CN111567240A

CN111567240A - Agricultural straw reducing mechanism

Info

Publication number: CN111567240A
Application number: CN202010399631.0A
Authority: CN
Inventors: 伊长英
Original assignee: Individual
Current assignee: Jinan Qiyuan Information Technology Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-08-25

Abstract

The invention discloses an agricultural straw smashing device which comprises a feeding mechanism, wherein the feeding mechanism comprises a feeding table, a protection plate and a straw feeding box, the inner wall of the straw feeding box is provided with a low-speed rolling feeding roller for rolling straws, the top end of the straw smashing box is provided with a high-speed cutting roller, the inner wall of the straw smashing box is provided with an inclined sliding plate, the bottom end of the inclined sliding plate is provided with a rolling metal smashing belt, the right side of the bottom end of the rolling metal smashing belt is provided with a smashed straw feeding port, and the side wall of the smashed straw feeding port is provided with an air inlet. Through setting up high-speed cutting gyro wheel and rectangle cutting knife, can break the straw cutting that is rolled into by low-speed roll feeding gyro wheel, grind the surface in area through rolling the metal and set up concave type groove piece and rotate the protruding type briquetting of being connected with concave type groove piece, can be when conveying the straw piece, roll shredding to the straw piece, ensured the kibbling thoroughness of straw.

Description

Agricultural straw reducing mechanism

Technical Field

The invention relates to the technical field of agricultural tools, in particular to an agricultural straw smashing device.

Background

The utilization of crop straws by farmers in China has a long history, the prior agricultural production level is low, the yield is low, the quantity of the straws is small, most of the straws are used as fuel for burning except for a small quantity of straws used for gaskets and feeding livestock and part of straws used for composting, and along with the development of agricultural production, the quantity of the straws is increased due to the improvement of grain yield, and in addition, the popularization of firewood and coal saving technologies, the popularization of coal burning and liquefied gas use are realized, so that a great quantity of surplus straws are available in rural areas.

The existing straw crushing device has the defects of low straw crushing efficiency, unsatisfactory crushing effect and the like when the existing straw crushing device is used for crushing straws in batches.

Therefore, an agricultural straw smashing device is needed.

Disclosure of Invention

The invention aims to provide an agricultural straw smashing device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an agricultural straw smashing device comprises a feeding mechanism, wherein the feeding mechanism comprises a feeding table, a protection plate and a straw feeding box, a feeding hole is formed in the left side of the straw feeding box, the feeding table is arranged on the left side of the feeding hole, the protection plate for preventing foreign matters from flying out of the straw feeding box is arranged at the top end of the feeding table, a low-speed rolling feeding roller for rolling straws is arranged on the inner wall of the straw feeding box, a straw smashing box is fixedly connected to the right end of the straw feeding box, a high-speed cutting roller is arranged at the top end of the straw smashing box, an inclined sliding plate is arranged on the inner wall of the straw smashing box and located at the lower end of the high-speed cutting roller, a rolling metal smashing belt is arranged at the bottom end of the inclined sliding plate, a smashed straw discharging hole is formed in the right side of the bottom end of the rolling metal, the utility model discloses a straw feed opening, including smashing straw feed opening, air outlet, air inlet, feed back slide, the left side fixedly connected with fan of smashing the straw feed opening, the air outlet of fan and the air intake fixed connection of smashing the straw feed opening, the bottom of smashing the straw feed opening is provided with the feed back mouth, the bottom fixedly connected with feed back slide of feed back mouth, the right wall of smashing the straw feed opening is provided with the discharge gate, the bottom fixedly connected with ejection of compact slide of discharge gate, the top of ejection of compact slide is provided with metal exhaust and leaks.

Preferably, the low-speed rolling feeding roller is cylindrical, the surface of the low-speed rolling feeding roller is fixedly connected with a plurality of convex nails, the number of the convex nails is a plurality, the convex nails are uniformly distributed on the surface of the low-speed rolling feeding roller, the axis of the low-speed rolling feeding roller is fixedly connected with a first central shaft, the surface of one end of the first central shaft is fixedly connected with a low-speed bearing, the number of the low-speed bearings is two, the inner annular surface of the low-speed bearing is fixedly connected with the low-speed rolling feeding roller, the outer annular surface of the low-speed bearing is fixedly connected with the side wall of the straw feeding box, the front end of the first central shaft penetrates through the side wall of the straw feeding box and extends out of the straw feeding box, the front end of the first central shaft is fixedly connected with a belt, and the bottom end of the belt is in transmission connection with a low-speed gearbox.

