WO2018212127A1

WO2018212127A1 - Inverter integrated rotating electrical machine

Info

Publication number: WO2018212127A1
Application number: PCT/JP2018/018523
Authority: WO
Inventors: 渡邉　正人; 一善紺谷
Original assignee: 株式会社豊田自動織機
Priority date: 2017-05-19
Filing date: 2018-05-14
Publication date: 2018-11-22
Also published as: JP2018196279A; JP6717258B2

Abstract

This inverter integrated rotating electrical machine is provided with a housing, a rotor, a stator, an inverter case, a motor wiring, a heat sink, a cooling fan, and a rectifying member. The housing has a first end surface, and the first end surface has a first insertion hole into which the motor wiring is inserted in the axis direction of the rotating axis. The inverter case has a second end surface, and the second end surface has a second insertion hole into which the motor wiring is inserted in the axis direction of the rotating axis. The rectifying member has: a third insertion hole into which the motor wiring is inserted in the axis direction of the rotating axis; a first contact surface that comes into contact with, around the third insertion hole, the first end surface; and a second contact surface that comes into contact with, around the third insertion hole, the second end surface. The inverter integrated rotating electrical machine is provided with: a first seal member that is provided between the first end surface and the first contact surface; and a second seal member that is provided between the second end surface and the second contact surface.

Description

Inverter-integrated rotating electrical machine

The present invention relates to an inverter-integrated rotating electrical machine.

For example, Patent Document 1 discloses an inverter-integrated rotating electrical machine. An inverter-integrated rotating electrical machine includes a cylindrical housing that rotatably supports a rotating shaft, a rotor that rotates integrally with the rotating shaft, a stator that is fixed to the inner peripheral surface of the housing, and an inverter case that houses the inverter And. The inverter-integrated rotating electrical machine is configured by connecting a housing and an inverter case in the axial direction of the rotating shaft. Motor wiring is drawn from the stator coil. The motor wiring is electrically connected to the inverter terminal of the inverter. And the electric power from an inverter is supplied to the coil of a stator via an inverter terminal and motor wiring, and a rotor and a rotating shaft rotate integrally.

An inverter-integrated electric rotating machine equipped with a heat sink is known. The heat sink is attached to the inverter case between the housing and the inverter case in the axial direction of the rotating shaft, and is thermally coupled to the inverter. Furthermore, the inverter-integrated rotating electrical machine includes a cooling fan and a rectifying member. The cooling fan is fixed to the rotating shaft between the heat sink and the housing in the axial direction of the rotating shaft, and can rotate as the rotating shaft rotates to suck air. The rectifying member is disposed between the heat sink and the cooling fan in the axial direction of the rotating shaft, and has a rectifying hole for flowing air from the heat sink to the cooling fan. Then, the air taken in with the rotation of the cooling fan flows from the heat sink toward the cooling fan through the rectifying hole of the rectifying member. With this air, heat generated in the inverter is released to the outside through the heat sink, and the inverter is cooled.

JP 2013-201878 A

In such an inverter-integrated rotating electrical machine, the housing and the inverter case require a seal structure for sealing the inside. However, when the seal structure is complicated, the assembly of the inverter-integrated rotating electrical machine becomes complicated.

An object of the present invention is to provide an inverter-integrated dynamoelectric machine that can simplify the seal structure for sealing the insides of the housing and the inverter case, and can be easily assembled.

An inverter-integrated rotating electrical machine that achieves the above object includes a cylindrical housing that rotatably supports a rotating shaft, a rotor that rotates integrally with the rotating shaft, and a stator that is fixed to an inner peripheral surface of the housing. An inverter case coupled to the housing in the axial direction of the rotating shaft and accommodating an inverter; a motor wiring configured to be drawn from a coil of the stator and electrically connected to the inverter; A heat sink provided in the inverter case between the housing in the axial direction of the rotating shaft and the inverter case and configured to be thermally coupled to the inverter; and the heat sink in the axial direction of the rotating shaft; It is fixed to the rotating shaft between the housing and rotates with the rotation of the rotating shaft. A cooling fan capable of sucking air, a rectifying member disposed between the heat sink and the cooling fan in the axial direction of the rotating shaft, and having a rectifying hole for rectifying air between the heat sink and the cooling fan; Is provided. The housing has a first end surface, and the first end surface has a first insertion hole through which the motor wiring is inserted in the axial direction of the rotating shaft. The inverter case has a second end surface, and the second end surface has a second insertion hole through which the motor wiring is inserted in the axial direction of the rotating shaft. The rectifying member includes a third insertion hole through which the motor wiring is inserted in the axial direction of the rotation shaft, a first contact surface that contacts the first end surface around the third insertion hole, and the third A second contact surface that contacts the second end surface around the insertion hole. The inverter-integrated rotating electrical machine includes a first seal member provided between the first end surface and the first contact surface, and a second seal provided between the second end surface and the second contact surface. And a member.

