JP3048584B2 - Motorcycle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motorcycle in which a fuel tank and a seat are placed close to each other on a vehicle body frame.

[Conventional technology]

Some motorcycles have a fuel tank mounted on a body frame and a seat mounted close to the rear of the fuel tank.

For mounting the fuel tank and the seat, a mounting bracket is provided at the rear of the fuel tank, a seat mounting bracket is also provided at the front of the seat, the mounting bracket of the fuel tank is mounted on the vehicle body frame, and the mounting bracket of the fuel tank is mounted. The seat mounting bracket of the seat is attached to the seat.

[Problems to be solved by the invention]

The present invention relates to a motorcycle, in which a fuel tank mounting structure is simple, a seat alone can be attached and detached, and the fuel tank is rotated with a fuel tank mounting bolt as a fulcrum to open an upper part of the engine. The task is to be able to maintain the equipment.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention provides a fuel tank mounted on a main frame and a rear frame, a seat mounted near a rear portion of the fuel tank, and a rear mounting portion mounted on a rear lower portion of the fuel tank. In a motorcycle in which the bracket is fixed, the rear mounting bracket is mounted on the rear frame, and the front of the seat is mounted on the rear mounting bracket, the front mounting bracket is fixed on the front lower surface of the fuel tank and the main frame Attach the front mounting bracket to the boss formed at the front upper part of the front, form a through hole extending in the left and right width direction on the rear mounting bracket, and form a pair of left and right mounting bosses projecting upward from the pair of left and right rear frames Then, a through hole extending in the left and right width direction is formed in each mounting boss portion, and a rear side is provided via a rubber damper having a through hole between the pair of mounting boss portions. The rear mounting bracket is connected to the mounting boss by inserting the rear mounting bolt in the left and right direction through the through hole of each mounting boss, the through hole of the rubber damper, and the through hole of the rear mounting bracket. The seat mounting portion is fixed at a position behind the through hole of the rear mounting bracket, and a vertical insertion hole is formed in the seat mounting portion, and the seat mounting bracket and the seat mounting portion disposed at the front portion of the seat are provided. The seat is connected to the rear mounting bracket by inserting the mounting bolts in the up and down direction, a tank recess is formed in the front lower surface of the fuel tank, and an air cleaner is arranged in the tank recess,
The air cleaner and the lower engine body were connected via an intake passage, and a fuel hose and a breather hose were extended downward from the bottom of the fuel tank to the lower part of the vehicle body, and the extended fuel hose and the breather hose were curved and slackened. The configuration is as follows.

[Action]

According to the present invention, the rear mounting bracket is fixed to the rear portion of the fuel tank, and the rear mounting bracket is mounted on the rear frame. Since the front portion of the seat is mounted on the rear mounting bracket, since the seat is directly mounted on the fuel tank, the two are accurately aligned.

Further, when the seat is removed, the workability of removing the seat is improved because the fuel tank remains attached to the vehicle body frame.

In addition, the engine can be maintained by rotating the fuel tank with the mounting bolt of the fuel tank as a fulcrum and opening the upper part of the engine.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, reference numeral 1 denotes a motorcycle, and a front fork 4 is provided on a head pipe 3 constituting a body frame 2 of the motorcycle 1 so as to be pivotable. The front wheel 5 is supported. From the head pipe 3, a pair of left and right main frames 6
Extend rearward and downward, a rear arm bracket 7 is welded to the rear end of the main frame 6, and a pair of left and right rear frames 8 are welded to the upper part of the rear arm bracket 7 and extend obliquely upward and rearward. . A seat rail 9 is further fixed to the rear end of the rear frame 8 with bolts 10.

A rear arm 11 is pivotally supported on the rear arm bracket 7, and the rear arm 11 is supported by a rear frame 8 via a rear cushion 12.
13 are provided. An engine 14 is mounted on the pair of left and right main frames 6 and the rear arm bracket 7. A fuel tank 15 is mounted from the main frame 6 to the front of the rear frame 8, and a seat 16 is provided behind the fuel tank 15 from the rear frame 8. It is placed on the seat rail 9. The seat rail 9 is covered with a rear cowl 17 from behind the rear frame 8.

An air cleaner 18 and a carburetor 19 that constitute an intake system of the engine 14 are arranged on the front side of the fuel tank 15. A radiator 20 is provided in front of the engine 14, and is covered with a cowling 21 from the front of the head pipe 3 to the side of the engine 14.

