Color selection system assembly and tomato harvester

Abstract

The application discloses a color selection system assembly and a tomato harvester, which comprises color selection front conveying devices, a first color selection device, a second color selection device and unloading front conveying devices arranged in sequence, and further comprises a suspension leveling device for synchronously adjusting the positions of the first color selection device and the second color selection device and keeping the positions horizontal. The color selection front conveying device comprises a color selection front conveying frame arranged on a rack, a first supporting wheel arranged on the color selection front conveying frame, a color selection front conveying chain, a color selection front driving mechanism and a cleaning mechanism. The color selection front conveying chain comprises a conveying section and a return section. The conveying section comprises a horizontal section and an inclined section arranged at an angle with the horizontal section. An adjusting wheel is arranged on the color selection front conveying frame to adjust the conveying angle and the material throwing angle of the inclined section. The application has the advantages of simple structure, high fruit sorting efficiency in an environment with a large amount of mud and water, stable performance, high sorting precision and efficiency, small tomato damage, strong adaptability and applicability to fruit conveying of other berries.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular, to a color sorting system assembly. Furthermore, this invention also relates to a tomato harvester including the aforementioned color sorting system assembly. Background Technology

[0002] As the cost of manual tomato harvesting in China increases, mechanized harvesting has become an inevitable trend. Tomato harvesting machines, as the most important piece of equipment in mechanized tomato harvesting, play an increasingly vital role. During mechanized tomato harvesting, the harvested tomatoes contain a large amount of unripe fruit and soil clods, requiring sorting to meet the purchasing standards of tomato paste factories. Tomatoes harvested by the tomato machine are transported via a transverse conveyor to the fruit sorting side. The fruit sorting side primarily selects unripe tomatoes and removes impurities. Fruit sorting is mainly completed by a color sorting device. Based on the working characteristics of the color sorting device, the entire sorting platform must be kept level during operation to maximize the device's effectiveness and ensure that the sorted tomatoes meet the expected standards.

[0003] Existing tomato harvesters use color sorting devices that are suspended and supported by multiple hydraulic cylinders adjusting multiple degrees of freedom. This method requires a large installation space, and the structure and control program of the multi-cylinder suspension adjustment method are relatively complex and costly. In addition, the working environment of tomato harvesters is complex and harsh. During harvesting, the juice from the broken tomatoes mixes with the soil, causing the soil to adhere to the conveyor belt, increasing the weight of the conveyor belt and causing it to slip, which seriously affects the transportation of tomatoes. Furthermore, it is difficult to achieve uniform distribution of tomatoes on a horizontally arranged conveyor belt. Stacked tomatoes entering the color sorter at the same time will reduce the sorting accuracy of the color sorter. Summary of the Invention

[0004] This invention provides a color sorting system assembly and a tomato harvester to solve the technical problems of existing color sorting devices, such as the need for large installation space for the leveling device, complex control program, and high cost; and the easy accumulation of material on the conveyor belt of the color sorting device, resulting in poor sorting effect and low accuracy.

[0005] According to one aspect of the present invention, a color sorting system assembly is provided, comprising a color sorting pre-conveyor device, a primary color sorting device, a secondary color sorting device, and a discharge pre-conveyor device arranged sequentially, and further comprising a suspension leveling device for synchronously adjusting the positions of the primary color sorting device and the secondary color sorting device and keeping them horizontal. The color sorting pre-conveyor device includes a color sorting pre-conveyor frame arranged on a frame, a first support roller arranged on the color sorting pre-conveyor frame, a color sorting pre-conveyor chain supported by the first support roller, a color sorting pre-conveyor drive mechanism for driving the color sorting pre-conveyor chain, and a cleaning mechanism for cleaning the color sorting pre-conveyor chain. The color sorting pre-conveyor chain includes a conveying section and a return section. The cleaning mechanism is arranged on the return section. The conveying section includes a horizontal section and an inclined section arranged at an angle to the horizontal section. The color sorting pre-conveyor frame is provided with a movable adjusting wheel that is positioned after movement. The adjusting wheel is rolledly connected to the middle of the inclined section to adjust the conveying angle and discharge angle of the inclined section.

[0006] Furthermore, the color sorting pre-drive mechanism includes a color sorting pre-drive shaft assembly, a color sorting pre-chain drive assembly, and a color sorting pre-motor arranged on the color sorting pre-conveyor frame. The color sorting pre-motor drives the color sorting pre-drive shaft assembly to rotate through the color sorting pre-chain drive assembly. The color sorting pre-drive shaft assembly drives the color sorting pre-conveyor chain to rotate. The color sorting pre-motor is mounted on the inner side of the color sorting pre-conveyor frame. The color sorting pre-drive shaft assembly includes a color sorting pre-drive shaft rotatably connected to the color sorting pre-conveyor frame, an expansion sleeve sleeved on the color sorting pre-drive shaft, and a conveyor sprocket sleeved on the expansion sleeve and meshing with the color sorting pre-conveyor chain. The expansion sleeve includes a conical sleeve sleeved on the color sorting pre-drive shaft, a tensioning sleeve for connecting the conveyor sprocket, and a screw for connecting the conical sleeve and the tensioning sleeve. The inner hole of the tensioning sleeve is an inner cone shape adapted to the conical sleeve. Both the conical sleeve and the tensioning sleeve have notches.

