Double-layer belt leveling and lifting conveyor

Abstract

The utility model relates to the field of stackers, in particular to a double-layer belt leveling and lifting conveyor which comprises a supporting frame, a lower belt conveying assembly is arranged on the top of the supporting frame, a pair of buffering assemblies are symmetrically arranged on the two sides of the lower belt conveying assembly, and the lower belt conveying assembly is provided with an upper belt conveying assembly through the buffering assemblies. The lower belt conveying assembly is arranged, materials are leveled in the conveying process, the first herringbone belt has the anti-skid function, and leveling and exhausting can be conducted on the materials in the conveying process easily; the upper belt conveying assembly is arranged to convey materials forwards and upwards and is matched with the lower belt conveying assembly, so that the materials can be leveled, the conveyed materials are smooth and consistent, and convenience is provided for subsequent operation.

Description

Technical Field

[0001] This utility model relates to the field of palletizing machines, and in particular to a double-layer belt leveling and lifting conveyor. Background Technology

[0002] The conveyor belt for a palletizer is the basic equipment used to transfer goods in a palletizer. It is also commonly known as a conveyor belt. Its main function is to transfer goods from the starting position to the palletizing head, thereby realizing the automated transfer of goods.

[0003] However, traditional conveyors have relatively low power transmission efficiency and usually use a single-layer belt for transportation. This results in inconsistent flatness of materials when they are stacked after transportation, which affects stacking efficiency. In addition, material deviation is prone to occur during material transportation. Furthermore, the lack of effective buffer devices to absorb and disperse the impact of materials on the conveyor leads to instability during use and shortens the service life of the conveyor. Utility Model Content

[0004] The purpose of this invention is to provide a double-layer belt leveling and lifting conveyor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: it includes a support frame, a lower belt conveyor assembly is provided on the top of the support frame, a pair of buffer assemblies are symmetrically arranged on both sides of the lower belt conveyor assembly, and an upper belt conveyor assembly is provided through the buffer assemblies.

[0006] In a preferred embodiment of this utility model, the lower belt conveyor assembly includes a pair of lower belt mounting frames symmetrically arranged on the top of the support frame. Several idlers are arranged between the two lower belt mounting frames. A bearing seat is provided on one side of each of the two lower belt mounting frames. A rotating shaft is inserted between the two bearing seats. A roller is sleeved on the outside of the rotating shaft. A sprocket is sleeved on one end of the rotating shaft. An SEW reducer is provided on one side of the support frame. A motor is provided on one side of the SEW reducer. A sprocket is provided on the transmission end of the motor. A transmission chain is provided between the sprocket and the sprocket. A protective shell is provided on the outside of the sprockets.

[0007] As a preferred embodiment of this utility model, each of the two lower belt mounting frames is provided with a bearing seat 2 on one side, the two bearing seats 2 are located on the side of the lower belt mounting frame away from the bearing seat 1, a rotating shaft 2 is inserted between the two bearing seats 2, a roller 2 is sleeved on the outside of the rotating shaft 2, a herringbone belt 1 is provided between the roller 1 and the roller 2, and the bottom of the herringbone belt 1 is in contact with the idler roller 1.

[0008] As a preferred embodiment of the present invention, the buffer assembly includes several mounting plates 1 disposed on one side of the lower belt mounting frame, each mounting plate 1 having a mounting post 1 disposed on one side, a mounting block 1 sleeved on the outer side of the mounting post 1, a mounting post 2 inserted through the side of the mounting block 1 away from the mounting post 1, a mounting plate 2 disposed at one end of the mounting post 2, and a limit plate disposed on one side of each pair of adjacent mounting plates 2.

[0009] As a preferred embodiment of this utility model, each of the two lower belt mounting brackets is provided with several mounting plates three on one side, and each of the several mounting plates three is provided with a mounting bracket one on one side. A nut one is provided in the middle of the several mounting brackets one, and a screw is spirally provided inside the nut one. A mounting plate four is provided on the outside of the screw, and the mounting plate four is located above the mounting bracket one. A nut two is provided in the middle of the mounting plate four, and the nut two is spirally connected to the screw. A nut three is spirally sleeved on the outside of the screw on the side of the nut two away from the nut one, and a spring is provided between the nut two and the nut three.

