Stator, stator manufacturing method, and motor

Abstract

To provide a stator, a stator manufacturing method, and a motor that can electrically connect an aluminum wire to a connection terminal without using flux when soldering the aluminum wire.SOLUTION: One end of a connection terminal 411 protrudes from a terminal storage portion 25, an aluminum wire 10 is wound around a reel 22, a terminal wire 26, which is the part corresponding to the start or end of the winding, is wound around the connection terminal 411 with a predetermined gap therebetween, and the joining copper wire 45 is wound around the connection terminal 411 with a predetermined gap therebetween in the section where the terminal wire 26 is wound around the connection terminal 411, and by soldering the connection terminal 411, the terminal wire 26, and the joining copper wire 45 together, stress generated around the joining copper wire 45 mechanically breaks the oxide coating of the terminal wire core wire 26a, and the connection terminal 411 and the terminal wire core wire 26a are electrically connected.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] In a motor stator, a wire is wound around each tooth of the stator core via a reel that covers the stator core. The wire is wound around a metal connection terminal that is press-fitted into the reel, and is electrically connected to the connection terminal. A known method for electrically connecting the wire and the connection terminal is a connection method using soldering.

[0003] Copper wire is often used as the wire, but aluminum wire is also used. When the surface of aluminum is exposed to air, it is immediately covered with a strong oxide film, so when soldering aluminum wire, flux is applied to remove the oxide film before soldering (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3732725 Summary of the Invention [Problem to be solved by the invention]

[0005] When soldering aluminum wire, it is necessary to use flux to remove the oxide film before soldering.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a stator, a method for manufacturing a stator, and a motor that enable an aluminum wire to be electrically connected to a connection terminal without using flux when soldering the aluminum wire. [Means for solving the problem]

[0007] The stator according to the present disclosure has a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward from the back yoke portion and spaced apart circumferentially of the back yoke portion, connection terminals made of metal, a reel insulating portion covering the teeth and the back yoke portion, and a terminal housing portion for housing the connection terminals, and is equipped with a reel fixed to the stator core, an aluminum wire having an aluminum core wire covered with an insulating coating, and a joining wire made of a metal other than aluminum, one end of the connection terminal protruding from the terminal housing portion, the aluminum wire being wound around the reel, a terminal wire corresponding to the start or end of the winding being wound around the connection terminal with a predetermined gap therebetween, and the joining wire is wound around the connection terminal with a predetermined gap therebetween in the section where the terminal wire is wound around the connection terminal, and by soldering the connection terminal, the terminal wire, and the joining wire together, stress generated around the joining wire mechanically breaks down the oxide coating of the terminal wire, electrically connecting the connection terminal and the terminal wire.

[0008] A method for manufacturing a stator according to the present disclosure is a method for manufacturing a stator comprising: a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward of the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a reel having connection terminals made of metal, a reel insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminals; an aluminum wire having a core wire made of aluminum as a main conductor and covered with an insulating film; and a joining wire made of a metal other than aluminum, The method comprises a first step of pressing the terminal into the terminal housing; a second step of winding the aluminum wire around a reel and winding the terminal wire, which is the part corresponding to the beginning or end of the winding, around the connection terminal with a predetermined gap; a third step of winding a joining wire around the connection terminal with a predetermined gap in the section where the terminal wire is wound around the connection terminal; and a fourth step of soldering the connection terminal, the terminal wire, and the joining wire together, whereby stress generated around the joining wire mechanically breaks the oxide film on the terminal wire, and the connection terminal and the terminal wire are electrically connected.

[0009] The motor according to the present disclosure includes a stator, a rotor core rotatably provided on the inner periphery of the stator, and a shaft press-fitted into the rotor core, the stator including a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward of the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion, connection terminals made of metal, a reel insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminals, the reel fixed to the stator core, an aluminum wire having a core wire made of aluminum covered with an insulating film, and an aluminum wire. and a joining wire made of a different metal, wherein one end of the connection terminal protrudes from the terminal storage section, the aluminum wire is wound around a reel, the terminal wire, which is the part corresponding to the start or end of the winding, is wound around the connection terminal with a predetermined gap, and the joining wire is wound around the connection terminal with a predetermined gap in the section where the terminal wire is wound around the connection terminal, and by soldering the connection terminal, the terminal wire, and the joining wire, stress generated around the joining wire mechanically breaks the oxide coating of the terminal wire, and the connection terminal and the terminal wire are electrically connected. [Effects of the Invention]

