JP6200912B2 - Motorcycle front cowl structure - Google Patents

Description

  The present invention relates to a motorcycle, and more particularly to a front cowl structure of a motorcycle provided at a front portion of a vehicle.

  In a conventional front cowl structure of a motorcycle, for example, as described in Patent Document 1, a curved surface is mainly configured, and an opening is provided in a front surface portion for taking in a traveling wind. There is a structure in which the traveling wind that enters from the air is sent to the intake device side.

Japanese Patent No. 3379720

  On the other hand, in a front cowl having a valley where the outer surface is recessed, the flow of running wind on the cowl surface becomes complicated due to, for example, an accumulation of air in the valley. For this reason, there has been a problem that simply providing an opening cannot exert an effect such as smooth running and rectification of running wind. Therefore, there is a demand for a structure that can effectively rectify traveling wind even in a front cowl having a trough and a curved outer surface.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a front cowl structure that smoothens the flow of traveling wind that flows along a front cowl provided at the front of a vehicle.

In order to achieve the above object, the invention according to claim 1
A headlight provided at the front of the vehicle;
A front cowl arranged so as to surround the outer periphery of the headlight;
A shield disposed above the front cowl;
A motorcycle front cowl structure comprising:
The front cowl is formed with a trough recessed inward of the vehicle between the headlight and the shield.
An opening for flowing the running wind to the back side of the front cowl is formed along the valley.

In addition to the structure of Claim 1, the invention according to Claim 2
The opening is formed along the top of the headlight.

In addition to the structure of Claim 1 or 2, the invention which concerns on Claim 3 is
The shield is provided with an air guide opening for passing the running wind to the back side of the shield,
On the back side of the shield is provided with an under cowl that is substantially spaced from the shield at a predetermined interval, thereby forming an air guide path for passing the traveling air from the air guide port between the under cowl and the shield. It is characterized by.

In addition to the structure of Claim 3, the invention according to Claim 4
On the back side of the front cowl, a wind guide space connected to the opening is formed,
The air guide space and the air guide path are communicated with each other through an air exhaust port.

The invention according to claim 5 includes, in addition to the configuration according to claim 3 or 4,
The front cowl is characterized in that a rib is provided at a contact portion with the headlight.

In addition to the structure as described in any one of Claims 1-5, the invention which concerns on Claim 6 is
The said opening is formed so that opening width may become small gradually toward front and rear both ends.

According to the first aspect of the present invention, the front cowl is formed with a trough that is recessed inwardly of the vehicle between the headlight and the shield, and the traveling wind is further directed along the trough to the rear side of the front cowl. By forming the opening to flow into the valley, it is possible to guide the traveling wind collected in the valley to the opening while collecting the traveling wind in the valley. As a result, the air pocket generated in the valley can be effectively flowed to the rear of the vehicle, and the flow of traveling wind at the back portion of the front cowl can be improved.

  According to the second aspect of the present invention, since the opening is formed along the upper part of the headlight, the upper wall surface can be used as the air guide wall surface inside the opening. Therefore, the opening can be freely laid out along the top of the headlight without providing a special inner wall surface for the opening.

  According to the invention of claim 3, the shield is provided with the air guide port for passing the running wind to the back surface of the shield, and the back side of the shield is provided with the under cowl that is substantially spaced apart from the shield. Since the wind guide path through which the running wind from the wind guide port is passed is formed between the cowl and the shield, the shield back wind can be formed by actively flowing the running wind to the shield back portion. As a result, the running wind flowing along the shield front portion can be prevented from being caught on the shield rear surface, and the flow of the running wind at the front portion of the vehicle can be stabilized.

  According to the invention of claim 4, the wind guide space connected to the opening is provided on the back side of the front cowl, and the air exhaust port that communicates the wind guide space and the wind guide path is provided inside the wind guide space. Therefore, the traveling wind flowing from the opening can be actively flowed to the back side of the shield. As a result, the running wind flowing along the front surface of the shield can be prevented from being caught on the rear surface of the shield.

