JPH03186492A - Scooter type motorcycle - Google Patents

Abstract

PURPOSE:To improve the rigidity of a vehicle body and expand a storage space of auxiliary apparatuses by forming the storage space surrounded by side frames into a frame shape below a seat in a scooter type motorcycle with a unit swing type engine below the seat. CONSTITUTION:Side frames 9, 9 are formed widely in the vertical direction, they are connected to a rear frame 13 at rear end sections, a frame structure is formed with a frame 11 and the rear frame 13, and an opening section S is formed at the inside. Various auxiliary apparatuses such as an oil tank, a storage box 38 and a fuel tank 39 are arranged in this space partially overlappingly on the side frames 9, 9 in the side view. The storage space of the auxiliary apparatuses can be expanded, and rigidity can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a scooter type motorcycle equipped with a unit swing type engine below a seat 1.

(Prior Art) This type of scooter type motorcycle has a step portion located at the rear of the head pipe and the talker, and a pair of left and right seat rail frames extend from the step portion. This seat rail frame rises diagonally upward toward the rear from the step portion, and extends rearward from there in a substantially horizontal manner.A seat or the like is provided above the seat rail frame, and the seat rail A unit swing type engine is installed below the frame. and,
The seat rail frame, unit swing type engine, etc. are covered by a body cover (see, for example, Japanese Patent Laid-Open No. 114774/1983).

However, in the conventional scooter type motorcycle having the above configuration, a seal is installed to avoid interference with the unit swing type engine and auxiliary equipment installed integrally therewith.
- Since the rail frame has a downwardly bent shape, it becomes longer and heavier, which impedes efforts to reduce the weight and lower the center of gravity of the vehicle body.

Furthermore, since it is located on the inside F of the seat rail frame or the body cover, this results in a narrowing of the effective space within the body cover. For this reason, it is especially difficult to secure storage space for helmets.

Therefore, the present applicant moved the left and right pair of side frames rearward from the step portion located at the rear and lower part of the head pipe *il'! A proposal was made earlier to extend the area in a linear manner.

(Problem to be solved by the invention) However, in the above case, the pair of left and right side frames were each formed independently, and because they were connected to each other at the step portion via fasteners such as bolts, Consideration must be given to ensuring the rigidity of the connecting part located in the center.

The present invention has been made in view of the above-mentioned problems, and its 1j purpose is to provide a scooter-type motorcycle that can secure a large storage space for auxiliary equipment while maintaining high rigidity of the vehicle body. It is in.

(Means for Solving Problem A) In order to achieve the above object, the present invention includes a unit swing type engine below the seat, and a pair of left and right sides extending rearward from a step portion located below the rear of the head pipe. In a scooter type motorcycle having a frame, an opening is formed below the seat and inside the side frame, and one side frame has a frame structure surrounding the opening. Its feature is that various auxiliary devices are placed overlapping the side frames (function).According to Ki 51 Akira, the left and right side frames constitute a frame structure, so their rigidity is high, and the car body The overall rigidity also increases. Furthermore, in the opening formed inside the side frame constituting this frame structure, various auxiliary equipment are arranged so as to overlap the side frame when viewed from the side, so a large storage space is required for the auxiliary equipment. Something comes up.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side view of a scooter type motorcycle according to the present invention;
Fig. 2 is a partial plan view of the motorcycle, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 4 is a sectional view taken along IV-IVfi in Fig. FIG. 6 is a perspective view taken in the direction of view A, FIG. 6 is a view taken in the direction of arrow B in FIG. 1, FIG. 7 is a cross section taken along the line ■-■ in FIG. The sectional view, FIG. 9, is a sectional view taken along the line IX-IX in FIG. 1.

In the scooter type motorcycle 1 shown in FIG. 1, 2 is a head pipe located at the front of the vehicle body, and a steering shaft (not shown) is inserted into the head pipe 2. A handle 3 is attached to the -L end of this steering shaft, and a front wheel 4 is attached to the F end.
A front wheel 5 is rotatably supported at the lower end of the front wheel 4. The front part of the vehicle body is covered with a front cover 6 made of resin.

