JPS63192601A - Wheel for tubeless tire - Google Patents

Abstract

PURPOSE:To enhance the shock damping characteristic and make the construction in light weight by forming a rim from two rim halves, fitting the well parts of the halves and welding, adhering a disc part, forming an air chamber between the rim halves, and putting in communication with the air inside the tire. CONSTITUTION:Adhesives are coated on the contact faces of the hub mounting faces 16A, 16B of rim halves 1A, 1B, which are then fitted in well parts 14A, 14B for consolidation. The end of the well part 14B is welded fast to the well part 14A. A hub hole 19 and a bolt hole 20 are punched in the hub mounting surfaces 16A, 16B. Thereby an air chamber 21 is formed between the rim halves 1A, 1B by bordering a flange 11B, a beed 12B, a side wall 13B, and bulges 15B, 15A to obtain a condition that a small hole 22 provides communication to the air chamber inside the tire. This constitution assures tire functions, provides an enhanced shock damping characteristic, and enables making the construction in light weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wheel with improved cushioning performance, particularly to a wheel used in a tubeless tire.

[Conventional technology]

Conventionally, rims that are determined by JIS standards are generally used for wheels, and a disc is fitted onto the rim, and the rim and disc are welded together to make the wheel usable (hereinafter referred to as a rim). The combination of the wheel and the disk is called a wheel, and the state in which a tire is attached to the wheel is called a wheel. However, in recent years, as the tires used in the rims have improved, rims with wider tire widths and larger outer diameters have come into use, but with smaller bead diameters where the tires fit onto the rims. Wide and small diameter rims with a small rim diameter and a wide rim bead width are now required.

On the other hand, the deep rim (DC type) is made by cutting a strip to a certain length and welding it into a cylindrical shape and then roll forming it into a rim shape. (I see. As the width of the strip becomes wider, the inside of the forming roll becomes larger, and the roll mounting shaft cannot withstand the forming pressure. Therefore, it was not possible to process products with a wide inside rim and a small rim diameter. Furthermore, after the disk to be fitted to the rim is fitted into the inner diameter side of the well of the rim, the disk and rim are welded together and fixed together, but if the above welding is spot welding, the rim and disk are Even if they are tightly fitted, misalignment may occur between fitting and welding.
This can cause runout of the bead, especially lateral runout, which can impede the stable running performance of the wheel.Also, when welding and fixing the rim and disc by arc welding, it is more difficult to Rather, it is possible to eliminate the above-mentioned lateral vibration of the bead portion by pressing the rim and disk with a jig in a loosely fitted state to hold them together so as not to cause misalignment and then welding them together. Fixing with a jig poses problems in mass production.

On the other hand, when used as a wheel, the wheel is used with a tire attached to it, and the tire is also standardized by the JIS standard, and tubeless tires that do not use a tube are also widely used. Whether there is a tube or no tube, the cushioning function of the tire is determined by the air inside the tire.Tires called super balloon flotation tires are Although the bead diameter of the tire that is fitted is small, the bead width of the tire is wide, so
The outer width and outer diameter of the tire are also large, and the air pressure inside the tire is 1
-Okg-f/mn+".The purpose of using this super balloon flotation tire is to enable the wheels to run even in muddy areas such as wet fields, and to float like a balloon. The reason why the outer diameter and width of the tire are increased is to increase the air capacity within the tire.However, the outline of the rim on which the tire is mounted Air can only be filled in the area formed by the inner diameter of the tire and the inner diameter of the tire.

Looking at the above-mentioned wheel shown in Fig. 5, which is often used for automobiles or scooters, when fitting the rim R and the disc D, the disc D-t-L is
They are fitted with a deviation of 1.5 degrees and spot welded with W. The above-mentioned deviation amount is determined by the size of the inside of the vehicle or the brake drum when used as a wheel, and differs depending on the type of vehicle. Both the rim R and the disc D are manufactured from steel plates, and in particular, the rim R has no holes other than valve holes (not shown).

