JPH1035562A - Rear fender of motorcycle - Google Patents

Abstract

(57) [Problem] The present invention enables easy and inexpensive molding of component parts, and is easy by only partially changing the diameter and width of the rear wheel when the rear wheel is changed. An object of the present invention is to provide a motorcycle fender capable of coping with the above. SOLUTION: A pair of left and right stay members 2 fixed so as to protrude upward from upper edges of swing arms 8, 9 are provided.
1 and 22 and upper end portions 21a of both stay members 21 and 22;
A fender body 23 which is detachably fixed to the rear wheel 22a and covers a part of the rear wheel 5;
At least one of the fenders 22 is integrally formed with a chain case portion 21a1 that covers an upper side portion of the chain 12 bridged over the driven sprocket 10, and the front end 23a of the fender body 23 is vertically above the axle of the rear wheel 5. Position P
1 and the rear end 23b is at the rear wheel rear end position P2.
So that it is located further back.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rear fender for a motorcycle, and more particularly to a motorcycle fixed to a pair of left and right swing arms.

[0002]

2. Description of the Related Art Conventionally, motorcycles have been provided with fenders in order to prevent large splashes from the rear wheels from scattering outward. For example, FIG. 12 and FIG. 14 and 15 and FIG. 16 have been proposed and implemented. FIG. 12 and FIG.
The rear fender b1 shown in FIG. 3 is formed integrally with the chain case d1 fixed to the upper end of the swing arm c1 of the motorcycle a1, and covers the rear half upper part of the rear wheel e1.

FIGS. 14 and 15 show a front fender b2a and a rear fender b2b. The front fender b2a is fixed to the upper edge of the swing arm c2, and the rear fender is connected to the front fender. And is fastened and fixed with a screw f2. Further, the one shown in FIG. 16 has a front fender b3a fixed to the upper end of the swing arm c3 and a rear fender b3a fastened by a screw f3 so that the front end overlaps the front fender b3a. If necessary, the fixed position of the rear fender b3b can be moved in the rotation direction to change the rear end position of the rear fender b3b, or the rear fender b3b can be completely removed from the front fender b3a. I have.

[0004]

As described above, in the above-mentioned conventional rear fenders, since both cover the left and right sides and the outer periphery of the rear wheel e2, the splash largely scatters outward. Although the original function of the rear fender can be obtained, it is difficult to form because the shape of the component is large and complicated,
There is a problem that the occupied volume of parts in storage etc. is large, box packing, lamination etc. becomes difficult, and furthermore, if the width and diameter of the wheel are changed, all components must be newly formed Rather, it required many costs for its manufacture and management. In particular, those shown in FIG. 14 and FIG. 15 and those shown in FIG.

[0005] The rear end position of the rear fender is variously regulated by the laws of each country. In the case shown in FIGS. 14 and 15, it can be dealt with by replacing only the rear fender b2b. In the case shown in FIG. 16, the rear fender b3b can be moved by moving the rear fender b3b.
In the method shown in FIG. 2, since the entire rear fender is formed of a single molded product, it is necessary to replace the entire part, and there is a problem that the production thereof requires a large cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and makes it possible to easily and inexpensively form component parts, and to make it possible even when the diameter and width of the rear wheel are changed. It is an object of the present invention to provide a motorcycle fender that can be easily coped with only by changing a part.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a rear fender for a motorcycle which covers an outer peripheral portion of a rear wheel of a motorcycle and is fixed to a pair of left and right swing arms supporting the rear wheel. A pair of left and right stay members fixed to each swing arm so as to protrude upward from an upper edge, and a fender body detachably fixed to upper ends of the both stay members and covering a part of the rear wheel. A chain case portion that integrally covers at least one of the stay members to cover a side of an upper portion of a chain spanned from a drive sprocket that rotates integrally with a rear wheel to a driven sprocket. The front end of the fender body is located rearward from a position vertically above the rear wheel axle and the rear end is located rearward from the rear end of the rear wheel.

According to the present invention having the above-described structure, the fender member can reliably receive the splash from the rear wheel while swinging together with the swing arm, and can be prevented from being largely scattered outward. Further, the fender body that covers the outer peripheral surface of the rear wheel and the pair of stay members that cover the left and right sides of the rear wheel are separately formed, so that the shape of each member is relatively simple. And molding can be easily performed. Further, when the width of the rear wheel or the position of the rear end portion is changed, only the fender member located between the stay members needs to be changed, and the stay member does not need to be changed. In addition, it is possible to respond at low cost, and parts management is simplified.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 11 are views showing an embodiment of the present invention. FIG. 1 is an explanatory side view showing a motorcycle to which the embodiment is applied, FIG. 2 is an explanatory side view showing an example of the embodiment, FIG. 2 is a perspective view of the one shown in FIG. 2, FIG. 4 is a view showing a stay member of the rear fender shown in FIG. 3, (a) is a plan view, and (b) is a side view. FIG. 5 is a cross-sectional view taken along line AA of FIG. 2, FIG. 6 is a cross-sectional view taken along line BB of FIG.
Is a cross-sectional view taken along the line CC of FIG. 3, FIG. 8 is a perspective view showing the fender body and the stay member shown in FIG. 2, and FIG. 9 is a state of a mounting portion of the fender body and the stay member shown in FIG. FIG. 10 is a side view showing an example when the fender body is changed in the embodiment, and FIG. 11 is a perspective view shown in FIG.

