Straddle type vehicle

Abstract

The utility model provides a straddle type vehicle which can well rectify running wind penetrating through a gap between a front fairing and a side fairing by means of improvement of the shapes of parts. The straddle-type vehicle (1) is provided with a front fairing (9), a rear fairing (9) and a rear fairing (9), and a side cowl (12) disposed so as to overlap the front cowl (9) on the outside in the vehicle width direction with a predetermined gap (G) therebetween. Furthermore, an air guide part (51) extending in the front-back direction is arranged in the gap (G), and the front part of the air guide part (51) is provided with a first inclined part (55) inclined upwards towards the rear part of the vehicle body and a second inclined part (54) inclined upwards towards the rear part of the vehicle body from the rear part of the first inclined part (55). The first inclined part (55) is provided with a concave part or a convex part (60, 70).

Description

Technical Field

[0001] This utility model relates to a straddle-type vehicle, and more particularly to a straddle-type vehicle equipped with a front fairing and side fairings, the front fairing and side fairings being used to rectify the driving wind received from the front of the vehicle. Background Technology

[0002] Previously, a type of straddle-mounted vehicle was known, having: a front fairing that supports a headlight and covers a portion from the front of the vehicle body to the side; and side fairings that overlap and are disposed outside the front fairing in the vehicle width direction.

[0003] Patent document 1 discloses a structure in which a predetermined gap is provided between the front fairing and the side fairing, so that the driving wind passes through the gap and reduces the frontal projected area of ​​the vehicle body.

[0004] Prior art patent document 1: Japanese Patent Application Publication No. 2023-98362 Utility Model Content

[0005] [The problem that the utility model aims to solve]

[0006] However, when a gap is provided between the fairings as in Patent Document 1, the amount of airflow passing through the gap between the front and side fairings increases depending on the shape of the surrounding parts. This airflow tends to flow along the surface of the fuel tank located above and behind the side fairings. Therefore, it is desirable to improve the vehicle's responsiveness during bank roll by actively blocking this airflow. When the airflow enters the gap, it causes the airflow to accelerate. In this case, the airflow is not easily blocked from the vehicle body surface, so measures to reduce the flow velocity of the airflow are necessary. Widening the gap (increasing the flow path area) or filling the gap can be considered to block the airflow and reduce its velocity, but this would result in an increased frontal projected area.

[0007] The purpose of this invention is to solve the problems of the prior art and provide a straddle-type vehicle that can effectively regulate the airflow passing through the gap between the front fairing and the side fairing by improving the shape of the parts.

[0008] [Technical means to solve the problem]

[0009] To achieve the aforementioned objective, the first feature of this utility model is that a straddle-type vehicle (1) has: a front fairing (9) covering the front and side of the vehicle body; and a side fairing (12) overlapping the front fairing (9) in the vehicle width direction with a predetermined gap (G); a guide section (51) extending in the front-rear direction is provided in the aforementioned gap (G), the front part of the aforementioned guide section (51) has a first inclined portion (55) that is inclined upward toward the rear of the vehicle body, and a second inclined portion (54) that is inclined upward toward the rear of the vehicle body from the rear part of the aforementioned first inclined portion (55), and a concave portion or a convex portion (60, 70) is formed on the aforementioned first inclined portion (55).

[0010] In addition, the second feature is that the aforementioned air guide (51) has a third inclined portion (56) at the rear of the aforementioned first inclined portion (55) and / or the aforementioned second inclined portion (54), the third inclined portion (56) pointing in the front-rear direction of the vehicle body, the aforementioned second inclined portion (54) is composed of a plate-shaped component, and the rear end of the aforementioned second inclined portion (54) and the front end of the aforementioned third inclined portion (56) are separated by a distance in the vertical direction.

[0011] Furthermore, the third feature is that a front side flow path (W1) is formed between the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction, the inner side (12a) of the aforementioned side fairing (12) in the vehicle width direction, and the top surface of the aforementioned air guide (51), which guides the aforementioned driving air (W) to the rearward and upward. A bulging edge (9a) is formed on the aforementioned front fairing (9), which extends outward in the vehicle width direction as it tends to the rearward and is located above the aforementioned front side flow path (W1) and outward in the vehicle width direction. The aforementioned front side flow path (W1) extends obliquely outward in the vehicle width direction as it tends to the rearward.

[0012] In addition, the fourth feature is that the angle (θ2) between the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction and the aforementioned first inclined portion (55) is an acute angle.

[0013] In addition, the fifth feature is that the aforementioned air guide (51) is erected from the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction outward, and the aforementioned second inclined part (54) is designed to have a shape that decreases in the vehicle width direction as it moves towards the rear.

