JP2007216921A - Motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently ensure a capacity of a fuel tank in a motorcycle in which the fuel tank arranged at a rear side of an inclination part is supported on a vehicle body frame provided with a head pipe for steerably supporting a steering handle and a down frame having at least the inclination part extending from the head pipe to the rear downward. <P>SOLUTION: A part 28 to be fastened projected from an outer surface of the fuel tank 25 is fastened to the inclination part 14a of the down frame 14 from a side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, a fuel tank disposed at the rear of the inclined portion is provided in a vehicle body frame including a head pipe that supports the steering handle so as to be steerable and a down frame that has at least an inclined portion extending rearwardly downward from the head pipe. The present invention relates to a motorcycle to be supported.

A single down frame extending downward from the head pipe, a pair of left and right side frames joined to both sides of the intermediate portion of the down frame and extending backward and downward, and a pair of left and right sides joined to the lower end of the down frame and extending rearward A fuel tank located behind the down frame is disposed in a region surrounded by the lower frame, and the fuel tank is attached via an attachment piece integrally projecting at the center in the width direction of the front and rear surfaces of the fuel tank. A motorcycle that is supported by both lower frames is known from Patent Document 1.
Japanese Patent No. 3648898

  However, in the motorcycle disclosed in Patent Document 1, in order to avoid interference between the mounting piece projecting at the center position in the width direction of the fuel tank and the down frame disposed at the middle position in the width direction of the vehicle body. A space is provided between the front surface of the fuel tank and the down frame, and the mounting piece is coupled to the stay on the down frame side. Thus, if a space is set between the front surface of the fuel tank and the down frame, the capacity of the fuel tank is sacrificed and the space may become a dead space.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a motorcycle capable of sufficiently securing the capacity of a fuel tank.

  In order to achieve the above object, an invention according to claim 1 is directed to a vehicle body frame including a head pipe that supports a steering handle so that the steering handle can be steered, and a down frame that has at least an inclined portion extending rearwardly downward from the head pipe. In a motorcycle in which a fuel tank disposed behind the inclined portion is supported, a fastened portion protruding from the outer surface of the fuel tank is fastened to the inclined portion from the side.

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, the fuel tank projects outwardly so as to be coupled at a position offset to the left and right sides from the center in the width direction. It comprises a plurality of tank forming members each having a flange portion, and a part of the flange portion is formed as the fastened portion.

  According to a third aspect of the present invention, in addition to the configuration of the first aspect of the invention, the down frame includes the inclined portion, a rearward extending portion that extends rearward under the fuel tank, and the inclined portion. And a bent portion that smoothly connects the rear extension portion, and the fuel tank has a front surface and a lower surface facing the inclined portion and the rear extension portion of the down frame, and a bent portion of the down frame. And a fastened portion that is fastened from the side to the inclined portion, the rearward extending portion, and the bent portion protrudes from the front surface, the lower surface, and the curved surface of the fuel tank. Features.

  According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the vehicle body frame has a front end joined to both sides of an intermediate portion of the inclined portion of the down frame and a side view. Then, there is provided a pair of left and right side frames that are inclined rearward and extend rearward, and the fuel tank is disposed in a region surrounded by the down frame and the both side frames.

  According to a fifth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the fuel supply port of the fuel tank is opposite to the fastened portion with respect to the center in the width direction of the fuel tank. In the fuel tank, auxiliary equipment other than the fuel tank is disposed in the vicinity of the fuel filler opening.

  According to a sixth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a side stand disposed on one side in the left-right direction of the vehicle body frame is provided. An inclined surface facing obliquely upward is formed on an upper portion of the side surface facing the left and right sides, and a fuel filler port of the fuel tank is provided on the inclined surface.

  Furthermore, in addition to the configuration of the invention of claim 5 or 6, the invention of claim 7 is provided with an opening for facing the fuel filler opening on the side surface of the vehicle body cover between the head pipe and the passenger seat, A lid capable of closing the opening is attached to the vehicle body cover so as to be pivotable forward and open.

  The coolant reserve tank 54 of the embodiment corresponds to the auxiliary machine of the present invention, and the tank halves 26 and 27 of the embodiment correspond to the tank forming member of the present invention.

