Medium and small particle size dual-purpose double-variable adjusting seed supply device suitable for high-speed operation

Abstract

The invention discloses a small and medium particle size dual-purpose double-variable regulation seed supply device suitable for high-speed operation, which comprises a seed supply device shell, the upper end of the seed supply device shell is provided with a seed inlet, and the lower end of the seed supply device shell is provided with a seed outlet; the gear motor is mounted on the outer wall of the seed supply device shell; the seed metering shaft is rotationally connected to the interior of the seed supply device shell, and an output shaft of the gear motor is in transmission connection with one end of the seed metering shaft; the seed-metering groove wheel is fixed on the outer side of the seed-metering shaft, and a plurality of seed-metering grooves are distributed in the outer wall of the seed-metering groove wheel; a plurality of sliding bulges are distributed on the inner wall of a central through hole of the length adjusting wheel, and the sliding bulges are connected with the seed metering grooves in a sliding manner; the telescopic device is used for pushing the length adjusting wheel to move in the axial direction of the seed metering grooved wheel; a communication gap is formed between the seed layer adjusting plate and the seed metering grooved wheel. The high-speed seeding machine can realize precise seeding under high-speed work, and is suitable for seeds with different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of seed supply devices, and in particular to a dual-variable regulating seed supply device suitable for high-speed operation and for both small and medium-sized particles. Background Art

[0002] As a key operation link in agricultural production, sowing quality directly affects crop yield. Precision sowing is an important measure to ensure stable, increased and high yield of crops. The important indicator of precision sowing is the sowing amount. The appropriate sowing amount is conducive to the reasonable absorption of nutrients and light by crops, and guarantees the growth needs of crops. Therefore, precise variable sowing is of great significance to promoting large-scale yield increase, ensuring the quality of agricultural products, and helping agriculture to save costs, increase production and increase efficiency. However, in the actual operation process, there are problems such as poor controllability of sowing amount, difficulty in meeting the sowing amount requirements at different stages, insufficient seed supply under high-speed conditions (6-12km / h), and poor compatibility of the seed meter to adapt to the single crop. These problems seriously limit the further improvement of the sowing quality, operation speed and machine utilization rate of the direct sowing machine.

[0003] Although the existing pneumatic seeding devices at this stage can adjust the sowing amount within a certain range, the control factors are single and the sowing amount is changed only by the motor speed. The adjustment error is large and the controllability is poor, making it difficult to meet the stepless variable adjustment under the agronomic requirements of each stage. In terms of operating speed, the current machine operating speed is only 5-8km / h, and under high-speed conditions, the seed "flying" phenomenon is serious due to the influence of centrifugal force, the actual sowing amount is greatly different from the target sowing amount, the seed supply stability is poor, and the problem of insufficient sowing amount is prominent, which limits the machine operating speed, reduces the operating efficiency, and affects the crop yield. In order to improve the utilization rate of the machine and reduce the production cost, the current seeding device can meet the sowing of crops of the same particle size and type, but its compatibility with crops of different particle sizes and types is still relatively low, and in the actual operation process, the method of adapting to the planting of different crops by replacing the hole wheel is complicated to operate and difficult to install.

[0004] Therefore, there is an urgent need in the art for a dual-variable regulating seed supply device suitable for high-speed operation and for both small and medium particle sizes to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-variable adjustable seed supply device for small and medium particle sizes suitable for high-speed operation to solve the problems existing in the above-mentioned prior art. It can realize quantitative sowing during high-speed operation, and the sowing amount can be adjusted without the problem of "flying seeds". It can also be suitable for sowing seeds of different sizes.

