JPS6236910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle body structure suitable for a low-floor, small-sized, lightweight scooter type vehicle.

(Prior art) The external shape of small, lightweight motorized tricycles and four-wheeled vehicles, which are approximately the same size as two-wheeled vehicles, is similar to that of low-floor scooters in consideration of ease of driving, handling, etc. Pipe frames are generally used for frames of vehicles including scooters.

(Problems to be Solved by the Invention) When the pipe frame as described above is used to route harnesses, etc., the outer surface of the frame is curved, so many mounting brackets are required in addition to the clamper that directly supports the harness. In addition, since these are exposed on the outer surface, it is difficult to say that it is the best in terms of protection.The number of parts is large, the structure is complicated, and the installation work of these brackets is required, and the manufacturing is troublesome and complicated. There is room for improvement, such as the fact that it is not advantageous and that it is not the best in terms of weight reduction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a frame structure for a scooter type vehicle, which eliminates the above-mentioned drawbacks and is capable of protecting harnesses and other parts and improving the ease of attachment.

(Means for Solving the Problems) The present invention connects the front ends of the left and right members made of plate materials having at least a flange portion on the lower side to the lower part of the down tube by tilting them toward the center front, and The rear part of the frame member stands upward to form a seat support part, and the flange part projects in the width direction of the vehicle body, and wires and harnesses are routed from the down tube side to the flange part along the frame member. It is constructed so that it is attached continuously from the side of the vehicle body.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view showing the frame structure, and FIG. 2 is a plan view of the middle or rear portion.

A frame 2 of a scooter type vehicle 1 consists of a front member 3 and a rear member 4, which are down tubes. The front member 3 has an L-shape with curved sides, and in the embodiment is made of a single pipe with a relatively large diameter, and a head tube 5 is fixed by welding or the like to the front end of the front portion 3a that stands upwardly in the front. A front fork-shaped front wheel support member 7 is pivotally connected to the head tube 5 via a steering stem 6, and one front wheel 8 serving as a steering wheel is attached and supported on the left and right sides of the front wheel support member 7. A handle 9 is attached to the upper end of the steering stem 6 protruding above the head tube 5.

The above-mentioned front member 3 integrally includes a front part 3a hanging rearward and downward from the head tube 5, an intermediate part 3b curved rearward and downward, and a rear part 3c extending rearwardly from this by an appropriate length, The rear part 3c is in a low position. A rear member 4 is provided on both sides of the intermediate portion of the rear portion 3c in the front-rear direction.
The front end of the rear member 4 is fixed by welding or the like, and the rear member 4 consists of left and right members 4-1 and 4-2. The members 4-1 and 4-2 have a symmetrical shape on the left and right, the front part 4a is at a low level, the front member 3 extends rearward from the rear part 3c, and the front end has joints on both sides of the rear part 3c as shown in FIG. 4b, 4b to the rear by bending and bulging outwards, and excluding the joints 4b, 4b at the front end, it has a sufficient width on the left and right compared to the front member 3, in the width direction between the front and rear wheels in the embodiment. They are each bulged outward to have a width slightly smaller than the width of the floor member 39, and extend rearward at a predetermined distance apart, so that the width is narrower than that of the floor member 39. From the rear end of each front part 4a to the member 4-
1 and 4-2 stand diagonally upward and rearward to constitute an intermediate portion 4c, and extend rearward from the intermediate portion 4c by being bent in the front-rear direction to constitute a rear portion 4d. The left and right members 4-1 and 4-2 have a channel-shaped cross section as shown in FIGS. 3 to 5 and 7, and the left and right members 4-1 and 4-2 extend in the width direction. Flat main bodies 4e having a predetermined thickness facing each other at a distance, and flange parts 4f, 4 bent outward from the upper and lower ends thereof.
g. The flange parts 4f and 4g are members 4-
The front part 4a of 1 and 4-2 goes up and down, the middle part 4c goes back and forth, and the rear part 4d goes back up and down, and the flange parts 4f and 4g are continuous from the front part to the rear part,
These left and right members 4-1, 4-2 are press-molded from steel plate material and are integrally molded. These left and right members 4-1, 4-2 are the rear part 4h of the front part 4a.
In the middle part 4c, the width between the grooves, that is, between the flanges is large, and the upper part 4i of the middle part 4b is the largest, and the flange part 4j at the upper end of the middle part 4c is provided substantially horizontally in the front-rear direction.

