Zou was driving a car on the aisle when suddenly the car lost power and the steering wheel could not move significantly. Later, after the car came to a stop, Zou reported to the insurance company and asked it to compensate according to regulations. However, the insurance company believed that there were doubts about the cause of the car accident, so it entrusted an appraisal agency to conduct an appraisal to confirm the cause of the vehicle failure.
was entrusted by the court to conduct appraisal and analysis on "whether there are quality problems" in the PVC materials involved.
identification analysis results:
identification analysis expert team brought the failed transmission shaft and sliding fork back to the laboratory for testing, and made the following suggestions and conclusions:
Judging from the fracture of the transmission shaft, there are no traces of external impact. Severe wear and deformation occurred on one side of the sliding fork, and the width of the fracture was significantly reduced, reducing the sliding fork's load-bearing capacity. After further processes such as composition analysis and fracture analysis, it can be confirmed that the transmission shaft is caused by poor lubrication between the cross shaft and the bearing on the sliding fork, which leads to increased friction and high temperature. Under the mutual influence, the sliding fork eventually causes ductile fracture.
In summary, the drive shaft broke due to its own quality problems.
