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Assembly of pneumatic tire and rim, and a noise damper used therein

A technology for pneumatic tires and noise reducers, applied in tire parts, vehicle parts, transportation and packaging, etc., can solve the problems of wetting the sponge, difficult to dry the sponge immediately, and tire vibration.

Active Publication Date: 2006-05-24
SUMITOMO RUBBER IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the end of the tire lever (f) to come into contact with the noise absorber (b) (eg Figure 22 Inconvenience shown by the dotted line in ), thereby damaging the noise absorber (b) or causing the noise absorber (b) to separate from the tire (d)
[0005] On the other hand, since the noise absorber (b) made of sponge has high water absorption, there arises a disadvantage that the sponge may be wetted by rain or the like during tire storage or tire and rim assembly.
If the tire and rim are assembled in a state where water has been absorbed, there will be a problem that the absorbed water adversely affects the weight balance to cause the tire to vibrate, or the water penetrates into the tire rubber to cause internal damage.
Thus, in the case of tire and rim assembly, sufficient water removal is required, but the already wet sponge is difficult to dry immediately, which makes its operation very troublesome

Method used

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  • Assembly of pneumatic tire and rim, and a noise damper used therein
  • Assembly of pneumatic tire and rim, and a noise damper used therein
  • Assembly of pneumatic tire and rim, and a noise damper used therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0140] Using the noise absorber of the first embodiment with the parameters shown in Table 1, not only the assembly of the pneumatic tire (235 / 45ZR17) and the rim (17×7.5JJ) was trial-manufactured, but also the noise performance and the noise performance when the tire was removed Noise reducer damage. Pneumatic tires are vulcanized molded without applying a mold release agent to the inner surface of the tire. The bladder used to mold the inner surface of the tire has no vent grooves on the surface. Thus, the inner surface of the tire is polished to a smooth flat surface and has good adhesion to the noise absorber.

[0141] The noise absorber is made of an ether-based polyurethane sponge (manufactured by Marusuzu K.K., product number E16) with a specific gravity of 0.016, and its total length is 185 cm and as figure 2 It is shown that there are tapered portions cut at an angle of 45 degrees at both circumferential ends of the tire. In this embodiment, the overall volume (V)...

Embodiment B

[0153] Using the noise absorber of the second embodiment with the parameters shown in Table 2, not only a pneumatic tire and rim assembly was trial-produced, but also a test similar to that in Example A was carried out. Parameters such as the cross-sectional shape of the noise absorber are shown in Table 2 and Figures 20(A) to 20(F) middle.

[0154] The manufacturing cost for the noise reducer is represented by an index of 100 relative to Comparative Example B2, wherein the smaller the value, the better.

[0155] It should be noted that the manufacturing method of the noise reducer in Comparative Examples B2 and B3 is the same method as that used for the manufacturing method of the noise reducer in Comparative Examples A2 and A3.

[0156] Comparative Example B1

[0157] A brief description of the test results is given below.

Embodiment A1 to A6

[0162]

[0163] The noise damper exhibits excellent noise immunity and at the same time inhibits damage when changing tires. Also, the noise reducer is suitable for mass production and can suppress the generation of waste materials so that the production cost can be reduced.

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PUM

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Abstract

A pneumatic tire and rim assembly comprising a band-shaped noise damper having a bottom surface fixed to the inner surface of the tire or the inner surface of the rim and a top surface facing the inner space of the tire, and in the inner space of the tire Extends around the tire. The noise absorber is made of a sponge whose volume is in the range of 0.4% to 20% of the overall volume of the tire inner space. In the radial section of the tire, the noise absorber has a horizontally long and flat cross-sectional shape, its maximum thickness from the bottom surface to the top surface is in the range of 5 to 45mm, and the width of the bottom surface is greater than the maximum thickness value. The top surface extends along a wavy curve obtained by repeating the wavy unit in the width direction, the wavy curve including a hilltop with a maximum thickness value, a valley bottom with a minimum thickness value on both sides of the hilltop, and extending downward from the hilltop to the valley bottom The slope of the department. An end portion in the width direction of the top surface terminates in a valley bottom or a slope portion, and the thickness from the top surface to the bottom surface is in a range of 1.0 to 15.0 mm.

Description

technical field [0001] The present invention relates to an assembly of a pneumatic tire and a rim, which has a belt-shaped noise absorber made of sponge body located in the inner space of the tire, and also relates to the noise absorber used in the assembly. Background technique [0002] One of the known tire noises is road noise generated in the frequency range of about 50 to about 400 Hz, and resonant vibration of air (cavity resonance) generated in the tire interior space is the main factor. In order to reduce this road noise, the applicant has proposed a tire assembly (c) having a band-shaped noise damper made of sponge and extending in the circumferential direction in the inner space (a) of the tire (b) (such as in Figure 22 out); and rims (for example, see JP-A No. 2003-252003). The noise absorber (b) converts the vibration energy of the air in the tire inner space (a) into heat energy, so that cavity resonance in the tire inner space (a) can be effectively suppresse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C19/00
CPCB60C19/002
Inventor 汤川直树佐佐木裕司板仓敦彦
Owner SUMITOMO RUBBER IND LTD
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