Rice film mulching and transplanting machine

Abstract

The utility model discloses a kind of rice film mulching rice transplanter, including rice transplanter vehicle, the connecting base frame of being arranged in the rear end of the rice transplanter vehicle, seedling table mechanism and film mulching mechanism being arranged on the connecting base frame, the several floating boats of being arranged in the lower end of the connecting base frame, the rice transplanting mechanism and grab cut film mechanism being arranged in the front end of the connecting base frame, the rear end of the floating boat is equipped with guiding film pressing roller, the guiding film pressing roller and the rice transplanting mechanism between being equipped with trepanning device, the trepanning device is driven by the rice transplanting mechanism. Can solve the problem that seedling cannot be accurately implanted due to the misregistration of film trepanning during film mulching process, simple structure, convenient disassembly and reassembly, low transformation cost.

Description

Technical Field

[0001] This utility model relates to the technical field of rice transplanters, specifically to a rice mulching transplanter. Background Technology

[0002] The mulched rice transplanter is based on the conventional rice transplanter, which includes a transplanter carriage, connecting frame, seedling platform mechanism, transplanting mechanism, and floating boat. It adds a mulching mechanism and an opening device. The mulching mechanism typically consists of a film roller frame, guide film rollers, mulching rollers, and pressing side wheels mounted on the connecting frame. The mulching roll is fixed by the film roller frame. After the film is pulled outwards, it is guided by the guide film rollers and then extends from below the mulching rollers. The mulching rollers at the front of the transplanting mechanism spread the film flat on the ground, while the two sides of the film are pressed into the soil by the pressing side wheels. To facilitate automatic film grabbing and cutting after the transplanter carriage has laid the film in one pass, existing mulched rice transplanters also have specialized film grabbing and cutting devices, as shown in patent 202323602380.X.

[0003] However, existing guide film-pressing rollers are all installed using independent brackets. The large span between the guide film-pressing roller and the front-end film-covering roller causes the film-pressing trajectory of the guide film-pressing roller to not accurately match the insertion trajectory of the planting arm on the transplanting mechanism. In addition, the design position of the hole-opening device is unreasonable, which easily causes hole position deviation when opening the transplanting hole after film covering. Furthermore, the hole position after film covering is prone to air pockets, making it impossible to accurately insert the seedlings into the hole during planting. Moreover, the structure is complex, making it difficult to adjust the connecting base frame, and the overall disassembly and assembly costs are high, and the operation is difficult. At the same time, the existing hole-opening device is generally an independent mechanism, which is not well integrated with the planting component. This results in problems such as unreasonable structure, complex structure, frequent operation failures, and poor hole position accuracy during hole opening. The hole-opening knife is also prone to damaging the seedlings, resulting in a reduced survival rate of the transplanted seedlings. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a rice mulching transplanter that can solve the problem that the seedlings cannot be accurately planted because the film is easily misaligned after the opening is made during the mulching process. It has a simple structure, is easy to disassemble and assemble, and has low modification cost.

[0005] To solve the aforementioned technical problems, this application adopts the following technical solution: A rice transplanter with film covering includes a transplanter vehicle, a connecting frame at the rear end of the transplanter vehicle, a seedling platform mechanism and a film covering mechanism on the connecting frame, several floating boats at the lower end of the connecting frame, a transplanting mechanism and a film-cutting mechanism at the front end of the connecting frame, a guide film-pressing roller at the rear end of the floating boat, and an opening device between the guide film-pressing roller and the transplanting mechanism, the opening device being driven by the transplanting mechanism.

[0006] Preferably, the end of the floating boat is provided with a U-shaped membrane seat, and both ends of the guide pressure roller are fixed on the U-shaped membrane seat.

[0007] Preferably, the rice transplanting mechanism includes a sprocket box mounted on the connecting base frame, a drive sprocket shaft extending through the rear end of the sprocket box at both ends, a large sprocket shaft at the front end of the sprocket box, a rotary box at both ends of the large sprocket shaft, and a planting arm mounted on the rotary box. An adjustment frame is provided between the front top surface of the floating boat and the connecting base frame. The opening device is located between the adjustment frame and the drive sprocket shaft, and the opening device uses the drive sprocket shaft as a power source to break the film and open the hole.

