Mechanical seed metering device

Abstract

This utility model relates to the field of sowing equipment technology, and provides a mechanical seed metering device, including: a first shell with an open side forming a seed metering cavity; a second shell connected to the open side of the first shell; a seed metering disc disposed in the seed metering cavity, the seed metering disc being rotatably connected to the second shell via a rotating shaft, and a seed metering structure being formed circumferentially on the side of the seed metering disc near the first shell; the seed metering structure includes: a first receiving part arranged at intervals along the circumference of the seed metering disc; a second receiving part disposed on the side of the first receiving part near the rotation axis of the seed metering disc, and arranged at intervals from the first receiving part; both the first and second receiving parts have receiving surfaces for receiving seeds. During the rotation of the seed metering disc, seeds enter the receiving surface of the first receiving part, completing seed filling; excess seeds fall into the seed metering cavity, completing seed cleaning; as the seed metering disc continues to rotate, some seeds from the first receiving part fall into the receiving surface of the second receiving part, completing seed preparation, resulting in dispersed seed distribution and a high seed filling rate.

Description

Technical Field

[0001] This utility model relates to the field of seeding equipment technology, and in particular to a mechanical seed metering device. Background Technology

[0002] There are two main types of seed metering devices: pneumatic and mechanical. Pneumatic seed metering devices use negative pressure generated by a fan to draw seeds onto the suction holes of a seed metering disc. The disc rotates under power, and when it reaches a certain position, the negative pressure disappears, allowing the seeds to fall into the discharge port and be discharged through the discharge pipe. The design of the seed metering disc in a pneumatic seed metering device determines its performance and the accuracy of seed dispensing. The disc diameter is limited, thus restricting the number of holes. Currently, traditional pneumatic seed metering devices suffer from high missed seeding rates, severe seed damage, and poor seed flowability under high-speed operation, significantly impacting their performance. Compared to pneumatic and mechanical seed metering devices, mechanical seed metering devices have been widely used in planting operations due to their simple structure and low energy consumption. However, the seed filling area of ​​existing mechanical seed metering devices experiences disorder and accumulation of seed groups, mutual compression and constrained posture. Due to the compression of seed groups, the seed filling effect decreases, and the unstable filling effect exacerbates the problem of missed filling or overfilling, which seriously restricts the rapid development of internal filling seed metering devices. Utility Model Content

[0003] This utility model provides a mechanical seed metering device to solve the technical problems of seed population compression and low seed filling rate in the existing mechanical seed metering devices.

[0004] This utility model provides a mechanical seed metering device, comprising:

[0005] The first shell has an opening on one side, forming a seed-discharging chamber;

[0006] The second housing is connected to the open side of the first housing;

[0007] A seed metering disc is disposed in the seed metering cavity. The seed metering disc is rotatably connected to the second housing via a rotating shaft, and a seed metering structure is formed on the circumferential side of the seed metering disc near the first housing.

[0008] The seeding structure includes:

[0009] The first receiving part is arranged at intervals along the circumference of the seed metering disc;

[0010] The second receiving part is disposed on the side of the first receiving part near the rotation axis of the seed metering disc, and is arranged at a distance from the first receiving part;

[0011] Both the first receiving part and the second receiving part have receiving surfaces for receiving the seed.

[0012] According to the present invention, a mechanical seed metering device is provided.

[0013] A channel for seeds to pass through is formed between adjacent first receiving parts and between adjacent second receiving parts;

[0014] During the rotation of the seed metering disc, the seeds are placed on the receiving surfaces of the first receiving part and the second receiving part through the channel.

[0015] According to the present invention, a mechanical seed metering device is provided.

[0016] The second receiving part forms an angle with the first receiving part, which is used to guide the seed and allow the seed to enter the channel;

[0017] Wherein, the included angle is less than ninety degrees.

[0018] According to the present invention, a mechanical seed metering device is provided.

[0019] The receiving surface of the first receiving part is a first concave surface extending toward the side away from the rotation direction of the seed metering disc, used to receive and distribute seeds.

[0020] According to the present invention, a mechanical seed metering device is provided.

