JP2019014301A - Seat attachment structure of automatic two-wheeled vehicle - Google Patents

Abstract

To reduce thickness of a seat front attachment part of a tank cover to which a front part of a seat is to be attached and to provide enhanced cushioning properties.SOLUTION: A seat attachment structure of an automatic two-wheeled vehicle is a seat attachment structure of an automatic two-wheeled vehicle in which a seat front attachment part 65 to which a seat 25 is to be attached is provided at a rear portion of a fuel tank 24 arranged between a head pipe 12 and the seat 25. The fuel tank 24 is covered by a tank cover 56 fixed to the tank cover 24. The tank cover 56 is configured such that the seat front attachment part 65 is integrally formed with the cover rear portion at the center in the vehicle width direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a seat mounting structure for a motorcycle.

  There is a motorcycle with a seat that extends forward to a position where the front portion of the seat covers the rear portion of the fuel tank, such as an off-road motorcycle. In this type of motorcycle, there is known a two-wheeled vehicle including a seat front mounting structure provided so that a front part of a seat covers a rear part of a fuel tank (see Patent Document 1). In this motorcycle, a seat front mounting structure is provided on the upper surface of the fuel tank, and the front part of the seat is coupled to the fuel tank via the mounting structure and supported by the fuel tank.

JP-A-8-188187

  In patent document 1, the attachment structure which attaches a seat front part to the rear part of a fuel tank is provided. In this mounting structure, an insert nut is embedded in the wall of the fuel tank, and a fuel tank pin for mounting the front portion of the seat is screwed to the insert nut and fixed. For this reason, the fixing part of the mounting structure is an insert nut for attaching the fuel tank pin, and protrudes inward of the fuel tank. The front part of the seat is joined and the mounting part of the mounting structure to be attached, so-called seat front locking part Is constituted by a fuel tank side pin protruding above the fuel tank. Therefore, in the seat front portion mounting structure, the fixing portion and the seat front mounting portion extend in the vertical direction and overlap each other.

  On the other hand, in the structure in which the in-tank fuel pump is arranged directly under the fuel tank seat front mounting structure, the height of the upper surface of the fuel tank is increased in order to secure a gap between the fixing part of the mounting structure and the top of the fuel pump. Need to be high.

  However, when the upper surface of the fuel tank is raised, the position of the seat bottom plate is raised accordingly. When the seat bottom plate becomes high, it is necessary to make the cushion layer of the seat thin or make the whole seat high, and there is a problem that the riding comfort deteriorates.

  The present invention has been made in consideration of the above-described circumstances, and eliminates the need to vertically arrange the seat front mounting portion on the tank cover that covers the fuel tank and the cover fixing portion that fixes the tank cover to the fuel tank. An object of the present invention is to provide a seat mounting structure for a motorcycle that can increase the degree of freedom in layout and maintain a good ride comfort.

  In order to solve the above-described problems, the present invention is a seat mounting structure for a motorcycle provided with a seat front mounting portion for mounting the seat at a rear portion of a fuel tank disposed between a head pipe and a seat. The motorcycle is characterized in that the fuel tank is covered with a tank cover fixed to the fuel tank, and the tank cover is formed with the seat front mounting portion at the rear of the cover at the center in the vehicle width direction. The seat mounting structure is provided.

  The present invention provides a seat mounting structure for a motorcycle in which the thickness of the seat front mounting portion is reduced, the seat cushioning property is improved, and the riding comfort is improved.

1 is a left side view of a motorcycle showing a seat mounting structure for a motorcycle according to the present invention. FIG. 2 is an enlarged left side view of a vehicle body side upper half of the motorcycle of FIG. 1. The bird's-eye view which looked down on the motorcycle body side from the left side in the state where the seat was removed. The figure which looked up at the seat of the motorcycle from the lower left side. FIG. 3 is a longitudinal sectional view of a motorcycle cut along a vehicle body center line, and is a diagram for explaining an arrangement relationship between a fuel tank and a seat. Sectional drawing which follows the centerline of the fuel tank installed in the motorcycle. The perspective view which shows the attachment relation to the fuel tank of a tank cover. The disassembled perspective view explaining the attachment relationship to the fuel tank and tank cover of a radiator cover.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a left side view showing a motorcycle to which an embodiment of the present invention is applied, and FIG. 2 is an enlarged left side view showing a vehicle body side upper half of the motorcycle. FIG. 3 is a bird's-eye view of the motorcycle body with the seat removed from the left side. FIG. 4 is a view of a motorcycle seat viewed from the lower left side. In these drawings, expressions such as up / down, left / right, and front / rear are based on the driver (rider) at the time of boarding the vehicle.