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

[0007] The present invention discloses a dual-variable regulating seed supply device suitable for high-speed operation and for both small and medium particle sizes, comprising:

[0008] A seed supply device housing, wherein the upper end of the seed supply device housing is provided with a seed inlet, the seed inlet is used to connect with the seed discharge port of the seed box, the lower end of the seed supply device housing is provided with a seed discharge port, a seed supply chamber and a seed discharge chamber are provided in the seed supply device housing, the seed supply chamber is communicated with the seed inlet, and the seed discharge chamber is communicated with the seed discharge port;

[0009] A reduction motor, the reduction motor being mounted on the outer wall of the seed supply device housing;

[0010] A seeding shaft, the seeding shaft is rotatably connected to the inside of the seed supply device housing, and the output shaft of the reduction motor is drivingly connected to one end of the seeding shaft;

[0011] A seeding groove wheel, wherein the seeding groove wheel is fixed to the outer side of the seeding shaft, and a plurality of seeding grooves are circumferentially distributed on the outer wall of the seeding groove wheel;

[0012] A length adjustment wheel, wherein a plurality of sliding protrusions are circumferentially distributed on the inner wall of the central through hole of the length adjustment wheel, and the sliding protrusions are slidably connected with the seed discharging groove;

[0013] A telescopic device, the telescopic device is used to push the length adjustment wheel to move along the axial direction of the seeding groove wheel;

[0014] A seed layer adjustment plate, wherein the seed layer adjustment plate is fixed in the housing of the seed supply device, a communication gap is provided between the seed layer adjustment plate and the seed discharge groove wheel, and the seed supply chamber and the seed discharge chamber are connected through the communication gap;

[0015] A control terminal, the reduction motor and the telescopic device are both electrically connected to the control terminal.

[0016] Preferably, one end of the length adjustment wheel is provided with an adjustment wheel retaining ring, an adjustment wheel rolling bearing and an adjustment wheel bearing end cover, the outer ring of the adjustment wheel rolling bearing is interference fit with the inner ring of the adjustment wheel retaining ring, the inner ring of the adjustment wheel rolling bearing is interference fit with the outer wall of the length adjustment wheel, and the adjustment wheel retaining ring and the adjustment wheel bearing end cover are fixed by an adjustment wheel screw;

[0017] A fixing hole is provided on a side of the adjusting wheel retaining ring close to the telescopic device, and the telescopic end of the telescopic device is fixedly connected to the fixing hole.

[0018] Preferably, a retaining ring groove is provided on the outer wall of the length adjustment wheel, an elastic retaining ring for a shaft is provided in the retaining ring groove, and one side of the elastic retaining ring for the shaft abuts against the rolling bearing of the adjustment wheel.

[0019] Preferably, the telescopic device is an electric push rod.

[0020] Preferably, the telescopic device is fixed on a support seat, and the support seat is fixed on the inner bottom surface of the outer shell of the seed supply device.

[0021] Preferably, the two ends of the seed supply shaft are respectively connected with a first rolling bearing and a second rolling bearing, the first rolling bearing is arranged between the first bearing seat and the first bearing end cover, the first bearing seat and the first bearing end cover are connected by a first screw, the second rolling bearing is arranged between the second bearing seat and the second bearing end cover, the second bearing seat and the second bearing end cover are connected by a second screw, and the first bearing seat and the second bearing seat are respectively fixed on both sides of the outer shell of the seed supply device.

[0022] Preferably, the seeding shaft and the seeding groove wheel are fixedly connected by fixing screws.

[0023] Preferably, a seed unloading opening is provided on one surface of the shell of the seed supply device, and a seed unloading plate is slidably connected to the seed unloading opening.

[0024] Preferably, the reduction motor is fixed on the motor end cover, and the motor end cover is fixed on the housing of the seed supply device.

[0025] Preferably, the control terminal includes a Raspberry Pi, and a protective shell is provided on the outer side of the Raspberry Pi.

