WO2022181028A1 - Dyanamo-electric machine and power unit - Google Patents

Dyanamo-electric machine and power unit Download PDF

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Publication number
WO2022181028A1
WO2022181028A1 PCT/JP2021/047934 JP2021047934W WO2022181028A1 WO 2022181028 A1 WO2022181028 A1 WO 2022181028A1 JP 2021047934 W JP2021047934 W JP 2021047934W WO 2022181028 A1 WO2022181028 A1 WO 2022181028A1
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WO
WIPO (PCT)
Prior art keywords
rotor
injection hole
electric machine
axis
stator
Prior art date
Application number
PCT/JP2021/047934
Other languages
French (fr)
Japanese (ja)
Inventor
豊 薗田
祐太 柳田
大介 北村
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Publication of WO2022181028A1 publication Critical patent/WO2022181028A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the present invention relates to rotating electric machines and power units.
  • the present invention claims priority based on Japanese Patent Application No. 2021-028326 filed in Japan on February 25, 2021, the content of which is incorporated herein.
  • Patent Document 1 a structure for cooling a coil provided in a stator is known (see Patent Document 1, for example).
  • the generator of Patent Document 1 includes a bottomed cylindrical rotor fixed to a crankshaft of an internal combustion engine, a stator arranged with a core opposed to a permanent magnet arranged on the inner circumference of the cylindrical portion of the rotor, and a stator. and a cover for holding.
  • the cover is provided with jets for injecting oil toward the bottom surface of the rotor.
  • the stator core is provided with holes through which the oil injected from the jet can pass. Rivet heads protrude from the bottom surface of the rotor. The oil injected from the jet bounces off the head of the rivet and is stirred and scattered. Since the oil injected from the jet collides with the inner peripheral side of the coil, the centrifugal force caused by the rotation of the rotor scatters the oil in the outer peripheral direction and bounces back toward the coil.
  • an object of the present invention is to cool the magnet of the rotor, which is a heat generating member.
  • a rotary electric machine includes a cylindrical rotor body (41) and magnets (42) provided on either one of the inner circumference and the outer circumference of the rotor body (41). and a rotor (40) rotatable about the axis (AL) of the rotor body (41); and a coil (52) wound around the stator body (51); and the stator (50) is axially outward along the axis (AL) and a cover (60) covering the magnet (42), the cover (60) having a first injection hole (71) for injecting fluid toward the magnet (42).
  • the rotating electrical machine (39) is of the outer rotor type, and the rotor body (41) is a cylindrical portion centered on the axis (AL). (43) and a bottom (44) continuous with said cylindrical portion (43) and fixed to a shaft (12) having said axis (AL), said magnet (42) being connected to said cylindrical portion (43), the stator body (51) is provided radially inward of the cylindrical portion (43), and the cover (60) is different from the first injection hole (71).
  • the first injection hole (71) may be arranged radially outside the second injection hole (72).
  • the axis (AL) is arranged horizontally, and the first injection holes (71) are arranged along the axis ( AL) may be arranged vertically above.
  • the axis (AL) is arranged horizontally, and when viewed from the axial direction, the axis (AL)
  • the first injection hole (71) is , when viewed from the axial direction, the rotor (40) is arranged in the left area (T1) when the rotor (40) rotates to the left, and is arranged in the right area (T2) when the rotor (40) rotates to the right.
  • the rotating electric machine (39) is of an outer rotor type, and the magnet (42) is arranged in the rotor main body (41).
  • the stator body (51) is provided radially inward of the rotor body (41), and the first injection holes (71) are radially outward of the rotor body (41). may be directed to
  • the magnet (42) is arranged on an extension line of the first injection hole (71), and the coil (52) is arranged on the first injection hole (71). ) may be arranged avoiding the extension line of
  • a power unit includes the rotating electrical machine (39) according to any one of (1) to (7) above.
  • the rotating electric machine (39) may be capable of starting the internal combustion engine (11).
  • the rotor body has a cylindrical rotor body, and the magnets are provided on either one of the inner circumference and the outer circumference of the rotor body, and the axis line of the rotor body a stator having a rotor rotatable about a center, a stator body provided on either one of a radially inner side and a radially outer side with respect to the rotor body, and a coil wound around the stator body; and a cover that covers the stator from the outside in the axial direction along the .
  • the cover has the first injection hole that injects the fluid toward the magnet, thereby providing the following effects. Since the first injection hole injects the fluid toward the magnet of the rotor, the magnet of the rotor, which is a heat generating member, can be cooled.
  • the rotating electrical machine is of the outer rotor type, and the rotor body includes a cylindrical portion centered on the axis, a cylindrical portion continuous with the cylindrical portion, and an axis a bottom portion fixed to a shaft having a magnet provided on the inner periphery of the cylindrical portion; a stator body provided radially inward of the cylindrical portion; and a cover separately from the first injection hole , the second injection hole for injecting the fluid toward at least one of the coil and the bottom provides the following effects.
  • the coils of the stator can be cooled directly or by rebounding from the bottom. Therefore, the magnet of the rotor and the coil of the stator, which are heat generating members, can be cooled. For example, when a generator is applied to a large vehicle such as a large motorcycle, it is necessary to increase the size of the generator and use a large amount of electric power. .
  • the first injection hole is arranged radially outward of the second injection hole, thereby providing the following effects.
  • the magnets are arranged radially outside the coils, so the first injection holes and the second injection holes can be preferably arranged. Therefore, both the magnet of the rotor and the coil of the stator can be effectively cooled compared to the case where the first injection holes are arranged radially inward of the second injection holes in the outer rotor type electric rotating machine. can be done.
  • the axis is arranged horizontally, and the first injection hole is arranged vertically above the axis, so that the following effects are achieved.
  • the portion vertically below the axis has little need for cooling.
  • the portion vertically above the axis tends to retain heat, and requires cooling.
  • the first injection hole can intensively cool the portion vertically above the axis, so that more effective cooling can be performed.
  • the axis is arranged horizontally, and the left side bisected by the vertical line passing through the axis is defined as the left area when viewed from the axial direction, and the vertical line
  • the first injection hole is arranged in the left side region when the rotor rotates to the left, and is arranged in the right side region when the rotor rotates to the right, as viewed from the axial direction.
  • the cooling effect of the fluid due to the rotation of the rotor is more difficult to obtain in the downstream side of the rotor in the rotational direction than the upstream side of the rotor in the rotational direction of the vertical line passing through the axis.
  • the first injection hole can intensively cool the portion on the downstream side in the rotation direction of the rotor with respect to the vertical line passing through the axis, more effective cooling can be performed.
  • the rotating electrical machine is of the outer rotor type
  • the magnet is provided on the inner circumference of the rotor body
  • the stator body is arranged radially inward of the rotor body.
  • the magnet is arranged on the extension line of the first injection hole, and the coil is arranged to avoid the extension line of the first injection hole, It has the following effects. Compared to the case where the coil is arranged on the extension line of the first injection hole, the fluid injected from the first injection hole tends to avoid the coil and hit the magnet directly, so the rotor magnet is effectively cooled. can do.
  • the power unit described in (8) above of the present invention by including the rotating electric machine described above, the following effects can be obtained. It is possible to provide a power unit that can cool the magnet of the rotor, which is a heat generating member.
  • the rotating electric machine can start the internal combustion engine, thereby providing the following effects.
  • the magnet of the rotor can be cooled.
  • FIG. 1 is a right side view of the motorcycle of the embodiment;
  • FIG. FIG. 2 is a front view including a II-II section of FIG. 1;
  • FIG. 3 is an explanatory diagram of the arrangement of injection holes as viewed from arrow III in FIG. 2 ;
  • a motorcycle is taken as an example of a straddle-type vehicle to which a rotating electric machine is applied.
  • the motorcycle may be simply referred to as a "vehicle".
  • directions such as front, rear, left, and right in the following description are the same as directions in the vehicle described below unless otherwise specified.
  • An arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, and an arrow UP indicating the upper side of the vehicle are shown at appropriate locations in the drawings used in the following description.
  • a motorcycle 1 (straddle-type vehicle) includes front wheels 3 steered by a handlebar 2, rear wheels 4 driven by a power unit 10 including a power source, and a vehicle body supporting the power unit 10. a frame 20;
  • the vehicle body frame 20 includes a head pipe 21 supporting the steering wheel 2 so as to be steerable, a pair of left and right main frames 22 extending rearward and downward from the head pipe 21 , and extending rearward and downward from the head pipe 21 steeper than the main frames 22 .
  • a down frame 23 a pair of left and right pivot plates 25 extending downward from the rear end portion of the main frame 22, a pair of left and right seat rails 26 extending rearward from the rear portion of the main frame 22, and a rear upper portion of the pivot plate 25.
  • a pair of left and right rear frames 27 extending and connected to rear end portions of the seat rails 26 are provided.
  • the axle 4a of the rear wheel 4 is pivotally supported by the rear end of the swing arm 5 extending in the front-rear direction.
  • a front end portion of the swing arm 5 is supported by a pivot plate 25 via a pivot shaft 25a so as to be vertically swingable.
  • a fuel tank 7 is supported by the left and right main frames 22 .
  • a seat 8 supported by left and right seat rails 26 is provided behind the fuel tank 7 .
  • the power unit 10 is connected to an engine 11 that is an internal combustion engine that burns a combustible air-fuel mixture to obtain output, an ACG starter motor 39 (rotating electric machine) that functions as a starter and a generator, and a crankshaft 12 (shaft). and a transmission (power transmission mechanism) (not shown) that transmits power from the engine 11 to the rear wheels 4 that are drive wheels.
  • an engine 11 that is an internal combustion engine that burns a combustible air-fuel mixture to obtain output
  • an ACG starter motor 39 rotating electric machine
  • crankshaft 12 shaft
  • a transmission power transmission mechanism
  • the engine 11 is fixedly supported by the body frame 20 .
  • the engine 11 is a single-cylinder engine having a crankshaft 12 along the vehicle width direction.
  • the engine 11 includes a crankcase 13 that rotatably supports and accommodates the crankshaft 12, and a cylinder 14 that rises slightly forward from the front upper portion of the crankcase 13 and stands upward.
  • the crankcase 13 constitutes the lower portion of the engine 11 .
  • a front end portion of the crankcase 13 is supported by a hanger bracket 15 .
  • a rear end portion of the crankcase 13 is supported by a lower end portion of the main frame 22 .
  • An exhaust pipe 16 is connected to the lower part of the cylinder 14 (exhaust port of the cylinder head).
  • the exhaust pipe 16 bends and extends rearward below the cylinder 14 , and then bends and extends rearwardly upward and outwardly in the vehicle width direction at a position below the cover 60 of the ACG starter motor 39 .
  • a rear end portion of the exhaust pipe 16 is connected to a front end portion of a muffler 17 (silencer) disposed on the right side of the rear wheel 4 .
  • the ACG starter motor 39 functions as a starter capable of starting the engine 11 and also functions as a generator.
  • a battery (not shown) is connected to the ACG starter motor 39 .
  • the battery powers the ACG starter motor 39 when the ACG starter motor 39 functions as a starter.
  • the battery is charged with regenerated electric power of the ACG starter motor 39 when the ACG starter motor 39 functions as a generator.
  • the engine 11 and the ACG starter motor 39 are controlled by a control unit (not shown).
  • the ACG starter motor 39 is an outer rotor type motor.
  • the ACG starter motor 39 has a rotor 40 , a stator 50 and a cover 60 .
  • the rotor 40 is formed in a cup shape (cylindrical shape with a bottom).
  • the rotor 40 surrounds the stator 50 .
  • Rotor 40 is spaced from stator 50 .
  • the rotor 40 is fixed to the crankshaft 12 (indicated by a two-dot chain line in FIG. 2).
  • the rotor 40 includes a tubular rotor body 41 and magnets 42 provided on the inner circumference of the rotor body 41 .
  • the rotor 40 is rotatable around the axis AL of the rotor body 41 .
  • the rotor body 41 includes a cylindrical portion 43 centered on the axis AL and a bottom portion 44 continuous with the cylindrical portion 43 .
  • the cylindrical portion 43 is arranged radially outside the stator 50 .
  • the cylindrical portion 43 has a magnet attachment recess 45 to which the magnet 42 can be attached.
  • the magnet mounting recess 45 is recessed radially outward from the inner peripheral surface of the cylindrical portion 43 .
  • the magnet mounting recess 45 has substantially the same cross-sectional shape as the magnet 42 .
  • the bottom portion 44 extends radially inward from the axial inner end of the cylindrical portion 43 along the axis AL.
  • a boss portion (central portion in the radial direction) of the bottom portion 44 is fixed to a taper portion (right end portion) of the crankshaft 12 having the axis AL.
  • the magnet 42 is a permanent magnet.
  • the magnet 42 is provided on the inner circumference of the cylindrical portion 43 .
  • the magnet 42 is attached to the magnet attachment recess 45 .
  • the inner peripheral surface of the rotor 40 is formed so as to be continuous (flush) in the axial direction when the magnets 42 are attached to the magnet attachment recesses 45 .
  • the stator 50 includes a stator body 51 provided radially inside the rotor body 41 and a coil 52 wound around the stator body 51 .
  • the stator main body 51 is a core in which a plurality of iron plates with insulated surfaces are laminated.
  • the stator main body 51 is provided radially inward of the cylindrical portion 43 .
  • the coil 52 is wound around the stator body 51 via insulating plates 53 superimposed on both axial side surfaces of the stator body 51 .
