Precise seeding device for plug seedling of rice

Abstract

The invention discloses a precision seeding device for rice plug seedling, belongs to the technical field of plug seedling seeding, and aims to solve the problem of low efficiency of existing plug seeding. The motor drives the sector gear, the straight gear, the pinion and the transmission disc to rotate, intermittent rotation of the rotating cylinder and accurate displacement control of the adsorption rod are achieved, the effect of automatic and continuous seeding operation is achieved, the seeding efficiency is greatly improved, the problem of slow manual seeding is effectively solved, and the labor intensity of workers is reduced. Negative pressure generated by a negative pressure pump acts on a negative pressure cavity in a rotating cylinder and a negative pressure hole of an adsorption rod, stable adsorption of seeds at the outer end of the adsorption rod is achieved, a sealing block and a spring assembly are combined, it is ensured that the seeds are accurately placed in the center of a hole tray in the seeding process, the precise seeding effect is achieved, and the seeding efficiency is improved. A foundation is laid for cultivating high-quality seedlings.

Description

Technical Field

[0001] The invention relates to the technical field of plug tray seeding and sowing, and in particular to a precision sowing device for rice plug tray seedling cultivation. Background Art

[0002] Plug tray seedling cultivation is a modern seedling cultivation technology that uses light-matrix soilless materials such as peat and vermiculite as seedling cultivation matrix, adopts mechanized precision sowing, and grows seedlings in the plug tray in one go. Each hole is an independent seedling cultivation space, and the seeds grow and develop in their respective holes.

[0003] When growing seedlings in plug trays, the trays usually have multiple groups of holes arranged in an array. These holes provide independent growth space for seeds, which helps to cultivate neat and strong seedlings. However, in the sowing process, to achieve high-quality seedling cultivation, the seeds must be placed accurately in the center of the holes. This precision requirement makes manual sowing extremely challenging. During manual sowing, the operator not only needs to concentrate highly and strive to sow each seed accurately in the center of the hole, but also each sowing action is rather cumbersome and difficult to carry out quickly and continuously.

[0004] This manual operation method results in extremely slow sowing efficiency, which is difficult to meet the needs of large-scale seedling cultivation. At a time when time and labor costs are constantly rising, the slow manual sowing method undoubtedly limits the promotion and application of plug tray seedling technology in large-scale production. Summary of the invention

[0005] The object of the present invention is to provide a precision seeding device for rice seedling cultivation in plug trays, which solves the problem of low efficiency of existing plug tray seeding in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a precision seeding device for raising rice seedlings in plug trays, comprising a workbench and a seeding assembly arranged above the workbench, a seed tray is movably arranged on the top of the workbench, a plug tray is placed on the top of the workbench, a telescopic cylinder is installed on the top of the workbench, the seeding assembly is installed on the telescopic cylinder, a negative pressure pump is also arranged on the top of the workbench, the seeding assembly comprises a rotating cylinder and a fixed shell arranged at the front and rear of the rotating cylinder, a driving mechanism is radially distributed inside the fixed shell, a seeding mechanism is arranged inside the rotating cylinder, and the interior of the rotating cylinder is moved from the inside to the outside A negative pressure chamber, a first slide groove, a second slide groove and a sliding groove are radially distributed in sequence, and the sliding groove is connected to the outside of the rotating cylinder. A negative pressure channel connected to the negative pressure chamber is provided at the rear end of the rotating cylinder. A negative pressure pump is provided above the workbench, and the negative pressure pump is connected to the negative pressure channel through a pipeline. The sowing mechanism includes a sliding plate slidably connected to the inside of the second slide groove and an adsorption rod slidably connected to the inside of the sliding groove. The inner end of the adsorption rod is provided with a slope and extends to the inside of the negative pressure chamber. The outer end of the adsorption rod is used for adsorbing and fixing seeds. The sliding plate is fixedly connected to the adsorption rod, and the driving mechanism is used to drive the sliding plate to move inside the second slide groove.

[0007] Furthermore, a lifting cylinder is fixedly installed below the workbench, and an output end of the lifting cylinder is fixedly connected to the bottom of the seed tray.

[0008] Furthermore, a second spring is installed between the sliding plate and the inner wall of the second sliding groove, a penetrating negative pressure hole is provided inside the adsorption rod, and a receiving groove is provided at the outer end of the adsorption rod, and the receiving groove is used to receive seed particles.

