Tire spinner with dual 4 bar mechanism for spin and brake

摘要

A wheel spinner assembly used in dynamic balancing to spin the wheel to determine the magnitude and angular orientation of the imbalance. A motor and spinner are provided mounted on a support for pivoting the spinner into engagement with the wheel to be balanced. Also provided is a brake element that also has a pivotally mounted support so that the brake may be pivoted into engagement with the associated wheel after spinup. For the purpose of pivoting both the brake and the spinner selectively into engagement with the wheel to be balanced, a linkage assembly is provided including a first link connected to the spinner support and a second link pivotally connected to the first link at one end and the brake support at the other end. This linkage permits both the brake and the spinner to be operated by a common handle and also provides the operator with the proper leverage and feel during both braking and spinup. Another feature of the present invention is that both the brake support and the spinner and motor support are pivotally mounted about the spinner wheel axle providing a simplified construction. For resisting the tendency of the tire to urge the spinner assembly away from the tire there are provided resilient feet projecting downwardly from the spinner for gripping the ground surface.