在装配车间里,经常要使用手电钻。用手电钻钻孔有两个缺点:1)劳动强度大:2)钻ф10公厘以上的孔时,危险性大。为了克服这两个缺点,我们采用了一套安全装置,现将它介绍如下。 (一)结构:这套装置的结构如图1所示。图中1是顶盖,用铁板制成。12是支架,用粗铁管制成;粗铁管的外圆最好粗车一下,使铁管的外圆有一定的正圆度和光洁度。9是底盘,用铁板制成。顶盖1和底盘9焊在支架12的两端(看图2);底 In the assembly shop, often use a hand drill. Drilling holes with a hand drill has two drawbacks: 1) High labor intensity: 2) When drilling a hole with a diameter of 10 mm or more, the danger is high. In order to overcome these two shortcomings, we have adopted a safety device, which is introduced below. (A) Structure: The structure of this device shown in Figure 1. Figure 1 is the top cover, made of iron. 12 is a bracket, made of thick iron pipe; coarse rough rough outer tube about the car, so that the outer cylindrical pipe has a certain degree of roundness and finish. 9 is the chassis, made of iron plate. The top cover 1 and the chassis 9 are welded at both ends of the bracket 12 (see FIG. 2); the bottom