Fittings ridge pneumatic tyres

 

The invention relates to the automotive industry. The armature of the crest contains at least two working layers of the ridge, formed of inextensible reinforcing elements, crossed from one ply to the other and forming with the circumferential direction angles in the range from 10 to 45and continuous in the axial direction of the additional layer. The latter is formed of metal reinforcing elements placed in the radial direction between the working layers, the axial width of which is at least 1.1 of the axial width of the widest working layer of the ridge. This increases the strength of the tire. 5 C.p. f-crystals, 2 Il.

The present invention relates to a pneumatic tire with a radial reinforcement of the frame, are fixed in each Board on at least one side of the ring and containing a reinforcement ridge formed in at least two working layers, stacked on top of each other and formed of wire or cord yarns, parallel to each other in each layer and crossed from one layer to the next, forming with the circumferential direction of the pneumatic tire angles not exceeding 45

In this patent application to improve durability or service life of the valve crest pneumatic tires, as well as to improve the uniformity of wear of the tread propose the construction of a valve of the ridge, which is characterized by the presence of reinforcement continuous in the axial direction of the layer formed of inextensible cord yarns, forming with the circumferential direction of the pneumatic tire angle at least equal to 60and a layer formed of metallic elements oriented essentially parallel to the district direction and located radially between two working layers of the ridge.

This design helps to reduce temperature operation taking place at the edges of the working layers of the ridge, and the width of the additional layer of circumferential cord yarns is less than the width of each of the working sections.

Some modern so-called “road” pneumatic tires designed for movement increase the length of the road network in the world. The set of conditions that have to work this pneumatic tire, without any doubt helps to increase the number of passable she kilometers with a lower level of wear. However, this reduces the resistance or durability of the pneumatic tire and, in particular, the reinforcement of its crest.

In this case, the lack of resistance applies to both the fatigue strength of the layers of the ridge, in particular the resistance to separation between the ends of the layers, and the fatigue strength of cord threads of the plot reinforcement frame, located under the valve of the ridge, and the lack of resistance of the first kind are strongly influenced by high temperature operation, which takes place at the edges of the working layers, whether straight movement or movement on the bends.

The above-mentioned problems have been solved in a satisfactory manner by modifying the principle of construction of the tire.

Thus, in French patent FR 2744955 claimed and described a pneumatic tire with a radial valve frame having a shape factor H/S at least equal to 0.60 and containing the valve crest formed of at least two working layers of the ridge, formed of inextensible cord but 45in the absence of any layer, formed of inextensible cord yarns, forming with the circumferential direction an angle exceeding 45contains one additional layer, continuous in the axial direction, is formed of metal reinforcing elements, which are oriented essentially parallel to the district direction, placed in the radial direction between the working layer and having an axial width, comprising at least 1,05 from the axial width of the widest working layer component and preferably at least 1.1 of the axial width of the widest working layer.

If the problem is related to the division between the working layers and fatigue strength cord yarns reinforcement frame represented solved, when it is possible to significantly lower the temperature of operation for any value of the shape factor pneumatic tyres, long rolling with curves designed pneumatic tyres, having a value of shape factor not exceeding 0,60, identifies fatigue breaks cord yarns additional layer, or more precisely, the edges of the mentioned layer regardless of the presence or absence of so nazivaetisa tires of this type of best possible compromise between different characteristics, must possess fittings such pneumatic tyres, namely between the fatigue strength of all reinforcing elements of the reinforcement layers, the resistance to separation between the layers, can lower temperature operation, as well as the weight of this pneumatic tyres and lowest possible cost of its industrial production.

Pneumatic tire in accordance with the invention, having a radial armature armature, and the armature of the ridge containing at least two working layers of the ridge, formed of inextensible reinforcing elements, crossed from one ply to the other and forming with the circumferential direction angles in the range from 10 to 45and contain an extra layer, continuous in the axial direction, is formed from a metal reinforcing elements placed in the radial direction between the working layer and having an axial width, comprising at least 1.1 of the axial width of the widest working layer of the ridge, and a pneumatic tire characterized by the fact that the reinforcing elements of the additional layer are solid, metal, inextensible and downstream society zero meridional curvature and separated from the first and second working sections of the crest necessary profiled elements essentially triangular in shape. In this case, under essentially zero meridional curvature of the layer should understand the curvature radius of which is at least 2.00 times the Equatorial radius of curvature of the working layer.

