JP2002302082A - Cowling structure for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a front side cowl to be covered with a rear side cowl, for example, make an inside hardly viewed, and allow a large wind introducing port to be formed for cooling of a silencer and to cool the silencer sufficiently, as a result thereof. SOLUTION: A cowling 100 is dividable in a front position of the silencer 70, a recess 112 recessed toward the body center is formed in a rear end of a middle cowl 111 (front side cowl), a front face opening part 122 is formed in a front end of a lower cowl 121 (rear side cowl), and the front face opening part 122 and the recess 112 are put together to form the large wind introducing port 123 for cooling the silencer 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cowling structure for a motorcycle.

[0002]

2. Description of the Related Art As a motorcycle cowling structure, for example, Japanese Utility Model Publication No. Hei 2-10071, "Motorcycle with Cowling" is known. According to FIGS. 2 and 3 of the publication, the traveling wind intake 71 and the traveling wind introduction guide 72 are integrally provided on the bottom side surface 49 of the under cowling 47. This is a motorcycle with a cowling that actively cools the exhaust pipe 32 and the expansion chamber 33 by introducing traveling wind from the vehicle.

[0003]

However, in the motorcycle with a cowling described above, if the traveling air intake 71 is formed large, a portion surrounded by the under cowling 47 may be easily visible. If the traveling air intake 71 is not sufficiently large, predetermined traveling air cannot be guided to the exhaust pipe 32 and the expansion chamber 33, and the exhaust pipe 32 and the expansion chamber 33 may not be efficiently cooled. .

It is an object of the present invention to provide a motorcycle cowling structure capable of opening a sufficiently large air guide port for a cowling and sufficiently guiding traveling wind.

[0005]

According to a first aspect of the present invention, there is provided a motorcycle cowling structure in which an engine is disposed between front and rear wheels, and a silencer is disposed below the engine. In a motorcycle whose side is also surrounded by a cowling, the cowling can be divided at the position ahead of the silencer, a recess is formed at the rear end of the front cowl toward the center of the vehicle, and a front opening is formed at the front end of the rear cowl. The large opening for cooling the silencer is formed by combining the front opening with the depression.

For example, it is preferable from the viewpoint of environmental protection to cool a silencer or the like of a motorcycle by using the traveling wind, since only the natural traveling wind needs to be utilized. Therefore, the cowling is formed so as to be splittable into the front cowl and the rear cowl at the forward position of the silencer, and a hollow is formed at the rear end of the front cowl toward the center of the vehicle body, and a front opening is formed at the front end of the rear cowl. To form Then, the hollow at the rear end of the front cowl is aligned with the front opening of the rear cowl to form a cylindrical air guide port.

[0007] That is, by matching the front opening with the recess, for example, the front cowl can be covered with the rear cowl, and the inside can be made difficult to see. As a result, a large air inlet can be formed for cooling the silencer, and the silencer can be sufficiently cooled.

According to a second aspect of the present invention, a side portion of the crankshaft of the engine is covered with a cover member, a flange portion is formed around the cover member, and the cover member and the flange portion are collectively exposed from the cowling. It is characterized by the following. The side of the crankshaft of the engine is covered with a cover member, a flange is formed around the cover member, and the cover member and the flange are collectively exposed from the cowling, so that the area of the cowling is reduced. Is formed small. As a result, it is possible to produce a light design by making the cowling look small.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that "before", "after",
“Left”, “right”, “up”, and “down” follow directions seen from the driver. Also, the drawings should be viewed in the direction of reference numerals.

FIG. 1 is a side view of a motorcycle employing a cowling structure according to the present invention, and shows an appearance of a motorcycle 10. The motorcycle 10 includes a front wheel 32 attached to a front portion of the body frame 20 via a front fork 31, a rear wheel 34 attached to a rear portion of the body frame 20 via a swing arm 33, and a lower longitudinal center portion of the body frame 20. , An air cleaner 53, a fuel tank 55, and a seat 56 attached to an upper portion of the longitudinal center of the body frame 20.

The present invention relates to a series connection between front and rear wheels 32 and 34.
While the engine 40 of the cylinder is arranged,
Is characterized in that a silencer 70 is disposed below.
The silencer 70 is connected to the vehicle body frame 20 or the engine 40.
It will be attached to.

The cowling 100 of the motorcycle 10
The front cowl 101 covers the upper part of the front part of the vehicle body, the left and right middle cowls 111 (only the right side is shown in this figure; the same applies hereinafter) that covers the middle part of the vehicle body, and the left and right parts cover the lower part of the vehicle body and the side surfaces of the silencer 70 Lower cowl 121 and a rear cowl 131 surrounding the rear of the vehicle body.

