JPS604860Y2 - Fuel tank mounting structure for motorcycles, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of mounting a fuel tank on a motorcycle, a three-wheeled motor vehicle, or the like.

Conventionally, in motorcycles in which a linear fuel tank with tank parts on the left and right sides is placed on the top of the main frame connected to the head pipe, with the main frame sandwiched between the two tank parts, the fuel tank is Mounting sections are provided at the front and rear of the tank, and these sections are attached to the vehicle body.

When mounting the fuel tank on the vehicle body in this way, due to the conditions such as the vehicle frame and fuel tank shape, the front mounting point and the rear mounting point should be connected by a straight line (this is the mount line). The center of gravity is often located close to the

In addition, the above-mentioned mounting is usually structured to attach the fuel tank to the vehicle body through a cushioning rubber to prevent vibrations and other problems, and this causes the fuel tank to roll around the mounting line as a center line. easy.

This invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and aims to provide a structure for mounting a fuel tank on a motorcycle or the like in which rolling does not occur in the fuel tank.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a head pipe of a motorcycle, 2 is a rear frame, 3 is a main frame that connects the head pipe 1 and the rear frame 2, and 4 is a fuel tank.

As shown in FIG. 2, this fuel tank 4 has a linear shape with tank parts 4av4a on the left and right sides, and extends across the main frame 3, that is, both tank parts 4a, 4a sandwich the main frame 3. It is arranged.

The fuel tank 4 has a front part and a mounting part 5,
It is attached to the main frame 3 at 6.

4b is the bottom plate of the fuel tank 4.

To explain the front attachment section 5, as shown in FIG. 3, the left and right tank sections 4a of the fuel tank 4 are attached.

A front stay 40 bent into a substantially U-shape with an open front is fixed to both inner side surfaces (bottom plate 4b) of the main frame 4a, and a collar 8, which is a main frame 3 covered with a cushioning rubber 7, is attached to the vehicle body side. The collar 8 is fitted to the front stay 4C, and the front part of the fuel tank 4 is attached to the vehicle body.

A indicates the center line in the width direction of the vehicle body.

To explain the rear mounting part 6, it is fixed to the rear part of the fuel tank 4, and the Yasuchi 4d and main frame 3 are fixed to each other with tapped collars 10 and bolts 11 fixed to the main frame 3 via a buffer rubber 9. There is.

The above configuration is the same as the conventional one, and normally the center of gravity (arrow opening) of the fuel tank 4 is located at the mount line P, which is the straight line connecting part 5 for front mounting and part 6 for rear mounting. It's located very close.

In the present invention, a support member 12 is attached to the vehicle body at a lower position sufficiently away from the mount line P to restrain movement of the left and right tank portions 4a, 4a in the width direction of the vehicle body.

As shown in FIG. 5, this support member 12 includes a pipe portion 12a that is bent so that the center portion is lowered one step, and two mounting plate portions 12 that are welded to this pipe portion 12a.
b, and stopper rubbers 12c attached to both ends of the pipe portion 12a.

13 is the engine hanger plate, main frame 3
The mounting provided on the lower part 3a of the
and supports the upper part of the engine 16.

The mounting plate 12b of the support member 12 and the engine hanger plate 13 are collinear with the mounting section 3b of the main frame 3 by means of bolts 14.

When the engine hanger plate 13 is mounted, the rotation preventing portion 12d of the plate portion 12b touches the front edge of the engine hanger plate 13, thereby preventing rotation.

The support member 12 has stopper rubbers 12c at both ends.
are adapted to abut on both inner side surfaces of the left and right tank portions 4a, 4a of the fuel tank 4, which are formed near the outer ends in the left and right direction, respectively.

In the above configuration, the fuel tank 4 is connected to the mount line P
Even if an attempt is made to roll as shown by the arrow in FIG. Since the left and right tank parts 4a, 4a are restrained from moving in the width direction of the vehicle body by coming into contact with the surface, rolling of the fuel tank 4 is prevented.

The fuel tank 4 is supported by the support member 12 by a stopper rubber 12c having cushioning properties, and the support for the fuel tank 4 is provided at two locations in the conventional front mounting section 5, and in the rear mounting location in the conventional case. In addition to the one support point in 6, the left and right stop rubbers 12c provide two more support points, so minute vibrations of the fuel tank 4, etc. are effectively absorbed.

Further, since the support by the support member 12 is performed at a position sufficiently distant from the mount line P, it is efficient in terms of moment in preventing rolling and is also effective in preventing vibration.

As explained above, according to the present invention, the core-shaped fuel tank is attached to the front and rear of the vehicle body at a position midway between the parts, and both are mounted at a position downwardly apart from the straight line connecting the parts.
The support member that restrains the movement of both tank parts in the vehicle width direction is
The left and right ends of the tank parts were installed in the vehicle body so that they came into contact with the inner side surfaces formed near the outer ends of the tank parts from the inside, so that the front and rear attachments could be done by connecting the tank parts to the intermediate lower support member. When viewed from the side of the vehicle, the triangular fulcrum position is extremely appropriate for preventing tank rolling, and can effectively prevent tank rolling. It does not generate force and its durability is improved.

In addition, since the support member is positioned below the nuclear tank rather than above the U-shape, the parts related to the support member can be easily machined, and the tank can be installed and removed with ease. Easy to work with.

Furthermore, since the positions at which both ends of the support member contact the tank are near the outer ends, the moment arm for preventing the tank from rolling becomes longer, reducing the force applied to the support member and supporting the tank. Improves the durability of parts that contact the tank (stopper rubber, etc.).

If the fuel tank is supported by the support member via the stopper rubber, the number of support points is increased, and even minute vibrations of the fuel tank can be effectively prevented.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the main parts of a motorcycle, FIG. 2 is a partial cross-sectional view taken along arrow A in FIG. 1, and FIG. 4 is a sectional view taken along the line IV--VI in FIG. 1, FIG. 5 is a perspective view of the support member, and FIG. 6 is a sectional view taken along VI-VI in FIG. 1.
7 is an enlarged sectional view of section B in FIG. 2. 1... Head pipe, 2... Rear frame, 3... Main frame, 4...
Fuel tank, 4a...tank part, 4c'' front stay, 4d/curve/rear stay, 5, 6...
・・Mounting part, 12・・・Supporting member, 12a・・
...Pipe part, 12b...Mount on plate part, 12c...Stop rubber, 13.Curve, engine hanger plate, P...Mount line.

Claims (1)

[Scope of utility model registration request] The head pipe and the rear frame are connected by a main frame, and a linear fuel tank with tank parts on the left and right sides is arranged on the top of the main frame so that both tank parts sandwich the main frame. For motorcycles etc. in which the fuel tank is attached to the vehicle body at the front and rear mounting points, the front and rear mounting points are located in the middle of the two sections, and the two mounting points are located at a position that is downwardly apart from the straight line connecting the sections. A support member for restraining the movement of the tank section in the width direction of the vehicle body is provided on the vehicle body so that both left and right ends thereof abut from inside both inner side surfaces formed near the outer ends of both tank sections in the left and right direction, respectively. The structure of fuel tank installation in motorcycles etc. is characterized by: