About Electric Desk Self-locking Force
Electric desk self-locking force is a very important attribute. It comes from the electric linear actuator in the desk leg. So, what is self-locking force? What does it do, and how does it affect the quality of electric desk legs?
What does self-locking force mean?
The meaning of self-locking is that the screw nut and the screw cannot move without external force, so the self-locking force is also called static load capacity. So, what is the force that the electric desk legs can withstand when they remain stationary?
Self-locking force can be divided into 4 levels:
Self-locking coefficient less than 0.35.
When stationary without vibration, the linear actuator is stationary under external tension/pressure.
2. Dynamic self-locking
Self-locking coefficient less than 0.3
– When the force on the linear actuator is opposite to the direction of motion, the self-locking coefficient is less than 0.25.
– When the linear actuator is subjected to force in the same direction as the direction of motion, there is no motion when the motor is powered off.
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3. Uncertain self-locking
Self-locking coefficient is between 0.35 and 0.55
The linear actuator will move up and down under the increasing external force
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4. No self-locking
Self-locking coefficient is greater than 0.55
Linear actuator can move up and down with a small external force.
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What is the use of self-locking force for electric desk?
1. The electric desk legs can withstand the greater pressure and not retract when it stops operating.
2. If power failure in the process, the electric desk legs will automatically lock, so as to effectively avoid harm.
What is the effect of insufficient self-locking force?
When the self-locking force of the electric desk legs is not enough to exceed its load, it will not only cause the overall frame to be unstable, but may also cause the table top to keep slipping. Motors may be damaged and even threatening the personal safety of the user.
How to ensure the self-locking force?
The self-locking ability of electric actuators is related to their gearbox structure, screw style, brakes, etc. Generally speaking, the slower the speed, the greater the self-locking force. (It can be seen that the lifting speed of the electric table legs is not as fast as possible) If the actuator slips, need to add extra brake spring.
In addition, the self-locking force differs from screw rod style.
The ball screw driving efficient is beetter, but there is almost no self-locking force. Its static load capacity is much weak when it is power off.
The trapezoidal screw is less efficient, but has a much stronger self-locking force. It is worth mentioning that different self-locking forces can be obtained by changing the size of the lead angle and the roughness of the working surface.
The self-locking force of an electric desk leg is not a fixed value. It varies with the different of screw, speed, load ratio, brake, etc.
The self-locking force required for the application is also related to the way the electric actuator is installed and the environment in which it is used, such as the angle of installation.
It should calculate the amount of self-locking force required by the electric desk legs in use, and then further consider how the product can achieve the required self-locking force. Because a larger self-locking force also means a larger resistance, making the efficiency lower and increasing energy consumption.
Timoek specialized in?electric standing desk frame?manufactured, the R&D team and the workshop have adjusted the process of the trapezoidal screw rod, to achieve the expected performance and sufficient self-locking force, while keeping the cost to a minimum.
This is a short article but may be useful to you. Hope the expression is clear in English, thank you!