A double-blade cutting knife for cutting straw

Abstract

The application provides a circular ring-shaped inner-outer double-blade cutting knife for straw cutting, and relates to the technical field of agricultural machinery. The cutting knife comprises a rack, a cutting guide plate for straw insertion is fixedly installed on the rack, and a cutting knife is arranged in a lifting mode in a transverse cutting groove. The cutting knife is in a ring shape, an inner circle and an outer circle of the ring-shaped cutting knife are respectively provided with an inner blade and an outer blade, and the cutter head is driven by a lifting mechanism installed on the rack to synchronously perform lifting movement. An airflow generating device is further connected to one side of the driving wheel. The application provides a novel ring-shaped double-blade cutting knife, which can perform twice cutting operation in one lifting process, significantly improves the cutting efficiency, and the double-blade arrangement shares the cutting intensity of the single-side blade, delays the wear time of the blade. In addition, when the blade of any side is damaged, the other side blade can still be used for non-stop cutting, so that the normal production progress is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery technology, in particular to a circular ring-shaped inner and outer double-blade cutting knife for straw cutting. BACKGROUND

[0002] In agricultural production, the processing of straw has always been an important link. The traditional straw cutting equipment and cutter have many drawbacks. For example, when the commonly used straight blade cutter encounters straw with high toughness, the cutting force is not evenly distributed, and the straw is easily entangled with the cutter, resulting in low cutting efficiency and even equipment downtime. Moreover, due to the differences in thickness and texture of the straw, it is difficult to ensure the consistency of the cut during the cutting process of ordinary cutters, which is extremely unfavorable for subsequent processes such as feed processing that require uniform materials. In addition, the existing cutters are mostly single-blade structures, which wear out quickly, and frequent replacement of cutters not only increases costs but also seriously affects production progress.

[0003] For example, the prior art with publication number "CN219165196U" discloses a rotary blade type straw cutting device, which comprises a rack, a machine box, a motor, the machine box is composed of an upper machine cover and a lower machine cover, a stirring assembly is arranged in the machine box, the stirring assembly is composed of one main shaft bearing rod, four stirring knife bearing rods, three small flange plates, one rotary cutter, one large flange plate, and a plurality of stirring blades, when the rotary cutter rotates, it forms a cutting surface with the feed inlet, the straw is cut and falls into the screen, the screen is provided with a stirring assembly to further stir and crush the straw, and the appropriate straw particles fall out of the screen and are collected externally. Since the rotary cutter and the feed inlet form an inclined cutting surface, uniform cutting can be achieved for both soft and hard crop straws. The device efficiently completes the cutting operation, reduces the workload, and improves the work efficiency.

[0004] However, the above-mentioned device still has obvious defects in the process of use: the above-mentioned device adopts the common single-blade cutting blade form in the prior art, which can only perform one cutting operation in one lifting process, which is not conducive to improving the cutting efficiency, and the single-blade setting will accelerate the wear and tear, requiring frequent replacement of cutters. At the same time, if one side of the blade is damaged, it needs to be replaced immediately, which further affects the production progress. SUMMARY

[0005] The present application aims to provide a circular ring-shaped inner and outer double-blade cutting knife for straw cutting to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a kind of ring-shaped inner and outer double-blade cutting knife for straw cutting, including rack, the cutting guide plate for straw insertion is fixedly installed on the rack top surface, transverse cutting slot is opened in the cutting guide plate, and cutting knife is lifted and disposed in the transverse cutting slot;

[0008] The cutting knife is annular, and the inner circle and the outer circle of the annular cutting knife are respectively provided with an inner blade and an outer blade, the cutting knife is movably installed on the cutter head by a driving wheel and a pair of positioning wheels, the driving wheel is used to drive the cutting knife to rotate and cut, and the cutter head is lifted and moved synchronously under the driving of the lifting mechanism installed on the rack.

