Transmissions, powertrains and vehicles

Abstract

The invention discloses a transmission, a power drive system and a vehicle. The transmission comprises: an input shaft, a double-stage planetary gear mechanism, n single-stage planetary gear mechanisms and n+1 synchronizers, the first synchronizer is used to synchronize the first The second sun gear of a single-stage planetary gear mechanism is connected to the first ring gear or the first sun gear, and the i-th synchronizer is used to connect the second sun gear of the i-th single-stage planetary gear mechanism to the i‑1th single-stage planetary gear mechanism. The second planet carrier of the first-stage planetary gear mechanism or the second sun gear of the i‑1th single-stage planetary gear mechanism, and the n+1th synchronizer is used to connect the output end of the transmission to the nth single-stage planetary gear mechanism The second planet carrier or the second sun gear of the nth single-stage planetary gear mechanism is connected, wherein, 2≤i≤n, i and n are both natural numbers. According to the transmission of the present invention, fast, smooth and reliable shifting can be realized by setting n+1 planetary row n+1 synchronizer structure, and the transmission has a simple structure and is convenient for maintenance.

Description

technical field [0001] The invention belongs to the technical field of vehicle manufacturing, and in particular relates to a transmission, a power drive system and a vehicle. Background technique [0002] Hybrid drive vehicles, electric vehicles, and extended-range electric vehicles are the future development direction of automobiles, and they are also the main forms of new energy vehicles. In related technologies, the structure of the power transmission system is complicated, the working mode is complicated, and the control strategy is cumbersome. The energy conversion efficiency needs to be improved, and the kinetic energy of the engine and the electric energy of the battery cannot be fully utilized. There are problems of secondary conversion of energy, complex control, and low efficiency. Specifically, in the related art, the plate clutch and plate brake of the vehicle control gear shifting, but when these two components are not working, there will be a drag torque due to...

AI Technical Summary

Problems solved by technology

In related technologies, the structure of the power transmission system is complicated, the working mode is complicated, and the control strategy is cumbersome. The energy conversion efficiency needs to be improved, and the kinetic energy of the engine and the electric energy of the battery cannot be fully utilized. There are problems of secondary conversion of energy, complex control, and low efficiency.

Specifically, in the related art, the plate clutch and plate brake of the vehicle control gear shifting, but when these two components are not working, there will be drag torque due to lubrication, resulting in low efficiency of the entire transmission

[0003] In addition, in the multi-speed transmissions in the related art, most of the gears are selected by the shift fork and the sliding sleeve when the clutch cuts off the power. There are many pairs of gears, the space is large, and the structure is complicated, so there is room for improvement.

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