CN205527400U - Lifting mechanism - Google Patents

Abstract

The utility model discloses a lifting mechanism, which comprises a portal frame, a fixed pulley group, a hoisting hoist, a tower cap fixed pulley group and a lifting hook; the portal frame includes a balance arm, a column and a beam, and the column is vertically fixed on the balance arm On the top, the beam is fixed between two columns to form a door-shaped structure, and the fixed pulley block is arranged on the beam. The fixed pulley block includes a fixed pulley, a movable pulley and a movable pulley block. The wire rope on the hoisting machine passes through the fixed pulley block of the tower cap. , to reach the fixed pulley, and then pass through the movable pulley block and the movable pulley in turn, connect with the lifting hook and fix it on the fixed end of the steel rope of the beam. The utility model can make great use of its own space and solve the problem that the tower crane is inconvenient to disassemble the counterweight in the high altitude. It only needs to start lifting the main winch and use the interaction of the pulleys to disassemble by itself, and the counterweight is vertical It can be disassembled to the ground, with simple structure and convenient operation.

Description

a lifting mechanism

technical field

The utility model relates to the field of cranes, in particular to a hoisting mechanism of the crane.

Background technique

With the progress of society, the floors are built higher and higher, and the distribution of high-rise and super-high-rise buildings is close, which makes it inconvenient for the tower crane to dismantle itself at high altitude during the construction process. It is necessary to use auxiliary equipment to disassemble at high altitude. The counterweight of the tower crane cannot be disassembled due to the lifting capacity of the equipment itself and the coverage area.

Utility model content

Aiming at the deficiencies in the above technologies, the utility model provides a hoisting mechanism that can make good use of its own space.

In order to achieve the above object, the utility model provides a lifting mechanism, which includes a portal frame, a fixed pulley block, a hoist hoist, a tower cap fixed pulley block and a lifting hook; the portal frame includes a balance arm, a column and a beam, and the Both the balance arm and the column are provided with two, the column is vertically fixed on the balance arm, the beam is fixed between the two columns to form a door-shaped structure, the fixed pulley block is arranged on the beam, and the fixed The pulley block includes a fixed pulley, a movable pulley and a movable pulley. The wire rope on the lifting hoist passes through the fixed pulley of the tower cap, reaches the fixed pulley, passes through the movable pulley and the movable pulley in turn, and connects with the lifting hook Finally, it is fixed at the fixed end of the beam steel rope.

Wherein, the balance arm includes a tower crane connecting beam, a base and a splint, through holes are provided at the top corners of the base and the splint, the tower crane connecting beam is clamped between the base and the splint, and the high-strength bolt Fasten the tower crane connecting beam, base and splint together through through holes.

Wherein, the lower end of the column is welded on the base, and the upper end of the column is connected to the beam with high-strength bolts.

Wherein, there are two beams, both ends of which are fixed to the column by bolts, the two beams are arranged in parallel, and a gap of 10 cm is left between the two beams.

Wherein, the fixed pulley is fixed on the upper end by a high-strength bolt, and the fixed pulley is fixed on the pulley seat by a pin shaft, and the movable pulley and the movable pulley block are fixed on the beam by a U-shaped bolt.

Wherein, the crossbeam leans against the lower part of the lifting winch to brace a diagonal brace, one end of the diagonal brace is fixed at the intersection of the column and the crossbeam, and the other end is fixed on the tower crane crossbeam.

The beneficial effects of the utility model are: compared with the prior art, the utility model uses the steel wire to pass through the portal frame and the fixed pulley block as the lifting structure, which can greatly utilize its own space, and solve the problem that the tower crane is inconvenient to disassemble the counterweight in the high altitude It is only necessary to start lifting the main winch, and use the interaction of the pulleys to disassemble it by itself, and disassemble the counterweight vertically to the ground. The structure is simple and the operation is convenient.

Description of drawings

Fig. 1 is the overall structure schematic diagram of a kind of hoisting mechanism of the present utility model;

Fig. 2 is a connection schematic diagram of a lifting mechanism balance arm, column and fixed pulley of the utility model.

The main component symbols are explained as follows:

1. Portal frame 2. Fixed pulley block

3. Lifting hoist 4. Tower cap fixed pulley block

5. Lifting hook 6. Steel rope

7. High-strength bolts 8. Diagonal braces

9. Tower crane beam 11. Balance arm

12. Column 13. Beam

21. Fixed pulley 22. Movable pulley

23. Mobile pulley block 111. Tower crane connecting beam,

112, base 113, plywood

211, pulley 212, pulley seat

213, bearing pin.

detailed description

In order to describe the utility model more clearly, the utility model will be further described below in conjunction with the accompanying drawings.

Please refer to Fig. 1-Fig. 2, the utility model provides a kind of hoisting mechanism, comprises gantry frame 1, fixed pulley group 2, hoist winch 3, tower cap fixed pulley group 4 and lifting hook 5; Arm 11, column 12 and crossbeam 13, balance arm 11 and column 12 are all provided with two, column 12 vertical direction is fixed on the balance arm 11, crossbeam 13 is fixed between two columns 12 to form portal frame 1, fixed The pulley block 2 is arranged on the beam 13, the fixed pulley block 2 includes a fixed pulley 21, a movable pulley 22 and a movable pulley block 23, the steel wire 6 rope on the hoist 3 passes through the fixed pulley block 4 of the tower cap, and reaches the fixed pulley 21 , and then through the mobile pulley block 23 and the movable pulley 22 successively, be fixed on the crossbeam steel rope fixed end after being connected with the lifting hook 5.

