Synchronous lifting mechanism

Abstract

The synchronous lifting mechanism comprises a mounting frame and a driving assembly, the mounting frame is provided with a fixing frame and a cross beam, the driving assembly comprises a first chain wheel mounted on the cross beam, a second chain wheel mounted at the upper end of the fixing frame, a chain and a driving piece, and a hook is arranged at the first end of the chain; the second end of the chain sequentially passes through the first chain wheel and the second chain wheel, the driving piece is connected with the part, located at the downstream of the second chain wheel, of the chain, the connecting shaft is used for connecting the first chain wheels and / or the second chain wheels on the two adjacent mounting frames, and the stroke interlocking mechanism is used for the first chain wheels and / or the second chain wheels on the two adjacent mounting frames. Compared with the prior art, the synchronous lifting mechanism has the advantages that manual adjustment is not needed, the labor intensity of workers is reduced, the working efficiency of the synchronous lifting mechanism is not affected, meanwhile, the problem of tendency of the lifting points can be avoided as much as possible, and the lifting efficiency of the synchronous lifting mechanism is improved. And the safety risk is reduced.

Description

Technical Field

[0001] This application relates to the field of lifting mechanism technology, and in particular to a synchronous lifting mechanism. Background Technology

[0002] Although synchronous lifting mechanisms are widely used in industrial fields, they face the problem of asynchronous lifting of multiple lifting points after prolonged operation during rapid lifting, posing a risk of tipping over. Taking the synchronous lifting mechanism used in a vertical quenching furnace as an example, the synchronous lifting mechanism transfers the workpiece from the furnace to the quenching tank for quenching treatment. It is required to ensure the balance of multiple lifting points during rapid descent (the workpiece falls from a stationary state in the furnace to a height of 7m into the quenching tank in ≤15s) to ensure that the workpiece falls smoothly without falling during the lifting process.

[0003] Traditional synchronous lifting mechanisms typically use two hydraulic cylinders to provide driving force, relying on a hydraulic system (such as a hydraulic synchronous motor, synchronous valve, and proportional valve) to achieve synchronized operation of the two cylinders, thereby ensuring the synchronization of multiple lifting points. However, in practical engineering applications, traditional synchronous lifting mechanisms may experience lifting point tilting after load changes. Operators need to manually level all four lifting points before continued use, affecting the working efficiency of the synchronous lifting mechanism and increasing the operational difficulty and safety risks. Utility Model Content

[0004] This application proposes a synchronous lifting mechanism that can ensure the synchronicity of the lifting of multiple lifting points without requiring operators to level the multiple lifting points, thus ensuring the working efficiency of the synchronous lifting mechanism and reducing the operational difficulty and safety risks of the synchronous lifting mechanism.

[0005] To achieve the above objectives, this application provides a synchronous lifting mechanism, comprising:

[0006] The mounting frame has a fixed frame and a crossbeam. The lower end of the fixed frame is connected to the working surface of the lifting area, and the upper end of the fixed frame is connected to the crossbeam.

[0007] The drive assembly includes a first sprocket mounted on the crossbeam, a second sprocket mounted on the upper end of the fixed frame, a chain, and a drive member. The first end of the chain is provided with a hook for hanging a workpiece, and the second end of the chain passes through the first sprocket and the second sprocket in sequence. The drive member is connected to the portion of the chain located downstream of the second sprocket, and the drive member applies a pulling force to the chain.

[0008] It also includes a connecting shaft located between two adjacent mounting brackets, with both ends of the connecting shaft connected to the first sprocket and / or the second sprocket of the two adjacent mounting brackets, so that the movement speed of the chains of the two adjacent mounting brackets is consistent.

[0009] Preferably, in the above-described synchronous lifting mechanism, the drive assembly further includes a third sprocket, and the third sprocket and the second sprocket form a pulley system.

[0010] The third sprocket is located downstream of the second sprocket and is connected to the drive component, which drives the third sprocket to move up and down.

[0011] Preferably, in the above-mentioned synchronous lifting mechanism, at least two sets of pulley groups are arranged side by side along the length of the crossbeam.

[0012] The third sprockets of at least two sets of the pulley groups are connected to the driving member through a connecting block. The length direction of the connecting block is consistent with the length direction of the crossbeam. The middle part of the length direction of the connecting block is connected to the driving member. The third sprockets of at least two sets of the pulley groups are symmetrically distributed with respect to the connection position between the connecting block and the driving member.

