電動扳手bai就是以電源或電池為動力的扳手，是du一種擰緊高強度螺栓的工具，又zhi叫高強螺栓槍。主要分為沖擊扳dao手、扭剪扳手、定扭矩扳手、轉角扳手、角向扳手。沖擊電動扳手主要是初緊螺栓的，它的使用很簡單，就是對準螺栓扳 動電源開關就行。
Electric wrench Bai is a wrench driven by power supply or battery. It is a tool for tightening high-strength bolts, also called high-strength bolt gun. It is mainly divided into impact wrench Dao hand, torsion shear wrench, constant torque wrench, angle wrench and angle wrench. The impact electric wrench is mainly used to tighten the bolt, and its use is very simple, which is to align the bolt and pull the power switch.
電動扭剪扳手主要是終緊扭剪型高強螺栓的，它的使用就是對準螺栓扳動電源開關，直到把扭剪型高強螺栓的梅花頭打斷為止。電動定扭矩扳手既 可初緊又可終緊，它的使用是先調節扭矩，再緊固螺栓。電動轉角扳手主要也屬于定扭矩扳手的一種，它的使用是先調節旋轉度數，再緊固螺栓。電動角向扳手是一 種專門緊固鋼架夾角部位螺栓的電動扳手，它的使用和電動扭剪扳手原理一樣。
The main purpose of the electric wrench is to finally tighten the high-strength bolt. Its use is to align the bolt and pull the power switch until the plum head of the high-strength bolt is broken. The electric constant torque wrench can be used for initial tightening and final tightening. Its use is to adjust the torque first and then tighten the bolts. Electric angle wrench is also a kind of constant torque wrench. Its use is to adjust the rotation degree first, and then tighten the bolt. The electric angle wrench is a kind of electric wrench specially used to tighten the bolts at the angle of steel frame. Its use is the same as that of the electric twist shear wrench.
單頭螺栓扳手適用于鐵道線路日常保養和維修的專用工具，它具有輕便機動，快捷等特點，單頭螺栓扳手結構簡單，操作方便，使用可靠，是理想的作業工具。
The single head bolt wrench is suitable for the special tools for daily maintenance and repair of railway lines. It has the characteristics of portable, efficient and fast. The single head bolt wrench has the advantages of simple structure, convenient operation, safe and reliable use, and is an ideal operation tool.
單頭螺栓扳手工作原理：發動機輸出旋轉扭矩，通過離合器，傳動軸，錐齒輪換向減速機構實現旋轉扭矩的換向于減速，換向于減速后的扭矩由連接軸傳遞到有蓄力加力裝置作用的沖擊加力機構上，然后通過套筒對螺栓上的螺帽實現松開和鎖緊作業
Working principle of single head bolt wrench: the engine outputs rotating torque, which is reversed to deceleration by clutch, transmission shaft and bevel gear reversing and reducing mechanism. After reversing, the torque after deceleration is transferred to the impact afterburner with force accumulation and force adding device by connecting shaft, and then loosen and lock the nut on the bolt by sleeve
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