Classification and function of couplings:
1. According to the structural form of the coupling, it can be divided into integral type, separated type, and flexible coupling with elastic elements.
2. According to the nature of work, it can be divided into two types: general type and special type.
Universal type for transmitting torque, such as universal joints, crosshead pins, etc; Special types are used to transmit angular displacement, such as diaphragm couplings, quincunx shaped elastic connecting blocks, etc.
3. According to its use and characteristics, it can also be divided into the following categories
(1) Rigid connection (commonly used).
(2) Flexible connection (commonly used in low speed and heavy load conditions).
(3) Semiflexible and gapless connections (commonly used in high speed and light load conditions).
(4) Rubber tire type coupling device with cushioning and vibration reduction capabilities.
(5) Use new materials or newly manufactured special non-metallic elastic elements for flexible connecting transmission parts.
(6) Other types: such as roller chain wheel sets, slider chain transmission mechanisms, etc.
The function of the coupling:
The machinery that connects two parts of different mechanisms is called a transmission, Also known as force transmission, commonly used in machinery include belt drives, gear rack and pinion gear reducers, and belt and chain combined conveyors. The most widely used types are gear rack and pinion gear reducers and belt conveyors. They both operate by meshing two or more pairs of different gears to reduce rotational speed and increase torque to drive the load. Because this type of reducer usually consists of a pair of dual gears forming a relative rotational axis Parallel inclined planes are used to achieve speed change, so they are referred to as parallel axis speed reduction motors or simply parallel axis motors
The advantages of parallel axis motors are compact structure, small size, light weight, high efficiency, long service life, simple maintenance, convenient installation, and other advantages; However, its disadvantage is that when the input torque is too large, it is prone to slip and even cause damage; In addition, it cannot operate in the forward and reverse directions but can only rotate in one direction, and the rotational speed range is generally not more than 3000 rpm; Moreover, there are a series of problems to be solved, such as loud noise, large vibration, and difficult maintenance!