[0013] Preferably, in the above-mentioned synchronous lifting mechanism, the third sprocket is connected to the connecting block via a rotating shaft and a bearing. The rotating shaft is fixedly connected to the third sprocket, and both ends of the rotating shaft are connected to the inner ring of the bearing, while the outer ring of the bearing is connected to the connecting block.

[0014] Preferably, in the above-described synchronous lifting mechanism, each drive component has at least two first sprockets, and the at least two first sprockets are arranged at intervals along the length of the crossbeam.

[0015] The number of rows of teeth on the second sprocket is at least equal to the number of teeth on the first sprocket.

[0016] Preferably, in the above-mentioned synchronous lifting mechanism, the number of rows of teeth on the third sprocket is at least equal to the number of teeth on the first sprocket, or the third sprocket is a single-row sprocket, and the number of the third sprocket is equal to the number of the first sprocket.

[0017] Preferably, in the above-mentioned synchronous lifting mechanism, the hooks of two adjacent mounting brackets that are in opposite positions are connected by a connecting rod.

[0018] Preferably, in the above-mentioned synchronous lifting mechanism, the connecting shaft is connected to the second sprocket via a coupling.

[0019] Preferably, in the above-mentioned synchronous lifting mechanism, the driving component is at least one of a telescopic cylinder, a lead screw assembly, or a gear and rack assembly.

[0020] Preferably, in the above-mentioned synchronous lifting mechanism, the fixed frame and the crossbeam are an integral structure, or the fixed frame and the crossbeam are separate structures.

[0021] The synchronous lifting mechanism provided in this application includes a mounting frame and a drive assembly. The mounting frame has a fixed frame and a crossbeam. The lower end of the fixed frame is connected to the working surface of the lifting area, and the upper end of the fixed frame is connected to the crossbeam. The drive assembly includes a first sprocket, a second sprocket, a chain, and a drive component. The first sprocket is mounted on the crossbeam, and the second sprocket is mounted on the upper end of the fixed frame. A hook is provided at the first end of the chain, and the second end of the chain passes through the first sprocket and the second sprocket in sequence. The drive component is connected to the portion of the chain downstream of the second sprocket, and the drive component applies tension to the chain. The synchronous lifting mechanism disclosed in this solution also includes a connecting shaft. The connecting shaft is used to connect the first sprocket and / or the second sprocket on two adjacent mounting frames. The connecting shaft is a stroke interlocking mechanism for the first sprocket and / or the second sprocket on two adjacent mounting frames. The connecting shaft transmits the movement of the first sprocket and / or the second sprocket on two adjacent mounting frames, so that the first sprocket and / or the second sprocket on the two adjacent mounting frames rotate synchronously and at the same speed. This makes the movement speed of the chain driven by the sprocket consistent when the workpiece rises and falls, effectively solving the problem of asynchronous lifting points. Compared with the method in related technologies that adjust the synchronous lifting mechanism after the lifting point tilt problem occurs, on the one hand, it does not require manual adjustment, reducing the intensity of manual labor, and does not affect the working efficiency of the synchronous lifting mechanism. On the other hand, it can avoid the lifting point tilt problem as much as possible, reducing safety risks. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0023] Figure 1 This is a structural schematic diagram of the synchronous lifting mechanism of this application;

[0024] Figure 2 This is the front view of the synchronous lifting mechanism of this application;

[0025] Figure 3 This is a top view of the synchronous lifting mechanism of this application.

[0026] The attached diagram is described below:

[0027] 1-Mounting bracket; 11-Fixed bracket; 12-Crossbeam; 2-First sprocket; 3-Second sprocket; 4-Chain; 5-Drive component; 6-Hook; 7-Connecting shaft; 8-Third sprocket; 9-Connecting rod; 10-Coupling. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0029] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features.

[0030] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0031] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0032] This solution discloses a synchronous lifting mechanism, including a mounting frame 1 and a drive assembly, wherein a drive component 5 is mounted on the mounting frame 1.

[0033] like Figure 1As shown, the mounting frame 1 has a fixed frame 11 and a crossbeam 12. The lower end of the fixed frame 11 is connected to the working surface of the lifting area, and the upper end of the fixed frame 11 is connected to the crossbeam 12. The end of the crossbeam 12 that is not connected to the fixed frame 11 is a free end, and the crossbeam 12 is located above the lifting area.

