JPH085419B2 - Fuel cock mounting structure for motorcycles - Google Patents

Description

The present invention relates to a mounting structure for a fuel cock provided in a fuel tank of a motorcycle, and more particularly to a main pillar that constitutes a vehicle body frame and a seat support that extends rearward from the main pillar. A fuel tank is provided on a joint portion of a frame.

[Conventional technology, problems to be solved]

In recent years, a pair of left and right main columns that extend obliquely downward from the steering shaft tube and support the rear part of the engine are largely bulged left and right from immediately after the steering shaft tube to increase the rigidity of the vehicle body frame. In this type, the fuel tank is mounted on the main pillar. Therefore, in order to improve the operability of the fuel cock, the mounting space for the fuel cock, which is usually mounted on the outermost lower surface of the fuel tank, is eliminated. If this is unavoidable, the fuel cock must be placed inside the vehicle body frame, and the existence of the fuel cock and the operating position of the operating knob are difficult to see, that is, the visibility is poor. There is a problem that it is easy to forget or make a mistake.

[Outline of Object and Structure of Invention]

An object of the present invention is to provide a fuel cock mounting structure that does not have the above-mentioned problems. It consists of a pair of left and right metal pipes that extend to the rear of the vehicle, and the metal pipe that forms the main pillar is connected to a seat support frame that extends obliquely upward to the rear to form a valley in this connection part, and to the body frame. By forming one of the left and right sides of the bottom portion of the mounted fuel tank so as to cross the valley portion in the front-rear direction when viewed from the side of the vehicle body, the fuel is provided between the bottom portion of the fuel tank and the bottom portion of the valley portion. A cock housing space is formed, and a fuel cock is provided in the fuel cock housing space. The operation knob is configured to be rotatable about an axis in the vehicle width direction. Is arranged so as to be substantially flush with the imaginary line connecting the outer edge in the vehicle width direction of the bottom portion of the valley portion and the outer edge in the vehicle width direction of the fuel tank located thereabove in the vehicle longitudinal direction. The point is characteristic.

〔Example〕

Hereinafter, the present invention will be described with reference to the illustrated embodiments.
Reference numeral 1 denotes a motorcycle, which supports a front wheel 4 in front of a body frame 2 via a front fork 3 so as to be able to turn left and right, and a rear arm 5 for supporting a rear wheel 6 in a vertically swingable manner. A power unit 7 including an engine and a transmission is provided below the vehicle body frame 2, and a fuel tank 8 is provided above the vehicle body frame 2. The front portion of the vehicle body frame 2 is covered with a fairing ring 9. A passenger seat 10 is provided at the rear of the fuel tank 8.

The body frame 2 is a main pillar 2b made of a metal pipe such as a pair of left and right steel pipes or aluminum pipes extending obliquely downward from the steering shaft pipe 2a and supporting the rear part of the engine 7.
And a down tube 2c extending downwardly therefrom and supporting the front part of the power unit 7. A seat support frame 2d extends rearward and obliquely upward from the main pillar 2b, and is welded to the upper surface of the metal tube forming the main pillar 2b. The fuel tank 8 is formed with a concave portion 8a which is recessed upward so that the bottom portion in the vicinity of the valley 2e where the main pillar 2b and the seat support frame 2d are welded crosses the valley 2e back and forth in the vehicle body side view. ing. G indicates a welded portion.

Reference numeral 12 denotes a fuel cock, which is located in a fuel cock housing space 14 formed between the bottom of the valley 2e and the recess 8a and is fixed to the lower surface of the fuel tank 8. That is, the fuel cock 12
The filter portion 13 projecting from the fuel inlet is inserted and fixed in the fuel tank 8 through the through hole 8b formed in the lower surface of the fuel tank 8. Reference numeral 8c denotes a fuel reservoir provided in the fuel tank 8 so that the last one drop of fuel can be used. Reference numeral 16 denotes an operation knob of the fuel cock 12, which opens and closes a fuel passage 20 connecting the fuel cock and the carburetor 18, and is provided facing the vehicle body side so as to be directly operated from outside the vehicle body.

Further, the operation knob 16 is configured to be rotatable about an axis extending in the vehicle width direction, and a grip portion 16a thereof has the valley portion 2e of the vehicle body frame 2 as shown in FIG.
Is positioned so as to be substantially flush with the imaginary line connecting the vehicle width direction outer edge A of the bottom portion of the vehicle and the vehicle width direction outer edge B of the fuel tank 8 located above this. There is.

