Adjustable mulch machine with multi-stage crushing structure

Abstract

The application relates to the technical field of agricultural machinery, and discloses an adjustable still-furrow machine with a multi-stage crushing structure, which comprises a machine shell, a gear box and a suspension mechanism fixedly arranged on the machine shell, a drag roller arranged on the side, away from the suspension mechanism, of the machine shell, connecting arms rotatably arranged at the two ends of the drag roller, connecting pins for rotatably connecting the connecting arms with the machine shell, and a positioning pin arranged at the end, away from the drag roller, of each connecting arm; the still-furrow machine further comprises a crushing roller, a power transmission assembly and a first cutting assembly; the crushing roller is rotatably arranged in the machine shell; a plurality of knife holders are arranged at intervals on the crushing roller; a crushing knife is rotatably arranged on each knife holder; the power transmission assembly is arranged on the machine shell; and the first cutting assembly is arranged at the bottom of the machine shell. Through the technical scheme, the problem that long straw is easy to be wound around the crushing roller when straw with different lengths and different tenacities is treated, the crushing knives are easy to be damaged, and the working load is increased is solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to an adjustable pulverizing machine with a multi-stage crushing structure. Background Technology

[0002] A straw-returning machine is an agricultural machine that crushes crop straw and evenly spreads it in the field or buries it in the soil. Through mechanized operation, it returns straw to the field in situ, increasing soil organic matter content, improving soil structure, and reducing environmental pollution from burning. In actual use, the straw-returning machine is attached to the back of a tractor, and then driven to rotate. As the tractor moves, the machine crushes the straw and evenly spreads it in the field or buries it in the soil.

[0003] In existing technologies, the main structure of a common straw pulverizer typically includes a casing, a suspension frame, a transmission system, and a crushing device. The casing is the main body of the machine, and the suspension frame is mounted on the casing for connection to the tractor. A drag roller is usually installed on the rear side of the casing to adjust the machine's working posture. Inside the casing is a crushing roller with rotating crushing blades. In actual application, the tractor's power take-off shaft transmits power to the straw pulverizer's gearbox, which drives the crushing roller to rotate through the transmission components. The crushing roller drives the crushing blades to rotate together, thereby striking and crushing the straw entering the machine through the high-speed swinging crushing blades.

[0004] However, when processing straw of varying lengths and toughness, long straws are prone to tangling during the crushing process. This not only affects the crushing effect but also easily leads to deformation and damage of the crushing blades, thus affecting the normal crushing process. Furthermore, the uneven length of the straws can easily cause unstable force on the crushing blades during the cutting process. When encountering longer, tougher straws, greater cutting force is required, while the load decreases sharply when encountering shorter fragments. This frequent fluctuation in load not only increases power consumption but also affects the stability of the machine's operation and increases the risk of blade wear. Summary of the Invention

[0005] This invention proposes an adjustable straw return machine with a multi-stage crushing structure to solve the problem in the prior art that long straws are prone to getting tangled in the crushing rollers when processing straws of different lengths and toughnesses, which not only damages the crushing blades but also increases the workload.

[0006] The technical solution of the present invention is as follows: An adjustable pulverizing machine with a multi-stage crushing structure includes a housing, on which a gearbox and a suspension mechanism are fixedly mounted. A drag roller is mounted on the side of the housing away from the suspension mechanism. Connecting arms are rotatably mounted at both ends of the drag roller. The connecting arms are rotatably connected to the housing via connecting pins. A positioning pin is mounted at the end of the connecting arm away from the drag roller. Several positioning holes are equally spaced in an arc shape on both sides of the housing, centered on the connecting pin. The positioning holes are adapted to the positioning pins. The machine also includes: A crushing roller is rotatably disposed inside the machine housing. Several blade holders are arranged at intervals on the crushing roller, and a crushing blade is rotatably disposed on each blade holder. A main shaft is rotatably mounted on the gearbox, and a drive helical gear is fixedly mounted at one end of the main shaft located inside the gearbox; A power transmission assembly, which is disposed on the housing, is used to transmit power to the crushing roller and drive the crushing roller to rotate; A primary cutting assembly is disposed at the bottom of the machine housing and located on the side of the crushing roller away from the drag roller, for cutting the straw before crushing.

