Grain drier grain discharging mechanism with anti-breaking structure

Abstract

This invention relates to the field of grain dryer technology, specifically to a grain dryer discharge mechanism with an anti-breakage structure. The mechanism includes a main body with a discharge chamber at its bottom, connected to a grain receiving hopper at the bottom; a frame unit located within the discharge chamber, comprising a first frame slidably connected to the inner wall of the discharge chamber, and a second frame slidably nested in the middle of the first frame; both the first and second frames have connecting grooves on their outer walls, with the two sets of grooves facing opposite directions; a partition plate fixed inside the discharge chamber above the frame unit, with several discharge ports extending through its top; and a drive unit located within the discharge chamber. This invention enables low-breakage discharge throughout the entire grain dryer process, single-drive multi-mode controllable discharge, and also helps to break up knots and prevent damage. The purely mechanical structure ensures stable operation and is suitable for drying various grains.

Description

Technical Field

[0001] This invention relates to the field of grain dryer technology, and in particular to a grain dryer discharge mechanism with an anti-breakage structure. Background Technology

[0002] Grain drying is a core component for ensuring food security and reducing post-harvest losses. Tower-type circulating grain dryers, due to their high drying efficiency and wide applicability to various grain types, have become the mainstream equipment for large-scale grain drying in my country. The grain discharge mechanism, as the core discharge component of the dryer, directly determines the breakage rate, commercial grade, and processing quality of the dried grain.

[0003] Currently, the grain discharge stage is the core source of increased grain breakage rate in the entire drying process. Existing mainstream impeller and auger-type grain discharge mechanisms generally suffer from four major breakage defects: First, the fixed gap between the rigid impeller and the shell easily causes compression and shearing breakage of the grain, and high-speed rotation exacerbates rigid impact damage to the grains; second, the grains, whose brittleness has significantly increased after drying, fall vertically from a high position, directly impacting the rigid grain discharge components, causing grain breakage and rice grain bursting; third, the grain discharge port is prone to arching and bridging, which can cause sudden impact breakage upon collapse, while also leading to uneven grain discharge and grain layer deviation; fourth, the sharp angles of the flow channel and rigid friction can easily cause scratches on the grain surface and damage to the germ, seriously affecting the germination rate of seed grains. Summary of the Invention

[0004] The present invention provides a grain discharge mechanism for a grain dryer with an anti-breakage structure, in order to solve the problem mentioned in the background art that the existing grain discharge mechanism is prone to structural defects, causing the grain to be subjected to compression and shearing, high-speed impact, arching and collapse impact and hard friction, which in turn leads to grain breakage, rice bursting, damage to the skin and germ, and uneven grain discharge.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a grain dryer discharge mechanism with an anti-breakage structure, including a main body, a discharge chamber provided at the bottom of the main body, and a grain receiving hopper connected to the bottom of the discharge chamber; A frame unit is provided inside the grain discharge chamber. The frame unit includes a frame one that is slidably connected to the inner wall of the grain discharge chamber, and a frame two that is slidably nested in the middle of the frame one. The outer walls of the frame one and the frame two are provided with mating grooves, and the two sets of mating grooves face opposite directions. A partition plate is fixed inside the grain discharge chamber and located above the frame unit. Several grain discharge ports are opened through the top of the partition plate. The drive unit is located inside the grain discharge chamber. The drive unit includes a drive motor, a drive component one, a drive component two, and several lifting components. The lifting components are installed in two groups at the docking grooves of frame one and frame two. The drive component one and drive component two are respectively connected to the corresponding lifting components for driving frame one and frame two to alternately raise and lower to discharge grain.

[0006] The present invention is further configured such that a chain disk is provided at the output end of the drive motor, and the chain disk is connected in series with drive component one and drive component two via a chain. Each lifting component includes a turntable one and a turntable two. The turntable one is rotatably installed on the outer wall of the corresponding frame one or frame two, and the turntable two is rotatably installed in the inner cavity of the corresponding frame one or frame two. The turntable one and the turntable two are coaxially fixedly connected by a linkage shaft passing through the side wall of the corresponding frame.

[0007] The present invention is further configured such that the driving component one includes a rotatably mounted driving rod one, one end of the driving rod one being connected to a lifting component corresponding to the frame two, and the other end of the driving rod one being coaxially fixed with a limiting ring one. The outer circumferential wall of the limiting ring one is provided with a plurality of slots one, and a locking tooth one is hinged in the slot one. A sleeve one is coaxially sleeved on the outside of the limiting ring one, and a chain disk two is coaxially fixed on the outer wall of the sleeve one. The inner wall of the sleeve one is provided with a mating tooth one that meshes with the locking tooth one, forming a first one-way locking tooth mechanism.

