Collecting and distributing ring, bus ring support structure, and rotary electric machine

Abstract

To provide a collecting and distributing ring, a bus ring support structure, and a rotary electric machine in which vibration of a holding member which holds a plurality of bus rings connected to corresponding multi-phase armature windings in respective current phases can be suppressed while the number of assembling steps is suppressed.SOLUTION: A collecting and distributing ring 112 is fit to an armature 1 including an armature core 2 having a plurality of teeth 21, multi-phase armature windings 31 to 33 wound around the plurality of teeth 21, and an insulating member 4 having intervening portions 41 intervening between the teeth 21 and the armature windings 31 to 33. The collecting and distributing ring 112 includes bus rings 51 to 53 respectively connected to the armature windings 31 to 33 in respective current phases, and a holding member 6 holding the bus rings 51 to 53. The holding member 6 is provided with engagement portions 61 to 64 that engage with engaged portions 441, 442, 451, 452 disposed on the insulating member 4, thereby regulating axial direction movement of the bus rings 51 to 53 relative to the insulating member 4.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a power collection and distribution ring, a support structure for a bus ring, and a rotating electrical machine.

Background Art

[0002] Conventionally, for example, as a power collection and distribution ring for collecting and distributing currents of a plurality of phases to the windings of the stator of an electric motor used as a drive source for an electric vehicle or a hybrid vehicle, and its holding structure, the applicant has proposed those described in Patent Documents 1 and 2.

[0003] The power collection and distribution ring described in Patent Document 1 includes first to third bus rings connected to the windings of the U-phase, V-phase, and W-phase, and a plurality of fixing members for fixing the first to third bus rings to each other. The first to third bus rings have a plurality of connection portions for connecting to the respective windings of the U-phase, V-phase, and W-phase. The plurality of fixing members each have first to third recesses for accommodating and holding the first to third bus rings, and are arranged side by side in the circumferential direction of the plurality of bus rings. This power collection and distribution ring constitutes a three-phase AC motor together with a core around which the windings of the U-phase, V-phase, and W-phase are wound, and an insulator disposed between the core and the windings.

[0004] The power collection and distribution ring described in Patent Document 2 is composed of first to third bus rings, and the first to third bus rings are held by a holding portion formed as a part of an insulator. A plurality of holding portions are provided along the longitudinal direction of the first to third bus rings, and each holding portion is formed with a plurality of three recesses capable of accommodating a part of the longitudinal direction of the first to third bus rings, respectively.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the configuration of the power distribution ring described in Patent Document 1, the fixing member is indirectly supported with respect to the core and the insulator via the first to third bus rings. However, for example, if vibration occurs due to the running of the vehicle or the rotation of the rotor and the fixing member vibrates, a load caused by the vibration of the fixing member is applied to the connection portion between the first to third bus rings and the winding. In this regard, in the configuration described in Patent Document 2, since a plurality of holding portions for holding the first to third bus rings are integrally formed on the insulator, the vibration of the holding portions is suppressed. However, when assembling the motor, the first to third bus rings must be sequentially fitted into the respective concave portions of the plurality of holding portions arranged in a ring shape, and compared with the configuration of Patent Document 1 in which the first to third bus rings can be collectively assembled to the core and the insulator in a state where they are mutually fixed in advance by a plurality of fixing members, the assembly man-hours increase. [[ID=1B]]

[0007] In addition, in the configuration described in Patent Document 1, if the fixing member is pressed and fixed to the insulator side by a part of the case member that houses the motor, the configuration of the case member becomes complicated, the dimensional accuracy required for the case member becomes high, and the processing cost increases.

[0008] Therefore, an object of the present invention is to provide a power distribution ring, a bus ring support structure, and a rotating electric machine capable of suppressing the vibration of a holding member that holds a plurality of bus rings connected for each current phase to each of a plurality of phase armature windings while suppressing the assembly man-hours.

Means for Solving the Problems

[0009] The present invention is directed to a power distribution ring that is combined with an armature having an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer circumferences of the plurality of teeth, and an insulating member made of an insulator having an intervening portion intervening between the teeth and the plurality of phases of armature windings, and that performs power collection and distribution for the plurality of phases of armature windings. The power distribution ring includes a plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase, and a holding member that holds the plurality of bus rings. The holding member is provided with an engaging portion that engages with an engaged portion provided on the insulating member to restrict relative movement of the plurality of bus rings in the axial direction with respect to the insulating member.

[0010] Also, the present invention is directed to a support structure that supports, for an armature having an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer circumferences of the plurality of teeth, and an insulating member made of an insulator having an intervening portion intervening between the teeth and the plurality of phases of armature windings, a plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase, using a holding member having a plurality of holding portions that respectively hold the plurality of bus rings. The holding member has an engaging portion that engages with an engaged portion provided on the insulating member, and axial relative movement of the holding member with respect to the insulating member is restricted by the engaging portion engaging with the engaged portion.