As shown in FIGS. 2, 3 and 6, the fuel tank
15 is formed by joining an outer plate 22 and an inner plate 23 made of aluminum by welding. A tank recess 24 is formed in the fuel tank 15 with the inner plate 23 opened forward and downward, thereby securing a space for accommodating the air cleaner 18. The air cleaner 18 is arranged in the tank recess 24 having the front side of the fuel tank 15 opened and between the pair of main frames 6, and has a volume conforming to the shape of the tank recess 24 as shown in FIG. Is secured.

The suction port 18a of the suction side duct 70 provided in the air cleaner 18 is directed rearward, and the duct 70 is
5 is supported through a support hole of a sponge support 71 provided between the rear surface and the lower surface of the inner plate 23 and the upper surface of the air cleaner 18, and formed between the sponge support 71, the inner plate 23, and the air cleaner 18. The intake passage 72 opens downward. The sponge support 71 absorbs the vibrations of the fuel tank 15, the air cleaner 18, and the duct 70 to suppress the generation of vibration noise, and also prevents the intake noise from leaking to the outside. The air cleaner 18 is connected to a carburetor 19,
The carburetor 19 is connected to a cylinder 27 of the engine 14.

As shown in FIGS. 2 and 4, the inner plate of the fuel tank 15
A sensor 28 for detecting the liquid level is provided below the fuel tank 15 and a fuel cock is provided below the fuel tank 15 in the vicinity of the sensor 28.
The inside of the fuel tank 15 is connected to the inlet side of the fuel pump 31 by a fuel cock 29 and a fuel hose 30 curved in a U-shape in side and top views. The discharge side of the fuel pump 31 is connected to a carburetor 19 of the engine 14 above the fuel cock 29 via a fuel hose 32 to supply fuel. Breather 33 in fuel tank 15
A breather hose 34 is connected to the breather 33, and the fuel leaked to the breather 33 is supplied to the breather hose 34.
Thus, the air is discharged from the inside of the main frame 6 to the rear of the vehicle body. The breather hose 34 extends straight downward from the breather 33 and penetrates through the inner plate 23, and the fuel tank
Easy to assemble to 15.

As shown in FIG. 2, FIG. 4 and FIG.
The front mounting bracket 35 is fixed to the inner plate 23 on the lower surface of the front part by welding, and the mounting bracket 35 is attached to the front mounting bracket 35.
36 is tightened and fixed by a bolt 38 via a damper 37.
A front end bent portion 36a of the mounting stay 36 is formed with a boss portion 6a formed on the front upper portion of the main frame 6 through a left-right width direction front mounting bolt 39 inserted into an insertion hole of the front both end bent portion 36a. Mounted on

As shown in FIG. 2, FIG. 4 to FIG.
A rear mounting bracket 40 having a substantially cylindrical shape and flanges having a U-shaped cross section at both ends is fixed to the lower rear mounting portion 15a by welding, and the rear mounting bracket 40 projects rearward from the rear portion thereof. A sheet mounting portion 41 is formed, and an insertion hole penetrating vertically is formed in the sheet mounting portion 41, and a nut 42 is fixed below the insertion hole on the lower surface of the sheet mounting portion 41. A through hole extending in the left and right width direction is formed in the rear mounting bracket 40, and a pair of left and right mounting boss portions 8a protruding upward from the pair of right and left rear frames 8 is formed. Is formed. A rear mounting bracket 40 is provided between the pair of mounting bosses 8a via a rubber damper 43 having a through hole. As shown in the drawing, rubber dampers 43 are fixed in advance to both ends of the rear mounting bracket 40, and a cylindrical collar 44 is inserted and fixed in the through hole of the rear mounting bracket 40 and the through hole of the rubber damper 43. Is also good. The rear mounting bolts 45 are inserted in the left and right width directions through the through holes of each mounting boss 8a, the through hole of the rubber damper 43, and the through hole (collar 44) of the rear mounting bracket 40, and screwed to the nut to mount the rear side. The bracket 40 is connected to the mounting boss 8a.

Therefore, when the front mounting bolt 39 of the fuel tank 15 is removed,
With the rear mounting bolt 45 as a fulcrum, the fuel tank 15 can be easily turned upward and backward, and this rotation opens the upper part of the engine 14, thereby facilitating maintenance of the engine 14. it can. A fuel hose 30 and a breather hose 34 for fuel are connected to the fuel tank 15, but the hoses 30 and 34 extend below the vehicle body and have a slack that is curved in advance at that portion. Since the curved slack parts of the hoses 30 and 34 extend with the rotation of 15,
There is no hindrance to the rotation of the fuel tank 15.

