JP3164422B2 - Motorcycle fuel tank device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank device for a motorcycle having a fuel tank disposed below a seat, and more particularly, to a tray formed of a flexible member for receiving fuel overflowing from an injection portion of the fuel tank. The present invention relates to a fuel tank device.

[0002]

2. Description of the Related Art In a motorcycle, a fuel tank is disposed below a seat which can be freely opened and closed, and an injection portion of the fuel tank is located close to below the seat, and a flexible member is provided at the injection portion. Some are provided with a formed saucer. When the fuel overflowing from the injection portion or the like is received by the tray, it adheres to the inner surface of the side wall of the tray. On the other hand, when the seat is closed, the side wall of the tray is pressed by the bottom plate, and the side wall is tilted outward and expands, and as a result, the fuel attached to the inner surface of the side wall adheres to the bottom plate of the sheet and the bottom plate is May be soiled. The side wall of the pan rises straight upward, and it is necessary to have a certain height because it is to prevent the fuel that overflows and is trapped in the pan from flowing out of the pan and contaminating the surrounding area. . On the other hand, since this receiving tray is located below and below the seat, a large space cannot be taken between the seat bottom plate and the receiving tray due to space limitations. For this reason, when the sheet is closed, the side wall of the tray is repeatedly pressed down from above by the sheet bottom plate, the side wall is expanded outward, and the inner wall surface comes into contact with the sheet bottom plate. In some cases, the side wall of the tray may be plastically deformed so that the side wall of the tray expands outward.
In order to prevent outward deformation of the side wall of the tray, for example, it is conceivable to increase the thickness of the side wall of the tray. Due to the arrangement of being pressed by the bottom plate of the sheet, the above problem cannot be solved only by increasing the thickness of the side wall.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is provided with a receiving tray provided in a fuel injection portion when a seat of a motorcycle is closed, the side wall of which is held down by a seat bottom plate. In order to prevent the side wall from opening outward and being deformed when pressed by the seat bottom plate, the shape and structure of the fuel tank can be provided even in a narrow arrangement space. The task is to do so.

[0004]

Means taken to solve the above problem is to provide a fuel tank disposed below an openable and closable seat, and to form a flexible member at an injection portion of the fuel tank. Provided with a saucer, when the seat is closed, when the side wall of the saucer is pressed by a seat bottom plate, assuming a motorcycle fuel tank device, the side wall of the saucer is curved inward, and the seat bottom plate is When pressed down, the side wall curves into the inside of the pan.

[0005]

The side wall of the tray formed of a flexible member provided at the injection portion of the fuel tank is curved inwardly of the tray so that when the seat is closed and pressed by its bottom plate, it is curved inwardly. Therefore, when the sheet is repeatedly pressed by the bottom plate of the sheet, the side wall of the tray formed of the flexible member may fall inside but not fall outside. And even if the side wall falls down inward, the seat bottom plate hits the outer side surface of the side wall and does not come into contact with the inner side surface contaminated with fuel. Further, even if the material of the flexible member deteriorates and the side wall of the receiving tray is deformed, it is not deformed outward but deformed inwardly. It does not come into contact with the inner surface that has been soiled by the.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view of a motorcycle, and FIG.
Is a plan view of the motorcycle, FIG. 3 is a side view of the rear part of the motorcycle, FIG. 4 is a plan view of the rear part of the motorcycle, FIG. 5 is a side view of the oil tank, FIG. 6 is a plan view of the oil tank, and FIG. It is a side view showing the state where the saucer was attached to the fuel tank. In the drawing, reference numeral 1 denotes a vehicle body frame, a steering shaft 3 is provided on a head pipe 2, and a front fork 4 is provided on the steering shaft 3. A front wheel 5 is supported at a lower portion of the front fork 4, and a handle 6 is mounted at an upper portion.

A main frame 7 extending rearward is connected to the head pipe 2, and a connecting portion between the head pipe 2 and the main frame 7 is reinforced by gussets 8 and 9. A pair of right and left rear frames 10 are connected to the rear portion of the main frame 7. The rear frames 10 extend rearward and slightly downward, and then bend and extend slightly rearward and upward.
A reinforcing frame 11 is connected to the upper side of each of the rear frames 10, and front connecting portions of the rear frames 10 are reinforced by gussets 12 and 13. The front sides of the head pipe 2, the main frame 7, the rear frame 10, and the reinforcing frame 11 are covered with a front upper cover 14 and left and right front side covers 15. A front rear fender 16 and a rear rear fender 17 are provided at a rear portion between the respective rear frames 10. A rear arm bracket 18 extending downward is welded to a center portion of the rear frame 10.
8, a pivot shaft 19 is provided. The pivot shaft 19 has a front side 20 a of a pair of left and right rear arms 20.
The rear wheel 20 is provided on the rear side 20b of the rear arm 20.

