A rice blanket seedling throwing machine cutting device and its cutting method

Abstract

The present invention relates to a cutting device and a cutting method for a rice blanket seedling throwing machine, which includes a bracket spanning across the seedling box. A cutter mechanism and a driving mechanism are provided on the bracket. The driving mechanism is used to drive the cutter mechanism to act, so as to cut the seedling blanket longitudinally conveyed from the upper part to the lower part of the seedling box. The cutter mechanism is provided with several groups and is arranged horizontally on the bracket in a manner that can move up and down and rotate. The driving mechanism includes a cutter downward pressure driving component and a cutter turning driving component. The driving ends of the cutter downward pressure driving component and the cutter turning driving component are both connected to several groups of cutter mechanisms. All cutter mechanisms can simultaneously move up and down under the drive of the cutter downward pressure driving component to longitudinally cut the seedling blanket, and can also simultaneously turn 90° under the drive of the cutter turning driving component to horizontally cut the longitudinal cut strips of the seedling blanket. The present invention has the advantages of simple and compact structure, high cutting efficiency, good integrity of the seedling block soil bowl, and small root system damage.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and particularly relates to a rice mat-seedling throwing machine cutting device and a cutting method thereof. Background Art

[0002] There are mainly two ways of mechanized transplanting of rice: machine transplanting and machine throwing of seedlings. The seedlings used for machine transplanting are mat seedlings, which have the advantages of mature technology, high efficiency and low investment. However, machine transplanting of mat seedlings has many limitations, which restrict the full play of the yield potential of rice: when machine transplanting mat seedlings, the seedling claws break the mat root system when picking seedlings, causing serious damage to the root system of the seedlings, and there is a slow seedling stage of 5-7 days after transplanting; when the seedling claws pick seedlings, they tear the seedling mat, and the root-wrapping substrate is dragged apart, resulting in the exposure of the root system. When transplanting, the soil bowl of the seedling block is incomplete and irregular, and the root growth substrate and nutrients cannot be completely retained, which is not conducive to slow seedling after transplanting; the transplanting depth is large, generally 2-4 cm, which affects the slow seedling and regreening of the seedlings and their early and rapid growth, and there are many high-order tillers, reducing the ear formation rate. Machine throwing of rice seedlings is a high-yield and high-quality cultivation agronomic technique. The seedlings used are pot seedlings. Compared with machine transplanting of mat seedlings, the seedlings are independent pots, there is no planting injury during transplanting, the soil bowl of the seedling block is complete, and the throwing depth is shallow. It has the characteristics of fast regreening, many effective tillers at low nodes, no extension of the rice growth period, and significant yield increase effect. However, the technical requirements for raising pot seedlings are high, especially the price of seedling trays is relatively expensive, resulting in high seedling raising costs and a large demand for labor; the throwing machines mainly rely on imported Japanese technology, which are expensive and have complex structures. All of the above greatly increase the production cost of machine throwing of seedlings, resulting in low overall efficiency.

[0003] Using rice mat seedlings for throwing is an effective way to solve the problems existing in machine transplanting of rice mat seedlings and machine throwing of pot seedlings, combining the advantages of mature technology, high efficiency and low investment of mat seedling raising technology and the high-quality agronomic technology advantages of complete soil bowl, shallow planting and no root damage of pot seedling throwing. Before machine throwing of mat seedlings, the seedling mat must first be divided into individual and complete seedling blocks. Therefore, the cutting device is the core working component of a rice mat-seedling throwing machine, which determines the quality of machine throwing of seedlings. At present, the cutting of mat-seedling throwing machines requires multi-stage mechanism cutting, which not only has a complex structure, but also has a large cutting resistance and low efficiency, and the cutting accuracy cannot be guaranteed, resulting in poor integrity of the soil bowl of the seedling block and large root damage. All of the above problems reduce the quality of throwing seedlings and are not conducive to giving full play to the potential of increasing production and efficiency of machine throwing of rice mat seedlings.

[0004] For example, the invention patent application with the application number 202311235714.6 proposed a "device for cutting and throwing rice pot-seedling mat-shaped seedlings", which includes mechanisms such as a seedling pushing mechanism, a strip cutting mechanism, a block cutting mechanism, and a seedling dropping mechanism. Along the conveying direction, there are a strip cutting station, a block cutting station, and a seedling dropping station in sequence. The strip cutting mechanism is arranged at the strip cutting station and is used to cut the rice pot-seedling mat-shaped seedlings into seedling strips. The block cutting mechanism is arranged at the block cutting station and is used to cut the seedling strips into block-shaped seedlings. The block-shaped seedlings are thrown at the seedling dropping mechanism. The strip cutting mechanism of this device adopts the form of a disc cutter. First, the cutting resistance of this method is large. Second, the disc cutter surface is always in contact with the side of the seedling strip. The seedling mat generally has a high moisture content, and a large adsorption force and friction force are generated between the cutter surface and the side of the seedling strip, forcing longitudinal seedling feeding. The seedling mat is prone to arching and stacking, and the motor is overloaded, and the cut seedling strip is also lifted and swung. And after strip cutting, the block cutting mechanism is still required to perform transverse cutting. The cutter of the block cutting structure cuts all the seedling strips transversely from the lower part of the seedling-carrying table, and a seedling pressing rod needs to be adapted to each seedling strip. Its disadvantages are: it increases the complexity of the structure, and a large and fast penetration cutting force is required, the device vibrates greatly, and the cutting efficiency is low.

