| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing sealing device for a cross coupling facilitating the change or the like of grease because of the weak tightening force of lip parts of a seal at the stop of the cross coupling while preventing the leakage of grease from a bearing and the infiltration of foreign matters from the outside because of the increased tightening force of the lip parts during the rotation of the cross coupling. SOLUTION: In this bearing sealing device for the cross coupling, the bearing B is formed by fitting a cup-shaped bearing case 4 to the outer periphery of each trunnion 2 of a joint cross 1 with an oil feeding hole 6, through rolling elements 3, and the elastic body seal 8 for closing a clearance between the open edge of the bearing case 4 and the trunnion 2 is mounted to the open edge of the bearing case 4. The lip parts 8a, 8b of the seal 8 are formed to project obliquely inside toward a base part 2a of the trunnion 2, and ring bodies 10, 10 or open ring bodies larger in specific gravity than the seal 8 are rigidly fixed to the lip parts 8a, 8b. |
