Seedling raising device for growing vegetables

Abstract

The present invention belongs to the technical field of vegetable seedling raising, and specifically discloses a seedling raising device for planting vegetables, which includes a sowing groove, a conical hopper, a feeding pipe, a U-shaped rod, a lifting sleeve, a single-seed dropping mechanism, a dimple pressing linkage mechanism, an upper dimple pressing member, and a seed dropping linkage mechanism. The sowing groove is arranged on a bracket, the conical hopper is connected in an array and arranged on the lower side of the sowing groove, the feeding pipe is connected and arranged on the lower side of the conical hopper, the feeding pipe extends vertically downward, the U-shaped rods are arranged in an array on the installation vertical plate and are located on the lower side of the feeding pipe, the lifting sleeve is sleeved on the outer side of the feeding pipe in a liftable manner and passes through the U-shaped rod downward, the upper dimple pressing member is connected to the lower end of the lifting sleeve, the single-seed dropping mechanism is arranged on one side of the feeding pipe, and the seed dropping linkage mechanism is arranged on the upper dimple pressing member. Through the integrated design of dimple pressing and sowing, the present invention realizes multiple processes with a single device, improves the automation degree and operation speed, reduces investment, and the new sowing mechanism significantly improves the single-seed sowing accuracy and effectively overcomes the problems of missed sowing and repeated sowing.

Description

Technical Field

[0001] The invention belongs to the technical field of vegetable seedling cultivation, and in particular relates to a seedling cultivation device for planting vegetables. Background Art

[0002] The vegetable industry is a vital component of the modern agricultural economy, and the cultivation of high-quality seedlings is a key precursor to large-scale, standardized vegetable production. Seedling quality directly impacts subsequent growth, yield, and the quality of the final product. Among the many seedling production technologies, plug tray seedling cultivation has become the mainstream technology widely used in facility vegetable production because it standardizes the seedling production process, produces high-quality, strong seedlings, and significantly improves land utilization and labor productivity.

[0003] For different types of vegetable seeds, especially common spherical or nearly spherical vegetable seeds such as cabbage, Chinese cabbage, and radish, the seedling tray process typically involves a series of standardized steps. The typical process involves first evenly filling a seedling tray with multiple independent cells with seedling matrix. A conveyor system then transports the filled tray to the next station, where a seed hole, also known as a nest, is pressed into the matrix surface of each cell to a predetermined depth and shape using a hole-pressing device. A precision seeding device then precisely deposits seeds (ideally, one seed per hole) into each cell. After seeding, a thin layer of matrix or a covering material such as vermiculite is applied. Finally, subsequent processing steps include compaction and spray irrigation. However, in existing practices, the core steps of seed tray cultivation, such as hole-pressing (nesting) and precision seeding (seeding), are typically performed separately by separate, single-function automated or semi-automated equipment. This multi-station operation model presents several inherent technical drawbacks.

[0004] The combination of multiple devices and processes complicates the structure of the entire seedling production line, increasing its footprint and increasing the initial investment cost and subsequent maintenance burden. The precise transport, positioning, and synchronization coordination mechanisms required between each independent device not only increase the complexity of the control system but also easily lead to cumulative errors during process transitions. Furthermore, the cumbersome process flow limits further improvements in overall production efficiency.

[0005] In the precise seeding process, one of the widely adopted technical solutions is the seed suction method based on the pneumatic negative pressure principle. This method generates negative pressure through a vacuum generating device, uses a suction nozzle to adsorb seeds, then moves above the seedling tray, and finally releases the negative pressure or applies a positive pressure airflow to make the seeds fall into the cavities. Although this technology is relatively mature, its seeding accuracy often fails to reach the ideal state. Fluctuations in the magnitude of the negative pressure, wear or blockage of the suction nozzle may all lead to unstable suction, easily resulting in phenomena such as missed seeding (no seeds in the cavity) or重播 (multiple seeds in one cavity). Summary of the Invention

[0006] In view of the above situation, the present invention provides a seedling raising device for growing vegetables. Through an integrated design of cavity pressing and seeding, a single device can complete multiple processes, improving the degree of automation and operation speed, reducing equipment investment, maintenance costs, and equipment footprint. The new seeding mechanism significantly improves the single-seed seeding accuracy, effectively overcomes the problems of missed seeding and重播, and enhances the uniformity and quality of the seedlings.

