Trailer type elevator and packaging production line comprising elevator

Abstract

The utility model relates to a trailer type elevator and a packaging production line comprising the same, the elevator comprises a plurality of storage hoppers, a turntable single driving device, and a lifting track, a turning track and a rotating track which are supported on two sides of the storage hoppers, the tracks form closed tracks, flexible chain plates are arranged in the closed tracks, and the flexible chain plates are connected with the turntable single driving device. The turntable single driving device is in driving connection with the flexible chain plate; towing hooks are arranged on the flexible chain plate at intervals. Rolling bodies are arranged on the two sides of the storage hopper, and the two sides of the storage hopper are dragged and hung on the towing hooks through the inner sides of the rolling bodies; the two sides of the storage hopper slide above the lifting rails through the outer sides of the rolling bodies; guide edges are arranged on the outer edges of the turning track and the rotary track, guide rails are formed between the outer edges of the turning track and the rotary track and the guide edges, the two sides of the storage hopper are slidably limited in the guide rails through the outer sides of the rolling bodies, and a steering wheel used for assisting steering of the storage hopper is arranged in the middle of the turning track. The device is simple in structure, reduces the maintenance cost, is stable in operation, achieves the synchronous control, and greatly reduces the overload risk of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of combined packaging, in particular to a bucket elevator and a packaging production line comprising the elevator. Background Art

[0002] In the packaging line for materials such as granules, flakes, capsules, and toy blocks, the storage hopper is located on the circulation line. Driven by the conveyor chain, it passes through the unloading ports of multiple unloading machines. Multiple unloading machines collect various materials in the storage hopper. After the storage hopper collects the materials, it is lifted to the packaging machine by the elevator. The storage hopper pours the materials into the packaging machine for packaging along the turning track. After emptying the materials, the storage hopper returns to its original position along the rotating track for cyclic collection and packaging.

[0003] For example, the patent document with patent application number 2021219351240 discloses an embracing elevator and production line, in which the embracing elevator includes a lifting track, a horizontal track, and a rotating track. Chain plate conveyors are provided on both sides of the lifting track, the horizontal track, and the rotating track. The chain plate conveyors are provided with holding claws. The chain plate conveyors rotate along the track driven by the motor. At this time, the holding claws on both sides rotate accordingly to clamp and lift the storage hopper, clamp and turn, and clamp and rotate, thereby completing the unloading and packaging and returning to the initial position. However, this clamping method requires a large amount of working power, which easily causes motor load; and the structure uses two independent motors to drive the chain plate conveyors on both sides respectively. The separate driving makes it impossible to ensure the synchronous control of the holding claws on both sides to clamp the storage hopper, which will affect the normal operation of the elevator; in addition, the elevators on the market generally use metal chains for conveying. During the conveying process, there is large friction with the conveying track, which is easy to wear, and will generate certain noise and vibration. The operating stability is poor and frequent maintenance is required, which has high maintenance costs. Utility Model Content

[0004] In response to the existing problems, the utility model proposes a bucket elevator and a packaging production line including the elevator, which has a simple structure, reduces production costs and maintenance costs, operates stably, realizes synchronous control, and greatly reduces the risk of motor overload.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A bucket elevator comprises a plurality of storage hoppers, a single turntable drive device, and a lifting track, a turning track, and a rotating track supported on both sides of the storage hoppers. The lifting track, the turning track, and the rotating track form a closed track. Flexible chain plates are provided in the closed tracks on both sides. The single turntable drive device is driven and connected to the flexible chain plates on both sides.

[0007] Towing hooks are arranged at intervals on the flexible chain plates; rolling bodies are provided on both sides of the storage hopper, and both sides of the storage hopper are towed on the towing hooks through the inner sides of the rolling bodies;

[0008] The two sides of the storage hopper slide above the lifting track through the outer side of the rolling body; the outer edges of the turning track and the revolving track are provided with guide edges, and guide rails are formed between the outer edges of the turning track and the revolving track and the guide edges. On the turning track and the revolving track, the two sides of the storage hopper are limited in the guide rails by sliding the outer sides of the rolling body, and a steering wheel for assisting the storage hopper in steering is provided in the middle of the turning track.

[0009] Preferably, the rolling element comprises an inner roller bearing, an outer roller bearing and a fixed shaft, the inner rings of the inner roller bearing and the outer roller bearing are fixed on the fixed shaft, and the fixed shaft is provided with a spacer between the inner roller bearing and the outer roller bearing.

