TWI751486B - Saddle-ride type electric vehicle - Google Patents

Abstract

A saddle-riding electric vehicle (1) of the present invention includes: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) for controlling the electric motor (30); a rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and a footrest (9) for the rider to place their feet; the above-mentioned battery ( 40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the foot pedal (9), and the rear shock absorber (7) is connected to the battery (40) in a side view. ) are configured in an overlapping manner.

Description

Straddle-type electric vehicle

The present invention relates to a straddle-type electric vehicle. This application claims priority based on International Application No. PCT/JP2019/005036 filed on February 13, 2019, the content of which is incorporated herein by reference.

For example, Patent Document 1 discloses an electric scooter in which a controller of a power system is arranged under a seat. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 08-301167

(The problem that the invention intends to solve)

In addition, in the electric scooter of Patent Document 1, the controller is disposed under the seat at a position farther upward than the foot pedal. Therefore, the distance between the controller and the battery under the floor and the electric motor of the swing unit becomes longer. When using a high-voltage battery, the controller, battery and electric motor need to be connected with high-voltage lines respectively. Therefore, if the controller, the battery, and the electric motor are separated from each other, it is difficult to arrange the high-voltage line, and the cost and weight are increased. In addition, the electric scooter of Patent Document 1 does not disclose the rear shock absorber that supports the swing unit, but it is desired to efficiently arrange the rear shock absorber together with the controller and the battery.

Therefore, an object of the present invention is to suppress an increase in cost and weight in a saddle-riding type electric vehicle provided with a footrest by making efforts in the arrangement of components. (Technical means to solve problems)

One aspect of the present invention is a straddle-type electric vehicle (1), comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) ), which controls the above-mentioned electric motor (30); the rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and the foot pedal (9), which is used for riding The above-mentioned battery (40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the above-mentioned footboard (9), and the above-mentioned rear shock absorber (7) is located on the side It is arranged so as to overlap with the above-mentioned battery (40). According to this configuration, the battery, the control device, and the rear shock absorber are collectively arranged below the upper end of the footrest. Thereby, the center of gravity of the vehicle can be lowered, and the degree of freedom of the structure of the vehicle body above the footrest can be improved. The battery and the control device are arranged under the bottom plate. Thereby, the high-voltage line connecting the battery and the control device can be shortened, and cost reduction and weight reduction can be achieved. The rear shock absorber is arranged under the floor. Thereby, compared with the case where the rear shock absorber protrudes from the floor, the frame structure of the rear part of the vehicle body can be reduced in size, and the weight of the entire vehicle body frame can be reduced. The rear shock absorber can be arranged under the pedal so as to converge within the upper and lower widths of the battery. Thereby, compared with the structure in which the rear shock absorber stands up above the pedal, the degree of freedom of the structure of the vehicle body higher than the pedal can be improved.

One aspect of the present invention is a straddle-type electric vehicle (1), comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) ), which controls the above-mentioned electric motor (30); the rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and the foot pedal (9), which is used for riding The above-mentioned battery (40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the above-mentioned footboard (9), and the above-mentioned vehicle body frame (11) is provided with: a head pipe (12), which steerably supports the front wheel (3); a lower frame (13), which extends downward from the above-mentioned head pipe (12); a first lower frame (14a), which extends from the above-mentioned downward frame (13) The lower end portion extends rearwardly below the footrest (9); the second lower frame (14b) branches from the first lower frame (14a) and extends backwards below the footrest (9). and a gusset member (14c), which is arranged at the branch portion of the first lower frame (14a) and the second lower frame (14b); the rear shock absorber (7) is connected to the above-mentioned gusset member (14c) . According to this configuration, the battery, the control device, and the rear shock absorber are collectively arranged below the upper end of the footrest. Thereby, the center of gravity of the vehicle can be lowered, and the degree of freedom of the structure of the vehicle body above the footrest can be improved. The battery and the control device are arranged under the bottom plate. Thereby, the high-voltage line connecting the battery and the control device can be shortened, and cost reduction and weight reduction can be achieved. The rear shock absorber is arranged under the floor. Thereby, compared with the case where the rear shock absorber protrudes from the floor, the frame structure of the rear part of the vehicle body can be reduced in size, and the weight of the whole vehicle body frame can be reduced. The first lower frame and the second lower frame are branched below the footboard, and a rear shock absorber is connected to the gusset member that reinforces the branched portion. Thereby, a firm frame structure can be provided below the footboard to improve the support rigidity of the rear shock absorber.

In one aspect of the present invention, the first lower frame (14a), the second lower frame (14b) and the gusset member (14c) are respectively provided as a pair of left and right, forming a pair of left and right lower frames (14). The above-mentioned battery (40) is arranged between a pair of left and right lower frames (14). According to this configuration, since the battery is arranged between the pair of left and right lower frames, the influence of the interference from the left and right outer sides on the battery can be suppressed.