  According to the first aspect of the present invention, it is not necessary to provide a space for avoiding interference between the inclined portion of the down frame of the vehicle body frame and the fuel tank, and the front surface of the fuel tank is formed along the down frame. Therefore, the capacity of the fuel tank can be secured efficiently.

  According to the second aspect of the invention, since a part of the flange portion integrally provided so that the plurality of tank forming members constituting the fuel tank are coupled to each other is used as the fastened portion, the fuel tank is There is no need to attach a dedicated member separate from the fuel tank to be attached to the down frame to the fuel tank, which makes it possible to reduce the number of parts and eliminate the need for fixing the dedicated member to the fuel tank, thereby reducing costs. Can be planned.

  According to the third aspect of the present invention, it is possible to increase the number of fuel tanks to be attached and to firmly attach the fuel tank to the vehicle body frame.

  According to the fourth aspect of the present invention, the both sides of the fuel tank are held by the both side frames at a relatively high position to ensure the support of the fuel tank, and the fastening position to the down frame on the front surface of the fuel tank is set to the side. It is possible to set at a high position where interference with the frame does not occur, and the attachment of the fuel tank to the vehicle body frame can be made stronger.

  According to the fifth aspect of the present invention, it is possible to arrange the auxiliary equipment using the dead space and to share the opening provided in the vehicle body cover for maintenance of the fuel filler opening and the auxiliary equipment. .

  According to the sixth aspect of the present invention, it is ensured that the fuel overflows from the fuel filler port even when the vehicle body is returned to the upright state after the side stand is erected and the vehicle body is tilted and the fuel tank is fully filled. In addition, since the oil filler opening is provided on the side on which the vehicle body is inclined when the vehicle is parked by the side stand, refueling work is facilitated.

  Furthermore, according to the seventh aspect of the present invention, it is unnecessary to raise the oil supply nozzle at the time of refueling work by avoiding an increase in the position of the oil supply port, and at the same time as compared with the case where the lid opens upward. It is easy to check the fuel filler opening from the fuel tank and avoid interference with the lid of the fuel filler nozzle as much as possible, making it easier to insert the fuel filler nozzle into the fuel filler opening from the opening, making it even easier to refuel. It is possible to prevent the body cover from being contaminated with the fuel falling from the fuel nozzle when pulling out the fuel nozzle.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 7 show an embodiment of the present invention. FIG. 1 is a side view of a scooter type motorcycle, FIG. 2 is a side view of a body frame, FIG. 3 is a plan view of the body frame, and FIG. Is a partial cross-sectional view of the fuel tank taken along line 4-4 of FIG. 3, FIG. 5 is a partially cutaway plan view of the fuel tank to show the state of attachment of the fuel tank to the down frame, and FIG. 6-6 is an enlarged cross-sectional view, and FIG. 7 is a view taken in the direction of arrow 7 in FIG.

  1 to 3, the body frame F of the scooter type motorcycle can steer a front fork 11 that pivotally supports a front wheel WF and a bar-shaped steering handle 12 that is connected to the upper portion of the front fork 11. A head pipe 13 to be supported, a single down frame 14 extending rearward and downward from the head pipe 13, a lower cross pipe 15 joined at right angles to the rear end of the down frame 14 and extending left and right, and a lower cross pipe 15 A pair of left and right rear frames 16, 16 that extend rearward from both ends and support the occupant seat 20, an upper cross pipe 17 that connects between the middle portions of the rear frames 16, and the rear portions of the rear frames 16. The front end is joined to the connecting stay 18 and the down frame 14, and the rear end is inclined rearward and extends rearward in a side view. Together and a pair of left and right side frames 19 and 19 the rear end is joined to the two rear frames 16 ....

  The down frame 14 includes an inclined portion 14a extending rearward and downward from the head pipe 13, a bent portion 14b having one end connected to the lower end of the inclined portion 14a and bent backward, and connected to the other end of the bent portion 14b. And a rearward extending portion 14c extending in a single body.

  Further, the rear frame 16 has a front inclined portion 16a that extends from the left and right ends of the lower cross pipe 15 and extends rearward, and a rear that curves backward from the upper end of the front inclined portion 16a and extends rearward. The rear inclined portion 16b is inclined more gently than the front inclined portion 16a and extends rearwardly upward. Further, a bent portion 16c is formed in the rear frame 16 between the front inclined portion 16a and the rear inclined portion 16b, and the upper cross pipe 17 connects the bent portions 16c of the two rear frames 16.

