Tray placing device

The automated design of the tray placement device solves the problem of low efficiency in manual placement of small parts, realizes the automated placement of empty trays, reduces labor intensity and production costs, and improves work efficiency.

CN224185326UActive Publication Date: 2026-05-01RONGCHEER IND TECH (SUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
RONGCHEER IND TECH (SUZHOU) CO LTD
Filing Date
2025-02-19
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

In the process of inspecting and packaging small parts, manual placement of trays is inefficient, takes up a lot of space, and increases production costs.

Method used

The device employs a tray-settling mechanism, including a tray-settling mechanism, a feeding mechanism, a material supply mechanism, and a conveying mechanism. It achieves automated placement of empty trays through a robotic arm and a drive component. The robotic arm places the product into the empty tray, the drive component drives the receiving component to switch positions, and the conveying mechanism transports the empty tray to the designated location.

Benefits of technology

It effectively reduces manual labor intensity, improves work efficiency, enables product placement without stopping the machine, has a compact structure, and allows for rapid position switching.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of automation, in particular to a plate placing device. The carrying mechanism carries the empty trays on the feeding mechanism to the first material receiving assembly or the second material receiving assembly, and the driving assembly drives the first material receiving assembly and the second material receiving assembly to carry out position switching on the tray placing frame. The manipulator drives the feeding gripper to place products on the feeding gripper in empty trays on the first material receiving assembly or the second material receiving assembly, so that tray placing and feeding of the empty trays are achieved, the products are automatically placed on the empty trays, the labor intensity of workers can be effectively reduced, the working efficiency is improved, and the production cost is reduced. The driving assembly drives the first material receiving assembly and the second material receiving assembly to perform position switching on the tray placing frame, so that the structure is more compact, rapid position switching of the first material receiving assembly and the second material receiving assembly is achieved, and products are placed without shutdown.
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Description

Technical Field

[0001] This utility model relates to the field of automation technology, and specifically to a tray-stacking device. Background Technology

[0002] In the manufacturing process of some products, it is necessary to inspect the finished product parts and then place the qualified parts into a tray for use in subsequent processes.

[0003] However, for some smaller parts, such as 3C components, accurate positioning is often required before testing and packaging. Due to the small size of the products and the large number of products to be tested and packaged each time, the process of placing the products on trays not only requires manual placement of the trays to the loading position, which consumes a lot of time and manpower and has low work efficiency, but also requires the preparation of multiple trays for simultaneous unloading to ensure product unloading efficiency. However, this requires a large processing space for tray placement, increasing production costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic product placement device that can effectively reduce manual labor intensity, improve work efficiency, and place products without stopping the machine.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A plating device, comprising:

[0007] A tray-setting mechanism includes a tray-setting frame, on which a first receiving component and a second receiving component are slidably mounted. The first and second receiving components are driven to be connected to a driving component, which is used to drive the first and second receiving components to switch positions on the tray-setting frame.

[0008] The feeding mechanism includes a robotic arm and a feeding gripper. The robotic arm is driven to connect with the feeding gripper. The robotic arm is used to drive the feeding gripper to place the product on it into an empty tray on a first receiving component or a second receiving component.

[0009] A feeding mechanism is arranged opposite to the tray-stacking mechanism, and the feeding mechanism is used to feed empty trays one by one;

[0010] A conveying mechanism is disposed between the feeding mechanism and the tray-loading mechanism. The conveying mechanism is used to convey the empty tray on the feeding mechanism to the first receiving component or the second receiving component.

[0011] In one embodiment of this utility model, the feeding gripper includes a gripper frame, and a plurality of material picking components are provided on the gripper frame. Each material picking component includes a material picking cylinder, which is mounted on the gripper frame and driven by a material picking nozzle. The material picking cylinder drives the material picking nozzle to pick up and place products.

[0012] In one embodiment of the present invention, the first receiving component includes a receiving frame, with guide frames at both ends of the receiving frame. The guide frames are slidably mounted on the tray frame. A first positioning plate is provided on the receiving frame. A plurality of first positioning blocks are provided on the first positioning plate. The plurality of first positioning blocks surround to form a first positioning station. A first positioning pin is provided on the first positioning station.

[0013] In one embodiment of the present invention, the second receiving component includes a sliding frame, which is slidably mounted on the tray frame. A lifting cylinder is provided on the sliding frame, and the lifting cylinder is drivenly connected to a second positioning plate. The width of the second positioning plate is less than the distance between the two guide frames, so that the driving component drives the second positioning plate to pass through the receiving frame to switch the positions of the first receiving component and the second receiving component.

