Wiring component for rotary electric machines and manufacturing method thereof

Abstract

To provide a wiring component for rotary electric machines capable of suppressing enlargement by bending a conductor wire even in the vicinity of a tabular connection part which is connected to a coil, and a manufacturing method thereof.SOLUTION: A first bus bar 31 as a wiring component for rotary electric machines connected to an armature coil 221 of a rotary electric machine 2 comprises a conductor wire 31M consisting of a conductive metal and an insulator 31I covering a portion of the conductor wire 31M. The conductor wire 31M includes a tabular connection part 311 connected to the armature coil 221 in one end and a bent part 312, which is bent by bending processing, in the vicinity of the connection part 311. In the connection part 311 and the bent part 312, the conductor wire 31M is not covered by the insulator 31I. A cross-sectional shape of the conductor wire 31M in a cross section vertical to an extension direction of the conductor wire 31M is rectangular in the connection part 311 and circular in the bent part 312.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a wiring component for a rotating electric machine and a method for manufacturing the wiring component for a rotating electric machine. [Background technology]

[0002] Conventionally, the present applicant has proposed wiring components for connecting a winding of a rotating electric machine such as a motor to a terminal block, as described in Patent Documents 1 and 2. These wiring components are formed by subjecting an insulated electric wire, which is made of a conductive metal and has a circular cross section and is covered with an insulator such as enamel, to a predetermined processing, and the insulator is removed to expose the conductor wire at one end connected to the winding and the other end connected to the terminal block. At one end connected to the winding, the conductor wire is crushed and processed into a plate shape. One end of the wiring component processed into a plate shape and the winding are connected by welding such as TIG (Tungsten Inert Gas) welding.

[0003] Moreover, the wiring components described in Patent Documents 1 and 2 are bent at multiple locations so that the windings and the terminal block can be connected while avoiding interference with surrounding members. In the wiring component described in Patent Document 1, the portion covered with the insulator is bent at multiple locations. In the wiring component described in Patent Document 2, the portion covered with the insulator is bent at multiple locations, and the portion formed into a plate shape after the insulator is removed is also bent so as to bend in the plate thickness direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-207827 A [Patent Document 2] JP 2021-13263 A Summary of the Invention [Problem to be solved by the invention]

[0005] When the conductor wire is bent at a portion covered with an insulator, as in the wiring component described in Patent Document 1, the insulator is stretched on the outside of the bent portion. If the winding or the like is welded in this state, if the distance between the welded portion and the bent portion is short, there is a risk that the heat of welding will cause the insulator to become partially thin. For this reason, it is necessary to increase the distance between the welded portion and the bent portion, which poses a problem that the wiring component may become large depending on the positional relationship between the connection position with the winding and the terminal block.

[0006] Furthermore, when bending a portion formed into a plate shape from which the insulator has been removed, as in the wiring component described in Patent Document 2, the portion connected to the winding may become distorted depending on the bending direction, which may cause problems with the connection to the winding. This creates a problem in that restrictions are imposed on the bending direction, which may increase the overall length of the wiring component and result in an increase in size of the wiring component.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a wiring component for a rotating electric machine, which can bend a conductor wire even in the vicinity of a flat connection portion connected to a winding, thereby preventing the component from becoming large, and a manufacturing method thereof. [Means for solving the problem]

[0008] SUMMARY OF THE PRESENT DISCLOSURE The present invention aims to solve the above-mentioned problems and provides a wiring component for a rotating electric machine that is connected to an armature winding of a rotating electric machine, the wiring component having a conductor wire made of a conductive metal and an insulator covering a portion of the conductor wire, the conductor wire having a flat connection portion at one end that is connected to the armature winding and a bent portion that is bent by bending in the vicinity of the connection portion, the conductor wire being not covered by the insulator at the connection portion and the bent portion, and the cross-sectional shape of the conductor wire in a cross section perpendicular to the extension direction of the conductor wire being rectangular at the connection portion and circular at the bent portion.

