JP5703183B2 - Scooter type motorcycle - Google Patents

Description

  According to the present invention, a power unit having an engine and a transmission device that transmits rotational power from a crankshaft rotatably supported by a crankcase of the engine to a rear wheel is supported on a vehicle body frame so as to be swingable. A cover member having a cooling air introduction port that opens toward the vehicle is supported by the crankcase so as to be disposed on one side in the vehicle width direction of the crankcase, and is cooled from the cooling air introduction port to the crankcase side. A cooling fan for sucking wind is interlocked and connected to the crankshaft so as to be covered with the cover member, and a step floor disposed in front of the power unit and connected to both the left and right sides of the step floor and below. A scooter type motorcycle in which a part of a vehicle body cover that covers the vehicle body frame is composed of a pair of left and right skirt portions depending on the vehicle. Car on.

  A radiator is arranged on one side of the engine crankcase in the vehicle width direction, a cover member having a cooling air introduction port is supported by the crankcase so as to cover the radiator, and a cooling air is applied to the radiator for cooling. Patent Document 1 discloses that a lower body cover that hangs downward from a floor and covers the cover member from the outside is provided with a cooling air guide hole for guiding cooling air to a cooling air introduction port. Yes.

WO2011 / 027446 pamphlet

  However, in the one disclosed in Patent Document 1, it is necessary to provide a cooling air guide hole in the lower body cover, and the processing of the lower body cover tends to be complicated. Further, when the diameter of the cooling air guide hole is increased in order to take in a large amount of cooling air, the rigidity of the lower body cover may be reduced around the cooling air guide hole.

  The present invention has been made in view of such circumstances, and can efficiently reduce the rigidity of the vehicle body cover while allowing the vehicle body cover to be easily molded, and efficiently supply the cooling air to the cooling air inlet of the cover member. An object of the present invention is to provide a scooter type motorcycle that can be guided.

In order to achieve the above object, according to the present invention, there is provided a power unit having an engine and a transmission that transmits rotational power from a crankshaft rotatably supported by a crankcase of the engine to a rear wheel. A cover member that is movably supported and has a cooling air introduction port that opens outward is supported by the crankcase so as to be disposed on one side in the vehicle width direction of the crankcase, and the cooling air introduction A cooling fan that sucks cooling air from the mouth to the crankcase side is coupled to and connected to the crankshaft so as to be covered with the cover member, and a step floor disposed in front of the power unit; A part of the vehicle body cover that covers the vehicle body frame with a pair of left and right skirt portions that are provided on both the left and right sides and hang downward. In a scooter type motorcycle to be made, at least a portion of said cover member, all of the cooling air inlet to the outside at the rear than the rear end of the skirt portion of the vehicle width direction on one side of the two skirt portions A cooling air guide recess that guides the cooling air toward the cover member is formed at least at the rear of the skirt so as to be recessed inward in the vehicle width direction. And a wind guide protrusion provided on the outer surface of the cover member so as to protrude outward in the vehicle width direction extends in the front-rear direction in a direction extending rearward of the upper edge portion of the cooling wind guide recess. A first feature is that it has at least a longitudinally extending protrusion and is formed so as to guide the cooling air from the cooling air guide recess to the cooling air inlet.

The present invention, in addition to the first feature, in that the longitudinal direction extending projection in correspondence with the cooling air baffle recess which is inclined rearwardly upwards is also formed to be inclined rearwardly upwards first Two features.

The present invention, in addition to the configuration of the first or second feature, the rear portion of the skirt portion of the vehicle width direction on one side, the downward extension that extends lower than the lower end of the cover member in a side view A third feature is that the protruding portion is integrally formed.

According to the present invention, in addition to any one of the first to third features, the wind guide protrusion extends downward from the rear end of the front-rear extending protrusion behind the cooling air inlet. According to a fourth aspect of the present invention, there is provided a vertically extending protrusion that protrudes from the outer surface of the cover member.

According to the present invention, in addition to the configuration of the fourth feature, the wind guide protrusion extends in the front-rear direction below the cooling air inlet, and the front-rear direction extending protrusion and the up-down direction extending protrusion. In a substantially U-shape that protrudes forward from the lower front-rear extending projection that projects from the outer surface of the cover member and whose rear end is connected to the lower end of the up-down extending projection. is constructed, that the front end of the longitudinal extension protrusion, the front end of the lower longitudinal direction extending projection is arranged close to the rear end of the skirt portion of the vehicle width direction on one side 5 It is characterized by.

In the present invention, in addition to any of the configurations of the first to fifth features, the folding pillion step overlaps the cover member from the outside above the front-rear extending protrusion in a side view. The sixth feature is that they are arranged as described above.

According to the present invention, in addition to the structure of the sixth feature, the cover member has a second cooling air introduction port disposed above the front-rear direction extending protrusion, at least partially in a side view. A seventh feature is that the pillion step is provided so as to overlap from the outside.

According to the present invention, in addition to any one of the first to seventh features, the cover member is disposed in the vehicle width direction in a plan view from the vehicle width direction outer end of the skirt portion on one side in the vehicle width direction. It is an eighth feature that it is arranged on the other side.

