Saddle-type electric vehicle

Abstract

To suppress a load, which acts on motor wiring during swinging of a swing arm even when a power supply unit is located at a position close to a motor.SOLUTION: In a saddle riding vehicle (10), a power supply unit (100) is attached to around a swing shaft (33) of a vehicle body frame (11). A swing arm (16) includes a wiring storage part (16a) through which motor wiring (12L1) coming from a motor (12) passes, a wall part (16w) located ahead of the wiring storage part (16a), and an aperture (16k) which is located above the wall part (16w) and through which the motor wiring (12L1) passes. The motor wiring (12L1) includes as a portion, which extends from the aperture (16k) through below the swing shaft (33) to the power supply unit (100), a fore-and-aft direction routing part (12La) which is routed in a vehicular fore-and-aft direction, and a vehicle width routing part (12Lb) that is coupled to the fore-and-aft direction routing part (12La) and routed in a vehicle width direction.SELECTED DRAWING: Figure 9

Description

[Technical Field]

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

[0002] In recent years, efforts to realize a low-carbon or carbon-free society have become more active, and research and development into saddle-type electric vehicles is being conducted to reduce CO2 emissions and improve energy efficiency in vehicles. A known configuration for this type of vehicle includes a body frame having a swing shaft that swingably supports a swing arm that supports the rear wheels, a motor attached to the swing arm and driving the rear wheels, a power drive unit (PDU) that functions as a power supply unit that supplies power to the motor, and three-phase electric wires that electrically connect the PDU and the motor (see, for example, Patent Document 1). In the technology described in Patent Document 1, the power supply unit is attached to the body frame at approximately the same height as the motor, and motor wiring consisting of three-phase electric wires is routed within the vertical width of the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6864108 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional configurations, if the power supply unit is placed near the swing axis, which is close to the motor, the motor wiring between the power supply unit and the motor is short, so the motor wiring bends significantly as the swing arm swings, and there is a risk that the load acting on the motor wiring will become excessive. The present invention has been made in view of the above circumstances, and aims to suppress the load acting on the motor wiring when the swing arm swings, even if the power supply unit is located close to the motor, thereby contributing to improving energy efficiency. [Means for solving the problem]

[0005] The present invention provides a saddle-ride type electric vehicle including a body frame having a swing shaft that swingably supports a swing arm that supports a rear wheel, a motor attached to the swing arm and driving the rear wheel, a power supply unit attached to the body frame and supplying power to the motor, and motor wiring that electrically connects the power supply unit and the motor, wherein the power supply unit is attached to the body frame around the swing shaft, and the swing arm has a wiring housing portion through which the motor wiring passes, a wall portion located forward of the wiring housing portion, and an opening located above the wall portion and through which the motor wiring passes, and a portion of the motor wiring that extends from the opening, passing below the swing shaft toward the power supply unit, has a longitudinal routing portion that is routed along the longitudinal direction of the vehicle, and a vehicle width routing portion that is connected to the longitudinal routing portion and routed along the vehicle width direction. [Effects of the Invention]

[0006] Even if the power supply unit is located close to the motor, the load acting on the motor wiring when the swing arm swings can be reduced. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a side view of a saddle-ride type vehicle according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view showing the body frame together with the swing arm. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] 2 is a cross-sectional view of the swing arm taken along the line AA in FIG. 1. [Figure 6] FIG. 2 is a diagram showing the motor cut along a plane perpendicular to the motor shaft together with the peripheral configuration. [Figure 7]3 is a view showing the reduction mechanism accommodating chamber along the BB cross section of FIG. 2 together with the surrounding configuration. [Figure 8] FIG. 2 is a diagram showing a state in which a motor cover is removed from a swing arm together with the surrounding configuration. [Figure 9] FIG. 10 is a diagram showing motor wiring between the PDU and the swing arm together with the peripheral configuration. [Figure 10] 10 is a cross-sectional view of FIG. 9 taken along the line XX. [Figure 11] FIG. 10 is a cross-sectional view taken along the line XI-XI of FIG. 9. [Figure 12] 10A and 10B are diagrams illustrating a wiring structure of a motor drive line according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description, directions such as front, rear, left, right, up and down are the same as directions relative to the vehicle body unless otherwise specified. In addition, in each drawing, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

[0009] [Embodiment Mode] FIG. 1 is a side view of a saddle-ride type vehicle 10 according to an embodiment of the present invention. The saddle-ride type vehicle 10 is an electric motorcycle that includes a body frame 11, a motor 12 that drives a rear wheel 15 that is a drive wheel, a front fork 14 that supports a front wheel 13 so that it can be steered, a swing arm 16 that supports the rear wheel 15, a seat 17 for a rider, and a body cover 18 that covers the body frame 11. The saddle-ride type vehicle 10 is a vehicle in which a rider sits astride on a seat 17. The saddle-ride type vehicle 10 of this embodiment is a scooter-type electric two-wheeled vehicle equipped with a low step floor 19, a side stand 20a, and a center stand 20b, and is a type of saddle-ride type electric vehicle.