Preferably, the high-speed cutting roller is cylindrical, the fixed surface of the high-speed cutting roller is connected with a sawtooth-shaped rectangular cutting knife, the fixed surface of the rectangular cutting knife is connected with a blade, the blades on the surface of the rectangular cutting knife are arranged in two layers, the blade is installed clockwise, the number of the rectangular cutting knife is provided with a plurality of cutting knives, and the rectangular cutting knives are uniformly distributed on the surface of the high-speed cutting roller.

Preferably, the axle center of the high-speed cutting roller is provided with a second central shaft, the surface of one end of the second central shaft is fixedly connected with a high-speed bearing, the number of the high-speed bearings is two, the inner ring surface of the high-speed bearing is fixedly connected with a high-speed cutting roller, the outer ring surface of the high-speed bearing is fixedly connected with the side wall of the straw crushing box, one end of the front surface of the second central shaft penetrates through the side wall of the straw crushing box and extends out of the straw crushing box, one end of the front surface of the second central shaft is fixedly connected with a second belt, the front surface of the straw crushing box is fixedly connected with a first driving motor, the other end of the second belt is in transmission connection with an output shaft of a first driving motor, the output shaft of the first driving motor is in transmission connection with a third belt, the other end cover of third belt is equipped with low-speed gearbox, the third belt is connected with the transmission of low-speed gearbox.

Preferably, the inner side of the rolling metal crushing belt is rotatably connected with a third roller and a fourth roller, the axis of the third roller is fixedly connected with a third central shaft, the axis of the fourth roller is fixedly connected with a fourth central shaft, one end of each of the third central shaft and the fourth central shaft is fixedly connected with a pressure bearing, the number of the pressure bearings is four, the outer annular surface of each of the four pressure bearings is fixedly connected with the side wall of the straw crushing box, the front end of the third central shaft penetrates through the side wall of the straw crushing box and extends out of the straw crushing box, the front side of the straw crushing box is provided with a second driving motor, and the front end of the third central shaft is fixedly connected with an output shaft of the second driving motor.

Preferably, the surface that the rolling metal pulverizes the area is provided with concave groove piece, the quantity of concave groove piece is a plurality of, a plurality of concave groove piece evenly distributed pulverizes the surface of area in the rolling metal, the upper end that the rolling metal pulverizes the area is provided with the protruding type rotary press piece with concave groove piece shape looks adaptation, the quantity of protruding type rotary press piece is two, the surface of protruding type rotary press piece is provided with protruding type piece, every the quantity of the protruding type piece that protruding type rotary press piece surface set up is four, eight protruding type piece all with the concave groove piece adaptation on rolling metal pulverizes the area surface, the rolling metal pulverizes the area and rotates and drive protruding type rotary press piece and rotate.

Preferably, the bottom of case and straw feeding case is smashed to the straw all is provided with the mount that is used for the support, the quantity of mount is four, four be provided with the crossbeam that is used for additional strengthening bulk strength between the mount, the bottom of mount all is provided with the pulley, the quantity of pulley is four, four the pulley includes two movable pulleys and two fixed pulleys, two the top of movable pulley is provided with the braking service brake that is used for the braking.

Preferably, the right side fixedly connected with block terminal of mount, the block terminal and the equal electric connection of first driving motor, second driving motor and fan, the surface of block terminal is provided with the emergency braking switch who is used for emergency power off.

Advantageous effects

The invention provides an agricultural straw smashing device, which has the following beneficial effects:

1. this agricultural straw reducing mechanism, through setting up feeding table and guard plate, the workman puts the straw and slides on the feeding table, avoided personnel to receive the straw and the injury of the interior foreign matter that pops out of box, through setting up low-speed roll feeding gyro wheel and convex nail, can ensure that the straw can be rolled and draw in the straw feeding incasement, through setting up the low-speed gearbox, can make the speed that the straw rolled the feeding reduce, prevent that the straw from being driven at a high speed and taking place the accident, guarantee personnel's safety.

