A rice and wheat dual-purpose high-speed rotary disc precision seed metering device

Abstract

The application discloses a rice and wheat dual-purpose high-speed rotary disc type precision seed sowing device, which comprises a base, an upper end cover, a rotary material distributing disc assembly and a seed outlet channel, wherein the seed outlet channel is arranged downward through the base; a seed supply box is embedded and arranged on the upper end cover; a seed supply box upper cover is arranged on the seed supply box; a rotary material distributing part is arranged in the seed supply box; an arch breaking cone is arranged on the rotary material distributing part, and the cone end of the arch breaking cone is arranged upward through the seed supply box upper cover; a plurality of seed inlet openings are arranged on the seed supply box upper cover; a plurality of seed outlet openings are arranged at the bottom of the seed supply box, and the seed outlet openings are arranged corresponding to the rotary material distributing disc assembly. The seed sowing device can realize the requirements of sowing three crops of rice, wheat and rape, accurate adjustment of seed supply amount and high-speed operation sowing, and realizes the cost reduction and benefit increase of the sowing link. In addition, all the components of the seed sowing device are modularly designed, the whole device is convenient to disassemble and assemble, and is easy to maintain and clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural seeding machinery equipment, in particular to a rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device. BACKGROUND

[0002] The middle and lower reaches of the Yangtze River is an important rice-oil and rice-wheat rotation area in China. Due to the single function of the existing seeding machine and the insufficient stability of high-speed seed metering, there are problems such as low utilization rate of machine tools and insufficient high-speed seed metering compatibility. As the core component of the seeding machine, the research and design of a dual-purpose seed metering device that meets the requirements of "one device for multiple purposes" and improves the utilization rate of agricultural tools is an effective way to promote the mechanized planting of rice, wheat and oilseed rape.

[0003] The centrifugal seed metering device has simple structure and low cost, and the centrifugal force generated by the rotation of the device is used to realize the seed metering process. However, due to the significant differences in mechanical and physical properties, seeding requirements, etc. of rice, wheat and oilseed rape seeds, the key components such as the seed supply device, the seed distribution device and the seed metering device of the traditional centrifugal seed metering device cannot simultaneously meet the seeding requirements of the above three crops. Moreover, the traditional centrifugal seed metering device relies entirely on centrifugal force for seed distribution, and its operating speed is generally lower than 5km / h due to the working principle, which cannot achieve high-speed operation. Therefore, the traditional centrifugal seed metering device has the problems of poor universality and difficulty in achieving high-speed seeding operation. SUMMARY

[0004] The present application aims to solve the problems existing in the prior art, and provides a rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] A rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device, comprising a base, an upper end cover with a containing cavity is arranged on the base, a rotary material discharge disc assembly is arranged in the range of the containing cavity of the base, and a plurality of seed outlet channels are arranged on the periphery of the edge of the rotary material discharge disc assembly, the seed outlet channels penetrate through the base and are arranged downward; a seed supply box is embedded and installed on the upper end cover, an upper cover of the seed supply box is arranged on the seed supply box, a rotary material distribution piece is arranged in the seed supply box, an arch breaking cone is arranged on the rotary material distribution piece, and the tapered end of the arch breaking cone penetrates through the upper cover of the seed supply box upward; a plurality of seed inlet openings are arranged on the upper cover of the seed supply box, a plurality of seed outlet openings are arranged at the bottom of the seed supply box, and the seed outlet openings correspond to the rotary material discharge disc assembly.

[0007] The improved rotary disc assembly and the seed supply box of the rice and wheat dual-purpose high-speed rotary disc precision seed metering device can realize the requirements of three crops of rice, wheat and rape, accurate and adjustable seed supply amount, high-speed operation and seeding, and the efficiency of the seeding process is improved.

[0008] The base and the upper end cover are connected to form a containing cavity for containing the rotary disc assembly and the seed supply box, and the seed distribution, dispersion and adjustment in the containing cavity can create favorable conditions for high-speed and accurate seeding.

