A tray supply device with upper support type tray separation

Abstract

The present invention relates to the technical field of seedling raising and sowing, and in particular to a seedling raising tray supply device with an upper-supporting type of tray. The seedling raising tray supply device with an upper-supporting type of tray comprises a frame, a seedling tray transmission unit, a tray supply bin, a residual tray lifting and separation unit, and a control unit. The tray lifting and separation mechanism consists of a tray lifting and separation assembly, a limiter, a transverse axis, and a driving member that provides horizontal power; the tray lifting and separation assembly comprises a tray rod and a reset spring for resetting the tray rod; the tray rod is provided with a fixed portion, a working portion, and a limiter; the fixed portion is rotatably connected to the transverse axis around an axis; the limiter is arranged above the fixed portion and cooperates with the limiter. The seedling raising tray supply device with an upper-supporting type of tray provided by the present invention avoids the need for a dedicated person to continuously add trays as needed in traditional devices, and effectively improves the auxiliary function of the device for the staff.

Description

Technical Field

[0001] The invention relates to the technical field of seedling raising and sowing, and in particular to a seedling raising tray supply device with an upper supporting type divided tray. Background Art

[0002] During the sowing process on the mechanized tray seeding and sowing line of rice, it is usually necessary to continuously provide the seeding production line with seeding trays. This process is completed by the tray supply device. The usual tray supply device realizes the supply of trays to the sowing production line by releasing a group of seedling trays placed in the tray bin one by one. In this form of tray supply process, when it is necessary to add new seedling trays to the tray supply device, they are usually manually transported to the tray supply device and stacked from top to bottom into the tray bin to replenish the trays. Special personnel are required to continuously add trays as needed at any time to ensure that the tray bin is not broken, and it is difficult to achieve automatic replenishment. Summary of the Invention

[0003] The present invention provides a seedling raising tray supply device with an upper supporting type tray

[0004] The specific technical solutions are as follows:

[0005] A seedling tray supply device with an upper-support type tray separation comprises a frame, a seedling tray conveying unit mounted on the frame and connected to a downstream sowing production line, a tray supply bin, a residual tray lifting and separation unit, and a control unit; the tray supply bin is located above the seedling tray conveying unit and, together with the seedling tray conveying unit, forms a temporary seedling tray storage area for holding stacked seedling trays; the residual tray lifting and separation unit comprises a pair of tray lifting and separation mechanisms located on both sides of the temporary seedling tray storage area;

[0006] The tray lifting and separation mechanism comprises a tray lifting and separation assembly, a limiting member, a transverse shaft, and a driving member providing horizontal power; the tray lifting and separation assembly comprises a tray rod and a return spring for returning the tray rod to its original position; the tray rod comprises a fixed portion, a working portion, and a limiting portion; the fixed portion is rotatably connected to the transverse shaft around an axis; the limiting portion is arranged above the fixed portion and cooperates with the limiting rod;

[0007] The driving member drives the working part to reciprocate between the starting position, the release position and the lifting position; at the release position, the working part is in a horizontal state and extends to the bottom of the outer edge of the secondary chassis of the seedling tray group, and the limiting part and the limiting rod are just in contact; at the lifting position, the working part is tilted in the first quadrant centered on the fixed part due to the external force of the limiting rod, and due to the rotation in the first quadrant, the horizontal linear motion of the tray rod will be changed into an L-shaped motion trajectory, and the front end of the working part is against the lower surface of the outer edge of the secondary chassis in the seedling tray group; the horizontal distance that the driving member drives the working part to move from the release position to the lifting position must be equal to the horizontal displacement of the front end of the working part when it rotates from the release position to the lifting position.

[0008] Preferably, fixedly connected driving members are installed on both sides of the top of the frame, and a transverse axis rod is installed on the output end of the driving member, pallet rods are provided at both ends of the transverse axis rod, and the pallet rod is composed of a working part, a limiting part, a fixed part and a top block, and a rotatably connected fixed part is installed at both ends of the transverse axis rod, and a fixedly connected limiting part is installed on the top of the fixed part, a fixedly connected working part is installed on the limiting part, and a top block is provided at one end of the working part.

[0009] Preferably, a limiting member is installed on the transverse axis rod, and the limiting member is composed of a limiting rod, a fixed ring body and a limiting protrusion. The two ends of the transverse axis rod are installed with a rotatably connected fixed ring body, and the top of the fixed ring body is installed with a fixedly connected limiting rod, the bottom of the fixed ring body is installed with a fixedly connected limiting protrusion, and the top of the limiting rod is in contact with the bottom of the working part of the pallet rod.

