A power unit suitable for use in a knock-out type transplanting machine

Abstract

The application discloses a power device suitable for an ejection type transplanting machine and relates to the technical field of agricultural machinery. The power device comprises a power source, a power input shaft, an intermittent transmission output shaft, an intermittent transmission input shaft, a continuous transmission input shaft, a continuous transmission belt wheel set, a grooved wheel mechanism, an intermittent transmission belt wheel set, a crank slider mechanism, a ejection rod set and a conveying mechanism. The power input shaft is connected with the power source. The ejection rod set is used for ejecting pot seedlings in a seedling tray. The conveying mechanism is used for conveying the seedling tray to realize seedling tray feeding work. The power input shaft drives the ejection rod set to move through the continuous transmission belt wheel set and the crank slider mechanism, and the power input shaft drives the conveying mechanism to move through the grooved wheel mechanism and the intermittent transmission belt wheel set. The power device adopts one power source, can realize intermittent feeding of the seedling tray and continuous ejection of the pot seedlings, has high automation degree, can accurately and cooperatively cooperate the seedling tray feeding work with the pot seedling ejection work, and greatly improves the working effect of the ejection type transplanting machine.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more specifically to a power unit suitable for top-mounted transplanters. Background Technology

[0002] Transplanting is a highly efficient planting method in modern agriculture. It can improve the quality of seedlings, reduce planting injuries, increase survival rate and yield, and is suitable for mechanized and large-scale production. By using transplanting machines, transplanting efficiency can be greatly improved, labor costs can be reduced, and transplanting quality can be guaranteed to achieve high and stable yields. At the same time, it meets the needs of green and intensive modern agriculture and promotes the large-scale and standardized development of agricultural production.

[0003] Transplanters are divided into semi-automatic and fully automatic types. Currently, the most widely used transplanters on the market are semi-automatic. Semi-automatic transplanters require manual operation to complete the seedling picking and placing process, which is labor-intensive. Furthermore, the machine only serves to plant the seedlings in the field, resulting in a low level of mechanization and automation. Fully automatic transplanters, on the other hand, can automatically pick and place seedlings. The transplanter, consisting of two or three sets of mechanisms, completes the three actions of picking, placing, and planting seedlings separately. However, the technology of fully automatic transplanters is not yet mature, and their seedling picking efficiency and success rate are lower than those of semi-automatic transplanters.

[0004] Currently, most fully automatic transplanters are clamping type, which directly clamps the stems or substrate of the seedlings using an end effector. However, this type of fully automatic transplanter inevitably damages the seedlings, affecting the transplanting effect. In contrast, the top-out transplanter uses a push rod to push the seedlings out of the drainage holes at the bottom of the seedling tray. After detachment, the seedlings are typically fed into the planting mechanism via a conveyor belt or by falling, achieving automatic retrieval and placement, thus improving efficiency and success rate. The top-out transplanter requires intermittent feeding of the seedling tray, working in conjunction with the push rod to eject the seedlings. The power components driving the push rod and the seedling tray feeding are independent power sources, making precise coordination between the tray feeding and seedling ejection processes impossible. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems and provide a power device suitable for top-out transplanters. This power device uses a single power source and can realize intermittent feeding of seedling trays and continuous ejection of seedlings from pots. It has a high degree of automation, enabling precise coordination between the seedling tray feeding operation and the seedling ejection operation, which greatly improves the working effect of the top-out transplanter.

[0006] The objective of this invention is achieved through the following technical solution: A power unit suitable for a top-mounted transplanter includes a power source, a power input shaft, an intermittent transmission output shaft, an intermittent transmission input shaft, a continuous transmission input shaft, a continuous transmission pulley assembly, a Geneva mechanism, an intermittent transmission pulley assembly, a crank-slider mechanism, a push rod assembly, and a conveying mechanism; wherein, The power input shaft is connected to the power source; One end of the continuous transmission pulley set is connected to the power input shaft, and the other end of the continuous transmission pulley set is connected to the continuous transmission input shaft. The continuous transmission pulley set is used to transmit power from the power input shaft to the continuous transmission input shaft. The push rod assembly is used to push the seedlings out of the seedling tray. One end of the crank-slider mechanism is connected to the continuous transmission input shaft, and the other end of the crank-slider mechanism is connected to the push rod assembly. The crank-slider mechanism is used to transmit the power from the continuous transmission input shaft to the push rod assembly. One end of the Geneva mechanism is connected to the power input shaft, and the other end of the Geneva mechanism is connected to the intermittent transmission output shaft. The Geneva mechanism is used to intermittently transmit power from the power input shaft to the intermittent transmission output shaft. One end of the intermittent transmission pulley set is connected to the intermittent transmission output shaft, and the other end of the intermittent transmission pulley set is connected to the intermittent transmission input shaft. The intermittent transmission pulley set is used to transmit the power from the intermittent transmission output shaft to the intermittent transmission input shaft. The conveying mechanism is used to convey seedling trays to realize the seedling tray feeding operation, and the intermittent transmission input shaft is connected to the conveying mechanism.

