Tray drive system for microwave drying

Abstract

The utility model discloses a kind of tray transmission systems for microwave drying, it is related to tungsten ore powder drying process field.Aiming at the problems such as tray connection rigidity, transmission mechanism instability and box maintenance difficulty in prior art, the system includes drying box, tray assembly and transmission mechanism.Tray assembly is connected with chain through gravity self-adaptive hook structure, and posture is automatically balanced using gravity moment;Adopt split type tray, tray rack is inserted with tray, and convenient operation is realized through operating lever;Transmission mechanism is double sleeve roller chain structure, outer chain plate is provided with reinforcing rib, and torque is transferred by key connection;Drying box is split type, including upper box and lower box, integrated eddy current fan forms negative pressure environment, heat and moisture are discharged, and temperature in box is more uniform.The system improves drying continuity, stability and maintenance efficiency, reduces defective rate and energy consumption, and is suitable for tungsten ore powder drying or other high melting point metal powder drying in hard alloy field.

Description

Technical Field

[0001] This utility model relates to a drying process for high melting point metal powder (tungsten ore powder), specifically to a transmission system for a microwave drying tray. Background Technology

[0002] Tungsten ore powder, as a key industrial raw material with high melting point and high hardness, is widely used in the manufacturing of cemented carbide, cutting tools, and optical instruments. Its drying process is a core step in the production process, requiring efficient removal of moisture while ensuring the stability of the material's physicochemical properties. Microwave drying technology, due to its advantages such as uniform heating and low energy consumption, is gradually replacing traditional hot air or steam drying as the mainstream solution. However, the core challenge of microwave drying equipment lies in achieving continuous and stable material transfer within the drying chamber, which places extremely high demands on the structural design of the trays and transmission mechanisms.

[0003] I. Deficiencies in existing technology: 1. The connection between the pallet and the transmission mechanism is unreasonable.

[0004] Traditional equipment uses fixed pallets (such as welded or bolted connections). Without manual intervention, the pallet cannot maintain an upward-facing load-bearing surface throughout operation, leading to difficulties in unloading. The technical reasons for this are: Structural defects: Early drying equipment was designed for simplicity and did not consider the need for continuous automation; the tray could not adapt to gravity to adjust its posture and was rigidly connected to the transmission mechanism. Derivative problems include: difficulty in eliminating material accumulation and jamming, increased defect rate, low unloading efficiency, and high manual labor intensity.

[0005] 2. The pallet structure results in high frictional resistance.

[0006] Most existing pallets have a single welded base plate, which causes severe friction with the track during loading and unloading. The technical reasons for this are: Structural defects: The general-purpose drying equipment is not optimized for the characteristics of high-density mineral powder, and there is no separate design between the bottom plate and the support. Derivative problems include: higher material loss rate, increased energy consumption, inconvenience in pallet installation and disassembly, lower unloading efficiency, and higher manual labor intensity.

[0007] 3. Insufficient stability of the transmission mechanism Traditional belt or gear drives are prone to slippage and excessive noise under low-speed, high-load conditions (defect manifestations). The technical reasons are: Structural defects: The transmission design follows general industrial standards, lacks scenario customization, and is not adapted to the low-speed heavy-load requirements of tungsten ore powder drying; Derivative problems: poor drying uniformity (temperature fluctuation > ±10℃), high equipment failure rate.

[0008] 4. Difficulty in maintaining the enclosure The integral welded enclosure (a defect) necessitates a complete shutdown for maintenance. The technical reason is: Structural defects: Early microwave cavity designs prioritized sealing over maintainability, resulting in a non-separable, enclosed structure. Derivative problems: Maintenance time accounts for more than 30% of production time, resulting in significant capacity loss.

[0009] II. The aforementioned defects collectively lead to low drying efficiency, high defect rate, and escalating maintenance costs for tungsten ore powder. A dedicated transmission system is urgently needed to meet these requirements. The pallet's gravity adaptive design maintains the upward orientation of the load-bearing surface (eliminating the need for manual intervention in pallet orientation). Split pallet structure (facilitates pallet installation and removal, and reduces material loss). Split-type enclosure design (improves maintainability).

