JP2003072617A - Headlight for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively guide traveling wind to an engine and the like, to reduce parts count, and to lower an installing position of a headlight. SOLUTION: A headlight 41 is disposed at a front end of an upper cowl covering a motorcycle body from a front part to a side part of the vehicular body. An exposed portion A downwardly exposed without being covered by the upper cowl is provided on a lower surface of the headlight 41. An inclining portion 50 downwardly inclining toward a rear part is formed on a rear portion of the exposed portion A. The inclining portion 50 is formed by increasing the thickness of a member. By the inclining portion, traveling wind passing under the headlight 41 is guided to an engine, a radiator, and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle headlight, and more particularly to a motorcycle headlight that is integrally attached to a front end of a fairing.

[0002]

2. Description of the Related Art In some motorcycles, a fairing is attached so as to cover the vehicle body from the front to the sides in order to reduce running resistance and improve appearance. In such a motorcycle, the engine, radiator, and the like arranged below the vehicle body are covered with the fairing. Therefore, special measures may be taken to utilize the running wind for cooling the engine and the like.

For example, in the motorcycle disclosed in Japanese Patent Laid-Open No. 11-238405, an opening is provided below a headlight arranged at a front end of a ferring so as to be directed to an engine arranged behind the headlight. The opening is used as a passage for introducing the traveling wind, and a flap configured as a member different from the fairing and the headlight is provided in the passage for introducing the traveling wind. In such a motorcycle, the traveling wind is taken in through the opening below the headlight, and the traveling wind is positively guided to the engine or the like by using the flap to cool the engine or the like.

[0004]

By the way, the above-mentioned conventional motorcycle has the following problems. That is, the flap provided in the middle of the passage for introducing the traveling wind,
Since the member is different from the fairing and the headlight, the number of parts is increased, so that the number of mounting steps is increased and the weight is increased. In addition, even if the front fork is shrunk to the maximum extent, the flap should be installed at a certain distance from the front fender so that the flap does not hit the front fender that covers the front wheels. There is also a problem that the mounting position of the headlight has to be set at a position higher than the position, and as a result, the mounting position of the headlight becomes high.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to not only actively guide the traveling wind to the engine etc., but also to introduce the traveling wind for cooling the engine. (EN) It is possible to reduce the number of parts related to, and to provide a motorcycle headlight that can be mounted at a low position.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a headlight of a motorcycle, which is arranged at a front end of a fairing covering the body of the motorcycle from the front to the side of the motorcycle, has a lower surface. Is exposed downward without being covered by the fairing, and an inclined portion that inclines downward as it goes rearward is formed on the exposed lower surface (claim 1). The inclined portion may be formed by increasing the member thickness toward the rear (Claim 2), and further, in the headlight casing for accommodating the bulb therein, and in the front portion of the headlight casing. A headlight lens to be arranged may be provided, and the inclined portion may be provided at a joint portion of the headlight casing and the headlight lens or in the vicinity thereof (claim 3).

According to the motorcycle headlight of the present invention, the lower surface is exposed downward without being covered by the fairing, and the exposed lower surface is formed with an inclined portion that inclines downward as it goes backward. The inclined portion guides the traveling wind flowing under the headlight to the engine or radiator side. That is, the slanted portion provided integrally with the headlight is used as a flap, whereby the traveling wind is positively guided to the engine side and cooled.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a motorcycle according to the present invention will be described below with reference to the accompanying drawings. In the description, directions such as front and rear and left and right are based on the direction with respect to the vehicle body. FIG. 1 shows a side view of a motorcycle 1.