[0021] The receiving surface of the second receiving part is a second concave surface extending toward the side away from the first receiving part, used to receive the stored seeds.

[0022] According to the mechanical seed metering device provided by this utility model, it further includes:

[0023] The seed discharge port is located on the side of the first housing;

[0024] A separator is provided in the first housing and corresponding to the seed outlet, for separating the seeds to be discharged from the reserve seeds.

[0025] According to the mechanical seed metering device provided by this utility model, the dividing part includes:

[0026] The mounting component is disposed on the side of the first housing away from the second housing;

[0027] A barrier member, one side of which is connected to the mounting member, and the other side of which extends into the seed dispensing cavity and is inserted into the gap between the first receiving part and the second receiving part.

[0028] According to the present invention, a mechanical seed metering device is provided.

[0029] The arrangement range of the barrier along the circumference of the seeding tray is adjustable.

[0030] According to the present invention, a mechanical seed metering device is provided.

[0031] The barrier is a flexible barrier.

[0032] According to the mechanical seed metering device provided by this utility model, it further includes:

[0033] A seed box is disposed on the side of the first housing away from the second housing, and the seed box is in communication with the seed discharge chamber.

[0034] The above-described one or more technical solutions of this utility model have at least the following beneficial technical effects: A seed metering structure is circumferentially arranged on the seed metering disc, with the first receiving part and the second receiving part located on the outer and inner rings of the seed metering disc, respectively; during the rotation of the seed metering disc, seeds enter the receiving surface of the first receiving part located on the outer ring, completing the seed filling; excess seeds fall into the seed metering chamber under gravity, completing the seed cleaning; as the seed metering disc continues to rotate, a portion of the seeds on the first receiving part fall into the receiving surface of the second receiving part under gravity, completing the seed preparation. The structure of this device is scientifically and rationally designed, resulting in dispersed seed distribution and a high seed filling rate during the seed metering process. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is one of the schematic diagrams of the mechanical seed metering device provided in this embodiment of the utility model;

[0037] Figure 2 This is a second schematic diagram of the mechanical seed metering device provided in this embodiment of the present invention;

[0038] Figure 3 This is the third schematic diagram of the mechanical seed metering device provided in this embodiment of the utility model.

[0039] Figure label:

[0040] 1. First shell; 11. Seed dispensing chamber; 12. Seed dispensing port; 2. Second shell; 3. Rotating shaft;

[0041] 4. Seed metering tray; 41. First receiving part; 411. First concave surface; 42. Second receiving part; 421. Second concave surface; 43. Channel;

[0042] 5. Divider; 51. Mounting component; 52. Barrier component; 6. Seed box. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] The following is combined Figures 1-3 This invention describes a mechanical seed metering device according to an embodiment of the present invention.

[0045] like Figure 1 As shown, this utility model embodiment provides a mechanical seed metering device, including: a first housing 1, a second housing 2, and a seed metering disc 4; the first housing 1 has an open side to form a seed metering cavity 11; the second housing 2 is connected to the open side of the first housing 1; the seed metering disc 4 is disposed in the seed metering cavity 11, and the seed metering disc 4 is rotatably connected to the second housing 2 via a rotating shaft 3, and a seed metering structure is formed circumferentially on the side of the seed metering disc 4 near the first housing 1; the seed metering structure includes: a first receiving part 41, which is arranged at intervals along the circumference of the seed metering disc 4; a second receiving part 42, which is disposed on the side of the first receiving part 41 near the rotation axis of the seed metering disc 4, and is arranged at intervals from the first receiving part 41; wherein, both the first receiving part 41 and the second receiving part 42 have receiving surfaces for receiving seeds.

[0046] Specifically, the seed metering disc 4 is circumferentially equipped with a seed metering structure. The first receiving part 41 and the second receiving part 42 in the seed metering structure are located on the outer and inner rings of the seed metering disc 4, respectively. During the rotation of the seed metering disc 4, the seeds enter the receiving surface of the first receiving part 41 located on the outer ring, completing the filling of seeds. Excess seeds fall into the seed metering chamber 11 under the action of gravity, completing the cleaning of seeds. The seed metering disc 4 continues to rotate, and under the action of gravity, a portion of the seeds on the first receiving part 41 fall into the receiving surface of the second receiving part 42, completing the preparation of seeds. This device is scientifically and rationally designed, with dispersed seed populations and a high filling rate.

