Multi-gear transmission with planet gear structure mode

Abstract

The invention discloses a multi-gear transmission with a planet gear structure mode, and belongs to the technical field of automatic transmissions. The multi-gear transmission solves the problems that in the prior art of the automatic transmissions, more elements and a complex structure exist, and especially, a slightly progressive well graded transmission ratio series and the good meshing efficiency are difficult to supply. The multi-gear transmission comprises a first planet gear set, a second planet gear set, a third planet gear set and a fourth planet gear set which are sequentially arranged front and back along a main rotation shaft and six gear shifting elements, and the gear shifting elements are allowed to be selectively controlled, so that nine forward gears and one reverse gear are formed between an input shaft and an output shaft of the transmission; the input shaft is separably connected with a fifth shaft through a first clutch, and the fifth shaft is connected with a first sun gear and a second sun gear and connected to a shell through a first brake; the input shaft is separably connected with a fourth shaft connected to a first gear ring through a second clutch and connected with a third shaft through a third clutch; the output shaft is connected with a fourth planet carrier.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions, and relates to an automatic transmission unit, in particular to a power transmission system for motor vehicles, and in particular to a multi-speed transmission with a planetary gear structure. Background technique [0002] The powertrain of a motor vehicle consists of an engine, a multi-speed transmission, and a differential or final drive. A multi-speed transmission increases the overall operating range of the vehicle by allowing the engine to be operated multiple times through its torque range. The number of forward speed ratios (forward gears) available in the transmission determines the number of times the engine torque range is repeated. A low number of forward gears limits the overall speed range of the vehicle and thus requires a relatively large engine to produce a wide speed and torque range. [0003] At present, the four-speed automatic transmission, especially the aut...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems in the prior art that there are a large number of components and complex structures, especially that it is difficult to provide a slightly progressive, well-graded transmission ratio series and good meshing efficiency, and provides a Multi-speed transmission with planetary gear structure

Images