JPS5839923Y2 - vehicle wheels - Google Patents

Description

[Detailed description of the invention] The rim part that attaches to the vehicle wheel and holds the tire and the disc part that attaches the wheel to the vehicle bubble are rolled, cast, or
It has already been done to manufacture wheels separately by forging, etc., and then join them together by welding to form a wheel.

An example is shown in FIG.

The structure shown in FIG.
A bead B' protruding from the inner circumferential surface of the rim part A toward the axis of the rim part A is integrally formed, and the outer end of the disc part C is brought into contact with the inner end surface of the bead B, and welded by welding. The rim part A and the disk part C are connected by forming a section.

In this way, according to the conventional method, the rim part A and the disc part C are simply butt-welded, so that the button between the two parts A and C cannot withstand a relatively large external force load. There was a risk of breakage or peeling at the welded part due to bending, shearing, twisting, etc.

The object of this invention is to provide an improved vehicle wheel that maintains the strength to withstand the above-mentioned external force loads and has improved sturdiness.

This invention will be described below with reference to the embodiments shown in FIGS. 1 to 3.

In the figure, reference numeral 1 denotes an annular rim portion forming a seat 2 for holding the tire, which is rolled by, for example, a ring roll method, and is integrally formed with a flange-shaped bead 3 extending toward the center. This bead 3 is provided with a notch 4, thereby forming an end 5, a shoulder 6, and a joint surface 7 formed therebetween.

On the other hand, reference numeral 8 denotes a disk portion, which is formed into a bi-disc shape by, for example, casting or forging, and has a notch 9 formed on its outer periphery, and a shoulder that engages with the end portion 5 by a button in this notch 9. A portion 10 , an end 11 engaging the shoulder 6 and a joint surface 12 contacting the joint surface 7 are formed.

A band-shaped protrusion 13 is provided protruding toward one of the bonding surfaces 7 and 12, for example, the bonding surface 7 in the illustrated embodiment. This is effective in improving the bonding strength and reducing the force required for joining.

According to the above structure, the rim part 1 is first fixed and pressed, and the notch part 9 of the disc part 8 is pushed into the notch part while rotating, so that the notch part 9 of the disc part 8 and the notch part 4 of the rim part 1 As shown in FIG. 3, friction welding is performed between each end, shoulder, and joint surface of the This has the effect of reducing the force required for joining.

As described above, according to this invention, the rim portion 1 and the disk portion 8 are connected by the respective notches 4 and 9, and the Q-joint improves the joining effect based on stress concentration due to the presence of the band-like protrusion. Since the welding is performed firmly by the accompanying friction welding, it can strongly resist external force loads, and the practicality of this type of vehicle wheel can be significantly improved.

[Brief explanation of the drawing]

Figure 1 is a side view showing a half section of an embodiment of this invention, Figures 2 and 3 are enlarged sectional views of essential parts showing each stage of the manufacturing process of the wheel of this invention, and Figure 4 is It is a vertical sectional view of an example of a conventional product. Please note that the buttons in the diagram are 1... Rim section, 2...
・Seat, 3...Bead, 4...Notch,
5...End part, 6...Shoulder part, 7...
...Joint surface, 8-...Disc part, 9...
- Notch portion, 10...Shoulder portion, 11...End portion, 12...Joint surface, 13...Band-shaped protrusion.

Claims (1)

[Scope of utility model registration request] The rim part that holds the tire and the disc part that attaches the wheel to the vehicle are constructed separately, and at the junction of these two parts, one of the two parts has an end part and a shoulder part. and a joint surface formed therebetween, and the other side has a shoulder, an end, and a joint surface that are frictionally welded to the end, the shoulder, and the joint surface, respectively. What is claimed is: 1. A vehicle wheel comprising a belt-like protrusion formed on one side of the welding direction constituting the welding portion for improving the joining effect due to stress concentration during friction welding.