Automatic seed changing mechanism suitable for plot seeding

Abstract

The utility model relates to agricultural machinery, in particular to an automatic seed changing mechanism suitable for plot seeding. Comprising a seed changing chassis cover and a seed changing chassis, the seed changing chassis cover and the seed changing chassis form a cavity, and a seed changing part and an elastic part are arranged in the cavity; the seed changing part comprises a cam and a plurality of push rods located on the annular outer side of the cam, and the push rods make contact with the outer contour curve of the cam all the time under the action of the elastic part; a plurality of seed falling openings are formed along the annular edge of the seed changing chassis at intervals, the push rod is connected with the bottom opening of the seed box, and under the pushing of the cam, when the push rod moves to the bottom opening of the seed box and moves to the position above the seed falling openings, seeds in the seed box fall off from the seed falling openings, and the automatic seed changing action between the seeds in the plots can be achieved; and seed leakage and seed mixing are avoided in the seed changing and seed throwing processes.

Description

Technical Field

[0001] The utility model relates to agricultural machinery, in particular to an automatic seed-changing mechanism suitable for small-area sowing. Background Art

[0002] As a large agricultural country, China's main foods are crops such as rice and corn. With the development of agriculture, the demand for small-area seeders for variety improvement tests of rice, corn and other varieties by seed improvement companies and research institutions is becoming more and more urgent. Usually, the breeding process requires sowing different varieties of seeds in different small areas, and then screening according to the products grown from the seeds.

[0003] According to the requirements of small-area breeding, the seed types in each small area are inconsistent. Therefore, after sowing one small area, the seeds need to be changed. However, the current small-area seeders need to manually put the test seeds into the seed filling cavity one by one in the order of small areas according to the order of small areas, which leads to manual seed changing after each small area is sown, undoubtedly increasing the manual labor intensity. The current small-area seeders have made achievements in both sowing and seed cleaning, but there are few studies on the seed throwing part. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned defects existing in the prior art, and propose an automatic seed-changing mechanism suitable for small-area sowing, which can realize the automatic seed-changing action between small-area seeds, and there is no seed leakage or seed mixing during the seed-changing and seed-throwing processes.

[0005] The technical solution of the utility model is: an automatic seed-changing mechanism suitable for small-area sowing, including a seed-changing chassis cover and a seed-changing chassis. The seed-changing chassis cover and the seed-changing chassis form a chamber. Among them, a seed-changing part and an elastic part are arranged in the chamber;

[0006] The seed-changing part includes a cam and several push rods located on the annular outer side of the cam. Under the action of the elastic part, the push rods are always in contact with the outer contour curve of the cam;

[0007] Several seed dropping ports are arranged at intervals along the annular edge of the seed-changing chassis. The push rods are connected to the bottom opening of the seed box. Under the push of the cam, when the bottom opening of the seed box moves above the seed dropping port, the seeds in the seed box fall from the seed dropping port.

[0008] In the utility model, the seed-changing chassis cover is located above the seed-changing chassis, and the seed-changing chassis cover and the seed-changing chassis are fixedly connected by bolts;

[0009] Several bolts are arranged at intervals along the annular edges of the seed-changing chassis cover and the seed-changing chassis;

[0010] Both the seed-changing chassis cover and the seed-changing chassis are circular, and a circular chamber is formed between the seed-changing chassis cover and the seed-changing chassis.

[0011] The cam is located at the center of the chamber, and a seed-changing shaft is fixed to the center of the cam.

[0012] Several radially arranged push rods are spaced in the annular chamber outside the cam, and the push rods reciprocate in the radial direction of the chamber.

[0013] One end of the push rod facing the cam is connected with a rotating roller, and the push rod is always in contact with the outer contour curve of the cam through the rotating roller.

[0014] The end of the push rod facing away from the cam is slidably connected with a push rod guide block.

[0015] A seed box through hole is provided on the push rod, a seed box is fixed at the seed box through hole, the bottom opening of the seed box is connected with the seed box through hole, and the seed box through hole is communicated with the seed box.

[0016] A seed box cover is connected to the top opening of the seed box. The seed box cover is located above the seed-changing chassis cover, and the seed box passes through the seed-changing chassis cover.

[0017] A long strip hole is provided on the seed-changing chassis cover, and the seed box is slidably arranged in the long strip hole.

[0018] Chute grooves are respectively provided on the two inner side surfaces of the push rod guide block along the radial direction, and the two side edges of the push rod are respectively slidably arranged in the chute grooves.