[0008] Preferably, the perforation device includes a mounting rod horizontally arranged on the adjustment frame, a perforation knife arranged on the mounting rod, and a drive mechanism arranged between the mounting rod and the drive sprocket shaft. The mounting rod is fixed on the adjustment frame by a bushing. A perforation knife is provided on each side of the sprocket box. The perforation knife drives the drive mechanism to rotate the mounting rod by the rotation of the drive sprocket shaft to perform the perforation operation on the film.

[0009] Preferably, the front end of the floating boat is provided with inwardly recessed notches on both sides, and the membrane-breaking opening position of the piercing knife is located within the notches.

[0010] Preferably, the drive mechanism includes a cam mounted on the drive sprocket shaft, a drive shaft mounted on the cam, a drive rod mounted on the mounting rod, and a transmission rod with its two ends rotatably connected to the drive shaft and the drive rod, respectively.

[0011] Preferably, one end of the transmission rod is provided with a bearing, and one end of the transmission rod is connected to the transmission shaft through the bearing.

[0012] Preferably, the connecting end of the drive rod and the transmission rod is provided with a pin.

[0013] Preferably, the punch includes a punch holder with one end mounted on the mounting rod and a punch body with one end fixed on the punch holder. The front side of the punch holder is provided with a mounting groove with a fixing hole, and the end of the punch body is fixed in the mounting groove.

[0014] Preferably, one end of the tool holder is provided with an open clamping groove, and the open end of the clamping groove is provided with a bolt mounting hole. After the mounting rod is inserted into the clamping groove, it is clamped and fixed by installing bolts through the bolt mounting hole.

[0015] Preferably, the mounting rod is a square metal rod, and the bushing is sleeved on the mounting rod and fixed on one side to the adjustment frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Based on the existing rice mulching transplanter, the position and structure of the perforation device and the guide film-pressing roller are improved, so that a guide film-pressing roller is installed at the rear end of each floating boat. The perforation device is driven by the transplanting mechanism. After the guide film-pressing roller presses down and guides the film to the ground in the targeted area, it can bring the film closer to the ground, or even achieve the effect of direct film application. Moreover, the distance between the guide film-pressing roller and the front film-covering roller is closer, so that the film is in a relatively straight state when perforating, resulting in higher hole position accuracy during perforation and after film covering. The planting arm can be more precise when transplanting rice seedlings. This solves the problem that the film is prone to misalignment after perforation during the film covering process, which leads to inaccurate seedling planting. In addition, when adding the guide film-pressing roller, there is no need to install a separate complex support structure. The overall modification structure is simple, easy to disassemble and assemble, and has low modification cost. Furthermore, the hole-opening device is directly driven by the rice transplanting mechanism, eliminating the need for additional driving force during the process. Moreover, the rice transplanting operation is performed immediately after each hole opening, effectively ensuring the synchronization of hole opening and rice transplanting and preventing situations such as misaligned transplanting, misaligned holes, or multiple openings after hole opening. Attached Figure Description

[0017] Figure 1 This is a side view of the overall structure of the present invention. Figure 2 This is a partial schematic diagram of a rice transplanting mechanism, a floating boat, and an opening device in this utility model; Figure 3 This is a schematic diagram of the rice transplanting mechanism and the hole-opening device in this utility model, showing the connection relationship between the hole-opening devices; Figure 4 This is a schematic diagram of the structure of the hole-opening knife of this utility model, which is connected to the drive sprocket shaft through a drive mechanism; In the diagram: 1. Rice transplanter; 2. Connecting frame; 3. Seedling platform mechanism; 4. Film cutting mechanism; 5. Transplanting mechanism; 51. Sprocket box; 52. Drive sprocket shaft; 53. Rotary box; 54. Large sprocket shaft; 55. Planting arm; 6. Floating boat; 61. Notch; 7. Film covering mechanism; 71. Film covering roller; 72. Film pressing side roller; 73. Guide film pressing roller; 74. Film roller frame; 8. Adjusting frame; 9. Hole opening device; 91. Hole opening knife; 911. Knife body; 912. Knife holder; 913. Mounting groove; 914. Bolt mounting hole; 915. Clamping groove; 92. Drive mechanism; 921. Transmission shaft; 922. Bearing; 923. Cam; 924. Transmission rod; 925. Drive rod; 926. Pin; 93. Bushing; 94. Mounting rod; 10. U-shaped film seat. Detailed Implementation

