Conveying mechanism of green Chinese onion harvester
By designing mounting racks, T-shaped mounting plates, transportation components and turn-over components in the green onion harvester, the problem of extrusion and damage of green onion during transportation is solved, and the orderly transportation and soil cleaning of green onion is achieved, improving the quality and processing efficiency of green onion.
Patent Information
- Application Number
- CN202510907639.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-08-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The conveying mechanism of the existing green onion harvester cannot achieve orderly distribution and transportation of green onion one by one, resulting in the easy squeeze and entanglement of green onion during the transportation process, causing damage and increasing the difficulty of subsequent processing.
A conveying mechanism including a mounting frame, a T-shaped mounting plate, a transportation component and a turning component is designed. Through the coordination of the active roller, a driven roller and a conveying belt, combined with the design of the fork and a split plate, the green onion can be lifted and distributed and transported one by one, and the soil cleaning effect is enhanced through the coordination of auxiliary columns and connecting springs.
The orderly transportation of green onions is achieved one by one, reducing squeezing damage, improving the quality and subsequent processing efficiency of green onions, and reducing the difficulty of sorting and baling.
Smart Images

Figure CN120476845A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of conveying mechanisms, and in particular relates to a conveying mechanism of a green onion harvester. Background Art
[0002] Green onions possess unique edible and medicinal properties. Green onions are a single-stemmed bulbous crop, primarily valued for their cylindrical whites, which are juicy, crisp, and fragile. Furthermore, green onions are commonly cultivated with high soil cover, leaving the whites entirely encased in soil. This makes harvesting extremely challenging, requiring large quantities of green onions to be transported from the field to subsequent processing. The conveying mechanisms on many existing harvesters are unable to achieve this objective, individually and orderly, transport of green onions. Traditional linear conveyor designs simply transport green onions from the excavation site to the collection point. During transport, the lack of precise positioning and independent control of each green onion leads to squeezing and entanglement of green onions. This not only easily breaks the green onions, especially in delicate areas like the roots, significantly impacting their quality and market value, but also complicates subsequent sorting and bundling processes.
[0003] Therefore, we propose a conveying mechanism of a green onion harvester to solve the problem. Summary of the Invention
[0004] (1) Technical problems to be solved In view of the deficiencies of the prior art, the purpose of the present invention is to provide a conveying mechanism for a green onion harvester, which aims to solve the technical problem that green onions are transported in piles under the prior art, which easily causes extrusion damage.
[0005] (2) Technical solution In order to solve the above technical problems, the present invention provides a conveying mechanism of a green onion harvester, comprising a mounting frame and a T-shaped mounting plate fixedly installed on the top surface of the mounting frame. The number of the mounting frame and the T-shaped mounting plate are both two, and the two mounting frames and the T-shaped mounting plates are symmetrically arranged in front and rear positions. A transport component is fixedly installed between the two mounting frames, and the transport component is connected to a turning component for turning over the harvested green onions to avoid piling up, and can also remove the dirt on the green onions. The turning component is connected to a distribution conveying component for distributing and transporting the green onions one by one.
[0006] Preferably, the transport assembly includes an active roller and a driven roller, and the active roller and the driven roller are both arranged in the middle position between the two mounting frames. The inner wall fixed sleeve of the active roller is provided with a first mounting shaft, and the two ends of the first mounting shaft are rotatably arranged with the inner surface of the mounting frame through bearings. The active roller and the driven roller are connected by a conveyor belt transmission, and the inner wall fixed sleeve of the driven roller is provided with a second mounting shaft, and the two ends of the second mounting shaft are rotatably arranged with the inner surface of the mounting frame through bearings.
[0007] Furthermore, a tensioning pulley is provided below the conveyor belt.
[0008] Furthermore, a limit baffle is provided above the rear end of the conveyor belt, and the surface of the limit baffle is fixedly mounted to the end of the T-shaped mounting plate. There are two limit baffles, and the two limit baffles are symmetrically distributed in the front and rear positions with the center line of the front of the conveyor belt as the axis of symmetry.
