German leppert springs leppert models leppert prices

leppert springs are energy accumulators; they store energy but cannot release it slowly. To achieve slow release, a "spring + high gear ratio mechanism" is required, commonly seen in mechanical watches. Helical springs have been applied since ancient times; bows and crossbows are two broad types of helical springs. By appearance, they can be divided into standard cylindrical helical springs and variable-diameter helical springs (see figure); by the direction of the helix, they can be divided into left-hand and right-hand springs. Cylindrical helical springs have a simple structure, are easy to manufacture, and are the most widely used. Their characteristic curve is linear, and they can serve as compression springs, extension springs, and torsion springs. When the load is heavy and radial dimensions are limited, two compression springs with different diameters can be nested to form a combination spring. Variable-diameter helical springs include conical helical springs, spiral torsion springs, and concave helical springs. Conical helical springs offer good buffering performance and can withstand large loads. Spiral torsion springs can store more energy and withstand larger loads, but the manufacturing process is more complex. The performance of concave helical springs is similar to that of conical helical springs, and they are mostly used in seat cushions and mattresses. Spring wire cross-sections include circular and rectangular shapes, with circular cross-sections being the most common.

leppert spring structure

A torsion bar spring itself is a torsion bar made of spring steel. The cross-section of the torsion bar is usually circular, with a few being tubular or rectangular. Its ends can be shaped as splines, square, hexagonal, or cylindrical with flats, so that one end can be fixed to the vehicle frame and the other end to the suspension arm, which is connected to the wheel.

leppert spring composition

A ring spring is a type of compression spring composed of several inner and outer rings with tapered surfaces. Under axial load P, significant normal pressure is generated between the contact surfaces of the inner and outer rings, causing the inner ring diameter to decrease and the outer ring diameter to increase. Due to this change in diameters, the spring shortens in length; when the external force is removed, since the cone angle b of the rings is greater than the friction angle, the spring restores its original dimensions under elastic internal forces. When a ring spring bears axial P, significant friction is generated between the tapered contact surfaces of the inner and outer rings, consuming a large amount of energy. At this time, the force and deformation remain in a linear relationship. During the loading process, the external force P equals the sum of the spring's internal force and friction. ABO represents the unloading process, which includes two stages: the AB segment and the BO segment. The AB segment indicates the situation where the load decreases, and the spring's elastic internal force overcomes static friction, gradually restoring the spring to its original state. The inner and outer rings of ring springs are made of high-quality carbon steel or wear-resistant alloy steel. Each ring is first roll-formed to the required shape to improve its load-bearing capacity, and then heat-treated. Ring springs are heavy-duty springs with significant buffering and shock-absorption capabilities (the ratio of area OABO to OACO can reach 60～70%). They are commonly used in buffering devices for heavy vehicles, artillery, and aircraft landing gear.

leppert spring features and applications

Features: Compared to standard compression or extension springs, their spring force is very constant, providing a nearly linear force output. This ensures that the product does not vary due to changes in spring force during use. In narrow and elongated spaces, space usage can be minimized as much as possible, enhancing possibilities for aesthetic product design. Constant force spring applications: lift fans, LCD monitors, sliding windows and doors, supermarket automatic checkout counters, motor brush holding devices, cables, stapler springs, power tools, car ashtrays, locomotive brush accessories, medical instruments, mobile phone holders, etc.

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