The front cowl 101, the left and right middle cowls 111, and the left and right lower cowls 121 are splitably connected to each other by screws. More specifically, the cowling 100 allows the upper front part of the left and right middle cowls (front side cowl) 111 to be able to be divided with respect to the lower part of the front cowl 101, and at the front position of the silencer 70, the lower rear end of the middle cowl 111. In contrast, the front end of the lower cowl (rear cowl) 121 can be divided.

The front cowl 101 has a wind screen 102 at an upper portion and a pair of left and right air intake ports 103 at a front portion. Further, a recess 112 is formed at the lower rear end of the middle cowl (front cowl) 111 toward the center of the vehicle body, and a front opening 122 is formed at the front end of the lower cowl (rear cowl) 121.
A large air guide port 123 for cooling the silencer 70 can be formed by combining the recess 112 with the recess 112.

Further, FIG. 2 shows that a rear fender 140 disposed below the rear cowl 131 is attached to the swing arm 33. According to the present invention, the lower edge 132 of the rear cowl 131 is inclined substantially linearly rearward and upward, and the upper surface 141 of the rear fender 140 is moved to the lower edge 132 of the rear cowl 131.
Characterized in that it is inclined substantially linearly rearward and upward so as to be parallel to.

In the figure, reference numeral 47 denotes an engine crankshaft;
Is a cover member (crankshaft cover), 91 is a handle,
92 is a mirror, 93 is a headlamp, 94 is a turn signal,
95 is a front fender, 96 is a rear cushion unit, and 97 is a cushion link. The rear part of the silencer 70 extends to the vicinity of the cushion link 97.

FIG. 2 is a perspective view of a main part of an intake / exhaust system structure mounted on a cowling structure of a motorcycle according to the present invention.
The intake system 51 of the motorcycle 10 includes a pair of left and right air intake ports 103 provided on the front cowl 101 shown in FIG.
A pair of left and right air ducts (intake ducts) 52, 52 extending rearward from the air suction ports 103, and an air cleaner 5 connected to the ends of the air ducts 52, 52.
3 The air cleaner 53 is connected to the body frame 20.
Are arranged between a pair of left and right main pipes 21 and 21. 22 is a head pipe.

The engine 40 is a four-cylinder engine in which four exhaust ports 41 to 44 are arranged in one row on the left and right at an upper front part, and has an oil pan 45 at a lower rear part. Motorcycle 1
The exhaust system 58 is a device that exhausts exhaust gas through an exhaust pipe 60 extending from the exhaust ports 41 to 44 of the engine 40 and a silencer 70 connected to the exhaust pipe 60.

As the silencer 70, a type in which a gas outlet 74 is provided near the gas inlet 73 is employed. Silencer 7 with gas inlet 73 facing rear wheel 34
0 is arranged below the engine 40 and the exhaust pipe 60 is connected to the gas inlet 73 of the silencer 70 in a state of extending to the vicinity of the rear wheel 34.

Here, regarding the four exhaust ports, the first exhaust ports 4 are arranged in this order from the left side of the vehicle body (the right side in the figure) to the right side.
1, second exhaust port 42, third exhaust port 43, fourth exhaust port 44
Say The exhaust pipe 60 includes four pipes (a first pipe 61, a second pipe 62, a third pipe 63 and a fourth pipe 64), and three collecting pipes (a first collecting pipe 65, a second collecting pipe 66, and a third pipe). Collecting cylinder 67).

The first pipe 61 having one end connected to the first exhaust port 41 extends to the lower right, and further extends rearward while passing through the right side of the oil pan 45. Similarly, the second exhaust port 42
The second pipe 62 having one end connected to the oil pan 45 also extends to the lower right, and further extends rearward while passing through the right side of the oil pan 45. Then, the other end of the first pipe 61 and the other end of the second pipe 62 are connected to a first collecting cylinder 65 to be collected into one. The first collecting cylinder 65 extends rearward while passing through the right side of the oil pan 45, and further extends leftward.

On the other hand, the third pipe 63 having one end connected to the third exhaust port 43 extends downward and leftward, and further extends rearward while passing through the left side of the oil pan 45. Similarly, the fourth pipe 64, one end of which is connected to the fourth exhaust port 44, extends to the lower left, and then extends rearward while passing through the left side of the oil pan 45. Then, the other end of the third pipe 63 and the fourth pipe 6
By connecting the other end of 4 to the second collecting cylinder 66, they are collected into one. The second collecting cylinder 66 extends rearward while passing through the left side of the oil pan 45.

