JPS5989280A - Breezer pipe for tank - 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 The present invention relates to a fuel tank device for a white J motorcycle.

In order to increase the fuel tank capacity, some types of motorcycles are equipped with a sub tank in addition to the normally placed tank (hereinafter referred to as the main tank).

However, with the above sub-tank equipment, two types of piping are required for the main tank and the sub-tank. In other words, a communication vibrator was required to supply fuel from the main tank to the sub-tank, a breather pipe and force were needed to bleed air from the sub-tank, and the piping system was complicated. In particular, when it comes to the breather pipe of a sub-tank, it is necessary to communicate the upper part of the sub-tank with the vicinity of the fuel filler port of the main tank. This was done by running piping around the tank. Therefore, the piping system was complicated and caused an increase in costs.

In addition, as mentioned above, the communication vibe and breather pipe from the main tank are placed on the top of the sub tank,
The fuel supply pipe that supplies fuel to the carburetor brake side and the fuel cock that shuts off the supply as appropriate are all located in the same sub-tank, making the sub-tank's piping system extremely complicated.

The five forces are the workability of piping installation, the shape of its installation, etc.
It was complicated in terms of ρ quality control such as checking the condition and airtightness.

Since each of the piping systems Cat is roughly exposed, it is necessary to consider the appearance.

The present invention relates to an improvement of a fuel tank device devised in view of the above points, and its purpose is to simplify the piping system in a fuel tank device equipped with a main tank and a sub-tank, and to improve manufacturability. The object of the present invention is to provide a fuel tank device with good quality and easy quality control.

An embodiment of the present invention not shown in FIGS. 1 to 9 will be described below.

1 is a frame body of a motorcycle.The frame body 1 has a head vibe 2 with a solid front end and a main vibe 3 extending rearward, and a bent part of the main vibe 3 has a hard Mzan. From the seat rail 4 that extends to the rear of the vehicle body, the down tube 5 that extends downward from the front part of the main vibe 3 and then extends to the rear of the vehicle body at a bend, and the backstay 6 that supports the seat rail 4. It has become. The main tank 7 is installed astride a pair of upper main vibes 3a and a pair of lower frames 3b, which are arranged symmetrically with respect to the N wheel. It is broken down as shown below. That is, the main tank 7 is provided at its rear end with a shaft support 8 that rotatably supports the tank 7, and the coaxial support 8 is secured to a bearing 9 attached to the frame body 1. The bottle 10 is integrally inserted into the coaxial support 8 and the bearing 9, and a retaining ring 11 prevents the bottle 10 from being removed.

A hinge mechanism is constituted by the shaft support 8\bearing 9 and pin 10, and the main tank 7 is rotatably attached to the frame body IK.

Further, at the front of the main tank 7, a pair of stays 12 protrudes forward from both sides and forms a solid layer.
A bearing 14 is fitted into the engagement hole 12a formed in the frame body 1 through a cushion 13, a bolt 36 is inserted into the bearing 14, and the bolt 36 is screwed onto the frame body 1 and tightened.

Also, between the main vibe 3 and the backstay 6, there is a G support plate 1.
5 is bridged and is hardened into one piece, and the support plate 15V
The sub-tank 16 is placed and fixed, and the upper part of the sub-tank 16 is fixed to the seat rail 4.

Thus, the sub-tank 16 is placed within an inverted triangular space surrounded by the main vibe 3, seat rail 4, and backstay 6.

Further, as shown in FIGS. 3 to 5, the main tank 7 has a fuel injection lower a formed at its top, and the bottom plate 7b of the main tank 7 has a sub-tank breather vibe 17E attached at its rear. A breather vibe mounting portion 7C is formed to be inclined rearward at a predetermined angle with respect to the vehicle horizontal line in order to support the breather vibrator 17, and a support portion 7d is formed behind the mounting portion 7C to support the breather vibe 17. Then, a breather vibe mounting hole is drilled at right angles to the above-mentioned breather vibe mounting % 7c VC, a breather pipe 17 bent into an L-shape is inserted into the mounting hole, and the breather vibe 17 is further reinforced with a plate 18. At the same time, turning plate 1
8- Breather vibe installation W7c and breather pipe 1
Each contact portion 7 is liquid-tightly joined by brazing. The breather pipe 17 is fixed to the support portion 7C by a presser foot 19 slightly behind the bent portion. Therefore, the straight pipe portion of the breather pipe 17 is aligned with the vertical line of the vehicle body.
The opening key is installed tilted backward at a predetermined angle θ with respect to
It's getting dark.

