RU2796276C1 - Swing cantilever crane for lifting boats and yachts - Google Patents

Abstract

FIELD: hoisting and transport engineering.

SUBSTANCE: swing cantilever crane for lifting boats and yachts consists of a column (2) installed on a concrete base (1), at the upper end (3) of which a rotary support (4) with a drive (5) is placed. A cargo boom (6) is fixed on the rotary support (4). On one side of the cargo boom (6) in relation to the rotary support (4), two cantilever beams (7) and (8) are installed, fixed on the upper chord (9) of the cargo boom (6). On the other side of the cargo boom (6) is a counterweight (10). In the lower part of the cantilever beam (7), with the possibility of moving along it, cargo electric hoists (11) and (12) are fixed, placed on opposite sides of the cargo boom (6). In the lower part of the cantilever beam (8) with the possibility of moving along it, cargo electric hoists (13) and (14) are fixed, placed on opposite sides of the cargo boom (6). Electric drives of all electric hoists are synchronized with each other.

EFFECT: synchronized movement of cargo electric hoists along the cantilever beams, it makes possible to lower or lift boats (yachts) in a wide range of length and width.

1 cl, 3 dwg

Description

The invention relates to hoisting and transport engineering, namely to cantilever cranes.

To assess the novelty of the claimed solution, consider a number of well-known technical means of a similar purpose, characterized by a set of features similar to the claimed device.

Known cantilever rotary crane according to application No. 95112055, containing a rotary column mounted on the foundation glass by means of an intermediate support with a bearing assembly, a rotary device associated with the lower part of the column and the foundation glass, connected to the upper part of the column by means of a hinged element, an arrow and an arrow lock in the form a crank mounted by one of the eccentric shafts pivotally in the column bracket and connected to the boom by another eccentric shaft.

Known cantilever rotary crane according to the patent of the Russian Federation No. 2429982, installed on the side platform of the vehicle, contains a frame mounted on the side platform and attached to the supporting frame of the vehicle by means of ladders, a rotary base attached to the frame, equipped with a hinge assembly that allows you to translate the crane into a transport position by laying it on the side platform of the vehicle in a horizontal plane, so that the rotary column and boom are located along adjacent perpendicular sides of the side platform of the vehicle.

Known cantilever rotary crane according to patent No. 193088 for the onboard platform of the vehicle, containing a column, a rotary base, made with the possibility of attaching to the floor of the onboard platform, an arrow equipped with a hook suspension, characterized in that the boom and column are made of a rectangular profile, while the boom made telescopic and contains a root part and a retractable section, at the end of which a block is fixed and a hook suspension is suspended.

Known cantilever slewing crane A.S. USSR No. 1618126, containing a column vertically mounted on the base and carrying a rotary device, a cargo boom carrying a cargo carriage and hinged in its middle part on the rotary device.

This technical solution, as the closest to the declared technical essence and the achieved result, is accepted as its prototype.

The disadvantage of the prototype, as well as other known designs of cantilever cranes that do not allow us to achieve our goal, is their narrow functionality associated with the difficulties that arise when it is necessary to lift long structures, such as boats or yachts from the water surface to the pier for repair or painting. For this, it is necessary to use additional devices, for example, beams, traverses, etc., which complicate the process of lifting loads and do not ensure its safety.

The objective of the claimed invention is to expand the functionality of the cantilever rotary crane by providing the ability to lift long structures, such as boats or yachts, from the water surface to the pier for repair or painting.

The essence of the claimed technical solution is expressed in the following set of essential features sufficient to solve the technical problem indicated by the applicant and obtain the technical result provided by the invention.

According to the invention, a cantilever slewing crane for launching and lifting boats and yachts, containing a column vertically mounted on the base and carrying a swivel device, as well as a cargo boom fixed on the column swivel device, characterized in that two cantilever transverse to it beams, each of which is equipped with two cargo electric hoists installed on different sides of the cargo boom with the ability to move along the transverse beams, while all the hoists are equipped with electric motors synchronized with each other.

The claimed set of essential features ensures the achievement of a technical result, which consists in the fact that the provision of the possibility of synchronized movement of cargo electric hoists along the cantilever beams allows the launching or lifting of boats (yachts) in a wide range of their length and width without the use of any traverses or other auxiliary equipment, which will significantly simplify the launching and recovery of boats (yachts), reduce labor costs for these cargo operations and increase their safety.

The essence of the proposed technical solution is illustrated by the drawing, in which Fig. 1 shows a general view of the claimed jib crane, Fig. 2 - view A (dotted lines show the possible positions of the electric hoists), in Fig. 3 - section B-B.

The claimed jib crane contains a column 2 mounted on a concrete base 1, at the upper end 3 of which a turntable 4 with a drive 5 is placed. device 4, two cantilever beams 7 and 8 are fixed on it, fixed on the upper belt 9 of the cargo boom 6. On the other side of the cargo boom 6 there is a counterweight 10. In the lower part of the cantilever beam 7 with the ability to move along it, cargo electric hoists 11 and 12 on different sides of the cargo boom 6. In the lower part of the cantilever beam 8 with the ability to move along it, cargo electric hoists 13 and 14 are suspended, located on opposite sides of the cargo boom 6. The jib crane is fully electrified, i.e. equipped with electrical equipment, including stationary and remote control panels and providing power supply to the drive 5 of the rotary device 4 and all electric hoists, the electric drives of which are synchronized with each other.

The claimed design works as follows When lifting the boat (yacht), the electric hoists 11-14, thanks to synchronized electric drives, move in pairs to the same distance relative to the cargo boom 6, after which the loops of tape slings (conventionally not shown in the drawing) are wound from the bow and stern under the boat (yacht) ) and lift them up. Then, after turning the cargo boom 6 to the desired angle, the boat (yacht) is lowered onto stationary or mobile keel blocks, depending on the need to carry out certain repair or maintenance work with them.

The use of the claimed technical solution is possible with the use of known technical and technological means.

Claims (1)

Cantilever slewing crane for launching and lifting boats and yachts, containing a column vertically mounted on the base and carrying a swivel device, as well as a cargo boom fixed on the column swivel device, characterized in that two cantilever beams transverse to it are fixed in the upper part of the cargo boom, each of which is equipped with two cargo electric hoists installed on different sides of the cargo boom with the ability to move along the transverse beams, while all the hoists are equipped with electric motors synchronized with each other.

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