常用的扭力扳手有手動扭矩扳手、電動扭矩扳手、氣動扭矩扳手和液壓扭矩扳手，之前寫了很多關于液壓扳手的文章，在這里就不再重復講了，下面就跟大家探討下手動扭矩扳手、電動扭矩扳手和氣動扭矩扳手的特點及功能
The commonly used torque wrenches include manual torque wrench, electric torque wrench, pneumatic torque wrench and hydraulic torque wrench. I have written many articles about hydraulic wrench before, which will not be repeated here. Now I will discuss the characteristics and functions of manual torque wrench, electric torque wrench and pneumatic torque wrench
1、機械式扭力扳手：在使用中如果力矩達到所設定力矩值后就會有“咔咔”類似機械碰撞報警的聲音，此時扳手就不能再進行工作了，防止出現(xiàn)過力現(xiàn)象。
1. Mechanical torque wrench: in use, if the torque reaches the set torque value, there will be a "click" sound similar to mechanical collision alarm. At this time, the wrench can no longer work to prevent excessive force.
2、數(shù)顯式或者指針式扭力扳手：這兩種是在機械式扭力扳手上加裝數(shù)顯或指針式力矩表，將作用力矩可視化。
2. Digital display or pointer torque wrench: these two types are to add a digital display or pointer torque meter on the mechanical torque wrench to visualize the acting torque.
3、自動滑轉式扭力扳手：這種扭力扳手工作原理是達到設定力矩后自動卸力，起到過載保護的作用。
3. Automatic sliding torque wrench: the working principle of this torque wrench is to automatically release the force after reaching the set torque and play the role of overload protection.
以上三種手動扭力式扳手中，屬機械式扭力扳手流通較為廣泛，其因為成本低、便宜，市面上使用較多。
Among the above three manual torque wrenches, mechanical torque wrenches are widely used in the market because of their low cost and low price.
二、電動扭力扳手：是指可以在扳手上面設定扭矩值的電動扳手，是目前流通更廣、使用頻率較高的一款電動扳手。其按使用功能又分為電流式電動扳手和帶動態(tài)扭矩傳感器式電動扳手兩種。
2、 Electric torque wrench: it refers to the electric wrench that can set the torque value on the wrench. It is the most widely circulated and frequently used electric wrench at present. According to the use function, it is divided into current electric wrench and electric wrench with dynamic torque sensor.
1、電流式電動扳手：這種電動扭力扳手是根據(jù)電機擰緊過程中電流值的變化來判斷扭力值的，一旦達到設定的扭矩值，電機就自動停機停止工作。按使用范圍不同分為直柄式電動扭矩扳手和彎柄式電動扭矩扳手。
1. Current electric wrench: this electric torque wrench judges the torque value according to the change of current value during motor tightening. Once the set torque value is reached, the motor will automatically stop working. It can be divided into straight handle electric torque wrench and curved handle electric torque wrench according to the scope of use.
2、帶扭矩傳感器式電動扳手：這種帶傳感器的扳手是在減速箱體上安裝有扭矩傳感器，可以監(jiān)測到扳手扭力值變化，一定達到預定的扭矩值，電機就自動停機工作。
2. Electric wrench with torque sensor: This wrench with sensor is equipped with torque sensor on the reduction box, which can monitor the change of wrench torque value. When the predetermined torque value is reached, the motor will stop working automatically.
電動扭力扳手的使用范圍較為廣泛，而其所具有扭矩精度高、使用范圍廣、故障率低、使用壽命長的特性，在很多領域得以發(fā)揮作用。
Electric torque wrench is widely used, and it has the characteristics of high torque precision, wide application range, low failure rate and long service life, which can play a role in many fields.
三、氣動扭力扳手：這種扳手工作原理是壓縮氣體作為氣源，設定氣壓后通過氣動三聯(lián)件帶動扳手中的啟動馬達來驅動齒輪對螺栓進行擰緊，主要有油壓脈沖式、離合器式、動態(tài)扭矩傳感器式。
3、 Pneumatic torque wrench: the working principle of this wrench is to use compressed gas as the air source. After setting the air pressure, the pneumatic triplet drives the starting motor in the wrench to drive the gear to tighten the bolts, mainly including oil pressure pulse type, clutch type and dynamic torque sensor type.
1、油壓脈沖式和離合器式：這兩種氣動扳手是通過扭矩值達到設定值后自動斷氣來避免過力的。
1. Oil pressure pulse type and clutch type: these two pneumatic wrenches automatically cut off the air after the torque value reaches the set value to avoid excessive force.
2、扭矩傳感器式：當扭矩值達到設定扭矩值后，控制器會控制電磁閥斷氣，扳手停止工作，此時將無法再用力，從而避免過力。
2. Torque sensor type: when the torque value reaches the set torque value, the controller will control the solenoid valve to cut off the air and the wrench will stop working. At this time, it will not be able to exert any more force, so as to avoid excessive force.
氣動扭力扳手中，油壓脈沖式因其無反作用力而受到很多人的青睞，但不適合用來打軟連接螺栓。
Among pneumatic torque wrenches, oil pressure pulse type is favored by many people because of its no reaction force, but it is not suitable for soft connecting bolts.
