Panel lifting device and panel lifting system

Abstract

The present disclosure relates to the field of heavy machinery, and particularly relates to a plate lifting device and a plate lifting system. The plate lifting device comprises a base, a holder and a mounting piece. The holder surrounds the base and is arranged on the base in a liftable manner. The mounting piece is fixedly connected with the holder and has a plurality of mounting holes arranged in a vertical direction in sequence and at intervals. The mounting holes are configured to fix the plate through fasteners. The plate lifting device provided by the present disclosure has a simple structure. The mounting piece is fixed with the plate through fasteners, and is connected with the holder and performs lifting movement relative to the base. In this process, since the plate performs lifting movement relative to the base, the plate is prevented from swinging, the butt joint of the plate can be quickly realized, and the splicing efficiency of the plate is improved.

Description

Technical Field

[0001] This disclosure relates to the field of heavy machinery, and in particular to a plate lifting device and plate lifting system. Background Technology

[0002] Sheet metals are widely used in many fields such as construction, furniture manufacturing, decoration, and industrial manufacturing. For example, the splicing of large segmented cylindrical bodies requires welding multiple sections of sheet metal together.

[0003] Traditional splicing methods mainly use hoisting to achieve alignment and splicing. However, because the hoisting machine is prone to swaying during the alignment process, it is not conducive to the rapid connection of the panels, resulting in low splicing efficiency. Utility Model Content

[0004] To address the aforementioned problems, this disclosure provides a plate lifting device.

[0005] According to a first aspect of this disclosure, a sheet metal lifting device is provided, the sheet metal lifting device comprising:

[0006] Base;

[0007] A retainer that surrounds the base and is mounted on the base in a liftable manner;

[0008] The mounting component is fixedly connected to the retainer and has a plurality of mounting holes arranged at intervals along the vertical direction, the mounting holes being configured to fix the plate by fasteners.

[0009] In one embodiment of this disclosure, the retainer includes a main body and at least one guide wheel, the guide wheel being rotatably disposed on the main body, the main body encircling the base, the guide wheel having stop flanges at opposite ends, the middle portion of the guide wheel rollingly engaging with the front or rear upright wall of the base, and two stop flanges being disposed on the left and right upright walls of the base respectively, and configured to limit the amount of displacement of the main body relative to the base to the sides.

[0010] In one embodiment of this disclosure, the cage includes two guide wheels, which are respectively disposed on the front and rear upright walls of the base.

[0011] In one embodiment of this disclosure, the guide wheel on the front upright side of the base is located below the guide wheel on the rear upright side.

[0012] In one embodiment of this disclosure, the main body includes a front upright plate, a rear upright plate, a first left side plate, and a first right side plate that are fixedly connected to each other. The front upright plate is mounted on the base in a liftable manner via a lifting transmission mechanism, and the guide wheels are rotatably mounted on the first left side plate and the first right side plate.

[0013] In one embodiment of this disclosure, the mounting member includes a fixing member fixedly connected to the retainer and an anti-sway member that surrounds the retainer and is fixedly connected to the fixing member.

[0014] In one embodiment of this disclosure, the anti-sway member is a U-shaped plate that surrounds the base and has its two ends fixedly connected to the fixing member.

[0015] In one embodiment of this disclosure, the fastener includes a second left side plate and a second right side plate disposed on the left and right sides of the base and fixedly connected to the retainer, and a fixing plate located on the front upright side of the base and fixedly connected to the second left side plate and the second right side plate, wherein the mounting hole is disposed on the fixing plate.

[0016] In one embodiment of this disclosure, the lifting transmission mechanism includes a worm gear rotatably disposed on the base and meshing with it, a lead screw extending vertically and rotatably disposed on the base, and a nut block meshing with the lead screw. The nut block is fixedly connected to the front upright plate. The drive motor of the plate lifting device is disposed on the base and configured to drive the lead screw to rotate. The worm gear is configured to be drive-connected to the drive motor.

[0017] In one embodiment of this disclosure, the base includes a base body and a lifting frame disposed on the base body, the lifting frame having a guide groove extending in a vertical direction, and the lead screw being located within the guide groove.

[0018] According to a second aspect of this disclosure, a sheet material lifting system is provided, the sheet material lifting system comprising a plurality of sheet material lifting devices arranged sequentially at intervals, the plurality of sheet material lifting devices sharing the same drive motor, the lifting transmission mechanism of the first sheet material lifting device being driven connected to the drive motor, the lifting transmission mechanism driving the retainer to lift relative to the base, and the lifting transmission mechanisms of two adjacent sheet material lifting devices being driven connected by a coupling.