[0007] The working principle of the power unit applicable to the top-mounted transplanter is as follows: The power source continuously and stably outputs power to the power input shaft, enabling stable rotation. This rotation drives the continuous transmission pulley system, which in turn drives the continuous transmission input shaft. The power from the input shaft, transmitted through a crank-slider mechanism, drives the push rod assembly to continuously eject seedlings from the seedling tray. Simultaneously, the motion of the power input shaft drives the Geneva wheel mechanism, causing the intermittent transmission output shaft to rotate intermittently. The intermittent transmission pulley system transmits this intermittent power to the conveying mechanism, enabling intermittent feeding of the seedling tray.

[0008] In a preferred embodiment of the present invention, the Geneva mechanism includes a dial wheel mounted on a power input shaft and a Geneva wheel mounted on an intermittent transmission output shaft; the Geneva wheel and the dial wheel cooperate with each other; wherein the Geneva wheel includes a Geneva wheel body mounted on the intermittent transmission output shaft and slots evenly distributed along the circumference on the Geneva wheel body; the dial wheel includes two impeller plates mounted on the power input shaft and a lever mounted between the impeller plates. In the above structure, during operation, there is a periodic cooperation between the lever and the slots; the power input shaft drives the two impeller plates to rotate, causing the lever to rotate together. When the lever enters the slot, the lever cooperates with the slot, and the lever will move the slot, thereby driving the entire Geneva wheel to rotate. As the lever rotates, the lever will leave the slot. When the lever leaves the slot, the Geneva wheel stops rotating until the next lever enters the next slot of the Geneva wheel, forming a complete intermittent rotation cycle. The two impeller plates can also axially limit the Geneva wheel, ensuring the stability of the cooperation between the Geneva wheel and the dial wheel.

[0009] Preferably, the grooved wheel further includes a concave locking arc disposed between two adjacent grooves, and the dial wheel further includes an arc-shaped block disposed between two impeller plates. In the above structure, during operation, there is a periodic engagement between the concave locking arc and the arc-shaped block; by setting the arc-shaped block and the concave locking arc, it can be ensured that the grooved wheel will not rotate when the arc-shaped block rotates, facilitating the smooth entry of the dial lever into the groove and realizing the intermittent movement of the grooved wheel.

[0010] Furthermore, the arc-shaped block has an arc-shaped convex surface, and the side of the arc-shaped block opposite to the arc-shaped convex surface is an arc-shaped concave surface. The lever is positioned at the position corresponding to the arc-shaped concave surface. In the above structure, when the lever is turned, the arc-shaped concave surface can effectively avoid the slot opening, facilitating the rotation of the slotted wheel.

[0011] Preferably, the power unit further includes a frame, on which the power input shaft, intermittent transmission output shaft, intermittent transmission input shaft, and continuous transmission input shaft are all rotatably mounted. The frame facilitates the installation of each shaft.

[0012] Preferably, the continuous transmission pulley assembly includes a continuous transmission output pulley mounted on the power input shaft and a continuous transmission input pulley mounted on the continuous transmission input shaft; the continuous transmission output pulley and the continuous transmission input pulley are connected by a continuous transmission belt. In the above structure, the continuous transmission output pulley rotates with the power input shaft, and through the continuous transmission belt, drives the continuous transmission input pulley to rotate, thereby driving the continuous transmission input shaft to rotate.

[0013] Preferably, the crank-slider mechanism includes a crank mounted on a continuous transmission input shaft and a connecting rod disposed between the crank and the push rod assembly. One end of the connecting rod is hinged to the crank, and the other end of the connecting rod is hinged to the push rod assembly. In the above structure, the rotation of the continuous transmission input shaft drives the drive shaft to rotate, thereby driving the connecting rod to move, which in turn drives the push rod assembly to perform a reciprocating pushing motion, thereby pushing the seedlings out of the seedling tray.

[0014] Preferably, the push rod assembly includes a push rod frame slidably mounted on the frame along a straight line and multiple push rods mounted on the push rod frame; the multiple push rods are evenly arranged along the length direction of the push rod frame, and the push rod frame is hinged to the connecting rod. A crank-slider mechanism drives the push rod frame to reciprocate along a straight line on the frame, thereby synchronously pushing out a row of seedlings from the seedling tray by driving the multiple push rods to move synchronously.

[0015] Preferably, the intermittent transmission pulley assembly includes an intermittent transmission output pulley mounted on the intermittent transmission output shaft and an intermittent transmission input pulley mounted on the intermittent transmission input shaft; the intermittent transmission output pulley and the intermittent transmission input pulley are connected by an intermittent transmission belt. In the above structure, the pulley drives the intermittent transmission output shaft to move intermittently, thereby driving the intermittent transmission output pulley to move, which in turn drives the intermittent transmission input pulley to rotate via the intermittent transmission belt, thereby driving the conveying mechanism to move intermittently.

