Pulley assembly
AssigneeDayco Europe S.R.L.
InventorHervé Riu
Life of this patent
Estimating the term…
Abstract
A pulley assembly for flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, a spiral spring interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for coupling by a tangential force transmission the hub to the supporting member. In particular, the sliding portion defines a first contact zone and a second contact zone in which is concentrated the contact pressure exchanged between the sliding portion and the sliding wall, the first and second contact zone being reciprocally and angularly distanced.
Claims23
A pulley assembly for flexible motor vehicle transmission, comprising a supporting member rotatable about an axis (A), a pulley adapted to cooperate with a belt and connected to said supporting member to be rotatable about said axis (A) with respect to said supporting member, a spiral spring interposed between said supporting member and said pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of said supporting member or pulley for coupling said pulley to said supporting member by a circumferential force transmission, wherein said sliding portion defines a first contact zone and at least one second contact zone in which the contact pressure exchanged between said sliding portion and said sliding wall is concentrated, said first and at least one second contact zones being angularly spaced apart in a circumferential direction;
- wherein said spiral spring comprises a supporting element and in that said sliding portion comprises at least one runner carried by said supporting element and defining at least one of said first and second contact zones;
- and
- wherein said sliding portion comprises said supporting element and in that it comprises a stop member against which said sliding portion is locked in a stop position with respect to said sliding wall.
Dependencies are inferred from the claim text.