Filtering pulleys have a hub, which is designed to be fixed to a rotary shaft rotating around an axis (A), and a crown, which is coaxial to said hub. The filtering pulley includes a filtering assembly operatively interposed between the hub and the crown and a housing integral to the crown and carried so that the housing can freely rotate relative to the hub by means of support means. The filtering assembly defines a space and has elastic means housed inside the space in a movable manner, and has actuator means configured to cooperate in contact with the elastic means. The actuator means is a single piece together with a tubular portion of the hub and the housing cooperating in contact with the radial inner surface of the crown.

A torsional damper according to the present disclosure includes an inner sleeve and an outer sleeve. The inner sleeve is configured to couple with a shaft, arranged concentrically with an axis of rotation. The inner sleeve has a generally annular profile with a periphery and a male spline extending from the periphery. The outer sleeve is disposed about the inner sleeve, and arranged concentrically with the inner sleeve. The outer sleeve has a generally annular profile with a periphery and a female spline recessed within the periphery. The inner and outer sleeves are arranged with the male spline disposed within the female spline. The damper additionally includes a resilient coupler arranged between the male spline and the female spline. The damper further includes a ball disposed between the inner sleeve and the outer sleeve and configured to inhibit radial motion of the outer sleeve relative to the inner sleeve.

A torsional vibration absorber for a vehicle is provided. The torsional vibration absorber including a front pilot bearing adapted to couple with a vehicle shaft. A spring member is coupled to the front pilot bearing. An inertia ring having an inner surface is operably coupled to the spring member, wherein the front pilot bearing is centrally disposed along the length of the inertia ring. A rear pilot bearing is adapted to couple with the vehicle shaft, the rear pilot bearing having a portion adjacent the inner surface at one end of the inertia ring.

In a transfer structure of a vehicle according to one aspect of the present invention, a drive shaft includes: a first power transfer shaft including a first end coupled to a differential device; a second power transfer shaft including a first end coupled to a second end of the first power transfer shaft through a first universal joint; and a third power transfer shaft including a first end coupled to a second end of the second power transfer shaft through a second universal joint and a second end to which a driving wheel is coupled, and dampers are provided on at least two respective power transfer shafts. Among these dampers, a predetermined damper arranged on the longest power transfer shaft out of the at least two power transfer shafts functions in a frequency region lower than a frequency region in which a remaining damper functions.

A filtering pulley has a hub adapted to be fixed to a shaft rotating around an axis (A), a crown mounted coaxially and rotationally free on the hub and a filtering unit operatively interposed between the hub and the crown. The hub has a first portion and a second portion, with the first portion being radially encompassed around the axis (A) by the crown, and with the second portion being only partially radially encompassed around the axis (A) by the crown. The pulley has a support means for supporting the crown on the hub, which is the only element radially interposed between the first portion and the crown.