In addition to any of the configurations of the first to eighth features of the present invention, the front-rear direction extending protrusion that extends in the front-rear direction in the extending direction toward the rear of the upper edge portion of the cooling air guide recess is, A ninth feature is that the cover member is formed such that the amount of protrusion from the outer surface of the cover member increases toward the rear.

In addition to the configuration of the fourth or fifth feature, the present invention is formed such that the vertically extending protrusion is inclined so as to be in a forward position toward the protruding end from the outer surface of the cover member. This is the tenth feature.

The eleventh feature of the present invention is that, in addition to any one of the first to tenth features, a radiator is disposed between the cooling fan and the cover member so as to be covered with the cover member. to.

In the present invention, in addition to the configuration of the eleventh feature, the louver disposed in the cooling air introduction port having a shielding wall projecting rearward from the front portion of the cooling air introduction port in a side view is a plane. The twelfth feature is that the cover member is provided so as to approach the radiator as viewed from the front.

In addition to any one of the first to twelfth features of the present invention, the front end of the front-rear direction extending protrusion is disposed inward in the vehicle width direction from the cooling air guide recess as seen in a plan view. This is a thirteenth feature.

In addition to any one of the first to thirteenth features of the present invention, the vehicle width direction outer end of the front-rear direction extending protrusion is, in plan view, the vehicle width direction relative to the cooling air guide recess. The fourteenth feature is that it is arranged outward.

Furthermore, in addition to any one of the configurations of the first to fourteenth aspects, the present invention is configured such that the front end of the front-rear extending protrusion is disposed below the upper edge of the cooling air guide recess in a side view. A fifteenth feature is that substantially the entire upper, lower, and rear sides of the cooling air inlet are surrounded by the air guide protrusions.

According to a first aspect of the present invention, the rear of the skirt portion in the vehicle width direction on one side, some even without least of the cover member, all of the cooling air inlet at the rear than the rear end of the skirt portion Rutotomoni disposed so as to face to the outside, at least the rear portion of the skirt portion, the cooling air air guide recess for guiding the cooling air to the cover member side is formed, the outer surface of the cover member, the front-rear direction extending in the longitudinal direction Since the air guide protrusion having at least the extending protrusion is provided so as to protrude outward in the vehicle width direction, the cooling air from the cooling air guide recess is guided to the cooling air inlet by the air guide protrusion. the simple configuration in can be guided efficiently cooling air to the cooling air inlet of the cover member Rutotomoni, cooling to the vehicle body cover located to the rear of the rear end of the total cooling air inlet is said skirt portion since there is no need to Ru provided with a wind guide hole, car While easily moldable the cover can be avoided stiffness reduction of the body cover. In addition, the front-rear extension protrusion extends in the front-rear direction in the rearward extension direction of the upper edge of the cooling air guide recess, so that the cooling air from the cooling air guide recess is more effectively extended in the front-rear direction. In addition to being able to be received by the protruding portion, the skirt portion and the cover member have a design surface that gives a continuous impression in the front-rear direction, and a sporty appearance can be produced to enhance product appeal.

Also, that all of the cooling air inlet is arranged so as to face the outside without being covered by the skirt portion, it is possible to hot air from the engine side hardly cooling air inlet sucks.

According to the second feature of the present invention, the cooling air guide recess and the longitudinally extending protrusion are formed so as to incline rearwardly, so that the traveling air from the front is used as the cooling air for the cooling air inlet. Can guide well.

According to the third feature of the present invention, the downward extending portion formed integrally with the rear portion of the skirt portion on one side in the vehicle width direction extends downward from the lower end of the cover member in a side view. Cooling air can be guided from the front skirt portion to the entire member.

According to the fourth feature of the present invention, the air guide protrusion includes a vertically extending protrusion extending downward from the rear end of the front and rear direction extending protrusion behind the cooling air introduction port. The cooling air can be guided to the cooling air introduction port more efficiently by receiving the cooling air flowing backward from the front skirt portion of the cover member by the vertically extending protrusion.

According to the fifth feature of the present invention, the wind guide protrusions extend in the front-rear direction, the vertical extension protrusions, the front-rear extension protrusions, and the vertical extension protrusions below the cooling air inlet. The lower front and rear projecting protrusions that are continuous with the lower end of the cover are configured in a substantially U shape that opens forward, so that the wind guide protrusion of the cover member, the cooling wind guide recess of the skirt portion, The front end of the upper front-rear extending protrusion is more than the front end of the lower front-rear extending protrusion at the rear end of the skirt part in front of the cover member. Since they are arranged close to each other, it is possible to easily guide the traveling air flowing from the lower part of the skirt portion to the cooling air inlet, and to guide the cooling air to the cooling air inlet more efficiently.

According to the sixth aspect of the present invention, the folding pillion step is disposed so as to overlap the cover member from the outside above the upper front-rear extending protrusion in a side view. Thus, the upper front-rear extension protrusion is not hidden, and the design can be ensured. The pillion step does not obstruct the intake of the traveling wind into the cooling air inlet.