  According to the fifth aspect of the present invention, since the front cowl is provided with the rib at the contact portion with the headlight, the rigidity of the front cowl can be increased. Further, the ribs come into contact with the headlight, whereby the front cowl can be positioned, and it is easy to secure a wind guide space with a space from the headlight.

  According to the invention of claim 6, since the opening is formed so as to gradually reduce the opening width toward the front and rear ends, in particular, the strength reduction around the front and rear ends can be suppressed. A decrease in rigidity of the front cowl due to the formation can be suppressed.

1 is a right side view of a motorcycle according to the present invention. Fig. 2 is a front view of the main part of the motorcycle shown in Fig. 1. Fig. 3 is a perspective view of the front side of the front cowl of the motorcycle shown in Fig. 2. It is the perspective view which looked at the front cowl shown in FIG. 3 from the back surface side. It is a cross-sectional arrow view of the part along the AA line in FIG. It is a perspective view of the under cowl arrange | positioned under the front cowl shown in FIG. FIG. 2 is a perspective view of the motorcycle shown in FIG. 1 with a headlight taken out. Fig. 2 is a perspective view showing a front portion of the motorcycle shown in Fig. 1, and is a perspective view of a main part with a shield removed. FIG. 2 is a perspective view of a main part of the motorcycle shown in FIG. 1 when a front part of the vehicle is viewed from a driver side. Fig. 2 is an enlarged right side view of a front portion of the motorcycle shown in Fig. 1.

  Hereinafter, a motorcycle according to an embodiment of the present invention will be described with reference to FIGS. In the following description, front and rear, left and right, and top and bottom are described according to the direction seen from the operator. In the drawings, the front of the vehicle is Fr, the rear is Rr, The left side is shown as L, the right side as R, the upper side as U, and the lower side as D. The same applies to the description of the orientation of each part of the motorcycle.

  As shown in FIG. 1, a vehicle body frame 3 that is a skeleton part of the motorcycle 1 includes a pivot plate 3 b located on the rear side of the engine 4, and a diagonally upward direction from the pivot plate 3 b toward the head pipe 5 of the vehicle front portion 1 a. The main frame 3a extends to the rear, the support frame 3c extends rearward and upward from the pivot plate 3b, and a seat rail (not shown) that supports the riding seat 25. Further, a front fork 9a connected to the head pipe 5 is provided at the vehicle front portion 1a, a front wheel 8a is provided at a lower end portion of the front fork 9a, and a handle 9 is provided at an upper end portion.

  Further, the pivot plate 3b is provided with a front portion of the swing arm 6a so as to be swingable up and down with the pivot shaft 6p as a fulcrum. A rear wheel 8b is rotatably supported on the swing arm 6a by a rear end support shaft 6d. A rear cushion (not shown) is provided between the swing arm 6a and the body frame 3 (the body frame on the lower end side of the riding seat 25). The rear wheel 8b is driven by a chain 6c wound around a drive sprocket (not shown) on the engine 4 side and a driven sprocket (not shown) supported on the rear wheel 8b side.

As shown in FIG. 1, the motorcycle 1 includes a headlight 12, a front cowl 10 disposed so as to surround the outer periphery of the headlight 12, and an upper side of the front cowl 10. It has a front cowl structure including a shield 15 and an under cowl 16 (see FIG. 6). Note that an instrument section 7 is disposed behind the shield 15.
In the present embodiment, a side cover 21 is provided behind the side surface of the front cowl 10 so as to cover from the upper part of the engine 4 to the lower side of the fuel tank 26 and the riding seat 25, and behind the side cover 21. A rear cover 22 that covers the lower side of the riding seat 25 is provided. A bottom cover 23 that covers the lower portion of the engine 4 is provided on the lower rear side of the side cover 21.