  The side frames 19 are formed so that a front end is joined to an intermediate portion of the inclined portion 14a in the down frame 14 and spreads to the left and right sides, and bends and extends rearward. The rear ends are joined to gussets 21 fixed to the bent portions 16c of the rear frames 16.

  Focusing on FIG. 1, a power unit P comprising an engine E and a belt-type continuously variable transmission M that continuously transmits the power of the engine E to the rear wheel WR is vertically mounted on the body frame F. A rear cushion 22 is provided between the rear frame 16 and the power unit P so as to be able to swing. The rear cushion 22 buffers the vertical swing of the power unit P.

  A side stand 63 is rotatably supported on a bracket 62 attached to the left end of the lower cross pipe 15 in the vehicle body frame F, and a main stand 64 is rotatably attached to the lower part of the engine E. It is done.

  The vehicle body frame F supports a fuel tank 25 disposed behind the inclined portion 14a in the down frame 14, and the fuel tank 25 is formed by the down frame 14 and the side frames 19. Arranged in the enclosed area.

  Referring also to FIG. 4, the fuel tank 25 is composed of a pair of left and right tank halves 26 and 27 formed in a bowl shape, and the tank halves 26 and 27 have openings. Flange portions 26a and 27a provided integrally with both tank halves 26 and 27 so as to protrude outward from the edge portion are joined so as to overlap each other.

  The center position in the width direction of the fuel tank 25 is set on a plane C passing through the center in the width direction of the down frame 14, and the connecting surfaces of the tank halves 26 and 27, that is, the connecting surfaces of the flange portions 26a and 27a are In this embodiment, the connecting surface of the two flange portions 26a and 27a is the fuel tank in a state where it faces forward in the traveling direction of the motorcycle. The flange portions 26a and 27a are disposed at positions facing the down frame 14 from the right side.

  Incidentally, the inclined portion 14 a of the down frame 14 extends rearward and downward from the head pipe 13 in front of the fuel tank 25, and the rearward extending portion 14 c of the down frame 14 passes rearward through the lower portion of the fuel tank 25. The bent portion 14b is bent so as to smoothly connect the inclined portion 14a and the rearward extending portion 14c. A portion of the fuel tank 25 that faces the down frame 14 is formed along the down frame 14. That is, the fuel tank 25 has a front surface 25a and a lower surface 25b that face the inclined portion 14a and the rearward extension portion 14c of the down frame 14, and has a curved surface 25c that faces the bent portion 14b of the down frame 14. Formed.

  Referring also to FIG. 5, a plurality of locations along the circumferential direction of the flange portions 26a, 27a of the fuel tank 25 are opposed to the down frame 14 from one side (right side in this embodiment), and are on the side facing the down frame 14. Fastened portions 28, 29, and 30 are fastened from the side, and the fastened portion 28 protrudes from the front surface 25 a of the fuel tank 25 to be fastened to the inclined portion 14 a of the down frame 14 from the side. The fastened portion 29 protrudes from the lower surface 25b of the fuel tank 25 so as to be fastened to the rear extending portion 14c of the down frame 14 from the side, and the fastened portion 30 from the side of the bent portion 14b of the down frame 14 It protrudes from the curved surface 25c of the fuel tank 25 to be fastened.

  On the other hand, brackets 31, 32, and 33 with weld nuts are welded to the fastened portions 28 to 30, respectively, on the inclined portion 14a, the rearward extending portion 14c, and the bent portion 14b of the down frame 14, and these brackets are provided. The fastened portions 28 to 30 are fastened to 31 to 33 by bolts 34, 35 and 36, respectively.

  A fastened portion 37 is also formed in a portion of the flange portions 26a and 27a corresponding to the upper rear surface of the fuel tank 25. The fastened portion 37 has a weld nut attached to the upper cross pipe 17. The bracket 38 is fastened by a bolt 39 from the side.

  Referring again to FIG. 1, the vehicle body frame F, the front portion of the power unit P, and the fuel tank 25 are covered with a synthetic resin vehicle body cover 40 attached to the vehicle body frame F.

