The role of the motor shaft

　　Motor shaftBased on the larger output torque of the motor. If it is a small motor, it is not necessary to manufacture key type and keyway type motors.

　　Motor shaftGenerally made of carbon steel. Only suitable for selectionMotor shaftThe processing plant is looking for quality assurance,35#and45#All can. general use45#Steel. Both of these materials belong to medium carbon steel, and their strength, stiffness and toughness can meetMotor shaftThe job requirements.Motor shaftHigh speed, low torque, using45#Steel manufacturing, no other heat treatment required. Raw materials are in a standardized state and the supply performance of raw materials can be met.Motor shaftmechanical performance requirements. Motor in the circuit with lettersMRepresentation(in the old standard.D), The main function is to generate driving torque. The generator is used as the power source of electrical appliances or various machines, and letters are used in the circuit.GThe main function is to convert mechanical energy into electrical energy. The motor shall be well lubricated during operation. General motor operation5000Hours or so, should be added or replaced grease. When the bearing is overheated or lubrication deteriorates during operation, the hydraulic should replace the grease in time. When replacing the grease, remove the old lubricating oil, clean the oil groove of the bearing and bearing cover with gasoline, and thenZL-3Lithium base grease injected into the cavity between the inner and outer rings of the bearing1/2(2Pole)and2/3(4Pole,6Pole and8Pole).Motor shaftIt can be divided into two types: optical axis and radial plate axis, which depends on the size of the motor rotor shaft hole. The processing technology of the optical axis and the spoke plate axis is basically the same, and the matching relationship between turning and the core is mostlyH7/k6. Of course, this is also related to the torque experienced by the motor rotor. According to calculation and experience, it can be concluded that the shaft extension end of the motor is the interface with the customer and needs fine grinding.

Generally speaking,Motor shaftThe processing process is: rough car/Drill center hole-Fine car/Grinding allowance for parts to be ground-grinding-Milling.Motor shaftIf the processing is carried out simply, it is the processing of lathe and milling machine, that is, turning, etc. So not much equipment. Install the disc onMotor shaftThe simple method is to make the inner hole of the disc largerMotor shaftThe diameter is then heated to assemble. Improve in machiningMotor shaftThe reason for the surface finish is that it can improveMotor shaftfatigue life, thereby improving its service life and aesthetics. At the same time, it can also improve the hardness and corrosion resistance of the finished product after processing. Structural design of the shaft: The structural design of the shaft is an important step in determining the reasonable shape of the shaft and all structural dimensions. It is related to the type, size and position of the parts installed on the shaft, the fixing method of the parts, the nature, direction, size and distribution of the load, the type and size of the bearing, the blank, the manufacturing and assembly process, the installation and transportation of the shaft, and the shaft Deformation and other factors are related. Designers can design according to the specific requirements of the shaft. If necessary, several schemes can be compared to select a design scheme. The following are the general design principles of the shaft structure:

　　1.Save materials, reduce weight, try to use the same strength size or cross-sectional coefficient of large cross-sectional shape;

　　2.Easy to accurately locate, stabilize, assemble, disassemble and adjust parts on the shaft;

　　3.Take various structural measures to reduce stress concentration and improve strength;

　　4.Convenient processing and manufacturing, to ensure accuracy. Classification of shafts: Ordinary shafts can be divided into crankshafts, straight shafts, flexible shafts, solid shafts, hollow shafts, rigid shafts and flexible shafts according to their structural shapes(Flexible shaft). Straight shaft can be divided into: rotating shaft, which bears both bending moment and torque when working. It is a common shaft in machinery, such as the shaft in various reducers. The spindle is used to support the rotating parts and only bears the bending moment and does not transmit torque. Some mandrels are rotating, such as the shaft of a railway vehicle, and some mandrels are non-rotating, such as the shaft of a supporting pulley. The drive shaft is mainly used to transmit the torque of the bearingless bending moment, such as the long light shaft in the crane moving mechanism, the automobile drive shaft, etc. The material of the shaft is mainly carbon steel or alloy steel, and ductile iron or alloy cast iron can also be used. The working capacity of the shaft generally depends on the strength and stiffness, but also on the vibration stability at high speed.