RU2765227C1 - Mobile gantry crane - Google Patents

Abstract

FIELD: hoisting and transport engineering.

SUBSTANCE: invention relates to hoisting and transport engineering, in particular, for loading/unloading goods from vehicles and reloading them to work sites located mainly in multi-tiered rooms with limited dimensions and area of ​​the receiving vestibule for performing such operations. The crane consists of two vertical support legs, in the lower part of each of which a wheelbase is fixed, and in the upper part there is a span with a lifting mechanism installed on it. One of the vertical racks is made shorter than the other by an amount equal to the difference between the levels of the tiers of the production site. The long support leg is made of two sections, the upper one of which is made in the form of two pipes inserted one into the other.

EFFECT: simplified design, providing the possibility of loading/unloading cargo from vehicles and reloading them to work sites, in multi-tiered rooms with limited dimensions and area of ​​the receiving vestibule, and expanding the service area.

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Description

The invention relates to hoisting and transport engineering, in particular for loading / unloading goods from vehicles and reloading them to work sites located mainly in multi-tiered rooms with limited dimensions and area of the receiving vestibule for such operations.

Known cantilever slewing crane containing a swivel column mounted on a foundation glass by means of an intermediate support with a bearing assembly and connected to the upper part of the column boom (I.I. Abramovich, V.Ya. Berezin, A.G. Yaura. "Crane industrial enterprises ", Directory, M. Mashinostroenie, 1989, p. 245, Fig. 14.6).

A cantilever mobile crane is known, containing a support beam, a box-shaped or tubular boom with treads, pivotally connected to the support beam, and struts pivotally connected by detachable connections at one end with the beam, and at the other with the side surfaces of the boom (RF patent No. 2072961, IPC V66S 23/46 (1997.01).

Known loading and unloading complex, which includes a support and adjustment table with a transverse carriage and a loading and unloading trolley. The complex is equipped with individual drives for moving each of the elements of the complex. The loading and unloading trolley is equipped with a longitudinal displacement drive and a trolley drive, and the support and adjustment table - with drives to compensate for the movement of the trolley in the vertical direction, while the transverse carriage is equipped with a transverse movement drive (RF utility model No. 109 726, MPK V62V 1/14 (2006.01 ).

Known manual gantry crane - mobile lifting device

(MPU) The standard design of MPU consists of two vertical metal supports in the form of a simple U-shaped frame, on which a beam with a manual winch or electric hoist is mounted. The crane moves with the help of a wheel base fixed on supports. MPU are widely used at facilities where there is no stationary lifting equipment and supporting structures for attaching lifting mechanisms: in repair shops, warehouses, service stations, in workshops for delivering parts to machine tools, etc. Due to their compactness, they can be used in rooms with a small area, www.mini-crane.ru.

A mobile gantry crane adopted as a prototype is known, containing two vertical supports, in the lower part of which a wheelbase is fixed, ensuring its rectilinear and angular horizontal movements, and in the upper part - a span beam with a lifting mechanism installed on it. In the span of the crane, on its vertical supports, a U-shaped frame is installed with the ability to move in the vertical direction and turn to a horizontal position, equipped with drives in the form of manual winches to move it in the vertical direction along the crane supports and to turn to a horizontal position, as well as a horizontal lock provisions. In this case, the axis of the frame turn is placed on the supports so that when turning to a horizontal position, one part of the frame is placed in space on one side of the crane supports, and the other on the other side, and the length of one or both parts of the frame exceeds the length of half the wheelbase.

The crane is equipped with a wheeled transport trolley with the ability to install and move it along the frame longitudinal beams in a horizontal plane (RU 2 706 773 V62V 1/14 (2006.01), V66S 5/00 (2006.01), V66S 19/00 (2006.01).

The main advantages of the prototype are:

• Small dimensions, compactness.

• Ability to replace various lifting equipment.

• Possibility of loading/unloading goods from vehicles and reloading them to work sites, in multi-tiered premises with limited dimensions and area of the receiving vestibule is provided.

The disadvantage of the prototype is the complexity of the device, due to the need to use in the design of manual drives for vertical lifting and turning the frame into a horizontal position, as well as the need to use an additional cargo trolley.

The objective of the invention is to eliminate the disadvantages of the prototype.

The problem is solved by the fact that on a mobile gantry crane containing two vertical supports, in the lower part of each of which a wheelbase is fixed, ensuring its rectilinear and angular horizontal movements, and in the upper part - a span beam with a lifting mechanism installed on it, one of the vertical the supports are made shorter than the other by an amount equal to the difference between the levels of the tiers of the production site, while the span beam is installed with the possibility of rotation around a long vertical support, the wheelbase of which is additionally equipped with a retractable support leg adjustable in length.

In addition to the fact that the long vertical support of the crane is made of two links connected to each other by a flange connection, while the upper link is made in the form of two pipes inserted one into the other, the outer pipe of which is rigidly connected to the lower link by means of a flange connection, and the inner pipe is installed in it on a bearing, equipped with a limiter of radial movement in the form of a sleeve - a plain bearing and is rigidly connected to the span beam.

In addition, the upper link of the long vertical support of the crane is equipped with a lock for the angular turn of the span beam, made in the form of a removable locking element that interacts with both pipes of the link.

In addition, stops are made at the bottom of both wheel bases of the crane, the ends of which are located 15-20 mm above the lower surface of the wheel rim.

In addition, a manual mobile hoist was used as a lifting mechanism.

