Hoisting mechanism and hoisting system

Abstract

The invention relates to the technical field of hoisting equipment, and provides a hoisting mechanism and a hoisting system.The hoisting mechanism comprises a hoisting support, a winding drum, a driving assembly and two hoisting assemblies, the winding drum and the driving assembly are arranged on the hoisting support, the output end of the driving assembly is in transmission connection with the winding drum, and the two hoisting assemblies are symmetrically arranged on the two sides of the winding drum; the lifting assembly comprises a first sling, a second sling, a first fixed pulley block, a second fixed pulley block, a first movable pulley block and a second movable pulley block. The first movable pulley block and the second movable pulley block are arranged below the lifting support in the first direction in a spaced mode. The first sling is wound around the first fixed pulley block and the first movable pulley block, and the second sling is wound around the first fixed pulley block, the second fixed pulley block and the second movable pulley block. The hoisting mechanism and the hoisting system provided by the invention solve the defects that the synchronism is poor when a steel wire rope between hoisting points of an existing single quadruple winding drum is hoisted, and a hoisting tool is easy to incline in the hoisting process.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and in particular to a lifting mechanism and a lifting system. Background Art

[0002] Lifting equipment has been widely used in the field of material handling in the national economy, and its lifting mechanism has various structural forms. At present, common multi-lifting point cranes mainly include two double drums and a single quadruple drum. The structure of two double drums is relatively loose, which will cause great inconvenience when used in an environment with limited working space. The single quadruple drum has become a more common design form in European cranes due to its compact structure.

[0003] However, the existing single quadruple drum has unreasonable layout of the pulley block and the winding method of the steel cable, which leads to poor synchronization of the steel wire ropes between the lifting points during lifting, making the lifting device prone to tilting during the lifting process. Summary of the invention

[0004] The invention provides a lifting mechanism and a lifting system, which are used to solve the defect that the steel wire ropes between the lifting points of the existing single quadruple drum are poorly synchronized during lifting, so that the lifting device is prone to tilt during the lifting process.

[0005] On the one hand, the present invention provides a lifting mechanism, including: a lifting bracket, a drum, a driving assembly and two lifting assemblies, the drum and the driving assembly are both arranged on the lifting bracket, the output end of the driving assembly is transmission connected to the drum to drive the drum to rotate, and the two lifting assemblies are symmetrically arranged on both sides of the drum.

[0006] The lifting assembly includes a first sling, a second sling, a first fixed pulley group, a second fixed pulley group, a first movable pulley group and a second movable pulley group. The first sling and the second sling are both wound around the drum. The first fixed pulley group and the second fixed pulley group are spaced apart on the lifting bracket along the first direction. The first movable pulley group and the second movable pulley group are spaced apart below the lifting bracket along the first direction.

[0007] The first sling is wound around the first fixed pulley group and the first movable pulley group, the second sling is wound around the first fixed pulley group, the second fixed pulley group and the second movable pulley group, and the first sling is wound around the first movable pulley group the same number of times as the second sling is wound around the second movable pulley group.

[0008] According to the lifting mechanism provided by the present invention, the first fixed pulley group includes a first fixed pulley, a second fixed pulley and a third fixed pulley, the second fixed pulley group includes a fourth fixed pulley and a fifth fixed pulley, the first movable pulley group includes a first movable pulley and a second movable pulley, and the second movable pulley group includes a third movable pulley and a fourth movable pulley.

[0009] The first sling is sequentially wound around the first fixed pulley, the first movable pulley, the second fixed pulley, and the second movable pulley, and the second sling is sequentially wound around the third fixed pulley, the fifth fixed pulley, the third movable pulley, the fourth fixed pulley, and the fourth movable pulley.

[0010] According to the lifting mechanism provided by the present invention, the first fixed pulley, the second fixed pulley and the third fixed pulley are arranged side by side, the fourth fixed pulley and the fifth fixed pulley are arranged side by side, the first movable pulley and the second movable pulley are arranged side by side, and the third movable pulley and the fourth movable pulley are arranged side by side.

