Barrel cover stacking, taking and placing device

Abstract

The utility model relates to a barrel cover stacking, taking and placing device which comprises a bottom frame and a support located above the bottom frame, and the bottom of the support and the bottom frame are fixed together through bolts. The four corners of the bottom frame are connected to the two oppositely-arranged bottom plates through bolts, a plurality of fixing screws are arranged on the two bottom plates at equal intervals, and the bottom frame and a workbench below the bottom frame are connected and fixed through the fixing screws. A chain transmission mechanism is arranged in the support, and a power device is arranged outside the support and is in transmission connection with the chain transmission mechanism. A containing space for containing barrel covers is formed in the support, and a plurality of barrel cover supporting assemblies which are arranged up and down at equal intervals are arranged on a chain in a chain transmission mechanism located in the containing space of the support. The barrel covers arranged on the barrel cover supporting assembly are taken or stacked through ascending or descending of a chain in the chain transmission mechanism, and batch storage of the barrel covers is achieved. And the difficulty that the barrel cover cannot be stacked due to small overall height is overcome.

Description

Technical Field

[0001] This utility model relates to the field of warehousing equipment technology, specifically to a bucket lid stacking and retrieval device, used to solve situations where bucket lids cannot be stacked or where multiple regular items require storage and retrieval. Background Technology

[0002] In the fields of nuclear waste treatment and chemical pollutant production and processing, it is common practice to use steel drums to store waste and attach lids with sealing rings to achieve airtight storage. A common method is to stack the lids of individual steel drums. However, this method has several limitations. If the protrusion of the lid's gripping part is too low, the bolts will lift the lid, making stacking impossible. This hinders the stacking of lids and fails to meet the requirements for batch storage and retrieval of lids. Utility Model Content

[0003] In view of the above-mentioned technical difficulties, the purpose of this utility model is to provide a bucket lid stacking and placing device. By setting a chain transmission mechanism inside the device and setting a bucket lid support component on the chain transmission mechanism, several bucket lids can be stacked and placed, and the chain transmission mechanism can be raised and lowered under the drive of a power device, thereby realizing the picking up and stacking of each bucket lid.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a bucket lid stacking and placing device, comprising: a bottom frame and a support above the bottom frame, the bottom of the support being fixed to the bottom frame by bolts; the four corners of the bottom frame being bolted to two opposing base plates, the two base plates being provided with a plurality of fixing screws at equal intervals, the bottom frame being connected and fixed to the workbench below by the fixing screws; the support being provided with a chain drive mechanism, the support being provided with a power device outside the support and being connected to the chain drive mechanism; the support having an internal space for holding bucket lids, the chain of the chain drive mechanism located in the support having a plurality of bucket lid support assemblies arranged at equal intervals and vertically; the plurality of bucket lids being horizontally placed on the corresponding bucket lid support assemblies to form a stack of bucket lids;

[0005] Furthermore, the bracket includes two sets of identical upright frames and a horizontal connecting beam connecting the two upright frames. The two sets of upright frames are fixed to the two sides of the bottom frame by bolts in opposite directions through the base. Both ends of the two sets of upright frames are connected by the horizontal connecting beam. The two sets of upright frames and the horizontal connecting beams at both ends of the two sets of upright frames together form the entire bracket with a bucket lid accommodating space.

[0006] Each of the aforementioned frames includes two vertical columns and multiple horizontal bars connecting the two columns;

[0007] Furthermore, the horizontal connecting beams are in the form of three bends, and the ends of each horizontal connecting beam are fixed to the outer side of the vertical frame column by bolts through connecting seats;

[0008] Furthermore, the three-bend horizontal connecting beam is connected to the vertical frame to form an arc protruding outward from the support.

[0009] Furthermore, the number of horizontal connecting beams located at the same end of the two uprights is set to two, and they are set vertically on the outer side of the upright columns of the uprights;

[0010] Furthermore, the bending curvature of the horizontal connecting beam located at the upper part of the outer side of the frame column is greater than that of the horizontal connecting beam located at the lower part of the outer side of the frame column, and the bending curvature of the horizontal connecting beam located at the lower part of the outer side of the frame column is closer to the outer circumference curvature of the bucket lid.

