WO2022208732A1 - モーター構造および電動車両 - Google Patents
モーター構造および電動車両 Download PDFInfo
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- WO2022208732A1 WO2022208732A1 PCT/JP2021/013855 JP2021013855W WO2022208732A1 WO 2022208732 A1 WO2022208732 A1 WO 2022208732A1 JP 2021013855 W JP2021013855 W JP 2021013855W WO 2022208732 A1 WO2022208732 A1 WO 2022208732A1
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- WIPO (PCT)
- Prior art keywords
- motor
- stator
- case
- cover
- power
- Prior art date
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- 230000005855 radiation Effects 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 description 24
- 238000001816 cooling Methods 0.000 description 20
- 238000003466 welding Methods 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Definitions
- the present invention relates to motor structures and electric vehicles.
- Patent Document 1 an electric vehicle equipped with a power unit that drives drive wheels with power obtained from a motor is known (see, for example, Patent Document 1).
- the power unit of Patent Document 1 includes a motor, a power transmission mechanism that transmits power obtained from the motor to rear wheels, and a swing frame that supports the motor and the power transmission mechanism.
- the swing frame includes an inner cover that covers the motor from the inside in the vehicle width direction, and an outer cover that covers the motor from the outside in the vehicle width direction.
- the motor includes a tubular rotor fixed to the motor output shaft, and a stator arranged on the outer circumference of the rotor.
- the stator is fixed to the inner cover.
- the stator is covered from the outside by an outer cover.
- An object of the present invention is to improve the cooling performance of the stator without increasing the number of parts.
- a motor structure includes a motor (30) including a cylindrical rotor (32) and a stator (33) arranged on the inner or outer circumference of the rotor (32); 32), a case (23) housing and holding the motor (30) on the output side of the rotating shaft (31), and a surface (25f) exposed to the outside. and a cover (25) covering at least part of the motor (30), wherein the stator (33) is attached to each of the case (23) and the cover (25). Fixed in contact. According to this configuration, the heat of the stator can be dissipated through the case and the cover, respectively. improves. In addition, the heat of the stator can be dissipated through the surface of the cover exposed to the outside. In addition, since there is no need to newly provide a cooling device for cooling the stator, the number of parts does not increase. Therefore, the cooling performance of the stator can be improved without increasing the number of parts.
- An electric vehicle includes the motor structure (30A) described above, the case (23) is provided in the power unit (10) of the electric vehicle (1), and the rotating shaft (31) is provided with the The rotation of the motor (30) is transmitted to the driving wheels (4) of the electric vehicle (1). According to this configuration, since the above motor structure is provided, it is possible to provide an electric vehicle capable of improving the cooling performance of the stator without increasing the number of parts.
- the stator (33) is arranged on the outer periphery of the rotor (32), and at least part of the stator (33) is formed by the case (23) and the cover (25). may be exposed to the outside. According to this configuration, outside air can be directly applied to the stator arranged on the outer circumference of the rotor, so that the cooling performance of the stator is further improved compared to the case where the stator is arranged on the inner circumference of the rotor. be able to.
- the stator (33) may be fastened together with the cover (25) to the case (23). According to this configuration, the number of parts can be reduced compared to the case where the stator and the cover are fastened with separate fastening members.
- the outer surface of the cover (25) may be provided with radiation fins (25a). According to this configuration, the heat transmitted from the stator to the cover can be released through the heat radiation fins on the outer surface of the cover, so that the heat can be released more effectively.
- the cover (25) has a wall surface (25b) having a shape corresponding to the outer shape of the stator (33), and the stator (33) is located on the cover (25). It may be fixed in surface contact with the wall surface (25b). According to this configuration, the heat of the stator can be dissipated through the wall surface of the cover, so the cooling performance of the stator can be further improved compared to the case where the stator is fixed in point contact with the cover. .
- the case (23) has an opening (23h) that opens at a position facing an axial end face (30f) of the motor (30). ) may be drawn out through the opening (23h) of the case (23).
- the outside air is not blocked by the electric wires, and it is possible to suppress deterioration of the cooling performance by the cover.
- deterioration in appearance can be suppressed as compared with the case where the wires are pulled out from the cover.
- FIG. 1 is a left side view of a motorcycle according to an embodiment
- FIG. FIG. 2 is a diagram including the II-II section of FIG. 1
- 1 is a rear view of a motorcycle according to an embodiment
- FIG. 1 is a left side view of the rear portion of a motorcycle according to an embodiment
- FIG. Fig. 5 is a left side view showing a state in which an exterior cover is removed in Fig. 4
- FIG. 6 is a left side view showing a state in which a case cover is removed in FIG. 5
- Fig. 7 is a left side view showing a state in which the motor is removed in Fig. 6
- FIG. 5 is a view including the VIII-VIII section of FIG.
- FIG. 4 1 is a left side view of the motorcycle according to the embodiment with some parts removed;
- FIG. 1 is a bottom view of a motorcycle according to an embodiment;
- FIG. 10 is a diagram including the XI-XI section of FIG. 9;
- FIG. 11 is a diagram including the XII-XII section of FIG. 10;
- FIG. 1 shows a unit swing type motorcycle 1 as an example of an electric vehicle.
- a motorcycle 1 includes front wheels 3 steered by a steering wheel 2 and rear wheels 4 (driving wheels) driven by a power unit 10 including a power source.
- the motorcycle may be simply referred to as a "vehicle”.
- the motorcycle 1 of the embodiment is a scooter-type vehicle having a step floor 9 on which a rider seated on a seat 8 puts his/her feet.
- Steering system parts including the steering wheel 2 and the front wheel 3 are steerably supported by the head pipe 12 of the vehicle body frame 11 .
- the outer periphery of the body frame 11 is covered with a body cover 5.
- reference numeral 6 denotes a front fork.
- the vehicle body frame 11 is formed by integrally joining a plurality of types of steel materials by welding or the like.
- the vehicle body frame 11 includes a head pipe 12 , a main frame 13 , a down frame 14 , a seat frame 15 and a support frame 16 .
- the head pipe 12 extends obliquely such that the upper end of the head pipe 12 is positioned rearward and the lower end of the head pipe 12 is positioned forward when viewed from the side.
- the main frame 13 extends obliquely rearward and downward from the head pipe 12 in a side view.
- a pair of left and right down frames 14, seat frames 15, and support frames 16 are provided.
- the down frame 14 extends from the lower portion of the head pipe 12 obliquely downward to the rear at a steeper angle than the main frame 13, then extends substantially horizontally rearward, and then extends obliquely upward to the rear.
- the seat frame 15 extends obliquely rearward and upward from the upper and lower intermediate portions of the main frame 13, is connected to the rear upper end of the down frame 14, and then extends obliquely rearward and upward.