  • the coil 52 is pulled out by a harness (not shown) and connected to the control unit.
  • the cover 60 covers the rotor 40 and the stator 50 from the outside in the axial direction along the axis AL.
  • the cover 60 is connected to the right side portion of the crankcase 13 in the vehicle width direction.
  • the cover 60 functions as a generator room cover that holds the stator 50 .
  • the outer peripheral portion of the cover 60 is provided with a plurality of connecting portions 66 having bolt holes through which bolts (not shown) are inserted for connecting the cover 60 to the crankcase 13 (see FIG. 2). is provided.
  • the plurality of connecting portions 66 are arranged at intervals in the circumferential direction.
  • the rotor 40 and the stator 50 are accommodated in the internal space 59 (hereinafter referred to as "generator chamber 59") of the cover 60.
  • the cover 60 includes a base portion 61 that supports the stator 50 , an outer cylindrical portion 62 that is provided radially outwardly of the rotor 40 , and a side wall portion 63 that is provided axially outwardly of the stator 50 .
  • the base portion 61, the outer cylinder portion 62, and the side wall portion 63 are integrally formed of the same member.
  • the base 61 is formed in a cylindrical shape coaxial with the axis AL.
  • the base 61 has a stator mounting recess 64 to which the stator main body 51 can be mounted.
  • the stator mounting recess 64 is recessed axially outward from the axially inner end surface of the base portion 61 on the outer peripheral side.
  • the inner peripheral portion of the stator body 51 has a through hole 54 through which a bolt 65 for connecting the stator body 51 to the base portion 61 is inserted.
  • the through hole 54 is provided at a position overlapping the stator mounting recess 64 when viewed in the axial direction.
  • the bolt 65 is inserted axially inwardly through the through hole 54 and the stator mounting recess 64 , and the male threaded portion of the bolt 65 is screwed into the female threaded portion of the stator mounting recess 64 .
  • the stator main body 51 can be fastened to the base portion 61 via the bolts 65 .
  • the outer cylindrical portion 62 is formed in a cylindrical shape that is larger than the base portion 61 .
  • the outer cylindrical portion 62 gradually expands in diameter toward the inner side in the axial direction.
  • a plurality of connecting portions 66 are provided at the axially inner end portion of the outer cylindrical portion 62 .
  • An axially inner end portion of the outer cylindrical portion 62 is fastened to the crankcase 13 with a plurality of bolts (not shown) via a plurality of connecting portions 66 .
  • the side wall portion 63 is formed in an annular shape coaxial with the axis AL.
  • the side wall portion 63 connects the axially outer end portion of the base portion 61 and the axially outer end portion of the outer cylinder portion 62 .
  • the side wall portion 63 has a first injection hole 71 for injecting oil (fluid) toward the magnet 42 and a second injection hole 72 for injecting oil toward at least one of the coil 52 and the bottom portion 44 .
  • the first injection hole 71 and the second injection hole 72 are arranged at different positions.
  • the first injection hole 71 and the second injection hole 72 have the same hole diameter. Note that the first injection hole 71 and the second injection hole 72 may have hole diameters different from each other.
  • each injection hole As shown in FIG. 3, a plurality of (for example, three in this embodiment) first injection holes 71 are provided. The plurality of first injection holes 71 are arranged at intervals in the circumferential direction. The second injection hole 72 is provided separately from the first injection hole 71 . A plurality of second injection holes 72 (for example, nine in this embodiment) are provided. The plurality of second injection holes 72 are arranged at intervals in the circumferential direction.
  • the first injection hole 71 is arranged radially outside the second injection hole 72 .
  • the first injection hole 71 is arranged between two second injection holes 72 adjacent in the circumferential direction.
  • the axis AL is the central axis of the crankshaft 12 (see FIG. 2) along the vehicle width direction.
  • Axis AL is arranged horizontally when the vehicle is upright (for example, before the vehicle is banked).
  • FIG. 3 shows a state in which the axis AL is arranged horizontally.
  • the first injection hole 71 is arranged vertically above the axis AL.
  • a horizontal line HL passing through the axis AL is set.
  • the first injection holes 71 are arranged only vertically above the horizontal line HL. That is, the first injection holes 71 are not arranged vertically below the horizontal line HL.
  • a vertical line VL passing through the axis AL and a rotational direction R of the rotor 40 are set.
  • the first injection hole 71 is arranged downstream of the vertical line VL in the rotational direction R of the rotor 40 (right side of the drawing).
  • the left side bisected by the vertical line VL passing through the axis AL is defined as a left side area T1
  • the right side bisected by the vertical line VL passing through the axis AL is defined as a right side area T2.
  • the first injection hole 71 is arranged in the left area T1 when the rotor 40 rotates to the left, and is arranged in the right area T2 when the rotor 40 rotates to the right, as viewed in the axial direction.
  • the first injection holes 71 are arranged in the right region T2 when viewed in the axial direction.
  • the first injection holes 71 are arranged only downstream of the vertical line VL in the rotational direction R of the rotor 40 (right side region T2). That is, the first injection hole 71 is not arranged upstream of the vertical line VL in the rotational direction R of the rotor 40 (left region T1).
  • the first injection holes 71 are oriented radially outward of the rotor body 41 .
  • the first injection hole 71 extends along an axially inner side of the rotor body 41 so as to be located radially outward.
  • the first injection hole 71 extends linearly.
  • the center line of the first injection hole 71 is arranged at a position overlapping the axially central portion of the magnet 42 . That is, the magnet 42 is arranged on the extension line of the first injection hole 71 .
  • the center line of the first injection hole 71 is arranged at a position not overlapping the coil 52 . That is, the coil 52 is arranged avoiding the extension line of the first injection hole 71 .
  • the first injection hole 71 and the second injection hole 72 communicate with the main passage on the crankcase 13 side through passages (not shown). Oil is supplied to the main passage from an oil pump (not shown).
  • Oil is supplied to the main passage from an oil pump (not shown).
  • the crankshaft 12 rotates due to the operation of the engine 11 (see FIG. 1)
  • the rotor 40 of the ACG starter motor 39 rotates as the crankshaft 12 rotates.
  • the magnet 42 provided on the rotor 40 and the coil 52 of the stator 50 fixed to the cover 60 rotate relative to each other to generate power. Due to this power generation, the coil 52 and the magnet 42 generate heat.
  • the operation of the engine 11 drives an oil pump (not shown) to supply oil to the main passage.
  • This oil is injected into the generator chamber 59 from a first injection hole 71 and a second injection hole 72 provided in the cover 60 through passages (not shown). Since the first injection hole 71 is directed toward the magnet 42 , the oil injected from the first injection hole 71 collides with the magnet 42 . For example, the oil injected from the first injection hole 71 falls on the magnet 42 along the trajectory indicated by the arrow J1 in FIG.
  • the oil injected from the second injection hole 72 collides with at least one of the coil 52 and the bottom 44 .
  • the oil injected from the second injection hole 72 falls on the coil 52 along the trajectory indicated by the arrow J2 in FIG.
  • the oil injected from the second injection hole 72 falls on the bottom portion 44 of the rotor 40 along the trajectory indicated by the arrow J3 in FIG.
  • the oil injected into the generator chamber 59 from the first injection hole 71 and the second injection hole 72 is scattered in the outer peripheral direction by centrifugal force due to the rotation of the rotor 40 and bounces back toward the coil 52 and the magnet 42 . In this way, the oil injected into the generator chamber 59 from the injection holes 71 and 72 spreads over the constituent elements of the ACG starter motor 39 such as the rotor 40 and stator 50 to cool them.
  • the oil accumulated in the bottom (vertical lower portion) of the generator chamber 59 after cooling of each component is returned to the crankcase 13 through a return passage (not shown).
  • the ACG starter motor 39 (hereinafter also referred to as "rotating electric machine 39") of the above embodiment is of the outer rotor type.
  • the rotary electric machine 39 has a cylindrical rotor body 41 and magnets 42 provided on the inner circumference of the rotor body 41.
  • the rotor 40 is rotatable about the axis AL of the rotor body 41, and the rotor body 41
  • a stator 50 having a stator body 51 provided radially inward with respect to the stator body 50 and a coil 52 wound around the stator body 51, a cover 60 covering the stator 50 from the outside in the axial direction along the axis AL, Prepare.
  • the cover 60 has a first injection hole 71 for injecting oil toward the magnet 42 . According to this configuration, since the oil is injected toward the magnet 42 of the rotor 40 through the first injection hole 71, the magnet 42 of the rotor 40, which is a heat generating member, can be cooled.
  • the rotor body 41 includes a cylindrical portion 43 centered on the axis AL, and a bottom portion 44 continuous with the cylindrical portion 43 and fixed to the crankshaft 12 having the axis AL.
  • the magnet 42 is provided on the inner circumference of the cylindrical portion 43 .
  • the stator main body 51 is provided radially inward of the cylindrical portion 43 .
  • the cover 60 has the second injection hole 72 for injecting the oil toward at least one of the coil 52 and the bottom portion 44 in addition to the first injection hole 71, thereby providing the following effects.
  • the coils 52 of the stator 50 are cooled directly or by rebounding from the bottom portion 44. can be Therefore, the magnet 42 of the rotor 40 and the coil 52 of the stator 50, which are heat generating members, can be cooled.
  • a generator when a generator is applied to a large vehicle such as a large two-wheeled vehicle, it is necessary to increase the size of the generator and use a large amount of power. The profit to do is large.
  • the first injection holes 71 are arranged radially outward of the second injection holes 72, thereby providing the following effects.
  • the magnets 42 are arranged radially outside the coils 52, so the first injection holes 71 and the second injection holes 72 can be preferably arranged. Therefore, both the magnet 42 of the rotor 40 and the coil 52 of the stator 50 are reduced compared to the case where the first injection holes 71 are arranged radially inside the second injection holes 72 in the outer rotor type rotary electric machine. can be effectively cooled.
  • the axis AL is arranged horizontally, and the first injection holes 71 are arranged vertically above the axis AL, thereby providing the following effects.
  • the portion vertically below the axis AL has little need for cooling.
  • the portion vertically above the axis AL tends to retain heat and requires cooling.
  • the first injection holes 71 can intensively cool the portion vertically above the axis AL, more effective cooling can be performed.
  • the axis AL is arranged horizontally, and the left side bisected by the vertical line VL passing through the axis AL is defined as the left region T1, and the right side bisected by the vertical line VL is defined as the left region T1.
  • the first injection hole 71 is arranged in the left region T1 when the rotor 40 rotates to the left, and is arranged in the right region T2 when the rotor 40 rotates to the right, as viewed from the axial direction.
  • the cooling effect of the oil due to the rotation of the rotor 40 is more difficult to obtain at a portion downstream in the rotational direction R of the vertical line VL passing through the axis AL than at a portion upstream in the rotational direction R of the rotor 40 .
  • the first injection holes 71 can intensively cool the portion downstream of the vertical line VL passing through the axis AL in the rotation direction R of the rotor 40, more effective cooling can be achieved. It can be carried out.
  • the magnet 42 is provided on the inner circumference of the rotor main body 41 , the stator main body 51 is provided radially inward of the rotor main body 41 , and the first injection holes 71 are provided radially outward of the rotor main body 41 .
  • the following effects are produced by being oriented to.
  • the magnets 42 are arranged radially outside of the coils 52, so the first injection holes 71 can be preferably arranged. Therefore, the magnets 42 of the rotor 40 can be effectively cooled compared to the case where the first injection holes 71 are oriented radially inward of the rotor main body 41 in the outer rotor type rotary electric machine.
  • the magnet 42 is arranged on the extension line of the first injection hole 71, and the coil 52 is arranged to avoid the extension line of the first injection hole 71, thereby providing the following effects.
  • the oil injected from the first injection hole 71 tends to avoid the coil 52 and hit the magnet 42 directly.
  • the magnet 42 can be effectively cooled.
  • the power unit 10 of the above-described embodiment includes the rotating electric machine 39 described above. According to this configuration, it is possible to provide the power unit 10 capable of cooling the magnet 42 of the rotor 40, which is a heat generating member.
  • the rotary electric machine 39 can start the engine 11, thereby providing the following effects.
  • the magnet 42 of the rotor 40 can be cooled in the rotating electrical machine 39 capable of starting the engine 11 .
  • the first injection hole injects oil toward the magnet
  • the present invention is not limited to this.
  • the first injection hole may inject liquid other than oil toward the magnet, or may inject gas.
  • the mode of the fluid that the first injection hole injects toward the magnet can be changed according to the required specifications.
  • the rotating electrical machine may be of the inner rotor type.
  • the rotor in an inner rotor type rotary electric machine, has a tubular rotor body and magnets provided on the outer periphery of the rotor body.
  • the stator has a stator body provided radially outside the rotor body, and a coil wound around the stator body.
  • the rotary electric machine has a cylindrical rotor body and magnets provided on either one of the inner circumference and the outer circumference of the rotor body, the rotor being rotatable about the axis of the rotor body, and the rotor
  • a stator having a stator main body provided on either one of the radially inner side and the radially outer side with respect to the main body and a coil wound around the stator main body may be provided.
  • the aspect of the rotating electric machine can be changed according to the required specifications.
  • the cover has a second injection hole for injecting oil toward at least one of the coil and the bottom, in addition to the first injection hole.
  • the cover is not limited to this.
  • the cover may not have the second injection holes.
  • the cover may have only the first injection holes.
  • the installation mode of the injection holes can be changed according to the required specifications.
