Seeding core structure of seeding box and seeding box

Abstract

A seed metering core structure of a seeding box comprises a roller, hobbing teeth are formed on the periphery of the roller, a detachable material limiting piece is arranged on the periphery of the roller in a sleeving mode, and a first limiting part capable of limiting the material limiting piece to move in the axial direction and a second limiting part capable of limiting the material limiting piece to rotate in the circumferential direction along with the roller are further formed on the material limiting piece. However, when seeds with a very small seeding quantity need to be put, the axial width of the hobbing teeth arranged on the roller can be effectively shortened only by installing the material limiting part, so that the putting quantity is rapidly reduced, and the material limiting part can adapt to putting scenes with very large seeding quantity and putting scenes with very small seeding quantity; meanwhile, a limiting structure is arranged to prevent the material limiting piece from rotating, so that an overlarge gap cannot be formed between the material limiting piece and the inner wall of the seeding box shell, accidental leakage of the seeds is avoided, and the risk that the seeds are crushed accidentally is reduced. The utility model further provides a seeding box provided with the seeding core structure of the seeding box.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a seed-dispensing core structure for a seed-dispensing box, and also to a seed-dispensing box. Background Technology

[0002] Seeding and fertilizing devices are frequently used agricultural machinery in agricultural production, and the seeding and fertilizing box is an essential dispensing mechanism for these devices. The box controls the amount of seeds or fertilizer dispensed as needed. Conventional seeding and fertilizing boxes typically consist of a toothed roller inside a casing. Driven by a motor, the roller rotates, dispensing seeds or fertilizer from the outlet of the casing. However, this type of device has its problems. The seeds or fertilizer are dispensed through a channel formed by the gap between the outer circumference of the roller and the inner wall of the casing. Due to structural limitations, the size of this channel is generally not adjustable. When encountering larger seeds, this can cause blockage, crushing, or damage as they pass through the channel, affecting subsequent use.

[0003] In response to this situation, an improved sowing and fertilizing box later emerged. For details, please refer to the "Seed Core Structure of Sowing Box" disclosed in Chinese Utility Model Patent Application No. 202420966625.2 (Authorization Announcement No. CN 222302370U). It includes a shell and a roller. The shell is provided with an inlet and an outlet. The outer circumference of the roller is provided with rolling teeth. The shell is provided with a tongue plate adapted to the roller. There is a feeding channel formed by the gap between the inner arc wall of the tongue plate and the outer circumference of the roller. The seeds or fertilizer at the inlet enter the feeding channel under the drive of the roller and fall from the outlet. Since the tongue plate is elastic, the feeding channel can achieve compression and buffering under the elastic deformation of the tongue plate, so that the feeding of seeds or fertilizer can be smoother.

[0004] However, since the seeding box also needs to be adapted to crops with large seeding rates, such as wheat, which typically requires 60 to 70 jin of seeds per mu, the opening of the seeding box must be made very large. When encountering crops with small seeding rates, such as rapeseed which only requires about 0.5 jin of seeds per mu, the original seeding box structure is not very suitable. Although we can reduce the seeding rate by lowering the motor speed, the motor speed cannot be set too low due to the limitations of the drive structure. Therefore, the usual method is to replace the entire seeding box to adapt to crops with small seeding rates, which undoubtedly increases additional waste and replacement costs.

[0005] Therefore, how to design an improved seed box seeding core structure that can adapt to both large and small seeding scenarios, and achieve precise seeding even with small seeding amounts, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a seed box seed core structure that can adapt to both large-scale and small-scale seeding scenarios, and can achieve precise seeding even with small-scale seeding.

[0007] The second technical problem to be solved by this utility model is to provide a seed box with the seed box seed core structure installed, in view of the above-mentioned technical status.

[0008] The technical solution adopted by this utility model to solve the first technical problem is as follows: the seed-discharging core structure of the seed-discharging box includes a roller, which is rotatably set, and the outer periphery of the roller is provided with roller teeth for driving the seeds to be discharged.

[0009] It also includes

[0010] A material limiting component is used to shorten the axial feeding width of the hobbing teeth on the roller. The material limiting component is detachably provided on the first end of the roller.

