Annular inner and outer double-edge cutting knife

Abstract

The invention provides a circular-ring-shaped inner and outer double-edge cutting knife, and relates to the technical field of agricultural machinery, the circular-ring-shaped inner and outer double-edge cutting knife comprises a rack, a cutting guide plate for straw insertion is fixedly mounted on an upper table top of the rack, and a cutting knife is arranged in a transverse cutting groove in a lifting manner; the cutting knife is annular, an inner edge and an outer edge are arranged on the inner ring and the outer ring of the annular cutting knife respectively, and the knife disc is driven by a lifting mechanism installed on the machine frame to synchronously ascend and descend. According to the novel annular double-edge cutting blade, two times of cutting operation can be carried out in the one-time lifting process, the cutting efficiency is remarkably improved, the cutting strength of a single-side cutting edge is shared through the arrangement of the double edges, the abrasion time of the cutting edge is delayed, and in addition, the cutting efficiency is improved. When the cutting edge on any side is damaged, the cutting edge on the other side can still be used for non-stop cutting, and normal production progress is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a circular ring-shaped inner and outer double-edged cutting knife. Background Art

[0002] In agricultural production, straw processing has always been an important link. Traditional straw cutting equipment and cutters have many drawbacks. For example, when facing tougher straw, the cutting force of common straight-edged cutters is unevenly dispersed, and it is very easy for straw to wrap around the cutters, resulting in low cutting efficiency and even equipment shutdown. Moreover, during the cutting process, it is difficult to ensure the consistency of the incision due to the differences in the thickness and texture of the straw, which is extremely unfavorable for subsequent processes such as feed processing that require uniform materials. In addition, most existing cutters are single-edged structures and wear quickly. Frequent replacement of cutters not only increases costs, but also seriously affects production progress.

[0003] For example, a rotary blade type straw cutting device with the publication number of "CN219165196U" in the prior art includes: a frame, a chassis, and a motor. The chassis is composed of an upper cover and a lower cover. A stirring assembly is arranged in the chassis. The stirring assembly is composed of a main bearing rod, four stirring blade bearing rods, three small flange plates, a rotary cutter disc, a large flange plate, and a plurality of stirring blades. When the rotary cutter disc rotates, a cutting surface is formed with the feed port, and the straw is cut and falls into the mesh screen. The mesh screen is provided with a stirring assembly to stir and crush the straw again, and suitable straw particles fall out of the mesh screen and are collected from the outside. Since the rotary cutter disc and the feed port form an inclined cutting surface, the rotary cutting can achieve uniform cutting of both relatively soft crop straw and relatively hard crop straw. Since the initial straw cutting is relatively uniform, repeated stirring and cutting are less required. The device has the advantages of efficiently completing the cutting operation, reducing the workload, and improving the work efficiency.

[0004] However, the above-mentioned device still has obvious defects during use: the above-mentioned device adopts the single-edged cutting blade commonly used in the prior art. This cutting method can only perform one cutting operation during one lifting process, which is not conducive to improving cutting efficiency. The single-edged setting will accelerate wear and tear, and the tool needs to be replaced frequently. At the same time, if one side of the blade is damaged, it is necessary to stop the machine immediately for replacement, which affects the progress of production work. Summary of the invention

[0005] The object of the present invention is to provide a circular ring-shaped inner and outer double-edged cutting knife to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A circular inner and outer double-edge cutting knife, including a frame, on the upper surface of the frame is fixedly installed a cutting guide plate for inserting straws, a transverse cutting groove is opened on the cutting guide plate, and a cutting knife is arranged in the transverse cutting groove in a lifting manner;

[0008] The cutting knife is annular, an inner edge and an outer edge are respectively opened on the inner circle and the outer circle of the annular cutting knife, the cutting knife is movably installed on a cutter head through a driving wheel and a pair of positioning wheels, the driving wheel is used to drive the cutting knife to perform rotary cutting motion, and the cutter head synchronously performs lifting motion driven by a lifting mechanism installed on the frame;

[0009] One side of the driving wheel is also connected with an air flow generating device, the air flow generating device is communicated with a pair of exhaust nozzles fixedly installed in the cutting guide plate through a corrugated pipe, and the driving wheel pushes the air flow generating device to work to generate air flow and spray it out through the exhaust nozzles during rotation, so as to remove the broken straws attached to the cutting knife during the cutting process.

