Feeding and discharging device for forestry seedling bed

Abstract

The invention discloses a forestry seedling bed feeding and discharging device, and belongs to the technical field of seedling bed feeding and discharging, the forestry seedling bed feeding and discharging device comprises a top plate, the two sides of the bottom of the top plate are connected with supporting side plates, and one side of each supporting side plate is provided with a feeding mechanism and a discharging mechanism. According to the device, the feeding mechanism and the pushing plate are arranged, so that the seedling trays above can be driven to be supported, falling of the seedling trays above is avoided, the seedling trays can sequentially enter the conveying belt at a time, on one hand, a first lifting lead screw is matched with a first lead screw base to drive the position of a material storage box to change, and then the seedling trays are conveyed to the conveying belt; on the one hand, a worker can stack and store seedling trays at a low position, the difficulty of placing the seedling trays is reduced, the working efficiency is improved, on the other hand, through pushing and limiting of the pushing plate, single-time orderly feeding of the multiple seedling trays can be achieved, orderly feeding and placing of the seedling trays are facilitated, the mechanization degree is improved, and the feeding efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of loading and unloading materials on a nursery bed, and in particular relates to a loading and unloading device for a forestry nursery bed. Background Art

[0002] With the rapid development of forestry planting science and technology, today's forestry seedling cultivation generally uses seedling trays to cultivate seedlings in nurseries, hotbeds or greenhouses. After careful cultivation, they are transplanted to the land for planting. During the seedling transplanting process, it is often necessary to use loading and unloading devices to assist in placing the seedlings on the seedbed.

[0003] The document with the publication number of CN112849956A discloses a loading and unloading system for forestry seedling beds, including a mobile seedling bed and a feeding device, by respectively arranging rollers on the tray of the seedling bed and the pushing device, and enabling them to be driven by chains and gears, and then utilizing a driving gear to drive the seedling bed and the tray to be connected, so that the seedling bed and the tray can become a conveyor belt, and the seedling tray on the seedling bed can be transported to the tray, and the seedling tray on the tray can also be transported to the seedling bed. The lead screw arranged on the pushing device can lift the tray by utilizing the electric push rod on the lead screw mother seat, so that the tray can slide up and down to a specified position, and finally the feed or unloading of the seedling tray is performed by driving the motor forward and reversely, and the controller is uniformly controlled, and during the whole loading and unloading process, the staff only needs to connect the pushing device with the mobile seedling bed, and the controller system can be used, wherein the transportation work is completed by machinery, which not only saves labor costs, but also improves work efficiency, but in the actual operation process, it is difficult to realize orderly automatic feeding of multiple seedling trays, and the feeding efficiency is low, so it needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to propose a loading and unloading device for a forestry nursery bed in order to solve the problem that it is difficult to realize orderly automatic loading of multiple seedling trays and the loading efficiency is low.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A loading and unloading device for a forestry nursery bed comprises a top plate, both sides of the bottom of the top plate are connected to supporting side plates, one side of the two supporting side plates is respectively provided with a loading mechanism and a unloading mechanism, one side of the bottom of the top plate is provided with a seedling tray placing mechanism for placing a seedling tray, one side of the supporting side plate is provided with a through groove, and a conveyor belt for conveying the seedling tray is connected in the through groove; The feeding mechanism includes a storage box that moves in the vertical direction and is used for stacking and storing seedling trays. Two symmetrically arranged moving grooves are provided at the bottom of the storage box. A pushing plate for pushing the seedling trays is slidably connected in the moving grooves. A moving plate that can automatically reset is connected to one side of the pushing plate. A cam is attached to the other side of the moving plate. When the pushing plate pushes the seedling trays into the conveyor belt, the seedling trays above are limited and blocked to achieve single and orderly feeding.

[0006] As a further description of the above technical solution: Two symmetrically arranged moving slide rods are connected to both sides of the bottom of the moving plate, and two sliding holes are symmetrically opened on one side of the bottom of the material storage box. The moving slide rods are slidably connected to the sliding holes, and a second spring is sleeved on the outer surface of the moving slide rod. The two sides of the second spring are respectively connected to one side of the moving plate and one side of the material storage box.