According to the seventh feature of the present invention, since the second cooling air introduction port arranged above the front-rear extending protrusion is provided in the cover member, the cooling air introduction possible area in the cover member is expanded. In addition, since the pillion step overlaps at least a part of the second cooling air introduction port from the outside in a side view, it is not necessary to provide a special protection member, and the second cooling air introduction port is formed in the pillion step. Can be effectively protected.

According to the eighth feature of the present invention, the cover member is disposed inward in the vehicle width direction in a plan view from the outer end in the vehicle width direction of the skirt portion in front of the cover member. Compared to the case where the cover member is arranged outside the outer end of the front skirt portion in consideration of the introduction of the traveling wind, the width of the power unit along the vehicle width direction is reduced, and the cooling air of the cover member is reduced. Cooling air can be taken into the inlet.

According to the ninth feature of the present invention, since the upper front-rear extending protrusion is formed so that the protrusion amount from the outer surface of the cover member increases toward the rear, the cooling air introduction port is cooled. It becomes easier to guide the wind.

According to the tenth feature of the present invention, the vertically extending protrusion that receives the cooling air flowing backward from the front skirt portion of the cover member becomes the forward position as it goes to the protruding end from the outer surface of the cover member. Thus, the cooling air can be more effectively received by the vertically extending protrusions, and the cooling air can be more effectively guided to the cooling air introduction port.

According to the eleventh feature of the present invention, since the radiator covered with the cover member is disposed between the cooling fan and the cover member, the radiator can be effectively cooled with cooling air, which is suitable for a water-cooled engine. is there.

Furthermore, according to the twelfth feature of the present invention, the louver approaching the radiator as it goes forward is provided on the cover member with a shielding wall that closes the front portion of the cooling air inlet, so that the radiator is protected. In particular, the shielding wall provided at the front portion of the cover member adjacent to the radiator can prevent the water with high water pressure from directly hitting the radiator during car washing or the like, thereby effectively protecting the radiator.

1 is a side view of a scooter type motorcycle. FIG. It is a cross section of a power unit. It is a principal part enlarged view of FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a cross-sectional top view which shows the relative arrangement | positioning of a cover member and a skirt part.

  Embodiments of the present invention will be described with reference to FIGS. In the following description, the front and rear, the top and bottom, and the left and right directions are directions as viewed from the occupant riding the motorcycle.

  First, in FIG. 1, a body frame F of a scooter type motorcycle includes a head pipe 11 at the front end thereof, a main frame 12 having a front end portion coupled to the head pipe 11, and the main frame 12 extending in the vehicle width direction. A cross pipe 13 provided at the rear part and a pair of left and right rear frames 14 each having a front end part connected to both ends of the cross pipe 13 are provided.

  A front fork 15 that supports the front wheel WF and a rod-shaped steering handle 16 are supported on the head pipe 11 so as to be steerable. The main frame 12 integrally includes a down frame portion 12a inclined downward from the head pipe 11 and a lower frame portion 12b extending substantially rearward from the rear end of the down frame portion 12a. One pipe is formed by bending. The rear frame 14 is inclined upward and backward from the cross pipe 13 and extends upward, and the rear frame 14 extends upward from the upper end of the rising frame portion 14a at a gentler inclination angle than the rising frame portion 14a. The seat rail portion 14b that is inclined and extends rearward is integrally formed, and a single pipe is formed by bending.

  One end of the body frame F is attached to the bracket 101 provided at the front part of the rear frames 14..., That is, the lower part of the rising frame part 14 a. The other end of the link 104 to be connected is connected via a shaft 105, and the power unit P is swingably supported on the vehicle body frame F while being able to swing up and down, and the rear wheel WR is supported by the power unit P. It is pivotally supported at the rear. A rear cushion unit 17 is provided between the rear part of the seat rail part 14b of the left rear frame 14 and the rear part of the power unit P among the pair of left and right rear frames 14.

  A storage box 18 is supported between the front portions of the rear frames 14 in the body frame F, and a tandem-type riding seat 19 that covers the storage box 18 from above can be opened and closed. Supported by Further, a fuel tank 20 supported by the rear frames 14 is disposed behind the storage box 18 so as to be covered with the riding seat 19.

  The vehicle body frame F, a part of the power unit P, the storage box 18 and the fuel tank 20 are covered with a vehicle body cover 21, and a leg shield that covers a leg portion of an occupant sitting on the riding seat 19 from the front. 22, a step floor 23 that is connected to the lower part of the leg shield 22 so that an occupant sitting on the riding seat 19 places his / her foot on the front side of the power unit P, and both sides of the step floor 23. A part of the vehicle body cover 21 is composed of an under cowl 25 that has a pair of left and right skirt portions 24... Hanging downward from the side and covers the lower frame portion 12 b of the main frame 12 from the side and from below.

  In FIG. 2, the power unit P includes a single-cylinder water-cooled engine E disposed on the front side of the rear wheel WR, and a transmission device M interposed between the engine E and the rear wheel WR. Composed.