[0010] Preferably, the lifting mechanism for driving the cutter head to perform lifting motion includes a top plate, a reduction motor and a cutter head connection block, the top plate is fixedly connected with the frame through support rods installed at four corners, lifting slide rods are also fixedly installed on both sides of the top plate, the cutter head connection block is matched with the lifting slide rods through sleeves fixedly connected to both sides, so that the cutter head connection block performs lifting motion along the length direction of the lifting slide rods, and the cutter head is fixedly installed at the bottom of the cutter head connection block, and the cutter head connection block is driven to perform lifting motion by the rotation of the reduction motor.

[0011] Preferably, a short connecting rod is fixedly installed on the output shaft of the reduction motor, the long connecting rod is movably connected to the end of the short connecting rod far away from the reduction motor, and the other end of the long connecting rod passes through a through groove opened on the top plate and is connected with the cutter head connection block, and the rotation of the reduction motor drives the long connecting rod to perform lifting motion and then pulls the cutter head connection block to move synchronously.

[0012] Preferably, annular driving strips are fixedly installed on both sides of the cutting knife between the inner edge and the outer edge, the wheel edge of the driving wheel is movably abutted against the inner circle of the annular driving strip, the driving wheel drives the annular driving strip to rotate during rotation and then drives the cutting knife to rotate, the driving wheel is fixedly connected to the driving shaft of the cutter head motor, and the cutter head motor is fixedly connected to the cutter head connection block.

[0013] Preferably, the wheel edges of a pair of positioning wheels are movably abutted against the outer circle of the annular driving strip, the positioning wheels are arranged on both sides of the driving wheel, so as to complete the limiting clamping of the cutting knife through the driving wheel and a pair of positioning wheels, and the positioning wheels are fixedly connected to both sides of the cutter head through wheel frames.

[0014] Preferably, 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, and 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 fragments.

[0015] Preferably, the cutting guide plate includes a feed port and a discharge port, and the diameters of the feed port and the discharge port gradually decrease 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 where the exhaust nozzle outlet faces, and the airflow and the mixed straw cleaning are discharged outwardly through the discharge port.

[0016] Preferably, movable wheels are fixedly mounted at the four corners of the bottom of the frame.

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

[0018] The present invention provides a novel annular double-edged cutting blade, which is provided with inner and outer edges on a single tool, so that the tool can perform two cutting operations during one lifting and lowering process, which significantly improves the cutting efficiency. The double-edged setting shares the cutting strength of the single-sided blade and delays the wear time of the blade. In addition, when the blade on either side is damaged, the blade on the other side can still be used for cutting without stopping the machine, thereby ensuring the normal progress of the production progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the disassembled structure of the airflow generating device of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of the cutter head connection structure of the present invention;

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

[0022] Figure 4 It is a schematic diagram of the cutting process of the cutting knife lifting and cutting of the present invention;

[0023] Figure 5 It is a three-dimensional schematic diagram of the frame and its overall structure of the present invention.

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

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] A circular inner and outer double-edge cutting knife includes a frame 1. A cutting guide plate 2 for inserting straw is fixedly installed on the upper surface of the frame 1. A transverse cutting groove 3 is formed on the cutting guide plate 2, and a cutting knife 4 is arranged in the transverse cutting groove 3 in a lifting manner;

[0029] The cutting knife 4 is annular. An inner blade 5 and an outer blade 6 are respectively formed on the inner circle and the outer circle of the annular cutting knife 4. The cutting knife 4 is movably installed on a cutter head 9 through a driving wheel 7 and a pair of positioning wheels 8. The driving wheel 7 is used to drive the cutting knife 4 to perform a rotary cutting motion, and the cutter head 9 performs a synchronous lifting motion under the drive of a lifting mechanism installed on the frame 1;

[0030] One side of the driving wheel 7 is also connected with an air flow generating device. The air flow generating device is communicated with a pair of exhaust air nozzles 11 fixedly installed in the cutting guide plate 2 through a bellows 10. During the rotation process of the driving wheel 7, the air flow generating device is pushed to work to generate an air flow and spray it out through the exhaust air nozzles 11, so as to remove the crushed straw attached to the cutting knife 4 during the cutting process.