[0007] As a further description of the above technical solution: One side of the material storage box is connected to an assembly plate, and a driving motor is fixedly installed on the top of the assembly plate through the mounting plate. One end of the driving motor output shaft is connected to a connecting shaft, and the other end of the connecting shaft extends to the other side of the assembly plate and is connected to one side of the cam. Both sides of the bottom of the assembly plate are connected to reinforcement plates, one side of the reinforcement plate is connected to one side of the material storage box, and one side of the reinforcement plate is in contact with one side of the push plate.

[0008] As a further description of the above technical solution: A second screw seat is connected to both sides of the material storage box, and one side of one supporting side plate is connected to two symmetrically arranged fixed brackets, a second lifting screw is rotatably connected inside the fixed bracket, the second lifting screw is threadedly connected to the second screw seat, a second motor is connected to the top of the fixed bracket, one end of the second lifting screw extends to the other side of the fixed bracket and is connected to one end of the second motor output shaft.

[0009] As a further description of the above technical solution: The top of the two wheels is provided with a toothed structure, and the toothed structure is designed so that the two wheels are locked. The toothed structure is designed so that the two wheels are locked. The toothed structure is designed so that the two wheels are locked.

[0010] As a further description of the above technical solution: A fixed groove seat is attached to one side of the driving rack, one side of the fixed groove seat is connected to one side of the connecting side plate, a lifting cylinder is connected to the top of the connecting plate, and the top of the lifting cylinder is connected to the bottom of the top plate.

[0011] As a further description of the above technical solution: A vertical plate for limiting the position of the seedling tray is connected to one side of the top of the support plate, and a plurality of balls are arranged in a linear array on the support plate.

[0012] As a further description of the above technical solution: The unloading mechanism includes a lifting plate that can move up and down, and a closing box is arranged above the lifting plate, and moving wheels are connected to the four sides of the bottom of the closing box, and the moving wheels are in contact with the top of the lifting plate, and a plurality of linear array storage slots are opened on one side of the closing box, and limiting plates are connected to both sides of the top of the lifting plate, and one side of the limiting plate is connected to a first screw seat, and the first screw seat is internally threaded with a first lifting screw, and both ends of the first lifting screw are rotatably connected to a mounting part, one side of the mounting part is connected to the supporting side plate, and a first motor is fixedly installed on the top of the mounting part located at the top, and one end of the first lifting screw extends to the other side of the mounting part and is connected to one end of the output shaft of the first motor.

[0013] As a further description of the above technical solution: The bottom center of the closing box is connected to a limited slot seat, a clamping block is slidably connected in the limited slot seat, the bottom of the clamping block is connected to the bottom of the lifting plate, and one side of the clamping block is rotatably connected to a limited knob through a rotating shaft.

[0014] As a further description of the above technical solution: The bottom of the supporting side plate is connected with a universal driving wheel, the bottom of the top plate is slidably connected with a mobile lifting device, and the top of the mobile lifting device is connected with a clamping claw for grabbing the seedling tray.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, a feeding mechanism is provided, a driving motor drives a cam to rotate, and the cam cooperates with the second spring to drive the moving plate to do reciprocating motion. The moving plate pushes the seedling tray to one side through the pushing plate, so that the seedling tray can be moved onto the conveyor belt, and in this process, the pushing plate can drive the seedling tray above to support it, so as to prevent the seedling tray above from falling, so that the seedling tray can enter the conveyor belt in a single and orderly manner. On the one hand, the first lifting screw cooperates with the first screw seat to drive the position change of the storage box, so that the staff can stack and store the seedling trays at a low place, reducing the difficulty of placing the seedling trays and improving the work efficiency. On the other hand, through the pushing and limiting of the pushing plate, a single and orderly loading of multiple seedling trays can be realized, which is conducive to the orderly loading and placement of the seedling trays, improving the degree of mechanization and improving the loading efficiency.

