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这种快速扳手(见图)由扳手体1、销子(棘爪)2、弹簧3和螺钉4组成。用这种扳手只要往复扳动就可拧紧螺母。拧紧时,螺母迫使销子2与扳手体1贴紧,此时弹簧3不受力,螺母跟随扳手旋转。扳手返回时,螺母静止不动,靠螺母的六方棱角推动销子压缩弹簧3,当销子2爬过螺母六方棱角的一瞬间,销子2被弹簧3弹出复位,扳动扳手又可继续拧紧螺母。这样,只要往复扳劝扳手就可拧紧螺母。松开螺母时,只
This quick wrench (see picture) consists of wrench body 1, pin (pawl) 2, spring 3 and screw 4. Use this wrench to tighten the nut just by pulling it up and down. When tightened, the nut forces the pin 2 into tight contact with the wrench body 1, at which point the spring 3 is not stressed and the nut rotates with the wrench. When the wrench returns, the nut is stationary, and the pin compression spring 3 is pushed by the hexagonal corners of the nut. When the pin 2 climbs over the corner of the nut six corners for an instant, the pin 2 is reset by the spring 3 and the wrench can be tightened again Nut. In this way, the nut can be tightened by simply pulling the wrench back and forth. Only loosen the nut