JPH02169302A - Flange for vehicle wheel assembly - Google Patents

Abstract

PURPOSE: To prevent the abrasion of the sidewall of a tire by forming a flange for fitting the tire with a continuous annular forged member made of a material different from adjacent components of a wheel assembly so as to reduce an electric corrosion action with the components. CONSTITUTION: A wheel assembly 12 for fitting a tire 14 is constituted of a flange 10 and members 16, 18, 20, and it supports the sidewall 28 of the tire 14 on the inner face 26 of the flange 10. The flange 10 is formed with a continuous annular forged member having no induced stress as present by butt welding and conventional cold machining. The flange 10 is made of a high-tension material unlike the members 16, 18, 20 made of low-carbon steel, for example. An electric corrosion action with the members 16, 18, 20 is reduced, and the corrosion in the flange 10 and the abrasion of the sidewall of the tire 14 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel flange for a wheel rim that is particularly useful for radial tires.

[Background of the invention]

Vehicle assemblies that accommodate tires on large vehicles, such as those used in construction operations, are typically formed from multiple parts.

One such component is an annular flange that supports the sidewall of the tire. These cracks are also made from straight rods with flat or curved cross sections that are butt welded together and then formed in a cold forming operation. The butt joints connecting the parts together to form the flange run radially from the inner diameter to the outer diameter of the ring with respect to the axis of rotation of the wheel assembly.

The abutment construction has some drawbacks, including problems with cracking, a relatively short service life of the rim, and excessive wear, especially when using crassial tires with extremely flexible sidewalls. When a radial tire is used, a relatively large local stress is applied to the flange 9, and a crack that runs in the radial direction near the butt joint occurs due to stress concentration in the crack. As the parts are formed during the cold-open forming operation, residual stress concentration induced in these parts causes circumferential cracks to develop around the rim due to fatigue. These problems become more pronounced when the 7-wheel assembly is made from low-carbon steel, as are other parts of the width assembly, and the wheel assembly suffers from electrolytic corrosion between the sides of the 7-range and the rim on the inner surface. produce an effect. Furthermore, the surface of the flange that comes into contact with the tire sidewall is
The reeds in the "roll corners etc." thus form a rough surface on the side of the tire resulting in excessive milling or even sidewall cutting.

[Summary of the invention]

According to one example of the invention, a flange for a wheel assembly is obtained. The flange is a continuous annular forged member made of a different material than the instant contact portion of the width assembly to reduce galvanic corrosion therebetween.

In addition, according to the present invention, a flange for a wheel assembly is obtained which is made of a continuous annular forged member that does not include stress induced by cold working and no butt welds.

In accordance with the present invention, the continuous annular forged flange has a continuous radius of 90° in one embodiment or 150° in another embodiment, reducing the sidewall length of the tire supported by this flange and further adding to the flange. Provides high structural strength.

〔Example〕

In the accompanying drawings, like reference numerals are used to refer to similar or corresponding parts in the drawings. A flange 10 according to a first embodiment of the present invention is illustrated.

The flange 1u is the wheel assembly 1 to which the tire 14 is attached.
Forms part of 2. Vehicles that use such wheel assemblies 12 and tires 14 include off-road graders or large industrial vehicles such as dungeons.

As shown in FIG. 1, the wheel assembly 12 has a flange 1
0, member 16, member 18, and member 2.0. These members and the seven flange are held together by suitable welds 22, 24 to form the finished width assembly.

As seen in FIG. 1, the inner surface 26 of the seven flange 10 supports the sidewall 28 of the tire 14. In this way, especially when the tire 14 is a radial tire with a high degree of side wall flexibility, a considerable force is exerted on the shift flange by this tire.

The flange 10 shown in FIGS. 1 and 2 is a continuous annular flange formed by a forging process to eliminate the need for butt welding and to eliminate the induced stresses caused by cold cutting as is done in conventional construction. It is a member. To create the crack 10, a punched billet of steel is heated to forging temperature and then rolled into an annular shape of ever-increasing diameter by eccentric rollers until the desired final diameter is reached. This rolled annular ring is then reheated to a forging temperature and pressed to obtain the cross-sectional shape shown in the figure.

Due to the seamless forging of the flange 1υ, a high strength material for the flange can be used that is different from the material of the members 16, 18 and 20, which are most typically made from low carbon steel. The use of such dissimilar metals reduces the severity of electrolytic corrosion between members.

In conventional structures, this electrolytic corrosion leads to corrosion on the inner surface of the flange and causes considerable wear on the sidewall of the tire.

Figure 2 shows the cross-sectional shape of a 7-lanzo 1υ. The inner surface 26 has an inner circular arc 30 and a curved surface 32. The inner cylindrical surface 30 must be 100% machined, and the surface 32 does not require any machining, but must be smooth and free from scratches and cracks.

The outer surface 34 of the flange 10 has a cylindrical outer surface 36, a curved surface 3
8 and an intermediate inclined surface 40. Enshomen 36
The notch formed by the sloped surface 40 facilitates positioning and fixing of the flange 10 to the member 16. Edges 42.44, 4 of each end 513.52 of flange 10
6.48 is rounded to eliminate the sharp boundary that occurs at the stress east-center point.

In one example of a flange constructed in accordance with the present invention, the outermost flange diameter at edge 42 was approximately 61 inches. The inner diameter of the flange defined by inner end surface 50 was approximately 51 inches. The length of the circular outer surface 36 is approximately i in, while the angled surface 40 is inclined at an angle of 10' with respect to the outer surface 36. The radius of the curved outer surface 38 was approximately 2 inches. The radius of the curved inner surface 32 was approximately 2" A in. Surface 3
0. The thickness of the flange 10 between d6 is approximately l in;
This thickness increases to about 1.12 inches at the top of ramp 40.

In general, an advantage of the present invention is that it is well suited for flanges with internal diameters of 251n to 571n.

Although the present invention has been described in detail with respect to its embodiments, it is obvious that the present invention can be modified in various ways without departing from its spirit.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a wheel assembly and tire in which an embodiment of the flange constructed according to the present invention is positively operated, and Figure 2 is a cross-sectional view of the flange of Figure 1.

Claims (12)

[Claims] (1) The wheel assembly flange to which the tire is attached is constructed of a continuous annular forged member made of a material different from that of the adjacent parts of the wheel assembly so as to reduce electrolytic corrosion between the parts. , flanges for wheel assemblies. 2. The flange for a wheel assembly according to claim 1, wherein the continuous block-like forged member does not generate induced stress due to cold working and does not include a butt weld. (3) The flange for a wheel assembly according to claim 1, which is used for mounting a radial tire. (4) The flange for a wheel assembly according to claim 1, further comprising a curved portion that supports a side wall of the tire. (5) The flange for a wheel assembly according to claim 4, wherein the curvature spans 90 degrees. (6) The flange for a wheel assembly according to claim 4, wherein the curvature spans 150 degrees. (7) A flange for a wheel assembly comprising at least one type of other member and to which a tire is attached, the flange for a wheel assembly comprising a continuous annular forged member that does not contain stress induced by butt welding or cold working. 8. The flange for a wheel assembly according to claim 7, wherein the flange is formed of a material other than other members of the wheel assembly to reduce electrolytic corrosion. (9) The flange for a wheel assembly according to claim 8, wherein the flange is made of high strength steel, and the other member is made of low carbon steel. (10) The wheel flange according to claim 7, having a continuous curved flange that supports the side wall of the tire. (11) The flange for a wheel assembly according to claim 10, wherein the curvature extends over 90 degrees. (12) The flange for a wheel assembly according to claim 10, wherein the curvature extends over 150 degrees.