JP5283734B2 - Scooter type vehicle - Google Patents

Description

  The present invention relates to a scooter type vehicle.

The scooter type vehicle according to the present invention includes a front wheel, a rear wheel, a frame, a handle supported by the frame, a seat provided behind the handle, and the handle and the seat with respect to the front-rear direction. A water-cooled engine disposed between and having a footrest having a footrest surface, a water cooling engine disposed so as to cross a plane including the rotation shaft of the front wheel and the rotation shaft of the rear wheel, and the frame so as to cross the plane A radiator fixed to the radiator, a body cover partly disposed on both sides of the radiator, and a fan disposed behind the radiator, the frame supporting a head pipe that supports the handle When the has a frame upper extending rearward from a head pipe, a pair of right and left lower frames extending rearward from the head pipe, the lower The lem has a first portion extending rearward and downward from the head pipe in a side view and a second portion extending rearward from the first portion. In the side view, the radiator includes the lower portion. The frame is disposed in front of the first portion and above the second portion, and a part of the fan overlaps the lower frame in a side view.

  Embodiments of the present invention will be described below.

  1 to 11 show an embodiment of the present invention. In the embodiment of the present invention, an entire scooter type vehicle that is a motorcycle including an invention portion will be described.

  First, the configuration will be described. The scooter type vehicle according to this embodiment has a low-floor main footrest 3 between the handle 1 and the seat 2 as shown in FIGS. An engine 4 is fixed to a vehicle body frame 5 (hereinafter referred to as “frame 5”) in the vicinity of the main footrest 3, and a rear arm 8 swings up and down via a pivot shaft 7 at the rear end of the engine 4. The rear wheel 10 is supported at the rear end of the rear arm 8.

  Specifically, a rear cushion 48 is interposed between the engine 4 and the rear arm 8, and the engine 4 has a cylinder portion 4a protruding substantially horizontally from the crankcase 4h toward the front of the vehicle body as will be described later. It is a 4-cycle parallel 2-cylinder engine. As shown in FIGS. 2 and 4, the frame 5 as a skeleton is provided with a cylindrical head pipe 5a at the front end, and an upper frame 5b and a lower frame 5c extend rearward from the head pipe 5a. Has been.

  The upper frame 5b has a central pipe 5d connected to the rear side of the head pipe 5a and extended rearward, and a pair of front pipes 5e branched right and left from the rear end of the central pipe 5d and extended rearward. Has been. The rear pipe 5f having a diameter smaller than that of the front pipe 5e is rearward and obliquely upward via a box-shaped portion 5j formed by joining two sheet metals to the rear ends of the pair of front pipes 5e. It is extended towards. Further, a cross pipe 5g extending in the vehicle width direction is installed on the pair of rear pipes 5f, and a box shape in which the front end portion of the back stay 5h is formed on the pipe 5f in the same manner as the box-shaped portion 5j is a bracket. The rear end of the back stay 5h is directly fixed to the rear side of the rear pipe 5f.

  The lower frame 5c is provided in a pair of left and right. Reference numeral 5Y denotes a reinforcing frame that connects the central pipe 5d and the pair of lower frames 5c.

  The steering shaft 11 of the handle 1 is inserted into the head pipe 5a of the frame 5 and is rotatably supported. The upper end portion 11a of the steering shaft 11 protruding from the head pipe 5a is connected to the left and right front fork pipes 14 and 14 via the crown handle 13, and the head pipe 5a of the steering shaft 11 A lower end 11b protruding from the left and right front fork pipes 14 and 14 is connected via an under bracket 16 (see FIG. 5).

  The crown handle 13 is bent so that the steering shaft connecting portion 13a at the center is high and the front fork pipe connecting portions 13b at both ends are lowered, and the handle holder portion protrudes upward to the steering shaft connecting portion 13a. 13c is integrally formed and is die-cast with an aluminum material (Al).

  The upper side of the front fork pipe connecting portion 13b is covered with the upper surface portion 17a of the leg shield 17 which is a vehicle body cover, and the handle holder portion 13c formed on the steering shaft connecting portion 13a is formed on the leg shield upper surface portion 17a. It faces upward from the formed through hole 17b.

