JP7340564B2 - saddle type vehicle - Google Patents

Description

The present invention relates to a saddle type vehicle.

A saddle type vehicle may be provided with a main stand between a front wheel and a rear wheel. For example, many scooter type vehicles employ a main stand. Some vehicles of this type have a main stand reinforced with a reinforcing plate (for example, Patent Document 1).

Patent No. 6271488

It is desirable for saddle-ride vehicles to have improved aerodynamic characteristics.
However, separately providing parts for improving aerodynamic characteristics not only increases the number of parts, but also requires securing space for mounting the parts and complicating the mounting structure.
By the way, the inventors investigated and found that in the case of a configuration in which the air cleaner unit is placed on the side of the rear wheel, when the aerodynamic characteristics for the rear wheel are improved, the outside air flowing into the air cleaner unit from behind increases. It turned out to be possible. By increasing the amount of outside air flowing in from the rear, it can be expected that the amount of air taken into the air cleaner unit will increase.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to improve aerodynamic characteristics for rear wheels with a simple configuration. Although it is not an essential object of the present invention, it is an object of the present invention to facilitate increasing the amount of air taken into the air cleaner unit by improving the aerodynamic characteristics.

In a saddle-ride type vehicle comprising a vehicle body that supports a front wheel, a rear wheel, and a power unit, and a main stand located between the front wheels and the rear wheels, the main stand is provided with a reinforcing plate; and an air cleaner unit that constitutes a part of the intake system of the power unit, and the reinforcing plate is capable of distributing outside air from the front of the vehicle body to the left and right in front of the rear wheels when the main stand is in the retracted position. The vehicle has a rectifying portion projecting downward, and when the main stand is in the retracted position, the front surface of the rectifying portion is a curved surface that curves forward in a convex manner with the front end at the center of the vehicle width. Features.

By using the reinforcing plate of the main stand, a rectifying section is provided that distributes outside air from the front of the vehicle to the left and right in front of the rear wheels, making it possible to improve aerodynamic characteristics for the rear wheels with a simple configuration. Therefore, it contributes to improving fuel efficiency and reducing _CO2 .

FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention. FIG. 3 is a view of the main stand together with the surrounding components as seen from the left side of the vehicle body. FIG. 2 is a view of the main stand and its surrounding components as seen from the front of the vehicle body. FIG. 3 is a perspective view of the main stand. FIG. 3 is a diagram of the main stand viewed from the rear side. FIG. 2 is a cross-sectional view of the main stand in the storage position, together with the surrounding structure, as seen from the left side of the vehicle body. FIG. 6 is a diagram showing a simulation result of the flow of outside air around the air cleaner unit when the vehicle is traveling. It is a figure showing a modification of a rectification part.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In addition, in the description, directions such as front, rear, left, right, and top and bottom are the same as directions with respect to the vehicle body unless otherwise specified. Further, the symbol FR shown in each figure indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

FIG. 1 is a left side view of a motorcycle 1 according to an embodiment of the present invention.
The motorcycle 1 includes a body frame 10, a front fork 11 that supports a front wheel 2 in a steerable manner, a unit swing type power unit 12 supported at the rear of the body frame 10, and a rear wheel 3, so that a rider can straddle them. This is a scooter-type saddle-riding vehicle equipped with a seat 13 for seating. The motorcycle 1 includes a body cover 14 that covers a body such as a body frame 10.

The vehicle body frame 10 includes a head pipe 15 provided at the front end of the vehicle body frame 10, a down frame 16 extending downward from the head pipe 15, a lower frame 17 extending rearward from the down frame 16, and a lower frame 17 extending rearward and upward from the lower frame 17. The seat frame 18 is provided with an extending seat frame 18. The vehicle body frame 10 constitutes the "vehicle body that supports the front wheels, the rear wheels 3, and the power unit 12" of the present invention.

The front fork 11 is supported by a head pipe 15 and is provided so as to be freely steerable left and right around the head pipe 15. The front wheel 2 is supported by the lower end of the front fork 11. A steering handle 20 is attached to the upper end of the front fork 11.

The power unit 12 is supported by the seat frame 18 so as to be able to swing up and down, and extends below the seat frame 18 in the longitudinal direction of the vehicle.
The power unit 12 includes an engine 31 that is an internal combustion engine, and a transmission device 32 that transmits the driving force of the engine 31 to the rear wheel shaft 3A. The engine 31 is an air-cooled, single-cylinder, four-stroke engine. The transmission device 32 includes a transmission mechanism including a belt-type continuously variable transmission mechanism, which is housed in a transmission case that extends from the rear side of the engine 31 (left side in this configuration) to the side (left side in this configuration) of the rear wheel 3. It is a configuration that accommodates.
Note that the engine 31 does not need to be a single-cylinder four-stroke engine, and the transmission mechanism does not need to be a belt-type continuously variable transmission mechanism. A widely available configuration can be applied to the engine 31 and the transmission mechanism.

