Gear shaft classification
According to the different axis shapes, the shaft can be divided into two types of crankshaft and straight shaft. According to the bearing condition of the shaft, it can be further divided into: 1 shaft, which can bear both bending moment and torque when working. It is the most common shaft in machinery, such as shafts in various retarders. 2 Mandrels are used to support rotating parts that only withstand bending moments without transmitting torque. Some spindles rotate, such as shafts of railway vehicles, and some spindles do not rotate, such as the shaft supporting a pulley. 3 Transmission shaft, mainly used to transmit torque without bending moment, such as the long optical axis in the crane moving mechanism, the drive shaft of the car and so on.
Gear shaft design
In the design, the use of gear shafts generally does not fall into the following categories:
1. The gear shaft is generally a pinion (gear with few teeth).
2, gear shaft is generally in the high-speed level (that is, low torque level).
3, gear shafts are generally seldom used as a variable-speed slip gear, which is generally a fixed-running gear. First, because it is in a high-speed stage, its high speed is not suitable for slip-shifting.
4. The gear shaft is an integral part of the shaft and the gear. However, when designing, it is still necessary to shorten the length of the shaft as much as possible. If it is too long, it is not conducive to the machining of the gear hobbing machine. The second problem is that the shaft support is too long and the shaft must be thickened. And increase the mechanical strength (such as rigidity, deflection, bending, etc.).
