JP2001199201A - Automobile disc wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile disc wheel having a disc part for sufficiently reinforcing a rim part and capable of freely creating design of a disc surface. SOLUTION: This automobile disc wheel is divided into two parts in the shaft direction by a drop part of a rim, and is formed by joining an obverse side wheel part 2 and a reverse side wheel part 1 by joining parts by forming the joining parts 4, 5 in the drop part 3. This invention is the automobile disc wheel by joining the joining part 4 and the joining part 5 by rivet joining 6 or laser welding. This invention is the automobile disc wheel by welding (8) the inside of the joining parts, and is also the automobile disc wheel by applying air leakage preventive seal processing 9 to the outside (the tire installing side) of a contact plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile disk wheel. More specifically, the present invention relates to a disc wheel for automobiles provided with a joint at a drop portion of a rim.

[0002]

2. Description of the Related Art A disc wheel for an automobile comprises a rim for mounting a tire and a disc having a vehicle mounting portion. Usually, the rim portion and the disk portion are separately formed of a steel plate, and are integrally manufactured by welding. As shown in FIG. 5 (a partial cross-sectional view of an automobile disk wheel), a method of manufacturing an automobile disk wheel that has been mainly used for a long time includes a rim portion 21 and a disk portion 22 which are separately formed. This is a method of joining the disc portion 22 by fitting the disc portion 22 to the drop portion 23 of the rim portion 21 and intermittently or continuously welding 25 the joint portion over the entire circumference to integrate the welded portion-a so-called drop fitting type. . According to this method, the joining surface 24 when the disc portion 22 is fitted to the rim portion 21 has a considerable length in the axial direction and is formed in the axially flat drop portion 23. And the press-fitting effect increases. Therefore, the coupling portion (welded portion) 25 can be reinforced with high strength by the fitting of the disk portion 22.
However, in this method, the rim 21 and the disk unit 2
A large concave portion 26 is formed at the boundary between the two. Therefore, the appearance of the disk surface is poor in appearance (when viewed from the right side of the drawing), and the creation of the design of the disk portion is restricted by boundaries and recesses 26, so that the creation of the design cannot be freely performed. There is.

In recent years, the following joining method has been proposed in order to improve the drawbacks when the fitting is performed at the drop portion.
That is, as shown in FIG. 6 (a partial cross-sectional view of an automobile disk wheel), the separately formed rim portion 21 and the disk portion 22 are replaced by the bead portion 27 of the rim 21.
And a method in which the joint is intermittently or continuously welded 29 over the entire periphery to integrate the joint 29-a so-called bead fitting type. According to this method, since the disk portion 22 is fitted to the bead portion 27 of the rim 21,
Since the diameter of the disk portion 22 is increased and the concave portion 30 formed at the boundary between the rim portion 21 and the disk portion 22 is also reduced, the appearance (when viewed from the right side in the drawing) is improved, and the disk portion 22 is formed. Various designs can be easily created. However, on the other hand, the bead portion 27 of the rim 21
Is shorter in the axial direction than the drop portion 23,
There is a disadvantage that the joining surface 28 when the disc 22 is fitted to the rim 21 is small and the effect of press fitting is small, so that the rim 21 cannot be sufficiently reinforced with the disc 22.

Further, the following joining method has been proposed in order to improve the drawback when the fitting is performed at the drop portion.
That is, as shown in FIG. 7 (partial cross-sectional view of a disc wheel for automobiles), a method of joining the desk portion 22 to the tip of the bead portion 27 of the rim portion 21 and welding 32 the joint portion 31-a so-called full face Type-. In the case of this joining method, the design of the appearance of the disk wheel (when viewed from the right side of the drawing) may be considered because the design of the surface of the disk portion 22 may be considered.
However, the joining surface 31 between the rim portion 21 and the disc portion 22 is extremely small because it has only the thickness of the rim material plate, and the joining portion between the two is merely joined. Burden is great. The strength of this weld may be the weakest part of the wheel, and it has been difficult to reliably and sufficiently reinforce the rim 21 with the disk 22.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of the above circumstances, and has a disk portion which reliably and sufficiently reinforces a rim portion, and in which a disk surface design can be freely created. The purpose is to provide wheels.