  The engine body 29 of the engine E includes a crankcase 30 formed by combining left and right crankcase halves 30L and 30R divided into left and right, a cylinder block 31 coupled to the crankcase 30, and the cylinder block 31. A cylinder head 32 coupled to the cylinder head 32 and a head cover 33 coupled to the cylinder head 32. The piston 35 slides on a cylinder bore 34 provided in the cylinder block 31 with a cylinder axis slightly inclined upward. Can be fitted. A crankshaft 36 extending in the width direction of the vehicle body frame F is rotatably supported on the crankcase 30, and the piston 35 is connected to the crankshaft 36.

  A combustion chamber 37 facing the top of the piston 35 is formed between the cylinder block 31 and the cylinder head 32, and an intake valve (not shown) for controlling intake air to the combustion chamber 37 and the combustion chamber 37. A valve operating device 38 that opens and closes an exhaust valve (not shown) that controls exhaust of the cylinder is housed between the cylinder head 32 and the head cover 33, and a camshaft 39 provided in the valve operating device 38 includes the crankshaft. The cylinder head 32 is supported so as to be able to rotate about an axis parallel to 36.

  Between the crankshaft 36 and the camshaft 39, a timing transmission device 42 including a cam chain 41 that runs in a cam chain chamber 40 formed in the engine body 29 from the crankcase 30 to the cylinder head 32 is provided. The timing transmission mechanism 42 transmits the power from the crankshaft 36 to the camshaft 39 at a reduction ratio of 1/2.

  The transmission device M includes a belt-type continuously variable transmission 43 and a gear reduction mechanism 44 that decelerates the output of the continuously variable transmission 43 and transmits it to the axle 45 of the rear wheel WR. 43 and the gear reduction mechanism 44 are housed in a transmission case 46 that is connected to the crankcase 30 and extends to the left side of the rear wheel WR.

  The transmission case 46 is connected to the left crankcase half 30L of the crankcase 30 so as to be integrated with the case main body 47 extending rearward to the left side of the rear wheel WR, and a transmission chamber for housing the belt type continuously variable transmission 43. 50 is formed between the case main body 47 and an outer cover 48 that is coupled to the case main body 47 from the outside, and a gear chamber 51 that houses the gear reduction mechanism 44 is disposed between the rear portion of the case main body 47. The inner cover 49 is formed and joined to the rear portion of the case main body 47 from the inside.

  The belt-type continuously variable transmission 43 is provided between the left end portion of the crankshaft 36 that enters the transmission chamber 50 and the transmission shaft 52 that is linked to and connected to the axle 45 of the rear wheel WR. A drive pulley 53 provided on the crankshaft 36 with a belt winding diameter being variable, a driven pulley 54 provided on the transmission shaft 52, a drive pulley 53, and a driven pulley 54, which are accommodated in the transmission chamber 50. And an endless V-belt 55 wound around the belt.

  The drive pulley 53 is disposed on the crankcase 30 side of the fixed pulley half 56 so as to be able to approach and separate from the fixed pulley half 56 fixed to the crankshaft 36 and the fixed pulley half 56. And a movable pulley half 57.

  A ramp plate 58 facing the movable pulley half 57 from the opposite side to the fixed pulley half 56 is fixed to the crankshaft 36, and a plurality of spaces are provided between the ramp plate 58 and the movable pulley half 57. The weight rollers 59 are arranged. Thus, the movable pulley half 57 approaches the fixed pulley half 56 by the centrifugal force acting on the weight rollers 59 as the rotational speed of the ramp plate 58 rotating together with the crankshaft 36 increases. And the belt winding radius of the drive pulley 53 is increased.

  A kick shaft 61 is rotatably supported on the outer cover 48 of the transmission case 46, and a kick pedal 62 is provided at the outer end of the kick shaft 61. Further, a kick type starting device that can transmit the rotational power of the kick shaft 61 according to the depression operation of the kick pedal 62 to the crank shaft 36 between the kick shaft 61 and the crank shaft 36 on the inner surface side of the outer cover 48. 63 is provided. A plurality of fins 64 for causing the fixed pulley half 56 to function as a cooling fan for circulating cooling air into the transmission case 46 protrude from the outer surface of the fixed pulley half 56 in the drive pulley 53. Established.

  The driven pulley 54 surrounds the transmission shaft 52 coaxially, and is fixed to a cylindrical inner cylinder 66 that is rotatably supported on the transmission shaft 52, and a shaft with respect to the inner cylinder 66. The movable pulley half 69 is configured to be movable toward and away from the fixed pulley half 68 by being fixed to an outer cylinder 67 that coaxially surrounds the inner cylinder 66 so that relative movement and relative rotation are possible. Then, the V-belt 55 is wound between the fixed pulley half 68 and the movable pulley half 69. A torque cam mechanism 70 that applies a component force in the axial direction between the two pulley halves 68 and 69 in accordance with the relative rotational phase difference between the movable pulley half 69 and the fixed pulley half 68 includes the inner cylinder 66 and the outer pulley 66. Provided between the cylinders 67, the movable pulley half 69 is elastically biased toward the fixed pulley half 68 by the coil spring 71, and the engine speed is set between the fixed pulley half 68 and the transmission shaft 52. A centrifugal clutch 72 is provided that enters a power transmission state as the rotational speed is exceeded.