[0011] According to the lifting mechanism provided by the present invention, the first fixed pulley block and the second fixed pulley block are both arranged on the top of the lifting bracket.

[0012] According to the lifting mechanism provided by the present invention, the axis center of the drum is located higher than the axis centers of the first fixed pulley group and the second fixed pulley group, so that the first sling can pass through the upper part of the first fixed pulley group, and the second sling can pass through the upper part of the first fixed pulley group and the second fixed pulley group.

[0013] According to the lifting mechanism provided by the present invention, a support seat is provided on the lifting bracket, one end of the reel is rotatably matched with the support seat, and the other end of the reel is connected to the output end of the driving assembly.

[0014] According to the lifting mechanism provided by the present invention, the driving assembly includes a motor and a reducer, the output end of the motor is connected to the reducer, and the output end of the reducer is connected to the drum.

[0015] The lifting mechanism provided according to the present invention further includes a sling, and the first movable pulley block and the second movable pulley block are both connected to the sling.

[0016] The lifting mechanism provided according to the present invention further comprises an anti-sway guide column, one end of which is connected to the sling, and the other end of which is vertically slidably matched with the lifting bracket.

[0017] Another aspect of the present invention provides a lifting system, comprising a track and a lifting mechanism as described in any one of the above items, wherein the lifting bracket is in sliding cooperation with the track.

[0018] The lifting mechanism and lifting system provided by the present invention can make the horizontal component forces generated by the oblique pulling of the corresponding first and second cables in the two lifting components offset each other, and the horizontal resultant force of the cables as a whole is zero, and through the reasonable arrangement of the fixed and movable pulley groups, and the reasonable setting of the winding of the first and second cables, the lengths of the outgoing and incoming cables of the four cables in the two lifting components are kept consistent, thereby improving the verticality of the lifting action.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is one of the schematic diagrams of the lifting mechanism provided by the embodiment of the present invention.

[0022] Figure 2 This is the second schematic diagram of the lifting mechanism provided by the embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the winding of the first sling and the second sling in the lifting mechanism provided by an embodiment of the present invention.

[0024] Reference numerals: 10. Lifting bracket; 110. Support seat; 120. Guide groove; 20. Reel; 30. Drive assembly; 310. Motor; 320. Reducer; 330. Brake; 40. Lifting assembly; 410. First sling; 420. Second sling; 430. First fixed pulley block; 431. First fixed pulley; 432. Second fixed pulley; 433. Third fixed pulley; 440. Second fixed pulley block; 441. Fourth fixed pulley; 442. Fifth fixed pulley; 450. First movable pulley block; 451. First movable pulley; 452. Second movable pulley; 460. Second movable pulley block; 461. Third movable pulley; 462. Fourth movable pulley; 470. Hoisting device; 50. Anti-sway guide column. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Combine the following Figures 1 to 3 The present invention describes a lifting mechanism and a lifting system.

[0031] See also Figures 1 to 3 As shown, the lifting mechanism provided by the embodiment of the present invention includes: a lifting bracket 10, a drum 20, a driving assembly 30 and two lifting assemblies 40. The drum 20 and the driving assembly 30 are both arranged on the lifting bracket 10. The output end of the driving assembly 30 is transmission-connected with the drum 20 to drive the drum 20 to rotate. The two lifting assemblies 40 are symmetrically arranged on both sides of the drum 20.

[0032] The lifting assembly 40 includes a first sling 410, a second sling 420, a first fixed pulley set 430, a second fixed pulley set 440, a first movable pulley set 450 and a second movable pulley set 460. The first sling 410 and the second sling 420 are both wound around the drum 20. The first fixed pulley set 430 and the second fixed pulley set 440 are arranged at intervals along the first direction on the lifting bracket 10. The first movable pulley set 450 and the second movable pulley set 460 are arranged at intervals along the first direction below the lifting bracket 10.