  As shown in FIG. 2, the front cowl structure in the present embodiment includes a front cowl 10 that covers the upper side of the headlight 12 so as to surround the headlight 12, a shield 15 that is disposed on the upper side of the front cowl 10, and a head. And an under cowl 16 that extends below the light 12 and is disposed inside the front cowl 10.

Hereinafter, the front cowl 10 will be described with reference to FIGS. 3 and 4. 3 and 4 show a state in which the front cowl 10 is removed from the vehicle body.
As shown in FIG. 3, the front cowl 10 is a member that includes a left wall portion 10 </ b> L and a right wall portion 10 </ b> R that are symmetrical with respect to a front end portion 10 n that protrudes forward. That is, it is a substantially V-shaped structure including a left wall portion 10L extending obliquely rearward from the front end portion 10n and a right wall portion 10R extending obliquely rearward to the right side. A shield 15 described later is attached to a central space between the left wall portion 10L and the right wall portion 10R. Further, a notch portion 10he that is deeply cut rearward is formed on both lower sides of the left wall portion 10L and the right wall portion 10R, and a lamp portion 12a of the headlight 12 to be described later is fitted. Yes.

Further, the left wall portion 10L and the right wall portion 10R have a shape in which the width W1 is gradually increased from the front end portion 10n toward the left and right rear ends 10Le, 10Re. A recessed valley 11 is formed.
For example, as shown in FIG. 5, the cross-sectional shape of the valley portion 11 and its periphery has a gently curved shape in which the surface contour generally bulges slightly outward (swells in the upper right direction in FIG. 5). On the other hand, a trough 11 is formed which is recessed toward the vehicle inner side (lower left direction in FIG. 5). And this trough part 11 is formed along the longitudinal direction of 10 L of left wall parts and 10 R of right wall parts (refer FIG. 3).

  Further, the trough portion 11 is formed with an opening 13 through which a traveling wind, which will be described later, flows to the back side of the front cowl. 2 and 3, the opening 13 has an elongated shape along the longitudinal direction of the left wall portion 10L and the right wall portion 10R. More specifically, the opening 13 has a shape in which a lower lower edge 13de extends linearly in the vehicle front-rear direction, and an upper edge 13ue facing the lower edge 13de is appropriately inclined. That is, the upper edge 13ue is inclined so as to gradually decrease the opening width W2 from the central part in the front-rear direction toward both the front and rear edges 13se.

The structure of the back side of the front cowl 10 will be described with reference to FIG.
As shown in FIG. 4, the front cowl 10 has a structure in which a plurality of fixing bosses 10b including a fixing boss 10b on the back side of the front end portion 10n are appropriately provided. When the fixing boss 10b is fixed to a bracket (not shown) provided on the vehicle body frame 3, a fixing screw is screwed. Further, a rib 10v is provided near the opening 13 at the edge of the notch 10he. The rib 10v is a portion that comes into contact with a headlight 12 described later. Further, the rib structure is appropriately formed in addition to the rib 10v.

The shield 15 will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the shield 15 is provided between the left wall portion 10L and the right wall portion 10R of the front cowl 10, and extends to a height above the handle 9 in a side view. Windproof member. For example, the shield 15 is fixed to the front cowl 10 such that the outer peripheral edge portion 15e is positioned below the front cowl 10 (see FIG. 5). The shield 15 is fixed to the front cowl 10 so that the shield 15 and an under cowl 16 to be described later are arranged with a predetermined interval W5 (see FIGS. 5 and 10). The shield 15 is formed with a substantially V-shaped air inlet 15h at the center near the front surface, with the center bent downward as viewed from the front.

