BEARING VARIABLE PRELOAD SYSTEM UTILIZING GAP BETWEEN STROKES FOR PRELOAD ADJUSTMENT AND ELASTIC DEFORMATION OF SEALING MEMBER

摘要

A bearing variable preload system utilizing gaps between strokes for preload adjustment and elastic deformation of a sealing member, according to the present invention, comprises: a housing; bearings provided to the housing; a spindle coupled to the inner wheels of the bearings so as to rotate; and a variable preload unit provided to the housing, applying variable preload to the outer wheels of the bearings; a chamber comprised inside a variable preload unit in which the airtightness is maintained by a sealing member located between the housing member and pressing member touched with the outer wheels of the bearing; a pressure supply unit supplying air or oil pressure to a chamber through a supply pipe provided to the housing so as to vary a preload applied to the outer wheel of the bearing. According to the present invention, the spindle having the preload system has the effects on improving rigidness, preventing heat, reducing noise and vibration, extending the lifespan of the bearing or the like.

主权项

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