[0009] The side of the driving wheel is also connected with an airflow generating device, the airflow generating device is communicated with a pair of exhaust nozzles fixedly installed in the cutting guide plate through a bellows, and the driving wheel drives the airflow generating device to work and generate airflow during rotation, which is sprayed through the exhaust nozzles to remove the broken straw attached to the cutting knife during cutting.

[0010] Preferably, the lifting mechanism for driving the cutter head to lift and move includes a top plate, a speed reducer and a cutter head connecting block, the top plate is fixedly connected with the rack through four corner installed supporting rods, lifting slide rods are also fixedly installed on the two sides of the top plate, the cutter head connecting block is matched with the lifting slide rods through the sleeves fixedly connected on the two sides, so that the cutter head connecting block lifts and moves along the length direction of the lifting slide rods, and the cutter head is fixedly installed at the bottom of the cutter head connecting block and lifts and moves under the driving of the speed reducer.

[0011] Preferably, a short connecting rod is fixedly installed on the output shaft of the speed reducer, a long connecting rod is movably connected with the end of the short connecting rod away from the speed reducer, and the other end of the long connecting rod passes through the through slot of the top plate and is connected with the cutter head connecting block, so that the rotation of the speed reducer drives the long connecting rod to lift and move and in turn drives the cutter head connecting block to move synchronously.

[0012] Preferably, annular driving strips are fixedly installed on the two sides of the cutting knife between the inner blade and the outer blade, the wheels of the driving wheel movably abut on the inner circle of the annular driving strips, the driving wheel drives the annular driving strips to rotate and in turn drives the cutting knife to rotate during rotation, the driving wheel is fixedly connected with the driving shaft of the cutter head motor, and the cutter head motor is fixedly connected with the cutter head connecting block.

[0013] Preferably, the wheels of a pair of the positioning wheels movably abut on the outer circle of the annular driving strips, the positioning wheels are arranged on the two sides of the driving wheel, so that the driving wheel and the pair of positioning wheels complete the limiting and clamping of the cutting knife, and the positioning wheels are fixedly connected with the two sides of the cutter head through wheel frames.

[0014] Preferably, the airflow generating device comprises a fan blade and a sleeve, the fan blade is movably installed in the sleeve, the sleeve is fixedly connected to the cutter disc connecting block, the sleeve is communicated with the bellows at an end away from the driving wheel, a pair of the air exhaust nozzles are symmetrically arranged on both sides of the cutting guide plate in the direction of straw insertion, the air outlet of the air exhaust nozzle faces the cutting knife side, the fan blade is coaxially fixedly connected with the driving wheel, the driving wheel synchronously drives the fan blade to rotate in the rotating process, the airflow generated by the rotation of the fan blade is discharged through the air exhaust nozzle and acts on the inner blade and the outer blade of the cutting knife, thereby completing the removal of the crushed straw.

[0015] Preferably, the cutting guide plate comprises an inlet and an outlet, the inlet and the outlet gradually reduce in diameter on one side close to each other, the cutting guide plate on both sides of the inlet and the outlet is further provided with a crushed straw cleaning channel, the air exhaust nozzle is installed in the crushed straw cleaning channel, the cutting guide plate on one side of the air outlet of the air exhaust nozzle is further provided with a discharge port communicated with the crushed straw cleaning channel, the airflow and the crushed straw mixed therein are discharged outward through the discharge port.

[0016] Preferably, the four corners of the bottom of the rack are fixedly provided with moving wheels.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The present application provides a novel annular double-blade cutting knife, which is provided with inner and outer blades on a single cutter, so that the cutter can perform twice cutting operation in one lifting process, significantly improving the cutting efficiency, and the double-blade arrangement shares the cutting intensity of the single-side blade, delaying the wear time of the blade, in addition, when any one side of the blade is damaged, the other side of the blade can still be used for non-stop cutting, ensuring the normal progress of production. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a disassembled structure perspective view of the airflow generating device of the present application;

[0020] Figure 2 It is a cutter disc connecting structure perspective view of the present application;

[0021] Figure 3 It is a cutting guide plate cross-sectional structure schematic view of the present application;

[0022] Figure 4 It is a cutting knife lifting and cutting flow schematic view of the present application;

[0023] Figure 5 It is a rack and its overall structure perspective view of the present application.

