JP2006096117A - Low-floor type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-floor type vehicle structured so that rear wheels are borne in the rear part of a swing arm borne by the body frame swingably up and down, a rear cushion is installed between the swing arm and the body frame, and that an accommodating member is installed in a part under the seat whereon a driver is seated and over the rear cushion, wherein such an arrangement is introduced that the bottom wall of the accommodating member can be set in a still lower position while a gap is reserved in the area to the rear cushion, and thereby the accommodating capacity of the accommodating member is secured large. <P>SOLUTION: At the undersurface of the bottom wall 140a of the accommodating member 140, an accommodation recess 142 to accommodate the rear cushion 72 is formed in such an arrangement that the center axis of the rear cushion 72 is positioned over the undersurface of the bottom wall 140a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a vehicle seat in which a rear wheel is pivotally supported at a rear portion of a swing arm supported so as to be swingable up and down by a vehicle body frame, a rear cushion is provided between the swing arm and the vehicle body frame, and a vehicle driver sits. And a lower floor type vehicle in which a storage member is disposed above the rear cushion.

Such a low-floor type vehicle is known from Patent Document 1, for example.
JP 2004-116423 A

  By the way, in the scooter type motorcycle disclosed in Patent Document 1, the bottom surface of the storage box, which is a storage member, is disposed above the rear cushion, and it is necessary to provide a gap with the rear cushion. There is a limitation in trying to set the bottom surface lower in order to secure the capacity of the battery.

  The present invention has been made in view of such circumstances, and can increase the storage capacity of the storage member by setting the bottom wall of the storage member to a lower position while ensuring a gap with the rear cushion. An object of the present invention is to provide a low floor type vehicle that can be secured.

  In order to achieve the above object, according to the present invention, a rear wheel is pivotally supported at a rear portion of a swing arm supported so as to be swingable up and down by a body frame, and a rear wheel is provided between the swing arm and the body frame. In a low-floor type vehicle in which a cushion is provided and a storage member is disposed below a passenger seat on which a vehicle driver sits and above a rear cushion, the rear cushion is placed on the bottom surface of the bottom wall of the storage member. Is provided with a storage recess for storing in a position above the lower surface of the bottom wall.

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, the storage member is a storage box for storing a helmet or the like.

  According to a third aspect of the invention, in addition to the configuration of the first aspect of the invention, the storage member is a fuel tank that stores fuel.

  According to a fourth aspect of the present invention, in addition to the configuration of the second aspect of the present invention, the rear cushion has an axis extending in the front-rear direction and is provided between the swing arm and the vehicle body frame, and the bottom of the storage box The storage recess is provided at the center in the width direction of the wall.

  Furthermore, in the invention of claim 5, in addition to the structure of the invention of claim 4, the storage recess is formed so that a jet type helmet can be stored in the storage box with the visor raised. It is characterized by being.

  According to the first aspect of the present invention, the rear cushion is stored in the storage recess provided on the bottom surface of the bottom wall of the storage member so that the center axis thereof is positioned above the bottom surface of the bottom wall of the storage member. The bottom wall of the storage member can be set at a lower position while ensuring a gap with the rear cushion, and a large storage capacity of the storage member can be ensured.

  According to the invention of claim 2 or claim 3, the bottom wall of the storage box or fuel tank can be set at a lower position while avoiding interference with the rear cushion, and the capacity of the storage box or fuel tank can be reduced. It is possible to secure a large amount.

  According to invention of Claim 4, the volume of the width direction both sides of a storage box can be increased.

  Furthermore, according to the fifth aspect of the present invention, the jet type helmet can be effectively stored in the storage box.

  1 to 6 show a first embodiment of the present invention. FIG. 1 is a side view of a scooter type motorcycle. FIG. 2 is a longitudinal side view showing an enlarged front portion of the scooter type motorcycle. 3 is a front view of the engine, FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 1, FIG. 5 is a longitudinal side view showing the rear part of the scooter type motorcycle enlarged, and FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG.

  First, in FIG. 1, a body frame F of the scooter type motorcycle includes a front fork 15 that pivotally supports a front wheel WF and a head pipe 17 that supports a steering handle 16 connected to the front fork 15 so as to be steerable. A pair of left and right down pipes 18 extending rearward and downward from the head pipe 17 and the head pipe 17 are provided below the down pipes 18 and the rear pipes are inclined more steeply than the down pipes 18. A pair of left and right lower pipes 19 that extend, and a pair of left and right main pipes 20 that are connected to the lower ends of the lower pipes 19 and extend rearward, and the lower ends of the down pipes 18 are connected to the middle portion. Be prepared.

  Engine hanger brackets 19a extending in the extending direction of the rocker arm pilots 19 are joined to the lower ends of the lower pipes 19. The main pipes 20 are extended rearward from the vicinity of the joints between the lower pipes 19 and the engine hanger brackets 19a. In this embodiment, the engine hanger brackets 19a are lower ends of the lower pipes 19 of the main pipes 20 ... It will serve as a connecting member to. Further, reinforcing connecting plates 21 are provided between intermediate portions of the down pipes 18 and the lower pipes 19 that are paired on the left and right.

  Referring also to FIG. 2, the main pipe 20 is bent so as to swell upward, a front half inclined part 20a extending rearwardly from the lower end of the lower pipe 19, and a rear half inclined part 20b extending rearwardly lower. A curved portion 20c connecting the rear end of the inclined portion 20a and the front end of the rear half inclined portion 20b is integrally formed, and as shown in FIG. 3 to be described later, the vertical direction is longer than the left-right direction. It consists of a rectangular cylinder with a right angle. Moreover, the lower end of the down pipe 18 is connected to the middle portion of the front half inclined portion 20a by welding.

