Saddle-type electric vehicle

Abstract

The present invention provides a saddle-ride type electric vehicle, which can suppress the load acting on the motor wiring when the swing arm swings even if the power supply unit is arranged at a position close to the motor. In the saddle-ride type electric vehicle (10), the power supply unit (100) is installed around the swing shaft (33) of the frame (11), and the swing arm (16) has: a wiring accommodating portion (16a) for passing the motor wiring (12L1) extending from the motor (12); a wall portion (16w) located at a position forward of the wiring accommodating portion; and an opening portion (16k) located above the wall portion for passing the motor wiring, and the motor wiring has a portion extending from the opening portion through the bottom of the swing shaft toward the power supply unit (100) and having: a front-to-back direction layout portion (12La) arranged along the front-to-back direction of the vehicle body; and a vehicle width direction layout portion (12Lb) connected to the front-to-back direction layout portion and arranged along the vehicle width direction.

Description

Technical Field

[0001] The present invention relates to a saddle-riding type electric vehicle. Background Art

[0002] In recent years, efforts towards the realization of a low-carbon society or a decarbonized society have been actively pursued, and research and development of saddle-riding type electric vehicles are being conducted in order to reduce CO2 emissions and improve energy efficiency in vehicles as well.

[0003] In such a vehicle, the following structure is known, which includes: a frame having a swing shaft that supports a swing arm that supports a rear wheel so that it can swing; a motor that is mounted on the swing arm and drives the rear wheel; a power drive unit (PDU) that functions as a power supply unit that supplies power to the motor; and a three-phase electric wire that electrically connects the PDU and the motor (for example, Patent Document 1). In the technology described in Patent Document 1, the power supply unit is mounted on the frame at a height substantially the same as that of the motor, and the motor wiring consisting of the three-phase electric wire is laid within the upper and lower widths of the motor.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6864108 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in the conventional structure, when the power supply unit is arranged around the swing shaft which is close to the motor, the motor wiring between the power supply unit and the motor is short. Therefore, the motor wiring is greatly bent as the swing arm swings, and the load acting on the motor wiring may become excessive.

[0009] The present invention has been made in view of the above circumstances, and its object is to suppress the load acting on the motor wiring when the swing arm swings, even if the power supply unit is arranged at a position close to the motor, and further contribute to the improvement of energy efficiency.

[0010] Means for solving problems

[0011] The present invention provides a saddle-riding electric vehicle, which comprises: a frame, which has a swing axis that supports a swing arm supporting a rear wheel so as to be swingable; a motor, which is installed on the swing arm and drives the rear wheel; a power supply unit, which is installed on the frame and supplies power to the motor; and a motor wiring, which electrically connects the power supply unit with the motor, wherein the power supply unit is installed around the swing axis of the frame, and the swing arm has: a wiring accommodating portion for passing the motor wiring; a wall portion located at a position forward of the wiring accommodating portion; and an opening portion located above the wall portion and for passing the motor wiring, wherein a portion of the motor wiring that extends from the opening portion through the bottom of the swing axis and toward the power supply unit has: a front-to-back direction layout portion, which is laid along the front-to-back direction of the vehicle body; and a vehicle width direction layout portion, which is connected to the front-to-back direction layout portion and is laid along the vehicle width direction.

[0012] Effects of the Invention

[0013] Even if the power supply unit is arranged at a position close to the motor, it is possible to suppress the load acting on the motor wiring when the swing arm swings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side view of the saddle-ride type vehicle according to the embodiment of the present invention.

[0015] Figure 2 It is a side view showing the frame together with the swing arm.

[0016] Figure 3 This is a view showing the vehicle frame from the rear.

[0017] Figure 4 It is a three-dimensional diagram of the swing arm.

[0018] Figure 5 yes Figure 1 Cross-sectional view of the swing arm on section AA.

[0019] Figure 6 This is a diagram showing the motor cut along a plane perpendicular to the motor axis and the surrounding structure.

[0020] Figure 7 Yes Figure 2 FIG. BB is a diagram showing a cross-section of the speed reduction mechanism accommodation chamber together with the surrounding structure.

[0021] Figure 8 This is a diagram showing a state where a motor cover is removed from a swing arm together with the surrounding structure.

[0022] Fig. 9 This diagram shows the motor wiring between the PDU and the swing arm together with the surrounding structure.

[0023] Fig.10 Yes means Fig. 9 Diagram of the XX section.

[0024] Fig.11 Yes means Fig. 9 Figure 1 is a diagram of the XI-XI section.

[0025] Fig.12 It is a diagram showing a layout structure of a motor drive line according to a modified example.

[0026] Description of symbols

[0027] 10: Saddle-riding vehicles;

[0028] 11: frame;

[0029] 12: Motor;

[0030] 12a: motor shaft;

[0031] 12L1: Motor drive line (motor wiring);

[0032] 12L2: Cabling;

[0033] 12La: front and rear layout part;

[0034] 12Lb: vehicle width direction layout part;

[0035] 12Lc: vertical layout part;

[0036] 13: front wheel;

[0037] 15: rear wheel;

[0038] 16: swing arm (driving device);

[0039] 16a: wiring receiving portion;

[0040] 16w: wall;

[0041] 16w1: first face;

[0042] 16w2: Second face;

[0043] 16k: opening;

[0044] 31: Subframe;

[0045] 32: pivot part;

[0046] 33: pivot (swing axis);

[0047] 100: PDU (power supply unit);

[0048] 101: a first clamp (a first supporting portion);

[0049] 102, 104: fastening components;

[0050] 103: second fixture (second supporting portion);

[0051] 105: The third clamp (the portion arranged in the vehicle width direction). DETAILED DESCRIPTION

[0052] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description, unless otherwise specified, the description of directions such as front, back, left, right, and up and down is the same as the direction relative to the vehicle body. In addition, the symbol "FR" shown in each figure indicates the front of the vehicle body, the symbol "UP" indicates the top of the vehicle body, and the symbol "LH" indicates the left of the vehicle body.

