| 摘要 |
A vertical support structure (10) includes a half tube (11) and a mounting member (13). The half tube (11) has an inner surface defining a receiving space (15) and formed with a series of axially spaced-apart helical groove halves (12). The mounting member (13) is connected to an outer surface of the half tube (11). A lifting device (500, 500') is also disclosed, and includes a plurality of the vertical support structures (10), a plurality of rotation units (21), a plurality of slide housings (25), a lift carrier (30), a drive motor (40) and a plurality of transmission units (50). |
