锁紧车床卡盘一般常用工具是扳手。扳手结构虽简单,但有时往往因操作者精神不集中或其它原因,易将扳手丢置在卡盘上,待启动车床的卡盘旋转,扳手随即甩出。由此造成的事故屡见不鲜。为解决这一问题,我们专门设计、制做了如图所示的自退卡盘扳手,其工作原理如下:操作者手握手柄件4两端,将主体件5下端方头压入车床卡盘内方孔中。 Locking lathe chuck commonly used tool is a wrench. Although the wrench structure is simple, but sometimes due to the operator is not focused or other reasons, easy to lose the wrench on the chuck, to be started turning the lathe chuck, wrench then thrown. The resulting accident is uncommon. To solve this problem, we specially design and manufacture the self-retracting chuck wrench as shown in the figure. The working principle is as follows: the operator grips both ends of the handle part 4 and presses the lower end of the main part 5 into the lathe card Pan in the hole.