Seedling pulling mechanism of pot seedling transplanter

Abstract

The seedling pulling mechanism of the pot seedling transplanter comprises a transfer case and two clamping jaw assemblies, each clamping jaw assembly comprises a clamping body seat, a cam shaft, a left crank arm rotating shaft and a right crank arm rotating shaft, a cam is arranged on the cam shaft, the cam shaft is rotatably installed in the clamping body seat, one end of the cam shaft extends out of the clamping body seat, and the other end of the cam shaft extends out of the right crank arm rotating shaft. The extending ends of the two cam shafts are connected through a positioning connecting rod, the left crank arm rotating shaft and the right crank arm rotating shaft are rotationally installed on the clamp body seat, and the cam shafts are connected with the positioning connecting rod through angle adjusting devices. Along with rotation of the transfer case, the two clamping jaw assemblies are sequentially opened and closed, pot seedlings moving to a seedling pulling station are rapidly pulled in a fixed-point single mode, in the pulling and transferring process of the pot seedlings, pot seedling soil is always kept downward, the seedling throwing position and the pot seedling state are kept consistent, and therefore the seedling planting efficiency and the seedling planting effect of the pot seedlings are improved; and the opening and closing time of the clamp body is convenient to adjust.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pot seedling transplanting machine technical field especially relates to a pot seedling transplanting machine seedling pulling mechanism. BACKGROUND

[0002] In the production process of agricultural crops such as vegetables, cotton and tobacco, seedling transplanting is an indispensable process, and the use of 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, while also facilitating the mechanization and automation of transplanting.

[0003] At present, the more advanced pot seedling transplanting machine for vegetables (such as peppers) in the industry adopts pneumatic seedling clamping devices, for example, Chinese invention patent CN107041191A discloses a integrated pot seedling transplanting machine pneumatic seedling taking device, which can improve the work efficiency through the pneumatic seedling taking device, but the clamping mechanism is relatively complex and has a high failure rate. For another example, Chinese invention patent CN107852919A discloses a pot seedling transplanting machine seedling taking and planting device and a method for seedling taking and planting, which realizes the work of delivering, clamping, planting and spacing of pot seedlings through the mutual operation and cooperation of the pneumatic mechanism and the controller, and the pneumatic mechanism needs a gas pump, which increases the cost.

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

[0005] Although the mechanical seedling pulling device has a low cost, it is inconvenient to adjust the opening and closing time of the clamping body, which results in early or late seedling clamping and poor use effect. There is an urgent need to improve the above-mentioned situation. INVENTION CONTENTS

[0006] Therefore, the technical problem to be solved by the utility model is to provide a pot seedling transplanting machine seedling pulling mechanism to improve the seedling transplanting efficiency and effect and reduce the cost, and facilitate the adjustment of the opening and closing time of the clamping body.

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

[0008] A seedling pulling mechanism of a pot seedling transplanting machine, comprising a distribution box and two clamping jaw assemblies, the distribution box is in transmission connection with the clamping jaw assemblies, the clamping jaw assembly comprises a clamping body seat, a cam shaft, a left elbow arm rotating shaft and a right elbow arm rotating shaft, the cam shaft is provided with a cam, the cam shaft is rotatably installed in the clamping body seat and extends out of the clamping body seat, the extending ends of the two cam shafts are connected through a positioning connecting rod, the left elbow arm rotating shaft and the right elbow arm rotating shaft are rotatably installed on the clamping body seat, outside the clamping body seat, the left elbow arm rotating shaft is fixedly connected with a left clamping body, the right elbow arm rotating shaft is fixedly connected with a right clamping body, inside the clamping body seat, the left elbow arm rotating shaft is fixedly connected with a left shift fork, the right elbow arm rotating shaft is fixedly connected with a right shift fork, the left shift fork and the right shift fork abut against cam surfaces of the cam respectively, the left clamping body and the right clamping body are controlled to open and close through the cam surfaces and a reset spring, and the cam shaft and the positioning connecting rod are connected through an angle adjusting device.