At the back of the bottom plate 7b of the main tank 7, a communication vibe 20 for supplying fuel to the sub-tank 16 is fixed in a liquid-tight manner near the breather pipe attachment W7C.
The communication vibrator 20 is bent rearward into a shape FfjJ.

As roughly illustrated in Figures 6 to 9,
The sub-tank 16 consists of two press-molded outer wall plates 21 and two inner wall plates 22, which are welded together at the outer periphery of their mating surfaces! 2. Therefore, the sub-tank 16 is formed into a substantially inverted ladder shape so as to fit into the inverted triangular space surrounded by the main vibrator 3, seat rail 4, and backstay 6, and expands outward from the outer wall board 21. The extended balloon part 21 is arranged to fit within the above-mentioned inverted triangular space. Further, the bottom of the bulge 21a is formed with a flat and smooth portion 21b2, and the bottom of the bulge 21a is flat and has a smooth portion 21b2.
14. The mounting plate 23 is fixed. The sub-tank 16 is firmly fixed to the support plate 15 installed between the main pipe 3 and the backstay 6 by the mounting plate n.

In general, the outer wall plate 21K has the fuel cock mounting seat 24 stuck to it, and the fuel intake pipe portion is disconnected from the mounting seat 24. A strainer 26 is attached to the tip of the fuel suction pipe 25, and power is disconnected so that the strainer 26 is close to the bottom of the tank.

- 10,000, a fuel supply pipe 27 connected to an oil pump (not shown) is also connected to the mounting seat 24K, and the fuel supply pipe 27 penetrates the outer wall plate 21 and protrudes from the inside of the tank to the outside. I'm here. The tip of this fuel supply pipe 27 [resin tube, etc. 7i] is connected to communicate the fuel pump and the sub-tank 16, and is connected to a carburetor (not shown).
When the engine is stopped for a long time, the VC is connected to the mounting seat 24. ') T: The fuel tank 28 is designed to cut off the communication between the fuel intake pipe section and the fuel supply pipe 27.

Also, the inner wall board 224; lj, and the main tack 7 on the top
A small diameter pipe 30 that communicates with the large diameter pipe 29 and the breather pipe 17 attached to the main tank 7 is in contact with the large diameter pipe 29 attached to the main tank 7. Ichigo. The pipe 29 and the pipe 30 are disposed inside the seat rail 4 as shown in the figure 61';4.

Roughly speaking, a drain plug mounting plate 31 is firmly fixed to the bottom of the inner wall plate 22C'i, and a drain plug 32 is removably screwed into the mounting plate 31.

The communication vibe 20 attached to the main tank 7 and the pipe tube 29 attached to the safety tank 16 are connected through the flexible tube 33K, and the main tank 7
The breather pipe 17 attached to the sub-tank 16 is attached to the sub-tank 16. The main tank 7 is connected to the sub-tank 16 through a flexible tube 34, and fuel is supplied from the main tank 7 to the sub-tank 16, and the work inside the sub-tank 16 is
Air is opened 2n in the main tank 7 so that the air inside the same tank can be vented. In addition, in the outer wall board 21, there is a "J" insertion hole 21 from the top of the previous issue.
A liquid level detection sensor (not shown) is inserted into the sensor insertion hole 21, and the sub tank 1
Fuel remaining in 6 t 73', inspection 811! IE is now available. A side cover 35 is attached to the frame body 1 so as to cover the sub tank 161.

Since the embodiments shown in FIGS. 1 to 9 are constructed as described above, when fuel is injected, the fuel supplied from the fuel injection lower color of the main tank 7 is transferred to the communicating pipe 2.
0\ Sub tank 1 from pipe 29 via tube 33
Fuel is supplied to the sub-tank 16 and the fuel is stored in the tank EFn, and at that time, the air pipe 3 in the sub-tank 16 is
0, it is opened into the main tank 7 via the tube 34 and the breather pipe 17. Since the breather pipe 17 is tilted backward at a predetermined angle θ with respect to the vehicle body lead M 70 ”, there is no force for fuel to enter the breather pipe 17 when fuel is injected.Moreover, the breather pipe 17 is located at the rear of the main tack 7 in close proximity to the upper wall surface of the main tank 7, so there is no risk of fuel scattered during fuel injection entering the breather pipe 17.