[0010] Preferably, the depth of the hanging groove of the towing hook matches the outer diameter of the inner roller bearing, and a limiting arm for preventing the inner roller bearing from sliding is extended from one side of the towing hook.

[0011] Preferably, the turntable single drive device includes a single drive mechanism, a drive shaft, and an active turntable and a driven turntable located on both sides. The single drive mechanism is connected to the drive shaft, and the drive shaft passes through and fixes the active turntables on both sides, and the active turntables on both sides are respectively located on both sides of the starting end of the lifting track; the driven turntables on both sides are respectively located on both sides of the turning track; the flexible chain plate is wound around the active turntable and the driven turntable along the closed track.

[0012] Preferably, the steering wheel is coaxially connected to the driven rotating discs on both sides.

[0013] Preferably, a downward bending limit plate is provided at the end of the turning track, and the downward bending limit plate is extended to the lower end of the steering wheel.

[0014] Preferably, the trailer bucket elevator further comprises a frame, the lifting track, the turning track and the rotary track are fixed on the frame, and gantries are provided on the lifting tracks on both sides.

[0015] On the other hand, the utility model also discloses a packaging production line, including a circulation line body, a material unloading machine, a packaging machine and the trailer bucket elevator as described above, the trailer bucket elevator is located on one side of the circulation line body; the circulation line body is close to the starting end of the lifting track as the bucket outlet end, and close to the end of the rotating track as the bucket inlet end, the starting end of the lifting track is connected to the bucket outlet end, and the end of the rotating track is connected to the bucket inlet end, forming a circulation loop; the material unloading machine is located in the circulation loop, and the storage hopper circulates and rotates on the circulation loop; a material unloading hopper is provided under the turning track, and the bucket mouth of the material unloading hopper is connected to the packaging machine.

[0016] Preferably, the end of the guide edge ends before the feed end of the endless line body.

[0017] Preferably, the circulating line body is provided with a bucket outlet baffle at the bucket outlet end and a bucket inlet arc plate at the bucket inlet end.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] When the hopper is lifted up and into the turning track, the bottom of the hopper will complete the unloading action along the steering wheel, and then the hopper will slide along the guide rail and finally return to the circulating line body. The cooperation between the rolling body and the towing hook on the flexible chain plate, and the cooperation with the lifting track and the guide rail can greatly reduce the friction resistance in the transportation process of the hopper, thereby greatly reducing the risk of load of the single drive mechanism. The use of flexible chain plates can reduce noise and vibration, improve operation stability and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 This is a front overall schematic diagram of the utility model trailer bucket elevator;

[0022] Figure 2 This is a schematic diagram of the back of the utility model trailer bucket elevator;

[0023] Figure 3 for Figure 1 A magnified schematic diagram of point A in the middle;

[0024] Figure 4 for Figure 1 A magnified schematic diagram of point B in the middle;

[0025] Figure 5 for Figure 2 The enlarged schematic diagram of point D in the middle;

[0026] Figure 6 This is a schematic diagram of the storage hopper in the utility model;

[0027] Figure 7 It is a schematic diagram of the towing hook in the utility model;

[0028] Figure 8 for Figure 1 The enlarged schematic diagram of point C in the middle;

[0029] Figure 9 This is an overall schematic diagram of the packaging production line of the utility model;

[0030] Figure 10 for Figure 9 The enlarged schematic diagram of point E in the middle;

[0031] Figure 11 for Figure 9 Enlarged schematic diagram of point F in the middle.

[0032] Figure ID:

[0033] 1. Storage hopper; 11. Rolling element; 12. Inner roller bearing; 13. Outer roller bearing; 14. Fixed shaft; 15. Spacer; 2. Turntable single drive device; 21. Single drive mechanism; 22. Drive shaft; 23. Active turntable; 24. Driven turntable; 3. Lifting track; 4. Turning track; 41. Steering wheel; 42. Lower bend limit plate; 5. Rotating track; 6. Flexible chain plate; 61. Drag hook; 62. Limit arm; 7. Guide edge; 8. Guide rail; 9. Frame; 91. Gantry; 10. Circulation line; 101. Bucket outlet; 102. Bucket inlet; 103. Bucket outlet baffle; 104. Bucket inlet arc plate; 20. Packaging machine; 30. Lower hopper. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1 to 8 The utility model shows a bucket elevator provided by the present invention, comprising a plurality of storage hoppers 1, a single turntable drive device 2, and a lifting track 3, a turning track 4, and a rotary track 5 supported on both sides of the storage hoppers 1. The lifting track 3, the turning track 4, and the rotary track 5 form a closed track. The storage hoppers 1 of the circulating line body 10 enter the closed track through the starting end of the lifting track 3 and leave the closed track through the end of the rotary track 5.