An air cleaner unit 33 that forms part of the intake system of the power unit 12 is arranged above the transmission device 32 and on the side of the rear wheel 3 (on the left side in this embodiment). The air cleaner unit 33 is located above the transmission device 32, and therefore is located above the rear wheel shaft 3A.
As shown in FIG. 1, there is a gap S between the lower surface 33M of the air cleaner unit 33 and the upper surface 32M of the transmission device 32, and this gap S opens rearward on the side (left side) of the rear wheel 3. . This gap S passes near an intake port 33A provided at the front of the air cleaner unit 33.

The air cleaner unit 33 sucks in outside air from an intake port 33A provided at the front, cleans the sucked outside air with an air filter, and supplies it to the engine 31. The intake port 33A is provided on the outer surface of the front portion of the air cleaner unit 33 in the vehicle width direction. The vehicle width direction coincides with the left-right direction of the motorcycle 1.
Note that the position of the intake port 33A may be changed as appropriate; for example, it may be provided on the lower surface of the front portion of the air cleaner unit 33, or on the inner surface of the front portion of the air cleaner unit 33 in the vehicle width direction. , it may be provided at the rear of the air cleaner unit 33 or the like.

A step floor 24 is provided below the front of the seat 13 and behind the head pipe 15 on which an occupant seated on the seat 13 rests his or her feet. The front part of the body cover 14 includes a front cover 40 that covers the front part of the body frame 10 from the front, an upper cover 41 that covers the handle 20 from the front above the front cover 40, and a front part that covers the front part of the body frame 10 from the rear. It includes an inner cover 42 and a front fender 43 that covers the front wheel 2 from above.
The front cover 40 is located above the front wheel 2 and the front fender 43. A lighting device 44 such as a headlight is provided at the bottom of this front cover 40. The front fender 43 is attached to the front fork 11.

The rear part of the vehicle body cover 14 includes a rear cover 46 that covers the left and right sides of the seat frame 18, and a rear fender 47 that covers the rear wheel 3 from the upper rear. A rear inner fender 48 is arranged between the rear cover 46 and the rear wheel 3 to cover the rear wheel 3 from the front and upper side. The rear inner fender 48 is provided at a position overlapping the air cleaner unit 33 when viewed from the side of the vehicle body, and swings up and down integrally with the power unit 12.

A side stand 51 is provided at the lower part of the front-rear center between the front wheel 2 and the rear wheel 3. A main stand 52 is provided between the side stand 51 and the rear wheel 3.
The side stand 51 is provided at a position offset to one left and right side (the left side in this configuration), and is formed as a one-legged stand that is movable between an upright position and a retracted position. This side stand 51 is supported by the lower frame 17 so as to be located on the lower left side of the step floor 24. By setting the side stand 51 to the upright position, the side stand 51 stands up on the road surface with the vehicle body tilted to one side (left side), and the vehicle body can be placed in a self-supporting state (parked state). Note that FIG. 1 shows a case where the side stand 51 is in the retracted position.

FIG. 2 is a view of the main stand 52 together with the surrounding components as seen from the left side of the vehicle body. FIG. 3 is a view of the main stand 52 together with the surrounding components as seen from the front of the vehicle body.
The main stand 52 is formed as a two-legged stand that is movable between an upright position and a retracted position, and is located below the power unit 12. In FIGS. 2 and 3, the main stand 52 in the upright position is indicated by 52 (A), and the main stand 52 in the retracted position is indicated by 52 (B).
By setting the main stand 52 to the upright position indicated by reference numeral 52(A), it becomes possible to park the vehicle without tilting the vehicle body to the left or right. The main stand 52 may also be referred to as a center stand or a double-legged stand.

In FIG. 2, reference numeral 60 is a support shaft that supports the main stand 52 on the vehicle body side. The support shaft 60 is a shaft extending in the vehicle width direction, and the main stand 52 rotates between an upright position and a retracted position with the support shaft 60 as a reference.
The support shaft 60 is located below and behind the bottom surface 31X of the crankcase of the engine 31. When the main stand 52 rotates toward the upright position, a part of the main stand 52 (a part of the reinforcing plate 71 described later) comes into contact with the bottom surface 31X of the crankcase, so that the main stand 52 stops at the upright position. do.