[0019] One beneficial effect of this disclosure is that the plate lifting device provided includes a base, a retainer, and a mounting component, wherein the retainer surrounds the base and is mounted on the base in a liftable manner. The mounting component is fixedly connected to the retainer and has a plurality of mounting holes spaced apart in a vertical direction, the mounting holes being configured to secure the plate with fasteners.

[0020] The sheet metal lifting device disclosed herein has a simple structure. The mounting components are fixed to the sheet metal with fasteners and are simultaneously connected to a retainer, moving up and down relative to the base. During this process, because the sheet metal moves up and down relative to the base, swaying of the sheet metal is avoided, allowing for rapid assembly of the sheet metal and improving the efficiency of sheet metal splicing.

[0021] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0023] Figure 1 This is a schematic diagram of the overall structure of a plate lifting device provided in an embodiment of this disclosure;

[0024] Figure 2 yes Figure 1 Enlarged view of the local structure at point A;

[0025] Figure 3 This is a schematic diagram of the structure of the cage and mounting component provided in one embodiment of the present disclosure;

[0026] Figure 4 This is a structural schematic diagram of a cage and mounting component provided in another embodiment of this disclosure.

[0027] Figures 1 to 4 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0028] 1. Base; 11. Lifting frame; 111. Guide groove; 12. Base body; 121. Partition plate;

[0029] 2. Cage; 211. Front upright plate; 212. First right side plate; 213. Rear upright plate; 214. First left side plate; 22. Guide wheel; 221. Stop flange;

[0030] 3. Mounting components; 31. Fasteners; 311. Fixing plate; 312. Second left side plate; 313. Second right side plate; 32. Anti-sway components;

[0031] 41. Lead screw; 42. Nut block;

[0032] 5. Drive motor; 6. Coupling. Detailed Implementation

[0033] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0037] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0038] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0039] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0040] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0041] To address the problem of low splicing efficiency caused by the swaying of panels during the splicing process, which makes it difficult to align the panels and thus leads to the problem of low splicing efficiency, this disclosure provides a panel lifting device.

[0042] like Figure 1 As shown, this disclosure provides a sheet material lifting device, which includes a base 1, a retainer 2, and a mounting member 3. The retainer 2 surrounds the base 1 and is mounted on the base 1 in a liftable manner. The mounting member 3 is fixedly connected to the retainer 2 and has a plurality of mounting holes arranged at intervals along the vertical direction. The mounting holes are configured to fix the sheet material by fasteners.

[0043] Taking the assembly of large cylindrical sections as an example, the traditional assembly process is as follows: first, the bottommost section of the cylindrical section is fixed; then, a crane lifts the upper section of the cylindrical section above the bottommost section, and after positioning, the two sections are joined and secured together. During this process, as the crane lifts the section to the bottommost section, the horizontal movement of the section causes it to sway. At this point, it is necessary to wait for the section to stop swaying before it can be joined and secured, thus resulting in low efficiency.

[0044] The plate lifting device used in this disclosure first fixes the first plate segment to the mounting component 3 using fasteners. Then, the first plate segment and the mounting component 3 rise relative to the base 1 along with the retainer 2. After the first plate segment rises to a preset height, other devices, such as a hoist, are used to keep the first plate segment at the preset height, which must be greater than the height of the second plate segment. Then, the mounting component 3 separates from the first plate segment and descends with the retainer 2 to fix the second plate segment.

[0045] After the second section of the plate is secured, the retainer 2, the mounting component 3, and the second section of the plate rise relative to the base 1, connecting and securing it to the first section of the plate. Then, the mounting component 3 of the plate lifting device separates from the second section of the plate, and the hoist lifts the two fixed sections of the plate vertically upwards to a certain height.

[0046] By repeating this process, multiple sections of panels can be spliced ​​together. During the splicing process, both the panels to be spliced ​​and the panels that have been spliced ​​move vertically. The hoisted panels only change in height, not in horizontal position. Therefore, the panels will not swing significantly, which would affect the connection of the panels and waste connection time.

[0047] In practical applications, the base 1 is placed on the ground, and the mounting component 3 moves up and down relative to the base 1 along the height direction of the base 1 along with the retainer 2. The mounting component 3 is provided with multiple mounting holes, and the user can use fasteners to fix the mounting component 3 to the plate.

