nullThe present invention relates to a kind of multiple-speed gear-box，It includes four planetary gearsets (P1、P2、P3、P4)、Eight rotating axles (1、2、3、4、5、6、7、8) and six switching devices (03、04、18、38、45、46、56、57)，Wherein，The sun gear of first planet gear train (P1) is connected with drive shaft (1)，This drive shaft is connected with the sun gear of third planet gear train (P3) and can be connected with the 8th axle (8) of the planet carrier being connected to fourth planet gear train (P4) via first clutch (18)，8th axle (8) can be connected with the 3rd axle (3) via second clutch (38)，3rd axle is connected with the planet carrier of third planet gear train (P3) and can be coupled on the planet carrier of first planet gear train (P1) via the first brake (03)，This planet carrier is coupled on housing (G)，4th axle (4) is connected with the sun gear of the second planetary gearsets (P2) and can be coupled on the planet carrier of first planet gear train (P1) via second brake (04) and the 7th axle (7) is connected with the gear ring of first planet gear train (P1) and can be connected with the 5th axle (5) via the 3rd clutch (57)，The sun gear of the 5th axle and the gear ring of the second planetary gearsets (P2) and fourth planet gear train (P4) connects，6th axle (6) is connected with the planet carrier of the second planetary gearsets (P2) and the gear ring of third planet gear train (P3)，Driven shaft (2) is connected with the gear ring of fourth planet gear train (P4)，And it is provided with the 4th、5th or the 6th clutch (45、46、56)，By Guan Bi the 4th、5th or the 6th clutch can locking the second planetary gearsets (P2).Bir ilk ve bir ikinci ucu (3, 4) bulunan bir ana parçası, ana parçanın (2) ikinci ucuna (4) bağlanan bir şaft tüpü (5), bir aletin girişi için ana parçanın (2) ilk ucundan (3) şaft tüpünün (5) ana parçadan (2) uzak ucuna (7) kadar uzanan bir geçiş açıklığı (6), ve ana parçanın (2) içine yerleştirilen, bir içi boş silindir şeklindeki cidarı (21) olan bir es
