JPH0848105A - Two-piece wheel for automobile and method of manufacturing the same - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently and inexpensively mass-produce a large number of parts with a small number of parts, to accurately connect the rim and wheel. Easily adjust tire width and offset to mass-produce a wide variety of two-piece wheels at low cost. [Structure] An outer rim 1A is connected to an inner rim-integrated disc 6 in which an inner rim 1B and a disc 2 are integrally molded. The inner rim integrated disk 6 has a male screw 7 on the outer circumference, and the outer rim 1A has a female screw 8 on the inner circumference. The female screw 8 is screwed into the male screw 7 to form the outer rim 1A.
And the inner rim-integrated disc 6 are connected, and both are fixed by welding. The outer rim 1A is replaced with one having a different width to adjust the tire width, and the mounting surface 6B of the inner rim integrated disc is cut to adjust the offset.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-piece wheel for an automobile.

[0002]

2. Description of the Related Art The sectional structure of a conventional two-piece wheel is shown in FIGS. The two-piece wheel shown in FIG. 1 is manufactured by separately manufacturing a cylindrical rim 1 and a disc 2, press-fitting the disc 2 into the rim 1, and welding along the boundary.

The two-piece wheel shown in FIG. 2 also manufactures a cylindrical rim 1 and a disc 2 separately, and forms a flange 3 on the inside of the rim 1 by projecting the flange 3 and the disc 2. It is manufactured by connecting the disc 2 to the rim 1 with a number of piercing bolts 4 penetrating the outer periphery.

Further, in the two-piece wheel shown in FIG. 3, an outer rim 1A and a disk 2 are integrally formed to form an outer rim integrated disk 5, and an inner rim 1
B is connected. The outer rim integrated disk 5 and the inner rim 1B have a large number of piercing bolts 4
Are connected with each other, and the boundaries are welded together for reliable connection.

[0005]

In the two-piece wheel having the structure shown in FIG. 1, the disc 2 is pressed into the fixed position of the rim 1 and welded, so that the connecting position of the disc 2 and the rim 1 can be adjusted accurately. difficult. Therefore, there is a drawback that the connecting position of the disc 2 and the rim 1 is displaced, or the wheel is shaken.

The two-piece wheel shown in FIGS. 2 and 3
Since the disks 2 are connected by using dozens of pierce bolts 4, there is a drawback that the manufacturing is troublesome and the number of parts is large. Further, since the connection is made by the piercing bolts 4, the flange 3 needs to be provided. Since the pierce bolt 4 projects inward from the flange 3, the wheel having a structure in which the pierce bolt 4 penetrates the flange 3 has a disadvantage that the inner diameter becomes substantially small. A brake is built inside the wheel. When the inside diameter of the wheel is small, there is a problem that the inside of the wheel hits the brake caliper or the like. In order to avoid this adverse effect, it is required to provide a necessary gap between the inside of the wheel and the brake caliper and the like.
However, to achieve this, it is necessary to design the brake discs small or to mount wheels with large diameters. However, when the brake disk is reduced, the braking performance becomes worse, and when the diameter of the wheel is increased, the outer diameter of the tire is also increased. When a large wheel is mounted with the same outer diameter of the tire, it is necessary to change the flatness of the tire, and there is a disadvantage that characteristics such as handling are changed.

In addition, in the two-piece wheel shown in FIGS. 1 and 2, when coloring the outer rim 1A, it is necessary to coat the entire portion including the inner rim 1B or mask the portions not requiring coloring. is there.
Therefore, there is also a drawback that it takes a lot of time to color the outer rim 1A.

By the way, it is necessary to manufacture a two-piece wheel for an automobile in accordance with the width and offset of the tire to be mounted. Tire widths and offsets vary widely depending on the vehicle in which they are installed. In the wheel shown in FIG. 1, it is necessary to change the rim 1 when the tire width changes and to change the connecting position between the rim 1 and the disc 2 when the offset changes. Therefore, it is necessary to prepare a large number of rims 1 having different widths so as to fit the tire width. In addition, it is very difficult to change the connection position of the rim 1 and the disc 2 and accurately connect them to each other at a fixed position.

Further, in the wheel shown in FIG. 2, it is necessary to prepare more rims 1 according to the tire width and the offset. The rim 1 to be used is changed when the tire width changes, and the rim 1 to be used even if the offset changes.
Because it changes.