The sectional side view which shows the inverter integrated rotary electric machine in one Embodiment. The disassembled perspective view of an inverter integrated rotating electrical machine. The disassembled perspective view of an inverter integrated rotating electrical machine. FIG. The partial expanded sectional view of an inverter integrated rotating electrical machine. The partial expanded sectional view of the inverter integrated rotating electrical machine in another embodiment. Furthermore, the partial expanded sectional view of the inverter integrated rotary electric machine in another embodiment.

Hereinafter, an embodiment in which an inverter-integrated rotating electrical machine is embodied will be described with reference to FIGS. Note that the inverter-integrated rotating electrical machine of the present embodiment is mounted on a vehicle.
As shown in FIGS. 1 and 2, the inverter-integrated rotating electrical machine 10 includes a housing 11, an inverter case 21 that houses the inverter 20, a heat sink 30, a cooling fan 40, and a rectifying member 50. .

The housing 11 includes a bottomed cylindrical first motor bracket 12 and a bottomed cylindrical second motor bracket 13. The first motor bracket 12 and the second motor bracket 13 are made of aluminum. Therefore, the housing 11 is made of metal.

As shown in FIG. 1, the first motor bracket 12 has a disc-shaped bottom portion 12a and a cylindrical tube portion 12b continuous to the outer peripheral edge of the bottom portion 12a. A through hole 12h is formed in the bottom portion 12a. As shown in FIG. 2, a plurality of attachment portions 12 c are provided on the outer peripheral surface of the cylindrical portion 12 b so as to protrude at predetermined intervals in the circumferential direction of the cylindrical portion 12 b.

As shown in FIG. 1, the second motor bracket 13 has a disk-shaped bottom portion 13a and a cylindrical tube portion 13b continuous to the outer peripheral edge of the bottom portion 13a. A through hole 13h is formed in the bottom portion 13a. As shown in FIG. 2, a plurality of attachment portions 13 c are provided on the outer peripheral surface of the cylindrical portion 13 b so as to protrude at predetermined intervals in the circumferential direction of the cylindrical portion 13 b. Furthermore, the second motor bracket 13 has a plurality of mounting legs 13k used for mounting the inverter case 21 to the second motor bracket 13.

The first motor bracket 12 and the second motor bracket 13 are arranged so that the open ends of the respective cylinder portions 12b face each other in the axial direction of the

respective cylinder portions

12b and 13b. Further, in the first motor bracket 12 and the second motor bracket 13, the mounting portions 12c of the first motor bracket 12 face each other in the axial direction of the mounting portions 13c of the second motor bracket 13 and the

cylindrical portions

12b and 13b. Are arranged as follows. Each attachment portion 12c of the first motor bracket 12 and each attachment portion 13c of the second motor bracket 13 are fastened by a screw 14a and a nut (not shown) screwed to the screw 14a. Each screw 14 a passes through the attachment portion 12 c of the first motor bracket 12 and is screwed into each attachment portion 13 c of the second motor bracket 13. Thereby, the 1st motor bracket 12 and the 2nd motor bracket 13 are connected in the state where a predetermined interval was put in the direction of an axis of each

cylinder part

12b and 13b.

As shown in FIG. 1, the inverter-integrated dynamoelectric machine 10 includes a rotating shaft 15. The first end of the rotary shaft 15 is inserted into the through hole 12h and is rotatably supported by the first motor bracket 12 via a bearing 16a. The second end of the rotary shaft 15 is inserted into the through hole 13h and supported rotatably on the second motor bracket 13 via a bearing 16b. Therefore, the housing 11 supports the rotating shaft 15 in a rotatable manner. The second end of the rotating shaft 15 passes through the through hole 13 h and protrudes from the outer end surface of the second motor bracket 13. The direction in which the axis L of the rotating shaft 15 extends, that is, the axial direction of the rotating shaft 15 coincides with the axial directions of the

cylindrical portions

12b and 13b.

The inverter-integrated dynamoelectric machine 10 includes a rotor 17 and a stator 18. The rotor 17 rotates integrally with the rotating shaft 15. The rotor 17 has a rotor core 17a configured by laminating a plurality of electromagnetic steel plates. Further, the rotor 17 includes a plurality of rotor bars 17b, a first end ring 17c, and a second end ring 17d. The plurality of rotor bars 17b penetrate the rotor core 17a in the axial direction of the rotary shaft 15 with a space in the circumferential direction of the rotor core 17a. The first end ring 17c is disposed on the first end face of the rotor core 17a. The second end ring 17d is disposed on the second end face of the rotor core 17a. The first ends of the plurality of rotor bars 17b are connected to the first end ring 17c, and the second ends of the plurality of rotor bars 17b are connected to the second end ring 17d.