[0008] The present invention is further configured such that the driving component two includes a rotatably mounted driving rod two, one end of the driving rod two being connected to a lifting component corresponding to the frame one, a limiting ring two being coaxially fixed to the outer wall of the driving rod two, a plurality of slots two being arranged in a row on the outer circumference of the limiting ring two, a locking tooth two being hinged in the slot two, a sleeve two being coaxially sleeved on the outside of the limiting ring two, a chain disk three being coaxially fixed to the outer wall of the sleeve two, and a circumferential array of mating teeth two being arranged on the inner wall of the sleeve two to mesh with the locking teeth two, forming a second one-way locking tooth mechanism.

[0009] The invention is further configured such that the top of both frame one and frame two are provided with a grain scraping slope, and the interior of both frame one and frame two is provided with a fixing frame below the partition plate. The top of the fixing frame is provided with a top rod corresponding to each grain discharge port. The top rod includes a rod body fixedly connected to the fixing frame. The top of the rod body is provided with a conical top head. A movable plate is slidably installed inside the conical top head. The side of the movable plate near the grain discharge port is a slope. The conical top head is also provided with an elastic element whose two ends are respectively connected to the movable plate and the inner wall of the conical top head.

[0010] The present invention is further configured such that a support frame is provided inside the grain discharge chamber below the frame unit, and the support frame is provided with an elastic support rod whose top end is connected to a fixed frame, and a support rod whose top end is connected to a partition plate.

[0011] The present invention is further configured such that an annular drive groove is provided on one side of the turntable corresponding to the docking groove, a drive bolt is slidably connected inside the annular drive groove, a slot is provided on one side of the annular drive groove, a magnetic component is provided inside the slot, and an installation port is provided inside the annular drive groove near the slot, and a locking block is slidably installed inside the installation port.

[0012] The present invention is further configured such that an annular groove is provided on the side of the turntable two away from the turntable one, a connecting bolt two is slidably installed inside the annular groove, and a connecting rod is rotatably connected to one end of the connecting bolt two located outside the annular groove, and the top end of the connecting rod is fixedly connected to the fixing frame of the corresponding frame.

[0013] The present invention is further configured such that the driving component one includes a fixed rod fixedly connected to the inner wall of the grain discharge chamber, the driving rod one is rotatably installed in the inner cavity of the fixed rod, the limiting ring one has a sliding groove communicating with the slot one on the side near the driving rod one, the outer wall of the locking tooth one has a locking slot corresponding to the sliding groove, a collar is coaxially slidably installed at the end of the driving rod one near the limiting ring one, the outer wall of the collar is provided with a locking block two corresponding to the sliding groove, and a pushing component is fixedly installed in the inner cavity of the fixed rod near the collar, the output end of the pushing component is fixedly connected to the collar, and is used to lock the transmission state of the locking tooth one.

[0014] The beneficial effects of the grain discharge mechanism of a grain dryer with an anti-breakage structure of the present invention are as follows: 1. Achieve low-breakage grain discharge throughout the entire process, fundamentally solving the problems of grain breakage and cracking. The nested frame 1 and frame 2 are driven by a drive unit to alternately raise and lower the grain discharge, replacing the traditional rigid rotary grain discharge structure and eliminating compression and shearing breakage; the rotating disk 1 and rotating disk 2 of the lifting component are coaxially fixed, so that the lifting of the frame and the opening and closing of the grain discharge port of the top rod are completely synchronized. With the top rod with movable plate and elastic element 1, it avoids grain jamming and crushing, while ensuring the integrity of the germ of the seed grain and the germination rate.

[0015] 2. Achieve single-drive, multi-mode controllable grain discharge, solving the problems of grain layer deviation and uneven drying. The drive motor connects drive component one and drive component two in series via a chain. The two sets of unidirectional toothed mechanisms with opposite transmission directions can drive the corresponding frame to discharge grain independently by rotating the motor in both directions. This flexibly matches the drying progress of different areas of the drying chamber, ensuring that the grain layer in the entire cross section descends horizontally and synchronously. At the same time, the equipment has a very simple structure and a low failure rate.

[0016] 3. Achieves zero secondary damage and prevents grain arching, adaptable to harsh agricultural machinery operating conditions. The turntable is guided by the channel trajectory, causing the high-position frame to sway slightly to break up grain arching. There is no rotational impact or high-frequency vibration, so it will not cause secondary damage to the grains. The entire mechanism is a purely mechanical structure, without the need for complex electronic control components. With the help of elastic support rods, it can automatically reset and seal the grain discharge port when power is cut off, eliminating the risk of grain overflow and blockage. It is stable in operation and easy to maintain. Attached Figure Description

