KR101539202B1 - Automobile wheel having the noise reduction measures - Google Patents

Abstract

More particularly, the present invention relates to an automotive wheel having a noise attenuating means capable of attenuating noise such as vibration, noise and high heat generated in a wheel and a tire during running of a vehicle, And the damping means are integrally cast with the rim and the spokes and have excellent mechanical strength.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle wheel having noise reduction means,

More particularly, the present invention relates to an automotive wheel having a noise attenuating means capable of attenuating noise such as vibration, noise and high heat generated in a wheel and a tire during running of a vehicle, And the damping means are integrally cast with the rim and the spokes and have excellent mechanical strength.

Generally, an automobile tire has an inner circumferential surface coupled to the inside of a rim constituted by a wheel, and functions to elastically support a vehicle body by filling air.

Since the tire is subjected to continuous friction with the road surface during traveling of the vehicle, noise is generated inside the tire, and tire noise is caused by many causes. For example, tire noises include (1) low frequency shock waves generated by the excitation of the internal tire air chamber from tire deformation caused by contact of the tire with the road surface; (2) Low frequency tire structure due to air chamber excitation caused by deformation of the tire during road contact; ringing; (3) high frequency external tread air compression caused by the air temporarily caught between the tread and the road surface; And (4) high frequency contact scrubs caused by friction between the tire and the road surface.

In the case of noise, the noise is reflected between the inner surface of the tire and the rim, causing a resonance phenomenon. Then, a sound having a sharp peak is transmitted to the inside of the vehicle, Not only caused a feeling of discomfort due to the continuous noise, but also caused a decrease in ride comfort.

To solve this problem

Japanese Unexamined Patent Application Publication No. 2002-240507 (hereinafter referred to as Prior Art 1) discloses a method for reducing the resonance noise of a tire, in which a spherical sound absorbing material of 40 to 100 mm is inserted into the tire without being fixed, thereby reducing the resonance noise of the tire A method was proposed. The method of inserting the sound absorbing material as described above has a disadvantage in that the cost is increased and the weight is increased. In particular, the resonance sound can not be effectively reduced because it is easily detached from the tire due to deterioration in durability with the tire adhering portion.

Korean Patent Laid-Open Publication No. 10-2006-0044653 (hereinafter referred to as Prior Art 2) discloses a technique in which a hollow chamber is formed in the rim to block noise. In addition to the prior art 2, a technique for forming a hollow in the rim and spoke is disclosed in Korean Patent Laid-Open Publication No. 1999-0062973 and Laid-Open Patent Publication No. 10-2013-0044465. There is a durability effect, but a sound absorption effect is unsatisfactory.

In Korean Patent Laid-Open Publication No. 10-2007-0053386 (hereinafter referred to as Prior Art 3), a technique has been proposed in which a hollow chamber is formed in a rim and an aluminum foam core is filled therein to absorb noise and vibration. In addition to the prior art 3, a technique of forming a hollow in the rim and the spoke and filling the foam core with the hollow is also disclosed in Korean Patent Laid-Open Publication No. Hei 10-2001-0072401, The sound absorption effect is higher than that of the prior art document 2, but the caustic ratio is low.

Korean Patent Laid-Open Publication No. 10-2008-0038312 (hereinafter referred to as Prior Art 4) discloses a technique in which a fabric layer is attached to a rim and expanded by heat generated in a tire according to traveling of a vehicle to serve as a hollow chamber have. However, this is disadvantageous in that the sound absorption effect is high, but the resonance sound can not be effectively reduced because it is easily detached from the tire due to deterioration of the durability of the fabric layer.

Prior Art 1: Japanese Patent Application Laid-Open No. 2002-240507 Prior Art 2: Korean Patent Publication No. 10-2006-0044653 Prior Art 3: Korean Patent Publication No. 10-2007-0053386 Prior Art 4: Korean Patent Publication No. 10-2008-0038312

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a vehicle wheel equipped with a noise attenuating means according to the present invention, which is easier to manufacture than a prior art in which a sound absorbing material is installed, a hollow is formed, And to form a new concept of damping means which is superior in vibration, noise and high temperature offset.

