CN219906684U - Lifting appliance mechanism - Google Patents

Abstract

The utility model discloses a lifting appliance mechanism, which comprises a lifting appliance frame; the rotating assembly is rotationally arranged on the lifting tool frame, and a groove body for installing a rope is formed in the rotating assembly along the circumferential direction; and the guardrail assembly is used for preventing the rope from being separated from the groove body when being loosened, and is rotationally connected with the lifting tool frame so as to turn over and open to one side of the lifting tool frame. When the rotating assembly needs maintenance operations such as overhauling, lubricating or replacing, the guardrail assembly is turned over to one side of the lifting tool frame and can be maintained, after the maintenance operation is finished, the guardrail assembly is turned back again, the guardrail assembly is not required to be detached from the lifting tool frame, time and labor are saved, the working strength of operators is reduced, and the maintenance operation of rotating parts is facilitated.

Description

Lifting appliance mechanism

Technical Field

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a lifting appliance mechanism.

Background

At present, in a wharf or a transport port, general goods are placed in containers, and the containers are hoisted and transported by a crane. With the rapid development of container transportation, container cranes also tend to be large in size, high in speed and high in efficiency. Container gantry cranes are the primary equipment for container handling operations. The container gantry crane has the characteristics of safety, high efficiency, reliability and the like, and becomes an important device for container transportation. The container gantry crane is provided with a lifting structure, the lifting mechanism is mainly lifted by a lifting tool frame, a rotating piece is arranged on the lifting tool frame and is connected with the crane through a steel wire rope, and when the steel wire rope is loosened, the steel wire rope is easy to fall off from a sliding groove of the rotating piece.

The prior Chinese patent with the bulletin number of CN204751961U discloses a groove outlet preventing device for a steel wire rope of an upper frame of a field bridge lifting appliance, which comprises two end frames fixedly arranged at the left side and the right side of a side plate of the upper frame respectively and a middle frame fixedly arranged at the middle upper part of the side plates of the two upper frames, wherein the end frames comprise side bottom plates fixedly connected with the front side and the rear side plates, crosspieces fixedly arranged above the side bottom plates and spaced with rotating pieces are fixedly arranged on the middle frame, the middle frame comprises two side support plates fixedly connected with the front side and the rear side plates, two positioning plates with two ends fixed with the side support plates and spaced with the side support plates respectively, and an isolating mechanism fixedly arranged between the two positioning plates, wherein the isolating mechanism isolates the steel wire ropes of the two rotating pieces and limits the steel wire ropes to prevent the steel wire ropes from outlet.

The groove outlet preventing device prevents the steel wire rope from falling out of the groove of the rotating piece by arranging the end frames and the middle frame, but the device has some problems, for example, when maintenance operations such as overhauling, lubricating or replacing the rotating piece of the lifting appliance are carried out, the two end frames and the middle frame are required to be detached respectively, and the disassembly and the assembly are time-consuming and labor-consuming and have high labor intensity. In view of this, how to design a lifting device technology which facilitates the maintenance operation of the rotating member is a technical problem to be solved by the present utility model.

Disclosure of Invention

The utility model provides a lifting appliance mechanism, which is convenient to maintain and operate a pulley of the lifting appliance mechanism.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme:

in one aspect, the present utility model provides a spreader mechanism comprising:

a hanger frame;

the rotating assembly is rotationally arranged on the lifting tool frame, and a groove body for installing a rope is formed in the rotating assembly along the circumferential direction; and, a step of, in the first embodiment,

and the guardrail assembly is used for preventing the rope from being separated from the groove body when being loosened, and is rotationally connected with the lifting tool frame so as to turn over and open to one side of the lifting tool frame.

Compared with the prior art, the utility model has the advantages and positive effects that: through setting up hoist frame, rotating assembly and guardrail subassembly, rotating assembly rotates to set up in hoist frame, rotates the cell body that the subassembly is equipped with along circumference and is used for installing the rope, and guardrail subassembly is used for preventing that the rope from releasing the cell body when loosening; the guardrail component is rotationally connected with the lifting frame, when the rotating component needs maintenance operations such as maintenance, lubrication or replacement, the guardrail component is turned over to one side of the lifting frame and can be opened for maintenance operations on the rotating component, after the maintenance operations are completed, the guardrail component is turned back again, the guardrail component is not required to be detached from the lifting frame entirely, time and labor are saved, the working strength of operators is reduced, and the maintenance operations of rotating components are facilitated.

