Dust cover for ball joint

摘要

In a dust cover for a ball joint, a reinforcing ring is buries in a shaft side attaching portion closely fitted and fixed to an outer peripheral surface of a shaft portion of a ball stud in the ball joint, and an inner peripheral collar portion is formed in an inner peripheral portion of the reinforcing ring, the inner peripheral collar portion having a slightly larger inner diameter than an inner peripheral surface of the shaft side attaching portion. One sealing projection and the other sealing projection are alternately formed in the inner peripheral surface of the shaft side attaching portion, the one sealing projection being arranged at a position in an inner periphery of the inner peripheral collar portion of the reinforcing ring, and the other sealing projection being arranged at a position deviated from the inner periphery of the inner peripheral collar portion.

主权项

1. A dust cover for a ball joint having a ball stud including a shaft, the dust cover comprising:
a shaft side attaching portion closely fitted and fixed to an outer peripheral surface of said shaft; and a reinforcing ring buried in said haft side attaching portion; said reinforcing including:
first and second inner peripheral collars projecting diametrically inwardly relative to an inner peripheral surface of said reinforcing ring; anda groove-shaped inner peripheral concavity formed between the first and second inner peripheral collars and along the inner peripheral surface of said reinforcing ring, each of the first and second inner peripheral collars having an inner diameter which is larger than an inner diameter of an inner peripheral surface of said shaft side attaching portion; said inner peripheral surface of said shaft side attaching portion having:
an outermost sealing projection radially aligned with said first inner peripheral collar;an innermost sealing projection radially aligned with said inner peripheral collar; andan intermediate sealing projection radially aligned with said inner peripheral surface of said reinforcing ring; and the outermost and innermost sealing projections have a smaller diametrical thickness relative to the first and second inner peripheral collars than that of the intermediate sealing projection relative to the inner peripheral surface of said reinforcing ring.