The stator 18 is fixed to the inner peripheral surface of the housing 11 (the inner peripheral surface 12g of the cylindrical portion 12b and the inner peripheral surface 13g of the cylindrical portion 13b). The stator 18 has a cylindrical stator core 18a configured by laminating a plurality of electromagnetic steel plates. The first axial end portion of the stator core 18a on the outer peripheral surface of the stator core 18a is press-fitted into the open end portion of the inner peripheral surface 12g of the cylindrical portion 12b. Thereby, the axial direction 1st edge part of the stator core 18a is being fixed to the internal peripheral surface 12g of the cylinder part 12b. The second axial end portion of the stator core 18a on the outer peripheral surface of the stator core 18a is press-fitted into the open end portion of the inner peripheral surface 13g of the cylindrical portion 13b. Thus, the second axial end portion of the stator core 18a is fixed to the inner peripheral surface 13g of the cylindrical portion 13b. The outer peripheral surface located between both

cylinder parts

12b and 13b in the axial direction of the stator core 18a is not covered with the housing 11 but exposed to the outside.

The stator 18 has a coil 18b. The coil 18b is wound around a tooth (not shown) of the stator core 18a. An annular first coil end 181b that is a part of the coil 18b protrudes from the first end surface 181a in the axial direction of the stator core 18a. An annular second coil end 182b that is a part of the coil 18b protrudes from the second end surface 182a in the axial direction of the stator core 18a.

The first coil end 181b is covered with the cylindrical portion 12b of the first motor bracket 12. The second coil end 182 b is covered with the cylindrical portion 13 b of the second motor bracket 13. From the second coil end 182b, three motor wires 19 are drawn out corresponding to the U-phase, V-phase, and W-phase coils 18b. Therefore, the motor wiring 19 is drawn from the coil 18 b of the stator 18.

The housing 11, the rectifying member 50, and the inverter case 21 are arranged in this order in the axial direction of the rotary shaft 15. In the axial direction of the rotating shaft 15, the second motor bracket 13 is disposed at a position closer to the rectifying member 50 than the first motor bracket 12. That is, the second motor bracket 13 is disposed between the first motor bracket 12 and the rectifying member 50.

The second motor bracket 13 has a bulging wall 13d that bulges outward from the outer peripheral surface of the cylindrical portion 13b in the radial direction of the rotary shaft 15. Both axial sides of the rotating shaft 15 in the space inside the bulging wall 13d are closed by two closing

walls

13e and 13f that make a pair. As shown in FIGS. 1 and 2, the blocking wall 13 f is located on the side opposite to the first motor bracket 12. Three first insertion holes 11h are formed in the blocking wall 13f. The motor wiring 19 is inserted through the first insertion holes 11h in the axial direction of the rotary shaft 15. The outer end surface of the blocking wall 13f is a first end surface 11a in which a first insertion hole 11h is formed. Therefore, the housing 11 has the first end surface 11 a, and the first end surface 11 a has three first insertion holes 11 h through which the motor wiring 19 is inserted in the axial direction of the rotating shaft 15. The first end face 11a has a flat surface shape.

As shown in FIG. 1, each motor wiring 19 extends from the outer peripheral portion of the second coil end 182 b toward the bulging wall 13 d outward in the radial direction of the rotating shaft 15. Each motor wiring 19 is bent toward the side opposite to the second end face 182a of the stator core 18a inside the bulging wall 13d, and then extends in the axial direction of the rotary shaft 15 to each first insertion hole 11h. Is inserted.

A cylindrical insulating member 11g made of resin is provided on the inner surface of the bulging wall 13d. The three motor wires 19 pass through the inside of the insulating member 11g. The insulating member 11g insulates the second motor bracket 13 from the motor wires 19.

As shown in FIG. 2, the inverter case 21 has a square cylindrical case body 22. As shown in FIG. 1, one surface of the case body 22 opposite to the rectifying member 50 is open. A mounting hole 22 a to which the heat sink 30 is attached is formed in a part of the case body 22 that faces the rectifying member 50.

As shown in FIG. 3, the case main body 22 has an end surface 22 e that is disposed so as to face the first end surface 11 a via the rectifying member 50 in the axial direction of the rotary shaft 15. Three circular recesses 22b are formed on the end face 22e. A circular second insertion hole 24h through which each motor wiring 19 is inserted in the axial direction of the rotary shaft 15 is formed on the bottom surface of each recess 22b. The bottom surface of each recess 22b is a second end surface 24 in which each second insertion hole 24h is formed.

As shown in FIG. 1, the inside of the case body 22 is divided into a first space 221 communicating with the mounting hole 22a and three second insertion holes 24h by a flat partition wall 22c provided on the inner surface of the case body 22. It is partitioned into a second space 222 that communicates.

The inverter case 21 has a first cover member 23 a and a second cover member 23 b that close the opening of the case body 22. As shown in FIG. 2, the first cover member 23 a and the second cover member 23 b are attached to the case main body 22 by a plurality of

screws

23 d and 23 e through a gasket 23 c provided at the opening edge of the case main body 22. . The boundary between the opening edge of the case body 22 and the first cover member 23a and the second cover member 23b is sealed by a gasket 23c. The first cover member 23 a closes the opening of the first space 221 in the case body 22. The second cover member 23 b closes the opening of the second space 222 in the case body 22.