[0009] Furthermore, the shifting assembly includes a first driving wheel and a first driven wheel, the first driving wheel is fixedly sleeved on the outer wall of the first mounting shaft, the first driving wheel and the first driven wheel are connected by a first belt transmission, the inner wall of the first driven wheel is sleeved with a third mounting shaft, the end of the third mounting shaft is rotatably arranged with the first mounting plate through a bearing, the first mounting plate is fixedly mounted on the top surface of the T-shaped mounting plate, the end surface of the third mounting shaft has a cross-shaped groove, the cross-shaped groove is slidably engaged with a cross-shaped rod, the outer surface of the third mounting shaft is sleeved with a sliding column, the inner wall of the sliding column is fixedly installed with a cross-shaped block, the cross-shaped block and the cross-shaped rod are fixedly installed, and the outer wall of the third mounting shaft is fixedly installed with a shift fork.
[0010] Furthermore, the number of the shift forks is three, the three shift forks are located between two limit baffles, and the three shift forks are made of rubber material.
[0011] Furthermore, the flipping assembly also includes an auxiliary column and a connecting spring, the end of the auxiliary column is fixedly installed on the surface of the first mounting plate, the end of the auxiliary column away from the first mounting plate is in contact with the end of the sliding column, and the end surfaces of the auxiliary column and the sliding column in contact with each other are both inclined, the connecting spring is arranged in the cross-shaped groove, one end of the connecting spring is fixedly installed on the end of the cross-shaped rod, and the end of the connecting spring away from the cross-shaped rod is fixedly installed on the inner wall of the cross-shaped groove.
[0012] Furthermore, the distribution conveying assembly includes a second driving wheel and a second driven wheel, the second driving wheel is fixedly mounted on the outer wall of the third mounting shaft, the second driving wheel and the second driven wheel are connected by a second belt transmission, the inner wall fixed sleeve of the second driven wheel is provided with a fourth mounting shaft, the end of the fourth mounting shaft is rotatably set with the second mounting plate through a bearing, the second mounting plate is fixedly mounted on the top surface of the T-shaped mounting plate, the outer wall fixed sleeve of the fourth mounting shaft is provided with a first gear, the first gear is vertically meshed with a second gear, the inner wall fixed sleeve of the second gear is provided with a connecting shaft, the top end of the connecting shaft is rotatably set with the lower surface of the L-shaped mounting plate through a bearing, the end of the L-shaped mounting plate is fixedly mounted on the top surface of the T-shaped mounting plate, the bottom end of the connecting shaft is fixedly installed with a shifting plate, and the bottom surface of the shifting plate is in contact with the surface of the conveying belt.
[0013] Furthermore, two symmetrically arranged limit conveying plates are provided on the right side of the shifting plate, the limit conveying plates are fixedly installed on the inner surface of the limit baffle, and the bottom surfaces of the two limit conveying plates are both provided in contact with the surface of the conveyor belt.
[0014] (3) Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, when the harvester is working, when the harvester is started, the transport components will quickly and synchronously operate, and the conveyor belt will also start a stable transport process. At this time, the first installation shaft begins to rotate in an orderly manner, driving the first driving wheel to rotate. The rotation of the first driving wheel transmits power through the first belt to drive the first driven wheel, thereby allowing the third installation shaft to also obtain the rotation force. The sliding column is sleeved on the outside of the third installation shaft, and the two are tightly connected by a cross-shaped rod and a cross-shaped block. When the third installation shaft rotates, the sliding column also rotates like a shadow, and the fork installed on the outer surface of the sliding column flips the green onions upward. Under the action of the fork, the green onions that were originally piled together are gently separated. At the same time, most of the soil attached to the surface of the green onions also falls off, which reduces a lot of burden for subsequent processing work.
[0015] 2. In the present invention, the auxiliary column and the sliding column are fitted with each other at an inclined surface, and a connecting spring is provided, so that the reciprocating motion of the sliding column can be realized, so that the fork installed on the sliding column can also start to swing. The swing of the fork can enhance the cleaning effect of the dirt on the surface of the green onion. The dirt attached to the green onion is shaken off little by little, making the green onion cleaner during subsequent processing, greatly improving the overall work efficiency and quality.
