| 摘要 |
A swing lock mechanism for machines having an upper works rotatably mounted on a lower works by a swing bearing is connected to the drive shaft of a swing bearing drive assembly and comprises a swing lock plate, an annular pin support, and a plurality of locking pins. The swing lock plate is affixed to th e drive shaft and has at least one hole disposed about the axis of the drive shaft. The annular pin support is fixed against rotation relative to the drive shaft is dis posed about the axis of the drive shaft. The locking pins are supported by the annula r pin support and are also disposed about the axis of the drive shaft. The locking pi ns are arranged in such a manner so as at least one pin may engage a hole in the sw ing lock plate irrespective of the angular orientation of the swing lock plate relat ive to the annular pin support.
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