PROBLEM TO BE SOLVED: To prevent a rise of a temperature of a bearing by quickly discharge heat generated at a seal, and reducing heat transmission to an outer ring in the bearing, a rear lid, a front lid or the like.SOLUTION: A bearing device 1 for a railway vehicle has: a stair cylindrical seal case 6 attached to an outer ring end 4b; a flanged cylindrical sleeve 8 fit to an external peripheral face 7a of an abutment member 7 which abuts on an inner ring 2; and an oil seal 11 fit to the inside of the seal case, and having seal parts 11b, 8e which slide-contact with an external peripheral face of the sleeve. A flange part 8b of the sleeve is extended to a radial direction from a clearance between the abutment member and a tip of a seal case small-diameter part 6c, a labyrinth seal is formed of the tip of the seal case and the flange part, a peripheral heat insulation part (clearance) 9 is formed between the sleeve and the external peripheral face of the abutment member, and a radial heat insulation part (clearance) 10 is formed between the flange part and an end face 7d of the abutment member.SELECTED DRAWING: Figure 1
【課題】シールにより発生する熱を速やかに放熱し、軸受内外輪や後蓋や前蓋等への熱伝達を少なくし、軸受の温度上昇を防止する。【解決手段】外輪端4bに嵌着された階段筒状のシールケース6と、内輪2に当接する当接部材7の外周面7aに嵌合された鍔付筒状のスリーブ8と、シールケース内側に嵌合し、スリーブの外周面に摺接するシール部11b,8eを備えたオイルシール11と、を有する鉄道車両用軸受装置1であって、スリーブの鍔部8bが当接部材とシールケース小径部6cの先端との間より径方向に延出し、さらにシールケース先端と、鍔部とで、ラビリンスシールを形成し、スリーブと当接部材の外周面との間に周方向断熱部(隙間)9を形成する。鍔部と当接部材の端面7dとの間に径方向断熱部(隙間)10を形成する。【選択図】 図1
BEARING DEVICE FOR RAILWAY VEHICLE
鉄道車両用軸受装置
2016-04-07
Patent
Electronic Resource
Japanese
Wheel set bearing for railway vehicle and railway vehicle
European Patent Office | 2022
|