- the support frame 16 extends obliquely rearward and upward from the rear portion of the down frame 14 and is connected to the rear portion of the seat frame 15 .
- the power unit 10 supports a motor 30 as a drive source arranged on the left side of the rear wheel 4, a power transmission mechanism 35 capable of driving the rear wheel 4 with power obtained from the motor 30, and the motor 30 and the power transmission mechanism 35. and a swing frame 20 for swinging.
- the power unit 10 is a swing type power unit in which a motor 30, a power transmission mechanism 35 and a swing frame 20 are integrated.
- the rear end of the power unit 10 is provided with an axle 4a for the rear wheels 4 (hereinafter also referred to as "rear axle 4a").
- the power obtained from the motor 30 is transmitted to the rear wheel axle 4a via the power transmission mechanism 35, thereby driving the rear wheel 4 supported by the rear wheel axle 4a and causing the vehicle to travel.
- Reference character CR in the drawing indicates the central axis (rear wheel axis) of the rear wheel axle 4a, which is parallel to the vehicle width direction.
- the front lower part of the power unit 10 is supported on the rear side of the lower part of the vehicle body frame 11 via a link mechanism 19 so as to be able to swing vertically.
- a pair of left and right rear cushions 7 for damping swinging of the power unit 10 are stretched.
- L may be attached to components located on the left side in the vehicle width direction
- R may be attached to components located on the right side in the vehicle width direction.
- the swing frame 20 includes a main arm 21 extending from the front of the rear wheel 4 toward the left side of the rear wheel 4 and a main arm 21 extending from the front right side of the main arm 21 toward the right side of the rear wheel 4 . and a sub-arm 22 that extends while curving inward in the vehicle width direction.
- Reference symbol CL in the figure indicates the left-right center line of the vehicle body.
- the main arm 21 includes a power housing portion 23 (case) that houses the motor 30, a transmission housing portion 24 that houses the power transmission mechanism 35, and an arm portion 21a that extends forward from the power housing portion 23.
- the arm portion 21 a extends forward and backward so as to be connected to the power housing portion 23 .
- Reference numeral 21b in the drawing denotes a pair of left and right forward extending portions extending forward from the front end portion of the arm portion 21a.
- the sub-arm 22 extends forward and backward on the right side of the rear wheel 4.
- the front end of the sub arm 22 is coupled to the right side of the front of the main arm 21 by a fastening member such as a bolt.
- reference numeral 22j denotes a connecting portion of the sub arm 22 to the main arm 21.
- the rear end of the sub arm 22 is provided with a right cushion support stay 27 that protrudes rearward and upward and supports the right rear cushion 7R.
- the power unit 10 is provided with a motor structure 30A.
- the motor structure 30A includes a motor 30, a motor output shaft 31 (rotating shaft) fixed to an inner rotor 32 (rotor) of the motor 30, and a power housing that houses and holds the motor 30 on the output side of the motor output shaft 31. and a case cover 25 (cover) having a surface 25 f exposed to the outside and covering at least a portion of the motor 30 .
- the power housing portion 23 is a portion of the main arm 21 that constitutes the power unit 10 and covers the motor 30 from the inside in the vehicle width direction.
- the power housing portion 23 has a box shape that opens outward in the vehicle width direction.
- the power housing portion 23 is formed integrally with the same member as the arm portion 21 a of the main arm 21 .
- the motor output shaft 31 extends in the vehicle width direction.
- the motor output shaft 31 has an axis Cm1 (hereinafter also referred to as "motor axis Cm1") parallel to the rear wheel axis CR.
- the motor output shaft 31 is rotatably supported by the main arm 21 and the like.
- Reference numerals 34a to 34c in the drawing denote bearings that rotatably support the motor output shaft 31. As shown in FIG.
- the motor 30 is arranged on the left side of the rear wheel 4 .
- the motor 30 is an inner rotor type motor.
- the motor 30 includes a tubular inner rotor 32 fixed to the motor output shaft 31 and a stator 33 arranged on the outer circumference of the inner rotor 32 .
- the inner rotor 32 includes a cylindrical inner rotor main body 32a and magnets 32b provided on the outer peripheral surface of the inner rotor main body 32a.
- a radial center portion of the inner rotor main body 32 a is spline-connected to the motor output shaft 31 .
- a detected body 32c is attached to the outer peripheral surface of the inner end portion of the inner rotor main body 32a in the vehicle width direction.
- the stator 33 includes an annular stator yoke 33a fixed to the outer peripheral wall of the power housing portion 23, a plurality of teeth 33b joined to the stator yoke 33a and radially provided with respect to the motor axis Cm1, and a conducting wire connected to the teeth 33b. and a coil 33c wound around.
- a rotation angle sensor 33d for detecting the detected body 32c is attached to the stator yoke 33a.
- a battery 100 (see FIG. 9) is connected to the motor 30. Battery 100 supplies power to motor 30 when motor 30 drives rear wheels 4 . Note that the control of the motor 30 is performed by a control unit (not shown).
- the case cover 25 covers the motor 30 from the outside in the vehicle width direction.
- the case cover 25 has a box shape that opens inward in the vehicle width direction.
- the case cover 25 is formed in a cylindrical shape with a bottom centered on the motor axis Cm1.
- the case cover 25 is coupled to the power housing portion 23 with bolts 25j (fastening members).
- the stator 33 is fastened together with the case cover 25 to the power housing portion 23 .
- the stator yoke 33a is fixed to the power housing portion 23 together with the case cover 25 by a plurality of (for example, four in this embodiment) bolts 25j.
- the outer surface of the case cover 25 is provided with heat radiation fins 25a.
- the radiation fins 25a are formed in a plate shape extending in the front-rear direction in a side view and having a thickness in the vertical direction.
- a plurality of heat radiation fins 25a are provided at substantially the same intervals in the vertical direction.
- a plurality of radiating fins 25 a are provided on the outer surface of the case cover 25 excluding the central portion and the outer peripheral portion.
- a portion where the plurality of radiation fins 25a are installed has an annular shape when viewed from the side.
- the radiation fins 25a are formed integrally with the same member as the case cover 25. As shown in FIG.
- the stator 33 is fixed in contact with the power housing portion 23 and the case cover 25 respectively.
- the case cover 25 has a wall surface 25 b having a shape corresponding to the outer shape of the stator 33 .
- a wall surface 25b of the case cover 25 is formed in an annular shape so as to overlap the outer surface of the stator yoke 33a in the vehicle width direction when viewed in the vehicle width direction.
- the stator 33 is fixed in surface contact with the wall surface 25 b of the case cover 25 .
- the stator 33 may be fixed with the vehicle width direction outer surface of the stator yoke 33a in contact with the wall surface 25b of the case cover 25 as a whole.
