Oil leakage prevention mechanism

The utility model relates to the technical field of oil coolers, and discloses an oil leakage prevention mechanism which comprises a shell, an oil inlet, a cooling box, a small motor, an oil outlet, a rotating assembly, an on-off assembly and a sensing assembly. On-off assemblies are arranged at the joint of the oil inlet and the cooling box and the joint of the cooling box and the oil outlet, and sensing assemblies are arranged below the on-off assemblies. According to the oil leakage prevention mechanism, a small motor rotates to drive a belt to rotate, so that two sets of threaded rods rotate to drive a valve to be far away from a blocking block, a cooling box communicates with an oil inlet and an oil outlet, and an induction block is arranged outside the connecting position of the cooling box and the oil outlet; the induction block receives induction and then transmits a signal to the small motor on the same side, the small motor on the same side rotates to enable the valve to be inserted into the blockin