[0007] Furthermore, the cleaning mechanism includes a cleaning mounting frame, a cleaning sprocket, a cleaning rod, a bearing, and a spring. The two cleaning sprockets are coaxially arranged and rotatably connected to the corresponding cleaning mounting frames through the bearings. The two ends of the cleaning rod are respectively connected to the corresponding teeth of the two cleaning sprockets. The cleaning sprockets mesh with the color sorting pre-conveyor chain. The middle part of the cleaning mounting frame is hinged to the color sorting pre-conveyor frame. The first end of the spring is connected to the end of the cleaning mounting frame away from the bearing, and the second end of the spring is connected to the color sorting pre-conveyor frame.

[0008] Furthermore, the suspension leveling device includes a first suspension support beam, a suspension shaft welded together, a second suspension support beam, a first bearing with a seat, a first tie rod, a second tie rod, a first connecting beam, a second connecting beam, and a telescopic mechanism. The first suspension support beam and the second suspension support beam are spaced apart on the frame. The two ends of the suspension shaft welded together are rotatably connected to the first suspension support beam and the second suspension support beam respectively through the first bearing with a seat. One end of the telescopic mechanism is hinged to the first suspension support beam, and the other end is hinged to the first connecting beam. The first connecting beam and the second connecting beam are arranged parallel to each other. The two ends of the first tie rod are welded and hinged to the first connecting beam and the suspension shaft respectively. The two ends of the second tie rod are welded and hinged to the second connecting beam and the suspension shaft respectively. The telescopic mechanism extends and retracts synchronously, driving the first connecting beam and the second connecting beam to adjust their height.

[0009] Furthermore, one end of the primary color sorting device is hinged to the frame, and the other end is connected to the second connecting beam. One end of the secondary color sorting device is hinged to the frame, and the other end is connected to the first connecting beam. The axial length of the second tie rod is less than the axial length of the first tie rod. A level and a controller for receiving the angle signal detected by the level are installed on the primary or secondary color sorting device. The controller is electrically connected to the telescopic mechanism.

[0010] Furthermore, the primary color sorting device includes a color sorting frame, a color sorting belt for carrying and conveying the material flow, a color sorting drive mechanism for driving the color sorting belt, a color sorting photoelectric mechanism for color recognition of the material flow, and a color sorting finger mechanism for sorting the material. The color sorting belt, the color sorting drive mechanism, and the color sorting photoelectric mechanism are all arranged on the color sorting frame, and the color sorting finger mechanism is arranged below the color sorting photoelectric mechanism. The end of the color sorting frame near the color sorting finger mechanism is connected to the suspension leveling device, and the end away from the color sorting finger mechanism is hinged to the frame. The secondary color sorting device has the same structure as the primary color sorting device.

[0011] Furthermore, the color sorting drive mechanism includes an active roller, a second bearing seat, and a color sorting motor. The output shaft of the color sorting motor is connected to the active roller. A second sliding groove is provided on the color sorting frame. The second bearing seat can move along the second sliding groove and be positioned after moving. The active roller is rotatably connected to the second bearing seat.

[0012] Furthermore, the color sorting snap-tap mechanism includes a snap-tap mounting frame for connecting the color sorting photoelectric mechanism, a snap-tap mounting block arranged on the snap-tap mounting frame, a snap-tap hinged to the snap-tap mounting block, and a cylinder for driving the snap-tap.

[0013] Furthermore, the pre-unloading conveying device includes a pre-unloading conveying frame mounted on the frame, a second support roller mounted on the pre-unloading conveying frame, a pre-unloading conveying chain supported by the second support roller, and a pre-unloading drive mechanism for driving the pre-unloading conveying chain.

[0014] According to another aspect of the present invention, a tomato harvester is also provided, which includes the color sorting system assembly described above.

[0015] The present invention has the following beneficial effects:

[0016] The color sorting system assembly of this invention includes a pre-sorting conveyor that carries and transports the tomato material flow backwards; a primary color sorting device receives the tomatoes for the first sorting; and a secondary color sorting device receives the tomatoes after the first sorting and performs a second sorting to remove unripe tomatoes and ensure sorting accuracy. A drive mechanism drives the pre-sorting conveyor chain to transport the tomatoes to the color sorter for throwing. A first roller on the pre-sorting conveyor frame divides the conveying section of the pre-sorting conveyor chain into a horizontal section and an inclined section at an angle to the horizontal section. An adjusting wheel is positioned in the middle of the inclined section, dividing it into a rolling section and a throwing section with different inclination angles, with the adjusting wheel as the dividing point. By adjusting the positions of the two adjusting wheels on the pre-sorting conveyor frame, the conveying angle of the rolling section and the throwing angle of the throwing section can be changed, allowing the tomatoes to move more freely during transport. The tomatoes are evenly distributed along the conveyor chain while rolling, preventing them from piling up on one side and entering the color sorter simultaneously, thus improving the sorting accuracy of the color sorter. The cleaning mechanism removes dirt adhering to the conveyor chain before color sorting, preventing both increased weight on the conveyor chain and slippage, thereby improving conveying efficiency. The cleaning mechanism is located on the return section to prevent dirt from being fed into subsequent color sorting stations along with the tomatoes. The suspension leveling device can simultaneously adjust the angle between the primary and secondary color sorting devices and the horizontal plane, keeping the primary and secondary color sorting devices horizontal and enabling the color sorting devices to achieve optimal operating conditions. The color sorting system of this invention has a simple overall structure, can improve fruit sorting efficiency in environments with high mud and water content, has stable performance, high sorting accuracy and efficiency, minimal tomato damage, and strong adaptability, and can also be used for fruit conveying of other berries.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a color sorting system assembly according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a front view of the color sorting system assembly according to a preferred embodiment of the present invention;

