Patent ID: 6732600
Filing Date: 2004-05-11
Classification: F16C,F16H,Y10T

Abstract:
A threaded drive, comprising a threaded spindle; a threaded nut which is in threaded engagement with said threaded spindle; a rotary bearing having a radially inner bearing part and a radially outer bearing part which are rotatable relative to one another about an axis and limit a ring chamber therebetween; a lubricant passage arrangement for supplying lubricant both to engaging surfaces of said rotary bearing and to engaging surfaces of said threaded spindle with said threaded nut, said lubricant passage arrangement including at least one first lubricant passage with an end opening on an inner peripheral surface of said outer bearing part into said ring chamber and another end which is connectable with a lubricant supply, and also at least one second lubricant passage which leads to an outer peripheral surface of said inner bearing part from said ring chamber, said threaded nut and said radially inner bearing part of said rotary bearing being formed as separate components which are connectable to one another during mounting of the threaded drive, said threaded nut having at least one third lubricant passage which is in a lubricant supplying connection with said second lubricant passage; and a lubricant supply system including a lubricant supply path which includes said lubricant passages, said lubricant supply system also including at least two outflow paths including a least one first outflow path which leads in said ring chamber to at least one part of the engaging surfaces of said rotary bearing and at least one second outflow path which leads through said radially inner bearing part to at least a part of said engaging surfaces of said threaded spindle and said nut, at least one of said outflow paths being provided with a controllable throttling point.