KR102139135B1 - Airless tire for vibration and noise down - Google Patents

Abstract

The present invention relates to an airless tire for reducing vibration noise, and is formed along an inner circumferential surface of the tread so as to support stiffness or load while being coupled to a wheel in which an axle is connected to a tread formed in contact with the road surface. In the airless tire comprising a spoke portion, the spoke portion is a spoke circumferential bar formed in an isosceles trapezoidal shape, a spoke diagonal bar formed diagonally to divide the space formed by the spoke circumferential bar, and the spoke circumferential bar is a spoke diagonal bar. It consists of a main core formed in a first space formed close to a tread while being divided, and a sub-core formed in a second space formed close to a wheel on the other side of the first space, to support the load of the vehicle. It has stiffness so as to be able to support the load and distribute the load pressure, as well as forming a spoke portion to offset and suppress the vibration noise when the tire rolls so that the vibration noise reduction by the tire is improved. There is one effect.

Description

Airless tire for vibration and noise down

The present invention relates to an airless tire for reducing vibration noise, specifically, while maintaining rigidity to support a load of a vehicle, supporting load and dispersing load pressure, as well as vibration noise when the tire rolls. It relates to an airless tire for reducing vibration noise to enable quiet driving of the vehicle through improvement of reduction in vibration noise caused by the tire by forming a spoke portion capable of canceling and suppressing.

In general, airless tires have already been widely disclosed, and detailed descriptions thereof are omitted, and Patent No. 10-1411103 "Non-pneumatic tires", Patent No. 10-1362120 "Airless tires", and Patent Publication No. 10-2012 -0070469 "Non-pneumatic tire" can be referred.

In addition, the "non-pneumatic tire" has a similar maneuverability to pneumatic tires without using air pressure, and prevents foreign matter from being trapped, and includes a structural reinforcement between the web spoke and the tread that touches the ground. It can support the vehicle's load and function like pneumatic pressure in a pneumatic tire, but the space between the web spokes is open, so if foreign matter such as sand or gravel enters the gap, the spoke cracks There is a problem of causing a shortening of tire life.

In addition, the "airless tire" is to allow the structure provided inside the tire to support the load of the vehicle body instead of compressed air, and the stress generated in the structure is expressed by deformation of the outer band, for example, in the radial direction The outer band, which is pulled in the rotational center direction by the spoke, is wrinkled along the circumferential direction. The deformation of the outer band has a problem of providing a cause of deteriorating driving performance such as noise and vibration.

In addition, the "non-pneumatic tire", while having performance similar to that of a pneumatic tire, is capable of supporting a load of a vehicle together with its structural components, and the bearing force of the load applied to the tread is insufficient and transmitted from the road surface. There is a problem that the ride comfort is reduced due to exposure to the pressure and impact.

In addition, the conventional airless tire has been adopted to provide rigidity in the absence of air or durability against a load, but there is a problem in that vibration noise is more noticeable during driving of the vehicle.

In addition, among the airless tires, airless tires with a truss structure and a wheel structure are made to withstand the load of the vehicle, but this also focuses on rigidity, while reducing vibration noise generated by friction with the road surface when driving. There is no problem.

[Patent Document 0001] Registered Patent No. 10-1411103 "Non-pneumatic tire" (announcement 2014.06.27.) [Patent Document 0002] Registered Patent No. 10-1362120 “Airless Tire” (announcement 2014.02.13.) [Patent Document 0003] Patent Publication No. 10-2012-0070469 “Non-pneumatic tire” (published Jun. 29, 2012)

The present invention was invented to solve the above problems, the purpose of which is to maintain the stiffness to support the load of the vehicle, while allowing to distribute the load pressure, but the spokes to offset and suppress vibration noise when the tire rolls We are trying to provide wealth.

Another object of the present invention is to reduce the vibration noise caused by the airless tire by forming a spoke portion that improves the efficiency of reducing vibration noise, thereby enabling quiet driving of the vehicle.

Another object of the present invention is to form a plurality of main core spokes, which have improved the reduction efficiency of vibration noise, so that the dispersion efficiency of vibration noise is improved.

Another object of the present invention, by forming a sub-core of a smaller size than the main core around the main core, to efficiently distribute the load and vibration noise concentrated on the main core.

