Stator, method for manufacturing a stator, and motor

Abstract

To provide a stator capable of preventing an etching of an exposure part of a wire.SOLUTION: A stator 30 of the present disclosure includes: a stator iron core 31 that includes a back yoke part 31b and a plurality of teeth parts 31a; a metal connection terminal 411; a teeth insulation part 34; a protection agent housing part 36 that is filled with a protection agent; and a terminal housing part 35 that houses the connection terminal 411, and comprises: an insulator 32 fixed to the stator iron core 31, and a wire 10 where a metal core wire 10a is coated with an insulation coating film 10b. The connection terminal 411 includes: an electric bonding part 220 in which one of end parts 411f is projected from the terminal housing part 35, and the wire 10 is electrically connected to a wiring part 210 with the core wire 10a and the connection terminal 411 by heat; and a connection part 230 that connects the wiring part 210 with the electric bonding part 220. The connection part 230 includes an exposure part 330 having the core wire 10a exposed, and the exposure part 330 is housed in the protection agent housing part 36.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a stator, a method for manufacturing a stator, and a motor.

Background Art

[0002] In the stator of a motor, a wire is wound around each tooth portion of a stator core via an insulator covering the stator core. The wire is configured to cover a metal core wire with an insulating coating. Also, the wire is electrically connected to a metal connection terminal attached to the insulator, and the connection terminals are connected to each other using a connection board. As a method for electrically connecting the connection terminal attached to the insulator and the wire, a connection method using heat such as soldering or hot caulking is known.

[0003] When connecting the wire and the connection terminal by a connection method using heat, due to the influence of heat, an insulating coating is peeled off in a wide range outside the place where electrical connection is made, and a portion where the core wire of the wire is exposed is formed. Corrosion is likely to be formed on the exposed core wire of the wire, and the corrosion causes disconnection. Examples of the corrosion occurring on the core wire of the wire include galvanic corrosion caused by contact of dissimilar metals, or wet corrosion caused by contact of water with the metal. In order to suppress such corrosion, it is necessary to take measures against corrosion on the portion where the core wire of the wire is exposed.

[0004] In the invention described in Patent Document 1, a connection terminal provided on an insulator and a terminal wire with the core wire of the wire exposed are electrically connected by soldering, and a heat shrink tube is put on the outer peripheral portion of the solder layer to perform a heat addition process. By this process, it is possible to suppress the solder layer from coming into contact with oxygen. Therefore, the invention described in Patent Document 1 can prevent corrosion of the metal in the portion where the wire is electrically connected.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, the motor disclosed in Patent Document 1 had the problem that it could not adequately prevent corrosion in areas other than where electrical connections are made where the metal core wire is exposed (hereinafter referred to as the exposed portion).

[0007] This disclosure aims to provide a stator capable of preventing corrosion of exposed wires, a method for manufacturing a stator, and a motor. [Means for solving the problem]

[0008] The stator of this disclosure comprises a stator core having a back yoke portion and a plurality of teeth portions projecting radially inward from the back yoke portion at circumferential intervals, Columnar A connector made of metal, and a tooth insulating part that covers the tooth part. , contact A terminal storage section for housing the connecting terminals, A protective agent storage section is provided in the opening of the terminal storage section and is filled with a protective agent, It has an insulator fixed to the stator core and a wire made of metal with an insulating coating, and the connection terminal has one end Protective agent storage compartment The wire protrudes from the stator core and has a winding section wound around the stator core via an insulator, an electrical connection section where the core wire is exposed and the core wire and the connection terminal are electrically joined by heat, and a connecting section that connects the winding section and the electrical connection section. The connecting section has an exposed section where the core wire is exposed, and the exposed section is housed in a protective material storage section and covered with a protective material.

[0009] Furthermore, the method for manufacturing a stator according to this disclosure comprises a stator core having a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals, Columnar A connector made of metal, and a tooth insulating part that covers the tooth part. , contact A terminal storage section for housing the connecting terminals, A protective agent storage section is provided in the opening of the terminal storage section and is filled with a protective agent,A method for manufacturing a stator comprising an insulator fixed to a stator core and a wire having a metal core covered with an insulating coating, comprising: a first step of press-fitting a connection terminal into a terminal housing; an electrical joint for electrically joining the core wire and the connection terminal; a second step of forming an exposed portion where the core wire is exposed; and a third step of housing the exposed portion in a protective material housing. and the end of the connection terminal protrudes from the protective housing portion to the extent that The device comprises a third step of press-fitting the connection terminal deeper into the terminal housing than in the first step, and a fourth step of filling the protective agent housing with protective agent.

[0010] Furthermore, the motor of this disclosure has a stator core having a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals, and provided on the stator core, A connecting terminal made of columnar metal, The tooth insulating part that covers the tooth part and , terminals that house the connection terminals Child storage compartment, A protective agent storage section is provided in the opening of the terminal storage section and is filled with a protective agent, An insulator having a metal core wire covered with an insulating coating ,of The connection terminal has one end Protective agent storage compartment The stator has a winding portion that protrudes from the stator and is wound around the stator core via an insulator, an electrical joint portion that electrically connects the winding portion and a connection terminal and has an exposed core wire after the insulating coating has been removed, and a connecting portion that connects the winding portion and the joint portion and has an exposed core wire after the insulating coating has been removed, wherein the exposed portion of the connecting portion is housed in a protective material storage portion; a rotor having a rotor core rotatably provided on the inner circumference side of the stator and a rotating shaft fixed to the central hole of the rotor core. [Effects of the Invention]

