JPH059996Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a vent hose for a riding type vehicle such as a three-wheeled motorcycle, a four-wheeled motorcycle, or a two-wheeled motor vehicle, which is driven by riding astride a seat attached to the upper part of the vehicle body frame. Regarding the guide structure.

[Conventional technology]

The three-wheeled bike and two-wheeled motor vehicle mentioned above are generally
A front fork for suspending the front wheel is rotatably supported by a steering head provided at the front of the vehicle body frame, and a swing arm for suspending the rear wheel is pivotally supported by a pivot shaft provided at the center of the vehicle body frame. A load-carrying cushion unit is installed between the swing arm and the body frame, and the rear wheels are driven by an engine mounted near the front of the center of the body frame.

Additionally, a fuel tank, seat, etc. are attached to the upper part of the vehicle from the front, and in some cases, an air cleaner and the like are also attached.

Three-wheeled bikes drive the left and right rear wheels, so differential gears are usually used.

The driver rides the vehicle by riding on a seat attached to the upper part of the vehicle, grasping a bar handle attached to the front fork, and placing his/her feet on steps provided on both sides of the lower part of the vehicle.

In addition, on a four-wheeled bike, the front two wheels are steered, so
In place of the front fork, a steering system including a steering shaft and tie rods, and a suspension that suspends the left and right front wheels independently, are generally used, but in other respects the configuration is substantially the same as the three-wheeled bike described above. have.

Therefore, riding type vehicles generally have a configuration in which a fuel tank is mounted above the engine.

The engine case, carburetor, or differential gear case of this type of riding vehicle requires ventilation means to prevent internal pressure fluctuations and maintain atmospheric pressure, and a vent hose is often connected to the engine case, carburetor, or differential gear case. ing.

These vent hoses ensure communication with the atmosphere, but it is necessary to prevent the intrusion of foreign substances such as dust and water and the transmission of pressure fluctuations due to wind, etc. It is required that the outlet be installed facing downward into clean air.

[Problem that the invention attempts to solve]

By the way, in conventional riding-type vehicles, each vent hose led out from the engine case, carburetor, differential gear case, etc. is led to the upper member of the vehicle body frame and tied with a band along the frame member. It was installed by methods such as clamping with metal fittings fixed to the frame member.

However, with such conventional vent hose guide devices, the vent hose is placed along the vehicle body frame, so there is a limit to the height at which it can be placed, and it has not been possible to fully meet the demand for placing the vent hose in a higher position. .

[Purpose of invention]

The purpose of the present invention is to solve the problems of the conventional technology, to be able to securely guide and hold the vent hose in a riding type vehicle at a sufficiently high position without creating any protrusions, etc. To provide a vent hose guide structure capable of simply and easily attaching a plurality of vent hoses from each device.

[Means to achieve the purpose]

The vent hose guide structure of the present invention is used in a riding type vehicle in which a fuel tank is attached to the upper part of the vehicle body and a seat is attached to the rear side.The vent hose guide structure of the present invention forms a continuous concave groove with both ends opening downward on the rear surface of the fuel tank. a vent hose from an engine case, a carburetor, etc. is fitted over almost the entire length of the groove, and the open end of the vent hose is opened downward near the opening on the opposite side of the groove; The above object is achieved by providing a detachment prevention means that engages the outside of the vent hose to prevent the vent hose from coming off the groove.

〔Example〕

The present invention will be explained in detail below with reference to the drawings.

FIG. 3 shows the main structure of a riding type vehicle (in the case of a four-wheeled motorcycle) equipped with a vent hose guide structure according to the present invention.

In FIG. 3, an engine 2 is mounted in the center of a vehicle body frame 1 made of a pipe welded structure, and left and right front wheels 3, 3, which are steering wheels, are suspended on both sides of the front of the vehicle body frame 1. car body frame 1
Left and right rear wheels 4, 4 driven by the engine 2 are suspended at the rear of the vehicle.

