JP7480212B2 - Saddle type vehicle - Google Patents

Description

The present invention relates to a saddle-type vehicle.

Conventionally, there is known a saddle-type vehicle that is equipped with an undercover that covers the vehicle body from below between the front and rear wheels, and that is equipped with a water-skirting rib that protrudes downward from the underside of the undercover and extends in the fore-and-aft direction of the vehicle (see, for example, Patent Document 1). According to Patent Document 1, the water-skirting rib can prevent water flowing along the undercover from being splashed up.

JP 2011-31750 A

However, in the conventional saddle-ride type vehicle described above, noise may be generated by the wind flowing along the water-skirting ribs while the vehicle is traveling.
The present invention has been made in consideration of the above-mentioned circumstances, and has an object to suppress splashing of water flowing along an undercover and to reduce noise caused by wind while traveling.

The saddle-ride type vehicle comprises a front frame consisting of a head pipe provided at the front end of a body frame, a down frame located rearward of the head pipe and extending downward from the head pipe, and a lower frame extending rearward from the lower part of the down frame, and an undercover covering the lower frame from below rearward from the lower end of the down frame between the front and rear wheels, the undercover having a drainage rib protruding downward from the undercover's underside and extending in the fore-and-aft direction of the vehicle, wherein the undercover has a convex portion that overlaps the drainage rib from the front of the vehicle when viewed from the front of the vehicle , the front end of the drainage rib is connected to the convex portion, and the drainage rib is hidden by the convex portion when viewed from the front of the vehicle .

In saddle-type vehicles, it is possible to suppress splashing of water flowing along the undercover and reduce noise caused by wind while driving.

1 is a side view of a saddle-ride type vehicle according to an embodiment of the present invention. FIG. 2 is a perspective view of the saddle type vehicle as viewed from below. FIG. FIG. 2 is an enlarged perspective view of a front end portion of the undercover. A plan view showing the peripheral area of the rear part of the left drainage rib. A plan view showing the peripheral area of the rear part of the right-side drainage rib.

Below, an embodiment of the present invention will be described with reference to the drawings. In the description, directions such as front, back, left, right, and up and down are the same as directions relative to the vehicle body unless otherwise specified. In addition, the symbol FR in each figure indicates the front of the vehicle body, the symbol UP indicates the upper part of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

[Embodiment]
FIG. 1 is a side view of a saddle-ride type vehicle 10 according to an embodiment of the present invention.
The saddle-type vehicle 10 is a vehicle that includes a body frame 11, a power unit 12 supported by the body frame 11, a front fork 14 that supports a front wheel 13 so as to be freely steerable, a swing arm 16 that supports a rear wheel 15, and a seat 17 for a passenger.
The saddle-ride type vehicle 10 is a vehicle in which a passenger sits astride a seat 17. The seat 17 is provided above the rear portion of the body frame 11.

The body frame 11 includes a head pipe 18 provided at the front end of the body frame 11, a front frame 19 located rearward of the head pipe 18, and a rear frame 20 located rearward of the front frame 19. The front end of the front frame 19 is connected to the head pipe 18.
The seat 17 is supported by a rear frame 20 .

The front fork 14 is supported by the head pipe 18 so that it can be steered left and right. The front wheel 13 is supported by an axle 13a provided at the lower end of the front fork 14. A steering handle 21 that is held by the rider is attached to the upper end of the front fork 14.

The swing arm 16 is supported by a pivot shaft 22 that is supported by the body frame 11. The pivot shaft 22 is a shaft that extends horizontally in the vehicle width direction. The pivot shaft 22 is inserted into the front end of the swing arm 16. The swing arm 16 swings up and down about the pivot shaft 22.
The rear wheel 15 is supported by an axle 15 a provided at the rear end of a swing arm 16 .

The power unit 12 is disposed between the front wheels 13 and the rear wheels 15 and is supported by the body frame 11 .
The power unit 12 is an internal combustion engine. The power unit 12 includes a crankcase 23 and a cylinder portion 24 that houses a reciprocating piston. An exhaust device 25 is connected to an exhaust port of the cylinder portion 24.
The output of the power unit 12 is transmitted to the rear wheel 15 by a driving force transmission member that connects the power unit 12 and the rear wheel 15 .

The saddle-type vehicle 10 also includes a front fender 26 that covers the front wheel 13 from above, a rear fender 27 that covers the rear wheel 15 from above, a step 28 on which a rider places his or her feet, and a fuel tank 29 that stores fuel used by the power unit 12.
The front fender 26 is attached to the front fork 14. The rear fender 27 and the step 28 are provided below the seat 17. The fuel tank 29 is supported by the body frame 11.

