Seedling feeding mechanism of pot seedling transplanter

Abstract

The utility model discloses a pot seedling transplanter seedling feeding mechanism which comprises a longitudinal seedling feeding device and a transverse seedling feeding device, the longitudinal seedling feeding device is driven by a motor and provided with a seedling feeding grating disc, a plurality of notches are formed in the periphery of the seedling feeding grating disc, and a first sensor used for sensing the notches is fixed to a first support; the two ends of the first support are each fixedly provided with an induction triggering piece, and the rack is provided with a second sensor used for sensing the induction triggering pieces. According to the utility model, a mode of combining electric longitudinal seedling conveying and mechanical transverse seedling conveying is adopted, pot seedlings are conveyed to a seedling pulling station one by one, conditions are created for pulling single seedlings at a fixed point, the speed is high, the accuracy is high, faults are not easy to occur during operation, the structure is simple, and the cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to the pot seedling transplanting machine technical field especially relates to a kind of seedling sending mechanism of pot seedling transplanting machine. BACKGROUND

[0002] In the production process of agricultural crops such as vegetables, cotton and tobacco, seedling transplanting is an indispensable process. Using seedling transplanting technology can increase the yield per mu of crops, improve the ability to resist pests, drought and salinity, and shorten the growth period of crops. It also facilitates the mechanization and automation of transplanting.

[0003] Currently, the more advanced pot seedling transplanting machine for vegetables (such as peppers) in the industry uses pneumatic seedling clamping devices. For example, Chinese invention patent CN107041191A discloses a pneumatic seedling taking device for integrated pot seedling transplanting machine. Although it can improve work efficiency through the pneumatic seedling taking device, the clamping mechanism is relatively complex and has a high failure rate. Another example is Chinese invention patent CN107852919A, which discloses a seedling taking and planting device for pot seedling transplanting machine and a method for seedling taking and planting. The device achieves the work of delivering, clamping, planting and spacing pot seedlings through the mutual operation and cooperation of the pneumatic mechanism and the controller. The pneumatic mechanism requires a gas pump, increasing the cost.

[0004] In rice pot seedling transplanting, similar situations also exist.

[0005] Although mechanical seedling sending devices have low cost, they have complex structure and slow response, making it difficult to adapt to the rapid transplanting of pot seedlings. Therefore, there is an urgent need to improve this situation in the industry. SUMMARY

[0006] Therefore, the technical problem to be solved by the utility model is to provide a seedling sending mechanism for pot seedling transplanting machine to adapt to the rapid transplanting of pot seedlings. The seedling sending mechanism is fast and accurate, less likely to malfunction during operation, simple in structure and low in cost.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] The pot seedling transplanting machine seedling feeding mechanism comprises a longitudinal seedling feeding device and a transverse seedling feeding device; the longitudinal seedling feeding device comprises a first support which is slidingly installed on a transverse sliding rail fixed to a machine frame, a chain transmission device for longitudinally feeding a pot seedling tray is installed on the first support, a driving shaft of the chain transmission device is driven by a motor, a seedling feeding grating disc is arranged at one end of a driven shaft of the chain transmission device, a plurality of notches are formed in the periphery of the seedling feeding grating disc, a first sensor for sensing the notches is fixed to the first support, and the first sensor is electrically connected with an electric control unit for controlling the rotation or stop of the motor; the transverse seedling feeding device is used for reciprocatingly moving the first support along the transverse sliding rail, and inductive trigger members are respectively arranged at both ends of the first support, a second sensor for sensing the inductive trigger members is arranged on the machine frame, and the second sensor is electrically connected with the electric control unit.

[0009] The transverse seedling feeding device comprises a spiral shaft, a sliding sleeve and a finger pin, the spiral shaft is rotationally installed on the machine frame and is provided with a bidirectional spiral groove, the sliding sleeve is sleeved on the spiral shaft and is fixed to the first support, and the finger pin is fixed to the sliding sleeve and extends into the bidirectional spiral groove.

[0010] The chain transmission device comprises the driving shaft and the driven shaft, the driving shaft and the driven shaft are rotationally installed on the first support, first and second driving sprockets are arranged at both ends of the driving shaft, first and second driven sprockets are arranged at both ends of the driven shaft, a first chain is wound between the first driving sprocket and the first driven sprocket, a second chain is wound between the second driving sprocket and the second driven sprocket, and a dial lever is connected between the first chain and the second chain.

