A straw returning machine

Abstract

The present invention relates to the technical field of agricultural machinery, specifically a straw return machine, comprising a casing, a diffusion component and an adjustment component, wherein a ground roller is provided at the outlet of the casing, and a diffusion component is provided at the outlet of the left end of the casing, a first rotating rod is symmetrically provided in the casing, the front end of the first rotating rod passes through the casing, and a first bearing fixedly connected to the casing is symmetrically provided on the first rotating rod, the first rotating rod is provided with a crushing roller, and the crushing roller is provided with a plurality of crushing blades through the adjustment component. When the present invention is used, the crushing roller and the crushing blade are conveniently driven to rotate by the provided rotating component, thereby crushing the straw, and the spacing of the crushing blades is conveniently adjusted by the provided adjustment component, so as to facilitate adjusting the spacing between the crushing blades according to the straw characteristics of different crops such as corn and rice, adapting to the needs of different crops, avoiding uneven straw crushing effects, and at the same time facilitating the replacement of the crushing blades.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a straw returning machine. Background Art

[0002] Straw return to the field is a method of applying straw that is not suitable for direct feed (corn straw, sorghum straw, etc.) directly or after it has been piled up and composted into the soil. Straw return to the field has the advantages of promoting the increase of soil organic matter and nitrogen, phosphorus, potassium and other content; improving soil moisture retention capacity; improving plant traits and increasing crop yields; improving soil properties and increasing aggregate structure. Straw return to the field has a significant effect on increasing fertilizer and yield, generally increasing yield by 5% to 10%. However, achieving such an effect is not easy. Therefore, taking reasonable straw return measures can achieve a good return effect. Straw return to the field is a soil fertility and yield increase measure that is widely valued in the world today. While eliminating the air pollution caused by straw burning, it also has the effect of increasing fertilizer and yield.

[0003] Existing straw returners often have fixed shredder blades, lacking specialized designs tailored to the straw characteristics (such as length and toughness) of crops like corn and rice. This results in uneven shredding performance, and the blades are easily entangled by straw during shredding, causing blockage. Therefore, the present invention provides a straw returner to address the aforementioned issues. Summary of the Invention

[0004] The purpose of the present invention is to provide a straw return machine to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A straw returner comprises a casing, a diffusion assembly and an adjustment assembly, wherein a ground roller is provided at the casing outlet, and a diffusion assembly is provided at the left end outlet of the casing, a first rotating rod is symmetrically provided in the casing, the front end of the first rotating rod passes through the casing, and a first bearing fixedly connected to the casing is symmetrically provided on the first rotating rod front and back, a crushing roller is provided on the first rotating rod, and a plurality of crushing blades are provided on the crushing roller through the adjustment assembly, and the crushing blades on the two crushing rollers are staggered, a rotating assembly is provided on the casing corresponding to the first rotating rod, and a cleaning assembly is provided on the first rotating rod corresponding to the crushing blade.

[0007] As a further solution of the present invention, the diffusion assembly includes a horizontal plate and a material guide plate. A horizontal plate is provided in the casing, and several material guide plates are symmetrically attached to the front and back lower ends of the horizontal plate. A second rotating rod is provided on the upper end of the material guide plate, which passes through the horizontal plate. A third bearing is provided on the second rotating rod, and the lower end of the third bearing is fixedly connected to the horizontal plate. The range of the straw powder spraying can be adjusted by setting the material guide plate to avoid uneven spraying of the straw powder in the field.

[0008] As a further solution of the present invention, a third gear is provided at the upper end of the second rotating rod, the right end of the third gear on the front side is meshed with the first rack, and the lower end of the first rack is provided with a first limit plate, the first limit plate is slidably connected to the cross plate, and the upper end of the cross plate is provided with a first limit groove corresponding to the first limit plate, and the left end of the third gear on the rear side is meshed with the second rack, and the lower end of the second rack is provided with a second limit plate, the second limit plate is slidably connected to the cross plate, and the upper end of the cross plate is provided with a second limit groove corresponding to the second limit plate, and the first rack and the second rack are moved closer to or away from each other, so that the first rack and the second rack drive the third gear, the second rotating rod and the guide plate to rotate, thereby adjusting the inclination angle of the guide plate to change the angle of the straw powder spraying, thereby adjusting the range of the straw powder spraying.