[0021] Figure 3 This is a front view of the color sorting pre-conveying device according to a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the color sorting pre-conveying device according to a preferred embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the color sorting pre-conveying chain according to a preferred embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the color sorting front drive shaft according to a preferred embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the expansion sleeve according to a preferred embodiment of the present invention;

[0026] Figure 8 This is a cross-sectional view of the expansion sleeve according to a preferred embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the cleaning mechanism according to a preferred embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of a primary color sorting device according to a preferred embodiment of the present invention;

[0029] Figure 11 This is a front view of a primary color sorting device according to a preferred embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the color sorting finger-flicking mechanism according to a preferred embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the color sorting finger-flicking mechanism according to a preferred embodiment of the present invention;

[0032] Figure 14 This is a schematic diagram of the structure of the finger snapping mechanism according to a preferred embodiment of the present invention;

[0033] Figure 15 This is a schematic diagram of the structure of the suspension leveling device according to a preferred embodiment of the present invention;

[0034] Figure 16 This is a schematic diagram of the telescopic mechanism according to a preferred embodiment of the present invention;

[0035] Figure 17This is a schematic diagram of the suspension shaft welding structure according to a preferred embodiment of the present invention;

[0036] Figure 18 This is a schematic diagram of the structure of the first pull rod according to a preferred embodiment of the present invention;

[0037] Figure 19 This is a schematic diagram of the structure of the pre-unloading conveying device according to a preferred embodiment of the present invention;

[0038] Figure 20 This is a schematic diagram of the structure of the conveyor chain before unloading in a preferred embodiment of the present invention.

[0039] Legend:

[0040] 100. Frame; 1. Color sorting pre-conveyor device; 11. Color sorting pre-conveyor frame; 111. Adjusting wheel; 112. Baffle; 12. Color sorting pre-conveyor chain; 121. Belt; 122. Connecting rod; 1201. Conveyor section; 12011. Horizontal section; 12012. Inclined section; 1202. Return section; 13. Drive shaft assembly; 131. Color sorting pre-conveyor drive shaft; 132. Conveyor sprocket; 133. Expansion sleeve; 1331. Conical sleeve; 1332. Tensioning sleeve; 1333. Screw; 14. First driven component 15. First support roller; 16. Cleaning mechanism; 161. Cleaning mounting frame; 162. Cleaning sprocket; 163. Spring; 164. Cleaning rod; 165. Bearing; 17. Chain drive assembly; 171. Drive sprocket; 172. Drive sprocket; 173. Tensioning mechanism; 1731. Tensioning seat; 1732. Tensioning wheel; 1733. First chute; 174. Chain; 18. Color sorting front motor; 2. First-stage color sorting device; 21. Color sorting frame; 211. Second chute; 22. Color sorting belt; 23. 25. Drive roller; 26. Second bearing with seat; 27. Color sorting mounting frame; 28. Color sorting motor; 29. ​​Color sorting photoelectric mechanism; 20. Color sorting finger mechanism; 20. Finger mounting frame; 21. Finger mounting block; 22. Cylinder; 23. Finger; 24. Secondary color sorting device; 5. Suspension leveling device; 6. First suspension support beam; 7. Suspension shaft welding; 8. Suspension shaft; 9. Cantilever; 10. Third hinge shaft; 11. Second suspension support beam; 12. First bearing with seat; 13. First tie rod 451. Tie rod shaft; 452. Spherical bearing; 46. First connecting beam; 461. First hinge seat; 462. First hinge shaft; 47. Telescopic mechanism; 48. Second connecting beam; 481. Second hinge seat; 482. Second hinge shaft; 49. Second tie rod; 5. Pre-unloading conveying device; 51. Pre-unloading conveying frame; 52. Pre-unloading conveying chain; 53. Pre-unloading drive shaft assembly; 54. Second support roller; 55. Second driven roller; 56. Pre-unloading chain drive assembly; 57. Motor; 6. Level. Detailed Implementation

[0041] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0042] Please refer to the following: Figures 1 to 20 The color sorting system assembly of this embodiment includes a color sorting pre-conveying device 1, a primary color sorting device 2, a secondary color sorting device 3, and a discharge pre-conveying device 5 arranged sequentially. It also includes a suspension leveling device 4 for synchronously adjusting the positions of the primary color sorting device 2 and the secondary color sorting device 3 and keeping them horizontal. The color sorting pre-conveying device 1 includes a color sorting pre-conveying frame 11 arranged on the frame, a first support roller 15 arranged on the color sorting pre-conveying frame 11, a color sorting pre-conveying chain 12 supported by the first support roller 15, and a color sorting pre-drive motor for driving the color sorting pre-conveying chain 12. The invention relates to a cleaning mechanism 16 for cleaning the pre-sorting conveyor chain 12. The pre-sorting conveyor chain 12 includes a conveying section 1201 and a return section 1202. The cleaning mechanism 16 is arranged on the return section 1202. The conveying section 1201 includes a horizontal section 12011 and an inclined section 12012 arranged at an angle to the horizontal section 12011. The pre-sorting conveyor frame 11 is provided with a movable adjusting wheel 111 that is positioned after movement. The adjusting wheel 111 is rolledly connected to the middle of the inclined section 12012 to adjust the conveying angle and the throwing angle of the inclined section 12012.