FIG. 2 is a perspective view of the saddle type vehicle 10 as viewed from below.
1 and 2, a saddle-type vehicle 10 is a motorcycle.
The power unit 12 is a unit swing engine in which the internal combustion engine and the swing arm 16 are integrally provided. The front frame 19 is located in front of the power unit 12. The rear frame 20 is located above the power unit 12.
The front frame 19 includes a down frame 19a extending downward from the head pipe 18, and a lower frame 19b extending rearward from a lower portion of the down frame 19a.
A rear cushion 30 is suspended between the rear end of the swing arm 16 and the rear part of the rear frame 20 .

The saddle-ride type vehicle 10 includes an air cleaner box 31 that takes in and purifies outside air. The air cleaner box 31 purifies the outside air taken in through an intake port 31a provided in the air cleaner box 31 with a filter, and supplies the purified outside air to the cylinder portion 24 as intake air.
The air cleaner box 31 is attached to the upper surface of the swing arm 16 behind the cylinder portion 24, and is disposed outward on one of the left and right sides (left side) of the rear wheel 15 which is located in the center of the vehicle width. The air cleaner box 31 overlaps an upper part of the rear wheel 15 from the outer side in the vehicle width direction in a side view of the vehicle.
A muffler 25 a of the exhaust device 25 is disposed outwardly on the other left or right side (right side) of the rear wheel 15 .

The saddle-ride type vehicle 10 is equipped with a side stand 32 that supports the saddle-ride type vehicle 10 in a state inclined to the left, and a main stand 33 that supports the saddle-ride type vehicle 10 in an upright state.
The side stand 32 is attached to the rear frame 20 in front of the power unit 12 .
The main stand 33 is attached to the underside of the crankcase 23 and is located below the air cleaner box 31.

The saddle-type vehicle 10 includes a vehicle body cover 35 that covers the vehicle body, such as the vehicle frame 11 .
The body cover 35 includes a front cover 36 that covers the head pipe 18 and the front forks 14 from the front, an inner cover 37 that covers the head pipe 18 and the front forks 14 from the rear, and side covers 38 that cover the body from the sides below the inner cover 37 and the seat 17.
The body cover 35 also includes a lower cover 39 that is disposed below the side covers 38 and covers the lower part of the vehicle body from the sides, and an undercover 40 that is disposed below the lower cover 39 and covers the vehicle body from below.

The undercover 40 is disposed between the front wheels 13 and the rear wheels 15 in the vehicle longitudinal direction. The undercover 40 is disposed in front of the crankcase 23, and covers the lower frame 19b and the fuel tank 29 from below. The undercover 40 is also disposed forward of the main stand 33 and the air cleaner box 31. The undercover 40 is disposed below the step 28 and the air cleaner box 31.

FIG. 3 is a plan view of the undercover 40 as viewed from below.
The undercover 40 is in the form of a plate that extends longer in the vehicle front-rear direction than in the vehicle width direction in a plan view.
The undercover 40 comprises a lower wall portion 41 that covers the lower frame 19b, the fuel tank 29, etc. from below, a front wall portion 42 that extends upward from the front edge of the lower wall portion 41, and a pair of left and right side wall portions 43 that extend upward from the left and right side edges of the lower wall portion 41, respectively.

The lower wall portion 41 is in the form of a plate arranged with its thickness direction oriented in the vertical direction.
The lower wall portion 41 includes a flat base portion 50 , a pair of left and right step portions 51 located on the outer sides of the base portion 50 in the vehicle width direction, and a pair of left and right protrusion portions 52 provided in front of each step portion 51 .
The undercover 40 also includes a pair of left and right drainage ribs 53 that protrude downward from the lower surface of the lower wall portion 41 .

FIG. 4 is an enlarged perspective view of the front end portion of the undercover 40. As shown in FIG.
3 and 4, the base portion 50 is a plate-like portion that constitutes most of the lower wall portion 41, and is disposed in the center of the vehicle width.
The step portions 51 are provided on the left and right side edges of the lower wall portion 41. The step portions 51 are portions where the lower surface of the lower wall portion 41 is recessed upward with respect to the base portion 50. The step portions 51 extend linearly from the front to the rear of the lower wall portion 41 in the vehicle front-rear direction.

In detail, the step portion 51 is an inclined surface that extends outward and upward in the vehicle width direction from the outer edge 50a in the vehicle width direction (left and right direction) of the base portion 50. The step portion 51 is inclined so as to be positioned upward as it moves from the outer edge 50a toward the outer side in the vehicle width direction. The depth of the step portion 51 increases as it moves toward the outer side in the vehicle width direction.

The drainage rib 53 is formed on the step portion 51. The drainage rib 53 is a wall portion that protrudes downward from the lower surface of the step portion 51.
The drainage rib 53 extends downward from the outer end of the step portion 51 in the vehicle width direction. The drainage rib 53 is also located at the outer end of the lower wall portion 41 in the vehicle width direction.
The water drainage rib 53 extends continuously from the front to the rear of the lower wall portion 41 in a straight line in the front-to-rear direction of the vehicle.

