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    SOMMET DE PNEUMATIQUE POUR VÉHICULE LOURD DE TYPE GÉNIE CIVIL
    1.
    发明公开
    SOMMET DE PNEUMATIQUE POUR VÉHICULE LOURD DE TYPE GÉNIE CIVIL 审中-公开

    公开(公告)号：EP3390107A1

    公开(公告)日：2018-10-24

    申请号：EP16825515.6

    申请日：2016-12-14

    申请人： Compagnie Générale des Etablissements Michelin

    发明人： SPINNLER, Olivier ,  NUGIER, Franck ,  DOMINGO, Alain

    IPC分类号： B60C11/00 ,  B60C9/20 ,  B60C11/03

    摘要： The invention relates to the crown of a tyre for a heavy goods vehicle for civil engineering. The aim of the invention is to desensitise said crown to stress. To this end, the tyre (1) comprises a tread (2) having a surface siping rate TL, expressed in m/m 2, which is equal to the ratio of the cumulated length L D of the cuts (21) to the area A of the radially outer surface (23) of the tread (2), and a protective reinforcement (4) comprising at least two protective layers (41, 42) consisting of elastic metal reinforcing elements and having a maximum tensile strength R max, expressed in daN/m, such that the surface siping rate TL of the tread (2) is at least equal to 3 m/m 2, and a coupling ratio C, equal to the ratio of the maximum tensile strength R max to the surface siping rate, is at least equal to 30000 daN.

    PNEU POUR VÉHICULE DE GÉNIE CIVIL AYANT UNE ENDURANCE AMÉLIORÉE
    5.
    发明公开
    PNEU POUR VÉHICULE DE GÉNIE CIVIL AYANT UNE ENDURANCE AMÉLIORÉE 有权
    TIEFBAUFAHRZEUGREIFEN MIT VERBESSERTERBESTÄNDIGKEIT

    公开(公告)号：EP3119615A1

    公开(公告)日：2017-01-25

    申请号：EP15709965.6

    申请日：2015-03-17

    申请人： Compagnie Générale des Etablissements Michelin ,  Michelin Recherche et Technique S.A.

    发明人： SPINNLER, Olivier ,  CHAUVIN, Dominique

    IPC分类号： B60C9/28 ,  B60C9/20 ,  B60C11/03

    CPC分类号： B60C9/28 ,  B60C9/0007 ,  B60C9/2006 ,  B60C11/0306 ,  B60C11/04 ,  B60C2009/2016 ,  B60C2009/2019 ,  B60C2009/209 ,  B60C2011/0346 ,  B60C2011/0353 ,  B60C2011/0355 ,  B60C2200/065

    摘要： Tyre (1) for a heavy vehicle of civil engineering type comprising a crown part extended on either side by sidewalls (3), the sidewalls and the beads, this crown part comprising a tread (2) and a crown reinforcement, the latter being situated radially between the tread (2) and a carcass reinforcement (4), the crown reinforcement comprising a protective reinforcement (6), a working reinforcement (5) and an additional reinforcement (7), the protective reinforcement (6) comprising at least one protective layer (61, 62) comprising elastic metallic reinforcers which, with the circumferential direction, form an angle at least equal to 10°, the working reinforcement (5) comprising at least two working layers (51, 52) comprising metal reinforcers which are crossed from one working layer to the next and, with the circumferential direction, form an angle at most equal to 60°, the additional reinforcement (7), centred axially on the equatorial mid plane of the tyre, comprising at least one layer (71, 72) having an axial width at most equal to 0.9 times the shortest of the axial widths of the at least two working layers (51, 52) and comprising metal reinforcers which, with the circumferential direction, form an angle at most equal to 25°, the tread (2) being provided with a tread block pattern that comprises at least two circumferentially oriented grooves (10), this tyre being such that the mean axial distance between the two grooves (10) closest to the equatorial mid plane is greater than the maximum axial width of the additional reinforcement (7) measured between the ends of the layers of this additional reinforcement that are axially furthest from the equatorial mid plane.

    摘要翻译： 轮胎具有冠状部分，其侧壁以珠形结束。 冠部具有胎面和胎冠加强件。 冠部加强件具有保护，加工和附加加固。 保护性加强件具有形成至少等于10°的角度的弹性金属加强件的保护层。 加工加强件具有交叉金属加强件的工作层，并且在圆周方向上形成至多等于60°的角度。 附加加强件具有一层，其轴向宽度最多等于工作层的轴向宽度的最短的0.9倍，并且包括形成最多等于25°的角度的金属加强件。 胎面花纹图案设计具有周向定向的凹槽。 最接近赤道中平面的两个凹槽之间的平均轴向距离大于附加加强件的最大轴向宽度。