A wheat seed metering device with a friction wheel electric drive

Abstract

The application discloses a wheat seed sowing device driven by a friction wheel, and relates to the field of seed sowing devices.The wheat seed sowing device driven by a friction wheel comprises a seed box, a friction wheel, a V-shaped hole wheel, a seed furrow box body and a shifting piece fixing frame, the friction wheel and the V-shaped hole wheel are rotationally connected in the seed box, the seed furrow box body and the shifting piece fixing frame connected in the seed box are respectively located on the left side and the right side of the friction wheel and the V-shaped hole wheel, the bottom of the friction wheel is embedded in the seed furrow box body and the V-shaped hole wheel and is gap matched, and the shifting pieces arranged on the side of the shifting piece fixing frame are respectively gap matched with the V-shaped hole wheel and the friction wheel.Under the action of the seed furrow and the friction wheel, the long axis of the seed is arranged along the seed furrow direction, the seed posture is further adjusted by the V-shaped hole wheel, the friction disc and the shifting piece in the seed filling area, the ability of the seed to enter the V-shaped hole is improved, the seed filling efficiency is improved, the friction wheel and the V-shaped hole wheel are respectively connected with a stepping motor, the rotation speed of the V-shaped hole wheel and the friction wheel is controlled by the stepping motor, and the purpose of controlling the seed sowing amount is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seed metering device, especially to a wheat seed metering device with friction wheel electric drive. BACKGROUND

[0002] At present, most of the areas use the traditional fluted roller seeder to carry out the wheat seeding operation, although this model is simple in structure and reliable in function, but is restricted by the mechanical structure, and the seeding uniformity is difficult to meet the requirements. The wheat precision seed metering device is still in the research stage, mainly using air suction type or mechanical type seed metering device. The mechanical type seed metering device mainly uses the hole wheel type seed metering wheel. The traditional hole type seed metering device has the advantages of simple processing, low cost, good uniformity and easy to guarantee the plant spacing of crops, and the disadvantage is that the filling efficiency is low, the seeding amount is not accurate, and it is easy to be affected by the factors such as the rotation speed of the seed metering wheel, the cleanliness of the seed, the size of the seed and the flowability of the seed.

[0003] Therefore, the technical personnel in the art urgently need to provide a wheat seed metering device with friction wheel electric drive, which improves the filling rate of the hole wheel and accurately controls the seeding amount of the seed. SUMMARY

[0004] The purpose of the present application is to provide a wheat seed metering device with friction wheel electric drive, which improves the filling rate of the hole wheel and accurately controls the seeding amount of the seed.

[0005] In order to solve the above technical problems, the present application adopts the following technical scheme:

[0006] The present application provides a wheat seed metering device with friction wheel electric drive, which improves the filling rate of the hole wheel and accurately controls the seeding amount of the seed.

[0007] Preferably, the top of the seed furrow box is provided with a seed furrow, and the seed furrow is located on both sides of the friction wheel.

[0008] Preferably, the seed furrow is inclined downward, and the end of the seed furrow is in contact with the hole of the V-shaped hole wheel.

[0009] Preferably, the top of the inner wall of the seed box is inclinedly provided with a seed conveying plate, and the seed falls into the seed furrow through the seed conveying plate.

[0010] Preferably, the bottom end of the seed conveying plate is vertically connected with a seed blocking plate, and the friction wheel penetrates through the seed blocking plate and is in gap cooperation with the seed blocking plate.

[0011] Preferably, the rotation directions of the friction wheel and the V-shaped hole wheel are opposite, and the friction wheel rotates in a downward direction inclined to the seed furrow.

[0012] Preferably, the V-shaped hole wheel comprises a left V-shaped hole wheel and a right V-shaped hole wheel, the left V-shaped hole wheel and the right V-shaped hole wheel are fixed on a transmission shaft through key connection, the bottom of the friction wheel is embedded between the left V-shaped hole wheel and the right V-shaped hole wheel, and the V-shaped hole wheel is matched with the shape of the seed.

[0013] Preferably, the number of the pushers is two, the two pushers are arranged on the top of the side of the pusher fixing frame, the two pushers are respectively located on the left and right sides of the friction wheel and are in gap cooperation with the friction wheel, and the bottom ends of the two pushers are respectively in gap cooperation with the V-shaped holes of the left V-shaped hole wheel and the right V-shaped hole wheel.