[0005] Chinese invention patent CN 117099541B proposed a "device and method for high-speed cutting and orderly throwing of rice mat-shaped seedlings", which includes a longitudinal seedling feeding mechanism, a longitudinal cutting knife mechanism, a transverse cutting knife mechanism, a planting mechanism, etc. The integrity of the soil bowl of the thrown seedling block is good, and it has the characteristics of high speed, shallow planting, small planting injury, and no regreening period. However, the longitudinal strip cutting and transverse block cutting of this throwing machine are completed by two sets of mechanisms, increasing the complexity of the whole machine; the cutter of the transverse cutting knife mechanism cuts a single seedling strip transversely from the lower part of the seedling box, which not only requires a high-speed large penetration cutting force, the device vibrates greatly, and the cutting efficiency is low, but also it is difficult to ensure the transverse cutting accuracy. Summary of the Invention

[0006] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a cutting device and a cutting method for a rice mat-shaped seedling throwing machine with a simple structure, small cutting resistance, high efficiency, good integrity of the soil bowl of the cut seedling block, and small root damage.

[0007] To solve the above technical problems, the technical solution provided by the present invention is as follows:

[0008] A rice blanket seedling throwing machine cutting device is installed at the lower part of the seedling box of the throwing machine, including a bracket spanning the seedling box. A cutter mechanism and a driving mechanism are provided on the bracket. The driving mechanism is used to drive the cutter mechanism to act, so as to cut the seedling blanket longitudinally conveyed from the upper part to the lower part of the seedling box. The cutter mechanism has several groups and is arranged horizontally on the bracket in a way that can move up and down and rotate. The driving mechanism includes a cutter pressing-down driving component and a cutter turning driving component. The driving ends of the cutter pressing-down driving component and the cutter turning driving component are both connected to the several groups of cutter mechanisms. All cutter mechanisms can simultaneously move up and down under the drive of the cutter pressing-down driving component to longitudinally cut the seedling blanket, and all cutter mechanisms can also simultaneously turn 90° under the drive of the cutter turning driving component to horizontally cut the longitudinal cut strips of the seedling blanket.

[0009] As a further improvement of the above technical solution:

[0010] Further, the cutting device further 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. Their widths are the same and their upper surfaces are flush. The lower end of the lower seedling box bottom plate is in sliding contact with the slide rail of the 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. Adjacent two lower seedling box bottom plates are fixedly connected into a whole through the side plates. The bottom end of the bracket is installed on the upper end surface of the side plate. The cutter mechanisms located above the same lower seedling box bottom plate form a cutting unit, and each cutting unit is a cut of the seedling blanket conveyed onto the lower seedling box bottom plate.

[0011] Further, the bracket includes an upper crossbeam bracket, an upper crossbeam bracket bottom plate, a lower fixed crossbeam, and an upper fixed crossbeam. The upper crossbeam bracket and the upper crossbeam bracket bottom plate are horizontally arranged and span the seedling box. The upper crossbeam bracket and the upper crossbeam bracket bottom plate are connected by several evenly spaced crossbeam bracket side plates and form squares corresponding to each cutting unit. The lower ends of the crossbeam bracket side plates are respectively installed on the upper end surface of a side plate through a lower bracket; the lower fixed crossbeam and the upper fixed crossbeam both span the back of the seedling box. The lower fixed crossbeam is located below the upper fixed crossbeam and is connected to each lower seedling box bottom plate. The upper side of the upper fixed crossbeam is connected to each upper seedling box bottom plate, and the lower side is connected to each lower seedling box bottom plate; several through holes are provided on the upper crossbeam bracket bottom plate, and the cutter mechanism is vertically penetrated through the through holes, with the upper end located in the square and the lower end located above the seedling blanket.

[0012] Further, the cutting knife mechanism includes a vertically arranged knife shaft and a sliding cutting knife. The knife shaft passes through the through hole on the bottom plate of the upper crossbeam bracket. A compression piece is provided at the top of the knife shaft and is located within the grid; the cross-section of the sliding cutting knife is rectangular. The upper end of the sliding cutting knife is fixedly connected to the lower end of the knife shaft by bolts. A sliding cutting edge is provided at the lower end of the sliding cutting knife and the side edges are not sharpened. The height of the sliding cutting knife is greater than the thickness of the seedling blanket. In the initial state, the sliding cutting edge of the sliding cutting knife is parallel to the longitudinal seedling feeding direction, and the tip is within 10 mm from the upper surface of the seedling blanket.

[0013] Further, longitudinal knife grooves corresponding one-to-one to the sliding cutting knives in the same cutting block unit and a transverse knife groove passing through the central positions of all the longitudinal knife grooves are provided at the lower ends of the intermediate plates 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 distances between adjacent longitudinal knife grooves are equal and are equal to the width of the finally cut seedling strip. The widths of the longitudinal knife grooves and the transverse knife groove are slightly larger than the thickness of the sliding cutting knife. The length of the longitudinal knife groove, the longitudinal seedling feeding distance each time, and the width of the sliding cutting knife are the same.