[0010] In a preferred embodiment of this utility model, the upper belt conveyor assembly includes a pair of symmetrically arranged upper belt mounting frames. The bottom of both upper belt mounting frames is connected to the mounting plate four. Several idlers two are arranged between the two upper belt mounting frames. A bearing seat three is arranged on one side of each of the two upper belt mounting frames. A rotating shaft three is inserted between the two bearing seats three. A roller three is sleeved on the outside of the rotating shaft three. A sprocket three is sleeved on one end of the rotating shaft three. A mounting frame two is arranged on one side of the top of the two upper belt mounting frames. An SEW reducer two is arranged on the mounting frame two. A motor two is arranged on one side of the SEW reducer two. A sprocket four is arranged on the transmission end of the motor two. A transmission chain is arranged between the sprocket three and the sprocket four. A protective shell two is provided on the outside of the sprocket three and the sprocket four.

[0011] As a preferred embodiment of this utility model, each of the two upper belt mounting frames is provided with a bearing seat four on one side, the two bearing seats four are located on the side of the upper belt mounting frame away from the bearing seat three, a rotating shaft four is inserted between the two bearing seats three, a roller four is sleeved on the outside of the rotating shaft four, a herringbone belt two is provided between the roller three and the roller four, and the top of the herringbone belt two is in contact with the idler roller two.

[0012] As a preferred embodiment of this utility model, a pair of through-beam photoelectric sensors are symmetrically arranged on both sides of the two lower belt mounting brackets, and the two through-beam photoelectric sensors are located between the first herringbone belt and the second herringbone belt.

[0013] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0014] 1. This utility model, by setting up a lower belt conveyor assembly, uses a combination of SEW reducer 1 and motor 1 to efficiently transmit power to roller 1 through sprocket 1, sprocket 2 and transmission chain, driving the herringbone belt 1 to run. Roller 2, as the driven roller, supports and changes the direction of the herringbone belt 1, ensuring the smooth operation of the herringbone belt 1. At the same time, the lower belt conveyor assembly levels the material during the conveying process. The herringbone belt 1 has an anti-slip function, which is conducive to leveling and venting the material during the conveying process. In addition, the sag of the herringbone belt 1 is reduced by the support of idler roller 1, ensuring the stable operation of the belt during the conveying process.

[0015] 2. This utility model effectively prevents materials from accidentally deviating during the conveying process by setting up a buffer component and a limiting plate, ensuring the accuracy of the conveying. At the same time, the spring can absorb and disperse the impact of the material on the upper and lower belt conveyor components, playing a good buffering role and extending the service life. In addition, by using the combination of screw, nut two, nut three and spring, the distance between the upper and lower belt conveyor components can be easily adjusted to adapt to materials of different thicknesses.

[0016] 3. This utility model, by setting up an upper belt conveyor assembly, allows motor two to efficiently transmit power to roller three through a combination of sprocket three, sprocket four, and a transmission chain, driving the herringbone belt two to run. Roller four, as a driven roller, supports and changes the direction of the herringbone belt two, ensuring its smooth operation. At the same time, the upper belt conveyor assembly conveys materials forward and upward, and cooperates with the lower belt conveyor assembly to level the materials, making the conveyed materials flat and facilitating subsequent operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the lower belt conveyor assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the buffer component structure of this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0022] Figure 6 This is a schematic diagram of the upper belt conveyor assembly of this utility model;

[0023] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0024] Figure 8 for Figure 6 Enlarged diagram of point D in the middle.

