Dicing device and dicing method for blanket rice seedling throwing machine

Abstract

The invention relates to a rice blanket seedling throwing machine dicing device and a dicing method thereof.The rice blanket seedling throwing machine dicing device comprises a support stretching across a seedling box, cutter mechanisms and a driving mechanism are arranged on the support, and the driving mechanism is used for driving the cutter mechanisms to act so as to cut a seedling blanket longitudinally conveyed from the upper portion of the seedling box to the lower portion of the seedling box; the multiple sets of cutter mechanisms are arranged on the support in the transverse direction in an up-down moving and rotating mode, the driving mechanism comprises a cutter downward-pressing driving assembly and a cutter steering driving assembly, and the driving end of the cutter downward-pressing driving assembly and the driving end of the cutter steering driving assembly are both connected with the multiple sets of cutter mechanisms. All the cutter mechanisms can be driven by the cutter downward pressing driving assembly to move up and down at the same time so as to longitudinally cut the seedling blanket into strips, and can be driven by the cutter steering driving assembly to steer by 90 degrees at the same time so as to transversely cut the longitudinal strips of the seedling blanket into blocks. The device has the advantages of being simple and compact in structure, high in cutting efficiency, good in seedling block soil bowl integrity, small in root damage and the like.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery, and in particular to a rice blanket seedling broadcasting machine cutting device and a cutting method thereof. Background Art

[0002] There are two main methods of mechanized rice transplanting: organic transplanting and machine seedling throwing. The seedlings used in machine transplanting are blanket seedlings, which have the advantages of mature technology, high efficiency and low investment. However, there are many limitations of blanket seedling machine transplanting, which restricts the full realization of rice yield potential: when the blanket seedlings are transplanted by machine, the seedling claws tear off the blanket roots, causing serious damage to the seedling roots, and there is a 5-7 day seedling recovery period after planting; when the seedling claws pick the seedlings, the seedling blanket is torn, and the root matrix wrapped is pulled apart, causing the roots to be exposed. When planting, the seedling pot is incomplete and irregular, and the root growth matrix and nutrients cannot be fully retained, which is not conducive to the seedling recovery after transplanting; the planting depth is large, generally 2-4 cm, which affects the seedling recovery and early growth of the seedlings, and the high-node tillers are more, reducing the ear formation rate. Rice seedling throwing is a high-yield and high-quality cultivation agronomic technology. It uses seedlings in pots. Compared with blanket seedling machine transplanting, the seedlings are in independent pots, there is no plant injury during transplanting, the seedling block soil pot is complete, the seedling throwing depth is shallow, and it has the characteristics of fast greening, more effective tillers at low nodes, no extension of rice growth period, and significant yield increase effect. However, the seedling raising technology of pot seedlings is high, especially the price of seedling trays is expensive, resulting in high seedling raising costs and high labor demand; the seedling throwing machine mainly relies on the technology introduced from Japan, which is expensive and has a complex structure. All of the above greatly increase the production cost of the machine throwing seedlings, resulting in low overall efficiency.

[0003] Using rice blanket seedlings for seedling throwing is an effective way to solve the problems of rice blanket seedling machine transplanting and pot seedling machine throwing. It combines the advantages of blanket seedling raising technology, which is mature, efficient and low-investment, and the advantages of high-quality agronomic technology such as complete soil pots, shallow planting, and no root damage of pot seedlings. Before the blanket seedling machine throws the seedlings, the seedling blanket must first be divided into separate and complete seedling blocks. Therefore, the block cutting device is the core working part of the rice blanket seedling throwing machine, which determines the quality of the machine throwing. At present, the block cutting of the blanket seedling throwing machine requires multi-level mechanism cutting, which is not only complex in structure, but also has large cutting resistance and low efficiency. The cutting accuracy cannot be guaranteed, resulting in poor integrity of the seedling block soil pot and severe root damage. The above problems reduce the quality of seedling throwing, which is not conducive to the potential of rice blanket seedling machine to increase production and efficiency.

[0004] For example, the invention patent application with application number 202311235714.6 proposes "a rice pot blanket seedling cutting and throwing device", which includes a seedling pushing mechanism, a strip cutting mechanism, a block cutting mechanism, a seedling dropping mechanism and other mechanisms. A strip cutting station, a block cutting station and a seedling dropping station are arranged in sequence along the conveying direction. The strip cutting mechanism is arranged at the strip cutting station and is used to cut the rice pot blanket seedlings into seedlings. The block cutting mechanism is arranged at the block cutting station and is used to cut the seedlings into block seedlings. The block seedlings are thrown in the seedling dropping mechanism. The strip cutting mechanism of this device adopts the form of a disc knife. First, this method has large cutting resistance. Second, the disc knife surface is in contact with the side of the seedling at all times. The seedling blanket generally has a high moisture content. The knife surface and the side of the seedling produce a large adsorption force and friction force, which forces the seedlings to be sent longitudinally. The seedling blanket is prone to arching and stacking and motor overload, and causes the cut seedlings to swing. After the strip cutting is completed, a cutting mechanism is required to perform transverse cutting. The cutting knife of the cutting structure cuts all the seedlings transversely from the bottom of the seedling loading platform upward, and a seedling pressing rod needs to be adapted for each seedling. The disadvantages are: it increases the complexity of the structure, requires a large and fast penetration cutting force, the device vibrates greatly, and the cutting efficiency is low.

[0005] Chinese invention patent CN 117099541B proposes "a rice blanket seedling high-speed cutting and orderly throwing machine and cutting and throwing method", including a longitudinal seedling feeding mechanism, a longitudinal cutting knife mechanism, a transverse cutting knife mechanism, a planting mechanism, etc. The throwing seedling block soil pot has good integrity, and has the characteristics of high speed, shallow planting, small plant injury, and no re-greening period. However, the longitudinal strip cutting and transverse cutting of this throwing planter are completed by two sets of mechanisms, which increases the complexity of the whole machine; the cutting knife of the transverse cutting knife mechanism cuts a single seedling transversely from the bottom of the seedling box upward, which not only requires a high-speed and large penetration cutting force, but also has large vibration of the device and low cutting efficiency, and its transverse cutting accuracy is difficult to guarantee. Summary of the invention

[0006] In view of the defects of the prior art, the object of the present invention is to provide a rice blanket seedling broadcasting machine cutting device and a cutting method thereof which have simple structure, small cutting resistance and high efficiency, good integrity of seedling pots after cutting, and little root damage.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: A rice blanket seedling transplanter cutting device is installed at the lower part of the transplanter seedling box, including a bracket spanning the seedling box, the bracket is provided with a cutting knife mechanism and a driving mechanism, the driving mechanism is used to drive the cutting knife mechanism to cut the seedling blanket longitudinally transported from the upper part of the seedling box to the lower part, the cutting knife mechanism is provided with a plurality of groups, and is arranged on the bracket in a transverse arrangement in a manner that can move up and down and rotate, the driving mechanism includes a cutting knife pressing driving assembly and a cutting knife steering driving assembly, the driving ends of the cutting knife pressing driving assembly and the cutting knife steering driving assembly are connected to the plurality of groups of cutting knife mechanisms, all the cutting knife mechanisms can simultaneously realize up and down movement under the drive of the cutting knife pressing driving assembly to cut the seedling blanket longitudinally, and all the cutting knife mechanisms can also simultaneously realize 90° steering under the drive of the cutting knife steering driving assembly to cut the longitudinal strips of the seedling blanket transversely.

