Logistics conveying device for greenhouse floating seedling trays

Abstract

The invention discloses a logistics conveying device for greenhouse floating seedling trays. The logistics conveying device comprises a ground conveying system and a crown block system. The crown block system internally comprises a crown block moving device arranged around the top face of the greenhouse, a crown block lifting device is arranged on the crown block moving device, the lower end of the crown block lifting device is connected with a crown block rotating push-out device, and a crown block tail end executing device is arranged on the crown block rotating push-out device. The ground transportation system comprises a ground rail which is arranged on the ground of the greenhouse and is opposite to the crown block moving device; and a ground transport vehicle is arranged on the ground track. The floating seedling tray carrying device can automatically carry floating seedling trays, and has the advantages that automatic operation is achieved, and the effects of being efficient, reliable, high in productivity and capable of reducing labor cost are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automated logistics systems for greenhouse greenhouses, and particularly to a logistics conveying device for greenhouse floating seedling trays. Background Art

[0002] Chinese Patent Publication No. CN106688860 A discloses a double-link pushing device for multi-pool floating seedling trays. This device can push the floating seedling trays to one side of the pool so that the floating seedling trays can wait for transportation. Therefore, how to design a device that can be used in cooperation with this device to automatically transport the hydroponic floating seedling trays has become a technical problem that the applicant urgently needs to solve. Summary of the Invention

[0003] The purpose of the present invention is to provide a logistics conveying device for greenhouse floating seedling trays. The present invention can achieve automatic handling of floating seedling trays, and the advantages are to realize automated operation, achieving the effects of high efficiency, reliability, high productivity, and reducing labor costs.

[0004] The technical solution of the present invention: A logistics conveying device for greenhouse floating seedling trays includes a ground transportation system and an overhead crane system; the overhead crane system includes an overhead crane moving device arranged around the top surface of the greenhouse, an overhead crane lifting device is provided on the overhead crane moving device, the lower end of the overhead crane lifting device is connected to an overhead crane rotating and pushing device, and an overhead crane end effector is provided on the overhead crane rotating and pushing device; the ground transportation system includes a ground track arranged on the ground of the greenhouse and opposite to the overhead crane moving device; a ground transport vehicle is provided on the ground track.

[0005] For the above-mentioned logistics conveying device for greenhouse floating seedling trays, the ground transport vehicle includes a vehicle frame arranged on the ground track. The vehicle frame is of a multi-layer structure, and each layer is provided with multiple pulley roller bars. Cultivation plates are placed between the pulley roller bars of the same layer; each layer of the vehicle frame is also provided with a waste water collection tank located below the pulley roller bars in that layer; guide wheels are respectively installed at the front and rear ends of the bottom of the vehicle frame; the vehicle frame is also provided with two pairs of wheel axle supports, and each pair of wheel axle supports is respectively provided with a driving wheel axle. Rubber tires are respectively provided at both ends of the driving wheel axle; a driving motor is also provided at the bottom of the vehicle frame, and the driving motor is connected to the driving wheel axle through a worm and worm gear reducer.

[0006] The aforementioned logistics conveying device for greenhouse floating seedling trays. The overhead crane moving device includes a pair of channel steel rails arranged around the top surface of the greenhouse. Moving mechanisms are respectively provided on both sides of the channel steel rails, and the overhead crane lifting device is connected to the channel steel rails through the moving mechanisms. The moving mechanism includes a first fixed plate, on which a left wheel and a right wheel are installed. A moving motor is provided on one of the mechanisms, and a small gear is installed at the shaft end of the moving motor. A large gear meshing with the small gear is provided on the right wheel. First guide wheel brackets are provided at the front and rear ends of the first fixed plate, and side guide wheels are provided on the first guide wheel brackets. Second guide wheel brackets are respectively provided on one side of the left wheel and one side of the right wheel, and intermediate guide wheels are installed on the second guide wheel brackets.