[0009] The angle adjusting device comprises an adjusting plate, the adjusting plate is fixedly connected with the cam shaft, the positioning connecting rod is sleeved on the cam shaft, and an adjusting long hole is arranged on the positioning connecting rod, when the adjusting plate is turned to a required angle, the adjusting plate and the positioning connecting rod are fixed together through a connecting member penetrating through the adjusting long hole.

[0010] The connecting member is a hinge bolt.

[0011] The cam surfaces of the cam are provided with a closed seedling clamping section, a fully open seedling throwing section and a half-open seedling taking section, a climbing surface is arranged between the closed seedling clamping section and the fully open seedling throwing section, a first descending surface is arranged between the fully open seedling throwing section and the half-open seedling taking section, and a second descending surface is arranged between the half-open seedling taking section and the closed seedling clamping section.

[0012] The cam is a disc-shaped radial cam, the left shift fork and the right shift fork are respectively provided with first protruding parts, and the first protruding parts are provided with control curved surfaces abutting against the cam surfaces.

[0013] The distribution box is installed on a transmission box, the transmission box is fixed on a machine frame, the transmission box comprises a transmission box body, a power input shaft and a seedling pulling transmission shaft are rotatably installed on the transmission box body, the power input shaft is in transmission connection with a ground wheel through a first transmission device, the power input shaft is in transmission connection with the seedling pulling transmission shaft, and the seedling pulling transmission shaft is in transmission connection with the distribution box.

[0014] The distribution box comprises a distribution box body, the distribution box body is provided with a power input port and is installed with two seedling clamping shafts, one end of the seedling clamping shaft extends out of the distribution box body, a second transmission device is arranged between the power input port and the seedling clamping shaft, and the clamping body seat is fixedly connected with the extending end of the seedling clamping shaft.

[0015] The second transmission device comprises a sun gear, two intermediate gears and two planetary gears rotatably mounted on the transfer case body respectively, the two intermediate gears are arranged on the two sides of the sun gear respectively, and the intermediate gears are engaged with the sun gear and the planetary gears respectively; the sun gear is located at the power input port and is sleeved on the seedling pulling transmission shaft, the sun gear is provided with a toothed structure at the end portion, the toothed structure is directly or indirectly embedded with the transmission case body, the seedling pulling transmission shaft is in transmission connection with the transfer case body at the power input port, and the planetary gears are fixedly connected on the seedling clamping shaft.

[0016] The reset spring is arranged outside the clamping body seat and is clamped between the left clamping body and the right clamping body.

[0017] The clamping body seat is fixed with a seedling blocking plate, and the seedling blocking plate is located at the rear of the seedling clamping part of the left clamping body and the right clamping body.

[0018] After the above technical scheme is adopted, the pot seedling transplanting machine has the following beneficial effects:

[0019] The pot seedling mechanism of the pot seedling transplanting machine disclosed in the utility model is provided with two clamping jaw assemblies, and the two clamping jaw assemblies are sequentially opened and closed along with the rotation of the transfer case, so that the pot seedling moving to the seedling pulling work position is quickly pulled and taken at a fixed point, the pot seedling soil is kept downward during the pulling and moving process, the position of seedling throwing and the state of the pot seedling are kept consistent, the seedling planting efficiency and the seedling planting effect of the pot seedling are improved, the transfer case is driven by a ground wheel, the work is reliable, and the cost is low.

[0020] In the utility model, the cam surface of the cam is provided with a closed seedling clamping section, a fully open seedling throwing section and a half-open seedling taking section, when the seedling clamping assembly is turned to the upper side of the seedling guide cylinder, the fully open seedling throwing section can make the left clamping body and the right clamping body fully open and quickly throw seedlings, the seedling throwing is smooth, the pot seedling is not easy to be inclined, the action of the duck-bill type seedling planting mechanism is matched, and the seedling planting effect is improved.

[0021] In this invention, the cam is a disc-shaped radial cam, and the first protrusion of the left and right shift forks is provided with a control arc surface. When the control arc surface abuts against the cam surface, it can generate a component force that causes the left and right crank arm shafts to rotate, thus solving the problem of controlling the rotation of the left and right crank arm shafts with a disc-shaped radial cam, and the structure is more compact.

