JP2010112554A5 - - Google Patents

Claims (4)

A linear motion bearing in which a shaft body is slidably accommodated in a non-rotating manner inside a cylindrical body, and two or more mounted around the cylindrical body at intervals from each other along the length direction of the cylindrical body A linear motion bearing with a rotary bearing comprising a rotary bearing,
The diameter of the outer peripheral surface of the cylindrical body is constant in the length direction of the cylindrical body, and the rotary bearings are arranged in a circumferential groove formed in the outer peripheral surface of the cylindrical body, and the circumferential groove. Accommodates a plurality of rolling elements, an annular rolling element holder that rotatably holds a part of each rolling element protruding to the outer peripheral side, and each rolling element portion protruding from the rolling element holder A linear motion bearing with a rotary bearing, comprising: an annular body having a circumferential groove on an inner peripheral surface thereof.   The linear motion bearing with a rotary bearing according to claim 1, wherein the annular bodies of the rotary bearings are connected to each other to form an outer cylinder. The difference between the diameter of the outer peripheral surface of the inner peripheral surface of the diameter and the cylindrical body of the annular body, rolling in the range of 1.2 to 1.95 times the diameter of the moving body according to claim 1 or 2 in length Linear motion bearing with rotary bearing.   An annular rolling element cage of each rotary bearing includes a peripheral wall arranged coaxially with the cylindrical body in which a plurality of through holes for holding the rolling elements are formed, and the rolling element cage of one rotary bearing A plurality of slits that reach the end surface of the other rotary bearing from the respective through holes are formed in the peripheral wall of the other rotary bearing, and the peripheral wall of the rolling element cage of the other rotary bearing is formed from the respective through holes. A plurality of slits reaching the end surface on the one rotary bearing side are formed, and the width of each slit of each rolling element holder is in the range of 0.7 to 0.95 times the diameter of the rolling element. The linear motion bearing with a rotary bearing according to any one of claims 1 to 3, wherein the linear motion bearing is in length.