[0038] Flexible chain plates 6 are provided in the closed tracks on both sides. The turntable single drive device 2 is driven and connected with the flexible chain plates 6 on both sides. The turntable single drive device 2 can drive the flexible chain plates 6 on both sides to rotate in the closed tracks on both sides. Specifically, the turntable single drive device 2 includes a single drive mechanism 21, a drive shaft 22 and an active turntable 23 and a driven turntable 24 located on both sides. The single drive mechanism 21 is driven and connected with the drive shaft 22. The drive shaft 22 passes through and fixes the active turntables 23 on both sides. The active turntables 23 on both sides are respectively located on both sides of the starting end of the lifting track 3, so the start The single drive mechanism 21 is driven, and the drive shaft 22 drives the active turntables 23 on both sides to rotate around the axis under the drive of the single drive mechanism 21; the driven turntables 24 on both sides are respectively located on both sides of the turning track 4, and the flexible chain plates 6 on both sides are wound around the active turntable 23 and the driven turntable 24 on both sides along the closed track. Therefore, the rotation of the active turntables 23 on both sides can drive the flexible chain plates 6 and the driven turntable 24 on both sides to rotate, realizing the single drive synchronous control of the transmission of the flexible chain plates 6 on both sides, thereby ensuring the synchronous control of the storage hopper 1 to perform lifting, turning and rotation;

[0039] The flexible chain plate 6 is provided with towing hooks 61 at intervals, and rolling bodies 11 are provided on both sides of the storage hopper 1. Figure 3 As shown, both sides of the storage hopper 1 are towed on the towing hooks 61 on both sides through the inner sides of the rolling elements 11. When the flexible chain plate 6 rotates, the towing hooks 61 will rotate along the closed track with the flexible chain plate 6. Specifically, the towing hooks 61 are U-shaped groove plates. When the storage hopper 1 enters the elevator, the towing hooks 61 on the flexible chain plates 6 on both sides will bear the inner sides of the rolling elements 11 on both sides, and rely on the front arms of the U-shaped groove plates to drag the storage hopper 1 upward, turn, and rotate downward.

[0040] like Figure 1 and Figure 3As shown, during the lifting process, both sides of the storage hopper 1 slide on the lifting track 3 through the outer side of the rolling body 11; and on the turning track 4 and the rotary track 5, as shown in FIG. Figure 2 and Figure 4 As shown, due to its own weight, the storage hopper 1 will fall, so a guide edge 7 is provided on the outer edge of the turning track 4 and the rotating track 5, and a guide rail 8 is formed between the outer edge of the turning track 4 and the rotating track 5 and the guide edge 7. The storage hopper 1 overcomes the weight and is limited in the guide rail 8 by sliding on the outer sides of the rolling bodies 11 on both sides; on the turning track 4, the storage hopper 1 needs to complete the unloading action, but due to its own weight, the opening of the storage hopper 1 will automatically face upwards and cannot unload the material, so as shown in FIG. Figure 4 As shown, a steering wheel 41 is coaxially provided in the middle of the driven turntable 24 on both sides to assist the storage hopper 1 in steering. When the storage hopper 1 is lifted and enters the turning track 4, the bottom of the storage hopper 1 rotates along the steering wheel 41, so that the opening of the storage hopper 1 slowly faces downward to complete the material discharge work;

[0041] During the process of conveying the storage hopper 1, the inner side of the rolling body 11 is coordinated with the towing hook 61, the outer side of the rolling body 11 is coordinated with the lifting track 3 and the guide rail 8, and the steering wheel 41 assists the storage hopper 1 in steering, so that the storage hopper 1 can be lifted, unloaded, and rotated back to the circulation line 10. This towing bucket lifting method has a simple structure and low production cost; secondly, the rolling cooperation between the inner side of the rolling body 11 and the towing hook 61, and the sliding cooperation between the outer side of the rolling body 11 and the lifting track 3 and the guide rail 8 can greatly reduce the friction resistance in the conveying process, thereby greatly reducing the risk of load on the single drive mechanism 21; in addition, the flexible chain plate is generally made of high-strength and wear-resistant materials. Therefore, the use of a flexible chain plate 6 can greatly reduce the friction between the chain plate and the track, reduce noise and vibration, improve operational stability, and can reduce the number of maintenance times, reduce maintenance costs, and increase service life.