A cross member 1 is located between the left and right bent portions of the front portions 4a of the left and right members 4-1 and 4-2.
0 is constructed and joined, and the cross member 10 is joined to the rear end 3d of the front member 3 described above. A pin 11 is installed at the rear of the cross member 10 between the front parts 4a, and a link 12 is hung down through the pin 11. The upper end of the link 12 is pivoted to the frame 4 with the pin 11,
A front end of a swing joint 14 extending rearward of the frame is pivotally connected to the lower end of the frame 2 via a pin 13. The lower end of the reaction unit 15 is pivotally connected to the bracket part 14a provided on the intermediate part of the swing joint 14 with a pin 16, and a flat body is formed above the intermediate part 4c of the left and right members 4-1, 4-2. The upper end of the reaction unit 15 is pivotally connected to a pin 17 supported by a third cross member 26, which will be described later, installed between the joints 1 and 4e.
4 is supported by the frame 2 so as to be swingable in the vertical direction. Behind the joint 14 are the engine 18, crank case 19, and transmission case 2.
A rear frame 22 that carries and supports a power unit 21 integrated with 0, etc. is extended and supported in the front-rear direction via a support shaft 23, and the frame 2 including the joint 14, that is, the front part of the vehicle, is supported on the support shaft 23 as a fulcrum. The transmission case 20 has two rear wheels 2 that serve as driving wheels on the left and right sides of the rear of the transmission case 20.
4 and 24 are arranged.

As shown in FIG. 6, a second cross member 25 is installed between the lower portions of the flat portions 4e of the intermediate portions 4c of the left and right members 4-1 and 4-2 of the rear frame member, and A third cross member 26 covering the upper support pin 17 of the previously described rear action unit 15 is installed between the upper parts, and a fourth cross member 27 is installed between the upper flange parts of the higher rear part 4d. Furthermore, a fifth cross member 28 is installed between the rear end portions. Thus, the left and right members 4-1, 4-2 are the cross members 10, 25-2.
8 are arranged in parallel and bonded to obtain rigidity and strength.

The fuel tank 29 is mounted and supported between the flange portions 4j, 4j forming the upper ends of the intermediate portions 4c of the left and right members 4-1, 4-2 of the frame rear member. The fuel tank 29 is formed by stacking and joining a lower member 29a in the shape of a deep concave dish and an upper member 29b in the shape of a shallow inverted concave, and the upper and lower members 29b, 29a are formed so as to extend outward by bending at opposite ends. The flange portions 29c and 29d are overlapped and joined to form an integrated structure, and the lower flange portion 2
Place the left and right sides of 9c between the substantially horizontal flange parts 4j, 4j, make the lower member 29a face between the upper part of the middle part 4c, pass the bolt 30 between the flange parts 29c, 29d, 4j, 4j, and screw it in with the nut 31. do. This eliminates the need to provide a bracket for the fuel tank on the frame, and allows the tank to be mounted and supported on the flat, horizontal flange of the frame. This will constitute the members. The fuel tank 29 has a flange portion 4j at the middle or rear portion.
4j, the front part protrudes forward, a hinge member 32 is fixed to the upper part of the front end of the tank 29, the lower part of the front end of the seat 33 is pivoted, and the seat 33
The seat 3 can be raised and lowered using the lower front end as a fulcrum.
3 to expose the tank 29, fold it down and use it as a seat, and attach both sides of the bottom of the seat 33 to the tank 29.
It is supported by flange parts 4j, 4j on the frame side via flange parts 29c, 29d, and 34 is a support part that receives the rear lower surface of the seat and is provided on the fourth cross member 27.

