CN219603100U - Lifting overload protection device of crane - Google Patents

Abstract

The utility model discloses a lifting overload protection device of a crane, which relates to the technical field of cranes and comprises a crane top plate, a protection structure and a stabilizing structure, wherein an electric hoist is arranged at the middle position of the bottom end of the crane top plate, fixed sliding grooves are arranged on two sides of the bottom end of the crane top plate, a first sliding block is arranged in the fixed sliding grooves, a second protection rope is arranged at the bottom end of the first sliding block, the first protection rope is arranged on two sides of the electric hoist, hooks are connected to the bottom end of the electric hoist, the stabilizing structure is arranged on two sides of the bottom end of the electric hoist, and the protection structure is arranged between the first protection rope and the second protection rope. According to the utility model, the third connecting rope is tensioned, and the falling force is buffered to a certain extent under the reaction force of the fixed spring, so that the overload protection of the crane hoist is realized, and the falling of the heavy object caused by falling of the crane hoist is prevented.

Description

Lifting overload protection device of crane

Technical Field

The utility model relates to the technical field of cranes, in particular to a lifting overload protection device of a crane.

Background

An electric hoist crane belongs to a hoisting machine, and is a machine which performs circulating and intermittent motion. One cycle involves the object handling device lifting the object from the object handling site, then moving it horizontally to the designated location to lower the object, and then reversing the motion to return the object handling device to its original position for the next cycle, the electric hoist being a small lifting device with a lifting tool, i.e. a current collector, a speed reducer and a wire rope drum.

In the process of working of the crane, the electric hoist drives the steel wire rope to descend, the weight is lifted by the hook, and if the weight of the weight is overlarge, the crane is overloaded, and the electric hoist is easy to fall off to cause the weight to fall.

Disclosure of Invention

The utility model aims to provide a lifting overload protection device of a crane, which aims to solve the problem that the crane provided in the background art is overloaded, and an electric hoist is easy to fall off to cause heavy objects to fall off.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a lifting overload protection device of a crane comprises a crane top plate, a protection structure and a stabilizing structure;

the electric hoist is arranged at the middle position of the bottom end of the top plate of the crane, fixed sliding grooves are arranged on two sides of the bottom end of the top plate of the crane, first sliding blocks are arranged in the fixed sliding grooves, second protection ropes are arranged at the bottom ends of the first sliding blocks, first protection ropes are arranged on two sides of the electric hoist, hooks are connected to the bottom ends of the electric hoist, and the stable structures are arranged on two sides of the bottom end of the electric hoist;

the protection structures are positioned between the first protection rope and the second protection rope;

the protection architecture includes the second connecting plate, and the second connecting plate all installs in the top of first protection rope, the third is connected the rope in top intermediate position department installation of second connecting plate, and the first connecting plate is all installed in the bottom installation of second protection rope, the installation spout is all installed to both sides and the front and back both ends of first connecting plate bottom, and the inside of installation spout all is provided with the second slider, the slide bar is all installed to the bottom of second slider, and the outer wall of the inside slide bar of installation spout all overlaps and is equipped with fixation spring.

Preferably, the bottom ends of the first sliding blocks penetrate through the fixed sliding grooves and extend to the lower portion of the fixed sliding grooves, and the second protection ropes form a sliding structure with the fixed sliding grooves through the first sliding blocks.

Preferably, the top ends of the third connecting ropes extend to the bottom end of the first connecting plate, and the third connecting ropes are arranged at the middle position of the bottom end of the first connecting plate.

Preferably, the bottom of slide bar all passes the installation spout, and the bottom of slide bar all extends to the top of second connecting plate.

Preferably, the sliding rods are all installed at the top ends of the second connecting plates, and the sliding rods and the installation sliding grooves form a sliding structure through the second sliding blocks.

Preferably, the stable structure includes stable rope, winding roller, mounting panel, torsional spring and bull stick, the mounting panel is all installed in both ends around electric hoist bottom both sides, and all installs the bull stick through the pivot between the mounting panel, the winding roller is all installed to the outer wall of bull stick, and the outer wall of winding roller all twines has stable rope, the outer wall of bull stick all overlaps between winding roller and the mounting panel and is equipped with the torsional spring.

Preferably, the bottom ends of the stabilizing ropes extend to the front end and the rear end of the hook, and the stabilizing ropes are arranged at the front end and the rear end of the hook.

Preferably, the torsion springs are fixedly arranged between the winding roller and the mounting plate.