[0006]

That is, according to the present invention, a drop portion of a rim is divided into two parts in an axial direction, and a joint portion is formed at the drop portion, and a front wheel portion and a rear wheel portion are formed at the joint portion. An automobile disc wheel, wherein the disc wheel is combined. The present invention is also an automobile disc wheel in which the above-mentioned joints are joined by rivet joining or laser welding. The present invention also provides the above-described automobile disc wheel, wherein the inside of the joint is welded to the automobile disc wheel, and further, the outside of the joint surface (the tire mounting side) is subjected to an air leakage prevention seal treatment. .

[0007]

FIG. 1 is a sectional view of an embodiment of the present invention. That is, in a disc wheel for automobiles, which is divided into two in the axial direction at the drop portion of the rim, each of the joint portions is formed at the drop portion, and the front wheel portion and the rear wheel portion are joined at the joint portion. It is sectional drawing at the time of joining parts by rivet connection. In FIG. 1, reference numeral 1 denotes a rear wheel portion (mainly a portion forming a rim), and 2 denotes a front wheel portion (mainly a portion forming a disk). 3 is a drop part of a rim.
Reference numeral 4 denotes a joint portion of the rear wheel portion 1 formed in the drop portion, which is formed by using the wall of the drop portion of the rim to be slightly raised or extended. Reference numeral 5 denotes a joint formed on the front wheel portion 2. The joint 4 and the joint 5 form a joint surface 6. The disc wheel for an automobile of the present invention is axially divided at the joining surface 6 into the front wheel portion 2 and the rear wheel portion 1. In the present invention, since the wall of the drop portion of the rim is used, the joining portions 4 and 5 can be enlarged so that the joining surface 6 can be enlarged so that joining by rivet joining becomes possible. Reference numeral 7 denotes a rivet, which connects the joint 4 and the joint 5 to integrate the front wheel 2 and the rear wheel 1 together. Preferably, the rivets 7 are equally spaced in the circumferential direction. The number of rivets is arbitrary, but preferably 8 to 16.
The rivet is provided at a position that does not interfere with the valve.

The joining portion 4 and the joining portion 5 can be joined by the rivet joining, and the front wheel 2 and the back wheel 1 can be integrated. In the present invention, the joining portion 4 and the joining portion 5 are connected. It is preferable to weld the inner part of the joining surface 6 that touches. Reference numeral 8 denotes this welded portion. This welding is performed intermittently or continuously over the entire circumference in consideration of design strength. The riveted joints prevent peeling of the joint surfaces, and the welding makes the rivet joints stronger. By these connecting means, the front wheel 2 and the rear wheel 1 can be integrally connected, but when the tire is mounted on the rim portion, there is a possibility that air leaks from the rivet connection portion or the welded portion. In such a case, as shown in FIG. 3, it is preferable to apply an air leakage prevention seal material 9 over the entire circumference (on the tire mounting side) of the joint. As the air leakage prevention seal material, a silicone rubber seal material or the like is used.

FIG. 3 is a sectional view of another embodiment of the present invention. That is, the rim is divided into two in the axial direction at the drop part,
FIG. 5 is a cross-sectional view of a vehicle disk wheel in which each joint is formed on the drop portion and the front wheel portion and the rear wheel portion are joined at the joint portion when the joint portions are joined by laser welding. In FIG. 3, reference numeral 1 denotes a back wheel portion, and 2 denotes a front wheel portion. 3 is a drop part of a rim. Reference numeral 4 denotes a joint portion of the rear wheel portion 1 formed on the drop portion, and it is preferable to make the wall of the drop portion of the rim slightly rise or extend. Reference numeral 5 denotes a joint formed on the front wheel portion 2. The joint 4 and the joint 5 form a joint surface 6. The disc wheel for an automobile is divided axially at the joining surface 6 into a front wheel portion 2 and a rear wheel portion 1. In the present invention, the joints 4 and 5 are enlarged so that the joint by laser welding becomes possible, and the joint surface 6 is enlarged. Reference numeral 10 denotes a laser weld for joining and integrating the joint 4 and the joint 5.

In FIG. 3, two laser welds 10 are applied in the radial direction of the wheel. The number of the laser welds 10 in the wheel radial direction may be one or two or more in consideration of the design strength and the width of the joint surface. Further, the laser welding may be such that a welded portion is partially arranged in the circumferential direction, or may be a full-circumferential welding performed continuously over the entire circumference. When the entire circumference is welded, air leakage when the tire is mounted is eliminated, so that the entire circumference welding is preferably used. The front side wheel 2 can be integrally connected to the back side wheel part 1 by the laser welding 10 of this joint, and the load on one welding part can be reduced by performing a plurality of laser weldings.

