KR101482367B1 - Motor scooter type electric vehicle - Google Patents

Abstract

This scooter type electric vehicle has a body frame 11 having an elongated frame 24 extending rearward in the longitudinal direction of the vehicle than the front end of the seat 3 so that the driving lead accumulator 6a The high voltage battery 6A is supported by the extended frame 24 and the lower end of the seat 3 and the upper end of the seat 3 And the step floor 4 is disposed at a position lower than the upper surface of the high-voltage battery 6A.

Description

MOTOR SCOOTER TYPE ELECTRIC VEHICLE [0002]

The present invention relates to a scooter type electric vehicle having a lead-acid battery as a driving power source.

2. Description of the Related Art Conventionally, a scooter type electric vehicle that travels by driving a drive motor by supplying electric power to a drive motor from a drive battery is known (see, for example, Patent Document 1). In this scooter type electric vehicle, a plurality of rectangular parallelepiped batteries are arranged at a place from below the low floor portion between the steering wheel and the seat to below the seat.

Japanese Patent Application Laid-Open No. 3-224887

However, there is a lead-acid battery as a kind of battery, which is advantageous in that it can be manufactured at a lower price than various accumulators such as Ni-MH and Li-ion. Therefore, if a lead-acid battery is used as a driving battery and a lead-acid battery is provided below a low-lying bottom portion as in the conventional art, the low-bottom portion is raised to affect the ascending and descending ability. In addition, if a plurality of lead accumulators are dispersed and arranged, the wiring becomes longer and influences the layout of other components.

SUMMARY OF THE INVENTION The present invention aims at lowering the bottom portion of a scooter type electric vehicle having a lead-acid battery as a driving power source and reducing the influence on the layout of other components.

In order to solve the above problems, the present invention adopts the following means.

(1) In other words, the scooter type electric vehicle of the present invention comprises a down frame portion extending from the head pipe toward the lower rear along the vehicle longitudinal direction, and a lower frame portion extending from the lower end of the down frame portion toward the rear in the vehicle front- A body frame having a portion; A seat provided on the rear side of the head pipe in the front-rear direction of the vehicle to seat the occupant; A step floor installed between the head pipe and the seat to allow the occupant to put his foot; A driving motor for driving; And a driving lead battery for supplying electric power to the driving motor, wherein the body frame has an extension frame that extends beyond the front end of the seat toward the rear in the vehicle longitudinal direction; The driving lead acid accumulators are arranged along the vehicle width direction to constitute a high-voltage battery; The high-voltage battery is disposed only at a position below the seat and behind the front end of the seat in the vehicle longitudinal direction, in addition to being supported by the extension frame; The step floor is provided at a position lower than the upper surface of the high-voltage battery.

The scooter type electric vehicle also includes a general saddle-type vehicle having a low bottom portion, and includes not only two-wheel but also three-wheel (including front and rear rear wheels as well as front two-wheel and rear four-wheel vehicles) .

(2) The scooter type electric vehicle described in (1) above comprises: a battery case for accommodating the high-voltage battery; And an article storage box provided above the battery case and at a position below the seat.

(3) In the scooter type electric vehicle described in (1) above, the high-voltage battery may be disposed in the front-rear direction dimension of the article storage box along the vehicle longitudinal direction.

(4) In the scooter-type electric vehicle described in (1), the high-voltage battery extends to the outside of the seat along the vehicle width direction when viewed in a plan view; A passenger step for setting the foot of the rear passenger is provided continuously from the step floor on the outside of the high-voltage battery along the vehicle longitudinal direction; The vehicle frame may have a step frame extending to the outside of the high-voltage battery along the vehicle width direction, and supporting the passenger step.

(5) In the scooter-type electric vehicle described in (1) above, the extended frame extends under the high-voltage battery to the rear along the vehicle longitudinal direction; The vehicle body frame has a pair of left and right rear frames that are erected upward from a rear end of the elongated frame at a rear side along the vehicle longitudinal direction of the high-voltage battery; Wherein the swing arm constituting a part of the vehicle body frame rotatably supports the rear wheel at the rear end thereof and houses the drive motor therein and the front end portion of the swing arm extends forward and rearward of the high- The rear frame being swingably supported at a rear position along the direction of the rear frame; Configuration may be employed.

(6) In the scooter-type electric vehicle described in (1), the body frame extends upward from the extension frame in front of the high-voltage battery in the vehicle longitudinal direction, A sub-frame extending rearward in the vehicle longitudinal direction; And the subframe covers the front surface and the upper surface of the high-voltage battery, and supports the article storage box provided on the high-voltage battery.

(7) In the scooter type electric vehicle described in (1) above, each of the lead acid batteries for driving is arranged four in the vehicle width direction and connected in series to each other; Wherein each of the driving lead acid batteries has a structure in which the positive terminal and the negative terminal thereof are adjacent to each other along the vehicle longitudinal direction and in the vehicle width direction to reverse the positions of the positive electrode terminal and the negative electrode terminal in the vehicle longitudinal direction ; And the external connector of the first cable extending from the positive terminal and the negative terminal out of the driving lead acid batteries in the vehicle width direction extends from one side of the battery case accommodating the respective driving lead acid batteries The intermediate connector of the second cable for connecting the inside of the driving lead acid batteries in the vehicle width direction is exposed to the outside from the one side of the battery case there is ; Configuration may be employed.

(8) In the scooter-type electric vehicle described in (1) above, the rear end of the body frame rotatably supports the rear wheels, and the front end of the body frame is pivotable on the extension frame below the high- With a swing arm supported thereon.

(9) In the scooter-type electric vehicle described in (1) above, the vehicle further includes a seat cover for covering a lower periphery of the seat; Wherein the elongate frame extends under the high-voltage battery and extends to the rear along the vehicle longitudinal direction; Wherein the vehicle body frame has a rear frame which is inclined from a rear end of the elongated frame rearward along the vehicle longitudinal direction of the high-voltage battery toward an upper rear side along the vehicle longitudinal direction as viewed from a side; The front surface of the seat cover is installed so as to be inclined upward toward the rear side along the vehicle longitudinal direction as viewed from the side; Wherein the high-voltage battery is disposed obliquely along the front surface of the seat cover and the rear frame as viewed from the side; Configuration may be employed.