[0011] Further, the present invention aims to solve the above problems, and includes a stator including an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer circumferences of the plurality of teeth, an insulating member made of an insulator having an intervening portion interposed between the teeth and the plurality of phases of armature windings, and a power collection and distribution ring that performs power collection and distribution for the plurality of phases of armature windings, and a rotor that rotates with respect to the stator by a rotating magnetic field generated by a current flowing through the plurality of phases of armature windings of the stator. The power collection and distribution ring includes a plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase, and a holding member that holds the plurality of bus rings. Axial relative movement of the holding member with respect to the insulating member is restricted by engagement of an engaging portion provided on the holding member with an engaged portion provided on the insulating member. A rotating electrical machine is provided.

Advantages of the Invention

[0012] According to the power collection and distribution ring, the support structure of the bus ring, and the rotating electrical machine according to the present invention, it is possible to suppress the vibration of the holding member that holds the plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase while suppressing the assembly man-hours.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0014] [Embodiment] FIG. 1 is a schematic diagram showing a configuration example of a rotating electrical machine according to an embodiment of the present invention. FIG. 2 is an external perspective view showing the stator of the rotating electrical machine. FIG. 3 is a configuration diagram of the stator of the rotating electrical machine viewed from the axial direction. FIG. 4 is an exploded perspective view of the stator. This rotating electrical machine 1 is mounted on a vehicle such as an electric vehicle or a so-called hybrid vehicle, and functions as an electric motor that generates a driving force for rotating the wheels during acceleration or constant-speed running of the vehicle, and functions as a generator that generates regenerative power during deceleration of the vehicle.

[0015] The rotating electrical machine 1 has a stator 11, a rotor 12 disposed inside the stator 11, and an output rotating shaft 13 inserted through the central portion 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 respect to the stator 11 about the rotation axis O. In the following description, the axial direction refers to the direction parallel to the rotation axis O, the radial direction refers to the direction perpendicular to the rotation axis O, and the circumferential direction refers to the direction perpendicular to the axial direction and the radial direction.

[0016] As shown in Fig. 1, the stator 11 includes an armature core 2 having a plurality of teeth 21, a plurality of armature windings 31 to 33 wound around the plurality of teeth 21 respectively, an insulating member 4 made of an insulator having an intervening portion 41 (see Figs. 6 and 7 described later) intervening between the teeth 21 and the armature windings 31 to 33, a plurality of bus bars 51 to 53 connected to each of the plurality of armature windings 31 to 33 for each current phase, a neutral bus bar 54, a plurality of holding members 6 (see Figs. 2 to 4) for holding the bus bars 51 to 53, and a plurality of connection terminals 7. Among these, the armature core 2, the armature windings 31 to 33, and the insulating member 4 constitute the armature 111. Also, the plurality of bus bars 51 to 53 and the plurality of holding members 6 constitute a power collection and distribution ring 112 that performs power collection and distribution (power collection and power distribution) for the plurality of armature windings 31 to 33. The plurality of bus bars 51 to 53 are supported with respect to the armature 111 by a support structure described later using the plurality of holding members 6.

[0017] In this embodiment, the rotating electrical machine 1 is a three-phase AC motor, and a three-phase AC current is supplied from an inverter (not shown) to the plurality of armature windings 31 to 33. Hereinafter, the armature windings 31 to 33 will be referred to as the first to third armature windings 31 to 33. Also, the bus bar 51 connected to the first armature winding 31 is referred to as the first bus bar 51, the bus bar 52 connected to the second armature winding 32 is referred to as the second bus bar 52, and the bus bar 53 connected to the third armature winding 33 is referred to as the third bus bar 53.

[0018] 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 4 each. As shown in Fig. 4, the first to third bus bars 51 to 53 are formed by bending an insulated wire in which a linear central conductor (metal conductor) 501 made of a highly conductive metal such as copper is coated with an insulator 502 made of resin.

[0019] The first armature winding 31 is supplied with a U-phase current from the first bus ring 51, and the second armature winding 32 is supplied with a V-phase current that is 120° out of phase with the U-phase current from the second bus ring 52. The third armature winding 33 is supplied with a W-phase current that is 240° out of phase with the U-phase current from the third bus ring 53. The rotor 12 rotates with respect to the stator 11 due to the 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.

[0020] As shown in FIG. 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. Also, 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.

[0021] As shown in FIG. 4, the first bus ring 51 has an annular portion 511 having an annular shape centered on the rotation axis O, an outer protruding portion 512 protruding outward in the radial direction of the annular portion 511, and a plurality of inner protruding portions 513 protruding inward in the radial direction of the annular portion 511. The outer protruding portion 512 protrudes outward in the radial direction of the annular portion 511 from one location of the annular portion 511. The plurality of inner protruding portions 513 protrude inward in the radial direction of the annular portion 511 from a plurality of locations of the annular portion 511.

[0022] Similarly, the second bus ring 52 has an annular portion 521 having an annular shape centered on the rotation axis O, an outer protruding portion 522 protruding outward in the radial direction of the annular portion 521, and a plurality of inner protruding portions 523 protruding inward in the radial direction of the annular portion 521. The outer protruding portion 522 protrudes outward in the radial direction of the annular portion 521 from one location of the annular portion 521. The plurality of inner protruding portions 523 protrude inward in the radial direction of the annular portion 521 from a plurality of locations of the annular portion 521.

