Main pump motor bearing box convenient for replacing lubricating oil

The invention discloses a main pump motor bearing box convenient for replacing lubricating oil, which comprises a bearing box body, the upper end of the bearing box body is fixedly connected with a bearing box cover, the left side end face of the bearing box cover is connected with an upper branch pipe, and the upper branch pipe and the interior of the bearing box cover are arranged in a penetrating manner. According to the main pump motor bearing box, sealing bolts of a lubricating oil injection port and a lubricating oil discharge port can be conveniently, rapidly and conveniently mounted and dismounted, so that the replacement efficiency of lubricating oil of the main pump motor bearing box for large machinery can be effectively improved, and the amount of the injected lubricating oil can be conveniently observed through a liquid level observation column; therefore, the precision of the lubricating oil injection amount of the main pump motor bearing box for the large machinery is improved. 本发明公开了一种便于更换润滑油的