Double-drive conveying device

Abstract

The utility model provides a double-drive conveying device, which relates to the field of conveying devices and comprises a frame, a first driving unit and a second driving unit. The first driving unit comprises a first conveying ring, and the first power source can drive the first conveying ring to rotate; the second driving unit comprises a second conveying ring and a second power source; the second power source can drive the second conveying ring to rotate; the first conveying ring is flush with the upper side face of the second conveying ring. The end point of the first conveying ring is aligned with the end point of the second conveying ring. According to the double-drive conveying device, the problem that in the prior art, when a double-path modified atmosphere packaging machine processes packaging boxes with different feeding speeds, efficiency is low is solved, and the packaging boxes with the different feeding speeds can be conveyed synchronously.

Description

Technical Field

[0001] This utility model relates to the field of conveying devices, specifically a dual-drive conveying device. Background Technology

[0002] In today's material handling and packaging industry, plate chain conveyors are widely used as a core conveying equipment. Chinese Patent Application No. 202220770562.4 discloses a synchronous personnel conveying device and system for an automobile production line, which details the basic structure and working principle of the plate chain conveyor.

[0003] Dual-channel modified atmosphere packaging machine (e.g.) Figure 1 As shown, it has two independent feed inlets, a first feed port 01 and a second feed port 02, designed to flexibly handle two different types of packaging tasks, guiding two rows of packaging boxes into the modified atmosphere packaging machine in an orderly manner to complete the precise packaging process. However, in the actual production connection process, a thorny problem was encountered.

[0004] When attempting to use a conventional single plate chain conveyor to transport two different types of packaging boxes in parallel, the varying belt speeds at the upstream production stages for each type of packaging cause the boxes to fail to arrive at the crucial film application system within the modified atmosphere packaging machine in a synchronized and orderly manner after converging on the plate chain conveyor. This means that to achieve efficient use of the packaging film (i.e., packaging two boxes simultaneously across the width of the film in a single application process), it is necessary to wait for the boxes on both conveyor belts with different speeds to reach their designated positions. The resulting time difference between the arrival of the two boxes at different speeds inevitably interferes with packaging efficiency.

[0005] Conversely, if, in order to solve the problem of different belt speeds and ensure that the two types of packaging boxes arrive at the first feed inlet 01 and the second feed inlet 02 simultaneously, two independent plate chain conveyors are hastily used, each with a suitable belt speed, to move the packaging boxes to the first feed inlet 01 and the second feed inlet 02. New problems then arise. How to arrange the two plate chain conveyors within a limited space becomes a major challenge. Slight misalignment in their relative positions, running distances, and coordination can easily lead to mutual interference, including but not limited to collision risks, material jams, and power imbalances. This can bring the entire packaging production line to a standstill, resulting in a significant reduction in production efficiency and a surge in maintenance costs. Utility Model Content

[0006] To address the aforementioned technical problems, the dual-drive conveying device provided by this utility model can synchronously convey materials with different belt speeds.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] The dual-drive conveying device provided by this utility model includes a frame, a first drive unit, and a second drive unit. The first drive unit includes a first conveying ring and a first power source. The first power source is fixed on the frame. The first conveying ring is fixed on the first power source. The first power source can drive the first conveying ring to rotate. The first conveying ring has a first bearing surface for carrying materials. The first bearing surface is located on the upper outer side of the annular surface of the first conveying ring. The second drive unit includes a second conveying ring and a second power source. The second power source is fixed on the frame. The second conveying ring is fixed on the second power source. The second power source can drive the second conveying ring to rotate. The second conveying ring has a second bearing surface for carrying materials. The second bearing surface is located on the upper outer side of the annular surface of the second conveying ring. The first bearing surface is horizontal. The second bearing surface is horizontal. The first bearing surface and the second bearing surface are flush. The end point of the first conveying ring is aligned with the end point of the second conveying ring.

[0009] The dual-drive conveying device provided by this utility model preferably includes a first conveying ring as an annular plate chain; the first power source includes a first motor, a first drive wheel shaft, and a first driven wheel shaft; the first motor is fixed on the frame; the first drive wheel shaft is rotatably fixed on the frame; the first driven wheel shaft is rotatably fixed on the frame; the annular plate chain is fixed around the first drive wheel shaft and the first driven wheel shaft; the first motor is drive-connected to the first drive wheel shaft; the second conveying ring is an annular plate chain; the second power source includes a second motor, a second drive wheel shaft, and a second driven wheel shaft; the second motor is fixed on the frame; the second drive wheel shaft is rotatably fixed on the frame; the second driven wheel shaft is rotatably fixed on the frame; the annular plate chain is fixed around the second drive wheel shaft and the second driven wheel shaft; the second motor is drive-connected to the second drive wheel shaft.

[0010] The dual-drive conveying device provided by this utility model preferably further includes two guardrails; the guardrails are fixed on the frame; the guardrails are higher than the first bearing surface; the material moving direction on the first bearing surface; the first conveying ring is disposed on the left side of the second conveying ring; the guardrail is disposed on the left side of the first conveying ring; the guardrail is disposed on the right side of the second conveying ring.

[0011] The dual-drive conveying device provided by this utility model preferably includes a guardrail comprising a circular tube and a level adjuster; the circular tube is horizontally positioned; the extension direction of the circular tube's axis is consistent with the movement direction of the first bearing surface; the circular tube is fixed on the level adjuster; the level adjuster can adjust the horizontal position of the circular tube; the horizontal adjustment direction of the level adjuster on the circular tube is perpendicular to the extension direction of the circular tube's axis.

[0012] The dual-drive conveying device provided by this utility model preferably further includes a plurality of transition wheel shafts; each transition wheel shaft includes a fixed shaft and a plurality of driven wheels; the fixed shaft is fixed on the frame; the driven wheels are coaxially and rotatably fixed on the fixed shaft; the upper rim of the driven wheels is flush with the first bearing surface; the axial direction of the fixed shaft is perpendicular to the moving direction of the first bearing surface; the fixed shaft is located at the end point of the first conveying ring and the end point of the second conveying ring.

[0013] The dual-drive conveying device provided by this utility model preferably includes a frame comprising several legs; the bottom of each leg is provided with an adjustable support component for adjusting the height.

[0014] The dual-drive conveying device provided by this utility model preferably includes an I-shaped column, a first right-angled folding plate, and a second right-angled folding plate in the frame; the I-shaped column, the first right-angled folding plate, and the second right-angled folding plate extend along the material conveying direction; the material moving direction is on the first bearing surface; the first conveying ring is disposed to the left of the second conveying ring; the first right-angled folding plate is disposed to the left of the first conveying ring; the right-angled inner surface of the first right-angled folding plate faces upward and to the right respectively; the upward-facing inner surface of the first right-angled folding plate supports the lower end of the upper chain of the annular plate chain of the first conveying ring; the right-facing inner surface of the first right-angled folding plate is attached to... The left end of the upper chain of the annular chain plate of the first conveying ring is located near the first conveying ring; the right side of the second conveying ring is provided with a second right-angled folding plate; the right-angled inner side of the second right-angled folding plate faces upward and left respectively; the upward-facing inner side of the second right-angled folding plate supports the lower end of the upper chain of the annular chain plate of the second conveying ring; the left-facing inner side of the second right-angled folding plate is abutted against the right end of the upper chain of the annular chain plate of the second conveying ring; the I-shaped post is disposed between the first conveying ring and the second conveying ring; the left side of the annular chain plate of the first conveying ring and the right side of the annular chain plate of the second conveying ring are respectively slidably accommodated in the grooves on both sides of the I-shaped post.

