JPS6044190B2 - Body frame with liquid tank for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle body frame with a liquid tank, in which a liquid tank such as an oil tank is formed in a part of a motorcycle.

A body frame for a motorcycle whose main part is made of a pipe member is already known in which the pipe member is used to construct a liquid tank such as an oil tank. When running, there is considerable vertical vibration, left-right tilting, front-back tilting, etc., so the liquid outlet of the liquid tank may be exposed above the liquid level due to undulations of the stored liquid, and air may become trapped in the liquid outlet pipe. be. Therefore, the main object of the present invention is to provide a body frame with a liquid tank for a motorcycle, which has a simple structure and is capable of securing a necessary and sufficient capacity for liquid while preventing the above-mentioned air entrapment. That is.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
In this embodiment, the present invention is applied to a cradle type vehicle body frame, and the front end of a main pipe 2 is welded to a head pipe 1 through which a steering shaft (not shown) is inserted.
The welded portion is reinforced by the stay 3. The main pipe 2 extends rearward substantially horizontally, and the front end of the back frame 4 is welded to the rear end. A cassette 5 is liquid-tightly welded onto the main pipe 2 along its longitudinal direction, and the front end of the cassette 5 is welded to the head pipe 1 and the stay 3. The main pipe 2 and the cassette 5 work together to constitute an oil tank To of the motorcycle.

That is, a first liquid-tight storage chamber a is formed between the main pipe 2 and the cassette 5, and the opening rear end of the main pipe 2 is sealed with a stopper 6, so that a liquid-tight first storage chamber a is formed in the main pipe 2. Two storage chambers are formed. Front and rear small holes 7 and 8 are bored in the front and back of the upper surface of the main pipe 2 located inside the cassette 5, and the first and second storage chambers a and b communicate with each other through these small holes 7 and 8. be done. cassette 5
An oil inlet 9 that is closed by an oil cap 10 is opened in the upper wall, and oil can be injected into the oil tank TO, that is, the first and second storage chambers A and b through this oil inlet 9. can.

Further, an oil level measuring vibrator 11 is inserted and fixed into the rear part of the cassette 5 from the upper surface thereof, and a plurality of holes 12 are bored in the insertion part of the vibrator 11 into the cassette 5. This vibrator 11 and the inside of the oil tank TO are communicated with each other.

An oil level switch (not shown) is provided inside the oil level measuring vibrator 11, and the open end of the vibrator 11 is closed by a lid 13. Furthermore, oil tank T
A liquid outlet 14 to which a liquid outlet pipe 15 is connected is opened at the rear lower surface of the main vibe 2 constituting the main vibe 2, and the liquid outlet pipe 15 is communicated with a liquid pump or the like (not shown). The upper end of a down tube 16 is welded to the stay 3, which is welded to the connecting portion between the front ends of the head vibe 1 and the main vibe 2. It extends rearward toward , and its rear end is welded to the lower end of a pillar 17, which will be described later.

The upper ends of pillars 17 are welded to the front end of the back frame 4, and the pillars 17 extend downward, and their lower ends are slightly curved forward and welded to the rear end of the down tube 16.

The rear part of the back frame 4 and the middle part of the pillar 17 are connected by a back stay 18.

In the above embodiment, the oil tank TO may of course be a fuel tank or other liquid tank.
Further, the number of the small holes 7, 8 may be one, or three or more, and the positions thereof need not be in the front or rear. As described above, according to the present invention, the main vibe 2 connected to the head vibe 1 and the cassette 5 fixed on the main vibe 2 constitute the liquid tank of the oil tank T. comprises a first storage chamber a formed by the main vibrator 2 and the cassette 5, and a second storage chamber b formed inside the main vibrator 2, and both chambers A and b are bored into the main vibrator 2. They communicate with each other through the front and rear small holes 7 and 8, and the liquid outlet 14 is opened on the lower surface of the main vibrator 2, so that the liquid tank can move violently back and forth, left and right, while ensuring sufficient capacity as a liquid tank. Or, even if it swings up and down, the liquid inside the main vibrator 2 will hardly ripple due to the viscous resistance of the liquid such as oil passing through the front and rear small holes 7 and 8. The liquid outlet 14 opened in the vibrator 2 is not exposed above the liquid surface, and there is no fear that air will be trapped in the liquid discharged from the outlet 14.

[Brief explanation of the drawing]

FIG. 1 is a side view of the vehicle body frame of the present invention, FIG. 2 is an exploded perspective view of a portion thereof, and FIG. 3 is a longitudinal sectional view taken along the line 2--2 in FIG. A, b... 1st, 2nd containment room, TO...
・Oil tank, 1...Head vibe, 2...
...Main vibe, 5...Cassette, 7,8
...Front and rear small holes, 14...Liquid outlet.

Claims (1)

[Claims] 1 A main pipe 2 connected to the head pipe 1 and a gusset 5 fixed on the main pipe 2 constitute a liquid tank such as an oil tank To. and a second storage chamber b formed in the main pipe 2, and both chambers a and b are connected to the main pipe 2.
A liquid tank body frame for a motorcycle, which communicates with each other through small holes 7 and 8 bored in the main pipe 2, and further has a liquid outlet 14 opened on the lower surface of the main pipe 2.