[0019] The top surface of the end of the push rod guide block facing the cam is flat, which plays a role in blocking the bottom opening of the seed box.

[0020] A through hole is provided at the end of the push rod guide block facing away from the cam, and the through hole is communicated with the seed dropping port on the seed-changing chassis. The size of the through hole is larger than the size of the bottom opening of the seed box.

[0021] An annular side plate is fixed at the annular side edge of the seed-changing chassis, and a push rod expansion port is provided at the annular side plate corresponding to the position of the push rod.

[0022] The push rod expansion port is an arc-shaped hole. The length of the push rod expansion port is greater than the width of the push rod, and the depth of the push rod expansion port is greater than the thickness of the push rod.

[0023] The elastic part includes:

[0024] A fixed connecting piece, which is fixed on the bottom surface of the seed-changing chassis cover and close to the cam, and the fixed connecting piece and the push rod are arranged in correspondence.

[0025] An elastic band, and the fixed connecting piece, and the seed box fixed on the push rod corresponding to the fixed connecting piece are connected by an elastic member.

[0026] A one-to-one correspondence relationship is set among the seed dropping port, the push rod, the push rod guide block, and the elastic band on the seed-changing chassis.

[0027] The beneficial effects of the present utility model are as follows:

[0028] (1) Through the seed-changing part and the elastic part described in this application, during the rotation of the cam, the cam sequentially pushes each push rod to move, respectively completing the seed sowing of the small-area seeds in the seed box connected to each push rod, and the seed changing is completed by relying on the rotation of the cam, realizing the automatic seed-changing action of the small-area seeds;

[0029] (2) During the movement of the push rod, through the cooperation between the push rod and the push rod guide block, it is impossible for the push rod to leak seeds during the forward and return strokes;

[0030] (3) During the sowing of the small-area seeds, when the cam stops rotating, after the small-area seeds in the seed box complete the sowing and seed cleaning processes, the cam will start again, effectively preventing the mixing of small-area seeds. Description of the Drawings

[0031] Figure 1 is the front view structural schematic diagram of the present utility model;

[0032] Figure 2 is the top view structural schematic diagram of the present utility model;

[0033] Figure 3 is the structural schematic diagram at the seed-changing chassis;

[0034] Figure 4 is the structural schematic diagram of the bottom surface of the seed-changing chassis;

[0035] Figure 5 is the structural schematic diagram of the push rod and the push rod guide block;

[0036] Figure 6 is the structural schematic diagram of the push rod guide block;

[0037] Figure 7 is the structural schematic diagram of the bottom surface of the seed-changing chassis cover.

[0038] In the figure: 1 seed-changing chassis cover; 2 seed-changing chassis; 3 funnel-shaped seed guide tube; 4 bolt; 5 seed box; 6 seed box cover; 7 seed-changing shaft; 8 bearing; 9 cam; 10 seed dropping port; 11 push rod guide block; 12 push rod; 13 rotating roller; 14 fixed disc; 15 push rod telescopic port; 16 seed box through hole; 17 chute; 18 through hole; 19 long strip hole; 20 fixed connecting piece; 21 elastic band. Detailed Embodiments

[0039] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be made in conjunction with the accompanying drawings.

[0040] Specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0041] As Figure 1 and Figure 2 shown, the automatic seed-changing mechanism applicable to community seeding according to the present utility model includes a seed-changing chassis 2, a seed-changing chassis cover 1, and a funnel-shaped seed guide tube 5. A seed-changing chassis cover 1 is provided above the seed-changing chassis 2, and the seed-changing chassis cover 1 is fixedly connected to the seed-changing chassis 2 by bolts 4. In this embodiment, both the seed-changing chassis 2 and the seed-changing chassis cover 1 are circular, and several bolts 4 are provided at intervals along the annular outer sides of the seed-changing chassis and the seed-changing chassis cover. The seed-changing chassis cover 1 and the seed-changing chassis 2 form a cylindrical chamber, and a seed-changing part and an elastic part are provided in this chamber. The seed box 5 is connected to the seed-changing part, and during the operation of the seed-changing part, the seeding work for each community is realized.

[0042] A funnel-shaped seed guide tube 3 is fixedly provided below the seed-changing chassis 2, and the seed-changing chassis 2 is communicated with the funnel-shaped seed guide tube 5 so that the seeds in the seed box 5 can fall into the funnel-shaped seed guide tube 3. In this embodiment, an integral structure is formed between the seed-changing chassis 2 and the funnel-shaped seed guide tube 3. As Figure 4 shown, several seed dropping ports 10 are provided on the seed-changing chassis 2, and the seeds in the seed box fall into the funnel-shaped seed guide tube 3 through the seed dropping ports 10. In this embodiment, eight seed dropping ports 10 are provided at intervals along the annular edge of the seed-changing chassis 2.

