Gear box oil pump having oil unloading structure, and gear box

Abstract

The invention provides a gear box oil pump having an oil unloading structure, and a gear box. The gear box oil pump is characterized in that a shell is provided with an annular groove and an oil unloading channel, the annular groove is positioned on the outer side of an oil pump rotor, and is arranged on the surface, attached to a separation plate, of the shell, the oil unloading channel is communicated to the annular groove, the separation plate is provided with a communication hole, one end of the communication hole is communicated to the annular groove, and the other end of the communication hole is communicated to the oil suction channel of the gear box oil pump. According to the present invention, the annular groove and the oil unloading channel communicated to the annular groove arearranged on the oil pump shell, and the communication hole respectively communicated to the annular groove and the oil suction channel of the oil pump is arranged on the position, corresponding to theannular groove, of the separation plate, such that the oil liquid in the gap between the oil pump shell and the separation plate can be discharged to the oil suction port of the oil pump so as to slow down the rising speed of the oil pressure in the gap between the oil pump shell and the separation plate, effectively reduce the axial force of the oil liquid on the part in the oil pump, and improve the service life of the oil pump.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a gearbox oil pump and a gearbox with an oil unloading structure. Background technique [0002] The oil pump is one of the key parts of the automatic transmission. It is the power source of the hydraulic system of the automatic transmission. It provides hydraulic oil for hydraulic actuators, control valves, torque converters and other components. Provide lubricating oil for bearings, etc. [0003] Existing gearbox oil pumps generally have a split structure, that is, the oil pump rotor is first assembled into the rotor groove of the oil pump housing, then the partition cover is set on the oil pump housing, and finally fastened with bolts. During the assembly process, it is generally required that the lower end face of the oil pump housing and the end face of the diaphragm have higher machining accuracy and flatness. However, the gap between the casing of the oil pump and the partition can...

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Problems solved by technology

[0005] The present invention provides a gearbox oil pump and a gearbox with an oil unloading structure to solve the problem that in the prior art, due to the presence of hydraulic oil between the oil pump casing and the partition, the deformation of the casing and the partition of the oil pump is aggravated, and the amount of oil leakage growing problem

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