JP2011031887A - Motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motorcycle equipped with a cooling structure for a V-belt chamber, which includes a forced-cooling structure. <P>SOLUTION: The motorcycle is of an underbone type. An inlet port 14 and an outlet port 15 are formed in the V-belt chamber 13 of an engine 2. At least a part of the inlet port 14 is positioned inward in the vehicle width direction with respect to the V-belt working face of the inner sheave of a primary sheave. At least a part of the outlet port 15 is positioned inward in the vehicle width direction with respect to the V-belt working face of the inner sheave of a secondary sheave. An intake duct 16 extends obliquely upward so that an intake opening 16a may be disposed in a higher position relative to the inlet port 14. An exhaust duct 17 extends obliquely upward so that an exhaust opening 17a may be disposed in a higher position relative to the outlet port 15. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a motorcycle.

  Conventionally, some motorcycles are provided with a V-belt transmission on the engine side. In the case of a unit structure in which the engine and the drive system are integrated, such as a scooter type vehicle, there is one in which the V belt chamber is cooled by passing cooling air. In the case of such a unit structure, since the length between the P and S sheaves is long, the V belt is also lengthened and the belt cooling time is also lengthened. Therefore, there is no need to forcibly introduce cooling air to cool.

  However, in the case of such a conventional type, in the case of a motorcycle type, conversely, since the distance between the P and S sheaves is shortened, the V belt is shortened and the belt cooling time is shortened. More forced cooling is required.

  Therefore, an object of the present invention is to provide a motorcycle including a V-belt chamber cooling structure equipped with a structure for performing forced cooling.

  The motorcycle according to the present invention has a vehicle body frame that is lower in the center than the front end portion and the rear end portion and is substantially V-shaped in a side view of the vehicle, a cover that covers the vehicle body frame, and a front of the vehicle body frame. A front wheel disposed at a portion, a rear wheel disposed at a rear portion of the vehicle body frame, a seat partially disposed above the rear wheel, and at least a portion fixed to the vehicle body frame An engine disposed further forward and disposed between the front wheel and the rear wheel in the vehicle front-rear direction, a rear arm disposed rearward of the engine and swinging, and driving force of the engine to the rear wheel An underbone type motorcycle including a driving force transmission device for transmitting. The engine is disposed below a central portion of the body frame in a side view of the vehicle. The engine has a V-belt chamber that is disposed at least partially below a portion of the cover that is positioned forward and below the seat in a side view of the vehicle, and that accommodates a primary sheave and a secondary sheave. . The V-belt chamber is formed with an inlet and an exhaust port at an upper portion of the V-belt chamber and at a position below the central portion of the vehicle body frame as viewed from the side of the vehicle. At least a part of the suction port is located inward in the vehicle width direction with respect to the V belt contact surface of the inner sheave of the primary sheave, and at least a part of the exhaust port is a V belt of the inner sheave of the secondary sheave. It is located inward in the vehicle width direction from the contact surface. The motorcycle has an intake opening for introducing cooling air at one end, the other end is connected to the intake port, and extends obliquely upward so that the intake opening is disposed at a position higher than the intake port. An air intake duct, at least part of which is covered by the cover, and an exhaust opening for exhausting exhaust air at one end are formed, the other end is connected to the exhaust air outlet, and the exhaust opening is at a position higher than the exhaust air outlet. An exhaust duct extending obliquely upward so as to be disposed, and at least a part of which is covered by the cover.