[0007] To drive the crushing roller to rotate, the power transmission assembly includes: A transmission housing is fixedly disposed outside the machine housing, and a transmission shaft is rotatably disposed between the transmission housing and the gearbox; A transmission helical gear is rotatably mounted inside the gearbox. The transmission helical gear meshes with the driving helical gear and is fixedly connected to one end of the transmission shaft.

[0008] The transmission housing contains two pulleys that are rotatably mounted inside. A transmission belt is tensioned between the two pulleys. One of the pulleys is fixedly connected to the end of the transmission shaft away from the transmission helical gear, and the other pulley is fixedly connected to the crushing roller.

[0009] To perform preliminary cutting of the material before the shredder contacts the material to be shredded, the primary cutting assembly includes: An assembly crossbeam is fixedly mounted on the machine housing and is located on the side of the crushing roller away from the drag roller. A drive shaft is rotatably disposed inside the assembly crossbeam; The assembly bracket is provided with a plurality of assembly brackets spaced apart at the bottom of the assembly cross frame; The cutting mechanism is provided inside each of the assembly brackets, and is used to initially cut the material before the crushing blade contacts the material; A transmission mechanism is provided between the assembly crossbeam and the gearbox to drive the drive shaft to rotate.

[0010] To cut the material, the cutting mechanism includes: A rotating sleeve is rotatably disposed inside each of the assembly brackets, and an annular inclined groove is formed on the inner wall of the rotating sleeve; A reciprocating slider is slidably disposed on each of the assembly brackets. The reciprocating slider is slidably engaged with the rotating sleeve. A positioning block is fixedly disposed on the reciprocating slider, and the positioning block is adapted to the annular inclined groove. A reciprocating cutter is provided at the bottom of each of the reciprocating sliders.

[0011] Each of the assembly brackets is symmetrically and fixedly provided with a fixed cutter at its bottom, and the fixed cutter is slidably adapted to the reciprocating cutter at the corresponding position.

[0012] Furthermore, both the fixed cutter and the reciprocating cutter have a number of cutting grooves spaced apart at their blade positions.

[0013] Furthermore, it also includes a first helical gear and a second helical gear. Each of the assembly brackets is rotatably provided with a first helical gear on its top. The first helical gear is coaxially and fixedly connected to the corresponding rotating sleeve through a universal coupling. Several second helical gears are spaced apart and fixedly provided on the drive shaft. The several second helical gears correspond one-to-one with and mesh with several first helical gears.

[0014] In order to drive the drive shaft to rotate simultaneously with the rotation of the crushing roller, the transmission mechanism includes: A transmission frame is fixedly mounted at the bottom of the gearbox, and two drive gears are rotatably mounted inside the transmission frame, the two drive gears meshing with each other; A driven helical gear is rotatably disposed inside the gearbox, and the driven helical gear meshes with the driving helical gear; The third helical gear and the fourth helical gear are coaxially fixed on the drive shaft, and the fourth helical gear is rotatably arranged inside the assembly crossbeam. The fourth helical gear is meshed with the third helical gear. The driven helical gear is fixedly connected to one of the driving gears via a connecting rod, and the fourth helical gear is fixedly connected to the other driving gear via a driving shaft.

[0015] The working principle and beneficial effects of this invention are as follows: 1. In this invention, during operation, the straw first enters the cutting area. Driven by the rotating sleeve and the annular inclined groove, the reciprocating cutter forms a shearing engagement with the fixed cutter, pre-cutting the long straw into short segments. After the short straw segments enter the crushing roller area, they are less likely to get tangled on the crushing roller or crushing blade, thereby reducing the probability of tangling and clogging, reducing the frequency of downtime for cleaning, and improving the reliability of operation.

