The four-bar linkage model of hydraulic support using virtual prototype technnique is established with the help of ADAMAS software.

Based on specific requirement for the top-coal caving mining to the four-bar linkage,a design method of the four-bar linkage is put forward in the paper in which the least difference function between the lemniscate locus and the power function curve is used as the main objective function.

The paper briefly introduces the structure and operation principle of the rear-mounted engine translational motion compartment door, the dimention confirm of four-bar linkage, the check of dynamics and the choice of pneumatic spring, locks, etc.

The auther introduces a pneumatic clamping device which is reinforced by a four-link mechanism, and analyses the forced feature of the reinforcing mechanism in details.

For a definite four-bar mechanism of hydraulic support, the function relation between the height of support and the level angle of the backbar is established.

Resolution of four-bar mechanism position question may be concerned with the resolution of nonlinear equation group.

In this paper, a new motion-simulating algorithm of four-bar mechanism oriented towards virtual prototyping is provided.

When the last two joints of robotic dexterous finger are mechanically coupled by means of planar four-bar linkage mechanism,it is very difficult to directly solve the inverse kinematics of the finger.

The feasible schemes of lift mechanism applied on flatcar are presented,including a four-bar linkage mechanism with a length-alterable component-ball screw shaft,and the calculating methods of structure parameters and force analysis methods of crank rocker mechanism and rotating guide bar mechanism are discussed emphatically.