[0011] The stator, method for manufacturing the stator, and motor of this disclosure can prevent corrosion in the exposed portion of the wire. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view of the motor according to Embodiment 1. [Figure 2]It is a cross-sectional view showing only one side of the A-A cross-section of the motor according to Embodiment 1. [Figure 3] It is a perspective view of the stator according to Embodiment 1. [Figure 4] It is a cross-sectional view of the wire according to Embodiment 1. [Figure 5] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator according to Embodiment 1. [Figure 6] It is a flowchart showing the manufacturing method of the stator according to Embodiment 1. [Figure 7] It is a flowchart showing the electrical connection process of the stator according to Embodiment 1. [Figure 8] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator after the completion of step S101 in the manufacturing method of the stator according to Embodiment 1. [Figure 9] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator after the completion of step S111 in the electrical connection process of the stator according to Embodiment 1. [Figure 10] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator after the completion of step S102 in the manufacturing method of the stator according to Embodiment 1. [Figure 11] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator after the completion of step S103 in the manufacturing method of the stator according to Embodiment 1. [Figure 12] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator after the completion of step S104 in the manufacturing method of the stator according to Embodiment 1. [Figure 13] It is a partially enlarged view showing the vicinity of the insulator on the anti-load side of the stator according to Embodiment 2. [Figure 14] It is a partially enlarged view showing the vicinity of the electrical joint of the stator according to Embodiment 2. [Figure 15] It is a flowchart showing the electrical connection process of the stator according to Embodiment 2. [Figure 16]This is a partially enlarged view showing the area near the insulator on the non-load side of the stator after step S101 is completed in the stator manufacturing method according to Embodiment 2. [Figure 17] This is a partially enlarged view showing the connection terminals of the stator after step S101 is completed in the stator manufacturing method according to Embodiment 2. [Figure 18] This is a partially enlarged view showing the connection terminals of the stator after step S211 is completed in the electrical connection process of the stator according to Embodiment 2. [Figure 19] This is a partially enlarged view showing the area near the insulator on the non-load side of the stator after step S102 is completed in the stator manufacturing method according to Embodiment 2. [Figure 20] This is a partially enlarged view showing the connection terminals of the stator after step S102 is completed in the stator manufacturing method according to Embodiment 2. [Figure 21] This is a partially enlarged view showing the area near the insulator on the non-load side of the stator after step S103 is completed in the stator manufacturing method according to Embodiment 2. [Figure 22] This is a flowchart illustrating the electrical connection process of the stator according to Embodiment 3. [Figure 23] This is a partially enlarged view showing the connection terminals of the stator after the completion of step S312 in the electrical connection process of the stator according to Embodiment 3. [Figure 24] This is a partially enlarged view showing the connection terminals of the stator after the completion of step S313 in the electrical connection process of the stator according to Embodiment 3. [Modes for carrying out the invention]

[0013] A motor according to Embodiment 1 of this disclosure will be described with reference to the drawings. This disclosure is not limited to the following embodiments, and modifications or omissions may be made without departing from the spirit of this disclosure. Furthermore, common elements in each figure are denoted by the same reference numerals, and redundant explanations are omitted.

[0014] Embodiment 1. Figure 1 is a perspective view of the motor according to Embodiment 1. Figure 2 is a view showing only one side of the A-A cross-sectional view of the motor according to Embodiment 1 in Figure 1. Figure 3 is a perspective view of the stator according to Embodiment 1. The overall configuration of Embodiment 1 will be explained using Figures 1 to 3. Note that since the internal structure of the motor 100 is symmetrical, the cross-sectional view of the right side of the motor 100 is omitted in Figure 2 for clarity of explanation.

[0015] The motor 100 comprises a frame 7 that forms the outer casing of the motor, a cover 14, a rotor 20, bearings 5a and 5b, a stator 30, and a terminal block 700. The motor 100 also has a cylindrical rotor 20 and a stator 30 inside the outer casing formed by the frame 7 and the cover 14.

[0016] Motor 100 is an internal rotation type motor in which the rotor 20 rotates inside the stator 30. The rotor 20 rotates with its outer surface facing the inner surface of the stator 30. The rotor 20 is a squirrel-cage rotor. The rotor 20 comprises a rotor core 21 and a rotating shaft 22. The rotating shaft 22 is press-fitted into the rotor core 21. The rotating shaft 22 is also supported by a pair of bearings 5a and 5b on both sides in the axial direction with respect to the rotor core 21.

[0017] Furthermore, one end 22a of the rotating shaft 22 protrudes outside the frame 7. A load (not shown) is connected to the end 22a of the rotating shaft 22 that protrudes outside the frame 7. Hereafter, in the direction along the axial direction of the rotating shaft 22, the side in which the rotating shaft 22 protrudes outside the frame 7, i.e., the lower side in Figure 2, will be referred to as the load side. The other side in which the rotating shaft 22 does not protrude outside the frame 7, i.e., the upper side in Figure 2, will be referred to as the non-load side.

[0018] The stator 30 is the part that generates the magnetic force to rotate the rotor 20. As shown in Figure 2, the stator 30 has a cylindrical shape and comprises a plurality of stator cores 31, insulators 32, wires 10, and connection terminals 411.

[0019] The stator core 31 is constructed by stacking multiple arc-shaped punched electromagnetic steel sheets in the direction of the rotation axis. The stator core 31 includes an arc-shaped back yoke portion 31b and teeth portions 31a that project radially inward from the back yoke portion 31b at a distance from it. Multiple stator cores 31 are arranged in a ring shape. In addition, a slot space (not shown) is formed between two adjacent teeth portions 31a, which is a space in which the winding portion 210 of the wire 10 is housed.

[0020] The insulators 32 are made of insulating material and are attached to the stator core 31. The insulators 32 also include a teeth insulating section 34, a terminal housing section 35, and a protective agent housing section 36.

[0021] The tooth insulation portion 34 covers the tooth portion 31a. The tooth insulation portion 34 is located between the tooth portion 31a and the winding portion 210, and insulates the tooth portion 31a from the winding portion 210.

[0022] The terminal storage section 35 is an insertion hole for housing the connection terminal 411. The protective agent storage section 36 is a concave groove provided in the insulator 32, into which the protective agent 37 is filled. The protective agent storage section 36 is located above the terminal storage section 35, i.e., on the non-load side.

[0023] Figure 4 is a cross-sectional view of the wire according to Embodiment 1. Figure 5 is a partially enlarged view of Figure 2. The configuration around the connection terminal 411 will be explained in more detail using Figures 4 and 5. The connection terminal 411 is a prismatic terminal made of mild steel wire with copper plating. As shown in Figure 4, the wire 10 has an aluminum core wire 10a with an insulating coating 10b covering the outer circumference. The insulating coating 10b is made of, for example, a polyester-based or urethane-based material. The wire 10 also has a winding portion 210, an electrical junction portion 220, and a connection portion 230.

[0024] The winding section 210 is wound around the stator core 31 via the insulator 32. The electrical joint 220 electrically connects the core wire 10a of the wire 10 to the connection terminal 411 by heat. The electrical joint 220 is formed by winding the wire 10 around any point in the axial direction of the connection terminal 411. In Embodiment 1, the electrical connection method is DIP soldering. The electrical joint 220 is soldered with the insulating coating 10b removed by heat, exposing the core wire 10a. The connection section 230 connects the winding section 210 to the electrical joint 220. The winding section 210 and the connection terminal 411 are electrically connected by the connection section 230.