[0054] Figure 1 It is a side view of the saddle-ride type vehicle 10 according to the embodiment of the present invention.

[0055] The saddle-ride type vehicle 10 is an electric two-wheeled motor vehicle having the following parts: a frame 11, a motor 12 that drives a rear wheel 15 as a driving wheel, a front fork 14 that supports a front wheel 13 so that it can be steered freely, a swing arm 16 that supports the rear wheel 15, a seat 17 for a passenger, and a body cover 18 that covers the frame 11.

[0056] The saddle-ride type vehicle 10 is a vehicle in which a passenger sits astride on a seat 17. The saddle-ride type vehicle 10 of the present embodiment is a pedal-type electric two-wheeled vehicle having a low footboard 19, a side stand 20a, and a center stand 20b, and is a type of saddle-ride type electric vehicle.

[0057] Figure 2 It is a side view showing the vehicle frame 11 together with the swing arm 16 . Figure 3 1 is a view showing the vehicle frame 11 from the rear. Figure 3 , the symbol “LC” represents the vehicle width center of the saddle-ride type vehicle 10 .

[0058] like Figure 2 and Figure 3 As shown, the vehicle frame 11 includes: a front stand pipe 21 provided at the front of the vehicle body; a lower frame 22 extending rearward and downward from the front stand pipe 21; a bottom frame 23 extending rearward from the bottom frame 22; and left and right rear frames 24 extending rearward and upward from the bottom frame 23. Figure 1 The footrest 19 shown is supported above the bottom frame 23 and is used for a passenger seated on the seat 17 to place their feet.

[0059] The side stand 20a is rotatably supported on the left lower portion of the vehicle frame 11, and by contacting the ground in an upright state, the saddle-riding type vehicle 10 can be parked in a state in which it is tilted to the left. Figure 1As shown, the center stand 20b is rotatably supported by the swing arm 16 behind the side stand 20a and in front of the rear wheel 15, and by contacting the ground in the upright state, the saddle-riding type vehicle 10 can be parked in an upright state without tilting to the left or right. In addition, the center stand 20b is also called a main stand.

[0060] The front fork 14 is supported by the front seat tube 21 so as to be steerable to the left and right. The front wheel 13 is supported by a front wheel shaft 13a, which is composed of an axle provided at the lower end of the front fork 14. A steering handle 25 for a rider to hold is mounted on the upper end of the front fork 14.

[0061] like Figure 2 As shown, the left and right pivot parts 32 are supported on the left and right rear frames 24 via the subframe 31. The left and right pivot parts 32 support the swing arm 16 via the pivot 33 so as to swing freely up and down. The swing arm 16 has a hollow structure and accommodates the motor 12 for driving the rear wheel 15 at a position corresponding to the left side of the rear wheel 15. That is, the swing arm 16 not only functions as a supporting member for supporting the rear wheel 15, but also functions as a driving device for driving the rear wheel 15. The swing arm 16 can also be called a swing-type power unit. A rear shock absorber 26 is interposed between the rear end of the swing arm 16 and the rear frame 24.

[0062] in addition, Figure 2 The reference numeral “PM” shown in the following figures indicates the axis of the motor shaft 12 a , the reference numeral “PR” indicates the axis of the rear wheel shaft 15 a , and the reference numeral “PC” indicates the axis of the intermediate shaft 71 constituting a part of the speed reduction mechanism of the motor 12 .

[0063] The subframe 31 is a frame constituting a part of the vehicle frame 11. The subframe 31 includes left and right first frame portions 31a extending rearward from the left and right rear frames 24, a cross pipe 31b bridging the rear end portions of the left and right first frame portions 31a, and a second frame portion 31c connecting the cross pipe 31b to the rear lower portions of the left and right rear frames 24. The left and right pivot portions 32 are supported by the cross pipe 31b.

[0064] exist Figure 3 In the rear view of the vehicle shown, the second frame portion 31c is formed into an inverted V-shaped frame extending from the bottom surface of the cross pipe 31b downward to the left and right. A power drive unit 100 (hereinafter referred to as PDU 100) that supplies power to the motor 12 is arranged in the space surrounded by the subframe 31.

[0065] The PDU 100 is disposed in a space surrounded by the subframe 31, so that Figure 1As shown, the PDU 100 is located in front of the vehicle body relative to the position PP of the pivot 33 and behind the position PS of the front end 17F of the seat 17. Thus, the PDU 100 is arranged near the motor 12, i.e., around the pivot 33. In the present structure, the PDU 100 is arranged in the front and lower part of the pivot 33, and more specifically, in the front and lower part of the pivot 33 and behind the rear frame 24. According to the present structure, the PDU 100 can be protected by the sub-frame 31. In addition, the PDU 100 is located in the front and rear center of the vehicle body and in the lower part of the vehicle body, which is conducive to the so-called mass centralization and the appropriateness of the center of gravity.

[0066] The position of the PDU 100 is not limited to the lower front position of the pivot 33, but may be changed to an appropriate position around the pivot 33. The PDU 100 is not limited to being arranged in the subframe 31, and a wide range of known PDU arrangement structures can be applied.

[0067] Figure 4 It is a perspective view of the swing arm 16. Figure 5 yes Figure 1 A cross-sectional view of the swing arm 16 on section AA.

