PLANETARY GEAR TRANSMISSION

摘要

Provided is a planetary gear transmission in which a first sun gear (11) rotates integrally with an input shaft (7). A first carrier (14) rotates integrally with a first intermediate shaft (81). A second sun gear (21) rotates integrally with the first intermediate shaft (81). A second carrier (24) rotates integrally with a first ring gear (13). A third ring gear (33) rotates integrally with the first intermediate shaft (81). A third carrier (34) rotates integrally with a second intermediate shaft (82). A fourth sun gear (41) rotates integrally with a third sun gear (31). A fourth ring gear (43) rotates integrally with the second intermediate shaft (82). A fourth carrier (44) outputs power. A first clutch (51) connects the input shaft (7) and the second intermediate shaft (82). A second clutch (52) connects the input shaft (7) and the first intermediate shaft (81). A third clutch (53) connects a second ring gear (23) and the third carrier (34). A first braking mechanism (61) brakes the rotation of the first carrier (14). A second braking mechanism (62) brakes the rotation of the first ring gear (13). A third braking mechanism (63) brakes the rotation of the second ring gear (23). A fourth braking mechanism (4) brakes the rotation of the third sun gear (31).