[0011] Furthermore, the two horizontal connecting beams at each end of the two uprights are distributed in the upper middle area of ​​the outer side of the upright column.

[0012] Furthermore, the chain drive mechanism includes two independent transmission units, each of which is respectively installed on each frame; the two independent transmission units are driven by two worm gear reducers and a coupling between the two worm gear reducers, and in conjunction with a power device; the power device is a motor, which drives the two worm gear reducers to provide power to the two transmission units.

[0013] Among the two sets of transmission units, the end where the transmission unit connected to the motor is located is the driving end transmission unit, and the end where the other set of transmission units is located is the driven end transmission unit.

[0014] Furthermore, the drive-end transmission unit includes: a drive sprocket shaft, a driven sprocket shaft, two drive sprockets, two driven sprockets, and two chains; both ends of the drive sprocket shaft are led out from the worm gear reducer and two drive sprockets are provided at both ends, and the two chains are respectively wound around the two drive sprockets; the drive sprocket shaft is located near the lower part of the frame and the two ends of the drive sprocket shaft are rotatably connected to the inner surfaces of the two columns of the frame through bearings;

[0015] Two driven sprockets are respectively mounted on the two ends of the driven sprocket shaft via bearings; the two ends of the driven sprocket shaft are fixed on the right-angle brackets on both sides of the top of the frame, and the driven sprocket shaft is located on the horizontal bar at the top of the frame; the two chains are simultaneously wound around the two driven sprockets.

[0016] Furthermore, the driven-end transmission unit has the same structure as the driving-end transmission unit;

[0017] The aforementioned chain drive mechanism is such that the motor drives the drive sprockets of the drive end transmission unit and the driven end transmission unit through two worm gear reducers on the left and right sides, which in turn drive the driven sprockets in the two transmission units to rotate, and finally drive the chains in the two transmission units to transmit power.

[0018] The output rotation directions of the two worm gear reducers are left-handed and right-handed, respectively, so that the chain transmission direction of the driven end transmission unit is opposite to the chain transmission direction of the drive end transmission unit.

[0019] Furthermore, the positions of the bucket lid support components on the two chains of each of the two transmission units correspond to each other, with one bucket lid support component arranged every two chain pitches on each chain; the four bucket lid support components at the same horizontal height on the four chains of the two transmission units form a four-point support plane; one bucket lid is supported on a four-point support plane.

[0020] Furthermore, each transmission unit is equipped with a tensioning device on its two chains. The tensioning device includes a tensioning bracket mounted on the upright frame, a tensioning shaft passing through the tensioning bracket, and tensioning wheels rotatably mounted on both ends of the tensioning shaft via bearings. The teeth of the tensioning wheels engage with the chain to achieve tensioning of the chain.

[0021] Furthermore, the bucket lid support assembly is connected to the outer chain plate of the chain. The bucket lid support assembly includes an extension plate, a step connecting block, and connecting screws. The outer side of the outer chain plate is integrated with one side of the extension plate, and the extension plate is set perpendicular to the outer chain plate. One end of the step connecting block is a stepped platform with a stepped structure, and the other end is provided with a groove that matches the size of both ends of the extension plate. The extension plate is embedded in the groove of the step connecting block and fixed by two connecting screws. In use, the outer edge of the bucket lid rests on the stepped platform of the step connecting block of the bucket lid support assembly, thereby forming support for the bucket lid.

[0022] To further optimize this solution, an electrical control box is also installed on the lower part of one side of the support frame. The electrical control box contains an electrical control system. The electrical control system is equipped with detection switches via a control rod. The control rod passes through the horizontal connecting beam at the upper part of the support frame and extends to the rod head above the horizontal connecting beam, where two pairs of detection switches are installed respectively. The storage information of the bucket lid in the device is obtained through the feedback of the detection switch signals, that is, the presence of bucket lids in the top and bottom layers is detected, making it more intelligent.

