Hand jack is a commonly used type of jack, its principle is to achieve the operation of lifting objects through the rotation of the hand. The hand jack is usually composed of the main part, the hand rocker, the gear set, the spiral bar, the support base and so on.

The main part is mainly composed of steel plates and castings, and is connected to the hand rocker through a tie rod to fix the entire jack structure. The hand rocker is the main handle of the manual operation jack, and the rotation of the spiral bar is realized by the rotation of the handle. The gear set is an important part of the hand jack. It is composed of gears and bearings and is used to transmit the rotational force of the hand crank to the spiral bar. The spiral bar is the core component of the hand jack. It is a spiral lever that pushes the jack up and down through its rotation. The support base is the bottom structure of the hand jack, which can fix the position of the jack and prevent the jack from sliding or tilting during use.

The use of hand jack

The hand jack is a simple and easy-to-use type of jack. The use method is as follows:

1. First, place the hand jack under the object that needs to be lifted or supported to ensure that the jack is in a horizontal state and the support base is stable.

2. Then insert the hand rocker into the gear set, and rotate the hand rocker to make the gear set start to rotate.

3. The rotation of the gear set will drive the rotation of the spiral bar, and the rotation of the spiral bar will make the lifting rod of the jack rise or fall

4. When it is necessary to stop the lifting of the jack, just stop the rotation of the hand rocker.