| 摘要 |
PROBLEM TO BE SOLVED: To improve sealing performance. SOLUTION: A first and a second labyrinth part 20 and 21 spaced radially inside and outside are defined between a rotary ring (hub spindle) 1 rotationally integrally coupled to an axle and a stationary ring (outer ring) 2 fixed to a vehicle body. An annular space 22 formed between the labyrinth parts 20 and 21 is surrounded by members constituting the labyrinth parts 20 and 21, and a radial dimension r7 of the annular space 22 is set larger than labyrinths r3 and r6 of the labyrinth parts 20 and 21, so that pressure resistance is increased. |
