Structure and working principle of torque wrench

1.扭矩扳手結(jié)構(gòu)

1. Torque wrench structure

目前常用的扭矩扳手多為棘輪扭矩扳手及插口扭矩扳手，此類扳手主要由扭矩主彈簧、扭矩調(diào)整機(jī)構(gòu)、鎖止機(jī)構(gòu)、驅(qū)動(dòng)方頭、棘輪、扳頭外殼以及手柄等組成，所示。扭矩主彈簧作為扭矩扳手的核心零部件，提供扭矩扳手的力矩，通過改變扭矩珠彈簧受壓狀態(tài)而實(shí)現(xiàn)改變所需力矩的大小，其自身精度為。一般用在零部件裝配完畢后，用于校準(zhǔn)螺栓、螺母的擰緊狀況，以達(dá)到螺栓、螺母規(guī)定的工藝扭矩要求。

At present, most commonly used torque wrenches are ratchet torque wrenches and socket torque wrenches. These wrenches are mainly composed of torque main spring, torque adjusting mechanism, locking mechanism, driving square head, ratchet, wrench housing and handle, as shown in. As the core component of the torque wrench, the torque master spring provides the torque of the torque wrench. The required torque can be changed by changing the compression state of the torque bead spring. Its own accuracy is. It is generally used to calibrate the tightening condition of bolts and nuts after the parts are assembled, so as to meet the specified process torque requirements of bolts and nuts.

2.扭矩扳手工作原理

2. Working principle of torque wrench

對(duì)扭矩扳手設(shè)置扭矩，即調(diào)整了扭矩扳手的彈簧力，使用扭矩扳手刻打扭矩時(shí)，將扭矩扳手頭部與螺栓相連，對(duì)螺栓施加扭矩，由于螺栓對(duì)扳手的反作用力尚未達(dá)到彈簧彈力，螺栓會(huì)持續(xù)緊固，待螺栓緊固力達(dá)到設(shè)定的扭矩時(shí)會(huì)推動(dòng)頂推器，棘輪開始工作，頭部就以頭部定位銷為旋轉(zhuǎn)，頭部的尾端接觸到套管就發(fā)出“咔嗒”響聲，說明螺栓緊固力已達(dá)到設(shè)定的扳手力。

Set the torque for the torque wrench, that is, adjust the spring force of the torque wrench. When using the torque wrench to carve the torque, connect the head of the torque wrench to the bolt and apply the torque to the bolt. Since the reaction force of the bolt to the wrench has not yet reached the spring force, the bolt will continue to tighten. When the bolt tightening force reaches the set torque, the ejector will be pushed, the ratchet will start to work, and the head will rotate around the head positioning pin, The tail end of the head makes a "click" sound when it contacts the sleeve, indicating that the bolt tightening force has reached the set wrench force.

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