[0026] Compared with the prior art, the present invention has achieved the following technical effects:

[0027] The present invention can adjust the exposed length of the seeding slot on the seeding slot wheel by controlling the extension and contraction of the telescopic device. In this way, the number of seeds contained in a seeding slot can be adjusted to adjust the sowing amount. In addition, when facing high-speed operation, since the required sowing amount is large, each seeding slot can be controlled to contain more seeds. Since the sowing weight is fixed, the speed of the reduction motor can be controlled to slow down, thereby avoiding the problem of "flying seeds". In addition, by adjusting the exposed length of the seeding slot, it can accommodate seeds of different volumes, and the working length of the seeding slot can be adjusted according to the difference in seed particle size to adapt to the sowing of small and medium particle size seeds, improve the crop adaptability of the seed supply device, and the adjustment process does not require disassembly, and the operation is simple and fast.

[0028] From the above, it can be seen that the present invention has strong versatility in sowing types, high precision in large-area unit sowing amount, and a wide range of sowing amount adjustment, realizing precision and variable sowing operations of small and medium-sized particles. The dual variable adjustment method of "adjustment of the working length of the seeding slot on the seeding slot wheel + speed control of the reduction motor" is adopted. Based on the established seeding device speed-seeding slot wheel hole working length-sowing amount relationship model, combined with agronomic requirements and operating speed, the working length of the seeding slot on the seeding slot wheel and the speed of the reduction motor are adjusted in real time to solve the problem of agronomic sowing amount differentiation at each stage.

[0029] Based on the above technology, the invention realizes precise and variable seeding operation under the multi-dimensional requirements of agronomic requirements, operation speed, and crop type, providing technical support for promoting large-scale yield improvement actions. At the same time, the invention also has the characteristics of compact overall structure, small size, easy disassembly, and high integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the actual installation of a dual-variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation in Example 1;

[0032] Figure 2 It is an exploded view of a dual-variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to the first embodiment;

[0033] Figure 3 It is an isometric diagram of a dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to the first embodiment;

[0034] Figure 4 It is a front view of a dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to the first embodiment;

[0035] Figure 5 for Figure 4 sectional view of;

[0036] Figure 6 It is a side cross-sectional view of a dual-variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to the first embodiment;

[0037] Figure 7 It is an isometric view of the seeding groove wheel in the dual-variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation in Example 1;

[0038] Figure 8 It is a front view of the seed discharging groove wheel in the medium and small particle size dual variable adjustment seed supply device suitable for high-speed operation in Example 1;

[0039] Fig. 9 for Figure 8 AA section view in;

[0040] Fig.10 for Figure 8 BB section diagram in;

[0041] Fig.11 for Figure 8 CC profile in ;

[0042] Fig.12 for Figure 8 DD profile in;

[0043] Fig.13 This is a structural schematic diagram of a rotary tiller according to Embodiment 2;

[0044] Fig.14 This is a workflow diagram of the method for accurate broadcasting volume in Example 3;

[0045] In the figure: 1- housing of seed supply device; 2- reduction motor; 3- seeding shaft; 4- seeding groove wheel; 5- length adjustment wheel; 6- electric push rod; 7- seed layer adjustment plate; 8- support seat; 9- seed unloading plate; 10- side plate of seed supply device; 11- adjusting wheel retaining ring; 12- adjusting wheel rolling bearing; 13- adjusting wheel bearing end cover; 14- elastic retaining ring for shaft; 15- motor end cover; 16- first bearing end cover; 17- first rolling bearing; 18- first bearing seat; 19- second bearing seat; 20- second rolling bearing; 21- second bearing end cover; 22- fixing screw; 23- seed box; 24- control terminal; 25- seed guide tube; 26- furrowing plow; 27- furrow opener; 100- dual variable adjustment seed supply device for small and medium particle sizes suitable for high-speed operation; 200- rotary tiller. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The purpose of the present invention is to provide a dual-variable adjustable seed supply device for small and medium particle sizes suitable for high-speed operation to solve the problems existing in the above-mentioned prior art. It can realize quantitative sowing during high-speed operation, and the sowing amount can be adjusted without the problem of "flying seeds". It can also be suitable for sowing seeds of different sizes.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Embodiment 1