[0022] In this utility model, a seedling baffle is fixed to the clamping seat. The seedling baffle is located behind the seedling clamping parts of the left clamping body and the right clamping body. The seedling baffle is used to cover the potted seedlings and prevent the reset spring from clamping the seedlings. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a potted seedling transplanter using the seedling pulling mechanism of this utility model;

[0024] Figure 2 yes Figure 1 A structural diagram of the seedling delivery mechanism and the seedling pulling mechanism corresponding to one row of operations;

[0025] Figure 3 yes Figure 2 A schematic diagram of the seedling delivery mechanism from another angle;

[0026] Figure 4 yes Figure 3 A schematic diagram of the seedling delivery mechanism from another angle;

[0027] Figure 5 yes Figure 2 A three-dimensional structural diagram of the seedling pulling mechanism;

[0028] Figure 6 yes Figure 5 A schematic diagram of the seedling pulling mechanism from another angle;

[0029] Figure 7 yes Figure 5 Schematic diagram of the middle gripper assembly;

[0030] Figure 8 yes Figure 7 A schematic diagram of the gripper assembly after removing the gripper seat;

[0031] Figure 9 yes Figure 8 The front view;

[0032] Figure 10 yes Figure 8 Top view;

[0033] Figure 11 yes Figure 8 A schematic diagram showing the relative positions of the middle cam and the shift fork at the climbing surface;

[0034] In the picture:

[0035] 1, rack; 11, ground wheel; 12, central transmission box; 13, covering transmission box; 14, covering device; 15, seedling tray rack;

[0036] 2, seedling feeding mechanism; 20, first support; 20A, transverse sliding rail; 20B, screw shaft; 20C, sliding sleeve; 20D, induction 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 rod; 29B, seedling tray guide disc;

[0037] 3, seedling pulling mechanism; 3A, transfer box; 3A1, transfer box body; 3A2, planetary gear; 3A3, intermediate gear; 3A4, sun gear; 3B, clamping jaw assembly; 3B1, clamping body seat; 3B2, cam shaft; 3B3A, left crank arm rotating shaft; 3B3B, right crank 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 seedling clamping section; 3B7B, fully open seedling planting section; 3B7C, half open seedling pulling section; 3C1, positioning connecting rod; 3C2, adjusting plate; 3C3, hinge bolt;

[0038] 4, seedling guide cylinder;

[0039] 5, duckbill type seedling planting mechanism;

[0040] 6, transmission box; 60, transmission box body; 61, power input shaft; 62, pot seedling transmission shaft; 63, seat cover; 64, shaft seat. DETAILED DESCRIPTION

[0041] The utility model will be further explained in connection with the drawings and examples.

[0042] As Figure 1As shown, a pot seedling transplanting machine, the frame 1 is provided with a seedling feeding mechanism 2, a seedling pulling mechanism 3 and a duckbill type seedling planting mechanism 5. The seedling pulling mechanism 3 is located downstream of the seedling feeding mechanism 2, and is used for pulling and feeding the pot seedling delivered by the seedling feeding mechanism 2 to the seedling guide cylinder 4. The duckbill type seedling planting mechanism 5 is located downstream of the seedling pulling mechanism 3, and is used for receiving the pot seedling falling from the seedling guide cylinder 4 and planting the pot seedling in the soil when it is turned to the appropriate position. The seedling guide cylinder 4 is fixed to the frame 1. The frame 1 is also provided with a seedling tray rack 15 for containing the pot seedling tray. The power of the traction device is transmitted to the central transmission box 12, and then to the soil covering transmission box 13, which drives the soil covering device 14 to rotate and press the soil 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, and the duckbill is opened at the moment when the duckbill passes the lowest point, and the pot seedling is placed in the soil. 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 described here.

[0043] As shown in Figure 2 、 Figure 3 and Figure 4 , the seedling feeding mechanism 2 comprises a longitudinal seedling feeding device and a transverse seedling feeding device.