[0008] Between the pair of left and right rear arms 20,
The front cross member 22 and the rear cross member 23 are welded so as to face downward, and the facing front cross member 22 and rear cross member 23 are connected to the bracket 2.
4 are connected. This bracket 24 has a mounting portion 2
The mounting portion 25 has a rear cushion 26.
A lower portion 26a of the rear cushion 26 is rotatably supported via a support pin 27, and an upper portion 26b of the rear cushion 26 is
Is rotatably provided via a support pin 29. The bracket 28 is welded to a cross pipe 30 provided between the pair of left and right rear frames 10 and a cross pipe 31 provided between the reinforcing frames 11. A bracket 32 is welded to the front side of each rear frame 10, and an engine 33 is attached to the bracket 32.
The upper portion 33a of the engine 33 is supported via a support pin 34, and the rear portion 33b of the engine 33 is supported by the pivot shaft 19 together with the front side 20a of the rear arm 20. An exhaust pipe 35 is connected to the front lower portion of the cylinder 33c of the engine 33. The exhaust pipe 35 extends from the lower part of the engine 33 to the right rear side, and a silencer 36 is connected to the rear of the exhaust pipe 35.

An intake pipe 37 is connected to an upper portion of the engine 33, and a carburetor 38 is connected to the intake pipe 37. An air cleaner 39 is connected to the carburetor 38. The air cleaner 39 is disposed between the pair of left and right rear frames 10, and the air cleaner 39 extends upward, and air is sucked in from an intake port 39a opened rearward. A screw 40 is provided at a lower portion of the air cleaner 39, and the screw 40 is attached to a stay 42 provided on the cross pipe 41.
To the cross pipe 4
1 is provided on the rear arm bracket 18. The upper part of the air cleaner 39 is attached to the bracket 44 with screws 4.
5, the bracket 44 is welded to the reinforcing frame 11 and a support pipe 46 welded to the reinforcing frame 11.

Further, the engine 3 is mounted on the reinforcing frame 11.
A CDI unit 47 for controlling the ignition timing of No. 3 is supported, and a rectifier regulator 48 is supported by a bracket 28. Further, a case 49 is fixed to the bracket 44, and the battery 5 is attached to the case 49.
The battery 50 is held by a band 51. A main oil tank 52 is connected along the rear frame 10 on the right side.
The rear part is connected to the sub oil tank 5 via an oil hose 53.
The sub oil tank 54 is disposed between the rear portions of the left and right rear frames 10. The oil injection section 55 of the sub oil tank 54 is connected to the upper part of the main oil tank 52 via an air vent hose 56. A pin 57 is provided at a lower center portion of the main oil tank 52, and the pin 57 is inserted into and supported by a grommet 59 provided on a stay 58 of the rear frame 10 on the right side. The support 60 has a rear upper portion 52b on the right rear frame 1
0 is fixed to the support member 61 with screws 62 and 63, respectively. Further, the sub oil tank 54 is fixed to a bracket 64 provided between a pair of left and right rear frames 10 with screws 65 and 66 on the rear side. An oil hose 67 is connected to the front side of the main oil tank 52, and the oil hose 67 is connected to the engine 33.
Is connected to an oil pump 68 provided at

Thus, the main oil tank 52,
The oil tank 53 is divided into two parts, and an oil hose 53 and an air vent hose 56 are connected between the two parts to increase the degree of freedom in the layout of the oil tank, thereby increasing the tank capacity, lubrication, design and manufacturing. The above constraint can be greatly improved.