[0016] 2. In this invention, the reciprocating cutter and the fixed cutter form a shearing combination, which is more labor-saving than the simple chopping method. Both the reciprocating cutter and the fixed cutter have cutting grooves at intervals, which can cut the straw, prevent the straw from slipping during the shearing process, improve the cutting efficiency, and the cut produced by the shearing method is neater than that produced by the chopping method, which is beneficial to the further operation of the subsequent crushing blade. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another angle in this invention; Figure 3 This is a schematic diagram of the overall structure from another angle in this invention; Figure 4 This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the structure of the roller, connecting arm, connecting pin, positioning pin and positioning hole in this invention. Figure 6 This is a cross-sectional view of the interaction between the crushing roller and the power transmission assembly in this invention. Figure 7 This is a cross-sectional view of the primary cutting component in this invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the local structure at point A; Figure 9 This is a cross-sectional view of the cooperation between the drive shaft and the cutting mechanism in this invention. Figure 10 This is a cross-sectional view of the cutting mechanism in this invention; Figure 11 This is a schematic cross-sectional view of the disassembled cutting mechanism in this invention; Figure 12 This is a cross-sectional view of the rotating sleeve and the internal annular groove in this invention.

[0019] In the diagram: 1. Housing; 2. Gearbox; 3. Suspension mechanism; 4. Drag roller; 5. Connecting arm; 6. Connecting pin; 7. Positioning pin; 8. Positioning hole; 9. Crushing roller; 10. Blade holder; 11. Crushing blade; 12. Main shaft; 13. Drive helical gear; 101. Transmission housing; 102. Transmission shaft; 103. Transmission helical gear; 104. Pulley; 105. Transmission belt; 201. Assembly crossbeam; 202. Drive shaft; 203. Assembly bracket; 204. Rotating sleeve; 205. Annular inclined groove; 206. Reciprocating slider; 207. Positioning block; 208. Reciprocating cutter; 209. Fixed cutter; 210. Cutting groove; 211. First helical gear; 212. Second helical gear; 213. Transmission frame; 214. Drive gear; 215. Driven helical gear; 216. Third helical gear; 217. Fourth helical gear; 218. Connecting rod; 219. Drive shaft; 220. Universal coupling. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, this embodiment proposes an adjustable pulverizing machine with a multi-stage crushing structure, including a housing 1. A gearbox 2 and a suspension mechanism 3 are fixedly mounted on the housing 1. A drag roller 4 is mounted on the side of the housing 1 away from the suspension mechanism 3. Connecting arms 5 are rotatably mounted at both ends of the drag roller 4. The connecting arms 5 are rotatably connected to the housing 1 via connecting pins 6. A positioning pin 7 is mounted at the end of the connecting arm 5 away from the drag roller 4. Several positioning holes 8 are equally spaced in an arc shape on both sides of the housing 1, centered on the connecting pin 6. The hole 8 is adapted to the positioning pin 7, and also includes a crushing roller 9, a main shaft 12, a power transmission assembly, and a primary cutting assembly. The crushing roller 9 is rotatably mounted inside the housing 1, and several cutter holders 10 are spaced apart on the crushing roller 9. Each cutter holder 10 is rotatably mounted with a crushing blade 11. The main shaft 12 is rotatably mounted on the gearbox 2, and a drive helical gear 13 is fixedly mounted at one end of the main shaft 12 inside the gearbox 2. The power transmission assembly is mounted on the housing 1 and is used to transmit power to the crushing roller 9 to drive the crushing roller 9 to rotate; Figure 4 , Figure 6As shown, the power transmission assembly includes a transmission housing 101 and a transmission helical gear 103. The transmission housing 101 is fixedly installed outside the housing 1. A transmission shaft 102 is rotatably installed between the transmission housing 101 and the gearbox 2. The transmission helical gear 103 is rotatably installed inside the gearbox 2. The transmission helical gear 103 meshes with the drive helical gear 13. The transmission helical gear 103 is fixedly connected to one end of the transmission shaft 102. Two pulleys 104 are rotatably installed inside the transmission housing 101. A transmission belt 105 is tensioned between the two pulleys 104. One pulley 104 is fixedly connected to the end of the transmission shaft 102 away from the transmission helical gear 103, and the other pulley 104 is fixedly connected to the crushing roller 9.

