JP2843352B2 - Fuel tank device for scooter type vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fuel tank device applied to a scooter type vehicle in which a sheet metal fuel tank is housed inside a side cover.

BACKGROUND OF THE INVENTION In a scooter type vehicle, an operation seat is provided above a pair of left and right rear frames extending diagonally upward and rearward from a footrest, and a fuel tank is accommodated in a side cover extending downward from a lower edge of the operation seat. There is something. Here, the fuel tank is normally mounted and held on a frame that holds an operation seat. When this fuel tank is formed by joining a pair of press-formed upper and lower sheet metal halves to each other, it is necessary to fix a flange formed at a joint between the two halves to a frame supporting the operation seat. In addition, it is necessary to set the joint between the two halves at a high position near the lower surface of the operation seat.

Here, the width of the lower half cannot be made larger than that of the joint part due to press molding. On the other hand, the side cover is inflated so as to widen left and right from the lower edge of the driving seat. For this reason, the gap between the fuel tank and the side cover becomes large, especially when the joining portion comes to a high position as described above, and this gap becomes even larger, so that the space in the side cover cannot be sufficiently utilized, and the fuel tank However, there is a problem that the capacity cannot be increased.

(Object of the Invention) The present invention has been made in view of such circumstances,
It is an object of the present invention to provide a scooter-type vehicle fuel tank device capable of increasing the capacity of a fuel tank by sufficiently utilizing the space in a side cover.

According to the present invention, it is an object of the present invention to provide a low-floor footrest located between a steering wheel and a driving seat, and a load disposed below the driving seat and opened and closed by the driving seat. A storage box, a fuel tank disposed behind the storage box,
A scooter-type vehicle having a side cover extending downward from a lower edge of the operation seat and covering the storage box and the fuel tank, wherein the fuel tank extends obliquely upward and rearward from a footrest to pass under the storage box. And a pair of right and left rear frames extending downward from the rear of the storage box, and a substantially gate-type tower standing rearward from the rear frame and receiving a rear load of the operation seat, and pressing the fuel tank. A pair of molded front and rear halves made of sheet metal are joined together to be formed, while a flange-like joining surface of the fuel tank is arranged extending vertically in the vehicle body width direction behind the tower and disposed. This is achieved by a scooter-type vehicle fuel tank device characterized in that the front half of the fuel tank has entered the tower.

(Embodiment) FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a partially enlarged plan view thereof, FIG. 3 is a plan view showing a vicinity of a tail lamp, and FIG. 4 shows a fixing structure of a terminal plate. FIG. 5 is a view showing a support bracket for the end plate, FIG. 6 is a rear view of the end plate, FIG. 7 is a cross-sectional view near the joint of the fuel tank, and FIG. 8 is a plan view.

In FIG. 1, reference numeral 10 denotes a vehicle body frame, a main tube 14 extending obliquely rearward from the steering shaft barrel 12, and a pair of left and right rear frames 16 (16a, 16b, a front end of which is fixed to the main tube 14). 7). Rear frame
16 is almost horizontally rearward after being bent obliquely rearward in the vicinity of the middle. A horizontal footrest 18 is provided near the connection between the lower part of the main tube 14 and the front part of the rear frame 16. A leg shield 20 that stands upward is formed from the front end of the footrest 18, and the steering barrel 12 is located in the leg shield 20. A front fork 22 is held by the steering shaft barrel 12, and a steering front wheel 24 is held at a lower end thereof. 26 is a steering wheel.

A power unit 30 includes a forced air-cooled two-cycle single-cylinder engine 32, and a transmission case 34 extending rearward from one side of the engine 32, and a driving rear wheel 36 held at a rear end of the transmission case 34. It is. A V-belt continuously variable transmission is accommodated in the transmission case 34, and the output of the engine 32 is transmitted to the rear wheels 36 via this transmission. In the power unit 30, the upper surface of the crankcase of the engine 32 is pivotally supported by the bracket 16a of the rear frame 16 via a link, while the rear end of the transmission case is elastically supported by the cushion unit.