A steering shaft 5 extending substantially vertically is pivotally supported at the front part of the vehicle body frame 1, a bar handle 6 is fixed to the upper end of the steering shaft, and left and right front wheels 3, 3 are attached to the lower part of the steering shaft. A tie rod (not shown) leading to is connected. Further, the left and right front wheels 3, 3 are each independently suspended on both sides of the front portion of the vehicle body frame 1.

The left and right rear wheels 4, 4 are suspended by a swing arm 7 and a load-carrying cushion unit (not shown), and are driven by the engine 2 via a transmission mechanism (not shown) such as a drive chain or a drive shaft. This transmission mechanism is connected to a differential gear 8 that drives left and right rear wheels 4, 4.

A fuel tank 9 and a seat 10 are attached to the upper part of the body frame 1 from the front, and footrests 11, 11 are provided on both sides of the lower part of the body frame 1.

The vehicle body frame 1 is appropriately covered with a frame cover (vehicle body cover) (not shown) made of plastic or the like, and this frame cover is provided with a fender portion either integrally or detachably.

The driver straddles the seat 10, puts his feet on the footrests 11, 11, and grips the bar handle 6 (specifically, the grip portion thereof) to drive.

A carburetor 12 and an air cleaner 13 are connected to the intake port of the engine 2.

Incidentally, in the case 14 of the engine 2, there is an air vent hose 1 that communicates the crank chamber with the atmosphere.
5, the carburetor 12 is provided with an air vent hose 16 that communicates the float chamber with the atmosphere, and the differential gear 8 is further provided with an air vent hose 17 that communicates the inside of the gear case with the atmosphere. It is being

The engine case 14, the carburetor 12, and the differential gear 8 are disposed on the surface of the fuel tank 9.
Each vent hose 15,1 derived from the case of
A vent hose guide structure for guiding and holding the vent hoses 6 and 17 is provided.

FIG. 1 is a rear perspective view of the fuel tank 9, and FIG. 2 is a partial vertical sectional view taken along the line - in FIG.

1 to 3, the vent hose guide structure is a concave groove 2 formed on the rear surface of the fuel tank 9.
It is made up of 0.

As shown in FIG. 1, this groove 20 is formed as a substantially inverted U-shaped groove having substantially downward entrances and exits 21, 22, and as shown in FIG. By being fitted into the fuel tank 20 and covering the outside with the tank cover 23, it is guided and held over the fuel tank 9 without coming off.

In this case, each vent hose 15, 16, 17
As shown in FIG. 1, it is inserted into the groove 20 from one of the entrances and exits 21 or 22, and is inserted and fitted until at least its open end faces downward toward the other entrance and exit 22 or 21. In addition, in the illustrated example, each vent hose 15, 1
6 and 17 are each fitted over substantially the entire length of the groove 20, and their open ends open downward near the entrance/exit 22 or 21 on the opposite side.

According to the embodiment structure described above, the engine 2
In a riding type vehicle (the illustrated example is a four-wheel motorcycle) having a fuel tank 9 mounted above and a seat 10 mounted behind it, a groove 20 having entrances and exits 21 and 22 on the lower side is provided on the surface of the fuel tank 9. The vent hoses 15, 16, 17 from the engine case 14, the carburetor 12, the differential gear 8, etc. are fitted into the groove 20, and the vent hoses 15, 16, 17 are inserted into the groove. Separation prevention means (tank cover 2
3 etc.), the vent hoses 15, 16, 17 can be installed at a higher position by utilizing the surface of the fuel tank 9, which is installed at a higher position in the vehicle body, and this can prevent foreign objects from entering. We were able to realize a vent hose guide structure for a riding-type vehicle that is extremely advantageous for processing.

