Collecting and distributing ring

Abstract

To provide a collecting and distributing ring which has no need to use a terminal block with a special shape and can be miniaturized while suppressing an increase in costs.SOLUTION: A collecting and distributing ring 112 includes: first to third bus rings 51-53 respectively connected to multi-phase armature windings 31-33; a holding member 6 holding the first to third bus rings 51-53; and a plurality of connection terminals 71-73 respectively attached to the first to third bus rings 51-53. The plurality of connection terminals 71-73 are respectively caulked to caulked portions 512, 522, 532 of the respective first to third bus rings 51-53. In the first and third bus rings 51, 53, portions near the respective caulked portions 512, 532 are tilted relative to an axial direction, and, by the inclination, the axial positions of the caulked portions 512, 532 of the respective first and third bus rings 51, 53 are aligned with the axial position of the caulked portion 522 of the second bus ring 52.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a power collection and distribution ring that collects and distributes current to armature windings of multiple phases wound around multiple teeth of an armature core. [Background technology]

[0002] The applicant has previously proposed a power collection and distribution ring described in Patent Document 1 and a centralized power distribution member described in Patent Document 2 as means for collecting and distributing multiple phase currents to the stator windings of electric motors used as drive sources for electric vehicles and hybrid vehicles, for example.

[0003] The power collection and distribution ring described in Patent Document 1 includes first to third bus rings connected to U-phase, V-phase, and W-phase windings, respectively, for each current phase; a holding member for holding the first to third bus rings; and first to third power feed terminals for connecting the first to third bus rings to a terminal block, respectively. The first to third bus rings have an annular portion formed in an annular shape and a connection portion extending from the annular portion along an axial direction parallel to the rotational axis of the rotor. The first to third power feed terminals are attached to the tip ends of the connection portions of the first to third bus rings, respectively. The holding member holds the first to third bus rings so that the annular portions are aligned in the axial direction. The connection portions of the first to third bus rings have different axial lengths, and these differences in length ensure that the axial positions of the connection pieces of the first to third power feed terminals connected to the terminal block are uniform.

[0004] The centralized power distribution member described in Patent Document 2 includes three circular annular conductors connected to U-phase, V-phase, and W-phase windings, respectively, for each current phase; a holding member for holding the three annular conductors; and three power supply terminals connected to each of the three annular conductors. The three annular conductors are held by the holding member and aligned in the axial direction. The three power supply terminals each have a plate-shaped main body and a J-shaped connecting piece. The connecting piece is connected to each of the three annular conductors at a single point in the circumferential direction, and the main body is located radially outward of the connecting piece for each of the three annular conductors. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2015 / 083230 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-175721 Summary of the Invention [Problem to be solved by the invention]

[0006] In the device described in Patent Document 1, the connection portions of the first to third bus rings extend axially from the annular portion, resulting in an increase in the axial size of the power collection and distribution ring. On the other hand, in the device described in Patent Document 2, the three power feed terminals are attached so as to be aligned radially of the three annular conductors, making it possible to make the power collection and distribution ring smaller than that described in Patent Document 1. However, the axial positions of the three power feed terminals are shifted depending on the positions of the three annular conductors. For this reason, the terminal block to which the three power feed terminals of the centralized power distribution member described in Patent Document 2 are connected must have a special shape in which the positions of the electrodes that contact the main bodies of the three power feed terminals have a stepped structure, which increases costs.