Compared with the prior art, the utility model has the beneficial effects that: the in-process that the electric hoist was removing takes place to overload and leads to droing, then under the effect of first protection rope, second protection rope and third connection rope, make the electric hoist, prevent that it from dropping, and at the in-process that the electric hoist descends, drive the second connecting plate through first protection rope, make the second connecting plate drive the slide bar, make the slide bar drive the second slider, make the inside of second slider at the installation spout move down, and make the compression of fixed spring, and make the third connection rope taut, under the reaction force of fixed spring, carry out the buffering of certain degree with the power of whereabouts, this structure has realized the overload protection to the electric hoist of hoist, prevent that it drops the heavy object that leads to.

Drawings

FIG. 1 is a schematic view of a front cross-sectional structure of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

fig. 4 is an enlarged schematic view of the structure of fig. 1B according to the present utility model.

In the figure: 1. a hook; 2. a first protection rope; 3. a second protection rope; 4. a first slider; 5. a crane top plate; 6. a fixed chute; 7. an electric hoist; 8. a second connecting plate; 9. a stabilizing structure; 901. a stabilizing rope; 902. winding a roller; 903. a mounting plate; 904. a torsion spring; 905. a rotating rod; 10. a slide bar; 11. installing a chute; 12. a second slider; 13. a first connection plate; 14. a fixed spring; 15. and a third connecting rope.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1: referring to fig. 1-4, a lifting overload protection device of a crane comprises a crane top plate 5, a protection structure and a stabilizing structure 9;

an electric hoist 7 is arranged at the middle position of the bottom end of the crane top plate 5, fixed sliding grooves 6 are arranged on two sides of the bottom end of the crane top plate 5, first sliding blocks 4 are arranged in the fixed sliding grooves 6, second protection ropes 3 are arranged at the bottom ends of the first sliding blocks 4, the bottom ends of the first sliding blocks 4 penetrate through the fixed sliding grooves 6 and extend to the lower side of the fixed sliding grooves 6, the second protection ropes 3 and the fixed sliding grooves 6 form a sliding structure, first protection ropes 2 are arranged on two sides of the electric hoist 7, hooks 1 are connected to the bottom ends of the electric hoist 7, and stabilizing structures 9 are located on two sides of the bottom ends of the electric hoist 7;

the protection structures are positioned between the first protection rope 2 and the second protection rope 3;

referring to fig. 1-4, a lifting overload protection device of a crane further includes a protection structure, the protection structure includes a second connection plate 8, the second connection plate 8 is all installed at the top end of the first protection rope 2, a third connection rope 15 is all installed at the middle position of the top end of the second connection plate 8, the bottom end of the second protection rope 3 is all installed with a first connection plate 13, both sides and front and rear ends of the bottom end of the first connection plate 13 are all installed with installation sliding grooves 11, the inside of the installation sliding grooves 11 is all provided with a second sliding block 12, the bottom end of the second sliding block 12 is all installed with a sliding rod 10, and the outer wall of the sliding rod 10 inside the installation sliding groove 11 is all sleeved with a fixed spring 14;

the top ends of the third connecting ropes 15 extend to the bottom end of the first connecting plate 13, and the third connecting ropes 15 are arranged at the middle position of the bottom end of the first connecting plate 13;

the bottom ends of the sliding rods 10 all penetrate through the mounting sliding grooves 11, and the bottom ends of the sliding rods 10 all extend to the top end of the second connecting plate 8;

the sliding rods 10 are all arranged at the top end of the second connecting plate 8, and the sliding rods 10 and the mounting sliding grooves 11 form a sliding structure through the second sliding blocks 12;

specifically, as shown in fig. 1, 2 and 4, when the mechanism is used, the first protection rope 2 drives the second connection plate 8, so that the second connection plate 8 drives the slide bar 10, the slide bar 10 drives the second slide block 12, the second slide block 12 moves downwards in the installation chute 11, the fixing spring 14 is compressed, the third connection rope 15 is tensioned, and the falling force is buffered to a certain extent under the reaction force of the fixing spring 14.

Example 2: the stabilizing structure 9 comprises a stabilizing rope 901, a winding roller 902, mounting plates 903, torsion springs 904 and a rotating rod 905, wherein the mounting plates 903 are respectively arranged at the front end and the rear end of the two sides of the bottom end of the electric hoist 7, the rotating rod 905 is respectively arranged between the mounting plates 903 through a rotating shaft, the winding roller 902 is respectively arranged on the outer wall of the rotating rod 905, the stabilizing rope 901 is respectively wound on the outer wall of the winding roller 902, and the torsion springs 904 are respectively sleeved on the outer wall of the rotating rod 905 between the winding roller 902 and the mounting plates 903;

the bottom ends of the stabilizing ropes 901 extend to the front end and the rear end of the hook 1, and the stabilizing ropes 901 are arranged at the front end and the rear end of the hook 1;

torsion springs 904 are fixedly mounted between the winding roller 902 and the mounting plate 903;

specifically, as shown in fig. 1, 2 and 3, when the mechanism is used, the hanger 1 is limited by the stabilizing rope 901, so that the hanger 1 is prevented from shaking, and when the hanger 1 is driven to ascend, the winding roller 902 winds the stabilizing rope 901 under the reaction force of the torsion spring 904.