[0024] In the figure: 1 frame, 2 cutting guide plate, 3 transverse cutting groove, 4 cutting knife, 5 inner blade, 6 outer blade, 7 drive wheel, 8 positioning wheel, 9 cutter, 10 bellows, 11 air outlet nozzle, 12 top plate, 13 speed reducer motor, 14 cutter connecting block, 15 support rod, 16 lifting slide rod, 17 sleeve, 18 short connecting rod, 19 long connecting rod, 20 annular drive bar, 21 cutter motor, 22 fan blade, 23 sleeve, 24 feed inlet, 25 discharge outlet, 26 straw cleaning channel, 27 discharge outlet, 28 moving wheel, 29 straw. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] Please refer to Figures 1-5 The present application provides a technical solution:

[0027] Embodiment one:

[0028] A circular ring-shaped inner-outer double-blade cutting knife for cutting straw, comprising a frame 1, a cutting guide plate 2 for inserting straw is fixedly installed on the top surface of the frame 1, a transverse cutting groove 3 is formed in the cutting guide plate 2, and a lifting-type cutting knife 4 is arranged in the transverse cutting groove 3.

[0029] The cutting knife 4 is in a ring shape, an inner blade 5 and an outer blade 6 are respectively formed in the inner circle and the outer circle of the ring-shaped cutting knife 4, the cutting knife 4 is movably installed on a cutter 9 through a drive wheel 7 and a pair of positioning wheels 8, the drive wheel 7 is used to drive the cutting knife 4 to rotate and cut, and the cutter 9 is driven by a lifting mechanism installed on the frame 1 to synchronously move up and down.

[0030] The drive wheel 7 is further connected with an airflow generating device, the airflow generating device is communicated with a pair of air outlet nozzles 11 fixedly installed in the cutting guide plate 2 through a bellows 10, and the drive wheel 7 drives the airflow generating device to work and generate airflow during the rotation process, and the airflow is sprayed out through the air outlet nozzles 11, so that the broken straw attached to the cutting knife 4 during the cutting process is removed.

[0031] In this embodiment, the rack 1 serves as the main bearing installation structure, the mobile wheels 28 are fixedly installed at the bottom of the four corners of the rack 1, so as to facilitate the movement of the device to the appropriate position, the cutting guide plate 2 is fixedly installed on the upper table, the cutting guide plate 2 is provided with a channel for inserting the straw 29, the transverse cutting groove 3 is formed in the cutting guide plate 2 above the channel, the cutting knife 4 is vertically arranged in the transverse cutting groove 3, the cutting knife 4 rotates and moves up and down to cut the inserted straw 29, which is different from the prior art, the cutting knife 4 in this embodiment is also single-piece, but the inner circle of the cutting knife 4 is hollow to form a ring-shaped knife body, and the inner blade 5 and the outer blade 6 are respectively arranged on the inner and outer sides of the ring-shaped knife body, so that the inner and outer double-blade structures are arranged on a single knife disc, the advantages of this arrangement are that the outer blade 6 cuts the straw 29 during the downward movement of the cutting knife 4, and the inner blade 5 cuts the straw 29 again during the upward movement of the cutting knife 4, so that twice cutting operations are completed in one lifting process, and the cutting efficiency is doubled compared with the existing cutting blade, since the middle part of the cutting knife 4 is hollow, the transmission structure cannot be the existing shaft center installation type transmission structure, in this embodiment, the driving wheel 7 and the pair of positioning wheels 8 are used to clamp the cutting knife 4 from both sides to fix the cutting knife 4, and the driving wheel 7 provides power for the rotation of the cutting knife 4 to realize the cutting operation, in addition, the driving wheel 7 is connected with the airflow generating device on one side, the driving wheel 7 drives the airflow generating device to work and generate airflow which is sprayed through the exhaust nozzle 11, the exhaust nozzle 11 is arranged in the cutting guide plate 2, so as to remove the broken straw attached to the cutting knife 4 during the cutting process, and ensure the smooth progress of the subsequent cutting process, as described above, the cutting knife 4 in this embodiment adopts the special structure of inner and outer double blades, is driven by the rotation of the driving wheel 7, and the driving wheel 7 also serves as the driving structure of the airflow generating device, the rotation of the driving wheel 7 generates airflow to clean the inner and outer double blades of the cutting knife 4, this cleaning method also benefits from the special structure of the inner and outer double blades of the cutting knife 4, the airflow can pass through the inner and outer sides of the cutting knife 4 at the same time, while the existing blade form makes the airflow pass through the outer edge of the blade in a single direction, this passing form hinders the flow of the airflow, and the inner and outer double blades in this application further reduce the hindrance to the flow of the airflow, so as to be more conducive to cleaning the inner and outer double blades of the cutting knife 4.