  A connecting plate 22 is joined by welding to the front part of the rear half inclined part 20b, the front end of the seat rail 23 extending rearward is connected to the connecting plate 22, and the rear part of the pair of left and right seat rails 23 ... Are integrally connected to each other. Moreover, in this embodiment, a part of the front end side of the connecting plate 22 is arranged so as to cover the bent portion 20c, whereby the connecting plate 22 and the seat rail 23 are efficiently connected to the rear half inclined portion 20b of the main pipe 20. Can be joined to the front. Further, the rear ends of the rear pipes 24 that extend rearward with the front ends joined to the rear ends of the rear inclined portions 20b are joined to the rear portions of the seat rails 23 by welding, respectively. Further, reinforcing connecting plates 25 are provided between the middle portions of the seat rails 23 and the rear pipes 24 that are paired on the left and right.

  Referring also to FIG. 3, in the vehicle body frame F, a power unit PA including an engine EA that is four cycles and a continuously variable transmission M that changes the output of the engine EA is to drive the rear wheels WR. Installed. The engine EA is configured, for example, as a water-cooled single cylinder, and is opposed to the crankcase 28, a cylinder block 29 having a cylinder axis extending vertically and extending upward from the crankcase 28, and the crankcase 28. The cylinder head 30 is coupled to the cylinder block 29 on the side, and the head cover 31 is coupled to the top of the cylinder head 30.

  By the way, first engine hangers 32 are provided on the front half inclined portions 20a of the main pipes 20 in the vicinity of the lower ends of the down pipes 18 in the vehicle body frame F, and the front of the cylinder block 29 in the engine EA. Thus, the upper part of the crankcase 28 is supported by the first engine hangers 32. Also, second engine hangers 33 are attached to the lower ends of the engine hanger brackets 19a connected to the lower ends of the lower pipes 19 with a pair of bolts 43, and the lower part on the front side of the crankcase 28 is the second engine hanger. 33... Are fastened and supported by bolts 44.

  In this way, the engine EA can be supported by the main pipes 20 at a portion having high rigidity, and the first engine hanger 32 has a pair of the extension lines of the center line of the down pipe 18 from both sides. The crankcase 28 of the engine EA is provided on the extension line of the center line of the down pipes 18 by fastening the bolts 27. It is supported by the first engine hanger 32... The crankcase 28 can be supported by the first engine hanger 32.

  In FIG. 4, a crankshaft 34 rotatably supported by the crankcase 28 is integrally provided with a pair of crank webs 34a, 34a and a crank pin 34b connecting the crank webs 34a, 34a. A piston 35 slidably fitted into the cylinder block 29 is connected to a crank pin 34b between the two crank webs 34a, 34a via a connecting rod 36.

  One end of the crankshaft 34 protrudes from the crankcase 28 on the left side along the traveling direction of the motorcycle, and a rotor 37 fixed to one end of the crankshaft 34 and a stator accommodated in the rotor 37. The AC generator 39 is covered with a left cover 40 coupled to the crankcase 28, and the stator 38 is fixed to the left cover 40.

  The camshaft 41 is rotatably supported by the cylinder head 30 so as to constitute a part of a valve operating device that opens and closes an intake valve and an exhaust valve (not shown) disposed in the cylinder head 30. A timing transmission device 42 is provided between the crankcase 28 and the crankshaft 34 between the AC generator 39, and the rotational power of the crankshaft 34 is halved by the timing transmission device 42. And is transmitted to the camshaft 41.

  A case main body 45 extending rearward from the crankcase 28 is connected to the crankcase 28 on the right side along the traveling direction of the motorcycle. A right cover 46 fastened to the right side of the case main body 45 and the case A gear case 47 fastened to the rear right side of the main body 45 and the case main body 45 constitute a transmission case 48. A transmission chamber 49 is formed between the case main body 45 and the right cover 46, and the case main body 45 and the gear case 47 are formed. A gear chamber 50 is formed between them.

  The transmission chamber 49 of the transmission case 48 houses a belt-type continuously variable transmission M for continuously changing the rotational power of the crankshaft 34 and transmitting it to the rear wheel side. The continuously variable transmission M has a drive pulley 51 attached to the other end of the crankshaft 34 facing the transmission chamber 49, and an axis parallel to the crankshaft 34, and is rotatable to the rear of the transmission case 48. And a drive pulley 51 and an endless belt 53 that is wound around the driven pulley 52.

  The drive pulley 51 changes the winding radius of the belt 53 by a sliding operation of a slide cylinder 56 that slides in the axial direction of the crankshaft 34 by the operation of an electric motor (not shown). The driven pulley 52 changes the winding radius to the side opposite to the drive pulley 51 in accordance with the change in the winding radius of the belt 53 at the drive pulley 51. Between the driven pulley 52 and the transmission shaft 54, the driven pulley 52 changes the winding radius. A centrifugal clutch 55 is interposed.

  The other end side of the transmission shaft 54 is disposed facing the gear chamber 50, and an output shaft 57 having an axis parallel to the transmission shaft 54 is rotatably supported by the case main body 45 and the gear case 47. Accommodates a reduction gear train 58 that reduces the rotational power of the transmission shaft 54 and transmits it to the output shaft 57. One end portion of the output shaft 57 passes through the rear portion of the gear case 47 and protrudes to the left side of the rear portion of the gear case 47.

  By the way, the axle 59 of the rear wheel WR is pivotally supported by the rear part of the swing arm 60, and between the rear part of the case main body 45 and the gear case 47 constituting a part of the transmission case 48 is provided at the front end of the swing arm 60. A pair of support arm portions 60a and 60b sandwiching each other are provided. Thus, one support arm portion 60a is supported on the output shaft 57 so as to be relatively rotatable, and the other support arm portion 60b is provided on the rear portion of the case main body 45 so as to be coaxial with the output shaft 57. The shaft 61 is rotatably supported. That is, the front end portion of the swing arm 60 is supported by the transmission case 48 so as to be swingable up and down.

  One end of the output shaft 57 protrudes from one support arm portion 60a of the swing arm 60, and the drive sprocket 62 is fixed to the protrusion portion of the output shaft 57 from the support arm portion 60a. On the other hand, a driven sprocket 63 is fixed to the axle 59 of the rear wheel WR on the left side along the traveling direction of the motorcycle, and an endless chain 64 is wound around the drive sprocket 62 and the driven sprocket 63. Moreover, a sprocket cover 65 that covers the drive sprocket 62 is attached to the outer surface of the front end of the support arm 60a.