[0023] Similarly, the third bus ring 53 has an annular portion 531 in an annular shape centered on the rotation axis O, an outer protruding portion 532 protruding outward in the radial direction of the annular portion 531, and a plurality of inner protruding portions 533 protruding inward in the radial direction of the annular portion 531. The outer protruding portion 532 protrudes outward in the radial direction of the annular portion 531 from one location of the annular portion 531. The plurality of inner protruding portions 533 protrude inward in the radial direction of the annular portion 531 from a plurality of locations of the annular portion 531.

[0024] The annular portions 511, 521, 531 of the first to third bus rings 51 to 53 have the same diameter and are arranged side by side along the axial direction of the armature core 2 on one axial side of the armature core 2. The outer protruding portions 512, 522, 532 of the first to third bus rings 51 to 53 have the insulator 502 removed at the tip portions and the center conductor 501 exposed, and connection terminals 7 for connection to a terminal block (not shown) are attached to the tip portions of these outer protruding portions 512, 522, 532 by crimping.

[0025] One end 311 of each of the plurality of first armature windings 31 is connected to the plurality of inner protruding portions 513 of the first bus ring 51. One end 321 of each of the plurality of second armature windings 32 is connected to the plurality of inner protruding portions 523 of the second bus ring 52. Also, one end 331 of each of the plurality of third armature windings 33 is connected to the plurality of inner protruding portions 533 of the third bus ring 53.

[0026] In the inner protruding portions 513, 523, 533, the insulator 502 is removed and the center conductor 501 is exposed, and one end 311, 321, 331 of each of the first to third armature windings 31 to 33 and the inner protruding portions 513, 523, 533 are electrically and mechanically connected by thermal caulking (hugging). Note that the connection between the inner protruding portions 513, 523, 533 and one end 311, 321, 331 of the first to third armature windings 31 to 33 is not limited to thermal caulking, and may be performed by, for example, soldering or laser welding.

[0027] The plurality of holding members 6 are arranged side by side in the circumferential direction of the annular portions 511, 521, 531 of the first to third bus rings 51 to 53. In the present embodiment, the power collection and distribution ring 112 has 12 holding members 6, and these holding members 6 are arranged between a plurality of inner projecting portions 513, 523, 533 of each of the first to third bus rings 51 to 53. The holding member 6 is made of resin and is formed by injection molding. The shapes and sizes of the 12 holding members 6 are common. Thus, since the power collection and distribution ring 112 has a plurality of holding members 6 of the same shape, the mold for forming the holding member 6 can be made smaller compared to the case of using a single holding member formed in an annular shape centered on the rotation axis O, and the manufacturing cost can be reduced.

[0028] When the rotating electrical machine 1 is viewed from the axial direction, the shape of each holding member 6 is an arc shape centered on the rotation axis O. Hereinafter, the arc direction of the holding member 6 (the circumferential direction of the annular portions 511, 521, 531 centered on the rotation axis O) is referred to as the longitudinal direction of the holding member 6. Further, the surface of the holding member 6 corresponding to the outer peripheral side of the power collection and distribution ring 112 is referred to as the outer peripheral surface of the holding member 6, and the surface of the holding member 6 corresponding to the inner peripheral side of the power collection and distribution ring 112 is referred to as the inner peripheral surface of the holding member 6.

[0029] FIG. 5(a) is a perspective view of the holding member 6. FIG. 5(b) is a perspective cross-sectional view taken along the line C-C of FIG. 5(a). In the holding member 6, a holding portion 60 for holding the first to third bus rings 51 to 53 is formed. The holding portion 60 includes a first concave portion 601 for holding the first bus ring 51, a second concave portion 602 for holding the second bus ring 52, and a third concave portion 603 for holding the third bus ring 53. The first to third concave portions 601 to 603 are groove-shaped that are recessed from the outer peripheral side to the inner peripheral side of the power collection and distribution ring 112, and extend parallel to each other along the longitudinal direction of the holding member 6. The annular portions 511, 521, 531 of each of the first to third bus rings 51 to 53 are accommodated in the first to third concave portions 601 to 603.

[0030] Further, the holding member 6 is provided with first to fourth engaging portions 61 to 64 that engage with the insulating member 4 and restrict axial relative movement of the first to third bus rings 51 to 53 with respect to the insulating member 4. The first and second engaging portions 61 and 62 are provided as protrusions protruding from the outer peripheral surface 6a of the holding member 6. The third and fourth engaging portions 63 and 64 are provided as protrusions protruding from the inner peripheral surface 6b of the holding member 6. The first engaging portion 61 and the third engaging portion 63 are arranged side by side in a direction perpendicular to the longitudinal direction of the holding member 6 near one end in the longitudinal direction of the holding member 6. The second engaging portion 62 and the fourth engaging portion 64 are arranged side by side in a direction perpendicular to the longitudinal direction of the holding member 6 near the other end in the longitudinal direction of the holding member 6. The first engaging portion 61 and the second engaging portion 62 are provided spaced apart in the longitudinal direction of the holding member 6. Also, the third engaging portion 63 and the fourth engaging portion 64 are provided spaced apart in the longitudinal direction of the holding member 6. When the first to fourth engaging portions 61 to 64 of the holding member 6 engage with the insulating member 4, the first to third bus rings 51 to 53 are supported with respect to the armature core 2 via the holding member 6.