[0011] A limiting structure is used to prevent the limiting element from rotating and constrain it to the first end of the roller.

[0012] To optimize the overall structure of the roller and enable it to adapt to more application scenarios with different seeding rates, the roller preferably includes a first sleeve, a second sleeve, a first bushing, and a second bushing. The first bushing and the second bushing are axially interlocked and have the same axis. The first sleeve is detachably fixed to the first bushing, and the second sleeve is detachably fixed to the second bushing. The gear hobbing is formed on the outer periphery of the first sleeve and the second sleeve.

[0013] In order to enable the roller to better form an axial limit on the seed box, preferably, the roller also includes a fixing sleeve, which is provided on the end of the first bushing away from the first end of the roller to limit the first bushing from axially disengaging outward, and the limiting element is provided on the second bushing.

[0014] To optimize the overall layout of the limiting structure, preferably, the limiting structure includes an axial limiting structure that restricts the material limiting member from moving axially and a radial limiting structure that restricts the material limiting member from rotating circumferentially with the roller.

[0015] In order to better form the axial limiting structure and the radial limiting structure, preferably, the axial limiting structure includes a first stepped surface formed on the limiting member and perpendicular to its own axis, and a second stepped surface formed on the outer periphery of the second bushing and capable of axially abutting against the first stepped surface.

[0016] The radial limiting structure includes a baffle formed on the outer periphery of the limiting member, which protrudes radially and abuts against the tongue of the seed box.

[0017] In order to enable both the first sleeve and the second sleeve to be better driven by the external power shaft and to enable both the first sleeve and the second sleeve to be better axially fixed on the corresponding first bushing and second bushing, preferably, the first bushing and the second bushing are both formed with a first polygonal hole for easy connection to the external power shaft, the first bushing and the second bushing are both formed with a polygonal cross-section insertion part, the first sleeve and the second sleeve are both formed with a second polygonal hole adapted to the insertion part, the first sleeve is also formed with a third stepped surface that can abut against the first bushing to limit its own axial movement, and the second sleeve is also formed with a fourth stepped surface that can abut against the second bushing to limit its own axial movement.

[0018] In order to enable the seeds to flow more accurately to the rolling teeth of the second sleeve, preferably, the limiting member is also formed with a guide wall for guiding the seeds to the rolling teeth of the second sleeve, and the top of the guide wall is formed with a guide slope to facilitate the seeds to enter from top to bottom.

[0019] The technical solution adopted by this utility model to solve the second technical problem is as follows: a seeding box, including a shell, with an inlet and an outlet formed on the shell, and the above-mentioned seeding box seed core structure is detachably provided inside the shell. The shell is also provided with an arc-shaped tongue plate for fitting the roller. The inner arc wall of the tongue plate and the outer periphery of the roller have a feeding channel formed by the gap. The limiting member is provided on the side wall of the shell and can abut against the inner side wall of the shell to restrict it from falling outward along the axial direction. The second limiting part of the limiting member abuts against the lower end of the tongue plate.

[0020] In order to better form two independent feeding channels within the shell, so that users can choose the feeding channel that suits their actual needs for seeding, preferably, the shell is also provided with a partition that can divide the feeding channel inside the shell into a first feeding channel and a second feeding channel. The partition is located between the first sleeve and the second sleeve, with the first sleeve inside the first feeding channel and the second sleeve inside the second feeding channel.

[0021] To avoid interference between the first and second feeding channels and thus affect their precise dispensing, preferably, the top of the first and second feeding channels are respectively provided with a first cover plate and a second cover plate.