The present invention for achieving the above technical problem, while maintaining a stiffness while forming a combined hollow so that the tread formed in an annular contact with the road surface and the wheel (not shown) to which the axle is connected can be coupled, the load In the airless tire comprising a side formed to a certain thickness along the inner circumferential surface of the tread so as to support and disperse the load pressure, the side is formed in an annular shape, but is repeatedly formed while dividing the space It is characterized in that the spoke is further formed to form a core for each space to disperse the vibration noise.

In addition, the spoke portion, the inner space formed in the shape of an equilateral trapezoid on the side, and a spoke diagonal bar connected to the side to divide the inner space diagonally, the spoke diagonally divided into a first space formed on the tread side It is characterized in that it comprises a main core to be formed and a sub-core formed in a second space formed on the side of the wheel (not shown), which is divided into the spoke diagonal bar.

In addition, the inner space, the inner round bar formed with a constant curvature to be in close contact with the outer circumferential surface of the wheel (not shown), the outer round bar is formed with a constant curvature to be in close contact with the inner circumferential surface of the tread, another spoke It is characterized in that it is formed of left and right straight bars that are formed to connect both ends of the inner outer round bar so that the part can be formed on the left and right.

In addition, the side is characterized in that it is formed by further forming a coupling hollow in the center where the spokes are formed so that the wheels are installed connected to the axle.

In addition, the main core includes a main ring formed of a constant diameter over the left straight bar, the spoke diagonal bar, and the outer round bar forming the first space; A main bending spoke formed to extend toward the center on the inner circumferential surface of the main ring; It characterized in that it comprises a main center body to form a point by connecting the main bent spokes.

In addition, the sub-core, a right ring bar forming a second space, a spoke diagonal bar, a sub-ring formed with a constant diameter across the inner round bar; A sub-bent spoke formed to extend toward the center on the inner circumferential surface of the sub-ring; It characterized in that it comprises a sub-center body to form a point by connecting the sub-bent spokes.

In addition, the main bent spoke and the sub bent spoke are formed by being bent toward one side so as to disperse the vibration noise, and are formed by arranging a plurality at regular intervals.

According to the airless tire for reducing vibration noise of the present invention, the stiffness is maintained so as to support the load of the vehicle, but the spoke portion can cancel and suppress vibration noise when the tire rolls so as to support the load and distribute the load pressure. It has the effect of making.

In addition, by forming a spoke portion that improves the efficiency of reducing the vibration noise, there is an effect to reduce the vibration noise caused by the airless tire to enable quiet driving of the vehicle.

In addition, by forming a plurality of main core spokes that have improved the reduction efficiency of vibration noise, there is an effect to improve the dispersion efficiency of vibration noise.

In addition, by forming a sub-core of a smaller size than the main core around the main core, there is an effect to efficiently distribute the load and vibration noise concentrated on the main core.

1 is a view showing an airless tire for reducing vibration noise according to the present invention.
Fig. 2 is a view showing a spoke portion enlarged in Fig. 1A.
Fig. 3 is a diagram showing an example of the operation of the spoke portion shown in Fig. 1.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more fully describe the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same members may be indicated by the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the subject matter of the present invention are omitted.

Hereinafter, an airless tire for reducing vibration noise of the present invention will be described in detail by explaining a preferred embodiment of the present invention with reference to the accompanying drawings.

The airless tire 2 for reducing vibration noise according to the present invention, as shown in FIG. 1, is coupled with a tread 4 formed in an annular shape to contact the road surface, and a wheel (not shown) to which an axle is connected. While forming the combined hollow 12 so as to maintain rigidity, the side 14 is formed to have a constant thickness along the inner circumferential surface of the tread 4 to support the load and distribute the load pressure. . In the side 14, the spoke portion 40 is formed in an annular shape, so that the core 46 is formed in each of the inner spaces 42 repeatedly formed while dividing the space to disperse vibration noise. It is done.

The side 14 is formed of a predetermined width and an integral annular rim, and spoke portions 40 of various shapes are formed. The side 14 is preferably formed of an elastic body made of a rubber material having good restoring force.

