The full name spiral torsion springs, referred to as torsion springs.
Many mechanical components require the springs that creates a torque. The spiral torsion springs meet this need. The appearance of the springs is similar to the spiral compression or extension springs. They are all made of wire coils. Usually the coil of the torsion spring is closely attached to it, but with a small gap to each other to avoid the initial tension used to stretch the spring that is not needed.
The installation of torsion springs requires 3 or more support points. They are often sleeved on the rod to facilitate positioning and transmit the counter stress to the structure. The diameter of the rod is approximately within the maximum load of the springs. 90% of the diameter. The most common types are single torsion springs and double torsion springs. Torsion springs are elastic objects that store mechanical energy. Once twisted by an external force, a torsion force proportional to the twisting angle will be applied in the opposite direction.
Torsion springs are widely used in various industries. For example, pins use torsion springs to provide holding power. Many cabinet doors can be closed automatically by torsion springs. Some timers and switches use a torsion spring to make a clockwork to create a passage. Torsion springs also often provide a counterbalance on the hinge.
Applying the characteristics of its torsion load, this kind of springs are usually tightly wound. When the outer diameter of the coil decreases with the deflection angle, the leg length will become longer. The designer needs to consider that the friction and the leg length change must be considered for the twisting tool. Torsion springs have different shapes due to the different environments in which they are used, and can be roughly divided into single torsion springs and double torsion springs:
