JP2006175919A - Large-sized and medium-sized wheels - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide large-sized and medium-sized wheels for which a drop section is eliminated while maintaining a 15° tilt of the bead sheet section. <P>SOLUTION: (1) These large-sized and medium-sized wheels 10 have the bead sheet 11 of the 15° tilt. A rim base 12 has a flat section 13 which is formed by eliminating a rim drop section. The one side bead sheet is formed on a side ring 14 which is detachable from the rim base. (2) A run flat core 20 is loaded from the side direction into the flat section 13 of the rim base, and can be fitted through a rubber pad 21. (3) A wheel 10A for rear tires of a truck or a bus is a super single tire which replaces a dual tire. (4) A hump 18 is provided on the bead section on the vehicle internal side of the super single wheel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a large / medium rim drop part-less wheel for trucks and buses.

A deep tubeless wheel 1 shown in FIG. 5 having a bead seat portion inclined at 15 degrees and having a drop portion is used in about 90% of conventional large and medium wheels for trucks and buses (Japanese Patent Laid-Open No. 2000-000713). Issue gazette). The tire is mounted on the rim by dropping a bead on one side into the drop portion 2 of the rim.
Generally, the front wheels of trucks and buses are single wheels and the rear wheels are double wheels.
JP 2000-000713 A

However, a conventional deep tubeless wheel having a drop portion with a bead seat portion inclined by 15 degrees has the following problems.
(A) Since the rim drop part (well part) is deep (drop part), the size of the brake drum is limited.
(B) If the tire bursts while the vehicle is running, the tire bead portion may fall into the rim drop portion and the tire may come off the rim.
(C) Since there is a drop part for both the front wheel and the rear wheel, it is difficult to mount the run-flat core. If the run-flat core is not installed, problems such as collapse of the load are likely to occur when the tire is punctured or when the tire pressure is reduced.
(D) When the rear wheel is a double wheel, the mounting on the vehicle is a double tightening of the inner nut and the outer nut, which requires man-hours.

The object of the present invention is to eliminate the drop part while maintaining the 15 degree inclination of the bead seat part (therefore, it is not necessary to change the tire structure), and to solve the problems (i), (b) and (c) above. The purpose is to provide large and medium-sized wheels that have been eliminated.
Another object of the present invention is to provide a large / medium-sized wheel that can solve the above-mentioned problem (d) that occurs when the rear wheel is a double wheel.

The present invention for achieving the above object is as follows.
(1) A large / medium-sized wheel having a bead seat inclined at 15 degrees,
The rim base has a flat part formed by eliminating the rim drop part,
One side bead seat is formed on a side ring that is detachable from the rim base, the side ring is locked to the rim base by a lock ring, and the side ring and the rim base are sealed by an O-ring,
Wheel for large and medium size.
(2) The flat part of the rim base is loaded with a metal or polymer compound run-flat core from the side and can be mounted via a rubber pad. Between the rubber pad and the tire bead, the wheel axle The wheel for large / medium sized products described in (1) with a gap in the direction.
(3) The wheel for the rear wheel of the truck / bus is a super single wheel that replaces the double wheel.
(4) The large / medium-sized wheel according to (3), wherein a hump is provided in a bead portion inside the vehicle of the super single wheel.

According to the large / medium-sized wheel of (1), the tire structure does not need to be changed from the conventional structure because the bead sheet is inclined at 15 degrees. Also, since the rim drop part has been abolished, the size of the rim drop part brake drum can be increased, or if the brake drum size is the same as before, the rim diameter can be reduced by one size. The problem (i) can be solved.
In addition, since the drop portion is restrim, even if the tire bursts while the vehicle is running, the tire bead portion does not fall into the rim drop portion and the tire does not come off the rim, and the above problem (b) can be solved.
In addition, since the drop part is rimless and the bead seat on one side has a detachable side ring structure, the run flat core can be inserted and attached to the flat part of the rim with the side ring removed. The problem (c) can be solved.
According to the large / medium-sized wheel of (2) above, the run-flat core is loaded from the lateral direction and can be mounted via the rubber pad, and there is a gap in the wheel axial direction between the rubber pad and the tire bead. Therefore, the length of the rubber pad in the wheel axial direction can be shortened. As a result, the run-flat core can be secured to the flat part of the rim without running both ends of the rubber pad in the wheel axial direction on the bead seat inclined 15 degrees, and the run-flat core and the rubber pad The rim can be prevented from being relatively rotated and damaged by frictional heat, and long-distance run-flat traveling is possible. In addition, the shortened length of the rubber pad in the wheel axial direction can contribute to weight reduction.
According to the large / medium-sized wheel of (3) above, since the wheel for the rear wheel of the truck / bus is a super single wheel, the weight of the tire and wheel can be greatly reduced compared to the double wheel.
According to the large / medium-sized wheel of (4) above, since the hump is provided on the bead portion inside the vehicle of the super single wheel, it is possible to prevent the lateral displacement of the tire bead when the vehicle turns during puncture.