[0014] In addition, the sixth feature is that a duct (D) is formed below the aforementioned air guide (51) to guide the aforementioned driving air (W) downward, and a through hole (9c) is formed on the aforementioned front fairing (9) at a position in front of the rear flow path (W2).

[0015] In addition, the seventh feature is that at least a portion of the aforementioned recess or protrusion (60, 70) is provided on the top surface of the aforementioned second inclined portion (54).

[0016] Furthermore, the eighth feature is that the aforementioned concave or convex portion (60, 70) is a recess formed by a descending surface (61, 71) and an upright portion (62, 72). Compared to the top surface of the aforementioned air guide portion (51), the descending surface (61, 71) has a smaller inclination angle, and the upright portion (62, 72) rises upward from the rear end of the descending surface (61, 71).

[0017] In addition, the ninth feature is that the angle (θ1) between the top surface of the aforementioned air guide (51) and the aforementioned upright part (62,72) is approximately right angle.

[0018] Furthermore, the tenth feature is that the aforementioned upright portion (62, 72) points in the direction of vehicle width.

[0019] (Effects of the utility model)

[0020] According to the first feature, the straddle-type vehicle (1) has: a front fairing (9) covering the front and side of the vehicle body; and a side fairing (12) overlapping the front fairing (9) in the vehicle width direction with a predetermined gap (G); and a guide section (51) extending in the front-rear direction is provided in the aforementioned gap (G). The front part of the aforementioned guide section (51) has a first inclined section (55) that is inclined upward toward the rear of the vehicle body, and a second inclined section (54) that is inclined upward toward the rear of the vehicle body from the rear part of the aforementioned first inclined section (55). A concave or convex portion (60, 70) is formed on the aforementioned first inclined section (55). Therefore, the driving air flowing in the gap between the front fairing and the side fairing can be guided upward and backward by the first inclined section provided in the guide section, and the driving air flowing along the first inclined section is temporarily separated by the concave or convex portion and then dispersed upward and backward by the second inclined section. As a result, the airflow is rapidly separated upwards from the upper part of the air guide, which in particular improves the responsiveness when the vehicle body tilts due to cornering.

[0021] According to the second feature, the aforementioned air guide (51) has a third inclined portion (56) at the rear of the aforementioned first inclined portion (55) and / or the aforementioned second inclined portion (54), the third inclined portion (56) pointing in the front-rear direction of the vehicle body, the aforementioned second inclined portion (54) being composed of a plate-like member, and the rear end of the aforementioned second inclined portion (54) being separated from the front end of the aforementioned third inclined portion (56) by a distance in the vertical direction. Therefore, by making the third inclined portion discontinuous with the first and second inclined portions (separated by a distance in the vertical direction), the separation of driving air is promoted. In addition, for example, compared to a structure that further enlarges the concave or convex portion to promote the separation of driving air, by providing the second and third inclined portions composed of plate-like members, the separation of driving air can be achieved efficiently with less material.

[0022] According to the third feature, a front side flow path (W1) is formed between the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction, the inner side (12a) of the aforementioned side fairing (12) in the vehicle width direction, and the top surface of the aforementioned air guide (51) to guide the aforementioned driving air (W) to the rear and upward. A bulging edge (9a) is formed on the aforementioned front fairing (9). The bulging edge (9a) extends outward in the vehicle width direction as it tends to the rear and is located above the aforementioned front side flow path (W1) and outward in the vehicle width direction. The aforementioned front side flow path (W1) extends obliquely outward in the vehicle width direction as it tends to the rear. Therefore, by means of the shape of the front side flow path and the shape of the bulging edge, the driving air passing through the front side flow path is less likely to collide with the driver, thereby improving the driver's comfort.

[0023] According to the fourth feature, the angle (θ2) formed between the outer side (9b) of the front fairing (9) in the vehicle width direction and the first inclined part (55) is an acute angle. Therefore, the outer side of the front fairing in the vehicle width direction can be used to receive the driving wind, thereby efficiently guiding the driving wind to the front flow path.

[0024] According to the fifth feature, the aforementioned air guide (51) is erected vertically outward from the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction, and the aforementioned second inclined portion (54) is designed such that its size in the vehicle width direction decreases as it moves rearward. Therefore, the distance for guiding the driving air flowing along the outer side of the front fairing in the vehicle width direction can be extended, while simultaneously reducing the material constituting the second inclined portion. In addition, the gap between the second inclined portion and the inner side of the side fairing increases as it moves rearward, thereby allowing a portion of the driving air to flow from the front flow path to the rear flow path. Furthermore, by changing the shape of the second inclined portion, the amount of driving air flowing to the rear flow path can be easily adjusted. Moreover, since the gap between the second inclined portion and the inner side of the side fairing narrows at the forward position, the flow velocity of the driving air flowing in the front flow path increases, thereby enabling the driving air to flow rearward more efficiently.

[0025] According to the sixth feature, a duct (D) is formed below the aforementioned air guide (51) to guide the aforementioned driving air (W) downward. A through hole (9c) is formed on the aforementioned front fairing (9) at the position in front of the rear flow path (W2). Therefore, by providing a through hole on the front fairing, the negative pressure generated at the position in front of the rear flow path is reduced, thereby enabling the driving air to flow to the rear efficiently.

[0026] According to the seventh feature, at least a portion of the aforementioned recess or protrusion (60, 70) is provided on the top surface of the aforementioned second inclined portion (54). Therefore, by positioning the recess or protrusion at a position further back from the air guide portion, the driving air can be stripped away more efficiently.

[0027] According to the eighth feature, the aforementioned concave or convex portion (60, 70) is a recess formed by a descending surface (61, 71) and an upright portion (62, 72). Compared to the top surface of the aforementioned air guide portion (51), the descending surface (61, 71) has a smaller inclination angle. The upright portion (62, 72) rises upward from the rear end of the descending surface (61, 71). Therefore, by using the upright portion to change the travel path of the airflow flowing along the descending surface upward, the airflow can be effectively separated.

[0028] According to the ninth feature, the angle (θ1) between the top surface of the aforementioned air guide (51) and the aforementioned upright portion (62,72) is approximately right angle. Therefore, the travel wind flowing along the downward surface changes its travel path approximately directly upward by means of the upright portion, thereby enabling the travel wind to be separated more effectively.

[0029] According to the tenth feature, the aforementioned upright portion (62, 72) points in the vehicle width direction. Therefore, it can prevent the driving air flowing in the front flow path that extends obliquely outward in the vehicle width direction from being guided outward in the vehicle width direction and colliding with the inside of the side fairing, thus preventing the stripped driving air from returning to the top surface of the air guide portion. Attached Figure Description

[0030] Figure 1 This is a left-side view of a motorcycle according to one embodiment of the present invention.

[0031] Figure 2 This is the front view of the motorcycle.

[0032] Figure 3 This is a magnified front view of a motorcycle.

[0033] Figure 4 It is a drawing from Figure 3 A front view of the motorcycle with the lower side fairing removed.

[0034] Figure 5This is a magnified left-side view of the motorcycle with the lower fairing removed.

[0035] Figure 6 It is a three-dimensional diagram showing the state of the air deflector on the right side of the vehicle width when viewed from the front right.

[0036] Figure 7 yes Figure 5 Sectional view along line VII-VII.

[0037] Figure 8 yes Figure 7 Sectional view along line VIII-VIII.

[0038] Figure 9 yes Figure 7 A sectional view along line IX-IX.

[0039] Figure 10 yes Figure 5 XX-line sectional view.

[0040] Figure Labels

[0041] 1 Motorcycle (motorcycle type), 9 Front fairing, 9a Bulb edge, 9b Outer side of front fairing in the vehicle width direction, 9c Through hole, 12 Side fairing, 12a Inner side of side fairing in the vehicle width direction, 51 Air guide, 54 Second inclined part, 55 First inclined part, 56 Third inclined part, 60, 70 Recess (shape change part), 61, 71 Lowering surface, 62, 72 Standing part, θ1 Angle between the top surface of the air guide and the standing part, θ2 Angle between the outer side of the front fairing in the vehicle width direction and the first inclined part, G Gap, D Pipe, W Running air, W1 Front side flow path, W2 Rear side flow path. Detailed Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Figure 1 This is a left-side view of a motorcycle 1 according to one embodiment of the present invention. Additionally, Figure 2 This is a front view of motorcycle 1. Motorcycle 1 is a straddle-type vehicle that transmits the driving force of power unit P to the rear wheel WR via transmission chain 23. The power unit P is an integrated internal combustion engine and transmission.

[0043] At the front end of the pair of main frames F2 that constitute the vehicle frame F, a head pipe F1 is provided to pivot a steering stem (not shown) for free rotation. At the upper and lower ends of the steering stem, an upper crossbeam 6 and a lower crossbeam 13 are respectively fixed to support the pair of front forks 14.