[0007] The aforementioned logistics conveying device for greenhouse floating seedling trays. The overhead crane lifting device includes a fixed frame body, and a lifting frame body is provided on the fixed frame body. A first-stage slide rail and a second-stage slide rail are provided on the lifting frame body, and the first-stage slide rail and the second-stage slide rail slide relative to each other. The second-stage slide rail and the fixed frame body slide relative to each other. A rack is installed on the second-stage slide rail. A gear-rack motor and a sprocket motor are provided on the fixed frame body. The output end of the gear-rack motor is connected to the rack through a gear. Sprockets are respectively installed on the second-stage slide rail and the fixed frame body, and a chain is provided between the sprockets. The sprocket on the fixed frame body is connected to the sprocket motor.

[0008] The aforementioned logistics conveying device for greenhouse floating seedling trays. The overhead crane rotating and pushing device includes an upper bottom plate connected to the lower end of the overhead crane lifting device, and the upper bottom plate is connected to a lower bottom plate. A slewing bearing, a worm support, and a stepping motor bracket are installed on the upper bottom plate, and a worm gear is installed on the slewing bearing. A worm support and a first stepping motor are provided on the upper bottom plate. A worm is provided on the worm support, and the worm is connected to the shaft end of the stepping motor through a first coupling and meshes with the worm gear. The worm gear is connected with a transmission shaft through a key, and the other side of the transmission shaft is fixed on the lower bottom plate through a bearing seat. Four connecting pieces are installed on the lower bottom plate, and arc-shaped sliding seats are provided on the connecting pieces. An arc-shaped track matching with the arc-shaped sliding seat is provided on the bottom surface of the upper bottom plate. A linear guide rail and two first lead screw supports are provided on the bottom surface of the lower bottom plate. A first ball screw is provided between the first lead screw supports, and the first ball screw is connected to a second stepping motor through a second coupling. The first ball screw is connected to a positioning block through a lead screw nut, and four first guide rail sliders are installed on the linear guide rail.

[0009] The aforementioned logistics conveying device for greenhouse floating seedling trays, wherein the end effector of the overhead crane includes an execution base plate connected to the positioning block and the first guide rail slider. A pair of electric push rods are installed on the lower side of the execution base plate. The electric push rods are connected with a right-angle part through a push rod connecting part. A motor bracket is installed on the right-angle part, and a third stepping motor is installed on the motor bracket. The shaft end of the third stepping motor is connected with a first bevel gear. The two ends of the right-angle part are respectively provided with rotating shafts. One end of the rotating shaft is provided with a second bevel gear meshing with the first bevel gear, and the other end of the rotating shaft is connected with a claw.

[0010] The aforementioned logistics conveying device for greenhouse floating seedling trays further includes a trimming waiting system. The trimming waiting system includes a waiting track. A rail-changing device is arranged between the waiting track and the channel steel track. The rail-changing device includes a rail-changing base plate fixed on the top surface of the greenhouse. A stepping motor frame, a lead screw seat and a guide rail are installed on the rail-changing base plate. A fourth stepping motor is arranged on the stepping motor frame. The fourth stepping motor is connected with a second ball screw through a third coupling. The second ball screw is fixed on the rail-changing base plate through a second lead screw support. A lead screw positioning block is installed on the second ball screw. The lead screw positioning block is connected with a track plate. The track plate is provided with a straight track and a curved track. A plurality of second guide rail sliders are installed on the guide rail. The second guide rail sliders are connected with the track plate through a base plate connecting part.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. The present invention consists of an overhead crane system and a ground transportation system to form the main body of the logistics conveying. Among them, the overhead crane system moves through the overhead crane moving device, which is used to conveniently reach one side of the corresponding water pool. Then, the overhead crane lifting device is used to realize lifting. Then, the overhead crane rotating and pushing device rotates and pushes the end effector of the overhead crane, so that the end effector of the overhead crane can grab the seedling tray from the nutrient solution pool and place it on the ground transportation vehicle. The ground transportation vehicle can realize the conveying of the floating seedling tray on the bottom track, so as to realize the automatic handling of the floating seedling tray, achieving the effects of high efficiency, reliability, high productivity and reducing labor costs.