[0016] Preferably, the conveying mechanism includes two sets of opposing chain conveying assemblies and multiple conveying rods disposed between the two sets of chain conveying assemblies; each set of chain conveying assemblies includes a driving sprocket, a first driven sprocket, a second driven sprocket, and a chain; the driving sprocket, the first driven sprocket, and the second driven sprocket are triangularly distributed, and the chain meshes with the driving sprocket, the first driven sprocket, and the second driven sprocket; wherein, the driving sprocket is disposed on the intermittent transmission input shaft, one end of the conveying rod is connected to one of the chains, and the other end of the conveying rod is connected to the other chain; the multiple conveying rods are arranged along the direction of chain rotation. In the above structure, when the intermittent transmission input shaft rotates intermittently, it drives the two driving sprockets to rotate synchronously. With the cooperation of the first driven sprocket and the second driven sprocket, the two chains rotate synchronously and intermittently. Each row of holes in the seedling tray will be engaged between the two conveying rods. The seedling tray is conveyed by the movement of the conveying rods along the chain. When the seedlings are conveyed to the position corresponding to the top rod group, a row of seedlings in the seedling tray is synchronously pushed out.

[0017] Preferably, the two second driven sprockets are connected by a synchronizing rod. By setting the synchronizing rod, the two second driven sprockets are ensured to move synchronously, thereby ensuring that the two chains can move synchronously and improving the conveying accuracy.

[0018] Preferably, the frame is provided with multiple sets of positioning components for positioning the seedling trays along the conveying direction of the seedling trays. Each positioning component includes a mounting rod fixed to the frame and multiple positioning blocks evenly distributed along the axis of the mounting rod. The distance between adjacent positioning blocks gradually decreases along the conveying direction of the seedling trays. In this structure, the distance between adjacent positioning blocks gradually decreases along the conveying direction of the seedling trays, allowing the positioning blocks of the preceding positioning components to perform initial coarse positioning of the seedling trays. The seedling tray's cells are guided to the positions between adjacent positioning blocks. As the distance between the positioning blocks gradually decreases, the cells are positioned progressively, resulting in higher positioning accuracy. This ensures that the position of the cell corresponds to the position of the push rod, and the back-and-forth pushing motion of the push rod can push the seedlings out of the cells.

[0019] Furthermore, the positioning components are provided in three sets; along the conveying direction of the seedling tray, the three sets of positioning components are a first positioning component, a second positioning component, and a third positioning component; the distance between two adjacent positioning blocks in the first positioning component is greater than the distance between two adjacent positioning blocks in the second positioning component; the distance between two adjacent positioning blocks in the second positioning component is greater than the distance between two adjacent positioning blocks in the third positioning component; the frame is provided with guide rods, and the guide rods are provided with multiple guide holes, and the top rods are correspondingly and slidably connected to the guide holes; the positioning blocks in the third positioning component are located between two adjacent guide holes; the purpose is that after the seedlings are guided and positioned by the two positioning blocks, the seedlings can correspond to the top rods in the guide holes, so as to realize the seedling ejection operation; by setting three sets of positioning components, the position of the seedling tray is gradually adjusted, and the positional accuracy of the seedling tray is improved.

[0020] The positioning block is a cone-shaped positioning block, which can better guide the acupoint.

[0021] Compared with the prior art, the present invention has the following advantages: 1. The power device in this invention provides a continuous and stable power output to the power input shaft. The power from the power input shaft is distributed to the intermittent transmission output shaft and the continuous transmission input shaft through a grooved wheel mechanism and a continuous transmission pulley group, respectively. This achieves a single power source output, which drives the intermittent operation of the conveying mechanism and the continuous operation of the push rod group. When applied to a top-out transplanter, it enables intermittent feeding of seedling trays and continuous ejection of potted seedlings. The high degree of automation allows for precise coordination between the seedling tray feeding operation and the potted seedling ejection operation, greatly improving the working efficiency of the top-out transplanter.

[0022] 2. The power unit in this invention achieves two different operating modes by using a single power source, resulting in a simpler structure and reduced costs. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of one specific embodiment of a power device suitable for a top-mounted transplanter according to the present invention.

[0024] Figure 2 This is a cross-sectional view of the hidden portion of the power unit frame in this invention.

[0025] Figure 3 This is a three-dimensional structural diagram of the power input shaft, the Geneva mechanism, the intermittent transmission pulley group, and part of the conveying mechanism in this invention.

[0026] Figure 4 This is a cross-sectional view of the Geneva mechanism in this invention.

[0027] Figure 5 This is an exploded view of the Geneva mechanism in this invention.

[0028] Figure 6 This is a three-dimensional structural diagram of the intermittent transmission input pulley in this invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the continuous transmission input shaft, push rod assembly, crank-slider mechanism, and positioning component in this invention.

[0030] Figure 8 This is a three-dimensional structural diagram of the continuous transmission input shaft, push rod assembly, and crank-slider mechanism in this invention.

[0031] Figure 9 This is a three-dimensional structural diagram of the three sets of positioning components in this invention.