  • the first injection hole may be arranged radially inside the second injection hole.
  • the magnet is arranged radially inward of the coil.
  • the one injection hole and the second injection hole can be arranged appropriately.
  • the arrangement of each injection hole can be changed according to required specifications.
  • the present invention is not limited to this.
  • the first injection hole may be arranged vertically below the axis.
  • the arrangement of the first injection holes with respect to the axis can be changed according to the required specifications.
  • the axis is arranged horizontally, and when viewed from the axial direction, the left side bisected by the vertical line passing through the axis is the left area, and the right side bisected by the vertical line is the right area.
  • the first injection hole is arranged in the left area when the rotor rotates to the left and is arranged in the right area when the rotor rotates to the right when viewed from the axial direction
  • the present invention is not limited to this. do not have.
  • the first injection hole when viewed from the axial direction, the first injection hole may be arranged in the right area when the rotor rotates to the left, and may be arranged in the left area when the rotor rotates to the right.
  • the arrangement of the first injection holes with respect to the vertical line passing through the axis can be changed according to the required specifications.
  • the first injection holes are oriented radially outward of the rotor body, but this is not the only option.
  • the first injection holes may be oriented in the axial direction of the rotor body, or may be oriented radially inward of the rotor body.
  • the rotating electrical machine is of the inner rotor type, the magnets are arranged radially inward of the coils.
  • the holes can be conveniently arranged.
  • the aspect of the first injection hole can be changed according to the required specifications.
  • the magnet is arranged on the extension line of the first injection hole, and the coil is arranged to avoid the extension line of the first injection hole.
  • the coil may be arranged on the extension line of the first injection hole.
  • the arrangement of the magnets and coils with respect to the extension of the first injection holes can be changed according to the required specifications.
  • an ACG starter motor capable of starting an engine has been described as an example of a rotating electric machine, but it is not limited to this.
  • the rotating electric machine may be a motor (starter, generator) other than the ACG starter motor.
  • the aspect of the rotating electric machine can be changed according to the required specifications.
  • a single-cylinder engine in which the crankshaft extends along the vehicle width direction has been described as an example of the engine, but the invention is not limited to this.
  • the engine may be a multi-cylinder engine.
  • aspects of the engine can be changed according to required specifications.
  • the rotating electric machine may be applied to structures other than straddle-type vehicles (for example, working machines, production facilities, etc.).
  • a motorcycle having an engine mounted on the vehicle body side has been described as an example of a straddle-type vehicle, but the invention is not limited to this.
  • the straddle-type vehicle may be a unit-swing type motorcycle.
  • the aspect of the straddle-type vehicle can be changed according to the required specifications.
  • straddle-type vehicles include general vehicles in which a driver straddles the vehicle body, motorcycles (including motorized bicycles and scooter-type vehicles). ), but also three-wheeled vehicles (including vehicles with two front wheels and one rear wheel, as well as vehicles with one front wheel and two rear wheels).
  • the present invention is applicable not only to motorcycles but also to four-wheeled vehicles such as automobiles.
  • the configuration in the above embodiment is an example of the present invention, and various modifications, such as replacing the constituent elements of the embodiment with known constituent elements, are possible without departing from the gist of the present invention.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

This dynamo-electric machine is provided with: a rotor (40) having a cylindrical rotor main body (41) and a magnet (42) provided to either one of an inner circumference and an outer circumference of the rotor main body (41), the rotor (40) being able to rotate about an axis line (AL) of the rotor main body (41); a stator (50) having a stator main body (51) provided either radially inward or radially outward of the rotor main body (41) and a coil (52) wound around the stator main body (51); and a cover (60) covering the stator (50) from the outside in an axial direction along the axis line (AL), the cover (60) having a first spray hole (71) for spraying a fluid toward the magnet (42).

Description

回転電機及びパワーユニットRotating electric machine and power unit
　本発明は、回転電機及びパワーユニットに関する。
　本発明は、２０２１年２月２５日に、日本に出願された特願２０２１－０２８３２６号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to rotating electric machines and power units.
The present invention claims priority based on Japanese Patent Application No. 2021-028326 filed in Japan on February 25, 2021, the content of which is incorporated herein.
　従来、内燃機関用発電機において、ステータに設けられたコイルを冷却する構造が知られている（例えば、特許文献１参照）。特許文献１の発電機は、内燃機関のクランク軸に固定された有底円筒状のロータと、ロータの円筒部内周に配置された永久磁石にコアを対向させて配置されたステータと、ステータを保持するカバーと、を備える。カバーには、ロータの底面へ向けてオイルを噴射させるジェットが設けられている。ステータのコアには、ジェットから噴射されたオイルが通過可能な孔が設けられている。ロータの底面には、リベットの頭が出ている。ジェットから噴射されたオイルは、リベットの頭で跳ね返されて攪拌・飛散する。ジェットから噴射されたオイルは、コイルよりも内周側に衝突するため、ロータの回転による遠心力で外周方向に飛散しつつコイルの方向に跳ね返される。 　Conventionally, in a generator for an internal combustion engine, a structure for cooling a coil provided in a stator is known (see Patent Document 1, for example). The generator of Patent Document 1 includes a bottomed cylindrical rotor fixed to a crankshaft of an internal combustion engine, a stator arranged with a core opposed to a permanent magnet arranged on the inner circumference of the cylindrical portion of the rotor, and a stator. and a cover for holding. The cover is provided with jets for injecting oil toward the bottom surface of the rotor. The stator core is provided with holes through which the oil injected from the jet can pass. Rivet heads protrude from the bottom surface of the rotor. The oil injected from the jet bounces off the head of the rivet and is stirred and scattered. Since the oil injected from the jet collides with the inner peripheral side of the coil, the centrifugal force caused by the rotation of the rotor scatters the oil in the outer peripheral direction and bounces back toward the coil.
特開２００４－３２０９４４号公報JP 2004-320944 A
　ところで、発電機の出力を向上する場合は、発電機の大型化や大電力の使用が必要となり、発熱部材の更なる冷却が要求される。そのため、ステータのコイルの他に、ロータのマグネットを冷却する技術が求められている。 By the way, to improve the output of the generator, it is necessary to increase the size of the generator and use a large amount of power, which requires further cooling of the heat-generating members. Therefore, there is a demand for a technique for cooling the rotor magnets in addition to the stator coils.
　そこで本発明は、発熱部材であるロータのマグネットを冷却することを目的とする。 Therefore, an object of the present invention is to cool the magnet of the rotor, which is a heat generating member.
　上記課題の解決手段として、本発明の態様は以下の構成を有する。
（１）本発明の態様に係る回転電機は、筒状のロータ本体（４１）と、前記ロータ本体（４１）の内周及び外周のうちいずれか一方に設けられたマグネット（４２）と、を有し、前記ロータ本体（４１）の軸線（ＡＬ）を中心に回転可能なロータ（４０）と、前記ロータ本体（４１）に対して径方向内側及び径方向外側のうちいずれか一方に設けられたステータ本体（５１）と、前記ステータ本体（５１）に巻き掛けられたコイル（５２）と、を有するステータ（５０）と、前記軸線（ＡＬ）に沿う軸方向の外側から前記ステータ（５０）を覆うカバー（６０）と、を備え、前記カバー（６０）は、前記マグネット（４２）に向けて流体を噴射する第一噴射孔（７１）を有する。 As means for solving the above problems, aspects of the present invention have the following configurations.
(1) A rotary electric machine according to an aspect of the present invention includes a cylindrical rotor body (41) and magnets (42) provided on either one of the inner circumference and the outer circumference of the rotor body (41). and a rotor (40) rotatable about the axis (AL) of the rotor body (41); and a coil (52) wound around the stator body (51); and the stator (50) is axially outward along the axis (AL) and a cover (60) covering the magnet (42), the cover (60) having a first injection hole (71) for injecting fluid toward the magnet (42).
（２）上記（１）に記載の回転電機では、前記回転電機（３９）は、アウターロータ形式であり、前記ロータ本体（４１）は、前記軸線（ＡＬ）を中心とする円筒状の円筒部（４３）と、前記円筒部（４３）と連続するとともに、前記軸線（ＡＬ）を有するシャフト（１２）に固定された底部（４４）と、を備え、前記マグネット（４２）は、前記円筒部（４３）の内周に設けられ、前記ステータ本体（５１）は、前記円筒部（４３）よりも径方向内側に設けられ、前記カバー（６０）は、前記第一噴射孔（７１）とは別に、前記コイル（５２）及び前記底部（４４）の少なくとも一方に向けて流体を噴射する第二噴射孔（７２）を有してもよい。 (2) In the rotating electrical machine described in (1) above, the rotating electrical machine (39) is of the outer rotor type, and the rotor body (41) is a cylindrical portion centered on the axis (AL). (43) and a bottom (44) continuous with said cylindrical portion (43) and fixed to a shaft (12) having said axis (AL), said magnet (42) being connected to said cylindrical portion (43), the stator body (51) is provided radially inward of the cylindrical portion (43), and the cover (60) is different from the first injection hole (71). Separately, there may be a second injection hole (72) for injecting fluid toward at least one of the coil (52) and the bottom (44).
（３）上記（２）に記載の回転電機では、前記第一噴射孔（７１）は、前記第二噴射孔（７２）よりも径方向外側に配置されていてもよい。 (3) In the rotary electric machine described in (2) above, the first injection hole (71) may be arranged radially outside the second injection hole (72).
（４）上記（１）から（３）のいずれか一項に記載の回転電機では、前記軸線（ＡＬ）は、水平に沿って配置され、前記第一噴射孔（７１）は、前記軸線（ＡＬ）よりも鉛直上方に配置されていてもよい。 (4) In the rotary electric machine according to any one of (1) to (3) above, the axis (AL) is arranged horizontally, and the first injection holes (71) are arranged along the axis ( AL) may be arranged vertically above.
（５）上記（１）から（４）のいずれか一項に記載の回転電機では、前記軸線（ＡＬ）は、水平に沿って配置され、前記軸方向から見て、前記軸線（ＡＬ）を通る前記鉛直線（ＶＬ）により二分された左側を左側領域（Ｔ１）とし、前記鉛直線（ＶＬ）により二分された右側を右側領域（Ｔ２）としたとき、前記第一噴射孔（７１）は、前記軸方向から見て、前記ロータ（４０）が左回転するときは前記左側領域（Ｔ１）に配置され、前記ロータ（４０）が右回転するときは前記右側領域（Ｔ２）に配置されていてもよい。 (5) In the rotary electric machine according to any one of (1) to (4) above, the axis (AL) is arranged horizontally, and when viewed from the axial direction, the axis (AL) When the left side bisected by the vertical line (VL) passing through is defined as a left side area (T1) and the right side bisected by the vertical line (VL) is defined as a right side area (T2), the first injection hole (71) is , when viewed from the axial direction, the rotor (40) is arranged in the left area (T1) when the rotor (40) rotates to the left, and is arranged in the right area (T2) when the rotor (40) rotates to the right. may
（６）上記（１）から（５）のいずれか一項に記載の回転電機では、前記回転電機（３９）は、アウターロータ形式であり、前記マグネット（４２）は、前記ロータ本体（４１）の内周に設けられ、前記ステータ本体（５１）は、前記ロータ本体（４１）よりも径方向内側に設けられ、前記第一噴射孔（７１）は、前記ロータ本体（４１）の径方向外側を指向していてもよい。 (6) In the rotating electric machine according to any one of (1) to (5) above, the rotating electric machine (39) is of an outer rotor type, and the magnet (42) is arranged in the rotor main body (41). The stator body (51) is provided radially inward of the rotor body (41), and the first injection holes (71) are radially outward of the rotor body (41). may be directed to
（７）上記（６）に記載の回転電機では、前記マグネット（４２）は、前記第一噴射孔（７１）の延長線上に配置され、前記コイル（５２）は、前記第一噴射孔（７１）の延長線を避けて配置されていてもよい。 (7) In the rotary electric machine described in (6) above, the magnet (42) is arranged on an extension line of the first injection hole (71), and the coil (52) is arranged on the first injection hole (71). ) may be arranged avoiding the extension line of
（８）本発明の態様に係るパワーユニットは、上記（１）から（７）のいずれか一項に記載の回転電機（３９）を備える。 (8) A power unit according to an aspect of the present invention includes the rotating electrical machine (39) according to any one of (1) to (7) above.
（９）上記（８）に記載のパワーユニットでは、前記回転電機（３９）は、内燃機関（１１）の始動が可能であってもよい。 (9) In the power unit described in (8) above, the rotating electric machine (39) may be capable of starting the internal combustion engine (11).
　本発明の上記（１）に記載の回転電機によれば、筒状のロータ本体と、ロータ本体の内周及び外周のうちいずれか一方に設けられたマグネットと、を有し、ロータ本体の軸線を中心に回転可能なロータと、ロータ本体に対して径方向内側及び径方向外側のうちいずれか一方に設けられたステータ本体と、ステータ本体に巻き掛けられたコイルと、を有するステータと、軸線に沿う軸方向の外側からステータを覆うカバーと、を備え、カバーは、マグネットに向けて流体を噴射する第一噴射孔を有することで、以下の効果を奏する。
　第一噴射孔によりロータのマグネットに向けて流体が噴射されるため、発熱部材であるロータのマグネットを冷却することができる。 According to the rotary electric machine according to the above (1) of the present invention, the rotor body has a cylindrical rotor body, and the magnets are provided on either one of the inner circumference and the outer circumference of the rotor body, and the axis line of the rotor body a stator having a rotor rotatable about a center, a stator body provided on either one of a radially inner side and a radially outer side with respect to the rotor body, and a coil wound around the stator body; and a cover that covers the stator from the outside in the axial direction along the . The cover has the first injection hole that injects the fluid toward the magnet, thereby providing the following effects.