[0007] The technical solution adopted by the present invention is as follows: The present invention provides a seedling raising device for growing vegetables, including support feet, an installation vertical plate, and a bracket. The installation vertical plate is arranged between the support feet, and the bracket is arranged at the upper end of the support feet. It further includes a seeding groove, a conical hopper, a feeding pipe, a C-shaped rod, a lifting sleeve, a single-seed dropping mechanism, a cavity pressing linkage mechanism, an upper cavity pressing member, and a seed dropping linkage mechanism. The seeding groove is arranged on the bracket, the conical hoppers are connected in an array and arranged on the lower side of the seeding groove, the feeding pipe is connected and arranged on the lower side of the conical hopper, the feeding pipe extends vertically downward, the C-shaped rods are arranged in an array on the installation vertical plate and are located on the lower side of the feeding pipe, the lifting sleeve is sleeved outside the feeding pipe in a liftable manner and penetrates through the C-shaped rod, the upper cavity pressing member is connected to the lower end of the lifting sleeve, the single-seed dropping mechanism is arranged on one side of the feeding pipe, and the seed dropping linkage mechanism is arranged on the upper cavity pressing member.

[0008] Furthermore, the cavity pressing linkage mechanism is arranged on the central C-shaped rod and includes a cylindrical cam, a roller, a forward spiral groove, and a return spiral groove. The cylindrical cam is rotatably arranged on the C-shaped rod, the forward spiral groove and the return spiral groove are connected and opened on the outer peripheral surface of the cylindrical cam, and the roller is fixedly connected to the lifting sleeve.

[0009] Furthermore, the seed dropping linkage mechanism includes a lower cavity pressing member. The lower cavity pressing member is located below the upper cavity pressing member. When the upper cavity pressing member descends, it presses against the lower cavity pressing member to form a whole for cavity pressing.

[0010] Further, the single-seed dropping mechanism includes a rotating shaft, two layers of turntables, two layers of outward-expanding arc rings, and two layers of slots. The rotating shaft is rotatably disposed through the C-shaped rod. The turntables are coaxially fixed to the rotating shaft and are located at different height positions on one side of the blanking pipe respectively. The outward-expanding arc rings are disposed at the edges of each layer of turntable. The slots are opened on one side of the blanking pipe facing the rotating shaft and are arranged at the same height as the two layers of turntables. The outward-expanding arc rings can extend into and leave the corresponding slots when the turntables rotate to block and release the seeds from falling.

[0011] Further, the cylindrical cam is coaxially connected to the upper rotating shaft, and the roller is slidably fitted in the forward spiral groove and the return spiral groove. When the cylindrical cam rotates, the lifting sleeve is driven to reciprocate up and down through the cooperation of the roller with the forward spiral groove and the return spiral groove.

[0012] Further, the seed-pointing linkage mechanism further includes a compression spring, a spring rod, and a spring seat. The spring rod penetrates through the lower part of the C-shaped rod. The spring seat is disposed at the upper end of the spring rod. The compression spring is sleeved on the spring rod and is supported between the spring seat and the C-shaped rod. The lower end of the spring rod is connected to the downward pressing socket part.

[0013] Further, it further includes a synchronous chain drive mechanism. The synchronous chain drive mechanism includes a motor, a first sprocket, a second sprocket, and a chain. The motor is disposed on the support feet. The first sprocket is connected to the output shaft of the motor. The second sprocket is coaxially disposed above the turntable. The chain is meshed with the first sprocket and all the second sprockets.

[0014] Further, it further includes a linkage rod. The linkage rod is horizontally disposed and connects all the lifting sleeves to realize that one pressing socket linkage mechanism drives all the lifting sleeves to lift and lower synchronously.

[0015] Further, the outward-expanding arc rings of the upper turntable and the outward-expanding arc rings of the lower turntable are staggered in the circumferential direction and coincide at the ends. When the upper outward-expanding arc ring just enters its corresponding slot, the lower outward-expanding arc ring is about to leave its corresponding slot. When the lower outward-expanding arc ring just enters its corresponding slot, the upper outward-expanding arc ring is about to leave its corresponding slot. The space between the two turntables can only accommodate one seed.

[0016] Further, a vertically penetrating through-hole is opened on the upper pressing socket part and is communicated with the lifting sleeve. The upper surface of the downward pressing socket part is a downward-inclined slope, and its slope faces the advancing direction of the seedling tray. The lower surface of the upper pressing socket part is parallel to the upper surface of the downward pressing socket part.

