What Is The Car Trailer Jack?(1)

Generally speaking,the car trailer jack is mainly used in the situation when the trailer and tractor trailer come of to play the role of support.

1.The structure of the car trailer jack

The outer cylinder is an important part of the car trailer jack,inside the outer cylinder is the the inner cylinder which is lower than the top of the outer cylinder.There is a screw connected to the outer cylinder top.The screw would go through the inner cylinder and be connected to the nuts fixed inside the inner cylinder,as a result,the rotary movement of the screw can be turned into linear motion of the inner cylinder.

Besides,on top the screw,there is a hand shank.The bearing of the car trailer jack having functions of supporting and guiding is arranged between the upper part of the outer cylinder and the screw.While the bottom of the inner part stretches out the outer cylinder and is welded with a tripod with trundle.