[0016] 2. In the present invention, by setting a feeding mechanism, the first motor drives the lifting plate to move downward through the first lifting screw and the first screw seat, and makes the vacated disk storage slot face the conveyor belt again, and after the receiving box is full, the lifting plate moves to the bottom, and the staff releases the limit of the limit slot seat through the limit knob, so that the staff can move the receiving box through the moving wheel, which is convenient for the staff to transport the seedling trays, and the receiving box cooperates with the up and down movement of the lifting plate to realize orderly storage of finished seedling trays, thereby improving the orderliness and efficiency of feeding, and the setting of the multi-layer disk storage slots can make there be enough gaps between the finished seedling trays, so as to avoid the seedling trays squeezing each other to damage the seedlings, thereby improving the survival rate of the seedlings in the seedling trays.

[0017] 3. In the present invention, by setting a seedling tray placing mechanism, the seedling tray is gradually and completely moved to fit with the supporting plate under the cooperation of the conveyor belt and the ball bearing, and the vertical plate limits the seedling tray to prevent the seedling tray from deviating. After the seedling tray completely enters the supporting plate, the lifting cylinder drives the seedling tray to move downward through the connecting plate and the connecting side plate and the supporting plate, and the seedling bed will produce an extrusion force on the driving rack, so that the driving rack drives the supporting plate to move outward through the transmission gear and the driving screw, and the two supporting plates are gradually separated from the seedling tray, so that the seedling tray can be automatically separated from the seedling tray placing mechanism at a distance close to the seedling bed, so as to realize the automatic placement of the seedling tray, improve the overall automation degree of the device, and, by triggering, the seedling tray is placed and loaded when it contacts the seedling bed, thereby improving the stability and orderliness of the seedling tray placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention; Figure 3 It is a schematic diagram of the three-dimensional split structure of the present invention; Figure 4It is a schematic diagram of the three-dimensional split structure of the feeding mechanism of the present invention; Figure 5 It is a schematic diagram of the three-dimensional split structure of the blanking mechanism of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram of part A in the middle; Figure 7 It is a three-dimensional structural schematic diagram of the seedling tray placing mechanism of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram of part B in the middle; Fig. 9 It is a top view of the three-dimensional structure of the seedling tray placement mechanism of the present invention.

[0019] Legend: 1. Top plate; 2. Support side plate; 3. Unloading mechanism; 301. Closed tray box; 302. Lifting plate; 303. First lifting screw; 304. First screw seat; 305. First motor; 306. Storage slot; 307. Moving wheel; 308. Limiting plate; 309. Limiting slot seat; 310. Clamping block; 311. Limiting knob; 4. Universal driving wheel; 5. Conveyor belt; 6. Mobile lifting device; 7. Seedling tray placement mechanism; 701. Lifting cylinder; 702. Connecting side plate; 703. Connecting plate; 704. Transmission gear; 705. Supporting plate; 706. Vertical plate; 707, mounting seat; 708, first spring; 709, fixed slide bar; 710, fixed groove seat; 711, driving rack; 712, driving screw; 713, ball; 8, feeding mechanism; 801, material storage box; 802, driving motor; 803, assembly plate; 804, cam; 805, fixed bracket; 806, second motor; 807, second lifting screw; 808, second screw seat; 809, moving plate; 810, moving slide bar; 811, second spring; 812, pushing plate; 813, reinforcement plate; 9, clamping claw; 10, through groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 9 , the present invention provides a technical solution: A loading and unloading device for a forestry seedling bed comprises a top plate 1, support side plates 2 are connected to both sides of the bottom of the top plate 1, a loading mechanism 8 and a unloading mechanism 3 are respectively arranged on one side of the two support side plates 2, a seedling tray placing mechanism 7 for placing seedling trays is arranged on one side of the bottom of the top plate 1, a through groove 10 is opened on one side of the support side plate 2, a conveyor belt 5 for conveying the seedling trays is connected in the through groove 10, a universal driving wheel 4 is connected to the bottom of the support side plate 2, a mobile lifting device 6 is slidably connected to the bottom of the top plate 1, and a clamping claw 9 for grabbing the seedling tray is connected to the top of the mobile lifting device 6.

