JP5053021B2 - Motorcycle cowl structure - Google Patents

Description

  The present invention relates to a cowl structure for a motorcycle including a front cowl that covers a front portion of a vehicle body.

Some motorcycles include a front cowl that covers the front of the vehicle body. This type of cowl (also referred to as fairing) extends from the front of the vehicle body to the rear and is located on the side of the vehicle body. The lower part of the rear half surrounds the upper and rear sides of the engine and opens the front and sides of the engine. (For example, refer to Patent Document 1).
JP-A-57-55274

  However, the conventional cowl structure has a complicated and large shape because the lower half of the cowl (corresponding to the front side cowl located on the side of the vehicle body) is bent around the upper and rear sides of the engine. In addition, some motorcycles control a specific posture in which the vehicle body is banked inward in the turning direction at the time of turning, but there are cases where it is still insufficient to obtain a rectifying effect that is easy to bank.

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a cowl structure for a motorcycle that can obtain a straightening effect that is easy to change direction with a simple shape.

To solve the above problems, the present invention provides a cowl structure for a motorcycle having a front cowl (60) covering the vehicle body front portion, the front cowl (60) includes a front upper cowl (61 covering the vehicle body front center ) And a front side cowl (65) provided on the side of the front upper cowl (61) , and a cut portion (69) extending in the longitudinal direction of the vehicle body is provided on a side surface of the front side cowl (65) . upper front side cowl portion above the cut portion (69) is (66), projecting in the vehicle width direction outer side in front view than the lower front side cowl portion below the cut portion (69) (67), the lower The upper front side cowl portion (66) stretches in the vehicle width direction from the front to the rear of the vehicle body rather than the front side cowl portion (67). Wherein the slope of the time to is set to be larger.
According to the present invention, the side surface of the front side cowl is provided with the cut portion extending in the longitudinal direction of the vehicle body, and the upper front side cowl portion above the cut portion is viewed in front than the lower front side cowl portion below the cut portion. Because it extends to the outside in the vehicle width direction, the running wind is easier to peel off on the cowl side away from the ground contact point of the wheel, which is the center of rocking when banking, and the operating load for banking with a simple shape is kept low Can do.

In this case, the front side cowl (65) extends rearward from the front lower end of the front cowl (60) as a vertex and extends in a substantially V shape, and the cut portion (69) extends rearward from the vicinity of the vertex. The upper front side cowl (66) extends so as to cover the side surface of the fuel tank (41) supported above the vehicle body frame (11) , and the lower front side cowl part (67) extends rearward and downward. It is preferable to extend so as to cover the upper part of the engine (17) supported below the fuel tank (41) . According to this configuration, the traveling wind from the front of the vehicle body can be separated into the occupant side and the engine side with a simple shape.

In this case, the fuel tank (41) fuel tank (41) from under the rear of the seat (42) has a side cover (71) covering the vehicle body side portion of the lower, the lower front side cowl portion (67), The side cover (71) preferably extends so as to at least partially overlap. According to this configuration, it is possible to more effectively block the exhaust heat of the engine from being transmitted to the occupant.

In this case, it is preferable to provide a flip part (67C) that is bent outward in the vehicle width direction at the lower end of the lower front side cowl part (67) . According to this configuration, the running wind flowing downward along the lower front side cowl portion can be peeled off from the front side cowl to improve the rectifying effect.

In this case, it is preferable to provide a concave surface (66C) on the upper surface of the upper front side cowl portion (66) . According to this configuration, a part of the traveling wind flowing along the upper front side cowl portion can be adjusted so as not to flow to the occupant side, and the air volume to the occupant can be adjusted to improve comfort.

Further, in this case, an opening (66E) with a louver is provided on the back surface of the upper front side cowl part (66) , and the inner surface of the lower front side cowl part (67) is connected to the front side cowl (65) . It is preferable that the air sucked from the air intake duct (64) provided at the lower end of the front part is guided to the bottom of the fuel tank (41) . According to this configuration, the air inside the upper front side cowl portion can be smoothly discharged from the louvered opening and led to the occupant side, and the cooling performance of the engine and the heat shielding performance to the fuel tank can be improved.

