JPH05105149A - Battery protecting structure for motorcycle driven by electric motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a battery protection structure for an electric two-wheeled vehicle that secures a space for disposing a large-capacity battery and can more reliably protect the battery from external force or the like even in the event of rolling. [Structure] A portion between a pair of left and right side frames 5 and 5 between a head pipe 3 and a seat 18 is bent downward, and the downward bent portions 5a of the left and right side frames 5 and 5 are moved forward. , A pair of rear cross members 6 and 7 are connected to form a low floor foot rest A, and batteries 31 and 32 are mounted below the foot rest A. Surrounded by the rear cross members 6, 7 and the left and right downward bent portions 5a, 5a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery protection structure for an electric two-wheeled vehicle, and more particularly to an improvement in the structure of a vehicle body frame capable of more reliably protecting a large-capacity battery from external force.

[0002]

2. Description of the Related Art In an electric motorcycle, a battery mounted on a vehicle supplies electric power required for a drive motor. Therefore, this battery is relatively large in order to secure a sufficient capacity and requires a considerable installation space. Therefore, in the electric motorcycle, securing a space for disposing the battery becomes a problem.
In the case of a scooter-type electric two-wheeled vehicle having a low floor foot rest, it is conceivable to use the space below the foot rest plate of the foot rest to install the battery.

[0003]

By the way, in the above-mentioned electric two-wheeled vehicle having a low floor foot mounting portion, when the battery is mounted in the space below the foot mounting plate, the arrangement position of the battery is low. It is considered that external force from the road surface or the like is likely to act on the battery. Therefore, when this type of battery arrangement structure is adopted, it is necessary to adopt a structure that can reliably protect the battery even in the event of a fall.

The present invention has been made in view of the above-mentioned conventional circumstances, and secures a space for disposing a large-capacity battery and can more reliably protect the battery from external force or the like even in the event of rolling. An object of the present invention is to provide a battery protection structure for an electric motorcycle.

[0005]

According to the present invention, a portion between a head pipe and a seat of a pair of left and right side frames is bent downward, and the downward bending portions of the left and right side frames are connected to each other. A pair of front and rear cross members connect to each other to form a low-floor foot rest, and a battery is mounted below the foot rest. Around the battery, the front and rear cross members are connected to the left and right cross members. It is a battery protection structure for an electric two-wheeled vehicle characterized by being surrounded by a downward bent portion.

[0006]

According to the battery protection structure of the present invention, since the battery is mounted below the footrest portion, which has a relatively large space, a sufficient battery capacity can be secured. Also in this case,
Since the foot rest is composed of the downward bending portions of the left and right side frames and the front and rear cross members that connect the left and right bending portions to each other, the left and right downward bending portions are provided around the battery. Since the front and rear cross members can be surrounded by the front and rear cross members, and the body frame functions as a battery protection member even in the event of a fall, the battery can be reliably protected from external force or the like.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views for explaining a battery protection structure for an electric motorcycle according to an embodiment of the present invention. FIGS. 1 and 2 are side views and plan views, and FIGS. 3 and 4 are III in FIG. -II
5 is a perspective view of the battery box, and FIG. 7 is a wiring diagram of each battery.

In the figure, reference numeral 1 is an electric motorcycle in which the structure of this embodiment is adopted, and a body frame 2 of the electric motorcycle is of a so-called underbone type and has the following structure. An upper end of a main frame 4 extending downward is fixed to the head pipe 3, and a front end of a pair of left and right side frames 5 and 5 is connected to a lower end of the main frame 4. Both side frames 5
The front portion is bent downward in a generally U-shape in a side view to form a bent portion 5a, and the rear portion is extended upward to the rear to form a seat rail portion 5b. And the bent portion 5
The front corner portions of a and the rear corner portions of a are connected by a front cross pipe 6 and a rear cross pipe 7, respectively.

A steering shaft 9a of a front fork 9 which pivotally supports a front wheel 8 is rotatably supported right and left by a head pipe 3 of the vehicle body frame 2 and is steered to an upper end of the steering shaft 9a. The handle 10 is fixed. The motor unit 11 is pivotally supported by the rear cross pipe 7 of the footrest 5a of the vehicle body frame 2 so as to be vertically swingable. This motor unit 11 is one in which an electric motor 11a and a transmission case portion 11b containing a transmission mechanism are integrated. The rear wheel 12 is supported by the rear end of the transmission case portion 11b, and a cushion unit 13 is provided between the rear end and the rear end of the seat rail portion 5b.

The front fork 9 portion is bent by the front cover 14a and the leg shield 14b.
A part is surrounded by a footboard 15a and an under cover 15b, and a peripheral part of the seat rail portion 5b is surrounded by a side cover 16. Above foot board 1
5a is a rear edge 14c of the leg shield 14a, a front edge 16a of the side cover 16, and the under cover 15b.
The upper edge 15c is arranged so as to cover the opening formed from the upper side. As a result, the footrest A having a low floor is formed.

A charging port 16c is formed in the side cover 16 between the seat rail portions 5b.
The charging port 16c can be opened and closed rearward by an opening / closing lid 16b. The charging terminal 23 is disposed inside the charging port 16c so as to face the outside. The charging terminal 23 is fixed on a bracket 23a installed between the seat rail portions 5b.

A seat bracket 17 is fixed to the front end portions of the seat rail portions 5b of the left and right side frames 5. The bracket 17 is the side cover 1
6 projects upward, and the seat 18 is mounted on the projecting end. The opening / closing lid 16b can be opened / closed without interfering with the bottom of the seat 18.

