Rice straw crushing and returning method and device

Abstract

The application discloses a rice straw smashing and returning to field method and device, relates to the technical field of rice straw smashing and returning to field, and comprises a mounting frame, the upper surface of the mounting frame is fixedly connected with mounting buckles, the bottom surface of the mounting frame is fixedly connected with two connecting frames, the upper portions of the two connecting frames are commonly provided with a sorting mechanism, the sorting mechanism comprises a conveying belt, the conveying belt is arranged between the two connecting frames, the outer surface of the conveying belt is fixedly connected with a plurality of collecting rods, the interiors of the two connecting frames are commonly rotationally connected with driving shafts, the outer surface of the driving shafts is in contact with the inner wall of the conveying belt, the rice straw smashing and returning to field method and device can separate the straw on the rice field ground from the straw carrying rice roots in the soil, can smash the straw root portions and the straw stems respectively, can effectively prevent the straw from being excessively wound together, guarantees the smashing effect of the straw, makes the smashed straw not easy to be accumulated into blocks in the soil, and guarantees the uniformity of the mixed straw and soil after the straw is smashed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rice straw crushing and returning to the field, in particular to a rice straw crushing and returning to the field method and device. BACKGROUND

[0002] A large amount of straw is generated during the harvesting of rice. Since the straw is directly discarded in the rice field and takes a long time to decompose, it affects the planting of the next season of rice or other crops, and thus the rice straw needs to be crushed and returned to the field. Scientific experiments show that the straw of rice, wheat and corn crops can not only increase the organic matter content of the soil, increase the fertilizer efficiency and improve the soil structure, but also reduce the labor intensity and effectively avoid environmental pollution caused by burning straw. The current method of crushing and returning rice straw to the field is to drive a straw crushing device with a tractor, use a gearbox to gradually transmit the power transmitted by the tractor to the straw crushing device through a transmission shaft and a belt pulley, and achieve the purpose of crushing rice straw through the straw crushing device.

[0003] However, the existing rice straw crushing device can only crush the surface straw and the straw carrying rice roots inside the soil together when in use, which causes the straw to be excessively entangled, affects the uniformity of straw returning to the field, and also leads to poor crushing effect of the straw, which cannot crush the rice straw into small pieces and mix it into the soil more efficiently, resulting in the problem that the crushed rice straw is easily accumulated in the soil and affects subsequent seeding.

[0004] However, we can find that the existing rice straw crushing and returning to the field device can hardly avoid the above-mentioned problems at the same time when in use, and even if it can solve the problems, it needs to be solved by external tools, so it cannot achieve the desired effect. Therefore, we propose a rice straw crushing and returning to the field method and device. SUMMARY

[0005] The present application aims to provide a rice straw crushing and returning to the field method and device to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method and apparatus for crushing and returning rice straw to the field, comprising an installation frame, wherein an installation buckle is fixedly connected to the upper surface of the installation frame, and two connecting frames are fixedly connected to the bottom surface of the installation frame. A sorting mechanism is provided above the two connecting frames. The sorting mechanism includes a conveyor belt, which is disposed between the two connecting frames. A plurality of collecting rods are fixedly connected to the outer surface of the conveyor belt. A drive shaft is rotatably connected inside the two connecting frames. The outer surface of the drive shaft contacts the inner wall of the conveyor belt. A first gear is fixedly connected to one end of the drive shaft. A first pulley is rotatably connected to the front of one of the connecting frames. A second gear is fixedly connected to the outer surface of the first pulley. The outer surface of the second gear meshes with the outer surface of the first gear. A first belt is drively connected to the outer surface of the first pulley.

[0007] A crushing mechanism is fixedly installed on the upper surface of the sorting mechanism, and a crushing and mixing mechanism is provided below the mounting frame.

[0008] Preferably, the upper surfaces of both connecting frames are fixedly connected with first reinforcing ribs, and the other ends of the two first reinforcing ribs are fixedly connected to the right side of the mounting frame.

