CN108437704A

CN108437704A - The low rolling of all steel hinders tire

Info

Publication number: CN108437704A
Application number: CN201810216338.9A
Authority: CN
Inventors: 王敏
Original assignee: Anhui Giti Radial Tire Co Ltd
Current assignee: Anhui Giti Radial Tire Co Ltd
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2018-08-24
Anticipated expiration: 2038-03-15
Also published as: CN108437704B

Abstract

A kind of low rolling of all steel of present invention offer hinders tire, including tyre surface, carcass, belt, and tyre surface outer profile and carcass Internal periphery, the tyre surface upper edge tire circumferentially offers four circumferential major troughs, tire is in turn divided into inside shoulder block by the circumferential major trough by outside to inside, central block is leaned in inside, intermediate mass, outside the distance between carcass W, carcass Internal periphery height H, trunnion axis height H at central block and peripheral shoulder block, tyre section width₁, there is 0.75≤H/W≤0.80,0.50≤H between angle a between the second belt and the tangent line and circumferential line of carcass vertical line₁The relationship of/H≤0.60,55 °≤a≤70 °.The present invention is in the case where promoting wear hardness, by improving tread contour, tyre surface outer profile and carcass Internal periphery shape, reaches and improves tread rigidity, improves ground connection situation, realization tire wear is uniform, rolling resistance reduces.

Description

The low rolling of all steel hinders tire

Technical field

The present invention relates to tyre technologies, and in particular to a kind of to realize the abrasion pneumatic tire that uniformly low rolling hinders.

Background technology

Because of the implementation of new national standard GB1589-2016, truck load reduction in the market, due to environmental protection and vehicular emission standards Formulation, also require the low rolling of tire is resistive can reduce the consumption of fuel oil.To improve cargo dead-weight and fuel economy, each kilocalorie Vehicle manufactures commercial city improves work in the lightweight and fuel economy for carrying out vehicle, and then requires lightweight and the low rolling resistance of tire Performance.Low rolling resistance, abrasion performance and anti-slippery three big performance are tire " devil's triangles ", in the case where promoting abrasion, are reduced Rolling resistance, is technically masty problem.

The prior art is general to realize that reducing rolling hinders using shallow decorative pattern ditch depth or adjustment tyre surface formula is subtracted, and subtracts shallow ridges depth, right The decorative pattern wear volume answered can reduce, and adjust tyre surface formula, may result in tread contour not cut resistant.

Invention content

A kind of low rolling of all steel of present invention offer hinders tire, and passing through improves tread contour, tyre surface outer profile and carcass Internal periphery It realizes that abrasion are uniform, reduce rolling resistance.

In order to solve the above technical problems, the present invention adopts the following technical scheme that：

A kind of low rolling of all steel hinders tire, including tyre surface, carcass, belt and tyre surface outer profile and carcass Internal periphery, institute It states tyre surface upper edge tire and circumferentially offers four circumferential major troughs, which is in turn divided into tire by outside to inside interior Side shoulder blocks, inside are by central block, intermediate mass, outside between carcass at central block and peripheral shoulder block, tyre section width Distance W, carcass Internal periphery height H, trunnion axis height H₁, between the second belt and the tangent line and circumferential line of carcass vertical line Angle a between have 0.75≤H/W≤0.80,0.50≤H₁The relationship of/H≤0.60,55 °≤a≤70 °.

Further, the tyre surface outer profile on the section of tyre equatorial, from equatorial plane and tire tread contour The section start of intersection point to shoulder portion is divided into first segment hat arc and second segment hat arc successively, which is preced with arc and second segment is preced with arc phase It cuts, and the radius R of first segment hat arc₁, first segment hat arc arc length L₁, second segment hat arc radius R₂, second segment hat arc arc length L2 has 1.3≤R₁/R₂≤ 2 and 1/3≤L₁/L₂≤ 3 relationship.

Further, the width A of the inside shoulder block and peripheral shoulder block, the inside are in central block and outside are leaned on The width C of the width B, the intermediate mass that entreat block have A:B:C=(1.3 ± 5%):(1 ± 5%):The relationship of (1 ± 5%).

Preferably, the circumferential major trough uses internal curved structure and furrow bank is varied angle shape.

Preferably, the inside offers and tire peripheral, oblique by central block, intermediate mass and outside in central block It arranges, the tiny groove of S-shaped distribution.