In some embodiments of the present utility model, the rotating assembly includes a first pulley and a second pulley, the first pulley and the second pulley are rotatably disposed in the hanger frame side by side, a first rope is disposed in a groove of the first pulley, and a second rope is disposed in a groove of the second pulley;

the guardrail assembly comprises a first guardrail and a second guardrail, wherein the first guardrail is used for preventing the first rope from being separated from the groove body of the first pulley when being loosened, and the second guardrail is used for preventing the second rope from being separated from the groove body of the second pulley when being loosened;

one end of the first guardrail is rotationally connected with one end of the lifting tool frame so as to turn over and open to one side of the lifting tool frame; one end of the second guardrail is rotationally connected with the other end of the lifting tool frame so as to turn over and open to the other side of the lifting tool frame;

the other end of the first guardrail is fastened with the other end of the second guardrail through a connecting piece.

Through setting up first pulley, second pulley, first guardrail and second guardrail, first guardrail is used for preventing that first rope from releasing the cell body that breaks away from first pulley when releasing, and second guardrail is used for preventing that the second rope from releasing the cell body that breaks away from the second pulley when releasing, and one end and the one end of hoist frame of first guardrail rotate to be connected, and first guardrail can overturn to one side of hoist frame and open, and one end and the other end of hoist frame of second guardrail rotate to be connected, and the second guardrail can overturn to the opposite side of hoist frame and open; the other end of the first guardrail is fastened with the other end of the second guardrail through a connecting piece; thus, the first guardrail and the second guardrail are turned over and opened towards the two sides of the lifting appliance frame respectively, and maintenance operations such as overhauling, lubricating and replacing can be performed on the first pulley and the second pulley;

when the first guardrail and the second guardrail are turned back towards the middle part of the lifting tool frame respectively, the first guardrail and the second guardrail are fastened by the connecting piece, so that the protection of the first pulley and the second pulley can be realized, the first rope is prevented from falling out of the groove body of the first pulley, and the second rope is prevented from falling out of the groove body of the second pulley.

In some embodiments of the utility model, the guardrail assembly further comprises:

and the spacer is arranged between the other end of the first guardrail and the other end of the second guardrail and is used for separating the adjacent first ropes from the second ropes.

Through setting up the spacer between the other end of first guardrail and the other end of second guardrail, the spacer separates adjacent first rope and second rope, reduces the friction between first rope and the second rope.

In some embodiments of the utility model, the connector comprises a bolt.

Through the other end with first guardrail and the other end of second guardrail pass through bolted connection, the other end of first guardrail and the other end of second guardrail can be dismantled and be connected promptly, make things convenient for the dismouting.

In some embodiments of the utility model, one end of the first rail is pivotally connected to one end of the hanger frame and one end of the second rail is pivotally connected to the other end of the hanger frame by a hinge.

One end of the first guardrail is connected with one end of the lifting appliance frame through a hinge; and one end of the second guardrail is connected with the other end of the lifting tool frame through a hinge, so that the first guardrail and the second guardrail can rotate corresponding lifting tool frames conveniently.

In some embodiments of the utility model, the first guard rail and the second guard rail each comprise:

the connecting plate is rotationally connected with the lifting tool frame;

the first fence body is arranged at the upper end of the connecting plate; and, a step of, in the first embodiment,

the second fence body is arranged at the upper end of the connecting plate and is parallel to the first fence body;

a gap allowing the first rope and the second rope to pass through is arranged between the first fence body and the second fence body.