[0009] As a further solution of the present invention, a fourth gear is engaged between the first rack and the second rack, a second rotating shaft is provided at the upper end of the fourth gear, a second motor is provided at the upper end of the second rotating shaft, and a second mounting bracket fixedly connected to the cross plate is provided on the second motor. By starting the second motor to drive the second rotating shaft and the fourth gear to rotate, the fourth gear drives the first rack and the second rack to move closer to or away from each other.

[0010] As a further solution of the present invention, the adjustment assembly includes a moving block, a mounting block, a mounting slot and a locking bolt. The crushing roller is provided with a number of slide grooves corresponding to the crushing blades, and a number of moving blocks are provided in the slide grooves corresponding to the crushing blades. The crushing blade is provided with a mounting block at one end close to the moving block, and the mounting block is clamped with the moving block. The corresponding mounting block on the moving block is provided with a mounting slot, and the corresponding mounting block on the moving block is provided with a locking bolt. The sliding slot structure is provided to facilitate the sliding of the moving block, thereby facilitating the adjustment of the spacing between the crushing blades, and the crushing blades can be replaced by rotating the locking bolt structure.

[0011] As a further solution of the present invention, a threaded rod is provided in the slide groove, the threaded rod passes through the moving block, the threaded rod is threadedly connected to the moving block, a fourth bearing is provided at the rear end of the threaded rod, the rear end of the fourth bearing is fixedly connected to the inner wall of the slide groove, the front end of the threaded rod passes through the crushing roller, a fifth gear is provided at the front end of the threaded rod, an outer gear ring is meshed between the fifth gears, a support ring is provided at one end of the outer gear ring close to the crushing roller, a fifth bearing fixedly connected to the crushing roller is provided on the support ring, and the outer gear ring is rotated to drive the fifth gear and the threaded rod to rotate, and the threaded rod drives the moving block and the crushing blade to move synchronously, so as to facilitate the adjustment of the spacing between the crushing blades according to the straw characteristics of different crops such as corn and rice, adapt to the needs of different crops, and avoid uneven straw crushing effects.

[0012] As a further solution of the present invention, the outer gear ring is engaged with a sixth gear, a third rotating shaft is provided at the front end of the sixth gear, a third motor is provided at the front end of the third rotating shaft, and a third mounting frame fixedly connected to the crushing roller is provided at the front end of the third motor. By starting the third motor, the third rotating shaft and the sixth gear are driven to rotate, and the sixth gear thereby drives the outer gear ring to rotate.

[0013] As a further solution of the present invention, the cleaning component includes a groove, a second bearing, an air inlet pipe and an air outlet. A groove is provided at the front end of the first rotating rod, and a plurality of air outlets are provided on the inner wall of the groove corresponding to the crushing blade, and the air outlets pass through the crushing roller. A second bearing is provided on the inner wall of the groove, and an air inlet pipe is provided on the inner wall of the second bearing. When the crushing blade is crushing, external gas is input into the groove through the air inlet pipe and then quickly ejected through the air outlet. The ejected gas facilitates the cleaning of the crushing blade and prevents the crushing blade from being entangled by straw.

[0014] As a further solution of the present invention, the rotating assembly includes a first gear, a second gear, a first rotating shaft, a first motor and a first mounting bracket. The first rotating rod is provided with a first gear, the two first gears are meshed with each other, the right end of the rightmost first gear is meshed with the second gear, the front end of the second gear is provided with a first rotating shaft, the front end of the first rotating shaft is provided with a first motor, and the front end of the first motor is provided with a first mounting bracket fixedly connected to the casing. By starting the first motor, the first rotating shaft and the second gear are driven to rotate, and the second gear thereby drives the first gear and the first rotating rod to rotate, and the first rotating rod thereby drives the crushing roller and the crushing blade to rotate, thereby crushing the straw.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is used, the provided rotating assembly facilitates the rotation of the crushing roller and the crushing blades, thereby crushing the straw. The provided adjusting assembly facilitates the adjustment of the spacing between the crushing blades, thereby facilitating the adjustment of the spacing between the crushing blades according to the straw characteristics of different crops such as corn and rice, adapting to the needs of different crops, avoiding uneven straw crushing effects, and facilitating the replacement of the crushing blades.

[0017] 2. When the present invention is used, when the crushing blade is crushing, the provided cleaning component facilitates cleaning of the crushing blade to prevent the crushing blade from being entangled by straw.

