CN102612902A - Seed-coat-removal preventing device for air-blowing type seeding apparatus - Google Patents

Abstract

The invention relates to the technical field of agricultural machinery, in particular to an anti-knocking device for an air-blowing precision seed metering device. The anti-knocking device of the air-blown precision seed metering device includes a seeding disc (5) with interconnected seed pushing grooves (502) and type holes (501). It also includes an anti-knocking seed pushing sheet, the anti-knocking seed pushing sheet has a seed pushing part located in the seed pushing groove (502) of the seeding tray (5); the anti-knocking seed pushing sheet is connected with the control mechanism , driven by the control mechanism, the seed pushing part enters or leaves the hole (501) of the seed tray (5). In the present invention, an anti-knocking seed pushing sheet is installed at the junction of the seed filling area and the seed clearing area, which solves the problem of knocking seeds when the seed metering device is rotated normally without or with insufficient air force.

Description

Anti-knocking device for air blowing seed meter

technical field

The invention relates to the technical field of agricultural machinery, in particular to an anti-knocking device for an air-blowing precision seed metering device.

Background technique

As a pneumatic precision seed metering device, the air-blowing seed metering device has been widely used abroad, and it is also in the stage of popularization and application in China. Single-seed sowing is realized by using the principle of air-flow seed clearing, and the requirements for the shape and size of the seeds are not strict. It is especially suitable for the sowing of non-circular seeds such as corn with large variations in size and shape. Due to its better filling performance, it has strong adaptability to high-speed operation and high productivity. At the same time, it is also highly adaptable to wind pressure fluctuations, sows evenly, and is more convenient to use and adjust. It is a precision seed metering device with good prospects for popularization and application.

Because its working principle is: the cone-shaped hole of the seed meter is filled with seeds in the seed-filling area, and the excess seeds are blown out by the high-pressure airflow when passing through the bottom of the air nozzle, leaving only one seed at the bottom of the cone hole, and then enters the protective seed area. Therefore, if there is no air flow, the hole will be full of seeds, and the top layer of seeds will be partially higher than the surface of the hole. When the type hole in this state is transferred to the seed protection area, the seeds protruding from the surface of the type hole will collide with the seed meter housing. If it is mild, it will cause the seeds to be broken, and if it is severe, it will cause the seed meter to be stuck and cannot work normally. In field operations, it is generally required that the seeder must not advance or artificially rotate the ground wheel and the seeding disc when the fan does not reach the working speed. However, in actual work, because tractor drivers are used to using mechanical seeders, they do not have a strong awareness of following the operating procedures for using pneumatic seeders, and the fan often starts to work without starting or just starting the fan. At the same time, in the process of adjusting the amount of fertilizer discharge at the head of the field, adjusting the complete machine, shutting down for maintenance, etc., it is inevitable that the situation that the ground wheel or the seeding disc needs to be rotated does not occur. Therefore, it is very necessary to solve the problem of knocking seeds that occurs when the seeding disc rotates without air force.

At the end of the seed protection area, the air-blown seed metering device generally needs to use a circular or arc-shaped seed metering piece to extend into the seed pushing groove of the seed metering tray to force the seeds in the hole to be pushed out, and finally the seeds are released from the seed metering The mouth falls to achieve single seed sowing. The seed pushing sheet can effectively prevent the phenomenon that the hole cannot store seeds normally due to the occurrence of small seeds or broken seeds stuck in the hole. The present invention applies the principle of pushing seeds to the problem of preventing knocking of seeds.

Contents of the invention

The object of the present invention is to provide an anti-knocking device for an air-blowing precision seed meter that prevents seed knocking when the seed meter is rotated when there is no air force or the air force is insufficient to make the seed meter work normally.

In order to achieve the above object, the present invention provides the following technical solutions:

An anti-knocking device for an air-blown seed metering device, comprising a seeding disc 5 with interconnected seed pushing grooves 502 and holes 501, the anti-knocking device for the air-blown seed metering device also includes an anti-knocking seed Seed pushing sheet, the anti-knocking seed pushing sheet has a pushing part located in the pushing groove 502 of the seeding tray 5; the anti-knocking seed pushing sheet is connected with the control mechanism, driven by the control mechanism , the pushing part enters or leaves the hole 501 of the seed tray 5 .

The anti-knocking seed pushing sheet is a circular anti-knocking seed pushing sheet 3, the pushing part is the pushing ear 301 distributed around its circumference, and the control mechanism is a needle cylinder 12; the needle cylinder 12 The air pipe 10 communicates with the air inlet 1 of the air-blown seed meter.