[0007] Therefore, an object of the present invention is to provide a power collection and distribution ring that does not require the use of a specially shaped terminal block, and that can be made smaller while suppressing increases in costs. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides an electric power collection and distribution ring that electrically connects multiple phase armature windings wound around multiple teeth of an armature core having multiple teeth to multiple electrodes of a terminal block, the electric power collection and distribution ring comprising: multiple bus rings connected to each of the multiple phase armature windings for each current phase; a holding member that holds the multiple bus rings; and multiple connection terminals attached to each of the multiple bus rings, each of the multiple connection terminals having a crimped portion crimped to a crimped portion of each of the multiple bus rings and a terminal block connection portion that is connected to the electrode of the terminal block, the multiple bus rings being held by the holding member in a line along the axial direction, and portions of the multiple bus rings except for one bus ring being inclined with respect to the axial direction near the crimped portion, and this inclination aligns the axial position of the crimped portion of the other bus rings with the axial position of the crimped portion of the one bus ring. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide an electricity collection and distribution ring that can be made smaller while suppressing increases in cost. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram illustrating a configuration example of an electric motor according to an embodiment of the present invention; [Figure 2] FIG. 2 is an external perspective view showing a stator of the electric motor. [Figure 3] FIG. 2 is a configuration diagram of the stator as viewed from the axial direction. [Figure 4] FIG. [Figure 5] (a) is a configuration diagram of a first bus ring as viewed from the axial direction, (b) is a configuration diagram of a second bus ring as viewed from the axial direction, and (c) is a configuration diagram of a third bus ring as viewed from the axial direction. [Figure 6] 1(a) is a perspective view of a holding member, and FIG. 1(b) is a perspective cross-sectional view taken along line AA in FIG. [Figure 7] FIG. 2 is a perspective view of a core member, an insulating member, and a holding member. [Figure 8] (a) is a diagram showing the first bus ring together with the connection terminals as viewed from the radial direction, (b) is a diagram showing the second bus ring together with the connection terminals as viewed from the radial direction, and (c) is a diagram showing the third bus ring together with the connection terminals as viewed from the radial direction. [Figure 9] 1A is a perspective view showing a power collection and distribution ring, FIG. 1B is a configuration diagram of the power collection and distribution ring viewed in the radial direction, and FIG. 1C is an explanatory diagram showing a portion of the first to third bus rings in FIG. 1B. [Figure 10] 10 is an explanatory diagram showing a first modification of the power collection and distribution ring in which the protruding portions of the second bus ring and the third bus ring are inclined. FIG. [Figure 11] 10 is an explanatory diagram showing a second modification of the electricity collection and distribution ring in which the protruding portions of the first bus ring and the second bus ring are inclined. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Embodiment Mode] Fig. 1 is a schematic diagram showing an example of the configuration of an electric motor according to an embodiment of the present invention. Fig. 2 is an external perspective view showing a stator of the electric motor. Fig. 3 is a configuration diagram of the stator as seen from the axial direction. Fig. 4 is an exploded perspective view of the stator. This electric motor 1 is mounted on a vehicle such as an electric vehicle or a so-called hybrid vehicle, and is used as a drive source for rotating wheels.

[0012] The electric motor 1 has a stator 11, a rotor 12 arranged inside the stator 11, and an output rotating shaft 13 inserted through the center of the rotor 12. The rotor 12 has a core 121 made of a magnetic metal and a plurality of magnets 122 fixed to the core 121. The rotor 12 and the output rotating shaft 13 rotate integrally with the stator 11 around a rotation axis O. In the following description, the axial direction refers to a direction parallel to the rotation axis O, and the radial direction refers to a direction perpendicular to the rotation axis O. Furthermore, the circumferential direction refers to a direction perpendicular to the axial and radial directions.

[0013] 1, stator 11 includes an armature core 2 having a plurality of teeth 21, multi-phase armature windings 31-33 wound around each of the plurality of teeth 21, insulating members 4 interposed between the teeth 21 and the armature windings 31-33, a plurality of bus rings 51-53 connected to the multi-phase armature windings 31-33 for each current phase, a neutral-phase bus ring 54, a plurality of holding members 6 (see FIGS. 2 to 4) that hold the bus rings 51-53, and a plurality of connection terminals 71-73. Of these, armature core 2, armature windings 31-33, and insulating member 4 form an armature 111. Furthermore, the plurality of bus rings 51-53, the plurality of holding members 6, and the plurality of connection terminals 71-73 form a power collection and distribution ring 112 that collects and distributes power to and from the multi-phase armature windings 31-33.

[0014] In this embodiment, the electric motor 1 is a three-phase AC motor, and three-phase AC current is supplied from an inverter (not shown) to the multiple-phase armature windings 31-33 via a terminal block 8 and a power collection and distribution ring 112. As shown in FIG. 3 , the terminal block 8 is arranged on the outer periphery of the power collection and distribution ring 112, radially aligned with the multiple bus rings 51-53. The terminal block 8 has a resin terminal block body 80 and terminal block electrodes 81-83 to which the multiple connection terminals 71-73 are respectively connected. The power collection and distribution ring 112 electrically connects the multiple-phase armature windings 31-33 and the terminal block electrodes 81-83. The terminal block electrodes 81-83 are uniformly positioned in the axial direction.