  The motorcycle shown in this embodiment is an off-road motorcycle such as a motocrosser. In the motorcycle 10, as shown in FIGS. 1 to 3, the body frame 11 is mainly composed of a head pipe 12, a main frame 13, a center frame 14, a down frame 15, a seat frame 16 and a support frame 17. Among these, the vehicle front frame is assembled by the head pipe 12, the pair of left and right main frames 13, the pair of left and right center frames 14 and the pair of left and right down frames 15, and the pair of left and right center frames 14, the pair of left and right seat frames 16 and A vehicle rear frame is assembled by the pair of left and right support frames 17.

  A pair of left and right main frames 13 extend from the rear upper part of the head pipe 12 obliquely downward to the rear, and the upper ends of the pair of left and right center frames 14 are connected to the rear ends of the left and right main frames 13. The The left and right center frames 14 are curved from the middle and extend downward.

  The pair of left and right down frames 15 extend downward from the lower portion of the head pipe 12, branch to the left and right at the lower end, and then bend rearward and extend substantially horizontally, with the rear end being the lower end of the left and right center frames 14. Connected to the part.

  The engine 20 is mounted on the vehicle front frame so as to be surrounded by the main frame 13, the center frame 14, and the down frame 15 constituting the front half of the vehicle body frame 11. The engine 20 is a four-cycle single cylinder engine, for example. A cylinder assembly 22 including a cylinder block, a cylinder head, and a head cover is installed on the upper surface of the front portion of the engine case 21 so as to be substantially upright. An exhaust port (not shown) is opened on the front surface of the cylinder assembly 22 and an intake port (not shown) is opened on the rear surface.

  A synthetic resin fuel tank 24 is installed above the engine 20 so as to be sandwiched between the left and right main frames 13. A seat 25 extending in the longitudinal direction of the vehicle is placed on the fuel tank 24 from the upper surface to the rear ends of the left and right seat frames 16. A rear fender 26 is installed at the rear of the seat frame 16, and the rear fender 26 extends behind the seat 25. Further, an air cleaner (not shown) is disposed below the seat 25 so as to be surrounded by the seat frame 16 and a bridge-like seat stay 28, and both sides are covered with side covers 29.

  The air cleaner constitutes an engine intake system 30 together with a throttle body and a fuel injector (not shown). The engine intake system 30 is connected to an intake port (not shown) provided in the cylinder assembly 22 of the engine 20, and supplies a mixture of fuel and air into the cylinder bore of the cylinder assembly 22. An exhaust pipe 31 is connected to the exhaust port of the cylinder assembly 22. The exhaust pipe 31 is connected to an exhaust muffler 32 disposed at the rear of the vehicle, and engine exhaust is exhausted rearward and upward from the exhaust muffler 32. The exhaust pipe 31 and the exhaust muffler 32 constitute an engine exhaust system 33.

  Further, the head pipe 12 is provided with a steering mechanism 35, and the steering mechanism 35 is provided with a front fork 37 and a handle bar 38 that rotatably support the front wheel 36. A front fender 39 is attached to the front fork 37. By rotating the hand lever 38 left and right, the front wheel 36 is steered left and right via the steering mechanism 35 and the front fork 37.

  A pivot shaft 40 extending in the vehicle width direction is provided below the left and right center frames 14. The tip of the swing arm 41 is supported on the pivot shaft 40 so as to be swingable up and down. A rear wheel 44 as a driving wheel is supported at the rear end of the swing arm 41. The driving force of the engine 20 is transmitted to the rear wheel 44 via a power transmission mechanism 45 such as a chain / sprocket mechanism, so that the rear wheel 44 is driven.

