WO2023188295A1 - Véhicule - Google Patents

Véhicule Download PDF

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Publication number
WO2023188295A1
WO2023188295A1 PCT/JP2022/016593 JP2022016593W WO2023188295A1 WO 2023188295 A1 WO2023188295 A1 WO 2023188295A1 JP 2022016593 W JP2022016593 W JP 2022016593W WO 2023188295 A1 WO2023188295 A1 WO 2023188295A1
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WO
WIPO (PCT)
Prior art keywords
opening
wall
vehicle
vehicle according
stator
Prior art date
Application number
PCT/JP2022/016593
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English (en)
Japanese (ja)
Inventor
裕司 成田
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
Priority to PCT/JP2022/016593 priority Critical patent/WO2023188295A1/fr
Publication of WO2023188295A1 publication Critical patent/WO2023188295A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium

Definitions

  • the present invention relates to a vehicle.
  • Patent Document 1 a configuration for cooling an electric motor in a vehicle is known (for example, see Patent Document 1).
  • a flow path through which running air flows is formed between a casing of a motor and a housing that covers the casing, and a plurality of fins are arranged in the flow path to efficiently dissipate heat from the motor.
  • the vehicle includes a rotating electric machine including a rotor that rotates around a rotating shaft arranged substantially parallel to an axle, and a stator, an inner wall surrounding the outer periphery of the rotating electric machine, and a predetermined distance from the inner wall.
  • the vehicle is characterized in that the outer wall is provided with at least two openings, and at least one of the two openings is provided above the rotation axis.
  • FIG. 1 is a left side view of the saddle type vehicle according to the present embodiment.
  • FIG. 2 is a perspective view of the rear part of the swing arm seen from the rear left.
  • FIG. 3 is a sectional view of the motor mounting section.
  • FIG. 4 is a left side view of the swing arm showing the vicinity of the motor mounting portion.
  • FIG. 1 is a left side view of a saddle-ride type vehicle 10 according to the present embodiment.
  • the saddle-ride type vehicle 10 includes a body frame 11, an electric motor 13 that drives a rear wheel 12 that is a driving wheel, a front fork 15 that supports a front wheel 14 in a steerable manner, and a swing arm 16 that supports a rear wheel 12. , and a seat 17 for a passenger.
  • the saddle type vehicle 10 is a vehicle in which a passenger is seated astride a seat 17.
  • the saddle type vehicle 10 of this embodiment is an electric scooter having a low floor portion 18.
  • the vehicle body frame 11 includes a head pipe 20 at the front end, a down frame 21 extending rearward and downward from the head pipe 20, a pair of left and right under frames 22 extending rearward from the lower end of the down frame 21, and a rear end of the under frame 22. It has a pair of left and right side frames 23 extending rearward and diagonally upward from.
  • the pair of left and right side frames 23 have a rising frame portion 24 extending rearward and diagonally upward from the respective underframes 22, and a rear frame portion 25 extending rearward from the rising frame portion 24.
  • the rear ends of the pair of left and right rear frame sections 25 are connected by a tail pipe 26.
  • a pair of left and right front forks 15 are attached to the head pipe 20 so as to be steerable.
  • a steering handle 19 is attached to the upper part of the front fork 15.
  • the front wheel 14 is attached to the lower end of the front fork 15 via an axle 14a.
  • a pivot bracket 27 extending rearward is provided between the under frame 22 and the side frame 23.
  • a pivot shaft 28 extending in the left-right direction (vehicle width direction) is supported at the rear end of the pivot bracket 27 .
  • a swing arm 16 extending along the front-rear direction of the saddle-ride type vehicle 10 is pivotally supported on the pivot shaft 28 .
  • the swing arm 16 extends from the pivot shaft 28 to the left side of the rear wheel 12.
  • a rear end portion of the swing arm 16 supports the rear wheel 12 via an axle 12a.
  • An electric motor 13 is built into the swing arm 16.
  • the electric motor 13 is located on the left side of the rear wheel 12. Therefore, the swing arm 16 is configured as a swing type power unit.
  • a rear cushion 29 is connected between the rear end portion of the swing arm 16 and the left rear frame portion 25.
  • the rear frame portion 25 supports the seat 17 on which a passenger is seated from below.