[0022] Before crushing and returning straw and other materials to the field, the returning machine is connected to the rear of the tractor through the suspension mechanism 3. The output shaft at the rear of the tractor is connected to the main shaft 12. During operation, the tractor pulls the whole machine forward through the suspension mechanism 3. Power is transmitted from the rear output shaft of the tractor to the main shaft 12, thereby driving the drive helical gear 13 to rotate. The drive helical gear 13 drives the transmission helical gear 103 to rotate, and at the same time drives the first-stage cutting component to work, thereby performing preliminary crushing of straw and other materials through the first-stage cutting component.

[0023] Subsequently, the chopped short straw segments enter the working area of ​​the crushing roller 9. As the transmission helical gear 103 rotates, it drives the corresponding pulley 104 to rotate via the transmission shaft 102. Through the transmission belt 105, the crushing roller 9 can be driven to rotate via another pulley 104. In turn, the crushing blade 11 is driven to rotate around the axis of the crushing roller 9 via the blade holder 10. The chopped straw is further struck and cut by the high-speed swung crushing blade 11. After two stages of processing, the straw is crushed into relatively uniform small segments, which are finally scattered in the field or plowed into the soil.

[0024] The height of roller 4 is adjustable, such as Figure 5 As shown, the operator can change the relative angle between the roller 4 and the housing 1 by inserting the positioning pin 7 into the positioning holes 8 at different positions, thereby adjusting the depth of the crushing blade 11 into the soil. This makes it easier to adapt to different stubble heights and soil conditions, ensuring the consistency of the crushing effect.

[0025] The primary cutting assembly is located at the bottom of the casing 1, on the side of the crushing roller 9 away from the drag roller 4, and is used to cut the straw before crushing it. Figures 7 to 12As shown, the primary cutting assembly includes an assembly crossbeam 201, a drive shaft 202, an assembly bracket 203, a cutting mechanism, and a transmission mechanism. The assembly crossbeam 201 is fixedly mounted on the housing 1 and is located on the side of the crushing roller 9 away from the drag roller 4. The drive shaft 202 is rotatably mounted inside the assembly crossbeam 201. Several assembly brackets 203 are spaced apart at the bottom of the assembly crossbeam 201. Each assembly bracket 203 is equipped with a cutting mechanism for initially cutting the material before the crushing blade 11 contacts it. A transmission mechanism is provided between the assembly crossbeam 201 and the gearbox 2 to drive the drive shaft 202 to rotate.

[0026] As the casing 1 moves, when the straw enters the working area of ​​the cutting mechanism, the power is transmitted to the drive shaft 202 through the transmission mechanism, so that the drive shaft 202 rotates. Then, the drive shaft 202 drives the cutting mechanism inside each assembly bracket 203 to perform preliminary cutting of the straw.

[0027] After cutting, the straw enters the crushing roller 9 area in shorter segments. The crushing blade 11 strikes and crushes the already cut straw. In this way, the long straw is cut off in advance, which can reduce the probability of straw getting tangled on the crushing roller 9 or clogging it. At the same time, it can also reduce the impact force on the crushing blade 11, extend the service life of the blade, and the straw length entering the crushing zone is more uniform, resulting in a more uniform crushing effect.