[0009] Preferably, the two connecting frames are rotatably connected internally to a driven shaft, and the outer surfaces of the driven shafts are in contact with the inner wall of the conveyor belt.

[0010] Preferably, the bottom surfaces of both connecting frames are fixedly connected to auxiliary frames, and the bottom surfaces of both auxiliary frames are rotatably connected to two rollers.

[0011] Preferably, the crushing mechanism includes a protective cover, the upper surfaces of the two connecting frames are fixedly connected to the bottom surface of the protective cover, a collecting frame is fixedly connected to the left side of the protective cover, an auxiliary shaft is rotatably connected inside the collecting frame, several auxiliary rods are fixedly connected to the outer surface of the auxiliary shaft, a third gear is fixedly connected to one end of the auxiliary shaft, the outer surface of the third gear meshes with the outer surface of the first gear, several auxiliary grooves are opened in the inner bottom wall of the protective cover, three discharge hoods are fixedly connected to the right side of the protective cover, four rotating rods are rotatably connected inside the protective cover, several crushing blades are fixedly connected to the outer surface of each of the four rotating rods, a fourth gear is fixedly connected to one end of each of the four rotating rods, the outer surfaces of two adjacent fourth gears mesh with each other, a second pulley is fixedly connected to the front of each of the two fourth gears, a second belt is driven by the outer surfaces of the two second pulleys, and a third belt is driven by the outer surface of one of the second pulleys.

[0012] Preferably, the upper surface of the protective cover is hingedly connected with an access door, and the upper surface of the access door is fixedly connected with a handle.

[0013] Preferably, the crushing and mixing mechanism comprises a fixed frame, the bottom surfaces of the two connecting frames are fixedly connected with the upper surface of the fixed frame, a connecting shaft is rotatably connected in the fixed frame, a plurality of crushing knives are fixedly connected with the outer surface of the connecting shaft, a third belt wheel is fixedly connected with one end of the connecting shaft, the inner walls of the first belt and the third belt are in transmission connection with the outer surface of the third belt wheel, a gear reverser is in transmission connection with the outer surface of the connecting shaft, the upper surface of the gear reverser penetrates to the upper side of the fixed frame, four supporting frames are fixedly connected with the upper surface of the fixed frame, a connecting plate is fixedly connected with the bottom surfaces of the four supporting frames, four fixing bases are fixedly connected with the bottom surface of the connecting plate, and a plowshare is fixedly connected with the front surface of each fixing base.

[0014] Preferably, the front surface and the back surface of the gear reverser are fixedly connected with second reinforcing ribs, and the other ends of the two second reinforcing ribs are fixedly connected with the mutually close sides of the two connecting frames.

[0015] Preferably, a fixed shaft is fixedly connected with the input end of the gear reverser, and a fixed buckle is fixedly connected with the left end of the fixed shaft.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1、Through the cooperation of the connecting frame and the driving shaft, the first belt drives the second gear to rotate counterclockwise through the first belt wheel, and then the first gear drives the driving shaft and the conveyor belt to rotate clockwise through the meshing of the second gear and the first gear, so that the straw on the rice field ground and the straw carrying rice roots in the soil can be separated through the collecting rod on the conveyor belt and the inclination angle of the conveyor belt, the straw roots and the straw stems are separated, the straw roots and the straw stems are crushed respectively, the straw is prevented from being wound together too much, the crushing effect of the straw is ensured, the rice straw can be crushed into small pieces more efficiently, the crushed straw is not easy to accumulate into blocks in the soil, and the uniformity of the mixture of the crushed straw and the soil is ensured.