[0008] As a further improvement of the above technical solution: Furthermore, the cutting device also includes a lower seedling box bottom plate corresponding to each upper seedling box bottom plate of the seedling box, the upper end of the lower seedling box bottom plate is fixedly connected to the lower end of the upper seedling box bottom plate, the width of the two are consistent and the upper surfaces are flush, the lower end of the lower seedling box bottom plate is in sliding contact with the slide rail of the seedling throwing machine, the lower seedling box bottom plate is U-shaped, including a middle plate and side plates connected to both sides of the middle plate, the two adjacent lower seedling box bottom plates are fixedly connected into a whole by the side plates, the bottom end of the bracket is installed on the upper end surface of the side plate, and the cutting knife mechanism located above the same lower seedling box bottom plate constitutes a cutting unit, and each cutting unit is a seedling blanket cut delivered to the lower seedling box bottom plate.

[0009] Furthermore, the support includes an upper crossbeam support, an upper crossbeam support bottom plate, a lower fixed crossbeam and an upper fixed crossbeam, the upper crossbeam support and the upper crossbeam support bottom plate are horizontally arranged and span the seedling box, the upper crossbeam support and the upper crossbeam support bottom plate are connected by a number of evenly spaced crossbeam support side plates to form a grid corresponding to each cutting unit, and the lower end of each crossbeam support side plate is respectively mounted on the upper end surface of one side plate through a lower support; the lower fixed crossbeam and the upper fixed beam both span the back of the seedling box, the lower fixed crossbeam is located below the upper fixed crossbeam and connected to the bottom plates of each lower seedling box, the upper side of the upper fixed crossbeam is connected to the bottom plates of each upper seedling box, and the lower side is connected to the bottom plates of each lower seedling box; a number of through holes are provided on the bottom plate of the upper crossbeam support, and the cutting knife mechanism is vertically penetrated into the through holes, the upper end is located in the grid, and the lower end is located above the seedling blanket.

[0010] Furthermore, the cutting knife mechanism includes a vertically arranged knife shaft and a sliding cutter, the knife shaft passes through the through hole on the bottom plate of the upper beam bracket, and a compression plate is provided on the top of the knife shaft and is located in the grid; the cross-section of the sliding cutter is rectangular, the upper end of the sliding cutter is fixedly connected to the lower end of the knife shaft by bolts, the lower end of the sliding cutter is provided with a sliding cutting edge and the side is not edged, and the height of the sliding cutter is greater than the thickness of the seedling blanket; in the initial state, the sliding cutting edge of the sliding cutter is parallel to the longitudinal seedling feeding direction, and the tip of the knife is within 10 mm from the upper surface of the seedling blanket.

[0011] Furthermore, a longitudinal knife groove corresponding to the sliding cutter in the same cutting block unit and a transverse knife groove running through the center position of each longitudinal knife groove are provided on the lower end of the middle plate of each lower seedling box bottom plate. The transverse knife groove is a through groove, and its two ends are connected to the side plates on both sides of the corresponding lower seedling box bottom plate. The distance between adjacent longitudinal knife grooves is equal and equal to the width of the last cut seedlings. The groove widths of the longitudinal knife groove and the transverse knife groove are slightly larger than the thickness of the sliding cutter. The length of the longitudinal knife groove, the longitudinal seedling feeding distance each time and the width of the sliding cutter are consistent.

[0012] Furthermore, the cutter pressing drive assembly includes a first driving shaft, a first synchronous belt transmission, a first motor, a cam and a pressure plate. The first driving shaft is horizontally arranged in a through hole formed on the side plate of each upper beam bracket. The first motor is mounted on one end of the lower fixed beam and the upper fixed beam through a motor bracket. The output shaft of the first motor is connected to one end of the first driving shaft through the first synchronous belt transmission. A cam is arranged in the middle of each cutting unit on the first driving shaft. The cam is provided with a near rest angle, a push motion angle and a far The repose angle and return motion angle, wherein the return motion angle is 0°, which is a quick return recess; the pressure plate is located below the cam and is horizontally inserted into the pressure plate limit grooves provided on the side plates of each upper crossbeam bracket, the upper surface of the pressure plate contacts the cam and can move along its contour curve to achieve quick return motion, the lower surface of the pressure plate contacts the upper end surface of the compression plate at the top of the knife shaft, each knife shaft is sleeved with a spring, the upper end of the spring contacts the lower end surface of the compression plate, and the lower end of the spring contacts the cutter steering drive assembly; every time the cam rotates 180°, the sliding cutter can achieve one downward and upward movement.

[0013] Furthermore, the cutter steering drive assembly includes a second motor, a second synchronous belt drive, a second drive shaft, a plurality of bevel gear pairs and a steering gear box. The second drive shaft spans the seedling box and is horizontally inserted into the through holes opened on each lower bracket. The second motor is mounted on the other end of the lower fixed beam and the upper fixed beam through a motor bracket, and the output shaft of the second motor is connected to one end of the second drive shaft through the second synchronous belt drive. The steering of the sliding cutter of each cutting unit is driven by a steering gear box, and each steering gear box is horizontally mounted on the bottom plate of the upper beam bracket, and the upper end surface of the steering gear box contacts the lower end of each spring. Each cutting unit is provided with a group of bevel gear pairs, and the input end of each bevel gear pair is mounted on the second drive shaft, and the output end of each bevel gear pair is connected to the input end of the corresponding steering gear box through a third drive shaft that passes upward through the bottom plate of the upper beam bracket.

[0014] Furthermore, the steering gear box includes an L-shaped shell, in which a power input gear, a transition gear and a plurality of mutually meshing steering gears arranged in an L shape are horizontally installed, and the plurality of steering gears are arranged in a transverse direction and correspond one to one with the knife shafts in each cutting unit; the power input gear is installed at the upper end of the third drive shaft, one side of the transition gear is meshed with the power input gear in the longitudinal direction, and the other side is meshed with the adjacent steering gear in the transverse direction for transmission, the knife shaft passes through the steering gear box from top to bottom and is inserted in the center hole of the corresponding steering gear to be driven to steer, and can move up and down, the steering gear drives each knife shaft to rotate to realize the steering of the sliding cutter, and the steering between adjacent sliding cutters is opposite; every time the bevel gear pair rotates 90°, the side surface of the sliding cutter can realize a reversal parallel and perpendicular to the longitudinal seedling feeding direction.