[0018] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] like Figure 1 and Figure 2 As shown, a rice transplanter with plastic film covering is described, wherein the structure in the prior art includes, for example, the following. Figure 1The rice transplanter 1, connecting base frame 2, seedling platform mechanism 3, film covering mechanism 7, floating boat 6, transplanting mechanism 5, and film-cutting mechanism 4 are included. The film covering mechanism 7 includes a film roller frame 74, a film covering roller 71, and a film pressing side wheel 72 mounted on the connecting base frame 2, and a guide film pressing roller 73 mounted on the rear end of the floating boat 6. The transplanting mechanism 5 includes a sprocket box 51 mounted on the connecting base frame 2, a drive sprocket shaft 52 with both ends passing through the rear end of the sprocket box 51, a large sprocket shaft 54 ​​located at the front end of the sprocket box 51, and a rotary sprocket shaft 54 ​​located at both ends of the large sprocket shaft 54. The rotating box 53 and the planting arm 55 are mounted on the rotating box 53. An adjustment frame 8 is provided between the top front surface of the floating boat 6 and the connecting base frame 2. During the film covering process, the film covering roll is fixed by the film roller frame 74. After the film is pulled outward, it is guided by the guide film pressing roller 73 and then extends from below the film covering roller 71. The film is laid flat on the ground by the film covering roller 71 at the front end of the transplanting mechanism 5, while the two sides of the film are pressed into the soil by the film pressing side wheels 72 on both sides. After the film is laid once, the film is cut and grabbed by the film cutting mechanism 4 for the second laying. In order to solve the defects of the existing installation structure of the guide film pressing roller 73 and the opening device 9, it is improved. The improved guide film pressing roller 73 is installed at the rear end of the floating boat 6, and an opening device 9 is provided between the guide film pressing roller 73 and the transplanting mechanism 5. The opening device 9 is driven by the transplanting mechanism 5.

[0022] During the film laying process, the guide film-pressing roller 73 can guide the film in a targeted manner for the planting area of ​​each transplanting mechanism 5. After the guide film-pressing roller 73 presses down and guides the film to the ground, it can bring the film closer to the ground, even achieving a direct film-applying effect. Moreover, the closer distance between the guide film-pressing roller 73 and the front covering roller 71 ensures that the film is in a relatively straight state when the holes are made, resulting in higher hole position accuracy during and after covering. This allows the planting arm 55 to transplant the seedlings more accurately, thus solving the problem of misalignment of the film after the holes are made during the covering process, which leads to inaccurate seedling planting. The pressure from the covering roller 71 also provides a tensioning effect, further improving the hole position accuracy of the hole-making device 9. Direct transplanting after hole making will not result in hole misalignment. The hole-making device 9 is driven by the transplanting mechanism 5. Furthermore, when adding the guide film-pressing roller 73, there is no need to install a separate complex support structure. The overall modification structure is simple, easy to assemble and disassemble, and has low modification cost. Furthermore, the hole-opening device 9 is directly driven by the rice transplanting mechanism 5, eliminating the need for additional driving force during the driving process. Moreover, the rice transplanting operation is performed immediately after each hole opening, effectively ensuring the synchronization of hole opening and rice transplanting and preventing situations such as misaligned transplanting, misaligned holes, or multiple openings after hole opening.

[0023] A further improvement is that the end of the floating boat 6 is provided with a U-shaped film seat 10, and the two ends of the guide pressure roller 73 are fixed on the U-shaped film seat 10.

[0024] The U-shaped film holder 10 can be directly fixed to the end of the floating boat 6 with screws, and both ends of the guide film pressing roller 73 are fixed to the U-shaped film holder 10 through bearings 922, etc., making installation simpler and more convenient. At the same time, it solves the problems of complex installation, high cost and high operation difficulty of the existing support structure. By installing the guide film pressing roller 73 at the end of the floating boat 6, the height of the guide film pressing roller 73 can also be adjusted by adjusting the tilt of the floating boat 6. In particular, the floating boat 6 itself plays a certain role in leveling, and when moving along the surface of the paddy field, it can directly cover the paddy field with a straight film.