2. The agricultural straw smashing device can cut the straws rolled in by the low-speed rolling feeding roller by arranging the high-speed cutting roller and the rectangular cutting knife, by arranging the inclined sliding plate, the straw fragments which are cut and broken are gathered and conveyed to the leftmost end of the rolling metal grinding belt, by arranging the concave groove block and the convex rotary pressing block which is rotationally connected with the concave groove block on the surface of the rolling metal grinding belt, when straw fragments are conveyed, crushing treatment is carried out on straw fragments, the completeness of straw crushing is guaranteed, wind power is used for screening the straws after the crushing process is finished through the fan, the feed back slide way and the discharging slide way, a small amount of large un-crushed straws slide out from the feed back slide way due to gravity, and the crushed straws completely slide out from the discharging slide way due to wind power and are intercepted by the metal exhaust leakage net and fall.

3. This agricultural straw reducing mechanism sets up the crossbeam through the surface at the mount, additional strengthening's bulk strength, prevents that the straw from adding man-hour, and the shake of structure is invertd in the rotation of each gyro wheel, through setting up the pulley, is convenient for shift and move the structure, through setting up block terminal and emergency braking switch in the front of feed inlet, is convenient for control each electrical equipment's power and the braking of structure under emergency.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a left side view of the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1 feeding table, 2 protective plates, 3 straw feeding boxes, 4 low-speed rolling feeding rollers, 5 straw crushing boxes, 6 high-speed cutting rollers, 7 inclined sliding plates, 8 rolling metal crushing belts, 9 crushed straw feed openings, 10 fans, 11 feed back slideways, 12 discharge slideways, 13 metal exhaust leakage nets, 14 convex nails, 15 low-speed bearings, 16 first central shafts, 17 low-speed variable boxes, 18 rectangular cutting knives, 19 high-speed bearings, 20 first driving motors, 21 pressure bearings, 22 second driving motors, 23 concave groove blocks, 24 convex rotary pressing blocks, 25 fixing frames, 26 pulleys, 27 cross beams and 28 distribution boxes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides an agricultural straw reducing mechanism, including feed mechanism, feed mechanism includes feeding table 1, guard plate 2, straw feeding case 3, the feed inlet has been seted up in the left side of straw feeding case 3, the left side of feed inlet is provided with feeding table 1, the top of feeding table 1 is provided with the guard plate 2 that blocks the foreign matter and fly out from straw feeding case 3, through setting up feeding table 1 and guard plate 2, the workman puts the straw and slides on feeding table 1 and sends into, avoided personnel to receive the injury of the foreign matter that pops out in straw and the box.

The inner wall of the straw feeding box 3 is provided with a low-speed rolling feeding roller 4 for rolling straws, the low-speed rolling feeding roller 4 is cylindrical, the surface of the low-speed rolling feeding roller 4 is fixedly connected with a plurality of convex nails 14, the plurality of convex nails 14 are uniformly distributed on the surface of the low-speed rolling feeding roller 4, the axis of the low-speed rolling feeding roller 4 is fixedly connected with a first central shaft 16, the surface of one end of the first central shaft 16 is fixedly connected with a low-speed bearing 15, the number of the low-speed bearings 15 is two, the inner annular surface of the low-speed bearing 15 is fixedly connected with the low-speed rolling feeding roller 4, the outer annular surface of the low-speed bearing 15 is fixedly connected with the side wall of the straw feeding box 3, the positive end of the first central shaft 16 penetrates through the side wall of the straw feeding box 3 and extends out of the straw feeding box 3, one positive end of the first central shaft 16 is, the bottom end of the belt is in transmission connection with a low-speed gearbox 17, the low-speed rolling feeding roller 4 and the convex nails 14 are arranged, so that straws can be rolled and pulled into the straw feeding box 3, the speed of the straw rolling feeding can be reduced by arranging the low-speed gearbox 17, the straws are prevented from being driven at a high speed to cause accidents, and the safety of personnel is guaranteed.

Case 5 is smashed to right-hand member fixedly connected with straw of straw feeding case 3, the top that case 5 is smashed to the straw is provided with high-speed cutting gyro wheel 6, high-speed cutting gyro wheel 6 is cylindrically, the surperficial fixedly connected with zigzag's of high-speed cutting gyro wheel 6 rectangle cutting knife 18, the fixed surface of rectangle cutting knife 18 is connected with the blade point, the blade point on rectangle cutting knife 18 surface is provided with two-layerly, the direction of blade point is clockwise installation, the quantity of rectangle cutting knife 18 has a plurality of, a plurality of rectangle cutting knife 18 evenly distributed is on the surface of high-speed cutting gyro wheel.