[0014] Further, the cutting knife downward pressing drive assembly includes a first drive shaft, a first synchronous belt drive, a first motor, a cam, and a pressure plate. The first drive shaft horizontally passes through the through holes opened on the side plates of each upper crossbeam bracket. The first motor is installed on one end of the lower fixed crossbeam and the upper fixed crossbeam through a motor bracket. The output shaft of the first motor is connected to one end of the first drive shaft through the first synchronous belt drive. A cam is provided at the middle of the first drive shaft in each cutting block unit. The cam has a near rest angle, a forward stroke motion angle, a far rest angle, and a return stroke motion angle every 180-degree rotation angle, wherein the return stroke motion angle is 0°, which is a quick return concave part; the pressure plate is located below the cam and horizontally passes through the pressure plate limiting grooves opened 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 a quick return motion. The lower surface of the pressure plate contacts the upper end surface of the compression piece at the top of the knife shaft. A spring is sleeved on each knife shaft. The upper end of the spring contacts the lower end surface of the compression piece, and the lower end of the spring contacts the cutting knife steering drive assembly; every time the cam rotates 180°, the sliding cutting knife can achieve one downward and upward movement.

[0015] Further, the cutter turning drive assembly includes a second motor, a second synchronous belt drive, a second drive shaft, a plurality of bevel gear pairs, and a turning gearbox. The second drive shaft spans across the seedling box and horizontally passes through through holes formed in each lower support. The second motor is mounted on the other ends of the lower fixed cross beam and the upper fixed cross beam through a motor bracket. The output shaft of the second motor is connected to one end of the second drive shaft through the second synchronous belt drive. The turning of the sliding cutter of each cutting unit is driven by a turning gearbox. Each turning gearbox is horizontally mounted on the bottom plate of the upper cross beam bracket. The upper end surface of the turning gearbox contacts the lower ends of the respective springs. Each cutting unit is provided with a set of bevel gear pairs. The input ends of the bevel gear pairs are mounted on the second drive shaft. The output ends of the bevel gear pairs are connected to the input ends of the corresponding turning gearboxes through a third drive shaft that passes upward through the bottom plate of the upper cross beam bracket.

[0016] Further, the turning gearbox includes an L-shaped housing. A power input gear, a transition gear, and a plurality of meshing turning gears arranged in an L-shape are horizontally mounted in the housing. The plurality of turning gears are arranged horizontally and correspond one by one to the knife shafts in each cutting unit. The power input gear is mounted on the upper end of the third drive shaft. One side of the transition gear meshes with the power input gear longitudinally, and the other side meshes with the adjacent turning gear horizontally for transmission. The knife shaft passes through the turning gearbox from top to bottom and is inserted into the central hole of the corresponding turning gear to be driven to turn by it, and can move up and down. The turning gear drives each knife shaft to rotate to realize the turning of the sliding cutter. The turning directions between adjacent sliding cutters are opposite. Every time the bevel gear pair rotates 90°, the side surface of the sliding cutter can achieve a commutation between being parallel and perpendicular to the longitudinal seedling feeding direction.

[0017] Further, the L-shaped housing includes an upper housing and a lower housing. Corresponding through holes are provided on both the upper housing and the lower housing. The upper end of the knife shaft passes out through the through hole of the upper housing, and the lower end passes out through the through holes of the lower housing and the bottom plate of the upper cross beam bracket and is limited by a knife shaft limit sleeve.

[0018] Further, the knife shaft, the first drive shaft, the second drive shaft, and the third drive shaft are all hexagonal shafts. The central holes of the power input gear and the turning gears are all hexagonal holes. The transmission ratios of the first synchronous belt drive, the second synchronous belt drive, and each gear pair are all 1:1.

[0019] As a general inventive concept, the present invention also provides a method for cutting the blanket-shaped seedlings using the above-mentioned blanket-shaped seedling throwing machine cutting device for rice, including the following steps:

[0020] 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 without contacting it, and the knife side surface is parallel to the longitudinal seedling feeding direction.

[0021] 2) The seedling box moves horizontally to one extreme position of the slide rail, and the longitudinal seedling feeding belt of the seedling box feeds the seedling blanket placed on the upper seedling box bottom plate longitudinally once to the lower seedling box bottom plate;

[0022] 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°. The cam is driven to rotate 90° through the first synchronous belt drive. The cam rotates through the near rest angle, the forward stroke angle, and the far rest angle. This process is the process of pressing down the pressure plate. When the pressure plate presses down the cutter shaft and the spring is completely compressed, one longitudinal strip cutting is completed;

[0023] 4) The output shaft of the first motor continues to rotate 90°, and the cam is driven to continue rotating 90° through the first synchronous belt drive. The cam rotates through the far rest angle, the return stroke angle, and the near rest angle. Since the return stroke angle is 0°, under the spring force of the spring, the pressure plate quickly returns, and the sliding cutter quickly resets upward. After resetting, the state of the sliding cutter is the same as that in step 1);