[0043] In this embodiment, the color sorting system assembly includes a pre-sorting conveyor 1 that carries and transports the tomato material flow backwards; a primary color sorting device 2 that receives the tomato fruits for the first sorting; and a secondary color sorting device 3 that receives the tomatoes after the first sorting and performs a second sorting to remove unripe tomatoes and ensure sorting accuracy. A drive mechanism drives the pre-sorting conveyor chain 12 to transport the tomato fruits to the color sorter for unloading. The first support roller 15 on the pre-sorting conveyor frame 11 holds the pre-sorting conveyor chain 12 in place. The conveying section 1201 of section 2 (the part used to carry and transport tomato fruits) is divided into a horizontal section 12011 and an inclined section 12012 arranged at an angle to the horizontal section 12011. An adjusting wheel 111 is set in the middle of the inclined section 12012, so that the inclined section 12012 is divided into two sections with different inclination angles: a rolling section (connected to the horizontal section 12011) and a throwing section, with the adjusting wheel 111 as the dividing point. By adjusting the position of the two adjusting wheels 111 on the color sorting front conveying frame 11, the position of the tomato fruits can be changed. The conveying angle of the rolling section and the throwing angle of the throwing section ensure that the tomato fruits roll and are evenly distributed on the conveyor chain during the conveying process. This prevents the tomatoes from piling up on one side and entering the color sorter simultaneously, thus improving the sorting accuracy of the color sorter. The cleaning mechanism 16 removes the soil attached to the conveyor chain 12 before color sorting, which not only prevents the weight of the conveyor chain 12 before color sorting from increasing but also prevents the conveyor chain 12 from slipping, thereby improving conveying efficiency. The cleaning mechanism 16 is located on the return section 1202 to prevent soil from being fed into the subsequent color sorting station along with the tomatoes. The suspension leveling device 4 can simultaneously adjust the angle between the primary color sorter 2 and the secondary color sorter 3 and the horizontal plane, keeping the primary color sorter 2 and the secondary color sorter 3 horizontal, enabling the color sorting devices to achieve optimal operating conditions. The color sorting system assembly of this embodiment has a simple structure, can improve the fruit sorting efficiency in environments with large amounts of mud and water, has stable performance, high sorting accuracy and efficiency, minimal tomato damage, and strong adaptability. It can also be used for the fruit conveying of other berries. Optionally, the color sorting pre-conveyor frame 11 is provided with strip-shaped holes, and the adjusting wheel 111 can slide along the strip-shaped holes and be positioned after sliding, thereby adjusting the conveying angle and throwing angle of the inclined section 12012. Optionally, the color sorting pre-conveyor frame 11 is provided with multiple mounting holes for installing the adjusting wheel 111. By selecting different mounting holes to install the adjusting wheel 111, the conveying angle and throwing angle of the inclined section 12012 can be adjusted. Optionally, the color sorting pre-conveyor chain 12 includes a belt 121 and connecting rods 122 arranged perpendicular to the belt 121. The two ends of the connecting rods 122 are respectively installed on two belts 121 arranged at intervals. Multiple connecting rods 122 are arranged at equal intervals, playing a preliminary screening function during the tomato conveying process, which can screen out smaller tomatoes and small clods of soil from the tomato material.Optionally, a baffle 112 is provided on the color sorting pre-conveying frame 11 to prevent the fruit from falling. The baffle 112 is located above the end of the horizontal section 12011 away from the inclined section 12012 to prevent the tomato fruit from falling off the horizontal section 12011 and to avoid waste.

[0044] In this embodiment, the pre-sorting drive mechanism includes a pre-sorting drive shaft assembly 13, a pre-sorting chain drive assembly 17, and a pre-sorting motor 18 arranged on the pre-sorting conveyor frame 11. The pre-sorting motor 18 drives the pre-sorting drive shaft assembly 13 to rotate through the pre-sorting chain drive assembly 17. The pre-sorting drive shaft assembly 13 drives the pre-sorting conveyor chain 12 to run. The pre-sorting motor 18 is installed on the inner side of the pre-sorting conveyor frame 11, which can reduce the overall width of the pre-sorting conveyor device 1, making the structure more compact and avoiding interference between the pre-sorting motor 18 and other parts of the tomato harvester.Optionally, the drive shaft assembly 13 is located at one end of the inclined section 12012 away from the horizontal section 12011, and a first driven wheel 14 is located at one end of the horizontal section 12011 away from the inclined section 12012 to improve the stability of the pre-sorting conveyor chain 12. The pre-sorting drive shaft assembly 13 includes a pre-sorting drive shaft 131 rotatably connected to the pre-sorting conveyor frame 11, a tension sleeve 133 sleeved on the pre-sorting drive shaft 131, and a conveyor sprocket 132 sleeved on the tension sleeve 133 and meshing with the pre-sorting conveyor chain 12. The tension sleeve 133 can adjust the axial position of the conveyor sprocket 132 on the pre-sorting drive shaft 131, so that the pre-sorting drive shaft 131... The conveyor sprockets 132 at both ends of the color sorting machine can abut against the belts 121 on the corresponding sides to prevent the conveyor chain 12 before color sorting from moving axially. The tensioning sleeve 133 includes a tapered sleeve 1331 fitted on the drive shaft 131 before color sorting, a tensioning sleeve 1332 for connecting the conveyor sprockets 132, and a screw 1333 for connecting the tapered sleeve 1331 and the tensioning sleeve 1332. The inner hole of the tensioning sleeve 1332 is an inner cone shape that fits the tapered sleeve 1331. Both the tapered sleeve 1331 and the tensioning sleeve 1332 have notches. The outer surface of the tapered sleeve 1331 is a tapered surface, and the inner hole of the tensioning sleeve 1332 is a tapered hole. The tapered sleeve 1331 is fitted onto the drive shaft 131 before color sorting. 1. Next, the inner hole of the tensioning sleeve 1332 is fitted onto the outer circumference of the tapered sleeve 1331. Then, the conveyor sprocket 132 is fitted onto the tensioning sleeve 1332. By tightening the screws 1333, the tapered sleeve 1331 and the tensioning sleeve 1332 are pulled together tightly, increasing the contact area between the inner hole of the tensioning sleeve 1332 and the outer circumference of the tapered sleeve 1331. Since both the tapered sleeve 1331 and the tensioning sleeve 1332 have notches, the outer diameter of the tensioning sleeve 1332 is increased, resulting in a tight connection between the outer circumference of the tensioning sleeve 1332 and the inner hole of the conveyor sprocket 132. At the same time, the inner diameter of the tapered sleeve 1331 is reduced, making the inner hole of the tapered sleeve 1331 and the inner hole of the conveyor sprocket 132 more closely connected. The outer walls of the drive shaft 131 are tightly connected, thereby achieving axial positioning of the conveyor sprocket 132 on the drive shaft 131 before color sorting. When it is necessary to adjust the axial position of the conveyor sprocket 132, the screw 1333 is loosened, the outer diameter of the tension sleeve 1332 decreases, and the inner diameter of the tapered sleeve 1331 increases, thereby adjusting the axial position of the conveyor sprocket 132 on the drive shaft 131 before color sorting. The conveyor sprockets 132 on both sides can not only drive the conveyor chain 12 before color sorting to rotate, but also axially position the conveyor chain 12 before color sorting to prevent axial movement. Moreover, the requirements for the straightness, roundness, and surface finish of the drive shaft 131 before color sorting are not high, the processing is convenient, and the cost can be saved.