[0033] The first sling 410 is wound around the first fixed pulley set 430 and the first movable pulley set 450, and the second sling 420 is wound around the first fixed pulley set 430, the second fixed pulley set 440 and the second movable pulley set 460. The number of times the first sling 410 is wound around the first movable pulley set 450 is the same as the number of times the second sling 420 is wound around the second movable pulley set 460.

[0034] It should be noted that the above-mentioned “the first sling 410 is wound around the first fixed pulley group 430 and the first movable pulley group 450” means that the first sling 410 is wound around the first fixed pulley group 430 and the first movable pulley group 450 at least once (it can be once or multiple times, the same below), and each time the first sling 410 is wound around the first fixed pulley group 430, it is wound around different fixed pulleys in the first fixed pulley group 430, and each time the first sling 410 is wound around the first movable pulley group 450, it is wound around different movable pulleys in the first movable pulley group 450. Similarly, the above-mentioned “the second sling 420 is wrapped around the first fixed pulley set 430, the second fixed pulley set 440 and the second movable pulley set 460” means that the second sling 420 is wrapped around the first fixed pulley set 430, the second fixed pulley set 440 and the second movable pulley set 460 at least once, and each time the second sling 420 is wrapped around the first fixed pulley set 430, it is wrapped around different fixed pulleys in the first fixed pulley set 430, each time the second sling 420 is wrapped around the second fixed pulley set 440, it is wrapped around different fixed pulleys in the second fixed pulley set 440, and each time the second sling 420 is wrapped around the second movable pulley set 460, it is wrapped around different movable pulleys in the second movable pulley set 460.

[0035] The above-mentioned “first direction” specifically refers to Figure 1 Direction of arrow shown in .

[0036] The lifting mechanism and lifting system provided by the present invention are such that two lifting components 40 are symmetrically arranged on both sides of the drum 20, and the first sling 410 is wound around the first fixed pulley group 430 and the first movable pulley group 450, and the second sling 420 is wound around the first fixed pulley group 430, the second fixed pulley group 440 and the second movable pulley group 460. The number of times the first sling 410 is wound around the first movable pulley group 450 is the same as the number of times the second sling 420 is wound around the second movable pulley group 460. The horizontal component forces generated by the oblique pulling of the corresponding first sling 410 and the corresponding second sling 420 in the two lifting components can offset each other, and the overall horizontal resultant force of the slings is zero. Through the reasonable arrangement of the fixed pulley group and the movable pulley group, and the reasonable setting of the winding of the first sling 410 and the second sling 420, the lengths of the outgoing and collected cables of the four slings in the two lifting components are kept consistent, thereby improving the verticality of the lifting action.

[0037] Specifically, in this embodiment, the drum 20 is combined with two first slings 410 and two second slings 420 in the lifting assembly 40 to form a single four-unit drum. The rotation of the drum 20 can drive the first slings 410 and the second slings 420 to be lowered or wound on the drum 20.

[0038] Each lifting assembly 40 includes a first fixed pulley block 430, a second fixed pulley block 440, a first movable pulley block 450, and a second movable pulley block 460. The first fixed pulley block 430 and the second fixed pulley block 440 each include a plurality of fixed pulleys arranged side by side and rotatable independently, and the first movable pulley block 450 and the second movable pulley block 460 each include a plurality of movable pulleys arranged side by side and rotatable independently.

[0039] The first fixed pulley block 430 is arranged on the side of the lifting bracket 10 away from the drum 20, and the second fixed pulley block 440 is arranged on the side of the lifting bracket 10 close to the drum 20. Two first movable pulley blocks 450 and two second movable pulley blocks 460 are arranged on the upper surface of the sling 470 in a rectangular array. Among them, the first movable pulley block 450 is located directly below the corresponding first fixed pulley block 430, and the second movable pulley block 460 is located directly below the corresponding second fixed pulley block 440. The first movable pulley block 450 and the second movable pulley block 460 of the two lifting assemblies can lift four different points of the sling 470.

