WO2016117513A1 - 電動モータユニット及び車両用駆動ユニット - Google Patents
電動モータユニット及び車両用駆動ユニット Download PDFInfo
- Publication number
- WO2016117513A1 WO2016117513A1 PCT/JP2016/051322 JP2016051322W WO2016117513A1 WO 2016117513 A1 WO2016117513 A1 WO 2016117513A1 JP 2016051322 W JP2016051322 W JP 2016051322W WO 2016117513 A1 WO2016117513 A1 WO 2016117513A1
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- WIPO (PCT)
- Prior art keywords
- electric motor
- neutral point
- terminal portions
- section
- cross
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
Definitions
- the present invention relates to an electric motor unit and a vehicle drive unit.
- a vehicle drive unit in which rotational torque generated by an electric motor is transmitted to wheels.
- an electric motor in which a plurality of bus bars corresponding to U-phase, V-phase, and W-phase coils and a neutral point bus bar that connects the coils to each other are unitized.
- the unit is known.
- a plurality of bus bars are arranged in the same direction as the central axis of the electric motor.
- phase terminals and neutral point terminals of the respective phases constituting the coil wire terminal of the stator are alternately arranged on the circumference centering on the axis of each bus bar.
- An object of the present invention is to provide an electric motor unit and a vehicle drive unit that can be miniaturized.
- a plurality of motor coils for supplying electric power, a cylindrical stator around which each of the plurality of motor coils is wound, and the stator are provided coaxially.
- An electric motor unit provided with an electric motor having a rotor, a power supply body for connecting a power supply source and a plurality of motor coils, and a connection module having a neutral point body for connecting the plurality of motor coils to each other is provided Is done.
- the power feeder has a power distribution member in which a plurality of terminal portions are arranged, and the neutral dot has a neutral point power distribution member in which a plurality of terminal portions are arranged.
- the surface including all of the plurality of terminal portions of the sex point body is defined as the first cross section
- the surface intersecting the first cross section is defined as the second cross section direction, and when viewed from the second cross section, The distance between the two arrangements of the portions where the arrangement of the terminal portions and the arrangement of the plurality of terminal portions of the neutral dot are closest is greater than zero.
- the plurality of terminal portions of the power feeding body and the plurality of terminal portions of the neutral point body are not on the same circumference but at least shifted when viewed from the second cross section.
- the adjacent terminal portions in each of the power feeding body and the neutral point body The distance between them can be increased.
- the adjacent terminal portions of the power feeding body and the neutral point body can be brought close to each other within a range in which insulation measures can be maintained, so that the electric motor unit can be downsized.
- the plurality of terminal portions of the power feeding body and the neutral point body are arranged in a ring shape, and when viewed from the first cross section, the array of the plurality of terminal portions of the power feeding body and the plurality of neutral point bodies It is desirable that the distance between the two arrays at locations closest to the terminal section array is greater than zero.
- the plurality of terminal portions of the power feeding body and the plurality of terminal portions of the neutral dot body are shifted when viewed from the second cross section and also when viewed from the first cross section. Are shifted in the radial direction of the circle formed by the terminal portion.
- positioning of each terminal part can be easily adjusted by arranging the several terminal part of a feed body and a neutral point body in cyclic
- the power feeding body and the neutral point body are each covered with an insulating member in a state where a plurality of terminal portions are exposed, and the insulating member that covers either the power feeding body or the neutral point body includes: It is desirable that an opening is provided between specific adjacent terminal portions among the plurality of terminal portions.
- connection module is an assembly obtained by assembling an insulating member that covers the power feeding body and an insulating member that covers the neutral point body, or an insulating member that covers the power feeding body and the insulating covering the neutral point body. It is desirable that the component is a single component integrated with the member.
- the electric motor unit can be reduced in size.
- the rotational torque obtained by reducing the rotational speed of the electric motor unit and the electric motor through a plurality of gears is driven by the vehicle.
- a vehicle drive unit that includes a transmission mechanism that transmits to a wheel via a drive shaft.
- the connection module is disposed in the vicinity of the transmission mechanism of the electric motor, and a part of the transmission mechanism is disposed in the opening of the insulating member that covers either the power feeding body or the neutral point body.
- Part of the transmission mechanism includes the transmission mechanism itself (housing), a plurality of gears constituting the transmission mechanism, parts related to the shaft, and the like. According to the above configuration, since a part of the transmission mechanism can be disposed in the opening, the electric motor unit and the transmission mechanism can be unitized as compared with a case where there is no opening. Further, by reducing the electric motor unit within a range in which insulation measures can be maintained, the vehicle drive unit can be reduced in size. In addition, when the vehicle drive unit is mounted on the vehicle, it is possible to sufficiently ensure the minimum ground height that is the vertical distance from the ground surface to the lowest point of the vehicle.
- the electric motor is driven by the power supplied from the supply source to the power feeding body via the connector, thereby generating a rotational torque by rotating the output shaft inserted into the rotor
- the outer diameter of the body is preferably equal to or smaller than the outer diameter of the stator, and the inner diameter of the power feeding body is preferably equal to or larger than the outer diameter of the output shaft.
- the connector when the connector is arranged with respect to the power feeding body, the connector can be arranged in the vicinity of the output shaft of the electric motor. In this case, the amount of the connector protruding from the outer diameter of the electric motor can be reduced. Thereby, size reduction of the drive unit for vehicles can be achieved.
- the transmission mechanism has a plurality of rotation shafts that serve as rotation shafts of a plurality of gears, and the plurality of rotation shafts are connected to an output shaft inserted into the rotor, and an input shaft.
- the center axis of the input shaft, the intermediate shaft, and the drive shaft are arranged on the same plane. It is desirable.
- a part of a transmission mechanism such as a plurality of rotating shafts and gears of the rotating shaft is disposed in the opening of the insulating member.
- the transmission mechanism having the rotation shaft such as the input shaft, the intermediate shaft, and the drive shaft can be unitized with the electric motor unit as close as possible. Accordingly, it is possible to reduce the size of the vehicle drive unit, and it is possible to sufficiently ensure the minimum ground clearance when the vehicle drive unit is mounted on the vehicle.
- the vehicle drive unit can be flattened by arranging the axes on the same plane. Thereby, it becomes easy to ensure the space of the chassis part and vehicle body structure part which form the cargo compartment of a vehicle.
- the electric motor unit and the transmission mechanism are accommodated in a common housing. According to the said structure, compared with the case where the electric motor unit and the transmission mechanism are each accommodated in the some housing, it can unitize in the state which brought the electric motor unit and the transmission mechanism further closer.
- a bearing that rotatably supports the output shaft inserted into the rotor is provided on the radially inner side of the power feeding body, and the inner diameter of the power feeding body is preferably equal to or larger than the outer diameter of the bearing. .
- the electric motor unit and the transmission mechanism can be unitized as close as possible.
- the power feeding body and the transmission mechanism are arranged so as to overlap in the axial direction of the output shaft inserted into the rotor. According to the above configuration, the electric motor unit and the transmission mechanism can be unitized while being as close as possible in the axial direction of the output shaft of the electric motor.
- the electric motor unit and the vehicle drive unit can be reduced in size.
- FIG. 2 is a sectional view taken along line II-II in FIG.
- the fragmentary sectional view which expands and shows the connection module of an electric motor unit.
- the fragmentary sectional view which expands and shows the connection module of an electric motor unit.
- the disassembled perspective view of the electric power feeding bus bar which comprises a connection module.
- the front view of a feeding bus bar The disassembled perspective view of the neutral point bus bar which comprises a connection module.
- (A) is a perspective view of a connection module
- (b) is a schematic diagram which shows the connection specification of a connection module.
- the vehicle drive unit 10 is mounted on, for example, a front and rear wheel drive vehicle that obtains the driving force of the rear wheels from the rotational torque generated by the electric motor 11 ⁇ / b> A of the electric motor unit 11.
- the vehicle drive unit 10 is disposed between drive wheels 12 and 13 that are rear wheels.
- the vehicle drive unit 10 is disposed on the lower side facing the ground at the rear of the vehicle in a state in which the minimum ground clearance is sufficiently secured.
- the electric motor unit 11 and the transmission mechanism 14 are unitized.
- the electric motor unit 11 includes an electric motor 11A that generates rotational torque when supplied with driving power, and a connection module 11B that connects the electric motor 11A and a power supply source.