(10) In the scooter-type electric vehicle described in (1), the extended frame is constituted by a swing arm having a rear end pivotally supporting the rear wheel at the rear end thereof and a front end portion thereof pivotably supported on the lower frame portion Being; At least a portion of the high-voltage battery is disposed on the left arm and the right arm between the left arm and the right arm of the swing arm; Said drive motor and its driver being disposed within said swing arm; Configuration may be employed.

According to the scooter-type electric vehicle described in (1) above, the high-voltage battery is arranged laterally along the width direction of the vehicle body below the seat so that the high-voltage battery can be disposed behind the seat. Accordingly, the step floor can be lowered and the area can be widened. Further, by arranging the high-voltage battery including the plurality of driving lead-acid batteries, which are heavy, concentrated near the center of the vehicle body, the influence on the layout of other components can be reduced and the mass (mass) can be concentrated in the center of the vehicle body . In addition, by employing a high-voltage battery including a plurality of lead acid batteries for driving, high-voltage driving power can be ensured.

In the case of (2), the high-voltage battery including a plurality of lead acid batteries for driving can be integrally incorporated, and the installation property and the maintenance property can be improved. Further, a space above the battery case can be used as an article storage space.

In the case described in (3) above, it is possible to provide the article storage box using the space between the high-voltage battery and the seat, thereby ensuring the article storage capacity.

In the case of (4) above, by covering the outer chamber of the high-voltage battery with the step frame, the influence of the external force from the outer chamber of the high-voltage battery can be reduced.

In the case described in (5) above, since the elongated frame passes under the high-voltage battery, an external force due to the ground hit can be prevented from reaching the high-voltage battery. Further, since the swing support portion of the swing arm is provided at a position that does not overlap with the high-voltage battery from the side view, the swing arm of the swing arm can penetrate in the left-right direction (vehicle width direction) The adhesion of the swing arm can be satisfactorily secured.

In the case of (6) above, not only the lower and rear surfaces of the high-voltage battery, but also the front surface and the upper surface can be surrounded by the frame member. Further, since the subframe serves also as a support stay for the article storage box, it is possible to reduce the number of parts.

In the case of (7), the external connector of the first cable extending from the positive terminal and the negative terminal of the driving lead acid battery outside the vehicle width direction is disposed on one side of the battery case, The intermediate connector of the second cable connecting between the driving lead acid batteries located on the inner side is disposed on the same side as the respective external connectors so that when the high voltage battery is removed, the intermediate connector is cut to half the voltage, The operation of removing the external connector can be performed in the same direction, and the maintenance property can be improved.

In the case of (8), since the swinging axis of the swing arm is located below the high-voltage battery, the length of the swing arm can be secured and the cushioning property can be improved.

In the case of (9), by laying the high-voltage battery along the front and rear frames of the seat cover, it is possible to obtain a layout in which dead space is unlikely to occur around the high-voltage battery.

In the case of (10) above, the high-voltage battery, the drive motor, and the driver are combined in the swing arm so that the wiring loss between them can be minimized.

1 is a left side view of a motorcycle which is a first embodiment of a scooter type electric vehicle of the present invention.
Figure 2 is a plan view of an important part of Figure 1;
3 is a left side view of the motorcycle in a state in which the vehicle body cover is removed.
4 is a plan view of an important part of Fig.
5 is a front view of an important part of Fig.
6 is a circuit diagram showing a schematic configuration of the drive system of the motorcycle.
Fig. 7 is a plan view corresponding to Fig. 4, showing a vehicle body layout of the drive system. Fig.
8A is a view showing a motorcycle which is a second embodiment of a scooter type electric vehicle of the present invention, and is a left side view corresponding to Fig. 3;
8B is a plan view of the swing arm of the motorcycle.
Fig. 9 is a left side view corresponding to Fig. 3 showing a motorcycle which is a third embodiment of the scooter type electric vehicle of the present invention. Fig.
Fig. 10 is a left side view corresponding to Fig. 3 showing a motorcycle which is a fourth embodiment of the scooter type electric vehicle of the present invention. Fig.
11 is a view showing a motorcycle which is a fifth embodiment of the scooter type electric vehicle of the present invention, and is a left side view corresponding to Fig. 3;

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a scooter type electric vehicle of the present invention will be described with reference to the drawings. In the following description, directions in the front, rear, left, and right directions are the same as those in the case of a scooter type electric vehicle unless otherwise specified. In the drawing, the arrow FR indicates the vehicle front, the arrow LH indicates the vehicle left, and the arrow UP indicates the vehicle upper direction.

[First Embodiment]

A scooter type motorcycle (saddle type vehicle) 1 shown in Figs. 1 to 5 is installed between a steering bar handle 2 and a saddle seat for a passenger seat (hereinafter, simply referred to as a seat) 3 A lower floor step floor 4; And a vehicle body cover 5 covering substantially the entire body of the vehicle. Further, the one-dot chain line CL in each drawing shows the center line in the vehicle body horizontal direction.

A battery unit 6 is mounted on the rear side of the step floor 4 of the motorcycle 1. The electric power from the battery unit 6 is received by the drive motor 8 in the vicinity of the rear wheel 7 and driven by the drive force to drive the rear wheel 7 to drive the motorcycle 1 . That is, the motorcycle 1 is configured as an electric vehicle.

The vehicle body frame 11 of the motorcycle 1 is formed by joining a plurality of kinds of steel members integrally by welding or the like and has a head pipe 12 for steerably supporting the front suspension suspension system at the front end thereof And a pivot portion 13 for supporting the rear wheel suspension system up and down so as to be swingable.

The front suspension system includes left and right front forks 15 that axially support the front wheel 14 at a lower end portion thereof, a bridge member 16 that fixes between the upper ends of the left and right front forks 15, And a stem pipe 17 extending upwardly from the center in the left and right direction.