[0025] In the process of forming the connection portion 230 of the wire 10, the insulating coating 10b is peeled off, and an exposed portion 330 is formed in which the core wire 10a is exposed. The reason for the formation of the exposed portion 330 is described below. When manufacturing the stator 30, if the core wire 10a of the wire 10 and the connection terminal 411 are electrically connected by a thermal connection method, the insulating coating 10b other than the connection point is also peeled off. For example, in Embodiment 1, a DIP soldering method is used for the electrical joint portion 220.

[0026] In addition, in Embodiment 1, aluminum is used for the core wire 10a of the wire 10. Aluminum is inexpensive and lighter than copper, with a specific gravity about one-third that of copper, thus enabling cost reduction and weight reduction of the stator 30. However, since aluminum is a dissimilar metal to the connection terminal 411 and has a greater ionization tendency than copper and mild steel, which are components of the connection terminal 411, the exposed portion 330 may undergo galvanic corrosion. Furthermore, if the exposed portion 330 is not protected, it will be constantly exposed to oxygen, and if water enters the motor 100 and comes into contact with the exposed portion 330, it will cause wet corrosion. As corrosion of the exposed portion 330 progresses, there is a possibility of wire breakage, so it is necessary to protect the exposed portion 330 with a protective agent 37.

[0027] The exposed portion 330 is housed in a protective agent storage portion 36. The protective agent storage portion 36 is a concave groove provided on the upper part of the insulator 32, i.e., on the non-load side, and the protective agent 37 is filled into the groove. The protective agent 37 is made of an insulating material. The protective agent 37 is, for example, silicone resin. This is because silicone has excellent heat resistance and insulating properties.

[0028] The connection terminal 411 is located on the upper surface of the insulator 32, i.e., on the non-load side of the insulator 32. The load-side end 411g of the connection terminal 411 is press-fitted into the terminal housing 35. The length 411c of the connection terminal 411 is longer than the sum of the length 411b of the connection terminal 411 that is press-fitted into the terminal housing 35 and the depth 36a of the protective material housing 36. Therefore, the non-load-side end 411f of the connection terminal 411 protrudes from both the terminal housing 35 and the protective material housing 36. The non-load-side end 411f of the connection terminal 411 that protrudes from the terminal housing 35 can be electrically connected to other components. The non-load-side end 411f of the connection terminal 411 is, for example, directly soldered to a power supply line 900. The power supply line 900 is a lead wire and is connected to a power supply.

[0029] The terminal block 700 is made of resin, which is an insulating material. The terminal block 700 is equipped with a terminal plate 800. The terminal plate 800 is electrically connected to the wire 10 by connecting it to the non-load side end of the connection terminal 411.

[0030] Figure 6 is a flowchart illustrating the method for manufacturing a stator according to Embodiment 1. Figure 7 shows the electrical connection process according to Embodiment 1, and more specifically, it is a flowchart that explains step S102 in Figure 6 in detail. Figures 8 to 12 are enlarged views showing parts of the stator corresponding to the steps in Figure 6 or Figure 7. More specifically, Figure 8 shows a part of the stator after step S101, Figure 9 after step S111, Figure 10 after step S102, Figure 11 after step S103, and Figure 12 after step S104. The method for manufacturing a stator will be explained using Figures 6 to 12.

[0031] Step S101 is performed after the insulator 32, wire 10, and connection terminal 411 have been manufactured. In step S101, the connection terminal 411 is press-fitted into the terminal housing 35. As shown in Figure 8, the length 411a of the connection terminal 411 press-fitted into the terminal housing 35 in step S101 is shorter than the length 35a of the terminal housing 35. Step S101 is completed when the connection terminal 411 is press-fitted into the terminal housing 35 as shown in Figure 8.

[0032] Step S102 is performed after the processing in step S101. In step S102, the core wire 10a of the wire 10 is electrically connected to the connection terminal 411. More specifically, the processing in step S102 is performed in accordance with the processing in steps S111 to S113, as shown in Figure 7. The processing in steps S111 to S113 will be explained separately.

[0033] Step S111 is performed after the processing in step S101. In step S111, a portion corresponding to the electrical junction 220 is formed. More specifically, in Embodiment 1, a portion corresponding to the electrical junction 220 is formed by wrapping the wire 10 around any number of times at any location in the axial direction of the connection terminal 411. Also in step S111, a connection portion 230 is formed, which is the portion that connects the portion corresponding to the electrical junction 220 to the winding portion 210. Step S111 is completed when the portion corresponding to the electrical junction 220 is formed, as shown in Figure 9.

[0034] Step S112 is performed after the processing in step S111. In step S112, flux is applied to the area corresponding to the electrical junction 220 formed in step S111. The flux is applied to remove the oxide film generated during soldering and to remove harmful substances. The flux also contains fluoride. Flux containing fluoride is easy to use because it is highly reactive and does not require rinsing with water after soldering. Step S112 is completed when the application of flux to the area corresponding to the electrical junction 220 is finished.

[0035] Step S113 is performed after the processing in step S112. In step S113, an electrical connection is made to the area corresponding to the electrical junction 220 to which flux was applied in step S112. In Embodiment 1, the electrical connection method performed in step S113 is DIP soldering. As shown in Figure 10, in step S113, an electrical connection is made to the area corresponding to the electrical junction 220, and once the electrical junction 220 is formed, the process is completed. When the processing in step S113 is completed, the processing in step S102 is completed. In addition, the processing in step S113 creates an exposed portion 330 on the connection portion 230.

[0036] Step S103 is performed after the processing in step S102, more specifically after the completion of step S113. In step S103, the connector terminal 411 is pressed deeper into the terminal housing 35 until the exposed portion 330 created in step 113 is housed in the protective material housing 36. That is, as shown in Figure 11, the length 411b of the connector terminal 411 pressed into the terminal housing 35 in step S103 is longer than the length 411a of the connector terminal 411 pressed into the terminal housing 35 in step S101. Step S103 is completed when the connector terminal 411 is pressed deeper into the terminal housing 35 until the exposed portion 330 is housed in the protective material housing 36.

[0037] Step S104 is performed after the processing in step S103. In step S104, the protective agent 37 is filled into the protective agent storage section 36. As shown in Figure 12, step S104 is completed when the protective agent 37 is filled into the protective agent storage section 36.

