Spring coil function

The coil spring is generally used as a power source for small-scale machinery, such as the timing power of mechanical clocks and the power of timing systems, without the need for electrical energy; The power of the rotation of a mechanical phonograph record; Mechanical music box; Automatic piano performance; The power of winding toys, and so on. The common feature of this type of coil spring powered machinery is that the transmission chain is a speed-up mechanism, not a commonly used reducer in machinery. In addition, the torque output by the coil spring is large when tightened, and when it is close to full relaxation, the output torque will decrease significantly. In order to reduce the uneven output torque of the spring, these devices all have a speed stabilizing mechanism, which is used to stabilize the speed of the mechanism. In mechanical watches, in order to reduce this torque difference, the spring is deliberately made to be in an S-shape when in free state, instead of a planar equidistant spiral shape, so that the output torque of the coil spring is relatively balanced
The design of the coil spring should determine the minimum driving torque and the maximum torque that can be used; The torque and speed of the final driving element; There are also factors such as the total driving time that need to be checked and selected from relevant design manuals. At the same time, the size of the spring box, the size of the gears, and the number of module teeth are determined. After conducting experiments, they are corrected and the parameters of each part are ultimately determined