This motorcycle 1 has a body frame 2 and
A pair of left and right front forks 3 rotatably supported on the front end of the body frame 2, and these front forks 3
A pair of left and right bar handles 4 for steering attached to the upper end of the vehicle body and arranged at the upper part of the front of the vehicle body; front wheels 5 rotatably supported by a front fork 3;
An engine 6 supported by the engine 6, a radiator 7 arranged in front of the engine 6, a rear fork 8 supported by the rear end of the engine 6 and the body frame 2 so as to be vertically swingable, and a rear fork 8 of the rear fork 8. A rear wheel 9 rotatably supported at a rear end portion, a fuel tank 10 arranged at an upper portion of the vehicle body frame 1, and a passenger seat arranged behind the fuel tank 10 on which a driver and a passenger sit. 11, 12
And the steps 13 and 14 for the driver and passengers, and the fairing 15 covers almost the entire vehicle body. A screen 15a made of a transparent material is arranged above and above the bar handle 4.

The body frame 2 is a head pipe 1 at the front end.
6, a pair of left and right main frames 17 integrally formed with a front engine hanger 17a and a rear engine hanger 17b, which are divided into left and right from the head pipe 16 and extend rearward and obliquely downward, and extend forward and backward downward. ,
A pair of left and right upper pipes 18a and a lower pipe 18 which are respectively connected to the rear ends of the main frames 17 and extend rearward and obliquely upward and whose rear ends are welded to each other.
and a seat rail 18 made of b.

The engine 6 is provided with a cylinder block 22 having a cylinder head 21 and a crankcase 23 continuously provided under the cylinder block 22, and a plurality of cylinders (in the left-right direction) are provided in the cylinder block 23. It is a parallel multi-cylinder 4-cycle engine in which cylinders are arranged in parallel. In the engine 6, the front portion of the cylinder block 22 is the front engine hanger 17a of the main frame 17, and the rear upper portion of the crankcase 23 is the main frame 17 with the cylinder block 22 slightly tilted forward. It is supported by the vehicle body frame 2 by being bolted to the engine hanger 17b at the rear end.

An exhaust pipe 25 is connected to the front of the cylinder block 22 for each cylinder (only one is shown in the figure). Exhaust pipes 2 of them
5 extends downward from the connection end to the cylinder block 22 and is aligned below the engine 6, and further bends and extends rearward along the lower surface of the crankcase 23,
On the lower rear side of the crankcase 23, they are combined into a single collecting pipe 26. And this collecting pipe 26
It is arranged along the right side of the rear wheel 9 while standing diagonally to the right rear.

The rear fork 8 has a base 3 at the front end thereof.
A pair of left and right fork portions 31 extends rearward from 0, and the base portion 30 is pivotally supported by a pivot 6A provided at the rear end portion of the engine 6, whereby the pivot 6
It is possible to swing vertically about A. A rear cushion unit 32 is interposed between the base portion 30 of the rear fork 8 and the rear end of the main frame 17,
As a result, the vibrations that the rear wheel 7 receives from the road surface is absorbed and absorbed. A rear fender 33 is attached to the upper portion of the fork portion 31 to cover the front upper portion of the rear wheel 9.

The fairing 15 comprises a front cowl 36 which covers the vehicle body from the front to the side and a rear cowl 37 which covers the rear portion of the vehicle body below the fuel tank 10 and the passenger seats 11 and 12. Further, the front cowl 36 is divided into an upper cowl 36a that covers the front of the vehicle body around the head pipe 16 and an under cowl 36b that covers the auxiliary components of the engine 6 sideways and below them.

As shown in FIGS. 2 and 3, the upper cowl 36a is arranged at a predetermined position by being attached to a stay (not shown) extending from the body frame 2, and the rear mirror 39 is provided on the upper side. And a mounting hole for mounting the winker 40 in a protruding state is formed on the lower side. Further, an opening portion 36aa is provided in the center of the front portion of the upper cowl 36a, and a headlight 41 is provided in the opening portion 36aa, and as shown in FIGS. The mounting portion 41a is fitted to the mounting portion 36ab of the upper cowl 36a, and is fixed by an appropriate fixing means such as a screw, so that the mounting portion 41a is integrated with the upper cowl 36a. Further, an opening is formed between the upper cowl 36a to which the headlight 41 is attached and the front fender 42 which covers the upper portion of the front wheel 5,
Running wind inlet 43 that guides the running wind into the front cowl 36
It has become.

