JP4394009B2 - Balance weight for tire wheels - Google Patents

Description

  The present invention relates to a balance weight for improving the balance of mass in a wheel assembly state in which an automobile tire is incorporated in a rim.

  In the wheel assembly state in which tires such as automobiles are incorporated in the rim, if the mass imbalance in the circumferential direction around the rotation axis of the wheel assembly and the mass imbalance in the rotation axis direction increase, a body called vibration or shake of the steering wheel A problem such as occurrence of vertical vibration of the sheet occurs. The vibration and noise generated during the driving are caused by the unbalance of the wheel assembly, and in order to cancel this unbalance, the unbalance of the wheel assembly is measured with a dedicated measuring machine and balanced so as to cancel it. A weight (also referred to as a wheel balance weight) is attached to the wheel to correct it.

  The shape of the conventional balance weight is shown in FIGS. FIG. 6 shows a set state before driving the balance weight, and FIG. 7 shows a state after driving the balance weight.

  The balance weight 1 includes a clip 4 made of a metal plate that is fixed to the rim portion 21 by sandwiching the rim portion 21 of the tire wheel 2, and a clip 4 that is positioned on the inner peripheral side of the rim portion 21 of the tire wheel 2. And a metal weight 5 fixed to the frame.

  The clip 4 has an inner peripheral side plate portion 41 and an outer peripheral side plate portion 42 that sandwich the rim portion 21 of the tire wheel 2, and is fixed to the rim portion 21. 43 is a surface that extends radially inward of the tire wheel 2 along the surface of the wheel portion 22 of the tire wheel 2 from the tip of the inner peripheral side plate portion 41 of the tire wheel 2 and the weight 5 does not face the wheel portion 22 of the tire wheel 2. And a weight fixing portion 44 fixed to the head.

  The inner peripheral side plate portion 41 of the rim clamping portion 43 is located on the inner peripheral surface side of the rim portion 21 of the tire wheel 2 and is linear in the tangential direction (direction perpendicular to the radial direction and the axial direction) of the tire wheel 2. The both ends in the circumferential direction of the inner peripheral side plate portion 41 are in contact with the inner peripheral surface (the peripheral surface on the inner peripheral side) of the rim portion 21 of the tire wheel 2. Similarly, the outer peripheral side plate portion 42 of the rim clamping portion 43 is located on the outer peripheral surface side of the rim portion 21 of the tire wheel 2 and extends linearly in the tangential direction of the tire wheel 2 in parallel with the inner peripheral side plate portion 41. It has a shape.

As the material of the conventional weight 5, lead or lead alloy that is easily plastically deformed is usually used. However, since the lead-based material has a problem such as a load on the natural environment, the clip 4 has the weight 5. For example, the following Patent Documents 1 to 3 propose that the material is made of an iron-based material.
Registered Utility Model Publication No. 3046046 JP 2002-54686 A JP 2002-61714 A

  However, since the clip 4 manufactured using an iron-based material has high rigidity, when the clip 4 is driven into the rim portion 21 of the tire wheel 2 with a hammer, both ends in the circumferential direction of the inner peripheral side plate portion 41 of the clip 4 are tires. The wheel 2 has a problem that it bites into and damages the inner peripheral surface of the rim portion 21 of the wheel 2.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a tire wheel capable of reducing damage to the rim portion that occurs when a clip of a balance weight is driven into the rim portion of the tire wheel while suppressing the complexity of the shape and structure. Its purpose is to provide a balance weight.

  The present invention will be described below. However, although the shape of the clip of the present invention described below is described on the assumption that it is mounted on a tire wheel, it should be interpreted in the sense that the mounted state of the tire wheel is such a shape. It should be construed to include a balance weight for a tire wheel before mounting the tire wheel.

The balance weight for a tire wheel of the first invention made to solve the above problems is a clip made of a metal plate fixed to the rim portion by sandwiching a rim portion which is an outer peripheral edge portion of the tire wheel, A metal weight that is positioned on the inner peripheral side of the tire wheel rim and fixed to the clip, and the clip includes an inner peripheral plate and an outer peripheral plate that sandwich the rim of the tire wheel. A rim sandwiching portion having a substantially U-shaped cross section having a portion, and a wheel portion of the tire wheel extending radially inward from the rim portion, and from the vicinity of an inner peripheral side plate portion of the rim sandwiching portion of the tire wheel. A tire wheel having a shape extending radially inward and having a weight fixing portion on which the weight is fixed to a surface not facing the wheel portion of the tire wheel. In the balance weight for Le,
The weight fixing part is formed separately from the rim clamping part and engages the rim clamping part so as to be stationary with respect to the tire wheel when the rim clamping part is driven into the rim part, It has a shape that is clamped and fixed together with the rim portion by the rim clamping portion after the driving.