[0024] 5) The second motor in the cutter rotation drive assembly starts, and its output shaft rotates 90°. The steering gearbox is driven through the second synchronous belt drive. All the gears in the steering gearbox rotate synchronously by 90°, thereby driving the cutter shaft to rotate 90°. The side of the sliding cutter changes from a state parallel to the longitudinal seedling feeding direction to a state perpendicular to it;

[0025] 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 drive. The cam rotates through the near rest angle, the forward stroke angle, and the far rest angle. This process is the process of pressing down the pressure plate. When the pressure plate presses down the cutter shaft and the spring is completely compressed, one transverse cutting of the longitudinal strip is completed;

[0026] 7) The output shaft of the first motor continues to rotate 90°, and the cam is driven to continue rotating 90° through the first synchronous belt drive. The cam rotates through the far rest angle, the return stroke angle, and the near rest angle. Since the return stroke angle is 0°, under the spring force of the spring, the pressure plate quickly returns, and the sliding cutter quickly resets upward; then, the output shaft of the second motor rotates 90°, and the side of the sliding cutter changes from a state perpendicular to the longitudinal seedling feeding direction to a parallel state. At this time, the working state of the sliding cutter is the same as that in step 1).

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The cutting device and method for the rice mat-seedling throwing machine of the present invention are simple in structure, reasonable and compact. When the seedling mat passes under the cutting device, it is first longitudinally cut into strips and then transversely cut into pieces. The longitudinal cutting into strips and the transverse cutting into pieces are completed by a set of cutting knife mechanisms, with intermittent cutting. During longitudinal seedling feeding, the sliding cutting knife has no contact with the seedling mat, and there is no resistance during longitudinal seedling feeding. Not only is the cutting resistance small and the efficiency high, but also the integrity of the soil pots of the cut seedling blocks is good and the root system damage is small, enabling the mat-seedling cutting and throwing to have the technical advantages of early and rapid growth of pot-seedling cultivation and fully exerting the potential of rice yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front three-dimensional structural schematic diagram when the cutting device of the present invention is applied.

[0030] Figure 2 It is Figure 1 The enlarged front structural schematic diagram of the cutting device at part A of

[0031] Figure 3 It is Figure 1 The enlarged back structural schematic diagram of the cutting device at part A of

[0032] Figure 4 It is Figure 2 The enlarged structural schematic diagram of the cutting unit at part B of

[0033] Figure 5 It is Figure 3 The enlarged structural schematic diagram of the cutting unit at part C of

[0034] Figure 6 It is a back three-dimensional structural schematic diagram when the cutting device of the present invention is applied.

[0035] Figure 7 It is a three-dimensional structural schematic diagram of the steering gearbox in the cutting device of the present invention.

[0036] Figure 8 It is an internal gear drive three-dimensional structural schematic diagram of the steering gearbox in the present invention.

[0037] Figure 9 It is a three-dimensional structural schematic diagram of the crossbeam support in the cutting device of the present invention.

[0038] Figure 10 It is a three-dimensional structural schematic diagram of the lower support in the cutting device of the present invention.

[0039] Figure 11 It is the assembly structural schematic of the knife shaft and the sliding cutting knife in the present invention Figure 1 (The form of the cutting edge line is inclined downward on one side)

[0040] Figure 12 It is the assembly structural schematic of the knife shaft and the sliding cutting knife in the present invention Figure 2(The edge line form slopes downward symmetrically from both sides).

[0041] Figure 13 It is a front three-dimensional structural schematic diagram of the bottom plate of the seedling dropping box in the present invention.

[0042] Figure 14 It is a back three-dimensional structural schematic diagram of the bottom plate of the seedling dropping box in the present invention.

[0043] Figure 15 It is a schematic diagram of the state when the seedling box slides to the leftmost along the slide rail in the present invention.

[0044] Figure 16 It is a schematic diagram of the state when the seedling box slides to the rightmost along the slide rail in the present invention.

[0045] Figure 17 It is a partial three-dimensional structural schematic diagram of working step 1) of the method of the present invention.

[0046] Figure 18 It is a partial three-dimensional structural schematic diagram of working step 2) of the method of the present invention.

[0047] Figure 19 It is a partial three-dimensional structural schematic diagram of working step 3) of the method of the present invention.

[0048] Figure 20 It is a partial three-dimensional structural schematic diagram of working step 4) of the method of the present invention.

[0049] Figure 21 It is a partial three-dimensional structural schematic diagram of working step 5) of the method of the present invention.

[0050] Figure 22 It is a partial three-dimensional structural schematic diagram of working step 6) of the method of the present invention.

[0051] Figure 23 It is a partial three-dimensional structural schematic diagram of working step 7) of the method of the present invention.