The first guardrail and the second guardrail are arranged to comprise the connecting plate, the first guardrail body and the second guardrail body, and the connecting plate is rotationally connected with the lifting appliance frame, so that the first guardrail and the second guardrail can be rotationally connected with the lifting appliance frame; the first fence body is arranged at the upper end of the connecting plate, the second fence body is arranged at the upper end of the connecting plate and is parallel to the first fence body, a gap is arranged between the first fence body and the second fence body, and the first rope and the second rope can conveniently pass through the gap.

In some embodiments of the present utility model, the first and second rail bodies each comprise a vertical section, an arc section, and a horizontal section connected in sequence;

the vertical section is connected with the connecting plate, the curvature of the arc section is matched with the outer edge of the first pulley or the second pulley, and the horizontal section is parallel to the connecting line of the circle centers of the first pulley and the second pulley.

Through setting up the vertical section, arc section and the horizontal segment that are connected in proper order with first fence body and second fence body, vertical section is connected with the connecting plate, and the curvature of arc section matches with the outer fringe of first pulley or second pulley, and the horizontal segment is parallel with the centre of a circle line of first pulley and second pulley, and like this first fence body and second fence body set up respectively in the outside of first pulley and second pulley, on the one hand, can reduce the occupation space of first fence body and second fence body, on the other hand, can play the guard action to first pulley and second pulley, prevent that other personnel from being close to first pulley and second pulley.

In some embodiments of the utility model, the angle between the arc segment and the center of the first pulley or the second pulley is 90 °.

The included angle between the arc section and the circle center of the first pulley or the second pulley is set to 90 degrees, so that the curvature of the arc section and the outer edge of the first pulley or the second pulley is consistent, and the attractiveness of the guardrail assembly is improved.

In some embodiments of the utility model, the first guardrail and the second guardrail each further comprise:

the connecting rod is arranged between the first fence body and the second fence body and is positioned on the vertical section.

Through setting up the connecting rod between first fence body and second fence body, the connecting rod is located vertical section, and like this, when first rope and second rope were released, first rope and the second rope that are located the hoist frame both sides can be taken on the connecting rod, prevent that first rope from deviating from the cell body of first pulley to and prevent that the second rope from deviating from the cell body of second pulley.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a spreader mechanism according to the present utility model;

FIG. 2 is a schematic view of the partial structure of the area A in FIG. 1;

FIG. 3 is a schematic view of the partial structure of the region B in FIG. 1;

FIG. 4 is a front view of another spreader mechanism provided by the present utility model;

FIG. 5 is a left side view of another spreader mechanism provided by the present utility model;

fig. 6 is a schematic view of an open configuration of a guardrail assembly of another spreader mechanism provided by the present utility model.

Reference numerals illustrate:

a hanger frame 1;

a rotating assembly 2, a first pulley 21, a first rope 211, a second pulley 22, a second rope 221;

the guardrail assembly 3,

the first guardrail 31, the connecting plate 311, the first guardrail body 312, the second guardrail body 313 and the connecting rod 314;

the second side rail 32 is provided with a first side rail,

a spacer 33;

vertical segment 3121, arcuate segment 3122, and horizontal segment 3123.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. 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.

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 6, in one aspect, the present utility model provides a spreader mechanism comprising a spreader frame 1, a swivel assembly 2 and a guard rail assembly 3.

The rotating component 2 is rotatably arranged on the lifting tool frame 1, and a groove body for installing ropes is formed in the rotating component 2 along the circumferential direction;

the guardrail assembly 3 is used for preventing the rope from being separated from the groove body when being loosened, and the guardrail assembly 3 is rotatably connected with the lifting tool frame 1 so as to be turned over and opened to one side of the lifting tool frame 1.

It should be noted that the spreader frame 1 shown in fig. 1 is not shown completely, but only a partial structure of the spreader frame.

Specifically, through set up guardrail subassembly 3 on hoist frame 1, guardrail subassembly 3 is used for preventing breaking away from the circumference cell body of rotating assembly 2 when rope is relaxed, guardrail subassembly 3 rotates with hoist frame 1 to be connected, and guardrail subassembly 3 can be opened to one side upset of hoist frame 1, like this, the operation personnel only need when maintaining operations such as overhauling, lubrication or change rotating assembly 2 with guardrail subassembly 3 upset open can, need not pull down guardrail subassembly 3, labour saving and time saving, convenient operation has reduced operation personnel's working strength.

