Seed-metering device

Abstract

The application is a seeding machine discharging clutch mechanism, comprising: multiple coaxial separators; a pull shaft penetrating the multiple separators; a large seed wheel and a small seed wheel sleeved on the pull shaft; a first half cavity opened on one side of the large seed wheel; a second half cavity opened on one side of the separator; an annular groove opened at the center hole of the large seed wheel and located on the side of the first half cavity; a guide groove opened on the pull shaft, with a guide ball arranged in the guide groove; a limiting groove arranged on the other side of the large seed wheel; a push rod radially fixedly arranged on the outer wall of the pull shaft; a locking screw penetrating the small seed wheel, with the bottom thereof slidably connected with a sliding groove opened on the surface of the pull shaft; the pull shaft is pulled to drive the clutch mechanism to work, so as to realize the power cut-off of the large seed wheel; at the same time of the power cut-off, the large seed wheel is relatively fixed with the separator to avoid following rotation with the small seed wheel, so as to realize the independent rotation of the small seed wheel or the synchronous rotation of the large seed wheel and the small seed wheel.

Description

Technical Field

[0001] This invention relates to the field of seeders, and in particular to the feeding clutch mechanism of seeders. Background Technology

[0002] Using different types of seed metering wheels to meter different crops is a common seeding method on seeders. Currently, the common approach is to replace the seed metering wheels or close the gear set channel. The former requires removing the seed metering wheel set, replacing the required seed metering wheel, and then reinstalling it, which is difficult and time-consuming. The latter can also achieve the desired effect, but it wastes energy, with the gears running idle. Moreover, it requires a high degree of sealing, as the moving seed metering wheel set needs to be sealed and isolated, which poses a high risk of seed leakage.

[0003] In summary, how to achieve the clutch function for the independent rotation of the small seeding wheel or the synchronous rotation of the large and small seeding wheels has become an urgent problem for researchers in this field. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to achieve the clutch engagement of the small seeding wheel for independent rotation or the large seeding wheel and the small seeding wheel for synchronous rotation;

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] This invention relates to a feed clutch mechanism for a seeder, comprising: multiple spacers arranged coaxially; a pull shaft passing through the central holes of the multiple spacers; a large seed-discharging wheel and a small seed-discharging wheel, sleeved on the pull shaft and located between two of the spacers; a first semi-cavity formed on one side of the large seed-discharging wheel, with the central hole of the large seed-discharging wheel extending radially outward to form the first semi-cavity; a second semi-cavity formed on one side of the spacers, with the central hole of the spacers extending radially outward to form the second semi-cavity; an annular groove formed at the central hole of the large seed-discharging wheel and located on the side of the first semi-cavity; and a guide groove formed at the pull shaft, with a guide ball disposed within the guide groove. A limiting groove is provided on the other side of the large seed metering wheel; a push rod is radially fixed on the outer wall of the pull shaft; a set screw passes through the small seed metering wheel, and its bottom is slidably connected to a groove formed on the surface of the pull shaft; the seed metering wheel assembly consists of a large seed metering wheel and a small seed metering wheel, wherein the small seed metering wheel is narrower and has denser teeth, and is used for sowing small seeds; the large seed metering wheel is wider and has sparser teeth, and is used for sowing large seeds; during operation, the small seed metering wheel rotates continuously, while the large seed metering wheel only rotates when sowing large seeds. The pull shaft drives the clutch mechanism to work, realizing whether or not the power driving the large seed metering wheel is cut off; at the same time as the power is cut off, the large seed metering wheel is relatively fixed to the spacer sleeve to prevent it from rotating with the small seed metering wheel.

[0007] Specifically, multiple spacers are fixedly installed, the pull shaft passes through multiple spacers, and large and small seed-discharging wheels are installed between the spacers;

[0008] First state: When the large seeding wheel and the small seeding wheel need to rotate synchronously, the pull shaft is pulled axially, and the guide ball enters the annular groove from the cavity formed by the first half cavity and the second half cavity, cutting off the power between the large seeding wheel and the spacer. The push rod moves and is placed in the limiting groove. The rotational power of the pull shaft is transmitted to the small seeding wheel through the set screw and to the large seeding wheel through the push rod, driving the large seeding wheel and the small seeding wheel to rotate synchronously.

