Jack is the top of a steel sex give care through the top of the seat or bottom of the claw care during the journey and lifting heavy objects as a working device, light lifting equipment. Structural features can be divided into three kinds of rack jack, screw jacks and hydraulic jacks. The jack is a lifting height is small (less than 1m), the most simple lifting equipment. It has two kinds of mechanical and hydraulic. Mechanical jacks to another rack and two spiral, because from the weight of a small, operating effort, is generally used for the mechanical maintenance work, bridges and the process of NA. Hydraulic jack compact, smooth, self-locking effect, it is widely used. The disadvantage is that the lifting height is limited, slow lifting. 
 Jack http://www.bthxzw.com/QJD.html 
 The jack is divided into two kinds of mechanical jacks and hydraulic jacks, the principle is different. Principle, based on the principle of the hydraulic jacks for the Pascal principle, namely: the pressure of the liquid throughout is the same, so in a balanced system, the smaller the pressure exerted by the piston above is relatively small, while the large piston The applied pressure is relatively large, to be able to maintain the liquid at rest. Passed through the liquid, can be a different pressure on the different side, so that you can achieve the purpose of a transformation. The hydraulic jacks we often see is the use of this principle to achieve the transfer of power. The mechanical jack with mechanical principles, in the past after lever handle, pull claw that drive the rotation of the ratchet gap, umbrella gear driven by the large bevel gear, weightlifting screw rotation, so that the lifting sleeve lifting or falling, to achieve the lifting tension function. But not as simple hydraulic jack 
 Jack http://www.bthxzw.com/QJD.html 
 The Botou Navistar cast material measuring 
 Tel: 5664468 13373071795 
 Contact: Xin Yue