CN115318370A

CN115318370A - Crop smashing device

Info

Publication number: CN115318370A
Application number: CN202210965617.1A
Authority: CN
Inventors: 杜诗
Original assignee: Lushan Huanlyushidai Agricultural Technology Development Co ltd
Current assignee: Lushan Huanlyushidai Agricultural Technology Development Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-11-11

Abstract

The invention discloses a crop smashing device which comprises a smashing box, a first-stage smashing mechanism, a second-stage smashing mechanism, a lifting mechanism and a base in a hollow structure, wherein the base is arranged at the left end of the smashing box and communicated with the smashing box, a feeding hopper is arranged at the upper end of the smashing box, a discharging groove is arranged at the right end of the smashing box, a partition plate is arranged on the bottom wall of the smashing box, a first screen is arranged between the partition plate and the side wall of the smashing box, a sieving cavity is formed by the partition plate, the first screen and the inner wall of the smashing box, and the second-stage smashing mechanism is located in the sieving cavity. The invention relates to a crop smashing device, which can be used for primarily smashing crops through a primary smashing mechanism, transporting the crops with large integral grain size to a first screening area through a lifting mechanism, carrying out secondary smashing through the primary smashing mechanism, smashing the crops with better effect under the action of a secondary smashing mechanism, and discharging the smashed crops to an external collection box from a discharge chute for centralized treatment.

Description

Crop smashing device

Technical Field

The invention relates to the field of crop processing equipment, in particular to a crop smashing device.

Background

At present, the present crop pulverizer is mostly single-stage pulverization, it is incomplete to smash, crushing effect does not reach the idealization, can't realize the purpose of circulation crushing, moreover like maize or wheat after smashing and fermentation, can make into the fodder and supply the livestock to eat, but corn kernel and wheat if not broken completely, then can not accomplish better fermentation, the livestock has eaten broken incomplete corn kernel or wheat, with the digestion ability of livestock, be not enough to absorb nutrient substance, the waste of the energy has been caused, so propose a crop pulverizing device in order to solve above-mentioned problem.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a crop smashing device.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to a crop smashing device which comprises a smashing box, a primary smashing mechanism, a secondary smashing mechanism, a lifting mechanism and a base in a hollow structure, wherein the base is arranged at the left end of the smashing box and communicated with the smashing box, a feed hopper is arranged at the upper end of the smashing box, a discharge chute is arranged at the right end of the smashing box, a partition plate is arranged on the bottom wall of the smashing box, a first screen is arranged between the partition plate and the side wall of the smashing box, a sieving cavity is formed by the partition plate, the first screen and the inner wall of the smashing box, the secondary smashing mechanism is arranged in the sieving cavity and communicated with the sieving cavity, the first screen is arranged in the smashing box through a mounting assembly, the smashing end of the primary smashing mechanism is arranged below the feed hopper, the lifting mechanism is arranged on the base and communicated with the base, the lifting mechanism is communicated with the smashing box, and materials in the lifting mechanism are conveyed to the position above the smashing end of the primary smashing mechanism through a guide plate.

As a preferred technical scheme of the invention, the primary crushing mechanism comprises a driving assembly, two rotating shafts and two crushing rollers, the driving assembly is arranged at the outer side of the crushing box, the two rotating shafts are arranged in parallel along the front-back direction, both ends of the two rotating shafts are rotatably connected with the crushing box, the two crushing rollers are respectively fixedly sleeved on the corresponding rotating shafts, crushing teeth of the two rotating shafts are arranged in a staggered manner, and one end of each rotating shaft penetrates through the crushing box and is in transmission connection with the driving assembly, so that the two rotating shafts can rotate synchronously.

As a preferred technical solution of the present invention, the driving assembly includes a first driving motor and two gears, the two gears are respectively fixedly sleeved on the corresponding rotating shafts, the first driving motor is mounted on the upper end of the base through a mounting seat, and an output shaft of the first driving motor is in transmission connection with one of the rotating shafts through a transmission unit.

As a preferable technical scheme, the crushing device further comprises an installation box with an opening at the right end, the installation box is installed at the front end of the crushing box, the rotating shaft penetrates through the installation box and is in rotating connection with the installation box, the two gears are located in the installation box, and a maintenance door is hinged to the opening of the installation box.