- At least part of the stator 33 is exposed outside from the power housing portion 23 and the case cover 25 .
- the outer peripheral surface of the stator yoke 33a is exposed radially outward between the power accommodating portion 23 and the case cover 25 in the vehicle width direction.
- the stator 33 may be fixed with the outer peripheral surface of the stator yoke 33a exposed over the entire circumferential direction.
- the power housing portion 23 has an opening 23h that opens at a position facing the axial end face 30f of the motor 30 (the inner end face in the vehicle width direction).
- the opening 23h is sized to allow the electric wires 80, 82 (see FIG. 6) extending from the motor 30 to be inserted thereinto.
- the opening 23h opens outward in the vehicle width direction at a position forward of the motor axis Cm1.
- the opening 23h extends forward from a position facing the axial end face 30f of the motor 30, and then opens inside the arm portion 21a. Electric wires 80 and 82 (see FIG. 6) extending from the motor 30 are pulled out through the opening 23h of the power housing portion 23 to the outside.
- the transmission accommodating portion 24 includes an inner case 24a arranged on the left side of the rear wheel 4 on the inner side in the vehicle width direction, and an outer case 24b that covers the inner case 24a from the outer side in the vehicle width direction.
- the inner case 24a has a box shape that opens outward in the vehicle width direction.
- the outer case 24b has a box shape that opens inward in the vehicle width direction.
- the outer case 24b is formed integrally with the same member as the power accommodating portion 23 of the main arm 21. As shown in FIG.
- the outer case 24b is connected to the inner case 24a by fastening members such as bolts.
- a fender stay 40 is supported by the transmission accommodating portion 24 .
- the fender stay 40 extends rearward and upward from the vicinity of the rear wheel axle 4a (see FIG. 2) and supports a fender 50 arranged rearward and upward of the rear wheel.
- reference numeral 28 indicates a center stand (hereinafter also simply referred to as "stand")
- reference numeral 29 indicates a rear brake.
- the power transmission mechanism 35 is arranged on the left side of the rear wheel 4 .
- the power transmission mechanism 35 is provided inside the transmission housing portion 24 that continues to the power housing portion 23 .
- the power transmission mechanism 35 includes a transmission shaft 36 supported parallel to the motor output shaft 31 and the rear wheel axle 4a, and a vehicle width direction inner end portion of the motor output shaft 31 and a vehicle width direction inner portion of the transmission shaft 36, respectively.
- a first pair of gears 37a and 37b are provided, and a second pair of gears 38a and 38b are provided respectively on the vehicle width direction outside portion of the transmission shaft 36 and the left end portion of the rear wheel axle 4a.
- Reference numerals 4b to 4d in the drawing denote bearings that rotatably support the rear wheel axle 4a.
- the motor output shaft 31, the transmission shaft 36, and the rear wheel axle 4a are spaced apart in the front-rear direction in order from the front side.
- the transmission shaft 36 has an axis Ct1 (hereinafter also referred to as "transmission axis Ct1") parallel to the motor axis Cm1.
- Reference numerals 39a and 39b in the drawing denote bearings that rotatably support the transmission shaft 36. As shown in FIG. With this configuration, the rotation of the motor output shaft 31 is reduced by a predetermined reduction ratio and transmitted to the rear wheel axle 4a.
- control unit centrally controls the motor 30 .
- the control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.
- the control unit receives information from a throttle opening sensor (not shown) or the like and outputs a predetermined control signal to the driver of the motor 30 .
- a fender structure 50A that supports a fender 50 arranged behind and above the rear wheel 4 with a fender stay 40 is provided at the rear of the vehicle.
- the fender structure 50A has a cantilever structure in which only the left side portion of the fender 50 is fixed to the fender stay 40 .
- reference numeral 54 denotes a tail lamp
- reference numeral 55 denotes a license plate
- reference numeral 57 denotes a reflector.
- the fender structure 50A includes a fender stay 40 and a fender 50.
- the fender stay 40 is provided with a left cushion support portion 43 that supports the left rear cushion 7L.
- the vehicle is provided with a three-phase line 80 (electric wire) extending back and forth toward the motor 30 .
- a three-phase line 80 (electric wire) extending back and forth toward the motor 30 .
- one end (rear end) of the three-phase line 80 is located inside the motor 30 (see FIG. 6) in the vehicle width direction.
- Motor 30 is electrically connected to an inverter unit (not shown) via three-phase line 80 .
- reference numeral 81 denotes a tube covering the three-phase line 80
- reference numeral 82 denotes wiring (electric wire) electrically connected to the rotation angle sensor 33d.
- the electric wires 80 and 82 extend forward through the opening 23 h of the power housing portion 23 .
- the wiring 82 extends back and forth above the three-phase line 80 .
- the inverter unit is equipped with an inverter capable of mutual conversion between DC power and three-phase AC power, a gate driver that controls the inverter, and a current sensor that measures current flow.
- the inverter unit drives and controls the motor 30 with power supplied from the battery 100 (see FIG. 9).
- Battery 100 supplies DC power to the inverter unit through a power cable.
- the inverter unit converts the DC power supplied from the battery 100 into three-phase AC power, and supplies the three-phase AC power to the motor 30 through the three-phase line 80 .
- the motor 30 is rotationally driven by three-phase AC power supplied from the inverter unit.
- a motor output shaft 31 transmits the rotation of the motor 30 to the rear wheels 4 .
- the vehicle runs as the motor 30 rotates and the rear wheels 4 rotate.
- the inverter unit obtains regenerated power from the motor 30 by braking force, converts the obtained regenerated power into DC power, and supplies it to the battery 100 .
- the battery 100 is charged with DC power supplied from the inverter unit.
- an opening 84 is provided below the motor 30 by the power housing portion 23 and the case cover 25 .
- the power unit 10 is provided with an exterior cover 85 that covers the power housing portion 23 and the case cover 25 from the outside so as to cover the opening 84 from below.
- the exterior cover 85 covers the joint surface between the power housing portion 23 and the case cover 25 from above and below. As shown in FIG. 4, the exterior cover 85 is fixed to the main arm 21 and the like by fastening members such as bolts.
- reference numeral 85j denotes bolts for fixing the exterior cover 85.
- reference numeral 85k denotes a connecting portion of the main arm 21 and the like to the exterior cover 85. As shown in FIG.
- the exterior cover 85 extends forward and backward on the left side of the main arm 21 along the main arm 21 .
- the exterior cover 85 is provided with an opening 85h that exposes a portion of the case cover 25 to the outside in the vehicle width direction.
- outside air arrows W1 and W2 in the figure
- the exterior cover 85 narrows so that the vertical interval becomes narrower toward the opening 85h.
- the exterior cover 85 has a sloped surface 86 below the opening 84 that slopes downward toward the inner side in the vehicle width direction.
