Patent ID: 9644674
Date: 2017-05-09
CPC Classifications: B23Q,F16C

Claim:
1. A bearing variable preload system adjusting variable preload applied to outer wheels of bearings by utilizing a gap between strokes and elastic deformation of a member for sealing, the system comprising: a bearing housing member a housing; the bearings, the bearings being installed in the housing; a spindle coupled with inner wheels of the bearings so as to rotate; a variable preload unit provided to the housing so as to apply the variable preload to the outer wheels of the bearings, the variable preload unit including a pressing member and a sealing member, the sealing member being located between the bearing housing member and the pressing member in the variable preload unit, a chamber is formed in which sealing is maintained by the sealing member located between the bearing housing member and the pressing member, the pressing member touching the outer wheels; and a pressure supply unit supplying air or oil pressure to the chamber through a supply pipe provided to the housing so as to vary the preload applied to the outer wheels.