ROLLING BEARING AND ELECTRIC MOTOR

• Main Authors: OBATA TOMOHIKO, YOSHINO MASATO
• Format: Patent
• Language: English; Japanese
• Published: 21.07.2023
• 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 having excellent channeling properties, and an electric motor having the rolling bearing incorporated thereinto.SOLUTION: A rolling bearing 1 includes an inner ring 2 and an outer ring 3, a plurality of balls 4, and a grease 7. The grease 7 includes a base oil with a kinematic viscosity of 6.12 mm2/s-74.8 mm2/s at 40°C and a thickener, wherein n is 1.74 or more, which is calculated from formula (1) and formula (2) in any shear rates [unit: s-1] x1 and x2 (x1<x2) at two points measured using a rheometer.SELECTED DRAWING: Figure 1 【課題】チャンネリング性に優れた転がり軸受、および転がり軸受が組み込まれた電動機を提供する。【解決手段】転がり軸受１は、内輪２および外輪３と、複数の玉４と、グリース７とを有する転がり軸受であって、グリース７は、４０℃における動粘度が６．１２ｍｍ２／ｓ～７４．８ｍｍ２／ｓの基油と増ちょう剤とを含み、かつ、レオメータを用いて測定される２点の任意のせん断速度［単位：ｓ－１］ｘ１およびｘ２（ｘ１＜ｘ２）における下記式（１）および式（２）から算出されるｎが、１．７４以上である。【選択図】図１