1 is a schematic side view of a motorcycle showing a routing state of intake / exhaust ducts and the like according to an embodiment of the present invention. It is a top view which shows the V belt room etc. by the side of the engine which concern on the same embodiment. It is a side view which shows the helmet box etc. which concern on the same embodiment. It is sectional drawing which follows a vehicle width direction, such as a helmet box concerning the embodiment. It is the front side top view of the sheet | seat which shows the helmet storage state which concerns on the embodiment. FIG. 3 is a side view of the motorcycle showing the fuel tank arrangement state according to the embodiment. It is sectional drawing which follows the AA line of FIG. 6 which concerns on the same embodiment. It is sectional drawing which follows the BB line of FIG. 6 which concerns on the embodiment. FIG. 3 is a side view of the motorcycle in which the loading platform is arranged on the upper side of the fuel tank according to the embodiment. FIG. 3 is a side view of the motorcycle showing the state of battery arrangement according to the embodiment. It is a top view of the motorcycle which shows the arrangement | positioning state of the battery which concerns on the same embodiment. FIG. 3 is a side view of the motorcycle showing the seat cover storage device and the like according to the same embodiment. FIG. 3 is a plan view of the motorcycle showing the seat cover storage device and the like according to the same embodiment. FIG. 7 is a side view of a motorcycle showing a modification of the seat cover storage device and the like according to the same embodiment. FIG. 6 is a plan view of a motorcycle showing a modification of the seat cover storage device and the like according to the same embodiment. FIG. 3 is a side view of the motorcycle showing an arrangement state of the footboard according to the embodiment. Fig. 3 is a plan view of the motorcycle showing the arrangement state of the footboard according to the embodiment. FIG. 3 is a side view of the motorcycle showing the arrangement of the locking wire winding device according to the embodiment. It is a schematic sectional drawing in alignment with the vehicle width direction which shows the arrangement | positioning state of the winding apparatus of the locking wire which concerns on the embodiment.

  Embodiments of the present invention will be described below.

  1 to 19 show an embodiment of the present invention.

  The motorcycle according to this embodiment is an underbone type motorcycle that can operate the front and rear wheel brakes with the left and right handle levers L and R and that can perform CVT shifting of the engine 2. An engine 2 is fixed to the frame 1), a front wheel 3 is disposed at the front of the frame 1, and a rear wheel 4 is disposed behind the engine 2. The frame 1 and the like are covered with a plurality of covers.

  The frame 1, which is the skeleton, is provided with a head pipe 1d at the front part, and a pair of left and right front inclined parts 1a extend obliquely downward from the head pipe 1d and is substantially horizontal from the front inclined part 1a. A trough portion 1c extends rearward, and a rear inclined portion 1b extends rearwardly behind the trough portion 1c.

  The front inclined portion 1a, the valley portion 1c, and the rear inclined portion 1b are formed in a substantially V shape, and the engine 2 is supported on the V shaped valley portion 1c via a bracket 6. The driving force is transmitted to the rear wheel 4 by a driving force transmission device 7 incorporating a chain or the like. A lower end portion 9 a of a rear cushion 9 is rotatably attached to the rear wheel 4, and an upper end portion 9 b of the rear cushion 9 is rotatably supported by a bracket 10 fixed to the frame 1.

  The engine 2 is a four-cycle engine, and is arranged substantially horizontally so that its cylinder axis is along the vehicle longitudinal direction.

  As shown in FIGS. 1 and 2, the engine 2 is provided with a V-belt chamber 13 in the crankcase 2 a, and a suction port 14 is formed on the front side of the upper portion of the V-belt chamber 13. An air exhaust port 15 is formed on the side. An intake duct 16 that forms an intake passage for introducing cooling air is connected to the intake port 14, and an exhaust duct 17 that forms an exhaust passage that discharges the air in the V-belt chamber 13 to the outside is connected to the exhaust port 15. Has been.

  The intake duct 16 extends forward and obliquely upward along the substantially V-shaped front inclined portion 1 a of the frame 1. An intake opening 16a formed at the upper end of the intake duct 16 is opened downward on the front side of the head pipe 1d.

  The exhaust duct 17 extends rearward and obliquely upward along the substantially V-shaped rear inclined portion 1 b of the frame 1. And the exhaust opening 17b formed in the upper end part of this exhaust duct 17 is opened toward the back on the back side of the upper end part 9a of the rear cushion 9 on the lower side of the seat 21.

  In the V belt chamber 13, as shown in FIG. 2, suction fan blades 23 a that also serve as heat radiating fins are formed on the side opposite to the surface of the P sheave 23 that contacts the V belt 24. A cylindrical air guide 25 is disposed in the vicinity of the suction fan blade 23a, and the suction port 14 provided above the suction fan blade 23a communicates with the suction fan blade 23a.

  Further, an axial flow (propeller) fan 28 is installed further inward of the inner sheave 27a of the S sheave 27 so that the air in the V-belt chamber 13 can be forcibly discharged to the outside. At this time, the exhaust air is guided by the exhaust air guide 29 at the outer edge of the axial fan 28 and sent to the exhaust port 15, and through the exhaust duct 17 connected to the exhaust port 15, the exhaust air is discharged from the exhaust opening 17 a to the outside of the vehicle. To be sent to.

