What is the difference between ratchet wrenches?

Update:21-01-2021
Summary:

The ratchet socket wrench is connected by the main torx […]

The ratchet socket wrench is connected by the main torx socket and the slave torx socket of different specifications and sizes through the female key and the male key of the hinged key. Because a plum blossom sleeve has two specifications of plum blossom-shaped through holes.

The movable trigger can easily adjust the use angle of the wrench. This kind of wrench is used for the tightening operation of screws, and has the characteristics of strong applicability, convenient use and low cost. China Turnbuckle Types 

Torque wrench-also called torque wrench or torque wrench. Torque is the product of force and distance. When tightening screws, bolts, nuts and other threaded fasteners, the applied torque needs to be controlled to ensure that the threads are tightened and not due to excessive torque. The thread is broken, so use a torque wrench to operate. First set an upper limit of the required torque value. When the applied torque reaches the set value, the wrench will make a "click" sound or the wrench connection will bend a little angle, which means that it has been tightened and no more force is required.

The difference is that the torque of the torque wrench can be set.

The principle of a torque wrench (torque wrench) making a click sound is very simple and can be divided into the following
Steps to understand:
1. After the torque wrench makes a "click" sound, it indicates that the torque value you requested has been reached [2];
2. The "Kata" issued by the torque wrench is produced by its internal torque release structure, which is divided into three structures: pressure spring, torque release joint, and torque ejector rod [2].

The principle of kata sound

First set the required torque value on the torque wrench (the spring is sleeved on the top rod to apply pressure to the torque release joint), lock the torque wrench, and start tightening the bolts. When the bolt reaches the torque value (when the torsion force is greater than the pressure of the spring), the effect of instantaneous disconnection will occur. At the moment when the disjointed effect is produced, the joints are knocked, and the metal shell of the wrench makes a "click" sound. This confirms the reminder function of reaching the torque value (actually, it is the same as the principle that our arm joints are bent at 15 degrees and placed in the iron pipe and then the steel pipe is immediately straightened).

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