In the present invention, the front side cowl is provided with a cut portion extending in the longitudinal direction of the vehicle body, and the upper front side cowl portion above the cut portion is a vehicle in front view than the lower front side cowl portion below the cut portion. Since it projects outward in the width direction, the traveling wind is more easily separated on the cowl side away from the ground contact point of the wheel, which is the center of rocking when banking, and the operation load for banking with a simple shape can be kept low. .
The front side cowl extends rearward from the front lower end of the front cowl in a substantially V shape, and the notch extends rearward from the vicinity of the apex, so that the upper front side cowl is supported above the body frame. Since it extends so as to cover the side of the fuel tank and the lower front side cowl extends downward and covers the upper part of the engine supported below the fuel tank, Can be distributed to the passenger side and the engine side.
Also, it has a convex side cover that covers the side of the vehicle body under the fuel tank and the seat behind the fuel tank, and the lower front side cowl portion extends so as to at least partially overlap the side cover. It is possible to effectively block the exhaust heat from being transmitted to the passenger.

In addition, a flip part that bends outward in the vehicle width direction is provided at the lower end of the lower front side cowl part, so that the running wind that flows downward along the lower front side cowl part is peeled off from the front side cowl, and a rectifying effect is achieved. Can be improved.
In addition, because the upper front side cowl part has a concave surface on the upper surface, it can be adjusted so that part of the running wind that flows along the upper front side cowl part does not flow to the occupant side, and the air volume to the occupant is adjusted. Comfort can be improved.
In addition, an opening with a louver is provided on the back surface of the upper front side cowl part, and the air sucked from the air intake duct part provided at the front lower end of the front side cowl on the inner surface of the lower front side cowl part below the fuel tank Because of the guiding shape, the air inside the upper front side cowl can be smoothly discharged from the opening with the louver and guided to the occupant side, and the cooling performance of the engine and the heat shielding performance to the fuel tank can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are for the vehicle body.
FIG. 1 is a side view of a motorcycle having a cowl structure according to an embodiment of the present invention, and FIG. 2 is a front view thereof.
As shown in FIG. 1, the motorcycle 10 includes a body frame 11, a pair of left and right front forks 13 and 13 rotatably supported by a head pipe 12 attached to a front end portion of the body frame 11, Steering handle 15 attached to top bridge 14 supporting the upper ends of forks 13, 13, front wheel 16 rotatably supported on front fork 13, engine 17 supported on body frame 11, engine 17, an exhaust muffler 19 connected via an exhaust pipe 18, a rear swing arm 21 supported by a pivot 20 at the lower rear portion of the vehicle body frame 11 so as to swing up and down, and a rear end portion of the rear swing arm 21. And a rear wheel 22 that is rotatably supported by the rear swing arm 21 and the vehicle body frame 11. 23 are disposed.

  The vehicle body frame 11 includes a main frame 31 that extends rearward from the head pipe 12 and then bends and extends obliquely downward and downward, a down tube 32 that extends downward and downward downward from the head pipe 12 to the main frame 31, and a main frame 31. And a pivot plate 33 having a pivot 20 connected to the rear portion and supporting the rear swing arm 21. Further, in the vicinity of the head pipe 12, a tension pipe 34 is bridged between the main frame 31 and the down tube 32, the first reinforcing plate 35 that connects the head pipe 12, the main frame 31, and the down tube 32, and the head A second reinforcing plate 36 for connecting the pipe 12 and the down tube 32 is provided, and thereby the rigidity of the front portion of the vehicle body frame 11 is sufficiently ensured.

  Further, a seat rail 37 is connected to the vicinity of the bent portion of the main frame 31, and the seat rail 37 is also supported by a stay 38 connected to the pivot plate 33, on the main frame 31 in front of the seat rail 37. A fuel tank 41 is supported, and a seat 42 on which an occupant sits is supported behind the fuel tank 41, that is, on a seat rail 37. Reference numerals 43 and 43 in FIGS. 1 and 2 are steps for a driver that is provided on the pivot plate 33 and is placed on the front part of the seat 42 by the driver. Reference numerals 44 and 44 are seat rails. 37 is a step that is foldable on a stay 38 that supports the seat 37, and a passenger sitting on the rear part of the seat 42 puts his / her foot. Reference numeral 45 denotes a side stand (see FIG. 1), and reference numeral 46 denotes the passenger. It is a grab rail (see FIG. 1) held by a person.

The engine 17 is supported in a space surrounded by the main frame 31 and the down tube 32, and is thereby supported below the fuel tank 41 near the front of the vehicle body. More specifically, the engine 17 includes the down tube 32. A crankcase 17A supported by a pivot plate 33 provided on the main frame 31, supported by an engine mount 47, a cylinder block 17B connected to the upper front of the crankcase 17A, and an upper portion of the cylinder block 17B And a head cover 17D connected to an upper portion of the cylinder head 17C.
The engine 17 is an air-cooled single cylinder engine, air-cooling fins are provided around the cylinder block 17B and the cylinder head 17C, and the cylinder block 17B is substantially vertical (actually slightly inclined forward) with respect to the crankcase 17A. The vertical engine to be placed is applied.