In one aspect of the present invention, the vehicle body frame (11) includes a connection frame (17) that connects the rear ends of the first lower frame (14a) and the second lower frame (14b) to each other. The first lower frame (14a), the second lower frame (14b) and the connecting frame (17) form a triangular closed structure portion (18) in side view. According to this configuration, the triangular-shaped closed structure portion is formed in the vehicle body frame below the footrest, so that the rigidity of the frame structure of the lower portion of the vehicle body can be efficiently secured.

In one aspect of the present invention, the electric motor (30) is an in-wheel motor disposed on the inner peripheral side of the rear wheel (4). According to this structure, compared with the case where an electric motor is arrange|positioned in the lower part of a vehicle body frame or a swing arm, the following effects are exhibited. That is, the structure of the lower part of the vehicle body frame and the swing arm can be simplified, the arrangement space of other parts in the same part can be ensured, and the weight can be reduced.

One aspect of the present invention is a straddle-type electric vehicle (1), comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) ), which controls the above-mentioned electric motor (30); the rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and the foot pedal (9), which is used for riding The above-mentioned battery (40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the above-mentioned foot pedal (9), and the above-mentioned electric motor (30) is arranged on the rear wheel (4) The in-wheel motor on the inner peripheral side, and the control device (32) is arranged on the swing arm (21). According to this configuration, the battery, the control device, and the rear shock absorber are collectively arranged below the upper end of the footrest. Thereby, the center of gravity of the vehicle can be lowered, and the degree of freedom of the structure of the vehicle body above the footrest can be improved. The battery and the control device are arranged under the bottom plate. Thereby, the high-voltage line connecting the battery and the control device can be shortened, and cost reduction and weight reduction can be achieved. The rear shock absorber is arranged under the floor. Thereby, compared with the case where the rear shock absorber protrudes from the floor, the frame structure of the rear part of the vehicle body can be reduced in size, and the weight of the whole vehicle body frame can be reduced. The electric motor is an in-wheel motor. Thereby, compared with the case where an electric motor is arrange|positioned in the lower part of a vehicle body frame or a swing arm, the following effects are exhibited. That is, the structure of the lower part of the vehicle body frame and the swing arm can be simplified, the arrangement space of other parts in the same part can be ensured, and the weight can be reduced. In one aspect of the present invention, the control device (32) is disposed further behind the vehicle than the battery (40) and the rear shock absorber (7).

In one aspect of the present invention, on a straight line (T1) connecting the axle centers (3b, 4b) of the front wheel (3) and the rear wheel (4) in side view, the battery (40), the control A device (32) and an electric motor (30). According to this configuration, the high-voltage line connecting each of the battery, the control device, and the electric motor can be easily arranged, and the high-voltage line can be shortened.

In one aspect of the present invention, a seat portion (8) for a rider to sit on is provided, the vehicle body frame (11) is provided with a seat portion support portion (15) for supporting the seat portion (8), and the seat portion support portion is provided. (15) is located further down than the upper end height (L1) of the front wheel (3) and the rear wheel (4). According to this configuration, the seat support portion of the vehicle body frame is positioned below the upper end of the wheel, so that the seat load is input to the low position of the vehicle body frame. Therefore, a strong frame structure can be concentrated on the lower part of the vehicle body frame. (Compared to the efficacy of the prior art)

According to the aspect of the present invention, in the saddle-riding type electric vehicle provided with the pedals, the increase in cost and weight can be suppressed by making efforts in the arrangement of parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, unless otherwise stated, the directions such as front, rear, left, right, etc. in the following description are assumed to be the same as the directions of the vehicles described below. In addition, in the part of the figure used in the following description, the arrow FR which shows the front of a vehicle, the arrow LH which shows the left of the vehicle, and the arrow UP which shows the upper direction of a vehicle are shown.

＜Overall vehicle＞ In FIGS. 1 and 2 , as an example of a straddle-type electric vehicle, a unit swing type motorcycle (straddle-type vehicle) 1 is displayed. The motorcycle 1 includes a front wheel 3 as a steering wheel, and a rear wheel 4 as a drive wheel. The front wheel 3 is supported by a pair of left and right front forks 6 and can be steered by the lever handle 2 . Between the left and right front forks 6, a front fender 6a is supported. In the figure, reference numeral 3a denotes a front wheel axle, reference numeral 3b denotes the axis (central axis) of the front wheel axle 3a, reference numeral 4a denotes a rear wheel axle, and reference numeral 4b denotes the axis (central axis) of the rear wheel axle 4a.

The rear wheel 4 is supported by the swing unit 20 and can be driven by the electric motor 30 . The swing unit 20 includes an electric motor 30 as a drive source, and supports the rear wheel 4 as a drive wheel so as to be able to swing up and down. The electric motor 30 is, for example, an in-wheel motor arranged on the inner peripheral side of the rear wheel 4 coaxially with the rear wheel 4 . A rear brake 31 is arranged on the right side of the electric motor 30 .

The steering system components including the lever handle 2 , the left and right front forks 6 and the front wheels 3 are steerably supported by the head pipe 12 at the front end of the vehicle body frame 11 . The swing unit 20 and the rear wheel 4 are supported by the pivot portion 16 a of the lower part of the vehicle body frame 11 so as to be able to swing up and down. The front case 5 is attached to the front part of the vehicle body frame 11 .

