JP2000168302A - Wheel for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel for automobile excellent in strength and product accuracy. SOLUTION: A wheel for automobile comprises a drop part 11, side wall parts 13a and 13b, bead seat parts 14a and 14b, a rim 10 having flange parts 15a and 15b, and a disk which comprises a shaped body formed with flat-shaped disk material and has a disk flange part 24 which extends generally in parallel with a disk axis and is discontinuous in circumferential direction of the disk. The rim 10 is connected to the disk 20 through a ring-shaped member 30 connected to a disk flange part end surface and a rim inner peripheral surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile wheel in which a rim and a disk are connected by a ring-shaped member.

[0002]

2. Description of the Related Art Generally, automobile wheels are required to be reduced in weight, and various methods have been conventionally used to reduce the weight. However, each method has advantages and disadvantages,
Few satisfy all of weight reduction, manufacturing cost, and product accuracy. For the purpose of weight reduction and reduction of the amount of material used, there are a square wheel and a spoke type wheel in which a disc flange is not continuous in a circumferential direction. For a square wheel or a spoke type wheel, a disk obtained by punching a disk material from a flat plate and subjecting the disk material to at least one step of pressing or drawing is used.

[0003]

However, the conventional vehicle wheel has the following problems. For wheels (square wheel, spoke type wheel) whose disc flange is not continuous in the circumferential direction, the tip of the flange tends to fluctuate in the axial direction during disc formation, so the disc flange is pressed into the bead seat inner peripheral surface of the rim. In this case, the diameter of the bead seat portion varies non-uniformly in the circumferential direction, and it has been difficult to manufacture a wheel having high product accuracy (mainly, runout accuracy). Also, even if the disc flanges are made to have the same height by cutting, etc., differences such as differences in frictional resistance when press-fitting into the rim inner peripheral surface remain in the rim bead seat and disc flanges, and product accuracy is reduced. I could hardly improve. Also, since arc welding is performed directly on the disk flange where the tip position varies in the axial direction, aim one end of the disk flange evenly when rotating one of the wheel or welding torch around the wheel axis with respect to the other. , Welding defects such as poor welding are liable to occur, and it is difficult to obtain the bonding strength between the disk and the rim. An object of the present invention is to provide an automobile wheel having excellent strength and high product accuracy.

[0004]

The present invention for achieving the above object is as follows. (1) A rim having a drop portion, a side wall portion, a bead seat portion, and a flange portion, and a molded product of a flat disc material, and a disc flange portion extending substantially parallel to the disc axis and discontinuous in the disc circumferential direction. Wherein the rim and the disk are connected via a ring-shaped member joined to an end surface of the disk flange and an inner peripheral surface of the rim. For wheels. (2) The vehicle wheel according to (1), wherein the joining between the ring-shaped member and the end face of the disk flange is friction joining by reciprocating rotation.

[0005] In the automobile wheel of the above (1) or (2), even if the tip position of the disc flange varies in the axial direction of the wheel, the tip position of the disc flange can be made uniform by using a ring-shaped member. In this state, the disc can be joined to the rim inner peripheral surface via the ring-shaped member. Therefore, poor welding hardly occurs, and the bonding strength is stabilized. In addition, even when the disk flange is welded to the inner peripheral surface of the bead seat portion of the rim, the influence of welding is less likely to occur on the outer peripheral surface of the bead seat portion of the rim, and the product accuracy is improved.

[0006]

1 to 3 show a vehicle wheel according to a first embodiment of the present invention, and FIGS. 4 and 5 show a vehicle wheel according to a second embodiment of the present invention. 6 is applicable to both embodiments. Portions common to both embodiments are denoted by the same reference numerals in both embodiments. First, the configuration and operation of a portion common to both embodiments of the present invention will be described with reference to FIGS. As shown in FIG. 1, the vehicle wheel of the present invention includes a rim 10, a disk 20, and a ring-shaped member 30 connecting the rim 10 and the disk 20.