By above technical scheme it is found that the present invention is in the case where promoting wear hardness, by improving tread contour, tyre surface Outer profile and carcass Internal periphery shape reach and improve tread rigidity, improve ground connection situation, realize that tire wear is uniform, roll resistance drop It is low.

Description of the drawings

Fig. 1 is the inside and outside contour schematic shapes of tire of the present invention；

Fig. 2 a and 2b are respectively the schematic diagram of good tire ground connection shape and undesirable tire ground connection shape；

Fig. 3 is growth polar plot of the carcass inflation from 10%P → 100%P；

Fig. 4 is the groove bottom schematic diagram of tire circumferential major trough；

Fig. 5 is distribution schematic diagram of the tiny groove on pattern block.

Specific implementation mode

A kind of preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the low rolling resistance tire of all steel includes tyre surface 10, carcass 20 and tyre surface outer profile and carcass Internal periphery, Wherein be provided with belt between tyre surface and carcass, quadriply belt beam layer structure used in the present embodiment, wherein the second belt with Angle between the tangent line and circumferential line of carcass vertical line is a.

10 upper edge tire circumferential direction of the tyre surface opens up four circumferential major troughs, and the circumferential major trough is by tire by outside to interior Side is in turn divided into inside shoulder block, central block and peripheral shoulder block are leaned in inside by central block, intermediate mass, outside.On the inside of tire Refer to close to the side of carriage frame, tire outside is the opposite side on the inside of tire.

The circumferential major trough uses straight flute, and straight flute is identical as tire running direction, and surface is straight during tire running Groove is smaller than tortuous groove resistance, is conducive to reduce rolling resistance.

The circumferential major trough 11 uses internal curved structure and furrow bank is varied angle shape, similar jewel shape furrow bank design (groove bottom pattern is as shown in Figure 4), the design of jewel shape furrow bank had not only enhanced the rigidity between each pattern block but also can guarantee Hai Lu ratios are evenly distributed, uniform to reduce rolling resistance and abrasion.The inside is by central block, intermediate mass and outside in central block The tiny groove arranged with tire peripheral, oblique is offered, with reference to Fig. 5, the whole tendency of the tiny groove is S-shaped, bending The dispersible stress of tiny groove, the earth-grasping force for improving tread contour.

In order to reduce rolling resistance, central block and outside are leaned in the inside shoulder block and the width A of peripheral shoulder block, the inside There is A by the width B of central block, the width C of the intermediate mass:B:C=(1.3 ± 5%):(1 ± 5%):The pass of (1 ± 5%) System, referring to Fig.1.

If shoulder block is wide, central block width narrows, and causes decorative pattern middle part rigidity less than normal, shoulder is rigidly bigger than normal, and central block is rigid Property than shoulder block rigidity to rolling resistance influence bigger, so shoulder block it is wide be unfavorable for reduce rolling resistance；If shoulder block is narrow, it is unfavorable for tire Lateral force resisting in traveling；Inner side and outer side is wide wide close with intermediate mass by central block, is conducive to middle part pattern block stiffness distribution Uniformly；In the block than in range, decorative pattern sea land is bigger, can reducing tire rolling resistance, (Hai Lu ratios are bigger, tread block Rigidity is also bigger, and rolling resistance is also lower), and pattern block wear volume can be increased (Hai Lu ratios are bigger, and wear volume is bigger).

As shown in Figure 1, the tyre surface outer profile on the section of tyre equatorial, from equatorial plane and tire tread contour The section start of intersection point to shoulder portion is divided into first segment hat arc and second segment hat arc successively, and arcs are tangent and first segment for described two sections of hats It is preced with the radius R of arc₁, first segment hat arc arc length L₁, second segment hat arc radius R₂, second segment hat arc arc length L2 have 1.3≤ R₁/R₂≤ 2 and 1/3≤L₁/L₂≤ 3 relationship.Tyre surface, which is preced with arc radius and arc length, can influence tyre surface hat arc-height, to influence tire Internal profile tendency, influences to be grounded, rolls resistive energy.