Referring to FIGS. 5 and 6 at the same time, a pedal panel 9b forming a substantially horizontal pedal surface 9a is attached to the lower part of the vehicle body frame 11 . The pedal panel 9b is supported by the battery case 41 below it, the left and right lower frames 14 of the vehicle body frame 11, and the like. The pedal panel 9b forms a footrest 9 on which a rider sitting on the seat 8 places his/her feet. The footboard 9 forms a flat pedal surface 9a over the entire width in the vehicle width direction. Thereby, the degree of freedom of the position where the rider places the feet is improved, and the stackability of articles is improved. The rear portion of the footrest 9 is gradually raised obliquely upward and rearward.

Above the rear end of the footboard 9, a seat tube 8a is erected upward. A seat portion 8 on which a rider sits is supported on the seat tube 8a. For example, the lower end portion of the seat tube 8a is rotatably connected to the vehicle body frame 11 (eg, the first horizontal frame 15 and the seat support portion described below) via a hinge shaft 8b along the left-right direction. For example, the seat tube 8a and the seat portion 8 are rotated around the hinge shaft 8b, thereby preventing items such as helmets placed on the footrests 9 from being taken out. If it is a structure which can lock the rotation of the seat tube 8a in this state, the article mounting part on the footrest 9 can be locked.

＜Body frame＞ As shown in FIGS. 1 to 4 and 7 , the vehicle body frame 11 is formed by integrally joining a plurality of frame members by welding or the like. The vehicle body frame 11 includes: a head pipe 12 at the front end; a single down frame 13 extending downward from the head pipe 12; A first lower frame 14a; a pair of left and right second lower frames 14b extending upward and rearward from the front and rear middle parts of the left and right first lower frames 14a; A horizontal frame 15; a second horizontal frame 16 spanning between the rear ends of the left and right second lower frames 14b; 17. For example, each frame member is constituted by a round steel pipe. The center line CL in FIG. 7 represents the left and right center of the vehicle body.

The head pipe 12 , the down frame 13 and the connection frame 17 are respectively arranged at the left and right centers of the vehicle body (arranged so that the central axis is located at the left and right centers of the vehicle body). The first lower frame 14a, the second lower frame 14b, and the connecting frame 17 form a triangular closed structure portion 18 (frame structure portion) in a side view of the vehicle body frame 11. On both ends of the second horizontal frame 16, pivot portions 16a are provided. The connecting frame 17 is provided at the left and right center of the vehicle body in a single unit. The connection frame 17 may be provided as a pair of left and right, similarly to the first lower frame 14a and the second lower frame 14b. The "intermediate" in this application not only refers to the center between the two ends of the object, but also includes the range of the inner side between the two ends of the object.

On the left and right sides of the vehicle body, the front and rear intermediate portions of the first lower frame 14a and the front portion of the second lower frame 14b are connected via gussets 14c. The gussets 14c are provided as a pair on the left and right. The right gusset 14c is provided with a shock absorber front connecting portion 14d that connects the front end portion of the rear shock absorber 7 . The rear shock absorber 7 is disposed so as to overlap the battery case 41 and the rear of the battery 40 in a side view. The front part of the rear shock absorber 7 and the rear part of the battery 40 are arranged side by side in the vehicle width direction (see FIG. 7 ). The rear shock absorber 7 is arranged so as to be positioned lower than the upper end (pedal surface 9a) of the footboard 9 as a whole in a side view.

A pair of left and right lower frames 14 are formed on the lower part of the vehicle body frame 11 . The pair of left and right lower frames 14 is constituted by a first lower frame 14a, a second lower frame 14b, and a gusset 14c on the left and right sides of the vehicle body. A battery case 41 for accommodating the battery 40 is arranged between the left and right lower frames 14 in the vehicle width direction. Reference numeral 19 in the figure denotes a horizontal plate 19 spanning between the left and right lower frames 14 . The horizontal plate 19 is bent into a rectangular shape open upward so as to follow the outer periphery of the lower front part of the battery 40 . The horizontal plate 19 supports the lower front portion of the battery 40 from below.

<Swing unit> As shown in FIGS. 1 to 4 , the swing unit 20 includes a swing arm 21 as a skeleton. The swing arm 21 includes a pair of left and right arm portions 22 and 23 for fixedly supporting the electric motor 30 and the rear wheel 4 at both ends. The swing arm 21 may have an arm portion only on the left and right sides, and the electric motor 30 and the rear wheel 4 may be fixedly supported at one end.

The electric motor 30 is driven by the power of the battery 40 . The electric motor 30 is driven by a variable speed controlled by, for example, VVVF (variable voltage variable frequency). The electric motor 30 performs shifting control such as having a continuously variable transmission, but is not limited to this. For example, the electric motor 30 may also perform shifting control such as with a step-variable transmission. The swing unit 20 may include, for example, a reduction gear using a gear or the like.