As shown in FIG. 2, the main stand 52 is located at a position lower than the height X1 of the rear wheel shaft 3A located at the center of the rear wheel 3 and the transmission device 32 in both the upright position and the retracted position, and , located forward of the longitudinal position Y1 of the rear wheel shaft 3A. The main stand 52 rotates back and forth about a support shaft 60 located at the lower rear of the crankcase of the engine 31, so that it extends rearward from the support shaft 60 in the retracted position. Therefore, in the retracted position, the front part of the main stand 52 extends between the crankcase and the rear wheel 3, and the rear part of the main stand 52 overlaps the left and right front parts of the rear wheel 3 when viewed from the side of the vehicle body. In addition, in FIG. 2, the transmission device 32 and the air cleaner unit 33 are shown by two-dot chain lines.
As shown in FIG. 3, the main stand 52 has a symmetrical shape with respect to the vehicle width center C1 when viewed from the front of the vehicle, and the left and right center portions of the main stand 52 are in front of the rear wheels 3. Overlap.

FIG. 4 is a perspective view of the main stand 52. FIG. 5 is a diagram of the main stand 52 viewed from the rear side. Further, FIG. 6 is a cross-sectional view of the main stand 52 in the retracted position, viewed from the left side of the vehicle body along with the surrounding structure.
As shown in FIGS. 4 and 5, the main stand 52 includes a cylindrical insertion member 53 that is inserted into the support shaft 60, and left and right legs that extend downward from the insertion member 53 at intervals in the vehicle width direction. portion 54 and a cylindrical bridging member 55 that bridges the left and right foot portions 54 at a position away from the insertion member 53. These members 53 to 55 are manufactured using, for example, metal cylindrical pipes, and are joined to each other by welding or the like. Note that the bridging member 55 is curved in an upwardly convex manner when viewed from the rear of the vehicle body. The shape of the bridging member 55 is not particularly limited, and for example, the bridging member 55 may be linear in the vehicle width direction when viewed from the rear of the vehicle.

A lever member 56 extending outward (to the left) in the vehicle width direction is joined to one of the foot portions 54 . As shown in FIG. 3, when the main stand 52 is in the retracted state, the lever member 56 is formed in a shape that curves upward on the outside in the vehicle width direction when viewed from the front of the vehicle body. A step portion 56A is provided at the outer end of the lever member 56 in the vehicle width direction, and the step portion 56A can be operated by stepping on the lever member 56 with the foot of a user (such as a passenger). The main stand 52 can be placed in the upright position by the user operating the step portion 56A. The lever member 56 is formed of, for example, a metal cylindrical pipe, and the step portion 56A is formed of, for example, a metal plate.

The main stand 52 includes a reinforcing plate 71 that reinforces the main stand 52. The reinforcing plate 71 includes a flat reinforcing plate main body 72 bridging between the left and right foot parts 54, a rectifying part 73 provided at the center of the reinforcing plate main body 72 in the width direction, and a rectifying part 73 provided at both left and right ends of the reinforcing plate main body 72. and a guard member 75 (rectifier guard member). In this embodiment, the reinforcing plate 71 is manufactured by bending and forming a single metal plate. However, the reinforcing plate 71 may be manufactured from a plurality of plate materials.

The reinforcing plate main body 72 includes a plate-shaped first plate portion 72A that bridges between the legs 54 in the vicinity of the insertion member 53, and a lower edge of the first plate portion 72A (an edge on the opposite side of the insertion member 53). A connected second plate portion 72B is provided.
The first plate portion 72A and the second plate portion 72B are joined to the front surfaces of the left and right foot portions 54 by welding or the like. Therefore, the first plate part 72A and the second plate part 72B are located in front of the foot part 54 and the bridging member 55 when the main stand 52 is in the upright position, and are located in front of the foot part 54 and the bridging member 55 when the main stand 52 is in the retracted position. It is located below the section 54 and the bridging member 55.

The first plate portion 72A becomes a sloped wall that slopes forward downward at the center in the vehicle width direction when the main stand 52 is in the upright position (see FIG. 4, etc.), and slopes backward when the main stand 52 is in the retracted position. (See Figure 2, etc.) When the motorcycle 1 is running, the first plate portion 72A becomes an inclined wall that slopes downward toward the rear, so that the running wind consisting of outside air from the front of the vehicle body can be smoothly guided rearward and downward in front of the rear wheel 3. .

The first plate portion 72A functions as a stopper for stopping the main stand 52 in the upright position by coming into contact with the bottom surface 31X (FIGS. 1 and 2) of the crankcase of the engine 31 when the main stand 52 is in the upright position. do. As shown in FIG. 3, the first plate portion 72A is located at a position overlapping the front surface of the rear wheel 3 when viewed from the front of the vehicle, and in this embodiment, the width of the first plate portion 72A is approximately the same as the width of the rear wheel 3. are manufactured in the same way.