[0009] Furthermore, in order to solve the above-mentioned problems, the present invention provides a method for manufacturing a wiring component for a rotating electric machine that is connected to an armature winding of a rotating electric machine, the method comprising the steps of: a first step of removing a predetermined length of the insulation at an end of an insulated electric wire made of a conductor wire made of a conductive metal covered with an insulator, a second step of bending the conductor wire from which the insulation has been removed to form a bent portion, and a third step of processing a portion of the conductor wire further towards the tip side than the bent portion into a flat plate to form a connection portion that is connected to the armature winding. Effect of the Invention

[0010] According to the wiring component for a rotating electric machine and the manufacturing method thereof according to the present invention, it is possible to prevent the wiring component for a rotating electric machine from becoming large in size. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a rotating electric machine assembly according to an embodiment of the present invention; [Diagram 2] 1A is a perspective view showing a part of a rotating electric machine assembly before and after a welding process is performed, and FIG. [Diagram 3] FIG. 2 is a configuration diagram of a rotating electric machine assembly and a terminal block as viewed from the side. [Figure 4] 2 is a circuit diagram showing a configuration example of an electric circuit in a rotating electric machine formed by an armature winding. FIG. [Diagram 5] 2 is a perspective view showing one longitudinal end of a first bus bar, and one and the other ends of a U-phase armature winding connected to a connection portion of the first bus bar. FIG. [Figure 6] 4 is a configuration diagram of the first bus bar, showing the periphery of the connection portions and bent portions, as viewed from a direction perpendicular to the connection portions. FIG. [Figure 7] 7(a) to 7(e) are cross-sectional views taken along lines AA, BB, CC, DD and EE in FIG. 6, which are perpendicular to the extending direction of the conductor wires. [Figure 8]1 is an external view showing a state in which a portion of a conductor wire at one end of a first bus bar that is not covered with an insulator is covered with an electrically insulating covering material. FIG. [Figure 9] 5(a) to 5(d) are explanatory views showing a method for manufacturing the first bus bar. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [Embodiment Mode] Fig. 1 is a perspective view showing a rotating electric machine assembly 1 having a wiring component for a rotating electric machine according to an embodiment of the present invention, together with a terminal block 4. Fig. 2(a) is a perspective view showing a part of the rotating electric machine assembly 1 before a welding process is performed. Fig. 2(b) is a perspective view showing a part of the rotating electric machine assembly 1 after a welding process is performed. Fig. 3 is a configuration diagram of the rotating electric machine assembly 1 and the terminal block 4 as viewed from the side.

[0013] The rotating electric machine assembly 1 includes a rotating electric machine 2 and a busbar unit 3 having first to third busbars 31 to 33 as a plurality of wiring components for the rotating electric machine. In Fig. 3, a part of the rotating electric machine 2 is cut away to show its internal structure.

[0014] The rotating electric machine 2 is mounted on a vehicle as a driving source for running and a generator for generating electricity during regenerative braking, and is connected to an inverter (not shown) via a bus bar unit 3 and a terminal block 4. The rotating electric machine 2 is a three-phase motor, and armature windings 221-223 (described later) and first to third washers 41-43 of the terminal block 4 are electrically connected by the bus bar unit 3.

[0015] The rotating motor 2 has a cylindrical case 21 with a bottom, an armature 22 which is a stator fixed to the inside of the case 21, a rotor 23 arranged inside the armature 22, a shaft 24 which passes through the center of the rotor 23 and is supported so as to be rotatable integrally with the rotor 23, and a disk-shaped cover member 25 made of molded resin which covers the opening of the case 21.

[0016] In the armature 22, U-phase, V-phase, and W-phase armature windings 221-223 are wound around an armature core 220, which is an annular iron core surrounding the rotor 23. More specifically, any of the U-phase, V-phase, and W-phase windings 221-223 is wound around each of a plurality of teeth provided on the armature core 220. The armature core 220 is made of a magnetic material such as steel. The armature windings 221-223 are rectangular insulated electric wires with a rectangular cross section. The armature windings 221-223 are partially exposed to the outside of the case 21 from the cover member 25 and are molded into the cover member 25.