Moreover, when a tubeless tire is used, there are no holes other than the above-mentioned valve holes in order to maintain airtightness.

[Problem that the invention seeks to solve]

As mentioned above, in a tubeless tire, the air filled in the tire is determined by the inner diameter of the tire and the air chamber formed by the contour of the rim. However, when using the tubeless tire described above under the constant pressure specified by the tire, the air volume within the tire cushions the impact on the wheel, but this buffering effect becomes better as the air volume increases. Since a tire with a wide inner diameter and a large tire outer diameter will be used, a rim with a small rim diameter and a wide rim width will inevitably be required. The aim is to provide wheels that meet the needs of customers.

[Means for solving problems]

In order to achieve the above object, the present invention provides a wheel in which a rim and a disc are combined, and the disc surface of the hub mounting surface is shifted to one side from the rim centerline. A rim half body formed by integrally deep drawing a part, a well part, and a disk part connected to the well part, and a bead part and a flange part continuous to the collar part, and a disk part connected to the flange part. Both rim halves are integrally formed by drawing, and both rim halves are fitted and welded at their respective wells, and the disc parts of both rim halves are bonded to integrate both rim halves. By fixing the rim halves together, an air chamber is formed between the two rim halves, and the air chamber communicates with the air within the tire.

[Effect]

The wheel for a tubeless tire according to the present invention is a wheel configured to have double discs, and the bead part and well part continuous with the flange part, and the disc part connected to the well part are integrally deep-drawn. The formed rim half body is fitted with the rim half body formed by integrally drawing a bead part, a flange part, and a disk part connected to the flange part continuous with the well part at the respective well parts.・Fix the two rim halves together by welding and gluing the disk parts of both rim halves to form an air chamber between the rim and the disk, and connect the air chamber to the tire air. Since the air chamber is surrounded by the disc part, the disc part, and the rim, the air capacity increases even if the amount of air inside the tire is constant. The impact received is alleviated and attenuated, making it possible to improve ride comfort even with the same tire size, and by increasing the volume of the air chamber,
In order to improve the strength, the disc part is provided with unevenness, so the plate material used can be made thinner.The formation of the unevenness on the disc part is due to the heat conducted from the brake drum during running and the friction transferred from the tire side. Heat is quickly dissipated by the unevenness through the air in the air chamber.

[Example] Examples of the present invention will be described based on the drawings. FIGS. 1 and 2 show the first embodiment, and FIGS. 3 and 4 show the second embodiment. , the same members will be explained using the same reference numerals.

The wheel 1 of the first embodiment shown in FIGS. 1 and 2 consists of rim halves IA and IB, and one rim body IA has a stepped bead 12A, a side wall 13A, and a well connected to a flange IIA. The portion 14A forms a rim portion,
A disk portion is formed of a concave portion 16A (hereinafter referred to as a hub mounting surface) formed by a raised portion 15A continuous with the long well portion 14A, which is further extended, and the rim portion and the disk portion are integrally drawn. obtained by doing.

In this embodiment, the end of the flange 11 is curled inwardly, but this curling is done because
This is to increase the rigidity of the flange 11A, and curling can also be done outward, but if curling is done outward, mud and water may accumulate and corrode the flange IIA. , it is necessary to take preventive measures.

Since the drawing process for the disk portion described above is deep drawing, the corner R connecting the well portion 14A and the raised portion 15A has a curvature that does not interfere with the mounting of the hub or brake drum (not shown). By increasing the radius, the workability of drawing is improved, and the raised portion 1
The deeper the level difference between the hub mounting surface 5A and the hub mounting surface 16A, the larger the radius of curvature can be taken, making it easier to perform corrugated molding to obtain a lip effect on the raised portion 15A.