[0031] In this embodiment, the frame 1 serves as the main load-bearing and mounting structure. At the four corners of the bottom of the frame 1, moving wheels 28 are fixedly installed, facilitating the movement of the device to a suitable position. On its upper surface, a cutting guide plate 2 is fixedly installed. A channel for inserting straw 29 is provided inside the cutting guide plate 2. A transverse cutting groove 3 is provided on the cutting guide plate 2 above the channel. A cutting knife 4 is arranged in the transverse cutting groove 3 in a lifting manner. The inserted straw 29 is cut through the lifting and rotating movement of the cutting knife 4. Different from the prior art, although the cutting knife 4 in this embodiment is also a single-piece type, the inner circle of the cutting knife 4 is hollowed out to form a ring-shaped knife body. Inner blades 5 and outer blades 6 are respectively provided on the inner and outer sides of the ring-shaped knife body. Thus, a double-edge structure with inner and outer edges is arranged on one cutter disc. The advantage of this setting is that during the downward movement of the cutting knife 4, the straw 29 is cut by the outer blade 6, and during the upward movement, the straw 29 is secondarily cut by the inner blade 5. Thus, two cutting operations are completed in one lifting process. Compared with the existing cutting blades, the cutting efficiency is doubled. Since the middle of the cutting knife 4 is hollowed out, its transmission structure cannot adopt the existing axial center installation type transmission structure. In this embodiment, a driving wheel 7 and a 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, an air flow generating device is connected to one side of the driving wheel 7. During the rotation of the driving wheel 7, the air flow generating device is pushed to work to generate air flow and is ejected through an exhaust nozzle 11. The exhaust nozzle 11 is arranged inside the cutting guide plate 2 to remove the broken straw attached to the cutting knife 4 during the cutting process, ensuring the smooth progress of the subsequent cutting process. To sum up, the cutting knife 4 in this embodiment adopts a special structure form with inner and outer double edges, is driven in cooperation with the rotation of the driving wheel 7, and the driving wheel 7 also serves as the driving structure of the air flow generating device. Air flow is generated through the rotation of the driving wheel 7 to clean the inner and outer double edges of the cutting knife 4. This cleaning method also benefits from the special structure form of the inner and outer double edges of the cutting knife 4. The air flow can pass through both the inner and outer sides of the cutting knife 4 simultaneously, while the existing blade form enables the air flow to pass only unidirectionally from the outer edge of the blade. This passing form hinders the fluidity of the air flow, and the inner and outer double-edge setting in this application further reduces the hindrance to the air flow, thus being more conducive to cleaning the inner and outer double edges of the cutting knife 4.

[0032] Embodiment Two:

[0033] The lifting mechanism for driving the lifting movement of the cutter head 9 includes a top plate 12, a reduction motor 13, and a cutter head connection block 14. The top plate 12 is fixedly connected to the frame 1 through support rods 15 installed at the four corners. Lifting slide rods 16 are also fixedly installed on both sides of the top plate 12. The cutter head connection block 14 is matched with the lifting slide rods 16 through sleeves 17 fixedly connected to both sides, so that the cutter head connection 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 connection block 14, and the rotation of the reduction motor 13 drives the cutter head connection block 14 to move up and down.

[0034] A short connecting rod 18 is fixedly installed on the output shaft of the reduction motor 13. One end of the short connecting rod 18 away from the reduction motor 13 is movably connected to a long connecting rod 19. The other end of the long connecting rod 19 passes through a through groove opened in the top plate 12 and is connected to the cutter head connection block 14. The rotation of the reduction motor 13 drives the long connecting rod 19 to move up and down, thereby pulling the cutter head connection block 14 to move synchronously.