  Further, the handle 1 is fixed on the upper side of the steering shaft connecting portion 13a by the handle holder portion 13c and the cap holder 87, and the handle 1 is covered with the handle cover 19, and the handle cover 19 Nineteen cylindrical lower portions 19 a are rotatably inserted into the through holes 17 b of the leg shield 17.

  The leg shield 17 covers the periphery of the head pipe 5a, the front fork pipe 14, and the like.

  The front fork pipe 14 is telescopic, and the upper inner tube 14a is inserted into the lower outer tube 14b so as to be slidable in the axial direction, and the inner tube 14a is biased upward by a spring (not shown). The front wheel 20 is supported at the lower end of the outer tube 14b.

  As described above, the crown handle 13 is bent so that the steering shaft connecting portion 13a at the center is high and the front fork pipe connecting portions 13b at both ends are low, so that the height of the steering shaft connecting portion 13a is increased. If the front fork pipe connecting portion 13b side is lowered accordingly, the position of the upper surface portion 17a of the leg shield 17 covering the upper side of the front fork pipe connecting portion 13b can be lowered. 17 can be miniaturized.

  Further, the upper surface portion 17a of the leg shield 17 covers the upper side of the crown handle 13, and only the steering shaft connecting portion 13a of the crown handle 13 is raised so as to face the through hole 17b of the leg shield 17. Therefore, the through hole 17b can be small, and the handle cover 19 that closes the through hole 17b can be downsized.

  Further, since the steering handle connecting portion 13a at the center of the crown handle 13 is high and the vertical dimension H1 of the head pipe 5a can be secured, the support rigidity of the steering shaft 11 by the head pipe 5a can be increased, and the traveling performance is improved. be able to.

  In addition, if the telescopic front fork pipe 14 is used which extends to the upper edge of the head pipe 5a and is connected to the left and right sides of the head pipe 5a as in this embodiment, the steering shaft 11 is used. This can be applied to a vehicle with a large displacement in combination with the improvement of the support rigidity.

  In this embodiment, it is needless to say that a bottom link type telescopic front fork can be applied.

  On the other hand, as shown in FIG. 2, the upper part of the engine 4 has its crankcase 4h fixed to the box-shaped part 5j between the front pipe 5e and the rear pipe 5f, and to both ends of the cross pipe 5g of the rear pipe 5f. The bracket 5k and the box-like bracket 5i at the lower end of the back stay 5h are fixed with bolts 22, 23, 24 having lengths straddling the front and rear pipes 5e, 5f, respectively. The rear end portions of the pair of lower frames 5c are flattened and flat plate brackets 5m are fixed to the rear end portions, and the front lower portion of the crankcase 4h of the engine 4 is bolted to the bracket 5m. 25 stops.

  A fuel tank 27 supported by the frame 5 is disposed on the upper side of the engine 4, and a luggage storage box 29 is disposed on the rear side of the fuel tank 27, and the seat 2 is centered on a hinge 32 at the front end above these. It is provided rotatably.

  By attaching the engine 4 to the frame 5 as described above, the engine 4 functions as a frame member. Therefore, the frame pipe can be abolished, so that the vehicle body can be reduced in size and weight can be reduced. be able to. Moreover, since the lower frame 5c can be shortened and the heavy engine 4 can be set at a low position, the center of gravity of the vehicle can be lowered.

  Furthermore, the connection part of the engine 4 can be easily formed by utilizing the box-shaped part 5j and the box-shaped bracket 5i.

  In addition, the large load transmitted from the wheels 10 and 20 combined with the rear cushion 48 interposed between the engine 4 and the rear arm 8 causes the rear arm 8, the engine 4, and the frame 5 on the front side of the engine 4. Since a large load is not transmitted to the rear pipe 5f side, the rear pipe 5f side can be reduced in diameter, and accordingly, the fuel tank 27 and the storage box 29 are made larger. Can be

  In this embodiment, the rear pipe 5f, the back stay 5h, and the like are provided behind the engine 4 in place of the upper frame 5b. Instead, as shown in FIG. By fixing the box 30 to the engine 4 with bolts 23 and 24, the pipe 5f, the backstay 5h, etc. can be abolished thereafter. This eliminates the need for the frame at the rear of the vehicle body, and further increases the size of the storage box 30.

