Definition and introduction of hand tool wrench

Update:18-11-2021
Summary:

The definition of a wrench is a hand tool that uses the […]

The definition of a wrench is a hand tool that uses the principle of leverage to twist bolts, screws, nuts, and other threaded fasteners. Wrenches are usually provided with openings or sleeve holes for holding bolts or nuts at one or both ends of the handle. When in use, an external force is applied to the handle along the thread rotation direction, and the bolt or nut can be twisted.
Introduction of Wrench Wrench is a commonly used installation and removal tool. Use the principle of leverage to twist bolts, screws, nuts, and other threaded hand tools that hold the openings of bolts or nuts or sets of holes.
There are basically two types of wrenches, dead wrenches and adjustable wrenches
The former refers to wrenches that already have a fixed size, and the latter refers to adjustable wrenches that can accommodate multiple sizes.
The working principle of ratchet wrench
When the driving member rocker swings counterclockwise, the driving pawl is inserted into the tooth groove of the ratchet wheel, and the ratchet wheel is pushed to rotate through an angle. At this time, the stop pawl slides on the tooth back of the ratchet wheel. When the driving member rocker swings clockwise, the stop pawl prevents the ratchet from rotating in the clockwise direction, while the driving pawl can slide on the back of the ratchet tooth, so the ratchet is stationary. In this way, when the rocker makes continuous reciprocating swing, the ratchet will make a one-way intermittent movement. Among them, the reciprocating swing of the driving member can be obtained by a cam mechanism of a swing follower, a crank rocker mechanism, or a hydraulic transmission and an electromagnetic device.

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