[0040] The ends of the first sling 410 and the second sling 420 are both connected to fixed points (hereinafter referred to as fixed ends) provided at corresponding positions of the lifting bracket 10 .

[0041] The first sling 410 and the second sling 420 can be selected according to the load conditions. For example, when the load is heavy, a sling such as a steel cable can be used, and when the load is light, a sling such as a synthetic fiber rope (such as polyester and polypropylene) can be used.

[0042] See also Figures 1 to 3 As shown, according to some embodiments of the present invention, the first fixed pulley group 430 includes a first fixed pulley 431, a second fixed pulley 432 and a third fixed pulley 433, the second fixed pulley group 440 includes a fourth fixed pulley 441 and a fifth fixed pulley 442, the first movable pulley group 450 includes a first movable pulley 451 and a second movable pulley 452, and the second movable pulley group 460 includes a third movable pulley 461 and a fourth movable pulley 462; the first sling 410 is sequentially wound around the first fixed pulley 431, the first movable pulley 451, the second fixed pulley 432, and the second movable pulley 452, and the second sling 420 is sequentially wound around the third fixed pulley 433, the fifth fixed pulley 442, the third movable pulley 461, the fourth fixed pulley 441 and the fourth movable pulley 462.

[0043] The winding method of the first sling 410 and the second sling 420 of the two lifting assemblies 40 is shown in Figure 3 shown.

[0044] The first sling 410: drum 20 - first fixed pulley 431 - first movable pulley 451 - second fixed pulley 432 - second movable pulley 452 - fixed end.

[0045] The second sling 420: drum 20 - third fixed pulley 433 - fifth fixed pulley 442 - third movable pulley 461 - fourth fixed pulley 441 - fourth movable pulley 462 - fixed end.

[0046] By winding the first sling 410 and the second sling 420 in the above manner, the pressure exerted by the slings on the fixed pulley group can be dispersed to different fixed pulleys, thereby reducing the pressure on a single fixed pulley. It can also be made that each of the first sling 410 and the second sling 420 has two fulcrums at the corresponding position of the sling 470. When the sling 470 lifts heavy objects, the load-bearing capacity is more evenly distributed, which can better share the load and reduce the pressure on a single sling, thereby enhancing the load-bearing capacity of the entire system.

[0047] In addition, by winding the first sling 410 and the second sling 420 in the above manner, while ensuring that the first sling 410 and the second sling 420 are wound around the movable pulley the same number of times, it can be ensured that the number of windings of the slings between each lifting point is the same, so that the slings have the same rising rate during the lifting process, which not only improves the stability and safety of the crane, but also reduces the risk of the sling 470 being skewed during the lifting process.

[0048] See also Figures 1 to 3 As shown, according to some embodiments of the present invention, the first fixed pulley 431, the second fixed pulley 432 and the third fixed pulley 433 are arranged side by side, the fourth fixed pulley 441 and the fifth fixed pulley 442 are arranged side by side, the first movable pulley 451 and the second movable pulley 452 are arranged side by side, and the third movable pulley 461 and the fourth movable pulley 462 are arranged side by side.

[0049] By arranging the fixed pulleys in the fixed pulley block and the movable pulleys in the movable pulley blocks side by side, the pulley block structure can be made compact, and the sling can move smoothly between different pulleys, thereby achieving more uniform load distribution.

[0050] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the first fixed pulley set 430 and the second fixed pulley set 440 are both arranged on the top of the lifting support 10.