  A pair of brackets 66 extending upward are provided at the rear portion of the transmission case 48, and these brackets 66 are supported by the rear end portion of the main pipe 20. Further, as clearly shown in FIG. 1, a pair of main stand shafts 67 are coaxially provided at the lower rear side of the transmission case 48, and the main stand 68 can be rotated by the main stand shafts 67. Is pivotally supported. Further, a cross pipe 71 is installed between the bent portions 20c of the main pipes 20, and between the cross pipe 71 and a cushion bracket 60c provided at the front portion of the swing arm 60, A rear cushion 72 having an axis extending in the front-rear direction is provided.

  Referring to FIG. 2, the downstream end of the throttle body 74 is connected to the front side surface of the cylinder head 30. Further, a fuel tank 90A is disposed so as to straddle both down pipes 18 in the vehicle body frame F, and an air cleaner 76A disposed in front of the engine EA and below the fuel tank 90A is disposed at the upstream end of the throttle body 74. The fuel injection valve 77 is attached to the throttle body 74.

  The air cleaner 76 </ b> A has a cleaner element 149 housed in a cleaner case 148. The cleaner case 148 includes a bowl-shaped first case member 150 opened to the rear side and a bowl-shaped second case member 151 opened to the front, in the cleaner case 148 in the front unpurified chamber 152 and the rear purification. The cleaner element 149 partitioned into the chamber 153 is joined so as to be sandwiched between the peripheral portions of the case members 150 and 151.

  The first case member 150 is provided with an outside air introduction pipe 154 leading to the unpurified chamber 152 so as to introduce outside air from the front of the air cleaner 76B, and at the upstream end of the throttle body 74 via the second case member 151. An intake pipe 155 with the downstream end connected is housed in the purification chamber 153.

  A radiator 91 for cooling the engine coolant heated by the water-cooled engine EA is disposed below the front portion of the first case member 150 in the air cleaner 76A so as to be positioned in front of the engine EA. The The lower part of the radiator 91 is provided with mounting arm portions 168 that project toward the second engine hanger 33 side of the vehicle body frame F. The mounting arm portions 168. Are supported by mounting brackets 169... Further, the upper portion of the radiator 91 is provided with mounting arm portions 171... Projecting toward the upper lower pipe 19..., And the mounting arm portions 171 are not shown in the brackets 172 provided on the lower pipe 19. It is supported via a mount rubber. That is, the radiator 91 is supported by the lower pipes 19 and the second engine hangers 33 of the vehicle body frame F.

  An air guide plate 156 for guiding the traveling wind from the front to the radiator 91 side is integrally provided at a lower portion of the first case member 150 constituting a part of the cleaner case 148 in the air cleaner 76A. 156 extends from the lower part of the front end of the cleaner case 148 toward the radiator 91 so as to incline backward and downward.

  The upstream end of the exhaust pipe 95 is connected to the rear side surface of the cylinder head 30 in the engine EA, and the downstream end of the exhaust pipe 95 is connected to an exhaust muffler 97 disposed on the right side of the rear wheel WR.

  As clearly shown in FIG. 2, a lock mechanism 101 that can switch between a locked state and an unlocked state of the steering handle 16 is provided in front of the head pipe 17 at the front end of the vehicle body frame F. Switching operation is performed by operating a key cylinder lock 102 disposed at a position separated from the lock mechanism 101.

  Incidentally, a stay 111 extending obliquely upward in front of the head pipe 17 is fixed to the head pipe 17, and a meter 112 disposed in front of the center portion of the steering handle 16 is attached to the upper end of the stay 111. A supporting member 114 to be supported is attached to the upper portion of the stay 111.

  The cylinder body 115 of the key cylinder lock 102 is attached to the stay 111 in the vicinity of the meter 112, and a rotor 117 that rotates in response to insertion and rotation of a regular key 116 is provided in the cylinder body 115. When the link member 121 swings in response to the rotation of the rotor 117, the lock mechanism 101 operates to switch between the locked state and the unlocked state.

  Focusing on FIG. 1, the fuel tank 90A, the air cleaner 76A, the power unit PA, and the vehicle body frame F are covered with a vehicle body cover 125 made of synthetic resin. The vehicle body cover 125 is a front portion of the head pipe 17. A front cover 126 that covers the upper part of the front wheel WF and to which the head lamp 113 is attached, a center cover 127 that covers the head pipe 17 and the fuel tank 90A from the rear side and that is continuous with the front cover 126, and left and right sides of the front cover 126 A pair of left and right leg shields 128 that are joined to cover the front of the occupant's legs, a pair of left and right footrests 129 that are connected to the leg shield 128 to support the occupant's feet, and their legs (see FIG. 3). It bulges upward between the loading parts 129 and continues to the rear part of the sentan cover 127. A floor tunnel portion 130, a skirt portion 131 (see FIG. 3) that hangs downward from the outer edge of each of the footrest portions 129, and a footrest portion 129 that covers the left and right sides of the rear portion of the body frame F. And a rear cover 132 joined to the floor tunnel portion 130.

  On the rear cover 132, a tandem riding seat 133 that allows a vehicle driver who steers the steering handle 16 to be seated and allows the passenger to rest behind the vehicle driver is provided so as to be openable and closable. . By the way, the riding seat 133 is disposed behind the fuel tank 90A, and a center cover 127 that covers the fuel tank 90A from the rear side of the vehicle body cover 125, and a floor that continues to the rear portion of the center cover 127. The tunnel portion 130 and the rear cover 132 on which the riding seat 133 is provided, the undercut space 135 having a substantially U shape in side view, the fuel tank 90A and the air cleaner 76A on the front side, and the riding seat 133 on the rear side. The radiator 91 and the two down pipes 18 and the two lower pipes 19 in the vehicle body frame F are also arranged in front of the leg space 135.