[0035] In this embodiment, the specific structure of the lifting mechanism is further disclosed. The support rods 15 and the lifting slide rods 16 are installed through the top plate 12. The cutter head connection block 14 is matched with the lifting slide rods 16 through sleeves 17 fixedly connected to both sides, thereby completing the installation of the cutter head connection block 14. The upper part of the cutter head connection block 14 is connected to a pair of long connecting rods 19, and the pair of long connecting rods 19 are connected to the short connecting rod 18. The rotation of the reduction motor 13 drives the short connecting rod 18 to rotate, and then drives the long connecting rods 19 to move up and down, ultimately achieving the purpose of driving the cutting tool 4 to move up and down.

[0036] Embodiment Three:

[0037] Ring-shaped drive strips 20 are fixedly installed on both sides of the cutting tool 4 between the inner blade 5 and the outer blade 6. The rim of the drive wheel 7 is movably abutted against the inner ring of the ring-shaped drive strip 20. During the rotation of the drive wheel 7, it drives the ring-shaped drive strip 20 to rotate, thereby driving the cutting tool 4 to rotate. The drive wheel 7 is fixedly connected to the drive shaft of the cutter head motor 21, and the cutter head motor 21 is fixedly connected to the cutter head connection block 14.

[0038] The rims of a pair of positioning wheels 8 are movably abutted against the outer ring of the ring-shaped drive strip 20. The positioning wheels 8 are arranged on both sides of the drive wheel 7, so as to complete the limit clamping of the cutting tool 4 through the drive wheel 7 and the pair of positioning wheels 8. The positioning wheels 8 are fixedly connected to both sides of the cutter head 9 through wheel frames.

[0039] In this embodiment, a fixing and rotational driving mechanism of the cutting knife 4 is further disclosed. An annular driving strip 20 is fixedly installed on both sides of the cutting knife 4 between the inner blade 5 and the outer blade 6. The driving wheel 7 and a pair of positioning wheels 8 respectively abut against the inner and outer circles of the annular driving strip 20, thereby completing the clamping and limiting of the cutting knife 4. At the same time, the driving wheel 7 is fixedly connected to the driving shaft of the blade disc motor 21. The rotation of the blade disc motor 21 drives the driving wheel 7 to rotate. The driving wheel 7 and the annular driving strip 20 can adopt a tooth-groove meshing method or a rubber wheel abutment connection method, and finally the purpose of the driving wheel 7 driving the cutting knife 4 to rotate can be achieved.

[0040] Embodiment 4:

[0041] The airflow generating device includes a fan blade 22 and a sleeve 23. The fan blade 22 is movably installed in the sleeve 23. The sleeve 23 is fixedly connected to the cutter disc connecting block 14. The end of the sleeve 23 away from the driving wheel 7 is connected to the bellows 10. A pair of exhaust nozzles 11 are symmetrically arranged on both sides of the straw insertion direction in the cutting guide plate 2. The air outlet of the 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 fan blade 22 to rotate during the rotation process. The airflow generated by the rotation of the fan blade 22 is discharged through the 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 straw.

[0042] In this embodiment, the specific structure of the airflow generating device is further disclosed. The fan blades 22 are coaxially fixedly connected to the driving wheel 7. The driving wheel 7 rotates to drive the fan blades 22 to rotate in the sleeve 23. The airflow generated by the rotation of the fan blades 22 passes through the sleeve 23 and the bellows 10 and is finally ejected from the exhaust nozzle 11, thereby completing the removal of the straw fragments.

[0043] Embodiment five:

[0044] The cutting guide plate 2 includes a feed port 24 and a discharge port 25. The feed port 24 and the discharge port 25 gradually reduce their diameters as they approach each other. Straw cleaning channels 26 are also provided in the cutting guide plate 2 on both sides of the feed port 24 and the discharge port 25. The exhaust nozzle 11 is installed in the straw cleaning channel 26. A discharge port 27 connected to the straw cleaning channel 26 is also provided on the cutting guide plate 2 on the side where the exhaust nozzle 11 is facing. The airflow and the mixed straw are discharged outward through the discharge port 27.