Crown part within the above range is seamlessly transitted to shoulder portion, and tire is grounded shape (such as Fig. 2 a) and rectangle is presented, and connects Crustal stress is evenly distributed, and the horizontal and vertical deformation in tire running becomes smaller, and it is uniform to be conducive to abrasion.It will appear outside the range Oval ground connection shape, tyre shoulders material easy to wear shown in Fig. 2 b.

The carcass Internal periphery can influence tire property indices, influence the factor master of the carcass Internal periphery tendency There is high (the tire Internal periphery of the distance between carcass at section wide (the distance between tire section outermost), carcass Internal periphery The half of the difference of diameter and rim diameter), trunnion axis high (half of the difference of section width position diameter and rim diameter), at tire shoulder Circular shape, the distance between wide place's carcass of section W, carcass Internal periphery height H, trunnion axis height H₁, the second banding There is 0.75≤H/W between layer and tetra- parameters (as shown in Figure 1) of angle a between the tangent line and circumferential line of carcass vertical line ≤0.80、0.50≤H₁The relationship of/H≤0.60,55 °≤a≤70 °.

In the range：1. carcass is inflated under from 10% air pressure to 100% air pressure stablizes (as shown in Figure 3)；2. being grounded Shape is uniform, ensures that abrasion are uniform when tire rolls；3. angle becomes larger, rolling resistance coefficient reduction (when angle is 64 °, utilizes FEA Rolling resistance coefficient is 6.58N/KN when tool analysis a certain profile, and when angle increases by 2 °, 3%) rolling resistance coefficient reduces.

W、H、H₁The main flat ratio for influencing tire, the flat ratio of tire is higher, and rigidity is lower, and tire easily sinks, rolling resistance It can rise；If flat ratio over-low tire stress easily concentrates on tyre bead portion, tyre bead performance can reduce.

Angle a mainly influences circular shape at tire shoulder, and angle is less than above range, and shoulder thickness is thicker, is unfavorable for tire shoulder Heat dissipation, rolling resistance can rise；Angle is more than above range, it may appear that ground connection shape defect.

By above technical scheme it is found that the present invention passes through the block ratio between rationally designing pattern block, groove shape；Adjust tyre surface Contour shape, it is ensured that tyre surface outer profile crown part to shoulder portion seamlessly transits；Optimize carcass Internal periphery three technology points of tendency Come ensure tire ground connection uniformly, rigidity promoted to promoted abrasion, reduce rolling resistance and it is anti-slippery.

Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.

Claims

1. a kind of low rolling of all steel hinders tire, including tyre surface, carcass, belt and tyre surface outer profile and carcass Internal periphery, described Tyre surface upper edge tire circumferentially offers four circumferential major troughs, which is in turn divided into inside by tire by outside to inside Central block and peripheral shoulder block are leaned in shoulder blocks, inside by central block, intermediate mass, outside, which is characterized in that tire at tyre section width The distance between body W, carcass Internal periphery height H, trunnion axis height H₁, the second belt and carcass vertical line tangent line and tyre surface in There is 0.75≤H/W≤0.80,0.50≤H between angle a between heart line₁The relationship of/H≤0.60,55 °≤a≤70 °.

2. the low rolling of all steel according to claim 1 hinders tire, which is characterized in that the tyre surface outer profile is in tyre equatorial Section on, the section start from the intersection point of equatorial plane and tire tread contour to shoulder portion be divided into successively first segment hat arc and second Section hat arc, which is preced with arc and second segment hat arc is tangent, and the radius R of first segment hat arc₁, first segment hat arc arc length L₁, The radius R of two sections of hat arcs₂, second segment hat arc arc length L2 have 1.3≤R₁/R₂≤ 2 and 1/3≤L₁/L₂≤ 3 relationship.

3. the low rolling of all steel according to claim 1 or 2 hinders tire, which is characterized in that the inside shoulder block and outside shoulder The width A of portion's block, the inside have A by central block and outside by the width B of central block, the width C of the intermediate mass:B:C =(1.3 ± 5%):(1 ± 5%):The relationship of (1 ± 5%).

4. the low rolling of all steel according to claim 1 or 2 hinders tire, which is characterized in that the circumferential major trough is using internal bent Folded structure and furrow bank are varied angle shape.

5. the low rolling of all steel according to claim 4 hinders tire, which is characterized in that the inside by central block, intermediate mass and Outside offers the tiny groove with tire peripheral, oblique arrangement, S-shaped distribution in central block.