| 摘要 |
A step adjuster of an oval trackwalker includes two assembly frames respectively connected pivotally with a sector gear and a movable sector disc for mutual movement. An eccentric portion of the sector gear and the movable sector disc are respectively connected to crank blocks in slide grooves of the assembly frames by means of adjusting arms, and pedal cranks are respectively connected with studs of the crank blocks and pedals. Then, the sector gear has semi-round teeth engaging with a worm of a grip, moving to form a proper angle and synchronously adjusting the distance between two pedals and the connect rods to perform step adjustment, achieving the effectiveness of handling with ease and quickness and economizing the cost.
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