As shown in FIG. 4, the second plate portion 72B is a plate-shaped member that is bent from the lower edge of the first plate portion 72A, and extends outward in the vehicle width direction from the first plate portion 72A. The second plate portion 72B serves as a vertical wall in front of the rear wheel 3 when the main stand 52 is in the upright position, and serves as a horizontal wall in front of the rear wheel 3 when the main stand 52 is in the retracted position. When the motorcycle 1 is running, the second plate portion 72B serves as a horizontal wall, so it does not impede the flow of running air from the front of the vehicle body. As shown in FIG. 5, the second plate portion 72B is provided at a position overlapping the bridging member 55 in the front-rear direction of the main stand 52. As shown in FIG. Therefore, when the main stand 52 is in the upright position, the bridging member 55 is covered by the second plate part 72B from the front of the vehicle body, and when the main stand 52 is in the retracted position, the bridging member 55 is covered by the second plate part 72B from below the vehicle body. be exposed.

As shown in FIG. 6, the flow straightening section 73 becomes a wall that projects downward in front of the rear wheel 3 when the main stand 52 is in the retracted position. As shown in FIG. 3, the rectifier 73 is located at the center in the vehicle width direction and between the left and right foot portions 54 of the main stand 52 when viewed from the front of the vehicle. Further, as shown in FIG. 2, the rectifier 73 is located below the bottom surface 31X of the crankcase of the engine 31 when viewed from the side of the vehicle body. Therefore, when the motorcycle 1 is running, the wind flowing below the power unit 12 toward the rear wheel 3 can be guided toward the left and right sides of the rear wheel 3 by the front surface 73F of the rectifier 73.

Specifically, as shown in FIG. 4, the flow straightening section 73 is manufactured by curving a plate-shaped portion connected to the lower edge of the second plate section 72B into an upwardly convex shape when the main stand 52 is in the upright position. ing. As shown in FIG. 5, the lowermost surface of the rectifying section 73 is formed along an upwardly convex arc α (also referred to as a U-shaped curve), and the rectifying section 73 and the second plate section 72B The boundary β is also shaped along the arc α.

In this configuration, in the rear view of the vehicle body shown in FIG. overhang. Here, since the rectifier 73 has a bent shape when viewed from the side of the main stand 52 and also has a bent shape in the width direction of the main stand 52 (also referred to as a curved shape), the rectifier 73 is not provided. The bending rigidity of the reinforcing plate 71 can be increased compared to the case. Therefore, the effect of reinforcing the main stand 52 by the reinforcing plate 71 can be effectively enhanced.

Further, when the main stand 52 is in the upright position, the upper surface of the rectifying section 73 is an upwardly convex surface. For this reason, rainwater etc. from above become difficult to accumulate in the rectifying section 73.
Further, when the main stand 52 is in the retracted position, the front surface 73F (see FIG. 6) of the rectifying section 73 becomes a wall surface that is convex toward the front when viewed from above of the vehicle body. Thereby, the running wind from the front of the vehicle body can be smoothly distributed to the left and right in front of the rear wheels 3. As shown in FIG. 3, the width of the straightening section 73 is smaller than the width of the rear wheel 3, so while suppressing the increase in air resistance caused by the straightening section 73, the wind blowing directly against the front surface of the rear wheel 3 is reduced. It is possible to do so.

Further, the front surface 73F of the flow straightening section 73 is a U-shaped curved surface that is convex toward the front, with the center in the vehicle width direction being located furthest forward in a plan view of the vehicle body, and gradually moving toward the rear as it goes outward in the vehicle width direction. This makes it easier to distribute the wind from the front of the vehicle evenly and smoothly to the left and right sides of the rear wheels 3.
Note that the width of the rectifying portion 73, the amount of downward protrusion, etc. may be changed as appropriate. In addition, although a case has been described in which the front surface 73F of the rectifying section 73 is formed into a curved surface along a forward convex circular arc (=a forward convex U-shaped curved surface), a polygonal surface along the circular arc is formed. It may be formed into

Here, the power unit 12, the vehicle body cover 14, the rear inner fender 48, and the like are located above the main stand 52 and in front of the rear wheels 3. Therefore, above the main stand 52, the wind from the front of the vehicle body does not directly hit the front surface of the rear wheels 3, or the amount that it directly hits is small.
Therefore, in this configuration, by providing the main stand 52 with the rectifying section 73 that rectifies the outside air directed toward the rear wheels 3, the outside air directed toward the rear wheels 3 can be sufficiently rectified. As a result, it becomes easier to obtain appropriate aerodynamic characteristics for the rear wheels 3.

