A spring is a mechanical part that uses elasticity to work. Generally made of spring steel. It is used to control the movement of machine parts, mitigate shock or vibration, store energy, measure the magnitude of force, etc., and is widely used in machines and meters. The types of springs are complex and diverse, divided according to shape, mainly including coil springs, spiral springs, leaf springs.
Here are the main functions of the spring:
(1) Control the movement of machinery, such as valve springs in internal combustion engines, control springs in clutches, etc.
(2) Absorb vibration and impact energy, such as buffer springs under cars and train cars, vibration-absorbing springs in couplings, etc.
(3) Store and output energy as power, such as clock springs, springs in firearms, etc.
(4) Used as a force-measuring element, such as force-measuring device, spring in spring scale, etc. The ratio of spring load to deformation is called spring stiffness. The greater the stiffness, the harder the spring.
The spring is a kind of elastic element widely used in the mechanical and electronic industries. The spring can produce large elastic deformation when loaded, which converts mechanical work or kinetic energy into deformation energy. After unloading, the deformation of the spring disappears and returns to its original state. Deformation energy is converted into mechanical work or kinetic energy.
We know that within the limit of elasticity, the extension (or contraction) of the spring is proportional to the external force. The spring scale is made using the nature of the spring.
Observation of various electrical switches reveals that one of the two contacts of the switch must be equipped with a spring to ensure that the two contacts are in close contact and good continuity. If the contact is not good, the resistance at the contact will increase, the heat generated when the current passes will increase, and in severe cases, the metal at the contact will melt. The two metal posts of the bayonet lamp cap are equipped with springs for good contact; as for the central metal plate of the screw cap and all the plug metal plates of the sockets are reeds, their function is to make the two sides closely contact to maintain Same good.
In the cassette tape, there is a phosphor bronze reed, and the elastic force generated when it is bent and deformed is used to bring the magnetic head into close contact with the magnetic tape. There is a long coil spring in the stapler. On the one hand, it functions to tighten the staples. On the other hand, when the front nail is pushed out, the rear nail can be sent to the front to prepare the nail to be pushed out comfortably. In this way, you can automatically push the nails to the front until all the nails are pushed out. Many machines feed automatically, and the automatic loading of bullets in automatic rifles relies on the function of springs. In addition, clips like clothes clips, ballpoint pens, and pen clips are all clamped on clothes by the pressing function of a spring.
The spring is deformed under the action of external force. After removing the external force, the spring can be restored to its state. Many tools and equipment are reset using the nature of springs. For example, the hinges of many building gates are equipped with return springs. When people enter and exit, the doors will automatically reset. People also use this function to make automatic umbrellas, automatic pencils and other supplies, which is very convenient. In addition, various buttons and keys are indispensable for the return spring.