[0044] At the lower end of the front fork 14, the front wheel WF is pivotally supported for free rotation. A front fender 15 is mounted on the front fork 14 to cover the top of the front wheel WF. A steering wheel 3 is fixed to the upper part of the upper crossbeam 6 to support a pair of left and right rearview mirrors 4. A pair of left and right knuckle guards 5 are provided in front of the grip portion of the steering wheel 3. A front fairing 9 is provided in front of the head tube F1, which has an opening facing the headlight 11. A pair of left and right side fairings 12 are provided on the outer side of the front fairing 9 in the vehicle width direction.

[0045] A windshield 8 is supported on the upper part of the front fairing 9, and an instrument panel 7 is mounted on the rear side of the windshield 8. A pair of left and right front hazard lights 10, functioning as turn indicators, side marker lights, or hazard lamps, are supported by mounting holes provided on the front fairing 9. At the rear of the side fairing 12, an exhaust vent 17 is provided for the airflow from the duct D (described later) and the front of the vehicle. A radiator 32 is mounted in front of the power unit P, and an inner fairing 30 is mounted inside the side fairing 12 in the vehicle width direction, the inner fairing 30 having an edge surrounding the radiator 32. At the upper part of the inner fairing 30, a pair of left and right air intakes 31 are provided, each with multiple louvers.

[0046] A fuel tank 2 is mounted on the upper part of the main frame F2. At the lower rear end of the main frame F2, which extends downwards and rearwards from the front tube F1, a pair of left and right pivot frames F4 are connected to support a pivot 18, which pivots the rocker arm 22 for free swinging. A pair of left and right step bars 20 are mounted on the pivot frames F4 for the driver to place their feet. A shift pedal 19 and a side bracket 21 are supported on the lower part of the left pivot frame F4 in the vehicle width direction. A brake pedal 37 is mounted in front of the step bar 20 on the right side in the vehicle width direction.

[0047] The power unit P, equipped with an exhaust pipe 16 that directs combustion gases from the internal combustion engine to the muffler 33 on the right side in the vehicle width direction, is suspended between a pair of left and right hangers F3 extending rearward and downward from a position below the front pipe F1 and a pivot frame F4. A rocker arm 22, pivotally supporting the rear wheel WR, is positioned forward and suspended from the main frame F2 by a rear bumper 35. A rear frame F5, extending rearward and upward from the main frame F2, supports the driver's seat 29 and the rear fairing 28, which supports the grip bar 27 and taillight assembly 24. A rear fender 24 is mounted at the lower rear end of the rear fairing 28 to support a pair of left and right rear flashers 24.

[0048] Figure 3 This is a magnified front view of motorcycle 1. Additionally, Figure 4 It is a drawing from Figure 3 A front view of the motorcycle 1 with the side fairing 12 removed. The same symbols as described above indicate the same or equivalent parts. The front fairing 9 and the side fairing 12 disposed on the outer side of the front fairing 9 in the vehicle width direction can each be formed from a thin sheet of synthetic resin or the like. The front end of the side fairing 12 is fixed to the front fairing 9 by means of locking components such as screws.

[0049] A predetermined gap G is provided between the front fairing 9 and the side fairing 12. An upright mounting portion 50 is provided within the gap G, extending outwards from the outer side 9b of the front fairing 9 in the vehicle width direction. Below the upright mounting portion 50 is a pipe D, located between the front fairing 9 and the side fairing 12, which guides airflow from the front. A bulge 9a is formed on the front fairing 9, tilting rearwards and upwards and extending outwards in the vehicle width direction.

[0050] Simultaneously refer to Figure 4 An air guide section 51 is formed on the top surface of the vertically mounted portion 50, which guides the driving air introduced from the gap G upwards and backwards. The upper end of the side fairing 12 is located lower than the upper end of the front fairing 9, and the air guide section 51 is located lower than the upper end of the side fairing 12. The air guide section 51 is shaped to slope upwards and backwards and outwards in the vehicle width direction. The driving air introduced from the gap G passes through the front side flow path W1 (refer to...). Figure 5 The flow path W1 is guided to the rear and upper part of the front fairing 9 and formed on the outer side 9b of the front fairing 9 in the vehicle width direction and the inner side 12a of the side fairing 12 in the vehicle width direction (see reference). Figure 7 Between the top surface of the air guide section 51 and the front flow path W1 passes through the roughly U-shaped space open above.