[0015] Hereinafter, the armature windings 31 to 33 are referred to as the first to third armature windings 31 to 33. The bus ring 51 connected to the first armature winding 31 is referred to as the first bus ring 51, the bus ring 52 connected to the second armature winding 32 is referred to as the second bus ring 52, and the bus ring 53 connected to the third armature winding 33 is referred to as the third bus ring 53. The second bus ring 52 is disposed between the first bus ring 51 and the third bus ring 53.

[0016] The armature 111 has a plurality of first armature windings 31, a plurality of second armature windings 32, and a plurality of third armature windings 33. In this embodiment, the number of the first armature windings 31, the second armature windings 32, and the third armature windings 33 is four each. As shown in FIG. 4 , the first to third bus rings 51 to 53 are formed by bending a single insulated wire in which a linear central conductor (metal conductor) 501 made of a metal with good conductivity such as copper is partially coated with an insulator 502 made of resin. The central conductor 501 is a solid wire with a circular cross section. The insulator 502 is, for example, enamel baked onto the central conductor 501, or a tubular body made of insulating resin such as fluororesin.

[0017] A U-phase current is supplied to the first armature winding 31 from the first bus ring 51, and a V-phase current that is 120° out of phase with the U-phase current is supplied to the second armature winding 32 from the second bus ring 52. A W-phase current that is 240° out of phase with the U-phase current is supplied to the third armature winding 33 from the third bus ring 53. The rotor 12 rotates relative to the stator 11 due to a rotating magnetic field generated by the U-phase, V-phase, and W-phase currents flowing through the first to third armature windings 31 to 33.

[0018] 1, of both ends of the first armature winding 31, one end 311 is electrically connected to the first bus ring 51, and the other end 312 is electrically connected to the neutral phase bus ring 54. Of both ends of the second armature winding 32, one end 321 is electrically connected to the second bus ring 52, and the other end 322 is electrically connected to the neutral phase bus ring 54. Furthermore, of both ends of the third armature winding 33, one end 331 is electrically connected to the third bus ring 53, and the other end 332 is electrically connected to the neutral phase bus ring 54.

[0019] 5(a) is a configuration diagram of first bus ring 51 as viewed from the axial direction. First bus ring 51 has an annular portion 511 having an annular shape centered on rotation axis O, crimped portions 512 formed radially outward from annular portion 511 and to which connection terminals 71 are crimped, protruding portions 513 protruding radially outward from annular portion 511 and connecting annular portion 511 and crimped portion 512, and a plurality of winding connection portions 514 formed radially inward of annular portion 511 and to which one end portion 311 of each of a plurality of first armature windings 31 is connected. Annular portion 511 is curved in an arc shape between two circumferentially adjacent winding connection portions 514 and between winding connection portion 514 and protruding portion 513.

[0020] 5(b) is a configuration diagram of second bus ring 52 as viewed from the axial direction. Second bus ring 52 has an annular portion 521 having an annular shape centered on rotation axis O, crimped portions 522 formed radially outward from annular portion 521 and to which connection terminals 72 are crimped, protruding portions 523 protruding radially outward from annular portion 521 and connecting annular portion 521 and crimped portion 522, and a plurality of winding connection portions 524 formed radially inward of annular portion 521 and to which one end portion 321 of each of a plurality of second armature windings 32 is connected. Annular portion 521 is curved in an arc shape between two circumferentially adjacent winding connection portions 524 and between winding connection portion 524 and protruding portion 523.

[0021] 5(c) is a configuration diagram of third bus ring 53 as viewed from the axial direction. Third bus ring 53 has an annular portion 531 having an annular shape centered on rotation axis O, crimped portions 532 formed radially outward of annular portion 531 and to which connection terminals 73 are crimped, protruding portions 533 protruding radially outward from annular portion 531 and connecting annular portion 531 and crimped portion 532, and a plurality of winding connection portions 534 formed radially inward of annular portion 531 and to which one end portion 331 of each of a plurality of third armature windings 33 is connected. Annular portion 531 is curved in an arc shape between two circumferentially adjacent winding connection portions 534 and between winding connection portions 534 and protruding portions 533.