- the transmission mechanism 14 includes a plurality of gears for transmitting rotational torque obtained by decelerating the rotation speed of the electric motor 11A to the drive wheels 12 and 13, and a plurality of rotation shafts serving as the rotation shafts of the respective gears. ing.
- the electric motor unit 11 and the transmission mechanism 14 are accommodated in a common housing 15.
- the housing 15 includes a cylindrical gear housing 15a and a motor housing 15b having a housing opening 15c.
- the gear housing 15a is fastened to the motor housing 15b by bolts or the like.
- the cover 15d is assembled to the motor housing 15b with a bolt or the like so as to close the housing opening 15c.
- the transmission mechanism 14 includes an input shaft 17 as a rotation shaft that inputs rotational torque generated by the electric motor 11 ⁇ / b> A to the transmission mechanism 14.
- the electric motor 11A includes an output shaft 16 that outputs rotational torque.
- the input shaft 17 is mechanically connected to an end portion 16 d of the output shaft 16 near the transmission mechanism 14.
- the input shaft 17 is rotatably supported by a bearing 17a fixed to the gear housing 15a and a bearing 17b fixed to the motor housing 15b.
- the motor housing 15 b has a bearing holder portion 15 e around the output shaft 16.
- the bearing 17b is fixed in the vicinity of the transmission mechanism 14 of the bearing holder portion 15e.
- An input gear 21 is fixed to the input shaft 17 so as to be rotatable integrally with the input shaft 17.
- the first intermediate gear 22 is meshed with the input gear 21.
- a first intermediate gear 22 is fixed to the intermediate shaft 18 so as to be rotatable integrally with the intermediate shaft 18.
- the intermediate shaft 18 is disposed in parallel to the output shaft 16 and the input shaft 17.
- the intermediate shaft 18 is rotatably supported by a bearing 18a fixed to the gear housing 15a and a bearing 18b fixed to the motor housing 15b.
- the motor housing 15 b has a bearing holder portion 15 f around the intermediate shaft 18.
- the bearing 18b is fixed to the bearing holder portion 15f.
- a second intermediate gear 23 is fixed between the first intermediate gear 22 and the bearing 18 b so as to rotate integrally with the intermediate shaft 18.
- the output gear 26 is meshed with the second intermediate gear 23.
- the output gear 26 is fixed to a differential carrier 25 of a differential gear (hereinafter referred to as “diff”) 24 so as to be integrally rotatable with the differential carrier 25.
- the differential 24 is accommodated in the differential accommodating portion 15g of the motor housing 15b, and is provided so that the bearing holder portion 15f is disposed between the differential 24 and the bearing holder portion 15e.
- the differential carrier 25 is rotatably supported by a bearing 25a fixed to the gear housing 15a and a bearing 25b fixed to the motor housing 15b.
- the differential 24 includes a pair of pinion gears 27 and 28 that can rotate within the differential carrier 25, and a pair of side gears 29 and 30 that mesh with the pair of pinion gears 27 and 28.
- a drive shaft 19 as a drive shaft is fixed to the side gear 29 so as to be rotatable integrally with the side gear 29.
- the drive shaft 19 is disposed in parallel to the output shaft 16, the input shaft 17, and the intermediate shaft 18.
- the drive wheel 12 is mechanically connected to the drive shaft 19.
- a gasket 19a is fixed in the vicinity of the drive wheel 12 of the drive shaft 19 to prevent the lubricating oil in the transmission mechanism 14 from leaking.
- a drive shaft 20 as a drive shaft is fixed to the side gear 30 so as to be rotatable integrally with the side gear 30.
- the drive shaft 20 is disposed in parallel to the output shaft 16, the input shaft 17, and the intermediate shaft 18.
- a drive wheel 13 is mechanically coupled to the drive shaft 20.
- a gasket 20a is also fixed in the vicinity of the drive wheel 13 of the drive shaft 20 to prevent the lubricating oil in the transmission mechanism 14 from leaking.
- the drive shafts 19 and 20 are respectively connected to the drive wheels 12 and 13 via a joint mechanism such as a flange joint (not shown).
- a cylindrical stator 40 formed with a plurality of teeth is fixed in the vicinity of the housing opening 15c.
- a plurality of motor coils 41 are wound around each tooth via insulators.
- the first ends of the lead wires of the motor coils 41 are respectively connected to phase terminal portions 61, 71, 81, which will be described later, of the corresponding phases among the three phases U phase, V phase, and W phase.
- a second end of the lead wire of each motor coil 41 is connected to each neutral point terminal portion 101 described later.
- Each motor coil 41 is star-connected (Y-connected).
- a cylindrical rotor 42 that rotates integrally with the output shaft 16 is provided on the radially inner side of the stator 40.
- the rotor 42 is attached to the outer peripheral surface of the output shaft 16.
- the output shaft 16 is inserted inside the rotor 42.
- a plurality of permanent magnets are fixed to the outer periphery of the rotor 42 so that the N poles and the S poles are alternately arranged along the circumferential direction.
- the output shaft 16 is rotatably supported by a bearing 16a fixed to the cover 15d and a bearing 16b fixed to the motor housing 15b.
- the bearing 16b is fixed in the vicinity of the electric motor 11A in the bearing holder portion 15.
- the electric motor 11A is an inner rotor type motor.
- a gasket (not shown) is fixed between the bearing 16b and the bearing 17b in order to prevent the lubricating oil in the transmission mechanism 14 from leaking.
- a resolver 43 that detects the rotation angle of the rotor 42 is provided at an end 16 c opposite to the transmission mechanism 14.
- the resolver 43 is disposed in the cover 15d.
- the resolver 43 is arranged coaxially with the rotor 42.
- a resolver stator 43a is fixed on the radially inner side of the cover 15d.
- a cylindrical resolver rotor 43b that rotates integrally with the output shaft 16 is provided on the radially inner side of the resolver stator 43a.
- the resolver rotor 43 b is attached to the outer peripheral surface of the output shaft 16. In other words, the output shaft 16 is inserted inside the resolver rotor 43b.
- the connection module 11 ⁇ / b> B is provided at an end 16 d of the output shaft 16 near the transmission mechanism 14.
- the connection module 11B is formed in a ring shape by modularizing a plurality of bus bars.
- the connection module 11 ⁇ / b> B includes a cylindrical power supply bus bar 51 as a power supply body and a disk-shaped neutral point bus bar 52 as a neutral point body.
- the power supply bus bar 51 connects a first end of each motor coil 41 and an inverter Inv, which is a source of driving power for the electric motor 11A, via a connector CN (each supply unit 60a, 70a, 80a described later).
- a control circuit for controlling the operation of the inverter Inv is connected to the inverter Inv.
- the neutral point bus bar 52 connects the second ends which are opposite to the first ends of the motor coils 41 to each other.
- the connector CN protrudes outward from the motor housing 15b.
- the connector CN is provided in the vicinity of the transmission mechanism 14 in the electric motor 11A.
- the inner diameters of the power supply bus bar 51 and the neutral point bus bar 52 are equal to or larger than the outer diameter of the bearing holder portion 15e (bearing 16b) of the motor housing 15b, and in this embodiment, the bearing holder portion. It is larger than the outer diameter of 15e.
- the outer diameter of the bearing holder portion 15e (bearing 16b) of the motor housing 15b is larger than the outer diameter of the output shaft 16.
- the inner diameters of the power supply bus bar 51 and the neutral point bus bar 52 are equal to or larger than the outer diameter of the output shaft 16 and are larger than the outer diameter of the output shaft 16 in this embodiment.
- outer diameters of the power supply bus bar 51 and the neutral point bus bar 52 are equal to or smaller than the outer diameter of the stator 40 and are smaller than the outer diameter of the stator 40 in the present embodiment.
- the outer diameter of the neutral point bus bar 52 is equal to or larger than the outer diameter of the power supply bus bar 51 and is larger than the outer diameter of the power supply bus bar 51 in the present embodiment.
- a bearing holder portion 15e that protrudes from the motor housing 15b toward the electric motor 11A is inserted inside the connection module 11B in the radial direction. Further, a bearing 16b is inserted along with the output shaft 16 on the radially inner side of the connection module 11B.
- connection module 11B has a shape in which the power supply bus bar 51 protrudes toward the transmission mechanism 14, and is formed in an L shape (top hat shape) in a cross-sectional view.
