JPS62103276A - Fuel tank fixture for motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for mounting a fuel tank in a motorcycle.

[Prior art]

Fuel tanks for motorcycles are constructed by welding and assembling deep-drawn sheet metal parts or adhesively assembling plastic moldings, but in either case, the structure is made by joining together thin-walled moldings, and in general, it is difficult to avoid vibrations during driving (engine vibration, etc.) or (i
In order to prevent cracks and peeling of joints due to impact, it is installed to the vehicle body frame using anti-vibration means such as anti-vibration rubber.

(Problem to be solved by the invention) By the way, conventional equipment for mounting fuel tanks on motorcycles generally involves fitting rubber grommets or collars into brackets for mounting to the vehicle body frame. A method of screw fastening was used.

However, such conventional anti-vibration mounting has a problem in that the structure does not have a sufficient anti-vibration effect, and furthermore, it requires time and effort for assembly work such as bolt fastening.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel tank mounting device for a motorcycle that can solve the problems of the prior art, has a vibration-proofing effect, and is easy to mount the fuel tank.

[Means for Achieving the Object] The present invention includes dampers made of rubber-like elastic material fitted to the left and right seat rails and the left and right lower members of the vehicle body frame, and step portions formed at the top, bottom, left and right of the fuel tank are Due to the configuration in which the fuel tank is held under pressure by being brought into pressure contact with the damper,
This aims to achieve the above objectives.

〔Example〕

The present invention will be specifically described below with reference to the drawings.

FIG. 4 shows a motorcycle implementing the present invention.

In FIG. 4, a front fork 2 is attached to the front part of the body frame 1 via a steering head, and a front wheel 3 is suspended by the front fork 2. On the other hand, a swing arm 4 and a shock absorber are attached to the rear part of the body frame 1. A rear wheel 6 is suspended via the wheel 5.

An engine 7 that drives rear wheels 6 and a fuel tank 8 are mounted in the center of the vehicle body frame 1.

At the top of the vehicle body frame 1 are a seat (front seat) 9 for the driver and a seat (rear seat) 1 for the passenger.
0 is attached.

Further, a handle 11 is fixed to the upper part of the front fork 2, and a navel lamp 12 is attached to the front surface of the handle 11.

The driver sits on the front seat 9, grips the steering wheel 11, and drives the vehicle.

Figure 1 shows the structure of the vehicle body frame l and the body frame l.
The attachment of the fuel tank 8 to the device is shown in FIG. 2, and FIG. 2 shows a cross section along plane nn in FIG.

In FIG. 1, the vehicle body frame l includes a frame front portion 20 having left and right main members 22, 22 welded to a steering head 21, and left and right seat rails 23, 23.
It has a split structure in which the frame rear part 25 and the left and right lower members 24° 24 are welded together are formed separately and assembled by fastening them with bolts and nuts.

The left and right main members 22, 22 have a loop shape, and the engine 7 is mounted inside them.

Further, the front seat 9 and the rear seat 10 are mounted on the left and right seat rails 23.23, and the left and right seat rails 23.23 and the left and right lower members 24.
A fuel tank 8 is installed in the space between the fuel tank 24 and the fuel tank 8.

In addition, the frame front part 20 and the frame rear part 25 are
They are assembled separably from each other using bolt and nut fastening means 26 at four locations on the top, bottom, left and right, and the vehicle body frame 1 is constructed as a whole.

FIG. 2 shows a cross section of the fuel tank 8 mounting portion.

In Figures 1 and 2, the left and right seat rails 23
．． A damper 27 made of a rubber-like elastic material is fitted to each of the left and right lower members 23 and 24.

On the other hand, stepped portions 28 are formed on the upper, lower, left and right sides of the fuel tank 8, and are held in pressure contact with each damper 27 mounted on the vehicle body frame 1.

That is, after the damper 27 is attached to the seat rail 23.23 and the lower member 24.24, the fuel tank 8 is installed inside the frame rear part 25, that is, the left and right seat rails 2.
3.23 and the left and right lower members 24. By inserting it into the space inside the left and right lower members 24, the upper, lower, left and right step portions 2
8 is mounted in a state where it is held under pressure by each damper 27.

This fuel tank 8 is normally attached to the front part of the frame 20.
This is done by inserting it from the front of the frame rear part 25 before joining the frame rear part 25 to the frame rear part 25.

