Crankshaft rear oil seal seat, engine oil return structure, engine and vehicle

Abstract

The invention relates to a crankshaft rear oil seal seat, an engine oil return structure, an engine and a vehicle. An oil return hole and a gear chamber used for containing an air pump driving gear are arranged on the crankshaft rear oil seal seat, the oil return hole communicates with an engine oil channel and the gear chamber on an engine cylinder block, and an opening is formed in the side wallof the gear chamber, so that the air pump driving gear can be connected with a crankshaft in a transmission mode through a transmission gear mechanism arranged in a crankshaft case, an oil storage groove is formed in the position, below the air pump driving gear and corresponding to the opening, of the side wall of the gear chamber, an inlet close to the oil return hole and an outlet facing the opening are formed in the oil storage groove, engine oil from the oil return hole can flow into the oil storage groove through the gear chamber and can flow out into the crank case, and the bottom wallof the oil storage groove is not higher than the lowest point of the air pump driving gear. By means of the technical scheme, the crankshaft rear oil seal seat can solve the technical problems that oil return is not smooth and engine oil is blocked when natural oil return is conducted through gravity.

Description

technical field [0001] The present disclosure relates to the technical field of automobile engines, in particular to a crankshaft rear oil seal seat, an engine oil return structure, an engine and a vehicle. Background technique [0002] In the prior art, the air pump of the engine generally has two oil return methods, one is to return oil by adding a special oil return device, which returns oil through the oil return pipe; the other is natural oil return, which relies on the gravity return of the oil itself. Oil. The choice of oil return method mainly depends on the transmission mode of the air pump. If the air pump is driven by a belt, it is necessary to add an oil return pipe to return oil; if the air pump is driven by a gear or a chain, natural oil return is used. [0003] The oil return of the oil return pipe can ensure the smooth oil return of the air pump, but it will increase the engine cost, engine assembly cycle and assembly difficulty, and also increase the oil le...

AI Technical Summary

Problems solved by technology

[0003] The oil return of the oil return pipe can ensure the smooth oil return of the air pump, but it will increase the engine cost, engine assembly cycle and assembly difficulty, and also increase the oil leakage points where oil leakage may occur, reducing the reliability of the engine

The natural oil return method relies on gravity oil return. In the absence of other reliable power, the oil return path is unstable, which may easily cause problems such as poor oil return and oil clogging.

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