JPS5839921Y2 - vehicle wheels - Google Patents

Description

[Detailed description of the invention] In a vehicle wheel, the rim part that holds the tire and the disc part that attaches the wheel to the hub of the vehicle are manufactured separately by rolling, casting, forging, etc., and these two parts are manufactured separately. Welding has already been done to combine them to form a wheel.

An example is shown in FIG.

In the structure shown in FIG. 5, an annular rim portion A and a bead B protruding from the inner peripheral surface of the rim portion A toward the axis of the rim portion A are integrally formed. The rim portion A and the disk portion C are joined by abutting the disk portion C and the outer end surface against the inner end surface and forming a welded portion by welding.

In this way, according to the conventional method, the rim part A and the disc part C are simply butt-welded, so when a relatively large external force is applied, the two parts A
.

There was a risk of breakage at the welded part due to bending, shearing, twisting, etc.

The object of this invention is to provide a vehicle wheel that is improved so as to maintain the strength to withstand the above-mentioned external force loads.

This invention will be described below with reference to the embodiments shown in FIGS. 1 to 4.

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 has a brim-shaped bead 3 extending toward the center formed integrally with the rim portion. The bead 3 is provided with a stepped surface 5 having a stepped portion 4.

On the other hand, it has a stepped surface 7 provided with a step 6 that engages with the step 4, and a shoulder 8 that receives and stops the end 3' of the bead 3.
The disc part 9 provided with this is shaped into a disc-shaped bottom by casting or forging, and a hub hole 10 is bored in the center of the disc part 9 through which the hub of the vehicle is inserted. Bolt holes 11 are drilled for attachment to the hub.

In the stepped surfaces 5 and 7 of the stepped portions 4 and 6, which form the joining surfaces between the rim portion 1 and the disk portion 8, band-shaped protrusions 12 and 13 are provided protruding from the stepped surface 7 side, and the stepped portion 6 The band-shaped protrusions 12 and 13 protruding from each side of the stepped surface 7, which is divided into two sides due to the Providing the protrusions 12 and 13 allows welding to be performed using a low capacity flash butt welder.

The rim part 1 configured as described above and the end part 3' of the bead 3 of the disc part 9 are engaged with the shoulder part 8 of the disc part 9, and the stepped parts 4 and 6 are assembled in a state in which they are engaged with each other. 3
As shown in the figure, between the steps 5 and 7, there are 14 poles for the flash butt.

If welding is carried out using the ordinary flash butt welding method using the welding rod 15, a flash butt welding as shown in FIG. 4 will be achieved.

In this case, the presence of the above-mentioned band-shaped protrusions 12,13 has the effect of reducing the capacity of the welding machine to be used for the welding operation.

In addition, for practical purposes, the band-shaped protrusions 12 and 13 may be provided protruding from the stepped surface 5 side.

As mentioned above, according to this invention, the rim part 1 and the disc part 9 are not simply welded, but the stepped surface 5 is
, 7 are combined to form a joint surface, and since the rim part and the disc part are integrated in terms of material structure, it maintains extremely high strength against external forces. In practical use, the reliability of this type of vehicle wheel is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a half section of an embodiment of this invention, and FIGS. 2 to 4 are enlarged sectional views of essential parts showing various installations for manufacturing a vehicle wheel of this invention. FIG. 5 is a vertical sectional view of an example of a conventional product. In the figure, 1... rim part, 2...
- Seat, 3...Beat, 4...Danbe, 5
...Stepped surface, 6...Stepped part, I...
...Stepped surface, 8...Shoulder part, 9...
Disc part, 10...B hole, 11...
...Bolt hole, 12.13... Band-shaped protrusion, 14
．． 15... Flash bat electrode.

Claims (1)

[Scope of utility model registration request] A rim part for holding a tire and a disc part for attaching a wheel to a hub of a vehicle are configured separately, and a joining surface formed in a bead integral with the rim part is a stepped surface having a stepped part, The disc part is formed with a stepped surface having a stepped part that engages with the stepped part of the stepped surface, and a shoulder part that receives and stops the end of the bead, and at least the rim part and the disc part. A vehicle wheel comprising a band-like protrusion formed on one joint surface to improve current density during flash butt welding for structurally integrating the frame material between the rim portion and the disk portion.