[0038] As described above, the stator 30 according to Embodiment 1 has a stator core 31 having a back yoke portion 31b and a plurality of tooth portions 31a that protrude radially inward from the back yoke portion 31b at circumferential intervals, a connection terminal 411 made of metal, a tooth insulating portion 34 that covers the tooth portions 31a, a protective agent storage portion 36 that is filled with a protective agent 37, and a terminal storage portion 35 that houses the connection terminal 411, an insulator 32 fixed to the stator core 31, and a core wire 10a made of metal covered with an insulating coating 10b The device comprises a wire 10 and a connection terminal 411, with one end 411f protruding from the terminal housing 35. The wire 10 has a winding portion 210 wound around the stator core 31 via an insulator 32, an electrical joint portion 220 in which the core wire 10a is exposed and the core wire 10a is electrically joined to the connection terminal 411 by heat, and a connection portion 230 connecting the winding portion 210 and the electrical joint portion 220. The connection portion 230 has an exposed portion 330 in which the core wire 10a is exposed, and the exposed portion 330 is housed in a protective agent housing 36 and covered with a protective agent 37. This configuration prevents corrosion of the exposed portion of the wire.

[0039] Furthermore, the stator 30 according to Embodiment 1 includes an additional component: the protective agent 37 contains silicone. Therefore, this configuration makes it possible to prevent corrosion of the exposed portion even when the exposed portion becomes extremely hot.

[0040] Furthermore, in the stator 30 according to Embodiment 1, as an additional configuration, the metal contained in the core wire 10a of the wire 10 and the metal contained in the connector terminal 411 are of different types. This configuration has the effect of allowing appropriate materials to be selected for the wire core and the connector terminal, respectively, depending on the application. Also, if the metal contained in the wire core and the metal contained in the connector terminal are of different types, galvanic corrosion may occur, increasing the need to prevent corrosion of exposed parts. Note that "different types of metal" also includes cases where some types of metal constituting the wire and the connector terminal are common. This is because even if some types of metal are common, galvanic corrosion will occur if dissimilar metals are included. For example, even if the wire is a copper-clad aluminum wire with an aluminum alloy core covered in copper, and the connector terminal contains copper, galvanic corrosion will still occur in the wire.

[0041] Furthermore, as an additional configuration, the stator 30 according to Embodiment 1 includes a core wire 10a of the wire 10 containing a metal with a greater ionization tendency than the connection terminal 411.

[0042] Furthermore, the stator 30 according to Embodiment 1 has an additional configuration in which the core wire 10a of the wire 10 contains aluminum. This configuration has the effect of reducing costs and making the stator lighter.

[0043] Furthermore, in the stator 30 according to Embodiment 1, the connection terminal 411 has a columnar shape as an additional configuration. This shape has the effect of making the connection terminal simple in shape and allowing for electrical connection with other components.

[0044] Furthermore, the stator 30 according to Embodiment 1 has an additional feature: the protective agent storage section 36 is concave. This shape has the effect of allowing the protective agent to be filled into the protective agent storage section without adding any new parts.

[0045] Furthermore, the stator 30 according to Embodiment 1 has an additional configuration in which a wire 10 wound around the connection terminal 411 is soldered. This configuration prevents disconnection of the electrical connection.

[0046] Furthermore, the manufacturing method of the stator 30 according to Embodiment 1 includes a stator core 31 having a back yoke portion 31b and a plurality of tooth portions 31a that protrude radially inward from the back yoke portion 31b at circumferential intervals, a connection terminal 411 made of metal, a tooth insulating portion 34 that covers the tooth portions 31a, a protective agent storage portion 36 for filling with a protective agent 37, and a terminal storage portion 35 for housing the connection terminal 411, and an insulator 32 fixed to the stator core 31, and a core wire 10a made of metal covered with an insulating coating 10b. A method for manufacturing a stator 30 comprising a wire 10, comprising: a first step of press-fitting a connection terminal 411 into a terminal housing 35; an electrical joint 220 for electrically joining the core wire 10a and the connection terminal 411, and a second step of forming an exposed portion 330 in which the core wire 10a is exposed; a third step of press-fitting the connection terminal 411 into the terminal housing 35 deeper than in the first step until the exposed portion 330 is housed in the protective agent housing 36; and a fourth step of filling the protective agent housing 36 with a protective agent 37. This configuration makes it possible to prevent corrosion of the exposed portion of the wire.

[0047] Furthermore, the motor 100 according to Embodiment 1 comprises a stator core 31 having a back yoke portion 31b and a plurality of tooth portions 31a that protrude radially inward from the back yoke portion 31b at circumferential intervals, a connection terminal 411 made of metal, a tooth insulating portion 34 that covers the tooth portions 31a, a protective agent storage portion 36 for filling with a protective agent 37, and a terminal storage portion 35 for housing the connection terminal 411, an insulator 32 fixed to the stator core 31, and a wire 10 in which a metal core wire 10a is covered with an insulating coating 10b, and one end of the connection terminal 411 is in the terminal storage portion 35 Protruding from the stator, the wire 10 has a winding portion 210 wound around the stator core 31 via an insulator 32, an electrical joint portion 220 in which the core wire 10a is exposed and the core wire 10a is electrically joined to the connection terminal 411 by heat, and a connecting portion 230 that connects the winding portion 210 and the electrical joint portion 220. The connecting portion 230 has an exposed portion 330 in which the core wire 10a is exposed, and the exposed portion 330 has a stator 30 housed in a protective agent storage portion 36 and covered with a protective agent 37, a rotor core 21 rotatably provided on the inner circumference side of the stator 30, and a rotating shaft 22 that is press-fitted into the central hole of the rotor core 21. This configuration makes it possible to prevent corrosion of the exposed portion of the wire.

[0048] In the first embodiment, the stator protective agent is a flux containing fluoride, but it is not limited to this. For example, a flux containing chloride may be used.

[0049] Furthermore, although the protective agent is filled into the entire protective agent storage section of the stator according to Embodiment 1, the amount of protective agent to be filled only needs to be enough to fill the exposed portion.

[0050] Furthermore, while the wire core in Embodiment 1 is aluminum, it is not limited to aluminum. The wire core can be made of any metal. For example, the wire core may be made of copper.

[0051] Furthermore, while a portion of the electrical joint according to Embodiment 1 is press-fitted into the protective agent storage portion, it is not limited to this configuration. For example, the entire electrical joint may be press-fitted into the protective agent storage portion. Such a configuration can also suppress corrosion at the electrical joint.

