WO2022209101A1 - Straddle-type vehicle - Google Patents

Straddle-type vehicle Download PDF

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Publication number
WO2022209101A1
WO2022209101A1 PCT/JP2021/048969 JP2021048969W WO2022209101A1 WO 2022209101 A1 WO2022209101 A1 WO 2022209101A1 JP 2021048969 W JP2021048969 W JP 2021048969W WO 2022209101 A1 WO2022209101 A1 WO 2022209101A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
wall
fuel tank
frame
engaging
Prior art date
Application number
PCT/JP2021/048969
Other languages
French (fr)
Japanese (ja)
Inventor
良行 佐藤
康平 山本
洋平 作間
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2023510272A priority Critical patent/JP7440706B2/en
Publication of WO2022209101A1 publication Critical patent/WO2022209101A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J35/00—Fuel tanks specially adapted for motorcycles or engine-assisted cycles; Arrangements thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
    • B62K11/02—Frames
    • B62K11/04—Frames characterised by the engine being between front and rear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
    • B62K11/02—Frames
    • B62K11/04—Frames characterised by the engine being between front and rear wheels
    • B62K11/06—Frames characterised by the engine being between front and rear wheels the frame being of single-beam type

Definitions

  • the present invention relates to a saddle-ride type vehicle.
  • a straddle-type vehicle that includes a vehicle body frame that includes an engaging portion and a fuel tank that is engaged and supported by the engaging portion (see Patent Document 1, for example).
  • the fuel tank engages with an engaging portion provided on the outer surface of the vehicle body frame and is exposed to the outside of the vehicle body.
  • An object of the present invention is to facilitate assembly of a fuel tank to a vehicle body frame in a saddle type vehicle.
  • a saddle-ride type vehicle is a saddle-ride type vehicle including a body frame having an engaging portion and a fuel tank supported by being engaged with the engaging portion, wherein the body frame extends the fuel tank in a vehicle width direction.
  • a pair of left and right frame side wall portions that cover the fuel tank from the outside, and a frame wall portion that covers the fuel tank from one of the vehicle front side and the vehicle rear side.
  • the portion When viewed from the side of the vehicle, the portion includes an upper wall extending in the longitudinal direction of the vehicle, a lower wall facing the upper wall, and a vertical wall extending in the vertical direction of the vehicle on the other side opposite to the one in the longitudinal direction of the vehicle. and an open portion that opens toward the frame wall portion on the one side, the fuel tank is provided with a protruding portion that engages in the engaging portion from the open portion, and the lower wall has the The one-side end extends further to the one side than the one-side end of the upper wall, and the distance in the vehicle front-rear direction between the one-side end of the lower wall and the frame wall portion is smaller than the width of the projecting portion in the longitudinal direction of the vehicle.
  • the fuel tank can be easily assembled to the body frame.
  • FIG. 1 is a left side view of a motorcycle according to an embodiment of the invention.
  • FIG. 2 is a left side view of the vehicle body frame.
  • FIG. 3 is a plan view of the vehicle body frame viewed from above.
  • FIG. 4 is a perspective view of the vehicle body frame viewed from the lower left side.
  • FIG. 5 is a cross-sectional view of the motorcycle cut at the center in the vehicle width direction.
  • FIG. 6 is a cross-sectional view showing the arrangement of parts inside the rear internal space.
  • 7 is an enlarged cross-sectional view of the attachment structure of the rear portion of the fuel tank in FIG. 6.
  • FR indicates the front of the vehicle body
  • UP indicates the upper side of the vehicle body
  • LH indicates the left side of the vehicle body.
  • FIG. 1 is a left side view of a motorcycle 1 according to an embodiment of the invention.
  • the motorcycle 1 includes a body frame 10, an engine 11 supported by the body frame 10, a front fork 12 supporting a front wheel 2 in a steerable manner, a swing arm 13 supporting a rear wheel 3, and a seat 14 for an occupant. and a vehicle.
  • the motorcycle 1 is a saddle-riding type vehicle in which a rider straddles a seat 14 and sits thereon.
  • the seat 14 is provided above the rear portion of the vehicle body frame 10 .
  • FIG. 1 and 2 is a left side view of the body frame 10.
  • the body frame 10 includes a head pipe 15 provided at the front end of the body frame 10, a main frame 16 extending rearward from the head pipe 15 to the rear portion of the motorcycle 1, and a main frame 16. a pivot frame 17 extending downwardly from the rear of the .
  • the main frame 16 includes a hollow main tube 18 extending rearward from the head pipe 15 and a seat frame portion 19 extending rearward from the rear end of the main tube 18 .
  • the seat frame portion 19 has a vertical length greater than that of the main tube 18 and bulges downward with respect to the main tube 18 .
  • the pivot frame 17 extends downward from the lower end of the seat frame portion 19 .
  • the seat 14 is supported by the seat frame portion 19 .
  • the seat 14 covers the upper surface of the seat frame portion 19 from above.
  • the front fork 12 is supported so as to be steerable left and right via a steering shaft (not shown) inserted through the head pipe 15 .
  • the front wheel 2 is supported by an axle 2 a provided at the lower end of the front fork 12 .
  • a steering handle 21 is attached to the upper end of the front fork 12 .
  • the swing arm 13 is supported by a pivot shaft 22 supported by the pivot frame 17 .
  • the pivot shaft 22 is a shaft extending horizontally in the vehicle width direction (horizontal direction).
  • a pivot shaft 22 is inserted through the front end of the swing arm 13 .
  • the swing arm 13 swings up and down around the pivot shaft 22 .
  • the rear wheel 3 is supported by an axle 3 a provided at the rear end of the swing arm 13 .
  • a pair of left and right reactions 23 are spanned between the rear portion of the swing arm 13 and the rear portion of the seat frame portion 19 .
  • the engine 11 is arranged below the main frame 16 behind the front wheels 2 and in front of the pivot frame 17 .
  • the engine 11 is an internal combustion engine that includes a crankcase 31 that houses a crankshaft 30 that extends in the vehicle width direction, and a cylinder portion 32 that extends forward from the front surface of the crankcase 31 .
  • the engine 11 is a horizontal engine in which the axis 32a of the cylinder portion 32 extends substantially horizontally in the vehicle front-rear direction when viewed from the side of the vehicle.
  • a piston (not shown) connected to the crankshaft 30 reciprocates back and forth within the cylinder portion 32 along an axis 32a.
  • a transmission (not shown) that decelerates and outputs the rotation of the crankshaft 30 is housed in the rear portion of the crankcase 31 .
  • the output shaft of this transmission and the rear wheels 3 are connected by a drive chain 33 .
  • An exhaust pipe 35 of the engine 11 extends rearward from an exhaust port provided on the lower surface of the cylinder portion 32 .
  • a muffler 36 is connected to the rear end of the exhaust pipe 35 .
  • An intake device 37 that supplies intake air to the engine 11 includes an air cleaner 38 , a throttle device 39 connected to the cylinder portion 32 , and a connecting tube 40 that connects the air cleaner 38 and the throttle device 39 .
  • a fuel tank 41 is arranged below the air cleaner 38 .
  • a battery 42 that supplies electric power to each part of the motorcycle 1 is supported by the air cleaner 38 .
  • a step 43 on which an occupant puts his/her foot is supported by the pivot frame 17 via a step holder 44 .
  • a storage box 45 capable of storing parts and articles is attached to the outer surface of the seat frame portion 19 .
  • the headlight 46 is arranged in front of the head pipe 15 .
  • the front fender 47 is attached to the front fork 12 .
  • a rear fender 48 that covers the rear wheel 3 from above is attached to the seat frame portion 19 .
  • FIG. 3 is a plan view of the vehicle body frame 10 viewed from above.
  • FIG. 4 is a perspective view of the vehicle body frame 10 viewed from the lower left side. 2 to 4, the main frame 16 is formed into a hollow case shape by joining a plurality of plate members (divided bodies) by welding.
  • the main frame 16 includes a left member 51 forming the left side surface of the main frame 16 and a right member 52 forming the right side surface of the main frame 16 .
  • the left member 51 and the right member 52 are plate members extending in the vertical direction and the front-rear direction, and are arranged with the plate thickness direction directed in the vehicle width direction when viewed as a whole.
  • the left member 51 and the right member 52 are plate members longer in the front-rear direction than in the up-down direction, and constitute the main tube 18 and the seat frame portion 19 .
  • the left member 51 and the right member 52 are provided substantially symmetrically.
  • the main frame 16 also includes a lower member 53 forming the lower surface of the main frame 16 and a rear member 54 forming the rear surface of the main frame 16 .
  • the lower member 53 is a plate member arranged with its plate thickness direction oriented in the vertical direction.
  • the lower member 53 includes a first lower member 55 forming the lower surface of the main tube 18 of the main frame 16 and a second lower member 55 forming the lower surface of the seat frame portion 19 of the main frame 16 . and a side member 56 .
  • the main tube 18 of the main frame 16 joins the upper portion of the left member 51 and the upper portion of the right member 52 to each other, and the lower portion of the left member 51 and the lower portion of the right member 52 are connected by a first lower member 55 in the vehicle width direction. By connecting to , it is formed in a tube shape extending back and forth. The front end opening of the main tube 18 is closed by the rear surface of the head pipe 15 .
  • the seat frame portion 19 of the main frame 16 connects the lower edge portion of the rear portion of the left member 51 and the lower edge portion of the rear portion of the right member 52 with a second lower member 56 in the vehicle width direction.
  • a hollow case shape is formed by connecting the rear end portion and the rear end portion of the right side member 52 with the rear side member 54 in the vehicle width direction.
  • the lower edge portion of the rear portion of the left member 51, the lower edge portion of the rear portion of the right member 52, and the second lower member 56 are inclined rearwardly upward.
  • the opening 57 is provided with an opening 57 that opens upward.
  • the opening 57 extends longer in the vehicle front-rear direction than in the vehicle width direction in plan view.
  • the opening 57 is provided by cutting the upper portion of the left member 51 and the upper portion of the right member 52 .
  • a rear internal space 58 surrounded by the left member 51, the right member 52, the second lower member 56, and the rear member 54 is formed inside the seat frame portion 19, a rear internal space 58 surrounded by the left member 51, the right member 52, the second lower member 56, and the rear member 54 is formed.
  • the rear internal space 58 is exposed upward from the opening 57 .
  • the left member 51 and the right member 52 are side walls that define the rear internal space 58 in the vehicle width direction.
  • the second lower member 56 is a lower wall that covers the rear internal space 58 from below and from behind.
  • the rear member 54 is a plate member integrally including a rear wall portion 54a that forms the rear surface of the seat frame portion 19 and an upper wall portion 54b that forms the upper surface of the rear end portion of the seat frame portion 19. As shown in FIG.
  • the rear wall portion 54a connects the rear edge portion of the left member 51 and the rear edge portion of the right member 52 in the vehicle width direction.
  • the upper wall portion 54b connects the upper edge of the rear end portion of the left member 51 and the upper edge of the rear end portion of the right member 52 in the vehicle width direction.
  • the opening 57 is positioned in front of the upper wall portion 54b.
  • An engine hanger portion 60 extending downward from the rear end portion of the main tube 18 is provided at the front end portion of the seat frame portion 19 .
  • the engine hanger portion 60 is provided at a lower front end portion of the left member 51 and a lower front end portion of the right member 52, respectively.
  • An upper portion of the crankcase 31 (Fig. 1) is fastened to the engine hanger portion 60 by an engine fixing bolt 65a (Fig. 1) extending in the vehicle width direction.
  • the first lower member 55 integrally includes a lower wall portion 61 forming the lower surface portion of the main tube 18 and a front wall portion 62 extending downward from the rear end of the lower wall portion 61 .
  • the front wall portion 62 is a wall portion facing the vehicle front side, and connects the front edges of the left and right engine hanger portions 60 to each other in the vehicle width direction.
  • the front wall portion 62 is provided with an outside air intake port 63 that penetrates the front wall portion 62 in the vehicle front-rear direction.
  • the outside air intake port 63 is an opening provided by cutting the front wall portion 62 upward from the lower edge of the front wall portion 62 .
  • the outside air intake 63 opens toward the front of the vehicle.
  • a portion of the lower surface of the seat frame portion 19 between the front wall portion 62 and the second lower member 56 in the longitudinal direction of the vehicle is an open portion 64 that opens downward.
  • the open portion 64 exposes the rear internal space 58 downward.
  • the pivot frame 17 is positioned forward of the second lower member 56 .
  • the pivot frame 17 includes a pair of left and right side wall portions 17a and 17b, and a wall portion 17c connecting rear edges of the side wall portions 17a and 17b in the vehicle width direction.
  • the upper edge 17d of the left side wall portion 17a of the pivot frame 17 is joined to the lower edge of the left side member 51 of the seat frame portion 19, and the upper edge of the right side wall portion 17b is joined to the right side member 52 of the seat frame portion 19. Joined to the lower edge.
  • the wall portion 17c is inclined rearwardly upward as viewed from the side of the vehicle.
  • a second lower member 56 forming the lower surface of the seat frame portion 19 extends rearwardly upward continuously from the upper end of the wall portion 17c. In plan view, the wall portion 17c covers the rear portion of the open portion 64 from below.
  • FIG. 5 is a cross-sectional view of the motorcycle 1 cut at the center in the vehicle width direction.
  • FIG. 6 is a cross-sectional view showing the arrangement of components inside the rear internal space 58. As shown in FIG. In FIG. 6, a cross section at a position closer to the left than in FIG. 5 is shown. 5 and 6, the air cleaner 38, the fuel tank 41, and the battery 42 are accommodated in the rear internal space 58 inside the seat frame portion 19 and positioned below the opening 57.
  • the seat 14 is provided so as to be rotatable (openable and closable) up and down around a hinge (not shown) at the front end of the seat 14 .
  • the motorcycle 1 has an opening cover 59 below the seat 14 that closes substantially the entire opening 57 .
  • the fuel tank 41 is a hollow container elongated in the longitudinal direction of the vehicle.
  • the fuel tank 41 is arranged in the rear internal space 58 above the pivot frame 17 , behind the outside air intake 63 and in front of the rear member 54 .
  • the fuel tank 41 is supported by the seat frame portion 19 .
  • the fuel tank 41 is arranged in a forward-downward (rearward-up) posture above and rearwardly of the crankcase 31 of the engine 11 when viewed from the side of the vehicle. Therefore, the front end portion 41a of the fuel tank 41 is positioned below the rear end portion 41b of the fuel tank 41 when viewed from the side of the vehicle.
  • the fuel in the fuel tank 41 decreases, the fuel in the fuel tank 41 gathers on the side of the front end portion 41a which is closer to the engine 11 and located at a lower position. Therefore, the mass of the motorcycle 1 can be concentrated, and the center of gravity of the motorcycle can be lowered.