  5 and 6, a storage box 140, which is a storage member, is disposed below the riding seat 133 so that the upper end opening can be opened and closed by the bottom plate 141 of the riding seat 133. The storage box 140 is supported by the seat rails 23 and the rear pipes 24.

  By the way, the storage box 140 has an axis extending in the front-rear direction and is disposed above the rear cushion 72 provided between the cross pipe 71 and the swing arm 60 of the vehicle body frame F, and the bottom wall 140a of the storage box 140 is disposed. The storage recess 142 is provided for storing the rear cushion 72 such that the axis thereof is located above the lower surface of the bottom wall 140a. Moreover, as clearly shown in FIG. 6, the storage recess 142 is disposed at the center in the width direction of the storage box 140, and the storage recess 142 raises the jet helmet 143 by the visor 144. It is formed so that it can be stored in the storage box 140 in the state where it is placed.

  Next, the operation of the first embodiment will be described. For a ride on which a vehicle driver who operates a head pipe 17 at the front end of the body frame F and a steering handle 16 supported so as to be steerable by the head pipe 17 sits. A substantially U-shaped under bore space 135 disposed between the seat 133 and the seat 133 is formed by the vehicle body cover 125, and the vehicle body frame F extends from the head pipe 17 to the left and right in front of the under bore space 135. A pair of down pipes 18, a pair of left and right lower pipes 19 that are disposed below the down pipes 18 and that extend rearwardly downward from the head pipe 17, and both lower pipes 19 that extend rearward from the lower ends of the lower pipes 19. A pair of left and right main pipes 20 with the lower ends of the down pipes 18 connected to the middle portion. A first-half inclined portion 20a extending from the lower end of the lower pipe 19 to the rear and the lower end of the down-pipe 18 being connected to the middle portion, a second-half inclined portion 20b extending rearwardly, and a first-half inclined portion that is bent so as to bulge upward. A bent part 20c connecting the rear end of 20a and the front end of the rear half inclined part 20b is integrally formed.

  According to such a structure of the vehicle body frame F, the main pipe 20 is formed in a shape that extends rearwardly from the lower end of the lower pipe 19, and further bends upward after being bent upward. The degree of freedom of the shape of the engine EA can be increased, and the curved portion 20c in the middle of the main pipe 20 can be made appropriate, so that the maneuverability can be optimized. it can.

  Further, the first engine hanger 32 that supports the engine EA is provided in the front half inclined portion 20a of the main pipe 20 in the vicinity of the lower end of the down pipe 18 so that the rigidity is enhanced by the connection with the down pipe 18. The engine EA can be supported on the vehicle body frame F efficiently and reliably by supporting the engine EA on the main pipe 20.

  Further, the front ends of the pair of left and right seat rails 23 extending rearward so as to support the riding seat 133 are joined to the front portions of the rear half inclined portions 20b of the main pipes 20 respectively, thereby the main pipe. 20 and the seat rails 23 can be made appropriate, and the rigidity of joining the seat rails 23 to the main pipes 20 can be increased and balanced.

  In addition, since the main pipes 20 are made of rectangular tubes having a right-angled quadrilateral cross-sectional shape whose vertical direction is longer than the horizontal direction, the vertical rigidity of the main pipes 20 is high, and in the horizontal direction. By providing a bend, more comfortable maneuverability can be obtained.

  By the way, the front part of the swing arm 60 that pivotally supports the rear wheel WR at the rear part is supported by the transmission case 48 so as to be swingable up and down, and is provided between the body frame F and the swing arm 60 and extends in the front-rear direction. The storage box 140 is disposed above the rear cushion 72 having an axis and below the riding seat 133 on which the vehicle driver sits. The rear cushion 72 is located at the bottom of the bottom wall 140a of the storage box 140. Since the storage recess 142 is provided so that the axis is positioned above the lower surface of the bottom wall 140a, the bottom wall 140a of the storage box 140 is positioned at a lower position while providing a gap with the rear cushion 72. Therefore, it is possible to ensure a large capacity of the storage box 140.

  Moreover, the rear cushion 72 has an axis extending in the front-rear direction and is provided between the swing arm 60 and the vehicle body frame F, and the storage recess 142 is provided in the center in the width direction of the bottom wall 140a of the storage box 140. Since the volume on both sides in the width direction of the storage box 140 can be increased and the storage recess 142 is formed so that the jet helmet 143 can be stored in the storage box 140 with the visor 144 raised, The type helmet 143 can be effectively stored in the storage box 140.

  A radiator 91 is disposed in front of the engine EA, and an air cleaner 76A is disposed above the radiator 91. The air cleaner 76A extends toward the radiator 91 so as to guide traveling air from the front to the cleaner case 148 of the air cleaner 76A. Since the air guide plate 156 is integrally provided continuously, it is possible to effectively reduce the number of components and cool the radiator 91 by effectively guiding the traveling air to the radiator 91 side.

  In addition, since the undercut space 135 is disposed behind the fuel tank 90A, the air cleaner 76A, and the radiator 91, in the scooter type motorcycle, the volume of the fuel tank 90A and the air cleaner 76A is secured, and the bulk of the foot space 135 is provided behind the radiator 91. It is possible to draw out the wind guide effect of the wind guide plate 156 in such a manner that a member having a gap is not disposed.

  Further, a lock mechanism 101 that can switch between a locked state and an unlocked state of the steering handle 16 and a key cylinder lock 102 that applies a switching operation force to the lock mechanism 101 are arranged apart from each other. One end of the link member 121 is connected to the rotor 117 of the key cylinder lock 102 so as to swing according to the rotation of the rotor 117, and the lock mechanism 101 is locked according to the swing of the link member 121. It is configured to operate to switch between a state and an unlocked state, and is connected to the other end of the link member 121.

  Therefore, the operation force from the key cylinder lock 102 is transmitted to the lock mechanism 101 side by the swing of the link member 121, and the operation force transmission structure between the key cylinder lock 102 and the lock mechanism 101 is reduced in the number of parts. It can be configured easily, and a moderation feeling can be obtained in the operation of the key cylinder lock 102, so that the merchantability can be improved.