- the connection module 11B is fixed in the vicinity of the transmission mechanism 14 of the electric motor 11A by a predetermined fixing method.
- the power supply bus bar 51 is disposed between the neutral point bus bar 52 and the transmission mechanism 14, and is accommodated in a space near the transmission mechanism 14 on the radially inner side of the motor housing 15b. Specifically, the power supply bus bar 51 is accommodated in a space between the output shaft 16 and the intermediate shaft 18 on the radially outer side of the output shaft 16. The power supply bus bar 51 is also accommodated in a space between the output shaft 16 and the connector CN on the radially outer side of the output shaft 16. Further, the neutral point bus bar 52 is disposed between the power supply bus bar 51 and the electric motor 11A in the connection module 11B, and is accommodated in a space near the electric motor 11A on the radially inner side of the motor housing 15b.
- an opening 53 for avoiding interference with the bearing 18b and the bearing holder portion 15f constituting the transmission mechanism 14 is provided in the vicinity of the differential 24 of the power supply bus bar 51.
- the thickness L2 of the portion corresponding to the opening 53 of the power supply bus bar 51 is smaller by the thickness L3 than the thickness L1 of other portions. That is, the outer diameter of the part corresponding to the opening 53 of the power supply bus bar 51 is smaller than the outer diameter of the other part.
- the opening 53 covers a range of not more than half of the entire circumference of the power supply bus bar 51, for example, 1/8 of the entire circumference (45 ° in circumferential angle). Is provided.
- a bearing holder portion 15f is disposed together with the bearing 18b.
- the power supply bus bar 51 is accommodated in a space between the output shaft 16 and the intermediate shaft 18 by disposing the bearing holder portion 15 f in the opening 53.
- the transmission mechanism 14 and the line module 11B are disposed so as to overlap with the axial direction of the output shaft 16 by a distance L4.
- the intermediate shaft end surface 18c in the vicinity of the electric motor 11A of the intermediate shaft 18 that is the end surface of the transmission mechanism 14 and the bus bar end surface 51a in the vicinity of the transmission mechanism 14 that is the end surface of the connection module 11B are separated by a distance L4. Is arranged.
- the power supply bus bar 51 includes a U-phase power supply collar 60, a V-phase power supply collar 70, and a W-phase power supply collar 80 made of a metal plate such as a copper plate.
- the power supply bus bar 51 is held by a power supply color holder 90 as an insulator made of an insulating material such as a resin material.
- Each phase feeding collar 60, 70, 80 is a power distribution member for electrically connecting the first end of the lead wire of the motor coil 41 connected to the phase terminal portions 61, 71, 81 of each phase and the connector CN. It is.
- Plate-shaped supply portions 60a, 70a, and 80a extend from the respective phase power feeding collars 60, 70, and 80 toward the connector CN.
- Each supply part 60a, 70a, 80a supplies the electric power corresponding to each phase from inverter Inv.
- the U-phase power feeding collar 60 includes a main body 60b formed by bending a metal plate into a C shape. A gap between a pair of end portions 60c facing each other in the circumferential direction of the main body portion 60b forms a joint portion 60d.
- the main body portion 60b is provided with six U-phase terminal portions 61 connected to the first end of the lead wire of the motor coil 41 corresponding to the U-phase.
- Each U-phase terminal portion 61 is arranged in an annular shape along the circumferential direction of the main body portion 60b.
- Each U-phase terminal portion 61 is arranged so as to form an open line starting from one end 60c forming the joint portion 60d and ending at the other end 60c, that is, a circular chord.
- Each U-phase terminal portion 61 is arranged on the open line at equal intervals in the circumferential direction of the main body portion 60b.
- the V-phase power supply collar 70 also includes a main body portion 70b formed by bending a metal plate into a C shape. A gap between a pair of end portions 70c facing each other in the circumferential direction of the main body portion 70b forms a joint portion 70d.
- the main body portion 70b is provided with six V-phase terminal portions 71 connected to the first end of the lead wire of the motor coil 41 corresponding to the V-phase. Each V-phase terminal portion 71 is arranged in an annular shape along the circumferential direction of the main body portion 70b. In the main body portion 70b, when one end portion 70c forming the joint portion 70d is a start point and the other end portion 70c is an end point, the both end portions 70c form an open line, that is, a circular chord. Each V-phase terminal portion 71 is arranged on the open line at equal intervals in the circumferential direction of the main body portion 70b.
- the W-phase power supply collar 80 also includes a main body 80b formed by bending a metal plate into a C shape. A gap between a pair of end portions 80c facing each other in the circumferential direction of the main body portion 80b forms a joint portion 80d.
- the main body portion 80b is provided with six W-phase terminal portions 81 connected to the first end of the lead wire of the motor coil 41 corresponding to the W-phase. Each W-phase terminal portion 81 is arranged in an annular shape along the circumferential direction of the main body portion 80b. In the main body portion 80b, when one end portion 80c forming the joint portion 80d is a start point and the other end portion 80c is an end point, both end portions 80c form an open line, that is, a circular chord. Each W-phase terminal portion 81 is arranged on the open line at equal intervals in the circumferential direction of the main body portion 80b.
- the feeding color holder 90 includes a holder main body 90a in which an insulating material is formed into a cylindrical shape. An opening 53 is provided at a predetermined position of the holder main body 90a. In the portion excluding the opening 53 of the holder main body 90a, three holding grooves 91 to 93 for holding the phase feeding collars 60, 70, 80 are provided in order from the radially inner side of the holder main body 90a. .
- the holding grooves 91 to 93 extend along the circumferential direction of the holder main body 90a, and open to one side of the holder main body 90a in the axial direction.
- a plurality of guide grooves 94 for guiding the wiring of each motor coil 41 are provided on the outer peripheral surface excluding the opening 53 of the holder main body 90a.
- a total of 18 guide grooves 94 are provided, each having six phases.
- Each guide groove 94 extends along the axial direction of the holder main body 90a. The length of each guide groove 94 is set such that the tip of each guide groove 94 matches the tip of each phase terminal portion 61, 71, 81.
- the phase feeding collars 60, 70, 80 are held in the feeding collar holder 90.
- the main body portions 60b, 70b, 80b of the phase feeding collars 60, 70, 80 are insulated from each other.
- a holding groove 91 is provided on the innermost side in the radial direction of the holder main body 90a.
- the main body 60b is accommodated in a state where each U-phase terminal 61 is exposed.
- a holding groove 93 is provided on the outermost side in the radial direction of the holder main body 90a.
- a holding groove 92 is provided between the holding groove 91 and the holding groove 93.
- the main body portion 70 b is accommodated with each V-phase terminal portion 71 exposed.
- the holding groove 93 accommodates the main body portion 80b in a state where the W-phase terminal portions 81 are exposed.
- the joint portions 60d, 70d, and 80d of the main body portions 60b, 70b, and 80b coincide with the opening 53 of the holder main body 90a.
- the main body portions 60b and 80b of the U-phase power supply collar 60 and the W-phase power supply collar 80 are also insulated from the outside of the power supply color holder 90 by the holder main body 90a.
- phase terminal portions 61, 71, 81 are respectively drawn in the axial direction from the main body portions 60b, 70b, 80b, and then bent outward in the radial direction.
- a power supply terminal row Fr connecting the tips of the phase terminal portions 61, 71, 81 represents the outer diameter of the power supply bus bar 51.
- the diameter of the power supply terminal row Fr is equal to or smaller than the outer diameter of the stator 40 of the electric motor 11A and is equal to or larger than the outer diameter of the output shaft 16 of the electric motor 11A.
- phase terminal portions 61, 71, 81 do not overlap in the axial direction of the phase feeding collars 60, 70, 80, but overlap any one of the guide grooves 94.
- Each of the phase terminal portions 61, 71, 81 is one of a pair of end portions 60c, 70c, 80c forming the joint portions 60d, 70d, 80d, that is, the end portions 60c, 70c, which are the starting points in the clockwise direction. It is arranged in the order of U phase, V phase, and W phase from 80c.
- the terminal lengths of the phase terminal portions 61, 71, 81 pulled out from the holder main body 90a and bent are set so as to increase in the order of the W phase, the V phase, and the U phase. As a measure against insulation, a sufficient interval between adjacent terminal portions of each phase terminal portion 61, 71, 81 is secured.
