JPH02274677A - Oil tank device for motorcycle - Google Patents

Abstract

PURPOSE:To prevent the mechanical loss of an oil pump and the generation of noise by providing a chamber tank for separating air from oil and an oil stopper in a main tube and forming an opening part communicated with the chamber tank wider than an opening part communicated with a bridge tube. CONSTITUTION:Oil, mixed with air, flowing toward the rear side of a body within a main tube 2 collides against an oil stopper 17A, and a part of the oil flows into a chamber tank 40. As the opening part 41 communicated with the chamber tank 40 is formed wider than an opening part 43 communicated with a bridge tube 4, the quantity of the oil mixed with air flowing into the chamber tank 40 becomes larger. While this oil remains in the chamber tank 40, the most part of the air is separated, the oil passes through the main tube 2 from the opening part 41, flows into the bridge tube 4 from the opening part 43, further into an oil tank 6, and after the air is completely separated, the oil is fed into an engine 11 through a down tube 3.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an oil tank device for a two-wheeled motor vehicle that uses a part of the frame as an oil tank. This invention relates to an oil tank device for two-wheeled vehicles that can be easily drained.

(Prior art) Conventionally, the curved part of the frame that is connected to the head pipe and spans the fuel tank is made of left and right pieces made of sheet metal that have been bulged into a predetermined shape. A frame for a two-wheeled motor vehicle that includes an oil tank is known (see Japanese Patent Publication No. 52-34292). The frame of this motorcycle has one of the external advantages of a pipe frame (
,The front part of the frame that straddles the fuel tank is configured as a tank to ensure sufficient tank space for passengers.
This is what I did. In addition, the automatic 2 which constitutes the liquid tank of the oil tank chopsticks by the main pipe connected to the head bye and the gusset fixed to this main vibe.
The frame of a wheeled wheel is known (Japanese Patent Application Laid-Open No. 58-3957
Publication No. 9). The frame of this two-wheeled motor vehicle prevents air from getting trapped in the oil outlet pipe by ensuring sufficient tank capacity.

However, in the motorcycle frame mentioned above, the oil introduced into the oil tank from the engine's oil pump contains a large amount of air, so the oil mixed with air is circulated back to the engine's oil pan. , engine lubrication problems could occur.

Therefore, a motorcycle oil tank device is designed to circulate F-containing oil introduced from the engine's oil pan through a long passage formed by the vibrator structure of the frame, and remove air contained in the oil during this period. Proposed.

Figure 4 shows the proposed oil tank device, in which a main tube 2 and a down tube 3 connected to a head pipe 1 are connected by a bridge tube 4, and are surrounded by the main tube 2, down tube 3, and bridge tube 4. The space is surrounded from the left and right by a pair of bulge-molded plate members 5, and the periphery thereof is welded to the head vibrator 1, main chuck 1-12, down tube 3, and bridge tube 4 to form a hollow oil tank 6. be done.

A body tube 7 is connected to the rear end of the main tube 2, and a seat rail 8 and a seat pillar 9 extend from the body tube 7 toward the rear of the vehicle body. Further, an undertube 10 is connected to the lower end of the down tube 3, and the end of the undertube 10 is connected to the body tip 7.
The engine 11 is mounted in a space surrounded by the body tube 7 and the underdue 710.

An oil pan (not shown) is provided at the bottom of the engine 11, and the oil accumulated in this oil pan is discharged from the engine 11 by an oil pump (not shown), flows upward through the oil introduction hose 1a, and then flows from the connection part 14 into the oil tank. The oil is introduced into the main tube 2 through an opening 16 formed in the main tube 2 through an oil guide hose 15 provided within the main tube 2 . The oil introduced into the main tube 2 flows toward the rear of the vehicle body through the oil passage formed in the main tube 2, hits the oil stopper 17 provided at the rear end of the main tube 2, and then enters the opening 1.
8 into the oil passage formed in the bridge tube 4. The oil that has entered the bridge tube 4 flows into the oil tank 6 through the opening 19, circulates within the oil tank 6, and flows into the oil passage formed in the down tube 3 through the openings 20, 21.

The oil introduced into the main tube 2 from the opening 16 is mixed with a large amount of air, but this is caused by the long oil passage formed by the main tube 2 and bridge duplex 4 and the oil pool in the oil tank 6. Part of the air is separated.

The oil from which the air has been separated flows downward in the down tube 3 and is supplied into the engine 11 through the oil passage joint 22 and the oil supply hose 23. Note that the symbol @24 indicates an oil intake port. Further, reference numeral 25 indicates a frontage portion through which air separated within the down tube 3 is handled to the oil tank 6 side.

(Problem to be Solved by the Invention) The oil level in the oil tank 6 varies significantly depending on the engine speed. For example, the symbol B in FIG. 4 indicates the oil level from the engine stop to the low speed range, and the symbol B indicates the oil level from the medium speed range to the high speed range.

When the oil level is A, sufficient oil storage capacity is secured in the main tube 2 and oil tank 6, so the oil mixed with air stays in the oil tank for a long time, and the air is separated sufficiently. After that, oil can be supplied to the engine 11.