The axle center of high-speed cutting gyro wheel 6 is provided with the second center pin, the fixed surface of second center pin one end is connected with high speed bearing 19, high speed bearing 19 has two, high speed bearing 19's interior anchor ring fixedly connected with high-speed cutting gyro wheel 6, high speed bearing 19's outer anchor ring and straw crushing case 5's lateral wall fixed connection, the positive one end of second center pin runs through the lateral wall of straw crushing case 5 and extends outside straw crushing case 5, the positive one end fixedly connected with second belt of second center pin, the positive fixedly connected with first driving motor 20 of straw crushing case 5, the other end of second belt is connected with the output shaft transmission of first driving motor 20, the output shaft transmission of first driving motor 20 is connected with the third belt, the other pot head of third belt is equipped with low-speed gearbox 17, the third belt is connected with low-speed gearbox 17 transmission.

The inner wall of the straw crushing box 5 is provided with an inclined sliding plate 7, the inclined sliding plate 7 is positioned at the lower end of the high-speed cutting roller 6, the bottom end of the inclined sliding plate 7 is provided with a rolling metal crushing belt 8, the inner side of the rolling metal crushing belt 8 is rotatably connected with a third roller and a fourth roller, the axis of the third roller is fixedly connected with a third central shaft, the axis of the fourth roller is fixedly connected with a fourth central shaft, one ends of the third central shaft and the fourth central shaft are fixedly connected with pressure bearings 21, four pressure bearings 21 are provided, the outer ring surfaces of the four pressure bearings 21 are fixedly connected with the side wall of the straw crushing box 5, the positive end of the third central shaft penetrates through the side wall of the straw crushing box 5 and extends out of the straw crushing box 5, the positive side of the, one end of the front surface of the third central shaft is fixedly connected with an output shaft of the second driving motor 22.

The surface of the rolling metal grinding belt 8 is provided with a plurality of concave groove blocks 23, the number of the concave groove blocks 23 is a plurality, a plurality of concave groove blocks 23 are uniformly distributed on the surface of the rolling metal grinding belt 8, the upper end of the rolling metal grinding belt 8 is provided with a convex rotary pressing block 24 matched with the shape of the concave groove blocks 23, the number of the convex rotary pressing blocks 24 is two, the surface of the convex rotary pressing block 24 is provided with convex blocks, the convex blocks arranged on the surface of each convex rotary pressing block 24 are four, eight convex blocks are matched with the concave groove blocks on the surface of the rolling metal grinding belt 8, the rolling metal grinding belt 8 rotates to drive the convex rotary pressing block 24 to rotate, through arranging an inclined sliding plate 7, the cut and broken straw fragments are gathered and transmitted to the leftmost end of the rolling metal grinding belt 8, through arranging the concave groove blocks 23 on the surface of the rolling metal grinding belt 8 and the convex rotary pressing block 24 rotatably connected with the concave groove blocks 23, the straw crushing machine can crush and crush the straw fragments while conveying the straw fragments, and ensures the completeness of straw crushing.

The right side of the bottom end of the rolling metal grinding belt 8 is provided with a ground straw feed opening 9, the side wall of the ground straw feed opening 9 is provided with an air inlet, the left side of the ground straw feed opening 9 is fixedly connected with a fan 10, an air outlet of the fan 10 is fixedly connected with the air inlet of the ground straw feed opening 9, the bottom end of the ground straw feed opening 9 is provided with a feed back port, the bottom end of the feed back port is fixedly connected with a feed back slideway 11, the right wall of the ground straw feed opening 9 is provided with a discharge port, the bottom end of the discharge port is fixedly connected with a discharge slideway 12, the top end of the discharge slideway 12 is provided with a metal exhaust leakage net 13, the fan 10, the feed back slideway 11 and the discharge slideway 12 are arranged, wind power screens straws which are crushed after the crushing process, a small amount of large un-crushed straws slide out from, and is intercepted by the metal exhaust leakage net 13 and falls.

The bottom of the straw crushing box 5 and the straw feeding box 3 is provided with four fixing frames 25 for supporting, the number of the fixing frames 25 is four, the beams 27 for reinforcing the overall strength of the structure are arranged between the four fixing frames 25, the beams 27 are arranged on the surface of the fixing frames 25, the overall strength of the structure is reinforced, and the shaking of the structure is inverted in the rotation of each roller when the straws are processed is prevented.

