ROLLING BEARING UNIT FOR SUPPORTING WHEEL

• Main Authors: WATABE MASAMITSU, TANABE MASAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2017
• Subjects: AXLES FOR WHEELS OR CASTORS; BEARINGS; BLASTING; CASTORS; CYLINDERS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INCREASING WHEEL ADHESION; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PISTONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SEALINGS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLE WHEELS; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a structure capable of further improving effect for preventing intrusion of foreign matters into an internal space in which a rolling element is disposed, while securing a degree of freedom in design.SOLUTION: A plurality of bolts 29 for supporting and fixing a wheel 30 and a disc 31 to a rotation-side flange 10 are engaged with screw holes 13 of the rotation-side flange 10 from an axial outer side. An axial outer end opening portion of the internal space 15 is closed by a seal ring 16a. A tip end face of each bolt 29 is positioned at an axial outer part with respect to an axial inner side face of the rotation-side flange 10. A tip edge of an eaves lip 33 of a seal material 18a is closely opposed to a part where a radial position is aligned to an inner part in a radial direction of a hub 3 of the axial inner end opening portion of the screw hole 13, with respect to the axial inner side face of the rotation-side flange 10.SELECTED DRAWING: Figure 2 【課題】設計の自由度を確保しつつ、転動体を設置した内部空間内への異物の侵入防止効果をより向上させる事ができる構造を実現する。【解決手段】ホイール３０及びディスク３１を回転側フランジ１０に支持固定する為の複数本のボルト２９を、回転側フランジ１０のねじ孔１３に軸方向外側から螺合する。内部空間１５の軸方向外端開口部を、シールリング１６ａにより塞ぐ。各ボルト２９の先端面を、回転側フランジ１０の軸方向内側面よりも軸方向外方に位置させる。シール材１８ａのうち、庇リップ３３の先端縁を、回転側フランジ１０の軸方向内側面のうち、径方向位置が、ねじ孔１３の軸方向内端開口部のうちでハブ３の径方向に関する内方部分と整合する部分に近接対向させる。【選択図】図２