  Although not shown, a one-way water drain mechanism is provided on the lower surface of the V belt chamber 13.

  In such a case, the suction fan blades 23a and the axial flow fan 28 are rotated, and the ram pressure during traveling causes the cooling air to flow from the intake opening 16a of the intake duct 16 through the duct 16 to the V It is introduced into the belt chamber 13. The exhaust air heat-exchanged in the V-belt chamber 13 is discharged to the outside of the vehicle through the exhaust duct 17 and the temperature rise in the V-belt chamber 13 is suppressed.

  When the distance between the PS sheaves 23 and 27 is short, the V belt 24 is inevitably shortened. Therefore, the cooling time of the V belt 24 with respect to heat generation is shortened. It is arranged adjacent to the heat generating part (cylinder, wet centrifugal clutch oil chamber) and easily rises in temperature. Accordingly, since the V belt chamber 13 is easily affected by heat and the temperature becomes too high, the cooling of the V belt chamber 13 is forcibly performed as described above, thereby maintaining the performance of the V belt 24 and maintaining the durability. To improve.

  Further, by setting the duct openings 16a and 17a to a high position using the intake / exhaust ducts 16 and 17, a waterproof and dustproof effect can be obtained as compared with the case of intake and exhaust of cooling air at a low position. Can do.

  Furthermore, the intake / exhaust ducts 16 and 17 are routed along the V-shape of the frame 1 so that they can be easily routed and do not interfere with the arrangement of other equipment. Easy layout. Moreover, since each duct 16 and 17 is extended on the substantially straight line, since ventilation resistance is small, the introduction efficiency of cooling air can be improved.

  Furthermore, the water that has entered the V-belt chamber 13 is discharged through a one-way drain mechanism and is removed by evaporation with flowing cooling air.

  In the embodiment of the present invention, the intake duct 16 and the exhaust duct 17 are routed along the substantially V-shape of the frame 1. However, the present invention is not limited to this, and the internal space of the hollow frame 1 is connected to the intake passage. And can be used as an exhaust passage.

  On the other hand, a helmet box 32 is disposed in a valley portion between the engine 2 and the rear wheel 4. The helmet box 32 is vertically divided into an upper box portion 33 and a lower box portion 34 at a position corresponding to the large diameter portion of the helmet H housed therein.

  The upper box portion 33 and the lower box portion 34 are formed so that the mating portion rises backward.

  The lower box portion 34 is open at the top to form a large-diameter opening 34a, and a rear inclined surface 34b is formed on the rear side. The rear inclined surface 34b also serves as a part of the rear fender 36, that is, A recess 34c for escaping the rear wheel 4 is formed at the center in the vehicle width direction of the rear inclined surface 34b. Further, the bottom portion 34d of the lower box portion 34 is formed in a substantially spherical shape in accordance with the helmet shape, and the trough portions 1c of the frame 1 are front and rear on both the left and right sides of the narrow portion of the bottom portion 34d in the vehicle width direction. It is inserted along the direction. In the vicinity of this portion, the lower box portion 34 is mounted and supported by the frame 1. Accordingly, the lower box portion 34 is formed such that the depth L1 of the box front portion in which the rear side of the helmet H placed substantially upright is accommodated is deep, and the depth L2 of the box rear portion is shallow.

  Further, the upper box portion 33 is formed in a substantially spherical shape so that a part of the helmet H is inserted with the large-diameter opening portion 33a facing downward, and the upper surface is joined to the bottom plate 21a of the seat 21, A part of the bottom plate 21 a forms a part of the upper box part 33. Of course, on the contrary, one member of the bottom plate 21a can be formed by a part of the upper box portion 33.

  In the helmet box 32 formed by the two box portions 33 and 34, as shown in FIG. 3 and the like, the head insertion opening H1 side of the helmet H is located on the rear inclined surface 34b side of the lower box portion 34, and the helmet The rear head side of H is positioned and stored on the bottom 34 d side of the lower box portion 34.

  The seat 21 to which the upper box portion 33 is fixed is formed to have a length that allows a driver and a passenger to be seated, and between the lower front end portion of the upper box portion 33 and the upper front end portion of the lower box portion 34. It can be opened and closed by a front hinge 38 provided at.

  As shown in FIG. 3, the large diameter opening 34a of the lower box portion 34 is opened by rotating the seat 21 forward as shown by a two-dot chain line around the hinge 38 as shown in FIG. .