The anti-knocking seed pushing piece is a circular anti-knocking kind pushing piece 3, and the described pushing part is the pushing ear 301 distributed around its circumference, and the control mechanism is the pushing arm 16 of the kind pushing piece; The anti-knocking seed pusher 3 is hinged on one end of the pusher arm 16, and the other end of the pusher arm 16 is hinged on the lower housing 4 of the seed meter; the torsion spring 17 is clamped between the pusher arm 16 and the torsion spring Between the limiting sleeves 18 ; one end of the pusher arm 16 abuts against the arm limiting sleeve 15 ; the arm limiting sleeve 15 is adjustably fixed in the adjusting hole 14 .

The anti-knocking seed pushing piece is an arc-shaped anti-knocking kind pushing piece 8, and the described pushing part is a kind pushing arc 801, and the control mechanism is a position adjusting nut 9; one end of the anti-knocking kind pushing piece 8 is movable It is connected to the upper housing 20 of the seed metering device, and the other end is adjustably connected to the oblong hole of the upper housing 20 of the seed metering device through a position adjusting nut 9 .

Compared with prior art, the beneficial effect of the present invention is:

1. The anti-knocking device of the present invention uses the working principle of the pusher sheet combined with the air-blown seed metering device to achieve the purpose of avoiding seed knocking, without affecting the normal seed cleaning process and the working performance of the seed metering device;

2. Use the needle cylinder to control whether the anti-knocking device is in the working position with the help of the existing air source, which is not only simple but also effective in real time;

3. The form of the anti-knock device can be selected according to the actual situation and needs, which is flexible and diverse;

4. Simple structure and easy installation.

Description of drawings

Fig. 1 is a front sectional view of the overall structure of Embodiment 1 of the anti-knocking device of the air-blown seed metering device of the present invention;

Fig. 2 is a right sectional view of the overall structure of the first embodiment of the anti-knocking device of the air-blown seed metering device of the present invention;

Fig. 3 is the retracted state diagram (working state) of the cylinder of Embodiment 1 of the present invention;

Fig. 4 is the extended state figure (non-working state) of the cylinder of Embodiment 1 of the present invention;

5 is a perspective view of a working state of Embodiment 2 of the present invention;

6 is a perspective view of a non-working state of Embodiment 2 of the present invention;

FIG. 7 is a working state diagram of Embodiment 3 of the present invention;

Fig. 8 is a schematic diagram of the installation position of the anti-knocking seed pushing sheet in the upper housing in Fig. 7;

FIG. 9 is a non-working state diagram of Embodiment 3 of the present invention;

Fig. 10 is a schematic diagram of the installation position of the anti-knocking seed pushing sheet in Fig. 9 on the upper casing.

[Description of main component symbols]

I Seed charging area 801 Seed pushing arc

II Seed Clearing Area 9 Position Adjustment Nut

III Seed Protection Area 10 Trachea

1 Air intake port 11 Cylinder fixing frame

2 Air Nozzles 12 Needle Cylinders

3 round anti-knock seed push piece 1201 cylinder extension rod

301 Pushing lugs 13 Cylinder action point connecting frame

4 Seed Meter Lower Housing 14 Adjustment Hole

5 Seed tray 15 Arm limit sleeve

501 type hole 16 seed pushing arm

502 Seed pushing groove 17 Torsion spring

6 Circular seed pushing piece 18 Torsion spring limit sleeve

7 Seed discharge port 19 Position adjusting bolt of arm limit sleeve

8 Arc-shaped anti-knock seed push piece 20 Upper shell of seed meter

Detailed ways

The present invention will be further described below according to accompanying drawing.

The anti-knocking device of the air-blowing seed metering device of the present invention includes an anti-knocking seed pushing sheet, and the anti-knocking seed pushing sheet is connected to the seed metering device through a control mechanism.

The seed disk is divided into three areas on the circumference: seed filling area I, seed clearing area II and seed protection area III. The seed filling area I is the area where the type hole 501 is filled with seeds, the seed clearing area II is the area where the airflow below the air nozzle 2 acts, and the seed protection area III is the area of the seed tray wrapped by the housing (that is, the seed tray 5 and the row The overlapping area of the lower housing 20 of the seed device).

The anti-knocking device is installed at a certain position in front of the seed cleaning area II, and the pushing groove 502 is connected with the type hole 501. In the working state, the pushing part of the anti-knocking seed pushing sheet is located in the pushing concave of the seeding tray. In the groove 502, the seeds filled in the type hole 501 can be pushed out from the bottom of the type hole 501. When the type hole 501 turns over this position, the pushing part of the anti-knocking seed pushing piece will no longer push the seed. When the remaining seeds will be redistributed in the type hole 501, the type hole 501 will not be filled and higher than the surface of the type hole 501, thus avoiding the problem of the seed in the type hole 501 being higher than the type hole 501 surface. The problem of knocking seeds when entering the seed protection area III.