  Incidentally, the pair of left and right main frames 13 constitutes a tank rail, and a fuel tank 24 is installed between the left and right main frames 16. The fuel tank 24 is made of a synthetic resin, and the upper case and the lower case are joined together and welded at the flange portion to form a box-like sealed structure. As shown in FIGS. 3, 6 and 7, the front end flange of the fuel tank 24 is fixed to a protruding rim immediately after the head pipe 12 by fastening means such as a fastening bolt 48. The rear end portion of the fuel tank 24 is fixed to the bridge 50 of the vehicle body frame 11 by a fixing belt 49. The bridge 50 of the vehicle body frame 11 is a vehicle body reinforcing member that spans between the left and right seat stems 28.

  The rear end of the fuel tank 24 is provided with a recess at the center in the vehicle width direction, and a mounting bolt 51 is fixed to the insert nut (not shown) embedded in the recess by screw connection. As shown in FIG. 7, one mounting ring of the fixing belt 49 is hooked to the mounting bolt 51, and the other mounting ring of the fixing belt 49 is hooked to a mounting hook 52 fixed to the bridge 50. In this way, the rear end portion of the fuel tank 24 is pressed and fixed to the bridge 50 side of the vehicle body frame 11 by the flexible fixing belt 49 having elasticity, and the lift of the fuel tank 24 is restricted.

  As shown in FIGS. 6 to 8, the fuel tank 24 has a fuel filler opening 54 formed at the top of the tank near the head pipe 12. The fuel filler port 54 is closed with a fuel cap 55. The fuel tank 24 extends in the longitudinal direction of the vehicle and has a box shape.

  Further, as shown in FIG. 6, the front side of the fuel tank 24 is covered from above with a tank cover 56 with the fuel filler port 54 exposed. The tank cover 56 has a design and is made of resin. As shown in FIG. 7, the tank cover 56 is fixed to the fuel tank 24 at four locations, front, rear, left and right. The front portion of the tank cover 56 is fixed to the front portion of the fuel tank 24 by fastening means 57 at two locations on the left and right. The rear end portion of the tank cover 56 is fixed to the middle portion of the fuel tank 24 from above by fastening means 58 from two places on the left and right. Thus, the left and right front and rear fastening means 57 and 58 for fixing the tank cover 56 to the fuel tank 24 are constituted by fastening bolts and nuts. The nuts of the fastening means 57 and 58 are insert nuts embedded in the left and right walls of the fuel tank 24, respectively.

  Further, as shown in FIGS. 3 and 8, the fastening means 57, 58 at the four front and rear, left and right positions of the tank cover 56 fix the top side front part and the middle part of the radiator cover 60 forming a left and right pair, respectively. The fastening means 57 and 58 of the tank cover 56 fix the top part side front part and the intermediate part of the radiator cover 60 at two places on the left and right sides at two places on the front and rear. For this reason, the tank cover 56 and the left and right radiator covers 60 are fastened to the fuel tank 24 at four locations, front and rear, right and left, by fastening means 57 and 58, respectively. The top side rear ends of the left and right radiator covers 60 are bolted to the front ends of the seat frame 16 with fastening bolts 59 and fixed.

  In this way, the left and right radiator covers 60 are fixed to the fuel tank 24 and the seat frame 16 by bolting the top side at three locations on the front and rear sides. As shown in FIGS. 3 and 8, the sides of the left and right radiator covers 60 are fixed to the sides of the radiator 61 (attached to the down frame 15), and the rear side of the radiator cover 60 is the lower part of the main frame 13. Then, it is fixed to the mounting bracket 62 with bolts.

  Further, the tank cover 56 covers the front half of the fuel tank 24 from above, and the tank cover 56 is inclined with a step in the middle obliquely rearward and downwardly following the shape of the upper surface of the fuel tank 24. The rear end of the tank cover 56 is terminated at a middle portion in the longitudinal direction of the fuel tank 24. Further, as shown in FIGS. 3 and 7, a stepped portion that is one step lower is formed on the rear end side from the longitudinal middle portion of the tank cover 56, and a seat front mounting means is provided at the center of the stepped portion in the vehicle width direction. 65 is provided. The seat front mounting means 65 constitutes a seat front mounting portion that is a so-called seat locking portion, and has a hook receiving structure for mounting the front portion of the seat 25.