Since the first injection hole injects the fluid toward the magnet of the rotor, the magnet of the rotor, which is a heat generating member, can be cooled.
　本発明の上記（２）に記載の回転電機によれば、回転電機は、アウターロータ形式であり、ロータ本体は、軸線を中心とする円筒状の円筒部と、円筒部と連続するとともに、軸線を有するシャフトに固定された底部と、を備え、マグネットは、円筒部の内周に設けられ、ステータ本体は、円筒部よりも径方向内側に設けられ、カバーは、第一噴射孔とは別に、コイル及び底部の少なくとも一方に向けて流体を噴射する第二噴射孔を有することで、以下の効果を奏する。
　第二噴射孔によりステータのコイル及びロータ本体の底部の少なくとも一方に向けて流体が噴射されるため、ステータのコイルを直に冷却したり底部からの跳ね返りで冷却したりすることができる。したがって、発熱部材であるロータのマグネットとステータのコイルとを冷却することができる。
　例えば、大型の二輪車等の大型車両へ発電機を適用した場合には、発電機の大型化や大電力の使用が必要となるため、ロータのマグネット及びステータのコイルの両方を冷却する実益が大きい。 According to the rotating electrical machine described in (2) above of the present invention, the rotating electrical machine is of the outer rotor type, and the rotor body includes a cylindrical portion centered on the axis, a cylindrical portion continuous with the cylindrical portion, and an axis a bottom portion fixed to a shaft having a magnet provided on the inner periphery of the cylindrical portion; a stator body provided radially inward of the cylindrical portion; and a cover separately from the first injection hole , the second injection hole for injecting the fluid toward at least one of the coil and the bottom provides the following effects.
Since the fluid is injected toward at least one of the coils of the stator and the bottom of the rotor body by the second injection holes, the coils of the stator can be cooled directly or by rebounding from the bottom. Therefore, the magnet of the rotor and the coil of the stator, which are heat generating members, can be cooled.
For example, when a generator is applied to a large vehicle such as a large motorcycle, it is necessary to increase the size of the generator and use a large amount of electric power. .
　本発明の上記（３）に記載の回転電機によれば、第一噴射孔は、第二噴射孔よりも径方向外側に配置されていることで、以下の効果を奏する。
　回転電機がアウターロータ形式である場合は、マグネットはコイルよりも径方向外側に配置されているため、第一噴射孔及び第二噴射孔をそれぞれ好適に配置することができる。したがって、アウターロータ形式の回転電機において第一噴射孔が第二噴射孔よりも径方向内側に配置されている場合と比較して、ロータのマグネット及びステータのコイルの両方を効果的に冷却することができる。 According to the rotary electric machine described in (3) above of the present invention, the first injection hole is arranged radially outward of the second injection hole, thereby providing the following effects.
When the rotary electric machine is of the outer rotor type, the magnets are arranged radially outside the coils, so the first injection holes and the second injection holes can be preferably arranged. Therefore, both the magnet of the rotor and the coil of the stator can be effectively cooled compared to the case where the first injection holes are arranged radially inward of the second injection holes in the outer rotor type electric rotating machine. can be done.
　本発明の上記（４）に記載の回転電機によれば、軸線は、水平に沿って配置され、第一噴射孔は、軸線よりも鉛直上方に配置されていることで、以下の効果を奏する。
　例えば、軸線が水平に沿って配置され、軸線よりも鉛直下方に流体が溜まっている場合、軸線よりも鉛直下方の部分は冷却の必要性が乏しい。一方、軸線よりも鉛直上方の部分は、熱がこもりやすく、冷却の必要性が高い。本態様によれば、第一噴射孔により、軸線よりも鉛直上方の部分を重点的に冷却することができるため、より効果的な冷却を行うことができる。 According to the rotary electric machine described in (4) above of the present invention, the axis is arranged horizontally, and the first injection hole is arranged vertically above the axis, so that the following effects are achieved. .
For example, when the axis is arranged horizontally and the fluid is accumulated vertically below the axis, the portion vertically below the axis has little need for cooling. On the other hand, the portion vertically above the axis tends to retain heat, and requires cooling. According to this aspect, the first injection hole can intensively cool the portion vertically above the axis, so that more effective cooling can be performed.
　本発明の上記（５）に記載の回転電機によれば、軸線は、水平に沿って配置され、軸方向から見て、軸線を通る鉛直線により二分された左側を左側領域とし、前記鉛直線により二分された右側を右側領域としたとき、第一噴射孔は、軸方向から見て、ロータが左回転するときは左側領域に配置され、ロータが右回転するときは右側領域に配置されていることで、以下の効果を奏する。
　例えば、軸線が水平に沿って配置され、軸線よりも鉛直下方に流体が溜まっている場合、流体はロータの回転によりかき回される。ロータの回転による流体の冷却効果は、軸線を通る鉛直線よりもロータの回転方向下流側の部分ではロータの回転方向上流側の部分よりも得にくい。本態様によれば、第一噴射孔により、軸線を通る鉛直線よりもロータの回転方向下流側の部分を重点的に冷却することができるため、より効果的な冷却を行うことができる。 According to the rotary electric machine according to the above (5) of the present invention, the axis is arranged horizontally, and the left side bisected by the vertical line passing through the axis is defined as the left area when viewed from the axial direction, and the vertical line Assuming that the right side divided by is the right side region, the first injection hole is arranged in the left side region when the rotor rotates to the left, and is arranged in the right side region when the rotor rotates to the right, as viewed from the axial direction. By being there, the following effects are achieved.
For example, when the axis is arranged horizontally and the fluid is accumulated vertically below the axis, the fluid is stirred by the rotation of the rotor. The cooling effect of the fluid due to the rotation of the rotor is more difficult to obtain in the downstream side of the rotor in the rotational direction than the upstream side of the rotor in the rotational direction of the vertical line passing through the axis. According to this aspect, since the first injection hole can intensively cool the portion on the downstream side in the rotation direction of the rotor with respect to the vertical line passing through the axis, more effective cooling can be performed.
　本発明の上記（６）に記載の回転電機によれば、回転電機は、アウターロータ形式であり、マグネットは、ロータ本体の内周に設けられ、ステータ本体は、ロータ本体よりも径方向内側に設けられ、第一噴射孔は、ロータ本体の径方向外側を指向していることで、以下の効果を奏する。
　回転電機がアウターロータ形式である場合は、マグネットはコイルよりも径方向外側に配置されているため、第一噴射孔を好適に配置することができる。したがって、アウターロータ形式の回転電機において第一噴射孔が径方向内側に指向している場合と比較して、ロータのマグネットを効果的に冷却することができる。 According to the rotating electrical machine described in (6) above of the present invention, the rotating electrical machine is of the outer rotor type, the magnet is provided on the inner circumference of the rotor body, and the stator body is arranged radially inward of the rotor body. The following effects are achieved by providing the first injection holes directed radially outward of the rotor body.
When the rotary electric machine is of the outer rotor type, the magnets are arranged radially outside the coils, so the first injection holes can be arranged favorably. Therefore, it is possible to effectively cool the magnet of the rotor, compared to the case where the first injection holes are oriented radially inward in the outer rotor type rotary electric machine.
　本発明の上記（７）に記載の回転電機によれば、マグネットは、第一噴射孔の延長線上に配置され、コイルは、第一噴射孔の延長線を避けて配置されていることで、以下の効果を奏する。
　コイルが第一噴射孔の延長線上に配置されている場合と比較して、第一噴射孔から噴射された流体は、コイルを避けてマグネットに直に当たりやすいため、ロータのマグネットを効果的に冷却することができる。 According to the rotary electric machine according to the above (7) of the present invention, the magnet is arranged on the extension line of the first injection hole, and the coil is arranged to avoid the extension line of the first injection hole, It has the following effects.
Compared to the case where the coil is arranged on the extension line of the first injection hole, the fluid injected from the first injection hole tends to avoid the coil and hit the magnet directly, so the rotor magnet is effectively cooled. can do.
　本発明の上記（８）に記載のパワーユニットによれば、上記の回転電機を備えることで、以下の効果を奏する。
　発熱部材であるロータのマグネットを冷却することができるパワーユニットを提供することができる。 According to the power unit described in (8) above of the present invention, by including the rotating electric machine described above, the following effects can be obtained.
It is possible to provide a power unit that can cool the magnet of the rotor, which is a heat generating member.
　本発明の上記（９）に記載のパワーユニットによれば、回転電機は、内燃機関の始動が可能であることで、以下の効果を奏する。
　内燃機関の始動が可能な回転電機において、ロータのマグネットを冷却することができる。 According to the power unit set forth in (9) above of the present invention, the rotating electric machine can start the internal combustion engine, thereby providing the following effects.
In a rotating electrical machine capable of starting an internal combustion engine, the magnet of the rotor can be cooled.
実施形態の自動二輪車の右側面図である。1 is a right side view of the motorcycle of the embodiment; FIG. 図１のＩＩ－ＩＩ断面を含む前面図である。FIG. 2 is a front view including a II-II section of FIG. 1; 図２の矢視ＩＩＩから見た、各噴射孔の配置の説明図である。FIG. 3 is an explanatory diagram of the arrangement of injection holes as viewed from arrow III in FIG. 2 ;
　以下、本発明の実施形態について図面を参照して説明する。以下の説明では、回転電機を適用した鞍乗型車両の一例として自動二輪車を挙げて説明する。以下、自動二輪車を単に「車両」ということがある。なお、以下の説明における前後左右等の向きは、特に記載が無ければ以下に説明する車両における向きと同一とする。また、以下の説明に用いる図中適所には、車両前方を示す矢印ＦＲ、車両左方を示す矢印ＬＨ、車両上方を示す矢印ＵＰが示されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a motorcycle is taken as an example of a straddle-type vehicle to which a rotating electric machine is applied. Hereinafter, the motorcycle may be simply referred to as a "vehicle". Note that directions such as front, rear, left, and right in the following description are the same as directions in the vehicle described below unless otherwise specified. An arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, and an arrow UP indicating the upper side of the vehicle are shown at appropriate locations in the drawings used in the following description.
＜車両全体＞
　図１に示すように、自動二輪車１（鞍乗型車両）は、ハンドル２によって操向される前輪３と、動力源を含むパワーユニット１０によって駆動される後輪４と、パワーユニット１０を支持する車体フレーム２０と、を備える。 <Whole vehicle>
As shown in FIG. 1, a motorcycle 1 (straddle-type vehicle) includes front wheels 3 steered by a handlebar 2, rear wheels 4 driven by a power unit 10 including a power source, and a vehicle body supporting the power unit 10. a frame 20;
　車体フレーム２０は、ハンドル２を操向可能に支持するヘッドパイプ２１と、ヘッドパイプ２１から後下方に延びる左右一対のメインフレーム２２と、メインフレーム２２よりも急峻にヘッドパイプ２１から後下方に延びるダウンフレーム２３と、メインフレーム２２の後端部から下方に延びる左右一対のピボットプレート２５と、メインフレーム２２の後部から後方に延びる左右一対のシートレール２６と、ピボットプレート２５の上部から後上方に延びてシートレール２６の後端部に接続される左右一対のリアフレーム２７と、を備える。 The vehicle body frame 20 includes a head pipe 21 supporting the steering wheel 2 so as to be steerable, a pair of left and right main frames 22 extending rearward and downward from the head pipe 21 , and extending rearward and downward from the head pipe 21 steeper than the main frames 22 . A down frame 23, a pair of left and right pivot plates 25 extending downward from the rear end portion of the main frame 22, a pair of left and right seat rails 26 extending rearward from the rear portion of the main frame 22, and a rear upper portion of the pivot plate 25. A pair of left and right rear frames 27 extending and connected to rear end portions of the seat rails 26 are provided.
　後輪４の車軸４ａは、前後方向に延びるスイングアーム５の後端部に軸支されている。スイングアーム５の前端部は、ピボットプレート２５にピボット軸２５ａを介して上下揺動可能に支持されている。左右メインフレーム２２には、燃料タンク７が支持されている。燃料タンク７の後方には、左右シートレール２６に支持されたシート８が設けられている。 The axle 4a of the rear wheel 4 is pivotally supported by the rear end of the swing arm 5 extending in the front-rear direction. A front end portion of the swing arm 5 is supported by a pivot plate 25 via a pivot shaft 25a so as to be vertically swingable. A fuel tank 7 is supported by the left and right main frames 22 . A seat 8 supported by left and right seat rails 26 is provided behind the fuel tank 7 .
＜パワーユニット＞
　パワーユニット１０は、可燃性の混合気を燃焼させて出力を得る内燃機関であるエンジン１１と、始動機及び発電機として機能するＡＣＧスタータモータ３９（回転電機）と、クランクシャフト１２（シャフト）に連結されてエンジン１１からの動力を駆動輪である後輪４に伝達する不図示の変速機（動力伝達機構）と、を備える。 <Power unit>
The power unit 10 is connected to an engine 11 that is an internal combustion engine that burns a combustible air-fuel mixture to obtain output, an ACG starter motor 39 (rotating electric machine) that functions as a starter and a generator, and a crankshaft 12 (shaft). and a transmission (power transmission mechanism) (not shown) that transmits power from the engine 11 to the rear wheels 4 that are drive wheels.