In the above example, especially when the laser welding portion is partially disposed in the circumferential direction, as shown in FIG. 1, the joining surface 6 where the joining portion 4 and the joining portion 5 are in contact with each other.
It is preferable to weld the inner portion of the slab and provide a welded portion 8 to strengthen the connection. When laser welding is not performed on the entire circumference, as shown in FIG. 2, an air leak prevention sealing material 9 is provided on the outside of the joint portion (on the side where the tire is mounted) so that air leakage when the tire is mounted is eliminated. It is preferably applied over the entire circumference.

The automobile disk wheel of the present invention is manufactured as follows. That is, the rear wheel portion 1 as shown in FIG. 4A is formed from a steel plate. At this time, care is taken so that the joint portion 4 is formed on the wall of the drop portion 3 of the rim. Further, the front wheel portion 2 as shown in FIG. 4B is formed from a steel plate. At this time, care should be taken so that a joint portion 5 that is surface-joined to the joint portion 4 of the back wheel portion 1 is formed on the disk portion of the front wheel. When the joining portions are joined by rivet joining, holes for inserting rivets are provided at predetermined positions of the joining portions 4 and 5. Thereafter, the front wheel portion 2 and the rear wheel portion 1 are joined at the joining portion, and rivet joining or laser welding is performed by a conventional method. Further, if necessary, a welding process inside the joint portion and / or a sealing material treatment for preventing air leakage outside the joint portion (on the side where the tire is mounted) is performed by a conventional method to obtain a product.

[0013]

With the bead fitting type and full face type of the conventional design wheel, in the strength test,
Although the strength of the wheel was often affected by the cracks in the weld, in the present invention, the front wheel and the back wheel can be firmly connected to form an integral structure by dividing at the drop part of the rim , And does not have this disadvantage. That is, in the present invention, since the wall surface of the drop portion of the rim is used as the joint, the joint surface of the joint between the front wheel and the rear wheel can be widened, and the joint can be riveted or laser-welded. As a result, a strong connection can be achieved, and the load on the welded portion can be reduced. As a result, the life of the wheel can be improved.

In addition, by adopting the above-mentioned shape, the front side wheel forms the appearance as it is, so that there is more freedom in the design of the disc portion than in the conventional drop-fitting wheel, and it is excellent in so-called high designability. There are advantages. In the case where rivets are joined at the drop portion of the rim, an air leakage prevention seal treatment is performed on the entire outside of the joint portion (on the side where the tire is mounted) so that an automobile disk wheel without air leakage when the tire is mounted. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of an automobile disk wheel according to the present invention.

FIG. 2 is a sectional view showing another example of the automobile disk wheel of the present invention.

FIG. 3 is a sectional view showing another example of the automobile disk wheel of the present invention.

FIG. 4 is a sectional view showing an example of a manufacturing process of the automobile disk wheel of the present invention.

FIG. 5 is a partial sectional view showing an example of a conventional automobile disk wheel.

FIG. 6 is a partial sectional view showing an example of a conventional automobile disk wheel.

FIG. 7 is a partial sectional view showing an example of a conventional automobile disk wheel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Back wheel, 2 front wheels, 3 drop parts, 4, 5 joint parts, 6 joint surfaces, 7 rivets, 8 weld parts, 9 seal materials, 10 laser welded parts, 21 rims, 22 discs, 23 drop parts, 24, 27,
31 joint surfaces, 25, 29, 32 welds

Claims (5)

[Claims] 1. An automotive vehicle characterized in that the rim is divided into two parts in the axial direction at a drop part, a joint part is formed at the drop part, and the front wheel part and the rear wheel part are joined at the joint part. Disk wheel. 2. The disc wheel for an automobile according to claim 1, wherein the joining portions are joined by rivet joining. 3. The automobile disc wheel according to claim 1, wherein the joints are joined by laser welding. 4. The disk wheel for an automobile according to claim 1, wherein the inside of the joint is welded. 5. An air leakage prevention seal treatment is applied to the outside of the joint (the tire mounting side).
4. The disc wheel for an automobile according to any one of 4.