  • a battery 30 is arranged below the seat 17.
  • the battery 30 is supported by a pair of left and right side frames 23 and a pipe 24a that connects the upright frame portion 24 at the front.
  • a PCU (power control unit) 31 as an electronic component is supported diagonally below and behind the battery 30.
  • the PCU 31 is supported by left and right standing frame sections 24.
  • the PCU 31 includes an inverter and the like, and converts, for example, DC power supplied from the battery 30 into AC power, and supplies the converted AC power to the electric motor 13 . Furthermore, during regeneration of the electric motor 13 , the PCU 31 converts the AC power generated by the electric motor 13 into DC power, and charges the battery 30 with the DC power. Note that the locations where the battery 30 and the PCU 31 are arranged shown in FIG. For example, the battery 30 may be placed in a space between a pair of left and right underframes 22.
  • the vehicle body frame 11 is covered by a vehicle body cover 40.
  • the vehicle body cover 40 includes a front cover 41, a handle cover 42, a leg shield 43, a pair of left and right floor side covers 44, an under-seat cover 45, a rear side cover 46, and the like.
  • the front cover 41 covers the front end of the vehicle body frame 11, such as the head pipe 20, from the front.
  • the handle cover 42 covers the left and right center portions of the steering handle 19 above the front cover 41.
  • the leg shield 43 is connected to the rear part of the front cover 41 and covers the head pipe 20 and down frame 21 from the rear.
  • the under-seat cover 45 covers the space below the seat 17 from the front.
  • the floor side cover 44 is connected to the leg shield 43 and the under-seat cover 45, and covers the pair of left and right underframes 22 from both the left and right sides.
  • the rear side cover 46 is connected to the rear edge of the under-seat cover 45 and covers the PCU 31 and the like from both left and right sides.
  • a front fender 47 that covers the front wheel 14 from above is attached to the front fork 15. Further, a rear fender 48 that covers the rear wheel 12 from above is attached to the rear frame portion 25. Furthermore, a hugger fender 49 is attached to the swing arm 16 so as to directly cover the rear wheel 12 from above between the rear fender 48 and the rear wheel 12 and to be able to swing together with the swing arm 16 .
  • a main stand 50 is provided on the side of the swing arm 16. Further, a side stand 51 is disposed near the left standing frame section 24.
  • FIG. 2 is a perspective view of the rear part of the swing arm 16 viewed from the rear left.
  • the swing arm 16 includes a swing arm main body 60 and a swing arm cover 61 attached to the swing arm main body 60.
  • the swing arm main body 60 is a member with a hollow interior. As shown in FIG. 1, the swing arm main body 60 includes a front end portion 60A extending in the vehicle width direction near the pivot shaft 28, a connecting portion 60B extending rearward from the left side of the front end portion 60A, and a rear portion of the connecting portion 60B. It has a motor mounting part 60C provided on the left side of the rear wheel 12, and a rear end part 60D provided behind the motor mounting part 60C.
  • a front end portion 60A of the swing arm main body 60 is pivotally supported by the pivot shaft 28 via a bearing (not shown).
  • the connecting portion 60B has a shape that gradually widens from the front to the rear when viewed from the side.
  • the motor mounting portion 60C is formed in a substantially circular shape when viewed from the side, and is formed to be recessed to the right (inward in the vehicle width direction).
  • a rear cushion 29 is connected to the rear end portion 60D.
  • the rear portion of the connecting portion 60B and the motor mounting portion 60C are open to the left (outside in the vehicle width direction). This opening portion is covered from the left with a swing arm cover 61. Swing arm cover 61 is attached to swing arm body 60 with a plurality of bolts 62.
  • FIG. 3 is a cross-sectional view of the motor mounting portion 60C.
  • the electric motor (rotating electric machine) 13 is housed in the motor mounting portion 60C.
  • the electric motor 13 is a three-phase AC motor.
  • the electric motor 13 includes a stator 90 and a rotor 91.
  • the stator 90 has a cylindrical stator core 90A made of laminated steel plates.
  • a plurality of slots 90B are formed in the stator core 90A in the circumferential direction of the electric motor 13.
  • the plurality of slots 90B are formed at predetermined angular intervals in the circumferential direction.