Compared with the prior art, the utility model uses the steel wire to pass through the portal frame and the fixed pulley block as the lifting mechanism, which can greatly utilize its own space and solve the problem that the tower crane is inconvenient to disassemble the counterweight in the high altitude, only need to start the lifting The main hoist can be disassembled by itself by using the interaction of pulleys, and the counterweight can be disassembled vertically to the ground, with simple structure and convenient operation.

In this embodiment, the balance arm 11 includes a tower crane connecting beam 111, a base 112 and a splint 113, through holes (not shown) are arranged at the corners of the base 112 and the splint 113, and the tower crane connecting beam 111 is clamped on Between the base 112 and the splint 113, the high-strength bolts 7 fasten the tower crane connecting beam 111, the base 112 and the splint 113 through through holes, the lower end of the column 12 is welded on the base 112, and the upper end of the column 12 is connected to the crossbeam 13 with high-strength bolts 7 , the two columns 12 have the same structure and height, and are connected by crossbeams 13 to form a door-shaped shelf. The structure is simple and fixed by high-strength bolts 7, which is more stable. It is also easy to assemble and disassemble, and is convenient for transportation. It is especially suitable for use in In high-rise buildings. In this embodiment, there are two beams 13, both ends of which are fixed to the column 12 by high-strength bolts 7, and the two beams 13 are arranged in parallel. In this embodiment, the upper end of the beam 13 is fixed to the fixed pulley 21 by high-strength bolts 7 And the movable pulley 22 and the movable pulley block 23 are fixed on the crossbeam 13 by U-shaped bolts (not shown), and the fixed pulley 21, the movable pulley 22 and the movable pulley block 23 are all fixed on the inboards of the two crossbeams 13, so in the two crossbeams Leave 10 centimeter gaps between 13, help to reduce the frictional force that two crossbeams 13 collide during the pulley running process, allow each pulley to run freely, fixed pulley 21 is fixed on the pulley seat 212 by bearing pin 213, and pulley seat 212 and There is also a certain gap between the pulleys 211, which is conducive to the free running of the pulleys.

In this embodiment, the fixed position between the column 12 and the crossbeam 13 close to the hoisting hoist 3 is in the shape of a "T", and the beam 13 extends outward for a section compared with the fixed position of the column 12 and the beam 13, and the distance between the column 12 and the beam 13 There is a diagonal strut 8 at the intersecting fixed end point, and the other end of the diagonal strut 8 is fixed on the tower crane beam 9. The setting of the diagonal strut 8 well fixes the portal frame 1, preventing the entire portal frame 1 from being damaged by steel. The reason for the action of the rope 6 and then the phenomenon of turning over.

The utility model has the advantages of:

1) Make full use of its own space, set up portal frames and fixed pulleys, movable pulleys and movable pulley blocks, which can well solve the problem that the tower crane is inconvenient to disassemble the counterweight at high altitude;

2) The portal frame has a simple structure, cooperates with the lifting main hoist and the fixed pulley block of the tower cap, and uses the interaction of the pulleys to disassemble by itself, and the counterweight is vertically disassembled to the ground. The operation is convenient and effortless, and the work burden is greatly reduced. ;

3) Diagonal struts are set to stabilize the gantry structure well, making the structure more stable and safer to use.

What is disclosed above is only one of the ways of implementing the utility model, and does not constitute a limitation on the rights of the patent. If those skilled in the art are inspired by it, without departing from the purpose of the utility model, they design implementation cases similar to the solution without creativity, which all belong to the protection scope of the utility model.

Claims (6)

1. a lifting mechanism, it is characterised in that include door type frame, fixed pulley group, the hoist engine that hoists, tower cap fixed pulley group and the hook that hoists；Described door type frame includes counter-jib, column and crossbeam, described counter-jib and column are equipped with two, described column vertical direction is fixed on counter-jib, described crossbeam is fixed between two columns formation door type structure, described fixed pulley group is arranged on crossbeam, described fixed pulley group includes a fixed pulley, a removable pulley and a mobile pulley group, the described steel wire penetrating tower cap fixed pulley group hoisted on hoist engine, reach at fixed pulley, sequentially pass through mobile pulley group and removable pulley again, after being connected with the hook that hoists, be fixed on the fixing end of crossbeam steel cable.

A kind of lifting mechanism the most according to claim 1, it is characterized in that, described counter-jib includes tower crane tie-beam, base and clamping plate, it is designed with through hole at the drift angle of described base and clamping plate, described tower crane tie-beam is clamped between base and clamping plate, and tower crane tie-beam, base and clamping plate are tightened together by high-strength bolt by through hole.

A kind of lifting mechanism the most according to claim 2, it is characterised in that described column lower end is welded on base, described column upper end high-strength bolt connecting cross beam.

A kind of lifting mechanism the most according to claim 3, it is characterised in that described crossbeam has two, and two ends are all bolted with column, and two crossbeams are arranged in parallel, and leaves 10 centimeters of gaps between two crossbeams.

A kind of lifting mechanism the most according to claim 4, it is characterised in that fixed pulley is fixed by high-strength bolt in described upper end, and described fixed pulley is fixed on pulley base by bearing pin, and described removable pulley and mobile pulley group are fixed on crossbeam by U-bolt.

A kind of lifting mechanism the most according to claim 1, it is characterised in that described crossbeam is by piece hound of diagonal brace below the hoist engine position that hoists, and described hound one end is fixed on the point of intersection of column and crossbeam, and the other end is fixed on tower crane crossbeam.