[0043] As Figure 3 shown, the seed-changing part includes a cam 9 and several push rods 12 that are in contact with the outer contour curve of the cam 9. The cam 9 is located at the center position of the circular chamber formed by the seed-changing chassis 2 and the seed-changing chassis cover 1, and the center of the cam 9 is fixedly connected to a seed-changing shaft 7. During the rotation of the seed-changing shaft 7, the belt-driven cam 9 rotates simultaneously with it, and the seed-changing shaft 7 can be driven to rotate by a motor. In this embodiment, the top of the seed-changing shaft 7 is located above the seed-changing chassis cover 1, so the seed-changing shaft 7 passes through the seed-changing chassis cover 1, and the seed-changing shaft 7 is connected to the seed-changing chassis cover 1 through a bearing 8. During the rotation of the cam 9, through the contact between the outer contour curve and the push rod 12, the push rod 12 is driven to perform a radial movement. At the same time, through the elastic part, the push rod 12 can always be in contact with the outer contour curve of the cam.

[0044] Several push rods 12 are arranged in the circular chamber formed by the seed changing chassis 2 and the seed changing chassis cover 1 and in the annular chamber outside the cam 9. The push rods 12 are arranged along the radial direction of the circular chamber and can reciprocate along the radial direction of the circular chamber. A rotating roller 13 is provided at the end of the push rod 12 facing the cam 9, and the push rod 12 contacts the contour curve of the cam 9 through the rotating roller 13. The end of the push rod 12 away from the cam 9 is slidably connected to the push rod guide block 11. The push rod guide block 11 can not only guide the reciprocating motion of the push rod 12, but also cooperate with the seed box to block and drop the seeds.

[0045] like Figure 5 As shown, in this embodiment, an upper support plate and a lower support plate are fixed to the end of the push rod 12 facing the cam 9, a rotating shaft is connected between the upper support plate and the lower support plate, and a rotating roller 13 is fixed to the annular outer side of the rotating shaft. During the contact between the push rod 12 and the cam 9, the rotation of the rotating roller 13 can reduce the friction between the push rod 12 and the cam 9, thereby protecting both the push rod 12 and the cam 9.

[0046] An annular side edge is fixed at the annular edge of the chassis 2, and push rod telescopic openings 15 are respectively provided at the annular side edge of the chassis 2 and at the positions corresponding to the push rods. The push rod telescopic openings 15 are arc-shaped holes. During the movement of the push rod 12, the end thereof away from the cam is likely to extend out of the chassis 2. The push rod telescopic openings 15 can ensure that the push rod 12 can reciprocate smoothly, preventing the chassis 2 from hindering the reciprocating movement of the push rod 12.

[0047] The length of the push rod telescopic opening 15 is greater than the width of the push rod 12 , and the depth of the push rod telescopic opening 15 is greater than the thickness of the push rod 12 , so that the push rod 12 can enter the push rod telescopic opening 15 and can reciprocate in the push rod telescopic opening 15 .

[0048] The push rod 12 is provided with a seed box through hole 16, and the bottom opening of the seed box 5 is fixed at the seed box through hole 16, so the seed box through hole 16 is connected to the inside of the seed box 5. The top of the seed box 5 is hinged with a seed box cover 6. After opening the seed box cover 6, seeds of different plots can be placed in various boxes 5 respectively.

[0049] like Figure 1 As shown, the bottom of the seed box 5 is fixedly connected to the push rod 12, and the seed box cover 6 on the top of the seed box is located above the seed changing chassis cover 1, so the seed box 5 passes through the seed changing chassis cover 1. And during the reciprocating motion of the push rod 12, the seed box 5 is driven to make radial reciprocating motion at the same time, so the seed changing chassis cover 1 is provided with a plurality of long strip holes 19, and the seed boxes 5 are respectively arranged in the long strip holes 19, and the seed boxes 5 can slide in the long strip holes 19, as shown in FIG. Figure 2As shown, the long strip-shaped holes 19 play a guiding role in the reciprocating movement of the seed box 5. In this embodiment, several long strip-shaped holes 19 are provided at intervals along the circumferential direction of the seed-changing chassis cover 1.