[0009] Furthermore, the outside of the adsorption rod is fixedly connected to the limiting plate, the outside of the adsorption rod is sleeved with a third spring, the third spring is located between the inner wall of the second sliding groove and the limiting plate, and the second spring and the accommodating groove are both used to drive the sliding plate and the adsorption rod to reset.

[0010] Furthermore, a sealing block is slidably connected inside the first slide groove, one end of the sealing block is provided with an inclined surface corresponding to the inner end of the negative pressure cavity, the sealing block is used to seal the inner end of the negative pressure hole, and a fourth spring is provided between the sealing block and the inner wall of the first slide groove.

[0011] Furthermore, the front end of the rotating cylinder is fixedly connected to a spur gear via a shaft, and the driving mechanism includes a motor fixedly arranged inside a fixed shell, and an output end of the motor is fixedly connected to a sector gear.

[0012] Furthermore, both ends of the sliding plate extend to the front and rear exterior of the rotating cylinder, the output end of the telescopic cylinder is fixedly connected to a fixing frame, a baffle is installed below the fixing frame, and the fixing shell is fixedly connected to the fixing frame.

[0013] Furthermore, the driving mechanism also includes a pinion and a transmission plate rotatably connected to the inside of the fixed shell, the pinion corresponds to the fan gear, and a ratchet mechanism is provided between the transmission plate and the pinion; an eccentric shaft is fixedly connected to the inner side of the transmission plate near the edge, and a sliding member is connected to the inside of the fixed shell for sliding up and down movement, the sliding member is provided with a movable groove corresponding to the eccentric shaft, and a shift block corresponding to the end of the sliding plate is provided on the inner side of the sliding member.

[0014] Furthermore, the ratchet mechanism includes tooth grooves evenly distributed on the outside of the pinion, and also includes a third slide groove evenly distributed inside the transmission plate. A ratchet is slidably connected inside the third slide groove, and the cross-section of the ratchet is a right-angled trapezoid. A first spring is provided between the ratchet and the inner wall of the third slide groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a precision seeding device for rice seedling cultivation in plug trays. The device drives a fan-shaped gear, a spur gear, a pinion gear and a transmission plate to rotate by a motor, thereby realizing intermittent rotation of a rotating drum and precise displacement control of an adsorption rod, achieving the effect of automated and continuous seeding operation, greatly improving seeding efficiency, and effectively solving the problem of slow manual seeding. The negative pressure generated by a negative pressure pump is used to act on the negative pressure cavity in the rotating drum and the negative pressure hole of the adsorption rod, thereby realizing stable adsorption of seeds on the outer end of the adsorption rod. Combined with a sealing block and a spring assembly, it is ensured that the seeds are accurately placed at the center of the plug tray during the seeding process, thereby achieving the effect of precise seeding and laying a foundation for cultivating high-quality seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the telescopic cylinder and the sowing assembly of the present invention;

[0019] Figure 3 This is a structural breakdown diagram of the sowing component of the present invention;

[0020] Figure 4 It is a partial structural schematic diagram of the sowing assembly of the present invention;

[0021] Figure 5 It is a cross-sectional view of the rotating drum structure of the present invention;

[0022] Figure 6 It is a partial structural cross-sectional view of the sowing assembly of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the sowing mechanism of the present invention;

[0024] Figure 8It is an exploded view of the driving mechanism structure of the present invention;

[0025] Fig. 9 It is a structural section diagram of the pinion and transmission plate of the present invention.

[0026] In the figure: 1, workbench; 11, lifting cylinder; 2, seed plate; 3, hole plate; 4, telescopic cylinder; 41, fixed frame; 42, baffle; 5, sowing assembly; 51, rotating cylinder; 511, spur gear; 512, negative pressure channel; 513, negative pressure chamber; 514, sliding groove; 515, first sliding groove; 516, second sliding groove; 52, fixed shell; 53, driving mechanism; 531, motor; 532, sector gear; 533, pinion; 5331, tooth groove ; 534, transmission plate; 5341, third slide groove; 5342, ratchet; 5343, first spring; 535, eccentric shaft; 536, sliding member; 537, movable groove; 538, shift block; 54, sowing mechanism; 541, sliding plate; 542, second spring; 543, adsorption rod; 5431, negative pressure hole; 5432, accommodating groove; 544, third spring; 545, limit plate; 546, sealing block; 547, fourth spring; 6, negative pressure pump. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to solve the technical problem of slow efficiency of existing plug tray seeding, such as Figure 1-Figure 9 As shown, the following preferred technical solutions are provided:

[0029] like Figure 1-Figure 4 As shown, a precision seeding device for raising rice seedlings in plug trays comprises a workbench 1 and a seeding assembly 5 arranged above the workbench 1, a seed tray 2 is movably arranged on the top of the workbench 1, a plug tray 3 is placed on the top of the workbench 1, a telescopic cylinder 4 is installed on the top of the workbench 1, the seeding assembly 5 is installed on the telescopic cylinder 4, a negative pressure pump 6 is also arranged on the top of the workbench 1, the seeding assembly 5 comprises a rotating cylinder 51 and a fixed shell 52 arranged outside the rotating cylinder 51 in front and behind, a driving mechanism 53 is radially distributed inside the fixed shell 52, and a seeding mechanism 54 is arranged inside the rotating cylinder 51, as shown in FIG. Figure 5-Figure 7As shown, the interior of the rotating cylinder 51 is radially distributed with a negative pressure chamber 513, a first slide groove 515, a second slide groove 516 and a sliding groove 514 from the inside to the outside, and the sliding groove 514 is connected to the outside of the rotating cylinder 51. The rear end of the rotating cylinder 51 is provided with a negative pressure channel 512 connected to the negative pressure chamber 513. A negative pressure pump 6 is provided above the workbench 1, and the negative pressure pump 6 is connected to the negative pressure channel 512 through a pipeline. The sowing mechanism 54 includes a sliding plate 541 slidably connected to the inside of the second slide groove 516 and an adsorption rod 543 slidably connected to the inside of the sliding groove 514. The inner end of the adsorption rod 543 is provided with a slope and extends to the inside of the negative pressure chamber 513. The outer end of the adsorption rod 543 is used to adsorb and fix seeds. The sliding plate 541 is fixedly connected to the adsorption rod 543, and the driving mechanism 53 is used to drive the sliding plate 541 to move inside the second slide groove 516.

[0030] like Figure 1 As shown, a lifting cylinder 11 is fixedly installed under the workbench 1, and the output end of the lifting cylinder 11 is fixedly connected to the bottom of the seed plate 2. The lifting cylinder 11 is extended to move the seed plate 2 upward to cover the bottom of the rotating cylinder 51, so that the seeds are adsorbed on the outer end of the negative pressure hole adsorption rod 543 for convenience.

[0031] like Figure 7 As shown, a second spring 542 is installed between the sliding plate 541 and the inner wall of the second slide groove 516, a negative pressure hole 5431 is provided inside the adsorption rod 543, and a receiving groove 5432 is provided at the outer end of the adsorption rod 543. The receiving groove 5432 is used to receive seed particles. When the negative pressure pump 6 is working, the negative pressure in the negative pressure chamber 513 is negatively pressurized through the pipeline, and then the negative pressure in the adsorption rod 543 is negatively pressurized, and the seeds are adsorbed in the receiving groove 5432; the outside of the adsorption rod 543 is fixedly connected to the limiting plate 545, and the adsorption rod 543 is A third spring 544 is mounted on the outside and is located between the inner wall of the second slide groove 516 and the limit plate 545. The second spring 542 and the accommodating groove 5432 are both used to drive the sliding plate 541 and the adsorption rod 543 to reset. A sealing block 546 is slidably connected to the inside of the first slide groove 515. One end of the sealing block 546 is provided with an inclined surface corresponding to the inner end of the negative pressure chamber 513. The sealing block 546 is used to seal the inner end of the negative pressure hole 5431. A fourth spring 547 is arranged between the sealing block 546 and the inner wall of the first slide groove 515.

[0032] like Figure 5-Figure 8 As shown, the front end of the rotating cylinder 51 is fixedly connected to the spur gear 511 through an axis, and the driving mechanism 53 includes a motor 531 fixedly arranged inside the fixed shell 52, and the output end of the motor 531 is fixedly connected to the fan gear 532. The motor 531 drives the fan gear 532 to rotate, which can intermittently engage the spur gear 511 and thereby drive the rotating cylinder 51 to rotate intermittently.