The front end portion 24 of the swing arm 21 is supported by the pivot portion 16 a of the vehicle body frame 11 so as to be able to swing up and down via the pivot shaft 21 a along the left-right direction. The front part located between the front end part 24 of the swing arm 21 and the front end of the rear wheel 4 is provided as a lateral part 25 extending wider than the rear wheel 4 in the vehicle width direction. The lateral portion 25 includes a front end inclined portion 25a extending obliquely rearward and upward from the front end portion 24 in a side view; an upper flat portion 25b extending substantially horizontally rearward from the upper end of the front end inclined portion 25a; and substantially horizontally from the front end portion 24 The lower flat portion 25c extends rearward; the rear end curved portion 25d extends in the vertical direction across the rear ends of the upper and lower flat portions 25b and 25c; The rear end curved portion 25d is curved in plan view so as to follow the tire tread of the rear wheel. Inside the lateral portion 25, a receiving portion 26 of the power control unit (control device) 32 is provided.

The rear end portion of the rear shock absorber 7 extending in the front-rear direction is connected to the upper end portion (swinging portion distant from the pivot shaft 21a ) on the left and right sides (right side in the embodiment) of the front end inclined portion 25a. A rear shock absorber connecting portion 27 for connecting the rear end portion of the rear shock absorber 7 is provided at the upper right end portion of the front end inclined portion 25a. The rear shock absorber 7 is arranged at the same vertical height as the battery 40 . The rear end portion of the rear shock absorber 7 is connected to the shock absorber rear connecting portion 27 of the swing arm 21 so as to be rotatable about the axis of the connecting shaft in the left-right direction. The rear shock absorber 7 is arranged in a recumbent posture so that the stroke axis faces the front-rear direction. The front end portion of the rear shock absorber 7 is connected to the shock absorber front connecting portion 14d on the right side of the lower portion of the vehicle body frame 11 . The front end portion of the rear shock absorber 7 is connected to the shock absorber front connecting portion 14d of the vehicle body frame 11 so as to be rotatable around the axis of the connecting shaft in the left-right direction.

Each of the left and right arm portions 22 and 23 is formed with upper edge portions 22a and 23a extending substantially horizontally from the left and right outer sides of the upper flat portion 25b of the transverse portion 25 toward the rear, and from the left and right outer sides of the lower flat portion 25c of the transverse portion 25 toward the rear. The lower edge portions 22b and 23b are extended obliquely by raising the rear. At the rear ends of the left and right arm portions 22 and 23, axle support portions 22c and 23c for supporting the left and right ends of the rear wheel axle 4a are respectively provided.

The front lower end of the rear fender 28a is supported on the upper end of the rear end curved portion 25d. The rear fender 28a extends in a circular arc shape from the front lower end to the rear upper portion of the rear wheel in a side view. The rear upper portion of the rear fender 28a is supported by the front end portion of a fender support stay 28 extending rearward and upward from the rear upper portion of the left and right arm portions 22 and 23 of the swing arm 21 . Reference numeral 29 in the figure denotes a main bracket supported on the rear end portion below the transverse portion 25 .

The foot pedal 9 includes a pedal cover 9c surrounding the outer periphery of the pedal panel 9b. The pedal cover 9c covers the front portion of the first lower frame 14a and the periphery of the second lower frame 14b. Above the footboard 9, the space between the lever handle 2 and the seat 8 is opened upward and in the vehicle width direction. Thereby, it is easy for the rider to step on the vehicle body, and it is easy to load and unload items. "Flat" in the present application means that there is substantially no large step difference or curvature, etc., including the existence of a gentle curve, unevenness for fixation or reinforcement, and the like.

＜Battery＞ As shown in FIGS. 3 to 6 , the battery 40 is mounted under the pedal surface 9a. The battery 40 has a rectangular cross-sectional shape (for example, a substantially square shape) and is formed in a prismatic shape (rectangular parallelepiped shape) extending in the longitudinal direction. The battery 40 is arranged with the longitudinal direction facing the front-rear direction. The battery 40 is arranged across the left and right center of the vehicle body in a plan view. The left and right centers of the battery 40 are aligned with the left and right centers of the vehicle body in plan view. The battery 40 produces a predetermined high voltage (eg, 48 V). The battery 40 is a chargeable and dischargeable energy storage device, for example, a lithium-ion battery.

The battery 40 is connected to a power control unit (PCU) 32 via a contactor (electromagnetic switch). The power control unit 32 is integrally provided with a PDU (Power Driver Unit, power drive unit) and an ECU (Electric Control Unit, power control unit). Power from the battery 40 is supplied to the PDU as a motor driver and converted from DC to three-phase AC. The converted power is supplied to the electric motor 30 which is a three-phase AC motor. A three-phase cable (not shown) extends from the PDU, and the three-phase cable is connected to the electric motor 30 . The electric motor 30 performs power operation according to the control of the PDU, so as to drive the vehicle. The ECU controls charging and discharging of the battery 40 , and switches between supplying power to the battery 40 and discharging from the battery 40 .