[0009] The rotary disc assembly can uniformly distribute seeds to the seed outlet channels, and the seeds are sown through the multiple seed outlet channels; the seed outlet channels are arranged at the bottom of the base and penetrate downward, which can better distribute and sow seeds; in the prior art, the seed distribution holes are arranged on the sidewall of the seed metering device, and the seeds are distributed by centrifugal force; if the centrifugal force is too large, the impact force of the seeds on the sidewall is large, and if the centrifugal force is too small, the seeds cannot be distributed smoothly; however, in the present application, the seed outlet channels are arranged at the bottom of the seed metering device, and the seeds are distributed under the combined action of gravity and centrifugal force, and mainly by gravity, which can effectively reduce the collision between the seeds and the inner wall of the seed metering device (the inner wall of the upper end cover).

[0010] The seed supply box, the upper cover of the seed supply box and the rotary distribution part are arranged to form a grid type seed supply, and the seed supply amount can be accurately adjusted according to the seeding requirements of different crops; by changing the size of the seed inlet of the seed supply box and the volume of the internal cavity, the seed taking amount and the seed supply amount of the rotary distribution part rotating one revolution with the main shaft are changed to adapt to the seeding requirements of different crops, and only the rotary main body with different lengths of fan blades of the rotary distribution part needs to be designed and the size of the seed inlet of the upper cover of the seed supply box needs to be changed, without changing the seed supply box body. In actual work, for different crops, the corresponding rotary distribution part module can be replaced according to the seeding amount per mu required by the crop, and the replacement method is simple and easy to operate.

[0011] Further, the rotary disc assembly includes an arch-shaped dome and a truncated cone-shaped disc body, the dome and the disc body are smoothly transitioned, a plurality of involute guide vanes are arranged on the disc body and inclined from the intersection of the dome and the disc body to the lower edge of the disc body.

[0012] In view of the problems of poor seed distribution uniformity, long seed transport path and inability to high-speed seeding of the existing seed metering device, the rotary disc assembly of the present application designs a dome-type rotary disc with an octagonal involute guide vane curve, and the seed metering device uniformly distributes seeds under the combined action of centrifugal force and guide vane curve, which realizes the goals of uniform seed distribution, short transport path, low loss and high-speed seeding.

[0013] Further, the involute guide vanes are uniformly distributed in 6-10, and the corresponding seed outlet channels are also provided with 6-10, the spacing between the lower edges of adjacent involute guide vanes is not less than the opening length of the seed outlet channel; the height of the involute guide vane is 5-12mm, and the taper angle of the disc body is 22°-30°. Under this angle, the guide vane has strong constraint ability on the seed, the movement distance of the seed along the trajectory is short, which meets the requirement of short-range seed sowing.

[0014] Further, the seed outlet channel comprises a seed outlet cavity provided in the base and a seed outlet guide cavity provided below the base, the seed outlet cavity and the seed outlet guide cavity are communicated, and the inner wall of the seed outlet cavity is inclined. When the seed is separated from the rotating material distribution disc assembly, it makes a flat throwing motion, the left and right side slide angles of the seed outlet cavity are greater than the sliding friction angle of the seed and the seed sowing device material, the seed outlet cavity is a inclined ladder structure, which meets the trajectory of the seed making a flat throwing motion.

[0015] Further, the seed supply box comprises a seed supply box cylinder, the bottom of the seed supply box cylinder is provided with a seed supply box bottom plate, and the upper part is provided with a seed supply box connecting flange, the seed supply box cylinder is sleeved in the upper end cover, the seed supply box connecting flange is located above the upper end cover and is connected and fixed with the seed supply box upper cover on the upper end cover, a plurality of seed outlets are arranged on the seed supply box bottom plate, and the rotating material distribution part is arranged in the seed supply box cylinder.

[0016] By such arrangement, the seed supply box cylinder can be embedded and mounted on the upper end cover, the seed supply box connecting flange and the seed supply box upper cover are connected and fixed on the upper end cover through bolts or screws, which is convenient for installation and disassembly, and is conducive to replacement of the rotating material distribution part and the seed supply box upper cover.

