| 摘要 |
A flexible drive transmission comprising a flexible drive shaft assembly having a first end connectable to a drive motor and a second end connectable to a driven implement, a tubular casing surrounding and coaxial with the drive shaft assembly, a lubricant disposed within the casing, and a lubricant-seal for blocking leakage of lubricant from the second drive shaft assembly end. The drive shaft assembly comprises a flexible elongated drive transmitting member, a first drive coupling fixed to the drive transmitting member at a first end, and a second drive coupling fixed to the drive transmitting member at the second end. The casing rotatably supports the drive shaft assembly and comprises a tubular flexible conduit, and end fitting that permanently secures one drive coupling against axial movement relative to the casing. The lubricant seal is disposed between the second end fitting and the drive shaft assembly second end for blocking leakage of lubricant from the casing as the casing and drive shaft assembly rotate and shift axially relative to each other.
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