[0042] Preferably, if Figure 6 As shown, the rolling body 11 adopts a bearing structure, which includes an inner roller bearing 12, an outer roller bearing 13 and a fixed shaft 14. The inner rings of the inner roller bearing 12 and the outer roller bearing 13 are fixed on the fixed shaft 14 to play a supporting role. The outer ring of the inner roller bearing 12 rolls and is dragged on the towing hook 61, and the outer ring of the outer roller bearing 13 slides on the lifting track 3 and the guide rail 8, which not only ensures stable transmission but also more effectively reduces the friction resistance during transmission, thereby improving the operating stability of the elevator and reducing the risk of overload of the single drive mechanism 21; further, the fixed shaft 14 is provided with a spacer 15 between the inner roller bearing 12 and the outer roller bearing 13. The setting of the spacer 15 can prevent the inner roller bearing 12 and the outer roller bearing 13 from being misaligned and affecting the transmission of the storage hopper 1.

[0043] In other embodiments, the rolling body 11 may be a double roller structure, which includes an inner roller, an outer roller and a connecting shaft. The inner roller and the outer roller are rollingly arranged on the inner and outer sides of the connecting shaft, and the connecting shaft is also provided with a spacer pad 15; the rolling body 11 may be a roller, and the roller is rollingly arranged on the connecting shaft on both sides of the storage hopper 1.

[0044] Furthermore, if Figure 3 As shown, the depth of the hook groove of the tow hook 61 matches the outer diameter of the inner roller bearing 12, which can prevent the inner roller bearing 12 from escaping from the hook groove of the tow hook 61 during the transportation of the storage hopper 1 and causing the storage hopper 1 to derail; in addition, as shown Figure 7 As shown, a limit arm 62 is extended from one side of the towing hook 61. During the lifting process of the storage hopper 1, the towing hook 61 is tilted. The setting of the limit arm 62 can prevent the inner roller bearing 12 from sliding off the towing hook 61, thereby playing a role in stabilizing the pushing. During the turning and rotating process, the setting of the limit arm 62 also makes it possible to push the storage hopper forward more stably.

[0045] Furthermore, if Figure 4 As shown, a downwardly curved limit plate 42 is provided at the end of the turning track 4, and the downwardly curved limit plate 42 is extended to the lower end of the steering wheel 41. When the storage hopper 1 rotates along the chain plate to the lower end of the steering wheel 41 and then disengages from the steering wheel 41, the storage hopper 1 is automatically converted to an opening facing upward due to its own weight. However, due to static electricity, the material in the storage hopper 1 may not be completely poured into the packaging machine 20. Therefore, the provision of the downwardly curved limit plate 42 can extend the unloading time of the storage hopper 1 and ensure that all the materials are poured into the packaging machine 20.

[0046] Furthermore, the trailer bucket elevator also includes a frame 9, the lifting track 3, the turning track 4 and the rotary track 5 are fixed on the frame 9, and a gantry 91 is provided on the lifting tracks 3 on both sides, so that the overall structure of the trailer bucket elevator is more stable.

[0047] To sum up, the utility model realizes the single-drive synchronous control of the transmission of the flexible chain plates 6 on both sides, thereby ensuring the synchronous control of the lifting, turning and rotation of the storage hopper 1; and in the process of conveying the storage hopper 1, through the towing cooperation of the inner side of the rolling body 11 and the towing hook 61, through the sliding cooperation of the outer side of the rolling body 11 and the lifting track 3 and the guide rail 8, and the steering wheel 41 assists the storage hopper 1 in steering, the storage hopper 1 can be lifted, unloaded, and rotated back to the circulation line body 10. This towing bucket lifting method has a simple structure and low production cost; secondly, the rolling cooperation of the inner side of the rolling body 11 and the towing hook 61, and the sliding cooperation of the outer side of the rolling body 11 and the lifting track 3 and the guide rail 8 can greatly reduce the friction resistance during the transmission process, thereby greatly reducing the risk of load of the single drive mechanism 21; in addition, the use of the flexible chain plate 6 can greatly reduce the friction between the chain plate and the track, reduce noise and vibration, improve operation stability, and can reduce the number of maintenance times, reduce maintenance costs, and increase service life.

