A furrow opening seed metering mechanism

Abstract

The application provides a nest eye type seed arranging mechanism, which comprises a seat body, a seed arranging wheel and a circular arc type seed protecting plate installed on the seat body, the seed arranging wheel is provided with nest eye type filling grooves, and the seed arranging wheel is driven to rotate by a driving mechanism; the application further comprises a seed cleaning mechanism for cleaning the filling grooves; the seed cleaning mechanism comprises a seed cleaning wheel coaxially fixedly installed with a first gear, and the seed cleaning wheel is provided with a circumferential array layout of ejector pins; the driving mechanism comprises the first gear coaxially fixed with the seed cleaning wheel; the application further comprises an inner gear ring coaxially fixed with the seed arranging wheel, and the first gear is engaged with the inner gear ring; the bottom of each filling groove is provided with a slit for embedding the ejector pin. The engagement relationship between the first gear and the inner gear ring ensures the stability of the seed arranging wheel movement, fully coordinates the action rhythm of the ejector pins to the filling grooves, and the ejector pins do not bear the transmission function except for acting on the seeds in the filling grooves, so that a good seed cleaning effect is realized. The structure has low implementation cost and high operation reliability.

Description

Technical Field

[0001] This invention relates to the field of seeding machinery technology, and in particular to a seed-metering mechanism with a seed-metering hole. Background Technology

[0002] Seed metering devices are an important component of sowing machinery. Precision seed metering using a seed metering structure with a seed filling groove and a seed guard plate is a common method in existing technology. However, this type of metering mechanism suffers from the problem of the seed filling groove easily becoming clogged. To address this issue, patent CN201194476Y discloses a needle valve type precision anti-clogging seed metering device for rapeseed. This patent features an anti-clogging needle valve for each seed storage and transportation compartment, and a pushing mechanism that moves the needle valve at the seed metering position achieves the seed metering function. The disadvantages of this structure are that it requires an anti-clogging needle valve for each seed storage and transportation compartment, resulting in higher costs, and the needle valve itself is prone to mechanical failure due to jamming, leading to relatively low stability.

[0003] Patent CN208821198U includes the idea of ​​using a cleaning roller for unclogging. The cleaning roller has cleaning teeth, which cooperate with suction holes on the roller to both unclogging and drive the cleaning roller to rotate. In this solution, the interaction between the cleaning teeth and the suction holes serves both to unclogging and to drive the rotation. However, since the cooperation between the cleaning teeth and the suction holes is not a conventional mechanical transmission method, in actual use, there are defects such as excessive impact, fluctuations in the rotation of the cleaning roller, and rapid wear of the cleaning teeth. It is also prone to mechanical failures such as the cleaning teeth and suction holes not meshing properly, resulting in low operational reliability and lifespan. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a seed metering mechanism with reasonable structure design, low implementation cost and high operational reliability.

[0005] Technical solution: To achieve the above objectives, the present invention provides a seed metering mechanism with a recessed eye, which includes a base and a seed metering wheel and an arc-shaped seed protection plate mounted on the base. The seed metering wheel has a recessed eye-shaped seed filling groove, and the seed metering wheel is driven by a drive mechanism. It also includes a seed cleaning mechanism for cleaning the seed filling groove.

[0006] The driving mechanism includes an internal gear ring and a first gear that mesh with each other, and the seed cleaning mechanism includes a seed cleaning wheel that is fixedly installed coaxially with the first gear, and the seed cleaning wheel has pins arranged in a circumferential array.

[0007] The internal gear ring is coaxially fixed with the seed metering wheel, and the center of the first gear is relative to the seed metering wheel. The bottom of each seed filling groove has a slit for the ejector pin to insert into. The number of teeth on the first gear is the same as the number of ejector pins on the seed cleaning wheel, and the number of teeth on the internal gear ring is the same as the number of seed filling grooves. Each tooth root position on the internal gear ring has a seed filling groove aligned radially with it. In this way, while the first gear and the internal gear ring are meshing, the ejector pins on the seed filling grooves can act on the seed filling grooves corresponding to the positions on the lower side of the seed guard plate, pushing out the seeds in the seed filling grooves and achieving full seed metering.