The protrusion 52 is provided on the front end of the lower wall portion 41. The protrusion 52 is provided in front of the step portion 51 and continues from the front end of the step portion 51. The protrusion 52 protrudes downward from the step portion 51.
In detail, the convex portion 52 comprises a convex portion rear surface portion 55 (rear surface portion) extending downward from the front end of the step portion 51, a convex portion lower surface portion 56 (lower surface portion, lower end of the convex portion) extending forward from the lower end of the convex portion rear surface portion 55, a convex portion front surface portion 57 extending upward from the front end of the convex portion lower surface portion 56, and a convex portion side portion 58 extending upward from the outer end of the convex portion lower surface portion 56 in the vehicle width direction.

The convex portion undersurface portion 56 is located on the vehicle width direction outer side of the front end portion 50b of the base portion 50. The convex portion undersurface portion 56 is in the form of a flat plate that is continuous with the front end portion 50b of the base portion 50. The convex portion undersurface portion 56 and the front end portion 50b of the base portion 50 are flush with each other, and the convex portion 52 does not protrude downward from the base portion 50.
The protrusion front surface portion 57 is formed by a lower portion of the end portion on the outer side in the vehicle width direction of the front wall portion 42, and constitutes a part of the front surface of the undercover 40. In a plan view, the protrusion front surface portion 57 is inclined so as to be positioned rearward as it approaches the outer side in the vehicle width direction.
The protruding side surface portion 58 is formed by the lower part of the front end portion of the side wall portion 43 .

The protrusion 52 is a front portion that is disposed in front of the drainage rib 53. When viewed from the front of the vehicle, the protrusion 52 overlaps with the drainage rib 53 from the front of the vehicle.
A front end 53a of the drainage rib 53 is connected to an end portion on the outer side in the vehicle width direction of the convex rear surface portion 55. The outer surface of the drainage rib 53 is flush with the outer surface of the convex side surface portion 58 and the outer surface of the side wall portion 43. When viewed from the front of the vehicle, the front end 53a is hidden by the convex portion 52. The width of the drainage rib 53 in the vehicle width direction is smaller than the width of the convex portion 52 in the vehicle width direction.
The lower end 53 b of the drainage rib 53 is located above the lower end of the convex portion 52 , which is the lower surface portion 56 of the convex portion.

The front end portion 50b of the base portion 50 is provided with a plurality of front fixing portions 59 which are fixed to the vehicle body.
A rear end portion 50c of the base portion 50 is provided with a plurality of rear fixing portions 60 which are fixed to the vehicle body.
The undercover 40 is fastened to, for example, the vehicle body frame 11 by fasteners (not shown) that are inserted through the front fixing portion 59 and the rear fixing portion 60 .

A vent hole 61 is provided at the front of the base portion 50, penetrating the base portion 50 in the vertical direction. The vent hole 61 is a long hole that extends in the vehicle width direction between the left and right drainage ribs 53.

FIG. 5 is a plan view showing the periphery of the rear part of the left drainage rib 53. As shown in FIG.
In the following description, in order to distinguish between the left and right drainage ribs 53, the left drainage rib 53 may be referred to as drainage rib 53L and the right drainage rib 53 may be referred to as drainage rib 53R.
3 and 5, an inner rib 63 and an outer rib 64 are provided on the lower surface of the undercover 40 and are connected to the rear end portion 53c of the drainage rib 53L.

The inner rib 63 and the outer rib 64 are wall portions that protrude downward from the rear portion of the lower wall portion 41 .
In a plan view, the inner rib 63 extends obliquely rearward and inward in the vehicle width direction from the rear end portion 53c.
In a plan view, the outer rib 64 extends obliquely rearward and outward in the vehicle width direction from the rear end portion 53c.
The drain rib 53L, the inner rib 63, and the outer rib 64 are positioned offset outward in the vehicle width direction to the left of the center of the vehicle width.

The lower end 63a of the inner rib 63 is the apex of the inner rib 63. The front surface of the inner rib 63 is a first rear inclined surface 63c that connects the lower end 63a and a base end 63b of the inner rib 63 located in front of the lower end 63a.
The first rear inclined surface 63c is inclined downward from the base end portion 63b toward the rear. The first rear inclined surface 63c is an inclined surface that slopes downward toward the rear in a side view of the vehicle. The first rear inclined surface 63c is disposed on the inner side in the vehicle width direction with respect to the rear end portion 53c.

