JPS62134387A - Fixing device for fuel tank in car such as 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 fixing device for a fuel tank used in a vehicle such as a motorcycle.

[Prior art]

Conventionally, in motorcycles in which the fuel tank is installed on the left and right frame members extending rearward from the steering head pipe, the frame member is provided with a bracket that fits on the bottom of the front end of the fuel tank, and the fuel tank is placed behind the bracket. Provide another bracket to receive the bottom of the rear end,
The rear end of the fuel tank is bolted to this bracket.

[Problem that the invention seeks to solve]

However, this configuration requires brackets on the frame side to support at least the front and rear of the fuel tank, which complicates the frame configuration and causes problems such as increased cost and weight. there were.

[Means for solving problems]

Therefore, in the present invention, the bottom part of the fuel tank is extended between the frame members, and a relief part is formed on the side surface of this extension part to avoid the frame member and recess inward, and this relief part and the above-mentioned boiling Elastic bodies are interposed in a compressed state between the frame member that has now moved up and the other frame member that has moved up, and the frame member has a side surface of the fuel tank located between the front and rear elastic bodies. The present invention is characterized in that a pressing body is provided which is inserted and held from both the left and right sides, and this pressing body is fastened and fixed to the frame member via a screw member so that the film can be deposited on the frame member.

[Function] According to this configuration, the elastic body is pressed against the side surface and the top surface of the relief part of the fuel tank, so that the position of the fuel tank in the left and right and downward directions is regulated by this pressure contact, and the elastic body in front and rear The pressure contact surfaces with the relief portions are inclined upwardly and upwardly along the frame member, respectively, so that this inclination prevents displacement of the fuel tank in the front-rear direction, and also restricts the position in the front-rear direction. Therefore, by sandwiching the fuel tank between the pressing bodies in this state, the fuel tank can be positioned and fixed to the frame member.

Therefore, since the fuel tank is fixed between the frame members by simple pressure, the number of brackets that receive the fuel tank can be reduced compared to the conventional method, and the frame configuration including the fuel tank can be simplified accordingly. It becomes possible.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on drawings in which the present invention is applied to a motorcycle.

Reference numeral 1 in FIG. 5 is a frame, and a front fork 3 is pivotally supported on a steering head vibe 2 placed vertically at the front end of the frame. A pair of left and right main pipes 4, 4 extending in the front-rear direction are welded to the steering head vibe 2 as frame members, and these main pipes 4, 4 are tilted upward as they move forward, and are connected to the steering head vibe 2. The rear arm 5 is connected to a bracket 6 that pivotally supports the rear arm 5 in a substantially V-shape when viewed from the side.

The main pipes 4, 4 in this practical example are made by welding left and right halves 7a, 7b, which have a trowel-shaped cross section, against each other, and their vertical cross-sectional shape is 1ffi in the vertical direction. It is formed into a flat prismatic cylinder shape.

Bracket pieces 8, 8 are welded to the upper rear end of the main vibe 4.4, and left and right seat rails 9, which support the seat 10 as other frame members, are attached to the side surfaces of the bracket 8.8. 9 is bolted. The seat rail 9.9 extends rearward and upward diagonally at a certain intersection angle with the main pipes 4, 4, and the connecting portion between the seat rail 9.9 and the main pipe 4.4 has a substantially V-shape when viewed from the side. It is formed.

Further, a down tube 12 is installed between the lower surface of the front end of the main pipe 4.4 and the lower end of the bracket 6, and an engine 13 is installed in the space surrounded by the main pipes 4, 4 and the down tube 12. It is installed. A carburetor 15 is connected to the cylinder head 14 of the engine 13, and a box-shaped air cleaner 16 connected to the carburetor 15 is located directly above the engine 13 and between the air cleaner 16 and the seat 10. A fuel tank 17 is installed.

This fuel tank 17 is provided astride between the main pipes 4, 4 and the seat rails 9, 9, and the fixing structure of this fuel tank 17 will be explained below with reference to FIGS. 1 to 4. .

That is, the first half of the fuel tank 17 is placed on the boiled main pipe 4.4, and the second half is placed on the seat rail 9°9, which is raised at the rear. The bottom of this fuel tank 17 is extended downward to form a main pipe 4.4 and a seat rail 9.9.
It's stuck in between.

On both the left and right sides of the extension part 18 of the fuel tank 17, relief parts 19 are formed at four locations on the front, rear, left and right sides to avoid interference with the main pipe 4.4 and the seat rail 9.9. The upper surface 19a of this relief part 19 is
The main pipes 4, 4 and the seat rails 9, 9 are inclined upwardly and upwardly, respectively.