[0017] The rotor 23 has a cylindrical rotor core 231 with a through hole formed therein for inserting the shaft 24 therethrough, and a plurality of magnets 232 arranged on the outer periphery of the rotor core 231. The magnets 232 are provided with magnetic poles such that S poles and N poles are alternately positioned along the circumferential direction of the rotor core 231. The shaft 24 is rotatably supported by the case 21 via a bearing (not shown), and rotates about a rotation axis O.

[0018] 4 is a circuit diagram showing a configuration example of an electric circuit in the rotating electric machine 2 formed by the armature windings 221 to 223. The U-phase armature winding 221, the V-phase armature winding 222, and the W-phase armature winding 223 are each wound around the armature core 220 at multiple locations (six locations in the example shown in FIG. 4) to form a coil, and are connected to a neutral point 22n at the center of each. A U-phase current is supplied to one end 221a and the other end 221b of the U-phase armature winding 221. A V-phase current is supplied to one end 222a and the other end 222b of the V-phase armature winding 222. A W-phase current is supplied to one end 223a and the other end 223b of the W-phase armature winding 223.

[0019] One end 221a and the other end 221b of the U-phase armature winding 221, one end 222a and the other end 222b of the V-phase armature winding 222, and one end 223a and the other end 223b of the W-phase armature winding 223 are arranged in parallel to each other at a predetermined interval, and protrude to the outside from the cover member 25. One end 221a and the other end 221b of the U-phase armature winding 221, one end 222a and the other end 222b of the V-phase armature winding 222, and one end 223a and the other end 223b of the W-phase armature winding 223 protrude from the peripheral edge of the cover member 25 parallel to the rotation axis O, and are aligned in a predetermined arrangement direction along the circumferential direction of the case 21.

[0020] The busbar unit 3 has first to third busbars 31 to 33, first to third connection terminals 34 to 36 attached to the first to third busbars 31 to 33, respectively, and a resin busbar holder 37 that holds the first to third busbars 31 to 33. The busbar holder 37 is made of a molded body. The first to third busbars 31 to 33 are each a linear wiring component for a rotating electric machine.

[0021] The first to third bus bars 31 to 33 each have a conductor wire 31M, 32M, 33M made of a highly conductive metal such as a copper alloy, and an insulator 31I, 32I, 33I made of an insulating material such as enamel. At both ends in the longitudinal direction of the first to third bus bars 31 to 33, the insulator 31I, 32I, 33I is removed to expose the conductor wire 31M, 32M, 33M. The conductor wire 31M, 32M, 33M in the portion covered with the insulator 31I, 32I, 33I has a circular cross section. The first to third bus bars 31 to 33 are bent at a plurality of points in the portion where the conductor wire 31M, 32M, 33M is covered with the insulator 31I, 32I, 33I.

[0022] The first busbar 31 has a flat connection portion 311 at one end thereof, which is connected to one end 221a and the other end 221b of the U-phase armature winding 221 of the rotating electric machine 2 by welding, and has a bent portion 312 bent by bending near the connection portion 311. The connection portion 311 extends in an extension direction along the arrangement direction of the one end 221a and the other end 221b of the U-phase armature winding 221, and the one end 221a and the other end 221b of the U-phase armature winding 221 are welded to different positions in the extension direction of the connection portion 311. This welding can be performed by, for example, TIG welding or laser welding. A first connection terminal 34 is welded or crimped to the other end of the first busbar 31.

[0023] The second busbar 32 has, at one end, a flat connection portion 321 connected by welding to both one end 222a and the other end 222b of the V-phase armature winding 222 of the rotating electric machine 2, and has a bent portion 322 bent by bending near the connection portion 321. The connection portion 321 extends in an extension direction along the arrangement direction of the one end 222a and the other end 222b of the V-phase armature winding 222, and the one end 222a and the other end 222b of the V-phase armature winding 222 are welded to different positions in the extension direction of the connection portion 321. A second connection terminal 35 is welded or crimped to the other end of the second busbar 32.