FIG. 6 is a plan view showing the periphery of the rear part of the right drainage rib 53R.
Referring to Figures 3 and 6, the underside of the undercover 40 is provided with a vehicle width direction rib 65 connected to the rear end 53d of the drainage rib 53R, a front-to-rear direction rib 66 connected to the vehicle width direction rib 65, and a second vehicle width direction rib 67 connected to the front-to-rear direction rib 66.
The draining rib 53R extends further rearward than the draining rib 53L, and the rear end 53d is located rearward than the rear end 53c.

The vehicle width direction rib 65 , the front-rear direction rib 66 , and the second vehicle width direction rib 67 are wall portions that protrude downward from the rear of the lower wall portion 41 .
In a plan view, the vehicle width direction rib 65 extends inward in the vehicle width direction from the rear end portion 53d. The vehicle width direction rib 65 extends in a direction perpendicular to the vehicle front-rear direction.
In a plan view, the longitudinal rib 66 extends forward from an inner end in the vehicle width direction of the transverse rib 65. In a plan view, the longitudinal rib 66 is disposed at a substantially right angle to the transverse rib 65.
In a plan view, the second transverse rib 67 extends inward in the vehicle width direction from the front end of the longitudinal rib 66. An outer end 67a of the second transverse rib 67 is inclined so as to be positioned rearward as it approaches the outer side in the vehicle width direction in a plan view.
The drain rib 53R, the vehicle width direction rib 65, the front-rear direction rib 66, and the second vehicle width direction rib 67 are positioned offset to the right side in the vehicle width direction outward from the center of the vehicle width.

The lower end 65a of the vehicle width direction rib 65 is the apex of the vehicle width direction rib 65. The front surface of the vehicle width direction rib 65 is a second rear inclined surface 65c that connects the base end 65b of the vehicle width direction rib 65 located in front of the lower end 65a and the lower end 65a.
The second rear inclined surface 65c is inclined downward from the base end portion 65b toward the rear. The second rear inclined surface 65c is an inclined surface that slopes downward toward the rear in a side view of the vehicle. The second rear inclined surface 65c is disposed on the inner side in the vehicle width direction with respect to the rear end portion 53d.

Here, the flow of water and the flow of running wind through the undercover 40 will be described.
3 and 4, when the saddle-type vehicle 10 travels through, for example, a puddle on the road surface, water is splashed up from the front wheels 13, and adheres to the underside of the undercover 40. This water then flows rearward and outward along the underside of the undercover 40.
The water W1 flowing outward flows outward along the base portion 50 and the step portion 51, and then hits the inner surface of the drain rib 53 and falls downward while being guided by the drain rib 53. This prevents the water W1 flowing along the lower surface of the undercover 40 from splashing up from the undercover 40 outward in the vehicle width direction.

A part of the traveling wind A flowing from the front toward the undercover 40 hits the convex-portion front surface 57 of the convex portion 52 and flows outward and rearward in the vehicle width direction along the convex-portion front surface 57. Another part of the traveling wind A flows rearward of the convex portion 52 along the lower surface of the lower wall portion 41 including the convex-portion lower surface portion 56.
In the undercover 40, the protrusions 52 overlap the drainage ribs 53 from the front of the vehicle, so that the traveling wind A hits the protrusions 52 and moderately disturbs the airflow of the traveling wind A, thereby preventing the traveling wind A from directly hitting the drainage ribs 53. This prevents the traveling wind A from flowing forcefully along the drainage ribs 53, and reduces wind noise caused by the traveling wind A.

The front end 53a of the water-draining rib 53 is connected to the convex rear surface portion 55. This prevents the traveling wind A from directly hitting the front end 53a of the water-draining rib 53, reducing noise caused by the traveling wind A. In addition, by connecting the front end 53a to the convex rear surface portion 55, no gap exists between the convex portion 52 and the water-draining rib 53 in the fore-and-aft direction of the vehicle. This prevents noise caused by the traveling wind A passing through the gap, and increases the rigidity of the water-draining rib 53.

The lower end 53 b of the drainage rib 53 is located above the lower surface 56 of the convex portion 52 , which is the lower end of the convex portion 52 , and is recessed upward relative to the convex portion 52 .
This prevents the wind A from directly hitting the lower end 53b of the drainage rib 53, thereby suppressing the generation of noise due to the wind A.

In addition, the provision of the convex portion 52 prevents the traveling wind A from flowing strongly in the fore-and-aft direction of the vehicle along the water-cutting rib 53. This prevents the traveling wind A from acting as a resistance to the movement of banking the saddle-ride type vehicle 10 in the left-right direction, making it easier to turn the saddle-ride type vehicle 10.

2, 3, and 5, the draining rib 53L, the inner rib 63, and the outer rib 64 are disposed offset toward the air cleaner box 31 in the left-right direction centered on the rear wheel 15. In other words, the air cleaner box 31 is disposed substantially directly behind the draining rib 53L, the inner rib 63, and the outer rib 64.
In addition, a portion of the main stand 33 is located below the air cleaner box 31 and approximately directly behind the drain rib 53L, the inner rib 63, and the outer rib 64.

