| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure for restraining mud or the like from entering a labyrinth seal of an endless-track driving device.SOLUTION: In a seal structure of an endless-track driving device 101, a labyrinth seal 5 is arranged between a rotary casing 20 for driving an endless-track belt of a vehicle and a fixed housing 10, and an inclined outer wall part 13 inclining in the approaching direction to a rotary axis O of the rotary casing 20 as going away in the rotary axis O direction from a seal opening part 5A of the labyrinth seal 5, is formed in an outer wall part 22 of the rotary casing 20 for opening the labyrinth seal 5. |