  As described above, the helmet box 32 is disposed in the valley portion between the engine 2 and the rear wheel 4, and is located at the position corresponding to the large-diameter portion of the helmet H to be stored, and the upper box portion 33 and the lower box. The lower box portion 33 is formed so that the depth L1 of the box front portion is deep, the depth L2 of the box rear portion is shallow, and the seat 21 is a so-called front hinge. Therefore, when the helmet H is taken out, it can be easily taken out if it is lifted rearward and obliquely upward (in the direction of arrow P in FIG. 3), and the ability to put the helmet H in and out of the helmet box 32 is improved. Can be made.

  Moreover, even if the concave portion 34c (the convex portion when viewed from the inside of the helmet box 32) of the lower box portion 34 is fitted into the head insertion opening H1 of the helmet H, the large-diameter opening portion 34a of the lower box portion 34 opens obliquely. Since the depth L2 of the rear portion of the box is formed shallow, it is easy to pull up the helmet H in the direction of arrow P in FIG.

  In addition, the rear inclined surface 34b of the helmet box 32 is used as a part of the rear fender 36, and the concave portion 34c is provided at a position corresponding to the outer periphery of the rear wheel 4, so that the helmet box 32 can be arranged as far back as possible. In other words, the so-called front space can be widened and the leg slipping property can be secured.

  Furthermore, since the upper box portion 33 has an inverted conical shape, the joint surface with the seat bottom plate 21a can narrow the front left and right widths. Therefore, as shown in FIG. It can be set to a length that does not impair.

  Furthermore, since the outer surface of the upper box part 33 is finished with high accuracy to form a design part, there is no need to extend the side cover 40 upward to cover the periphery of the upper box part 33. Therefore, the side cover 40 can be reduced in size. It is possible to reduce the number of components without having to cover the periphery of the upper box portion 33 with another component.

  Moreover, since the helmet box 32 is divided into the upper box part 33 and the lower box part 34 at a position corresponding to the large diameter part of the helmet H to be stored, Good mold release.

  Moreover, since the mating portion of the upper box portion 33 and the lower box portion 34 is along the upper edge of the underbone, the appearance quality is good.

  On the other hand, behind the helmet box 32, as shown in FIGS. 6 to 8, a fuel tank 42 is supported and arranged above the rear wheel 4 so as to be suspended from the frame 1. The fuel tank 42 has a tank main body 42a and a bulging portion 42b bulging from the tank main body 42a on both sides, and extends obliquely upward from the rear of the helmet box 32.

  The tank body 42a is disposed so that the front end portion 42c is substantially in contact with the rear inclined surface 34b of the helmet box 32, and the upper side is located between the pair of left and right rear frames 1e along the substantially horizontal direction above the rear wheel axle. Yes. The tank body 42a has a front end portion 42c formed in a shape that follows the shape of the helmet box 32 disposed in the front (upwardly inclined), and a lower surface of the side cover 40 disposed on the side of the fuel tank 42. The lower surface of the tank main body 42a has a recess 42d that is recessed upward to receive the rear wheel 4 that moves up and down by swinging the swing arm (see FIG. 7 and FIG. 8).

  Further, the tank body 42a is provided with an oil inlet 42e at a high position on the upper surface, and when the oil is supplied, the upper surface of the fuel tank 42 is opened by opening the seat 21 so that the oil can be supplied.

  Further, the bulging portion 42b projects outward in the vehicle width direction from the rear frame 1e and protrudes to near the inner width of the side cover 40 on the outer side to secure a volume (see FIG. 8).

  As shown in FIG. 9, the seat 21 is a so-called single seat with a short length, and a loading platform 44 is rotatably provided on the rear side of the seat 21 via a hinge 45. In this case, by rotating the loading platform 44 around the hinge 45, the upper surface of the fuel tank 42 is opened and can be lubricated.

  The tank body front end portion 42c and the helmet box rear inclined surface 34b can be coupled via an elastic body, and the rear fender 36 and the side cover 40 are joined to the side wall surface of the fuel tank 42 via the elastic body. You can also.

  As described above, because of the box arrangement for storing the full-face helmet H, the bulging portion 42b projecting to the side of the frame 1 is formed at the rear as the adjacent space, and the portion that interferes with the rear wheel 4 is concave. In addition, the tank capacity can be secured by utilizing the space such as along the wall surface of the helmet box 32. Moreover, if the front end portion 42c of the tank body 42a is inserted into the recess 34c of the rear inclined surface 34b of the helmet box 32, the tank capacity can be further increased and the front end portion 42c of the tank body 42a is extended obliquely downward. As a result, the center of gravity can be lowered.