[0025] A further improvement is that the opening device 9 is located between the adjustment frame 8 and the drive sprocket shaft 52, and the opening device 9 uses the drive sprocket shaft 52 as a power source to perform membrane breaking and opening.

[0026] The perforation device 9 uses the drive sprocket shaft 52 on the sprocket box 51 as a power source for perforation. No additional driving force is needed during the driving of the drive mechanism 92. Furthermore, the planting operation is performed immediately after each perforation, effectively ensuring the synchronization of perforation and planting, and preventing misalignment, misalignment of holes, or multiple perforations. The mounting rod 94 is fixed to the adjustment frame 8 as a fulcrum, facilitating easy position adjustment of the perforation device 9. After installation, the positional accuracy of the perforation cutter 91 is effectively guaranteed; preventing misalignment of the perforation due to the rotation of the drive mechanism 92 via the rotation of the drive sprocket shaft 52.

[0027] Further improvements include, for example Figure 3 and Figure 4 As shown, the perforation device 9 includes a mounting rod 94 horizontally arranged on the adjustment frame 8, a perforation knife 91 arranged on the mounting rod 94, and a drive mechanism 92 arranged between the mounting rod 94 and the drive sprocket shaft 52. The mounting rod 94 is fixed on the adjustment frame 8 by a bushing 93. A perforation knife 91 is provided on each side of the sprocket box 51. The perforation knife 91 drives the drive mechanism 92 to rotate the mounting rod 94 by the rotation of the drive sprocket shaft 52, thereby realizing the perforation operation of the film.

[0028] During the planting process, the rotation of the active sprocket shaft 52 drives the sprocket mechanism inside the sprocket box 51 to drive the large sprocket shaft 54 ​​to rotate synchronously, thereby realizing the rotation of the rotary box 53 and the planting arm 55 planting the seedlings. The front end of a typical rice transplanter with mulching usually has multiple planting mechanisms working simultaneously. Both the transplanter and the adjusting frame 8 are mounted on a horizontal bar connecting the base frame 2 for height control. The added perforating device 9 is also driven by the active sprocket shaft 52 on the sprocket box 51 as a power source, eliminating the need for additional driving force. The mounting rod 94, parallel to the horizontal bar, is mounted using the adjusting frame 8 as a fulcrum. The perforating cutter 91 is mounted on the mounting rod 94. After installation, the driving mechanism 92 generally has… At least two sets are provided to facilitate synchronous rotation of the mounting rod 94 at both ends. The mounting rod 94 and the adjusting frame 8 are fixed by bushings 93 to facilitate relative rotation of the mounting rod 94. After installation, each sprocket box 51 forms a hole-opening knife 91 on both sides. The opening position of the blade tip of the hole-opening knife 91 is exactly at the rice planting entrance. Since the hole-opening knife 91 is driven by the drive mechanism 92 to open the hole, during operation, only the position and trajectory of the hole-opening knife 91 need to be adjusted. Because the power source is the same as that of the planting arm 55 and the two are set adjacent to each other, the opening position can be effectively guaranteed, avoiding the phenomenon of film opening misalignment caused by the rotation of the hole-opening knife 91 driving the drive mechanism 92 to rotate the mounting rod 94 through the rotation of the active sprocket shaft 52.

[0029] A further improvement is that the front end of the floating boat 6 is provided with inwardly recessed notches 61 on both sides, and the membrane-breaking opening position of the piercing knife 91 is located within the notches 61.

[0030] During the process of opening the hole, the bottom of the floating boat 6 can limit the height of the film between the two holes, thereby preventing the film from floating too much up and down during the opening process and causing the hole to be opened incorrectly. In addition, the opening position of the opening knife 91 is located within the notch 61. While ensuring the flatness of the film, it also allows the position of the opening knife 91 to be closer to the planting arm 55. After each opening, the rice planting operation is carried out immediately, which effectively ensures the synchronization of opening and planting, and avoids the occurrence of misaligned planting, misaligned holes, or multiple openings after opening.

[0031] A further improvement is made to the drive mechanism 92, which includes a cam 923 mounted on the drive sprocket shaft 52, a transmission shaft 921 mounted on the cam 923, a drive rod 925 mounted on the mounting rod 94, and a transmission rod 924 rotatably connected at both ends to the transmission shaft 921 and the drive rod 925, respectively.