[0008] In the above structure, the first gear rotates at the same speed as the seed cleaning wheel. By optimizing the layout, the meshing relationship between the first gear and the internal gear ring can be used to ensure the smoothness of the seed dispensing wheel's movement, fully coordinate the action rhythm of the top pin on the seed filling groove, and achieve a good seed cleaning effect.

[0009] Furthermore, a second gear, coaxially arranged with the seed metering wheel, is installed on the inner side of the seed metering wheel. The second gear meshes with the first gear and is connected to the power input shaft. Thus, the power input shaft is centrally positioned relative to the seed metering wheel, facilitating power input. The combination of the first gear, the second gear, and the internal gear ring not only serves as a power transmission mechanism but also as a speed reduction mechanism, decelerating the input power before outputting it to the seed metering wheel.

[0010] Furthermore, viewed radially from the seeding wheel, the outer contour of the slit is a toothed shape that gradually narrows away from the center. This shape matches the movement trajectory of the tip of the ejector pin, which reduces the size of the slot while preventing interference.

[0011] Furthermore, the seeding wheel has a circular hollow section in the middle; the base is provided with a first support wheel arranged in a circular array, and the first support wheel abuts against the wall of the circular hollow section.

[0012] Furthermore, second support wheels are provided between both sides of the seed metering wheel and the base. This structure allows for reliable installation of the seed metering wheel.

[0013] Beneficial effects: The seed metering mechanism of this invention utilizes the meshing relationship between the first gear and the internal gear ring to ensure the smooth movement of the seed metering wheel, fully coordinating the action rhythm of the ejector pin in the seed filling groove. The ejector pin, besides acting on the seeds in the filling groove, does not need to perform a transmission function, thus achieving excellent seed cleaning effect. This structure is low in cost and highly reliable in operation. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a seed metering mechanism with a seed-filling hole (the first gear in the diagram is located behind the seed-cleaning wheel);

[0015] Figure 2This is a magnified view of a recessed seed metering mechanism.

[0016] In the diagram: 1-Seed feeding wheel; 11-Seed filling groove; 12-Slit; 2-Seed protection plate; 3-Drive mechanism; 31-Internal gear ring; 32-First gear; 33-Second gear; 34-Power input shaft; 4-Seed cleaning mechanism; 41-Seed cleaning wheel; 42-Ejector pin; 5-First support wheel; 6-Second support wheel; 10-Base. Detailed Implementation

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] like Figure 1 The seed metering mechanism shown includes a base 10 and a seed metering wheel 1 and an arc-shaped seed protection plate 2 mounted on the base 10. The seed metering wheel 1 has a seed filling groove 11 with a hole shape, and the seed metering wheel 1 is driven by a drive mechanism 3. It also includes a seed cleaning mechanism 4 for cleaning the seed filling groove 11.

[0019] The driving mechanism 3 includes an internal gear ring 31 and a first gear 32 that mesh with each other, and the seed cleaning mechanism 4 includes a seed cleaning wheel 41 that is fixedly installed coaxially with the first gear 32. The seed cleaning wheel 41 has pins 42 arranged in a circular array.

[0020] The internal gear ring 31 is coaxially fixed with the seed metering wheel 1, and the center of the first gear 32 is relative to the seed metering wheel 1; the bottom of the seed filling groove 11 has a slit 12 for the ejector pin 42 to be inserted.