[0048] Specifically, in one embodiment, the fastener mentioned above is a bolt, which the user can pass through the mounting hole and the plate to fix the plate to the mounting part 3. Of course, this embodiment is applicable to situations where the plate allows for holes to be made for bolt insertion for fixing.

[0049] In another embodiment, the fastener can be an auxiliary clamping device, which is fixed to the mounting part 3 through a mounting hole. At the same time, the auxiliary clamping device clamps the plate without the need to open a hole in the plate, thereby completing the mutual fixation between the mounting part 3 and the plate.

[0050] In addition, the lifting and lowering movement of the mounting component 3 and the retainer 2 relative to the base 1 can be achieved by a mechanical lifting transmission mechanism, or by relying on manual labor to achieve precise positioning between the plates.

[0051] In one embodiment, for some small boards, the user can fix the board to the mounting bracket 3 and manually push the retainer 2 to move the board along the height direction of the base 1, thereby achieving the connection between the boards and avoiding the problem of uneven connection when manually splicing boards.

[0052] In another embodiment, for some large or high-height panels, the retainer 2 can be raised and lowered relative to the base 1 by means of a lifting transmission mechanism.

[0053] The sheet metal lifting device disclosed herein has a simple structure and precise docking, avoiding the problems of uneven docking and low docking efficiency caused by swaying during the assembly of sheets by manual labor or other hoisting equipment.

[0054] See Figure 2 as well as Figure 4 In one embodiment of this disclosure, the retainer 2 includes a main body and at least one guide wheel 22. The guide wheel 22 is rotatably mounted on the main body. The main body surrounds the base 1. Stop flanges 221 are provided at opposite ends of the guide wheel 22. The middle part of the guide wheel 22 rolls with the front or rear wall of the base 1. The two stop flanges 221 are respectively located on the left and right sides of the base 1 and are configured to limit the amount of displacement of the main body relative to the base 1 to the sides.

[0055] In this embodiment, when the retainer 2 is raised or lowered relative to the base 1, the middle part of the guide wheel 22 rolls with the front or rear wall of the base 1 to reduce the wear of the retainer 2 during the raising or lowering motion relative to the base 1.

[0056] The stop flanges 221 at both ends of the guide wheel 22 prevent the cage 2 from shifting excessively on both sides relative to the base 1, thereby ensuring the accuracy of the mating between the plates. In addition, the cooperation between the guide wheel 22 and the side wall of the base 1 can effectively enhance the stability of the cage 2 in its movement relative to the base 1.

[0057] In one embodiment, the retainer 2 has only one guide wheel 22 on the rear upright wall of the base 1. In this embodiment, the retainer 2 located on the front upright wall of the base 1 is fixed to the lifting transmission mechanism inside the base 1, and the rear upright wall of the base 1 is provided with a guide wheel 22. At this time, the lifting transmission mechanism inside the base 1 drives the retainer 2 to move up and down, and the retainer 2 contacts the base 1 through the guide wheel 22 on the rear upright wall of the base 1.

[0058] See Figure 1In one embodiment of this disclosure, the retainer 2 includes two guide wheels 22, which are respectively disposed on the front and rear upright walls of the base 1. In this embodiment, the two guide wheels 22 jointly position the retainer 2 relative to the base 1, thereby improving the rigidity of the retainer 2 and its stability during lifting.

[0059] More specifically, in one embodiment of this disclosure, the guide wheel 22 on the front upright side of the base 1 is located below the guide wheel 22 on the rear upright side.

[0060] Since the plate is fixedly connected to the mounting part 3, and the mounting part 3 is located at the front of the base 1, considering the weight of the plate itself, the installation position of the guide wheel 22 on the front wall side of the base 1 is set below the guide wheel 22 on the rear wall side. More specifically, the installation position of the guide wheel 22 on the front wall side of the base 1 is set below the plate, which helps the guide wheel 22 on the front wall side to share the weight of the plate and avoid the plate being too heavy, causing deformation at the connection between the retainer 2 and the lifting transmission mechanism, thus affecting the normal operation of the plate lifting device.

[0061] like Figure 3 , Figure 4 As shown, in one embodiment of this disclosure, the main body includes a front upright plate 211, a rear upright plate 213, a first left side plate 214, and a first right side plate 212 that are fixedly connected to each other. The front upright plate 211 is mounted on the base 1 in a liftable manner through a lifting transmission mechanism, and the guide wheel 22 is rotatably mounted on the first left side plate 214 and the first right side plate 212.