[0013] 2. By setting the ground transportation vehicle in the present invention, one section of the ground transportation vehicle can accommodate multiple cultivation plates. The number of cultivation plates can be increased by adding the number of carriages according to actual transportation capacity needs. A plurality of waste water collection tanks are arranged inside the ground transportation vehicle in the present invention to prevent waste water from affecting and damaging other structures. The ground transportation vehicle chassis is provided with two front and rear guide wheels, and the guide wheels cooperate with the channel steel tracks embedded in the ground to avoid affecting pedestrians.

[0014] 3. The overhead crane moving system of the present invention consists of a pair of channel steels forming the track, and moving mechanisms are respectively arranged on its left and right sides, which can better achieve stable movement. The moving mechanism of the present invention drives the right wheel to rotate by a moving motor to form the effect of rolling and moving on the channel steel. At the same time, side guide wheels and middle guide wheels are arranged to facilitate its movement within the channel steel and prevent jamming during turning.

[0015] 4. The overhead crane lifting device of the present invention uses a fixed frame as a support, and drives the second-stage slide rail to slide relative to the fixed frame through a chain. It can also drive the rack to move through a gear-rack motor, enabling the first-stage slide rail and the second-stage slide rail to slide relative to each other, thereby adapting to different heights and facilitating cooperation with the multi-layer structure of the vehicle frame.

[0016] 5. The overhead crane rotating and pushing device of the present invention drives the worm to rotate by a first stepping motor, causing the transmission shaft connected to the worm to rotate. The end of the transmission shaft drives the lower bottom plate to rotate. Four connecting pieces are arranged on the lower bottom plate, and the arc-shaped sliding seats on the connecting pieces can rotate on the arc-shaped track on the bottom surface of the upper bottom plate, effectively ensuring the smoothness of the lower bottom plate during rotation. Further, the present invention utilizes the function of a second stepping motor to enable the execution bottom plate to form a front-back telescopic function, facilitating the claw in the end execution device of the overhead crane to reach below the appropriate cultivation plate. At the same time, the end execution device of the overhead crane of the present invention utilizes an electric push rod to enable the claw to lift and lower appropriately, facilitating the lifting and lowering of the cultivation plate and the handling of the cultivation plate. In addition, the present invention also utilizes the function of a third stepping motor to enable the claw to rotate, and further cooperate with the overhead crane rotating and pushing device to achieve more convenient angle adjustment.

[0017] 6. The present invention also sets up a trimming and waiting system. When there is no operation task, the rail-changing device works, the straight rail and the curved rail are switched, and the overhead crane system enters the charging area of the trimming and waiting system for charging, which is more convenient and has a competitive advantage. When there is an operation task, the rail-changing device works, the straight rail and the curved rail are switched, enabling the overhead crane system to enter the channel steel track for work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the external structure of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of the overhead crane system; [[ID=...]] [[ID=...]]

[0020] [[ID=...]] Figure 3 is a schematic diagram of the structure of the ground transport vehicle;

[0021] Figure 4 is a schematic diagram of the bottom structure of the ground transport vehicle;

[0022] Figure 5It is a schematic structural diagram of the overhead crane moving device;

[0023] Figure 6 It is a schematic structural diagram of the moving mechanism;

[0024] Figure 7 It is a schematic structural diagram of the lifting part of the lifting frame;

[0025] Figure 8 It is a schematic structural diagram of the rotating part of the overhead crane rotating and pushing device;

[0026] Figure 9 It is a schematic structural diagram of the overhead crane rotating and pushing device;

[0027] Figure 10 It is a schematic structural diagram of the pushing part of the overhead crane rotating and pushing device.

[0028] Figure 11 It is a schematic structural diagram of the side bottom of the track-changing device.

