Clark & Brody
Rolling bearing, spindle support structure of main motor for railway vehicle, and bearing structure
A cylindrical roller bearing 41 comprises an inner ring 42, an outer ring 43 having the same axial width as the inner ring 42 and having an insulation layer 43a formed on an outer diameter surface and both end faces thereof, cylindrical rollers 44 arranged between the inner ring 42 and the outer ring 43, a retainer 45 retaining intervals of the cylindrical rollers 44, and a sealing seal 46 as a sealing member having a roughly channel-shaped configuration in cross section projecting from both end faces of the inner ring 42 and the outer ring 43. Thus, a relation between a length L3 of the roller 44 and an axial width W3 of the inner ring 42 and the outer ring 43 satisfies L3/W3≧0.4, and a relation between a bearing volume V3 of the cylindrical roller bearing 41 and an internal space capacity C3 of the cylindrical roller bearing 41 satisfies 0.25≦C3/V3≦0.55.
NTN Corporation
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Katsunori Tsukasa Naoaki Hideji
Sone Yamakawa Tsuji Ito