In the reducer industry, NuoH precision gear with its quiet high precision high rigidity and high torque no lubricating oil leakage, and many other advantages, is widely applied to step dc servo drive system etc Its role is on the premise of guarantee precision transmission, mainly used to reduce speed increase torque and lower than the rotational inertia of the load/motor In the past few years, some users in the use of reducer, due to illegal installation and other human factors, and lead to the output shaft of reducer broken, so that the enterprise suffered unnecessary losses Therefore, in order to better help the general users with Nuohong precision gear reducer, this paper analyzes the reasons for the reducer and drive motor shaft broken, and describes in detail how to correctly install the planet reducer.

a: different heart broken shaft problem some users in the equipment run a few months after the output shaft of the drive motor broken,

Why did the reducer twist the output shaft of the drive motor? 

For this reason, we looked at the cross section of the output shaft of the driving motor and found that the cross section of the output shaft of the reducer was almost exactly the same. The outer ring of the cross section is brighter, and the more to the axis of the section color is darker, and finally to the axis is broken! This fully shows that the main reason for the broken shaft of the output shaft of the driving motor is that the motor and the reducer are assembled in different centers. When the concentricity of the assembly between the motor and the reducer is guaranteed to be very good, the motor output bearing is only subjected to the rotation power, and the operation will be very smooth. Then when the different center, the output shaft should bear the radial force from the input end of the reducer. The long-term effect of the radial force will make the output shaft of the motor be forced to bend, and the direction of bending changes constantly with the rotation of the output shaft. Every rotation of the output shaft, the direction of the transverse force changes 360 degrees. If the concentricity error is large, the radial force will raise the temperature of the output shaft of the motor, and its metal structure will be continuously damaged. Finally, the radial force will exceed the radial force that the output shaft of the motor can bear, and finally lead to the output shaft of the driving motor breaking. When the concentricity error is greater, the output shaft of the driving motor is broken at the same time, the input end of the reducer will also bear the radial force from the motor. If the radial force exceeds the larger radial load that the two can bear at the same time, the result will also lead to the deformation and even fracture of the input end of the reducer. Therefore, it is very important to ensure concentricity in assembly! Intuitively speaking, if the motor shaft and the reducer input end concentric, then the motor and the reducer will be closely matched, the contact surface between them is closely connected, and if the assembly is different, then there will be a gap between the contact surface between them. Similarly, the output shaft of the reducer is broken or bent, and the reason is the same as the broken shaft of the driving motor. But the output of the reducer is the product of driving motor output and deceleration ratio, relative to the motor output is larger, so the output shaft of the reducer is more likely to be broken. Therefore, the user should pay attention to the concentricity of the output assembly when using the reducer.

b: reducer output too small broken shaft problem in addition to the reducer output end assembly concentricity is not good, caused by the reducer broken shaft, reducer output shaft if broken, nothing more than the following reasons.

First of all, the wrong selection of reducer resulting in insufficient output. Some users in the selection, mistakenly think that as long as the rated output torque of the selected reducer meets the working requirements, in fact, it is not, one is the rated output torque of the motor multiplied by the reduction ratio, the value obtained in principle is less than the rated output torque of the similar reducer provided by the product sample, Second, it should also consider the overload capacity of the driving motor and the greater working torque required in practice. In theory, the user needs more working torque. It must be less than 2 times the rated output torque of the reducer. In particular, some applications must strictly abide by this criterion, which is not only to protect the reducer, but also to avoid the output shaft of the reducer is twisted off. This is mainly because, if the equipment is installed with problems, the output shaft of the reducer and its load is stuck, then the overload capacity of the driving motor will still make it constantly increase output, and then, the force of the output bearing of the reducer may exceed 2 times its rated output torque and twist the output shaft of the reducer. Secondly, in the process of acceleration and deceleration, the output shaft of the reducer by instantaneous torque if more than 2 times its rated output torque, and this acceleration and deceleration is too frequent, then eventually will make the reducer shaft broken. Considering that this kind of situation occurs rarely, it will not be further described here.

c: the correct installation, use and maintenance of reducer is an important link to ensure the normal operation of mechanical equipment. Therefore, when you install Nuohong precision tooth planetary reducer, please be sure to strictly follow the following installation and use related matters, carefully assembly and use.

First of all, before installation, confirm whether the motor and reducer are intact, and strictly check whether the size of each part connected with the motor and reducer is matched. Here is the size and tolerance of the positioning boss, input shaft and reducer groove of the motor.

The second step is to unscrew the screw on the outer dustproof hole of the reducer flange, adjust the clamping ring to align the side hole with the dustproof hole, and insert the inner hexagon to tighten. After that, the motor shaft key is removed.

The third step is to connect the motor with the reducer naturally. When connecting, it must be ensured that the output shaft of reducer and the input shaft of motor have the same concentricity, and the outer flanges of the two are parallel. If the concentricity is inconsistent, the motor shaft will be broken or the gear of the reducer will be worn. In addition, in the installation, it is strictly prohibited to hit with a hammer to prevent axial force or radial force too large damage to bearings or gears. Be sure to tighten the mounting bolts before tightening the force bolts. Before installation, the motor input shaft, positioning boss and reducer connection part of the anti-rust oil with gasoline or zinc sodium water wipe clean. The purpose is to ensure tight connection and flexibility of operation, and to prevent unnecessary wear. Before connecting the motor with the reducer, please first put the motor shaft keyway perpendicular to the tightening bolt. To ensure even force, screw the installation bolts in any diagonal position first, but not tightly, then screw the other two diagonal installation bolts and finally tighten the four installation bolts one by one. Screw the force bolt. All tightening bolts shall be fixed and inspected by torque wrench according to fixed torsional torque data indicated. The correct installation of reducer and mechanical equipment is similar to the correct installation of reducer and driving motor. The key is to ensure that the output shaft of the reducer and the driving part of the shaft concentricity is consistent.