[0018] 3. When the present invention is used, after the straw is crushed, the crushed straw is sprayed out through the outlet of the casing. The diffusion component is provided to facilitate adjustment of the spraying range of the straw powder to prevent the straw powder from falling unevenly on the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1The figure is a structural diagram of a straw return machine.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of a straw return machine.

[0021] Figure 3 A straw return machine Figure 2 Schematic diagram of the cross-sectional structure of the moving block.

[0022] Figure 4 This is a schematic diagram of the structure of the diffusion component in a straw return machine.

[0023] Figure 5 A straw return machine Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 6 A straw return machine Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0025] Figure 7 A straw return machine Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0026] In the figure: 1, housing; 2, ground roller; 3, first rotating rod; 301, first bearing; 4, crushing roller; 5, crushing blade; 6, rotating assembly; 601, first gear; 602, second gear; 603, first rotating shaft; 604, first motor; 605, first mounting bracket; 7, cleaning assembly; 701, groove; 702, second bearing; 703, air inlet pipe; 704, air outlet; 8, diffusion assembly; 801, horizontal plate; 802, guide plate; 803, second rotating rod; 804, third bearing; 805, third gear; 806, first rack; 807, first limit plate; 808, First limiting groove; 809, second rack; 810, second limiting plate; 811, second limiting groove; 812, fourth gear; 813, second rotating shaft; 814, second motor; 815, second mounting bracket; 9, adjustment assembly; 901, moving block; 902, mounting block; 903, mounting groove; 904, locking bolt; 905, slide groove; 906, threaded rod; 907, fourth bearing; 908, fifth gear; 909, outer gear ring; 910, support ring; 911, fifth bearing; 912, sixth gear; 913, third rotating shaft; 914, third motor; 915, third mounting bracket. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In the present invention, the word "exemplary" is used to mean "serving as an example, illustration or description". Any embodiment described in the present invention as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed herein.

[0029] Example

[0030] See also Figures 1 to 7 In an embodiment of the present invention, a straw return machine includes a casing 1, a diffusion component 8 and an adjustment component 9. A ground roller 2 is provided at the outlet of the casing 1, and a diffusion component 8 is provided at the outlet of the left end of the casing 1. A first rotating rod 3 is symmetrically provided in the casing 1. The front end of the first rotating rod 3 passes through the casing 1, and the first rotating rod 3 is symmetrically provided with a first bearing 301 fixedly connected to the casing 1 front and back. A crushing roller 4 is provided on the first rotating rod 3, and a plurality of crushing blades 5 are provided on the crushing roller 4 through the adjustment component 9, and the crushing blades 5 on the two crushing rollers 4 are staggered. A rotating component 6 is provided on the casing 1 corresponding to the first rotating rod 3, and a cleaning component 7 is provided on the first rotating rod 3 corresponding to the crushing blades 5.

[0031] Specifically, the rotating component 6 is provided to facilitate the rotation of the crushing roller 4 and the crushing blade 5, thereby crushing the straw. The adjusting component 9 is provided to facilitate the adjustment of the spacing of the crushing blades 5, so as to facilitate the adjustment of the spacing between the crushing blades 5 according to the straw characteristics of different crops such as corn and rice, adapt to the needs of different crops, avoid uneven straw crushing effects, and at the same time facilitate the replacement of the crushing blades 5. When the crushing blades 5 are crushing, the cleaning component 7 is provided to facilitate the cleaning of the crushing blades 5 to avoid the crushing blades 5 being entangled by the straw. When the straw crushing is completed, the crushed straw is ejected through the outlet of the casing 1. The diffusion component 8 is provided to facilitate the adjustment of the range of straw powder spraying to avoid uneven straw powder spraying in the field.

[0032] The diffusion assembly 8 includes a horizontal plate 801 and a guide plate 802. The horizontal plate 801 is provided in the housing 1. Several guide plates 802 are symmetrically attached to the lower end of the horizontal plate 801. The upper end of the guide plate 802 is provided with a second rotating rod 803 that passes through the horizontal plate 801. The second rotating rod 803 is provided with a third bearing 804. The lower end of the third bearing 804 is fixedly connected to the horizontal plate 801.

[0033] Specifically, the guide plate 802 can be used to adjust the spraying range of the straw powder, thereby preventing the straw powder from being sprayed unevenly on the field.