- the vehicle width direction inner end portion 86a of the inclined surface 86 is located on the vehicle width direction inner side of the opening portion 84. As shown in FIG.
- a wire fixing portion 90 for fixing the wires 80 and 82 is provided on the front portion of the swing frame 20 .
- the wire fixing portion 90 is provided inside the arm portion 21a that constitutes the swing frame.
- the wire fixing portion 90 is fixed to the arm portion 21a by a fastening member such as a bolt. 5 to 7, illustration of the stand 28 (see FIG. 4) is omitted.
- the wire fixing portion 90 includes a tube locking portion 91 capable of locking a tube 81 covering the wire 80, and a wire connected to the upper end of the tube locking portion 91 and capable of locking a wire 82. and a locking portion 92 .
- Reference numeral 95 in the figure denotes a coupler for locking a harness 58 connected to a license plate light (not shown).
- reference numeral 99b denotes a bolt for fastening the cable stay 48 that supports the brake cable
- reference numeral 99c denotes a bolt for fastening the harness stay 49 that supports the harness 58
- reference numeral 99d denotes a bolt for fastening the outer case 24b to the inner case 24a (see FIG. 7). 2 are shown below.
- Each bolt 99b-99d is covered from the outside by an exterior cover 85 (see FIG. 4).
- reference numeral 60 indicates a pivot portion on which a pivot shaft 189 (see FIG. 9) is arranged.
- the pivot portion 60 is provided on the forward extending portion 21b of the arm portion 21a.
- the pivot portion 60 is not covered with an exterior cover 85 (see FIG. 4) and is exposed to the outside.
- reference numerals 78 and 79 indicate grommets for protecting and securing wires 80 and 82, respectively.
- the upper surface of the main arm 21 extending from the front extending portion 21b to the arm portion 21a extends obliquely rearward and upward.
- the portion 21c of the front portion of the main arm 21 that slopes rearward and upward will be referred to as a "rearward upward slope portion 21c".
- a battery 100 that supplies power to the motor 30 is mounted below the seat 8 (see FIG. 1).
- the battery 100 is composed of two front and rear unit batteries 101 and 102 .
- Each unit battery 101, 102 has the same configuration.
- Each unit battery 101, 102 has a rectangular parallelepiped shape with a square cross section and extending in the longitudinal direction.
- the unit batteries 101 and 102 are mobile batteries that are detachable from the vehicle body.
- the front and rear unit batteries 101 and 102 are inclined parallel to each other and arranged with a gap between the front and rear surfaces.
- the battery 100 generates a predetermined high voltage (48V to 72V, for example) by connecting a plurality of unit batteries 101 and 102 in series.
- each unit battery 101, 102 is composed of a lithium ion battery as a chargeable/dischargeable energy storage.
- Each unit battery 101, 102 is inserted into and removed from above each battery case 103, 104 fixed to the vehicle body (case support structure 110).
- a case support structure 110 that supports the battery cases 103 and 104 is attached to the vehicle body frame 11 .
- the battery cases 103 and 104 are provided with battery insertion/removal openings that open upward.
- the unit batteries 101 and 102 are accommodated in the battery cases 103 and 104 so as to be put in and taken out by obliquely sliding into the battery cases 103 and 104 from the battery insertion/removal openings.
- a part of the weight of the unit batteries 101 and 102 is supported by the walls of the battery cases 103 and 104 by obliquely inserting and removing the unit batteries 101 and 102 into and from the battery cases 103 and 104 .
- the unit battery 101 positioned on the front side is also referred to as the "front battery 101”
- the unit battery 102 positioned on the rear side is also referred to as the "rear battery 102”.
- the battery case 103 housing the front battery 101 is also referred to as the "front case 103”
- the battery case 104 housing the rear battery 102 is also referred to as the "rear case 104”.
- reference numeral 199 denotes a fender that covers the rear portion of the rear battery 102 from the outside in the vehicle width direction.
- the battery arrangement structure 100A includes a rear battery 102 arranged behind a front case 103 that houses a front battery 101, a pair of left and right rear upper frames 15L and 15R, a pair of left and right rear lower frames 16L and 16R, and a left and right rear frame.
- 106R a pair of left and right second upper brackets 107L, 107R projecting rearward and downward from the front portions of the left and right rear lower frames 16, and a pair of left and right battery support portions 108L extending rearward from lower portions of the left and right rear frame portions 145L, 145R. , 108R, and a power unit support structure 170 extending rearward from the rear lower portions of the left and right down frames 14L, 14R and supporting the power unit 10 in a swingable manner.
- a pair of left and right step support stays 135L and 135R for supporting pillion steps are provided below the left and right rear frame portions 145L and 145R.
- the power unit support structure 170 includes a pair of left and right lower brackets 171L and 171R provided along the rear lower bending portions 144L and 144R of the left and right down frames 14L and 14R, and left and right rear frame portions 145L and 145R.
- a pair of left and right rear extension portions 172L and 172R extending rearward from the lower side and a lower cross pipe 174 extending between the left and right lower brackets 171L and 171R in the vehicle width direction are provided.
- Each element of power unit support structure 170 constitutes link mechanism 19 .
- the lower bracket 171 includes a lower bracket body 177 that curves along the rear lower bent portion 144 of the down frame 14 , a downward projecting part 178 that projects downward from the front lower part of the lower bracket body 177 , and a rear upper part of the lower bracket body 177 . , a lower front protrusion 180 protruding forward from the lower protrusion 178 , and a lower rear extension 181 extending rearward from the lower protrusion 178 .
- the lower bracket 171 includes an inner bracket 171a positioned inside in the vehicle width direction, and an outer bracket 171b positioned outside the inner bracket 171a in the vehicle width direction.
- the inner bracket 171a and the outer bracket 171b are coupled at the downward protrusion 178 .
- the inner bracket 171a and the outer bracket 171b are separated from each other in the vehicle width direction.
- the rear extension 172 includes a boss 183 supported by the rear projection 179 of the lower bracket 171, an inclined extension 184 extending downward and rearward from the left and right bosses 183, A pair of left and right connection pipes 175L and 175R extending rearward from the lower cross pipe 174 are provided.
- the left and right boss portions 183L, 183R are located between the inner bracket 171a and the outer bracket 171b in the rearward projecting portions 179 of the left and right lower brackets 171L, 171R.
- the left and right oblique extensions 184L and 184R extend from the left and right bosses 183L and 183R so as to incline toward the inside in the vehicle width direction toward the rear, and then bend and extend rearward.
- a power unit supporting portion 173 that pivotally supports the power unit 10 is provided at the rear portion of the left and right rear extending portions 172L and 172R.
