| 摘要 |
A brush support arm delay and accelerating mechanism for a vehicle washing apparatus having a supporting frame with an upper frame member extending over the path of a vehicle to be washed, includes a mounting arm attached to the upper frame member and having a bracket pivotally mounted thereto with a spring biasing means connected between the bracket and the mounting arm. A pair of bumpers are mounted on the bracket so that one of the bumpers contacts the brush support arm during outward pivotal movement of the brush support arm to retard the outward pivotal movement thereof and the other of the bumpers contacts the brush support arm during inward pivotal movement of the brush support arm to accelerate the inward pivotal movement of the brush support arm during a vehicle washing operation.
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