  Further, by covering the side with the side cover 40 or the like, the fuel tank 42 is protected, and by covering the upper side with the seat 21 or the like, the key of the oil filling port 42e can be made unnecessary. The degree of freedom of tank modeling can be secured while expressing the overall design through modeling.

  On the other hand, as shown in FIGS. 10 and 11, a battery 48 is disposed on the front side of the helmet box 32. Specifically, a battery storage container 49 is disposed between the pair of left and right frame troughs 1c from the front of the crankcase 2a of the suspended engine 2 above the cylinder 2b. A space is secured between the bottom surface 49a of the battery storage container 49 and the engine 2 so as not to hinder the flow of the cylinder cooling air. Further, in order to enhance the wind guide effect, the bottom surface 49a of the battery storage container 49 is slightly raised upward. Of course, in order to enhance the wind guide effect, a guide plate or the like may be additionally provided, or a heat insulating sheet may be attached to the bottom surface 49 a of the battery storage container 49 for heat insulation from the cylinder portion 2 b when the vehicle is stopped. In addition to the battery 48, related electrical components may be stored in the battery storage container 49.

  Both sides and the upper surface of the battery storage container 49 are covered with design covers such as a center cover 51 and a leg shield 69, so that maintenance is easy and aesthetics and water shielding are achieved.

  If the battery 48 is arranged in this way, the bottom center of gravity can be achieved while utilizing the empty space, and the lower part of the seat 21 occupies the volume for the large helmet H, and the functional parts are likely to be arranged rearward. By arranging the battery 48 on the front side of the helmet box 32, the weight distribution before and after the vehicle can be favorably performed, and the cooling air can be efficiently introduced.

  Incidentally, in an underbone type motorcycle in which the helmet box 32 is not arranged under the seat 21, there is a sufficient space near the bottom of the seat 21, so that the functional parts are arranged in this portion. Therefore, the battery 48 and the like are also high and the center of gravity tends to be high. In addition, although there is a scooter type vehicle in which the fuel tank 42 is arranged at this position, the engine is a unit swing type arranged on the rear wheel 4 side, and the form is different.

  Further, as shown in FIGS. 12 and 13, a seat cover storage device 55 that stores a seat cover 56 that covers the top of the seat 21 is disposed behind the rear end of the seat 21 and above the rear body cover 54.

  The storage case 57 of the seat cover storage device 55 has an elongated slit-shaped opening 57a on the upper surface, and the seat cover 56 can be taken in and out from the opening 57a. The seat cover 56 is wound around a take-up shaft 58 in the storage case 57 so as to be freely drawn out, and a seat cover end engaging tool 56a provided at the front end of the seat cover 56. The opening 57a is covered. Thus, intrusion of rainwater and dust is prevented in a state where the seat cover 56 is rewound (a state where the seat cover 56 is wound). Further, a drain hole (not shown) is formed at the bottom of the storage case 57.

  Further, the hook 56b is disposed on the seat cover end engaging member 56a, and the upper surface of the seat 21 is covered by pulling out the seat cover 56 and hooking it on the hook stopper 21b at the front end of the seat bottom plate 21a. (See FIG. 11).

  Further, as shown in FIGS. 14 and 15, a part of the grab bar 61 is overhanged, and the overhanging portion 61 a is positioned on the side of the flasher lamp 59 provided on both sides of the storage case 57, so that the flasher lamp 59 can be protected.

  Thus, by pulling out the seat cover 56 from the storage case 57 and hooking the hook 56b on the hook stopper 21b at the front end of the seat bottom plate 21a, the upper surface of the seat 21 is covered. Thereby, it can prevent that the sheet | seat 21 gets wet and can prevent becoming hot.

  Further, the storage case 57 is disposed behind the seat 21, the flasher lamps 59 are provided at both ends of the storage case 57, and the high mount stop lamp is provided on the back surface 57c. Not only functions but also negative factors (high position, wide) peculiar to the case can be turned into positive factors such as improved visibility over conventional motorcycles.