[0052] Legend:

[0053] 1. Upper seedling box bottom plate; 2. Upper support of seedling pressing rod; 3. Seedling pressing rod; 4. Lower support of seedling pressing rod; 5. Seedling guiding rod; 6. Slide rail; 7. Upper crossbeam support; 8. First driving shaft; 9. First driven synchronous pulley; 10. First synchronous belt; 11. Cam; 12. Second driven synchronous pulley; 13. Second synchronous belt; 14. Second driving synchronous pulley; 15. Second motor; 16. Lower support; 17. Second driving shaft; 18. Lower fixed crossbeam; 19. Upper fixed crossbeam; 20. Driving bevel gear; 21. Driven bevel gear; 22. Lower seedling box bottom plate; 23. First motor; 24. First driving synchronous pulley; 25. Spring; 26. Upper housing; 27. Pressure plate; 28. Lower housing; 29. Knife shaft; 30. Sliding cutter; 31. Motor support; 32. Longitudinal seedling feeding belt; 33. Third driving shaft; 34. Power input gear; 35. Intermediate gear; 36. Steering gear; 37. Knife shaft limit sleeve; 38. Side plate of upper crossbeam support; 39. Bottom plate of upper crossbeam support; 40. Pressure plate limit groove; 41. Longitudinal knife groove; 42. Side plate; 43. Transverse knife groove; 44. Seedling blanket; 45. Seedling block soil bowl. Detailed implementation mode

[0054] The following further elaborates on the invention in conjunction with the accompanying drawings and specific embodiments.

[0055] Embodiment of the cutting device:

[0056] As Figure 1 - Figure 23 shown, the cutting device of the rice blanket seedling throwing machine in this embodiment is installed at the lower part of the seedling box of the throwing machine. The cutting device includes a bracket spanning the seedling box, a cutter mechanism, and a driving mechanism. There are several groups of cutter mechanisms, which are arranged horizontally on the bracket in a manner that can move up and down and rotate. The driving mechanism includes a cutter pressing-down driving component and a cutter steering driving component. The driving ends of the cutter pressing-down driving component and the cutter steering driving component are both connected to several groups of cutter mechanisms. All cutter mechanisms can simultaneously move up and down under the drive of the cutter pressing-down driving component to longitudinally cut the seedling blanket 44, and all cutter mechanisms can also simultaneously turn 90° under the drive of the cutter steering driving component to transversely cut the longitudinal cut strips of the seedling blanket 44. The structure of the present invention is simple, reasonably compact. When the seedling blanket passes under the cutting device, it is first longitudinally cut and then transversely cut. The longitudinal cutting and transverse cutting are completed by a set of cutter mechanisms, with intermittent cutting, improving both the cutting efficiency and cutting quality.

[0057] The seedling box is inclined, and the included angle with the horizontal plane is 50° - 70°. It includes several upper seedling box bottom plates 1, seedling pressing rods 3, several longitudinal seedling feeding belts 32 and other mechanisms. The seedling pressing rods 3 are fixed on the seedling box through the upper supports 2 of the seedling pressing rods and the lower supports 4 of the seedling pressing rods. The seedling box is a prior art and will not be elaborated in detail here.

[0058] In this embodiment, the cutting 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 widths of the two are the same and their 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 throwing seedling machine. When the seedling box feeds seedlings horizontally, it can slide left and right on the slide rail 6. Guide seedling rods 5 are fixedly arranged on the slide rail 6 at equal intervals, and each lower seedling box bottom plate 22 corresponds to one guide seedling 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 each time is the same as the longitudinal cutting strip distance of the cutting device. The relationship between the horizontal and longitudinal seedling feeding of the seedling box is as follows: when the seedling box feeds seedlings horizontally and moves to one extreme position of the slide rail 6, the longitudinal seedling feeding belt 32 performs a longitudinal seedling feeding. Then, when the seedling box feeds seedlings horizontally and reaches the other extreme position of the slide rail 6, the longitudinal seedling feeding belt 32 performs a longitudinal seedling feeding, and this reciprocating motion is carried out in this way.

[0059] In this embodiment, the lower seedling box bottom plate 22 is U-shaped, including a middle plate and side plates 42 connected to both sides of the middle plate. Adjacent lower seedling box bottom plates 22 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 into a whole. The cutter mechanism located above the same lower seedling box bottom plate 22 constitutes a cutting unit, and each cutting unit is a cutting of the seedling blanket 44 conveyed onto the lower seedling box bottom plate 22.

[0060] In this embodiment, the bracket includes an upper cross beam bracket 7, an upper cross beam bracket bottom plate 39, a lower fixed cross beam 18, and an upper fixed cross beam 19. The upper cross beam bracket 7 and the upper cross beam bracket bottom plate 39 are horizontally arranged and span the seedling box. The upper cross beam bracket 7 and the upper cross beam bracket bottom plate 39 are connected by a plurality of equally spaced upper cross beam bracket side plates 38 and form a plurality of squares, and each square corresponds to a cutting unit. The lower ends of the upper cross beam bracket side plates 38 are fixedly installed on the upper end of a lower bracket 16, and the lower end of the lower bracket 16 is fixedly installed on the upper end surface of the side plate 42. Both the lower fixed cross beam 18 and the upper fixed cross beam 19 span the back of the seedling box. The lower fixed cross beam 18 is located below the upper fixed cross beam 19 and is connected to each lower seedling box bottom plate 22, playing a role in strengthening the connection strength between the lower seedling box bottom plates 22. The upper side of the upper fixed cross beam 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 cross beam bracket bottom plate 39, and the cutter mechanism is vertically penetrated through the through holes, with the upper end located within the square and the lower end located above the seedling blanket 44.