  In the above description, the circumferential direction means the circumferential direction of the tire wheel, the inner circumferential side means the radially inner side of the tire wheel, and the outer circumferential side means the radially outer side of the tire wheel. . Further, the rim portion of the tire wheel referred to above has an inner peripheral surface facing the inner peripheral side plate portion of the rim clipper and the outer peripheral side plate portion of the weight holder. The peripheral surface on the inner peripheral side is the tire wheel. It is not necessary for each part in the axial direction to have the same diameter, and the diameter usually increases as the distance from the tire wheel increases.

  That is, according to the present invention, the clip to which the weight is fixed is divided into two members, that is, a rim holding part for holding the rim part of the tire wheel and a weight fixing part for fixing the weight, and the rim is held at least after driving. The part clamps and fixes the weight fixing part together with the rim part of the tire wheel.

  Further, in the present invention, the rim clamping portion is movable relative to the weight fixing portion in the driving direction when driven, so that the weight fixing portion is stationary on the tire wheel when driving the rim clamping portion into the rim portion of the tire wheel. Can be fixed. Thus, according to the present invention, when the rim clamping portion is driven, the weight fixing portion that contacts the tire wheel can be made stationary with respect to the tire wheel. It is possible to prevent the peripheral surface on the inner peripheral side of the rim portion or the coating film thereon from being damaged.

  Furthermore, in this invention, when driving the rim clamping part into the rim part of the tire wheel, the rim clamping part is driven so as to integrally clamp the rim part and the weight fixing part on the inner peripheral side of the rim part. Since the inner peripheral side plate portion of the rim clamping portion prevents contact with the rim portion by the weight fixing portion at the time of driving, it is possible to prevent the rim clamping portion from damaging the surface of the rim portion.

  The tire wheel is damaged because both end portions in the circumferential direction of the inner peripheral side plate portion of the rim clamping portion bite into the peripheral surface on the inner peripheral side of the rim portion of the tire wheel. Therefore, it is preferable to arrange both ends in the circumferential direction of the weight fixing portion so that both ends in the circumferential direction of the inner peripheral side plate portion of the rim clamping portion clamp the rim portion through the weight fixing portion. For example, the circumferential length of the weight fixing portion is preferably formed beyond that of the rim clamping portion.

  In a preferred aspect, the weight fixing portion extends toward the outer side in the axial direction of the tire wheel with a predetermined distance from the outer peripheral surface portion of the weight between the rim portion of the tire wheel and the outer peripheral surface portion of the weight. A circumferential plate portion having a shape that extends from the end of the circumferential plate portion on the tire wheel side toward the wheel portion of the tire wheel while extending radially inward of the tire wheel and the weight of the tire wheel A diameter plate portion fixed to the surface not facing the wheel portion, and at least a tip portion of the inner peripheral side plate portion of the rim clamping portion is displaceable in the driving direction and cannot be dropped off. It is held in a gap between the rim portion of the wheel and the outer peripheral surface portion of the weight.

  That is, according to this aspect, the weight fixing portion has a peripheral plate portion and a radial plate portion formed in a substantially L shape as a whole, and the inner peripheral side plate portion of the rim clamping portion is the peripheral plate portion and the outer peripheral surface portion of the weight. Therefore, the inner peripheral side plate portion of the rim clamping portion can be satisfactorily held between the weight and the peripheral plate portion of the weight fixing portion, and the driving operation is facilitated.

  In a preferred aspect, the distal end portion of the peripheral plate portion of the weight fixing portion passes through an opening provided in the inner peripheral side plate portion of the rim holding portion and engages with the rim holding portion. In this way, it is easy to hold the rim clamping portion and the weight fixing portion integrally in a manner that allows relative displacement in the driving direction and is difficult to separate from each other, and it is possible to facilitate driving operations and parts handling before that.

