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Pneumatic tire

A technology for pneumatic tires and sidewalls, applied to tire parts, tire edges, transportation and packaging, etc., can solve the risk of increasing the separation of curtain yarn and rubber material, increase the fluidity of rubber material in the bead part, and increase the rigidity of the sidewall part Insufficient and other problems, to achieve the effect of reducing the risk of separation, reducing damage, and improving rigidity

Active Publication Date: 2017-10-13
CHENG SHIN RUBBER CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned prior art, the bead filler (3) combined with the carcass ply (4), due to its high height, increases both the cord and the tire when the tire runs at a high speed under a certain load condition. risk of compound separation
At the same time, excessively high bead filler (3) may lead to bad riding comfort; it also increases the fluidity of the rubber compound in the bead part (1) when the raw tire is vulcanized, thus causing problems such as poor tire uniformity
If the height of the bead filler (3) is simply reduced, the sidewall (5) may not be rigid enough to support the carcass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The structure of the pneumatic tire provided by this embodiment is as follows: Figure 2~3 As shown, the tire comprises two bead portions 1, two bead cores 2, two sidewalls 5, a crown and two carcass plies 4; said carcass plies pass from the bead portions through the sidewalls Extending to the crown; each bead portion 1 has a bead filler 3; each sidewall portion 1 is provided with a bead protective rubber 7 axially outward;

[0059] A first reinforcing rubber sheet 6 is arranged between the carcass ply 4 and the bead filler 3 in the axial direction. The radial upper end a extends downward along the middle of the two layers of ply, reaches the radial top b of the bead filler, and extends from the inner side of the bead filler axially to the lower side, bypassing the lower edge c of the bead core, Then wrap up until the lower end d; the distance H1 between the radial upper end a of the first reinforcing film 6 and W1 is 10 mm; the radial height of the bead filler 3 on th...

Embodiment 2

[0065]The present invention selects the pneumatic tire described in Example 1 of the 175 / 70R14C specification, and carries out the indoor durability running test. With embodiment 1 tire (choose 5 tires) and comparative tire (choose 2, its size, composition are all identical with embodiment 1, structure such as figure 1 Shown) are respectively installed on the same standard rim, filled with a pressure of 375kPa and a load of 518kg, driven by the tire test drum to rotate at a speed of 81 km / h at an ambient temperature of 38°C, and the load is increased to the load of the ETRTO 2017 regulation Stabilize after 160%, stop running until the tire is damaged, and record the mileage of the tire.

[0066] The test results are shown in Table 1, and the test results are represented by an index, the index takes the comparative tire 1 as a reference value of 100, and the larger the index, the better the result. It can be seen from Table 1 that the tires of the embodiments of the present in...

Embodiment 3

[0071] The structure of the pneumatic tire provided by this embodiment is as follows: Figure 2~3 As shown, the tire comprises two bead portions 1, two bead cores 2, two sidewalls 5, a crown and two carcass plies 4; said carcass plies pass from the bead portions through the sidewalls Extending to the crown; each bead portion 1 has a bead filler 3; each sidewall portion 1 is provided with a bead protective rubber 7 axially outward;

[0072] A first reinforcing rubber sheet 6 is arranged between the carcass ply 4 and the bead filler 3 in the axial direction. The radial upper end a extends downward along the middle of the two layers of ply, reaches the radial top b of the bead filler, and extends from the inner side of the bead filler axially to the lower side, bypassing the lower edge c of the bead core, Then wrap up until the lower end d; the distance H1 between the radially upper end a of the first reinforcing film 6 and W1 is 12mm; the radial distance of the bead filler 3 at...

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Abstract

The invention provides a pneumatic tire. The pneumatic tire comprises a bead part, a bead core, sidewall, a crown and two carcass plies, wherein the bead part is provided with bead filler; a first reinforcement rubber sheet is arranged between the carcass plies and the bead filler in an axial direction; the first reinforcement rubber sheet extends down along the middle of the two carcass plies from a radial upper end part between the overlapped two carcass plies in a radial direction to the radial top of the bead filler, and extends to the lower side from the axial direction interior of the bead filler, bypasses the lower edge of the bead core, and further wraps up to a lower end part; the distance between the radial upper end part of the first reinforcement rubber sheet and a breaking wide end point is in a range of 10 to 25mm; the bead filler fills from the radial upper side of a radial highest point at the upper edge of the bead core to the radial top, and the vertical distance between the radial top and a bead wire is in a range of -10 to +5mm. The invention provides a commercial vehicle tire, which has the advantages of excellent mileage, strong wear resistance and high loading capacity.

Description

technical field [0001] The present invention relates to the technical field of tires, in particular to a pneumatic tire, and more particularly to a commercial vehicle tire with excellent mileage, toughness, wear resistance and high load capacity. Background technique [0002] Tires are mainly ground-rolling annular elastic rubber products assembled on various vehicles. Most modern cars use pneumatic tires; Among them, the crown is the main part of the tire running in contact with the ground, and it is the entire part between the two shoulders; the crown includes the tread, the buffer layer or the belt layer, and the ply (the entire inner ply) that are in direct contact with the road surface. known as carcass) and so on. The bead is the part that is in direct contact with the rim, which attaches the tire to the rim and covers the cord at the interface; the bead is composed of bead wire, bead core, chafer and other parts. The shoulder is located between the tread and the sid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/06B60C15/00
CPCB60C15/0009B60C15/0603B60C15/0628B60C2015/0639Y02T10/86
Inventor 罗才仁
Owner CHENG SHIN RUBBER CHINA
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