Patent ID: 7000493
Filing Date: 2006-02-21
Classification: F16C,F16H,Y10T

Abstract:
1. A screw device, comprising: a screw shaft provided with a spiral rolling member rolling groove on an outer peripheral portion thereof; a nut provided, on an inner peripheral portion thereof, with a loaded rolling member rolling groove having a spiral shape corresponding to the spiral rolling member rolling groove formed on the screw shaft; a number of rolling members disposed in a loaded rolling passage formed by the rolling member rolling groove of the screw shaft and the loaded rolling member rolling groove of the nut; a return member provided for the nut and arranged so as to connect one and another end portions of the loaded rolling passage so that the rolling members rolling on the loaded rolling passage circulate, said return member comprising a deflector in which the rolling member rolling on the rolling member rolling groove of the screw shaft gets over an outer diameter portion of the screw shaft to again return the rolling member to the rolling member rolling groove of the screw shaft, said deflector having a lubricant applying member accommodation portion into which a lubricant applying member is accommodated; and wherein said lubricant applying member is provided in the return member so as to supply a lubricant by contacting with the rolling member rolling groove of the screw shaft, said lubricant applying member being arranged inside the deflector.