[0051] Figure 5This is a partially enlarged left-side view of the motorcycle 1 with the lower fairing 12 removed. The same symbols as described above denote the same or equivalent parts. The airflow W received from the front of the motorcycle 1 is rectified and flows rearward through several flow paths. The airflow W introduced from the gap G between the front fairing 9 and the side fairing 12 is guided to the upper rear by the front flow path W1 passing above the upright section 50. A rear flow path W2 is formed behind the upright section 50 to guide the airflow W rearward. Furthermore, a lower flow path W3 is formed below the upright section 50 to guide the airflow W introduced from the pipe D to the lower rearward. Below the lower flow path W3, a hot air flow path W4 is formed, which guides the airflow W introduced from the intake 31 of the inner fairing 30 and the air heated by the radiator 32 to the lower rearward.

[0052] The bulge edge 9a of the front fairing 9 is located above the front flow path W1 and outward in the vehicle width direction. Additionally, a through hole 9c is formed on the front fairing 9, near the rear flow path W2, and this through hole 9c is elongated in the longitudinal direction. Below the through hole 9c, a connecting hole 9d is formed, communicating with the duct D. The connecting hole 9d is connected to the rear of the lower flow path W3. The airflow introduced from the duct D passes through the lower flow path W3, branching into an upward flow toward the connecting hole 9d and a downward flow toward the radiator 32. The upward flow toward the connecting hole 9d merges at the rear of the rear flow path W2. This allows for more efficient introduction of airflow from the duct D. A locking component 53, such as a screw, is screwed onto the rear of the upright mounting portion 50 to support the front fairing 9 against the vehicle body side.

[0053] Figure 6 This is a perspective view showing the state of the air guide 51 on the right side in the vehicle width direction as viewed from the right front. The same symbols as described above indicate the same or equivalent parts. At the front of the air guide 51, there is a first inclined portion 55 that slopes upwards and backwards from the front end of the air guide 51 in a side view of the vehicle. Additionally, at the rear of the air guide 51, there is a second inclined portion 54 that slopes upwards and backwards in a side view of the vehicle. Furthermore, the first inclined portion 55 has a front recess 60 and a rear recess 70, serving as recesses or protrusions that allow the driving air W flowing along the top surface of the air guide 51 in the front flow path W1, i.e., the driving air W passing through the front flow path W1, to be separated upwards. A locking member 52 is provided below the first inclined portion 55 for fixing the side fairing 12 to the front fairing 9.

[0054] The front recess 60 and rear recess 70, which are shape-changing parts, are respectively configured as recesses formed by descending surfaces 61, 71 and upright portions 62, 72. Compared to the top surface of the air guide 51, the descending surfaces 61, 71 have a smaller inclination angle, and the upright portions 62, 72 rise upward from the rear end of the descending surfaces 61, 71. In this embodiment, the front recess 60 is formed at a position slightly in front of the first inclined portion 55, and the rear recess 70 is formed at a position slightly behind the first inclined portion 55 and close to the second inclined portion 54. Here, when there is only one shape-changing part, a portion of the driving air that is separated from the shape-changing part and moved upward can easily approach the surface of the air guide 51 again from the rear. However, in this embodiment, by providing two shape-changing parts at the front and rear, even if a portion of the driving air that is separated from the front recess 60 and moved upward approaches the surface of the air guide 51 again, it can be efficiently separated upward using the rear recess 70.

[0055] Furthermore, in this embodiment, the second inclined portion 54 located at the rear of the air guide portion 51 is composed of a plate-shaped member, and has a shape that extends along the extending direction of the first inclined portion 55 at a distance from the rear flow path W2 above. As a result, the driving air separated by the front recess 60 and the rear recess 70 can be efficiently dispersed to the rear and upper.

[0056] Above the through hole 9c, a third inclined portion 56 is provided, which is composed of a plate-shaped member erected outward in the vehicle width direction. The front end of the third inclined portion 56 is positioned at a distance from the rear end of the second inclined portion 54 in the vertical direction. Thus, by providing the first inclined portion 55 and the second inclined portion 54 extending in their extension direction, and by making the third inclined portion 56 discontinuous with the first inclined portion 55 and the second inclined portion 54 (vertically spaced), the stripping of driving wind is promoted.

[0057] Figure 7 yes Figure 5 The cross-sectional view along line VII-VII. The same symbols as described above denote the same or equivalent parts. As mentioned earlier, the front airflow path W1 extends outwards in the vehicle width direction, corresponding to the shape of the air guide 51, towards the rear. This reduces the likelihood of wind passing through the front airflow path hitting the driver, improving driver comfort. Furthermore, the bulge edge 9a of the front fairing 9 is located outside the width direction of the front airflow path W1 in a top-down view of the vehicle. Therefore, the air guide 51 is obscured by the bulge edge 9a in a top-down view, improving the appearance of the motorcycle 1. Moreover, the air guide 51 is obscured by the front fairing 9 and the side fairings 12 in side, top, rear, and bottom views of the vehicle, thus improving the appearance in all directions.