[0011] The first support is provided with a seedling tray guide lever for guiding the overturning of the pot seedling tray.

[0012] A plurality of guide discs for guiding the movement of the pot seedling tray are arranged between the first driven sprocket and the second driven sprocket, the guide discs are coaxially arranged with the driven shaft and synchronously rotate with the driven shaft, and grooves for avoiding the dial lever are arrayed on the periphery of the guide discs.

[0013] The spiral shaft is drivingly connected with a transmission box fixed to the machine frame.

[0014] The transmission box is drivingly connected with ground wheels of the pot seedling transplanting machine through a first transmission device.

[0015] The motor is a stepping motor, a zero grating disc is arranged at one end of the driven shaft, and a third sensor matched with the zero grating disc is arranged on the first support.

[0016] The beneficial effects of the present application are as follows:

[0017] The seedling feeding mechanism comprises a longitudinal seedling feeding device and a transverse seedling feeding device, and under the driving of the ground wheel, the transverse seedling feeding device enables the first support to reciprocate along the transverse slide rail, the two ends of the first support are respectively fixedly provided with an inductive trigger, the rack is provided with a second sensor, when the inductive trigger moves to the inductive area of the second sensor with the first support, the second sensor sends a signal to the motor to rotate and longitudinally feed the seedling through the electric control unit, the first support is provided with a chain transmission device for driving the pot seedling tray to longitudinally feed the seedling, the driving shaft of the chain transmission device is driven by the motor, one end of the driven shaft of the chain transmission device is provided with a seedling feeding grating disc, a plurality of notches are formed in the periphery of the seedling feeding grating disc, the first support is fixedly provided with a first sensor for sensing the notches, when the notches rotate to the inductive area of the first sensor, the first sensor sends a signal to the motor to stop rotating and end the longitudinal seedling feeding through the electric control unit.

[0018] In the present application, a plurality of guide discs are arranged between the first driven sprocket and the second driven sprocket, during operation, the guide discs extend into the grooves between the adjacent two rows of pot holes to guide the movement of the pot seedling tray, so that the pot seedling tray does not deviate during longitudinal movement.

[0019] In the present application, the first support is provided with a seedling tray guide rod for guiding the overturning of the pot seedling tray, when the pot seedling tray moves to the vicinity of the driven shaft, the seedling tray guide rod is used for guiding the overturning of the pot seedling tray.

[0020] In the present application, a zero grating disc is arranged on the driven shaft, and the first support is provided with a third sensor used in conjunction therewith, when the motor is a stepping motor, the zero grating disc is used to determine the working zero point.

[0021] In summary, the seedling feeding mechanism of the pot seedling transplanting machine disclosed in the present application adopts the combination of electric longitudinal seedling feeding and mechanical transverse seedling feeding, and the pot seedling is fed to the seedling pulling position one by one, which creates conditions for pulling seedlings one by one at a fixed point, has high speed and high accuracy, is not prone to failure during operation, has simple structure and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective structural schematic view of a pot seedling transplanting machine embodiment adopting the seedling feeding mechanism of the present application;

[0023] Figure 2 is Figure 1Structure diagram of seedling feeding mechanism and seedling pulling mechanism corresponding to one row of work;

[0024] Figure 3 is Figure 2 Structure diagram of seedling feeding mechanism from another angle;

[0025] Figure 4 is Figure 3 Structure diagram of seedling feeding mechanism from another angle;

[0026] Figure 5 is Figure 2 Structure diagram of seedling pulling mechanism from another angle;

[0027] Figure 6 is Figure 5 Structure diagram of seedling pulling mechanism from another angle;

[0028] Figure 7 is Figure 5 Structure diagram of clamping jaw assembly;

[0029] Figure 8 is Figure 7 Structure diagram of clamping jaw assembly after removing clamping body seat;

[0030] Figure 9 is Figure 8 Front view;

[0031] Figure 10 is Figure 8 Top view;

[0032] Figure 11 is Figure 8 Structure diagram of relative position relationship between cam and shift fork at climbing surface;

[0033] In the figure:

[0034] 1, frame; 11, ground wheel; 12, central transmission box; 13, covering soil transmission box; 14, covering soil device; 15, seedling tray frame;