  • a conductive wire is inserted through the slot 90B and wound around the stator core 90A.
  • stator core 90A is provided with coil 90C.
  • Insertion holes 90D and 90E that penetrate in the axial direction (left-right direction, vehicle width direction) of the motor shaft 92 are formed in the outer circumference (radially outer) of the stator core 90A.
  • the insertion hole 90D and the insertion hole 90E have the same hole shape.
  • the insertion hole 90D and the insertion hole 90E are each formed in the circumferential direction at predetermined angular intervals. Insertion holes 90D and 90E are formed at positions corresponding to the coil 90C. Of these, the bolt 121 (see FIGS. 3 and 4) is inserted through the insertion hole 90E. Bolts 121 in the insertion holes 90E fix the disc-shaped case plates 94 and 95 to both sides of the stator 90 in the axial direction. The case plates 94 and 95 are formed into a circular shape having the same diameter as the stator 90 when viewed in the axial direction.
  • a rotor 91 is arranged inside the stator 90 in the radial direction.
  • the rotor 91 has a cylindrical rotor core 91A made of laminated steel plates.
  • a plurality of slots 91B are formed in the rotor core 91A in the circumferential direction of the electric motor 13.
  • the plurality of slots 91B are formed at predetermined angular intervals in the circumferential direction.
  • a magnet 91C is arranged in the slot 91B.
  • a motor shaft (rotating shaft) 92 extending in the vehicle width direction is arranged at the radial center of the rotor core 91A.
  • the motor shaft 92 is fixed to the rotor core 91A while passing through the rotor core 91A.
  • the motor shaft 92 is rotatably supported by left and right case plates 94 and 95 via bearings 93A and 93B. Therefore, the rotor 91 is rotatably supported by the case plates 94 and 95 together with the motor shaft 92. That is, the rotor 91 rotates around a motor shaft 92 that is arranged substantially parallel to the axle 12a of the rear wheel 12 (see FIG. 1). Note that in the description of this embodiment, the term "substantially parallel” is used to mean parallel even when they are not parallel due to mechanical tolerances or the like.
  • a left end portion (one axial end portion) 92A of the motor shaft 92 protrudes outward in the vehicle width direction (leftward direction) from the left case plate 94.
  • a recess 94A that is recessed inward in the vehicle width direction is formed in the left case plate 94, corresponding to the position of the motor shaft 92.
  • the left end portion 92A and the recessed portion 94A of the motor shaft 92 are covered from the left by a cover member 96.
  • a resolver (rotation angle detection unit) 100 that detects the rotation angle of the motor shaft 92 is disposed in the recess 94A.
  • Resolver 100 includes resolver rotor 100A attached to motor shaft 92, and resolver stator 100B facing resolver rotor 100A.
  • Resolver stator 100B is fixed to left case plate 94.
  • a right end portion (other axial end portion) 92B of the motor shaft 92 projects inward in the vehicle width direction (rightward) from the right case plate 95.
  • a right end portion 96B of the motor shaft 92 protrudes into a reduction gear housing portion 98 provided on the right side of the swing arm main body 60.
  • a deceleration mechanism 99 is arranged in the decelerator housing portion 98, and a right end portion 92B of the motor shaft 92 is connected to the deceleration mechanism 99 via a gear.
  • the speed reduction mechanism 99 transmits the driving force generated by the rotation of the rotor 91 to the axle 12 a of the rear wheel 12 .
  • An oil seal 97A and an O-ring 97B are provided between the right case plate 95 and the motor shaft 92 to prevent lubricating oil from leaking from the reducer housing 98 to the case plate 95.
  • stator 90, rotor 91, motor shaft 92, bearings 93A, 93B, etc. are arranged between case plates 94, 95, and case plates 94, 95 are fixed to stator 90 with bolts 121.
  • stator 90, rotor 91, motor shaft 92, bearings 93A, 93B, and case plates 94, 95 are integrated to form the electric motor 13 of this embodiment.
  • the electric motor 13 is mounted on the motor mounting section 60C.
  • the right end portion 96B of the motor shaft 92 protrudes into the reducer housing portion 98.
  • the electric motor 13 is fixed to the swing arm main body 60 by bolts 120 inserted through holes in the case plate 94, through holes 90D in the stator 90, and holes in the case plate 95.