[0031] The protruding lengths (the heights of the first to fourth engaging portions 61 to 64) of the first to fourth engaging portions 61 to 64 from the outer peripheral surface 6a and the inner peripheral surface 6b are shorter than the lengths (the widths of the first to fourth engaging portions 61 to 64) of the first to fourth engaging portions 61 to 64 in the longitudinal direction of the holding member 6. Thereby, it is possible to reduce the amount of deformation of the outer peripheral wall portion 44 and the inner peripheral wall portion 45 when assembling the power distribution ring 112 to the armature 111, and it is possible to increase the rigidity of the first to fourth engaging portions 61 to 64, and it is possible to make the first to fourth engaging portions 61 to 64 difficult to be damaged.

[0032] The connection between the first to third armature windings 31 to 33 and the first to third bus bars 51 to 53 is performed in a state where the first to third bus bars 51 to 53 are supported by the holding member 6 with respect to the armature core 2. In the present embodiment, the neutral-phase bus bar 54 shown in FIG. 1 is not supported by the holding member 6, but the neutral-phase bus bar 54 may be supported by the holding member 6 together with the first to third bus bars 51 to 53. In this case, a fourth recess for accommodating and holding the neutral-phase bus bar 54 is formed in the holding portion 60 of the holding member 6, and the first to third bus bars 51 to 53 and the neutral-phase bus bar 54 are arranged in the axial direction and supported parallel to each other.

[0033] The armature core 2 is configured by combining a plurality of core members 20. In the present embodiment, the armature core 2 is composed 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 the insulating members 4 are combined with each of the plurality of core members 20. The plurality of insulating members 4 are arranged in the circumferential direction around the rotation axis O and constitute an annular insulating member assembly 40 as a whole. The insulating member assembly 40 functions as an insulator interposed between the armature core 2 and the first to third armature windings 31 to 33, and also functions as a support member for supporting the power distribution ring 112.

[0034] FIG. 6 is a perspective view showing the core member 20, the insulating member 4, and the holding member 6 arranged in the vertical direction of the drawing. FIG. 7 is a perspective view showing the core member 20, the insulating member 4, and the holding member 6 arranged in the vertical direction of the drawing as viewed from an angle different from that of FIG. 6. The core member 20 is formed by laminating a plurality of core plates 200 punched out from an electromagnetic steel sheet, and integrally has teeth 21 and a back yoke 22. The teeth 21 are provided so as to protrude radially inward from the back yoke 22. When the plurality of core members 20 are arranged in the circumferential direction, the back yokes 22 of the respective core members 20 are continuous and form an annular shape.

[0035] The insulating member 4 is composed of a first divided body 401 and a second divided body 402 that are arranged so as 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 winding the first to third armature windings 31 to 33 around their outer peripheries.

[0036] Also, the insulating member 4 includes an intervening portion 41 that intervenes between the teeth 21 and the first to third armature windings 31 to 33, a flat plate-like substrate portion 42 that covers the axial end face 22a of the back yoke 22 of the core member 20, a partition wall portion 43 that partitions the space where the first to third armature windings 31 to 33 are arranged and the space where the power collection and distribution ring 112 is arranged, an outer peripheral wall portion 44 that is located on the outer peripheries of the annular portions 511, 521, 531 of the first to third bus rings 51 to 53, and an inner peripheral wall portion 45 that is located on the inner peripheries of the annular portions 511, 521, 531 of the first to third bus rings 51 to 53. The partition wall portion 43, the outer peripheral wall portion 44, and the inner peripheral wall portion 45 are provided so as to project axially from the substrate portion 42. The insulating member assembly 40 has the same number of a plurality of inner peripheral wall portions 45 as the plurality of holding members 6 in the power collection and distribution ring 112, and the plurality of inner peripheral wall portions 45 are spaced apart from each other in the circumferential direction. Between two adjacent inner peripheral wall portions 45 in the circumferential direction, any of the inward projecting portions 513, 523, 533 of the first to third bus rings 51 to 53 is arranged.

[0037] The partition wall portion 43 is formed with slits 430 through which one end portions 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 and a second engaged portion 442 that engages with the second engaging portion 62 of the holding member 6. The inner peripheral wall portion 45 is provided with a third engaged portion 451 that engages with the third engaging portion 63 of the holding member 6 and a fourth engaged portion 452 that engages with the fourth engaging portion 64 of the holding member 6.