As a preferred technical solution of the present invention, the transmission unit includes a first synchronous wheel, a second synchronous wheel and a synchronous belt, the first synchronous wheel is fixedly sleeved on an output shaft of the first driving motor, the second synchronous wheel is fixedly sleeved on one of the rotating shafts, and the first synchronous wheel and the second synchronous wheel are in transmission connection through the synchronous belt.

As a preferable technical solution of the present invention, the secondary crushing mechanism includes a second driving motor, a hammer assembly and a second screen, the second driving motor is installed at the front end of the crushing box, an output shaft of the second driving motor is horizontally arranged along the front-back direction and is in transmission connection with the hammer assembly, and the second screen is detachably installed inside the crushing box and is located below the hammer assembly.

As a preferable technical solution of the present invention, the mounting assembly includes a mounting plate, a first mounting block and a second mounting block, a notch is formed at a front end of the crushing box, the mounting plate is detachably mounted on a surface of the crushing box, the first mounting block, the partition plate and the second mounting block are all fixed on the mounting plate and extend into the crushing box through the notch, the first mounting block is disposed at a right end of the first returning, the second screen is mounted between the partition plate and the second mounting block, a first sliding groove, a second sliding groove and a third sliding groove are respectively disposed on an inner wall of the crushing box, the first mounting block horizontally slides on the first sliding groove in a front-back direction, the second mounting block horizontally slides on the second sliding groove in the front-back direction, the third sliding groove is disposed on a bottom wall of the crushing box, and the partition plate horizontally slides on the third sliding groove in the front-back direction.

As a preferred technical scheme of the present invention, the hammer assembly includes a hammer shaft and a plurality of hammers, one end of the hammer shaft is coaxially connected to an output shaft of the second driving motor, the other end of the hammer shaft is rotatably connected to an inner side wall of the crushing box, and the plurality of hammers are uniformly and axially fixed on the hammer shaft in an array.

The hammer is characterized by further comprising a starting fan, wherein the starting fan is fixedly sleeved on the hammer shaft.

As a preferred technical scheme of the invention, the lifting mechanism comprises a lifting bin, a third driving motor, a rotating rod and auger blades, wherein the lifting bin is vertically arranged and penetrates through the upper end of the base, a feed inlet and a discharge pipeline are arranged at intervals of the upper part and the lower part of the lifting bin, the lifting bin is communicated with the base through the feed inlet and is communicated with the crushing box through the discharge pipeline, the third driving motor is arranged at the upper end of the lifting bin, an output shaft of the third driving motor is vertically arranged and is coaxially connected with the rotating rod, and the auger blades are arranged on the rotating rod.

Compared with the prior art, the invention has the following beneficial effects:

1. to treat kibbling crops and pass through into the leading-in crushing case of hopper, can carry out preliminary crushing to crops through one-level rubbing crusher, crops after smashing can drop to first screen cloth, the granularity that the crushing degree is good also can be less, can drop to the screening intracavity through the sieve mesh of first screen cloth, the big meeting roll of whole grain degree falls to the base in, can carry the crushing end top to one-level rubbing crusher through the stock guide with the big crops of whole grain degree through hoist mechanism, and carry out the regrinding through one-level rubbing crusher, the crushing degree of until crops is good can drop to the screening intracavity through first screen cloth smoothly, can carry out the better ground of effect to crops under the effect of two-level rubbing crusher, the crops of broken completion can be followed the blown down tank and discharged and carry out centralized processing in the external collection case.

2. Start first driving motor, first driving motor's output torque transmits for first synchronizing wheel through the shaft coupling, and first synchronizing wheel passes through the hold-in range and transmits for the second synchronizing wheel, and the second synchronizing wheel rotates and drives one of them pivot rotatory, because two gear intermeshing for two pivots are synchronous and rotate to relative direction, and the mutual crisscross setting of broken tooth of two crushing rollers, make two crushing rollers can carry out shredding to the crops that enter into to the crushing incasement from going into the hopper.