Specifically, during installation, the rotating assembly 2 is firstly installed at a corresponding position on the lifting tool frame 1, then the guardrail assembly 3 is installed on the lifting tool frame 1, and finally the rope passes through the guardrail assembly 3 and is installed in the circumferential groove of the rotating assembly 2. When maintenance operations such as overhauling, lubricating or replacing are required for the rotating assembly 2, the specific operation process is as follows: firstly, the guardrail assembly 3 is turned over and opened towards one side of the lifting appliance frame 1, then the ropes are loosened, whether the ropes are detached from the groove body or not is determined according to actual conditions, and finally maintenance operation is carried out.

It will be appreciated that the ends of the rope are connected to a crane by which the rope is driven to be stretched or unwound.

As shown in fig. 4 and 6, in some embodiments of the present utility model, the rotating assembly 2 includes a first pulley 21 and a second pulley 22, the ropes include a first rope 211 and a second rope 221, the first pulley 21 and the second pulley 22 are rotatably disposed in the hanger frame 1 side by side, the first rope 211 is disposed in a groove of the first pulley 21, and the second rope 221 is disposed in a groove of the second pulley 22;

as shown in connection with fig. 6, the guardrail assembly 3 includes a first guardrail 31 for preventing the first rope 211 from being released from the groove of the first pulley 21 and a second guardrail 32 for preventing the second rope 221 from being released from the groove of the second pulley 22;

one end of the first guard rail 31 is rotatably connected with one end of the hanger frame 1 to turn over to one side of the hanger frame 1; one end of the second guardrail 32 is rotatably connected with the other end of the lifting appliance frame 1 so as to turn over and open to the other side of the lifting appliance frame 1;

as shown in conjunction with fig. 1 and 3, the other end of the first barrier 31 and the other end of the second barrier 32 are fastened by a connector.

Specifically, through rotating first pulley 21 and second pulley 22 side by side and setting up in hoist frame 1, set up first rope 211 in the cell body of first pulley 21, set up second rope 221 in the cell body of second pulley 22, the atress of single pulley is too big can be avoided to two pulleys, has improved the security.

By providing the first fence 31 and the second fence 32, the first fence 31 can prevent the first rope 211 from being separated from the groove of the first pulley 21 when it is released, and the second fence 32 can prevent the second rope 221 from being separated from the groove of the second pulley 22 when it is released; one end of the first guardrail 31 is rotationally connected with one end of the lifting tool frame 1, the first guardrail 31 can be turned over and opened to one side of the lifting tool frame 1, one end of the second guardrail 32 is rotationally connected with the other end of the lifting tool frame 1, and the second guardrail 32 can be turned over and opened to the other side of the lifting tool frame 1; in this way, the first guard rail 31 and the second guard rail 32 are turned and opened towards the two sides of the lifting appliance frame 1 respectively, so that the maintenance work of the first pulley 21 and the second pulley 22 is facilitated;

when the first guard rail 31 and the second guard rail 32 are turned back towards the middle of the hanger frame 1 respectively, the protection of the first pulley 21 and the second pulley 22 and the prevention of the first rope 211 from falling out of the groove of the first pulley 21 and the prevention of the second rope 221 from falling out of the groove of the second pulley 22 can be realized by fastening with the connecting piece.

In some embodiments of the utility model, the guardrail assembly 3 further comprises a spacer 33;

a spacer 33 is provided between the other end of the first rail 31 and the other end of the second rail 32 for separating the adjacent first and second ropes 211 and 221.

Specifically, in general, the first rope 211 and the second rope 221 are both steel wires, and when the first rope 211 and the second rope 221 are loosened, the first rope 211 and the second rope 221 located between the first pulley 21 and the second pulley 22 may rub against each other, causing damage to the first rope 211 and the second rope 221, and by providing a spacer 33 between the other end of the first rail 31 and the other end of the second rail 32, the spacer 33 separates adjacent first rope 211 and second rope 221, so that friction between the first rope 211 and the second rope 221 may be reduced;

on the other hand, the spacer 33 can prevent the first rope 211 from coming out of the groove of the first pulley 21 and prevent the second rope 221 from coming out of the groove of the second pulley 22.