In FIG. 1, in a motorcycle 1 shown here, a frame 2 having an upper pipe 2b, a lower pipe 2c, a main frame 2d, and the like connected to a head pipe 2a forms a frame of a vehicle body. 2, the engine 3 is suspended, and front forks 5, 6 for rotatably supporting the front wheels 4 are supported on the head pipe 2a located at the front end of the frame 2 via a steering shaft. Main frame 2d located at the rear end of frame 2
A pair of left and right swing arms 8, 9 (see FIG. 2) rotatably supporting the rear wheel 7 are supported so as to be able to swing up and down about a pivot 8a.

Further, the swing arms 8 and 9 are provided with rear fenders 20 for preventing splashes from the rear wheels from being largely scattered outward. As shown in FIGS. 2 and 3, the rear fender 20 includes a left stay member 21 fixed to an upper edge of a swing arm (left swing arm) 8 located on the driven sprocket 10 rotating with the rear wheel. A right stay member 22 fixed to the upper edge of the right swing arm 9 facing the left swing arm 8 and a fender body 23 connecting between the rear ends of the stay members 21 and 22 are provided. The members 21, 22, and 23 are formed as follows. That is, as shown in FIGS. 3 to 6, the left stay member 21 has a chain case portion 21a formed at a lower portion, and projects from a rear portion of the chain case portion 21a obliquely upward and rearward. A fitting portion 21c is formed at the upper end of the arm portion 21b so as to fit with a fender body 23, which will be described later. Female screw portions 21c1, 21c1 (see FIGS. 9, 4 and 8) are formed.

Two screw insertion holes 21a1 and 21a2 are formed in the vicinity of the lower end of the chain case portion 21a (see FIG. 4 (b)). By screwing into screw holes 81a, 82a of mounting plates 81, 82 projecting from the upper end of the swing arm 8 (see FIGS. 5 and 6), the swing arm 8 is fixed along the upper edge. ing. In this fixed state, the chain case portion 21a is located beside the upper rear half portion of the chain 12 bridged between the drive sprocket 11 and the driven sprocket 10, as shown in FIG. As shown in FIGS. 5 to 7, the side and upper portions of the chain 12 are covered.

The right stay member 22 has a mounting portion 22a and an arm portion 22b similarly to the left stay member 21.
And a fitting portion 22c (see FIG. 9).
2c and the arm portion 22b are connected to the left stay member 21.
The length of the mounting portion 22 is shorter than the left stay member 21. That is, the mounting portion 22a of the right stay member 22 does not require a function as a chain case unlike the mounting portion 21a of the left stay member 21, and is omitted.

On the other hand, as shown in FIG. 7, the fender body 23 is formed to be wider than the width of the rear wheel so as to protrude left and right by a predetermined distance from the left and right sides of the rear wheel, and the outer surface thereof is gently curved. As shown in FIG. 2, it has an arc shape having a larger radius of curvature than the rear wheel from the front end 23f to the rear end 23r. As shown in FIG. 8, concave portions 23 into which the upper ends of the stay members 21 and 22 are fitted are formed on both sides of the fender body 23.
a, 23b are formed, and the recesses 23a, 23b
Are formed with two screw insertion holes 22b1 and 23b1, respectively. The female screw portion 21c1 is formed by projecting two screws 24, 25 inserted from below into the screw insertion holes 22b2, 23b2 on the back surfaces of the upper end portions 21a, 22a of the stay members 21, 22 respectively. , 22c1, and the two stay members 21, 22 and the fender body 23 are integrally fixed.

The rear fender 20 constructed as described above
In the first embodiment, the stays 21 and 22 and the fender body 23 are integrally fixed to the motorcycle 1 as described above, and then the swing arm 8 is attached to the mounting plate 8.
This is performed by fixing both stay members 21 and 22 to the first and second members 82. In this mounting state, the front end 23f of the fender body 23 is located behind the position P1 vertically above the axle of the rear wheel 5, and the rear end 23r is located behind the rear end position P2 of the rear wheel 5 (see FIG. 2). ). For this reason, the splash from the rear wheel 5 is received by the fender body 23 and does not scatter greatly outward. Further, the rear fender in this embodiment is divided and formed by three members, that is, the stay members 21 and 22 constituting the side surface portion and the fender body 23 constituting the peripheral surface portion. Is to be exhibited.
Therefore, molding processing can be performed efficiently, for example, the mold opening / closing stroke during molding can be reduced.