The other rim half IB has sidewalls 13B4, bead 12B, and flange arranged inward and upward from the short well portion 14B in a stepped manner to face the sidewall 13A, bead 12A, and flange IIA of the one rim half IA. IIB forms a rim part, a raised part 15B continues below the flange 11B, and a hub mounting surface 16B is further recessed from the raised part 15B to form a disk part,
In this embodiment, the rib 17B is placed in a suitable position (
In the illustrated example, reinforcement is provided at eight locations).

Further, in the illustrated example, the raised portion 15B is recessed in a step-like manner, and this step-like recess is intended to disperse the stress of the wheel, but instead of being recessed in the aforementioned raised shape, , it can also be formed in an outwardly protruding shape.

The rim half body IB consisting of the rim part and the disc part described above is obtained integrally by press drawing,
The recessed hub mounting surface 16B is the one rim half IA mentioned above.
The hub mounting surface 16A means the respective well portions 14A and 14B of one rim half IA and the other rim half IB.
It is configured so that they come into contact when inserted and fitted.

In order to assemble and integrate one rim half body IA and the other rim half body IB, the well part 14A of one rim half body IA is inserted from the tip opening of the well part 14B of the other rim half body IB. The respective flanges IIA and IIB of both rim halves are inserted and pushed until the respective hub mounting surfaces 16A and 16B of both rim halves IA and 1B come into contact with each other.
The rim width and deviation amount to which the tire will be mounted will be determined based on this information.

When assembling both rim halves IA and IB described above, an adhesive that also serves as a sealant is applied to the respective hub mounting surfaces 16A and 16B of both rim halves and the abutting surfaces, and the above-mentioned mounting surfaces are By adhering 16A and 16B to form a sealed shape, the airtightness of the air chamber 21, which will be described later, is improved.

In addition, the side wall 13 of the other rim half body IB described above
At least r small holes 22 are bored in B.

Rim half body IA and rim half body I assembled as described above
B is integrated by welding at the end of the well portion 14B, and is further sealed by adhesively fixing the hub mounting surface 16A.
, 16B, the processing of the wheel 1 is completed by punching the hub holes 19 and the bolt holes 20, but plating or external painting is performed as necessary.

As mentioned above, after the rim halves LA and IB are assembled and welding is completed, the hub hole 19 and the bolt hole 20 are punched in the hub mounting surface, so that each hole has the inner diameter of the well portion 14A of the rim half IA or Hub mounting surface 16 of rim half IB
Since the hole is punched using the diameter of the recess B as a guide, the hub hole 19 will be located at the center of the wheel 1 after the wheel 1 is completed.
Further, the bolt holes 20 are equally spaced around the hub hole 19, and the holes in the hub mounting surfaces 16A and 16B coincide with each other without causing any horizontal or vertical vibration in the beads 12A and 12B. . Moreover, the hub mounting surface 16A, 1
When adhering the contact surfaces of 6B, when applying adhesive to the corresponding contact surfaces, the above-mentioned contact is not only adhered, but also the excess adhesive applied is removed from the recessed hub mounting surfaces 16A and 16B. When the adhesive is applied to the inner periphery, the flange 11B of the rim half body IB is sealed.
Air chamber 21 formed by 1 bead 12B1 side wall 13B, raised part 15B, and raised part 15A of rim half body IA
Therefore, when a tubeless tire is mounted on the rim portion, the air chamber 21 can also be filled with air through the small hole 22 bored inside the tire and in the side wall 13B, and the air chamber 21 can be filled with air. The air capacity within the tire increases by the volume of the air chamber 21.

In addition, the raised portion 15A is formed in conjunction with the inward curling of the flange IIA, and the flange IIB is connected to the raised portion 15B, which improves the rigidity of the rim portion and the disc portion. The rigidity is increased, the iron or light alloy material can be made thinner, and the weight can be reduced.

In the first embodiment, a rib 17B is provided at the corner from the raised portion 15B of the rim half body IB to the hub mounting surface 16B.
, 17B, ... are formed by press molding, which makes the rim a rigid body and improves the strength of the entire wheel.Furthermore, since unevenness can be formed on the disc part, the air in the air chamber described above can be improved. In addition to the intervention of
Said rib 17B.