[0044] The longitudinal seedling feeding device comprises a first support 20, which is slidingly installed on a transverse slide rail 20A fixed to the frame 1. The first support 20 is provided with a chain transmission device for longitudinally feeding the pot seedling tray. The driving shaft 21 of the chain transmission device is driven by a motor 23. One end of the driven shaft 22 of the chain transmission device is provided with a seedling feeding grating disc 25, and a plurality of notches 251 are formed in the periphery of 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 is turned to the sensing area of the first sensor 24, the first sensor 24 sends a signal to make the motor 23 stop to end one longitudinal seedling feeding. When the motor 23 is a stepping motor, the driven shaft 22 needs to be provided with a zero grating disc 25A. The first support 20 is provided with a third sensor 25B used in conjunction therewith to determine the working zero point.

[0045] The chain transmission device comprises a driving shaft 21 and a driven shaft 22, the driving shaft 21 and the driven shaft 22 are rotatably installed on the first support 20, two ends of the driving shaft 21 are respectively provided with a first driving sprocket 26 and a second driving sprocket, two ends of the driven shaft 22 are respectively provided with a first driven sprocket and a second driven sprocket, a first chain 27A is wound between the first driving sprocket 26 and the first driven sprocket, and a second chain 27B is wound between the second driving sprocket and the second driven sprocket, a plurality of disc shafts 28 are connected between the first chain 27A and the second chain 27B, and a seedling tray guide rod 29A for guiding the turning of the pot seedling tray is further installed on the first support 20. The pot seedling tray is composed of a plurality of rows of pot holes, the disc shaft 28 is clamped in the groove between the two rows of pot holes, and the disc shaft 28 drives the pot seedling tray to move, when the pot seedling tray moves to the vicinity of the driven shaft 22, the seedling tray guide rod 29A is used for guiding the turning of the pot seedling tray.

[0046] A plurality of guide discs 29B are arranged between the first driven sprocket and the second driven sprocket, and a plurality of grooves for avoiding the disc shaft 28 are arranged on the circumference of the guide disc 29B. During operation, the guide disc 29B extends into the groove between the adjacent two rows of pot holes, and is used for guiding the movement of the pot seedling tray, so that the pot seedling tray does not deviate when moving in the longitudinal direction. The guide disc 29B can be sleeved and fixed on the driven shaft 22, or a plurality of cross rods can be fixed between the first driven sprocket and the second driven sprocket, and the guide disc 29B is sleeved and fixed on the cross rod, as long as the guide disc 29B is coaxially arranged with the driven shaft 22 and synchronously rotates with the driven shaft 22.

[0047] As shown in Figure 1 and Figure 2 , the transverse seedling feeding device is in transmission connection with the transmission box 6, the transverse seedling feeding device is used for reciprocatingly moving the first support 20 along the transverse sliding rail 20A, and the transmission box 6 is fixed to the machine 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.

[0048] As shown in Figure 3 , the transverse seedling feeding device comprises a spiral shaft 20B, a sliding sleeve 20C and a finger pin (not shown in the figure), the spiral shaft 20B is rotatably installed on the machine 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 finger 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.

[0049] As shown in Figure 4As shown, the two ends of the first support 20 are respectively fixedly provided with an induction trigger 20D, the rack 1 is provided with a second sensor 20E for sensing the induction trigger 20D, the second sensor 20E is electrically connected with the electric control unit, when the induction trigger 20D moves with the first support 20 to the induction area of the second sensor 20D, the second sensor 20D sends a signal to make the motor 23 rotate to longitudinally feed the seedlings.

[0050] In summary, the seedling feeding mechanism 2 adopts the combination of electric longitudinal seedling feeding and mechanical transverse seedling feeding, and feeds the pot seedlings to the seedling pulling position one by one, thereby creating conditions for pulling seedlings at a fixed point, and the speed is fast and accurate, the operation is not prone to failure, the structure is simple, and the cost is low.

[0051] The seedling pulling mechanism 3 will be described in detail below.

[0052] As shown in Figure 5 and Figure 6 The seedling pulling mechanism 3 is installed on the transmission box 6, wherein the seedling pulling mechanism 3 is in transmission connection with the seedling pulling transmission shaft 62, and the seedling pulling mechanism mainly comprises a transfer case 3A, two clamping jaw assemblies 3B and a positioning connecting rod 3C1 connecting the two clamping jaw assemblies 3B.