[0035] 2, seedling feeding mechanism; 20, first support; 20A, transverse sliding rail; 20B, spiral shaft; 20C, sliding sleeve; 20D, inductive trigger; 20E, second sensor; 21, driving shaft; 22, driven shaft; 23, motor; 24, first sensor; 25, seedling feeding grating disc; 251, notch; 25A, zero grating disc; 25B, third sensor; 26, first driving sprocket; 27A, first chain; 27B, second chain; 28, dial lever; 29A, seedling tray guide lever; 29B, seedling tray guide disc;

[0036] 3, seedling pulling mechanism; 3A, transfer case; 3A1, transfer case body; 3A2, planetary gear; 3A3, intermediate gear; 3A4, sun gear; 3B, clamping jaw assembly; 3B1, clamping body seat; 3B2, cam shaft; 3B3A, left elbow arm rotating shaft; 3B3B, right elbow arm rotating shaft; 3B4A, left clamping body; 3B4B, right clamping body; 3B5, baffle; 3B6A, left shift fork; 3B6A1, first protruding part; 3B6A2, second protruding part; 3B6A3, control cam surface; 3B6B, right shift fork; 3B6B1, first protruding part; 3B6B2, second protruding part; 3B6B3, control cam surface; 3B7, cam; 3B7A, closing clamping seedling section; 3B7B, fully open seedling planting section; 3B7C, half open seedling pulling section; 3C1, positioning connecting rod; 3C2, adjusting plate; 3C3, hinge bolt;

[0037] 4, seedling guiding cylinder;

[0038] 5, duckbill type seedling planting mechanism;

[0039] 6, transmission case; 60, transmission case body; 61, power input shaft; 62, pot seedling transmission shaft; 63, seat cover; 64, shaft seat. DETAILED DESCRIPTION

[0040] The utility model will be further explained in connection with the drawings and examples.

[0041] As shown in the drawings, Figure 1 A pot seedling transplanting machine, a seedling feeding mechanism 2, a seedling pulling mechanism 3 and a duckbill type seedling planting mechanism 5 are installed on the frame 1, the seedling pulling mechanism 3 is located at the downstream position of the seedling feeding mechanism 2, is used for fixed-point single-pull seedling feeding mechanism 2 transmission pot seedling and throw into the seedling guiding cylinder 4, the duckbill type seedling planting mechanism 5 is located at the downstream position of the seedling pulling mechanism 3, is used for receiving the pot seedling from the seedling guiding cylinder 4 and planting the pot seedling in the soil when turning to the appropriate position, the seedling guiding cylinder 4 is fixed to the frame 1. A seedling tray rack 15 for containing pot seedling trays is also installed on the frame 1, the power of the traction device is transmitted to the central transmission case 12, and then the power is transmitted to the covering soil transmission case 13, the covering soil transmission case 13 drives the covering soil device 14 to rotate, and the soil is pressed on the plastic film. The duckbill of the duckbill type seedling planting mechanism is inserted into the soil 7-8 cm at the lowest point, the duckbill is opened instantly when it passes the lowest point, the pot seedling is placed in the soil, and then the seedling soil is cultivated by the soil cultivating device. The specific structure and working principle of the duckbill type seedling planting mechanism are known, and will not be repeated here.

[0042] As shown in the drawings, Figure 2 , Figure 3 and Figure 4 The seedling feeding mechanism 2 includes longitudinal seedling feeding device and transverse seedling feeding device.

[0043] The longitudinal seedling feeding device comprises a first support 20 which is slidingly installed on a transverse sliding rail 20A fixed to the frame 1, a chain transmission device for feeding the seedling pots longitudinally is installed on the first support 20, a driving shaft 21 of the chain transmission device is driven by a motor 23, a seedling feeding grating disc 25 is arranged at one end of a driven shaft 22 of the chain transmission device, a plurality of notches 251 are arranged around the seedling feeding grating disc 25, the first support 20 is fixed with a first sensor 24 for sensing the notches 251, the first sensor 24 is electrically connected with an electric control unit for controlling the rotation or stop of the motor 23, when the notch 251 rotates to the sensing area of the first sensor 24, the first sensor 24 sends a signal to make the motor 23 stop to end the longitudinal seedling feeding once.