  Thus, the axial distance between the fixed pulley half 68 and the movable pulley half 69 in the driven pulley 54 is the axial force generated by the torque cam mechanism 70, the axial elastic force generated by the coil spring 71, and the fixed It is determined by the balance with the force from the V-belt 55 acting in the direction of separating the pulley half 68 and the movable pulley half 69, and the movable pulley half 57 is brought close to the fixed pulley half 56 in the drive pulley 53. Thus, when the winding radius of the V belt 55 around the drive pulley 53 is increased, the winding radius of the V belt 55 around the driven pulley 54 is decreased.

  One end of the axle 45 of the rear wheel WR penetrates the inner cover 49 in an airtight manner and enters the gear chamber 51, and one end of the axle 45 is rotatably supported by the case main body 47 and the inner cover 49. A gear reduction mechanism 44 is provided between the transmission shaft 52 and the axle 45. A swing arm 73 connected to the crankcase 30 of the engine body 29 is disposed on the right side of the rear wheel WR, and the other end portion of the axle 45 is rotatably supported on the rear portion of the swing arm 73.

The gear reduction mechanism 44 includes a drive gear 74 provided integrally with a transmission shaft 52 to which rotational power from the crankshaft 36 is transmitted, a driven gear 75 provided on the axle 45 of the rear wheel WR, and the driven gear. 75 and first and second intermediate gears 76, 76 disposed between the drive gear 74 and an intermediate gear shaft 108 whose both ends are rotatably supported by the case main body 47 and the inner cover 49. First and second intermediate gears 76 and 76 are fixed.

  An outer rotor 77 is fixed to the right end of the crankshaft 36 that rotatably passes through the right crankcase half 30R in the crankcase 30 and constitutes a generator 79 together with the outer rotor 77. The inner stator 78 surrounded by is fixed to a support plate 80 fastened to the right crankcase half 30R.

  A cover member 82 having a cooling air inlet 83 that opens outward is disposed on one side of the crankcase 30 in the vehicle width direction, in this embodiment on the right side in the vehicle width direction. Is supported by the right case half 30 </ b> R of the crankcase 30 via a cylindrical shroud 81 surrounding the generator 79. A cooling fan 84 that sucks cooling air from the cooling air introduction port 83 toward the crankcase 30 is linked and connected to the crankshaft 36 so as to be covered by the cover member 83. That is, the cooling fan 84 is fixed to the right end portion of the crankshaft 36 so as to be located inward of the cover member 82 in the vehicle width direction.

  A radiator 85 is disposed between the cooling fan 84 and the cover member 82 so as to be covered with the cover member 82, and the radiator 85 is supported by the shroud 81.

  On the other hand, on the camshaft 39 provided in the valve gear 38 accommodated between the cylinder head 32 and the head cover 33, the pump shaft 87 of the cooling water pump 86 attached to the right side surface of the cylinder head 32 is coaxial and cannot be relatively rotated. The cooling water pump 86 is connected to the radiator 85 via a thermostat 88.

3 to 5 together, the cover member 82 is one side in the vehicle width direction of the pair of left and right skirt portions 24 constituting a part of the vehicle body cover 21 (the vehicle width in this embodiment). is supported through the shroud 81 in the right case half 30R of the crankcase 30 so as to partially disposed even without least the rear of the skirt portion 24 of the right direction), in Figures 3 and 5 As shown in the figure, all of the cooling air inlets 83 are arranged behind the right skirt portion 24 so that the cover member 82 is located in the vehicle width direction outer end 24a of the right skirt portion 24. It is arranged in the vehicle width direction in a plan view. In addition, a cap cover portion 82a that covers a filler cap 107 that is detachably attached to a filler neck (not shown) of the radiator 85 from the outside is provided on the upper portion of the cover member 82.

  Moreover, at least the rear portion of the right skirt portion 24 is formed with a cooling air guide recess 90 that guides the cooling air toward the cover member 82 so as to be recessed inward in the vehicle width direction. A lower extension 24b that extends downward from the lower end of the cover member 82 in a side view is integrally formed. Thus, the lower end portion of the downward extending portion 24 b is fastened by the screw member 96 to the stay 95 fixed to the rising frame portion 14 a of the right rear frame 14 in the vehicle body frame F.

  An air guide protrusion 91 is provided on the outer surface of the cover member 82 so as to protrude outward in the vehicle width direction, and the air guide protrusion 91 is formed at the upper edge of the cooling air guide recess 90. It has at least an upper front-rear direction extending protrusion 92 extending in the front-rear direction in the direction extending rearward of the portion 90 a, and is formed so as to guide the cooling air from the cooling air guide recess 90 to the cooling air inlet 83. The In addition, the upper front-rear direction extending protrusion 92 is formed so as to be inclined rearwardly corresponding to the cooling wind guide recess 90 inclined rearwardly.

