End surface floating disc type automatic four-speed pure electric power assembly

Abstract

The invention discloses an end surface floating disc type automatic four-speed pure electric power assembly. The end surface floating disc type automatic four-speed pure electric power assembly comprises a first planetary row and a second planetary row, wherein the first planetary row is arranged in the second planetary row; the two-speed composite planetary gear transmission device comprises a third planetary row and a fourth planetary row; a first rotating arm of the first planetary row is connected with a third rotating arm of the third planetary row and a second gear ring of the second planetary row; and a third gear ring of the third planetary row is connected with a fourth rotating arm of the fourth planetary row. The output shaft of the motor is connected with an elastic damping connecting disc, the elastic damping connecting disc is connected with the first planetary row, and the output shaft is connected with the third planetary row and the fourth planetary row. A first end surface floating disc type shifter is connected with the first planetary row, a second end surface floating disc type shifter is connected with the second planetary row, a third end surface floating disc type shifter is connected with the third planetary row, and a fourth end surface floating disc type shifter is connected with the fourth planetary row.

Description

technical field [0001] The invention relates to the field of vehicle electric transmission, in particular to an end face floating disc type automatic four-speed pure electric power assembly. Background technique [0002] With the continuous improvement of pure electric commercial vehicles' demand for high power performance, high power saving and cost reduction of pure electric powertrain, the end surface floating disc automatic four-speed pure electric powertrain has become a key to solve the above problems. At present, most of the drive schemes on the market adopt single-motor direct drive mode and multi-speed transmission with single motor and small speed ratio difference. Among them, multi-speed automatic transmission mainly adopts AMT scheme and AT scheme. Gear shifting, the latter mainly uses wet friction discs to perform gear shifting hydraulically. However, for multi-speed AMT gearboxes, there are power interruptions, large neutral gear loss, weak electric braking en...

AI Technical Summary

Problems solved by technology

However, for multi-speed AMT gearboxes, there are power interruptions, large neutral gear loss, weak electric braking energy recovery, difficulty in fast arbitrary gear switching, small speed ratio difference between gears, long shifting time, and high cost

For multi-speed wet friction pair AT gearboxes, although the problems of power interruption and arbitrary gear switching are solved, there are problems such as great idling loss after the clutch is disconnected, high cost, and high energy consumption for shifting.

The above two general-purpose multi-speed automatic transmission solutions are difficult to meet the driving needs of pure electric vehicles

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