The stem pipe (17) is inserted into the head pipe (12) so as to be relatively rotatable from below. The upper end of the stem pipe 17 protrudes from the upper side of the head pipe 12, and the bar handle 2 is fixed thereto.

The rear wheel suspension system includes a swing arm 18 for axially supporting the rear wheel 7 at the rear end thereof as a main component. The swing arm 18 integrally connects all of the left and right arms. The rear end of the left arm constitutes a swing unit incorporating a driving motor 8 for driving and a gear mechanism 19 for reducing the driving force from the driving motor 8. [ The rear end portion of the swing arm 18 is elastically supported at the rear end portion of the vehicle body frame 11 through the left and right cushion unit 21. The swing arm 18 constitutes a part of the body frame 11.

The vehicle body frame 11 includes a head pipe 12 which is provided at a front end of the body frame 11 and whose upper portion is inclined rearward and a main frame pipe 22 A front cross pipe 23 to which a front side of the left and right intermediate portions is joined to a lower portion (rear end) of the main frame pipe 22 and a front side cross pipe 23 to which a front end is joined to the left and right side rear portions of the front side cross pipe 23, A rear cross pipe 25 in which the rear ends of the left and right extending frames 24 are joined to the front sides of right and left sides, A pair of right and left rear frame pipes 26 (hereinafter, simply referred to as rear frames) 26 to which all of the left and right rear frames 26 are joined, The left and right floor frame 27, It is.

The main frame pipe 22 is composed of, for example, a round steel pipe and includes a down frame portion 22a extending obliquely downward from the rear face of the head pipe 12 made of a cylindrical steel material, And a lower frame portion 22b which extends rearward from the lower end of the frame portion 22b. A gusset 22c is provided between the lower rear surface of the head pipe 12 and the upper front surface of the down frame portion 22a. The downward middle portion of the down frame portion 22a is gently bent so as to be convex toward the rear side. As a result, the lower portion of the down frame portion 22a faces forward, contributing to an expansion of foot space of the occupant .

The front and rear cross pipes 23 and 25 are made of, for example, a round steel pipe and are provided in a straight line along the vehicle width direction (left and right direction). A side stand bracket 23a, which rotatably supports the side stand 29a, is attached to the left end of the front cross pipe 23. A pair of left and right main stand brackets 25a for pivotally supporting the main stand 29b are attached to the rear portion of the rear cross pipe 25.

The left and right extension frames 24 are made of, for example, rectangular steel pipes, and are formed so as to have a linear shape along the front-rear direction and to be parallel to each other and substantially horizontal. On the upper surface of the left and right extension frames 24, a flat support plate 24a extending to the outside in the vehicle width direction is attached. The battery unit 6 is mounted on the support plate 24a.

The left and right rear frames 26 are composed of, for example, a rectangular steel pipe and include an upwardly extending portion 26a extending upwardly and substantially vertically from the rear cross pipe 25, And a rearward extending portion 26b extending rearward. A first cross pipe 26c is provided between the upper and lower intermediate portions of the left and right upward extending portions 26a and a second cross pipe 26d is provided between the curved portions of the left and right rear frames 26 . A cylindrical pivot portion 13 for supporting the front end portion of the swing arm 18 is joined to the lower rear side of the left and right upward extending portion 26a. A cushion bracket 28 for pivotally supporting the upper end of the cushion unit 21 is joined to the rear lower side of the left and right rear extension portions 26b.

The left and right floor frame 27 includes left and right floor frame pipes 27a that extend obliquely from both sides of the lower portion of the main frame pipe 22 downward to the outside downwardly and extend obliquely outwardly rearward, A left and right floor connection pipe 27b extending outwardly in the vehicle width direction from the outside of the vertically middle portion of the upwardly extending portion 26a and having its tip joined to the inside of the rear end portion of the left and right floor frame pipes 27a, And a floor cross pipe 27c extending between the front and rear intermediate portions of the front wall 27a. Each of the pipes 27a to 27c is made of, for example, a round steel pipe. The base end of the left and right floor connecting pipe 27b is joined to the outside of the upwardly extending portion 26a.

The left and right floor frame pipes 27a are formed symmetrically with respect to each other and obliquely arranged so as to rise upward as a whole. The rear portion of the left and right floor frame pipe 27a is curved in a crank shape from the side so as to be displaced upward relative to the front portion thereof. A straight cross-sectional floor pipe 27c along the left-right direction is disposed immediately in front of the curved bent portion. The right and left intermediate portions of the floor cross pipe 27c are supported on the upper surfaces of the left and right extending frames 24 through the left and right floor supporting brackets 27d. The rear end portions (left and right floor connecting pipes 27b) of the left and right floor frames 27 are positioned lower than the first cross pipe 26c and above the pivot portion 13 as viewed from the side.

On the rear side of the head pipe 12, a seat 3 is disposed through a gap M. The seat 3 has, for example, a seating surface for the driver and a rear passenger as an integral unit, and extends to the vicinity of the rear end of the vehicle body. The sheet 3 also functions as a lead for opening and closing the upper opening of the article storage box 39 located below the sheet 3. [ Reference numeral 3a in the figure denotes a pivot shaft for rotatably connecting the lower end of the front end portion of the seat 3 to the front end portion of the article storage box 39. [

The vehicle body cover 5 includes a front cover 31 covering the periphery of the head pipe 12 and the down frame portion 22a from the front; A front inner cover 32 covering the periphery of the head pipe 12 and the down frame portion 22a from behind; An under cover 33 covering the peripheries of the lower frame portion 22b and the left and right floor frames 27 from below to the left and right outside; A step floor cover (34) covering the peripheries of the lower frame portion (22b) and the left and right floor frames (27) from above to form the step floor (4); A rear center cover 35 which is erected from the rear portion of the step floor cover 34 toward the front lower end of the seat 3 and covers the battery unit 6 and the article storage box 39 thereabove from the front; Left and right rear side covers 36 that are inclined rearward from the left and right sides of the rear center cover 35 and extend continuously so as to cover the upper portions of the left and right rear frames 26 from below on both sides of the rear portion of the seat 3 I have. These covers 31 to 36 are made of synthetic resin.