[0045] The color sorting front chain drive assembly 17 includes a drive sprocket 172 mounted on the output shaft of the color sorting front motor 18, a drive sprocket 171 mounted on the color sorting front drive shaft 131, a chain 174 connecting the drive sprocket 172 and the drive sprocket 171, and a tensioning mechanism 173 for tensioning the chain 174. The tensioning mechanism 173 includes a tensioning seat 1731 mounted on the color sorting front conveyor frame 11 and a tensioning wheel 1732 meshing with the chain 174. The tensioning seat 1731 has a first groove 1733 for mounting the tensioning wheel 1732. The tensioning wheel 1732 can slide along the first groove 1733 and be positioned after sliding. By adjusting the position of the tensioning wheel 1732 in the first groove 1733, the chain 174 can be tensioned / relaxed. The structure is simple and easy to disassemble and maintain.

[0046] In this embodiment, the cleaning mechanism 16 includes a cleaning mounting frame 161, a cleaning sprocket 162, a cleaning rod 164, a bearing 165, and a spring 163. Two cleaning sprockets 162 are coaxially arranged and rotatably connected to their respective cleaning mounting frames 161 via bearings 165. Both ends of the cleaning rod 164 are connected to the corresponding teeth of the two cleaning sprockets 162. The cleaning sprockets 162 mesh with the pre-sorting conveyor chain 12. The middle part of the cleaning mounting frame 161 is hinged to the pre-sorting conveyor frame 11. The first end of the spring 163 is connected to the end of the cleaning mounting frame 161 away from the bearing 165, and the second end of the spring 163 is connected to the pre-sorting conveyor frame 11. The spring 163 can counteract the pressure of the pre-sorting conveyor chain 12 on the cleaning sprockets 162, thus tensioning the pre-sorting conveyor chain 12 and preventing the cleaning sprockets 162 from jumping. The cleaning rods 164 and 162 are connected by corresponding teeth. This spacing prevents dirt from clogging the small gaps between the cleaning rods 164, ensuring they can reach into the gaps between the connecting rods 122 and effectively clean the pre-sorting conveyor chain 12. Furthermore, the number of teeth on the cleaning sprocket 162 matches the total number of gaps in the connecting rods 122, ensuring that each gap between the connecting rods 122 is cleaned by the cleaning rods 164 during transport, removing dirt and debris. This avoids increasing the weight of the pre-sorting conveyor chain 12 and prevents skipped teeth, thus ensuring transport efficiency. The cleaning mechanism 16 is a passive cleaning system, powered by the rotation of the pre-sorting conveyor chain 12. No additional power is required as the chain rotates, demonstrating its ingenious structure.