[0044] The chain transmission device comprises the driving shaft 21 and the driven shaft 22 which are rotatably installed on the first support 20, the two ends of the driving shaft 21 are respectively provided with a first driving sprocket 26 and a second driving sprocket, the two ends of the driven shaft 22 are respectively provided with a first driven sprocket and a second driven sprocket, the first driving sprocket 26 and the first driven sprocket are wound with a first chain 27A, the second driving sprocket and the second driven sprocket are wound with a second chain 27B, a plurality of dial levers 28 are connected between the first chain 27A and the second chain 27B, the first support 20 is further provided with a seedling pot guide lever 29A for guiding the overturning of the seedling pot.

[0045] A plurality of guide discs 29B are arranged between the first driven sprocket and the second driven sprocket, a plurality of grooves for avoiding the dial levers 28 are arranged on the circumference of the guide discs 29B. During operation, the guide discs 29B are inserted into the slots between the adjacent two rows of pot holes for guiding the movement of the seedling pot, so that the seedling pot does not deviate during the longitudinal movement. The guide discs 29B can be sleeved and fixed on the driven shaft 22, or a plurality of horizontal levers are fixed between the first driven sprocket and the second driven sprocket, the guide discs 29B are sleeved and fixed on the horizontal levers, as long as the guide discs 29B are coaxially arranged with the driven shaft 22 and synchronously rotate with the driven shaft 22.

[0046] As Figure 1 And Figure 2As shown in the drawings, the transverse seedling feeding device is in transmission connection with the transmission box 6, the transverse seedling feeding device is used for reciprocating moving the first support 20 along the transverse slide rail 20A, the transmission box 6 is fixed to the frame 1 and is in transmission connection with the ground wheel 11 through the first transmission device. The transmission box 6 comprises a transmission box body 61, the transmission box body 61 is provided with a power input shaft 61 and a seedling pulling transmission shaft 62, specifically, the power input shaft 61 is in transmission connection with the ground wheel 11 through the first transmission device, the power input shaft 61 is in transmission connection with the seedling pulling transmission shaft 62, and the power input shaft 61 is in transmission connection with the transverse seedling feeding device.

[0047] As shown in the drawings, Figure 3 The transverse seedling feeding device comprises a spiral shaft 20B, a sliding sleeve 20C and a pin (not shown in the drawings), the spiral shaft 20B is rotatably installed on the frame 1 and is provided with a bidirectional spiral groove, the sliding sleeve 20C is sleeved on the spiral shaft 20B and is fixed to the first support 20, the pin is fixed to the sliding sleeve 20C and extends into the bidirectional spiral groove, and the spiral shaft 20B is in transmission connection with the power input shaft 61.

[0048] As shown in the drawings, Figure 4 Both ends of the first support 20 are respectively fixedly provided with an inductive trigger 20D, the frame 1 is provided with a second sensor 20E for sensing the inductive trigger 20D, the second sensor 20E is in electrical connection with the electric control unit, when the inductive trigger 20D moves to the sensing area of the second sensor 20D along with the first support 20, the second sensor 20D sends a signal for making the motor 23 rotate the longitudinal seedling feeding.

[0049] In summary, the seedling feeding mechanism 2 adopts the mode of combining electric longitudinal seedling feeding and mechanical transverse seedling feeding, the pot seedlings are fed to the seedling pulling station one by one, conditions are created for picking seedlings at a fixed point, the speed is fast and accurate, the operation is not prone to failure, the structure is simple, and the cost is low.

[0050] The seedling pulling mechanism 3 is described in detail below.

[0051] As shown in the drawings, Figure 5 And Figure 6 The seedling pulling mechanism 3 is in transmission connection with the seedling pulling transmission shaft 62, and mainly comprises a sub-transmission box 3A, two clamping jaw assemblies 3B and a positioning connecting rod 3C1 connecting the two clamping jaw assemblies 3B.

[0052] The transfer case 3A comprises a transfer case housing 3A1, the transfer case housing 3A1 is provided with a power input port and is installed with two seedling clamping shafts, one end of the seedling clamping shafts extends out of the transfer case housing 3A1, a second transmission device is arranged between the power input port and the seedling clamping shafts, the second transmission device comprises a sun gear 3A4, two intermediate gears 3A3 and two planetary gears 3A2 which are rotatably installed on the transfer case housing 3A1 respectively, the two intermediate gears 3A3 are arranged on the two sides of the sun gear 3A4 respectively, and the intermediate gears 3A3 are in meshing connection with the sun gear 3A4 and the planetary gears 3A2 respectively; the sun gear 3A4 is located at the power input port and is sleeved on the seedling pulling transmission shaft 62, the end of the sun gear 3A4 is provided with a toothing structure, the toothing structure is in meshing connection with the end cover 63, the end cover 63 is fixedly connected with the shaft seat 64, the shaft seat 64 is fixed on the transmission case housing 60, the seedling pulling transmission shaft 62 is in transmission connection with the transfer case housing 60 at the power input port, and the planetary gears 3A2 are fixedly connected on the seedling clamping shafts. Of course, if the end cover 63 and the shaft seat 64 are regarded as a part of the transmission case housing 60, the toothing structure is in meshing connection with the transmission case housing 60.

