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根据摆辗机摆头结构特点,设计了内外偏心套传动矢量运动模型,利用Matlab软件对异速同向双偏心套的运动轨迹进行了模拟仿真,当外偏心套转速ω_1>0,内偏心套转速ω2>0,且ω1≠ω2时,摆辗机摆头的运动轨迹为螺旋线型,阐述了一个周期内螺旋线空间曲线的形成规律,并对影响螺旋线的参数进行了分析。结果表明:螺旋线的起点位于(2R,0)处,运动周期为2π,在0~π时刻,摆头轴端中心点逐渐靠近轴心同时螺旋式上升;在π~2π时刻,摆头轴端中心点逐渐远离轴心同时螺旋式上升;螺旋线旋转的圈数为β或1/β真分数的分母和分子之差,β或1/β越小,螺旋线的重叠部分越少;β或1/β接近1,螺旋线的重叠部分越多。
According to the structural characteristics of swing head swing structure, the design of the inner and outer eccentric sleeve transmission vector motion model, using Matlab software to simulate the motion trajectory of the same speed double eccentric sleeve, when the outer eccentric sleeve speed ω_1> 0, When the rotation speed ω2> 0, and ω1 ≠ ω2, the movement trajectory of swing head swinging is spiral type, and the forming regularity of spiral space curve in one cycle is expounded, and the parameters affecting the spiral line are analyzed. The results show that the starting point of the helix is at (2R, 0) and the period of motion is 2π. At the 0 ~ π time, the central point of the oscillating head gradually approaches the axis and spirally rises at the same time. At π ~ 2π, The central point of the end gradually spiral away from the center of the axis; the number of turns of the helix is the difference between the denominator and the numerator of the β or 1 / β true fraction, and the smaller the β or 1 / β is, the smaller the overlap of the helix; Or 1 / β approaches 1, the more the helical portion overlaps.