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, a detailed description is provided below in conjunction with the accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Figure 1 This is a three-dimensional structural diagram of a grain dryer discharge mechanism with an anti-breakage structure according to the present invention; Figure 2 This is a partially enlarged view of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention; Figure 3 This is a cross-sectional view of a grain discharge mechanism for a grain dryer with an anti-breakage structure according to the present invention. Figure 4 This is a partial view of the internal structure of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention; Figure 5 This is a separate view of frame one and frame two of a grain dryer discharge mechanism with an anti-breakage structure according to the present invention. Figure 6 This is a cross-sectional view of the top rod of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention; Figure 7 This is a detailed structural diagram of the partition plate, bottom plate, and drive unit of a grain dryer discharge mechanism with an anti-breakage structure according to the present invention. Figure 8This is a partial view of the drive unit of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention; Figure 9 This is a cross-sectional view of drive component one and drive component two of a grain dryer discharge mechanism with an anti-breakage structure according to the present invention. Figure 10 This is a partial view of the drive assembly of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention; Figure 11 This is a separation diagram of the drive assembly and lifting assembly of the grain discharge mechanism of a grain dryer with an anti-breakage structure according to the present invention.

[0020] The diagram is labeled as follows: 1. Main body; 2. Grain discharge chamber; 21. Grain receiving hopper; 22. Frame unit; 221. Frame one; 222. Connecting curved groove; 223. Grain scraping inclined surface; 224. Frame two; 225. Fixing frame; 226. Top rod; 2261. Rod body; 2262. Conical top head; 2263. Movable plate; 2264. Elastic element one; 23. Divider plate; 231. Grain discharge port; 24. Drive unit; 241. Drive motor; 242. Chain disc one; 243. Drive assembly one; 2431. Fixing rod; 2432. Drive rod one; 24321. Limiting ring one; 24322. Groove one; 24323. Slide groove; 2433. Sleeve one; 24324. Clamping tooth one; 24325. Clamping opening; 2434. Chain disc two; 2435. Connecting Gear 1; 2436. Collar; 24361. Locking Block 2; 2437. Pushing Assembly; 244. Drive Assembly 2; 2441. Drive Rod 2; 2442. Limiting Ring 2; 2443. Groove 2; 2444. Locking Gear 2; 2445. Sleeve 2; 2446. Chain Disc 3; 2447. Connecting Gear 2; 245. Lifting Assembly; 2451. Turntable 1; 24511. Annular Drive Groove; 24512. Locking Slot; 24513. Mounting Port; 24514. Magnetic Component; 2452. Locking Block 1; 2453. Drive Bolt 1; 2454. Turntable 2; 2455. Annular Curved Groove; 2456. Connecting Bolt 2; 2457. Connecting Rod; 25. Support Frame; 251. Elastic Support Rod; 252. Support Rod. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two elements or the interaction between two elements.

[0023] Please see Figure 1 - Figure 11 A grain dryer discharge mechanism with an anti-breakage structure includes a main body 1, a discharge chamber 2 at the bottom of the main body 1, and a grain receiving hopper 21 connected to the bottom of the discharge chamber 2. The frame unit 22 is disposed in the grain discharge chamber 2. The frame unit 22 includes a frame 1 221 that is slidably connected to the inner wall of the grain discharge chamber 2, and a frame 224 that is slidably nested in the middle of the frame 1 221. The outer walls of the frame 1 221 and the frame 224 are provided with mating grooves 222, and the two sets of mating grooves 222 face opposite directions. The partition plate 23 is fixed inside the grain discharge chamber 2 and located above the frame unit 22. Several grain discharge ports 231 are opened through the top of the partition plate 23. The drive unit 24 is located inside the grain discharge chamber 2. The drive unit 24 includes a drive motor 241, a drive component 1 243, a drive component 244, and several lifting components 245. The lifting components 245 are installed in two groups at the docking grooves 222 of the frame 1 221 and the frame 2 224. The drive component 1 243 and the drive component 244 are respectively connected to the corresponding lifting components 245 for driving the frame 1 221 and the frame 2 224 to alternately raise and lower the grain discharge. The output end of the drive motor 241 is provided with a chain disk 242. The chain disk 242 is connected in series with the drive assembly 243 and the drive assembly 244 via a chain. Each lifting assembly 245 includes a turntable 2451 and a turntable 2454. The turntable 2451 is rotatably mounted on the outer wall of the corresponding frame 221 or frame 224, and the turntable 2454 is rotatably mounted in the inner cavity of the corresponding frame 221 or frame 224. The turntable 2451 and the turntable 2454 are coaxially fixedly connected by a linkage shaft that passes through the side wall of the corresponding frame.

[0024] By adopting the above technical solution, the grain dryer's discharge mechanism relies on the nested sliding linkage between frame 1 221, frame 2 224 and the docking curved groove 222. The chain disk 1 242 forms a precise power transmission match with drive component 1 243 and drive component 2 244. Turntable 1 2451 and turntable 2 2454 achieve rigid coaxial linkage. The lifting component 245 and the docking curved groove 222 have good structural compatibility. The parameters of each key component are reasonable, the overall transmission is smooth, and the alternating grain discharge action is coordinated and stable.