As shown in FIG. 1, the heat sink 30 includes a flat base 31 and fins 32 provided on one surface 31 a of the base 31. As shown in FIG. 3, the fins 32 are corrugated fins formed by folding a thin plate in a zigzag manner. The heat sink 30 is attached to the case body 22 with the base 31 fitted in the attachment hole 22a. Therefore, the heat sink 30 is provided in the inverter case 21 between the second motor bracket 13 and the inverter case 21 in the axial direction of the rotating shaft 15.

As shown in FIG. 1, the inverter 20 is attached to a surface 31 b opposite to the fin 32 in the base 31 of the heat sink 30. Therefore, the heat sink 30 is thermally coupled to the inverter 20. The inverter 20 is disposed in the first space 221.

The inverter 20 has a substrate 20a and a plurality of switching elements 20b mounted on the substrate 20a. The plurality of switching elements 20b constitute an upper arm and a lower arm of each phase corresponding to the U-phase, V-phase, and W-phase coils 18b, respectively. The inverter 20 converts direct current from a direct current power source such as an in-vehicle battery into alternating current by the switching operation of the switching element 20b.

As shown in FIGS. 1 and 2, three inverter terminals 25 are extended from the substrate 20a in the radial direction of the rotary shaft 15 corresponding to the U-phase, V-phase, and W-phase coils 18b. Each inverter terminal 25 is an elongated plate-like bus bar. The first end of each inverter terminal 25 is electrically connected to the substrate 20a via the interposition member 20c. The second end of each inverter terminal 25 protrudes into the second space 222 through the partition wall 22c. A connection hole 25 a is formed at the second end of each inverter terminal 25. The connection hole 25 a passes through the second end of the inverter terminal 25 in the axial direction of the rotary shaft 15. The boundary between each inverter terminal 25 and the partition wall 22c is sealed by a seal portion 231c that is a part of the gasket 23c.

As shown in FIG. 3, in the radial direction of the rotating shaft 15, heat radiation fins 26 are provided at portions opposite to the respective second insertion holes 24 h with respect to the heat sink 30 in the case body 22. The heat radiating fins 26 are corrugated fins formed by folding a thin plate in a zigzag manner. The radiating fins 26 are arranged at positions that overlap the fins 32 of the heat sink 30 in the radial direction of the rotating shaft 15.

2 and 3, a plurality of mounting leg portions 27 are provided on the outer surface of the case body 22 so as to protrude. The plurality of attachment legs 27 are used for attaching the inverter case 21 to the second motor bracket 13. Each mounting leg 27 opposes each mounting leg 13 k of the second motor bracket 13 in the axial direction of the rotary shaft 15.

As shown in FIGS. 1 and 2, the cooling fan 40 is fixed to the second end of the rotating shaft 15 between the heat sink 30 and the housing 11 (second motor bracket 13) in the axial direction of the rotating shaft 15. . The cooling fan 40 can rotate with the rotation of the rotating shaft 15 to suck air.

The rectifying member 50 is made of resin. The rectifying member 50 is disposed between the heat sink 30 and the cooling fan 40 in the axial direction of the rotating shaft 15, and has a plurality of rectifying holes 51 that rectify air between the heat sink 30 and the cooling fan 40. . Each rectifying hole 51 is generally rectangular. Each rectifying hole 51 faces the cooling fan 40 and the heat sink 30 in the axial direction of the rotary shaft 15.

As shown in FIGS. 2 and 3, the rectifying member 50 has a substantially disc-shaped main body 52 in which a plurality of rectifying holes 51 are formed, and extends from the outer edge of the main body 52 toward the second motor bracket 13. An exhaust guide cylinder portion 53. In addition, the exhaust guide cylinder part 53 has a plurality of protrusions 53 f that protrude outward in the radial direction of the rotary shaft 15. In FIG. 2, the space inside each protrusion 53 f faces each mounting leg 13 k in the axial direction of the rotating shaft 15. Further, the exhaust guide cylinder portion 53 is formed with a notch 53k for avoiding interference with the bulging wall 13d of the second motor bracket 13. Three cylindrical insertion cylinders 54 are formed on the end face 52a of the main body 52 facing the inverter case 21 so as to protrude.

As shown in FIG. 4, each insertion tube 54 has a large diameter tube 54a, a step 54b, a small diameter tube 54c, and a tapered tube 54d. The large diameter tube 54 a is continuous with the end surface 52 a of the main body 52 and extends in the axial direction of the rotary shaft 15. The step 54b has an annular shape extending in the radial direction of the rotary shaft 15 and is continuous with the end of the large diameter tube 54a opposite to the main body 52. The small diameter cylinder 54 c is continuous with the inner peripheral portion of the step 54 b and extends in the axial direction of the rotary shaft 15. The small diameter cylinder 54c has an outer diameter smaller than the outer diameter of the large diameter cylinder 54a. The tapered cylinder 54d is continuous with the end of the small diameter cylinder 54c opposite to the step 54b and has an outer diameter that gradually decreases as the distance from the small diameter cylinder 54c increases.

