| 摘要 |
<p>The independent lift comprises two spaced apart, vertical columns containing braces and support plates in them to at least stabilise and brace the vertical support posts to each other, in a spaced-apart relationship, and two independent lifting arms, each being fixedly attached at its near end to a first rotatable shaft which is rotatably locked into respective bearings on each of its outer and inner ends. Inner ends of each shaft are surmounted by a first pinion gear movably integrated with a rack to provide vertical rectilinear motion from vertical reciprocating motion. Each rack is a movable, elongated shaft having an upper end and a lower end, and is slidably mounted in channel bearings. Each rack is movably integrated with a second pinion gear at its lower end, each second pinion gear being fixedly surmounted on a common shaft. A driving end of the common shaft is integrally locked to and driven by a transmission located adjacent the common shaft. The transmission is driven by gears located in a gear box adjacent the transmission, the gear box being driven by a third shaft which is driven by a power source controlled by a control device mounted on the independent lift near the user.</p> |