- connection module 11B As shown in FIGS. 3 and 4, the axial surfaces of the holder main body 90a of the phase terminal portions 61, 71, 81 exposed from the holding grooves 91 to 93 are respectively arranged on the same plane, The bus bar end face 51a of the connection module 11B is shown.
- Each phase terminal portion 61, 71, 81 is pulled out in the axial direction from the holder main body 90a, and then bent outward in the radial direction while being separated from the holder main body 90a. Thereby, the welding operation for connecting the first end of each motor coil 41 to each phase terminal portion 61, 71, 81 can be easily performed, and the operation for adjusting the terminal length according to each motor coil 41 can be easily performed.
- the neutral point bus bar 52 includes a neutral point collar 100 made of a metal plate such as a copper plate, and a lower part 110 and a push plate 120 as an insulator that holds the neutral point collar 100 and is made of an insulating material such as a resin material. I have.
- the neutral point collar 100 is a power distribution member for connecting the second ends, which are the ends opposite to the first ends, of the motor coils 41 connected to the inverter Inv.
- the neutral point collar 100 includes a main body 100a obtained by cutting a metal plate into a circular shape or an annular shape.
- the main body portion 100a is provided with a plurality of neutral point terminal portions 101 that connect the second ends of the motor coils 41 to each other.
- a total of 18 neutral point terminal portions 101, each of which has 6 phases, are provided.
- the neutral point terminal portions 101 are arranged at equal intervals in the circumferential direction of the main body portion 100a.
- the lower part 110 includes a part main body 110a in which an insulating material is molded into a ring shape.
- a cylindrical tube portion 111 extending in the axial direction of the component main body 110a is provided at the approximate center of the component main body 110a.
- the outer diameter of the cylindrical portion 111 is set to be substantially the same as the inner diameter of the power feeding collar holder 90 of the power feeding bus bar 51.
- the component main body 110a is provided with a housing recess 112 in which the neutral point collar 100 is held.
- the pressing plate 120 is made of an insulating material and has a circular shape. The pressing plate 120 has a shape that can be fitted into the housing recess 112 of the component main body 110a.
- the neutral point collar 100 is held by both the lower part 110 and the pressing plate 120 with the main body 100a insulated from the outside.
- the neutral point collar 100 is accommodated in the accommodating recess 112 of the component 110 with each neutral point terminal portion 101 exposed.
- the main body portion 100a of the neutral point collar 100 is accommodated in the component main body 110a and covered with the push plate 120 from the axial direction.
- Each neutral point terminal portion 101 is arranged in a state of being drawn out radially outward from the main body portion 100a.
- a neutral point terminal row Nr connecting the tips of the neutral point terminal portions 101 represents the outer diameter of the neutral point bus bar 52.
- the neutral point terminal row Nr is equal to or smaller than the outer diameter of the stator 40 of the electric motor 11A and is equal to or larger than the outer diameter of the output shaft 16 of the electric motor 11A. As shown in FIG. 6, the diameter of the neutral point terminal array Nr is equal to or larger than the outer diameter of the power supply terminal array Fr.
- the main body 100a of the neutral point collar 100 is insulated from each motor coil 41 of the electric motor 11A by the lower part 110. Further, the main body 100a of the neutral point collar 100 is insulated from the main body portions 60b, 70b, 80b of the power supply bus bar 51, the phase terminal portions 61, 71, 81, and the lead wires of the motor coils 41 by the push plate 120. Has been. As a measure against insulation, a sufficient interval between the terminals of the neutral point terminal portions 101 is ensured.
- connection module 11B is an assembly in which the power feeding collar holder 90 is assembled to the lower part 110 and the pressing plate 120.
- the power feeding color holder 90 is assembled to the lower part 110 and the pressing plate 120 by fitting the cylindrical portion 111 of the lower part 110 into the power feeding color holder 90.
- the power supply bus bar 51 and the neutral point bus bar 52 are arranged in the axial direction of the output shaft 16.
- the positions of the power supply terminal row Fr and the neutral point terminal row Nr are shifted in the radial direction of the output shaft 16.
- the positions of the power supply terminal row Fr and the neutral point terminal row Nr are also shifted in the axial direction of the output shaft 16. That is, the positions of the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are shifted in both the radial direction and the axial direction of the output shaft 16.
- each phase terminal portion 61, 71, 81 and each neutral are determined from the positional relationship between the power supply terminal row Fr and the neutral point terminal row Nr. Each arrangement with the point terminal portion 101 is adjusted.
- the power supply terminal row Fr and the neutral point terminal row Nr in the connection module 11B As shown in FIG. 10, by using two cameras C1 and C2 respectively installed in two directions, the vertical direction and the horizontal direction, first, the power supply terminal row Fr and the neutral point terminal row Nr in the connection module 11B. The positional relationship is detected in three dimensions. The positional relationship between the power supply terminal row Fr and the neutral point terminal row Nr corresponds to each arrangement of the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101.
- the camera C1 defines a predetermined first cross section U with respect to the connection module 11B. Further, the camera C1 includes the first cross-section feeding terminal row FrU of the phase terminal portions 61, 71, 81 projected on the first cross-section U and the neutral point terminal portions 101 of the first cross-section U. A point terminal array Nr is detected.
- the first cross section U is a plane perpendicular to the axis of the connection module 11B, that is, the central axis of the stator 40 or the rotor 42 of the electric motor 11A, with the electric motor unit 11 placed at a predetermined location. .
- the camera C2 defines a predetermined second cross section V with respect to the connection module 11B.
- the camera C2 includes a second cross-section power supply terminal row FrV of each phase terminal portion 61, 71, 81 projected onto the second cross-section V, and a neutral point terminal portion 101 of each neutral point terminal portion 101 projected onto the second cross-section V.
- the two cross-section neutral point terminal rows NrV are detected.
- the second cross section V is a plane perpendicular to the first cross section U, and the axis of the connection module 11B, that is, the stator 40 or the rotor 42 of the electric motor 11A, with the electric motor unit 11 placed at a predetermined location. It is a plane parallel to the central axis.
- a cross section including all the neutral point terminal portions 101 and including the neutral point terminal row Nr is the first cross section U.
- An example described below is referred to as a “first example”.
- the neutral point terminal array Nr and the first cross section feeding terminal array FrU on the first cross section U are both annular terminal arrays having different outer diameters. Do not overlap each other.
- the closest points between the neutral point terminal row Nr and the first cross section feeding terminal row FrU are the points Un1, Uf1, the points between the points Un1, Uf1
- the distance ⁇ 1 is greater than zero.
- the distance ⁇ 1 represents the minimum distance between the neutral point terminal row Nr on the first cross section U and the first cross section feeding terminal row FrU.
- the second cross-section neutral point terminal row NrV and the second cross-section feed terminal row FrV on the second cross-section V are straight lines or straight lines parallel to each other. Are lined up. Further, in this case, on the second cross section V, if the closest points between the second cross section neutral point terminal row NrV and the second cross section feed terminal row FrV are the respective points Vn1, Vf1, each point The distance ⁇ 2 between Vn1 and Vf1 is greater than zero. The distance ⁇ 2 represents the minimum distance between the second cross-section neutral point terminal row NrV on the second cross-section V and the second cross-section feed terminal row FrV.
- the power supply terminal row Fr may be inclined with respect to the neutral point terminal row Nr.
- the cross section including all the neutral point terminal portions 101 and including the neutral point terminal row Nr is the first cross section U.
- An example described below is referred to as a “second example”.
- the neutral point terminal array Nr on the first cross section U is, for example, circular, while the first cross section feeding terminal array FrU has a major axis and a minor axis. They are arranged in an ellipse or an ellipse.
- the circular terminal row of the neutral point terminal row Nr does not overlap with the elliptical terminal row of the first cross-section feeding terminal row FrU.
- the points closest to each other between the neutral point terminal row Nr and the first cross-section feeding terminal row FrU on the first cross section U are the points Un2, Uf2, the points Un2, Uf2
- the distance ⁇ 1 between is greater than zero.
- the second section neutral point terminal row NrV and the second section feeding terminal row FrV on the second section V are not parallel to each other. Further, in this case, on the second cross section V, if the closest points between the second cross section neutral point terminal row NrV and the second cross section feed terminal row FrV are the points Vn2 and Vf2, each point The distance ⁇ 2 between Vn2 and Vf2 is greater than zero.