[0022] At crimped portions 512, 522, 532 of first to third bus rings 51 to 53, both ends of central conductor 501 face each other, and both ends of central conductor 501 are crimped to connection terminals 71 to 73. Protrusions 513, 523, 533 correspond to portions near crimped portions 512, 522, 532 of first to third bus rings 51 to 53, and are provided on both sides of crimped portions 512, 522, 532 in the circumferential direction.

[0023] In the present embodiment, insulator 502 is removed from the entire protruding portions 513, 523, 533 and crimped portions 512, 522, 532 of first to third bus rings 51 to 53 to expose central conductor 501, but part of central conductor 501 on the annular portions 511, 521, 531 side of protruding portions 513, 523, 533 may be covered with insulator 502. In this manner, discharge between first to third bus rings 51 to 53 can be suppressed, and insulator 502 increases the rigidity of protruding portions 513, 523, 533.

[0024] 5(a) to 5(c), when viewed in the axial direction of first to third bus rings 51 to 53, protruding portions 513, 523, 533 are inclined with respect to the radial direction of annular portions 511, 521, 531, and the angles formed by protruding portions 513, 523, 533 and crimped portions 512, 522, 532 are obtuse angles. However, protruding portions 513, 523, 533 and crimped portions 512, 522, 532 may form right angles.

[0025] Annular portions 511, 521, and 531 of first to third bus rings 51 to 53 have the same diameter and are arranged side by side along the axial direction of armature core 2 on one axial side of armature core 2, as shown in FIG. 4 . Annular portion 521 of second bus ring 52 is arranged between annular portion 511 of first bus ring 51 and annular portion 531 of third bus ring 51. Annular portion 531 of third bus ring 53 is arranged closer to armature core 2 than annular portion 521 of second bus ring 52. Annular portion 511 of first bus ring 51 is arranged farther from armature core 2 than annular portion 521 of second bus ring 52.

[0026] In annular portions 511, 521, and 531 of first to third bus rings 51 to 53, central conductor 501 is covered with insulator 502. Insulator 502 is removed from crimped portions 512, 522, and 532, protruding portions 513, 523, and 533, and winding connection portions 514, 524, and 534, so that central conductor 501 is exposed.

[0027] One end portion 311, 321, 331 of each of the first to third armature windings 31 to 33 is electrically and mechanically connected to the winding connection portions 514, 524, 534 by thermal crimping (fusing). Note that the connection between the winding connection portions 514, 524, 534 and one end portion 311, 321, 331 of each of the first to third armature windings 31 to 33 may be performed by, for example, soldering or laser welding, rather than by thermal crimping.

[0028] The plurality of holding members 6 are arranged side by side in the circumferential direction of annular portions 511, 521, 531 of first to third bus rings 51 to 53. In the present embodiment, power collection and distribution ring 112 has twelve holding members 6, which are arranged between the plurality of winding connection portions 514, 524, 534 of first to third bus rings 51 to 53, respectively. The holding members 6 are made of resin and formed by injection molding. The twelve holding members 6 have the same shape and size.

[0029] FIG. 6(a) is a perspective view of the holding member 6. FIG. 6(b) is a perspective cross-sectional view taken along line AA in FIG. 6(a). The holding member 6 is formed with a holding portion 60 that holds the first to third bus rings 51 to 53. The holding portion 60 includes a first recess 601 that holds the first bus ring 51, a second recess 602 that holds the second bus ring 52, and a third recess 603 that holds the third bus ring 53. The first to third recesses 601 to 603 are groove-shaped recesses that are recessed from the outer periphery toward the inner periphery of the power collection and distribution ring 112 and extend parallel to each other along the longitudinal direction of the holding member 6. The first to third recesses 601 to 603 house the annular portions 511, 521, and 531 of the first to third bus rings 51 to 53, respectively.

[0030] The holding member 6 is also provided with a first engaging portion 61 and a second engaging portion 62 that engage with the insulating member 4 and restrict relative axial movement of the first to third bus rings 51 to 53 with respect to the insulating member 4. The first engaging portion 61 is a protrusion that protrudes from the outer circumferential surface 6a of the holding member 6. The second engaging portion 62 is a protrusion that protrudes from the inner circumferential surface 6b of the holding member 6.

