JPH03186491A - Scooter type motorcycle - Google Patents

Abstract

PURPOSE:To reduce assembling man-hours and the number of components and improve the torsional rigidity of a vehicle body by integrally molding a step section and side frames in a scooter type motorcycle mounted with a unit swing type engine below a seat. CONSTITUTION:A pair of the right and left side frames 9 are integrally molded backward from the rear end of a step section 8 by aluminum casting. The side frames 9 are formed widely in the vertical direction, and their rear sections are connected to a rear frame 13. The connection between the side frames 9 and the step section 8 is not required, assembling man-hours and the number of components can be reduced, and the torsional rigidity of a vehicle body can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of Industry-71) The present invention relates to a scooter type motorcycle equipped with a unit swing type engine on the seat F side.

(Prior Art) This type of scooter type motorcycle has a step portion at the lower rear of the head pipe, and a pair of left and right seat rail frames extend from the step portion. This sea 1
- The rail frame stands diagonally upwards toward the rear from the step part, and extends rearward from there approximately horizontally, and a seat, etc. is provided on the side of the seat rail frame, and the seat rail A swing type engine is installed in the unit 1 below the frame. and,
The seat rail frame, unit swing type engine, etc. are covered with a body cover (see, for example, Japanese Patent Laid-Open No. 57-114774).

By the way, in the conventional scooter-type double-width motor vehicle having the above-mentioned configuration, the seat rail frame is placed downward at -L in order to avoid interference with the unit swing type engine and auxiliary equipment installed integrally therewith. Because it has a curved shape, it is longer and heavier, which hinders the car body's ability to increase eaves height and lower the center of gravity.

Also, because it is located at the top inside of the seat rail frame or body cover, the effective space inside the body cover is narrowed! It is ffi. For this reason, we especially need to ensure storage space for two helmets.

Therefore, the present applicant has previously proposed that a pair of left and right side frames extend rearward in a substantially straight line from a step portion located at the lower rear of the head pipe.

(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 they were connected to each other at the step portion via fasteners such as bolts, so that +4i
Consideration must be given to securing the rigidity of the connecting portion located approximately at the center of the body, and there is a problem in that the number of parts increases as it requires work to connect the frame with bolts or the like.

The present invention has been made in view of the problem described in item L, and its first objective is to eliminate the connection between the pair of left and right sides 1 to frame, thereby reducing assembly man-hours and the number of parts. To provide a scooter type motorcycle capable of increasing the torsional rigidity of the entire vehicle body.

(Means for Solving the Problems) In order to achieve the object of the present invention, a unit is provided below the seat.
A scooter type motorcycle equipped with a Hess ink type engine and having a pair of left and right side frames extending rearward from a step section located at the lower rear of the head pipe, characterized in that the step section and the side frame are integrally molded. shall be.

(Function) According to the present invention, since the step part and the side frame are integrated, there is no need to connect the side frame to the step part using poles, etc., reducing the number of assembly parts and the number of parts. In addition to increasing the rigidity of the entire vehicle body.

(Example) Examples 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;
tjS2 figure is a partial plan view of the same motorcycle, and figure 3 is the first
Figure 4 is a sectional view taken along line ff-1'V in Figure 3, Figure 5 is a perspective view taken in the direction of arrow A in Figure 1, Figure 6 is a perspective view of Figure 1 in the direction of arrow A. A view in the direction of arrow B, FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 8 is a cross-sectional view taken along the ■-■ line in FIG. 1, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. It is Seki.

In a scooter-type motorcycle l shown in FIG. 1, a head pipe 2 is located at the front of the vehicle body, and a steering link shirt 1 (not shown) is inserted into the head pipe 2. A handle 3 is attached to the -L end of this steering link shaft, and a front fork 4 is attached to the -L end of the steering link shaft.
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.

Incidentally, the head pipe 2 and the down frame 7 extending diagonally rearward and downward from the head pipe 2 are integrally molded by casting, and the down frame 7 extends downward as shown in FIGS. 2 to 4. It is shaped wider towards the front. The upper half 7a of the down frame 7 is covered with the front cover 6, or the lower half 7b is exposed to the outside and a part of the surface 7b-1 constitutes a design surface. Therefore, the town frame 7 constitutes an external part. Incidentally, a plurality of openings 7C are formed in the upper flat part 7a of the down frame 7, and a wide convex part 7d is formed in the central part in the vertical direction.

Further, a step portion 8 having the same convergence is welded to the rear end (bending end portion) of the down frame 7, and from the rear end of the step portion 8, a pair of left and right side frames 9.9 extend rearwardly. It extends in one direction. That is, 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 portion 8, and a foot boat IO is laid on the upper surface of the step portion 8 so as to cover the opening 8a. Further, at the rear end of the step portion 8, a frame 11 which is continuous with the side frames 9 and 9 in the same direction is integrally erected so as to have an arcuate shape in plan view. As shown in FIG. 5, this step part 8 is formed with a plurality of reinforcing ribs 8b that are long in the front and back direction, and the lower surface of the step part 8 is covered with an undercover 12 made of resin. It is being said. The space above the undercover 12 is used as a storage space, and items can be taken in and out of this storage space by opening and closing the full-boat 10.

Further, the side frames 9, 9 are formed wide in the downward L direction, and are arranged on the outermost side of the heavy body to form a design surface. Both side frames 9.9 are integrally connected at their rear ends by a rear frame 13 that has the same width and continues. Therefore, the side frames 9, 9, together with the frame 11 and the rear frame 13, constitute a frame structure. are doing.

