JPH0129121Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle wheel mainly applied to motorcycles and other two-wheeled vehicles.

Conventionally, this type of wheel has a drum a made of a steel plate or other metal plate as shown in FIG.
A spoke plate e made of a steel plate or other metal plate, which is fitted and bound onto the boss d and extends outward in the circumferential direction, is fitted onto the boss d at the center cylindrical shaft-shaped or other shaft hole f. A type is known in which this is provided at least in the middle part of the drum a, overlapped with the outer periphery of the end face of the drum a, and bonded by welding g performed at the inner seam. As shown in Figure 2, the joint is generally straight and the joint on the inside is a roughly V-shaped recess.In such a joint, the angle α is The weld g in the seam is relatively small and thus, during welding operations, for example with a welding torch, the positioning of the torch is relatively difficult and the welding g in the seam is relatively small.
is likely to cause thinning or undercuts, and furthermore, the outward bending stress acting on the intermediate portion will cause the weld g
This is accompanied by disadvantages such as the welding strength tends to decrease to some extent as it acts concentratedly on the area.

The purpose of the present invention is to obtain a device free of such inconveniences, and a flange 2 is connected to one end of a metal plate drum 1 via an inwardly bent shoulder, and a flange 2 is provided at the center of the drum 1. A cylindrical shaft 3 is provided and fixedly fitted to the boss 4, a shaft hole 6 is provided at the center of a spoke plate 5 made of a metal plate and fitted and fixedly fixed to the boss 4, and the flange 2 and the spoke plate 5 are overlapped. In the vehicle wheel welded by the welding method, an annular convex portion 8 protruding toward the drum 1 is provided at the intermediate portion of the spoke plate 5, the inner diameter side of the convex portion 8 is circumscribed by the shoulder of the drum 1, and the convex portion 8 is It is characterized in that the drum 1 and the spoke plate 5 are joined by welding 7 over the surface of the drum 1 and the circumferential surface of the drum 1.

FIG. 3 shows one example, in which the shaft hole 6 is formed into a cylindrical shaft shape by a flange 9 that is bent at the inner peripheral edge. In the drawings, numeral 10 indicates a rim on the outer periphery of the spoke plate 5, and numeral 11 indicates a tire on the outer periphery.

To explain its operation, a convex portion 8 is provided in the intermediate portion in advance.
The seam formed between the inner side and the outer periphery of the end face of the drum 1 is, for example, as clearly shown in FIG. In addition to making the torch positioning easier, the overlay end face of the weld 7 becomes substantially flat, improving weldability, and the bending stress acting on the plate 5 on the outer periphery is dispersed from the weld 7 to the outer periphery. However, the welding strength increases compared to when these are concentrated.

According to the present invention, since the annular convex portion 8 of the spoke plate 5 is circumscribed to the shoulder of the flange 2 of the drum 1, positioning of both members is facilitated, and the outer periphery of the drum 1 and the convex portion 8 are Since the corner β formed on the surface of the weld 7 can be made large, the work can be easily performed when welding 7, and the welding strength can be increased because sufficient build-up can be performed.

Moreover, even if internal strain occurs in the welded portion, since the convex portion 8 is curved, the internal strain is alleviated and the stress is dispersed.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of a conventional example, Fig. 2 is an enlarged sectional view of its main parts, Fig. 3 is a cutaway side view of an example of the proposed wheel, and Fig. 4 is an enlarged sectional view of its main parts. . 1...Drum, 2...Flange, 3...Cylinder shaft,
4...Boss, 5...Spoke plate, 6...Shaft hole, 7...Welding, 8...Protrusion.

Claims (1)

[Scope of utility model registration request] A flange 2 is connected to one end of a metal plate drum 1 via an inwardly bent shoulder, a cylindrical shaft 3 is provided at the center of the flange 2, which is fitted and fixed to a boss 4, and a metal plate spoke plate 5 is provided. In a vehicle wheel in which a shaft hole 6 is provided at the center of the spoke plate 5 and the hub 4 is fitted and fixed thereto, and the flange 2 and the spoke plate 5 are overlapped and welded, an intermediate portion of the spoke plate 5 protrudes toward the drum 1 side. An annular convex portion 8 is provided, the inner diameter side of the convex portion 8 is circumscribed to the shoulder of the drum 1, and welding 7 is performed across the surface of the convex portion 8 and the circumferential surface of the drum 1 to connect the drum 1 and the spoke plate. A vehicle wheel characterized by combining 5.