[0025] The drive assembly 243 includes a rotatably mounted drive rod 2432. One end of the drive rod 2432 is connected to the lifting assembly 245 corresponding to the frame 224. The other end of the drive rod 2432 is coaxially fixed with a limit ring 24321. The outer circumference of the limit ring 24321 is provided with a number of slots 24322. The slots 24322 are hinged with teeth 24324. The outer side of the limit ring 24321 is coaxially fitted with a sleeve 2433. The outer wall of the sleeve 2433 is coaxially fixed with a chain disc 2434. The inner wall of the sleeve 2433 is provided with mating teeth 2435 that mesh with the teeth 24324, forming a first one-way tooth clamping mechanism. The drive assembly 243 also includes a fixed rod 2431 fixedly connected to the inner wall of the discharge chamber 2. The drive rod 2432 is rotatably installed in the inner cavity of the fixed rod 2431. The limiting ring 24321 is provided with a sliding groove 24323 communicating with the slot 24322 on the side near the drive rod 2432. The outer wall of the locking tooth 24324 is provided with a locking slot 24325 corresponding to the sliding groove 24323. A collar 2436 is slidably installed coaxially at one end of the drive rod 2432 near the limiting ring 24321. A locking block 24361 is provided on the outer wall of the collar 2436 corresponding to the sliding groove 24323. A push assembly 2437 is fixedly installed in the inner cavity of the fixed rod 2431 near the collar 2436. The output end of the push assembly 2437 is fixedly connected to the collar 2436 to lock the transmission state of the locking tooth 24324.

[0026] By adopting the above technical solution, the drive component 243 forms a precise unidirectional transmission cooperation with the limit ring 24321, the locking tooth 24324, the sleeve 2433, and the docking tooth 2435. The collar 2436, the locking block 24361, and the push component 2437 work together to achieve reliable locking. The parameters of each key component are matched, the transmission is smooth, the locking is firm, and the coordinated efforts ensure precise and efficient directional transmission control.

[0027] Drive assembly 244 includes a rotatably mounted drive rod 2441. One end of drive rod 2441 is connected to the lifting assembly 245 corresponding to frame 221. A limit ring 2442 is coaxially fixed to the outer wall of drive rod 2441. A number of slots 2443 are arranged in a row on the outer circumference of the limit ring 2442. A locking tooth 2444 is hinged in the slot 2443. A sleeve 2445 is coaxially sleeved on the outside of the limit ring 2442. A chain disk 2446 is coaxially fixed to the outer wall of sleeve 2445. A mating tooth 2447 corresponding to the locking tooth 2444 is arranged in a circumferential array on the inner wall of sleeve 2445, forming a second one-way locking tooth mechanism.

[0028] By adopting the above technical solution, the drive component 244 relies on the limiting ring 2442, the locking tooth 2444, the sleeve 2445, and the mating tooth 2447 to form a precise one-way meshing structure. The chain disc 2446 matches the transmission speed and forms a reverse rotation cooperation with the drive rod 2432. The assembly and meshing of each component have a high degree of fit, the transmission operation is stable and reliable, and it can accurately complete the directional transmission control of the frame 221.

[0029] Both frame 1 221 and frame 2 224 are provided with a grain scraping slope 223 at the top. Both frame 1 221 and frame 2 224 are provided with a fixing frame 225 located below the partition plate 23. The top of the fixing frame 225 is provided with a top rod 226 corresponding to the position of each grain discharge port 231. The top rod 226 includes a rod body 2261 fixedly connected to the fixing frame 225. The top of the rod body 2261 is provided with a conical top head 2262. A movable plate 2263 is slidably installed inside the conical top head 2262. The side of the movable plate 2263 near the grain discharge port 231 is a slope. The conical top head 2262 is also provided with an elastic element 2264 whose two ends are respectively connected to the movable plate 2263 and the inner wall of the conical top head 2262. Inside the grain discharge chamber 2, below the frame unit 22, there is a support frame 25. The support frame 25 has an elastic support rod 251 whose top end is connected to the fixed frame 225, and a support rod 252 whose top end is connected to the partition plate 23.

[0030] By adopting the above technical solution, the frame 1 221, the frame 2 224 and the grain scraping inclined surface 223 cooperate with each other and their lifting and lowering operations are coordinated and consistent; the rod 2261, the conical top 2262, the movable plate 2263 and the elastic element 1 2264 form a linkage structure to achieve stable blocking and flexible buffering; the elastic support rod 251 and the support rod 252 are precisely assembled with the fixed frame 225 and the partition plate 23, and the various structures cooperate and adapt to each other to stably achieve non-destructive grain discharge operation.