  In a preferred aspect, the distal end portion of the peripheral plate portion of the weight fixing portion is close to the outer peripheral surface portion of the weight after passing through the opening of the inner peripheral side plate portion of the rim clamping portion. In this way, since the engagement between the inner peripheral side plate portion of the rim clamping portion and the peripheral plate portion of the weight can be made more reliable, workability can be further improved. The term “proximity” as used herein means a state where the clearance between the distal end portion of the peripheral plate portion of the weight fixing portion and the outer peripheral surface portion of the weight is less than 2 mm, more preferably less than 1 mm.

  Preferred embodiments of the present invention are described below. However, the present invention should not be construed as being limited to these embodiments, and it is needless to say that the technical idea of the present invention may be realized by other known components or equivalent components. In addition, the code | symbol used for drawing used for description of the following Example is unrelated to the code | symbol used in FIGS. 5-7 for description of a prior art.

(Example)
The balance weight for the tire wheel of an Example is demonstrated with reference to drawings. . FIG. 1 is an axial sectional view of the balance weight, and FIG. 2 is a front view of the balance weight viewed from the axial direction. In addition, the circumferential direction, the axial direction, and the radial direction in this embodiment refer to those of the tire wheel. In the following description, the rim portion 21 of the tire wheel 2 means an outer peripheral edge portion of the outer peripheral portion of the tire wheel 2 that is far away from the tire wheel 2, and the wheel portion 22 of the tire wheel 2 is The portion extending radially inward from the rim portion 21 is assumed.

(Balance weight 1)
The balance weight 1 includes a clip 4 made of an iron plate that is fixed to the rim portion 21 by sandwiching a rim portion 21 that is an outer peripheral edge portion of the tire wheel 2, and an inner peripheral side of the rim portion 21 of the tire wheel 2. And a weight 5 made of a ferrous material and fixed to the clip 4. In this embodiment, the clip 4 is divided into a rim clamping portion 6 and a weight fixing portion 7, and the weight 5 is caulked and fixed to the surface of the weight fixing portion 7 that does not face the wheel portion 22 of the tire wheel 2. ing.

  Hereinafter, the rim clamping part 6 and the weight fixing part 7 which are independent member pieces will be described in more detail.

(Basic shape of the rim clamping part 6)
The rim clamping part 6 has an inner peripheral side plate part 61, an outer peripheral side plate part 62, and a radial direction plate part 63 connecting the inner peripheral side plate part 61 and the outer peripheral side plate part 62, which sandwich the rim part 21 of the tire wheel 2. And the axial cross section fixed to the rim | limb part 21 is a substantially U-shaped member, and is manufactured by press-molding an iron-type material. The inner peripheral side plate portion 61 is disposed on the inner peripheral side of the rim portion 21, and the outer peripheral side plate portion 62 is disposed on the outer peripheral side of the rim portion 21, and extends in the circumferential direction or tangential direction of the rim portion 21, respectively.

(Basic shape of weight fixing part 7)
The weight fixing part 7 extends along the wheel part 22 of the tire wheel 2 from the peripheral plate part 71 locked to the inner peripheral side plate part 61 of the rim clamping part 6 and the edge of the peripheral plate part 71 on the tire wheel 2 side. Further, the cross section in the axial direction including the radial plate portion 72 extending radially inward is a substantially L-shaped member, and is formed separately from the rim clamping portion 6. The peripheral plate portion 71 of the weight fixing portion 7 is disposed closer to the peripheral surface on the inner peripheral side of the rim portion 21 than the inner peripheral side plate portion 61 of the rim clamping portion 6. The rim portion 21 extends in the circumferential direction or tangential direction while being in close contact with the inner circumferential surface. A weight 5 is caulked and fixed by caulking portions 45 and 46 to the surface of the weight fixing portion 7 on the side not facing the tire wheel 2 of the diameter plate portion 72, and the weight 5 extends in a substantially tangential direction.

(Locking structure between the rim clamping part 6 and the weight fixing part 7)
A locking structure between the rim clamping part 6 and the weight fixing part 7 constituting the clip 4 will be described with reference to FIG.

  An opening 64 is formed at a corner portion between the inner peripheral side plate portion 61 and the radial direction plate portion 63 of the rim clamping portion 6 so as to be located at the circumferential central portion of the rim clamping portion 6.