The air guide protrusion 91 extends downward from the rear end of the upper front / rear extending protrusion 92 behind the cooling air introduction port 83 and the upper front / rear extending protrusion 92 and the cover member 82. A vertically extending protrusion 93 projecting from the outer surface of the cover member 82, and projecting from the outer surface of the cover member 82 so as to extend back and forth below the cooling air inlet 83, and a rear end portion extending in the vertical direction The lower front-rear extending protrusion 94 connected to the lower end of the protrusion 93 is formed in a substantially U shape that opens forward, and the front end 92a of the upper front-rear extending protrusion 92 is It is arranged closer to the rear end of the skirt portion 24 on the right side than the front end 94 a of the lower front-rear extending projection 94 .

  As clearly shown in FIG. 5, the upper front-rear direction extending protrusion 92 is formed such that the amount of protrusion from the outer surface of the cover member 82 increases toward the rear, and the up-down direction extending protrusion 93 is formed. Is inclined so as to be in a forward position toward the projecting end from the outer surface of the cover member 82.

Further, as clearly shown in FIG. 5, the front end 92 a of the front-rear extension protrusion 92 is disposed inward in the vehicle width direction with respect to the cooling air guide recess 90, and the front-rear extension protrusion 92. The outer end in the vehicle width direction is disposed more outward in the vehicle width direction than the cooling air guide recess 90. Further, as clearly shown in FIG. 3, the front end 92 a of the longitudinally extending projection 92 is disposed below the upper edge portion 90 a of the cooling air guide recess 90, and the cooling air inlet 83 The substantially entire upper, lower, and rear sides are surrounded by the air guide protrusion 91.

  As shown in FIG. 3, a foldable pillion step 98 is supported on a support stay 97 fixed to the rising frame portion 14a of the right rear frame 14 of the vehicle body frame F. The cover member 82 is disposed so as to overlap the cover member 82 from the outside above the longitudinally extending projection 92.

  In addition, the cover member 82 has a second cooling air introduction port 106 disposed above the upper front-rear direction extending projection 92 in at least a part (a part in this embodiment) in a side view. The pillion step 98 is provided so as to overlap from the outside.

The cover member 82 includes a plurality of vertically extending blades 99 a... And a shielding wall 99 b projecting rearward from the front portion of the cooling air introduction port 83 and is disposed in the cooling air introduction port 83. A louver 99 is provided so as to approach the radiator 85 toward the front.

Next, the operation of this embodiment will be described. The cover member 82 having the cooling air inlet 83 that opens toward the outer side is the vehicle of the pair of left and right skirt portions 24. so as to place the part even without least behind the right side in the width direction of the skirt portion 24 is supported by the crankcase 30 of the engine E, the whole is arranged so as to face the outside at the rear than the rear end of the skirt portion 24 a cooling fan 84 for sucking the cooling air from the cooling air inlet 83 into the crankcase 30 side to be found linked to the crankshaft 36 so as to be covered by the cover member 82, but it is being connected, the right of the skirt At least the rear portion of the portion 24 is formed with a cooling air guide recess 90 that guides the cooling air toward the cover member 82 so as to be recessed inward in the vehicle width direction. A wind guide protrusion 91 provided on the outer surface of the cooling wind guide portion 91 so as to protrude outward in the vehicle width direction is an upper side extending in the front-rear direction in the direction extending rearward of the upper edge portion 90a of the cooling air guide recess 90. It has at least a longitudinally extending projection 92 and is formed so as to guide the cooling air from the cooling air guide recess 90 to the cooling air inlet 83.

Therefore, it is possible to efficiently guide the cooling air to the cooling air inlet 83 of the cover member 82 with a simple configuration in which the cooling air from the cooling air guide recess 90 is guided to the cooling air inlet 83 by the air guide protrusion 91. can also that the entire of the cooling air inlet 83 is positioned behind the rear end of the skirt portion, it is not necessary to Ru provided with a cooling air guide hole on the vehicle body cover 21, a body cover 21 easily A reduction in rigidity of the vehicle body cover 21 can be avoided while enabling molding. Moreover, since the upper front-rear direction extending protrusion 92 extends in the front-rear direction in the rearward extension direction of the upper edge portion 90a of the cooling air guide recess 90, the cooling air from the cooling air guide recess 90 is more effective. In addition, it can be received by the upper front-rear extending projection 92, and the skirt portion 24 and the cover member 82 have a design surface that gives a continuous impression in the front-rear direction, creating a sporty appearance and product appeal. Can be increased.

Also, since all of the cooling air inlet 83 is arranged so as to face the outside without being covered by the skirt portion 24, it is possible to hot air from the engine E side hardly cooling air inlet 83 suction.

  In addition, the upper front-rear direction extending projection 92 is also formed to be inclined rearward corresponding to the cooling air guide recess 90 inclined rearwardly, so that the cooling air introduction port uses the traveling airflow from the front as the cooling air. 83 can be efficiently guided.

  In addition, a lower extending portion 24b extending downward from the lower end of the cover member 82 in a side view is integrally formed at the rear portion of the right skirt portion 24, so that the front skirt portion is formed on the entire cover member 82. The cooling air can be guided from 24.