  On the other hand, the seat 25 on which the driver (rider) is seated is shown in FIGS. The seat 25 is provided with a cushion layer 67 such as urethane foam on a synthetic resin seat bottom plate 66, and the outer surface of the cushion layer 67 is covered with an outer skin 68 so that the seat 25 is elongated in the longitudinal direction of the vehicle. . The seat 25 is installed so that the front portion covers the rear portion of the tank cover 56, and the rear portion of the seat 25 extends to the rear end portion of the seat frame 16 and is fixed to the seat frame 16.

  As shown in FIGS. 4 and 5, the seat bottom plate 66 is integrally provided with a front hook 70 as a so-called engagement hook that protrudes forward in an L shape at the front center portion in the vehicle width direction. . A central hook 71 protrudes forward in an L shape at two locations on the left and right in the middle portion in the longitudinal direction of the seat bottom plate 66 and is integrally provided. A mounting bracket 72 is fixed to the rear portion of the seat bottom plate 66 at two locations on the left and right. The

  The front hook 70 of the seat bottom plate 66 is inserted and attached to the seat receiver 75 of the seat front attachment portion 65 of the tank cover 56. In the middle portion of the seat bottom plate 66, left and right center hooks 71 are attached to a seat center fixing portion 76 constituting a hook receiver in the front portion of the seat frame 16 shown in FIG. 3, and left and right mounting brackets 72 are seat frames in the seat rear portion. 16 is fixed to the rear fixing portion 77 by screwing. Therefore, the seat 25 of the motorcycle 10 is attached at one position in the front part of the seat, two left and right parts in the middle part, and two right and left parts in the rear part. A seat front mounting portion 65 for mounting a front hook (see FIG. 4) of the seat 25 is provided at the rear end portion of the tank cover 56 at the center in the vehicle width direction. The tank cover 56 is fixed to the fuel tank 24 by fastening means 58 at the left and right rear sides near the seat front mounting portion 65. Therefore, the seat front mounting portion 65 of the tank cover 56 to which the front portion of the seat 25 is attached and the left and right cover fixing portions for fixing the seat front mounting portion 65 to the fuel tank 24 are overlapped in the vertical direction. Not provided. The tank cover 56 is fixed to the fuel tank 24 by fastening means 57 and 58 at four right and left front and rear cover fixing portions surrounding the seat front portion mounting portion 65.

  The seat front mounting portion 65 of the tank cover 56 is formed with a hook receiver 75 that receives the front hook 70 of the seat 25 by sliding it forward as shown in FIGS. The hook receiver 75 has a hook receiving opening between the front end of the seat cover 56 and the tank top surface of the fuel tank 24, and the hook receiver 75 is formed with a notch 78 so as to be recessed backward from the hook receiving opening. Yes. Further, the seat front mounting portion 65 is provided with a U-shaped or U-shaped notch 79 that opens rearward from the hook receiver 75 toward the rear of the vehicle, and the left and right edges of the notch 79 are provided. A rib extending in the longitudinal direction is formed. The seat front mounting portion 65 is reinforced by the ribs to improve rigidity, and also has a function of guiding the front hook 70 of the seat 25 to the seat front mounting portion 65.

  Further, as shown in FIGS. 5 and 6, the fuel tank 24 is provided with a fuel pump 80 inside the tank immediately below where the seat front mounting portion 65 of the tank cover 56 is provided. The fuel pump 80 is an in-tank type and is arranged to rise vertically to the bottom of the fuel tank 24. The in-tank fuel pump 80 is inserted into the tank from below the fuel tank 24, and is fixed upright by being fastened to the bottom of the tank by a fastening means such as a bolt.

  The in-tank type fuel pump 80 is disposed at the rear part in the fuel tank 24 avoiding the fuel supply port 54 so as not to collide with a nozzle of a fuel supply device (not shown) during fuel supply, and the seat front mounting part 65 of the tank cover 56. It is located substantially below.