[0010] Preferably, a return spring is sleeved on the limiting member, one end of the return spring is connected to the limiting member, and the other end of the return spring is fixedly connected to one side of the pallet rod.

[0011] Preferably, fixedly connected tray supply bins are installed on both sides of the top of the frame, and the tray supply bins are located above the seedling tray conveying unit. The tray supply bins are composed of a frame surrounded by a front frame and two side frames on three sides, and a limiting channel is provided on the rear side of the tray supply bin.

[0012] Preferably, the seedling tray conveying unit is provided with a conveying belt and a power system, and the seedling tray conveying unit is located on a frame, and the conveying belt is located on the frame between two tray-lifting separation assemblies.

[0013] Preferably, a fixedly connected control unit is mounted on the frame, and the control unit is connected to all electrical appliances on the tray supply device via wires.

[0014] Preferably, the seedling raising tray group is located in a tray supply bin, and the seedling raising tray group includes a lower chassis and a secondary chassis. The lower chassis is placed in the tray supply bin, and a plurality of secondary chassis are stacked on the lower chassis.

[0015] Preferably, the frame 1 is composed of a plurality of metal rods, and a plurality of legs are provided at the bottom of the frame 1.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention utilizes a conveyor belt to convey the seedling tray group to the supply tray bin, and the telescopic movement of the driving member drives the tray rod to reciprocate between the tray supporting position and the tray releasing position. In the process of pushing the tray rod, one end of the tray rod will abut against the upper and lower parts of the sub-chassis above the lower chassis. Then, as the driving member continues to push, the limit parts of the tray rod are stuck on the two side frames of the supply tray bin. At this time, since the limit parts of the tray rod are stuck on the two side frames of the supply tray bin, as the driving member continues to push, the tray rod will rotate around the horizontal axis rod, and one end of the tray rod will tilt, lifting the sub-chassis, so that the sub-chassis and the above seedling trays in the seedling tray group in the supply tray bin are lifted and separated from the chassis, leaving only the bottom seedling tray on the conveyor belt. Then, the conveyor belt is opened, and the conveyor belt is used to convey the lower chassis to the sowing production line. On the production line, the driving component then contracts, driving the pallet rod to separate from the sub-chassis. At the same time, the limiting force on the pallet rod disappears, and the reset spring cooperates with the limiting part to drive the pallet rod back to its original position. At this time, the sub-chassis at the bottom of the seedling tray group becomes the lower chassis, falls on the conveyor belt, and repeats the previous action until the seedling tray group is completely sent out. In this work, the pallet rod is under the dual action of the linear motion of the horizontal telescopic motion of the driving part and the external force of the limiting rod rotating in the first quadrant centered on the fixed part. The top of the pallet rod forms an L-shaped motion trajectory at the contact position with the edge of the sub-chassis, lifting the sub-chassis and the above seedling trays to complete the separation from the chassis, avoiding the need for special personnel to continuously add and complete according to needs in traditional devices, effectively improving the auxiliary function of the device to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2. A diagram of a tray supply device with automatic tray refilling for a top-up tray distribution system according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the positions of the tray conveying section, tray supply bin, and remaining tray lifting unit in an embodiment of the present invention;

[0020] Figure 3 This is a structural diagram of a disk supply bin in an embodiment of the present invention;

[0021] Figure 4 This is a structural schematic diagram of a residual tray lifting and separation unit in an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the plate lifting and separation component in the residual plate lifting and separation unit in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the tray rod in the residual tray lifting and separation unit in an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the limiting member in the residual tray lifting and separating unit in an embodiment of the present invention;

[0025] Figure 8 This is a diagram showing the initial position of the residual tray lifting separation unit in an embodiment of the present invention;

[0026] Figure 9 Schematic diagram of the process of the residual tray lifting the tray rod in the separation unit and entering the upper position of the lower chassis in an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the process in which the tray rods in the residual tray lifting separation unit lift the secondary chassis and the above seedling trays in an embodiment of the present invention.