[0022] Compared with existing technologies, the advantages of this invention are as follows: By installing a detachable limiting component on the outer circumference of the drum, the axial feeding width of the toothed section on the drum is shortened. When a small amount of seeds needs to be sown, simply installing this limiting component effectively shortens the axial width of the toothed section on the drum, thereby quickly reducing the amount of seeds sown at the same time. This avoids the drawbacks of existing technologies that require reducing the motor speed or replacing the entire seeding box to solve the problem. It is adaptable to both scenarios with large and small seeding volumes, reducing unnecessary replacement costs. Furthermore, by setting a limiting structure, the limiting component does not rotate circumferentially or move axially with the drum, ensuring that the limiting component and the seeding box shell remain relatively stationary. This prevents excessive gaps between the limiting component and the inner wall of the seeding box shell, thus avoiding uncontrolled accidental seed leakage that could affect accurate sowing and significantly reducing the risk of accidental seed crushing. In addition, a seeding box with this seeding core structure is also provided. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the seed-rearing core structure of the seed box in this embodiment;

[0024] Figure 2 This is a three-dimensional structural diagram of the seed-rearing core structure of the seed box in this embodiment from another angle;

[0025] Figure 3 This is a schematic diagram of the exploded state structure of the seed-discharging core structure of the seed box in this embodiment;

[0026] Figure 4 This is a schematic diagram of the seed-rearing core structure of the seed box from another angle in this embodiment;

[0027] Figure 5 This is a cross-sectional view of the seed-laying core structure of the seed box in this embodiment;

[0028] Figure 6 This is a three-dimensional structural diagram of the seeding box in this embodiment;

[0029] Figure 7 This is a schematic diagram of the exploded state structure of the seeding box in this embodiment;

[0030] Figure 8 This is a schematic diagram of the first cross-sectional structure of the seeding box in this embodiment (cross-section perpendicular to the length direction of the roller);

[0031] Figure 9 This is a schematic diagram of the second cross-sectional structure of the seeding box in this embodiment (cross-section along the length of the roller). Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-5 The image shown is a preferred embodiment of the seed-discharging core structure of the seed-discharging box in this utility model. The seed-discharging core structure in this embodiment mainly includes a roller 1, a material-limiting component 2, and a positioning structure, etc.

[0034] refer to Figures 1 to 5 As shown, in this embodiment, the roller 1 can rotate around its own axis under the drive of an external motor. The roller 1 includes a first sleeve 11, a second sleeve 12, a first bushing 13, a second bushing 14, and a fixing sleeve 15. The first bushing 13 and the second bushing 14 are inserted into each other along the axial direction and form the same axis. The first sleeve 11 is detachably fixed to the first bushing 13, and the second sleeve 12 is detachably fixed to the second bushing 14. Hobbing teeth 1a are provided on the outer periphery of both the first sleeve 11 and the second sleeve 12.

[0035] The limiting component 2 is detachably disposed on the first end of the roller 1, that is, on the end of the second bushing 14 away from the first bushing 13. It is mainly used to shorten the axial feeding width of the hobbing teeth 1a on the roller 1. The fixing sleeve 15 is disposed on the end of the first bushing 13 away from the first end of the roller 1. It is mainly used to restrict the first sleeve 11 from detaching axially outward. The limiting structure here is mainly used to constrain the limiting component 2 to the first end of the roller 1 in a non-rotatable manner.

[0036] refer to Figures 3 to 5 As shown, the limiting structure in this embodiment includes an axial limiting structure and a radial limiting structure. The axial limiting structure can restrict the material limiting member from moving axially, and the radial limiting structure can restrict the material limiting member 1 from rotating circumferentially with the roller.

[0037] The axial limiting structure here includes a first stepped surface 2a formed on the limiting member 2 and perpendicular to its own axis, and a second stepped surface 14a formed on the outer periphery of the second bushing 14 and capable of axially abutting against the first stepped surface 2a; the radial limiting structure here includes a baffle 2b formed on the outer periphery of the limiting member 2, protruding radially and capable of abutting against the tongue of the seeding box.

[0038] In this embodiment, in order to better enable both the first sleeve 11 and the second sleeve 12 to be driven by the external power shaft connected to the motor, and to better axially fix the first sleeve 11 and the second sleeve 12 on the corresponding first bushing 13 and second bushing 14, refer to... Figure 3 and Figure 4As shown, in this embodiment, both the first bushing 13 and the second bushing 14 have a first polygonal hole 13a inside for easy connection to an external power shaft. Both the first bushing 13 and the second bushing 14 have a plug-in portion 13b with a polygonal cross-section. Both the first sleeve 11 and the second sleeve 12 have a second polygonal hole 11a that can fit the plug-in portion 13b. The first sleeve 11 also has a third stepped surface 11b that can abut against the first bushing 13 to limit its axial movement. The second sleeve 12 also has a fourth stepped surface 12a that can abut against the second bushing 14 to limit its axial movement. By connecting to an external power shaft, the entire drum is driven to rotate, and the seeds are finally fed.