For example, the rectifier 73 can suppress turbulence caused by the wind directly hitting the front surface of the rear wheels 3, which is advantageous in reducing air resistance, contributing to improved fuel efficiency and reduced _CO2 .
In this way, since the outside air flowing below the power unit 12 toward the rear wheels 3 is rectified, it is possible to suppress the situation in which this outside air influences the flow of outside air in the space above the main stand 52. For example, since the air cleaner unit 33 is located at the upper rear of the power unit 12, the rectifier 73 can easily suppress the influence of the traveling wind below the power unit 12 on the flow of outside air around the air cleaner unit 33. Become.

As a result of studies conducted by the inventors through simulations and the like, it has been found that by providing the rectifying section 73, an effect of increasing the flow of outside air from the rear to the air cleaner unit 33 can be obtained.
FIG. 7 is a diagram showing simulation results of the flow of outside air around the air cleaner unit 33 when the vehicle is running. Reference numeral A in FIG. 7 is a diagram showing the flow of outside air when the rectifying section 73 is not provided, as viewed diagonally from below the air cleaner unit 33. Further, reference numeral B in FIG. 7 is a diagram showing the flow of outside air when the rectifying section 73 is provided, as viewed diagonally from below the air cleaner unit 33.

As shown by symbols A and B in FIG. 7, outside air W1 from the front of the vehicle and outside air W2 from behind the air cleaner unit 33 flow into the intake port 33A of the air cleaner unit 33. The outside air W1 is part of the running wind that has flowed into the front of the air cleaner unit 33. Furthermore, the outside air W2 includes outside air that has flowed into the intake port 33A through the gap S that exists between the lower surface 33M of the air cleaner unit 33 and the upper surface 32M of the transmission device 32.

As shown by region Z in FIG. 7, the amount of outside air W2 increases when the rectifying section 73 is provided compared to when the rectifying section 73 is not provided. The amount of air intake from the Therefore, the provision of the rectifier 73 is more advantageous in improving intake efficiency.

Note that the symbol W3 in FIG. 7 is the running wind that flows backwards above the main stand 52 and to the side of the vehicle body at a higher speed than the outside air W1 and W2. Further, the symbol W4A is the running wind that flows backward under the power unit 12 at a higher speed than the outside air W1, W2, and the symbol W4B is the wind that flows backwards at a higher speed than the outside air W1, W2 through the rectifier 73. This is the wind flowing backwards.
The outside air W3, W4A, and W4B are shown with dashed dotted lines to make them easier to distinguish from the outside air W1 and W2 shown with solid lines. In addition, the flow of outside air other than outside air W1, W2, W3, W4A, and W4B (mainly the flow of outside air around the rear of the rear wheel 3) is indicated by a broken line. The outside air indicated by the broken line flows at a lower speed than the outside air W3, W4A, and W4B. Note that the flow of the outside air W2 is also shown in FIG.

Next, the left and right guard members 75 provided on the reinforcing plate 71 will be explained.
As shown in FIGS. 4 and 5, the left and right guard members 75 are manufactured by bending portions of the second plate portion 72B of the reinforcing plate body 72 located at both left and right ends. The left and right guard members 75 are symmetrical with respect to a plane passing through the vehicle width center C1.

As shown in FIG. 6, each guard member 75 is formed in a shape that protrudes further forward of the vehicle body and downward than the rectifying portion 73 when the main stand 52 is in the retracted position when viewed from the side of the vehicle body. As a result, when the motorcycle 1 is traveling, a protrusion or the like on the road surface comes into contact with the guard member 75 before the protrusion or the like comes into contact with the rectifying section 73 . Therefore, deformation and damage to the rectifying section 73 can be avoided.

As shown in FIG. A surface 75F of each guard member 75, which becomes a front surface when the main stand 52 is in the retracted position, is formed as an inclined surface that slopes downward toward the rear in front of the rectifying section 73. In addition, each guard member 75 has a surface 75R that becomes a back surface when the main stand 52 is in the retracted position, and is formed on a surface that is farther rearward than the rectifying section 73.
In this way, each guard member 75 is formed larger than the rectifying section 73 in the longitudinal direction, so that it is possible to effectively prevent protrusions on the road surface from coming into contact with the rectifying section 73 from the longitudinal direction.

Further, since the front surface 75F is inclined backwardly, the motorcycle 1 can easily ride over the contact member that is in contact with the surface 75F when the motorcycle 1 is traveling.
In this way, each guard member 75 functions as a rectifier guard member that guards the rectifier 73. Further, the guard member 75 can also be referred to as a skid plate, an under guard, or an under protector.