The step floor cover 34 includes a step floor 4 (front pedestrian for driver) located between the front inner cover 32 and the rear center cover 35; And a rear step board 37 extending rearward from both sides of the rear end so as to extend to the outside of the battery unit 6. [ The step floor 4 is supported by all of the left and right floor frames 27 and the lower frame portion 22b of the main frame pipe 22. The rear step board 37 is supported by the rear portion of the left and right floor frames 27. [

As shown in Figs. 3, 4 and 7, the battery unit 6 constitutes a high-voltage battery 6A of 48V by connecting four 12V lead batteries 6a in series along the vehicle width direction, And the high-voltage battery 6A is housed in a single battery case 9. [

As shown in Fig. 7, each lead battery 6a has a rectangular parallelepiped shape when seen in a plan view, and has a positive electrode terminal 41a and a negative electrode terminal 41b at both end positions of the rectangle- I have. Each lead battery 6a is arranged along the vehicle width direction by directing these positive and negative electrode terminals 41a and 41b upward and rearward, and also by contacting the long sides of the rectangular shape. Each lead battery 6a is disposed such that the positions of the positive and negative terminals 41a and 41b of the lead batteries 6a are different between the adjacent lead batteries 6a.

Here, a pair of lead batteries 6a located inside the left and right direction of the high-voltage battery 6A are arranged in such a manner that the long sides where the terminals 41a and 41b are located are adjacent to each other when viewed in a plan view, And the positive electrode terminal 41a and the negative electrode terminal 41b located in front of these long sides are connected to each other through the intermediate cable 42. [ The intermediate cable 42 has a circuit breaker 43. The circuit breaker 43 is disposed so as to be exposed at left and right intermediate positions on the upper front side of a battery case 9 having a rectangular parallelepiped shape (see FIG. 5) . By interrupting operation of the circuit breaker 43, it is possible to interrupt the connection at the intermediate portion of the high-voltage battery 6A. Further, the intermediate cable 42 may have a connector replacing the circuit breaker 43, and a structure (not shown) capable of interrupting the connection at the intermediate portion of the high-voltage battery 6A by detachment of the connector .

The battery case 9 is composed of a case body 9a that opens upward and a case cover 9b that closes an upper opening of the case body 9. The battery case 9 is not limited to this box shape, And a battery connecting means that can be connected as a unit. It is to be noted that the case body 9a and the case cover 9b may be configured as described above so that the lead battery 6a can be easily detached and not soiled, It is also possible to use it as a part.

On the left and right sides of the upper front side of the battery case 9, external connectors 44 for external wiring corresponding to the anode side and the cathode side of the high-voltage battery 6A are arranged (see Figs. 5 and 7).

That is, the output cable 46 is connected to the positive electrode terminal 41a and the negative electrode terminal 41b located in front of the outermost lead batteries 6a, respectively. The output cables 46 are led out from the left and right sides of the upper front side of the battery case 9 to the outside of the battery case 9 and the external connectors 44 provided at the front ends of the output cables 46, And are disposed on both left and right sides of the upper front side.

As shown in Fig. 7, when a pair of lead batteries 6a located on the left and right outside of the high-voltage battery 6A are viewed in a plan view, the long sides of the lead batteries 6a opposite to the long sides where the terminals 41a, And the positive electrode terminals 41a and the negative electrode terminals 41b located on the rear side of the lead batteries 6a are connected to each other via the left and right connecting cables 45. [ A connecting connector 45a is provided at the middle portion of each connecting cable 45. [

3, 4, and 5, the battery unit 6 is mounted on the support plate 24a (refer to FIG. 3) by a battery holding frame 61 having an L- (On the right and left extension frames 24). The battery unit 6 is positioned immediately before the left and right rear frames 26. [ The battery unit 6 is held so as to be surrounded by left and right extended frames 24, left and right rear frames 26 and battery holding frames 61 in the front, Further, on the left and right outer sides of the battery unit 6, the rear portions of the left and right floor frames 27 inclined upward from the side are arranged.

The battery holding frame 61 is mainly composed of, for example, a round steel pipe, and the lower front side and the rear upper side thereof are fastened and fixed to the floor cross pipe 27c and the first cross pipe 26c, respectively.

The battery retention frame 61 includes a front fastening bracket 61a fastened and fixed in the middle in the right and left direction of the floor cross pipe 27c; A pair of left and right front side frame pipes 61b extending upward from the front side fastening bracket 61a; An upper cross pipe 61c connecting the upper ends of the front side frame pipes 61b and extending to the outside in the vehicle width direction; A pair of left and right upper frame pipes 61d extending rearward from left and right ends of the upper cross pipe 61c; An upper retention plate 61e which connects between the rear ends of the upper frame pipes 61d and extends to the outside in the vehicle width direction; And a rear side fastening bracket 61f which connects between the rear end portions of the upper side frame pipes 61d and is fastened to the right and left intermediate portions of the first cross pipe 26c. The upper and lower holding plates 61e are formed in a flat plate shape along the upper surface of the battery unit 6 and the front and rear edge portions thereof are bent along the respective front and rear portions of the upper surface of the battery unit 6.

A pair of left and right front box supporting brackets 39a for fastening and supporting the front side of the bottom of the article storage box 39 disposed on the battery unit 6 are fixed and fixed on the upper side of the front end of the pair of left and right upper frame pipes 61d . On the upper side of the second cross pipe 26d, a pair of right and left rear box supporting brackets 39b for fastening and supporting the rear side of the bottom of the article storage box 39 are fixed.

6, a DC current of 48 V from the high-voltage battery 6A is converted into a three-phase alternating current through the PDU 47 (motor driver) in the control unit 47A, Is supplied to the drive motor (8). The DC current of 48 V is reduced to 12 V through a DC-DC converter (simply referred to as a converter hereinafter) 48 and then supplied to the ECU 49 and the general electric component 51 in the control unit 47A . 6 designates a charger installed integrally with the motorcycle 1 or separately.