[0061] In this embodiment, the cutter mechanism includes a vertically arranged cutter shaft 29 and a sliding cutter 30. The cutter shaft 29 passes through a through hole in the bottom plate 39 of the upper crossbeam support. A compression piece is provided at the top of the cutter shaft 29 and is located within the grid. The cross-section of the sliding cutter 30 is rectangular, and the cutter shaft 29 is a hexagonal shaft. The upper end of the sliding cutter 30 is fixedly connected to the lower end of the cutter shaft 29 by bolts. A sliding cutting edge is provided at the lower end of the sliding cutter 30, and the form of its edge line is not restricted. The direction of its edge line can be inclined downward from one side or symmetrically inclined downward from both sides. To prevent the sliding cutter 30 from damaging the rice stems and leaves, its side edges are not sharpened. In the initial state, the sliding cutting edge of the sliding cutter 30 is parallel to the longitudinal seedling feeding direction, and the tip of the cutter is within 10 mm from the upper surface of the seedling blanket 44.

[0062] In this embodiment, longitudinal knife grooves 41 corresponding one by one to the sliding cutters 30 in the same cutting block unit and a transverse knife groove 43 passing through the central positions of the longitudinal knife grooves 41 are provided at the lower ends of the middle plates of each lower seedling box bottom plate 22. 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 distances between adjacent longitudinal knife grooves 41 are equal and are equal to the width of the last cut seedling strip. The widths of the longitudinal knife grooves 41 and the transverse knife groove 43 are 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 the same. The height of the sliding cutter 30 is greater than the thickness of the seedling blanket 44. When it works, it can completely cut through the seedling blanket 44 and the cutting edge can enter the back of the lower seedling box bottom plate 22 through the knife groove.

[0063] 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 pressing plate 27. The first synchronous belt drive includes a first driven synchronous belt pulley 9, a first synchronous belt 10, and a first driving synchronous belt pulley 24. The transmission ratio between the first driven synchronous belt pulley 9 and the first driving synchronous belt pulley 24 is 1:1. The first drive shaft 8 is a hexagonal shaft, which horizontally passes through the through holes opened on the side plates 38 of each upper cross beam support. The first motor 23 is installed at one end of the lower fixed cross beam 18 and the upper fixed cross beam 19 through a motor bracket 31. The first driving synchronous belt pulley 24 is connected to the output shaft of the first motor 23, and the first driven synchronous belt 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 drive shaft 8. The cam 11 is provided with a near rest angle, a stroke motion angle, a far rest angle, and a return motion angle at every 180-degree rotation 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 horizontally passes through the pressing plate limit groove 40 opened on the side plates 38 of each upper cross beam support. The pressing plate limit groove 40 can limit the up and down movement of the pressing plate 27. 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 piece at the top of the cutter shaft 29. A spring 25 is sleeved on each cutter shaft 29. The upper end of the spring 25 contacts the lower end surface of the compression piece, and the lower end of the spring 25 contacts the cutter turning drive assembly.

[0064] The working process of the cutter pressing drive assembly is as follows:

[0065] The first motor 23 drives the first drive shaft 8 through the first synchronous belt drive. The first drive shaft 8 drives the cam 11 of each cutting unit to rotate. When the contour curve of the stroke motion angle 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 cutter shaft 29, and the compression piece of the cutter shaft 29 presses down the spring 25, thereby realizing the downward movement of the sliding cutter 30. 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 quickly returns under the action of the spring force, thereby realizing the rapid upward reset of the sliding cutter 30. At this time, the tip of the cutter is within 10 mm from the upper surface of the seedling blanket. Every half turn (180°) of the cam 11 realizes one downward and upward movement of the sliding cutter 30.

[0066] In this embodiment, the cutter turning 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 turning gearbox. The second synchronous belt drive includes a second driven synchronous belt pulley 12, a second synchronous belt 13, and a second driving synchronous belt pulley 14, and the transmission ratio between the second driven synchronous belt pulley 12 and the second driving synchronous belt pulley 14 is 1:1. The second drive shaft 17 is a hexagonal shaft that spans the seedling box and horizontally passes through through holes formed in each lower bracket 16. The second motor 15 is mounted on the other ends of the lower fixed cross beam 18 and the upper fixed cross beam 19 through a 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 turning of the sliding cutter 30 of each cutting unit is driven by a turning gearbox. Each turning gearbox is horizontally mounted on the bottom plate 39 of the upper beam bracket, and the upper end surface of the turning gearbox contacts the lower ends of the respective springs 25. The bevel gear pair includes a driving bevel gear 20 and a driven bevel gear 21. Each cutting unit is provided with a set of driving bevel gear 20 and driven bevel gear 21, and the transmission ratio between the two is 1:1. The axis of the driving 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 upward through the bottom plate 39 of the upper beam bracket and is connected to the input end of the corresponding turning gearbox.

[0067] In this embodiment, the turning gearbox is horizontally disposed in an L shape and includes an L-shaped housing. Horizontally mounted in the housing are a power input gear 34, a transition gear 35, and a plurality of turning gears 36 arranged in an L shape. The plurality of turning gears 36 are arranged in a transverse direction and correspond one by one to the cutter shafts 29 in each cutting unit. Hexagonal holes are provided at the centers of both the power input gear 34 and the turning gears 36. 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 longitudinally, and the other side meshes with the adjacent turning gear 36 transversely for transmission. The transmission ratio between each pair of gears is 1:1. The cutter shaft 29 penetrates the turning gearbox from top to bottom and is inserted into the central hole of the corresponding turning gear 36 to be driven to turn, and can move up and down.