  In the cylinder block 17B, a piston is accommodated in the cylinder so as to be reciprocally movable. In the crankcase 17A, a crankshaft coupled to the piston via a connecting rod and an output shaft 17E of the engine 17 are pivotally supported. A clutch mechanism, a transmission mechanism, and the like that constitute a power transmission mechanism between the crankshaft and the output shaft 17E are housed. As shown in FIG. 1, the output shaft 17E and the rear wheel 22 are provided with sprockets 24 and 25, respectively, and the power of the engine 17 is transmitted to the rear wheel through a drive chain 26 wound around the sprockets 24 and 25. 22 is transmitted.

  An exhaust pipe 18 is connected to the front surface of the cylinder head 17C, a carburetor 28 is connected to the back surface of the cylinder head 17C via an insulator 27, and an air cleaner 29 is connected to the rear of the carburetor 28. The fuel in the fuel tank 41 is supplied to the carburetor 28, and the fuel is mixed with the air from the air cleaner 29 and supplied to the engine 17. In addition, not only the carburetor method but also an injector method may be applied.

  Further, the motorcycle 10 is provided with a vehicle body cover 50 that covers the vehicle body. The vehicle body cover 50 includes a front cowl 60 that covers the front portion of the vehicle body, a pair of left and right side covers 71 and 71 that cover the side portions of the vehicle body, A rear seat cowl 72 that covers the rear portion of the vehicle body is provided, and these are each formed of an appropriate material such as a synthetic resin. A front fender 73 that covers the front wheel 16 is attached to the front fork 13, and a rear fender 74 that covers the rear wheel 22 is attached to the rear seat cowl 72.

The side cover 71 is formed in a substantially triangular large cover that protrudes downward so as to cover the side of the vehicle body from the lower side of the fuel tank 41 to the lower side of the seat 42, and the grommet 71A is provided at a position spaced from the front end. The grommet 71A is held by the vehicle body frame 11 (main frame 31) below the fuel tank 41, and its front end and lower end are fixed to the vehicle body frame 11 (main frame 31) by screws 75 and 76. As a result, the side cover 71 covers the gaps between the main frame 31, the seat rail 37 and the stay 38, and avoids exposing the external appearance of various components (the carburetor 28 and the air cleaner 29 described above) disposed behind the engine 17. The appearance can be improved, and the running wind flowing on the side of the vehicle body can be smoothly flowed to the rear of the vehicle body by the substantially smooth surface of the side cover 71, so that the air resistance can be reduced.
Further, the rear seat cowl 72 is fixed to the seat rail 37 and extends rearward with a smooth curved shape so that the left and right sides of the seat 42 extend rearward from the vicinity of the rear edge of the side cover 71 to improve the appearance. On the other hand, the traveling wind from the front of the vehicle body can flow smoothly rearward along the rear seat cowl 72, and air resistance can be reduced.

Next, the front cowl 60 will be described in detail. The front cowl 60 includes a front upper cowl 61 that covers the center of the front of the vehicle body, and a pair of left and right front side cowls 65 that are detachably provided on the side of the front upper cowl 61 and cover the sides of the front of the vehicle body. . Here, FIG. 3 is a front view of the motorcycle 10 with the front side cowl 65 removed, FIG. 4 is a view of the motorcycle 10 as viewed obliquely from above, and FIG. 5 shows the front cowl 60 with the fuel tank 41. It is a side view shown with.
The front upper cowl 61 is fixed to the front of the head pipe 12 via a cowl stay (not shown) on the body frame 11, and a headlight 81 and a screen 82 are arranged as shown in FIG.

Specifically, as shown in FIGS. 1 to 3, the front upper cowl 61 includes a nose portion 62 that bends obliquely rearward from the front end, and nose side portions 63 and 63 that project to the left and right of the nose portion 62. An air intake duct portion 64 provided below the nose portion 62 is integrally provided.
The nose portion 62 is provided with a headlight opening 62A (see FIG. 2) for accommodating the headlight 81, and meters accommodated behind the front upper cowl 61 above the headlight opening 62A. Meter visor part 62B (see FIG. 2) is provided, and a screen 82 is attached to the front surface of the meter visor part 62B (see FIG. 2).