3. Start second driving motor, second driving motor's output torque transmits for the hammer leaf axle through the shaft coupling, the hammer leaf axle rotates and to drive a plurality of hammer leaves whipping, the hammer leaf of high-speed whipping can carry out crushing treatment to crops, the granularity that crushing degree is good is also less, the sieve mesh that can follow second screen cloth is less than the sieve mesh of first screen cloth, and fall out in the sieve mesh that the second screen cloth was the arc screen cloth, do not have the complete crops of breakage to stay on the second screen cloth by the hammer leaf continuation breakage, fall out in the sieve mesh that can follow the second screen cloth completely until the breakage, and roll to in external collection box from the discharging chute.

4. And starting a third driving motor, transmitting the output torque of the third driving motor to a rotary rod through a coupler, and driving the auger blades to do circular motion by taking the axis of the rotary rod as the center of a circle by the rotation of the rotary rod, so that the crops entering from the feed inlet can be lifted to the discharge pipeline and discharged into the first screening area through the discharge pipeline, and the crops are secondarily crushed through two crushing rollers which rotate relatively.

5. The hammer shaft can transmit torque to the starting fan when rotating, the starting fan can do circular motion by taking the shaft center of the hammer shaft as the circle center, the starting fan can drive air in the crushing box to be discharged to the discharge chute from the inside, and crushed crops are prevented from being accumulated in the discharge chute.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial schematic view of the present invention

FIG. 3 is an overall elevational cross-sectional view of the present invention;

FIG. 4 is an overall top cross-sectional view of the present invention;

FIG. 5 is a schematic view of the two stage size reduction mechanism of the present invention;

FIG. 6 is a schematic view of the mounting assembly of the present invention;

in the figure: 1. a crushing box; 2. a primary crushing mechanism; 21. a drive assembly; 211. a first drive motor; 212. a gear; 22. a rotating shaft; 24. a crushing roller; 3. a secondary crushing mechanism; 31. a second drive motor; 32. a hammer block assembly; 321. a hammer shaft; 322. a hammer sheet; 33. a second screen; 4. a lifting mechanism; 41. lifting the bin; 42. a third drive motor; 43. rotating the rod; 44. a screw blade; 5. a base; 6. feeding into a hopper; 7. a discharge chute; 8. a partition plate; 9. a material guide plate; 10. a first screen; 11. installing a box; 12. mounting the component; 121. mounting a plate; 123. a first mounting block; 124. a second mounting block; 125. a first chute; 126. a second chute; 127. a third chute; 13. starting the fan.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

FIG. 1 is a view of the present invention, which provides a crop crushing apparatus, including a crushing box 1, a primary crushing mechanism 2, a secondary crushing mechanism 3, a lifting mechanism 4 and a hollow base 5, wherein the base 5 is disposed at the left end of the crushing box 1 and is communicated with the same, the upper end of the crushing box 1 is provided with a feed hopper 6, the right end of the crushing box 1 is provided with a discharge chute 7, the bottom wall of the crushing box 1 is provided with a partition plate 8, a first screen 10 is disposed between the partition plate 8 and the side wall of the crushing box 1, the partition plate 8, the first screen 10 and the inner wall of the crushing box 1 form a screening chamber, the secondary crushing mechanism 3 is disposed in the screening chamber, the discharge chute 7 is communicated with the screening chamber, the first screen 10 is mounted in the crushing box 1 through a mounting component 12, the crushing end of the primary crushing mechanism 2 is disposed below the feed hopper 6, the lifting mechanism 4 is disposed on the base 5 and is communicated with the same, the lifting mechanism 4 is communicated with the crushing box 1, and the material in the lifting mechanism 4 is transported to the upper side of the crushing mechanism 2 through a guide plate 9.