[0010] According to the present disclosure, when soldering an aluminum wire, the aluminum wire and the connection terminal can be electrically connected without using flux. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a motor according to a first embodiment. [Figure 2] FIG. 2 is a view showing only one side of the cross-sectional view taken along the line AA in FIG. 1. [Figure 3] FIG. 2 is a perspective view of the stator according to the first embodiment. [Figure 4] 1 is a cross-sectional view of an aluminum wire according to a first embodiment. [Figure 5] 2 is a diagram showing the periphery of a connection terminal according to the first embodiment. FIG. [Figure 6]5 is a flowchart showing a method for manufacturing the stator according to the first embodiment. [Figure 7] FIG. 10 is a diagram showing a winding section in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Embodiment 1 The configuration of a motor 100 according to a first embodiment will be described. FIG. 1 is a diagram showing the motor 100 according to the first embodiment. FIG. 2 is a diagram showing only one side of the cross-sectional view taken along line A-A in FIG. 1. Since the internal structure of the motor 100 is symmetrical with respect to the shaft 32, the cross-sectional view on the right side of the page is omitted in FIG. 2.

[0013] Motor 100 is an internal rotation motor in which rotor 30 rotates inside stator 20a. As shown in Figures 1 and 2, motor 100 includes frame 7 and cover 14 that form the outer shell of motor 100, rotor 30, stator 20a, bearings 5a and 5b, terminal block 700, and power line 900, which is a lead wire connected to a power source.

[0014] The rotor 30 is a squirrel-cage rotor that rotates with its outer circumferential surface facing the inner circumferential surface of the stator 20a. The rotor 30 includes a rotor core 31 and a shaft 32. The shaft 32 is press-fitted into the rotor core 31. The shaft 32 is supported by a pair of bearings 5a, 5b on both sides in the axial direction around the rotor core 31.

[0015] One end 32a of the shaft 32 protrudes outside the frame 7. A load (not shown) is connected to the end 32a of the shaft 32 that protrudes outside the frame 7. Hereinafter, in the axial direction of the shaft 32, the side on which the shaft 32 protrudes outside the frame 7, i.e., the lower side of the paper in FIG. 2, will be referred to as the load side. Additionally, the other side on which the shaft 32 does not protrude outside the frame 7, i.e., the upper side of the paper in FIG. 2, will be referred to as the anti-load side.

[0016] The stator 20a has a cylindrical shape and generates a magnetic force for rotating the rotor 30. The stator 20a includes a plurality of stator cores 21, a bobbin 22, a coil 23, and a connection terminal 411.

[0017] Fig. 3 is a perspective view of a stator 20a according to the first embodiment. As shown in Fig. 3, the stator core 21 is formed by laminating a plurality of electromagnetic steel sheets punched into an arc shape. The stator core 21 includes an annular back yoke portion 21b and a plurality of teeth 21a formed to protrude radially inward from the back yoke portion 21b and arranged at intervals in the circumferential direction of the back yoke portion 21b. A slot space (not shown) is formed between two adjacent teeth 21a, and is a space in which the coil 23 is housed. The plurality of stator cores 21 are arranged in an annular shape.

[0018] 3, the reel 22 is fixed to the stator core 21. The reel 22 also includes a reel insulating portion 24 and a terminal housing portion 25. The reel insulating portion 24 and the terminal housing portion 25 are each made of an insulating material.

[0019] The winding frame insulating portion 24 is provided to cover the teeth portion 21a and insulates the teeth portion 21a from the coil 23. The winding frame insulating portion 24 is also provided to cover the back yoke portion 21b and insulates the back yoke portion 21b from the coil 23.

[0020] The terminal housing portion 25 is provided in the winding frame insulating portion 24 provided between the back yoke portion 21b and the coil 23. The terminal housing portion 25 also has an insertion hole for housing the connection terminal 411.

[0021] As shown in Fig. 3, coil 23 is formed by attaching reel 22 to tooth portion 21a and then winding aluminum wire 10, which is a wire containing aluminum, around reel 22. Fig. 4 is a cross-sectional view of aluminum wire 10 according to embodiment 1. Aluminum wire 10 has a core wire 10a made of aluminum as a main conductor, the outer periphery of which is covered with insulating coating 10b. Insulating coating 10b is made of, for example, a polyester-based or urethane-based material.