[0038] Further, a notch 440 extending parallel to the axial direction of the armature core 2 is formed in the outer peripheral wall portion 44 of the insulating member 4. The outer protruding portions 512, 522, and 532 of the first to third bus rings 51 to 53 are inserted into the notch 440. The first engaged portion 441 and the second engaged portion 442 are provided on one side and the other side of the notch 440 in the circumferential direction, respectively. More specifically, the outer peripheral wall portion 44 has a first portion 44A on one circumferential side of the notch 440 and a second portion 44B on the other circumferential side of the notch 440. The first engaged portion 441 is provided on the first portion 44A, and the second engaged portion 442 is provided on the second portion 44B. The notch 440 faces a portion where the third engaged portion 451 and the fourth engaged portion 452 of the inner peripheral wall portion 45 are not formed in the radial direction of the armature core 2.

[0039] The first to fourth engaged portions 441, 442, 451, and 452 are formed as recesses with which the first to fourth engaging portions 61 to 64 engage, respectively. The axial relative movement of the holding member 6 with respect to the insulating member 4 is restricted by the engagement of the first to fourth engaging portions 61 to 64 with the first to fourth engaged portions 441, 442, 451, and 452.

[0040] When assembling the stator 11, the first to third bus rings 51 to 53 are arranged such that the respective annular portions 511, 521, 531 are aligned in the axial direction, and a plurality of holding members 6 are assembled to the first to third bus rings 51 to 53 from the inside of the annular portions 511, 521, 531. In the present embodiment, since the power collection and distribution ring 112 has 12 holding members 6, the holding members 6 are assembled such that the annular portions 511, 521, 531 of the first to third bus rings 51 to 53 are received in the respective first to third recesses 601 to 603 of the 12 holding members 6. Then, the assembled power collection and distribution ring 112 is arranged axially with the armature 111, and the power collection and distribution ring 112 and the armature 111 are relatively moved axially such that the annular portions 511, 521, 531 of the first to third bus rings 51 to 53 are arranged between the respective outer peripheral wall portions 44 and inner peripheral wall portions 45 of the plurality of insulating members 4 together with the plurality of holding members 6, and the respective first to fourth engaging portions 61 to 64 of the plurality of holding members 6 are engaged with the respective first to fourth engaged portions 441, 442, 451, 452 of the plurality of insulating members 4.

[0041] FIGS. 8(a) and (b) are partial cross-sectional views of the rotating electrical machine 1 assembled in this way. FIG. 8(a) is a cross-sectional view taken along line A-A in FIG. 3, and FIG. 8(b) is a cross-sectional view taken along line B-B in FIG. 3. When assembling the power collection and distribution ring 112 to the armature 111, the intervals between the outer peripheral wall portion 44 and the inner peripheral wall portion 45 of the insulating member 4 are elastically expanded by the respective first to fourth engaging portions 61 to 64 of the holding member 6, and the first to fourth engaging portions 61 to 64 are engaged with the first to fourth engaged portions 441, 442, 451, 452.

[0042] As shown in FIGS. 8(a) and 8(b), the first to fourth engaging portions 61 to 64 of the holding member 6 and the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4 are provided at positions farther from the armature core 2 than the first bus ring 51 disposed at the position farthest from the armature core 2 among the first to third bus rings 51 to 53. Thereby, the amount of deformation of the outer peripheral wall portion 44 and the inner peripheral wall portion 45 when the power collecting and distributing ring 112 is assembled to the armature 111 can be reduced. In other words, while suppressing the amount of deformation of the outer peripheral wall portion 44 and the inner peripheral wall portion 45 when the power collecting and distributing ring 112 is assembled to the armature 111, the engagement depth between the first to fourth engaging portions 61 to 64 of the holding member 6 and the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4 can be increased, and the holding member 6 can be prevented from detaching from the insulating member 4. Here, the engagement depth means the depth at which the first to fourth engaging portions 61 to 64 formed as protrusions enter into the first to fourth engaged portions 441, 442, 451, 452 formed as recesses.

[0043] Also, as shown in FIGS. 8(a) and 8(b), in a cross-sectional view along the radial direction of the rotating electric machine 1, the width W of the portion of the holding member 6 excluding the first to fourth engaging portions 61 to 64 is narrower than the distance D between the outer peripheral wall portion 44 and the inner peripheral wall portion 45 in the radial direction. In the example shown in FIGS. 8(a) and 8(b), in the cross-sectional view, the outer peripheral surface 6a of the holding member 6 does not contact the outer peripheral wall portion 44, and the inner peripheral surface 6b of the holding member 6 does not contact the inner peripheral wall portion 45. Thereby, when the power collecting and distributing ring 112 is assembled to the armature 111, it becomes easier to insert the power collecting and distributing ring 112 between the outer peripheral wall portion 44 and the inner peripheral wall portion 45, and it becomes possible to further suppress the amount of deformation of the outer peripheral wall portion 44 and the inner peripheral wall portion 45 when the power collecting and distributing ring 112 is assembled to the armature 111. Further, in the present embodiment, the outer peripheral wall portion 44 is easily deformed by the notch 440 formed in the outer peripheral wall portion 44, and it becomes easier to assemble the power collecting and distributing ring 112 to the armature 111.

