TWI751440B - Tire sound-absorbing part - Google Patents

Abstract

A tire sound-absorbing member is provided inside a tire, the tire sound-absorbing member is made of porous material, and has a first side and a second side, the first side faces the inner peripheral surface of the tire, and the first side is facing the inner peripheral surface of the tire. The two sides face away from the inner peripheral surface of the tire; the first side has two protruding ribs and a groove, the two protruding ribs are connected to the inner peripheral surface of the tire, and the groove is located between the two protruding ribs; wherein , viewed from the section of the tire sound-absorbing member, the opening of the groove has an opening width, the tire sound-absorbing member has a maximum width, and the ratio of the opening width to the maximum width is between 20% and 60%. Through the design of the above-mentioned sound-absorbing member, the vibration of the gas in the tire cavity can be absorbed, so as to reduce the noise transmitted from the tire to the outside.

Description

A tire sound-absorbing part

The present invention relates to a tire sound-absorbing member; in particular, it refers to a tire sound-absorbing member which is arranged in a tire and can reduce the noise generated when the tire is rolling.

Tire noise has always been a very troublesome problem. It is known that tire noise is caused not only by the friction between the tire tread and the road surface, but also by the vibration of the filling air in the tire cavity. The cavity resonance sound of the tire cavity is mainly low-frequency noise with audio frequency ranging from 200Hz to 250Hz. In order to provide a more comfortable ride experience for drivers and passengers, in addition to safety, reducing tire noise is the main goal of various tire manufacturers. one of the main goals to pursue.

In view of this, an object of the present invention is to provide a tire sound-absorbing member, which can be installed inside the tire and can reduce the cavity resonance sound generated when the tire is rolling.

In order to achieve the above purpose, the tire sound-absorbing member provided by the present invention is provided in the interior of a tire, the tire sound-absorbing member is made of porous material, and has a first side and a second side, the first side facing the The inner peripheral surface of the tire, the second side faces away from the inner peripheral surface of the tire; the first side has two protruding ribs and a groove, the two protruding ribs are connected to the inner peripheral surface of the tire, and the groove is located at the inner peripheral surface of the tire. Between the two protruding ribs; wherein, viewed from the cross-section of the tire sound-absorbing member, the The opening of the groove has an opening width, the tire sound absorbing member has a maximum width, and the ratio of the opening width to the maximum width is between 20% and 60%.

The effect of the present invention is that, through the structural design of the tire sound-absorbing member, the vibration of the gas in the tire cavity can be absorbed, so as to reduce the noise transmitted from the tire to the outside.

1: Wheel frame

2: tires

2a: Outer peripheral surface

2b: inner peripheral surface

3: Bead lips

4: tires

〔this invention〕

10, 20, 30, 40, 50, 60, 70, 80: tire sound-absorbing parts

10a: First side

10b: Second side

12: Ribs

14, 22, 32, 42, 52, 62, 72: grooves

24, 34, 44, 54: groove walls

74: Groove

W1,W12,W13,W14,W15,Wp: Opening width

W2: maximum width

H1: Maximum height

H2: groove depth

FIG. 1 is a schematic diagram of a tire sound-absorbing member disposed in a tire according to a first embodiment of the present invention.

2 is a cross-sectional view of the tire sound-absorbing member according to the first embodiment of the present invention.

3 is an XY scatter diagram of the decibels and the aperture ratio of the measured noise at a frequency of about 244 when a tire is tested with the tire sound-absorbing member of the present invention, wherein the X-axis is the aperture ratio, and the Y-axis is the noise in decibels.

4 is a cross-sectional view of a tire sound-absorbing member according to a second embodiment of the present invention.

5 is a cross-sectional view of a tire sound-absorbing member according to a third embodiment of the present invention.

6 is a cross-sectional view of a tire sound-absorbing member according to a fourth embodiment of the present invention.

7 is a cross-sectional view of a tire sound-absorbing member according to a fifth embodiment of the present invention.

8 is a cross-sectional view of a tire sound-absorbing member according to a sixth embodiment of the present invention.

9 is a cross-sectional view of a tire sound-absorbing member according to a seventh embodiment of the present invention.