[0031] The first to third armature windings 31 to 33 and the first to third bus rings 51 to 53 are connected with the first to third bus rings 51 to 53 supported relative to the armature core 2 by the holding member 6. In this embodiment, the neutral phase bus ring 54 shown in FIG. 1 is not supported by the holding member 6, but the neutral phase bus ring 54 may be supported together with the first to third bus rings 51 to 53 by the holding member 6. In this case, a fourth recess that receives and holds the neutral phase bus ring 54 is formed in the holding portion 60 of the holding member 6, and the first to third bus rings 51 to 53 and the neutral phase bus ring 54 are supported in parallel to each other and aligned in the axial direction.

[0032] The armature core 2 is formed by combining a plurality of core members 20. In this embodiment, the armature core 2 is made up of 12 core members 20 arranged in the circumferential direction. The stator 11 has the same number of insulating members 4 as the core members 20, and an insulating member 4 is combined with each of the plurality of core members 20.

[0033] 7 is a perspective view showing the core member 20, insulating member 4, and holding member 6 lined up in the vertical direction of the drawing. The core member 20 is formed by stacking multiple core plates 200 punched from electromagnetic steel sheets, and has teeth 21 and a back yoke 22 as an integral part. The teeth 21 are provided so as to protrude radially inward from the back yoke 22. When multiple core members 20 are lined up in the circumferential direction, the back yokes 22 of each core member 20 form a continuous annular shape.

[0034] The insulating member 4 is made up of a first divided body 401 and a second divided body 402 that are arranged to sandwich the core member 20 in the axial direction. The first divided body 401 and the second divided body 402 are made of resin and are each formed by injection molding. The first divided body 401 and the second divided body 402 are fixed to the core member 20 by having the first to third armature windings 31 to 33 wound around their outer peripheries.

[0035] The insulating member 4 also has an intervening portion 41 interposed between the tooth 21 and the first to third armature windings 31 to 33, a flat substrate portion 42 covering the axial end surface 22a of the back yoke 22 of the core member 20, a partition wall portion 43 separating a space in which the first to third armature windings 31 to 33 are disposed from a space in which the power collection and distribution ring 112 is disposed, an outer peripheral wall portion 44 located on the outer periphery of the annular portions 511, 521, and 531 of the first to third bus rings 51 to 53, and an inner peripheral wall portion 45 located on the inner periphery of the annular portions 511, 521, and 531 of the first to third bus rings 51 to 53. The crimped portions 512, 522, and 532 of the first to third bus rings 51 to 53 are located outside the outer peripheral wall portion 44. The partition wall portion 43, the outer peripheral wall portion 44, and the inner peripheral wall portion 45 are provided to protrude from the base plate portion 42 in the axial direction.

[0036] The partition wall portion 43 is formed with slits 430 through which one ends 311, 321, 331 of the first to third armature windings 31 to 33 are inserted. The outer peripheral wall portion 44 is provided with a first engaged portion 441 that engages with the first engaging portion 61 of the holding member 6. The inner peripheral wall portion 45 is provided with a second engaged portion 451 that engages with the second engaging portion 62 of the holding member 6. The first engaged portion 441 and the second engaged portion 451 are formed as recesses that engage with the first engaging portion 61 and the second engaging portion 62, respectively. Axial movement of the holding member 6 relative to the insulating member 4 is restricted by the first engaged portion 61 and the second engaged portion 451 engaging with the first engaged portion 441 and the second engaged portion 451.

[0037] Furthermore, outer peripheral wall portion 44 is formed with notches 440 extending parallel to the axial direction of armature core 2. As shown in FIG. 2 , protruding portions 513, 523, 533 that are portions between annular portions 511, 521, 531 and crimped portions 512, 522, 532 of first to third bus rings 51 to 53 are inserted into notches 440 of outer peripheral wall portion 44 of some of insulating members 4 out of the plurality of insulating members 4.

[0038] An outer peripheral wall portion 44 is disposed on the radially inner side of the crimped portions 512, 522, 532 of the first to third bus rings 51 to 53. This prevents discharge from occurring between the crimped portion 512 of the first bus ring 51 and the winding connection portion 524 of the second bus ring 52 or the winding connection portion 534 of the third bus ring 53, between the crimped portion 522 of the second bus ring 52 and the winding connection portion 514 of the first bus ring 51 or the winding connection portion 534 of the third bus ring 53, and between the crimped portion 532 of the third bus ring 53 and the winding connection portion 514 of the first bus ring 51 or the winding connection portion 524 of the second bus ring 52.

