JPS597719A - Arrangement construction of oil pipe in autobicycle or the like - Google Patents

Abstract

PURPOSE:To protect a pipe and obtain its cooling characteristic, by arranging the return pipe, which returns oil from an internal-combustion engine to a main frame being an essential part of an oil tank, before the internal-combustion engine and between a down tube and the engine. CONSTITUTION:Oil from a down tube 4 being one part of an oil tank 22 is supplied to each lubricated part of an engine by a feed oil pump 28 in an oil pan 27. While return oil from a return oil pump 29 is returned via a return communication pipe 30 communicated to a main pipe 3 being an essential part of the oil tank 22 from the front wall of a case 19a of an engine 19 through joints 31, 32, and the oil is circulated via a joint pipe 10 and the down tube 4. This communication pipe 30, being arranged before the engine 19, obtains a cooling effect of oil, and the pipe 30, being arranged between the down tube and the engine, can be protected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil tank piping structure in which a main frame, a down tube, and a tension pipe constituting a frame are communicated with each other.

In a motorcycle, an oil tank has been proposed in which oil is stored and circulated in a long and capacious space obtained by communicating and connecting frames.

In such an oil tank, it is possible to obtain a tank with a large capacity by using a frame, it is extremely advantageous in terms of space utilization and member utilization, and oil can be cooled by circulating the oil in a long passage. There are other advantages.

The present invention has been made to improve the oil tank device as described above, and an oil return pipe that connects the internal combustion engine and the main frame, which is the main part of the oil tank, is arranged in front of the internal combustion engine to utilize the running wind. To provide a piping structure for a motorcycle in which oil on the return side is cooled as shown in FIG. 9, and a return piping is arranged between the down tubes in front of an internal combustion engine, and the piping is protected while achieving the above. .

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1. Figure 1 is a side view of the frame of the motorcycle, Figure 2 is a cutaway perspective view of the same main part, Figure 3 is a front view of the same, and Figure 3 is a front view of the frame. Figure 4 is a cutaway perspective drawing of the same essential parts, in which the frame 1 consists of one main pipe 3, which forms the backbone, extending rearward and downward from the middle or upper part of the rear surface of the head tube 2, and Provide one down tube 4 hanging downward. The left and right down tube lowers 5 are provided and extend rearward from the lower end of the down tube 4.
．． Further, left and right center vibrators 6 extend upward from the rear ends of the lowers 5, 5, and the upper ends of these are joined to both rear ends of the main pipe 3.

The left and right upper pipes 7.7 extend rearward from the top of the center vibro, 6, and the center vibro.

The lower part of the upper pipe 1.1 is connected to the middle part or the rear part of the upper pipe 1.1 by subtubes 8, 8, and a cross member 9 is interposed between the middle part or the rear part of the upper pipe 7. The rear lower part of the main pipe 3 and the middle upper part of the down tube 4 are connected by one tension pipe 10.

Above head tube 2 has upper and lower bridges 11°11
A front fork 13 supporting the front wheels 12 is supported in a freely steerable manner, while a bracket 14 is provided at the bottom of the center vibro 6 to pivot the front end of a rear fork 16 supporting the 15 rear wheels. A fuel tank 17 is provided on the main pipe 3, and a seat 18 is provided on the upper pipe 7.

The engine 19 is mounted in a space surrounded by the down tube 4, main pipe 3, lower 5, and center vibro.
It consists of a cylinder head 19c on top of the barrel, a cylinder head cover 19d on top of this, etc. In the figure, 20 is a carburetor, 21
indicates an air cleaner.

In the above, the spaces 3a and 4a within the main pipe 3, down tube 4, and tension pipe 10.

10a are communicated with each other to form an oil tank 22, the rear end of the main pipe 3 is closed with a tail plug 23, and the front end is closed with the rear upper end of the herad tube 2 and the upper rear surface of the down tube 4. The rear part of the main pipe 3 is in communication 10b with the rear part of the tension pipe 10, and the tension pipe 10 is tilted forward and downward to communicate with the middle upper part of the down tube 4, and the upper part of the communication part 10c of the down tube 4 is Plug body 2
The oil tank 22 is closed at 4 and 51 is oil-tight.