[0048] The utility model also provides a packaging production line, such as Figure 9 As shown, it includes a circulating line body 10, a feeding unit, a packaging machine 20 and the above-mentioned bucket elevator. The feeding unit is located on the inner or outer side of the circulating line body 10, and the storage hopper 1 is conveyed on the chain plate of the circulating line body 10. The feeding port of the feeding unit is aligned with the storage hopper 1 of the circulating line body 10; the bucket elevator is located on one side of the circulating line body 10; the starting end of the circulating line body 10 close to the lifting track 3 is the bucket discharge end 101, and the end close to the rotary track 5 is the bucket feed end 102. The starting end of the lifting track 3 is connected to the bucket discharge end 101, and the end of the rotary track 5 is connected to the bucket feed end 102 to form a circulating loop; a feeding hopper 30 is provided below the turning track 4, and the bucket mouth of the feeding hopper 30 is connected to the packaging machine 20;

[0049] During operation, the chain plate of the circulation line body 10 drives the storage hopper 1 to rotate, and the storage hopper 1 passes through the unloading unit one by one to receive the material of the unloading unit, and enters the drag bucket elevator at the bucket outlet end 101 of the circulation line body 10; the towing hooks 61 on the flexible chain plates 6 on both sides receive the inner roller bearings 12 on both sides of the storage hopper 1, and drag the storage hopper 1 to lift, turn and rotate downward along the lifting track 3. On the turning track 4, the material in the storage hopper 1 is poured into the packaging machine 20 along the unloading hopper 30 along the guide rail 8 and the steering wheel 41 for packaging. The storage hopper 1 then slides along the guide rail 8 on the rotary track 5, and finally returns to the circulation line body 10 at the bucket inlet end 102 of the circulation line body 10 to continue receiving materials, thereby realizing the circular aggregation and dumping packaging.

[0050] Furthermore, if Figure 9 and Figure 11 As shown, the end of the guide edge 7 ends before the bucket inlet end 102 of the circulating line body 10, that is, the guide rail 8 ends before the bucket inlet end 102 of the circulating line body 10, preventing the storage hopper 1 from continuing to slide along the guide rail 8 and affecting its return to the circulating line body 10 and continued rotation.

[0051] Furthermore, if Figure 10 As shown, the circulating line body 10 is provided with a bucket baffle 103 at the bucket outlet end 101. When the storage hopper 1 enters the elevator from the bucket outlet end 101 of the circulating line body 10, the bucket baffle 103 can block the storage hopper 1, assisting the storage hopper 1 to enter the elevator, preventing the storage hopper 1 from missing the elevator and disrupting the operation of the entire line, thereby improving the stability of the operation of the entire line; Figure 11 As shown, an inlet arc plate 104 is provided at the inlet end 102, and the top of the inlet arc plate 104 is provided with an arc surface that matches the path of the storage hopper 1 falling from the end of the elevator into the circulating line body 10. When the storage hopper 1 enters the inlet end 102 of the circulating line body 10 from the elevator, the rolling body 1 of the storage hopper 1 slides along the arc surface onto the circulating line body 10, and continues to gather and unload materials around the circulating line body 10 for packaging.