[0039] In addition, to ensure that the seeds flow more precisely to the toothed rollers 1a of the second sleeve 12, refer to Figure 4 As shown, in this embodiment, a guide wall 2c is specially formed on the limiting member 2 to guide the seeds to the hobbing teeth 1a of the second sleeve 12. The top of the guide wall 2c is formed with a guide slope 2c1 that facilitates the seeds to enter from top to bottom.

[0040] In this embodiment, a seed box with the seed-dispensing core structure is also provided; please refer to [reference needed]. Figures 6 to 9 As shown, the seeding box includes a housing 3, on which an inlet 3b and an outlet 3c are formed. The seeding box seed core structure is detachably installed inside the housing 3. The fixing sleeves 15 and the limiting components 2 located at both ends of the roller are provided on the side walls of the housing 3. At the same time, the fixing sleeves 15 and the limiting components 2 can each abut against two opposite inner side walls of the housing 3 to restrict the entire roller 1 from moving axially.

[0041] In this embodiment, the housing 3 is further provided with an arc-shaped tongue 4 for fitting the roller 1. The inner arc wall of the tongue 4 and the outer periphery of the roller 1 have a feeding channel 3a formed by the gap. The second limiting part of the limiting member 2 abuts against the lower end of the tongue 4, thereby limiting the limiting member 2 by the tongue 4 and preventing the limiting member 2 from rotating synchronously with the second sleeve 12. Of course, the baffle 2b can also directly abut against the housing of the seeding box to restrict the limiting member 1 from rotating freely around the roller.

[0042] In this embodiment, in order to better form two independent feeding channels within the housing 3, reference is made. Figures 7 to 9 As shown, the housing 3 is also provided with a partition 5 that can divide the material feeding channel 3a inside the housing 3 into a first material feeding channel 3a1 and a second material feeding channel 3a2. The partition 5 is located between the first sleeve 11 and the second sleeve 12. The first sleeve 11 is built into the first material feeding channel 3a1 and the second sleeve 12 is built into the second material feeding channel 3a2.

[0043] Furthermore, to avoid interference between the first feeding channel 3a1 and the second feeding channel 3a2, affecting their respective accurate dispensing, refer to Figure 1 and Figure 2 As shown, the top of the first feeding channel 3a1 and the second feeding channel 3a2 are respectively provided with a first cover plate 6 and a second cover plate 7.

[0044] It is also necessary to further explain that in this embodiment, by fitting a detachable limiting component 2 around the outer periphery of the roller 1, the axial width of the roller 1 with the toothed rollers 1a is shortened. When a small amount of seeds needs to be sown, simply installing the limiting component 2 can effectively shorten the axial width of the roller 1 with the toothed rollers 1a, thereby quickly reducing the amount of seeds sown at the same time. This avoids the drawbacks of existing technologies that require reducing the motor speed or replacing the entire sowing box to solve the problem. It can adapt to both scenarios with large and small sowing amounts, reducing unnecessary replacement costs. Furthermore, by setting a limiting structure, the limiting component 2 will not rotate circumferentially or move axially with the roller 1, ensuring that the limiting component 2 and the sowing box shell remain relatively stationary. This prevents excessive gaps between the limiting component 2 and the inner wall of the sowing box shell, thus avoiding uncontrolled accidental leakage of seeds that could affect subsequent accurate sowing. It also greatly reduces the risk of seeds being accidentally crushed, making the application scenarios of the sowing box with this seed core more extensive.

