JPS58200023A - Autobicycle - Google Patents

Abstract

PURPOSE:To prevent mud to be splashed about by a front wheel from adhering to a radiator, by making at least the lower part of a baffle plate located in front of a radiator to be arranged at a position being displaced to either of both sides of a center line of a body of an autobicycle at right angle with a tangent which touches an external circumference of the rear part of the front wheel. CONSTITUTION:A radiator 40 is providd on the rear of a steering head pipe 12 of an autobicycle at a position displaced on both sides of a center line of a car body. A plurality of baffle plates 52 is provided in front of the radiator 40, the lower face of at least a lower half 52B of the baffle plates 52 is made to incline so that it is met at about right angles with a tangent (C) which touches an external circumference of the rear part of a front wheel 26.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorcycle having a radiator provided behind a steering head pipe so as to be offset laterally from the center of the vehicle body.

Water-cooled engine? In motorcycles equipped with this system, the radiator used to cool the engine's cooling water is placed behind the front wheel or in front of the steering head pipe. There is also a vehicle in which the radiator is located behind or diagonally below the steering head vibration, particularly in a position offset from the center of the vehicle body in the left-right direction. When riding such a motorcycle on rough terrain, even if the front wheels have mud flaps that prevent mud from splashing up, mud will splash up from the sides of the mud flaps.

Therefore, this mud tends to adhere to the front surface of the radiator, especially the lower part of the front surface. When mud adheres to the radiator like this,
The cooling performance of the radiator deteriorates and the engine output decreases, causing problems such as engine overheating.

The present invention was developed in view of the above circumstances, and prevents the mud thrown up by the front wheels from adhering to the radiator, resulting in a decrease in the cooling performance of the radiator, overheating of the engine, and a decrease in output due to overheating. The purpose is to provide a motorcycle that is less prone to accidents.

In order to achieve this object, the present invention provides a motorcycle having a radiator disposed at a position offset to the left and right from the center of the vehicle body behind the steering head pipe. a louver consisting of a baffle plate, at least a lower part of the baffle plate,
It is configured to be mounted substantially perpendicular to the tangent line that touches the rear outer periphery of the front wheel. The present invention will be described in detail below based on the illustrated embodiments.

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged view of the main part thereof, and FIGS. 6 and 4 are a plan view and a front view of the main part. In these figures, reference numeral 10 denotes a semi-cradle type frame, and this frame 10 includes a steering head vibe 12, a main pipe 14 extending rearward from the head pipe 12, a down tube 16 extending rearward and obliquely downward, and the like. Reference numeral 18 denotes a rear arm having a substantially triangular side surface, the front end of which is supported by a pivot shaft on the frame 10, and the rear wheel 20 being held at the rear end.

22 is a cushion unit that supports the rear wheel 20 and the rear arm 18 so as to be movable up and down. 24 is head vibe 1
A front fork 2 is rotatably held in the left-right direction, and 26 is a front wheel held at its lower end. In FIG. 1, the full rebound position of the longitudinal axes 20) and 26 is shown by a solid line, and the full bump position is shown by a phantom line. 28 is a seat, 30 is a rear guard, and 32 is a front mudguard attached to the front fork 24.

34 is a fuel tank, which is attached so as to straddle the main pipe 14. A four part 36 is formed on the front left side of the tank 34.

38 is a water-cooled engine mounted on the frame 10, 40
is a radiator. As is clear from FIG. 4, the radiator 40 is made vertically long, and is connected to the main pipe 14 and down tube 16 so that its upper part is located at the fourth part 66 of the fuel tank 34 and its lower part protrudes downward from the tank 34.
It is fixed to That is, the radiator 40 is mounted at a position offset to the left of the vehicle body center line A (see FIG. 6.4) behind the head pipe 12. Engine 38 includes a water pump 42 . Cooling water cooled in the radiator 40 is guided to the water pump 42 by a water pipe 44. Also, this water pump 42 is ll! 1. The cooling water that comes out passes through each part of the engine filter 8 and is heated, and then passes through the water pipe 46.
is guided to the upper part of the radiator 40. Further, a side plate 48 is fixed to the left side of the upper part of the radiator 40.

