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 Art

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

[0003] Although copper wire is often used for the wire, aluminum wire may be used. Since the surface of aluminum is immediately covered with a strong oxide film when exposed to air, when soldering is performed using aluminum wire, flux is applied to remove the oxide film and then soldering is performed (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When soldering aluminum wire, it was necessary to remove the oxide film using flux and then perform soldering.

[0006] The present disclosure has been made to solve the above problems, and an object thereof is to provide a stator, a method for manufacturing a stator, and a motor in which an aluminum wire and a connection terminal can be electrically connected without using flux when soldering the aluminum wire.

Means for Solving the Problems

[0007] The stator according to the present disclosure includes a stator core having an annular back yoke portion and a plurality of teeth portions formed to protrude radially inward of 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 insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminal, a winding frame fixed to the stator core, an aluminum wire in which a core wire made of aluminum is covered with an insulating coating, and a bonding wire made of a metal different from aluminum. One end of the connection terminal protrudes from the terminal housing portion. The aluminum wire is wound around the winding frame, and a terminal wire, which is a portion corresponding to the start or end of winding, is wound around the connection terminal with a gap at a predetermined interval. The bonding wire is wound around the connection terminal with a gap at a predetermined interval in a section where the terminal wire is wound around the connection terminal. By soldering the connection terminal, the terminal wire, and the bonding wire, the 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.

[0008] A method for manufacturing a stator according to the present disclosure is a method for manufacturing a stator including a stator core having an annular back yoke portion and a plurality of teeth portions formed to protrude radially inward of 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 insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminal, a winding frame fixed to the stator core, an aluminum wire in which a core wire made of aluminum is covered with an insulating coating, and a bonding wire made of a metal different from aluminum. The method includes a first step of press-fitting the connection terminal into the terminal housing portion, a second step of winding the aluminum wire around the winding frame and winding a terminal wire, which is a portion corresponding to the start or end of winding, around the connection terminal with a gap at a predetermined interval, a third step of winding the bonding wire around the connection terminal with a gap at a predetermined interval in a 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 bonding wire, so that the 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.

[0009] The motor according to the present disclosure includes a stator, a rotor core rotatably provided on the inner circumferential side of the stator, and a shaft press-fitted into the rotor core. The stator includes an annular back yoke portion, a stator core having a plurality of teeth portions formed to protrude radially inward of 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 insulating portion covering the teeth portions and the back yoke portion, and a terminal housing portion for housing the connection terminal. The stator further includes a winding frame fixed to the stator core, an aluminum wire in which a core wire made of aluminum is covered with an insulating coating, and a bonding wire made of a metal different from aluminum. One end of the connection terminal protrudes from the terminal housing portion. The aluminum wire is wound around the winding frame, and a terminal wire, which is a portion corresponding to the start or end of winding, is wound around the connection terminal with a predetermined gap therebetween. The bonding wire is wound around the section of the connection terminal around which the terminal wire is wound with a predetermined gap therebetween. By soldering the connection terminal, the terminal wire, and the bonding wire, the 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.

Advantages of the Invention

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

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0012] Embodiment 1. The configuration of the motor 100 according to Embodiment 1 will be described. FIG. 1 is a diagram showing the motor 100 according to Embodiment 1. FIG. 2 is a diagram showing only one side of the A - A cross-sectional view of FIG. 1. Since the internal structure of the motor 100 is symmetric about the shaft 32, the cross-sectional view on the right side of the paper in FIG. 2 is omitted.

[0013] The motor 100 is an inner-rotating type motor in which the rotor 30 rotates inside the stator 20a. As shown in FIGS. 1 and 2, the motor 100 includes a frame 7 and a cover 14 that constitute the outer shell of the motor 100, a rotor 30, a stator 20a, bearings 5a and 5b, a terminal block 700, and a power line 900 that is a lead wire connected to a power source.

[0014] The rotor 30 is a cage-type rotor that rotates with its outer peripheral surface facing the inner peripheral 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. Also, the shaft 32 is supported by a pair of bearings 5a and 5b on both axial sides with the rotor core 31 as the center.