[0028] The cutting mechanism includes a rotating sleeve 204, a reciprocating slider 206, and a reciprocating cutter 208, such as Figures 9 to 12 As shown, each assembly bracket 203 has a rotating sleeve 204 rotatably mounted inside. The inner wall of the rotating sleeve 204 has an annular groove 205. Each assembly bracket 203 has a reciprocating slider 206 slidably mounted on it, which slides in cooperation with the rotating sleeve 204. A positioning block 207 is fixedly mounted on the reciprocating slider 206, and the positioning block 207 matches the annular groove 205. Each reciprocating slider 206 has a reciprocating cutter 208 at its bottom. Each assembly bracket 203 has a fixed cutter 209 symmetrically and fixedly mounted at its bottom, with the fixed cutter 209 corresponding to the... The reciprocating cutter 208 is slidably adapted, and the blade positions of the fixed cutter 209 and the reciprocating cutter 208 are provided with a number of cutting grooves 210 at intervals. It also includes a first helical gear 211 and a second helical gear 212. The top of each mounting bracket 203 is rotatably provided with a first helical gear 211. The first helical gear 211 is coaxially and fixedly connected to the corresponding rotating sleeve 204 through a universal coupling 220. A number of second helical gears 212 are spaced apart and fixedly provided on the drive shaft 202. The number of second helical gears 212 correspond one-to-one with the number of first helical gears 211 and are arranged in a meshing manner.

[0029] The ends of both the fixed cutter 209 and the reciprocating cutter 208 have a certain gap with the ground. This gap is adjusted by the height adjustment mechanism of the drag roller 4 to adapt to different stubble heights and soil conditions, and to avoid the cutter from entering the soil, which would lead to increased wear or power consumption.

[0030] As the drive shaft 202 rotates, the drive shaft 202 drives the first helical gear 211 to rotate through the meshing of the second helical gear 212 and the first helical gear 211. The first helical gear 211 drives the rotating sleeve 204 to rotate through the universal coupling 220. The inner wall of the rotating sleeve 204 is provided with an annular inclined groove 205. A positioning block 207 is fixed on the reciprocating slider 206. Since the reciprocating slider 206 can only slide vertically on the mounting bracket 203, when the rotating sleeve 204 rotates, the positioning block 207 can drive the reciprocating slider 206 to move up and down reciprocally through the setting of the annular inclined groove 205.

[0031] At the same time, the reciprocating slider 206 drives the reciprocating cutter 208 at the bottom to move up and down together. The mounting bracket 203 is fixedly provided with a fixed cutter 209 at the bottom. When the reciprocating cutter 208 moves downward, it forms a shearing engagement with the fixed cutter 209 to cut the straw located between the two. The cutting grooves 210 opened at intervals on its blade can cut the straw, prevent the straw from slipping during the shearing process, and improve the cutting efficiency.

[0032] The transmission mechanism includes a transmission frame 213, a driven helical gear 215, a third helical gear 216, and a fourth helical gear 217, such as Figure 7 , Figure 8 As shown, the transmission frame 213 is fixedly mounted at the bottom of the gearbox 2. Two drive gears 214 are rotatably mounted inside the transmission frame 213 and mesh with each other. A driven helical gear 215 is rotatably mounted inside the gearbox 2 and meshes with the driving helical gear 13. A third helical gear 216 is coaxially fixedly mounted on the drive shaft 202. A fourth helical gear 217 is rotatably mounted inside the assembly crossbeam 201 and meshes with the third helical gear 216. The driven helical gear 215 is fixedly connected to one of the drive gears 214 through a connecting rod 218, and the fourth helical gear 217 is fixedly connected to the other drive gear 214 through a drive shaft 219.

[0033] During operation, as the driving helical gear 13 rotates, it drives the driven helical gear 215 to rotate. The driven helical gear 215 transmits power to the first drive gear 214 inside the transmission frame 213 through the connecting rod 218. The first drive gear 214 meshes with the second drive gear 214 to transmit power. The second drive gear 214 drives the fourth helical gear 217 to rotate through the drive shaft 219. The fourth helical gear 217 meshes with the third helical gear 216 on the drive shaft 202, ultimately driving the drive shaft 202 to rotate.