As shown in FIGS. 2, 4, 5 and 9 to 11, the seat 16 placed behind the fuel tank 15 includes a bottom plate 46 and a cushion member 47 provided on the bottom plate 46. And so on. At the front part of the bottom plate 46 of the seat 16, two right and left mounting parts 46a protruding downward are formed, and the upper projection of the front rubber damper 48 is inserted and fixed in a mounting hole 46b opened below the mounting part 46a. ing. At the rear of the seat 16, two right and left mounting holes 46c each opening downward are formed, and upper projections of a rear rubber damper 49 are inserted and fixed to the left and right mounting holes 46c, respectively. Seat 16 is the front rubber damper
48, apply the lower surface of the rear frame 8 to the rear rubber damper.
The lower surface of 49 is placed on the seat rail 9. Further, stoppers 46e are formed on the lower surface of the bottom plate 46 of the seat 16 at the left and right ends at the center in the front-rear direction, and each stopper 46e is supported in contact with the upper surface of the rear frame 8, and each stopper 46e The edge 73a of the skin 73 coated on the surface of the rear surface 16 is prevented from coming into contact with the rear frame 8 and being worn away.

Engagement part 46d formed at the rear lower part of the bottom plate 46 of the seat 16
Is a crossbar mounted between a pair of left and right seat rails 9
It is installed over 50.

Further, a concave portion 51 which extends vertically in the front portion of the seat 16 and is substantially semicircular in bottom view is formed, and a screw shaft 52 is fixed to the bottom plate 46 on both sides of the concave portion 51 downward, and this screw shaft 52 is The seat mounting bracket 53 is fixed to the seat 16 with a nut 54 inserted through the insertion hole of the seat mounting bracket 53.

A cylindrical rubber damper 57 is mounted on the outer surface of a collar member 56 with a flange at the top and bottom. ) (Particularly, see FIG. 5). Further, a protector 55 is provided in the concave portion 51 of the seat 16 above the collar member 56 of the seat mounting bracket 53.

At the front of the seat 16, the lower end of the collar member 56 connected to the seat mounting bracket 53 is applied to the seat mounting portion 41 fixed to the rear mounting bracket 40 of the fuel tank 15, and the mounting bolt 58 is placed above the collar member 56. The seat 16 is mounted on the rear mounting bracket 40 by being screwed into the nut 42 of the seat mounting portion 41 through the rear side. A storage section 59 is provided below the seat 16.
The storage portion 59 stores the electrical components 61 such as a battery 60, a switch, and an ignition device.

As described above, in the embodiment of the present invention, the fuel tank 15
The rear mounting bracket 40 fixed to the rear of the rear frame 8 is mounted on the mounting post 8a of the rear frame 8, and the front of the seat 16 is mounted on the seat mounting portion 41 of the rear mounting placket 40. The alignment with sheet 16 is accurate.

Further, since the rear part of the fuel tank 15 and the front part of the seat 16 are each independently mounted by one mounting bolt 45, 58, the mounting structure is simple.

Further, when the seat 16 is removed, only the mounting bolt 58 needs to be removed, and the rear part of the fuel tank 15 is still mounted on the rear frame 8 with the mounting bolt 45.
The workability of removing the seat 16 is improved, and maintenance of the battery 60 and the like disposed in the storage section 59 provided below is easy.

〔The invention's effect〕

In the present invention, the front mounting bracket is fixed to the front lower surface of the fuel tank, the front mounting bracket is mounted to the boss formed at the upper front of the main frame, and the rear mounting bracket is formed with through holes extending in the left and right width directions. Then, a pair of left and right mounting bosses protruding upward from the pair of left and right rear frames is formed, a through hole extending in the left and right width direction is formed in each mounting boss, and there is a through hole between the pair of mounting bosses. A rear mounting bracket is provided via a rubber damper, and a rear mounting bolt in the left and right direction is inserted into the through hole of each mounting boss, the through hole of the rubber damper, and the through hole of the rear mounting bracket to mount the rear mounting bracket. Connected to the mounting boss, extend the fuel hose and breather hose from the bottom behind the fuel tank to the lower part of the vehicle body, and form a curved slack in the extended fuel hose and breather hose. When the front mounting bracket of charge tank removed from the boss portion, the fuel tank is rotatable state as a fulcrum side mounting bolts after the fuel tank. Therefore, the front mounting bracket of the fuel tank can be removed from the boss portion, and the fuel tank can be pivoted upward from the front and rearward with the rear mounting bolt of the fuel tank as a fulcrum,
The engine can be maintained by opening the upper part of the engine. When the fuel tank is turned upward or backward, friction due to surface contact between the rubber damper and the mounting boss portion does not cause sudden rotation of the fuel tank, thereby preventing the fuel hose and the breather hose from falling off. Further, the presence of the rubber damper can prevent transmission of vibration of the vehicle body to the fuel tank and the seat.

