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J2130型向心力演示器是一种新型教学仪器,具有直观、操作方便等优点,解决了长期以来向心力演示实验难的问题.但经过两年的使用,发现该产品(以下简称原机)在结构上尚存在一些不足之处,特分析如下:1、置于旋臂上的球,在旋臂转动时,产生离心现象沿半径方向位移,改变了半径比.尽管原机采用了补偿措施,仍不能正确反映半径比与示值比的关系.原机的杠杆传动机构是一种常用的正切机构,如图1所示.球的位移转换成杠杆
The J2130 centripetal force demonstrator is a new type of teaching instrument, which has the advantages of being intuitive and easy to operate. It solves the problem that it has been difficult to demonstrate experiments for a long time. However, after two years of use, it was found that the product (hereinafter referred to as the original machine) was structurally There are still some deficiencies, and the following are special analysis: 1. The ball placed on the arm, when the arm rotates, produces a centrifugal phenomenon that shifts in the radial direction, changing the radius ratio. Even though the original machine used compensatory measures, it still cannot Correctly reflects the relationship between radius ratio and indication ratio. The lever transmission mechanism of the original machine is a common tangential mechanism, as shown in Fig. 1. The displacement of the ball is converted into a lever.