[0016] 3. In the present invention, after the green onions are successfully spread apart, they enter the distribution and transportation component in an orderly manner. At this time, the third installation shaft rotates continuously and stably. The arrangement of the second driving wheel, the second belt and the second driven wheel can realize the rotation of the fourth installation shaft. Since the first gear and the second gear are engaged with each other, the connecting shaft can be rotated accordingly, and the shifting plate at the end of the connecting shaft also starts to rotate. During the rotation process, the shifting plate cleverly performs a partial spreading operation on the green onions, further dispersing the originally relatively concentrated green onions. Subsequently, the green onions come between the two limiting transport plates, accurately controlling the forward path of the green onions, and finally realizing the one-by-one transportation of the green onions, laying a good foundation for subsequent processing procedures. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a conveying mechanism of a green onion harvester according to the present invention; Figure 2 The invention relates to a conveying mechanism of a green onion harvester Figure 1 Schematic diagram of the structure from the right perspective; Figure 3 The invention relates to a conveying mechanism of a green onion harvester Figure 1 Schematic diagram of the top view structure; Figure 4 This is a structural schematic diagram of a turning component in a conveying mechanism of a green onion harvester according to the present invention; Figure 5 The invention relates to a conveying mechanism of a green onion harvester Figure 4 Schematic diagram of local structure decomposition in ; Figure 6 This is a schematic structural diagram of a distributed conveying component in a conveying mechanism of a green onion harvester according to the present invention; Figure 7 The invention relates to a conveying mechanism of a green onion harvester Figure 1 Schematic diagram of the front plan structure.
[0018] 81. Second driving wheel; 82. Second belt; 83. Second driven wheel; 84. Fourth mounting shaft; 85. First gear; 86. Second gear; 87. Connecting shaft; 88. Diverting plate; 89. Limiting conveying plate; 9. Second mounting plate; 10. Cross groove. DETAILED DESCRIPTION
[0019] This specific embodiment is a conveying mechanism of a green onion harvester, and its structural diagram is as follows Figure 1-7 As shown, the conveying mechanism of the green onion harvester includes a mounting frame 1 and a T-shaped mounting plate 2 fixedly mounted on the top surface of the mounting frame 1. There are two mounting frames 1 and two T-shaped mounting plates 2, and the two mounting frames 1 and T-shaped mounting plates 2 are symmetrically arranged in front and back positions.
[0020] In this embodiment, if Figure 1 and Figure 2 As shown, a transport assembly 6 is fixedly installed between the two mounting frames 1 .
[0021] Specifically, the transport assembly 6 includes an active roller 61 and a driven roller 64. The active roller 61 and the driven roller 64 are both arranged in the middle position between the two mounting frames 1. The inner wall fixed sleeve of the active roller 61 is provided with a first mounting shaft 63. The two ends of the first mounting shaft 63 are rotatably arranged with the inner surface of the mounting frame 1 through bearings. The active roller 61 and the driven roller 64 are connected by a conveyor belt 62. The inner wall fixed sleeve of the driven roller 64 is provided with a second mounting shaft 65. The two ends of the second mounting shaft 65 are rotatably arranged with the inner surface of the mounting frame 1 through bearings.
[0022] In this embodiment, it should be noted that a tensioning wheel 66 is provided below the conveyor belt 62. The tensioning wheel 66 can automatically adjust the tension of the conveyor belt 62 to prevent loosening or excessive tension due to long-term use.
[0023] In some embodiments of the present invention, a limit baffle 3 is provided above the rear end of the conveyor belt 62. The surface of the limit baffle 3 is fixedly mounted to the end of the T-shaped mounting plate 2. There are two limit baffles 3. The two limit baffles 3 are symmetrically distributed at the front and rear positions with the center line of the front of the conveyor belt 62 as the axis of symmetry. Here, by providing the limit baffles 3 at the front and rear positions of the conveyor belt 62, green onions can be prevented from falling from the front and rear of the conveyor belt 62.
[0024] In this embodiment, if Figure 4 As shown, the transport component 6 is connected to a turning component 7 for turning over the harvested green onions to avoid piling up, and also for removing the dirt on the green onions.
