| 摘要 |
PROBLEM TO BE SOLVED: To obtain a center pipe structure of a speed reducer which improves the durability of a seal member.SOLUTION: In a center pipe structure of a speed reducer G1, a first pipe 51 and a second pipe 52 which rotate relative to each other are coaxially connected at the inner side of an input shaft 14 (a hollow shaft) including a hollow part (a through hole) 14A which penetrates through the speed reducer (G1) in an axial direction. The first pipe 51 and the second pipe 52 includes portions Or1 where axial end parts of the first pipe 51 and the second pipe 52 are overlapped when viewed in a radial direction and portions Oa1 where the axial end parts are overlapped when viewed from the axial direction. A slide bearing 60 is disposed at the portions Or1 overlapped when viewed from the radial direction, and an O ring 64 serving as a seal member is disposed in the portions Oa1 overlapped when viewed from the axial direction. |