[0053] As shown in Figure 5 and Figure 7 , the clamping jaw assembly 3B comprises a clamping body seat 3B1 which is fixedly connected with the extending end of the seedling clamping shaft, a cam shaft 3B2 which is provided with a cam 3B7, the cam shaft 3B2 is rotatably installed in the clamping body seat 3B1 and one end of the cam shaft 3B2 extends out of the clamping body seat 3B1, a positioning connecting rod 3C1 is connected between the extending ends of the two cam shafts 3B2, a left crank arm rotating shaft 3B3A and a right crank arm rotating shaft 3B3B which are rotatably installed on the clamping body seat 3B1, the left crank arm rotating shaft 3B3A is fixedly connected with a left clamping body 3B4A, the right crank arm rotating shaft 3B3B is fixedly connected with a right clamping body 3B4B, the left crank arm rotating shaft 3B3A is fixedly connected with a left shift fork 3B6A, and the right crank arm rotating shaft 3B3B is fixedly connected with a right shift fork 3B6B in the clamping body seat 3B1, the left shift fork 3B6A and the right shift fork 3B6B abut against the cam surfaces of the cam 3B7 respectively, and the opening and closing of the left clamping body 3B4A and the right clamping body 3B4B are controlled by the cam surfaces and a reset spring (not shown in the figure).

[0054] As shown in Figures 9-11As shown, the cam 3B7 is a disc-shaped radial cam, the cam surface of the cam 3B7 is provided with a closed seedling clamping section 3B7A, a fully open seedling planting section 3B7B and a semi-open seedling taking section 3B7C, a climbing surface is arranged between the closed seedling clamping section 3B7A and the fully open seedling planting section 3B7B, a first descending surface is arranged between the fully open seedling planting section 3B7B and the semi-open seedling taking section 3B7C, a second descending surface is arranged between the semi-open seedling taking section 3B7C and the closed seedling clamping section 3B7A, the left shift fork 3B6A is provided with a first protruding part 3B6A1 and a second protruding part 3B6A2, the first protruding part 3B6A1 is provided with a control arc surface 3B6A3, the right shift fork 3B6B is provided with a first protruding part 3B6B1 and a second protruding part 3B6B2, the first protruding part 3B6B1 is provided with a control arc surface 3B6B3, when the control arc surfaces 3B6A3 and 3B6B3 climb from the closed seedling clamping section 3B7A to the fully open seedling planting section 3B7B through the climbing surface, the left clamping body 3B4A and the right clamping body 3B4B are fully opened to plant seedlings, when the control arc surfaces 3B6A3 and 3B6B3 descend from the fully open seedling planting section 3B7B to the semi-open seedling taking section 3B7C through the first descending surface, the left clamping body 3B4A and the right clamping body 3B4B are semi-opened to take seedlings, when the control arc surfaces 3B6A3 and 3B6B3 descend from the semi-open seedling taking section 3B7C to the closed seedling clamping section 3B7A through the second descending surface, the left clamping body 3B4A and the right clamping body 3B4B are closed to clamp seedlings.

[0055] In summary, the disclosed seedling pulling mechanism 3, the cam surface of the cam 3B7 is provided with a closed seedling clamping section 3B7A, a fully open seedling planting section 3B7B and a semi-open seedling taking section 3B7C, when the seedling clamping assembly 3B is turned to the upper side of the seedling guiding cylinder 4, the fully open seedling planting section 3B7B can make the left clamping body 3B4A and the right clamping body 3B4B fully open and quickly plant seedlings, which is smooth and makes the pot seedlings not easy to be inclined, which is beneficial to match the action of the duck-bill type seedling planting mechanism 5 and improve the planting effect. At the same time, when the seedling clamping assembly 3B is turned to the upper side of the pot seedling disc to take seedlings, the semi-open seedling taking section 3B7C makes the left clamping body 3B4A and the right clamping body 3B4B in a semi-open state, the clamping body opening is matched with the width of the pot hole, so that the adjacent pot seedlings are not clamped by mistake due to the too large clamping body opening. The segmented setting of the cam surface takes into account the needs of seedling taking, seedling clamping and seedling planting in different working states, and improves the seedling planting effect.