  The vehicle body cover 40 is formed by connecting a plurality of cover members made of synthetic resin, and includes a front cover portion 41 that covers the front portion of the head pipe 13 and the upper portion of the front wheel WF, and an occupant seated on the occupant seat 20. Leg shield parts 42 which are joined to the left and right sides of the front cover part 41 so as to cover the front part of the front cover part 41, step floor parts 43 extending rearward from the lower ends of both leg shield parts 42, and both step floors A skirt portion 44 that hangs downward from the outer edge of the portion 43..., And bulges upward from the inner edge of the step floor portions 43... And covers the down frame 14 from above. The floor tunnel portion 45 disposed between the passenger compartment seat 20 and the floor tunnel portion 45 are provided below the passenger tunnel 20 and are connected to the floor tunnel portion 45. Comprising a pair of left and right body side covers 46 ... and extending rearward Te.

  The step floor portion 43 is supported by left and right step stays 47, 47, and the front ends of these step stays 47 pass through the bent portion 14b of the down frame 14 in the left-right direction and are fixed to the down frame 14. The rear ends of both step stays 47 are joined to both ends of the lower cross pipe 15.

  The floor tunnel portion 45 is arranged from the rear of the head pipe 13 to the front lower portion of the occupant seat 20 so that the occupant seated on the occupant seat 20 straddles the floor tunnel portion 45 and is down with the fuel tank 25. It is formed so as to cover most of the frame 14.

  A front fender 49 that covers the front wheels from above is supported on the front fork 11, and a rear fender 50 that covers the rear wheels WR from above is supported on the body side covers 46. The

  A front lamp 51 is disposed at the front center of the front cover 41, and a rear lamp 52 is disposed at the rear of the body side covers 46.

  By the way, an upper part of the tank half 27 in the fuel tank 25 is provided with a fuel filler 53 located on the opposite side of the center of the fuel tank 25 in the width direction from the position where the fastened portions 28 to 30 and 37 are provided. The fuel supply port 53 is formed by a fuel supply cylinder 59 fixed to the tank half 27 of the fuel tank 25 so as to protrude upward from the upper surface of the fuel tank 25.

  A side stand 63 is arranged on one side of the body frame F in the left-right direction (left side in this embodiment), and the upper part of the side surface facing the side on which the side stand 63 is arranged in the left-right direction of the outer surface of the fuel tank 25. In this embodiment, an inclined surface 27b facing obliquely upward is formed on the upper portion of the outer surface of the tank half body 27, and the oil supply cylinder 59 forming the oil supply port 53 is fixed to the inclined surface 27b at a right angle. .

  In addition, in the vicinity of the fuel filler port 53, a cooling water reserve tank 54, which is an auxiliary device other than the fuel tank 25, is positioned behind the fuel filler port 53 using a dead space generated in the fuel filler cylinder 59. The cooling water reserve tank 54 is supported by a stay 57 provided on one side frame 19.

  An opening 55 between the head pipe 13 and the occupant seat 20 on the left side wall of the floor tunnel portion 45 of the vehicle body cover 40 faces the oil supply port 53 of the fuel tank 25 and the water injection port 58 of the cooling water reserve tank 54. The opening 55 is covered with a lid 56 that can be opened and closed.

  A fuel pump 60 is disposed so as to be positioned on the right side of the rear portion of the fuel tank 25 in a state of facing forward in the traveling direction of the motorcycle. The fuel pump 60 is a front inclined portion in the right rear frame 16. 16a is supported.

  6 and 7, a plurality of mounting bosses 66 are integrally projected on the inner surface of the floor tunnel portion 45 in front of the opening 55, and a bracket 67 is attached to the mounting bosses 66. It is done. The bracket 67 includes a flat plate portion 67a supported by the mounting bosses 66, a pair of upper and lower side plate portions 67b and 67b provided at right angles to both upper and lower ends of the flat plate portion 67a, and side plate portions 67b thereof. Are formed of a pair of upper and lower support arm portions 67c and 67c extending to the opening 55 side, and a connecting plate portion 67d connecting the tips of both support arm portions 67c.

  A hinge member 68 is rotatably supported on the bracket 67. The hinge member 68 is bent in a substantially U shape in a horizontal plane and is disposed outside the both side plates 67b ... and the support arm portions 67b ... of the bracket 67, and one end portion thereof is a support shaft 69, 69 coaxial. A pair of curved arm portions 68a, 68a rotatably supported on the side plate portions 68b, and a connecting plate portion 67d of the bracket and the lid 56 are disposed between the other ends of the curved arm portions 68a. And a connecting arm portion 68c to be connected.