  On the other hand, as shown in FIGS. 2 and 6, an air cleaner 34 is fixed to the head pipe 5 a in front of the head pipe 5 a of the frame 5, and the air cleaner 34 and the engine 4 are connected to the intake duct 35. It is connected through.

  Specifically, the air cleaner 34 is fixed to the head pipe 5a, and is configured in a position and shape so as not to interfere even when the front fork pipe 14 rotates as shown by a two-dot chain line in FIG. The intake duct 35 includes a first intake duct 35a and a second intake duct 35b provided in a pair, and an intake chamber 37 is interposed between the first intake duct 35a and the second intake duct 35b. The first intake duct 35a extends rearward from the air cleaner 34, and is inserted between the head pipe 5a and the front fork pipe 14 as shown in FIGS. 2 and 6, and has a predetermined volume. It is connected to the chamber 37. The intake chamber 37 is fixed to the frame 5, and the second intake duct 35 b is further extended from the intake chamber 37 to be connected to a pair of carburetors 38. The carburetor 38 is connected to the engine 4.

  Reference numeral 34 a denotes an air inlet of the air cleaner 34, and reference numeral 34 b denotes a cylindrical element disposed in the air cleaner 34. The outside air sucked from the suction port 34a passes through the cylindrical element 34b and then branches and flows in the pair of first intake ducts 35a. The air then merges in the intake chamber 37 and branches again to split the pair of second intake air. It introduce | transduces into each vaporizer 38 from the duct 35b.

  As described above, in the case where the engine 4 in which the cylinder portion 4a is protruded substantially horizontally toward the front is disposed in the vicinity of the main footrest 3 below the front of the seat 2, a relatively large volume is required in the vicinity thereof. When the air cleaner 34 is to be disposed, the footrest space S1 and the foot passage space S2 are narrowed. On the other hand, the foot cleaner space S1 and the foot passage space S2 are increased by disposing the air cleaner 34 on the front side of the head pipe 5a. It can be secured.

  Further, by arranging the air cleaner 34 on the front side of the head pipe 5a and connecting the air cleaner 34 to the rear engine 4 with a relatively small intake duct 35, interference between the intake system and the steering system can be avoided. .

  Further, by disposing the air cleaner 34 on the front side of the head pipe 5a, the capacity of the air cleaner 34 can be increased as compared with the case where it is disposed in the vicinity of the main footrest 3, and the air cleaner 34 is directly connected to the air cleaner 34 without a duct. Outside air can be introduced and ram air can be used.

  Since the position of the air cleaner 34 is a relatively high position, clean outside air can be introduced without being splashed with dust, muddy water, or the like splashed by the front wheel 20.

  Further, by providing an intake chamber 37 having a predetermined volume in the intake duct 35, intake pulsation on the engine 4 side can be suppressed and engine performance can be improved.

  In the above embodiment, the intake duct 35 is inserted between the head pipe 5a and the front fork pipe 14. However, as shown by the two-dot chain line in FIG. It is also possible to connect the engine 4 by inserting between the front fork pipes 14.

  The engine 4 is water-cooled, and main footrests 3 are provided on the left and right sides of the engine 4. A center cover 40 protrudes upward between the main footrests 3 and extends in a tunnel shape in the front-rear direction. Is provided. A radiator 42 is disposed between the front wheel 20 and the engine 4 below the footrest surface of the main footrest 3. The radiator 42 has a flat rectangular parallelepiped shape, and its longitudinal direction is arranged along the vehicle width direction. The radiator 42 is curved so that the central portion is located rearward, and is slightly tilted backward so as to face obliquely upward. The frame 5 is fixed. The radiator 42 has a tank on both sides of the core portion. A fan 43 for guiding outside air to the radiator 42 is disposed behind the radiator 42.

  Further, a cylinder portion 4 a of the engine 4 is disposed in the center cover 40, and the cylinder portion 4 a is located above the radiator 42.