A conductor 52 is provided between the high-voltage battery 6A and the cathode side of the PDU 47 and the converter 48. [

The conductor 52 is provided with a relay circuit. The output cable 46 extending from the negative electrode side of the high voltage battery 6A is connected to one terminal of the switch 52a of the relay circuit and the PDU 47 and the converter 47 are connected to the other terminal of the switch 52a. And the second output cable 46a and the third output cable 46b reaching the cathode side of the first output cable 48 are respectively connected. The anode side of the lead battery 6a which is one of the high-voltage batteries 6A is connected to one terminal of the coil 52b of the relay circuit via the main switch 53, And the other terminal is grounded. When the main switch 53 is turned on and current flows from the one lead battery 6a to the coil 52b, the switch 52a of the relay circuit is closed so that the current from the high voltage battery 6A flows to the PDU 47 and the converter 48, respectively. An output cable extending from the anode side of the high-voltage battery 6A is also indicated by reference numeral 46. [

Referring to Fig. 7 together, the control unit 47A is supported between the upper portions of the left and right rear frames 26. Fig. At the rear of the control unit 47A, a converter 48, which is similarly supported between the upper portions of the left and right rear frames 26, is disposed. The conductor 52 is disposed adjacent to the circuit breaker 43 immediately before the battery unit 6, for example. Reference numerals 53a in Figs. 6 and 7 denote main switch harnesses for connecting the main switch 53, positive cathodes of the one lead battery 6a, and also the conductors 52. Fig. Reference numeral 48a denotes a unit connecting cable for connecting between the control unit 47A and the converter 48. [ Reference numeral 8a denotes a motor cable extending from the control unit 47A (PDU 47) to the drive motor 8. [ The second and third output cables branched from the output cables 46 on the positive and negative sides of the high voltage battery 6A and reaching the control unit 47A (PDU 47) and the converter 48, respectively, , And 46b.

An output cable 46 extending from the anode and the cathode of the high voltage battery 6A is gathered on one side in the width direction of the vehicle body and arranged to the rear PDU 47 and the converter 48.

3 and 4, the left and right extension frames 24 of the vehicle body frame 11 extend in the front-rear direction at a position rearward of the front end of the seat 3, The supported battery unit 6 is disposed only below the seat 3 and behind the front end thereof. Since the battery unit 6 has a predetermined height, the upper surface of the battery unit 6 is located above the step floor 4 and the rear step board 37.

The front-rear direction dimension of the battery unit 6 is set so as to fall within the front-back direction dimension of the article storage box 39 located below the front half of the seat 3. [ The left and right widths of the battery unit 6 are larger than the left and right widths of the seat 3 but also fall within the left and right outer widths of the left and right floor frames 27 and into the right and left outer widths of the left and right rear foot plates, And the curved outer surface of the rear side cover (36).

As described above, the motorcycle 1 (scooter type electric vehicle) of the present embodiment includes the down frame portion 22a extending downwardly rearward from the head pipe 12 and the down frame portion 22a extending from the lower end of the down frame portion 22a A body frame 11 having a lower frame portion 22b extending rearward; A seat (3) on the rear side of the head pipe (12) on which an occupant sits; A step floor (4) installed between the head pipe (12) and the seat (3) and on which a passenger puts his foot; And a lead battery 6a for supplying power to the drive motor 8 for driving. The vehicle body frame 11 has an extension frame 24 extending rearward beyond the front end of the seat 3; The lead batteries 6a are arranged in plural in the vehicle width direction to constitute the high voltage battery 6A; The high-voltage battery 6A is supported on the elongated frame 24 and the high-voltage battery 6A is disposed only below the seat 3 and behind the front end of the seat 3; The step floor 4 is provided at a position lower than the upper surface of the high-voltage battery 6A.

According to this configuration, since the high-voltage battery 6A is disposed under the seat 3 and only behind the front end of the seat 3, the step floor 4 can be made low and wide. By arranging the high-voltage battery 6A composed of a plurality of lead batteries 6a, which are heavy, concentratedly in the vicinity of the center of the vehicle body, the influence on the layout of other components can be reduced, . Further, the high-voltage battery 6A composed of a plurality of lead batteries 6a can secure high-voltage driving power.

The motorcycle 1 according to the present embodiment includes a plurality of lead batteries 6a housed in a battery case 9 and disposed above the battery case 9 and below the seat 3, (39). According to this configuration, the high-voltage battery 6A composed of a plurality of lead batteries 6a can be integrally joined, and the installation property and the maintenance property can be improved. Further, a space above the battery case 9 can be used as an article storage space.

In the motorcycle 1 of the present embodiment, the high-voltage battery 6A is disposed within the front-rear direction dimension of the article storage box 39. [ According to this configuration, since the article storage box 39 can be provided using the space between the high-voltage battery 6A and the seat 3, the article storage capacity can be secured.

Further, in the motorcycle 1 of the present embodiment, the high-voltage battery 6A extends to the outside in the vehicle width direction of the seat 3 as viewed in plan view; A rear step board 37 for placing a foot of a rear passenger is installed continuously from the step floor 4 on the outside of the high voltage battery 6A in the vehicle width direction; The vehicle body frame 11 has a floor frame 27 extending to the outside in the vehicle width direction of the high-voltage battery 6A and supporting the rear step board 37; Configuration. According to this configuration, since the outer frame of the high-voltage battery 6A can be covered with the floor frame 27, the influence of the external force received from the outer chamber of the high-voltage battery 6A can be reduced.

In addition, in the motorcycle 1 of the present embodiment, the elongated frame 24 passes under the high-voltage battery 6A and extends to the rear side; The vehicle body frame 11 has a pair of left and right rear frames 26 which are erected upward from the rear end of the extension frame 24 at the rear of the high voltage battery 6A; The swing arm 18 constituting a part of the vehicle body frame 11 rotatably supports the rear wheel 7 at the rear end portion and receives the drive motor 8 therein; The front end of the swing arm 18 is pivotably supported on the rear frame 26 at the rear of the high-voltage battery 6A; Configuration.