[0068] The working process of the cutter turning drive assembly is as follows:

[0069] The second motor 15 drives the second drive shaft 17 through a second synchronous belt drive. The second drive shaft 17 drives the driving bevel gear 20 of each cutting unit to rotate. The driving bevel gear 20 drives its corresponding driven bevel gear 21. The driven bevel gear 21 drives the third drive shaft 33 to rotate. The power input gear 34 is driven by the third drive shaft 33 and rotates synchronously, thereby realizing the meshing drive of each steering gear 36 in the steering gearbox. Each steering gear 36 drives a cutter shaft 29 to rotate, thereby realizing the steering of the sliding cutter 30. The steering directions between adjacent sliding cutters 30 are opposite. Every time the driving bevel gear 20 rotates 90°, the side of the sliding cutter 30 can achieve a commutation parallel and perpendicular to the longitudinal seedling feeding direction once.

[0070] In this embodiment, the L-shaped housing includes an upper housing 26 and a lower housing 28. Corresponding cutter shaft through holes are provided on both the upper housing 26 and the lower housing 28. The upper end of the cutter shaft 29 passes through the through hole of the upper housing 26, and the lower end passes through the through holes of the lower housing 28 and the upper cross beam support bottom plate 39 and is limited by the cutter shaft limit sleeve 37.

[0071] The working principle of the cutting device of the present invention is as follows: Place the seedling blanket 44 above the seedling box on the upper seedling box bottom plate 1. The seedling pressing rod 3 presses the seedling blanket 44. 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 presses down from above the seedling blanket under the drive of the cutter pressing drive assembly to longitudinally cut the strip, then the sliding cutter 30 retracts upward above the seedling blanket and rotates 90° under the drive of the cutter steering drive assembly, and then presses down under the drive of the cutter pressing drive assembly to laterally cut the block, and then retracts upward above the seedling blanket. The cut seedling blocks reach the seedling taking port under the precise lateral transfer of the seedling box and are thrown by the throwing claws through the seedling guiding rod 5 to complete the seedling throwing.

[0072] Embodiment of the cutting method:

[0073] The present invention also provides a method for cutting the blanket-shaped seedlings by using the cutting device of the above-mentioned rice blanket-shaped seedling throwing machine.

[0074] Taking the longitudinal cutting of 14 strips of 9-inch ordinary blanket-shaped seedlings as an example for detailed description, each cutting unit has 13 sliding cutters, and the cutting edge line of the sliding cutters adopts a form that is symmetrically inclined downward on both sides. The seedling blanket 44 is a simplified model, only showing the root blanket formed by the roots and the nutrient soil tray, without showing the upper stems and leaves.

[0075] When placing the first seedling blanket 44 on each upper seedling box bottom plate 1, the seedling throwing machine idles in place for a period of time until the longitudinal seedling feeding belt 32 continuously and precisely conveys 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 longitudinally cut into strips and then laterally cut into blocks. The specific steps are as follows:

[0076] 1) AsFigure 17 As shown, the cutting device has completed cutting in three horizontal rows, with 14 seedling blocks in each row, the soil pots 45. Figure 17 Taking the position of the sliding cutter as the initial position, at this time, the contour curve of the near rest angle of the cam 11 contacts the upper surface of the pressure plate 27, the spring 25 is in the reset state, the sliding cutter 30 is located directly above the seedling blanket 44 without contacting it, the tip of the cutter is within 10 mm from the upper surface of the seedling blanket, and the side of the cutter is parallel to the longitudinal seedling feeding direction.

[0077] 2) As Figure 18 shown, the seedling box moves horizontally to one extreme position of the slide rail 6, and the longitudinal seedling feeding belt 32 performs one-time longitudinal seedling feeding on the seedling blanket 44 placed on the upper seedling box bottom plate 1. The longitudinal seedling feeding distance is the same as the width of the sliding cutter. When the longitudinal seedling feeding belt is working, the sliding cutter is above the seedling blanket and does not contact the seedling blanket, reducing the longitudinal seedling feeding resistance. The side of the cutter is parallel to the longitudinal seedling feeding direction, playing a role in guiding the seedlings and guiding the seedlings into the channels formed between adjacent sliding cutters, reducing the damage to the stems and leaves above the seedling blanket during the operation of the cutter.

[0078] 3) As Figure 19 shown, at the moment when the longitudinal seedling feeding belt 32 completes one-time longitudinal seedling feeding, the first motor 23 in the cutter pressing drive assembly starts, and its output shaft rotates 90°, driving the cam 11 to rotate 90° through the first synchronous belt drive. The cam rotates through the near rest angle, the stroke motion angle, and the far rest angle. This process is the process of pressing down the pressure plate 27. When the pressure plate 27 presses down the cutter shaft 29 and the spring 25 is completely compressed, one-time longitudinal strip cutting is completed.

