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带有棘輪螺旋棒的轉釬机构是由几何軸线重合的三连件組成。就結构而言,它属于三連件同心螺旋机构。固定件(螺旋棒和机壳)与繞自身軸綫作空間螺旋运动的主动件(活塞)及繞自身軸线旋轉的从动件(轉动套)相互接合。为了简化空間机构动靜力学的計算,我們利用构件的同心性和螺旋运动的特性来进行分析。将軸綫与机构軸綫重合且包含主动件和从动件实际运动軌迹的圆柱体表面展开后,便使空間运动的原理图轉換到平面上来。因为,对于动静力学計算而言,只要对
The rotary bracing mechanism with a ratcheting spiral rod is composed of three connecting pieces with coincident geometric axes. In terms of structure, it belongs to a three-piece concentric spiral mechanism. The fixing member (helical rod and housing) is engaged with a driving member (piston) that performs spatial spiral motion around its own axis and a driven member (turning sheath) that rotates around its own axis. In order to simplify the calculation of the dynamic and static mechanics of the space mechanism, we use the concentricity of the components and the characteristics of the spiral motion for analysis. The surface of the cylinder, which coincides with the axis of the mechanism and contains the actual movement path of the driving part and the follower, is transformed into a plane. Because, for dynamic and static mechanical calculations,