According to this configuration, since the elongated frame 24 passes under the high-voltage battery 6A, an external force due to the ground hit can be prevented from reaching the high-voltage battery 6A. By providing the swing support portion of the swing arm 18 at a position not overlapping with the high-voltage battery 6A from the side view, the swing arm of the swing arm 18 can be pierced right and left without the high-voltage battery 6A, It is possible to increase the rigidity around the portion 13 and secure the fitting property of the swing arm 18. [

In the motorcycle 1 of the present embodiment, the vehicle body frame 11 extends upwardly from the extension frame 24 in front of the high-voltage battery 6A, extends rearwardly from above the high-voltage battery 6A, A battery retaining frame (61) for retaining the battery; The battery holding frame 61 covers the front and top surfaces of the high-voltage battery 6A and supports the article storage box 39 provided on the high-voltage battery 6A; Configuration.

According to this configuration, not only the lower surface and the rear surface of the high-voltage battery 6A but also the front surface and the upper surface can be surrounded by the frame member. Further, since the battery holding frame 61 also serves as a support stay for the article storage box 39, the number of parts can be reduced.

Further, in the motorcycle 1 of the present embodiment, the lead batteries 6a are arranged four in the vehicle width direction and are connected in series to constitute the high-voltage battery 6A; Each lead battery 6a is disposed in the front and rear direction of the positive and negative terminals 41a and 41b and extends in the front and rear direction of the positive and negative terminals 41a and 41b Position to reverse the position; The external connector 44 of the output cable 46 extending from the positive terminal 41a and the negative terminal 41b of the lead battery 6a outside the vehicle width direction is connected to a battery The circuit breaker 43 of the intermediate cable 42 that is connected to the inside of the battery case 6 in the vehicle width direction of the lead battery 6a is exposed to the outside of the battery case 9 from one side of the case 9, (9) from the one side of the battery case (9); Configuration.

The external connector 44 of the output cable 46 extending from the positive electrode terminal 41a and negative electrode terminal 41b of the lead battery 6a on the outside in the vehicle width direction is connected to one side of the battery case 9 And the circuit breaker 43 of the intermediate cable 42 connecting between the pair of lead batteries 6a on the inner side in the vehicle width direction is disposed on the same side as the respective external connectors 44. [ As a result, when disconnecting the high-voltage battery 6A, it is possible to cut off the circuit breaker 43 to halve the voltage, and then to remove the external connectors 44 on both sides from the same direction, Can be improved.

[Second Embodiment]

Next, a second embodiment of the scooter type electric vehicle of the present invention will be described with reference to Figs. 8A and 8B.

The motorcycle 101 of the present embodiment has the structure of the first embodiment in which the pivot portion 13 is provided on the lower edge side of the left and right extension frames 24, The system is supported in a vertically movable manner. The same components as those in the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted.

The swing arm 118 constituting a part of the rear suspension system of this embodiment does not constitute a swing unit as in the first embodiment but employs a well-known structure having left and right arms, a pivot pipe and a cross member have. In the motorcycle 101 of the present embodiment, a drive motor 108 as an in-wheel motor is disposed on the inner peripheral side of the rear wheel 7. This makes it easy to ensure clearance between the swing arm 118 and the extension frame 24 when the swing arm 118 swings. Further, even if the left and right extension frames 24 are inclined slightly upward, the clearance can be easily ensured.

The left and right extended frames 24 of the present embodiment are integrally continuous with the upwardly extending portions 26a of the left and right rear frames 26 with their rear ends bent upward. That is, the left and right extended frames 24 and the left and right rear frames 26 are formed by integral rectangular steel pipes.

The battery unit 6 is mounted on the left and right extension frames 24. The battery unit 6 is disposed only below the seat 3 and behind the front end of the seat 3 and at a position lower than the top surface of the battery unit 6 as in the first embodiment, 4) are installed.

As described above, in the motorcycle 101 of the present embodiment, as in the motorcycle 1 of the first embodiment, only the lower portion of the seat 3 and also behind the front end of the seat 3, The step floor 4 can be made lower and wider so that the influence on the layout of the other components can be reduced and the mass concentration at the center of the vehicle body can be achieved and the high- .

The motorcycle 101 has a structure in which the vehicle body frame 11 rotatably supports the rear wheel 7 at the rear end portion and the front end portion is capable of swinging from the lower side of the high voltage battery 6A to the extending frame 24 And a swing arm 118 supported by the swing arm 118. As a result, the swinging arm 118 of the swing arm 118 is positioned below the high-voltage battery 6A, thereby securing the length of the swing arm 118 and improving the cushioning performance.

[Third embodiment]

Next, a third embodiment of the scooter type electric vehicle of the present invention will be described with reference to Fig.

The motorcycle 201 of the present embodiment has an upwardly extending portion 26a that is inclined so that the left and right rear frames 26 are located rearward as the upper side thereof; And the battery unit 6 is disposed obliquely so as to follow the upper left and right extensions; The same reference numerals are given to the same parts as those in the first embodiment, and the description thereof is omitted.

That is, the battery unit 6 of the present embodiment is arranged in an inclined posture in which the front end portion thereof is lifted upward. In other words, the battery unit 6 is inclined to follow the front surface of the rear center cover 35 covering the front side thereof. 9, a swing arm 18 is used as the swing unit. In place of the swing arm 18, a combination of a known swing arm 118 and an in-wheel type drive motor 8 .

As described above, in the motorcycle 201 of the present embodiment, as in the motorcycle 1 of the first embodiment, only the lower portion of the seat 3 and also behind the front end of the seat 3, 6A), the step floor 4 can be made lower and wider, the influence on the layout of other parts can be reduced, the mass concentration can be achieved at the center of the vehicle body, .