[0025] Reference numerals: Support frame 1, Lower belt conveyor assembly 2, Lower belt mounting frame 21, Bearing housing 1 22, Rotating shaft 1 23, Sprocket 1 24, SEW reducer 1 25, Motor 1 26, Sprocket 2 27, Protective shell 1 29, Bearing housing 2 210, Rotating shaft 2 211, Herringbone belt 1 212, Idler roller 1 215, Roller 1 213, Roller 2 214, Buffer assembly 3, Mounting plate 1 31, Mounting column 1 32, Mounting block 1 33, Mounting column 2 34, Mounting plate 2 35, Limiting plate 36, Mounting plate 3 37 Mounting bracket 1 (38), nut 1 (39), screw 310, nut 2 (311), mounting plate 4 (312), nut 3 (313), spring 314, upper belt conveyor assembly 4, upper belt mounting bracket 41, bearing housing 3 (42), rotating shaft 3 (43), roller 3 (44), sprocket 3 (45), mounting bracket 2 (46), SEW reducer 2 (47), motor 2 (48), sprocket 4 (49), protective shell 2 (410), bearing housing 4 (411), rotating shaft 4 (412), roller 4 (413), herringbone belt 2 (414), idler roller 2 (415), through-beam photoelectric sensor 5. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0027] like Figures 1-8 As shown, the present invention proposes a double-layer belt leveling and lifting conveyor, which includes a support frame 1. The support frame 1 serves as the skeleton of the entire conveyor, supporting and fixing all components to ensure the stability and safety of the equipment. A lower belt conveyor assembly 2 is provided on the top of the support frame 1. A pair of buffer assemblies 3 are symmetrically arranged on both sides of the lower belt conveyor assembly 2. An upper belt conveyor assembly 4 is provided on the lower belt conveyor assembly 2 through the buffer assemblies 3.

[0028] The lower belt conveyor assembly 2 includes a pair of symmetrically arranged lower belt mounting frames 21 on the top of the support frame 1. The lower belt mounting frames 21 provide the mounting base for other components in the lower belt conveyor assembly 2. Several idlers 215 are arranged between the two lower belt mounting frames 21. The idlers 215 support the herringbone belt 212, reduce the sag of the herringbone belt 212, and ensure stable operation. Each side of the two lower belt mounting frames 21 is provided with a bearing seat 22. A rotating shaft 23 is inserted between the two bearing seats 22. The combination of the bearing seat 22 and the rotating shaft 23 can support the roller 213, allowing it to rotate freely. The roller 213 is sleeved on the outside of the rotating shaft 23. The roller 213 contacts the herringbone belt 212 and interacts with it through friction. The force drives the herringbone belt 212 to run. One end of the shaft 23 is fitted with a sprocket 24. A SEW reducer 25 is installed on one side of the support frame 1, and a motor 26 is installed on the other side of the SEW reducer 25. The SEW reducer 25 and the motor 26 provide the power source for the lower belt conveyor assembly 2 to meet the driving requirements. The transmission end of the motor 26 is equipped with a sprocket 27. A transmission chain is installed between the sprocket 24 and the sprocket 27. The cooperation of the sprocket 24, the sprocket 27 and the transmission chain transmits the power of the motor 26 to the roller 213 and drives it to rotate. The outer side of the sprocket 24 and the sprocket 27 is covered with a protective shell 29. The protective shell 29 can effectively prevent the external environment from interfering with the sprocket 24, the sprocket 27 and the transmission chain.

[0029] Each of the two lower belt mounting brackets 21 has a bearing seat 210 on one side. The two bearing seats 210 are located on the side of the lower belt mounting bracket 21 away from the bearing seat 22. A rotating shaft 211 is inserted between the two bearing seats 210. The combination of bearing seat 210 and rotating shaft 211 can support roller 214, allowing it to rotate freely. Roller 214 is sleeved on the outside of rotating shaft 211. A herringbone belt 212 is set between roller 1 213 and roller 214. It is driven to rotate by the herringbone belt 212 through friction. Roller 214, as a driven roller, plays the role of supporting and changing the direction of herringbone belt 212, ensuring the smooth operation of herringbone belt 212. The bottom of herringbone belt 212 is in contact with idler roller 215.

[0030] The buffer assembly 3 includes several mounting plates 31 disposed on one side of the lower belt mounting frame 21. Each mounting plate 31 has a mounting post 32 on one side. A mounting block 33 is sleeved on the outside of the mounting post 32. A mounting post 34 is inserted through the mounting block 33 on the side away from the mounting post 32. A mounting plate 35 is disposed at one end of the mounting post 34. A limit plate 36 is disposed on one side of every two adjacent mounting plates 35. The combined use of the mounting plates 31, mounting posts 32, mounting blocks 33, mounting posts 34 and mounting plates 35 provides the mounting base for the limit plate 36. The limit plate 36 can effectively prevent the material from accidentally deviating during the conveying process.