[0034] A third gear 805 is provided at the upper end of the second rotating rod 803, and the right end of the third gear 805 on the front side is engaged with the first rack 806, and a first limiting plate 807 is provided at the lower end of the first rack 806. The first limiting plate 807 is slidably connected to the horizontal plate 801, and a first limiting groove 808 is provided at the upper end of the horizontal plate 801 corresponding to the first limiting plate 807. The left end of the third gear 805 on the rear side is engaged with the second rack 809, and a second limiting plate 810 is provided at the lower end of the second rack 809. The second limiting plate 810 is slidably connected to the horizontal plate 801, and a second limiting groove 811 is provided at the upper end of the horizontal plate 801 corresponding to the second limiting plate 810.

[0035] Specifically, by moving the first rack 806 and the second rack 809 toward or away from each other, the first rack 806 and the second rack 809 drive the third gear 805, the second rotating rod 803 and the guide plate 802 to rotate, thereby adjusting the inclination angle of the guide plate 802 to change the angle of the straw powder spraying, thereby adjusting the range of the straw powder spraying.

[0036] The first rack 806 and the second rack 809 are meshed with a fourth gear 812 . A second rotating shaft 813 is provided on the upper end of the fourth gear 812 . A second motor 814 is provided on the upper end of the second rotating shaft 813 . A second mounting bracket 815 fixedly connected to the horizontal plate 801 is provided on the second motor 814 .

[0037] Specifically, by starting the second motor 814 to drive the second rotating shaft 813 and the fourth gear 812 to rotate, the fourth gear 812 drives the first rack 806 and the second rack 809 to move toward or away from each other.

[0038] The adjustment assembly 9 includes a moving block 901, a mounting block 902, a mounting slot 903 and a locking bolt 904. The crushing roller 4 is provided with a plurality of sliding slots 905 corresponding to the crushing blade 5. The sliding slots 905 are provided with a plurality of moving blocks 901 corresponding to the crushing blade 5. The crushing blade 5 is provided with a mounting block 902 at one end close to the moving block 901. The mounting block 902 is snap-connected with the moving block 901. A mounting slot 903 is provided on the moving block 901 corresponding to the mounting block 902, and a locking bolt 904 is provided on the moving block 901 corresponding to the mounting block 902.

[0039] Specifically, the sliding groove 905 structure is provided to facilitate the sliding of the moving block 901, thereby facilitating the adjustment of the spacing between the crushing blades 5, and the crushing blades 5 can be easily replaced by rotating the locking bolt 904 structure.

[0040] A threaded rod 906 is provided in the slide groove 905, and the threaded rod 906 passes through the moving block 901. The threaded rod 906 is threadedly connected to the moving block 901. The rear end of the threaded rod 906 is provided with a fourth bearing 907, and the rear end of the fourth bearing 907 is fixedly connected to the inner wall of the slide groove 905. The front end of the threaded rod 906 passes through the crushing roller 4, and the front end of the threaded rod 906 is provided with a fifth gear 908. The fifth gear 908 is meshed with an outer gear ring 909. The outer gear ring 909 is provided with a support ring 910 at one end close to the crushing roller 4, and the support ring 910 is provided with a fifth bearing 911 fixedly connected to the crushing roller 4.

[0041] Specifically, the outer gear ring 909 rotates, which drives the fifth gear 908 and the threaded rod 906 to rotate, and the threaded rod 906 drives the moving block 901 and the crushing blade 5 to move synchronously, thereby facilitating the adjustment of the spacing between the crushing blades 5 according to the straw characteristics of different crops such as corn and rice, adapting to the needs of different crops, and avoiding uneven straw crushing effects.

[0042] The outer gear ring 909 is engaged with a sixth gear 912 , a third rotating shaft 913 is provided at the front end of the sixth gear 912 , a third motor 914 is provided at the front end of the third rotating shaft 913 , and a third mounting frame 915 fixedly connected to the crushing roller 4 is provided at the front end of the third motor 914 .

[0043] Specifically, by starting the third motor 914 to drive the third rotating shaft 913 and the sixth gear 912 to rotate, the sixth gear 912 thereby drives the outer gear ring 909 to rotate.

[0044] The cleaning assembly 7 includes a groove 701, a second bearing 702, an air inlet pipe 703 and an air outlet 704. The front end of the first rotating rod 3 is provided with a groove 701, and the inner wall of the groove 701 is provided with a plurality of air outlet holes 704 corresponding to the crushing blade 5, and the air outlet holes 704 pass through the crushing roller 4. The inner wall of the groove 701 is provided with a second bearing 702, and the inner wall of the second bearing 702 is provided with an air inlet pipe 703.

