Anti-locking traction wheel set for cased well tractor

The invention relates to an anti-locking traction wheel set for a cased well tractor. The anti-locking traction wheel set is composed of a gear set, driving body assemblies and a connection assembly.The two sides of the gear set are connected with the two driving body assemblies correspondingly; a driving bevel gear of the gear set is installed in the driving body assemblies and sequentially engaged with driven bevel gears installed in the driving body assemblies, a driven wheel and a transmission gear, and the transmission gear is engaged with driving wheels installed on the driving body assemblies; two support rods of the connection assembly are connected with the two driving body assemblies correspondingly; one end of a push rod is connected with the support rods, and the other end ofthe push rod is connected with a hydraulic system; and the push rod is pushed and pulled through the hydraulic system, and driving bodies are expanded or contracted. The gear set is provided with sundry prevention steps, the d