[0047] Furthermore, since the first receiving part 41 and the second receiving part 42 can stably receive the seeds, in this embodiment, during the early stage of the rotation of the seed metering disc 4, that is, the filling and cleaning stage, there is no need to use a separating mechanism to separate the seeds to be metered and the reserve seeds and transport them synchronously. The separating plate is only needed when the seeds are metered.

[0048] In some possible implementations, the first receiving part 41 and the second receiving part 42 are welded to the seed metering tray 4 or integrally formed with the seed metering tray 4; the first receiving part 41 and the second receiving part 42 are both protruding structures that protrude from the surface of the seed metering tray 4 and are arranged at intervals; the gap between adjacent first receiving parts 41 or adjacent second receiving parts 42 is matched with the inner wall surface of the seed metering cavity 11 inside the first housing 1, thereby forming a channel that can pass through and store seeds.

[0049] like Figure 2 As shown, a mechanical seed metering device is provided according to an embodiment of this utility model.

[0050] A channel 43 for seeds to pass through is formed between adjacent first receiving parts 41 and between adjacent second receiving parts 42;

[0051] During the rotation of the seed metering disc 4, the seeds are placed on the receiving surfaces of the first receiving part 41 and the second receiving part 42 through the channel 43.

[0052] It is understandable that since the first receiving part 41 and the second receiving part 42 have receiving surfaces, that is, the channel formed by the first receiving part 41 or the second receiving part 42 and the inner wall of the seed dispensing cavity 11 can stably store a seed. Since the first receiving part 41 and the second receiving part 42 cannot receive the excess seeds, they will slide out of the channel 43 under the action of gravity and fall back into the seed dispensing cavity 11.

[0053] A mechanical seed metering device is provided according to an embodiment of this utility model.

[0054] The second receiving part 42 forms an angle with the first receiving part 41, which is used to guide the seeds and allow them to enter the channel 43.

[0055] Among them, the included angle is less than 90 degrees.

[0056] Specifically, the second receiving part 42 is arranged at an angle to the first receiving part 41, that is, the plane where the second receiving part 42 is located has an angle with the tangent at the intersection of the plane and the edge of the seed metering tray 4. This angle is called the seed disturbance angle θ, which is an acute angle. This allows the second receiving part 42 to provide guidance for the seeds when the seed metering tray 4 rotates, guiding the seeds to the channel 43 and placing them on the first concave surface 411 of the first receiving part 41. At the same time, as the seed metering tray 4 rotates, due to gravity, excess seeds in the channel 43 will fall. At this time, the inclined surface of the second receiving part 42 also provides guidance, and the excess seeds will fall back into the seed population in the seed metering cavity 11 along the inclined surface of the second receiving part 42.

[0057] In some possible implementations, the second receiving part 42 is provided with a seed-disturbing protrusion on the side away from the first receiving part 41. When the seed dispensing disc 4 rotates, it generates centrifugal force. Under the action of centrifugal force and seed-disturbing protrusion, the static population in the seed dispensing cavity 11 is driven into a discrete state.

[0058] A mechanical seed metering device is provided according to an embodiment of this utility model.

[0059] The first receiving part 41 has a first concave surface 411 extending toward the side away from the rotation direction of the seed metering disc 4, for receiving and discharging seeds.

[0060] Specifically, as the seed filling and cleaning process progresses, the seed metering disc 4 rotates, eventually leaving only one seed to be discharged in each first receiving part 41. This seed is discharged through the seed discharge port 12 as the seed metering disc 4 rotates, achieving stable single-seed discharging.

[0061] A mechanical seed metering device is provided according to an embodiment of this utility model.

[0062] The second receiving portion 42 has a second concave surface 421 extending toward the side away from the first receiving portion 41, for receiving stored seeds.