  • the bolt 120 in the insertion hole 90D is longer than the bolt 121 in the insertion hole 90E.
  • the number and formation position of the insertion holes 90E, 90D, the type and number of bolts 120, 121 (see FIG. 4) screwed into the insertion holes 90E, 90D are arbitrary, and the specifications of the swing arm 16 and electric motor 13 may be determined. It can be changed depending on the situation.
  • the motor mounting portion 60C of the swing arm main body 60 includes an annular base portion 70.
  • the electric motor 13 is fixed to the base 70 with bolts 120.
  • An extension portion 71 extending radially outward from the base portion 70 is formed on the outer peripheral portion (radially outer portion) of the base portion 70 .
  • the extending portion 71 has an annular shape when viewed in the axial direction of the motor shaft 92 .
  • a cylindrical outer peripheral wall (outer wall) 72 that covers the outer periphery of the electric motor 13 is formed on the outer peripheral portion of the extending portion 71 .
  • the outer peripheral wall 72 is formed at a predetermined distance from the outer peripheral surface of the electric motor 13.
  • the outer peripheral wall 72 extends from the extending portion 71 to one side in the vehicle width direction.
  • the base portion 70, the extending portion 71, and the outer peripheral wall 72 constitute a motor mounting portion 60C of this embodiment.
  • a cylindrical inner circumferential wall (inner wall) 80 is arranged radially inside the outer circumferential wall 72 .
  • the inner peripheral wall 80 forms a predetermined gap with the outer peripheral wall 72.
  • the inner peripheral wall 80 is made of metal. In this embodiment, it is press-fitted into the outer periphery of the electric motor 13.
  • the inner circumferential wall 80 is in pressurized contact with the outer circumference of the stator core 90A of the electric motor 13.
  • a space surrounded by the extending portion 71, the outer circumferential wall 72, the inner circumferential wall 80, and the swing arm cover 61 forms the cooling flow path S of this embodiment.
  • the cooling channel S of this embodiment has an annular shape.
  • FIG. 4 is a left side view of the swing arm 16 showing the vicinity of the motor mounting portion 60C.
  • illustration of the left case plate 94 and cover member 96 is omitted.
  • the swing arm cover 61 is shown by a chain double-dashed line.
  • the outer peripheral wall 72 is formed with a front opening 72A opening in the thickness direction, an upper opening 72B, and a lower opening 72C.
  • the front opening 72A, the upper opening 72B, and the lower opening 72C are formed spaced apart from each other in the circumferential direction.
  • the cooling channel S communicates with the outside through the front opening 72A, the upper opening 72B, and the lower opening 72C.
  • air (cooling medium) A flows into the cooling channel S from the outside, circulates within the cooling channel S, and then flows out.
  • the front opening (the other opening) 72A is formed forward and below the motor shaft 92. Since the front opening 72A is provided in front of and below the motor shaft 92, air A caused by the traveling wind W etc. can be easily taken into the cooling passage S through the front opening 72A. Air A flowing in from the front opening 72A is divided by the inner circumferential wall 80 into air A flowing upward and air A flowing downward.
  • the upper opening (one opening) 72B is formed above the motor shaft 92.
  • the upper opening 72B is formed corresponding to the top of the cylindrical outer peripheral wall 72.
  • the upper opening 72B is formed so as to straddle the vertical line L passing through the center of the motor shaft 92. Therefore, the cooling channel S includes a first channel S1 that connects the front opening 72A and the upper opening 72B on the front side of the motor shaft 92, and a second channel S1 that is longer in the circumferential direction than the first channel S1. road S2.
  • the air A that has flowed into the cooling channel S from the front opening 72A moves within the cooling channel S and flows out from the upper opening 72B. Therefore, the electric motor 13 is cooled by the air A within the cooling channel S. At this time, the temperature of the air A increases due to the heat from the electric motor 13, so that the air A tends to rise. Therefore, the upper opening 72B allows the heated air A to easily flow out from the cooling passage S even when the traveling wind W is not obtained when the saddle-ride type vehicle 10 is stopped. Therefore, in this embodiment, the air A is less likely to stay between the inner circumferential wall 80 and the outer circumferential wall 72, and the air is easily circulated within the cooling channel S. Therefore, the heat radiation efficiency of the electric motor 13 is improved.