[0053] The transfer case 3A comprises a transfer case body 3A1, the transfer case body 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 body 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 respectively rotatably installed on the transfer case body 3A1, the two intermediate gears 3A3 are separately arranged on the two sides of the sun gear 3A4, and the intermediate gears 3A3 are respectively in meshing connection with the sun gear 3A4 and the planetary gears 3A2; 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 toothed structure, the toothed structure is in meshing connection with an end cover 63, the end cover 63 is fixedly connected with an axle seat 64, the axle seat 64 is fixed on the transmission box body 60, the seedling pulling transmission shaft 62 is in transmission connection with the transfer case body 60 at the power input port, and the planetary gears 3A2 are fixedly connected with the seedling clamping shafts. Of course, if the end cover 63 and the axle seat 64 are regarded as a part of the transmission case body 60, the toothed structure is in meshing connection with the transmission case body 60.

[0054] As shown in Figure 5 and Figure 7As shown, the clamping jaw assembly 3B comprises: a clamping body seat 3B1 fixedly connected with the extending end of the seedling clamping shaft; a cam shaft 3B2 provided with a cam 3B7, the cam shaft 3B2 is rotatably installed in the clamping body seat 3B1 and extends out of the clamping body seat 3B1 at one end, and the extending ends of the two cam shafts 3B2 are connected with a positioning connecting rod 3C1; a left crank arm rotating shaft 3B3A and a right crank arm rotating shaft 3B3B, the left crank arm rotating shaft 3B3A and the right crank arm rotating shaft 3B3B 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 outside the clamping body seat 3B1, the right crank arm rotating shaft 3B3B is fixedly connected with a right clamping body 3B4B outside the clamping body seat 3B1, the left crank arm rotating shaft 3B3A is fixedly connected with a left shift fork 3B6A inside the clamping body seat 3B1, the right crank arm rotating shaft 3B3B is fixedly connected with a right shift fork 3B6B inside the clamping body seat 3B1, the left shift fork 3B6A and the right shift fork 3B6B abut against the cam surface of the cam 3B7 respectively, and the left clamping body 3B4A and the right clamping body 3B4B are controlled to open and close through the cam surface and a reset spring (not shown in the figure).

[0055] As shown, Figures 9-11 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 half 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 half open seedling taking section 3B7C, and a second descending surface is arranged between the half 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 for seedling planting, when the control arc surfaces 3B6A3 and 3B6B3 descend from the fully open seedling planting section 3B7B to the half open seedling taking section 3B7C through the first descending surface, the left clamping body 3B4A and the right clamping body 3B4B are half opened for seedling taking, and when the control arc surfaces 3B6A3 and 3B6B3 descend from the half 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 for seedling clamping.

[0056] In summary, the seedling pulling mechanism 3 disclosed in this utility model has a cam surface 3B7 with a closed seedling clamping section 3B7A, a fully open seedling throwing section 3B7B, and a partially open seedling retrieval section 3B7C. When the seedling clamping assembly 3B rotates above the seedling guide tube 4, the fully open seedling throwing section 3B7B allows the left clamping body 3B4A and the right clamping body 3B4B to fully open and quickly throw the seedling, ensuring smooth throwing and preventing the seedlings from tilting. This facilitates matching the movement of the duckbill-type seedling planting mechanism 5 and improves the seedling planting effect. Simultaneously, when the seedling clamping assembly 3B rotates above the seedling tray to retrieve the seedlings, the partially open seedling retrieval section 3B7C keeps the left clamping body 3B4A and the right clamping body 3B4B in a partially open state. The clamping body opening matches the width of the seedling hole, preventing the clamping body opening from accidentally clamping adjacent seedlings. The segmented design of the cam surface takes into account the needs of different working states of seedling retrieval, clamping, and throwing, improving the seedling planting effect.