Further, in the present invention, the seat mounting portion is fixed at a position rearward of the through hole of the rear mounting bracket, a vertical insertion hole is formed in the seat mounting portion, and the seat mounting bracket disposed at the front portion of the seat. The seat was connected to the rear mounting bracket by inserting vertical mounting bolts through the seat mounting portion. Therefore, when the seat is removed, the workability of removing the seat is improved because the fuel tank remains attached to the vehicle body frame. Further, since the seat is mounted on the seat mounting portion of the rear mounting bracket by the mounting bolt, the fuel tank and the seat are accurately aligned, and the position is continuously maintained.

Also, a tank recess is formed on the lower front surface of the fuel tank,
An air cleaner is placed in the tank recess, the air cleaner is connected to the carburetor of the engine body that is inclined forward and downward through the intake passage, and the outlet of the fuel cock provided at the lower part of the fuel tank is connected to the inlet of the fuel pump. At the same time, the discharge side of the fuel pump was connected to a carburetor above the fuel cock. Therefore, the air cleaner is disposed in the tank recess, and the air cleaner can be disposed above the carburetor of the engine body inclined forward, so that the intake passage is connected in the vertical direction, and the air-fuel mixture is easily sucked, and the intake inertia is reduced. , The engine output can be improved.

In addition, since the rear part of the fuel tank and the front part of the seat are separately mounted, the mounting structure is simple.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention.
The figure is a sectional view showing the mounting structure of the fuel tank and the seat, and FIG.
Fig. 3 is a sectional view taken along the line III-III of Fig. 2, Fig. 4 is a plan view of Fig. 2, Fig. 5 is a sectional view taken along line VV of Fig. 4, Fig. 6 is a bottom view of the fuel tank, Fig. Is a plan view of the rear part of the fuel tank, and FIG.
The figure is a view from the direction A in FIG. 7, FIG. 9 is a sectional view of the sheet, FIG. 10 is a sectional view taken along line XX of FIG. 9, and FIG. 11 is a bottom view of the sheet. In the drawing, reference numeral 1 is a motorcycle, 6 is a main frame, 6a is a boss, 8 is a rear frame, 8a is a mounting boss, 15 is a fuel tank, 16 is a seat, 18 is an air cleaner, 24 is a tank recess, 30 32 is a fuel hose, 34 is a breather hose, 35 is a front mounting bracket, 40 is a rear mounting bracket, 41 is a seat mounting part, 43 is a rubber damper, 45 is a rear mounting bolt, 51 is a recess, and 53 is a seat mounting bracket. And 57, a cylindrical rubber damper, and 58, a mounting bolt.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 1/12 B62J 35/00 B62J 39/00

Claims (1)

(57) [Claims] 1. A fuel tank is mounted on a main frame and a rear frame, a seat is mounted near a rear portion of the fuel tank, and a rear mounting bracket is fixed to a lower rear portion of the fuel tank. In a motorcycle in which the mounting bracket is mounted on the rear frame and the front of the seat is mounted on the rear mounting bracket, the front mounting bracket is fixed to the lower surface of the front of the fuel tank, and the boss formed on the upper front of the main frame Attach the front mounting bracket to the part, form a through hole extending in the left and right width direction on the rear mounting bracket, form a pair of left and right mounting bosses projecting upward from a pair of left and right rear frames, and A rear mounting bracket is provided through a rubber damper with a through hole between a pair of mounting bosses. Insert the rear mounting bolt in the left and right direction through the through hole of the boss, the through hole of the rubber damper, and the through hole of the rear mounting bracket, and connect the rear mounting bracket to the mounting boss. Also secure the seat mounting part at the rear position, form a vertical insertion hole in the seat mounting part, and insert the vertical mounting bolt through the seat mounting bracket and the seat mounting part arranged at the front part of the seat. The seat is connected to the rear mounting bracket, a tank recess is formed on the front lower surface of the fuel tank, an air cleaner is arranged in the tank recess, and the air cleaner is connected to the carburetor of the engine body that leans forward with the intake passage. The outlet of the fuel cock provided at the lower part of the fuel tank is connected to the inlet of the fuel pump, and the discharge side of the fuel pump is connected to a carburetor above the fuel cock. When the fuel hose and breather hose are extended downward from the bottom of the vehicle, the bent fuel hose and breather hose form a slack, and when the front mounting bracket of the fuel tank is removed from the boss, the fuel A motorcycle, wherein the fuel tank is rotatable around a rear mounting bolt of the tank.