Referring to FIG. 5, water W2 flowing rearward along the outer surface of the drain rib 53 hits the outer rib 64 behind the rear end 53c of the drain rib 53L, and flows rearward and outward in the vehicle width direction along the outer rib 64.

In addition, water W3 flowing rearward along the inner surface of the drain rib 53 hits the inner rib 63 behind the rear end 53c of the drain rib 53L, and flows rearward and inward in the vehicle width direction along the inner rib 63.
In this way, the water flowing rearward along the drain rib 53 is guided to flow outward and inward in the vehicle width direction by the outer rib 64 and the inner rib 63. Therefore, the water flowing rearward along the drain rib 53 is prevented from flowing directly behind the drain rib 53.

When water flows directly rearward from the water-draining rib 53, some of this water may enter the intake port 31a of the air cleaner box 31. For example, some of the water that flows directly rearward from the water-draining rib 53 may hit the main stand 33, be bounced upward, and enter the intake port 31a.
In the undercover 40, the outer ribs 64 and the inner ribs 63 prevent water flowing rearward along the drain rib 53 from flowing directly behind the drain rib 53, thereby preventing water from entering the air intake port 31a.
5 shows an inner extension line 63d formed by directly extending the inner rib 63 rearward, and an outer extension line 64a formed by directly extending the outer rib 64 rearward. The air intake 31a (FIG. 1) is disposed in a region between the inner extension line 63d and the outer extension line 64a, behind the outer rib 64 and the inner rib 63. This makes it possible to prevent water flowing rearward along the drain rib 53 from flowing toward the air intake 31a.

Some of the water W3 flows rearward and inward in the vehicle width direction along the first rear inclined surface 63c of the inner rib 63, and flows rearward over the lower end 63a. Because the first rear inclined surface 63c is inclined downward to the rear, some of the water W3 falls rearward and downward along the first rear inclined surface 63c. This prevents the water flowing rearward from the inner rib 63 from heading upward, and prevents the water from reaching the air cleaner box 31.

In addition, part of the traveling wind that flows rearward along the underside of the undercover 40 flows rearward along the inner rib 63. This traveling wind, like water W3, flows rearward and downward along the first rear inclined surface 63c that slopes downward to the rear. This allows the traveling wind to pass smoothly through the inner rib 63, reducing the air resistance of the saddle-type vehicle 10. For example, if the front surface of the inner rib 63 protrudes vertically from the underside of the undercover 40, the resistance of the traveling wind will be large.

Referring to Figures 2, 3 and 6, the drainage rib 53R, the vehicle width direction rib 65, the front-rear direction rib 66, and the second vehicle width direction rib 67 are offset toward the muffler 25a in the left-right direction centered on the rear wheel 15.

6, water W4 flowing rearward along the outer surface of the draining rib 53R flows along the draining rib 53R rearward of the rear end portion 53d.
Furthermore, water W5 flowing rearward along the inner surface of the drain rib 53R flows rearward along the vehicle width rib 65. Because the second rear inclined surface 65c, which is the front surface of the vehicle width rib 65, is inclined rearward and downward, the water W5 falls rearward along the second rear inclined surface 65c. This makes it possible to prevent the water flowing rearward from the vehicle width rib 65 from heading upward.

Some of the water W5 flows rearward along the outer surface of the longitudinal rib 66, and then falls rearward and downward along the transverse rib 65. The longitudinal rib 66 prevents the water W5 from flowing inward in the transverse direction.

Water W6 flows from the front to the rear of the second width direction rib 67 along the inner side of the longitudinal rib 66 in the vehicle width direction, hits the front surface of the second width direction rib 67, flows along the second width direction rib 67 to the outside in the vehicle width direction, and then falls rearward and downward along the width direction rib 65.

In addition, part of the traveling wind that flows rearward along the underside of the undercover 40 flows rearward along the vehicle width direction rib 65. This traveling wind, like water W5, flows rearward and downward along the second rear inclined surface 65c that slopes downward to the rear. This allows the traveling wind to pass smoothly through the vehicle width direction rib 65, reducing the air resistance of the saddle-ride type vehicle 10. For example, if the front surface of the vehicle width direction rib 65 protrudes vertically from the underside of the undercover 40, the resistance of the traveling wind will be large.