[0014] In one embodiment of this utility model, a plurality of second positioning blocks are provided on the second positioning plate, and the plurality of second positioning blocks surround to form a second positioning station. A second positioning pin is provided on the second positioning station. Buffer blocks are provided on both sides of the plate rack, and the buffer blocks are arranged opposite to the sliding frame.

[0015] In one embodiment of this utility model, the driving component includes two rotating wheels, which are respectively disposed on both sides of the swivel frame. A synchronous belt is disposed between the two rotating wheels. The rotating wheels are driven and connected to a drive motor. The sliding frame is connected to the synchronous belt through a first frame, and the guide frame is connected to the synchronous belt through a second frame. The first frame and the second frame are respectively connected to the upper and lower sides of the synchronous belt. The drive motor drives the synchronous belt to rotate so as to drive the sliding frame and the receiving frame to move in opposite or opposite directions.

[0016] In one embodiment of this utility model, the conveying mechanism includes a conveying linear module, which is driven to a conveying frame. A conveying cylinder is provided on the conveying frame, and the conveying cylinder is driven to a conveying gripper. The conveying cylinder and the conveying linear module drive the conveying gripper to convey the empty material tray on the feeding mechanism.

[0017] In one embodiment of this utility model, the handling gripper includes a handling bracket, which is driven and connected to a handling cylinder. The handling bracket has handling plates on both sides, and the handling plates have waist-shaped grooves with spring suction nozzles on the waist-shaped grooves.

[0018] In one embodiment of this utility model, the feeding mechanism includes a feeding frame and a limiting component. Support cylinders are provided on both sides of the feeding frame, and the support cylinders are driven to support plates. A transfer linear module is provided between the limiting component and the feeding frame, and the transfer linear module is driven to lifting frame. A lifting cylinder is provided on the lifting frame, and the lifting cylinder is driven to lifting plate. The transfer linear module and the lifting cylinder drive the lifting plate to transfer the empty material tray on the feeding frame to the limiting component.

[0019] In one embodiment of this utility model, the limiting component includes a limiting frame, with limiting plates on both sides of the limiting frame and a gap between the two limiting plates to facilitate the lifting of the lifting plate. Multiple limiting blocks are provided on the limiting plates, forming a limiting station. A pushing cylinder is provided on the limiting plate, and the pushing cylinder is driven to the pushing block to push the empty material tray and position it at the limiting station.

[0020] The beneficial effects of this utility model are:

[0021] The conveying mechanism of this utility model transports the empty material tray on the feeding mechanism to the first receiving component or the second receiving component. The drive component drives the first receiving component and the second receiving component to switch positions on the tray rack. The robotic arm drives the feeding gripper to place the products on it into the empty material tray on the first receiving component or the second receiving component, thereby realizing the tray loading of empty material trays and automatically placing products on empty material trays. This can effectively reduce the intensity of manual labor and improve work efficiency. The drive component drives the first receiving component and the second receiving component to switch positions on the tray rack, making the structure more compact and realizing the rapid switching of the two positions without stopping the machine to place products. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a tray arrangement device according to the present invention.

[0023] Figure 2 This is a schematic diagram of the feeding gripper of this utility model.

[0024] Figure 3 This is a schematic diagram of the handling gripper of this utility model.

[0025] Figure 4 This is a schematic diagram of the tray-stacking mechanism of this utility model.

[0026] Figure 5 This is a schematic diagram of the first receiving component of this utility model.

[0027] Figure 6 This is a schematic diagram of the feeding mechanism of this utility model.

[0028] Explanation of the numbers in the diagram: 1. Feeding mechanism; 11. Robotic arm; 2. Feeding gripper; 21. Gripper frame; 22. Picking cylinder; 23. Picking block; 24. Picking nozzle; 3. Tray mechanism; 31. Tray frame; 32. First receiving assembly; 321. First positioning plate; 322. Guide frame; 323. First positioning block; 324. First positioning station; 325. Buffer block; 33. Second receiving assembly; 331. Sliding frame; 332. Lifting cylinder; 333. Second positioning plate; 334. Second positioning block; 34. Rotary wheel; 35. Synchronous belt; 36. Drive 37. Motor; 38. First frame; 4. Material tray; 5. Handling mechanism; 51. Linear handling module; 52. Handling frame; 53. Handling pneumatic cylinder; 6. Handling gripper; 61. Handling bracket; 62. Handling plate; 63. Waist-shaped groove; 64. Spring suction nozzle; 7. Feeding mechanism; 71. Feeding frame; 72. Support cylinder; 73. Support plate; 74. Linear transfer module; 75. Lifting frame; 76. Lifting cylinder; 77. Lifting plate; 8. Limiting component; 81. Limiting plate; 82. Gap; 83. Limiting block; 84. Pushing cylinder; 85. Pushing block. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0030] Reference Figure 1-6 As shown, a tray-stacking device includes:

[0031] The tray-setting mechanism 3 includes a tray-setting frame 31. A first receiving component 32 and a second receiving component 33 are slidably mounted on the tray-setting frame 31. The first receiving component 32 and the second receiving component 33 are driven to be connected to a driving component. The driving component is used to drive the first receiving component 32 and the second receiving component 33 to switch positions on the tray-setting frame 31.

[0032] The feeding mechanism 1 includes a robotic arm 11 and a feeding gripper 2. The robotic arm 11 is driven to connect with the feeding gripper 2. The robotic arm 11 is used to drive the feeding gripper 2 to place the product on it into the empty material tray 4 on the first receiving component 32 or the second receiving component 33.

[0033] The feeding mechanism 7 is arranged opposite to the tray-stacking mechanism 3, and the feeding mechanism 7 is used to feed empty trays 4 one by one;

[0034] The conveying mechanism 5 is disposed between the feeding mechanism 7 and the tray-loading mechanism 3. The conveying mechanism 5 is used to convey the empty tray 4 on the feeding mechanism 7 to the first receiving component 32 or the second receiving component 33.

[0035] The conveying mechanism 5 of this utility model transports the empty material tray 4 on the feeding mechanism 7 to the first receiving component 32 or the second receiving component 33. The driving component drives the first receiving component 32 and the second receiving component 33 to switch positions on the tray rack 31. The robotic arm 11 drives the feeding gripper 2 to place the products on it into the empty material tray 4 on the first receiving component 32 or the second receiving component 33, thereby realizing the tray loading of empty material tray 4 and automatically placing products on the empty material tray 4. This can effectively reduce the intensity of manual labor and improve work efficiency. The driving component drives the first receiving component 32 and the second receiving component 33 to switch positions on the tray rack 31, making the structure more compact and realizing the rapid switching of the two positions without stopping the machine to place products.

[0036] In one embodiment of this utility model, the feeding gripper 2 includes a gripper frame 21, on which a plurality of material picking components are provided. Each material picking component includes a material picking cylinder 22, which is mounted on the gripper frame 21. The material picking cylinder 22 is connected to a material picking block 23, which is slidably mounted on the gripper frame 21. The material picking block 23 is connected to a material picking nozzle 24, and the material picking cylinder 22 drives the material picking nozzle 24 to pick up and place products.

[0037] Specifically, the material-picking cylinder 22 drives the material-picking nozzle 24 to feed the product, and the robotic arm 11 drives the material-picking nozzle 24 on the gripper frame 21 to place the product in the empty material tray 4 for tray arrangement. The degree of automation is high, ensuring the product feeding efficiency.

[0038] In one embodiment of the present invention, the first receiving component 32 includes a receiving frame, and guide frames 322 are provided at both ends of the receiving frame. The guide frames 322 are slidably mounted on the tray frame 31. A first positioning plate 321 is provided on the receiving frame. A plurality of first positioning blocks 323 are provided on the first positioning plate 321. The plurality of first positioning blocks 323 surround to form a first positioning station 324. A first positioning pin is provided on the first positioning station 324.

[0039] Specifically, multiple first positioning blocks 323 are arranged to form a first positioning station 324 to position the empty material tray 4, so that different specifications of material tray 4 can be replaced according to the size of the product, thus achieving better versatility.

[0040] In one embodiment of this utility model, the second receiving component 33 includes a sliding frame 331, which is slidably mounted on the tray frame 31. A lifting cylinder 332 is provided on the sliding frame 331. The lifting cylinder 332 is drivenly connected to the second positioning plate 333. The width of the second positioning plate 333 is less than the distance between the two guide frames 322, so that the driving component drives the second positioning plate 333 to pass through the receiving frame to switch the positions of the first receiving component 32 and the second receiving component 33.

