JP2001173723A - Balance weight for wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a balance weight excellent in forming ability, wide usability, and fixing capability. SOLUTION: The balance weight is composed of plural thick parts 2 arranged through gaps 4a and deformable thin parts 3a for connecting adjacent thick parts 2, and is integrally formed of a sintered metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance weight for a wheel mounted on a wheel of an automobile or the like.

[0002]

2. Description of the Related Art This type of balance weight is used for adjusting the wheel balance, and is mostly made of lead. There have also been proposed cuts of wires such as iron, stainless steel, copper, brass, and aluminum. A plurality of different types of balance weights prepared at intervals of gram units are prepared, the target weight is selected, and the balance weight is attached and fixed to the rim portion of the wheel using a clip.

[0003]

The conventional balance weights have the following problems and are not yet satisfactory. (1) The balance weight is composed of a clip and a weight main body, and it is desirable to eliminate clips such as metal fittings that are not easy to handle. (2) The mounting position of the balance weight with a clip is restricted because the balance weight is attached to the end or the edge of the rim portion of the wheel by hooking the clip. It is necessary to make it hard to be restricted by the installation location, such as installation in (3) The shape of the rim portion is flat or curved depending on the type of vehicle or specification, and the size of the curved surface is also various. For this reason, the conventional product has to be manufactured corresponding to the applicable rim shape, which lacks versatility, but it is desirable to improve it so that it can respond to various rim shapes. . (4) In order to manufacture various types of balance weights with different weights, it is necessary to use mold equipment (molding dies, etc.) of one kind and one size, which is not economical. The goal is to produce the same mold equipment (molding mold, etc.) to further reduce costs. In this case, it is desirable to use a metal other than lead so that it can be manufactured by a method with good productivity.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a first wheel balance weight according to the present invention connects a plurality of thick portions arranged with a gap to adjacent thick portions. , Which are characterized by being formed as one piece made of sintered metal. Here, it is preferable that the thin portion is flush with a lower surface or an upper surface of the thick portion. Further, it is preferable that the balance weight has a mounting adhesive provided on an upper surface or a lower surface of the weight, and is attached to the wheel with the adhesive. In addition, the second aspect of the present invention
Is characterized in that a plurality of sintered metal weight pieces are attached to one side of a double-sided adhesive sheet.

In the former embodiment, each thick portion serves as a weight, and a double-sided adhesive tape is applied to the upper or lower surface, or a viscous adhesive is applied, and the thick portion is adhered and fixed to an appropriate place on the wheel. . In this structure, since the plurality of thick portions arranged with a gap are easily bent and deformed via the thin portions, for example, the entire upper surface or the lower surface of each thick portion is formed into a mounting surface having a predetermined curvature. Is formed into a curved surface,
It is possible to accurately and closely adhere to any of the flat portion, the inner peripheral surface, and the spherical portion of the wheel. Also, since it is easy to break the thin portion by several bending operations, the weight of the balance weight is reduced by dividing the plurality of thick portions connected by the thin portion by breaking the thin portion. Can be adjusted. In terms of manufacturing, it has a shape composed of a plurality of thick portions and thin portions connecting the thick portions, and is manufactured by normal compaction and sintering by powder metallurgy, and thus has excellent mass productivity. Specifically, even if they have the same shape, since the weight changes by changing the density, it is possible to reduce the number of molds for manufacturing. On the other hand, in the latter form, the thin portion is omitted, and only the number of weight pieces corresponding to the required weight can be cut off by cutting the double-sided adhesive sheet with scissors or the like, and can be attached to the wheel. In addition to the simplicity, since the double-sided adhesive sheet is easily bent, the weight piece can be securely fixed to the adhered surface regardless of whether it is flat or curved.