[0044] (Operations and Effects of the Embodiment) According to the embodiments described above, the sway of the holding member 6 can be suppressed by the engagement between the first to fourth engaging portions 61 to 64 of the holding member 6 and the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4, and it is possible to suppress a load caused by the sway of the holding member 6 from being applied to the connection portions between the first to third bus rings 51 to 53 and the first to third armature windings 31 to 33. Further, a plurality of holding members 6 assembled to the first to third bus rings 51 to 53 can be collectively assembled to a plurality of insulating members 4, making it possible to suppress the assembly man-hours.

[0045] (Summary of the Embodiment) Next, the technical idea grasped from the embodiments described above will be described by referring to the reference numerals and the like in the embodiments. However, each reference numeral in the following description is not limited to the members or the like that specifically show the components in the claims in the embodiments.

[0046] [1] An armature (111) including an armature core (2) having a plurality of teeth (21), a plurality of phase armature windings (31 to 33) respectively wound around the outer peripheries of the plurality of teeth (21), and an insulating member (4) made of an insulator having an intervening portion (41) intervening between the teeth (21) and the plurality of phase armature windings (31 to 33), and a power distribution ring (112) that performs power distribution and collection for the plurality of phase armature windings (31 to 33), the power distribution ring (112) including a plurality of bus rings (51 to 53) respectively connected to each of the plurality of phase armature windings (31 to 33) for each current phase, and a holding member (6) that holds the plurality of bus rings (51 to 53), wherein the holding member (6) is provided with engaging portions (61 to 64) that engage with engaged portions (441, 442, 451, 452) provided on the insulating member (4) to regulate the relative movement of the plurality of bus rings (51 to 53) in the axial direction with respect to the insulating member (4).

[0047] [2] The plurality of bus rings (51 to 53) have annular portions (511, 521, 531) that are annular and arranged axially with the armature core (2). The insulating member (4) has an outer peripheral wall portion (44) located on the outer periphery of each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53). The engaged portions (441, 442) are provided on the outer peripheral wall portion (44). The holding member (6) has at least one engaging portion (61, 62) that engages with the engaged portions (441, 442) provided on the outer peripheral wall portion (44). The power collecting and distributing ring (112) according to [1] above.

[0048] [3] The plurality of bus rings (51 to 53) have annular portions (511, 521, 531) that are annular and arranged axially with the armature core (2). The insulating member (4) has an inner peripheral wall portion (45) located on the inner periphery of each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53). The engaged portions (451, 452) are provided on the inner peripheral wall portion (45). The holding member (6) has at least one engaging portion (63, 64) that engages with the engaged portions (451, 452) provided on the inner peripheral wall portion (45). The power collecting and distributing ring (112) according to [1] above.

[0049] [4] The plurality of bus rings (51 to 53) have annular portions (511, 521, 531) that are annular and arranged axially with the armature core (2). The insulating member (4) has an outer peripheral wall portion (44) and an inner peripheral wall portion (45) located on the outer and inner peripheries of each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53). The engaged portions (441, 442, 451, 452) are provided on the outer peripheral wall portion (44) and the inner peripheral wall portion (45). The holding member (6) has at least one engaging portion (61, 62) that engages with the engaged portions (441, 442) provided on the outer peripheral wall portion (44), and at least one engaging portion (63, 64) that engages with the engaged portions (451, 452) provided on the inner peripheral wall portion (45). The power collecting and distributing ring (112) according to [1] above.

[0050] [5] Each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53) is arranged side by side along the axial direction of the armature core (2) on one side in the axial direction of the armature core (2), and the engaging portion is provided at a position farther from the armature core (2) than the bus ring (51) arranged at the position farthest from the armature core (2) among the plurality of bus rings (51 to 53). The power collection and distribution ring (112) according to any one of [2] to [4] above.

[0051] [6] The plurality of holding members (6) arranged side by side in the circumferential direction of each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53) are provided, and a plurality of the engaging portions (61 to 64) are provided on each of the plurality of holding members (6). At least one of the engaging portions (61, 63) among the plurality of engaging portions (61 to 64) is provided at a position separated from at least one of the other engaging portions (62, 64) in the circumferential direction. The power collection and distribution ring (112) according to any one of [2] to [4] above.

[0052] [7] The plurality of holding members (6) arranged side by side in the circumferential direction of each of the annular portions (511, 521, 531) of the plurality of bus rings (51 to 53) are provided, and a plurality of the engaging portions (61 to 64) are provided on each of the plurality of holding members (6). A notch (440) extending parallel to the axial direction of the armature core (2) is formed in the outer peripheral wall portion (44) of the insulating member (4). The plurality of bus rings (51 to 53) each have an outward protruding portion (512, 522, 532) protruding radially outward from the annular portion (511, 521, 531), and the outward protruding portion (512, 522, 532) passes through the notch (440). The plurality of engaging portions (61, 62) of the holding member (6) engage with the engaged portions (441, 442) provided on one side and the other side of the notch (440) in the circumferential direction respectively. The power collection and distribution ring (112) according to any one of [2] to [4] above.

