新型长幅内摆线机构设计

Design of new type long amplitude hypocycloid mechanism

目前往返直线运动主要通过曲柄滑块机构来实现的,但是这种机构存在着众多不足,其中主要的一点就是滑块的行程较短,无法实现大行程的直线往复运动。针对这一问题,提出一种新型的长幅内摆线机构的总体设计方案,该机构在不增加原始机构体积的同时还实现了行程放大机理。对机构进行运动学分析和建立数学模型,并运用仿真软件对其结构分析获得了滑块运动的速度加速度曲线图,结果表明该机构运动性能比较优越。

At present the reciprocate-linear motion was accom- plished mainly by the slider-crank mechanism,but there exist multi- ple defects in this kind of mechanism. The main defect is the shorter stroke of the slider, and it is not capable of achieving a large strokeof the reciprocating motion. In terms of this defect, proposed in this paper was an overall design of a new type long amplitude hypocy- cloid mechanism. The mechanism achieves a stroke amplification one, without increasing the volume of the original institutions. A kinematic analysis is made of the mechanism and a mathematical model established. A speed acceleration graph of the slider is ob- tained by making use of a simulation software to analyze the struc- ture and it turns out that the kinematic performance is superior.