[0052] Furthermore, the winding method for the winding section may be either concentrated winding or distributed winding.

[0053] Furthermore, while the connection terminal in Embodiment 1 is made of mild steel wire with copper plating, it is not limited to this. For example, the connection terminal may be made of aluminum with a nickel undercoat and then tin-plated. By using such a configuration, the corrosion resistance of the connection terminal can be improved.

[0054] Furthermore, although the connection terminal according to Embodiment 1 is prism-shaped, it is not limited to this, and any columnar shape is acceptable. For example, it may be cylindrical or triangular prism-shaped.

[0055] Furthermore, in the stator insulator according to Embodiment 1, the protective agent storage section was provided on the non-load side relative to the terminal storage section, but this is not limited to this. The protective agent storage section may be located between the non-load side end of the insulator and the end of the terminal storage section. For example, the protective agent storage section may be provided in the middle of the terminal storage section.

[0056] Embodiment 2. Embodiment 2 will now be described. Compared to Embodiment 1, the motor 200 in Embodiment 2 differs in the structure of the connection terminal 511 on the stator 50, the structure of the electrical connection portion 420 of the wire 70, and the method of electrical connection of the electrical connection portion 420. The structure of the motor 200 in Embodiment 2, excluding the structure of the connection terminal 511 and the structure of the wire 70, is the same as in Embodiment 1, so its description will be omitted.

[0057] Figure 13 is a partially enlarged view of the stator 50 according to Embodiment 2. Figure 14 is a partially enlarged view of Figure 13, and in particular shows the structure of the electrical junction 420. The configuration around the connection terminal 511 will be explained using Figures 13 and 14. The wire 70, as in Embodiment 1, has an insulating coating 70b on the outer circumference of a core wire 70a with aluminum as the main body. The wire 70 also has a winding portion 410, an electrical junction 420, and a connection portion 430, as in Embodiment 1.

[0058] The winding section 410 is wound around the stator core 31 via the insulator 32. The electrical joint 420 electrically connects the core wire 70a of the wire 70 to the connection terminal 511. In Embodiment 2, the electrical connection method is soldering using a soldering iron. In Embodiment 2, compared to Embodiment 1, in which the wire is wound around the terminal, the portion corresponding to the electrical joint 420 can be formed more easily. The electrical joint 420 is the wire 70 sandwiched between the column portion 511r and the clamping portion 511h of the connection terminal 511. Furthermore, the electrical joint 420 is soldered with the insulating coating 70b removed, exposing the core wire 70a. The connection portion 430 connects the winding section 410 and the electrical joint 420.

[0059] At the connection portion 430 of the wire 70, the insulating coating 70b is peeled off, and an exposed portion 530 is formed where the core wire 70a is exposed. This is because soldering with a soldering iron is a method of electrically connecting the core wire 70a of the wire 70 and the connection terminal 511 by heat, and as explained in Embodiment 1, the insulating coating 70b other than the electrical joint portion 420 is also peeled off. Furthermore, the exposed portion 530 is press-fitted into the protective agent storage portion 36.

[0060] The connection terminal 511 is provided on the non-load side of the insulator 32, similar to the first embodiment. The connection terminal 511 consists of a column portion 511r and a clamping portion 511h. The connection terminal 511 is made of, for example, a copper plate that has been tin-plated.

[0061] The column portion 511r has its load-side end 511g press-fitted into the terminal housing portion 35. The column portion 511r is rectangular in shape. The length 511c of the column portion 511r is longer than the sum of the length 511b of the column portion 511r that is press-fitted into the terminal housing portion 35 and the depth 36a of the protective agent housing portion 36. Therefore, the non-load-side end 511f of the column portion 511r protrudes from both the terminal housing portion 35 and the protective agent housing portion 36. The non-load-side end 511f of the column portion 511r that protrudes from the terminal housing portion 35 can be electrically connected to other components.

[0062] The clamping portion 511h is provided between the non-load side end 511f and the load side end 511g of the column portion 511r. The clamping portion 511h fixes the electrical joint portion 420 by clamping it. Since the connection terminal 511 is made of a single component, the clamping portion 511h and the column portion 511r are the same component. The clamping portion 511h is formed by folding the portion corresponding to the clamping portion 511h back toward the non-load side end 511f of the connection terminal 511.

[0063] Figure 15 is a flowchart illustrating the electrical connection process according to Embodiment 2. The method for manufacturing the stator in Embodiment 2 is the same as that of Embodiment 1 shown in Figure 6. Figure 15 is a flowchart illustrating step S102 in Figure 6 in detail. Figures 16 to 21 are enlarged views showing parts of the stator corresponding to the steps in Figure 6 or Figure 15. More specifically, Figures 16 and 17 show parts of the stator 50 after step S101, Figure 18 after step S211, Figures 19 and 20 after step S102, and Figure 21 after step S103. The method for manufacturing the stator 50 will be explained using Figures 6 and 16 to 21.

[0064] Step S101 is performed after the insulator 32, wire 70, and connection terminal 511 have been manufactured. In step S101, the connection terminal 511 is press-fitted into the terminal housing 35. As shown in Figure 16, the length 511a of the connection terminal 511 press-fitted into the terminal housing 35 in step S101 is shorter than the length 35a of the terminal housing 35. Figure 17 is a partially enlarged view of Figure 16, showing the connection terminal 511 and wire 70. Step S101 is completed when the connection terminal 511 is press-fitted into the terminal housing 35.

[0065] Step S102 is performed after the processing in step S101. In step S102, the core wire 70a of the wire 70 is electrically connected to the connection terminal 511. More specifically, the processing in step S102 is performed in accordance with the processing in steps S211 to S213, as shown in Figure 16. The processing in steps S211 to S213 will be explained separately.

[0066] Step S211 is performed after the processing in step S101. At the end of the processing in step S101, as shown in Figure 17, the connection terminal has a column portion 511r and a portion corresponding to the clamping portion 511h. In step S211, the clamping portion 511h is formed. More specifically, the wire 70 is placed on the portion corresponding to the clamping portion 511h, and the portion corresponding to the clamping portion 511h is bent towards the non-load side end 511f of the column portion 511r. Through this processing, the clamping portion 511h can clamp and fix the wire 70. As shown in Figure 18, the processing in step S211 is completed when the clamping portion 511h is formed. Also, the portion of the wire 70 that is clamped in the clamping portion 511h by the processing in step S211 corresponds to the electrical joint portion 420.

