| 摘要 |
PURPOSE: To eliminate need of an attached elastic element, and compact a bearing by forming an inner wall of an insert sleeve in a curved triangle, and properly deciding an inner diameter and an outer diameter of an outer member to prestress the sleeve. CONSTITUTION: A cross section of a sleeve 20 is formed in a curved triangle, and a roller 40 is provided between the insert sleeve 20 and an inner member 30. A circumferential length of the curved triangle is larger than a circumference of a circle having a diameter of D+2d (D is a diameter of the inner member 30, (d) is a diameter of the roller 40), and a diameter of an inscribing circle of the curved triangle is smaller than D+2d. A outer member 10 is thus capable of applying a prestress to the sleeve 20. Around to an apex 221 of the curved triangle, a gap (e) exists between a sleeve inner wall and an outer envelope drawn by the roller 40, so a bearing is capable of correctly actuating. In installing the inner member 30 on the outer member 10, a part around to the apex 221 is pulled toward an axial center 100, thereby a plug part will not be generated in material. |