[0032] Embodiment two:

[0033] The lifting mechanism for driving the lifting movement of the cutter head 9 comprises a top plate 12, a reduction motor 13 and a cutter head connecting block 14. The top plate 12 is fixedly connected with the rack 1 through four corner-mounted supporting rods 15. The top plate 12 is also fixedly provided with lifting slide rods 16 on both sides. The cutter head connecting block 14 is cooperated with the lifting slide rods 16 through the sleeve 17 fixedly connected on both sides, so that the cutter head connecting block 14 moves up and down along the length direction of the lifting slide rods 16. The cutter head 9 is fixedly installed at the bottom of the cutter head connecting block 14, and the cutter head connecting block 14 is driven to move up and down by the rotation of the reduction motor 13.

[0034] The output shaft of the reduction motor 13 is fixedly provided with a short connecting rod 18. The long connecting rod 19 is movably connected at the end away from the reduction motor 13. The other end of the long connecting rod 19 penetrates through the through slot of the top plate 12 and is connected with the cutter head connecting block 14. The rotation of the reduction motor 13 drives the long connecting rod 19 to move up and down, thereby synchronously driving the cutter head connecting block 14.

[0035] In this embodiment, the specific structure of the lifting mechanism is further disclosed. The supporting rods 15 and the lifting slide rods 16 are installed on the top plate 12. The cutter head connecting block 14 is installed through the sleeve 17 fixedly connected on both sides and cooperated with the lifting slide rods 16. The upper part of the cutter head connecting block 14 is connected with the long connecting rods 19. The long connecting rods 19 are connected with the short connecting rod 18. The rotation of the reduction motor 13 drives the short connecting rod 18 to rotate, thereby driving the long connecting rod 19 to move up and down, and finally achieving the purpose of driving the cutting knife 4 to move up and down.

[0036] Embodiment three:

[0037] The cutting knife 4 is fixedly installed with the annular driving strip 20 on both sides between the inner blade 5 and the outer blade 6. The wheel of the driving wheel 7 movably abuts against the inner circle of the annular driving strip 20. The driving wheel 7 drives the annular driving strip 20 to rotate in the rotation process, thereby driving the cutting knife 4 to rotate. The driving wheel 7 is fixedly connected with the driving shaft of the cutter head motor 21. The cutter head motor 21 is fixedly connected with the cutter head connecting block 14.

[0038] The wheel of the pair of positioning wheels 8 movably abuts against the outer circle of the annular driving strip 20. The positioning wheels 8 are arranged on both sides of the driving wheel 7, thereby completing the limiting clamping of the cutting knife 4 through the driving wheel 7 and the pair of positioning wheels 8. The positioning wheels 8 are fixedly connected with the cutter head 9 on both sides through the wheel frame.

