CN201371710Y - All-steel radial tire with zero-degree belted layer - Google Patents

Abstract

The utility model relates to a technology for designing the structure of an all-steel radial tire, in particular to the structural adjustment of a zero-degree belted layer of the all-steel radial tire. The all-steel radial tire with the zero-degree belted layer structure comprises a tire surface part, a tire side part, a tire ring part and a cord fabric layer. A 1<#> belted layer, a 2<#> belted layer and the zero-degree belted layer are sequentially arranged outside the cord fabric layer, wherein the zero-degree belted layer is wider than the 1<#> belted layer and the difference between the 1<#> belted layer and the zero-degree belted layer is at least 3 mm. The all-steel radial tire breaks the constraint of the design idea of Pirelli SpA which is the originator of the western structural design of zero-degree belted layers, and provides an improved zero-degree belted layer structure, namely, the zero-degree belted layer is wider than the 1<#> belted layer. Due to the increased difference of the belted layers, stress is reasonably dispersed, and especially interlayer shear stress at ends of the 1<#> and the 2<#> belted layers, as well as strain energy in end areas of the belted layers, are reduced; therefore, the wearability of the tire is greatly improved, and the shoulder vacancy defect of the tire is reduced.

Description

All-steel radial tyre with 0 degree belt structure

Technical field

The utility model relates to the structure-design technique of all-steel radial tyre, relates in particular to all-steel radial tyre 0 degree belt structure adjustment.

Background technology

Update along with the tire industrial technology, all-steel radial tyre has become tire industry main product, all-steel radial tyre in use subject matter is shoulder sky and tyre bead problem, be commonly referred to " two end points " problem, be global difficult point problem, having become both at home and abroad, each giant tyre enterprise endeavours to solve the sign of showing its technical advance.For example, give birth to heat to improve the empty defect of shoulder be exactly one of measure by reducing tyre surface, yet, reduce tyre surface and give birth to heat and often cause the tire wear performance to descend, sacrifice tire service life.

As shown in Figure 1,0 degree belt structure design is extensively adopted by domestic and international many tire enterprise as a kind of main structure-design technique of all-steel radial tyre, particularly domestic tire enterprise adopts this kind structure more than 90%, 0 degree belt structure significant characteristics are differential≤2mm that 1# bracing ply and 0 is spent bracing ply, are applied for a patent by Italian Pirelli company in the eighties in last century.

Summary of the invention

In order to solve above-mentioned technical matters, the purpose of this utility model is that a kind of all-steel radial tyre with 0 degree belt structure will be provided, and is not influencing on other performance basis of tire, significantly reduces the empty defect of shoulder, improves tyre last and service life.

In order to realize above-mentioned purpose, the utility model has adopted following technical scheme:

All-steel radial tyre with 0 degree belt structure, this tire comprises table top portion, sidewall portion, bead part and carcass plies, the outside of carcass plies is followed successively by 1# bracing ply, 2# bracing ply and 0 degree bracing ply, wherein: 0 degree bracing ply is wider than the 1# bracing ply, the differential 3mm that is at least of 1# bracing ply and 0 degree bracing ply.As preferably, above-mentioned 1# bracing ply and 0 degree the differential of bracing ply are 4～10mm.

As preferably, above-mentioned 2# bracing ply is wider than 0 degree bracing ply.As preferred again, above-mentioned 2# bracing ply and 0 degree the differential of bracing ply is 9～11mm.

The utility model has broken through the constraint of west 0 degree belt structure design founder Pirelli company design concept, a kind of improved 0 degree belt structure is provided, promptly 0 degree bracing ply is wider than the 1# bracing ply, owing to strengthened the differential of bracing ply, make stress obtain rational dispersion, particularly reduce the strain energy in 1# bracing ply and 2# belt ends inter-laminar shears stress and belt ends zone, significantly promoted tyre last, reduced the empty defect of wheel tire shoulder.

Description of drawings

Fig. 1 is existing all-steel radial tyre 0 degree structure design scheme drawing.

Fig. 2 is all-steel radial tyre 0 a degree structural design drawing of the present utility model.

Fig. 3 is the utility model shoulder bizet theoretical analysis finite element analysis grid chart.

Fig. 4 is the utility model tire shoulder, crown part bit location grid and takes on empty defect theoretical analysis finite element analysis grid chart.

Fig. 5 the utility model finite element analysis strain energy extreme value comparison diagram.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is made a detailed explanation.

Embodiment 1

All-steel radial tyre as shown in Figure 2 with 0 degree bracing ply, 4 structures, this tire comprises table top portion 1, sidewall portion 2, bead part and carcass plies 3, it is 3# bracing ply 7 that the outside of carcass plies 3 is followed successively by 1 # bracing ply 6,2 # bracing ply 5 and 0 degree bracing ply, 4,0 degree bracing plys, 4 middle parts.

