Patent ID: 6238313
Filing Date: 2001-05-29
Classification: F16G,F16H

Abstract:
Drive belt (6) for use in a continuously variable transmission with a driving shaft (AP) and a driven shaft (As), each shaft being provided with a pulley (3; 5) having two sheaves (9, 10) with a pulley surface (21), whereby the pulley surfaces (21) of the two pulleys (3; 5) are mutually oriented at an angle thereby defining a V-shaped groove, said drive belt (6) comprising a plurality of transverse elements (8) carried by at least one endlesscarrier (7a, 7b) comprising at least one endless band, received in a receiving slot (18, 15, 13, 17) provided for said band in said element (8), the slot (18, 15, 13, 17) allowing relative axial play (Pa) between said element (8) and said band relative to the predominant longitudinal direction of the belt (6), characterized in that the axial play (Pa) is of a value between 0.2 and 0.95 times the maximum amount of misalignment defined for the belt (6), indicated in amount of lateral displacement (S) determined by a skewing formula: ##EQU2##wherein:D is a diameter of a curved run of the drive belt (6) when contacting the pulley surfaces (21) of the pulleys (3; 5) at unity transmission ratio (E=1) L is a perpendicular distance between the driving shaft A and the driven shaft As;E is the transmission ratio of the transmission; and.alpha. is half the angle of the V-shaped groove defined by the pulley surfaces (21).