[0017] Further, the rotating material distribution part comprises a rotating cylinder, a plurality of blades are arranged on the outer periphery of the rotating cylinder, and the breaking arch cone is arranged above the rotating cylinder. The blades are rectangular fans, and the rectangular fan blades can divide the inner cavity of the seed supply box cylinder into a plurality of grid cavities.

[0018] Further, the base and the upper end cover are connected through a plurality of lugs arranged on the outer periphery, and the lower part of the base is further provided with a support.

[0019] Further, the middle part of the base is provided with a base boss, and the inner periphery of the lower edge of the upper end cover is provided with a plurality of small bosses.

[0020] Further, the drive spindle is connected through the base and drives the rotating discharge disc assembly, the upper end of the drive spindle is connected through the seed supply box and drives the arch breaking cone; the drive spindle is connected with a step drive motor. One drive spindle can connect the rotating discharge disc assembly, the rotating distributing part and the arch breaking cone at the same time, and drive them to rotate at the same time. The model of the rotating distributing part is determined for the same crop, the amount of seeds taken and supplied by the rotating distributing part per unit time is controlled by changing the rotating speed of the drive spindle, so that the seeding amount is accurately adjustable.

[0021] Further, the control system comprises a power module, a controller and a seed metering drive module, the controller is electrically connected with the power module, the seed metering drive module and a control panel, the seed metering drive module comprises a step motor driver and a step drive motor, after the working parameters of the seed metering device are set on the control panel, the controller converts the parameter information into pulse signals and transmits the pulse signals to the step motor driver.

[0022] Compared with the prior art, the beneficial effects of the present application are: 1. The rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device can realize the requirements of three crops of rice, wheat and oilseed rape, accurate and adjustable seed supply amount and high-speed operation seeding through the improvement of the rotating discharge disc assembly and the seed supply box, realizes the cost reduction and efficiency increase of the seeding link, and each part of the seed metering device is modularly designed, the whole is easy to disassemble and install, easy to maintain and clean, and the operation and control are simple and convenient; 2. The seed outlet channel is arranged at the bottom of the base and is arranged downwardly, which can seed under the combined action of gravity and centrifugal force, and mainly relies on gravity to seed, which can effectively reduce the collision between the seed and the inner wall (upper end cover) of the seed metering device; 3. The arrangement of the seed supply box, the upper cover of the seed supply box and the rotating distributing part can form a grid type seed supply, and the accurate adjustment of the seed supply amount can be realized according to the seeding requirements of different crops; the amount of seeds taken and supplied by the rotating distributing part per revolution of the main shaft is changed by changing the size of the seed inlet of the seed supply box and the volume of the internal cavity, so as to adapt to the seeding requirements of different crops, and only the rotating main body with different fan blade lengths of the rotating distributing part needs to be designed according to the seeding amount, and the size of the seed inlet of the upper cover of the seed supply box needs to be changed, without changing the seed supply box body; 4. The rotating discharge disc assembly is designed as a dome-shaped rotating disc with an octagonal involute guide vane curve, the seed metering device uniformly distributes seeds under the combined action of centrifugal force and guide vane curve constraint, and the goals of uniform seed distribution, short distance, low loss and high-speed seeding are realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the present application, a rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device;

[0024] Figure 2 It is an explosion structure schematic view of a rice and wheat oil compatible high-speed rotary disc type precision seed metering device of the present application;

[0025] Figure 3 It is a sectional view structure schematic view of a rice and wheat oil compatible high-speed rotary disc type precision seed metering device of the present application;

[0026] Figure 4 It is a bottom structure schematic view of the present application;

[0027] Figure 5 It is a bottom structure schematic view of the present application;

[0028] Figure 6 It is a structure schematic view of a rotary material discharging disc assembly in the present application;

[0029] Figure 7 It is a structure schematic view of a seed supply box and a seed supply box upper cover cooperating connection in the present application;

[0030] Figure 8 It is a structure schematic view of a seed supply box upper cover in the present application;

[0031] Figure 9 It is a structure schematic view of a seed supply box in the present application;

[0032] Figure 10 It is a structure schematic view of a rotary material discharging disc assembly in the present application;

[0033] Figure 11 It is a flow schematic view of a rice and wheat oil compatible high-speed rotary disc type precision seed metering device control system of the present application