[0050] like Figure 1-Figure 12As shown, the present invention provides a dual-variable regulating seed supply device 100 suitable for high-speed operation and for both small and medium particle sizes, comprising:

[0051] The seed supply device housing 1 is a common shell structure, and its purpose is to protect the various components inside it. A seed inlet is provided at the upper end of the seed supply device housing 1, and the seed inlet is used to connect with the seed discharge port of the seed box 23. The seeds in the upper seed box 23 can fall into the seed supply device housing 1 through its seed discharge port. A seed outlet is provided on one side of the lower end of the seed supply device housing 1, and a certain amount of seeds are finally discharged from the seed outlet. A seed supply chamber and a seed discharge chamber are provided in the seed supply device housing 1. The seed supply chamber is adjacent to and connected to the seed inlet, and the seed discharge chamber is adjacent to and connected to the seed outlet.

[0052] The reduction motor 2 can be an existing turbine vortex DC reduction motor 2 , and the main body of the reduction motor 2 is installed on the outer wall of the seed supply device housing 1 .

[0053] The seeding shaft 3 is rotatably connected to the inside of the seed supply device housing 1, and the output shaft of the reduction motor 2 is transmission-connected to one end of the seeding shaft 3. Specifically, a groove matching the output shaft of the reduction motor 2 is provided at one end of the seeding shaft 3 close to the reduction motor 2, so that the output shaft of the reduction motor 2 can be directly plugged into the groove, and the two are interference-fitted, thereby achieving the fixation of the reduction motor 2 and the seeding shaft 3. When the output shaft of the reduction motor 2 rotates, the seeding shaft 3 can be driven to rotate.

[0054] The seeding groove wheel 4 is a cylindrical structure, fixed to the outside of the seeding shaft 3, with a plurality of seeding grooves distributed circumferentially on the outer wall of the seeding groove wheel 4, and the length direction of the seeding grooves is parallel to the axial direction of the seeding groove wheel 4.

[0055] The length adjustment wheel 5 is also a cylindrical structure, and the inner diameter of the length adjustment wheel 5 matches the outer diameter of the seeding groove wheel 4. A plurality of sliding protrusions are distributed circumferentially on the inner wall of the central through hole of the length adjustment wheel 5. The number of sliding protrusions is the same as that of the seeding grooves and they correspond one to one. Each sliding protrusion can be slidably connected with the corresponding seeding groove. When the sliding protrusion slides relative to the seeding groove, the exposed working length of the seeding groove will also change accordingly.

[0056] The telescopic device is used to push the length adjustment wheel 5 to move along the axial direction of the seed groove wheel 4.

[0057] The seed layer adjustment plate 7 is fixed in the seed supply device housing 1. Specifically, the two sides of the seed layer adjustment plate 7 are fixed to the opposite sides of the inner wall of the seed supply device housing 1 by screws. Figure 6As shown, the seed layer adjustment plate 7 is usually tilted, and a communication gap is provided between the seed layer adjustment plate 7 and the seeding groove wheel 4, and the seed supply chamber and the seeding chamber are connected through the communication gap. Furthermore, multiple angle adjustment holes can be provided on both sides of the seed supply device housing 1, and the seed layer adjustment plate 7 can be fixedly connected to different adjustment holes by screws, so that the tilt angle of the seed layer adjustment plate 7 can be adjusted, thereby adjusting the size of the communication gap between the seed layer adjustment plate 7 and the seeding groove wheel 4, and finally the size of the sowing amount can be adjusted.

[0058] The control terminal 24 , the reduction motor 2 and the telescopic device are all electrically connected to the control terminal 24 , and the rotation speed of the reduction motor 2 and the telescopic length of the telescopic device can be controlled through the control terminal 24 .