[0039] Fig. 8(a) is a diagram showing first bus ring 51 viewed radially from the direction of arrow A1 in Fig. 5(a) together with connection terminals 71 attached to crimped portions 512 of first bus ring 51. Fig. 8(b) is a diagram showing second bus ring 52 viewed radially from the direction of arrow A2 in Fig. 5(b) together with connection terminals 72 attached to crimped portions 522 of second bus ring 52. Fig. 8(c) is a diagram showing third bus ring 53 viewed radially from the direction of arrow A3 in Fig. 5(c) together with connection terminals 73 attached to crimped portions 532 of third bus ring 53.

[0040] The connection terminals 71-73 have crimping portions 711, 721, 731 that are crimped to the crimped portions 512, 522, 532 of the first to third bus rings 51-53, respectively, and flat terminal block connecting portions 712, 722, 732 that are connected to the terminal block electrodes 81-83 of the terminal block 8. The terminal block connecting portions 712, 722, 732 are formed with bolt insertion holes 710, 720, 730 (see FIG. 2) through which bolts 800 (see FIG. 3) for fixing to the terminal block 8 are inserted. The connection terminals 71-73 are attached to the first to third bus rings 51-53 so that the terminal block connecting portions 712, 722, 732 are perpendicular to the axial direction.

[0041] 8(a) to 8(c), when the first to third bus rings 51 to 53 are viewed in the radial direction, the protruding portions 513, 533 of the first bus ring 51 and the third bus ring 53 are inclined with respect to the axial direction. The protruding portion 523 of the second bus ring 52 is perpendicular to the axial direction, and the annular portion 521 and the protruding portion 523 are aligned in a straight line. The inclination direction of the protruding portion 533 of the third bus ring 53 is opposite to the inclination direction of the protruding portion 513 of the first bus ring 51.

[0042] Fig. 9(a) is a perspective view showing power collection and distribution ring 112. Fig. 9(b) is a configuration diagram of power collection and distribution ring 112 viewed radially from the direction of arrow A4 shown in Fig. 9(a). Fig. 9(c) is an explanatory diagram illustrating the periphery of crimped portions 512, 522, 532 and protruding portions 513, 523, 533 of first to third bus rings 51 to 53 and connection terminals 71, 72, 73 extracted from Fig. 9(b).

[0043] 9(c), the axial center position of annular portion 511 of first bus ring 51, the axial center position of annular portion 521 of second bus ring 52, and the axial center position of annular portion 531 of third bus ring 53 are indicated by dashed dotted lines L1, L2, and L3, respectively. When first to third bus rings 51 to 53 are viewed from the radial direction, crimped portions 512, 522, and 532 of first to third bus rings 51 to 53 are aligned along line L2 with the position of annular portion 521 of second bus ring 52. That is, in first bus ring 51, the inclination of protruding portion 513 aligns the axial position of crimped portion 512 with the axial position of crimped portion 522 of second bus ring 52. In third bus ring 53, the axial position of crimped portion 532 is aligned with the axial position of crimped portion 522 of second bus ring 52 due to the inclination of protruding portion 533.

[0044] (Actions and Effects of the Embodiments) According to the embodiment described above, the axial positions of the crimped portions 512, 522, 532 of the first to third bus rings 51 to 53 are aligned, so that the terminal blocks 8 can be arranged radially on the outer peripheries of the first to third bus rings 51 to 53, and the terminal block connecting portions 712, 722, 732 of the connection terminals 71 to 73 can be easily and reliably connected to the terminal block electrodes 81 to 83 of the terminal block 8. This eliminates the need to use a terminal block with a special shape having a stepped structure according to the axial positions of the first to third bus rings 51 to 53, for example, and allows the power collection and distribution ring 112 to be made smaller while suppressing increases in costs.

