections;
a plurality of bent parts arranged alternately with the plurality of straight parts;
electric motors that are stacked in the same shape . A lead wire winding device for manufacturing the electric motor according to claim 1 , comprising:
a pedestal having a clamp for fastening the rotational drive device;
A lead comprising: a clip that grips the distal end of the sheath; and a rotating body on which the clip is arranged, and a rotary table that winds the sheath around the rotary body by rotation of the rotary body. Wire winding device. The rotating body is
It has a first arm on which the clip is arranged, and a second arm arranged apart from the first arm,
The rotating body is formed to be able to freely adjust the distance between the first arm and the second arm,
The rotating body is
The lead wire winding device according to claim 2 , wherein the width and number of turns of the covering body are determined by adjusting the distance between the first arm and the second arm. Claim 2 or 3 , further comprising an adjuster that supports the pedestal and adjusts the height of the pedestal to determine a relative height between the distal end of the covering and the rotary drive device. The lead wire winding device described in . 5. The method according to claim 2 , further comprising a slider that slidably supports the pedestal and moves the rotary drive device in the direction of the distal end of the covering to wind the covering around the rotating body. The lead wire winding device according to any one of the items. The lead wire winding according to claim 5 , further comprising a balance device connected to the pedestal and configured to move the rotary drive device in the direction of the distal end of the covering while applying a constant tension to the lead wire. rotation device. A method for manufacturing an electric motor according to claim 1 , comprising:
fastening the rotary drive device;
grasping the distal end of the covering;
A method for manufacturing an electric motor, comprising the step of winding the covering. 8. The method of manufacturing an electric motor according to claim 7 , further comprising the step of determining the width and number of turns of the covering. 9. The method of manufacturing an electric motor according to claim 7 , further comprising the step of determining a relative height between the position of the distal end of the covering and the rotary drive device. The step of winding the covering includes:
The method for manufacturing an electric motor according to any one of claims 7 to 9, wherein the method is carried out by moving the rotary drive device in the direction of the distal end of the covering. The step of winding the covering includes:
11. The method of manufacturing an electric motor according to claim 10 , wherein the rotary drive device is moved in the direction of the distal end of the covering while applying a constant tension to the lead wire.

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