The bottom 4bK of the down tube 4 is connected to one end of the supply pipe 25, and the middle or rear part of the down tube 4 is connected to the front wall of the booth 19a of the engine 19 through a joint 26 to supply oil provided at the inner bottom of the case. A supply oil pump 28 provided inside the oil pan 27 and facing inside the pan 2T supplies oil to each lubricating part of the engine.

On the other hand, inside the oil pan 27 is a return oil pump 29.
and connect it to the upstream end of the return delivery pipe 30,
The pipe 30 is led out from the front wall of the case 19a to the front of the engine 19 through a joint 31, and is extended upward so that the downstream portion 30a connects the front bottom wall 3b of the main pipe 3 vertically through a joint 32. The downstream end 30b opens above the space 3a. As a result, the oil in the oil pan 27 that has been lubricated by the drive of the pump 29 is returned to the main pipe 3 that forms the main part of the oil tank 22 by valve the pipe 30, and the oil is passed from the main pipe 3 to the joint pipe 10. The lubricant then flows into the down tube 4 and is supplied to various lubricating parts via the communication pipe 25 and oil pump 28, and the above steps are repeated to form a circulation system.

The intermediate portion 30c of the above return delivery pipe 30 is connected to the engine 1.
Passes vertically in front of 9, and is therefore exposed to the wind when driving.
The oil passing inside the long communication pipe 30 is effectively cooled, and a large oil cooling effect is obtained.The cooled oil is returned to the tank 22, and the tank 22 is long. The passageway provides additional cooling, resulting in excellent oil cooling overall.

The communication pipe 30 is disposed along between the down tube 4 and the front of the engine 19 as clearly shown in FIGS. 2 and 3, so that the communication pipe 30 can be protected, and each communication pipe 30. Connection joint part 26.31tj with case 19a of 25 Front part 5a of one down tube lower 5
It faces the back, so this part can be effectively protected.

By the way, an oil filler port 33 is protruded in a cylindrical shape from the front earthen wall of the main pipe 3, and a hole 33a is formed on the inner diameter of the oil filler port 33, and a male hole 36c is formed on the lower outer periphery of the mouth 33. A cap collar 34 is fitted, and an oil cap 36 with a level gauge 35 hanging thereon is screwed onto the cap collar 34. A radially communicating joint 34a is provided in a part of the collar 34, and the oil cap is fitted to fit the oil cap 36. A groove 36a and a through hole 36bv communicating with the groove 36a are provided on the outer periphery of the fitting part 36, allowing communication between the outside air and the inside of the tank 22, and connecting the joint part 34a.
One end of the breather tube 31 is connected to the cylinder, and the other end of the tube is exposed to the engine cylinder inside the rad cover 19d, and the breather tube 31 acts as a breather and collects the oil that leaks through it. This is a tube that connects the room and the air cleaner.

In the above embodiments, a motorcycle was shown, but the present invention can also be applied to a three-wheeled motorcycle or the like that adopts a similar frame structure.

As is clear from the above, according to the present invention, the lubricated oil returned to the main frame from the engine is cooled by passing through the pipes arranged in front of the engine, which is advantageous in terms of oil cooling performance. , -\Rad tube has many advantages such as being advantageous in terms of protecting the piping.

[Brief explanation of the drawing]

Fig. 1 is a side view of the frame, Fig. 2 is an explanatory perspective view of the same with main parts cut away, Fig. 3 is a front view of the same, Fig. 4 is an enlarged side view of the main parts of the frame with a cutaway, and Fig. 5 6 is a perspective view of the oil cap collar, and FIG. 7 is an external view of the oil cap. In the drawing, 2 is the herad tube, 3 is the main frame, and 4
is the down tube, 10 is the tension valve (-8 = Eve, 22 is the oil task, 25 is the supply pipe, 30 is the return pipe, and 19 is the internal combustion engine. Patent applicant Honda Motor Co., Ltd.

Claims (2)

[Claims] (1) The main frame extending rearward from the herad tube, the down tube hanging downward, and the inside of the tension pipe connecting the main frame and down tube are communicated, and the oil tank is installed inside these in an oil-tight state. The downtube is configured to supply oil to the internal combustion engine from below the down tube (connected by piping), and a return piping for returning oil from the internal combustion engine to the main frame is arranged in front of the internal combustion engine. Characteristic oil piping structure for motorcycles, etc. (2) The oil piping structure for a motorcycle or the like according to claim 1, wherein the return piping is disposed between an internal combustion engine and a down tube.