Further, by connecting the other end of the first collecting cylinder 65 and the other end of the second collecting cylinder 66 to the third collecting cylinder 67,
Gather together. Thus, the four pipes 61 to 6
4 can be combined into one third collecting cylinder 67. Then, the third collecting cylinder 67 extends rearward and is connected to the gas inlet 73.

FIG. 3 is a plan sectional view of a silencer employed in the motorcycle cowling structure according to the present invention. The silencer 70 has a tubular tubular portion 71 that is elongated and closed in the front and back.
A gas inlet 73 and a gas outlet 74 provided at a rear end portion 72 of the tubular portion 71; and a first partition plate 78 and a second partition plate 7 that partition the inside of the tubular portion 71 into three expansion chambers 75 to 77 in the longitudinal direction.
9

In this manner, the rear end 72
The first expansion chamber 75, the second expansion chamber 76, and the third expansion chamber 77 can be provided in this order from the front (to the right in this figure). The first expansion chamber 75 communicates with the gas inlet 73, the third expansion chamber 77 communicates with the first expansion chamber 75 via a first communication pipe 81, and the second expansion chamber 76 communicates with the third expansion chamber 77. 82
, The gas outlet 74 is connected to the second expansion chamber 76 by the third communication pipe 83, and the tail pipe 84 is connected to the gas outlet 74. Exhaust gas is supplied to the first, second and third expansion chambers 75 to 7
The exhaust sound can be attenuated by the expansion effect when the vehicle enters the position 7.

FIG. 4 is a perspective view from the front of the cowling showing the cowling structure of the motorcycle according to the present invention. As described above, 111 is a middle cowl as a front cowl, 112 is a depression of the middle cowl 111, 121 is a lower cowl as a rear cowl, 122 is a front opening, 123
Are the air guide holes formed by the depressions 111 and the entire opening 122;
Reference numerals 24 ... (... denote a plurality of characters; the same applies hereinafter) are set screws for fixing the lower cowl 121 to the vehicle body frame 20 (see FIG. 1).

FIG. 5 is a perspective view from the side of the cowling showing the cowling structure of the motorcycle according to the present invention. That is, in the motorcycle cowling structure according to the present invention, the engine 40 is disposed between the front and rear wheels 32, 34 (see FIG. 1), the silencer 70 is disposed below the engine 40, and the left and right side surfaces of the silencer 70 Also cowling 10
In the motorcycle 10 surrounded by 0, the cowling 100
Can be divided at the forward position of the silencer 70, a recess 112 is formed at the rear end of the middle cowl 111 (front cowl) toward the center of the vehicle body, and a front opening 122 is formed at the front end of the lower cowl 121 (rear cowl). Is formed, and the front opening 122 and the depression 112 are combined to form the silencer 7.
It can be said that a large air inlet 123 for cooling is formed.

For example, a motorcycle 10 utilizing the traveling wind
Cooling the silencer 70 and the like (see FIG. 1) is preferable from the viewpoint of environmental protection because it is only necessary to use natural traveling wind. Therefore, the cowling 100 is formed so as to be able to be divided and divided into the middle cowl 111 and the lower cowl 121 at a position ahead of the silencer 70, and the hollow 1 recessed toward the center of the vehicle body at the rear end of the middle cowl 111.
12 and a front opening 1 at the front end of the lower cowl 121.
22 is formed. Then, the dent 112 at the rear end of the middle cowl 111 and the front opening 122 of the lower cowl 121 are aligned to form the wind guide port 123.

That is, the front opening 122 and the depression 112
By matching with, for example, lower cowl 12
1, the middle cowl 111 can be covered, and the inside can be made hard to see. As a result, a large air inlet 123 can be formed for cooling the silencer 70,
The silencer can be sufficiently cooled. Also, the side of the crankshaft 47 of the engine 40 is
8 (cover member), a flange portion 48a is formed around the cover member 48, and the crankshaft cover 48 and the flange portion 49 are collectively
By exposing the cowling 100 (see FIG. 1), the area of the cowling 100 is reduced. As a result, by making the cowling 100 look small, a design with a light feeling can be produced.

FIG. 6 is a side view of a rear fender employing a motorcycle cowling structure according to the present invention. For example, the design of the motorcycle 10 is improved by adding a function other than the mudguard to the rear fender 140. If it is possible, it is preferable that the design of the motorcycle can be made new. Therefore, the rear fender 140 has the lower edge 132 of the rear cowl 131 inclined substantially linearly rearward and upward, and the upper surface of the rear fender 140 has substantially linearly inclined upward and rearward parallel to the lower edge 132 of the rear cowl 131. Indicates that In the figure, 35 is a rear wheel axle, 36 is a pivot axle, 142 is a rear fender 14
0 shows the protrusion formed.

