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Jack Detailed description

The jack is one kind uses the steel roof lifting piece as the working device, through the top support seat or the bottom claw in the stroke inside lifts the heavy weight the small lifting equipment, according to the structure characteristic may divide into the rack jack, the screw jack and the hydraulic Jack 3 kinds.

Jack is a lifting height of small (less than 1m) The simplest lifting equipment, it has mechanical and hydraulic two types, the mechanical jack has the rack and the spiral two kinds, because of the small weight, the operation laborious, generally only uses in the mechanical maintenance work, in the repair bridge process does not apply; The hydraulic jack structure is compact, the work is stable, has the self-locking function, therefore uses widely. Its disadvantage is the lifting height is limited, the hoisting speed is slow.


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