[0015] One end 32a of the shaft 32 protrudes outside the frame 7. A load (not shown) is connected to the one end 32a side of the shaft 32 that protrudes outside the frame 7. Hereinafter, in the direction along the axial direction of the shaft 32, the one direction side where the shaft 32 protrudes outside the frame 7, that is, the lower side of the paper in FIG. 2, is called the load side. Also, the other direction side where the shaft 32 does not protrude outside the frame 7, that is, the upper side of the paper in FIG. 2, is called 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 the stator 20a according to Embodiment 1. As shown in FIG. 3, the stator core 21 is formed by laminating a plurality of electromagnetic steel sheets punched in an arc shape. The stator core 21 includes an annular back yoke portion 21b and a plurality of teeth portions 21a formed to protrude radially inward of the back yoke portion 21b and arranged at intervals in the circumferential direction of the back yoke portion 21b. Further, a slot space (not shown), which is a space for accommodating the coil 23, is formed between two adjacent teeth portions 21a. The plurality of stator cores 21 are arranged in an annular shape.

[0018] As shown in FIG. 3, the bobbin 22 is fixed to the stator core 21. The bobbin 22 includes a bobbin insulation portion 24 and a terminal accommodation portion 25. The bobbin insulation portion 24 and the terminal accommodation portion 25 are each made of an insulating material.

[0019] The bobbin insulation portion 24 is provided so as to cover the teeth portion 21a and insulates the teeth portion 21a and the coil 23. Further, the bobbin insulation portion 24 is provided so as to cover the back yoke portion 21b and insulates the back yoke portion 21b and the coil 23.

[0020] The terminal accommodation portion 25 is provided in the bobbin insulation portion 24 provided between the back yoke portion 21b and the coil 23. The terminal accommodation portion 25 has an insertion hole for accommodating the connection terminal 411.

[0021] As shown in FIG. 3, the coil 23 is formed by winding an aluminum wire 10, which is a wire containing aluminum, around the bobbin 22 after attaching the bobbin 22 to the teeth portion 21a. FIG. 4 is a cross-sectional view of the aluminum wire 10 according to Embodiment 1. The aluminum wire 10 has a configuration in which the outer periphery of a core wire 10a made of aluminum as a conductor is covered with an insulating coating 10b. The insulating coating 10b uses, for example, a polyester-based or urethane-based material.

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

[0023] FIG. 5 is a partially enlarged view of FIG. 2 and is a view showing the connection terminal 411 according to the first embodiment. The connection terminal 411 is a square columnar terminal obtained by copper-plating a mild steel wire. As shown in FIG. 5, the end portion on the load side of the connection terminal 411 is press-fitted into the terminal housing portion 25 and is provided on the upper surface of the winding frame 22, that is, on the side opposite to the load side of the winding frame 22. Further, the end portion on the side opposite to the load side of the connection terminal 411 protruding from the terminal housing portion 25 can be electrically connected to other components. For example, as shown in FIGS. 3 and 5, the end portion on the side opposite to the load side of the connection terminal 411 is wound around the terminal wire 26 and the bonding copper wire 45 which is a bonding wire any number of times and is electrically connected by soldering. Here, the portion where the terminal wire 26 and the bonding copper wire 45 are wound around the connection terminal 411 any number of times is referred to as a winding portion 42a. Further, the portion where the winding portion 42a is joined by solder is referred to as a solder portion 43a.

[0024] The winding portion 42a is wound such that the terminal wires 26 and the bonding copper wires 45 are alternately arranged. Specifically, the terminal wires 26 are wound around the connection terminals 411 with a gap at a predetermined interval. Here, the predetermined interval is an interval that allows the bonding copper wires 45 to be arranged in the gaps between the wound terminal wires 26. Further, specifically, the bonding copper wires 45 are wound around the connection terminals 411 with a gap at a predetermined interval in the section where the terminal wires 26 are wound around the connection terminals 411. Specifically, the bonding copper wires 45 are wound around the connection terminals 411 so as to be arranged in the gaps between the wound terminal wires 26. By winding the terminal wires 26 and the bonding copper wires 45 in this way, two types of wires are alternately arranged on the surface of the connection terminals 411, such as terminal wire 26, bonding copper wire 45, terminal wire 26, bonding copper wire 45.