  • the fuel tank 41 is disposed in the rear internal space 58 so that the lower surface 41k of the fuel tank 41 is along the second lower member 56 and is inclined rearwardly upward.
  • the second lower member 56 covers the rear wheel 3 from above.
  • the second lower member 56 is inclined forward and downward along the upper surface of the front portion of the rear wheel 3 .
  • the upper surface portion 41c of the fuel tank 41 is inclined forward and downward when viewed from the side of the vehicle.
  • a fuel filler port 41d is provided at the rear portion of the upper surface portion 41c.
  • the fuel filler port 41d is a tubular portion protruding upward from the upper surface portion 41c.
  • An upper end opening of the fuel filler port 41d is closed with a cap 41e.
  • a fuel pump 76 is attached to the front portion of the upper surface portion 41c.
  • the fuel pump 76 supplies the fuel in the fuel tank 41 to the cylinder portion 32 through the fuel hose 75 .
  • a front end portion 41a of the fuel tank 41 is positioned above the rear portion of the crankcase 31 and covers the upper surface 31d of the rear portion of the crankcase 31 from above.
  • the upper surface 31d is an inclined surface that slopes forward and upward when viewed from the side of the vehicle.
  • the fuel tank 41 extends rearward from the vicinity of the upper surface 31 d of the rear portion of the crankcase 31 in a rear
  • the air cleaner 38 includes a box-shaped air cleaner case 70 and a filter 71 arranged inside the air cleaner case 70 .
  • An intake duct 73 is connected to the air cleaner case 70 .
  • the air cleaner 38 is arranged adjacent to the fuel tank 41 and above the front of the fuel tank 41 .
  • the air cleaner 38 is arranged in a forward-downward posture when viewed from the side of the vehicle. Therefore, the front end portion 38a of the air cleaner 38 is located below the rear end portion 38b of the air cleaner 38 when viewed from the side of the vehicle. More specifically, the air cleaner 38 is arranged in a downwardly forward posture so that the lower surface portion 38c of the air cleaner 38 is aligned with the upper surface portion 41c of the fuel tank 41 when viewed from the side of the vehicle.
  • a connecting tube 40 extending forward from the front surface of the air cleaner case 70 extends forward from the rear internal space 58 through the outside air intake port 63 of the vehicle body frame 10 and is connected to the throttle device 39 .
  • the connecting tube 40 extends forward above the engine 11 along the upper surface of the crankcase 31 and the upper surface of the cylinder portion 32 and is connected to the throttle device 39 .
  • Outside air flows into the rear internal space 58 from the outside air intake port 63 . Outside air that has flowed into the rear internal space 58 is sucked into the air cleaner case 70 through the intake duct 73 and passes through the filter 71 . Outside air purified by the filter 71 flows through the connecting tube 40 to the throttle device 39 .
  • a battery storage section 74 for storing the battery 42 is provided on the top surface of the front portion of the air cleaner 38 .
  • the battery housing portion 74 is a concave portion in which the upper surface portion of the front portion of the air cleaner 38 is recessed downward with respect to the upper surface portion of the rear portion of the air cleaner 38 .
  • FIG. 7 is an enlarged cross-sectional view of the attachment structure of the rear portion of the fuel tank 41 in FIG.
  • the fuel tank 41 is formed in the shape of a hollow container by joining an upper half body 41g and a lower half body 41h divided into upper and lower parts with a flange portion 41i.
  • the flange portion 41i has a plate shape extending rearward and upward from the rear surface of the fuel tank 41 at the rear end portion 41b of the fuel tank 41 .
  • a cylindrical elastic member 41j is attached to the flange portion 41i.
  • a pair of left and right elastic members 41j are provided on the flange portion 41i.
  • the elastic member 41j is an elastomer such as rubber, for example.
  • the seat frame portion 19 includes a sub-frame 19 a that connects the left member 51 and the right member 52 in the vehicle width direction within the rear internal space 58 .
  • the sub-frame 19a is rod-shaped and extends in the vehicle width direction.
  • a tank stay 19b to which the fuel tank 41 is attached is provided on the upper surface of the sub-frame 19a.
  • the upper surface of the tank stay 19b is inclined forward and downward along the flange portion 41i.
  • the rear portion of the fuel tank 41 is fastened to the tank stay 19b by a tank fastener 77 that is inserted through the elastic member 41j and the flange portion 41i from above.
  • the flange portion 41i contacts the upper surface of the tank stay 19b via an elastic member 41j.
  • the tank fastener 77 is, for example, a bolt.
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8.
  • the stay 80 is a plate-like portion extending downward from the left and right side portions of the lower portion of the fuel tank 41 .
  • the stay 80 is arranged with its plate thickness direction oriented in the vehicle width direction.
  • the connection member 81 is rod-shaped and extends in the vehicle width direction below the lower surface 41k of the fuel tank 41 . Both ends of the connection member 81 in the vehicle width direction are shafts 81a that penetrate the stay 80 and protrude in the vehicle width direction.
  • the rigidity of the left and right stays 80 is increased by the connecting member 81 .
  • the fuel tank 41 has a protrusion 82 that protrudes outward in the vehicle width direction from the stay 80 .
  • the projecting portion 82 includes a shaft 81a and a pair of right and left engaging members 83 supported by the shaft 81a.
  • the engagement member 83 is a cylindrical tubular member extending in the vehicle width direction.
  • the engaging member 83 is attached to the shaft 81a by fitting the hole 83a in the center of the cylinder to the shaft 81a.
  • the engaging member 83 is rotatable around the shaft 81a.
  • the engaging member 83 is made of elastomer such as rubber. The engaging member 83 abuts against the outer surface of the stay 80 in the vehicle width direction.
  • the tip of the shaft 81a is located inside the hole 83a in the axial direction.
  • the projecting portion 82 is provided at the front portion of the fuel tank 41 .
  • the projecting portion 82 is located below the lower surface 41k.
  • the protrusions 82 are provided on the left and right stays 80 respectively.
  • the projecting portion 82 is positioned on the outer surface of the fuel tank 41 in the vehicle width direction.
  • the frame wall portion 66 is inclined forward and downward when viewed from the side of the vehicle.
  • the frame wall portion 66 is inclined forward and downward along the upper surface of the front portion of the rear wheel 3 .
  • the frame wall portion 66 covers the fuel tank 41 from the vehicle rear side, which is one of the vehicle front side and the vehicle rear side. That is, the vehicle rear side is one of the vehicle front-rear directions, and the vehicle front side is the other of the vehicle front-rear directions.
  • the vehicle front side is the opposite side of the vehicle rear side.
  • the left side member 51 and the side wall portion 17a of the pivot frame 17 form a frame side wall portion 67 that covers the fuel tank 41 from the outside in the vehicle width direction on the left side.
  • the right side member 52 and the side wall portion 17b of the pivot frame 17 constitute a frame side wall portion 68 that covers the fuel tank 41 from the outside in the vehicle width direction on the right side.
  • the seat frame portion 19 has a pair of left and right engaging portions 85 with which the projecting portion 82 of the fuel tank 41 engages.
  • the engaging portion 85 is provided in front of the frame wall portion 66 inside the seat frame portion 19 .
  • the engaging portions 85 are provided on the inner surface of the frame side wall portion 67 and the inner surface of the frame side wall portion 68, respectively.
  • the engaging portion 85 includes an upper wall 86 extending in the vehicle front-rear direction in a vehicle side view, a lower wall 87 facing the upper wall 86 below the upper wall 86 , and a vehicle up-down direction on the vehicle front side of the engaging portion 85 . and an opening portion 89 opening toward the frame wall portion 66 on the vehicle rear side of the engaging portion 85 .
  • the lower wall 87 extends in the vehicle front-rear direction.
  • the upper wall 86, the lower wall 87, and the vertical wall 88 are formed in a substantially U-shape opening rearward by connecting the upper wall 86, the lower wall 87, and the vertical wall 88 in a side view of the vehicle.
  • the substantially U-shape means that the engaging portion 85 as a whole is substantially U-shaped even if notches are provided in a part of the upper wall 86, the lower wall 87, and the vertical wall 88, for example. Also includes
  • the engaging portion 85 also includes a side wall 90 that connects the outer end of the upper wall 86 in the vehicle width direction, the outer end of the lower wall 87 in the vehicle width direction, and the outer end of the vertical wall 88 in the vehicle width direction. .
  • the upper wall 86, the lower wall 87, and the vertical wall 88 are rib-shaped extending inward from the side wall 90 in the vehicle width direction.
  • a side wall 90 closes the end surface of the engaging portion 85 on the outer side in the vehicle width direction.
  • the inner end face in the vehicle width direction of the engaging portion 85 is open.
  • the engaging portion 85 is formed, for example, by bending an upper wall 86 , a lower wall 87 , and a vertical wall 88 from a sheet of plate material forming the side wall 90 .
  • the left engaging portion 85 is fixed to the frame side wall portion 67 by joining the side wall 90 to the inner surface of the frame side wall portion 67 .
  • the right engaging portion 85 is fixed to the frame side wall portion 68 by joining the side wall 90 to the inner surface of the frame side wall portion 68 .
  • the upper wall 86 and the lower wall 87 extend substantially horizontally in the front-rear direction in parallel with each other when viewed from the side of the vehicle.
  • An end portion 87a of the lower wall 87 on the vehicle rear side is inclined upward toward the vehicle rear side as viewed from the side of the vehicle.
  • the end portion 87a is spaced forward from the frame wall portion 66 .
  • the rearwardly rising inclination of the end portion 87a is substantially the same as the inclination of the frame wall portion 66, and the end portion 87a and the frame wall portion 66 are substantially parallel.
  • An end portion 86a of the upper wall 86 on the vehicle rear side (an end portion on one side of the upper wall) is inclined upward toward the vehicle rear side as viewed from the side of the vehicle.
  • the rearwardly upward inclination of the end portion 86a is smaller than the inclination of the end portion 87a.
  • a vehicle rear side end 87b of the lower wall 87 extends further to the vehicle rear side than a vehicle rear side end 86b of the upper wall 86 (one side end of the upper wall). do.
  • the end 87b is the rear end of the lower wall 87.
  • the end 86b is the rear end of the top wall 86.
  • the open portion 89 is an opening defined by an end 87b of the lower wall 87 and an end 86b of the upper wall 86 . Since the end 86b of the upper wall 86 is positioned forwardly above the end 87b of the lower wall 87, the open portion 89 opens rearwardly upward.
  • the vertical wall 88 extends in the vehicle vertical direction between the upper wall 86 and the lower wall 87 .
  • the vertical wall 88 vertically connects the front end of the upper wall 86 and the front end of the lower wall 87 .
  • the front end of the upper wall 86 is the end of the upper wall 86 on the front side of the vehicle
  • the front end of the lower wall 87 is the end of the lower wall 87 on the front side of the vehicle.
  • the vertical wall 88 is formed in an arc shape along the outer periphery of the engaging member 83 of the projecting portion 82 when viewed from the side of the vehicle.
  • the distance L1 in the vehicle front-rear direction between the vehicle rear side end 87b of the lower wall 87 and the second lower member 56 is smaller than the width L2 of the projecting portion 82 in the vehicle front-rear direction.
  • the width L2 is the width of the engagement member 83 in the vehicle front-rear direction.
  • the fuel tank 41 is put into the rear internal space 58 through the opening 57 on the upper surface of the seat frame portion 19 .
  • the fuel tank 41 is lowered forward and downward so that the front portion of the fuel tank 41 is aligned with the frame wall portion 66 .
  • the left and right projecting portions 82 enter the left and right engaging portions 85 through the open portion 89 , and the projecting portions 82 are engaged with the engaging portions 85 .
  • the engagement member 83 is sandwiched between the upper wall 86 and the lower wall 87, and the engagement member 82 is engaged.
  • the member 83 hits the vertical wall 88 from behind.
  • the front portion of the fuel tank 41 is fixed to the frame side wall portion 67 and the frame side wall portion 68 via the engaging portion 85 .
  • the rear portion of the fuel tank 41 is fastened to the tank stay 19b of the seat frame portion 19 by the tank fastener 77 (FIG. 7).
  • the projecting portion 82 Since the distance L1 in the vehicle front-rear direction between the end 87b and the frame wall portion 66 is smaller than the width L2 of the projecting portion 82 in the vehicle front-rear direction, the projecting portion 82 is positioned so that the end 87b and the second end 87b do not move when the fuel tank 41 is lowered forward and downward. is prevented from falling between the lower member 56 of the Therefore, the projecting portion 82 can be easily engaged with the engaging portion 85 .
  • the projecting portion 82 can be easily engaged with the engaging portion 85 by moving the fuel tank 41 forward and downward along the frame wall portion 66 . can. Since the engaging member 83 of the protruding portion 82 is rotatable around the shaft 81 a , the engaging member 83 is rolled against the frame wall portion 66 and the lower wall 87 so as to move the engaging member 83 to the engaging portion 85 . can be engaged. Therefore, the engaging member 83 can be easily engaged with the engaging portion 85 .
  • the protruding portion 82 is located below the lower surface 41 k directly above the protruding portion 82 . This makes it difficult for the fuel tank 41 to hit the frame wall portion 66 when the fuel tank 41 is moved forward and downward. Therefore, the engaging member 83 can be easily engaged with the engaging portion 85 .
  • the engaging member 83 can be moved forward and downward along the end portion 87a.
  • An end portion 86a which is the rear end portion of the upper wall 86, is slanted rearwardly upward (frontwardly downward).
  • the opening portion 89 is widened in the vertical direction, so that the engaging member 83 can be easily engaged with the engaging portion 85 from the opening portion 89 .
  • the engaging member 83 can be guided forward and downward along the end portion 86a. Therefore, it is easy to engage the engaging member 83 with the engaging portion 85 .
  • the motorcycle 1 includes the vehicle body frame 10 having the engaging portion 85 and the fuel tank 41 supported by being engaged with the engaging portion 85.
  • the body frame 10 includes a pair of left and right frame side wall portions 67 and 68 that cover the fuel tank 41 from outside in the vehicle width direction, and a frame wall portion 66 that covers the fuel tank 41 from one of the vehicle front side and the vehicle rear side, that is, the vehicle rear side.
  • the engaging portion 85 is provided on the inner surfaces of the frame side walls 67 and 68.
  • the engaging portion 85 includes an upper wall 86 extending in the longitudinal direction of the vehicle, a lower wall 87 facing the upper wall 86, and a lower wall 87 facing the upper wall 86.
  • a vertical wall 88 that vertically connects an upper wall 86 and a lower wall 87 on the other side (vehicle front side) opposite to one side in the vehicle front-rear direction, and opens toward the frame wall portion 66 on one side.