The bottom of mount 25 all is provided with pulley 26, and there are four pulley 26's quantity, and four pulley 26 include two movable pulleys and two fixed pulleys, and the top of two movable pulleys is provided with the braking service brake who is used for the braking, through setting up pulley 26, is convenient for shift and move the structure.

The right side fixedly connected with block terminal 28 of mount 25, block terminal 28 and first driving motor 20, the equal electric connection of second driving motor 22 and fan 10, block terminal 28's surface is provided with the emergency braking switch who is used for emergency power off, through setting up block terminal 28 and emergency braking switch in the front of feed inlet, is convenient for control each electrical equipment's power and brake the structure under emergency.

The working principle is as follows: when the agricultural straw smashing device is used, firstly, the device pushes the horizontal ground through the pulley 26, the brake foot brake of the pulley 26 is locked, the first driving motor 20, the second driving motor 22 and the fan 10 are controlled to work through the distribution box 28, the device is confirmed to run safely without any noise, straws are stuffed into the straw feeding box 3 from the feeding table 1, the protection plate 2 is pushed inwards, the straws are pushed to the straw feeding box 3 under the rolling action of the low-speed rolling feeding roller 4 and the convex nail 14 and then enter the straw smashing box 5 to contact the high-speed cutting roller 6 rotating at high speed, the straws in thin sections are pulled by the rectangular cutting knife 18 to be cut and scattered into small sections, the straws in the thin sections slide to the left end of the rolling metal smashing belt 8 from the inclined sliding plate 7, and can be thoroughly processed into small smashed concave sections under the mutual rolling pressure of the groove block 23 and the convex smashing block 24 while the straw fragments are conveyed, the straws are blown by the fan 10 when being conveyed to the position of the crushed straw feed opening 9, the straws which are crushed and finished in the crushing process are screened by wind power, a small amount of large un-crushed straws slide out from the feed back slideway 11 due to gravity, can be added into the mechanism from the feeding table 1 after being accumulated, and the completely crushed straws slide out from the discharge slideway 12 due to the wind power and are intercepted by the metal exhaust leakage net 13 and fall.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an agricultural straw reducing mechanism, includes feed mechanism, its characterized in that: the feeding mechanism comprises a feeding table (1), a protection plate (2) and a straw feeding box (3), wherein a feeding hole is formed in the left side of the straw feeding box (3), the feeding table (1) is arranged on the left side of the feeding hole, the protection plate (2) for preventing foreign matters from flying out of the straw feeding box (3) is arranged at the top end of the feeding table (1), a low-speed rolling feeding roller (4) for rolling straws is arranged on the inner wall of the straw feeding box (3), a straw crushing box (5) is fixedly connected to the right end of the straw feeding box (3), a high-speed cutting roller (6) is arranged at the top end of the straw crushing box (5), an inclined sliding plate (7) is arranged on the inner wall of the straw crushing box (5), the inclined sliding plate (7) is located at the lower end of the high-speed cutting roller (6), a rolling metal crushing belt (8) is arranged at, the utility model discloses a straw crushing machine, including roll metal crushing area (8), the bottom right side of smashing straw feed opening (9) is provided with crushing straw feed opening (9), the lateral wall of smashing straw feed opening (9) is provided with the air intake, left side fixedly connected with fan (10) of smashing straw feed opening (9), the air outlet of fan (10) and the air intake fixed connection of smashing straw feed opening (9), the bottom of smashing straw feed opening (9) is provided with the feed back mouth, the bottom fixedly connected with feed back slide (11) of feed back mouth, the right wall of smashing straw feed opening (9) is provided with the discharge gate, the bottom fixedly connected with ejection of compact slide (12) of discharge gate, the top of ejection of compact slide (12) is provided with metal exhaust hourglass net (13).

2. An agricultural straw crushing device according to claim 1, wherein: the low-speed rolling feeding roller (4) is cylindrical, the surface of the low-speed rolling feeding roller (4) is fixedly connected with a plurality of convex nails (14), the number of the convex nails (14) is a plurality, the convex nails (14) are uniformly distributed on the surface of the low-speed rolling feeding roller (4), the axis of the low-speed rolling feeding roller (4) is fixedly connected with a first central shaft (16), the surface of one end of the first central shaft (16) is fixedly connected with a low-speed bearing (15), the number of the low-speed bearings (15) is two, the inner annular surface of the low-speed bearing (15) is fixedly connected with the low-speed rolling feeding roller (4), the outer annular surface of the low-speed bearing (15) is fixedly connected with the side wall of the straw feeding box (3), one end of the front surface of the first central shaft (16) penetrates through the side wall of the straw feeding box (3) and extends out of the straw feeding box (3), the positive one end fixedly connected with belt of first center pin (16), the bottom transmission of belt is connected with low-speed gearbox (17).