＜エンジン＞
　エンジン１１は、車体フレーム２０に固定的に支持されている。エンジン１１は、クランクシャフト１２を車幅方向に沿わせた単気筒エンジンである。エンジン１１は、クランクシャフト１２を回転可能に支持しかつ収容するクランクケース１３と、クランクケース１３の前側上部から上方に向かってやや前傾して起立するシリンダ１４と、を備える。クランクケース１３は、エンジン１１の下部を構成する。クランクケース１３の前端部は、ハンガーブラケット１５に支持されている。クランクケース１３の後端部は、メインフレーム２２の下端部に支持されている。 <Engine>
The engine 11 is fixedly supported by the body frame 20 . The engine 11 is a single-cylinder engine having a crankshaft 12 along the vehicle width direction. The engine 11 includes a crankcase 13 that rotatably supports and accommodates the crankshaft 12, and a cylinder 14 that rises slightly forward from the front upper portion of the crankcase 13 and stands upward. The crankcase 13 constitutes the lower portion of the engine 11 . A front end portion of the crankcase 13 is supported by a hanger bracket 15 . A rear end portion of the crankcase 13 is supported by a lower end portion of the main frame 22 .
　シリンダ１４の下部（シリンダヘッドの排気ポート）には、排気管１６が接続されている。排気管１６は、シリンダ１４の下方で後方へ湾曲して延びた後、ＡＣＧスタータモータ３９のカバー６０の下方位置において後上方かつ車幅方向外側に屈曲して延びている。排気管１６の後端部は、後輪４の右側方に配置されたマフラー１７（消音器）の前端部に接続されている。 An exhaust pipe 16 is connected to the lower part of the cylinder 14 (exhaust port of the cylinder head). The exhaust pipe 16 bends and extends rearward below the cylinder 14 , and then bends and extends rearwardly upward and outwardly in the vehicle width direction at a position below the cover 60 of the ACG starter motor 39 . A rear end portion of the exhaust pipe 16 is connected to a front end portion of a muffler 17 (silencer) disposed on the right side of the rear wheel 4 .
＜ＡＣＧスタータモータ＞
　ＡＣＧスタータモータ３９は、エンジン１１の始動が可能である始動機として機能するとともに、発電機として機能する。ＡＣＧスタータモータ３９には、不図示のバッテリが接続されている。バッテリは、ＡＣＧスタータモータ３９が始動機として機能するときには、ＡＣＧスタータモータ３９に電力を供給する。バッテリは、ＡＣＧスタータモータ３９が発電機として機能するときには、ＡＣＧスタータモータ３９の回生電力が充電される。なお、エンジン１１及びＡＣＧスタータモータ３９の制御は、不図示の制御ユニットにより行われる。 <ACG starter motor>
The ACG starter motor 39 functions as a starter capable of starting the engine 11 and also functions as a generator. A battery (not shown) is connected to the ACG starter motor 39 . The battery powers the ACG starter motor 39 when the ACG starter motor 39 functions as a starter. The battery is charged with regenerated electric power of the ACG starter motor 39 when the ACG starter motor 39 functions as a generator. The engine 11 and the ACG starter motor 39 are controlled by a control unit (not shown).
　図２に示すように、ＡＣＧスタータモータ３９は、アウターロータ形式のモータである。ＡＣＧスタータモータ３９は、ロータ４０と、ステータ５０と、カバー６０と、を備える。
　ロータ４０は、カップ状（有底円筒状）に形成されている。ロータ４０は、ステータ５０の周囲を覆っている。ロータ４０は、ステータ５０に対して間隔をあけて配置されている。ロータ４０は、クランクシャフト１２（図２において二点鎖線で示す。）に固定されている。ロータ４０は、筒状のロータ本体４１と、ロータ本体４１の内周に設けられたマグネット４２と、を備える。ロータ４０は、ロータ本体４１の軸線ＡＬを中心に回転可能である。 As shown in FIG. 2, the ACG starter motor 39 is an outer rotor type motor. The ACG starter motor 39 has a rotor 40 , a stator 50 and a cover 60 .
The rotor 40 is formed in a cup shape (cylindrical shape with a bottom). The rotor 40 surrounds the stator 50 . Rotor 40 is spaced from stator 50 . The rotor 40 is fixed to the crankshaft 12 (indicated by a two-dot chain line in FIG. 2). The rotor 40 includes a tubular rotor body 41 and magnets 42 provided on the inner circumference of the rotor body 41 . The rotor 40 is rotatable around the axis AL of the rotor body 41 .
　ロータ本体４１は、軸線ＡＬを中心とする円筒状の円筒部４３と、円筒部４３と連続する底部４４と、を備える。
　円筒部４３は、ステータ５０よりも径方向外側に配置されている。円筒部４３は、マグネット４２を取り付け可能なマグネット取付凹部４５を有する。マグネット取付凹部４５は、円筒部４３の内周面から径方向外側に窪んでいる。マグネット取付凹部４５は、マグネット４２と略同じ断面形状を有する。
　底部４４は、円筒部４３において軸線ＡＬに沿う軸方向の内端部から径方向内側に延びている。底部４４のボス部（径方向中央部）は、軸線ＡＬを有するクランクシャフト１２のテーパ部（右端部）に固定されている。 The rotor body 41 includes a cylindrical portion 43 centered on the axis AL and a bottom portion 44 continuous with the cylindrical portion 43 .
The cylindrical portion 43 is arranged radially outside the stator 50 . The cylindrical portion 43 has a magnet attachment recess 45 to which the magnet 42 can be attached. The magnet mounting recess 45 is recessed radially outward from the inner peripheral surface of the cylindrical portion 43 . The magnet mounting recess 45 has substantially the same cross-sectional shape as the magnet 42 .
The bottom portion 44 extends radially inward from the axial inner end of the cylindrical portion 43 along the axis AL. A boss portion (central portion in the radial direction) of the bottom portion 44 is fixed to a taper portion (right end portion) of the crankshaft 12 having the axis AL.
　例えば、マグネット４２は、永久磁石である。マグネット４２は、円筒部４３の内周に設けられている。マグネット４２は、マグネット取付凹部４５に取り付けられている。ロータ４０の内周面は、マグネット４２がマグネット取付凹部４５に取り付けられた状態において、軸方向に連続して連なる（面一になる）ように形成されている。 For example, the magnet 42 is a permanent magnet. The magnet 42 is provided on the inner circumference of the cylindrical portion 43 . The magnet 42 is attached to the magnet attachment recess 45 . The inner peripheral surface of the rotor 40 is formed so as to be continuous (flush) in the axial direction when the magnets 42 are attached to the magnet attachment recesses 45 .
　ステータ５０は、ロータ本体４１に対して径方向内側に設けられたステータ本体５１と、ステータ本体５１に巻き掛けられたコイル５２と、を備える。
　例えば、ステータ本体５１は、表面が絶縁された複数の鉄板を積層したコアである。ステータ本体５１は、円筒部４３よりも径方向内側に設けられている。
　コイル５２は、ステータ本体５１の軸方向の両側面に重ね合わせた絶縁板５３を介してステータ本体５１に巻回されている。コイル５２は、不図示のハーネスにより引き出され、制御ユニットに接続されている。 The stator 50 includes a stator body 51 provided radially inside the rotor body 41 and a coil 52 wound around the stator body 51 .
For example, the stator main body 51 is a core in which a plurality of iron plates with insulated surfaces are laminated. The stator main body 51 is provided radially inward of the cylindrical portion 43 .
The coil 52 is wound around the stator body 51 via insulating plates 53 superimposed on both axial side surfaces of the stator body 51 . The coil 52 is pulled out by a harness (not shown) and connected to the control unit.
　カバー６０は、軸線ＡＬに沿う軸方向の外側からロータ４０及びステータ５０を覆っている。カバー６０は、クランクケース１３の車幅方向右側部に連結されている。カバー６０は、ステータ５０を保持する発電機室カバーとして機能する。 The cover 60 covers the rotor 40 and the stator 50 from the outside in the axial direction along the axis AL. The cover 60 is connected to the right side portion of the crankcase 13 in the vehicle width direction. The cover 60 functions as a generator room cover that holds the stator 50 .
　図３に示すように、カバー６０の外周部には、カバー６０をクランクケース１３（図２参照）に連結するためのボルト（不図示）が挿通されるボルト孔を有する複数の連結部６６が設けられている。複数の連結部６６は、周方向に間隔をあけて配置されている。 As shown in FIG. 3, the outer peripheral portion of the cover 60 is provided with a plurality of connecting portions 66 having bolt holes through which bolts (not shown) are inserted for connecting the cover 60 to the crankcase 13 (see FIG. 2). is provided. The plurality of connecting portions 66 are arranged at intervals in the circumferential direction.
　図２に示すように、カバー６０の内部空間５９（以下「発電機室５９」という。）には、ロータ４０及びステータ５０が収容されている。カバー６０は、ステータ５０を支持する基部６１と、ロータ４０に対して径方向外側に設けられた外筒部６２と、ステータ５０に対して軸方向外側に設けられた側壁部６３と、を備える。例えば、基部６１、外筒部６２及び側壁部６３は、同一の部材で一体に形成されている。 As shown in FIG. 2, the rotor 40 and the stator 50 are accommodated in the internal space 59 (hereinafter referred to as "generator chamber 59") of the cover 60. The cover 60 includes a base portion 61 that supports the stator 50 , an outer cylindrical portion 62 that is provided radially outwardly of the rotor 40 , and a side wall portion 63 that is provided axially outwardly of the stator 50 . . For example, the base portion 61, the outer cylinder portion 62, and the side wall portion 63 are integrally formed of the same member.
　基部６１は、軸線ＡＬと同軸の筒状に形成されている。基部６１は、ステータ本体５１を取り付け可能なステータ取付凹部６４を有する。ステータ取付凹部６４は、基部６１の外周側の軸方向内端面から軸方向外側に窪んでいる。ステータ本体５１の内周部は、ステータ本体５１を基部６１に連結するためのボルト６５が挿通される貫通孔５４を有する。貫通孔５４は、軸方向から見てステータ取付凹部６４と重なる位置に設けられている。例えば、ボルト６５を軸方向内方から貫通孔５４、ステータ取付凹部６４に挿通し、ボルト６５の雄ねじ部をステータ取付凹部６４の雌ねじ部に螺合する。これにより、ボルト６５を介してステータ本体５１を基部６１に締結することができる。 The base 61 is formed in a cylindrical shape coaxial with the axis AL. The base 61 has a stator mounting recess 64 to which the stator main body 51 can be mounted. The stator mounting recess 64 is recessed axially outward from the axially inner end surface of the base portion 61 on the outer peripheral side. The inner peripheral portion of the stator body 51 has a through hole 54 through which a bolt 65 for connecting the stator body 51 to the base portion 61 is inserted. The through hole 54 is provided at a position overlapping the stator mounting recess 64 when viewed in the axial direction. For example, the bolt 65 is inserted axially inwardly through the through hole 54 and the stator mounting recess 64 , and the male threaded portion of the bolt 65 is screwed into the female threaded portion of the stator mounting recess 64 . Thereby, the stator main body 51 can be fastened to the base portion 61 via the bolts 65 .
　外筒部６２は、基部６１よりも大きい筒状に形成されている。外筒部６２は、軸方向内側に向かうに従って徐々に拡径している。外筒部６２の軸方向内端部には、複数の連結部６６（図３参照）が設けられている。外筒部６２の軸方向内端部は、複数の連結部６６を介して、複数のボルト（不図示）によりクランクケース１３に締結されている。 The outer cylindrical portion 62 is formed in a cylindrical shape that is larger than the base portion 61 . The outer cylindrical portion 62 gradually expands in diameter toward the inner side in the axial direction. A plurality of connecting portions 66 (see FIG. 3) are provided at the axially inner end portion of the outer cylindrical portion 62 . An axially inner end portion of the outer cylindrical portion 62 is fastened to the crankcase 13 with a plurality of bolts (not shown) via a plurality of connecting portions 66 .
　側壁部６３は、軸線ＡＬと同軸の環状に形成されている。側壁部６３は、基部６１の軸方向外端部と外筒部６２の軸方向外端部とを連結している。側壁部６３は、マグネット４２に向けてオイル（流体）を噴射する第一噴射孔７１と、コイル５２及び底部４４の少なくとも一方に向けてオイルを噴射する第二噴射孔７２と、を有する。第一噴射孔７１及び第二噴射孔７２は、互いに異なる位置に配置されている。例えば、第一噴射孔７１及び第二噴射孔７２は、互いに同じ孔径を有する。なお、第一噴射孔７１及び第二噴射孔７２は、互いに異なる孔径を有していてもよい。 The side wall portion 63 is formed in an annular shape coaxial with the axis AL. The side wall portion 63 connects the axially outer end portion of the base portion 61 and the axially outer end portion of the outer cylinder portion 62 . The side wall portion 63 has a first injection hole 71 for injecting oil (fluid) toward the magnet 42 and a second injection hole 72 for injecting oil toward at least one of the coil 52 and the bottom portion 44 . The first injection hole 71 and the second injection hole 72 are arranged at different positions. For example, the first injection hole 71 and the second injection hole 72 have the same hole diameter. Note that the first injection hole 71 and the second injection hole 72 may have hole diameters different from each other.
