Variable force springs are widely used in various industrial applications such as aerospace, automotive, medical equipment, and many more. These springs are designed to provide varying force output over its travel range. They are also known as constant force springs or clock springs.
In this article, we will discuss the working principle, advantages, and applications of variable force springs.
Working Principle
Variable force springs work on the principle of constant torque output. They are made of a strip of material wound in a spiral shape. The strip is formed into a coil with the inner end connected to the shaft or core and the outer end attached to the housing or any other fixed point.
When these springs are extended or retracted, the strip uncoils or recoils, respectively. The coiling of the strip generates a torque that remains constant throughout the entire travel range of the spring. This torque output is responsible for the varying force output of the spring.
Advantages
Variable force springs have several advantages over conventional springs. Some of the significant advantages are:
1. Constant force output: Variable force springs provide a constant force output over their entire travel range. This makes them ideal for applications where a consistent force is required.
2. Long life: These springs have a long life as they are made from high-quality materials that are resistant to wear and tear.
3. High reliability: Variable force springs are highly reliable as they can withstand high temperatures, shock, and vibration.
4. Compact design: These springs have a compact design, making them ideal for applications where space is limited.
Applications
Variable force springs find applications in various industries. Some of the significant applications are:
1. Aerospace: These springs are used in aerospace applications such as thrust reversers, flap systems, and cargo doors.
2. Automotive: Variable force springs are used in automotive applications such as seat belts, retractable roofs, and power windows.
3. Medical equipment: These springs are used in medical equipment such as surgical instruments, dental braces, and prosthetics.
4. Robotics: Variable force springs are used in robotics applications such as grippers, robotic arms, and pick and place systems.
Conclusion
Variable force springs are an essential component in various industrial applications. They provide a constant force output over their entire travel range, making them ideal for applications where a consistent force is required. These springs have several advantages such as long life, high reliability, and compact design. They find applications in aerospace, automotive, medical equipment, and robotics industries.
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