JP3013429B2 - Rear fender device for motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a rear fender device for a motorcycle,
In particular, the present invention relates to a rear fender device for a motorcycle in which a fuel cock mounting structure to a rear fender is improved.

(Prior Art) Among motorcycles, there is a scooter type vehicle in which an underbone frame is used for a body frame. In this scooter type vehicle, a unit swing type engine as a power unit having a transmission case is attached to a lower center part of a body frame, and a rear wheel is rotatably supported at the rear end of the transmission case of the engine. The rear wheel is covered from above by a rear fender attached to the body frame.

On the other hand, a fuel tank is disposed below a seat of a scooter type vehicle, and this fuel tank is generally located above a rear fender. A fuel cock is connected to a fuel inlet pipe led out of the fuel tank, and a fuel outlet tube from the fuel cock is connected to a carburetor of an engine intake system. The fuel cock is turned on and off in conjunction with the engine negative pressure, a fuel passage is opened by the engine suction negative pressure, and fuel is supplied to the carburetor.

(Problems to be Solved by the Invention) In a conventional motorcycle, a fuel cock dedicated mounting bracket is fixed to a body frame by welding or the like,
The fuel cock was fastened to this dedicated mounting bracket using a fastening screw or the like.

However, since a cock-specific mounting bracket is required to mount the fuel cock, the number of parts increases, which leads to an increase in cost, an increase in die cost, and a special carburetor. And so on are attached near where the engine accessories are arranged in a complicated manner, and there is a problem that the installation is difficult.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a rear fender device for a motorcycle in which a fuel cock mounting portion is integrally formed with a rear fender, so that a cock-specific mounting bracket is not required, and cost and mold costs can be reduced. .

Another object of the present invention is to provide a rear fender device for a motorcycle in which a hose guide for arranging a fuel hose is integrally formed on a rear fender to guide the fuel hose stably and improve reliability. .

[Configuration of the invention]

(Means for Solving the Problems) A rear fender device for a motorcycle according to the present invention includes:
In order to solve the above-mentioned problem, as described in claim 1, a rear fender that covers a rear wheel from above and has a fuel tank installed is attached to a vehicle body frame, and a cock attachment portion is integrally formed with the rear fender. ,
A fuel cock that can open and close a fuel passage is provided in the middle of a fuel hose that is connected to the carburetor of the engine so that fuel in the fuel tank can be supplied, and the fuel cock is attached to a cock mounting portion of a rear fender.

According to a second aspect of the present invention, in order to solve the above-described problem, in addition to the first aspect, a hose guide for guiding a fuel hole connected to a fuel cock near a cock mounting portion of the rear fender. Is provided integrally with the rear fender.

(Operation) In the rear fender device of the motorcycle, the cock attachment portion is integrally formed with the rear fender, so that the fuel cock can be directly attached to the cock attachment portion.
The mounting of the fuel cock becomes easy, and a mounting bracket dedicated to the fuel cock is not required, so that cost reduction and die cost reduction can be achieved.

In addition, a hose guide for fuel hose routing is integrally formed with the rear fender, and this hose guide guides the fuel hose stably and smoothly, so that reliability can be improved, while the hose guide is connected to the rear fender. Since they are integrally formed, there is no need to provide a hose guide as an independent part, and cost and mold costs can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 shows a scooter type vehicle employing an underbone type vehicle body frame 10 as a motorcycle. In this scooter type vehicle, a unit swing type engine 11 is supported at the lower center of the vehicle body frame 10. The unit swing type engine 11 includes a transmission case 12 also serving as a swing arm. A rear wheel 13 is rotatably supported at the rear end of the transmission case 12, and the transmission case 12 is provided to be swingable by a rear suspension 14. The rear suspension 14 is interposed between the rear upper portion of the transmission case 12 and the rear side of the vehicle body frame 10.

On the other hand, the scooter type vehicle has a pair of side frames 16 extending obliquely rearward and upward from the rear end of the underbone frame 15 constituting the body frame 10, and an article storage box 18 is provided on the side frames 16. . An article storage chamber 20 such as a helmet 19 is formed in the article storage box 18, and an upper opening of the article storage chamber 20 is openably and closably covered by a sheet 21.