[0068] like Figure 4 and Figure 5 As shown in FIG. 1 , the swing arm 16 has a shape extending from the front of the rear wheel 15 in a curved manner toward the left side of the rear wheel 15. Figure 4 As shown, a pivot insertion portion 41 for connecting to the vehicle frame 11 is provided at the front end of the swing arm 16 , and the motor 12 is accommodated at the left rear portion of the swing arm 16 .

[0069] like Figure 4 As shown in FIG. 1 , the swing arm 16 includes a motor housing 42, a gear housing 43 located inside the motor housing 42 in the vehicle width direction, and a motor cover 44 located outside the motor housing 42 in the vehicle width direction. Figure 5 As shown, a motor housing chamber 46 for housing the motor 12 is formed between the motor housing 42 and the motor cover 44 , and a speed reduction mechanism housing chamber 47 for housing the speed reduction mechanism of the motor 12 is formed between the motor housing 42 and the gear housing 43 .

[0070] The motor housing 42 constitutes the majority of the swing arm 16, and integrally includes: a plate-like side wall 51 extending in the front-rear and up-down directions, a cylindrical peripheral member 52 extending outward in the vehicle width direction from the side wall 51, and protruding portions 53 and 54 protruding rearward from the side wall 51 and the peripheral member 52 ( Figure 4 The side wall 51 constitutes an outer wall exposed on the inner side in the vehicle width direction of the swing arm 16 , and the above-mentioned pivot insertion portion 41 is integrally provided at the front portion of the side wall 51 .

[0071] The cylindrical outer peripheral member 52 of the motor housing 42 constitutes a part of the upper plate and the bottom plate of the swing arm 16. A plurality of internal threads are provided on the left side of the outer peripheral member 52, and the plurality of internal threads constitute a part of a plurality of connection parts 60 connecting the motor housing 42 and the motor cover 44. Figure 4 As shown, the plurality of connection parts 60 are inserted through the fastening member 60 t from the vehicle width direction outer side (left side) of the motor cover 44 and are fastened to the internal threaded parts of the motor case 42 , respectively, thereby connecting the motor case 42 and the motor cover 44 .

[0072] A breather box 70 is attached to the upper and right side portion of the outer peripheral member 52. In the present embodiment, the motor housing 42, the gear housing 43, and the motor cover 44 are made of metal, but may be made of materials other than metal.

[0073] like Figure 5 As shown, the side wall 51 of the motor housing 42 extends between the motor accommodating chamber 46 and the speed reduction mechanism accommodating chamber 47 , and thus the side wall 51 functions as a partition wall that partitions the motor accommodating chamber 46 and the speed reduction mechanism accommodating chamber 47 .

[0074] The side wall 51 is integrally provided with a motor support portion 55 that protrudes outward in the vehicle width direction in the motor accommodation chamber 46. The motor 12 is supported by the motor support portion 55. The motor 12 includes a motor shaft 12a ( Figure 6 ), a rotor 12r that rotates integrally with the motor shaft 12a, and a stator 12s located on the outer periphery of the rotor 12r. The motor 12 is an electric motor that uses a three-phase AC as a power source, and is called a three-phase motor or the like.

[0075] The motor 12 is mounted at a position away from the side wall 51 in the vehicle width direction outside by the motor support portion 55. Thus, a layout space is formed between the motor 12 and the side wall 51, and a plurality of (3) motor drive wires 12L1, which are relatively thick wires among a plurality of wires connected to the motor 12, are laid in the layout space.

[0076] The side wall 51 is also integrally provided with a partition wall 56 that partitions the internal space of the motor housing 42 into the motor accommodation chamber 46 and other spaces. The partition wall 56 protrudes in the vehicle width direction at a position forward of the motor 12 and extends to a position abutting against the motor cover 44.

[0077] The motor cover 44 is connected to the motor case 42 from the outside in the vehicle width direction, and functions as a cover member that covers the motor accommodation chamber 46 in the motor case 42 from the outside in the vehicle width direction. The motor accommodation chamber 46 is formed as a chamber closed from the outside space by the motor case 42 and the motor cover 44 including the partition wall 56.

[0078] The area of ​​the motor case 42 that is not covered by the motor cover 44 is covered by the swing arm cover 45 from the outer side in the vehicle width direction.

[0079] The motor cover 44 has a certain width in the vehicle width direction, and the internal space of the motor cover 44 also forms a part of the motor accommodation chamber 46. The motor 12 is separated from the motor cover 44 in the vehicle width direction, thereby forming a wiring 12L2 (excluding the motor drive line 12L1) for connecting the plurality of wirings connected to the motor 12. Figure 5 ) through which the layout space is passed.

[0080] The wiring 12L2 is connected to an angle sensor for detecting the rotation angle of the motor 12. However, the wiring 12L2 is not limited to the wiring connected to the angle sensor, and any wiring connected to any sensor or the like for detecting information of the motor 12 may be used. In this way, the layout space for the wirings 12L1 and 12L2 connected to the motor 12 is ensured on the inner side and the outer side of the motor 12 in the vehicle width direction, respectively.

[0081] The gear housing 43 is connected to the motor housing 42 from the inside in the vehicle width direction and has a speed reduction mechanism accommodation chamber 47 between the gear housing 43 and the side wall 51 of the motor housing 42. The speed reduction mechanism accommodation chamber 47 is surrounded by the gear housing 43 and the motor housing 42 and is sealed from the outside.

[0082] Figure 6 This is a diagram showing the motor 12 cut along a plane perpendicular to the motor shaft 12 a and showing the motor 12 together with the surrounding structure.