As described above, according to an embodiment to which the present invention is applied, the saddle-type vehicle 10 is provided with an undercover 40 that covers the body frame 11 serving as the vehicle body from below between the front wheels 13 and the rear wheels 15, the undercover 40 is provided with a water drain rib 53 that protrudes downward from the underside of the undercover 40 and extends in the fore-and-aft direction of the vehicle, and the undercover 40 is provided with a convex portion 52 as a front portion that overlaps the water drain rib 53 from the front of the vehicle when viewed from the front of the vehicle.
According to this configuration, the water draining rib 53 extending in the front-to-rear direction of the vehicle can suppress splashing up of water flowing along the undercover 40. In addition, since the convex portion 52 overlaps with the water draining rib 53 from the front of the vehicle, the traveling wind A from the front hits the convex portion 52, moderately disturbing the airflow of the traveling wind A and suppressing the traveling wind A from directly hitting the water draining rib 53. This makes it possible to reduce the sound caused by the traveling wind A flowing along the water draining rib 53.

In addition, the front end 53 a of the drainage rib 53 is connected to the rear surface 55 of the convex portion 52 , which is the rear surface of the convex portion 52 .
According to this configuration, the front end 53a of the drainage rib 53 is hidden from the front by the convex rear surface portion 55, so that the traveling wind A from the front is prevented from directly hitting the drainage rib 53. Therefore, the noise caused by the traveling wind A can be reduced.

In addition, the undercover 40 has a flat base portion 50 and a step portion 51 that is recessed upward relative to the base portion 50 on the outer side in the vehicle width direction relative to the base portion 50, and the water drain rib 53 protrudes downward from the step portion 51, and the convex portion 52 protrudes downward relative to the step portion 51.
According to this configuration, the water-draining rib 53 is provided on the step portion 51 recessed upward from the flat base portion 50, so that the traveling wind A from the front is prevented from directly hitting the water-draining rib 53. This makes it possible to reduce noise caused by the traveling wind A. Furthermore, since the water-draining rib 53 is provided on the step portion 51, a large distance can be secured between the water-draining rib 53 and the road surface, and the water-draining rib 53 can prevent the minimum ground clearance of the saddle-ride type vehicle 10 from being reduced.

Furthermore, a lower surface 56 of the protrusion 52 is a flat plate that is continuous with the base portion 50 .
According to this configuration, a large distance can be secured between the protrusion 52 and the road surface, and the minimum ground clearance of the saddle type vehicle 10 can be prevented from being reduced by the protrusion 52 .

Further, the step portion 51 is an inclined surface that slopes upward toward the outer side in the vehicle width direction, and the water drainage rib 53 protrudes downward from the outer end of the step portion 51 in the vehicle width direction.
According to this configuration, water and running wind can be smoothly guided along the inclined surface toward the water drainage rib 53. Therefore, splashing of water can be effectively suppressed, and noise caused by running wind can be reduced.

In addition, the lower end 53 b of the drainage rib 53 is located above the lower end of the convex portion 52 , that is, the convex portion lower surface portion 56 .
According to this configuration, the wind A from the front can be prevented from directly hitting the drainage rib 53, and the noise caused by the wind A can be reduced.

In addition, an inner rib 63 and an outer rib 64 connected to the rear end 53c of the drain rib 53 are provided on the underside of the undercover 40, with the inner rib 63 extending rearward and inward in the vehicle width direction from the rear end 53c, and the outer rib 64 extending rearward and outward in the vehicle width direction from the rear end 53c.
According to this configuration, water flowing rearward from the drain rib 53 can be guided rearward and inward in the vehicle width direction by the inner rib 63, and can be guided rearward and outward in the vehicle width direction by the outer rib 64. This makes it possible to prevent water from being discharged directly behind the drain rib 53, and to protect parts such as the air cleaner box 31 disposed directly behind the drain rib 53 from water.

Furthermore, a vehicle width direction rib 65 connected to the rear end 53d of the drain rib 53 and a front-to-rear direction rib 66 connected to the vehicle width direction rib 65 are provided on the underside of the undercover 40, and the vehicle width direction rib 65 extends inward in the vehicle width direction from the rear end 53d, and the front-to-rear direction rib 66 extends forward of the vehicle from the inner end of the vehicle width direction rib 65.
According to this configuration, the water flowing rearward from the drain rib 53 can be prevented from flowing inward in the vehicle width direction by the longitudinal rib 66 and the vehicle width rib 65. Therefore, parts and the like arranged on the vehicle width direction inner side of the drain rib 53 can be protected from water.

In addition, on the underside of the undercover 40, a first rear inclined surface 63c and a second rear inclined surface 65c are provided on the inside in the vehicle width direction of the rear ends 53c, 53d of the water drainage rib 53, which slope downward as they extend rearward.
According to this configuration, the wind flowing rearward from the draining rib 53 can be smoothly guided rearward and downward by the first rear inclined surface 63c and the second rear inclined surface 65c, thereby reducing the resistance caused by the wind. Also, the water flowing rearward from the draining rib 53 can be guided downward by the first rear inclined surface 63c and the second rear inclined surface 65c, thereby preventing the water from flowing upward.