- each phase can be obtained if the distance ⁇ 1 on the first cross section U and ⁇ 2 on the second cross section V are larger than zero. It can be determined that the terminal portions 61, 71, 81 and the neutral point terminal portions 101 are displaced in the radial direction and the axial direction of the output shaft 16. In this case, the inclination with respect to the neutral point terminal array Nr of the power supply terminal array Fr is allowed as a manufacturing tolerance.
- the neutral point terminal array Nr may be inclined with respect to the power supply terminal array Fr.
- the cross section including all the neutral point terminal portions 101 and including the neutral point terminal row Nr becomes the first cross section U1 inclined with respect to the first cross section U.
- An example described below is referred to as a “third example”.
- the neutral point terminal row Nr and the first cross section feeding terminal row FrU on the first cross section U1 are all ellipses having different outer diameters and do not overlap each other. .
- the points closest to each other between the neutral point terminal row Nr and the first cross-section feeding terminal row FrU on the first cross section U1 are the points Un3, Uf3, the points Un3, Uf3
- the distance ⁇ 1 between is greater than zero.
- the second cross section neutral point terminal row NrV when viewed from the second cross section V, on the second cross section V, the second cross section neutral point terminal row NrV is elliptical, and the second cross section feed terminal row FrV is linear. Are lined up.
- the closest points between the second cross section neutral point terminal row NrV and the second cross section feed terminal row FrV are the points Vn3 and Vf3, each point The distance ⁇ 2 between Vn3 and Vf3 is greater than zero.
- each phase is provided if the distance ⁇ 1 on the first cross section U1 and ⁇ 2 on the second cross section V are larger than zero. It can be determined that the terminal portions 61, 71, 81 and the neutral point terminal portions 101 are displaced in the radial direction and the axial direction of the output shaft 16. In this case, the inclination of the neutral point terminal array Nr with respect to the power supply terminal array Fr is allowed as a manufacturing tolerance.
- the distance ⁇ 1 and the distance ⁇ 2 are not larger than 0, and the terminal rows intersect on the first cross section U (first cross section U1) or the second cross section V. Then, it can be determined that the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are not displaced in the radial direction and the axial direction of the output shaft 16. In this case, the positional relationship between the neutral point terminal array Nr and the power supply terminal array Fr is considered to exceed the allowable range for manufacturing tolerances. In order to cope with this, the arrangement of the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 is adjusted.
- the distance ⁇ 1 and the distance ⁇ 2 can be determined in principle in the same manner.
- the first cross section U is a surface that includes all the phase terminal portions 61, 71, and 81 and includes the power supply terminal row Fr. This surface may be curved.
- At least one of the camera C1 and the camera C2 may be replaced with position measurement by a 3-D stereo camera or a monocular camera that can generate an optical stereo image.
- each distance (delta) 1, (delta) 2 can be determined as mentioned above using the measurement apparatus etc. which are not shown in figure.
- each cross section can be arbitrarily set, and a necessary intersecting surface can be freely selected.
- connection module 11 ⁇ / b> B one of the phase terminal portions 61, 71, 81 of the power supply bus bar 51 and one of the neutral point terminal portions 101 of the neutral point bus bar 52 are connected to the stator. It is connected by welding or the like via a motor coil 41 wound around 40 teeth.
- the first end of the lead wire of the motor coil 41 of each corresponding phase is connected to each phase terminal portion 61, 71, 81.
- Each lead wire passes between the terminals of each neutral point terminal portion 101 of the connection module 11B, and then the lower part 110 and the push plate of the neutral point bus bar 52 insulated from the main body portion 100a of the neutral point collar 100. 120 extends.
- the lead wire passes through the neutral bus bar 52 that is insulated from the main body portions 60b, 70b, 80b of the phase feeding collars 60, 70, 80, and then connected to the phase terminal portions 61, 71. , 81 extends along the guide groove 94 in the vicinity.
- the first end of the lead wire of the corresponding U-phase motor coil 41u is connected to the U-phase terminal portion 61a.
- a neutral point terminal portion 101a is connected to the second end of the lead wire of the motor coil 41u.
- a first end of a lead wire of the corresponding V-phase motor coil 41v is connected to the V-phase terminal portion 71a.
- a neutral point terminal portion 101b is connected to the second end of the lead wire of the motor coil 41v.
- the first end of the lead wire of the corresponding W-phase motor coil 41w is connected to the W-phase terminal portion 81a.
- a neutral point terminal portion 101c is connected to the second end of the lead wire of the motor coil 41w.
- the power supply lines Invu, Invv, Invw corresponding to the respective phases of the inverter Inv are connected to the respective phase terminal portions 61a, 71a, 81a via the respective supply portions 60a, 70a, 80a.
- the neutral point terminal portions 101a, 101b, and 101c are star-connected (Y-connected) to the phase terminal portions 61a, 71a, and 81a via the motor coils 41u, 41v, and 41w, respectively.
- phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are located between the second cross-section neutral point terminal row NrV and the second cross-section feed terminal row FrV on the second cross-section V.
- the minimum distance, that is, the distance ⁇ 2 is arranged to be larger than zero. According to this arrangement, the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are not on the same circumference but at least shifted in the axial direction of the output shaft 16.
- each phase terminal part 61a, 71a, 81a and each neutral point terminal part 101 are arrange
- the electric motor unit 11 can be reduced in size, and hence the vehicle drive unit 10 can be reduced in size.
- phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are arranged on the circumference, and the neutral point terminal row Nr on the first cross section U or the first cross section U1 They are arranged such that the minimum distance between the one-section power supply terminal row FrU is larger than zero. According to this arrangement, the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are displaced in the axial direction of the output shaft 16, and the radial direction of the output shaft 16, that is, each phase terminal portion. 61, 71, 81 or each neutral point terminal portion 101 is also displaced in the radial direction of the circle formed.
- each phase terminal part 61,71,81 and each neutral point terminal part 101 becomes larger, the insulation countermeasure between the electric power feeding bus bar 51 and the neutral point bus bar 52 is effective. It can be carried out. Further, by arranging the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 on the circumference, the arrangement of the terminal portions can be easily adjusted.
- the power supply bus bar 51 and the neutral point bus bar 52 are respectively covered with a power supply color holder 90, a lower part 110, and a push plate 120, which are insulating materials.
- the power feeding color holder 90 has an opening 53 between specific adjacent terminal portions among the plurality of phase terminal portions 61, 71, 81. Therefore, a measure against insulation between the terminal portions located on both sides of the opening 53 in the power supply bus bar 51 can be realized by the power supply color holder 90.
- a bearing 18 b and a bearing holder portion 15 f that are a part of the transmission mechanism 14 are disposed in the opening 53 of the power supply bus bar 51. Thereby, the mounting property at the time of mounting the electric motor unit 11 on the vehicle drive unit 10 is improved, and the vehicle drive unit 10 can be downsized.
- connection module 11B is an assembly in which the power supply collar holder 90 is assembled to the lower part 110 and the pressing plate 120. According to this configuration, the power feeding bus bar 51 and the neutral point bus bar 52 can be made as close as possible while achieving both the insulation measures between the power feeding bus bar 51 and the neutral point bus bar 52 and the insulation measures between the plurality of terminal portions. it can. Therefore, it is possible to reduce the size of the connection module 11 ⁇ / b> B and consequently the electric motor unit 11.
- a bearing 18b and a bearing holder portion 15f, which are part of the transmission mechanism 14, are disposed in the opening 53 of the power supply bus bar 51.
- the electric motor unit 11 and the transmission mechanism 14 can be unitized as compared with a configuration without the opening 53. Accordingly, the transmission mechanism 14 having the rotation shafts such as the input shaft 17, the intermediate shaft 18, and the drive shafts 19 and 20 and the electric motor unit 11 can be unitized as much as possible. Therefore, the vehicle drive unit 10 can be reduced in size, and the minimum ground clearance can be sufficiently secured when the vehicle drive unit is mounted on the vehicle. Further, as described in the above (1) to (4), the size of the vehicle drive unit 10 can be reduced by reducing the size of the electric motor unit 11 within a range in which insulation measures can be maintained.
