Transmissions, powertrains and vehicles

Abstract

The invention discloses a transmission, a power drive system and a vehicle. The transmission comprises: a three-row planetary gear mechanism, an input shaft, a first intermediate shaft, a second intermediate shaft, a first synchronizer and a second synchronizer, the first planetary gear The first ring gear of the mechanism is fixedly connected with the case of the transmission, the second planet carrier of the second planetary gear mechanism is connected with the output end of the transmission, the third ring gear of the third planetary gear mechanism is fixedly connected with the case of the transmission, and the second The third planet carrier of the three planetary gear mechanism is connected with the second ring gear, the first synchronizer connects the first intermediate shaft with the first planet carrier or connects the first intermediate shaft with the first sun gear, and the second synchronizer connects the first intermediate shaft with the first planet carrier. An intermediate shaft is connected to the second sun gear or connects the first intermediate shaft to the second planet carrier. According to the transmission of the present invention, by setting the three-planetary double-synchronizer structure, fast, smooth and reliable gear shifting can be realized, 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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