  Further, since the key cylinder lock 102 is disposed in front of the steering handle 16 and in the vicinity of the meter 112, the operation of the key cylinder lock 102 by the vehicle driver can be facilitated.

  FIG. 7 is a side view of a scooter type motorcycle according to a second embodiment of the present invention, FIG. 8 is a longitudinal side view showing an enlarged front portion of the scooter type motorcycle, and FIG. 9 is a power unit in a state where an intake system is omitted. FIG. 10 is a view taken along the arrow 10 of FIG. 9, FIG. 11 is a view taken along the arrow 11 of FIG. 9, and FIG. 12 is a sectional view taken along the line 12-12 of FIG. Are denoted by the same reference numerals, and detailed description thereof is omitted.

  7 and 8, the body frame F of the scooter type motorcycle is configured in the same manner as in the first embodiment. The body frame F includes an engine EB having four cycles and the engine EB. A power unit PB comprising a continuously variable transmission M that shifts the output of the rear wheel WR is mounted to drive the rear wheel WR.

  Referring to FIGS. 9 to 11 as well, the engine EB is configured, for example, as a water-cooled two-cylinder V-type, and has a crankcase 28 and a cylinder axis slightly tilted forward. A front bank BF extending forward from the crankcase 28, and a rear bank BR extending upward from the crankcase 28 so as to form a V shape with the front bank BF. Each bank BF, BR The cylinder blocks 29F and 29R coupled to the crankcase 28, the cylinder heads 30F and 30R coupled to the cylinder blocks 29F and 29R on the opposite side of the crankcase 28, and the tops of the cylinder heads 30F and 30R. Head covers 31F and 31R are provided.

  The first engine hanger 32 provided in the front half inclined portion 20a of the main pipes 20 in the vicinity of the lower end of the down pipe 18 in the vehicle body frame F includes a portion between the front and rear banks BF and BR of the engine EB. The upper portion of the crankcase 28 is supported, and the rear bank BR is disposed between the bent portions 20c of the main pipes 20. Further, the lower part of the crankcase 28 is supported below the front bank BF by second engine hangers 33 provided integrally with the front ends of the main pipes 20.

  In this way, the engine EB can be supported by the main pipes 20 in a highly rigid portion, and the first engine hanger 32 has a pair of sandwiching the extension line of the center line of the down pipe 18 from both sides. The crankcase 28 of the engine EB is provided on the extension line of the center line of the down pipes 18 by fastening the bolts 27. It is supported by the first engine hanger 32... The crankcase 28 can be supported by the first engine hanger 32.

  In FIG. 12, the pistons 35 of the banks BF, BR are connected to crank pins 34b between the crank webs 34a, 34b of the crankshaft 34 rotatably supported by the crankcase 28 via connecting rods 36. Commonly connected.

  Further, the two cylinder heads 30F are configured so as to constitute a part of a valve operating device that opens and closes intake valves and exhaust valves (not shown) disposed in the cylinder heads 30F, 30R of the banks BF, BR, respectively. , 30R, a camshaft 41 rotatably supported by the crankshaft 34 between the crankcase 28 and the AC generator 39 is provided between the camshaft 41 and the AC generator 39. Is transmitted to the camshafts 41... By the timing transmission device 42.

  A pair of brackets 66 provided at the rear portion of the transmission case 48 coupled to the crankcase 28 and extending upward are supported by the rear end portion of the main pipe 20. Further, a rear cushion 72 having an axial line extending in the front-rear direction is interposed between a cross pipe 71 installed between the bent portions 20c of the main pipes 20 and a cushion bracket 60c provided at the front portion of the swing arm 60. Provided.

  Referring to FIG. 8, the intake system 73 of the engine EB includes a throttle body 74F having a downstream end connected to one side surface of the cylinder heads 30F, 30R of the banks BF, BR between the front and rear banks BF, BR. , 74R, intake pipes 75F, 75R connected to the upstream ends of both throttle bodies 74F, 74R, and the intake pipes 75F, 75R are arranged above the front bank BF so that the intake pipes 75F, 75R are connected in common. Air cleaner 76B, and fuel injection valves 77F and 77R are attached to the throttle bodies 74F and 74R.

  The air cleaner 76 </ b> B is configured by storing a cleaner element 79 in a cleaner case 78. The cleaner case 78 has a bowl-shaped first case member 80 that opens upward, and a second case member 81 that integrally includes a partition wall 81 a that partitions the cleaner case 78 into an upper unpurified chamber 83 and a lower purified chamber 84. And a bowl-shaped third case member 82 that opens downward is joined so that the peripheral portion of the second case member 81 is sandwiched between the peripheral portions of the first and third case members 80 and 82. The cleaner element 79 is detachably attached to the flow hole 85 provided in the partition wall 81a from above, that is, from the unpurified chamber 83 side.

  The intake pipes 75F and 75R are connected to the cleaner case 78 so as to enter the purification chamber 84, and an intake hole 86 communicating with the non-purification chamber 83 is provided on the side of the third case member 82 in the cleaner case 78.

  The cleaner case 78 of the air cleaner 76B is formed with a length in the front-rear direction larger than the length in the vertical direction, and a fuel tank arranged so as to straddle both down pipes 18 above the air cleaner 76B. 90B is mounted and supported on the front portion of the vehicle body frame F, that is, on both down pipes 18.

  Further, the ceiling wall of the cleaner case 78, that is, the ceiling wall 82a of the third case member 82 is formed to extend substantially horizontally in the front-rear direction so as to face the bottom wall 90Ba of the fuel tank 90B, and the partition wall of the second case member 81 81a is also formed to extend substantially horizontally in the front-rear direction.

  A radiator 91 for cooling the engine coolant heated by the water-cooled engine EB is disposed in front of the front bank BF in the engine EB and below the air cleaner 76B. The radiator 91 is disposed on the vehicle body frame F. Are supported by the lower pipe 19. Thus, the radiator 91, the fuel tank 90 </ b> B, and the air cleaner 76 </ b> B are disposed in front of the leg space 135 formed by the vehicle body cover 125.