[0022] Furthermore, the aluminum wire 10 corresponding to the start or end of the winding of the coil 23 is referred to as the wire terminal 26 of the aluminum wire 10 (hereinafter referred to as the wire terminal 26), the portion of the wire terminal 26 corresponding to the core 10a is referred to as the wire terminal core 26a, and the portion of the wire terminal 26 corresponding to the insulating coating 10b is referred to as the wire terminal insulating coating 26b. The wire terminal 26 is wound any number of times around the connection terminal 411 press-fitted into the terminal housing 25 and electrically connected to the connection terminal 411 by soldering. Specifically, the heat of the solder removes the wire terminal insulating coating 26b covering the outer periphery of the wire terminal core 26a, exposing the wire terminal core 26a. The aluminum oxide coating of the wire terminal core 26a is then mechanically broken, electrically connecting the exposed wire terminal core 26a to the connection terminal 411. Note that the wire terminal insulating coating 26 may be removed from the wire terminal 26 by heating or peeling it off before soldering.

[0023] FIG. 5 is a partially enlarged view of FIG. 2 and illustrates a connection terminal 411 according to the first embodiment. The connection terminal 411 is a rectangular prism-shaped terminal made of copper-plated soft steel wire. As shown in FIG. 5, the load-side end of the connection terminal 411 is press-fitted into the terminal housing 25 and is provided on the upper surface of the reel 22, i.e., on the anti-load side of the reel 22. The anti-load-side end of the connection terminal 411 protruding from the terminal housing 25 can be electrically connected to other components. For example, as shown in FIGS. 3 and 5, the anti-load-side end of the connection terminal 411 is wound with the terminal wire 26 and the bonding copper wire 45, which is a bonding wire, an arbitrary number of times and electrically connected by soldering. Here, the portion of the connection terminal 411 where the terminal wire 26 and the bonding copper wire 45 are wound an arbitrary number of times is referred to as the winding portion 42a. The portion where the winding portion 42a is soldered is referred to as the solder portion 43a.

[0024] The winding portion 42a is wound so that the terminal wire 26 and the bonding copper wire 45 are arranged alternately. Specifically, the terminal wire 26 is wound around the connection terminal 411 with a predetermined gap therebetween. Here, the predetermined gap is a gap that allows the bonding copper wire 45 to be arranged in the gap between the wound terminal wire 26. Specifically, the bonding copper wire 45 is wound with a predetermined gap therebetween in the section where the terminal wire 26 is wound around the connection terminal 411. Specifically, the bonding copper wire 45 is wound around the connection terminal 411 so as to be arranged in the gap between the wound terminal wire 26. By winding the terminal wire 26 and the bonding copper wire 45 in this manner, two types of wire are arranged alternately on the surface of the connection terminal 411, i.e., the terminal wire 26, the bonding copper wire 45, the terminal wire 26, and the bonding copper wire 45.

[0025] The solder portion 43a is formed by, for example, a DIP soldering method, in which solder is melted in a solder bath, the wound portion 42a is immersed in the solder bath, and the solder is cooled to bond the wound portion 42a.

[0026] Terminal block 700 is made of resin, which is an insulating material. As shown in Fig. 2, terminal block 700 includes a wiring board 800. Wiring board 800 is electrically connected to coil 23 by connecting to the end of connection terminal 411 on the anti-load side. Wiring board 800 also supplies power to the coil by connecting to power line 900.

[0027] Next, a description will be given of a method for manufacturing the stator 20a according to embodiment 1. Fig. 6 is a flowchart showing a method for manufacturing the stator 20a according to embodiment 1.

[0028] First, the load side end of the connection terminal 411 is press-fitted into the terminal housing portion 25 (S1).

[0029] Next, the aluminum wire 10 is wound around the spool 22 to form the coil 23. The terminal wire 26 is wound around the end of the connection terminal 411 on the anti-load side with a predetermined gap therebetween (S2).

[0030] Next, the joining copper wire 45 is wound around the end of the connection terminal 411 on the anti-load side. The joining copper wire 45 is wound with a predetermined gap in the section where the terminal wire core wire 26a is wound around the connection terminal 411. Specifically, the joining copper wire 45 is wound around the connection terminal 411 so as to be positioned in the gap between the wound terminal wire core wires 26a. As a result, the terminal wire core wires 26a and the joining copper wire 45 are wound around the end of the connection terminal 411 on the anti-load side so as to be alternately arranged, and a winding portion 42a is formed (S3).