[0032] Figure 10 This is a three-dimensional structural diagram of the conveying mechanism in this invention. Detailed Implementation

[0033] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0034] See Figures 1-2 This embodiment discloses a power unit suitable for a top-mounted transplanter, including a power source, a power input shaft 1, an intermittent transmission output shaft 2, an intermittent transmission input shaft 3, a continuous transmission input shaft 4, a continuous transmission pulley group 5, a grooved wheel mechanism 6, an intermittent transmission pulley group 7, a crank-slider mechanism 8, a top rod group 9, and a conveying mechanism 10.

[0035] See Figures 1-3 The power input shaft 1 is connected to the power source; the power source is a motor, which continuously and stably outputs power to the power input shaft 1.

[0036] See Figures 1-10 One end of the continuous transmission pulley set 5 is connected to the power input shaft 1, and the other end of the continuous transmission pulley set 5 is connected to the continuous transmission input shaft 4. The continuous transmission pulley set 5 is used to transmit the power from the power input shaft 1 to the continuous transmission input shaft 4.

[0037] See Figures 1-10 The push rod assembly 9 is used to push the seedlings out of the seedling tray. One end of the crank-slider mechanism 8 is connected to the continuous transmission input shaft 4, and the other end of the crank-slider mechanism 8 is connected to the push rod assembly 9. The crank-slider mechanism 8 is used to transmit the power of the continuous transmission input shaft 4 to the push rod assembly 9.

[0038] See Figures 1-10 One end of the Geneva mechanism 6 is connected to the power input shaft 1, and the other end of the Geneva mechanism 6 is connected to the intermittent transmission output shaft 2. The Geneva mechanism 6 is used to intermittently transmit power from the power input shaft 1 to the intermittent transmission output shaft 2.

[0039] See Figures 1-10 One end of the intermittent transmission pulley set 7 is connected to the intermittent transmission output shaft 2, and the other end of the intermittent transmission pulley set 7 is connected to the intermittent transmission input shaft 3. The intermittent transmission pulley set 7 is used to transmit the power of the intermittent transmission output shaft 2 to the intermittent transmission input shaft 3.

[0040] See Figures 1-10 The conveying mechanism 10 is used to convey seedling trays to realize seedling tray feeding operations, and the intermittent transmission input shaft 3 is connected to the conveying mechanism 10.

[0041] See Figures 1-3 During operation, the motor continuously and stably outputs power to the power input shaft 1, which then distributes the power to the intermittent transmission input shaft 3 and the continuous transmission input shaft 4 through the grooved wheel mechanism 6 and the continuous transmission pulley group 5, respectively. This allows a single power source to simultaneously drive the intermittent operation of the conveying mechanism 10 and the continuous operation of the push rod group 9. The intermittent and continuous operations can form a periodic operational coordination. When applied to a top-out transplanter, it can complete the two functions of intermittent feeding and continuous ejection of the seedling tray, and the two functions can be precisely and orderly coordinated with each other.

[0042] See Figures 1-5The Geneva mechanism 6 includes a dial wheel 6-1 mounted on the power input shaft 1 and a Geneva wheel 6-2 mounted on the intermittent transmission output shaft 2; the Geneva wheel 6-2 and the dial wheel 6-1 cooperate with each other; wherein, the Geneva wheel 6-2 includes a Geneva wheel body 6-21 mounted on the intermittent transmission output shaft 2 and slots 6-22 evenly distributed along the circumference on the Geneva wheel body 6-21; the dial wheel 6-1 includes two impeller plates 6-11 mounted on the power input shaft 1 and a lever 6-12 mounted between the impeller plates 6-11. In the above structure, during operation, there is a periodic engagement between the lever 6-12 and the slot 6-22. The power input shaft 1 drives the two impeller plates 6-11 to rotate, which in turn drives the lever 6-12 to rotate. When the lever 6-12 enters the slot 6-22, the lever 6-12 engages with the slot 6-22, and the lever 6-12 will move the slot 6-22, thereby driving the entire grooved wheel 6-2 to rotate. As the lever 6-12 rotates, it will leave the slot 6-22. When the lever 6-12 leaves the slot 6-22, the grooved wheel 6-2 stops rotating until the next lever 6-12 enters the next slot 6-22 of the grooved wheel 6-2, forming a complete intermittent rotation cycle. The two impeller plates 6-11 can also axially limit the grooved wheel 6-2, ensuring the stability of the engagement between the grooved wheel 6-2 and the lever 6-1.

[0043] See Figures 1-5 The grooved wheel 6-2 further includes a concave locking arc 6-23 disposed between two adjacent grooves 6-22, and the dial wheel 6-1 further includes an arc-shaped block 6-13 disposed between two impeller plates 6-11, the arc-shaped block 6-13 being integrally connected to the two impeller plates 6-11. In the above structure, during operation, there is a periodic engagement between the concave locking arc 6-23 and the arc-shaped block 6-13; by setting the arc-shaped block 6-13 and the concave locking arc 6-23, it can be ensured that the grooved wheel 6-2 will not rotate when the arc-shaped block 6-13 rotates, facilitating the smooth entry of the dial lever 6-12 into the groove 6-22, and realizing the intermittent movement of the grooved wheel 6-2.