[0010] The aforementioned design guidelines have pointed the way for technological upgrades in the industry. Utility Model Content

[0011] The purpose of this invention is to provide a tray transmission system for microwave drying, which solves the problems of low unloading efficiency, frequent manual intervention, and material loss caused by the rigid connection between the tray and the transmission mechanism in traditional drying equipment.

[0012] To achieve the above objectives, the microwave drying tray transmission system of this utility model includes a drying chamber, a tray assembly, and a transmission mechanism. The tray assembly is connected to the transmission mechanism via a gravity-adaptive hook structure. The gravity-adaptive hook structure includes: The support rod is vertically fixed to the outer chain plate of the transmission mechanism via a connecting plate; The pallet pull rod has one end hinged to the pallet assembly via a pull ring, and the other end rotatably connected to the support rod via a connecting ring.

[0013] The pallet assembly includes a pallet frame and a pallet inserted into the pallet frame. The pallet is equipped with an operating lever for easy manual operation. The pallet frame is hinged to the pallet pull rod via a pull ring.

[0014] The transmission mechanism is a roller chain drive structure, including a driving sprocket, a driven sprocket, and a chain wound between the driving sprocket and the driven sprocket. The driving sprocket is mounted on the drying chamber via a driving shaft, and the driven sprocket is mounted on the drying chamber via a driven shaft. The driving shaft and the driven shaft are respectively mounted on the drying chamber via bearings.

[0015] The drying chamber adopts a split structure, including an upper chamber and a lower chamber. The upper chamber is equipped with an upper bearing seat, and the lower chamber is equipped with a lower bearing seat. After the upper and lower chambers are fastened together, the upper and lower bearing seats are fixed together by bolts to form a complete bearing seat. The bearing seat corresponds one-to-one with the drive shaft and the driven shaft. The drive shaft and the driven shaft are rotatably connected to the drying chamber through the corresponding bearing seats.

[0016] The outer chain plate of the chain is provided with reinforcing ribs and through holes, the through holes having a diameter of 31mm and being used for connecting plates.

[0017] The side wall of the lower or upper housing is integrated with a vortex fan, which is used to exhaust the hot and humid gas inside the housing.

[0018] The support rod is connected to the connecting plate by nuts and washers, and the connecting plate is connected to the outer chain plate of the chain. Two sets of driving sprockets, driven sprockets and chains are spaced apart in the width direction of the drying chamber. Two sets of gravity adaptive hook structures are provided corresponding to the two chains. The two sets of gravity adaptive hook structures share the same support rod. The tray assembly is located between the two chains in the width direction of the drying chamber and is connected to the two chains through the two sets of gravity adaptive hook structures.

[0019] The driving sprocket and the driven sprocket are respectively connected to the driving shaft and the driven shaft by keys.

[0020] This utility model has the following advantages: The hook structure allows the pallet to automatically remain horizontal under gravity (keeping the load-bearing surface facing upwards), reducing friction and manual intervention, enabling continuous automated drying, and improving efficiency and stability.

[0021] The optimized transmission mechanism ensures low-speed, high-torque transmission, adapts to the drying load of tungsten ore powder, facilitates assembly, and improves stability and drying uniformity.

[0022] Reinforcing ribs enhance the chain's tensile strength, while through holes ensure a secure connection with the support rod, extending its service life.

[0023] The split design facilitates assembly and maintenance, while the dehumidification system optimizes the drying environment and improves microwave drying efficiency. Keyed connections transmit high torque, preventing slippage and ensuring transmission accuracy. The split structure of the pallet assembly facilitates both the movement of the pallet assembly with the chain and unloading.

[0024] The drying chamber adopts a split structure, which improves the maintainability of this invention, making it easy to open the upper chamber for maintenance of the internal structure, shortening maintenance time and improving maintenance efficiency. Two sets of gravity-adaptive hook structures enhance the stability of the tray, and nuts and washers ensure transmission reliability. Attached Figure Description

[0025] Figure 1 This is a half-sectional structural diagram of the present invention.