In this embodiment, to treat during kibbling crops are through going into leading-in crushing case 1 of hopper 6, can carry out preliminary crushing to crops through one-level rubbing crusher mechanism 2, crops after smashing can drop to first screen cloth 10 on, the granularity that the crushing degree is good can also be less, can drop to the screening intracavity through the sieve mesh of first screen cloth 10, the big meeting roll of whole grain degree falls to base 5 in, can carry the big crops of whole grain degree to the crushing end top of one-level rubbing crusher mechanism 2 through baffle 9 through hoist mechanism 4, and carry out the regrinding through one-level rubbing crusher mechanism 2, the crushing degree of until crops is good can drop to the screening intracavity through first screen cloth 10 smoothly, can carry out the better ground of effect to crops under the effect of second grade rubbing crusher mechanism 3 and smash, the crops of broken completion can be followed spout 7 discharges and carry out centralized processing in the external collection case.

Preferably, as another embodiment of the present invention, on the basis of the embodiment shown in fig. 1, as shown in fig. 4, the primary crushing mechanism 2 includes a driving assembly 21, two rotating shafts 22 and two crushing rollers 24, the driving assembly 21 is disposed outside the crushing box 1, the two rotating shafts 22 are disposed in parallel along the front-rear direction, and both ends of the two rotating shafts are rotatably connected to the crushing box 1, the two crushing rollers 24 are respectively and fixedly sleeved on the corresponding rotating shafts 22, and crushing teeth of the two crushing rollers are disposed in a staggered manner, one end of the rotating shaft 22 penetrates through the crushing box 1 and is in transmission connection with the driving assembly 21, so that the two rotating shafts 22 rotate synchronously, specifically, the driving assembly 21 includes a first driving motor 211 and two gears 212, the two gears 211 are respectively and fixedly sleeved on the corresponding rotating shafts 22, the first driving motor 211 is mounted on the upper end of the base 5 through a mounting seat, an output shaft of the first driving motor 211 is in transmission connection with one of the rotating shafts 22 through a transmission unit, the transmission unit includes a first synchronizing wheel, a second synchronizing wheel and a synchronizing wheel, the first synchronizing wheel is fixedly sleeved on an output shaft of the first synchronizing wheel, and the second synchronizing wheel is connected to the synchronizing wheel through a synchronizing belt, and the second synchronizing wheel.

In this embodiment, as one of the implementation manners, the first driving motor is started, the output torque of the first driving motor 211 is transmitted to the first synchronizing wheel through the coupler, the first synchronizing wheel is transmitted to the second synchronizing wheel through the synchronizing belt, the second synchronizing wheel rotates to drive one of the rotating shafts 22 to rotate, because the two gears 212 are meshed with each other, the two rotating shafts 22 are synchronized and rotate in opposite directions, and the crushing teeth of the two crushing rollers 24 are arranged in a staggered manner, so that the two crushing rollers 24 can crush the crops entering the crushing box 1 from the feeding hopper 6.

Preferably, still include right-hand member open-ended install bin 11, install bin 11 is installed in the front end of smashing case 1, and pivot 22 passes install bin 11 and is connected rather than rotating, and two gears 212 all are located install bin 11, and the opening part of install bin 11 articulates there is the maintenance door, and install bin 11 is used for protecting two gears 212 not influenced by the external world, and the staff that the maintenance door was convenient for overhaul overhauls each device in inside.

Preferably, as another embodiment of the present invention, on the basis of the embodiment shown in fig. 1, as shown in fig. 3, the secondary crushing mechanism 3 includes a second driving motor 31, a hammer assembly 32 and a second screen 33, the second driving motor 31 is installed at the front end of the crushing box 1, an output shaft of the second driving motor 31 is horizontally arranged along the front-back direction and is in transmission connection with the hammer assembly 32, the second screen 33 is detachably installed inside the crushing box 1 and is located below the hammer assembly 32, specifically, as shown in fig. 4, the hammer assembly 32 includes a hammer shaft 321 and a plurality of hammers 322, one end of the hammer shaft 321 is coaxially connected with the output shaft of the second driving motor 31, the other end of the hammer shaft is rotatably connected with the inner side wall of the crushing box 1, and the plurality of hammers 322 are axially and uniformly fixed on the hammer shaft 321 in an array.