[0021] The number of teeth on the first gear 32 is the same as the number of ejector pins 42 on the seed cleaning wheel 41, and the number of teeth on the inner gear ring 31 is the same as the number of filling grooves 11, such as... Figure 2 As shown, each tooth root of the internal gear ring 31 has a seed filling groove 11 at its midpoint, which is radially aligned with the seed filling groove 11. Thus, while the first gear 32 meshes with the internal gear ring 31, the ejector pin 42 on the seed filling groove 11 can act on the seed filling groove 11 corresponding to the lower side of the seed protection plate 2, pushing out the seeds in the seed filling groove 11 and achieving full seeding.

[0022] In the above structure, the first gear 32 and the seed cleaning wheel 41 rotate at the same speed. By optimizing the layout, the meshing relationship between the first gear 32 and the internal gear ring 31 can be used to ensure the smoothness of the movement of the seed metering wheel 1 and fully coordinate the action rhythm of the ejector pin 42 on the seed filling groove 11. The ejector pin 42 does not need to bear the transmission function except for acting on the seeds in the seed filling groove 11, thus achieving a good seed cleaning effect.

[0023] Preferably, a second gear 33 is also installed coaxially with the inner side of the seed metering wheel 1. The second gear 33 meshes with the first gear 32, and the second gear 33 is connected to the power input shaft 34. In this way, the power input shaft 34 is centrally located relative to the seed metering wheel 1, which facilitates the input of power. The combination of the first gear 32, the second gear 33, and the internal gear ring 31 not only serves as a power transmission mechanism but also as a speed reduction mechanism, which can reduce the input power before outputting it to the seed metering wheel 1.

[0024] Preferably, viewed radially from the seed metering wheel 1, the outer contour of the slit 12 is a toothed shape that gradually narrows away from the center. This shape matches the movement trajectory of the tip of the ejector pin 42, reducing the size of the slot while preventing interference. Preferably, the two side edges of the slit 12 are involutes.

[0025] Preferably, the seed metering wheel 1 has a circular hollow portion in the middle; the base 10 is provided with a first support wheel 5 arranged in a circular array, and the first support wheel 5 abuts against the wall of the circular hollow portion. Second support wheels 6 are provided on both sides of the seed metering wheel 1 between it and the base 10. With the above structure, the seed metering wheel 1 can be reliably installed.

[0026] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A seed metering mechanism with a recessed hole, comprising a base (10) and a seed metering wheel (1) and an arc-shaped seed guard plate (2) mounted on the base (10), wherein the seed metering wheel (1) has a recessed hole-shaped seed filling groove (11) and the seed metering wheel (1) is driven by a drive mechanism (3); further comprising a seed cleaning mechanism (4) for cleaning the seed filling groove (11); wherein the seed cleaning mechanism (4) comprises a seed cleaning wheel (41) coaxially fixedly mounted with a first gear (32), and the seed cleaning wheel (41) has a circumferentially arrayed pins (42); Its features are: The drive mechanism (3) includes a first gear (32) fixed coaxially with the seed cleaning wheel (41); it also includes an internal gear ring (31) fixed coaxially with the seed discharging wheel (1), the first gear (32) meshing with the internal gear ring (31); the bottom of the filling groove (11) has a slit (12) for the ejector pin (42) to be inserted; Viewed radially from the seeding wheel (1), the outer contour of the slit (12) is toothed and gradually narrows in the direction away from the center; the two sides of the slit (12) are involutes.

2. The seed metering mechanism according to claim 1, characterized in that, The inner side of the seeding wheel (1) is also equipped with a second gear (33) arranged coaxially with it. The second gear (33) meshes with the first gear (32), and the second gear (33) is connected to the power input shaft (34).

3. The seed metering mechanism according to claim 1, characterized in that, The seeding wheel (1) has a circular hollow section in the middle; the base (10) is provided with a first support wheel (5) arranged in a circular array, and the first support wheel (5) abuts against the wall of the circular hollow section.

4. The seed metering mechanism with recessed holes according to claim 1, characterized in that, A second support wheel (6) is provided between each side of the seeding wheel (1) and the seat (10).

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