  • the fuel tank 41 is provided with a projecting portion 82 that engages from the opening portion 89 into the engaging portion 85 , and one end 87 b of the lower wall 87 is connected to the other end of the upper wall 86 .
  • the distance L1 in the vehicle front-rear direction between the one-side end 87b of the lower wall 87 and the frame wall portion 66 is greater than the width L2 of the projecting portion 82 in the vehicle front-rear direction. is also small.
  • the projecting portion 82 of the fuel tank 41 can enter between the frame wall portion 66 and one end 87b of the lower wall 87 of the engaging portion 85 due to the relationship between the distance L1 and the width L2. Therefore, the projecting portion 82 can be easily engaged with the engaging portion 85 from the opening portion 89 .
  • the one-side end 87b of the lower wall 87 extends further to one side than the one-side end 86b of the upper wall 86, the upper wall 86 is less likely to interfere with the projecting portion 82.
  • FIG. therefore, even in a structure in which the fuel tank 41 is arranged inside the vehicle body frame 10 , the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
  • the frame wall portion 66 is inclined so as to be positioned upward toward one side, or the rear side of the vehicle, as viewed from the side of the vehicle. According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided toward the engaging portion 85 by the inclined frame wall portion 66 . Therefore, the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
  • An end portion 87a on one side of the lower wall 87 is inclined upward toward one side. According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided into the engaging portion 85 by the end portion 87 a of the inclined lower wall 87 .
  • one end portion 86a of the upper wall 86 is inclined upward toward the one side. According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided into the engaging portion 85 by the end portion 86 a of the inclined upper wall 86 . In addition, since the distance between the end portion 86 a on one side of the upper wall 86 and the lower wall 87 is widened, the projecting portion 82 can be easily engaged with the engaging portion 85 .
  • the projecting portion 82 includes a shaft 81a extending in the vehicle width direction and an engaging member 83 rotatably supported by the shaft 81a. According to this configuration, the engaging member 83 rotates around the shaft 81 a extending in the vehicle width direction, so that the engaging member 83 can be easily engaged with the engaging portion 85 .
  • the fuel tank 41 is arranged in a forward-downward posture when viewed from the side of the vehicle behind the engine 11 to which the fuel of the fuel tank 41 is supplied, and the frame wall portion 66 is positioned above the rear wheel 3 when viewed from the side of the vehicle. , one of which is the rear of the vehicle, and the projecting portion 82 is provided in the front portion of the fuel tank 41 .
  • the fuel tank 41 can be arranged in a compact manner along the frame wall portion 66 that is arranged above the rear wheel 3 and downwardly forward.
  • the fuel tank 41 is in a forward-downward posture, the fuel is accumulated on the engine 11 side in the front part of the fuel tank 41 , so mass concentration of the motorcycle 1 can be achieved.
  • the fuel tank 41 when the fuel tank 41 is lowered along the frame wall portion 66 which is lowered forward, the projecting portion 82 provided at the front portion of the fuel tank 41 is engaged with the engaging portion 85 . Therefore, even in a structure in which the fuel tank 41 is arranged inside the vehicle body frame 10 , the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
  • the above-described embodiment shows one mode to which the present invention is applied, and the present invention is not limited to the above-described embodiment.
  • the frame wall portion 66 covers the fuel tank 41 from the rear of the vehicle
  • the vertical wall 88 vertically connects the upper wall 86 and the lower wall 87 on the front side of the vehicle
  • the open portion 89 is located at the rear of the vehicle.
  • a frame wall portion is provided to cover the fuel tank 41 from the front of the vehicle.
  • the front end of the lower wall 87 extends further to the front side of the vehicle than the front end of the upper wall 86, and the distance in the vehicle front-rear direction between the front end of the lower wall 87 and the frame wall portion is the distance between the front end of the lower wall 87 and the frame wall portion. may be smaller than the width L2 of .
  • the motorcycle 1 has been described as an example, but the present invention is not limited to this, and the present invention is a three-wheel saddle type motorcycle having two front wheels or two rear wheels. It is applicable to vehicles and straddle-type vehicles having four or more wheels.
  • a saddle-ride type vehicle comprising a vehicle body frame having an engaging portion and a fuel tank supported by being engaged with the engaging portion, the vehicle body frame is adapted to engage the fuel tank from the outside in the vehicle width direction. and a frame wall portion covering the fuel tank from one of the vehicle front side and the vehicle rear side, wherein the engaging portion is provided on the inner surface of the frame side wall portion, and the engaging portion an upper wall extending in the longitudinal direction of the vehicle in a side view of the vehicle; a lower wall facing the upper wall; an open portion that opens toward the frame wall portion on one side; the fuel tank is provided with a projecting portion that engages in the engaging portion from the open portion; The side end extends further to the one side than the one side end of the upper wall, and the distance in the vehicle front-rear direction between the one side end of the lower wall and the frame wall is A saddle-ride type vehicle, wherein the width of the projecting portion in the vehicle front-rear direction is smaller than that of the projecting portion.
  • the projecting portion of the fuel tank is prevented from entering between one end of the lower wall of the engaging portion and the frame wall portion. It can be easily engaged.
  • the one-side end of the lower wall extends to one side more than the one-side end of the upper wall, the upper wall is less likely to interfere with the protrusion. Therefore, even in a structure in which the fuel tank is arranged inside the body frame, the fuel tank can be easily assembled to the body frame.
  • the projecting portion includes a shaft extending in the vehicle width direction and an engaging member rotatably supported by the shaft, and the engaging member engages with the engaging portion.
  • Straddle type vehicle according to any one of configurations 1 to 4. According to this configuration, since the engaging member rotates around the axis extending in the vehicle width direction, the engaging member can be easily engaged with the engaging portion.
  • the fuel tank is disposed behind the engine to which the fuel of the fuel tank is supplied, in a forward-downward posture when viewed from the side of the vehicle, and the frame wall portion is located above the rear wheels when viewed from the side of the vehicle. 6.
  • the saddle-riding vehicle according to any one of configurations 1 to 5, wherein the one is located in the rear of the vehicle, and the projecting portion is provided in the front portion of the fuel tank. According to this configuration, the fuel tank can be arranged compactly along the frame wall portion that is arranged above the rear wheel and downwardly forward.
  • the mass of the saddle-ride type vehicle can be centralized.
  • the fuel tank when the fuel tank is lowered along the frame wall portion that is downwardly forward, the projecting portion provided at the front portion of the fuel tank is engaged with the engaging portion. Therefore, even in a structure in which the fuel tank is arranged inside the body frame, the fuel tank can be easily assembled to the body frame.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

The present invention facilitates the mounting of a fuel tank onto a vehicle body frame.　This straddle-type vehicle comprises a vehicle body frame (10) provided with an engagement part (85), and a fuel tank (41) that engages with and is supported by the engagement part (85). The engagement part (85) is provided to inner surfaces of frame-side wall parts (67, 68). The engagement part (85) comprises, as seen from a side view of the vehicle, an upper wall (86), a lower wall (87), a vertical wall (88) that extends in the up-down direction of the vehicle, and an opening part (89) that is open toward a frame wall part (66). A protruding part (82), which engages with the inside of the engagement part (85) from the opening part (89), is provided to the fuel tank (41). The distance (L1) between an end (87b) of the lower wall (87) and the frame wall part (66) in the vehicle front-rear direction is less than the width (L2) of the protruding part (82) in the vehicle front-rear direction.

Description

鞍乗り型車両saddle-riding vehicle
　本発明は、鞍乗り型車両に関する。 The present invention relates to a saddle-ride type vehicle.
　従来、係合部を備える車体フレームと、係合部に係合して支持される燃料タンクとを備える鞍乗り型車両が知られている（例えば、特許文献１参照）。特許文献１では、燃料タンクは、車体フレームの外側面に設けられた係合部に係合し、車体の外側に露出する。 Conventionally, a straddle-type vehicle is known that includes a vehicle body frame that includes an engaging portion and a fuel tank that is engaged and supported by the engaging portion (see Patent Document 1, for example). In Patent Document 1, the fuel tank engages with an engaging portion provided on the outer surface of the vehicle body frame and is exposed to the outside of the vehicle body.
特開２０１５－６７２４７号公報JP 2015-67247 A
　ところで、燃料タンクが車体フレームの内側に配置される構造では、車体フレームの内側が見え難くなるため、車体フレームに対する燃料タンクの組み付けに手間がかかることがある。
　本発明は、上述した事情に鑑みてなされたものであり、鞍乗り型車両において、車体フレームに対する燃料タンクの組み付けを容易にすることを目的とする。 By the way, in a structure in which the fuel tank is arranged inside the body frame, it is difficult to see the inside of the body frame.
SUMMARY OF THE INVENTION An object of the present invention is to facilitate assembly of a fuel tank to a vehicle body frame in a saddle type vehicle.
　この明細書には、２０２１年３月３０日に出願された日本国特許出願・特願２０２１－０５８０４９の全ての内容が含まれる。
　鞍乗り型車両は、係合部を備える車体フレームと、前記係合部に係合して支持される燃料タンクとを備える鞍乗り型車両において、前記車体フレームは、前記燃料タンクを車幅方向外側から覆う左右一対のフレーム側壁部と、前記燃料タンクを車両前方及び車両後方の一方から覆うフレーム壁部とを備え、前記係合部は、前記フレーム側壁部の内面に設けられ、前記係合部は、車両側面視で、車両前後方向に延びる上壁と、前記上壁に対向する下壁と、車両前後方向で前記一方の反対側である他方の側で車両上下方向に延びる縦壁と、前記一方の側で前記フレーム壁部に向けて開放する開放部とを備え、前記燃料タンクには、前記開放部から前記係合部内に係合する突出部が設けられ、前記下壁における前記一方の側の端は、前記上壁における前記一方の側の端よりも前記一方の側に延出し、前記下壁における前記一方の側の前記端と前記フレーム壁部との車両前後方向の距離は、前記突出部の車両前後方向の幅よりも小さいことを特徴とする。 This specification includes all the contents of Japanese Patent Application/Japanese Patent Application No. 2021-058049 filed on March 30, 2021.
A saddle-ride type vehicle is a saddle-ride type vehicle including a body frame having an engaging portion and a fuel tank supported by being engaged with the engaging portion, wherein the body frame extends the fuel tank in a vehicle width direction. A pair of left and right frame side wall portions that cover the fuel tank from the outside, and a frame wall portion that covers the fuel tank from one of the vehicle front side and the vehicle rear side. When viewed from the side of the vehicle, the portion includes an upper wall extending in the longitudinal direction of the vehicle, a lower wall facing the upper wall, and a vertical wall extending in the vertical direction of the vehicle on the other side opposite to the one in the longitudinal direction of the vehicle. and an open portion that opens toward the frame wall portion on the one side, the fuel tank is provided with a protruding portion that engages in the engaging portion from the open portion, and the lower wall has the The one-side end extends further to the one side than the one-side end of the upper wall, and the distance in the vehicle front-rear direction between the one-side end of the lower wall and the frame wall portion is smaller than the width of the projecting portion in the longitudinal direction of the vehicle.
　車体フレームに対する燃料タンクの組み付けを容易にできる。 　The fuel tank can be easily assembled to the body frame.
図１は、本発明の実施の形態に係る自動二輪車の左側面図である。FIG. 1 is a left side view of a motorcycle according to an embodiment of the invention. 図２は、車体フレームの左側面図である。FIG. 2 is a left side view of the vehicle body frame. 図３は、車体フレームを上方から見た平面図である。FIG. 3 is a plan view of the vehicle body frame viewed from above. 図４は、車体フレームを左下方側から見た斜視図である。FIG. 4 is a perspective view of the vehicle body frame viewed from the lower left side. 図５は、自動二輪車を車幅方向の中央部で切断した断面図である。FIG. 5 is a cross-sectional view of the motorcycle cut at the center in the vehicle width direction. 図６は、後側内部空間の内側の部品の配置を示す断面図である。FIG. 6 is a cross-sectional view showing the arrangement of parts inside the rear internal space. 図７は、図６における燃料タンクの後部の取付構造を拡大した拡大断面図である。7 is an enlarged cross-sectional view of the attachment structure of the rear portion of the fuel tank in FIG. 6. FIG. 図８は、図６のＶＩＩＩ－ＶＩＩＩ断面図である。FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 図９は、図８のＩＸ－ＩＸ断面図である。9 is a cross-sectional view taken along line IX-IX of FIG. 8. FIG.
　以下、図面を参照して本発明の一実施形態について説明する。なお、説明中、前後左右および上下といった方向の記載は、特に記載がなければ車体に対する方向と同一とする。また、各図に示す符号ＦＲは車体前方を示し、符号ＵＰは車体上方を示し、符号ＬＨは車体左方を示す。 An embodiment of the present invention will be described below with reference to the drawings. In the description, directions such as front, rear, left, right, and up and down are the same as the directions with respect to the vehicle body unless otherwise specified. In each figure, FR indicates the front of the vehicle body, UP indicates the upper side of the vehicle body, and LH indicates the left side of the vehicle body.
　図１は、本発明の実施の形態に係る自動二輪車１の左側面図である。
　自動二輪車１は、車体フレーム１０と、車体フレーム１０に支持されるエンジン１１と、前輪２を操舵自在に支持するフロントフォーク１２と、後輪３を支持するスイングアーム１３と、乗員用のシート１４とを備える車両である。
　自動二輪車１は、乗員がシート１４に跨るようにして着座する鞍乗り型車両である。シート１４は、車体フレーム１０の後部の上方に設けられる。 FIG. 1 is a left side view of a motorcycle 1 according to an embodiment of the invention.
The motorcycle 1 includes a body frame 10, an engine 11 supported by the body frame 10, a front fork 12 supporting a front wheel 2 in a steerable manner, a swing arm 13 supporting a rear wheel 3, and a seat 14 for an occupant. and a vehicle.
The motorcycle 1 is a saddle-riding type vehicle in which a rider straddles a seat 14 and sits thereon. The seat 14 is provided above the rear portion of the vehicle body frame 10 .
　図２は、車体フレーム１０の左側面図である。
　図１及び図２を参照し、車体フレーム１０は、車体フレーム１０の前端に設けられるヘッドパイプ１５と、ヘッドパイプ１５から自動二輪車１の後部まで後方に延出するメインフレーム１６と、メインフレーム１６の後部から下方に延出するピボットフレーム１７とを備える。 2 is a left side view of the body frame 10. FIG.
1 and 2, the body frame 10 includes a head pipe 15 provided at the front end of the body frame 10, a main frame 16 extending rearward from the head pipe 15 to the rear portion of the motorcycle 1, and a main frame 16. a pivot frame 17 extending downwardly from the rear of the .