[0045] Specifically, when the crushing blade 5 is crushing, external air is input into the groove 701 through the air inlet pipe 703 and then quickly ejected through the air outlet 704. The ejected air is convenient for cleaning the crushing blade 5 and preventing the crushing blade 5 from being entangled by straw.

[0046] The rotating assembly 6 includes a first gear 601, a second gear 602, a first rotating shaft 603, a first motor 604 and a first mounting bracket 605. The first rotating rod 3 is provided with a first gear 601, and the two first gears 601 are meshed with each other. The right end of the first gear 601 on the far right is meshed with the second gear 602. The front end of the second gear 602 is provided with a first rotating shaft 603, the front end of the first rotating shaft 603 is provided with a first motor 604, and the front end of the first motor 604 is provided with a first mounting bracket 605 fixedly connected to the housing 1.

[0047] Specifically, by starting the first motor 604, the first shaft 603 and the second gear 602 are driven to rotate, and the second gear 602 drives the first gear 601 and the first rotating rod 3 to rotate, and the first rotating rod 3 drives the crushing roller 4 and the crushing blade 5 to rotate, thereby crushing the straw.

[0048] The working principle of the present invention is:

[0049] When the present invention is in use, the first motor 604 is started to drive the first rotating shaft 603 and the second gear 602 to rotate, and the second gear 602 thereby drives the first gear 601 and the first rotating rod 3 to rotate, and the first rotating rod 3 thereby drives the crushing roller 4 and the crushing blade 5 to rotate, thereby crushing the straw. When the crushing blade 5 needs to be replaced, the crushing blade 5 is easily replaced by rotating the locking bolt 904 structure, and the operation is simple. When the spacing between the crushing blades 5 needs to be adjusted, the third motor 914 is started to drive the third rotating shaft 913 and the sixth gear 912 to rotate, and the sixth gear 912 thereby drives the outer gear ring 909 to rotate, and the outer gear ring 909 thereby drives the fifth gear 908 and the threaded rod 906 to rotate, and the threaded rod 906 thereby drives the moving block 901 and the crushing blade 5 to move synchronously, thereby facilitating the adjustment of the spacing between the crushing blades 5 according to the straw characteristics of different crops such as corn and rice, adapting to the needs of different crops, and avoiding inconsistent straw crushing effects. The outer ring 704 of the casing 1 is provided with an air inlet 703, and the air inlet 703 is passed through the air outlet 704, and the air inlet 703 is passed through the air outlet 704 to clean the crushing blade 5 and prevent the crushing blade 5 from being entangled by the straw. When the straw is crushed, the crushed straw is ejected through the outlet of the casing 1. The range of the straw powder ejection can be adjusted by the provided guide plate 802 to prevent the straw powder from being ejected unevenly in the field. When the ejection range needs to be adjusted, the second motor 814 is started to drive the second rotating shaft 813 and the fourth gear 812 to rotate. The fourth gear 812 drives the first rack 806 and the second rack 809 to move closer to or away from each other. The first rack 806 and the second rack 809 drive the third gear 805, the second rotating rod 803 and the guide plate 802 to rotate, thereby adjusting the inclination angle of the guide plate 802 to change the angle of the straw powder ejection, thereby adjusting the range of the straw powder ejection.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A straw return machine, comprising a housing (1), a diffusion component (8) and an adjustment component (9), characterized in that: The housing (1) is provided with a ground roller (2) at the outlet, and a diffusion component (8) is provided at the left end outlet of the housing (1). A first rotating rod (3) is symmetrically provided in the housing (1). The front end of the first rotating rod (3) passes through the housing (1), and a first bearing (301) fixedly connected to the housing (1) is symmetrically provided on the first rotating rod (3). The first rotating rod (3) is provided with a crushing roller (4). The crushing roller (4) is provided with a plurality of crushing blades (5) through an adjustment component (9), and the crushing blades (5) on the two crushing rollers (4) are staggered. The housing (1) is provided with a rotating component (6) corresponding to the first rotating rod (3), and a cleaning component (7) is provided on the first rotating rod (3) corresponding to the crushing blades (5). The diffusion assembly (8) includes a transverse plate (801) and a guide plate (802). The housing (1) is provided with a transverse plate (801). A plurality of guide plates (802) are symmetrically attached to the lower end of the transverse plate (801). The upper end of the guide plate (802) is provided with a second rotating rod (803) that passes through the transverse plate (801). The second rotating rod (803) is provided with a third bearing (804). The lower end of the third bearing (804) is fixedly connected to the transverse plate (801). A third gear (805) is provided at the upper end of the second rotating rod (803), the right end of the third gear (805) on the front side is engaged with the first rack (806), the lower end of the first rack (806) is provided with a first limiting plate (807), the first limiting plate (807) is slidably connected to the transverse plate (801), and the upper end of the transverse plate (801) is provided with a first limiting groove (808) corresponding to the first limiting plate (807), the left end of the third gear (805) on the rear side is engaged with the second rack (809), the lower end of the second rack (809) is provided with a second limiting plate (810), the second limiting plate (810) is slidably connected to the transverse plate (801), and the upper end of the transverse plate (801) is provided with a second limiting groove (811) corresponding to the second limiting plate (810); The cleaning assembly (7) comprises a groove (701), a second bearing (702), an air inlet pipe (703) and an air outlet hole (704). The front end of the first rotating rod (3) is provided with a groove (701). The inner wall of the groove (701) is provided with a plurality of air outlet holes (704) corresponding to the crushing blades (5), and the air outlet holes (704) penetrate the crushing roller (4). The inner wall of the groove (701) is provided with a second bearing (702), and the inner wall of the second bearing (702) is provided with an air inlet pipe (703).