[0009] Second state: The small seeding wheel needs to rotate independently, and the large seeding wheel is locked with the spacer. The pull shaft is pushed in the opposite direction, and the guide ball rises under the guidance of the guide groove and enters the cavity formed by the first half cavity and the second half cavity. At this time, the small seeding wheel and the spacer are locked, the push rod moves and is placed outside the limit groove, and the rotational force of the pull shaft is transmitted to the small seeding wheel only through the set screw.

[0010] In summary, this invention achieves the function of clutch engagement, which allows for the independent rotation of the small seeding wheel or the synchronous rotation of the large and small seeding wheels.

[0011] To illustrate the specific structure of the first and second semi-cavities, the present invention employs semi-cylindrical holes for both the first and second semi-cavities; the inner diameter of the cavity formed by the cooperation of the first and second semi-cavities is smaller than the diameter of the guide ball;

[0012] The cavity has a cylindrical blind hole structure, which facilitates the entry of the guide ball.

[0013] To illustrate the specific structure of the annular groove, the present invention uses a first 1 / 4 spherical annular groove as the outline of the annular groove.

[0014] To illustrate the specific structure of the guide groove, the present invention uses the outline of the guide groove including: a second 1 / 4 spherical annular groove, which together with the first 1 / 4 spherical annular groove forms a semi-circular structure; and a guide slope, along the axial direction of the pull shaft, the guide slope forming a gradually expanding structure of the pull shaft.

[0015] The second 1 / 4 ball annular groove and the first 1 / 4 ball annular groove form a semi-circular structure. When the guide ball is placed in the semi-circular structure, the guide ball does not interfere with the large seeding wheel, and the large seeding wheel can rotate freely.

[0016] As the guide ball rises under the guidance of the guide slope, it enters the cavity and locks the large seeding wheel and the spacer sleeve together.

[0017] To illustrate the specific structure of the limiting groove, the present invention employs multiple ribs on the other side of the large seeding wheel, with a limiting groove formed between adjacent ribs.

[0018] The reinforcing bars are arranged radially along the side of the large seeding wheel, so that when the limiting rod abuts against the reinforcing bars, it is in line contact, which facilitates the following rotation of the large seeding wheel.

[0019] To illustrate the specific setting method of the set screw, the present invention uses the set screw to pass obliquely through the small seeding wheel, and its bottom is slidably connected to the slide groove through a limiting member;

[0020] The set screw passes obliquely through the small seeding wheel, which shortens the overall length of the set screw. When the pull shaft moves axially, the position of the set screw relative to the small seeding wheel does not change. Through the cooperation of the limiting part and the slide groove, the set screw slides relative to the bottom, so that the rotational force of the pull rod can always be transmitted to the small seeding wheel through the set screw.

[0021] After the steel ball is confined within the cavity, when the pull shaft moves axially, the steel ball will fall under the action of gravity and magnetic force, realizing the separation of the large seeding wheel from the spacer sleeve and allowing it to rotate freely. The magnetic guide ball can move under the action of magnetic force and gravity, avoiding the phenomenon of the guide ball getting stuck.

[0022] The beneficial effects of this invention are as follows: This invention is a feed clutch mechanism for a seeder. By pulling the pull shaft, the clutch mechanism is driven to work, realizing whether or not the power driving the large seed wheel is cut off. At the same time as the power is cut off, the large seed wheel and the spacer are relatively fixed, preventing it from rotating with the small seed wheel. This achieves the clutch of independent rotation of the small seed wheel or synchronous rotation of the large and small seed wheels. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the spacer structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the pull shaft of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of one side of the large seeding reel of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the other side of the large seeding reel of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the small seeding reel of the present invention;

[0030] Figure 7 This is a partial structural schematic diagram of the pull shaft of the present invention;

[0031] Figure 8 This is a partial structural schematic diagram of the first state of the present invention;

[0032] Figure 9 This is a partial structural schematic diagram of the second state of the present invention;

[0033] Figure 10 This is a diagram showing the fit between the set screw and the small seeding wheel of the present invention;

