如图1所示的棘轮扳手,制造简单,使用方便。图中1是扳手体,5是棘轮,由螺帽4固定在扳手体1中。6是锁键,7是定位键,8是弹簧。当扳手向左扳动时(图1所示位置),棘轮被锁键卡紧,锁键又被定位键卡紧,所以棘轮就被扳动。在向右扳动时,锁键被棘轮的齿向右压去,棘轮不与扳手体同时动作,锁键在棘轮上滑动。如果要向右扳时,可以 As shown in Figure 1 ratchet wrench, easy to manufacture, easy to use. Figure 1 is a wrench body, ratchet 5, nut 4 is fixed in the wrench body 1. 6 is the lock key, 7 is the positioning key, 8 is the spring. When the wrench is pulled to the left (the position shown in FIG. 1), the ratchet is locked by the lock key, and the lock key is locked by the positioning key, so the ratchet is pulled. When it is pulled to the right, the lock key is pressed to the right by the ratchet teeth, the ratchet wheel does not move simultaneously with the wrench body, and the lock key slides on the ratchet wheel. If you want to pull to the right, you can