[0034] In the figure: 1, upper end cover; 101, small boss; 2, rotary material discharging disc assembly; 201, dome; 202, disc body; 203, involute guide vane; 204, sleeve; 205, key groove; 3, base; 301, base boss; 4, lug; 5, support; 6, electric control box; 7, stepping drive motor; 8, shaft coupling; 9, driving main shaft; 10, seed supply box; 1001, seed supply box cylinder; 1002, seed supply box connecting flange; 1003, seed outlet; 11, seed supply box upper cover; 1101, seed inlet; 12, rotary material discharging piece; 1201, rotary cylinder; 1202, vane; 1203, arch breaking cone; 13, containing cavity; 14, seed outlet channel; 1401, seed outlet cavity; 1402, seed outlet guide cavity. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only some 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 of ordinary skill in the art without creative effort belong to the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "intermediate", "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] As shown in Figures 1-3 A rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device, comprising a base 3, an upper end cover 1 with a containing cavity 13 is arranged on the base 3, a rotary material distribution disc assembly 2 is arranged in the containing cavity 13 of the base 3, and a plurality of seed outlet channels 14 are arranged on the periphery of the edge of the rotary material distribution disc assembly 2, the seed outlet channels 14 penetrate through the base 3 and are arranged downward; a seed supply box 10 is embedded and arranged on the upper end cover 1, a seed supply box upper cover 11 is arranged on the seed supply box 10, a rotary material distribution piece 12 is arranged in the seed supply box 10, an arch breaking cone 1203 is arranged on the rotary material distribution piece 12, and the tapered end of the arch breaking cone 1203 penetrates through the seed supply box upper cover 11 upward; a plurality of seed inlet openings 1101 are arranged on the seed supply box upper cover 11, and a plurality of seed outlet openings 1003 are arranged on the bottom of the seed supply box 10, corresponding to the rotary material distribution disc assembly 2.

[0038] The rice-wheat-oil dual-purpose high-speed rotary disc precision seed metering device can realize the requirements of three crop compatible seeding of rice, wheat and oilseed rape, accurate adjustment of seed supply amount and high-speed operation seeding through the improvement of the rotary material distribution disc assembly 2 and the seed supply box 10, realizes the cost reduction and efficiency increase of the seeding link, and each component of the seed metering device is modularly designed, the whole is convenient to disassemble and install, easy to maintain and clean, and the operation and control are simple and convenient.

[0039] The connection of the base 3 and the upper end cover 1 can form a containing cavity containing the rotary material distribution disc assembly 2 and the seed supply box 10, and the seed metering, dispersion and adjustment in the containing cavity can create favorable conditions for high-speed precision seeding.

[0040] The rotating discharge disc assembly 2 can uniformly discharge seeds to the seed outlet channels 14, and the seeds are sown by the seed outlet channels 14 respectively. The seed outlet channels 14 are arranged at the bottom of the base 3 and penetrate downward, which can better discharge and sow seeds. In the prior art, the seed discharge holes are arranged on the side wall of the seed discharge device, and the seeds are discharged completely by the centrifugal force. If the centrifugal force is too large, the impact force of the seeds on the side wall is large, and if the centrifugal force is too small, the seeds cannot be discharged smoothly. However, in the present application, the seed outlet channels 14 are arranged at the bottom of the seed discharge device, and the seeds are discharged under the joint action of gravity and centrifugal force, and mainly by gravity, which can effectively reduce the collision between the seeds and the inner wall (the inner wall of the upper end cover) of the seed discharge device.

[0041] The seed supply box 10, the seed supply box upper cover 11 and the rotating seed distribution member 12 can form a grid type seed supply, and the seed supply amount can be accurately adjusted according to the sowing requirements of different crops. By changing the size of the seed inlet 1101 of the seed supply box and the volume of the internal cavity, the seed taking amount and the seed supply amount of the rotating seed distribution member 12 rotating one circle around the main shaft can be changed to adapt to the sowing requirements of different crops. Only the rotating main body with different lengths of the rotating seed distribution member 12 needs to be designed according to the sowing amount, and the size of the seed inlet 1101 of the seed supply box upper cover needs to be changed, without changing the seed supply box body. In actual work, for different crops, the corresponding rotating seed distribution member module can be replaced according to the sowing amount per mu of the agricultural requirements, and the replacement method is simple and easy to operate.

