Drive classification knowledge of gear reducer

Gear reducer drives include standard gear drives, height shift gear drives and angular shift gear drives. The main purpose of classifying the gear reducer in this way is to avoid undercutting to reduce the size and weight of the mechanism, in order to improve the wear of the gear pair and to improve the load carrying capacity of the gear reducer.

In general, gear reducers utilize mechanical transmission of power and moving parts. The mechanical transmission of gear reducers is widely used in mechanical engineering. There are many forms, which can be divided into two categories:

The first one is the friction transmission that transmits power and motion by the friction between the gear reducer and the machine, including belt drive, rope drive and friction wheel drive.

The friction transmission of the gear reducer is easy to realize stepless speed change, and it can adapt to the transmission occasion with large shaft spacing. The overload slip can also play the role of buffering and protecting the transmission device. However, the gear reducer adopting this transmission method cannot generally be used. In the case of high power, accurate transmission ratio cannot be guaranteed.

Secondly, the meshing transmission, such as gear transmission, chain transmission, screw transmission and harmonic transmission, is carried out by the active member of the gear reducer engaging with the driven member or engaging with the intermediate member to transmit power or movement.

The gear reducer adopting the meshing transmission mode can be used for high-power occasions, and the transmission is relatively accurate, but generally requires high manufacturing precision and installation accuracy, and the reliability of the gear reducer.

The gear ratio of the gear reducer is very important, because the size of the gear ratio is related to the gear speed. The main research task of the gear mechanism of the gear reducer is to obtain the gear ratio and the angular velocity of each basic component according to the transmission diagram, or according to The gear ratio is determined to determine the number of teeth of each gear of the gear reducer.

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