JPH06122388A - Fuel tank for motorcycle and motortricycle - Google Patents

Abstract

PURPOSE:To improve the degree of freedom in designing a car body related to the installation of a fuel tank, improve the outside appearance on the periphery of the fuel tank, increase the inside capacity of the fuel tank, and permit to freely design the shape. CONSTITUTION:As for a fuel tank 1 for a motorcycle or motortricycle which has a nearly inverted U-shaped longitudinal section and is installed, riding over a car body frame 3, the left and right tubular members 10L and 10R in pair which penetrate in the car width direction through the left and right side parts 1L and 1R of the fuel tank 1 are fixedly installed. Each inner flange is installed on the car body frame 3 side of the tubular members 10L and 10R. The left and right tightening board seats 15L and 15R in pair are installed on the car body frame 3, and the fuel tank 1 is fixed on the car body frame 3 by tightening a tightening member (bolt 18) which is inserted to the tubular members 10L and 10R from the car body side, on the tightening board seats 15L and 15R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank for motorcycles having an improved fixing structure to a vehicle body frame.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, many fuel tanks 100 for motorcycles have a substantially U-shaped vertical cross section and are mounted on a vehicle body frame 101. . Generally, a pair of left and right tank stays 102L and 102R are fixed to both side portions of the fuel tank 100 by welding or the like.
The fuel tank 100 is fixed to the vehicle body frame 101 by fastening the 2L and 102R to the pair of left and right fastening pedestals 103L and 103R provided on the vehicle body frame 101 with fastening members such as bolts 104. There is.

[0003]

However, when the fuel tank 100 is fixed to the vehicle body frame 101 in this way, the tank stays 102L and 102R need to be provided in the contour portion of the fuel tank 100. 102L, 102R and fastening pedestal 103L,
The mounting position of 103R is significantly limited, which reduces the degree of freedom in vehicle body design, and the tank stays 102L, 10L
Since 2R is exposed to the outside, it was not preferable in terms of aesthetic appearance.

Moreover, the tank stays 102L and 102R
To provide the fuel tank 100, the side profile (10
It is necessary to partially reduce the size of the fuel tank 100, which partially sacrifices the capacity of the fuel tank 100.
It was a cause that the 00 design was limited.

The present invention has been made in order to solve the above problems, and improves the degree of freedom in designing a vehicle body relating to the mounting of the fuel tank, improves the aesthetic appearance around the fuel tank, and, at the same time, improves the aesthetic appearance of the fuel tank. An object of the present invention is to provide a fuel tank for a motorcycle, which has an increased internal capacity and can be freely designed in its shape.

[0006]

In order to achieve the above object, a fuel tank for a motorcycle according to the present invention has an approximately inverted U-shaped vertical cross-section and is installed over a vehicle body frame. In a fuel tank of a two- or three-wheeled vehicle, a pair of left and right tubular members that penetrate the left and right side portions of the fuel tank in the vehicle width direction are fixedly provided, and inner flanges are provided on the body frame side of the tubular members and The frame is provided with a pair of left and right fastening pedestals, and the fuel tank is fixed to the vehicle body frame by fastening a fastening member inserted into the tubular member from the side of the vehicle body to the fastening pedestal.

[0007]

When the fuel tank of the motorcycle is constructed in this way, the tubular member and the fastening pedestal need not necessarily be provided near the contour of the fuel tank, so that the degree of freedom in designing the vehicle body is reduced. Greatly improved.

Moreover, since the fixing member such as the stay does not protrude to the contour of the fuel tank, the aesthetic appearance around the fuel tank is improved.

Furthermore, since the shape of the fuel tank can be determined regardless of the positions of the tubular member and the fastening member, the capacity of the fuel tank can be increased and the fuel tank can be designed in any desired shape. Become.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view of a motorcycle 2 provided with a fuel tank 1 according to the present invention. The body frame 3 of the motorcycle 2 is, for example, of a semi-double cradle type, an engine 6 is mounted between a main tube 4 and a down tube 5, and the fuel tank 1 is laid on the main tube 4. A seating seat 8 is placed on a seat rail 7 extending rearward.

FIG. 2 is a sectional view taken along line II-II of FIG.
1 shows an embodiment of the present invention. The fuel tank 1 is
A pair of left and right tubular members 10L and 10R having a substantially inverted U-shaped vertical cross-section and penetrating both left and right side portions 1L and 1R of the fuel tank 1 in the vehicle width direction are fixed by welding or the like.