[0029] Figure 12 It is a schematic structural diagram of the track-changing device. Brief Description of the Drawings

[0031] 1. Ground transportation system; 2. Overhead crane system; 3. Rail change device; 4. End effector of overhead crane; 5. Rotating and pushing device of overhead crane; 6. Moving device of overhead crane; 7. Lifting device of overhead crane; 8. Ground track; 9. Ground transport vehicle; 11. Wastewater collection tank; 12. Cultivation plate; 13. Pulley roller bar; 14. Guide wheel; 15. Frame; 16. Rubber tire; 17. Wheel axle support; 18. Worm and worm gear reducer; 19. Driving motor; 20. Driving wheel axle; 31. Track plate; 32. Bottom plate connecting piece; 33. Guide rail slider; 34. Guide rail; 35. Rail change bottom plate; 36. Fourth stepping motor; 37. Stepping motor frame; 38. Third coupling; 39. Second lead screw seat; 301. Second ball screw; 302. Lead screw positioning block; 303. Straight rail; 304. Curved rail; 41. Claw; 42. First bevel gear; 43. Electric push rod; 44. Execution bottom plate; 45. Third stepping motor; 46. Motor bracket; 47. Right angle piece; 48. Push rod connecting piece; 49. Rotating shaft; 50. Second bevel gear; 51. Upper bottom plate; 52. Worm; 53. Transmission shaft; 54. Worm; 55. Worm support; 56. First coupling; 57. First stepping motor; 58. Lower bottom plate; 59. Connecting piece; 501. Arc sliding seat; 502. Bearing seat; 503. Slewing bearing; 504. Second stepping motor; 505. Second coupling 2; 506. First lead screw seat; 507. Linear guide rail; 508. First guide rail slider; 509. First ball screw; 510. Positioning block; 511. Lead screw nut; 512. Arc track; 61. Moving mechanism; 62. Channel steel track; 64. Left wheel; 65. Small gear; 66. Right wheel; 67. Motor; 68. Intermediate guide wheel; 69. Side guide wheel; 601. First guide wheel bracket; 602. Fixed plate; 603. Large gear; 604. Second guide wheel bracket; 71. First stage slide rail; 72. Second stage slide rail; 73. Sprocket; 74. Chain; 75. Rack; 76. Rack and pinion motor; 77. Fixed frame body; 78. Sprocket motor; 79. Chain fixing piece; 701. Lifting frame body; Detailed implementation mode

[0032] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but it is not used as a basis for limiting the present invention.

[0033] Embodiment: A logistics conveying device for a floating seedling tray in a greenhouse, as Figure 1 and Figure 2As shown, it includes a ground transportation system 1 and an overhead crane system 2; inside the overhead crane system 2, there is an overhead crane moving device 6 arranged around the top surface of the greenhouse. An overhead crane lifting device 7 is provided on the overhead crane moving device 6. The lower end of the overhead crane lifting device 7 is connected to an overhead crane rotating and pushing device 5, and an overhead crane end effector 4 is provided on the overhead crane rotating and pushing device 5; the ground transportation system 1 includes a ground track 8 arranged on the ground of the greenhouse and opposite to the overhead crane moving device 6; a ground transport vehicle 9 is provided on the ground track 8. The present invention is composed of the overhead crane system 2 and the ground transportation system 1 as the main body of the logistics transportation. Among them, the overhead crane system 2 moves through the overhead crane moving device 6, which is used to conveniently reach one side of the corresponding pool. Then, the overhead crane lifting device 7 is used to realize lifting. The overhead crane rotating and pushing device rotates and pushes the overhead crane end effector 4, so that the overhead crane end effector 4 can grab the seedling trays from the nutrient solution pool and place them on the ground transport vehicle 9. The ground transport vehicle 9 can realize the transportation of the floating seedling trays on the bottom track, thereby realizing the automatic handling of the floating seedling trays, achieving the effects of high efficiency, reliability, high productivity, and reducing labor costs.