[0026] Figure 2 yes Figure 1 AA sectional view. Figure 2 Connector 3 is not shown in the image, but it is visible in a magnified view. Figure 5 Connector plate 3 is shown.

[0027] Figure 3 yes Figure 1 The left view.

[0028] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 5 yes Figure 2 Enlarged view of point B in the middle.

[0030] Description of each component in the diagram: 1. Tray assembly 1 Installation location: Inside the drying chamber, between the two chains 4.

[0031] Structural relationship: It consists of a pallet frame 20 and a pallet inserted into the pallet frame. The pallet frame is hinged to the pallet pull rod 6 via a pull ring 7. The pallet is equipped with an operating lever 21.

[0032] Working principle and technical function: The tungsten ore powder is suspended below the support rod 2 by gravity adaptive hook structure. It automatically balances its posture by using the gravitational torque with the center of gravity located below the hinge point to ensure that the bearing surface is horizontal (levelness error < 0.5°). After moving to the unloading position with the chain, the pallet is pulled out by operating lever 21 to complete the unloading, realizing the continuous transmission and automated unloading of tungsten ore powder.

[0033] 2. Support rod 2 Installation location: It is vertically fixed to the outer chain plate 5 of the chain 4 via the connecting plate 3, located at the two chains in the width direction of the drying chamber.

[0034] Structural relationship: It is connected to the outer chain plate 5 through the connecting plate 3, and is rotatably connected to the pallet pull rod 6 through the connecting ring 8; the two sets of gravity adaptive hook structures share the same support rod 2.

[0035] Working principle and technical function: As the core support component connecting the chain and the pallet lever, it transmits the driving force of the chain and allows the pallet lever to rotate around it, realizing adaptive adjustment of the pallet posture and ensuring structural stability during the transmission process.

[0036] 3. Connecting plate 3 Installation location: between support rod 2 and outer chain plate 5 of chain 4.

[0037] Structural relationship: It is fixed to the support rod 2 by nut 19 and washer, and is also bolted to the outer chain plate 5. The through hole diameter is 31mm.

[0038] Working principle and technical function: The support rod 2 is rigidly fixed to the chain 4, which strengthens the tensile strength of the connection part, ensures that the support rod 2 does not undergo relative displacement during transmission, and improves the load capacity (pitch error < 0.1mm).

[0039] 4. Chain 4 (chains 4 on both the left and right sides) Installation location: Two sets (left and right) are spaced apart along the width of the drying chamber and are wound between the drive sprocket 9 and the driven sprocket 10.

[0040] Structural relationship: The roller chain drive structure is adopted. The outer chain plate 5 is provided with reinforcing ribs and through holes, and is connected to the support rod 2 through the connecting plate 3.

[0041] Working principle and technical function: It transmits the torque of the drive sprocket 9, driving the tray assembly 1 to move along the length of the drying chamber (low speed operation 1 meter / minute); the reinforcing ribs resist tensile deformation, ensure structural stability under load, and realize continuous material transfer.

[0042] 5. External Link Plate 5 Location: The outer chain plate of chain 4.

[0043] Structural relationship: The integrated reinforcing ribs and through holes (31mm in diameter) are connected to the support rod 2 via the connecting plate 3.

[0044] Working principle and technical function: The core load-bearing component of the chain, the reinforcing ribs improve the tensile strength of the chain 4, and the through holes are used to fix the connecting plate 3 to ensure the structural rigidity during transmission.

[0045] 6. Pallet pull rod 6 Installation location: between tray assembly 1 and support rod 2.

[0046] Structural relationship: One end is hinged to the pallet frame 20 via a pull ring 7, and the other end is rotatably connected to the support rod 2 via a connecting ring 8.

[0047] Working principle and technical function: The pallet's gravity adaptive adjustment is achieved by using the hinge structure. The center of gravity of the pallet is located below the hinge point (support rod 2). The need for manual leveling is eliminated by balancing the gravitational torque, ensuring that the pallet's levelness error is <0.5° and reducing material accumulation and jamming.

