JP2002061714A - Wheel balance weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel balance weight fixable to a rim part without damaging a wheel when locking the wheel balance weight integrated with a clip member and a weight body on the rim part. SOLUTION: In this wheel balance weight 1 composed of the bar-shaped metallic weight body 2 and the metallic plate clip member 3 having one end part fixed to the weight body 2 and the other end part locked so as to sandwich a peripheral edge part of the rim part of the wheel, the wheel balance weight is characterized in that the weight body 2 forms at least one projection 4 on the respective sides on a surface coming into surface contact with the wheel, and the weight body 2 contacts with the wheel on a top surface of the projection 4. Damage to the wheel is remarkably reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel balance weight mounted on a rim of a vehicle for mounting a tire on a rim so as to provide a weight balance.

[0002]

2. Description of the Related Art In a wheel assembly in which a tire of an automobile or the like is incorporated in a rim, if the weight imbalance in the circumferential direction around the rotation axis of the wheel assembly and the mass imbalance in the rotation axis direction increase, the vibration of the steering wheel and Such a problem that a vertical vibration of a body or a seat called a shake occurs occurs. The vibrations and noise generated during traveling are caused by the imbalance of the wheel assembly.To cancel the imbalance, measure the imbalance of the wheel assembly with a dedicated measuring machine, and balance the wheel assembly to cancel it. A fix has been made by attaching weights to the wheels.

A conventional wheel balance weight is one in which a weight body made of lead or a lead alloy and adjusted to a predetermined weight in advance and a clip member for fixing the weight body to a wheel are integrally cast. The lead or lead alloy used for the weight body has been selected because it has a large specific gravity and is easily adaptable to the curved surface of the tire wheel.

However, since a lead-based material has a problem such as a load on a natural environment, a wheel balance weight using a weight body as an iron-based material has been developed. Specifically, a wheel balance comprising an iron weight body and a clip member made of a steel plate having one end fixed to the weight body and the other end bent to sandwich the peripheral edge of the rim of the wheel. Weight.

[0005] As such a wheel balance weight, for example, registered utility model publication No. 3046046
No., registered utility model publication 3057630. This balance weight is formed by fixing a clip member formed by bending a spring steel plate with a rivet to a weight body formed of cast iron or the like.

A balance weight described in Japanese Utility Model Laid-Open Publication No. 62-70001 is a weight body having a clip member having a through hole at one end joined to the weight body and a concave groove having a projection formed on the bottom surface. The head of the projection is fixed by caulking with the projection of the weight body penetrating the through hole of the clip member.

[0007] Further, registered utility model publication 3051017
In the wheel balance weight described in the item (1), one end of a band-shaped clip member made of spring steel is U-shaped and locked on the rim portion of the tire wheel, and the other single side is engaged with the wheel surface side of the weight body by caulking. A projection is formed. The wheel balance weight is mounted by pressing the wheel surface with the head surface of the engagement protrusion. Therefore,
In this wheel balance weight, there is a problem that the weight main body is likely to be unstable when driving the wheel balance because the weight main body is mounted with a gap from the wheel surface.

[0008]

However, when the above-mentioned iron-based material is used for the weight main body, the hardness of the weight main body is high and the rigidity of the clip member is high unlike the soft material such as lead, so that the wheel balance weight is required. With a hammer when attaching to the rim of the wheel,
There has been a problem that the corner of the end face of the weight body that comes into contact with the wheel damages the wheel.

The present invention has been made in view of the above circumstances, and when a wheel balance weight in which a clip member and a weight body are integrated is locked to a rim, the wheel is fixed to the rim without damaging the wheel. It is an object to provide a wheel balance weight that can be used.

[0010]

Means for Solving the Problems In order to solve the above problems, the present inventors have studied the shape of the weight main body and found that when the wheel balance weight is mounted on the rim portion, the wheel may be damaged. It has been found that a wheel balance weight that can be mounted without any problem is obtained, and the present invention has been completed.

A wheel balance weight according to the present invention is made of a rod-shaped metal weight body, and a metal plate having one end fixed to the weight body and the other end locked so as to sandwich a peripheral edge of a rim portion of the wheel. A wheel balance weight comprising a clip member, wherein the weight body is
At least one protrusion is formed on each side of the surface in contact with the wheel, and the weight body is in contact with the wheel on a top surface of the protrusion.

The protrusion is a spherical protrusion, a substantially elliptical spherical protrusion,
It is preferably selected from rectangular projections,
It is preferable that the contact portion with the wheel at the time of driving be linear or planar.

It is preferable that the projection is formed on a lower end side of a surface in contact with the wheel.

[0014] It is preferable that the weight main body is formed such that a ridge surface on a lower end side of a surface in contact with the wheel and at least both end corners are arc-shaped in cross section.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A wheel balance weight according to the present invention comprises a weight body and a clip member. The weight body has a metal rod shape, and the clip member has a metal plate shape, one end of which is fixed, and the other end of which is locked so as to sandwich the peripheral edge of the rim of the wheel.

The weight body is formed of a bar-shaped iron material. When the weight body is mounted on the rim of the wheel, the corner is apt to damage the wheel. Individual projections are formed. The projections are provided, for example, on the lower ends on both sides of the clip member locking portion of the weight main body, and the weight main body is mounted in contact with the wheel on the top surface of the projection. For this reason, the weight body can be attached to and held on the wheel without contacting the lower end and the corner. Therefore,
The wheel balance weight of the present invention can be mounted on a wheel without damaging the wheel.

The shape of the projection is selected from a spherical projection, a substantially elliptical spherical projection, and a rectangular projection, and is preferably such that the contact portion with the wheel at the time of driving is linear or planar.

The height of the projection from the weight body surface is 0.2
It is preferably in the range of mm to 5 mm. If the height of the projection is less than 0.2 mm, the gap between the weight main body surface and the wheel surface is small, so that there is no effect as a projection. . On the other hand, if the height exceeds 5 mm, the holding stability of the weight body is undesirably reduced.

The size of the projection is 1 to 9 mm in width and 1 to 9 in length.
Any of a spherical projection, a substantially elliptical spherical projection, and a rectangular projection may be used within a range of 60 mm. Further, the top surface of the protrusion may be spherical or planar, and a plurality of protrusions may be formed as long as the protrusion has the above-described shape.

It is preferable that the projection is formed on the lower end side of the surface in contact with the wheel, so that when the wheel balance weight is mounted, damage due to contact with the lower end corner of the weight body is avoided. .

Further, it is preferable that the weight main body is formed in such a manner that a ridge surface on a lower end side of a surface in contact with the wheel and at least corner portions at both ends are formed into an arc-shaped cross section, so that damage to the wheel can be suppressed.

The radius of the corner of the lower end surface is 0.5.
It is preferable that the cross section be an arc not less than mm. If the radius of curvature is less than 0.5 mm, the occurrence of scratches on the wheel by the weight body cannot be reduced, which is not preferable. A more preferable radius of curvature is 1.0 to 4.0 mm.

Further, the end face of the weight main body has an arc-shaped cross section,
Furthermore, by making it spherical, it is possible to reduce the aggressiveness of the corner portion of the end surface of the iron weight main body to the wheel, and it is possible to suppress the occurrence of scratches on the wheel.

The clip member is integrated as a wheel balance weight by locking the weight main body at a predetermined position through a known joining means such as a rivet and a positioning groove provided in the weight main body.

The weight body of the present invention can be formed of steel or the like. This weight body can be manufactured by cutting a wire having a constant cross section to a predetermined length and then performing cold forging.
The weight body is preferably an iron weight.

The clip member is formed by bending a metal plate by press molding or the like. The clip member has one end fixed to the weight main body and the other end curved into an arc shape in cross section so as to sandwich the peripheral edge of the rim. The metal plate of the clip member is preferably a steel plate. Further, it is preferable that the clip member is made of a steel plate and quenched to impart spring properties.

The wheel balance weight of the present invention can be manufactured by joining one end of a clip member formed by bending a metal plate by press molding or the like to a weight body.

[0028]

The present invention will be described below with reference to examples. In addition, the clip member in this embodiment is a steel plate (SK7,
SK6, SK5, S60CM, S65CM and their equivalents) are punched into a predetermined shape, press-formed, bent, and heat-treated. Weight body is steel bar (SS400, S10C and their equivalents)
Is cut to a predetermined length and then subjected to a cold forging process. The wheel balance weights of the examples are subjected to a surface treatment such as a zinc chromate treatment, a dacroidized (registered trademark) treatment, and a silver powder coating.
Further, the wheel balance weight of the embodiment has a small hole that opens in the curved portion of the clip member to facilitate attachment and detachment.

(Embodiment 1) This embodiment is a front view of FIG.
FIG. 3 is a wheel balance weight 1 shown in the schematic side view of FIG. 2. The wheel balance weight 1 is formed in a metal plate shape having one end joined to the weight main body 2 by rivets and one end joined to the weight main body 2 by a rivet. Consists of a substantially C-shaped clip member 3. The clip member 3 is caulked with a positioning groove (not shown) of the weight main body 2 and a rivet for fixing, and a surface in contact with the wheel is formed in a planar shape.

The weight body 2 is, as shown in FIG.
1mm high, 6mm long, 4mm short on both sides of the clip member 3 locking part on the surface in contact with the wheel and on the lower end side, respectively
Are formed. Further, the corner 6 and the lower edge 7 of the surface of the weight body 2 which is in contact with the wheel are rounded, and the corners 5 at both ends on the side where the weight is mounted are processed into an arc-shaped cross section with a curvature R = 2.5. Have been.
For this reason, it is possible to drastically reduce the damage generated on the wheel surface due to the corner portion of the end surface 5 of the iron weight body 2 due to the impact force when the wheel balance weight is mounted.

The wheel balance weight of the first embodiment is
The amount of scratches generated at the time of attachment to the wheel was significantly reduced, and was significantly reduced as compared with the conventional weight body having no projection. (Embodiment 2) This embodiment is a wheel balance weight shown in a side view of FIG. The top of the elliptical spherical projection 5 (height: 1 mm, major axis: 9 mm, minor axis: 4.2 mm) in Example 1 is made flat (3 mm × 0.2 mm), and is formed into a substantially arc-shaped projection from the lower end surface of the weight body. It is formed. By using such protrusions 5, the occurrence of scratches on the wheel could be significantly suppressed as in the case of Example 1.

[0032]

According to the present invention, at least one protrusion is provided on each surface of the weight body that comes into contact with the wheel, so that the wheel balance weight comes into contact with the protrusion when the wheel balance weight is mounted on the wheel. Become
The occurrence of scratches due to the attack of the weight body can be suppressed. Further, since the corners and ridges of the weight body that are in contact with the wheel are rounded, the occurrence of scratches on the wheel when the wheel balance weight is mounted on the wheel can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a wheel balance weight according to a first embodiment.

FIG. 2 is a schematic side view illustrating a protrusion of a wheel balance weight according to the first embodiment.

FIG. 3 is a schematic side view illustrating a protrusion of a wheel balance weight according to a twenty-first embodiment.

[Explanation of symbols]

1. 1. wheel balance weight, Weight body,
3. Clip member, 4,5. Protrusions, 6. 6. arc-shaped cross-section end of the weight body; Circular arc section at the lower edge of the weight body,

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuhiko Suganiuchi 3-65 Midorigaoka, Toyota-shi, Aichi Prefecture Inside Daitoyo Kogyo Co., Ltd. (72) Inventor Asayuki Ishikawa 1st Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Corporation Inside the company (72) Inventor Masakazu Ishikawa 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Hiroshi Yamaguchi 36 Kasuchi, Oji, Shimoyamamura, Higashikamo-gun, Aichi Prefecture Toyo Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A wheel comprising a rod-shaped metal weight main body and a metal plate clip member having one end fixed to the weight main body and the other end locked so as to sandwich a peripheral edge of a rim portion of the wheel. A balance weight, wherein the weight body has at least one protrusion formed on each side of a surface in contact with the wheel, and the weight body contacts the wheel at a top surface of the protrusion. Wheel balance weight. 2. The projection according to claim 1, wherein the projection is a spherical projection, an elliptical spherical projection,
The wheel balance weight according to claim 1, wherein the wheel balance weight is selected from rectangular projections. 3. The wheel balance weight according to claim 1, wherein the protrusion is formed on a lower end side of a surface in contact with the wheel. 4. The wheel balance weight according to claim 1, wherein the weight main body is formed such that a ridge surface on a lower end side of a surface in contact with the wheel and at least corner portions at both ends are arc-shaped in cross section.