- the outer diameter of the power supply bus bar 51 is equal to or smaller than the outer diameter of the stator 40 of the electric motor 11A and is equal to or larger than the outer diameter of the output shaft 16. Therefore, when the connector CN is disposed with respect to the power supply bus bar 51, the connector CN can be disposed in the vicinity of the output shaft 16 of the electric motor 11A. In this case, the amount of the connector CN protruding from the outer diameter of the electric motor 11A can be reduced. Thereby, size reduction of the drive unit 10 for vehicles can be achieved.
- the electric motor unit 11 and the transmission mechanism 14 are accommodated in a common housing 15. In this case, as compared with the case where the electric motor unit 11 and the transmission mechanism 14 are housed in a plurality of housings, respectively, the electric motor unit 11 and the transmission mechanism 14 can be unitized with each other.
- the bearing holder portion 15e is inserted into the radially inner side of the connection module 11B, and the output shaft 16 and the bearing 16b are inserted therethrough. That is, a part of the electric motor unit 11 is used as a space for the bearing 16b that supports the output shaft 16 of the electric motor 11A. According to this configuration, the electric motor unit 11 and the transmission mechanism 14 can be unitized as close as possible.
- the transmission mechanism 14 and the connection module 11B are arranged so as to overlap each other in the axial direction of the output shaft 16 by a distance L4.
- the intermediate shaft end surface 18c, which is the end surface of the transmission mechanism 14, and the bus bar end surface 51a, which is the end surface of the connection module 11B are arranged apart by a distance L4.
- the electric motor unit 11 and the transmission mechanism 14 can be unitized as close as possible in the axial direction of the output shaft 16.
- the vehicle In consideration of traveling on a ground surface with a level difference, the vehicle has a sufficient minimum ground clearance. Therefore, depending on the size of the vehicle drive unit 10, it may be difficult to ensure the minimum ground clearance due to the relationship with other units of the vehicle, or the vehicle's living space or cargo space may be inevitably reduced. is there. In that respect, since the vehicle drive unit 10 of the present embodiment exhibits the effects (5) to (9), it is possible to easily ensure the minimum ground clearance. In addition, the influence of ensuring the minimum ground clearance on the vehicle's living space and luggage space can be reduced.
- connection module 11B is disposed in the vicinity of the transmission mechanism 14 of the electric motor 11A.
- the portion near the resolver 43 of the electric motor unit 11 can be made smaller than the configuration in which the connection module 11B is arranged near the resolver 43 of the electric motor 11A. If the connection module 11B is disposed in the vicinity of the resolver 43, the current flowing through the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 may adversely affect the resolver 43. For this reason, when arranging the connection module 11B in the vicinity of the resolver 43, it is necessary to ensure a certain distance between the connection module 11B and the resolver 43. As a result, the electric motor unit 11 may be increased in size.
- connection module 11B is arranged in the vicinity of the transmission mechanism 14 of the electric motor 11A, the influence of the current flowing through the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 on the resolver 43 can be suppressed. Therefore, measures for that are not necessary.
- the above embodiment may be modified as follows.
- the transmission mechanism 14 and the connection module 11 ⁇ / b> B do not have to overlap in the axial direction of the output shaft 16. Also in this case, effects similar to the above (1) to (8) and (10) to (12) are obtained.
- the inner diameter of the power supply bus bar 51 may be smaller than the outer diameter of the bearing holder portion 15e (bearing 16b) in the motor housing 15b within the range of the outer diameter of the output shaft 16 or more. In this case, the electric motor unit 11 can be further reduced in size.
- the inner diameter of the neutral point bus bar 52 may also be changed in the same manner as described above.
- the electric motor unit 11 and the transmission mechanism 14 may be accommodated in each of a plurality of housings. Also in this case, the electric motor unit 11 can be reduced in size.
- the transmission mechanism 14 may be capable of changing the reduction ratio of the rotation speed of the electric motor 11A.
- an intermediate shaft may be provided between the input shaft 17 and the intermediate shaft 18 to reduce the speed in three stages. .
- the outer diameter of the power supply bus bar 51 may be larger than the outer diameter of the stator 40. Also in this case, if the connection module 11B is arranged in the vicinity of the transmission mechanism 14 of the electric motor 11A, the vehicle drive unit 10 can be reduced in size.
- the outer diameter of the neutral point bus bar 52 may also be changed in the same manner as described above.
- connection module 11B may be a single component in which the power feeding collar holder 90, the lower component 110, and the pressing plate 120 are integrated by resin molding. In this case, the effect according to the effect (4) is achieved.
- an opening 53 may be provided in the neutral point bus bar 52.
- the transmission mechanism 14 does not interfere with the power supply bus bar 51
- the power supply bus bar 51 does not have to be provided with the opening 53. In this case, the electric motor unit 11 can be reduced in size.
- the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 only need to be shifted in the axial direction of the output shaft 16.
- the neutral point terminal array Nr may have the same diameter as the power supply terminal array Fr.
- the positions of the neutral point terminal row Nr and the feeding terminal row Fr may be interchanged.
- the outer diameter of the power supply terminal row Fr is greater than or equal to the outer diameter of the neutral point terminal row Nr.
- the plurality of phase terminal portions 61, 71, 81 and the plurality of neutral point terminal portions 101 may not be arranged on the circumference.
- the distance ⁇ 1 and the distance ⁇ 2 on the first cross section U (or the first cross section U1) and the second cross section V may be larger than zero.
- a part or all of the main body 100a facing the electric motor 11A of the neutral point collar 100 may be exposed. However, it is necessary to take insulation measures such as separating the lead wires of the motor coils 41 from the main body 100a of the neutral point collar 100.
- the order of the phases held by the power feeding color holder 90 is changed from the inside of the power feeding color holder 90 in the order of W phase, V phase, U phase, or the order of V phase, W phase, U phase is changed. May be.
- the order in which the phase terminal portions 61, 71, 81 are arranged is changed counterclockwise from the opening 53 in the order of U phase, W phase, V phase, or in the order of V phase, W phase, U phase. May be.
- Each phase terminal portion 61, 71, 81 is disposed between the output shaft 16 (input shaft 17) and the intermediate shaft 18 and between the output shaft 16 (input shaft 17) and the connector CN. That's fine.
- the power supply terminals for all phases of the phase terminal portions 61, 71, 81 are arranged between the output shaft 16 (input shaft 17) and the intermediate shaft 18 and between the output shaft 16 (input shaft 17) and the connector CN. However, it is only necessary to target at least one phase power supply terminal among the phase terminal portions 61, 71, 81.
- the diameters of the terminal circles connecting the tips of the phase terminal portions 61, 71, 81 may be different, and the phase terminal portions 61, 71, 81 and the neutral point terminal portions 101 are connected to the output shaft 16. You may arrange
- connection of each motor coil 41 is a connection which requires a neutral point, it may be a star delta connection other than a star connection, for example.
- the output shaft 16 of the electric motor 11A may be arranged perpendicular to the drive shafts 19 and 20 of the transmission mechanism 14.
- the electric motor 11A may be an outer rotor type motor instead of an inner rotor type.
- the electric motor unit 11 may be mounted on another unit such as a unit for controlling the steering of the vehicle. Also in this case, the unit can be reduced in size. Moreover, you may mount the electric motor unit 11 in a generator or household electric equipment other than a vehicle.
- the vehicle drive unit 10 is a vehicle that obtains the driving force of the front wheel drive from the rotational torque generated by the electric motor 11A of the electric motor unit 11, or the vehicle that obtains the drive force of any of the front and rear wheels from the rotational torque generated by the electric motor 11A. May be installed.
- the vehicle drive system may be a front-wheel drive or rear-wheel drive system.
- SYMBOLS 10 ... Drive unit for vehicles, 11 ... Electric motor unit, 11A ... Electric motor, 11B ... Connection module, 12, 13 ... Drive wheel, 14 ... Transmission mechanism, 15 ... Housing, 15e, 15f ... Bearing holder part, 16 ... Output Shaft, 16a, 16b ... bearing, 17 ... input shaft, 18 ... intermediate shaft, 18a, 18b ... bearing, 18c ... intermediate shaft end face, 19, 20 ... drive shaft, 21, 22, 23 ... gear, 24 ... differential gear, 40 ... Stator, 41 ... Motor coil, 42 ... Rotor, 51 ... Power supply bus bar, 51a ... Bus bar end face, 52 ... Neutral point bus bar, 53 ... Opening, 60 ...