＜各噴射孔の配置＞
　図３に示すように、第一噴射孔７１は、複数（例えば本実施形態では３個）設けられている。複数の第一噴射孔７１は、周方向において互いに間隔をあけて配置されている。
　第二噴射孔７２は、第一噴射孔７１とは別に設けられている。第二噴射孔７２は、複数（例えば本実施形態では９個）設けられている。複数の第二噴射孔７２は、周方向において互いに間隔をあけて配置されている。 <Arrangement of each injection hole>
As shown in FIG. 3, a plurality of (for example, three in this embodiment) first injection holes 71 are provided. The plurality of first injection holes 71 are arranged at intervals in the circumferential direction.
The second injection hole 72 is provided separately from the first injection hole 71 . A plurality of second injection holes 72 (for example, nine in this embodiment) are provided. The plurality of second injection holes 72 are arranged at intervals in the circumferential direction.
　第一噴射孔７１は、第二噴射孔７２よりも径方向外側に配置されている。第一噴射孔７１は、周方向において隣り合う２つの第二噴射孔７２の間に配置されている。
　上述の通り、軸線ＡＬは車幅方向に沿うクランクシャフト１２（図２参照）の中心軸線である。軸線ＡＬは、車両が直立している状態（例えば、車両がバンクする前の状態）において、水平に沿って配置される。図３の例では、軸線ＡＬが水平に沿って配置されている状態を示す。 The first injection hole 71 is arranged radially outside the second injection hole 72 . The first injection hole 71 is arranged between two second injection holes 72 adjacent in the circumferential direction.
As described above, the axis AL is the central axis of the crankshaft 12 (see FIG. 2) along the vehicle width direction. Axis AL is arranged horizontally when the vehicle is upright (for example, before the vehicle is banked). The example of FIG. 3 shows a state in which the axis AL is arranged horizontally.
　第一噴射孔７１は、軸線ＡＬよりも鉛直上方に配置されている。図３において、軸線ＡＬを通る水平線ＨＬを設定する。本実施形態では、第一噴射孔７１は、水平線ＨＬよりも鉛直上方にのみ配置されている。すなわち、第一噴射孔７１は、水平線ＨＬよりも鉛直下方には配置されていない。 The first injection hole 71 is arranged vertically above the axis AL. In FIG. 3, a horizontal line HL passing through the axis AL is set. In this embodiment, the first injection holes 71 are arranged only vertically above the horizontal line HL. That is, the first injection holes 71 are not arranged vertically below the horizontal line HL.
　図３において、軸線ＡＬを通る鉛直線ＶＬ、ロータ４０の回転方向Ｒをそれぞれ設定する。第一噴射孔７１は、鉛直線ＶＬよりもロータ４０の回転方向Ｒ下流側（紙面右側）に配置されている。ここで、軸方向から見て、軸線ＡＬを通る鉛直線ＶＬにより二分された左側を左側領域Ｔ１とし、軸線ＡＬを通る鉛直線ＶＬにより二分された右側を右側領域Ｔ２とする。第一噴射孔７１は、軸方向から見て、ロータ４０が左回転するときは左側領域Ｔ１に配置され、ロータ４０が右回転するときは右側領域Ｔ２に配置されている。図３の例では、ロータ４０が軸方向から見て右回転しているため、第一噴射孔７１は軸方向から見て右側領域Ｔ２に配置されている。図３の例では、第一噴射孔７１は、鉛直線ＶＬよりもロータ４０の回転方向Ｒ下流側（右側領域Ｔ２）にのみ配置されている。すなわち、第一噴射孔７１は、鉛直線ＶＬよりもロータ４０の回転方向Ｒ上流側（左側領域Ｔ１）には配置されていない。 In FIG. 3, a vertical line VL passing through the axis AL and a rotational direction R of the rotor 40 are set. The first injection hole 71 is arranged downstream of the vertical line VL in the rotational direction R of the rotor 40 (right side of the drawing). Here, when viewed from the axial direction, the left side bisected by the vertical line VL passing through the axis AL is defined as a left side area T1, and the right side bisected by the vertical line VL passing through the axis AL is defined as a right side area T2. The first injection hole 71 is arranged in the left area T1 when the rotor 40 rotates to the left, and is arranged in the right area T2 when the rotor 40 rotates to the right, as viewed in the axial direction. In the example of FIG. 3, since the rotor 40 rotates to the right when viewed in the axial direction, the first injection holes 71 are arranged in the right region T2 when viewed in the axial direction. In the example of FIG. 3, the first injection holes 71 are arranged only downstream of the vertical line VL in the rotational direction R of the rotor 40 (right side region T2). That is, the first injection hole 71 is not arranged upstream of the vertical line VL in the rotational direction R of the rotor 40 (left region T1).
　図２に示すように、第一噴射孔７１は、ロータ本体４１の径方向外側を指向している。第一噴射孔７１は、ロータ本体４１の軸方向内側に向かうに従って径方向外側に位置するように傾斜して延びている。本実施形態では、第一噴射孔７１は、直線状に延びている。第一噴射孔７１の中心線は、マグネット４２の軸方向中央部と重なる位置に配置されている。すなわち、マグネット４２は、第一噴射孔７１の延長線上に配置されている。一方、第一噴射孔７１の中心線は、コイル５２とは重ならない位置に配置されている。すなわち、コイル５２は、第一噴射孔７１の延長線を避けて配置されている。 As shown in FIG. 2 , the first injection holes 71 are oriented radially outward of the rotor body 41 . The first injection hole 71 extends along an axially inner side of the rotor body 41 so as to be located radially outward. In this embodiment, the first injection hole 71 extends linearly. The center line of the first injection hole 71 is arranged at a position overlapping the axially central portion of the magnet 42 . That is, the magnet 42 is arranged on the extension line of the first injection hole 71 . On the other hand, the center line of the first injection hole 71 is arranged at a position not overlapping the coil 52 . That is, the coil 52 is arranged avoiding the extension line of the first injection hole 71 .
　第一噴射孔７１及び第二噴射孔７２は、不図示の通路を通じてクランクケース１３側のメイン通路に連通している。メイン通路には、不図示のオイルポンプからオイルが供給される。
　例えば、エンジン１１（図１参照）の動作により、クランクシャフト１２が回転すると、ＡＣＧスタータモータ３９のロータ４０がクランクシャフト１２の回転に伴って回転する。すると、ロータ４０に設けられたマグネット４２と、カバー６０に固定されたステータ５０のコイル５２とが相対回転して発電が行われる。この発電によって、コイル５２及びマグネット４２が発熱する。 The first injection hole 71 and the second injection hole 72 communicate with the main passage on the crankcase 13 side through passages (not shown). Oil is supplied to the main passage from an oil pump (not shown).
For example, when the crankshaft 12 rotates due to the operation of the engine 11 (see FIG. 1), the rotor 40 of the ACG starter motor 39 rotates as the crankshaft 12 rotates. Then, the magnet 42 provided on the rotor 40 and the coil 52 of the stator 50 fixed to the cover 60 rotate relative to each other to generate power. Due to this power generation, the coil 52 and the magnet 42 generate heat.
　一方、エンジン１１の動作により、不図示のオイルポンプが駆動されてメイン通路にオイルが供給される。このオイルは、不図示の通路を通じてカバー６０に設けられた第一噴射孔７１及び第二噴射孔７２から発電機室５９内に噴射される。
　第一噴射孔７１はマグネット４２に指向されているため、第一噴射孔７１から噴射されたオイルはマグネット４２に衝突する。例えば、第一噴射孔７１から噴射されたオイルは、図２中矢印Ｊ１に示す軌跡でマグネット４２に降りかけられる。 On the other hand, the operation of the engine 11 drives an oil pump (not shown) to supply oil to the main passage. This oil is injected into the generator chamber 59 from a first injection hole 71 and a second injection hole 72 provided in the cover 60 through passages (not shown).
Since the first injection hole 71 is directed toward the magnet 42 , the oil injected from the first injection hole 71 collides with the magnet 42 . For example, the oil injected from the first injection hole 71 falls on the magnet 42 along the trajectory indicated by the arrow J1 in FIG.
　第二噴射孔７２はコイル５２及び底部４４の少なくとも一方に指向されているため、第二噴射孔７２から噴射されたオイルはコイル５２及び底部４４の少なくとも一方に衝突する。例えば、第二噴射孔７２から噴射されたオイルは、図２中矢印Ｊ２に示す軌跡でコイル５２に降りかけられる。例えば、第二噴射孔７２から噴射されたオイルは、図２中矢印Ｊ３に示す軌跡でロータ４０の底部４４に降りかけられる。 Since the second injection hole 72 is directed to at least one of the coil 52 and the bottom 44 , the oil injected from the second injection hole 72 collides with at least one of the coil 52 and the bottom 44 . For example, the oil injected from the second injection hole 72 falls on the coil 52 along the trajectory indicated by the arrow J2 in FIG. For example, the oil injected from the second injection hole 72 falls on the bottom portion 44 of the rotor 40 along the trajectory indicated by the arrow J3 in FIG.
　第一噴射孔７１及び第二噴射孔７２から発電機室５９内に噴射されたオイルは、ロータ４０の回転による遠心力で外周方向に飛散しつつコイル５２及びマグネット４２に向けて跳ね返される。このようにして、各噴射孔７１，７２から発電機室５９内に噴射されたオイルは、ロータ４０及びステータ５０等、ＡＣＧスタータモータ３９の構成要素に行き渡り、各構成要素を冷却する。各構成要素の冷却を終えて発電機室５９の底部（鉛直下方の部分）に溜まったオイルは、不図示の戻し通路を通ってクランクケース１３に戻される。 The oil injected into the generator chamber 59 from the first injection hole 71 and the second injection hole 72 is scattered in the outer peripheral direction by centrifugal force due to the rotation of the rotor 40 and bounces back toward the coil 52 and the magnet 42 . In this way, the oil injected into the generator chamber 59 from the injection holes 71 and 72 spreads over the constituent elements of the ACG starter motor 39 such as the rotor 40 and stator 50 to cool them. The oil accumulated in the bottom (vertical lower portion) of the generator chamber 59 after cooling of each component is returned to the crankcase 13 through a return passage (not shown).
＜作用効果＞
　以上説明したように、上記実施形態のＡＣＧスタータモータ３９（以下「回転電機３９」ともいう。）は、アウターロータ形式である。回転電機３９は、筒状のロータ本体４１と、ロータ本体４１の内周に設けられたマグネット４２と、を有し、ロータ本体４１の軸線ＡＬを中心に回転可能なロータ４０と、ロータ本体４１に対して径方向内側に設けられたステータ本体５１と、ステータ本体５１に巻き掛けられたコイル５２と、を有するステータ５０と、軸線ＡＬに沿う軸方向の外側からステータ５０を覆うカバー６０と、を備える。カバー６０は、マグネット４２に向けてオイルを噴射する第一噴射孔７１を有する。
　この構成によれば、第一噴射孔７１によりロータ４０のマグネット４２に向けてオイルが噴射されるため、発熱部材であるロータ４０のマグネット４２を冷却することができる。 <Effect>
As described above, the ACG starter motor 39 (hereinafter also referred to as "rotating electric machine 39") of the above embodiment is of the outer rotor type. The rotary electric machine 39 has a cylindrical rotor body 41 and magnets 42 provided on the inner circumference of the rotor body 41. The rotor 40 is rotatable about the axis AL of the rotor body 41, and the rotor body 41 A stator 50 having a stator body 51 provided radially inward with respect to the stator body 50 and a coil 52 wound around the stator body 51, a cover 60 covering the stator 50 from the outside in the axial direction along the axis AL, Prepare. The cover 60 has a first injection hole 71 for injecting oil toward the magnet 42 .
According to this configuration, since the oil is injected toward the magnet 42 of the rotor 40 through the first injection hole 71, the magnet 42 of the rotor 40, which is a heat generating member, can be cooled.
　上記実施形態では、ロータ本体４１は、軸線ＡＬを中心とする円筒状の円筒部４３と、円筒部４３と連続するとともに、軸線ＡＬを有するクランクシャフト１２に固定された底部４４と、を備える。マグネット４２は、円筒部４３の内周に設けられている。ステータ本体５１は、円筒部４３よりも径方向内側に設けられている。カバー６０は、第一噴射孔７１とは別に、コイル５２及び底部４４の少なくとも一方に向けてオイルを噴射する第二噴射孔７２を有することで、以下の効果を奏する。
　第二噴射孔７２によりステータ５０のコイル５２及びロータ本体４１の底部４４の少なくとも一方に向けてオイルが噴射されるため、ステータ５０のコイル５２を直に冷却したり底部４４からの跳ね返りで冷却したりすることができる。したがって、発熱部材であるロータ４０のマグネット４２とステータ５０のコイル５２とを冷却することができる。
　例えば、大型の二輪車等の大型車両へ発電機を適用した場合には、発電機の大型化や大電力の使用が必要となるため、ロータ４０のマグネット４２及びステータ５０のコイル５２の両方を冷却する実益が大きい。 In the above embodiment, the rotor body 41 includes a cylindrical portion 43 centered on the axis AL, and a bottom portion 44 continuous with the cylindrical portion 43 and fixed to the crankshaft 12 having the axis AL. The magnet 42 is provided on the inner circumference of the cylindrical portion 43 . The stator main body 51 is provided radially inward of the cylindrical portion 43 . The cover 60 has the second injection hole 72 for injecting the oil toward at least one of the coil 52 and the bottom portion 44 in addition to the first injection hole 71, thereby providing the following effects.
