JP4386567B2 - Vibration control wheel for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damping wheel for automobiles, and more particularly to a vibration damping wheel for automobiles that improves riding comfort and vehicle interior noise characteristics.
[0002]
[Prior art]
Conventionally, for example, Japanese Patent Laid-Open No. 6-344708 has proposed a vibration damping wheel for an automobile having a structure in which a vibration damping member made of a viscoelastic material is interposed at a joint between a disk and a rim. By interposing the vibration damping member in this manner, vibration transmitted from the tire side to the vehicle body side is suppressed, and riding comfort and vehicle interior noise characteristics are improved.
[0003]
However, the damping wheel as described above has a structure in which the damping member is arranged over a long range because the damping member is provided along the outer peripheral side coupling portion, and as a result, the weight of the wheel is increased. Further, since the weight on the outer peripheral side of the wheel is increased, there is a problem that the moment of inertia is increased.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a vibration damping wheel for an automobile that can improve ride comfort and vehicle interior noise characteristics while suppressing an increase in weight and moment of inertia.
[0005]
[Means for Solving the Problems]
In the automobile vibration damping wheel of the present invention that achieves the above object, the annular abutment surface (5) formed on the axle mounting side of the disk (2) has a damping member (8) with respect to the axle mounting surface. A vibration damping wheel for an automobile that is attached via a hole, wherein a hole (7) is formed in the contact surface (5) except for a peripheral portion of the bolt hole (6), and the hole (7) The vibration damping member (8) is protruded from the abutment surface (5) by a part of the surface of the vibration damping member (8), and most of the vibration damping member (8) is embedded in the metal plate (8A) . A plurality of shock absorbers (8B) made of rubber having a loss tangent tan δ measured at 20 Hz, temperature 60 ° C., initial strain 10% and amplitude ± 2% are alternately laminated and bonded. In addition, the material of the buffer (8B) is different between layers.
[0006]
With this configuration, the amount of the damping member used is reduced from the conventional amount to suppress an increase in weight and effectively suppress an increase in the moment of inertia, while the damping member moves from the tire side to the vehicle body side. Riding vibration and vehicle interior noise characteristics can be improved by suppressing transmitted vibration. It is also possible to suppress the vibration generated in the disk from being transmitted to the vehicle body side.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0010]
1 and 2 show a reference example of a vibration damping wheel for an automobile according to the present invention. This damping wheel 1 has a structure in which a rim 3 is integrally attached to the outer peripheral side of a disk 2. A hub hole 4 that accommodates the hub on the axle side is formed in the center of the disk 2, and an abutment surface 5 that contacts the axle side is provided in an annular shape on the outer peripheral side of the hub hole 4.
[0011]
Bolt holes 6 through which the axle-side coupling bolts are inserted are formed in the contact surface 5 at predetermined intervals. A hole 7 is formed in the contact surface 5 positioned between the bolt holes 6, and a damping member 8 that suppresses vibration is disposed in the hole 7. The damping member 8 is composed of a shock absorber made of rubber, and is slightly protruded from the contact surface 5 and embedded so as to be in contact with the axle side.
[0012]
By disposing the vibration damping member 8 on the contact surface 5 located on the inner peripheral side of the disk 2 in this way, vibration transmitted from the tire side to the vehicle body side is suppressed by the vibration damping member 8, and riding comfort and While it is possible to improve the vehicle interior noise characteristics, the length of the vibration damping member 8 can be made shorter than the conventional one to suppress an increase in weight and to effectively suppress an increase in moment of inertia. Moreover, the suppression effect which suppresses that the vibration which generate | occur | produces in the disk 2 is transmitted to the vehicle body side can also be acquired.
[0013]
3 and 4 show another example of the vibration damping wheel for an automobile of the present invention. In the above-described embodiment, the vibration damping wheel 1 is formed by forming the hole 7 in substantially the entire contact surface 5 excluding the peripheral portion of the bolt hole 6 and disposing the vibration damping member 8 there. The vibration damping member 8 is integrally formed by laminating a plurality of layers (three metal plates 8A and two buffer bodies 8B) of a ring-shaped metal plate 8A and a ring-shaped buffer body 8B made of rubber alternately. It is embedded in such a way that it protrudes slightly from the contact surface 5 and can contact the axle side. Even if it is such a structure, the effect similar to the above can be acquired.
[0015]
In the present invention, the above cushion 8B, as shown in FIG. 5, may be embedded in a rigid body 9 made of a metal having the same thickness as the cushion 8B. In this figure, a plurality of thin plate-like rigid bodies 9 extending from the inner edge to the outer edge of the ring-shaped buffer 8B are arranged at equal intervals.
[0016]
By providing the rigid body 9 in this manner, when the damping member 8 is formed by vulcanizing and bonding the metal plate 8A and the buffer body 8B, the unvulcanized rubber of the buffer body 8B flows out from the damping member 8. Can be prevented, the dimensional accuracy can be improved, and the damping function of the damping member 8 can be adjusted.
[0017]
Further, as shown in FIG. 6 , the buffer body 8B may be provided with a plurality of buffer areas 81B and 82B made of rubbers of different types (hardness). In this figure, a buffer region 81B is disposed at a portion where the bolt hole 6 is located, and a buffer region 82B is disposed therebetween.
[0018]
In the vibration damping wheel 1 having the vibration damping member 8 using the shock absorber 8B having such a configuration, the shock absorber portion 81B is made of rubber having high hardness, thereby increasing the rigidity of the mounting portion around the bolt hole 6. Therefore, the handling stability can be further improved. On the other hand, since the buffer body portion 81B is made of rubber having low hardness, the rigidity of the mounting portion around the bolt hole 6 can be reduced, so that riding comfort and vehicle interior noise characteristics can be improved. In the present embodiment, if necessary, a balance between steering stability, riding comfort, and vehicle interior noise characteristics can be selected as appropriate, and setting according to the target vehicle characteristics becomes possible.
[0019]
The metal plate 8A may be made of any metal, and for example, steel or aluminum can be preferably used. The plurality of layers of metal plates 8A may be composed of the same type or different types of metal plates, or may be the same thickness or different thickness of metal plates, and have rigidity according to the target vehicle characteristics. It can be selected as appropriate.
[0020]
On the other hand, the buffer layers 8B having a plurality of layers may have different thicknesses for each layer , and can be appropriately selected so as to have a buffer function according to the target vehicle characteristics. By making the type of each layer different, vibrations in a wide frequency range can be suppressed.
[0021]
The rubber used for the above-described shock absorber is a loss tangent tan δ measured using a dynamic viscoelasticity measuring device (Toyo Seiki Seisakusho) under the conditions of frequency 20 Hz, temperature 60 ° C., initial strain 10%, amplitude ± 2%. It is preferable to use rubber having 0.08 or more, preferably 0.15 or more. If the loss tangent tan δ is smaller than 0.08, it is difficult to effectively suppress the vibration transmitted to the axle side .
[0022]
Further, the vibration damping member 8 and the disk 2 can be joined together by mechanical means such as an adhesive, bolts and nuts.
[0023]
【The invention's effect】
As described above, since the automobile vibration damping wheel of the present invention is configured as described above, it is possible to improve riding comfort and vehicle interior noise characteristics while suppressing an increase in weight and moment of inertia.
[Brief description of the drawings]
FIG. 1 is a half rear view showing a vibration damping wheel for an automobile according to a reference example of the present invention.
FIG. 2 is a cross-sectional view of the main part of FIG.
3 is a half rear view of an automotive vibration damping wheel consisting of the implementation of the invention.
4 is a cross-sectional view of the main part of FIG. 3;
FIG. 5 is a front view of an essential part showing a modified example of the shock absorber in the present invention.
FIG. 6 is a front view of an essential part showing a further modification of the shock absorber in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Damping wheel 2 Disc 3 Rim 5 Contact surface 7 Hole part 8 Damping member 8A Metal plate 8B Buffer body 81B, 82B Buffer area 9 Rigid body

