| 摘要 |
There is described a vibrating railroad ballast tamping tool head which provides ease of replacement of tamping tools, in the field. The head according to a preferred embodiment has a tamping tool holder mounted centrally on the end of a tool drive shaft, a pair of spaced tamping tool-shank receiving sockets being provided in the holder one on either side of the drive shaft and open to the underside of the holder. A pair of tamping tools each having a lower ballast engaging working face and an upper shank are located by means of tapered bores and key ways within each of the sockets and a tamping tool retaining yoke engages the shanks of both tamping tools underneath the tool holder and locks the tools to the holder by means of a centrally disposed bolt which is received in a blind bolt hole in the holder and draws up to force the tools into the sockets and to lock them therein. |