[0067] Step S212 is performed after the processing in step S211. In step S212, flux is applied to the area corresponding to the electrical junction 420 formed in step S211. The flux applied in step S212 is the same as in Embodiment 1, so its description is omitted. Step S212 is completed when the application of flux to the area corresponding to the electrical junction 420 is finished.

[0068] Step S213 is performed after the processing in step S212. In step S213, an electrical connection is made at the location corresponding to the electrical joint 420 to which flux was applied in step S212. In Embodiment 2, the electrical connection method performed in step S213 is soldering with a soldering iron. As shown in Figure 19, step S213 is completed when an electrical connection is made to the location corresponding to the electrical joint 420 and the electrical joint 420 is formed. Figure 20 is a partially enlarged view of Figure 19 and shows the connection terminal 511 and wire 70. When step S213 is completed, an exposed portion 530 is created at the connection.

[0069] Step S103 is performed after the processing in step 102. In step S103, the connecting terminal 511 is pressed deeper into the terminal housing 35 until the exposed portion 530 created in step 213 is housed in the protective agent housing 36. That is, as shown in Figure 21, the length 511b of the connecting terminal 511 pressed into the terminal housing 35 in step S103 is longer than the length 511a of the connecting terminal 511 pressed into the terminal housing 35 in step S101. Step S103 is completed when the connecting terminal 511 is pressed deeper into the terminal housing 35 until the exposed portion 530 is housed in the protective agent housing 36.

[0070] Step S104 is performed after the processing in step S103. In step S104, the protective agent 37 is filled into the protective agent storage section 36. Step S104 is completed when the protective agent 37 has been filled into the protective agent storage section 36.

[0071] As described above, the stator 50 according to Embodiment 2 has a stator core 31 having a back yoke portion 31b and a plurality of tooth portions 31a that protrude radially inward from the back yoke portion 31b at circumferential intervals, a connection terminal 511 made of metal, a tooth insulating portion 34 that covers the tooth portions 31a, a protective agent storage portion 36 that is filled with a protective agent 37, and a terminal storage portion 35 that houses the connection terminal 511, an insulator 32 fixed to the stator core 31, and a core wire 70a made of metal covered with an insulating coating 70b The stator 50 comprises a wire 70, and the connecting terminal 511 has one end 511f protruding from the terminal housing 35. The wire 70 has a winding portion 410 that is wound around the stator core 31 via an insulator 32, an electrical joint portion 420 in which the core wire 70a is exposed and the core wire 70a and the connecting terminal 511 are electrically joined by heat, and a connecting portion 430 that connects the winding portion 410 and the electrical joint portion 420. The connecting portion 430 has an exposed portion 530 in which the core wire 70a is exposed, and the exposed portion 530 is housed in a protective agent housing 36 and covered with a protective agent 37. With this configuration, the stator 50 according to Embodiment 2 has the same effects as those described in Embodiment 1.

[0072] Furthermore, the stator 50 according to Embodiment 2 has an additional configuration in which the connection terminal 511 has a columnar column portion 511r and a clamping portion 511h that sandwiches the wire 70 between the column portion and the clamping portion 511h, and the electrical joint portion 420 is soldered to the wire 70 sandwiched between the column portion 511r and the clamping portion 511h. With this configuration, the portion corresponding to the electrical joint portion 420 can be formed more easily compared to Embodiment 1 in which the wire is wrapped around the connection terminal.

[0073] Furthermore, the additional configurations of the stator 50 according to Embodiment 2 may be added to the stator of Embodiment 1.

[0074] Furthermore, although the stator connection terminal in Embodiment 2 was composed of a single component, it is not limited to this. The clamping portion and the column portion may be composed of different components, and the components may be connected by welding. With such a configuration, even if the column portion is made of a metal that is difficult to bend, the clamping portion can be made of a metal that is easy to bend, thus simplifying the manufacturing of the stator.

[0075] Furthermore, although the column portion of the connection terminal according to Embodiment 2 is a rectangular prism shape, it is not limited to this, and any columnar shape is acceptable. For example, it may be cylindrical or triangular prism shape.

[0076] Embodiment 3. Embodiment 3 will now be described. In Embodiment 3, the motor 300 differs from Embodiment 2 in the method of electrical connection of the electrical junction 620 of the wire 80. The manufacturing method of the stator 60 and the structure of the motor 300, excluding the method of electrical connection of the electrical junction 620 according to Embodiment 3, are the same as in Embodiment 2, so their description will be omitted. Also, as in Embodiments 1 and 2, the wire 80 has an aluminum core wire 80a with an insulating coating 80b covering the outer circumference.

[0077] In Embodiment 3, the electrical connection method for the electrical joint 620 is fusing. Fusing is a method of heat crimping by resistance welding without removing the insulating coating 80b of the wire 80 beforehand with a solvent or the like. In other words, in Embodiment 3, the electrical joint 620 is heated and pressure-welded between the core wire 80a of the wire 80 and the connection terminal 611 by resistance heating and pressure generated at the electrodes. However, since fusing is a method of electrically connecting the core wire 80a of the wire 80 and the connection terminal 611 by heat, as explained in Embodiment 1, the insulating coating 80b other than that of the electrical joint 620 will also be peeled off.

[0078] Figure 22 is a flowchart illustrating the electrical connection process according to Embodiment 3. The manufacturing method of the stator 60 in Embodiment 3 is the same as that of Embodiments 1 and 2 shown in Figure 6. Figure 22 is a flowchart illustrating step S102 in Figure 6 in detail. Figures 23 and 24 are enlarged views showing a part of the stator corresponding to the step in Figure 22. More specifically, Figure 23 shows a part of the stator after the completion of step S312, and Figure 24 shows a part of the stator after the completion of step S313. The method of electrical connection of the stator will be explained using Figures 22 to 24.

[0079] Step S311 is performed after the processing in step S101. At the end of the processing in step S101, the connection terminal 611 has a column portion 611r and a portion corresponding to the clamping portion 611h, similar to step S211. The processing in step S311 is the same as in step S211, so the explanation is omitted. Step S311 is completed when the clamping portion 611h is formed. The portion of the wire that is clamped in the clamping portion 611h by the processing in step S311 corresponds to the electrical joint portion 620.

[0080] Step S312 is performed after the processing in step S311. In step S312, as shown in Figure 23, the main electrode 90 is attached to the clamping portion 611h and the auxiliary electrode 91 is attached to the column portion 611r. Step S312 is completed when the attachment of the main electrode 90 and the auxiliary electrode 91 is finished.