[0031] Next, the winding portion 42a is soldered and electrically joined, for example, by a DIP soldering method in which the winding portion 42a is placed in a solder bath. Specifically, as the winding portion 42a is joined by soldering, the wire terminal insulation coating 26b of the wire terminal 26 is removed, exposing the wire terminal core 26a, and the aluminum oxide coating of the wire terminal core 26a is mechanically broken. The exposed wire terminal core 26a is then electrically connected to the connection terminal 411. When the solder portion 43a is formed by soldering, the process ends (S4).

[0032] Here, the general operation of soldering copper wires and aluminum wires will be described.

[0033] When soldering copper wire, no special pretreatment is required; the solder is melted around the copper wire and cooled to form a bond.

[0034] On the other hand, when soldering aluminum wire 10, aluminum is immediately covered with a strong oxide film when its surface is exposed to air. Therefore, the aluminum oxide film must be removed, and then solder is melted around the aluminum wire 10 and cooled to join the wires. As described above, a conventional method for removing the oxide film is to apply a highly active flux as a pretreatment, as described in the Background Art section. Thus, when soldering aluminum wire 10, pretreatment is required to remove the oxide film from the aluminum surface, which increases the number of work steps.

[0035] Furthermore, when pre-processing is performed using a highly active flux, not only the work of applying the flux but also work after the flux has been applied must be performed.

[0036] For example, when soldering using flux containing chlorides, the flux not only removes the oxide film but may also corrode the aluminum, so it is necessary to rinse with water after soldering.

[0037] For example, when soldering using a flux containing fluoride, it must be activated at high temperatures. Therefore, during soldering, the aluminum wire 10 may melt more than necessary, causing the exposed core 10a to come into contact with nearby metallic components, potentially resulting in galvanic corrosion. Therefore, the exposed core 10a must be covered with a protective agent.

[0038] As described above, when applying flux and then soldering the aluminum wire 10, post-processing must be performed according to the characteristics of each flux, which increases the number of work steps.

[0039] 6, in the present disclosure, even when soldering the aluminum wire 10 (terminal wire 26), the soldering is performed without using flux. That is, in the present invention, the aluminum wire 10 can be soldered using a process similar to that used for soldering a copper wire. This is because the terminal wires 26 and the joining copper wires 45 are alternately arranged in the winding portion 42a, which mechanically breaks the oxide coating formed on the surface of the terminal wire core wire 26a, and the aluminum of the terminal wire core wire 26a and the solder are electrically connected.

[0040] The mechanism by which the aluminum of the terminal wire core 26a is electrically connected to the solder will now be described. When the winding portion 42a is immersed in a solder bath, as the molten solder around the joining copper wire 45 hardens, uneven stress acts on the surface of the adjacent terminal wire core 26a, centered around the joining copper wire 45. This stress mechanically tears the oxide coating formed on the surface of the adjacent terminal wire core 26a. The connection terminal 411, terminal wire 26a, and joining copper wire 45 are then joined by solder, and the aluminum of the terminal wire core 26a is electrically connected to the solder.

[0041] As described above, stator 20a according to the first embodiment includes stator core 21 having an annular back yoke portion 21b and a plurality of teeth 21a formed to protrude radially inward from back yoke portion 21b and arranged at intervals in the circumferential direction of back yoke portion 21b, connection terminals 411 made of metal, reel insulating portion 24 covering teeth 21a and back yoke portion 21b, and terminal housing portion 25 for housing connection terminals 411. Reel 22 is fixed to stator core 21, aluminum wire 10 having core wire 10a made of aluminum as a main conductor covered with insulating coating 10b, and joining wire 10a made of a metal other than aluminum. The connecting terminal 411 has one end protruding from the terminal storage portion 25, the aluminum wire 10 is wound around the reel 22, the terminal wire 26, which is the portion corresponding to the start or end of the winding, is wound around the connecting terminal 411 with a predetermined gap therebetween, and the joining copper wire 45 is wound around the connecting terminal 411 with a predetermined gap therebetween in the section where the terminal wire 26 is wound around the connecting terminal 411, and by soldering the connecting terminal 411, the terminal wire 26, and the joining copper wire 45, stress generated around the joining copper wire 45 mechanically breaks the oxide coating of the terminal wire core wire 26a, and the connecting terminal 411 and the terminal wire core wire 26a are electrically connected. The terminal wire 26 and the joining copper wire 45 are wound around the same section of the connection terminal 411 with a predetermined gap between them, which mechanically breaks the oxide film formed on the surface of the terminal wire core 26a, electrically connecting the aluminum of the terminal wire core 26a to the solder. This makes it possible to solder the aluminum wire 10 (terminal wire core 26a) without using flux. This eliminates the need for pre-processing using flux.

