JPS6036985B2 - Motorcycle body frame with liquid tank - 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 composed of a pipe part, in which a liquid tank such as an oil tank is constructed using the pipe part, is already known. Since a liquid tank is constructed by welding together steel plates or steel pipes, scale and dust generated during welding may enter and remain in the liquid tank, and this may remain even after cleaning the liquid tank. When pouring liquid into a liquid tank, dust and the like may enter the liquid tank along with the liquid. Therefore, the present invention concentrates and accumulates dust, scale, etc. that have entered the liquid tank at a distant position by the liquid outlet, prevents it from flowing into the outlet, and reduces the function of the filter provided at the outlet. or from flowing out through the liquid outlet to the liquid supply side.
The main purpose of this invention is to provide a motorcycle body frame with a liquid tank that has a simple configuration.

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, and the welded portion is attached to a stay 3. reinforced by The main pipe 2 is inclined downward and extends rearward, and the front end of the back frame 4 is welded to the rear end. A gusset 5 is liquid-tightly installed on the main pipe 2 along its longitudinal direction, and the front end of the gusset 5 is welded to the head/spipe and the stay 3. The main pipe 2 works together with the gusset 5 to connect the motorcycle's oil tank To.
It consists of

That is, a liquid-tight first storage chamber a is formed between the main pipe 2 and the gusset 5, and the closed rear end of the main pipe 2, which slopes backward downward, is sealed with a stopper 6 and is contained inside the main pipe 2. A sealed second storage chamber b for liquid is formed. Front and rear passage holes 7 and 8 are bored at the front and rear of the upper surface of the main pipe 2 located within the gusset 5, and the first and second storage chambers a and b are opened through these lotus passage holes 7 and 8. They communicate with each other. An inlet 9 that is closed by the cap 1 is closed on the upper wall of the gusset 5, and through this inlet 9 the oil is supplied into the oil tank To, that is, the first and second storage chambers a.
, b can be injected with oil.

In addition, a bell measuring pipe 11 is inserted and fixed in the rear part of the gusset 5 so that the liquid level is higher than its upper surface, and a plurality of passages 12 are bored in the insertion portion of this pipe 11 into the gusset 5, and these passages □ Connect this pipe 11 and oil tank T through 12.
o has been communicated.

A liquid level unit 13 is provided within the liquid level measuring pipe 11 . The oil tank To is located in front of the bottom end of the main pipe 2 that slopes downward at the rear, that is, above the bottom end of the main pipe 2.
The outlet 14 for the oil stored in the
A filter 15 is inserted into the oil tank T4, and the filter 15 passes through the rear transport passage □8 as shown in FIG.
It faces the inside of the first storage room a.

Further, the lower end of the filter 5 is connected via a joint 19 to an outlet pipe P connected to an oil pump or the like. Behind the outlet 14 of the main pipe 2, that is, below,
A foreign matter retention section S is formed in which fruit such as dust and scale that has entered the oil tank To is retained.

The upper end of the down tube 16 is attached to the stay 3 which is welded to the connecting portion between the head/guip and the front end of the main pipe 2, and the down tube 16 is bent into a substantially L shape when viewed from the side. , extends downward and rearward, and its rear end is lacquered to the lower end of the 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 bent slightly 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.

Incidentally, in the above embodiment, it goes without saying that the oil tank To may be a fuel tank or other liquid tank.
Incidentally, scale and dust generated during welding and joining, or dust mixed into the oil tank To when oil is injected from the inlet 9, enter into the oil tank To, as shown in Fig. 3. This minimizes as much as possible the foreign matter that accumulates in the lowest end of the oil tank To, that is, the foreign matter retention section S formed in the main pipe 2 that slopes downward and extends rearward, and reaches the vicinity of the oil outlet 14. , they will not cause clogging or the like in the filter 5 and reduce its function, nor will they pass through the filter 5 and flow out into the extraction pipe P.

As described above, according to the present invention, the main pipe configured to form part of the vehicle body frame and at least part of the liquid tank is inclined in the vertical direction, and the liquid is An outlet for the liquid stored in the tank is opened, and a foreign matter accumulation area such as dust is formed in the main pipe below the outlet, and foreign matter such as dust and scale that has entered the liquid tank is removed. This can cause the foreign matter to remain at the lowest position of the liquid tank, which may cause functional deterioration due to clogging of the filter provided at the liquid outlet, or cause the foreign matter to pass through the filter and cause the liquid to flow to the outlet. There is no leakage to the supply side.

Incidentally, as shown in the above embodiment, the liquid tank is composed of a first storage chamber defined by a main pipe and a gusset, and a second storage chamber formed inside the main pipe, and If a foreign matter retention portion is formed in the liquid tank, even if the liquid tank swings or vibrates, it will be less likely that the retained foreign matter will get stuck, and the above-mentioned effects will be more pronounced.

[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 vertical sectional view taken along the line mm in FIG. 2. S...Foreign matter retention section, To...Oil tank, 2...
・Main pipe, 14...Oil outlet. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A main pipe configured to form part of a vehicle body frame and to form at least a part of a liquid tank is inclined in the vertical direction, and the liquid tank is arranged above the lowest end position of the main pipe. An outlet for the liquid inside is opened, and a part where foreign matter such as dust accumulates is formed in the main pipe below the outlet. Motorcycle body frame with liquid tank.