| 摘要 |
FIELD: mechanical engineering; lifting and transportation facilities. ^ SUBSTANCE: invention relates to load-lifting devices with scissor-type mechanism. According to invention, expansion drive of lift contains drive shaft with sprockets and connected by strands of roller-bushed chains through freely rotating sprockets with axles of hinge-connected intersecting pairs of levers. Free ends of strands of roller-bushed chains are connected with base by means of flexible members, for instance, extension springs. Geometric axes of freely rotating sprockets can be aligned with axes of rotation of lower ends of intersection hinge connected pairs of levers. End of drive shaft of expansion drive is mechanically coupled with electromechanical drive in form of geared motor. Lift is furnished with control panel of portable make provided with bracket for mounting on base. ^ EFFECT: increased load-lifting capacity, reduced materials usage and cost. ^ 4 cl, 6 dwg |