[0048] 7. Pull ring 7 Installation location: End of pallet rack 20.

[0049] Structural relationship: The hinged component connecting the pallet frame 20 and the pallet pull rod 6.

[0050] Working principle and technical function: It provides rotational freedom between the pallet frame and the pallet lever, allowing the pallet to rotate around the pull ring 7 to adapt to the movement trajectory of the chain 4, ensuring the flexibility of posture adjustment.

[0051] 8. Connecting ring 8 Installation position: Located at the other end of the tray lever 6, relative to the pull ring 7.

[0052] Structural relationship: Rotating component connecting pallet pull rod 6 and support rod 2.

[0053] Working principle and technical function: As the hinge point for the pallet pull rod 6 to rotate around the support rod 2, it works with gravity to achieve automatic balance of the pallet posture, ensuring that the pallet always has the bearing surface facing upward.

[0054] 9. Drive sprocket 9 Installation location: One end of the drying chamber, mounted on the drive shaft 11.

[0055] Structural relationship: It is connected to the drive shaft 11 via a key and meshes with the chain 4 for transmission.

[0056] Working principle and technical function: External power (torque) is transmitted to the drive shaft 11 through the key, driving the chain 4 to move smoothly and ensuring no slippage under low speed and high load (load error < 0.1mm).

[0057] 10. Driven sprocket 10 Installation location: At the other end of the drying chamber, mounted on the driven shaft 12.

[0058] Structural relationship: It is connected to the driven shaft 12 by a key and meshes with the chain 4.

[0059] Working principle and technical function: guides chain 4 to turn and tension, and works with drive sprocket 9 to form a closed transmission chain, ensuring the stability of the chain's running trajectory.

[0060] 11. Drive shaft 11 Installation location: One end of the drying chamber, mounted in a bearing housing consisting of upper bearing seat 15 and lower bearing seat 16 via bearings. External power is input by connecting to an external drive unit (such as a motor) via a coupling.

[0061] Structural relationship: It is connected to the drive sprocket 9 by a key, and both ends are supported by bearings.

[0062] Working principle and technical function: It transmits the torque of the external drive device, and transmits the torque to the chain 4 through the drive sprocket 9, driving the pallet assembly 1 to move. The bearing seat design reduces rotational friction and improves transmission efficiency.

[0063] 12. Driven shaft 12 Installation location: At the other end of the drying chamber, it is installed in the bearing housing via a bearing.

[0064] Structural relationship: It is connected to the driven sprocket 10 by a key and supports the driven end of the chain 4.

[0065] Working principle and technical function: Support the driven sprocket 10 and guide the chain 4 to turn, ensure chain tension, and prevent tooth skipping or slippage during operation.

[0066] 13. Upper box 13 Installation location: Upper part of the drying chamber, which is fastened to the lower chamber 14.

[0067] Structural relationship: An upper bearing seat 15 is provided, which is connected to the lower housing 14 through a quick-release flange structure.

[0068] Working principle and technical function: Together with the lower chamber 14, it forms a closed drying chamber. The upper bearing seat 15 and the lower bearing seat 16 are combined to form a complete bearing support. Disassembly can be completed within 10 minutes, improving maintenance efficiency.

[0069] 14. Lower box 14 Installation location: lower part of the drying chamber.

[0070] Structural relationship: A lower half bearing seat 16 is provided, which is fixed to the upper housing 13 by bolts 17.

[0071] Working principle and technical function: bearing transmission mechanism and pallet assembly 1.

[0072] 15. Upper half bearing housing 15 Installation position: Lower end of upper housing 13, corresponding to the bearing positions of drive shaft 11 and driven shaft 12.

[0073] Structural relationship: It is engaged with the lower half bearing seat 16 of the lower housing 14 and fixed by bolts 17 to form a complete bearing seat.

[0074] Working principle and technical function: The bearings fix the driving shaft 11 and driven shaft 12 to ensure the coaxiality of the shaft system rotation and reduce vibration and noise.