[0050] The push rod guide blocks 11 and the push rods 12 are arranged in one-to-one correspondence. The push rod guide blocks 11 are fixed on the seed-changing chassis 2, so several push rod guide blocks 11 are provided at intervals along the circumferential direction of the seed-changing chassis 2. As Figure 6 shown, sliding grooves are respectively provided at the two inner sides of the push rod guide block 11 along the radial direction of the seed-changing chassis, and the two sides of the push rod 12 are respectively slidably arranged in the sliding grooves, so the push rod guide block 11 plays a guiding role in the radial reciprocating movement of the push rod 12.

[0051] The push rod guide block 11 is in the shape of a tetrahedron, the top surface of the push rod guide block 11 facing the cam is flat, and the top surface of the push rod guide block 11 plays a blocking role on the seeds in the seed box 5. When the push rod 12 moves to a position where the opening at the bottom of the seed box is above the top surface of the push rod guide block, at this time the top surface of the push rod guide block plays a blocking role on the seed box 5, and the small-area seeds in the seed box 5 cannot fall.

[0052] A through hole 18 is provided at one end of the push rod guide block 11 at the bottom of the seed box 5 away from the cam, and the through hole 18 is communicated with the seed dropping port 10 on the seed-changing chassis 2, and the size of the through hole 18 is larger than the size of the opening at the bottom of the seed box. Therefore, in this application, the push rods 12, the push rod guide blocks 11 and the seed dropping ports on the seed-changing chassis are respectively arranged in one-to-one correspondence.

[0053] When the push rod 12 moves to a position where the opening at the bottom of the seed box is above the through hole 18, at this time the small-area seeds in the seed box 5, under the action of their own gravity, sequentially fall into the funnel-shaped seed guiding tube 3 along the through hole 18 on the push rod guide block 11 and the seed dropping port 10 on the seed-changing chassis 2, and under the seed guiding action of the funnel-shaped seed guiding tube 3, the small-area seeds finally fall into the soil.

[0054] As Figure 7 shown, the elastic part includes an elastic band 21 and a fixed connecting piece 20, and several fixed connecting pieces 20 are provided on the bottom surface of the seed-changing chassis cover 1. The fixed connecting pieces 20 are arranged at intervals along the circumferential direction of the seed-changing chassis cover 1 and are located at positions close to the cam. The fixed connecting pieces 20 and the push rods 12 are arranged in one-to-one correspondence.

[0055] In this embodiment, the fixed connecting piece 20 is a protrusion fixed on the bottom surface of the seed-changing chassis cover 1, which includes a vertical rod, the top of the vertical rod is fixedly connected to the bottom surface of the seed-changing chassis cover 1, and the bottom of the vertical rod is fixedly connected to a limit disc. An elastic band 21 is connected between the vertical rod and the seed box 5.

[0056] Since the seed box 5 is fixedly connected to the push rod 12, during the radial movement of the push rod 12, when the rotating roller 13 at the end of the push rod 12 contacts the base circle of the cam 9, the elastic belt 21 is in its original state at this time, and the elastic force in the elastic belt 21 is zero. When the cam 9 pushes the push rod 12 to move radially outward, the elastic belt 21 is stretched. After the thrust acting on the push rod 12 is removed, under the action of the tensile force in the elastic belt 21, the push rod 12 and the seed box 5 automatically return to their original positions.

[0057] The working process of this automatic seed-changing mechanism is as described below. Before the mechanism operates, the protrusion of the cam pushes one of the push rods 12 to the maximum stroke position and remains stationary, and then seeds for different plots are put into each seed box 5. At this time, the bottom opening of the seed box on the push rod 12 at the maximum stroke position is communicated with the seed dropping port 10, and the plot seeds in this seed box 5 directly fall into the funnel-shaped seed guiding tube 3, and then enter the seed metering device for sowing.

[0058] When the process of sowing and seed cleaning of the plot seeds in this seed box is completed, the motor starts and drives the cam to rotate. Since there are eight push rods 12 in this embodiment, when the cam rotates 45°, the cam will push the next second push rod to move away from the center until the second push rod moves to the maximum stroke position, and then the cam 9 stops rotating. At this time, the seeds in the seed box 5 connected to the second push rod fall into the funnel-shaped seed guiding tube 3 under the action of their own gravity, completing the seed dropping action of the plot seeds in this seed box 5. After all the seeds in this seed box 5 have fallen, the cam 9 starts again, effectively ensuring that there is no mixing of seeds between different plots.

[0059] Next, as the cam 9 rotates, the cam 9 will successively contact other push rods and push the push rod 12 to move to the maximum stroke position, and the seeds in the seed box 5 connected to the push rod will correspondingly fall, thus successively realizing the seed dropping of the plot seeds in each seed box 5.