In order to solve the above problems, an automobile wheel equipped with a noise attenuating means according to the present invention includes a central hub 21, a rim 22 forming an outer rim, a hub 22 connected to the hub 21, Wherein the noise attenuating means comprises a standing pole and a connecting beam, wherein the standing pole has two or more than two standing spokes (23) And the connection view connects the vertexes to each other.

In order to solve the above-described problems, the automobile wheel having the noise reducing unit according to the present invention includes a central hub 21, a rim 22 forming a rim, a hub 22 and a rim 22, Wherein the noise attenuating means is a truss including a standing post and a connecting post, wherein the standing post has two or more than two standing spokes And the connection view connects the vertexes to each other.

Further, the noise attenuating means forms two or more rows.

In addition, the connection view is alternately connected to the vertexes formed in the same column.

Further, the connection view alternately connects truss vertices formed in the same column, wherein the connection view is alternated between columns.

Further, the connection view is connected to truss vertices formed in different columns.

The automobile wheel having the noise attenuating means according to the present invention having the above-described features is advantageous in that since the attenuation means composed of the protrusion and / or the truss is formed inside the rim and / or the spoke, The vibration and the high temperature as well as the noise can be sufficiently canceled by the damping means as compared with the prior art in which the cavity is formed and the foaming alloy is filled therein. As a result, the noise transmitted to the room through the vehicle body can be greatly reduced, And the weight can be reduced.

1 and 2 are a perspective view and a cross-sectional view of a general automobile wheel;
3 is a perspective view showing a protrusion formed on a rim of a vehicle wheel having noise reducing means according to the present invention.
4 to 9 are a perspective view showing a truss formed on a rim of an automotive wheel having a noise attenuating means according to the present invention,
10 is a perspective view showing protrusions and trusses formed on spokes of an automobile wheel having noise reducing means according to the present invention;
FIG. 11 is a view showing an air flow of an automotive wheel having noise reducing means according to the present invention. FIG.

The term used in the present invention is a general term that is widely used at present. However, in some cases, there is a term selected arbitrarily by the applicant. In this case, the term used in the present invention It is necessary to understand the meaning.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

1 and 2, a vehicle wheel 20 having a noise attenuating unit according to the present invention includes a hub 21 as a center part, an outer frame (not shown) And a plurality of spokes 23 connecting the hub 21 and the rim 22.

Here, the noise attenuating means according to the present invention can be formed on the rim or / and the spoke. First, the configuration formed on the rim will be described.

The rim 22 includes a tire closing surface 22a to which the tire is joined to form a closed space with the tire, and a tire opposing surface 22b exposed to the air.

That is, the tire facing surface 22b is a portion located at a certain distance from the brake disk after the automotive wheel is engaged with the brake disk (not shown).

Here, noise canceling means of the present invention including improvements is formed on the tire facing surface 22b.

The noise attenuating means serves to attenuate noise generated inside the tire due to continuous friction between the tire and the road surface during traveling of the vehicle.

Here, noise includes not only vibrations and noise but also heat, and includes elements harmful to the function of the vehicle.

That is, when the vehicle travels, the sidewall of the tire vibrates due to friction of the tire due to the road surface, resonance occurs in the inner space of the tire due to the vibration of the sidewall, Resonance sounds are generated in the frequency range of 200 Hz to 300 Hz.

In addition, high temperature due to friction is present in the inner space of the tire.

In order to effectively dissipate such noise and to prevent the noise from being transmitted to the tire itself, the present invention forms noise reducing means having a larger contact area with the air on the tire facing surface 22b exposed to the air, The noise generated in the air is radiated to the air to attenuate the noise.

To this end, the noise attenuating means is formed to protrude protrusions and / or trusses at regular intervals along the circumference of the rim.

Referring to FIG. 3, the protrusions 100 are formed in a double row along the circumference of the rim, which is spaced apart from the tire facing surface 22b of the rim exposed in the air.

The tire is rotated at a high speed according to the driving of the vehicle so that the protrusion formed on the tire facing surface 22b of the rim exposed to the air also rotates at a high speed and comes into contact with the outside air between the brake discs.