[0034] Before crushing and returning straw and other materials to the field, the straw returning machine is connected to the rear of the tractor through the suspension mechanism 3. The output shaft at the rear of the tractor is connected to the main shaft 12. During operation, the tractor pulls the whole machine forward through the suspension mechanism 3. Power is transmitted from the rear output shaft of the tractor to the main shaft 12, thereby driving the drive helical gear 13 to rotate. The drive helical gear 13 synchronously drives the transmission helical gear 103 and the driven helical gear 215 to rotate.

[0035] As the driven helical gear 215 rotates, it transmits power to the first drive gear 214 inside the transmission frame 213 via the connecting rod 218. The first drive gear 214 meshes with the second drive gear 214 to transmit power. The second drive gear 214 drives the fourth helical gear 217 to rotate via the drive shaft 219. The fourth helical gear 217 meshes with the third helical gear 216 on the drive shaft 202, ultimately driving the drive shaft 202 to rotate.

[0036] As the drive shaft 202 rotates, the drive shaft 202 drives the first helical gear 211 to rotate through the meshing of the second helical gear 212 and the first helical gear 211. The first helical gear 211 drives the rotating sleeve 204 to rotate through the universal coupling 220. Through the setting of the annular inclined groove 205, the reciprocating slider 206 can be driven to move up and down through the positioning block 207. In turn, the reciprocating slider 206 drives the reciprocating cutter 208 at the bottom to move up and down together. The bottom of the mounting bracket 203 is fixedly provided with a fixed cutter 209. When the reciprocating cutter 208 moves downward, it forms a shearing engagement with the fixed cutter 209 to cut the straw located between the two. The cutting grooves 210 opened at intervals on its blade can cut the straw, prevent the straw from slipping during the cutting process, and improve the cutting efficiency.

[0037] Subsequently, the chopped straw enters the crushing roller 9 area in shorter segments. As the transmission helical gear 103 rotates, it drives the corresponding pulley 104 to rotate via the transmission shaft 102. Through the transmission belt 105, the crushing roller 9 can be rotated via another pulley 104. In turn, the crushing blade 11 rotates around the axis of the crushing roller 9 via the blade holder 10. Through the cooperation of the fixed cutter 209 and the reciprocating cutter 208, some long straws are cut off in advance, thereby reducing the probability of straw getting tangled on the crushing roller 9 or clogging it. These chopped straws are further struck and cut by the high-speed swung crushing blade 11. After two-stage processing, the straw is crushed into relatively uniform small segments, which are finally scattered in the field or plowed into the soil.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable pulverizing machine with a multi-stage crushing structure, comprising a housing (1), a gearbox (2) and a suspension mechanism (3) fixedly mounted on the housing (1), a drag roller (4) disposed on the side of the housing (1) away from the suspension mechanism (3), a connecting arm (5) rotatably mounted on both ends of the drag roller (4), the connecting arm (5) being rotatably connected to the housing (1) via a connecting pin (6), a positioning pin (7) disposed on the end of the connecting arm (5) away from the drag roller (4), and a plurality of positioning holes (8) spaced at equal angles in an arc shape on both sides of the housing (1) with the connecting pin (6) as the center, the positioning holes (8) being adapted to the positioning pin (7), characterized in that, Also includes: A crushing roller (9) is rotatably disposed inside the housing (1). Several blade holders (10) are arranged at intervals on the crushing roller (9), and each blade holder (10) is rotatably disposed with a crushing blade (11). The main shaft (12) is rotatably mounted on the gearbox (2), and a drive helical gear (13) is fixedly mounted at one end of the main shaft (12) inside the gearbox (2). A power transmission assembly is disposed on the housing (1) and is used to transmit power to the crushing roller (9) to drive the crushing roller (9) to rotate; A primary cutting assembly is provided at the bottom of the housing (1) and is located on the side of the crushing roller (9) away from the drag roller (4) for cutting the straw before crushing.