[0010] Fig. 2 is a side view showing the body frame 11 together with the swing arm 16. Fig. 3 is a view showing the body frame 11 from the rear. In Fig. 3, the symbol LC indicates the center of the vehicle width of the saddle-ride type vehicle 10. 2 and 3, the body frame 11 includes a head pipe 21 provided at the front of the vehicle body, a down frame 22 extending rearward and downward from the head pipe 21, an under frame 23 extending rearward from the down frame 22, and left and right rear frames 24 extending rearward and upward from the under frame 23. The step floor 19 shown in FIG. 1 is supported above the under frame 23, and is provided for a rider seated in the seat 17 to place their feet on.

[0011] The side stand 20a is rotatably supported on the lower left side of the body frame 11 and can be placed on the ground in an upright position, allowing the saddle-ride type vehicle 10 to be parked with the vehicle tilted to the left. As shown in Fig. 1, the center stand 20b is rotatably supported on the swing arm 16 behind the side stand 20a and in front of the rear wheel 15 and can be placed on the ground in an upright position, allowing the saddle-ride type vehicle 10 to be parked upright without tilting to the left or right. The center stand 20b is also called a main stand.

[0012] The front forks 14 are supported by a head pipe 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 an axle provided at the lower end of the front forks 14. A steering handle 25, which is held by the rider, is attached to the upper end of the front forks 14.

[0013] As shown in FIG. 2, left and right pivot portions 32 are supported on the left and right rear frames 24 via subframes 31. The left and right pivot portions 32 support the swing arm 16 via a pivot shaft 33 so that it can swing up and down. The swing arm 16 has a hollow structure and houses the motor 12 that drives the rear wheel 15 at a position corresponding to the left side of the rear wheel 15. In other words, the swing arm 16 not only functions as a support member that supports the rear wheel 15, but also as a drive device that drives the rear wheel 15. The swing arm 16 can also be called a swing-type power unit. A rear cushion 26 is interposed between the rear end of the swing arm 16 and the rear frame 24.

[0014] In addition, the symbol PM shown in Figure 2 and each figure described below indicates the axis of the motor shaft 12a, the symbol PR indicates the axis of the rear wheel shaft 15a, and the symbol PC indicates the axis of the intermediate shaft 71 that forms part of the reduction mechanism of the motor 12.

[0015] The subframe 31 is a frame that constitutes part of the body frame 11. The subframe 31 includes left and right first frame portions 31a that extend rearward from the left and right rear frames 24, a cross pipe 31b that bridges the rear ends of the left and right first frame portions 31a, and a second frame portion 31c that connects the cross pipe 31b with 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. The second frame portion 31c is formed as an inverted V-shaped frame that extends downward from the bottom surface of the cross pipe 31b in the rear view of the vehicle shown in Figure 3. A power drive unit 100 (hereinafter referred to as PDU 100) that supplies power to the motor 12 is disposed in the space surrounded by the subframe 31.

[0016] By disposing the PDU 100 in the space surrounded by the subframe 31, as shown in FIG. 1 , the PDU 100 is located forward of the position PP of the pivot shaft 33 and rearward of the position PS of the front end 17F of the seat 17. As a result, the PDU 100 is disposed around the pivot shaft 33, which is close to the motor 12. In this configuration, the PDU 100 is disposed in front of and below the pivot shaft 33, more specifically, in front of and below the pivot shaft 33 and rearward of the rear frame 24. With this configuration, the PDU 100 can be protected by the subframe 31. Furthermore, since the PDU 100 is located in the center of the front-rear direction of the vehicle body and at the bottom of the vehicle body, this is advantageous for centralizing the mass and optimizing the center of gravity. The position of the PDU 100 is not limited to being below and in front of the pivot shaft 33, but may be changed to an appropriate position around the pivot shaft 33. Furthermore, the PDU 100 is not limited to being disposed within the subframe 31, and a wide range of known PDU arrangement structures can be applied.

[0017] Fig. 4 is a perspective view of the swing arm 16. Fig. 5 is a cross-sectional view of the swing arm 16 taken along the line AA in Fig. 1. 4 and 5, the swing arm 16 has a shape that extends in a curved manner from in front of the rear wheel 15 toward the left side of the rear wheel 15. As shown in Fig. 4, a pivot insertion portion 41 for connecting to the body frame 11 is provided at the front end of the swing arm 16, and the motor 12 is housed on the left rear side of the swing arm 16.

[0018] As shown in Fig. 4, the swing arm 16 includes a motor case 42, a gear case 43 located on the inner side of the motor case 42 in the vehicle width direction, and a motor cover 44 located on the outer side of the motor case 42 in the vehicle width direction. As shown in Fig. 5, a motor housing chamber 46 that houses the motor 12 is formed between the motor case 42 and the motor cover 44, and a speed reduction mechanism housing chamber 47 that houses the speed reduction mechanism of the motor 12 is formed between the motor case 42 and the gear case 43.

[0019] The motor case 42 constitutes the majority of the swing arm 16 and is integrally provided with a plate-shaped side wall 51 extending in the front-rear and up-down directions, a cylindrical outer peripheral member 52 extending outward in the vehicle width direction from the side wall 51, and protruding portions 53, 54 (FIG. 4) protruding rearward beyond the side wall 51 and the outer peripheral member 52. The side wall 51 constitutes an outer wall exposed on the inner side of the swing arm 16 in the vehicle width direction, and the pivot insertion portion 41 is provided integrally with the front portion of this side wall 51.