In this embodiment, as one of the implementation manners, the second driving motor 31 is started, the output torque of the second driving motor 31 is transmitted to the hammer shaft 321 through the coupler, the hammer shaft 321 rotates to drive the plurality of hammers 322 to swing, the hammers 322 swinging at high speed can crush crops, the grain size with good crushing degree is smaller, the meshes of the second screen 33 are smaller than those of the first screen 10, the second screen 33 falls out of the meshes of the arc-shaped screen, the crops which are not completely crushed can be left on the second screen 33 and continuously crushed by the hammers 322 until the crops are completely crushed, and the crops can fall out of the meshes of the second screen 33 and roll to the external collection box from the discharge chute 7.

Preferably, as another embodiment of the present invention, on the basis of the embodiment shown in fig. 1, as shown in fig. 2 and fig. 6, the mounting assembly 12 includes a mounting plate 121, a first mounting block 123 and a second mounting block 124, a notch is opened at the front end of the pulverizing box 1, the mounting plate 121 is detachably mounted on the surface of the pulverizing box 1, the first mounting block 123, the partition plate 8 and the second mounting block 124 are all fixed on the mounting plate 121 and extend into the pulverizing box 1 through the notch, the first mounting block 123 is arranged at the right end of the first screen 10, the second screen 33 is arranged between the partition plate 8 and the second mounting block 124, a first chute 125, a second chute 126 and a third chute 127 are respectively arranged on the inner wall of the pulverizing box 1, the first mounting block 123 horizontally slides on the first chute 125 in the front-back direction, the second mounting block 124 horizontally slides on the second chute 126 in the front-back direction, the third chute 127 is arranged on the bottom wall of the pulverizing box 1, and the partition plate 8 horizontally slides on the third chute 127 in the front-back direction.

In this embodiment, as one embodiment, when it is necessary to replace the first screen 10 or the second screen 33, the fixing bolts of the mounting plate 121 may be unscrewed, the mounting plate 121 may be removed from the crush box 1, the first mounting block 123 may horizontally slide on the first chute 125 in the front-rear direction, the second mounting block 124 may horizontally slide on the second chute 126 in the front-rear direction, the partition 8 may horizontally slide on the third chute 127 in the front-rear direction, the first screen 10 may be mounted between the partition 8 and the first mounting block 123, and the second screen 33 may be mounted between the partition 8 and the second mounting block 124, so that the first screen 10 and the second screen 33 may be removed through the notches, the first screen 10 and the second screen 33 may be cleaned in the outside, the first screen 10 or the second screen 33 may be replaced with a different aperture size, after replacement or cleaning, the first mounting block 123 may be aligned with the first chute 125, the second mounting block 124 may be aligned with the second chute 126, the partition 8 may be aligned with the third chute 127, the first screen 10 and the second screen 33 may be placed in the crush box 1, and the screen may be fixed to the crush box 1.

Preferably, the agricultural crop smashing machine further comprises a starting fan 14, the starting fan 14 is fixedly sleeved on the hammer shaft 321, when the hammer shaft 321 rotates, the torque can be transmitted to the starting fan 13, the starting fan 13 makes a circular motion by taking the axis of the hammer shaft 321 as a circle center, the starting fan 13 can drive air in the smashing box 1 to be discharged to the discharging groove 7 from the inside, and smashed crops are prevented from being accumulated in the discharging groove 7.

Preferably, as another embodiment of the present invention, on the basis of the embodiment shown in fig. 1, as shown in fig. 3, the lifting mechanism 4 includes a lifting bin 41, a third driving motor 42, a rotating rod 43 and an auger blade 44, the lifting bin 41 is vertically disposed and penetrates through the upper end of the base 5, a feeding port and a discharging pipe are disposed at an upper and lower interval on the lifting bin 41, the lifting bin 41 is communicated with the base 5 through the feeding port and is communicated with the pulverizing box 1 through the discharging pipe, the third driving motor 42 is mounted at the upper end of the lifting bin 41, an output shaft of the third driving motor 42 is vertically disposed and is coaxially connected with the rotating rod 43, and the auger blade 44 is disposed on the rotating rod 43.

In this embodiment, as one implementation manner, the third driving motor 42 is started, the output torque of the third driving motor 42 is transmitted to the rotating rod 43 through the coupler, and the rotating rod 43 rotates to drive the auger blades 44 to make a circular motion around the axis of the rotating rod 43, so that the crops entering from the feeding port can be lifted to the discharging pipeline and discharged into the first screening area 8 through the discharging pipeline, and the crops are secondarily crushed by the two crushing rollers 24 rotating relatively.