[0024] The third busbar 33 has, at one end, a flat connection portion 331 connected by welding to both one end 223a and the other end 223b of the W-phase armature winding 223 of the rotating electric machine 2, and has a bent portion 332 bent by bending near the connection portion 331. The connection portion 331 extends in an extension direction along the arrangement direction of the one end 223a and the other end 223b of the W-phase armature winding 223, and the one end 223a and the other end 223b of the W-phase armature winding 223 are welded to different positions in the extension direction of the connection portion 331. A third connection terminal 36 is welded or crimped to the other end of the third busbar 33.

[0025] The first connection terminal 34 is connected to a first washer 41 of the terminal block 4, the second connection terminal 35 is connected to a second washer 42 of the terminal block 4, and the third connection terminal 36 is connected to a third washer 43 of the terminal block 4 by bolts 44, 45, and 46, respectively. The first to third washers 41, 42, and 43 are connected to the inverter by wiring (not shown).

[0026] 5 is a perspective view showing one longitudinal end of the first bus bar 31, and one end 221a and the other end 221b of the U-phase armature winding 221 connected to the connection portion 311 of the first bus bar 31. In FIG. 5, the extension direction and arrangement direction of the one end 221a and the other end 221b of the U-phase armature winding 221 are indicated by double-headed arrows. In this embodiment, the extension direction of the one end 221a and the other end 221b of the armature winding 221 is parallel to the rotation axis O of the shaft 24. The arrangement direction of the one end 221a and the other end 221b of the armature winding 221 is the circumferential direction centered on the rotation axis O. The armature winding 221 has an insulating coating layer 221I made of enamel formed on the outer surface of a conductor 221M made of a copper alloy, and at the portion connected to the connection portion 311 of the first bus bar 31, the insulating coating layer 221I is removed to expose the conductor 221M.

[0027] Fig. 6 is a configuration diagram of first busbar 31, showing the periphery of connection portion 311 and bent portion 312, as viewed from a direction perpendicular to connection portion 311. In Fig. 6, bent portion 312 of first busbar 31 is shown in gray, and central axis C of conductor wire 31M is shown by a dashed dotted line. In the following description, the extension direction of conductor wire 31M refers to the direction along central axis C.

[0028] At the connection portion 311 and the bent portion 312 of the first busbar 31, the conductor wire 31M is not covered with the insulator 31I. The shape of the connection portion 311 as viewed from the side of the one end 221a and the other end 221b of the armature winding 221 to be connected is a rectangle whose long side is in the arrangement direction of the one end 221a and the other end 221b. The connection portion 311 is disposed so as to face the side surfaces of the ends 221a, 221b of the armature winding 221 along a direction perpendicular to the extension direction and arrangement direction of the ends 221a, 221b of the armature winding 221.

[0029] The first bus bar 31 has a straight portion 313 that is continuous with the bent portion 312 and extends in the extension direction of one end 221a and the other end 221b of the armature winding 221. In the straight portion 313, a part on the bent portion 312 side is not covered with the insulator 31I, and the other part is covered with the insulator 31I. In other words, the insulator 31I covers the outer circumferential surface of the conductor wire 31M at a position farther from the connection portion 311 than the bent portion 312 in the extension direction of the conductor wire 31M.

[0030] Furthermore, first busbar 31 has, between connecting portion 311 and bending portion 312, gradual change portion 314 whose cross-sectional shape in a cross section perpendicular to central axis C gradually changes, and extending portion 315 extending parallel to the longitudinal direction of connecting portion 311. Gradual change portion 314 is formed continuously with connecting portion 311. Extending portion 315 is formed continuously with bending portion 312 and gradual change portion 314. Note that first busbar 31 may not have extending portion 315, and gradual change portion 314 may be formed continuously with connecting portion 311 and bending portion 312.

[0031] If the distance between connection portion 311 and bent portion 312 in the extension direction of conductor wire 31M is D1 and the length of connection portion 311 in the longitudinal direction is L1, D1 is shorter than L1. This reduces the length of first busbar 31 to reduce the size of first busbar 31, and also makes it easier to avoid interference between first to third busbars 31 to 33 when ends 221a, 221b, 222a, 222b, 223a, 223b of armature windings 221, 222, 223 of each phase are arranged side by side in the circumferential direction of case 21 as shown in Figures 1 and 2.