[0083] like Figure 6 As shown, two wiring insertion holes 56a and 56b for passing a plurality of motor drive wires 12L1 are formed in the partition wall 56. A wire sheath 80 made of a rubber cylindrical member is installed in each wiring insertion hole 56a and 56b. Each motor drive wire 12L1 is supported by the partition wall 56 by passing through the central hole of each wire sheath 80. Since the wire sheath 80 is interposed between each wiring insertion hole 56a and 56b and the motor drive wire 12L1, the airtightness of the motor accommodation chamber 46 can be improved, and moisture, dust, etc. can be prevented from entering the motor accommodation chamber 46.

[0084] In addition, the motor drive line 12L1 is an example of the "motor wiring" of the present invention, and the cable sheath 80 is an example of the "clamping member" of the present invention. The clamping member of the present invention is not limited to the cable sheath 80, and can be widely applied to a member that can fill the gap between the wiring insertion holes 56a, 56b and the motor drive line 12L1. In addition, the PDU 100 is an example of the "power supply unit" of the present invention, and the pivot 33 is an example of the "swinging shaft" of the present invention.

[0085] Figure 7Yes Figure 2 The figure shows the speed reduction mechanism accommodating chamber 47 together with the surrounding structure on the BB section of FIG. The BB section is a section passing through the axis PM of the motor shaft 12a, the axis PC of the intermediate shaft 71, and the axis PR of the rear wheel shaft 15a.

[0086] like Figure 7 As shown, in the speed reduction mechanism accommodation chamber 47, an intermediate shaft 71 and an output shaft also serving as the rear wheel shaft 15a are supported in parallel with the motor shaft 12a and rotatably. The motor shaft 12a is the rotating shaft of the motor 12, passes through the side wall 51 of the motor housing 42, and has a first gear 12a1 that rotates integrally with the motor shaft 12a in the speed reduction mechanism accommodation chamber 47. The intermediate shaft 71 has: a second gear 71a1 with a large diameter, which meshes with the first gear 12a1; and a third gear 71a2 with a small diameter, which rotates integrally with the second gear 71a1. The rear wheel shaft 15a has a fourth gear 15a1 with a large diameter that meshes with the third gear 71a2. By appropriately setting the number of teeth of each gear 12a1, 71a1, 71a2 and 15a1, etc., a speed reduction mechanism is formed that reduces the rotation of the motor 12 at a predetermined speed reduction ratio and transmits it to the rear wheel shaft 15a.

[0087] The motor housing 42 is a housing located between the gear housing 43 and the motor cover 44 and located in the left and right center of the swing arm 16, and therefore can also be called a center housing. The gear housing 43 constitutes the right side portion of the swing arm 16, and therefore can also be called a right housing and a left and right side housing. The motor cover 44 constitutes the left side portion of the swing arm 16, and therefore can also be called a left housing and a left and right side housing.

[0088] like Figure 4 As shown, a plurality of (four in this structure) fastening members 61t are fastened to the side wall 51 of the motor housing 42 from the inner side (right side) in the vehicle width direction. The area where these fastening members 61t are fastened is an area that avoids the speed reduction mechanism accommodation chamber 47 in the area overlapping with the motor 12 when viewed in the width direction. The fastening structure of these fastening members 61t is the same structure, as shown in FIG. Figure 7 As shown, there is a screw insertion portion 61s provided in the gear housing 43 and an internal thread portion 61m provided in the motor housing 42. Each fastening member 61t is respectively inserted into the screw insertion portion 61s and fastened to the internal thread portion 61m, thereby fastening the gear housing 43 and the motor housing 42.

[0089] That is, the fastening member 61 t , the screw insertion portion 61 s , and the internal thread portion 61 m function as a first fastening portion 61 that fastens the gear housing 43 and the motor housing 42 from the inner side in the vehicle width direction.

[0090] The first fastening portion 61 is configured to fasten the fastening member 61t from the opposite side of the motor 12, that is, from the right side in the vehicle width direction, so the fastening member 61t can be removed without removing the motor 12. Since the motor 12 does not need to be removed, it is easier to remove the gear housing 43 from the motor housing 42, or in other words, it is easier to release the fastened state of the gear housing 43 and the motor housing 42.

[0091] like Figure 7 As shown, the fastening member 61t of the first fastening portion 61 is a stud bolt 61a and a cap nut 61b. The stud bolt 61a is also called an embedded bolt and has external threads at both ends, one of which is fastened to the internal thread 61m of the motor housing 42.

[0092] The external threaded portion of the tip end side of the stud bolt 61a is fastened to the motor housing 42, and after the stud bolt 61a is passed through the screw insertion portion 61s of the gear housing 43, the nut 61b is fastened to the external threaded portion of the base end side exposed to the outside from the screw insertion portion 61s. According to this fastening structure, there is an advantage that even if the nut 61b is loosened, the stud bolt 61a will not be loosened, and the first fastening portion 61 can be prevented from moving significantly to the inner side in the vehicle width direction, that is, to the rear wheel 15 side.

[0093] like Figure 2 As shown, the motor housing 42 is provided with protruding portions 53, 54 that protrude rearward relative to the motor cover 44 and overlap the gear housing 43 in the vehicle width direction. A plurality of (three in this embodiment) fastening members 62t are fastened to the protruding portions 53, 54 from the vehicle width direction outer side (left side).

[0094] The fastening structures of these fastening members 62t are the same and are similar to those of Figure 7 The gear housing 43 has a screw insertion portion 62s provided in the motor housing 42 and an internal thread portion 62m provided in the gear housing 43. Each fastening member 62t is inserted into the screw insertion portion 62s and fastened to the internal thread portion 62m, thereby fastening the gear housing 43 to the motor housing 42.

[0095] The fastening member 62t is a bolt having an external threaded portion at one end and a large-diameter head at the other end, such as a flange bolt. The fastening member 62t, the screw insertion portion 62s, and the internal threaded portion 62m function as a second fastening portion 62 for fastening the gear housing 43 and the motor housing 42 from the outside in the vehicle width direction.