[0014] Preferably, the seed box is divided into a seed dropping area, a seed posture adjusting area, a seed filling area, a seed carrying area, a seed throwing area and a returning area, and the seed enters the seed dropping area, the seed posture adjusting area, the seed filling area and the seed carrying area in sequence and is finally output from the seed throwing area.

[0015] Preferably, the friction wheel and the V-shaped hole wheel are respectively connected with a stepping motor, and the rotation speeds of the friction wheel and the V-shaped hole wheel are controlled by the stepping motor.

[0016] Compared with the prior art, the present application has the following beneficial technical effects:

[0017] (1) The present application is a wheat seed metering device with a friction wheel and an electric drive, under the action of the seed furrow and the friction wheel, the long axis of the seed is arranged along the direction of the seed furrow, so that the seed is better filled into the V-shaped hole of the V-shaped hole wheel; in the seed filling area, the V-shaped hole wheel, the friction disc and the pusher interact to further adjust the posture of the wheat seed, improve the ability of the seed to enter the V-shaped hole, and improve the seed filling efficiency;

[0018] (2) The present application uses a stepping motor to control the rotation speeds of the V-shaped hole wheel and the friction wheel, so as to control the seed metering amount. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the description of the drawings.

[0020] Figure 1 It is a structural schematic diagram of the present application, a wheat seed metering device with a friction wheel and an electric drive;

[0021] Figure 2 It is a structural schematic diagram of the present application, a V-shaped hole wheel;

[0022] Figure 3 It is a schematic view of a seed ditch body structure of the present application;

[0023] Figure 4 It is a force analysis diagram of the seed of the present application;

[0024] Figure 5 It is a schematic view of the operation process of the present application;

[0025] Figure 6 It is a schematic view of the simulation effect of the present application;

[0026] Figure 7 It is a schematic view of the friction wheel and the type hole wheel speed control device of the present application.

[0027] Marked for explanation: 1, a box; 2, a friction wheel; 3, a V-shaped hole wheel; 4, a seed ditch body; 5, a seed ditch; 6, a seed blocking plate; 7, a push piece; 8, a push piece fixing frame; 9, a seed conveying plate. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical schemes and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0029] As shown in Figures 1-7 A wheat seed metering device with a friction wheel electric drive, comprising a seed box 1, a friction wheel 2, a V-shaped hole wheel 3, a seed ditch body 4 and a push piece fixing frame 8, the friction wheel 2 and the V-shaped hole wheel 3 are respectively rotatably connected in the seed box 1, the inside of the seed box 1 is connected with the seed ditch body 4 and the push piece fixing frame 8, the seed ditch body 4 and the push piece fixing frame 8 are respectively located on the left and right sides of the friction wheel 2 and the V-shaped hole wheel 3, the bottom of the friction wheel 2 is respectively embedded in the seed ditch body 4, the V-shaped hole wheel 3 and gap fit, the side of the push piece fixing frame 8 is provided with a push piece 7, the push piece 7 is respectively gap fit with the V-shaped hole wheel 3 and the friction wheel 2, the bottom end of the push piece 7 is located directly above the V-shaped hole wheel 3 and the distance between them allows a seed to pass through.

[0030] Specifically, the seed box 1 is made of four pieces of acrylic plate, the front and rear two pieces of acrylic plate are connected with the push piece fixing frame 8 and the seed ditch body 4 through bolts, the front and rear acrylic plates of the seed box are engraved with a counterbore with a diameter of 100 mm and a depth of 4 mm, the V-shaped hole wheel 3 is placed in the middle of the two counterbores and can rotate freely through gap fit; the left and right type hole wheels of the V-shaped hole wheel are connected by keys; the seed ditch body 4 and the V-shaped hole wheel 3 have a gap of 4 mm in the middle, the bottom of the friction wheel is embedded therein; the friction wheel is connected with the seed box 1 through a bearing.

[0031] Specifically, the friction wheel 2 and the V-shaped hole wheel 3 are respectively driven to rotate by a motor; the poking piece 7 is made of nylon and has a certain elasticity, which can block most seeds in the seed filling area and can also remove as many seeds as possible from the V-shaped hole.

[0032] The top of the seed furrow box 4 is provided with a seed furrow 5, and the seed furrow 5 is located on both sides of the friction wheel 2.

[0033] The seed furrow 5 is inclined downward, and the end of the seed furrow 5 is in contact with the V-shaped hole of the V-shaped hole wheel 3.