The under cowl 16 will be described with reference to FIG. FIG. 6 shows a state where it is detached from the vehicle body, similarly to the front cowl 10.
As shown in FIG. 6, the under cowl 16 includes a substantially triangular plate surface portion 16a extending obliquely upward and rearward from the front tip portion 16af, and a head extending obliquely rearward in the left-right direction from the front tip portion 16af. And a lower light corresponding portion 16w. Further, the plate surface portion 16a is provided with, for example, three fixing holes 16b including the front tip portion 16af.

The fixing hole 16b is a portion corresponding to the fixing boss 10b of the front cowl 10 described above, and is used for fastening the under cowl 16 and the front cowl 10 together through the fixing screw. Further, the headlight lower corresponding portion 16w has a shape corresponding to the shape of the lower portion 12ad of the lamp portion 12a of the headlight 12. Further, the left and right edge portions 16ae of the plate surface portion 16a correspond to come into contact with the middle stage surface 12b (see FIGS. 5 and 7) of the headlight 12 described later.
Here, when the under cowl 16 and the shield 15 are attached, the interval W5 is formed as described above, and the rear end 16re of the plate surface portion 16a extends to the vicinity of the instrument portion 7 (see FIGS. 9 and 10). ), A wind guide path AW (see FIG. 9 and FIG. 10) through which the running wind can flow along the shield rear surface side from the air guide port 15h during traveling is formed.

  The traveling wind from the air inlet 15h enters the air guide path AW formed by the shield 15 and the under cowl 16, but the shield 15 is configured to have a curved surface that swells outward in the front-rear direction and the left and right. As a result, the air guide port 15h has an upper edge tip 15hu positioned above the lower edge tip 15hd in a vehicle side view (see FIG. 10), and travel air can easily enter.

The headlight 12 will be described with reference to FIG. FIG. 7 shows a state in which the headlight 12 is removed from the vehicle body.
The headlight 12 includes a pair of lamp portions 12a extending on the left and right sides of the front end portion 12af. The lamp portion 12a has a substantially V-shaped structure when viewed from the front side that is cut off in the left-right direction and the rear direction. The headlight 12 includes an upper portion 12u that protrudes obliquely forward to the left and right above the lamp portion 12a. The headlight 12 moves backward along the upper portion 12u and by the first step wall surface 12g from the upper portion 12u. The vehicle further includes a middle step surface 12b, and further includes a rear step surface 12c that is retracted rearward of the vehicle by a second step wall surface 12k from the middle step surface 12b. Further, an attachment portion for attaching to the vehicle body is provided on the rear side of the rear step surface 12c. This is a three-step step structure provided with 12d. The first step wall surface 12g is provided with a plurality of light side ribs 12v extending in the front-rear direction at appropriate intervals.

The mounting and mounting state of the headlight 12, the front cowl 10, and the under cowl 16 in the present embodiment will be described below.
In mounting on the vehicle body, the headlight 12 is mounted on a bracket (not shown) provided on the head pipe 5 so as to protrude forward of the vehicle, for example, with a front end portion 12af as a front end (lighting portion) via an attachment portion 12d. 12a facing forward).
The front end portion 16af of the under cowl 16 is disposed in correspondence with the recessed portion of the front end portion 12af of the headlight 12, that is, the portion sandwiched between the lamp portions 12a. Accordingly, the headlight lower corresponding portion 16w corresponds to the lower portion 12ad of the lamp portion 12a, and further, the end edge portion 16ae of the central plate surface portion 16a is disposed so as to contact the middle step surface 12b of the headlight 12. (See FIG. 5).

  The front cowl 10 is mounted so as to cover the under cowl 16 with the shield 15 attached, for example. That is, the front cowl 10 is fixed so that the fixing boss 10b of the front end portion 10n corresponds to the fixing hole 16b of the front front end portion 16af of the under cowl 16.

  As a result, the vehicle front portion 1a is covered with the cowl structure, that is, as shown in FIG. 2, the pair of left and right lamp portions 12a sandwich the vehicle center line CL from the front cowl 10 and the under cowl 16 to the front. Mounted to be exposed.