By the way, the rear wheel 13 of the scooter type vehicle is covered by the rear fender 23 from above. The rear fender 23 has a front end attached to the bottom wall of the article storage box 18, while a rear frame 24 extends rearward from both sides above and behind the article storage box 18 as shown in FIGS. 3 to 6. The rear end of this rear frame 24 is a bridge
Reinforced by 25. A mounting bracket 26 is integrally extended downward from the bridge 25, and a rear portion of the rear fender 23 is mounted to a lower end of the mounting bracket 26. A bracket 28 projecting upward is provided integrally or integrally with the rear fender 23 at a position slightly deviated laterally from the center in the front-rear direction of the rear fender 23. The bracket 28 is provided between the rear frame 24 and a center bridge. Fixed by 30. A rear cowling 31 (see FIG. 2) such as a side cover that covers the scooter type vehicle from the side is attached to the center bridge 30.

The rear fender 23 has an oil tank 35
However, a fuel tank 36 is installed at the rear.
The oil tank 35 has an oil filler port 37 from the tank body.
It extends upward to just below, and is opened below the seat 21 so as to be able to refuel. When the seat 21 is opened, refueling is possible.

On the other hand, the fuel tank 36 is fastened by a tank band 38, while its fuel supply port 40 extends obliquely to the side and opens to face a fuel lid (not shown) provided to be openable and closable on the rear cowling 31. I have. As shown in FIG. 4, a fuel drain tray 41 is mounted around the fuel supply port 40, and a drain hose 44 is connected to the drain tray 41 via a drain union 43 mounted on a drain port 42 at the bottom thereof. The fuel drain is discharged to the outside via the drain tray 41. Reference numeral 45 denotes a fuel level gauge attached to the top of the fuel tank 36.

A breather hose 47 and an air vent hose 48 are respectively connected to a fuel flow path near the fuel supply port 40 of the fuel tank 36. Of these, the breather hose 47 is routed inside the rear cowling 31, bundled together with the drain hose 44, and opened to the outside. Further, the air vent hose 48 is connected to a negative pressure type fuel cock 50 that is opened and closed by an engine negative pressure.

As shown in FIG. 1, the fuel cock 50 is integrally fastened to a cock mounting portion 51 integrally formed on a front side portion of the rear fender with a fastening tool such as a fastening bolt 52 and a nut 53. . 54 is a washer. This fuel cock
A vacuum hose 55 for guiding the engine negative pressure from the engine 11 is connected to 50, while a fuel inlet hose 56 and a fuel outlet hose 57 (third outlet) are connected to the vacuum hose 55.
FIG. 5, FIG. 5 and FIG. 6) are connected. The fuel cock 50 is provided in the middle of the fuel hoses 56, 57, and can open and close the fuel passage in response to the engine negative pressure. The fuel inlet hose 56 is led out from the bottom of the fuel tank 23 and has a guide boss (projection) 58 as a hose guide for guiding the fuel hose arrangement.
Is connected to the fuel cock 50. The guide boss 58 is attached to a side portion of the rear fender 23 near the cock attachment portion 51 by integral molding.

Further, a fuel outlet hose 57 from the fuel cock 50 extends downward through a guided hole 60 as a hose guide, and is connected to a carburetor 61 (see FIG. 5). The guide hole 60 is provided in the cock mounting portion 51 of the rear fender 23.
And a vacuum hose 55 is guided along with the fuel outlet hose 57.

On the other hand, as shown in FIGS. 9 (A) and 9 (B), the cock mounting portion 51 integrally formed with the rear fender 23 has a mounting seat.
A mounting hole 63 and a positioning guide 65 are formed in the mounting seat 63, and a bolt hole 67 of the cock support arm 66 is formed in the mounting hole 64 as shown in FIG. After the tightening bolt 52 is inserted in this aligned state, and is locked by the positioning guide 65, it is tightened and fixed with a nut or the like.