[0039] In this embodiment, further disclosed are the fixing and rotating driving mechanism of the cutting knife 4, the annular driving strips 20 fixedly installed on both sides of the cutting knife 4 between the inner blade 5 and the outer blade 6, the clamping and limiting of the cutting knife 4 through the driving wheel 7 and a pair of positioning wheels 8 abutting against the inner and outer rings of the annular driving strips 20, and the fixing of the driving wheel 7 on the driving shaft of the cutter motor 21, the rotation of the cutter motor 21 to drive the rotation of the driving wheel 7, the adoption of the gear slot meshing mode or the rubber wheel abutting connection mode between the driving wheel 7 and the annular driving strips 20, and the rotation of the cutting knife 4 driven by the driving wheel 7.

[0040] Embodiment Four

[0041] The airflow generating device comprises the fan blade 22 and the sleeve 23, the fan blade 22 is movably installed in the sleeve 23, the sleeve 23 is fixedly connected to the cutter connecting block 14, the sleeve 23 is in communication with the bellows 10 at the end away from the driving wheel 7, a pair of air exhaust nozzles 11 are symmetrically arranged on both sides of the cutting guide plate 2 in the direction of the straw insertion, the air outlet of the air exhaust nozzle 11 faces the side of the cutting knife 4, the fan blade 22 is coaxially fixedly connected to the driving wheel 7, the driving wheel 7 synchronously drives the rotation of the fan blade 22 in the rotating process, the airflow generated by the rotation of the fan blade 22 is discharged through the air exhaust nozzle 11 and acts on the inner blade 5 and the outer blade 6 of the cutting knife 4, thereby completing the removal of the broken straw.

[0042] In this embodiment, further disclosed are the specific structure of the airflow generating device, the fan blade 22 is coaxially fixedly connected to the driving wheel 7, the driving wheel 7 drives the rotation of the fan blade 22 in the sleeve 23, the airflow generated by the rotation of the fan blade 22 is finally discharged from the air exhaust nozzle 11 through the sleeve 23 and the bellows 10, thereby completing the removal of the broken straw.

[0043] Embodiment Five

[0044] The cutting guide plate 2 comprises the feeding port 24 and the discharging port 25, the feeding port 24 and the discharging port 25 gradually reduce in diameter on the side close to each other, the cutting guide plate 2 on both sides of the feeding port 24 and the discharging port 25 is further provided with the broken straw cleaning channel 26, the air exhaust nozzle 11 is installed in the broken straw cleaning channel 26, the cutting guide plate 2 on the side facing the air outlet of the air exhaust nozzle 11 is further provided with the discharging port 27 in communication with the broken straw cleaning channel 26, and the airflow and the broken straw mixed therein are discharged outward through the discharging port 27.

[0045] In the embodiment, the specific structure of the cutting guide plate 2 is further disclosed, the feed inlet 24 and the discharge outlet 25 adopt a horn-shaped opening structure with an outer wide and inner narrow structure, so that the feeding operation of the straw 29 can be more concentrated, the cutting guide plate 2 on both sides of the feed inlet 24 and the discharge outlet 25 is further provided with a broken straw cleaning channel 26, the setting of the broken straw cleaning channel 26 reduces the influence on the feed inlet 24 and the discharge outlet 25, the air outlet nozzle 11 is installed in the broken straw cleaning channel 26, the cutting knife 4 enters the broken straw cleaning channel 26 on both sides in the lifting process, and the broken straw attached to the cutting knife 4 is removed through the internally arranged air outlet nozzle 11, and the removed broken straw is discharged outward through the arranged discharge port 27.