In addition, the spoke portion 40, as shown in Figure 2, side 14 is formed in an equilateral trapezoidal shape, the inner space 42, and the side 14 to diagonally divide the inner space 42 ) Is formed by connecting the spoke diagonal bar 44, the spoke diagonal bar 44 and the main core 46a formed in the first space 42a formed on the tread 4 side, and the spoke diagonal It comprises a sub-core (46b) is formed in a second space (42b) is formed on the side of the wheel (not shown) is divided into bars (44).

The spoke portion 40 is formed of a structure capable of supporting the load pressure of the vehicle, and is provided with a main core 36a and a sub core 46b so that the reduction efficiency can be improved in further reducing vibration and noise. It is done. And this spoke portion 40 is formed repeatedly over the circumference of the side 14 so that the support of the load pressure and the dispersion of vibration noise is improved.

The inner space 42 has an inner round bar 14a formed at a constant curvature so as to be in close contact with the outer circumferential surface of the wheel (not shown) and a constant curvature so as to be in close contact with the inner circumferential surface of the tread 4. The outer round bar 14b is formed, and the left right straight bar 14c is formed to connect both ends of the inner outer round bars 14a and 14b so that another spoke portion 40 can be formed on the left and right sides. It is formed of (14d). The inner space 42 is formed by forming inner and outer round bars 14a and 14b, left and right straight bars 14c and 14d, and spoke diagonal bars 44 to assist in the dispersion of vibration noise.

The side 14 is formed by further forming a coupling hollow 12 at the center where the spokes 40 are formed so that the wheels connected to the axle can be installed. The above-described coupling hollow 12 can be changed according to the size or shape of the wheel to be installed, and may be formed in various forms.

The main core 46a includes a left straight bar 14c forming the first space 42a, a spoke diagonal bar 44, and a main ring R1 formed with a constant diameter over the outer round bar 14b. )and; A main bending spoke P1 formed to extend toward the center on the inner circumferential surface of the main ring R1; The main bending spokes (P1) are connected to form a main center (C1) to form a point.

The main ring (R1) is affected by the load pressure, but exerts a supporting force together with the surrounding spoke portion (40). Then, the concentrated vibration noise is dissipated and weakened while moving to the main bending spoke P1 formed radially after being transmitted to the main ring R1, and naturally extinguishes after reaching the main center body C1.

The sub-core (46b) is a right ring bar (14d) forming the second space (42b), a spoke diagonal bar (44), and a sub-ring (R2) formed of a constant diameter across the inner round bar (14a) )and; A sub-bent spoke P2 formed to extend toward the center on the inner circumferential surface of the sub-ring R2; The sub-bent spokes (P2) are connected to form a sub-center (C2) to form a point.

The sub-ring (R2) is affected by the load pressure, but assists the supporting force of the main core (46a) with the surrounding spoke portion (40). And the vibration noise transmitted to the sub-ring (R2) is distributed and weakened while moving on the sub-ring (R2) and the sub-bending spoke (P2) radially when the sieve that is not canceled by the main core (46a) is transmitted. After it reaches (C2), it is allowed to disappear naturally.

The main bending spoke P1 and the sub bending spoke P2 are formed to be bent toward one side so as to disperse the vibration noise, and are formed by placing a plurality of them at regular intervals.

Hereinafter, an operation example of the present invention made as described above will be described in detail through the drawings.

First, when the airless tire 2 rolls, as shown in FIG. 3, the portion pressed against the ground under a load pressure causes deformation and vibration noise through friction with the ground. At this time, the main cores 46a of the airless tire 2 in the order of contact with the ground are transmitted while dispersing the vibration noise primarily transmitted as being connected to the surrounding spokes 40. That is, the vibration noise is transmitted from the first space 42a of the inner spaces 42 through the tread 4 and the side 14 to the main core 46a pressed by the load pressure. The vibration noise weakened as it is transmitted and distributed to the main core 46a is lost to the sub-core 46b formed in the second space 42b and then weakened. In addition, vibration noise is transmitted to the main core 46a reaching the surrounding ground and to the main core 46a moving away from the ground, and then transmitted to the sub-cores 46b formed nearby, and then distributed, and then reduced noise. Will achieve That is, when the vibration noise is firstly transmitted to the main core 46a in a partially deformed state, it is distributed and weakened while being transmitted in the order of the main ring R1, the main bending spoke P1, and the main center body C1. The right straight bar 14d of 14 and the spoke diagonal bar 44 are transmitted to the sub-core 46b. Subsequently, even in the sub-core 46b, vibration noise is transmitted in the order of the sub-ring R2, the sub-bending spoke P2, and the sub-center body C2, but is reduced or extinguished while being dispersed and weakened.