[0018] 2、The present application is provided with the meshing of the third gear and the first gear, with the clockwise rotation of the first gear, the third gear and the auxiliary shaft can be driven to rotate counterclockwise, and then the auxiliary rod can be used to send the straw into the protective cover, and then the third belt can be used to drive the two rotating rods above to rotate counterclockwise, and then the fourth gear can be used to drive the two rotating rods below to rotate clockwise, and then the pulverizing knife can be used to pulverize the rice straw in the protective cover, and then the discharge cover can be used to discharge the rice straw, so that the rice straw can be quickly pulverized into fine slag, and the effect of ensuring that the straw pulverization can not affect the subsequent seeding is achieved.

[0019] 3、The present application is provided with the meshing of the third gear and the first gear, with the clockwise rotation of the first gear, the third gear and the auxiliary shaft can be driven to rotate counterclockwise, and then the auxiliary rod can be used to send the straw into the protective cover, and then the third belt can be used to drive the two rotating rods above to rotate counterclockwise, and then the fourth gear can be used to drive the two rotating rods below to rotate clockwise, and then the pulverizing knife can be used to pulverize the rice straw in the protective cover, and then the discharge cover can be used to discharge the rice straw, so that the rice straw can be quickly pulverized into fine slag, and the effect of ensuring that the straw pulverization can not affect the subsequent seeding is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the present application;

[0022] Figure 3 It is a schematic diagram of the structure of the present application;

[0023] Figure 4 It is a schematic diagram of the structure of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the present application;

[0025] Figure 6 It is a schematic diagram of the structure of the present application; Figure 5 It is a schematic diagram of the structure of the present application;

[0026] Figure 7 It is a schematic diagram of the structure of the present application;

[0027] Figure 8 It is a schematic diagram of the structure of the present application;

[0028] In the figure:

[0029] 1, mounting frame;

[0030] 2, mounting buckle;

[0031] 3, connecting frame;

[0032] 4, sorting mechanism; 401, conveyor belt; 402, collecting rod; 403, driving shaft; 404, first gear; 405, first pulley; 406, second gear; 407, first belt; 408, first reinforcing rib; 409, driven shaft; 410, auxiliary frame; 411, roller;

[0033] 5, crushing mechanism; 501, protective cover; 502, collecting frame; 503, auxiliary shaft; 504, auxiliary rod; 505, third gear; 506, auxiliary groove; 507, discharge cover; 508, rotating rod; 509, crushing knife; 510, fourth gear; 511, second pulley; 512, second belt; 513, third belt; 514, access door; 515, handle;

[0034] 6, crushing and mixing mechanism; 601, fixed frame; 602, connecting shaft; 603, crushing knife; 604, third pulley; 605, gear reverser; 606, support frame; 607, connecting plate; 608, fixed seat; 609, plow head; 610, second reinforcing rib; 611, fixed shaft; 612, fixed buckle. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] Example 1: Please refer to Figures 1-8The application provides a technical scheme: a rice straw crushing and returning to field method and device, which comprises a mounting frame 1, the upper surface of the mounting frame 1 is fixedly connected with a mounting buckle 2, the bottom surface of the mounting frame 1 is fixedly connected with two connecting frames 3, the upper parts of the two connecting frames 3 are commonly provided with a sorting mechanism 4, the sorting mechanism 4 comprises a conveying belt 401, the conveying belt 401 is arranged between the two connecting frames 3, the outer surface of the conveying belt 401 is fixedly connected with a plurality of collecting rods 402, the inner parts of the two connecting frames 3 are commonly rotationally connected with a driving shaft 403, the outer surface of the driving shaft 403 is in contact with the inner wall of the conveying belt 401, one end of the driving shaft 403 is fixedly connected with a first gear 404, the front surface of one of the connecting frames 3 is rotationally connected with a first pulley 405, the outer surface of the first pulley 405 is fixedly connected with a second gear 406, the outer surface of the second gear 406 is meshedly connected with the outer surface of the first gear 404, and the outer surface of the first pulley 405 is transmissionally connected with a first belt 407.