[0056] In addition, the cam 3B7 adopts a disc-shaped radial cam, when the control arc surfaces 3B6A3 and 3B6B3 of the left and right shift forks abut against the cam surface, a force can be generated to make the left crank arm rotating shaft 3B3A and the right crank arm rotating shaft 3B3B rotate, which solves the problem of controlling the rotation of the left and right crank arm rotating shafts by the disc-shaped radial cam, and the structure is more compact. Of course, the cam 3B7 is not limited to a disc-shaped radial cam, if the compactness of the clamping jaw assembly is not considered, an end face axial cam structure can also be adopted.

[0057] In this embodiment, in order not to hurt seedlings when clamping seedlings, flexible materials can be arranged on the left clamping body 3B4A and the right clamping body 3B4B.

[0058] In this embodiment, the reset spring (not shown in the figure) can be arranged outside the clamping body seat 3B1, for example, between the left clamping body 3B4A and the right clamping body 3B4B; or arranged inside the clamping body seat 3B1, for example, between the second protruding part 3B6A2 of the left fork and the second protruding part 3B6B2 of the right fork. According to needs, the reset spring can be arranged as a compression spring or a tension spring.

[0059] As shown in Figure 5 In this embodiment, the camshaft 3B2 is connected with the positioning connecting rod 3C1 through an angle adjusting device, and the angle adjusting device of this embodiment is preferably an adjusting plate 3C2. The adjusting plate 3C2 is fixedly connected with the camshaft 3B2, the positioning connecting rod is sleeved on the camshaft 3B2, the positioning connecting rod 3C1 is provided with an adjusting long hole, and the adjusting plate 3C3 is rotated, that is, the camshaft 3B2 is rotated. When the adjusting plate 3C2 is rotated to the required angle, the adjusting plate 3C2 and the positioning connecting rod 3C1 are fixed together through a connecting member passing through the adjusting long hole, so that it is more convenient to adjust the opening and closing time of the clamping body. The connecting member is preferably a hinge bolt 3C3, and is fixed by a nut. The angle adjusting device is not limited to the above specific mechanism, and also includes all technical means suitable for relative angle adjustment of the camshaft 3B2 and the positioning connecting rod 3C1.

[0060] As shown in Figure 7 In this embodiment, a seedling blocking plate 3B5 is fixed outside the clamping body seat 3B1, and the seedling blocking plate 3B5 is located at the rear of the seedling clamping part of the left clamping body 3B4A and the right clamping body 3B4B. The seedling blocking plate 3B5 is used to block the pot seedlings and prevent the reset spring from clamping the seedlings.

[0061] The working principle of the pot seedling transplanting machine disclosed by the utility model is as follows:

[0062] Under the drive of the ground wheel, the transverse seedling feeding device of the screw shaft structure makes the first support 20 reciprocate along the transverse slide rail 20A, and the two ends of the first support 20 are respectively fixedly provided with an inductive trigger 20D, and the rack 1 is provided with a second sensor 20E; when the inductive trigger 20D moves to the inductive area of the second sensor 20D along with the first support 20, the second sensor 20E sends a signal for making the motor 23 rotate the longitudinal seedling feeding through the electric control unit. The chain transmission device for driving the longitudinal seedling feeding of the pot seedling tray is installed on the first support 20, the driving shaft 21 of the chain transmission device is driven by the motor 23, one end of the driven shaft 22 of the chain transmission device is provided with a seedling feeding grating disc 25, a plurality of notches 251 are formed in the circumference of the seedling feeding grating disc 25, the first support 20 is fixedly provided with a first sensor 24 for sensing the notches 251, and when the notches 251 rotate to the inductive area of the first sensor 24, the first sensor 24 sends a signal for making the motor 23 stop rotating to end the longitudinal seedling feeding through the electric control unit. Corresponding to the seedling feeding mechanism 2, under the drive of the ground wheel 11, with the rotation of the transfer case 3A and the transverse movement of the pot seedling tray on the first support 20, the two jaw assemblies 3B are sequentially opened and closed, the pot seedling moving to the seedling pulling position is pulled out in a fixed point and fast speed, the pot seedling soil is kept downward during the pulling and transferring process, the seedling throwing position and the state of the pot seedling are kept consistent, and therefore the pot seedling planting effect is improved.