The large / medium-sized wheel (truck / bus wheel) of the present invention will be described with reference to FIGS.
1 and 2 show a super single wheel 10A for the rear wheel of the truck and bus according to the present invention, and FIGS. 3 and 4 show a single wheel (ordinary single wheel) 10B for the front wheel of the truck and bus according to the present invention. Indicates. However, the single wheel 10B of FIG. 3 and FIG.

  The large / medium-sized wheel 10 according to the present invention may be a two-piece welding wheel in which a rim and a disc are separately manufactured of steel or light alloy (for example, aluminum alloy), or a light alloy. It may be a one-piece cast or cast-forged wheel made of aluminum alloy (for example, aluminum alloy). The large / medium-sized wheel 10 is a large / medium-sized wheel having a bead seat 11 inclined at 15 degrees. The large / medium-sized wheel 10 of the present invention has a flat portion 13 (a portion extending linearly in the wheel axis direction) formed by eliminating the rim drop portion of the rim base 12.

  The one-side bead seat 11 is formed on a side ring 14 that is detachable from the rim base 12, and the other bead sheet 11 is formed on the end of the rim base 12 opposite to the side ring 14. The side ring 14 is locked to the rim base 12 by a lock ring 15, and the side ring 14 and the rim base 12 are sealed by an O-ring 16. The side ring 14 is composed of a ring that is continuous over the entire circumference (for example, the same material as the wheel), and the lock ring 15 is composed of a ring having one cut in the circumferential direction. The portion 17 that engages in the wheel axial direction is a convex portion that is continuous over the entire circumference. The outer diameter of the side ring mounting portion of the rim base 12 is smaller than the inner diameter of the side ring 14, and the side ring 14 can be mounted to the side ring mounting portion of the rim base 12 from the lateral direction (wheel axis direction). After inserting the side ring 14 into the side ring mounting portion of the rim base 12, the lock ring 15 is widened to fit over the lock ring engaging portion 17 and fit into the lock ring groove 18, and the expansion of the lock ring 15 is released. Then, it is engaged with the lock ring engaging portion 17 and mounted in the lock ring groove 18 so that it cannot be detached laterally. The rim gutter portion includes a lock ring engaging portion 17 and a lock ring groove 18.

  A rubber pad 21 is attached to the flat portion 13 of the rim base 12 with the side ring 14 removed, and an O-ring 16 is fitted into an O-ring groove, and then a metal (for example, an aluminum alloy or iron casting or forging) Product) or a polymer compound (for example, resin or hard rubber) run-flat core 20 (inserted into the tire inner space that allows the tire to run even if the tire is flat and flat) It is loaded from the direction (wheel axis direction) and can be mounted via the rubber pad 21. There is a gap in the wheel axis direction between the rubber pad 21 and the bead 31 of the tire 30. It is desirable that both end portions of the rubber pad 21 in the axial direction do not cover the bead sheet 11 inclined at 15 degrees and are within the wheel axial direction range of the flat portion 13. The run-flat core 20 has a structure in which ribs are attached to the inside of a box shape or a structure in which ribs are attached to the inside of an I type for weight reduction.

The run-flat core 20 is inserted into an annular space formed by the rim and the tire 30, and a core block divided into a plurality of parts (for example, three parts) in the circumferential direction is connected so as to be bendable by a connecting part 22. Become. The connection at the connecting portion 22 is performed after the core block is placed in the annular space formed by the rim and the tire. Preferably, the core block is connected by the connecting portion 22 and is put in a ring space formed by the rim and the tire 30 as a single run-flat core having both ends open, and the connection at the connecting portion 22 is an annular space. It is done after being put inside.
In order to reduce friction between the tire inner side and the run flat core during run flat running, it is desirable to apply a lubricant in advance to the tire inner side or the run flat core upper surface.

  The wheel for the rear wheel of the truck / bus is preferably a super single wheel 10A that replaces the double wheel. In the case of the super single wheel 10A, the tire is a super single tire 30A, and in the case of the single wheel 10B, the tire is a single wheel tire. However, as the wheel for the rear wheel of the truck / bus, a single wheel may be used as a double wheel.

The distance in the wheel axis direction between the rubber pad 21 and the bead 31 of the tire 30 in the case of the super single wheel 10A is the same as that in the wheel axis direction between the rubber pad 21 and the bead 31 of the tire 30B in the case of the single wheel 10B. Wider than the distance.
In the case of the super single wheel 10A, a hump 18 is provided at a bead portion inside the vehicle of the super single wheel 10A for preventing tire bead displacement.

