| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball joint capable of effectively using grease, superior in rotational movement of ball studs, and in durability of abrasion. SOLUTION: This ball joint 1 has the ball stud 2, a socket 3, and a dust cover 4. The ball stud 2 composed of a movable part 25, and a holding part 26 having an oil groove 71. A grease suction chamber 27 is formed between these parts, and the movable part 25 has a first grease passage 252, and a first check valve 253. The holding part 26 has a second grease passage 262 and a second check valve 263. The ball stud 2 is provided with a repulsive tool 8. The volume of the grease suction chamber 27 is changed, accompanying rocking B of the ball stud 2, and the grease 5 is forcedly made to flow to a first grease chamber 31 from a second grease chamber 41. |