[0015] This utility model provides a dual-drive conveying device, relating to the field of conveying devices, including a frame, a first drive unit, and a second drive unit. The first drive unit includes a first conveying ring and a first power source. The first power source is fixed on the frame. The first conveying ring is fixed on the first power source. The first power source can drive the first conveying ring to rotate. The first conveying ring has a first bearing surface for carrying materials. The first bearing surface is located on the upper outer side of the annular surface of the first conveying ring. The second drive unit includes a second conveying ring and a second power source. The second power source is fixed on the frame. The second conveying ring is fixed on the second power source. The second power source can drive the second conveying ring to rotate. The second conveying ring has a second bearing surface for carrying materials. The second bearing surface is located on the upper outer side of the annular surface of the second conveying ring. The first bearing surface is horizontal. The second bearing surface is horizontal. The first bearing surface and the second bearing surface are flush. The end point of the first conveying ring is aligned with the end point of the second conveying ring. The dual-drive conveying device provided by this utility model solves the problem of low efficiency in existing dual-path modified atmosphere packaging machines when processing packaging boxes with different feeding speeds, and can achieve synchronous conveying of packaging boxes with different feeding speeds. Attached Figure Description

[0016] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the dual-drive conveyor device provided in Embodiment 1 of this utility model when it is fixed to a dual-path modified atmosphere packaging machine.

[0018] Figure 2 This is a schematic diagram showing the positional relationship between the first conveying ring and the second conveying ring of the dual-drive conveying device provided in Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the guardrail structure of the dual-drive conveyor provided in Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the transition wheel shaft structure of the dual-drive conveying device provided in Embodiment 1 of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the first power source and the second power source of the dual-drive conveying device provided in Embodiment 1 of this utility model.

[0022] Figure 6This is a schematic diagram of the structure of the first driven wheel shaft and the second driven wheel shaft of the dual-drive conveying device provided in Embodiment 1 of this utility model. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without inventive effort are within the protection scope of the present utility model.

[0024] Example 1: The dual-drive conveying device provided in Example 1 of this utility model, such as Figures 1 to 6 As shown, the system includes a first drive unit 1, a second drive unit 2, and a frame 3. The first drive unit 1 includes a first conveying ring 11 and a first power source 12. The first power source 12 is fixed to the frame 3. The first conveying ring 11 is fixed to the first power source 12. The first power source 12 can drive the first conveying ring 11 to rotate. The first conveying ring 11 has a first bearing surface 111 for carrying materials. The first bearing surface 111 is located on the upper side of the annular outer side of the first conveying ring 11. The second drive unit 2 includes a second conveying ring 21 and a second power source 3. A power source 22 is fixed on the frame 3; a second conveying ring 21 is fixed on the second power source 22; the second power source 22 can drive the second conveying ring 21 to rotate; the second conveying ring 21 has a second bearing surface 211 for carrying materials; the second bearing surface 211 is located on the upper side of the annular outer side of the second conveying ring 21; the first bearing surface 111 is horizontal; the second bearing surface 211 is horizontal; the first bearing surface 111 and the second bearing surface 211 are flush; the end point of the first conveying ring 11 is aligned with the end point of the second conveying ring 21.

[0025] Before being put into operation, the dual-drive conveyor device provided in Embodiment 1 of this utility model requires precise debugging. Specifically, the end point of the first conveyor ring 11 must be precisely aligned with the first feed inlet 01 of the dual-path modified atmosphere packaging machine to ensure that the first bearing surface 111 and the plane of the packaged box conveyed by the first feed inlet 01 are flush. At the same time, the end point of the second conveyor ring 21 should be aligned with the second feed inlet 02 of the dual-path modified atmosphere packaging machine so that the second bearing surface 211 and the plane of the packaged box conveyed by the second feed inlet 02 are perfectly fitted. Since the first power source 12 independently controls the movement of the first conveyor ring 11 and the second power source 22 independently controls the movement of the second conveyor ring 21, the two can achieve different belt speeds. When faced with two types of packaged boxes with different entry time intervals in the conveying stage, and needing to carry out modified atmosphere packaging operations simultaneously, the effect of simultaneously connecting the two types of packaged boxes to the first feed inlet 01 and the second feed inlet 02 can be achieved by flexibly adjusting the speed difference between the first conveyor ring 11 and the second conveyor ring 21. This effectively avoids situations where two types of packaging boxes arrive at the designated packaging position of the modified atmosphere packaging machine at different times, forcing a waiting strategy (or arranging the two types of packaging boxes neatly on both sides of a unified conveyor ring at the conveying point), ultimately leading to reduced packaging efficiency. For two types of packaging boxes with different time intervals when entering the conveying stage, in this embodiment, the movable material device (such as a robotic arm) is located on both sides of the conveying direction of the first conveyor ring 11 and the second conveyor ring 21, and the movable material device directly places the material at any position on the first conveyor ring 11 and the second conveyor ring 21.