[0017] Further, the inner diameter size of the blanking pipe is set to accommodate a single row of seeds to pass through in the vertical direction.

[0018] Furthermore, when the roller moves from the upper end to the lower end of the progress spiral groove, the lifting sleeve descends from the highest point to the lowest point; when the roller moves from the lower end to the upper end of the return spiral groove, the lifting sleeve rises from the lowest point to the highest point; during the descent of the lifting sleeve, the upper pressure nest can support the lower pressure nest; when the lifting sleeve descends to the lowest point, the lower layer's outward-expanding arc ring will leave the lower layer's slot.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] (1) The present invention integrates the nest pressing action (achieved by the cylindrical cam of the nest pressing linkage mechanism driving the roller and the lifting sleeve) and the single seed dropping action (achieved by the two-layer turntable of the single seed dropping mechanism driven by the rotating shaft rotating synchronously with the cylindrical cam) into the same device. In particular, through the coaxial and synchronous chain drive design of the cylindrical cam and the rotating shaft, and the use of a connecting rod to make a single nest pressing linkage mechanism drive all the lifting sleeves to rise and fall synchronously, the precise mechanical synchronization and integrated execution of the two key processes of nest pressing and sowing are achieved. With only one power drive, the standard cycle action of accurately sowing one seed after nest pressing is finally achieved. This design greatly simplifies the equipment structure, avoids redundancy of equipment processes, significantly reduces the floor space and initial investment and maintenance costs, eliminates the transmission positioning error between processes, and improves the overall operation stability, automation level and operation speed.

[0021] (2) The present invention adopts an innovative single-seed seed dropping mechanism, the core of which lies in the precise matching of the circumferentially staggered outward-expanding arc rings on the two-layer turntable and the corresponding notches on the feed tube. When the turntable rotates, the upper and lower outward-expanding arc rings are like two mechanical gate valves that switch on and off alternately, and the space between them is used to accommodate a single seed, ensuring that only one seed is allowed to fall through the feed tube in each rotation cycle. Combined with the restriction of the inner diameter of the feed tube on the single-file passage of seeds, high-precision single-seed control is achieved by pure mechanical means, which fundamentally avoids the instability of the pneumatic method, can effectively prevent missed seeding and reseeding, and significantly improve the uniformity and quality of seedlings.

[0022] (3) The introduced down-pressing nest has important innovations. First, when the down-pressing nest under the upper-pressing nest reaches the lowest point, the down-pressing nest is located below the through-hole of the upper-pressing nest, effectively preventing the substrate from entering the through-hole and playing an anti-blocking role. Second, when the upper-pressing nest rises and the down-pressing nest is reset and separated from the upper-pressing nest under the action of the compression spring, the seeds will first contact the upper surface of the down-pressing nest when falling from the through-hole. The upper surface is designed to be a downward-inclined slope (toward the direction of the hole tray). The seeds will roll along this slope for a short distance before falling into the hole. This design not only ensures that the seed channel is unobstructed, but also cleverly compensates for the continuous movement of the hole tray during the sowing process, so that the seeds can fall into the center of the hole more accurately, further improving the sowing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a seedling-raising device for growing vegetables proposed by the present invention.

[0024] Figure 2 This is a side view of a seedling-raising device for growing vegetables proposed by the present invention.

[0025] Figure 3 This is a front view of a seedling-raising device for growing vegetables proposed by the present invention.

[0026] Figure 4 It is Figure 1 An enlarged view of part A in

[0027] Figure 5 It is Figure 1 An enlarged view of part B in

[0028] Figure 6 This is a schematic diagram of the positional relationship between the indentation linkage mechanism and the C-shaped rod of a seedling-raising device for growing vegetables proposed by the present invention.

[0029] Figure 7 It is Figure 6 An enlarged view of part C in

[0030] Figure 8 It is Figure 6 An enlarged view of part D in

[0031] Figure 9 This is a schematic diagram of the positional relationship between the feeding pipe and the single-seed dropping mechanism of a seedling-raising device for growing vegetables proposed by the present invention.