2. The adjustable pulverizing machine with a multi-stage crushing structure according to claim 1, characterized in that, The power transmission component includes: A transmission housing (101) is fixedly disposed outside the housing (1), and a transmission shaft (102) is rotatably disposed between the transmission housing (101) and the gearbox (2). The transmission helical gear (103) is rotatably disposed inside the gearbox (2). The transmission helical gear (103) meshes with the driving helical gear (13). The transmission helical gear (103) is fixedly connected to one end of the transmission shaft (102).

3. The adjustable pulverizing machine with a multi-stage crushing structure according to claim 2, characterized in that, The transmission housing (101) has two pulleys (104) rotatably arranged inside, and a transmission belt (105) is tensioned between the two pulleys (104). One of the pulleys (104) is fixedly connected to the end of the transmission shaft (102) away from the transmission helical gear (103), and the other pulley (104) is fixedly connected to the crushing roller (9).

4. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 1, characterized in that, The primary cutting component includes: Assembly frame (201) is fixedly mounted on the housing (1) and the assembly frame (201) is located on the side of the crushing roller (9) away from the drag roller (4); A drive shaft (202) is rotatably disposed inside the assembly crossbeam (201); Assembly bracket (203), and several assembly brackets (203) are spaced apart at the bottom of the assembly crossbeam (201). The cutting mechanism is provided inside each of the assembly brackets (203) for initially cutting the material before the crushing blade (11) comes into contact with the material; A transmission mechanism is provided between the assembly crossbeam (201) and the gearbox (2) for driving the drive shaft (202) to rotate.

5. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 4, characterized in that, The cutting mechanism includes: Rotary sleeve (204), each of the assembly brackets (203) is rotatably provided with the rotary sleeve (204), and the inner wall of the rotary sleeve (204) is provided with an annular inclined groove (205); A reciprocating slider (206) is slidably disposed on each of the assembly brackets (203). The reciprocating slider (206) is slidably engaged with the rotating sleeve (204). A positioning block (207) is fixedly disposed on the reciprocating slider (206). The positioning block (207) is adapted to the annular inclined groove (205). A reciprocating cutter (208) is provided at the bottom of each of the reciprocating sliders (206).

6. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 5, characterized in that, Each of the assembly brackets (203) has a fixed cutter (209) symmetrically and fixedly installed at its bottom, and the fixed cutter (209) is slidably adapted to the reciprocating cutter (208) at the corresponding position.

7. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 6, characterized in that, The fixed cutter (209) and the reciprocating cutter (208) are provided with a number of cutting grooves (210) spaced apart at their blade positions.

8. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 7, characterized in that, It also includes a first helical gear (211) and a second helical gear (212). The first helical gear (211) is rotatably mounted on the top of each of the mounting brackets (203). The first helical gear (211) is coaxially and fixedly connected to the corresponding rotating sleeve (204) through a universal coupling (220). A plurality of second helical gears (212) are spaced apart and fixedly mounted on the drive shaft (202). The plurality of second helical gears (212) correspond one-to-one with the plurality of first helical gears (211) and are meshed.

9. An adjustable pulverizing machine with a multi-stage crushing structure according to claim 4, characterized in that, The transmission mechanism includes: A transmission frame (213) is fixedly installed at the bottom of the gearbox (2). Two drive gears (214) are rotatably installed inside the transmission frame (213), and the two drive gears (214) mesh with each other. Driven helical gear (215), the driven helical gear (215) is rotatably disposed inside the gearbox (2), the driven helical gear (215) meshes with the driving helical gear (13); The third helical gear (216) and the fourth helical gear (217) are coaxially fixed on the drive shaft (202), and the fourth helical gear (217) is rotatably arranged inside the assembly crossbeam (201). The fourth helical gear (217) meshes with the third helical gear (216). The driven helical gear (215) is fixedly connected to one of the driving gears (214) via a connecting rod (218), and the fourth helical gear (217) is fixedly connected to the other driving gear (214) via a driving shaft (219).

Images