[0015] Furthermore, the L-shaped shell includes an upper shell and a lower shell, and corresponding through holes are provided on the upper shell and the lower shell. The upper end of the knife shaft passes through the through hole of the upper shell, and the lower end passes through the through holes of the lower shell and the upper beam bracket bottom plate and is limited by the knife shaft limit sleeve.

[0016] Furthermore, the knife shaft, the first drive shaft, the second drive shaft and the third drive shaft are all hexagonal shafts, the center holes of the power input gear and the steering gear are all hexagonal holes, and the transmission ratios of the first synchronous belt drive, the second synchronous belt drive and each gear pair are all 1:1.

[0017] As a general inventive concept, the present invention also provides a method for cutting blanket seedlings using the above-mentioned rice blanket seedling throwing machine cutting device, comprising the following steps: 1) In the initial position, the near-rest angle contour curve of the cam contacts the upper surface of the pressure plate, the spring is in the reset state, the sliding cutter is located directly above the seedling blanket and does not contact it, and the side of the cutter is parallel to the longitudinal direction of seedling feeding; 2) The seedling box moves horizontally to the extreme position on one side of the slide rail, and the longitudinal seedling conveying belt of the seedling box longitudinally conveys the seedling blanket placed on the bottom plate of the upper seedling box to the bottom plate of the lower seedling box; 3) At the moment when the longitudinal seedling feeding belt completes one longitudinal seedling feeding, the first motor in the cutter pressing drive assembly starts, and its output shaft rotates 90°, and the cam is driven to rotate 90° through the first synchronous belt transmission. The cam rotation angle passes through the near repose angle, the push motion angle, and the far repose angle. This process is the process of pressing the pressure plate downward. The pressure plate presses down the knife shaft. When the spring is fully compressed, one longitudinal strip cutting is completed; 4) The output shaft of the first motor continues to rotate 90°, and the cam is driven to rotate 90° through the first synchronous belt. The cam rotation angle passes through the far rest angle, the return motion angle, and the near rest angle. Since the return motion angle is 0°, the pressure plate returns sharply under the action of the spring force, and the sliding cutter quickly resets upward. After resetting, the state of the sliding cutter is consistent with step 1); 5) The second motor in the cutter steering drive assembly starts, and its output shaft rotates 90°, driving the steering gearbox through the second synchronous belt. All gears in the steering gearbox rotate 90° synchronously, thereby driving the cutter shaft to rotate 90°, and the side surface of the sliding cutter changes from being parallel to the longitudinal seedling feeding direction to being perpendicular to it; 6) The output shaft of the first motor continues to rotate 90°, and the cam is driven to rotate 90° through the first synchronous belt. The cam rotation angle passes through the near repose angle, the thrust motion angle, and the far repose angle. This process is the process of pressing the pressure plate downward. The pressure plate presses down the knife shaft. When the spring is fully compressed, the transverse cutting of the longitudinal strip is completed; 7) The output shaft of the first motor continues to rotate 90°, and the cam is driven to continue to rotate 90° through the first synchronous belt drive. The cam rotation angle passes through the distal rest angle, the return motion angle, and the proximal rest angle. Since the return motion angle is 0°, the pressure plate returns sharply under the action of the spring force, and the sliding cutter quickly resets upward; then, the output shaft of the second motor rotates 90°, and the side surface of the sliding cutter changes from a state perpendicular to the longitudinal seedling feeding direction to a state parallel to it. At this time, the working state of the sliding cutter is consistent with step 1).

[0018] Compared with the prior art, the present invention has the following advantages: The rice blanket seedling throwing machine slicing device and slicing method of the present invention have simple structure, reasonable and compact structure. When the seedling blanket passes under the slicing device, it is first cut into strips longitudinally and then cut into blocks transversely. The longitudinal strip cutting and transverse block cutting are completed by a set of cutting knife mechanisms, and the cutting is intermittent. When the seedlings are sent longitudinally, the sliding cutter does not contact the seedling blanket, and there is no resistance to the longitudinal sending of the seedlings. Not only is the cutting resistance small and the efficiency high, but also the integrity of the soil pot of the seedling block is good after cutting, and the root system is less damaged, so that the blanket seedling slicing and throwing has the technical advantage of early growth and fast development of pot seedling cultivation, and can give full play to the potential of rice yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front three-dimensional structural schematic diagram of the block cutting device of the present invention when in use.

[0020] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the front side of the cutting device of part A.

[0021] Figure 3 yes Figure 1 An enlarged structural diagram of the back side of the A-part cutting device.

[0022] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure of the B-section cutting unit; Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of the C-section cutting unit.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the back side of the block cutting device of the present invention when it is used.

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the steering gear box in the block cutting device of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the internal gear drive of the steering gear box in the present invention.

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the crossbeam support in the block cutting device of the present invention.

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the lower bracket in the block cutting device of the present invention.

[0028] Fig.11 The assembly structure of the knife shaft and the sliding cutter in the present invention is shown in FIG. Figure 1 (The edge line is tilted downward on one side) Fig.12 The assembly structure of the knife shaft and the sliding cutter in the present invention is shown in FIG. Figure 2 (The edge line is symmetrically inclined downward from both sides).

[0029] Fig.13 It is a front three-dimensional structural schematic diagram of the bottom plate of the lower seedling box in the present invention.

[0030] Fig.14 It is a schematic diagram of the three-dimensional structure of the back side of the bottom plate of the lower seedling box in the present invention.

[0031] Fig.15 It is a schematic diagram of a state in which the seedling box of the present invention slides to the leftmost side along the slide rail.

[0032] Fig.16It is a schematic diagram of a state in which the seedling box of the present invention slides to the rightmost side along the slide rail.

[0033] Fig.17 It is a schematic diagram of the local three-dimensional structure of working step 1) of the method of the present invention.

[0034] Fig.18 It is a schematic diagram of the local three-dimensional structure of working step 2) of the method of the present invention.

[0035] Fig.19 It is a schematic diagram of the local three-dimensional structure of working step 3) of the method of the present invention.

[0036] Fig. 20 It is a schematic diagram of the local three-dimensional structure of working step 4) of the method of the present invention.

[0037] Fig.21 It is a schematic diagram of the local three-dimensional structure of working step 5) of the method of the present invention.

[0038] Fig. 22 It is a schematic diagram of a local three-dimensional structure of working step 6) of the method of the present invention.

[0039] Fig.23 It is a schematic diagram of the local three-dimensional structure of working step 7) of the method of the present invention.