[0042] The terminal wire 26 and the joining copper wire 45 may be wound around the connection terminal 411 so as to be arranged alternately.

[0043] Furthermore, the manufacturing method of the stator 20a according to the first embodiment includes a first step of press-fitting the connection terminal 411 into the terminal accommodating portion 25; a second step of winding the aluminum wire 10 around the reel 22 and winding the terminal wire 26, which is the portion corresponding to the start or end of the winding, around the connection terminal 411 with a predetermined gap; a third step of winding the joining copper wire 45 around the connection terminal 411 with a predetermined gap in the section where the terminal wire 26 is wound around the connection terminal 411; and a fourth step of soldering the connection terminal 411, the terminal wire core wire 26a, and the joining copper wire 45 together, whereby stress generated around the joining copper wire 45 mechanically breaks the oxide coating of the terminal wire core wire 26a, and electrically connecting the connection terminal 411 and the terminal wire core wire 26a. In the manufacturing method of the stator 20a according to embodiment 1, it is also possible to solder the aluminum wire 10 (terminal wire core wire 26a) without using flux, which reduces the number of work steps compared to when pre-processing is performed using flux.

[0044] Furthermore, since the connecting terminal 411 according to the first embodiment has a rectangular prism shape, it is easy to hold the wound terminal wire 26 and the joining copper wire 45. Furthermore, the shape is not limited to a rectangular prism, and as long as it has a rectangular prism shape, it is easy to hold the wound terminal wire 26 and the joining copper wire 45.

[0045] It should be noted that the connection terminal 411 according to the first embodiment does not have to be prismatic, but may be cylindrical, for example.

[0046] The bonding copper wire 45 according to the first embodiment may be a bonding wire made of another metal instead of a copper wire. Here, the other metal wire is a metal other than aluminum, and when soldered alone, it can be soldered in the same process as copper wire. The other metal wire may be, for example, a tin-plated copper wire, a gold wire, or a silver wire.

[0047] The soldering method according to the first embodiment does not have to be a DIP soldering method, and may be, for example, soldering using a soldering pad.

[0048] Embodiment 2 The configuration of winding portion 42b of stator 20b in embodiment 2 will be described. Fig. 7 is a diagram showing winding portion 42b in embodiment 2. Winding portion 42b in embodiment 2 differs from embodiment 1 in the position where joining copper wire 45 is wound around connection terminal 411. Note that parts that are the same as or equivalent to those in embodiment 1 are given the same reference numerals and description thereof will be omitted.

[0049] In the winding portion 42b, the terminal wire 26 and the joining copper wire 45 are wound so as to be arranged crosswise. The winding portion 42b is joined by soldering to form the solder portion 43b.

[0050] The process of forming the winding portion 42b will be described. As in the first embodiment, the terminal wire 26 is wound around the end of the connection terminal 411 on the anti-load side, leaving a predetermined gap therebetween. Thereafter, the joining copper wire 45 is wound around the end of the connection terminal 411 on the anti-load side. The joining copper wire 45 is wound around the section of the connection terminal 411 where the terminal wire 26 is wound, leaving a predetermined gap therebetween. Specifically, the joining copper wire 45 is wound around the connection terminal 411 so as to cross over and partially overlap the wound terminal wire 26. As a result, the terminal wire 26 and the joining copper wire 45 are wound around the end of the connection terminal 411 on the anti-load side, so that the winding portion 42b is formed.

[0051] Even when the terminal wire 26 and the joining copper wire 45 are wound around the connection terminal 411 so as to be arranged crosswise, the oxide coating formed on the surface of the terminal wire core wire 26a is mechanically broken, and the aluminum of the terminal wire core wire 26a and the solder are electrically connected. Therefore, it is possible to solder the aluminum wire 10 using a process similar to that used when soldering a copper wire using the DIP soldering method.