[0051] In a conventional lifting mechanism, a fixed pulley block is disposed at the bottom of the lifting support 10, and operators can only rely on lifting equipment to transfer operations between different fixed pulley blocks, which is difficult to operate and has a high risk factor. In the present invention, by disposing the first fixed pulley block 430 and the second fixed pulley block 440 at the top of the lifting support 10, operators can directly inspect and maintain the first fixed pulley block 430 and the second fixed pulley block 440 at the top of the lifting support 10, which can simplify and improve the operating efficiency and improve the safety factor during operation.

[0052] Specifically, a crossbeam is provided on the lifting bracket 10, and a corresponding number of mounting seats are provided on the crossbeam at intervals. The mounting seats are used to install and fix the first fixed pulley group 430 and the second fixed pulley group 440, and enable each fixed pulley to rotate freely.

[0053] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the axis center of the drum 20 is located higher than the axis centers of the first fixed pulley set 430 and the second fixed pulley set 440, so that the first sling 410 can pass through the upper part of the first fixed pulley set 430, and the second sling 420 can pass through the upper part of the first fixed pulley set 430 and the second fixed pulley set 440.

[0054] When the sling is passed over the upper part of the corresponding fixed pulley block, it can adapt to the situation where the fixed pulley block is arranged on the top of the lifting bracket 10, and the friction resistance between the sling and the fixed pulley can be reduced, thereby improving the lifting efficiency and reducing the energy required for lifting. In addition, the friction between the sling and the fixed pulley can be reduced, the wear can be reduced, and the service life of the sling and the fixed pulley can be extended.

[0055] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, a support seat 110 is provided on the lifting bracket 10, one end of the drum 20 is rotatably matched with the support seat 110, and the other end of the drum 20 is connected to the output end of the driving assembly 30.

[0056] By providing a support base 110 on the lifting bracket 10 , the support base 110 can be used to support and fix the drum 20 , and the axial center position of the drum 20 can be raised to a position higher than the axial centers of the first fixed pulley group 430 and the second fixed pulley group 440 .

[0057] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the driving assembly 30 includes a motor 310 and a reducer 320 , the output end of the motor 310 is connected to the reducer 320 , and the output end of the reducer 320 is connected to the reel 20 .

[0058] Specifically, the motor 310 is a single output shaft motor 310, whose output shaft is connected to the input end of the reducer 320, and the output end of the reducer 320 is connected to the reel 20. The speed of the reel 20 is adjusted to within a set range by the reducer 320, which is conducive to ensuring the stability of the lifting mechanism during operation. At the same time, the reducer 320 can also increase the output torque, so that the motor 310 can handle a larger load, thereby meeting the lifting requirements.

[0059] In addition, a brake 330 can be provided between the motor 310 and the reducer 320 and / or between the reducer 320 and the reel 20 as required, so that the brake 330 can be used to stop the operation of the equipment in an emergency to prevent accidents. Functional components such as an overspeed switch and an encoder can also be provided at the tail of the motor 310.

[0060] See also Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the lifting mechanism further includes an anti-sway guide column 50, one end of which is connected to the sling 470, and the other end of which is vertically slidably matched with the lifting bracket 10.

[0061] By providing the anti-sway guide column 50 , the lifting device 470 can be guided when it is lifted, thereby preventing the lifting device 470 from shaking.

[0062] Specifically, in this embodiment, a guide groove 120 is provided in the middle of the lifting bracket 10, and one end of the anti-sway guide column 50 is passed through the guide groove 120 and is limited by the guide groove 120 to prevent the spreader 470 from deflecting when moving vertically. In addition, each fixed pulley block and each movable pulley block are located on the periphery of the anti-sway guide column 50, which can make the lifting mechanism more compact as a whole.

[0063] The lifting system provided by the present invention is described below. The lifting system described below and the lifting mechanism described above can be referred to each other.

[0064] The lifting system provided in the embodiment of the present invention comprises a track (such as a vehicle track, etc.) and a lifting mechanism as described in any of the above embodiments, and the lifting bracket 10 is slidably matched with the track.