That is, the rear fender structure of the motorcycle is such that the rear part of the motorcycle is surrounded by a rear cowl 131, and a rear rear fender 140 disposed below the rear cowl 131 is attached to the swing arm 33.
The lower edge 132 of the rear cowl 131 is inclined substantially linearly rearward and upward, and the upper surface of the rear fender 140 is
This can be said to be substantially linearly inclined rearward and upward so as to be parallel to the lower edge 132 of the first.

In the rear fender structure of the motorcycle, the upper surface of the rear fender 140 is inclined substantially linearly rearward and upward so as to be parallel to the lower edge 132 of the rear cowl 131.
It is possible to improve the flow of the traveling wind between zero and above. As a result, a downforce is generated in the rear fender 140, and the effect of a rear spoiler that holds down the rear wheel 34 can be added. Further, by adding the effect of the rear spoiler to the design of the motorcycle 10, the design of the motorcycle 10 can be improved.

Further, by providing the rear fender 140 with the protruding portion 142 protruding rearward from the rear wheel axle 35, the appearance design can be improved.

The swing arm 33 is provided with a rear cushion unit 96 substantially at the center of the vehicle body and between the vehicle body frame 20 (see FIG. 1) and the upper end of the rear cushion unit 96 is connected to the upper part of the swing arm 33. By connecting the upper end of the rear cushion unit 96 to the lower portion of the vehicle body frame 20, for example, a space between the rear wheel 34 and the rear cowl 131 can be opened. As a result, traveling wind can be drawn around the rear fender 140, and the rear fender 140 can exhibit the effect of the rear spoiler.

Further, by opening the side of the rear fender 140, the traveling wind can be drawn into the side of the rear fender 140, and the rear fender 140 can exhibit the effect of the rear spoiler.

In the embodiment, as shown in FIG. 5, the air inlet 123 is formed by aligning the front opening 122 with the depression 112. However, the depression 112 extends to the rear of the vehicle body, and In a duct shape. The cooling efficiency of the silencer can be improved by forming the air guide opening into a duct shape.

[0037]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, the cowling can be divided at the forward position of the silencer, a recess is formed at the rear end of the front cowl toward the center of the vehicle body, and a front opening is formed at the front end of the rear cowl. Since the opening and the depression are matched, by matching the front opening with the depression,
For example, the front cowl can be covered with the rear cowl, and the inside can be made hard to see. As a result, a large air inlet can be formed for cooling the silencer, and the silencer can be sufficiently cooled.

According to a second aspect of the present invention, the side portion of the crankshaft of the engine is covered with a cover member, a flange is formed around the cover member, and the cover member and the flange are collectively exposed from the cowling. Because
Reduce the cowling area. As a result, it is possible to produce a light design by making the cowling look small.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle employing a cowling structure according to the present invention.

FIG. 2 is a perspective view of a main part of an intake / exhaust system structure mounted on a cowling structure of the motorcycle according to the present invention.

FIG. 3 is a plan cross-sectional view of a silencer employed in a motorcycle cowling structure according to the present invention.

FIG. 4 is a front perspective view of a cowling showing a cowling structure of a motorcycle according to the present invention.

FIG. 5 is a side perspective view of the cowling showing the cowling structure of the motorcycle according to the present invention.

FIG. 6 is a side view of a rear fender employing a cowling structure of a motorcycle according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 32 ... Front wheel, 34 ... Rear wheel, 40 ... Engine, 47 ... Crankshaft, 48 ... Cover member (crankshaft cover), 48a ... Flange part, 70 ... Silencer, 100 ... Cowling, 111 ... Front cowl (Middle cowl), 112: hollow, 121: rear cowl (low cowl), 121: front opening, 123: wind guide port.

Claims (2)

[Claims] 1. A motorcycle in which an engine is arranged between front and rear wheels, a silencer is arranged below the engine, and right and left side surfaces of the silencer are also surrounded by cowlings. The cowling can be divided at a forward position of the silencer. A recess is formed at the rear end of the front cowl toward the center of the vehicle body, a front opening is formed at the front end of the rear cowl, and the front opening is combined with the recess to cool the silencer. A motorcycle cowling structure characterized by forming a large airflow opening. 2. The engine according to claim 1, wherein a side portion of the crankshaft of the engine is covered with a cover member, a flange is formed around the cover member, and the cover member and the flange are collectively exposed from the cowling. A motorcycle cowling structure characterized by the following.