[0042] In some embodiments, the seed supply box upper cover 11 is circumferentially opened four fan-shaped seed inlets 1101, and the seeds flow in from the seed inlets 1101. The seed supply box upper cover 11 is connected with the seed supply box 10 to form a cavity, and the seed inlets 1101 of the seed supply box upper cover 11 are staggered with the seed outlets 1003 of the bottom surface of the seed supply box. The seed outlets 1003 are also fan-shaped openings, and the size of the openings is larger than that of the seed inlets 1101.

[0043] In order to ensure the continuity of the seed supply of the seed supply box, the arch breaking cone 1203 is arranged, the arch breaking cone 1203 penetrates through the through hole in the middle of the seed supply box upper cover 11, and the lower edge of the cone body of the arch breaking cone 1203 is flush with the bottom surface of the seed supply box upper cover 11. The taper angle of the arch breaking cone 1203 is 45°.

[0044] By comparing and analyzing the natural rest angle of the seeds of rice, wheat and rape, it is concluded that the natural rest angle of the seeds of rice is the largest. The calculation shows that the top angle of the arch breaking cone should be less than 109°. Considering comprehensively, the inclination angle of the arch breaking cone is 45°, the arch breaking cone extends into the bottom of the seed box, disturbs the seeds in the bottom of the seed box, ensures the continuity of the seeds flowing into the seed supply box from the seed inlets during the work, and can effectively prevent the phenomena of broken strips and missed sowing during the work of the seed discharge device.

[0045] Further, in combination with Figure 6 As shown in the figure, the rotating material discharging disc assembly 2 comprises an arch-shaped dome 201 and a truncated cone-shaped disc body 202, and the dome 201 and the disc body 202 are smoothly connected. A plurality of involute guide vanes 203 are arranged on the disc body 202, and the involute guide vanes 203 are arranged obliquely from the intersection of the dome 201 and the disc body 202 to the lower edge of the disc body 202.

[0046] In view of the problems of poor seed distribution uniformity, long seed transport path and inability to high-speed seeding of the existing seed metering device, the rotating material discharging disc assembly 2 of the present application designs a dome-shaped rotating disc with an octagonal involute guide vane curve. The seed metering device is uniformly distributed under the joint action of centrifugal force and guide vane curve constraint, and the goal of uniform distribution, short-range low-loss and high-speed seeding is achieved.

[0047] The rotating material discharging disc assembly 2 is arranged in a dome shape at the upper part and a positive cone shape at the lower part, which can reduce the collision and wear of the seeds. By analyzing the movement of the seeds on the dome surface, it is concluded that under the condition that the rotation speed n and the friction factor μ are constant, the acceleration obtained by the seeds on the dome surface is smaller than that of the positive cone disc, so that the speed of the seeds at the moment of contact with the guide vanes is smaller, thereby generating smaller collision and energy loss.

[0048] Further, the involute guide vanes 203 are uniformly distributed in 6-10, and the corresponding seed outlet channels 14 are also arranged in 6-10. The distance between the lower edges of adjacent involute guide vanes 203 is not less than the opening length of the seed outlet channel 14. The height of the involute guide vane 203 is 5-12 mm, and the taper angle of the disc body 202 is 22°-30°.

[0049] By kinematic analysis of the movement of the seeds along the octagonal involute guide vane, the absolute speed of the seed particles on the disc body can be obtained as follows:

[0050] Therefore, the absolute speed v of the seed particles a is mainly affected by the disc body rotation speed ω, the radius r of the seed particles, the absolute speed direction angle θ and the guide vane tangent angle δ. Compared with the existing guide vanes, the octagonal involute guide vane curve has a fixed angle, the absolute speed direction angle of the seeds is unchanged, and the seeds only do acceleration motion along the guide vanes in this process. At this angle, the guide vanes have strong constraint ability on the seeds, and the seeds have a short movement path along the trajectory, which meets the requirement of short-range seed distribution.