[0028] Figure numerals: 1. Frame; 2. Seedling tray conveying unit; 21. Conveyor belt; 3. Tray supply bin; 31. Front end frame; 32. Two side frames; 33. Limiting channel; 4. Remaining tray lifting and separation unit; 41. Tray lifting and separation assembly; 42. Driving member; 43. Horizontal axis rod; 44. Tray rod; 441. Working part; 442. Limiting part; 443. Fixing part; 444. Top block; 45. Limiting member; 451. Limiting rod; 452. Fixed ring; 453. Limiting protrusion; 46. Return spring; 5. Control unit; 6. Seedling tray group; 61. Lower chassis; 62. Sub-chassis. DETAILED DESCRIPTION

[0029] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0030] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] See also Figures 1 to 10 An embodiment of the present invention provides a seedling tray supply device with an upper support type separation tray, which includes: a frame 1, a seedling tray conveying unit 2, a tray supply bin 3, a residual tray lifting and separation unit 4 and a control unit 5.

[0032] In the embodiments of the present invention, see Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7, comprising a frame 1 and a seedling tray conveying unit 2 mounted on the frame 1 and connected to a downstream sowing production line, a tray supply bin 3, a residual tray lifting and separating unit 4, and a control unit 5; the tray supply bin 3 is arranged above the seedling tray conveying unit 2, and together with the seedling tray conveying unit 2, forms a temporary seedling tray storage area for holding stacked seedling tray groups 6; the residual tray lifting and separating unit 4 is composed of a pair of tray lifting and separating mechanisms arranged on both sides of the temporary seedling tray storage area;

[0033] The tray lifting and separation mechanism comprises a tray lifting and separation assembly 41, a limiting member 45, a transverse shaft 43, and a driving member 42 providing horizontal power. The tray lifting and separation assembly 41 includes a tray rod 44 and a return spring 46 for returning the tray rod 44 to its original position. The tray rod 44 has a fixed portion 443, a working portion 441, and a limiting portion 442. The fixed portion 443 is rotatably connected to the transverse shaft 43 about its axis. The limiting portion 442 is disposed above the fixed portion 443 and cooperates with the limiting rod 451.

[0034] The driving member 42 drives the working part 441 to reciprocate between the starting position, the release position and the supporting position; at the release position, the working part 441 is in a horizontal state and extends to the bottom of the outer edge of the secondary chassis 62 of the seedling tray group 6, and the limiting part 442 is just in contact with the limiting rod 451; at the supporting position, the working part 441 is tilted in the first quadrant with the fixed part 443 as the center due to the external force of the limiting rod 451, and the rotation in the first quadrant will cause the horizontal linear motion of the tray rod 44 to be changed into an L-shaped motion trajectory, and the front end of the working part 441 is against the lower surface of the outer edge of the secondary chassis 62 in the seedling tray group 6; the horizontal distance that the driving member 42 drives the working part 441 to move from the release position to the supporting position must be equal to the horizontal displacement of the front end of the working part 441 from the release position to the supporting position.

[0035] It should be noted that: the frame 1 is the main part of the load-bearing base of the entire device, which provides an installation position for the seedling tray conveying unit 2, the tray supply bin 3, the remaining tray lifting and separating unit 4, the control unit 5 and the seedling tray group 6. The tray supply bin 3 cooperates with the conveyor belt 21 to convey the seedling tray group 6 through the conveyor belt 21. At the same time, the seedling tray group 6 can be limited to make it more stable during the conveying process. There are two tray lifting and separating components 41, which are respectively located on both sides of the top of the frame 1. Both sides of the seedling tray can be lifted at the same time, making the seedling tray more stable when lifted;

[0036] It should also be noted that the driving member 42 is an electric push rod. The output end of the driving member 42 is fixedly docked with the transverse rod 43. When the driving member 42 is extended, the transverse rod 43 is used to drive the limiting member 45 and the tray rod 44 to move horizontally. When the limiting portion 442 of the tray rod 44 reaches the two side frames 32, as the driving member 42 continues to extend, the tray rod 44 will rotate along the transverse rod 43, thereby lifting the sub-chassis 62. The fixing portion 443 is the connecting portion at both ends of the tray rod 44 and the transverse rod 43, and is rotatably connected to the two ends of the transverse rod 43.

[0037] It should also be noted that: when the driving member 42 is extended, not only the working part 441 of the pallet rod 44 is moved to the bottom of the sub-chassis 62, but also the pallet rod 44 is lifted up, and the working part 441 of the pallet rod 44 is used to lift the sub-chassis 62 above the lower chassis 61 to complete the separation of the seedling tray group 6. The limiting part 442 mainly cooperates with the two side frames 32 to facilitate the lifting of the pallet rod 44, and the working part 441 is used to lift and separate the seedling tray group 6.