[0052] As described above, in the stator 20b according to the second embodiment, the terminal wires 26 and the joining wires are wound so as to be arranged crosswise, and therefore the aluminum wires 10 (terminal wire core wires 26a) can be soldered by DIP soldering without using flux. Therefore, compared to when pretreatment is performed using flux, the number of work steps can be reduced.

[0053] Furthermore, in the stator 20b according to the second embodiment, the joining copper wires 45 are disposed above the terminal wires 26 so as to cross each other, and therefore, during soldering, the solder tends to melt preferentially around the joining copper wires 45. As a result, when the solder hardens, non-uniform stress occurs around the joining copper wires 45. This makes it easier for the oxide coating formed on the surface of the terminal wire core wires 26a to be mechanically torn, and the aluminum of the terminal wire core wires 26a and the solder are electrically connected.

[0054] In the stator 20b according to the second embodiment, the joining copper wire 45 may be wound around the end of the connection terminal 411 on the anti-load side, and then the terminal wire 26 may be wound around the end with a predetermined gap therebetween.

[0055] The configurations described in the above embodiments are merely examples of the contents of the present disclosure, and may be combined with other known technologies. Furthermore, parts of the configurations may be omitted or modified without departing from the scope of the present disclosure.

[0056] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward from the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a connection terminal made of metal; a winding frame fixed to the stator core, the winding frame including a winding frame insulating portion that covers the teeth portion and the back yoke portion and a terminal housing portion that houses the connection terminal; An aluminum wire with an aluminum core covered with an insulating coating, A joining wire made of a metal other than aluminum, Equipped with One end of the connection terminal protrudes from the terminal housing portion, The aluminum wire is wound around the spool, and a terminal wire, which is a portion corresponding to the start or end of the winding, is wound around the connection terminal with a predetermined gap therebetween; the joining wire is wound around the connection terminal with a predetermined gap therebetween in the section where the terminal wire is wound around the connection terminal, By soldering the connection terminal, the terminal wire, and the bonding wire, stress generated around the bonding wire mechanically breaks the oxide film of the terminal wire, and the connection terminal and the terminal wire are electrically connected. stator. (Appendix 2) The terminal wires of the aluminum wire and the bonding wire are wound alternately. 1. A stator as described in Appendix 1. (Appendix 3) The terminal wire of the aluminum wire and the bonding wire are wound so as to be disposed crosswise. 3. A stator according to claim 1 or 2. (Appendix 4) The bonding wire is wound around the terminal wire of the aluminum wire so as to cross over the terminal wire. 1. A stator as described in Appendix 3. (Appendix 5) The connection terminal is prismatic. 5. The stator of any one of claims 1 to 4. (Appendix 6) a stator manufacturing method for manufacturing a stator comprising: a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward of the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a reel having connection terminals made of metal, a reel insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminals; an aluminum wire having a core wire made of aluminum as a main conductor covered with an insulating film; and a joining wire made of a metal other than aluminum, a first step of press-fitting the connection terminal into the terminal accommodating portion; a second step of winding the aluminum wire around the spool and winding a terminal wire, which is a portion corresponding to the start or end of the winding, around the connection terminal with a predetermined gap therebetween; a third step of winding the joining wire around the connection terminal at predetermined intervals in a section where the terminal wire is wound around the connection terminal; a fourth step in which stress generated around the bonding wire by soldering the connection terminal, the terminal wire, and the bonding wire mechanically breaks the oxide film of the terminal wire, thereby electrically connecting the connection terminal and the terminal wire; A method for manufacturing a stator comprising: (Appendix 7) A stator; a rotor core rotatably provided on the inner circumferential side of the stator; a shaft press-fitted into the rotor core; Equipped with The stator includes: a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward from the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a connection terminal made of metal; a winding frame fixed to the stator core, the winding frame including a winding frame insulating portion that covers the teeth portion and the back yoke portion and a terminal housing portion that houses the connection terminal; An aluminum wire with an aluminum core covered with an insulating coating, A joining wire made of a metal other than aluminum, Equipped with One end of the connection terminal protrudes from the terminal housing portion, The aluminum wire is wound around the spool, and a terminal wire, which is a portion corresponding to the start or end of the winding, is wound around the connection terminal with a predetermined gap therebetween; the joining wire is wound around the connection terminal with a predetermined gap therebetween in the section where the terminal wire is wound around the connection terminal, By soldering the connection terminal, the terminal wire, and the bonding wire, stress generated around the bonding wire mechanically breaks the oxide film of the terminal wire, and the connection terminal and the terminal wire are electrically connected. Motor. [Explanation of symbols]