[0075] 16. Lower half bearing housing 16 Installation position: upper end of the lower housing 14, corresponding to the upper bearing seat 15.

[0076] Structural relationship: Combined with the upper bearing housing 15, it forms a bearing support structure.

[0077] Working principle and technical function: Supports the weight of the shaft system, and works with the upper bearing housing 15 to achieve stable rotation of the shaft and ensure transmission accuracy.

[0078] 17. Bolt 17 Installation location: The connection between the upper bearing housing 15 and the lower bearing housing 16 forms a quick-release flange structure.

[0079] Structural relationship: runs through the upper and lower bearing housings and is fastened by threads.

[0080] Working principle and technical function: To ensure the structural rigidity and sealing of the split box after it is snapped together, and to prevent heat leakage or dust from entering during the drying process.

[0081] 18. Vortex fan Installation location: the side wall of the lower housing 14 or the upper housing 13.

[0082] Structural relationship: It is connected to the inside of the drying chamber to exhaust hot and humid gases.

[0083] Working principle and technical function: It creates a negative pressure environment to accelerate moisture evaporation, keeps the temperature gradient inside the chamber ≤2℃ / m, improves drying uniformity, and reduces the defect rate.

[0084] 19. Nuts Installation locations: the connection between support rod 2 and connecting plate 3, and the connection between connecting plate 3 and outer chain plate 5.

[0085] Structural relationship: It is used in conjunction with bolts, and the preload is enhanced by shims.

[0086] Working principle and technical function: to fasten connecting parts, prevent loosening due to vibration during transmission, and ensure structural stability.

[0087] 20. Pallet rack 20 Installation location: The frame portion of tray assembly 1, located between the two chains 4.

[0088] Structural relationship: The insert tray is hinged to the tray pull rod 6 via the pull ring 7.

[0089] Working principle and technical function: It carries the pallet and moves with the chain 4. The pull-out structure (similar to a drawer) and the operating lever 21 enable convenient operation.

[0090] 21. Control lever 21 Installation location: End of the pallet, extending 20mm beyond the pallet frame.

[0091] Structural relationship: It is fixedly connected to the tray and can be held manually.

[0092] Working principle and technical function: The pallet is separated from the pallet frame 20 by pulling it out, and the pallet is inserted into the pallet frame 20 by pushing it out, which facilitates unloading and reduces labor intensity. Detailed Implementation

[0093] like Figures 1 to 5As shown, the microwave drying tray transmission system of this utility model includes a drying chamber, a tray assembly 1, and a transmission mechanism. The tray assembly 1 is connected to the transmission mechanism through a gravity-adaptive hook structure. The gravity-adaptive hook structure includes: The support rod 2 is vertically fixed to the outer chain plate 5 of the chain 4 of the transmission mechanism via the connecting plate 3; The pallet pull rod 6 has one end hinged to the pallet assembly 1 via a pull ring 7, and the other end rotatably connected to the support rod 2 via a connecting ring 8.

[0094] The hook structure allows the pallet to automatically remain horizontal (with the bearing surface facing upward) under the action of gravity and hang below the support rod 2, reducing friction and manual intervention, achieving continuous automated drying, and improving efficiency and stability.

[0095] The transmission mechanism is a roller chain drive structure, including a drive sprocket 9, a driven sprocket 10, and a chain 4 wound between the drive sprocket 9 and the driven sprocket 10. The drive sprocket 9 is rotatably connected to the drying chamber via a drive shaft 11, and the driven sprocket 10 is rotatably connected to the drying chamber via a driven shaft 12. The drive shaft 11 and the driven shaft 12 are respectively mounted on the drying chamber via bearings.

[0096] Two sets of driving sprocket 9, driven sprocket 10, and chain 4 are spaced apart along the width of the drying chamber. Two sets of gravity-adaptive hook structures are provided, each corresponding to one of the two chains 4. The tray assembly 1 is located between the two chains 4 along the width of the drying chamber and is connected to the two chains 4 via the gravity-adaptive hook structures. The two sets of gravity-adaptive hook structures corresponding to the same tray assembly 1 share a single support rod 2.

