Abstract: A housing and a ball joint including the housing are provided. The housing includes a holding part which holds an end portion of a dust cover and which can be formed at a low cost by deforming only a deformed part reliably without requiring additional process. A receiving part is provided on an upper end side of a housing body. A deformed part is provided at an upper end portion of the housing body to be adjacent to the receiving part. A sum of an angle of the outer peripheral surface of the receiving part relative to an axis-perpendicular direction of the housing body and an angle of the outer peripheral surface of the deformed part relative to the axis-perpendicular direction is set to be less than 180°.

Abstract: A bearing seat for a ball joint which simplifies the process of joining a housing and a bearing seat and makes it easy to guarantee the stiffness necessary for a ball joint as a whole by making it easy to fill the interior of an undercut groove with a softened or molten material and a ball joint having this bearing seat for a ball joint are provided. The ball joint 100 has a bearing seat in the form of a ball seat 130 which receives a ball portion 113 of a ball stud 110 inside a cast housing 120 so that the ball portion 113 can slidably rotate. The ball seat 130 has an undercut groove 140 in its outer peripheral surface which contacts the inner peripheral surface of the housing 120. The undercut groove 140 is formed so that the inner width W2 of its bottom portion 142 is greater than the opening width W1 of the opening 141 and so that its depth D is shallower than the opening width W1 of the opening 141.

Abstract: A bearing seat for a ball joint which simplifies the process of joining a housing and a bearing seat and makes it easy to guarantee the stiffness necessary for a ball joint as a whole by making it easy to fill the interior of an undercut groove with a softened or molten material and a ball joint having this bearing seat for a ball joint are provided. The ball joint 100 has a bearing seat in the form of a ball seat 130 which receives a ball portion 113 of a ball stud 110 inside a cast housing 120 so that the ball portion 113 can slidably rotate. The ball seat 130 has an undercut groove 140 in its outer peripheral surface which contacts the inner peripheral surface of the housing 120. The undercut groove 140 is formed so that the inner width W2 of its bottom portion 142 is greater than the opening width W1 of the opening 141 and so that its depth D is shallower than the opening width W1 of the opening 141.