JPS58122270A - Car body frame of automatic two- and three-wheel barrow - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a body frame of a motorcycle or a tricycle, in particular, a head pipe, a down tube extending rearward from the head pipe, and a body frame connected to the rear end of the down tube so as to extend further rearward. It relates to a vehicle body frame with a pair of left and right side frames.

Generally, in such a vehicle body frame, in order to strengthen the rigidity of the left and right side frames, the left and right side frames are connected by a large number of cross members, but the use of a large number of cross members inevitably increases the weight of the vehicle.

The present invention aims to reduce the weight of the vehicle body (proposed).
Highly rigid article storage boxes and fuel tanks, which are originally provided in motorcycles and tricycles, are connected to the both side frames with a cross member, thereby making it possible to significantly reduce the use of dedicated cross members. It is an object of the present invention to provide the above-mentioned vehicle body frame.

Hereinafter, an embodiment in which the present invention is applied to a scooter will be explained with reference to the drawings. In FIGS. 1 and 2, the main body frame 1 consists of a front frame 1f and a rear frame 1r,
The front frame 1f includes a head vibe 2 and a down tube 3 extending rearward from the head pipe 2 in an L-shape.
The rear frame 1r is composed of a pair of side frames 4, 4' arranged with certain recesses on the left and right sides, and these side frames 4, 4' are arranged at two places at both ends and at two places in the middle part. It is composed of cross members 5□ to 54 that are connected to each other at points, and the frontmost cross member 5. The rear end of the down tube 3 is connected to the down tube 3.

Each one-way frame 4, 4' is bent in the middle, and the upright part 6 rising from which joint of the down tube 3 and its -1
It has a horizontal portion 7 extending horizontally rearward from one end. Each side frame 4, 4' is made of a steel plate, and as shown in Fig. 3-4, it has a main plate 8 in the vertical direction, an upper plate 9 bent at a right angle inward from one end of the main plate 8, and a main plate 8. The lower plate 1107 is bent at a right angle from the lower end of 8 toward the vehicle side 1. Also, each cross member 52 to 51 except for the front part is also made of steel plate and is bent from the main plate 11, f = plate 12 and lower plate 13. The lower plate 1
Connecting flanges 13 (L, 130
．． ' should be protruded in one piece. When joining, each cross member 52-5. The upper plate 12 is spot welded 14 to the lower surface of the upper plate 9 of both side frames, and the lower plate 13 of each cross member has a connecting flange l 3 a,.

13a' is spot welded 15 to the lower surface of the -F plate 10 of both (II) 1. Spot welding like this 14.15
Since the interference between the respective electrodes is /f, it is possible to perform them at the same time.In addition, in the /A1 rule of each A rule 1 and 4', there is a concave groove 29 formed by the main (reverse 8 and the lower plate 10). This recessed groove 29 can be used for accommodating electric wires and wires 30.

Between the side frames 4 and 4', there is an article storage box 16 at the front of the wooden part 7, and a Seiki I tank 17 at the rear.
41 fi people each, and a mounting flange 16a extending from one frontage of the article storage box 16 to the periphery.
are fixed to the upper plate 9 of both side frames 4, 4' with bolts 18, 18, etc., and are also connected to the surrounding wall 174 (
The flange 17a overhanging is also attached to both side frames 4, 4.
' is fixed to the upper plate 9 with bolts 79.1!9. In this way, the article storage box 1G and the sorting bracket 17 are bridged between the side frames 4 and 4', and function as a cross member, which can serve to strengthen the rigidity of the rear frame 1r.

' The steering shaft 211Z of the front fork 21 that pivotally supports the front wheel 2Df is installed in the head pipe 2 over the years;
A floor 22 is formed on the down tube 3. Also,. The engine 2 is located below the horizontal portion 7 of the rear frame 1r.
3 and a power unit 25 that integrally constitutes a transmission device 24 that drives the rear wheel 2Or in a support gear and J1ζ is disposed, and the front end of the power unit 5-1. The rear end is suspended from the horizontal part I through the shock absorber 2γ.
K1Mi should be put on the shelf. Furthermore, the horizontal portion γ- of the rear frame 1r
■Note 2B makes several phrases i' on -.

Note that the present invention can also be applied to a tricycle having one wheel in the front and two wheels in the rear.

As described above, according to the present invention, the article storage boxes 16,
Since a highly rigid container such as the fuel tank 17 is connected as a cross member, the container functions as a strength member and increases the rigidity of both side frames 4, 4', and as a result, the use of a dedicated cross member can be greatly reduced. t7, it can contribute to reducing the weight of the vehicle body7:,).

[Brief explanation of drawings]

Fig. 1 is a side view of a scooter embodying the present invention, Fig. 2 is a perspective view of an extracted half of the vehicle body frame; I~y-
It is a sectional view taken along the tv line. 1-11! :Body 7 v-m, 1r゛front frame, 1r
・・・Rear frame, 2 head vibe, 4, 4'・
...Side frame, 16...Goods storage box, 17...Fuel tank patented IP, ++ person Honda Motor Co., Ltd. 7-

Claims (1)

[Claims] A head pipe (2), a down tube (3) extending rearward from the head pipe (2), and a pair of left and right side frames (4) connected to the rear end of the down tube (3) and extending further rearward. , 4') for a motorcycle or tricycle, characterized in that containers such as an article storage box (16) and a fuel tank (17) are connected to the side frames (4, 4') as cross members. Body frames for motorcycles and tricycles.