[0034] The working surface of the lifting area can be the ground or the platform of other equipment. The working surface of the lifting area can be a plane or an inclined plane. Optionally, the fixing frame 11 is anchored to the working surface of the lifting area. The fixing frame 11 can be perpendicular to the working surface of the lifting area or not.

[0035] The shape of the fixing frame 11 can be designed according to the weight of the workpiece to ensure the strength of the fixing frame 11; the crossbeam 12 is straight.

[0036] The mounting bracket 11 and the crossbeam 12 are L-shaped. The crossbeam 12 and the mounting bracket 11 can be arranged perpendicularly or non-perpendicularly. The shape of the mounting bracket 1 is not limited to the above embodiment and can also be other forms, which are not specifically limited here.

[0037] In this design, the fixing frame 11 and the crossbeam 12 can be an integral structure or separate structures. In an embodiment where the fixing frame 11 and the crossbeam 12 are separate structures, the fixing frame 11 and the crossbeam 12 are welded together or connected by bolts.

[0038] The drive assembly is mounted on the mounting bracket 1. The drive assembly includes a first sprocket 2, a second sprocket 3, a chain 4, and a drive component 5. The first sprocket 2 is mounted on the crossbeam 12, the second sprocket 3 is mounted on the upper end of the fixed bracket 11, the first end of the chain 4 is provided with a hook 6 for hanging workpieces, the second end of the chain 4 passes through the first sprocket 2 and the second sprocket 3 in sequence, and the drive component 5 is connected to the part of the chain 4 located downstream of the second sprocket 3, and the drive component 5 applies tension to the chain 4.

[0039] The synchronous lifting mechanism disclosed in this solution has a lifting point below the first sprocket 2 of the drive assembly, and a fixed pulley 3 used to change the direction of the tension force exerted by the drive component on the chain 4. Specifically, when the drive component 5 applies tension to the chain 4, pulling the chain 4 downward, the chain 4 drives the second sprocket 3 and the first sprocket 2 to rotate, and finally the hook 6 moves the workpiece upward; when the drive component 5 does not apply tension to the chain 4, the chain 4 moves downward under its own weight and the weight of the workpiece, the chain 4 drives the first sprocket 2 and the second sprocket 3 to rotate, and finally the workpiece moves downward.

[0040] The synchronous lifting mechanism disclosed in this solution also includes a connecting shaft 7, which is used to connect the first sprocket 2 and / or the second sprocket 3 on two adjacent mounting frames 1 so that the movement speed of the chain 4 on the two adjacent mounting frames 1 is consistent.

[0041] The connecting shaft 7 is used to connect the first sprocket 2 and / or the second sprocket 3 on two adjacent mounting brackets 1, specifically as follows:

[0042] The first sprockets 2 on two adjacent mounting brackets 1 are connected by a connecting shaft 7; or,

[0043] The second sprockets 3 on two adjacent mounting brackets 1 are connected by a connecting shaft 7; or,

[0044] The first sprockets 2 on two adjacent mounting brackets 1 are connected by a connecting shaft 7, and the second sprockets 3 on two adjacent mounting brackets 1 are connected by a connecting shaft 7.

[0045] The connecting shaft 7 is a stroke interlocking mechanism for the first sprocket 2 and / or the second sprocket 3 on two adjacent mounting frames 1. The connecting shaft 7 transmits the movement of the first sprocket 2 and / or the second sprocket 3 on two adjacent mounting frames 1, so that the first sprocket 2 and / or the second sprocket 3 on the two adjacent mounting frames 1 rotate synchronously and at the same speed, thereby making the chain 4 driven by the sprocket move at the same speed when the workpiece rises and falls.

[0046] The rotation of the first sprocket 2 and / or the second sprocket 3 on the two adjacent mounting frames 1 is adjusted by connecting shaft 7. The adjustment process is carried out in real time by adjusting the movement of the first sprocket 2 and / or the second sprocket 3 on the two adjacent mounting frames 1 during the rotation of the first sprocket 2 and / or the second sprocket 3 on the two adjacent mounting frames 1. Compared with the method in related technologies that adjusts after the lifting point tilt problem occurs, on the one hand, manual adjustment is not required, which reduces the intensity of manual labor and does not affect the working efficiency of the synchronous lifting mechanism. On the other hand, it can avoid the lifting point tilt problem as much as possible and reduce safety risks.