[0037] The upper surfaces of the two connecting frames 3 are fixedly connected with first reinforcing ribs 408, the other ends of the two first reinforcing ribs 408 are fixedly connected with the right side surface of the mounting frame 1, the first reinforcing ribs 408 can increase the connecting strength of the connecting frames 3 and the mounting frame 1, the mounting frame 1 is not prone to loosening, and the pressure-bearing strength of the mounting frame 1 is improved.

[0038] The inner parts of the two connecting frames 3 are commonly rotationally connected with a driven shaft 409, the outer surfaces of the driven shafts 409 are in contact with the inner walls of the conveying belts 401, the driven shafts 409 can keep the conveying belts 401 to maintain a moving inclination angle in cooperation with the connecting frames 3 without affecting the rotation of the conveying belts 401, and the normal use of the conveying belts 401 is ensured.

[0039] The bottom surfaces of the two connecting frames 3 are fixedly connected with auxiliary frames 410, the bottom surfaces of the two auxiliary frames 410 are rotationally connected with two rollers 411, the auxiliary frames 410 in cooperation with the rollers 411 can increase the smoothness of the device in use, reduce the friction of the device on the rice field, limit the position of the device on the rice field, and ensure the stability of the device in use.

[0040] The specific implementation of the embodiment is that the connecting frame 3 cooperates with the driving shaft 403, the first belt 407 drives the second gear 406 to rotate counterclockwise in cooperation with the first pulley 405, then the first gear 404 drives the driving shaft 403 and the conveying belt 401 to rotate clockwise through the meshing of the second gear 406 and the first gear 404, at this time, the straw on the ground of the rice field and the straw carrying the rice roots in the soil can be separated through the collecting rods 402 on the conveying belt 401 and the inclination angle of the conveying belt 401 itself, the straw roots and the straw stems are sorted and separated, the straw roots and the straw stems are crushed respectively, and thus the straw can be effectively prevented from being wound together too much, and the crushing effect of the straw is ensured.

[0041] Embodiment 2: please refer to Figures 3-6 The application provides a technical scheme: a rice straw crushing and returning to field method and device, and the application makes corresponding improvements in view of the technical problems mentioned in the background art.

[0042] As a further limitation of the crushing mechanism 5 of the application, the crushing mechanism 5 comprises a protective cover 501, the upper surfaces of the two connecting frames 3 are fixedly connected with the bottom surface of the protective cover 501, the left side surface of the protective cover 501 is fixedly connected with a collecting frame 502, the inside of the collecting frame 502 is rotatably connected with an auxiliary shaft 503, the outer surface of the auxiliary shaft 503 is fixedly connected with a plurality of auxiliary rods 504, one end of the auxiliary shaft 503 is fixedly connected with a third gear 505, the outer surface of the third gear 505 is meshingly connected with the outer surface of the first gear 404, a plurality of auxiliary grooves 506 are formed in the inner bottom wall of the protective cover 501, the right side surface of the protective cover 501 is fixedly connected with three discharge covers 507, the inside of the protective cover 501 is rotatably connected with four rotating rods 508, the outer surfaces of the four rotating rods 508 are fixedly connected with a plurality of crushing knives 509, one end of each of the four rotating rods 508 is fixedly connected with a fourth gear 510, the outer surfaces of the two adjacent fourth gears 510 are meshingly connected with each other, the front surfaces of two of the fourth gears 510 are fixedly connected with a second pulley 511, the outer surfaces of the two second pulleys 511 are commonly transmissionally connected with a second belt 512, and the outer surface of one of the second pulleys 511 is transmissionally connected with a third belt 513.

[0043] The upper surface of the protective cover 501 is hingedly connected with an access door 514, the upper surface of the access door 514 is fixedly connected with a handle 515, the handle 515 can be manually pulled to open the access door 514, so that the facilities inside the protective cover 501 can be conveniently maintained, and the maintenance convenience of the device is improved.