However, in the state of oil level B, main tube 2
The use of the oil reservoir in the oil tank 6 and inside the oil tank 6 decreases, and the time that the oil with the air d2 stays in the oil reservoir becomes shorter, and the oil is supplied to the engine 11 without the air in the oil being sufficiently separated. be done. As a result, an impact is applied to the oil pump in the engine 11, causing frequent mechanical loss and U noise, and in the case of mass sales, there is a risk that the oil pump will break. In addition, the oil pressure will drop, and the oil) 8 degrees Celsius will cause more wear on various parts of the engine 11, and the oil viscosity will not be at the proper level, which may cause seizure of the engine 11. .

The present invention has been made in consideration of the above circumstances, and it is possible to sufficiently separate the air in the oil and supply it to the engine from the low rotational speed range to the high rotational speed range of the engine, thereby reducing the mechanical loss and noise of the oil pump. We have developed an oil tank device for motorcycles that can prevent overheating and seizure of various parts of the engine, and improve engine durability by stabilizing oil pressure, temperature, and viscosity. The purpose is to provide.

[Structure of the invention]

(Means for Solving the Problems) The present invention connects a main tube and a down tube connected to a head pipe by a bridge tube,
The space surrounded by the main tube, the dowel 1-b, and the bridge tube is surrounded from the left and right by a pair of bulge-molded plates, and the periphery is welded to form a hollow oil tank, and the main tube and bridge tube are In an oil tank device for a motorcycle, which has a long passage that guides oil introduced from an engine's oil pump into a main tube near a head pipe to the oil tank, near the junction of the main tube with the bridge tube. A chamber tank for separating air contained in the oil is provided integrally or integrally with the main tube, and an oil stopper is provided in the main tube for guiding at least a portion of the oil flowing from the head pipe side to the chamber tank, The opening leading to the chamber tank is formed wider than the opening leading to the bridge tube.

(Operation) Air-mixed oil discharged from the engine's oil pump is introduced into the main tube near the head pipe, and flows toward the rear of the vehicle through an oil passage formed in the main tube. The air-mixed oil flowing inside the main tube toward the rear of the vehicle hits the oil stopper,
At least a portion of it flows into the chamber tank. In this case, since the opening leading to the chamber tank is formed wider than the opening leading to the bridge duplex, the loss of oil mixed with air flowing into the chamber tank can be increased.

The oil mixed with air that has flowed into the chamber tank is separated from most of the air while it remains in the chamber tank.
The oil from which air has been separated passes through the main tube through the opening, and further flows into the bridge tube through the opening leading to the bridge tube. The ∆air that flows into the bridge tube flows into the oil tank, and after completely separating the air, it is supplied to the engine through the down tube.

In this way, since sufficient oil reservoir capacity is ensured by the chamber tank, even if the oil level drops in the mid to high speed range of the engine, the air in the oil can be sufficiently separated and supplied to the engine. I can do it.

(Example) A practical example of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 3, the same parts as in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 2, the main tube 2 of the vehicle body frame 27
A head pipe 1 is fixed to the front end, and a head vibe 1
A down tube 3 is provided that extends downward from the vehicle body.

These down tube 3 and main tube 2 are connected by a bridge tube 4. Reference numeral 5 indicates a plate material that surrounds the space surrounded by the main tube 2, down tube 3, and bridge tube 4 from the left side, and this plate material 5 also serves as a reinforcement member l~. A front wheel 30 is connected to the head pipe 1 via a steering shaft (not shown) (a fork 28 is pivotally supported, a handlebar 29 is provided at the upper part of the front fork 2B, and a front wheel 30 is rotatably attached to the lower part of the fork 28). Supported. The symbol @31 indicates the front fork.

A pair of left and right body tubes 7 are connected to the rear end of the main tube 2, and the lower ends of the body tubes 7 are connected to an under tube 10 extending from the down tube 3 via a cross member 32. These undertubes 1
An engine 11 is mounted in a space surrounded by the engine 0 and the body duplex 7. A pivot portion 33 is fixed to the body tube 7, and a swing arm 34 extending in the longitudinal direction of the vehicle body is supported by the pivot portion 33 so as to be freely vertically supported, and a rear wheel 35 is rotatably supported at the rear end of the swing arm 34. Supported. A seat rail 8 extends from the body tube 7 toward the vehicle body, and this seat rail 8 is reinforced by a seat pillar 9. A seat 36 is provided above the seat rail 8, and a fuel tank 37 is mounted in front of the seats 1 to 36 so as to straddle the vehicle body frame 27. Note that the reference numeral 38 indicates a rear fender.

In FIGS. 1 and 3, air-mixed oil discharged from an oil pump (not shown) of the engine 11 rises through the oil introduction hose 13, passes through the oil guide hose 15 from the connection 14, and passes through the opening 16. It is introduced into the main tube 2 near the head vibe 1 from the main tube 2 . The air-mixed oil introduced into the main tube 2 flows toward the rear of the vehicle body through an oil passage formed within the main tube 2, and collides with the oil stopper 17Δ.