- the power unit support portion 173 includes a cross member 186 extending in the vehicle width direction, a pair of left and right rear extending brackets 187L and 187R extending rearward from the cross member 186, and a pair of brackets 187L and 187R extending rearward from the cross member 186 in the vehicle width direction. and an extending pivot support 188 .
- Both ends of the cross member 186 are located outside the rear ends of the left and right inclined extensions 184L and 184R in the vehicle width direction. Both ends of the cross member 186 are joined to the rear ends of the left and right inclined extensions 184L and 184R by welding or the like.
- the left and right rearwardly extending brackets 187L, 187R bridge the front and rear between the cross member 186 and the pivot shaft support portion 188.
- the left and right rearwardly extending brackets 187L and 187R extend frontward and rearward between the left and right forwardly extending portions 21b of the main arm 21 in the vehicle width direction.
- Front ends of the left and right rearwardly extending brackets 187L and 187R are joined to the cross member 186 by welding or the like.
- the rear end portions of the left and right rearwardly extending brackets 187L and 187R are joined to the pivot shaft support portion 188 by welding or the like.
- the left and right rearwardly extending brackets 187L, 187R are coupled to the vehicle width direction outer sides of the rear portions of the left and right connecting pipes 175L, 175R by welding or the like.
- the left and right rearwardly extending brackets 187L and 187R form rear portions of the left and right rearwardly extending portions 172L and 172R.
- the pivot shaft support portion 188 is rotatably supported on the pivot shaft 189 .
- the pivot shaft support portion 188 has a cylindrical shape extending in the vehicle width direction. 10, the pivot shaft supporting portion 188 is positioned between the left and right front extending portions 21b of the main arm 21 in the vehicle width direction.
- the lower cross pipe 174 extends between the downward protrusions 178 of the left and right lower brackets 171L and 171R in the vehicle width direction.
- a bolt 195 is inserted through a through hole (not shown) of the downward projecting portion 178 and into the lower cross pipe 174, the shaft portion of the bolt 195 is projected, and the projecting portion of the shaft portion is attached to the lower cross pipe.
- the lower cross pipe 174 can be fixed to the lower bracket 171 by screwing the nut 196 from the right side of the pipe 174 .
- the left and right connecting pipes 175L and 175R pass between the lower cross pipe 174 and the pivot shaft support 188 in the front and rear. 10, the left and right connecting pipes 175L and 175R extend linearly forward and backward between the lower cross pipe 174 and the pivot shaft support portion 188. As shown in FIG. Front ends of the left and right connecting pipes 175L and 175R are joined to the lower cross pipe 174 by welding or the like. The rear end portions of the left and right connecting pipes 175L and 175R are joined to the pivot shaft support portion 188 by welding or the like.
- reference numeral 111 denotes a first support frame that supports the front case 103
- reference numeral 112 denotes a second support frame that supports the rear case 104
- reference numeral 116 denotes a first cross extending below the front battery 101 in the vehicle width direction.
- 119L, 119R are a pair of left and right first lower support brackets extending rearward from the first cross pipe 116
- 122 is a second cross pipe extending in the vehicle width direction under the rear battery 102
- 125L; 125R denotes a pair of left and right second lower support brackets extending rearward from the second cross pipe 122, respectively.
- the motor 30 is connected to an electric wire 80 (hereinafter also referred to as an "electric cable 80").
- the electric cable 80 is a cable that electrically connects the power supply section on the body frame 11 side and each of the three-phase coils of the motor 30 .
- the electric cable 80 includes a bundle of three-phase electric wires 80u, 80v, and 80w.
- a bundle of three-phase electric wires 80u, 80v, and 80w is covered with a tube 81 as a protective material.
- the electric cable 80 is sufficiently thick because it is a bundle of three-phase electric wires 80u, 80v, and 80w.
- the maximum outer diameter of tube 81 is larger than the outer diameter of pivot shaft 189 .
- an electric cable 80 connected to the motor 30 passes through an opening 23h (see FIG. 7) provided in the power housing portion 23 of the swing arm 20 and passes forward through the inside of the arm portion 21a. pulled out towards.
- a power unit support structure 170 (hereinafter also referred to as "arm support member 170") projecting toward the rear of the vehicle is attached to the lower regions of the left and right rear frame portions 145L, 145R.
- a pivot shaft 189 that swingably supports the front portion of the swing arm 20 is held near the rear end portion of the arm support member 170 .
- the arm support member 170 is formed in a triangular shape in which one apex sandwiched between two sides protrudes toward the vehicle rear side.
- the pivot shaft 189 is held near the top projecting rearward of the vehicle.
- a wiring space 83 in which the electric cable 80 is laid is secured above the region spanning the arm support member 170 and the front region of the swing arm 20 .
- the cabling space 83 is a space surrounded by the arm support member 170 , the swing arm 20 , and the case support structure 110 .
- the rearwardly extending portion 172 (rearwardly downward inclined portion) of the arm support member 170 and the rearwardly upwardly inclined portion 21c of the front region of the swing arm 20 have a V-shaped concave shape when viewed from the side.
- a portion 89 is formed.
- the recessed portion 89 constitutes part of the cabling space 83 .
- a portion of the electric cable 80 is routed near the concave portion 89 .
- the electric cable 80 passes from the connecting portion with the motor 30 through the opening 23h (see FIG. 7) provided in the power housing portion 23 of the swing arm 20 and forward through the inside of the arm portion 21a. is pulled out towards As shown in FIG. 10 , the electric cable 80 pulled forward is bent rightward from the left position in the vehicle width direction near the upper left side of the pivot shaft 189 and pulled out forward at the right position in the vehicle width direction. there is As shown in FIG. 9, the electric cable 80 drawn forward is drawn out to a space on the front side of the rear frame portion 145 and connected to a control unit (not shown). 10, in the bottom view of FIG.
- a portion of the electric cable 80 that bends from the left to the right in the vehicle width direction on the front side of the swing arm 20 is the axis C1 of the pivot shaft 189 (hereinafter also referred to as the "pivot axis C1"). ) overlaps.
- a portion of the electric cable 80 that overlaps the pivot axis C1 in a bottom view is arranged in a wiring space 83 (see FIG. 9).
- a portion of the electric cable 80 that bends from the left side to the right side in the vehicle width direction on the front side of the swing arm 20 is supported below the case support structure 110 .
- a clamp component 80j that holds the electric cable 80 is attached to a portion of the electric cable 80 that straddles the lower portion of the front case 103 from left to right.
- the clamp component 80j is fastened to a cable support bracket 80k provided on the underside of the case support structure 110.
- the motor structure 30A of the above embodiment includes the motor 30 including the cylindrical inner rotor 32 and the stator 33 arranged on the outer periphery of the inner rotor 32, and the motor fixed to the inner rotor 32.