The working principle of the invention is as follows:

the first driving motor 211, the second driving motor 31 and the third driving motor 42 are all connected with an external control system and a power supply, crops to be crushed are guided into the first screening area 8 in the crushing box 1 through the feeding hopper 6, the first driving motor 211 is started, the output torque of the first driving motor 211 is transmitted to the first synchronizing wheel through the coupler, the first synchronizing wheel is transmitted to the second synchronizing wheel through the synchronizing belt, the second synchronizing wheel rotates to drive one of the rotating shafts 22 to rotate, the two rotating shafts 22 rotate synchronously and in opposite directions due to the mutual meshing of the two gears 212, and the crushing teeth of the two crushing rollers 24 are arranged in a staggered mode, so that the two crushing rollers 24 can crush the crops entering the first screening area 8 from the feeding hopper 6, the crushed crops can fall onto the first screen 10, and the granularity of the crushed crops is small, the crop falling through the sieve pores of the first sieve mesh 10 into the sieving cavity, falling into the base 5 with large granularity, starting the third driving motor 42, transmitting the output torque of the third driving motor 42 to the rotary rod 43 through the coupler, rotating the rotary rod 43 to drive the auger blades 44 to do circular motion with the axis of the rotary rod 43 as the center of circle, lifting the crop entering from the feed inlet to the discharge pipeline, discharging the crop into the first sieving area 8 through the discharge pipeline, performing secondary crushing on the crop through the two crushing rollers 24 rotating relatively until the crushing degree of the crop is good enough to smoothly drop into the sieving cavity through the first sieve mesh 10, starting the second driving motor 31, transmitting the output torque of the second driving motor 31 to the hammer leaf shaft 321 through the coupler, rotating the hammer leaf shaft 321 to drive the hammer leaves 322 to swing, and crushing the crop through the hammer leaves 322 swinging at high speed, the granularity with good crushing degree is also smaller, and can fall out from the sieve pores of the second sieve mesh 33, crops which are not completely crushed can be remained on the second sieve mesh 33 to be continuously crushed by the hammer piece 322 until the crops are completely crushed, can fall out from the sieve pores of the second sieve mesh 33, and roll to an external collection box from the discharge chute 7 for centralized treatment.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A crop smashing device is characterized by comprising a smashing box (1), a primary smashing mechanism (2), a secondary smashing mechanism (3), a lifting mechanism (4) and a base (5) in a hollow structure, the base (5) is arranged at the left end of the crushing box (1) and is communicated with the crushing box, the upper end of the crushing box (1) is provided with a feeding hopper (6), the right end of the crushing box (1) is provided with a discharge chute (7), a baffle plate (8) is arranged on the bottom wall of the crushing box (1), a first screen mesh (10) is arranged between the baffle plate (8) and the side wall of the crushing box (1), the inner walls of the clapboard (8), the first screen (10) and the crushing box (1) form a screening cavity, the secondary crushing mechanism (3) is positioned in the screening cavity, the discharge chute (7) is communicated with the screening cavity, the first screen (10) is arranged in the crushing box (1) through an installation component (12), the crushing end of the primary crushing mechanism (2) is positioned below the feeding hopper (6), the lifting mechanism (4) is arranged on the base (5) and communicated with the base, the lifting mechanism (4) is communicated with the crushing box (1), and conveying the materials in the lifting mechanism (4) to the upper part of the crushing end of the primary crushing mechanism (2) through a material guide plate (9).

2. The crop smashing device according to claim 1, wherein the first-stage smashing mechanism (2) comprises a driving assembly (21), two rotating shafts (22) and two smashing rollers (24), the driving assembly (21) is arranged on the outer side of the smashing box (1), the two rotating shafts (22) are arranged in parallel in the front-back direction, two ends of each rotating shaft are rotatably connected with the smashing box (1), the two smashing rollers (24) are respectively and fixedly sleeved on the corresponding rotating shafts (22), smashing teeth of the two smashing rollers are arranged in a staggered mode, one end of each rotating shaft (22) penetrates out of the smashing box (1) and is in transmission connection with the driving assembly (21), and therefore the two rotating shafts (22) can rotate synchronously.