In addition, an air cleaner box 31 that takes in and purifies outside air is disposed behind the undercover 40 .
With this configuration, the direction of water flowing along the underside of the undercover 40 can be controlled by the water draining rib 53, and water flowing rearward from the undercover 40 can be prevented from hitting the air cleaner box 31.

The above-described embodiment shows one mode in which the present invention is applied, and the present invention is not limited to the above-described embodiment.
In the above embodiment, the protrusion 52 is described as being flush with the front end portion 50b of the base portion 50 and protruding downward from the step portion 51, but the present invention is not limited to this. The protrusion 52 may protrude downward from the base portion 50.
In addition, in the above embodiment, a motorcycle has been used as an example of the saddle-type vehicle 10, but the present invention is not limited to this, and the present invention is applicable to three-wheel saddle-type vehicles having two front wheels or two rear wheels, and saddle-type vehicles having four or more wheels.

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

(Configuration 1) A saddle-ride type vehicle having an undercover that covers the vehicle body from below between the front and rear wheels, the undercover having a water drain rib that protrudes downward from the undercover's underside and extends in the fore-and-aft direction of the vehicle, characterized in that the undercover has a front portion that overlaps the water drain rib from the front of the vehicle when viewed from the front of the vehicle.
According to this configuration, the water-skirting rib extending in the vehicle front-rear direction can suppress splashing of water flowing along the under-cover. Also, because the front part overlaps the water-skirting rib from the front of the vehicle, the wind from the front hits the front part, moderately disturbing the airflow of the wind, and suppressing the wind from hitting the water-skirting rib directly. This reduces the noise caused by the wind flowing along the water-skirting rib.

(Configuration 2) A saddle-type vehicle according to configuration 1, wherein the front end of the water drainage rib is connected to the rear surface portion of the front portion.
According to this configuration, the front end of the water-draining rib is hidden from the front by the rear surface of the front part, so that the wind from the front can be prevented from directly hitting the water-draining rib, thereby reducing noise caused by the wind.

(Configuration 3) A saddle-type vehicle as described in configuration 1 or 2, characterized in that the undercover has a flat base portion and a step portion that is recessed upward relative to the base portion on the vehicle width directional outer side of the base portion, the water drain rib protrudes downward from the step portion, and the front portion protrudes downward from the step portion.
According to this configuration, the water-skirting rib is provided on a step portion recessed upward from the flat base portion, so that the wind from the front is prevented from directly hitting the water-skirting rib, thereby reducing noise caused by the wind. Also, a large distance can be secured between the water-skirting rib and the road surface, preventing the minimum ground clearance of the saddle-type vehicle from being reduced by the water-skirting rib.

(Configuration 4) A saddle-type vehicle according to configuration 3, wherein the lower surface of the front portion is flat and continuous with the base portion.
According to this configuration, a large distance can be secured between the front portion and the road surface, and the minimum ground clearance of the saddle type vehicle can be prevented from being reduced by the front portion.

(Configuration 5) A saddle-type vehicle as described in configuration 3 or 4, characterized in that the step portion is an inclined surface that slopes upward as it moves outward in the vehicle width direction, and the water drain rib protrudes downward from the outer end of the step portion in the vehicle width direction.
According to this configuration, water and wind can be smoothly guided along the inclined surface toward the drain rib, effectively preventing water from splashing up and reducing noise caused by wind.

(Configuration 6) A saddle-type vehicle according to any one of configurations 1 to 5, characterized in that a lower end of the water drainage rib is positioned higher than a lower end of the front portion.
According to this configuration, it is possible to prevent the wind from the front from directly hitting the water drain rib, and to reduce noise caused by the wind.

(Configuration 7) A saddle-type vehicle described in any one of configurations 1 to 6, characterized in that an inner rib and an outer rib connected to the rear end of the water drain rib are provided on the underside of the undercover, the inner rib extending rearward and inward in the vehicle width direction from the rear end, and the outer rib extending rearward and outward in the vehicle width direction from the rear end.
With this configuration, the water flowing rearward from the drain rib can be guided rearward and inward in the vehicle width direction by the inner rib, and can be guided rearward and outward in the vehicle width direction by the outer rib. This makes it possible to prevent water from being discharged directly behind the drain rib, and to protect parts and the like arranged directly behind the drain rib from water.

(Configuration 8) A saddle-type vehicle described in any one of configurations 1 to 6, characterized in that the underside of the undercover is provided with a vehicle width rib connected to the rear end of the water drain rib and a front-to-rear rib connected to the vehicle width rib, the vehicle width rib extending inward in the vehicle width direction from the rear end, and the front-to-rear rib extending forward of the vehicle from the vehicle width inner end of the vehicle width rib.
According to this configuration, the longitudinal rib and the transverse rib can prevent water flowing rearward from the drain rib from flowing inward in the vehicle width direction, thereby protecting components and the like disposed on the transversely inner side of the drain rib from water.