The inner peripheral surface of each insertion tube 54 constitutes a circular third insertion hole 54h through which each motor wiring 19 is inserted in the axial direction of the rotary shaft 15. Therefore, the rectifying member 50 has three third insertion holes 54h. As shown in FIG. 3, each third insertion hole 54 h is open to an end surface of the main body 52 that faces the second motor bracket 13.

As shown in FIGS. 4 and 5, the inner peripheral surface 54 i of the third insertion hole 54 h is between the end surface of the main body portion 52 facing the second motor bracket 13 and the step 54 b of the insertion tube 54. Tapering from the end surface facing the second motor bracket 13 toward the tip of the insertion tube 54. As shown in FIG. 5, the small-diameter cylinder 54 c and the tapered cylinder 54 d of each insertion cylinder 54 are inserted into the second insertion holes 24 h and project into the second space 222 in the inverter case 21. The space inside the tapered cylinder 54 d of each insertion cylinder 54 faces the connection hole 25 a of each inverter terminal 25 in the axial direction of the rotary shaft 15.

As shown in FIGS. 3 and 5, the end surface of the main body 52 that faces the second motor bracket 13 includes a first contact surface 55 that contacts the first end surface 11a around the three third insertion holes 54h. . Therefore, the rectifying member 50 has the first contact surface 55 that contacts the first end surface 11a around the three third insertion holes 54h. The first contact surface 55 faces the first end surface 11 a in the axial direction of the rotation shaft 15. As shown in FIG. 3, the first contact surface 55 is continuous with the notch 53k.

A first seal member 61 is provided between the first end surface 11a and the first contact surface 55. The first seal member 61 is a rubber gasket having a long rectangular frame shape. The first seal member 61 is formed with three frame-shaped insertion portions 61a through which the three motor wires 19 are inserted. Each insertion portion 61 a is disposed around each first insertion hole 11 h in the first end surface 11 a and around each third insertion hole 54 h in the first contact surface 55.

The first contact surface 55 is formed with a first seal member holding groove 55a for holding the first seal member 61. The first seal member holding groove 55a is formed on the first contact surface 55 so as to surround each third insertion hole 54h.

As shown in FIG. 5, the first seal member 61 is held in the first seal member holding groove 55a by being mounted in the first seal member holding groove 55a. The first seal member 61 is in close contact with the first seal member holding groove 55a. The first end surface 11a and the first contact surface 55 come into contact with each other, whereby the first seal member 61 is crushed between the first end surface 11a and the first seal member holding groove 55a. It adheres to 11a. The first seal member 61 suppresses entry of foreign matters such as water into the first insertion holes 11h via the boundary between the first end surface 11a and the first contact surface 55. In addition, the first seal member 61 suppresses entry of foreign matters such as water into the third insertion holes 54 h via the boundary between the first end surface 11 a and the first contact surface 55.

2 and 5, the end surface of the step 54b of each insertion tube 54 is a second contact surface 56 that contacts the second end surface 24 around each third insertion hole 54h. Therefore, the rectifying member 50 has the second contact surface 56 that contacts the second end surface 24 around each third insertion hole 54h. Each second contact surface 56 faces the second end surface 24 in the axial direction of the rotation shaft 15.

A second seal member 62 is provided between each second end surface 24 and each second contact surface 56. As shown in FIG. 2, each second seal member 62 is an annular rubber seal member. Each second contact surface 56 is formed with a second seal member holding groove 56 a that holds each second seal member 62. Each second seal member holding groove 56a is formed on the second contact surface 56 so as to surround each third insertion hole 54h.

As shown in FIG. 5, each second seal member 62 is held in each second seal member holding groove 56a by being mounted in each second seal member holding groove 56a. Each second seal member 62 is in close contact with each second seal member holding groove 56a. Each second end surface 24 and each second contact surface 56 contact each other, whereby each second seal member 62 is crushed between each second end surface 24 and each second seal member holding groove 56a. In close contact with each second end surface 24. And each 2nd seal member 62 is suppressing the penetration | invasion of foreign materials, such as water, to each 2nd penetration hole 24h via between each 2nd end surface 24 and each 2nd contact surface 56. As shown in FIG.

As shown in FIG. 2, the inverter-integrated dynamoelectric machine 10 of the present embodiment is configured by assembling a rectifying member 50 and an inverter case 21 in order in the axial direction of the rotary shaft 15 with respect to the second motor bracket 13. Has been. The inverter case 21 and the rectifying member 50 are assembled to the second motor bracket 13 by screws 57 that pass through the plurality of mounting legs 27 and the rectifying member 50 of the inverter case 21 and are screwed into the plurality of mounting legs 13k. Yes. Therefore, the inverter case 21 and the rectifying member 50 are connected to the housing 11 in the axial direction of the rotating shaft 15.