[0031] Turntable 1 2451 has an annular drive groove 24511 on one side corresponding to the docking groove 222. A drive bolt 2453 is slidably connected inside the annular drive groove 24511. A slot 24512 is provided on one side of the annular drive groove 24511. A magnetic component 24514 is provided inside the slot 24512. An installation port 24513 is provided inside the annular drive groove 24511 near the slot 24512. A locking block 2452 is slidably installed inside the installation port 24513. Turntable 2 2454 has an annular groove 2455 on the side away from turntable 1 2451. A docking bolt 2456 is slidably installed inside the annular groove 2455. A connecting rod 2457 is rotatably connected to one end of the docking bolt 2456 located outside the annular groove 2455. The top end of the connecting rod 2457 is fixedly connected to the fixing bracket 225 of the corresponding frame.

[0032] By adopting the above technical solution, turntable 1 2451 forms a stable drive and limiting structure with the help of the annular drive groove 24511, drive bolt 1 2453, magnetic component 24514 and locking block 1 2452. Turntable 2 2454 completes precise linkage transmission through the annular curved groove 2455, docking bolt 2 2456 and connecting rod 2457. The synchronous rotation of the two has high precision, and the actions of each component are connected in an orderly manner, which can smoothly achieve the coordinated operation effect of trajectory guidance, automatic limiting and precise reset.

[0033] Working principle and usage process of this invention: When the mechanism enters standby mode, both frame 1 221 and frame 2 224 are at the lower stop position inside the grain discharge chamber 2 at the bottom of the main body 1. The outer wall of frame 1 221 is in contact with the inner wall of the grain discharge chamber 2, and frame 2 224 is slidably nested in the middle gap of frame 1 221. The grain receiving hopper 21 connected to the bottom of the grain discharge chamber 2 is in an empty and waiting state. The partition plate 23 fixed inside the grain discharge chamber 2 and above the frame unit 22 is stably supported by the support rod 252 on the support frame 25. The elastic support on the support frame 25 When rod 251 is in its naturally extended state, it pushes upward against the fixing frame 225 inside the corresponding frame, so that the top rod 226 at the top of the fixing frame 225 is fully inserted into the grain discharge port 231 of the partition plate 23; the rod body 2261 of the top rod 226 is fixedly connected to the fixing frame 225, and the conical top head 2262 at the top of the rod body 2261 completely blocks the grain discharge port 231, blocking the grain falling path, and the movable plate 2263 inside the conical top head 2262 is in an extended state under the push of the elastic element 2264.

[0034] The drive motor 241 of the drive unit 24 is in the stopped state. The fixing rod 2431 of the drive assembly 243 is fixedly connected to the inner wall of the grain discharge chamber 2. The drive rod 2432, which is rotatably installed inside the fixing rod 2431, is in the zero position. The locking tooth 24324, which is hinged in the slot 24322 on the limiting ring 24321 at the end of the drive rod 2432, is in the naturally retracted state and does not mesh with the mating tooth 2435 inside the sleeve 2433. The drive rod 2441, which is rotatably installed inside the drive assembly 244, is synchronously in the zero position. The locking tooth 24324, which is hinged in the slot 2443 on the limiting ring 2442 on the outer wall of the drive rod 2441, is in the zero position. 44 and the mating teeth 2447 inside the sleeve 2445 are not engaged, and the transmission directions of the second locking teeth 2444 and the first locking teeth 24324 are completely opposite; the lifting components 245, which are installed in two groups in pairs at the mating grooves 222 of the frame 1 and the frame 224, are all in the initial zero position. The magnetic component 24514 in the side groove 24512 of the annular drive groove 24511 on the turntable 1 holds the first driving bolt 2453 in the groove 24512. The second mating bolt 2456 in the annular groove 2455 on the turntable 2454 is at the top of the annular groove 2455, which is ready for the entire process of subsequent operations.

[0035] Independent grain discharge in the central area of ​​the drying chamber is initiated to address the high wind resistance and slow drying speed in the central area. The drive motor 241 rotates clockwise. The chain disc 242 at the output of the drive motor 241 drives the chain disc 2434 outside the sleeve 2433 on the drive assembly 243 via a chain. The chain disc 2434 drives the sleeve 2433 to rotate synchronously. The mating teeth 2435 inside the sleeve 2433 engage with the retaining teeth 24324, pushing and pushing, thereby driving the drive rod 2432 to rotate synchronously. Since the block on 2436 is not in the chute 24323, it is unaffected. At this time, because the transmission direction of the second tooth 2444 is opposite to that of the first tooth 24324, the sleeve 2445 of the drive component 244 rotates idly with the chain disk 3 2446 without power output. This allows the single motor to rotate clockwise and drive the frame 224 to operate, precisely controlling the grain discharge rhythm in the central area of ​​the drying chamber. This avoids grain layer deviation caused by inconsistent drying progress between the edge and the central area, and eliminates the risk of breakage caused by local over-drying leading to a surge in grain brittleness.