[0032] Cam 923 is clamped to the extended end of drive sprocket shaft 52, and a drive shaft 921 extends outward from cam 923 to facilitate the rotation and fixation of one end of drive rod 924. One end of drive rod 925 is fixed to mounting rod 94, and the other end is rotatably connected to drive rod 924. The cam 923 and mounting rod 94 are connected by the combination of drive shaft 921 and drive rod 925. When drive sprocket shaft 52 rotates, cam 923 rotates synchronously, and drive shaft 921 rotates around drive sprocket shaft 52. Drive shaft 921 drives one end of drive rod 924 to rotate synchronously, so that drive rod 924 reciprocates and pulls drive rod 925. Finally, drive rod 925 drives mounting rod 94 to rotate relative to it. The rotation of mounting rod 94 drives hole cutter 91 to rotate at a certain angle to achieve the membrane breaking and hole opening operation. The entire drive structure is simple, easy to operate, highly stable, and will not have the problem of insufficient power.

[0033] A further improvement is that one end of the transmission rod 924 is provided with a bearing 922, and one end of the transmission rod 924 is connected to the transmission shaft 921 through the bearing 922; the connection end of the drive rod 925 and the transmission rod 924 is provided with a pin 926.

[0034] The transmission rod 924 adopts a structure similar to a fisheye joint shaft. One end is connected to the transmission shaft 921 via a bearing 922, and the other end is connected to the transmission rod 924 via a pin 926. During rotation, this design ensures both long-term rotational flexibility at the connection point of the transmission shaft 921 and relative push-pull flexibility of the lower end towards the drive rod 925, preventing jamming. The drive rod 925 is formed by bending a metal plate. The connecting end is bent to form two relatively parallel connecting plates, with a limiting groove between them. One end of the drive rod 925 is located within the limiting groove. This design better ensures relative rotational stability when connecting the transmission rod 924 and the pin 926, and also provides strong structural versatility and high stability.

[0035] Based on any of the above technical solutions, the hole-opening knife 91 is further improved as follows: one end of the knife holder 912 is mounted on the mounting rod 94, and the other end of the knife body 911 is fixed on the knife holder 912. The front side of the knife holder 912 is provided with a mounting groove 913 with a fixing hole, and the end of the knife body 911 is fixed in the mounting groove 913.

[0036] When installing the cutter body 911, the end of the cutter body 911 is inserted into the mounting groove 913, and then fixed by directly inserting bolts or screws into the fixing hole. When the cutter body 911 is driven to open the hole by the drive sprocket shaft 52, the fixed position of the cutter body 911 can be accurately guaranteed, thereby avoiding the situation where the cutter body 911 tilts due to the resistance of the soil after breaking the film. It can also ensure that the tilt angle of the cutter body 911 is fixed after installation, avoiding the problem of opening the hole when breaking the film. Moreover, the structure of the mounting groove 913 can also easily control the extension length of the cutter body 911. It can be adjusted by simply opening multiple holes or long strip holes on the cutter body 911.

[0037] A further improvement is made in that one end of the tool holder 912 is provided with an open clamping groove 915, and the open end of the clamping groove 915 is provided with a bolt mounting hole 914. After the mounting rod 94 is inserted into the clamping groove 915, it is clamped and fixed by installing bolts through the bolt mounting hole 914.

[0038] When connecting the tool holder 912 to the mounting rod 94, first align the mounting rod 94 with the clamping groove 915 of the tool holder 912, insert it, and move it to the desired position. Finally, pull the bolt into the bolt mounting hole 914 and tighten it with the nut to make the open end of the clamping groove 915 form a relative clamp. After tightening the bolt, the clamping groove 915 clamps and fixes the mounting rod 94. The operation is simple and the fixation is convenient. The outline of the clamping groove 915 is slightly larger than that of the mounting rod 94 and the shape is basically the same. When clamping, the clamping force is better. The shape of the clamping groove 915 is shown in the figure. One end of the tool holder 912 forms a C-shaped structure through the clamping groove 915.

[0039] A further improvement is made in that the mounting rod 94 is a square metal rod, and the bushing 93 is sleeved on the mounting rod 94 and fixed on one side to the adjustment frame 8.

