Electric torque wrench manufacturers believe that the design of torque sensors is crucial for the performance of electric wrenches. When the wrench head rotates, the strain gauge cannot be directly connected to the wrench head, otherwise the wire will wrap around the wrench head and roll off. If other shaft torque sensors are used, the wrench has a large volume, high cost, and low accuracy. Therefore, utilizing the characteristics of planetary gear structure, one end of the sensor elastomer is engaged with the low-speed gear ring through the gear teeth, and the other end is fixedly connected to the housing through a pin. Then, attach a strain gauge to the elastomer and feel the torque of the gear ring, converting the torque measurement of the rotating shaft into the torque measurement of the fixed shaft.

電動扭剪扳手廠家認(rèn)為電動扳手主要由微電腦控制系統(tǒng)、步進(jìn)電機(jī)、兩級行星齒輪機(jī)構(gòu)、外殼、扭矩傳感器、扳手頭等組成。步進(jìn)電機(jī)轉(zhuǎn)動時，帶動高速行星齒輪機(jī)構(gòu)的輪轉(zhuǎn)動，該機(jī)構(gòu)的另一個輪(齒圈)與殼體固定連接；扭矩通過拉桿傳遞給低速行星齒輪機(jī)構(gòu)的輪，機(jī)構(gòu)的另一個輪(齒圈)與傳感器連接，并通過傳感器固定在殼體上；同時，扭矩通過拉桿傳遞到扳手頭，擰緊螺栓。當(dāng)?shù)退傩行驱X輪機(jī)構(gòu)的齒圈(傳感器)與拉桿之間的扭矩關(guān)系確定后，通過監(jiān)測傳感器的扭矩值就可以間接測得扳手頭的扭矩。微電腦控制系統(tǒng)采集傳感器的扭矩信號，經(jīng)過處理后反饋給步進(jìn)電機(jī)，從而控制扳手的扭矩和速度。

Electric torque wrench manufacturers believe that electric wrenches are mainly composed of microcomputer control systems, stepper motors, two-stage planetary gear mechanisms, casings, torque sensors, wrench heads, etc. When the stepper motor rotates, it drives the center wheel of the high-speed planetary gear mechanism to rotate, and the other center wheel (gear ring) of the mechanism is fixedly connected to the housing; The torque is transmitted to the center wheel of the low-speed planetary gear mechanism through a pull rod, and the other center wheel (gear ring) of the mechanism is connected to the sensor and fixed on the housing through the sensor; At the same time, torque is transmitted to the wrench head through the pull rod to tighten the bolts. After the torque relationship between the gear ring (sensor) and the pull rod of the low-speed planetary gear mechanism is determined, the torque of the wrench head can be indirectly measured by monitoring the torque value of the sensor. The microcomputer control system collects torque signals from sensors, which are processed and fed back to the stepper motor to control the torque and speed of the wrench.

電動扭剪扳手廠家認(rèn)為電動扳手采用步進(jìn)電機(jī)和行星齒輪機(jī)構(gòu)，了動力傳遞和扭矩的動態(tài)檢測與控制問題。原理新穎，裝置可靠。扭矩傳感器靜態(tài)標(biāo)定結(jié)果表明，傳感器輸出穩(wěn)定，測量范圍內(nèi)靈敏度高，線性誤差和彈性滯后小，滿足設(shè)計精度要求。

The manufacturer of electric torque wrench believes that the electric wrench uses a stepper motor and planetary gear mechanism to solve the dynamic detection and control problems of power transmission and torque. The principle is novel and the device is reliable. The static calibration results of the torque sensor indicate that the sensor has stable output, high sensitivity within the measurement range, small linear error and elastic hysteresis, and meets the design accuracy requirements.

電動扭剪扳手廠家認(rèn)為在螺栓裝配中，為了保證螺栓連接的可靠性和疲勞強(qiáng)度，須適當(dāng)控制螺栓連接的預(yù)緊力，這在很大程度上取決于扳手?jǐn)Q緊力矩的控制。電動扭矩扳手采用步進(jìn)電機(jī)和行星齒輪驅(qū)動，克服了傳統(tǒng)氣動扳手轉(zhuǎn)速高、沖擊力大、扭矩不穩(wěn)定的缺點(diǎn)，能夠準(zhǔn)確監(jiān)測螺栓的擰緊扭矩。已成為鋼結(jié)構(gòu)等工程中不可缺少的電動工具之一。

Electric torque wrench manufacturers believe that in bolt assembly, in order to ensure the reliability and fatigue strength of bolt connections, it is necessary to appropriately control the pre tightening force of bolt connections, which largely depends on the control of the wrench tightening torque. The electric torque wrench is driven by a stepper motor and planetary gears, overcoming the shortcomings of traditional pneumatic wrenches such as high speed, high impact force, and unstable torque. It can accurately monitor the tightening torque of bolts. It has become one of the indispensable electric tools in steel structure and other engineering projects.

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