[0081] Step S313 is performed after the processing in step S312. In step S313, current is passed while pressure is applied between the main electrode 90 and the sub-electrode 91 that were attached in step S312. The insulating coating 80b of the wire 80 is stripped off by the current. The electrical junction 620 of the wire 80 and the connection terminal 611 are heated and pressure-welded by the resistive heating and pressurization generated at the main electrode 90. Step S313 is completed when the electrical junction 620 makes an electrical connection, as shown in Figure 24. Also, when step S313 is completed, an exposed portion 730 is created at the connection portion 640.

[0082] As described above, the stator 60 according to Embodiment 3 has a stator core 31 having a back yoke portion 31b and a plurality of tooth portions 31a that protrude radially inward from the back yoke portion 31b at circumferential intervals, a connection terminal 611 made of metal, a tooth insulating portion 34 that covers the tooth portions 31a, a protective agent storage portion 36 that is filled with a protective agent 37, and a terminal storage portion 35 that houses the connection terminal 611, an insulator 32 fixed to the stator core 31, and a core wire 80a made of metal covered with an insulating coating 80b The stator 60 comprises a wire 80 and a connection terminal 611, with one end protruding from the terminal housing 35. The wire 80 has a winding portion 610 wound around the stator core 31 via an insulator 32, an electrical junction portion 620 in which the core wire 80a is exposed and the core wire 80a is electrically joined to the connection terminal 611 by heat, and a connection portion 640 connecting the winding portion 610 and the electrical junction portion 620. The connection portion 640 has an exposed portion 730 in which the core wire 80a is exposed, and the exposed portion 730 is housed in a protective agent housing 36 and covered with a protective agent 37. With this configuration, the stator 60 according to Embodiment 3 achieves the same effects as those described in Embodiment 1.

[0083] Furthermore, the stator 60 according to Embodiment 3 has an additional configuration in which the connection terminal 611 has a columnar column portion 611r and a clamping portion 611h that sandwiches the wire 80 between the column portion 611r, and the electrical joint portion 620 has the connection terminal 611 and the core wire 80a heat-crimped. With this configuration, since heat crimping is an electrical connection method that does not use solvents, it has the effect of having a low environmental impact during manufacturing.

[0084] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0085] The various forms of this disclosure are summarized below as an appendix.

[0086] (Note 1) A stator core having a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals, A connector made of metal, An insulator fixed to the stator core, having a tooth insulating portion that covers the tooth portion, a protective agent storage portion for filling with a protective agent, and a terminal storage portion for housing the connection terminal, A wire consisting of a metal core covered with an insulating coating, Equipped with, The aforementioned connection terminal has one end protruding from the terminal housing portion. The wire has a winding portion wound around the stator core via the insulator, an electrical connection portion where the core wire is exposed and the core wire and the connection terminal are electrically joined by heat, and a connection portion connecting the winding portion and the electrical connection portion. The aforementioned connection portion has an exposed portion in which the core wire is exposed. The exposed portion is a stator housed in the protective agent storage portion and covered by the protective agent. (Note 2) The aforementioned protective agent contains silicone The stator as described in Appendix 1. (Note 3) The metal contained in the core of the aforementioned wire and the metal contained in the aforementioned connection terminal are of different types. The stator as described in Appendix 1 or Appendix 2. (Note 4) The core of the aforementioned wire contains a metal with a higher ionization tendency than the connection terminal. The stator as described in Appendix 3. (Note 5) The core wire of the aforementioned wire contains aluminum. A stator as described in any one of the appendices 1 to 4. (Note 6) The aforementioned connection terminal is columnar in shape. Stator as described in any one of the appendices 1 to 5 (Note 7) The protective agent storage section has a concave shape. A stator as described in any one of the appendices 1 to 6. (Note 8) The aforementioned electrical junction is formed by soldering a wire that has been wound around the connection terminal. A stator as described in any one of the appendices 1 to 7. (Note 9) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by soldering a wire sandwiched between the column portion and the clamping portion. A stator as described in any one of the appendices 1 to 5. (Note 10) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by heat crimping the connection terminal and the core wire. A stator as described in any one of the appendices 1 to 5. (Note 11) A method for manufacturing a stator comprising: a stator core having a back yoke portion and a plurality of teeth portions projecting radially inward from the back yoke portion at circumferential intervals; an insulator fixed to the stator core having a metal connection terminal, a teeth insulating portion covering the teeth portions, a protective agent storage portion for filling a protective agent, and a terminal storage portion for housing the connection terminal; and a wire having a metal core covered with an insulating coating, wherein the stator comprises: The first step is to press-fit the aforementioned connection terminal into the terminal housing, A second step of forming an electrical connection portion that electrically connects the core wire and the connection terminal, and an exposed portion in which the core wire is exposed. A third step involves pressing the connection terminal into the terminal housing deeper than the first step until the exposed portion is housed in the protective agent housing, The fourth step is to fill the protective agent storage section with a protective agent. A method for manufacturing a stator. (Note 12) The protective agent to be filled in the fourth step contains silicone. The method for manufacturing a stator as described in Appendix 11. (Note 13) In the second step, the electrical junction is formed by winding a wire around the connection terminal and soldering it. A method for manufacturing a stator as described in Appendix 11 or 12. (Note 14) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, In the second step, the electrical joint is formed by sandwiching a wire between the column and the clamping portion and soldering it. A method for manufacturing a stator as described in Appendix 11 or 12. (Note 15) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, In the second step described above, the electrical joint is formed by sandwiching a wire between the column portion and the clamping portion and performing heat crimping. A method for manufacturing a stator as described in Appendix 11 or 12. (Note 16) The stator core has a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals; the insulator is fixed to the stator core and has a metal connection terminal, a teeth insulating portion that covers the teeth portions, a protective agent storage portion for filling with a protective agent, and a terminal storage portion for housing the connection terminal; and a wire in which a metal core wire is covered with an insulating coating. The aforementioned connection terminal has one end protruding from the terminal housing portion. The wire has a winding portion wound around the stator core via the insulator, an electrical connection portion where the core wire is exposed and the core wire and the connection terminal are electrically joined by heat, and a connection portion connecting the winding portion and the electrical connection portion. The aforementioned connection portion has an exposed portion in which the core wire is exposed. The exposed portion is housed in the protective agent storage portion and is a stator. A rotor core is rotatably provided on the inner circumference side of the stator, The rotating shaft is fixed to the central hole of the rotor core. Motor. (Note 17) The aforementioned protective agent contains silicone The motor described in Appendix 16. (Note 18) The metal contained in the core of the aforementioned wire and the metal contained in the aforementioned connection terminal are of different types. Stator as described in Appendix 16 or 17. (Note 19) The core of the aforementioned wire contains a metal with a higher ionization tendency than the connection terminal. The stator as described in Appendix 18. (Note 20) The core wire of the aforementioned wire contains aluminum. A stator as described in any one of the appendices 16 to 19. (Note 21) The aforementioned connection terminal is columnar in shape. A stator as described in any one of the appendices 16 to 20. (Note 22) The protective agent storage section has a concave shape. A stator as described in any one of the appendices 16 to 21. (Note 23) The aforementioned electrical junction is formed by soldering a wire that has been wound around the connection terminal. A stator as described in any one of the appendices 16 to 22. (Note 24) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by soldering a wire sandwiched between the column portion and the clamping portion. A stator as described in any one of the appendices 16 to 20. (Note 25) The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by heat crimping the connection terminal and the core wire. A stator as described in any one of the appendices 16 to 20. [Explanation of Symbols]