By the way, the spatula I/vibe 2 and the down frame 7 extending obliquely backward and downward from the head pipe 2 are integrally molded by casting, and the down frame 7 is integrally formed with the down frame 7 by casting.
As shown in the figure 4 [M], it is formed to be wider downward. And the L half part 7 of this town frame 7
A is covered by the front cover 6, or the F half part 7b is exposed to the outside, and the part of the face 7b-1 forms a design surface of 4. Therefore, the town frame 7 has an appearance. It forms part of the part. A plurality of openings 7e, .

Further, a step part 8 of the same width is welded to the rear end (M, bending end) of the down frame 7, and from the rear end of the step part 8, a pair of left and right side frames 9. That is, the step portion 8 extends integrally toward the step portion 8.
and the side frame 9.9 are integrally formed by aluminum casting.

An opening @8a is formed in the center of the step part 8, and a footboard 10 is laid on the upper surface of the step part 8 so as to cover the gap part 8a. Further, at the rear end of the step portion 8, a frame 11 which is continuous with the side frames 9 and 9 and has the same width is integrally erected in an arcuate shape in plan view. Note that this step part 8 includes a fifth
As shown in the figure, a plurality of reinforcing ribs 8b long in the front-rear direction
... is formed, and the lower surface of the step portion 8 is covered with an under cover 12 made of resin. and,
A storage space is formed above the undercover 12, and items can be taken in and taken out of the storage space by opening and closing the footboard IO.

Further, the side frames 9, 9 are formed wide in the vertical direction, and are arranged on the outermost side of the vehicle body to form a design surface. Both side frames 9, 9 are integrally connected at their rear ends by a carrier frame 13 which is continuous in width. Therefore, the side frames 9, 9, together with the frame 11 and the rear frame 13, form a frame structure. It consists of

Therefore, inside the both side frames 9.9, the side frames 9, 9, the frame 11 and the rear frame 1 are arranged.
3, and a cross member 14 and 15 extending horizontally between the side frames 9 crosses this opening S.

By the way, the rear frame 13C has an opening 13a as shown in FIGS. 2, 6, and 7.

13a, 13b, 13b, 13e are formed, and the outermost openings 13a, 13a are provided with direction indicator lights 16. ia
The other openings 13b, 13b, 1
Tail light 17 is attached to 3c. still,
The wiring connected to the direction indicator light 16° 16 and the tail light 17 is through the openings 13a, 13a, 13b, 13b.

13c.

On the other hand, as shown in FIG. 8, the one cross member 14 is formed integrally with the side frames 9, 9, and the external cross member 15 is constructed separately from the side frames 9, 9. As shown in Figure 9, both ends are bolted 18.1.
8 (one of which is not shown) is installed inside each of the side frames 9, 9.

As shown in FIG. 1, the front part of the unit swing type engine 19 is pivotally supported on the cross member 14, and the cross member 14 is pivotally supported by the front part of the unit swing type engine 19. member 15
It is hung on a rack.

A rear wheel 21 is attached to an output shaft (not shown) that protrudes laterally from the rear of the unit swing type engine 1g.

Details of the suspension structure of the unit swing type engine 19 will now be explained based on FIGS. 8 and 9.

As shown in FIG. 8, the cross member 14 is vertically attached to both ends by pivot brackets 22, 22 (only one shown) or bolts 23.
A rotatable pivot joint 24 is fastened to each pivot bracket 22 by bolts 25 and nuts 26. And left and right pivot joint 24.2
4 (only one is shown), a pivot shaft 27 is tightened and suspended horizontally by a nut 1-28 screwed into each end of the pivot shaft 27, and the unit swing type engine 19 is supported by this pivot shaft 27. Tip boss portion 19a
or is supported through insertion.

Further, as shown in FIG. 9, a channel-shaped cushion bracket 29 is fastened to one end side of the cross member 15 with bolts 30 and nuts 31, and the rear cushion 20 is attached to this cushion bracket 29.
-L: The end is supported by the bolt 32 and nut 33.

Note that the lower end of the reaction 20 is connected to the rear end boss portion 19b of the unit swing type engine 19, as shown in FIG.
C-connected.

By the way, the above-mentioned frame 9 constituting the frame structure.
9. One upper part of the frame 11 and the rear frame 13 is covered with a resin body cover 34, and the outer surface of the body cover 34 covers the frame 11 and the side frames as shown in FIGS. 1, 8, and 9. 9.9 constitutes a smoothly continuous surface on the outer surface. In addition, a seat 35 is disposed on the upper part of the body cover 34, and the front end of the seat 35 is rotatably connected by a hinge shaft 36.