Since the oil is injected toward at least one of the coils 52 of the stator 50 and the bottom portion 44 of the rotor body 41 through the second injection holes 72, the coils 52 of the stator 50 are cooled directly or by rebounding from the bottom portion 44. can be Therefore, the magnet 42 of the rotor 40 and the coil 52 of the stator 50, which are heat generating members, can be cooled.
For example, when a generator is applied to a large vehicle such as a large two-wheeled vehicle, it is necessary to increase the size of the generator and use a large amount of power. The profit to do is large.
　上記実施形態では、第一噴射孔７１は、第二噴射孔７２よりも径方向外側に配置されていることで、以下の効果を奏する。
　回転電機３９がアウターロータ形式である場合は、マグネット４２はコイル５２よりも径方向外側に配置されているため、第一噴射孔７１及び第二噴射孔７２をそれぞれ好適に配置することができる。したがって、アウターロータ形式の回転電機において第一噴射孔７１が第二噴射孔７２よりも径方向内側に配置されている場合と比較して、ロータ４０のマグネット４２及びステータ５０のコイル５２の両方を効果的に冷却することができる。 In the above-described embodiment, the first injection holes 71 are arranged radially outward of the second injection holes 72, thereby providing the following effects.
When the rotary electric machine 39 is of the outer rotor type, the magnets 42 are arranged radially outside the coils 52, so the first injection holes 71 and the second injection holes 72 can be preferably arranged. Therefore, both the magnet 42 of the rotor 40 and the coil 52 of the stator 50 are reduced compared to the case where the first injection holes 71 are arranged radially inside the second injection holes 72 in the outer rotor type rotary electric machine. can be effectively cooled.
　上記実施形態では、軸線ＡＬは、水平に沿って配置され、第一噴射孔７１は、軸線ＡＬよりも鉛直上方に配置されていることで、以下の効果を奏する。
　例えば、軸線ＡＬが水平に沿って配置され、軸線ＡＬよりも鉛直下方にオイルが溜まっている場合、軸線ＡＬよりも鉛直下方の部分は冷却の必要性が乏しい。一方、軸線ＡＬよりも鉛直上方の部分は、熱がこもりやすく、冷却の必要性が高い。本実施形態によれば、第一噴射孔７１により、軸線ＡＬよりも鉛直上方の部分を重点的に冷却することができるため、より効果的な冷却を行うことができる。 In the above-described embodiment, the axis AL is arranged horizontally, and the first injection holes 71 are arranged vertically above the axis AL, thereby providing the following effects.
For example, when the axis AL is arranged horizontally and the oil is accumulated vertically below the axis AL, the portion vertically below the axis AL has little need for cooling. On the other hand, the portion vertically above the axis AL tends to retain heat and requires cooling. According to the present embodiment, since the first injection holes 71 can intensively cool the portion vertically above the axis AL, more effective cooling can be performed.
　上記実施形態では、軸線ＡＬは、水平に沿って配置され、軸方向から見て、軸線ＡＬを通る鉛直線ＶＬにより二分された左側を左側領域Ｔ１とし、前記鉛直線ＶＬにより二分された右側を右側領域Ｔ２としたとき、第一噴射孔７１は、軸方向から見て、ロータ４０が左回転するときは左側領域Ｔ１に配置され、ロータ４０が右回転するときは右側領域Ｔ２に配置されていることで、以下の効果を奏する。
　例えば、軸線ＡＬが水平に沿って配置され、軸線ＡＬよりも鉛直下方にオイルが溜まっている場合、オイルはロータ４０の回転によりかき回される。ロータ４０の回転によるオイルの冷却効果は、軸線ＡＬを通る鉛直線ＶＬよりもロータ４０の回転方向Ｒ下流側の部分ではロータ４０の回転方向Ｒ上流側の部分よりも得にくい。本実施形態によれば、第一噴射孔７１により、軸線ＡＬを通る鉛直線ＶＬよりもロータ４０の回転方向Ｒ下流側の部分を重点的に冷却することができるため、より効果的な冷却を行うことができる。 In the above-described embodiment, the axis AL is arranged horizontally, and the left side bisected by the vertical line VL passing through the axis AL is defined as the left region T1, and the right side bisected by the vertical line VL is defined as the left region T1. Assuming the right region T2, the first injection hole 71 is arranged in the left region T1 when the rotor 40 rotates to the left, and is arranged in the right region T2 when the rotor 40 rotates to the right, as viewed from the axial direction. By being there, the following effects are achieved.
For example, when the axis AL is arranged horizontally and the oil is accumulated vertically below the axis AL, the oil is stirred by the rotation of the rotor 40 . The cooling effect of the oil due to the rotation of the rotor 40 is more difficult to obtain at a portion downstream in the rotational direction R of the vertical line VL passing through the axis AL than at a portion upstream in the rotational direction R of the rotor 40 . According to the present embodiment, since the first injection holes 71 can intensively cool the portion downstream of the vertical line VL passing through the axis AL in the rotation direction R of the rotor 40, more effective cooling can be achieved. It can be carried out.
　上記実施形態では、マグネット４２は、ロータ本体４１の内周に設けられ、ステータ本体５１は、ロータ本体４１よりも径方向内側に設けられ、第一噴射孔７１は、ロータ本体４１の径方向外側に指向していることで、以下の効果を奏する。
　回転電機３９がアウターロータ形式である場合は、マグネット４２はコイル５２よりも径方向外側に配置されているため、第一噴射孔７１を好適に配置することができる。したがって、アウターロータ形式の回転電機において第一噴射孔７１がロータ本体４１の径方向内側に指向している場合と比較して、ロータ４０のマグネット４２を効果的に冷却することができる。 In the above embodiment, the magnet 42 is provided on the inner circumference of the rotor main body 41 , the stator main body 51 is provided radially inward of the rotor main body 41 , and the first injection holes 71 are provided radially outward of the rotor main body 41 . The following effects are produced by being oriented to.
When the rotary electric machine 39 is of the outer rotor type, the magnets 42 are arranged radially outside of the coils 52, so the first injection holes 71 can be preferably arranged. Therefore, the magnets 42 of the rotor 40 can be effectively cooled compared to the case where the first injection holes 71 are oriented radially inward of the rotor main body 41 in the outer rotor type rotary electric machine.
　上記実施形態では、マグネット４２は、第一噴射孔７１の延長線上に配置され、コイル５２は、第一噴射孔７１の延長線を避けて配置されていることで、以下の効果を奏する。
　コイル５２が第一噴射孔７１の延長線上に配置されている場合と比較して、第一噴射孔７１から噴射されたオイルは、コイル５２を避けてマグネット４２に直に当たりやすいため、ロータ４０のマグネット４２を効果的に冷却することができる。 In the above-described embodiment, the magnet 42 is arranged on the extension line of the first injection hole 71, and the coil 52 is arranged to avoid the extension line of the first injection hole 71, thereby providing the following effects.
Compared to the case where the coil 52 is arranged on the extension line of the first injection hole 71 , the oil injected from the first injection hole 71 tends to avoid the coil 52 and hit the magnet 42 directly. The magnet 42 can be effectively cooled.
　上記実施形態のパワーユニット１０は、上記の回転電機３９を備える。
　この構成によれば、発熱部材であるロータ４０のマグネット４２を冷却することができるパワーユニット１０を提供することができる。 The power unit 10 of the above-described embodiment includes the rotating electric machine 39 described above.
According to this configuration, it is possible to provide the power unit 10 capable of cooling the magnet 42 of the rotor 40, which is a heat generating member.
　上記実施形態では、回転電機３９は、エンジン１１の始動が可能であることで、以下の効果を奏する。
　エンジン１１の始動が可能な回転電機３９において、ロータ４０のマグネット４２を冷却することができる。 In the above-described embodiment, the rotary electric machine 39 can start the engine 11, thereby providing the following effects.
The magnet 42 of the rotor 40 can be cooled in the rotating electrical machine 39 capable of starting the engine 11 .
＜変形例＞
　なお、上記実施形態では、第一噴射孔がマグネットに向けてオイルを噴射する例を挙げて説明したが、これに限らない。例えば、第一噴射孔は、マグネットに向けてオイル以外の液体を噴射してもよいし、気体を噴射してもよい。例えば、第一噴射孔がマグネットに向けて噴射する流体の態様は、要求仕様に応じて変更することができる。 <Modification>
In addition, in the above-described embodiment, an example in which the first injection hole injects oil toward the magnet has been described, but the present invention is not limited to this. For example, the first injection hole may inject liquid other than oil toward the magnet, or may inject gas. For example, the mode of the fluid that the first injection hole injects toward the magnet can be changed according to the required specifications.
　上記実施形態では、回転電機がアウターロータ形式である例を挙げて説明したが、これに限らない。例えば、例えば、回転電機は、インナーロータ形式であってもよい。例えば、インナーロータ形式の回転電機において、ロータは、筒状のロータ本体と、ロータ本体の外周に設けられたマグネットと、を有する。一方、ステータは、ロータ本体に対して径方向外側に設けられたステータ本体と、ステータ本体に巻き掛けられたコイルと、を有する。すなわち、回転電機は、筒状のロータ本体と、ロータ本体の内周及び外周のうちいずれか一方に設けられたマグネットと、を有し、ロータ本体の軸線を中心に回転可能なロータと、ロータ本体に対して径方向内側及び径方向外側のうちいずれか一方に設けられたステータ本体と、ステータ本体に巻き掛けられたコイルと、を有するステータと、を備えていればよい。例えば、回転電機の態様は、要求仕様に応じて変更することができる。 In the above embodiment, an example in which the rotating electrical machine is of the outer rotor type has been described, but the present invention is not limited to this. For example, the rotating electrical machine may be of the inner rotor type. For example, in an inner rotor type rotary electric machine, the rotor has a tubular rotor body and magnets provided on the outer periphery of the rotor body. On the other hand, the stator has a stator body provided radially outside the rotor body, and a coil wound around the stator body. That is, the rotary electric machine has a cylindrical rotor body and magnets provided on either one of the inner circumference and the outer circumference of the rotor body, the rotor being rotatable about the axis of the rotor body, and the rotor A stator having a stator main body provided on either one of the radially inner side and the radially outer side with respect to the main body and a coil wound around the stator main body may be provided. For example, the aspect of the rotating electric machine can be changed according to the required specifications.
　上記実施形態では、カバーは、第一噴射孔とは別に、コイル及び底部の少なくとも一方に向けてオイルを噴射する第二噴射孔を有する例を挙げて説明したが、これに限らない。例えば、カバーは、第二噴射孔を有しなくてもよい。例えば、カバーは、第一噴射孔のみ有していてもよい。例えば、噴射孔の設置態様は、要求仕様に応じて変更することができる。 In the above embodiment, the cover has a second injection hole for injecting oil toward at least one of the coil and the bottom, in addition to the first injection hole. However, the cover is not limited to this. For example, the cover may not have the second injection holes. For example, the cover may have only the first injection holes. For example, the installation mode of the injection holes can be changed according to the required specifications.
　上記実施形態では、第一噴射孔が第二噴射孔よりも径方向外側に配置されている例を挙げて説明したが、これに限らない。例えば、第一噴射孔が第二噴射孔よりも径方向内側に配置されていてもよい。例えば、回転電機がアウターロータ形式である場合は、マグネットはコイルよりも径方向内側に配置されているため、第一噴射孔が第二噴射孔よりも径方向内側に配置されることで、第一噴射孔及び第二噴射孔をそれぞれ好適に配置することができる。例えば、各噴射孔の配置態様は、要求仕様に応じて変更することができる。 In the above embodiment, an example in which the first injection holes are arranged radially outside of the second injection holes has been described, but the present invention is not limited to this. For example, the first injection hole may be arranged radially inside the second injection hole. For example, when the rotary electric machine is of the outer rotor type, the magnet is arranged radially inward of the coil. The one injection hole and the second injection hole can be arranged appropriately. For example, the arrangement of each injection hole can be changed according to required specifications.
　上記実施形態では、軸線は水平に沿って配置され、第一噴射孔は軸線よりも鉛直上方に配置されている例を挙げて説明したが、これに限らない。例えば、第一噴射孔は、軸線よりも鉛直下方に配置されていてもよい。例えば、軸線に対する第一噴射孔の配置態様は、要求仕様に応じて変更することができる。 In the above embodiment, an example in which the axis is arranged horizontally and the first injection holes are arranged vertically above the axis has been described, but the present invention is not limited to this. For example, the first injection hole may be arranged vertically below the axis. For example, the arrangement of the first injection holes with respect to the axis can be changed according to the required specifications.
　上記実施形態では、軸線は水平に沿って配置され、軸方向から見て、軸線を通る鉛直線により二分された左側を左側領域とし、前記鉛直線により二分された右側を右側領域としたとき、第一噴射孔は、軸方向から見て、ロータが左回転するときは左側領域に配置され、ロータが右回転するときは右側領域に配置されている例を挙げて説明したが、これに限らない。例えば、第一噴射孔は、軸方向から見て、ロータが左回転するときは右側領域に配置され、ロータが右回転するときは左側領域に配置されていてもよい。例えば、軸線を通る鉛直線に対する第一噴射孔の配置態様は、要求仕様に応じて変更することができる。 In the above embodiment, the axis is arranged horizontally, and when viewed from the axial direction, the left side bisected by the vertical line passing through the axis is the left area, and the right side bisected by the vertical line is the right area. Although the first injection hole is arranged in the left area when the rotor rotates to the left and is arranged in the right area when the rotor rotates to the right when viewed from the axial direction, the present invention is not limited to this. do not have. For example, when viewed from the axial direction, the first injection hole may be arranged in the right area when the rotor rotates to the left, and may be arranged in the left area when the rotor rotates to the right. For example, the arrangement of the first injection holes with respect to the vertical line passing through the axis can be changed according to the required specifications.
