Decoupling pulley

摘要

A decoupling pulley having a rim attached to a first power transmission element, and a torsion spring mounted in a receptacle attached to a second power transmission element, one of the power transmission elements being driving and the other of the power transmission elements being driven, the receptacle is a bell inside which is centered the spring, which spring has a first and a second end region, each of which bears on a bearing face of the bell, wherein the rim has a first drive abutment having a first face cooperating with the first end region of the spring to drive the latter in the direction of closure in a first relative rotational direction between the rim and the bell, the bell includes a first bell abutment, the angular position of which defines a first given maximum value α1 for the travel of the first end region of the spring driven to close by the first drive abutment.

主权项

1. A decoupling pulley comprising;
a rim securely attached to a first power transmission element, a bell securely attached to a second power transmission element one of the power transmission elements being driving and the other of the power transmission elements being driven, and a torsion spring having several turns mounted in and centered inside the bell, which spring has a first and a second end region, wherein the rim is coaxial to the bell, surrounds the bell and has at least one first drive abutment having a first face cooperating with the first end region of the spring to drive the latter in a first relative rotational direction between the rim and the bell which corresponds to a direction of closure whereas the second end region of the spring bears on a bearing face of the bell, and wherein the bell comprises at least one first bell abutment, the angular position of which defines a first given maximum value (α1) for the travel of the first end region of the torsion spring driven to close by said first drive abutment.