Patent ID: 7951040
Filing Date: 2011-05-31
Classification: B60K,F16H

Abstract:
1. A triple-axle-drive multistage transmission for heavy machinery, which is disposed between a bevel gear unit, receiving power from a torque converter coupled to an output shaft of an engine, and a differential gear unit, coupled to a wheel shaft to output the power, changed in speed, the triple-axle-drive multistage transmission comprising: an input part, comprising a clutch part including a forward clutch part and a reverse clutch part to control transmission of the power received from the bevel gear unit depending on whether the heavy machinery moves forwards or backwards, an input drive shaft coupled to the forward clutch part to mediate forward power transmission, a forward drive gear provided on a first end of the input drive shaft to transmit forward power, an input drive shaft stopping unit to restrain rotation of the input drive shaft, and a reverse drive gear coupled to the reverse clutch part to transmit backward power; and a speed changing part, comprising a speed change drive shaft to mediate a change of speed of the power input from the input part, a planetary gear unit coupled to a first end of the speed changed drive shaft and having a first planetary gear assembly and a second planetary gear assembly, which respectively include first and second ring gears, first and second planetary gears, first and second carrier shafts and the first and second sun gears, to receive the power from the forward drive gear, a reverse driven gear provided on a second end of the speed change drive shaft and engaging with the reverse drive gear to transmit the input power to the speed change drive shaft, and a speed change drive shaft stopping unit and a first carrier shaft stopping unit to respectively restrain rotation of the speed change drive shaft and the first carrier shaft of the first planetary gear assembly, wherein the power, changed in speed, through the planetary gear unit, is output to the wheel shaft through the differential gear unit.