[0026] The dual-drive conveying device provided in Embodiment 1 of this utility model solves the problem of low efficiency of dual-path modified atmosphere packaging machines in the prior art when processing packaging boxes with different feeding speeds, and can realize synchronous conveying of packaging boxes with different feeding speeds.

[0027] In the dual-drive conveying device involved in this embodiment, both the first conveying ring 11 and the second conveying ring 21 are transmission structures with a bearing surface on the upper side. In the current technical field, there are many structures that can achieve this function, such as ring belts, ring chains, and ring tracks with trolleys. However, considering that this device is mainly used to carry special products such as food packaging boxes, a specific implementation scheme was selected based on actual application requirements. In this embodiment, the first conveying ring 11 is a ring plate chain; the first power source 12 includes a first motor 121, a first drive wheel shaft 122, and a first driven wheel shaft 123; the first motor 121 is fixed on the frame 3; the first drive wheel shaft 122 is rotatably fixed on the frame 3; the first driven wheel shaft 123 is rotatably fixed on the frame 3; the ring plate chain is fixed around the first drive wheel shaft 122 and the first driven wheel shaft 123; the first motor 121 and the first drive wheel shaft 122 transmit power through the ring plate chain. The first conveying ring 11 and the second conveying ring 21 are both annular plate chains. The second power source 22 includes a second motor 221, a second drive wheel shaft 222, and a second driven wheel shaft 223. The second motor 221 is fixed on the frame 3. The second drive wheel shaft 222 is rotatably fixed on the frame 3. The second driven wheel shaft 223 is rotatably fixed on the frame 3. The annular plate chain is fixed around the second drive wheel shaft 222 and the second driven wheel shaft 223. The second motor 221 is connected to the second drive wheel shaft 222 in a transmission connection. Both the first conveying ring 11 and the second conveying ring 21 adopt annular plate chain structures. For the specific structure of the annular plate chain, please refer to the "A Synchronous Manned Conveying Device and System for Automobile Production Line" disclosed in Chinese Patent Application No. 202220770562.4. The patent mentions that "the surface of the conveying body (1) is provided with a plate chain (2) that is in a ring shape and can move in a ring-shaped cycle". In view of this, the specific structure of the annular plate chain in this embodiment will not be described in detail. In actual operation, the axes of the first drive wheel shaft 122 and the first driven wheel shaft 123 in the first power source 12 are parallel to each other. Their coordinated action forms a first bearing surface 111 with an upper planar surface on the first conveying ring 11. This first bearing surface 111 can smoothly carry and move a packaging box until it is transported to the first feed inlet 01. Similarly, the axes of the second drive wheel shaft 222 and the second driven wheel shaft 223 in the second power source 22 are also parallel to each other. Their combined action forms a second bearing surface 211 with an upper planar surface on the second conveying ring 21. This second bearing surface 211 can be used to carry and move another packaging box, ultimately delivering it to the second feed inlet 02.

[0028] As a preferred embodiment, this model also includes two guardrails 4; the guardrails 4 are fixed to the frame 3; the guardrails 4 are higher than the first bearing surface 111; the material movement direction on the first bearing surface 111; the first conveying ring 11 is located to the left of the second conveying ring 21; the guardrail 4 is located to the left of the first conveying ring 11; and the guardrail 4 is located to the right of the second conveying ring 21. Observing along the predetermined movement direction of the material on the first bearing surface 111, when the first conveying ring 11 is located to the left of the second conveying ring 21, in order to achieve all-round protection, a guardrail 4 is precisely installed on the left edge of the first conveying ring 11, and at the same time, a corresponding guardrail 4 is also installed on the right edge of the second conveying ring 21. These two guardrails 4 work together to form a tight protection for the packaging box moving on the first bearing surface 111 and the second bearing surface 211 from both sides, reducing the risk of the packaging box falling.