[0032] At the bent portion 312, the conductor wire 31M is bent at a right angle to the short side direction of the connection portion 311 with respect to the connection portion 311. That is, in the portion (the connection portion 311, the gradual change portion 314, and the extending portion 315) on the tip side of the first bus bar 31 from the bent portion 312, the central axis C of the conductor wire 31M is parallel to the arrangement direction of the one end 221a and the other end 221b of the armature winding 221, and at the straight portion 313, the central axis C of the conductor wire 31M is parallel to the extension direction of the one end 221a and the other end 221b of the armature winding 221. However, the angle of bending at the bent portion 312 is not limited to a right angle (90°) and may be an obtuse angle or an acute angle.

[0033] Figures 7(a) to (e) are cross-sectional views taken along lines AA, BB, CC, DD, and EE in Figure 6, which are perpendicular to the extension direction of conductor wire 31M. Figure 7(a) shows a cross-section of connection portion 311, Figure 7(b) shows a cross-section of gradual-change portion 314, Figure 7(c) shows a cross-section of extension portion 315, Figure 7(d) shows a cross-section of bent portion 312, and Figure 7(e) shows a cross-section of straight portion 313.

[0034] The cross-sectional shape of conductor wire 31M in a cross section perpendicular to the extension direction of conductor wire 31M is a rectangle that is long in the extension direction of one end 221a and the other end 221b of armature winding 221 at connection portion 311, and is circular at extension portion 315, bent portion 312, and straight portion 313. The cross-sectional shape of gradual change portion 314 gradually changes from a rectangular shape to a circular shape as it approaches bent portion 312 from connection portion 311. Note that the cross-sectional shape of bent portion 312 is not limited to a perfect circle, and may be a slightly distorted circle due to plastic deformation during bending.

[0035] 8 is an external view showing a state in which a portion of the conductor wire 31M at one end of the first busbar 31 that is not covered with the insulator 31I, i.e., the connection portion 311, the gradual change portion 314, the extension portion 315, the bent portion 312, and part of the straight portion 313, together with one end 221a and the other end 221b of the armature winding 221, are covered with an electrically insulating coating material 5. In FIG. 8, the coating material 5 is shown in gray, and the first busbar 31 and one end 221a and the other end 221b of the armature winding 221 that are covered with the coating material 5 are shown by dashed lines. The coating material 5 is formed in an area that covers the insulator 31I of the first busbar 31 and part of the insulating coating layer 221I of the armature winding 221.

[0036] The process of forming the coating material 5 can be performed by, for example, powder coating. In this case, the cover member 25 from which one end 221a and the other end 221b of the armature winding 221 protrude is faced vertically downward, and the connection portion 311 and the like are immersed in a powder fluidization tank in which insulating powder is flowing while being heated, to melt the insulating powder. The coating material 5 may be formed by, for example, electrodeposition coating, instead of powder coating. The coating material 5 is formed not only on the first bus bar 31, but also on the second bus bar 32 and the third bus bar 33 in the same manner.

[0037] 6, if the distance in the extension direction of the conductor wire 31M from the bent portion 312 to the portion where the straight portion 313 is covered with the insulator 31I is D2, that is, the distance along the extension direction between the bent portion 312 and the insulator 31I, D2 is shorter than D1. This makes it possible to shorten the formation area of ​​the covering material 5 in the extension direction of the one end 221a and the other end 221b of the armature winding 221, and makes it easy to form the covering material 5.

[0038] Next, an example of a manufacturing method for the first busbar 31 will be described with reference to Figures 9(a) to (d). Figure 9(a) is a perspective view showing one end of a material wire 30 which is the material for the first busbar 31. The material wire 30 is an insulated electric wire in which a conductor wire 301 made of a conductive metal is covered with an insulator 302, and is cut to match the length of the first busbar 31 which is the finished product, and shaped into a straight line.