[0051] Preferably, to ensure that the seeds do not fall off the disc 202 during the movement of the disc 202 from the surface to the base, the taper angle of the disc 202 should be smaller than the sliding friction angle of the seeds. By comparing and analyzing the sliding friction angles of the seeds of rice, wheat and rapeseed, it is found that the sliding friction angle of the seeds of rapeseed is the smallest. Therefore, the taper angle of the regular cone (disc) is 25°, the disc surface is provided with 8 octagonal involute guide vanes, the height of the guide vanes is 10mm, the starting position of the guide vanes is the joint between the dome and the disc, the distance from the center of the disc is 58mm, the end plane of the guide vanes is on the same plane with the outermost edge of the disc and cooperates with the small boss on the inner wall of the upper end cover, and the involute guide vanes 203 have strong constraint on the seeds, effectively shorten the migration path of the seeds, and meet the requirements of short-distance seed metering.

[0052] Further, as shown in Figure 5 Further, as shown in

[0053] The seeds make a flat throwing motion when they are separated from the rotating material discharging disc assembly 2, the left and right side slide angles of the seed discharging cavity 1401 are greater than the sliding friction angles of the seeds and the seed metering device material, the seed discharging cavity 1401 has a trapezoidal structure, and meets the trajectory of the flat throwing motion of the seeds.

[0054] The inner edge of the inlet of the seed discharging cavity 1401 coincides with the outer edge of the bottom surface of the disc 202, the seeds enter the seed discharging cavity 1401 at the moment when they are separated from the constraint of the involute guide vanes 203, the seed discharging cavity 1401 has a trapezoidal structure, which meets the migration trajectory of the seeds, can effectively reduce the collision of the seeds during the seed metering process, and reduces the breakage rate of the seeds; the seed discharging cavity is in communication with the containing cavity, the lower end is in communication with the seed discharging guide cavity 1402, the seed discharging guide cavity 1402 is a hollow cylinder, the outer wall diameter is 24mm, the inner wall diameter is 20mm, and the seeds are discharged from here.

[0055] Further, as shown in Figures 7-9 Further, as shown in

[0056] Through such setting, the seed supply box cylinder 1001 can be embedded and installed on the upper end cover 1, the seed supply box connecting flange and the seed supply box upper cover are connected and fixed on the upper end cover through bolts or screws, which facilitates installation and disassembly and is conducive to replacement of the rotary distributing member 12 and the seed supply box upper cover 11; the seed supply box upper cover 11 is removed to open the seed supply box cylinder, so as to take and place the rotary distributing member 12, and due to the existence of the seed supply box connecting flange 1002, even if the screws are removed, the seed supply box 10 will not fall downward. Moreover, such structure also reduces the overall axial arrangement height and avoids using a spiral type seed feeding strip, thereby reducing the probability of seed abrasion and damage.

[0057] Further, as shown in FIG. 10, the rotary distributing member 12 comprises a rotary cylinder 1201, the outer periphery of the rotary cylinder 1201 is provided with a plurality of blades 1202 (or fan blades), and the rotary cylinder 1201 is provided with the arch breaking cone 1203 above. The blade 1202 is a rectangular fan blade, and the rectangular fan blade can divide the inner cavity of the seed supply box cylinder into a plurality of grid cavities.

[0058] The rotary cylinder 1201 is a hollow cylinder, the bottom of which is tightly attached to the upper bottom surface of the seed supply box body; in order to ensure that the blade will not be blocked during rotation, the gap between the side edge of the rectangular blade 1202 and the inner wall of the seed supply box 10 should be less than the diameter of a rapeseed (the three-axis size of rapeseed among rice, wheat and rapeseed is the smallest), so that the rotary cylinder 1201 can rotate without resistance in the cavity of the seed supply box.

[0059] Further, the base 3 is connected with the upper end cover 1 through a plurality of lugs 4 arranged on the outer periphery, and the lower portion of the base 3 is further provided with a bracket 5.

