The invention discloses a gear case lubricating oil automatic adding device. The gear case lubricating oil automatic adding device comprises an
oil storage chamber arranged on the outer side wall of a gear case body, a controller and an oil spraying head arranged on the inner side wall of the gear case body; the oil spraying head is connected to an output opening formed in the side wall of the
oil storage chamber through a conveying
pipe transversely penetrating the side wall of the case body, an
electric control gate is arranged on the output opening, and a flowmeter is connected to the middle portion of the conveying
pipe; a
turbine mechanism is arranged in the oil spraying head, a
voice frequency detecting device is arranged on the inner wall of the upper surface of the case body, and a comparison device is arranged inside the controller; and the
electric control gate, the flowmeter, the
turbine mechanism and the
voice frequency detecting device are all electrically connected with the controller. According to the device, abnormal gear running sounds in a gear case are detected through the
voice frequency detecting device, the controller controls to open the
electric control gate and run the
turbine mechanism, lubricating oil is sprayed to gears to achieve automatic lubricating oil adding and lubricating, time and labor are saved, the
mechanical equipment halting maintaining time can be shortened, the structure is simple, and popularization is easy.