Double overrunning clutch shaft sleeve output automatic speed changing electric drive system with input of planetary gear train

Abstract

The invention discloses a double overrunning clutch shaft sleeve output automatic speed changing electric drive system with input of a planetary gear train. The planetary speed reduction input is adopted. A speed changing system comprises a low gear transmission mechanism, a reverse gear transmission mechanism and a self-adaption speed changing assembly; the reverse gear transmission mechanism hasa transmission ratio I for transmitting reverse gear power from a counter shaft to a main shaft; the low gear transmission mechanism has a transmission ratio II for transmitting low gear power from the counter shaft to the main shaft; and the transmission ratio I is greater than or equal to the transmission ratio II. The double overrunning clutch shaft sleeve output automatic speed changing electric drive system with input of the planetary gear train makes use of reasonable cooperation of two overrunning clutches, so that the overall structure is simple and compact; the reverse gear transmission shares a transmission route with the low gear transmission and the fast gear transmission, and interference is avoided; and the overall performance of the system is guaranteed, the adaptive capacity is high, cooperation is smooth and natural, the manufacture cost is reduced, and the stability of transmission is guaranteed; and the planetary speed reduction input is adopted, a high speed motorcan be adopted as a power source, and the monolithic efficiency is improved. The double overrunning clutch shaft sleeve output automatic speed changing electric drive system not only is suitable for the field of electric cars, but also is suitable for other variable torque mechanical transmission fields.

Description

technical field [0001] The invention relates to a transmission for a motor vehicle, in particular to an electric drive system with double overrunning clutch shaft sleeve output with planetary gear train input and automatic speed change. Background technique [0002] The working conditions of mechanical transmission systems are generally complex, and torque needs to be distributed to realize the transmission of different loads and speeds. Taking electric vehicles as an example, the driving environment is complex and changeable. Moreover, the electric drive method commonly used in existing electric vehicles is a motor-driven fixed-speed ratio, and the reasonable range of high efficiency is narrow and limited, resulting in a vicious circle, resulting in the following problems: [0003] 1. It can only work within the torque range of a certain working condition. [0004] 2. In order to meet the road conditions under the condition of constant speed ratio, the speed of the motor c...

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Problems solved by technology

[0014] In view of this, the purpose of the present invention is to provide an automatic variable speed electric drive system with double overrunning clutch sleeve output from planetary gear train input, and a reverse gear mechanism with strong adaptability is added. Under the condition of driving force, it can automatically shift gears and c

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