| 摘要 |
An adjustment device includes a distance adjustment device having two connection plates, two elongated through holes defined in the crossbar to correspond to each of the two connection plates, and two pairs of bolt-nut combinations each corresponding to the two holes of each of the two connection plates, and a height adjustment device which has a driving arm pivotally connected between the pump and the crossbar and having a protrusion formed on a bottom of the driving arm, a sliding track movably received in each of the forks and engaged with the protrusion of the driving arm, and a leverage adapted to be pivotally engaged with each of the forks and one distal end of which is connected to a first distal end of the sliding track and the other distal end of which is adapted to an auxiliary wheel of the fork.
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