[0040] Legend: 1. Bottom plate of upper seedling box; 2. Upper bracket of seedling pressing rod; 3. Seedling pressing rod; 4. Lower bracket of seedling pressing rod; 5. Seedling guide rod; 6. Slide rail; 7. Upper crossbeam bracket; 8. First drive shaft; 9. First driven synchronous pulley; 10. First synchronous belt; 11. Cam; 12. Second driven synchronous pulley; 13. Second synchronous belt; 14. Second active synchronous pulley; 15. Second motor; 16. Lower bracket; 17. Second drive shaft; 18. Lower fixed crossbeam; 19. Upper fixed crossbeam; 20. Active bevel gear; 21. Driven bevel gear; 22. Bottom plate of lower seedling box; 23. The first motor; 24. The first active synchronous pulley; 25. The spring; 26. The upper shell; 27. The pressure plate; 28. The lower shell; 29. ​​The knife shaft; 30. The sliding cutter; 31. The motor bracket; 32. The longitudinal seedling feeding belt; 33. The third driving shaft; 34. The power input gear; 35. The transition gear; 36. The steering gear; 37. The knife shaft limiting sleeve; 38. The upper crossbeam bracket side plate; 39. The upper crossbeam bracket bottom plate; 40. The pressure plate limiting groove; 41. The longitudinal knife groove; 42. The side plate; 43. The transverse knife groove; 44. The seedling blanket; 45. The seedling block soil pot. DETAILED DESCRIPTION

[0041] The invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Cutting device embodiment: like Figure 1-Figure 23 As shown, the rice blanket seedling throwing machine block cutting device of this embodiment is installed at the lower part of the seedling box of the throwing machine, and the block cutting device includes a bracket across the seedling box, a cutting knife mechanism and a driving mechanism, and the cutting knife mechanism is provided with a plurality of groups, and is arranged on the bracket in a horizontal arrangement in a manner that it can move up and down and can rotate, and the driving mechanism includes a cutting knife pressing driving assembly and a cutting knife steering driving assembly, and the driving ends of the cutting knife pressing driving assembly and the cutting knife steering driving assembly are connected to a plurality of groups of cutting knife mechanisms, and all the cutting knife mechanisms can simultaneously realize up and down movement under the drive of the cutting knife pressing driving assembly to longitudinally cut the seedling blanket 44, and all the cutting knife mechanisms can also realize 90° steering at the same time under the drive of the cutting knife steering driving assembly to transversely cut the longitudinal strips of the seedling blanket 44. The structure of the present invention is simple, reasonable and compact, and the seedling blanket is first longitudinally cut and then transversely cut when passing under the cutting knife device, and the longitudinal cutting and transverse cutting are completed by a set of cutting knife mechanisms, and intermittent cutting is performed, and the cutting efficiency and cutting quality are improved.

[0043] The seedling box is arranged obliquely, and its angle with the horizontal plane is 50° to 70°, and includes a plurality of upper seedling box bottom plates 1, seedling pressing rods 3, a plurality of longitudinal seedling conveying belts 32 and other mechanisms, and the seedling pressing rods 3 are fixed on the seedling box through the seedling pressing rod upper bracket 2 and the seedling pressing rod lower bracket 4. The seedling box is a prior art and will not be described in detail here.

[0044] In this embodiment, the dicing device further includes a lower seedling box bottom plate 22 corresponding to each upper seedling box bottom plate 1 of the seedling box, the upper end of the lower seedling box bottom plate 22 is fixedly connected to the lower end of the upper seedling box bottom plate 1, the width of the two is consistent and the upper surface is flush, the lower end of the lower seedling box bottom plate 22 is in sliding contact with the slide rail 6 of the seedling throwing machine, and the seedling box can slide left and right on the slide rail 6 when the seedling box is horizontally sending seedlings. The slide rail 6 is evenly arranged with fixed seedling guide rods 5, and each lower seedling box bottom plate 22 corresponds to a seedling guide rod 5. Each upper seedling box bottom plate 1 is equipped with a longitudinal seedling feeding belt 32, and the longitudinal seedling feeding distance of the longitudinal seedling feeding belt 32 is consistent with the longitudinal strip cutting distance of the dicing device. The relationship between the horizontal and longitudinal seedling feeding of the seedling box is as follows: the seedling box moves to the extreme position on one side of the slide rail 6, and the longitudinal seedling feeding belt 32 performs a longitudinal seedling feeding, and then when the seedling box reaches the extreme position on the other side of the slide rail 6, the longitudinal seedling feeding belt 32 performs a longitudinal seedling feeding, thereby performing reciprocating motion.

[0045] In this embodiment, the bottom plate 22 of the lower seedling box is U-shaped, including a middle plate and side plates 42 connected to both sides of the middle plate. The two adjacent bottom plates 22 of the lower seedling box are fixedly connected into a whole through the side plates 42. The bottom end of the bracket is installed on the upper end surface of the side plates 42 connected as a whole. The cutting knife mechanism located above the same bottom plate 22 of the lower seedling box constitutes a cutting unit, and each cutting unit is a cutting block of a seedling blanket 44 transported to the bottom plate 22 of the lower seedling box.

[0046] In this embodiment, the bracket includes an upper crossbeam bracket 7, an upper crossbeam bracket bottom plate 39, a lower fixed crossbeam 18 and an upper fixed crossbeam 19. The upper crossbeam bracket 7 and the upper crossbeam bracket bottom plate 39 are arranged horizontally and span the seedling box. The upper crossbeam bracket 7 and the upper crossbeam bracket bottom plate 39 are connected by a number of evenly spaced upper crossbeam bracket side plates 38 to form a number of squares, and each square corresponds to a block unit. The lower end of each upper crossbeam bracket side plate 38 is fixedly mounted on the upper end of a lower bracket 16, and the lower end of the lower bracket 16 is fixedly mounted on the upper end surface of the side plate 42. The lower fixed crossbeam 18 and the upper fixed crossbeam 19 both span the back of the seedling box. The lower fixed crossbeam 18 is located below the upper fixed crossbeam 19 and is connected to each lower seedling box bottom plate 22, which plays a role in strengthening the connection strength between the lower seedling box bottom plates 22. The upper side of the upper fixed crossbeam 19 is connected to each upper seedling box bottom plate 1, and the lower side is connected to each lower seedling box bottom plate 22, which can not only strengthen the connection strength between the upper seedling box bottom plate 1 and the lower seedling box bottom plate 22, but also strengthen the connection strength between the lower seedling box bottom plates 22. A plurality of through holes are provided on the upper crossbeam support bottom plate 39, and the cutting mechanism is vertically penetrated in the through holes, with the upper end located in the grid and the lower end located above the seedling blanket 44.