Claims (4)

An automobile damping wheel in which an annular contact surface (5) formed on an axle mounting side of a disc (2) is attached to an axle mounting surface via a damping member (8). ,
A hole (7) is formed on the abutting surface (5) except for the periphery of the bolt hole (6), and the damping member (8) is formed in the hole (7) with only a part of its surface. It protrudes from the abutment surface (5) and embeds most of it, and the damping member (8) has a metal plate (8A), a frequency of 20 Hz, a temperature of 60 ° C., an initial strain of 10%, and an amplitude of ± 2%. A structure in which a plurality of shock absorbers (8B) made of rubber having a loss tangent tan δ measured under conditions of 0.08 or more are alternately laminated and bonded, and the materials of the shock absorbers (8B) are different from each other between the layers. Anti-vibration wheel for automobiles.   The vibration damping wheel for an automobile according to claim 1, wherein a plurality of buffer regions (81B, 82B) made of a material different from that of the buffer body (8B) are arranged in the circumferential direction of the buffer body (8B).   The vibration damping wheel for an automobile according to claim 1, wherein a rigid body (9) having the same thickness as that of the buffer body (8B) is disposed in a circumferential direction of the buffer body (8B).   The vibration damping wheel for motor vehicles in any one of Claims 1-3 which made the material of the said metal plate (8A) differ between layers.

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