Therefore, inside the both side frames 9, 9, the side frames 9, 9. The frame 11 and the rear frame 1
3, and the opening S is surrounded by the side frames 9 and 9nl.
A cross member 14.15 crosses I.

By the way, the rear frame 13 has an opening 13a as shown in FIGS. 20, 6, and 7.

13a, 13b, 13b, 13c are formed, and the outermost openings 13a, 13a have direction indicator lights 16.16.
or attached, and 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, one of the cross members 14 is formed integrally with the side frames 9, 9 as shown in FIG. 8, and the other cross member 15 is constructed separately from the side frames 9, 9, as shown in FIG. As shown, both ends are pols 1 to 18,
18 (one not shown) is fastened to the inside of each of the side frames 9, 9.

As illustrated in FIG. Said cross member 15
is suspended.

A rear wheel 21 is attached to an output shaft (not shown) that protrudes laterally from the rear of the unit swing type engine 19.

Here, details of the suspension structure of the unit swing type engine 19 will be explained based on FIGS. 8 and 9.

As shown in No. 111, pivot brackets 1 to 22, 22 (only one shown) or bolts 23 are vertically attached to both ends of the cross member 14, and each pivot bracket 22 has a rotation It is fastened by a self-manufactured pivot joint 24, bolts 25, and nuts 1-26. And left and right pivot joint 2
4.24 (Only one side is shown) The pivot shaft 27 is horizontally tightened with a nut 28 screwed into each end of the pivot shaft 27, and the end boss of the unit swing type engine J9 is tightened by the pivot shaft 27. Part 19
A is inserted and supported.

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

By the way, the side frames 9, 9 constituting the frame structure
, the upper parts of the frame 11 and the rear frame 13 are covered with a resin body cover 34, and the outer surface of the M body cover 34 is covered with the frame 11 and the side frames 9, 9, 9, and 9, as shown in FIG. 1, FIG. 8, and FIG. A seat 1-35 is disposed on the L portion of the body cover 34, and the front end of the seat 35 is rotatably pivoted by a hinge shaft 36. It is worn.

Therefore, in this embodiment, as described above, the site room 9,
The pivot bracket 22.22, pivot joints 24, 24, and cushion flaket 29A are all located inside the frame 9.9 on both sides. These parts are placed on the outside so that they do not become exposed to the outside and spoil the appearance of the car body. Also, the inner side of the frames 9 and 9 is sillized and the sea 1-
The part surrounded by the body cover 34 below the body cover 35 has a '8'
A large space is formed, and as shown in FIG. 1, in this space, in order from the front of the vehicle body, there are an oil tank 37, a storage box 38, a fuel tank 39, and a size l-frame 9 when viewed from the side.
．． 9 is stored so that some of them overlap. As shown in FIG. 1, the storage box 38 is attached to the seat 35 via the hinge 36 at its front portion, and attached at the bottom to the cross member 14, 15 by poles 1-40. It is being

Further, the oil tank 37 is attached to the front surface of the storage box 38 by ports 1 to 41, as shown in FIG. Furthermore, the three fuel tanks are arranged in a storage box 3.
8, along the shape of the storage box 38, and as shown in FIGS. , is supported by Sokusu 38 by +1.

In the following, in this embodiment, the step part 8 and the side frame 99, which were conventionally constructed separately, are integrally formed by casting, so that the side frame 9, which was conventionally required with bolts, etc. 9 to the step portion 8 is no longer necessary, the number of assembly plates and parts can be reduced, and the rigidity of the entire vehicle body can be increased. In particular, in the main body embodiment, since the side frames 9, 9 constitute a frame structure together with the frame 11 and the rear frame 13, this ensures high rigidity, and this increases the rigidity of the vehicle body even further. In the example, -L
Since the downwardly wide side frames 9, 9 are located on the outermost side of the vehicle body, a large storage space is secured inside these frames, and within this storage space, there is a large storage space for storing the oil tank 37, helmet, etc. It becomes possible to sufficiently store the capacity storage box 38, fuel tank 39, etc.

Furthermore, the side frames 9, 9 constitute a design surface as described above, and constitute a part of the body cover of a conventional scooter type motorcycle, so the body cover of the motorcycle 1 according to the present T example is 34 or the height of the side frames 9, 9,
Another advantage is that the amount of grease-repellent material that is the material of the body cover 34 can be reduced.

(Effect of the invention) As is clear from the above explanation, according to the present invention, the sea l-
In a scooter-type motorcycle that is provided with a unit swing type engine at the bottom and has a pair of left and right side frames extending rearward from a step section located at the rear and lower part of the head pipe, the step section and the side frame are integrated. Because it was molded.

By eliminating the connection of the pair of left and right side frames to the step portion, the number of assembly steps and number of parts can be reduced, and the rigidity of the entire C1 vehicle body can be increased.

[Brief explanation of drawings]

FIG. 1 is a side view of a motorcycle according to the present invention;
Fig. 2 is a partial plan view of the motorcycle, and Fig. 3 is the m-■ line r! of Fig. 1. 4 is a sectional view taken along the line rL-IV in FIG. 3, FIG. 5 is a perspective view in the direction of arrow A in FIG. 1, and FIG. 6 is a view in the direction of arrow B in FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 8 is a cross-sectional view taken along the line ■-vI in FIG. 1, and FIG. 9 is a cross-sectional view taken along the line IX-] in FIG. l...Scooter type motorcycle, 2...Head pipe, 8...Step part, 9...Size 1-frame, 1
9... Unit swing type engine, 35... Seat.

Claims (1)

[Claims] In 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 section located below the rear of a head pipe, the step section and the side frame are integrally molded. A scooter-type motorcycle that is characterized by: