JPH0861433A - Balance weight for wheel - Google Patents

Abstract

PURPOSE: To enable compatibility of slip-off prevention of a balance weight from a wheel rim part with the easiness of removal by providing a stopper locking part between a clip and the wheel rim part in a balance weight for a wheel fitted by driving a substantially U-shaped clip into the wheel rim part. CONSTITUTION: A clip 2 is integrally provided on a balance weight 1 made of lead by casting the end part 2a of the clip. The clip 2 is formed in such a manner that the exposed part is substantially U-shaped, the width is set smaller than the width of the weight 1, and the inside diameter (d) is set a little smaller than the insert diameter D of a wheel rim part 4. The forward end part of the clip 2 is bent inward to form a hook-like locking part 3. A locking groove 5 is formed like a ring in a position of the wheel rim part 4 that is opposite to the hook-like locking part 3. When the weight 1 is installed on the rim part 4, the clip 2 is driven into the rim part 4 and the hook-like locking part 3 and the locking groove 5 are locked with each other.

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 for adjusting an uneven weight distribution of an automobile tire and a wheel.

[0002]

2. Description of the Related Art In order to adjust the unevenness of the weight distribution of automobile tires and wheels, a balance weight made of lead is attached to the wheel rim portion.

Conventionally, in order to attach the balance weight to the wheel rim portion, as shown in FIG. 9, a substantially U-shaped clip fixed to the weight is driven into the wheel rim portion.
The balance weight is attached to the wheel rim portion by the elastic holding force of the clip.

[0004]

However, in the above-described conventional wheel balance weight, when the balance weight is attached to the wheel rim portion, the clip spreads if the balance weight is driven too much, and the elastic holding force of the clip is small. Then, there is a problem that the balance weight easily comes off from the wheel.

To solve this problem, in Japanese Utility Model Laid-Open No. 2-124347, a spacer made of an elastic material is provided on the inner surface of the clip fixed to the balance weight so as to be in contact with the end surface of the wheel rim portion. Balance weights for wheels are listed.

According to this, when the clip is driven into the wheel rim portion, the inner surface of the clip does not directly contact the end surface of the wheel rim portion by the spacer, and the elastic force of the spacer causes an excessive driving force and its reaction force. Since the clip is buffered, the clip can be prevented from falling off the wheel without plastic deformation of the clip.

However, even in the case of the above-mentioned conventional publication, if the clip width is narrow and the plate thickness of the clip is thin,
The elastic gripping force of the clip becomes small, and the balance weight easily falls off while running.

The present invention has been made in view of the above problems. A first object of the present invention is to provide a balance weight for a wheel which is attached by driving a substantially U-shaped clip into a wheel rim portion. The purpose is to prevent the weight from falling off the wheel rim and to facilitate removal.

A second object is to make it possible to control the locking resistance force by setting the shape of the locking portion,
It is to achieve the first purpose.

A third object is to achieve the second object while easily forming the hook-shaped engaging portion.

A fourth object is to achieve the second object while forming the hook-shaped locking portion without increasing the number of parts.

A fifth object is to set a locking portion only for a clip, which is advantageous in terms of cost, and to control the locking resistance force by the strength of the driving force.
It is to achieve the first purpose.

A sixth object is to achieve the fifth object while minimizing the processing man-hour.

[0014]

In order to achieve the first object, in the first invention according to claim 1, as shown in the claim correspondence diagram of FIG. 1, the weight a is fixed to the weight a. In a wheel balance weight that is configured to have a clip b and is attached by driving a substantially U-shaped clip b into the wheel rim portion c, a locking resistance force is exerted between the clip b and the wheel rim portion c. Is provided with a retaining locking portion d that can be controlled.

In order to achieve the above second object, in the second invention according to claim 2, in the wheel balance weight according to claim 1, the retaining locking portion d is a key formed on the clip b. It is characterized in that it is constituted by a locking portion and a locking groove formed in the wheel rim portion c.

In order to achieve the third object, the third aspect of the present invention is the balance weight for a wheel according to the second aspect, wherein the hook-shaped engaging portion is a clip b.
It is characterized in that it is formed by bending the tip part of the inside.

In order to achieve the fourth object, according to the fourth invention of claim 4, in the balance weight for a wheel according to claim 2, the hook-shaped engaging portion is a clip b.
It is characterized in that it is formed by making a substantially U-shaped notch and bending the notched part inward.

In order to achieve the fifth object, in the fifth invention according to claim 5, in the balance weight for a wheel according to claim 1, the retaining locking portion d is opened in the clip b. It is characterized in that it is configured by intentionally forming a burr protrusion on the rim side at the stage of manufacturing the hole by punching.

In order to achieve the sixth object, according to the sixth invention of claim 6, in the wheel balance weight according to claim 5, the hole opened in the clip b is a hook for removing the balance weight. It is characterized by being a hole.

[0020]

The operation of the first invention will be described.

When the balance weight is attached to the wheel for balancing the wheel, it is attached by driving a substantially U-shaped clip b fixed to the weight a into the wheel rim portion c.

By this attachment, since the retaining locking portion d is provided between the clip b and the wheel rim portion c, the holding force of the balance weight with respect to the wheel is sandwiched by the wheel rim portion c. The elastic clamping force by the clip b and the locking resistance force by the retaining locking portion d are added together, and the balance weight is reliably prevented from falling off the wheel rim portion.

In addition, if the balance weight is not easily removed, the work of removing the balance weight becomes difficult when the wheel balance is re-established by tire replacement or the like, but the retaining locking portion d has a locking resistance force. Since it is controllable, it is possible to set the locking resistance force that is compatible with the balance weight falling prevention and the ease of removal.

The operation of the second invention will be described.

When the balance weight is attached to the wheel for balancing the wheel, a substantially U-shaped clip b fixed to the weight a is driven into the wheel rim portion c, and a key-like engaging portion formed on the clip b is engaged. It is attached by engaging with the engaging groove formed in the wheel rim portion c.

Therefore, the smaller the locking overlapping surface or the locking angle of the hook-shaped locking portion and the locking groove, the weaker the locking resistance force is, and the larger the locking overlapping surface or the locking angle is, the locking resistance force. It is possible to control the locking resistance force by setting the shape of the locking portion such that the strength becomes stronger.

The operation of the third invention will be described.

When forming the hook-shaped locking portion on the clip b, the tip portion of the clip b is bent inward.

The operation of the fourth invention will be described.

In forming the hook-shaped engaging portion on the clip b, a substantially U-shaped cut is made in the clip b and the cut portion is bent inward.

The operation of the fifth invention will be described.

When the balance weight is attached to the wheel for balancing the wheel, a substantially U-shaped clip b fixed to the weight a is driven into the wheel rim portion c, and the burr protrusion formed on the clip b is attached to the wheel rim portion. It is attached by biting into c and locking it.

Therefore, as the retaining locking portion d,
It is only necessary to intentionally form a burr projection on the rim side at the stage of punching out a hole to be opened in the clip b, and it is not necessary to form a locking portion on the wheel rim portion c side.

If the driving force of the clip b to the wheel rim portion c is weakened, the bite locking force of the burr projection is weak, and if the driving force is increased, the bite locking force of the burr projection is strengthened. By setting the strength of the driving force applied to the wheel rim portion c, the locking resistance force can be controlled.

The operation of the sixth invention will be described.

The clip b is provided with a catch hole for removing the balance weight in case of rebalancing the wheel for tire replacement or the like. However, since the burr projection is formed in this hole, the balance weight is formed. There is no need to set two holes, one for the hook for removal and another for the burr projection.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) First, the structure will be described.

FIG. 2 is a perspective view showing a wheel balance weight of a first embodiment corresponding to the first invention, the second invention and the third invention, and FIG. 3 is a balance weight and a wheel rim of the first embodiment. FIG. 4 is a sectional view showing a portion, and FIG. 4 is a sectional view showing an attached state of the balance weight of the first embodiment.

2 and 3, 1 is a weight, 2 is
Is a clip, 3 is a hook-shaped locking portion (corresponding to the retaining locking portion d), 4 is a wheel rim portion, and 5 is a locking groove (corresponding to the retaining locking portion d).

The weight 1 is made of lead, and the end portion 2a of the clip 2 is cast into the weight 1.

The portion of the clip 2 exposed from the weight 1 is substantially U-shaped, its width is set smaller than the width of the weight 1, and its inner diameter d is slightly smaller than the insertion diameter D of the wheel rim portion 4. It is set.

The hook-shaped engaging portion 3 is formed by bending the tip of the clip 2 inward.

The locking groove 5 is formed in an annular shape at a position corresponding to the hook-shaped locking portion 3 of the wheel rim portion 4.

Next, the operation will be described.

[Balance Weight Attaching Work] When attaching the balance weight to the wheel in order to balance the wheel, as shown in FIG. 3, a substantially U-shaped clip 2 fixed to the weight 1 is driven into the wheel rim portion 4. The hook-shaped engaging portion 3 formed on the clip 2 and the engaging groove 5 formed on the wheel rim portion 4 are attached by being engaged.

[Balance Weight Attachment Holding Force] The balance weight attachment state by the above work is shown in FIG.
As shown in. The holding force of the balance weight with respect to the wheel in this state is an elastic holding force due to the clip 2 being pushed and expanded in the wheel rim portion 4 due to the diameter difference between the insertion diameter D of the wheel rim portion 4 and the inner diameter d of the clip 2. , The hook-shaped locking portion 3 and the locking resistance force by the locking groove 5 are added together.

Therefore, even if vibration or some external force is applied during traveling, since the holding force is higher than the case where the balance weight is attached only by the elastic clamping force, the balance weight is surely prevented from falling off the wheel rim portion 4. To be done.

[Locking resistance adjusting action] As described above, it is better to make it difficult to remove the balance weight from the standpoint of preventing it from coming off. However, if the balance weight is not easily removed, the work of removing the balance weight becomes difficult when rebalancing the wheel by replacing the tire.

On the other hand, with respect to the hook-shaped engaging portion 3 and the engaging groove 5 which are the retaining engagement portions, the smaller the overlapping area between them and the smaller the engaging angle are, the weaker the engaging resistance force is. The locking resistance is controlled by setting the shape of at least one of the hook-shaped locking portion 3 and the locking groove 5 such that the locking resistance becomes stronger as the stopping overlapping surface and the locking angle increase. It is possible.

Therefore, by controlling the locking resistance force, it is possible to set the locking resistance force which is compatible with both the fall prevention of the balance weight and the ease of removal.

Next, the effect will be described.

(1) In the wheel balance weight that is attached by driving the substantially U-shaped clip 2 into the wheel rim portion 4, the clip 2 and the wheel rim portion 4
Since the hook-shaped locking portion 3 and the locking groove 5 which can control the locking resistance force are provided between the and, the balance weight can be prevented from falling off the wheel rim portion 4 and can be easily removed at the same time. it can.

(2) Since the retaining locking portion is composed of the hook-shaped locking portion 3 formed on the clip 2 and the locking groove 5 formed on the wheel rim portion 4, both locking portions Three
By setting the shape of at least one of 5, it is possible to control the locking resistance force.

(3) Since the hook-shaped locking portion 3 is formed by bending the tip of the clip 2 inward, the hook-shaped locking portion 3 can be easily formed.

(Second Embodiment) FIG. 5 is a perspective view showing a clip of a wheel balance weight of a second embodiment corresponding to the first invention, the second invention and the fourth invention, and FIG. 6 is a second embodiment. It is sectional drawing which shows the balance weight of an Example.

5 and 6, 1 is a weight, 2 is
Is a clip, and 23 is a hook-shaped locking portion (corresponding to the retaining locking portion d).

The hook-shaped engaging portion 23 is formed by making a substantially U-shaped cut in the clip 2 and bending the cut inward.

Since the other construction is the same as that of the first embodiment, its illustration and description are omitted.

The operation is the same as that of the first embodiment.

Next, the effect will be described.

The following effects are added to the effects (1) and (2) of the first embodiment.

(4) Since the hook 23 is formed by making a substantially U-shaped cut in the clip 2 and bending the cut inward, the plate member is fixed to the inner surface of the clip 2. As compared with the case where the hook-shaped locking portion is formed, the hook-shaped locking portion 23 can be formed without increasing the number of parts.

(Third Embodiment) FIG. 7 is a perspective view showing a clip of a wheel balance weight of a third embodiment corresponding to the first, fifth and sixth inventions, and FIG. 8 is a third embodiment. It is sectional drawing which shows the balance weight and wheel rim part of an Example.

7 and 8, 1 is a weight, 2 is
Is a clip, 4 is a wheel rim portion, 6 is a catch hole for removing the balance weight, and 7 is a burr protrusion (corresponding to the retaining locking portion d).

The burr projection 7 is intentionally formed on the rim side at the stage of manufacturing by punching the hook 6 for removing the balance weight which is opened in the clip 2.

The rest of the construction is the same as that of the first embodiment except that the wheel rim portion 4 is not provided with the retaining locking portion, so that the description thereof will be omitted.

Next, the operation will be described.

[Balance Weight Attaching Work] When attaching the balance weight to the wheel in order to balance the wheel, as shown in FIG. 8, a substantially U-shaped clip 2 fixed to the weight 1 is driven into the wheel rim portion 4. , The burr protrusion 7 formed on the clip 2 is fitted into the wheel rim portion 4 to be locked.

Therefore, as the retaining lock portion, it is sufficient to intentionally form the burr protrusion 7 on the rim side at the stage of manufacturing the hole 6 to be opened in the clip 2 by punching, and the wheel rim portion 4 side. Does not need to form a locking part.

The clip 2 is provided with a catch hole 6 for removing the balance weight in case of rebalancing the wheel for tire replacement or the like. The burr projection 7 is formed in the hole 6. Therefore, it is not necessary to set two holes, a hook hole for removing the balance weight and a hole with a dedicated burr projection.

[Locking resistance adjusting action] From the aspect of preventing the falling off, it is better to make it difficult to remove the balance weight. However, if it is difficult to remove the balance weight, when rebalancing the wheel by replacing the tires, etc.,
The work of removing the balance weight becomes difficult.

On the other hand, in the burr projection 7 which is the retaining locking portion, when the driving force of the clip 2 to the wheel rim portion 4 is weakened, the bite locking force of the burr projection 7 becomes weak.
When the driving force is increased, the bite locking force of the burr protrusion 7 is increased.
It is possible to control the locking resistance force by setting the strength of the driving force against.

Therefore, by controlling the locking resistance force, it is possible to set the locking resistance force that is compatible with both prevention of falling of the balance weight and easiness of removal.

Next, the effect will be described.

The following effect is added to the effect (1) of the first embodiment.

(5) The retaining locking portion is constructed by intentionally forming the burr protrusion 7 on the rim side at the stage of manufacturing the hole 6 to be opened in the clip 2 by punching. It is possible to control the locking resistance force by setting the locking portion only for the clip 2 which is advantageous to the above and the strength of the driving force.

(6) Since the hole to be opened in the clip 2 is the hook hole 6 for removing the balance weight, it is necessary to set two holes, the hook hole for removing the balance weight and the hole with a dedicated burr projection. It is possible to minimize the processing man-hours.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the present invention are included in the present invention. Be done.

For example, the specific structure of the retaining locking portion is not limited to that shown in the embodiment,
In short, any retaining locking portion provided between the clip and the wheel rim portion and capable of controlling the locking resistance force may be used.

[0081]

According to the first invention of claim 1,
In a wheel balance weight that is attached by driving a substantially U-shaped clip into the wheel rim,
Since the retaining lock part that can control the locking resistance is provided between the clip and the wheel rim part, it is possible to prevent the balance weight from falling off the wheel rim part and to easily remove it. The effect is obtained.

According to a second aspect of the present invention, in the wheel balance weight according to the first aspect, the retaining locking portion has a hook-shaped locking portion formed on a clip and a wheel rim portion. Since it is configured by the locking groove formed in the above, it is possible to achieve the effect of the first invention while controlling the locking resistance force by setting the shape of the locking portion.

According to a third aspect of the present invention, in the wheel balance weight according to the second aspect, the hook-shaped engaging portion is formed by bending the tip of the clip inward. The effect of the second invention can be achieved while easily forming the hook-shaped locking portion.

According to a fourth aspect of the present invention, in the wheel balance weight according to the second aspect, the key-like engaging portion has a substantially U-shaped cut in the clip,
Since the cut portion is formed by bending the cut portion inward, the effect of the second invention can be achieved while forming the key-like locking portion without increasing the number of parts.

According to a fifth aspect of the present invention, in the balance weight for a wheel according to the first aspect, the retaining locking portion is intended at the stage of manufacturing a hole formed in the clip by punching. Since it is configured by making a burr protrusion on the rim side, it is possible to set the locking portion only for the clip, which is advantageous in terms of cost, and to control the locking resistance force by the strength of the driving force. The effect of the invention can be achieved.

According to the sixth aspect of the present invention, in the wheel balance weight according to the fifth aspect, the holes opened in the clip are hook holes for removing the balance weight. The effect of the fifth invention can be achieved while minimizing the effect.

[Brief description of drawings]

FIG. 1 is a claim correspondence diagram showing a balance weight for a wheel of the present invention.

FIG. 2 is a perspective view showing a wheel balance weight according to the first embodiment.

FIG. 3 is a sectional view showing a balance weight and a wheel rim portion of the first embodiment.

FIG. 4 is a cross-sectional view showing an attached state of the balance weight according to the first embodiment.

FIG. 5 is a perspective view showing a clip of a wheel balance weight according to a second embodiment.

FIG. 6 is a sectional view showing a balance weight of a wheel balance weight according to a second embodiment.

FIG. 7 is a perspective view showing a clip of a wheel balance weight according to a third embodiment.

FIG. 8 is a sectional view showing a balance weight and a wheel rim portion of a third embodiment.

FIG. 9 is a cross-sectional view showing an attached state of a conventional balance weight.

[Explanation of symbols]

 a weight b clip c wheel rim part d retaining lock part

Claims (6)

[Claims] 1. A balance weight for a wheel, which comprises a weight and a clip fixed to the weight, and is attached by driving a substantially U-shaped clip into the wheel rim portion, wherein the clip and the wheel rim portion are provided. A balance weight for a wheel, characterized in that a retaining locking portion whose locking resistance is controllable is provided between the two. 2. The balance weight for a wheel according to claim 1, wherein the retaining locking portion includes a locking portion formed in a clip and a locking groove formed in the wheel rim portion. Balance weights for wheels that are characterized by 3. The wheel balance weight according to claim 2, wherein the hook-shaped locking portion is formed by bending a tip end portion of a clip inward. 4. The wheel balance weight according to claim 2, wherein the hook-shaped engaging portion is formed by making a substantially U-shaped cut in a clip and bending the cut inward. The balance weight for the featured wheel. 5. The balance weight for a wheel according to claim 1, wherein the retaining locking portion is formed by intentionally forming a burr protrusion on a rim side in a step of manufacturing a hole to be opened in a clip by punching. Balance weight for wheels characterized by being configured. 6. The wheel balance weight according to claim 5, wherein the hole opened in the clip is a hook hole for removing the balance weight.