[0032] Figure 10 It is Figure 1 An enlarged view of part E in

[0033] Among them, 1. Leg, 11. Installation vertical plate, 12. Support, 2. Sowing groove, 21. Conical hopper, 22. Feeding pipe, 3. C-shaped rod, 4. Lifting sleeve, 41. Linking rod, 5. Single-seed dropping mechanism, 51. Rotating shaft, 52. Turntable, 53. Outer expanding arc ring, 54. Slot, 6. Indentation linkage mechanism, 61. Cylindrical cam, 62. Forward spiral groove, 63. Return spiral groove, 64. Roller, 7. Upper indentation part, 71. Through hole, 8. Seed-pointing linkage mechanism, 81. Spring rod, 82. Lower indentation part, 83. Spring seat, 84. Compressed spring, 9. Synchronous chain drive mechanism, 91. Motor, 92. First sprocket, 93. Second sprocket, 94. Chain. <管理编号:

[0034] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0037] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 As shown in , the present invention provides a seedling raising device for planting vegetables, including support feet 1, mounting vertical plates 11 and brackets 12. The mounting vertical plates 11 are arranged between the support feet 1, and the brackets 12 are arranged at the upper ends of the support feet 1. It further includes a sowing groove 2, a conical hopper 21, a blanking pipe 22, a U-shaped rod 3, a lifting sleeve 4, a single-seed dropping mechanism 5, a dimple pressing linkage mechanism 6, an upper dimple pressing member 7 and a seed dropping linkage mechanism 8. The sowing groove 2 is arranged on the bracket 12. The conical hoppers 21 are arranged in an array and communicated with the lower side of the sowing groove 2. The blanking pipe 22 is communicated and arranged at the lower side of the conical hopper 21. The blanking pipe 22 extends vertically downward. The U-shaped rods 3 are arranged in an array on the mounting vertical plates 11 and are located at the lower side of the blanking pipe 22. The lifting sleeve 4 is sleeved outside the blanking pipe 22 in a liftable manner and passes through the U-shaped rod 3 downward. The upper dimple pressing member 7 is connected to the lower end of the lifting sleeve 4. The single-seed dropping mechanism 5 is arranged on one side of the blanking pipe 22, and the seed dropping linkage mechanism 8 is arranged on the upper dimple pressing member 7.<_{0000104}><_{0000105}>The sowing groove 2 is used to accommodate seeds. The seeds are distributed to each blanking pipe 22 through the conical hoppers 21 arranged in an array. The blanking pipe 22 is the channel for the seeds to fall. The U-shaped rod 3 not only serves as an installation base but also plays a guiding role for the lifting sleeve 4. The lifting sleeve 4 is the execution component for realizing the dimple pressing action. The single-seed dropping mechanism 5 accurately controls the timing and quantity of the seed dropping. The seed dropping linkage mechanism 8 and the upper dimple pressing member 7 cooperate to complete the seed dropping action after the dimple pressing.<_{0000106}><_{0000107}>Among them, the dimpling linkage mechanism 6 is arranged on the U-shaped rod 3 at the center, and it includes a cylindrical cam 61, a roller 64, a forward spiral groove 62 and a return spiral groove 63. The cylindrical cam 61 is rotatably arranged on the U-shaped rod 3. The forward spiral groove 62 and the return spiral groove 63 are communicated and opened on the outer peripheral surface of the cylindrical cam 61. The roller 64 is fixedly connected to the lifting sleeve 4.

[0040] The cylindrical cam 61 and the roller 64 fixed on the lifting sleeve 4 form a cam-follower mechanism. Arranging this mechanism at the center position facilitates the subsequent transfer of motion to other units.

[0041] Among them, the single-seed dropping linkage mechanism 8 includes a lower dimpling member 82. The lower dimpling member 82 is located below the upper dimpling member 7. When the upper dimpling member 7 descends, it presses against the lower dimpling member 82 to form an integral body for dimpling.

[0042] As a part of the single-seed dropping linkage mechanism 8, the lower dimpling member 82 is usually located below the upper dimpling member 7. In the dimpling process, the upper dimpling member 7 moves downward and contacts and presses the lower dimpling member 82. The two can jointly form a complete dimpling die to press the substrate in the seedling tray to form a nest hole meeting the sowing requirements.