  When the front cowl 10 is assembled, the rib 10v formed inside the front cowl 10 corresponds to the light side rib 12v provided on the first step wall surface 12g of the headlight 12 and abuts against the middle step surface 12b. . By this contact, the front cowl 10 is positioned, and the distance W5 between the front cowl 10, the headlight 12, and the under cowl 16 is maintained at a predetermined distance (see FIG. 5).

  As shown in FIGS. 2 and 3, the opening 13 in the present embodiment is arranged along the upper portion 12 u of the headlight 12. In the wall surface structure inside the opening 13, as shown in FIG. 8, the upper portion 12 u of the headlight 12 constitutes the lower inner wall surface inside the opening 13 and is guided between the inner wall surface of the front cowl 10. A wind space SP is formed. That is, in the air guide space SP, a space connected to the opening 13 is secured between the front end portion 10n and the rear side of the left wall portion 10L and the right wall portion 10R. Further, an air exhaust port 19 is formed inside the opening 13, that is, at a position closer to the vehicle center than the opening 13. Therefore, the running wind entering from the opening 13 is configured to flow from the wind guide space SP to the wind guide path AW through the exhaust port 19.

The traveling wind in the front cowl structure configured as described above will be described with reference to FIGS. 2, 8, and 10.
When the vehicle travels, a traveling wind f0 in front of the vehicle is generated. The traveling wind f0 flows three-dimensionally from the front end portion of the cowl surface covering the front portion of the vehicle in all directions up, down, left and right. Then, on the upper side of the headlight 12, a flow as described below occurs.

As shown in FIG. 10, the cowl front wind f1 flowing along the cowl surface from the tip portion 10n generates a wind inlet entrance wind f2 that partially enters the back side of the shield 15 from the wind inlet 15h. The air inlet approaching air f <b> 2 flows upward along the under cowl 16 and the shield 15. Further, as shown in FIGS. 2 and 8, the cowl front wind f1 entering the valley portion 11 enters the wind guide space SP from the opening 13 as the opening approaching wind f3. The opening approaching air f3 enters the air guide path AW from the air guide space SP through the air exhaust port 19.
Accordingly, the air inlet entrance air f2 and the opening air entrance f3 merge in the air guide path AW, and flow out upward and rearward along the back surface of the shield 15 as the shield back surface air f4. That is, the shield back surface air f4 flows through the air guide path AW as a combined air of the traveling air that has entered from the three openings. The shield back wind f4 merges with the cowl front wind f1 away from the rear edge 15re of the shield 15. At this time, the shield back wind f4 can easily form a laminar flow at the time of merging with the cowl front wind f1 by increasing the amount of air blown.

  In the present embodiment, the headlight 12 has a pair of openings 13 symmetrically across the vehicle center line CL, thereby improving the left-right balance of the air flow rate and contributing to running stability. Can do.

  As described above, in the present embodiment, the front cowl 10 is formed with the valley 11 that is recessed inward of the vehicle between the headlight 12 and the shield 15, and further, By forming the opening 13 through which the wind flows to the back side of the front cowl, the shield back wind f4 can be guided to the opening 13 while collecting the traveling wind in the valley 11. As a result, the air pocket generated in the valley portion 11 can be effectively flowed to the rear of the vehicle, and the flow of traveling wind at the back portion of the front cowl 10 can be improved.

  In the present embodiment, the opening 13 is formed along the upper portion 12 u of the headlight 12, so that the wall surface of the upper portion 12 u can be used as a wind guide wall surface inside the opening 13. Therefore, the opening 13 can be freely laid out along the upper portion 12 u of the headlight 12 without providing a special inner wall surface for the opening 13.