[0062] In this embodiment, the main body of the retainer 2 is composed of multiple panels spliced ​​together. The front upright plate 211, the rear upright plate 213, the first left side plate 214, and the first right side plate 212 together enclose the base 1 and leave gaps with the sides of the base 1 to avoid direct contact and wear between the front upright plate 211, the rear upright plate 213, the first left side plate 214, and the first right side plate 212 and the base 1 during the lifting process.

[0063] The front upright plate 211 is connected to the lifting transmission mechanism inside the base 1. The lifting transmission mechanism drives the front upright plate 211, the rear upright plate 213, the first left side plate 214, and the first right side plate 212 to rise and fall relative to the base 1. At the same time, the guide wheels 22 set on the first left side plate 214 and the first right side plate 212, together with the lifting transmission mechanism, achieve the horizontal positioning of the retainer 2 relative to the base 1, so that the retainer 2 will not shift relative to the base 1 in the front-back or left-right directions.

[0064] The cage 2 provided in this disclosure has a simple structure and reliable positioning, which facilitates precise docking of plates.

[0065] like Figure 3As shown, in one embodiment of this disclosure, the mounting member 3 includes a fastener 31 that is fixedly connected to the retainer 2.

[0066] Specifically, the lower end of the fastener 31 extends downwards at an angle to the guide wheel 22 on the front upright side of the base 1. After the plate is fixed to the mounting component 3, the weight of the plate is transferred to the guide wheel 22 on the front upright side of the base 1 through the fastener 31, and then acts on the base 1 through the guide wheel 22. This arrangement effectively distributes the weight of the plate onto the base 1, reducing the force ultimately acting on the fastener 31 and preventing deformation of the fastener 31 due to the force acting on it.

[0067] Furthermore, the fastener 31 and the retainer 2 are locked together by bolts and nuts. This arrangement allows the bolts to serve as the pivot point for the guide wheel 22 on the front upright side of the base 1. Simultaneously, even without tightening the bolts and nuts, the angle of the fastener 31 relative to the base 1 can be adjusted, thereby adjusting the forward movement of the plate relative to the base 1. Once the angle of the fastener 31 relative to the base 1 is determined, tightening the nuts locks the fastener 31 and the retainer 2 in place, thus securing them together.

[0068] However, in practical applications, the bolts and nuts are prone to loosening, causing the mounting component 3 and the retainer 2 to be unstable, which in turn causes the plate to tilt and may even lead to a safety accident. To address this, in one embodiment, the plate lifting device provided in this disclosure further includes an anti-sway component 32 that surrounds the retainer 2 and is fixedly connected to the fixing component 31.

[0069] Specifically, such as Figure 4 As shown, in one embodiment of this disclosure, the anti-sway member 32 is a U-shaped plate that surrounds the base 1 and has its two ends fixedly connected to the fixing member 31. The U-shaped anti-sway member 32 and the fixing member 31 together enclose the base 1, preventing the plate from falling off due to loosening between the fixing member 31 and the retainer 2.

[0070] In addition, there is a gap between the anti-sway component 32 on the rear wall side of the base 1 and the retainer 2. When the fastener 31 and the retainer 2 become loose, the anti-sway component 32 on the rear wall side of the base 1 will fit against the retainer 2 to prevent the plate on the mounting component 3 from tilting excessively or even falling off.

[0071] Under normal circumstances, the gap between the anti-sway component 32 on the rear wall side of the base 1 and the retainer 2 allows the fixing component 31 to adjust the angle relative to the base 1, thereby adjusting the forward movement of the plate relative to the base 1.

[0072] In one embodiment of this disclosure, the fastener 31 includes a second left side plate 312 and a second right side plate 313 disposed on the left and right sides of the base 1 and fixedly connected to the retainer 2, and a fixing plate 311 located on the front upright side of the base 1 and fixedly connected to the second left side plate 312 and the second right side plate 313, with mounting holes disposed on the fixing plate 311.

[0073] Specifically, the second left side plate 312 and the second right side plate 313 are fixedly connected to the first left side plate 214 and the first right side plate 212 of the retainer 2, respectively, to support the fixing plate 311 which is fixedly connected to the second left side plate 312 and the second right side plate 313.

[0074] The plates installed on the fixed plate 311 can distribute the weight from the second left side plate 312 and the second right side plate 313 to the base 1, making the structure of the mounting component 3 more stable.

