German cohn springs cohn models cohn prices

cohn springs consist of tension springs and connecting springs. The pitch and helix direction of the tension spring and the connecting spring are identical. A special fixture is used to clamp one end of the tension spring and screw it into the connecting spring. The other end of the tension spring is then rotated and fitted onto the other end of the connecting spring. Rotational force is used to screw the connecting spring into the interior of the tension spring, forming a ring spring. This utility model ring spring does not affect the shape and elasticity of the connection point and provides a secure connection for various applications requiring ring springs. The ring spring is composed of alternating stacked washer-shaped spring steel discs with inner conical and outer cylindrical surfaces and washer-shaped spring steel discs with inner cylindrical and outer conical surfaces. The number of pairs of inner and outer rings in the ring spring is determined by the magnitude of the load it bears and the required deformation. Ring springs are used in applications with limited space that require strong buffering.

cohn spring structure

The torsion bar spring itself is a torsion bar made of spring steel. The cross-section of the torsion bar is usually circular, with fewer instances being tubular or rectangular. The ends can be shaped as splines, squares, hexagons, or cylindrical with flat surfaces, allowing one end to be fixed to the vehicle frame and the other to the suspension arm, which is connected to the wheel.

cohn spring structure classification

Based on the nature of the force, springs can be classified into tension springs, compression springs, torsion springs, and bending springs. Based on shape, they can be classified into disc springs, ring springs, leaf springs, helical springs, truncated conical volute springs, and torsion bar springs. Based on the manufacturing process, they can be classified into cold-coiled springs and hot-coiled springs. Ordinary cylindrical springs are widely used due to their simple manufacturing process, simple structure, and ability to be made into various forms according to loading conditions. Spring manufacturing materials should generally have high elastic limits, fatigue limits, impact toughness, and good heat treatment performance. Commonly used materials include carbon spring steel, alloy spring steel, stainless spring steel, copper alloys, nickel alloys, and rubber. Spring manufacturing methods include cold coiling and hot coiling. Spring wire diameters less than 8 mm are generally cold-coiled, while those greater than 8 mm are hot-coiled. Some springs undergo strong pressure or shot peening treatment after manufacturing to improve their load-bearing capacity.

cohn spring functions and applications

Functions: 1) Measurement function: We know that within the elastic limit, the extension (or contraction) of a spring is proportional to the external force. Spring scales are made using this property. 2) Clamping function: Observing various electrical switches reveals that one of the two contacts must have a spring installed to ensure tight contact between the two terminals for good conductivity. Poor contact increases resistance at the contact point, generating more heat when current passes through, which can severely melt the metal at the contact point. The two metal pins of bayonet lamp holders also have springs to ensure good contact. The center metal piece of screw-base lamp holders and all socket contact metal pieces are spring leaves, functioning to keep both sides in tight contact for good conductivity. In cassette tapes, a phosphor bronze spring leaf uses the elastic force generated by its bending deformation to keep the magnetic head in close contact with the tape. In staplers, a long helical spring serves to push the staples tightly and, after the frontmost staple is ejected, feeds the next staple to the front for smooth ejection, automatically pushing staples forward until they are all used. Many machines use this spring function for automatic feeding, such as automatic loading of bullets in automatic rifles. Additionally, clothespins, ballpoint pens, and pen cap clips utilize the clamping function of springs. Applications: 1) Supporting vehicle body weight: Most of the vehicle's weight is borne by the springs. 2) Dampening road bumps: Helical springs act as buffer elements. When impact forces from the road are transmitted to the helical spring via the wheels, the spring deforms, absorbing the kinetic energy of the wheels and converting it into potential energy of the spring, thereby mitigating the impact on the vehicle body. However, the helical spring itself does not consume energy; the spring storing potential energy will return to its original shape, converting the potential energy back into kinetic energy. If springs are used alone without damping elements, some light vehicles would bounce continuously like acrobats on a trampoline after a single impact. In automotive manufacturing, independent suspension axles are split into two sections, with each wheel independently mounted under the frame via a helical spring. When one wheel bounces, the other is unaffected, allowing independent movement of both wheels, which improves vehicle stability and comfort.

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