JPS5827897Y2 - motorcycle body - Google Patents

Description

[Detailed explanation of the idea] This invention relates to improving the body of a motorcycle.

Motorcycle bodies can be roughly divided into those made of pressed steel plates and those made of steel pipes joined by welding.

Steel plate press molds have high productivity and can be made inexpensively if mass produced, but press molds are expensive, equipment costs are high, and they are only suitable for mass production.

In addition, since steel pipe welding can be done by bending force and welding, the equipment cost is low, but there are many welding points, which is time-consuming, and the manufacturing cost is high.

In particular, the holding pieces must be welded to the locations where various parts are attached, which greatly increases the number of welding locations.

Further, steel pipes have limitations in bending, and there are inconveniences such as the fact that parts cannot be attached freely.

In consideration of these points, this idea combines steel pipes and pressed steel plates to increase productivity, reduce equipment costs with a small press die, and reduce welding points by using steel plates to attach parts. The present invention has been improved to reduce manufacturing costs, and an embodiment of the present invention shown in the drawings will be described below.

The front ends of left and right brackets 3 are connected by welding to the rear end of an upper pipe 2 whose front end is connected to a head pipe 1 by welding.

The bracket 3 is a six-prong head pipe 1 formed by press-forming a steel plate and spot welding the periphery to match the middle shape.
The front ends of the left and right antennas 5 are connected by welding to the lower ends of the down pipes 4 whose upper ends are connected by welding.

A leg piece 6 made of a steel plate is connected to the rear end of the underpipe 5 by welding.

The left and right leg pieces 6 are inserted into the bridge pipe 7 and connected by welding.

The upper ends of left and right vertical pipes 8 are welded and connected to the left and right brackets 3, and the lower ends of the left and right vertical pipes 8 are connected to a bridge pipe 7 by welding.

Left and right rear pipes 9 are connected to the rear ends of the left and right brackets 3.

In addition, parts mounting nuts and the like are fixed to the left and right brackets 3 by spot welding or the like.

The effect will be explained.

Since left and right steel plate brackets 3 are used at the upper center of the vehicle body, the welded joints of the upper pipe 2, vertical pipe 8, and rear pipe 9 can be fitted or welded face-to-face, making it possible to weld the pipes together. It is easier to align, the welding work is simpler and cheaper, and the rigidity can be increased.

The left and right brackets 3 are made with small press molds, which reduces equipment costs, and since they are made with press molds, they can be shaped freely, allowing for shapes that suddenly widen to the left and right from the joint between the upper pipe 2 and bracket 3. As a result, the interval between the vertical pipes 8 can be widened, and sufficient dimensions can be obtained to accommodate parts such as the air cleaner and battery between the left and right brackets 3 and the left and right vertical pipes 8, and a large and high-performance air cleaner can be used. .

The inlet underpipe 5 can be welded and connected by inserting the leg piece 6 into the bridge pipe 7, making welding work easier.

The distance between the left and right under pipes 5 is the left and right vertical pipes 8.
This makes it easier to pass through the engine muffler, etc.

As explained above, this invention connects the front ends of the left and right steel plate brackets to the rear end of the upper pipe, connects the lower ends of the left and right vertical pipes whose upper ends are connected to the brackets with a bridge pipe, and connects the lower ends of the down pipe C. The front ends of the left and right underpipes were connected to each other, and the steel leg pieces connected to the rear ends of the underpipes were inserted through the bridge pipe to connect them.The rear pipes were connected to the rear ends of the left and right brackets, so the steel pipes and Welding the joints between steel plates becomes easier, reducing costs, and the left and right brackets have more freedom in shape and can be made wider, allowing more room for parts to be housed inside.

And since the steel plate part is small, the press mold can be made at low cost.

In addition, the welded parts of the steel plate and the steel pipe can be fitted and matched, making positioning easy and increasing rigidity.

Nuts and the like can be easily fixed to the bracket by spot welding, and various parts can be attached at low cost.

Furthermore, since the underpipe is connected to the bridge pipe via the leg pieces, it can be sandwiched between the widths of the left and right vertical pipes, and the muffler of the engine can be sandwiched between the pipes, which is convenient from a running standpoint.

In this way, overall productivity is high, manufacturing costs are low, equipment costs are low, and various parts can be conveniently arranged.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is an enlarged cross-sectional view taken along the line A-A in Fig.
It is an enlarged cross-sectional view in the direction of arrows. 2... Upper pipe, 3... Bracket, 4... Down pipe, 5... Under pipe, 6... Leg piece,
7... Bridge pipe, 8... Vertical pipe, 9...
rear pipe.

Claims (1)

[Scope of utility model registration request] Connect the front ends of the left and right steel plate brackets to the rear end of the upper vibe, connect the lower parts of the left and right vertical pipes whose upper ends are connected to the brackets with a bridge pipe, and connect the front ends of the left and right under pipes to the lower end of the down pipe. A motorcycle body characterized in that a leg piece made of a steel plate connected to the rear end of an underpipe is inserted through and connected to a bridge pipe, and the rear pipe is connected to the rear ends of left and right brackets.