[0031] Each of the two lower belt mounting brackets 21 has several mounting plates 37 on one side, and mounting brackets 38 on one side of each mounting plate 37. Nuts 39 are located in the middle of each mounting bracket 38. The mounting plates 37, mounting brackets 38, and nuts 39 provide the mounting base for the screw 310. The screw 310 is spirally mounted inside the nut 39. A mounting plate 312 is located outside the screw 310, above the mounting brackets 38. Nut 311 is located in the middle of the mounting plate 312 and spirally connected to the screw 310. Nut 313 is spirally mounted on the outside of the screw 310 on the side of nut 311 away from nut 39. A spring is installed between nut 311 and nut 313. The combination of screw 310, nut 2 311, nut 313 and spring 314 allows for adjustment of the distance between the upper belt conveyor assembly 4 and the lower belt conveyor assembly 2, adapting to various thicknesses of powdery or granular bagged raw materials. During the material leveling process, the upper belt conveyor assembly 4 and the lower belt conveyor assembly 2 experience some impact. Through the cooperation of screw 310, nut 2 311, nut 313 and spring 314, when subjected to external forces, spring 314 can absorb and disperse these forces, providing a buffering effect. Screw 310, nut 2 311 and nut 313 effectively prevent spring 314 from excessive extension and contraction and deviation, improving the stability of the double-layer belt leveling conveyor.

[0032] The upper belt conveyor assembly 4 includes a pair of symmetrically arranged upper belt mounting frames 41. The upper belt mounting frames 41 provide a mounting base for other components in the upper belt conveyor assembly 4. The bottom of both upper belt mounting frames 41 is connected to the mounting plate 312. Several idlers 415 are arranged between the two upper belt mounting frames 41 to ensure that the herringbone belt 414 is taut and does not sag during transportation. Bearing seats 42 are provided on one side of each of the two upper belt mounting frames 41. A rotating shaft 43 is inserted between the two bearing seats 42. The combination of bearing seats 42 and rotating shaft 43 can support roller 44, allowing it to rotate freely. A roller 44 is sleeved on the outside of the rotating shaft 43. The roller 44 contacts the herringbone belt 414 and drives the herringbone belt 414 through friction. A sprocket 4 is sleeved on one end of the rotating shaft 43. 5. Mounting bracket 2 46 is provided on one side of the top of the two upper belt mounting brackets 41. Mounting bracket 2 46 provides the mounting base for SEW reducer 2 47 and motor 2 48. SEW reducer 2 47 is mounted on mounting bracket 2 46. Motor 2 48 is mounted on one side of SEW reducer 2 47. SEW reducer 2 47 and motor 2 48 provide the power source for upper belt conveyor assembly 4 to meet the drive requirements. Sprocket 49 is provided at the transmission end of motor 2 48. A transmission chain is provided between sprocket 3 45 and sprocket 49. The cooperation of sprocket 3 45, sprocket 49 and transmission chain transmits the power of motor 2 48 to roller 3 44 and drives it to rotate. Protective shell 2 410 is provided on the outside of sprocket 3 45 and sprocket 49. Protective shell 2 410 can effectively prevent external environment interference to sprocket 3 45, sprocket 49 and transmission chain.

[0033] Each of the two upper belt mounting brackets 41 has a bearing seat 411 on one side. The two bearing seats 411 are located on the side of the upper belt mounting bracket 41 away from the bearing seat 3 42. A rotating shaft 412 is inserted between the two bearing seats 3 42. The combination of bearing seat 411 and rotating shaft 412 can support roller 413, allowing it to rotate freely. Roller 413 is sleeved on the outside of rotating shaft 412. A herringbone belt 2 414 is set between roller 3 44 and roller 413. It is driven to rotate by the herringbone belt 2 414 through friction. Roller 413, as a driven roller, plays the role of supporting and changing the direction of herringbone belt 2 414, ensuring the smooth operation of herringbone belt 2 414. The top of herringbone belt 2 414 is in contact with idler roller 2 415.