As shown in FIG. 3, each guard member 75 is located on the outer side in the vehicle width direction than the flow straightening portion 73 and the rear wheel 3 when viewed from the front of the vehicle body. As a result, each guard member 75 does not impede the rectifying effect of the rectifier 73, and it is also possible to suppress the situation in which the flow of the traveling wind flowing from the front of the vehicle body toward the rear wheels 3 is affected.
Furthermore, as shown in FIG. 4, each guard member 75 is formed in an inclined shape that slopes outward in the vehicle width direction from the base end of the main stand 52 toward the tip end (corresponding to the lower end in the upright position). has been done. Therefore, when the main stand 52 is in the retracted position, each guard member 75 becomes an inclined plate that is inclined outward in the vehicle width direction toward the rear of the vehicle body. Therefore, protrusions on the road surface can easily come into contact with any of the guard members 75, and flying objects that fly toward each guard member 75 from the front of the vehicle can be easily removed to the outside in the vehicle width direction.

It should be noted that each guard member 75 is small in size, and the inclination angle in the left-right direction with respect to the longitudinal direction of the vehicle body is an acute angle (less than 45°). Therefore, the situation in which air resistance increases due to each guard member 75 is sufficiently avoided. The shape, size, position, and number of each guard member 75 may be changed as appropriate within a range that provides a sufficient guard effect.

As described above, the motorcycle 1 of this embodiment includes the reinforcing plate 71 on the main stand 52 and the air cleaner unit 33 on the side of the rear wheel 3. The reinforcing plate 71 has a rectifying portion 73 that protrudes downward so that the outside air from the front of the vehicle body can be distributed to the left and right in front of the rear wheels 3 when the main stand 52 is in the retracted position. According to this configuration, the reinforcement plate 71 of the main stand 52 is used to provide the rectifying section 73 that distributes outside air from the front of the vehicle body to the left and right in front of the rear wheels 3, so that the number of parts is reduced to improve aerodynamic characteristics. It is possible to avoid situations in which the number of components increases, the need to secure mounting space for parts, or the mounting structure becomes complicated. Therefore, the aerodynamic characteristics of the rear wheels 3 can be improved with a simple configuration, contributing to improved fuel efficiency and reduction of _CO2 .

Further, since the reinforcement plate 71 of the main stand 52 is used to improve the aerodynamic performance of the rear wheel 3, the effect of increasing the outside air W2 from behind the air cleaner unit 33 can be expected as shown in FIG. Therefore, the effect of increasing the intake air amount of the air cleaner unit 33 can be expected.
Although the case where the air cleaner unit 33 is arranged at the position shown in FIG. 1 has been described, the position of the air cleaner unit 33 may be changed. For example, by improving the aerodynamic performance of the rear wheel 3 using the reinforcing plate 71, the flow of outside air around the rear wheel 3 including the sides of the rear wheel 3 changes compared to the conventional case. The position of the air cleaner unit 33 may be changed to the extent that the flow of outside air around the rear wheel 3 can be used to increase the amount of air taken into the air cleaner unit 33. Therefore, the air cleaner unit 33 may be arranged around the rear wheel 3 including areas other than the sides of the rear wheel 3. For example, the air cleaner unit 33 may be arranged on the left and right sides, in front of the rear wheel 3, or above the rear wheel 3.

If the sole purpose is to obtain aerodynamic characteristics for the rear wheel 3 using the reinforcing plate 71, the position of the air cleaner unit 33 may be arbitrary.
Furthermore, in this embodiment, when the main stand 52 is in the retracted position, the front surface 73F of the rectifier 73 is a wall surface that is convex toward the front when viewed from the top of the vehicle body, so that the outside air flowing from the front of the vehicle body toward the rear wheels 3 is directed to the rear. It can be smoothly distributed to the left and right sides of wheel 3. In this case, the effect that the bending rigidity of the reinforcing plate 71 can be easily increased is obtained compared to the case where the rectifying section 73 is formed into a planar shape extending linearly in the vehicle width direction.

Moreover, the front surface 73F of the rectifier 73 is formed into a curved surface that curves forward convexly with the front end at the center of the vehicle width, so that the outside air flowing from the front of the vehicle toward the rear wheels 3 is distributed evenly to the left and right sides of the rear wheels 3. This makes it easier to sort. Since the rectifying portion 73 has a curved shape, the bending rigidity of the reinforcing plate 71 can be effectively increased, and the rigidity required for the reinforcing plate 71 and the rigidity required for the main stand 52 can be easily obtained.