[0023] The beneficial effects of the technical solution of this utility model are as follows:

[0024] This invention utilizes a chain drive mechanism to lift or lower bucket lids mounted on a lid support assembly, enabling batch storage of bucket lids. It can continuously store up to 10 lids, overcoming the difficulty of stacking lids due to their small overall height. The device is characterized by its ease of operation, large storage capacity, high reliability, and low overall height. It can be integrated into specialized automated equipment or is not limited to specific application scenarios. This solution is applicable to situations requiring the storage and retrieval of multiple lids, such as regular circular lids. The chain drive offers advantages in ease of use and accurate transmission. Furthermore, the device uses a detection switch controlled by an electronic control system to detect the presence of bucket lids, thus obtaining storage information for the lids on the device. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the bucket lid stacking and placing device of this utility model.

[0026] Figure 2 for Figure 1 Diagram showing the device with the lid in place.

[0027] Figure 3 for Figure 2 A front view from direction A.

[0028] Figure 4 for Figure 2 The other side of the orientation map.

[0029] Figure 5 for Figure 4 The front view from direction B.

[0030] Figure 6 for Figure 4 The front view from direction C.

[0031] Figure 7 This is a cross-sectional view of the bucket lid stacking and placing device of this utility model.

[0032] Figure 8 for Figure 2 The front view from direction D.

[0033] Figure 9 for Figure 8 Top view.

[0034] Figure 10 for Figure 1 The structure of the bucket lid support assembly and its assembly with the chain (Diagram) Figure 1 (Magnified at point E).

[0035] Figure 11 Diagram showing the contact state between the bucket lid and the bucket lid support assembly. Figure 2 (Magnified at F).

[0036] Figure 12 This is a structural diagram of the steel barrel involved in this utility model.

[0037] Figure 13 for Figure 12 Diagram of the bucket lid structure.

[0038] Figure 14 This is a schematic diagram of interference caused by stacked bucket lids.

[0039] In the diagram, 1. bottom frame, 2. bracket, 3. base plate, 4. power unit, 5. accommodating space, 6. lid support assembly, 7. lid, 8. drive sprocket, 9. driven sprocket, 10. chain, 11. tension bracket, 12. tension shaft, 13. tension wheel, 14. electrical control box, 15. control rod, 16. detection switch, 17. steel drum, 18. lid, 19. lid bolt, 20. worm gear reducer;

[0040] 21. Horizontal connecting beam; 22. Column; 23. Horizontal bar;

[0041] 221. The outer surface of the column;

[0042] 61. Extension plate; 62. Step connecting block; 63. Connecting screw; 621. Step platform;

[0043] 101. External link plate. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0045] like Figure 1-11A bucket lid stacking and handling device is shown, comprising: a bottom frame 1 and a support 2 located above the bottom frame 1. The bottom of the support 2 is fixed to the bottom frame 1 by bolts. The four corners of the bottom frame 1 are bolted to two opposing base plates 3. Several fixing screws are evenly spaced on the two base plates 3, and the bottom frame 1 is connected and fixed to the workbench below by the fixing screws. The support 2 is provided with a chain drive mechanism, and a power device 4 is provided on the outside of the support 2 and is connected to the chain drive mechanism. The support 2 forms a receiving space 5 for holding bucket lids 7. Several bucket lid support assemblies 6 are arranged vertically and evenly on the chain 10 of the chain drive mechanism located in the receiving space 5. Several bucket lids 7 are horizontally placed on the corresponding bucket lid support assemblies 6 to form a stack of bucket lids 7.

[0046] It should be noted that, according to the requirement of stacking 10 bucket lids 7, the bucket lid support assembly can be arranged on one side of the chain (located in the bracket accommodation space 5) to meet this requirement, and it is not necessary to arrange support blocks on the entire chain; and the chain is not a one-way endless transmission, but after the bottom bucket lid is lifted to a high position, when the bucket lid is removed and a new bucket lid is placed, it will automatically reverse the transmission to receive 10 bucket lids one by one; and so on.