  Furthermore, as shown in FIGS. 1 and 7, the lower part of the leg shield 17 is extended on both sides of the radiator 42, and the lower part of the leg shield 17 as viewed from the front of the vehicle has an inner part at the lower center. A panel 45 is detachably disposed. In order to avoid interference with the front wheel 20, the leg shield 17 has a shape in which both end portions in the vehicle width direction are located in front of the vehicle from the center portion side, and a louver 17c is formed inside the both end portions. The traveling wind is introduced from the louver 17c and blown to the side of the radiator 42 as indicated by the arrow in FIG. The inner panel 45 is detachably provided in the opening 17d of the leg shield 17. The cylinder portion 4a of the engine 4 faces the opening 17d, and a louver 45a is also formed on the inner panel 45. Then, traveling wind or outside air from the fan 43 is introduced from the louver 45a, guided to the radiator by the guide plate 88 fixed to the inner panel 45, and blown to the radiator 42 as indicated by an arrow in FIG.

  The upper edge of the inner panel 45 is smoothly connected to the lower surface inclined rearward and downward of the intake chamber 37.

  In this way, by arranging the radiator 42 below the footrest surface of the main footrest 3, the radiator 42 can be formed wide enough to extend below the left and right main footrests 3. Therefore, the area of the radiator 42 can be increased as compared with those arranged in the center cover 40.

  Further, by arranging the radiator 42 below the footrest surface of the main footrest 3, the engine 4 and the radiator 42 can be brought closer to each other, compared with the radiator 42 that is disposed on the front side of the head pipe 5 a. The piping between the engine 4 and the radiator 42 can be shortened.

  Further, by forming the louvers 45a and 17c on the inner panel 45 and the left and right front surfaces of the leg shield 17, the outside air can be guided from the air guide holes of the louvers 45a and 17c to the radiator 42, thereby improving the cooling performance. I can do it. Further, the intake chamber 37 is disposed below the central pipe 5d immediately after the head pipe 5a, and the lower surface 37a of the intake chamber 37 is used as a part of the air guide plate, and the lower surface 37a is above the inner panel 45. The cooling wind of the radiator 42 and the engine 4 can be further improved by guiding the traveling wind passing through the vehicle downward and introducing it into the inside through the louver 45a of the inner panel 45.

  Furthermore, the cylinder portion 4a of the engine 4 is disposed in the center cover 40 that protrudes upward in the center of the vehicle footrest 3 in the vehicle width direction, and the cylinder portion 4a is positioned above the radiator 42. Therefore, there are the following advantages.

  That is, since the radiator 42 and the engine cylinder part 4a are offset up and down when viewed from the front of the vehicle, the air exchanged with the radiator 42 is not blown onto the engine cylinder part 4a, thereby improving the cooling performance. I can do it.

  Further, by positioning the engine cylinder part 4a above the radiator 42, the length of the vehicle 4 in the front-rear direction occupied by the engine 4 and the entire radiator 42 can be shortened, and the wheel base can be shortened. Can be made close to each other, so that the mass can be concentrated.

  On the other hand, since the inner panel 45 is detachable, the engine 4 can be serviced (for example, plug replacement or the like) through the opening 17d of the leg shield 17 by removing the inner panel 45 together with the guide plate 88. Good and maintainable.

  Further, since the radiator 42 is directed obliquely upward and curved, the bank angle can be increased.

  On the other hand, as shown in FIG. 2, a rear cushion 48 is provided below the engine 4 and between the engine 4 and the rear arm 8. The rear cushion 48 is in a substantially horizontal state, and a front end portion 48a is rotatably attached to the lower portion of the engine 4 by a shaft 49, while a rear end portion 48b is rotatably attached to the rear arm 8 by a shaft 50. . The rear cushion 48 receives a tensile force due to a load from the rear wheel 10.

  Further, as shown in FIG. 8, the rear cushion 48 is disposed in a recess 4d between an oil pan 4b protruding downward from the engine 4 and the dry V-belt transmission 4c when viewed from the rear of the vehicle.