[0059] In actual use, the speed of the reduction motor 2 and the telescopic length of the telescopic device are adjusted as needed, so as to determine the exposed working length of the seeding slot, thereby determining how many seeds each seeding slot can accommodate, that is, determining the sowing amount. The seeds from the seed box 23 first enter the seed supply chamber through the seed inlet, and the reduction motor 2 drives the seeding slot wheel 4 and the length adjustment wheel 5 to rotate synchronously through the seeding shaft 3. A certain amount of seeds will enter the corresponding seeding slot, and under the rotation of the seeding slot wheel 4, the seeds will enter the seeding chamber and finally fall out from the seed outlet.

[0060] This embodiment can adjust the working length of the seeding slot by controlling the telescopic length of the telescopic device. When the working length of the seeding slot (i.e., the exposed length) becomes longer, the control terminal 24 can reduce the rotation speed of the seeding shaft 3, thereby solving the "flying seeds" problem caused by the excessive rotation speed of the seeding slot wheel 4 and ensuring the accuracy of the sowing amount. At the same time, the working length of the seeding slot can also be adjusted according to the difference in seed particle size, so as to adapt to the sowing of small and medium particle size seeds, improve the compatibility of the device with various crops, and the adjustment process does not need to be disassembled, and the operation is simple and quick. In addition, the reduction motor 2 is used to directly drive the seeding slot wheel 4, simplifying the transmission structure, removing the coupling, and avoiding the problem of low sowing amount accuracy due to large coaxiality installation error.

[0061] In this embodiment, if Figure 5 and Fig.11As shown, the end of the length adjustment wheel 5 away from the reduction motor 2 is provided with a stepped portion, and the end of the length adjustment wheel 5 away from the reduction motor 2 is provided with an adjustment wheel retaining ring 11, an adjustment wheel rolling bearing 12 and an adjustment wheel bearing end cover 13, and the adjustment wheel retaining ring 11, the adjustment wheel rolling bearing 12 and the adjustment wheel bearing end cover 13 are arranged at the stepped portion. The outer ring of the adjustment wheel rolling bearing 12 is interference fit with the inner ring of the adjustment wheel retaining ring 11, and the inner ring of the adjustment wheel rolling bearing 12 is interference fit with the outer wall of the small diameter end of the stepped portion of the length adjustment wheel 5, so as to achieve the fixing of the adjustment wheel rolling bearing 12, and the adjustment wheel rolling bearing 12 can use the existing 6006-2Zb rolling bearing. The adjustment wheel retaining ring 11 and the adjustment wheel bearing end cover 13 are fixed by the adjustment wheel screw, so as to protect the adjustment wheel rolling bearing 12.

[0062] from Figure 2 and Figure 7 It can be seen that a fixing hole is provided on the side of the adjusting wheel retaining ring 11 close to the telescopic device, and the telescopic end of the telescopic device is fixedly connected to the fixing hole. When the telescopic end of the telescopic device performs telescopic movement, it can drive the adjusting wheel retaining ring 11, the adjusting wheel rolling bearing 12 and the adjusting wheel bearing end cover 13 to move synchronously, and finally drive the length adjusting wheel 5 to move back and forth linearly, so as to adjust the working length of the seeding slot.

[0063] In this embodiment, a retaining ring groove is provided on the outer wall of the length adjustment wheel 5, and a shaft elastic retaining ring 14 is provided in the retaining ring groove. The shaft elastic retaining ring 14 is located between the adjusting wheel retaining ring 11 and the adjusting wheel bearing end cover 13, and one side of the shaft elastic retaining ring 14 is against the adjusting wheel rolling bearing 12, thereby limiting the adjusting wheel rolling bearing 12.

[0064] In this embodiment, the telescopic device includes but is not limited to the existing electric push rod 6, and can also use a device with a telescopic function such as a cylinder or a hydraulic cylinder.

