| 摘要 |
FIELD: transport. ^ SUBSTANCE: invention relates to lifting device. Proposed device comprises movable guide tube and support tube moving relative to guide tube. Guide tube accommodates lifting mechanism with drive shaft assembly to joint drive device and output shaft assembly to drive lifting rod arranged in support tube. One end of said rod thrusts against load-bearing plate fitted on guide tube and another, movable, end interacts with sliding nut fitted in support tube. Said sliding nut has lock flange with at least two retainers interacting with lock grooves made on support tube so that, with sliding nut aligned with support tube, said nut can enter into support tube to turn angle and rotate about support tube lengthwise axis to get into clamping position whereat retainers get engaged with lock grooves. ^ EFFECT: reliable joint between sliding nut and support tube, simple replacement. ^ 6 cl, 8 dwg |