In some embodiments of the utility model, the connector comprises a bolt.

Specifically, through passing through bolted connection the other end of first guardrail 31 with the other end of second guardrail 32, the other end of first guardrail 31 and the other end of second guardrail 32 can dismantle the connection promptly, make things convenient for the dismouting.

It is understood that the connection includes, but is not limited to, a bolt.

In other embodiments of the utility model, as shown in connection with fig. 2, one end of the first rail 31 is pivotally connected to one end of the spreader frame 1 and one end of the second rail 32 is pivotally connected to the other end of the spreader frame 1 by a hinge.

Specifically, one end of the first guard rail 31 is connected with one end of the hanger frame 1 through a hinge; and one end of the second guardrail 32 is connected with the other end of the lifting frame 1 through a hinge, so that the first guardrail 31 and the second guardrail 32 can rotate relative to the lifting frame 1 conveniently.

It will be appreciated that the end of the first rail 31 and the end of the spreader frame 1 and the end of the second rail 32 and the other end of the spreader frame 1 are not limited to a pivotal connection by a hinge and other forms of pivotal connection are within the scope of the utility model.

Illustratively, the first body 312 and the second body 313 are symmetrically disposed.

In an embodiment of the present utility model, as shown in connection with fig. 6, the first rail 31 and the second rail 32 each include a connection plate 311, a first rail body 312, and a second rail body 313.

The connecting plate 311 is rotationally connected with the lifting tool frame 1;

the first fence 312 is disposed at the upper end of the connecting plate 311;

the second fence 313 is disposed at the upper end of the connecting plate 311 and parallel to the first fence 312;

a gap allowing the first rope 211 and the second rope 221 to pass through is provided between the first rail 312 and the second rail 313.

Specifically, the first guard rail 31 and the second guard rail 32 each include a connecting plate 311, a first rail body 312 and a second rail body 313, the connecting plate 311 is rotationally connected with the hanger frame 1, and the first guard rail 31 and the second guard rail 32 can be rotationally connected with the hanger frame 1; the first fence 312 is disposed at the upper end of the connecting plate 311, the second fence 313 is disposed at the upper end of the connecting plate 311 and parallel to the first fence 312, and a gap is disposed between the first fence 312 and the second fence 313, so as to facilitate the first rope 211 and the second rope 221 to pass through.

In some embodiments of the utility model, the bolt connection is added between the connecting plate 311 and the lifting tool frame 1 on the basis of the rotation connection, so that the connection strength can be enhanced, and the bolt connection is convenient to assemble and disassemble.

As shown in connection with fig. 6, in some embodiments of the present utility model, the first and second columns 312 and 313 each include a vertical segment 3121, an arc segment 3122, and a horizontal segment 3123 that are sequentially connected;

wherein the vertical segment 3121 is connected with the connection plate 311, the curvature of the arc segment 3122 is matched with the outer edge of the first pulley 21 or the second pulley 22, and the horizontal segment 3123 is parallel with the center line of the first pulley 21 and the second pulley 22.

Specifically, by arranging the first and second rail bodies 312 and 313 as the vertical, arc and horizontal sections 3121 and 3122 and 3123 that are sequentially connected, the vertical section 3121 is connected to the connection plate 311, the curvature of the arc section 3122 is matched with the outer edge of the first or second pulley 21 and 22, and the horizontal section 3123 is parallel to the center line of the first and second pulleys 21 and 22, so that, on one hand, the occupied space of the first and second rail bodies 312 and 313 can be reduced; on the other hand, the first pulley 21 and the second pulley 22 can be protected, other people are prevented from approaching the first pulley 21 and the second pulley 22, and safety of the people is guaranteed.

Illustratively, the vertical segment 3121 is connected perpendicular to the connection plate 311.