[0058] Furthermore, the second inclined portion 54, which serves as a guide plate, has the following shape: its width dimension decreases as it moves rearward relative to the front fairing 9, and the outer end of the second inclined portion 54 in the vehicle width direction is spaced apart from the side fairing 12 corresponding to this decrease in size. This extends the distance at which the airflow flowing along the outer side of the front fairing 9 in the vehicle width direction can be guided, while simultaneously reducing the amount of material constituting the second inclined portion 54. Additionally, the gap between the second inclined portion 54 and the inside of the side fairing 12 increases as it moves rearward, allowing a portion of the airflow passing through the front side flow path W1 to flow into the rear side flow path W2. Furthermore, since the gap between the second inclined portion 54 and the inside of the side fairing 12 narrows towards the front, the gap towards the front (which is downward in the vertical direction due to the upward and rearward inclination) becomes smaller, resulting in a relatively high airflow velocity near the through-hole 9c, thereby allowing the airflow inside the fairing to be drawn out.

[0059] Furthermore, while the front airflow path W1 extends rearward and outward in the vehicle width direction, the upright portions 62 and 72 point at an angle close to the vehicle width direction. This prevents the airflow flowing in the front airflow path W1 from being guided outward in the vehicle width direction and colliding with the inner side of the side fairing 12 (i.e., the inner side 12a in the vehicle width direction), thus preventing the separated airflow from returning to the top surface of the air guide portion 51. Additionally, the front recess 60 and the rear recess 70 are formed in a manner that they do not contact the outer side 9b in the vehicle width direction of the front fairing 9. This makes the front recess 60 and the rear recess 70 less visible from the outside.

[0060] Figure 8 yes Figure 7 Sectional view along line VIII-VIII. The same symbols as above indicate the same or equivalent parts. The vertical mounting part 50, integrally formed with the front fairing 9, is a hollow structure. The top surface of the air guide part 51 is a gently curved shape that bulges forward and upward from the front end of the first inclined part 55 to the rear end of the second inclined part 54.

[0061] The raised portions 62 and 72 of the front recess 60 and the rear recess 70 are slightly inclined forward relative to the vertical direction. Furthermore, in this embodiment, the top surface of the air guide 51 is configured such that the angle θ1 formed by the raised portions 62 and 72 is approximately right-angled. Therefore, the airflow flowing along the descending surfaces 61 and 71 is redirected to approximately directly upwards by the raised portions 62 and 72, thereby more effectively separating the airflow.

[0062] Additionally, in the rear flow path W2 (refer to...) Figure 5 The front fairing 9 has a through hole 9c at the front position, which reduces the negative pressure generated at the front position of the rear flow path W2, thereby enabling the driving air to flow efficiently to the rear.

[0063] Figure 9 yes Figure 7 A cross-sectional view along line IX-IX. Additionally... Figure 10 yes Figure 5 The XX-line cross-sectional view. The same symbols as described above indicate the same or equivalent parts. As mentioned earlier, the upright setting part 50 is a hollow structure, and the side of the upright setting part 50 abuts against the inner side 12a of the side fairing 12 in the vehicle width direction. At the upper end of the side fairing 12, a fold-back part 12b is provided inward in the vehicle width direction to prevent the driving air passing through the front side flow path W1 from escaping upward. In addition, in this embodiment, in order to facilitate the demolding of the front fairing 9 manufactured by injection molding using a mold, the first inclined part 55 is slightly inclined downward towards the outer side in the vehicle width direction. Furthermore, in this embodiment, the angle θ2 formed between the outer side 9b of the front fairing 9 in the vehicle width direction and the first inclined part 55 is an acute angle, so it is easy to receive the driving air by the outer side 9b of the front fairing 9 in the vehicle width direction, and it is possible to efficiently guide the driving air into the front side flow path W1.