[0034] Preferably, as Figure 3 and Figure 4 shown, the ground transport vehicle 9 includes a vehicle frame 15 arranged on the ground track 8. The vehicle frame 15 has a multi-layer structure, and each layer is provided with a plurality of pulley roller bars 13. Cultivation plates 12 are placed between the pulley roller bars 13 of the same layer; each layer of the vehicle frame 15 is also provided with a wastewater collection tank 11 located below the pulley roller bars 13 in that layer; guide wheels 14 are respectively installed at the front and rear ends of the bottom of the vehicle frame 15; two pairs of wheel axle supports 17 are also provided on the vehicle frame 15. A driving wheel axle 20 is respectively provided on each pair of wheel axle supports 17, and rubber tires 16 are respectively provided at both ends of the driving wheel axle 20; a driving motor 19 is also provided at the bottom of the vehicle frame 15, and the driving motor 19 is connected to the driving wheel axle 20 through a worm and worm gear reducer 18. By setting the ground transport vehicle 9 in the present invention, one ground transport vehicle 9 can accommodate multiple cultivation plates 12, and the number of cultivation plates 12 can be increased by increasing the number of carriages according to actual transport capacity needs. In the present invention, a plurality of wastewater collection tanks 11 are provided inside the ground transport vehicle 9 to prevent wastewater from affecting and damaging other structures. Two guide wheels 14 are provided at the front and rear of the chassis of the ground transport vehicle 9, and the guide wheels 14 cooperate with the channel steel tracks 62 embedded in the ground to avoid affecting pedestrians.

[0035] Preferably, as Figure 1 and Figure 5 shown, the overhead crane moving device includes a pair of channel steel tracks 62 arranged around the top surface of the greenhouse. Moving mechanisms 61 are respectively provided on both sides of the channel steel tracks 62, and the overhead crane lifting device 7 is connected to the channel steel tracks 62 through the moving mechanisms 61; as Figure 6As shown, the moving mechanism includes a first fixed plate 602, on which a left wheel 64 and a right wheel 66 are installed; a moving motor 67 is provided on one of the mechanisms, a pinion 65 is installed at the shaft end of the moving motor 67, and a large gear 603 meshing with the pinion 65 is provided on the right wheel 66; first guide wheel brackets 601 are provided at the front and rear ends of the first fixed plate 602, side guide wheels 69 are provided on the first guide wheel brackets 601, and first guide wheel brackets 604 are further provided on one side of the left wheel 64 and one side of the right wheel 66 respectively, and middle guide wheels 68 are installed on the first guide wheel brackets 604. The overhead crane moving system 6 of the present invention consists of a pair of channel steels to form a track, and then moving mechanisms are respectively arranged on its left and right sides, which can better achieve stable movement. The moving mechanism of the present invention drives the right wheel 66 to rotate by the moving motor 67 to form an effect of rolling and moving on the channel steel, and at the same time, side guide wheels 69 and middle guide wheels 68 are provided to facilitate its movement in the channel steel and prevent jamming during steering.

[0036] Preferably, as Figure 2 and Figure 7 As shown, the overhead crane lifting device 7 includes a fixed frame body 77, and a lifting frame body 701 is provided on the fixed frame body 77; a first-stage slide rail 71 and a second-stage slide rail 72 are provided on the lifting frame body 701, and the first-stage slide rail 71 and the second-stage slide rail 72 slide relative to each other; the second-stage slide rail 72 and the fixed frame body 77 slide relative to each other; a rack 75 is installed on the second-stage slide rail 72; a gear-rack motor 76 and a sprocket motor 78 are provided on the fixed frame body; the output end of the gear-rack motor 76 is connected to the rack 75 through a gear; sprockets 73 are further installed on the second-stage slide rail 72 and the fixed frame body 77 respectively, and a chain 74 is provided between the sprockets 73; the sprocket 73 on the fixed frame body 44 is connected to the sprocket motor 78. The overhead crane lifting device 7 of the present invention uses the fixed frame body 77 as a support, drives the second-stage slide rail 72 and the fixed frame body 77 to slide relative to each other through the chain 74, and can also drive the rack 75 to move through the gear-rack motor 76, so that the first-stage slide rail 71 and the second-stage slide rail 72 can slide relative to each other, thereby adapting to different heights and facilitating cooperation with the multi-layer structure of the vehicle frame 15.