[0043] Among them, the single-seed dropping mechanism 5 includes a rotating shaft 51, two layers of turntables 52, two layers of outward expanding arc rings 53 and two layers of slots 54. The rotating shaft 51 is rotatably passed through the U-shaped rod 3. The turntables 52 are coaxially fixed on the rotating shaft 51 and are respectively located at different height positions on one side of the blanking pipe 22. The outward expanding arc rings 53 are arranged at the edges of each layer of turntable 52. The slots 54 are opened on one side of the blanking pipe 22 facing the rotating shaft 51 and are arranged at the same height as the two layers of turntables 52. The outward expanding arc rings 53 can extend into and leave the corresponding slots 54 when the turntables 52 rotate to block and release the falling of seeds.

[0044] By arranging two layers of turntables 52 with outward expanding arc rings 53 and making them cooperate with the slots 54 opened at the corresponding heights on the blanking pipe 22, a mechanical seed distribution gating system is formed, which realizes allowing only one seed to pass through the blanking pipe 22 each time, effectively avoiding the phenomena of missed sowing and repeated sowing.

[0045] Among them, the cylindrical cam 61 is coaxially connected to the rotating shaft 51 above. The roller 64 is slidably fitted in the forward spiral groove 62 and the return spiral groove 63. When the cylindrical cam 61 rotates, through the cooperation of the roller 64 with the forward spiral groove 62 and the return spiral groove 63, the lifting sleeve 4 is driven to reciprocate up and down.

[0046] Among them, the seed-point linkage mechanism 8 further includes a compression spring 84, a spring rod 81, and a spring seat 83. The spring rod 81 penetrates through the lower part of the U-shaped rod 3. The spring seat 83 is arranged at the upper end of the spring rod 81. The compression spring 84 is sleeved on the spring rod 81 and supported between the spring seat 83 and the U-shaped rod 3. The lower end of the spring rod 81 is connected to the downward pressing socket member 82.

[0047] The compression spring 84 provides an upward supporting force. When the upper pressing socket member 7 descends to press the downward pressing socket member 82, the spring rod 81 moves downward, and the compression spring 84 is compressed to store energy. When the pressure on the upper pressing socket member 7 is released as it ascends, the compression spring 84 releases energy, pushing the spring rod 81 and the downward pressing socket member 82 to reset upward to the initial position.

[0048] Among them, there is also a synchronous chain drive mechanism 9. The synchronous chain drive mechanism 9 includes a motor 91, a first sprocket 92, a second sprocket 93, and a chain 94. The motor 91 is arranged on the support leg 1. The first sprocket 92 is connected to the output shaft of the motor 91. The second sprocket 93 is coaxially arranged above the turntable 52. The chain 94 is meshed and connected to the first sprocket 92 and all the second sprockets 93.

[0049] Through the transmission of the first sprocket 92, the chain 94, and all the second sprockets 93, the power is transmitted to the rotating shafts 51 of each single-seed dropping mechanism 5. The chain 94 drive can ensure that all the second sprockets 93 rotate synchronously and at a constant speed, ensuring that all the acupoints in one row on the seedling tray perform sowing actions simultaneously, maintaining the consistency of the operation.

[0050] Among them, there is also a linkage rod 41. The linkage rod 41 is horizontally arranged and connected to all the lifting sleeves 4, enabling one pressing socket linkage mechanism 6 to drive all the lifting sleeves 4 to lift and lower synchronously.

[0051] All the juxtaposed lifting sleeves 4 are rigidly connected by a horizontally arranged linkage rod 41. In this way, the lifting motion generated by a single pressing socket linkage mechanism 6 located in the center can be synchronously transmitted to all the lifting sleeves 4 through the linkage rod 41, enabling all the upper pressing socket members 7 to lift and lower simultaneously and with the same stroke, completing the pressing socket actions for a whole row of acupoints. This simplifies the drive system, reducing costs and complexity.

[0052] Among them, the outer expansion arc rings 53 of the upper turntable 52 and the outer expansion arc rings 53 of the lower turntable 52 are arranged with a circumferential stagger and overlap at the ends; when the upper outer expansion arc ring 53 just enters its corresponding notch 54, the lower outer expansion arc ring 53 is about to leave its corresponding notch 54; when the lower outer expansion arc ring 53 just enters its corresponding notch 54, the upper outer expansion arc ring 53 is about to leave its corresponding notch 54; the space between the two turntables 52 can only accommodate one seed.