  In addition, an air guide plate 92 that guides the traveling wind from the front to the radiator 91 side is integrally provided at a lower portion of the cleaner case 78 in the air cleaner 76B, that is, the first case member 80. The case 78 extends from the lower front end portion of the case 78 toward the radiator 91 so as to incline backward.

  As clearly shown in FIG. 9, an element replacement window 136 for replacing the cleaner element 79 housed in the cleaner case 78 is provided at the rear of the second case member 81 in the cleaner case 78 of the air cleaner 76B. The element replacement window 136 is provided facing the under space 135 and is closed by a lid member 137 that can be opened and closed.

  Further, the ceiling wall 82a of the cleaner case 78 is formed so as to extend substantially horizontally in the front-rear direction so as to face the bottom wall 90Ba of the fuel tank 90B, and the cleaner element 79 is also substantially horizontal from the element replacement window 136. It can be pulled out and is arranged in the cleaner case 78 in a substantially horizontal posture facing the ceiling wall 82a. Corresponding to the element replacement window 136, the floor tunnel portion 130 is provided with an opening that allows the lid member 137 to be opened and closed and the cleaner element 79 to be inserted and removed.

  The exhaust system 93 of the engine EB has an exhaust pipe 94 that is connected to the lower side surface of the cylinder head 30F in the front bank BF and extends rearward below the power unit PB, and the rear side surface of the cylinder head 30R in the rear bank BR. An exhaust pipe 95 to which the upstream end is connected, a collective exhaust pipe 96 that is connected in common to the downstream ends of the exhaust pipes 94 and 95, and a collective exhaust pipe 96 that is arranged on the right side of the rear wheel WR. The exhaust muffler 97 is provided.

  The exhaust pipe 94 of the front bank BF is bent in a substantially C shape downward from the cylinder head 30F, extends rearward through the lower side of the power unit PB, and rises toward the right side of the rear wheel WR behind the power unit PB. An accommodation recess 98 for accommodating at least the upper part of the exhaust pipe 94 is provided on the lower surface of the bottom wall 48a of the transmission case 48 constituting a part of the case of the power unit PB.

  Moreover, as shown in FIG. 12, the housing recess 98 is disposed between the crank pulley 34a on the drive pulley 51 side of the crankshaft 34 and the drive pulley 51, and thereby has a relatively large diameter. By avoiding interference with the drive pulley 51, the housing recess 98 can be formed without difficulty in the lower surface of the bottom wall 48a of the transmission case 48.

  Further, the exhaust pipe 95 of the rear bank BR is located behind the main stand shaft 67 and is arranged in parallel with the exhaust pipe 94 of the front bank BF so as to dive from the left side of the crankcase 28 to the rear part of the transmission case 48. It is formed by bending. That is, the exhaust pipe 95 of the rear bank BR extends from the cylinder head 30R to the left side of the crankcase 28 and the transmission case 48, and further penetrates the rear part of the transmission case 48 and behind the main stand shaft 67 to the front bank BF. The exhaust pipe 94 is formed in parallel.

  The collective exhaust pipe 96 is connected in common to the downstream ends of both exhaust pipes 94 and 95 arranged in parallel on the rear side of the power unit PB, and the upstream end of the exhaust muffler 97 is connected to the downstream end of the collective exhaust pipe 96. .

  The head pipe 17 at the front end of the vehicle body frame F is provided with a lock mechanism 101 that can switch between a locked state and an unlocked state of the steering handle 16, and this lock mechanism 101 is the same as in the first embodiment. The steering handle 16 is switched between the locked state and the unlocked state according to the swinging motion of the link member 121 according to the operation of the key cylinder lock 102 arranged at a position separated from the lock mechanism 101.

  A storage box 140 whose upper end opening is closed by a bottom plate 141 of the passenger seat 133 so as to be openable and closable is disposed below the passenger seat 133. A rear cushion 72 is provided on the bottom wall 140a of the storage box 140. A storage recess 142 is provided for storing the axis so that its axis is located above the bottom surface of the bottom wall 140a.

  According to the second embodiment, as in the first embodiment, the space below the main pipe 20 can be made relatively large, the degree of freedom of the shape of the engine EB can be increased, and the middle of the main pipe 20 can be increased. It is also possible to optimize the curved portion 20c of the engine so that the maneuverability can be optimized, and the engine EB is connected to the main pipe 20 at a portion where the rigidity is increased by the connection with the down pipe 18. Thus, the engine EB can be efficiently and reliably supported on the vehicle body frame F.

  Further, the bottom wall 140a of the storage box 140 can be set at a lower position while providing a gap with the rear cushion 72, and a large storage capacity of the storage box 140 can be secured.

  In addition, since the air guide plate 92 that is disposed in front of the engine EB and extends toward the radiator 91 is integrally connected to the cleaner case 78 of the air cleaner 76B, it is possible to reduce the number of components and to allow the traveling wind to flow toward the radiator 91. The radiator 91 can be cooled by guiding effectively.

  In addition, since the undercut space 135 is disposed behind the fuel tank 90B, the air cleaner 76B, and the radiator 91, in the scooter type motorcycle, the volume of the fuel tank 90B and the air cleaner 76B is ensured, and the volume behind the radiator 91 is increased. It is possible to draw out the wind guide effect of the wind guide plate 92 in such a manner that a member having a gap is not disposed.

  Further, the operating force transmission structure between the key cylinder lock 102 and the lock mechanism 101 can be easily configured with a reduced number of parts, and a moderation feeling can be obtained in the operation of the key cylinder lock 102, thereby improving the merchantability. be able to.

  Further, the front bank BF of the V-type engine EB mounted on the vehicle body frame F has a cylinder block 29F and a cylinder head 30F with the cylinder axis inclined forward, and on the right side of the crankcase 28 of the engine EB, A transmission case 48 that houses the continuously variable transmission M that constitutes the power unit PB together with the engine EB is coupled, and an exhaust pipe 94 whose upstream end is connected to the cylinder head 30F of the forwardly inclined cylinder axis passes below the power unit PB. However, an accommodation recess 98 for accommodating at least the upper part of the exhaust pipe 94 is provided on the lower surface of the bottom wall 48 a of the transmission case 48.