As shown in FIGS. 3 and 5, the nose side portions 63 and 63 are formed in a symmetrical shape, and in a side view, the nose side portions 63 and 63 have a substantially V-shape toward the rear with the side of the front lower end of the nose portion 62 as a vertex. It has a cover shape that extends and has a substantially V-shaped cross section that opens inward when viewed from the front of the vehicle body (see FIG. 3), and branches up and down on the rear side. As shown in FIG. 5, the upper side surface 63 </ b> A of the nose side portion 63 that is substantially V-shaped in cross-sectional view extends rearwardly with a relatively steep slope along the nose portion 62, and the lower side of the nose side portion 63. The side surface 63B extends rearwardly with a gentler slope than the upper side surface 63A, and as shown in FIG. 1, branches from the upper side surface 63A below the handle 15 and its upper edge is substantially horizontal toward the rear side. It is formed so as not to interfere with the handle 15 by extending.
As described above, the upper side surface 63A of the nose side portion 63 is inclined along the nose portion 62 and is formed as an inclined surface that is inclined downward toward the outside of the vehicle body when viewed from the front of the vehicle body. A passenger who sits on the seat 42 while reducing the air resistance and smoothly flowing the traveling wind from the front of the vehicle body in a slanted direction and smoothly flowing diagonally upward while reducing the foreshadow projection area. The wind which hits directly can be reduced, and a windshield effect and a rectification effect can be exhibited.

  Further, as shown in FIG. 5, the lower side surface 63B of the nose side portion 63 extends upward with a gentle inclination, so that the traveling wind from the front of the vehicle body is directed toward the upper body of the occupant seated on the seat 42. It can flow smoothly. Here, in this configuration, as shown in FIGS. 1 and 2, a pair of left and right front blinkers 83, 83 are attached to the front side of the lower side surface 63 </ b> B of the nose side portion 63. For this reason, the traveling wind flowing toward the occupant (the traveling wind toward the occupant along the lower side surface 63B) is moderately reduced by the front blinkers 83, 83. The rear blinkers 84 and 84 (see FIG. 1) are attached to the base of the rear fender 74.

  As shown in FIG. 3, the air intake duct portion 64 is located at the lower end of the front portion of the front upper cowl 61 and includes a pair of left and right ducts 64A and 64A that open toward the front. It is introduced into the space between the pair of front side cowls 65, 65.

Next, the front side cowls 65 and 65 will be described. 6A is a front view of the front cowl 60, and FIG. 6B is a cross-sectional view of the left front side cowl 65 of FIG. As shown in FIG. 6 (A), the front side cowls 65, 65 are formed in a symmetrical shape, and the front side cowl 65 on one side (the left side of the vehicle body) will be described in detail below.
As shown in FIG. 5, the front side cowl 65 is formed in a cover shape extending in a substantially V shape toward the rear with the side of the air intake duct portion 64 (that is, the front lower end of the front cowl 60) as the apex, The upper front side cowl portion 66 extending upward and the lower front side cowl portion 67 extending downward and downward is formed as an integral cover.
The upper front side cowl portion 66 and the lower front side cowl portion 67 are formed in a curved shape that gradually protrudes outward in the vehicle width direction from the apex to the rear, and vertically up and down on the front side of the fuel tank 41. Branching and extending rearward, the rear edges of these cowl portions 66 and 67 are cut out in a substantially V shape in side view so as to substantially coincide with the contour line of the recess of the knee grip portion 41A provided in the fuel tank 41. It is formed in a different shape.

More specifically, the upper front side cowl portion 66 extends rearward from the front end side of the air intake duct portion 64 toward the fuel tank 41 side, covers the front cowl 60 from the front end to the fuel tank 41 side, It bends inward in the vehicle width direction on the side of the fuel tank 41 and smoothly connects to the side surface of the fuel tank 41 (see FIG. 4).
As shown in FIG. 6B, the upper front side cowl portion 66 has an upper inclined surface (upper side surface) 66A that inclines outward in the vehicle width direction as it goes downward of the vehicle body, and goes downward of the vehicle body as viewed from the front of the vehicle body. Accordingly, it is formed in a substantially V-shaped cross section that is open to the inside and includes a lower inclined surface (lower side surface) 66B that is inclined inward in the vehicle width direction.
As shown in FIG. 5, the upper inclined surface 66 </ b> A is formed on a surface that extends rearward and upward toward the occupant seated on the seat 42, and thereby guides the traveling wind from the front of the vehicle body toward the occupant, particularly the upper body side. It can function as a wind guide surface.