[0036] The frame lifting and the grain discharge port 231 are opened synchronously. When the drive rod 1 2432 rotates, it drives the multiple sets of lifting components 245 installed on the frame 224 to rotate synchronously. The turntable 1 2451 of the lifting component 245 rotates synchronously with the drive rod 1 2432. The drive bolt 1 2453 fixed in the slot 24512 rotates with the turntable 1 2451 and slides along the docking groove 222 on the outer wall of the frame 224. Guided by the inclined surface of the docking groove 222, the frame 224 is smoothly lifted upward. At the same time as the turntable 1 2451 rotates, the coaxially fixed turntable 2454 is driven to rotate synchronously through the linkage shaft penetrating the side wall of the frame 224. The annular groove 2455 on the turntable 2454 rotates synchronously. This causes the connecting bolt 2456 inside the annular curved groove 2455 to move from the top to the bottom of the annular curved groove 2455. Through the connecting rod 2457 hinged at the end of the connecting bolt 2456, the fixed frame 225 is pulled down, compressing the elastic support rod 251 on the support frame 25. This causes all the top rods 226 on the fixed frame 225 to move down synchronously, and the conical top head 2262 completely disengages from the grain discharge port 231. This achieves synchronous opening of the frame lifting and the grain discharge port 231, with no misalignment or time delay, completely avoiding the problem of grain jamming and crushing when the grain discharge port 231 is not fully open. At the same time, the grain discharge port 231 on the partition plate 23 adopts a large-diameter design, with a diameter much larger than that of conventional grain particles, eliminating the risk of grain jamming and material blockage from the source.

[0037] When drive bolt 2453 slides along the docking groove 222 to the top, and frame 224 is lifted to the upper stop of the grain discharge, drive bolt 2453 moves to the tail end of the docking groove 222. Guided by the arc of the docking groove 222, drive bolt 2453 disengages from the slot 24512 and enters the annular drive groove 24511 of turntable 2451. Turntable 2451 continues to rotate, and drive bolt 2453 slides along the wavy curve in the annular drive groove 24511, causing frame 224, which is in a high position, to make small-amplitude continuous movements. The up-and-down shaking creates a slight, continuous disturbance to the grain layer above the frame, breaking the static balance of the grain layer arching and completely avoiding sudden impact breakage caused by arching and collapse of the grain discharge port 231. At the same time, there are no actions that easily damage the grains, such as rotation and high-frequency vibration, thus achieving the dual effect of preventing arching and breaking. At this time, the grain falls steadily from the fully opened grain discharge port 231 by gravity, and falls into the grain receiving hopper 21 at the bottom through the inner cavity of the second frame 224. There is no rigid compression, shearing, or high-speed impact throughout the process, and the single-stage grain breakage rate is far below the national standard limit.

[0038] Independent grain discharge switching at the edge of the drying chamber is designed for conditions with low wind resistance and high drying speed at the edge of the drying chamber. The drive motor 241 rotates counter-clockwise, and the chain disc 242 at the output of the drive motor 241 drives the chain disc 2434 to rotate via a chain. The chain disc 2434 drives the sleeve 2433 to rotate synchronously. The mating teeth 2435 and the locking teeth 24324 inside the sleeve 2433 no longer engage, causing the sleeve 2433 to idle. However, the chain disc 2434 on the sleeve 2433 drives the chain disc 2446 outside the sleeve 2445 via a chain, causing the sleeve 2445 to rotate synchronously. The mating teeth 2435 inside the sleeve 2433 no longer engage with the locking teeth 24324, causing the sleeve 2433 to rotate freely. The second tooth 2447 engages with the second tooth 2444 to push and drive the second drive rod 2441 to rotate synchronously. The synchronous drive component 243 is in an idle state due to the opposite transmission direction of the first tooth 24324, and has no power output. This allows the single motor to rotate counterclockwise and drive the frame 221 to operate. It precisely controls the grain discharge rhythm in the edge area of ​​the drying chamber, complementing the grain discharge in the center area, and ensuring that the grain layer in the entire cross section of the drying chamber descends horizontally and synchronously. During the lifting and lowering of the frame 221, the scraping slope 223 on the outer wall moves up and down with the frame, continuously scraping off the grain attached to the inner wall of the grain discharge chamber 2, preventing the grain from accumulating and becoming moldy in the long term, while ensuring that the frame slides smoothly without jamming.