[0034] A pair of photoelectric sensors 5 are symmetrically arranged on both sides of the two lower belt mounting brackets 21. The two photoelectric sensors 5 are located between the first herringbone belt 212 and the second herringbone belt 414. The photoelectric sensors 5 provide signals for the start and stop of the PLC automatic control of the double-layer belt leveling and lifting conveyor, so as to save electricity and reduce production costs.

[0035] Before use, the operator first performs pre-start preparations, checking that all components are in normal working order and undamaged. After inspection, the double-layer belt leveling and lifting conveyor is started. Through the combined use of the photoelectric sensor 5 and the PLC, the photoelectric sensor 5 provides start and stop signals, and the PLC automatically controls the start and stop of the double-layer belt leveling and lifting conveyor. During start-up, the SEW reducer 25 and motor 26 in the lower belt conveyor assembly 2 drive the sprocket 27, ensuring that the conveying speed can be adjusted as needed. Optimal conveying effect is achieved through the controller. Sprocket 27 transmits power to sprocket 24 via a transmission chain, thereby driving the shaft 23 and roller 213 to rotate. Belt 212 drives shaft 211 and roller 214 to rotate. Roller 214, as a driven roller, supports and changes the direction of belt 212, ensuring its smooth operation. Idler roller 215 supports belt 212, reducing its sag and ensuring stable operation. Simultaneously, SEW reducer 47 and motor 48 in the upper belt conveyor assembly 4 drive sprocket 49. Sprocket 49 transmits power to sprocket 45 via a transmission chain, thereby driving shaft 43 and roller 44 to rotate. Belt 214 then drives shaft 412 and roller 413 to rotate. Roller 413, as a driven roller, supports and changes the direction of belt 212. The function of belt 2 (414) is to ensure the smooth operation of the herringbone belt 2 (414). Idler roller 2 (415) ensures that the herringbone belt 2 (414) is taut and does not sag during transportation. This completes the start-up of the lower belt conveyor assembly 2 and the upper belt conveyor assembly 4. The upper belt conveyor assembly 4 conveys materials forward and upward, while the lower belt conveyor assembly 2 levels the materials during the conveying process. Herringbone belt 1 (212) and herringbone belt 2 (414) have anti-slip properties, which facilitates leveling and air release of materials during the conveying process. The limiting plate 36 set between the upper belt conveyor assembly 4 and the lower belt conveyor assembly 2 can effectively prevent the materials from accidentally deviating during the conveying process. Screw 310, nut 2 (311), nut 3 (313) and spring 3... The combination of components 14 allows for adjustable distance between the upper belt conveyor assembly 4 and the lower belt conveyor assembly 2, suitable for bagged raw materials of various thicknesses, whether powdery or granular. During the material leveling process, the upper belt conveyor assembly 4 and the lower belt conveyor assembly 2 experience some impact. Through the cooperation of screw 310, nut 311, nut 313, and spring 314, the spring 314 absorbs and disperses external forces, providing a buffering effect. Screw 310, nut 311, and nut 313 effectively prevent excessive extension and contraction of the spring 314 and prevent deviation, improving the stability of the double-layer belt leveling conveyor and ensuring the conveyed material is flat, preparing it for subsequent stacking.

[0036] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A double-layer belt leveling and lifting conveyor, comprising: The support frame (1) is characterized in that: a lower belt conveyor assembly (2) is provided on the top of the support frame (1), a pair of buffer assemblies (3) are symmetrically arranged on both sides of the lower belt conveyor assembly (2), and an upper belt conveyor assembly (4) is provided on the lower belt conveyor assembly (2) through the buffer assemblies (3).

2. The double-layer belt leveling and lifting conveyor according to claim 1, characterized in that: The lower belt conveyor assembly (2) includes a pair of lower belt mounting frames (21) symmetrically arranged on the top of the support frame (1). Several idlers (215) are arranged between the two lower belt mounting frames (21). A bearing seat (22) is provided on one side of each of the two lower belt mounting frames (21). A rotating shaft (23) is inserted between the two bearing seats (22). A roller (213) is sleeved on the outside of the rotating shaft (23). A sprocket (24) is sleeved on one end of the rotating shaft (23). An SEW reducer (25) is provided on one side of the support frame (1). A motor (26) is provided on one side of the SEW reducer (25). A sprocket (27) is provided at the transmission end of the motor (26). A transmission chain is provided between the sprocket (24) and the sprocket (27). A protective shell (29) is provided on the outside of the sprocket (24) and the sprocket (27).