[0041] Specifically, the second receiving component 33 moves to the original position of the first receiving component 32. After the position switch is completed, the lifting cylinder 332 drives the second positioning plate 333 to rise to the same height as the first positioning plate 321. This allows for easy avoidance of the first positioning plate 321, making the structure more compact and enabling rapid switching between the two positions.

[0042] In one embodiment of this utility model, a plurality of second positioning blocks 334 are provided on the second positioning plate 333, and the plurality of second positioning blocks 334 surround to form a second positioning station. A second positioning pin is provided on the second positioning station. Buffer blocks 325 are provided on both sides of the tray rack 31. The buffer blocks 325 are arranged opposite to the sliding frame 331. By forming a second positioning station around the plurality of second positioning blocks 334, the empty tray 4 can be quickly positioned to ensure the accuracy of subsequent product loading.

[0043] In one embodiment of this utility model, the driving assembly includes two rotating wheels 34, which are respectively disposed on both sides of the swivel frame 31. A synchronous belt 35 is disposed between the two rotating wheels 34. The rotating wheels 34 are driven and connected to the drive motor 36. The sliding frame 331 is connected to the synchronous belt 35 through a first frame 37. The guide frame 322 is connected to the synchronous belt 35 through a second frame 38. The first frame 37 and the second frame 38 are respectively connected to the upper and lower sides of the synchronous belt 35. The drive motor 36 drives the synchronous belt 35 to rotate so as to drive the sliding frame 331 and the receiving frame to move in opposite or opposite directions.

[0044] Specifically, the drive motor 36 drives the synchronous belt 35 to rotate, thereby causing the sliding frame 331 and the receiving frame to move in opposite directions. Since the width of the second positioning plate 333 is less than the distance between the two guide frames 322, the drive assembly drives the second positioning plate 333 to pass through the receiving frame to switch the positions of the first receiving component 32 and the second receiving component 33. This causes the empty material tray 4 on the first positioning station 324 to move to the feeding mechanism 1, while the second receiving component 33 moves to the original position of the first receiving component 32. Using the same drive source ensures good consistency in the movement of both components, guaranteeing a rapid switching between the positions of the first receiving component 32 and the second receiving component 33. The structure is simple and reasonable.

[0045] In one embodiment of this utility model, the conveying mechanism 5 includes a conveying linear module 51, which is drivenly connected to the conveying frame 52. The conveying frame 52 is provided with a conveying air cylinder 53, which is drivenly connected to the conveying gripper 6. The conveying air cylinder 53 and the conveying linear module 51 drive the conveying gripper 6 to convey the empty material tray 4 on the feeding mechanism 7.

[0046] Specifically, the travel cylinder 53 and the travel linear module 51 form a two-axis motion module with their strokes perpendicular to each other, which drives the travel gripper 6 to move in space, thereby driving the travel gripper 6 to transport the empty material tray 4 on the feeding mechanism 7. This results in a high degree of automation and high transport efficiency.

[0047] In one embodiment of the present invention, the handling gripper 6 includes a handling bracket 61, which is driven and connected to the handling cylinder 53. The handling bracket 61 is provided with handling plates 62 on both sides, and the handling plates 62 are provided with waist-shaped grooves 63, and spring suction nozzles 64 are provided on the waist-shaped grooves 63.

[0048] Specifically, the linear transport module 51 drives the transport gripper 6 to the limit position, and the transport cylinder 53 drives the transport gripper 6 to move towards the empty material tray 4. The empty material tray 4 is picked up by the spring suction nozzles 64 at the four corners of the transport gripper 6, which can quickly and conveniently transport the empty material. The spring suction nozzles 64 can be adapted to various specifications of empty material trays 4, and have a wide range of applications.

[0049] In one embodiment of this utility model, the feeding mechanism 7 includes a feeding frame 71 and a limiting component 8. Support cylinders 72 are provided on both sides of the feeding frame 71. The support cylinders 72 are driven to be connected to the support plate 73. A transfer linear module 74 is provided between the limiting component 8 and the feeding frame 71. The transfer linear module 74 is driven to be connected to the lifting frame 75. A lifting cylinder 76 is provided on the lifting frame 75. The lifting cylinder 76 is driven to be connected to the lifting plate 77. The transfer linear module 74 and the lifting cylinder 76 drive the lifting plate 77 to transfer the empty material tray 4 on the feeding frame 71 to the limiting component 8.