- U-phase power supply collar 60d ... Joint part, 61 ... U Phase terminal part, 70 ... V-phase feeding collar, 70d ... Mouth part, 71 ... V-phase terminal part, 80 ... W-phase feeding collar, 80d ... Mouth part, 81 ... W-phase terminal part DESCRIPTION OF SYMBOLS 90 ... Power feeding color holder, 100 ... Neutral point collar, 101 ... Neutral point terminal part, 110 ... Lower part, 120 ... Push plate, Inv ... Inverter, Fr ... Feeding terminal row, Nr ... Neutral point terminal row, U , U1... First section, V... Second section, ⁇ 1, ⁇ 2. Distance (minimum distance).
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
上記構成によれば、開口部に伝達機構の一部を配置できるため、開口部の無い場合と比較して、電動モータユニットと伝達機構とを接近させた状態でユニット化することができる。また、絶縁対策を維持できる範囲で電動モータユニットを小さくすることで、車両用駆動ユニットの小型化を図ることができる。また、車両用駆動ユニットの車両搭載時、地表面から車両の最も低い箇所までの垂直距離である最低地上高を十分に確保することもできる。
上記構成によれば、電動モータユニットと伝達機構とが複数のハウジングにそれぞれ収容されている場合と比較して、電動モータユニットと伝達機構とを更に接近させた状態でユニット化することができる。
上記構成によれば、電動モータユニットと伝達機構とを電動モータの出力軸の軸方向に極力接近させた状態でユニット化することができる。
図1に示すように、車両用駆動ユニット10は、例えば、電動モータユニット11の電動モータ11Aが発生する回転トルクから後輪の駆動力を得る前後輪駆動の車両に搭載されている。車両用駆動ユニット10は、後輪である駆動輪12,13の間に配置されている。車両用駆動ユニット10は、車両後部の地面に面する下側に、最低地上高を十分に確保した状態で配置されている。
図1及び図2に示すように、伝達機構14は、電動モータ11Aが発生する回転トルクを伝達機構14に入力する回転軸としての入力軸17を備えている。電動モータ11Aは、回転トルクを出力する出力軸16を備えている。入力軸17は、出力軸16の伝達機構14近傍の端部16dに、機械的に連結されている。入力軸17は、ギヤハウジング15aに固定される軸受17aと、モータハウジング15bに固定される軸受17bとにより回転自在に支持されている。モータハウジング15bは、出力軸16周りに軸受ホルダ部15eを有している。軸受17bは、軸受ホルダ部15eの伝達機構14近傍に固定されている。入力軸17には、入力歯車21が、入力軸17と一体回転可能に固定されている。
図1に示すように、ハウジング開口部15c近傍には、複数のティースが形成された円筒状のステータ40が固定されている。各ティースには、インシュレータを介して複数のモータコイル41がそれぞれ巻回されている。各モータコイル41の引き出し線の第1端は、U相、V相、W相の3相のうち対応する相の後述する相端子部61,71,81に対して、それぞれ結線されている。各モータコイル41の引き出し線の第2端は、後述する各中性点端子部101に対して、それぞれ結線されている。各モータコイル41は、スター結線(Y結線)されている。
図1に示すように、結線モジュール11Bは、給電体としての円筒状の給電バスバー51と、中性点体としての円板状の中性点バスバー52とを有している。給電バスバー51は、コネクタCN(後述の各供給部60a,70a,80a)を介して、各モータコイル41の第1端と、電動モータ11Aの駆動電力の供給源であるインバータInvとを結線する。インバータInvには、インバータInvの動作を制御するための制御回路が接続されている。中性点バスバー52は、各モータコイル41の第1端と反対側の端部である第2端を、互いに結線する。コネクタCNは、モータハウジング15bから外側に突出している。コネクタCNは、電動モータ11Aにおいて伝達機構14近傍に設けられている。
まず、図5及び図6を参照して、給電バスバー51の構成について説明する。給電バスバー51は、銅板等の金属板からなるU相給電カラー60、V相給電カラー70、及びW相給電カラー80を含む。給電バスバー51は、樹脂材料等の絶縁材料からなるインシュレータとしての給電カラーホルダ90に保持されている。各相給電カラー60,70,80は、各相の相端子部61,71,81に結線されるモータコイル41の引き出し線の第1端とコネクタCNとを電気的に接続するための配電部材である。各相給電カラー60,70,80から、板状の供給部60a,70a,80aが、コネクタCNに向けてそれぞれ延びている。各供給部60a,70a,80aは、インバータInvから各相に対応する電力を供給する。
第1例の場合、第1断面Uから見た場合、第1断面U上の中性点端子列Nr及び第1断面給電端子列FrUはいずれも、外径の異なる環状の端子列であり、互いに重ならない。また、第1断面U上において、中性点端子列Nrと第1断面給電端子列FrUとの間で最も近接する各点を各点Un1,Uf1とすれば、各点Un1,Uf1の間の距離δ1は、0よりも大きい。距離δ1は、第1断面U上の中性点端子列Nrと第1断面給電端子列FrUとの間の最小距離を表している。
2台のカメラC1,C2を用いて、結線モジュール11Bにおける給電端子列Frと中性点端子列Nrとの位置関係を3次元で検出する場合、給電端子列Frと中性点端子列Nrとの関係を入れ替えても、第1例~第4例はいずれも成立する。この場合、例えば、第1断面U(又は第1断面U1)は、各相端子部61,71,81の全てを含み給電端子列Frを含む面となる。この面は、湾曲していてもよい。尚、カメラC1又はカメラC2の少なくとも一つは、光学的なステレオ画像を生成できる3-Dステレオカメラや単眼カメラによる位置計測に置き換えてもよい。これにより、各端子の3次元位置を直接取得できるので、各距離δ1,δ2を、図示しない計測機器等を用いて、上記の如く判定することができる。この場合、各断面は任意に設定でき、必要な交差する面を自由に選ぶことができる。
(1)各相端子部61,71,81と各中性点端子部101とは、第2断面V上の第2断面中性点端子列NrVと第2断面給電端子列FrVとの間の最小距離、即ち、距離δ2が0よりも大きくなるように配置されている。この配置によれば、各相端子部61,71,81と各中性点端子部101とは、同一円周上ではなく、少なくとも出力軸16の軸方向にずれている。この場合、各相端子部61a,71a,81aと各中性点端子部101とを同一円周上に配置した場合と比較して、給電バスバー51及び中性点バスバー52のそれぞれにおいて、隣り合う端子部間の距離を大きくすることができる。これにより、絶縁対策を維持できる範囲内で給電バスバー51及び中性点バスバー52の隣り合う端子部を接近させることができる。このため、電動モータユニット11の小型化、ひいては、車両用駆動ユニット10の小型化を図ることができる。
・伝達機構14と結線モジュール11Bとが出力軸16の軸方向に重なっていなくてもよい。この場合も、上記(1)~(8)、(10)~(12)に準じた効果を奏する。
・伝達機構14は、電動モータ11Aの回転速度の減速比を変更可能であってもよく、例えば、3段階で減速させるため、入力軸17及び中間軸18の間に中間軸を備えてもよい。
・各相端子部61,71,81が並ぶ順番を、開口部53から反時計周りにU相、W相、V相の順に変更したり、V相、W相、U相の順に変更したりしてもよい。
・各相端子部61,71,81の全相の給電端子は、出力軸16(入力軸17)と中間軸18との間及び出力軸16(入力軸17)とコネクタCNとの間に配置されていたが、各相端子部61,71,81のうち少なくとも1相の給電端子を対象とすればよい。この場合、各相端子部61,71,81の先端を結ぶ各端子円の径を異ならせてもよく、各相端子部61,71,81及び各中性点端子部101を出力軸16の径方向及び軸方向にずらして配置してもよい。
・伝達機構14のドライブシャフト19,20に対して、電動モータ11Aの出力軸16を垂直に配置してもよい。
・電動モータユニット11を、例えば、車両の操舵を制御するためのユニット等、他のユニットに搭載してもよい。この場合も、ユニットの小型化を図ることができる。また、電動モータユニット11を、車両以外に、発電機や家庭用電気機器に搭載してもよい。
Claims (10)
- 電力を供給する複数のモータコイル、前記複数のモータコイルがそれぞれ巻回される円筒状のステータ、及び前記ステータと同軸上に設けられたロータを有する電動モータと、前記電力の供給源と前記複数のモータコイルとを結線する給電体、及び前記複数のモータコイルを互いに結線する中性点体を有する結線モジュールとを備えた電動モータユニットにおいて、
前記給電体は、複数の端子部が配列されている給電用配電部材を有し、
前記中性点体は、複数の端子部が配列されている中性点用配電部材を有し、
前記給電体又は前記中性点体の複数の端子部の全てを含む面を第1断面と定義し、
前記第1断面と交差する面を第2断面方向と定義し、