[0034] In the diagram: 1-spacer, 11-second half-cavity, 2-pull shaft, 21-guide groove, 22-push rod, 23-set screw, 24-sliding groove, 25-second 1 / 4 ball annular groove, 26-guide inclined surface, 3-large seeding wheel, 31-first half-cavity, 32-annular groove, 33-limiting groove, 34-rib, 4-small seeding wheel, 5-guide ball. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0036] like Figure 1-10 As shown, the present invention is a feed clutch mechanism for a seeder, comprising: a plurality of spacers 1 arranged coaxially; a pull shaft 2 passing through the central holes of the plurality of spacers 1; a large seed-discharging wheel 3 and a small seed-discharging wheel 4, sleeved on the pull shaft 2 and located between two of the spacers 1; a first semi-cavity 31 formed on one side of the large seed-discharging wheel 3, and the first semi-cavity 31 is radially extended outward from the central hole of the large seed-discharging wheel 3; a second semi-cavity 11 formed on one side of the spacers 1, and the second semi-cavity 11 is radially extended outward from the central hole of the spacers 1; an annular groove 32 formed at the central hole of the large seed-discharging wheel 3 and located on the side of the first semi-cavity 31; a guide groove 21 formed at the pull shaft 2, and the guide groove 21 is provided with... Guide ball 5; limiting groove 33 is provided on the other side of the large seed metering wheel 3; push rod 22 is radially fixed on the outer wall of the pull shaft 2; set screw 23 passes through the small seed metering wheel 4, and the bottom of the set screw 23 is slidably connected to the sliding groove 24 opened on the surface of the pull shaft 2; the seed metering wheel group consists of a large seed metering wheel and a small seed metering wheel, wherein the small seed metering wheel is narrower and has denser teeth, and is used for sowing small seeds; the large seed metering wheel is wider and has sparser teeth, and is used for sowing large seeds; during operation, the small seed metering wheel rotates continuously, and the large seed metering wheel only rotates when sowing large seeds. By pulling the shaft, the clutch mechanism is driven to work, realizing whether or not the power driving the large seed metering wheel is cut off; at the same time as the power is cut off, the large seed metering wheel and the spacer are relatively fixed to prevent it from rotating with the small seed metering wheel.

[0037] Specifically, multiple spacers are fixedly installed, the pull shaft passes through multiple spacers, and large and small seed-discharging wheels are installed between the spacers;

[0038] like Figure 8 As shown, in the first state: when the large seeding wheel and the small seeding wheel need to rotate synchronously, the pull shaft is pulled axially, and the guide ball enters the annular groove from the cavity formed by the first half cavity and the second half cavity, cutting off the power between the large seeding wheel and the spacer. The push rod moves and is placed in the limiting groove. The rotational power of the pull shaft is transmitted to the small seeding wheel through the set screw and to the large seeding wheel through the push rod, driving the large seeding wheel and the small seeding wheel to rotate synchronously.

[0039] like Figure 9 As shown, in the second state: the small seeding wheel needs to rotate independently, and the large seeding wheel is locked with the spacer sleeve. The pull shaft is pushed in the opposite direction, and the guide ball rises under the guidance of the guide groove and enters the cavity formed by the first half cavity and the second half cavity. At this time, the small seeding wheel and the spacer sleeve are locked together, the push rod moves to be placed outside the limit groove, and the rotational force of the pull shaft is transmitted to the small seeding wheel only through the set screw.

[0040] In summary, this invention achieves the function of clutch engagement, which allows for the independent rotation of the small seeding wheel or the synchronous rotation of the large and small seeding wheels.

[0041] like Figure 2 , 4 As shown, in order to illustrate the specific structure of the first half-cavity and the second half-cavity, the present invention adopts the first half-cavity 31 and the second half-cavity 11 as semi-cylindrical holes; the inner diameter of the cavity formed by the first half-cavity 31 and the second half-cavity 11 is smaller than the diameter of the guide ball 5;

[0042] The cavity has a cylindrical blind hole structure, which facilitates the entry of the guide ball.

[0043] like Figure 4 As shown, in order to illustrate the specific structure of the annular groove, the present invention adopts the outline of the annular groove 32 as a first 1 / 4 spherical annular groove.

[0044] like Figure 8 , 9 As shown, in order to illustrate the specific structure of the guide groove, the outline of the guide groove 21 in this invention includes: the second 1 / 4 spherical annular groove 25 and the first 1 / 4 spherical annular groove form a semi-circular structure; along the axial direction of the pull shaft 2, the guide inclined surface 26 forms a gradually expanding structure for the pull shaft 2;

[0045] The second 1 / 4 ball annular groove and the first 1 / 4 ball annular groove form a semi-circular structure. When the guide ball is placed in the semi-circular structure, the guide ball does not interfere with the large seeding wheel, and the large seeding wheel can rotate freely.