2. A straw returning machine according to claim 1, characterized in that: A fourth gear (812) is meshed between the first rack (806) and the second rack (809), a second rotating shaft (813) is provided at the upper end of the fourth gear (812), a second motor (814) is provided at the upper end of the second rotating shaft (813), and a second mounting frame (815) fixedly connected to the transverse plate (801) is provided on the second motor (814).

3. The straw returning machine according to claim 1, characterized in that: The adjustment assembly (9) comprises a moving block (901), a mounting block (902), a mounting groove (903) and a locking bolt (904); a plurality of chute grooves (905) are provided on the crushing roller (4) corresponding to the crushing blades (5); a plurality of moving blocks (901) are provided in the chute grooves (905) corresponding to the crushing blades (5); a mounting block (902) is provided at one end of the crushing blades (5) close to the moving block (901); the mounting block (902) is engaged with the moving block (901); a mounting groove (903) is provided on the moving block (901) corresponding to the mounting block (902); and a locking bolt (904) is provided on the moving block (901) corresponding to the mounting block (902).

4. A straw returning machine according to claim 3, characterized in that: A threaded rod (906) is provided in the chute (905), the threaded rod (906) passes through the moving block (901), the threaded rod (906) is threadedly connected to the moving block (901), a fourth bearing (907) is provided at the rear end of the threaded rod (906), the rear end of the fourth bearing (907) is fixedly connected to the inner wall of the chute (905), the front end of the threaded rod (906) passes through the crushing roller (4), a fifth gear (908) is provided at the front end of the threaded rod (906), an outer gear ring (909) is meshed between the fifth gear (908), a support ring (910) is provided at one end of the outer gear ring (909) close to the crushing roller (4), and a fifth bearing (911) fixedly connected to the crushing roller (4) is provided on the support ring (910).

5. The straw returning machine according to claim 4, characterized in that: The outer gear ring (909) is meshed with a sixth gear (912), a third rotating shaft (913) is provided at the front end of the sixth gear (912), a third motor (914) is provided at the front end of the third rotating shaft (913), and a third mounting frame (915) fixedly connected to the crushing roller (4) is provided at the front end of the third motor (914).

6. The straw returning machine according to claim 1, characterized in that: The rotating assembly (6) comprises a first gear (601), a second gear (602), a first rotating shaft (603), a first motor (604) and a first mounting bracket (605). The first rotating rod (3) is provided with a first gear (601), two first gears (601) are meshed with each other, the right end of the rightmost first gear (601) is meshed with the second gear (602), a first rotating shaft (603) is provided at the front end of the second gear (602), a first rotating shaft (603) is provided at the front end of the first rotating shaft (603), and a first mounting bracket (605) fixedly connected to the housing (1) is provided at the front end of the first motor (604).

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