JPH0565088A - Frame structure of motor scooter - Google Patents

Abstract

PURPOSE:To provide a frame structure for a motor scooter, with which the actual capacity of a body functioning member located near the floor can be enlarged and the body frame be simplified and made light. CONSTITUTION:A motor scooter is equipped with body functioning component in the floor part 14a approx. in the center of the body, and therein protruding members 24, 25, 56, 57 consisting of rigid material located below the body functioning component are provided in front of and behind the body functioning component 51 in such an arrangement as protruding downward from body frames 22, 23 located on both sides of the body functioning component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure for a scooter type vehicle.

[0002]

2. Description of the Related Art Some scooter type vehicles are provided with a vehicle body functional component such as a fuel tank on a floor portion substantially at the center of the vehicle body and a vehicle body frame is passed under the vehicle functional component (special feature). (Kaisho 57-160785).

[0003]

However, in the above-mentioned conventional frame structure of the scooter type vehicle, since the body frame is passed through the lower position of the body, the body frame and the members such as the fuel tank are vertically arranged. Since they overlap, the volume of the fuel tank and the like is limited. In addition, the shape of the body frame itself is complicated, and its processing is troublesome.

The present invention has been made in view of the above circumstances, and provides a scooter type vehicle in which the actual volume of the vehicle body functional member located near the floor portion can be increased and the vehicle body frame can be simplified and reduced in weight. It is intended to provide a frame structure.

[0005]

In order to achieve the above object, in the present invention, the lower ends of the vehicle body functional parts provided on the floor portion in the substantially central portion of the vehicle body are located below and above the vehicle body functional parts. It is characterized in that the projecting members made of a rigid material are provided so as to project downward from the vehicle body frames existing on both sides of the vehicle body functional component.

[0006]

Since the vehicle body functional component and the vehicle body frame do not overlap each other in the vertical direction, it is possible to store even a large-capacity vehicle functional component. Further, the body frame itself does not need to be shaped to pass through a low position of the vehicle body, and the structure and weight of the body frame itself can be simplified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a scooter type motorcycle to which the present invention is applied, and FIG. 2 is a plan view thereof. In FIG. 1, reference numeral 1 is a vehicle body frame extending from the front (left side in the figure) of the vehicle body to the rear, 2 is an engine, 3 is a power transmission device, and 4 is a rear wheel (driving wheel) in which a tire 4b is mounted on a wheel 4a. Therefore, the engine 2, the power transmission device 3, and the rear wheels 4 form a power unit 5. The power unit 5 is connected to the rear portion of the vehicle body frame 1 by a link mechanism 6 so as to be vertically swingable, and
It is supported by the body frame 1 via a suspension 7.

Further, in FIG. 1, 9 is a handlebar, 10 is a front wheel in which a wheel 10a is fitted with a tire 10b, 11 is a front fork attached to the vehicle body frame 1 to support the front wheel 10, and 12 is a hinged front end. Is a seat that is openable and closable, 13 is a storage case that stores a helmet and the like that is provided under the seat 12, 15 is a vehicle body cover that covers the vehicle body frame 1 and the fuel tank, and 16 is a diagonally upper rear portion of the rear wheel 4. A rear fender that covers the battery, 17 is a battery, 18 is an oil tank, and 19 is an exhaust pipe.

The body frame 1 includes a head pipe 21.
And a down tube 22 that extends obliquely downward and rearward from the lower portion of the head pipe 21 and has its lower end bent slightly backward.
And a pipe which is connected to a portion slightly higher than the lower end of the down tube 22 and extends leftward and rightward from there to extend substantially horizontally rearward to the seat front portion, and is bent and further extends obliquely upward rearward. And a side frame 23 made of material. The side frame 23 functions as an air passage that supplies cooling air to the engine 2 and also supplies air to the air cleaner 32, as described later.