In the wheel having the structure shown in FIG. 3, the tire width can be adjusted by changing the inner rim 1B. Since the width of the inner rim 1B is narrower than that of the rim 1, the tire width can be easily adjusted as compared with the method of replacing the entire rim 1 according to the tire width. However, in order to change the offset, it is necessary to change the outer rim integrated disc 5. Therefore, it is necessary to prepare a large number of outer rim-integrated discs in accordance with the optimum offset for the mounted vehicle. With this structure of wheels, it is difficult to inexpensively mass-produce two-piece wheels for a wide variety of automobiles.

The present invention was developed for the purpose of eliminating these drawbacks of the conventional two-piece wheel. An important object of the present invention is to enable efficient mass production with a small number of parts and to provide a rim. It is to provide a two-piece wheel for an automobile, in which the wheel and the wheel can be accurately connected without displacement.

Still another important object of the present invention is to provide a two-piece wheel for an automobile which can be designed to have a large inner diameter and can easily color the outer rim.

Further, another important object of the present invention is to provide a method for manufacturing a two-piece wheel for an automobile, by which tire width and offset can be easily adjusted to inexpensively mass-produce a wide variety of two-piece wheels. is there.

[0014]

The two-piece wheel for an automobile according to the present invention has the following constitution in order to achieve the above-mentioned object. A two-piece wheel for an automobile includes an inner rim integrated disc 6 in which an inner rim 1B and a disc 2 are integrally formed, and an outer rim 1A connected to the inner rim integrated disc 6. The inner rim integrated disc 6 has a male screw 7 on the outer periphery thereof, and the inner rim of the outer rim 1A has a female screw 8 screwed into the male screw 7 of the inner rim integral disc 6. Outer rim 1
The female screw 8 of A is replaced with the male screw 7 of the disc 6 integrated with the inner rim.
The outer rim 1A and the inner rim-integrated disc 6 are connected by being screwed in. Furthermore, outer rim 1A
The inner rim integrated disc 6 and the inner rim integrated disc 6 are securely connected by welding.

Further, the two-piece wheel according to claim 2 of the present invention is provided with a flange 3 which projects to the outer periphery of the inner rim-integrated disc 6 and specifies a stop position where the outer rim 1A is screwed into the inner rim-integrated disc 6.

Further, in the method of manufacturing a two-piece wheel for an automobile according to claim 3 of the present invention, in order to easily change the tire width and the offset of the wheel, the wheel is manufactured by the following steps. . Process of manufacturing inner rim integrated disc 6 formed by integrally molding inner rim 1B and disc 2 Process of manufacturing outer rim 1A connected to inner rim integrated disc 6 separately from inner rim integrated disc 6 Outer rim 1A The step of connecting the inner rim-integrated disc 6 with the inner rim-integrated disc 6 is performed by cutting the mounting face of the inner rim-integrated disc 6 and adjusting the offset.
However, the step of cutting the mounting surface 6B of the inner rim-integrated disc is not necessarily limited to the state in which the outer rim 1A and the inner rim-integrated disc 6 are connected. It is also possible to cut the mounting surface 6B of the inner rim integrated disk before connecting.

[0017]

In the two-piece wheel for an automobile of the present invention, the outer rim 1A is screwed into the inner rim integrated disc 6 to form the outer rim 1A and the inner rim integrated disc 6.
And are connected in place. In this state, the outer rim 1A
The inner rim-integrated disc 6 is welded and securely fixed. The inner rim-integrated disc 6 having the flange 3 on the outer periphery is such that the outer rim 1A is attached to the inner rim-integrated disc 6 until the tip of the outer rim 1A collides with the flange 3.
Screwed in. The inner rim integrated disc 6 without the flange 3 has a female screw 8 and a male screw 7 so that when the outer rim 1A is screwed in to the end, the both discs are connected to each other at correct positions.
And are provided.

In the two-piece wheel of this structure, the outer rim 1A is screwed into the inner rim integrated disc 6,
After that, by welding the both, it is possible to mass-produce easily and easily and efficiently. Further, since the outer rim 1A and the inner rim integrated disk 6 are positioned by the female screw 8 and the male screw 7, the connecting position does not shift. Furthermore, since the inner rim 1B is integrally molded with the disc 2 and the outer rim 1A is screwed and welded thereto, the rim 1 can be made tough. Outer rim 1A
This is because the inner rim 1B having a wider width is integrally formed with the disc 2 and the outer rim 1A is fixed by welding.