[0063] In summary, the pot seedling transplanting machine disclosed by the utility model adopts mechanical seedling pulling, electric seedling feeding, two jaw assemblies for pulling seedlings in a fixed point and fast speed, fast and accurate speed, fixed point and single seedling pulling, consistent falling points of seedlings in the seedling guide cylinder 4, and better planting effect. The utility model has simple structure, low production cost, is not prone to faults during operation, and can be widely applied to vegetables, cotton, tobacco and other dry land crops.

[0064] The utility model is not limited to the above-mentioned embodiments, the above-mentioned seedling feeding mechanism and / or seedling pulling mechanism are combined with the seedling planting mechanism suitable for paddy field operation, and a paddy pot seedling transplanting machine can also be formed. All kinds of improvements based on the concept, principle, structure and method of the utility model will fall within the protection scope of the utility model.

Claims

1. A seedling conveying mechanism of a pot seedling transplanting machine, comprising: a longitudinal seedling conveying device and a transverse seedling conveying device; characterized in that the longitudinal seedling conveying device comprises a first support slidably mounted on a transverse slide rail fixed to a machine frame, a chain transmission device for longitudinally conveying a pot seedling tray is mounted on the first support, a driving shaft of the chain transmission device is driven by a motor, a driven shaft of the chain transmission device is provided at one end with a seedling conveying grating disc, a plurality of notches are formed in a periphery of the seedling conveying grating disc, the first support is fixed with a first sensor for sensing the notches, and the first sensor is electrically connected with an electric control unit for controlling rotation or stop of the motor. The transverse seedling conveying device is used for reciprocating movement of the first support along the transverse slide rail, and the first support is respectively fixed at both ends with an inductive trigger, the machine frame is provided with a second sensor for sensing the inductive trigger, and the second sensor is electrically connected with the electric control unit. The transverse seedling conveying device comprises a screw shaft, a sliding sleeve and a finger pin, the screw shaft is rotatably mounted on the machine frame and provided with a bidirectional screw groove, the sliding sleeve is sleeved on the screw shaft and fixed to the first support, and the finger pin is fixed to the sliding sleeve and extends into the bidirectional screw groove. The chain transmission device comprises the driving shaft and the driven shaft, the driving shaft and the driven shaft are rotatably mounted on the first support, both ends of the driving shaft are respectively provided with a first driving sprocket and a second driving sprocket, both ends of the driven shaft are respectively provided with a first driven sprocket and a second driven sprocket, a first chain is wound between the first driving sprocket and the first driven sprocket, a second chain is wound between the second driving sprocket and the second driven sprocket, and a dial lever is connected between the first chain and the second chain.

2. The pot seedling transplanting machine seedling feeding mechanism according to claim 1, wherein The first support is mounted with a seedling tray guide lever for guiding overturning of the pot seedling tray.

3. The pot seedling transplanting machine seedling feeding mechanism according to claim 2, wherein A plurality of guide discs for guiding movement of the pot seedling tray are arranged between the first driven sprocket and the second driven sprocket, the guide discs are coaxially arranged with the driven shaft and synchronously rotate with the driven shaft, and grooves for avoiding the dial lever are arrayed on a periphery of the guide discs.

4. The pot seedling transplanting machine seedling feeding mechanism according to claim 3, wherein The screw shaft is drivingly connected with a transmission box fixed to the machine frame.

5. The pot seedling transplanting machine seedling feeding mechanism according to claim 3, wherein The transmission box is drivingly connected with ground wheels of the pot seedling transplanting machine through a first transmission device.

6. The pot seedling transplanting machine seedling feeding mechanism according to claim 3, wherein The motor is a stepping motor, one end of the driven shaft is provided with a zero grating disc, and the first support is provided with a third sensor matched with the zero grating disc.

7. The pot seedling transplanting machine seedling feeding mechanism according to claim 6, wherein ​ 8. The pot seedling transplanting machine seedling feeding mechanism according to claim 1, wherein ​

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