[0037] Preferably, as Figures 8 - 10As shown in the figure, the overhead crane rotation and pushing device 5 includes an upper bottom plate 51 connected to the lower end of the overhead crane lifting device 7, and the upper bottom plate 51 is connected to a lower bottom plate 58; a slewing bearing 503, a worm support 55 and a stepping motor support are installed on the upper bottom plate 51, and a worm gear 52 is installed on the slewing bearing 503; the upper bottom plate 51 is provided with a worm support 55 and a first stepping motor 57; a worm 54 is provided on the worm support 55, the worm 54 is connected to the shaft end of the first stepping motor 57 through a first coupling 56, and the worm 54 meshes with the worm gear; the worm gear 52 is connected with a transmission shaft 53 by a key, and the other side of the transmission shaft 53 is fixed on the lower bottom plate 58 through a bearing seat 502. Four connecting pieces 59 are installed on the lower bottom plate 58, and an arc sliding seat 501 is provided on the connecting piece 59; an arc track 512 matching the arc sliding seat 501 is provided on the bottom surface of the upper bottom plate 51; a linear guide rail 507 and two first lead screw supports 506 are provided on the bottom surface of the lower bottom plate 58; a first ball screw 509 is arranged between the first lead screw supports 506, and the first ball screw 509 is connected with a second stepping motor 504 through a second coupling; the first ball screw 509 is connected with a positioning block 510 through a screw nut 511, and four first guide rail sliders 508 are installed on the two linear guide rails 507. The overhead crane end effector 4 includes an execution bottom plate 44 connected to the positioning block and the first guide rail slider 508. A pair of electric push rods 43 are installed on the lower side of the execution bottom plate 44. The electric push rods 43 are connected with a right-angle part 47 through a push rod connecting piece 48. A motor support 46 is installed on the right-angle part 47, and a third stepping motor 45 is installed on the motor support 46. The shaft end of the third stepping motor 45 is connected with a first bevel gear 42. Rotating shafts 49 are respectively penetrated through both ends of the right-angle part 47. A second bevel gear 50 meshing with the first bevel gear 42 is provided at one end of the rotating shaft 49, and a claw 41 is connected to the other end of the rotating shaft 49. The overhead crane rotation and pushing device 5 of the present invention drives the worm gear to rotate by the first stepping motor 57, so that the transmission shaft 53 connected to the worm gear rotates. The end of the transmission shaft 53 drives the lower bottom plate 58 to rotate. Four connecting pieces 59 are arranged on the lower bottom plate 58, and the arc sliding seat 501 on the connecting piece 59 can rotate on the arc track 512 on the bottom surface of the upper bottom plate 51, thereby effectively ensuring the smoothness of the lower bottom plate 58 during the rotation process. Further, the present invention utilizes the function of the second stepping motor 504 to enable the execution bottom plate 44 to form a function of telescoping back and forth, facilitating the claw 41 in the overhead crane end effector 4 to reach below the appropriate cultivation plate 12. At the same time, the overhead crane end effector 4 of the present invention utilizes the electric push rod 43 to enable the claw 41 to be lifted and lowered appropriately, facilitating the lifting and lowering of the cultivation plate 12 by the claw 41 and facilitating the handling of the cultivation plate 12. In addition, the present invention also utilizes the function of the third stepping motor 45 to enable the claw 41 to rotate, and further can cooperate with the overhead crane rotation and pushing device 5 to realize more convenient angle adjustment.

[0038] Preferably, as Figure 11 and Figure 12 shown, it further includes a trimming waiting system. The trimming waiting system includes a waiting track. There is a rail-changing device 3 between the waiting track and the channel steel track 62. The rail-changing device 3 includes a rail-changing bottom plate 35 fixed to the top surface of the greenhouse. A stepping motor frame 37, a lead screw seat and a guide rail 34 are installed on the rail-changing bottom plate 35. A fourth stepping motor 36 is provided on the stepping motor frame 37. The fourth stepping motor 36 is connected to a second ball screw 301 through a third coupling 38. The second ball screw 301 is fixed to the rail-changing bottom plate 35 through a second lead screw seat 39. A lead screw positioning block 302 is installed on the second ball screw 301. The lead screw positioning block 302 is connected to a track plate 31. A straight rail 303 and a curved rail 304 are provided on the track plate 31. A plurality of second guide rail sliders 33 are installed on the guide rail 34. The second guide rail sliders 33 are connected to the track plate 31 through a bottom plate connecting member 32. By setting the trimming waiting system in the present invention, when there is no operation task, the rail-changing device 3 works, and the straight rail 303 and the curved rail 304 are switched. The overhead crane system 2 enters the charging area of the trimming waiting system for charging, which is more convenient and has a competitive advantage. When there is an operation task, the rail-changing device 3 works, and the straight rail 303 and the curved rail 304 are switched, so that the overhead crane system 2 enters the channel steel track 62 to work.

