To maintain axial accuracy of a bearing for a long period to extend a service life of a bearing device, while reliably preventing fretting abrasion and preventing abrasion powder from entering the inside of the bearing due to the fretting abrasion.SOLUTION: An axle bearing device 1 comprises a rolling bearing 2, and a first spacer 15 arranged between a mating surface 17 of an inner ring 5 of the rolling bearing 2 and a mating surface 18 of a spacer 8. The mating surface 17 of the inner ring 5 and the mating surface 18 of the spacer 8 comprise a direct contact part 19 for contacting each other on the inner diameter side. The first spacer 15 comprises a core metal 20 that contacts the mating surface 18 of the spacer 8 on the outer diameter side of the direct contact part 19 and has an axial gap G1 with the inner ring 5, and an elastic sealing material 21 that seals a gap between the mating surface 17 of the inner ring 5 and the mating surface 18 of the spacer 8 on the outer diameter side of the axial gap G1.SELECTED DRAWING: Figure 2
【課題】フレッティング摩耗や、これに伴う摩耗粉の軸受内部への侵入を確実に抑制しつつ、軸受の軸方向精度を長期間にわたって維持することにより、軸受装置の寿命を延伸する。【解決手段】転がり軸受2と、転がり軸受2の内輪5の合わせ面17と間座8の合わせ面18との間に配置された第一スペーサ15と、を備えた車軸用軸受装置1である。内輪5の合わせ面17及び間座8の合わせ面18は、内径側で互いに当接する直接当接部19を備える。第一スペーサ15は、直接当接部19の外径側で間座8の合わせ面18と当接し、内輪5との間に軸方向隙間G1を有する芯金20と、軸方向隙間G1の外径側で内輪5の合わせ面17と間座8の合わせ面18との間をシールする弾性シール材21と、を備える。【選択図】図2
AXLE BEARING DEVICE
車軸用軸受装置
2020-10-01
Patent
Electronic Resource
Japanese