[0040] The mounting rod 94 adopts a square metal rod structure, which provides better stability after connecting and fixing the cutter holder 912 and the drive mechanism 92, preventing self-rotation and thus making the trajectory of the drilling cutter 91 more stable and precise, without rotation. Meanwhile, one end of the drive rod 925 is connected to it via a square hole, eliminating the need for a limiting structure and a positioning structure during assembly. At least two sets of bushings 93 are used, each consisting of an inner and an outer sleeve. The inner hole of the inner sleeve is a square hole structure, allowing the square mounting rod 94 to rotate relative to the drive mechanism 92 during its movement. One side of the bushing 93 is fixed to the adjustment frame 8, synchronously driving its lifting and lowering when the entire seedling platform mechanism 3 moves up and down. Especially when the adjustment frame 8 adjusts the height of the floating boat 6, it can also achieve synchronous fine-tuning, ensuring the position adjustment of the front end of the cutter body 911 in different scenarios.

[0041] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A rice seedling transplanting and mulching machine, comprising a seedling transplanting machine vehicle (1), a connecting base frame (2) arranged at the rear end of the seedling transplanting machine vehicle (1), a seedling table mechanism (3) and a mulching mechanism (7) arranged on the connecting base frame (2), a plurality of floating boats (6) arranged at the lower end of the connecting base frame (2), a seedling transplanting mechanism (5) and a film grabbing and cutting mechanism (4) arranged at the front end of the connecting base frame (2), characterized in that: The rear end of the floating boat (6) is provided with a guide pressing roller (73), and an opening device (9) is provided between the guide pressing roller (73) and the rice transplanting mechanism (5). The opening device (9) is driven by the rice transplanting mechanism (5).

2. The rice film mulching and transplanting machine according to claim 1, characterized in that: The end of the floating boat (6) is provided with a U-shaped film seat (10), and the two ends of the guide pressure roller (73) are fixed on the U-shaped film seat (10).

3. The rice film mulching and transplanting machine according to claim 2, characterized in that: The rice transplanting mechanism (5) includes a sprocket box (51) installed on the connecting base frame (2), a drive sprocket shaft (52) with both ends passing through the rear end of the sprocket box (51), a large sprocket shaft (54) at the front end of the sprocket box (51), a rotary box (53) at both ends of the large sprocket shaft (54), and a planting arm (55) on the rotary box (53). An adjustment frame (8) is provided between the top surface of the front end of the floating boat (6) and the connecting base frame (2). The opening device (9) is located between the adjustment frame (8) and the drive sprocket shaft (52). The opening device (9) uses the drive sprocket shaft (52) as a power source to break the film and open the hole.

4. The rice film mulching and transplanting machine according to claim 3, characterized in that: The perforation device (9) includes a mounting rod (94) horizontally arranged on the adjustment frame (8), a perforation knife (91) on the mounting rod (94), and a drive mechanism (92) between the mounting rod (94) and the drive sprocket shaft (52). The mounting rod (94) is fixed on the adjustment frame (8) by a bushing (93). A perforation knife (91) is provided on each side of the sprocket box (51). The perforation knife (91) drives the drive mechanism (92) to rotate the mounting rod (94) by the rotation of the drive sprocket shaft (52) to achieve the perforation operation on the film.

5. The rice film mulching and transplanting machine according to claim 4, wherein: The front end of the floating boat (6) is provided with inwardly recessed notches (61) on both sides, and the membrane breaking opening position of the piercing knife (91) is located in the notch (61).

6. The rice film mulching and transplanting machine according to claim 4, wherein: The drive mechanism (92) includes a cam (923) mounted on the drive sprocket shaft (52), a transmission shaft (921) mounted on the cam (923), a drive rod (925) mounted on the mounting rod (94), and a transmission rod (924) rotatably connected at both ends to the transmission shaft (921) and the drive rod (925).

7. The rice film mulching and transplanting machine according to claim 6, characterized in that: The drilling tool (91) includes a tool holder (912) with one end mounted on the mounting rod (94) and a tool body (911) with one end fixed on the tool holder (912). The front side of the tool holder (912) is provided with a mounting groove (913) with a fixing hole, and the end of the tool body (911) is fixed in the mounting groove (913).

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