How are extension springs different from other springs?

　　Many items on the market will use extension springs. There are three types of extension springs: extension springs, tension springs, and extension springs. A tension spring is a helical spring that withstands axial tension, and a tension spring is made of circular cross-section materials. It is made, when no tension is received, the circle and circle of the tension spring are tight and there is no gap.

　　1. What is the difference between a tension spring and other springs?

　　(1) The difference between the extension spring and other springs is that its two ends are made of hooks. The hooks of the extension spring are used to ensure the source of tension for the extension spring. The working principles of the extension spring and the compression spring are completely different. The difference is that compression springs react when they compress, and tension springs react in reverse when they are pulled apart or extended. When the ends of an extension spring are pulled apart, the spring tries to pull them back.

　　2. What field is the extension spring used in?

　　(1) The application of the tension spring includes the inner and outer sides of the motor vehicle, production assembly, experiment, research and development, maintenance, etc. The tension spring occupies an important position in the market and is used in defense, marine, computer, electronics, automobile, mold, medicine, biochemistry, aerospace, railway, nuclear power, wind power, thermal power, construction machinery, mining machinery, construction machinery, elevators and other fields.

　　3. What are the types of closures for making extension springs?

　　(1) Threaded embedded cuff, cross center pull ring, pull hook, enlarged small hole, reduced small hole, rectangular cuff and teardrop-shaped cuff, the length of cuff from the spring body can be determined according to the specific situation and can be customized in the design When stretching the spring, the length of the hooks at both ends of the spring can be adjusted to meet the load requirements of the stretched position.

　　4. What are the different extension springs?

　　(1) Another common extension spring is the hook spring. For the hook spring, the long steel ring passes through the center of the spring and is loaded at the end that is hooked at the other end. The hook spring is suitable for potential The overloaded working environment of the spring, and the spring has an inherent braking function, which ensures that the spring can continue to carry the static load when it reaches the large extension length, and the hook spring is often used to support the porch swing.

　　5. What parameters are required for extension spring design?

　　(1) Dimensions: outer diameter, inner diameter, spring wire diameter, stretched length and free length

　　(2) The stretched length refers to the length of the spring in a large stretched state

　　(3) Free length refers to the total length of the spring under no load

　　(4) Spring stiffness and large load

　　(5) Spring stiffness refers to the change in load per unit of deformation.

　　(6) Large load refers to the load carried by the spring when it is in a large tension state.

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