To prevent the generation of an impression on a raceway surface by an impact load even if the impact load is applied while possessing a function for suppressing the intrusion of muddy water into a bearing from the outside.SOLUTION: A wheel rolling bearing device 10 comprises a sealing device 15 for sealing a one-side opening 18 in an axial direction between an outer member 11 and an inner member 12. The inner member 12 has an opposing wheel attachment flange 26 having a clearance e in an axial direction between the outer member 11 and an end face 28. The clearance e has a size for allowing the contact of the wheel attachment flange 26 and the end face 28 when a load having a precast magnitude is applied to the inner member 12. The outer member 11 has a notch 30 at an end part 29. The sealing device 15 has a cylinder part 41, a seal part 42 having a lip 43, and a deflector part 44 extending to the outside from the cylinder part 41 in a radial direction, and protruding to the outside through the notch 30 in the radial direction.SELECTED DRAWING: Figure 3
【課題】外部から泥水が軸受内部側に浸入することを抑える機能を備えつつ、衝撃荷重が作用した場合であっても、その荷重により軌道面に圧痕が生じることを防ぐ。【解決手段】車輪用転がり軸受装置10は、外方部材11と内方部材12との間の軸方向一方側の開口18を封止する密封装置15を備える。内方部材12は、外方部材11の端面28との間に軸方向について隙間eを有して対向する車輪取付用フランジ26を有する。隙間eは、内方部材12に所定の大きさの荷重が作用した際に、車輪取付用フランジ26と端面28とを接触可能とする大きさである。外方部材11は、端部29に切り欠き30を有する。密封装置15は、円筒部41と、リップ43を有するシール部42と、円筒部41から径方向外方へ延び切り欠き30を通じて径方向外方へ突出するデフレクタ部44とを有する。【選択図】 図3
WHEEL ROLLING BEARING DEVICE
車輪用転がり軸受装置
2024-10-18
Patent
Electronic Resource
Japanese