3. The crop smashing device according to claim 2, wherein the driving assembly (21) comprises a first driving motor (211) and two gears (212), the two gears (211) are fixedly sleeved on the corresponding rotating shafts (22), the first driving motor (211) is mounted at the upper end of the base (5) through a mounting seat, and an output shaft of the first driving motor (211) is in transmission connection with one of the rotating shafts (22) through a transmission unit.

4. A crop crushing apparatus as claimed in claim 3, further comprising an installation box (11) with an opening at the right end, wherein the installation box (11) is installed at the front end of the crushing box (1), the rotating shaft (22) passes through the installation box (11) and is rotatably connected with the installation box, the two gears (212) are both located in the installation box (11), and a maintenance door is hinged at the opening of the installation box (11).

5. The crop smashing device according to claim 3, wherein the transmission unit comprises a first synchronizing wheel, a second synchronizing wheel and a synchronous belt, the first synchronizing wheel is fixedly sleeved on an output shaft of the first driving motor (211), the second synchronizing wheel is fixedly sleeved on one rotating shaft (22), and the first synchronizing wheel and the second synchronizing wheel are connected through the synchronous belt in a transmission mode.

6. A crop crushing apparatus as claimed in claim 1, characterized in that the secondary crushing mechanism (3) comprises a second driving motor (31), a hammer assembly (32) and a second screen (33), the second driving motor (31) is installed at the front end of the crushing box (1), the output shaft of the second driving motor (31) is horizontally arranged along the front-back direction and is in transmission connection with the hammer assembly (32), and the second screen (33) is detachably installed inside the crushing box (1) and is positioned below the hammer assembly (32).

7. A crop crushing apparatus according to claim 6, wherein the mounting assembly (12) comprises a mounting plate (121), a first mounting block (123) and a second mounting block (124), a notch is formed in the front end of the crushing box (1), the mounting plate (121) is detachably mounted on the surface of the crushing box (1), the first mounting block (123), the partition plate (8) and the second mounting block (124) are fixed on the mounting plate (121) and extend into the crushing box (1) through the notch, the first mounting block (123) is arranged at the right end of the first returning block (10), the second screen (33) is arranged between the partition plate (8) and the second mounting block (124), a first sliding groove (125), a second sliding groove (126) and a third sliding groove (127) are respectively arranged on the inner wall of the crushing box (1), the first mounting block (123) horizontally slides on the first sliding groove (125) in the front-back direction, the second mounting block (124) horizontally slides on the second sliding groove (126) and the bottom wall of the crushing box (127) horizontally slides on the third sliding groove (127) in the front-back direction, and the sliding groove (127) is arranged on the bottom wall of the crushing box (8).

8. The crop smashing device according to claim 6, wherein the hammer assembly (32) comprises a hammer shaft (321) and a plurality of hammers (322), one end of the hammer shaft (321) is coaxially connected with an output shaft of the second driving motor (31), the other end of the hammer shaft is rotatably connected with the inner side wall of the smashing box (1), and the plurality of hammers (322) are axially and uniformly fixed on the hammer shaft (321) in an array.

9. The crop crushing device as claimed in claim 8, further comprising a lifting fan (13), wherein the lifting fan (13) is fixedly sleeved on the hammer blade shaft (321).

10. The crop smashing device according to claim 1, wherein the lifting mechanism (4) comprises a lifting bin (41), a third driving motor (42), a rotating rod (43) and auger blades (44), the lifting bin (41) is vertically arranged and penetrates through the upper end of the base (5), a feeding hole and a discharging pipeline are arranged on the lifting bin (41) at intervals from top to bottom, the lifting bin (41) is communicated with the base (5) through the feeding hole, the crushing bin (1) is communicated through the discharging pipeline, the third driving motor (42) is installed at the upper end of the lifting bin (41), an output shaft of the third driving motor (42) is vertically arranged and is coaxially connected with the rotating rod (43), and the auger blades (44) are arranged on the rotating rod (43).