The motorcycle 201 further includes a rear center cover 35 covering a periphery below the seat 3; The extension frame 24 passes under the high voltage battery 6A and extends to the rear side; The vehicle body frame 11 has a rear frame 26 that is inclined rearward upward from the rear end of the extension frame 24 at the rear of the high voltage battery 6A as seen from the side; The front surface of the rear center cover 35 is installed so as to be inclined upward from the rear side as viewed from the side; The high-voltage battery 6A is disposed obliquely along the front surface of the rear center cover 35 and the rear frame 26 as viewed from the side; Configuration.

According to this configuration, by laying the high-voltage battery 6A along the front surface of the rear center cover 35 and the rear frame 26, it is possible to obtain a layout in which dead space is unlikely to occur around the high-voltage battery 6A.

[Fourth Embodiment]

Next, a fourth embodiment of the scooter type electric vehicle of the present invention will be described with reference to Fig.

The motorcycle 301 of the present embodiment has the structure of the first embodiment in which the extension frame 24 extending rearward beyond the front end of the seat 3 in the body frame 11 is connected to the swing arm 218 And the same components as those of the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted.

That is, the battery unit 6 of the present embodiment is mounted on the front portions of the left and right arms of the swing arm 218 (on the left and right extending frames 24) and swung up and down together with the swing arm 218.

The swing arm 218 has the same configuration as the swing arm 108 of the second embodiment except for, for example, the rear portion of the left arm. The rear portion of the left arm includes a drive motor 8 and a gear mechanism 19 for driving at the rear end thereof as in the left arm of the swing arm 18 as the swing unit of the first embodiment, For example, the PDU 47 and the converter 48 are built in the rear upper portion. Instead of this structure, a combination of a well-known swing arm 118 and an in-wheel type drive motor 108 may be employed as in the second embodiment. Reference numeral 113 in the figure denotes a pivot plate for pivotally supporting the front end portion of the swing arm 218. [

As described above, in the motorcycle 301 of the present embodiment, as in the motorcycle 1 of the first embodiment, only the rear portion of the seat 3 and behind the front end of the seat 3, 6A, the step floor 4 can be made low and wide, the influence on the layout of the other components can be reduced, the mass concentration at the center of the vehicle body can be achieved, and the high- .

In the motorcycle 301, the extension frame 24 includes a swing arm (not shown) which rotatably supports the rear wheel 7 at a rear end portion thereof, and a front end portion thereof is swingably supported by the lower frame portion 22b. (218); Between the left and right arms of the swing arm 218 and on these left and right arms at least a part of the high-voltage battery 6A is arranged; The drive motor 8 and its driver (PDU 47) are disposed within the swing arm 218; Configuration.

According to this configuration, by arranging the high-voltage battery 6A, the drive motor 8, and the PDU 47 together on the swing arm 218, the wiring loss therebetween can be minimized.

[Fifth Embodiment]

Next, a fifth embodiment of the scooter type electric vehicle of the present invention will be described with reference to Fig.

The motorcycle 401 of the present embodiment is arranged such that the arrangement direction of the lead batteries 6a of the battery unit 6 is the forward and backward direction with respect to the configuration of the first embodiment; The battery unit 6 is disposed on an extension frame 24 which is a front portion of the swing arm 218; Points are especially different. Hereinafter, the same constituent elements as those of the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted.

That is, the left and right rear frames 26 are disposed so that the left and right widths of the battery unit 6 according to the present embodiment are suppressed and pass through the outer room of the battery unit 6. The left and right rear frames 26 are extended to be convex downward from the rear side of the left and right side portions of the front cross pipe 23, and then bent and extended to be displaced upward. That is, the swing arm 218 is the same as that of the fourth embodiment, and instead of the combination of the known swing arm 118 and the in-wheel type drive motor 108 as in the second embodiment do.

As described above, in the motorcycle 401 of the present embodiment, as in the motorcycle 1 of the first embodiment, only the rear portion of the seat 3 and behind the front end of the seat 3 are covered with the high- 6A, the step floor 4 can be made low and wide, the influence on the layout of the other components can be reduced, the mass concentration at the center of the vehicle body can be achieved, and the high- .

Further, the extended frame 24 is constituted by the swing arm 218; The high voltage battery 6A is disposed between the left and right arms of the swing arm 218 and also on the left and right arms thereof and the drive motor 8 and the PDU 47 are disposed in the swing arm 218, The drive motor 8, and the PDU 47 can be minimized.

The present invention is not limited to the above-described embodiments. For example, the present invention is not limited to a motorcycle, but may be applied to a three-wheeled or four-wheeled vehicle. Needless to say, various changes are possible.

≪ Industrial Availability >

According to the scooter type electric vehicle of the present invention, the high-voltage battery can be disposed rearwardly of the front end of the seat by disposing the high-voltage battery in the longitudinal direction along the width direction of the vehicle body below the seat. Thus, the step floor can be made low and wide. Further, by arranging the high-voltage battery including a plurality of driving lead acid batteries, which are heavy, in the vicinity of the center of the vehicle body, it is possible to reduce influence on the layout of other components and to concentrate the mass have. In addition, by employing a high-voltage battery including a plurality of lead acid batteries for driving, high-voltage driving power can be ensured.

1, 101, 201, 301, 401: Motorcycle (scooter type electric vehicle)
3: Sheet 4: Step floor
6a: lead battery (drive lead accumulator) 6A: high voltage battery
7: rear wheel 8, 108: drive motor
9: battery case (battery case) 11: body frame
12: head pipe 18, 118, 218: swing arm
22a: down frame part 22b: lower frame part
24: Extension frame 26: Rear frame
27: Floor frame (step frame) 35: Rear center cover (seat cover)
37: rear step board (passenger step) 39: article storage box
41a: positive electrode terminal 41b: negative electrode terminal
42: Intermediate cable (cable) 43: Circuit breaker (middle connector)
44: External connector 46: Output cable (cable)
47: PDU (driver)
61: Battery supporting frame (sub frame)

Claims (10)