(Configuration 9) A saddle-type vehicle as described in any one of configurations 1 to 8, characterized in that a rear inclined surface is provided on the underside of the undercover, on the vehicle width wise inner side of the rear end of the water drain rib, which inclines downward as it approaches the rear.
With this configuration, the wind flowing rearward from the drain rib can be smoothly guided rearward and downward by the rear inclined surface, reducing the resistance caused by the wind. Also, the water flowing rearward from the drain rib can be guided downward by the rear inclined surface, preventing the water from flowing upward.

10 Saddle-type vehicle 11 Vehicle frame (vehicle body)
13 Front wheel 15 Rear wheel 40 Under cover 50 Base portion 51 Step portion 52 Convex portion (front portion)
53 Drain rib 53a Front end 53b Lower end (lower end of drain rib)
53c Rear end portion 53d Rear end portion 55 Rear surface portion of convex portion (rear surface portion)
56 Lower surface of convex portion (lower surface, lower end of front portion)
63 Inner rib 63c First rear inclined surface (rear inclined surface)
64 Outer rib 65 Vehicle width direction rib 65c Second rear inclined surface (rear inclined surface)
66 Front-rear rib

Claims (9)

the vehicle is provided with a front frame (19) including a head pipe (18) provided at a front end of a body frame (11), a down frame (19a) located rearward of the head pipe (18) and extending downward from the head pipe (18), and a lower frame (19b) extending rearward from a lower portion of the down frame (19a),
A saddle-ride type vehicle including an undercover (40) that covers the lower frame (19b) from below, rearward of the lower end of the down frame (19a) between a front wheel (13) and a rear wheel (15), the undercover (40) including a water drain rib (53) that protrudes downward from a lower surface of the undercover (40) and extends in the fore-and-aft direction of the vehicle,
The undercover (40) includes a protrusion (52) that overlaps the drainage rib (53) from the front of the vehicle when viewed from the front of the vehicle ,
The front end (53a) of the drainage rib (53) is connected to the protrusion (52),
The saddle-type vehicle is characterized in that the water drain rib (53) is hidden by the protrusion (52) when viewed from the front of the vehicle . 2. The saddle-type vehicle according to claim 1, characterized in that the convex portion (52) comprises a rear surface portion (55) extending downward, a lower surface portion (56) extending forward from a lower end of the rear surface portion (55), a front surface portion (57) extending upward from a front end of the lower surface portion (56), and a side surface portion (58) extending upward from an outer end of the lower surface portion (56) in the vehicle width direction. The undercover (40) includes a flat base portion (50) and a step portion (51) that is recessed upward relative to the base portion (50) on an outer side in the vehicle width direction of the base portion (50),
The drainage rib (53) protrudes downward from the step portion (51),
3. The saddle-type vehicle according to claim 1, wherein the protrusion (52) protrudes downward from the step (51). 4. The saddle-type vehicle according to claim 3, wherein a lower surface portion (56) of the protruding portion (52) is in the form of a flat plate that is continuous with the base portion (50). The saddle-type vehicle according to claim 3 or 4, characterized in that the step (51) is an inclined surface that is inclined so as to be positioned upward as it approaches the outside in the vehicle width direction, and the water drainage rib (53) protrudes downward from the end of the step (51) on the outside in the vehicle width direction. 6. The saddle-type vehicle according to claim 1, wherein a lower end (53b) of the water drainage rib (53) is positioned higher than a lower end (56) of the protrusion (52). An inner rib (63) and an outer rib (64) connected to a rear end portion (53c) of the drainage rib (53) are provided on the lower surface of the undercover (40),
The inner rib (63) extends rearward and inward in the vehicle width direction from the rear end portion (53c),
7. The saddle-ride type vehicle according to claim 1, wherein the outer rib (64) extends rearward and outward in the vehicle width direction from the rear end portion (53c). A vehicle width direction rib (65) connected to a rear end portion (53d) of the drainage rib (53) and a front-rear direction rib (66) connected to the vehicle width direction rib (65) are provided on the lower surface of the undercover (40),
The vehicle width direction rib (65) extends inward in the vehicle width direction from the rear end portion (53d),
7. The saddle-ride type vehicle according to claim 1, wherein the longitudinal rib (66) extends forward of the vehicle from an inner end of the transverse rib (65) in the vehicle transverse direction. The saddle-type vehicle according to any one of claims 1 to 8, characterized in that a rear inclined surface (63c, 65c) is provided on the inside of the rear end (53c, 53d) of the water-skimming rib (53) in the vehicle width direction on the lower surface of the undercover (40), inclining downward toward the rear.

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