[0039] Working principle

[0040] The present invention consists of an overhead crane system 2 and a ground transportation system to form the main body of the logistics transportation. Among them, the overhead crane system 2 moves through the overhead crane moving device, which is used to conveniently reach one side of the corresponding water tank. Then, the overhead crane lifting device 7 is used to realize the lifting. The overhead crane rotating and pushing device rotates and pushes the end execution device 4 of the overhead crane, so that the end execution device 4 of the overhead crane can grab the seedling tray from the nutrient solution tank and place it on the ground transport vehicle 9. The ground transport vehicle 9 can realize the transportation of the floating seedling tray on the bottom track.

Claims

1. A logistics conveying device for a greenhouse floating seedling tray, characterized in that: It includes a ground transportation system (1) and an overhead crane system (2); within the overhead crane system (2), there is an overhead crane moving device (6) arranged around the top surface of the greenhouse. An overhead crane lifting device (7) is provided on the overhead crane moving device (6). The lower end of the overhead crane lifting device (7) is connected to an overhead crane rotating and pushing device (5), and an overhead crane end effector (4) is provided on the overhead crane rotating and pushing device (5); the ground transportation system (1) includes a ground track (8) provided on the ground of the greenhouse and arranged opposite to the overhead crane moving device (6); a ground transport vehicle (9) is provided on the ground track (8).

2. The logistics conveying device for the greenhouse floating seedling tray according to claim 1, wherein: The ground transport vehicle (9) includes a vehicle frame (15) provided on the ground track. The vehicle frame (15) has a multi-layer structure, and each layer is provided with multiple pulley roller bars (13). Cultivation plates (12) are placed between the pulley roller bars (13) of the same layer; each layer of the vehicle frame (15) is also provided with a waste water collection tank (11) located below the pulley roller bars (13) in that layer; guide wheels (14) are respectively installed at the front and rear ends of the bottom of the vehicle frame (15); there are also two pairs of wheel axle supports (17) on the vehicle frame. A driving wheel axle (20) is respectively provided on each pair of wheel axle supports (17), and rubber tires (16) are respectively provided at both ends of the driving wheel axle (20); a driving motor (19) is also provided at the bottom of the vehicle frame. The driving motor (19) is connected to the driving wheel axle (20) through a worm and worm gear reducer (18).

3. The logistics conveying device of the greenhouse floating seedling tray according to claim 1, characterized in that: The overhead crane moving device (6) includes a pair of channel steel tracks (62) arranged around the top surface of the greenhouse. Moving mechanisms (61) are respectively provided on both sides of the channel steel tracks (62). The overhead crane lifting device (7) is connected to the channel steel tracks (62) through the moving mechanisms (61); the moving mechanisms (61) include a first fixing plate (602). A left wheel (64) and a right wheel (66) are installed on the first fixing plate (602); a moving motor (67) is provided on one of the mechanisms (61). A small gear (65) is installed at the shaft end of the moving motor (67). A large gear (603) meshing with the small gear (65) is provided on the right wheel (66); first guide wheel brackets (601) are provided at the front and rear ends of the first fixing plate (602), and side guide wheels (69) are provided on the first guide wheel brackets (601). Second guide wheel brackets (604) are respectively provided on one side of the left wheel (64) and one side of the right wheel (66), and intermediate guide wheels (68) are installed on the second guide wheel brackets.