[0064] As described above, the fairing structure according to this utility model includes an air guide portion 51, which is disposed in the gap G between the front fairing 9 and the side fairing 12 and extends in the front-rear direction. At the upper part of the air guide portion 51, a first inclined portion 55 is provided, which is inclined upward and rearward in a side view of the vehicle body. At the rear part of the air guide portion 51, a second inclined portion 54 is provided, which is inclined upward and rearward in a side view of the vehicle body. In the first inclined portion 55, shape-changing portions 60 and 70 are formed to separate the driving air W flowing along the top surface of the air guide portion 51 upward. Therefore, the driving air W flowing in the gap G between the front fairing 9 and the side fairing 12 can be guided upward and rearward by the first inclined portion 55 provided in the air guide portion 51, and the driving air W flowing along the first inclined portion 55 can be temporarily separated by the shape-changing portions 60 and 70 and then dispersed upward and rearward by the second inclined portion 54. Therefore, for example, if the driving wind W flowing along the air guide 51 is not separated from the rear end of the air guide 51, this driving wind W may affect the handling stability of the vehicle body. However, by rapidly separating the driving wind W from the upper part of the air guide 51 upwards, the handling stability when the vehicle body tilts due to cornering can be improved.

[0065] Furthermore, behind the air guide section 51, there is a rear flow path W2 that points in the front-back direction and guides the travel air W to the rear. The second inclined section 54 is made of a plate-shaped member and has a shape that extends along the extending direction of the first inclined section 55 at a distance from the rear flow path W2 above. Therefore, for example, compared to a structure that further enlarges the shape change section 60, 70 to promote the separation of travel air, by providing the second inclined section 54 made of a plate-shaped member, the travel air W can be separated efficiently with less material.

[0066] Furthermore, a front side flow path W1 is formed between the outer side 9b of the front fairing 9 in the vehicle width direction, the inner side 12a of the side fairing 12 in the vehicle width direction, and the top surface of the air guide 51, which guides the driving air W to the rearward and upward. A bulging edge 9a is formed on the front fairing 9. The bulging edge 9a extends outward in the vehicle width direction as it tends to the rear and is located above the front side flow path W1 and outward in the vehicle width direction. The front side flow path W1 extends obliquely outward in the vehicle width direction as it tends to the rear. Therefore, by means of the shape of the front side flow path W1 and the shape of the bulging edge 9a, the driving air passing through the front side flow path W1 is less likely to collide with the driver, thereby improving the driver's comfort.

[0067] In addition, the angle θ2 formed by the outer side 9b of the front fairing 9 in the vehicle width direction and the first inclined portion 55 is an acute angle. Therefore, the outer side 9b of the front fairing 9 in the vehicle width direction can easily receive the driving wind W, thereby efficiently guiding the driving wind W to the front flow path W1.

[0068] Furthermore, the air guide section 51 is vertically installed from the outer side 9b of the front fairing 9 in the vehicle width direction outwards. The second inclined section 54 has a shape that decreases in size in the vehicle width direction as it moves rearwards. Therefore, the distance for guiding the driving air W flowing along the outer side 9b of the front fairing 9 in the vehicle width direction can be extended, while simultaneously reducing the material used to construct the second inclined section 54. In addition, the gap between the second inclined section 54 and the inner surface of the side fairing 9 increases as it moves rearwards, allowing a portion of the driving air W to flow from the front flow path W1 to the rear flow path W2. Furthermore, by changing the shape of the second inclined section 54, the amount of driving air W flowing towards the rear flow path W2 can be easily adjusted. Moreover, since the gap between the second inclined section 54 and the inner surface of the side fairing 9 narrows towards the front, the flow velocity of the driving air flowing in the front flow path W1 increases, thereby enabling the driving air W to flow rearwards more efficiently.

[0069] In addition, a pipe D is formed below the air guide section 51 to guide the driving air W downward. A through hole 9c is formed on the front fairing 9 at the position in front of the rear flow path W2. Therefore, by providing the through hole 9c on the front fairing 9, the negative pressure generated at the position in front of the rear flow path W2 is reduced, thereby enabling the driving air W to flow to the rear efficiently.

[0070] In addition, at least a portion of the shape-changing portions 60 and 70 are provided on the top surface of the second inclined portion 54. Therefore, by positioning the shape-changing portions 60 and 70 at a position behind the air guide portion 51, the driving air W can be separated more efficiently.

[0071] Furthermore, the shape-changing portions 60 and 70 are recesses formed by the descending surfaces 61 and 71 and the upright portions 62 and 72. Compared to the top surface of the air guide portion 51, the angle of inclination of the descending surfaces 61 and 71 is smaller. The upright portions 62 and 72 rise upward from the rear end of the descending surfaces 61 and 71. Therefore, by using the upright portions 62 and 72 to change the travel path of the airflow W flowing along the descending surfaces 61 and 71 upward, the airflow W can be effectively separated.