10 is a schematic side cross-sectional view of a plurality of tire sound-absorbing members disposed at intervals on the inner peripheral surface of the tire according to an embodiment of the present invention.

In order to illustrate the present invention more clearly, the following examples are given and detailed descriptions are given in conjunction with the drawings. Referring to FIGS. 1 to 2 , the tire sound-absorbing member 10 according to the first embodiment of the present invention is provided in the inner cavity of a tire 2 . The tire 2 is combined with a wheel frame 1 and has an outer peripheral surface. 2a and an inner peripheral surface 2b, the outer peripheral surface 2a is used to contact the ground, and the inner peripheral surface 2b faces the wheel frame 1 .

The tire sound absorbing member 10 is annular and made of porous material, and has a first side 10a and a second side 10b. When the tire sound absorbing member 10 is fixed on the inner peripheral surface 2b of the tire 2, the The first side 10 a of the tire sound absorbing member 10 faces the inner peripheral surface 2 b of the tire 2 , and the second side 10 b faces away from the inner peripheral surface 2 b of the tire 2 . The first side 10a is formed with two protruding ribs 12 and a groove 14, the two protruding ribs 12 are for connecting with the inner peripheral surface of the tire 2, the groove 14 is located between the two protruding ribs 12, when the tire absorbs sound When the component 10 is installed inside the tire 2 , the opening of the groove 14 faces the inner peripheral surface of the tire 2 . In this embodiment, glue is applied to the top surface of the rib 12 of the tire sound absorbing member 10 to adhere and fix the top surface of the rib 12 of the tire sound absorbing member 10 to the inner peripheral surface 2 b of the tire 2 . Preferably, the tire sound-absorbing member 10 is installed on the inner peripheral surface 2b of the tread portion corresponding to the tire 2, as shown in FIG. 1 .

Please refer to FIG. 2 , which is a cross-sectional view of the tire sound-absorbing member 10 . Viewed from the cross-section of the tire sound-absorbing member 10 , the groove 14 has an opening width W1 , and the tire sound-absorbing member 10 substantially has a maximum width W2 , the ratio of the opening width W1 to the maximum width W2 is between 20% and 60%. Preferably, the ratio is between 20% and 55%. More preferably, the ratio is between 25% and 50%, and in the best case, the ratio is between 30% and 50%. In addition, in some embodiments, the ratio can also be designed to be between 30% and 45%, or between 30% and 40%, but not limited thereto.

Further, preferably, the tire sound-absorbing member 10 satisfies at least one of the following conditions:

(1) The tire sound-absorbing member 10 has a maximum height H1, and the ratio of the maximum height H1 to the maximum width W2 is between 20% and 40%.

(2) The maximum width of the tire sound-absorbing member 10 is between 5 cm and 10 cm, and the maximum height H1 is between 1 cm and 4 cm.

(3) The opening width W1 of the groove 14 of the tire sound absorbing member 10 is between 1.25 cm and 4.5 cm.

(4) The groove 14 of the tire sound absorbing member 10 has a groove depth H2, and the ratio of the groove depth H2 to the maximum height H1 is between 35% and 45%.

(5) The ratio of the groove depth H2 to the opening width W1 of the groove 14 of the tire sound absorbing member 10 is between 30% and 60%.

(6) The density of the tire sound-absorbing member 10 is between 33kg/m ³ to 37kg/m ³ .

For example, the present invention provides an embodiment of the tire sound-absorbing member 10, which is made of foam, such as polyurethane sound-absorbing cotton. Its density is about 35kg/m ³ . The maximum width is 5 cm, the maximum height is 2 cm, the opening width W1 of the groove 14 is 1.5 cm, and the groove depth H2 of the groove 14 is 0.8 cm. The ratio of the opening width W1 to the maximum width W2 is about 30%; the ratio of the maximum height H1 to the maximum width W2 is about 40%; the ratio of the groove depth H2 to the maximum height H1 is about 40%; the groove depth H2 to the opening width W1 The ratio is about 53.3%.

