JPH0631048B2 - Motorcycle cowling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cowling device for a motorcycle, which covers the engine from the front side to the left and right sides.

[Conventional technology]

In recent years, for the purpose of protecting the driver from wind pressure and rain, and reducing air resistance of the vehicle body, a motorcycle in which a cowling is integrally covered from the front upper part of the front fork to the periphery of the engine has been used for general driving. It is becoming popular as a commercial vehicle.

This type of cowling is equipped with an upper cowl that integrally covers from around the headlamp to the upper side of the front fork, and an under cowl that continuously covers the engine surroundings on the lower parts of both sides of the upper cowl. , Each of which is integrally molded with a synthetic resin material.

The conventional under cowl has left and right side panel portions that laterally cover the engine cylinder, and the rear edge portions of these side panel portions extend to positions just before the legs of the driver.

Further, the lower end portions of the side panel parts wrap around the lower part of the engine and are abutted against each other, and an exhaust pipe extending downward from the front of the engine to the rear part is inserted inside the lower end parts of the side panel parts. ing.

[Problems to be Solved by the Invention]

However, according to the cowling having the above configuration, the cooling air that has flowed into the under cowl from the front cools around the cylinder, and then flows backward through the space between the cylinder and the side panel portion, and from the rear end of the under cowl to the rear. You will get out.

However, since the trailing edge of the side panel is located immediately before the driver's leg, the cooling air that has become hot hot air by cooling around the cylinder is directly guided to the driver's leg. , Especially in the summer when the outside temperature is high,
The driver may feel hot.

Moreover, since the high temperature exhaust pipe is also inserted and arranged inside the under cowl, the hot air of the exhaust pipe is easily trapped in the under cowl, which also contributes to raising the temperature of the hot air.

The present invention has been made based on such circumstances, and it is possible to suppress the thermal influence on the driver to a small extent,
An object of the present invention is to provide a cowling device for a motorcycle in which a comfortable driving environment can be obtained and the exhaust pipe is not restricted by the under cowl.

[Means for Solving the Problems]

In order to achieve the above object, the present invention covers an upper front part of a front fork and extends downward from the left and right rear parts of the upper cowl that extends rearward through the left and right outer sides of the front fork. Is
The engine has an upright cylinder and covers both left and right sides, and is provided with an under cowl that continuously wraps around to the lower side of the engine, and an exhaust pipe extending from the front of the engine to the rear through the lower side is inserted inside the under cowl. It is based on the motorcycle cowling device.

The under cowl is located on both left and right sides of the cylinder, and has a pair of side panel portions extending to the rear of the cylinder. The rear cowl faces the inner edge of the side panel portion at the rear edge portion of the side panel portions. And the leg shield located in front of the driver's leg is integrally provided, and the lower end of the side panel portion is connected to each other only in front of the exhaust pipe at the front end thereof. Is also characterized in that a gap is formed in the rear portion so that the exhaust pipe projects below the under cowl.

[Action]

According to this configuration, the gap between the side panel portion and the cylinder is covered from behind by the leg shield of the side panel portion, so that the cooling air flowing between the side panel portion and the cylinder is protected by the leg shield. Guided inside. For this reason, it is possible to prevent the cooling air, which has become a high temperature hot air by cooling around the cylinder, from being blown out toward the legs of the driver, and it is possible to suppress the thermal influence on the driver to a small extent.

In addition, since the lower end of the under cowl has a gap through which the exhaust pipe projects, hot air in the exhaust pipe escapes to the outside of the under cowl through the gap, and the exhaust pipe is directly cooled by the outside air. For this reason, it becomes difficult for the hot air of the exhaust pipe to be trapped inside the under cowl, which is convenient for suppressing the thermal influence on the driver.

Further, since the exhaust pipe projects below the under cowl from the gap, the routing of the exhaust pipe is not restricted by the presence of the andal cowl.

〔Example〕

The present invention will be described below based on an embodiment shown in FIGS. 1 to 4.

FIG. 1 shows a motorcycle, in which reference numeral 1 is a frame, 2
Is a front fork, 3 is a front wheel, 4 is an air-cooled 4-cycle 4-cylinder engine, 5 is a seat, and 6 is a rear wheel.