A fuel tank 69 is disposed between the pair of right and left rear frames 10 above the front rear fender 16.
The rear side is supported by brackets 70a and 70b provided on the rear frame 10. This fuel tank 69
Is connected to a supply pump 72 via a fuel hose 71, and the supply pump 72 is connected to the carburetor 38 via a fuel hose 73. The fuel tank 69 is disposed below the seat 74, and the injection portion 75 of the fuel tank 69 is located near the bottom plate 76 of the seat 74. A receiving plate 77 formed of, for example, a flexible member made of rubber is attached to an injection portion 75 of the fuel tank 69, and a front side 77b of a side wall 77a rising above the receiving plate 77.
Are formed to curve inward. In this example, since only the front side wall 77b contacts the bottom plate 76 of the sheet due to the positional relationship with the sheet, the front side 77b of the side wall 77a rising above the tray 77 is formed to be curved inward. However, the entire periphery of the side wall 77a is formed to be curved inward depending on the arrangement relationship with the sheet.

The side wall 77a of the tray 77 provided at the injection portion 75 of the fuel tank 69 rises straight upward, and has a certain height to receive the overflowing fuel. For this reason, since the receiving tray 77 is located close to the bottom plate 76 of the sheet 74, the front side 77b of the side wall 77a is pushed from above by the bottom plate 76 of the sheet 74, but since the front side 77b is bent inward, Therefore, the sheet does not expand and deform, and therefore, the bottom plate 76 of the sheet does not come into contact with the inner surface on which the fuel is adhered and is contaminated, and is not contaminated with the fuel. Further, since the receiving tray is configured as described above, it is possible to provide the injection portion 75 of the fuel tank 69 even with a narrow arrangement space.

In this example, the tray 77 is also used as a tray for the sub oil tank 54. A discharge pipe 78 is connected to the front bottom of the tray 77, and a hose 79 is connected to the discharge pipe 78, and a tip 79 a of the hose 79 is located at a rear position of the engine 33.
The fuel that overflows to the rear of the engine 33 is guided downward and discharged.

A bracket 80 is attached to the front side of the bottom plate 76 of the seat 74, and the bracket 80 is rotatably supported via a support pin 82 on a stay 81 welded to the support pipe 46. It can be opened and closed forward with the pin 82 as a fulcrum. This sheet 7
4, the bottom plate 76 is provided with dampers 83, 84, 85,
The front damper 83 is supported by the bracket 44 provided on the reinforcing frame 11, and the rear dampers 84 and 85 are supported on the upper part of the fuel tank 69. Bottom plate 76 of seat 74
At the rear, a fixture 86 is attached.
Is locked by a locking member 87 of a bracket 64 provided between the pair of left and right rear frames 10. This lock 8
7 automatically locks to the mounting member 86 of the seat 74 when the seat 74 is mounted, and the locking member 87 is released by operating the lock key 88.

The front lower part of the seat 74 is covered by a rear front cover 89, the both sides of the seat 74 are covered by a rear side cover 90, and the rear parts of the both rear side covers 90 are connected by a tail lamp cover 91. I have.

[0017]

As described above, the motorcycle fuel tank device according to the present invention has the receiving portion formed of a flexible member at the injection portion of the fuel tank, and the side wall rising above the receiving portion is curved inward. Therefore, even if the side wall rising above the tray closes the sheet and is pushed from above, the side wall is curved inward. Therefore, the side wall rising above the tray does not expand outward and deform, and the bottom plate of the sheet does not abut against the inner side wall of the tray that is contaminated with fuel. There is no fouling by fuel adhering to the inner side wall. Further, since the receiving tray is configured as described above, it is possible to provide the injection portion 75 of the fuel tank 69 even with a narrow arrangement space.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle.

FIG. 2 is a plan view of the motorcycle.

FIG. 3 is a side view of a rear portion of the motorcycle.

FIG. 4 is a plan view of a rear portion of the motorcycle.

FIG. 5 is a side view of the oil tank.

FIG. 6 is a plan view of an oil tank.

FIG. 7 is a side view showing a state where a tray is attached to the fuel tank.

[Explanation of symbols]

 69 ... fuel tank 74 ... seat 75 ... injection part 77 ... tray 77 a ... side wall

Claims (1)

(57) [Claims] 1. A fuel tank device for a motorcycle, wherein a fuel tank is disposed below a seat which is freely opened and closed by a hinge, and an injection portion of the fuel tank is located close to a bottom plate of the seat. A tray formed of a flexible member is provided at the filling portion of the tank, and when the side wall rising upward and curving inwardly closes the sheet and abuts against the bottom plate, the side wall becomes a bottom plate of the sheet. A fuel tank device for a motorcycle, wherein the fuel tank device is configured to be pushed and bent inward.