Please cooperate with Fig. 3. Fig. 3 is a tire sound-absorbing member 10 made of CALMFLEX No. F-9M sound-absorbing cotton. The tire sound-absorbing member 10 is installed on the tire 2, and then the tire 2 is driven to roll on the test road. , and measure the XY scatter diagram of the decibel number and the opening ratio of the noise at 244 Hz, wherein the opening ratio refers to the ratio of the opening width W1 of the groove 14 to the maximum width of the tire sound-absorbing member 10. The tire sound-absorbing member 10 The maximum height H1 is 2cm, the maximum width W2 is 5cm, and the groove depth H2 of the groove 14 is 0.8cm. Among them, the gauge of tire 2 tested The grid is 185/60R15, that is, the tire width is 185mm, the aspect ratio of the tire section is 60%, the tire thickness is 111mm, and the drum diameter is 15in.

Please refer to Table 1 and Figure 3 below to see that when the tire is not equipped with sound-absorbing parts, its noise decibel exceeds 48dB. The decibel number is about 47.415dB. When the aperture ratio is increased to 40%, the noise decibel number is reduced to 45.217dB, and when the aperture ratio is increased to 60%, the noise decibel number is reduced to 45.473dB. It can be seen from Figure 3 that when the aperture ratio is between 20% and 60%, the tire sound-absorbing member has a remarkable noise suppression effect.

The test site for the above test is the semi-anechoic chamber of the vehicle research and test center of the consortium legal person. 125Hz, sound insulation characteristic is 65dB(A) (125Hz), background noise is 20dB(A), lower than NC-30 when the air conditioner is turned on; the test machine is HORIBA company model 1-AXLE CHASSIS DYNO machine.

It can be seen that, through the design of the groove 14 of the tire sound absorbing member 10 of the present invention, in particular, the ratio (opening ratio) of the opening width W1 of the groove 14 to the maximum width W2 of the tire sound absorbing member 10 is between 20% and 60%. The design of the space does have the effect of absorbing the gas vibration in the tire cavity to reduce the noise emitted by the tire when rolling.

4, it is a tire sound-absorbing member 20 according to a second embodiment of the present invention. The structure of the tire sound-absorbing member 20 is substantially the same as that of the first embodiment. The difference is that the grooves of the tire sound-absorbing member 20 are The distance between the groove walls 24 on both sides of the 22 is gradually expanded from the opening to the groove bottom direction, and the maximum width of the tire sound-absorbing member 20 is 8cm, the maximum height is 2.4cm, and the opening width W12 of the groove 22 is 2cm, The groove depth of the groove 22 is 0.8 cm. The opening ratio of the tire sound-absorbing member 20 is about 25%; the ratio of the maximum height to the maximum width is about 30%; the ratio of the groove depth to the maximum height is about 33.33%; the ratio of the groove depth to the opening width is about 40%; The density is about 33kg/m ³ .

Please refer to FIG. 5 , which is a tire sound-absorbing member 30 according to a third embodiment of the present invention. The structure of the tire sound-absorbing member 30 is substantially the same as that of the first embodiment. The difference is that the grooves of the tire sound-absorbing member 30 are The distance between the groove walls 34 on both sides of the 32 is gradually reduced from the opening to the groove bottom, and the maximum width of the tire sound-absorbing member 30 is 10cm, the maximum height is 3.5cm, and the opening width W13 of the groove 32 is 4cm, The groove depth of the groove 32 is 1.5 cm. The opening ratio of the tire sound-absorbing member 30 is about 40%; the ratio of the maximum height to the maximum width is about 35%; the ratio of the groove depth to the maximum height is about 42.85%; the ratio of the groove depth to the opening width is about 37.5%; The density is about 36kg/m ³ .

Please refer to FIG. 6 , which is a tire sound-absorbing member 40 according to a fourth embodiment of the present invention. The structure of the tire sound-absorbing member 40 is substantially the same as that of the first embodiment. The difference is that the grooves of the tire sound-absorbing member 40 are The groove wall 44 of 42 is convex, and the tire sound-absorbing member 40 has a maximum width of 6cm and a maximum height of 1.5cm. The opening width W14 of the groove 42 is 1.25cm, and the groove depth of the groove 42 is 0.6cm. The opening ratio of the tire sound-absorbing member 40 is about 20.8%; the ratio of the maximum height to the maximum width is about 25%; the ratio of the groove depth to the maximum height is about 40%; the ratio of the groove depth to the opening width is about 48%; The density is about 34kg/m ³ .