[0034] The top of the inner wall of the seed box 1 is inclinedly provided with a seed conveying plate 9, and the seeds fall into the seed furrow 5 through the seed conveying plate 9.

[0035] The bottom end of the seed conveying plate 9 is vertically connected with a seed blocking plate 6, the friction wheel 2 penetrates through the seed blocking plate 6 and is in gap cooperation with the seed blocking plate 6. The function of the seed blocking plate 6 is to block most seeds above the seed furrow box 4, so that the V-shaped hole wheel 3 only contacts with a small part of the seeds, reduces the pressure of the seed group on the V-shaped hole wheel 3, reduces the friction force between the seed group and the V-shaped hole wheel 3, and prevents the V-shaped hole wheel 3 from rotating due to excessive friction force.

[0036] The rotation directions of the friction wheel 2 and the V-shaped hole wheel 3 are opposite, the friction wheel 2 rotates along the downward inclined direction of the seed furrow 5, through the rotation of the friction wheel 2 and the cooperation with the seed furrow, the long axis of the seed is arranged along the direction of the seed furrow, so that the seed is better filled into the V-shaped hole of the V-shaped hole wheel; in the seed filling area, the V-shaped hole wheel, the friction disc and the poking piece interact to further adjust the posture of the wheat seeds and improve the ability of the seeds to enter the V-shaped hole.

[0037] As shown in Figure 2 The V-shaped hole wheel 3 includes a left V-shaped hole wheel and a right V-shaped hole wheel, the left V-shaped hole wheel and the right V-shaped hole wheel are fixed on a transmission shaft after being connected by a key, the bottom of the friction wheel 2 is embedded between the left V-shaped hole wheel and the right V-shaped hole wheel, and the shape of the V-shaped hole of the V-shaped hole wheel 3 matches the shape of the seed.

[0038] Specifically, there are seventy-two V-shaped holes on the V-shaped hole wheel 3, and the left V-shaped hole wheel and the right V-shaped hole wheel are printed by a 3D printer.

[0039] The force analysis of the wheat seed is shown in Figure 4 As the collision frequency of the wheat seed is high during the seed sowing process and the movement process is complex, only the force analysis of a single seed is carried out this time. It can be seen from the force analysis that under the action of the friction force and the gravity, the long axis of the seed is parallel to the seed furrow, the posture of the seed can be corrected under the action of the friction wheel 2 and the seed furrow 5, so that the long axis of the seed is parallel to the seed furrow 5, and finally the seed smoothly enters the V-shaped hole.

[0040] The number of the pushers 7 is two, and the two pushers 7 are arranged on the top of the sides of the pusher fixing frame 8, and are respectively located on the left and right sides of the friction wheel 2 and gap matched with the friction wheel 2, and the bottom ends of the two pushers 7 are respectively gap matched with the holes of the left hole wheel and the right hole wheel. The pushers 7 can block most seeds in the seed filling area III, and can also remove as many seeds as possible from the holes of the V-shaped hole wheel 3.

[0041] The seed box 1 is divided into a seed falling area I, a seed posture adjusting area II, a seed filling area III, a seed carrying area IV, a seed throwing area V and a returning area VI, and the seeds enter the seed falling area I, the seed posture adjusting area II, the seed filling area III and the seed carrying area IV in sequence, and are finally output from the seed throwing area V.

[0042] The working process of the present application is as follows:

[0043] As shown in Figure 5 The V-shaped hole wheel 3 and the friction wheel 2 start to rotate when the seed metering device of the present application works. The seeds enter from above the seed metering device, and the seeds enter the seed falling area I of the seed box 1 along the seed conveying plate 9, and then enter the seed posture adjusting area II, and under the action of the contact force of the seed furrow 5 and the friction wheel 2, the long axis of the seed is arranged along the direction of the seed furrow 5, and slides downward along the seed furrow 5 and enters the hole of the V-shaped hole wheel 3; under the rotation of the friction wheel 2 and the V-shaped hole wheel 3, the seed enters the seed filling area III, and if the seed does not enter the hole, there is still a chance for the seed to enter the hole in the seed filling area, and the pushers 7 can block most seeds in the seed filling area III, and can also remove as many seeds as possible from the holes of the V-shaped hole wheel 3; after the action of the pushers 7, the seeds enter the seed carrying area IV, and in the seed carrying area IV, the wheat seeds are subjected to the supporting force of the V-shaped hole wheel 3, the gravity of the seeds and the centrifugal force brought by the rotation of the V-shaped hole wheel 3, and under the action of the three forces, the seeds rotate at a constant speed, and with the rotation of the V-shaped hole wheel 3, the supporting force becomes smaller, and the seeds begin to separate from the V-shaped hole wheel 3, leave the seed metering device and complete the sowing.