Considering the seed filling performance under high-speed working conditions, the anti-knocking seed pushing sheet may reduce the seed filling rate, so the control mechanism can control whether it is in the working state.

Implementation mode one:

As shown in Fig. 1 and Fig. 2, it is a front sectional view and a right sectional view of the overall structure of the anti-knocking device of Embodiment 1. Wherein, the anti-knocking seed pushing sheet is a circular anti-knocking seed pushing sheet 3 with pushing ears 301 distributed on the circumference, and the pushing part is the pushing ears 301.

The control mechanism is a needle-type cylinder 12, which is fixed on the lower casing 4 of the seed meter by a cylinder fixing frame 11 through bolts, and the cylinder action point connecting frame 13 extends the cylinder of the needle-type cylinder 12 to a rod 1201 It is connected with the round anti-knocking seed pushing piece 3 to realize the linkage between the needle-shaped cylinder 12 and the circular anti-knocking seed pushing piece 3; The air inlet 1 is connected.

The anti-knocking device is installed at a certain position before the seed clearing area II. During the working state, as shown in FIG. In the retracted state, the seed pushing ear 301 of the circular anti-knocking seed pushing piece 3 is located in the seed pushing groove 502 of the seeding tray 5, and just extends into a hole 501 of the seeding tray 5, and the filling type Part of the seeds in the hole 501 are pushed out from the bottom of the hole 501. Since the depth of the pushing ear 301 into the hole 501 is limited, only the topmost seeds of the hole 501 can be pushed out. The junction of zone II and seed-filling zone I; after the hole 501 on the seeding disc 5 has turned over this position, the seed-pushing ear 301 of the circular anti-knocking seed pushing piece 3 no longer extends into the hole 501 Introduce kind, now the remaining seeds are redistributed in the type hole 501, and the type hole 501 can not be filled, the type hole 501 can enter the seed protection area III smoothly, thus avoiding the problem of filling up in the type hole 501. The knocking that occurs when the seed is higher than the outer surface of the hole 501 and enters the seed protection zone III.

When the fan works normally and outputs the airflow of rated pressure, the air pipe 10 drawn from the air inlet 1 provides the working pressure for the needle cylinder 12, and the needle cylinder 12 stretches out to drive the circular anti-knock seed pusher 3-way seed row When the disc 5 moves in the direction of the center of the circle, any push ear 301 on it will no longer extend into the hole 501, and the circular anti-knock push seed 3 is in a non-working state, as shown in Figure 4, which is the stretching out of the cylinder. State diagram; the filling process is carried out normally, the hole 501 of the seeding tray is filled with seeds in the filling area 1, and the excess seeds are blown out by the high-pressure airflow when passing through the bottom of the air nozzle 2, leaving only a seed at the bottom, and then Enter the nursery area III.

Generally, when working at low speed, due to the good seed filling performance, whether the circular anti-knocking seed pushing sheet 3 is in working condition will not have much influence on the normal operation of the seed tray; performance decline, it is best to adjust the circular anti-knocking seed pushing sheet 3 to make it in a non-working state, so as not to cause the rate of missed seeding to rise.

Implementation mode two:

As shown in FIG. 5 , it is a perspective view of the working state of the anti-knocking device of the second embodiment. Wherein, the anti-knocking seed pushing sheet is a circular anti-knocking seed pushing sheet 3 with pushing ears 301 distributed on the circumference, and the pushing part is the pushing ears 301.

The control mechanism is the pusher arm 16, the circular anti-knocking seed pusher 3 is hinged to one end of the pusher arm 16, and the other end of the pusher arm 16 is hinged to the lower housing 4 of the seed meter. and can rotate around point A; the torsion spring 17 is sandwiched between the seed push arm 16 and the torsion spring limit sleeve 18, and pushes the seed push arm 16 toward the outer edge of the seed tray 5 The arm limit sleeve 15 is fixed by the position adjusting bolt 19 of the arm limit sleeve passing through the adjustment hole 14 on the lower housing 4 of the seed meter. One end of the pusher arm 16 abuts against the limit sleeve 15 of the arm. Loosening the position-adjusting bolt 19 of the arm limit sleeve can change the position of the arm limit sleeve 15 on the adjustment hole 14, that is, the position of the arm limit sleeve 15 in the adjustment hole 14 can be adjusted, thereby limiting Push the position of the seed sheet support arm 16, and then adjust the relative position of the circular anti-knocking seed pushing sheet 3 and the seed tray 5 type hole 501, and determine whether it is in working condition. Fig. 6 is a perspective view of the non-working state of the second embodiment, and the anti-knocking principle of the second embodiment is the same as that of the first embodiment.