On the other hand, if the airless tire 2 is subjected to a load pressure while rolling, the main core 46a in a state close to the ground is deformed to support the load pressure, wherein the main core 46a supports the load pressure. When the sub-core 46b is also slightly deformed and supported, the load pressure disperses the sub-core 46b. That is, the dispersion of the load pressure is the inner ring of the inner ring 42 to form the inner space 42 on the side 14 besides the main ring R1 of the main core 46a, the main bending spoke P1, and the sub-center body C2. It is made by bars 14a and 14b, left and right straight bars 14c and 14d, and spoke diagonal bars 44. The airless tire 2 stably supports the load of the vehicle and improves driving efficiency during rolling of the vehicle and also reduces vibration noise reduction efficiency.

The embodiment of the airless tire for reducing vibration noise of the present invention described above is only exemplary, and a person having ordinary knowledge in the technical field to which the present invention belongs is capable of various modifications and other equivalent embodiments. You will know well. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, it should be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

2: Airless tires 4: Tread
10: spoke wheel part 12: combined hollow
14: side 14a: inner round bar
14b: outer round bar 14c: left straight bar
14d: right straight bar 40: spoke portion
42: inner space 42a: first space
42b: second space 44: spoke diagonal bar
46: core 46a: main core
C1: Main center C2: Sub center
P1: Main bend spoke P2: Sub bend spoke
R1: Main ring R2: Sub ring

Claims (7)

delete A tread 4 formed in an annular shape to contact the road surface;
While forming the combined hollow 12 so that the wheel to which the axle is connected can be combined, retains stiffness, and is formed to a certain thickness along the inner circumferential surface of the tread 4 to support the load and distribute the load pressure. , An inner round bar 14a formed at a constant curvature so as to be formed in an annular shape and repeatedly adhered to the outer circumferential surface of the wheel so as to be repeatedly formed while dividing the space, and a constant curvature so as to adhere to the inner circumferential surface of the tread 4 An outer round bar 14b formed by, and a left right straight bar 14c formed to connect both ends of the inner outer round bars 14a and 14b so that another spoke portion 40 can be formed on the left and right sides ) Spoke part 40 to form a core 46 for each inner space 42 formed by 14d to disperse vibration noise, and a spoke part to install a wheel connected to an axle. In the airless tire for reducing vibration noise comprising a; and a side (14) further formed a coupling hollow (12) at the center of the (40) is formed,
The spoke portion 40,
The inner space 42 formed in an equilateral trapezoidal shape on the side 14,
A spoke diagonal bar 44 formed to be connected to the side 14 to divide the interior space 42 diagonally;
A main core 46a formed in the first space 42a, which is divided into the spoke diagonal bars 44 and formed on the tread 4 side,
Airless tire for reducing vibration noise, characterized in that it comprises a sub-core (46b) formed in the second space (42b) formed on the wheel side is divided by the spoke diagonal bar (44). delete delete According to claim 2,
The main core 46a,
A left straight bar 14c forming the first space 42a, a spoke diagonal bar 44, and a main ring R1 formed with a constant diameter over the outer round bar 14b; A main bending spoke P1 formed to extend toward the center on the inner circumferential surface of the main ring R1; The main bending spokes (P1) are connected to form a main body (C1) to form a point,
The sub-core 46b,
A right straight bar 14d forming a second space 42b, a spoke diagonal bar 44, and a sub ring R2 formed with a constant diameter over the inner round bar 14a; A sub-bent spoke P2 extending toward the center on the inner circumferential surface of the sub-ring R2; An airless tire for reducing vibration noise, characterized in that the sub-bent spokes (P2) comprise a sub-center (C2) that is connected to form a point. delete The method of claim 5,
The main bending spoke (P1) and the sub-bending spoke (P2),
An airless tire for reducing vibration noise, which is formed by being bent toward one side so as to disperse the vibration noise, and is formed by arranging a plurality at regular intervals.

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