The difference between universal joints and couplings

The difference between universal joint and coupling:
1. Universal joint
The universal joint is a universal joint, which is a part that realizes variable-angle power transmission and is used for the position where the direction of the transmission axis needs to be changed.
The "joint" part. The combination of the universal joint and the drive shaft is called a universal joint transmission.
On a vehicle with front-engine rear-wheel drive, the universal joint drive is installed between the transmission output shaft and the input shaft of the drive axle final reducer; while the vehicle with front-engine front-wheel drive omits the drive shaft, and the universal joint is installed Between the front axle half-shafts, which are responsible for both driving and steering, and the wheels.
2. Coupling
A mechanical part used to connect two shafts (driving shaft and driven shaft) in different mechanisms to rotate together to transmit torque. In high-speed and heavy-duty power transmission, some couplings also have the functions of buffering, damping and improving the dynamic performance of the shafting. The coupling consists of two halves, which are respectively connected with the driving shaft and the driven shaft. Most of the general power machines are connected with the working machine by means of couplings.
When selecting a coupling, various factors should be considered comprehensively. Here to share some small experiences, I hope to help you. Selection of Coupling Type When selecting a coupling type, the following items should be considered. ① The size and nature of the required transmission torque, the requirements for buffering and vibration reduction functions, and whether resonance may occur. ② The relative displacement of the two shaft axes caused by manufacturing and assembly errors, shaft load and thermal expansion deformation, and relative movement between components. ③ The allowable dimensions and installation methods, and the necessary operating space for easy assembly, adjustment and maintenance. For large couplings, it should be possible to disassemble and assemble under the condition that the shaft does not need to move axially. In addition, the working environment, service life and conditions such as lubrication, sealing and economy should also be considered, and then a suitable type of coupling should be selected with reference to the characteristics of various types of couplings.