[0020] The cylindrical outer peripheral member 52 of the motor case 42 forms part of the top plate, bottom plate, etc. of the swing arm 16. A left portion of the outer peripheral member 52 is provided with a plurality of female thread portions that form part of a plurality of connecting portions 60 that connect the motor case 42 and the motor cover 44. As shown in FIG. 4 , the multiple connecting portions 60 connect the motor case 42 and the motor cover 44 by inserting fastening members 60t from the outer side (left side) of the motor cover 44 in the vehicle width direction and fastening them to the female thread portions of the motor case 42, respectively.

[0021] A breather case 70 is attached to the upper right portion of the outer peripheral member 52. In this embodiment, the motor case 42, the gear case 43, and the motor cover 44 are made of metal, but they may also be made of materials other than metal.

[0022] As shown in FIG. 5, the side wall 51 of the motor case 42 extends between the motor accommodating chamber 46 and the reduction mechanism accommodating chamber 47, and therefore the side wall 51 functions as a partition wall separating the motor accommodating chamber 46 and the reduction mechanism accommodating chamber 47. A motor support portion 55 that protrudes outward in the vehicle width direction is integrally formed on this side wall 51 within the motor housing chamber 46. The motor 12 is supported on this motor support portion 55. The motor 12 includes a motor shaft 12a (FIG. 6) that extends in the vehicle width direction, a rotor 12r that rotates integrally with the motor shaft 12a, and a stator 12s that is located on the outer periphery of the rotor 12r. The motor 12 is an electric motor that uses three-phase AC as its power source and is also referred to as a three-phase motor, etc.

[0023] The motor 12 is attached to the side wall 51 at a position spaced apart from the motor support portion 55 on the outer side in the vehicle width direction. As a result, a plurality of (three) motor drive wires 12L1, which are relatively thick wires among a plurality of wires connected to the motor 12, are arranged between the motor 12 and the side wall 51. cable Delivery cable A space is formed. A partition wall 56 is also integrally formed on the side wall 51, dividing the interior space of the motor case 42 into the motor housing chamber 46 and other spaces. The partition wall 56 protrudes in the vehicle width direction forward of the motor 12 and extends to a position where it abuts against the motor cover 44.

[0024] The motor cover 44 is connected to the motor case 42 from the outside in the vehicle width direction, and functions as a lid member that covers the motor housing chamber 46 inside the motor case 42 from the outside in the vehicle width direction. The motor case 42, including the partition wall 56, and the motor cover 44 form the motor housing chamber 46 as a chamber that is closed off from the outside space. The area of ​​the motor case 42 that is not covered by the motor cover 44 is covered from the outside in the vehicle width direction by a swing arm cover 45.

[0025] The motor cover 44 has a certain width in the vehicle width direction, and the internal space of the motor cover 44 also forms part of the motor housing chamber 46. By separating the motor 12 and the motor cover 44 in the vehicle width direction, the wiring 12L2 (FIG. 5) excluding the motor drive line 12L1 from the multiple wirings connected to the motor 12 passes through the wiring 12L2. cable A space is formed. This wiring 12L2 is connected to an angle sensor for detecting the rotation angle of the motor 12. However, the wiring 12L2 does not have to be limited to a wiring connected to an angle sensor, but may be any wiring connected to any sensor that detects information about the motor 12. In this way, the wirings 12L1 and 12L2 connected to the motor 12 are arranged on the inside and outside of the motor 12 in the vehicle width direction. cable Space is reserved for each.

[0026] The gear case 43 is a component connected to the motor case 42 from the inside in the vehicle width direction, and has a reduction mechanism accommodating chamber 47 between it and a side wall 51 of the motor case 42. The reduction mechanism accommodating chamber 47 is enclosed by the gear case 43 and the motor case 42 and is therefore closed off from the outside space.

[0027] FIG. 6 is a diagram showing the motor 12 cut along a plane perpendicular to the motor shaft 12a, together with the peripheral configuration. As shown in Figure 6, the partition wall 56 is formed with two wiring insertion holes 56a, 56b through which the multiple motor drive wires 12L1 pass. A grommet 80, which is a cylindrical rubber part, is attached to each of the wiring insertion holes 56a, 56b. Each motor drive wire 12L1 is supported by the partition wall 56 by passing through a central hole of each grommet 80. The presence of the grommets 80 between each of the wiring insertion holes 56a, 56b and the motor drive wires 12L1 improves the airtightness of the motor housing chamber 46, preventing moisture, dust, and the like from entering the motor housing chamber 46. The motor drive line 12L1 is an example of the "motor wiring" of the present invention, and the grommet 80 is an example of the "intervening member" of the present invention. The intervening member of the present invention is not limited to the grommet 80, and a wide range of members that can fill the gap between the wiring insertion holes 56a, 56b and the motor drive line 12L1 can be applied. Furthermore, the PDU 100 is an example of the "power supply unit" of the present invention, and the pivot shaft 33 is an example of the "swinging shaft" of the present invention.