　メインフレーム１６は、ヘッドパイプ１５から後方に延出する中空のメインチューブ１８と、メインチューブ１８の後端から後方に延びるシートフレーム部１９とを備える。
　シートフレーム部１９は、メインチューブ１８よりも上下の長さが大きく、メインチューブ１８に対し下方に膨出する。
　ピボットフレーム１７は、シートフレーム部１９の下端から下方に延出する。シート１４は、シートフレーム部１９に支持される。シート１４は、シートフレーム部１９の上面を上方から覆う。 The main frame 16 includes a hollow main tube 18 extending rearward from the head pipe 15 and a seat frame portion 19 extending rearward from the rear end of the main tube 18 .
The seat frame portion 19 has a vertical length greater than that of the main tube 18 and bulges downward with respect to the main tube 18 .
The pivot frame 17 extends downward from the lower end of the seat frame portion 19 . The seat 14 is supported by the seat frame portion 19 . The seat 14 covers the upper surface of the seat frame portion 19 from above.
　フロントフォーク１２は、ヘッドパイプ１５に挿通されるステアリングシャフト（不図示）を介し、左右に操舵自在に支持される。前輪２は、フロントフォーク１２の下端部に設けられる車軸２ａに支持される。
　フロントフォーク１２の上端部には、操舵用のハンドル２１が取り付けられる。 The front fork 12 is supported so as to be steerable left and right via a steering shaft (not shown) inserted through the head pipe 15 . The front wheel 2 is supported by an axle 2 a provided at the lower end of the front fork 12 .
A steering handle 21 is attached to the upper end of the front fork 12 .
　スイングアーム１３は、ピボットフレーム１７に支持されるピボット軸２２に支持される。ピボット軸２２は、車幅方向（左右方向）に水平に延びる軸である。スイングアーム１３の前端部には、ピボット軸２２が挿通される。スイングアーム１３は、ピボット軸２２を中心に上下に揺動する。
　後輪３は、スイングアーム１３の後端部に設けられる車軸３ａに支持される。
　スイングアーム１３の後部とシートフレーム部１９の後部との間には、左右一対のリアクション２３が掛け渡される。 The swing arm 13 is supported by a pivot shaft 22 supported by the pivot frame 17 . The pivot shaft 22 is a shaft extending horizontally in the vehicle width direction (horizontal direction). A pivot shaft 22 is inserted through the front end of the swing arm 13 . The swing arm 13 swings up and down around the pivot shaft 22 .
The rear wheel 3 is supported by an axle 3 a provided at the rear end of the swing arm 13 .
A pair of left and right reactions 23 are spanned between the rear portion of the swing arm 13 and the rear portion of the seat frame portion 19 .
　エンジン１１は、メインフレーム１６の下方において、前輪２の後方且つピボットフレーム１７の前方に配置される。
　エンジン１１は、車幅方向に延びるクランク軸３０を収納するクランクケース３１と、クランクケース３１の前面から前方に延出するシリンダー部３２とを備える内燃機関である。
　エンジン１１は、シリンダー部３２の軸線３２ａが車両側面視で略水平に車両前後方向に延びる水平エンジンである。
　クランク軸３０に接続されるピストン（不図示）は、軸線３２ａに沿ってシリンダー部３２内を前後に往復運動する。 The engine 11 is arranged below the main frame 16 behind the front wheels 2 and in front of the pivot frame 17 .
The engine 11 is an internal combustion engine that includes a crankcase 31 that houses a crankshaft 30 that extends in the vehicle width direction, and a cylinder portion 32 that extends forward from the front surface of the crankcase 31 .
The engine 11 is a horizontal engine in which the axis 32a of the cylinder portion 32 extends substantially horizontally in the vehicle front-rear direction when viewed from the side of the vehicle.
A piston (not shown) connected to the crankshaft 30 reciprocates back and forth within the cylinder portion 32 along an axis 32a.
　クランクケース３１の後部には、クランク軸３０の回転を減速して出力する変速機（不図示）が収納される。この変速機の出力軸と後輪３とは、駆動チェーン３３によって接続される。
　エンジン１１の排気管３５は、シリンダー部３２の下面に設けられる排気ポートから後方に延びる。排気管３５の後端には、マフラー３６が接続される。 A transmission (not shown) that decelerates and outputs the rotation of the crankshaft 30 is housed in the rear portion of the crankcase 31 . The output shaft of this transmission and the rear wheels 3 are connected by a drive chain 33 .
An exhaust pipe 35 of the engine 11 extends rearward from an exhaust port provided on the lower surface of the cylinder portion 32 . A muffler 36 is connected to the rear end of the exhaust pipe 35 .
　エンジン１１に吸気を供給する吸気装置３７は、エアクリーナー３８と、シリンダー部３２に接続されるスロットル装置３９と、エアクリーナー３８とスロットル装置３９とを接続するコネクティングチューブ４０とを備える。
　燃料タンク４１は、エアクリーナー３８の下方に配置される。
　自動二輪車１の各部に電力を供給するバッテリー４２は、エアクリーナー３８に支持される。 An intake device 37 that supplies intake air to the engine 11 includes an air cleaner 38 , a throttle device 39 connected to the cylinder portion 32 , and a connecting tube 40 that connects the air cleaner 38 and the throttle device 39 .
A fuel tank 41 is arranged below the air cleaner 38 .
A battery 42 that supplies electric power to each part of the motorcycle 1 is supported by the air cleaner 38 .
　乗員が足を載せるステップ４３は、ステップホルダー４４を介してピボットフレーム１７に支持される。
　部品や物品を収納可能な収納ボックス４５は、シートフレーム部１９の外側面に取り付けられる。
　ヘッドライト４６は、ヘッドパイプ１５の前方に配置される。フロントフェンダー４７は、フロントフォーク１２に取り付けられる。
　後輪３を上方から覆うリアフェンダー４８は、シートフレーム部１９に取り付けられる。 A step 43 on which an occupant puts his/her foot is supported by the pivot frame 17 via a step holder 44 .
A storage box 45 capable of storing parts and articles is attached to the outer surface of the seat frame portion 19 .
The headlight 46 is arranged in front of the head pipe 15 . The front fender 47 is attached to the front fork 12 .
A rear fender 48 that covers the rear wheel 3 from above is attached to the seat frame portion 19 .
　図３は、車体フレーム１０を上方から見た平面図である。図４は、車体フレーム１０を左下方側から見た斜視図である。
　図２～図４を参照し、メインフレーム１６は、複数の板材（分割体）を溶接で接合して中空のケース状に形成されている。
　詳細には、メインフレーム１６は、メインフレーム１６の左側の側面部を構成する左側部材５１と、メインフレーム１６の右側の側面部を構成する右側部材５２とを備える。
　左側部材５１及び右側部材５２は、上下方向及び前後方向に延びる板材であり、全体的に見ると、板厚方向を車幅方向に指向させて配置される。左側部材５１及び右側部材５２は、上下方向よりも前後方向に長い板材であり、メインチューブ１８及びシートフレーム部１９を構成する。
　左側部材５１と右側部材５２とは、略左右対称に設けられる。 FIG. 3 is a plan view of the vehicle body frame 10 viewed from above. FIG. 4 is a perspective view of the vehicle body frame 10 viewed from the lower left side.
2 to 4, the main frame 16 is formed into a hollow case shape by joining a plurality of plate members (divided bodies) by welding.
Specifically, the main frame 16 includes a left member 51 forming the left side surface of the main frame 16 and a right member 52 forming the right side surface of the main frame 16 .
The left member 51 and the right member 52 are plate members extending in the vertical direction and the front-rear direction, and are arranged with the plate thickness direction directed in the vehicle width direction when viewed as a whole. The left member 51 and the right member 52 are plate members longer in the front-rear direction than in the up-down direction, and constitute the main tube 18 and the seat frame portion 19 .
The left member 51 and the right member 52 are provided substantially symmetrically.
　また、メインフレーム１６は、メインフレーム１６の下面部を構成する下側部材５３と、メインフレーム１６の後面部を構成する後側部材５４とを備える。下側部材５３は、板厚方向を上下方向に指向させて配置される板材である。
　詳細には、下側部材５３は、メインフレーム１６のメインチューブ１８の下面部を構成する第１の下側部材５５と、メインフレーム１６のシートフレーム部１９の下面部を構成する第２の下側部材５６とを備える。 The main frame 16 also includes a lower member 53 forming the lower surface of the main frame 16 and a rear member 54 forming the rear surface of the main frame 16 . The lower member 53 is a plate member arranged with its plate thickness direction oriented in the vertical direction.
Specifically, the lower member 53 includes a first lower member 55 forming the lower surface of the main tube 18 of the main frame 16 and a second lower member 55 forming the lower surface of the seat frame portion 19 of the main frame 16 . and a side member 56 .
　メインフレーム１６のメインチューブ１８は、左側部材５１の上部及び右側部材５２の上部を互いに接合させるとともに、左側部材５１の下部と右側部材５２の下部とを第１の下側部材５５によって車幅方向に接続することで、前後に延びるチューブ状に形成される。
　メインチューブ１８の前端の開口は、ヘッドパイプ１５の後面によって閉じられる。 The main tube 18 of the main frame 16 joins the upper portion of the left member 51 and the upper portion of the right member 52 to each other, and the lower portion of the left member 51 and the lower portion of the right member 52 are connected by a first lower member 55 in the vehicle width direction. By connecting to , it is formed in a tube shape extending back and forth.
The front end opening of the main tube 18 is closed by the rear surface of the head pipe 15 .
　メインフレーム１６のシートフレーム部１９は、左側部材５１の後部の下縁部と右側部材５２の後部の下縁部とを第２の下側部材５６によって車幅方向に接続するとともに、左側部材５１の後端部と右側部材５２の後端部とを後側部材５４によって車幅方向に接続することで、中空のケース状に形成される。
　車両側面視で、左側部材５１の後部の下縁部、右側部材５２の後部の下縁部、及び第２の下側部材５６は、後上がりに傾斜している。 The seat frame portion 19 of the main frame 16 connects the lower edge portion of the rear portion of the left member 51 and the lower edge portion of the rear portion of the right member 52 with a second lower member 56 in the vehicle width direction. A hollow case shape is formed by connecting the rear end portion and the rear end portion of the right side member 52 with the rear side member 54 in the vehicle width direction.
As viewed from the side of the vehicle, the lower edge portion of the rear portion of the left member 51, the lower edge portion of the rear portion of the right member 52, and the second lower member 56 are inclined rearwardly upward.
　シートフレーム部１９の上面の大部分には、上方に開口する開口５７が設けられる。開口５７は、平面視では、車幅方向よりも車両前後方向に長く延びる。開口５７は、左側部材５１の上部及び右側部材５２の上部を切り欠くようにして設けられる。
　シートフレーム部１９の内側には、左側部材５１、右側部材５２、第２の下側部材５６、及び後側部材５４によって囲まれる後側内部空間５８が形成される。後側内部空間５８は、開口５７から上方に露出する。
　左側部材５１及び右側部材５２は、後側内部空間５８を車幅方向に区画する側壁である。第２の下側部材５６は、後側内部空間５８を下方及び後方から覆う下壁である。 Most of the upper surface of the seat frame portion 19 is provided with an opening 57 that opens upward. The opening 57 extends longer in the vehicle front-rear direction than in the vehicle width direction in plan view. The opening 57 is provided by cutting the upper portion of the left member 51 and the upper portion of the right member 52 .
Inside the seat frame portion 19, a rear internal space 58 surrounded by the left member 51, the right member 52, the second lower member 56, and the rear member 54 is formed. The rear internal space 58 is exposed upward from the opening 57 .
The left member 51 and the right member 52 are side walls that define the rear internal space 58 in the vehicle width direction. The second lower member 56 is a lower wall that covers the rear internal space 58 from below and from behind.
　後側部材５４は、シートフレーム部１９の後面を構成する後壁部５４ａと、シートフレーム部１９の後端部の上面を構成する上壁部５４ｂとを一体に備える板材である。
　後壁部５４ａは、左側部材５１の後縁部と右側部材５２の後縁部とを車幅方向に接続する。上壁部５４ｂは、左側部材５１の後端部の上縁と右側部材５２の後端部の上縁とを車幅方向に接続する。開口５７は、上壁部５４ｂの前方に位置する。 The rear member 54 is a plate member integrally including a rear wall portion 54a that forms the rear surface of the seat frame portion 19 and an upper wall portion 54b that forms the upper surface of the rear end portion of the seat frame portion 19. As shown in FIG.
The rear wall portion 54a connects the rear edge portion of the left member 51 and the rear edge portion of the right member 52 in the vehicle width direction. The upper wall portion 54b connects the upper edge of the rear end portion of the left member 51 and the upper edge of the rear end portion of the right member 52 in the vehicle width direction. The opening 57 is positioned in front of the upper wall portion 54b.
　シートフレーム部１９の前端部には、メインチューブ１８の後端部に対し下方に延出するエンジンハンガー部６０が設けられる。エンジンハンガー部６０は、左側部材５１の前端部の下部及び右側部材５２の前端部の下部にそれぞれ設けられる。
　クランクケース３１（図１）の上部は、車幅方向に延びるエンジン固定ボルト６５ａ（図１）によってエンジンハンガー部６０に締結される。 An engine hanger portion 60 extending downward from the rear end portion of the main tube 18 is provided at the front end portion of the seat frame portion 19 . The engine hanger portion 60 is provided at a lower front end portion of the left member 51 and a lower front end portion of the right member 52, respectively.
An upper portion of the crankcase 31 (Fig. 1) is fastened to the engine hanger portion 60 by an engine fixing bolt 65a (Fig. 1) extending in the vehicle width direction.
　第１の下側部材５５は、メインチューブ１８の下面部を構成する下壁部６１と、下壁部６１の後端から下方に延出する前壁部６２とを一体に備える。
　前壁部６２は、車両前方側に面する壁部であり、左右のエンジンハンガー部６０の前縁を車幅方向に互いに接続する。
　前壁部６２には、前壁部６２を車両前後方向に貫通する外気取り込み口６３が設けられる。外気取り込み口６３は、前壁部６２を、前壁部６２の下縁から上方に切り欠くようにして設けられる開口である。外気取り込み口６３は、車両前方に向けて開口する。 The first lower member 55 integrally includes a lower wall portion 61 forming the lower surface portion of the main tube 18 and a front wall portion 62 extending downward from the rear end of the lower wall portion 61 .
The front wall portion 62 is a wall portion facing the vehicle front side, and connects the front edges of the left and right engine hanger portions 60 to each other in the vehicle width direction.
The front wall portion 62 is provided with an outside air intake port 63 that penetrates the front wall portion 62 in the vehicle front-rear direction. The outside air intake port 63 is an opening provided by cutting the front wall portion 62 upward from the lower edge of the front wall portion 62 . The outside air intake 63 opens toward the front of the vehicle.