[0053] The circumferential staggered design of the two layers of outward-expanding arc rings 53 is the key. This specific phase relationship allows the upper and lower "doors" (the cooperation between the outward-expanding arc rings 53 and the slots 54) to open and close alternately: when the upper door is closed (blocking the seeds above), the lower door is about to open; when the upper door is opened (allowing a seed to fall between the two slots 54), the lower door is closed (temporarily catching the seed); then when the lower door is opened (releasing the seed to fall), the upper door is closed again. Combined with the space limitation of only accommodating one seed between the two turntables 52, it ensures that only one seed is released in each 360-degree rotation cycle, achieving high-precision single-seed sowing. The single-seed dropping mechanism 5 can be customized according to the size of different types of spherical seeds.

[0054] Among them, a vertical through hole 71 is opened on the upper pressing nest 7 and is connected to the lifting sleeve 4; the upper surface of the lower pressing nest 82 is a downward inclined surface, and its inclined surface faces the forward direction of the hole tray; the lower surface of the upper pressing nest 7 is arranged parallel to the upper surface of the lower pressing nest 82.

[0055] The through hole 71 on the upper pressing nest member 7 constitutes a channel for the seeds to reach the pressing nest area from the end of the discharge tube 22 through the inside of the lifting sleeve 4. The inclined upper surface design of the lower pressing nest member 82 has an important function: when the upper pressing nest member 7 and the lower pressing nest member 82 are separated, the seeds fall from the through hole 71, and will fall on the inclined surface. Under the action of gravity, they will roll a short distance along the inclined surface in the direction of the hole tray before falling into the hole. This cleverly compensates for the continuous movement of the hole tray at the moment of sowing, ensuring that the seeds fall accurately into the center of the hole. The setting of the lower pressing nest member 82 also plays a key role in preventing the through hole 71 from being blocked. The end of the through hole 71 in the upper pressing nest member 7 is opposite to the surface of the lower pressing nest member 82, so that the through hole 71 will not directly contact the matrix in the hole tray when pressing down. This design uses the lower pressing nest member 82 as a physical barrier to effectively prevent the wet or loose matrix from being reversely squeezed into or adhered to the lower end of the through hole 71 during the pressing process.

[0056] The inner diameter of the feed pipe 22 is set to accommodate a single row of seeds passing through in the vertical direction.

[0057] The inner diameter of the feed pipe 22 is precisely controlled, allowing only seeds to pass through in a single vertical row. Combined with the space limitation between the two turntables 52 that only accommodates one seed, stable and reliable single-seed distribution and falling is achieved.

[0058] Among them, when the roller 64 moves from the upper end to the lower end of the progress spiral groove 62, the lifting sleeve 4 descends from the highest point to the lowest point; when the roller 64 moves from the lower end to the upper end of the return spiral groove 63, the lifting sleeve 4 rises from the lowest point to the highest point; during the descent of the lifting sleeve 4, the upper pressure nest 7 can support the lower pressure nest 82; when the lifting sleeve 4 descends to the lowest point, the lower outer arc ring 53 will leave the lower slot 54.

[0059] The cylindrical cam 61 rotates one circle, and the roller 64 passes through the process spiral groove 62 and the return spiral groove 63 completely. In the process spiral groove 62 section, the roller 64 slides from the high point to the low point, driving the lifting sleeve 4 to complete the descending stroke, and makes the upper pressing nest member 7 contact and push the lower pressing nest member 82 to descend together in the middle, and realizes the nesting in the final stage, and enters the return spiral groove 63 section. At this time, the seeds are released and fall, and the roller 64 moves back from the low point to the high point, driving the lifting sleeve 4 to complete the ascending stroke, and the upper pressing nest member 7 and the lower pressing nest member 82 separate in the middle, and the seeds fall smoothly. This process is precisely coordinated with the seed release timing of the single-seed seed dropping mechanism 5 to complete a nesting and sowing cycle.