[0044] As shown in Figure 6 It can be seen from the simulation test that when the rotation speed of the V-shaped hole wheel 3 is low, the seed metering rate can reach more than 90%, and the simulation data is shown in Table 1.

[0045] Table 1

[0046]

[0047] Specifically, the wiring diagram of the friction wheel and the hole wheel speed control device is as shown in Figure 7As shown, the V-shaped hole wheel 3 and the friction wheel 2 of the seed sowing device are controlled by the stepping motor, and the rotation speed of the V-shaped hole wheel 3 and the friction wheel 2 is controlled, so as to control the seed sowing amount. Since two pulse signals are required to control the two stepping motors, two Arduino controllers are connected through a soft serial port to control the two stepping motor drives, and the rotation speed of the V-shaped hole wheel 3 and the friction wheel 2 can be input by using the serial port monitor of the Arduino IDE.

[0048] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0049] The above-described embodiments are only to describe the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modifications and improvements made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A friction wheel electrically driven wheat seed metering device, characterized in that: The utility model provides a kind of seed box, friction wheel (2), V-shaped hole wheel (3), seed furrow box body (4) and paddle fixed frame (8), the friction wheel (2) and the V-shaped hole wheel (3) are rotatably connected in the seed box (1) respectively, the inside of the seed box (1) is connected with seed furrow box body (4) and paddle fixed frame (8), the seed furrow box body (4) and the paddle fixed frame (8) are located at the left and right sides of the friction wheel (2) and the V-shaped hole wheel (3) respectively, the bottom of the friction wheel (2) is embedded in the seed furrow box body (4), the V-shaped hole wheel (3) and clearance fit, the side of the paddle fixed frame (8) is provided with paddle (7), the paddle (7) is respectively with the V-shaped hole wheel (3), the friction wheel (2) clearance fit, the bottom of the paddle (7) is located in the V-shaped hole wheel (3) directly above and the interval of two allows a seed to pass through; The top of the seed furrow box body (4) is provided with seed furrow (5), and the seed furrow (5) is located on both sides of the friction wheel (2). The seed furrow (5) is inclined downward, and the end of the seed furrow (5) is in contact with the hole of the V-shaped hole wheel (3). The top of the inner wall of the seed box (1) is inclinedly provided with a seed conveying plate (9). The seed falls into the seed furrow (5) through the seed conveying plate (9). The bottom end of the seed conveying plate (9) is vertically connected with a seed blocking plate (6). The friction wheel (2) penetrates through the seed blocking plate (6) and clearance fits with the seed blocking plate (6). The rotation directions of the friction wheel (2) and the V-shaped hole wheel (3) are opposite. The friction wheel (2) rotates in the direction of the downward inclination of the seed furrow (5). The V-shaped hole wheel (3) includes a left hole wheel and a right hole wheel. The left hole wheel and the right hole wheel are fixed on a transmission shaft after being connected by a key. The bottom of the friction wheel (2) is embedded between the left hole wheel and the right hole wheel. The shape of the hole of the V-shaped hole wheel (3) matches the shape of the seed. The number of paddles (7) is two. Both of the paddles (7) are arranged on the top of the side of the paddle fixed frame (8). Both of the paddles (7) are located on the left and right sides of the friction wheel (2) and clearance fit with the friction wheel (2). The bottom ends of both of the paddles (7) clearance fit with the holes of the left hole wheel and the right hole wheel.

2. A motorized wheat seed metering device with a friction wheel drive as claimed in claim 1, characterized in that: The seed box (1) is divided into a seed dropping area, a seed posture adjusting area, a seed filling area, a seed carrying area, a seed throwing area, and a returning area. The seed enters the seed dropping area, the seed posture adjusting area, the seed filling area, and the seed carrying area in sequence, and is finally output from the seed throwing area.

3. A motorized wheat seed metering device with a friction wheel drive as claimed in claim 1, characterized in that: The friction wheel (2) and the V-shaped hole wheel (3) are respectively connected with a stepping motor. The rotation speed of the friction wheel (2) and the V-shaped hole wheel (3) is controlled by the stepping motor.

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