VARIABLE PHASE COUPLINGS

摘要

An assembly capable of varying the relative phase of rotation between a driving sprocket wheel (6) and a camshaft (1) comprises a carrier (8) fixed to the sprocket wheel and carrying compound idler bevel gears (B, E and C, D). The inner idler gears (E, D) mesh with a bevel gear (F) fixed to the camshaft (1) to impart rotation to the camshaft. The outer idler gears (B, C) mesh with a ring gear (F) carried by a sleeve shaft (2) which is adjustable in angular position by means of a worm (9) and a worm wheel (10) arrangement to vary the phase of the camshaft rotation relative to the phase of the sprocket wheel rotation.