[0044] The specific implementation of the embodiment is that: through the meshing of the third gear 505 and the first gear 404, the clockwise rotation of the first gear 404 can drive the third gear 505 and the auxiliary shaft 503 to rotate counterclockwise, and then the auxiliary rods 504 can be used to send the straw into the inside of the protective cover 501 in cooperation with the collecting frame 502, at this time, through the cooperation of the third belt 513, the second belt 512 and the second pulley 511, the two upper rotating rods 508 can be driven to rotate counterclockwise, then through the meshing of the fourth gears 510, the two lower rotating rods 508 can be driven to rotate clockwise, and then the crushing knives 509 can be used to crush the rice straw entering the inside of the protective cover 501, and the crushed straw can be discharged outward through the discharge cover 507, so that the straw rod body which is easy to be crushed can be quickly crushed into fine crushed slag, and the crushing and returning to field of the straw will not affect the subsequent seeding.

[0045] Embodiment 3: please refer to Figure 7 and Figure 8 The present application provides a technical solution: a rice straw crushing and returning to field method and device, the present application is corresponding to the improvement of the technical problems mentioned in the background technology, the lower part of the mounting frame 1 is provided with a crushing and mixing mechanism 6.

[0046] As a further limitation of the crushing and mixing mechanism 6 of the present application, the crushing and mixing mechanism 6 comprises a fixed frame 601, the bottom surfaces of the two connecting frames 3 are fixedly connected with the upper surface of the fixed frame 601, a connecting shaft 602 is rotatably connected inside the fixed frame 601, a plurality of crushing knives 603 are fixedly connected to the outer surface of the connecting shaft 602, a third pulley 604 is fixedly connected to one end of the connecting shaft 602, the inner wall of the first belt 407 and the inner wall of the third belt 513 are drivingly connected with the outer surface of the third pulley 604, a gear reversing device 605 is drivingly connected to the outer surface of the connecting shaft 602, the upper surface of the gear reversing device 605 penetrates to the upper side of the fixed frame 601, four supporting frames 606 are fixedly connected to the upper surface of the fixed frame 601, a connecting plate 607 is fixedly connected to the bottom surfaces of the four supporting frames 606, four fixed seats 608 are fixedly connected to the bottom surface of the connecting plate 607, and a plowshare 609 is fixedly connected to the front surface of each fixed seat 608.

[0047] The front surface and the back surface of the gear reversing device 605 are fixedly connected with the second reinforcing ribs 610, the other ends of the two second reinforcing ribs 610 are fixedly connected with the mutually close side surfaces of the two connecting frames 3, and the second reinforcing ribs 610 can further fix the position of the gear reversing device 605, so that the gear reversing device 605 is more stable and reliable in use.

[0048] The input end of the gear reversing device 605 is fixedly connected with a fixed shaft 611, and the left end of the fixed shaft 611 is fixedly connected with a fixed buckle 612, so that the fixed shaft 611 can be connected with the output shaft of the tractor gearbox through the fixed buckle 612, so that the tractor can smoothly drive the reversing gear inside the gear reversing device 605 to rotate when the tractor is running.

[0049] The specific implementation of the embodiment is that the plow head 609 can be used to turn up the soil in the rice field through the cooperation of the support frame 606, the connecting plate 607 and the fixing seat 608, so that the rice roots and straw in the rice field soil can be exposed smoothly, and then the power of the tractor can be transmitted to the connecting shaft 602 through the gear reversing device 605, so that the connecting shaft 602 drives the broken knife 603 to quickly crush the turned-up soil and the rice roots and straw in the soil, so that the rice roots and straw can also be effectively crushed, and excessive accumulation can be avoided, so that the rice straw roots and straw stems can be crushed separately, preventing the rice straw roots and straw stems from being directly mixed together and crushed to cause poor crushing effect of the straw, which is easy to accumulate in the soil, and further ensuring the crushing and returning effect of the rice straw.

