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First of all, the servo motor does not necessarily have to be equipped with a planetary reducer. In addition to the characteristics of being able to withstand large loads, planetary reducers can also make the transmission accuracy particularly high, and the backlash accuracy of the output end can reach less than 1 point. Usually when the positioning accuracy requirements are not so high, it can be equipped with other reducers, helical gear reducers, bevel gear reducers K series, R series, F series, with low backlash option / R, transmission accuracy is also particularly high, general transmission accuracy requirements are no problem.


Reducer is a kind of transmission machinery with compact structure, large transmission ratio, and self-locking function under certain conditions, and it is easy to install, reasonable structure, and is more and more widely used. Common problems and their causes. 1) The reducer is heated and leaks, (2) the worm gear is worn, (3) the transmission small helical gear is worn, and (4) the bearing (at the worm) is damaged. 1. The reducer is hot and leaks. Reducer in order to improve efficiency, generally use non-ferrous metal as worm gear, worm is made of harder steel, because it is sliding friction transmission, in the process of operation, will produce higher heat, so that the reducer parts and seal thermal expansion difference, thereby producing gaps in each mating surface, and oil due to the increase of temperature thinner, easy to cause leakage. There are four main reasons, one is whether the material matching is reasonable, the second is the surface quality of the meshing friction surface, the third is the choice of lubricating oil, whether the amount of addition is correct, and the fourth is the assembly quality and use environment. 2. Worm gear wear. The worm gear is generally made of tin bronze, and the paired worm material is generally hardened to HRC45-55 with 45 steel, and 40C: hardened HRC50-55, ground to roughness RaO by worm grinder. 8 fcm, when the reducer is operating normally, the worm is like a hardened "file", constantly filing the worm gear, so that the worm gear wears. Generally speaking, this wear is very slow, like some reducers in a certain factory can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, the assembly quality or the use environment.


In addition to the broken shaft of the reducer caused by the poor concentricity of the assembly of the output end of the reducer, if the output shaft of the reducer is broken, it is nothing more than the following reasons. First of all, the wrong selection leads to insufficient output of the equipped reducer. Some users mistakenly think that as long as the rated output torque of the selected reducer meets the working requirements, in fact, it is not, first, the rated output torque of the equipped motor is multiplied by the reduction ratio, and the value obtained is in principle less than the rated output torque of the similar reducer provided by the product sample, and the second is to consider the overload capacity of the drive motor and the actual required working torque. Theoretically, the operating torque required by the user. It must be less than 2 times the rated output torque of the reducer. Especially in some applications, this criterion must be strictly observed, which not only protects the reducer, but also avoids the output shaft of the reducer being twisted off. This is mainly because, if there is a problem with the equipment installation, the output shaft of the reducer and its load are stuck, and the overload capacity of the drive motor will still make it continue to increase the output, and in turn, the output bearing of the reducer may be subjected to more than 2 times its rated output torque and the output shaft of the reducer may be torsqueed. Secondly, in the process of acceleration and deceleration, if the instantaneous torque of the output shaft of the reducer exceeds 2 times of its rated output torque, and this acceleration and deceleration are too frequent, it will also make the reducer break the shaft. Considering that this situation is rare, it will not be described further here.

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