That is, the center portion of the cross pipe 24 is connected to the lower end of the down tube 22, and both ends of the cross pipe 24 extend obliquely upward and to the left and right and are connected to the side frame 23. A cross pipe 25, which is U-shaped in a front view, is connected to the rear end of the floor portion of the side frame 23.
The short pipe 2 for connection is provided at the lower end horizontal portion 25a of the cross pipe 25.
6 are attached to the left and right respectively. Short tube for connection 2
6 is communicated with the bellcon case of the engine 2 via the duct 27. The air that has entered from the air intake port 22a provided at the rear of the upper end of the down tube 22 is
The engine 2 through the cross pipe 24, the side frame 23, the cross pipe 26, the connecting short pipe 26, and the duct 27.
It is designed to flow into the bellcon case.

On the other hand, reference numeral 35 is an opening provided in the vehicle body cover 15, which is a portion serving as an air suction port to an air cleaner 32 described later. A duct 36 connected to the opening 35 is attached to the inside of the rear portion of the opening 35 of the vehicle body cover 15, and the outlet of the duct 36 is connected to a short pipe 30 for connection attached to a substantially central portion of the rear inclined portion 23a of the side frame 23. Connected. Further, another short connecting pipe 31 is provided obliquely in the lower front portion of the side frame 23 where the short connecting pipe 30 is attached (see FIG. 2), and the short connecting pipe 31 is connected via a flexible duct 41. It is connected to the air suction port of the air cleaner 32. The air cleaner 32 is composed of an air cleaner case body 43, a lid member 44, and a cleaner element interposed therebetween, and the air cleaner case body 43 attaches a bolt to the upper bracket of the power unit 5. It is fixed to the power unit 5 integrally by being attached via. The outlet of the air cleaner 32 is connected to the carburetor 5 through the duct 49.
0 and the engine 2 arranged downstream thereof.

The air entering through the opening 35 flows into the duct 36, is introduced into the side frame 23, the flexible duct 41, and the air cleaner 32 from there, and is formed inside the lid member 44 as shown by the arrow in the figure. From the dirty side through the cleaner element to the clean side inside the air cleaner case body 43 (see FIG. 2).
Then, it flows into the carburetor 50 through the duct 49, is mixed with fuel there, and is supplied to the engine 2.

As shown in FIG. 3, a flange 51a provided with a fuel tank 51 on the outer periphery thereof is provided on the floor portion 14a at the substantially central portion of the vehicle body, a bolt 52a and a nut are attached to a bracket 23b attached to the side frame 23. 5
It is fixed by 2b. The fuel tank 51 is composed of a case body 52 and a lid member 53 which is closed at the top by liquid honey. A fuel injection port 54 is provided at the rear portion of the lid member 53 and is normally closed by a plug member 55.

The fuel tank 51 is the side frame 2
3 and the down tube 22, and various members attached to the vehicle body frames 22 and 23 surround the periphery. That is, the recess 52c is formed in the lower front portion of the case main body 52 of the fuel tank 51, and the cross member 24 attached to the lower end of the down tube 22 is fitted therein. In addition, the fuel tank 51
The vertical center portion of the side portion of the fuel tank 51 is covered by the left and right side frames 23 provided outside thereof, and the front lower portion of the side portion of the fuel tank 51 is fixed by a bracket 56 attached to the side frame 23 by welding. Is covered. Further, the rear part of the fuel tank 51 is covered with the U-shaped cross pipe 25 that is fixed between the side frames 23. Further, as shown in FIG. 2, projecting portions 57 each having a triangular shape in plan view are attached to the left and right sides of the cross pipe 25 at appropriate intervals, as shown in FIG. The lower end of the down tube 22, the cross pipes 24, 25
The size of each member is determined so that the lower end of the fuel tank 51, the lower end of the bracket 56, and the lower end of the protrusion 57 are located below the lower end of the fuel tank 51. Then, the side frame 23, the cross pipes 24 and 25, the bracket 5
6, the undercover 58 is fitted into the bolts 59 provided on the left and right brackets 56 so as to cover the projection 57 from the lower side, and is tightened with the nuts 59a from the outside. Nut 61a attached to the bracket 60 of the side frame 23
It is attached to the vehicle body by being inserted into a bolt 61 which is inserted into. The bracket 5 is attached to the under cover 58.
An opening 58a is provided in the lower part of 6 so that the bracket 56 faces. In addition, the cross pipes 24, 2
Like the down tube 22 and the side frame 23, the bracket 5, the bracket 56, and the protrusion 57 are made of a highly rigid material such as steel. Further, the lower surface of the tank 51 is located above a line D representing the unevenness of the road surface connecting the bracket 56 and the protruding portion 57.

