ROLLING BEARING, AND SPINDLE DEVICE INCLUDING THE ROLLING BEARING

• Main Author: FURUYAMA MINEO
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2020
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a rolling bearing capable of actualizing a longer bearing life than a conventional structure while improving the holding amount of grease, and provide a spindle device including the rolling bearing.SOLUTION: The rolling bearing as an angular contact ball bearing includes an inner ring 1, an outer ring 2, a plurality of rolling elements 3 laid between the inner and outer rings 1, 2, a cage 4 for holding the plurality of rolling elements 3, and seals 5, 5 for blocking a bearing space. The rolling bearing having grease filled in the bearing space is used with grease lubrication. The cage 4 has pockets Pt formed in a plurality of circumferential sites around an axial center part to hold the rolling elements 3. In the outer peripheral face of the cage 4 at its position including the pockets Pt, a grease storage recessed part 9 is provided recessed radially inward and extending in the circumferential direction.SELECTED DRAWING: Figure 1 【課題】グリースの保持量の向上を図り、従来構造よりも軸受寿命を延ばすことができる転がり軸受およびこの転がり軸受を備えたスピンドル装置を提供する。【解決手段】この転がり軸受は、アンギュラ玉軸受であり、内輪１と、外輪２と、これら内外輪１，２間に介在する複数の転動体３と、複数の転動体３を保持する保持器４と、軸受空間を塞ぐシール５，５とを備える。この転がり軸受は、軸受空間にグリースが封入され、グリース潤滑で使用される。保持器４は、軸方向中央部に転動体３を保持するポケットＰｔが円周方向複数箇所に形成されている。保持器４の外周面における、ポケットＰｔを含む位置に、半径方向内方に凹む円周方向に延びるグリース収容凹部９が設けられた。【選択図】図１