The shaft, mandrel and drive shaft are mechanically common, but the differences are somewhat different.
The three axes of the shaft, mandrel and drive shaft are fundamentally different from the original design, and each industry application and bearing characteristics are also very different.
First, the mandrel
It is used to support the rotating parts to bear only the bending moment without transmitting torque. Some mandrels rotate, such as the axle of a railway vehicle, and some of the mandrels do not rotate, such as the shaft supporting the pulley.
According to whether the shaft rotates when working, the mandrel can be divided into a rotating mandrel and a fixed mandrel:
Rotating mandrel: the bearing is subjected to bending moment and the shaft rotates during operation;
Fixed mandrel: The Tilting pad journal bearing is subjected to bending moments and the shaft is fixed during operation.
Second, the drive shaft
It is a rotating body with high speed and low support, so its dynamic balance is crucial. Generally, the drive shaft must be tested for dynamic balance before leaving the factory and adjusted on the balancer. For the front-engine rear-wheel drive car, the rotation of the transmission is transmitted to the main reducer shaft, which can be several sections, and the joints can be connected by a universal joint.
Third, the shaft
Rotary shaft: It is a shaft used for rotating and working with both bending moment and torque. It is necessary to link the main parts of the product.
Common reels include: mobile phone hinges (flip or rotary screen phones); laptop reels; portable DVD reels; LED table lamp reels; LCD display reels; GPS and other car brackets and so on.