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

Abstract

The disclosure relates to a crankshaft rear oil seal seat, an engine oil return structure, an engine and a vehicle. The crankshaft rear oil seal seat is provided with an oil return hole and a gear chamber for accommodating an air pump driving gear, and the oil return hole is connected to the engine cylinder block The oil channel and the gear chamber, the side wall of the gear chamber is provided with an opening, so that the air pump drive gear can be connected to the crankshaft through the transmission gear mechanism arranged in the crankcase, the side wall is below the air pump drive wheel and corresponds to An oil storage tank is provided at the position of the opening, and the oil storage tank is provided with an inlet close to the oil return hole and an outlet toward the opening, so that the oil from the oil return hole flows into the oil storage tank through the gear chamber and can flow out into the crankcase, wherein , the bottom wall of the oil storage tank is not higher than the lowest point of the air pump drive gear. Through the above technical solution, the crankshaft rear oil seal seat provided by the present disclosure can solve the technical problems of poor oil return and engine oil clogging when the oil is returned naturally by 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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