[0045] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A seed-dispensing core structure for a seed-dispensing box, comprising: The roller (1) is rotatably configured, and the outer periphery of the roller (1) is provided with a toothed roller (1a) for driving the seed to be fed out; Its characteristic is that it also includes: Material limiting component (2) is used to shorten the axial feeding width of the hobbing teeth (1a) on the roller (1). The material limiting component (2) is detachably provided on the first end of the roller (1). A limiting structure is provided to prevent the limiting member (2) from being rotatably constrained to the first end of the roller (1).

2. The seed-rearing core structure of the seed box according to claim 1, characterized in that: The roller (1) includes a first sleeve (11), a second sleeve (12), a first bushing (13), and a second bushing (14). The first bushing (13) and the second bushing (14) are axially inserted into each other and have the same axis. The first sleeve (11) is detachably fixed to the first bushing (13), and the second sleeve (12) is detachably fixed to the second bushing (14). The hobbing gear (1a) is formed on the outer periphery of the first sleeve (11) and the second sleeve (12).

3. The seed-rearing box and seed-discharging core structure according to claim 2, characterized in that: The roller (1) also includes a fixing sleeve (15), which is located on the end of the first bushing (13) away from the first end of the roller (1) to restrict the first bushing (11) from detaching outward along the axial direction. The limiting member (2) is located on the second bushing (14).

4. The seed-rearing box and seed-discharging core structure according to claim 1, characterized in that: The limiting structure includes an axial limiting structure that restricts the material limiting member from moving axially and a radial limiting structure that restricts the material limiting member from rotating circumferentially with the roller.

5. The seed-rearing box and seed-discharging core structure according to claim 4, characterized in that: The axial limiting structure includes a first stepped surface (2a) formed on the limiting member and perpendicular to its own axis, and a second stepped surface (14a) formed on the outer periphery of the second bushing (14) and capable of axially abutting against the first stepped surface (2a); The radial limiting structure includes a baffle (2b) formed on the outer periphery of the limiting member (2) and protruding radially to abut against the tongue of the seed box.

6. The seed-dispensing core structure of the seed box according to claim 2, characterized in that: The first bushing (13) and the second bushing (14) each have a first polygonal hole (13a) inside for easy connection to an external power shaft. The first bushing (13) and the second bushing (14) each have a plug-in portion (13b) with a polygonal cross-section. The first sleeve (11) and the second sleeve (12) each have a second polygonal hole (11a) adapted to the plug-in portion (13b). The first sleeve (11) also has a third stepped surface (11b) that can abut against the first bushing (13) to limit its own axial movement. The second sleeve (12) also has a fourth stepped surface (12a) that can abut against the second bushing (14) to limit its own axial movement.

7. The seed-rearing box seed core structure according to any one of claims 1 to 6, characterized in that: The limiting member (2) is also formed with a guide wall (2c) for guiding the seeds to the rolling teeth (1a) of the second sleeve (12), and the top of the guide wall (2c) is formed with a guide slope (2c1) to facilitate the seeds to enter from top to bottom.

8. A seeding box, comprising a shell (3) having an inlet (3b) and an outlet (3c) formed thereon, characterized in that: The housing (3) is detachably provided with the seed box seed core structure as described in claim 7. The housing (3) is also provided with an arc-shaped tongue plate (4) for adapting to the roller (1). The inner arc wall of the tongue plate (4) and the outer periphery of the roller (1) have a feeding channel (3a) formed by the gap. The limiting member (2) is provided on the side wall of the housing (3) and can abut against the inner side wall of the housing (3) to limit its axial outward fall. The second limiting part of the limiting member (2) abuts against the lower end of the tongue plate (4).

9. The seeding box according to claim 8, characterized in that: The housing (3) is also provided with a partition (5) that can divide the material feeding channel (3a) inside the housing (3) into a first material feeding channel (3a1) and a second material feeding channel (3a2). The partition (5) is located between the first sleeve (11) and the second sleeve (12). The first sleeve (11) is built into the first material feeding channel (3a1), and the second sleeve (12) is built into the second material feeding channel (3a2).

10. The seeding box according to claim 9, characterized in that: The top of the first feeding channel (3a1) and the second feeding channel (3a2) are respectively provided with a first cover plate (6) and a second cover plate (7).

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