[0057] Furthermore, cam 3B7 employs 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 component force is generated that causes the left crank arm shaft 3B3A and the right crank arm shaft 3B3B to rotate. This solves the problem of controlling the rotation of the left and right crank arm shafts with a disc-shaped radial cam, resulting in a more compact structure. Of course, cam 3B7 is not limited to a disc-shaped radial cam. If the compactness of the gripper assembly is not a concern, an end-face axial cam structure can also be used.

[0058] In this embodiment, in order to avoid damaging the seedlings when clamping them, flexible materials can be provided on the left clamping body 3B4A and the right clamping body 3B4B.

[0059] In this embodiment, the return spring (not shown in the figure) can be disposed outside the clamping body 3B1, for example, between the left clamping body 3B4A and the right clamping body 3B4B; or it can be disposed inside the clamping body 3B1, for example, between the second protrusion 3B6A2 of the left shift fork and the second protrusion 3B6B2 of the right shift fork. Depending on the need, the return spring can be configured as a compression spring or a tension spring.

[0060] like Figure 5 As shown, in this embodiment, the camshaft 3B2 and the positioning link 3C1 are connected by an angle adjustment device. Preferably, the angle adjustment device is an adjustment plate 3C2, which is fixedly connected to the camshaft 3B2. The positioning link is sleeved on the camshaft 3B2, and the positioning link 3C1 has an adjustment elongated hole. Rotating the adjustment plate 3C2 rotates the camshaft 3B2. When the adjustment plate 3C2 reaches the desired angle, the adjustment plate 3C2 and the positioning link 3C1 are fixed together by a connecting member passing through the adjustment elongated hole, thus facilitating the adjustment of the opening and closing timing of the clamp. The connecting member is preferably a hinge bolt 3C3, secured with a nut. The angle adjustment device is not limited to the specific mechanism described above, but also includes any technical means suitable for adjusting the relative angle between the camshaft 3B2 and the positioning link 3C1.

[0061] As Figure 7 shown, in this embodiment, the blocking seedling plate 3B5 is fixed outside the clamping body seat 3B1, the blocking seedling plate 3B5 is located at the rear of the left clamping body 3B4A and the right clamping body 3B4B seedling clamping part, and the blocking seedling plate 3B5 is used for shielding the pot seedling and preventing the reset spring from clamping the seedling.

[0062] The working principle of the pot seedling transplanting machine disclosed by the utility model is as follows:

[0063] Under the driving of the ground wheel, the transverse seedling feeding device with the spiral shaft structure makes the first support 20 reciprocate along the transverse sliding rail 20A, and the two ends of the first support 20 are respectively fixedly provided with an induction trigger 20D, and the rack 1 is provided with a second sensor 20E; when the induction trigger 20D moves to the induction area of the second sensor 20D along with the first support 20, the second sensor 20D sends a signal to make the motor 23 rotate the longitudinal seedling feeding through the electric control unit. The chain transmission device for driving the pot seedling disc to feed the seedling longitudinally 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, and the first support 20 is fixedly provided with a first sensor 24 for sensing the notches 251; when the notches 251 rotate to the induction area of the first sensor 24, the first sensor 24 sends a signal to make the motor 23 stop rotating to end the longitudinal seedling feeding once through the electric control unit. Corresponding to the seedling feeding mechanism 2, under the driving of the ground wheel 11, with the rotation of the transfer case 3A and the transverse movement of the pot seedling disc 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 quickly at the fixed point, the pot seedling soil keeps facing downward during the pulling and transferring process, the position of the seedling throwing and the state of the pot seedling are kept consistent, and therefore the seedling planting effect is improved.

[0064] In summary, the pot seedling transplanting machine disclosed by the utility model adopts mechanical seedling clamping, electric seedling feeding, two jaw assemblies for pulling out the seedling at the fixed point quickly, the speed is fast and accurate, the seedling is pulled out at the fixed point, the falling point of the seedling in the seedling guiding cylinder 4 is consistent, and the seedling planting effect is better. The utility model has the advantages of simple structure, low production cost, no easy fault during operation, and wide application in vegetables, cotton, tobacco and other dry land crops.

