RU2827254C1 - Stabilizing suspension for cargoes moved by crane - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: invention relates to structural elements of lifting and transport facilities, in particular to devices for limiting or preventing swaying of loads in longitudinal or transverse directions. Stabilizing suspension for loads moved by a crane comprises a unit, the body of which is attached to the load, placed on each crane sling, which are connected in the upper part and attached by the upper part to the crane hook, comprising an electric motor and a reduction gear on which the sling is wound, wherein sling length is varied by motor automatic control, wherein control is performed synchronously for all slings.

EFFECT: disclosed is a stabilizing suspension for loads.

6 cl, 2 dwg

Description

AREA OF TECHNOLOGY

The invention relates to structural elements of lifting and transport equipment, in particular to devices for limiting or preventing the swinging of loads in the longitudinal or transverse directions.

PRIOR ART

The prior art discloses devices for preventing loads from swinging in the longitudinal or transverse directions, for example a load lifting rope (see DE 1907598 A1, published 27.08.1970) (1), the pendulum movement of which must be suppressed in at least one pendulum plane, with two lifting ropes arranged in this pendulum plane, which can be synchronized with each other and inclined towards each other and together form a rope. The guide point of one lifting rope is connected in opposite directions to the guide point of the other lifting rope for the opposite deflection of the rope of the two lifting ropes in such a way that at these guide points a pendulum deflection is possible at the rope level and the opposite movement of the guide points can be damped and/or blocked.

The device (1) is not reliable, since compensation for load deviation occurs only in two directions.

The prior art also discloses a compact overhead lifting device with a function of preventing load swinging, such as lateral swinging or rotation when lifting up and down the body of the lift, using a plurality of wire ropes (see JP 2001199685A, 24.07.2001) (2). This lifting device has a winding drum with a vertical shaft, driven by a rotary drive device mounted on a support member. The winding drum is wound with a plurality of steel ropes, each of which is wound in several turns in a line. The lifting body (grab bucket) is suspended on a plurality of wire ropes driven by the winding drum, and can be driven by an opening/closing winding drum located near the winding drum, using a rope.

The device (2) is also not very reliable; all similar designs do not provide compensation for vibrations in any direction.

SUMMARY OF THE INVENTION

This invention is aimed at solving the technical problem associated with the creation of a safe, effective and inexpensive stabilizing suspension for cargo transported by overhead cranes.

The technical result of the invention is to increase the efficiency of stabilizing cargo transported by cranes.

The stated technical result can be achieved by means of a stabilizing suspension for loads moved by a crane, containing a block, the body of which is attached to the load, placed on each sling of the crane, which are connected at the top and are attached with the top part to the hook of the crane, containing an electric motor and a gearbox, onto which the sling is wound, while changing the length of the sling is ensured by means of automatic control of the electric motor, while the control is carried out synchronously for all slings.

In one embodiment, a gearbox with one transmission stage is used.

In one embodiment, a worm self-locking gearbox is used.

In one of the design options, the gearbox is provided with a groove for placing a sling.

In one embodiment, the suspension body is inseparably connected to the hook.

In one embodiment, the suspension body is connected to the hook using a quick-release connection.

BRIEF DESCRIPTION OF THE DRAWINGS

The essence of the invention is explained by drawings, in which:

Fig. 1 - diagram of the placement of stabilizing suspensions on a lifting crane;

Fig. 2 - schematic representation of the stabilizing suspension.

EMBODIMENT OF THE INVENTION

In accordance with an embodiment of the invention shown in Fig. 1, a stabilizing suspension for loads moved by a crane comprises several blocks attached directly to the load. Each block is connected to slings attached to the crane hook. Each block contains an electric motor and a gearbox onto which a sling is wound, while changing the length of the sling is ensured by automatic control of the electric motor, and the controls are performed synchronously for all slings.

The block mainly uses a gearbox with one transmission stage.

The most efficient way to use a worm gear is to use a self-locking gearbox.

The gearbox may be provided with a groove for placing a sling.

The suspension body may be permanently connected to the hook, but preferably the suspension body is connected to the hook by a quick-release connection.

The following design of the mechanism can be given as an example.

Let's consider the option with four slings. The length of each sling is adjusted separately using automatic control. Each of the four suspension slings is wound onto the electric motor shaft through a gearbox.

Four slings (ropes) are connected at the top and are attached at the top to the hook of the lifting crane. At the bottom of each rope (rope) there is a block consisting of a gear motor, the body of which is attached directly to the load.

Synchronized adjustment of the lengths of all four slings (ropes) of the suspension system allows for damping the swing of the load, as well as for minor maneuvering by rotation around the vertical axis.

INDUSTRIAL APPLICATION

The device can be used for transporting goods using cranes.

Claims (6)

1. A stabilizing suspension for loads moved by a crane, comprising a block, the body of which is attached to the load, placed on each sling of the crane, which are connected at the top and are attached with the top part to the hook of the crane, the block contains an electric motor and a gearbox onto which the sling is wound, while changing the length of the sling is ensured by means of automatic control of the electric motor, while the control is carried out synchronously for all slings. 2. A stabilizing suspension for loads according to paragraph 1, characterized in that a gearbox with one transmission stage is used. 3. A stabilizing suspension for loads according to paragraph 1, characterized in that a worm self-locking gearbox is used. 4. A stabilizing suspension for loads according to item 1, characterized in that a groove for placing a sling is provided on the gearbox. 5. A stabilizing suspension for loads according to item 1, characterized in that the suspension body is inseparably connected to the hook. 6. A stabilizing suspension for loads according to item 1, characterized in that the suspension body is connected to the hook by a quick-release connection.