The battery 40 is inserted and removed from above with respect to the battery case 41 fixed to the vehicle body. The battery case 41 has a battery insertion opening 41a opened upward. On the battery case 41, a pedal panel 9b for opening and closing the battery insertion/extraction port 41a is attached. The pedal panel 9b includes, for example, a hinge portion 9d at a rear end portion, and rotates around an axis along the vehicle width direction to open and close the battery insertion/extraction port 41a. The pedal panel 9b forms a pedal surface 9a in a state in which the battery insertion/extraction port 41a is closed. A locking mechanism for restricting the upward movement (disengagement) of the battery 40 inserted into the casing is provided in the battery insertion and extraction port 41a. The pedal panel 9b may open and close the battery insertion/extraction port 41a as a detachable type in addition to the hinge opening and closing type.

For example, the battery 40 is charged by a charger outside the vehicle when the battery 40 is removed from the vehicle body. The battery 40 can also be charged by a charger connected to an external power source in a state mounted on the vehicle body. The battery 40 includes a BMU (Battery Managing Unit) that monitors charge and discharge conditions, temperature, and the like. When the battery 40 is mounted on the vehicle body, the information monitored by the BMU is shared with the ECU. The output request information from the accelerator sensor is input into the ECU. The ECU drives and controls the electric motor 30 via the PDU based on the inputted output request information.

5 and 6 , when the battery 40 is taken out from the battery case 41, the pedal panel 9b is first opened to open the battery insertion and extraction port 41a. In addition, the lock of the lock mechanism against the disengagement of the battery 40 is released. In FIG. 6, illustration of the pedal panel 9b is omitted. After that, the battery 40 is rotated in a tilted posture (represented by a two-dot chain line in FIG. 6 ) raised forward, and the front upper part of the battery 40 is pulled out of the battery case 41 . For example, when the battery 40 is rotated in an inclined posture raised forward, a belt attached to the battery 40 or the like may be used. After that, the battery 40 is taken out from the vehicle body by moving the battery 40 upward.

When the battery 40 is accommodated in the battery case 41, first, the pedal panel 9b is opened to open the battery insertion/extraction port 41a. The battery 40 in the inclined posture raised in the front is inserted into the battery insertion opening 41a from the rear lower part. Next, the battery 40 is housed in the battery case 41 as a whole by rotating the battery 40 with the rear lower part as a fulcrum to move the front upper part downward. Next, the disengagement of the battery 40 is locked by the locking mechanism. In addition, the pedal panel 9b is closed to close the battery insertion and extraction port 41a, so that the storage of the battery 40 is completed.

A handle for extracting the battery 40 is provided on the top of the battery 40 facing upward and forward in the above-mentioned inclined posture. A battery-side connecting terminal (not shown) is detachably provided on the bottom of the battery 40 facing the rear and downward in the above-mentioned inclined posture. On the bottom wall portion located at the rear end of the battery case 41, a case-side connection terminal 42 to which the above-mentioned battery-side connection terminal is detachably connected is provided. The connection terminal 42 on the case side is rotated when the battery 40 is inserted and removed, so that the connection terminal on the battery side can be attached or detached. The battery case 41 may be configured such that the connection terminals 42 on the case side are exposed or hidden according to the locking operation of the locking mechanism, and the connection terminals on the battery side can be attached and detached.

Referring to FIGS. 3 and 4 , at the lower portion behind the battery case 41 , a cable extraction portion 41 b is provided. The cable extraction portion 41b is provided for extracting the output cable (high-voltage line) 43 extending from the housing-side connection terminal 42 to the outside of the housing. The output cable 43 drawn out of the case from the cable take-out portion 41b is inserted into the front portion (lateral portion 25 ) of the swing unit 20 close to the rear of the battery case 41 . The output cable 43 is connected to the power control unit 32 within the transverse portion 25 .

The operation of the locking mechanism and the insertion and removal of the battery 40 are manual, and the battery 40 can be installed and removed from the vehicle body without tools. The battery 40 is a mobile battery (portable battery) that can be attached to and detached from the vehicle body. The battery 40 can be charged by a charger outside the vehicle, or used as a portable battery in the form of a power source of an external device, etc., and can be used alone.

Left and right lower frames 14 of the vehicle body frame 11 are arranged on the left and right outer sides of the battery 40 and the battery case 41 . The battery 40 is arranged in a space (inward in the left-right direction of the left and right frame members) sandwiched by the left and right frame members. The battery 40 is arranged so as to overlap at least a part of the left and right frame members in a side view. Thereby, the influence on the battery 40 of the disturbance from the outside in the vehicle width direction can be suppressed.

As shown in FIGS. 1 to 4 , in the motorcycle 1 , the battery 40 , the power control unit 32 , and the rear shock absorber 7 are arranged below the upper end (pedal surface 9 a ) of the footboard 9 . That is, the battery 40, the power control unit 32, and the rear shock absorber 7 are arranged so as to be positioned below the pedal surface 9a as a whole. Thereby, the center of gravity of the vehicle is reduced, and the structure of the vehicle body above the footboard 9 is reduced. Thereby, for example, the article mounting part on the footboard 9 can be enlarged, and the usability of the space above the footboard 9 can be improved. In the motorcycle 1, the upper end of the footboard 9 may be set as the arrangement position of the first horizontal frame 15 above the pedal surface 9a. It is also possible to arrange the battery 40 , the power control unit 32 and the rear shock absorber 7 below the arrangement position of the first horizontal frame 15 . Instead of the power control unit 32 , the PDU and the ECU may be separately provided, and only the PDU may be arranged under the pedal.