[0039] The first busbar 31 is manufactured by a manufacturing method including a first step of removing a predetermined length of the insulator 302 at the end of the material wire 30, a second step of bending the conductor wire 301 at the portion from which the insulator 302 has been removed to form a bent portion 312, and a third step of processing a portion of the conductor wire 301 further towards the tip side than the bent portion 312 into a flat plate to form a connection portion 311.

[0040] 9(b) is a perspective view showing the wire material 30 after the first process step. The length of the insulator 302 to be removed in the first process step is the length of the connection portion 311, the gradually changing portion 314, the extension portion 315, and the bent portion 312 in the extension direction of the conductor wire 31M of the first busbar 31 plus the above-mentioned distance D2.

[0041] 9(c) is an explanatory diagram showing the second step. In the second step, a cylindrical jig 6 having a radius corresponding to the radius of curvature of the inner portion of the bend in the bent portion 312 is used to bend and plastically deform the conductor wire 301 along the outer circumferential surface 6a of the jig 6, thereby forming the bent portion 312. Here, the distance D1 (see FIG. 6) between the connection portion 311 and the bent portion 312 in the extension direction of the conductor wire 31M in the first busbar 31 is, for example, three times or less, more preferably two times or less, the diameter of the conductor wire 301 in the material wire 30. In the example shown in FIG. 9(c), this ratio is two times. The diameter of the conductor wire 301 is the same as the diameter of the conductor wire 31M in the straight portion 313 of the first busbar 31.

[0042] Fig. 9(d) is an explanatory diagram showing the third step. In the third step, the tip of the conductor wire 301 is pressed and crushed to form the connection part 311. In the example shown in Fig. 9(d), a die 7 having a lower die 71 and an upper die 72 is used, and the conductor wire 301 is sandwiched between the lower die 71 and the upper die 72 and crushed to form the connection part 311 and the gradual change part 314. The lower die 71 and the upper die 72 are formed with holding grooves 711, 721 for holding the bent part 312 and a part of the straight part 313 formed in the second step.

[0043] After forming the bent portions 312 in the second step, the connection portions 311 are formed in a state in which the bent portions 312 are held by the lower die 71 and the upper die 72 in the third step, thereby improving the shape accuracy of the first busbar 31. In other words, if the connection portions 311 are formed first and then the conductor wire 301 is bent to form the bent portions 312, the angle of the straight portions 313 relative to the connection portions 311 is likely to be shifted when the conductor wire 301 is bent, and there is a risk that the connection portions 311 will not directly face the one end 221a and the other end 221b of the armature winding 221 when the busbar unit 3 is combined with the rotating electric machine 2. However, according to this embodiment, the relative angles of the straight portions 313 and the connection portions 311 before and after the bent portions 312 can be aligned with high accuracy.

[0044] The second bus bar 32 and the third bus bar 33 are also manufactured by the same manufacturing method as that for the first bus bar 31.

[0045] (Effects of the embodiment) According to the embodiment described above, it is possible to bend conductor wire 31M near connection portion 311 while maintaining the shape accuracy of first bus bar 31, and to prevent first bus bar 31 from becoming large. The same applies to second bus bar 32 and third bus bar 33.

[0046] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiment will be described by using the reference numerals and the like in the embodiment. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiment.

[0047] [1] A wiring component for a rotating electric machine (first bus bar 31) connected to an armature winding (221) of a rotating electric machine (2), the wiring component for a rotating electric machine (31) comprising: a conductor wire (31M) made of a conductive metal; and an insulator (31I) covering a portion of the conductor wire (31M), the conductor wire (31M) having a flat connection portion (311) connected to the armature winding (221) at one end and a bent portion (312) bent by bending processing in the vicinity of the connection portion (311), the conductor wire (31M) being not covered by the insulator (31I) at the connection portion (311) and the bent portion (312), and a cross-sectional shape of the conductor wire (31M) in a cross section perpendicular to an extension direction of the conductor wire (31M) is rectangular at the connection portion (311) and is circular at the bent portion (312).