[0047] The synchronous lifting mechanism disclosed in this solution interlocks the rotation of the first sprocket 2 and / or the second sprocket 3 on two adjacent mounting frames 1 through the connecting shaft 7. When the hooks 6 of two adjacent mounting frames 1 bear different loads, the connecting shaft 7 can also make the movement speed of the chain 4 of the drive assembly on the two adjacent mounting frames 1 consistent, effectively solving the problem of asynchronous movement of multiple lifting points.

[0048] After the connecting shaft 7 is connected to the first sprocket 2 and / or the second sprocket 3, the connecting shaft 7 rotates synchronously with the first sprocket 2 and / or the second sprocket 3, and the connecting shaft 7 does not rotate relative to the first sprocket 2 and / or the second sprocket 3.

[0049] In some embodiments, the connecting shaft 7 is connected to the first sprocket 2 and / or the second sprocket 3 via a coupling 10. The coupling 10 is a component used to connect two shafts in different mechanisms so that they rotate together to transmit torque.

[0050] In some embodiments, the connecting shaft 7 is welded to the first sprocket 2 and / or the second sprocket 3, or the connecting shaft 7 is keyed to the first sprocket 2 and / or the second sprocket 3, or the connecting shaft 7 is interference-fitted to the first sprocket 2 and / or the second sprocket 3.

[0051] The connection method between the connecting shaft 7 and the second sprocket 3 is not limited to the above embodiment. It can also be other connection methods that enable the connecting shaft 7 to move together with the first sprocket 2 and / or the second sprocket 3, and the connecting shaft 7 and the second sprocket 3 do not move relative to each other. No specific limitation is made here.

[0052] The drive component 5 is connected to the portion of the chain 4 located downstream of the second sprocket 3. It should be noted that the downstream of the second sprocket 3 is the position close to the second end of the chain 4 from the first end to the second end of the chain 4. The portion of the chain 4 located downstream of the second sprocket 3 is the part of the chain 4 located between the second sprocket 3 and the second end of the chain 4. The length of this portion will change as the chain 4 moves.

[0053] The drive component 5 is connected to the portion of the chain 4 downstream of the second sprocket 3. This connection can be either direct or in some embodiments. In some embodiments, the drive component 5 is connected to the second end of the chain 4, and the drive component 5 pulls the second end of the chain 4. In other embodiments, the second end of the chain 4 is slidably connected to the fixing frame 11, and the drive component 5 is connected to the portion of the chain 4 between the second sprocket 3 and the second end of the chain 4. Alternatively, the drive component 5 can be connected to the chain 4 via a third sprocket 8. In some embodiments, the second end of the chain 4 is fixedly connected to the fixing frame 11, and the third sprocket 8 is provided on the portion of the chain 4 between the second sprocket 3 and the second end of the chain 4. The third sprocket 8 is connected to the drive component 5, and the drive component 5 drives the third sprocket 8 to move up and down.

[0054] In an embodiment where a third sprocket 8 is provided in the portion of chain 4 between the second sprocket 3 and the second end of chain 4, the drive assembly further includes the third sprocket 8. The second sprocket 3 and the third sprocket 8 form a pulley group. The third sprocket 8 is located downstream of the second sprocket 3. As a movable pulley, the third sprocket 8 does not change the direction of the force, but it can shorten the driving stroke of the drive component 5, improve the efficiency of the synchronous lifting mechanism, reduce the driving force of the drive component 5, reduce energy consumption, and improve the overall performance of the synchronous lifting mechanism.

[0055] The drive assembly has at least one set of pulleys consisting of a second sprocket 3 and a third sprocket 8, which are arranged side by side along the length of the crossbeam 12.

[0056] In an embodiment where the drive assembly has a pulley system consisting of a second sprocket 3 and a third sprocket 8, the driving force of the drive component 5 can be reduced by half, thus reducing the driving cost of the drive component 5. Furthermore, the driving stroke of the drive component 5 can be shortened by half, achieving a lifting efficiency of twice the differential speed.