[0075] In one embodiment of this disclosure, the lifting transmission mechanism includes a worm gear rotatably mounted on a base 1 and meshing with it, a lead screw 41 extending vertically and rotatably mounted on the base, and a nut block 42 meshing with the lead screw 41. The nut block 42 is fixedly connected to the front upright plate 211. The drive motor 5 of the plate lifting device is mounted on the base 1 and configured to drive the lead screw 41 to rotate. The worm gear is configured to be connected to the drive motor 5 in a transmission manner.

[0076] Specifically, the drive motor 5 is located outside the base 1 and drives the worm to rotate through the coupling 6. The worm extends into the base 1 and meshes with the worm wheel inside the base 1. The lead screw 41 inside the base 1 is coaxially arranged with the worm wheel and fixed to each other. The worm drives the worm wheel and drives the lead screw 41 to rotate. The lead screw 41 cooperates with the nut block 42 fixed to the front upright plate 211 of the retainer 2, driving the nut block 42, retainer 2, mounting part 3 and plate as a whole to rise and fall relative to the base 1.

[0077] like Figure 1 As shown, in practical applications, in order to facilitate the movement of the worm gear screw 41 inside the base 1 in conjunction with the drive motor 5, a partition 121 needs to be set inside the base 1 to raise the installation position of the worm gear screw 41 so that it reaches the preset working position, and then engages with the worm connected to the drive motor 5 for transmission.

[0078] More specifically, to ensure the relative position of the lead screw 41 and the base 1, bearing seats are also required at both ends of the lead screw 41 to ensure the relative position of the lead screw 41 with respect to the base 1 and to prevent wear caused by contact between the end of the lead screw 41 and the surface of the base 1. The bearing seats are preferably angular contact ball bearings or tapered roller bearings.

[0079] In one embodiment of this disclosure, the base 1 includes a base body 12 and a lifting frame 11 disposed on the base body 12. The lifting frame 11 has a guide groove 111 extending in a vertical direction, and the lead screw 41 is located in the guide groove 111.

[0080] By providing a guide groove 111 inside the lifting frame 11 for placing the lead screw 41, and in conjunction with the above analysis, bearing seats can be provided at the top of the guide groove 111 and on the base body 12 to fix the position of the lead screw 41 relative to the base 1. At the same time, the lifting frame 11 can serve as a bearing unit for the retainer 2 and the mounting component 3. Moreover, since the guide wheel 22 inside the retainer 2 is fastened to the front and rear sides of the lifting frame 11 in actual application, the lifting frame 11 can provide a guiding function for the lifting of the retainer 2.

[0081] According to a second aspect of this disclosure, a sheet material lifting system is provided, comprising a plurality of sheet material lifting devices arranged sequentially at intervals, wherein the plurality of sheet material lifting devices share the same drive motor 5, the lifting transmission mechanism of the first sheet material lifting device is connected to the drive motor 5, the lifting transmission mechanism drives the retainer 2 to rise and fall relative to the base 1, and the lifting transmission mechanisms of two adjacent sheet material lifting devices are connected by a coupling 6.

[0082] Specifically, such as Figure 1 As shown, in the plate lifting system, the worm gear of each plate lifting device extends from both sides of the base 1 and is connected to the worm gear of the next plate lifting device via the coupling 6, or is connected to the drive motor 5.

[0083] In this sheet metal lifting system, multiple sheet metal lifting devices driven by drive motor 5 achieve synchronous lifting and lowering of the sheet metal, which is suitable for the installation of large and extra-large sheet metal parts.

[0084] To better understand the plate lifting device of this application, the plate lifting device of this disclosure will be described in conjunction with an application scenario.

[0085] Application scenarios:

[0086] During the assembly of large tanks, in order to ensure the synchronous lifting and lowering of the segmented tanks, users can use multiple plate lifting devices, which are evenly set around the periphery of the segmented tanks, with multiple plate lifting devices connected in series.

[0087] Specifically, the worm gears in two adjacent plate lifting devices are connected by a coupling 6, and the plate lifting device at the starting end is driven by a drive motor 5, thereby enabling the cages 2 and mounting parts 3 of multiple plate lifting devices to lift and lower synchronously.

[0088] After the user secures the segmented tank to the mounting brackets 3 of the multiple plate lifting devices, they start the drive motor 5. The multiple plate lifting devices work together to raise the segmented tank to the preset height. Then, using other devices, such as a hoist, the segmented tank is held at the preset height, and the user disconnects the mounting brackets 3 of the multiple plate lifting devices from the segmented tank.