Furthermore, when the main stand 52 is in the upright position, the upper surface of the rectifying section 73 (the surface corresponding to the front surface 73F) becomes an upwardly convex surface, making it difficult for rainwater or the like to accumulate in the rectifying section 73 from above. As shown in FIG. 5, this curved shape follows the bridging member 55 of the main stand 52, so it becomes easier to cover the bridging member 55 with the reinforcing plate 71, thereby preventing the bridging member 55 from being exposed to the outside. This makes it possible to prevent objects flying from below the vehicle from coming into contact with the bridging member 55 and the like when the vehicle is running.

Furthermore, when the main stand 52 is in the retracted position, as shown in FIGS. 1 to 3, the rectifier 73 is located below the power unit 12 and is wider than the left and right width of the rear wheel 3 when viewed from the front of the vehicle. are also located in a narrow range. According to this configuration, the outside air flowing below the power unit 12 toward the rear wheels 3 can be guided to the left and right sides of the rear wheels 3 while suppressing an increase in air resistance due to the rectifier 73.

Furthermore, the air cleaner unit 33 is arranged above the lower surface of the power unit 12. In this case, since the traveling wind below the power unit 12 does not directly hit the rear wheels 3 due to the rectifier 73, the situation where the traveling wind directly hits the rear wheels 3 and affects the intake air of the air cleaner unit 33 is prevented. It can be suppressed.

The reinforcing plate 71 also has a guard member 75 that functions as a rectifier guard member that protrudes further forward of the vehicle body than the rectifier portion 73 and below the vehicle body when the main stand 52 is in the retracted position. This guard member 75 can prevent protrusions on the road surface from coming into contact with the flow straightening section 73, making it easier to avoid deformation and damage to the flow straightening section 73.

Further, as shown in FIG. 3, the guard member 75 is located on the outer side in the vehicle width direction than the flow straightening section 73 and the rear wheel 3 when viewed from the front of the vehicle body. According to this configuration, the guard member 75 does not impede the rectification of the rectifier 73 and easily suppresses the situation in which the flow of the traveling wind directly hitting the rear wheels 3 is affected.

Note that the above-described embodiment shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment. For example, the shape of the rectifying section 73 may be modified.
FIG. 8 is a diagram showing a modification of the rectifying section 73. The difference in FIG. 8 is that, when the main stand 52 is in the retracted position, the rectifying portion 73 is formed in a U-shape that opens at the front side of the vehicle body when viewed from the side of the vehicle body. According to this configuration, the bending rigidity of the flow straightening section 73 can be increased compared to the flow straightening section 73 shown in FIG. 6, and the rigidity of the reinforcing plate 71 and the main stand 52 can be easily increased.

Furthermore, although the present invention has been described as being applied to the motorcycle 1 shown in FIG. It may also be applied to vehicles.

[Configuration supported by the above embodiment]
The above embodiment supports the following configurations.

(Structure 1) A saddle-ride type vehicle comprising a vehicle body that supports front wheels, rear wheels, and a power unit, and a main stand located between the front wheels and the rear wheels, and in which the main stand is provided with a reinforcing plate. An air cleaner unit that constitutes a part of the intake system of the power unit is provided around the rear wheels, and the reinforcing plate directs outside air from the front of the vehicle body to the front of the rear wheels when the main stand is in the retracted position. A saddle-riding type vehicle characterized by having a rectifying section that protrudes downward and can be distributed to left and right.
According to this configuration, aerodynamic characteristics for the rear wheels can be improved with a simple configuration. Therefore, it contributes to improving fuel efficiency and reducing _CO2 . In addition, it is possible to suppress the influence of outside air that comes into contact with the rear wheels from the front of the vehicle above the main stand, so if you want to place the air cleaner unit above the main stand, it is effective to increase the amount of outside air from behind the air cleaner unit. You can expect. Therefore, it becomes easier to increase the intake air amount of the air cleaner unit.

(Structure 2) The saddle-ride type vehicle according to Structure 1, wherein when the main stand is in the retracted position, the front surface of the rectifying section is a wall surface that is convex toward the front in a plan view of the vehicle body.
According to this configuration, outside air flowing from the front of the vehicle body toward the rear wheels can be smoothly distributed to the left and right sides of the rear wheels, and the bending rigidity of the reinforcing plate can be easily increased.

(Structure 3) The saddle-ride type vehicle according to Structure 2, wherein the front convex wall surface is a curved surface that curves forward in a convex manner with the front end at the center of the vehicle width.
According to this configuration, it becomes easier to distribute the outside air flowing from the front of the vehicle body toward the rear wheels evenly and smoothly to the left and right sides of the rear wheels, and it becomes easier to increase the bending rigidity of the reinforcing plate.