At the center of the rim 10 in the axial direction, there are provided drop portions 11 for dropping one bead of the tire when the tire (not shown) is mounted.
The sidewall portions 13a and 13b are formed continuously. The sidewall portions 13a and 13b and the drop portion 11 are connected by drop connection portions 12a and 12b, respectively. The drop connecting portions 12a and 12b
It is formed in an R shape. Sidewall portions 13a, 1
3b, the bead seat portions 14a, 1
Reference numeral 4b extends outward in the rim axial direction, and flange portions 15a, 15b extend from the respective bead seat portions 14a, 14b to outer ends in the rim axial direction.

The disk 20 is formed by pressing or drawing a flat disk material. Disk 20
A hub hole 21 is provided at the center in the radial direction, and a hub mounting portion 22 is provided around the hub hole 21. The hub mounting portion 22 is provided with a plurality of bolt holes 23 at equal intervals in the circumferential direction. By inserting a hub bolt (both not shown) extending from the hub into the bolt hole 23 and screwing a hub nut (not shown) into the hub bolt, the wheel becomes
The disk is fixed to the hub at the position of 20. Disk 20
A disk flange 24 is formed at the outer peripheral end of the rim 10 to rise inward in the axial direction of the rim 10. Generally, when the disc flange portion 24 is not continuous in the circumferential direction,
The axial tip position of the disc flange 24 varies.

The disk flange 24 has an inner edge 40 in the wheel axial direction. Disc flange 24
The inner edge 40 in the wheel axial direction is a plurality of general portions 40a.
And a plurality of ventilation portions 40b as decorative holes. Each general portion 40a is located in a plane orthogonal to the disk axis and extends in the disk circumferential direction. Each ventilation portion 40b is located between adjacent general portions 40a, and is concavely curved outward in the wheel axial direction from a plane orthogonal to the disk axis including the general portion 40a.

The ring-shaped member 30 is located in one plane perpendicular to the axis, has a perfect circle or a shape close to a perfect circle without undulation in the radial direction, and has a substantially circular or rectangular cross section. The disk flange 24 is located on substantially the same circumference as the inner edge 40 in the wheel axial direction. The general portion 4 of the inner edge 40 in the wheel axial direction of the disc flange portion 24
Oa is joined to the inner peripheral surface of the rim 10 via the ring-shaped member 30. The joining between the ring-shaped member 30 and the general portion 40a of the inner edge 40 in the wheel axial direction of the disk flange portion 24 is welding or friction joining. In the case of welding, the welding is completely penetration welding to obtain the strength of the wheel. Is desirable.

The annular member 30 and the disk flange 24
When the joining between the general portion 40a of the inner edge 40 in the wheel axial direction and the general portion 40a is friction joining, a coupling device 50 for obtaining such a case.
An example of the method will be described with reference to FIG. The coupling device 50 has an upper part 50a and a lower part 50b. The upper part 50a has a clutch 57 and a reciprocating rotary shaft 58. The lower portion 50b includes a wheel mounting jig 51 for mounting the ring member 30, a wheel clamp jig 52 for gripping the ring member 30 at a portion corresponding to wheel ventilation, and a disk 2
0, and a screw hole 53 provided in the work receiver 53 through the bolt hole 23 of the disc 20.
a, a work fixing bolt 54 for fixing the disk 20 by being screwed into the a, an outer diameter clamp jig 55 for pressing the disk flange portion 24 from outside, and a pressing pad 56 for stabilizing the fixing of the disk 20. . The coupling device 50 includes the disk flange portion 24 and the annular member 30.
A pressurizing cylinder 59 that is attracted to and pressed against the side is disposed.