  • a lower opening (third opening) 72C is formed in the outer peripheral wall 72 corresponding to the second flow path S2.
  • the lower opening 72C is provided rearward and lower than the front opening 72A. In this embodiment, it is formed corresponding to the lowest part of the cooling channel S. Specifically, the lower opening 72C is formed across the vertical line L passing through the motor shaft 92. Between the front opening 72A and the lower opening 72C, the cooling flow path S slopes downward as it goes rearward.
  • foreign substances such as sand and water may also flow in.
  • foreign substances such as sand are likely to move to the second channel S2 due to their own weight, and are likely to move toward the lower opening 72C.
  • the foreign matter that has flowed into the cooling channel S can be discharged from the lower opening 72C at the lowermost portion, so that the foreign matter is prevented from becoming clogged between the outer circumferential wall 72 and the inner circumferential wall 80.
  • the foreign matter remains in the cooling channel S, it is possible to suppress the foreign matter from coming into contact with the wall surface and generating abnormal noise.
  • An introduction wall portion (blade) 72D is provided on the outer peripheral wall 72 depending on the formation position of the front opening 72A.
  • the introduction wall portion 72D extends forward from the lower edge 72A1 of the front opening 72A.
  • the introduction wall portion 72D has an introduction surface 72D1 that slopes downward as it advances forward.
  • the introduction surface 72D1 extends further forward than the upper edge 72A2 of the front opening 72A.
  • the introduction wall 72D makes it easy to take in the traveling wind W flowing in the front-rear direction into the front opening 72A.
  • the outer peripheral wall 72 is provided with an upwardly extending portion 72E depending on the position where the upper opening 72B is formed.
  • the upper extending portion 72E covers the upper opening 72B from above.
  • the upper extending portion 72E has an eave shape extending rearward upward. Specifically, the upwardly extending portion 72E extends in the tangential direction of the outer peripheral wall 72 from the front edge 72B1 of the upper opening 72B. The upwardly extending portion 72E extends to the rear of the rear edge 72B2 of the upper opening 72B.
  • the upwardly extending portion 72E easily prevents rainwater, mud, etc. from entering the cooling channel S from the upper opening 72B.
  • the outer peripheral wall 72 is provided with a downwardly extending portion (second blade) 72F.
  • the downward extending portion 72F has a plate shape that extends downward toward the front. Specifically, the downwardly extending portion 72F extends in the tangential direction of the outer peripheral wall 72 from the rear edge 72C1 of the lower opening 72C. The downward extending portion 72F extends forward of the vertical line L. The downward extending portion 72F allows the traveling wind W to easily flow in from the lower opening 72C through which foreign matter is discharged.
  • the inner peripheral wall 80 is formed with a protrusion 80A that protrudes toward the upper opening 72B.
  • the protrusion 80A has a substantially right triangular shape when viewed from the side.
  • the protrusion 80A includes a front surface 80B that slopes upward as it goes rearward, and a rear surface 80C that extends from the rear end of the front surface 80B toward the center in the radial direction.
  • the front surface 80B allows air A in the first flow path S1 to be guided to the upper opening 72B.
  • the rear surface 80C allows air A in the second flow path S2 to be guided to the upper opening 72B.
  • a heat conduction tube (heat conduction member) 81 extending along the cooling flow path S is arranged in the cooling flow path S.
  • the heat conduction tube 81 is made of metal.
  • the heat conduction tube 81 of this embodiment has a honeycomb structure (see FIG. 3).
  • the heat conduction tube 81 is press-fitted between the inner circumferential wall 80 and the outer circumferential wall 72.
  • the heat conduction tube 81 increases the contact area with the air A, increasing cooling efficiency.
  • the heat conduction tubes 81 include a first heat conduction tube 81A disposed between the front opening 72A and the upper opening 72B, and a second heat conduction tube 81B disposed between the lower opening 72C and the upper opening 72B. and. Therefore, the heat conduction tube 81 is not arranged between the front opening 72A and the lower opening 72C. Thereby, the cooling efficiency can be increased by the heat conduction tube 81, and the cooling channel S portion where foreign matter may be mixed can be made into a wide space. That is, it is possible to prevent the gaps between the heat conduction tubes 81 from being filled with foreign matter.