[0028] Fig. 7 is a view showing the reduction mechanism accommodating chamber 47 together with the surrounding configuration in the BB cross section of Fig. 2. The BB cross section is a cross 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. As shown in Figure 7, an intermediate shaft 71 and an output shaft that also serves as the rear wheel axle 15a are rotatably supported in parallel with the motor shaft 12a within the reduction mechanism accommodating chamber 47. The motor shaft 12a is the rotating shaft of the motor 12, penetrates the side wall 51 of the motor case 42, and has a first gear 12a1 that rotates integrally with the motor shaft 12a within the reduction mechanism accommodating chamber 47. The intermediate shaft 71 has a large-diameter second gear 71a1 that meshes with the first gear 12a1 and a small-diameter third gear 71a2 that rotates integrally with the second gear 71a1. The rear wheel axle 15a has a large-diameter fourth gear 15a1 that meshes with the third gear 71a2. By appropriately setting the number of teeth of each of the gears 12a1, 71a1, 71a2 and 15a1, a reduction mechanism is formed that reduces the rotation of the motor 12 at a predetermined reduction ratio and transmits the rotation to the rear wheel shaft 15a.

[0029] The motor case 42 is located between the gear case 43 and the motor cover 44, and is also a case located in the left-right center of the swing arm 16, so it can also be called a center case. The gear case 43 forms the right side of the swing arm 16, so it can also be called a right side case or one of the left and right cases. The motor cover 44 forms the left side of the swing arm 16, so it can also be called a left side case or the other of the left and right cases.

[0030] As shown in Fig. 4, a plurality of fastening members 61t (four in this configuration) are fastened to the side wall 51 of the gear case 43 from the inner side (right side) in the vehicle width direction. The area to which these fastening members 61t are fastened is an area that overlaps with the motor 12 as viewed in the width direction, but avoids the reduction mechanism accommodating chamber 47. The fastening structures of these fastening members 61t are the same, and as shown in Fig. 7, each fastening member has a screw insertion portion 61s provided in the gear case 43 and a female thread portion 61m provided in the motor case 42. The gear case 43 and the motor case 42 are fastened together by inserting each fastening member 61t into the screw insertion portion 61s and fastening it to the female thread portion 61m. That is, the fastening member 61t, the screw insertion portion 61s, and the female thread portion 61m function as a first fastening portion 61 that fastens the gear case 43 and the motor case 42 from the inner side in the vehicle width direction.

[0031] The first fastening portion 61 is configured to fasten the fastening member 61t from the right side in the vehicle width direction, which is the opposite side of the motor 12, so the fastening member 61t can be removed without removing the motor 12. Since there is no need to remove the motor 12, the work of removing the gear case 43 from the motor case 42 becomes easier, in other words, the work of releasing the fastened state between the gear case 43 and the motor case 42 becomes easier.

[0032] 7, a stud bolt 61a and a nut (CAP NUT) 61b are used as the fastening member 61t of the first fastening portion 61. The stud bolt 61a is also called an embedded bolt, and has male threads on both ends, one of which is fastened to a female thread 61m of the motor case 42. The male thread portion at the tip end of the stud bolt 61a is fastened to the motor case 42, and the stud bolt 61a is passed through a screw insertion portion 61s of the gear case 43. Then, a nut 61b is fastened to the male thread portion at the base end side exposed to the outside through the screw insertion portion 61s. This fastening structure has the advantage that even if the nut 61b loosens, the stud bolt 61a will not loosen, and the first fastening portion 61 can be prevented from moving significantly toward the rear wheel 15, which is inward in the vehicle width direction.

[0033] 2, the motor case 42 is provided with protruding portions 53, 54 that protrude rearward beyond the motor cover 44 and overlap the gear case 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 outer side (left side) in the vehicle width direction. 7, the fastening members 62t have the same fastening structure, which includes a screw insertion portion 62s provided in the motor case 42 and a female thread portion 62m provided in the gear case 43. The gear case 43 and the motor case 42 are fastened together by inserting each fastening member 62t into the screw insertion portion 62s and fastening each fastening member 62t to the female thread portion 62m.

[0034] The fastening member 62t is a bolt, such as a flange bolt, having a male thread portion at one end and a large-diameter head portion at the other end. The fastening member 62t, the screw insertion portion 62s, and the female thread portion 62m function as a second fastening portion 62 that fastens the gear case 43 and the motor case 42 from the outer side in the vehicle width direction. The second fastening portion 62 is provided at a position that avoids the motor 12, and therefore the fastening member 62t can be removed without removing the motor 12. Since there is no need to remove the motor 12, the task of removing the gear case 43 from the motor case 42, that is, the task of releasing the fastened state between the gear case 43 and the motor case 42, becomes easier.