As shown in FIGS. 1 and 4, the fuel tank 8 has a head 29 extending forward and upward (towards the front of the front seat 9).
and an inlet 30 with a cap on the top surface of the head 29.
is provided. This inlet is for steering head 2
The fuel tank cover 31 is located at an opening on the upper surface of a tank cover 31 installed between the fuel tank cover 1 and the front seat 9, so that fuel can be easily refilled from the outside.

Also, the installation of the fuel tank 8 is done using the damper 2 explained above.
Although it is possible to do this with only 7, if necessary, a bracket may be provided on another part of the fuel tank 8 (usually the front upper part) and connected to the vehicle body frame 1 via a damper by insertion or screw fastening. Accordingly, it is possible to obtain a structure in which the positioning of the fuel tank 8 and load sharing are performed.

In addition, as shown in FIG. 2, the left and right seat rails 23.
The damper 27.27 fitted and attached to the front seat 9 is also used as a seat, and by supporting the seat load with the damper 27.27, the vibration of the front seat 9 is reduced and the riding comfort is improved. It is planned.

3(A) and 3(B) illustrate the shape of the damper 27, which has a shape formed by intersecting a circumferential lip 27B and a vertical rib 27C on the surface of a cylindrical main body 27A. As the material, for example, synthetic rubber having a JIS hardness of about 50 is used.

In addition, if necessary, divide it into one place on the circumference as shown in the diagram.
7D may be provided so that the split 27D can be expanded and fitted to the seat rail 23.degree. 23 and the lower member 24.24.

According to the embodiment described above, the stepped portions 28 formed on the top, bottom, left and right sides of the fuel tank 8 are held under pressure by the dampers 27 fitted and attached to the vehicle body frame 1, so that the main body of the fuel tank 8 is The fuel tank can be directly supported by the dampers 27, and the size and shape of each damper 27 can be set sufficiently large, so that a fuel tank mounting device with excellent vibration-proofing effects can be obtained.

In addition, the fuel tank 8 can be installed by simply pressing and inserting it into the vehicle body frame 1, and the conventional structure does not require brackets or bolt/nut fastening means.
Therefore, it is possible to reduce the number of parts and improve assembly workability.

In the illustrated embodiment, the seat rails 23, 23 and the lower members 24, 24 are circular pipes, and each damper 27 is also circular in cross section. You can freely select an oval shape or other shape.

Further, the present invention can be widely used regardless of the material structure, such as when the fuel tank 8 is formed from a metal plate such as a steel plate or an aluminum plate, or when formed from plastic (including reinforcing fibers).

〔Effect of the invention〕

As is clear from the above description, according to the present invention, there is provided a fuel tank mounting device for a motorcycle that has excellent vibration damping effects and allows easy mounting of the fuel tank.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fuel tank installation device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along plane n-n in FIG. 1, and FIG.
Figures (A) and 3 (B) are a side view and BB sectional view showing an example of a damper, and Figure 4 is a left side view of a motorcycle suitable for applying the present invention. 1...-Vehicle frame, 8--Fuel tank, 9--
Front seat, 23-- Seat rail, 24-...
-Lower member, 27-...-damper, 28--single step part (fuel tank). Agent Patent attorney Yasushi Ooto Figure 3 (A) (B) Voluntary amendment to the procedure) January 24, 1986 3. Relationship with the case of the person making the amendment Patent applicant address Chuo-ku, Kobe City, Hyogo Prefecture 3-1-1 Higashiyosakicho Name (097) Kawasaki Heavy Industries Co., Ltd. Representative Long diameter 1* Hiroshi 4, Agent 101 Address Kyodo Building, 3-3-9 Kanda Kajicho, Chiyoda-ku, Tokyo ( yi-F- ((:田) No. 73 No. 5, voluntary addition of the date of the amendment order, and extension of the lead line numbered 8.

Claims (1)

[Claims] (1) Dampers made of rubber-like elastic material are fitted to the left and right seat rails and the left and right lower members of the vehicle body frame, and the stepped portions formed on the top, bottom, left and right of the fuel tank are brought into pressure contact with each damper, thereby compressing the fuel tank. A motorcycle fuel tank mounting device characterized by holding a fuel tank.