In some embodiments of the present utility model, the arc-shaped segment 3122 is 90 ° from the center of the first pulley 21 or the second pulley 22.

Specifically, by setting the included angle between the arc-shaped segment 3122 and the center of the first pulley 21 or the second pulley 22 to 90 °, the curvature of the arc-shaped segment 3122 and the outer edge of the first pulley 21 or the second pulley 22 is consistent, and the beauty of the guardrail assembly 3 is improved.

As shown in connection with fig. 5, in some embodiments of the utility model, both the first 31 and second 32 guardrails also include a connecting rod 314.

The connecting rod 314 is disposed between the first rail 312 and the second rail 313, and the connecting rod 314 is located at the vertical segment 3121.

Specifically, by providing the connecting rod 314 between the first rail body 312 and the second rail body 313, the connecting rod 314 is positioned at the vertical section 3121, so that when the first rope 211 and the second rope 221 are loosened, the first rope 211 and the second rope 221 positioned at both sides of the hanger frame 1 can be caught on the connecting rod 314, preventing the first rope 211 from coming out of the groove of the first pulley 21 and preventing the second rope 221 from coming out of the groove of the second pulley 22.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (9)

1. A spreader mechanism comprising:

a hanger frame;

the rotating assembly is rotationally arranged on the lifting tool frame, and a groove body for installing a rope is formed in the rotating assembly along the circumferential direction; and, a step of, in the first embodiment,

and the guardrail assembly is used for preventing the rope from being separated from the groove body when being loosened, and is rotationally connected with the lifting tool frame so as to turn over and open to one side of the lifting tool frame.

2. The spreader mechanism of claim 1, wherein,

the rotating assembly comprises a first pulley and a second pulley, the first pulley and the second pulley are arranged in the lifting tool frame in parallel in a rotating mode, a first rope is arranged in a groove body of the first pulley, and a second rope is arranged in a groove body of the second pulley;

the guardrail assembly comprises a first guardrail and a second guardrail, wherein the first guardrail is used for preventing the first rope from being separated from the groove body of the first pulley when being loosened, and the second guardrail is used for preventing the second rope from being separated from the groove body of the second pulley when being loosened;

one end of the first guardrail is rotationally connected with one end of the lifting tool frame so as to turn over and open to one side of the lifting tool frame; one end of the second guardrail is rotationally connected with the other end of the lifting tool frame so as to turn over and open to the other side of the lifting tool frame;

the other end of the first guardrail is fastened with the other end of the second guardrail through a connecting piece.

3. The spreader mechanism of claim 2, wherein the guard rail assembly further comprises:

and the spacer is arranged between the other end of the first guardrail and the other end of the second guardrail and is used for separating the adjacent first ropes from the second ropes.

4. The spreader mechanism of claim 3, wherein the connector comprises a bolt.

5. The spreader mechanism of claim 2, wherein one end of the first rail is pivotally connected to one end of the spreader frame and one end of the second rail is pivotally connected to the other end of the spreader frame by a hinge.

6. The spreader mechanism of claim 2, wherein the first guard rail and the second guard rail each comprise:

the connecting plate is rotationally connected with the lifting tool frame;

the first fence body is arranged at the upper end of the connecting plate; and, a step of, in the first embodiment,

the second fence body is arranged at the upper end of the connecting plate and is parallel to the first fence body;

a gap allowing the first rope and the second rope to pass through is arranged between the first fence body and the second fence body.

7. The spreader mechanism of claim 6, wherein the first rail and the second rail each comprise a vertical section, an arcuate section, and a horizontal section that are sequentially connected;

the vertical section is connected with the connecting plate, the curvature of the arc section is matched with the outer edge of the first pulley or the second pulley, and the horizontal section is parallel to the connecting line of the circle centers of the first pulley and the second pulley.

8. The spreader mechanism of claim 7, wherein the arc-shaped segment is at an angle of 90 ° to the center of the first pulley or the second pulley.

9. The spreader mechanism of claim 7, wherein the first guard rail and the second guard rail each further comprise:

the connecting rod is arranged between the first fence body and the second fence body and is positioned on the vertical section.