In the 'X embodiment as shown in 0), it is sufficient to simply arrange the straight pipe part of the L-shaped breather pipe 17 from the rear of the main tank 7 by tilting it backward by a predetermined angle θ with respect to the vertical line ■. There is no need to run a breather pipe from the rear of the main tank to the vicinity of the inlet, unlike conventional σ).
Piping work becomes easier and the manufacturing cost of the main tank can be reduced.

In addition, in non-embodiments, the outer W plate 2 of the sub-tank 16]
A fuel suction pipe 25, a fuel supply pipe 27, a fuel cock 28, etc. are attached to the inner wall plate 22, and pipes 29, 30, a drain plug 32, etc. are attached to the inner wall plate 22 in a liquid-tight manner. Therefore, with the fuel suction pipe 5, fuel supply pipe 27, etc. attached to the outer wall board 21, the outer wall board 21 itself can be checked from inside and outside, and the inner wall board 22 can also be checked in the same manner as the pipes 29, 30, etc. The inner wall board 22 alone can be checked in the attached state. In this way, the sub-tank 16 can be manufactured by integrating the outer wall plate 21 and inner wall plate 222, which have been checked individually, by welding, which makes quality control easy and extremely easy to manufacture. It is.

Since the installed vibrators 29, 30, etc. are not exposed, these various pipings are not damaged and the appearance is good.

Furthermore, in this first embodiment, the fuel in the sub-tank 16 and the main tank 7 can be discharged by the drain plug 32 attached to the bottom of the sub-tank 16.

In the non-embodiment, the rear end of the main tank 7 is rotatably supported and attached to the frame body 1, and the main tank 7 and the sub-tank 16 are connected to each other by a flexible tube 33.
．． 34, it is possible to inspect and maintain various parts located at the bottom of the tank without removing the main tank 7 from the frame body 1, resulting in extremely good workability.

Roughly speaking, in this embodiment, since the side cover 35 is attached to cover the sub tank 16, it is possible to protect the sub tank 16, and in particular, it is possible to protect the double cock 4 attached to the outer wall frame 21. .

As is clear from the above description of the first embodiment, in the present invention,
The main tank and the main tank are placed at the bottom of the rear of the main tank.
7: In a fuel tank device for a motorcycle equipped with a sub-tank, insert the straight pipe part of the breather vibe for the sub-tank from the rear bottom plate of the main tank, and tilt the straight pipe part backward at a predetermined angle with respect to the stopping straight line. The breather vibe can be effectively used as an air venting vibe for the sub-tank without allowing fuel to enter the breather vibe when fuel is injected.

[Brief explanation of the drawing]

No. 11 is a side view of a motorcycle equipped with a tank breather vibe according to the present invention, FIG. 2 is an enlarged side view of its main parts, FIG. 3 is an exploded perspective view thereof, and FIG. A cutaway side view of the main tank, No. 5 is a back view thereof, Fig. 6 is a vertical side view of the sub-tank and side cover in the same embodiment, Fig. 7 is a front view of the sub-tank in the same embodiment, Figure 9 is a plan view and a side view thereof. 1...Frame body, 2...Head vibe, 3.
... Main vibe, 4... Seat rail, 5... Down tube, 6... Back stay, 7... Main tank, 8... Shaft support, 9... Bearing, 1o... Bottle, 11... Retaining ring, 12... Stay, 13...
Geunyong, 14... Bearing, 15... Support plate, 16
... Subtank, 17... Breather Vibe, 18.
... Batch, 19... Presser foot, 20... Communication vibrator, 21... Outer wall plate, n... Inner wall plate, 23... Mounting plate, 24... Tsuyu plate cock mounting seat, 25... Fuel intake pipe, 26... Strainer, 27... Fuel supply pipe,
Prisoner... Tsuyuel cock, 29.3o... Vibrator, 3
1... Train plug mounting plate, 32... Drain plug, 33. 34... Tube, 35... Side cover, 36... Z torque. Agent Patent attorney Nozomi Ehara 01 people

Claims (1)

[Claims] In a fuel tank device for a motorcycle equipped with a main tank and a sub-tank arranged at the rear lower side of the main tank, insert the straight pipe part of the breather pipe for the sub-tank from the rear bottom plate of the main tank, and A tank breather pipe characterized by having a straight pipe section opened by tilting backward at a predetermined angle with respect to the vertical line.