TH25202B - Tires with H / S pattern ratio values less than or equal to 0.6 - Google Patents

Abstract

DC60 In order to improve the durability of the tread reinforcement material (3) of the tire, the H / S pattern ratio of the said tire is It has a maximum value of 0.6, the tread reinforcement is made radially from inside to side. Outside by a triangular canvas (31) made up of metal cables at least 60 degrees angled, two working layers (32, 34) made up of metal cables that cannot Stretchable, which is positioned at an angle of between 10 and 45 degrees between the layers is interpolated with a canvas. The first (33) layer of metal parts placed mostly parallel to the circumference of the tire, the second (36) additional layer of canvas, positioned. On either side of the tire It sits above the outermost working canvas (34) and is centered on the end of the first additional canvas (33) in order to improve the durability of the tread reinforcement ( 3) of the tire's H / S pattern ratio of that tire is It has a maximum value of 0.6, the tread reinforcement is made radially from inside to side. Outside by a triangular canvas (31) made up of metal cables at least 60 degrees angled, two working layers (32, 34) made of non-metallic cables. can Stretchable, which is positioned at an angle of between 10 and 45 degrees between the layers is interpolated with a canvas. The first (33) layer is made of metal parts positioned mostly parallel to the circumference of the tire, the second additional layer (36), which is located. On either side of the tire It is above the outermost working canvas (34) and centered on the end of the first additional canvas (33).

Claims (6)

1.Tire P, which is composed of a ribbed frame reinforcement (I) covered by a tread reinforcement (3), which consists of at least two layers of tread working canvas (32,34 ), Made up of non-stretchable cables, crossed from one layer (32) to the next (34), forming an angle (alpha, beta) between 10 degrees and 45. Degrees to the circumference, such a layer has a width L32, L34 at least 80% of the maximum axial width of the material. Reinforcing the scaffold (1) and, is positioned, firstly, between the ribbed reinforcement material (1) and the working canvas layer (32), which is nearest radially to the axis of rotation, An axial continuous canvas layer (31), made up of non-elongated metal cables, forming a delta of at least 60 degrees to the circumferential direction and having an axial width L31 As minimal as The axial width L32, L34 of the shortest tread working tarp (32,34), and, in the second order, was placed between the two tread working canvas layers ( 32) and (34), the first (33) additional layer of canvas made up of metal parts placed parallel to the contour direction. Around the circle significantly The axial width L33 of the canvas is at least 0.7, SO, and the modulus of elasticity when traction is as much as the one named modulus. The most stretchable working canvas layer (33, 34) is characterized by a second additional layer (36), made up of metal parts arranged in parallel. With direction along Significantly girth, which is less than L36, is radially above the working canvas. Of the radial outer tread (34) and on either side of the tire P, in such a way that it is centered significantly on the end of the first additional trampoline (33), And in such a way that That the ends are axially spaced at least 10 mm from the end of the first additional canvas layer (33) placed between two working canvas layers (32,34). 2. The tire P, corresponding to claim 1, is characterized by the modulus of elasticity when traction of the second additional layer (36) of the canvas is equal to the modulus with Same name Of the first additional canvas layer (33) 3. The tire P, which corresponds to claim 2, is characterized by Joint modulus of The additional canvas layer (33,36) was low for relative elongation between 0% and 0.4% and was the greatest. Equates to the modulus of maximum elasticity when traction of the canvas in the most elongated working, for a relative elongation greater than 0.4%. 4. Tires P, which corresponds to claim 3, which is characterized by: An additional layer of canvas (33, 36) has been made up of a material known as a flexible cable, whose tension curves are Functions of relative elongation It has a soft gradient for only a small elongation between 0 and 0.4% and a significantly steeper and constant gradient for a greater elongation. 5. Tire P, which corresponds to claim 3, which is characterized by: An additional canvas layer is obtained. Constructed from circumferential cables And has been cut to create a long section Significantly less than the smallest length of the canvas perimeter (33), the intersection is Indentation in a relative way to each other along the axis 6. The tire P, which corresponds to claim 1 to 5, either Which has the characteristics The tread reinforcement (3) is further composed of what is known as the protective tarp (35) located on the outermost outermost line, constructed from flexible cables angled in the same direction and has The value is essentially equal to the angle of the working canvas underneath (34) and the circumference, and is characterized by the second additional layer (36) between 15 and 50 mm wide. The above additional canvas layer (36) extends the protective canvas layer (35) along the axis, and such an extension has been made. This is done by leaving only a gap smaller than 5 mm between the axial inner end of the additional fabric layer (36) and the axial outer end of the canvas layer (35) of the elastic cable.