[0057] In embodiments where the drive assembly has two sets of pulleys consisting of a second sprocket 3 and a third sprocket 8, such as Figure 1 As shown, the driving force of the drive component 5 is 1 / 4 of the original driving force, which reduces the driving cost of the drive component 5. Moreover, the driving stroke is 1 / 4 of the original driving stroke, achieving a four-fold differential lifting efficiency.

[0058] In an embodiment where the drive assembly has a set of pulleys, the third sprocket 8 is connected to the drive member 5 via a connecting block. The third sprocket 8 is located at the middle of the length direction of the connecting block, and the middle of the length direction of the connecting block is connected to the drive member 5. The length direction of the connecting block is consistent with the length direction of the crossbeam 12.

[0059] In an embodiment where the drive assembly has at least two sets of pulleys, the length direction of the connecting block is consistent with the length direction of the crossbeam 12, the middle part of the length direction of the connecting block is connected to the drive member 5, at least two third sprockets 8 are connected to the drive member 5 through the connecting block, and the drive member 5 drives at least two third sprockets 8 to move simultaneously through the connecting block, and the at least two third sprockets 8 are symmetrically distributed with respect to the connection position between the connecting block and the drive member 5.

[0060] The drive component 5 is connected to the middle of the connecting block, and the third sprocket 8 is symmetrically distributed relative to the connection position between the connecting block and the drive component 5. This ensures that the connecting block is evenly stressed on both sides of the drive component 5, thereby improving the stability of the drive assembly.

[0061] The third sprocket 8 is connected to the connecting block via a bearing and a shaft. Specifically, the shaft is connected to the third sprocket 8, both ends of the shaft are connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the connecting block.

[0062] The connection method between the connecting block and the third sprocket 8 is not limited to the above embodiment, and can also be other connection methods, which are not specifically limited here.

[0063] In embodiments where the drive element 5 has at least two sets of pulley groups consisting of a second sprocket 3 and a third sprocket 8, the second sprocket 3 of at least one set of pulley groups is connected to the connecting shaft 7.

[0064] The first sprocket 2 can be a single-row sprocket, a double-row sprocket, or a multi-row sprocket.

[0065] The number of first sprockets 2 in the drive assembly is equal to the number of lifting points on the mounting frame 1. There are at least two first sprockets 2 on the crossbeam 12 to form at least two lifting points on the mounting frame 1. The synchronous lifting mechanism has at least two mounting frames 1, such that the synchronous lifting mechanism has at least four lifting points. Two adjacent mounting frames 1 are arranged side-by-side.

[0066] In some embodiments, such as Figure 2 As shown, the drive assembly has two first sprockets 2, which are spaced apart along the length of the crossbeam 12 and staggered in the direction perpendicular to the length of the crossbeam 12. The second sprocket 3 and the third sprocket 8 are both double-row sprockets, with two teeth of each sprocket corresponding to one of the two first sprockets 2. There are two chains 4. The first ends of the two chains 4 are equipped with hooks 6. The two chains 4 engage with the two first sprockets 2 respectively, and then the two sprockets are fixed to the fixing frame 11 after engaging with the teeth of the second sprocket 3 and the third sprocket 8.

[0067] The driving component 5 drives the third sprocket 8 to move, which in turn drives the two chains 4 to move. These chains 4 then drive the second sprocket 3 and the two first sprockets 2, achieving synchronous movement of the two hooks 6. One driving component 5 drives two chains 4 to move, and the stroke of the two chains 4 is consistent, so the movement distance of the two lifting points located on the same mounting bracket 1 is consistent. The consistency of movement of the chains 4 on two adjacent mounting brackets 1 is achieved by the connecting shaft 7.

[0068] When the number of first sprockets 2 in the drive assembly is more than two, more than three lifting points will be formed on the mounting bracket 1. The second sprocket 3 is a multi-row sprocket with at least the same number of teeth as the first sprocket 2. The third sprocket 8 is a multi-row sprocket with at least the same number of teeth as the first sprocket 2. The number of chains 4 is equal to the number of first sprockets 2.

[0069] In some embodiments, the number of first sprockets 2 is at least two, and the number of second sprockets 3 and third sprockets 8 can also be single-row sprockets, with the number of second sprockets 3 and third sprockets 8 being equal to the number of first sprockets 2, so as to achieve synchronous transmission of multiple chains 4.

[0070] In some embodiments, such as Figure 1 and Figure 3 As shown, two adjacent mounting brackets 1 with opposite hooks 6 are connected by a connecting rod 9 to further improve the consistency of the lifting speed and height of the two hooks 6. Optionally, the connecting rod 9 is a rigid rod.