The oil stopper 17A is provided near the joint with the bridge tube 4 in the main tube 2, and
It is formed into a hemispherical shape that protrudes to the side. Oil stopper 1
A chamber tank 40 is provided at the upper part of 7A, either integrally or integrally with the main tube 2. Chamber tank 40
Is this the oil passage and opening in main tube 2? 11, and the opening 41 is formed at a position where it is easy to introduce the air-mixed oil that has hit the oil stopper 17A into the chamber tank 40. The chamber tank 40 has a predetermined internal capacity to ensure a sufficient oil reservoir capacity even when the oil level drops to position B in the middle to high speed range of the engine.

An air discharge pipe 42 for discharging the air separated inside is connected to the upper part of the chamber tank 40, and the (l!! end) of this air discharge pipe 42 is connected to the upper part of the main tube 2.

A nii opening 43 is formed at the joint between the main tube 2 and the bridge tube 4, and during this time, the 11 part 43 absorbs the oil that has hit the oil stopper 17A and the jamba tank 4.
It is formed at a position where it is easy to introduce oil into the bridge tube 4 after the oil has been circulated and the air has been separated. This opening 43
The relationship between the diameter d and the diameter of the frontage portion 41 is d<Q. J3, the shape of the oil stopper 17A is not limited to a hemispherical shape, but any shape that can change the flow of oil to the opening 41 side and the frontage 43 side can be a circle! It may be one shape or the shape of the song.

Next, the operation of the above embodiment will be explained.

The air A-il introduced into the main tube 2 from the engine 11 through the oil introduction boss 13 and the oil guide hose 15 flows inside the main tube 2 toward the rear of the vehicle body and collides with the oil stopper 17A. The oil that hit the oil stopper 17A is on the frontage 41 side and 4
Change the flow to the 3rd side. The ratio of the oil flow U flowing toward the opening 41 side and the oil flow m flowing toward the opening 43 is determined by the shape of the oil stopper 17A and the relationship between the diameter of the opening 41 and the diameter d of the opening 43. . While oil mixed with air flows through the main tube 2 due to the force of the vehicle body, the air in the oil moves to a relatively upper layer, and the proportion of air decreases in the lower layer. The oil that directly flows into the pipe 4 contains relatively little oil. On the other hand, the oil in the upper layer where a relatively large amount of air is mixed flows into the chamber tank 40 from the opening 41, and while staying in the chamber tank 40, the air is separated, and the separated air is Air is discharged from the air discharge pipe 42 to the upper part of the main tube 2. The oil from which air has been separated in the chamber tank 40 flows through the opening 4.
1 again into the main tube 2, and roughly flows into the bridge duplex 4 through the opening 43. Therefore, the oil that flows into the bridge tube 4 is only oil that contains less air.

Furthermore, even when the oil level is low as shown in B in the middle to high speed range of the engine, sufficient oil reservoir capacity is ensured by the chamber tank 40.
The oil residence time is increased, and oil separation can be completed.

As described above, according to the above embodiment, P1'II! from the middle speed range of the engine! Since the oil can be completely separated even in the region, only oil that does not contain air can be supplied to the engine 11.

Therefore, it is possible to prevent mechanical losses and noise from the oil pump, and also to stabilize the oil pressure, preparation, and circulation amount, and to prevent overheating and seizure of various parts of the engine. can improve the durability of Further, since it is only necessary to provide the oil stopper 17A and the chamber tank 40, the structure is simple and production costs can be kept low.

〔Effect of the invention〕

The present invention includes integrally or integrally installing a chamber tank for separating air contained in oil near the joint of the main tube with the bridge tube, and at least part of the oil flowing from the head pipe side. An oil stopper that guides the oil to the chamber tank is provided in the main tube, and the opening leading to the chamber tank is made wider than the opening leading to the bridge tube.
Only oil that does not contain air can be supplied to the engine even in the medium to high speed range of the engine, preventing mechanical losses and noise from the oil pump, and controlling oil pressure, temperature, and circulation ports. By stabilizing the engine, overheating and seizure of various parts of the engine can be prevented, and the durability of the engine can be improved.

42...Air discharge pipe.

Claims (1)

[Claims] The main tube and down tube connected to the head pipe are connected by a bridge tube, and the space surrounded by the main tube, down tube, and bridge tube is surrounded from the left and right by a pair of bulge-molded plates, and the peripheral edges are welded. a hollow oil tank, and the main tube and bridge tube form a long passage for guiding oil introduced from the engine's oil pump into the main tube near the head pipe to the oil tank. In the oil tank device, a chamber tank for separating air contained in the oil is provided integrally or integrally near the joint of the main tube with the bridge tube, and at least a portion of the oil flowing from the head pipe side is An oil tank device for a two-wheeled motor vehicle, characterized in that an oil stopper for guiding to a chamber tank is provided in a main tube, and an opening leading to the chamber tank is formed wider than an opening leading to a bridge tube.