JPH08142956A - Motorcycle mudguard structure - Google Patents

Abstract

(57) [Summary] [Purpose] Even in a motorcycle equipped with an oil cooler or radiator near the head pipe and relatively above the vehicle, and equipped with an under cowl, the design and function of the under cowl are maintained. Without compromising
To provide a mudguard structure for a motorcycle capable of exerting a sufficient mudguard effect. [Structure] A mudguard structure 1 for a motorcycle has a closing plate extending rearward of the vehicle near the lower end of the oil cooler or the like in order to close a clearance 26 between the lower end of an oil cooler or a radiator 22 and the cylinder head 20a. 28 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mudguard structure for a motorcycle. More specifically, the present invention relates to a mudguard structure for a motorcycle, which prevents mud or muddy splashed up by the front wheel of the motorcycle from entering the engine side.

[0002]

2. Description of the Related Art In a vehicle of a motorcycle in which a radiator or an oil cooler is mounted relatively below the vehicle, the engine side of mud or muddy water (hereinafter referred to as "mud") splashed from the front wheels. The invasion toward the is prevented by the radiator itself and the like interfering with it.

However, as shown in FIG. 9, in the motorcycle c having a structure in which the radiator a is mounted near the head pipe b and is mounted relatively above the vehicle, the radiator a and the engine d are separated. Cylinder head d
_Since there is a wide clearance between the clearance ₁ and the clearance e, the mud and the like of the front wheel f is easily intruded through the clearance e.

In order to prevent this, it is conceivable to extend the front fender g downward, but even in that case, in a motorcycle equipped with the under cowl h, there are restrictions on the design and function of the under cowl h. Therefore, the front fender g cannot be simply extended downward.

Therefore, the mud or the like from which the front wheel f is splashed up is scattered after hitting the under cowl h, and as a result, the mud or the like is ignited by the ignition coil i, the carburetor j and the cylinder as shown by the white arrow in FIG. There was a problem that the head d ₁ was also caught.

[0006]

SUMMARY OF THE INVENTION The mudguard structure of a motorcycle according to the present invention is intended to solve the above problems. The problem to be solved is that a radiator or an oil cooler is mounted near the head pipe. Even if it is a motorcycle that is mounted relatively above the vehicle and is equipped with an under cowl, it is possible to achieve a sufficient mudguard effect without impairing the design and function of the under cowl. It is to provide a mudguard structure.

[0007]

Means for Solving the Problems The mudguard structure for a motorcycle according to the present invention achieves the above objects and is as follows. That is, the mudguard structure of the motorcycle of the present invention has a radiator or oil cooler mounted near the head pipe and mounted relatively above the vehicle, with the cylinder head, ignition coil and carburetor of the engine disposed behind the radiator and oil cooler. In a motorcycle equipped with a cowl, a closing plate extending rearward of the vehicle is provided near the lower end or the lower end of the radiator or oil cooler in order to close a gap between the lower end of the radiator or oil cooler and the cylinder head. It exists in the mudguard structure of a motorcycle characterized by.

[0008]

Therefore, according to the mudguard structure of the motorcycle of the present invention, the clearance formed between the lower end of the radiator or oil cooler and the cylinder head is closed at or near the lower end of the radiator or oil cooler. Since the closing plate extending to the rear of the vehicle is provided, mud and muddy water splashed up by the front wheels of the motorcycle are prevented from moving toward the cylinder head, the ignition coil and the carburetor by the closing plate. Therefore, it is not necessary to extend the front fender downward to prevent the entry of mud or the like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mudguard structure 1 for a motorcycle according to the present invention will be described below in detail with reference to the drawings in accordance with the illustrated embodiments. FIG. 1 is a mudguard structure 1 for a motorcycle according to the present invention.
FIG. 2 is a side view of a motorcycle 2 in which FIG. 2 is adopted, FIG.
3 is an enlarged perspective view of an essential part of FIG. 2, FIG. 4 is a front view of a closing plate 28 as a mudguard plate according to a mudguard structure 1 of a motorcycle according to the present invention, and FIG. 5 is a plan view of the same. 6 is the same side view,
FIG. 7 is a sectional view taken along line VII-VII of FIG. 4, and FIG. 8 is a view showing a modified example 1A of the mudguard structure of the motorcycle according to the present invention.

As shown in FIG. 1, the motorcycle 2 has:
The skeleton is a body frame 4 starting from the head pipe 3 and extending rearward from the vehicle. And the body frame 4
A front fork 8 that rotates left and right by operating a handle 6 attached to the head pipe 3 is attached to a front portion of an upper frame 4a located above the front fender 9a.
A front wheel 9 whose upper part is covered with is rotatably attached via a cushion unit 10.

The range from the front part to the central part of the body frame 4 is covered with a full cowling 16 composed of an upper cowl 12 and an under cowl 14. The upper cowl 12 covers the periphery of the headlamp 18, and the under cowl 14 covers the engine 20 (see FIG. 2) covered by the under cowl 14 from the left and right sides and from below, respectively. The frame 4 is attached to the down tube 4b, the under tube 4c, a main tube (not shown), and the like via appropriate attachment means. Then, the upper cowl 12 and the under cowl 14 are detachably connected to each other at a joint portion 16a through an appropriate screw means.