50 is a louver. The louver 50 includes a large number of air guide plates 52 arranged laterally in the left-right direction, and the radiator 40
It is installed so that it is located in front of the Among the many baffle plates 52, the upper half 52A is mounted substantially horizontally as shown in FIG. Further, the lower half baffle plate 52B is installed obliquely so that its front edge is located in the −L direction than the rear edge, and therefore the lower half baffle plate 52B
The lower surface of B is approximately perpendicular to the tangent C that contacts the rear outer periphery of the front wheel 26 at point B. That is, in Fig. 2, the angle θ is approximately 90
becomes 0.

Next, the operation of this embodiment will be explained. While driving, the cooling water heated by the engine 38 is transferred from the water vibrator 46 to the radiator 4.
Flows into 0. While flowing down inside the radiator 40, the cooling water is cooled by the running wind, passes through the water tube 44, and flows back to the engine 38.

When driving on rough ground such as muddy ground, the front wheels 26 kick up mud and muddy water. This mud and sewage are blown away in the tangential direction of the front wheels 26. Due to the front wheel 26 swinging to the left or right, the front wheel 26
The mud and muddy water thrown up by the front mudguard 32 does not necessarily hit the front mudguard 32, but also flies upward from the left and right sides of the mudguard 62. A portion of this mud and muddy water flies in the direction of the radiator 40 and hits the air guide plate 52 of the louver 50. Since the lower half air guide plates 52B are substantially perpendicular to the tangent line C, mud is difficult to enter between the air guide plates 52B.

In other words, when mud hits the horizontal wind guide plate 52, the mud hits the wind guide plate 5.
The mud flows backward (towards the radiator 40) along the lower surface of the air guide plate 52B, and the mud deeply enters between the air guide plates 52.According to this embodiment, the mud hits the air guide plate 52B at a substantially right angle, and the kinetic energy of the mud is reduced. The air guide plate 5 hits the air guide plate 52B and is absorbed.
It is difficult to go deep between 2B.

Figures 5.6.7 are a side view, a plan view, and a front view of main parts in another embodiment. Louver 50 in this embodiment
A includes three wind guide plates 52a arranged vertically. The front edge of the baffle plate 52c is inclined so as to spread toward the side of the vehicle body, and the front surface of the baffle plate 52c and the tangent line C to the front wheel 26 are approximately perpendicular to each other as shown in FIG. In other words, in Fig. 6, the angle θ
becomes almost a right angle. Note that in FIGS. 5 to 7, the same parts as in FIGS. 1 to 4 are given the same reference numerals, so the description thereof will not be repeated.

According to this embodiment, mud and muddy water adhering to the air guide plates 52,c flow down along the air guide plates 52c due to gravity and vibration, so that the louvers 50A are less likely to be clogged with mud.

In the present invention, the desired effect can be obtained even if only the lower part of the baffle plate is substantially orthogonal to the tangent to the front wheel.

As described above, in the present invention, at least the lower part of the air guide plate of the louver is made to be substantially perpendicular to the tangent to the rear of the front wheels, so that mud and muddy water thrown up by the front wheels hit the air guide plate at a substantially right angle. For this reason, the kinetic energy of mud and muddy water is sufficiently absorbed when it hits the baffle plates, so mud does not penetrate deeply between the baffles along the baffle plates, and mud does not fall off due to vibrations while driving. easy.

It's also easy to clean.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2.6.4 is a side view ζ plan view and front view of the main parts, and Fig.
．． FIG. 7 is a side view, a plan view, and a front view of main parts of another embodiment. 12°"°Head pipe, 26...Front wheel, 40...
Radiator, 50.50A... Louver, 52.52a.
...Air guide plate, A...Car body center line, C...Tangential line. Patent Applicant Yamaha Motor Co., Ltd. Representative Patent Attorney Yama 1) Moon Yu 1-'

Claims (1)

[Claims] A motorcycle having a radiator disposed at a position offset to the left and right from the centerline of the vehicle body behind a steering head pipe, comprising a louver made of a plurality of substantially parallel air guide plates attached to the front surface of the radiator, A motorcycle characterized in that at least the lower part of the wind guide plate is mounted so as to be substantially perpendicular to a tangent line touching the rear outer periphery of the front wheel.