  In this way, the rear arm 8 is attached to the engine 4 via the pivot shaft 7, the front end portion 48 a of the rear cushion 48 is attached to the engine 4, and the rear end portion 48 b is attached to the rear arm 8. The rear cushion 48 can be unitized, and these can be sub-assembled and assembled to the frame 5 side, so that the assembling work can be simplified.

  Further, since the rear cushion 48 is set at a low position, the center of gravity is lowered, and the rear cushion 48 is disposed near the lower side of the engine 4 so that the mass is concentrated.

  In addition, the rear cushion 48 is disposed substantially horizontally along the front-rear direction at the center of the vehicle width direction on the lower side of the engine 4 so that a sufficient bank angle can be secured, and the rear portion of the vehicle body is substantially vertically raised and lowered as in the past. Since it is not disposed along the direction, the space efficiency at the rear of the vehicle body can be improved.

  Further, since the rear cushion 48 is disposed in the recess 4d between the oil pan 4b and the dry V-belt transmission 4c, space efficiency can be improved, ground clearance can be secured, and the bank angle can be increased. It can be taken even larger. By the way, a side stand 52 is attached to the bracket 5m fixed to the lower part of the engine 4 at the rear lower end (substantially center of gravity) of the lower frame 5c so as to be rotatable about a shaft 53. As shown by a two-dot chain line in FIG. 2, the side stand 52 is rotated and stored in a substantially horizontal state along the side surface of the engine 4, so that the side stand 52 projects from the side surface of the engine 4. The equipment (water pump 55 and water pipe 56) can be protected during traveling or falling.

  In addition, by arranging the water pipe 56 in parallel on the side stand 52 in the retracted state, the protection of the pipe 56 is further improved.

  On the other hand, the main stand 58 is disposed behind the center of gravity and on the lower surface of the rear portion of the engine 4, and the main stand 58 is used to support the engine 4 while being removed from the frame 5. The engine 4, the rear arm 8, the rear wheel 10, the rear cushion 48, and the like can be integrally supported by 58, and the assemblability and maintainability of these sub assembly units can be improved.

  On the other hand, as shown in FIG. 9, the engine 4 is a water-cooled four-cycle parallel two-cylinder engine, and a driving force from a piston 4e is applied to a clutch mechanism 4g via a crankshaft 4f and the dry V-belt transmission 4c. The driving force from the clutch mechanism 4g is transmitted to the secondary transmission 60 provided in the rear arm 8 through the gear reduction mechanism. Reference numeral 90 denotes a balancer.

  Then, as shown in FIG. 9, the rear arm 8 is divided into a left divided portion 62 and a right divided portion 63, and mounting boss portions 62a and 63a are extended from and in contact with the divided portions 62 and 63, respectively. As shown in FIG. 2, it is fixed with three points (A, B, C). The rear end portion 48b of the rear cushion 48 is attached so as to be sandwiched between the left side split portion 62 and the right side split portion 63.

  The front end portions 62 b and 63 b of both split portions 62 and 63 are connected to both sides of the pivot shaft 7, and the rear end portions 62 c and 63 c of both split portions 62 and 63 are connected to the rear wheel shaft 65.

  The pivot shaft 7 is divided into left and right parts, and the pivot shaft 7 'on the left side of the vehicle body, that is, the left side split part 62 side is bolted to the crankcase 4h, and the pivot shaft 7 "on the right split part 63 side is provided. Is fixed to the right split portion 63 and is rotatably supported by the crankcase 4h.

  In the secondary transmission 60, the first sprocket 60a is fixed to the output shaft 91, and the first sprocket 60a is connected to the second sprocket 60c via the first silent chain 60b, so that the first stage deceleration is performed. The third sprocket 60d is coaxially rotated with the second sprocket 60c, and the third sprocket 60d disposed inside the second sprocket 60c is connected to the fourth sprocket 60f via the second silent chain 60e. Two-stage deceleration is performed. The left-side split part 62 is configured by combining the right case half 62d and the left case half 62e, and is formed in a liquid-tight structure, in which oil is stored.

