Assuming you are asking about the universal couplings (joints) in the drive shaft, these joints are needed because the engine is fixed to the vehicle's chassis (frame) whereas the wheels are suspended from the chassis. This means that the wheels able to move relative to the engine and transmission, so there must be a mechanism that accomodates this movement. This is most commonly done with u-joints in the driveshaft on rear-wheel or four-wheel drive. On front-wheel drive, this is often done with CV-joints.
Universal coupling
A hardy spicer is a universal coupling as found on vehicle drive shafts and they are fitted with needle bearings
no
Yes, I have stock in Universal Car and Hose Coupler Co.
Universal Joints connect the Driveshaft between the Transmission and the Rear Axle Differencial that transfers power from the Engine to the Transmission to the Rear Axle to move the car.
Connect piping together usually.
control coupling content coupling common coupling data coupling external coupling message coupling
There are many like flexible coupling, jaw coupling, sleeve coupling, tire coupling, pin and bush coupling, rigid coupling, etc
1.Drive shaft of a vehicle 2.Automotive steering linkages
transformer coupling
rc coupling is a coupling that involves capacitor aand resistor
no.transformer coupling gives higher gain