17B, . . . can improve decorativeness.

The second embodiment shown in FIGS. 3 and 4 is a wheel used for a scooter, for example, and is integrally provided with a drum case for mounting a brake, which also serves as a hub.
Flange 11A1 Bead 12A.

The side wall 13A and the well part 14A form one rim part, and a raised part 15 is continuous to the well part 14A.
A and a burred peripheral edge 18A on the inner diameter side following the raised portion 15A are drawn together with the aforementioned rim portion, and the raised portion 15A has a concave shape with respect to the plane. A rib 17A is provided, and the purpose of this rib 17A is to strengthen the disk portion.
The raised part 15A is corrugated in harmony with the curling towards the 2A side to increase the rigidity of the entire rim, and the raised part 15A is tapered from the raised part 15A to the peripheral edge 18A. This is because it can disperse stress better than a flat disk part, and
This is to increase the volume of an air chamber 21, which will be described later.

The rim half body 2B facing the above-mentioned rim half body 2A has a side wall 13B, a bead 12B, and a flange 11B formed in a stepped manner upward and outward continuously from the short well portion 14B to form a rim portion. Continuing from IIB, a raised part 15B and a recessed part 16B formed by corrugating the 15B are formed to form a disc part, and a burred peripheral edge 18B for attaching an axle mounting pipe 25 is provided at the center of the disc part. Form.

The rim half body 2B constructed as described above is integrally formed by drawing, similar to the above-mentioned rim half body 2A, and further similarly to both rim halves IA and IB in the first embodiment.

Further, the brake drum mounting case 30 is narrowed into a cup shape, and its outer edge 31 is formed to have a brake mounting diameter to which a brake shoe is attached, and its hub mounting surface 16
In the center of A, an inner edge 32 is formed by burring, but it is better to make the inner edge 32 as long as possible so that when the axle mounting tube 25 is welded at the end of the inner edge 32, the tube 25
This makes it easier to obtain a perpendicularity on the hub mounting surface 16A. The inside of the axle mounting tube 25 is conventionally processed to fit a housing for mounting a hair ring and an axle, as is known.

Next, the assembly of the rim halves 2A and 2B will be described.
Using the flat part formed on the raised part 15A of the rim half body 2A as a reference, the outer edge 31 of the brake drum mounting case 30 is inserted into the rim half body part 2B, and the flat part and the brake drum mounting case 30 are inserted. The peripheral edge 18 of the rim half body 2A and the outer edge 31 of the case 30 are held flush with the hub mounting surface 16A.
Arc weld the cylindrical outer ends of the rim half 2A and case 3.
Furthermore, the axle mounting tube 25 is inserted into the inner edge 32 of the plate kit and ram mounting case 30, and the tube 25 is welded at the peripheral edge of the inner edge 32 to form an integral part. The V-shape formed by the peripheral edge 18A of the rim half body 2A, the outer edge 31 of the brake drum mounting case 30, the axle mounting pipe 25, and the inner edge 32 of the case 30 is assembled. Pour the adhesive that will become the seal into the groove,
In particular, it is preferable to pour as much adhesive as possible into the V-shaped groove formed by the tube 25 and the inner edge 32.

The rim half body 2B is attached to the well portion of the rim half body 2B by using the well portion 14A of one rim half body 2A fixed to the brake drum mounting case 30 to which the axle mounting pipe 25 is attached and the aforementioned tube 25 as a guide. By fitting the portion 14B and the peripheral edge 18B and pushing the rim half body 2B until the hub attachment surface 16B of the rim half body 2B comes into contact with the hub attachment surface 16A and the raised portion 15A of the rim half body 2A, the rim half body 2B is Rim half 2
It is assembled integrally with A. By pushing the rim half B during assembly, the adhesive is poured into the V-shaped groove formed by the axle mounting tube 25 and the inner edge 32 of the brake drum mounting case 30. is pressed by the hub mounting surface 16B of the rim half body 2B and some of it protrudes outside the case 30, so that the fitting portion between the axle mounting tube 25 and the peripheral edge 18B of the rim half body 2B is sealed. .