The straight line which connects the axles 3a and 4a of the front wheel 3 and the rear wheel 4 in a side view is shown by the code|symbol T1 (refer FIG. 1, FIG. 2). The straight line T1 is arranged to overlap with the battery 40 , the power control unit 32 and the electric motor 30 in a side view. That is, the battery 40, the power control unit 32, and the electric motor 30 are arranged in a straight line in a side view. Thereby, the high-voltage line connecting each of the battery 40, the power control unit 32, and the electric motor 30 can be shortened. The rear shock absorber 7 is arranged above the straight line T1 in a side view.

The vehicle body frame 11 includes a first lateral frame 15 as a seat support portion that supports the seat portion 8 . The first horizontal frame 15 is located further below than a straight line (upper end height) L1 spanning between the upper ends of the front wheel 3 and the rear wheel 4 in a side view. Thereby, the riding load etc. input to the seat part 8 are input to the low position of the vehicle body frame 11. The vehicle body frame 11 of the present embodiment improves the frame rigidity of the lower part of the vehicle body, so that the seat load can be efficiently supported.

As described above, the two-wheeled locomotive 1 of the above-described embodiment includes: the electric motor 30 for running the vehicle; the battery 40 for supplying electric power to the electric motor 30; the power control unit 32 for controlling the electric motor 30; The rear shock absorber 7 between the swing arm 21 and the foot pedal 9 for the rider to place their feet; the battery 40 , the power control unit 32 and the rear shock absorber 7 are arranged at the upper end of the foot pedal 9 (For example, the pedal surface 9a) is further downward.

According to this configuration, the battery 40 , the power control unit 32 , and the rear shock absorber 7 are collectively arranged below the upper end (pedal surface 9 a ) of the footrest 9 . Thereby, the center of gravity of the vehicle can be lowered, and the degree of freedom of the structure of the vehicle body above the footboard 9 can be improved. Both the battery 40 and the power control unit 32 are disposed under the bottom plate. Thereby, the high-voltage line connecting the battery 40 and the power control unit 32 can be shortened, and cost reduction and weight reduction can be achieved. The rear shock absorber 7 is arranged under the floor. Thereby, compared with the case where the rear shock absorber 7 protrudes from the floor, the frame structure of the rear part of the vehicle body can be reduced in size, and the overall weight of the vehicle body frame 11 can be reduced.

In the motorcycle 1 described above, the electric motor 30 is an in-wheel motor disposed on the inner peripheral side of the rear wheel 4 . Thereby, compared with the case where the electric motor 30 is arrange|positioned in the lower part of the vehicle body frame 11 or the swing arm 21, the following effects are exhibited. That is, the structure of the lower part of the vehicle body frame 11 and the swing arm 21 can be simplified, the arrangement space of the other parts in the same part can be ensured, and the weight can be reduced.

In the motorcycle 1, the battery 40, the power control unit 32, and the electric motor 30 are arranged on a straight line T1 connecting the axle centers 3b and 4b of the front wheel 3 and the rear wheel 4 in side view. Thereby, the high-voltage line connecting each of the battery 40, the power control unit 32, and the electric motor 30 can be easily configured, and the high-voltage line can be shortened.

In the motorcycle 1 described above, the rear shock absorber 7 is disposed so as to overlap the battery 40 in a side view. Thereby, the rear shock absorber 7 can be arranged under the pedal so as to converge within the upper and lower width of the battery 40 . Thereby, compared with the structure in which the rear shock absorber 7 stands up to the top of the pedal, the degree of freedom of the structure of the vehicle body higher than the pedal 9 can be improved.

In the motorcycle 1 described above, the body frame 11 includes: a head pipe 12 that steerably supports the front wheel 3; a lower frame 13 that extends downward from the head pipe 12; and a first lower frame 14a that The lower end of the lower frame 13 extends rearwardly below the footrest 9; the second lower frame 14b branches from the first lower frame 14a and extends rearwardly below the footrest 9; and a gusset The plate 14c is provided at the branch portion of the first lower frame 14a and the second lower frame 14b; the rear shock absorber 7 is connected to the gusset plate 14c. According to this configuration, the first lower frame 14a and the second lower frame 14b are branched below the footboard 9, and the rear shock absorber 7 is connected to the gusset 14c that reinforces the branched portion. Thereby, a firm frame structure can be provided below the footboard 9 to improve the support rigidity of the rear shock absorber 7 .

In the motorcycle 1 described above, the first lower frame 14 a , the second lower frame 14 b and the gusset 14 c are respectively provided as a pair of left and right to constitute a pair of left and right lower frames 14 , and are located between the pair of left and right lower frames 14 . The above-described battery 40 is arranged. According to this configuration, since the battery 40 is arranged between the pair of left and right lower frames 14, the influence of the interference from the left and right outer sides on the battery 40 can be suppressed.

