There are various types of reducers available on the market, including cycloidal pinwheel reducers, vertical reducers, planetary reducers, and more. In the assembly application of planetary reducers and reduction motors, concentricity assembly accuracy is the core key to determining the operating status of the equipment and avoiding shaft breakage and damage.
When the concentricity assembly of the drive shaft of the reduction motor and the input end of the planetary reducer meets the standard, the drive output shaft only transmits pure torsional power, and the operation process is smooth and without any jamming or jerking feeling. The transmission process is smooth and there is no additional load.
If there is a deviation in the concentricity between the two, the device will generate additional radial forces on the output shaft during operation, in addition to the normal torsional force. The radial force will force the drive output shaft to undergo eccentric bending and rotation, and the larger the concentricity error, the greater the radial load, the faster the output shaft will break, and the higher the failure rate. Once the drive output shaft breaks, excessive radial force will exceed the bearing limit of the planetary gearbox input end, ultimately causing deformation and structural damage to the gearbox input end, leading to equipment failure.
From the perspective of assembly structure, when the concentricity between the drive shaft and the input end of the reducer is precise, the end face of the drive shaft can fully fit the input hole of the reducer without assembly clearance, and there will be no radial displacement or structural deformation. Concentricity deviation can cause gaps in the mating position, resulting in continuous eccentric deformation and alternating loads during operation, exacerbating shaft wear.
In addition, concentricity deviation not only causes damage to the motor drive shaft, but also leads to faults such as bending and fracture of the output shaft of the planetary gearbox. Due to the output torque of the planetary gearbox being the product of the motor driving force and the reduction ratio, the torque load at the output end is greater. Compared to the drive shaft, the output shaft of the planetary gearbox is more prone to breakage and deformation faults due to eccentric loads. Therefore, in the actual installation and use of planetary gearboxes, it is necessary to focus on controlling the concentricity accuracy of the shaft system, and avoid problems such as shaft breakage and equipment deformation and damage from the source.
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