[0006] The balance weight of the present invention is made of an iron-based material,
A copper-based material, a copper-tungsten alloy, or the like can be appropriately selected, and the weight of the balance weight can be adjusted depending on the difference in specific gravity or the density of the sintered body.
In terms of shape, in order to reduce air resistance, for example, it is also easy to make the surface opposite to the sticking surface into a streamline type. The surface of the sintered balance weight can be crushed by shot peening, barrel polishing, or the like. According to this,
A glossy appearance is obtained by processing, the corrosion resistance is improved, and the applicability is improved when the anticorrosive paint is coated. Further, the pores on the surface can be impregnated with resin. According to this, when the material is a porous material, corrosion is remarkably improved since the material is not hydrated. Aluminum paint can be applied to the surface. When installed on the front side of an aluminum wheel, the appearance is the same color, there is no foreign object feeling, and the corrosion resistance is good. For similar purposes,
Galvanization can be applied. With an iron material, a black appearance and corrosion resistance can be imparted by steam treatment. When a copper material is heated and oxidized in the air, a black appearance can be similarly provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described by way of embodiments with reference to the drawings. FIG. 1 is a perspective view showing one of the shapes of the balance weight of the present invention. The balance weight 1A is designed on the assumption of a wheel-side attachment surface (a flat surface and a curved surface), a plurality of thick portions 2 are arranged in parallel with a gap formed by a slit 4a, and each is connected by a thin portion 3a. Shape. Each thick portion 2 is formed of a rectangular column that is long horizontally, but the entire one surface may be a streamline shape or a curved shape (for example, a semi-cylindrical body). About 1 mm is sufficient for the slit 4a functionally, and if it is too large, the whole becomes bulky. The thin portion 3a is located substantially in the middle of the thick portion 2, the lower surface thereof is flush with the thick portion 2, and is formed into a small piece and deformable. The thin portion 3a may be any member that connects the adjacent thick portions 2 so as to be displaceable through the thin portion 3a. For example, the thin portions 3a may be configured to connect the thick portions 2 on one side or both sides. However, regardless of the form of the thin portion 3a, it is preferable that the thin portion 3a is formed at a position flush with the lower surface or the upper surface of the thick portion 2 as in this form, from the viewpoint of manufacturability when compacting.

The balance weight 1A is manufactured by a die forming an outer shell, a first lower punch corresponding to the upper surface of the thick part 2, a second lower punch forming a slit 4a, and a thin part 3a.
A powder molding die composed of a third lower punch corresponding to the upper surface of the balance weight and an upper punch corresponding to the lower surface of the balance weight 1A is used. And, for example, in the case of pure iron,
After the pure iron powder is compacted to a predetermined density, it is sintered in a reducing gas such as an ammonia decomposition gas. The balance weight 1A may be a sintered body. However, in the case of an iron-based material, one that has been subjected to a steam treatment or impregnated with a resin and thermally cured does not impregnate the pores of the sintered body during use. It will be preferable.

FIG. 2 is a perspective view of a balance weight 1B having a shape in which thick portions 2a are provided vertically and horizontally. This balance weight 1B is substantially the same as the shape shown in FIG. 1, but two unit thick portions 2a are provided along the plate width (both sides) of the thin portion 3a in the thick portion 2 of FIG. The difference is that the size is reduced by the slits 4b and the number is three times as large as that of the thick portion 2 in FIG. In other words, in this embodiment, the thin portions 3a corresponding to the slits 4a and the thin portions 3b corresponding to the slits 4b are used as the portions easily deformed by bending.
By doing so, the structure can be easily and reliably adhered to the spherical adherend surface.

An adhesive is provided on the upper or lower surface of the balance weights 1A and 1B manufactured as described above. The adhesive may be a coating type, but if a double-sided adhesive tape 5 is used as shown in FIG. 3, the preservability and the handling property before use are excellent. The adhesive and double-sided adhesive tape 5 used are balance weights 1A and 1B.
At the same time, a material suitable for the material of the wheel 8 is selected.

FIG. 3 is a schematic cross-sectional view in which balance weights 1A and 1B provided with the double-sided adhesive tape 5 are attached to the surface of the wheel 8 having a curved surface. The balance weight 1A shown in FIG. 1 is fixed to the left side of FIG. 3, and the balance weight 1B shown in FIG. 2 is fixed to the right side of FIG. That is, in this embodiment, the balance weight 1B is made of a thin double-sided adhesive tape 5 such that the double-sided adhesive tape 5 is attached to the surface opposite to the thin-walled portion 3a and is easily adhered to the convex adhered surface. Parts 3a, 3b
Side, so that it can be easily adhered to the concave adhered surface. And in the installation work of the balance weight 1A,
For example, from the state where the protective sheet (not shown) of the double-sided adhesive tape 5 is peeled off and the adhesive sheet 5a is exposed, the balance weight 1A is pressed against the convex adhered surface of the wheel 8 via the adhesive sheet 5a, and the whole is formed as a thin portion 3a. And plastically deformed to fit the curved surface of the surface to be adhered and tightly fixed. The work procedure is
Since the adherend surface is a curved surface, the thin portion 3a is plastically deformed by directly pressing the thick portion 2 against the adherend surface of the wheel 8 so that the thin portion 3a is brought into close contact with the whole, or the thin portion 3a May be plastically deformed in advance and pasted from a state where the whole is in a curved state. Of course, when the surface to be adhered is flat, the balance weight 1A is attached via the double-sided adhesive tape 5 as it is. The same applies to the mounting of the balance weight 1B. The protective sheet (not shown) of the double-sided adhesive tape 5 is peeled off and the adhesive sheet 5a is removed.
When the balance weight 1B is pressed against the concave adhered surface of the wheel 8 via the adhesive sheet 5a from the state where
As a whole, the absorbing action of the slits 4a, 4b and the thin portions 3a,
Due to the deformation action of 3b, it is plastically deformed so as to conform to the curved surface of the adhered surface, and is tightly fixed.