[0079] 4) As Figure 20 shown, the output shaft of the first motor 23 continues to rotate 90°, driving the cam 11 to continue rotating 90° through the first synchronous belt drive. The cam rotates through the far rest angle, the return stroke motion angle, and the near rest angle. Since the return stroke motion angle is 0°, under the spring force of the spring 25, the pressure plate 27 quickly returns, and the sliding cutter 30 quickly resets upward. After resetting, the state of the sliding cutter 30 is the same as that in step 1).

[0080] 5) As Figure 21 shown, the second motor 15 in the cutter rotation drive assembly starts, and its output shaft rotates 90°, driving the rotation gearbox through the second synchronous belt drive. All the gears in the rotation gearbox rotate synchronously by 90°, thereby driving the cutter shaft 29 to rotate 90°, and the side of the sliding cutter 30 changes from the state parallel to the longitudinal seedling feeding direction to the state perpendicular to it.

[0081] 6) As Figure 22As shown, the output shaft of the first motor 23 continues to rotate 90°, driving the cam 11 to rotate 90° through the first synchronous belt drive. The cam rotates through the near dwell angle, the lift motion angle, and the far dwell angle. This process is the process of pressing down the pressing plate 27. When the pressing plate 27 presses down the cutter shaft 29 and the spring 25 is completely compressed, a transverse cutting of the above longitudinal strip is completed once.

[0082] 7) As Figure 23 shown, the output shaft of the first motor 23 continues to rotate 90°, driving the cam 11 to rotate 90° through the first synchronous belt drive. The cam rotates through the far dwell angle, the return motion angle, and the near dwell angle. Since the return motion angle is 0°, under the spring force of the spring 25, the pressing plate 27 quickly returns, and the sliding cutter 30 quickly resets upward. Then, the output shaft of the second motor 15 rotates 90°, and the side of the sliding cutter 30 changes from a state perpendicular to the longitudinal seedling feeding direction to a parallel state. At this time, the working state of the sliding cutter 30 is the same as that in step 1).

[0083] When the seedling box moves horizontally to the other extreme position of the slide rail 6, repeat steps 2) to 7), and so on.

[0084] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to an equivalent embodiment with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiment based on the technical essence 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 a rice blanket seedling throwing machine seedling box, the seedling box comprising a plurality of upper seedling box bottom plates (1) and corresponding fixed lower seedling box bottom plates (22), the cutting device comprising a bracket spanning the seedling box, the bracket being provided with a plurality of groups of cutting mechanisms and a driving mechanism, the driving mechanism being used to drive the cutting mechanism to operate so as to cut the rice blanket (44) longitudinally transported from the upper part of the seedling box to the lower part, characterized in that: A plurality of groups of the cutting mechanisms are arranged in a transverse arrangement on the support in a manner that they can move up and down and can rotate. The cutting mechanisms located above the same bottom plate (22) of the lower seedling box constitute a cutting block unit. 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 groups of cutting mechanisms. All the cutting 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 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); 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 connected to a plurality of upper crossbeam support side plates (38) at a distance of 100 mm. A lower bracket (16) is mounted on the upper end surface of a side plate (42); the lower fixed beam (18) and the upper fixed beam (19) both span the back of the seedling box, the lower fixed beam (18) is located below the upper fixed beam (19) and is connected to the bottom plates (22) of each lower seedling box, the upper side of the upper fixed beam (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 beam bracket; The cutting mechanism comprises a vertically arranged cutting shaft (29) and a sliding cutting knife (30); the cutting 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 cutting shaft (29) and is located in the square; the upper end of the sliding cutting knife (30) is fixedly connected to the lower end of the cutting shaft (29) by bolts; the lower end of the sliding cutting knife (30) is located above the seedling blanket (44); The cutter pressing drive assembly comprises a first driving shaft (8), a first synchronous belt drive, a first motor (23), a cam (11) and a pressing plate (27); the first driving 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 driving shaft (8) through the first synchronous belt drive; a cam (11) is provided on the first driving shaft (8) at the middle of each cutting unit; and the cam (11) is provided with a near-rest angle, a rotation angle of 180 degrees, and a rotation angle of 180 degrees. A push stroke motion angle, a far rest angle and a return stroke motion angle, wherein the return stroke 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 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; and the sliding cutter (30) can achieve one downward and upward movement every time the cam (11) rotates 180°; 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.

2. The rice blanket seedlings transplanting machine cutting device according to claim 1, characterized in that: The lower seedling box bottom plate (22) has the same width as the upper seedling box bottom plate (1) and has a flush upper surface. 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 and includes 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).

3. The rice blanket seedlings transplanting machine cutting device according to claim 2 is characterized by: The cross section of the sliding cutter (30) is rectangular, a sliding cutting edge is provided at the lower end of the sliding cutter (30) and the side edge is not sharpened, and 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 seedling feeding direction, and the tip of the cutter is within 10 mm from the upper surface of the seedling blanket (44).

4. The rice blanket seedlings transplanting machine cutting device according to claim 3 is characterized by: 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.

5. The rice blanket seedlings transplanting machine cutting device according to claim 4, 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.

6. The rice blanket seedlings transplanting machine cutting device according to claim 5, 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).

7. The rice blanket seedlings transplanter cutting device according to claim 6, 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.

8. A method for cutting rice blanket seedlings into pieces using the rice blanket seedling throwing machine cutting device according to any one of claims 3 to 7, 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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