[0025] The solder portion 43a is formed, for example, by a DIP soldering method. The DIP soldering method is a method of melting solder in a solder bath, impregnating the winding portion 42a in the solder bath, and cooling and joining.

[0026] The terminal block 700 is formed of a resin which is an insulating material. As shown in FIG. 2, the terminal block 700 includes a connection board 800. The connection board 800 is electrically connected to the coil 23 by connecting to the end portion on the non-load side of the connection terminal 411. Further, the connection board 800 supplies power to the coil by connecting to the power line 900.

[0027] Next, a method for manufacturing the stator 20a according to Embodiment 1 will be described. FIG. 6 is a flowchart showing the method for manufacturing the stator 20a according to Embodiment 1.

[0028] First, the end portion on the load side 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 winding frame 22 to form the coil 23. The terminal wires 26 are wound around the end portion on the non-load side of the connection terminal 411 with a gap at a predetermined interval (S2).

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

[0031] Next, the winding portion 42a is soldered, for example, by a DIP soldering method in which the winding portion 42a is attached to a soldering bath and electrically joined. Specifically, during the process of joining the winding portion 42a with solder, the terminal wire insulation film 26b of the terminal wire 26 is removed, the terminal wire core 26a is exposed, and the aluminum oxide film on the terminal wire core 26a is mechanically broken. Then, the exposed terminal wire core 26a and the connection terminal 411 are electrically connected. When a solder portion 43a is formed by soldering, the process is terminated (S4).

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

[0033] When soldering a copper wire, no special pretreatment is performed. Solder is melted around the copper wire, cooled, and joined.

[0034] On the other hand, when soldering an aluminum wire 10, since the surface of aluminum is immediately covered with a strong oxide film when exposed to air, after removing the aluminum oxide film, solder is melted around the aluminum wire 10, cooled, and joined. As a conventional method for removing the oxide film, as shown in the background art, for example, there is a method of performing pretreatment by applying a flux with strong activity. Thus, when soldering the aluminum wire 10, pretreatment for removing the oxide film on the surface of aluminum is required, increasing the number of man-hours.

[0035] Furthermore, when performing post-treatment using a flux with strong active power, it is necessary to perform operations not only during the application of the flux but also after the application of the flux.

[0036] For example, when soldering using a flux containing chloride, the flux not only removes the oxide film but may also corrode aluminum. Therefore, it is necessary to perform water washing after soldering.

[0037] For example, when soldering using a flux containing fluoride, it is necessary to activate at a high temperature. Therefore, during soldering, the aluminum wire 10 may be melted more than necessary, and the exposed core wire 10a may come into contact with a metallic member in proximity, potentially causing galvanic corrosion. Thus, the exposed core wire 10a needs to be covered with a protective agent.

[0038] As described above, when soldering the aluminum wire 10 after applying the flux, it is necessary to perform post-treatment according to the characteristics of each flux, resulting in an increase in the number of work steps.

[0039] Here, as shown in step S4 in FIG. 6, in the present disclosure, even when soldering the aluminum wire 10 (terminal wire 26), soldering is performed without using a flux. That is, in the present invention, it is possible to solder the aluminum wire 10 in the same process as when soldering a copper wire. This is because the oxide film formed on the surface of the terminal wire core 26a is mechanically broken by the alternating arrangement of the terminal wire 26 and the bonding copper wire 45 in the winding portion 42a, and the solder is electrically connected to the aluminum of the terminal wire core 26a.

[0040] Describe the mechanism by which the aluminum of the terminal core wire 26a is electrically connected to the solder. When the winding part 42a is dipped into the solder bath, when the molten solder solidifies around the bonding copper wire 45, non-uniform stress acts on the surface of the terminal core wire 26a arranged adjacent thereto with the bonding copper wire 45 as the center. Due to this stress, the oxide film formed on the surface of the terminal core wire 26a arranged adjacent thereto is mechanically broken. Then, the connection terminal 411, the terminal core wire 26a, and the bonding copper wire 45 are joined by the solder, and the aluminum of the terminal core wire 26a and the solder are electrically connected.

