Self-locking

Self-locking refers to the state in which a screw, wedge or gear remains in its position when no external force acts on it. This occurs due to the frictional forces between the contact surfaces, which prevent movement.

Importance of self-locking in mechanical engineering

In mechanical engineering, self-locking is crucial to prevent unwanted movements or backward movements of components. It ensures the stability and safety of mechanisms by ensuring that moving parts remain in position even when external forces are applied.

Mechanisms of self-inhibition

There are several mechanisms that cause self-locking:

1. Threaded spindles: Threaded connections where the friction angle is greater than the lead angle lead to self-locking. This prevents the spindle from moving without torque.
2. Wedge connections: Wedges use friction to hold components in place and prevent them from shifting under load.
3. Worm gears: Worm gears are often self-locking, as the friction between the worm and the gear prevents backward movement.

Application examples of self-locking

Self-locking is used in numerous applications, including:

• Lifting spindles: Used in lifting devices to hold loads in position.
• Brake mechanisms: In vehicles and machines to ensure that they do not roll or move unintentionally.
• Adjustable furniture: Mechanisms that prevent adjustable parts such as couches or tables from moving by themselves.

Advantages of self-locking

The use of self-locking mechanisms offers several advantages:

• Safety: Prevents uncontrolled movements and increases safety.
• Cost efficiency: Reduces the need for additional braking or holding systems.
• Energy saving: Does not require continuous application of force to hold positions.