[0097] Specifically, the drying chamber adopts a split structure, including an upper chamber 13 and a lower chamber 14. The upper chamber 13 is provided with an upper bearing seat 15, and the lower chamber 14 is provided with a lower bearing seat 16. After the upper chamber 13 and the lower chamber 14 are fastened together, the upper bearing seat 15 and the lower bearing seat 16 are fixed together by bolts 17 to form a complete bearing seat. The bearing seat corresponds one-to-one with the drive shaft 11 and the driven shaft 12. The drive shaft 11 and the driven shaft 12 are rotatably connected to the drying chamber through the corresponding bearing seats.

[0098] The drive sprocket 9 and driven sprocket 10 are preferably made of 40Cr alloy steel with nitriding treatment. The nitrided layer has a hardness of ≥1000HV, improving wear resistance by 3 times, and is suitable for the high-wear environment of tungsten ore powder. The upper housing 13 and the lower housing 14 are connected by a quick-release flange (not marked), which allows the housing to be disassembled within 10 minutes, greatly improving maintenance efficiency.

[0099] The optimized transmission mechanism ensures low-speed, high-torque transmission, adapts to the drying load of tungsten ore powder, facilitates assembly, and improves stability and drying uniformity.

[0100] The outer chain plate 5 of the chain 4 is provided with reinforcing ribs and through holes. The through holes have a diameter of 31mm and are used to fix the connecting plate 3. The reinforcing ribs increase the tensile strength of the chain 4, and the through holes ensure a firm connection with the support rod 2, extending its service life.

[0101] The drying chamber has dimensions of 5496×1320×2324mm; the side wall of the lower chamber 14 or the upper chamber 13 is integrated with a vortex fan 18, which is used to discharge the hot and humid gas inside the chamber, forming a negative pressure environment to accelerate moisture evaporation, improve drying uniformity, optimize the drying environment, and improve microwave drying efficiency.

[0102] The support rod 2 is connected to the connecting plate 3 via a nut 19 and a washer. The connecting plate 3 is connected to the outer chain plate 5 of the chain 4. The nut 19 and the washer press the connecting plate 3 firmly onto the outer chain plate 5 of the chain 4. Two sets of gravity-adaptive hook structures enhance the stability of the pallet, while the nuts and washers ensure transmission reliability. The driving sprocket 9 and the driven sprocket 10 are respectively connected to the driving shaft 11 and the driven shaft 12 via keys. The keyed connection transmits high torque, avoids slippage, and ensures transmission accuracy.

[0103] The pallet assembly 1 includes a pallet frame 20 and a pallet inserted into the pallet frame 20. The pallet is equipped with an operating lever 21 for easy manual operation. The pallet frame 20 is hinged to the pallet pull rod 6 via a pull ring 7. The pull-out structure of the pallet and the pallet frame 20 can be a pull-out structure of a drawer frame and a drawer, which is existing technology and will not be described in detail. Figure 4 The middle pallet is located inside the pallet rack 20 and is not visible; the pallet is not individually labeled. Figure 4 The image shows that during normal drying operation, the operating lever 21 extends out of the tray frame 20.

[0104] The split structure design of pallet assembly 1 facilitates the movement of pallet assembly 1 along with chain 4 and also facilitates unloading.

[0105] Pallet unloading process: When the transmission mechanism drives the chain 4 to move, the support rod 2 pushes the pallet pull rod 6, causing the pallet assembly 1 to move to the unloading position along with the chain 4; the pallet is pulled out by the operating rod 21, and the tungsten ore powder is poured into the silo.

[0106] Chain drive load process: At low speeds (1 m / min), the drive sprocket 9 transmits torque to the drive shaft 11 via a key, driving the chain 4 to move smoothly. Reinforcing ribs resist tensile deformation of the chain 4, ensuring a pitch error of <0.1 mm under load. During use, the chain 4 needs to be manually lubricated periodically, and the drying chamber should be kept free of debris.