[0047] In this embodiment, the suspension leveling device 4 includes a first suspension support beam 41, a suspension shaft weld 42, a second suspension support beam 43, a first bearing with a seat 44, a first tie rod 45, a second tie rod 49, a first connecting beam 46, a second connecting beam 48, and a telescopic mechanism 47. The first suspension support beam 41 and the second suspension support beam 43 are spaced apart on the frame. The two ends of the suspension shaft weld 42 are rotatably connected to the first suspension support beam 41 and the second suspension support beam 43 respectively through the first bearing with a seat 44. One end of the mechanism 47 is hinged to the first suspension support beam 41, and the other end is hinged to the first connecting beam 46. The first connecting beam 46 and the second connecting beam 48 are arranged in parallel. The two ends of the first tie rod 45 are respectively hinged to the first connecting beam 46 and the suspension shaft welded together 42. The two ends of the second tie rod 49 are respectively hinged to the second connecting beam 48 and the suspension shaft welded together 42. The telescopic mechanism 47 extends and retracts synchronously, driving the first connecting beam 46 and the second connecting beam 48 to adjust their height. The first end of the first suspension support beam 41 is connected to the frame 10. The first connecting beam 46 is hinged to the second end of the telescopic mechanism 47, and the telescopic end of the telescopic mechanism 47 is hinged to the first connecting beam 46. The second suspension support beam 43 is connected to the frame 100. The first suspension support beam 41 and the second suspension support beam 43 are evenly provided with first seated bearings 44. The two ends of the suspension shaft weld 42 are rotatably connected to the first suspension support beam 41 and the second suspension support beam 43 respectively through the first seated bearings 44. The telescopic mechanism 47 drives the first connecting beam 46 to adjust its height by telescopic movement. At the same time, the first connecting beam 46 drives the suspension shaft weld 42 to rotate through the first tie rod 45, so that the suspension shaft weld 42 drives the second connecting beam 48 to adjust its height synchronously through the second tie rod 49. Its structure is simple, occupies little space, and can complete the adjustment of two connecting beams simultaneously through one telescopic mechanism 47. The control logic is simple, with good applicability and versatility. It is also easy to disassemble and assemble, enabling the color sorting device to achieve optimal operating conditions, reducing the labor intensity of operators, and saving labor and material costs. Optionally, the telescopic mechanism 47 is a hydraulic cylinder, a pneumatic cylinder, or a gear and rack mechanism driven by a motor. Optionally, a first hinge seat 461 is provided at the middle position of the first connecting beam 46, and a first hinge shaft 462 for hinged telescopic mechanism 47 or first tie rod 45 is provided on the first hinge seat 461. The first hinge shaft 462 is arranged parallel to the first connecting beam 46. A second hinge seat 481 is provided at the middle position of the second connecting beam 48, and a second hinge shaft 482 for hinged second tie rod 49 is provided on the second hinge seat 481. The second hinge shaft 482 is arranged parallel to the second connecting beam 48. The first hinge seat 461 is located at the middle position of the first connecting beam 46, and the second hinge seat 481 is located at the middle position of the second connecting beam 48, which can improve the stability of the suspension leveling device 4.Optionally, the suspension shaft welding 42 includes a suspension shaft 421 and cantilever arms 422 spaced apart on the suspension shaft 421. A third hinge shaft 423 for hinged connection of the first tie rod 45 or the second tie rod 49 is mounted on each cantilever arm 422. The third hinge shaft 423 is parallel to the suspension shaft 421. The two cantilever arms 422 are welded to the suspension shaft 421. When the suspension shaft 421 rotates, the two cantilever arms 422 rotate synchronously, thereby enabling height adjustment of the first connecting beam 46 and the second connecting beam 48. This design is simple in structure and reliable in transmission. Optionally, both the first tie rod 45 and the second tie rod 49 include a tie rod shaft 451 and a spherical bearing 452. The two spherical bearings 452 are respectively located at both ends of the tie rod shaft 451, with their axes perpendicular to each other. This allows the suspension shaft 421 to rotate around its axis when the telescopic mechanism 47 extends or retracts, reducing jamming.

[0048] In this embodiment, one end of the primary color sorting device 2 is hinged to the frame 100, and the other end is connected to the second connecting beam 48. One end of the secondary color sorting device 3 is hinged to the frame 100, and the other end is connected to the first connecting beam 46. The axial length of the second tie rod 49 is less than the axial length of the first tie rod 45. A level 6 and a controller for receiving the angle signal detected by the level 6 are installed on the primary color sorting device 2 or the secondary color sorting device 3. The controller is electrically connected to the telescopic mechanism 47. After the level 6 detects the angle change signal between the secondary color sorting device 3 and the horizontal plane, the controller can control the telescopic mechanism 47 to extend and retract, driving the secondary color sorting device 3 to rotate around the hinge point with the frame 100, thereby adjusting the secondary color sorting device. The tilt angle of the secondary color sorting device 3 keeps it horizontal. When the tilt angle of the secondary color sorting device 3 changes, the suspension shaft weld 42 can rotate through the first tie rod 45, causing the second tie rod 49, which is hinged to the suspension shaft weld 42, to drive the primary color sorting device 2 to move synchronously, thus leveling the entire color sorting system. Its structure is simple and low-cost. It can simultaneously drive two color sorting devices to level synchronously through a telescopic mechanism 47. The control logic is simple, enabling the color sorting devices to achieve optimal operating conditions. It has high versatility and applicability, and is easy to assemble and disassemble, reducing the labor intensity of operators and saving labor and material costs. Optionally, the level 6 can also be installed on the primary color sorting device 2.