Numeral 40 denotes a luggage storage box, which is made of a material reinforced with synthetic resin such as polypropylene by glass fiber so as to have sufficient strength. The storage box 40 is formed so that the helmet 42 can be stored from above with the top part down, and a storage part 44 for tools and the like is integrally formed on the inside of the bottom, and a battery storage part 46 is integrally formed on the outside of the bottom. (FIG. 2). The storage box 40 is rigidly fixed to the vehicle body frame 10 at the bottom near the front and the opening edge at the rear. Ie storage box 40
Is in contact with a cross member 48 spanned between the left and right rear frames 16 and is screwed at two places from the inside of the storage box 40 to the left and right. A substantially horizontal seat load receiving portion 50 is integrally formed at a rear portion of the storage box 40, and a substantially gate-shaped tower 52 is welded to the rear frame 16 below the load receiving portion 50, as viewed from the rear. The part 50 is fixed to the tower 52 by two long bolts with the seat lock 54 interposed therebetween.

Reference numeral 58 denotes a fuel tank. The tank 58 is formed by seam welding a pair of front and rear halves made of a sheet metal press, and its flange-like joining surface 60 is substantially perpendicular to the rear frame 16 as shown in FIG. It is inclined diagonally. For this reason, each half can greatly swell in the direction of the press die removal within the range of the shape of the joint portion. For example, as shown in FIG. By bulging along the arc-shaped rear wall in plan view, the capacity can be increased.
In particular, by setting the direction of the press die to be substantially parallel to the rear frame 16, the lower part of the bulging portion can be formed so as to be substantially along the rear frame 16, so that the capacity of the bulging portion in front of the tank 58 is maximized. It is possible to increase to. The upper part of the joint surface 60 is fixed to a mounting part 62 formed on the tower 52 with two bolts, and the lower part of the joint surface 60 is fixed to the cross member 64 connecting the rear ends of the left and right rear frames 16 with two left and right bolts. Fixed. (See FIG. 4). In this way, the flange-shaped joint surface 60 is positioned substantially orthogonal to the rear frame 16 and positioned behind the tower 52 so as not to interfere with the tower 52, so that the joint surface 60 protrudes as compared with the case where the joint surface 60 is passed through the tower 52. Department of Tower
The fuel tank capacity can be further increased by being close to the inner side surface of the fuel tank 52.

Reference numeral 66 denotes a bracket which is fixed to the cross member 64 and stands upright. An end plate 98 described later is fixed to the bracket 66. The bracket 66 for fixing the end plate is substantially triangular as shown in FIG. 5, and three points A, B and C on the lower side thereof are screwed to the cross member 64. The screw hole B at the center
Is located in a direction more than the other screw holes A and C as shown in FIG. At the upper end of the bracket 66, a screw hole D, a downwardly engaging hook E, and a lamp hole F are sequentially formed below the screw hole D. The lower mounting portion 68a of the carrier 68 is fixed to the screw hole D. A pair of left and right upper mounting parts 68b of the loading platform 68
Is fixed together with a long bolt together with the load receiving portion 50 of the storage box 40.

Reference numeral 70 denotes a side cover extending downward from a lower edge of the driving seat 84 described later. The side cover 70 is integrally formed of synthetic resin so as to surround the periphery of the storage box 40.
While continuing smoothly to 18, the rear portion is a flat portion 72 which is substantially horizontal below the front portion of the loading platform 68, and is largely open rearward. The fuel supply port 58a of the fuel tank 58 is viewed from the opening provided in the flat portion 72 of the side cover 70 to the lower front of the loading portion of the loading platform 68 (that is, behind the rising grip portion 68c). A one-push mounting type fuel cap 74 is attached. A cylindrical oil-resistant seal member 76 is mounted around the fuel filler port 58a so as to be sandwiched between the flat portion 72 and the tank 58 (FIG. 2). Is prevented from flowing into the side cover 70.

