A main reducer for the rear drive axle of a new energy vehicle

Abstract

The invention discloses a main speed reducer of a new energy automobile rear drive axle. The main speed reducer comprises a shell, a differential mechanism assembly and a drive gear assembly. The drive gear assembly is fixedly arranged on the shell and comprises a bearing block, a drive gear, an inner bearing, a spacer bush, an outer bearing, an oil seal, a flange and a flange nut. With the axis of the bearing block as the standard, a pair of horizontally-arranged oil passing grooves are symmetrically formed in the inner wall of the bearing block and are tilt angle groove holes. A pair of oblique oil holes formed in the radial direction are symmetrically formed in the inner wall of the part, in the circumferential direction deviating from the oil passing grooves by 45 degrees, of the bearing block, a pair of oil passing ways are symmetrically formed in the inner wall of the shell, and the oil passing ways communicate with and correspond to the oblique oil holes in a one-to-one manner. According to the main speed reducer, the hidden danger that the low-speed oil pumping capability of a traditional main speed reducer is insufficient is avoided, the lubricating performance of the main speed reducer under various work conditions is improved, the oil seal oil leakage risk is reduced, the main speed reducer can replace a traditional rear drive axle main speed reducer and achieve multiple purposes, the management cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a main reducer of a rear drive axle suitable for rear-mounted power, in particular to the main reducer of a rear drive axle of a new energy vehicle. Background technique [0002] With the promotion and implementation of the national new energy strategy, my country's new energy vehicle market has ushered in an unprecedented era of development. Usually, the motor, as the power source of new energy vehicles, will be arranged at the rear of the vehicle, so the upper bias of the driving gear of the rear drive axle is determined. At this time, the low-speed lubrication performance of the driving gear and bearing must not be as good as that of the traditional driving gear with lower bias. Rear drive axle. When the traditional rear drive axle is moving forward, the gear oil is agitated by the driven gear, splashes from top to bottom, concentrates on the oil collection port of the main reducer shell, and flows into the outer bearing of...

AI Technical Summary

Problems solved by technology

At high speed, the upper part of the main reducer shell of the original structure does not have an oil collecting port, which also weakens the lubrication performance of the main reducer to a certain extent

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