FIELD: transport.
SUBSTANCE: invention relates to hoisting device. Proposed device comprises guide tube and support tube displacing relative to the former. Guide tube accommodates hoisting mechanism with drive shaft assembly to couple with drive device, and output shaft assembly that serves to drive hoisting rod arranged in aforesaid support tube. Drive shaft assembly and output shaft assembly has are large-diametre drive gear and one smaller-diametre drive gear for each other. These large and smaller drive gears can be entered to each other for marking different gear ratios. Drive shaft assembly has hollow shaft running in bearing mounted in gearbox housing and shifting shaft aligned with hollow shaft shifting along the axis and running in bearing mounted in gearbox housing. Hollow shaft is designed for rigid fixation of large-diametre drive gear, while shifting shaft fixes smaller-diametre drive gear. Note that hollow shaft and shifting shaft are furnished with meshing device that allow varying gear ratio by axial displacement on throwing clutch in.
EFFECT: perfected design.
10 cl, 7 dwg
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