[0047] In this embodiment, the cutting mechanism includes a vertically arranged knife shaft 29 and a sliding cutter 30. The knife shaft 29 passes through the through hole on the bottom plate 39 of the upper crossbeam support. A compression plate is provided on the top of the knife shaft 29 and is located in the grid. The cross section of the sliding cutter 30 is rectangular, and the knife shaft 29 is a hexagonal shaft. The upper end of the sliding cutter 30 is fixedly connected to the lower end of the knife shaft 29 by bolts. The lower end of the sliding cutter 30 is provided with a sliding cutting edge. The form of the cutting edge line is not restricted. The direction of the cutting edge line can be tilted downward from one side or symmetrically tilted downward from both sides. In order to prevent the sliding cutter 30 from damaging the stems and leaves of rice, its side is not sharpened. In the initial state, the sliding cutting edge of the sliding cutter 30 is parallel to the longitudinal direction of seedling feeding, and the tip of the knife is within 10 mm from the upper surface of the seedling blanket 44.

[0048] In this embodiment, the lower end of the middle plate of each lower seedling box bottom plate 22 is provided with a longitudinal knife groove 41 corresponding to the sliding cutter 30 in the same cutting block unit and a transverse knife groove 43 running through the center of each longitudinal knife groove 41. The transverse knife groove 43 is a through groove, and its two ends are connected to the side plates 42 on both sides of the corresponding lower seedling box bottom plate 22. The distance between adjacent longitudinal knife grooves 41 is equal and equal to the width of the last cut seedling. The groove width of the longitudinal knife groove 41 and the transverse knife groove 43 is slightly larger than the thickness of the sliding cutter 30. The length of the longitudinal knife groove 41, the longitudinal seedling feeding distance each time, and the width of the sliding cutter 30 are consistent. The height of the sliding cutter 30 is greater than the thickness of the seedling blanket 44. When it is working, it can completely cut through the seedling blanket 44 and the blade can enter the back of the lower seedling box bottom plate 22 through the knife groove.

[0049] In this embodiment, the cutter pressing drive assembly includes a first drive shaft 8, a first synchronous belt drive, a first motor 23, a cam 11 and a pressure plate 27. The first synchronous belt drive includes a first driven synchronous pulley 9, a first synchronous belt 10 and a first active synchronous pulley 24. The transmission ratio of the first driven synchronous pulley 9 and the first active synchronous pulley 24 is 1:1. The first drive shaft 8 is a hexagonal shaft, which is horizontally inserted into the through hole opened on each upper beam bracket side plate 38. The first motor 23 is installed on one end of the lower fixed beam 18 and the upper fixed beam 19 through the motor bracket 31. The first active synchronous pulley 24 is connected to the output shaft of the first motor 23, and the first driven synchronous pulley 9 is connected to one end of the first drive shaft 8. A cam 11 is provided in the middle of each cutting unit on the first driving shaft 8. The cam 11 is provided with a near rest angle, a push motion angle, a far rest angle and a return motion angle for every 180 degrees of rotation, wherein the return motion angle is 0°, which is a quick return concave portion; the pressing plate 27 is located below the cam 11 and is horizontally penetrated in the pressing plate limiting groove 40 provided on each upper crossbeam bracket side plate 38, and the pressing plate limiting groove 40 can limit the pressing plate 27 up and down. The upper surface of the pressing plate 27 contacts with the cam 11 and can move along its contour curve to realize quick return motion, and the lower surface of the pressing plate 27 contacts with the upper end surface of the compression plate at the top of the knife shaft 29. A spring 25 is sleeved on each knife shaft 29, and the upper end of the spring 25 contacts with the lower end surface of the compression plate, and the lower end of the spring 25 contacts with the cutter steering drive assembly.

[0050] The working process of the cutter pressing drive assembly is: The first motor 23 drives the first drive shaft 8 through the first synchronous belt transmission, and the first drive shaft 8 drives the cam 11 of each cutting unit to rotate. When the push motion angle contour curve of the cam 11 contacts the upper end surface of the pressing plate 27, the cam 11 presses down the pressing plate 27, the pressing plate 27 presses down the knife shaft 29, and the compression sheet of the knife shaft 29 presses down the spring 25, so that the sliding cutter 30 moves downward. When the upper end surface of the pressing plate 27 moves from the contour curve of the far rest angle of the cam 11 to the contour curve of the return motion angle, since the return motion angle is 0°, the pressing plate 27 returns sharply under the action of the spring force, so that the sliding cutter 30 quickly resets upward, and at this time, the knife tip is within 10 mm from the upper surface of the rice blanket. Every half turn (180°) of the cam 11 realizes one downward and upward movement of the sliding cutter 30.

[0051] In this embodiment, the cutter steering drive assembly includes a second motor 15, a second synchronous belt drive, a second drive shaft 17, a plurality of bevel gear pairs and a steering gear box, wherein the second synchronous belt drive includes a second driven synchronous pulley 12, a second synchronous belt 13 and a second active synchronous pulley 14, and the transmission ratio of the second driven synchronous pulley 12 and the second active synchronous pulley 14 is 1:1. The second drive shaft 17 is a hexagonal shaft, which spans the seedling box and is horizontally inserted into the through hole opened on each lower bracket 16. The second motor 15 is installed on the other end of the lower fixed beam 18 and the upper fixed beam 19 through the motor bracket 31, and the output shaft of the second motor 15 is connected to one end of the second drive shaft 17 through the second synchronous belt drive. The steering of the sliding cutter 30 of each cutting unit is driven by a steering gear box, and each steering gear box is horizontally installed on the bottom plate 39 of the upper beam bracket, and the upper end surface of the steering gear box contacts the lower end of each spring 25; the bevel gear pair includes an active bevel gear 20 and a driven bevel gear 21. Each cutting unit is provided with a set of active bevel gears 20 and driven bevel gears 21, and the transmission ratio between the two is 1:1. The axis of the active bevel gear 20 is horizontally arranged and sleeved on the second drive shaft 17, and the axis of the driven bevel gear 21 is vertically arranged and sleeved on the lower end of the third drive shaft 33. The third drive shaft 33 is a hexagonal shaft, and the upper end passes through the upper crossbeam bracket bottom plate 39 upward to be connected to the input end of the corresponding steering gear box.

[0052] In this embodiment, the steering gearbox is in a horizontal L-shape, including an L-shaped housing, in which a power input gear 34, a transition gear 35 and a plurality of mutually meshing steering gears 36 arranged in an L-shape are horizontally installed, and the plurality of steering gears 36 are arranged in a horizontal direction and correspond to the knife shaft 29 in each cutting unit. The centers of the power input gear 34 and the steering gear 36 are both provided with a hexagonal hole, and the power input gear 34 is installed at the upper end of the third drive shaft 33. One side of the transition gear 35 meshes with the power input gear 34 in the longitudinal direction, and the other side meshes with the adjacent steering gear 36 in the transverse direction for transmission, and the transmission ratio between the gears is 1:1. The knife shaft 29 passes through the steering gearbox from top to bottom and is inserted into the center hole of the corresponding steering gear 36 to be driven by it to steer, and can move up and down.

