JPH0525713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seat mounting structure for a two-wheeled motor vehicle in which a seat is disposed above a fuel tank.

[Prior Art] A small two-wheeled motor vehicle in which a fuel tank is disposed within a body frame and a seat above the fuel tank is supported by a lid body attached to the body frame is known, for example, as disclosed in 1973. It is publicly known as shown in Japanese Patent No.-27384.

[Problems to be Solved by the Invention] In the conventional example, the seat load is released to the vehicle body frame via the lid, so the seat load is not particularly applied to the fuel tank. Although it is not necessary to take the weight of the driver into consideration when determining the strength, rigidity, etc. of the fuel tank, there is a limit to its capacity because the fuel tank is housed within the vehicle body frame.

That is, there is a problem in that the width of the left and right vehicle body frames cannot be increased by force due to the distance between the driver's legs, and therefore the capacity of the fuel tank cannot be greatly increased.

This invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to receive the seat load by the left and right seat pillar tubes, but the seat pillar tubes The present invention provides a mounting structure for a seat of a two-wheeled motor vehicle, which can increase the capacity of a fuel tank without being limited by the width of a tube, and which facilitates assembly of the fuel tank.

[Means for Solving the Problems] In order to achieve the above object, the seat mounting structure for a motorcycle of the present invention provides a seat mounting structure for a motorcycle in which a seat is disposed above a fuel tank, in which a lower part of the fuel tank is mounted. is housed between the left and right seat pillar tubes, and has an upper portion extending to the left and right beyond the upper extension line of the seat pillar tube, and the left and right seat rails connected to the upper ends of the seat pillar tubes and extending in the front-rear direction are connected to the fuel tank. A supporting member is disposed below the overhanging part of the tank and fixes the front and rear ends of the fuel tank to the front and rear connecting members of the left and right seat rails, and is attached to the upper end of the seat pillar tube and located above the fuel tank. The seat is supported via a damper between the seat and the seat bottom, and the seat can be opened and closed by a hinge provided at the front end of the seat.

[Function] When a driver straddles the seat of a two-wheeled motor vehicle and attempts to drive the two-wheeled motor vehicle, the weight of the driver is applied to the damper between the seat bottom and the support member provided at the upper end of the seat pillar tube. Most of the load is applied to the seat pillar tube through the fuel tank, and the seat load has almost no effect on the fuel tank. The upper part of the fuel tank is configured to overhang to the left and right beyond the upper extension line of the left and right seat pillar tubes, so the capacity of the fuel tank increases accordingly, and the overhang is limited to the width of the seat pillar tubes. Never. Further, left and right seat rails connected to the upper ends of the seat pillar tubes and extending in the front-rear direction are arranged below the projecting portion of the fuel tank, and the front and rear ends of the fuel tank are fixed to the front and rear connecting members of the left and right seat rails. Therefore, the fuel tank and the seat rail are integrated, making it easier to assemble and manage the dimensions of the overhang. Furthermore, the seat can be opened and closed by a hinge provided at its front end, so when refilling the fuel tank, the rear of the seat is raised upwards to expose the fuel supply port on the top of the fuel tank. Good.

[Example] An example of the present invention will be described below with reference to the drawings.

Figure 1 shows a two-wheeled motor vehicle, where 1 is a frame, 2
3 is a front fork, 3 is a steering wheel, 4 is an engine, 5 is a drive wheel, and 6 is a resin cover that covers the frame 1. The frame 1 is of an underbone type as shown in FIG. 2, and a head pipe 7 is connected to a pair of left and right main pipes 8, 8. The rear sides of these main pipes 8, 8 rise to form seat pillar tubes 9, 9, and these seat pillar tubes 9,
The upper end portion of 9 forms flat connecting piece portions 10, 10. The connecting pieces 10, 10 are welded to the inner surfaces of flat flat parts 12, 12 provided approximately in the middle of the pair of left and right seat rails 11, 11, and these seat rails 11, 11 are attached to the vehicle body. They are arranged along the front-rear direction. Further, the front sides of the seat rails 11, 11 are slightly raised, and connecting members 13a, 13b, which also serve as cross members, are horizontally suspended at the front and rear ends. A synthetic resin fuel tank 14 is disposed between the seat rails 11, 11, and the lower part of the fuel tank 14 is housed between the left and right seat pillar tubes 9, and the upper part thereof is housed between the left and right seat pillar tubes 9. are the left and right seat pillar tubes 9, 9.
It is constructed by projecting left and right from the upper extension line of
Further, flange portions 15, 15 at the front and rear ends of the fuel tank 14 are fixed to the upper surfaces of the connecting members 13a, 13b and are integrated with the seat rails 11, 11. Note that the upper surface of this fuel tank 14 protrudes above the seat rails 11, 11.