[0107] Gravity adaptive principle: The pallet pull rod 6 is hinged to the support rod 2, and the pallet's center of gravity is located below the hinge point, automatically balancing the pallet's posture using gravitational torque. Advantages: Eliminates the need for manual leveling, pallet levelness error <0.5°, and reduces material accumulation.

[0108] Split-type chamber thermal management principle: Vortex fan 18 draws hot and humid air out of the chamber, forming negative pressure to promote drying, so that the temperature gradient inside the chamber is ≤2℃ / m, and the drying uniformity is greatly improved.

[0109] Industrial Value: This system addresses three major pain points in tungsten ore powder drying: continuity, stability, and maintainability. It significantly increases single-line capacity while substantially reducing energy consumption. This invention is applicable to industries such as cemented carbide and metallurgical powders, promoting the automation upgrade of high-value-added mineral processing. The global annual tungsten ore processing volume exceeds 80,000 tons, and the drying equipment market size reaches US$120 million. This technology can replace imported equipment, significantly reducing costs compared to imported equipment.

[0110] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tray transmission system for microwave drying, comprising a drying chamber, a tray assembly, and a transmission mechanism, characterized in that: The tray assembly is connected to the transmission mechanism via a gravity-adaptive hook structure. The gravity-adaptive hook structure includes: The support rod is vertically fixed to the outer chain plate of the transmission mechanism via a connecting plate; The pallet pull rod has one end hinged to the pallet assembly via a pull ring, and the other end rotatably connected to the support rod via a connecting ring.

2. The microwave drying tray transmission system according to claim 1, characterized in that: The pallet assembly includes a pallet frame and a pallet inserted into the pallet frame. The pallet is equipped with an operating lever for easy manual operation. The pallet frame is connected to... The pull ring is hinged to the tray pull rod.

3. The microwave drying tray transmission system according to claim 1, characterized in that: The transmission mechanism is a roller chain drive structure, including a driving sprocket, a driven sprocket, and a chain wound around the driving sprocket and the driven sprocket. The chain in question has a driving sprocket mounted on the drying chamber via a driving shaft, and a driven sprocket mounted on the drying chamber via a driven shaft. On the body, the drive shaft and driven shaft are respectively mounted on the drying chamber via bearings.

4. The microwave drying tray transmission system according to claim 3, characterized in that: The drying chamber adopts a split structure. The structure includes an upper housing and a lower housing. The upper housing is equipped with an upper half bearing seat, and the lower housing is equipped with a lower half bearing seat. After the lower housing is snapped together, the upper and lower bearing housings are fixed together with bolts to form a complete bearing housing. The bearing housing corresponds one-to-one with the drive shaft and driven shaft, and the drive shaft and driven shaft are rotatably connected to the drying chamber through corresponding bearing housings. catch.

5. The microwave drying tray transmission system according to claim 3, characterized in that: The outer chain plate of the chain is provided with reinforcing ribs and through holes with a diameter of 31mm, which are used for connecting plates.

6. The microwave drying tray transmission system according to claim 4, characterized in that: The side wall of the lower or upper housing is integrated with a vortex fan, which is used to exhaust the hot and humid gas inside the housing.

7. The microwave drying tray transmission system according to claim 1, characterized in that: The support rod is connected to the connecting plate via nuts and washers, and the connecting plate is connected to the outer chain plate of the chain; the drive sprocket, the driven sprocket, and the driven sprocket are connected to the connecting plate. Two sets of sprockets and chains are spaced apart along the width of the drying chamber, and a gravity-adaptive hook structure is connected to each of the two chains. Two sets are provided, and the two sets of gravity-adaptive hook structures share the same support rod. The width of the tray assembly in the drying chamber is... It is located between two chains and connected to the two chains through two sets of gravity-adaptive hook structures.

8. The microwave drying tray transmission system according to claim 3, characterized in that: The driving sprocket and the driven sprocket are respectively connected to the driving shaft and the driven shaft by keys.

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