(Configuration 4) When the main stand is in the retracted position, the rectifier is located below the power unit and in a range narrower than the left-right width of the rear wheels when viewed from the front of the vehicle. The saddle-ride type vehicle according to any one of configurations 1 to 3.
According to this configuration, the outside air flowing below the power unit toward the rear wheels can be guided to the left and right of the rear wheels while suppressing an increase in air resistance due to the rectifying section.

(Structure 5) The saddle-ride type vehicle according to Structure 4, wherein the air cleaner unit is arranged above a lower surface of the power unit.
According to this configuration, the airflow below the power unit does not directly hit the rear wheels due to the rectifier, so it is possible to prevent the airflow from directly hitting the rear wheels and affecting the intake air of the air cleaner unit. . This can be expected to have the effect of increasing the amount of outside air coming from behind the air cleaner unit, making it easier to increase the intake air amount of the air cleaner unit.

(Structure 6) The saddle-ride type vehicle according to any one of Structures 1 to 5, wherein when the main stand is in the upright position, the upper surface of the rectifying section is an upwardly convex surface.
According to this configuration, rainwater and the like from above are less likely to accumulate in the rectifier.

(Configuration 7) Any one of configurations 1 to 6, wherein the reinforcing plate has a rectifying part guard member that protrudes further forward of the vehicle body and below the vehicle body than the rectifying part when the main stand is in the retracted position. The saddle type vehicle described in paragraph 1.
According to this configuration, it is possible to suppress a situation in which a protrusion on the road surface or the like comes into contact with the rectifying section.

(Structure 8) The saddle-ride type vehicle according to Structure 7, wherein the flow straightening portion guard member is located on the outer side in the vehicle width direction than the flow straightening portion and the rear wheel when viewed from the front of the vehicle body.
According to this configuration, the rectifier guard member does not obstruct the rectification of the flow by the rectifier, and it becomes easier to suppress the situation in which the flow of the traveling wind directly hitting the rear wheels is affected.

1 Motorcycle (saddle type vehicle)
2 Front wheel 3 Rear wheel 3A Rear wheel axle 10 Vehicle frame (vehicle body)
12 Power unit 33 Air cleaner unit 33A Intake port 51 Side stand 52 Main stand 53 Insertion member 54 Foot portion 55 Bridge member 71 Reinforcement plate 72 Reinforcement plate body 72A First plate portion 72B Second plate portion 73 Rectification portion 73F Front face of rectification portion 75 Guard member ( Rectifier guard member)

Claims (5)

A vehicle body (10) that supports a front wheel (2), a rear wheel (3), and a power unit (12), and a main stand (52) located between the front wheel (2) and the rear wheel (3), In the saddle type vehicle in which the main stand (52) is provided with a reinforcing plate (71),
An air cleaner unit (33) forming part of the intake system of the power unit (12) is provided around the rear wheel (3),
The reinforcing plate (71) includes a rectifying portion (71) that protrudes downward so that when the main stand (52) is in the retracted position, outside air from the front of the vehicle body can be distributed to the left and right in front of the rear wheels (3). 73) ,
When the main stand (52) is in the retracted position, the front surface (73F) of the rectifier (73) is a curved surface that curves forward in a convex manner with the front end at the center of the vehicle width. A saddle-riding vehicle. A vehicle body (10) that supports a front wheel (2), a rear wheel (3), and a power unit (12), and a main stand (52) located between the front wheel (2) and the rear wheel (3), In the saddle type vehicle in which the main stand (52) is provided with a reinforcing plate (71),
An air cleaner unit (33) forming part of the intake system of the power unit (12) is provided around the rear wheel (3),
The reinforcing plate (71) includes a rectifying portion (71) that protrudes downward so that when the main stand (52) is in the retracted position, outside air from the front of the vehicle body can be distributed to the left and right in front of the rear wheels (3). 73), which is located on the outer side in the vehicle width direction than the rectifier (73) and the rear wheels (3) when viewed from the front of the vehicle, and when the main stand (52) is in the retracted position, the rectifier (73) ) A saddle-riding type vehicle characterized by having a rectifier guard member (75) that protrudes forward of the vehicle body and below the vehicle body . When the main stand (52) is in the retracted position, the rectifier (73) is located below the power unit (12) and is wider than the left-right width of the rear wheel (3) when viewed from the front of the vehicle. The saddle type vehicle according to claim 1 or 2, wherein the saddle type vehicle is located in a narrow range. The saddle type vehicle according to claim 3 , wherein the air cleaner unit (33) is arranged above a lower surface of the power unit (12). The saddle riding according to any one of claims 1 to 4 , wherein when the main stand (52) is in the upright position, the upper surface of the rectifier (73) is an upwardly convex surface. type vehicle.

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