84 is the driving seat, 86 is the seat bottom plate of this driving seat 84
86, the lower surface of the front end of the seat bottom plate 86 is pivoted to the front end of the storage box 40.
Linked by 88. At the rear of the seat bottom plate 86, a pair of left and right seating portions 90 (only one is shown in FIG. 2) that abut the seat load receiving portion 50 of the storage box 40 are integrally formed. A U-shaped hook 92 hangs from between the two seating portions 90 of the seat bottom plate 86, and the hook 92 is attached to the load receiving portion 50 of the storage box 40.
The seat lock 54 is adapted to be disengaged from the seat lock 54 through a window provided in the seat lock 54. A rib 94 facing the left and right upper edge and the rear upper edge of the side cover 70 projects downward from the seat bottom plate 86, and a rubber band-shaped sealing material attached to the rib 94 is provided.
96, when the operation seat 84 is closed, contacts the upper edge of the side cover 70 to seal the storage box 40.

Next, the end plate 98 will be described. The end plate 98 has a terminal plate 98A for closing the opening at the rear end of the side cover 70, and a tail light board 98B.
And the license plate mounting portion 98C are integrally formed. On the rear surface of the end plate 98, there is a downward engaging claw 98D that engages with the engaging claw E of the bracket 66, and a substantially lower engaging claw 98D protruding below the claw 98 so as to be screwed to the cross member 64. Bottom conical screwing seats 98E, 98E are formed.

The end plate 98 engages the engaging claw 98D with the engaging claw E of the bracket 66 from above, and fixes the screwing seat 98E to the class member 6.
Installed by screwing to 4. In this state, the end plate 98A and the taillight board 98B are attached to the side cover 70.
Enter inside the opening edge 70A (see FIG. 4) at the rear end.
A gap δ pointing backward is formed between the peripheral edge of the side cover 8 and the opening edge 70A of the side cover 70, and the hot air in the side cover 70 is exhausted backward from this gap δ (fourth,
6).

(Effect of the Invention) As described above, according to the present invention, a pair of left and right rear frames are extended obliquely upward and rearward from the footrest so as to reach the lower part of the fuel tank through the lower side of the storage box. While providing a substantially gate-shaped tower standing up from the rear frame and receiving the rear load of the driving seat, the fuel tank is formed by joining a pair of pressed front and rear halves to each other to form a flange shape of both halves. Since the joint surface of the above is arranged so as to extend in the vertical direction and the width direction of the vehicle body on the other side from the tower, and the former half has entered the tower,
Each half can be greatly expanded in the pressing direction, that is, back and forth within the range of the shape of the joint. Therefore, the front half can be deeply penetrated into the tower and greatly expanded up to the inner surface of the tower and the rear wall of the storage box, so that the capacity of the fuel tank can be increased. In addition, the shape of the joint can be adjusted to the shape of the side cover, and the rear frame is located below the fuel tank, so the lower half of the fuel tank can be shaped into the side cover without interfering with the rear frame. It is possible to increase the left-right width along the side, and it is possible to effectively utilize the space in the side cover to increase the fuel tank capacity.

[Brief description of the drawings]

1 is a side view of one embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view thereof, FIG. 3 is a plan view of the vicinity of a tail lamp, FIG. 4 is a side cross-sectional view showing a fixing structure of a terminal plate, FIG. 5 is a view showing a support bracket for the end plate, FIG. 6 is a rear view of the end plate, FIG. 7 is a cross-sectional view in the vicinity of a joint portion of the fuel tank, and FIG. 8 is a plan view. 16 ... rear frame, 18 ... footrest, 26 ... steering wheel, 36 ... rear wheel, 40 ... storage box, 52 ... tower, 58 ... fuel tank, 60 ... joint surface, 70 ... … Side cover, 84 …… driving seat.

Claims (1)

(57) [Claims] 1. A low-floor footrest located between a steering handle and a driving seat, a luggage storage box disposed below the driving seat and opened and closed by the driving seat, and a rear of the storage box. And a side cover extending downward from a lower edge of the operation seat and covering the storage box and the fuel tank, wherein the storage box extends obliquely upward and rearward from a footrest. A pair of left and right rear frames that pass below the fuel tank and below the fuel tank, and a substantially gate-shaped tower viewed from the rear that receives the rear load of the operation seat from the rear frame adjacent to the rear of the storage box and standing up from the rear frame. And a pair of front and rear sheet metal halves formed by press-molding the fuel tank are joined to each other,
A flange-like joining surface of the fuel tank is disposed extending vertically and in the vehicle width direction behind the tower, and a front half of the fuel tank is inserted into the tower. Fuel tank device for a scooter type vehicle.