[0060] The specific working process is as follows: the device is firmly placed in the corresponding process position, and an appropriate amount of spherical or nearly spherical vegetable seeds (such as cabbage, cabbage seeds, etc.) are evenly filled into the sowing groove 2 at the top. The seeds will be automatically distributed through the cone bucket 21 and fall along the discharge pipe 22, and distributed vertically in a single row in the pipe. The hole tray filled with the seedling matrix is ​​moved to the bottom of the device through the conveying track, ready for pressing and sowing. The motor 91 is started, and the motor 91 will drive the rotating shaft 51 of all single-seed seed dropping mechanisms 5 and the central sowing mechanism 5 through the synchronous chain drive mechanism 9 (first sprocket 92, chain 94, second sprocket 93). The cylindrical cam 61 of the center's nest pressing linkage mechanism 6 rotates synchronously, and the delivery speed of the hole tray is adjusted as needed to match the nest pressing and sowing rhythm of the device. As the cylindrical cam 61 rotates, the center's nest pressing linkage mechanism 6 drives the corresponding lifting sleeve 4 and the connecting rod 41 through the cooperation of the roller 64 with the advance spiral groove 62 and the return spiral groove 63, so that all the lifting sleeves 4 descend synchronously. During the descent, the upper nest pressing member 7 will contact and resist the lower nest pressing member 82 (the pressure spring 84 is compressed at this time), and the combination of the two will press out standard nests on the hole tray matrix. In this process, The two-layer turntable 52 of the single-seed seed dropping mechanism 5 rotates, and the upper and lower layers of the outward-expanding arc rings 53 are precisely matched with the notches 54 of the discharge tube 22 (alternating blocking and releasing), ensuring that only one seed is accurately released from the end of the discharge tube 22 every time the cylindrical cam 61 rotates 360 degrees. By reasonably setting the angular relationship between the advance spiral groove 62, the return spiral groove 63 and the two layers of the outward-expanding arc rings 53, when the lifting sleeve 4 drops to the lowest point (completion of the nesting), the single-seed seed dropping mechanism 5 releases just one seed, and the seed passes through the through holes of the discharge tube 22, the lifting sleeve 4 and the upper nesting member 7. 71, first falls to the upper surface of the lower pressing nest 82, then the lifting sleeve 4 begins to rise, and the upper pressing nest 7 is lifted up accordingly. The lower pressing nest 82 briefly follows the rise under the action of the compression spring 84 and then stops, and separates from the upper pressing nest 7. The seeds now roll down from the inclined upper surface of the lower pressing nest 82 (the inclined surface faces the forward direction of the hole tray) and accurately fall into the nest that has just been pressed. The above-mentioned nest pressing and sowing actions are repeated as the cylindrical cam 61 continues to rotate. Combined with the moving speed of the hole tray, the device can continuously and efficiently complete the automatic nest pressing and single-seed precision sowing operations of spherical vegetable seeds.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

[0063] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A seedling raising device for growing vegetables, comprising supporting legs (1), a mounting vertical plate (11) and a bracket (12), wherein the mounting vertical plate (11) is arranged between the supporting legs (1), and the bracket (12) is arranged at the upper end of the supporting legs (1), characterized in that: It further includes a sowing groove (2), a tapered hopper (21), a blanking pipe (22), a C-shaped rod (3), a lifting sleeve (4), a single-seed dropping mechanism (5), a dimple-linkage mechanism (6), an upper dimple-forming part (7) and a seed-pointing linkage mechanism (8). The sowing groove (2) is arranged on the support (12). The tapered hopper (21) is connected in an array and arranged below the sowing groove (2). The blanking pipe (22) is connected and arranged below the tapered hopper (21). The blanking pipe (22) extends vertically downward. The C-shaped rods (3) are arranged in an array on the mounting vertical plate (11) and are located below the blanking pipe (22). The lifting sleeve (4) is sleeved outside the blanking pipe (22) in a liftable manner and passes through the C-shaped rod (3) downward. The upper dimple-forming part (7) is connected to the lower end of the lifting sleeve (4). The single-seed dropping mechanism (5) is arranged on one side of the blanking pipe (22). The seed-pointing linkage mechanism (8) is arranged on the upper dimple-forming part (7). The dimple-linkage mechanism (6) is arranged on the central C-shaped rod (3) and includes a cylindrical cam (61), a roller (64), a forward spiral groove (62) and a return spiral groove (63). The cylindrical cam (61) is rotatably arranged on the C-shaped rod (3). The forward spiral groove (62) and the return spiral groove (63) are connected and opened on the outer peripheral surface of the cylindrical cam (61). The roller (64) is fixedly connected to the lifting sleeve (4). The seed-pointing linkage mechanism (8) includes a lower dimple-forming part (82). The lower dimple-forming part (82) is located below the upper dimple-forming part (7). When the upper dimple-forming part (7) descends, it abuts against the lower dimple-forming part (82) to form an integral body for dimple forming. The single-seed dropping mechanism (5) includes a rotating shaft (51), two layers of turntables (52), two layers of outward-expanding arc rings (53) and two layers of slots (54). The rotating shaft (51) is rotatably arranged through the C-shaped rod (3). The turntables (52) are coaxially fixed to the rotating shaft (51) and are respectively located at different height positions on one side of the blanking pipe (22). The outward-expanding arc rings (53) are arranged at the edges of each layer of turntable (52). The slots (54) are opened on one side of the blanking pipe (22) facing the rotating shaft (51) and are arranged at the same height as the two layers of turntables (52). The outward-expanding arc ring (53) can extend into and leave the corresponding slot (54) when the turntable (52) rotates to block and release the falling of seeds.