  On the other hand, as shown in FIGS. 16 and 17, the footboard 63 as a footrest is fixed to the frame 1 or the engine 2 so as to cover the upper side of the engine 2, and is extended at two or more places on one side. It is supported.

  The footboard 63 is formed with a driver's footrest 63a and a passenger's footrest 63b extending rearward from the driver's footrest 63a, and this driver's footrest 63a. A notch 63c is formed at a rear position of the engine 2 between the passenger's footrest 63b and the passenger.

  As shown in FIG. 16, the driver's footrest 63a extends horizontally near the center of the crankcase 2a in the front-rear direction below the crank center of the engine 2, and the rear part rises backward from the middle. Thus, the rear end portion of the passenger footrest portion 63b passes above the axial center of the rear wheel 4 and is located above the exhaust pipe 73 and the muffler 74.

  In addition, as shown in FIG. 17, the footboard 63 is divided into a driver footrest 63a and a passenger footrest 63b on the side where the kick arm 65 is provided. The passenger footrest 63b includes a horizontal plate 63d that extends substantially in the horizontal direction, and a rising wall 63e that rises upward from a side edge of the horizontal plate 63d near the vehicle center. The length extending from the rear end of the engine 2 to the rear cushion 9 is formed.

  As shown in FIG. 16, the passenger footrest 63 b is fixed with screws 67 at several places on a footboard stay 66 fixed to the engine 2 side.

  The front end of the footrest 63a for the driver of the footboard 63 is connected to the lower end of the leg shield 69, and the width of the front end of the footrest 63a for the driver of the footboard 63 in the vehicle width direction. Is formed substantially the same as the width in the vehicle width direction of the lower end portion of the leg shield 69. The outer edge of the footrest portion 63a for the driver of the footboard 63 extends outward from the front end portion toward the rear, and then a notch portion 63c is formed, and the passenger footrest portion behind the notch portion 63c is formed. 63b has a smaller overhang amount than the driver's footrest 63a, and the rear end portion is directed toward the center of the vehicle so as to be safer against a collision from the rear.

  In addition, the footboard 63 has an inner edge shape in which a driver's footrest 63a is provided with an escape portion for escaping the engine 2 and the like, and the passenger's footrest 63b is provided with a swinging rear arm 71, driving force transmission. An escape portion that escapes the device 7 is formed.

  Thus, by covering the engine 2 fixed to the frame 1 with the foot board 63, it is possible to prevent the hot air of the engine 2 from being transmitted to the passenger side.

  Further, since a notch 63c is formed at a position behind the engine 2 of the footboard 63, hot air from the engine 2 can be removed through the notch 63c, and an occupant is provided via the notch 63c. Can attach a foot, and can improve a footing property. Further, when the kick arm 65 is provided, it can also be used as a rotating space.

  Furthermore, by making the leg shield 69 and the footboard 63 continuous, the muddy water splashed forward can be blocked. In addition, by making the leg shield 69 and the footboard 63 continuous, it is easy to guide the traveling wind to the engine 2 disposed under the footboard 63, and the cooling performance can be improved. Since it can discharge | emit via the notch part 63c, cooling efficiency can be improved.

  Furthermore, since the passenger footrest 63b is independently extended rearward, there is a problem of how to ensure the strength. However, the passenger footrest 63b includes a rising wall 63e. And the horizontal plate portion 63d to form a substantially L-shaped cross section, the strength can be ensured. Moreover, since the rear wheel 4 side can be covered by the rising wall 63e, contact with the swinging rear arm 71 and the rear wheel 4 can be prevented.

  If the horizontal plate portion 63d of the passenger's footrest portion 63b can be folded upward, the kick arm 65 can be folded by folding the horizontal plate portion 63d upward when there is no passenger. There is no hindrance when stepping on. Of course, the side where the kick arm 65 is not disposed can also be divided into front and rear.

  By the way, such a motorcycle can operate the front and rear wheel brakes with the left and right handle levers L and R, and can perform CVT shifting of the engine 2. Therefore, the footboard 63 has a rear brake pedal hole, a change lever escape notch, etc. Is unnecessary.

  In addition, an auxiliary carrier can be attached to the passenger footrest 63b to add a load function for luggage. As the luggage, a thin article such as an attache case is suitable.