  Incidentally, the opening 55 and the lid 56 are formed long along the front-rear direction of the motorcycle. The support member 70 is formed long along the longitudinal direction of the lid 56 and faces the inner surface of the lid 56. One end (front end) is fixed to the connecting plate portion 68 c of the hinge member 68, and the support member 70 is attached to a plurality of bosses 71, 71. That is, the lid 56 is rotatably supported by a bracket 67 fixed to the floor tunnel portion 45 of the vehicle body cover 40 via a hinge member 68, and the peripheral portion of the lid 56 is connected to the outer peripheral portion of the peripheral portion of the opening 55. It is possible to rotate between a position where the opening 55 is closed so as to be in contact with and a position where the opening 55 is opened by rotating to the front side of the opening 55. Thus, in order to regulate the opening position of the lid 56, the stopper 72 that abuts the flat plate portion 67 a of the bracket 67 when the lid 56 is rotated so as to open the opening 55 is bent at both sides of the hinge member 68. It is provided integrally with one of the arms 68a.

  A guide member 73 is fixed to the other end (rear end) of the support member 70 so as to form a fitting hole 74 with the support member 70, and can be fitted into the fitting hole 74. A lock pin 76 having a cap 75 attached to one end thereof is moved in the axial direction by a holder 77 fixed to a mounting portion 79 integrally provided on the inner surface of the floor tunnel portion 45 of the vehicle body cover 40 behind the opening portion 55. Held possible. In addition, a spring 78 is provided between the lock pin 76 and the holder 77 to urge the lock pin 76 in a direction in which the cap 75 is fitted into the fitting hole 74.

  By the way, the lid 56 in a state where the opening portion 55 is closed with the cap 75 fitted in the fitting hole 74 is in a locked state in which the lid 56 is prevented from rotating in the opening direction. Is released by pulling the operation cable 80 by operating a cylinder lock (not shown) attached to the head pipe 13. The operation cable 80 is configured such that the inner cable 82 is movably inserted into the outer cable 81, and the end portion of the outer cable 81 on the lock pin 76 side is a cable support fixed to the mounting portion 79. An end portion of the inner cable 82 that is fixed by the member 83 and protrudes from the outer cable 81 is connected to the other end portion of the lock pin 76. Thus, when the operation cable 80 is pulled, the lock pin 76 moves in a direction to disengage the cap 75 from the fitting hole 74 against the spring force of the spring 78, thereby opening the lid 56. be able to.

  In addition, a leaf spring 84 that is in contact with one end portion of the support member 70 fixed to the inner surface of the lid 56 in a closed state of the lid 56 is attached to the connecting plate portion 67d of the bracket 67. A spring force that urges the lid 56 to rotate in the opening direction is exhibited. Therefore, in the unlocked state in which the cap 75 is detached from the fitting hole 74, the lid 56 is slightly rotated forward by the spring force of the leaf spring 84, and the rear portion of the lid 56 is supplied during refueling and maintenance. Can be gripped and rotated forward.

  Further, when the lid 56 in the open state is rotated to the closed position, it abuts against the cap 75 at one end of the lock pin 76 biased toward the protruding side by the spring force of the spring 78, and the cap 75 is fitted into the fitting hole. The guide member 73 is provided with a guide surface 73 a for pushing the lock pin 76 to a position where the lock pin 76 is fitted.

  Next, the operation of this embodiment will be described. A single down frame 14 joined to the head pipe 13 includes an inclined portion 14a extending forward and downward from the head pipe 13 in front of the fuel tank 25, and the fuel tank 25. And a bent portion 14b that smoothly connects the inclined portion 14a and the rear extending portion 14c. The fuel tank 25 is attached to the down frame 14. Therefore, it is possible to prevent the setting of the shape of the fuel tank 25 from being restricted, and it is unnecessary to greatly change the shape of the vehicle body frame F in accordance with the change of the shape of the fuel tank 25. The fuel tank 25 can be supported by the down frame 14.

  Further, the fastened portion 28 protruding from the front surface 25a of the outer surface of the fuel tank 25 facing the inclined portion 14a of the down frame 14 is fastened from the side to the inclined portion 14a. Further, it is not necessary to make a space for avoiding interference between the fuel tanks 25, and the front surface 25a of the fuel tank 25 can be formed along the down frame 14, so that the capacity of the fuel tank 25 is efficiently secured. be able to.