[0046] As the guide ball rises under the guidance of the guide slope, it enters the cavity and locks the large seeding wheel and the spacer sleeve together.

[0047] like Figure 5 As shown, in order to illustrate the specific structure of the limiting groove, the present invention uses multiple ribs 34 on the other side of the large seeding wheel 3, and a limiting groove 33 is formed between two adjacent ribs 34.

[0048] The reinforcing bars are arranged radially along the side of the large seeding wheel, so that when the limiting rod abuts against the reinforcing bars, it is in line contact, which facilitates the following rotation of the large seeding wheel.

[0049] like Figure 10 As shown, in order to illustrate the specific setting method of the set screw, the present invention uses the set screw 23 to pass obliquely through the small seeding wheel 4, and its bottom is slidably connected to the slide groove 24 through a limiting member (not shown in the figure);

[0050] The set screw passes obliquely through the small seeding wheel, which shortens the overall length of the set screw. When the pull shaft moves axially, the position of the set screw relative to the small seeding wheel does not change. Through the cooperation of the limiting part and the slide groove, the set screw slides relative to the bottom, so that the rotational force of the pull rod can always be transmitted to the small seeding wheel through the set screw.

[0051] After the steel ball 5 is confined within the cavity, when the pull shaft moves axially, the steel ball will fall under the action of gravity and magnetic force, realizing the separation of the large seed wheel 3 from the spacer 1 and allowing it to rotate freely. The magnetic guide ball 5 can move under the action of magnetic force and gravity, preventing the guide ball 5 from getting stuck.

[0052] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A feed dispensing clutch mechanism for a seeder, characterized in that, include: Multiple spacers arranged coaxially; A pull shaft passes through the central hole of one of the spacers; The large seeding wheel and the small seeding wheel are sleeved on the pull shaft and located between the two spacers; The first half-cavity is formed on one side of the large seeding wheel, and the first half-cavity is provided radially outward from the central hole of the large seeding wheel. The second half cavity is formed on one side of the spacer, and the spacer's central hole extends radially outward to form the second half cavity; An annular groove is formed at the center hole of the large seeding wheel and is located on the side of the first semi-cavity. A guide groove is formed at the pull shaft, and a guide ball is provided in the guide groove; A limiting groove is provided on the other side of the large seeding wheel; The push rod is radially fixed to the outer wall of the pull shaft; A set screw passes through the small seeding wheel, and its bottom is slidably connected to a groove formed on the surface of the pull shaft; When the pull shaft is pulled axially, the guide ball enters the annular groove from the cavity formed by the first half-cavity and the second half-cavity, cutting off the power between the large seeding wheel and the spacer. The push rod moves and is placed in the limiting groove. The rotational power of the pull shaft is transmitted to the small seeding wheel through the set screw and to the large seeding wheel through the push rod, driving the large seeding wheel and the small seeding wheel to rotate synchronously.

2. The seeder feeding clutch mechanism according to claim 1, characterized in that, Both the first and second semi-cavities are semi-cylindrical holes; The inner diameter of the cavity formed by the first half-cavity and the second half-cavity is smaller than the diameter of the guide ball.

3. The seeder feeding clutch mechanism according to claim 1, characterized in that, The outline of the annular groove is a first 1 / 4 spherical annular groove.

4. The seeder feeding clutch mechanism according to claim 3, characterized in that, The outline of the guide groove includes: The second 1 / 4 spherical annular groove, together with the first 1 / 4 spherical annular groove, forms a semi-circular structure; A guide ramp, along the axial direction of the pull shaft, forms a gradually expanding structure for the pull shaft.

5. The seeder feeding clutch mechanism according to claim 1, characterized in that, The other side of the large seeding wheel is provided with multiple ribs, and a limiting groove is formed between two adjacent ribs.

6. The seeder feeding clutch mechanism according to claim 1, characterized in that, The set screw passes obliquely through the small seeding wheel, and its bottom is slidably connected to the groove through a limiting member.

7. The seeder feeding clutch mechanism according to claim 1, characterized in that, The guide ball is magnetic.

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