[0096] The second fastening portion 62 is provided at a position away from the motor 12, so the fastening member 62t can be removed without removing the motor 12. Since the motor 12 does not need to be removed, it is easy to remove the gear housing 43 from the motor housing 42, that is, to release the fastened state between the gear housing 43 and the motor housing 42.

[0097] Next, the wiring structure of the motor drive wire 12L1 will be described.

[0098] Figure 8 This figure shows a state where the motor cover 44 is removed from the swing arm 16 together with the surrounding structure. Fig. 9 This is a diagram showing the motor drive line 12L1 between the PDU 100 and the swing arm 16 together with the surrounding structure.

[0099] like Figure 8 and Fig. 9 As shown, the swing arm 16 has: a wiring accommodating portion 16a, through which the motor drive line 12L1 passes; a wall portion 16w, which is located in front of the wiring accommodating portion 16a; and an opening portion 16k ( Fig. 9 ), which is located above the wall portion 16w and opens forward. Fig. 9 As shown, the motor drive line 12L1 extends forward from the wiring accommodating portion 16a, passes through the opening 16k, and is exposed in front of the swing arm 16. The opening 16k is opened in the front-rear direction just below the pivot 33, so the motor drive line 12L1 passes under the pivot 33 and is connected to the PDU 100. The wall portion 16w is fixed to the swing arm 16, and is formed of a plate having an L-shape when the vehicle body is viewed from the side.

[0100] Fig.10 Yes means Fig. 9 Diagram of the XX section. Fig.10 The symbol SL in denoted the lower edge of the opening 16 k , the symbol SU denoted the upper edge of the opening 16 k , and the symbol SS denoted the left and right side edges of the opening 16 k .

[0101] like Fig.10 As shown, the wall portion 16w integrally includes: a first surface portion 16w1 extending vertically and horizontally toward the vehicle body below the opening portion 16k; and a second surface portion 16w2 extending in a direction intersecting the first surface portion 16w1 (the front-rear direction of the vehicle body) at the upper end of the first surface portion 16w1. The second surface portion 16w2 has an upper surface extending vertically and horizontally toward the vehicle body, and a first clamp 101 supporting the motor drive wire 12L1 is fixed to the upper surface.

[0102] The first clamp 101 supports the motor drive wire 12L1 along the second surface 16w2 toward the front and the outside in the vehicle width direction (the right side of the vehicle body). In addition, the first clamp 101 supports the motor drive wire 12L1 at an upper position slightly away from the second surface 16w2, thereby easily avoiding direct contact between the second surface 16w2 and the motor drive wire 12L1.

[0103] In this structure, if Fig.10 As shown, the motor drive wire 12L1 is routed by the first clamp 101 so as to extend from the swing arm 16 to the opposite right side, that is, the right side of the vehicle body, across the vehicle width center LC, and extend forward from the opening 16k.

[0104] Here, the first clamp 101 is fixed to the wall portion 16w (equivalent to the swing arm 16 side) by the fastening member 102. Therefore, the direction and position of the motor drive wire 12L1 can be set with the wall portion 16w as a reference. As a result, it is easy to arrange the motor drive wire 12L1 along the second surface portion 16w2 without contacting the wall portion 16w. In addition, even if the swing arm 16 swings or the motor drive wire 12L1 vibrates, it is easy to set the direction and position in a manner that the motor drive wire 12L1 does not contact the wall portion 16w, etc.

[0105] In addition, the fastening member 102 that fixes the first clamp 101 to the wall portion 16w is fastened to the wall portion 16w from above relative to the wall portion 16w. Therefore, the fastening member 102 is exposed above the wall portion 16w and in front of the opening portion 16k, and the fastening member 102 can be easily accessed from the outside. Therefore, the loading and unloading operation of the first clamp 101 is easy. In addition, since the motor drive line 12L1 is led out from the opening portion 16k opened to the front, the state of the motor drive line 12L1 can be easily visually confirmed from the outside.

[0106] like Fig. 9 As shown, the second surface 16w2 is inclined forward and downward, and the motor drive line 12L1 is arranged in a manner extending forward and downward along the second surface 16w2. The portion 12La of the motor drive line 12L1 extending forward and downward along the second surface 16w2 is equivalent to the portion arranged in the front-to-back direction of the motor drive line 12L1, which is hereinafter referred to as the front-to-back direction arrangement portion 12La.

[0107] In this structure, the front-to-back direction layout part 12La is arranged to extend in a manner of being lower in the front and higher in the rear through the opening part 16k which is vacant below the pivot 33 and above the wall part 16w. Therefore, corresponding to making the front-to-back direction layout part 12La lower in the front and higher in the rear, the front-to-back direction layout part 12La can be lengthened, and can be arranged so as not to contact the surrounding parts such as the pivot 33.

[0108] like Fig. 9As shown, the front-rear direction routing portion 12La extends forward to a position overlapping with the rear lower portion of the sub-frame 31 (corresponding to a portion of the second frame portion 31c) when the vehicle body is viewed from the side. The motor drive line 12L1 has a portion 12Lb extending from the front end of the front-rear direction routing portion 12La in the vehicle width direction. This portion 12Lb corresponds to the portion of the motor drive line 12L1 routed in the vehicle width direction, and is hereinafter referred to as the vehicle width direction routing portion 12Lb.

[0109] Fig.11 Yes means Fig. 9 Figure 1 is a diagram of the XI-XI section.