A control case 19 made of sheet metal is disposed between the seat rail portions 5b and 5b, and a support bracket 19a of the control case 19 is disposed on the seat rail portion 5.
It is hooked on b and welded. The control case 19 has a generally U-shape that opens upward, and a support plate 19b extending outward in the left and right directions is fixed to the bottom surface of the control case 19. In addition, 19c is a lightening hole. Left and right battery boxes 20 are mounted on the support plate 19b. Each battery box 20 has a box shape that opens to the left and right, and a boss portion 20a formed on the upper surface of each battery box 20 is bolted and fixed to a support bracket 19a of the control case 19.

A control unit 21 is housed and mounted in the control case 19. Further, in the left and right battery boxes 20, left and right batteries 27, 28 have positive and negative terminals 27a, 27b, 28a,
28b is housed and mounted with the vehicle 28b facing outward in the vehicle width direction (see FIG. 7). The left and right batteries 27, 28 are fixed by pressing bands 24 whose both ends are locked to the locking pieces 20c of the battery box 20.

Further, a front battery box 33 is arranged in a portion surrounded by the bent portions 5a, 5a of the left and right side frames 5 and the front and rear cross pipes 6, 7, and the upper portion thereof is located above it. The foot board 15a surrounds the left, right and lower sides with an under cover 15b. The front battery box 33 has a box shape with an open top, and brackets 33a and 33b formed on the outer surfaces of the front and rear walls of the front battery box 33 are fixed to the front and rear cross pipes 6 and 7 by bolts. Further, a partition 33c is integrally provided upright in the center of the bottom wall, and a cushioning rubber ring 26 is fitted on the partition 33c. Positioning pieces 33f are formed on the front side of the left wall and the rear side of the right wall, respectively, and a wiring notch 33d is formed at the center.
Note that 33e is a hooking piece for hooking the rubber band for fixing the battery. Further, a is a heat insulating foam material filled between the batteries and in the gaps between the batteries and the battery box.

In the front battery box 33, the front,
The rear pair of batteries 31 and 32 are housed and arranged so that their terminals are located on the same side. The front and rear batteries 31, 32 are deviated from each other in the vehicle width direction by the positioning piece 33f, so that the positive terminal 31a, the negative terminal 32b, and the negative terminal 31b, the positive terminal 3 of each battery.
2a are located at positions displaced in the vehicle width direction so that they do not face each other (see FIG. 7).

Here, the front side batteries 31, 32 and the rear side batteries 27, 28 are connected as shown in FIG. That is, the positive and negative terminals 31a and 32b of the batteries 31 and 32 below the footboard are connected to each other, and the battery 3
2, 28 positive and negative terminals 32a and 28b are connected to each other, and positive and negative terminals 27a and 31 of batteries 27 and 31 are connected.
Connect b to each other. The charging terminal 23 is connected to the positive and negative terminals 28a and 27b of the batteries 28 and 27 below the seat.

Next, the function and effect of this embodiment will be described. In this embodiment, the battery 3 is provided in the space below the footboard 15a and the space below the left and right sides of the seat 18, respectively.
Since 1, 32 and 27, 28 are arranged, it is possible to mount four relatively large batteries in a limited disposing space and secure a sufficient capacity.

In this case, since the batteries 31 and 32 below the footboard are surrounded by the bent portions 5a and 5a of the left and right side frames 5 and 5 and the front and rear cross pipes 6 and 7, In the event of a fall, the frame member functions as a protective member, so that no external force acts directly on the battery. Therefore, the batteries 31 and 32 can be reliably protected and the occurrence of cracks and the like can be avoided.

As for the batteries 27, 28 below the seat, the seat rail portion 5b of the side frame 5 is bent inward in the vehicle width direction and disposed at this bent portion. It is located inside 5a. Therefore, in the event of a fall, the downward bent portion 5a also functions as a protection member for the batteries 27, 28, and this battery can also be protected.

Further, regarding the control unit 21 which is an electronic component, the seat rail 5b,
Since it is arranged between the 5b, the external force does not directly act on the control unit 21 even in the event of a fall or the like, the unit 21 can be reliably protected, and a failure can be avoided.

[0022]

As described above, according to the battery protection structure for an electric motorcycle of the present invention, the left and right bent portions of the vehicle body frame and the front and rear cross members surround the battery arranged below the footrest plate. Since it is enclosed, since this frame member functions as a protection member, external force does not act directly even in the event of a fall, and the battery can be reliably protected.

[Brief description of drawings]

FIG. 1 is a side view showing a battery protection structure for an electric motorcycle according to an embodiment of the present invention.

FIG. 2 is a plan view of the above embodiment.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an exploded perspective view of a battery box and the like after the above embodiment.

FIG. 6 is a perspective view of the front battery box of the above embodiment.

FIG. 7 is a wiring diagram of the battery of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric motorcycle 3 Head pipe 5 Side frame 5a Bending part 6 and 7 Front and rear cross pipes (cross members) 8 Seats 31 and 32 Battery A Foot mounting part

Claims (1)

[Claims] 1. A portion between a pair of left and right side frames between a head pipe and a seat is bent downward, and downward bent portions of the left and right side frames are bent forward,
A pair of rear cross members connect to each other to form a low-footed foot rest, a battery is mounted below the foot rest, and the front and rear cross members and the left and right downward bends around the battery. A battery protection structure for an electric two-wheeled vehicle, which is characterized by being surrounded by a part.