[0072] In addition, the angle θ1 formed by the top surface of the air guide 51 and the upright parts 62, 72 is approximately right angle. Therefore, the travel wind W flowing along the descending surface 61, 71 changes its travel path approximately directly upward by the upright parts 62, 72, thereby more effectively separating the travel wind W.

[0073] Furthermore, since the uprights 62 and 72 point in the vehicle width direction, it can prevent the driving air W flowing in the front flow path W1, which extends backward and outward in the vehicle width direction, from colliding with the inside of the side fairing 12 and causing the detached driving air W to return to the top surface of the air guide 51.

[0074] The motorcycle's shape, the shape and structure of the front and side fairings, the shape of the air guide, the shape and arrangement of the shape-changing section, and the shape of the front and rear flow paths are not limited to the above-described embodiments and can be modified in various ways. For example, the vertically mounted section with the air guide can be separately mounted from the front fairing or integrally formed with the side fairing. Furthermore, the shape-changing section is not limited to the recess described above; it can also be a plate-like component or a bulge mounted vertically upwards, and its number can be one or more. Moreover, the shape of the top surface of the air guide can be either entirely curved or has two flat sections before and after the curved section. Furthermore, the shape-changing section can be omitted, and only the second inclined section can be used, or the air guide can be made to point horizontally or approximately horizontally. The fairing structure of this invention is not limited to motorcycles but can also be applied to various vehicles such as straddle-type tricycles or four-wheeled vehicles.

Claims

1. A straddle-type vehicle (1), characterized in that, It has: a front fairing (9) covering the front and sides of the vehicle body; and a side fairing (12) overlapping and disposed on the outside of the front fairing (9) in the vehicle width direction with a specified gap (G); An air guide (51) extending in the front-to-back direction is provided in the aforementioned gap (G). The front part of the aforementioned air guide (51) has a first inclined portion (55) that slopes upward toward the rear of the vehicle body, and a second inclined portion (54) that slopes upward toward the rear of the vehicle body from the rear of the aforementioned first inclined portion (55). A recess or a protrusion (60, 70) is formed on the aforementioned first inclined portion (55).

2. The straddle-type vehicle according to claim 1, wherein, The aforementioned air guide (51) has a third inclined portion (56) at the rear of the aforementioned first inclined portion (55) and / or the aforementioned second inclined portion (54), the third inclined portion (56) pointing in the front-rear direction of the vehicle body. The aforementioned second inclined portion (54) is composed of a plate-shaped component. The rear end of the aforementioned second inclined portion (54) and the front end of the aforementioned third inclined portion (56) are separated by a distance in the vertical direction.

3. The straddle-type vehicle according to claim 1 or 2, wherein, A front side flow path (W1) with an open end at the top is formed by the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction, the inner side (12a) of the aforementioned side fairing (12) in the vehicle width direction, and the top surface of the aforementioned air guide (51). A bulge (9a) is formed on the aforementioned front fairing (9), the bulge (9a) extending outward in the vehicle width direction as it moves rearward, and is located above the aforementioned front flow path (W1) and outward in the vehicle width direction. The aforementioned front flow path (W1) extends outwards in the vehicle width direction as it moves towards the rear.

4. The straddle-type vehicle according to claim 3, wherein, The angle (θ2) formed between the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction and the aforementioned first inclined portion (55) is an acute angle.

5. The straddle-type vehicle according to claim 3, wherein, The aforementioned air guide (51) is vertically installed from the outer side (9b) of the aforementioned front fairing (9) in the vehicle width direction outwards. The aforementioned second inclined portion (54) is designed to have a shape in which the width dimension decreases as it moves toward the rear.

6. The straddle-type vehicle according to claim 2, wherein, On the aforementioned front fairing (9), a through hole (9c) is formed at a position in front of the rear flow path (W2).

7. The straddle-type vehicle according to claim 1 or 2, wherein, At least a portion of the aforementioned recess or protrusion (60, 70) is provided on the top surface of the aforementioned second inclined portion (54).

8. The straddle-type vehicle according to claim 1 or 2, wherein, The aforementioned recess or convex portion (60, 70) is a depression formed by a descending surface (61, 71) and an upright portion (62, 72). Compared to the top surface of the aforementioned air guide portion (51), the descending surface (61, 71) has a smaller inclination angle, and the upright portion (62, 72) rises upward from the rear end of the descending surface (61, 71).

9. The straddle-type vehicle according to claim 8, wherein, The angle (θ1) between the top surface of the aforementioned air guide (51) and the aforementioned upright part (62,72) is approximately right angle.

10. The straddle-type vehicle according to claim 9, wherein, The aforementioned uprights (62, 72) point in the direction of vehicle width.

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