[0044] See Figures 1-5 The arc-shaped block 6-13 has an arc-shaped convex surface, and the side of the arc-shaped block 6-13 opposite to the arc-shaped convex surface is an arc-shaped concave surface. The lever 6-12 is positioned corresponding to the arc-shaped concave surface. In the above structure, when the lever 6-12 is turned, the arc-shaped concave surface can effectively avoid the slot 6-22, facilitating the rotation of the slotted wheel 6-2.

[0045] See Figures 1-5The grooved wheel 6-2 has eight slots 6-22. When the lever 6-12 of the dial wheel 6-1 enters the first slot 6-22, it drives the grooved wheel 6-2 to rotate 45°. The dial wheel 6-1 needs to rotate 135° to make the lever 6-12 of the dial wheel 6-1 leave the first slot 6-22. This process is the operation process of the grooved wheel 6-2. Because the dial wheel 6-1 rotates continuously and stably, from 135° to 360° after leaving the slot 6-22, the arc of the dial wheel 6-1... Block 6-13 engages with the concave locking arc 6-23 of the grooved wheel 6-2, thus the grooved wheel 6-2 remains stationary. This process is the stationary process of the grooved wheel 6-2 until the lever 6-12 of the dial wheel 6-1 enters the second slot 6-22, repeating the above movement to complete one complete cycle of intermittent operation. Since the grooved wheel 6-2 is fixedly connected to the intermittent transmission output shaft 2 by a key and a set screw, all transmission components connected to the intermittent transmission output shaft 2 can complete the intermittent operation process.

[0046] See Figures 1-10 The power unit also includes a frame 11, on which the power input shaft 1, intermittent transmission output shaft 2, intermittent transmission input shaft 3, and continuous transmission input shaft 4 are all rotatably mounted. The frame 11 facilitates the installation of each shaft.

[0047] See Figures 1-10 The continuous transmission pulley assembly 5 includes a continuous transmission output pulley 5-1 mounted on the power input shaft 1 and a continuous transmission input pulley 5-2 mounted on the continuous transmission input shaft 4. The continuous transmission output pulley 5-1 and the continuous transmission input pulley 5-2 are connected by a continuous transmission belt (not shown in the figure). In the above structure, the continuous transmission output pulley 5-1 rotates with the power input shaft 1, and through the continuous transmission belt, drives the continuous transmission input pulley 5-2 to rotate, thereby driving the continuous transmission input shaft 4 to rotate.

[0048] See Figures 1-10 The dial 6-1 is fixed to the power input shaft 1 by a key and a set screw, and the continuous transmission output pulley 5-1 is fixed to the power input shaft 1 by a key and a set screw.

[0049] See Figures 1-10 In other embodiments, the continuous transmission pulley group 5 can be replaced with pulleys of the same specification but with different transmission ratio parameters, based on the rotational speed of the continuous transmission input shaft 4, to meet the reciprocating ejection cycle of the push rod group 9.

[0050] See Figures 1-10The crank-slider mechanism 8 includes a crank 8-1 mounted on the continuous transmission input shaft 4 and a connecting rod 8-2 positioned between the crank 8-1 and the push rod assembly 9. One end of the connecting rod 8-2 is hinged to the crank 8-1, and the other end is hinged to the push rod assembly 9. In this structure, the rotation of the continuous transmission input shaft 4 drives the drive shaft to rotate, which in turn drives the connecting rod 8-2 to move, thereby causing the push rod assembly 9 to perform a reciprocating pushing motion, thus pushing the seedlings out of the seedling tray.

[0051] See Figures 1-10 The crank 8-1 has a rotation radius of 35mm and can complete a reciprocating motion with a stroke of 70mm. The continuous transmission input pulley 5-2 is fixed on the continuous transmission input shaft 4 by a key and a set screw, and cooperates with the continuous transmission output pulley 5-1 on the power input shaft 1 through a continuous transmission belt. The transmission ratio between the continuous transmission output pulley 5-1 and the continuous transmission input pulley 5-2 is 1:1, which completes the continuous rotation operation process.

[0052] See Figures 1-10 The push rod assembly 9 includes a push rod frame 9-1 slidably mounted on the frame 11 along a straight line and multiple push rods 9-2 mounted on the push rod frame 9-1; the multiple push rods 9-2 are evenly arranged along the length of the push rod frame 9-1, and the push rod frame 9-1 is hinged to the connecting rod 8-2. Through the crank-slider mechanism 8, the push rod frame 9-1 is driven to reciprocate along a straight line on the frame 11, thereby driving the multiple push rods 9-2 to move synchronously, thus synchronously pushing out a row of seedlings from the seedling tray.