[0045] Furthermore, according to the present embodiment, crimped portions 512, 522, and 532 of first to third bus rings 51 to 53 are provided radially outward of annular portions 511, 521, and 531. Therefore, crimped portion 711 of connection terminal 71 crimped to crimped portion 512 of first bus ring 51 does not interfere with annular portion 521 of second bus ring 52, and crimped portion 721 of connection terminal 72 crimped to crimped portion 522 of second bus ring 52 does not interfere with annular portions 511 and 531 of first and third bus rings 51 and 53. Furthermore, crimped portion 731 of connection terminal 73 crimped to crimped portion 532 of third bus ring 53 does not interfere with annular portion 521 of second bus ring 52. This allows the axial distance between annular portions 511, 521, 531 of first to third bus rings 51 to 53 to be narrowed, and power collection and distribution ring 112 can be made smaller.

[0046] (Variation) 8 and 9, the case has been described in which protruding portions 513, 533 of first bus ring 51 and third bus ring 53 are inclined so that the positions of crimped portions 512, 532 of first bus ring 51 and third bus ring 53 are aligned with the position of crimped portion 522 of second bus ring 52 in the axial direction. However, the present invention is not limited to this, and protruding portions 523, 533 of second bus ring 52 and third bus ring 53 may be inclined so that the positions of crimped portions 522, 532 of second bus ring 52 and third bus ring 53 are aligned with the position of crimped portion 512 of first bus ring 51 in the axial direction. In addition, the protrusions 513, 523 of the first bus ring 51 and the second bus ring 52 may be inclined so as to align the positions of the crimped portions 512, 522 of the first bus ring 51 and the second bus ring 52 with the position of the crimped portion 532 of the third bus ring 53 in the axial direction.

[0047] 10 is an explanatory diagram showing Modification 1 in which the protruding portions 523, 533 of the second bus ring 52 and the third bus ring 53 are inclined. In Modification 1, the protruding portion 513 of the first bus ring 51 is perpendicular to the axial direction, and the annular portion 511 and the protruding portion 513 are aligned in a straight line. The protruding portion 523 of the second bus ring 52 is inclined with respect to the annular portion 521, and the protruding portion 533 of the third bus ring 53 is inclined with respect to the annular portion 531 at an angle greater than that of the protruding portion 523 of the second bus ring 52. This configuration also makes the positions of the terminal block connecting portions 712, 722, 732 of the connection terminals 71 to 73 uniform in the axial direction, thereby enabling easy and reliable connection with the terminal block electrodes 81 to 83 of the terminal block 8.

[0048] 11 is an explanatory diagram showing Modification 2 in which protrusions 513, 523 of first bus ring 51 and second bus ring 52 are inclined. In Modification 2, protrusion 533 of third bus ring 53 is perpendicular to the axial direction, and annular portion 531 and protrusion 533 are aligned in a straight line. Protrusion 523 of second bus ring 52 is inclined with respect to annular portion 521, and protrusion 513 of first bus ring 51 is inclined with respect to annular portion 511 at a larger angle than protrusion 523 of second bus ring 52. This configuration also makes the positions of terminal block connecting portions 712, 722, 732 of connection terminals 71 to 73 uniform in the axial direction, thereby enabling easy and reliable connection with terminal block electrodes 81 to 83 of terminal block 8.

[0049] However, as explained with reference to Figures 8 and 9, if the protruding portions 513, 533 of the first bus ring 51 and the third bus ring 53 are inclined so as to align the positions of the crimped portions 512, 532 of the first bus ring 51 and the third bus ring 53 with the position of the crimped portion 522 of the second bus ring 52, the angle of inclination of the protruding portions 513, 533 of the first bus ring 51 and the third bus ring 53 can be made smaller than the angle of inclination of the protruding portion 533 of the third bus ring 53 relative to the annular portion 531 in variant 1 and the angle of inclination of the protruding portion 513 of the first bus ring 51 relative to the annular portion 511 in variant 2, making processing easier.

[0050] Furthermore, in variants 1 and 2, the length of the wire cut out during manufacturing of the first to third bus rings 51 to 53 (the length of the central conductor 501) is different for each of the first to third bus rings 51 to 53, but in the configurations shown in Figures 8 and 9, the length of the central conductor 501 of the first bus ring 51 and the length of the central conductor 501 of the third bus ring 53 are the same, which also makes manufacturing easier than variants 1 and 2.

[0051] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiments will be described by using the reference numerals and the like in the embodiments. However, the reference numerals in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiments.

