Speed reducer oil pump high in exhaust efficiency and not prone to oil leakage

Abstract

The invention provides a speed reducer oil pump high in exhaust efficiency and not prone to oil leakage. The speed reducer oil pump comprises a pump cover, an outer rotor, an inner rotor, a body coversealing ring, a pump body and an exhaust valve. The exhaust valve is mounted in an exhaust valve mounting hole in the outer side of the pump body. The position, corresponding to the exhaust valve, ofthe inner side face of the pump body is provided with a continuously tortuous exhaust passage and a cover plate for closing the exhaust passage. The side, close to a shaft hole, of the exhaust passage is provided with an air inlet hole. A through hole is formed between the exhaust passage and a threaded hole. High-temperature air flow and oil mist can only be discharged outwards through the exhaust valve in the threaded hole after passing through the exhaust passage. Multiple bent portions, close to the shaft hole side, of the exhaust passage communicate with one another through an oil groove. The oil leakage phenomenon of the exhaust valve can be avoided, and the loss amount of lubricating oil inside a speed reducer case can also be greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of exhaust gas for a reducer of a large new energy automobile, in particular to a reducer oil pump with an exhaust valve. Background technique [0002] With the promotion of automobile energy saving and emission reduction policies and increasingly stringent automobile emission regulations, domestic cities have vigorously promoted green travel. As an indispensable means of transportation for urban travel, urban public transport is particularly important in ensuring the efficient traffic rate of the city. It is the current general trend to develop towards low emission and high energy saving. Large-scale new energy vehicle motors and reducers are highly integrated, compact in structure, and arranged on the rear axle to directly drive the wheels. The larger torque, lower speed, and rear-mounted rear drive system of urban buses place higher requirements on the thermal management of the motor and reducer. In order to ...

AI Technical Summary

Problems solved by technology

[0003] The traditional motor exhaust valve is directly installed on the top of the reducer housing. When the reducer is at high temperature and rotates at high speed, the high-temperature air flow inside will mix a large amount of oil mist, and when the high-temperature gas is discharged through the exhaust valve, a large amount of oil will also be brought out. Fog, for a long time, it is easy to cause oil shortage inside the reducer. When the oil level is too low, the shaft inside the reducer and the planetary gear system are prone to poor lubrication and heat dissipation, resulting in premature wear of the moving parts or the phenomenon of burnt out of the reducer.

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