In the motorcycle 1 described above, the vehicle body frame 11 includes a connecting frame 17 connecting the rear ends of the first lower frame 14a and the second lower frame 14b to each other, the first lower frame 14a, the second lower frame 14b and the connecting frame 17. The frame 17 forms a triangular closed structure portion 18 in a side view. According to this configuration, the triangular closed structure portion 18 is formed on the vehicle body frame 11 under the footboard 9, so that the rigidity of the frame structure of the lower part of the vehicle body can be efficiently secured.

In the motorcycle 1 described above, the body frame 11 includes a first horizontal frame 15 that supports the seat 8 for the rider to sit on. below. Thereby, the seat part load is input to the low position of the vehicle body frame 11 . Therefore, a strong frame structure can be concentrated on the lower part of the vehicle body frame 11 .

Furthermore, the present invention is not limited to the above-described embodiment, and is not limited to the configuration in which the electric motor 30 is an in-wheel motor, for example, and the electric motor 30 may be supported by the swing arm 21 . It is not limited to the unit swing type having the electric motor 30 under the spring, and the electric motor 30 may be supported by the spring, that is, the vehicle body frame 11 . Instead of a single battery 40 , it may be configured with a plurality of batteries 40 . Straddle-type electric vehicles include all vehicles that riders ride across the body, including not only two-wheeled locomotives (including bicycles with prime movers and scooters), but also three-wheeled (except the front wheel and the rear two wheels). , also includes vehicles with two front and rear wheels) or four-wheeled vehicles. The configuration of the above-described embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as replacing the constituent elements of the embodiment with well-known constituent elements.

1: Two-wheeled locomotive (straddle-type electric vehicle) 2: Lever handle 3: Front wheel 3a: Front wheel axle 3b: Axle center 4: Rear wheel 4a: Rear wheel axle 4b: Axle center 5: Front shell 6: Front fork 6a: Front Fender 7: Rear shock absorber 8: Seat 8a: Seat tube 8b: Hinge shaft 9: Footrest 9a: Pedal surface 9b: Pedal panel 9c: Pedal cover 9d: Hinge 11: Body frame 12: Head Tube 13: Down frame 14: Lower frame 14a: First lower frame 14b: Second lower frame 14c: Gusset (gusset) 14d: Shock absorber front link 15: First horizontal frame (seat support part) 16: second horizontal frame 16a: pivot part 17: connecting frame 18: closed structure part 19: horizontal plate 20: swing unit 21: swing arm 21a: pivot shafts 22, 23: arm parts 22a, 23a: upper edge Parts 22b, 23b: Lower edge parts 22c, 23c: Axle support part 24: Front end part 25: Lateral part 25a: Front end inclined part 25b: Upper flat part 25c: Lower flat part 25d: Rear end curved part 25e: Left and right side surface parts 26 : accommodating part 27 : shock absorber rear connecting part 28 : fender support stay 28a : rear fender 29 : main bracket 30 : electric motor 31 : rear brake 32 : power control unit (control device) 40 : battery 41 : Battery case 41a : Battery insertion/removal port 41b : Cable extraction part 42 : Case side connection terminal 43 : Output cable CL : Vehicle body left and right center FR : Vehicle front L1 : Upper end height LH : Vehicle left T1 : Straight line UP: above the vehicle

Fig. 1 is a left side view of a motorcycle according to an embodiment of the present invention. Figure 2 is a right side view of the above two-wheeled locomotive. Figure 3 is a left side view of the rear lower part of the above two-wheeled locomotive. Figure 4 is a right side view of the rear lower part of the above two-wheeled locomotive. Figure 5 is a perspective view of the periphery of the pedals of the above two-wheeled locomotive. FIG. 6 is a perspective view of the state in which the pedal panel is opened from FIG. 5 . Figure 7 is a top view of the periphery of the above-mentioned foot pedal.

4: rear wheel

4a: Rear wheel axle

7: Rear shock absorber

8: seat

8a: Seatpost

8b: hinge shaft

9: Foot pedal

9a: Pedal surface

14: Lower frame

14a: First lower frame

14b: Second lower frame

14c: Gusset (gusset member)

14d: Shock absorber front link

15: The first horizontal frame (seat support part)

16: Second horizontal frame

16a: Pivot part

17: Connect the frame

18: Closed structure

19: Horizontal board

20: Swing unit

21: Swing arm

21a: Pivot

23: Arm

24: Front end

25: Transverse part

25a: Front inclined part

25b: Upper Flat

25c: Lower Flat

25d: Rear end bend

26: Containment Department

27: Shock absorber rear link

28: Fender support strut

28a: Rear Fender

29: Main bracket

30: Electric Motor

31: Rear brake

32: Power control unit (control device)

40: battery

41: battery case

41b: Cable take-out part

42: Housing side connection terminal

43: Output cable

FR: front of vehicle

UP: Above the vehicle

Claims (14)