[0087] 5a Bearing, 5b Bearing, 7 Frame, 10 Wire, 10a Core wire, 10b Insulation coating, 14 Cover, 20 Rotor, 21 Rotor core, 22 Rotating shaft, 22a One end of rotating shaft, 30 Stator, 31 Stator core, 31a Teeth section, 31b Back yoke section, 32 Insulator, 35 Terminal housing section, 35a Length of terminal housing section, 36 Protective agent housing section, 36a Depth of protective agent housing section, 37 Protective agent, 50 Stator, 60 Stator, 70a Core wire, 70b Insulation coating, 80 Wire, 80a Core wire, 80b Insulation coating, 90 Main electrode, 91 Sub-electrode, 100 Motor, 200 Motor, 210 Winding section, 220 Electrical joint section, 230 Connection section, 300 Motor, 330 Exposed part, 410 Winding part, 411 Connection terminal, 411a Length of connection terminal to be pressed into the terminal housing in step S101, 411b Length of connection terminal to be pressed into the terminal housing in step S103, 411c Length of connection terminal, 411f End of connection terminal on the non-load side, 411g End of connection terminal on the load side, 420 Electrical junction, 430 Connection part, 511 Connection terminal, 511a Length of connection terminal to be pressed into the terminal housing in step S101, 511b Length of connection terminal to be pressed into the terminal housing in step S103, 511c Length of column, 511f End of column on the non-load side, 511g End of column on the load side, 511h Clamping part, 511r Column, 530 Exposed part, 610 Winding part, 611 Connection terminal, 611h Clamping part, 611r Column section, 620 Electrical connection section, 640 Connection section, 700 Terminal block, 730 Exposed section, 800 Terminal board, 900 Power line,

Claims

1. A stator core having a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals, A connecting terminal made of columnar metal, An insulator fixed to the stator core, having a tooth insulating portion that covers the tooth portion, a terminal housing portion that houses the connection terminal, and a protective agent housing portion provided in the opening of the terminal housing portion for filling with a protective agent, A wire consisting of a metal core covered with an insulating coating, Equipped with, The aforementioned connection terminal has one end protruding from the protective agent storage portion. The wire has a winding portion wound around the stator core via the insulator, an electrical connection portion where the core wire is exposed and the core wire and the connection terminal are electrically joined by heat, and a connection portion connecting the winding portion and the electrical connection portion. The aforementioned connection portion has an exposed portion in which the core wire is exposed. The stator is characterized in that the exposed portion is housed in the protective agent storage portion and covered with a protective agent.

2. The aforementioned protective agent contains silicone The stator according to claim 1.

3. The metal contained in the core of the aforementioned wire and the metal contained in the aforementioned connection terminal are of different types. The stator according to claim 1.

4. The core of the aforementioned wire contains a metal with a higher ionization tendency than the connection terminal. The stator according to claim 3.

5. The core wire of the aforementioned wire contains aluminum. The stator according to claim 1.

6. The protective agent storage section has a concave shape. The stator according to claim 1.

7. The electrical junction is formed by soldering the wire, which is wound around the connection terminal. The stator according to claim 1.

8. The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by soldering the wire, which is sandwiched between the column and the clamping portion. The stator according to claim 1.

9. The aforementioned connection terminal has a column-shaped column portion and a clamping portion that holds the wire between the column portion, The electrical joint is formed by heat crimping the connection terminal and the core wire. The stator according to claim 1.

10. A method for manufacturing a stator comprising: a stator core having a back yoke portion and a plurality of teeth portions projecting radially inward from the back yoke portion at circumferential intervals; a connection terminal made of columnar metal; a teeth insulating portion covering the teeth portions; a terminal housing portion for housing the connection terminal; a protective agent housing portion provided in the opening of the terminal housing portion for filling with a protective agent; an insulator fixed to the stator core; and a wire having a metal core covered with an insulating coating, wherein The first step is to press-fit the aforementioned connection terminal into the terminal housing, A second step of forming an electrical connection portion that electrically connects the core wire and the connection terminal, and an exposed portion in which the core wire is exposed. A third step involves press-fitting the connecting terminal into the terminal housing deeper than the first step, such that the exposed portion is housed in the protective agent housing and the end of the connecting terminal protrudes from the protective agent housing; The fourth step is to fill the protective agent storage section with a protective agent. A method for manufacturing a stator.

11. The stator core has a back yoke portion and a plurality of teeth portions that protrude radially inward from the back yoke portion at circumferential intervals; a connecting terminal made of columnar metal; a teeth insulating portion that covers the teeth portions; a terminal housing portion that houses the connecting terminal; and a protective agent housing portion provided in the opening of the terminal housing portion for filling with a protective agent; and the insulator fixed to the stator core has a metal core wire covered with an insulating coating. The aforementioned connection terminal has one end protruding from the protective agent storage portion. The wire has a winding portion wound around the stator core via the insulator, an electrical connection portion where the core wire is exposed and the core wire and the connection terminal are electrically joined by heat, and a connection portion connecting the winding portion and the electrical connection portion. The aforementioned connection portion has an exposed portion in which the core wire is exposed. The exposed portion is housed in the protective agent storage portion and is a stator. A rotor core is rotatably provided on the inner circumference side of the stator, The rotating shaft is fixed to the central hole of the rotor core. Motor.

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