​​​​​​​Understand the Backlash in Planetary Gear Reducers  

In some technical documents or communication documents of planetary reducers, we often see professional terms such as: backlash, torque, heat capacity, transmission ratio, moment of inertia, full load efficiency, etc. For example, the professional term backlash is quite unfamiliar to some friends who are in early contact or do not know much about planetary reducers.

Many friends do not know what the backlash of planetary reducers refers to? For this kind of The emergence of this phenomenon, the editor of Fubao Mechanical and Electrical Technology will take the backlash as an example to explain its meaning and impact.
 
Planetary reducer is a commonly used transmission device, and its performance directly affects the working efficiency and stability of mechanical equipment. The clearance and backlash of the planetary reducer have an important impact on the operation of the reducer.
 
First of all, clearance and backlash refer to the gaps and spacing between the internal components of the planetary reducer. The backlash of the planetary reducer is also called backlash and return clearance. The domestic definition is generally as follows: when the output end is fixed and the input end rotates clockwise and counterclockwise, so that the input end generates rated torque +-2% torque, There is a slight angular displacement at the input end of the reducer. And this angular displacement is the backlash.

Backlash is one of the accuracy indicators of the planetary reducer, which is generally expressed in arc minutes or angle minutes (1 arc minute is equal to one-sixtieth of one degree). The size of these gaps and spacing directly affects the transmission efficiency and accuracy of the reducer.

If the gap and backlash are too large, it will increase the energy loss during transmission, reduce the transmission efficiency, and also affect the accuracy and stability of the reducer. Therefore, reasonable control of the size of the gap and backlash is crucial to the normal operation of the reducer.
 
The interior of the planetary reducer is composed of one or more sets of gears to achieve the effect of reducing the speed and increasing the torque. The planetary reducer is no exception. This gap is the gap between the gears, which will be reflected during forward and reverse rotation. , the smaller the gap, the higher the accuracy.

The smaller the return clearance of the planetary reducer, the higher the accuracy and the higher the cost. If the mechanism itself has a light load and no need for reversal, backlash does not need to be considered. When precision applications such as forward and reverse rotation are required in robotics, automation or CNC, backlash is crucial for accuracy and positioning.
 
Secondly, the size of the gap and backlash also has an important impact on the noise and vibration of the reducer. Excessive clearance and backlash will lead to increased instability during transmission, resulting in greater vibration and noise. This will not only affect the service life of the reducer itself, but also have an impact on the surrounding environment and the health of the staff.

Therefore, reasonable control of the size of the gap and backlash can effectively reduce the noise and vibration of the reducer and improve its working efficiency and stability.
 
In addition, the size of the gap and backlash will also affect the service life of the reducer. Excessive clearance and backlash will cause increased friction between components during transmission, thereby accelerating wear and aging of components. This will shorten the service life of the reducer and increase the maintenance cost and replacement frequency of the equipment. Therefore, reasonable control of the size of the gap and backlash can effectively extend the service life of the reducer and reduce the maintenance cost of the equipment.
 
In summary, the clearance and backlash of the planetary reducer have an important impact on the operation of the reducer. Reasonable control of the size of the gap and backlash can improve the transmission efficiency and accuracy of the reducer, reduce noise and vibration, extend the service life, reduce maintenance costs, and ensure the normal operation of the equipment. Therefore, when designing and using planetary reducers, it is necessary to pay attention to the control of clearance and backlash to ensure that they are within a reasonable range to obtain the best working results.