Implementation mode three:

As shown in Figure 7, it is a working state diagram of the anti-knocking device of the third embodiment, and Figure 8 is a schematic diagram of the installation position of the anti-knocking seed pushing sheet in Figure 7 on the upper housing, wherein the anti-knocking seed pushing sheet is The arc-shaped anti-knocking seed pushing sheet 8 with the pushing arc sheet 801, the pushing kind part is the kind pushing arc sheet 801.

The control mechanism is a position adjusting nut 9. One end of the arc-shaped anti-knocking seed pushing piece 8 is movably connected to the upper housing 20 of the seed meter through a thread, and the other end is adjustablely connected to the seed meter through the position adjusting nut 9. On the oblong hole of the housing 20, changing the position of the position adjusting nut 9 on the oblong hole of the upper housing 20 of the seed metering device can determine whether the pushing arc 801 of the arc-shaped anti-knocking seed pushing sheet 8 is located in the seeding disk 5 In the push seed groove 502, and then play the push seed effect.

When the arc-shaped anti-knocking seed pushing piece 8 is in working condition, its pushing kind arc piece 801 is located in the pushing kind groove 502 of the seeding disc 5, which can play the role of pushing out part of the seeds in the hole 501 to prevent knocking. This principle is as described in Embodiment 1. Manually adjust the position of the position adjustment nut 9 on the oblong hole of the upper housing 20 of the seed metering device, and change the position of the arc-shaped anti-knocking seed pushing sheet 8, so that it is in a non-working state. Figure 9 shows the non-working state of the third embodiment. State diagram, Fig. 10 is a schematic diagram of the installation position of the anti-knocking seed pushing sheet in Fig. 9 on the upper housing.

Claims (4)

1. an air-sweeping type seeding unit prevents knocking kind of a device; Comprise and have the seed plate (5) that pushes away kind of a groove (502) and type hole (501) that is interconnected; It is characterized in that: said air-sweeping type seeding unit is anti-knocks kind of device and comprises that also anti-knocking kind pushes away kind of a sheet, and said anti-knocking kind pushes away kind of sheet and have kind of the part that pushes away that pushes away kind of a groove (502) that is positioned at seed plate (5); Should anti-knock and kind push away kind of sheet and is connected, under the drive of said controlling organization, saidly push away the type hole (501) that seed plate (5) is perhaps left in kind of part entering with controlling organization.

2. as claimed in claim 1ly anti-knock kind of a device, it is characterized in that: said anti-knocking kind pushes away kind of sheet and kind pushes away kind of a sheet (3) for circular anti-knocking, said push away kind of part for its circle distribution push away kind of an ear (301), said controlling organization is a pin type cylinder (12); Said pin type cylinder (12) is communicated with the air inlet (1) of air-sweeping type seeding unit through tracheae (10).

3. as claimed in claim 1ly anti-knock kind of a device, it is characterized in that: said anti-knocking kind pushes away kind of sheet and kind pushes away kind of a sheet (3) for circular anti-knocking, said push away kind of part for its circle distribution push away kind of an ear (301), said controlling organization is for pushing away kind of a sheet support arm (16); Said circle is anti-knocks and kind pushes away kind of a sheet (3) and be articulated in and push away kind of sheet support arm (16) one ends, pushes away kind of sheet support arm (a 16) other end and is hinged on the seeding unit lower house (4); Torsion spring (17) is sandwiched in and pushes away between kind of sheet support arm (16) and the torsion spring spacing collar (18); Push away kind of sheet support arm (16) one ends and support arm spacing collar (15) against; Support arm spacing collar (15) adjustable ground is fixed in the adjustment hole (14).

4. as claimed in claim 1ly anti-knock kind of a device, it is characterized in that: saidly anti-ly knock that kind to push away kind of sheet be that anti-the knocking of arc kind pushes away kind of a sheet (8), said kind of the part that pushes away is for pushing away kind of an arc sheet (801), and said controlling organization is position adjustments nut (9); Anti-knocking kind pushes away kind of sheet (8) one ends and is movably connected on the seeding unit upper shell (20), and the other end is connected on the slotted hole of seeding unit upper shell (20) through position adjustments nut (9) adjustable ground.

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