　シートフレーム部１９の下面において、車両前後方向で前壁部６２と第２の下側部材５６との間の部分は、下方に開放する開放部６４である。開放部６４は、後側内部空間５８を下方に露出させる。 A portion of the lower surface of the seat frame portion 19 between the front wall portion 62 and the second lower member 56 in the longitudinal direction of the vehicle is an open portion 64 that opens downward. The open portion 64 exposes the rear internal space 58 downward.
　ピボットフレーム１７は、第２の下側部材５６の前方に位置する。ピボットフレーム１７は、左右一対の側壁部１７ａ，１７ｂと、側壁部１７ａ，１７ｂの後縁を車幅方向に接続する壁部１７ｃとを備える。
　ピボットフレーム１７は、左側の側壁部１７ａの上縁１７ｄが、シートフレーム部１９における左側部材５１の下縁に接合され、右側の側壁部１７ｂの上縁が、シートフレーム部１９における右側部材５２の下縁に接合される。
　壁部１７ｃは、車両側面視で、後上がりに傾斜している。シートフレーム部１９の下面を構成する第２の下側部材５６は、壁部１７ｃの上端に連続して後上がりに上方に延びる。
　平面視では、壁部１７ｃは、開放部６４の後部を下方から覆う。 The pivot frame 17 is positioned forward of the second lower member 56 . The pivot frame 17 includes a pair of left and right side wall portions 17a and 17b, and a wall portion 17c connecting rear edges of the side wall portions 17a and 17b in the vehicle width direction.
The upper edge 17d of the left side wall portion 17a of the pivot frame 17 is joined to the lower edge of the left side member 51 of the seat frame portion 19, and the upper edge of the right side wall portion 17b is joined to the right side member 52 of the seat frame portion 19. Joined to the lower edge.
The wall portion 17c is inclined rearwardly upward as viewed from the side of the vehicle. A second lower member 56 forming the lower surface of the seat frame portion 19 extends rearwardly upward continuously from the upper end of the wall portion 17c.
In plan view, the wall portion 17c covers the rear portion of the open portion 64 from below.
　図５は、自動二輪車１を車幅方向の中央部で切断した断面図である。図６は、後側内部空間５８の内側の部品の配置を示す断面図である。図６では、図５よりも左側に寄った位置の断面が示される。
　図５及び図６を参照し、エアクリーナー３８、燃料タンク４１、及びバッテリー４２は、シートフレーム部１９内の後側内部空間５８に収納され、開口５７の下方に位置する。
　シート１４は、シート１４の前端部のヒンジ部（不図示）を中心に上下に回動（開閉）可能に設けられる。
　自動二輪車１は、開口５７の略全体を塞ぐ開口カバー５９をシート１４の下方に備える。 FIG. 5 is a cross-sectional view of the motorcycle 1 cut at the center in the vehicle width direction. FIG. 6 is a cross-sectional view showing the arrangement of components inside the rear internal space 58. As shown in FIG. In FIG. 6, a cross section at a position closer to the left than in FIG. 5 is shown.
5 and 6, the air cleaner 38, the fuel tank 41, and the battery 42 are accommodated in the rear internal space 58 inside the seat frame portion 19 and positioned below the opening 57. As shown in FIG.
The seat 14 is provided so as to be rotatable (openable and closable) up and down around a hinge (not shown) at the front end of the seat 14 .
The motorcycle 1 has an opening cover 59 below the seat 14 that closes substantially the entire opening 57 .
　燃料タンク４１は、車両前後方向に長い中空の容器である。燃料タンク４１は、後側内部空間５８において、ピボットフレーム１７の上方で、外気取り込み口６３の後方且つ後側部材５４の前方に配置される。燃料タンク４１は、シートフレーム部１９に支持される。
　燃料タンク４１は、車両側面視において、エンジン１１のクランクケース３１の後上方で、前下がり（後上がり）の姿勢で配置される。このため、車両側面視で、燃料タンク４１の前端部４１ａは、燃料タンク４１の後端部４１ｂよりも下方に位置する。また、燃料タンク４１の燃料は、燃料が減少すると、エンジン１１に近いとともに位置が低い前端部４１ａ側に集まる。このため、自動二輪車１のマスの集中化を図ることができるとともに、自動二輪車の重心を低くできる。 The fuel tank 41 is a hollow container elongated in the longitudinal direction of the vehicle. The fuel tank 41 is arranged in the rear internal space 58 above the pivot frame 17 , behind the outside air intake 63 and in front of the rear member 54 . The fuel tank 41 is supported by the seat frame portion 19 .
The fuel tank 41 is arranged in a forward-downward (rearward-up) posture above and rearwardly of the crankcase 31 of the engine 11 when viewed from the side of the vehicle. Therefore, the front end portion 41a of the fuel tank 41 is positioned below the rear end portion 41b of the fuel tank 41 when viewed from the side of the vehicle. Further, when the fuel in the fuel tank 41 decreases, the fuel in the fuel tank 41 gathers on the side of the front end portion 41a which is closer to the engine 11 and located at a lower position. Therefore, the mass of the motorcycle 1 can be concentrated, and the center of gravity of the motorcycle can be lowered.
　燃料タンク４１は、後側内部空間５８内において、燃料タンク４１の下面４１ｋが第２の下側部材５６に沿うように、後上がりに傾斜して配置される。このように、燃料タンク４１をシートフレーム部１９の下面である第２の下側部材５６に沿って配置することで、燃料タンク４１を後側内部空間５８にコンパクトに配置できる。第２の下側部材５６は、後輪３を上方から覆う。第２の下側部材５６は、後輪３の前部の上面に沿って前下がりに傾斜している。 The fuel tank 41 is disposed in the rear internal space 58 so that the lower surface 41k of the fuel tank 41 is along the second lower member 56 and is inclined rearwardly upward. By arranging the fuel tank 41 along the second lower member 56 that is the lower surface of the seat frame portion 19 in this way, the fuel tank 41 can be compactly arranged in the rear internal space 58 . The second lower member 56 covers the rear wheel 3 from above. The second lower member 56 is inclined forward and downward along the upper surface of the front portion of the rear wheel 3 .
　燃料タンク４１の上面部４１ｃは、車両側面視で、前下がりに傾斜している。
　上面部４１ｃの後部には、給油口４１ｄが設けられる。給油口４１ｄは、上面部４１ｃから上方に突出する筒状部である。給油口４１ｄの上端の開口は、キャップ４１ｅで塞がれる。
　上面部４１ｃの前部には、燃料ポンプ７６が取り付けられる。燃料ポンプ７６は、燃料タンク４１内の燃料を、燃料ホース７５を介してシリンダー部３２に供給する。
　燃料タンク４１の前端部４１ａは、クランクケース３１の後部の上方に位置し、クランクケース３１の後部の上面３１ｄを上方から覆う。上面３１ｄは、車両側面視で前上がりに傾斜する傾斜面である。
　燃料タンク４１は、クランクケース３１の後部の上面３１ｄの近傍から後上がりの姿勢で後方へ延びる。 The upper surface portion 41c of the fuel tank 41 is inclined forward and downward when viewed from the side of the vehicle.
A fuel filler port 41d is provided at the rear portion of the upper surface portion 41c. The fuel filler port 41d is a tubular portion protruding upward from the upper surface portion 41c. An upper end opening of the fuel filler port 41d is closed with a cap 41e.
A fuel pump 76 is attached to the front portion of the upper surface portion 41c. The fuel pump 76 supplies the fuel in the fuel tank 41 to the cylinder portion 32 through the fuel hose 75 .
A front end portion 41a of the fuel tank 41 is positioned above the rear portion of the crankcase 31 and covers the upper surface 31d of the rear portion of the crankcase 31 from above. The upper surface 31d is an inclined surface that slopes forward and upward when viewed from the side of the vehicle.
The fuel tank 41 extends rearward from the vicinity of the upper surface 31 d of the rear portion of the crankcase 31 in a rearwardly rising posture.
　エアクリーナー３８は、箱状のエアクリーナーケース７０と、エアクリーナーケース７０内に配置されるフィルター７１とを備える。エアクリーナーケース７０には吸気ダクト７３が接続される。
　エアクリーナー３８は、燃料タンク４１に隣接して、燃料タンク４１の前上方に配置される。
　エアクリーナー３８は、車両側面視で、前下がりの姿勢で配置される。このため、車両側面視で、エアクリーナー３８の前端部３８ａは、エアクリーナー３８の後端部３８ｂよりも下方に位置する。
　詳細には、エアクリーナー３８は、車両側面視で、エアクリーナー３８の下面部３８ｃが燃料タンク４１の上面部４１ｃに沿うように、前下がりの姿勢で配置される。 The air cleaner 38 includes a box-shaped air cleaner case 70 and a filter 71 arranged inside the air cleaner case 70 . An intake duct 73 is connected to the air cleaner case 70 .
The air cleaner 38 is arranged adjacent to the fuel tank 41 and above the front of the fuel tank 41 .
The air cleaner 38 is arranged in a forward-downward posture when viewed from the side of the vehicle. Therefore, the front end portion 38a of the air cleaner 38 is located below the rear end portion 38b of the air cleaner 38 when viewed from the side of the vehicle.
More specifically, the air cleaner 38 is arranged in a downwardly forward posture so that the lower surface portion 38c of the air cleaner 38 is aligned with the upper surface portion 41c of the fuel tank 41 when viewed from the side of the vehicle.
　エアクリーナーケース７０の前面から前方に延びるコネクティングチューブ４０は、後側内部空間５８から車体フレーム１０の外気取り込み口６３を通って前方に延び、スロットル装置３９に接続される。コネクティングチューブ４０は、クランクケース３１の上面及びシリンダー部３２の上面に沿うようにエンジン１１の上方を前方に延び、スロットル装置３９に接続される。 A connecting tube 40 extending forward from the front surface of the air cleaner case 70 extends forward from the rear internal space 58 through the outside air intake port 63 of the vehicle body frame 10 and is connected to the throttle device 39 . The connecting tube 40 extends forward above the engine 11 along the upper surface of the crankcase 31 and the upper surface of the cylinder portion 32 and is connected to the throttle device 39 .
　外気は、外気取り込み口６３から後側内部空間５８内に流入する。後側内部空間５８に流入した外気は、吸気ダクト７３からエアクリーナーケース７０に吸い込まれ、フィルター７１を通過する。フィルター７１によって浄化された外気は、コネクティングチューブ４０を通ってスロットル装置３９に流れる。 Outside air flows into the rear internal space 58 from the outside air intake port 63 . Outside air that has flowed into the rear internal space 58 is sucked into the air cleaner case 70 through the intake duct 73 and passes through the filter 71 . Outside air purified by the filter 71 flows through the connecting tube 40 to the throttle device 39 .
　エアクリーナー３８の前部の上面部には、バッテリー４２を収納するバッテリー収納部７４が設けられる。バッテリー収納部７４は、エアクリーナー３８の後部の上面部に対しエアクリーナー３８の前部の上面部が下方に窪んだ凹部である。 A battery storage section 74 for storing the battery 42 is provided on the top surface of the front portion of the air cleaner 38 . The battery housing portion 74 is a concave portion in which the upper surface portion of the front portion of the air cleaner 38 is recessed downward with respect to the upper surface portion of the rear portion of the air cleaner 38 .
　図７は、図６における燃料タンク４１の後部の取付構造を拡大した拡大断面図である。
　燃料タンク４１は、上下に分割された上半体４１ｇと下半体４１ｈとをフランジ部４１ｉで互いに接合することで、中空の容器状に形成される。
　フランジ部４１ｉは、燃料タンク４１の後端部４１ｂでは、燃料タンク４１の後面から後上方に延びる板状である。
　フランジ部４１ｉには、筒状の弾性部材４１ｊが取り付けられる。弾性部材４１ｊは、例えば、左右一対でフランジ部４１ｉ上に設けられる。弾性部材４１ｊは、例えばゴム等のエラストマーである。 FIG. 7 is an enlarged cross-sectional view of the attachment structure of the rear portion of the fuel tank 41 in FIG.
The fuel tank 41 is formed in the shape of a hollow container by joining an upper half body 41g and a lower half body 41h divided into upper and lower parts with a flange portion 41i.
The flange portion 41i has a plate shape extending rearward and upward from the rear surface of the fuel tank 41 at the rear end portion 41b of the fuel tank 41 .
A cylindrical elastic member 41j is attached to the flange portion 41i. For example, a pair of left and right elastic members 41j are provided on the flange portion 41i. The elastic member 41j is an elastomer such as rubber, for example.
　シートフレーム部１９は、後側内部空間５８内で左側部材５１と右側部材５２とを車幅方向に接続するサブフレーム１９ａを備える。サブフレーム１９ａは、車幅方向に延びる棒状である。
　サブフレーム１９ａの上面には、燃料タンク４１が取り付けられるタンクステー１９ｂが設けられる。タンクステー１９ｂの上面は、フランジ部４１ｉに沿って前下がりに傾斜している。 The seat frame portion 19 includes a sub-frame 19 a that connects the left member 51 and the right member 52 in the vehicle width direction within the rear internal space 58 . The sub-frame 19a is rod-shaped and extends in the vehicle width direction.
A tank stay 19b to which the fuel tank 41 is attached is provided on the upper surface of the sub-frame 19a. The upper surface of the tank stay 19b is inclined forward and downward along the flange portion 41i.
　燃料タンク４１の後部は、弾性部材４１ｊ及びフランジ部４１ｉに上方から挿通されるタンク締結具７７によって、タンクステー１９ｂに締結される。フランジ部４１ｉは、弾性部材４１ｊを介してタンクステー１９ｂの上面に当接する。タンク締結具７７は、例えばボルトである。 The rear portion of the fuel tank 41 is fastened to the tank stay 19b by a tank fastener 77 that is inserted through the elastic member 41j and the flange portion 41i from above. The flange portion 41i contacts the upper surface of the tank stay 19b via an elastic member 41j. The tank fastener 77 is, for example, a bolt.
　図８は、図６のＶＩＩＩ－ＶＩＩＩ断面図である。図９は、図８のＩＸ－ＩＸ断面図である。
　図６、図８及び図９を参照し、燃料タンク４１の前部には、下方に延出する左右一対のステー８０と、左右のステー８０を車幅方向に接続する接続部材８１とが設けられる。
　ステー８０は、燃料タンク４１の下部における左右の側部からそれぞれ下方に延出する板状部である。ステー８０は、板厚方向を車幅方向に指向させて配置される。
　接続部材８１は、燃料タンク４１の下面４１ｋの下方で車幅方向に延びる棒状である。
　接続部材８１の車幅方向の両端部は、ステー８０を貫通して車幅方向に突出する軸８１ａである。左右のステー８０の剛性は、接続部材８１によって高められる。 FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8. FIG.