By the way, there is a tail light unit 35 at the rear end of the rear member 4 of the frame 2, a head light unit (not shown) in front of the handle, a turn signal lamp, and other electrical equipment such as the engine starter relay and CDI unit, as well as these. A harness 36 or the like that prevents the battery from becoming sluggish is provided. The harness 36 extends from the front to the rear, and since the left and right members 4-1 and 4-2 of the rear member 4 of the frame 2 have an outward channel shape, that is, a groove shape, the upper and lower flange portions 4
The flat between f and 4g is fixedly connected to the outer surface of the main body 4e via a fastener 37 along the groove, and the relay and CDI unit are also fixed to the outer surface of the main body between these grooves. The space between the flange parts is large and the side surface area is large from the rear of the front part 4a to the middle part 4.
It is attached to the outer surface of c. These electrical components are housed between the flange parts, and the harness 36 is attached to the flange part 4.
Facing the inside of flange parts 4f and 4g, the relay 38 only partially protrudes outward from the flange parts 4f and 4g, and these are protected by the flange parts.
Furthermore, it is not necessary to provide these mounting brackets on the frame by using only the fasteners 37.

Since the frame 2 is constructed of the left and right members 4-1 and 4-2 with outward channel cross sections, the members themselves have high strength and rigidity, and therefore the materials of the members 4-1 and 4-2 are Even if the wall thickness is reduced, the weight is reduced, and molding becomes easier, a product with excellent strength and rigidity can be obtained. In addition, the flange part of the channel can be used to attach and support the fuel tank between members, and the tank can be supported without separately installing a special bracket. , the seat is supported by the frame via the tank supported by the frame and the flange part, so the load is not applied to the tank much, and the tank can be made thinner, making it lighter and easier to manufacture. . Furthermore, electrical components such as harnesses are held between the outwardly open grooves, which is advantageous in terms of their protection, and there is no need to provide separate mounting brackets for these components, which simplifies the frame structure. Furthermore, even if the harness should become slack, it can be held by the lower flange or the like.

FIG. 8 shows a modified embodiment of the rear frame member, in which the upper end portions of the main body 204e of the left and right members 204-1, 204-2 are bent outward to create an upper flange portion 204.
f, and the lower end portions are bent inward to form the lower flange portions 204g, and the above effects can be obtained even with such a cross-sectional shape.

Although the embodiment has been described in detail above, it is not necessarily necessary that the frame front member is made of a single pipe material as in the embodiment, and the left and right members may be extended to the front part. It should also be noted that the present invention can also be implemented by joining two parallel pipe materials to the left and right members.

(Effects of the invention) Wires, harnesses, etc. can be passed continuously from the down tube connected to the head tube that supports the handle to the frame member made of left and right plates, and wiring is easy because the connecting member of the frame is used. be.

In addition, since the plate material has a flange at the lower end, even if cables such as wires and harnesses bend downward, they can be caught at that part, so the number of clampers can be reduced and the weight can be reduced. Furthermore, the cables can be protected from water, mud, etc., and the lifespan of the cables can be improved.

In addition, since the down tube is continuous diagonally to the left and right frame members, even if a foreign object hits the flange, the impact on the car body is alleviated, and the foreign object can be guided to the side of the car body and removed from the direction of travel. I can do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view showing the frame of a vehicle, FIG. 2 is a plan view of the main part, FIG. Fourth
5 and 5 are sectional views taken along lines 4-4 and 5-5 in FIG. 1, FIG. 6 is a perspective view of the frame, FIG. 7 is a vertical sectional view of the frame, and FIG. It is a diagram. In the drawings, 1 is a vehicle, 2 is a frame, 3 is a front member, and 4-1 and 4-2 are left and right members.

Claims (1)

[Claims] 1 At the lower part of the down tube of the frame of a scooter type vehicle, the front end portions of the left and right frame members having flange portions at least on the lower side are connected to the down tube by tilting them toward the center front, and the rear ends of the left and right frame members are connected to the down tube by tilting them toward the center front. stands upward to form a seat support part, and the flange part is formed to protrude in the width direction of the vehicle body, and wires and harnesses are continuous from the down tube side to above the flange part along the frame. A frame structure for a scooter-type vehicle characterized by being attached from the side of the vehicle body.