[0025] Specifically, the flip assembly 7 includes a first driving wheel 71 and a first driven wheel 73. The first driving wheel 71 is fixedly sleeved on the outer wall of the first mounting shaft 63. The first driving wheel 71 and the first driven wheel 73 are connected by a first belt 72. The inner wall of the first driven wheel 73 is sleeved with a third mounting shaft 74. The end of the third mounting shaft 74 is rotatably arranged with the first mounting plate 4 through a bearing. The first mounting plate 4 is fixedly mounted on the top surface of the T-shaped mounting plate 2. The end face of the third mounting shaft 74 has a cross groove 10, and the cross groove 10 is slidably connected with a cross rod 78. The outer sleeve of the third mounting shaft 74 is provided with The sliding column 75 has a cross block 79 fixedly mounted on its inner wall, and the cross block 79 and the cross rod 78 are fixedly mounted therebetween. A shift fork 76 is fixedly mounted on the outer wall of the third mounting shaft 74. Here, the transport assembly 6 operates synchronously, the conveyor belt 62 starts transporting, the first mounting shaft 63 rotates to drive the first driving wheel 71, and the third mounting shaft 74 rotates through the first belt 72 and the first driven wheel 73. The sliding column 75 is connected to the third mounting shaft 74 through the cross rod 78 and the cross block 79, and rotates accordingly. The shift fork 76 outside the sliding column flips the green onions upwards, separates the stacked green onions and causes most of the soil to fall off.
[0026] In this embodiment, it should be noted that there are three forks 76, which are located between the two limit baffles 3, and are made of rubber. By using rubber forks 76, unnecessary damage to the green onions can be avoided, which affects the quality of the green onions.
[0027] In this embodiment, if Figure 5 As shown, the flipping assembly 7 also includes an auxiliary column 77 and a connecting spring 710. The end of the auxiliary column 77 is fixedly installed on the surface of the first mounting plate 4, and the end of the auxiliary column 77 away from the first mounting plate 4 is in contact with the end of the sliding column 75, and the end surfaces of the auxiliary column 77 and the sliding column 75 that contact each other are both inclined. The connecting spring 710 is set in the cross-shaped groove 10, and one end of the connecting spring 710 is fixedly installed on the end of the cross-shaped rod 78, and the end of the connecting spring 710 away from the cross-shaped rod 78 is fixedly installed on the inner wall of the cross-shaped groove 10. Here, by setting the auxiliary column 77 to contact the inclined surface of the sliding column 75, under the action of the connecting spring 710, the sliding column 77 reciprocates, causing the shift fork 76 to swing, thereby enhancing the soil cleaning effect.
[0028] In this embodiment, if Figure 6 As shown, the turning assembly 7 is connected to a distribution and conveying assembly 8 for distributing and conveying the green onions one by one.
[0029] Specifically, the distribution conveying assembly 8 includes a second driving wheel 81 and a second driven wheel 83. The second driving wheel 81 is fixedly mounted on the outer wall of the third mounting shaft 74. The second driving wheel 81 and the second driven wheel 83 are connected by a second belt 82. The inner wall fixed sleeve of the second driven wheel 83 is provided with a fourth mounting shaft 84. The end of the fourth mounting shaft 84 is rotatably set with the second mounting plate 9 through a bearing. The second mounting plate 9 is fixedly mounted on the top surface of the T-shaped mounting plate 2. The outer wall fixed sleeve of the fourth mounting shaft 84 is provided with a first gear 85. The first gear 85 is vertically meshed with a second gear 86. The inner wall fixed sleeve of the second gear 86 is provided with a connecting shaft 87. The top end of the connecting shaft 96 is rotatably set with the lower surface of the L-shaped mounting plate 5 through a bearing. The end of the L-shaped mounting plate 5 is fixed to the top surface of the T-shaped mounting plate 2. The top surface of the T-shaped mounting plate 2 is fixedly installed, and a shifting plate 88 is fixedly installed on the bottom end of the connecting shaft 87. The bottom surface of the shifting plate 88 is in contact with the surface of the conveyor belt 62. Two symmetrically arranged limiting conveying plates 89 are provided on the right side of the shifting plate 88. The limiting conveying plate 89 is fixedly installed with the inner surface of the limiting baffle 89, and the bottom surfaces of the two limiting conveying plates 89 are in contact with the surface of the conveyor belt 62. Here, after the green onions are pushed aside, they enter the distribution transport component 8, and the third mounting shaft 74 rotates through the second driving wheel 81, the second belt 82 and the second driven wheel 83 to drive the fourth mounting shaft 84, and the connecting shaft 87 drives the shifting plate 88 to rotate through the first gear 85 and the second gear 86, partially pushing the green onions apart, and then transporting them one by one through the two limiting transport plates 89.