Next, functions and effects of the large / medium-sized wheel 10 of the present invention will be described.
Since the large / medium-sized wheel 10 of the present invention has the bead seat 11 inclined 15 degrees, it is not necessary to change the tire structure from the conventional tire structure for a 15-degree deep rim. Also, because the conventional rim drop part has been eliminated, the brake drum size (outer diameter) can be increased by the depth of the rim drop part, or the brake drum size (outer diameter) can be increased as before. In this case, the rim diameter can be reduced by one size. This substantially reduces the weight of the wheel.
In addition, since the drop portion is restrim, even if the tire 30 bursts while the vehicle is running, there is no possibility that the tire bead 31 falls into the rim drop portion and the tire 30 comes off the rim.

  Further, since the drop part is rimless and the bead sheet 11 on one side is formed on the detachable side ring 14, the run-flat core 20 is inserted into the flat part 13 of the rim with the side ring 14 removed. Can be installed. When the run-flat core 20 is installed, the vehicle does not tilt significantly left and right even when the tire puncture of one of the left and right wheels or when the tire air pressure decreases, and there is a risk of load collapse that occurs when the vehicle tilts left and right. Less is.

  A run-flat core 20 is loaded on the wheel rim from the lateral direction (wheel axial direction) and can be attached to the flat portion 13 of the rim base via a rubber pad 21. Since there is a gap in the axial direction, the length of the rubber pad 21 in the wheel axial direction can be shortened. As a result, the run-flat core 20 can be secured to the rim flat portion 13 without slipping on the bead seat 11 inclined at 15 degrees on both ends of the rubber pad 21 in the wheel axial direction (to prevent slipping). In addition, the run-flat core 20, the rubber pad 21, and the rim can be prevented from rotating relative to each other and damaged by frictional heat during run-flat running, and long-distance run-flat running is possible. Further, the length of the rubber pad 21 in the wheel axial direction is shortened, which can contribute to weight reduction.

Since the wheel 10 for the rear wheel of the truck / bus is a super single wheel 10A, the tire 30 and the wheel 10 can be significantly reduced in weight compared to the case where a single wheel is used as a double wheel.
Further, since the hump 18 is provided at the bead portion inside the vehicle of the super single wheel 10A, it is possible to prevent the lateral displacement of the tire bead 31 with respect to the rim during turning of the vehicle during puncture, and the turning of the vehicle during puncture is stabilized. If this is achieved by pressing the tire bead from the inner side in the axial direction with the rubber pad, the rubber pad becomes longer and the weight increases, or the rubber pad rests on the bead sheet inclined by 15 degrees (the rubber pad 15 floats radially outward). The core is not sufficiently secured, but the hump 18 prevents the tire beads 31 from slipping with respect to the rim, thereby avoiding these problems.

FIG. 3 is a half sectional view of a large / medium-sized wheel for truck / bus rear wheels according to the present invention. FIG. 2 is a front view of the large / medium-sized wheel of FIG. 1. FIG. 2 is a half sectional view of a large / medium wheel for a truck / bus front wheel according to the present invention. FIG. 4 is a front view of the large / medium-sized wheel of FIG. 3. It is a partial cross-sectional view of a conventional large / medium wheel.

Explanation of symbols

10 Large / Medium Wheel 10A Super Single Wheel 10B Normal Single Wheel 11 Bead Seat 12 Rim Base 13 Flat Part 14 Side Ring 15 Lock Ring 16 O Ring 17 Lock Ring Engaging Part 18 Hump 20 Run Flat Core 21 Rubber Pad 22 Connecting part 30 Tire 30A Super single tire 30B Normal single tire 31 Tire bead

Claims (4)

A wheel for large and medium-sized vehicles having a bead seat inclined at 15 degrees,
The rim base has a flat part formed by eliminating the rim drop part,
One side bead seat is formed on a side ring that is detachable from the rim base, the side ring is locked to the rim base by a lock ring, and the side ring and the rim base are sealed by an O-ring,
Wheel for large and medium size.   The flat part of the rim base is loaded with a metal or polymer compound run-flat core from the side and can be attached via a rubber pad. The rubber pad and the tire bead are spaced in the wheel axis direction. The large / medium-sized wheel according to claim 1.   The wheel for a large / medium-sized vehicle according to claim 1, wherein the wheel for the rear wheel of the truck / bus is a super single wheel instead of the compound wheel.   The large / medium-sized wheel according to claim 3, wherein a hump is provided at a bead portion inside the vehicle of the super single wheel.

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