  Further, the air guide protrusion 91 extends downward from the rear end of the upper front-rear extending protrusion 92 behind the cooling air introduction port 83 and protrudes from the outer surface of the cover member 82. Therefore, the cooling air that flows backward from the front skirt portion 24 of the cover member 82 is received by the vertically extending protrusion 93, so that the cooling air can be more efficiently guided to the cooling air inlet 83.

In addition, the air guide protrusion 91 protrudes from the outer surface of the cover member 82 so as to extend back and forth below the upper front-rear extension protrusion 92 and the vertical extension protrusion 93 and the cooling air inlet 83. Since the rear end portion is formed in a substantially U-shape that is opened forward by a lower front-rear direction extending protrusion 94 that is connected to the lower end portion of the vertically extending protrusion 93 , the wind guide of the cover member 82 It is possible to give an impression that the continuity between the protrusion 91 and the cooling air guide recess 90 of the skirt portion 24 is enhanced, and the upper end extends in the front-rear direction at the rear end of the skirt portion 24 in front of the cover member 82. Since the front end 92a of the protrusion 92 is disposed closer to the front end 94a of the lower front-rear extending protrusion 94, it is easy to guide the traveling air flowing from the lower part of the skirt portion 24 to the cooling air inlet 83. , More efficiently guide the cooling air to the cooling air inlet 83 It can be.

  Further, since the folding pillion step 98 is arranged so as to overlap the cover member 82 from the outside above the upper front-rear extending protrusion 92 in a side view, the upper pillion step 98 extends in the upper front-rear direction. The projecting portion 92 is not hidden and the design can be ensured, and the pillion step 98 does not obstruct the intake of the traveling wind into the cooling air inlet 83.

  In addition, since the second cooling air introduction port 106 disposed above the upper front-rear direction extending protrusion 92 is provided in the cover member 82, the area where the cooling air can be introduced in the cover member 82 can be expanded, In addition, since the pillion step 98 overlaps at least a part of the second cooling air introduction port 106 from the outside in a side view, it is not necessary to provide a special protection member, and the second cooling air introduction port 106 is installed in the pillion step 98. It can be effectively protected.

  Further, since the cover member 82 is disposed inward in the vehicle width direction in plan view with respect to the vehicle width direction outer end 24a of the right skirt portion 24, the cover member 82 is covered in consideration of the introduction of running air to the cooling air inlet 83. Compared to the case where the member 82 is disposed outward from the outer end of the front skirt portion 24, the cooling air is introduced into the cooling air inlet 83 of the cover member 82 while reducing the width of the power unit P along the vehicle width direction. Can be imported.

  Further, since the upper front-rear extending protrusion 92 is formed so that the amount of protrusion from the outer surface of the cover member 82 increases toward the rear, it becomes easier to guide the cooling air to the cooling air inlet 83, Since the vertically extending protrusion 93 is formed so as to be inclined forwardly toward the protruding end from the outer surface of the cover member 82, the cooling air can be more effectively improved by the vertically extending protrusion 93. Thus, the cooling air can be more effectively guided to the cooling air inlet 83.

  Further, since the radiator 85 is disposed between the cooling fan 84 and the cover member 82 so as to be covered with the cover member 82, the radiator 85 can be effectively cooled by the cooling air, and the water-cooled engine E is provided. Is preferred.

Further, the louver 99 having the shielding wall 99b projecting rearward from the front portion of the cooling air introduction port 83 and being disposed in the cooling air introduction port 83 approaches the radiator 85 as it goes forward, so as to cover the cover member 82. Therefore, the radiator 85 can be protected. In particular, the shielding wall 99b provided at the front portion of the cover member 82 adjacent to the radiator 85 allows water having a high water pressure to directly hit the radiator 85 during washing. Therefore, the radiator 85 can be effectively protected.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the case where the engine E is a water-cooled type has been described. However, the present invention can also be applied to a scooter type motorcycle in which the engine is an air-cooled type.

21 ... Body cover 23 ... Step floor 24 ... Skirt portion 24b ... Downward extension portion 82 ... Cover member 83 ... Cooling air inlet 84 ... Cooling fan 90 ... Cooling air guide recess 90a ... Upper edge portion 91 of cooling air guide recess ... Air guide protrusion 92 ... Front and rear direction extending protrusion (upper front and rear direction extending protrusion)
92a: front end of the front-rear extending protrusion ( front end of the upper front-rear extending protrusion)
93 ... Vertically extending protrusion 94 ... Lower front and rear direction extending protrusion 94a ... Front end 98 of the lower front and rear direction extending protrusion ... Pillion step 99 ... Louver 99b ...・ Shielding wall P ... Power unit

Claims (15)

