Lever-actuated clamping device for the attachment of an anti-skid system to the rim of a vehicle wheel

An assembly for attachment of a snow chain to a bolt (B) of a vehicle wheel is disclosed, of the type comprising tightening-bush means and a centring rod (107) whereon an attachment element (200) is slidable, said bush means comprising a socket-shaped body (102) wherein a tightening bush (100) which may be coupled with said bolt (B) is slidable, the relative sliding between said bush (100) and said socket-shaped body (102) being accomplished by a nut/screw coupling between a first and a second tightening element (103, 104), wherein one of said tightening elements (104) can be coupled in rotation with said centring rod (107).