[0110] like Fig.11 As shown, the vehicle width direction layout portion 12Lb extends from one side in the vehicle width direction, i.e., the right side of the vehicle body, toward the other side in the vehicle width direction, i.e., the left side of the vehicle body, between the second frame portion 31c formed by the inverted V-shaped frame constituting the rear lower portion of the subframe 31. A portion of the vehicle width direction layout portion 12Lb is supported by the second clamp 103.

[0111] The second clamp 103 is fixed to the second frame portion 31c by a fastening member 104, and supports the vehicle width direction layout portion 12Lb in a direction along the vehicle width direction. The fastening member 104 is exposed forward above the second clamp 103, so it can be easily accessed from the outside, making it easy to attach and detach the second clamp 103.

[0112] In addition, since the second clamp 103 supports the vehicle width direction wiring portion 12Lb at a position lower than the opening portion 16k, it is easy to form a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb.

[0113] Furthermore, the second jig 103 can set the position of the vehicle width direction routing portion 12Lb with reference to the sub-frame 31 , so that the vehicle width direction routing portion 12Lb can be easily arranged so as not to contact the vehicle frame 11 including the sub-frame 31 .

[0114] In addition, in this structure, if Fig. 9 As shown, at least a portion of the motor drive wire 12L1 is covered by a covering member, and the first clamp 101 and the second clamp 103 support the motor drive wire 12L1 via the covering member. However, the present invention is not limited to this structure, and the covering member may be omitted.

[0115] The motor drive line 12L1 is bent upward from the end of the other side (the left side of the vehicle body) of the vehicle width direction routing portion 12Lb, extends upward behind the subframe 31, and is connected to the upper part of the PDU 100. The portion 12Lc ( Fig. 9) is the portion of the motor drive line 12L1 arranged in the vertical direction of the vehicle body, and is hereinafter referred to as the vertically arranged portion 12Lc. Fig. 9 As shown, the up-down routing portion 12Lc extends in the up-down direction behind the sub-frame 31 and is connected to the upper portion of the PDU 100 .

[0116] In this way, the motor drive line 12L1 has a loop composed of the front-rear direction wiring portion 12La, the vehicle width direction wiring portion 12Lb, and the up-down direction wiring portion 12Lc between the swing arm 16 and the PDU 100. As a result, compared with the case where the swing arm 16 and the PDU 100 are connected at a short distance, the wiring length between the swing arm 16 and the PDU 100 can be increased, and the motor drive line 12L1 with a long wiring length can be compactly arranged.

[0117] In addition, by providing the first clamp 101 and the second clamp 103 , it is possible to prevent the motor drive wire 12L1 from coming into contact with various parts of the saddle-ride type vehicle 10 while holding the loop.

[0118] However, when the PDU 100 is disposed in the area between the pivot 33 and the front end 17F of the seat 17 in the front-rear direction of the vehicle, the PDU 100 is close to the motor 12, so that the motor drive line 12L1 between the PDU 100 and the motor 12 can be shortened. However, if the motor drive line 12L1 is shortened, the motor drive line 12L1 will bend greatly as the swing arm 16 swings, and the load acting on the motor drive line 12L1 may become too large.

[0119] In contrast, in this structure, even if the PDU 100 is arranged near the motor 12, that is, around the pivot 33, since the motor drive wire 12L1 has a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb, it is possible to avoid the motor drive wire 12L1 from being greatly bent even when the swing arm 16 swings. Thus, it is possible to suppress the load acting on the motor drive wire 12L1 when the swing arm 16 swings.

[0120] As described above, in the saddle-riding type vehicle 10 of the present embodiment, the PDU 100 is located in the region between the pivot 33 and the front end 17F of the seat 17 in the vehicle front-rear direction, and the swing arm 16 has: a wiring accommodating portion 16a through which the motor drive wire 12L1 composed of motor wiring passes; a wall portion 16w located forward of the wiring accommodating portion 16a; and an opening portion 16k located above the wall portion 16w and through which the motor drive wire 12L1 passes. The portion of the motor drive wire 12L1 extending from the opening portion 16k through the bottom of the pivot 33 and toward the PDU 100 has: a front-rear direction arranging portion 12La arranged along the vehicle body front-rear direction; and a vehicle width direction arranging portion 12Lb connected to the front-rear direction arranging portion 12La and arranged along the vehicle width direction.

[0121] According to this structure, the PDU 100 can be arranged at a position close to the motor 12, and the motor drive wire 12L1 has a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb between the PDU 100 and the motor 12, so that the motor drive wire 12L1 can be prevented from being greatly bent when the swing arm 16 swings. As a result, the load acting on the motor drive wire 12L1 when the swing arm 16 swings can be suppressed.

[0122] Therefore, it is possible to promote the practical use and popularization of saddle-ride type electric vehicles in which the PDU 100 is arranged at a position close to the motor 12, and to contribute to improvement of energy efficiency.

[0123] In addition, the wall portion 16w has a first surface portion 16w1 extending vertically and horizontally toward the vehicle body, and a second surface portion 16w2 intersecting the first surface portion 16w1 on the side of the opening portion 16k and extending longitudinally and horizontally toward the vehicle body, and the front-rear direction wiring portion 12La is inclined downward toward the front side of the vehicle body along the second surface portion 16w2. According to this structure, since the front-rear direction wiring portion 12La is inclined downward toward the front side of the vehicle, it is easy to form a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb.

[0124] Furthermore, since the first jig 101 is provided to support the front-rear direction wiring portion 12La along the second surface portion 16w2, the front-rear direction wiring portion 12La can be easily arranged along the second surface portion 16w2 without contacting the wall portion 16w including the second surface portion 16w2.

[0125] In addition, since the second jig 103 is provided to support the vehicle width direction wiring portion 12Lb at a position lower than the opening 16k, it is easy to form a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb.