  • the first heat conduction tube 81A is arranged so as to be spaced apart from the front opening 72A by a predetermined distance toward the upper opening 72B. Further, the second heat conduction tube 81B is arranged so as to be spaced apart from the lower opening 72C by a predetermined distance toward the upper opening 72B. This prevents the air A flowing in from the front opening 72A and the lower opening 72C from bending too much in the cooling channel S, and the resistance of the heat conduction tube 81 prevents the air A from flowing through the front opening 72A and the lower opening 72C. This can prevent it from becoming difficult for people to enter.
  • the motor mounting portion 60C is covered with a swing arm cover 61.
  • Opening-shaped notches 61A, 61B, and 61C are formed in the swing arm cover 61 according to the respective positions of the front opening 72A, the upper opening 72B, and the lower opening 72C.
  • Each of the front opening 72A, upper opening 72B, and lower opening 72C communicates with the outside of the swing arm cover 61 through the cutouts 61A, 61B, and 61C.
  • the notches 61A, 61B, and 61C prevent each of the introduction wall portion 72D, the upper extension portion 72E, and the lower extension portion 72F from coming into contact with the swing arm cover 61.
  • the upper extending portion 72E and the lower extending portion 72F extend to the outside of the swing arm cover 61 (see FIG. 1).
  • a harness 101 extending from the PCU 31 is connected to the electric motor 13.
  • the harness 101 is electrically connected to the electric motor 13 via a connector (connection part) 105.
  • the connector 105 is connected to a connector (not shown) of the electric motor 13 through an opening (not shown) formed in the extension part 71 of the motor mounting part 60C.
  • Connector 105 is arranged in front of motor shaft 92.
  • Connector 105 is arranged above front opening 72A. Since the connector 105 is disposed above the front opening 72A, even if water enters the cooling channel S from the front opening 72A, water can be prevented from splashing on the connector 105.
  • the harness 101 is routed to the right side of the swing arm body 60 through the opening 60B1 of the swing arm body 60, and is connected to the PCU 31.
  • the harness 101 is composed of a power supply line 102 and communication lines 103 and 104.
  • the power supply line 102 is connected to the U-phase, V-phase, and W-phase coils 90C so as to be able to supply power.
  • the power supply line 102 supplies AC power to the electric motor 13.
  • the first communication line 103 is electrically connected to the resolver 100. Via the first communication line 103, the detection results of the rotation angles of the rotor 91 and the motor shaft 92 by the resolver 100 are transmitted to and received from the PCU 31.
  • the second communication line 104 is an electric cable that is electrically connected to temperature sensors (temperature detection devices) 111, 112, and 113 corresponding to the U phase, V phase, and W phase. Temperature sensors 111, 112, and 113 are arranged in stator core 90A in coil 90C portions corresponding to U-phase, V-phase, and W-phase.
  • the temperature sensors 111 to 113 are provided above the front opening 72A.
  • twelve coils 90C are provided.
  • the first temperature sensor 111 is arranged in the stator core 90A of the coil 90C in the horizontal direction and in front of the motor shaft 92.
  • the second temperature sensor 112 and the third temperature sensor 113 are arranged above the first temperature sensor 111.
  • the second temperature sensor 112 and the third temperature sensor 113 are arranged for every other coil 90C in the clockwise direction.
  • the temperature sensors 111 to 113 are arranged above a horizontal plane passing through the motor shaft 92. Since the temperature sensors 111 to 113 are arranged above the front opening 72A, when water enters the cooling channel S from the front opening 72A, water can be prevented from splashing on the temperature sensors 111 to 113.
  • the electric motor 13 includes the rotor 91 that rotates around the motor shaft 92 arranged substantially parallel to the axle 12a, and the stator 90.
  • a saddle-ride type vehicle 10 having an inner circumferential wall 80 surrounding the outer circumference of an electric motor 13, and an outer circumferential wall 72 disposed at a predetermined interval from the inner circumferential wall 80, the outer circumferential wall 72 having at least two openings. 72A and 72B are provided, and at least one of the two openings 72A and 72B is provided above the motor shaft 92.