[0049] In this embodiment, the primary color sorting device 2 includes a color sorting frame 21, a color sorting belt 22 for carrying and conveying the material flow, a color sorting drive mechanism for driving the color sorting belt 22, a color sorting photoelectric mechanism 28 for color recognition of the material flow, and a color sorting finger mechanism 29 for sorting the material. The color sorting belt 22, the color sorting drive mechanism, and the color sorting photoelectric mechanism 28 are all arranged on the color sorting frame 21, and the color sorting finger mechanism 29 is arranged below the color sorting photoelectric mechanism 28. The color sorting frame 21 is located near the color sorting finger mechanism 29. One end of the color sorting frame 21 is connected to the suspension leveling device 4, and the other end, away from the color sorting spring mechanism 29, is hinged to the frame. One end of the color sorting frame 21 is hinged to the frame 100. The color sorting belt 22 is an annular belt used to receive tomato material from the color sorting pre-conveying device 1 and convey the tomato material to the color sorting photoelectric mechanism 28. The color sorting photoelectric mechanism 28 is fixedly connected to the color sorting mounting frame 26. Its function is to identify impurities such as green fruits and soil clods falling from the color sorting belt 22 by color and provide feedback to the processor. The secondary color sorting device 3 has the same structure as the primary color sorting device 2. Optionally, the color sorting frame 21 is connected to the color sorting mounting frame 26. The color sorting photoelectric mechanism 28 is connected to the color sorting frame 21 through the color sorting mounting frame 26. One end of the color sorting mounting frame 26 is fixedly connected to the color sorting frame 21, and the other end is hinged to the suspension leveling device 4. Optionally, the mounting holes on the color sorting mounting frame 26 are elongated holes, which can adjust the positions of the color sorting photoelectric mechanism 28 and the color sorting frame 21 as needed; the color sorting snap mechanism 29 removes impurities such as green fruits and soil clods from the tomato material that is thrown down, thus completing the sorting of the tomato material.

[0050] In this embodiment, the color sorting drive mechanism includes an active roller 23, a second bearing 25, and a color sorting motor 27. The output shaft of the color sorting motor 27 is connected to the active roller 23. A second groove 211 is provided on the color sorting frame 21. The second bearing 25 can move along the second groove 211 and be positioned after moving. The active roller 23 is rotatably connected to the second bearing 25. The active roller 23 is rotatably connected to the frame 100 through the second bearing 25. The driven roller is installed on the front side of the color sorting frame 21. The color sorting belt 22 is an annular belt, which is fitted on the active roller 23 and the driven roller. By adjusting the installation position of the second bearing 25 in the second groove 211, the tension of the color sorting belt 22 can be adjusted. The color sorting motor 27 is a power source that drives the active roller 23 to rotate through a coupling.

[0051] In this embodiment, the color sorting snap-finger mechanism 29 includes a snap-finger mounting frame 291 for connecting the color sorting photoelectric mechanism 28, a snap-finger mounting block 292 arranged on the snap-finger mounting frame 291, a snap-finger 294 hinged to the snap-finger mounting block 292, and a cylinder 293 for driving the snap-finger 294. The cylinder 293 drives the snap-finger 294 to reciprocate around the hinge point, thereby removing impurities such as green fruits and soil clods from the tomato material that is thrown down, thus completing the sorting of the tomato material.

[0052] In this embodiment, the pre-unloading conveying device 5 includes a pre-unloading conveying frame 51 mounted on the frame, a second support roller 54 mounted on the pre-unloading conveying frame 51, a pre-unloading conveying chain 52 supported by the second support roller 54, and a pre-unloading drive mechanism for driving the pre-unloading conveying chain 52. The unloading pre-drive shaft assembly 53, the second driven wheel 55, the unloading pre-chain drive assembly 56, and the motor 57 are included. The unloading pre-conveying frame 51 is fixedly connected to the frame 100. The motor 57 drives the unloading pre-drive shaft assembly 53 to rotate through the unloading pre-chain drive assembly 56. The unloading pre-conveying chain 52 meshes with the unloading pre-drive shaft assembly 53 and, as the unloading pre-drive shaft assembly 53 rotates, conveys the tomato material falling on it backward. The structure of the unloading pre-conveying chain 52 is the same as that of the color sorting pre-conveying chain 12. It adopts two parallel belts, which are riveted together in the middle by connecting rods. The spacing between the connecting rods is consistent with the sprocket pitch. The spacing between the connecting rods also plays a screening function during the tomato conveying process, which can remove smaller tomatoes and small clods of soil from the tomato material.

[0053] A tomato harvester includes the aforementioned color sorting system assembly.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A color sorting system assembly, characterized in that, It includes a color sorting pre-conveying device (1), a primary color sorting device (2), a secondary color sorting device (3) and a discharge pre-conveying device (5) arranged in sequence, and also includes a suspension leveling device (4) for synchronously adjusting the positions of the primary color sorting device (2) and the secondary color sorting device (3) and keeping them horizontal. The color sorting pre-conveying device (1) includes a color sorting pre-conveying frame (11) mounted on a frame, a first support roller (15) mounted on the color sorting pre-conveying frame (11), a color sorting pre-conveying chain (12) supported by the first support roller (15), a color sorting pre-drive mechanism for driving the color sorting pre-conveying chain (12) to operate, and a cleaning mechanism (16) for cleaning the color sorting pre-conveying chain (12). The color sorting pre-conveying chain (12) includes a conveying section (1201) and a return section (1202). The cleaning mechanism (16) is arranged on the return section (1202). The conveying section (1201) includes a horizontal section (12011) and an inclined section (12012) arranged at an angle to the horizontal section (12011). The color sorting pre-conveying frame (11) is provided with a movable adjusting wheel (111) that is positioned after movement. The adjusting wheel (111) is rolledly connected to the middle of the inclined section (12012) to adjust the conveying angle and throwing angle of the inclined section (12012). The suspension leveling device (4) includes a first suspension support beam (41), a suspension shaft weld (42), a second suspension support beam (43), a first bearing with a seat (44), a first tie rod (45), a second tie rod (49), a first connecting beam (46), a second connecting beam (48), and a telescopic mechanism (47). The first suspension support beam (41) and the second suspension support beam (43) are spaced apart on the frame. The two ends of the suspension shaft weld (42) are rotatably connected to the first suspension support beam (41) and the second suspension support beam (43) respectively through the first bearing with a seat (44). One end of the telescopic mechanism (47) is hinged to the first suspension support beam (41), and the other end is hinged to the first connecting beam (46). The first connecting beam (46) and the second connecting beam (48) are arranged in parallel. The two ends of the first tie rod (45) are respectively welded and hinged to the first connecting beam (46) and the suspension shaft (42). The two ends of the second tie rod (49) are respectively welded and hinged to the second connecting beam (48) and the suspension shaft (42). The first connecting beam (46) and the second connecting beam (48) are adjusted in height synchronously by the telescopic mechanism (47).