[0035] Next, the wiring structure of the motor drive line 12L1 will be described. Fig. 8 is a diagram showing the peripheral configuration with the motor cover 44 removed from the swing arm 16. Fig. 9 is a diagram showing the motor drive line 12L1 between the PDU 100 and the swing arm 16 together with the peripheral configuration. 8 and 9, the swing arm 16 has a wiring housing 16a through which the motor drive line 12L1 passes, a wall 16w located forward of the wiring housing 16a, and an opening 16k (FIG. 9) located above the wall 16w and opening forward. As shown in FIG. 9, the motor drive line 12L1 extends forward from the wiring housing 16a and passes through the opening 16k to be exposed in front of the swing arm 16. The opening 16k opens in the front-to-rear direction directly below the pivot shaft 33, so that the motor drive line 12L1 passes below the pivot shaft 33 and is connected to the PDU 100. The wall 16w is fixed to the swing arm 16 and is formed of a plate material that is L-shaped when viewed from the side of the vehicle body.

[0036] Fig. 10 is a view showing a cross section taken along line XX in Fig. 9. In Fig. 10, the symbol SL indicates the lower edge of the opening 16k, the symbol SU indicates the upper edge of the opening 16k, and the symbol SS indicates the left and right side edges of the opening 16k. 10, the wall 16w integrally includes a first surface 16w1 extending vertically and horizontally below the opening 16k and a second surface 16w2 extending in a direction intersecting the first surface 16w1 (the longitudinal direction of the vehicle) at the upper end of the first surface 16w1. The second surface 16w2 has an upper surface extending vertically and horizontally, and a first clamp 101 for supporting the motor drive line 12L1 is fixed to the upper surface.

[0037] First clamp 101 supports motor drive line 12L1 along second surface 16w2, facing forward and outward in the vehicle width direction (toward the right side of the vehicle body). Furthermore, first clamp 101 supports motor drive line 12L1 at a position slightly above second surface 16w2, which makes it easier to avoid direct contact between second surface 16w2 and motor drive line 12L1. In this configuration, as shown in FIG. 10, the first clamp 101 causes the motor drive line 12L1 to extend from within the swing arm 16 across the vehicle width center LC to the right side of the vehicle body, which is the opposite side, and then to extend forward from the opening 16k.

[0038] Here, the first clamp 101 is fixed to the wall 16w (corresponding to the swing arm 16 side) by a fastening member 102. Therefore, the orientation and position of the motor drive line 12L1 can be set with reference to the wall 16w. This makes it easier to arrange the motor drive line 12L1 along the second surface 16w2 without contacting the wall 16w. Furthermore, even if the swing arm 16 swings or the motor drive line 12L1 vibrates, it is easier to set the orientation and position of the motor drive line 12L1 so that it does not come into contact with the wall 16w or the like.

[0039] The fastening member 102 that secures the first clamp 101 to the wall 16w is fastened to the wall 16w from above. Therefore, the fastening member 102 is exposed above the wall 16w and in front of the opening 16k, allowing easy access to the fastening member 102 from the outside. This facilitates the attachment and detachment of the first clamp 101. Furthermore, because the motor drive line 12L1 is pulled out from the opening 16k that opens forward, the state of the motor drive line 12L1 can be easily seen from the outside.

[0040] 9, the second surface 16w2 is inclined downward and forward, and the motor drive line 12L1 is routed so as to extend downward and forward along the second surface 16w2. The portion 12La of the motor drive line 12L1 that extends downward and forward along the second surface 16w2 corresponds to the portion of the motor drive line 12L1 routed in the front-rear direction, and will be referred to as the front-rear routing portion 12La hereinafter. In this configuration, the front-rear direction wiring portion 12La is routed so as to extend downward toward the front through an opening 16k that is open below the pivot shaft 33 and above the wall portion 16w. Therefore, the front-rear direction wiring portion 12La can be lengthened by the amount that the front-rear direction wiring portion 12La is routed downward toward the front, and can be arranged so as not to come into contact with surrounding components such as the pivot shaft 33.

[0041] 9, the longitudinal routing portion 12La extends forward to a position overlapping with the lower rear portion of the subframe 31 (corresponding to a part of the second frame portion 31c) in a side view of the vehicle body. The motor drive line 12L1 has a portion 12Lb extending along the vehicle width direction from the front end of the longitudinal routing portion 12La. This portion 12Lb corresponds to the portion of the motor drive line 12L1 routed in the vehicle width direction, and will be referred to as the transverse routing portion 12Lb hereinafter.

[0042] FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 11 , the vehicle width direction wiring portion 12Lb extends from the right side of the vehicle body, which is one side in the vehicle width direction, to the left side of the vehicle body, which is the other side in the vehicle width direction, between the second frame portions 31c, which are made of inverted V-shaped frames that form the rear lower portion of the subframe 31. A portion of the vehicle width direction wiring portion 12Lb is supported by the second clamp 103. The second clamp 103 is fixed to the second frame portion 31c by a fastening member 104, and supports the vehicle width direction wiring portion 12Lb in a direction along the vehicle width direction. The fastening member 104 is exposed forward above the second clamp 103, so it is easily accessible from the outside, and the second clamp 103 can be easily attached and detached. Furthermore, since the second clamp 103 supports the vehicle width direction wiring portion 12Lb at a position lower than the opening 16k, it becomes easier to form a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb.

[0043] In addition, the second clamp 103 allows the position of the vehicle width direction wiring portion 12Lb to be set based on the subframe 31, making it easier to position the vehicle width direction wiring portion 12Lb without it coming into contact with the vehicle body frame 11 including the subframe 31. 9, at least a portion of motor drive line 12L1 is covered with a covering member, and first clamp 101 and second clamp 103 support motor drive line 12L1 via the covering member. However, this configuration is not limited to this, and the covering member may be omitted.