  In addition, the fuel tank 25 includes a pair of tank halves 26 and 27 each having flange portions 26a and 27a projecting outward so as to be coupled at a position offset from the center in the width direction to the left and right sides. Since a part of the flange portions 26a and 27a is formed as a fastened portion 28 protruding from the front surface 25a of the fuel tank 25, a dedicated member separate from the fuel tank 25 for attaching the fuel tank 25 to the down frame 14 is provided. It is not necessary to attach to the fuel tank 25, the number of parts can be reduced, and the work for fixing the dedicated member to the fuel tank 25 is not required, and the cost can be reduced.

  The fuel tank 25 has a front surface 25a and a lower surface 25b that face the inclined portion 14a and the rearward extension portion 14c of the down frame 14, and a curved surface 25c that faces the bent portion 14b of the down frame 14, Fastened portions 29 and 30 that are fastened to the rear extending portion 14c and the bent portion 14b from the side protrude from the lower surface 25b and the curved surface 25c of the fuel tank 25, so the number of attachment points of the fuel tank 25 is increased. Thus, the fuel tank 25 can be firmly attached to the vehicle body frame F.

  In addition, the fastened portions 29 and 30 protruding from the lower surface 25 b and the saddle curved surface 25 c of the fuel tank 25 are also part of the flange portions 26 a and 27 a provided in the pair of tank halves 26 and 27 constituting the fuel tank 25. Therefore, the number of parts can be further reduced and the cost can be further reduced.

  That is, the fuel tank 25 is formed along the down frame 14, and fastened portions 28, 29, 30 is fastened to the down frame 14 from the side, so that the fastening portion is not located between the fuel tank 25 and the vehicle body frame F, and the shape of the fuel tank 25 is matched to the shape of the vehicle body frame F to the maximum. The dead space can be minimized and the tank capacity can be increased.

  Moreover, the vehicle body frame F is provided with a pair of left and right side frames 19 that are joined to both sides of the intermediate portion of the inclined portion 14a of the down frame 14 and that are inclined rearwardly and extend rearward in a side view. 25 are arranged in a region surrounded by the down frame 14 and the side frames 19... So that the fuel tank 25 is supported by holding both sides of the fuel tank 25 at the relatively high positions by the side frames 19. It is possible to set the fastening position of the front surface 25a of the fuel tank 25 to the down frame 14 (position of the fastened portion 28) at a high position so as not to cause interference with the side frames 19,. The attachment of the fuel tank 25 to the vehicle body frame F can be made stronger.

  Further, a fuel filler port 53 of the fuel tank 25 is provided in the fuel tank 25 on the side opposite to the fastened portions 28 to 30 with respect to the center in the width direction of the fuel tank 25, and other than the fuel tank 25 in the vicinity of the fuel filler port 53. Since the cooling water reserve tank 54, which is an auxiliary machine, is arranged, the cooling water reserve tank 54 can be arranged using the dead space, and maintenance of the refueling port 53 and the cooling water reserve tank 54 can be performed. Therefore, the opening 55 provided in the vehicle body cover 40 can be shared.

  A side stand 63 is disposed on the left side of the vehicle body frame F, and an inclined surface 27b facing obliquely upward is formed on an upper portion of the outer surface of the fuel tank 25 facing the side stand 63 side. 27b, after the side stand 63 is erected and the vehicle body is tilted to fill the fuel tank 25 with full tank, the fuel overflows from the fuel filler port 53 even if the vehicle body is returned to the upright state. This can be surely prevented, and the oil supply port 53 is provided on the side on which the vehicle body is inclined during parking by the side stand 63, so that the oil supply operation is facilitated.

  Further, an opening 55 is provided on the side surface of the floor tunnel portion 45 disposed between the head pipe 13 and the occupant seat 20 in the vehicle body cover 40, and the lid 55 can close the opening 55. Since 56 can be rotated forward and attached to the floor tunnel portion 45, it is unnecessary to raise the position of the refueling port 53 and to lift the refueling nozzle high during refueling work. In addition, as compared with the case where the lid 56 is opened upward, it is easier to check the fuel filler port 53 from above, and interference with the lid 56 of the fuel nozzle can be avoided as much as possible. This makes it easier to insert the oil into the fuel tank, making it even easier to refuel. Can be significantly prevent -40 soiling.