[0029] As a preferred embodiment, in this case, the guardrail 4 includes a circular tube 41 and a level adjuster 42. The circular tube 41 has a horizontally oriented shaft. The extension direction of the circular tube 41's shaft is consistent with the movement direction of the first bearing surface 111. The level adjuster 42 is fixed to the frame 3, and the circular tube 41 is fixed to the level adjuster 42. The level adjuster 42 can adjust its horizontal position along a direction perpendicular to the extension direction of the circular tube 41's shaft. The circular tube 41, as a key component directly preventing the packaging box from falling off, has its shaft set horizontally, and the extension direction of its shaft is strictly consistent with the movement direction of the material on the first bearing surface 111. This design allows the circular tube 41 to prevent the packaging box from slipping off both sides of the bearing surface during movement. The level adjuster 42 adjusts the horizontal position of the circular tube 41. It is fixed to the frame 3 in a stable manner (such as high-strength welding, suitable bolt connections, etc.) to ensure its stable position during device operation and prevent shaking or displacement due to external interference. The circular tube 41 is mounted on the leveling device 42, forming a tight connection to ensure that the adjustment action is accurately transmitted to the circular tube 41. The leveling device 42 can adjust the horizontal position of the circular tube 41, and the adjustment direction is perpendicular to the extension direction of the tube axis of the circular tube 41. This feature allows the operator to flexibly adjust the distance between the circular tube 41 and the bearing surface according to actual production needs, such as the size of the packaging box and the conveying speed, thereby achieving precise protection for packaging boxes of different specifications. In this preferred embodiment, the leveling device 42 adopts a simple and effective mechanical structure, which includes a bolt and a matching fixed threaded hole. The bolt is precisely installed in the threaded hole. By rotating the bolt, the bolt can move linearly within the threaded hole using the transmission principle of the thread. The end of the bolt is firmly fixed to the circular tube 41. When the bolt moves, it will drive the circular tube 41 to adjust its horizontal position synchronously.

[0030] As a preferred embodiment, this invention further includes several transition wheel shafts 5; each transition wheel shaft 5 includes a fixed shaft 51 and multiple driven wheels 52; the fixed shaft 51 is fixed to the frame 3; the driven wheels 52 are coaxially and rotatably fixed to the fixed shaft 51; the upper rim of the driven wheels 52 is flush with the first bearing surface 111; the axial direction of the fixed shaft 51 is perpendicular to the moving direction of the first bearing surface 111; the fixed shaft 51 is located at the end point of the first conveying ring 11 and the end point of the second conveying ring 21. The transition wheel shaft 5 consists of a fixed shaft 51 and multiple driven wheels 52. The fixed shaft 51 is installed on the frame 3 (by means of welding, bolting, etc.) to ensure that it remains stable during the operation of the device and does not shake or shift. Multiple driven wheels 52 are rotatably mounted on a fixed shaft 51 in a coaxial manner. This design allows the driven wheels 52 to rotate flexibly on the fixed shaft 51, providing a basis for the smooth transition of the packaging box. The upper rim of the driven wheels 52 is flush with the first bearing surface 111. This height consistency ensures that when the packaging box is transported from the first conveying ring 11 or the second conveying ring 21 to the end point, it can smoothly transition onto the driven wheels 52, avoiding jamming, tilting or even falling of the packaging box due to height difference, thereby effectively protecting the integrity of the packaging box and its contents.

[0031] As a preferred embodiment, in this case, the frame 3 includes several legs 31; the bottom of each leg 31 is provided with an adjustable support component for adjusting its height. The adjustable support component is existing technology and will not be elaborated upon here. In actual production applications, due to variations in the flatness of the ground and the different requirements for docking height with surrounding equipment in various factory workshops, logistics warehouses, etc., the height of the legs 31 can be easily fine-tuned by operating the adjustable support component, thereby driving the entire frame 3 to rise and fall, ultimately ensuring that the first bearing surface 111 reaches the ideal height for perfect adaptation with upstream and downstream equipment.