[0126] In addition, the first clamp 101 is supported by the wall portion 16w, and the front-rear direction wiring portion 12La is supported to face the front side of the vehicle body and one side in the vehicle width direction. Therefore, it is easy to prevent the front-rear direction wiring portion 12La from contacting the wall portion 16w, and to form it longer using the limited front-rear space of the vehicle body. Thus, it is easy to form a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb, and it is possible to effectively suppress the load acting on the motor drive wire 12L1 when the swing arm 16 swings.

[0127] In addition, the vehicle frame 11 includes the subframe 31 that supports the PDU 100, and the second clamp 103 is supported by the subframe 31, so it is easy to arrange the vehicle width direction layout portion 12Lb so as not to contact the vehicle frame 11 including the subframe 31. In addition, since the second clamp 103 is supported by the subframe 31 that supports the PDU 100, it is possible to reduce dedicated components for supporting the second clamp 103 and simplify the supporting structure.

[0128] In addition, if Fig.10 As shown, when viewed along the front-to-back direction of the vehicle body, the lower edge SL of the opening 16k is located below the pivot 33. Therefore, the motor drive line 12L1 can be compactly arranged using the opening 16k left below the pivot 33, thereby easily forming the front-to-back arrangement portion 12La.

[0129] The above-mentioned embodiment is only one form of the present invention, and the present invention is not limited to the above-mentioned embodiment, and the structure of the details and the like may be modified as appropriate.

[0130] Fig.12 1 is a diagram showing a layout structure of the motor drive wire 12L1 according to a modification.

[0131] In this modification, the fixing position of the vehicle width direction layout portion 12Lb is particularly different from that of the above-mentioned embodiment. Fig.12 As shown, a third clamp 105 supporting the vehicle width direction layout portion 12Lb is fixed to the front side surface of the wall portion 16w via a plurality of fastening members 106. According to this structure, the vehicle width direction layout portion 12Lb is supported by the front side surface of the wall portion 16w, and the third clamp 105 supporting the vehicle width direction layout portion 12Lb is provided on the front side surface of the wall portion 16w, so that the vehicle width direction layout portion 12Lb is provided at a position close to the first surface portion 16w1. Therefore, a loop from the front-back direction layout portion 12La to the vehicle width direction layout portion 12Lb can be compactly formed. Therefore, even if the saddle-riding type vehicle 10 is a small vehicle in which the front-back space between the swing arm 16 and the PDU 100 is narrower, a loop of the motor drive wire 12L1 can be formed, thereby suppressing the load acting on the motor drive wire 12L1 when the swing arm 16 swings.

[0132] Furthermore, the third jig 105 can set the position of the vehicle width direction wiring portion 12Lb based on the first surface portion 16w1, so that the vehicle width direction wiring portion 12Lb can be compactly arranged using the space in front of the first surface portion 16w1 without contacting the wall portion 16w including the first surface portion 16w1.

[0133] Furthermore, since the fastening member 106 for fixing the third clamp 105 is exposed in front of the first surface portion 16 w 1 , the fastening member 106 can be easily accessed from the outside, and the third clamp 105 can be easily attached and detached.

[0134] In addition, the first clamp 101 is an example of the "first support portion" of the present invention, the second clamp 103 is an example of the "second support portion" of the present invention, and the third clamp 105 is an example of the "front wall support portion" of the present invention. The shape and structure of each clamp 101 to 103 can also be changed appropriately. In addition, the position and direction of the motor drive wire 12L1 can also be changed appropriately, and the support structure of the motor drive wire 12L1 can also be widely applied to a known support structure.

[0135] In addition, the present invention is applied to Figure 1 The present invention is not limited to the case of the two-wheeled automatic vehicle shown in the figure, but it is not limited to this. The present invention can also be applied to any electric vehicle of the saddle-riding type. Moreover, the saddle-riding type vehicle is not limited to a two-wheeled vehicle, but can also be a three-wheeled vehicle or a four-wheeled vehicle. In addition, the power supply unit of the present invention is not limited to the PDU 100, and a known structure for supplying power to the motor 12 can be widely applied. In addition, the motor wiring of the present invention is not limited to the three-phase motor drive line 12L1, and a known motor wiring can be widely applied.

[0136] [Structure supported by the above-mentioned embodiment]

[0137] (Structure 1) A saddle-riding electric vehicle, comprising: a swing arm, which is supported on a swing shaft provided on a frame in a swingable manner and supports a rear wheel; a seat for a passenger to sit on; a motor, which is mounted on the swing arm and drives the rear wheel; a power supply unit, which is mounted on the frame and supplies power to the motor; and a motor wiring, which electrically connects the power supply unit to the motor, wherein the power supply unit is located in an area between the swing shaft and the front end of the seat in the front-rear direction of the vehicle, and the swing arm has: a wiring accommodating portion, through which the motor wiring passes; a wall portion, which is located at a position forward of the wiring accommodating portion; and an opening portion, which is located above the wall portion and through which the motor wiring passes, and a portion of the motor wiring that extends from the opening portion through the bottom of the swing shaft and toward the power supply unit comprises: a front-rear direction wiring portion, which is wired along the front-rear direction of the vehicle body; and a vehicle width direction wiring portion, which is connected to the front-rear direction wiring portion and is wired along the vehicle width direction.

[0138] According to this configuration, even if the power supply unit is arranged at a position close to the motor, it is possible to suppress the load acting on the motor wiring when the swing arm swings.

[0139] (Structure 2) In the saddle-riding electric vehicle described in Structure 1, the wall portion has: a first surface portion extending upward and downward and left and right of the vehicle body; and a second surface portion intersecting with the first surface portion on the opening side and extending forward and backward and left and right of the vehicle body, and the front-to-back direction layout portion is inclined downward toward the front side of the vehicle body along the second surface portion.