[0065] In this embodiment, the telescopic device is fixed on the support seat 8, and the support seat 8 is fixed to the inner bottom surface of the seed supply device housing 1 by screws. The upper surface of the support seat 8 is provided with an arc-shaped contact surface matching the side wall of the seed groove wheel 4, so as to facilitate the rotation of the seed groove wheel 4 on its upper surface.

[0066] In this embodiment, in order to realize that the seeding shaft 3 is rotatably connected to the seed supply device housing 1, as shown in FIG. Figure 5As shown, the two ends of the seeding shaft 3 are respectively connected with a first rolling bearing 17 and a second rolling bearing 20, and both of the first rolling bearing 17 and the second rolling bearing 20 are existing 6002-2RZ rolling bearings, and the inner rings of the first rolling bearing 17 and the second rolling bearing 20 are respectively interference fit with the two ends of the seeding shaft 3. The first rolling bearing 17 is arranged between the first bearing seat 18 and the first bearing end cover 16, and the first bearing seat 18 and the first bearing end cover 16 are connected by a first screw. The second rolling bearing 20 is arranged between the second bearing seat 19 and the second bearing end cover 21, and the second bearing seat 19 and the second bearing end cover 21 are connected by a second screw. The first bearing seat 18 and the second bearing seat 19 are respectively fixed to the two sides of the seed supply device housing 1. As shown Figure 2 As shown, the first bearing seat 18 is installed on the left side of the figure, that is, on the same side as the reduction motor 2; and the second bearing seat 19 is fixed to the side plate 10 of the seed supply device by screws, and the side plate 10 of the seed supply device is fixed to the right side surface of the seed supply device housing 1 by screws, and the side plate 10 of the seed supply device is provided with a through hole for the seed discharge shaft 3 to pass through.

[0067] In this embodiment, the seeding shaft 3 and the seeding groove wheel 4 are clearance-matched, and in order to achieve the fixation of the seeding shaft 3 and the seeding groove wheel 4, connecting holes are provided at corresponding positions of the seeding shaft 3 and the seeding groove wheel 4, and the seeding shaft 3 and the seeding groove wheel 4 are fixedly connected by fixing screws 22, that is, the fixing screws 22 are connected to the connecting holes of the seeding shaft 3 and the seeding groove wheel 4 in turn.

[0068] In this embodiment, if Figure 2 As shown, a seed discharging opening is provided on one side of the seed supply device housing 1, and a chute is provided at the seed discharging opening, and a seed discharging plate 9 is slidably connected to the chute at the seed discharging opening. Figure 6 As shown, the seed unloading plate 9 is located at one side of the seed supply chamber. After the sowing work is completed, some seeds may remain in the seed supply chamber. At this time, the seed unloading plate 9 can be opened to take out all the seeds in the seed supply chamber.

[0069] Further, a connecting hole can also be set on the corresponding position of the seed unloading plate 9 and the seed supply device shell 1, and then the two are fixed by screws. In the course of work, the screws on the seed unloading plate 9 can be tightened to prevent the seed unloading plate 9 from sliding out.

[0070] In this embodiment, if Figure 2 and Figure 5 As shown, the reduction motor 2 is fixed on the motor end cover 15, and the motor end cover 15 is fixed on the seed supply device housing 1, so as to achieve the fixation of the reduction motor 2.

[0071] In this embodiment, the control terminal 24 includes a Raspberry Pi and a power supply. A protective shell is provided on the outside of the Raspberry Pi, and the protective shell is used to achieve technical effects such as circuit fixation, dust and water resistance, while the power supply provides power to the Raspberry Pi, and the Raspberry Pi is used to achieve precise control of the reduction motor 2 and the electric push rod 6.

[0072] This embodiment has the following advantages:

[0073] 1. The dual variable adjustment technology scheme of "adjustment of the working length of the seed trough + speed control of the reduction motor 2" is adopted to establish a relationship model between the speed of the reduction motor 2-the working length of the seed trough-the sowing amount, and a method for precise control of the sowing amount is proposed. The sowing amount adjustment range is wider, which solves the problem of differentiated agronomic sowing amounts at different stages.