The projections spread the noise radiating area generated inside the tire to effectively dissipate noise (reflections and diffracted sounds), vibration, and high heat in the air to prevent transmission to the vehicle body.

In the present invention, the protrusions are formed in a trapezoidal structure, but they may be any of circular, triangular, rectangular, and trapezoidal shapes in the longitudinal direction, that is, the A-A direction. This shape is not limited to the present embodiment as long as it is a structure that meets the object of attenuating noise by widening the contact area with air. Further, it is necessary to appropriately form the height so as not to interfere with the tire disk.

In addition, although the protrusions have a single protrusion with one protrusion, the protrusions may be formed at one vertex so that the noise transmitted through the protrusions may be offset from each other at the apexes. .

4 to 9, the truss 200 includes a standing post 210 and a connecting beam 250 for connecting the standing post 210 and the truss 200. The truss 200 also has a predetermined interval And is formed as a double row along the circumference.

The standing pillars 210 are formed so that two or more standing pillars 210 are engaged at one vertex 230. That is, the plurality of standing pillars 210 are sloped and protruded from the tire facing surface 22b of the rim to be engaged with each other at the vertex 230.

In this regard, when forming the upright post on the opposite surface 22b, it is preferable to form two to four, preferably considering the easiness of formation and the noise damping effect. In order to prevent interference with the tire disk, It is preferable to form it appropriately.

Referring to FIG. 11, the noise generated inside the tire is more effectively radiated through the airflow flow space E formed between the standing pillars up to the vertex on the standing pillars 210.

That is, the tire wheel also rotates at a high speed according to the acceleration of the vehicle. At this time, the truss of the rim also rotates at a high speed. Noise generated in the tire rises up to the vertex of the airflow flow space E ) To the outside while being in contact with fresh outside air that escapes at high speed.

In the present invention, the upright column is formed as a columnar column, but may be any one of a triangular column, a square column, and a trapezoidal column.

In addition, the standing pillars 210 form two or more rows for effective divergence of noise, and a connecting beam 250 connecting apexes of the standing pillars is further formed to form a truss.

In the present invention, it is assumed that three columns are formed. Here, referring to FIGS. 4 and 5, the connecting beam 250 may be alternately connected to the vertexes of the standing pillars formed in the same column.

That is, the connecting beam 250 connects the first standing pole 210a and the second standing pole 210b in the truss 200-1 of the first column and then connects the third standing pole 210c to the fourth standing pole 210d The connecting beam is connecting.

The second column truss 200-2 and the third column truss 200-3 are also formed in the same structure as the first column truss 200-1 so that the trusses are formed in the same connection form in each column as a whole .

As another embodiment of the present invention, referring to FIGS. 6 and 7, the connection view is formed by alternately connecting truss vertices formed in the same column, wherein the connection views are alternated between columns.

That is, the connecting beam 250 connects the first standing pole 210a and the second standing pole 210b in the truss 200-1 of the first column and then connects the third standing pole 210c to the fourth standing pole 210d The connecting beam is connecting.

The second column truss 200-2 connects the other standing pillars and the first standing pillars 210a to the connecting pillars 250 and then connects the second standing pillars 210b and the third standing pillars 210c The connecting beam 250 is connected, and the fourth standing pole 210d and the other standing pole not shown are connected to the connecting beam.

Next, the third column truss 200-3 is formed in the same structure as the first column truss 200-1, so that the truss vertices formed in the same column as the entire connection view are alternately connected, Respectively.

As another embodiment of the present invention, referring to FIGS. 8 and 9, the connection view is formed to be connected to truss vertices formed in different columns.

That is, the connecting beam 250 connects the first standing column 210a in the truss 200-1 of the first column and the second standing column 210b in the truss 200-2 of the second column, and then the truss 200 -1) connects the third standing pole 210c to the fourth standing pole 210d from the truss 200-2 of the second row.