[0053] The working process of the cutter steering drive assembly is: The second motor 15 drives the second drive shaft 17 through the second synchronous belt transmission, and the second drive shaft 17 drives the active bevel gear 20 of each cutting unit to rotate, and the active bevel gear 20 drives the corresponding driven bevel gear 21, and the driven bevel gear 21 drives the third drive shaft 33 to rotate, and the power input gear 34 is driven by the third drive shaft 33 and rotates synchronously, thereby realizing the meshing transmission of each steering gear 36 in the steering gear box, and each steering gear 36 drives a knife shaft 29 to rotate, thereby realizing the steering of the sliding cutter 30, and the steering between adjacent sliding cutters 30 is opposite. Every time the active bevel gear 20 rotates 90°, the side of the sliding cutter 30 can realize a reversal parallel to and perpendicular to the longitudinal seedling feeding direction.

[0054] In this embodiment, the L-shaped shell includes an upper shell 26 and a lower shell 28. The upper shell 26 and the lower shell 28 are both provided with corresponding knife shaft through holes. The upper end of the knife shaft 29 passes through the through hole of the upper shell 26, and the lower end passes through the through holes of the lower shell 28 and the upper beam bracket bottom plate 39 and is limited by the knife shaft limit sleeve 37.

[0055] The working principle of the block cutting device of the present invention is as follows: a seedling blanket 44 is placed on the upper seedling box bottom plate 1 from above the seedling box, the seedling pressing rod 3 presses the seedling blanket 44, and the seedling blanket 44 moves to the lower seedling box bottom plate 22 under the action of the longitudinal seedling feeding belt 32. First, the sliding cutter 30 of the cutter mechanism is driven by the cutter pressing drive assembly to press down from above the seedling blanket to cut it longitudinally, and then the sliding cutter 30 is retracted upward to above the seedling blanket, and rotated 90° under the drive of the cutter steering drive assembly, and then pressed down under the drive of the cutter pressing drive assembly to cut it horizontally, and then retracted upward to above the seedling blanket, and the seedling blocks that have been cut reach the seedling taking port under the precise horizontal transfer of the seedling box, and the seedlings are thrown through the guide rod 5 under the action of the seedling throwing claw.

[0056] Example of slicing method: The present invention also provides a method for cutting blanket seedlings into pieces by utilizing the cutting device of the rice blanket seedling throwing machine.

[0057] Taking 14 longitudinal cuts of a 9-inch common blanket seedling as an example, a detailed description is given. Each cutting unit has 13 sliding cutters, and the cutting edge lines of the sliding cutters are symmetrical on both sides and tilted downward. The seedling blanket 44 is a simplified model, which only shows the root blanket formed by the root and the nutrient soil disk, and does not show the stems and leaves above.

[0058] When the first seedling blanket 44 is placed on each upper seedling box bottom plate 1, the seedling throwing machine stops at the original location and runs idle for a period of time until the longitudinal seedling conveying belt 32 continuously and accurately transports the seedling blanket 44 downward to the lower seedling box bottom plate 22 at the bottom of the seedling box. When the seedling blanket 44 passes under the cutting device, it is first cut into strips longitudinally and then cut into pieces transversely. Specifically, the following steps are included: 1) If Fig.17As shown, the cutting device has completed three horizontal rows of cutting, each row of 14 seedling block soil pots 45. Fig.17 The position of the sliding cutter is the initial position. At this time, the near-rest angle contour curve of the cam 11 contacts the upper surface of the pressure plate 27, the spring 25 is in a reset state, the sliding cutter 30 is located directly above the seedling blanket 44 and does not contact it, the tip of the knife is within 10 mm from the upper surface of the seedling blanket, and the side of the knife is parallel to the longitudinal direction of seedling feeding.

[0059] 2) If Fig.18 As shown, the seedling box moves horizontally to the extreme position on one side of the slide rail 6, and the longitudinal seedling conveying belt 32 conveys the seedling blanket 44 placed on the upper seedling box bottom plate 1 longitudinally. The longitudinal seedling conveying distance is consistent with the width of the sliding cutter. When the longitudinal seedling conveying belt is working, the sliding cutter is above the seedling blanket and does not contact the seedling blanket, reducing the longitudinal resistance of seedling conveying. The side of the knife is parallel to the longitudinal seedling conveying direction, playing the role of guiding the seedlings, guiding the seedlings into the channel formed between adjacent sliding cutters, reducing the damage to the stems and leaves above the seedling blanket when the cutter is working.

[0060] 3) If Fig.19 As shown, at the moment when the longitudinal seedling feeding belt 32 completes a longitudinal seedling feeding, the first motor 23 in the cutter pressing drive assembly is started, and its output shaft rotates 90°, and the cam 11 is driven to rotate 90° through the first synchronous belt transmission. The cam rotation angle passes through the near rest angle, the push motion angle, and the far rest angle. This process is the process of pressing the pressure plate 27, and the pressure plate 27 presses down the knife shaft 29. When the spring 25 is fully compressed, a longitudinal cutting is completed.

[0061] 4) If Fig. 20 As shown, the output shaft of the first motor 23 continues to rotate 90°, and the cam 11 is driven to continue to rotate 90° through the first synchronous belt drive. The cam rotation angle passes through the far rest angle, the return motion angle, and the near rest angle. Since the return motion angle is 0°, the pressure plate 27 returns sharply under the spring force of the spring 25, and the sliding cutter 30 quickly resets upward. After resetting, the state of the sliding cutter 30 is consistent with step 1).

[0062] 5) If Fig.21 As shown, the second motor 15 in the cutter steering drive assembly is started, and its output shaft rotates 90°, driving the steering gear box through the second synchronous belt transmission. All gears in the steering gear box rotate 90° synchronously, thereby driving the cutter shaft 29 to rotate 90°, and the side surface of the sliding cutter 30 changes from a state parallel to the longitudinal seedling feeding direction to a state perpendicular to it.

[0063] 6) If Fig. 22As shown, the output shaft of the first motor 23 continues to rotate 90°, and the cam 11 is driven to rotate 90° through the first synchronous belt drive. The cam rotation angle passes through the near rest angle, the thrust motion angle, and the far rest angle. This process is the process of pressing the pressure plate 27 downward, and the pressure plate 27 presses down the knife shaft 29. When the spring 25 is fully compressed, the transverse cutting of the above-mentioned longitudinal cutting strips is completed.