[0041] As described above, the stator 20a according to Embodiment 1 includes a stator core 21 having an annular back yoke portion 21b and a plurality of teeth portions 21a formed to protrude radially inward of the back yoke portion 21b and arranged at intervals in the circumferential direction of the back yoke portion 21b, a connection terminal 411 made of metal, a winding frame insulating portion 24 covering the teeth portions 21a and the back yoke portion 21b, and a terminal housing portion 25 housing the connection terminal 411. The stator 20a further includes a winding frame 22 fixed to the stator core 21, an aluminum wire 10 in which a core wire 10a made of aluminum is covered with an insulating coating 10b, and a bonding copper wire 45 which is a bonding wire made of a metal different from aluminum. One end of the connection terminal 411 protrudes from the terminal housing portion 25. The aluminum wire 10 is wound around the winding frame 22. A terminal wire 26, which is a portion corresponding to the start or end of winding, is wound around the connection terminal 411 with a gap therebetween at a predetermined interval. The bonding copper wire 45 is wound around the connection terminal 411 with a gap therebetween at a predetermined interval in a section where the terminal wire 26 is wound around the connection terminal 411. By soldering the connection terminal 411, the terminal wire 26, and the bonding copper wire 45, the stress generated around the bonding copper wire 45 mechanically breaks the oxide film on the terminal wire core 26a, and the connection terminal 411 and the terminal wire core 26a are electrically connected. With the configuration in which the terminal wire 26 and the bonding copper wire 45 are wound around the connection terminal 411 with gaps therebetween at predetermined intervals in the same section, the oxide film formed on the surface of the terminal wire core 26a is mechanically broken, and the aluminum of the terminal wire core 26a and the solder are electrically connected. Therefore, it is possible to solder the aluminum wire 10 (terminal wire core 26a) without using flux. Accordingly, the pretreatment using flux becomes unnecessary.

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

[0043] Further, the method for manufacturing the stator 20a according to Embodiment 1 includes a first step of press-fitting the connection terminal 411 into the terminal housing portion 25, a second step of winding the aluminum wire 10 around the winding frame 22 and winding the terminal wire 26, which is a portion corresponding to the start or end of winding, around the connection terminal 411 with a gap at a predetermined interval, a third step of winding the bonding copper wire 45 around the connection terminal 411 with a predetermined interval at 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 26a, and the bonding copper wire 45, whereby the stress generated around the bonding copper wire 45 mechanically breaks the oxide film of the terminal wire core 26a and the connection terminal 411 and the terminal wire core 26a are electrically connected. Also in the method for manufacturing the stator 20a according to Embodiment 1, it is possible to solder the aluminum wire 10 (terminal wire core 26a) without using flux, and the number of man-hours can be reduced as compared with the case of performing pretreatment using flux.

[0044] Further, since the connection terminal 411 according to Embodiment 1 has a quadrangular prism shape, it is easy to hold the terminal wire 26 and the bonding copper wire 45 in a wound state. Also, it is not limited to a quadrangular prism shape, and if it has a prism shape, it is easy to hold the terminal wire 26 and the bonding copper wire 45 in a wound state.

[0045] Note that the connection terminal 411 according to Embodiment 1 may not have a prism shape, for example, it may have a cylindrical shape.

[0046] Note that the bonding copper wire 45 according to Embodiment 1 may not be a copper wire, and a bonding wire using another metal may be used instead. Here, another metal wire is a metal different from aluminum, and is a metal wire that can be soldered in the same process as a copper wire when soldering alone. Another metal wire may be, for example, a tin-plated copper wire, a gold wire, or a silver wire.

[0047] Note that the soldering method according to Embodiment 1 may not be a DIP soldering method, and may be, for example, soldering by hand.

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

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

[0050] The process of forming the winding portion 42b will be described. The terminal wire 26 is wound around the end portion on the anti-load side of the connection terminal 411 with a gap at a predetermined interval, as in Embodiment 1. Thereafter, the bonding copper wire 45 is wound around the end portion on the anti-load side of the connection terminal 411. The bonding copper wire 45 is wound with a gap at a predetermined interval in the section where the terminal wire 26 is wound around the connection terminal 411. Specifically, it is wound around the connection terminal 411 so as to intersect with a part overlapping the wound terminal wire 26. As a result, the terminal wire 26 and the bonding copper wire 45 are wound around the end portion on the anti-load side of the connection terminal 411 so as to be arranged to intersect, and the winding portion 42b is formed.