[0065] 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 rice 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 pulling mechanism of a pot seedling transplanting machine, comprising: a transfer case and two gripper assemblies, the transfer case being in driving connection with the gripper assemblies; characterized in that the gripper assembly comprises a gripper seat, cam shafts, a left elbow shaft and a right elbow shaft, the cam shafts being provided with cams, the cam shafts being rotatably installed in the gripper seat and having one end extending out of the gripper seat, the extending ends of the two cam shafts being connected by a positioning connecting rod, the left elbow shaft and the right elbow shaft being rotatably installed on the gripper seat, the left elbow shaft being fixedly connected with a left gripper outside the gripper seat, the right elbow shaft being fixedly connected with a right gripper outside the gripper seat, the left elbow shaft being fixedly connected with a left shift fork inside the gripper seat, the right elbow shaft being fixedly connected with a right shift fork inside the gripper seat, the left shift fork and the right shift fork abutting against cam surfaces of the cams respectively, the left gripper and the right gripper being controlled to open and close by the cam surfaces and a return spring; the cam shafts and the positioning connecting rod are connected by an angle adjusting device.

2. The plug transplanter seedling pulling mechanism of claim 1, wherein, the angle adjusting device comprises an adjusting plate, the adjusting plate being fixedly connected with the cam shafts, the positioning connecting rod being sleeved on the cam shafts, the positioning connecting rod being provided with an adjusting long hole, the adjusting plate and the positioning connecting rod being fixed together by a connecting member passing through the adjusting long hole when the adjusting plate is turned to a required angle.

3. The plug transplanting machine seedling pulling mechanism of claim 2, wherein, the connecting member is a universal bolt.

4. The plug transplanter seedling pulling mechanism of claim 1, wherein the cam surfaces of the cams are provided with a closed seedling clamping section, a fully open seedling throwing section and a half open seedling pulling section, a climbing surface being arranged between the closed seedling clamping section and the fully open seedling throwing section, a first descending surface being arranged between the fully open seedling throwing section and the half open seedling pulling section, and a second descending surface being arranged between the half open seedling pulling section and the closed seedling clamping section.

5. The plug transplanter seedling pulling mechanism of claim 4, wherein the cams are disc-shaped radial cams, the left shift fork and the right shift fork being respectively provided with first protruding parts provided with control curved surfaces abutting against the cam surfaces.

6. The plug transplanter seedling pulling mechanism of claim 1, wherein the transfer case is installed on a transmission case, the transmission case being fixed on a frame, the transmission case comprising a transmission case body, the transmission case body being rotatably installed with a power input shaft and a seedling pulling transmission shaft, the power input shaft being in driving connection with a ground wheel through a first transmission device, the power input shaft being in driving connection with the seedling pulling transmission shaft, and the seedling pulling transmission shaft being in driving connection with the transfer case.

7. The plug transplanter seedling pulling mechanism of claim 6, wherein the transfer case comprises a transfer case body, the transfer case body being provided with one power input port and being installed with two seedling clamping shafts, one end of the seedling clamping shafts extending out of the transfer case body, the power input port and the seedling clamping shafts being provided with a second transmission device therebetween, and the gripper seat being fixedly connected with the extending ends of the seedling clamping shafts.

8. The plug transplanter emergence mechanism of claim 7, wherein, The second transmission device comprises a sun gear, two intermediate gears and two planetary gears rotatably mounted on the transfer box body respectively, the two intermediate gears are arranged on the two sides of the sun gear respectively, and the intermediate gears are engaged with the sun gear and the planetary gears respectively; the sun gear is located at the power input port and is sleeved on the seedling pulling transmission shaft, the sun gear is provided with a toothed structure at the end, the toothed structure is directly or indirectly engaged with the transmission box body, the seedling pulling transmission shaft is in transmission connection with the transfer box body at the power input port, and the planetary gears are fixedly connected on the seedling clamping shaft.

9. The plug transplanting machine seedling pulling mechanism of claim 1, wherein, The reset spring is arranged outside the clamping body seat and is clamped between the left clamping body and the right clamping body.

10. The plug transplanter seedling pulling mechanism of claim 9, wherein, The clamping body seat is fixed with a seedling blocking plate, and the seedling blocking plate is located at the rear of the seedling clamping part of the left clamping body and the right clamping body.

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