[0050] Specifically, the rice straw crushing and returning device can work / used when:

[0051] Firstly, the device is fixed on the rear mounting frame of the tractor through the installation buckle 2, and then the fixed shaft 611 is connected with the output shaft of the tractor gearbox through the fixed buckle 612, so that the tractor can drive the connecting shaft 602 and the third pulley 604 to rotate counterclockwise through the gear reversing device 605 when the tractor runs, at this time, the third pulley 604 and the first pulley 405 can drive the second gear 406 to rotate counterclockwise through the connecting frame 3, the driving shaft 403 and the driven shaft 409, and then the first gear 404 can drive the driving shaft 403 and the conveyor belt 401 to rotate clockwise through the meshing of the second gear 406 and the first gear 404, at this time, the straw and soil inside the rice field can be separated through the collecting rod 402 on the conveyor belt 401 and the inclination angle of the conveyor belt 401 itself, so that the straw roots and straw stems can be separated and crushed, so that the straw roots and straw stems can be effectively prevented from being wound together;

[0052] Then, through the meshing of the third gear 505 and the first gear 404, the clockwise rotation of the first gear 404 can drive the third gear 505 and the auxiliary shaft 503 to rotate counterclockwise, and then the auxiliary rod 504 can send the straw on the conveying belt 401 into the protective cover 501, and the auxiliary groove 506 can prevent the protective cover 501 from affecting the normal rotation of the collecting rod 402 and the conveying belt 401. At this time, through the cooperation of the third belt 513 and the third pulley 604, the upper two rotating rods 508 can be driven to rotate counterclockwise, and then through the meshing of the fourth gear 510, the lower two rotating rods 508 can be driven to rotate clockwise, and then the crushing knife 509 can crush the rice straw entering the protective cover 501, and the crushed rice straw can be discharged outward through the discharge cover 507, so that the rice straw rod body can be quickly crushed into fine crushed slag, ensuring that the straw crushing and returning to the field will not affect the subsequent seeding;

[0053] Further, through the support frame 606 cooperating with the connecting plate 607 and the fixed seat 608, the plow 609 can lift the soil in the rice field after the conveying belt 401 picks up the rice straw rod body in the rice field, so that the rice root straw in the rice field soil can be smoothly exposed and crushed, and the crushed rice straw rod body can fall between the plow 609 and the crushing knife 603, and then the gear reversing device 605 can drive the crushing knife 603 to quickly crush the lifted soil and the rice root straw in the soil, while mixing the crushed rice straw rod body into the soil for returning to the field, so that the rice root straw can also be effectively crushed, and the uncrushed rice straw rod body can be prevented from affecting the crushing effect of the tunnel root straw, so that the rice straw will not be accumulated, and the rice straw root and the straw rod body can be crushed separately, preventing the rice straw root and the straw rod body from being directly mixed together and crushed, which can cause poor crushing effect and easy accumulation in the soil, further ensuring the crushing and returning to the field effect of the rice straw.