  Since the engine 4 is fixed to the vehicle body in this way, and the dry V-belt transmission 4c is disposed in the crankcase 4h of the engine 4 fixed to the vehicle body, the weight on the rear arm 8 side can be reduced. , Unsprung weight can be reduced.

  Further, it is necessary to provide the dry V-belt transmission 4c in the crankcase 4h of the engine 4 and to arrange the secondary transmission device 60 in the rear arm 8 so that power can be transmitted through a long chain exposed to the outside. Therefore, the accuracy can be improved, and by making the secondary transmission 60 wet, the service life can be extended and the frequency of maintenance and inspection can be reduced as compared with the prior art.

  Further, since the third and fourth sprockets 60d and 60f are arranged on the inner side than the first and second sprockets 60a and 60c, the outer shape of the left-side split portion 62 is inwardly directed toward the rear as shown in FIG. Since it can be shifted, the bank angle can be increased.

  On the other hand, a rear wheel shaft 65 is inserted into the fourth sprocket 60f, and a cylindrical portion 60g projects from the fourth sprocket 60f toward the rear wheel 10, and the right side of the cylindrical portion 60g and the left split portion 62 is provided. The case half 62d is sealed with a sealing material 93. Further, as shown mainly in FIG. 10, a clutch damper 67 having a damper 97 interposed in the power transmission path with the rear wheel 10 of the fourth sprocket 60 f is fixed to the rear wheel 10 by a circlip 68. The spline shaft 67a protruding from the clutch damper 67 is inserted into the fourth sprocket cylinder 60g and coupled to the spline 99. A brake caliper 70 into which the rear wheel shaft 65 is inserted is disposed between the rear wheel 10 and the right split portion 63.

  The rear wheel 10 and the clutch damper 67 are integrated by the circlip 68 in a state where the damper 97 is strongly compressed.

  According to this configuration, when the rear wheel shaft 65 is pulled out, the caliper 70 is detached, and a gap (movement allowance C) is generated between the rear wheel 10 and the rear arm right side split portion 63. By moving to the 63 side, the spline 99 coupling between the fourth sprocket 60 f and the clutch damper 67 can be easily removed. As described above, the clutch damper 67 and the rear wheel 10 which require a great amount of labor for coupling can be detached and attached by these units without separating the spline 99 and the rear wheel 10 can be simply detached. It is possible to easily change tires and the like, and since it is not necessary to remove the fourth sprocket 60f and the like on the secondary transmission device 60 side, it is not necessary to attach or detach the chain 60e, and the maintainability can be greatly improved. it can. In particular, since the secondary transmission 60 in the rear arm left-side split portion 62 is wet, it is very beneficial that the secondary transmission 60 does not have to be disassembled.

  Even when the spline 99 is not easily disconnected, the circlip 68 prevents the clutch damper 67 and the rear wheel 10 from being separated.

  By the way, the engine 4 here is a parallel 2-cylinder, and the two exhaust pipes 84 that extend from the cylinder portion 4a to the rear of the vehicle pass through the right side of the rear cushion 48 as shown in FIG. And connected to a muffler 85 disposed on the right side of the rear wheel 10. Needless to say, the two exhaust pipes 84 may converge to one as shown by a two-dot chain line in FIG. 8, and the exhaust pipe 84 is divided into left and right as shown in FIG. You can also connect to. In the embodiment shown in FIG. 11, the main stand 58 and the rear cushion 48 are distributed to the left and right.

  On the other hand, as shown in FIGS. 2 and 4, a fuel tank 27 is disposed above the engine 4 so as to be supported between a pair of rear pipes 5 f, and the storage box 29 is disposed behind the fuel tank 27. The rear pipe 5f and the back stay 5h are supported and arranged.

  The fuel tank 27 is provided with an oil supply port 27a at the top, and by opening the lid portion 2a of the seat 2, fuel can be supplied from the fuel supply port 27a.

  As shown in FIG. 8, a recess 4i is formed on the upper surface of the engine 4 below the fuel tank 27 between the dry V-belt transmission 4c and the clutch mechanism 4g. Wiring 72 such as a brake wire and a wire harness is inserted into the space formed by the fuel tank 27 and the fuel tank 27, and hot air from the engine 4 is released to the rear of the vehicle body by the traveling wind passing through the recess 4i. As a result, the heat dissipation is improved.