[0045] In this embodiment, the specific structure of the cutting guide plate 2 is further disclosed. The feed inlet 24 and the discharge outlet 25 adopt a flared opening structure with a wider outer width and a narrower inner width, so as to be able to perform the feeding operation of the straw 29 more centrally. A crushed straw cleaning channel 26 is also provided inside the cutting guide plate 2 on both sides of the feed inlet 24 and the discharge outlet 25. By setting the crushed straw cleaning channel 26, the influence on the feed inlet 24 and the discharge outlet 25 is reduced. The exhaust nozzle 11 is installed in the crushed straw cleaning channel 26. During the lifting process, the cutting knife 4 enters the crushed straw cleaning channels 26 on both sides, and the crushed straw attached to the cutting knife 4 is removed through the exhaust nozzle 11 provided inside. The removed crushed straw is discharged outwards through the provided discharge port 27.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circular inner and outer double-edged cutting knife, comprising a frame, a cutting guide plate for straw insertion is fixedly mounted on the upper surface of the frame, a transverse cutting groove is provided on the cutting guide plate, and a cutting knife is lifted and arranged in the transverse cutting groove; characterized in that: The cutting knife is annular, and the inner ring and outer ring of the annular cutting knife are respectively provided with an inner blade and an outer blade. The cutting knife is movably mounted on the cutter disc through a driving wheel and a pair of positioning wheels. The driving wheel is used to drive the cutting knife to perform a rotary cutting motion. The cutter disc is synchronously lifted and lowered under the drive of a lifting mechanism installed on the frame. An airflow generating device is also connected to one side of the driving wheel, and the airflow generating device is connected to a pair of exhaust nozzles fixedly installed in the cutting guide plate through a corrugated pipe. During the rotation of the driving wheel, the airflow generating device is driven to generate airflow and spray it out through the exhaust nozzle, thereby removing the straw attached to the cutting knife during the cutting process.

2. The circular inner and outer double-edged cutting knife 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 four corners, and lifting slide bars are 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 inner and outer double-edged cutting knife according to claim 2, characterized in that: A short connecting rod is fixedly installed on the output shaft of the reduction motor, and a long connecting rod is movably connected to one end of the short connecting rod away from the reduction motor. The other end of the long connecting rod passes through a through slot provided 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 inner and outer double-edged cutting knife according to claim 3, characterized in that: An annular drive strip is fixedly installed on both sides of the cutting knife between the inner blade and the outer blade, and the wheel edge of the driving wheel movably rests on the inner ring of the annular drive strip. During rotation, the driving wheel drives the annular drive strip 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.

5. The circular inner and outer double-edged cutting knife according to claim 4, characterized in that: The wheel edges of a pair of positioning wheels movably abut against the outer ring of the annular driving strip, and the positioning wheels are arranged on both sides of the driving wheel, so that the cutting knife is limitedly clamped by the driving wheel and a pair of positioning wheels, and the positioning wheels are fixedly connected to both sides of the cutter disc through a wheel frame.

6. The circular inner and outer double-edged cutting knife according to claim 5, 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 cutting knife side, the fan blade is coaxially fixedly connected to the driving wheel, the driving wheel synchronously drives the fan blade to rotate during the rotation process, the airflow generated by the rotation of the fan blade is discharged through the exhaust nozzle and acts on the inner blade and the outer blade of the cutting knife, thereby completing the removal of the straw fragments.

7. A circular inner and outer double-edged cutting knife according to any one of claims 1 to 6, characterized in that: The cutting guide plate comprises a feed port and a discharge port, wherein the feed port and the discharge port gradually reduce their diameters as they approach each other, and straw cleaning channels are 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, and a discharge port connected to the straw cleaning channel is provided on the cutting guide plate on the side where the exhaust nozzle outlet faces, and the airflow and the mixed straw cleaning are discharged outwardly through the discharge port.

8. The circular inner and outer double-edged cutting knife according to claim 7, characterized in that: The four corners of the bottom of the frame are fixedly mounted with moving wheels.

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