3. The double-layer belt leveling and lifting conveyor according to claim 2, characterized in that: Each of the two lower belt mounting brackets (21) is provided with a bearing seat 2 (210) on one side. The two bearing seats 2 (210) are located on the side of the lower belt mounting bracket (21) away from the bearing seat 1 (22). A rotating shaft 2 (211) is inserted between the two bearing seats 2 (210). A roller 2 (214) is sleeved on the outside of the rotating shaft 2 (211). A herringbone belt 1 (212) is provided between the roller 1 (213) and the roller 2 (214). The bottom of the herringbone belt 1 (212) is in contact with the idler roller 1 (215).

4. The double-layer belt leveling and lifting conveyor according to claim 3, characterized in that: The buffer assembly (3) includes several mounting plates (31) arranged on one side of the lower belt mounting frame (21). Each of the mounting plates (31) has a mounting post (32) on one side. A mounting block (33) is sleeved on the outside of the mounting post (32). A mounting post (34) is inserted through the side of the mounting block (33) away from the mounting post (32). A mounting plate (35) is provided at one end of the mounting post (34). A limit plate (36) is provided on one side of each pair of adjacent mounting plates (35).

5. A double-layer belt leveling and lifting conveyor according to claim 4, characterized in that: Each of the two lower belt mounting brackets (21) is provided with several mounting plates three (37) on one side, and a mounting bracket one (38) is provided on one side of each of the mounting plates three (37). A nut one (39) is provided in the middle of each of the mounting brackets one (38). A screw (310) is spirally provided inside the nut one (39). A mounting plate four (312) is provided on the outside of the screw (310). The mounting plate four (312) is located above the mounting bracket one (38). A nut two (311) is provided in the middle of the mounting plate four (312). The nut two (311) is spirally connected to the screw (310). A nut three (313) is spirally sleeved on the outside of the screw (310) on the side of the nut two (311) away from the nut one (39). A spring (314) is provided between the nut two (311) and the nut three (313).

6. A double-layer belt leveling and lifting conveyor according to claim 5, characterized in that: The upper belt conveyor assembly (4) includes a pair of symmetrically arranged upper belt mounting brackets (41). The bottom of both upper belt mounting brackets (41) is connected to the mounting plate (312). Several idler rollers (415) are arranged between the two upper belt mounting brackets (41). A bearing seat (42) is provided on one side of each of the two upper belt mounting brackets (41). A rotating shaft (43) is inserted between the two bearing seats (42). A roller (44) is sleeved on the outside of the rotating shaft (43). One end is fitted with a sprocket three (45), and the top side of the two upper belt mounting brackets (41) is provided with a mounting bracket two (46). The mounting bracket two (46) is provided with an SEW reducer two (47). The SEW reducer two (47) is provided with a motor two (48) on one side. The transmission end of the motor two (48) is provided with a sprocket four (49). A transmission chain is provided between the sprocket three (45) and the sprocket four (49). The outer sides of the sprocket three (45) and the sprocket four (49) are covered with a protective shell two (410).

7. A double-layer belt leveling and lifting conveyor according to claim 6, characterized in that: Each of the two upper belt mounting brackets (41) is provided with a bearing seat four (411) on one side. The two bearing seats four (411) are located on the side of the upper belt mounting bracket (41) away from the bearing seat three (42). A rotating shaft four (412) is inserted between the two bearing seats three (42). A roller four (413) is sleeved on the outside of the rotating shaft four (412). A herringbone belt two (414) is provided between the roller three (44) and the roller four (413). The top of the herringbone belt two (414) is in contact with the idler roller two (415).

8. A double-layer belt leveling and lifting conveyor according to claim 7, characterized in that: A pair of photoelectric sensors (5) are symmetrically arranged on both sides of the two lower belt mounting brackets (21), and the two photoelectric sensors (5) are located between the first herringbone belt (212) and the second herringbone belt (414).

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