As shown in FIGS. 4 and 5, a stand 70 is attached to the lower part of the front end of the power unit 5 so as to be rotatable around a rod 71 projectingly formed on the power unit 5. The stand 70 is provided with a spring 72 stretched between an engaging portion 70a on the upper portion of the stand and a spring engaging portion 5a formed on the power unit 5 so as to be counterclockwise in the standing state and clockwise in the stored state. Are urged to rotate respectively. Further, an arcuate stopper 73 is formed on the front portion of the stand 70 so as to contact the power unit 5 when standing up and regulate the counterclockwise rotation of the stand 70. The stopper 73 is formed on the power unit 5. Recess 5b
Fits in and contacts the inner peripheral surface. Incidentally, 74 is a stop rubber provided on the stand 70, 75 is a padlock for stand lock, and 76 is a kick pedal.

In the frame structure of the scooter type vehicle having the above structure, however, the side frame 23, the cross pipes 24 and 25, and the bracket 5 attached to them are provided outside the fuel tank 51 so as to cover the fuel tank 51.
6 and the protruding portion 57 are provided, and the fuel tank does not vertically overlap the side frame 23 or the like,
The height of the floor portion 14a whose vertical height is regulated can be utilized to the maximum extent, and the fuel tank 51 having a relatively large capacity can be arranged. Further, by bending the side frame 23 itself at various points, the fuel tank 51
Since it is configured to cover the fuel tank 51 by attaching other members to the side frame 23 by welding instead of covering the fuel tank 51, the structure of the side frame 23 can be simplified, and as a result, the production can be performed. It is easy and can be made lightweight.

In the above embodiment, the fuel tank 51 has been described as an example of the vehicle body functional component provided on the floor portion 14a in the substantially central portion of the vehicle body. However, the vehicle body functional component is not limited to this, and may be, for example, a battery. Alternatively, another member such as an oil tank may be arranged.

[0018]

As described above, according to the present invention, since the vehicle body functional component and the vehicle body frame do not overlap each other in the vertical direction, it is possible to store even a large-capacity vehicle functional component. That is, it is possible to increase the storage volume of the vehicle body functional component. Further, it is not necessary to form the body frame itself into a shape that allows the lower position of the body to pass therethrough, and it is possible to achieve an excellent effect that the structure of the body frame can be simplified and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is an overall side view of a motorcycle to which the present invention has been applied.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged side view of a floor portion.

FIG. 4 is an enlarged side view of the front part of the power unit.

FIG. 5 is a side view near the main stand.

6 is a cross-sectional view of the floor portion taken along the line AA of FIG.

FIG. 7 is a sectional view of another main part of the floor part.

[Explanation of symbols]

 14a Floor part 22 Down tube (vehicle body frame) 23 Side frame (body frame) 24 Cross pipe (projecting member) 25 Cross pipe (projecting member) 51 Fuel tank (vehicle body functional component) 56 Bracket (projecting member) 57 Projection portion (projection) Element)

Claims (1)

[Claims] 1. A scooter type vehicle having a vehicle body functional component on a floor portion substantially in the center of the vehicle body, wherein protrusions made of a rigid material whose lower ends are located below the vehicle functional component before and after the vehicle functional component. A frame structure for a scooter type vehicle, wherein members are provided so as to project downward from vehicle body frames existing on both sides of a vehicle body functional component.