[0065] The lifting system provided by the present invention adopts the lifting mechanism of the above-mentioned embodiment. Therefore, the horizontal component forces generated by the oblique pulling of the corresponding first sling 410 and the corresponding second sling 420 in the two lifting assemblies can offset each other, and the overall horizontal resultant force of the slings is zero. Through the reasonable arrangement of the fixed pulley group and the movable pulley group, and the reasonable setting of the winding of the first sling 410 and the second sling 420, the lengths of the outgoing and incoming cables of the four slings in the two lifting assemblies are kept consistent, thereby improving the verticality of the lifting action.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lifting mechanism, characterized in that: include: A lifting bracket, a reel, a driving assembly and two lifting assemblies, wherein the reel and the driving assembly are both arranged on the lifting bracket, the output end of the driving assembly is drivingly connected with the reel to drive the reel to rotate, and the two lifting assemblies are symmetrically arranged on both sides of the reel; The lifting assembly comprises a first sling, a second sling, a first fixed pulley block, a second fixed pulley block, a first movable pulley block and a second movable pulley block, the first sling and the second sling are both wound around the drum, the first fixed pulley block and the second fixed pulley block are spaced apart on the lifting bracket along the first direction, and the first movable pulley block and the second movable pulley block are spaced apart below the lifting bracket along the first direction; The first sling is wound around the first fixed pulley group and the first movable pulley group, the second sling is wound around the first fixed pulley group, the second fixed pulley group and the second movable pulley group, and the first sling is wound around the first movable pulley group the same number of times as the second sling is wound around the second movable pulley group.

2. The lifting mechanism according to claim 1, characterized in that: The first fixed pulley group includes a first fixed pulley, a second fixed pulley and a third fixed pulley, the second fixed pulley group includes a fourth fixed pulley and a fifth fixed pulley, the first movable pulley group includes a first movable pulley and a second movable pulley, and the second movable pulley group includes a third movable pulley and a fourth movable pulley; The first sling is sequentially wound around the first fixed pulley, the first movable pulley, the second fixed pulley, and the second movable pulley, and the second sling is sequentially wound around the third fixed pulley, the fifth fixed pulley, the third movable pulley, the fourth fixed pulley, and the fourth movable pulley.

3. The lifting mechanism according to claim 2, characterized in that: The first fixed pulley, the second fixed pulley and the third fixed pulley are arranged side by side, the fourth fixed pulley and the fifth fixed pulley are arranged side by side, the first movable pulley and the second movable pulley are arranged side by side, and the third movable pulley and the fourth movable pulley are arranged side by side.

4. The lifting mechanism according to claim 1, characterized in that: The first fixed pulley block and the second fixed pulley block are both arranged on the top of the lifting support.

5. The lifting mechanism according to claim 4, characterized in that: The axis of the drum is located higher than the axis of the first fixed pulley block and the second fixed pulley block, so that the first sling can pass over the upper part of the first fixed pulley block, and the second sling can pass over the upper part of the first fixed pulley block and the second fixed pulley block.

6. The lifting mechanism according to claim 5, characterized in that: A support seat is provided on the lifting bracket, one end of the reel is rotatably matched with the support seat, and the other end of the reel is connected to the output end of the driving component.

7. The lifting mechanism according to any one of claims 1 to 6, characterized in that: The driving assembly includes a motor and a reducer, the output end of the motor is connected to the reducer, and the output end of the reducer is connected to the reel.

8. The lifting mechanism according to any one of claims 1 to 6, characterized in that: It also includes a sling, and the first movable pulley group and the second movable pulley group are both connected to the sling.

9. The lifting mechanism according to claim 8, characterized in that: It also includes an anti-sway guide column, one end of which is connected to the hanger, and the other end of which is vertically slidably matched with the lifting bracket.

10. A lifting system, characterized in that: It comprises a track and a lifting mechanism as claimed in any one of claims 1 to 9, wherein the lifting bracket is slidably matched with the track.

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