German tft springs tft models tft prices

tft springs, as elastic elements, are widely used in the suspensions of modern automobiles, including sedans, trucks, and off-road vehicles. Compared with leaf springs, torsion bar springs offer a series of advantages: high energy storage per unit mass, which reduces vehicle weight and saves material; since the torsion bar spring is fixed to the frame, it reduces unsprung mass, helping to improve ride smoothness; when applied to the front suspension of front-wheel-drive vehicles, the torsion bar spring can be arranged longitudinally, leaving space for the swinging half-shafts of the front drive axle. However, torsion bar manufacturing costs are relatively high, with strict requirements for materials and processes. In addition, torsion bar springs serve only as elastic elements and must have guiding mechanisms. Torsion bar springs are made of chromium-vanadium alloy spring steel, and their surfaces are very smooth after machining. During use, the surface of the torsion bar must be well protected. Typically, a layer of epoxy resin is applied to the surface of the torsion bar spring, wrapped with a layer of fiberglass cloth, coated with another layer of epoxy resin, and finally coated with asphalt and anti-rust paint to prevent collision, scratching, and corrosion, thereby extending the service life of the torsion bar spring.

tft spring installation and removal

Hydraulic hand pallet trucks are widely used in production. During maintenance of their pressure oil pumps, we found that the pressure spring responsible for returning the piston rod of the pressure oil pump and the pressure arm of the truck has a wire diameter of n and stores an elastic force of up to 1000N, making its installation and removal very difficult. This often delays fault elimination time, directly affecting production progress. Several measures were taken, but with poor results. Therefore, I designed a pressure spring installer/remover as shown in Figure 1. The installer/remover consists of a lower pressure rod 1, pressure blocks 10, connecting pins 14, nuts 1, spherical washers 12, upper pressure rod 13, positioning sleeves 16, and rods. During operation, rotate the nut 11 to an appropriate position so that the cylindrical head claws of the lower pressure rod 1 contact the vehicle body 2, and the two pressure blocks 10 press symmetrically on the washer 6. Rotate the compression nut n; through the tension rod 15, the upper pressure rod 13 and lower pressure rod 1 move relative to each other, forcing the pressure spring to compress. When the washer 6 leaves the cylindrical pin 7, the pressure wheel shaft 9, pressure wheel 8, and cylindrical pin 7 can be removed. At this point, loosen the nut 11, remove the installer/remover, take off the pressure spring, and proceed with disassembly, inspection, and maintenance of the pressure oil pump. The positioning sleeve 16 on the installer/remover is a key component; during manufacturing, one end has an inner spherical surface with a slot-shaped hole in the middle, and the other end has an inclined flat surface, forming an interference fit with the pressure rod. It is required to have good contact with the spherical washer 12 and the ball head of the rod 15. The pressure block 10 and connecting pin 14 have a clearance fit, requiring flexible rotation. The connecting pin 14 and upper pressure rod 13 have an interference fit. The connecting shaft 18 and pressure rod have a clearance fit.

tft spring features

1) Precise adjustment performance. That is, the relationship between force and displacement is very sensitive; 2) Good flexibility, meaning a relatively wide range of deformation; 3) Relatively easy to manufacture; 4) Compact structure; 5) High energy utilization rate. Example characteristics: Conical helical springs have good buffering performance and can withstand large loads. Volute helical 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, etc. Spring wire cross-sections include circular and rectangular shapes, with circular cross-sections being the most common. Helical springs, also known as torsion springs, are springs that undergo torsional deformation, and their working part is also closely wound into a helical shape. The end structure of torsion springs is processed into various shapes of torsion arms, rather than hooks or loops. Torsion springs are commonly used in balancing mechanisms in machinery and are widely applied in industrial production such as automobiles, machine tools, and electrical appliances.

tft spring applications

To a large extent, disc springs are replacing cylindrical helical springs. They are commonly used in heavy machinery (such as presses) and weapons like cannons and aircraft as strong buffering and vibration-damping springs, as clamping springs for automobile and tractor clutches and safety valves, and as energy storage elements for mobile devices. Disadvantage: Load deviation is difficult to guarantee. Disc springs can be divided into three categories based on cross-sectional shape: standard disc springs (with rectangular cross-sections), disc springs with radial grooves, and trapezoidal cross-section disc springs. Standard disc springs are divided into those with support surfaces and those without; disc springs with radial grooves are based on standard disc springs, with several uniformly distributed slots cut radially. The slots can be cut from the inner hole towards the outer circle, or from the outer circle towards the inner hole. Trapezoidal cross-section disc springs can be divided into two types: those with inner edge thickness greater than outer edge thickness, and those with inner edge thickness less than outer edge thickness. Since the deformation and load values of single-piece disc springs often cannot meet usage requirements, they can be used in groups to form disc spring assemblies (columns). Typical combination methods include: stacked combination disc springs, composite combination disc springs, and other combination disc springs. Compared with cylindrical helical springs, disc springs have the following characteristics: 1) The load-deformation characteristic curve exhibits a nonlinear relationship. 2) Disc springs are thin and easy to form assemblies, allowing for modular assembly and replacement, thus facilitating maintenance. 3) Disc springs with radial slots have zero stiffness characteristics. This characteristic can be applied in situations where the spring force is required to remain basically stable within a certain deformation range. 4) The vibration absorption performance of disc springs is no less than that of cylindrical helical springs. When using stacked combinations, the friction between disc spring plates provides greater damping, dissipating impact energy.

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