A two-speed gearbox with Simpson planetary gear structure and power transmission logic

Abstract

The invention discloses a two-speed reduction box with a Simpson type planetary gear structure and power transmission logic, which includes an input shaft on which a planetary gear assembly is installed; the planet carrier of the planetary gear assembly is connected to the intermediate shaft gear , the input shaft hole is connected with the countershaft gear with a needle bearing; the countershaft gear meshes with the differential ring gear; the differential gear ring is connected to the differential housing through bolts; the A right side gear and a left side gear are arranged symmetrically inside the differential housing, and the surfaces of the right side gear and the left side gear are meshed with differential planetary gears. It solves the problem of the traditional single-speed gearbox, the high-efficiency working range of the motor is limited, and the power consumption of the vehicle increases significantly when driving at high speed. It cannot take into account the medium-high speed and low-speed areas at the same time, which affects the driver's subjective experience. When overtaking at high speed, it cannot The driving acceleration is effectively improved, so there is a certain potential safety hazard.

Description

technical field [0001] The invention relates to the technical field of gear box equipment, in particular to a two-speed gear box with a Simpson planetary gear structure and power transmission logic. Background technique [0002] With the development of electric vehicles, most of the current market is that the motor is matched with a single-speed gearbox. The high-efficiency working range of the motor of the single-speed gearbox is limited, and the power consumption of the vehicle increases significantly when driving at high speed. Acceleration at low speed start and gradeability, high-speed cruising speed and acceleration performance cannot be taken into account. The high-efficiency working range of the motor is limited, the battery power is limited, and the power consumption of the vehicle increases significantly when driving at high speed, especially when the vehicle speed is greater than 80km / h, and the power acceleration performance is weak. , affecting the driver's subj...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Simpson-type planetary gear structure two-speed reduction box and power transmission logic, compared with the first-speed reduction box, it has better starting performance of the whole vehicle, stronger acceleration performance, and the highest speed It is only limited by the power capacity of the motor, not by the speed ratio. It has better cruising range and better NVH performance. Compared with the two-speed gearbox with synchronous shifting, there is no advantage of power interruption when shifting gears. The traditional single-gear gearbox is replaced, and the high-efficiency working range of the motor is limited. The power consumption of the vehicle increases significantly when driving at high speed. It cannot take into account the medium-high speed and low-speed areas at the same time, which affects the driver's subjective experience. When overtaking at high speed, it cannot be effective. Improve the driving acceleration, so there are certain safety hazards

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