In this way, the upper cowl 12 and the under cowl 14 can be separated from each other because when the both members 12 and 14 are assembled to the vehicle body frame 4 from the beginning, the size is increased. This is because the general user can select a desired design according to his / her wishes, though it is also considerably heavy and the assembly efficiency is poor. However, as a matter of course, it is possible to assemble the upper cowl 12 and the under cowl 14 and then sell the assembled assembly in the factory.

In the full cowling 16, an oil cooler 22 is mounted near the head pipe 3 in the front portion of the full cowling 16 so that the oil cooler 22 is relatively above the vehicle. It can be attached to. The cylinder head 20a of the engine 20, the ignition coil 23, the carburetor 24, and the like are arranged behind the oil cooler 22.

A portion of the front surface 4b ₁ of the down tube 4b near the lower end of the oil cooler 22 has a mudguard plate extending rearward of the vehicle to close a clearance 26 between the lower end of the oil cooler 22 and the cylinder head 20a. A closing plate 28 is provided.

The closing plate 28 is made of metal or resin, and as seen from FIGS. 3 and 6, when it is attached to the vehicle, it is substantially L-shaped when viewed from the side and extends in the vehicle width direction. Are doing Specifically, the closing plate 28
Is extended vertically and the down tube 4b is
A support plate portion 28a for fixing to the vehicle body frame 4. Accordingly closing plate 28 itself is supported through a bolt 27, 27 as screwed means in front 4b ₁ of the gap 26 together with horizontally extending vehicle rearward Block board 2 that actually closes
8b and. In addition, reference numeral 30.3 shown in FIGS.
Reference numeral 0 is a through hole through which the screwing means 27, 27 are passed. After applying the through holes 30, 30 to the mounting holes provided in the down tube (not shown), the bolts 27, 27 are passed through these holes, and illustration is omitted. If it is screwed with a nut,
Are fixed to the down tube 4b.

It is to be noted that one end 28A ₁ of the closing plate 28A formed by forming the entire closing plate 28 into a plate shape as shown in FIG. 8 may be screwed to the lower end surface of the oil cooler 22 with a bolt 29. Alternatively, the closing plate 28 may be integrally formed as a part of the oil cooler from the beginning. In short,
Any structure may be used as long as it can close the gap 26.

In the mudguard structure 1 for such a motorcycle, however, the closing plate portion 28b of the closing plate 28 closes the gap 26 between the lower end of the oil cooler 22 and the cylinder head 20a. The front surface 9 of the motorcycle 2 prevents the mud or the like from bouncing up toward the cylinder head 20a, the ignition coil 23, and the carburetor 24.

Therefore, it is not necessary to extend the front fender 9a downward to prevent the entry of mud or the like.
There is no restriction on the design or function of the under cowl 14, and yet it is possible to exert a sufficient mudguard effect.

Further, the closing plate portion 28b has the oil cooler 2
Since it also plays a role as a guide plate that guides the exhaust heat from 2 toward the rear, a smooth rearward flow of the exhaust heat can be expected. Then, the clearance plate 26 between the lower surface of the oil cooler 22 and the cylinder head 20a is closed to close the plate portion 2
Since 8b is installed, the smallest mudguard plate can be obtained. In a motorcycle equipped with a radiator, a closing plate 28 may be provided at or near the lower end of the radiator instead of the oil cooler. Further, the vicinity of the lower end vicinity here means
As long as the closing plate 28 can function as a mudguard plate.

[0020]

According to the present invention, a sufficient mudguard effect can be exhibited without any restrictions on the design and function of the under cowl.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a motorcycle adopting a mudguard structure for a motorcycle according to the present invention.

FIG. 2 is an enlarged view of an essential part showing a state in which a full cowling is removed from FIG.

FIG. 3 is an enlarged perspective view of a main part of FIG.

FIG. 4 is a front view of a closing plate as a mudguard plate related to the mudguard structure of the motorcycle according to the present invention.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view of the same.

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

FIG. 8 is a view showing a modified example of the mudguard structure of the motorcycle according to the present invention.

FIG. 9 is a diagram showing a conventional technique.

[Explanation of symbols]

 1 Mudguard structure of motorcycle 2 Motorcycle 3 Head pipe 14 Under cowl 20 Engine 20a Cylinder head 22 Oil cooler (radiator) 23 Ignition coil 24 Carburetor 26 Clearance 28 Closure plate

Claims (1)

[Claims] 1. A motorcycle in which a radiator or oil cooler is mounted in the vicinity of a head pipe and is mounted relatively above the vehicle, and an engine cylinder head, an ignition coil and a carburetor are arranged behind the radiator and an under cowl is mounted. A mud of a motorcycle characterized in that a closing plate extending rearward of the vehicle is provided near the lower end or the lower end of the radiator or oil cooler in order to close the gap between the lower end of the radiator or oil cooler and the cylinder head. Evade structure.