[0047] The stacking process of the bucket lids 7 described above is achieved by the power device 4 providing power to the chain drive mechanism, causing the chain 10 in the chain drive mechanism to descend within the support accommodating space 5. Each time a bucket lid 7 is placed, the bucket lid support component 6 on the chain 10 descends by a fixed height. Conversely, the removal process of the stacked bucket lids 7 is achieved by the power device 4 providing reverse power to the chain drive mechanism, causing the chain 10 in the chain drive mechanism to rise within the support accommodating space 5. Each time a bucket lid 7 is removed, the bucket lid support component 6 on the chain 10 rises by a fixed height.

[0048] The bracket 2 includes two sets of identical upright frames and a horizontal connecting beam 21 connecting the two upright frames. The two sets of upright frames are fixed to the two sides of the bottom frame 1 by bolts in opposite directions through the base. The two ends of the two sets of upright frames are connected by the horizontal connecting beam 21. The two sets of upright frames and the horizontal connecting beam 21 at both ends of the two sets of upright frames together form the entire bracket 2 with a bucket lid accommodating space.

[0049] Each of the aforementioned frames includes two vertical columns 22 and a plurality of horizontal bars 23 connecting the two columns 22;

[0050] The horizontal connecting beam 21 adopts a three-bend form, and the end of each horizontal connecting beam 21 is fixed to the outer side 221 of the vertical frame column by bolts through a connecting seat;

[0051] The three-bend horizontal connecting beam 21 is connected to the vertical frame to form an arc protruding outward from the support 2;

[0052] The number of horizontal connecting beams 21 located at the same end of the two uprights is set to two, and they are set vertically on the outer side 221 of the upright column of the upright;

[0053] The bending curvature of the horizontal connecting beam located on the upper part of the outer side 221 of the upright column is greater than that of the horizontal connecting beam located on the lower part of the outer side 221 of the upright column, and the bending curvature of the horizontal connecting beam located on the lower part of the outer side 221 of the upright column is closer to the outer circumference curvature of the bucket lid 7.

[0054] The two horizontal connecting beams 21 at each end of the two uprights are distributed in the upper middle area of ​​the outer side 221 of the upright column.

[0055] The chain drive mechanism includes two independent transmission units, each set of which is installed on each frame. The two independent transmission units are connected by two worm gear reducers 20 and a coupling between them, and are also connected to a power unit for transmission. The power unit 4 is a motor that drives the two worm gear reducers 20 to provide power to the two transmission units.

[0056] Among the two sets of transmission units, the end where the transmission unit connected to the motor is located is the driving end transmission unit, and the end where the other set of transmission units is located is the driven end transmission unit.

[0057] The drive-end transmission unit includes: a drive sprocket shaft, a driven sprocket shaft, two drive sprockets 8, two driven sprockets 9, and two chains 10; the two ends of the drive sprocket shaft are led out from the worm gear reducer 20 and are provided with two drive sprockets 8 at both ends, and the two chains 10 are respectively wound around the two drive sprockets 8; the drive sprocket shaft is located near the lower part of the frame and the two ends of the drive sprocket shaft are rotatably connected to the inner surfaces of the two columns of the frame through bearings;

[0058] A driven sprocket 9 is mounted on each end of the driven sprocket shaft via bearings; the ends of the driven sprocket shaft are fixed to right-angle brackets on both sides of the top of the frame, and the driven sprocket shaft is located on the horizontal bar 23 at the top of the frame; the two chains 10 are simultaneously wound around the two driven sprockets 9.

[0059] The driven end transmission unit has the same structure as the driving end transmission unit;

[0060] The above-mentioned chain drive mechanism is that the motor drives the drive sprocket 8 of the drive end transmission unit and the driven end transmission unit through two left and right worm gear reducers 20, which in turn drive the driven sprocket 9 of each of the two transmission units to rotate, and finally drive the chain 10 in the two transmission units to perform transmission.