[0057] 5a, 5b bearings, 7 frame, 10 aluminum wire, 10a core wire, 10b insulating coating, 14 cover, 20a, 20b stator, 21 stator core, 21a teeth portion, 21b back yoke portion, 22 winding frame, 23 coil, 24 winding frame insulating portion, 25 terminal storage portion, 26 terminal wire, 26a terminal wire core wire, 26b terminal wire insulating coating, 30 rotor, 31 rotor core, 32 shaft, 42a, 42b winding portion, 43a, 43b solder portion, 100 motor, 411 connection terminal, 700 terminal block, 800 connection board, 900 power line

Claims

1. a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward from the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a connection terminal made of metal; a winding frame fixed to the stator core, the winding frame including a winding frame insulating portion that covers the teeth portion and the back yoke portion and a terminal housing portion that houses the connection terminal; An aluminum wire with an aluminum core covered with an insulating coating, A joining wire made of a metal other than aluminum, Equipped with One end of the connection terminal protrudes from the terminal housing portion, The aluminum wire is wound around the spool, and a terminal wire, which is a portion corresponding to the start or end of the winding, is wound around the connection terminal with a predetermined gap therebetween; the joining wire is wound around the connection terminal with a predetermined gap therebetween in the section where the terminal wire is wound around the connection terminal, By soldering the connection terminal, the terminal wire, and the bonding wire, stress generated around the bonding wire mechanically breaks the oxide film of the terminal wire, and the connection terminal and the terminal wire are electrically connected. stator.

2. The terminal wires of the aluminum wire and the bonding wire are wound alternately. The stator of claim 1 .

3. The terminal wire of the aluminum wire and the bonding wire are wound so as to be disposed crosswise.

3. The stator according to claim 1 or 2.

4. The bonding wire is wound around the terminal wire of the aluminum wire so as to cross over the terminal wire. The stator according to claim 3 .

5. The connection terminal is prismatic.

3. The stator according to claim 1 or 2.

6. a stator manufacturing method for manufacturing a stator comprising: a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward of the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a reel having connection terminals made of metal, a reel insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminals; an aluminum wire having a core wire made of aluminum as a main conductor covered with an insulating film; and a joining wire made of a metal other than aluminum, a first step of press-fitting the connection terminal into the terminal accommodating portion; a second step of winding the aluminum wire around the spool and winding a terminal wire, which is a portion corresponding to the start or end of winding, around the connection terminal with a predetermined gap therebetween; a third step of winding the joining wire around the connection terminal at predetermined intervals in a section where the terminal wire is wound around the connection terminal; a fourth step in which stress generated around the bonding wire by soldering the connection terminal, the terminal wire, and the bonding wire mechanically breaks the oxide film of the terminal wire, thereby electrically connecting the connection terminal and the terminal wire; A method for manufacturing a stator comprising:

7. A stator; a rotor core rotatably provided on the inner circumferential side of the stator; a shaft press-fitted into the rotor core; Equipped with The stator includes: a stator core having an annular back yoke portion and a plurality of teeth formed to protrude radially inward from the back yoke portion and arranged at intervals in the circumferential direction of the back yoke portion; a connection terminal made of metal; a winding frame fixed to the stator core, the winding frame including a winding frame insulating portion that covers the teeth portion and the back yoke portion and a terminal housing portion that houses the connection terminal; An aluminum wire with an aluminum core covered with an insulating coating, A joining wire made of a metal other than aluminum, Equipped with One end of the connection terminal protrudes from the terminal housing portion, The aluminum wire is wound around the spool, and a terminal wire, which is a portion corresponding to the start or end of the winding, is wound around the connection terminal with a predetermined gap therebetween; the joining wire is wound around the connection terminal with a predetermined gap therebetween in the section where the terminal wire is wound around the connection terminal, By soldering the connection terminal, the terminal wire, and the bonding wire, stress generated around the bonding wire mechanically breaks the oxide film of the terminal wire, and the connection terminal and the terminal wire are electrically connected. Motor.

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