  Further, by arranging the heavy fuel tank 27 above the engine 4, mass concentration can be achieved.

  On the other hand, as shown in FIG. 2, the storage box 29 is provided with a full-face helmet storage part 29a in the space above the pivot shaft 7 between the engine 4 and the rear wheel 10, and the helmet storage part 29a includes: As shown in FIG. 4, the helmet 76 for the driver is placed upside down so that the longitudinal direction of the helmet 76 can be stored in the vehicle width direction, and corresponds to the maximum width B portion of the seat 2 in the middle in the front-rear direction. Are arranged. The storage box 29 extends rearward from the helmet storage portion 29a, and a passenger-type jet helmet 77 can be stored in the rear storage portion 29b. Further, during traveling, that is, when the helmets 76 and 77 are not stored, a rectangular bag 78 can be stored as shown by a two-dot chain line in FIGS.

  In addition, the tire house 94 is formed by denting the vehicle width direction center part of the lower surface of the rear storage part 29b upward.

  As described above, since the helmet storage portion 29a of the storage box 29 is arranged using the space above the pivot shaft 7 and the position of the helmet storage portion 29a is lowered, the center of gravity can be lowered, and this The height of the sheet 2 disposed on the top can be reduced.

  Further, the helmet storage portion 29a of the storage box 29 corresponds to the maximum width B portion of the seat 2, and is formed so that the driver's helmet 76 can be placed upside down and stored in the longitudinal direction in the vehicle width direction. Riding ability can be ensured and enlargement in the longitudinal direction of the vehicle body can be avoided.

  On the other hand, the seat 2 has a front main seat 2b and a tandem seat 2c that is raised one step behind. The main footrest 3 has a foot of a driver seated on the main seat 2b. A tandem footrest 81 for passengers seated on the tandem seat 2c is provided behind the main footrest 3.

  The tandem footrest 81 is provided at a position higher than the main footrest 3, and the lower space of the tandem footrest 81 is wide and thick in the vertical direction of the engine 4 as shown in FIG. A crankcase 4h is arranged.

  In addition, 96 is a notch for improving the legging property.

  Thus, by setting the positions of the main footrest 3 and the tandem footrest 81 in accordance with the shape of the engine 4, the main footrest 3 and the tandem footrest 81 are compared with the same height. Then, the position of the main seat 2b can be lowered as much as the position of the main footrest 3 can be lowered, so that the driver's footing property can be improved.

  In addition, the space below the tandem footrest 81 that is higher than the main footrest 3 is used, and the wide and thick crankcase 4h of the engine 4 is arranged here to make effective use of the space. Thus, the engine 4 and the tandem footrest 81 can be efficiently arranged as an appropriate positional relationship.

  In addition, although the tandem footrest 81 formed integrally with the main footrest 3 is shown here as a footrest member for passengers, it is not limited to this, and a separate plate-like one may be used. Moreover, a rod-shaped thing may be sufficient.

  In the above embodiment, the present invention is applied to a scooter type vehicle as a motorcycle. However, the present invention is not limited to this, and the present invention can of course be applied to a general motorcycle such as a so-called sports motorcycle. is there.

  Conventionally, in a motorcycle, the outside air is purified by an air cleaner and guided to a carburetor. The carburetor mixes fuel and outside air, supplies the mixture to the combustion chamber of the engine, and burns in the combustion chamber. The driving force is generated to make the strike.

  However, in such a conventional device, the air cleaner needs a certain size to ensure engine performance and the like. On the other hand, motorcycles are particularly limited in space. I had a hard time setting it up.

  Therefore, in the above-described embodiment, it is an object to improve the space efficiency of the vehicle body by arranging the air cleaner without difficulty while ensuring a large volume of the air cleaner.

  In order to achieve such a problem, in the above embodiment, an air cleaner is disposed on the front side of a head pipe in which a steering shaft having a handle fixed on the upper side is rotatably inserted, and the air cleaner is disposed on the head pipe. An air cleaner arrangement structure for a motorcycle connected to an engine arranged behind the head pipe through an intake duct passing through the vicinity is provided.