  Therefore, it is possible to arrange the exhaust pipe 94 so as to be closer to the power unit PB, thereby ensuring a minimum ground clearance and disposing the engine EB at a lower position, and a scooter type which is a low floor type vehicle. The center of gravity of a motorcycle can be lowered.

  Also, an exhaust pipe 95 connected to the rear side surface of the cylinder head 30R provided in the rear bank BR of the engine EB is disposed at a position corresponding to the rear portion of the power unit PB so as to pivotally support the main stand 68. The rear part of the transmission case 48 is dived from the left side of the crankcase 28 so as to be parallel to the exhaust pipe 94 that is connected to the cylinder head 30F of the front bank BF and passes below the power unit PB, behind the shaft 67. It is formed by bending. According to this, the space for arranging the exhaust pipe 95 to be secured behind the rear bank BR can be secured, and the space behind the rear bank BR can be effectively used for other purposes. Further, since the exhaust pipe 95 can be passed above the lowest part of the engine EB, it is easy to ensure the lowest ground clearance, and the center of gravity of the scooter type motorcycle can be lowered.

  A V-type engine EB is mounted on the vehicle body frame F so as to be supported by the first engine hanger 32... Between the front and rear banks BF, BR, and the rear bank BR is connected to both main pipes 20. Are arranged between the bent portions 20c of the V-type engine so that the front portion of the V-type engine EB and the rear banks BF and BR are supported by a relatively high portion of the main pipe 20 ... The engine EB can be efficiently mounted on the vehicle body frame F.

  An air cleaner 76B constituting a part of the intake system 73 connected to the engine EB mounted on the vehicle body frame F is disposed below the fuel tank 90B, and is housed in the cleaner case 78 of the air cleaner 76B. Since the element replacement window 136 for replacing the cleaner element 79 is provided facing the undercut space 135, when the cleaner element 79 of the air cleaner 76B is replaced, the cleaner element is opened with the element replacement window 136 opened. 79 can be easily exchanged from the side of the foothole space 135.

  Further, the ceiling wall 82a of the cleaner case 78 is formed so as to extend substantially horizontally in the front-rear direction so as to face the bottom wall 90Ba of the fuel tank 90B, and the cleaner element 79 can be pulled out almost horizontally from the element replacement window 136. Since the fuel tank 90B and the air cleaner 76B can be efficiently disposed while sufficiently securing their respective capacities, the fuel tank 90B and the air cleaner 76B are disposed in the cleaner case 78 in a substantially horizontal posture facing the ceiling wall 82a.

  In addition, since the cleaner case 78 of the air cleaner 76B is formed with a length in the front-rear direction larger than the length in the vertical direction, the capacity of the air cleaner 76B can be sufficiently secured and efficiently arranged.

  FIG. 13 is a side view of a scooter type motorcycle according to a third embodiment of the present invention, and FIG. 14 is an enlarged longitudinal side view showing a front portion of the motorcycle, corresponding to the first and second embodiments. Are denoted by the same reference numerals, and detailed description thereof is omitted.

  The vehicle body frame F of the scooter type motorcycle is configured in the same manner as in the first and second embodiments. The vehicle body frame F includes a four-cycle engine EC and a non-transmission engine that shifts the output of the engine EC. A power unit PC comprising a step transmission M is mounted to drive the rear wheels WR. The engine EC is configured, for example, as a water-cooled single cylinder, and includes a crankcase 28, a cylinder block 29 'having a forwardly inclined cylinder axis and extending forward from the crankcase 28, and the crankcase 28. The cylinder head 30 'is coupled to the cylinder block 29' on the opposite side, and the head cover 31 'is coupled to the top of the cylinder head 30'.

  The upper part of the crankcase 28 is supported by first engine hangers 32 provided at the front half inclined portions 20a of the main pipes 20 in the vicinity of the rear ends of the down pipes 18 in the vehicle body frame F. Further, the lower part on the front side of the crankcase 28 is supported by the second engine hanger 33 attached to the engine hanger bracket 19a connected to the lower end of the lower pipe 19. A pair of brackets 66 provided at the rear portion of the transmission case 48 coupled to the crankcase 28 and extending upward are supported by the rear end portion of the main pipe 20. Further, a rear cushion 72 having an axial line extending in the front-rear direction is interposed between a cross pipe 71 installed between the bent portions 20c of the main pipes 20 and a cushion bracket 60c provided at the front portion of the swing arm 60. Provided.

  A downstream end of the throttle body 74 is connected to the upper side surface of the cylinder head 30 ′, and the upstream end of the throttle body 74 is below the fuel tank 90 C disposed so as to straddle both the down pipes 18. An air cleaner 76 </ b> C disposed above the engine EC is connected, and a fuel injection valve 77 is attached to the throttle body 74.

  The air cleaner 76 </ b> C is configured by housing a cleaner element 159 in a cleaner case 158. The cleaner case 158 has a bowl-shaped first case member 160 opened upward, a bowl-like first case member 160 opened downward, a second case member 161 coupled to the first case member 160 from above, and opened forward. A cleaner case 158 includes a bowl-like third case member 162 coupled to the first and second case members 160 and 161 so as to sandwich the cleaner element 159 between the first and second case members 160 and 161. The interior is divided into an unpurified chamber 163 behind the cleaner element 159 and a purified chamber 164 ahead of the cleaner element 159.

  An outside air introduction pipe 165 leading to the unpurified chamber 163 is connected to the upper part of the third case member 162 so as to face the undercut space 135, and a downstream end is connected to the upstream end of the throttle body 74 via the second case member 161. The sucked intake pipe 166 is accommodated in the purification chamber 164.

  A radiator 91 for cooling the engine coolant heated by the water-cooled engine EC is disposed in front of the engine EC, and the radiator 91 is supported by the lower pipes 19 of the vehicle body frame F.