前記第2断面から見た場合、前記給電体の複数の端子部の配列と前記中性点体の複数の端子部の配列とが最も近接する箇所の両配列間の距離が、零よりも大きいことを特徴とする電動モータユニット。 - 請求項1に記載の電動モータユニットにおいて、
前記給電体及び前記中性点体の複数の端子部は、環状に並べられ、
前記第1断面から見た場合、前記給電体の複数の端子部の配列と前記中性点体の複数の端子部の配列とが最も近接する箇所の両配列間の距離が、零よりも大きいことを特徴とする電動モータユニット。 - 請求項1又は2に記載の電動モータユニットにおいて、
前記給電体及び前記中性点体は、前記複数の端子部を露出させた状態で絶縁部材によりそれぞれ覆われ、
前記給電体及び前記中性点体のいずれか一方を覆う絶縁部材には、前記複数の端子部のうち特定の隣り合う端子部間に開口部が設けられていることを特徴とする電動モータユニット。 - 請求項3に記載の電動モータユニットにおいて、
前記結線モジュールは、前記給電体を覆う絶縁部材と前記中性点体を覆う絶縁部材とを組み付けて得られる組付体、又は前記給電体を覆う絶縁部材と前記中性点体を覆う絶縁部材とを一体化した一部品であることを特徴とする電動モータユニット。 - 車両用駆動ユニットであって、
請求項3又は4に記載の電動モータユニットと、
前記電動モータの回転速度を複数の歯車を介して減速することにより得られた回転トルクを車両の駆動輪に駆動軸を介して伝達する伝達機構とを備え、
前記結線モジュールは、前記電動モータの前記伝達機構近傍に配置され、
前記給電体及び前記中性点体のいずれか一方を覆う絶縁部材の開口部には、前記伝達機構の一部が配置されていることを特徴とする車両用駆動ユニット。 - 請求項5に記載の車両用駆動ユニットにおいて、
前記電動モータは、前記供給源からコネクタを介して前記給電体に供給される電力により駆動することで、前記ロータに挿入された出力軸を回転させることにより回転トルクを発生し、
前記給電体の外径は、前記ステータの外径以下であり、
前記給電体の内径は、前記出力軸の外径以上であることを特徴とする車両用駆動ユニット。 - 請求項5又は6に記載の車両用駆動ユニットにおいて、
前記伝達機構は、前記複数の歯車の回転軸となる複数の回転軸を有し、
前記複数の回転軸は、
前記ロータに挿入された出力軸に連結される入力軸と、
前記入力軸に対して平行に配置される中間軸と、
前記中間軸に対して平行に配置される駆動軸とを含み、
前記入力軸、前記中間軸、前記駆動軸の各軸中心は、同一平面上に並べられていることを特徴とする車両用駆動ユニット。 - 請求項5~7のうちいずれか一項に記載の車両用駆動ユニットにおいて、
前記電動モータユニットと前記伝達機構とは、共通のハウジングに収容されていることを特徴とする車両用駆動ユニット。 - 請求項5~8のうちいずれか一項に記載の車両用駆動ユニットにおいて、
前記給電体の径方向内側には、前記ロータに挿入された出力軸を回転自在に支持する軸受が設けられ、
前記給電体の内径は、前記軸受の外径以上であることを特徴とする車両用駆動ユニット。 - 請求項5~9のうちいずれか一項に記載の車両用駆動ユニットにおいて、
前記給電体と前記伝達機構とは、前記ロータに挿入された出力軸の軸方向に重なるように配置されていることを特徴とする車両用駆動ユニット。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020532945A (ja) * | 2017-09-06 | 2020-11-12 | エルジー イノテック カンパニー リミテッド | モータ |
JP2021005998A (ja) * | 2019-06-26 | 2021-01-14 | アティエヴァ、インコーポレイテッド | モータ巻線コネクタリング |
CN113597730A (zh) * | 2019-04-04 | 2021-11-02 | 汉拿电驱动股份有限公司 | 电机以及用于机动车辆的驱动装置 |
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WO2017058664A1 (en) * | 2015-09-29 | 2017-04-06 | Faraday & Future Inc. | Integrated drive and motor assemblies |
JP6933775B2 (ja) * | 2018-04-26 | 2021-09-08 | 本田技研工業株式会社 | 車両用パワーユニット |
JP2020089205A (ja) * | 2018-11-30 | 2020-06-04 | トヨタ自動車株式会社 | 回転軸の支持構造 |
FR3093387A1 (fr) * | 2019-02-28 | 2020-09-04 | Nidec Psa Emotors | Dispositif de connexion pour stator |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007221962A (ja) * | 2006-02-20 | 2007-08-30 | Aisin Seiki Co Ltd | 車両用駆動装置 |
JP2008219994A (ja) * | 2007-03-01 | 2008-09-18 | Nippon Densan Corp | モータ |
JP2012143019A (ja) * | 2010-12-28 | 2012-07-26 | Toyota Motor Corp | 回転電機のバスバーモジュールおよびその製造方法 |
JP2014187797A (ja) * | 2013-03-22 | 2014-10-02 | Mitsuba Corp | 結線部材、ステータ、電動モータ、及びステータの製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11103551A (ja) * | 1997-09-29 | 1999-04-13 | Sawafuji Electric Co Ltd | アウタロータ型多極発電機におけるコイル接続構造 |
JP2006219994A (ja) | 2005-02-08 | 2006-08-24 | Suzuki Motor Corp | 船外機の燃料供給装置 |
JP2010241178A (ja) | 2009-04-01 | 2010-10-28 | Gkn Driveline Japan Ltd | 動力伝達装置 |
JP5740930B2 (ja) * | 2010-03-03 | 2015-07-01 | 日本電産株式会社 | ステータ及びモータ |
JP5703604B2 (ja) | 2010-03-03 | 2015-04-22 | 日本電産株式会社 | バスバーユニット及びモータ |
CN103947083B (zh) * | 2011-11-22 | 2016-08-31 | 本田技研工业株式会社 | 旋转电机 |
US20140028127A1 (en) * | 2012-07-25 | 2014-01-30 | Bradley Duane Chamberlin | Buss bar assembly having alignment and retention feature |
JP2016059130A (ja) * | 2014-09-08 | 2016-04-21 | 本田技研工業株式会社 | 回転電機のステータ |
-
2016
- 2016-01-18 DE DE112016000451.6T patent/DE112016000451T5/de not_active Withdrawn
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007221962A (ja) * | 2006-02-20 | 2007-08-30 | Aisin Seiki Co Ltd | 車両用駆動装置 |
JP2008219994A (ja) * | 2007-03-01 | 2008-09-18 | Nippon Densan Corp | モータ |
JP2012143019A (ja) * | 2010-12-28 | 2012-07-26 | Toyota Motor Corp | 回転電機のバスバーモジュールおよびその製造方法 |
JP2014187797A (ja) * | 2013-03-22 | 2014-10-02 | Mitsuba Corp | 結線部材、ステータ、電動モータ、及びステータの製造方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020532945A (ja) * | 2017-09-06 | 2020-11-12 | エルジー イノテック カンパニー リミテッド | モータ |
CN113597730A (zh) * | 2019-04-04 | 2021-11-02 | 汉拿电驱动股份有限公司 | 电机以及用于机动车辆的驱动装置 |
JP2021005998A (ja) * | 2019-06-26 | 2021-01-14 | アティエヴァ、インコーポレイテッド | モータ巻線コネクタリング |
US11133719B2 (en) | 2019-06-26 | 2021-09-28 | Atieva, Inc. | Motor winding connector ring |
JP7041999B2 (ja) | 2019-06-26 | 2022-03-25 | アティエヴァ、インコーポレイテッド | モータ巻線コネクタリング |
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