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杆秤的主要部件“秤杆”是由木杆或金属杆构成。一、杆秤的工作原理:杆秤是根据有固定转动轴物体的平衡条件——“外力对固定轴的力矩的代数和为零”而工作的。杆上的提纽即为固定的转动轴。二、杆秤的制作1.杆秤的部件与组装:取一杆状物体,在粗端的端点 A 处钻一园孔,装上秤钩并挂上秤盘(有的杆秤也不要秤盘)。再在 A 点的右侧一定距离的 O 点处钻一园孔,装上提纽。
The main part of the steelyard “branch bar” consists of wood or metal rods. First, the working principle of the steelyard: The steelyard works according to the equilibrium condition of the object with a fixed rotary axis—the “external force is algebraic and zero for the fixed axis torque”. The Tinew on the rod is a fixed axis of rotation. Second, the production of steelyard scales 1. Steelyard components and assembly: Take a rod-shaped object, drill a hole in the end of the thick end A, install the hook and hang the scale (some scales do not pan). Then drill a hole at the O point on the right side of point A and install Tinew.