German krause sohn springs krause sohn models krause sohn prices

krause sohn springs are helical springs that withstand axial tensile force. Extension springs are generally manufactured from round cross-section material. When not under load, the coils of an extension spring are usually close-wound with no gap. Many different end fittings or "hooks" are used to ensure the tension source of the extension spring. The working principle of extension springs is opposite to that of compression springs. Compression springs exert a reactive force when compressed, whereas extension springs exert a reactive force when extended or pulled apart. When the ends of an extension spring are pulled apart, the spring attempts to pull them back together. Like compression springs, extension springs also absorb and store energy. However, unlike compression springs, most extension springs are typically under a certain degree of initial tension, even without any external load. This initial tension determines the tightness of the extension spring's coils when there is no load.

krause sohn spring principles

When leaf springs are installed in an automobile suspension and the vertical load is positive, each spring leaf deforms under stress, tending to arch upward. At this time, the axle and the frame move closer to each other. When the axle and frame move apart, the positive vertical load and deformation on the leaf spring gradually decrease, sometimes even reversing. The eye of the main leaf is heavily stressed and is a weak point. To improve the stress condition of the main leaf eye, the end of the second leaf is often bent into an eye that wraps around the outside of the main leaf eye, known as a wrap-around eye. A larger gap is left between the main leaf eye and the second leaf's wrap-around eye to allow for relative sliding during elastic deformation. In some suspensions, the ends of the leaf springs are not formed into eyes but use other support connection methods, such as rubber support pads. Flat rectangular steel plates are curved and stacked to form chassis springs. One end is mounted on the hanger with a pin, and the other end is connected to the main beam with a shackle, allowing the spring to expand and contract. This type is suitable for medium and large trucks. Automobile leaf springs are very important. As is well known, leaf springs are composed of many steel leaves that are elastic, have consistent width and thickness, but vary in length. Their function is to connect the frame and the axle in a suspended manner, exposed between the frame and the axle, bearing the load impact of the wheels on the frame, reducing severe vehicle vibration, and maintaining driving stability and adaptability to different road conditions. When leaf springs bear load impacts, they undergo extension motion, causing intense friction between the steel leaves, i.e., compression and tension phenomena. The two friction surfaces generate frictional forces in two different directions, causing the temperature of the leaf spring to rise, resulting in surface scoring and fine cracks. As the frequency of load impact increases, the frictional force generated by the extension motion also increases. When the stress concentration point reaches the fatigue limit, it will cause single-leaf or entire-stack fracture. Tests based on the principles of kinematics have proven that for a steel component undergoing compression-extension motion, as the motion frequency increases, the temperature of the steel component rises, strength decreases, cracks appear at stress concentration points and gradually expand and deepen, leading to damage upon reaching the fatigue limit. Leaf springs are similar, except they have higher elasticity and are more durable than general steel components. Apart from other causes, the main reason for leaf spring fracture is poor lubrication, which should be taken seriously by drivers and technical management personnel. Timely lubrication of leaf springs should be performed to reduce friction and disperse stress, prevent surface scoring of the steel leaves; reduce the intrusion of dust, dirt, and water to prevent corrosion; and dissipate heat to prevent a decrease in elastic strength. The general lubrication method is: perform lubrication after the new vehicle break-in period is complete, and during use in summer and winter. For lubrication, first remove the leaf spring, open the center bolt to separate the steel leaves, then evenly apply lithium-based grease or graphite grease to both sides of the steel leaves. After reassembly, an oil film is formed between the two friction surfaces (completing the lubrication of one set of leaf springs takes only the time required to replace one broken leaf).

krause sohn spring classification

1) Torsion springs: Torsion springs (torsional springs) utilize the principle of leverage. By twisting or rotating elastic materials that are soft and have high toughness, they store significant mechanical energy. These are springs that withstand torsional deformation; their working sections consist of coils that are either closely wound or spaced apart. The ends of torsion springs are processed into various shapes of torsion arms, ranging from single torsion to double torsion, and even various torsion bar deformations, all formed according to design requirements. Torsion springs are commonly used in balancing mechanisms in machinery and are widely applied in industrial production sectors such as automotive, machine tools, and electrical appliances. 2) Compression springs: Compression springs are helical springs that withstand axial compressive forces. Springs are generally classified into constant-pitch springs and variable-pitch springs. Shapes of compression springs include cylindrical, conical, convex, concave, and a small number of non-circular forms. There is a certain gap between the coils of a compression spring. When subjected to external loads, the spring contracts and deforms, storing strain energy. Variable-pitch springs are becoming increasingly common and are no longer limited to constant-pitch designs; variable-pitch springs can perform differently in various environments. 3) Carbon nanotube springs: The diameter of carbon nanotube springs can reach hundreds of micrometers, while their length can reach several centimeters. Their spun structure has broad application prospects, with potential uses in stretchable conductors, flexible electrodes, micro strain sensors, supercapacitors, integrated circuits, solar cells, field emission sources, and energy-dissipating fibers. This provides the possibility of preparing carbon nanotube electronic devices visible to the naked eye. They are also expected to be applied in medical devices, such as tension-sensing bandages. This novel structure can also be developed into multifunctional carbon nanotube fiber composites for utilization. 4) Extension springs: Extension springs (tension springs) are helical springs that withstand axial tensile forces. Extension springs are generally manufactured from round cross-section material. When not under load, the coils of an extension spring are usually close-wound with no gap. They work by utilizing the rebound force (tensile force) after stretching, used to control the movement of machine parts, store energy, measure force magnitude, etc., and are widely used in machines and instruments. Hook forms include side-hook extension springs, long-hook extension springs, British-style hook extension springs, German-style hook extension springs, semi-circular hook extension springs, duck-bill hook extension springs, etc. Materials include stainless steel, music wire, high-carbon steel, phosphor bronze, beryllium copper, and oil-tempered alloy spring steel. 5) Air springs: An air spring is a non-metallic spring that achieves elastic action by adding pressurized air into a flexible sealed container, utilizing the compressibility of air. It can be roughly divided into two types: bladder type and diaphragm type. Air springs have excellent elastic characteristics. When used in the suspension systems of high-end vehicles, they can significantly improve vehicle ride smoothness, thereby greatly enhancing operating comfort. Therefore, air springs are widely used in automobiles and railway locomotives. In addition, because air springs have many advantages compared to ordinary steel springs, they are also applied in some mechanical equipment and precision instruments.

krause sohn spring functions and applications

1) Reset function: Springs deform under external force and return to their original state when the external force is removed. Many tools and equipment utilize this property of springs for resetting. For example, reset springs are installed on the hinges of many building doors, so the door automatically resets after people enter or exit. People have also used this function to create convenient items such as automatic umbrellas and automatic pencils. In addition, various buttons and keys cannot do without reset springs. 2) Drive function: Mechanical clocks and wind-up toys are driven by tightening the mainspring. When the mainspring is tightened, it bends and deforms, storing a certain amount of elastic potential energy. Upon release, the elastic potential energy is converted into kinetic energy, driving rotation through the transmission device. Toy guns, starting pistols, and military firearms also operate using this property of springs. 3) Buffering function: Springs are installed between the locomotive/automobile frame and the wheels, utilizing the elasticity of the springs to reduce vehicle bumpiness. 4) Vibration and sound generation function: When air flows through the reed holes in harmonicas and accordions, it impacts the reeds, causing them to vibrate and produce sound.

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