- an output shaft 31 a power housing portion 23 housing and holding the motor 30 on the output side of the motor output shaft 31, a case cover 25 having a surface 25f exposed to the outside and covering at least a portion of the motor 30; It has The stator 33 is fixed in contact with the power housing portion 23 and the case cover 25 respectively. According to this configuration, the heat of the stator 33 can be released through the power housing portion 23 and the case cover 25, respectively.
- the cooling performance of the stator 33 is improved as compared with the case where it is used.
- the heat of the stator 33 can be released through the surface 25f of the case cover 25 exposed to the outside.
- the number of parts does not increase. Therefore, the cooling performance of the stator 33 can be improved without increasing the number of parts.
- the motorcycle 1 of the embodiment described above includes the motor structure 30A described above.
- the power housing portion 23 is provided in the power unit 10 of the electric vehicle 1 .
- Motor output shaft 31 transmits rotation of motor 30 to drive wheels 4 of electric vehicle 1 . According to this configuration, since the motor structure 30A is provided, it is possible to provide the motorcycle 1 capable of improving the cooling performance of the stator 33 without increasing the number of parts.
- the stator 33 is arranged on the outer circumference of the inner rotor 32 . At least part of the stator 33 is exposed outside through the power housing portion 23 and the case cover 25 . According to this configuration, the outside air can be directly applied to the stator 33 arranged on the outer circumference of the inner rotor 32, so the cooling performance of the stator 33 is improved compared to the case where the stator is arranged on the inner circumference of the outer rotor. can be further improved.
- stator 33 is fastened together with the case cover 25 to the power housing portion 23 .
- the number of parts can be reduced compared to the case where the stator 33 and the case cover 25 are fastened with separate fastening members.
- the outer surface of the case cover 25 is provided with heat radiation fins 25a. According to this configuration, the heat transmitted from the stator 33 to the case cover 25 can be released through the heat radiation fins 25a on the outer surface of the case cover 25, so that the heat can be more effectively radiated.
- the case cover 25 has a wall surface 25b having a shape corresponding to the outer shape of the stator 33. As shown in FIG. The stator 33 is fixed in surface contact with the wall surface 25 b of the case cover 25 . According to this configuration, the heat of the stator 33 can be released through the wall surface of the case cover 25, so the cooling performance of the stator 33 is improved compared to the case where the stator 33 is fixed in point contact with the case cover 25. It can be improved further.
- the power housing portion 23 has an opening 23h that opens at a position facing the end surface 30f of the motor 30 in the axial direction.
- An electric wire 80 extending from the motor 30 is drawn out through the opening 23h of the power housing portion 23 .
- the outside air is not blocked by the electric wire 80, and it is possible to suppress deterioration of the cooling performance by the case cover 25.
- deterioration of appearance can be suppressed.
- the motorcycle 1 includes the motor structure 30A described above, the power storage unit 23 is provided in the power unit 10 of the electric vehicle 1, and the motor output shaft 31 rotates the motor 30 to drive the electric vehicle 1.
- the motorcycle 1 may not include the motor structure 30A described above.
- the motor structure 30A is not limited to the motorcycle 1, and may be applied to mobile bodies other than the motorcycle, electrical equipment, mechanical structures, equipment, and the like.
- the application of the motor structure 30A can be changed according to the required specifications.
- a motor structure includes a motor comprising a cylindrical rotor, a stator disposed on the inner or outer periphery of the rotor, a rotating shaft fixed to the rotor, and housing the motor on the output side of the rotating shaft.
- the stator may be fixed in contact with the case and the cover, respectively.
- stator 33 is arranged on the outer circumference of the inner rotor 32
- present invention is not limited to this.
- the stator may be arranged on the inner circumference of the outer rotor.
- the arrangement of the stator 33 and rotor 32 (motor type) can be changed according to the required specifications.
- stator 33 is exposed outside from the power housing portion 23 and the case cover 25, but the present invention is not limited to this.
- the stator 33 does not have to be exposed outside from the power housing portion 23 and the case cover 25 .
- the aspect of the stator 33 can be changed according to required specifications.
- stator 33 is fastened together with the case cover 25 to the power housing portion 23, but the present invention is not limited to this.
- the stator 33 and the case cover 25 may be fastened to the power housing portion 23 by separate fastening members.
- the fixing manner of the stator 33 can be changed according to required specifications.
- the present invention is not limited to this.
- the outer surface of the case cover 25 may not be provided with the heat radiation fins 25a.
- the aspect of the case cover 25 can be changed according to required specifications.
- the case cover 25 has a wall surface 25b having a shape corresponding to the outer shape of the stator 33.
- the present invention is not limited to this.
- the case cover 25 does not have to have the wall surface 25 b having a shape corresponding to the outer shape of the stator 33 .
- the aspect of the portion of the case cover 25 corresponding to the outer shape of the stator 33 can be changed according to the required specifications.
- stator 33 is fixed in surface contact with the wall surface 25b of the case cover 25, but the present invention is not limited to this.
- the stator 33 may be fixed in point contact with the case cover 25 .
- the fixing manner of the stator 33 can be changed according to required specifications.
- the power housing portion 23 has an opening 23h that opens at a position facing the end surface 30f of the motor 30 in the axial direction, but the present invention is not limited to this.
- the power housing portion 23 may not have an opening 23h that opens at a position facing the end surface 30f of the motor 30 in the axial direction.
- the opening 23h may open at a position different from the position facing the axial end face 30f of the motor 30 in the power housing portion 23 .
- the installation mode of the opening 23h can be changed according to the required specifications.
- the electric wire 80 extending from the motor 30 has been explained as an example in which it is pulled out through the opening 23h of the power housing portion 23, but it is not limited to this.
- the electric wire 80 extending from the motor 30 may be drawn outside without passing through the opening 23h of the power housing portion 23 .
- the electric wire 80 extending from the motor 30 may be pulled out along the vehicle width direction outer surface of the arm portion 21a.
- the arrangement of the electric wires 80 extending from the motor 30 can be changed according to the required specifications.
- the present invention is not limited to the above-described embodiments.