2. A seedling raising device for growing vegetables according to claim 1, characterized in that: The cylindrical cam (61) is coaxially connected to the rotating shaft (51) above. The roller (64) is slidably fitted in the forward spiral groove (62) and the return spiral groove (63). When the cylindrical cam (61) rotates, through the cooperation of the roller (64) with the forward spiral groove (62) and the return spiral groove (63), the lifting sleeve (4) is driven to reciprocate up and down.

3. A seedling raising device for growing vegetables according to claim 2, characterized in that: The point-seeding linkage mechanism (8) further includes a compression spring (84), a spring rod (81), and a spring seat (83). The spring rod (81) passes through the lower part of the C-shaped rod (3). The spring seat (83) is provided at the upper end of the spring rod (81). The compression spring (84) is sleeved on the spring rod (81) and supported between the spring seat (83) and the C-shaped rod (3). The lower end of the spring rod (81) is connected to a downward pressing socket member (82).

4. A seedling raising device for growing vegetables according to claim 3, characterized in that: It further includes a synchronous chain drive mechanism (9). The synchronous chain drive mechanism (9) includes a motor (91), a first sprocket (92), a second sprocket (93), and a chain (94). The motor (91) is provided on the support leg (1). The first sprocket (92) is connected to the output shaft of the motor (91). The second sprocket (93) is coaxially provided above the turntable (52). The chain (94) is meshed with the first sprocket (92) and all the second sprockets (93).

5. The vegetable seedling raising device according to claim 4, characterized in that: It further includes a linkage rod (41). The linkage rod (41) is horizontally arranged and connected to all the lifting sleeves (4), so that one pressing socket linkage mechanism (6) drives all the lifting sleeves (4) to lift and lower synchronously.

6. The seedling raising device for growing vegetables according to claim 5, characterized in that: The outer expanding arc rings (53) of the upper turntable (52) and the outer expanding arc rings (53) of the lower turntable (52) are arranged staggeredly in the circumferential direction and coincide at the ends; When the upper outer expanding arc ring (53) just enters its corresponding notch (54), the lower outer expanding arc ring (53) is about to leave its corresponding notch (54); when the lower outer expanding arc ring (53) just enters its corresponding notch (54), the upper outer expanding arc ring (53) is about to leave its corresponding notch (54); the space between the two turntables (52) can only accommodate one seed.

7. The seedling raising device for growing vegetables according to claim 6, characterized in that: A vertically penetrating through-hole (71) is formed in the upper pressing socket member (7) and is communicated with the lifting sleeve (4); the upper surface of the downward pressing socket member (82) is a downward-inclined slope, and its slope faces the advancing direction of the seed tray; the lower surface of the upper pressing socket member (7) is arranged parallel to the upper surface of the downward pressing socket member (82).

8. The seedling raising device for growing vegetables according to claim 7, characterized in that: The inner diameter of the blanking pipe (22) is set to accommodate a single row of seeds to pass through in the vertical direction.

9. The seedling raising device for growing vegetables according to claim 8, characterized in that: When the roller (64) moves from the upper end to the lower end of the forward spiral groove (62), the lifting sleeve (4) descends from the highest point to the lowest point; when the roller (64) moves from the lower end to the upper end of the return spiral groove (63), the lifting sleeve (4) rises from the lowest point to the highest point; when the lifting sleeve (4) descends, the upper pressing socket member (7) can resist the downward pressing socket member (82); when the lifting sleeve (4) descends to the lowest point, the lower outer expanding arc ring (53) is about to leave the lower notch (54).

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