The research object is a light truck drive axle, which is mainly composed of main reducer, axle housing, axle shaft, hub and bearing, as shown in Figure 1. When the drive axle works, the transmission shaft is connected with the flange plate of the input shaft of the drive...
After the spheroidizing annealing treatment of four processes, the SEM analysis results of each structure are shown in Figure 1. Through comparison, it is found that under the condition of process 1, the spheroidizing rate of lamellar cementite in the material matrix reaches more than 95%, which is equivalent...
Our country began to study the double circular arc gear from the mid-1960s, but entered the substantive research, test and application after 1975. After a series of analysis and industrial application, it is proved that the bearing capacity of double circular arc gear is higher than that of single...
1. Principle of starting motor driving gear to start engine The starting motor of internal combustion engine is to convert electric energy into mechanical energy, and transmit torque to the engine through electrical and mechanical structure to make it rotate continuously. That is to say, the starting motor drives...
1. Gear crack morphology After cutting, grinding and polishing, the fault gear was detected under the optical microscope. The crack originated from the root of the gear. The crack is relatively straight, the starting part is wide, and the tail is sharp. There is a certain angle between the...
The fracture of the driving gear is due to the looseness of the fastening nut of the starting motor gear, which makes the meshing transmission between the driving gear and the flywheel ring gear unstable. Under the high-speed operation of the motor, the impact load on the driving gear...
The starting motor drive gear material is 20CrMnTi, and the heat treatment process is normalizing quenching and tempering carburizing quenching and tempering. This paper analyzes the fracture morphology, chemical composition, metallography and mechanical properties of the driving gear of the starting motor, and analyzes the stress state of the...
It is concluded that the fracture of the driving gear is due to the looseness of the fastening nut of the starting motor gear, which makes the meshing transmission between the driving gear and the flywheel ring gear unstable. Under the high-speed operation of the motor, the impact load...
1.Principle of starting engine with starter motor driving gear The starting motor of internal combustion engine is to convert electric energy into mechanical energy, and transmit torque to the engine through electrical and mechanical structure to make it rotate continuously. That is to say, the starting motor drives the...
1. Hardness layer depth detection The results show that the surface hardness is 56-60hrc, the core hardness is 40-42hrc, and the layer depth is 0.6-0.85mm, which meets the technical requirements. 2. Tensile and impact test The tensile and impact specimens are made on the shaft of the gear for...