[0061] The output rotation directions of the two worm gear reducers 20 are left-handed and right-handed, so that the transmission direction of the chain 10 of the driven end transmission unit is opposite to the transmission direction of the chain 10 of the drive end transmission unit.

[0062] The positions of the bucket lid support components 6 on the two chains 10 in each of the two transmission units correspond to each other, and a bucket lid support component 6 is arranged every two chain pitches on each chain 10; the four bucket lid support components 6 at the same horizontal height on the four chains 10 of the two transmission units form a four-point support plane; a bucket lid 7 is supported on a four-point support plane.

[0063] Each transmission unit is equipped with a tensioning device on its two chains 10. The tensioning device includes a tensioning bracket 11 mounted on the upright frame. A tensioning shaft 12 is mounted on the tensioning bracket 11. Tensioning wheels 13 are rotatably mounted on both ends of the tensioning shaft 12 via bearings. The teeth of the tensioning wheels 13 cooperate with the chains 10 to tension the chains 10.

[0064] The bucket lid support assembly is connected to the outer chain plate 101 of the chain 10. The bucket lid support assembly 6 includes an extension plate 61, a stepped connecting block 62, and connecting screws 63. The outer side of the outer chain plate 101 is connected to one side of the extension plate 61, and the extension plate 61 is set perpendicular to the outer chain plate 101. One end of the stepped connecting block 62 is a stepped platform 621 with a stepped structure, and the other end is provided with a groove that matches the size of both ends of the extension plate 61. The extension plate 61 is embedded in the groove of the stepped connecting block 62 and fixed by two connecting screws 63. In use, the outer edge of the bucket lid 7 rests on the stepped platform 621 of the stepped connecting block 62 of the bucket lid support assembly 6, thereby forming a support for the bucket lid 7.

[0065] In this embodiment, the bracket 2 of the above structure has a accommodating space 5 for stacking 10 bucket lids 7. The 10 bucket lids 7 need to be placed on 10 layers of bucket lid support components 6 corresponding to the four chains 10, and each layer includes four bucket lid support components 6, that is, 10 four-point support planes.

[0066] This scheme utilizes two sets of transmission units for transmission, and its principle is similar to that of a "waterwheel". Driven by the power unit 4, when the first bucket lid is placed, the chains 10 in the two sets of transmission units move downward synchronously within the support space 5, and the bucket lid support assembly 6 on the chain 10 drops one level. Then, the second bucket lid is placed on the bucket lid support assembly 6 above the first bucket lid, the chain 10 descends, and the bucket lid support assembly 6 on the chain 10 drops another level. This continues until the support space 5 is filled with 10 bucket lids 7. When it is necessary to remove a bucket lid 7 after 10 bucket lids 7 have been placed, following the opposite principle of stacking bucket lids 7, the chains 10 in the two sets of transmission units move upward synchronously within the support space 5. Each time a bucket lid 7 is removed, the bucket lid support assembly 6 rises one level to facilitate the grabbing of the next bucket lid 7. Similarly, this continues until all 10 bucket lids are removed from the support space 5.

[0067] In the above process, the stacking and retrieval of the bucket lid 7 can be achieved by the existing automatic lid-removing device. The bucket lid stacking and retrieval device of this solution can be used in conjunction with the automatic lid-removing device to achieve fully automatic operation.

[0068] To further optimize this solution, an electrical control box 14 is also installed on the lower part of one side of the support 2. The electrical control box contains an electrical control system, and a control rod is installed above the control box. The control rod 15 is equipped with detection switches 16. The control rod 15 passes through the horizontal connecting beam 21 at the upper part of the support 2 and extends out to the rod head above the horizontal connecting beam 21, where two pairs of detection switches 16 are installed respectively. The storage information of the lid 7 in the device is obtained through the signal feedback of the detection switches 16, that is, the presence of lids in the top and bottom layers is detected, making it more intelligent.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A device for stacking and retrieving bucket lids, characterized in that, include: The system comprises a bottom frame and a support bracket located above the bottom frame. The bottom bracket is bolted to the bottom frame at its bottom. The four corners of the bottom frame are bolted to two opposing base plates. Several fixing screws are evenly spaced on the two base plates, which connect and fix the bottom frame to the workbench below. The support bracket contains a chain drive mechanism, and a power unit is located outside the support bracket and is connected to the chain drive mechanism. The support bracket has an internal space for holding bucket lids. Several bucket lid support assemblies are evenly spaced and arranged vertically on the chain of the chain drive mechanism located within the support space. Several bucket lids are horizontally placed on their corresponding bucket lid support assemblies.