Working principle: the electric hoist 7 drives the hook 1 to descend, the counterweight is lifted, the hook 1 descends, under the action of gravity, the stabilizing rope 901 is unwound from the outer wall of the winding roller 902, the torsion spring 904 is twisted tightly, the hook 1 is limited by the stabilizing rope 901, the hook 1 is prevented from shaking, and in the process of driving the hook 1 to ascend, the winding roller 902 winds the stabilizing rope 901 under the reaction force of the torsion spring 904;

if the electric hoist 7 is moving, the overload occurs to cause the falling off, the electric hoist 7 is lifted under the action of the first protection rope 2, the second protection rope 3 and the third connection rope 15, the falling off is prevented, the second connection plate 8 is driven by the first protection rope 2 in the falling process of the electric hoist 7, the slide rod 10 is driven by the second connection plate 8, the second slide block 12 is driven by the slide rod 10, the second slide block 12 moves downwards in the installation slide groove 11, the fixed spring 14 is compressed, the third connection rope 15 is tensioned, and the falling force is buffered to a certain extent under the reaction force of the fixed spring 14.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides a hoist overload protection device of hoist, includes hoist roof (5), its characterized in that: also comprises a protective structure and a stabilizing structure (9);

an electric hoist (7) is installed at the middle position of the bottom end of the crane top plate (5), fixed sliding grooves (6) are formed in two sides of the bottom end of the crane top plate (5), first sliding blocks (4) are arranged in the fixed sliding grooves (6), second protection ropes (3) are installed at the bottom ends of the first sliding blocks (4), first protection ropes (2) are installed at two sides of the electric hoist (7), hooks (1) are connected to the bottom end of the electric hoist (7), and stabilizing structures (9) are located at two sides of the bottom end of the electric hoist (7);

the protection structures are positioned between the first protection rope (2) and the second protection rope (3);

the protection architecture includes second connecting plate (8), and second connecting plate (8) all install in the top of first protection rope (2), third connecting rope (15) are all installed in the top intermediate position department of second connecting plate (8), and first connecting plate (13) are all installed in the bottom of second protection rope (3), installation spout (11) are all installed to both sides and the front and back both ends of first connecting plate (13) bottom, and the inside of installation spout (11) all is provided with second slider (12), slide bar (10) are all installed to the bottom of second slider (12), and the outer wall of the inside slide bar (10) of installation spout (11) all overlaps and is equipped with fixing spring (14).

2. A lifting overload protection device for a crane according to claim 1 and characterized in that: the bottom ends of the first sliding blocks (4) penetrate through the fixed sliding grooves (6) and extend to the lower portion of the fixed sliding grooves (6), and the second protection ropes (3) form a sliding structure with the fixed sliding grooves (6) through the first sliding blocks (4).

3. A lifting overload protection device for a crane according to claim 1 and characterized in that: the top ends of the third connecting ropes (15) extend to the bottom end of the first connecting plate (13), and the third connecting ropes (15) are arranged at the middle position of the bottom end of the first connecting plate (13).

4. A lifting overload protection device for a crane according to claim 1 and characterized in that: the bottom ends of the sliding rods (10) all penetrate through the installation sliding grooves (11), and the bottom ends of the sliding rods (10) all extend to the top ends of the second connecting plates (8).

5. A lifting overload protection device for a crane according to claim 1 and characterized in that: the sliding rods (10) are all installed at the top ends of the second connecting plates (8), and the sliding rods (10) and the installation sliding grooves (11) form a sliding structure through the second sliding blocks (12).

6. A lifting overload protection device for a crane according to claim 1 and characterized in that: the utility model discloses a stabilizing structure (9) including stabilizing rope (901), winding roller (902), mounting panel (903), torsional spring (904) and bull stick (905), both ends around electric hoist (7) bottom both sides are all installed to mounting panel (903), and all install bull stick (905) through the pivot between mounting panel (903), winding roller (902) are all installed to the outer wall of bull stick (905), and the outer wall of winding roller (902) all twines has stabilizing rope (901), the outer wall of bull stick (905) all overlaps between winding roller (902) and mounting panel (903) is equipped with torsional spring (904).

7. The lifting overload protection device of a crane of claim 6, wherein: the bottom of stabilizing rope (901) all extends to the front and back both ends of couple (1), and stabilizing rope (901) all installs in the front and back both ends of couple (1).

8. The lifting overload protection device of a crane of claim 6, wherein: the torsion springs (904) are fixedly arranged between the winding roller (902) and the mounting plate (903).