[0044] The motor drive line 12L1 bends upward from the end of the vehicle width direction routing portion 12Lb on the other vehicle width direction side (left side of the vehicle body), extends upward behind the subframe 31, and connects to the upper part of the PDU 100. This upward extending portion 12Lc (FIG. 9) is the part of the motor drive line 12L1 that is routed in the vertical direction of the vehicle body, and will be referred to as the vertical routing portion 12Lc hereinafter. As shown in FIG. 9, the vertical routing portion 12Lc extends vertically behind the subframe 31 and connects to the upper part of the PDU 100. In this way, the motor drive line 12L1 has a loop consisting of the longitudinal routing portion 12La, the transverse routing portion 12Lb, and the vertical routing portion 12Lc between the swing arm 16 and the PDU 100. This makes it possible to increase the wiring length between the swing arm 16 and the PDU 100 and to arrange the long motor drive line 12L1 in a compact manner, compared to when the swing arm 16 and the PDU 100 are connected over a short distance. Furthermore, by providing the first clamp 101 and the second clamp 103, the motor drive line 12L1 can be made less likely to come into contact with various parts of the saddle-ride type vehicle 10 while holding the loop.

[0045] Incidentally, if the PDU 100 is disposed in the region between the pivot shaft 33 and the front end 17F of the seat 17 in the vehicle longitudinal direction, the PDU 100 will be closer to the motor 12, making it possible to shorten the motor drive line 12L1 between the PDU 100 and the motor 12. However, if the motor drive line 12L1 is shortened, the motor drive line 12L1 may bend significantly as the swing arm 16 swings, and the load acting on the motor drive line 12L1 may become excessive. In contrast, in this configuration, even if the PDU 100 is disposed near the pivot shaft 33, which is close to the motor 12, the motor drive line 12L1 has a loop including the longitudinal routing portion 12La and the transverse routing portion 12Lb, so it is possible to prevent the motor drive line 12L from bending significantly even when the swing arm 16 swings. This makes it possible to suppress the load acting on the motor drive line 12L1 when the swing arm 16 swings.

[0046] As described above, in the saddle-ride type vehicle 10 of this embodiment, the PDU 100 is located in the region between the pivot shaft 33 and the front end 17F of the seat 17 in the vehicle longitudinal direction, and the swing arm 16 has a wiring housing 16a through which the motor drive line 12L1 consisting of the motor wiring passes, a wall portion 16w located forward of the wiring housing 16a, and an opening 16k located above the wall portion 16w and through which the motor drive line 12L1 passes. The portion of the motor drive line 12L1 that extends from the opening 16k, passing below the pivot shaft 33 toward the PDU 100, has a longitudinal routing portion 12La that is routed along the vehicle longitudinal direction, and a vehicle width direction routing portion 12Lb that is connected to the longitudinal routing portion 12La and routed along the vehicle width direction.

[0047] According to this configuration, the PDU 100 can be disposed close to the motor 12, and the motor drive line 12L1 has a loop including the longitudinal routing portion 12La and the transverse routing portion 12Lb between the PDU 100 and the motor 12, which prevents the motor drive line 12L1 from bending significantly when the swing arm 16 swings, etc. This makes it possible to suppress the load acting on the motor drive line 12L1 when the swing arm 16 swings, etc. Therefore, it is possible to promote the practical application and widespread use of saddle-ride type electric vehicles in which the PDU 100 is disposed in a position close to the motor 12, and to contribute to improving energy efficiency.

[0048] The wall 16w has a first surface 16w1 extending vertically and horizontally of the vehicle body, and a second surface 16w2 intersecting the first surface 16w1 at the opening 16k side and extending longitudinally and horizontally of the vehicle body, and the longitudinal routing portion 12La is inclined downward toward the front of the vehicle body along the second surface 16w2. With this configuration, the longitudinal routing portion 12La is inclined downward toward the front of the vehicle, which makes it easier to form a loop including the longitudinal routing portion 12La and the vehicle width direction routing portion 12Lb.

[0049] In addition, since the first clamp 101 is provided to support the longitudinal wiring portion 12La along the second surface portion 16w2, it is easy to arrange the longitudinal wiring portion 12La along the second surface portion 16w2 without contacting the wall portion 16w including the second surface portion 16w2. Furthermore, since the second clamp 103 supporting the vehicle width direction wiring portion 12Lb is provided at a position lower than the opening 16k, a loop including the front-rear direction wiring portion 12La and the vehicle width direction wiring portion 12Lb can be easily formed.

[0050] Furthermore, the first clamp 101 is supported by the wall 16w and supports the longitudinal wiring portion 12La toward the front of the vehicle body and toward one side in the vehicle width direction, so that the longitudinal wiring portion 12La does not come into contact with the wall 16w and can be easily formed long by utilizing the limited front-to-rear space of the vehicle body. This makes it easy to form a loop including the longitudinal wiring portion 12La and the transverse wiring portion 12Lb, and effectively suppresses the load acting on the motor drive line 12L1 when the swing arm 16 swings, etc.