[0033] like Figure 4As shown, both ends of the sliding plate 541 extend to the front and rear exterior of the rotating cylinder 51. Figure 2 As shown, the output end of the telescopic cylinder 4 is fixedly connected to a fixing frame 41 , a baffle 42 is installed below the fixing frame 41 , and a fixing shell 52 is fixedly connected to the fixing frame 41 .

[0034] like Figure 8 As shown, the driving mechanism 53 also includes a pinion 533 and a transmission disk 534 rotatably connected to the inside of the fixed shell 52. The pinion 533 corresponds to the fan gear 532. A ratchet mechanism is provided between the transmission disk 534 and the pinion 533. When the motor 531 drives the fan gear 532 to rotate clockwise, it first engages the spur gear 511 to rotate, and then engages the pinion 533 to rotate, thereby driving the transmission disk 534 to rotate.

[0035] An eccentric shaft 535 is fixedly connected to the inner side of the transmission disk 534 near the edge, and a sliding member 536 is connected to the interior of the fixed shell 52 so as to slide up and down. The sliding member 536 is provided with a movable groove 537 corresponding to the eccentric shaft 535, and the inner side of the sliding member 536 is provided with a shifting block 538 corresponding to the end of the sliding plate 541. When the transmission disk 534 rotates, the eccentric shaft 535 moves in the movable groove 537 to drive the sliding member 536 to reciprocate up and down. When the sliding member 536 moves downward, the shifting block 538 can shift the sliding plate 541 downward, drive the adsorption rod 543 to move downward and insert it into the soil of the hole point inside the hole tray 3, and the seed enters the soil, and then the sliding plate 541 and the adsorption rod 543 are reset.

[0036] like Fig. 9 As shown, the ratchet mechanism includes tooth grooves 5331 evenly distributed on the outside of the pinion 533, and also includes a third slide groove 5341 evenly distributed inside the transmission plate 534, and a ratchet 5342 is slidably connected inside the third slide groove 5341. The cross-section of the ratchet tooth 5342 is a right-angled trapezoid, and a first spring 5343 is provided between the ratchet tooth 5342 and the inner wall of the third slide groove 5341.

[0037] Specifically, firstly, seeds are placed inside the seed tray 2, and the plug tray 3 is filled with cultivation soil and placed on the top of the workbench 1. Then, the seed tray 2 is lifted up by the lifting cylinder 11 so that the seeds inside are in contact with the outer surface of the rotating cylinder 51, and the motor 531 is started to drive the motor 531 to rotate clockwise. When the motor 531 rotates clockwise, the spur gear 511 rotates counterclockwise and then the rotating cylinder 51 rotates counterclockwise, and negative pressure is generated by the negative pressure pump 6, so that the seed particles can be firmly adsorbed at the receiving groove 5432;

[0038] When all the adsorption rods 543 have adsorbed the seeds, the telescopic cylinder 4 extends to move the rotating cylinder 51 to the top of the hole tray 3, and then the motor 531 is started to drive the fan gear 532 to rotate counterclockwise. At this time, the spur gear 511 rotates intermittently clockwise, and each rotation can place the adsorption rod 543 at the lowest position. The small gear 533 also rotates clockwise to smoothly drive the transmission plate 534 to rotate. The transmission plate 534 drives the sliding member 536 to reciprocate up and down through the eccentric shaft 535. The shift block 538 on the side drives the sliding plate 541 to move downward. When the sliding plate 541 moves downward, the adsorption rod 543 passes through the soil layer and is inserted into the center of the acupuncture point. During this process, the sealing block 546 pops out. At this time, the adsorption rod 543 and the negative pressure chamber 513 are not connected due to the action of the sealing block 546. During the reset process after the adsorption rod 543 descends to insert the seed into the soil, the inner end of the adsorption rod 543 is blocked by the sealing block 546 to prevent the adsorption rod 543 without seeds from being connected to the negative pressure chamber 513 and destroying the negative pressure state inside the negative pressure chamber 513.

