JPS61211179A - Front fender for motorcycle, etc. - 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] B. Purpose of the invention [Industrial application field] The present invention relates to a front fender for a motorcycle or the like.

[Conventional technology]

In the front fender, a large number of horizontally elongated ventilation holes are provided in the vertical direction at the rear lower part of the front fender, which has a U-shaped cross section and has a main wall that curves mid-height along the front wheels and walls on both sides. It is known that a louver is provided on the upper edge of the mouth diagonally downward (for example, in 1982-826).
(See Publication No. 9).

[Problem that the invention seeks to solve]

In the above technique, from the viewpoint of cooling air for the engine, it is necessary to make the ventilation hole as large as possible, but there is a restriction in terms of the strength of the fender.

Also, from the point that the muddy water that splashed on the back side of the upper part of the fender and flowed along the fender will be blown towards the engine from the ventilation hole mentioned above, polluting the engine.
Ventilation openings are subject to restrictions.

The present invention provides a front fender that achieves the intended purpose of ventilation despite the above limitations.

1. Structure of the Invention [Means for Solving Problems] The present invention provides a front fender 1 having a U-shaped cross section and having a main wall curved in a middle and high direction along the front wheels 2, and side walls 11b on both sides thereof. In the front fender of a motorcycle, etc., in which a large number of horizontally elongated ventilation holes 8 are provided in the vertical direction in the rear lower part 11, and louvers 8a are provided on the seven edges of each of the ventilation holes 8 in a diagonal rearward direction toward the engine 6. A ventilation hole 8 is provided extending to the side wall 11b, and a ventilation hole 8 is provided in the center of the main wall.
A central wall 11. vertically connects the Lr edges of . a is continuous with the upper part of the front fender 1 that does not have the ventilation opening 8,
It is formed linearly along the front fender up to the lower edge of the front fender 1 to serve as a flow path for muddy water adhering to the back surface of the upper part of the fender, with the center wall flow path facing the down tube 7 in front of the engine.

and are characterized in that they are arranged close to each other.

[For production]

(1) The driving wind is the central wall 11 of the fender 1. a, the flow is divided into the left and right ventilation holes 8, and passes through both sides of the down tube 7 as shown in FIG. The airflow that hits the downtube directly from one ventilation hole does not create turbulence immediately after the downtube, reducing the flow speed and reducing the engine cooling effect.

(2) Since the fender rigidity is ensured by the central wall 11a and both side walls 11b, the ventilation opening 8 can be extended to the side walls and enlarged to improve the amount of air passing through.

(3) During rainy weather, muddy water that splashes up and adheres to the back of the upper part of the fender is collected in the center of the main wall of the mid-high height by the driving wind.
Since muddy water flowing down along the main wall is guided from the main wall through the center 911a to the lower end of the fender, it is not sprayed toward the engine from the ventilation opening.

〔Example〕

FIG. 1 shows a side view of a part of a motorcycle to which the present invention is applied. A front fender 1 is attached to a bottom bridge 4, etc., which is located above a front wheel 2 and supports a front fork 3. 6 is an engine mounted on the body frame 5 behind the front fender 1.

As shown in FIG. 4, the front fender 1 is formed into a simple U-shape in transverse direction, with a main wall curved in a middle and high direction, and side walls 11b and Llb on both left and right sides of the main wall.
1 is located in front of the down tube 7 at the front of the engine.

In the illustrated example, a plurality of ventilation holes 8 are provided on both left and right sides of the rear lower part 11 of the front fender 1, as shown in FIGS. 2 and 3, and each of the ventilation holes 8 is shown in FIG. The center wall 11 extends to the left and right side walls itb and Ilb, and continues with the upper part of the fender between the left and right ventilation holes 8 and 8.
A is formed linearly to form a flow path for muddy water.

In addition, as shown in Fig. 1, the front part 1 of the front fender l
When a part 12a of the fender 1 is cut and raised in the tangential direction of the upper part of the fender 1 to guide the wind from the front, the wind is guided along the arcuate surface of the fender 1 to the ventilation opening 8 of the rear lower part 11, and the engine 6 The cooling effect can be further improved.

C.9 Effects of the Invention With the above configuration, the running air passing through one ventilation port is efficiently used for cooling the engine due to the action described in the above-mentioned action section (1). As shown in (2) above, since the center wall 11a acts as a backbone, the ventilation opening 8 can be formed large while maintaining the necessary strength, and in combination with the above (1), the objective effect of cooling the engine can be fully achieved. As a result of the action (3), the muddy water adhering to the upper rear surface of the fender flows from the middle height center of the main wall to the center gl l a and flows down in a straight line to the lower end of the fender, so it does not stain the engine etc. Moreover, it does not accumulate on the upper back surface of the fender 1.

[Brief explanation of drawings]

FIG. 1 is a side view of a part of a motorcycle to which the present invention is applied;
Figure 2 is an enlarged longitudinal side view of the rear lower part of the front fender.
FIG. 3 is a rear view thereof, and FIG. 4 is a cross-sectional plan view showing the arrangement relationship of the front fender, down tube, and engine. 1 is a front fender, 11 is its lower part, 11a is its center wall, llb is a side wall, 5 is a body frame, 6 is an engine, 7 is a down tube, 8 is a ventilation hole, and 8a is a louver.

Claims (1)

[Claims] (1) A front fender with a U-shaped cross section has a main wall curved mid-height along the front wheels and walls on both sides, with a number of horizontally elongated ventilation holes vertically provided at the rear lower part of the front fender, each of which has In the case where a louver is provided on the upper edge diagonally downward to the rear, the ventilation hole is provided extending to the side wall, and a center wall is provided in the center of the main wall to connect the upper and lower edges of the ventilation hole in the vertical direction, It is continuous with the upper part of the front fender that does not have a ventilation hole, and is formed linearly along the front fender up to the lower edge of the front fender to serve as a flow path for muddy water adhering to the back surface of the upper part of the fender. A front fender of a motorcycle, etc. that faces the front downtube and is located close to it.