- the above-described electric 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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Abstract
Description
この構成によれば、ステータの熱をケース及びカバーのそれぞれを通じて逃がすことができるため、ステータがケース又はカバーのいずれか一方のみに接した状態で固定される場合と比較して、ステータの冷却性能が向上する。加えて、カバーにおいて外部に露出する面を通じてステータの熱を逃がすことができる。加えて、ステータを冷却する冷却装置を新たに設ける必要はないため、部品点数が増えることはない。したがって、部品点数を増やすことなく、ステータの冷却性能を向上させることができる。
この構成によれば、上記のモーター構造を備えるため、部品点数を増やすことなく、ステータの冷却性能を向上させることができる電動車両を提供することができる。
この構成によれば、ロータの外周に配置されるステータに外気を直に当てることができるため、ステータがロータの内周に配置される場合と比較して、ステータの冷却性能をより一層向上させることができる。
この構成によれば、ステータ及びカバーをそれぞれ別の締結部材で締める場合と比較して、部品点数を削減することができる。
この構成によれば、ステータからカバーに伝わった熱を、カバー外面の放熱フィンを通じて逃がすことができるため、より効果的に放熱することができる。
この構成によれば、ステータの熱をカバーの壁面を通じて逃がすことができるため、ステータがカバーに点接触した状態で固定される場合と比較して、ステータの冷却性能をより一層向上させることができる。
この構成によれば、カバーから電線を引き出す必要がないため、外気が電線に遮られることはなく、カバーによる冷却性が損なわれることを抑制することができる。加えて、カバーから電線を引き出した場合と比較して、外観性の低下を抑制することができる。
図1は、電動車両の一例としてのユニットスイング式の自動二輪車1を示す。図1を参照し、自動二輪車1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(駆動輪)とを備えている。以下、自動二輪車を単に「車両」ということがある。実施形態の自動二輪車1は、シート8に着座した乗員が足を載せるステップフロア9を有するスクータ型の車両である。
パワーユニット10は、後輪4の左側に配置された駆動源であるモーター30と、モーター30から得られる動力で後輪4を駆動可能な動力伝達機構35と、モーター30および動力伝達機構35を支持するスイングフレーム20と、を備えている。パワーユニット10は、モーター30、動力伝達機構35及びスイングフレーム20を一体化したスイング式動力ユニットである。
図2に示すように、パワーユニット10には、モーター構造30Aが設けられている。モーター構造30Aは、モーター30と、モーター30のインナーロータ32(ロータ)に固定されるモーター出力軸31(回転軸)と、モーター出力軸31の出力側でモーター30を収容して保持する動力収容部23と、外部に露出する面25fを有し、モーター30の少なくとも一部を覆うケースカバー25(カバー)と、を備えている。
モーター30は、後輪4の左側に配置されている。モーター30は、インナーロータ形式のモーターである。モーター30は、モーター出力軸31に固定された筒状のインナーロータ32と、インナーロータ32の外周に配置されたステータ33と、を備えている。
ケースカバー25は、モーター30を車幅方向外側から覆っている。ケースカバー25は、車幅方向内側に開放する箱状をなしている。ケースカバー25は、モーター軸線Cm1を中心とした有底筒状に形成されている。ケースカバー25は、ボルト25j(締結部材)によって動力収容部23と結合されている。
図2に示すように、伝達収容部24は、後輪4の左側において車幅方向内側に配置された内ケース24aと、内ケース24aを車幅方向外側から覆う外ケース24bと、を備えている。
外ケース24bは、車幅方向内側に開放する箱状をなしている。外ケース24bは、メインアーム21における動力収容部23と同一の部材で一体に形成されている。外ケース24bは、ボルト等の締結部材によって内ケース24aと結合されている。
図2に示すように、動力伝達機構35は、後輪4の左側に配置されている。動力伝達機構35は、動力収容部23に連なる伝達収容部24内に設けられている。
かかる構成により、モーター出力軸31の回転は所定の減速比にて減速され、後輪車軸4aに伝達される。
図示はしないが、制御ユニットは、モーター30を統括制御する。例えば、制御ユニットは、CPU(Central Processing Unit)、ROM(Read Only Memory)及びRAM(Random Access Memory)等を備えている。制御ユニットは、不図示のスロットル開度センサ等からの情報を受けて、モーター30のドライバに所定の制御信号を出力する。
図1に示すように、車両後方には、フェンダーステー40で、後輪4の後上方に配置されたフェンダー50を支持するフェンダー構造50Aが設けられている。実施形態において、フェンダー構造50Aは、フェンダー50の左側部のみがフェンダーステー40に固定された片持ち構造となっている。図1において、符号54はテールランプ、符号55はナンバープレート、符号57はリフレクタをそれぞれ示す。
図6に示すように、車両には、モーター30に向けて前後に延びる三相線80(電線)が設けられている。図7に示すように、三相線80の一端(後端)は、モーター30(図6参照)よりも車幅方向内側に位置する。モーター30は、三相線80を介して不図示のインバータユニットに電気的に接続されている。図7において、符号81は三相線80を被覆するチューブ、符号82は回転角度センサ33dに電気的に接続された配線(電線)をそれぞれ示す。電線80,82は、動力収容部23の開口部23hを通じて前方に延びている。配線82は、三相線80の上方を前後に延びている。
図8に示すように、モーター30の下方には、動力収容部23とケースカバー25とによって開口部84が設けられている。パワーユニット10には、開口部84を下方から覆うように、動力収容部23およびケースカバー25を外側から覆う外装カバー85が設けられている。
図5に示すように、スイングフレーム20の前部には、電線80,82を固定する電線固定部90が設けられている。電線固定部90は、スイングフレームを構成するアーム部21aの内部に設けられている。例えば、電線固定部90は、ボルト等の締結部材によってアーム部21aに固定されている。図5から図7においては、スタンド28(図4参照)の図示を省略している。
図7において、符号99bはブレーキケーブルを支持するケーブルステー48を締結するボルト、符号99cは、ハーネス58を支持するハーネスステー49を締結するボルト、符号99dは、外ケース24bを内ケース24a(図2参照)に締結するボルトをそれぞれ示す。各ボルト99b~99dは、外装カバー85(図4参照)によって外側から覆われている。
図7において、符号60は、ピボット軸189(図9参照)が配置されるピボット部を示す。ピボット部60は、アーム部21aの前方延出部21bに設けられている。ピボット部60は、外装カバー85(図4参照)によって覆われておらず、外部に露出している。
図7において、符号78,79の各々は、電線80,82の保護および固定用のグロメットをそれぞれ示す。
図9に示すように、シート8(図1参照)の下方には、モーター30に電力を供給するバッテリ100が搭載されている。バッテリ100は、前後2つの単位バッテリ101,102で構成されている。各単位バッテリ101,102は、互いに同一構成とされている。単位バッテリ101,102は、断面正方形状をなして長手方向に延びる直方体状をなしている。単位バッテリ101,102は、車体に対して着脱可能なモバイルバッテリである。前後の単位バッテリ101,102は、互いに平行に傾斜し、前後面間に間隔をあけて配置されている。
