偏心凸轮与滚子
偏心圆盘凸轮、双耳滚子叉、直线导套与有端座的预压弹簧。
What is it made of?
01 机架、通孔轴座与长导套
长青铜导套约束圆杆竖向滑动；下方轴座真实贯通，弹簧上端坐在固定环肩。
02 偏心盘、轮毂与轴肩
盘圆心偏轴0.65；轴孔、前轮毂及后轴肩与固定通孔支承对应。
03 滚子、双耳叉与直动杆
滚子在两叉耳之间；通孔、青铜衬套、贯穿销和两侧止推垫圈构成清晰支承链。
04 压簧与闭合端圈
固定上端环肩和随动下端环肩之间压缩；保持线径，端圈平坐，不用整体缩放压扁钢丝。
How do the parts work together?
滚子中心满足 y=e sinθ+√((R+r)²−e²cos²θ)，R=1.8、r=0.42、e=0.65；接触距离恒2.22。
滚子中心满足 y=e sinθ+√((R+r)²−e²cos²θ)，R=1.8、r=0.42、e=0.65；接触距离恒2.22。
Model scope and approximations
AI-assisted educational schematic, not manufacturing CAD. Materials, proportions and movements are limited to this model's description.
理想力封闭运动，不计算弹簧力、惯性脱离及滚子无滑动自转。导套/销轴有可见几何间隙；不是制造公差模型。
Sources
- Primary academic mechanism reference
CMU Chapter 6 defines a rotating cam and translating roller follower on a fixed frame. Model specializes to an eccentric circular cam; exact contact is derived from circle-circle tangency, not a claimed source-specific production profile.
