Patent attributes
A bearing unit includes: a radial bearing for bearing in a circumferential direction of a shaft; a thrust bearing for bearing one end in a thrust direction of the shaft; a housing provided on the outside of the radial bearing and the thrust bearing and filled with a viscous fluid; a seal member united with the housing so as to contain the radial bearing and the thrust bearing in a sealed state, the seal member having a shaft passing hole through which the shaft is passed; and a passage for discharging air present inside the housing, the passage formed between the housing and the radial bearing, and the passage providing communication between the one end side and the other end side in the thrust direction of the shaft projecting from the radial bearing, wherein the cross-sectional shape of the passage is a shape including at least one acute angle.