Bracing ply severing width adjustment: 1# bracing ply 6 width are 165mm, and 1# bracing ply 6 bound edge films are adjusted into 30mm*1.0mm; 2# bracing ply 5 width 200mm, the edge-wrapping adhesive width adjustment is 240mm, isolates film and is adjusted into 30mm*1.5mm; 3# bracing ply 7 width 100mm.

0 degree bracing ply 4 is wider than 1 # bracing ply 6, and 1 # bracing ply 6 and 0 degree the differential of bracing ply 4 are 7.5mm.2# bracing ply 5 is wider than 0 degree bracing ply 4, and 2 # bracing ply 5 and 0 degree the differential of bracing ply 4 are 10mm.All the other are produced after doing suitable adjustment by 11.00R20 or the normally sold inside the country tire of 12.00R20.

Embodiment 2

All-steel radial tyre as shown in Figure 2 with 0 degree bracing ply, 4 structures, this tire comprises table top portion, sidewall portion, bead part and carcass plies, the outside of carcass plies is followed successively by 1 # bracing ply 6,2 # bracing ply 5 and 0 degree bracing ply 4, wherein: 0 degree bracing ply 4 is wider than 1# bracing ply 6, and it is 6.5mm that 1 # bracing ply 6 and 0 is spent the differential of 4 grades of bracing plys.2# bracing ply 5 is wider than 0 degree bracing ply 4, and 2 # bracing ply 5 and 0 degree the differential of bracing ply 4 are 11mm.The other technologies feature is shown in embodiment 1.

The test example

Structure and existing structure to the utility model embodiment 1 have carried out the finite element analysis of tire construction mechanics, and conclusion is as follows:

One, inflation geometrical variations

1, inflation and the contrast of design physical dimension

Project	Embodiment	1	Prior art
				Overall diameter	1085.71	1085.65
Section is wide	286.45	286.73

2, load physical dimension contrast down

	Embodiment 1	Prior art
			Air pressure kPa,	930.00	930.00
Load kg	5530.00	5530.00

Load is the wide mm of section down	324.34	324.51
			Load is quiet radius mm down,	499.08	500.54
Deflection mm	42.42	42.29
			Deflection ratio	7.81	7.79
Impression minor axis mm	209.904	209.27
			Impression major axis mm	335.03	334.99
Impression area cm2	703.22	701.04
			Unit area average pressuure kpa	786.38	788.82

To the utility model structural adjustment scheme and ordinary production tire carried out inflation, overload profile geometrical variations contrasts, the utility model structural adjustment scheme is less to the influence of tire physical dimension.

Two, tire shoulder position data contrast

As shown in Figure 3, the typical failure area of selection is: zone 8 and 2# belt ends zone (comprising bracing ply end points, interlayer film, shoulder pad glue, tread slab base etc.) between 1#, 2# bracing ply, the shoulder sky mainly occurs in these main zones.We have carried out comparative analysis to stress, strain, strain energy and shoulder regions strain energy extreme value and the amplitude of the unit of takeing on empty critical area.

As shown in Figure 4, no matter the utility model organization plan is that decline has by a relatively large margin all appearred in tire shoulder failure area 9, bracing ply doubling, tire shoulder e1, e2, e3 regional stress, strain strain energy, take on empty failure area strain energy extreme value, the amplitude fall reaches more than 10%, it is empty to adopt this kind structure will effectively reduce shoulder.

Test figures is shown in Fig. 5 and following table:

The contrast of tire shoulder critical area strain energy extreme value

Scheme	The shoulder failure zone	The bracing ply doubling	e1	e2	e3
						Embodiment
1	0.2693	0.3897	0.1156	0.0979	0.0869
						Existing structure	0.3576	0.6164	0.1378	0.1361	0.0892

Three, durability test

Following table is the utility model structure and existing structure durability test correlation data.

By finished product durability lathe contrast test as can be seen, the utility model infrastructure product endurance quality has the lifting more than 20%.

Claims (4)

1. the all-steel radial tyre that has 0 degree bracing ply (4) structure, this tire comprises table top portion (1), sidewall portion (2), bead part and carcass plies (3), the outside of carcass plies is followed successively by 1# bracing ply (6), 2# bracing ply (5) and 0 degree bracing ply (4), it is characterized in that: 0 degree bracing ply (4) is wider than 1# bracing ply (6), 1# bracing ply (6) and the 0 differential 3mm that is at least that spends bracing ply (4) level.

2. the all-steel radial tyre with 0 degree bracing ply (4) structure according to claim 1 is characterized in that: 1# bracing ply (6) is 4～10mm with the difference of 0 degree bracing ply (4) level.

3. the all-steel radial tyre with 0 degree bracing ply (4) structure according to claim 1 and 2 is characterized in that: 2# bracing ply (5) is wider than 0 degree bracing ply (4).

4. the all-steel radial tyre with 0 degree bracing ply (4) structure according to claim 3, it is characterized in that: 2# bracing ply (5) and 0 is spent the differential 9～11mm of being of bracing ply (4).

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