[0053] [8] An armature (111) comprising: an armature core (2) having a plurality of teeth (21); a plurality of phases of armature windings (31 to 33) respectively wound around the outer circumferences of the plurality of teeth (21); and an insulating member (4) made of an insulator having an intervening portion (41) interposed between the teeth (21) and the plurality of phases of armature windings (31 to 33). A support structure for supporting a plurality of bus bars (51 to 53) respectively connected to each of the plurality of phases of armature windings (31 to 33) for each current phase, using a holding member (6) having a plurality of holding portions (60) for holding the plurality of bus bars (51 to 53). The holding member (6) has engaging portions (61 to 64) that engage with engaged portions (441, 442, 451, 452) provided on the insulating member (4), and axial relative movement of the holding member (6) with respect to the insulating member (4) is restricted by engagement of the engaging portions (61 to 64) with the engaged portions (441, 442, 451, 452). Support structure of the bus bars (51 to 53).

[0054] [9] A stator (11) comprising: an armature core (21) having a plurality of teeth; a plurality of phases of armature windings (31 to 33) respectively wound around the outer circumferences of the plurality of teeth (21); an insulating member (4) made of an insulator having an intervening portion (41) interposed between the teeth (21) and the plurality of phases of armature windings (31 to 33); and a power collection and distribution ring (112) for performing power collection and distribution with respect to the plurality of phases of armature windings (31 to 33). A rotor (12) that rotates with respect to the stator (11) by a rotating magnetic field generated by the current flowing through the plurality of phases of armature windings (31 to 33) of the stator (11). The power collection and distribution ring (112) includes a plurality of bus bars (51 to 53) respectively connected to each of the plurality of phases of armature windings (31 to 33) for each current phase, and a holding member (6) for holding the plurality of bus bars (51 to 53). Axial relative movement of the holding member (6) with respect to the insulating member (4) is restricted by engagement of engaging portions (61 to 64) provided on the holding member (6) with engaged portions (441, 442, 451, 452) provided on the insulating member (4). Rotating electrical machine (1).

[0055] The embodiments of the present invention have been described above. However, the above embodiments do not limit the invention according to the claims. It should also be noted that not all combinations of the features described in the embodiments are essential means for solving the problems of the invention. Further, the present invention can be appropriately modified and implemented without departing from its gist. For example, it can be modified and implemented as follows.

[0056] In the above embodiment, the first to fourth engaging portions 61 to 64 of the holding member 6 are protrusions, and the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4 are recesses. However, part or all of the first to fourth engaging portions 61 to 64 of the holding member 6 may be recesses, and correspondingly, part or all of the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4 may be protrusions.

[0057] Further, some of the first to fourth engaging portions 61 to 64 of the holding member 6 may be omitted, and correspondingly, some of the first to fourth engaged portions 441, 442, 451, 452 of the insulating member 4 may be omitted. For example, the third engaging portion 63 and the fourth engaging portion 64 of the holding member 6 may be omitted, and only the first engaging portion 61 and the second engaging portion 62 may be provided on the holding member 6, and the third engaged portion 451 and the fourth engaged portion 452 may not be provided on the inner peripheral wall portion 45 of the insulating member 4. Alternatively, conversely, the first engaging portion 61 and the second engaging portion 62 of the holding member 6 may be omitted, and only the third engaging portion 63 and the fourth engaging portion 64 may be provided on the holding member 6, and the first engaged portion 441 and the second engaged portion 442 may not be provided on the outer peripheral wall portion 44 of the insulating member 4. Furthermore, only one engaging portion may be provided on the outer peripheral surface 6a of the holding member 6, or only one engaging portion may be provided on the inner peripheral surface 6b of the holding member 6.

[0058] In the above-described embodiment, the case where the first to fourth engaging portions 61 to 64 are provided at positions farther from the armature core 2 than the first bus ring 51 has been described. However, the present invention is not limited thereto. For example, one or a plurality of engaging portions may be provided on the outer peripheral surface 6a or the inner peripheral surface 6b, or both the outer peripheral surface 6a and the inner peripheral surface 6b of the holding member 6 at a position closer to the armature core 2 than the third bus ring 5, and this engaging portion may be engaged with the engaged portion provided on the insulating member 4.

[0059] In the above-described embodiment, the case where the power collection and distribution ring 112 has a plurality of holding members 6 has been described. However, the power collection and distribution ring 112 may have a single holding member formed in an annular shape, and the first to third bus rings 51 to 53 may be held by this single holding member. In the above-described embodiment, the armature core 2 of the armature 111 is formed by combining a plurality of core members 20, and the case where the armature 111 has a plurality of insulating members 4 corresponding to each of the plurality of core members 20 has been described. However, the armature core may be integrally formed in an annular shape having a plurality of teeth, and the insulating member may be integrally formed in an annular shape.

