Power Spring

Power spring refers to a steel strip that has been curled once or twice and is installed in a fixed box, and then connected through an arbor to tighten it to a predetermined position. After releasing the pre-tightening force when necessary, use the coil spring to A rotating spring, also known as a clockwork, uses the rebound power of a tight steel belt to achieve the design purpose.

Advantages: Because it is designed for rotation, it can be widely used in circular design devices and forms a coaxial design with the take-up device, which is very space-saving. With good design, its maximum service life can reach 300,000 times.

Disadvantages: Because it is used for rotation, its torque value cannot be uniform during the rebound stroke, showing a situation of weak front and strong back. Although it cannot meet the design requirements if balanced torque front and rear is required, the curve is as follows:

Application of power spring

1. Take-up box

Cord collection boxes are widely used to store the power cords of small household appliances such as irons, hair dryers, vacuum cleaners, and rice cookers. As users become more and more picky about the appearance of home appliances, the exposed power cords cause dirt, damage, and difficulty. Problems such as placement have always been unsatisfactory, but after using the wire collection device, the wires are completely stored in the internal space after use, and these problems are solved. The core component is the use of power springs.

2. Car seat belts

In the current automobile market, almost all cars use different designs and different numbers of safety devices, including active safety devices and passive safety devices. The two main types of passive safety devices are airbags and seat belts. Among them, the seat belt is mandated by all countries, so the seat belt is the most commonly used safety protection device in automobiles. The webbing recovery of the seat belt completely relies on the torque output of the power spring. The well-designed power spring gives full play to its extra long service life and extremely low torque attenuation rate are the absolute guarantee that the seat belt can be used normally for a long time.

3. Engine starting devices

Widely used in starting devices of engines such as yachts, lawn mowers, and chain saws.

4. Sports equipment

In order to cater to the increasingly stringent requirements of neatness and beauty, table tennis nets have adopted a network cable recycling design. Using a double power spring design, the network cable can be perfectly collected into the cable box. In order to improve the service life requirements, arm strength training equipment has also begun to adopt the design of power springs to make it more beautiful and durable.

5. Dog leash and isolation webbing recovery devices

For those who like to walk their dogs, if you use a dog walker with a webbing recovery device, you no longer have to worry about the long dog leash being dragged dirty on the ground, and by choosing products with different torques, they can be applied to different weights. type of dog. The isolation belts used in public places such as banks and post offices use a large number of different types of power springs.

3. power spring design

Parameters that must be provided for power spring design:

1. Installation box inner diameter (D)

2. Diameter of intermediate mandrel (d)

3. Torque value (T)

4. Range of use (Nx～Ny)

5. Service life requirements

6. Product torque calculation: It must be calculated through special software, please contact us.

7. Calculation of product life: it must be calculated through special software, please contact us.