Further, in the method for manufacturing a two-piece wheel of the present invention, the tire width is changed on the outer rim 1A, and the cutting amount of the mounting surface 6B of the inner rim integrated disc is adjusted to change the offset. The outer rim 1A is narrower than the inner rim 1B. In the method for manufacturing a two-piece wheel of the present invention, the tire width can be changed by exchanging the outer rim 1A having a narrow width, so that the tire width adjustment cost can be reduced. This is because the tire width can be changed by preparing several kinds of outer rims 1A having a narrow width. Further, since the offset is changed by the cutting amount of the mounting surface 6B of the inner rim integrated disc, the offset can be changed without changing the inner rim integrated disc 6. Therefore, the method for manufacturing a two-piece wheel of the present invention is characterized in that a plurality of types of outer rims 1A having a narrow width are prepared, and a wide variety of wheels having different tire widths and offsets can be efficiently mass-produced.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a two-piece wheel for an automobile for embodying the technical idea of the present invention, and the present invention does not specify the two-piece wheel for an automobile to the following.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

The two-piece wheel for an automobile shown in the sectional view of FIG. 4 includes an inner rim integrated disc 6 in which an inner rim 1B and a disc 2 are integrally molded, and an outer rim 1A connected to the inner rim integrated disc 6. Equipped with. Inner rim integrated disk 6 and outer rim 1
A is formed by molding a metal such as aluminum or magnesium. The inner rim integrated disk 6 is
Since B is cut into a plane to adjust the offset, it is formed thick as shown by the chain line. The center portion of the disk has a screw hole 9 opened. Inner rim integrated disk 6
Can be manufactured by a casting method or a forging method. Outer rim 1A
Can be manufactured by a method such as casting, forging, and roll forming.

A male screw 7 is provided on the outer periphery of the inner rim-integrated disc 6, and a female screw 8 is provided on the inner periphery of the outer rim 1A. The female screw 8 of the outer rim 1A is provided at a position where it can be screwed into the male screw 7 of the inner rim integrated disk 6 to connect the outer rim 1A to the fixed position of the inner rim integrated disk 6. The male screw 7 and the female screw 8 can be provided by forming the inner rim integrated disk 6 and the outer rim 1A, and then cutting with a lathe or machining.

The two-piece wheel shown in FIGS. 4 and 5 is
At the lower end of the male screw 7 provided on the inner rim-integrated disc 6, a flange 3 protruding to the outer periphery is provided. The outer rim 1A is connected to the inner rim integrated disk 6 by the flange 3.
The stop position for screwing into the outer rim 1
It is also used in the welded part for welding A. When the flange 3 is provided on the outer circumference of the inner rim-integrated disc 6 and the outer rim 1A is welded thereto, the connecting portion between the outer rim 1A and the inner rim-integrated disc 6 can be strengthened.

The two-piece wheel for an automobile shown in FIG. 4 is manufactured by the following steps. The inner rim integrated disk 6 is manufactured by molding aluminum or the like. Inner rim integrated disc mounting surface 6
B is formed thick so that the offset can be adjusted by cutting. The outer rim 1A is manufactured by molding aluminum or the like. In order to change the tire width, a plurality of types of outer rims 1A having different widths are manufactured. Male screw 7 on the outer circumference of inner rim integrated disk 6,
A female screw 8 is machined on the inner periphery of the outer rim 1A. The female screw 8 of the outer rim 1A is screwed into the male screw 7 of the inner rim integrated disk 6 to connect the outer rim 1A to the inner rim integrated disk 6. The entire circumference of the wheel of FIG. 4 is welded along the boundary between the inner rim integrated disk 6 and the outer rim 1A, and the boundary between the flange 3 of the inner rim integrated disk 6 and the outer rim 1A. Is fixed. The mounting surface 6B of the inner rim integrated disc is cut into a flat shape to adjust the wheel offset. The process of can be performed any time after the process of. However, at the end of this step, the wheels are stocked without cutting the mounting surface 6B, and if there is an order, the wheels can be adjusted for offset and shipped, so that the number of stocks can be reduced. Screw hole 9 at the center of inner rim integrated disk 6
Cut and finish.

