利用鲍尔点设计液压支架直线导向机构

Design of Straight-line Guiding Mechanism for Hydraulic Support Using Ball Point

基于欧拉-萨伐里方程和曲率-驻点曲线方程提出一种液压支架四连杆直线导向机构设计的解析方法。在给定底座与前、后连杆铰点位置、支架直移段上一点的位置及其方向角的条件下,以前连杆方位角为设计变量,建立解析模型求解所有的含鲍尔点直线机构,梁端轨迹含三阶密切直线。该方法对正、反四连杆支架均适用,最后通过设计示例验证设计与分析方法的有效性和可行性。

Based on Euler-Savary equation and curvature-stagnation point equation,an analytical method for the kinematic design to four-bar approximate straight-line linkage in hydraulic support was presented.For given frame points,a point on the prescribed straight line and its orientation,the analytical model was established with the angle of front link as design parameter.All possible straight-line mechanisms with Ball point can be able to solve.There is a three-order osculating straight line in the motion trajactory of the tip of caving shield.This method can be applied into the design of the forward and backward supports.To demonstrate the effectiveness and feasibility of the approach,an example was given.