6, 8 and 9, a pair of left and right stays 80 extending downward and a connecting member 81 connecting the left and right stays 80 in the vehicle width direction are provided at the front portion of the fuel tank 41. be done.
The stay 80 is a plate-like portion extending downward from the left and right side portions of the lower portion of the fuel tank 41 . The stay 80 is arranged with its plate thickness direction oriented in the vehicle width direction.
The connection member 81 is rod-shaped and extends in the vehicle width direction below the lower surface 41k of the fuel tank 41 .
Both ends of the connection member 81 in the vehicle width direction are shafts 81a that penetrate the stay 80 and protrude in the vehicle width direction. The rigidity of the left and right stays 80 is increased by the connecting member 81 .
　燃料タンク４１は、ステー８０から車幅方向外側に突出する突出部８２を備える。
　突出部８２は、軸８１ａと、軸８１ａに支持される左右一対の係合部材８３とを備える。
　係合部材８３は、車幅方向に延びる円筒状の筒状部材である。係合部材８３は、筒の中心の孔８３ａが軸８１ａに嵌合することで軸８１ａに取り付けられる。係合部材８３は、軸８１ａを中心に回転自在である。係合部材８３は、ゴム等のエラストマーで構成される。
　係合部材８３は、ステー８０の車幅方向の外側面に突き当てられる。軸８１ａの先端は、軸方向において孔８３ａ内に位置する。
　突出部８２は、燃料タンク４１の前部に設けられる。突出部８２は、下面４１ｋよりも下方に位置する。突出部８２は、左右のステー８０にそれぞれ設けられる。突出部８２は、燃料タンク４１の車幅方向の外側面に位置する。 The fuel tank 41 has a protrusion 82 that protrudes outward in the vehicle width direction from the stay 80 .
The projecting portion 82 includes a shaft 81a and a pair of right and left engaging members 83 supported by the shaft 81a.
The engagement member 83 is a cylindrical tubular member extending in the vehicle width direction. The engaging member 83 is attached to the shaft 81a by fitting the hole 83a in the center of the cylinder to the shaft 81a. The engaging member 83 is rotatable around the shaft 81a. The engaging member 83 is made of elastomer such as rubber.
The engaging member 83 abuts against the outer surface of the stay 80 in the vehicle width direction. The tip of the shaft 81a is located inside the hole 83a in the axial direction.
The projecting portion 82 is provided at the front portion of the fuel tank 41 . The projecting portion 82 is located below the lower surface 41k. The protrusions 82 are provided on the left and right stays 80 respectively. The projecting portion 82 is positioned on the outer surface of the fuel tank 41 in the vehicle width direction.
　車両側面視で前下がりに傾斜している第２の下側部材５６及びピボットフレーム１７の壁部１７ｃは、燃料タンク４１を下方及び車両後方から覆うフレーム壁部６６を構成する。フレーム壁部６６は、車両側面視で前下がりに傾斜している。フレーム壁部６６は、後輪３の前部の上面に沿って前下がりに傾斜している。
　ここで、フレーム壁部６６は、燃料タンク４１を車両前方及び車両後方の一方である車両後方から覆う。すなわち、車両後方側は車両前後方向の一方であり、車両前方側は車両前後方向の他方である。車両前方側は、車両後方側の反対側である。 The second lower member 56 and the wall portion 17c of the pivot frame 17, which are inclined forward and downward when viewed from the side of the vehicle, form a frame wall portion 66 that covers the fuel tank 41 from below and from the rear of the vehicle. The frame wall portion 66 is inclined forward and downward when viewed from the side of the vehicle. The frame wall portion 66 is inclined forward and downward along the upper surface of the front portion of the rear wheel 3 .
Here, the frame wall portion 66 covers the fuel tank 41 from the vehicle rear side, which is one of the vehicle front side and the vehicle rear side. That is, the vehicle rear side is one of the vehicle front-rear directions, and the vehicle front side is the other of the vehicle front-rear directions. The vehicle front side is the opposite side of the vehicle rear side.
　左側部材５１及びピボットフレーム１７の側壁部１７ａは、燃料タンク４１を左側の車幅方向外側から覆うフレーム側壁部６７を構成する。
　右側部材５２及びピボットフレーム１７の側壁部１７ｂは、燃料タンク４１を右側の車幅方向外側から覆うフレーム側壁部６８を構成する。 The left side member 51 and the side wall portion 17a of the pivot frame 17 form a frame side wall portion 67 that covers the fuel tank 41 from the outside in the vehicle width direction on the left side.
The right side member 52 and the side wall portion 17b of the pivot frame 17 constitute a frame side wall portion 68 that covers the fuel tank 41 from the outside in the vehicle width direction on the right side.
　シートフレーム部１９は、燃料タンク４１の突出部８２が係合する係合部８５を左右一対備える。
　係合部８５は、シートフレーム部１９の内側においてフレーム壁部６６の前方に設けられる。係合部８５は、フレーム側壁部６７の内面、及び、フレーム側壁部６８の内面にそれぞれ設けられる。 The seat frame portion 19 has a pair of left and right engaging portions 85 with which the projecting portion 82 of the fuel tank 41 engages.
The engaging portion 85 is provided in front of the frame wall portion 66 inside the seat frame portion 19 . The engaging portions 85 are provided on the inner surface of the frame side wall portion 67 and the inner surface of the frame side wall portion 68, respectively.
　係合部８５は、車両側面視で、車両前後方向に延びる上壁８６と、上壁８６の下方で上壁８６に対向する下壁８７と、係合部８５の車両前方側で車両上下方向に延びる縦壁８８と、係合部８５の車両後方側でフレーム壁部６６に向けて開放する開放部８９とを備える。下壁８７は、車両前後方向に延びる。
　上壁８６、下壁８７、及び縦壁８８は、車両側面視では、上壁８６、下壁８７、及び縦壁８８が繋がることで、後方側に開放する略Ｕ字状に形成される。ここで、略Ｕ字状は、例えば上壁８６、下壁８７、及び縦壁８８の一部に切り欠きが設けられていたとしても、全体として係合部８５が略Ｕ字状であるものも含む。 The engaging portion 85 includes an upper wall 86 extending in the vehicle front-rear direction in a vehicle side view, a lower wall 87 facing the upper wall 86 below the upper wall 86 , and a vehicle up-down direction on the vehicle front side of the engaging portion 85 . and an opening portion 89 opening toward the frame wall portion 66 on the vehicle rear side of the engaging portion 85 . The lower wall 87 extends in the vehicle front-rear direction.
The upper wall 86, the lower wall 87, and the vertical wall 88 are formed in a substantially U-shape opening rearward by connecting the upper wall 86, the lower wall 87, and the vertical wall 88 in a side view of the vehicle. Here, the substantially U-shape means that the engaging portion 85 as a whole is substantially U-shaped even if notches are provided in a part of the upper wall 86, the lower wall 87, and the vertical wall 88, for example. Also includes
　また、係合部８５は、上壁８６の車幅方向の外端と、下壁８７の車幅方向の外端と、縦壁８８の車幅方向の外端とを接続する側壁９０を備える。上壁８６、下壁８７、及び縦壁８８は、側壁９０から車幅方向内側に延びるリブ状である。係合部８５の車幅方向外側の端面は、側壁９０によって塞がれている。係合部８５の車幅方向内側の端面は、開放している。 The engaging portion 85 also includes a side wall 90 that connects the outer end of the upper wall 86 in the vehicle width direction, the outer end of the lower wall 87 in the vehicle width direction, and the outer end of the vertical wall 88 in the vehicle width direction. . The upper wall 86, the lower wall 87, and the vertical wall 88 are rib-shaped extending inward from the side wall 90 in the vehicle width direction. A side wall 90 closes the end surface of the engaging portion 85 on the outer side in the vehicle width direction. The inner end face in the vehicle width direction of the engaging portion 85 is open.
　係合部８５は、例えば、側壁９０を構成する一枚の板材に対し、上壁８６、下壁８７、及び縦壁８８を曲げ加工することで形成される。
　左側の係合部８５は、側壁９０がフレーム側壁部６７の内面に接合されることで、フレーム側壁部６７に固定される。右側の係合部８５は、側壁９０がフレーム側壁部６８の内面に接合されることで、フレーム側壁部６８に固定される。 The engaging portion 85 is formed, for example, by bending an upper wall 86 , a lower wall 87 , and a vertical wall 88 from a sheet of plate material forming the side wall 90 .
The left engaging portion 85 is fixed to the frame side wall portion 67 by joining the side wall 90 to the inner surface of the frame side wall portion 67 . The right engaging portion 85 is fixed to the frame side wall portion 68 by joining the side wall 90 to the inner surface of the frame side wall portion 68 .
　上壁８６及び下壁８７は、車両側面視で、互いに平行に略水平に前後に延びる。
　下壁８７における車両後方側の端部８７ａ（下壁における一方の側の端部）は、車両側面視で、車両後方側に向かうに従って上方に位置するように傾斜している。
　車両側面視で、端部８７ａは、フレーム壁部６６に対し前方に離間している。車両側面視で、端部８７ａの後上がりの傾斜は、フレーム壁部６６の傾斜と略同一であり、端部８７ａとフレーム壁部６６とは略平行である。 The upper wall 86 and the lower wall 87 extend substantially horizontally in the front-rear direction in parallel with each other when viewed from the side of the vehicle.
An end portion 87a of the lower wall 87 on the vehicle rear side (an end portion on one side of the lower wall) is inclined upward toward the vehicle rear side as viewed from the side of the vehicle.
As viewed from the side of the vehicle, the end portion 87a is spaced forward from the frame wall portion 66 . As viewed from the side of the vehicle, the rearwardly rising inclination of the end portion 87a is substantially the same as the inclination of the frame wall portion 66, and the end portion 87a and the frame wall portion 66 are substantially parallel.
　上壁８６における車両後方側の端部８６ａ（上壁における一方の側の端部）は、車両側面視で、車両後方側に向かうに従って上方に位置するように傾斜している。
　車両側面視で、端部８６ａの後上がりの傾斜は、端部８７ａの傾斜よりも小さい。 An end portion 86a of the upper wall 86 on the vehicle rear side (an end portion on one side of the upper wall) is inclined upward toward the vehicle rear side as viewed from the side of the vehicle.
When viewed from the side of the vehicle, the rearwardly upward inclination of the end portion 86a is smaller than the inclination of the end portion 87a.
　下壁８７における車両後方側の端８７ｂ（下壁における一方の側の端）は、上壁８６における車両後方側の端８６ｂ（上壁における一方の側の端）よりも車両後方側に延出する。
　端８７ｂは、下壁８７の後端である。端８６ｂは、上壁８６の後端である。
　開放部８９は、下壁８７の端８７ｂと上壁８６の端８６ｂとによって区画される開口である。上壁８６の端８６ｂが下壁８７の端８７ｂの前上方に位置するため、開放部８９は、後上方に向けて開口する。 A vehicle rear side end 87b of the lower wall 87 (one side end of the lower wall) extends further to the vehicle rear side than a vehicle rear side end 86b of the upper wall 86 (one side end of the upper wall). do.
The end 87b is the rear end of the lower wall 87. As shown in FIG. The end 86b is the rear end of the top wall 86. As shown in FIG.
The open portion 89 is an opening defined by an end 87b of the lower wall 87 and an end 86b of the upper wall 86 . Since the end 86b of the upper wall 86 is positioned forwardly above the end 87b of the lower wall 87, the open portion 89 opens rearwardly upward.
　縦壁８８は、上壁８６と下壁８７との間で車両上下方向に延びる。縦壁８８は、上壁８６の前端と下壁８７の前端とを上下に接続する。上壁８６の前端は、上壁８６における車両前方側の端であり、下壁８７の前端は、下壁８７における車両前方側の端である。
　縦壁８８は、車両側面視で、突出部８２の係合部材８３の外周に沿うように円弧状に形成される。 The vertical wall 88 extends in the vehicle vertical direction between the upper wall 86 and the lower wall 87 . The vertical wall 88 vertically connects the front end of the upper wall 86 and the front end of the lower wall 87 . The front end of the upper wall 86 is the end of the upper wall 86 on the front side of the vehicle, and the front end of the lower wall 87 is the end of the lower wall 87 on the front side of the vehicle.
The vertical wall 88 is formed in an arc shape along the outer periphery of the engaging member 83 of the projecting portion 82 when viewed from the side of the vehicle.
　図９を参照し、下壁８７における車両後方側の端８７ｂと第２の下側部材５６との車両前後方向の距離Ｌ１は、突出部８２の車両前後方向の幅Ｌ２よりも小さい。幅Ｌ２は、係合部材８３の車両前後方向の幅である。 Referring to FIG. 9, the distance L1 in the vehicle front-rear direction between the vehicle rear side end 87b of the lower wall 87 and the second lower member 56 is smaller than the width L2 of the projecting portion 82 in the vehicle front-rear direction. The width L2 is the width of the engagement member 83 in the vehicle front-rear direction.
　ここで、シートフレーム部１９に対する燃料タンク４１の組み付け手順の一例を説明する。
　まず、燃料タンク４１は、シートフレーム部１９の上面の開口５７から後側内部空間５８内に入れられる。燃料タンク４１は、燃料タンク４１の前部をフレーム壁部６６に沿わせるようにして、前下方に下ろされる。
　燃料タンク４１が前下方に下ろされると、左右の各突出部８２が開放部８９から左右の各係合部８５内に入り、突出部８２は係合部８５に係合する。 Here, an example of the procedure for assembling the fuel tank 41 to the seat frame portion 19 will be described.
First, the fuel tank 41 is put into the rear internal space 58 through the opening 57 on the upper surface of the seat frame portion 19 . The fuel tank 41 is lowered forward and downward so that the front portion of the fuel tank 41 is aligned with the frame wall portion 66 .
When the fuel tank 41 is lowered forward and downward, the left and right projecting portions 82 enter the left and right engaging portions 85 through the open portion 89 , and the projecting portions 82 are engaged with the engaging portions 85 .
　詳細には、燃料タンク４１の突出部８２が係合部８５に係合した状態では、突出部８２は、係合部材８３が上壁８６と下壁８７との間に挟まれるとともに、係合部材８３が縦壁８８に後方から突き当たる。これにより、燃料タンク４１の前部は、係合部８５を介しフレーム側壁部６７及びフレーム側壁部６８に固定される。
　その後、燃料タンク４１の後部は、タンク締結具７７（図７）によって、シートフレーム部１９のタンクステー１９ｂに締結される。 Specifically, when the projection 82 of the fuel tank 41 is engaged with the engagement portion 85, the engagement member 83 is sandwiched between the upper wall 86 and the lower wall 87, and the engagement member 82 is engaged. The member 83 hits the vertical wall 88 from behind. Thereby, the front portion of the fuel tank 41 is fixed to the frame side wall portion 67 and the frame side wall portion 68 via the engaging portion 85 .
