Oil return device for bearing box of forced lubrication system

The utility model discloses an oil return device for a bearing box of a forced lubrication system. The oil return device is characterized by comprising an oil return hole connecting part, wherein the oil return hole connecting part is provided with a cavity for containing the returned oil, and the bottom of the output end of an oil path of the oil return hole connecting part is provided with a downwards inclined oil return pipe connecting port. The oil return device has the advantages that the oil return hole connecting part is connected with an oil return hole, and the oil return pipe connecting port is connected with an oil return pipeline, so the oil return area of the oil return hole is increased, under the same conditions, the oil cooling amount is greatly increased, the overflow of oil is avoided, and the oil return effect and lubrication effect are greatly improved.