JPH08150803A - Disc wheel - Google Patents

Abstract

PURPOSE: To reduce the fatigue in a joining part by forming each of plural hole parts in the circumferential intermittent spots of a disc at the intermediate part of a rising part of this disc, while applying a weld in an interval between the hole part and the inner circumferential surface of a rim. CONSTITUTION: At a rising part 14 of a disc 13, each of plural hole parts 15 is formed in the circumferential intermittent spots of the disc 13, while arc welding is applied in a space between the hole part and a rim 11. In this constitution, even in the case where an operating stress is concentrated on the vicinity of a spot near an outer circumferential edge 14 of the disc 13 in response to the load of a tire and an arrow direction moment M has acted, this stress is dispersed to a peripheral end 14a of the disc 13 and an arc fillet welding part 16 of the hole part 15 formed in a parallel part of the rim 11. In consequence, a repeated deformation is checked, and the extent of fatigue in a joining part is reduced, thereby eliminating any possible dangerousness of damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel structure for mounting a tire on the outer peripheral surface of a rim and a disk mounted on the inner peripheral surface of the rim and mounting the tire on a vehicle and a welding assembly method. , Especially to improve the durability of the wheels.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, regarding a conventional structure for coupling a rim and a disk which constitute a wheel, a disk 2 is press-fitted on the inner peripheral surface side of a rim 1 and its outer peripheral end portion. Two
It is most common that the corner fillet welding by arc welding 3 is applied to the intermittent portion in the circumferential direction in b.

[0003]

In the case of the wheel having the structure described above, when the moment M in the direction of the arrow acts on the disk 2 in response to the load of the tire as shown in FIG. Stress concentrates near the end 2b and is repeatedly deformed as shown by the chain line, resulting in severe fatigue of the part where the arc welding 3 is applied.
Strength deteriorates and breakage easily occurs.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems in the prior art and improves the durability of a wheel that has been arc-welded as a means for connecting a rim and a disk. Specifically, in a disc wheel in which a rising portion of a disc is fitted to the inner peripheral surface of a rim and welded, a plurality of hole portions are formed at intermittent portions in the circumferential direction at an intermediate portion of the rising portion of the disc. The present invention relates to a disc wheel for an automobile, characterized in that fillet welding is performed between at least a part of the hole and the inner peripheral surface of the rim to be integrally assembled.

Further, according to the present invention, in a disc wheel in which a rising portion of a disc is fitted and welded to an inner peripheral surface of a rim, a plurality of hole portions are provided at intermediate portions of the rising portion of the disc and at circumferentially intermittent portions. Together with forming
The present invention also relates to a disc wheel for an automobile, characterized in that fillet welding is performed between a portion of the hole portion near the hub hole of the disc and an inner peripheral surface of the rim to be integrally assembled.

[0006]

In the intermediate portion of the rising portion of the disc, a plurality of holes are formed at the circumferentially intermittent portions of the disc, and welding is performed between the holes and the inner peripheral surface of the rim. Even if stress is concentrated near the outer peripheral edge of the disc in response to the load of the tire, compared to the conventional structure in which fillet welding is applied to the outer peripheral edge of the disc with the rim,
The stress is dispersed in the outer peripheral end of the disc and the hole welded portion formed in the parallel portion of the rim, and as a result, repeated deformation is suppressed, fatigue of the joint is reduced, and the risk of damage is eliminated. it can.

[0007]

The specific contents of the present invention will be described below with reference to FIGS.
Referring to the embodiment shown in FIG. 2, 11 is a rim, 13 is an inner peripheral surface side of the rim 11,
The disk press-fitted into the drop center portion 12 is shown. The disc 13 has a plurality of circular or elliptical or square holes 15 formed in an intermediate portion of the rising portion 14 at circumferentially intermittent portions. Further, an arc fillet weld 16 is provided between the hole 15 and the drop center 12 on the inner peripheral surface of the rim 11 to form the rim 11.
And the disk 13 are integrally assembled.

The arc fillet welded portion 16 may be provided over the entire circumference of the hole 15, and only the portion of the hole 15 near the hub hole of the disk 13 or near the outer peripheral end 14a. Apply only to the part, etc.
Arc fillet welding 1 only in at least a part of each hole 15
6 may be applied, but especially the rim 13
The most preferable result in terms of strength is obtained by performing arc fillet welding between the hole 15 and the portion of the disk 13 near the hub hole.

Further, the rising portion 14 of the disk 13
In addition, a plurality of holes 15 are provided at the circumferentially intermittent portions of the disk 14.
Since the hole 15 is formed and arc welding is performed between the hole 15 and the rim 11, as illustrated in FIG. Even when stress concentrates near the point M and the moment M in the direction of the arrow acts, the stress is applied to the hole 1 formed in the parallel portion between the outer peripheral end 14a of the disk 13 and the rim 11.
5 and the part where the arc fillet weld 16 is applied,
As a result, repeated deformation is suppressed, fatigue of the joint portion is reduced, and the risk of breakage can be eliminated.

[0010]

As described above, according to the present invention, in the disc wheel in which the rising portion of the disc is fitted and welded to the inner peripheral surface of the rim, the intermediate portion of the rising portion of the disc is provided at the intermittent portion in the circumferential direction. Since a plurality of holes are formed and fillet welding is performed between at least a part of the holes and the inner peripheral surface of the rim, they are integrally assembled, so that the disc of Even if stress is concentrated near the outer edge, the stress is dispersed between the outer edge of the disk and the arc-welded part of the hole formed in the parallel part of the rim, and as a result, it is repeated. The deformation is suppressed, the fatigue of the joint portion is reduced, and the risk of breakage can be eliminated, whereby the durability strength as an automobile disc wheel can be significantly improved.

Further, in this case, in the disc wheel in which the rising portion of the disc is fitted and welded to the inner peripheral surface of the rim, a plurality of hole portions are provided at intermediate portions of the rising portion of the disc and at circumferentially intermittent portions. In addition, when the parts are formed integrally with each other by fillet welding between the portion of the hole near the hub hole of the disc and the inner peripheral surface of the rim, the coupling strength as the disc wheel is further improved. It can be further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part of a joint portion between a rim and a disk, which is one embodiment of the present invention.

FIG. 2 is an enlarged view showing a partially enlarged main portion of a joint portion between a rim and a disc shown in FIG.

FIG. 3 is a cross-sectional view showing a conventionally known joint structure of a rim and a disc.

FIG. 4 is an enlarged view showing a partially enlarged main portion of a joint portion between a rim and a disc shown in FIG.

[Explanation of symbols]

 11 rim 12 drop center portion 13 disc 14 rising portion 14a outer peripheral end portion of disc 15 hole portion 16 arc fillet weld portion

Claims (2)

[Claims] 1. A disc wheel in which a rising portion of a disc is fitted to an inner peripheral surface of a rim and welded and assembled,
A plurality of holes are formed at an intermediate portion of the rising portion of the disc at circumferentially intermittent portions, and fillet welding is performed between at least a part of the holes and the inner peripheral surface of the rim to integrally assemble the disc. Disc wheels for automobiles, which are characterized by being 2. A disc wheel in which a rising portion of a disc is fitted to an inner peripheral surface of a rim and welded and assembled,
Forming a plurality of holes at circumferentially intermittent positions at an intermediate portion of the rising portion of the disc, and performing fillet welding between a portion of the hole near the hub hole of the disc and the inner peripheral surface of the rim. A disc wheel for automobiles, which is characterized by being assembled together.