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Low-flatness-ratio motorcycle pneumatic tire

A technology of pneumatic tires and aspect ratio, which is applied to the reinforcement layer, tire parts, tire sidewalls and other directions of pneumatic tires, which can solve the problems of heavy motorcycle driving, affecting tire durability, and heavy weight.

Pending Publication Date: 2020-12-22
CHENG SHIN RUBBER XIAMEN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of roads and streets, more and more people pursue the fun of driving two-wheeled motorcycles, especially dual-purpose motorcycles for street running, because of their cool models and strong sense of riding speed, they have gradually Entering people's lives, due to the low center of gravity of low-profile motorcycle tires and good high-speed driving stability, most of the existing street and running dual-purpose motorcycles are equipped with low-profile bias tires (such as figure 1 shown), but bias tires with low aspect ratios tend to accumulate thick rubber at the shoulder 10 and the upper half of the bead 11 due to the structure and profile, especially when assembled on the rear wheel of a motorcycle. When the tire is under load and running at high speed, because the rubber material thickness of the tire shoulder 10 and the upper half of the bead 11 is too thick, the weight is heavy, and the heat dissipation is poor, it is easy to cause the deflection point of the bead to move down to the upper part of the carcass roll 13 (such as figure 1 As shown by the arrows), resulting in friction and shearing between the carcass layers 14, which affects the durability of the tire, and too much rubber is accumulated on the side of the tire. Poor performance and handling
In addition, due to the position of the deflection point moving downward and the height of the bead is relatively short, it is easy to cause the bead to collide with the rim flange when it flexes, which further affects the durability of the tire.

Method used

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  • Low-flatness-ratio motorcycle pneumatic tire
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  • Low-flatness-ratio motorcycle pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 2 As shown, the low aspect ratio motorcycle pneumatic tire 2 of the present invention includes a tread portion 20, a carcass portion 30, an inner portion 40, a sidewall portion 50 and a bead portion 60, and the carcass ply of the carcass portion 30 goes around the tire. The roll upper part 31 is formed from the ring portion 60 to the sidewall portion 50; the aspect ratio of the low-profile motorcycle pneumatic tire 2 (tire section height H / tyre section width WX100%) is 70% or less, and the sidewall portion 50 is divided into upper tire There are two parts, the side part 51 and the lower side part 52, in which the upper side part 51 is equipped with a rubber material with high fatigue resistance, and a concave part 53 is set, and a concave part is set between the end A of the roll upper part 31 and the shoulder TE. Into the part 53, so that the flexion position is concentrated on the concave part 53 of the upper sidewall part 51, and the design of the con...

Embodiment 2

[0024] Such as image 3 , 4 , 5, the carcass structure of this embodiment is consistent with that of Embodiment 1, and will not be repeated here. Further, in order to reduce the heat generated by flexing deformation, the concave portion 53 is provided with 3 to 5 concave The raised pattern 55 on the bottom surface 54 of the entry portion 53 is preferably a rib pattern. The raised rib pattern 55 is evenly spaced in the radial direction of the tire and is parallel to each other and extends along the circumferential direction to form a complete circle. The entire circle can also be equally spaced. Distribution, the raised ribs 55 can be compressed with the flexion of the concave part 53 when the tire is running under load, so that the air can be discharged along the gaps between the raised ribs 55, and the tire can be taken away The heat further improves the durability of the tire.

[0025] Preferably, the height W3 of the raised ribs 55 is 1 mm to 5 mm. If the height W3 of the...

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Abstract

The invention discloses a low-flatness-ratio motorcycle pneumatic tire. The low-flatness-ratio motorcycle pneumatic tire comprises a tread portion, a carcass portion, an inner face portion, a sidewallportion and a bead portion, and a carcass cord yarn layer of the carcass portion bypasses the bead portion to the sidewall portion to form a roll upper portion. The motorcycle pneumatic tire has a flatness ratio of 70% or less, the sidewall portion is divided into an upper sidewall portion and a lower sidewall portion, the upper sidewall portion is provided with a highly fatigue-resistant rubbermaterial and a recessed portion, the recessed portion is located between the tail end of the roll upper portion and a shoulder portion, so that a flexing position is concentrated at the recessed portion of the upper sidewall portion, excessive rubber materials on the upper sidewall portion are removed, so that the motorcycle is relatively light in running, and the comfort and the controllability of the tire are improved. Besides, the rubber material with high supporting performance is arranged on the lower sidewall portion, the rubber material hardness of the upper sidewall portion of the sidewall portion is lower than that of the lower sidewall portion, when the tire is loaded and runs at a high speed, certain buffer performance is achieved, the lower sidewall portion is prevented from colliding and interfering with the edge of a rim and damaging the carcass during flexing, and the durability of the tire is effectively improved.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to a pneumatic tire for motorcycles with a low aspect ratio. Background technique [0002] With the continuous improvement of roads and streets, more and more people are pursuing the fun of driving two-wheeled motorcycles, especially street-running dual-purpose motorcycles, because of their cool models and strong sense of riding speed, they have gradually Entering people's life, due to the low center of gravity of motorcycle tires with low aspect ratio and good high-speed driving stability, most of the existing street running dual-purpose motorcycles are equipped with bias tires with low aspect ratio (such as figure 1 shown), but bias tires with low aspect ratios tend to accumulate thick rubber at the shoulder 10 and the upper half of the bead 11 due to the structure and profile, especially when assembled on the rear wheel of a motorcycle. When the tire is under load and running at h...

Claims

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Application Information

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IPC IPC(8): B60C13/00B60C13/02B60C9/02
CPCB60C13/00B60C13/02B60C9/02B60C2013/006
Inventor 苏明柳洪瀚霖
Owner CHENG SHIN RUBBER XIAMEN IND