The set of distinctive features provides a solution to the problem, namely, it allows to simplify the design of the crane and provide the possibility of loading / unloading cargo from vehicles and reloading it to a horizontal platform (floor, tier) located in a room of a limited area or outside it, for example, on the street in the absence and impossibility of using other lifting equipment, as well as to expand the service area.

The essence of the invention is illustrated by the drawing, where:

- in Fig. 1 shows a general view of a mobile gantry crane in the position of unloading the car in the vestibule of the production room;

- in Fig. 2 - the position of the crane when moving the cargo to the second tier of the production facility;

- in Fig. 3 - view A in Fig .1 (diagram of the movement of cargo on the site of the second tier of the production premises);

- in Fig. 4 - remote element B in Fig. one;

- in Fig. 5 - remote element B in Fig. one.

A mobile gantry crane is a structure that includes two vertical support posts 1 and 2 and a span beam 3. Wheel bases 4 and 5 with wheels equipped with brakes are installed at the bottom of the support legs on flange connections.

A hoisting mechanism 6 is installed on the span beam, which can be used as a manual or electric hoist.

The vertical support 2 is installed on the platform of the second tier 8, it is made shorter than the support 1 installed on the platform of the first tier 7 (tambour) by an amount equal to the difference between these levels. Both supports are made of pipes.

Support 1 is made of two sections. Section 9 of the support 1 is made of two tubes of circular cross section inserted one into the other. At the same time, the outer pipe 10 is rigidly connected with the lower link 12 by means of a flange connection 11, and the inner pipe is installed in it on a bearing 13, equipped with a radial displacement limiter in the form of a sleeve - a plain bearing 14 and is rigidly connected by a bolted connection 15 with a span beam 3. Section 9 is equipped with a lock for the angular turn of the span beam 3, made in the form of a removable locking element 16, which interacts with both pipes of the link.

The support 2 can be made both from pipes of round section and from shaped pipes, for example, of square section and connected to the span beam 3 by a bolted connection 1 7.

On both wheelbases 4 and 5 stops 1 8 are made, the ends of which are located above the lower surface of the wheel rim 19 by

To increase the stability of the crane during operation, and in some cases, to mount the crane, for example, when it is high (more than 5 m) with any lifting mechanism of low capacity available in the production room, the wheelbase 4 is equipped with a retractable telescopic support foot 20 s screw 21 interacting with the thrust surface 22. The support foot 20 is attached to the wheelbase with the stopper 23.

To prevent the support 5 from coming off the platform of the second tier 8, a dead end 24 is fixed on the edge of the platform.

In case of unauthorized overloading of the crane and breakage of the wheels 19, the wheel base of the support 4, 5 "sits" on the stops 18, which makes it possible to reduce the dynamic loads on the crane structure.

The procedure for unloading a truck indoors.

In the initial position, before unloading the truck, the gantry crane is installed in the vestibule of the platform 7 at a given distance from the side walls of the platform of the second tier 8.

The car enters the span of the crane, then from the mobile overpass or stairs, which is an accessory of the production facility, the load is slinged 25. The load is lifted from the body platform by the crane, the car leaves the room. The load 25 is lifted by a crane to the level of the platform of the second tier 8 and the crane is manually moved in the direction of the end wall 26 of the platform 8 (Fig. 2), lowered to the platform. If it is necessary to reload the load in the direction of the end wall 27, the crane is moved close to the wall 27, the clamps are removed, the support leg 20 is extended and, by manually turning the support 2 and moving the crane along the wall 27, the load is transferred to the specified location of the platform 8, for example, in the direction of the zone , indicated by the arrow G (Fig. 3), and lower it to the floor.

Loading the car from the platform of the second tier is carried out in the reverse order.

The design of the proposed gantry crane is easy to manufacture, provides the ability to load / unload cargo from vehicles and reload it to a horizontal platform (floor, tier), located both indoors, in a limited area, and on the street, in the absence and impossibility of using other lifting equipment, and expand the service area.

The company has developed drawings of a manual mobile gantry crane with a lifting capacity of 3 tf, designed for a lifting height of up to 7 m. Preparatory work is underway for the manufacture of a prototype.

After the manufacture and testing of the prototype, a decision will be made on the implementation of the proposal.

Claims (5)

1. A mobile gantry crane containing two vertical supports, in the lower part of each of which a wheelbase is fixed, ensuring its rectilinear and angular horizontal movements, and in the upper part - a span beam with a lifting mechanism installed on it, characterized in that one of the vertical the supports are made shorter than the other by an amount equal to the difference between the levels of the tiers of the production site, while the span beam is installed with the possibility of rotation around a long vertical support, the wheelbase of which is additionally equipped with a retractable support leg adjustable in length. 2. The mobile gantry crane according to claim 1, characterized in that the long vertical support is made of two links interconnected by a flange connection, while the upper link is made in the form of two pipes inserted one into the other, the outer pipe of which is rigidly is connected with the lower link, and the inner pipe is installed in it on a bearing, equipped with a radial displacement limiter in the form of a sleeve - a plain bearing and is rigidly connected to the span beam. 3. The mobile gantry crane according to claim 1, characterized in that the upper link of the long vertical support is equipped with a lock for the angular turn of the span beam, made in the form of a removable locking element that interacts with both pipes of the link. 4. Mobile gantry crane according to claim 1, characterized in that stops are made from the bottom of both wheel bases, the ends of which are located 15-20 mm above the lower surface of the wheel rim. 5. Mobile gantry crane according to claim 1, characterized in that a manual mobile hoist is used as a lifting mechanism.

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