[0039] Before the drive frame 221 starts working, the transmission lock can be completed by the push assembly 2437. The push assembly 2437 installed inside the fixed rod 2431 pushes the collar 2436 to slide axially along the drive rod 2432. The second locking block 24361 on the outer wall of the collar 2436 slides along the slide groove 24323 on the limiting ring 24321 and locks into the locking slot 24325 on the outer wall of the locking tooth 24324, locking the swing of the locking tooth 24324. This causes the locking tooth 24324 to lock with the mating tooth 2435, so that when the sleeve 2433 rotates, the drive rod 2432 rotates synchronously with the drive rod 2441, thereby making the frame 221 and the frame 224 operate synchronously and realize the overall grain discharge.

[0040] The single-frame reset and synchronous sealing operation of the grain discharge port 231: After the grain discharge in a single area is completed, the drive motor 241 stops rotating in the corresponding direction. The elastic support rod 251 automatically rebounds and extends after losing downward tension, pushing the fixing frame 225 upwards. This causes the push rod 226 to move upwards and re-insert into the grain discharge port 231 to complete the sealing. Because the conical top head 2262 is conical, narrow at the top and wide at the bottom, it first pushes the grain in the grain discharge port 231 through its top, preventing the grain in the discharge port 231 from being crushed during the pushing process. Even if residual grain gets stuck inside the discharge port 231 as the conical top 2262 continues to rise, the movable plate 2263 helps to squeeze the residual grain, leaving space for it and preventing it from being crushed. When the grain is discharged next time, the residual grain will be gently pushed out by the buffering effect of the elastic element 2264, without rigid impact or grain crushing, achieving residue-free grain cleaning and preventing long-term accumulation and mold growth. It is also suitable for drying and changing batches of various grains without the need to disassemble the machine for grain cleaning.

[0041] As the fixed frame 225 moves upward, the connecting rod 2457 and the second docking bolt 2456 drive the second turntable 2454 to rotate in the opposite direction. The linkage shaft drives the first turntable 2451 to rotate in the same direction. When the first drive bolt 2453 moves along the annular drive groove 24511 to push the frame unit 22 to shake, the first locking block 2452 in the first turntable 2451 does not affect the passage through its inclined surface on one side. When it rotates in the opposite direction, it blocks the first drive bolt 2453 through its vertical surface on one side, so that it can go out along the docking curved groove 222. At the same time, it is guided by the docking curved groove 222 to re-enter the locking slot 24512. The magnetic component 24514 attracts and fixes the first drive bolt 2453. The frame smoothly falls back to the lower stop point with the rotation of the first turntable 2451, completing the whole process reset. No manual intervention is required throughout the process, and the action is smooth and without jamming.

[0042] When a sudden power outage or motor failure occurs during operation, the drive motor 241 loses its power output, and the one-way locking mechanism of drive component 1 243 and drive component 2 244 loses its meshing locking force. The elastic support rod 251 on the support frame 25 instantly rebounds and extends, pushing the fixed frame 225 upward, and driving the push rod 226 to move upward in sync, quickly sealing the grain discharge port 231, eliminating the risk of grain overflow, blockage, and equipment damage caused by the continuous falling of grain after the power outage. At the same time, the fixed frame 225 drives the turntable 2454 and turntable 1 2451 to rotate in the opposite direction through the connecting rod 2457, driving the corresponding frame to fall smoothly back to the lower stop point, completing the automatic reset of the entire mechanism. There is no need for manual tower cleaning or manual reset, which greatly improves the safety of equipment operation and emergency handling capabilities.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grain discharge mechanism for a grain dryer with an anti-breakage structure, characterized in that, include: The main body (1) has a grain discharge chamber (2) at the bottom and a grain receiving hopper (21) at the bottom of the grain discharge chamber (2). The frame unit (22) is located inside the grain discharge chamber (2). The frame unit (22) includes a frame one (221) that is slidably connected to the inner wall of the grain discharge chamber (2), and a frame two (224) that is slidably nested in the middle of the frame one (221). The outer walls of the frame one (221) and the frame two (224) are provided with connecting grooves (222), and the two sets of connecting grooves (222) face opposite directions. A partition plate (23) is fixed inside the grain discharge chamber (2) and located above the frame unit (22). The top of the partition plate (23) is provided with several grain discharge ports (231). The drive unit (24) is located in the grain discharge chamber (2). The drive unit (24) includes a drive motor (241), a drive component one (243), a drive component two (244), and a number of lifting components (245). The lifting components (245) are installed in two groups at the docking grooves (222) of the frame one (221) and the frame two (224). The drive component one (243) and the drive component two (244) are respectively connected to the corresponding lifting components (245) for driving the frame one (221) and the frame two (224) to alternately lift and lower the grain discharge.

2. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 1, characterized in that: The output end of the drive motor (241) is provided with a chain disk one (242). The chain disk one (242) is connected in series with the drive component one (243) and the drive component two (244) via a chain. Each lifting component (245) includes a turntable one (2451) and a turntable two (2454). The turntable one (2451) is rotatably installed on the outer wall of the corresponding frame one (221) or frame two (224). The turntable two (2454) is rotatably installed in the inner cavity of the corresponding frame one (221) or frame two (224). The turntable one (2451) and the turntable two (2454) are coaxially fixedly connected by a linkage shaft that passes through the side wall of the corresponding frame.

3. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 1, characterized in that: The drive assembly 1 (243) includes a drive rod 1 (2432) rotatably mounted. One end of the drive rod 1 (2432) is connected to the lifting assembly (245) corresponding to the frame 2 (224) in a transmission connection. The other end of the drive rod 1 (2432) is coaxially fixed with a limit ring 1 (24321). The outer circumference of the limit ring 1 (24321) is provided with a plurality of slots 1 (24322). The slots 1 (24322) are hinged with a locking tooth 1 (24324). The outer side of the limit ring 1 (24321) is coaxially fitted with a sleeve 1 (2433). The outer wall of the sleeve 1 (2433) is coaxially fixed with a chain disc 2 (2434). The inner wall of the sleeve 1 (2433) is provided with a mating tooth 1 (2435) that meshes with the locking tooth 1 (24324), forming a first one-way locking tooth mechanism.

4. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 1, characterized in that: The second drive assembly (244) includes a rotatably mounted drive rod (2441). One end of the drive rod (2441) is connected to the lifting assembly (245) corresponding to the frame (221). The outer wall of the drive rod (2441) is coaxially fixed with a limiting ring (2442). The outer circumference of the limiting ring (2442) is provided with a number of slots (2443). The slots (2443) are hinged with teeth (2444). The outer side of the limiting ring (2442) is coaxially fitted with a sleeve (2445). The outer wall of the sleeve (2445) is coaxially fixed with a chain disk (2446). The inner wall of the sleeve (2445) is circumferentially arrayed with mating teeth (2447) that mesh with the teeth (2444), forming a second one-way tooth mechanism.

5. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 1, characterized in that: Both frame one (221) and frame two (224) are provided with a grain scraping slope (223) at the top. Both frame one (221) and frame two (224) are provided with a fixed frame (225) located below the partition plate (23) inside. The top of the fixed frame (225) is provided with a top rod (226) corresponding to each grain discharge port (231). The top rod (226) includes a rod body (2261) fixedly connected to the fixed frame (225). The top of the rod body (2261) is provided with a conical top head (2262). A movable plate (2263) is slidably installed inside the conical top head (2262). The side of the movable plate (2263) near the grain discharge port (231) is a slope. The conical top head (2262) is also provided with an elastic element (2264) whose two ends are respectively connected to the movable plate (2263) and the inner wall of the conical top head (2262).

6. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 5, characterized in that: Inside the grain discharge chamber (2), below the frame unit (22), there is a support frame (25). The support frame (25) has an elastic support rod (251) connected to the fixed frame (225) at its top end, and a support rod (252) connected to the partition plate (23) at its top end.

7. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 2, characterized in that: The turntable (2451) has an annular drive groove (24511) on one side corresponding to the docking groove (222). A drive bolt (2453) is slidably connected inside the annular drive groove (24511). A slot (24512) is provided on one side of the annular drive groove (24511). A magnetic component (24514) is provided inside the slot (24512). An installation port (24513) is provided inside the annular drive groove (24511) near the slot (24512). A locking block (2452) is slidably installed inside the installation port (24513).

8. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 2, characterized in that: The turntable 2 (2454) has an annular groove (2455) on the side away from the turntable 1 (2451). A connecting bolt 2 (2456) is slidably installed inside the annular groove (2455). A connecting rod (2457) is rotatably connected to one end of the connecting bolt 2 (2456) located outside the annular groove (2455). The top end of the connecting rod (2457) is fixedly connected to the fixing frame (225) of the corresponding frame.

9. The grain discharge mechanism of a grain dryer with an anti-breakage structure according to claim 3, characterized in that: The drive assembly (243) further includes a fixed rod (2431) fixedly connected to the inner wall of the discharge chamber (2). The drive rod (2432) is rotatably installed in the inner cavity of the fixed rod (2431). The limiting ring (24321) has a sliding groove (24323) communicating with the slot (24322) on the side near the drive rod (2432). The outer wall of the locking tooth (24324) has a locking slot (24325) corresponding to the position of the sliding groove (24323). A collar (2436) is slidably mounted coaxially at one end of a limiting ring (24321) near the limiting ring (24321). A locking block (24361) is provided on the outer wall of the collar (2436) at the position corresponding to the sliding groove (24323). A pushing component (2437) is fixed in the inner cavity of the fixing rod (2431) near the collar (2436). The output end of the pushing component (2437) is fixedly connected to the collar (2436) to lock the transmission state of the locking tooth (24324).

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