In mechanical design, a problem often encountered: how to tighten a small nut? Today let's talk about the most basic method of fixing nuts at work.
1. Flatten the washer
Washer refers to the part between the connected part and the nut. It is generally a flat metal ring, which is used to protect the surface of the connected part from being scratched by the nut, and to disperse the pressure of the nut on the connected part.
2. Flat washers and spring washers
Spring washers are widely used in load-bearing and non-load-bearing structures of general mechanical products. They are characterized by low cost and easy installation, and are suitable for parts that are frequently assembled and disassembled. However, the anti-loosening ability of spring washers is very low.
3. Self-locking nut
Ordinary nuts will loosen by themselves due to vibration and other reasons during use, such as vibration. In order to prevent this phenomenon, self-locking nuts were invented. The function of the self-locking nut is mainly anti-loosening and anti-vibration, which is used for special occasions. Its working principle is generally self-locking by friction. According to the function, self-locking nuts are divided into those with embedded nylon rings, those with neck closures and those with metal anti-loosening devices, all of which are effective torque type anti-loosening nuts.
Self-locking nuts are difficult to screw due to their nature.
4. Nut lock fluid
Apply nut anti-loosening liquid to the tightened part of the bolt, and then screw on the nut to achieve the effect of anti-loosening.
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5. Double nuts (left and right rotation) anti-loosening
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It is also a good method to tighten and prevent loosening by cooperating with a left-handed nut and a right-handed nut.
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6. Screws and nuts are drilled and fixed with pins
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In machinery, pins are mainly used for assembly positioning, and can also be used as overload shear connections in connection and relaxation level safety devices. Pin types include cylindrical pins, tapered pins, eyelet pins, cotter pins, and safety pins, among others.