Then, the hub mounting surface 16A or the raised portion 1 of one of the rim halves 2A comes into contact with the hub mounting surface 16B of the rim half 2B.
One rim half body 2A and the rim half body 2B are bonded together by spot welding or the like at a suitable location, and furthermore, the end of the well part 14B of the rim half body 2B is connected to the well part 14A of the one rim half body 2A. Wheel 2 is completed by welding.

Note that the axle mounting tube 25 and the peripheral edge 18B of the rim half body 2B may be further welded.

The side wall 13B of the rim half body 2B has at least one
Small holes 22 are provided in the flange 11B1 of the rim half body 2B.
Tire air is communicated with the air chamber 21 formed by the bead 12B, the raised part 15A of one rim half, the raised part of the other rim half 2B, and the brake drum mounting case 30.

〔Effect of the invention〕

A wheel for a tubeless tire according to the present invention includes a rim half body formed by integrally deep drawing a bead part and a well part continuous with the flange part, and a disc part connected to the well part, and a rim half body formed by integrally deep drawing a bead part and a well part continuous with the flange part, and Then, the bead part, the flange part, and the rim half body formed by integrally drawing the disk part connected to the flange part are fitted and welded at their respective well parts, and the two rim halves are By gluing the disc parts and fixing both rim halves together, an air chamber is formed between the two rim halves, and the air chamber communicates with the air inside the tire. The greatest feature of the present invention is that the air capacity of the tire increases, so even if the tire has a small actual volume, it can fully perform the functions of a conventional tire, and the overall weight of the wheel can be reduced. The adhesive used in assembling the rim halves not only bonds the discs of the rim halves together, but also acts as a sealant.

In addition, when assembling both rim halves to form a wheel, assembly can be performed without the need for any jigs during welding, which improves work efficiency.Furthermore, the disc part is integrated with the flange. Since the rim is formed into a rigid body, the strength of the entire wheel can be improved, and the thickness of the plate used can be reduced, which helps reduce the weight of the tire as well.

In addition, since the disc part is drawn, unevenness is formed, increasing the surface area, and in conjunction with the air in the air chamber described above, the frictional heat from the brake tire can be effectively transmitted and dissipated. The formation of irregularities also improves the decorativeness as well as the covering of the wheel cap.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, and FIG.
The figure is a sectional view of the main part, FIG. 2 is a front view, FIGS. 3 and 4 show a second embodiment of the invention, FIG. 3 is a sectional view of the main part, and FIG. FIG. 5 is a front view, and FIG. 5 is a sectional view of a main part of a conventional wheel. 1.2: Wheel IA, IB, 2A, 2B? Rim halves 11A, IIB: Flanges 12A, 12B
: Door 13A, 13B : Side wall 14A, 14B : Well part 15A, 15B
: Raised portions 18A, 18B 4 peripheral edges 21:
Air chamber 22: Small hole 30 Nibre One drum mounting case Patent applicant: Daido Kogyo Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) In a wheel in which a rim and a disc are combined, and the disc surface of the hub mounting surface is shifted to one side from the rim centerline, the flange is continuous and connected to the bead and well, as well as the well. A rim half formed by integrally deep-drawing a disk portion, and a rim half formed by integrally drawing a bead portion and a flange portion continuous with the well portion, and a disk portion connected to the flange portion. By fitting and welding the body at their respective well parts, and gluing the disk parts of both rim halves to integrally fix both rim halves, an air chamber is formed in both rim halves. A wheel for a tubeless tire, characterized in that the air chamber is configured to communicate with air within the tire. (2) One of the rim halves is integrally fixed to the periphery of a brake drum case provided at the center of the wheel, and the other rim half is integrally fixed to the outer periphery of the wheel for mounting the axle. A wheel for a tubeless tire according to claim 1.