Therefore, when the fuel cock 12 operates the operation knob 16 to the upper and lower positions as shown by the solid line in FIG. 2, the fuel is sent from the fuel tank 8 to the carburetor 18 by gravity. When the vehicle is not in use, the fuel is stopped by operating to the sideways position shown by the phantom line, and is not evaporated unnecessarily by the carburetor or the like.

〔The invention's effect〕

As described above, the main pillar of the vehicle body frame that supports the rear part of the engine is configured by a pair of left and right metal tubes that swell left and right from the steering shaft tube and extend rearward and obliquely downward to the rear part of the engine. A seat supporting frame extending obliquely upward to the rear is connected to the metal pipe forming the main pillar to form a valley portion at this connecting portion, and either one of the left and right sides of the bottom portion of the fuel tank mounted on the body frame is formed. Side is formed so as to cross the valley in the front-rear direction when viewed from the side of the vehicle body, a fuel cock accommodation space is formed between the bottom of the fuel tank and the bottom of the valley. The operation knob is provided with a fuel cock configured to be rotatable about an axis in the vehicle width direction, and a grip portion of the operation knob is an outer edge in a vehicle width direction of a portion that is a bottom of a trough portion in the vehicle body frame. ,this Since the fuel cock 12 is arranged so as to be substantially flush with the virtual line connecting the outer edge of the fuel tank located in the vehicle width direction, the fuel cock 12 is a metal pipe that constitutes the vehicle body frame. Since the lower surface is covered with the operation knob 16 and the operation knob 16 is arranged facing outward, visibility is good, forgetting the valve opening operation and running out of fuel while running, conversely closing the valve This has the effects of reducing forgetting operations such as consuming fuel unnecessarily and consuming mistakes, and reducing erroneous operations, and of not impairing the appearance.

Also, in a motorcycle in which the component mounting space is narrow, a wide fuel cock accommodation space can be obtained by skillfully utilizing the shape change portion (valley portion) of the vehicle body frame. A wide space for extending out can be secured and operability is enhanced. further,
Since the operation knob of the fuel cock rotates about the axis in the vehicle width direction, the turning position of the operation knob can be confirmed at a glance from the side of the vehicle body, and operability can be improved from this point as well.

In addition, the operation knob does not excessively project to the side of the vehicle body, and it is difficult for the occupant's legs to touch the operation knob. Moreover, since the operation knob is located on the outer side portion of the vehicle body, it can be easily operated even by the occupant while driving.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a motorcycle, Fig. 2 is an enlarged side view of a main part of the motorcycle, and Fig. 3 is a sectional view taken along the line III-III. 2 ... Body frame, 2b ... Main pillar, 2e ... Tanibe, 8 ...
Fuel tank, 8a ... recess, 12 ... fuel cock, 14 ... space, 16 ... operation knob.

Claims (3)

[Claims] 1. A main pillar of a vehicle body frame for supporting a rear portion of an engine is composed of a pair of left and right metal pipes which bulge left and right from a steering shaft tube and extend rearward and obliquely downward to the rear portion of the engine. A seat support frame that extends rearward and diagonally upward is connected to the metal tube that forms the above, and a valley portion is formed in this connection portion, and one of the left and right sides of the bottom of the fuel tank mounted on the body frame is connected to the vehicle body. By forming the valley portion so as to traverse the valley portion in a side view, a fuel cock accommodation space is formed between the bottom portion of the fuel tank and the bottom of the valley portion, and an operation is performed in the fuel cock accommodation space. A knob is provided with a fuel cock configured to be rotatable around an axis line in the vehicle width direction, and a knob portion of the operation knob is provided with a vehicle width direction outer edge of a portion which becomes a bottom of a valley portion in the vehicle body frame,
A fuel cock mounting structure for a motorcycle, wherein the fuel cock mounting structure is arranged so as to be substantially flush with a virtual line connecting an outer edge of a fuel tank located above the vehicle width direction in a vehicle longitudinal direction. 2. The fuel cock mounting structure for a motorcycle according to claim 1, wherein the body frame is made of a pipe material having a quadrangular cross section. 3. The fuel cock mounting structure for a motorcycle according to claim 1, wherein the body frame is made of an aluminum material having a quadrangular cross section.