A vehicle body frame having a down frame portion extending from a head pipe toward a lower rear side along a vehicle longitudinal direction and a lower frame portion extending from a lower end of the down frame portion toward a rear side in the vehicle longitudinal direction;
A seat provided on the rear side of the head pipe in the front-rear direction of the vehicle to seat the occupant;
A step floor installed between the head pipe and the seat to allow the occupant to put his foot;
A driving motor for driving;
And a driving lead battery for supplying electric power to the driving motor,
The body frame has an elongated frame extending toward the rear of the vehicle in the longitudinal direction of the vehicle ahead of the front end of the seat;
The driving lead acid accumulators are arranged along the vehicle width direction to constitute a high-voltage battery;
The high-voltage battery is disposed only at the lower portion of the seat and behind the front end of the seat in the vehicle longitudinal direction, in addition to being supported by the extended frame;
The step floor is provided at a position lower than the upper surface of the high-voltage battery,
Wherein the high-voltage battery extends to the outside of the seat along the vehicle width direction when viewed in plan view;
A passenger step for setting a foot of a rear passenger is provided continuously from the step floor on the outside of the high-voltage battery along the vehicle longitudinal direction;
Wherein the vehicle body frame has a step frame extending to the outside of the high-voltage battery along the vehicle width direction and supporting the passenger step. A vehicle body frame having a down frame portion extending from a head pipe toward a lower rear side along a vehicle longitudinal direction and a lower frame portion extending from a lower end of the down frame portion toward a rear side in the vehicle longitudinal direction;
A seat provided on the rear side of the head pipe in the front-rear direction of the vehicle to seat the occupant;
A step floor installed between the head pipe and the seat to allow the occupant to put his foot;
A driving motor for driving;
And a driving lead battery for supplying electric power to the driving motor,
The body frame has an elongated frame extending toward the rear of the vehicle in the longitudinal direction of the vehicle ahead of the front end of the seat;
The driving lead acid accumulators are arranged along the vehicle width direction to constitute a high-voltage battery;
The high-voltage battery is disposed only at the lower portion of the seat and behind the front end of the seat in the vehicle longitudinal direction, in addition to being supported by the extended frame;
The step floor is provided at a position lower than the upper surface of the high-voltage battery,
Wherein each of the driving lead acid batteries is arranged in four lines along the vehicle width direction and is connected in series with each other;
Wherein each of the driving lead acid batteries has a structure in which the positive terminal and the negative terminal thereof are adjacent to each other along the vehicle longitudinal direction and in the vehicle width direction to reverse the positions of the positive electrode terminal and the negative electrode terminal in the vehicle longitudinal direction ;
And the external connector of the first cable extending from the positive terminal and the negative terminal of the driving lead acid batteries outside the vehicle width direction is connected to the battery case The intermediate connector of the second cable for connecting the inside of the driving lead acid batteries in the vehicle width direction is exposed to the outside from the one side of the battery case Wherein the electric motor is a motor. A vehicle body frame having a down frame portion extending from a head pipe toward a lower rear side along a vehicle longitudinal direction and a lower frame portion extending from a lower end of the down frame portion toward a rear side in the vehicle longitudinal direction;
A seat provided on the rear side of the head pipe in the front-rear direction of the vehicle to seat the occupant;
A step floor installed between the head pipe and the seat to allow the occupant to put his foot;
A driving motor for driving;
And a driving lead battery for supplying electric power to the driving motor,
The body frame has an elongated frame extending toward the rear of the vehicle in the longitudinal direction of the vehicle ahead of the front end of the seat;
The driving lead acid accumulators are arranged along the vehicle width direction to constitute a high-voltage battery;
The high-voltage battery is disposed only at the lower portion of the seat and behind the front end of the seat in the vehicle longitudinal direction, in addition to being supported by the extended frame;
The step floor is provided at a position lower than the upper surface of the high-voltage battery,
Wherein the extension frame comprises a swing arm having a rear end pivotally supporting a rear wheel at an end thereof and having a front end thereof pivotally supported by the lower frame portion;
At least a portion of the high-voltage battery is disposed on the left arm and the right arm between the left arm and the right arm of the swing arm;
Further, the motor and the driver thereof are disposed in the swing arm. The method according to any one of claims 1 to 3,
A battery case for accommodating the high-voltage battery;
Further comprising an article storage box provided above the battery case and below the seat. The method of claim 4,
Wherein the high-voltage battery is disposed within the front-rear direction along the vehicle longitudinal direction of the article storage box. The method according to any one of claims 1 to 3,
The extension frame extends under the high-voltage battery to the rear along the vehicle longitudinal direction;
The vehicle body frame has a pair of left and right rear frames that are erected upward from a rear end of the elongated frame at a rear side along the vehicle longitudinal direction of the high-voltage battery;
Wherein the swing arm constituting a part of the vehicle body frame rotatably supports the rear wheel at the rear end thereof and accommodates the driving motor therein and the front end portion of the swing arm extends forward and rearward of the high- Wherein the rear frame is pivotally supported by the rear frame at a rear position along a direction of the vehicle. The method according to any one of claims 1 to 3,
The vehicle body frame has a subframe extending upward from the extension frame in front of the high-voltage battery along the vehicle longitudinal direction and extending rearward of the high-voltage battery in the vehicle longitudinal direction;
Wherein the subframe covers the front surface and the upper surface of the high-voltage battery, and supports the article storage box provided on the high-voltage battery. The method according to any one of claims 1 to 3,
Wherein the vehicle body frame has a swing arm in which a rear wheel is rotatably supported at a rear end portion thereof and a front end portion is swingably supported by the extension frame below the high-voltage battery. The method according to any one of claims 1 to 3,
Further comprising: a seat cover that covers a lower periphery of the seat;
Wherein the elongate frame extends under the high-voltage battery and extends to the rear along the vehicle longitudinal direction;
Wherein the vehicle body frame has a rear frame which is inclined from a rear end of the extension frame in a rear direction along the vehicle longitudinal direction of the high-voltage battery toward a rear upper side along the vehicle longitudinal direction as viewed from a side;
The front surface of the seat cover is installed so as to be inclined upward toward the rear side along the vehicle longitudinal direction as viewed from the side;
Characterized in that the high-voltage battery is disposed so as to be inclined so as to follow the front face of the seat cover and the rear frame as viewed from the side. delete

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