  An upstream end of an exhaust pipe 94 extending rearward is connected to a lower side surface of the cylinder head 30 ′ in the engine EC. The exhaust pipe 94 extends rearward under the power unit PC and is located on the right side of the rear wheel WR behind the power unit PC. And a receiving recess 98 for receiving at least the upper part of the exhaust pipe 94 on the lower surface of the bottom wall 48a of the transmission case 48 constituting a part of the case of the power unit PC. And the downstream end of the exhaust pipe 94 is connected to an exhaust muffler 97 disposed on the right side of the rear wheel WR.

  The head pipe 17 at the front end of the vehicle body frame F is provided with a lock mechanism 101 that can switch between a locked state and an unlocked state of the steering handle 16, and this lock mechanism 101 is the same as in the first and second embodiments. Thus, the lock state and the unlock state of the steering handle 16 are switched according to the swinging motion of the link member 121 according to the operation of the key cylinder lock 102 disposed at a position separated from the lock mechanism 101.

  A storage box 140 whose upper end opening is closed by a bottom plate 141 of the passenger seat 133 so as to be openable and closable is disposed below the passenger seat 133. A rear cushion 72 is provided on the bottom wall 140a of the storage box 140. A storage recess 142 is provided for storing the axis so that its axis is located above the bottom surface of the bottom wall 140a.

  According to the third embodiment, as in the first and second embodiments, the space below the main pipe 20 can be made relatively large, the degree of freedom of the shape of the engine EC can be increased, and the main pipe can be increased. Since the middle curved portion 20c can be made relatively large, the maneuverability can be optimized, and the main pipe 20 can be optimized at the portion where the rigidity is increased by the connection with the down pipe 18. Thus, the engine EC can be supported on the vehicle body frame F efficiently and reliably.

  Further, the bottom wall 140a of the storage box 140 can be set at a lower position while providing a gap between the rear cushion 72 and the storage box 140 can have a large capacity. The volume on both sides can be increased, and the jet-type helmet 143 can be effectively stored in the storage box 140.

  FIG. 15 shows a fourth embodiment of the present invention, and parts corresponding to the first to third embodiments are given the same reference numerals.

  The vehicle body frame F of the scooter type motorcycle is configured in the same manner as in the first to third embodiments, and the vehicle body frame F shifts the engine EC having four cycles and the output of the engine EC. A power unit PC comprising a continuously variable transmission M is mounted to drive the rear wheels WR. Further, an axis extending in the front-rear direction is provided between the cross pipe 71 laid between the bent portions 20 c of the main pipes 20 in the body frame F and the cushion bracket 60 c provided in the front portion of the swing arm 60. A rear cushion 72 is provided.

  Below the riding seat 133, a fuel tank 180, which is a storage member whose upper end opening is closed so as to be openable and closable by a bottom plate 141 of the riding seat 133, is disposed. On the bottom wall 180a of the fuel tank 180, An accommodation recess 181 is provided for accommodating the rear cushion 72 such that the axis thereof is located above the lower surface of the bottom wall 180a.

  In addition, a storage box 181 smaller than the storage box 140 of the first to third embodiments is disposed behind the fuel tank 180 so that the upper end opening can be closed by the bottom plate 141 of the riding seat 133. A storage box 182 that can store the jet helmet 143 is disposed obliquely in front of the air cleaner 76C.

  According to the fourth embodiment, the bottom wall 180a of the fuel tank 180 can be set at a lower position while providing a gap between the rear cushion 72 and the fuel storage capacity of the fuel tank 180 can be ensured to be large. Is possible.

  The configuration of the fourth embodiment can also be applied to a scooter type motorcycle on which a V-type engine is mounted.

  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. It is.

1 is a side view of a scooter type motorcycle according to a first embodiment. FIG. 2 is a longitudinal side view showing an enlarged front portion of the scooter type motorcycle. It is a front view of an engine. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 1 is an enlarged side view of a rear part of a scooter type motorcycle. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a side view of the scooter type motorcycle of the second embodiment. FIG. 2 is a longitudinal side view showing an enlarged front portion of the scooter type motorcycle. It is a top view of a power unit in the state where an intake system was omitted. FIG. 10 is a view taken in the direction of arrow 10 in FIG. 9. FIG. 11 is a view taken in the direction of arrow 11 in FIG. 9. FIG. 12 is a sectional view taken along line 12-12 of FIG. It is a side view of the scooter type motorcycle of a 3rd example. FIG. 2 is a longitudinal side view showing an enlarged front portion of the scooter type motorcycle. It is a side view of the scooter type motorcycle of the fourth embodiment.

Explanation of symbols

60 ... Swing arm 72 ... Rear cushion 133 ... Riding seat 140 ... Storage box 140a, 180a as storage member ... Bottom walls 142, 181 ... Storage recess 143 ... Helmet 144 ... Visor 180 ... Fuel tank F as storage member ... Body frame WR ... Rear wheel

Claims (5)

  A rear wheel (WR) is pivotally supported on the rear part of the swing arm (60) supported so as to be swingable up and down by the body frame (F), and a rear cushion (between the swing arm (60) and the body frame (F)). 72), in which the storage member (140, 180) is disposed below the riding seat (133) on which the vehicle driver sits and above the rear cushion (72), the storage member (140 , 180) on the lower surface of the bottom wall (140a, 180a), the storage recess (72) for storing the rear cushion (72) with its central axis positioned above the lower surface of the bottom wall (140a, 180a). 142, 181) is provided.   The low-floor type vehicle according to claim 1, wherein the storage member is a storage box (140) for storing a helmet or the like.   The low floor vehicle according to claim 1, wherein the storage member is a fuel tank (180) for storing fuel.   The rear cushion (72) has an axis extending in the front-rear direction and is provided between the swing arm (60) and the vehicle body frame (F), and a central portion in the width direction of the bottom wall (140a) of the storage box (140). The low floor vehicle according to claim 2, wherein the storage recess (142) is provided in a vehicle.   The said storage recessed part (142) is formed so that a jet-type helmet (143) can be stored in the said storage box (140) in the state in which the visor (144) was raised. The low-floor type vehicle described.

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