[0039] When sowing is completed for a row of acupuncture points, the telescopic cylinder 4 is extended and the motor 531 is started to continue sowing. When all sowing is completed, when the motor 531 passes the position of the baffle 42, the motor 531 continues to move inward and communicates with the negative pressure chamber 513 under the obstruction of the baffle 42.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision seeding device for rice seedling cultivation in a plug tray, comprising a workbench and a seeding assembly arranged above the workbench, characterized in that: A seed tray is movably provided on the top of the workbench, a hole tray is placed on the top of the workbench, a telescopic cylinder is installed on the top of the workbench, and a sowing assembly is installed on the telescopic cylinder. A negative pressure pump is also provided on the top of the workbench, and the sowing assembly includes a rotating cylinder and a fixed shell arranged before and after the outside of the rotating cylinder, and a driving mechanism is radially distributed inside the fixed shell, and a sowing mechanism is provided inside the rotating cylinder, and a negative pressure chamber, a first slide groove, a second slide groove and a sliding groove are radially distributed inside the rotating cylinder from the inside to the outside, and the sliding groove is connected to the outside of the rotating cylinder, and a negative pressure path connected to the negative pressure chamber is provided at the rear end of the rotating cylinder, and a negative pressure pump is provided above the workbench, and the negative pressure pump is connected to the negative pressure path through a pipeline, and the sowing mechanism includes a sliding plate slidably connected to the inside of the second slide groove and an adsorption rod slidably connected to the inside of the sliding groove, the inner end of the adsorption rod is provided with a slope and extends to the inside of the negative pressure chamber, the outer end of the adsorption rod is used to adsorb and fix seeds, the sliding plate is fixedly connected to the adsorption rod, and the driving mechanism is used to drive the sliding plate to move inside the second slide groove.

2. The precision seeding device for raising rice seedlings in plug trays according to claim 1, characterized in that: A lifting cylinder is fixedly installed below the workbench, and an output end of the lifting cylinder is fixedly connected to the bottom of the seed plate.

3. The precision seeding device for raising rice seedlings in plug trays according to claim 1, characterized in that: A second spring is installed between the sliding plate and the inner wall of the second sliding groove. A penetrating negative pressure hole is provided inside the adsorption rod. A receiving groove is provided at the outer end of the adsorption rod for receiving seed particles.

4. The precision seeding device for raising rice seedlings in plug trays according to claim 3, characterized in that: The outside of the adsorption rod is fixedly connected to the limiting plate, the outside of the adsorption rod is sleeved with a third spring, the third spring is located between the inner wall of the second sliding groove and the limiting plate, and the second spring and the accommodating groove are both used to drive the sliding plate and the adsorption rod to reset.

5. The precision seeding device for raising rice seedlings in plug trays according to claim 4, characterized in that: A sealing block is slidably connected inside the first slide groove, one end of the sealing block is provided with an inclined surface corresponding to the inner end of the negative pressure cavity, the sealing block is used to seal the inner end of the negative pressure hole, and a fourth spring is provided between the sealing block and the inner wall of the first slide groove.

6. The precision seeding device for raising rice seedlings in plug trays according to claim 5, characterized in that: The front end of the rotating cylinder is fixedly connected with a spur gear via a shaft, and the driving mechanism comprises a motor fixedly arranged inside a fixed shell, and an output end of the motor is fixedly connected with a sector gear.

7. The precision seeding device for raising rice seedlings in plug trays according to claim 6, characterized in that: The two ends of the sliding plate extend to the front and rear exterior of the rotating cylinder, the output end of the telescopic cylinder is fixedly connected to a fixing frame, a baffle is installed below the fixing frame, and the fixing shell is fixedly connected to the fixing frame.

8. The precision seeding device for raising rice seedlings in plug trays according to claim 7, characterized in that: The driving mechanism also includes a pinion gear and a transmission disc which are rotatably connected to the interior of the fixed housing. The pinion gear corresponds to the sector gear, and a ratchet mechanism is arranged between the transmission disc and the pinion gear.

9. The precision seeding device for raising rice seedlings in plug trays according to claim 8, characterized in that: An eccentric shaft is fixedly connected to the inner side of the transmission disk near the edge, a sliding member is slidably connected to the interior of the fixed shell, a movable groove corresponding to the eccentric shaft is provided on the sliding member, and a shifting block corresponding to the end of the sliding plate is provided on the inner side of the sliding member.

10. The precision seeding device for raising rice seedlings in plug trays according to claim 9, characterized in that: The ratchet mechanism includes tooth grooves evenly distributed outside the pinion, and also includes a third slide groove evenly distributed inside the transmission plate. A ratchet is slidably connected inside the third slide groove, and the cross-section of the ratchet is a right-angled trapezoid. A first spring is provided between the ratchet and the inner wall of the third slide groove.

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