  The distal end portion of the peripheral plate portion 71 of the weight fixing portion 7 is provided with a fitting distal end portion 73 that is located in the central portion in the circumferential direction and extends radially inward, that is, in a direction toward the outer peripheral surface portion 51 of the weight 5. Yes. The fitting tip 73 penetrates through the opening 64 of the rim clamping part 6, and the tip reaches the outer peripheral surface part 51 of the weight 5. The axial width of the opening 64 is secured to be greater than the driving amount when the rim clamping portion 6 is driven into the rim portion 21, so that the rim clamping portion 6 can be moved to the rim portion 21 without moving the weight fixing portion 7. It is possible to drive in.

  Due to the fitting of the opening 64 and the fitting tip 73, the rim clamping part 6 is substantially undisplaceable in the circumferential direction and the radial direction with respect to the weight fixing part 7, and separation of both can be suppressed. .

  Furthermore, in this embodiment, the distal end portion of the inner peripheral side plate portion 61 of the rim clamping portion 6 is bent in the radial direction, and the radial direction between the peripheral plate portion 71 of the weight fixing portion 7 and the outer peripheral surface portion 51 of the weight 5 is increased. Since it is held in the gap, it is possible to more satisfactorily prevent the rim clamping part 6 from falling off the weight fixing part 7.

(Balance weight driving operation)
Hereinafter, the operation of driving the balance weight 1 will be described. FIG. 1 shows a state immediately before setting the balance weight 1 on the rim portion 21 before driving. First, when the weight fixing portion 7 is brought into contact with a predetermined position of the wheel portion 22 of the tire wheel 2 and then the rim clamping portion 6 is driven in the driving direction shown in FIG. 1, only the rim clamping portion 6 is driven and the weight fixing is performed. Part 7 does not move. At this time, the opening 64 of the rim clamping part 6 moves relative to the fitting tip part 73 of the weight fixing part 7 penetrating the opening 64 in a substantially axial direction. Along with driving, the inner peripheral side plate portion 61 and the outer peripheral side plate portion 62 of the rim clamping portion 6 clamp and fix the rim portion 21 of the tire wheel 2 and the peripheral plate portion 71 of the weight fixing portion 7 together.

  In this driving operation, the rim clamping unit 6 is movable relative to the weight fixing unit 7 in the driving direction, so that the weight fixing unit 7 can be stationary and fixed to the tire wheel 2. Thereby, it is possible to prevent the peripheral surface on the inner peripheral side of the rim portion 21 or the coating film thereon from being damaged by the weight fixing portion 7.

  Furthermore, when driving the rim clamping part 6 into the rim part 21, the peripheral plate part 71 of the weight fixing part 7 contacts the inner peripheral side plate part 61 of the rim clamping part 6 with the inner peripheral side surface of the rim part 21. Therefore, it is possible to prevent the rim clamping part 6 from damaging the surface of the rim part 21. Although the circumferential width of the weight fixing portion 7 is set to be substantially equal to the circumferential width of the rim clamping portion 6, the circumferential width of the weight fixing portion 7 may be further increased.

(Example effect)
As described above, after the rim clamping part 6 is driven into the rim part 21, the inner peripheral side plate part 61 of the rim clamping part 6 includes the peripheral plate part 71 of the weight fixing part 7 and the rim part 21 of the tire wheel 2. Thus, the weight fixing part 7 can be fixed so as not to move relative to the rim part 21. Further, the inner peripheral side plate portion 61 of the rim clamping portion 6 does not directly contact the inner peripheral side peripheral surface of the rim portion 21 at the time of driving, but instead of the peripheral plate portion 71 of the stationary weight fixing portion 7. Since the rim portion 21 is pinched through, the inner peripheral side plate portion 61 of the rim sandwiching portion 6, particularly the both ends in the circumferential direction, will not be damaged by the driving of the rim sandwiching portion 6.

(Additional information)
The weight 5 can be manufactured by performing cold forging after cutting a wire such as a steel bar into a predetermined length. The clip 4 can be given springiness by quenching after being formed by press forming, sheet metal processing, or the like. Although the cross section of the clip 4 is substantially U-shaped, it is natural to include a C-shape.