  In the embodiment described above, in addition to the above-described configuration, an intake chamber is disposed behind the head pipe and in the middle of the intake duct.

  As described above, according to the above-described embodiment, the air cleaner is disposed on the front side of the head pipe so that the space in front of the head pipe can be effectively used to improve the space efficiency of the vehicle body, and the bed The degree of freedom in layout around the engine behind the pipe can be improved.

  Further, by arranging the air cleaner on the front side of the head pipe and connecting the air cleaner to the rear engine with a relatively small intake duct, interference between the intake system and the steering system can be avoided.

  Furthermore, if the air cleaner is disposed on the front side of the head pipe, the capacity of the air cleaner can be increased, and outside air can be directly introduced into the air cleaner without using a duct, and ram air can be used.

  Furthermore, since the position of the air cleaner is a relatively high position, clean outside air can be introduced without being splashed with dust, muddy water, and the like splashed by the front wheels.

  According to the above embodiment, in addition to the above effects, the intake chamber is arranged in the middle of the intake duct, so that it is possible to suppress the intake side pulsation on the engine side and improve the engine performance. .

1 is a side view of a scooter type vehicle according to an embodiment of the present invention. It is a side view of the scooter type vehicle in a state where the vehicle body covers according to the embodiment are removed. It is a side view of the scooter type vehicle which shows the modification of the storage box which concerns on the embodiment. It is a schematic plan view which shows the flame | frame, storage box, etc. which concern on the same embodiment. It is a front view of the scooter type vehicle of the state which removed the covers concerning the embodiment. It is a schematic plan view which shows the arrangement | positioning position of the air cleaner which concerns on the same embodiment. It is sectional drawing which follows the AA line of FIG. 1 which concerns on the same embodiment. It is the schematic seen from the vehicle rear which shows the arrangement positions of an engine, a fuel tank, a rear cushion, etc. concerning the embodiment. It is a horizontal sectional view showing an engine, a rear arm, and the like according to the same embodiment. It is sectional drawing which shows the connection part of the rear-wheel and left side division part which concern on the embodiment. It is the schematic seen from the vehicle rear which shows the modification of arrangement positions, such as an exhaust pipe concerning the embodiment.

1 Handle 4 Engine 5 Body frame
5a head pipe
11 Steering axis
34 Air cleaner
35 Air intake duct
37 Intake chamber

Claims (5)

Front wheels,
The rear wheel,
Frame,
A handle supported by the frame;
A seat provided behind the handle;
With respect to the front-rear direction, a footrest that is provided between the handle and the seat and has a footrest surface;
A water-cooled engine arranged such that a plane including the rotation axis of the front wheel and the rotation axis of the rear wheel crosses;
A radiator fixed to the frame such that the plane crosses;
A body cover partly disposed on both sides of the radiator;
A fan disposed behind the radiator,
The frame includes a head pipe supporting the handle, an upper frame extending rearward from the head pipe, and a pair of left and right lower frames extending rearward from the head pipe,
The lower frame has a first portion that extends rearward and downward from the head pipe and a second portion that extends rearward from the first portion in a side view,
In the side view, the radiator is disposed in front of the first portion of the lower frame and above the second portion,
A scooter type vehicle in which a part of the fan overlaps with the lower frame in a side view.   The scooter type vehicle according to claim 1, wherein the scooter type vehicle is arranged so that the pair of left and right lower frames and the radiator overlap each other when viewed from the front of the vehicle.   The scooter type vehicle according to claim 1 or 2, further comprising an inner panel formed with a louver that introduces traveling wind and blows air to the radiator.   The scooter type vehicle according to any one of claims 1 to 3, wherein the radiator is formed in a flat rectangular parallelepiped shape. The handle has a steering shaft inserted through the head pipe,
A crown handle connected to the upper end of the steering shaft;
The scooter type vehicle according to any one of claims 1 to 4, wherein a rear end of the radiator is located in front of a rear end of the crown handle in a side view.

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