The engine 4 includes a cylinder block 9 and a cylinder head 10 which are upright on a crankcase 11. Four exhaust pipes 32 are provided on the front surface of the cylinder head 10.
Are connected. These exhaust pipes 32 are guided rearward from the front of the cylinder block 9 through the lower part of the crankcase 11.

A carburetor 48 is arranged behind the cylinder block 9 and the cylinder head 10.
8 is located below the front end of the seat 5.

A cowling 7 made of synthetic resin according to the present invention is attached to the frame 1. This cowling 7
This is a full cautal type that integrally covers from around the head lamp 8 located in the front upper part of the front fork 2 to around the cylinder block 10, the cylinder head 10 and the crankcase 11 of the engine 4. The structure of the cowling 7 will be described.

That is, reference numeral 12 is an upper cowl, and the upper cowl 12 is divided into a left panel 12a and a right panel 12b which are symmetrical with each other. This upper cowl 12
Covers the sides of the front of the fuel tank (not shown) and the surroundings of the headlamp 8. The heads of the left panel 12a and the right panel 12b are abutted in front of the front fork 2 at the lower edges of the front ends thereof. An abutment wall 13 that covers the lower side of the lamp 8 is integrally extended.

A hood 14 is screwed between the upper portions of the left panel 12a and the right panel 12b, and the hood 14 covers the upper side of the headlamp 8. A headlamp rim 15 having a quadrangular frame shape is attached to the substantially quadrangular opening surrounded by the front end portions of the upper cowl 12 and the hood 14. The headlamp rim 15
It surrounds the front periphery of the front lens 16 of the headlamp 8.

A transparent windscreen 17 is provided on the upper surface of the hood 14.
Are overlaid. The wind screen 17 has resin screws inserted into the overlapping portion of the front end both sides and the hood 14, and is tightened with a nut from the back side.
It is fixed to the hood 14. The rear end side of the wind screen 17 extends to a position substantially above the handle 18 in a smooth curve.

Left and right rearview mirrors 19 are provided on both sides of the rear end of the hood 14 so as to project laterally. For this reason, the rearview mirror 1 is provided on both left and right sides of the windscreen 17.
A notch 20 is provided to allow the stay portion 9 to escape.

Brackets 22 having left and right flancia lamps 21 are fixed to both sides of the front end of the windscreen 17. This bracket 22 is for the windscreen 17
The head of the screw that joins the hood 14 and the hood 14 is covered and hidden.

The meter hood 23 is provided at the rear end opening of the hood 14.
A meter panel (not shown) including a tachometer and a speedometer is attached to the meter hood 23.

On the other hand, the upper edges of the rear ends of the left panel 12a and the right panel 12b that form the upper cowl 12 extend from the rear portions of the left and right flasher lamps 21 to the side of the front portion of the fuel tank, passing under the grip 24 of the handle 18. Panels 26 each having a storage box 25 are attached to the extended portions.

Further, the portions of the left panel 12a and the right panel 12b that are located behind the front fork 2 cover from the front of the fuel tank to the vicinity of the upper portion of the cylinder head 10 of the engine 4 from the side, and between the front end portions thereof. An oil cooler cover 29 that covers the periphery of the oil cooler 28 is attached to the.

An under cowl 30 that covers the periphery of the engine 4 is continuously provided below the up cowl 12. The under cowl 30 includes a pair of left and right side panel portions 30a, 3a.
It has 0b. These side panel parts 30a, 30
b has a symmetrical shape and is arranged on both sides of the engine 4. For this reason, the front end portion of the under cowl 30 has a cooling air introduction port 31 opening to the front surface of the engine 4.
Are formed.

Lower front ends of the side panel portions 30a and 30b extend to the front of the crankcase 11 and the exhaust pipe 32, and a lead-out portion 33 extending below the exhaust pipe 32 is integrally provided in the extended portion. A fin-shaped front panel portion 34 is hung between the front end portions of the lead-out portions 33. The front panel portion 34 is located below the cooling air introduction port 31, and is provided with the crankcase 11 and the exhaust pipe 3.
It crosses the front of 2 to the left and right, and substantially covers the lower part of the front end of the engine 4 and the exhaust pipe 32 from below.

