| 摘要 |
A welding bead apparatus comprising a: first hollow arm supporting a second hollow arm, a hollow spindle supporting the second hollow arm, a drive, a releasable clutch and a housing. The first hollow arm is connected to the second hollow arm by a swivel bearing, and a remote end of the second hollow arm supports a nozzle for facilitating welding on a surface. The spindle has opposed first and second open ends and at least a portion of an exterior surface of the spindle has a thread formed thereon. The drive is coupled to the spindle for supplying rotational drive to the spindle and causing rotation thereof. The housing accommodates the clutch and the drive. The clutch is located adjacent the thread of the spindle and the clutch has 1) an engaged position in which the clutch engages the thread to cause axial movement of the spindle, relative to the housing, during spindle rotation and 2) a disengaged position in which the clutch is spaced from the thread of the spindle such that the spindle is axially movable relative to the housing.
|