Further, a mounting seat 68 is recessed at the center of the rear fender 23 as shown in FIG. 10, and a cleaner mounting plate 69 is interposed in the mounting seat 68 for reinforcement. The cleaner body 71 of the cooling air cleaner 70 is mounted from below, and fixed as shown in FIG. The cleaner body 71 has an inlet 72 and an outlet 73
An air filter 75 is provided on the inflow port 72 side, and the air filter 75 is covered and held by a cleaner cap 76.

A flexible cleaner hose 77 is connected to an outlet 73 of the cleaner body 71, and the cleaner hose 77 communicates with a belt chamber (dry chamber) on the transmission case 12 side of the unit swing type engine 11, and this belt chamber is Cooling.

Incidentally, when removing the fuel tank 36 from the vehicle body, it is necessary to remove a fuel hose connecting the fuel tank 36 and a carburetor (not shown). At this time, in order to prevent the fuel from flowing out of the fuel hose, the fuel hose 57 is located downstream of the fuel cock 50.
It is common to remove. Even after the fuel tank 36 has been removed, the fuel cock 50 needs to be located near the fuel tank, and the fuel cock 50 is preferably attached to the rear fender 23 so that it can be removed from the vehicle body together with the fuel tank 36.

〔The invention's effect〕

As described above, in the motorcycle rear fender device according to the present invention, the cock attachment portion is integrally formed on the rear fender, and the fuel cock is attached to the cock attachment portion, so that the fuel cock is directly attached to the rear fender. In addition to simplifying the installation, the need for a dedicated mounting bracket for the fuel cock has been eliminated, reducing costs and reducing mold costs.Furthermore, even when removing the fuel tank, the fuel cock can be attached to the rear fender cock mounting part. By attaching
The fuel cock can be removed together with the fuel tank, and the handling of the fuel cock can be performed smoothly and easily.

Further, a hose guide for arranging the fuel hose is integrally formed near the cock mounting portion of the rear fender, and the fuel hose is guided stably and smoothly by this hose guide, so that reliability can be improved. Since the hose guide is formed integrally with the rear fender, there is no need to provide the hose guide as an independent component, and it is possible to further reduce costs and mold costs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a rear fender device for a motorcycle according to the present invention. FIG. 2 is an overall view showing a scooter type vehicle as a motorcycle provided with the rear fender device, FIG. FIG. 4 is a perspective view of the rear fender device of the motorcycle as viewed from the upper left front and upper right, FIG. 5 and FIG. 6 are side and plan views of the rear fender device of the motorcycle, FIG. FIG. 8 is a plan view and a side view showing the structure of the rear fender of the motorcycle rear fender device. FIG. 9 (A) is a plan view showing a cock mounting part integrally formed with the rear fender, and FIG. 9 (B). ) Is a sectional view taken along the line AA in FIG. 9 (A), FIG. 10 is a perspective view showing a mounting structure of a crankcase cleaner to a rear fender, and FIG. 11 is a perspective view showing a crankcase cleaner device. FIG. 10 ... body frame, 11 ... unit swing type engine, 12 ... transmission case, 13 ... rear wheel, 16 ... side frame, 18 ... article storage box, 21 ... seat, 23 ...
Rear fender, 31 ... rear cowling (side cover), 35 ... oil tank, 36 ... fuel tank,
37,40… Refueling port, 47… Breather hose, 48… Air vent hose, 50… Fuel cock, 51… Cock mounting part, 55… Vacuum hose, 56… Fuel inlet hose, 57… Fuel outlet hose, 58… Guide boss (hose guide), 60… Guide hole (hose guide), 70… Cooling air cleaner, 71…
... cleaner body, 77 ... cleaner hose.

Claims (2)

(57) [Claims] 1. A rear fender, which covers a rear wheel from above and has a fuel tank mounted thereon, is attached to a vehicle body frame, and a cock mounting portion is integrally formed with the rear fender, and fuel in the fuel tank can be supplied to a carburetor of an engine. A rear fender device for a motorcycle, characterized in that a fuel cock that can open and close a fuel passage is provided in the middle of a fuel hose connected to the fuel hose, and the fuel cock is mounted on a cock mounting portion of the rear fender. 2. The rear fender device for a motorcycle according to claim 1, wherein a hose guide for guiding a fuel hole connected to a fuel cock is provided integrally with the rear fender near the cock mounting portion of the rear fender.