  • the air A flowing between the inner circumferential wall 80 and the outer circumferential wall 72 is heated and tends to move upward, so the presence of the opening above makes it easier to circulate the air A. Therefore, according to this configuration, it is possible to provide the saddle type vehicle 10 in which the heated air A is easily circulated and the heat dissipation efficiency is improved.
  • the other of the two openings 72A and 72B is provided in front of and below the motor shaft 92.
  • the front opening 72A allows the running wind W to be easily taken in between the inner circumferential wall 80 and the outer circumferential wall 72, and the air from below to above the electric motor 13 can be drawn between the inner circumferential wall 80 and the outer circumferential wall 72. You can create the flow of A.
  • the outer peripheral wall 72 further has a lower opening 72C, and the lower opening 72C is provided rearward and lower than the front opening 72A.
  • the air A flowing in from the front opening 72A contains foreign matter such as sand or water, the foreign matter can be dropped from the lower opening 72C. Therefore, it is possible to prevent foreign matter from getting stuck between the outer circumferential wall 72 and the inner circumferential wall 80, or from causing abnormal noise due to the remaining foreign matter coming into contact with the outer circumferential wall 72 and the inner circumferential wall 80.
  • the heat conduction tube 81 is arranged between the inner circumferential wall 80 and the outer circumferential wall 72, and the heat conduction tube 81 is not disposed between the front opening 72A and the lower opening 72C. According to this configuration, it is possible to prevent the heat conduction tube 81 from interfering with the movement of foreign matter moving from the front opening 72A to the lower opening 72C.
  • a power supply line 102 and communication lines 103 and 104 are connected to the electric motor 13 via a connector 105, and the front opening 72A is provided below the connector 105. According to this configuration, when water enters between the outer circumferential wall 72 and the inner circumferential wall 80, it is possible to suppress water from splashing onto the connector 105.
  • temperature sensors 111 to 113 for detecting the temperature of stator 90 are attached to stator 90, and front opening 72A is provided below temperature sensors 111 to 113. According to this configuration, when water enters between the outer circumferential wall 72 and the inner circumferential wall 80, it is possible to suppress the water from splashing on the temperature sensors 111 to 113.
  • the outer peripheral wall 72 is provided with an introduction wall portion 72D that promotes the inflow of wind into the front opening 72A. According to this configuration, it becomes easier to allow the running wind W to flow in from the front opening 72A, and cooling performance can be improved.
  • the outer peripheral wall 72 is provided with a downwardly extending portion 72F that promotes the inflow of wind into the lower opening 72C. According to this configuration, it is possible to easily allow the running wind W to flow in also from the lower opening 72C through which foreign matter is discharged.
  • the outer peripheral wall 72 is provided with an upwardly extending portion 72E that covers the upper opening 72B from above. According to this configuration, it is possible to prevent rainwater, mud, etc. from entering through the upper opening 72B.
  • the heat conduction tube 81 is spaced apart from the openings 72A and 72C by a predetermined distance. According to this configuration, it is possible to prevent the traveling wind W from entering through the openings 72A and 72C due to the resistance of the heat transfer tube 81.
  • the outer circumferential wall 72 has three openings that communicate the cooling flow path S to the outside, that is, the front opening 72A, the upper opening 72B, and the lower opening 72C. It is sufficient that two openings are formed.
  • the outer peripheral wall 72 corresponding to the outer wall is formed on the swing arm main body 60, and the inner peripheral wall 80 corresponding to the inner wall is formed as a separate component from the swing arm main body 60.
  • the present invention is not limited to this, and the outer circumferential wall 72 and the inner circumferential wall 80 may be integrally configured.
  • the inner peripheral wall 80 and the outer peripheral wall 72 may be formed integrally with the swing arm main body 60.
  • the inner circumferential wall 80 and the outer circumferential wall 72 may be formed integrally with the swing arm cover 61.
  • the heat conductive member may also be formed integrally with the outer peripheral wall 72 and the inner peripheral wall 80.
  • a configuration in which the inner circumferential wall 80 is press-fitted into the outer circumference of the stator is desirable in terms of heat conduction, but a space may be provided between the inner circumferential wall 80 and the stator core 90A. This makes it easier to assemble the inner circumferential wall 80 compared to the case where the inner circumferential wall 80 is press-fitted. In this case, it is desirable to fill the space between the inner peripheral wall 80 and the stator core 90A with a heat conduction promoter such as thermal grease.