A metal support member 16 is installed between the seat rails 11, 11 so as to straddle the upper part of the fuel tank 14. As shown in FIGS. 3 and 4, this support member 16 is attached to the upper end of the seat pillar tubes 9, 9 through bolts 17, 17 and nuts 18, 18 on the outer surfaces of the flat parts 12, 12. It is fixed to the shaped connecting pieces 10, 10, and is composed of vertical arm parts 19, 19 and a strip-shaped load receiving part 20 horizontally suspended between the upper ends of these arm parts 19, 19. The seat bottom side, which will be described later, comes into contact with the upper surface of the load receiving portion 20.

On the other hand, a seat 21 is disposed on the seat rails 11, 11 so as to be located substantially above the front half of the fuel tank 14. This seat 21 is constructed by attaching a seat cover 23 via a cushion material to the upper surface of a synthetic resin seat bottom 22 whose side edges and rear edge extend downward.
The front end of 2 is attached to the front connecting member 13a via a hinge 24. Therefore, this seat 21 is pivoted so that it can be opened and closed using its front end as a pivot point and its rear end pivots upward. Furthermore, a pair of rubber dampers 25, 25 are fixed to the lower surface of the rear side of the seat bottom 22, spaced apart in the left-right direction of the vehicle body.
1 is in contact with the upper surface of the load receiving portion 20, which is the supporting member 16, in the closed state.

In this case, the lower surface of the seat bottom 22 is spaced upward from the fuel tank 14.

If configured as in this embodiment, the rubber dampers 25, 25 on the lower surface of the seat bottom 22 will be connected to the fuel tank 1.
4, the support member 16 is in contact with the load receiving portion 20 of the support member 16 located above the driver, so most of the load when the driver is seated is received by the support member 16, and therefore the seat load is carried by the support member 16 connected to the seat. It will be added to the seat pillar tubes 9, 9. Therefore, the seat load does not affect the fuel tank 14, and the shape and size of the fuel tank 14 are not subject to any particular restrictions. Moreover, since the upper part of the fuel tank is configured to protrude left and right from the left and right seat pillar tubes 9, 9, the capacity increases accordingly. Furthermore, fuel tank 1
The front and rear ends of the fuel tank 14 are securely held by the seat rails 11, 11, and the left and right projecting portions can be accurately positioned in advance, making it easy to assemble the fuel tank 14. Furthermore, when replenishing the fuel tank 14 with fuel, it is preferable to raise the rear of the seat 21 upward to expose the fuel supply port on the upper surface of the fuel tank 14.

Note that the fuel tank 14 is not limited to being made of synthetic resin.
It may be made of metal.

[Effects of the Invention] In this invention, in a motorcycle in which a seat is arranged above a fuel tank, the seat is supported via a damper between the support member provided at the upper end of the seat pillar tube and the seat bottom. Most of the driver's weight is applied to the seat pillar tube via the damper between the seat bottom and the support member installed at the upper end of the seat pillar tube, and the seat load has no effect on the fuel tank. There is almost no need to design the strength and rigidity of the fuel tank considering the weight of the driver, and the thickness etc. of the fuel tank can of course be determined freely. , the capacity of the fuel tank can be freely increased without being restricted by the seat pillar tube.

Furthermore, the left and right seat rails are arranged below the overhanging portion of the fuel tank, and the front and rear ends of the fuel tank are fixed to the front and rear connecting members of the left and right seat rails, so that the front and rear ends of the fuel tank are attached to the seat rails. As a result, the fuel tank is held securely and the left and right projecting portions can be accurately positioned in advance, making assembly of the fuel tank extremely easy.

Furthermore, the seat can be opened and closed by a hinge provided at its front end, so when refilling the fuel tank, raise the rear of the seat upwards and open the fuel supply port on the top of the fuel tank. It is best to expose it, making refueling operations extremely easy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with Fig. 1 being a side view of the motorcycle, Fig. 2 being a side view with the seat, cover, etc. removed, and Fig. 3 showing an enlarged view of the main parts. The sectional view shown in FIG. 4 is a sectional view taken along the - line in FIG. 3. 9... Seat pillar tube, 11... Seat rail, 13a, 13b... Connection member, 14...
fuel tank, 16... support member, 21... seat, 22... seat bottom, 24... hinge, 2
5...Damper.

Claims (1)

[Claims] 1 Automatic with seat placed above the fuel tank 2
In a wheeled vehicle, the lower part of the fuel tank is housed between the left and right seat pillar tubes, and the upper part extends left and right beyond the upper extension line of the seat pillar tube, and is connected to the upper end of the seat pillar tube in the longitudinal direction. Left and right seat rails extending from the fuel tank are disposed below the projecting portion of the fuel tank, the front and rear ends of the fuel tank are fixed to the front and rear connecting members of the left and right seat rails, and the front and rear ends of the fuel tank are attached to the upper end of the seat pillar tube. A two-wheeled motor vehicle, characterized in that a seat is supported via a damper between a support member located above a fuel tank and a seat bottom, and the seat can be opened and closed by a hinge provided at the front end of the seat. Seat mounting structure.