Multi-ribbed belt with tip profile

F - Mech Eng,Light,Heat,Weapons – 16 – G

Patent

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Details

F16G 5/20 (2006.01)

Patent

CA 2471928

The invention comprises a multi-ribbed belt (100) wherein rib tip (32) has a concave arcuate surface (36) disposed between substantially flat surfaces (41,42), which are in turn disposed between rib side surfaces (34,35). The substantially flat surfaces are adjacent to curved surfaces (39,40), which connect to rib side surfaces (34,35). The inventive rib profile and rib compound construction significantly reduce rib tip cracking, which significantly reduces belt flex fatigue under high applied frictional torque. Further, the inventive rib profile and rib compound construction significantly reduces high localized tensile stress/strain at the rib tip and highly localized shear stress at the rib flank, thereby significantly reducing rib tip cracking and rib tear off. The inventive belt also comprises a significantly reduced contact normal force, thereby increasing an operating life of the belt.

L'invention comprend une courroie (100) multi-nervures dans laquelle une extrémité (32) de nervure présente une surface arquée concave (36) disposée entre des surfaces sensiblement planes (41, 42) lesquelles sont à leur tour disposées entre les surfaces latérales (34, 35) des nervures. Les surfaces sensiblement planes sont adjacentes aux surfaces incurvées (39, 40) qui relient les surfaces latérales (34, 35) des nervures. Le profil de nervures et la construction composée des nervures de l'invention réduisent de manière significative la fissuration de l'extrémité des nervures, ce qui réduit de manière significative la fatigue de flexion de la courroie soumise à un couple frictionnel appliqué élevé. De plus, le profil de nervures et la construction composée des nervures de l'invention réduisent de manière significative l'effort de traction/l'allongement en traction localisé au niveau de l'extrémité des nervures ainsi que les contraintes de cisaillement très localisées sur le flanc des nervures, réduisant ainsi de manière significative les fissures des extrémités des nervures ainsi que la déchirure des extrémités. La courroie de l'invention comprend également une force de contact normale réduite de manière significative, augmentant ainsi la durée de vie de fonctionnement de la courroie.

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