[0051] Even when the terminal wire 26 and the bonding copper wire 45 are wound around the connection terminal 411 so as to be arranged to intersect, the oxide film formed on the surface of the terminal wire core 26a is mechanically broken, and the solder is electrically connected to the aluminum of the terminal wire core 26a. Therefore, it is possible to solder the aluminum wire 10 in the same process as when soldering the copper wire by the DIP soldering method.

[0052] As described above, the stator 20b according to the second embodiment has the terminal wire 26 and the bonding wire wound around so as to be arranged to intersect with each other, so that the aluminum wire 10 (terminal wire core 26a) can be soldered by the DIP soldering method without using flux. Therefore, the number of working hours can be reduced as compared with the case where pretreatment is performed using flux.

[0053] Further, in the stator 20b according to the second embodiment, since the bonding copper wire 45 is arranged to intersect on the terminal wire 26, when soldering, the solder is likely to melt around the bonding copper wire 45. Therefore, when the solder solidifies, the non-uniform stress generated centering on the bonding copper wire 45 increases. As a result, the oxide film formed on the surface of the terminal wire core 26a is likely to be mechanically broken, and the aluminum of the terminal wire core 26a and the solder are electrically connected.

[0054] Note that, in the stator 20b according to the second embodiment, after winding the bonding copper wire 45 around the end portion on the anti-load side of the connection terminal 411, the terminal wire 26 may be wound with a gap at a predetermined interval.

[0055] Note that the configurations shown in the above embodiments are examples of the content of the present disclosure, and it is also possible to combine them with other known technologies. Further, it is also possible to omit or change a part of the configuration without departing from the gist of the present disclosure.

[0056] Hereinafter, various aspects of the present disclosure will be collectively described as appendices. (Appendix 1) A stator core having an annular back yoke portion and a plurality of teeth portions formed so as to project radially inward of 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 having a winding frame insulating portion covering the teeth portion and the back yoke portion and a terminal housing portion housing the connection terminal, and fixed to the stator core, An aluminum wire in which a core wire made of aluminum is covered with an insulating coating, A bonding wire made of a metal different from aluminum, and comprises one end of the connection terminal protrudes from the terminal housing portion, the aluminum wire is wound around the winding frame, and the terminal wire, which is a portion corresponding to the start or end of winding, is wound around the connection terminal with a predetermined gap therebetween, the bonding wire is wound around the connection terminal with a predetermined gap therebetween in a section where the terminal wire is wound around the connection terminal, by soldering the connection terminal, the terminal wire, and the bonding wire, the 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. (Supplementary Note 2) the terminal wire of the aluminum wire and the bonding wire are wound respectively so as to be alternately arranged The stator according to Supplementary Note 1. (Supplementary Note 3) the terminal wire of the aluminum wire and the bonding wire are wound respectively so as to be arranged in a crossed manner The stator according to Supplementary Note 1 or 2. (Supplementary Note 4) the bonding wire is wound so as to be arranged in a crossed manner on the terminal wire of the aluminum wire The stator according to Supplementary Note 3. (Supplementary Note 5) the connection terminal is prismatic The stator according to any one of Supplementary Notes 1 to 4. (Supplementary Note 6) A stator core having an annular back yoke portion and a plurality of teeth portions formed to project radially inward of 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 insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminal, a winding frame fixed to the stator core, an aluminum wire in which a core wire made of aluminum is covered with an insulating coating, and a bonding wire made of a metal different from aluminum, a method for manufacturing a stator, comprising: A first step of press-fitting the connection terminal into the terminal housing portion; A second step of winding the aluminum wire around the winding frame and winding a terminal wire, which is a portion corresponding to the start or end of winding, around the connection terminal with a gap at a predetermined interval; A third step of winding the bonding wire around the connection terminal at a predetermined interval in a section where the terminal wire is wound around the connection terminal; A fourth step of soldering the connection terminal, the terminal wire, and the bonding wire, whereby the 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; A method for manufacturing a stator comprising the above steps. (Appendix 7) A stator, A rotor core rotatably provided on the inner peripheral side of the stator, A shaft press-fitted into the rotor core, Comprising: The stator has A stator core having an annular back yoke portion and a plurality of teeth portions formed to project radially inward of 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 insulating portion covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminal, and a winding frame fixed to the stator core, An aluminum wire in which a core wire made of aluminum is covered with an insulating coating, A bonding wire made of a metal different from aluminum, and comprises one end of the connection terminal protrudes from the terminal housing part, the aluminum wire is wound around the winding frame, and the terminal wire, which is a part corresponding to the start or end of winding, is wound around the connection terminal with a gap of a predetermined interval, the bonding wire is wound around the connection terminal with a gap of a predetermined interval in the section where the terminal wire is wound, By soldering the connection terminal, the terminal wire, and the bonding wire, the 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 tooth part, 21b back yoke part, 22 winding frame, 23 coil, 24 winding frame insulating part, 25 terminal housing part, 26 terminal wire, 26a terminal wire core wire, 26b terminal wire insulating coating, 30 rotor, 31 rotor core, 32 shaft, 42a, 42b winding part, 43a, 43b soldering part, 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 portions formed to project radially inward of 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 having a winding frame insulating portion covering the teeth portion and the back yoke portion and a terminal accommodating portion accommodating the connection terminal, and being fixed to the stator core; An aluminum wire in which a core wire made of aluminum is covered with an insulating coating; A bonding wire made of a metal different from aluminum; Comprising: One end of the connection terminal projects from the terminal accommodating portion; The aluminum wire is wound around the winding frame, and a terminal wire, which is a portion corresponding to the start or end of winding, is wound around the connection terminal with a predetermined gap therebetween; The bonding wire is wound around the connection terminal with a predetermined gap therebetween in a section where the terminal wire is wound around the connection terminal; By soldering the connection terminal, the terminal wire, and the bonding wire, the 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; A stator.