[0032] To specifically realize the movement of the first conveying ring 11 and the second conveying ring 21, in this embodiment, the frame 3 includes an I-shaped column 32, a first right-angled folding plate 33, and a second right-angled folding plate 34; the I-shaped column 32, the first right-angled folding plate 33, and the second right-angled folding plate 34 extend along the material conveying direction; on the first bearing surface 111 in the material moving direction; the first conveying ring 11 is located to the left of the second conveying ring 21; the first right-angled folding plate 33 is located on the left side of the first conveying ring 11; the right-angled inner surface of the first right-angled folding plate 33 faces upward and to the right respectively; the upward-facing inner surface of the first right-angled folding plate 33 supports the lower end of the upper chain of the annular plate chain of the first conveying ring 11; the first right-angled folding plate 33... The right-facing inner side of plate 33 is attached to the left end of the upper chain of the annular chain plate of the first conveying ring 11; a second right-angle folding plate 34 is provided on the right side of the second conveying ring 21; the right-angle inner side of the second right-angle folding plate 34 faces upward and left respectively; the upward-facing inner side of the second right-angle folding plate 34 supports the lower end of the upper chain of the annular chain plate of the second conveying ring 21; the left-facing inner side of the second right-angle folding plate 34 is attached to the right end of the upper chain of the annular chain plate of the second conveying ring 21; an I-shaped post 32 is disposed between the first conveying ring and the second conveying ring 21; the left side of the annular chain plate of the first conveying ring 11 and the right side of the annular chain plate of the second conveying ring 21 are slidably accommodated in the grooves on both sides of the I-shaped post 32. The first right-angle folding plate 33 and the second right-angle folding plate 34 strictly restrict the positions of the first conveying ring 11 and the second conveying ring 21 from the bottom and the side, respectively. This dual constraint mechanism can effectively prevent the first conveying ring 11 and the second conveying ring 21 from derailing during operation, ensuring the stability and reliability of the conveying system. The I-shaped column 32 not only provides a common support point for the first conveying ring 11 and the second conveying ring 21 from the middle, ensuring that the two conveying rings maintain a relatively stable positional relationship during operation, but also further limits their positions to prevent them from shifting. In addition, the upper side of the I-shaped column 32 has a fixed plane. When part of the packaging box moves above the I-shaped column 32, since the main body of the packaging box is still located on the first conveying ring 11 or the second conveying ring 21, this fixed plane can provide additional support and constraint, so that the packaging box will not easily move between the first conveying ring 11 and the second conveying ring 21, thereby ensuring the orderliness and accuracy of the material conveying process.

[0033] In summary, this utility model provides a dual-drive conveying device, relating to the field of conveying devices, including a frame, a first drive unit, and a second drive unit. The first drive unit includes a first conveying ring and a first power source. The first power source is fixed on the frame. The first conveying ring is fixed on the first power source. The first power source can drive the first conveying ring to rotate. The first conveying ring has a first bearing surface for carrying materials. The first bearing surface is located on the upper outer side of the annular surface of the first conveying ring. The second drive unit includes a second conveying ring and a second power source. The second power source is fixed on the frame. The second conveying ring is fixed on the second power source. The second power source can drive the second conveying ring to rotate. The second conveying ring has a second bearing surface for carrying materials. The second bearing surface is located on the upper outer side of the annular surface of the second conveying ring. The first bearing surface is horizontal. The second bearing surface is horizontal. The first bearing surface and the second bearing surface are flush. The end point of the first conveying ring is aligned with the end point of the second conveying ring. The dual-drive conveying device provided by this utility model solves the problem of low efficiency in existing dual-path modified atmosphere packaging machines when processing packaging boxes with different feeding speeds, and can achieve synchronous conveying of packaging boxes with different feeding speeds.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A dual-drive conveying device, characterized in that, Includes a frame, a first drive unit, and a second drive unit; The first drive unit includes a first conveying ring and a first power source; The first power source is fixed on the frame; The first conveying ring is fixed to the first power source; the first power source can drive the first conveying ring to rotate; the first conveying ring has a first bearing surface for bearing materials; the first bearing surface is located on the upper side of the outer ring of the first conveying ring; The second drive unit includes a second conveying ring and a second power source; The second power source is fixed on the frame; The second conveying ring is fixed to the second power source; the second power source can drive the second conveying ring to rotate; the second conveying ring has a second bearing surface for bearing materials; the second bearing surface is located on the upper side of the outer ring of the second conveying ring; The first bearing surface is horizontal; the second bearing surface is horizontal; the first bearing surface and the second bearing surface are flush; the end point of the first conveying ring is aligned with the end point of the second conveying ring.