From this, the lower end portions of the left and right side panel portions 30a, 30b are connected to each other only at their front end portions, and the portion behind the front panel portion 34, which is the connecting portion, is clear from FIG. As described above, a gap 30c that is separated rightward and leftward and opens below the engine 4 is formed between them. Then, as shown in FIG. 1, an exhaust pipe 32 passing below the crankcase 11 is projected below the under cowl 30 through the gap 30c.

The front panel section 34 and the side panel sections 30a, 3
The joint position with 0b, that is, the seam 37 is located on the left and right edges of the front panel portion 34, as shown in FIG.

The front portions of the left and right side panel portions 30a and 30b are largely cut out on the sides of the cylinder block 9 and the cylinder head 10 of the engine 4. Cutout 35
Is connected to the cooling air inlet 31 and the notch 3
A part of the cylinder block 9 and the cylinder head 10 is exposed to the side of the cowling 7 through 5.

As shown in FIG. 2, the side panel portions 30a and 30b are inclined with a smooth curvature so as to project to the side of the engine 4 as it goes rearward of the engine 4. The rear edge portions of the side panel portions 30a and 30b are connected to the rear edge portions of the left panel 12a and the right panel 12b of the upper cowl 12. Then, the side panel portions 30a, 30b and the left and right panels 12a, 1
As shown in FIGS. 3 and 4, a leg shield 38 extending toward the inside of the cowling 7 is integrally formed at the rear end edge of 2b.

The leg shield 38, as is clear from FIG. 3,
The gap between the cylinder block 9 and the cylinder head 10 of the engine 4 and the side panel portions 30a and 30b is closed from the rear side, and is located just in front of the driver's legs. Therefore, the leg shield 38 includes the cylinder block 9, the cylinder head 10, and the side panel portion 3.
The cooling air from the front flowing between 0a and 30b is guided inward, and the blowing of the cooling air to the legs is blocked.

It should be noted that the side panel portions 30a and 30b are provided with through holes 40 that are located below the notches 35 and into which the crankcase cover 39 is inserted.

The part from the fuel tank to the lower part of the front end of the seat 5 is covered with a pair of body covers 41 that can be disassembled to the left and right sides. Above the front end of these body covers 41,
A top plate portion 42 that is abutted above the fuel tank and covers the upper surface of the fuel tank is integrally provided. At the abutting edge of the top plate portion 42, the tank cap 43 of the fuel tank
An escape recess 44 is formed so as to penetrate therethrough. And
A tank cap cover 46 that covers the tank cap 43 is openably and closably mounted between the upper surfaces of the top plate portions 42 via a bracket 45, and a tank pad 47 is continuous behind the tank cap cover 46. It is installed.

Therefore, the abutting portion of the top plate portion 42 is covered by the tank cap cover 46 and the tank pad 47.

Further, as shown in FIG. 1, a portion of the body cover 41 located below the seat 5 is extended downward to a rear space portion of the carburetor 48 and the engine 4, that is, a back stay 49 of the frame 1 and a seat (not shown). A substantially triangular space surrounded by the pillar tube is laterally covered, and an inspection window 50 is opened at a portion facing the carburetor 48.

Further, at the rear end portion of the body cover 41, a tail cowl 51 that covers the lower rear periphery of the seat 5 is continuously provided. A tail lamp 52 is integrally embedded in the rear end surface of the tail cowl 51.

According to such a configuration, the side panel portions 30a, 3 that cover the cylinder block 9 and the cylinder head 10 from the side.
0b and the trailing edge portions of the panels 12a and 12b continuous with the leg shield 38 are integrally formed with the leg shields 38 extending inwardly, so that the side panel portions 30a and 30b and the cylinder block 9 and the cylinder head 10 are not connected. The gap is closed in front of the driver's leg.

Therefore, while the motorcycle is traveling, the side panel portion 3 is
The traveling wind from the front flowing between 0a, 30b and the cylinder block 9 and the cylinder head 10 is guided by the leg shield 38, and the flow direction thereof is changed to the inward direction.