  The rear part of the conventional fuel tank is covered with the front part of the seat, and the upper surface of the rear part of the fuel tank is inclined downwardly. For this reason, the fuel tank has a lower tank internal height at the rear of the tank, making it difficult to secure the space for the in-tank fuel pump. In addition, the front part of the seat extends to the vicinity of the fuel filler port of the fuel tank, and the insert nut for fixing the attachment part to which the engagement hook on the front part of the seat is attached and the fixing part are below the attachment part of the engagement hook. It protrudes inside. For this reason, as shown in JP-A-2006-182867, in the structure in which the in-tank type fuel pump is arranged in the fuel tank immediately below the engagement hook (seat mounting portion), the top portion of the fuel pump and the engagement hook It is necessary to dispose the insert nut for fixing the mounting portion to which the screw is attached and the fixing portion so as not to interfere with the gap. However, since the engaging hook mounting portion and the tank fixing portion are arranged so as to overlap each other, in the in-tank fuel pump arrangement structure, the hook mounting portion of the engaging hook is arranged at a sufficiently high position in the front portion of the seat. As a result, the urethane foam layer of the sheet becomes thin.

  On the other hand, in the present embodiment, the seat front mounting portion 65 of the tank cover 56 for mounting the front hook 70 of the seat 25 is provided at the rear portion of the fuel tank 24 made of synthetic resin. It is fixed to the top side of the fuel tank 24 by four cover fixing portions on the left and right front and rear. Moreover, the seat front mounting portion 65 at the rear end portion of the tank cover 56 is not provided with a cover fixing portion for the fuel tank 24 immediately below it. Fastening means 58 (of the cover fixing portion) for fixing the seat cover 56 to the fuel tank 24 is provided at different positions on the left and right sides of the fuel tank 24 behind the seat front mounting portion 65. Accordingly, the seat front mounting portion 65 of the tank cover 56 and the left and right cover fixing portions of the fuel tank 24 are installed at different positions, and the cover fixing portion is provided so as to overlap directly below the seat front mounting portion 65. It will never be done. Moreover, the seat front mounting portion 65 of the tank cover 56 is not provided so as to protrude into the fuel tank 24, and a sufficient gap is provided between the pump top of the in-tank fuel pump 80 and the tank top of the fuel tank 24. Can be secured.

  Further, the tank cover 56 exposed from the fuel supply port 54 covers the fuel tank 24, and the fuel cover 24 is directly below the seat front mounting portion 65 of the seat cover 56 to which the front hook 70 of the seat 25, so-called engagement hook is attached. There is no need to provide a cover fixing portion protruding into the tank 24. For this reason, even if the in-tank fuel pump 80 is disposed in the fuel tank 24, a gap between the pump top and the tank top of the fuel tank 24 can be secured.

  Moreover, the tank cover 56 is made of synthetic resin and integrally formed with the seat front mounting portion 65 for mounting the front hook 70 of the seat 25, so that a dedicated mounting component is not required for mounting the seat front portion. Therefore, a dedicated mounting part for mounting the seat 25 is not required, and the cost can be reduced. In addition, since it is not necessary to provide a cover fixing portion projecting into the fuel tank 24 directly below the seat front mounting portion 65 of the tank cover 56, the thickness of the seat front mounting portion 65 in the vertical direction is reduced. And can be thinned. For this reason, it is not necessary to increase the height of the seat 25, and the cushion layer 67 such as urethane foam of the seat 25 can be maintained at a predetermined thickness.

  That is, the seat front mounting portion 65 of the tank cover 56 to which the front portion of the seat 25 is attached is not restricted by providing a cover fixing portion that projects into the fuel tank 24 immediately below, and the tank cover 56 is attached to the fuel tank 24. The cover fixing part has a high degree of freedom in the installation position of the fastening means 58 constituting the fixing part. The fastening means 58 may be near the tank top portion of the fuel tank 24 (intermediate area in the front-rear direction) in the vicinity of the tank cover 56 near the seat front mounting portion 65.

  The seat 25 covering the rear portion of the tank cover 56 is smoothly continuous from the front portion of the tank cover 56 to the front portion of the seat 25, and the seat 25 is in front of the seat as shown in FIGS. The outer surface of the seat extends in a substantially horizontal direction in the longitudinal direction of the vehicle from the rear portion to the rear end portion.

  In addition, an off-road motorcycle such as a motocrosser shown in the present embodiment is driven by a driver (rider) frequently moving on the seat 25 back and forth. In an off-road motorcycle, the tank cover 56 and the seat 25 are smoothly continuous without causing a step between the tank cover 56 and the seat 25 so that the driver (rider) can easily move his / her weight back and forth on the seat 25. Formed on the surface.