Therefore, in this embodiment, as described above, the side frame 9
．． 9 is located on the outermost side of the heavy body and constitutes the design surface, so the pivot 1 to bracket 22, 22, pivot 1 to
The joints 24, 24, cushion bracket 29, etc. are all placed inside the two gnomes 9, 9, and are exposed to the outside! 7 will not damage the appearance of the car body. Also, a large capacity space is formed in a portion located inside the side frames 9, 9 and surrounded by the body cover 34 of the seat 1-35, and in this space, as shown in FIG. When viewed from the side from the front of the heavy body, an oil tank 37, a storage box 38, and a fuel tank 39 are stored in the side frame 9.9 so that some of them overlap. As shown in FIG. 1, the storage box 38 is attached to the seat 35 via the hinge shaft 36 at its front portion, and the bottom portion is attached to the cross member 14.
15 with bolts 40...

Further, the oil tank 37 is attached to the front surface of the storage box 38 with bolts 41, as shown in FIG. Furthermore, the fuel tank 39 is arranged in a storage box 38.
It is arranged along the shape of the storage box 38 at the rear end of the vehicle body behind the storage box 38, and as shown in FIGS. is attached and supported.

In the above embodiment, the side frames 9.9, which were conventionally constructed separately, are replaced by the frame 11 and the rear rear frame 1.
When integrally molded together with the gnome 13 by casting (-
The one-frame structure ensures high rigidity, which further increases the rigidity of the car body. Furthermore, in this embodiment, since the side frames 9, 9 and the step part 8 are integrally constructed, it is difficult to connect the side frame 9, 9 to the step part 8 using bolts, etc., which was required in the past. , it is possible to reduce the number of assemblies and the number of parts.

Further, in this embodiment, the side frames 9, 9 which are wide in the -1- and F directions are installed on the outermost side of the vehicle body, and the space formed inside the side frames 9, 9 is Since various auxiliary equipment such as the oil tank 37, storage box 38, and fuel tank 39 are arranged so as to partially overlap the side frame 9.9 when viewed from the side, it is necessary to take up a large storage space for these auxiliary equipment. I'll come.

Furthermore, the frame 9.9 has a design aspect as described above, and constitutes a part of the body cover of a conventional scooter-type motorcycle. The height of the body cover 34 or the height of the side frames 9, 9 can be reduced by the same amount, and there is also the advantage that less grease-repellent material is needed for the body cover 34.

(Effects of the Invention) As is clear from the explanation below, according to the present invention, the sheet F
In a scooter type motorcycle having a unit swing type engine on one side and a pair of left and right frames extending rearward from a step portion located at the rear and lower part of the head pipe, the lower edge of the seat is An opening is formed inside the side frame, and the side frame has a frame structure that surrounds the opening, and various auxiliary equipment are arranged so as to overlap the side frame when viewed from the side. This has the effect of increasing the storage space for auxiliary equipment while maintaining high rigidity.

[Brief explanation of drawings]

: Figure 51 is a side view of the scooter type motorcycle according to the present invention, Figure 2 is a partial plan view of the same motorcycle, Figure 3 is a sectional view taken along the line ■-■ in Figure 1, and Figure 4 is Figure 3. 5 is a perspective view taken in the direction of arrow A in FIG. 1, FIG. 6 is a view taken in the direction of arrow B in FIG. 8 is a sectional view taken along the line IX-IX in FIG. 1, and FIG. 9 is a sectional view taken along the line IX-IX in FIG. i-...Scooter as a motorcycle, 2...Head pipe, 8...Step part, 9...Side frame, 19
...Unit sink type engine, 35...Seat, 37...Oil tank, 38...Storage box,
39... Fuel tank, S... Opening.

Claims (1)

[Claims] A scooter-type motorcycle that is equipped with a unit swing type engine below the seat and has a pair of left and right side frames extending rearward from a step portion located below the rear of a head pipe, the side frames being below the seat and A scooter type characterized in that an opening is formed inside the side frame, the side frame has a frame structure surrounding the opening, and various auxiliary equipment are arranged so as to overlap the side frame in side view. Motorcycle.