JPH0521761B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wheel rim, and more particularly to an improvement in the structure of a multi-piece rim for a construction vehicle.

[Prior Art] Conventionally, in this type of rim structure, as shown in FIG. 1, a side ring 2 is fitted to a rim base 1, but the diameter DrΦ of the rim base 1 and the diameter DsΦ of the side ring 2 are There is a diameter difference of a few millimeters between them, and they are shaped so that they fit together easily.

However, with the rim base 1 and side ring 2 having the above structure, when a large radial load is applied to the tire, the side ring 2
The rim base flange and side ring will slide by the gap between them, sliding on the rim flange surface and driving the rim base surface.If this sliding movement is repeated, the rim base flange and side ring will Stress concentration and heat generation due to the friction of the tire and the striking of the outside diameter of the rim base promotes rust, causing fatigue failure of the rim base 1, and wear due to frictional heat generation of the tire sidewall part due to friction between the tire and the side ring. There was a problem.

Therefore, the applicant has already proposed a method such as Japanese Patent Application No. 57-3399 (Japanese Unexamined Patent Publication No. 58-122203) shown in FIG.
We proposed a "multi-piece rim structure" in which the contact surface between the side flange 2 and the rim base 1 is an inclined surface.

[Problems to be Solved by the Invention] However, in this invention, it is necessary to change the rolled shape of the rim base member compared to the conventional one, and it is not compatible with the rim base 1 currently in use. Since they had to be replaced, there were problems such as high costs.

The present invention was made to improve the problems of conventional structures, and even with the rim base currently in use, it is possible to prevent rattling between the side ring and the rim base by simply fitting one member. The purpose of the present invention is to provide a multi-piece rim that can be used.

[Means for Solving the Problems] The above object is achieved according to the present invention by the following multi-piece rim. That is, in a multi-piece rim with a removable side ring, an inclined surface that diagonally faces the rim base or the flange of the bead seat band is formed on the inner diameter of the side ring, and a substantially triangular shape having an inclined surface that matches the inclined surface of the side ring is formed. A setting ring formed separately from the rim base or bead seat band and having a cross section of One rim.

[Function] In the multi-piece rim of the present invention, even if the rim base is currently in use, simply by fitting the settling ring (a member different from the locking ring), the rim base itself can be formed with an inclined surface. It becomes possible to achieve similar effects.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 3 to 6.

In FIGS. 3 to 6, members corresponding to those of the conventional structure will be described with the same reference numerals.

FIG. 3 shows the back flange side of the multi-piece rim according to the present invention, where 1 is the rim base, 2 is the side ring, and 3 is the settling ring. A side ring 2 is fitted through a set ring 3 to the corner between the outer diameter DrΦ of the rim base 1 and the axially inner side surface of the rim base flange. Above side ring 2
has a conical surface with an inclination angle α that faces the flange of the rim base 1 obliquely on the inner diameter DsΦ side. One surface of the settling ring 3 facing the side ring 2 has an inclination angle α that is the same as the inclination angle α of the side ring, and the settling ring 3 has a substantially right triangular cross section.

The above-mentioned set ring 3 is used as a continuous ring (a continuous ring in the circumferential direction) as shown in FIG.
It may be fitted to the rim base 1 by forcibly press-fitting into the rim base 1 or by shrink fitting, or as shown in FIG. It may also be fitted spontaneously.

Therefore, in the multi-piece rim structure formed by the rim base 1, set ring 3, and side ring 2 formed as described above, the side ring 2 is pushed to the flange side of the rim base 1 by the side pressure generated by the internal pressure of the tire. The rim base 1 is pressed and automatically set to a position concentric with the axis of the rim base 1 by the inclined surfaces of the side ring 2 and the setting ring 3.

As a result of the rim base 1, set ring 3, and side ring 2 being set in close contact with each other,
Sliding movement and circumferential slippage of the side ring 2 can be prevented.

In addition, the above side ring 2 and settling ring 3
The appropriate inclination angle α is about 20° to 60°, but preferably in the range of 45°±5°.

Further, in the present invention, the side ring 2 side (the back flange side on the left side of FIG. 6) of the rim base 1 of the multi-piece rim shown in FIG. 3 has been described, but the same applies to the bead seat band 4 side shown in FIG. 6. It is applicable to the invention and is included in the scope of the claims of the present invention.

[Effects of the Invention] According to the multi-piece rim according to the present invention, a settling ring having a substantially triangular cross section that is separate from the rim base or bead seat band can be attached to the rim base or bead seat band without changing the cross-sectional shape of the existing rim base. By simply fitting it into the corner between the outer circumferential surface of the seat band and the inner side surface of the flange in the axial direction, a good rim with improved durability and no "wobble" of the side ring can be obtained.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of a conventional multi-piece rim, FIG. 2 is a partial cross-sectional view of another conventional multi-piece rim, and FIG. 3 is a partial cross-sectional view of a multi-piece rim according to an embodiment of the present invention. Figure 4 is a plan view of an example of settling in the present invention;
FIG. 5 is a plan view of another example of the settling ring according to the present invention, and FIG. 6 is a cross-sectional view of a multi-piece rim according to an embodiment of the present invention. 1...Rim base, 2...Side ring, 3...
...Settling, 4...Bead seat band.

Claims (1)

[Scope of Claims] 1. In a multi-piece rim with a removable side ring, an inclined surface that diagonally faces the rim base or the flange of the bead seat band is formed on the inner diameter portion of the side ring, and an inclined surface that matches the inclined surface of the side ring is formed. A settling ring, which has a substantially triangular cross section and is formed separately from the rim base or bead seat band, is fitted into the corner between the outer peripheral surface of the rim base or bead seat band and the axially inner side surface of the flange. A multi-piece rim characterized by: 2. Claim 1, wherein the inner diameter of the settling ring is slightly smaller than the outer diameter of the rim base or bead seat band, and the settling ring is press-fitted or shrink-fitted to the outer diameter of the rim base or bead seat band. Multi-piece rim as described. 3. The multi-piece set according to claim 1, wherein a cut is formed at one location in the set ring, and the set ring is elastically fitted onto the outer diameter of the rim base or bead seat band. rim.