WHEEL BEARING DEVICE

• Main Authors: BABA TOMOKO, KOMORI KAZUO
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2024
• 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

To provide a wheel bearing device capable of further reducing the weight while enhancing rigidity.SOLUTION: A wheel bearing device 1 includes: an outer ring 2 having double-row outer raceway surfaces 23, 24; an inner member (a hub ring 3 and an inner ring 4) having double-row inner raceway surfaces 33, 41 facing the double-row outer raceway surfaces 23, 24; and double-row ball rows 5, 6 rollably housed between both raceway surfaces of the outer ring 2 and the inner member. A pitch circle diameter (b) of a ball 7 in the ball rows 5, 6 and a ball pitch (a) between the ball 7 in the outer side and the ball 7 in the inner side in the ball rows 5, 6 satisfy a relation of b/a≥2.0.SELECTED DRAWING: Figure 1 【課題】剛性を高めつつ、更なる軽量化を図ることができる車輪用軸受装置を提供する。【解決手段】車輪用軸受装置１は、複列の外側軌道面２３、２４を有する外輪２と、複列の外側軌道面２３、２４に対向する複列の内側軌道面３３、４１を有する内方部材（ハブ輪３および内輪４）と、外輪２と内方部材との両軌道面間に転動自在に収容された複列のボール列５、６とを備える車輪用軸受装置１であって、ボール列５、６におけるボール７のピッチ円径ｂと、ボール列５、６におけるアウター側のボール７とインナー側のボール７とのボール間ピッチａとが、ｂ／ａ≧２．０の関係を満たす。【選択図】図１