3. An agricultural straw crushing device according to claim 1, wherein: the high-speed cutting roller (6) is cylindrical, the fixed surface of the high-speed cutting roller (6) is connected with a sawtooth-shaped rectangular cutting knife (18), the fixed surface of the rectangular cutting knife (18) is connected with a knife edge, the knife edge on the surface of the rectangular cutting knife (18) is provided with two layers, the direction of the knife edge is clockwise installed, the number of the rectangular cutting knife (18) is provided with a plurality of cutting knives, and the rectangular cutting knives (18) are uniformly distributed on the surface of the high-speed cutting roller (6).

4. An agricultural straw crushing device according to claim 1, wherein: a second central shaft is arranged at the axis of the high-speed cutting roller (6), a high-speed bearing (19) is fixedly connected to the surface of one end of the second central shaft, two high-speed bearings (19) are arranged, the high-speed cutting roller (6) is fixedly connected to the inner annular surface of the high-speed bearing (19), the outer annular surface of the high-speed bearing (19) is fixedly connected with the side wall of the straw crushing box (5), the front end of the second central shaft penetrates through the side wall of the straw crushing box (5) and extends out of the straw crushing box (5), a second belt is fixedly connected to the front end of the second central shaft, a first driving motor (20) is fixedly connected to the front end of the straw crushing box (5), the other end of the second belt is in transmission connection with an output shaft of the first driving motor (20), and a third belt is in transmission connection with an output shaft of the first driving motor (20, the other end cover of third belt is equipped with low-speed gearbox (17), the third belt is connected with low-speed gearbox (17) transmission.

5. An agricultural straw crushing device according to claim 1, wherein: the inner side of the rolling metal grinding belt (8) is rotationally connected with a third roller and a fourth roller, the axle center of the third roller is fixedly connected with a third central shaft, the axle center of the fourth roller is fixedly connected with a fourth central shaft, one end of each of the third central shaft and the fourth central shaft is fixedly connected with a pressure bearing (21), the number of the pressure bearings (21) is four, the outer ring surfaces of the four pressure bearings (21) are fixedly connected with the side wall of the straw crushing box (5), one end of the front surface of the third central shaft penetrates through the side wall of the straw crushing box (5), one end of the front surface of the third central shaft penetrates through the side wall of the straw crushing box (5) and extends out of the straw crushing box (5), a second driving motor (22) is arranged on the front surface of the straw crushing box (5), and one end of the front surface of the third central shaft is fixedly connected with an output shaft of a second driving motor (22).

6. An agricultural straw crushing device according to claim 1, wherein: the surface of rolling metal grinding belt (8) is provided with concave groove block (23), the quantity of concave groove block (23) is a plurality of, a plurality of concave groove block (23) evenly distributed is on the surface of rolling metal grinding belt (8), the upper end of rolling metal grinding belt (8) is provided with protruding type rotary pressing block (24) with concave groove block (23) shape looks adaptation, the quantity of protruding type rotary pressing block (24) is two, the surface of protruding type rotary pressing block (24) is provided with protruding type block, every the quantity of protruding type block that protruding type rotary pressing block (24) surface set up is four, eight protruding type block all with the concave groove block adaptation on rolling metal grinding belt (8) surface, rolling metal grinding belt (8) rotates and drives protruding type rotary pressing block (24) and rotates.

7. An agricultural straw crushing device according to claim 1, wherein: the bottom of straw crushing case (5) and straw feeding case (3) all is provided with mount (25) that are used for the support, the quantity of mount (25) is four, four be provided with crossbeam (27) that are used for additional strengthening bulk strength between mount (25), the bottom of mount (25) all is provided with pulley (26), the quantity of pulley (26) is four, four pulley (26) include two movable pulleys and two fixed pulleys, two the top of movable pulley is provided with the braking service brake who is used for the braking.

8. An agricultural straw crushing device according to claims 1 to 7, wherein: the right side fixedly connected with block terminal (28) of mount (25), block terminal (28) and the equal electric connection of first driving motor (20), second driving motor (22) and fan (10), the surface of block terminal (28) is provided with the emergency braking switch who is used for emergency power off.