Material handling unit with readily-removable bearing assembly

摘要

A load balancing mechanism includes an inner support bracket, a load support bracket end a pair of parallel support arms which join the inner support bracket and the load support bracket together. The arms are supported by a load balancing cylinder arrangement which offsets the weight of loads supported on the load support bracket and permits the arms to be raised and lowered manually by a user even when the load is heavy. The opposite ends of the support arms are joined to the brackets by a pivot pin and a pair of bearing assemblies such that each connection between an end of an arm and a bracket is supported by two bearing assemblies at the opposite ends of the pivot pin. This arrangement permits removal and maintenance of one bearing assembly while the other bearing assembly remains in load-bearing engagement to support the load.