  Further, in the present embodiment, the shield 15 is provided with an air guide port 15h through which the traveling wind passes through the back surface of the shield, and an under cowl 16 is provided on the back side of the shield 15 with a predetermined distance from the shield 15. As a result, an air guide path AW is formed between the under cowl 16 and the shield 15 to pass the traveling air from the air inlet 15h. Can be formed. As a result, the cowl front wind f1 flowing along the shield front face can be prevented from being caught on the shield rear face, and the flow of the traveling wind in the vehicle front portion 1a can be stabilized.

  In the present embodiment, a wind guide space SP is provided on the back side of the front cowl 10 between the headlight 12 connected to the opening 13 and the upper portion 12u of the headlight 12, and the wind guide space SP is provided inside the wind guide space SP. Since the air exhaust port 19 that communicates the space SP and the air guide path AW is provided, the traveling air flowing in from the opening 13 can be actively flowed to the back side of the shield 15. As a result, it is possible to suppress the cowl front wind f1 flowing along the shield front portion from being caught on the shield back surface.

  In the present embodiment, since the front cowl 10 is provided with the rib 10v at the contact portion with the headlight 12, the rigidity of the front cowl 10 can be increased. Further, the rib 10v abuts on the headlight 12, whereby the front cowl 10 can be positioned, and it is easy to secure the air guiding space SP with a space from the headlight 12.

  Further, in the present embodiment, since the opening 13 is formed so as to gradually reduce the opening width toward the front and rear end portions 13e, in particular, a decrease in strength around the front and rear end portions 13e can be suppressed. A decrease in rigidity of the front cowl 10 due to the formation of the opening 13 can be suppressed.

As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, It can change suitably. For example, the shape of the front cowl 10, the concave shape of the valley portion 11, the shape and number of the openings 13, the shape of the headlight 12, the shape of the under cowl 16, the shape of the shield 15, the shape of the air inlet 15h, and the air outlet 19 The shape and size are not limited to the above embodiment and can be changed as appropriate.
Moreover, although the motorcycle has been described in the above embodiment, the present invention may be a straddle-type vehicle such as another buggy.

DESCRIPTION OF SYMBOLS 1 Motorcycle 1a Vehicle front part 12 Headlight 12a Lamp part 12af Front end part 12u Upper part 10 Front cowl 10v Rib 11 Valley part 13 Opening 15 Shield 15h Air guide port 16 Under cowl 19 Exhaust port AW Air guide path SP Wind guide space

Claims (6)

A headlight (12) provided at the front of the vehicle (1a);
A front cowl (10) disposed so as to surround the outer periphery of the headlight (12);
A shield (15) disposed above the front cowl (10);
A front cowl structure of a motorcycle (1) comprising:
Wherein the front cowl (10), between the headlight (12) and said shield (15), the trough recessed in a vehicle inward (11) is formed,
A front cowl structure for a motorcycle (1), characterized in that an opening (13) is formed along the valley (11) to allow the traveling wind to flow to the rear side of the front cowl. The front cowl structure of the motorcycle (1) according to claim 1, wherein the opening (13) is formed along an upper portion (12u) of the headlight (12). The shield (15) is provided with an air inlet (15h) for passing the running wind to the back side of the shield,
On the back side of the shield (15), an under cowl (16) that is substantially spaced apart from the shield (15) is provided, so that the space between the under cowl (16) and the shield (15) is increased. The front cowl structure for a motorcycle (1) according to claim 1 or 2, wherein an air guide path (AW) for passing traveling air from the air guide port (15h) is formed. A wind guide space (SP) connected to the opening (13) is formed on the back side of the front cowl (10),
The front cowl structure of the motorcycle (1) according to claim 3, wherein the wind guide space (SP) and the wind guide path (AW) are communicated with each other through an exhaust port (19). The front cowl (1) according to claim 3 or 4, wherein the front cowl (10) is provided with a rib (10v) at a contact portion with the headlight (12). Construction. The front cowl of the motorcycle (1) according to any one of claims 1 to 5, wherein the opening (13) is formed so that the opening width gradually decreases toward both front and rear ends. Construction.

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