SU405813A1 - MECHANISM OF THE LIFTING OF A LOADING LIFT PLATFORM - Google Patents

Description

one

The invention relates to warehouse load lifting devices that are intended for operation mainly in small-sized warehouses that have racks for packing cargo.

The mechanisms for lifting the loading platform are known (the Lift, containing a driving screw pair and a lifting flexible element. However, these mechanisms do not provide an even application of force to the screw pair, which leads to a reduction in its service life and reduces the coefficient of efficiency of such combinations.

The purpose of the invention is to provide a uniform screw pair. For this purpose, on the opposite sides of the nut, the trunnions on which the blocks fitted by the lifting flexible element are installed, both ends of the screw are made smooth and a spring is installed at its lower end, which takes up the load as the nut leaves the threaded section of the screw.

FIG. 1 shows schematically the platform lifting mechanism, general view; in fig. 2 is a section along the line A-A in FIG. one; in fig. 3- knot of the lower end of the screw; in fig. 4 - the safety device of the lifting platform.

The lifting mechanism of the loading platform Lift1NIka has a carrying frame, the vertical supports of which serve as guides / for the lifting loading platform 2. On the supporting frame there is mounted a drive 3 of the lifting mechanisms of the loading platform that has a connection

with a lifting screw 4. A nut 5 (fig. 2) of a lifting screw. manufactured with two axles on which movable 6 flexible cages 7 are attached. Through one of the blocks 6 passes element 7 from the fastening assembly 8 to the platform

2 and to the arm 9 at the same guide, and through the other block 6 there is a flexible lifting element from the same fixing unit 8 to the guide through blocks W-12 attached to the base frame to the fixing unit 13

to platform 2 on the other rail. Guides have a well-shaped section (Fig. 2), the open side of which is located in the direction opposite to the lifting platform, and is provided with gear

clutch rails 14, if necessary, with spring-loaded catchers 15. Lifting screw on the upper and lower konts of sections 16 without threads, with a diameter slightly below the internal diameter of the thread and a length providing access to this section of the nut 5. The lower end of the screw is provided with a spring 17 It provides partial load 1 when the nut is removed from the thread. The course of the lifting platform is limited to.

switches.

When the drive 5 is turned on, the lift screw 4 moves in. According to it, the nut 5 moves in the guide groove.

During the movement of the secret movement, the blocks 6 also move through the element 7 through the movement of the loading platform. Moving through the block system will be twice as fast as moving & the same nut turns. Blocks 6 with element 7 are supported on a vertical rail L preventing rotation of the secret 5. In case of failure of the limit switches, the nut 5 goes to the screw section without thread, without causing a breakage of the mechanism as a whole, and in case of a break of the flexible elements of the lift 7 (Fig. 4) the safety device 15.

Subject invention

The lifting mechanism of the cargo platform of the elevator, containing a driving screw pair and a lifting flexible element, characterized in that the aim of equal-abrasive loading of the screw pair on the opposite sides of the nut is pins, on which are installed blocks that bend around the lifting flexible element, both of which are The end of the screw is made smooth and a spring is installed at its lower end, which loads the ori from the threaded portion of the screw.

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