After that, the rear portion of the fuel tank 41 is fastened to the tank stay 19b of the seat frame portion 19 by the tank fastener 77 (FIG. 7).
　端８７ｂとフレーム壁部６６との車両前後方向の距離Ｌ１が突出部８２の車両前後方向の幅Ｌ２よりも小さいため、燃料タンク４１を前下方に下ろす際に突出部８２が端８７ｂと第２の下側部材５６との間に落ちることが防止される。このため、突出部８２を係合部８５に容易に係合させることができる。 Since the distance L1 in the vehicle front-rear direction between the end 87b and the frame wall portion 66 is smaller than the width L2 of the projecting portion 82 in the vehicle front-rear direction, the projecting portion 82 is positioned so that the end 87b and the second end 87b do not move when the fuel tank 41 is lowered forward and downward. is prevented from falling between the lower member 56 of the Therefore, the projecting portion 82 can be easily engaged with the engaging portion 85 .
　フレーム壁部６６は前下がりに傾斜しているため、フレーム壁部６６に沿うように燃料タンク４１を前下方に移動させることで、突出部８２を係合部８５に容易に係合させることができる。
　突出部８２の係合部材８３は、軸８１ａを中心に回転自在であるため、フレーム壁部６６及び下壁８７に対し係合部材８３を転がすようにして、係合部材８３を係合部８５に係合させることができる。このため、係合部材８３を係合部８５に容易に係合させることができる。
　突出部８２は、突出部８２の真上の下面４１ｋよりも下方に位置する。これにより、燃料タンク４１を前下方に移動させる際に、燃料タンク４１がフレーム壁部６６に当たり難くなる。このため、係合部材８３を係合部８５に容易に係合させることができる。 Since the frame wall portion 66 is slanted forward and downward, the projecting portion 82 can be easily engaged with the engaging portion 85 by moving the fuel tank 41 forward and downward along the frame wall portion 66 . can.
Since the engaging member 83 of the protruding portion 82 is rotatable around the shaft 81 a , the engaging member 83 is rolled against the frame wall portion 66 and the lower wall 87 so as to move the engaging member 83 to the engaging portion 85 . can be engaged. Therefore, the engaging member 83 can be easily engaged with the engaging portion 85 .
The protruding portion 82 is located below the lower surface 41 k directly above the protruding portion 82 . This makes it difficult for the fuel tank 41 to hit the frame wall portion 66 when the fuel tank 41 is moved forward and downward. Therefore, the engaging member 83 can be easily engaged with the engaging portion 85 .
　下壁８７の後端部である端部８７ａが前下がりに傾斜しているため、係合部材８３を端部８７ａに沿わせて前下方に移動させることができる。
　上壁８６の後端部である端部８６ａは、後上がり（前下がり）に傾斜している。これにより、開放部８９が上下に広くなるため、係合部材８３を開放部８９から係合部８５に係合させ易い。また、係合部材８３を端部８６ａに沿うように前下方にガイドできる。このため、係合部材８３を係合部８５に係合させ易い。 Since the end portion 87a, which is the rear end portion of the lower wall 87, is inclined forward and downward, the engaging member 83 can be moved forward and downward along the end portion 87a.
An end portion 86a, which is the rear end portion of the upper wall 86, is slanted rearwardly upward (frontwardly downward). As a result, the opening portion 89 is widened in the vertical direction, so that the engaging member 83 can be easily engaged with the engaging portion 85 from the opening portion 89 . Further, the engaging member 83 can be guided forward and downward along the end portion 86a. Therefore, it is easy to engage the engaging member 83 with the engaging portion 85 .
　以上説明したように、本発明を適用した実施の形態によれば、自動二輪車１は、係合部８５を備える車体フレーム１０と、係合部８５に係合して支持される燃料タンク４１とを備え、車体フレーム１０は、燃料タンク４１を車幅方向外側から覆う左右一対のフレーム側壁部６７，６８と、燃料タンク４１を車両前方及び車両後方の一方である車両後方から覆うフレーム壁部６６とを備える。係合部８５は、フレーム側壁部６７，６８の内面に設けられ、係合部８５は、車両側面視で、車両前後方向に延びる上壁８６と、上壁８６に対向する下壁８７と、車両前後方向で一方の反対側である他方の側（車両前方側）で上壁８６と下壁８７とを上下に接続する縦壁８８と、一方の側でフレーム壁部６６に向けて開放する開放部８９とを備え、燃料タンク４１には、開放部８９から係合部８５内に係合する突出部８２が設けられ、下壁８７における一方の側の端８７ｂは、上壁８６における一方の側の端８６ｂよりも一方の側に延出し、下壁８７における一方の側の端８７ｂとフレーム壁部６６との車両前後方向の距離Ｌ１は、突出部８２の車両前後方向の幅Ｌ２よりも小さい。
　この構成によれば、距離Ｌ１と幅Ｌ２との関係により、係合部８５の下壁８７における一方の側の端８７ｂとフレーム壁部６６との間に燃料タンク４１の突出部８２が入り込むことが防止されるため、突出部８２を開放部８９から係合部８５内に容易に係合させることができる。また、下壁８７における一方の側の端８７ｂが、上壁８６における一方の側の端８６ｂよりも一方の側に延出するため、上壁８６が突出部８２の邪魔になり難い。このため、車体フレーム１０の内側に燃料タンク４１が配置される構造であっても、車体フレーム１０に対し燃料タンク４１を容易に組み付けできる。 As described above, according to the embodiment to which the present invention is applied, the motorcycle 1 includes the vehicle body frame 10 having the engaging portion 85 and the fuel tank 41 supported by being engaged with the engaging portion 85. The body frame 10 includes a pair of left and right frame side wall portions 67 and 68 that cover the fuel tank 41 from outside in the vehicle width direction, and a frame wall portion 66 that covers the fuel tank 41 from one of the vehicle front side and the vehicle rear side, that is, the vehicle rear side. and The engaging portion 85 is provided on the inner surfaces of the frame side walls 67 and 68. The engaging portion 85 includes an upper wall 86 extending in the longitudinal direction of the vehicle, a lower wall 87 facing the upper wall 86, and a lower wall 87 facing the upper wall 86. A vertical wall 88 that vertically connects an upper wall 86 and a lower wall 87 on the other side (vehicle front side) opposite to one side in the vehicle front-rear direction, and opens toward the frame wall portion 66 on one side. The fuel tank 41 is provided with a projecting portion 82 that engages from the opening portion 89 into the engaging portion 85 , and one end 87 b of the lower wall 87 is connected to the other end of the upper wall 86 . The distance L1 in the vehicle front-rear direction between the one-side end 87b of the lower wall 87 and the frame wall portion 66 is greater than the width L2 of the projecting portion 82 in the vehicle front-rear direction. is also small.
According to this configuration, the projecting portion 82 of the fuel tank 41 can enter between the frame wall portion 66 and one end 87b of the lower wall 87 of the engaging portion 85 due to the relationship between the distance L1 and the width L2. Therefore, the projecting portion 82 can be easily engaged with the engaging portion 85 from the opening portion 89 . In addition, since the one-side end 87b of the lower wall 87 extends further to one side than the one-side end 86b of the upper wall 86, the upper wall 86 is less likely to interfere with the projecting portion 82. FIG. Therefore, even in a structure in which the fuel tank 41 is arranged inside the vehicle body frame 10 , the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
　また、フレーム壁部６６は、車両側面視で、一方の側である車両後方側に向かうに従って上方に位置するように傾斜している。
　この構成によれば、傾斜するフレーム壁部６６によって、燃料タンク４１の突出部８２を係合部８５に向けてガイドできる。このため、車体フレーム１０に対し燃料タンク４１を容易に組み付けできる。
　また、下壁８７における一方の側の端部８７ａは、一方の側に向かうに従って上方に位置するように傾斜している。
　この構成によれば、傾斜する下壁８７の端部８７ａによって、燃料タンク４１の突出部８２を係合部８５内にガイドできる。 In addition, the frame wall portion 66 is inclined so as to be positioned upward toward one side, or the rear side of the vehicle, as viewed from the side of the vehicle.
According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided toward the engaging portion 85 by the inclined frame wall portion 66 . Therefore, the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
An end portion 87a on one side of the lower wall 87 is inclined upward toward one side.
According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided into the engaging portion 85 by the end portion 87 a of the inclined lower wall 87 .
　さらに、上壁８６における一方の側の端部８６ａは、一方の側に向かうに従って上方に位置するように傾斜している。
　この構成によれば、傾斜する上壁８６の端部８６ａによって、燃料タンク４１の突出部８２を係合部８５内にガイドできる。また、上壁８６における一方の側の端部８６ａと下壁８７との間隔が広くなるため、突出部８２を係合部８５に係合させ易い。
　また、突出部８２は、車幅方向に延びる軸８１ａと、軸８１ａに回転自在に支持される係合部材８３とを備え、係合部材８３が係合部８５に係合する。
　この構成によれば、係合部材８３が車幅方向に延びる軸８１ａを中心に回転するため、係合部材８３を係合部８５に係合させ易い。 Further, one end portion 86a of the upper wall 86 is inclined upward toward the one side.
According to this configuration, the projecting portion 82 of the fuel tank 41 can be guided into the engaging portion 85 by the end portion 86 a of the inclined upper wall 86 . In addition, since the distance between the end portion 86 a on one side of the upper wall 86 and the lower wall 87 is widened, the projecting portion 82 can be easily engaged with the engaging portion 85 .
The projecting portion 82 includes a shaft 81a extending in the vehicle width direction and an engaging member 83 rotatably supported by the shaft 81a.
According to this configuration, the engaging member 83 rotates around the shaft 81 a extending in the vehicle width direction, so that the engaging member 83 can be easily engaged with the engaging portion 85 .
　また、燃料タンク４１は、燃料タンク４１の燃料が供給されるエンジン１１の後方において、車両側面視で前下がりの姿勢で配置され、フレーム壁部６６は、車両側面視において、後輪３の上方で前下がりに配置され、一方は車両後方であり、突出部８２は、燃料タンク４１の前部に設けられる。
　この構成によれば、後輪３の上方で前下がりに配置されるフレーム壁部６６に沿うように、燃料タンク４１をコンパクトに配置できる。また、燃料は、燃料タンク４１の前下がりの姿勢によって、燃料タンク４１内において前部のエンジン１１側に溜まるため、自動二輪車１のマスの集中化を図ることができる。さらに、前下がりのフレーム壁部６６に沿うように燃料タンク４１を下ろしていくと燃料タンク４１の前部に設けられる突出部８２が係合部８５に係合する。このため、車体フレーム１０の内側に燃料タンク４１が配置される構造であっても、車体フレーム１０に対し燃料タンク４１を容易に組み付けできる。 In addition, the fuel tank 41 is arranged in a forward-downward posture when viewed from the side of the vehicle behind the engine 11 to which the fuel of the fuel tank 41 is supplied, and the frame wall portion 66 is positioned above the rear wheel 3 when viewed from the side of the vehicle. , one of which is the rear of the vehicle, and the projecting portion 82 is provided in the front portion of the fuel tank 41 .
According to this configuration, the fuel tank 41 can be arranged in a compact manner along the frame wall portion 66 that is arranged above the rear wheel 3 and downwardly forward. In addition, because the fuel tank 41 is in a forward-downward posture, the fuel is accumulated on the engine 11 side in the front part of the fuel tank 41 , so mass concentration of the motorcycle 1 can be achieved. Further, when the fuel tank 41 is lowered along the frame wall portion 66 which is lowered forward, the projecting portion 82 provided at the front portion of the fuel tank 41 is engaged with the engaging portion 85 . Therefore, even in a structure in which the fuel tank 41 is arranged inside the vehicle body frame 10 , the fuel tank 41 can be easily assembled to the vehicle body frame 10 .
　なお、上記実施の形態は本発明を適用した一態様を示すものであって、本発明は上記実施の形態に限定されるものではない。
　上記実施の形態では、フレーム壁部６６は、燃料タンク４１を車両後方から覆い、縦壁８８は、車両前方側で上壁８６と下壁８７とを上下に接続し、開放部８９は車両後方側でフレーム壁部６６に向けて開放するものとして説明したが、本発明はこれに限定されない。
　例えば、燃料タンク４１を車両前方から覆うフレーム壁部を設け、縦壁８８は、車両後方側で上壁８６と下壁８７とを上下に接続し、開放部８９は車両前方側でフレーム壁部に向けて開放しても良い。この構成において、下壁８７における前端は、上壁８６における前端よりも車両前方側に延出し、下壁８７における前端とフレーム壁部との車両前後方向の距離を、突出部８２の車両前後方向の幅Ｌ２よりも小さくしても良い。
　また、上記実施の形態では、自動二輪車１を例に挙げて説明したが、本発明はこれに限定されるものではなく、本発明は、前輪または後輪を２つ備える３輪の鞍乗り型車両及び４輪以上を備える鞍乗り型車両に適用可能である。 In addition, the above-described embodiment shows one mode to which the present invention is applied, and the present invention is not limited to the above-described embodiment.
In the above embodiment, the frame wall portion 66 covers the fuel tank 41 from the rear of the vehicle, the vertical wall 88 vertically connects the upper wall 86 and the lower wall 87 on the front side of the vehicle, and the open portion 89 is located at the rear of the vehicle. Although described as opening toward the frame wall portion 66 on the side, the present invention is not limited to this.
For example, a frame wall portion is provided to cover the fuel tank 41 from the front of the vehicle. You can open it to In this configuration, the front end of the lower wall 87 extends further to the front side of the vehicle than the front end of the upper wall 86, and the distance in the vehicle front-rear direction between the front end of the lower wall 87 and the frame wall portion is the distance between the front end of the lower wall 87 and the frame wall portion. may be smaller than the width L2 of .
Further, in the above-described embodiment, the motorcycle 1 has been described as an example, but the present invention is not limited to this, and the present invention is a three-wheel saddle type motorcycle having two front wheels or two rear wheels. It is applicable to vehicles and straddle-type vehicles having four or more wheels.
［上記実施の形態によりサポートされる構成］
　上記実施の形態は、以下の構成をサポートする。 [Configuration supported by the above embodiment]
The above embodiment supports the following configurations.