[0051] Furthermore, the vehicle body frame 11 has a subframe 31 that supports the PDU 100, and the second clamp 103 is supported by the subframe 31, making it easier to arrange the vehicle width direction wiring portion 12Lb without contacting the vehicle body frame 11 including the subframe 31. Furthermore, since the second clamp 103 is supported by utilizing the subframe 31 that supports the PDU 100, it is possible to reduce the number of dedicated parts for supporting the second clamp 103 and simplify the support structure.

[0052] Furthermore, as shown in Figure 10, when viewed in the fore-and-aft direction of the vehicle body, the lower edge SL of the opening 16k is located below the pivot shaft 33, so the motor drive line 12L1 can be routed compactly using the opening 16k located below the pivot shaft 33, making it easier to form the fore-and-aft direction routing section 12La.

[0053] The above-described embodiment shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and the configuration of details, etc. may be changed as appropriate. FIG. 12 is a diagram showing a wiring structure of a motor drive line 12L1 according to a modified example. In this modified example, the fixing position of the vehicle widthwise wiring portion 12Lb is particularly different from the above-described embodiment. As shown in FIG. 12, a third clamp 105 supporting the vehicle widthwise wiring portion 12Lb is fixed to the front surface of the wall portion 16w via a plurality of fastening members 106. With this configuration, the vehicle widthwise wiring portion 12Lb is supported by the front surface of the wall portion 16w, and the third clamp 105 supporting the vehicle widthwise wiring portion 12Lb is provided on the front surface of the wall portion 16w. Therefore, the vehicle widthwise wiring portion 12Lb is positioned closer to the first surface portion 16w1. Therefore, a compact loop can be formed from the front-rear direction wiring portion 12La to the vehicle widthwise wiring portion 12Lb. Therefore, even if the saddle-ride type vehicle 10 is a small vehicle with a narrower front-rear space between the swing arm 16 and the PDU 100, the loop of the motor drive line 12L1 can be formed, and the load acting on the motor drive line 12L when the swing arm 16 swings can be reduced.

[0054] In addition, the third clamp 105 allows the position of the vehicle width direction wiring portion 12Lb to be set based on the first surface portion 16w1, so that the vehicle width direction wiring portion 12Lb can be compactly arranged by utilizing the space in front of the first surface portion 16w1 without coming into contact with the wall portion 16w including the first surface portion 16w1. Furthermore, since the fastening member 106 for fixing the third clamp 105 is exposed in front of the first surface portion 16w1, the fastening member 106 is easily accessible from the outside, and the third clamp 105 can be easily attached and detached.

[0055] The first clamp 101 is an example of a "first support portion" of the present invention, the second clamp 103 is an example of a "second support portion" of the present invention, and the third clamp 105 is an example of a "wall front support portion" of the present invention, and the shape and structure of each of the clamps 101 to 103 may be changed as appropriate. The position and orientation of the motor drive line 12L1 may also be changed as appropriate, and a wide range of known support structures can be applied to the support structure of the motor drive line 12L1. Furthermore, although the present invention has been described as being applied to a motorcycle as shown in FIG. 1 and other figures, the present invention is not limited to this and may be applied to any saddle-ride type electric vehicle. Note that saddle-ride vehicles are not limited to two-wheeled vehicles, but may also be three-wheeled vehicles, four-wheeled vehicles, etc. The power supply unit of the present invention is not limited to PDU 100, and a wide variety of known configurations for supplying power to the motor 12 are applicable. The motor wiring of the present invention is not limited to three-phase motor drive line 12L1, and a wide variety of known motor wiring is applicable.

[0056] [Configuration supported by the above embodiment]

[0057] (Configuration 1) A saddle-ride type electric vehicle including a swing arm that is swingably supported on a swing shaft provided on a body frame and that supports a rear wheel, a seat on which an occupant sits, a motor attached to the swing arm and that drives the rear wheel, a power supply unit attached to the body frame and that supplies power to the motor, and motor wiring that electrically connects the power supply unit and the motor, wherein the power supply unit is located in an area between the swing shaft and a front end of the seat in the vehicle longitudinal direction, and the swing arm has a wiring housing portion through which the motor wiring passes, a wall portion that is located forward of the wiring housing portion, and an opening that 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, passing below the swing shaft toward the power supply unit, has a longitudinal routing portion that is routed along the vehicle longitudinal direction, and a vehicle width routing portion that is connected to the longitudinal routing portion and that is routed along the vehicle width direction. According to this configuration, even if the power supply unit is disposed in a position close to the motor, the load acting on the motor wiring when the swing arm swings can be reduced.

[0058] (Configuration 2) A saddle-type vehicle as described in Configuration 1, wherein the wall portion has a first surface portion extending vertically and horizontally of the vehicle body, and a second surface portion intersecting the first surface portion at the opening side and extending longitudinally and horizontally of the vehicle body, and the longitudinal routing portion is inclined downward toward the front of the vehicle body along the second surface portion. According to this configuration, it is easy to form a loop including the longitudinal routing portion and the vehicle width direction routing portion.