[0030] When the conveying mechanism of the harvester of the present technical solution is used, the entire transport assembly 6 will work together under the operation of the harvester. At this time, the conveyor belt 62 is in the transport working state. Here, the first driving wheel 71 can be rotated under the rotation of the first mounting shaft 63. Due to the provision of the first belt 72 and the first driven wheel 73, the third mounting shaft 74 can have a rotation tendency at this time. Since the sliding post 75 is sleeved on the outside of the third mounting shaft 74, and the sliding post 75 and the third mounting shaft 74 are connected by a cross-shaped rod 78 and a cross-shaped block 79, the sliding post 75 can be driven to rotate under the rotation of the third mounting shaft 74, and then the fork 76 installed on the outer surface of the sliding post 75 can be rotated, so that the fork 76 can flip the green onions upward. Here, due to the flipping, not only can the green onions piled together be separated, but also most of the soil on the surface of the green onions can be effectively dropped, which can reduce the subsequent processing work. Here, due to The auxiliary column 77 is set, especially the end surface of the auxiliary column 77 and the sliding column 75 contacting each other is set as an inclined surface, so at this time, the sliding column 77 can have a moving tendency. At this time, the reciprocating motion of the sliding column 77 can be realized under the action of the connecting spring 710. The reciprocating motion of the sliding column 77 can make the shift fork 76 have a swinging treatment on the green onion, thereby strengthening the soil treatment force on the surface of the green onion. When the green onion is spread apart, it will pass through the distribution transportation component 8. Due to the set second driving wheel 81, the second belt 82, and the set second driven wheel 83, the fourth mounting shaft 84 can be rotated under the rotation of the third mounting shaft 74. The rotation of the fourth mounting shaft 84 can make the first gear 85 rotate, and the rotation of the first gear 85 can make the second gear 86 rotate. Under the rotation of the second gear 86, the connecting shaft 87 can drive the shifting plate 88 to rotate. Under the rotation of the shifting plate 88, the green onions can be partially spread apart and transported separately, and then passed between the two limiting transport plates 89, the work of transporting them one by one can be realized.
[0031] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.
Claims
1. A conveying mechanism for a green onion harvester, comprising a mounting frame (1), and a T-shaped mounting plate (2) fixedly mounted on the top surface of the mounting frame (1), characterized in that: The number of the mounting frames (1) and the number of the T-shaped mounting plates (2) are both two. The two mounting frames (1) and the T-shaped mounting plates (2) are symmetrically arranged in front and back positions. A transport component (6) is fixedly installed between the two mounting frames (1). The transport component (6) is connected to a turning component (7) for turning over the harvested green onions to avoid piling up and also for removing dirt from the green onions. The turning component (7) is connected to a distribution and transportation component (8) for distributing and transporting the green onions one by one.
2. The conveying mechanism of the green onion harvester according to claim 1, characterized in that: The transport assembly (6) comprises an active roller (61) and a driven roller (64), wherein the active roller (61) and the driven roller (64) are both arranged at a middle position between two mounting frames (1), the inner wall fixed sleeve of the active roller (61) is provided with a first mounting shaft (63), and the two ends of the first mounting shaft (63) are rotatably arranged with the inner surface of the mounting frame (1) through bearings, the active roller (61) and the driven roller (64) are connected by a conveying belt (62), the inner wall fixed sleeve of the driven roller (64) is provided with a second mounting shaft (65), and the two ends of the second mounting shaft (65) are rotatably arranged with the inner surface of the mounting frame (1) through bearings.
3. The conveying mechanism of the green onion harvester according to claim 2, characterized in that: A tensioning wheel (66) is provided below the conveyor belt (62).
4. The conveying mechanism of the green onion harvester according to claim 2, characterized in that: A limit baffle (3) is provided above the rear end of the conveyor belt (62), and the surface of the limit baffle (3) is fixedly mounted to the end of the T-shaped mounting plate (2). There are two limit baffles (3), and the two limit baffles (3) are symmetrically distributed at front and rear positions with the center line of the front of the conveyor belt (62) as the symmetry axis.