The headlight 41, as shown in FIG.
It comprises a headlight casing 45 and a headlight lens 46 made of a transparent resin material that covers the front of the headlight casing 45, and the headlight casing 45 is formed with the plurality of attachment portions 41a. In addition, a fitting portion 41 of the headlight casing 45 and the headlight lens 46
Reference symbol a has a seal structure that protects the bulb 47 and the reflection plate 48 housed in the headlight 41 from rainwater, dust and the like.

Here, as shown in FIG. 5, in the headlight 41, there are a total of five valves including two left and right position valves 47a, one central low beam bulb 47b, and two left and right high beam bulbs 47c. Is stored. Further, the reflection plate 48 for supporting the central low beam bulb 47b and the left and right high beam bulbs 47c, respectively,
A well-known beam position adjusting mechanism can adjust the respective tilt angles in the vertical direction and the horizontal direction.

The center of the lower surface of the headlight 41 is not covered by the upper cowl 36a but is exposed downward through an opening 36ac provided in the lower surface of the upper cowl 36a (see FIG. 3). In addition, an inclined portion 50 that inclines downward as it goes rearward is formed at a rear portion of the lower exposed portion A of the headlight 41. Then, the traveling wind introduced from the traveling wind introduction port 43 is turned obliquely downward and rearward by the inclined portion 50 to be guided to the rear radiator 7 and the engine 6.

The inclined portion 50 is the headlight casing 4
5 and the headlight lens 46 near the mating portion 41a, specifically, the headlight lens 4 of the mating portion 41a.
It is formed on the 6 side by increasing the thickness of a part of the member forming the headlight lens 46.

Further, as shown in FIG. 2, a convex portion 51 is formed at the front end of the headlight lens 46, and the convex portion 51 is formed.
To the upper screen 15a through the front part of the upper cowl 36a to form a continuous inverted triangular convex portion 52 (this portion is indicated by a dot in FIG. 2).

Next, the operation of the motorcycle 1 will be described. According to the motorcycle 1, the headlight 41 is provided so that its lower surface is exposed to the lower side without being covered with the fairing 15, and the rearward portion of the lower exposed portion A of the headlight 41 is inclined to the lower side as it goes rearward. 50 is formed, and the traveling wind introduction port 4 is formed by the inclined portion 50.
The traveling wind introduced below from 3 and flowing under the headlight 41 is guided to the radiator 7 and the engine 6 side obliquely downward and rearward. That is, the inclined portion 50 formed on the headlight 41
Is used as a flap to change the direction of the running wind,
This inclined portion 50 positively guides the traveling wind to the engine 6 side and the like to cool the engine 6. Therefore,
Despite being covered with the fairing 15, the engine 6 can be cooled appropriately.

Further, since the inclined portion 50 is provided integrally with the headlight 41 which is originally attached to the fairing 15 without using a separate flap member or the like,
The number of parts can be reduced, and the number of mounting steps and weight can be reduced accordingly. Further, as compared with the case where a separate flap member is interposed between the fairing 15 and the front fender 42, the mounting position of the upper cowl 36a to which the headlight 41 is assembled can be lowered.
Therefore, the projected area of the front of the vehicle body can be reduced, and
Air resistance during traveling can be reduced.

Since the inclined portion 50 is formed by increasing the thickness of the member toward the rear, the rigidity of the inclined portion 50 is higher than the other portions.
Here, an unstable load that changes every moment due to the direct impact of the traveling wind is applied to the inclined portion 50. If the rigidity of the inclined portion 50 is low, vibration or noise may be generated, but in this embodiment, since the inclined portion 50 has high rigidity, such a problem may occur. Can be prevented.