The phrase “inextensible cord thread” should be understood such cord thread, which is made, for example, of steel and which have a relative elongation at the level of less than 0.5%, measured under load, which constitutes 10% of their breaking load.

Metal and essentially radial reinforcing elements are elements forming with the circumferential direction of the pneumatic tire angles in the range from +85 to -85relative to 0.

In a preferred implementation of the invention, the reinforcement ridge pneumatic tyres supplemented by a so-called protective layer of the ridge, formed from metallic elastic cord yarns, made of steel and oriented with respect to the district direction at an angle essentially equal to the angle formed with this circumferential direction of the cord threads of the most outside in the radial direction of the working layer of the ridge, the axial width of which is at least equal to Asiago described above technical solutions, the armature of the ridge can also be expanded from the inside in the radial direction and between the valve frame and the inner radial direction of the working layer closest to the valve frame, the so-called triangulation layer, formed of inextensible reinforcing elements forming with the circumferential direction an angle exceeding 60and having the same direction as the angle formed by this circumferential direction of the reinforcing elements of the layer that is closest in the radial direction of the valve frame.

Mentioned triangulation layer may have an axial width less than the axial width of the widest working layer, which this valve designs ridge is the closest to the valve frame. Triangulation layer may also have an axial width greater than the width of the widest working layer.

Other characteristics and advantages of the invention will be better understood from the following description with reference to the accompanying drawings, in which:

Fig.1 depicts a longitudinal section of the valve of the crest of the pneumatic tire in accordance with the invention; and

Fig.2 is a second embodiment of the valve of the crest of the pneumatic tire in accordance with the invention.

Pneumatic tyre R size 385/55.R.22.5 X is a shape factor H/S, equal to 0.55, gknow axial width.

Pneumatic tyre R contains radial reinforcement of the frame 1, are fixed in each Board on at least one side of the ring, forming therein a turnover, and formed one layer of metal cord threads.

The valve frame 1 tightened fittings ridge 3 formed in the radial direction when considering from the inside out the following elements:

the first working layer 32 of the ridge, formed of inextensible metal cord threads, made of steel and oriented at an anglecomprising 18;

located on top of the first working layer 32 of crest extra layer 33 formed of inextensible metal elements made of steel, and these elements are oriented at an angle of 90in relation to the district direction, and the outer axial edge of the first working layer of the ridge is separated from the additional layer 33 of the radial elements of the profiled elements 4 essentially triangular cross-section, made of rubber, the thickness of the rubber E2 between the layer 32 and the layer 33, measured at the outer axial end of the layer 32, extending t the s cord threads, of which formed the first working layer 32, and forming with the circumferential direction an anglein the opposite direction of the cornerand having in the present embodiment, an amount equal to the angleand component 18. The anglemay differ from the value of the angle;

and the last layer 35 formed of metal and the so-called elastic cord yarns, made of steel and oriented with respect to the district under the direction anglethe same direction as the angleand equal in magnitude to this corner(but which may have a value different from the value of this angle), and the last layer is a protective layer, and an elastic cord thread are cord thread, characterized by at break elongation, comprising at least 4%.

The axial width L32the first working layer 32 is 0.75 of the maximum axial width S0the middle line of the valve frame 1 or 290 mm for pneumatic tires of the usual form represents the beam is 325 mm

The axial width L34the second working layer of the ridge 34 is essentially equal to the above-mentioned width of the L32and is in this case 286 mm

The axial width L33an additional layer 33 is equal to 320 mm, which is 0,827 width from S0. Indeed, the width of the L33an additional layer 33 is substantially greater than the width L32(L34) the widest working layer.

The last protective layer 35 of the ridge has a width of L35slightly larger than the width of the L34the working layer of the ridge 34 and the component 300 mm

The secant modulus, tensile working layer 32 or the working layer 34, are identical in the present case, since these layers are formed of the same restenotic and inextensible metal cord threads of steel 14.28, continuous across the entire width of the layer, and cord thread are one and the same step, i.e. with the same distance between the cord filaments, measured in the direction perpendicular with respect to the cord threads exceeds 5000 Dan/mm2relative elongation at the level of 0.4% in the present case, 5500 Dan/mm2.

