Helically-toothed-belt transmission device

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

Patent

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Details

F16H 7/02 (2006.01) F16H 1/28 (2006.01) F16H 55/38 (2006.01)

Patent

CA 2521132

Noise and vibration of a helically-toothed-belt transmission device driven under heavy load or at a high-speed rotation, are reduced. A backlash "D" is selectively enlarged in a helically-toothed-belt transmission device that transmits drive force by meshing between a helically toothed belt and a helically toothed pulley. That is, a tooth helix angle ".theta." is set in a range of -0.2 <= 1- W .cndot. tan.theta. / Pt <= 0.75, with "Pt" being a tooth pitch, ".theta." a tooth helix angle, and W the width of the belt. The backlash "D" between the helically toothed belt and the helically toothed pulley is set to be 1.6%-3% of the tooth pitch "Pt".

L'invention permet de réduire le bruit et les vibrations d'un dispositif de transmission par courroie à denture hélicoïdale, entraîné dans un état de charge élevée ou à grande vitesse. Le jeu (D) est réglé de manière lâche dans un dispositif de transmission par courroie à denture hélicoïdale qui transmet la force d'entraînement par engrènement d'une courroie à denture hélicoïdale et d'une poulie à denture hélicoïdale. L'angle d'hélice ( theta ) d'une dent est réglé de manière à être compris entre 0,2=1-W tan theta /Pt=0,75, Pt représentant l'espacement angulaire des dents, theta représentant l'angle d'hélice d'une dent, W représentant la largeur de la courroie. Le jeu (D) entre la courroie à denture hélicoïdale et la poulie à denture hélicoïdale est de 1,6 %-3 % de l'espacement angulaire des dents.

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