[0060] The upper end cover 1 and the base 3 are bolted through the lugs 4 after being closed, and the upper end cover 1 and the base 3 form the containing cavity after being closed, the base 3 is fixed on the bracket 5 through bolt connection, which is convenient for connection with a seed box rack during work. The upper end cover 1 is provided with a through hole in the middle portion, the seed supply box 10 passes through the through hole, and the diameter of the through hole is basically the same as the diameter of the outer wall of the seed supply box 10.

[0061] Further, the middle portion of the base 3 is provided with a base boss 301, and the inner periphery of the lower edge of the upper end cover 1 is provided with a plurality of small bosses 101.

[0062] Specifically, 8 small bosses 101 are evenly distributed along the circumferential direction below the inner wall of the upper end cover 1, the height of the small bosses 101 is 20mm, and the thickness is 10mm. The small bosses 101 can effectively reduce the splashing phenomenon of the seeds in the cavity formed by the upper end cover and the base, and reduce the damage rate of the seeds. The base 3 is provided with an inner recess, and a base boss 301 is arranged in the middle. The base boss 301 and the small boss can be used to fix the bearing.

[0063] The disc body 202 is hollow inside, and a sleeve 204 is arranged in the cavity. The sleeve 204 corresponds to the base boss 301 and is provided with a bearing. The sleeve 204 is provided with a through hole and a key groove 205, the driving spindle 9 passes through the through hole and is connected with the sleeve 204 through a flat key. When the driving spindle 9 rotates, it can drive the disc body 202 to rotate.

[0064] Further, the driving spindle 9 passes through the base 3 and connects and drives the rotary discharging disc assembly 2. The upper end of the driving spindle 9 passes through the seed supply box 10 and connects and drives the rotary material distributing part 12, and drives the arch breaking cone 1203 to rotate. The driving spindle 9 is connected with a stepping drive motor 7.

[0065] One driving spindle 9 can simultaneously connect the rotary discharging disc assembly 2, the rotary material distributing part 12 and the arch breaking cone, and simultaneously drive them to rotate. For the same crop, the type of the rotary material distributing part is determined, and the seed taking amount and the seed supply amount of the rotary material distributing part per unit time are controlled by changing the rotating speed of the driving spindle, so that the seeding amount can be accurately adjusted.

[0066] Further, a control system is further included, such as Figure 11 As shown, the control system includes a power module, a controller and a seed metering device driving module. The controller is electrically connected with the power module, the seed metering device driving module and a control panel. The seed metering device driving module includes a stepping motor driver and a stepping drive motor. After the working parameters of the seed metering device are set on the control panel, the controller converts the parameter information into pulse signals and transmits the pulse signals to the stepping motor driver.

[0067] The stepping drive motor is a 57 closed-loop stepping motor, and the maximum torque that can be transmitted is 1.2N. It is the power source of the rice and wheat oil compatible high-speed rotary disc precision seed metering device.

[0068] The control system takes the RCMF-1 speed regulating pulse controller as the core, the control panel of the RCMF-1 speed regulating pulse controller is provided with start-stop, direction and speed regulating buttons, the step drive motor can be controlled to realize stepless speed regulation, and the step drive motor can be regulated in the 0-2000 rpm speed range. Since the octagonal involute guide vanes on the disc body are arranged clockwise, experiments show that the octagonal involute guide vanes have better constraint effect on the seeds when the disc body rotates clockwise, and the consistency of the row discharge capacity of the seed metering device is better, so the rotating direction of the step drive motor is set to clockwise rotation. After the operator sets the direction and speed parameters of the seed metering device on the control panel, the RCMF-1 speed regulating pulse controller converts the above information into a pulse signal and transmits it to the step motor driver.

[0069] Further, the step motor driver is selected as the HBS57 closed loop step drive, which can drive the step motor to rotate, can accept the feedback signal of the step motor, can accurately position, and can ensure that the step motor does not lose step. After receiving the pulse signal sent by the RCMF-1 speed regulating pulse controller, the HBS57 closed loop step drive accurately drives the step motor to rotate or stop as set. The power module and the HBS57 closed loop step drive can be placed in the electric control box.