[0064] 7) If Fig.23 As shown, the output shaft of the first motor 23 continues to rotate 90°, and the cam 11 is driven to rotate 90° through the first synchronous belt drive. The cam rotation angle passes through the far rest angle, the return motion angle, and the near rest angle. Since the return motion angle is 0°, the pressure plate 27 returns sharply under the spring force of the spring 25, and the sliding cutter 30 quickly resets upward; then, the output shaft of the second motor 15 rotates 90°, and the side surface of the sliding cutter 30 changes from a state perpendicular to the longitudinal seedling feeding direction to a state parallel to the longitudinal seedling feeding direction. At this time, the working state of the sliding cutter 30 is consistent with step 1).

[0065] When the seedling box is moved transversely to the extreme position on the other side of the slide rail 6, steps 2) to 7) are repeated, and the process is repeated back and forth.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A rice blanket seedling throwing machine cutting device, installed at the lower part of the seedling box of the rice throwing machine, comprising a bracket spanning the seedling box, a cutting mechanism and a driving mechanism are provided on the bracket, and the driving mechanism is used to drive the cutting mechanism to cut the seedling blanket (44) longitudinally transported from the upper part of the seedling box to the lower part, characterized in that: The cutting mechanism is provided with a plurality of groups, and is arranged on the bracket in a transverse arrangement in a manner that allows it to move up and down and to rotate. The driving mechanism comprises a cutting knife pressing driving assembly and a cutting knife turning driving assembly. The driving ends of the cutting knife pressing driving assembly and the cutting knife turning driving assembly are connected to the plurality of cutting knife mechanisms. All the cutting knife mechanisms can simultaneously realize up and down movement under the drive of the cutting knife pressing driving assembly to longitudinally cut the seedling blanket (44). All the cutting knife mechanisms can also simultaneously realize 90° turning under the drive of the cutting knife turning driving assembly to transversely cut the longitudinal strips of the seedling blanket (44) into blocks.

2. The rice blanket seedlings transplanting machine cutting device according to claim 1, characterized in that: The cutting device further comprises a lower seedling box bottom plate (22) corresponding to each upper seedling box bottom plate (1) of the seedling box, the upper end of the lower seedling box bottom plate (22) is fixedly connected to the lower end of the upper seedling box bottom plate (1), the widths of the two are consistent and the upper surfaces are flush, the lower end of the lower seedling box bottom plate (22) is in sliding contact with the slide rail (6) of the seedling throwing machine, the lower seedling box bottom plate (22) is U-shaped, comprising a middle plate and side plates (42) connected to both sides of the middle plate, the side plates (42) of two adjacent lower seedling box bottom plates (22) are fixedly connected to form a whole, the bottom end of the bracket is mounted on the upper end surface of the side plate (42), the cutting knife mechanism located above the same lower seedling box bottom plate (22) constitutes a cutting unit, and each cutting unit is a cutting block of a seedling blanket (44) transported to the lower seedling box bottom plate (22).

3. The rice blanket seedlings transplanting machine cutting device according to claim 2 is characterized by: The support comprises an upper crossbeam support (7), an upper crossbeam support bottom plate (39), a lower fixed crossbeam (18) and an upper fixed crossbeam (19); the upper crossbeam support (7) and the upper crossbeam support bottom plate (39) are arranged horizontally and span the seedling box; the upper crossbeam support (7) and the upper crossbeam support bottom plate (39) are connected by a plurality of upper crossbeam support side plates (38) evenly spaced apart to form a grid corresponding to each cutting unit; the lower end of each upper crossbeam support side plate (38) is respectively mounted on a side plate (42) through a lower support (16). On the upper end surface; the lower fixed crossbeam (18) and the upper fixed crossbeam (19) both span the back of the seedling box, the lower fixed crossbeam (18) is located below the upper fixed crossbeam (19) and is connected to the bottom plates (22) of each lower seedling box, the upper side of the upper fixed crossbeam (19) is connected to the bottom plates (1) of each upper seedling box, and the lower side is connected to the bottom plates (22) of each lower seedling box; a plurality of through holes are provided on the bottom plate (39) of the upper crossbeam support, and the cutting mechanism is vertically penetrated in the through holes, with the upper end being located in the square and the lower end being located above the seedling blanket (44).

4. The rice blanket seedlings transplanting machine cutting device according to claim 3 is characterized by: The cutting mechanism comprises a vertically arranged knife shaft (29) and a sliding cutter (30); the knife shaft (29) passes through a through hole on the bottom plate (39) of the upper crossbeam support; a compression plate is provided on the top of the knife shaft (29) and is located in the square; the cross section of the sliding cutter (30) is rectangular; the upper end of the sliding cutter (30) is fixedly connected to the lower end of the knife shaft (29) by bolts; the lower end of the sliding cutter (30) is provided with a sliding cutting edge and the side edge is not edged; the height of the sliding cutter (30) is greater than the thickness of the seedling blanket (44); in an initial state, the sliding cutting edge of the sliding cutter (30) is parallel to the longitudinal direction of seedling feeding, and the tip of the knife is within 10 mm from the upper surface of the seedling blanket (44).

5. The rice blanket seedlings transplanting machine cutting device according to claim 4, characterized in that: The bottom end of each of the lower seedling box bottom plates (22) is provided with a longitudinal knife groove (41) corresponding to the sliding cutter (30) in the same cutting block unit and a transverse knife groove (43) running through the center of each longitudinal knife groove (41). The transverse knife groove (43) is a through groove, and its two ends are connected to the side plates (42) on both sides of the corresponding lower seedling box bottom plate (22). The distance between adjacent longitudinal knife grooves (41) is equal and equal to the width of the last cut seedling. The groove width of the longitudinal knife groove (41) and the transverse knife groove (43) is slightly larger than the thickness of the sliding cutter (30). The length of the longitudinal knife groove (41), the longitudinal seedling feeding distance each time and the width of the sliding cutter (30) are consistent.

6. The rice blanket seedlings transplanting machine cutting device according to claim 5, characterized in that: The cutter pressing drive assembly comprises a first drive shaft (8), a first synchronous belt drive, a first motor (23), a cam (11) and a pressing plate (27). The first drive shaft (8) is horizontally inserted into a through hole provided on each upper beam bracket side plate (38). The first motor (23) is mounted on one end of the lower fixed beam (18) and the upper fixed beam (19) through a motor bracket (31). The output shaft of the first motor (23) is connected to one end of the first drive shaft (8) through the first synchronous belt drive. A cam (11) is provided in the middle of each cutting unit on the first drive shaft (8). The cam (11) is provided with a near rest angle, a thrust motion angle and a far rest angle every 180 degrees of rotation. and a return motion angle, wherein the return motion angle is 0°, which is a quick return concave portion; the pressing plate (27) is located below the cam (11) and is horizontally inserted into a pressing plate limiting groove (40) provided on each upper crossbeam bracket side plate (38); the upper surface of the pressing plate (27) contacts the cam (11) and can move along its contour curve to achieve a quick return motion; the lower surface of the pressing plate (27) contacts the upper end surface of the compression plate at the top of the knife shaft (29); each knife shaft (29) is sleeved with a spring (25); the upper end of the spring (25) contacts the lower end surface of the compression plate; the lower end of the spring (25) contacts the cutter steering drive assembly; each time the cam (11) rotates 180°, the sliding cutter (30) can achieve a downward and upward movement.

