Drive axle lubricant external circulation cooling system

Abstract

The invention discloses a drive axle lubricant external circulation cooling system. A built-in cooling oil pump and an axle drive bevel pinion of a drive axle are integrated; when a drive axle assembly works, the cooling oil pump sucks in a lubricant at the bottom of the drive axle assembly through a lubricant channel; the lubricant enters a lubricant cooler through an oil outlet pipe; the cooled lubricant enters a main reducer housing through an oil return pipe and finally returns back into the drive axle assembly; a one-way valve is arranged on the oil return pipe; and an unloading valve is arranged between the oil outlet pipe and the oil return pipe. Through the scheme of external circulation of the cooled lubricant, the problem of slow lubricant cooling of the automobile drive axle assembly is solved, the problems that the drive axle assembly of an external oil pump cooling system is large in arrangement space and high in cost are solved, and the problem that the external circulation system cannot protect the drive axle assembly or the cooling system when the cooler is damaged or the pipeline is blocked is also solved.

Description

technical field [0001] The invention relates to the field of automobile driving axle assembly, in particular to a cooling system for external circulation of lubricating oil of the driving axle, which is suitable for the driving axle assembly cooling the lubricating oil through the external circulation. Background technique [0002] At present, most automobile drive axle assemblies do not have a lubricating oil cooling system, especially for four-wheel drive passenger car front drive axle assemblies, which have high operating speed, heavy load, and the assembly position is close to the powertrain, and the structure is complex. Poor ventilation and heat dissipation conditions make the lubricating oil temperature in the front drive axle assembly high and heat dissipation is extremely difficult, which in turn leads to performance degradation or early failure of the drive axle assembly. In drive axle assemblies with cooling systems, external oil pumps are used without cooling sys...

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Problems solved by technology

[0003] The invention provides a cooling system for the external circulation of drive axle lubricating oil, which uses a built-in oil pump integrated with the driving bevel gear of the drive axle to cool the lubricating oil through the external circulation, which solves the problem of slow cooling of the lubricating oil of the automobile drive axle assembly and solves the problem of It solves the problem of large layout space and high cost of the drive axle assembly of the external oil pump cooling system, and at the same time solves the problem that the external circulation system cannot protect the drive axle assembly and cooling system when the cooler is damaged or the pipeline is blocked

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