Please refer to FIG. 7 , which is a tire sound-absorbing member 50 according to a fifth embodiment of the present invention. The structure of the tire sound-absorbing member 50 is substantially the same as that of the fourth embodiment. The difference is that the grooves of the tire sound-absorbing member 50 are The groove wall 54 of 52 is in the shape of a concave arc, and the tire sound-absorbing member 50 has a maximum width of 5 cm and a maximum height of 1.5 cm. The opening width W15 of the groove 52 is 1 cm, and the groove depth of the groove 52 is 0.5 cm. The opening ratio of the tire sound-absorbing member 50 is about 20%; the ratio of the maximum height to the maximum width is about 30%; the ratio of the groove depth to the maximum height is about 33%; the ratio of the groove depth to the opening width is about 50%; The density is about 35kg/m ³ .

Please refer to FIG. 8 , which is a tire sound-absorbing member 60 according to a sixth embodiment of the present invention. The structure of the tire sound-absorbing member 60 is substantially the same as that of the first embodiment. In particular, the tire sound-absorbing member 60 has a plurality of grooves arranged at intervals. 62. The opening widths of the grooves 62 can be designed to be the same or different. In this embodiment, the opening widths of the grooves 62 are all Wp, and when calculating the opening ratio of the tire sound-absorbing member 60, each The sum of the summed opening widths Wp of the grooves 62 is divided by the maximum width of the tire sound absorbing member 60 to calculate.

Please refer to FIG. 9 , which is a tire sound-absorbing member 70 according to a seventh embodiment of the present invention. Its structure is substantially the same as that of the first embodiment. In particular, the groove bottom of the groove 72 of the tire sound-absorbing member 70 is formed There are multiple grooves 74 . In addition, in one embodiment, the groove bottom of the groove 72 can also be designed to have a plurality of protruding rib structures formed thereon.

In addition, as shown in FIG. 10 , in one embodiment, a plurality of tire sound-absorbing members 80 may also be provided in the tire 4 , and these tire sound-absorbing members 80 may be, but not limited to, the above-mentioned first to seventh embodiments. One of the tire sound-absorbing members, in particular, the tire sound-absorbing members 80 are arranged on the inner peripheral surface of the tire 4 at equal intervals, especially the inner peripheral surface corresponding to the tread portion of the tire 4 .

The above description is only a preferred embodiment of the present invention. The tire sound-absorbing member provided by the present invention can be applied to tires of various specifications and sizes. Any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the within the scope of the patent of the present invention.

1: Wheel frame

2: tires

2a: Outer peripheral surface

2b: inner peripheral surface

3: Bead lips

10: Tire sound-absorbing parts

Claims (5)

A tire sound-absorbing member, which is provided inside a tire, is characterized in that: the tire sound-absorbing member is made of porous material, and has a first side and a second side, and the first side faces the inner circumference of the tire The second side faces away from the inner peripheral surface of the tire; the first side has two protruding ribs and a groove, the two protruding ribs are connected to the inner peripheral surface of the tire, and the groove is located on the two protruding ribs. Wherein, viewed from the section of the tire sound-absorbing member, the opening of the groove has an opening width, the tire sound-absorbing member has a maximum width, and the ratio of the opening width to the maximum width is between 20% and 60%. %; wherein, the tire sound-absorbing member has a maximum height, and the ratio of the maximum height to the maximum width is between 25% and 40%; wherein, the groove has a groove depth, and the groove depth and the maximum width are between 25% and 40%; The ratio of height is between 35% and 45%; wherein, the maximum width is between 5cm and 8cm; and the maximum height is between 1cm and 2.4cm. The tire sound-absorbing member according to claim 1, wherein the width of the opening is between 1.25cm and 4.5cm. The tire sound-absorbing member of claim 1, wherein the ratio of the groove depth to the opening width is between 30% and 60%. The tire sound-absorbing member according to claim 1, wherein the density of the tire sound-absorbing member is between 33kg/m ³ and 37kg/m ³ . The tire sound-absorbing member according to claim 1, wherein the material of the tire sound-absorbing member is selected from polyurethane.

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