[0140] According to this structure, it is easy to form a loop including the front-rear direction routing portion and the vehicle width direction routing portion.

[0141] (Structure 3) In the saddle-ride type electric vehicle according to Structure 2, the saddle-ride type electric vehicle includes a first support portion that supports the front-rear direction layout portion along the second surface portion.

[0142] According to this configuration, the front-rear direction routing portion can be easily arranged along the second surface portion without coming into contact with the wall portion including the second surface portion.

[0143] (Structure 4) In the saddle-ride type electric vehicle according to Structure 3, the saddle-ride type electric vehicle includes a second support portion that supports the vehicle width direction layout portion at a position lower than the opening portion.

[0144] According to this structure, it is easy to form a loop including the front-rear direction routing portion and the vehicle width direction routing portion.

[0145] (Configuration 5) In the saddle-ride type electric vehicle according to Configuration 4, the first support portion is supported by the wall portion, and supports the front-rear direction layout portion so as to face the vehicle body front side and one side in the vehicle width direction.

[0146] According to this structure, it is easy to prevent the front-to-back direction layout portion from contacting the wall portion, and to make it longer by utilizing the limited front-to-rear space of the vehicle body. It is easy to form a ring including the front-to-back direction layout portion and the vehicle width direction layout portion, which can effectively suppress the load acting on the motor drive line when the swing arm swings.

[0147] (Structure 6) In the saddle-ride type electric vehicle according to Structure 4 or 5, the frame includes a sub-frame that supports the electric power supply unit, and the second support unit is supported by the sub-frame.

[0148] According to this structure, it is easy to arrange the vehicle width direction routing portion so as not to contact the vehicle frame including the sub-frame. In addition, it is possible to reduce the number of dedicated components for supporting the second clamp and simplify the support structure.

[0149] (Structure 7) In the saddle-ride type electric vehicle according to any one of Structures 1 to 6, a lower edge of the opening is located below the swing axis when viewed in the vehicle body front-rear direction.

[0150] According to this configuration, the motor wiring can be compactly routed using the opening portion provided below the swing shaft, and the front-rear direction routing portion can be easily formed.

[0151] (Configuration 8) In the saddle-ride type electric vehicle according to any one of Configurations 1 to 3, the vehicle width direction layout portion is supported by the front side surface of the wall portion, and a wall front support portion supporting the vehicle width direction layout portion is provided on the front side surface of the wall portion.

[0152] According to this configuration, the vehicle width direction routing portion can be compactly arranged using the space in front of the wall portion without contacting the wall portion, and a loop from the front-rear direction routing portion to the vehicle width direction routing portion can be compactly formed.

Claims

1. A saddle-riding electric vehicle comprising: A swing arm (16) is swingably supported on a swing shaft (33) provided on the vehicle frame (11) and supports the rear wheel (15); A seat (17) for passengers to sit on; A motor (12) mounted on the swing arm (16) for driving the rear wheel (15); a power supply unit (100) mounted on the vehicle frame (11) and supplying power to the motor (12); and a motor wiring (12L1) which electrically connects the power supply unit (100) and the motor (12), in, The power supply unit (100) is located in a region between the swing shaft (33) and the front end of the seat (17) in the front-rear direction of the vehicle. The swing arm (16) comprises: a wiring accommodating portion (16a) through which the motor wiring (12L1) passes; a wall portion (16w) located forward of the wiring accommodating portion (16a); and an opening portion (16k) located above the wall portion (16w) and through which the motor wiring (12L1) passes. The portion of the motor wiring (12L1) extending from the opening (16k) through the bottom of the swing shaft (33) and toward the power supply unit (100) includes: a front-to-rear direction layout portion (12La) which is laid along the front-to-rear direction of the vehicle body; and a vehicle width direction layout portion (12Lb) which is connected to the front-to-rear direction layout portion (12La) and is laid along the vehicle width direction.

2. The saddle-riding type electric vehicle according to claim 1, wherein: The wall portion (16w) comprises: a first surface portion (16w1) extending upward and downward and horizontally toward the vehicle body; and a second surface portion (16w2) intersecting the first surface portion (16w1) on the side of the opening portion (16k) and extending forward and backward and horizontally toward the vehicle body, The front-rear direction layout portion (12La) is inclined downward toward the front side of the vehicle body along the second surface portion (16w2).

3. The saddle-riding type electric vehicle according to claim 2, wherein: The saddle-ride type electric vehicle includes a first support portion (101) supporting the front-rear layout portion (12La) along the second surface portion (16w2).

4. The saddle-riding type electric vehicle according to claim 3, wherein: The saddle-ride type electric vehicle includes a second support portion (103) that supports the vehicle width direction layout portion (12Lb) at a position lower than the opening portion (16k).

5. The saddle-riding type electric vehicle according to claim 4, wherein: The first support portion (101) is supported by the wall portion (16w) to support the front-rear layout portion (12La) toward the front side of the vehicle body and one side in the vehicle width direction.

6. The saddle-riding type electric vehicle according to claim 4 or 5, wherein: The frame (11) has a sub-frame (31) supporting the power supply unit (100). The second support portion (103) is supported by the sub-frame (31).

7. The saddle-riding type electric vehicle according to claim 1, wherein: When viewed in the front-rear direction of the vehicle body, the lower edge of the opening (16k) is located below the swing shaft (33).

8. The saddle-riding type electric vehicle according to claim 1, wherein: The vehicle width direction layout portion (12Lb) is supported by the front side surface of the wall portion (16w). A wall front support portion (105) for supporting the vehicle width direction layout portion (12Lb) is provided on the front side surface of the wall portion (16w).

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