Abstract: A lifting unit for a vehicle wheel designed to cooperate with a tire changing machine and a balancing machine arranged on opposite sides thereof and located at a respective operating level, said lifting unit comprising at least one support frame, guide means vertically extending from said support frame, a cross-member guide slidingly mounted on said guide means and arranged to be moved up and down thereon, driving means carried by said support frame and arranged to move said cross-member guide on said guide means, a bracket means slidingly supported on said cross-member guide and designed to carry a vehicle wheel to be processed, a limiting means slidably carried on a vertical guide means, supported by said support frame, and arranged to engage with said guide means to act upon said driving means, wheel detecting means carried by said support frame and arranged to detect the diameter of a wheel standing on said bracket means, and control means arranged to position said limiting means depending upon the diamet

Abstract: A universal self-centering device for heads or sensors for checking the trim of the wheel assemblies of motor vehicles in general, comprising a contoured plate, which is provided with a central hub for supporting a head which is adapted to acquire the trim data of a wheel assembly of a motor vehicle; with a circumferential plurality of radial slots, with which respective double-acting grip claws are slidingly associated, the claws being adapted to engage, from the inside and from the outside, the bead retaining rim of a wheel; and a grip unit, which is adapted to fasten onto the tire mounted on the wheel and comprises a common actuation element, which is placed at the center of the plate and is kinematically coupled to the claws so as to make them slide along the slots with a simultaneous mutual approach or spacing motion.

Abstract: A fixture for locking motorcycle wheels onto the shaft of balancing machines having a spindle coaxial to the shaft for supporting the wheel to be balanced, and members for making the shaft and the wheel rotationally rigid. The fixture includes a diametrical entrainment arm to be fixed to the end of the balancing shaft, and wheel clamping members provided by a body pivoted in the manner of a rocker element to each of the ends of the entrainment arm. The body having clamping members at one end, and at its opposite end a counter-weight is arranged such that, under the action of centrifugal force, the body increases its clamping action on the wheel.

Abstract: The locking ring includes a body having an axis and a hole along the axis. The body receives a shaft in the hole. The body includes a cavity, a first passageway communicating with the cavity, and a locking mechanism for releasably locking the body to a portion of the shaft disposed in the hole. The locking ring further includes a piston member having a piston head and a piston rod connected to the piston head. The piston head is disposed in the cavity, and the piston rod projects from the cavity in a direction parallel to the axis. The piston member moves relative to the body when pressure is supplied to the cavity via the first passageway.