Further, as shown in FIG. 6A, the vehicle body longitudinal direction is defined by the upper inclined surface 66A and the lower side surface 63B of the nose side portion 63, with the joint portion of the front upper cowl 61 and the front side cowl 65 as a boundary. A rectifying groove 68 having a V-shape in a side view extending in the direction is formed, so that traveling wind from the front of the vehicle body can be rectified by the rectifying groove 68 and smoothly flown to the rear of the vehicle body.
Further, a recessed surface 66C that is recessed in a substantially spherical shape is provided on the rear portion of the upper surface (corresponding to the upper inclined surface 66A) of the upper front side cowl portion 66. For this reason, a part of the traveling wind flowing through the rectifying groove 68 can be changed upward by the concave surface 66C, and a part of the traveling wind flowing along the rectifying groove 68 can be changed to the upper half of the occupant (shoulder portion, etc.) It can flow in a direction that does not flow to the occupant side, and instead of flowing the traveling wind toward the occupant in a spot manner, the traveling wind of an appropriate air volume can be flowed to the occupant by expanding the range up and down. In other words, in this configuration, the air volume and range of the traveling wind toward the occupant are adjusted by the front blinkers 83 and 83 disposed on the upstream side of the rectifying groove 68 and the recessed surface 66C disposed on the downstream side of the rectifying groove 68. be able to.

  In addition, an opening (louvered opening) 66E in which louvers 66D are vertically spaced apart is provided on the back surface of the lower inclined surface 66B of the upper front side cowl portion 66. For this reason, the traveling wind from the front of the vehicle body that has passed through the air intake duct portion 64 passes through the upper front side cowl portion 66 and blows backward from the opening 66E. Since an occupant seated on the seat 42 is located behind the opening 66E, it is possible to send the traveling wind toward the occupant's feet. Further, since the louver 66D is arranged, the direction of the wind blown from the opening 66E can be set appropriately.

As shown in FIG. 1, the lower front cowl portion 67 extends rearward from the front end side of the air intake duct portion 64 so as to cover the side of the space between the fuel tank 41 and the engine 17. Covering the side of the upper part (head cover 17D), the rear end overlaps the side cover 71.
As shown in FIG. 6B, the lower front cowl portion 67 faces an upper inclined surface (upper side surface) 67A that inclines outward in the vehicle width direction toward the lower side of the vehicle body as viewed from the front of the vehicle body, and the vehicle body side surface direction. A lower inclined surface (lower side surface) 67B that is inclined inward in the vehicle width direction as it goes downward of the vehicle body, and a flip portion 67C that is bent outward from the lower end of the lower inclined surface 67B in the vehicle width direction. Is done.

  As shown in FIG. 5, the upper inclined surface 67A extends in the longitudinal direction of the vehicle body, and the upper inclined surface 67A and a lower inclined surface 66B of the upper front side cowl portion 66 extend in the longitudinal direction of the vehicle body 69 ( 6A) is formed. By this cut portion 69, the traveling wind from the front of the vehicle body can be rectified in the longitudinal direction of the vehicle body and flowed backward. In addition, the cut portion 69 separates the traveling wind introduced from the air intake duct portion 64 into the front side cowl 65 into the upper front side cowl portion 66 side and the lower front side cowl portion 67 side. Is smoothly discharged from the opening (louvered opening) 66E through the space between the fuel tank 41 and the upper front side cowl portion 66, and the lower air is guided to the bottom of the fuel tank 41 to cool the engine 17. In addition, the heat of the engine 17 can be effectively blocked from being transmitted to the fuel tank 41.

  Further, since the lower inclined surface 67B is inclined toward the inner side of the vehicle body as it goes downward, the traveling wind from the front of the vehicle body can be guided to the lower side of the vehicle body and inside the vehicle body and sent to the engine 17. As a result, the running wind sufficiently flows through the cooling fins of the engine 17 to improve the cooling effect, and the running wind deprived of exhaust heat from the engine 17 flows below the vehicle body, so that the exhaust heat of the engine is not transmitted to the occupant. Can be. The exhaust heat of the engine 17 is also transmitted to the traveling wind passing between the front side cowls 65, 65. Since the front side cowl 65 and the side cover 71 are arranged so as to overlap each other, the traveling wind is directed toward the occupant. The flow is cut off, and the heat shield between the engine 17 and the occupant can be effectively performed.