Therefore, the cylinder block 9 and the cylinder head 10
The surrounding air is cooled and becomes high-temperature hot air, and the cooling air does not directly blow out from the rear ends of the side panel portions 30a and 30b toward the legs of the driver, and the heat influence on the driver is reduced accordingly. It can be suppressed and a comfortable driving environment can be obtained.

Further, the lower end portions of the side panel portions 30a and 30b are connected only at their front end portions by the front panel portion 34,
A portion behind the front panel portion 34 forms a gap 30c that is open toward the lower side of the engine 4 without being abutted with each other.
The lower part of is opened directly below the engine 4.

Therefore, even though the exhaust pipe 32 is inserted inside the under cowl 30, the hot air of the exhaust pipe 32 can escape to the outside of the under cowl 32 through the gap 30c.

Moreover, since the exhaust pipe 32 passing below the engine 4 is projected through the gap 30c of the under cowl 30, the exhaust pipe 32 is directly cooled by the outside air flowing outside the under cowl 30.

Therefore, in addition to the hot air of the exhaust pipe 32 escaping through the gap 30c, the exhaust pipe 32 is placed inside the under cowl 30.
It becomes difficult for the hot air to be trapped, which is convenient for suppressing the heat effect on the driver.

At the same time, when the exhaust pipe 32 is passed between the lower end of the under cowl 30 and the engine 4, the exhaust pipe 32 can be made to project below the lower end of the under cowl 30 through the gap 30c. Therefore, there is an advantage that the arrangement of the exhaust pipe 32 is not restricted by the presence of the under cowl 30.

〔The invention's effect〕

According to the present invention described in detail above, the high-temperature cooling air flowing between the cylinder and the side panel portion can be guided to the inside of the under cowl by the leg shield. Therefore, the high-temperature cooling air does not blow out toward the legs of the driver, and the heat effect on the driver is suppressed to that extent, and a comfortable driving environment can be obtained.

Further, only the front end of the lower end of the side panel portion is connected, and the portion behind the connecting portion has a gap that opens downward of the engine without being abutted against each other. Hot air in the exhaust pipe can escape to the outside of the under cowl through the gap. At the same time, since the exhaust pipe is projected below the under cowl through this gap, this exhaust pipe is directly cooled by the outside air flowing outside the under cowl, and the hot air in the exhaust pipe can be escaped from the above gap. The hot air in the exhaust pipe is less likely to be trapped in the under cowl, and in this respect as well, the thermal effect on the driver can be suppressed.

Moreover, since the exhaust pipe can be made to project below the lower end portion of the under cowl, there is an advantage that the handling of the exhaust pipe is not restricted by the presence of the under cowl.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a side view of a motorcycle, Fig. 2 is a front view of the motorcycle, Fig. 3 is a plan view of the motorcycle, and Fig. 4 is cowling. It is a perspective view which decomposes | disassembles and shows. 2 ... front fork, 4 ... engine, 7 ... cowling, 9 ... cylinder block, 10 ... cylinder head, 12 ... upper cowl, 30 ... under cowl,
30a, 30b ... side panel portion, 30c ... gap,
32 ... Exhaust pipe, 38 ... Leg shield.

Claims (1)

[Claims] 1. An upright cylinder that covers the front of the upper part of the front fork and extends rearward through the left and right outer sides of the front fork, and extends downward from the rear parts on the left and right sides of the upper cowl. And an under cowl that continuously wraps around to the lower side of the engine while covering both left and right sides of the engine, and an inside of the under cowl is an exhaust pipe extending downward from the front of the engine to the rear of the motorcycle. A cowling device, wherein the under cowl has a pair of side panel portions located on both left and right sides of the cylinder and extending to the rear of the cylinder, and a side panel portion is provided at a rear edge portion of the side panel portions. The leg shield that extends toward the inside of the vehicle and is located in front of the driver's legs At the same time, the lower ends of the side panel parts are connected to each other only at the front end part in front of the exhaust pipe, and at the rear part of the connecting part, there is a gap for projecting the exhaust pipe below the under cowl. A cowling device for a motorcycle characterized by being formed.