To provide an axle bearing device that can prevent electrical corrosion while preventing a failure due to installation of an insulation coating layer.SOLUTION: An axle bearing device includes: an integrated outer ring having raceway surfaces for double-row rolling elements; a pair of inner rings individually having the raceway surfaces for the rolling elements in each row; and the double-row rolling elements arranged between the inner and outer rings while being retained by a retainer. The outer ring is provided with a recess having a depth of 1 mm or more at an outer diameter surface. The outer ring has an insulation coating layer at the outer diameter surface but does not have the insulation coating layer at a bottom surface of the recess.SELECTED DRAWING: Figure 2
【課題】絶縁被膜層を設けることによる不具合を防止しつつ、電食を防止することができる車軸用軸受装置を提供する。【解決手段】両列の転動体の軌道面を有する一体型の外輪と、各列の転動体の軌道面を夫々有する一対の内輪と、保持器に保持され前記内外輪間に配置された複列の転動体とを備えた車軸用軸受装置において、前記外輪の外径面に、深さが1mm以上の凹部を設けるとともに、前記外輪の外径面に絶縁被膜層を有し、前記凹部の底面には絶縁被膜層を有しない。【選択図】図2
AXLE BEARING DEVICE
車軸用軸受装置
2020-03-26
Patent
Electronic Resource
Japanese