[0038] In the embodiments of the present invention, see Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 , fixedly connected driving members 42 are installed on both sides of the top of the frame 1, and a horizontal axis rod 43 is installed at the output end of the driving member 42, and pallet rods 44 are provided at both ends of the horizontal axis rod 43, and the pallet rod 44 is composed of a working part 441, a limiting part 442, a fixing part 443 and a top block 444, and a rotatably connected fixing part 443 is installed at both ends of the horizontal axis rod 43, and a fixedly connected limiting part 442 is installed on the top of the fixing part 443, a fixedly connected working part 441 is installed on the limiting part 442, and a top block 444 is provided at one end of the working part 441.

[0039] It should also be noted that: the driving member 42 is an electric push rod. After power is turned on, the driving member 42 is controlled to extend, so that it uses the horizontal axis rod 43 to drive the pallet rod 44 to move horizontally, driving the working part 441 of the pallet rod 44 to move to the bottom of the sub-chassis 62 above the lower chassis 61. When the working part 441 of the pallet rod 44 moves to the bottom of the sub-chassis 62, the limiting part 442 of the pallet rod 44 will rest on the two side frames 32 of the tray supply bin 3. As the driving member 42 continues to extend, the limiting part 442 will limit the pallet rod 44, so that the pallet rod 44 rotates along the horizontal axis rod 43 through the fixing part 443. When the pallet rod 44 rotates, its working part 441 will lift up and lift the sub-chassis 62. When the working part 441 is lifted up, the top block 444 will become horizontal, and the top block 444 can be used to lift the sub-chassis 62 more stably.

[0040] In the embodiments of the present invention, see Figure 5 and Figure 7 A limiting member 45 is installed on the horizontal axis rod 43, and the limiting member 45 is composed of a limiting rod 451, a fixed ring body 452 and a limiting protrusion 453. The two ends of the horizontal axis rod 43 are installed with a rotatably connected fixed ring body 452, and the top of the fixed ring body 452 is installed with a fixedly connected limiting rod 451, and the bottom of the fixed ring body 452 is installed with a fixedly connected limiting protrusion 453, and the top of the limiting rod 451 is in contact with the bottom of the working part 441 of the pallet rod 44.

[0041] It should also be noted that: when the driving member 42 contracts, the horizontal axis 43 will be used to drive the pallet rod 44 to move toward the outside of the frame 1, so that the limiting force on the pallet rod 44 between the two side frames 32 and the limiting part 442 disappears. At this time, the return spring 46 drives the pallet rod 44 to rotate along the horizontal axis 43 and return it to its original position. When the pallet rod 44 returns to its original position, the working part 441 will fit on the limiting rod 451, and the limiting member 45 is fixedly connected to one end of the return spring 46. Therefore, the limiting rod 451 will limit the bottom of the pallet rod 44, so that the pallet rod 44 is always in a horizontal state.

[0042] In the embodiments of the present invention, see Figure 5 A return spring 46 is sleeved on the limit member 45 , one end of the return spring 46 is connected to the limit member 45 , and the other end of the return spring 46 is fixedly connected to one side of the tray rod 44 .

[0043] It should also be noted that the return spring 46 is a torsion spring. When the pallet rod 44 rotates along the horizontal axis rod 43, the return spring 46 will twist and tighten. When the pallet rod 44 leaves the tray supply bin 3, the limiting force on the pallet rod 44 disappears, and the return spring 46 will rebound and drive the pallet rod 44 back to its original position, so that the pallet rod 44 becomes horizontal.

[0044] In the embodiments of the present invention, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 and Figure 10 , fixedly connected tray supply bins 3 are installed on both sides of the top of the frame 1, and the tray supply bin 3 is located above the seedling tray conveying unit 2. The tray supply bin 3 is composed of a frame surrounded by a front end frame 31 and two side frames 32 on three sides, and a limiting channel 33 is provided on the rear side of the tray supply bin 3.

[0045] It should also be noted that the spacing between the two side frames 32 of the tray supply bin 3 is slightly wider than the width of the lower chassis 61 and the sub-chassis 62 of the seedling tray group 6. At the same time, there is a certain gap between the bottom of the front frame 31 and the conveyor belt 21. The gap is greater than the height of one seedling tray and less than the height of two seedling trays, so that in the process of transporting the seedling trays, only one seedling tray can pass through, preventing the problem of transporting multiple seedling trays at the same time during the transportation of the seedling trays.