As shown in FIG. 3, the tubular member 10L,
An inner flange 12 is integrally formed on the body frame 3 side of 10R. A rubber bush 13 is fitted into the inner flange 12, and a spacer 14 is inserted into the rubber bush 13.

On the other hand, the body frame 3 is provided with a pair of left and right fastening pedestals 15L and 15R. The fastening bases 15L and 15R are, for example, the bracket 1 having a U-shaped cross section.
The nut 17 is fixed to the No. 6 unit. Then, a fastening member such as a bolt 18 inserted into the tubular members 10L and 10R from the side of the vehicle body is passed through the spacer 14, and the bolt 18 is fastened to the fastening pedestals 15L and 15R, whereby the fuel tank 1 is mounted on the vehicle body frame 3. Fixed to.
The elasticity of the rubber bush 13 supports the fuel tank 1 in a vibration-proof manner.

In the case of the above structure, the pair of left and right tubular members 10L and 10R need not necessarily be provided in the vicinity of the contour of the fuel tank 1.
The 0L and 10R and the fastening pedestals 15L and 15R can be provided in relatively free places, and the degree of freedom in designing the vehicle body for mounting the fuel tank 1 is greatly improved.

Moreover, since the fixing member such as the tank stay does not stick out to the outside of the contour of the fuel tank and is not exposed to the outside as in the conventional case, the aesthetic appearance around the fuel tank 1 is improved. The tubular members 10L, 10R are fitted with caps or the like into the openings 19L, 19R to be opened on the side surface of the fuel tank 1 to make a point on the appearance, and parts such as a radiator cover are attached to the openings 19L, 19R. It may be fixed.

Further, since the shape of the fuel tank 1 can be determined regardless of the positions of the tubular members 10L, 10R and the fastening pedestals 15L, 15R, the capacity of the fuel tank 1 can be increased and the fuel tank 1 can be designed in any desired shape. Will be able to.

The left and right side portions 1 of the fuel tank 1
By fixing the tubular members 10L and 10R to the L and 1R, the rigidity of the fuel tank 1 itself is improved, so that the strength against the impact from the side is increased and dents are less likely to occur.

[0019]

As described above, the fuel tank for a motorcycle according to the present invention has a substantially U-shaped vertical cross section, and the fuel for the motorcycle is mounted on the vehicle body frame. In the tank, a pair of left and right tubular members that penetrate the left and right side portions of the fuel tank in the vehicle width direction are fixedly provided. Inner flanges are provided on the body frame side of the tubular members and a pair of left and right body members are provided on the body frame. Is provided, and the fuel tank is fixed to the vehicle body frame by fastening the fastening member inserted into the tubular member from the side of the vehicle body to the fastening pedestal.

With this structure, the tubular member and the fastening member do not have to be installed at positions near the contour of the fuel tank, so that the degree of freedom in designing the vehicle body for mounting the fuel tank is greatly improved. To do.

Further, since the fixing member such as the stay does not protrude to the contour of the fuel tank, the aesthetic appearance around the fuel tank is improved.

Further, since the shape of the fuel tank can be determined regardless of the positions of the tubular member and the fastening pedestal, the capacity of the fuel tank can be increased and the fuel tank can be designed in any desired shape.

[Brief description of drawings]

FIG. 1 is a left side view of a motorcycle equipped with a fuel tank according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1, showing an embodiment of the present invention.

FIG. 3 is a detailed cross-sectional view of a tubular member and a fastening pedestal.

FIG. 4 is a left side view of the vicinity of a fuel tank, showing a conventional technique.

5 is a cross-sectional view taken along the line VV of FIG.

[Explanation of symbols]

 1 Fuel Tank 1L, 1R Both Sides of Fuel Tank 3 Body Frame 10L, 10R Tubular Member 12 Inner Flange 13 Rubber Bushing 14 Spacer 15L, 15R Fastening Pedestal 18 Bolt to be Fastening Member

Claims (1)

[Claims] 1. In a fuel tank for a motorcycle having a substantially U-shaped vertical cross section and extending over a vehicle body frame, the left and right sides of the left and right side portions of the fuel tank are respectively penetrated in the vehicle width direction. A pair of tubular members are fixed, and inner flanges are provided on the body frame side of the tubular members, and a pair of left and right fastening pedestals are provided on the body frame. A fuel tank for a motorcycle, characterized in that the fuel tank is fixed to a vehicle body frame by being fastened to the fastening base.