机械机构

       机械运动是通过不同的机械机构来实现的。常见的机械机构有以下几种：
       齿轮机构：它是靠均匀分布在轮边上的齿的直接接触来传递力。
       曲柄连杆机构：它是用简单的机构得到较大的位移。
       蜗轮蜗杆机构：它是齿轮传动机构的一种，主要用于传递垂直相错轴之间的运动。

       链条机构：它用于传递平行轴之间的回转运动，或把回转运动转换成直线运动。

       The mechanism locomotion is finished by the different machine organizations. The familiar machine has several types below:
       Gear wheel machine: It delivers power on the direct contact of the dint even round gear side.
       Crank and connecting rod: It gets the bigger displacement with simple organization. 
       Worm wheel worm machine: It is one type of gear wheel transmission machine. It is primarily used for delivering the movement between the perpendicular axes.
       Chain machine: It is used for delivering the turn-over movement between equal stalk, and switch turn-over movement to straight line movement.