Explanation of Reference Numerals

[0060] 1...Rotating electrical machine 11...Stator 111...Armature 112...Power collection and distribution ring 12...Rotor 2...Armature core 21...Teeth 31 to 33...First to third armature windings 4...Insulating member 41...Intervening portion 44...Outer peripheral wall portion 440...Notch 45...Inner peripheral wall portion 441, 442, 451, 452...First to fourth engaged portions 51 to 53...Bus rings 511, 521, 531...Annular portions 512, 522, 532...Outer projecting portions 6...Holding member 60...Holding portion 61 to 64... the first to fourth engaging portions

Claims

1. An armature combined with an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer circumferences of the plurality of teeth, and an insulating member made of an insulator having an intervening portion intervening between the teeth and the plurality of phases of armature windings, and a current collecting ring for performing current collection and distribution for the plurality of phases of armature windings, comprising a plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase, and a holding member for holding the plurality of bus rings, wherein the holding member is provided with an engaging portion that engages with an engaged portion provided on the insulating member to restrict relative movement of the plurality of bus rings in the axial direction with respect to the insulating member, Current collecting ring.

2. The plurality of bus rings have an annular portion having an annular shape arranged in the axial direction with the armature core, the insulating member has an outer peripheral wall portion located on the outer circumference of each of the annular portions of the plurality of bus rings, and the engaged portion is provided on the outer peripheral wall portion, and the holding member has at least one engaging portion that engages with the engaged portion provided on the outer peripheral wall portion. The current collecting ring according to claim 1.

3. The plurality of bus rings have an annular portion having an annular shape arranged in the axial direction with the armature core, the insulating member has an inner peripheral wall portion located on the inner circumference of each of the annular portions of the plurality of bus rings, and the engaged portion is provided on the inner peripheral wall portion, and the holding member has at least one engaging portion that engages with the engaged portion provided on the inner peripheral wall portion. The current collecting ring according to claim 1.

4. The plurality of bus rings have an annular portion having an annular shape arranged in the axial direction with the armature core, the insulating member has an outer peripheral wall portion and an inner peripheral wall portion located on the outer circumference and the inner circumference of each of the annular portions of the plurality of bus rings, and the engaged portion is provided on the outer peripheral wall portion and the inner peripheral wall portion, and the holding member has at least one engaging portion that engages with the engaged portion provided on the outer peripheral wall portion and at least one engaging portion that engages with the engaged portion provided on the inner peripheral wall portion. The current collecting ring according to claim 1.

5. The annular portions of the plurality of bus rings are arranged side by side along the axial direction of the armature core on one side in the axial direction of the armature core, The engaging portion is provided at a position farther from the armature core than the bus ring disposed at the position farthest from the armature core among the plurality of bus rings. The power collection and distribution ring according to any one of claims 2 to 4.

6. The plurality of holding members are provided side by side in the circumferential direction of the annular portion of each of the plurality of bus rings, and a plurality of the engaging portions are provided on each of the plurality of holding members, and at least one of the plurality of the engaging portions is provided at a position separated from at least one other of the engaging portions in the circumferential direction. The power collection and distribution ring according to any one of claims 2 to 4.

7. The plurality of holding members are provided side by side in the circumferential direction of the annular portion of each of the plurality of bus rings, and a plurality of the engaging portions are provided on each of the plurality of holding members. The insulating member is formed with a notch extending parallel to the axial direction of the armature core on the outer peripheral wall portion. Each of the plurality of bus rings has an outward protruding portion protruding radially outward from the annular portion, and the outward protruding portion passes through the notch. The plurality of engaging portions of the holding member engage with the engaged portions provided on one side and the other side of the notch in the circumferential direction, respectively. The power collection and distribution ring according to claim 2 or 4.

8. A support structure for supporting, for an armature including an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer peripheries of the plurality of teeth, and an insulating member made of an insulator having an intervening portion intervening between the teeth and the plurality of phases of armature windings, a plurality of bus rings each connected to each of the plurality of phases of armature windings for each current phase, using a holding member having a plurality of holding portions for holding the plurality of bus rings respectively, The holding member has an engaging portion that engages with an engaged portion provided on the insulating member. Axial relative movement of the holding member with respect to the insulating member is restricted by engagement of the engaging portion with the engaged portion. A support structure for a bus ring.

9. A stator includes an armature core having a plurality of teeth, a plurality of phases of armature windings respectively wound around the outer circumferences of the plurality of teeth, an insulating member made of an insulator having an intervening portion interposed between the teeth and the plurality of phases of armature windings, and a current collecting and distributing ring that performs current collecting and distributing for the plurality of phases of armature windings, and further includes a rotor that rotates with respect to the stator by a rotating magnetic field generated by currents flowing through the plurality of phases of armature windings of the stator. The current collecting and distributing ring includes a plurality of bus rings respectively connected to each of the plurality of phases of armature windings for each current phase, and a holding member that holds the plurality of bus rings. Axial relative movement of the holding member with respect to the insulating member is restricted by engagement of an engaging portion provided on the holding member with an engaged portion provided on the insulating member. Rotating electrical machine.

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