　上記実施形態では、第一噴射孔がロータ本体の径方向外側に指向している例を挙げて説明したが、これに限らない。例えば、第一噴射孔は、ロータ本体の軸方向に指向していてもよいし、ロータ本体の径方向内側に指向していてもよい。例えば、回転電機がインナーロータ形式である場合は、マグネットはコイルよりも径方向内側に配置されているため、第一噴射孔がロータ本体の径方向内側に指向していることで、第一噴射孔を好適に配置することができる。例えば、第一噴射孔の態様は、要求仕様に応じて変更することができる。 In the above embodiment, an example in which the first injection holes are oriented radially outward of the rotor body has been described, but this is not the only option. For example, the first injection holes may be oriented in the axial direction of the rotor body, or may be oriented radially inward of the rotor body. For example, if the rotating electrical machine is of the inner rotor type, the magnets are arranged radially inward of the coils. The holes can be conveniently arranged. For example, the aspect of the first injection hole can be changed according to the required specifications.
　上記実施形態では、マグネットは第一噴射孔の延長線上に配置され、コイルは第一噴射孔の延長線を避けて配置されている例を挙げて説明したが、これに限らない。例えば、コイルが第一噴射孔の延長線上に配置されていてもよい。例えば、第一噴射孔の延長線に対するマグネット及びコイルの配置態様は、要求仕様に応じて変更することができる。 In the above embodiment, the magnet is arranged on the extension line of the first injection hole, and the coil is arranged to avoid the extension line of the first injection hole. For example, the coil may be arranged on the extension line of the first injection hole. For example, the arrangement of the magnets and coils with respect to the extension of the first injection holes can be changed according to the required specifications.
　上記実施形態では、回転電機の一例としてエンジンの始動が可能なＡＣＧスタータモータを例に挙げて説明したが、これに限らない。例えば、回転電機は、ＡＣＧスタータモータ以外の他のモータ（始動機、発電機）であってもよい。例えば、回転電機の態様は、要求仕様に応じて変更することができる。 In the above embodiment, an ACG starter motor capable of starting an engine has been described as an example of a rotating electric machine, but it is not limited to this. For example, the rotating electric machine may be a motor (starter, generator) other than the ACG starter motor. For example, the aspect of the rotating electric machine can be changed according to the required specifications.
　上記実施形態では、エンジンの一例としてクランクシャフトを車幅方向に沿わせた単気筒エンジンを例に挙げて説明したが、これに限らない。例えば、エンジンは、多気筒エンジンであってもよい。例えば、エンジンの態様は、要求仕様に応じて変更することができる。 In the above embodiment, a single-cylinder engine in which the crankshaft extends along the vehicle width direction has been described as an example of the engine, but the invention is not limited to this. For example, the engine may be a multi-cylinder engine. For example, aspects of the engine can be changed according to required specifications.
　上記実施形態では、鞍乗型車両に回転電機を適用した例に挙げて説明したが、これに限らない。例えば、回転電機は、鞍乗型車両以外の他の構造物（例えば、作業機械、生産設備等）に適用してもよい。 In the above embodiment, an example in which a rotating electrical machine is applied to a straddle-type vehicle has been described, but the present invention is not limited to this. For example, the rotating electric machine may be applied to structures other than straddle-type vehicles (for example, working machines, production facilities, etc.).
　上記実施形態では、鞍乗型車両の一例として車体側にエンジンを搭載した自動二輪車を例に挙げて説明したが、これに限らない。例えば、鞍乗型車両は、ユニットスイング式の自動二輪車であってもよい。例えば、鞍乗型車両の態様は、要求仕様に応じて変更することができる。 In the above embodiment, a motorcycle having an engine mounted on the vehicle body side has been described as an example of a straddle-type vehicle, but the invention is not limited to this. For example, the straddle-type vehicle may be a unit-swing type motorcycle. For example, the aspect of the straddle-type vehicle can be changed according to the required specifications.
　なお、本発明は上記実施形態に限られるものではなく、例えば、鞍乗型車両には、運転者が車体を跨いで乗車する車両全般が含まれ、自動二輪車（原動機付自転車及びスクータ型車両を含む）のみならず、三輪（前一輪且つ後二輪の他に、前二輪且つ後一輪の車両も含む）の車両も含まれる。また、本発明は、自動二輪車のみならず、自動車等の四輪の車両にも適用可能である。
　そして、上記実施形態における構成は本発明の一例であり、実施形態の構成要素を周知の構成要素に置き換える等、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 The present invention is not limited to the above-described embodiments. For example, straddle-type vehicles include general vehicles in which a driver straddles the vehicle body, motorcycles (including motorized bicycles and scooter-type vehicles). ), but also three-wheeled vehicles (including vehicles with two front wheels and one rear wheel, as well as vehicles with one front wheel and two rear wheels). Moreover, the present invention is applicable not only to motorcycles but also to four-wheeled vehicles such as automobiles.
The configuration in the above embodiment is an example of the present invention, and various modifications, such as replacing the constituent elements of the embodiment with known constituent elements, are possible without departing from the gist of the present invention.
　１０　パワーユニット
　１１　エンジン（内燃機関）
　１２　クランクシャフト（シャフト）
　３９　ＡＣＧスタータモータ（回転電機）
　４０　ロータ
　４１　ロータ本体
　４２　マグネット
　４３　円筒部
　４４　底部
　５０　ステータ
　５１　ステータ本体
　５２　コイル
　６０　カバー
　７１　第一噴射孔
　７２　第二噴射孔
　ＡＬ　軸線
　Ｒ　ロータの回転方向
　Ｔ１　左側領域
　Ｔ２　右側領域
　ＶＬ　鉛直線 10 power unit 11 engine (internal combustion engine)
12 crankshaft (shaft)
39 ACG starter motor (rotating electric machine)
40 Rotor 41 Rotor body 42 Magnet 43 Cylindrical part 44 Bottom part 50 Stator 51 Stator body 52 Coil 60 Cover 71 First injection hole 72 Second injection hole AL Axis line R Rotation direction of rotor T1 Left area T2 Right area VL Vertical line

Claims (9)

  1. 　筒状のロータ本体（４１）と、前記ロータ本体（４１）の内周及び外周のうちいずれか一方に設けられたマグネット（４２）と、を有し、前記ロータ本体（４１）の軸線（ＡＬ）を中心に回転可能なロータ（４０）と、
    　前記ロータ本体（４１）に対して径方向内側及び径方向外側のうちいずれか一方に設けられたステータ本体（５１）と、前記ステータ本体（５１）に巻き掛けられたコイル（５２）と、を有するステータ（５０）と、
    　前記軸線（ＡＬ）に沿う軸方向の外側から前記ステータ（５０）を覆うカバー（６０）と、を備え、
    　前記カバー（６０）は、前記マグネット（４２）に向けて流体を噴射する第一噴射孔（７１）を有することを特徴とする回転電機。     It has a cylindrical rotor body (41) and a magnet (42) provided on either one of the inner circumference and the outer circumference of the rotor body (41), and the axis (AL ), a rotor (40) rotatable about
    a stator body (51) provided on either one of a radially inner side and a radially outer side with respect to the rotor body (41); and a coil (52) wound around the stator body (51). a stator (50) having
    a cover (60) covering the stator (50) from the outside in the axial direction along the axis (AL);
    A rotary electric machine, wherein the cover (60) has a first injection hole (71) for injecting fluid toward the magnet (42).
  2. 　前記回転電機（３９）は、アウターロータ形式であり、
    　前記ロータ本体（４１）は、
    　　前記軸線（ＡＬ）を中心とする円筒状の円筒部（４３）と、
    　　前記円筒部（４３）と連続するとともに、前記軸線（ＡＬ）を有するシャフト（１２）に固定された底部（４４）と、を備え、
    　前記マグネット（４２）は、前記円筒部（４３）の内周に設けられ、
    　前記ステータ本体（５１）は、前記円筒部（４３）よりも径方向内側に設けられ、
    　前記カバー（６０）は、前記第一噴射孔（７１）とは別に、前記コイル（５２）及び前記底部（４４）の少なくとも一方に向けて流体を噴射する第二噴射孔（７２）を有することを特徴とする請求項１に記載の回転電機。     The rotating electric machine (39) is of an outer rotor type,
    The rotor body (41) is
    a cylindrical cylindrical portion (43) centered on the axis (AL);
    a bottom portion (44) contiguous with said cylindrical portion (43) and fixed to a shaft (12) having said axis (AL);
    The magnet (42) is provided on the inner periphery of the cylindrical portion (43),
    The stator main body (51) is provided radially inward of the cylindrical portion (43),
    The cover (60) has a second injection hole (72) for injecting fluid toward at least one of the coil (52) and the bottom (44) separately from the first injection hole (71). The rotary electric machine according to claim 1, characterized by:
  3. 　前記第一噴射孔（７１）は、前記第二噴射孔（７２）よりも径方向外側に配置されていることを特徴とする請求項２に記載の回転電機。 The rotating electric machine according to claim 2, wherein the first injection hole (71) is arranged radially outside the second injection hole (72).
  4. 　前記軸線（ＡＬ）は、水平に沿って配置され、
    　前記第一噴射孔（７１）は、前記軸線（ＡＬ）よりも鉛直上方に配置されていることを特徴とする請求項１から３のいずれか一項に記載の回転電機。     the axis (AL) is arranged along the horizontal,
    The rotary electric machine according to any one of claims 1 to 3, wherein the first injection hole (71) is arranged vertically above the axis (AL).
  5. 　前記軸線（ＡＬ）は、水平に沿って配置され、
    　前記軸方向から見て、前記軸線（ＡＬ）を通る鉛直線（ＶＬ）により二分された左側を左側領域（Ｔ１）とし、前記鉛直線（ＶＬ）により二分された右側を右側領域（Ｔ２）としたとき、
    　前記第一噴射孔（７１）は、前記軸方向から見て、前記ロータ（４０）が左回転するときは前記左側領域（Ｔ１）に配置され、前記ロータ（４０）が右回転するときは前記右側領域（Ｔ２）に配置されていることを特徴とする請求項１から４のいずれか一項に記載の回転電機。     the axis (AL) is arranged along the horizontal,
    When viewed from the axial direction, the left side bisected by a vertical line (VL) passing through the axis (AL) is defined as a left side area (T1), and the right side bisected by the vertical line (VL) is defined as a right side area (T2). when
    The first injection hole (71) is arranged in the left region (T1) when the rotor (40) rotates to the left when viewed from the axial direction, and is arranged in the left region (T1) when the rotor (40) rotates to the right. The rotary electric machine according to any one of claims 1 to 4, wherein the rotary electric machine is arranged in the right region (T2).
  6. 　前記回転電機（３９）は、アウターロータ形式であり、
    　前記マグネット（４２）は、前記ロータ本体（４１）の内周に設けられ、
    　前記ステータ本体（５１）は、前記ロータ本体（４１）よりも径方向内側に設けられ、
    　前記第一噴射孔（７１）は、前記ロータ本体（４１）の径方向外側を指向していることを特徴とする請求項１から５のいずれか一項に記載の回転電機。     The rotating electric machine (39) is of an outer rotor type,
    The magnet (42) is provided on the inner circumference of the rotor body (41),
    The stator body (51) is provided radially inward of the rotor body (41),
    The rotary electric machine according to any one of claims 1 to 5, wherein the first injection holes (71) are oriented radially outward of the rotor body (41).
  7. 　前記マグネット（４２）は、前記第一噴射孔（７１）の延長線上に配置され、
    　前記コイル（５２）は、前記第一噴射孔（７１）の延長線を避けて配置されていることを特徴とする請求項６に記載の回転電機。     The magnet (42) is arranged on an extension line of the first injection hole (71),
    The rotary electric machine according to claim 6, wherein the coil (52) is arranged to avoid an extension line of the first injection hole (71).
  8. 　請求項１から７のいずれか一項に記載の回転電機（３９）を備えることを特徴とするパワーユニット。 A power unit comprising the rotating electric machine (39) according to any one of claims 1 to 7.
  9. 　前記回転電機（３９）は、内燃機関（１１）の始動が可能であることを特徴とする請求項８に記載のパワーユニット。 The power unit according to claim 8, wherein the rotating electric machine (39) is capable of starting an internal combustion engine (11).
PCT/JP2021/047934 2021-02-25 2021-12-23 Dyanamo-electric machine and power unit WO2022181028A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001258209A (en) * 2000-03-15 2001-09-21 Kawasaki Heavy Ind Ltd Cooling equipment of generator for engine
JP2019097241A (en) * 2017-11-20 2019-06-20 スズキ株式会社 Cooling structure of dynamo-electric generator
JP2019097240A (en) * 2017-11-20 2019-06-20 スズキ株式会社 Cooling structure of dynamo-electric generator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001258209A (en) * 2000-03-15 2001-09-21 Kawasaki Heavy Ind Ltd Cooling equipment of generator for engine
JP2019097241A (en) * 2017-11-20 2019-06-20 スズキ株式会社 Cooling structure of dynamo-electric generator
JP2019097240A (en) * 2017-11-20 2019-06-20 スズキ株式会社 Cooling structure of dynamo-electric generator

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