(Modification 1)
A modification will be described with reference to FIG. In this modification, an opening 74 is provided in the fitting tip 73 of the peripheral plate portion 71 instead of the opening 64 of the rim holding portion 6, and the inner peripheral side plate portion 61 of the rim holding portion 6 is inserted into the opening 74. Yes, the same effects as in the above embodiment can be obtained.

(Modification 2)
A modification will be described with reference to FIG. In this modification, instead of the opening 64 of the rim clamping part 6, a groove part 75 is provided in the fitting tip part 73 of the peripheral plate part 71, and the inner peripheral side plate part 61 of the rim clamping part 6 is inserted into this groove part 75. It is. The groove portion 75 is substantially closed by the outer peripheral surface portion 51 of the weight 5, and has substantially the same function as the opening 74 in FIG.

(Modification 3)
In addition, the rim clamping unit 6 and the weight fixing unit 7 may omit the fitting structure using the opening and the groove.

(Modification 4)
In addition, the weight fixing portion 7 may be formed of the same member as the weight 5.

It is an axial sectional view of the balance weight of an example. It is the front view which looked at the balance weight of FIG. 1 from the axial direction. It is an axial sectional view of the balance weight of modification 1. It is an axial sectional view of the balance weight of modification 2. It is the front view which looked at the conventional balance weight from the axial direction. FIG. 6 is an axial sectional view of the balance weight of FIG. 5 (before driving). FIG. 6 is an axial sectional view of the balance weight of FIG. 5 (after driving).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Balance weight 2 Tire wheel 4 Clip 5 Weight 6 Rim clamping part 7 Weight fixing part 21 Rim part 22 Wheel part 51 Outer peripheral surface part 61 Inner peripheral side board part 62 Outer peripheral side board part 63 Radial direction plate part 64 Opening 65 Groove part 71 Peripheral board part 72 Diameter plate part 73 Mating tip part 74 Opening 75 Groove part

Claims (4)

A clip made of a metal plate that is fixed to the rim portion by sandwiching a rim portion that is an outer peripheral edge portion of the tire wheel, and that is positioned on the inner peripheral side of the rim portion of the tire wheel and fixed to the clip. A metal weight,
The clip
A rim sandwiching section having a substantially U-shaped cross section having an inner peripheral side plate part and an outer peripheral side plate part for sandwiching the rim part of the tire wheel;
The weight has a shape extending radially inward of the tire wheel from the vicinity of the inner peripheral side plate portion of the rim clamping portion while facing the wheel portion of the tire wheel extending radially inward from the rim portion. A weight fixing portion fixed to a surface of the tire wheel that does not face the wheel portion;
In a balance weight for a tire wheel having
The weight fixing part is
The rim clamping portion is formed separately from the rim clamping portion, and engages with the rim clamping portion so as to be stationary with respect to the tire wheel when the rim clamping portion is driven into the rim portion. A balance weight for a tire wheel characterized by having a shape that is sandwiched and fixed together with the rim portion by a portion. In the balance weight for a tire wheel according to claim 1,
The weight fixing part is
A peripheral plate portion having a shape extending between the outer peripheral surface portion of the weight and the outer peripheral surface portion of the weight with a predetermined distance from the outer peripheral surface portion of the weight wheel toward the outer side in the axial direction of the tire wheel;
The surface of the peripheral plate portion that faces the wheel portion of the tire wheel while facing the wheel portion of the tire wheel while extending inward in the radial direction of the tire wheel, and the surface on the side where the weight does not face the wheel portion of the tire wheel A diameter plate portion fixed to the shape,
At least the tip portion of the inner peripheral side plate portion of the rim clamping portion is
A balance weight for a tire wheel, which is held in a gap between a rim portion of the tire wheel and an outer peripheral surface portion of the weight so as to be displaceable in the driving direction and not dropout. In the balance weight for a tire wheel according to claim 2,
The tip of the peripheral part of the weight fixing part is
A balance weight for a tire wheel, wherein the balance weight for a tire wheel penetrates through an opening provided in an inner peripheral side plate portion of the rim clamping portion and engages with the rim clamping portion. In the balance weight for a tire wheel according to claim 3,
A balance weight for a tire wheel, wherein a front end portion of a peripheral plate portion of the weight fixing portion passes through an opening of an inner peripheral side plate portion of the rim clamping portion and is close to an outer peripheral surface portion of the weight. .

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