[0022] The feeding mechanism 8 includes a storage box 801 that moves in the vertical direction and is used to stack and store seedling trays. Two symmetrically arranged moving grooves are provided at the bottom of the storage box 801. A pushing plate 812 for pushing the seedling tray is slidably connected in the moving groove. A moving plate 809 that can automatically reset is connected to one side of the pushing plate 812. A cam 804 is attached to the other side of the moving plate 809. When the pushing plate 812 pushes the seedling tray to enter the conveyor belt 5, the upper seedling tray is limited and blocked to realize single and orderly feeding. Two symmetrically arranged moving slide bars 810 are connected to the two sides of the bottom of the moving plate 809. Two sliding holes are symmetrically provided on one side of the bottom of the storage box 801. The moving slide bar 810 is slidably connected to the sliding hole. A second spring 811 is sleeved on the outer surface of the moving slide bar 810. The second spring 811 is respectively connected to one side of the moving plate 809 and one side of the storage box 801. One side of the storage box 801 is connected to an assembly plate 8 03. A driving motor 802 is fixedly installed on the top of the assembly plate 803 through a mounting plate, one end of the output shaft of the driving motor 802 is connected to a connecting shaft, the other end of the connecting shaft extends to the other side of the assembly plate 803 and is connected to one side of the cam 804, both sides of the bottom of the assembly plate 803 are connected to reinforcing plates 813, one side of the reinforcing plate 813 is connected to one side of the material storage box 801, and one side of the reinforcing plate 813 is fitted with one side of the pushing plate 812, and both sides of the material storage box 801 are connected to second screw seats 808, one side of one of the supporting side plates 2 is connected to two symmetrically arranged fixed brackets 805, the fixed bracket 805 is rotatably connected with a second lifting screw 807, the second lifting screw 807 is threadedly connected to the second screw seat 808, the top of the fixed bracket 805 is connected to a second motor 806, one end of the second lifting screw 807 extends to the other side of the fixed bracket 805 and is connected to one end of the output shaft of the second motor 806.

[0023] The specific implementation method is as follows: by setting a feeding mechanism 8, the driving motor 802 drives the cam 804 to rotate, and the cam 804 cooperates with the second spring 811 to drive the movable plate 809 to do reciprocating motion. The movable plate 809 pushes the seedling tray to one side through the pushing plate 812, so that the seedling tray can be moved to the conveyor belt 5, and in this process, the pushing plate 812 can drive the upper seedling tray to support it to prevent the upper seedling tray from falling, so that the seedling tray can enter the conveyor belt 5 in a single and orderly manner. The first lifting screw 303 cooperates with the first screw seat 304 to drive the position of the storage box 801 to change, so that the staff can stack and store the seedling trays at a low place, reducing the difficulty of placing the seedling trays and improving work efficiency.

[0024] The seedling tray placing mechanism 7 includes two symmetrically arranged connecting side plates 702, two connecting plates 703 are connected to the top of the two connecting side plates 702, two transmission gears 704 are symmetrically arranged on one side of the connecting side plate 702, one side of the transmission gear 704 is meshed and connected with a driving rack 711, a slide groove is provided on the top of the driving rack 711, a fixed slide rod 709 is slidably connected in the slide groove, a mounting seat 707 is connected to the top of the fixed slide rod 709, one side of the mounting seat 707 is connected to one side of the connecting side plate 702, a first spring 708 is sleeved on the outer surface of the fixed slide rod 709, and two ends of the first spring 708 are respectively connected to one side of the mounting seat 707 and the driving rack 711 The transmission gear 704 is rotatably connected to a rotating shaft on one side, one end of the rotating shaft extends to the other side of the connecting side plate 702 and is connected to a driving screw 712. The outer surfaces of the two driving screws 712 are threadedly connected to the same supporting plate 705 for supporting the seedling tray. A fixed groove seat 710 is attached to one side of the driving rack 711, and one side of the fixed groove seat 710 is connected to one side of the connecting side plate 702. A lifting cylinder 701 is connected to the top of the connecting plate 703, and the top of the lifting cylinder 701 is connected to the bottom of the top plate 1. A vertical plate 706 for limiting the seedling tray is connected to one side of the top of the supporting plate 705, and a plurality of balls 713 are arranged in a linear array on the supporting plate 705.