[0052] [1] A current collection and distribution ring (112) electrically connects armature windings (31-33) of multiple phases wound around a plurality of teeth (21) of an armature core (2) having a plurality of teeth (21) to a plurality of electrodes (81-83) of a terminal block (8), the current collection and distribution ring (112) comprising: a plurality of bus rings (51-53) connected to the armature windings (31-33) for each current phase; a holding member (6) for holding the plurality of bus rings (51-53); and a plurality of connection terminals (71-73) attached to the plurality of bus rings (51-53), wherein the plurality of connection terminals (71-73) have crimped portions (711, 522, 532) crimped to respective crimped portions (512, 522, 532) of the plurality of bus rings (51-53). a terminal block connecting portion (712, 722, 732) connected to the electrodes (81 to 83) of the terminal block (8); the plurality of bus rings (51 to 53) are arranged in the axial direction and held by the holding member (6); and of the plurality of bus rings (51 to 53), except for one bus ring (52), the other bus rings (51, 53) have portions (protruding portions 513, 533) near the crimped portions (512, 532) inclined with respect to the axial direction, and due to this inclination, the axial positions of the crimped portions (512, 532) of the other bus rings (51, 53) are aligned with the axial position of the crimped portion (522) of the one bus ring (52).

[0053] [2] The power collection and distribution ring (112) described in [1] above, wherein the plurality of bus rings (51 to 53) each have an annular portion (511, 521, 531) having an annular shape, the crimped portion (512, 522, 532) is provided radially outward of the annular portion (511, 521, 531), and the other bus rings (51, 53) have a portion (protruding portion 513, 533) between the annular portion (511, 531) and the crimped portion (512, 532) that is inclined with respect to the axial direction.

[0054] [3] The electricity collection and distribution ring (112) according to [1] or [2] above, wherein the number of the plurality of bus rings (51 to 53) is three, and the one bus ring (52) is arranged between two of the other bus rings (51, 53).

[0055] Although the embodiments and modifications of the present invention have been described above, the above embodiments and modifications do not limit the scope of the invention as claimed. It should be noted that not all of the combinations of features described in the embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Furthermore, the present invention can be appropriately modified and implemented without departing from the spirit of the invention, and can be modified, for example, as follows:

[0056] In the above embodiment, the case where power collection and distribution ring 112 has a plurality of holding members 6 has been described, but power collection and distribution ring 112 may have a single holding member formed in an annular shape, and this single holding member may hold first to third bus rings 51 to 53. Furthermore, in the above embodiment, the case where armature core 2 of armature 111 is formed by combining a plurality of core members 20, and armature 111 has a plurality of insulating members 4 corresponding to each of the plurality of core members 20 has been described, but the armature core may be formed in an integral annular shape having a plurality of teeth, and the insulating members may be formed in an integral annular shape. [Explanation of symbols]

[0057] 112... Power collection and distribution ring 2... Armature core 21...Teeth 31~33...Armature winding 51-53... Bus ring 6... Holding member 71 to 73: Connection terminals 711, 721, 731: Crimping section 712, 722, 732...Terminal block connection part 8...Terminal block 81~83…Terminal block electrode

Claims

1. A power collection and distribution ring electrically connects armature windings of multiple phases wound around a plurality of teeth of an armature core having a plurality of teeth to a plurality of electrodes of a terminal block, a plurality of bus rings connected to the armature windings of the plurality of phases for each current phase, a holding member for holding the plurality of bus rings, and a plurality of connection terminals attached to the plurality of bus rings, each of the plurality of connection terminals includes a crimping portion crimped to a corresponding crimped portion of the plurality of bus rings and a terminal block connecting portion connected to the electrode of the terminal block; the plurality of bus rings are arranged in an axial direction and held by the holding member, a portion of each of the bus rings other than one of the plurality of bus rings near the crimped portion inclined with respect to the axial direction, and the inclination aligns the axial position of the crimped portion of the other bus ring with the axial position of the crimped portion of the one bus ring; Power collection and distribution ring.

2. Each of the bus rings has an annular portion having an annular shape, and the crimped portion is provided radially outward from the annular portion, the other bus ring has a portion between the annular portion and the crimped portion inclined with respect to the axial direction; The power collection and distribution ring according to claim 1 .

3. the number of the plurality of bus rings is three, and one bus ring is disposed between two of the other bus rings; The electricity collection and distribution ring according to claim 1 or 2.

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