As for the extra layer 33, it is the secant modulus in compression relative to the layer for relative elongation, having the same value. In this case, the layer 33 is formed of drawn metal cord threads, made of steel 27.23.

Pneumatic tyre, schematically shown in Fig.2, differs from the pneumatic tire shown in Fig.1, the presence of a triangulation layer which is in the radial direction from the inner side and between the reinforcement frame 1 and the inner radial direction of the working layer 32, the closest to the said valve frame 1.

This triangulation layer 31 is formed of inextensible metal cord threads, made of steel and forming with the circumferential direction an anglewith the value 65and the same direction as the angleformed with this circumferential direction of the reinforcing elements of the working layer 32 that is closest in the radial direction of the armature frame 1. Mentioned triangulation layer 31 has an axial width L31that component 310 mm and exceeding thus the width of the widest working layer 32.

Claims

1. A pneumatic tire having a radial reinforcement frame x of the reinforcing elements, crossed from one layer to the other and forming with the circumferential direction angles in the range from 10 to 45and continuous in the axial direction of the additional layer (33) formed of metal reinforcing elements placed in the radial direction between the working layers (32, 34), the axial width L33is at least 1,1 axial width L32, L34the most extensive layer (32, 34) of the ridge, wherein the reinforcing elements of the additional layer (33) is a continuous metal and inextensible elements, made of steel and which is essentially radial.

2. Pneumatic tyre under item 1, characterized in that the additional layer (33) is essentially zero meridional curvature.

3. Pneumatic tyre under item 1 or 2, characterized in that the layer (33) formed of drawn metal cord threads, and its secant modulus in compression for the relative decline of 0.4% has a value of from 0.33 to 0.66 values hewer module under tension for the same value of relative elongation.

4. Pneumatic tire according to any one of paragraphs.1-3, characterized in that the reinforcement ridge (3) the further the layer (34) and is formed of an elastic metal cord threads, the axial width L35at least equal to the axial width of the L34most outside in the radial direction of the working layer.

5. Pneumatic tire according to any one of paragraphs.1-4, characterized in that the reinforcement ridge (3) contains the inner side in the radial direction and between the reinforcement frame (1) and inside in the radial direction of the working layer (32), closest to the valve frame (1), triangulation layer (31) formed of inextensible reinforcing elements forming with the circumferential direction an angle exceeding 60and having the same direction as the angle formed by this circumferential direction of the reinforcing elements of the working layer (32).

6. Pneumatic tyre on p. 5, characterized in that the triangulation layer (31) has an axial width L31greater than the width of the widest working layer (32, 34).

 

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Pneumatic tyre // 2120388

The invention relates to the tire industry and can be used in the manufacture of radial tires

FIELD: automatic industry; tyre industry.

SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker, carcass, side strips and bead rings. Diameter of metal cord is from 1.14 to 1.26 mm. Metal cord proper is made of equal-diameter metal threads, ratio of metal thread diameter to diameter of metal cord being from 0.253 to 0.298. Ratio of breaker metal cord pitch to diameter of metal cord is from 1.9 to 2.25, and linear density of metal cord lies within 5.0 and 5.5 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 0.35 to 1.49, breaking strength of metal cord being not lower than 1715±5N.

EFFECT: reduced materials usage, labour input and energy consumption at production of tyres.

2 dwg

FIELD: automotive industry; tyre industry.

SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker, carcass, side strips and bead rings. Diameter of metal cord is from 0.87 to 0.97mm. Metal cord proper is made of metal threads of equal diameter, ratio of diameter of metal thread to diameter of metal cord being from 0.242 to 0.293. Ratio of pitch of metal cord in breaker to diameter of metal cord is from 1.85 to 2.076, and linear density of metal cord lies within 2.84 and 3.16 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 1.62 to 1.85, and breaking strength of metal cord is not lower than 955±5N.

EFFECT: reduced materials usage, labour input and power consumption at production of tyres.

2 dwg

FIELD: automotive industry; tyre industry.

SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker consisting of metal cord and textile layers, carcass, side strips and bead rings. Diameter of metal cord is from 0.83 to 0.91 mm. Metal cord proper is made of metal threads of equal diameter, ratio of diameter of metal thread to diameter of metal cord being from 0.280 to 0.331. ratio of pitch of metal cord in breaker to diameter of metal cord is from 1.978 to 2.168, and linear density of metal cord lies within 2.64 and 2/96 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 1.538 to 1.839, and breaking strength of metal cord is not lower than 855±5N.

EFFECT: reduced materials usage, labour input and power consumption at production of tyre.

2 dwg

FIELD: automotive industry.

SUBSTANCE: proposed pneumatic tire has crown, two side strips and two beads as well as carcass reinforcement secured in each bead and crown reinforcement provided with working unit and protective unit form inside to outside in radial direction. Protective unit contains at least one layer of parallel reinforcement circumferentially orientated elements. Layer of protective unit is formed by reinforcement elements made of aromatic polyamide with initial modulus of elasticity not less than 1000 cN/tex and breaking strength exceeding 65 cN/tex.

EFFECT: increased strength of pneumatic tire crown.

20 cl, 5 dwg

FIELD: automotive industry; tire industry.

SUBSTANCE: invention relates to tires for machines used in civil engineering. Proposed tire has radial carcass reinforcement 1 second in each bead by means of ring reinforcement member of bead and radially upper crown reinforcement containing at least two working layers of non-stretchable metal cord with intersecting threads of layers, width of said layers is at least 50% of tread width L, and radially upper two protective layers along crown made of so-called elastic metal cord with intersecting threads of layers. Tread includes, in its grooveless part of thickness D, at least one reinforcement made of strengthening members. Said reinforcement consists of at least two layers of textile monofiber whose threads are parallel in each layer. Axial width of said layers is at least equal to width of most narrow working layer.

EFFECT: increased strength of crow of pneumatic tire.

4 cl, 1 dwg

FIELD: tire industry.

SUBSTANCE: invention relates to design of automobile tires, particularly to those used in construction vehicles. proposed reinforcement pack N of pneumatic tire contains reinforcement member embedded in converting materials and it includes first layer C1 and second layer C2 of metal elements E1, E2 parallel to each other and embedded into covering materials M1, M2 and third layer C3 of elements E3 made of textile material is placed between two layers C1 and C2, third layer being embedded into covering material M3. Textile elements E3 are orientated relative to elements E1 and E2 at angle within 70° and 110°.

EFFECT: increased strength of tires.

7 cl, 4 dwg

FIELD: tire industry.

SUBSTANCE: invention relates to tire with radial reinforcement of carcass for use on heavy vehicles, such as transport or construction and road-building machines. It relates to tire with axial width exceeding 37 inches. According to invention, tire has working reinforcement crown consisting of at least two uninterrupted working layers and terminating from each side of circumferential (equatorial) middle plane in at least two half-layers whose metal reinforcement members form angles exceeding minimum angle which is formed by reinforcement members of uninterrupted layers relative to circumferential direction. Half-layer passing in axial direction outwards further than other half-layers is in contact with widest in axial direction uninterrupted layer in crown, and two half-layers cover in radial direction axially outer end of said working layer widest in axial direction.

EFFECT: increased service life of tire.

8 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Air tire has breaker structure that comprises first breaker layer (51), second breaker layer (52) arranged in radial-inner position relative to first breaker layer (51), third breaker layer (53) arranged in radial inner position relative to first (51) and second (52) breaker layers. Every breaker layer (51, 52, 53) comprises multiple elongated reinforcing elements arranged above 1st, 2nd and 3rd breaker angles. Note here that 1st and 2nd angles vary from 15 to 40 degrees. Second angle has opposite sign relative to 1st breaker angle. Third breaker angle features magnitude varying from 40 to 90 degrees and opposite sign with respect to second angle. Breaker structure comprises also breaker layer (54) arranged at zero degree angle relative to 1st breaker layer (51) comprising elongated reinforcing elements arranged to make, in fact, zero breaker angle,.

EFFECT: perfected performances.

21 cl, 11 dwg

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