As shown in FIG. 1, the exhaust guide cylinder portion 53 of the rectifying member 50 covers the outer peripheral surface of the cylinder portion 13 b of the second motor bracket 13. An exhaust passage 58 is formed between the inner peripheral surface of the exhaust guide tube portion 53 and the outer peripheral surface of the tube portion 13 b of the second motor bracket 13. The exhaust passage 58 communicates with the plurality of rectifying holes 51.

As shown in FIG. 5, the end of each motor wiring 19 opposite to the second coil end 182b passes through the inside of the insulating member 11g, each first insertion hole 11h, and each third insertion hole 54h. It protrudes into the second space 222 of the inverter case 21 and is inserted into the connection hole 25 a of each inverter terminal 25. Here, the small-diameter cylinder 54c and the tapered cylinder 54d of each insertion cylinder 54 forming each third insertion hole 54h are inserted into each second insertion hole 24h. That is, it can be said that each motor wiring 19 passing through each third insertion hole 54h passes through each second insertion hole 24h.

The end portions of the motor wires 19 inserted into the connection holes 25a and the second ends of the inverter terminals 25 are fastened from the axial direction of the rotary shaft 15 by the nuts 25b. Each inverter terminal 25 is electrically connected. Thereby, each motor wiring 19 and the inverter 20 are electrically connected via each inverter terminal 25. Therefore, each motor wiring 19 is electrically connected to the inverter 20. And the connection hole 25a of each inverter terminal 25 is an electrical connection part with each motor wiring 19 in the inverter 20. FIG.

The inner peripheral surface 54 i of each third insertion hole 54 h is a guide surface 59 that guides each motor wiring 19 toward the connection hole 25 a of each inverter terminal 25. Specifically, the inner peripheral surface 54 i of each third insertion hole 54 h, that is, each guide surface 59 is inserted from the end surface 52 b of the main body portion 52 between the end surface 52 b of the main body portion 52 and the step 54 b of the insertion tube 54. The taper is tapered toward the tip of the tube 54. Therefore, since each guide surface 59 is tapered as it approaches the connection hole 25a of each inverter terminal 25, each guide surface 59 is compared with the case where each guide surface 59 extends linearly in the axial direction of the rotary shaft 15. The motor wiring 19 is easily guided to the connection hole 25a of each inverter terminal 25.

As shown in FIG. 2, when the rectifying member 50 and the inverter case 21 are assembled to the second motor bracket 13, the first cover member 23a prevents foreign matter from entering the first space 221 by the gasket 23c. In this state, it is attached to the case main body 22 in advance. The second cover member 23b is not attached to the case body 22 when the rectifying member 50 and the inverter case 21 are assembled to the second motor bracket 13, and the opening of the second space 222 in the case body 22 is not attached. It is in an open state. The second cover member 23 b is attached to the case main body 22 after the end of each motor wiring 19 in each nut 25 b and each inverter terminal 25 are fastened.

When the rectifying member 50 and the inverter case 21 are assembled to the second motor bracket 13, the first seal member 61 is held in the first seal member holding groove 55a, and the second seal member 62 is It is held in the second seal member holding groove 56a. Therefore, the rectifying member 50 and the inverter case 21 are sequentially assembled with respect to the second motor bracket 13 in the axial direction of the rotary shaft 15, and at the same time, the boundary between the second motor bracket 13 and the inverter case 21 is The first seal member 61, the rectifying member 50, and the second seal member 62 are sealed.

Next, the operation of this embodiment will be described.
When electric power is supplied from the inverter 20 to the U-phase, V-phase, and W-phase coils 18b via the inverter terminals 25 and the motor wirings 19, a rotating magnetic field is generated in the stator 18 and the rotor 17 rotates. Thereby, the rotating shaft 15 rotates integrally with the rotor 17. Then, the cooling fan 40 fixed to the rotating shaft 15 rotates as the rotating shaft 15 rotates. The rotation of the cooling fan 40 introduces air from the radially outer side of the rotating shaft 15 toward the axis L of the rotating shaft 15 as indicated by a two-dot chain line R1 in FIG. At this time, heat exchange is performed between the air and the fins 32 of the heat sink 30. Then, the heat generated in the inverter 20 is released into the air through the heat sink 30, and the inverter 20 is cooled. The air having undergone heat exchange in the fins 32 flows toward the cooling fan 40 through the plurality of rectifying holes 51 and is discharged to the outside through the exhaust passage 58.