[0025] The specific implementation method is as follows: by setting a seedling tray placing mechanism 7, the seedling tray is gradually and completely moved to fit with the supporting plate 705 under the cooperation of the conveyor belt 5 and the ball bearing 713, and the vertical plate 706 limits the seedling tray to prevent the seedling tray from deviating. After the seedling tray completely enters the supporting plate 705, the lifting cylinder 701 drives the seedling tray to move downward through the connecting plate 703 and the connecting side plate 702 and the supporting plate 705, and the seedling bed will generate an extrusion force on the driving rack 711, so that the driving rack 711 drives the supporting plate 705 to move outward through the transmission gear 704 and the driving screw 712, and the two supporting plates 705 are gradually separated from the seedling tray, so that the seedling tray can be automatically separated from the seedling tray placing mechanism 7 at a distance close to the seedling bed, so that the automatic placement of the seedling tray can be realized, thereby improving the overall automation level of the device.

[0026] The unloading mechanism 3 includes a lifting plate 302 that can move up and down, a disk collection box 301 is arranged above the lifting plate 302, moving wheels 307 are connected to the bottom and four sides of the disk collection box 301, the moving wheels 307 are in contact with the top of the lifting plate 302, a plurality of linear array disk storage slots 306 are opened on one side of the disk collection box 301, both sides of the top of the lifting plate 302 are connected to limit plates 308, one side of the limit plate 308 is connected to a first screw seat 304, the first screw seat 304 is internally threaded with a first lifting screw 303, and the first lifting screw Both ends of 303 are rotatably connected with mounting parts, one side of the mounting part is connected to the supporting side plate 2, and a first motor 305 is fixedly installed on the top of the mounting part located at the top, one end of the first lifting screw 303 extends to the other side of the mounting part and is connected to one end of the output shaft of the first motor 305, and a limiting slot seat 309 is connected to the center position of the bottom of the closing box 301, and a clamping block 310 is slidably connected in the limiting slot seat 309, and the bottom of the clamping block 310 is connected to the bottom of the lifting plate 302, and one side of the clamping block 310 is rotatably connected to the limiting knob 311 through a rotating shaft.

[0027] The specific implementation method is as follows: by setting up the unloading mechanism 3, the first motor 305 drives the lifting plate 302 to move downward through the first lifting screw 303 and the first screw seat 304, and makes the vacant disk storage slot 306 face the conveyor belt 5 again, and after the receiving box 301 is full, the lifting plate 302 moves to the bottom, and the staff releases the limit on the limit slot seat 309 through the limit knob 311, so that the staff can move the receiving box 301 through the moving wheel 307, which is convenient for the staff to transport the seedling trays, and the receiving box 301 cooperates with the up and down movement of the lifting plate 302 to realize the orderly storage of the finished seedling trays, thereby improving the orderliness and efficiency of unloading, and the setting of the multi-layer disk storage slots 306 can make there be enough gaps between the finished seedling trays.

[0028] Working principle: When loading the seedling trays onto the seedling bed, the staff first drives the storage box 801 to move downward through the second lifting screw 807 and the second screw seat 808, and the staff stacks the seedling trays in sequence and places them in the storage box 801. After that, the device is moved as a whole to the seedling bed through the universal drive wheel 4, and the seedling bed is placed between the two supporting side panels 2.

[0029] The staff starts the second motor 806 to drive the second lifting screw 807 to rotate, and the second lifting screw 807 drives the second screw seat 808 to move upward, and the second screw seat 808 drives the storage box 801 to move upward, and makes the moving groove at the bottom of the storage box 801 flush with the end surface of the conveyor belt 5. After that, the driving motor 802 is started, and the driving motor 802 drives the cam 804 to rotate, and the cam 804 drives the moving plate 809 to move to one side. At the same time, the second spring 811 cooperates with the moving slide bar 810 to drive the moving plate 809 to do a reset movement, so that the moving plate 809 does a reciprocating motion, and the moving plate 809 drives the pushing plate 812 to do a reciprocating motion, so that the pushing plate 812 can enter the moving groove and push the seedling tray to one side, so that the seedling tray can move onto the conveyor belt 5, and in this process, the pushing plate 812 can drive the upper seedling tray to support it to prevent the upper seedling tray from falling, so that the seedling tray can enter the conveyor belt 5 in a single and orderly manner.