図9において、符号199は、後バッテリ102の後部を車幅方向外側から覆うフェンダーを示す。
車両の後部には、左右一対のリアフレーム140L,140Rと、左右リアフレーム140L,140Rの間に配置された後バッテリ102と、を備えるバッテリ配置構造100Aが設けられている。
図9に示すように、パワーユニット支持構造170は、左右ダウンフレーム14L,14Rにおける後下屈曲部144L,144Rに沿って設けられた左右一対のロアブラケット171L,171Rと、左右リアフレーム部145L,145Rの下側から後方に延びる左右一対の後方延出部172L,172Rと、左右ロアブラケット171L,171Rの車幅方向間を渡すロアクロスパイプ174と、を備える。パワーユニット支持構造170の各要素は、リンク機構19を構成する。
図10の下面視で、左右傾斜延出部184L,184Rは、左右ボス部183L,183Rから後側ほど車幅方向内側に位置するように傾斜して延びた後、後方に屈曲して延びている。
図9に示すように、モーター30には、電線80(以下「電気ケーブル80」ともいう。)が接続されている。電気ケーブル80は、車体フレーム11側の電力供給部と、モーター30の三相の各コイルとを電気的に接続するケーブルである。図12に示すように、電気ケーブル80は、三相の電線80u,80v,80wの束を備える。三相の電線80u,80v,80wの束の周囲は、保護材であるチューブ81によって被覆されている。
以上説明したように、上記実施形態のモーター構造30Aは、筒状のインナーロータ32と、インナーロータ32の外周に配置されるステータ33と、を備えるモーター30と、インナーロータ32に固定されるモーター出力軸31と、モーター出力軸31の出力側でモーター30を収容して保持する動力収容部23と、外部に露出する面25fを有し、モーター30の少なくとも一部を覆うケースカバー25と、を備えている。ステータ33は、動力収容部23及びケースカバー25のそれぞれに接した状態で固定されている。
この構成によれば、ステータ33の熱を動力収容部23及びケースカバー25のそれぞれを通じて逃がすことができるため、ステータ33が動力収容部23又はケースカバー25のいずれか一方のみに接した状態で固定される場合と比較して、ステータ33の冷却性能が向上する。加えて、ケースカバー25において外部に露出する面25fを通じてステータ33の熱を逃がすことができる。加えて、ステータ33を冷却する冷却装置を新たに設ける必要はないため、部品点数が増えることはない。したがって、部品点数を増やすことなく、ステータ33の冷却性能を向上させることができる。
この構成によれば、上記のモーター構造30Aを備えるため、部品点数を増やすことなく、ステータ33の冷却性能を向上させることができる自動二輪車1を提供することができる。
この構成によれば、インナーロータ32の外周に配置されるステータ33に外気を直に当てることができるため、ステータがアウターロータの内周に配置される場合と比較して、ステータ33の冷却性能をより一層向上させることができる。
この構成によれば、ステータ33及びケースカバー25をそれぞれ別の締結部材で締める場合と比較して、部品点数を削減することができる。
この構成によれば、ステータ33からケースカバー25に伝わった熱を、ケースカバー25外面の放熱フィン25aを通じて逃がすことができるため、より効果的に放熱することができる。
この構成によれば、ステータ33の熱をケースカバー25の壁面を通じて逃がすことができるため、ステータ33がケースカバー25に点接触した状態で固定される場合と比較して、ステータ33の冷却性能をより一層向上させることができる。
この構成によれば、ケースカバー25から電線80を引き出す必要がないため、外気が電線80に遮られることはなく、ケースカバー25による冷却性が損なわれることを抑制することができる。加えて、ケースカバー25から電線80を引き出した場合と比較して、外観性の低下を抑制することができる。
上記実施形態では、自動二輪車1は、上記のモーター構造30Aを備え、動力収容部23は、電動車両1のパワーユニット10に設けられ、モーター出力軸31は、モーター30の回転を電動車両1の駆動輪4に伝達する例を挙げて説明したが、これに限らない。例えば、自動二輪車1は、上記のモーター構造30Aを備えていなくてもよい。例えば、モーター構造30Aは、自動二輪車1に限らず、自動二輪車以外の移動体や電気機器、機械構造、設備などに適用してもよい。例えば、モーター構造30Aの適用態様は、要求仕様に応じて変更することができる。
例えば、モーター構造は、筒状のロータと、ロータの内周または外周に配置されるステータと、を備えるモーターと、ロータに固定される回転軸と、回転軸の出力側でモーターを収容して保持するケースと、外部に露出する面を有し、モーターの少なくとも一部を覆うカバーと、を備えたモーター構造において、ステータは、ケース及びカバーのそれぞれに接した状態で固定されていればよい。
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。
4 後輪(駆動輪)
10 パワーユニット
23 動力収容部(ケース)
23h 開口部
25 カバー
25a 放熱フィン
25b 壁面
25f 外部に露出する面
30 モーター
30A モーター構造
30f 端面
31 モーター出力軸(回転軸)
32 ロータ
33 ステータ
80 三相線(電線)
82 配線(電線)
Claims (7)
- 筒状のロータ(32)と、前記ロータ(32)の内周または外周に配置されるステータ(33)と、を備えるモーター(30)と、
前記ロータ(32)に固定される回転軸(31)と、
前記回転軸(31)の出力側で前記モーター(30)を収容して保持するケース(23)と、
外部に露出する面(25f)を有し、前記モーター(30)の少なくとも一部を覆うカバー(25)と、を備えたモーター構造(30A)において、
前記ステータ(33)は、前記ケース(23)及び前記カバー(25)のそれぞれに接した状態で固定されるモーター構造。 - 請求項1に記載のモーター構造(30A)を備え、
前記ケース(23)は、電動車両(1)のパワーユニット(10)に設けられ、
前記回転軸(31)は、前記モーター(30)の回転を前記電動車両(1)の駆動輪(4)に伝達する
電動車両。 - 前記ステータ(33)は、前記ロータ(32)の外周に配置され、
前記ステータ(33)の少なくとも一部は、前記ケース(23)及び前記カバー(25)から外部に露出する
請求項2に記載の電動車両。 - 前記ステータ(33)は、前記ケース(23)に対して前記カバー(25)と共締めされる
請求項2又は3に記載の電動車両。 - 前記カバー(25)の外面には、放熱フィン(25a)が設けられる
請求項2から4の何れか一項に記載の電動車両。 - 前記カバー(25)は、前記ステータ(33)の外形に対応する形状を有する壁面(25b)を備え、
前記ステータ(33)は、前記カバー(25)の前記壁面(25b)に面接触した状態で固定される
請求項2から5の何れか一項に記載の電動車両。 - 前記ケース(23)は、前記モーター(30)の軸方向の端面(30f)と対向する位置で開口する開口部(23h)を有し、
前記モーター(30)から延びる電線(80)は、前記ケース(23)の前記開口部(23h)を通じて外部に引き出される
請求項2から6の何れか一項に記載の電動車両。
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- 2021-03-31 CN CN202190001004.5U patent/CN220934971U/zh active Active
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JPH0614489A (ja) * | 1992-06-25 | 1994-01-21 | Japan Servo Co Ltd | 電動機の口出し装置 |
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