The connecting beam 250 connects the first standing column 210a of the second column truss 200-2 and the second standing column 210b of the third column truss 200-3 to the second column truss 200-3, And the fourth riser column 210d of the third column truss 200-3 are connected to the connection beam 250. The connection of the third riser column 210c of the third column truss 200-1 and the fourth riser column 210d of the third column truss 200-3 is connected to the truss vertexes formed in different columns .

In this case, when the connecting beams are formed so as to be connected to the vertexes of the trusses formed in different columns, the second standing column 210b in the truss 200-1 of the first row has the same structure as the aptamer 210b. In this case, Structure.

That is, the standing column that is not connected to the other standing column by the connecting beam may be the same as the double row projection.

The case where the noise attenuating means according to the present invention is formed on the spokes will be described.

3, 4, 6 and 8, the noise attenuating means may be formed on the spokes 23 in addition to the rim. In the present invention, in the case where the spokes have the depressed portions 23k But the damping means need not be formed in the spokes.

When the depressed portion 23k is formed, it is preferable that the height of the depressed portion does not deviate from the height of the depressed portion to prevent interference with the tire disk.

As the noise attenuation means formed in the spokes, the projections 100 and the trusses 200 have the same structure as the projections and trusses formed in the rim.

However, as shown in FIG. 10, the spacing between the projections 100 and the truss 200 corresponds to the shape of the spokes.

That is, the first column truss is formed to be longer than the second column truss, and is provided so as to correspond to the shape of the spoke as a whole.

Accordingly, the connection of the first thermal truss 200 formed in the connecting view spoke has a feature longer than the connection beam of the second thermal truss.

In addition, it is clear that the rim and the spoke are provided with a combination of a projection and a truss, but they are within the scope of the present invention.

Meanwhile, in the method of manufacturing the vehicle wheel 20 according to the present invention, the hub 21, the spokes 23, and the rim 22 are integrally formed by a low-pressure casting method of an aluminum alloy material.

Here, although an aluminum alloy material is taken as an example, it may be desirable to have the main component of the light alloy because the mechanical strength and light weight of the vehicle wheel are required. Specifically, the main component may preferably be an aluminum alloy or a magnesium alloy.

In addition, it is preferable that the noise reducing means is integrally formed with the rim 21 and the spokes 23 by a low-pressure casting method at the time of manufacture in order to facilitate manufacturing and stiffness of the structure.

Alternatively, the noise attenuating means may be integrally combined by FRICTION STIP WELDING (FSW) or MIG Welding (METAL INERT GAS WELDING), which improves the physical properties of the joint through melting, coagulation and plastic deformation . In this case, the material of the noise attenuating means is different from the material of the wheel, and there is an advantage that a material having a good noise reducing effect can be selected.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Various modifications and variations will be possible without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being covered by the scope of the appended claims, and technical scope within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

20: Automotive wheel
21: hub 22: rim 23: spoke
100: projection
200: Truss
210: standing column 230: vertex 250: connecting beam

Claims (9)

A vehicle wheel comprising a hub (21) at a central portion, a rim (22) forming an outer rim, and a plurality of spokes (23) connecting the hub (21)
Noise reduction means is formed on the tire facing surface of the rim,
The noise attenuating means is a truss including a standing pole 210 and a connecting beam 250,
At least two of the standing pillars are engaged at one vertex 230,
And the connection points connect the vertexes to each other.
A vehicle wheel comprising a hub (21) at a central portion, a rim (22) forming an outer rim, and a plurality of spokes (23) connecting the hub (21)
Noise reduction means is formed on the inner surface of the spokes,
The noise attenuating means is a truss including a standing pole 210 and a connecting beam 250,
At least two of the standing pillars are engaged at one vertex 230,
And the connection points connect the vertexes to each other.
The method according to claim 1 or 2,
Wherein the noise attenuating means forms two or more rows of the noise reducing means.
delete delete delete The method of claim 3,
Wherein the connection views are alternately connected to the vertexes (230) formed in the same column.
The method of claim 3,
The connection view alternately connects vertices 230 formed in the same column,
Characterized in that said connected connections are alternated between columns.
The method of claim 3,
And the connection points are connected to vertexes (230) formed in different columns.

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