5. The conveying mechanism of the green onion harvester according to claim 1, characterized in that: The flip assembly (7) includes a first driving wheel (71) and a first driven wheel (73), wherein the first driving wheel (71) is fixedly sleeved on the outer wall of the first mounting shaft (63), the first driving wheel (71) and the first driven wheel (73) are connected to each other through a first belt (72), the inner wall of the first driven wheel (73) is sleeved with a third mounting shaft (74), the end of the third mounting shaft (74) is rotatably arranged with the first mounting plate (4) through a bearing, and the first mounting plate (4) is fixedly mounted. Mounted on the top surface of the T-shaped mounting plate (2), the end surface of the third mounting shaft (74) is provided with a cross-shaped groove (10), and the cross-shaped groove (10) is provided with a cross-shaped rod (78) in a sliding manner. The outer sleeve of the third mounting shaft (74) is provided with a sliding column (75), and the inner wall of the sliding column (75) is fixedly installed with a cross-shaped block (79). The cross-shaped block (79) and the cross-shaped rod (78) are fixedly installed. The outer wall of the third mounting shaft (74) is fixedly installed with a shift fork (76).
6. The conveying mechanism of the green onion harvester according to claim 5, characterized in that: The number of the shift forks (76) is three, the three shift forks (76) are located between the two limit baffles (3), and the three shift forks (76) are made of rubber material.
7. The conveying mechanism of the green onion harvester according to claim 5, characterized in that: The flip assembly (7) further comprises an auxiliary column (77) and a connecting spring (710), wherein the end of the auxiliary column (77) is fixedly mounted on the surface of the first mounting plate (4), and the end of the auxiliary column (77) away from the first mounting plate (4) is in contact with the end of the sliding column (75), and the end surfaces of the auxiliary column (77) and the sliding column (75) in contact with each other are both inclined surfaces, and the connecting spring (710) is arranged in the cross-shaped groove (10), and one end of the connecting spring (710) is fixedly mounted on the end of the cross-shaped rod (78), and the end of the connecting spring (710) away from the cross-shaped rod (78) is fixedly mounted on the inner wall of the cross-shaped groove (10).
8. The conveying mechanism of the green onion harvester according to claim 1, characterized in that: The distribution conveying assembly (8) includes a second driving wheel (81) and a second driven wheel (83), wherein the second driving wheel (81) is fixedly mounted on the outer wall of the third mounting shaft (74), the second driving wheel (81) and the second driven wheel (83) are connected to each other through a second belt (82), the inner wall of the second driven wheel (83) is fixedly sleeved with a fourth mounting shaft (84), the end of the fourth mounting shaft (84) is rotatably arranged with the second mounting plate (9) through a bearing, the second mounting plate (9) is fixedly mounted on the top surface of the T-shaped mounting plate (2), and the fourth mounting shaft (84) is fixedly sleeved with the inner wall of the second driven wheel (83), and the end of the fourth mounting shaft (84) is rotatably arranged with the second mounting plate (9) through a bearing, and the second mounting plate (9) is fixedly mounted on the top surface of the T-shaped mounting plate (2). The outer wall fixed sleeve of the mounting shaft (84) is provided with a first gear (85), the first gear (85) is vertically meshed with a second gear (86), the inner wall fixed sleeve of the second gear (86) is provided with a connecting shaft (87), the top end of the connecting shaft (96) is rotatably arranged with the lower surface of the L-shaped mounting plate (5) through a bearing, the end of the L-shaped mounting plate (5) is fixedly installed with the top surface of the T-shaped mounting plate (2), and the bottom end of the connecting shaft (87) is fixedly installed with a shifting plate (88), and the bottom surface of the shifting plate (88) is arranged in contact with the surface of the conveyor belt (62).
9. The conveying mechanism of the green onion harvester according to claim 8, characterized in that: Two symmetrically arranged limit conveying plates (89) are provided on the right side of the shifting plate (88), the limit conveying plates (89) are fixedly mounted on the inner surface of the limit baffle (89), and the bottom surfaces of the two limit conveying plates (89) are both in contact with the surface of the conveying belt (62).