An engine (E), and a transmission (M) for transmitting rotational power from a crankshaft (36) rotatably supported by a crankcase (30) of the engine (E) to a rear wheel (WR). A cover member (82) having a cooling air introduction port (83) that is supported on the vehicle body frame (F) so as to be swingable and opens outwardly is a vehicle width of the crankcase (30). A cooling fan (84) supported by the crankcase (30) so as to be arranged on one side in the direction and sucking cooling air from the cooling air inlet (83) to the crankcase (30) side, A step floor (23) that is interlocked and connected to the crankshaft (36) so as to be covered with a cover member (82) and disposed in front of the power unit (P), and the step flow A scooter type motorcycle in which a part of a vehicle body cover (21) that covers the vehicle body frame (F) is composed of a pair of left and right skirt portions (24) that are provided on both left and right sides of (23) and hang downward. In
At least a portion of said cover member (82), the rear than the rear end of the skirt portion of the vehicle width direction on one side of the two skirt portions all cooling air inlet (83) (24) (24) The cooling air guide air is arranged behind the skirt portion (24) so as to face the outside and guides the cooling air to at least the rear portion of the skirt portion (24) toward the cover member (82). The recess (90) is formed so as to be recessed inward in the vehicle width direction,
An air guide protrusion (91) provided on the outer surface of the cover member (82) so as to protrude outward in the vehicle width direction is behind the upper edge (90a) of the cooling air guide recess (90). At least a longitudinally extending protrusion (92) extending in the front-rear direction and extending from the cooling air guide recess (90) to the cooling air inlet (83). Scooter type motorcycle characterized by that. Scooter of claim 1 Symbol mounting, characterized in that it is in correspondence with the cooling air baffle recess which is inclined rearwardly upwards (90) the longitudinal direction extending projection (92) is also inclined rearwardly upwards is formed Type motorcycle. The rear portion of the skirt portion of the front Symbol vehicle width direction on one side (24), downward extending portion which extends downward from the lower end of the cover member in a side view (82) (24b) are formed integrally The scooter type motorcycle according to claim 1 or 2 . Before Kishirubefu projection (91) is outside of said cover member from the rear end extends below the even behind the cooling air inlet (83) longitudinal direction extending projection (92) (82) The scooter type motorcycle according to any one of claims 1 to 3 , further comprising a vertically extending protrusion (93) protruding from the surface. Before Kishirubefu protrusion (91) comprises a longitudinal direction extending projection (92) and said vertically extending projections (93), so as to extend back and forth below the cooling air inlet (83) And projecting from the outer surface of the cover member (82) and having a rear end extending in the lower front-rear direction extending projection (94) connected to the lower end of the vertical extending projection ( 93 ). The front end (92a) of the longitudinally extending projection (92) is wider than the front end (94a) of the lower longitudinally extending projection (94). The scooter type motorcycle according to claim 4 , wherein the scooter type motorcycle is arranged close to a rear end of the skirt portion (24) on one side in the direction. In fold folded formula pillion step (98) has a feature in that in side view, it is arranged to overlap from the outer side to the cover member in the upper (82) than the longitudinal direction extending projection (92) The scooter type motorcycle according to any one of claims 1 to 5 . Before SL cover member (82), the second cooling air inlet (106), at least in part on the in side view pillion step disposed above said longitudinal direction extending projection (92) ( 98. The scooter type motorcycle according to claim 6, wherein 98) is provided so as to overlap from the outside. Before SL cover member (82), characterized in that it is arranged in the vehicle width direction inner side in a plan view than the vehicle width direction outer end (24a) of the skirt portion of the vehicle width direction on one side (24) The scooter type motorcycle according to any one of claims 1 to 7 . Upper edge of the front Symbol cooling air baffle recess (90) the longitudinal direction extending projections extending in the longitudinal direction in the extending direction of the rearward (90a) (92) is, the cover member toward the rear (82) The scooter type motorcycle according to any one of claims 1 to 8 , wherein the scooter type motorcycle is formed so that a protruding amount from the outer surface of the scooter increases. Before SL vertically extending projection (93) is, according to claim 4, characterized in that it is formed to be inclined such that the forward position as the toward the protruding end from the outer surface of said cover member (82) or 5. The scooter type motorcycle according to 5 . Before SL cooling fan (84) and said cover member (82) between any of claims 1-10 for the radiator so as to be covered by the cover member (82) (85) is being arranged Scooter type motorcycle described in 1. A louver (99) having a shielding wall (99b) projecting rearward from the front portion of the cooling air introduction port (83) in a side view and arranged in the cooling air introduction port (83) is seen in a plan view. The scooter type motorcycle according to claim 11 , wherein the scooter type motorcycle is provided on the cover member (82) so as to approach the radiator (85) toward the front. The front end (92a) of the longitudinally extending projection (92) is disposed inward in the vehicle width direction with respect to the cooling air guide recess (90) in plan view. The scooter type motorcycle according to any one of 12 above. The vehicle width direction outer end of the longitudinally extending protrusion (92) is arranged outward in the vehicle width direction from the cooling air guide recess (90) in plan view. The scooter type motorcycle according to any one of -13. A front end (92a) of the longitudinally extending projection (92) is disposed below the upper edge (90a) of the cooling air guide recess (90) in a side view, and the cooling air inlet (83) The scooter type motorcycle according to any one of claims 1 to 14, characterized in that substantially the entire upper, lower, and rear sides of the vehicle are surrounded by the wind guide protrusion (91).

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