2. The dual-drive conveying device as described in claim 1, characterized in that, The first conveying ring is a ring-shaped plate chain; the first power source includes a first motor, a first drive wheel shaft, and a first driven wheel shaft; The first motor is fixed on the frame; The first drive wheel shaft is rotatably fixed to the frame; the first driven wheel shaft is rotatably fixed to the frame. The annular plate chain is fixed around and on the first drive wheel shaft and the first driven wheel shaft; The first motor is connected to the first drive wheel shaft via a transmission. The second conveying ring is a ring-shaped plate chain; the second power source includes a second motor, a second drive wheel shaft, and a second driven wheel shaft; The second motor is fixed to the frame; The second drive wheel shaft is rotatably fixed to the frame; the second driven wheel shaft is rotatably fixed to the frame. The annular plate chain is fixed around and on the second drive wheel shaft and the second driven wheel shaft; The second motor is connected to the shaft of the second drive wheel via a transmission.

3. The dual-drive conveying device as described in claim 1, characterized in that, It also includes two guardrails; The guardrail is fixed to the frame; The guardrail is higher than the first load-bearing surface; In the material movement direction on the first bearing surface; the first conveying ring is disposed to the left of the second conveying ring; The guardrail is provided on the left side of the first conveying ring; the guardrail is provided on the right side of the second conveying ring.

4. The dual-drive conveyor device as described in claim 3, characterized in that, The guardrail includes a round tube and a leveling device; The tube shaft is horizontally positioned; the extension direction of the tube shaft is consistent with the moving direction of the first bearing surface. The leveling device is fixed to the frame; The circular tube is fixed to the level adjuster; The leveling device can adjust the horizontal position of the circular tube; the direction of the leveling device's adjustment of the horizontal position of the circular tube is perpendicular to the extension direction of the tube axis.

5. The dual-drive conveyor device as described in claim 1, characterized in that, It also includes several transition wheel axles; The transition wheel shaft includes a fixed shaft and multiple driven wheels; The fixed shaft is fixed to the frame; The driven wheel is rotatably fixed on the fixed shaft on the same axis. The upper rim of the driven wheel is flush with the first bearing surface; The axial direction of the fixed shaft is perpendicular to the moving direction of the first bearing surface; The fixed shaft is located at the end point of the first conveying ring and the end point of the second conveying ring.

6. The dual-drive conveyor device as described in claim 1, characterized in that, The frame includes several legs; the bottom of each leg is provided with an adjustable support component for adjusting the height.

7. The dual-drive conveying device as described in claim 2, characterized in that, The frame includes an I-shaped column, a first right-angled folding plate, and a second right-angled folding plate; The I-shaped column, the first right-angled folding plate, and the second right-angled folding plate are arranged to extend along the material conveying direction; In the material movement direction on the first bearing surface; the first conveying ring is disposed to the left of the second conveying ring; The first right-angled folding plate is provided on the left side of the first conveying ring; the right-angled inner surfaces of the first right-angled folding plate face upward and to the right respectively; The inner side of the first right-angled fold plate facing upwards is supported on the lower end of the upper chain of the annular chain of the first conveying ring; the inner side of the first right-angled fold plate facing right is attached to the left end of the upper chain of the annular chain of the first conveying ring. The second right-angled folding plate is provided on the right side of the second conveying ring; the right-angled inner surfaces of the second right-angled folding plate face upward and to the left respectively; The inner side of the second right-angled fold plate facing upwards is supported on the lower end of the upper chain of the annular chain of the second conveying ring; the inner side of the second right-angled fold plate facing left is attached to the right end of the upper chain of the annular chain of the second conveying ring. The I-shaped post is disposed between the first conveying ring and the second conveying ring; the left side of the annular plate chain of the first conveying ring and the right side of the annular plate chain of the second conveying ring are respectively slidably accommodated in the grooves on both sides of the I-shaped post.

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