RU2312055C2 - Load-gripping device - Google Patents

Abstract

FIELD: mechanical engineering; load-handling facilities.

SUBSTANCE: invention is designed for lifting and lowering of loads. Proposed load-gripping device consists of frame carrying electric motor and reduction gears to each of which two drive drums are connected. Textile tapes passed through holes in frame are wound on drums and they provide more tight holding of load. Pressure device in form of elastic pad is arranged in lower part of frame making it possible to press load and move it at high speed without swinging.

EFFECT: provision of quick lifting or lowering load in mine, load handling operations and mounting operations in difficult-to-get-at places, without assistance of slinger man and at minimum swinging.

3 dwg

Description

The invention relates to lifting and handling equipment, namely to load gripping devices, and can be used for lifting, moving and lowering cargo.

There are many load-gripping devices for lifting, lowering and turning over goods, but the closest in technical essence to the claimed device is a cross-bar-tipper [1] - No. 1477657 A1 В66С 1/68. The specified device includes a frame on which the motor is rigidly fixed. On both sides of the electric motor, on one axis, gearboxes, drive drums and flexible traction bodies are installed, which are connected to the load by means of a certain stocking by means of grippers.

The disadvantages of the prototype are:

1. In particular, the design does not allow to exclude the swinging of the load or minimize it as much as possible when moving. This leads to additional inertial loads, threatening the failure of mechanisms and flexible, holding the load of the traction organs, and with increasing mass of the load, the inertial loads will increase. Swinging complicates, and sometimes limits, the use of a load gripping device when lowering cargo into deep mines and other hard-to-reach places.

2. In the use of steel cables and elements for storage as flexible traction bodies, which complicates the overall design and reduces reliability.

The disadvantages of the prototype are eliminated by supplying the device with a clamping mechanism in the form of an elastic cushion and flexible textile tapes as flexible traction bodies, as well as two additional drums.

The introduction of an elastic cushion makes it possible to fix the load with a clamping device in a vertical plane, minimizing its sway and, as a result, reducing, or even eliminating, inertial loads.

The use of textile tapes allows you to more tightly grasp the load, reduce weight, while increasing the useful depth of lowering the load, and additional drums eliminate the need for stocking traction organs.

Thus, in the aggregate of the proposed changes in the prototype device, a load-lifting device is proposed to ensure reliable fastening of the transported load, reduce its swinging and inertial loads, increase production capabilities and reliability.

The claimed lifting device is illustrated in the drawing, where figure 1 schematically shows a General view of the device, ready to lift the load (the load is hooked, but not fixed); figure 2 is a view with a fixed load; figure 3 is a side view with a fixed load.

The load gripping device, suspended by ropes 5 on the hook of the lifting machine 6, contains a supporting frame 1, on which an electric motor 2 is installed, gearboxes 9 with drums 3, on which textile slings 4 are wound, holding the load 8. Under the frame there is a clamping device 7 in the form elastic pillows.

The lifting device operates as follows.

The lifting device is hung on the hook 6 of the lifting mechanism. The electric motor 2 is turned on, which drives the drive drums 3 by means of gears 9, and sets the required length of textile tapes 4, on which the load is secured by grasping it or using fast fastening devices. After securing the load and turning on the electric motor 2, the driving drums 3 wind the textile ribbons 4 until the cargo is pressed against the pressing device 7. Stopping the electric motor 2, the cargo is transported and tilted. Lowering the load is carried out together with the hook clip of the lifting machine. To lower the load into the deep shafts, when the length of the flexible bodies of the lifting mechanism is insufficient, the electric motor 2 of the load gripping device is turned on, which drives the drive drums 3 and the load on the flexible belts 4 is lowered to a predetermined depth.

New in the claimed invention is the possibility of the design of the proposed load gripping device to resist swaying, minimizing inertial loads, with a general decrease in mass and an increase in production capabilities (depth of lowering the load, work in hard-to-reach places). Namely: after securing the load 8 with flexible traction bodies 4 (textile belts), the electric drive 2 is turned on and, lifting the load up to the stop, is attracted to the pressing device 7 in the form of an elastic pad, thereby fixing in a vertical plane. Textile tapes when slinging the cargo, in most cases, do not need additional equipment (the existing equipment is simple and multifunctional), and their low weight allows you to increase the useful length.

This load-gripping device is able to be effectively used in confined spaces, as well as for loading and unloading and installation works both in ordinary and inaccessible places (without the help of a sling operator).

These technical results are achieved by attaching to the bottom of the frame of the clamping device (elastic element) in the form of an elastic cushion. At the same time, on the upper part of the frame, an electric motor and gearboxes are fixed, to which two drive drums are supplied, by switching on by means of flexible traction bodies, in the form of textile slings, the load is lifted with pressing and fixing it to the clamping device in a vertical plane.

The device is technologically advanced, not difficult to manufacture and is applicable in construction in confined spaces, as well as for loading and unloading and installation works in both ordinary and hard-to-reach places (without the help of a sling operator).

The implementation of the load gripping device in combination with the foregoing features (features of the claims) is new to load gripping devices and, therefore, meets the criterion of "novelty."

Designs, which include a frame on which an electric motor is mounted, on the rotor axis of which there are gearboxes installed on both sides, which in turn drive two drive drums in stock with flexible traction bodies in the form of textile slings, and a clamp is attached to the bottom of the frame a device in the form of an elastic cushion, and for the free passage of traction organs in the frame there are holes, not identified. Thus, the above set of distinctive features is unknown at this level of development of technology and does not follow from well-known rules for the design of load gripping devices, which proves compliance with the criterion of "inventive step".

The constructive implementation of the load gripping device with the indicated set of essential features does not present any structural, technical and technological difficulties, from which the criterion "industrial applicability" follows.

Bibliography

1. Patent No. 1477657 A1 B66C 1/68 - prototype.

Claims (1)

A load gripping device comprising a load-bearing frame mounted on a hook of a load-lifting machine, on which an electric motor is rigidly fixed, on the rotor axis of which are mounted on both sides of the rotor gears that transmit torque to the drums, with flexible traction elements fixed to them, which are connected to the load by means of a certain storage when help grippers, characterized in that in the lower part of the frame is equipped with a clamping device in the form of an elastic cushion, and flexible traction bodies are made in the form of textile tapes, with each gearbox is equipped with two drums.

Images