Further, an elastic body 20 made of rubber is attached to the outer peripheral surfaces of the main pipes 4, 4 and the seat rail 9.9, facing the relief portion 19. This elastic body 20 is located between the main pipe 4.4 and the seat rail 9.
When the extension part 18 is inserted from above, the escape part 1
9, and is pressed against the upper surface 19a of the relief portion 19 and the side surface 19b continuous to the upper surface 19a. Therefore, by this pressure contact, the position of the fuel tank 17 in the left and right and downward directions is restricted, and the elastic body 2
0 and the upper surface 19a of the extension part 19 is inclined upwardly and backwardly along the main pipe 4.4 and the seat rail 9.9, thereby preventing displacement of the fuel tank 17 in the front-rear direction. The position in the front-rear direction is also controlled at the same time.

On the other hand, the bracket piece 8 to which the seat rail 9 is connected
．． 8 forms an opposing wall 22 that extends upward and faces the side surface of the fuel tank 17. Between this opposing wall 22 and the side surface of the fuel tank 17, there is a space between the front and rear elastic bodies 20. A pressing body 23 is interposed to sandwich and fix the tank 17 from both left and right sides. The pressing body 23 of this example has a rubber damper 25 fitted inside a tank receiver 24 having a cylindrical shape with a bottom.
A nut 26 is buried in the center of the fuel tank 11, and the bottom surface 24a of the tank holder 24 is in contact with the side surface of the fuel tank 11. This pressing body 23 is supported by the opposing wall 22 by inserting a bolt 28 as a screw member from the side into a screw hole 27 provided in the opposing wall 22, and screwing the inserted end of the bolt 28 into a nut 26. The rubber damper 25 is compressed between the opposing wall 22 and the bottom surface 24a of the tank. Therefore, the bottom surface 24a of the tank receiver 24 is pressed against the side surface of the fuel tank 17 by the elastic return force of the rubber damper 25.

The outer peripheries of the fuel tank 17 and the air cleaner 1G are covered with a tank cover 30 made of synthetic resin and shaped like the original fuel tank.

According to such a configuration, the positioning of the fuel tank 17 is achieved by pressure contact with the elastic bodies 20 provided at four locations on the front, rear, right and left sides, and the positioning and fixing of the fuel tank 17 is achieved by pressing both left and right sides of the fuel tank 17. Therefore, the number of brackets for receiving the fuel tank 17 can be reduced compared to the conventional case. Therefore, the configurations of the frame 1 and the fuel tank 17 can be simplified accordingly, and cost and weight can be reduced.

Also, the fuel tank 17 can be removed by loosening the bolt 28 and pressing the pressing body 2.
The main pipe 4.4 and the seat rails 9, 9 can be handled by simply releasing the fixation of 3, and in this case, the bolts 28 do not go deep into the frame 1. Since it faces the side of the fuel tank 17, the bolt 28 can be loosened and tightened easily, and the workability of attaching and detaching the fuel tank 17 is improved.

In addition, in the above-mentioned embodiment, the seat rail is bolted to the main pipe, but the present invention is not limited to this, and may be fixed integrally by welding.

Furthermore, the fuel tank fixing device according to the present invention is not limited to use in a motorcycle, but may be applied to a tricycle having two rear wheels.

〔Effect of the invention〕

According to the present invention described in detail above, the fuel tank is positioned and fixed between the frame members by the upper clamping pressure, so that the number of brackets for receiving the fuel tank can be reduced compared to the conventional art. Therefore, the structure around the frame, including the fuel tank, can be simplified accordingly, making it possible to reduce costs and weight.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the fixed part of the fuel tank, FIG. 2 is a cross-sectional view taken along the line ■-U in FIG. 1, and FIG. 4 is a sectional view taken along line IV-rV in FIG. 1, and FIG. 5 is a side view of the motorcycle. 4.9... Frame member (main pipe, seat rail), 17... Fuel tank, 18... Extension part, 19
... relief part, 20 ... elastic body, 23 ... pressing body,
29...Screw member (bolt).

Claims (1)

[Scope of Claims] A motorcycle in which a pair of left and right frame members that extend diagonally upward as the vehicle advances forward are connected to another frame member that extends diagonally upward rearward, and a fuel tank is installed spanning between these two frame members. In such vehicles, the bottom part of the fuel tank is extended between the frame members, and a relief part is formed on the side surface of this extension part to avoid the frame member and is recessed inward, and the relief part and the above-mentioned upwardly rising front part are formed. An elastic body is interposed in a compressed state between the frame member that has been raised and the other frame member that has been raised at the rear, and the frame member is provided with a side surface of the fuel tank that is located between the front and rear elastic bodies. A fixing device for a fuel tank in a vehicle such as a motorcycle, characterized in that a pressing body is provided which is inserted and held from both left and right sides, and the pressing body is removably tightened and fixed to a frame member via a screw member.