Further, in the rear fender 20 of this embodiment, even if the width or diameter of the rear wheel 5 mounted on the motorcycle 1 or the position of the rear end of the rear fender 20 is changed, the change is also made. Can be easily handled. That is, in the conventional rear fender, when the above-described change is made, it is necessary to newly manufacture all the components of the rear fender in accordance with the change. In this case, only the fender main body 23 needs to be changed, and the stay members 21 and 22 do not need to be changed at all. Therefore, it is possible to easily cope with the change and the cost is greatly reduced.

For example, the position of the rear end of the rear fender is
When it is necessary to make a change to project downward from that shown in FIG. 3, instead of the fender body 23 described above,
A fender body as shown in FIGS. 10 and 11 may be provided. The fender body 21 shown in FIGS.
Reference numeral 22 denotes a rear end portion 23r of the fender body 23 extending downward in accordance with the curvature thereof, and the other configuration, that is, the shape of the concave portion is the same as that shown in FIGS. . Therefore, the attachment and detachment of the fender body 33 in this example can be easily performed by attaching and detaching the screw 24 as in the case of the fender body 23. In FIGS. 10 and 11, the fender body used when changing the position of the rear end of the rear fender is shown.
When changing the width and diameter of the wheel, it is sufficient to use a fender whose width or radial dimension is changed, and in this case, the stay member does not need to be changed, so that it is possible to easily cope with it. .

[0018]

As described above, in the rear fender according to the present invention, a pair of stay members and a fender main body that cover the left side surface and the right side surface are formed separately, so that the shape of each member is changed. Can be relatively simplified. For this reason, molding can be easily performed, and parts can be transported and stored efficiently. Further, when the diameter, width, and position of the rear end of the rear wheel are changed, only the fender member located between the stay members needs to be changed, and the stay member does not need to be changed. It is easy and inexpensive,
Management of parts is also greatly simplified.

[Brief description of the drawings]

FIG. 1 is an explanatory side view showing a motorcycle to which an embodiment of the present invention is applied.

FIG. 2 is an explanatory side view showing an example of the embodiment.

FIG. 3 is a perspective view of what is shown in FIG.

4A and 4B are diagrams showing a stay member of the rear fender shown in FIG. 3, wherein FIG. 4A is a plan view and FIG. 4B is a side view.

FIG. 5 is a sectional view taken along line AA of FIG.

FIG. 6 is a sectional view taken along line BB of FIG.

FIG. 7 is a cross-sectional view taken along line CC of FIG.

FIG. 8 is a perspective view showing a fender main body and a stay member shown in FIG. 2;

FIG. 9 is a longitudinal rear view showing a state of a mounting portion of the fender main body and the stay member shown in FIG. 8;

FIG. 10 is a side view showing an example when the fender body is changed in the embodiment.

11 is a perspective view of what is shown in FIG.

FIG. 12 is a side view showing a rear fender of a conventional motorcycle.

FIG. 13 is a longitudinal rear view of the one shown in FIG.

FIG. 14 is a side view showing another example of the rear fender of the conventional motorcycle.

FIG. 15 is an exploded perspective view of what is shown in FIG.

FIG. 16 is a side view showing another example of the rear fender of the conventional motorcycle.

[Explanation of symbols]

 Reference Signs List 1 motorcycle 5 rear wheel 8,9 swing arm 10 drive sprocket 11 driven sprocket 12 chain 20 rear fender 21 stay member 21a1 chain case 23 fender body 23f front end of fender body 23r rear end of fender body P1 rear wheel axle vertical position P2 Rear wheel rear end position

Claims (1)

[Claims] 1. A motorcycle that covers an outer peripheral portion of a rear wheel of a motorcycle,
A rear fender for a motorcycle fixed to a pair of left and right swing arms supporting a rear wheel, a pair of left and right stay members fixed to each swing arm so as to protrude upward from an upper edge of the swing arm, A fender body detachably fixed to upper end portions of the both stay members and covering a part of a rear wheel, wherein at least one of the both stay members includes a drive sprocket that rotates integrally with a rear wheel. A chain case portion that covers the upper side of the chain spanned by the driven sprocket is integrally formed, and the fender body has a front end located rearward from a position vertically above the rear wheel axle and a rear end located rearward. A rear fender for a motorcycle, which is located behind a rear end of the wheel.