[0048] [2] The wiring component (31) for a rotating electric machine described in [1] above, wherein the connection portion (311) has a rectangular shape when viewed from the side of the armature winding (221) to be connected, and the conductor wire (31M) is bent in the short direction of the connection portion (311) at the bend portion (312) relative to the connection portion (311).

[0049] [3] The wiring component (31) for a rotating electric machine according to the above [2], wherein a plurality of ends (221a, 221b) of the armature winding (221) are connected to the connection portion (311), and a distance (D1) between the connection portion (311) and the bent portion (312) is shorter than a longitudinal length (L1) of the connection portion (311).

[0050] [4] The wiring component (31) for a rotating electric machine according to any one of [1] to [3] above, wherein the insulator (31I) covers an outer surface of the conductor wire (31M) at a position farther from the connection portion (311) than the bent portion (312) in the extension direction, and a distance (D2) between the bent portion (312) and the insulator (31I) along the extension direction is shorter than a distance (D1) between the connection portion (311) and the bent portion (312).

[0051] [5] A manufacturing method of a wiring component (31) for a rotating electric machine that is connected to an armature winding (221) of a rotating electric machine (2), the manufacturing method comprising the steps of: a first step of removing a predetermined length of the insulator (302) at an end of an insulated electric wire (base wire 30) made of a conductor wire (301) made of a conductive metal covered with an insulator (302) at an end of the base wire; a second step of bending the conductor wire (301) at the portion from which the insulator (302) has been removed to form a bent portion (312); and a third step of processing a portion of the conductor wire (301) on the tip side of the bent portion (312) into a flat plate shape to form a connection portion (311) that is connected to the armature winding (221).

[0052] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above embodiments. It should be noted that not all of the combinations of features described in the embodiments are essential to the means for solving the problems of the invention. [Explanation of symbols]

[0053] 2...Rotary electric machine 221, 222, 223...Armature windings 221a, 221b, 222a, 222b, 223a, 223b...end 30…Material wire 301…Conductor wire 302...Insulator 31 to 33: First to third bus bars 311, 321, 331…Connections 312, 322, 332…Bends 31I, 32I, 33I...Insulators 31M, 32M, 33M...Conductor wire 34 to 36: First to third connection terminals

Claims

1. A wiring component for a rotating electric machine that is connected to an armature winding of a rotating electric machine, A conductor wire made of a conductive metal and an insulator covering a part of the conductor wire, the conductor wire has a flat connection portion at one end thereof that is connected to the armature winding, and a bent portion that is bent by bending in the vicinity of the connection portion, the conductor wire is not covered with the insulator at the connection portion and the bent portion, a cross-sectional shape of the conductor wire in a cross section perpendicular to an extension direction of the conductor wire is rectangular at the connection portion and circular at the bent portion; Wiring components for rotating electrical machines.

2. the connection portion has a rectangular shape when viewed from the armature winding side to be connected, The conductor wire is bent at the bent portion in a short direction of the connection portion with respect to the connection portion. The wiring component for a rotating electric machine according to claim 1 .

3. A plurality of ends of the armature winding are connected to the connection portion, The distance between the connection portion and the bent portion is shorter than the length of the connection portion in the longitudinal direction. The wiring component for a rotating electric machine according to claim 2 .

4. the insulator covers an outer circumferential surface of the conductor wire at a position farther from the connection portion than the bent portion in the extension direction, a distance between the bent portion and the insulator along the extension direction is shorter than a distance between the connection portion and the bent portion; The wiring component for a rotating electric machine according to any one of claims 1 to 3.

5. A method for manufacturing a wiring component for a rotating electric machine that is connected to an armature winding of the rotating electric machine, comprising the steps of: The material is an insulated wire made by covering a conductor wire made of conductive metal with an insulator, a first step of removing a length of the insulation at an end of the blank; a second step of bending the conductor wire at the portion from which the insulation has been removed to form a bent portion; a third step of forming a connection portion to be connected to the armature winding by processing a part of the conductor wire on a tip side of the bent portion into a flat plate shape; A method for manufacturing a wiring component for a rotating electric machine comprising the steps of:

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