自动调节扳钳类似用钳子卡紧条状机件。扳钳主手柄与固定钳口锻在一起,随动手柄与销轴把活动钳口联接起来。设计的关键是销槽结构尺寸的确定,既要可靠地联接两手柄,又要使活动钳口直线移动。扳钳夹紧螺母螺栓时,该结构能保持两夹面平行。随动手柄装有弹簧,手松开后,钳口能在弹簧作用下自动张开。这种新工具省去了传统扳手调整钳口开度的蜗杆机构。 Automatic adjustment of the wrench is similar to pliers clamping strip. Wrench main handle and fixed jaw forging together, follow the handle and the pin to move the jaw together. The key to the design is to determine the size of the pin groove structure, it is necessary to reliably connect the two handles, but also to move the jaws move straight. Wrench clamping nut bolts, the structure can keep the two clamping parallel. The handle is spring-loaded. After the hand is released, the jaws can open automatically under the action of a spring. This new tool eliminates the need for a conventional wrench to adjust the jaw opening mechanism.