First, the annular member 30 is placed on the wheel mounting jig 51, and the annular member 30 is gripped and fixed by the wheel clamp jig 52. The disk 20, which is a work, is placed in the work receiver 53, and the disk 20 is fixed with the work fixing bolt 54.
Press the outer diameter clamp jig 55 against the work receiver 53 side,
The disk flange 24 is fixed. At this time, the disc 20 is being pressed by the press pad 56. However, the press pad 56 may not be provided. Next, when the entire lower portion 50b is raised to a predetermined position (the position of the holding pad 56 indicated by a two-dot chain line in FIG. 6) by a positioning cylinder (not shown), the upper portion 50a and the lower portion 50b are joined. When the upper portion 50a and the lower portion 50b are connected, the driving force of a motor (not shown) is transmitted to the reciprocating rotary shaft 58, and the disk 57, which is a work, is reciprocally rotated on the annular member 30 by connecting the clutch 57. And you get a fever. When the disk 20 is pulled toward the ring member 30 by the pressure cylinder 59 during or after the temperature rise, the disk flange portion 24 and the ring member 30 are frictionally joined. Since the ring-shaped member 30 is supported and fixed by the wheel mounting jig 51 and the wheel clamp jig, friction joining with the disk flange portion 24 becomes possible, and undulation does not occur. In addition, even if there is some variation in the height of the disk flange portion 24, the height of the disk flange portion 24 that has been pressed against the annular member 30 first is removed because the annular member 30 or the disk flange portion 24 is scraped off during friction welding. , Naturally aligned. Therefore,
The ring-shaped member 30 after the friction welding has no undulation and is a perfect circle. Here, when the outer periphery of the work receiver 53 is formed into a blade shape, it is possible to remove burrs on the inner peripheral side of the disk flange generated at the time of joining by further pulling the disk 20 by the pressing cylinder 59 after the coupling. Thereafter, the work fixing bolt 54 and the outer diameter clamp jig 55 are loosened, and the disk 20 to which the ring-shaped member 30 is connected is connected to the connecting device 5.
Remove from 0 to complete the joining.

In the above, the case where the annular member 30 is joined to the disk flange portion 24 before being joined to the inner peripheral surface of the rim 10 has been described. Even in the case of joining to the flange portion 24, if the rim 10 to which the ring-shaped member 30 is joined is gripped instead of gripping the ring-shaped member 30, it can be joined by a method using the same coupling device 50. is there. Further, in the illustrated example, the cross section of the ring-shaped member 30 is a substantially circle, but may be a rectangular cross section.

Next, the operation will be described. Ring member 30
Is welded or friction-bonded to the inner edge 40 in the wheel axial direction of the disc flange portion 24 before being welded to the inner peripheral surface of the rim 10, the connection should be made in a large space outside the rim 10. Can be done easily.
In addition, it is possible to finish this welded portion with a cutting tool or the like before joining with the rim 10, and it is possible to provide a wheel excellent in appearance. When welding the disk flange portion 24 to which the ring-shaped member 30 is joined to the inner peripheral surface of the rim 10,
As in the conventional case, welding can be performed by MAG welding (carbon dioxide gas arc welding) or the like.

The annular member 30 is connected to the disk flange 24
Before being welded to the inner peripheral surface of the rim 10,
The annular member 30 is pressed into the inner peripheral surface of the rim 10 and welded.
Thereafter, the ring-shaped member 30 is joined to the disk flange portion 24 by welding or friction welding with complete penetration. When the annular member 30 is simultaneously joined to both the disk flange 24 and the inner peripheral surface of the rim 10, first, the annular member 30 is press-fitted or inserted into the inner peripheral surface of the rim 10, and the inner side of the disk flange 24 in the wheel axial direction. The general portion 40 a of the edge 40 is brought into contact with the ring-shaped member 30. As shown in FIG. 3, a space is provided at the triple point of the rim 10, the disk 20, and the ring-shaped member 30, and the laser is focused on the space from outside the rim 10 and welded. The rim 10, the disk 20, and the ring-shaped member 30 are joined in a state of being almost completely melted.

In the present invention, the disc 20 and the rim 10
Since the disk flange portion 24 is connected via the ring-shaped member 30, even if the disk has a variation in the axial height of the disk flange portion 24,
The disc flange portion 24 can be connected to the inner peripheral surface of the rim 10 in a state where the variation is reduced or eliminated by the ring-shaped member 30 and the height of the disc flange portion 24 is substantially uniform. As a result, welding defects such as poor welding are unlikely to occur, and the disc flange portion 24 is
Even if it is connected to the bead seat part 1
4b hardly occurs on the outer peripheral surface, and the product accuracy is improved.