[0046] In the embodiments of the present invention, see Figure 1 and Figure 2 The seedling tray conveying unit 2 is provided with a conveying belt 21 and a power system, and the seedling tray conveying unit 2 is located on the frame 1, and the conveying belt 21 is located on the frame 1 between the two tray lifting and separating components 41.

[0047] It should also be noted that there are two seedling tray conveying units 2, divided into front and rear ends, and the conveying belt 21 is composed of a motor, a shaft and a belt. The principle is: turn on the motor, use the motor to use the shaft to drive the electric belt to rotate, and use the moving belt to transport the seedling tray.

[0048] In the embodiments of the present invention, see Figure 1 and Figure 7 A fixedly connected control unit 5 is installed on the frame 1, and the control unit 5 is connected to all electrical appliances on the tray supply device through wires.

[0049] It should also be noted that the control unit 5 is composed of a housing and control elements. All electrical appliances on the device are controlled by the control elements, and the housing provides protection for the control elements inside.

[0050] In the embodiments of the present invention, see Figure 1 The seedling raising tray group 6 is located in the tray supply bin 3, and the seedling raising tray group 6 includes a lower chassis 61 and a secondary chassis 62. The tray supply bin 3 is provided with the lower chassis 61, and a plurality of secondary chassis 62 are stacked on the lower chassis 61.

[0051] It should also be noted that the lower chassis 61 and the sub-chassis 62 of the seedling tray group 6 are the same size. When transporting the seedling tray, the lower chassis 61 and the sub-chassis 62 are separated first. At this time, the lower chassis 61 will move with the conveyor belt 21, and the other sub-chassis 62 will remain between the pallet rods 44. After the lower chassis 61 is transported away, the sub-chassis 62 at the bottom of the seedling tray group 6 becomes the lower chassis 61, ready for the next transportation.

[0052] In the embodiments of the present invention, see Figure 1 The frame 1 is composed of multiple metal rods, and a plurality of supporting legs are provided at the bottom of the frame 1.

[0053] It should also be noted that the frame 1 is a steel frame structure, which is simple to assemble and has long instructions for use. At the same time, it has a large load-bearing capacity. The frame 1 cooperates with the support legs to make the frame 1 more stable and can bear the weight of other component structures on the tray supply device, making the device more stable during operation.

[0054] The working principle of the upper support type seedling tray supply device provided by the present invention is as follows:

[0055] First, the device is installed in the designated working position, and then the electrical appliances on the device are powered on, so that the control unit 5 can be used to control the electrical appliances later. The control unit 5 controls the conveyor belt 21 to run, the rear section of the conveyor belt 21 is started, and the internal motor is used to drive the belt to rotate, and a group of seedling trays 6 located on the rear section of the conveyor belt 21 is transported to the front section of the conveyor belt 21 and enter the tray supply bin 3.

[0056] After that, the seedling tray group 6 is prepared to be separated, the driving member 42 is opened to drive the horizontal shaft rod 43 to move, and the horizontal shaft rod 43 drives the two trays to lift the separation assembly 41 and move to the side close to the side wall of the seedling tray. As the tray rod 44 continues to move, the top block 444 of the tray rod 44 will move to under the sub-chassis 62 at the top of the lower chassis 61 until the limit parts 442 of the tray rod 44 contact the two side frames 32. At this time, the driving member 42 continues to provide a forward thrust to make the tray rod 44 continue to move forward. Since the two side frames 32 block the path for the limit parts 442 of the tray rod 44 to continue to move forward, the tray rod 44 continues to move forward while its working part 441 will start to rotate upward, and the top block 444 of the tray rod 44 will move forward and upward at the same time, which can lift all sub-chassis 62 except the lower chassis 61, and the lower chassis 61 located at the bottom of the seedling tray group 6 will be sent to the external equipment by the front conveyor belt 21 for sowing.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A seedling tray supply device with an upper support type tray separation, comprising a frame (1), a seedling tray conveying unit (2) mounted on the frame (1) and connected to a downstream sowing production line, a tray supply bin (3), a residual tray lifting and separating unit (4), and a control unit (5); the tray supply bin (3) is arranged above the seedling tray conveying unit (2) and, together with the seedling tray conveying unit (2), forms a temporary seedling tray storage area for containing stacked seedling tray groups (6); the residual tray lifting and separating unit (4) is composed of a pair of tray lifting and separating mechanisms arranged on both sides of the temporary seedling tray storage area; Its characteristics are: The tray lifting and separation mechanism is composed of a tray lifting and separation assembly (41), a limiting member (45), a transverse shaft (43) and a driving member (42) for providing horizontal power; the tray lifting and separation assembly (41) includes a tray rod (44) and a return spring (46) for returning the tray rod (44); the tray rod (44) is provided with a fixing portion (443), a working portion (441) and a limiting portion (442); the fixing portion (443) is rotatably connected to the transverse shaft (43) around an axis; the limiting portion (442) is arranged above the fixing portion (443) and cooperates with the limiting rod (451); The driving member (42) drives the working part (441) to reciprocate between the starting position, the release position and the lifting position; in the release position, the working part (441) is in a horizontal state and extends to the lower side of the outer edge of the secondary chassis (62) of the seedling raising tray group (6), and the limiting part (442) and the limiting rod (451) are in contact; in the lifting position, the working part (441) is tilted in the first quadrant centered on the fixed part (443) due to the external force of the limiting rod (451), and since the rotation in the first quadrant causes the horizontal linear motion of the tray rod (44) to be converted into an L-shaped motion trajectory, the front end of the working part (441) abuts against the lower surface of the outer edge of the secondary chassis (62) in the seedling raising tray group (6); the horizontal distance that the driving member (42) drives the working part (441) to move from the release position to the lifting position must be equal to the horizontal displacement of the front end of the working part (441) from the release position to the lifting position.