[0026]

The automobile two-piece wheel of the present invention has the feature that it can be mass-produced efficiently and inexpensively with a small number of parts. It can be used without piercing bolts
This is because the inner rim-integrated disc and the outer rim are screwed together and connected, and in this state, both are fixed by welding. Further, a notable feature of the two-piece wheel of the present invention is that the inner rim integrated disk and the outer rim can be accurately fixed without displacement even though mass production is possible at low cost. This is because the outer rim is screwed into the inner rim-integrated disc to be positioned, and is welded and fixed in this state, instead of being press-fitted and positioned as in the conventional case.

Further, the two-piece wheel of the present invention has a feature that the inner diameter can be increased to effectively prevent the brake caliper and the like from colliding with the wheel. Therefore, there is a feature that the brake caliper or the like can be prevented from hitting the wheel when used in an automobile equipped with a recent brake disc having a large outer diameter.

Furthermore, the method for manufacturing a two-piece wheel of the present invention can easily adjust the tire width and the offset, and realizes an extremely excellent feature that a wide variety of two-piece wheels can be mass-produced at low cost. This is because the tire width can be adjusted by changing the width of the outer rim fixed to the inner rim integrated disc, and the offset can be changed by adjusting the cutting amount of the mounting surface of the inner rim integrated disc. In particular, the outer rim is narrower than the inner rim, so it is possible to reduce the cost increase by preparing many outer rims with different widths. This is because the amount of material used is small, yet small and not bulky. If a large number of wide inner rims are stocked, a large amount of materials will be used, and it will be difficult to be bulky and low cost when stocked. Further, in the method for manufacturing a two-piece wheel of the present invention, the width of the outer rim having a small width is replaced to adjust the tire width, so that the strength of the rim portion can be increased. This is because the wide inner rim can be made to be strong as an integrated structure with the disc. further,
Since the two-piece wheel of the present invention adjusts the offset by cutting the mounting surface of the inner rim integrated disc, it is not necessary to prepare various kinds of inner rim integrated discs having different offset values, and wheels with different offsets can be produced at low cost. There is a feature that can be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional two-piece wheel connecting a rim and a disk by welding.

FIG. 2 is a sectional view of a conventional two-piece wheel in which a rim and a disc are connected by a pierce bolt.

FIG. 3 is a sectional view of a conventional two-piece wheel in which an outer rim integrated disc and an inner rim are connected by piercing bolts and fixed by welding.

FIG. 4 is a sectional view of a two-piece wheel according to an embodiment of the present invention.

5 is an exploded perspective view of the two-piece wheel shown in FIG.

[Explanation of symbols]

1 ... rim 1A ... outer rim 1B ...
Inner rim 2 Disc 3 Flange 4 Pierce bolt 5 Outer rim integrated disk 6 Inner rim integrated disk 6B Mounting surface 7 Male screw 8 Female screw 9 Screw hole

Claims (3)

[Claims] 1. An inner rim integrated disk (6) in which an inner rim (1B) and a disk (2) are integrally formed, and an outer rim connected to the inner rim integrated disk (6)
(1A), a male screw (7) is provided on the outer periphery of the inner rim integrated disc (6), and a female screw (8) is screwed on the male screw (7) on the inner periphery of the outer rim (1A). The outer rim (1A) female screw (8) is attached to the inner rim integrated disc.
The outer rim (1A) and the inner rim integrated disc (6) are connected by screwing into the male screw (7) of (6).
A two-piece wheel for automobiles, in which the outer rim (1A) and the inner rim integrated disc (6) are welded and connected. 2. A flange (3) which protrudes to the outer periphery of the inner rim integrated disc (6) and specifies a stop position at which the outer rim (1A) is screwed into the inner rim integrated disc (6). Two-piece wheels for automobiles described in. 3. A step of manufacturing an inner rim integrated disc (6) formed by integrally molding an inner rim (1B) and a disc (2), and an outer rim (6) connected to the inner rim integrated disc (6). 1A) manufacturing process and outer rim
A method for manufacturing a two-piece wheel for an automobile, comprising a step of connecting (1A) to an inner rim integrated disc (6) and a step of adjusting an offset by cutting a mounting surface of the inner rim integrated disc (6).