[0074] 2. This embodiment solves the "flying seeds" problem caused by the excessively high rotation speed of the seeding groove wheel 4 by increasing the effective working length of the seeding groove and reducing the rotation speed of the seeding shaft 3, thereby ensuring the accuracy of the seeding amount and adapting to high-speed (6-12km / h) working conditions, thereby greatly improving the operating efficiency of the machine.

[0075] 3. The seeding groove wheel 4 can adjust the working length of the seeding groove according to the difference in seed particle size, which is suitable for sowing small and medium-sized seeds. The adjustment process does not require disassembly of the device, and the operation is simple. It is more convenient and quicker than the existing method of changing crop types by replacing the hole wheel.

[0076] 4. The seeds are supplied by directly driving the seeding groove wheel 4 with a reduction motor 2, which simplifies the transmission structure, removes the coupling, and avoids the problem of low seeding accuracy due to large coaxial installation errors. The overall structure of the device is more compact, small, and easy to disassemble.

[0077] 5. While the length adjustment wheel 5 moves laterally on the seeding groove wheel 4, it can also rotate along the central axis of the seeding shaft 3, thereby improving the adaptive ability of the device and creating conditions for the intelligent operation of the device.

[0078] Embodiment 2

[0079] like Fig.13 As shown, the present invention provides a rotary tiller 200, which is different from the existing rotary tiller 200 in that it includes the dual-variable adjustable seed supply device 100 for small and medium particle sizes suitable for high-speed operation disclosed in the first embodiment.

[0080] like Fig.13As shown, the dual-variable regulating seed supply device 100 for small and medium-sized particles suitable for high-speed operation in the first embodiment is arranged at the lower end of the seed box 23, and the seed outlet of the dual-variable regulating seed supply device 100 for small and medium-sized particles suitable for high-speed operation is connected to a distributor (essentially a nine-way) through a seed discharge pipe, and a blower is provided on the seed discharge pipe to transport the seeds from the seed outlet of the dual-variable regulating seed supply device 100 for small and medium-sized particles suitable for high-speed operation to the other eight interfaces in the nine-way, and then the eight interfaces are respectively connected to a seed guide pipe 25 for discharging the seeds into the soil ditch below. Of course, the bottom of the rotary tiller 200 is also provided with a furrowing plow 26 and a furrow opener 27, and the control terminal 24 is also installed on the rotary tiller 200, but these are all existing technologies, so the specific structure thereof will not be further described here.

[0081] Embodiment 3

[0082] like Fig.14 As shown, this embodiment provides a method for accurate seeding amount, based on the dual-variable regulating seed supply device 100 for both small and medium particle sizes suitable for high-speed operation disclosed in the first embodiment.

[0083] Before the sowing operation, the speed of the reduction motor 2-the working length of the seeding slot-the sowing amount relationship model is tested and established. When the sowing amount relationship model is constructed, the speed of the reduction motor 2, the working length of the seeding slot and the response surface of the sowing amount are established through bench tests to obtain a mathematical model, and the model is imported into the control terminal 24. According to the operating speed of the machine and the agronomic requirements, the speed of the reduction motor 2 and the working length of the seeding slot are adjusted in real time to complete the adaptive precision variable seed supply process. The three major problems of the differentiation of agronomic sowing amounts at each stage, the instability of high-speed seed supply, and the poor adaptability of the seeding device to a single crop are solved, and the precise and variable sowing operation of the seed supply device under the multi-dimensional requirements of agronomic requirements, operating speed, and crop type is realized, and the operating efficiency is improved. At the same time, the device has the characteristics of compact overall structure, small size, easy disassembly, and high integration.