[0053] See Figures 1-10 The frame 11 is provided with slide rails 12 on both sides. The two ends of the top rod frame 9-1 are slidably connected to the slide rails 12. By setting the slide rails 12, the direction of reciprocating motion of the top rod frame 9-1 is restricted to ensure the stability of the motion. The top rod assembly 9 is limited by the slide rails 12 and performs reciprocating linear motion.

[0054] See Figures 1-10 The slide rail 12 is installed at a 45° angle to the horizontal direction, and the rotation center of the continuously ejected top rod assembly 9 is not on the same straight line as the slide rail 12, which can avoid dead point jamming and realize the continuous ejection process at a 45° angle. The top rod frame 9-1 is made of square steel and has a sliding groove, which is connected to the slide rail 12. There are nine top rods 9-2. The top rod assembly 9 can be removed individually. The top rod 9-2 is provided with a sliding mounting groove, which slides with the top rod frame 9-1. The top rod 9-2 is fixed to the top rod frame 9-1 by screws. After loosening the screws, the sliding mounting groove and the top rod frame 9-1 can slide relative to each other. Therefore, the number and spacing of the top rods 9-2 can be adjusted to adapt to the ejection operation of different seedling tray sizes.

[0055] See Figures 1-3 The intermittent transmission pulley assembly 7 includes an intermittent transmission output pulley 7-1 mounted on the intermittent transmission output shaft 2 and an intermittent transmission input pulley 7-2 mounted on the intermittent transmission input shaft 3. The intermittent transmission output pulley 7-1 and the intermittent transmission input pulley 7-2 are connected by an intermittent transmission belt (not shown in the figure). In the above structure, the grooved pulley 6-2 drives the intermittent transmission output shaft 2 to move intermittently, thereby driving the intermittent transmission output pulley 7-1 to move. Through the intermittent transmission belt, the intermittent transmission input pulley 7-2 rotates, thereby driving the conveying mechanism 10 to move intermittently.

[0056] See Figures 1-10 The transmission ratio between the intermittent transmission output pulley 7-1 and the intermittent transmission input pulley 7-2 is 2:1. The intermittent transmission input pulley 7-2 includes a pulley body 7-21 and an annular buckle. The shoulder 7-22 of the pulley body 7-21 has a cross groove 7-23, which is installed on the intermittent transmission input shaft 3 and fixed to the cross groove 7-23 of the shoulder 7-22 by the annular buckle. The two ends of the annular buckle are locked to the shoulder 7-22 of the pulley body 7-21 by bolts, thus fixing the pulley body 7-21 to the intermittent transmission input shaft 3. Loosening the bolts at both ends of the annular buckle can adjust the relative angle between the pulley body 7-21 and the intermittent transmission input shaft 3. The intermittent transmission input pulley 7-2 can achieve single-cycle operation by adjusting the tightness of the annular buckle. During operation, the timing phase of the intermittent working components within a single cycle of the intermittent transmission pulley group 7 can be adjusted by removing the annular buckle. At this time, rotating the circumferential angle of the intermittent transmission input shaft 3 will not cause other components to operate. After adjustment, the locking annular buckle is installed and tightened, and the mechanism operates cyclically. This mechanism can convert continuous operation to intermittent operation, and the relationship between the operation cycles of continuous and intermittent operation can be flexibly adjusted through the transmission ratio of the pulleys and the parameter dimensions of the grooved wheel mechanism 6. The timing phase relationship can be corrected through the relative angle of the intermittent transmission input pulley 7-2.

[0057] See Figures 1-10 The intermittent transmission output shaft 2, intermittent transmission input shaft 3, grooved wheel mechanism 6, intermittent transmission pulley group 7, and conveying mechanism 10 constitute the intermittent mechanism, while the continuous transmission input shaft 4, continuous transmission pulley group 5, crank-slider mechanism 8, and push rod group 9 constitute the continuous motion mechanism. The motion process of the intermittent mechanism represents the seedling tray feeding process. At this time, the push rod group 9 in the continuous motion mechanism is in the retraction process. When the intermittent mechanism enters the stationary phase, the crank-slider mechanism 8 drives the push rod group 9 to perform the pushing action. The two phases correspond and cooperate. The intermittent transmission input pulley 7-2 can adjust the single-cycle timing phase by loosening or loosening the ring buckle, thereby realizing the precise coordination of the continuous motion and intermittent motion operation processes.