[0050] Specifically, the support cylinders 72 on both sides of the feeding frame 71 drive the support plates 73 to support the stacked empty material trays 4. The lifting cylinder 76 drives the lifting plate 77 to lift the stacked empty material trays 4, causing them to detach from the support plates 73. The lifting cylinder 76 drives the lifting plate 77 to descend, so that the support cylinders 72 on both sides of the feeding frame 71 drive the support plates 73 to be inserted between the bottom two empty material trays 4 of the stacked empty material trays 4. The lifting cylinder 76 continues to drive the lifting plate 77 to descend, causing the empty material trays 4 to separate. This allows for rapid separation and feeding of the stacked empty material trays 4, resulting in high processing efficiency.

[0051] In one embodiment of this utility model, the limiting component 8 includes a limiting frame, with limiting plates 81 on both sides of the limiting frame. A gap 82 is provided between the two limiting plates 81 to facilitate the lifting plate 77 to rise and fall. Multiple limiting blocks 83 are provided on the limiting plates 81, and the multiple limiting blocks 83 surround to form a limiting station. A pushing cylinder 84 is provided on the limiting plate 81. The pushing cylinder 84 is driven to push the pushing block 85 and position the empty material tray 4 at the limiting station.

[0052] Specifically, the separated empty material tray 4 is transported to the limiting station by the transfer linear module 74. The lifting plate 77 passes through the gap 82 between the two limiting plates 81. The pushing cylinder 84 drives the pushing block 85 to push and position the empty material tray 4 at the limiting station, thereby completing the secondary positioning of the empty material tray 4, which facilitates the accuracy of subsequent transfer of the empty material tray 4 and reduces the processing difficulty.

[0053] Usage process

[0054] The support cylinders 72 on both sides of the feeding frame 71 drive the support plates 73 to support the stacked empty material trays 4. The lifting cylinder 76 drives the lifting plate 77 to push the stacked empty material trays 4 away from the support plates 73. The lifting cylinder 76 drives the lifting plate 77 to descend, so that the support cylinders 72 on both sides of the feeding frame 71 drive the support plates 73 to be inserted between the bottom two empty material trays 4. The lifting cylinder 76 continues to drive the lifting plate 77 to descend, so that the empty material trays 4 are separated. The separated empty material trays 4 are transported to the limit station by the transfer linear module 74. The lifting plate 77 passes through the gap 82. Between the two limiting plates 81, the pushing cylinder 84 drives the pushing block 85 to push and position the empty material tray 4 at the limiting station, thereby completing the positioning of the empty material tray 4. The transport linear module 51 drives the transport gripper 6 to move to the limiting station. The transport cylinder 53 drives the transport gripper 6 to move towards the empty material tray 4. After the empty material tray 4 is picked up by the spring suction nozzles 64 at the four corners of the transport gripper 6, it moves to the tray-swinging mechanism 3 under the guidance of the transport linear module 51. The transport cylinder 53 drives the empty material tray 4 on the transport gripper 6 to move towards the first receiving component 32 and places the empty material tray 4 on multiple first positioning blocks 323. On the first positioning station 324, the drive motor 36 drives the synchronous belt 35 to rotate, causing the sliding frame 331 and the receiving frame to move in opposite directions. Since the width of the second positioning plate 333 is less than the distance between the two guide frames 322, the drive assembly drives the second positioning plate 333 to pass through the receiving frame to switch the positions of the first receiving component 32 and the second receiving component 33. This causes the empty material tray 4 on the first positioning station 324 to move to the feeding mechanism 1. The robot arm 11 drives the picking nozzle 24 on the gripper frame 21 to place the product into the empty material tray 4 for tray placement. At the same time, the second receiving component 33 moves to the first receiving frame. At the original position of the material assembly 32, the lifting cylinder 332 drives the second positioning plate 333 to rise to the same height as the first positioning plate 321. The transport cylinder 53 and the transport linear module 51 drive the transport gripper 6 to transport and unload the material tray 4 filled with products. Then, the other empty material tray 4 moves to the second receiving assembly 33 under the guidance of the transport linear module 51. The transport cylinder 53 drives the empty material tray 4 on the transport gripper 6 to move towards the second positioning station. The empty material tray 4 is then placed in a group of second positioning blocks 334 to form the second positioning station. This completes the feeding and placement of the empty material tray 4, resulting in high processing efficiency.