7. The rice blanket seedlings transplanter cutting device according to claim 6, characterized in that: The cutter steering drive assembly comprises a second motor (15), a second synchronous belt drive, a second drive shaft (17), a plurality of bevel gear pairs and a steering gear box. The second drive shaft (17) spans the seedling box and is horizontally inserted into a through hole provided on each lower bracket (16). The second motor (15) is mounted on the lower fixed beam (18) and the other end of the upper fixed beam (19) through a motor bracket (31). The output shaft of the second motor (15) is connected to one end of the second drive shaft (17) through the second synchronous belt drive. The sliding cutter (30) of each cutting unit is driven by a steering gear box, each steering gear box is horizontally mounted on the upper crossbeam support bottom plate (39), and the upper end surface of the steering gear box contacts the lower end of each spring (25); each cutting unit is provided with a set of bevel gear pairs, the input end of each bevel gear pair is mounted on the second drive shaft (17), and the output end of each bevel gear pair is connected to the input end of the corresponding steering gear box through a third drive shaft (33) that passes through the upper crossbeam support bottom plate (39) upward.

8. The rice blanket seedlings transplanter cutting device according to claim 7, characterized in that: The steering gear box comprises an L-shaped housing, in which a power input gear (34), a transition gear (35) and a plurality of mutually meshing steering gears (36) arranged in an L shape are horizontally mounted, and the plurality of steering gears (36) are arranged in a transverse direction and correspond one to one with the knife shafts (29) in each cutting unit; the power input gear (34) is mounted on the upper end of the third drive shaft (33); one side of the transition gear (35) meshes with the power input gear (34) in the longitudinal direction, and the other side meshes with the adjacent steering gear (36) in the transverse direction for transmission; the knife shaft (29) penetrates the steering gear box from top to bottom and is inserted into the center hole of the corresponding steering gear (36) to be driven to steer and can move up and down; the steering gear (36) drives each knife shaft (29) to rotate to realize the steering of the sliding cutter (30), and the steering of adjacent sliding cutters (30) is opposite; every time the bevel gear pair rotates 90 degrees, the side surface of the sliding cutter (30) can realize a reversal parallel to and perpendicular to the longitudinal seedling feeding direction.

9. The rice blanket seedlings transplanting machine cutting device according to claim 8, characterized in that: The L-shaped shell comprises an upper shell (26) and a lower shell (28), and the upper shell (26) and the lower shell (28) are both provided with corresponding through holes, the upper end of the knife shaft (29) passes through the through hole of the upper shell (26), and the lower end passes through the through holes of the lower shell (28) and the upper crossbeam bracket bottom plate (39) and is limited by the knife shaft limiting sleeve (37).

10. The rice blanket seedling transplanter cutting device according to any one of claims 4 to 9, characterized in that: The knife shaft (29), the first drive shaft (8), the second drive shaft (17), and the third drive shaft (33) are all hexagonal shafts, the center holes of the power input gear (34) and the steering gear (36) are all hexagonal holes, and the transmission ratios of the first synchronous belt drive, the second synchronous belt drive, and each gear pair are 1:

1.

11. A method for cutting rice blanket seedlings into pieces using the rice blanket seedling throwing machine cutting device according to any one of claims 6 to 10, characterized in that: The steps include: 1) In the initial position, the near-rest angle profile curve of the cam (11) contacts the upper surface of the pressure plate (27), the spring (25) is in a reset state, the sliding cutter (30) is located directly above the seedling blanket (44) and does not contact it, and the side surface of the cutter is parallel to the longitudinal direction of seedling feeding; 2) The seedling box is moved horizontally to the extreme position on one side of the slide rail (6), and the longitudinal seedling conveying belt (32) of the seedling box conveys the seedling blanket (44) placed on the bottom plate (1) of the upper seedling box to the bottom plate (22) of the lower seedling box longitudinally. 3) At the moment when the longitudinal seedling conveying belt (32) completes one longitudinal seedling conveying, the first motor (23) in the cutter pressing drive assembly is started, and its output shaft rotates 90°, and the cam (11) is driven to rotate 90° through the first synchronous belt. The cam rotation angle passes through the near rest angle, the thrust motion angle, and the far rest angle. This process is the process of pressing the pressing plate (27). The pressing plate (27) presses down the knife shaft (29). When the spring (25) is fully compressed, one longitudinal strip cutting is completed; 4) The output shaft of the first motor (23) continues to rotate 90°, and the cam (11) is driven by the first synchronous belt to continue to rotate 90°. The cam rotation angle passes through the far rest angle, the return motion angle, and the near rest angle. Since the return motion angle is 0°, the pressure plate (27) returns sharply under the spring force of the spring (25), and the sliding cutter (30) quickly returns upward. After the return, the state of the sliding cutter (30) is consistent with step 1); 5) The second motor (15) in the cutter steering drive assembly is started, and its output shaft rotates 90 degrees, driving the steering gear box through the second synchronous belt transmission, and each gear in the steering gear box rotates 90 degrees synchronously, thereby driving the cutter shaft (29) to rotate 90 degrees, and the side surface of the sliding cutter (30) changes from being parallel to the longitudinal seedling feeding direction to being perpendicular to it; 6) The output shaft of the first motor (23) continues to rotate 90°, and the cam (11) is driven to rotate 90° through the first synchronous belt. The cam rotation angle passes through the near rest angle, the thrust motion angle, and the far rest angle. This process is the process of pressing the pressing plate (27). The pressing plate (27) presses the knife shaft (29). When the spring (25) is fully compressed, the transverse cutting of the longitudinal strip is completed once. 7) The output shaft of the first motor (23) continues to rotate 90°, and the cam (11) is driven to continue to rotate 90° through the first synchronous belt. The cam rotation angle passes through the far rest angle, the return motion angle, and the near rest angle. Since the return motion angle is 0°, the pressure plate (27) returns sharply under the spring force of the spring (25), and the sliding cutter (30) quickly returns to its original position upward; then, the output shaft of the second motor (15) rotates 90°, and the side surface of the sliding cutter (30) changes from a state perpendicular to the longitudinal seedling feeding direction to a state parallel to the longitudinal seedling feeding direction. At this time, the working state of the sliding cutter (30) is consistent with step 1).

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