[0071] The openings of the hooks 6 on two adjacent mounting brackets 1 face the same direction.

[0072] The drive component 5 is at least one of a telescopic cylinder, a lead screw assembly, or a gear and rack assembly. The types of drive components 5 installed on the fixing brackets 11 of two adjacent mounting brackets 1 may be the same or different.

[0073] When the drive component 5 is a telescopic cylinder, the fixing frame 11 has a fixing seat for fixing the cylinder body of the telescopic cylinder. The cylinder body is hinged to the fixing seat to prevent damage to the telescopic cylinder due to displacement. The telescopic cylinder can be a hydraulic cylinder, and the extension and retraction of the hydraulic cylinder is controlled by controlling the flow of hydraulic oil through a hydraulic station.

[0074] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A synchronous lifting mechanism, characterized in that, include: The mounting frame (1) has a fixed frame (11) and a crossbeam (12), the lower end of the fixed frame (11) is connected to the working surface of the lifting area, and the upper end of the fixed frame (11) is connected to the crossbeam (12). The drive assembly includes a first sprocket (2) mounted on the crossbeam (12), a second sprocket (3) mounted on the upper end of the fixed frame (11), a chain (4), and a drive member (5). The first end of the chain (4) is provided with a hook (6) for hanging workpieces. The second end of the chain (4) passes through the first sprocket (2) and the second sprocket (3) in sequence. The drive member (5) is connected to the part of the chain (4) located downstream of the second sprocket (3). The drive member (5) applies tension to the chain (4). It also includes a connecting shaft (7) located between two adjacent mounting brackets (1), with the two ends of the connecting shaft (7) connected to the first sprocket (2) and / or the second sprocket (3) of the two adjacent mounting brackets (1) respectively, so that the movement speed of the chain (4) of the two adjacent mounting brackets (1) is consistent.

2. The synchronous lifting mechanism according to claim 1, characterized in that, The drive assembly also includes a third sprocket (8), which, together with the second sprocket (3), forms a pulley system. The third sprocket (8) is located downstream of the second sprocket (3) and connected to the drive member (5), which drives the third sprocket (8) to move up and down.

3. The synchronous lifting mechanism according to claim 2, characterized in that, At least two sets of pulleys are arranged side by side along the length of the crossbeam (12). At least two sets of the pulley groups have their third sprockets (8) connected to the drive member (5) via a connecting block. The length direction of the connecting block is consistent with the length direction of the crossbeam (12). The middle part of the length direction of the connecting block is connected to the drive member (5). The third sprockets (8) of at least two sets of the pulley groups are symmetrically distributed relative to the connection position between the connecting block and the drive member (5).

4. The synchronous lifting mechanism according to claim 3, characterized in that, The third sprocket (8) is connected to the connecting block via a shaft and a bearing. The shaft is fixedly connected to the third sprocket (8). Both ends of the shaft are connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the connecting block.

5. The synchronous lifting mechanism according to any one of claims 2-4, characterized in that, Each of the drive components has at least two first sprockets (2), and at least two first sprockets (2) are arranged at intervals along the length of the crossbeam (12). The number of rows of teeth on the second sprocket (3) is at least equal to the number of teeth on the first sprocket (2).

6. The synchronous lifting mechanism according to claim 5, characterized in that, The number of rows of teeth on the third sprocket (8) is at least equal to the number of teeth on the first sprocket (2), or the third sprocket (8) is a single-row sprocket and the number of teeth on the third sprocket (8) is equal to the number of teeth on the first sprocket (2).

7. The synchronous lifting mechanism according to claim 1, characterized in that, The hooks (6) of two adjacent mounting brackets (1) are connected by a connecting rod (9).

8. The synchronous lifting mechanism according to claim 1, characterized in that, The connecting shaft (7) is connected to the second sprocket (3) via a coupling (10).

9. The synchronous lifting mechanism according to claim 1, characterized in that, The drive component (5) is at least one of a telescopic cylinder, a lead screw assembly, or a gear and rack assembly.

10. The synchronous lifting mechanism according to claim 1, characterized in that, The fixing frame (11) and the crossbeam (12) are an integral structure, or the fixing frame (11) and the crossbeam (12) are separate structures.

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