2. The bucket lid stacking and placing device according to claim 1, characterized in that: The bracket includes two sets of identical upright frames and a horizontal connecting beam connecting the two upright frames. The two sets of upright frames are fixed to the two sides of the bottom frame by bolts in opposite directions through the base. The two ends of the two sets of upright frames are connected by the horizontal connecting beam. The two sets of upright frames and the horizontal connecting beams at both ends of the two sets of upright frames together form the entire bracket with a bucket lid accommodating space.

3. The bucket lid stacking and placing device according to claim 2, characterized in that: Each of the aforementioned frames includes two vertical columns and multiple horizontal bars connecting the two columns.

4. A bucket lid stacking and placing device according to claim 2, characterized in that: The horizontal connecting beams are in the form of three bends, and the ends of each horizontal connecting beam are fixed to the outer side of the upright column by bolts through connecting seats.

5. A bucket lid stacking and placing device according to claim 1, characterized in that: The chain drive mechanism includes two independent transmission units, each set of which is installed on each frame. The two independent transmission units are connected by two worm gear reducers and a coupling between them, and are driven by a power unit. The power unit is a single motor, and the two worm gear reducers are driven by the same motor.

6. A bucket lid stacking and placing device according to claim 5, characterized in that: In the two sets of transmission units, the end where the transmission unit connected to the motor is located is the driving end transmission unit, and the end where the other set of transmission units is located is the driven end transmission unit.

7. A bucket lid stacking and placing device according to claim 6, characterized in that: The drive-end transmission unit includes: a drive sprocket shaft, a driven sprocket shaft, two drive sprockets, two driven sprockets, and two chains; both ends of the drive sprocket shaft are led out from the worm gear reducer and two drive sprockets are provided at both ends, and the two chains are respectively wound around the two drive sprockets; the drive sprocket shaft is located near the lower part of the frame and the two ends of the drive sprocket shaft are rotatably connected to the inner surfaces of the two columns of the frame through bearings; Two driven sprockets are respectively mounted on the two ends of the driven sprocket shaft via bearings; the two ends of the driven sprocket shaft are fixed on the right-angle brackets on both sides of the top of the frame, and the driven sprocket shaft is located on the horizontal bar at the top of the frame; the two chains are simultaneously wound around the two driven sprockets.

8. A bucket lid stacking and placing device according to claim 6, characterized in that: The driven end transmission unit has the same structure as the driving end transmission unit, but the chain drive direction of the driven end transmission unit is opposite to that of the driving end transmission unit.

9. A bucket lid stacking and placing device according to claim 6, characterized in that: The positions of the bucket lid support components on the two chains of each of the two transmission units correspond to each other, and one bucket lid support component is arranged on each chain every two chain pitches; the four bucket lid support components at the same horizontal height on the four chains of the two transmission units form a four-point support plane; one bucket lid is supported on a four-point support plane.

10. A bucket lid stacking and placing device according to claim 9, characterized in that: The bucket lid support assembly is connected to the outer chain plate of the chain. The bucket lid support assembly includes an extension plate, a stepped connecting block, and connecting screws. The outer side of the outer chain plate is integrated with one side of the extension plate, and the extension plate is set perpendicular to the outer chain plate. One end of the stepped connecting block is a stepped platform, and the other end is provided with a groove that matches the size of both ends of the extension plate. The extension plate is embedded in the groove of the stepped connecting block and fixed by two connecting screws. In use, the outer edge of the bucket lid rests on the stepped platform of the stepped connecting block of the bucket lid support assembly, thereby providing support for the bucket lid.

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