[0052] To sum up, the trailer-type elevator of the present invention ensures synchronous control of lifting, turning and rotating the storage hopper 1, thereby smoothly completing the circulation collection and unloading packaging; and in the process of the trailer-type elevator conveying the storage hopper 1, through the dragging cooperation of the inner side of the rolling body 11 and the towing hook 61, through the sliding cooperation of the outer side of the rolling body 11 and the lifting track 3 and the guide rail 8, and the steering wheel 41 assists the storage hopper 1 in steering, the storage hopper 1 can be lifted, unloaded, and rotated back to the circulation line body 10. This trailer-type elevator method has a simple structure and low production cost, thereby reducing the production cost of the packaging production line; secondly, the rolling cooperation of the inner side of the rolling body 11 and the towing hook 61, and the sliding cooperation of the outer side of the rolling body 11 and the lifting track 3 and the guide rail 8 can greatly reduce the friction resistance during the transmission process, thereby greatly reducing the risk of load on the single drive mechanism 21 of the trailer-type elevator. In addition, the use of a flexible chain plate 6 can greatly reduce the friction between the chain plate and the track, improve the operating stability, and reduce the number of maintenance times, increase the service life, thereby improving the production stability of the packaging production line.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bucket elevator, characterized in that: The invention comprises a plurality of storage hoppers (1), a single turntable drive device (2), and a lifting track (3), a turning track (4), and a rotating track (5) supported on both sides of the storage hopper (1); the lifting track (3), the turning track (4), and the rotating track (5) form a closed track; flexible chain plates (6) are provided in the closed tracks on both sides; and the single turntable drive device (2) is drivingly connected to the flexible chain plates (6) on both sides; Towing hooks (61) are provided at intervals on the flexible chain plate (6); rolling bodies (11) are provided on both sides of the storage hopper (1), and both sides of the storage hopper (1) are towed on the towing hooks (61) through the inner sides of the rolling bodies (11); The two sides of the storage hopper (1) slide on the top of the lifting track (3) through the outer side of the rolling body (11); the outer edges of the turning track (4) and the rotating track (5) are provided with guide edges (7), and guide rails (8) are formed between the outer edges of the turning track (4) and the rotating track (5) and the guide edges (7); on the turning track (4) and the rotating track (5), the two sides of the storage hopper (1) are limited in the guide rails (8) by sliding on the outer side of the rolling body (11), and a steering wheel (41) for assisting the storage hopper (1) in steering is provided in the middle of the turning track (4).

2. The bucket elevator according to claim 1, characterized in that: The rolling element (11) comprises an inner roller bearing (12), an outer roller bearing (13) and a fixed shaft (14); the inner rings of the inner roller bearing (12) and the outer roller bearing (13) are fixed on the fixed shaft (14); and the fixed shaft (14) is provided with a spacer (15) between the inner roller bearing (12) and the outer roller bearing (13).

3. The bucket elevator according to claim 2, characterized in that: The depth of the hanging groove of the towing hook (61) matches the outer diameter of the inner roller bearing (12), and a limiting arm (62) is extended from one side of the towing hook (61) to prevent the inner roller bearing (12) from sliding off.

4. The bucket elevator according to claim 1, characterized in that: The turntable single drive device (2) comprises a single drive mechanism (21), a drive shaft (22), and a driving turntable (23) and a driven turntable (24) located on both sides. The single drive mechanism (21) is connected to the drive shaft (22) in a driving manner. The drive shaft (22) passes through and fixes the driving turntables (23) on both sides. The driving turntables (23) on both sides are respectively located on both sides of the starting end of the lifting track (3); the driven turntables (24) on both sides are respectively located on both sides of the turning track (4); and the flexible chain plate (6) is wound around the driving turntable (23) and the driven turntable (24) along the closed track.

5. The bucket elevator according to claim 4, characterized in that: The steering wheel (41) is coaxially connected to the driven rotating discs (24) on both sides.

6. The bucket elevator according to claim 5, characterized in that: A downward bending limit plate (42) is provided at the end of the turning track (4), and the downward bending limit plate (42) is extended to the lower end of the steering wheel (41).

7. The bucket elevator according to claim 1, characterized in that: It also includes a frame (9), the lifting rail (3), the turning rail (4) and the rotary rail (5) are fixed on the frame (9), and gantry frames (91) are provided on the lifting rails (3) on both sides.

8. A packaging production line, characterized in that: It comprises a circulation line body (10), a material discharge unit, a packaging machine (20) and a trailer bucket elevator as described in any one of claims 1 to 7, wherein the trailer bucket elevator is located on one side of the circulation line body (10); the starting end of the circulation line body (10) close to the lifting track (3) is a bucket discharge end (101), and the end of the rotating track (5) is a bucket feed end (102), the starting end of the lifting track (3) is connected to the bucket discharge end (101), and the end of the rotating track (5) is connected to the bucket feed end (102), forming a circulation loop; the material discharge unit is located in the circulation loop, and the storage hopper (1) circulates and rotates on the circulation loop; a material discharge hopper (30) is provided below the turning track (4), and the hopper mouth of the material discharge hopper (30) is connected to the packaging machine (20).

9. The packaging production line according to claim 8, characterized in that: The end of the guide edge (7) ends before the bucket inlet end (102) of the circulating line body (10).

10. The packaging production line according to claim 9, characterized in that: The circulating line body (10) is provided with a bucket outlet baffle (103) at the bucket outlet end (101), and is provided with a bucket inlet arc plate (104) at the bucket inlet end (102).

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