Next, parts unique to each embodiment of the present invention will be described. In the first embodiment of the present invention, as shown in FIGS. 1 and 2, the disc 20 has three disc flanges 24.
(A so-called delta disk wheel), the disk flange portion 24 is coupled to the bead seat portion 14b of the rim 10 via the ring member 30, and the cross section of the ring member 30 is substantially circular. Is shown. In the first embodiment of the present invention, the inner edge 40 in the wheel axial direction of the disc flange portion 24 includes three general portions 40a and three ventilation portions 40b. Each general portion 40a is located in a single plane orthogonal to the disk axis and extends in the disk circumferential direction. Each ventilation portion 40b is located between adjacent general portions 40a, and is concavely curved outward in the wheel axial direction from a plane orthogonal to the disk axis including the general portion 40a. As shown in FIG. 3, since the cross section of the ring-shaped member 30 is substantially circular, a groove is naturally formed at the welded portion between the rim 10 and the ring-shaped member 30, and between the disk 20 and the ring-shaped member 30. Easy to get full penetration welding.

In the second embodiment of the present invention, as shown in FIGS. 4 and 5, the disk 20 is formed by removing four corners of a square plate by a circle (a so-called square disk wheel). The case where the flange portion 24 is coupled to the drop portion 11 of the rim 10 via the ring-shaped member 30 and the cross-section of the ring-shaped member 30 is rectangular is shown. In the second embodiment of the present invention, the inner edge 40 in the wheel axial direction of the disc flange portion 24 includes four general portions 40a and four ventilation portions 40b. Each general part 4
0a is located in a single plane orthogonal to the disk axis and extends in the disk circumferential direction. Each ventilation section 4
0b is located between adjacent general parts 40a,
It is concavely curved outward in the wheel axial direction from a plane orthogonal to the disk axis including 0a. When the cross section of the annular member 30 is rectangular, the annular member 30 and the disc flange portion 24
Is preferably by friction welding.

[0019]

According to the vehicle wheel of the first or second aspect, even if the tip position of the disc flange portion varies in the axial direction during the molding of the disc, the tip position of the disc flange can be determined by using the annular member. Since the discs can be aligned, the disc can be coupled to the inner peripheral surface of the rim in a state where the tip positions of the disc flanges are aligned.
Therefore, welding defects such as poor welding hardly occur, and the bonding strength is stabilized. In addition, even when the disk flange is welded to the inner peripheral surface of the bead seat portion of the rim, the influence of welding is less likely to occur on the outer peripheral surface of the bead seat portion of the rim, and the product accuracy is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vehicle wheel according to a first embodiment of the present invention.

FIG. 2 is a front view of the disk side of the vehicle wheel according to the first embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing a connecting portion of a rim, a disk, and a ring-shaped member of the vehicle wheel of FIG. 1;

FIG. 4 is a sectional view of a vehicle wheel according to a second embodiment of the present invention.

FIG. 5 is a front view of a disk side of a vehicle wheel according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a coupling device showing one of means for coupling a disk flange portion and a ring-shaped member of a vehicle wheel according to a first embodiment (may be applied to the second embodiment) of the present invention. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rim 11 Drop part 13a, 13b Sidewall part 14a, 14b Bead seat part 15a, 15b Flange part 20 Disk 24 Disk flange part 30 Ring member 50 Coupling device

Claims (2)

[Claims] 1. A disk comprising a rim having a drop portion, a side wall portion, a bead seat portion, and a flange portion, and a molded product of a flat disk material, the disk extending substantially parallel to the disk axis and being discontinuous in the disk circumferential direction. A disk having a flange portion, wherein the rim and the disk are coupled via a ring-shaped member joined to an end surface of the disk flange portion and an inner peripheral surface of the rim. Car wheel. 2. The vehicle wheel according to claim 1, wherein the joining between the ring-shaped member and the end face of the disk flange is friction joining by reciprocating rotation.