Further, since the flip part 67C is provided at the lower end of the front side cowl 65, the traveling wind flowing downward along the cowl 65 can be separated from the front side cowl 65 by the flip part 67C, and the rectifying effect is improved. be able to.
Further, as shown in FIGS. 6 (A) and 6 (B), the front side cowl 65 of this configuration has an upper front side cowl that is larger than the amount of protrusion of the lower front cowl portion 67 outward in the vehicle width direction (reference numeral W1 in the figure). The protruding amount of the portion 66 (reference numeral W2 in the figure) is increased, that is, the upper front side cowl portion 66 has a slope when protruding in the vehicle width direction from the front to the rear of the vehicle body. It is set large.
As the inclination increases, the traveling wind that flows along the cowl portions 66 and 67 covering the sides of the vehicle body is more easily separated from the rear. Therefore, the upper front side cowl portion 66 is more than the lower front side cowl portion 67. The traveling wind can be peeled off.
As described above, when the traveling wind is peeled off at the cowl portions 66 and 67 covering the side of the vehicle body, the motorcycle 10 that controls the vehicle in a specific posture for banking the vehicle body in the turning direction when turning is easily banked. In particular, in this configuration, since the traveling wind is more easily separated on the upper side of the cowl away from the ground contact point of the wheels (front wheel 16 and rear wheel 22) which are the swing centers when banking, the bank operation is performed. The moment from the ground contact point of the wheel at the time is reduced, and the operation load to be banked can be kept low.

7 is an exploded perspective view showing attachment of the front side cowls 65, 65, and FIG. 8 is a view of the front side cowl 65 as seen from the back side. FIG. 9 is a view of the mounting state of the front side cowl viewed from the back side.
As described above, the front side cowl 65 has a long cowl shape before and after covering the side of the fuel tank 41 from the front portion of the front upper cowl 61. As shown in FIG. The side is fixed to the front upper cowl 61 side, and the rear side is fixed to the fuel tank 41. In FIG. 7, reference numerals 85 and 85 denote inner covers that cover the rear surfaces of the nose side portions 63 and 63 of the front upper cowl 61. The inner covers 85 and 85 are connected to the nose side portion 63 and the screws 100 and 100. And fixed to the front side cowl 65 by screws 101 and 101 (see FIG. 9).

  As shown in FIG. 8, the front side cowl 65 is provided with screw fastening portions 91, 92, and 93 extending inward of the vehicle body at the upper and lower and middle portions of the front portion, and between the front screw fastening portion 91 and the middle portion. A protrusion 94 is provided between the screw fastening portion 91 and the front upper cowl 61. As shown in FIGS. 7 and 9, the projection 94 is inserted into the opening of the hook 111 provided in the front upper cowl 61 so as to be slidable back and forth, and the front side cowl 65 is moved rearward in the inserted state. Then, as shown in FIG. In this state, as shown in FIG. 9, three screw fastening portions 91 to 93 of the front side cowl 65 are provided above and below the front upper cowl 61 by screws 103, 104, and 105 from the inside of the vehicle body. When the screw insertion portions 112, 113, and 114 are attached, the front side cowl 65 is fixed to the front upper cowl 61.

Further, as shown in FIG. 7, the left and right sides of the fuel tank 41 are provided with a screw fastening portion 41F having a screw hole extending in the vertical direction of the vehicle body and a bent portion 41R bent in an L shape toward the front side of the vehicle body. These function as a cowl support member for supporting the front side cowl 65.
On the other hand, the upper inclined surface (upper side surface) 66A of the front side cowl 65 is provided with a screw insertion portion 65A communicating with the screw hole of the screw fastening portion 41F on the upper side of the fuel tank 41, and the lower inclined surface of the front side cowl 65 (Lower side surface) 67B is also provided with a screw insertion portion 65B, and a screw fastening portion 96 to which a screw 101 for fixing the inner cover 85 is fastened is provided inside the front side cowl 65.

As shown in FIG. 8, a hook 97 that can be hooked on a bent portion 41 </ b> R provided in the fuel tank 41 is provided inside the rear portion of the front side cowl 65, and the hook 97 is connected to the front side cowl 65. When the front side cowl 65 is slid rearward of the vehicle body with the front projection 94 inserted into the front upper cowl 61, the front end of the bent portion 41R enters and is caught, whereby the front side cowl 65 is engaged with the fuel tank 41. Can be stopped.
Subsequently, the screw 107 is inserted from the outside of the vehicle body into the screw insertion portion 65A provided at the upper portion of the front side cowl 65 and fastened to the screw fastening portion 41F of the fuel tank 41, whereby the front side cowl 65 is connected to the fuel tank 41. Fixed to.

Further, as shown in FIG. 1, a screw insertion portion 65B formed in the lower rear portion of the front side cowl 65 communicates with a screw fastening portion 11X provided in the vehicle body frame 11, and is fronted by a screw 108 (see FIG. 8). The side cowl 65 is also fixed to the vehicle body frame 11. In this manner, the front side cowl 65 is fixed to the front upper cowl 61, the fuel tank 41, and the vehicle body frame 11, and the support rigidity of the front side cowl 65 is sufficiently secured.
FIG. 10 is a perspective view showing the front side cowl 65 on the right side of the vehicle body together with the peripheral configuration. As shown in this figure, since the front side cowl 65 only covers the upper part (head cover 17D) of the engine 17, the front side cowl 65 is not covered without covering the spark plug 120 inserted and fixed to the cylinder head 17C of the engine 17 from the side. It is possible to easily attach and detach the spark plug 120 without removing the plug.