[0046] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circular double-edged cutting knife for straw cutting, comprising a frame, a cutting guide plate fixedly mounted on the upper surface of the frame for straw insertion, a transverse cutting groove formed on the cutting guide plate, and a cutting knife arranged in a lifting manner in the transverse cutting groove; characterized in that: The cutting blade is annular, and the inner ring and outer ring of the annular cutting blade are respectively provided with an inner blade and an outer blade. The cutting blade is movably mounted on the cutter disc via a driving wheel and a pair of positioning wheels. The driving wheel is used to drive the cutting blade to perform a rotary cutting motion. The cutter disc is synchronously raised and lowered by a lifting mechanism installed on the frame. The cutting blade cuts the straw with the outer blade during the descent process and cuts the straw twice with the inner blade during the ascent process, thereby completing two cutting operations in one lifting process. One side of the driving wheel is also connected to an air flow generating device, which is connected to a pair of exhaust nozzles fixedly installed in the cutting guide plate through a corrugated pipe. When the driving wheel rotates, it drives the air flow generating device to generate air flow and ejects it through the exhaust nozzles, thereby removing the straw attached to the cutting blade during the cutting process; An annular drive bar is fixedly installed on both sides of the cutting knife between the inner blade and the outer blade. The wheel edge of the driving wheel movably abuts against the inner ring of the annular drive bar. During the rotation process, the driving wheel drives the annular drive bar to rotate and then drives the cutting knife to rotate. The driving wheel is fixedly connected to the driving shaft of the cutter disc motor, and the cutter disc motor is fixedly connected to the cutter disc connecting block. The wheel edges of a pair of positioning wheels movably rest against the outer ring of the annular driving strip. The positioning wheels are arranged on both sides of the driving wheel, so that the cutting knife is limited and clamped by the driving wheel and a pair of positioning wheels. The positioning wheels are fixedly connected to both sides of the cutter disc through the wheel frame.

2. The circular ring-shaped inner and outer double-edged cutting knife for straw cutting according to claim 1, characterized in that: The lifting mechanism that drives the cutter disc to lift and lower includes a top plate, a reduction motor and a cutter disc connecting block. The top plate is fixedly connected to the frame through support rods installed at the four corners. Lifting slide bars are also fixedly installed on both sides of the top plate. The cutter disc connecting block cooperates with the lifting slide bars through sleeves fixedly connected on both sides, so that the cutter disc connecting block can be lifted and lowered along the length direction of the lifting slide bars. The cutter disc is fixedly installed at the bottom of the cutter disc connecting block, and the cutter disc connecting block is driven to lift and lower by the rotation of the reduction motor.

3. The circular ring-shaped inner and outer double-edged cutting knife for straw cutting according to claim 2, characterized in that: A short connecting rod is fixedly installed on the output shaft of the reduction motor, and the short connecting rod is movably connected to a long connecting rod at one end away from the reduction motor. The other end of the long connecting rod passes through a through slot opened in the top plate and is connected to the cutter disc connecting block. The rotation of the reduction motor drives the long connecting rod to perform lifting and lowering movements, thereby pulling the cutter disc connecting block to move synchronously.

4. The circular ring-shaped inner and outer double-edged cutting knife for straw cutting according to claim 3, characterized in that: The airflow generating device includes a fan blade and a sleeve. The fan blade is movably installed in the sleeve. The sleeve is fixedly connected to the cutter disc connecting block. The sleeve is connected to the bellows at one end away from the driving wheel. A pair of exhaust nozzles are symmetrically arranged on both sides of the straw insertion direction in the cutting guide plate. The air outlet of the exhaust nozzle faces the side of the cutting knife. The fan blade is coaxially fixedly connected to the driving wheel. The driving wheel synchronously drives the fan blade to rotate during rotation. The airflow generated by the rotation of the fan blade is discharged through the exhaust nozzle and acts on the inner and outer blades of the cutting knife, thereby completing the removal of the straw.

5. A circular ring-shaped inner and outer double-edged cutting knife for straw cutting according to any one of claims 1 to 4, characterized in that: The cutting guide plate includes a feed port and a discharge port, and the diameter of the feed port and the discharge port gradually decreases as they approach each other. Straw cleaning channels are also provided in the cutting guide plates on both sides of the feed port and the discharge port. The exhaust nozzle is installed in the straw cleaning channel. A discharge port connected to the straw cleaning channel is also provided on the cutting guide plate on the side facing the exhaust nozzle outlet, and the airflow and the mixed straw are discharged outward through the discharge port.

6. The circular ring-shaped inner and outer double-edged cutting knife for straw cutting according to claim 5, characterized in that: The four corners of the bottom of the frame are fixedly mounted with moving wheels.

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