[0084] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dual variable regulating seed supply device suitable for high-speed operation and for both small and medium particle sizes, characterized in that: include: A seed supply device housing, wherein the upper end of the seed supply device housing is provided with a seed inlet, the seed inlet is used to connect with the seed discharge port of the seed box, the lower end of the seed supply device housing is provided with a seed discharge port, a seed supply chamber and a seed discharge chamber are provided in the seed supply device housing, the seed supply chamber is communicated with the seed inlet, and the seed discharge chamber is communicated with the seed discharge port; A reduction motor, the reduction motor being mounted on the outer wall of the seed supply device housing; A seeding shaft, the seeding shaft is rotatably connected to the inside of the seed supply device housing, and the output shaft of the reduction motor is drivingly connected to one end of the seeding shaft; A seeding groove wheel, wherein the seeding groove wheel is fixed to the outer side of the seeding shaft, and a plurality of seeding grooves are circumferentially distributed on the outer wall of the seeding groove wheel; A length adjustment wheel, wherein a plurality of sliding protrusions are circumferentially distributed on the inner wall of the central through hole of the length adjustment wheel, and the sliding protrusions are slidably connected with the seed discharging groove; A telescopic device, the telescopic device is used to push the length adjustment wheel to move along the axial direction of the seeding groove wheel; A seed layer adjustment plate, wherein the seed layer adjustment plate is fixed in the housing of the seed supply device, a communication gap is provided between the seed layer adjustment plate and the seed discharge groove wheel, and the seed supply chamber and the seed discharge chamber are connected through the communication gap; A control terminal, the reduction motor and the telescopic device are both electrically connected to the control terminal.

2. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1 is characterized in that: One end of the length adjustment wheel is provided with an adjustment wheel retaining ring, an adjustment wheel rolling bearing and an adjustment wheel bearing end cover, the outer ring of the adjustment wheel rolling bearing is interference fit with the inner ring of the adjustment wheel retaining ring, the inner ring of the adjustment wheel rolling bearing is interference fit with the outer wall of the length adjustment wheel, and the adjustment wheel retaining ring and the adjustment wheel bearing end cover are fixed by an adjustment wheel screw; A fixing hole is provided on a side of the adjusting wheel retaining ring close to the telescopic device, and the telescopic end of the telescopic device is fixedly connected to the fixing hole.

3. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 2, characterized in that: A retaining ring groove is arranged on the outer wall of the length adjusting wheel, an elastic retaining ring for a shaft is arranged in the retaining ring groove, and one side of the elastic retaining ring for a shaft abuts against the rolling bearing of the adjusting wheel.

4. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1 is characterized in that: The telescopic device is an electric push rod.

5. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1 is characterized in that: The telescopic device is fixed on a support seat, and the support seat is fixed on the inner bottom surface of the outer shell of the seed supply device.

6. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1, characterized in that: The two ends of the seed supply shaft are respectively connected with a first rolling bearing and a second rolling bearing, the first rolling bearing is arranged between the first bearing seat and the first bearing end cover, the first bearing seat and the first bearing end cover are connected by a first screw, the second rolling bearing is arranged between the second bearing seat and the second bearing end cover, the second bearing seat and the second bearing end cover are connected by a second screw, and the first bearing seat and the second bearing seat are respectively fixed on both sides of the outer shell of the seed supply device.

7. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1, characterized in that: The seeding shaft and the seeding groove wheel are fixedly connected by fixing screws.

8. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1, characterized in that: A seed unloading opening is arranged on one surface of the seed supply device shell, and a seed unloading plate is slidably connected to the seed unloading opening.

9. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1, characterized in that: The reduction motor is fixed on the motor end cover, and the motor end cover is fixed on the shell of the seed supply device.

10. The dual variable regulating seed supply device for small and medium particle sizes suitable for high-speed operation according to claim 1, characterized in that: The control terminal comprises a Raspberry Pi, and a protective shell is arranged on the outer side of the Raspberry Pi.

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