As described above, according to the present embodiment, the notch 69 extending in the vehicle front-rear direction is provided on the side surface of the front side cowl 65 on the side of the front cowl 60, and the upper front side cowl 66 above the notch 69 is provided. Is protruded outward in the vehicle width direction from the lower front side cowl portion 67 below the notch portion 69 in front view, so that the wheels (front wheels 16 and rear wheels 22) that serve as rocking centers for banking are contacted. The traveling wind is more easily separated on the upper side of the cowl away from the point, and the operation load for banking with a simple shape can be kept low.
Further, the front side cowl 65 extends in a substantially V shape toward the rear with the front part of the front cowl 60 as the apex, and the upper front side cowl part 66 extends rearward and covers the side surface of the fuel tank 41, and the lower part. Since the front side cowl portion 67 extends downward and covers the upper part of the engine 17, the traveling wind from the front of the vehicle body can be separated into the upper and lower sides with a simple shape and distributed to the passenger side and the engine 17 side. it can. Therefore, it is possible to send a comfortable traveling wind to the occupant and to improve the cooling effect and the heat shielding effect of the engine 17.

Moreover, since the upper front side cowl portion 66 and the lower front side cowl portion 67 extend rearward from the front portion of the front cowl 60, the traveling wind is separated vertically from the front of the vehicle body as much as possible so that the passenger side and the engine 17 side And can be flowed sufficiently. Further, since the traveling wind can be distributed between the occupant side and the engine 17 side without tightening the inclination of the cowl portions 66 and 67, it is possible to avoid an increase in front projection area and an increase in air resistance.
Further, since the lower front side cowl portion 67 extends rearward and overlaps at least a part of the side cover 71, it is possible to more effectively block the exhaust heat of the engine 17 from being transmitted to the occupant.
Further, since the flip portion 67C that bends outward in the vehicle width direction is provided at the lower end of the lower front side cowl portion 67, the traveling wind that flows downward along the lower front side cowl portion 67 is separated from the front side cowl 65. The rectifying effect can be improved.

In addition, since a concave surface 66C is provided on the upper surface of the upper front side cowl portion 66, a part of the traveling wind flowing along the cowl portion 66 can be adjusted so as not to flow to the occupant side, and the air flow to the occupant is adjusted. Comfort can be improved.
Further, an opening 66E with a louver is provided on the back surface of the upper front side cowl portion 66, and the air inside the lower front side cowl portion 67 is guided to the lower side of the fuel tank 41 by the cut portion 69. Therefore, the upper front side cowl portion 66 The inside air can be smoothly discharged from the louvered opening 66E and guided to the occupant side, and the air inside the lower front side cowl 67 can improve the cooling performance of the engine 17 and the heat shielding to the fuel tank 41. it can.
Further, since the front side cowl 65 covers the side of the front upper cowl 61 so as to be detachable, various maintenance operations such as detaching the fuel tank 41 by removing the front side cowl 65 from the front upper cowl 61 can be easily performed. .

In addition, the lower inclined surface (lower side surface) 66B of the upper front side cowl portion 66 and the upper inclined surface (upper side surface) 67A of the lower front side cowl portion 67 form a cut portion 69 extending in the longitudinal direction of the vehicle body. The cut portion 69 can further improve the rectification effect of the traveling wind.
Further, since the lower inclined surface (lower side surface) 67B of the lower front side cowl portion 67 is formed on the surface inclined toward the inner side of the vehicle body as it goes downward of the vehicle body, the traveling wind flowing along the cowl portion 67 is surely obtained. It can be led to the engine 17 side.
In addition, since the upper front side cowl portion 66 has a V-shaped cross section opened to the inside of the vehicle body and the lower front side cowl portion 67 is also formed in a bent cross section, these section coefficients can be increased, and the cowl strength can be improved. Can do.
Further, the rear edges of the upper front side cowl portion 66 and the lower front side cowl portion 67 are formed in a shape that substantially matches the contour line of the recess of the knee grip portion 41A provided in the fuel tank 41, so Can be surely avoided and the knee grip can be easily performed. The rear edges of the cowl portions 66 and 67 are not limited to a shape that substantially matches the contour line of the recess of the knee grip portion 41A, but a part or the whole of the cowl portions 66 and 67 has a shape that conforms to the contour line of the recess. May be.