In the above embodiment, for example, when the plurality of thick portions 2 are set to the same weight, such as the balance weight 1A, the plurality of thick portions 2 are cut out so as to have a required weight. It can be easily adjusted in various weights, so that it is excellent in versatility. In addition,
The resection can be broken by bending the thin portion 3a and the thin portion 3b at appropriate positions several times. In the case of the balance weight 1A, each thick portion 2 is interposed via a thin portion 3a,
In the case of the balance weight 1B, each thick part 2a is a thin part 3
Since they are integrated via a and 3b, the operation of attaching the double-sided adhesive tape 5 becomes easy, and a sense of unity in the mounted state is obtained.

Next, FIG. 4 is a perspective view for explaining the balance weight 1C without the thin portion 3b. This balance weight 1C is formed into a large number of thick parts 2b which are formed by sintering after forming into a square shape at the same density, and the thick parts 2b as weight pieces are attached to one surface of the double-sided adhesive tape 5. The arrangement is fixed. Each thick part 2b is 0.5
A slit 4c of about 1 mm, that is, a gap is maintained, and is regularly adhered and fixed to one surface of the double-sided adhesive tape 5. Therefore, also in the structure of the balance weight 1C, the protective sheet 5b of the double-sided adhesive tape 5 is peeled off as described above, and the adhesive sheet 5a is exposed and pressed against the surface to which the wheel 8 is to be fixed. Since the double-sided adhesive tape 5 is flexible, it is bent or stretched to form a slit 4c.
And it can always be fixedly adhered to both flat and curved surfaces. Further, the double-sided adhesive tape 5 is bent to open the slit 4c, and the thick portion 2b corresponding to the required weight can be cut off. In addition, when a large number of balance weights 1C are to be adhered and fixed locally, the next balance weight 1C can be further stacked and fixed on the first stage fixed to the wheel 8, in which case the first stage is curved. Adhesive fixation is possible even in the shape.

[0014]

As described above, according to the present invention,
In terms of production, it is excellent in mass productivity, a feature of powder metallurgy,
It is possible to manufacture weight bodies of various weights by using pores (density ratio) peculiar to sintered metal, and it is possible to provide various weights with a small number of powder molding dies.
On the surface to be used, a small number of types of balance weights can always be fixedly adhered to the flat, convex, and concave wheel-side adhered surfaces, and handling is convenient. In addition, by using a metal other than lead, there is an advantage that the environment is safe.

[Brief description of the drawings]

FIG. 1 is a perspective view of a balance weight for explaining an embodiment of the present invention.

FIG. 2 is a perspective view of a balance weight for explaining another embodiment of the present invention.

FIG. 3 is an operation explanatory view for fixing each of the balance weights to a wheel.

FIG. 4 is a perspective view of a balance weight for explaining a fourth embodiment;

[Explanation of symbols]

 1A, 1B, 1C are balance weights 2, 2a, 2b are thick portions (weight pieces) 3a, 3b are thin portions 4a, 4b, 4c are slits (gap) 5 is double-sided adhesive tape (adhesive) 6 is wheel

Claims (4)

[Claims] The present invention comprises a plurality of thick portions arranged with a gap and a deformable thin portion connecting adjacent thick portions, and these are formed as an integral one made of a sintered metal. Balance weight for wheels, characterized in that: 2. The balance weight for a wheel according to claim 1, wherein the thin portion is flush with a lower surface or an upper surface of each of the thick portions. 3. The wheel balance weight according to claim 1, further comprising a mounting adhesive provided on an upper surface or a lower surface of the balance weight. 4. A balance weight for a wheel, comprising a plurality of sintered metal weight pieces, wherein the weight pieces are attached to one surface of a double-sided adhesive sheet.