In the above embodiment, the following effects can be obtained.
(1) In the inverter-integrated rotating electrical machine 10, the rectifying member 50 and the inverter case 21 are sequentially assembled to the housing 11 in the axial direction of the rotating shaft 15, and at the same time, the boundary between the housing 11 and the inverter case 21. Is sealed through the first seal member 61, the rectifying member 50, and the second seal member 62. Therefore, even in the inverter-integrated rotating electrical machine 10 having the configuration in which the rectifying member 50 is disposed between the heat sink 30 and the cooling fan 40 in the axial direction of the rotating shaft 15, the interiors of the housing 11 and the inverter case 21 are respectively included. The seal structure for sealing can be simplified, and the assembly of the inverter-integrated dynamoelectric machine 10 can be facilitated.

(2) The first contact surface 55 is formed with a first seal member holding groove 55a for holding the first seal member 61. According to this, the rectifying member 50 and the inverter case 21 are sequentially assembled to the housing 11 in the axial direction of the rotary shaft 15 with the first seal member 61 held in the first seal member holding groove 55a. Therefore, the assembly of the inverter-integrated dynamoelectric machine 10 can be further facilitated.

(3) On the second contact surface 56, a second seal member holding groove 56a for holding the second seal member 62 is formed. According to this, the rectifying member 50 and the inverter case 21 are sequentially assembled to the housing 11 in the axial direction of the rotary shaft 15 with the second seal member 62 held in the second seal member holding groove 56a. Therefore, the assembly of the inverter-integrated dynamoelectric machine 10 can be further facilitated.

(4) The inner peripheral surface 54i of each third insertion hole 54h is a guide surface 59 that guides each motor wiring 19 toward the connection hole 25a of each inverter terminal 25. According to this, when the rectifying member 50 and the inverter case 21 are sequentially assembled to the housing 11 in the axial direction of the rotary shaft 15, each motor wiring 19 is connected to each inverter terminal 25 connection hole by each guide surface 59. Since it becomes easy to guide to 25a, the assembly | attachment of the inverter integrated rotary electric machine 10 can be made still easier.

(5) The guide surface 59 is the inner peripheral surface 54i of the third insertion hole 54h. According to this, while each motor wiring 19 extending to the outside of the housing 11 from each first insertion hole 11h is guided to the connection hole 25a of each inverter terminal 25 by the inner peripheral surface 54i of each third insertion hole 54h. The rectifying member 50 and the inverter case 21 can be sequentially assembled to the housing 11 in the axial direction of the rotary shaft 15. Therefore, the assembly of the inverter-integrated dynamoelectric machine 10 can be further facilitated.

(6) The guide surface 59 tapers as it approaches the connection hole 25a of the inverter terminal 25. This makes it easier to guide the motor wiring 19 to the connection hole 25a of the inverter terminal 25 than when the guide surface 59 extends linearly in the axial direction of the rotary shaft 15, for example. The assembly of the body type rotary electric machine 10 can be further facilitated.

(7) When the rectifying member 50 and the inverter case 21 are assembled to the second motor bracket 13, the first cover member 23a is attached in advance to the case body 22 via the gasket 23c. Therefore, when the rectifying member 50 and the inverter case 21 are assembled to the second motor bracket 13, the gasket 23 c prevents foreign matter from entering the first space 221 in which the inverter 20 is accommodated. There is no need to perform assembly work in the environment. Therefore, the cost of the assembly work of the inverter-integrated rotating electrical machine 10 can be suppressed.

(8) The end of each motor wiring 19 in each nut 25b and each inverter terminal 25 are fastened in the axial direction of the rotary shaft 15 by each nut 25b. For this reason, compared with the structure by which the edge part of each motor wiring 19 and each inverter terminal 25 are made | formed in the radial direction of the rotating shaft 15, the radial physique of the rotating shaft 15 of the inverter integrated rotary electric machine 10 is made. It can be downsized.

In addition, you may change the said embodiment as follows.
As shown in FIG. 6, the insertion cylinder 54 may not be provided in the rectifying member 50, and the insertion cylinder 13 p that protrudes toward the rectification member 50 may be formed in the second motor bracket 13. A third insertion hole 54 h is formed through the body 52 of the rectifying member 50. The insertion cylinder 13p extends toward the third insertion hole 54h. The second motor bracket 13 has an insulating member 11g provided inside the insertion tube 13p. The inner side of the insulating member 11g functions as the first insertion hole 11h. Furthermore, the inner peripheral surface 11 i of the first insertion hole 11 h functions as the guide surface 59, and the guide surface 59 may taper as it approaches the connection hole 25 a of the inverter terminal 25.

Further, the guide surface 59 may be formed by the inner peripheral surface 11i of the first insertion hole 11h and the inner peripheral surface 54i of the third insertion hole 54h. In short, at least one of the inner peripheral surface 11i of the first insertion hole 11h and the inner peripheral surface 54i of the third insertion hole 54h is a guide surface that guides the motor wiring 19 toward the connection hole 25a of the inverter terminal 25. Just do it.