[0070] The transmission shaft of the step drive motor transmits power to the drive main shaft through a shaft coupling, the drive main shaft drives the rotating discharge disc assembly and the rotating distribution member to rotate, the seeds in the seed tank enter the internal cavity of the seed supply box under the disturbance of the arch breaking cone, are quantitatively discharged from the seed outlet under the pushing of the rectangular fan, fall on the disc body, and are uniformly distributed under the constraint of the involute guide vanes and the combined action of gravity and centrifugal force, and finally reach the seedbed through the seed conveying pipeline.

[0071] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A rice and wheat dual-purpose high-speed rotary disc precision seed metering device, comprising a base, wherein an upper end cover with a containing cavity is arranged on the base, characterized in that, The base is provided with a rotating discharge disc assembly in the range of the containing cavity, and a plurality of seed outlet channels are provided on the peripheral edge of the rotating discharge disc assembly and are arranged downwardly through the base; the upper end cover is further embedded with a seed supply box, the seed supply box is provided with a seed supply box upper cover, the seed supply box is provided with a rotating distributing part, the rotating distributing part is provided with an arch breaking cone, the tip of the arch breaking cone penetrates the seed supply box upper cover upwardly; the seed supply box upper cover is provided with a plurality of seed inlet openings, the bottom of the seed supply box is provided with a plurality of seed outlet openings, the seed outlet openings are arranged correspondingly to the rotating discharge disc assembly; the seed supply box comprises a seed supply box cylinder, the bottom of the seed supply box cylinder is provided with a seed supply box bottom plate, and the upper portion is provided with a seed supply box connecting flange; the seed supply box cylinder is arranged in the upper end cover, the seed supply box connecting flange is arranged above the upper end cover and is fixedly connected to the upper end cover together with the seed supply box upper cover, the seed supply box bottom plate is provided with a plurality of seed outlet openings, and the rotating distributing part is arranged in the seed supply box cylinder; the rotating distributing part comprises a rotating cylinder, a plurality of rectangular blades are arranged on the outer periphery of the rotating cylinder, the blades divide the inner cavity of the seed supply box cylinder into a plurality of grid cavities, the gap between the side edges of the rectangular blades and the inner wall of the seed supply box is smaller than the diameter of a rapeseed, and the rotating cylinder is provided with the arch breaking cone above.

2. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 1, characterized in that, The rotating discharge disc assembly comprises an arch-shaped dome and a truncated cone-shaped disc body, the dome and the disc body are arranged in smooth transition, and a plurality of involute guide vanes are arranged on the disc body and are arranged obliquely from the intersection of the dome and the disc body to the lower edge of the disc body.

3. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 2, characterized in that, The plurality of involute guide vanes are uniformly arranged in 6-10, the corresponding seed outlet channels are also arranged in 6-10, the distance between the lower edges of adjacent involute guide vanes is not less than the opening length of the seed outlet channels, the height of the involute guide vanes is 5-12 mm, and the inclination angle of the conical surface of the disc body is 22°-30°.

4. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 1, characterized in that, The seed outlet channel comprises a seed outlet cavity arranged in the base and a seed outlet guide cavity arranged below the base, the seed outlet cavity and the seed outlet guide cavity are arranged in communication, and the inner wall of the seed outlet cavity is arranged obliquely.

5. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 1, characterized in that, The base and the upper end cover are connected through a plurality of lugs arranged on the outer periphery, and the lower portion of the base is further provided with a support.

6. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 1, characterized in that, A driving main shaft is further arranged, the driving main shaft penetrates the base and drives the rotating discharge disc assembly, the upper end portion of the driving main shaft penetrates the seed supply box and drives the arch breaking cone, and a stepping driving motor is connected to the driving main shaft.

7. The rice and wheat dual-purpose high-speed rotary disc precision seed metering device according to claim 1, characterized in that, Also include a control system, the control system contains power module, controller and seed metering drive module, the controller is electrically connected with the power module and the seed metering drive module and control panel, the seed metering drive module includes stepper motor driver and step drive motor, after setting the working parameters of seed metering on the control panel, the controller converts parameter information into pulse signal and transmits to the stepper motor driver.

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