4. The logistics conveying device of the greenhouse floating seedling tray according to claim 1, wherein: The overhead crane lifting device (7) includes a fixed frame body (77), and a lifting frame body (701) is provided on the fixed frame body (77); a first-stage slide rail (71) and a second-stage slide rail (72) are provided on the lifting frame body (701), and the first-stage slide rail (71) and the second-stage slide rail (72) slide relative to each other; the second-stage slide rail (72) and the fixed frame body (77) slide relative to each other; a rack (75) is installed on the second-stage slide rail (72); a gear-rack motor (76) and a sprocket motor (78) are provided on the fixed frame body; the output end of the gear-rack motor (76) is connected to the rack (75) through a gear; sprockets (73) are respectively installed on the second-stage slide rail (72) and the fixed frame body, and a chain (74) is provided between the sprockets (73); the sprocket (73) on the fixed frame body (77) is connected to the sprocket motor (78).

5. The logistics conveying device for the greenhouse floating seedling tray according to claim 1, characterized in that: The overhead crane rotary push-out device (5) includes an upper bottom plate (51) connected to the lower end of the overhead crane lifting device (7), and the upper bottom plate (51) is connected to a lower bottom plate (58); a slewing bearing (503), a worm support (55) and a stepping motor support are installed on the upper bottom plate (51), and a worm gear (52) is installed on the slewing bearing (503); a worm support (55) and a first stepping motor (57) are provided on the upper bottom plate (51); a worm (54) is provided on the worm support (55), the worm (54) is connected to the shaft end of the stepping motor (57) through a first coupling (56), and the worm (54) meshes with the worm gear (52); the worm gear (52) is connected to a transmission shaft (53) through a key, and the other side of the transmission shaft (53) is fixed to the lower bottom plate (58) through a bearing seat (502), four connecting pieces (59) are installed on the lower bottom plate (58), and an arc-shaped sliding seat (501) is provided on the connecting piece (59); an arc-shaped track (512) matching with the arc-shaped sliding seat (501) is provided on the bottom surface of the upper bottom plate; a linear guide rail (507) and two first lead screw supports (506) are provided on the bottom surface of the lower bottom plate (58); a first ball screw (509) is provided between the first lead screw supports (506), the first ball screw (509) is connected to a second stepping motor (504) through a second coupling (505); the first ball screw (509) is connected to a positioning block (510) through a lead screw nut (511), and four first guide rail sliders (508) are installed on the linear guide rail (507).

6. The logistics conveying device of the greenhouse floating seedling tray according to claim 5, characterized in that: The end effector (4) of the overhead crane includes an execution base plate (44) connected to the positioning block (510) and the first guide rail slider (508). A pair of electric push rods (43) are installed on the lower side of the execution base plate (44). The electric push rods (43) are connected to a right-angle member (47) through push rod connectors (48). A motor bracket (46) is installed on the right-angle member (47), and a third stepping motor (45) is installed on the motor bracket (46). The shaft end of the third stepping motor (45) is connected to a first bevel gear (42). Rotating shafts (49) are respectively inserted through both ends of the right-angle member (47). A second bevel gear (50) meshing with the first bevel gear (42) is provided at one end of the rotating shaft (49), and a claw (41) is connected to the other end of the rotating shaft.

7. The logistics conveying device of the greenhouse floating seedling tray according to claim 3, characterized in that: It further includes a trimming waiting system (3). The trimming waiting system (3) includes a waiting track (303). A rail-changing device is provided between the waiting track (303) and the channel steel track (62). The rail-changing device includes a rail-changing base plate (35) fixed to the top surface of the greenhouse. A stepping motor bracket (37), a lead screw seat (39), and a guide rail (34) are installed on the rail-changing base plate (35). A fourth stepping motor (36) is provided on the stepping motor bracket (37). The fourth stepping motor (36) is connected to a second ball screw (301) through a third coupling (38). The second ball screw (301) is fixed to the rail-changing base plate (35) through a second lead screw support (39). A lead screw positioning block (302) is installed on the second ball screw (301). The lead screw positioning block (302) is connected to a track plate (31). A straight track (303) and a curved track (304) are provided on the track plate (31). A plurality of second guide rail sliders (33) are installed on the guide rail (34). The second guide rail sliders (33) are connected to the track plate (31) through a base plate connector (32).

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