[0063] Specifically, as the seed filling and clearing process progresses, the rotation of the seed metering disc 4 will eventually leave only one reserve seed in each second receiving part 42. When the seed to be discharged is discharged, the reserve seed will fall into the empty space of the first receiving part 41 occupied by the corresponding seed to be discharged, becoming a new seed to be discharged. This process is repeated to achieve the replenishment and replacement of reserve seeds and seeds to be discharged.

[0064] like Figure 1 and Figure 3 As shown, a mechanical seed metering device according to an embodiment of the present invention further includes:

[0065] The seed discharge port 12 is located on the side of the first housing 1;

[0066] The separator 5 is disposed on the first housing 1 and is disposed corresponding to the seed discharge port 12, and is used to separate the seeds to be discharged and the stored seeds.

[0067] Understandably, the separator 5 is located inside the seed outlet 12 to separate the reserve seeds from the seeds to be discharged, so that only the seeds to be discharged are discharged from the seed outlet 12, while the reserve seeds slide down through the separator 5 to the first receiving part 41 and become new seeds to be discharged.

[0068] According to an embodiment of the present invention, a mechanical seed metering device includes a separator 5 comprising:

[0069] Mounting component 51 is disposed on the side of the first housing 1 away from the second housing 2;

[0070] The barrier 52 is connected to the mounting member 51 on one side and extends into the seed dispensing chamber 11 on the other side, and is inserted into the gap between the first receiving part 41 and the second receiving part 42.

[0071] A mechanical seed metering device is provided according to an embodiment of this utility model.

[0072] The arrangement range of the barrier 52 along the circumference of the seeding tray 4 is adjustable.

[0073] In some possible implementations, the first housing 1 is provided with a slot, the mounting member 51 is a plate that is detachably connected to the first housing 1, and the barrier member 52 extends through the slot into the seed dispensing chamber 11; wherein, the length of the slot is relatively large to accommodate barrier members 52 of different lengths; that is, due to the special structure of the first receiving part 41 and the second receiving part 42 in this embodiment, the stored seeds and the seeds to be dispensed will not fall off due to the rotation of the seed dispensing tray 4 before dispensing. Therefore, the arrangement range of the barrier member 52 on the seed dispensing tray 4 can be adjusted according to actual needs. It can occupy one-quarter or more of the circumference of the seed dispensing tray 4, as long as the barrier member 52 can cover the seed dispensing opening 12.

[0074] A mechanical seed metering device is provided according to an embodiment of this utility model.

[0075] The barrier 52 is a flexible barrier 52.

[0076] In some possible implementations, the barrier 52 is a brush that can block the seeds to be discharged and the stored seeds without damaging them.

[0077] A mechanical seed metering device according to an embodiment of the present invention further includes:

[0078] Seed box 6 is located on the side of the first shell 1 away from the second shell 2, and seed box 6 is connected to seed discharge chamber 11.

[0079] Furthermore, in a specific embodiment of this utility model, the working process of the mechanical seed metering device is as follows:

[0080] In this embodiment, soybean seeds are used. During operation, the seeds are piled up in the seed dispensing chamber 11 via the seed box 6. Driven by the motor, the rotating shaft 3 drives the seed dispensing disc 4 to rotate counterclockwise. The centrifugal force generated by the rotation of the seed dispensing disc 4 and the seed disturbance protrusions cause the stationary seed population to enter a discrete state. Some seeds are filled under the guidance of gravity and the seed disturbance angle θ, and are arranged in an orderly manner along the channel 43 to fill the space between adjacent first receiving parts 41 and adjacent second receiving parts 42. Subsequently, the seeds located in the first receiving parts 41 and the second receiving parts 42 rotate with the seed dispensing disc 4. The excess seeds in the channel 43 fall back into the seed population in the seed dispensing chamber 11 from the inclined surface along the seed disturbance protrusion due to the change in the direction of gravity, completing the seed cleaning. The single reserve seeds remaining on the second concave surface 421 and the single seeds to be dispensed on the first concave surface 411 continue to rotate with the seed dispensing disc 4. Subsequently, the single reserve seeds fall to the second concave surface 421 of the second receiving part 42 under the action of gravity, completing the seed preparation process. During the seed protection stage, the segment barrier 52 separates the first receiving part 41 and the second receiving part 42. At this time, the seeds to be discharged are detached from the first concave surface 411 by gravity and are received by the barrier 52 and the back of the previous first receiving part 41, and then roll close to the inner wall of the seed discharging chamber 11. Subsequently, the seeds to be discharged continue to follow the first receiving part 41 to the seed discharging port 12. Losing the support of the first housing 1, they are thrown out from the seed discharging port 12, and the seed discharging device enters the next round of filling. The reserve seeds come into contact with the barrier 52 under the action of gravity, and then fall into the first concave surface 411 of the first receiving part 41 after losing the support of the barrier 52, completing the pre-filling. Finally, the seeds in the seed replenishment channel 43 are added, and so on to realize the seed discharging operation. Through the above working principle of the device, the seed filling qualification index can be significantly improved and the operation quality of the seed discharging device can be guaranteed.

[0081] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mechanical seed metering device, characterized in that, include: The first shell (1) has an open side to form a seed discharge chamber (11). The second housing (2) is connected to the open side of the first housing (1); A seed metering disc (4) is disposed in the seed metering cavity (11). The seed metering disc (4) is rotatably connected to the second housing (2) via a rotating shaft (3). The seed metering disc (4) has a seed metering structure formed circumferentially on the side of the first housing (1). The seeding structure includes: Multiple first receiving parts (41) are evenly distributed around the seed metering disc (4) in the circumference; Multiple second receiving parts (42) are disposed on the side of the first receiving part (41) near the rotation axis of the seeding tray (4), and are arranged at intervals corresponding to the first receiving part (41). Both the first receiving part (41) and the second receiving part (42) have receiving surfaces for receiving the seed.

2. The mechanical seed metering device according to claim 1, characterized in that, A channel (43) for seeds to pass through is formed between adjacent first receiving parts (41) and between adjacent second receiving parts (42). During the rotation of the seed metering disc (4), the seeds are placed on the receiving surfaces of the first receiving part (41) and the second receiving part (42) through the channel (43).

3. The mechanical seed metering device according to claim 2, characterized in that, The second receiving part (42) forms an angle with the first receiving part (41) to guide the seed and allow the seed to enter the channel (43). Wherein, the included angle is less than ninety degrees.

4. The mechanical seed metering device according to claim 1, characterized in that, The receiving surface of the first receiving part (41) is a first concave surface (411) extending toward the side away from the rotation direction of the seed dispensing plate (4), which is used to receive and dispensing seeds.

5. The mechanical seed metering device according to claim 1, characterized in that, The receiving surface of the second receiving part (42) is a second concave surface (421) extending toward the side away from the first receiving part (41), and is used to receive the stored seeds.

6. The mechanical seed metering device according to any one of claims 1-5, characterized in that, Also includes: The seed outlet (12) is located on the side of the first housing (1); A separator (5) is provided on the first housing (1) and corresponding to the seed outlet (12) for separating the seeds to be discharged and the stored seeds.

7. The mechanical seed meter according to claim 6, wherein, The partition (5) includes: Mounting component (51) is disposed on the side of the first housing (1) away from the second housing (2); A barrier (52) is provided, one side of which is connected to the mounting member (51), and the other side of which extends into the seeding chamber (11) and is inserted into the gap between the first receiving part (41) and the second receiving part (42).

8. The mechanical seed metering device according to claim 7, characterized in that, The arrangement range of the barrier (52) along the circumference of the seeding tray (4) is adjustable.

9. The mechanical seed metering device according to claim 7, characterized in that, The barrier (52) is a flexible barrier (52).

10. The mechanical seed meter according to any of claims 1-5, wherein, Also includes: The seed box (6) is located on the side of the first housing (1) away from the second housing (2), and the seed box (6) is connected to the seed discharge chamber (11).

Images