In addition, the vent hoses 15, 16, and 17 are fitted into the grooves 20 formed on the rear surface of the fuel tank 9,
Since their open ends are guided downward, the open ends of each vent hose can be covered by the front end of the sheet 10, and the intrusion of foreign matter can be reliably prevented and the influence of pressure fluctuations caused by running wind etc. can also be reliably eliminated. was completed.

In addition, in the illustrated embodiment structure, the vent hose 1
5, 16, and 17 was used as a tank cover 23 attached to a position that covers the fuel tank 9. This separation prevention means consists of insert female threads 24, 24 and bolts (screws) as shown in FIG. ) 25, 25 may be appropriately provided.

Further, the cross-sectional shape of the groove 20 is the fifth
As shown in the figure, each of the vent hoses 15, 16 and
17 can also be shaped to guide and hold it.

The illustrated groove 20 has entrances and exits 21 and 22 at both ends thereof.
The opening was opened almost vertically downward, but it would be sufficient to make it tilt downward, and there was an entrance/exit 2 at the bottom.
1 and 22 may be provided, and they can be formed in various arrangements.

In addition, the vent hose to which the present invention can be applied is not only the vent hose of the engine case, carburetor, and differential gear case shown in the figure, but also the vent hoses of air cleaners, brakes, etc. . Note that the material of the vent hose in this application is not limited, and various flexible tubes such as a normal tube and a tube containing a reinforcing coil can be used as long as the tube is flexible.

Further, in the illustrated embodiment, the present invention is applied to a four-wheeled motorcycle, but the present invention can be applied to a three-wheeled motorcycle or an automobile if the vehicle is a riding type vehicle that has a fuel tank, air cleaner, or other container mounted on the upper part of the vehicle body or above the engine. It is widely applicable to various vehicles such as two-wheeled vehicles.

[Effect of idea]

As is clear from the above description, according to the vent hose guide structure for a riding type vehicle of the present invention, in a riding type vehicle in which a fuel tank is attached to the upper part of the vehicle body and a seat is attached to the rear side, the rear side of the fuel tank is A continuous groove with both ends opening downward is formed on the surface, and a vent hose from an engine case, a carburetor, etc. is fitted over almost the entire length of the groove, and the open end of the vent hose is inserted into the groove. The structure is such that a detachment prevention means is provided that opens downward near the opening on the opposite side of the fuel tank and engages with the outside of the vent hose to prevent the vent hose from coming off the groove. With an extremely simple configuration that uses grooves formed on the surface, regardless of the type of device to be vented or the number of vent hoses, these vent hoses can be used to prevent foreign objects from entering and to avoid the effects of pressure fluctuations caused by running wind. To provide a vent hose guide structure for a riding type vehicle, which can be easily installed without the need for a vent hose.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the main parts of the vent hose guide structure for a riding vehicle according to the present invention, and FIG.
Figure 3 is a partial cross-sectional view taken along the line - in Figure 1.
FIG. 4 is a perspective view showing the main structure of a four-wheeled motorcycle equipped with the vent hose guide structure shown in FIG.
FIG. 5 is a partial sectional view of a vent hose guide structure according to still another embodiment of the present invention. 2... Engine, 8... Differential gear, 9... Fuel tank, 12... Carburetor, 14... Engine case, 15, 16, 17... Vent hose, 20...
...Concave groove, 21, 22... Entrance/exit (concave groove), 23...
...tank cover, 26...pressing plate.

Claims (1)

[Scope of utility model registration request] In a riding type vehicle that has a fuel tank attached to the top of the vehicle body and a seat attached to the rear side, a continuous groove with both ends opening downward is formed on the rear surface of the fuel tank, so that it can be removed from the engine case, carburetor, etc. A vent hose is fitted over almost the entire length of the groove, and the open end of the vent hose is opened downward near the opening on the opposite side of the groove, and is engaged with the outside of the vent hose. A vent hose guide structure for a riding type vehicle, characterized in that a detachment prevention means is provided for preventing the vent hose from coming off the groove.