As shown in FIG. 7, the rectifying member 50 may have a cylindrical insertion portion 50A that is inserted into the first insertion hole 11h. According to this, the insulation between the portion of the motor wiring 19 positioned inside the first insertion hole 11h and the second motor bracket 13 can be ensured by the insertion portion 50A. Therefore, it is not necessary to separately provide an insulating member that secures insulation between the portion of the motor wiring 19 positioned inside the first insertion hole 11h and the second motor bracket 13 inside the second motor bracket 13, and the inverter The configuration of the integrated rotary electric machine 10 can be simplified.

In the embodiment, the first seal member holding groove 55a may not be formed on the first contact surface 55 but may be formed on the first end surface 11a.
In the embodiment, the first sealing member holding groove 55 a may not be formed on the first contact surface 55.

In the embodiment, the second seal member holding groove 56 a may not be formed on the second contact surface 56 but may be formed on the second end surface 24.
In the embodiment, the second seal member holding groove 56 a may not be formed on the second contact surface 56.

In the embodiment, the rectifying member 50 is not provided with the insertion tube 54, and may be, for example, the rectifying member 50 formed by penetrating the third insertion hole 54h in the main body portion 52. The third insertion hole The inner peripheral surface 54 i of 54 h may not function as the guide surface 59.

In the embodiment, the guide surface 59 may extend linearly in the axial direction of the rotating shaft 15, for example.
In the embodiment, the inverter case 21 in which the inside of the case main body 22 is not partitioned into the first space 221 and the second space 222 by the partition wall 22c may be used.

In the embodiment, the shape of the rectifying hole 51 is not particularly limited, and may be a fan-shaped triangle or a circle.
○ In the embodiment, even if the three first insertion holes 11h are not formed in the blocking wall 13f, only one first insertion hole 11h having a size through which the three motor wires 19 can be inserted is formed. Good.

In the embodiment, the three straight insertion holes 54h may not be formed in the rectifying member 50, and only one third through hole having a size that allows the three motor wires 19 to be inserted may be formed. .

In the embodiment, the end portion of each motor wiring 19 and each inverter terminal 25 may be fastened in the radial direction of the rotating shaft 15. For example, a terminal block for connecting the motor wiring 19 to the inverter 20 is provided on the outer peripheral surface of the inverter case 21, and the inverter terminal installed on the terminal block and the motor wiring 19 are fastened in the radial direction of the rotary shaft 15. It may be a configuration.

In the embodiment, the inverter case 21 and the heat sink 30 may be integrally formed by, for example, aluminum die casting.

Claims

A cylindrical housing that rotatably supports the rotating shaft;
A rotor that rotates integrally with the rotating shaft;
A stator fixed to the inner peripheral surface of the housing;
An inverter case connected to the housing in the axial direction of the rotating shaft and accommodating an inverter;
Motor wiring configured to be drawn from the stator coil and electrically connected to the inverter;
A heat sink provided in the inverter case between the housing and the inverter case in the axial direction of the rotating shaft, and configured to be thermally coupled to the inverter;
A cooling fan fixed to the rotating shaft between the heat sink and the housing in the axial direction of the rotating shaft, and capable of rotating and sucking air with rotation of the rotating shaft;
An inverter-integrated dynamoelectric machine comprising: a rectifying member that is disposed between the heat sink and the cooling fan in the axial direction of the rotating shaft and has a rectifying hole that rectifies air between the heat sink and the cooling fan. Because
The housing has a first end surface, and the first end surface has a first insertion hole through which the motor wiring is inserted in the axial direction of the rotating shaft,
The inverter case has a second end surface, and the second end surface has a second insertion hole through which the motor wiring is inserted in the axial direction of the rotating shaft,
The rectifying member includes a third insertion hole through which the motor wiring is inserted in the axial direction of the rotation shaft, a first contact surface that contacts the first end surface around the third insertion hole, and the third A second abutting surface that abuts on the second end surface around the insertion hole,
The inverter-integrated electric rotating machine is
A first seal member provided between the first end surface and the first contact surface;
An inverter-integrated dynamoelectric machine comprising: a second seal member provided between the second end surface and the second contact surface.
The inverter-integrated dynamoelectric machine according to claim 1, wherein a first seal member holding groove for holding the first seal member is formed on the first contact surface.
The inverter-integrated dynamoelectric machine according to claim 1 or 2, wherein a second seal member holding groove for holding the second seal member is formed on the second contact surface.
At least one of the inner peripheral surface of the first insertion hole and the inner peripheral surface of the third insertion hole is a guide surface that guides the motor wiring toward an electrical connection portion with the motor wiring in the inverter. The inverter-integrated dynamoelectric machine according to any one of claims 1 to 3.
The inverter-integrated rotating electrical machine according to claim 4, wherein the guide surface is an inner peripheral surface of the third insertion hole.
6. The inverter-integrated dynamoelectric machine according to claim 4 or 5, wherein the guide surface tapers as it approaches the electrical connection portion.
The rectifying member is made of resin, and the housing is made of metal,
The inverter-integrated dynamoelectric machine according to any one of claims 1 to 6, wherein the rectifying member has a cylindrical insertion portion that is inserted into the first insertion hole.