2. The upper support type seedling raising tray supply device according to claim 1, characterized in that: Both sides of the top of the frame (1) are installed with fixedly connected driving members (42), and the output end of the driving member (42) is installed with a transverse axis rod (43), both ends of the transverse axis rod (43) are provided with a pallet rod (44), and the pallet rod (44) is composed of a working part (441), a limiting part (442), a fixing part (443) and a top block (444), both ends of the transverse axis rod (43) are installed with a rotatably connected fixing part (443), and the top of the fixing part (443) is installed with a fixedly connected limiting part (442), the limiting part (442) is installed with a fixedly connected working part (441), and one end of the working part (441) is provided with a top block (444).

3. The upper supporting type seedling raising tray supply device according to claim 2, characterized in that: A limiting member (45) is installed on the transverse axis rod (43), and the limiting member (45) is composed of a limiting rod (451), a fixed ring body (452) and a limiting protrusion (453). The two ends of the transverse axis rod (43) are installed with a rotatably connected fixed ring body (452), and the top of the fixed ring body (452) is installed with a fixedly connected limiting rod (451), and the bottom of the fixed ring body (452) is installed with a fixedly connected limiting protrusion (453), and the top of the limiting rod (451) contacts the bottom of the working part (441) of the tray rod (44).

4. The upper supporting type seedling raising tray supply device according to claim 1, characterized in that: A return spring (46) is sleeved on the limiting member (45), one end of the return spring (46) is connected to the limiting member (45), and the other end of the return spring (46) is fixedly connected to one side of the tray rod (44).

5. The upper supporting type seedling raising tray supply device according to claim 4, characterized in that: A fixedly connected tray supply bin (3) is installed on both sides of the top of the frame (1), and the tray supply bin (3) is located above the seedling tray conveying unit (2). The tray supply bin (3) is composed of a frame surrounded by a front frame (31) and two side frames (32) on three sides, and a limiting channel (33) is provided on the rear side of the tray supply bin (3).

6. The upper supporting type seedling raising tray supply device according to claim 1, characterized in that: The seedling tray conveying unit (2) is provided with a conveying belt (21) and a power system, and the seedling tray conveying unit (2) is located on the frame (1), and the conveying belt (21) is located on the frame (1) between two tray lifting and separating assemblies (41).

7. The upper supporting type seedling raising tray supply device according to claim 1, characterized in that: A fixedly connected control unit (5) is installed on the frame (1), and the control unit (5) is connected to all electrical appliances on the tray supply device via wires.

8. The upper supporting type seedling raising tray supply device according to claim 1, characterized in that: The seedling raising tray group (6) is located in the tray supply bin (3), and the seedling raising tray group (6) comprises a lower chassis (61) and a secondary chassis (62). The tray supply bin (3) is provided with the lower chassis (61), and a plurality of secondary chassis (62) are stacked on the lower chassis (61).

9. The upper supporting type seedling raising tray supply device according to claim 1, characterized in that: The frame (1) is composed of a plurality of metal rods, and a plurality of supporting legs are provided at the bottom of the frame (1).

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