2. The terminal wire of the aluminum wire and the bonding wire are wound so as to be alternately arranged; The stator according to claim 1.

3. The terminal wire of the aluminum wire and the bonding wire are wound so as to be arranged intersectingly; The stator according to claim 1 or 2.

4. The bonding wire is wound so as to be arranged intersectingly on the terminal wire of the aluminum wire; The stator according to claim 3.

5. The connection terminal has a prismatic shape; The stator according to claim 1 or 2.

6. A method for manufacturing a stator, comprising a stator core having an annular back yoke portion and a plurality of teeth portions formed to project radially inward of 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 insulating portion covering the teeth portion and the back yoke portion, a terminal accommodating portion accommodating the connection terminal, and being fixed to the stator core, an aluminum wire in which a core wire having aluminum as a conductor is covered with an insulating coating, and a bonding wire made of a metal different from aluminum, the method comprising: a first step of press-fitting the connection terminal into the terminal accommodating portion; The first step of press-fitting the connection terminal into the terminal accommodating portion; A second step of winding the aluminum wire around the winding frame and winding a terminal wire, which is a portion corresponding to the start or end of winding, around the connection terminal with a gap at a predetermined interval. A third step of winding the bonding wire around the connection terminal with a predetermined interval therebetween in a section where the terminal wire is wound around the connection terminal. A fourth step of soldering the connection terminal, the terminal wire, and the bonding wire, so that the 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. A method for manufacturing a stator comprising the above steps.

7. A stator, A rotor core rotatably provided on the inner peripheral side of the stator, A shaft press-fitted into the rotor core, Comprising: The stator includes: A stator core having an annular back yoke portion and a plurality of teeth portions formed to protrude radially inward of 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 insulator covering the teeth portion and the back yoke portion, and a terminal housing portion for housing the connection terminal, and a winding frame fixed to the stator core. An aluminum wire having a core wire made of aluminum covered with an insulating film, A bonding wire made of a metal different from aluminum, Comprising: One end of the connection terminal protrudes from the terminal housing portion. The aluminum wire is wound around the winding frame, and a terminal wire, which is a portion corresponding to the start or end of winding, is wound around the connection terminal with a gap at a predetermined interval. The bonding wire is wound around the connection terminal with a gap at a predetermined interval in a section where the terminal wire is wound around the connection terminal. By soldering the connection terminal, the terminal wire, and the bonding wire, the 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. A motor.

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