目前国内动力触探所采用的自动落锤,不外乎偏心轮式和抓勾式两种。这两种装置都有其共同的弱点,我们在几个工程中使用后发现,如小轴或弹簧被泥沙嵌塞,不能动弹,偏心轮中间的弹子盘易打碎,抓钩或偏心轮失灵等等。为此,我们研制了球式落锤装置,经少量工程的初步试验,取得了较好的效果,现介绍如下:一、结构(见图1) At present, the automatic drop hammer used in domestic power penetration testing is nothing more than eccentric wheel type and catch type. Both of these devices have their common weaknesses. After using them in several projects, we discovered that small shafts or springs are impacted by mud and cannot move, and that the center of the eccentric wheel is easily broken, grapple or eccentric. Failure and so on. For this purpose, we have developed a ball-type drop hammer device, and after a few preliminary tests of the project, we have achieved good results. We now introduce it as follows: 1. Structure (see Figure 1)