  • the heat conductive member may have a fin shape disposed in the cooling channel S.
  • a peripheral wall 80 may also be provided.
  • the downward extending portion 72F that extends forwardly and downwardly is provided depending on the formation position of the lower opening 72C.
  • the downward extending portion 72F may be directed backwardly. It may be provided so as to be open.
  • a downwardly extending portion extending downward from the front side of the lower opening 72C may be provided. Thereby, foreign matter that has entered through the front opening 72A can be easily discharged to the rear.
  • the saddle type vehicle 10 having the front wheels 14 and the rear wheels 12 has been described as an example of the vehicle, but the present invention is not limited to this. It is applicable to vehicles with four or more wheels.
  • a rotating electric machine including a rotor that rotates around a rotating shaft arranged substantially parallel to an axle, and a stator, an inner wall surrounding the outer periphery of the rotating electric machine, and arranged at a predetermined distance from the inner wall.
  • a vehicle comprising: an outer wall, the outer wall being provided with at least two openings, and at least one of the two openings being provided above the rotation axis. According to this configuration, the cooling medium flowing between the inner wall and the outer wall is heated and easily moves upward, so the presence of the opening at the top facilitates the circulation of the cooling medium. Therefore, according to this configuration, it is possible to provide a vehicle equipped with a rotating electric machine in which the heated cooling medium is easily circulated and the heat dissipation efficiency is improved.
  • Configuration 2 The vehicle according to Configuration 1, wherein the other of the two openings is provided forward and below the rotation axis. According to this configuration, the other opening makes it easy to take in the running wind between the inner wall and the outer wall, and it is possible to create a flow of the cooling medium from the lower side to the upper side of the rotating electric machine between the inner wall and the outer wall.
  • a heat conductive member is disposed between the inner wall and the outer wall, and the heat conductive member is not disposed between the other opening and the third opening.
  • a power supply line and a communication line are connected to the rotating electrical machine via a connection part, and the other opening is provided below the connection part.
  • Vehicles listed in any of the above According to this configuration, when water enters between the outer wall and the inner wall, it is possible to suppress water from splashing on the connection portion.
  • Configuration 6 Any one of configurations 2 to 5, wherein a temperature detection device for detecting the temperature of the stator is attached to the stator, and the other opening is provided below the temperature detection device. Vehicles listed in. According to this configuration, when water enters between the outer wall and the inner wall, it is possible to suppress water from splashing on the temperature detection device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un véhicule comprenant une machine électrique rotative dans laquelle un milieu de refroidissement chauffé peut facilement circuler, et qui présente une efficacité de dissipation de chaleur améliorée.　Le véhicule comprend : une machine électrique rotative (13) comprenant un stator (90) et un rotor (91) qui tourne autour d'un axe de rotation (92) disposé approximativement parallèlement à un essieu de véhicule (12a); une paroi interne (80) qui entoure la périphérie externe de la machine électrique rotative (13); et une paroi externe (72) disposée à un intervalle prescrit de la paroi interne (80). La paroi externe (72) est pourvue d'au moins deux ouvertures (72A, 72B), l'une au moins des deux ouvertures (72A, 72B) étant disposée au-dessus de l'axe de rotation (92).
PCT/JP2022/016593 2022-03-31 2022-03-31 Véhicule WO2023188295A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08214501A (ja) * 1995-01-31 1996-08-20 Fuji Electric Co Ltd 電気自動車用回転電機の通風冷却装置
JP2000116062A (ja) * 1998-09-29 2000-04-21 Toshiba Corp 車両用電動機
JP2021035110A (ja) * 2019-08-21 2021-03-01 株式会社シマノ ドライブユニット、ドライブシステム、および、カバー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08214501A (ja) * 1995-01-31 1996-08-20 Fuji Electric Co Ltd 電気自動車用回転電機の通風冷却装置
JP2000116062A (ja) * 1998-09-29 2000-04-21 Toshiba Corp 車両用電動機
JP2021035110A (ja) * 2019-08-21 2021-03-01 株式会社シマノ ドライブユニット、ドライブシステム、および、カバー

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