  Furthermore, in the present embodiment that employs a structure in which the in-tank type fuel pump 80 is installed in the fuel tank 24, it is not necessary to provide a cover fixing portion to be attached to the fuel tank 24 immediately below the seat front portion attaching portion 65. A sufficient clearance is secured between the top of the pump 80 and the inner surface of the fuel tank 24. In addition, the tank cover 56 does not need to increase the height of the front portion of the seat 25 because the seat front attachment portion 65 does not need to be thickened in the vertical direction. Therefore, the thickness of the cushion layer 67 of the seat 25, particularly the thickness of the cushion layer in the front portion of the seat 25, can be sufficiently maintained.

  In addition, since the fixing of the seat front mounting portion 65 to the fuel tank 24 is also used as the fixing of the tank cover 56, there is a high degree of freedom in the location of the fixing portion. Since the tank cover 56 is not restricted in the arrangement of providing a cover fixing portion directly below the seat front mounting portion 65, interference between the fuel pump 80 disposed between the seat front mounting portion 65 and the fuel tank 24 is avoided. Can be easily done. Moreover, on the fuel tank 24, the height of the front portion of the seat 25 attached to the seat front attachment portion 65 of the tank cover 56 can be formed low, and the riding comfort can be improved.

  In the off-road motorcycle according to the present embodiment, the tank cover 56 and the left and right radiators are provided at four cover fixing portions in the front, rear, left, and right sides of the fuel tank 24 using fastening means 57 and 58 that restrict the lift of the seat 25 to the tank cover 56. The top side of the cover 60 is fixed to the fuel tank 24 by fastening. The tank cover 56 is provided with a notch 79 that opens rearward from the hook receiver 75 of the seat front mounting portion 65 toward the rear of the vehicle, and a rib that extends back and forth along the left and right edges of the notch 79. Is provided to increase the strength and rigidity of the seat front mounting portion 65. Then, the seat front mounting portion 65 of the tank cover 56 is fastened by fastening means 57 and 58 at the left and right and front and rear cover fixing portions on the tank top side of the fuel tank 24 so that the seat 25 can stand up. It is fixed. Among these, the cover fixing position behind the tank cover 56 is provided on both the left and right sides of the hook receiver 75, that is, on the left and right rear sides near the seat front mounting portion 65 so as to regulate the lifting of the seat front mounting portion 65. Fixed.

  The tank cover 56 is attached to the hook receiver 75 provided on the seat front mounting portion 65 by sliding the front hook 70 of the seat 25 forward and inserting the hook 25 into the hook receiver 75. The insertion of the front hook 70 into the hook receiver 75 is guided by a notch 79 provided toward the rear of the vehicle from 75 and a rib extending back and forth along the left and right edges to facilitate assembly of the seat. .

  Further, the tank cover 56 is fixed to the fuel tank 24 by fastening means 57 and 58 at four right and left front and rear cover fixing portions, so that it receives the movement load and deformation load of the driver (rider) applied to the seat 25. Yes. The load on the tank cover 56 is dispersed and transmitted to the fuel tank 24 while the load is released by the deformation of the tank cover 56 to the fuel tank 24.

  In addition, the fuel tank 24 is covered with a tank cover 56, and four cover fixing portions on the left and right front and rear sides surrounding the seat front mounting portion 65 of the tank cover 56, and the tank cover 56 is fastened to the fuel tank 24 by fastening means 57. , 58. For this reason, since the load when the front part of the seat 25 is lifted is absorbed by the seat front part attaching part 65 of the tank cover 56, the load on the fuel tank 24 can be reduced.

  Further, the seat front mounting portion 65 of the tank cover 56 is formed on the vehicle longitudinal direction center line, that is, the vehicle width direction center portion, but the cover fixing portion of the fuel tank 24 that fixes the tank cover 56 has a vehicle width. It is provided at a position left and right apart from the center of the direction (vehicle center line). Since the cover fixing portion of the fuel tank 24 is disposed at a position left and right away from the center in the vehicle width direction where the seat front mounting portion 65 is disposed, the in-tank disposed in the fuel tank 24 immediately below the seat front mounting portion. Interference between the fuel pump 80 and the cover fixing portion is eliminated, and a clearance between the pump top and the tank top of the fuel tank 24 can be easily secured.