  In addition, since the cooling water reserve tank 54 is disposed behind the oil supply port 53, when the lid 56 is opened forward, the water supply work to the cooling water reserve tank 54 is facilitated, and both oil supply and water supply are performed. This will improve the workability.

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

1 is a side view of a scooter type motorcycle. FIG. It is a side view of a body frame. It is a top view of a body frame. FIG. 4 is a partial cross-sectional view of the fuel tank taken along line 4-4 of FIG. FIG. 4 is a partially cutaway plan view of the fuel tank for showing a state where the fuel tank is attached to the down frame. FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG. FIG. 7 is a view taken in the direction of arrow 7 in FIG. 6.

Explanation of symbols

12 ... Steering handle 13 ... Head pipe 14 ... Down frame 14a ... Inclined part 14b ... Curved part 14c ... Back extension part 19 ... Side frame 25 ... Fuel Tank 25a ... Fuel tank front surface 25b ... Fuel tank bottom surface 25c ... Fuel tank saddle curved surfaces 26, 27 ... Tank half members 26a, 27a as tank forming members Flange 27b ..Inclined surfaces 28, 29, 30 ... Fastened portion 53 ... Refueling port 54 ... Cooling water reserve tank 55 as an auxiliary machine ... Opening 56 ... Lid 63 ... Side stand F ... Body frame

Claims (7)

  A vehicle body frame (F) comprising a head pipe (13) that supports the steering handle (12) in a steerable manner, and a down frame (14) having at least an inclined portion (14a) extending rearwardly downward from the head pipe (13). In addition, in the motorcycle in which the fuel tank (25) disposed behind the inclined portion (14a) is supported, the fastened portion (28) protruding from the outer surface of the fuel tank (25) includes the inclined portion. A motorcycle characterized by being fastened to the side of (14a).   A plurality of tank forming members (26, 27a) each having a flange portion (26a, 27a) projecting outward so that the fuel tank (25) is coupled at a position offset to the left and right sides from the center in the width direction. The motorcycle according to claim 1, wherein a part of the flange portion (26a, 27a) is formed as the fastened portion (28).   The down frame (14) includes the inclined portion (14a), a rear extending portion (14c) extending rearward through the lower portion of the fuel tank (25), the inclined portion (14a), and the rear extending portion. A bent portion (14b) that smoothly connects the portion (14c), and the fuel tank (25) faces the inclined portion (14a) and the rearward extending portion (14c) of the down frame (14). And has a curved surface (25c) opposed to the curved portion (14b) of the down frame (14), and has the inclined portion (14a) and the rear extension portion ( 14c) and fastened portions (28 to 30) fastened from the side to the bent portion (14b) protrude from the front surface (25a), the lower surface (25b) and the curved surface (25c) of the fuel tank (25). Be done The motorcycle according to claim 1, wherein the door.   The vehicle body frame (F) has a pair of left and right side frames (19) having front ends joined to both sides of the intermediate portion of the inclined portion (14a) of the down frame (14) and inclined rearward and extending rearward in a side view. The fuel tank (25) is disposed in a region surrounded by the down frame (14) and the both side frames (19). Motorcycle.   A fuel filler port (53) of the fuel tank (25) is provided in the fuel tank (25) on the side opposite to the fastened portion (28 to 39) with respect to the center in the width direction of the fuel tank (25), The motorcycle according to any one of claims 1 to 4, wherein an auxiliary machine (54) other than the fuel tank (25) is disposed in the vicinity of the fuel filler opening (53).   The vehicle body frame (F) includes a side stand (63) disposed on one side in the left-right direction, and an upper surface of the fuel tank (25) facing the left-right side is inclined upward (see FIG. The motorcycle according to any one of claims 1 to 5, characterized in that 27b) is formed and a fuel filler opening (53) of the fuel tank (25) is provided on the inclined surface (27b).   An opening (55) is provided on the side surface of the vehicle body cover (40) between the head pipe (13) and the occupant seat (20) so as to face the fuel filler port (53), and the opening (55) is closed. The motorcycle according to claim 5 or 6, wherein the obtained lid (56) is attached to the vehicle body cover (40) so as to be able to pivot forward and open.

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