Further, the inclined portion 50 is a joint portion 4 of the headlight casing 45 and the headlight lens 46.
It is provided in the vicinity of 1a, specifically, on the side of the headlight lens 46, and the mating portion 41a is a portion where the openings of both members 45 and 46 are butted to each other, and is a relatively weak portion. Since the inclined portion 50 is reinforced by providing the inclined portion 50 as described above, it is possible to prevent cracking or deformation of the mating portion 41a. Furthermore, since the thick inclined portion 50 is formed in the vicinity of the mating portion 41a, there is an advantage that it can be easily formed.

Further, in this embodiment, from the convex portion 51 at the front end of the headlight lens 46 to the upper cowl 36.
a Further, since an inverted triangular convex portion 52 is formed over the screen 15a, the three members 4
Since 6, 36a and 15a are united to exert a good rectifying action, the air resistance during traveling can be further reduced.

The above-described embodiment is merely an example of the invention, and the design can be changed as necessary. For example, in the embodiment described above, the inclined portion 5
Although 0 is formed on the headlight lens 46 side, the invention is not limited to this, and the inclined portion 50 may be formed on the headlight casing 45 side.
The members 45, 4 of both of them are joined to the mating portion 41a of 5, 46.
You may form so that it may straddle 6.

[0027]

According to the motorcycle headlight of the first aspect of the present invention, the number of parts can be reduced because the inclined portion is formed integrally with the headlight without using a separate flap member or the like. Therefore, the number of mounting steps can be reduced and the weight can be reduced. Further, as compared with the case where a flap member or the like is separately used, the mounting position of the fairing for assembling the headlight can be lowered, and therefore, the projected area of the front surface of the vehicle body can be reduced, thereby reducing the air resistance during traveling. .

According to the motorcycle headlight of the second aspect, since the inclined portion is formed by increasing the thickness of the member toward the rear, the rigidity of this inclined portion is higher than that of other portions. Therefore, it is possible to prevent the inclined portion, which is directly hit by the traveling wind, from vibrating and generating a vibration noise accompanying it.

According to the motorcycle of the third aspect, the inclined portion is provided at or near the joint between the headlight casing and the headlight lens, and the joint is a portion where the openings of both members are butted. Although it is a part that is relatively weak in terms of strength from the beginning, the rigidity is increased by increasing the thickness of the inclined part, so it is possible to prevent cracking or deformation from the mating part. .

[Brief description of drawings]

FIG. 1 is an overall side view of a motorcycle showing an embodiment of the present invention.

FIG. 2 is a plan view of an upper cowl to which a headlight is attached in the motorcycle.

FIG. 3 is a bottom view of the upper cowl in which the headlight is assembled in the motorcycle.

FIG. 4 is a side view of the headlight.

FIG. 5 is a front view of the headlight.

FIG. 6 is a sectional view of a headlight.

[Explanation of symbols]

1 ... Motorcycle 2 ... Body frame 4 ... Bar handle 6 ... Engine 15 ... Fairing 15a ... Screen 36 ... Front cowl 36a ... Upper cowl 36aa ... Opening 36b ... Under cowl 37 ... Rear cowl 41 ...... Headlight 41a …… Mating part A …… Headlight bottom exposed part 42 …… Front fender 43 …… Running wind inlet 45 …… Headlight casing 46 …… Headlight lens 50 …… Sloping part 51 …… Convex part 52 …… Convex part

Claims (3)

[Claims] 1. A headlight for a motorcycle, which is disposed at a front end of a fairing covering the front of the motorcycle and laterally covering the same, wherein a lower surface of the headlight is exposed downward without being covered by the fairing. A headlight for a motorcycle, characterized in that an inclined portion that is inclined downward as it goes rearward is formed on the exposed lower surface. 2. The headlight for a motorcycle according to claim 1, wherein the inclined portion is formed by increasing the member thickness toward the rear. 3. A headlight casing for accommodating a bulb therein, and a headlight lens arranged at a front portion of the headlight casing, wherein the slanted portion includes the headlight casing and the headlight lens. The headlight for a motorcycle according to claim 2, wherein the headlight is provided at the fitting portion or in the vicinity thereof.