A saddle-riding electric vehicle (1) comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) for controlling the electric motor (30); a rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and a footrest (9) for the rider to place their feet; the above-mentioned battery ( 40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the foot pedal (9), and the rear shock absorber (7) avoids the left and right center (CL) of the vehicle body It is arranged on one side in the vehicle width direction, and is arranged so as to overlap the battery (40) in a side view. A saddle-riding electric vehicle (1) comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) for controlling the electric motor (30); a rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and a footrest (9) for the rider to place their feet; the above-mentioned battery ( 40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the foot pedal (9), and the vehicle body frame (11) is provided with: a head pipe (12), which can be steered a front wheel (3) is supported on the ground; a lower frame (13) extends downward from the above-mentioned head pipe (12); A first lower frame (14a), which extends from the lower end of the above-mentioned lower frame (13) to the rear under the above-mentioned footboard (9); a second lower frame (14b), which extends from the above-mentioned first lower frame ( 14a) branches and extends rearwardly below the above-mentioned footboard (9); and a gusset member (14c), which is arranged at the branch portion of the above-mentioned first lower frame (14a) and the second lower frame (14b); in The rear shock absorber (7) is connected to the gusset member (14c). The saddle-ridden electric vehicle (1) according to claim 2, wherein the first lower frame (14a), the second lower frame (14b), and the gusset members (14c) are respectively provided as a pair of left and right to form a pair of left and right The lower frame (14) has the battery (40) disposed between the pair of left and right lower frames (14). The straddle-type electric vehicle (1) according to claim 2, wherein the vehicle body frame (11) includes a connecting frame (17) that connects the first lower frame (14a) and the second lower frame (14b) The rear ends are connected to each other, and the first lower frame (14a), the second lower frame (14b) and the connecting frame (17) form a triangular closed structure (18) in side view. The straddle-type electric vehicle (1) according to claim 3, wherein the vehicle body frame (11) includes a connecting frame (17) that connects the first lower frame (14a) and the second lower frame (14b) The rear ends are connected to each other, and the first lower frame (14a), the second lower frame (14b) and the connecting frame (17) form a triangular closed structure (18) in side view. The straddle-type electric vehicle (1) of any one of claims 1 to 5, wherein, The electric motor (30) is an in-wheel motor arranged on the inner peripheral side of the rear wheel (4). A saddle-riding electric vehicle (1) comprising: an electric motor (30) for running the vehicle; a battery (40) for supplying electric power to the electric motor (30); and a control device (32) for controlling the electric motor (30); a rear shock absorber (7), which spans between the body frame (11) and the swing arm (21); and a footrest (9) for the rider to place their feet; the above-mentioned battery ( 40), the control device (32) and the rear shock absorber (7) are arranged below the upper end of the foot pedal (9), and the electric motor (30) is arranged on the inner peripheral side of the rear wheel (4) The in-wheel motor, the swing arm (21) is provided with an arm portion (22, 23) for fixedly supporting the rear wheel (4) at both ends or at one end, and the control device (32) is arranged on the swing arm (twenty one). The saddle-riding electric vehicle (1) according to claim 7, wherein the control device (32) is disposed further behind the vehicle than the battery (40) and the rear shock absorber (7). The straddle-type electric vehicle (1) according to any one of claims 1 to 5, 7, and 8, wherein the axle centers (3b, 4b) of the front wheel (3) and the rear wheel (4) are aligned in a side view The above-mentioned battery (40), control device (32) and electric motor (30) are arranged on a straight line (T1) connected to each other. The saddle-riding electric vehicle (1) according to claim 6, wherein the straight line (T1) connecting the axle centers (3b, 4b) of the front wheel (3) and the rear wheel (4) in side view is arranged on a straight line (T1) There are the above-mentioned battery (40), control device (32) and electric motor (30). As claimed in any one of claims 1 to 5, 7, and 8, the straddle-type electric vehicle (1), The vehicle body frame (11) is provided with a seat portion (8) for the rider to sit on, and the vehicle body frame (11) is provided with a seat portion support portion (15) for supporting the seat portion (8), and the seat portion support portion (15) is located in front of the wheel. (3) and the upper end height (L1) of the rear wheel (4) are further down. The straddle-type electric vehicle (1) according to claim 6, further comprising a seat portion (8) for a rider to sit on, and the vehicle body frame (11) is provided with a seat portion support portion (8) that supports the seat portion (8). 15), the seat support portion (15) is located further down than the upper end height (L1) of the front wheel (3) and the rear wheel (4). The straddle-type electric vehicle (1) according to claim 9, further comprising a seat portion (8) for a rider to sit on, and the vehicle body frame (11) is provided with a seat portion support portion (8) that supports the seat portion (8). 15), the seat support portion (15) is located further down than the upper end height (L1) of the front wheel (3) and the rear wheel (4). The straddle-type electric vehicle (1) according to claim 10, further comprising a seat portion (8) for a rider to sit on, and the vehicle body frame (11) is provided with a seat portion support portion (8) that supports the seat portion (8). 15), the seat support portion (15) is located further down than the upper end height (L1) of the front wheel (3) and the rear wheel (4).

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