[0055] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A tray-stacking device, characterized in that, include: A tray-setting mechanism includes a tray-setting frame, on which a first receiving component and a second receiving component are slidably mounted. The first and second receiving components are driven to be connected to a driving component, which is used to drive the first and second receiving components to switch positions on the tray-setting frame. The feeding mechanism includes a robotic arm and a feeding gripper. The robotic arm is driven to connect with the feeding gripper. The robotic arm is used to drive the feeding gripper to place the product on it into an empty tray on a first receiving component or a second receiving component. A feeding mechanism is arranged opposite to the tray-stacking mechanism, and the feeding mechanism is used to feed empty trays one by one; A conveying mechanism is disposed between the feeding mechanism and the tray-loading mechanism. The conveying mechanism is used to convey the empty tray on the feeding mechanism to the first receiving component or the second receiving component.

2. The tray-stacking device as described in claim 1, characterized in that, The feeding gripper includes a gripper frame, on which multiple material picking components are provided. Each material picking component includes a material picking cylinder, which is mounted on the gripper frame and is driven by a material picking nozzle. The material picking cylinder drives the material picking nozzle to pick up and place products.

3. The tray-stacking device as described in claim 1, characterized in that, The first receiving component includes a receiving frame, with guide frames at both ends of the receiving frame. The guide frames slide on the tray frame. A first positioning plate is provided on the receiving frame. Multiple first positioning blocks are provided on the first positioning plate. The multiple first positioning blocks surround to form a first positioning station. A first positioning pin is provided on the first positioning station.

4. The tray-stacking device as described in claim 3, characterized in that, The second receiving component includes a sliding frame that is slidably mounted on the tray frame. A lifting cylinder is mounted on the sliding frame and is driven by a second positioning plate. The width of the second positioning plate is less than the distance between the two guide frames, so that the driving component drives the second positioning plate through the receiving frame to switch the positions of the first receiving component and the second receiving component.

5. The tray-stacking device as described in claim 4, characterized in that, The second positioning plate is provided with a plurality of second positioning blocks, which surround to form a second positioning station. The second positioning station is provided with a second positioning pin. Buffer blocks are provided on both sides of the plate rack, and the buffer blocks are arranged opposite to the sliding frame.

6. The tray-stacking device as described in claim 4, characterized in that, The drive assembly includes two rotating wheels, which are respectively disposed on both sides of the swivel frame. A synchronous belt is provided between the two rotating wheels. The rotating wheels are driven and connected to a drive motor. The sliding frame is connected to the synchronous belt through a first frame, and the guide frame is connected to the synchronous belt through a second frame. The first frame and the second frame are respectively connected to the upper and lower sides of the synchronous belt. The drive motor drives the synchronous belt to rotate so as to drive the sliding frame and the receiving frame to move in opposite or opposite directions.

7. The tray-stacking device as described in claim 1, characterized in that, The conveying mechanism includes a conveying linear module, which is driven and connected to the conveying frame. The conveying frame is equipped with a conveying cylinder, which is driven and connected to the conveying gripper. The conveying cylinder and the conveying linear module drive the conveying gripper to convey the empty material tray on the feeding mechanism.

8. The tray-stacking device as described in claim 7, characterized in that, The handling gripper includes a handling bracket, which is driven and connected to a handling cylinder. The handling bracket has handling plates on both sides, and the handling plates have waist-shaped grooves with spring suction nozzles.

9. The tray-stacking device as described in claim 1, characterized in that, The feeding mechanism includes a feeding frame and a limiting component. Support cylinders are provided on both sides of the feeding frame. The support cylinders are driven to support plates. A transfer linear module is provided between the limiting component and the feeding frame. The transfer linear module is driven to lifting frame. A lifting cylinder is provided on the lifting frame. The lifting cylinder is driven to lifting plate. The transfer linear module and the lifting cylinder drive the lifting plate to transfer the empty material tray on the feeding frame to the limiting component.

10. The tray-stacking device as described in claim 9, characterized in that, The limiting component includes a limiting frame, with limiting plates on both sides of the limiting frame and a gap between the two limiting plates to facilitate the lifting of the lifting plate. Multiple limiting blocks are provided on the limiting plates, forming a limiting station. A pushing cylinder is provided on the limiting plate, and the pushing cylinder is driven by the pushing block. The pushing cylinder drives the pushing block to push the empty material tray and position it at the limiting station.