  Furthermore, at the cover fixing portion of the tank cover 56 attached to the fuel tank 24, the attachment of the tank cover 56 and the attachment of the radiator cover 60 can be fastened together by the fastening means 57 and 58. The fastening means 58 between the left and right rear portions of the tank cover 56 and the top middle portion of the radiator cover 60 is covered with the front portion of the seat 25 and is not exposed to the outside. By fixing the tank cover 56 and the radiator cover 60 to the fuel tank 24 together, the mounting portions of the tank cover 56 and the radiator cover 60 are not exposed to the outside, and the appearance design is not impaired. Therefore, the design of the tank cover 56 can be improved.

  Furthermore, the tank cover 56 is made of a synthetic resin, and is integrally formed with the tank cover 56 with ribs and the like extending forward and backward along the left and right edges of the hook receiver 75 of the seat front mounting portion 65 and the notch 79. . Since an independent seat mounting component is not required for the tank cover 56, independent mounting components such as mounting nuts, bolts, and spacers to the fuel tank 24 can be reduced, and cost and weight can be reduced accordingly.

  In the embodiment of the present invention, the example in which the hook receiver for attaching the front hook of the seat is provided in the seat front attachment portion of the tank cover has been described. It may be constituted by a front hook formed at the center portion in the vehicle width direction of the cover, and may be received by a hook receiver provided at the front portion of the seat bottom plate so that the front portion of the seat is attached to the rear portion of the seat cover.

  Moreover, the embodiment of the present invention is presented as an example, and is not intended to limit the scope of the invention. These embodiments can be implemented in various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 12 ... Head pipe, 13 ... Main frame, 14 ... Center frame, 15 ... Down frame, 16 ... Seat frame, 17 ... Support frame, 20 ... Engine, 22 ... Cylinder assembly, 24 ... Fuel tank, 25 ... Seat, 28 ... Seat stay, 29 ... Side cover, 30 ... Engine intake system, 33 ... Engine exhaust system, 36 ... Front wheel, 40 ... Pivot shaft, 41 ... Swing arm, 44 ... Rear wheel, 45 ... Chain / sprocket mechanism (power transmission mechanism), 48 ... Fastening bolt, 49 ... Fixed belt, 55 ... Fuel cap, 56 ... Tank cover, 57, 58 ... Fastening means (tightening bolt / nut), 59 ... Fastening Bolt 60 ... Radiator cover 65 ... Seat front mounting part 66 ... Seat bottom plate 67 ... Cushion (Urethane foam), 68 ... skin, 70 ... front hook, 71 ... center hook, 72 ... rear mounting bracket, 75 ... hook receiver, 76 ... seat center fixing part, 77 ... rear fixing part, 79 ... notch 80 ... Fuel pump.

Claims (5)

A motorcycle seat mounting structure including a seat front mounting portion for mounting the seat on a rear portion of a fuel tank disposed between a head pipe and a seat,
The fuel tank is covered with a tank cover fixed to the fuel tank,
2. The motorcycle seat mounting structure according to claim 1, wherein the tank cover is formed integrally with the seat front mounting portion at the rear portion of the cover at the center in the vehicle width direction. 2. The seat mounting structure for a motorcycle according to claim 1, wherein the tank cover is provided with a portion fixed to a fuel tank at a distance from the left and right near the seat front mounting portion. The tank cover has a hook receiver that receives the front hook of the seat at the seat front mounting portion, and a U-shaped or U-shaped cutout that opens rearward from the hook receiver toward the rear of the vehicle. The seat mounting structure for a motorcycle according to claim 1 or 2, further comprising: The fuel tank is made of synthetic resin,
The seat mounting structure for a motorcycle according to any one of claims 1 to 3, wherein an in-tank fuel pump is disposed in a fuel tank immediately below a seat front mounting portion provided in the tank cover. 5. The tank cover that covers the fuel tank by exposing a fuel filler opening of the fuel tank, the seat front mounting portion provided at the rear portion thereof and the cover fixing portion of the fuel tank are covered by the front portion of the seat. The seat mounting structure for a motorcycle according to any one of the above.

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