[0030] The seedling tray moves on the conveyor belt 5 and gradually moves to the seedling tray placement mechanism 7 on one side. The seedling tray gradually moves to the support plate 705 under the conveyance of the conveyor belt 5. The seedling tray gradually and completely fits with the support plate 705 under the cooperation of the conveyor belt 5 and the ball bearing 713. In this process, after the seedling tray completely enters the support plate 705, the lifting cylinder 701 drives the connecting plate 703 to move, and the connecting plate 703 drives the connecting side plate 702 to move downward, and the connecting side plate 702 drives the seedling tray to move downward through the support plate 705 During this process, the driving rack 711 gradually fits against the top of the seedling bed, and the seedling bed will produce an extrusion force on the driving rack 711, causing the driving rack 711 to move, and the driving rack 711 drives the transmission gear 704 to rotate, and the transmission gear 704 drives the driving screw 712 to rotate, and the driving screw 712 drives the supporting plate 705 to move outward, and the two supporting plates 705 gradually separate from the seedling tray, so that the seedling tray can automatically separate from the seedling tray placement mechanism 7 at a distance close to the seedling bed.

[0031] When unloading the finished seedling tray, the other side of the device is placed close to the seedling bed, and the staff starts the mobile lifting device 6, which drives the clamping claw 9 to move to the finished seedling tray. The clamping claw 9 grabs the finished seedling tray and moves the finished seedling tray to the top of the conveyor belt 5 through the mobile lifting device 6. The finished seedling tray is clamped and placed on the conveyor belt 5. The conveyor belt 5 conveys the finished seedling tray to the storage slot 306 in the tray collection box 301. After one side is stored, the first motor 305 drives the first lifting screw 303 to rotate, and the first lifting screw 303 drives the first screw seat When the tray collection box 301 is full, the lifting plate 302 moves to the bottom. At this time, the staff turns the limit knob 311 to release the limit on the limit slot seat 309, so that the staff can move the tray collection box 301 through the moving wheel 307, which is convenient for the staff to transport the seedling trays. The tray collection box 301 cooperates with the lifting plate 302 to move up and down, and the finished seedling trays can be stored in an orderly manner.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A loading and unloading device for a forestry nursery bed, comprising a top plate (1), characterized in that: Both sides of the bottom of the top plate (1) are connected to supporting side plates (2), one side of the two supporting side plates (2) is provided with a loading mechanism (8) and a unloading mechanism (3), one side of the bottom of the top plate (1) is provided with a seedling tray placement mechanism (7) for placing a seedling tray, one side of the supporting side plate (2) is provided with a through groove (10), and a conveyor belt (5) for conveying the seedling tray is connected in the through groove (10); The feeding mechanism (8) comprises a storage box (801) that moves in a vertical direction and is used for stacking and storing seedling trays. The storage box (801) has two symmetrically arranged moving grooves at its bottom, and a pushing plate (812) for pushing the seedling trays is slidably connected in the moving grooves. One side of the pushing plate (812) is connected to a moving plate (809) that can automatically reset, and the other side of the moving plate (809) is attached to a cam (804). When the pushing plate (812) pushes the seedling trays into the conveyor belt (5), it limits and blocks the seedling trays above, thereby achieving single-time orderly feeding.

2. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: Two symmetrically arranged moving slide bars (810) are connected to both sides of the bottom of the moving plate (809); two sliding holes are symmetrically opened on one side of the bottom of the material storage box (801); the moving slide bars (810) are slidably connected in the sliding holes; a second spring (811) is sleeved on the outer surface of the moving slide bar (810); and two sides of the second spring (811) are respectively connected to one side of the moving plate (809) and one side of the material storage box (801).

3. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: One side of the material storage box (801) is connected to an assembly plate (803), and a driving motor (802) is fixedly mounted on the top of the assembly plate (803) via a mounting plate. One end of the output shaft of the driving motor (802) is connected to a connecting shaft, and the other end of the connecting shaft extends to the other side of the assembly plate (803) and is connected to one side of a cam (804). Both sides of the bottom of the assembly plate (803) are connected to reinforcing plates (813), one side of the reinforcing plate (813) is connected to one side of the material storage box (801), and one side of the reinforcing plate (813) is in contact with one side of a pushing plate (812).

4. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: The storage box (801) is connected to a second screw seat (808) on both sides, one side of one of the supporting side plates (2) is connected to two symmetrically arranged fixed brackets (805), a second lifting screw (807) is rotatably connected inside the fixed bracket (805), the second lifting screw (807) is threadedly connected to the second screw seat (808), a second motor (806) is connected to the top of the fixed bracket (805), one end of the second lifting screw (807) extends to the other side of the fixed bracket (805) and is connected to one end of the output shaft of the second motor (806).

5. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: The seedling tray placement mechanism (7) comprises two symmetrically arranged connecting side plates (702), the tops of the two connecting side plates (702) are connected to two connecting plates (703), one side of the connecting side plates (702) is symmetrically provided with two transmission gears (704), one side of the transmission gear (704) is meshingly connected to a driving rack (711), a sliding groove is provided on the top of the driving rack (711), a fixed sliding rod (709) is slidably connected in the sliding groove, the top of the fixed sliding rod (709) is connected to a mounting seat (707), and the mounting seat ( One side of the fixed slide rod (709) is connected to one side of the connecting side plate (702); a first spring (708) is sleeved on the outer surface of the fixed slide rod (709); two ends of the first spring (708) are respectively connected to one side of the mounting seat (707) and one side of the driving rack (711); one side of the transmission gear (704) is rotatably connected to a rotating shaft; one end of the rotating shaft extends to the other side of the connecting side plate (702) and is connected to a driving screw (712); the outer surfaces of the two driving screws (712) are threadedly connected to the same supporting plate (705) for supporting the seedling tray.

6. A loading and unloading device for a forestry nursery bed according to claim 5, characterized in that: A fixed groove seat (710) is attached to one side of the driving rack (711), one side of the fixed groove seat (710) is connected to one side of the connecting side plate (702), a lifting cylinder (701) is connected to the top of the connecting plate (703), and the top of the lifting cylinder (701) is connected to the bottom of the top plate (1).

7. A loading and unloading device for a forestry nursery bed according to claim 5, characterized in that: A vertical plate (706) for limiting the position of the seedling tray is connected to one side of the top of the support plate (705), and a plurality of rolling balls (713) are arranged in a linear array on the support plate (705).

8. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: The unloading mechanism (3) comprises a lifting plate (302) capable of moving up and down, a disk collection box (301) is arranged above the lifting plate (302), moving wheels (307) are connected to the bottom of the disk collection box (301) on all sides, the moving wheels (307) are in contact with the top of the lifting plate (302), a plurality of disk storage slots (306) in a linear array are opened on one side of the disk collection box (301), limiting plates (308) are connected to both sides of the top of the lifting plate (302), one side of the limiting plate (308) is connected to a first screw seat (304), the first screw seat (304) is internally threadedly connected to a first lifting screw (303), both ends of the first lifting screw (303) are rotatably connected to a mounting member, one side of the mounting member is connected to the supporting side plate (2), a first motor (305) is fixedly installed on the top of the mounting member located at the top, one end of the first lifting screw (303) extends to the other side of the mounting member and is connected to one end of the output shaft of the first motor (305).

9. A loading and unloading device for a forestry nursery bed according to claim 8, characterized in that: The center position of the bottom of the closing box (301) is connected to a limit slot seat (309), a clamping block (310) is slidably connected in the limit slot seat (309), the bottom of the clamping block (310) is connected to the bottom of the lifting plate (302), and one side of the clamping block (310) is rotatably connected to a limit knob (311) via a rotating shaft.

10. A loading and unloading device for a forestry nursery bed according to claim 1, characterized in that: The bottom of the supporting side plate (2) is connected to a universal driving wheel (4), the bottom of the top plate (1) is slidably connected to a mobile lifting device (6), and the top of the mobile lifting device (6) is connected to a clamping claw (9) for grabbing the seedling tray.

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