DISPOSITIF DE FREINAGE A BALOURD

摘要

This braking device for retarding moving objects such as a pallet on a gravitationally-actuated conveyor system comprises a housing and a gear train or equivalent supported by the housing, including at least a first gear and a terminal gear and preferably an intermediate gear intermeshed so as to progressively increase angular velocity as the first gear is rotated. At least the terminal gear in the gear train is substantially imbalanced about the rotational axis thereof whereby rotational resistance increases as angular velocity increases. Means are also provided for translating the movement of the moving objects into rotational movement of the first gear so that the forces to rotate the gear train, including the imbalanced last gear, act to retard the moving object. In specific embodiments, the imbalance of the last gear is obtained by selectively removing material from a portion thereof, by selectively adding weight thereto or a combination of both.