[0058] See Figures 1-10 The conveying mechanism 10 includes two sets of opposing chain conveying assemblies and a plurality of conveying rods 10-1 (partially shown in the figure) disposed between the two sets of chain conveying assemblies. Each set of chain conveying assemblies includes a driving sprocket 10-2, a first driven sprocket 10-3, a second driven sprocket 10-4, and a chain 10-5. The driving sprocket 10-2, the first driven sprocket 10-3, and the second driven sprocket 10-4 are arranged in a triangular pattern. The chain 10-5 meshes with the driving sprocket 10-2, the first driven sprocket 10-3, and the second driven sprocket 10-4. The driving sprocket 10-2 is mounted on the intermittent transmission input shaft 3. One end of each conveying rod 10-1 is connected to one of the chains 10-5, and the other end of each conveying rod 10-1 is connected to the other chain 10-5. The plurality of conveying rods 10-1 are arranged along the direction of rotation of the chain 10-5. In the above structure, when the intermittent transmission input shaft 3 rotates intermittently, it drives the two driving sprockets 10-2 to rotate synchronously. With the cooperation of the first driven sprocket 10-3 and the second driven sprocket 10-4, it drives the two chains 10-5 to rotate synchronously and intermittently. Each row of holes in the seedling tray will be inserted between the two conveying rods 10-1. The seedling tray is conveyed by the movement of the conveying rods 10-1 along with the chains 10-5. When the seedling tray is conveyed to the position corresponding to the top rod group 9, a row of seedlings in the seedling tray is pushed out synchronously.

[0059] See Figures 1-10 The two second driven sprockets 10-4 are connected by a synchronizing rod 10-6. By setting the synchronizing rod 10-6, the two second driven sprockets 10-4 are ensured to move synchronously, thereby ensuring that the two chains 10-5 can move synchronously and improving the conveying accuracy.

[0060] See Figures 1-10 The frame 11 is provided with multiple sets of positioning components 13 for positioning the seedling trays along the conveying direction of the seedling trays. Each positioning component 13 includes a mounting rod 13-1 fixed to the frame 11 and multiple positioning blocks 13-2 evenly distributed along the axis of the mounting rod 13-1. The distance between adjacent positioning blocks 13-2 gradually decreases along the conveying direction of the seedling trays. In this structure, the distance between adjacent positioning blocks 13-2 gradually decreases along the conveying direction of the seedling trays, allowing the positioning blocks 13-2 of the preceding positioning component 13 to perform initial coarse positioning of the seedling trays. The seedling tray cells are guided to the positions between adjacent positioning blocks 13-2. As the distance between positioning blocks 13-2 gradually decreases, the seedling tray cells are positioned progressively, with increasing positioning accuracy. This ensures that the position of the seedling tray corresponds to the position of the push rod 9-2. The back-and-forth pushing motion of the push rod 9-2 can push the seedlings out of the seedling trays.

[0061] See Figures 1-10The positioning components 13 are provided in three sets. Along the conveying direction of the seedling tray, the three sets of positioning components 13 are respectively a first positioning component, a second positioning component, and a third positioning component. The distance between two adjacent positioning blocks 13-2 in the first positioning component is greater than the distance between two adjacent positioning blocks 13-2 in the second positioning component. The distance between two adjacent positioning blocks 13-2 in the second positioning component is greater than the distance between two adjacent positioning blocks 13-2 in the third positioning component. The frame 11 is provided with a guide rod 14, and the guide rod 14 is provided with multiple guide holes 14-1. The top rod 9-2 is correspondingly set with the guide holes 14-1 and slidably connected. The positioning block 13-2 in the third positioning component is located between two adjacent guide holes 14-1. The purpose is that after the hole is guided and positioned by the two positioning blocks 13-2, the hole can correspond to the top rod 9-2 in the guide hole 14-1, so as to realize the popping operation of the seedling. By setting three sets of positioning components 13, the position of the seedling tray is gradually adjusted, and the positional accuracy of the seedling tray is improved.

[0062] See Figures 1-10 The positioning block 13-2 is a conical positioning block, which can better guide the acupoint.

[0063] See Figures 1-3 The intermittent transmission input shaft 3, intermittent transmission output shaft 2, and power input shaft 1 are arranged on the frame 11 from top to bottom.

[0064] See Figures 1-3 The frame 11 includes a base frame 11-1 and two side plates 11-2 mounted on the base frame 11-1. The power input shaft 1, intermittent transmission output shaft 2, intermittent transmission input shaft 3 and continuous transmission input shaft 4 are all mounted on the two side plates 11-2 through bearing seats. The bearing seats are provided with set screws to restrict the axial movement of each shaft. The motor is a DC motor, which is located on the outside of the side plate 11-2 and connected to the end of the power input shaft 1 to provide power.

[0065] See Figures 1-10 The working principle of the power unit applicable to the top-mounted transplanter is as follows: The power source continuously and stably outputs power to the power input shaft 1, enabling stable rotation of the power input shaft 1. The power input shaft 1 drives the continuous transmission pulley group 5 to move, which in turn drives the continuous transmission input shaft 4 to rotate. The power from the continuous transmission input shaft 4 is transmitted through the crank-slider mechanism 8, driving the push rod group 9 to work continuously, pushing the seedlings out of the seedling tray. At the same time, the movement of the power input shaft 1 drives the grooved wheel mechanism 6 to move. Under the drive of the grooved wheel mechanism 6, the intermittent transmission output shaft 2 rotates intermittently. The intermittent transmission pulley group 7 transmits the intermittent power from the intermittent transmission output shaft 2 to the conveying mechanism 10, enabling the intermittent conveying of the seedling tray, thus achieving intermittent feeding of the seedling tray.