Further, in this configuration, since the substantially V-shaped rectifying groove 68 is formed at the boundary between the separate front upper cowl 61 and the front side cowl 65, in order to obtain a windshield / rectifying effect, A windshield / rectifying effect can be easily obtained between separate cowls without performing complicated shape processing on the cowl covering the side (side cowl). In this case, since the rectifying groove 68 is formed in a V shape in a side view from the vicinity of the front end of the front upper cowl 61 to the rear, the V-shaped upper portion (nose side portion 63) sandwiching the rectifying groove 68 is inclined. The windshield / rectifying effect can be effectively obtained.
Further, since the rectifying groove 68 extends rearward from the vicinity of the front end of the front upper cowl 61, the traveling wind can be guided toward the occupant, and the front turn signal 83 is provided at the front portion of the rectifying groove 68. Thus, the amount of air flowing to the occupant can be moderately reduced.

  As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this, A various design deformation | transformation can be performed. For example, although the case where the front side cowl 65 is formed as an integral part has been described in the above-described embodiment, the present invention is not limited thereto, and the front side cowl 65 may be configured by connecting a plurality of cowl parts. The present invention is not limited to the application to a motorcycle equipped with an air-cooled single cylinder engine 17, but can be widely applied to a motorcycle equipped with an air-cooled multi-cylinder engine or a motorcycle equipped with a water-cooled engine.

1 is a side view of a motorcycle including a cowl structure according to an embodiment of the present invention. 1 is a front view of a motorcycle. Fig. 3 is a front view of the motorcycle with the front side cowl removed. It is the figure which looked at the motorcycle from diagonally upward. It is a side view which shows a front cowl with a fuel tank. (A) is a front view of a front cowl, and (B) is a BB cross-sectional view of the left front side cowl of FIG. It is a disassembled perspective view which shows attachment of a front side cowl. It is the figure which looked at the front side cowl from the back side. It is the figure which looked at the attachment state of the front side cowl from the back side. It is a perspective view which shows the front side cowl of the vehicle body right side with a periphery structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motorcycle 11 Body frame 17 Engine 41 Fuel tank 41F Screw fastening part (front side cowl support member)
41R bent part (front side cowl support member)
42 seat 50 body cover 60 front cowl 61 front upper cowl 62 nose part 63 nose side part 64 air intake duct part 65 front side cowl 66 upper front side cowl part 66C recessed surface 67 lower front side cowl part 68 rectifying groove 69 notch 71 Side cover

Claims (6)

In the cowl structure of a motorcycle with a front cowl (60) covering the front of the vehicle body,
The front cowl (60) includes a front upper cowl (61) covering the center of the front of the vehicle body, and a front side cowl (65) provided on the side of the front upper cowl (61) .
Wherein the side surface of the front side cowl (65), notch that extends in the vehicle longitudinal direction (69) is provided, the upper front side cowl portion above the cut portion (69) is (66), from the cut portion (69) The lower front side cowl portion (67) below protrudes outward in the vehicle width direction in front view,
The upper front side cowl part (66) is set to have a larger inclination when projecting in the vehicle width direction from the front to the rear of the vehicle body than the lower front side cowl part (67). Motorcycle cowl structure. The front side cowl (65) extends in a substantially V shape toward the rear with the front lower end of the front cowl (60) as an apex, and the notch (69) extends rearward from the vicinity of the apex. A front side cowl (66) extends so as to cover a side surface of the fuel tank (41) supported above the vehicle body frame (11) , and the lower front side cowl portion (67) extends rearward and lower to the fuel tank. The cowl structure for a motorcycle according to claim 1, wherein the cowl structure extends so as to cover an upper portion of the engine (17) supported below (41) . The fuel tank (41) fuel tank (41) from under the rear of the seat (42) has a side cover (71) covering the vehicle body side portion of the lower, the lower front side cowl portion (67), said side cover ( 71. The cowl structure for a motorcycle according to claim 1, wherein the cowl structure extends so as to at least partly overlap with 71) . The motorcycle according to any one of claims 1 to 3, wherein a flip portion (67C) that is bent outward in the vehicle width direction is provided at a lower end of the lower front side cowl portion (67) . Cowl structure. The cowl structure for a motorcycle according to any one of claims 1 to 4, wherein a concave surface (66C) is provided on an upper surface of the upper front side cowl portion (66) . An opening (66E) with a louver is provided on the back surface of the upper front side cowl portion (66) , and the inner surface of the lower front side cowl portion (67) is provided at the lower front end of the front side cowl (65) . The cowl structure for a motorcycle according to any one of claims 1 to 5, characterized in that the air sucked from the air intake duct (64) is guided to the bottom of the fuel tank (41) .

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