[0060] During the rotation of the cam, the cam will gradually push the next push rod to move, while the previous push rod that contacted the cam before will automatically return to its original position under the action of the elastic force of the elastic belt 21, so that the rotating roller 13 at the end of the push rod 12 can always contact the base circle of the cam 9.

[0061] The above has introduced in detail the automatic seed-changing mechanism provided by the present utility model for community seeding. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic seed-changing mechanism applicable to plot seeding, comprising a seed-changing chassis cover and a seed-changing chassis. The seed-changing chassis cover and the seed-changing chassis form a chamber, characterized in that, The chamber is provided with a seed-changing part and an elastic part; The seed-changing part includes a cam and several push rods located on the annular outer side of the cam. Under the action of the elastic part, the push rods are always in contact with the outer contour curve of the cam; Several seed-dropping ports are arranged at intervals along the annular edge of the seed-changing chassis. The push rods are connected to the bottom opening of the seed box. Under the push of the cam, when the push rod moves to the position where the bottom opening of the seed box moves above the seed-dropping port, the seeds in the seed box fall from the seed-dropping port.

2. The automatic seed-changing mechanism applicable to plot seeding according to claim 1, characterized in that, The seed-changing chassis cover is located above the seed-changing chassis, and the seed-changing chassis cover and the seed-changing chassis are fixedly connected by bolts; Several bolts are arranged at intervals along the annular edges of the seed-changing chassis cover and the seed-changing chassis; Both the seed-changing chassis cover and the seed-changing chassis are circular, and a circular chamber is formed between the seed-changing chassis cover and the seed-changing chassis.

3. The automatic seed-changing mechanism applicable to community seeding according to claim 1, characterized in that, The cam is located at the center of the chamber, and a seed-changing shaft is fixed to the center of the cam; Several radially arranged push rods are arranged at intervals in the annular chamber outside the cam, and the push rods reciprocate along the radial direction of the chamber.

4. The automatic seed-changing mechanism applicable to community seeding according to claim 1, characterized in that, One end of the push rod facing the cam is connected with a rotating roller, and the push rod is always in contact with the outer contour curve of the cam through the rotating roller; The end of the push rod facing away from the cam is slidably connected with a push rod guide block; A seed box through hole is provided on the push rod, a seed box is fixed at the seed box through hole, the bottom opening of the seed box is connected with the seed box through hole, and the seed box through hole is communicated with the seed box.

5. The automatic seed-changing mechanism applicable to plot seeding according to claim 1, characterized in that, A seed box cover is connected to the top opening of the seed box. The seed box cover is located above the seed-changing chassis cover, and the seed box passes through the seed-changing chassis cover; A long strip hole is provided on the seed-changing chassis cover, and the seed box is slidably arranged in the long strip hole.

6. The automatic seed-changing mechanism applicable to plot seeding according to claim 4, wherein, Chute grooves are respectively provided on the two inner side surfaces of the push rod guide block along the radial direction, and the two side edges of the push rod are respectively slidably arranged in the chute grooves; The top surface of the end of the push rod guide block facing the cam is flat, which plays a role in blocking the bottom opening of the seed box; A through hole is provided at the end of the push rod guide block facing away from the cam, and the through hole is communicated with the seed-dropping port on the seed-changing chassis. The size of the through hole is larger than the size of the bottom opening of the seed box.

7. The automatic seed-changing mechanism applicable to plot seeding according to claim 1, characterized in that, An annular side plate is fixed at the annular side of the seed-changing chassis, and a push rod expansion port is provided at the position corresponding to the push rod on the annular side plate; The push rod expansion port is an arc-shaped hole. The length of the push rod expansion port is greater than the width of the push rod, and the depth of the push rod expansion port is greater than the thickness of the push rod.

8. The automatic seed-changing mechanism applicable to plot seeding according to claim 4, characterized in that The elastic part includes: A fixed connecting piece, which is fixed on the bottom surface of the seed-changing chassis cover and close to the cam, and the fixed connecting piece and the push rod are arranged in correspondence; An elastic band, and the fixed connecting piece and the seed box fixed on the push rod corresponding to the fixed connecting piece are connected by an elastic member.

9. The automatic seed-changing mechanism applicable to plot seeding according to claim 4, characterized in that, A one-to-one correspondence relationship is set among the seed-dropping port on the seed-changing chassis, the push rod, the push rod guide block, and the elastic band.

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