[0066] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A power unit suitable for a top-mounted transplanter, characterized in that, This includes a power source, a power input shaft, an intermittent transmission output shaft, an intermittent transmission input shaft, a continuous transmission input shaft, a continuous transmission pulley assembly, a Geneva mechanism, an intermittent transmission pulley assembly, a crank-slider mechanism, a push rod assembly, and a conveying mechanism; among which, The power input shaft is connected to the power source; One end of the continuous transmission pulley set is connected to the power input shaft, and the other end of the continuous transmission pulley set is connected to the continuous transmission input shaft. The continuous transmission pulley set is used to transmit power from the power input shaft to the continuous transmission input shaft. The push rod assembly is used to push the seedlings out of the seedling tray. One end of the crank-slider mechanism is connected to the continuous transmission input shaft, and the other end of the crank-slider mechanism is connected to the push rod assembly. The crank-slider mechanism is used to transmit the power from the continuous transmission input shaft to the push rod assembly. One end of the Geneva mechanism is connected to the power input shaft, and the other end of the Geneva mechanism is connected to the intermittent transmission output shaft. The Geneva mechanism is used to intermittently transmit power from the power input shaft to the intermittent transmission output shaft. One end of the intermittent transmission pulley set is connected to the intermittent transmission output shaft, and the other end of the intermittent transmission pulley set is connected to the intermittent transmission input shaft. The intermittent transmission pulley set is used to transmit the power from the intermittent transmission output shaft to the intermittent transmission input shaft. The conveying mechanism is used to convey seedling trays to realize the seedling tray feeding operation, and the intermittent transmission input shaft is connected to the conveying mechanism.

2. The power unit for a top-mounted transplanter according to claim 1, characterized in that, The Geneva mechanism includes a dial wheel mounted on the power input shaft and a Geneva wheel mounted on the intermittent transmission output shaft; the Geneva wheel and the dial wheel cooperate with each other; wherein, the Geneva wheel includes a Geneva wheel body mounted on the intermittent transmission output shaft and slots evenly distributed along the circumference on the Geneva wheel body; the dial wheel includes two impeller plates mounted on the power input shaft and a lever mounted between the impeller plates.

3. A power device suitable for a top-mounted transplanter according to claim 2, characterized in that, The grooved wheel also includes a concave locking arc disposed between two adjacent grooves, and the dial wheel also includes an arc-shaped block disposed between two impeller plates.

4. A power device suitable for a top-mounted transplanter according to claim 1, characterized in that, The power unit also includes a frame, and the power input shaft, intermittent transmission output shaft, intermittent transmission input shaft and continuous transmission input shaft are all rotatably mounted on the frame.

5. A power unit suitable for a top-mounted transplanter according to claim 1 or 4, characterized in that, The continuous transmission pulley assembly includes a continuous transmission output pulley mounted on the power input shaft and a continuous transmission input pulley mounted on the continuous transmission input shaft; the continuous transmission output pulley and the continuous transmission input pulley are connected by a continuous transmission belt.

6. A power device suitable for a top-mounted transplanter according to claim 1, characterized in that, The crank-slider mechanism includes a crank mounted on a continuous transmission input shaft and a connecting rod mounted between the crank and a push rod assembly. One end of the connecting rod is hinged to the crank, and the other end of the connecting rod is hinged to the push rod assembly.

7. A power unit suitable for a top-mounted transplanter according to claim 6, characterized in that, The push rod assembly includes a push rod frame that is slidably mounted on the frame along a straight line and a plurality of push rods mounted on the push rod frame; the plurality of push rods are evenly arranged along the length direction of the push rod frame, and the push rod frame is hinged to the connecting rod.

8. A power device suitable for a top-mounted transplanter according to claim 1, characterized in that, The intermittent transmission pulley assembly includes an intermittent transmission output pulley mounted on the intermittent transmission output shaft and an intermittent transmission input pulley mounted on the intermittent transmission input shaft; the intermittent transmission output pulley and the intermittent transmission input pulley are connected by an intermittent transmission belt.

9. A power device suitable for a top-mounted transplanter according to claim 1, characterized in that, The conveying mechanism includes two sets of opposing chain conveying assemblies and multiple conveying rods disposed between the two sets of chain conveying assemblies; each set of chain conveying assemblies includes a driving sprocket, a first driven sprocket, a second driven sprocket, and a chain; the driving sprocket, the first driven sprocket, and the second driven sprocket are arranged in a triangular pattern, and the chain meshes with the driving sprocket, the first driven sprocket, and the second driven sprocket; wherein, the driving sprocket is disposed on the intermittent transmission input shaft, one end of the conveying rod is connected to one of the chains, and the other end of the conveying rod is connected to the other chain; the multiple conveying rods are arranged along the direction of chain rotation.

10. A power device suitable for a top-mounted transplanter according to claim 9, characterized in that, The two second driven sprockets are connected by a synchronizing rod.

Images