[0089] The retaining frames 2 and mounting parts 3 of multiple plate lifting devices descend synchronously, while the segmented tank remains at the preset height position due to the hoisting machine. Subsequently, the user connects the second segmented tank to the mounting parts 3 of the multiple plate lifting devices and raises it to connect and fix it with the previous segmented tank.

[0090] After the fixing is completed, the user cancels the connection between the installation parts 3 of the multiple plate lifting devices and the second tank section. The hoist lifts these two tank sections to a certain height, and the user continues to operate the splicing of the subsequent tank sections until the splicing and fixing of the entire tank is completed.

[0091] During this process, the multiple tank sections do not sway during assembly, saving time waiting for the tank to stop shaking and improving assembly efficiency. Simultaneously, the plate lifting device allows for precise control of the lifting height, overcoming the limitations of traditional hoisting machines in making small-range adjustments in the vertical direction.

[0092] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A plate lifting device, characterized in that, The plate lifting device includes: Base (1); A retainer (2) surrounds the base (1) and is mounted on the base (1) in a liftable manner; Mounting component (3), which is fixedly connected to the retainer (2) and has a plurality of mounting holes arranged at intervals along the vertical direction, wherein the mounting holes are configured to fix the plate by fasteners.

2. The plate lifting device according to claim 1, characterized in that, The retainer (2) includes a main body and at least one guide wheel (22). The guide wheel (22) is rotatably mounted on the main body. The main body surrounds the base (1). The guide wheel (22) has stop flanges (221) at its opposite ends. The middle part of the guide wheel (22) rolls with the front or rear wall of the base (1). The two stop flanges (221) are respectively located on the left and right sides of the base (1) and are configured to limit the displacement of the main body relative to the base (1) to both sides.

3. The plate lifting device according to claim 2, characterized in that, The retainer (2) includes two guide wheels (22), which are respectively disposed on the front wall and the rear wall of the base (1).

4. The plate lifting device according to claim 3, characterized in that, The guide wheel (22) on the front wall side of the base (1) is located below the guide wheel (22) on the rear wall side.

5. The plate lifting device according to claim 2, characterized in that, The main body includes a front upright plate (211), a rear upright plate (213), a first left side plate (214), and a first right side plate (212) that are fixedly connected to each other. The front upright plate (211) is mounted on the base (1) in a liftable manner through a lifting transmission mechanism. The guide wheel (22) is mounted on the first left side plate (214) and the first right side plate (212) in a rotatable manner.

6. The plate lifting device according to any one of claims 1 to 5, characterized in that, The mounting component (3) includes a fixing component (31) fixedly connected to the retainer (2) and an anti-sway component (32) that surrounds the retainer (2) and is fixedly connected to the fixing component (31).

7. The plate lifting device according to claim 6, characterized in that, The anti-sway component (32) is a U-shaped plate that surrounds the base (1) and has its two ends fixedly connected to the fixing component (31).

8. The plate lifting device according to claim 6, characterized in that, The fastener (31) includes a second left side plate (312) and a second right side plate (313) disposed on the left and right sides of the base (1) and fixedly connected to the retainer (2), and a fixing plate (311) located on the front wall side of the base (1) and fixedly connected to the second left side plate (312) and the second right side plate (313), and the mounting hole is disposed on the fixing plate (311).

9. The plate lifting device according to claim 5, characterized in that, The lifting transmission mechanism includes a worm gear rotatably mounted on the base (1) and meshing with each other, a lead screw (41) extending vertically and rotatably mounted on the base, and a nut block (42) meshing with the lead screw (41). The nut block (42) is fixedly connected to the front upright plate (211). The drive motor (5) of the plate lifting device is mounted on the base (1) and configured to drive the lead screw (41) to rotate. The worm gear is configured to be connected to the drive motor (5) in a transmission manner.

10. The plate lifting device according to claim 9, characterized in that, The base (1) includes a base body (12) and a lifting frame (11) disposed on the base body (12). The lifting frame (11) has a guide groove (111) extending in the vertical direction, and the lead screw (41) is located in the guide groove (111).

11. A sheet metal lifting system, characterized in that, The plate lifting system includes a plurality of plate lifting devices as described in any one of claims 1 to 10 arranged in sequence at intervals. The plurality of plate lifting devices share the same drive motor (5). The lifting transmission mechanism of the first plate lifting device is connected to the drive motor (5). The lifting transmission mechanism drives the retainer (2) to rise and fall relative to the base (1). The lifting transmission mechanisms of two adjacent plate lifting devices are connected by a coupling (6).

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