[0059] (Configuration 3) The saddle-ride type vehicle according to Configuration 2, further comprising a first support portion that supports the longitudinal wiring portion along the second surface portion. According to this configuration, the front-rear direction wiring portion can be easily arranged along the second surface portion without contacting the wall portion including the second surface portion.

[0060] (Configuration 4) The saddle-ride type vehicle according to Configuration 3, further comprising a second support portion that supports the vehicle width direction wiring portion at a position lower than the opening. According to this configuration, it is easy to form a loop including the longitudinal routing portion and the transverse routing portion.

[0061] (Configuration 5) The saddle-ride type vehicle according to Configuration 4, wherein the first support portion is supported by the wall portion and supports the longitudinal routing portion toward the front side of the vehicle body and toward one side in the vehicle width direction. With this configuration, the longitudinal wiring section does not come into contact with the wall portion, and can be easily formed long by utilizing the limited space in front and behind the vehicle body. This makes it easier to form a loop that includes the longitudinal wiring section and the vehicle width wiring section, and effectively suppresses the load acting on the motor drive line when the swing arm swings, etc.

[0062] (Configuration 6) The saddle-ride type vehicle according to Configuration 4 or 5, wherein the body frame has a subframe that supports the power supply unit, and the second support unit is supported by the subframe. This configuration makes it easier to arrange the vehicle width direction wiring portion without contacting the vehicle body frame 11 including the subframe. Also, it is possible to reduce the number of dedicated parts for supporting the second clamp and simplify the support structure.

[0063] (Configuration 7) The saddle-ride type vehicle according to any one of configurations 1 to 6, wherein a lower edge of the opening is located below the swing shaft when viewed in the front-rear direction of the vehicle body. According to this configuration, the motor wiring can be routed compactly by utilizing the opening below the swing shaft, making it easier to form a longitudinal routing section.

[0064] (Configuration 8) The vehicle width direction wiring portion is supported by a front surface of the wall portion, and the vehicle width direction wiring portion is attached to the front surface of the wall portion. cable 4. The saddle-ride type vehicle according to any one of configurations 1 to 3, further comprising a wall front support portion for supporting the seat portion. With this configuration, the vehicle width direction wiring section can be arranged compactly by utilizing the space in front of the wall section without contacting the wall section, and a loop can be formed compactly from the front-rear direction wiring section to the vehicle width direction wiring section. [Explanation of symbols]

[0065] 10 Saddle-type vehicle 11 Body frame 12 motors 12a Motor shaft 12L1 Motor drive line (motor wiring) 12L2 wiring 12La Anteroposterior wiring section 12Lb Vehicle width direction wiring section 12Lc Vertical wiring section 13 Front wheel 15 rear wheel 16 Swing arm (drive unit) 16a Wiring compartment 16w wall 16w1 First side 16w2 2nd side 16k aperture 31 Subframe 32 Pivot part 33 Pivot shaft (swinging shaft) 100 PDU (power supply unit) 101 First clamp (first support part) 102, 104 Fastening members 103 Second clamp (second support part) 105 Third clamp (vehicle width direction wiring section)

Claims

1. a swing arm (16) that is swingably supported on a swing shaft (33) provided on the vehicle body frame (11) and that supports a rear wheel (15); a seat (17) on which an occupant sits; a motor (12) attached to the swing arm (16) and driving the rear wheel (15); a power supply unit (100) attached to the vehicle body frame (11) and supplying power to the motor (12); a motor wiring (12L1) that electrically connects the power supply unit (100) and the motor (12), 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 vehicle longitudinal direction, the swing arm (16) has 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 (16k) located above the wall portion (16w) and through which the motor wiring (12L1) passes, The portion of the motor wiring (12L1) that extends from the opening (16k) and passes under the swing shaft (33) toward the power supply unit (100) has a longitudinal direction wiring portion (12La) that is routed along the longitudinal direction of the vehicle body, and a vehicle width direction wiring portion (12Lb) that is connected to the longitudinal direction wiring portion (12La) and routed along the vehicle width direction. Saddle-type electric vehicle.

2. The wall portion (16w) has a first surface portion (16w1) extending in the vertical and horizontal directions of the vehicle body, and a second surface portion (16w2) intersecting the first surface portion (16w1) on the opening portion (16k) side and extending in the longitudinal and horizontal directions of the vehicle body, The longitudinal wiring portion (12La) is inclined downward toward the front side of the vehicle body along the second surface portion (16w2). The saddle-type electric vehicle according to claim 1 .

3. A first support portion (101) that supports the front-rear direction wiring portion (12La) along the second surface portion (16w2) is provided. The saddle-type electric vehicle according to claim 2.

4. a second support portion (103) for supporting the vehicle width direction wiring portion (12Lb) at a position lower than the opening portion (16k); The saddle-type electric vehicle according to claim 3.

5. The first support portion (101) is supported by the wall portion (16w) and supports the longitudinal wiring portion (12La) toward the front side of the vehicle body and toward one side in the vehicle width direction.

5. The saddle-ride type electric vehicle according to claim 4.

6. The vehicle body frame (11) has a subframe (31) that supports the power supply unit (100), The second support portion (103) is supported by the subframe (31).

6. The saddle-ride type electric vehicle according to claim 4 or 5.

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

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

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