2. The color sorting system assembly according to claim 1, characterized in that, The color sorting pre-drive mechanism includes a color sorting pre-drive shaft assembly (13), a color sorting pre-chain drive assembly (17), and a color sorting pre-motor (18) arranged on the color sorting pre-conveyor frame (11). The color sorting pre-motor (18) drives the color sorting pre-drive shaft assembly (13) to rotate through the color sorting pre-chain drive assembly (17). The color sorting pre-drive shaft assembly (13) drives the color sorting pre-conveyor chain (12) to rotate. The color sorting pre-motor (18) is mounted on the inner side of the color sorting pre-conveyor frame (11). The color sorting pre-drive shaft assembly (13) includes a color sorting pre-drive shaft (131) rotatably connected to the color sorting pre-conveyor frame (11) and a color sorting pre-drive shaft sleeved on the color sorting pre-conveyor frame (11). The front drive shaft (131) has an expansion sleeve (133) and a conveyor sprocket (132) fitted on the expansion sleeve (133) and meshing with the color sorting front conveyor chain (12). The expansion sleeve (133) includes a conical sleeve (1331) fitted on the color sorting front drive shaft (131), a tensioning sleeve (1332) for connecting the conveyor sprocket (132), and a screw (1333) for connecting the conical sleeve (1331) and the tensioning sleeve (1332). The inner hole of the tensioning sleeve (1332) is an inner cone shape adapted to the conical sleeve (1331). Both the conical sleeve (1331) and the tensioning sleeve (1332) have notches.

3. The color sorting system assembly according to claim 2, characterized in that, The cleaning mechanism (16) includes a cleaning mounting frame (161), a cleaning sprocket (162), a cleaning rod (164), a bearing (165), and a spring (163). The two cleaning sprockets (162) are coaxially arranged and rotatably connected to the corresponding cleaning mounting frame (161) through the bearing (165). The two ends of the cleaning rod (164) are respectively connected to the corresponding teeth of the two cleaning sprockets (162). The cleaning sprocket (162) meshes with the color sorting pre-conveying chain (12). The middle part of the cleaning mounting frame (161) is hinged to the color sorting pre-conveying frame (11). The first end of the spring (163) is connected to the end of the cleaning mounting frame (161) away from the bearing (165), and the second end of the spring (163) is connected to the color sorting pre-conveying frame (11).

4. The color sorting system assembly according to claim 1, characterized in that, One end of the primary color sorting device (2) is hinged to the frame, and the other end is connected to the second connecting beam (48). One end of the secondary color sorting device (3) is hinged to the frame, and the other end is connected to the first connecting beam (46). The axial length of the second tie rod (49) is less than the axial length of the first tie rod (45). The primary color sorting device (2) or the secondary color sorting device (3) is equipped with a level (6) and a controller for receiving the angle signal detected by the level (6). The controller is electrically connected to the telescopic mechanism (47).

5. The color sorting system assembly according to claim 1, characterized in that, The primary color sorting device (2) includes a color sorting frame (21), a color sorting belt (22) for carrying and conveying the material flow, a color sorting drive mechanism for driving the color sorting belt (22), a color sorting photoelectric mechanism (28) for color recognition of the material flow, and a color sorting finger mechanism (29) for sorting the material. The color sorting belt (22), the color sorting drive mechanism, and the color sorting photoelectric mechanism (28) are all arranged on the color sorting frame (21). The color sorting finger mechanism (29) is arranged below the color sorting photoelectric mechanism (28). The end of the color sorting frame (21) near the color sorting finger mechanism (29) is connected to the suspension leveling device (4), and the end away from the color sorting finger mechanism (29) is hinged to the frame. The secondary color sorting device (3) has the same architecture as the primary color sorting device (2).

6. The color sorting system assembly according to claim 5, characterized in that, The color sorting drive mechanism includes an active roller (23), a second bearing seat (25), and a color sorting motor (27). The output shaft of the color sorting motor (27) is connected to the active roller (23). A second groove (211) is provided on the color sorting frame (21). The second bearing seat (25) can move along the second groove (211) and be positioned after moving. The active roller (23) is rotatably connected to the second bearing seat (25).

7. The color sorting system assembly according to claim 6, characterized in that, The color sorting snap mechanism (29) includes a snap mounting bracket (291) for connecting the color sorting photoelectric mechanism (28), a snap mounting block (292) arranged on the snap mounting bracket (291), a snap (294) hinged to the snap mounting block (292), and a cylinder (293) for driving the snap (294).

8. The color sorting system assembly according to claim 1, characterized in that, The pre-unloading conveying device (5) includes a pre-unloading conveying frame (51) mounted on the frame, a second support roller (54) mounted on the pre-unloading conveying frame (51), a pre-unloading conveying chain (52) supported by the second support roller (54), and a pre-unloading drive mechanism for driving the pre-unloading conveying chain (52) to operate.

9. A tomato harvester, characterized in that, The color sorting system assembly includes any one of claims 1 to 8.

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