According to the axial shape, the gear pinion shaft can be divided into two types: crankshaft and straight shaft. According to the bearing of the shaft, it can be divided into shaft, spindle and transmission shaft.
The rotating shaft bears both bending moment and molecular weight when it works. It is the most common shaft in machinery, such as the shaft in various reducers.
The spindle is used to support rotating parts which only bear bending moment but not transmit torque. Some spindles rotate, such as those of railway vehicles, while others do not, such as those supporting pulleys.
For smaller diameter gears, when the root circle diameter is close to the shaft diameter, the gear and shaft can be inserted into a main body.
Gear pinion shaft is a combination of shaft and gear. However, at design time, you still have to try to shorten the length of the axis. Too long points are not good for hobbing. Secondly, the shaft support is too long, which will cause the shaft to thicken and increase the mechanical strength (such as rigidity, deflection, bending strength, etc.).
The gear shaft is usually a pinion (gear with few teeth), and the gear shaft is usually at high speed (i.e. low blood pressure level).
Gear shafts are rarely used as variable speed sliding gears. They are usually fixed speed gears. First of all, because they are high-speed, they cannot perform sliding drive at high speed.
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