[0054] It should be noted that in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0055] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A method and apparatus for crushing and returning rice straw to the field, comprising a mounting frame (1), characterized in that: The upper surface of the mounting frame (1) is fixedly connected with a mounting buckle (2), and the bottom surface of the mounting frame (1) is fixedly connected with two connecting frames (3). A sorting mechanism (4) is provided above the two connecting frames (3). The sorting mechanism (4) includes a conveyor belt (401), which is positioned between the two connecting frames (3). Several collecting rods (402) are fixedly connected to the outer surface of the conveyor belt (401). A drive shaft (403) is rotatably connected inside the two connecting frames (3). The outer surface of the drive shaft (403) is in contact with the inner wall of the conveyor belt (401). A first gear (404) is fixedly connected to one end of the drive shaft (403). A first pulley (405) is rotatably connected to the front of one of the connecting frames (3). A second gear (406) is fixedly connected to the outer surface of the first pulley (405). The outer surface of the second gear (406) meshes with the outer surface of the first gear (404). A first belt (407) is drivenly connected to the outer surface of the first pulley (405). A crushing mechanism (5) is fixedly installed on the upper surface of the sorting mechanism (4). The crushing mechanism (5) includes a protective cover (501). The upper surfaces of the two connecting frames (3) are fixedly connected to the bottom surface of the protective cover (501). A collection frame (502) is fixedly connected to the left side of the protective cover (501). An auxiliary shaft (503) is rotatably connected inside the collection frame (502). Several auxiliary rods (504) are fixedly connected to the outer surface of the auxiliary shaft (503). A third gear (505) is fixedly connected to one end of the auxiliary shaft (503). The outer surface of the third gear (505) meshes with the outer surface of the first gear (404). Several auxiliary grooves (506) are opened in the inner bottom wall of the protective cover (501). The protective cover (501) has three discharge covers (507) fixedly connected to its right side. The protective cover (501) has four rotating rods (508) rotatably connected inside. The outer surfaces of the four rotating rods (508) are fixedly connected to several crushing blades (509). One end of each of the four rotating rods (508) is fixedly connected to a fourth gear (510). The outer surfaces of two adjacent fourth gears (510) mesh with each other. The front sides of the two fourth gears (510) are fixedly connected to second pulleys (511). The outer surfaces of the two second pulleys (511) are connected to a second belt (512) for transmission. The outer surface of one of the second pulleys (511) is connected to a third belt (513) for transmission. A crushing and mixing mechanism (6) is provided below the mounting frame (1). The crushing and mixing mechanism (6) includes a fixed frame (601). The bottom surfaces of the two connecting frames (3) are fixedly connected to the upper surface of the fixed frame (601). A connecting shaft (602) is rotatably connected inside the fixed frame (601). Several crushing blades (603) are fixedly connected to the outer surface of the connecting shaft (602). A third pulley (604) is fixedly connected to one end of the connecting shaft (602). The inner walls of the first belt (407) and the third belt (513) are both connected to the third belt. The outer surface of the pulley (604) is connected to the transmission, and the outer surface of the connecting shaft (602) is connected to the transmission of the gear commutator (605). The upper surface of the gear commutator (605) extends through to the top of the fixed frame (601). The upper surface of the fixed frame (601) is fixedly connected to four support frames (606). The bottom surfaces of the four support frames (606) are all fixedly connected to a connecting plate (607). The bottom surface of the connecting plate (607) is fixedly connected to four fixed seats (608). The front of each fixed seat (608) is fixedly connected to a plowshare (609).

2. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The upper surfaces of the two connecting frames (3) are fixedly connected with first reinforcing ribs (408), and the other ends of the two first reinforcing ribs (408) are fixedly connected to the right side of the mounting frame (1).

3. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The two connecting frames (3) are rotatably connected to a driven shaft (409), and the outer surface of the driven shaft (409) is in contact with the inner wall of the conveyor belt (401).

4. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The bottom surfaces of the two connecting frames (3) are fixedly connected to auxiliary frames (410), and the bottom surfaces of the two auxiliary frames (410) are rotatably connected to two rollers (411).

5. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The upper surface of the protective cover (501) is hinged to an inspection door (514) via a hinge, and a handle (515) is fixedly connected to the upper surface of the inspection door (514).

6. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The gear commutator (605) has a second reinforcing rib (610) fixedly connected to both the front and back sides. The other ends of the two second reinforcing ribs (610) are fixedly connected to the sides of the two connecting frames (3) that are close to each other.

7. The method and apparatus for crushing and returning rice straw to the field according to claim 1, characterized in that: The input end of the gear commutator (605) is fixedly connected to a fixed shaft (611), and the left end of the fixed shaft (611) is fixedly connected to a fixing buckle (612).

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