  Further, as shown in FIGS. 18 and 19, a winding device 77 for the locking wire 76 is disposed in the side cover 40 on the rear side of the fuel tank 42 and above the rear wheel 4. The winding device 77 is disposed in a storage box 78 fixed to the frame 1 or the like with a winding shaft 79 biased in the winding direction, and an original end of a lock wire 76 is attached to the winding shaft 79. A hook-shaped hook portion 76a is fixed at the tip, and this hook portion 76a protrudes downward from the bottom surface portion in a state where the hook portion 76a is in contact with the peripheral edge portion of the drawer opening 78a of the storage box 78. In this state, since the winding shaft 79 is biased in the winding direction, the hook portion 76a is in contact with the peripheral edge portion of the drawer opening 78a of the storage box 78, thereby preventing rattling. Has been.

  By pulling with the hook portion 76a, the locking wire 76 can be pulled out from the storage box 78 and pulled out downward between the side cover 40 and the rear fender 36 inside. Then, the hook portion 76 a and the lock wire 76 are inserted into the locking hole 80 a of the locking member 80 fixed to the rear frame 71 after passing through the rim 4 a of the rear wheel 4. Is locked. The locking mechanism 81 can be locked or unlocked by key operation or remote control.

  Instead of the hook portion 76a, a keyed catch mechanism such as a handcuff can be provided.

  By arranging the winding device 77 in the side cover 40 in this way, the lock wire 76 is stored in the storage box 78 and is not exposed to the outside when the lock is not used. Become.

  Another invention disclosed in the specification of the present application is a vehicle V-belt chamber cooling structure that is equipped with a structure that performs forced cooling, that facilitates layout of other equipment, and that has good cooling air introduction efficiency. The issue is to provide.

  In order to achieve such an object, another invention disclosed in the present specification is that an engine is fixed to a vehicle body frame, an intake passage for introducing cooling air into a V belt chamber of the engine, and air in the V belt chamber. In the cooling structure to the V-belt chamber provided with an exhaust passage for discharging to the outside, the engine is disposed in a substantially V-shaped valley portion of the vehicle body frame, and the intake passage and the exhaust passage are connected to the vehicle body frame. A v-belt chamber cooling structure for a vehicle provided along a substantially V-shape is characterized.

  According to the other invention, the intake / exhaust passage is provided along the V-shape of the vehicle body frame, so that it is easy to provide the layout of other equipment. In addition, since each passage extends substantially in a straight line, the airflow resistance is small, so that a practically beneficial effect is achieved that the efficiency of introducing cooling air can be improved.

DESCRIPTION OF SYMBOLS 1 Body frame 2 Engine 3 Front wheel 4 Rear wheel 13 V belt chamber 16 Intake duct 17 Exhaust duct

Claims (1)

A vehicle body frame having a lower central portion than the front end portion and the rear end portion and formed in a substantially V shape in a vehicle side view;
A cover covering the body frame;
A front wheel disposed at a front portion of the vehicle body frame;
A rear wheel disposed at the rear of the body frame;
A seat partly disposed above the rear wheel;
An engine that is fixed to the vehicle body frame, at least part of which is disposed in front of the seat, and disposed between the front wheel and the rear wheel in a vehicle front-rear direction;
A rear arm which is arranged behind the engine and swings;
A driving force transmission device for transmitting the driving force of the engine to the rear wheels;
Underbone type motorcycle equipped with
The engine is disposed below a central portion of the body frame in a vehicle side view,
In the engine, at least a part thereof is disposed below a portion of the cover that is positioned forward and below the seat in a side view of the vehicle, and a V-belt chamber that houses a primary sheave and a secondary sheave is formed.
The V-belt chamber is formed with a suction port and an air discharge port at an upper portion of the V-belt chamber and at a position below the central portion of the vehicle body frame in a side view of the vehicle.
At least a portion of the suction port is located inward in the vehicle width direction from the V belt contact surface of the inner sheave of the primary sheave,
At least a part of the exhaust port is located inward in the vehicle width direction from the V belt contact surface of the inner sheave of the secondary sheave,
An intake opening for introducing cooling air is formed at one end, the other end is connected to the intake port, and the intake opening extends obliquely upward so as to be disposed at a position higher than the intake port, at least a part of which is An intake duct covered by the cover;
An exhaust opening for exhausting exhaust air is formed at one end, the other end is connected to the exhaust air outlet, and extends obliquely upward so that the exhaust opening is disposed at a position higher than the exhaust air outlet, at least a part of which is An exhaust duct covered by the cover;
Motorcycle equipped with.

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