JPS58118475A - 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 motorcycle, a tricycle, a special vehicle, a head pipe, a down tube extending rearward from the head pipe, a rising portion connected to the rear end of the down tube, and a A vehicle body frame is constituted by a pair of left and right side frames each having a horizontal portion extending horizontally backward from the upper end, and a cross member connecting these both side frames, and a power unit is arranged behind the rising portion of the both side frames. related to what was done.

In such motorcycles and tricycles, in order to reduce the dimensions of the entire vehicle in the longitudinal and lateral directions without narrowing the riding space for the operator, it is necessary to reduce the space between the pair of left and right side frames. It is required to insert as many parts of the power unit as possible within the limited space between the power unit and the side frame to bring the power unit close to the side frame.

An object of the present invention is to provide a simple and effective motorcycle or tricycle that satisfies such requirements. It is composed of an upper plate bent inward and a lower plate bent outward from the lower end of the main plate, and a part of the power unit is exposed between the main plates of both side frames, and the power unit is attached to the both side frames. It is located close to each other.

Hereinafter, an embodiment in which the present invention is applied to a scooter will be described with reference to the drawings. In FIG. 1.2, the vehicle body frame 1 consists of a front frame 1f and a rear frame 1r,
The front frame 1f includes a head pipe 2 and a down tube 3 extending rearward from the head pipe 2 in an L-shape.
, a pair of side frames 4 and 4' arranged on the left and right sides of the down tube 3, a bridge member 5 that connects the front ends of these side frames 4 and 4' to the head pipe 2, and a pair of side frames 4 and 4'.
．． 4' and a cross member 6 that connects the intermediate portions of the down tubes 3 to the down tubes 3, respectively. The rear frame 1r has a pair of side frames 1, 1' arranged on the left and right with a narrower interval than between the side frames 4, 4' of the front frame 1f, and these side frames 7, 7' are arranged at both ends. It is composed of cross members 81 to 84 that are connected to each other at two places, one in the middle part and the other in the middle part, and the rear end of the down tube 3 is connected to the frontmost cross member 81. are connected to both side frames 4, 4' of the front frame 1f via a cross member 9.

Each of the side frames 7, 7' of the rear frame 1r is bent at the middle part, and has a rising part 10 rising from the joint with the down tube 3, and a horizontal part extending horizontally rearward from the upper end of the rising part 10. 11. Each of the side frames 1, 1' is made of steel plate, and as shown in FIGS. 3 and 4, includes a main plate 12 in the vertical direction, and an upper plate 13 bent at a right angle from the upper end toward the inside of the vehicle. Lower plate 1 bent at a right angle from the lower end of the main plate 12 toward the outside of the vehicle
4, and each cross member 82~ except for the front part.
84 is also made of steel plate and consists of a main plate 15, an upper plate 16 and a lower plate 17, and a connecting flange 1Tα is provided at both left and right ends of the lower plate 1γ.
, 17a' are integrally provided in a protruding manner. When joining,
The upper plate 16 of each cross member 82 to 84 is attached to the side frames 1, 7'.
Spot welding 18 is performed on the lower surface of the upper plate 13 of each cross member 8. ~84 lower plate 17 connection 7 langes 1Tα, 17
(Z' is spot welded 19 to the lower surface of the lower plate 14 of both side frames 7, 7'. Such spot welding 18, 19
Since there is no interference between the respective electrodes, they can be performed simultaneously. Also, on the outside of the side frames T and 1', each main plate 1 is provided.
2 and the lower plate 14 define a groove 20, and this groove 2
゜ is used for accommodating electric wires and wires 21.

A steering shaft 23Z of a front fork 23 that pivotally supports a front wheel 22f is attached to the head pipe 2, and the front frame 1
A floor 24 is formed on f.

Immediately after the rising portion 10 of the rear frame 1γ, there is disposed a power unit 27 that integrally includes an engine 25 and a transmission snowmaking 26 that supports and drives the rear wheels 227. The rear end portion is suspended from the upright portion 10 via a link 28, and the rear end portion is suspended from the horizontal portion 11 via a shock absorber 29. Further, a sheet 30 is provided on the horizontal portion 11.

In this case, the power unit 2
7 is arranged close to the rising portion 10 of the rear frame 1r by inserting a part of the engine 25, such as the carburetor 25C and the exhaust pipe 25e, as deeply as possible between the main plates 12 and 12 of the side frames 7 and 7'. . Particularly noteworthy here is the frame T on both sides.

The outer lower plates 14, 14 of 7' do not interfere with the insertion of the exhaust pipe 2510 between the two main plates 12, 12, and if the lower plates 14, 14 of If the power unit 21 is bent in this direction, the above-mentioned insertion will be hindered, and the power unit 21 will have to be moved back from the rising portion 10 of the rear frame 1r accordingly. 31 indicates an exhaust muffler.

Incidentally, the present invention can also be applied to a tricycle having one wheel at the front and two wheels at the rear.

As described above, according to the present invention, the left and right pair of side frames T and 1' of the rear frame 1r are respectively connected to the main plate 12 in the vertical direction,
The main plate 12 is composed of an upper plate 13 bent inward from the upper end of the main plate 12 and a lower plate 14 bent outward from the vehicle from the lower end of the main plate 12. .Since the power unit 27 is faced between the frames 1 and 12, the lower plate 14 of them can be placed within the limited space between the frames 1 and 12 on both sides.
A part of the power unit 27 can be inserted without being obstructed by the power unit 27, and the power unit 27 can be placed close to the rising portion 1o, which contributes to downsizing of the vehicle.

In addition, the lower plate 14 not only serves to strengthen the rigidity of the rear frame by giving both the main plate 12 and the upper plate 13 a large section modulus to each side frame 7, 7', but also serves to strengthen the rigidity of the rear frame. , 1' can be conveniently used in the arrangement area of the electric wires 21 without being obstructed by the cross members 8I to 84 between them.

[Brief explanation of drawings]

Fig. 1 is a side view of a scooter embodying the present invention with the cover removed, Fig. 2 is a perspective view of the body frame of the same scooter, and Figs. It is an IV-IV scarlet sectional view. 1... Body frame, 1f, 1r... Front and rear frames, 2... Head pipe, 3... Down tube, T, 1'... A-shaped frame, 8. ~8. ...Cross member, 1°...Rising part, 11...Horizontal part, 12...
・Main plate, 13... Upper plate, 14... Lower plate, 27...
Power unit patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] A head pipe (2), a down tube (3) extending rearward from the head vibe (2), and a rising portion (10) connected to the rear end of the down tube (3).
and a pair of left and right side frames (7, γ') consisting of a horizontal portion (11) extending horizontally backward from the upper end thereof, and these side frames (
The vehicle body frame (1) is constituted by the cross member (L~82) connecting between the two side frames (7, 7').
Immediately after the rising part (10) of '), the power unit) (27)
In a motorcycle or tricycle equipped with
7') in the vertical direction, a main plate (12) in the vertical direction, an upper plate (13) bent inward of the vehicle from the upper end of this main plate (12), and the main plate (
The lower plate (14) is bent outward from the lower end of the vehicle (12), and the rising portion (10
) between the main plates (12, 12) of the
27) Motorcycles and tricycles that are characterized by facing.