　（構成１）係合部を備える車体フレームと、前記係合部に係合して支持される燃料タンクとを備える鞍乗り型車両において、前記車体フレームは、前記燃料タンクを車幅方向外側から覆う左右一対のフレーム側壁部と、前記燃料タンクを車両前方及び車両後方の一方から覆うフレーム壁部とを備え、前記係合部は、前記フレーム側壁部の内面に設けられ、前記係合部は、車両側面視で、車両前後方向に延びる上壁と、前記上壁に対向する下壁と、車両前後方向で前記一方の反対側である他方の側で車両上下方向に延びる縦壁と、前記一方の側で前記フレーム壁部に向けて開放する開放部とを備え、前記燃料タンクには、前記開放部から前記係合部内に係合する突出部が設けられ、前記下壁における前記一方の側の端は、前記上壁における前記一方の側の端よりも前記一方の側に延出し、前記下壁における前記一方の側の前記端と前記フレーム壁部との車両前後方向の距離は、前記突出部の車両前後方向の幅よりも小さいことを特徴とする鞍乗り型車両。
　この構成によれば、係合部の下壁における一方の側の端とフレーム壁部との間に燃料タンクの突出部が入り込むことが防止されるため、突出部を開放部から係合部内に容易に係合させることができる。また、下壁における一方の側の端が、上壁における一方の側の端よりも一方の側に延出するため、上壁が突出部の邪魔になり難い。このため、車体フレームの内側に燃料タンクが配置される構造であっても、車体フレームに対し燃料タンクを容易に組み付けできる。 (Arrangement 1) In a saddle-ride type vehicle comprising a vehicle body frame having an engaging portion and a fuel tank supported by being engaged with the engaging portion, the vehicle body frame is adapted to engage the fuel tank from the outside in the vehicle width direction. and a frame wall portion covering the fuel tank from one of the vehicle front side and the vehicle rear side, wherein the engaging portion is provided on the inner surface of the frame side wall portion, and the engaging portion an upper wall extending in the longitudinal direction of the vehicle in a side view of the vehicle; a lower wall facing the upper wall; an open portion that opens toward the frame wall portion on one side; the fuel tank is provided with a projecting portion that engages in the engaging portion from the open portion; The side end extends further to the one side than the one side end of the upper wall, and the distance in the vehicle front-rear direction between the one side end of the lower wall and the frame wall is A saddle-ride type vehicle, wherein the width of the projecting portion in the vehicle front-rear direction is smaller than that of the projecting portion.
According to this configuration, the projecting portion of the fuel tank is prevented from entering between one end of the lower wall of the engaging portion and the frame wall portion. It can be easily engaged. In addition, since the one-side end of the lower wall extends to one side more than the one-side end of the upper wall, the upper wall is less likely to interfere with the protrusion. Therefore, even in a structure in which the fuel tank is arranged inside the body frame, the fuel tank can be easily assembled to the body frame.
　（構成２）前記フレーム壁部は、車両側面視で、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする構成１に記載の鞍乗り型車両。
　この構成によれば、傾斜するフレーム壁部によって、燃料タンクの突出部を係合部に向けてガイドできる。このため、車体フレームに対し燃料タンクを容易に組み付けできる。 (Arrangement 2) The saddle-ride type vehicle according to Arrangement 1, wherein the frame wall portion is inclined upward toward the one side as viewed from the side of the vehicle.
According to this configuration, the projecting portion of the fuel tank can be guided toward the engaging portion by the inclined frame wall portion. Therefore, the fuel tank can be easily assembled to the vehicle body frame.
　（構成３）前記下壁における前記一方の側の端部は、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする構成１または２に記載の鞍乗り型車両。
　この構成によれば、傾斜する下壁の端部によって、燃料タンクの突出部を係合部内にガイドできる。 (Arrangement 3) The saddle-ride type vehicle according to Arrangement 1 or 2, wherein the one-side end of the lower wall is inclined upward toward the one side. .
According to this configuration, the projecting portion of the fuel tank can be guided into the engaging portion by the inclined end portion of the lower wall.
　（構成４）前記上壁における前記一方の側の端部は、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする構成１から３のいずれかに記載の鞍乗り型車両。
　この構成によれば、傾斜する上壁の端部によって、燃料タンクの突出部を係合部内にガイドできる。また、上壁における一方の側の端部と下壁との間隔が広くなるため、突出部を係合部に係合させ易い。 (Arrangement 4) The saddle according to any one of arrangements 1 to 3, wherein the one-side end of the upper wall is inclined upward toward the one side. ride-on vehicle.
According to this configuration, the projecting portion of the fuel tank can be guided into the engaging portion by the inclined end portion of the upper wall. In addition, since the distance between the one end of the upper wall and the lower wall is widened, it is easy to engage the protrusion with the engaging portion.
　（構成５）前記突出部は、車幅方向に延びる軸と、前記軸に回転自在に支持される係合部材とを備え、前記係合部材が前記係合部に係合することを特徴とする構成１から４のいずれかに記載の鞍乗り型車両。
　この構成によれば、係合部材が車幅方向に延びる軸を中心に回転するため、係合部材を係合部に係合させ易い。 (Configuration 5) The projecting portion includes a shaft extending in the vehicle width direction and an engaging member rotatably supported by the shaft, and the engaging member engages with the engaging portion. Straddle type vehicle according to any one of configurations 1 to 4.
According to this configuration, since the engaging member rotates around the axis extending in the vehicle width direction, the engaging member can be easily engaged with the engaging portion.
　（構成６）前記燃料タンクは、前記燃料タンクの燃料が供給されるエンジンの後方において、車両側面視で前下がりの姿勢で配置され、前記フレーム壁部は、車両側面視において、後輪の上方で前下がりに配置され、前記一方は車両後方であり、前記突出部は、前記燃料タンクの前部に設けられることを特徴とする構成１から５のいずれかに記載の鞍乗り型車両。
　この構成によれば、後輪の上方で前下がりに配置されるフレーム壁部に沿うように、燃料タンクをコンパクトに配置できる。また、燃料は、燃料タンクの前下がりの姿勢によって、前部のエンジン側に溜まるため、鞍乗り型車両のマスの集中化を図ることができる。さらに、前下がりのフレーム壁部に沿うように燃料タンクを下ろしていくと燃料タンクの前部に設けられる突出部が係合部に係合する。このため、車体フレームの内側に燃料タンクが配置される構造であっても、車体フレームに対し燃料タンクを容易に組み付けできる。 (Arrangement 6) The fuel tank is disposed behind the engine to which the fuel of the fuel tank is supplied, in a forward-downward posture when viewed from the side of the vehicle, and the frame wall portion is located above the rear wheels when viewed from the side of the vehicle. 6. The saddle-riding vehicle according to any one of configurations 1 to 5, wherein the one is located in the rear of the vehicle, and the projecting portion is provided in the front portion of the fuel tank.
According to this configuration, the fuel tank can be arranged compactly along the frame wall portion that is arranged above the rear wheel and downwardly forward. In addition, since fuel is accumulated on the engine side of the front portion due to the forward-downward posture of the fuel tank, the mass of the saddle-ride type vehicle can be centralized. Furthermore, when the fuel tank is lowered along the frame wall portion that is downwardly forward, the projecting portion provided at the front portion of the fuel tank is engaged with the engaging portion. Therefore, even in a structure in which the fuel tank is arranged inside the body frame, the fuel tank can be easily assembled to the body frame.
　１　自動二輪車（鞍乗り型車両）
　３　後輪
　１０　車体フレーム
　１１　エンジン
　４１　燃料タンク
　６６　フレーム壁部
　６７，６８　フレーム側壁部
　８１ａ　軸
　８２　突出部
　８３　係合部材
　８５　係合部
　８６　上壁
　８６ａ　端部（上壁における一方の側の端部）
　８６ｂ　端（上壁における一方の側の端）
　８７　下壁
　８７ａ　端部（下壁における一方の側の端部）
　８７ｂ　端（下壁における一方の側の端）
　８８　縦壁
　８９　開放部
　Ｌ１　距離
　Ｌ２　幅 1 Motorcycle (saddle type vehicle)
3 rear wheel 10 body frame 11 engine 41 fuel tank 66 frame wall portion 67, 68 frame side wall portion 81a shaft 82 projecting portion 83 engaging member 85 engaging portion 86 upper wall 86a end portion (end portion on one side of the upper wall )
86b end (end on one side of top wall)
87 bottom wall 87a end (end on one side of bottom wall)
87b end (end on one side of lower wall)
88 vertical wall 89 opening L1 distance L2 width

Claims (6)

  1. 　係合部（８５）を備える車体フレーム（１０）と、前記係合部（８５）に係合して支持される燃料タンク（４１）とを備える鞍乗り型車両において、
    　前記車体フレーム（１０）は、前記燃料タンク（４１）を車幅方向外側から覆う左右一対のフレーム側壁部（６７，６８）と、前記燃料タンク（４１）を車両前方及び車両後方の一方から覆うフレーム壁部（６６）とを備え、
    　前記係合部（８５）は、前記フレーム側壁部（６７，６８）の内面に設けられ、
    　前記係合部（８５）は、車両側面視で、車両前後方向に延びる上壁（８６）と、前記上壁（８６）に対向する下壁（８７）と、車両前後方向で前記一方の反対側である他方の側で車両上下方向に延びる縦壁（８８）と、前記一方の側で前記フレーム壁部（６６）に向けて開放する開放部（８９）とを備え、
    　前記燃料タンク（４１）には、前記開放部（８９）から前記係合部（８５）内に係合する突出部（８２）が設けられ、
    　前記下壁（８７）における前記一方の側の端（８７ｂ）は、前記上壁（８６）における前記一方の側の端（８６ｂ）よりも前記一方の側に延出し、
    　前記下壁（８７）における前記一方の側の前記端（８７ｂ）と前記フレーム壁部（６６）との車両前後方向の距離（Ｌ１）は、前記突出部（８２）の車両前後方向の幅（Ｌ２）よりも小さいことを特徴とする鞍乗り型車両。     A straddle-type vehicle comprising a vehicle body frame (10) having an engaging portion (85) and a fuel tank (41) supported by being engaged with the engaging portion (85),
    The vehicle body frame (10) includes a pair of left and right frame side wall portions (67, 68) covering the fuel tank (41) from outside in the vehicle width direction, and covers the fuel tank (41) from one of the vehicle front side and the vehicle rear side. a frame wall (66);
    The engaging portion (85) is provided on the inner surface of the frame side wall portion (67, 68),
    The engaging portion (85) includes an upper wall (86) extending in the vehicle front-rear direction, a lower wall (87) facing the upper wall (86), and an opposite wall (87) facing the upper wall (86) in the vehicle front-rear direction. a vertical wall (88) extending in the vertical direction of the vehicle on the other side, and an opening (89) that opens toward the frame wall (66) on the one side,
    The fuel tank (41) is provided with a protruding portion (82) that engages from the open portion (89) into the engaging portion (85),
    the one-side end (87b) of the lower wall (87) extends further to the one side than the one-side end (86b) of the upper wall (86);
    The distance (L1) in the vehicle front-rear direction between the one end (87b) of the lower wall (87) and the frame wall (66) is the width of the projecting portion (82) in the vehicle front-rear direction ( A straddle-type vehicle characterized by being smaller than L2).
  2. 　前記フレーム壁部（６６）は、車両側面視で、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする請求項１記載の鞍乗り型車両。 The straddle-type vehicle according to claim 1, wherein the frame wall portion (66) is inclined upward toward the one side as viewed from the side of the vehicle.
  3. 　前記下壁（８７）における前記一方の側の端部（８７ａ）は、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする請求項１または２記載の鞍乗り型車両。 The saddle-riding according to claim 1 or 2, wherein the one-side end (87a) of the lower wall (87) is inclined upward toward the one side. type vehicle.
  4. 　前記上壁（８６）における前記一方の側の端部（８６ａ）は、前記一方の側に向かうに従って上方に位置するように傾斜していることを特徴とする請求項１から３のいずれかに記載の鞍乗り型車両。 4. Any one of claims 1 to 3, wherein the one-side end (86a) of the upper wall (86) is inclined upward toward the one side. A saddle-riding vehicle as described.
  5. 　前記突出部（８２）は、車幅方向に延びる軸（８１ａ）と、前記軸（８１ａ）に回転自在に支持される係合部材（８３）とを備え、前記係合部材（８３）が前記係合部（８５）に係合することを特徴とする請求項１から４のいずれかに記載の鞍乗り型車両。 The projecting portion (82) includes a shaft (81a) extending in the vehicle width direction and an engaging member (83) rotatably supported by the shaft (81a). A straddle-type vehicle according to any one of claims 1 to 4, characterized in that it engages with an engaging portion (85).
  6. 　前記燃料タンク（４１）は、前記燃料タンク（４１）の燃料が供給されるエンジン（１１）の後方において、車両側面視で前下がりの姿勢で配置され、
    　前記フレーム壁部（６６）は、車両側面視において、後輪（３）の上方で前下がりに配置され、
    　前記一方は車両後方であり、
    　前記突出部（８２）は、前記燃料タンク（４１）の前部に設けられることを特徴とする請求項１から５のいずれかに記載の鞍乗り型車両。     The fuel tank (41) is disposed behind the engine (11) to which the fuel of the fuel tank (41) is supplied, in a forward-downward posture when viewed from the side of the vehicle,
    The frame wall portion (66) is disposed above the rear wheel (3) so as to descend forward when viewed from the side of the vehicle,
    the one is behind the vehicle,
    The straddle-type vehicle according to any one of claims 1 to 5, wherein the projecting portion (82) is provided in a front portion of the fuel tank (41).
PCT/JP2021/048969 2021-03-30 2021-12-28 Straddle-type vehicle WO2022209101A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6372290U (en) * 1986-10-31 1988-05-14
JPH06234382A (en) * 1993-02-10 1994-08-23 Yamaha Motor Co Ltd Fuel tank fitting structure for motorcycle
JPH0976972A (en) * 1995-09-11 1997-03-25 Honda Motor Co Ltd Saddle type fuel tank fitting structure
JP2005047403A (en) * 2003-07-29 2005-02-24 Honda Motor Co Ltd Fuel tank mounting structure of motorcycle
JP2006021638A (en) * 2004-07-08 2006-01-26 Yamaha Motor Co Ltd Motorcycle
JP2018086909A (en) * 2016-11-28 2018-06-07 ヤマハ発動機株式会社 Saddle-riding type vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6372290U (en) * 1986-10-31 1988-05-14
JPH06234382A (en) * 1993-02-10 1994-08-23 Yamaha Motor Co Ltd Fuel tank fitting structure for motorcycle
JPH0976972A (en) * 1995-09-11 1997-03-25 Honda Motor Co Ltd Saddle type fuel tank fitting structure
JP2005047403A (en) * 2003-07-29 2005-02-24 Honda Motor Co Ltd Fuel tank mounting structure of motorcycle
JP2006021638A (en) * 2004-07-08 2006-01-26 Yamaha Motor Co Ltd Motorcycle
JP2018086909A (en) * 2016-11-28 2018-06-07 ヤマハ発動機株式会社 Saddle-riding type vehicle

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