CN110679248A - A kind of flexible adjustment seed cleaning device suitable for pneumatic roller type seed metering device - Google Patents

Abstract

The utility model relates to a flexible adjusting seed clearing device suitable for a pneumatic roller type seed metering device, belonging to the technical field of agricultural machinery, comprising a seed clearing unit, a seed clearing adjustment mechanism and a support frame. The equidistant arrangement is used to fix the adjustment shaft of the seed cleaning adjustment mechanism through positioning pins. Each group of seed cleaning units is composed of three-wing seed cleaning knives, two-wing seed cleaning knives and compression springs, and the compression springs are arranged on the three-wing seed cleaning knives. Between the knife and the two-wing seed cleaning knife; the seed cleaning adjustment mechanism includes an adjustment shaft, a gear pair and a handle, and both ends of the adjustment shaft are fixed on the support frame through a retaining ring; the gear pair is composed of two intermeshing gears, one of which is fixed. At the shaft end of the adjustment shaft, another gear is fixedly connected with the handle; the support frame is fixed on the seed metering device by bolts; the invention can quickly and conveniently adjust the relative position of the seed cleaning knife and the seed metering hole on the seed metering roller, and remove the The excess seeds outside the seed metering hole ensure the seed metering quality of the seed metering device.

Description

A kind of flexible adjustment seed cleaning device suitable for pneumatic roller type seed metering device

technical field

The invention belongs to the technical field of agricultural machinery, and in particular relates to a flexible adjustment seed clearing device suitable for a pneumatic roller type seed metering device.

Background technique

The mechanized precision seeding technology refers to the mechanized planting technology that reduces the seeding amount, improves the seeding quality, and enables the seeds to have precise sowing depth, row spacing and plant spacing in the field. There are many factors affecting precision seeding, among which the seeding performance of the seed metering device is one of the keys. The precision seed metering device is mainly divided into two types: mechanical type and pneumatic type. Mechanical type is divided into horizontal disc type, socket type, vertical spoon wheel type and finger clip type. and air pressure. Compared with the mechanical type, the pneumatic type has the characteristics of strong seed adaptability, low breakage rate, simple structure, and suitability for high-speed operation, and has attracted more and more attention. With the advancement of domestic land circulation and the requirements of refined agronomic operations, pneumatic precision seeders suitable for high-speed operations will become the mainstream of the market.

As a key component of the seed metering device, the seed clearing device directly affects three important parameters of its operation speed, single seed rate and seed leakage rate. It is required that the method of clearing seeds is reasonable, the force is even and moderate, and the damage to the seeds is small, so as to ensure the high single-grain rate and low seed leakage rate of the seed metering device. At present, the commonly used types of seed clearing knives for seed metering devices include single-sided seed clearing, double-sided seed clearing, and multi-level seed clearing, so as to ensure a high single-grain rate of the seed metering device. The rigid connection method is generally adopted in the adjustment form of seed cleaning, which leads to a large impact between the cutting edge of the seed cleaning knife and the seeds during high-speed operation, which is not conducive to protecting the seeds, and it is very inconvenient to adjust during multi-stage seed cleaning.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, and propose a flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device, which can quickly and easily adjust the seed cleaning knife and the seed metering on the seed metering roller. The relative position of the hole, remove the excess seeds outside the seeding hole, and ensure the seeding quality of the seed metering device.

The purpose of the present invention is to achieve through the following scheme: a kind of flexible adjustment seed clearing device suitable for pneumatic roller type seed metering device, is characterized in that, comprises: seed clearing unit, seed clearing adjustment mechanism and support frame,

The number of the seed cleaning units is at least two groups, and each group of seed cleaning units is arranged at equal intervals on the adjustment shaft of the seed cleaning adjustment mechanism through positioning pins. The knife and the compression spring are formed, and the compression spring is arranged between the three-wing clearing knife and the two-wing clearing knife;

The seed cleaning adjustment mechanism includes an adjustment shaft, a gear pair and a handle. Both ends of the adjustment shaft are fixed on the support frame through retaining rings; the gear pair is composed of two gears that mesh with each other, one of which is fixed at the shaft end of the adjustment shaft, and the other is fixed at the shaft end of the adjustment shaft. A gear is fixedly connected to the handle;

The support frame is fixed on the pneumatic roller type seed metering device by bolts.

Further, the three-wing seed cleaning knife adopts an integrated symmetrical structure. The main body of the three-wing seed cleaning knife is provided with three fins. The free end of the sheet is in the shape of an arc, which is in contact with the outer wall of the roller of the seed metering device. The roots of the fins on both sides are provided with a shaft tube for the adjustment shaft to pass through. The other end of the shaft tube is in contact with the positioning pin, and the end is the end surface of the spiral groove.

Further, two fins are symmetrically arranged on both sides of the center line of the main body of the two-wing seed cleaning knife, the two fins are arranged inwardly inclined, and the free ends of the two fins are in the shape of an arc, which is in line with the seed metering device. The outer walls of the rollers are in contact, and the roots of the two fins are provided with a shaft tube for the adjustment shaft to pass through. Pin contact, this end is a helical groove end face.

Further, the positioning pins are elastic cylindrical pins.

Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the present invention proposes a flexible adjustment seed clearing device suitable for a pneumatic roller type seed metering device. The handle can quickly adjust the reasonable spacing of the two seed cleaning knives in the same seed cleaning unit, so as to flexibly clean the excess seeds outside the seed metering holes on the seed metering roller, and ensure the single seed rate of the precision seeder. The seed cleaning device proposed by the invention has the characteristics of simple structure, convenient adjustment and reliable use.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to understand the present invention and do not constitute improper limitations of the present invention. In the accompanying drawings:

FIG. 1 is a schematic diagram of the overall structure of a flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device proposed by the present invention.

FIG. 2 is a schematic structural diagram of a seed cleaning unit in the present invention.

FIG. 3 is a schematic structural diagram of an adjustment shaft in the present invention.

FIG. 4 is a front view of the support frame in the present invention.

FIG. 5 is a front view of the three-wing seed cleaning knife in the present invention.

FIG. 6 is a top view of the three-wing seed cleaning knife in the present invention.

FIG. 7 is a front view of the two-wing seed cleaning knife in the present invention.

FIG. 8 is a top view of the two-wing seed cleaning knife in the present invention.

The marks in the figure are as follows: 1- three-wing seed cleaning knife, 2- two-wing seed cleaning knife, 3- locating pin, 4- compression spring, 5- adjusting shaft, 6- gear pair, 7- handle, 8- support frame .

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. It should be understood by those skilled in the art. The content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figures 1 to 8, a flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device includes a seed cleaning unit, a seed cleaning adjustment mechanism and a support frame 8.

The number of the seed clearing units is at least two groups, which can be set according to the number of rows of different seed metering rollers. In this example, eight groups are used. On the adjustment shaft 5 of the adjustment mechanism, each group of seed cleaning units is composed of a three-wing seed cleaning knife 1, a two-wing seed cleaning knife 2 and a compression spring 4, and the compression spring 4 is arranged on the three-wing seed cleaning knife 1 and the two-wing seed cleaning knife. between knives 2;

The seed cleaning adjustment mechanism includes an adjustment shaft 5, a gear pair 6 and a handle 7. Both ends of the adjustment shaft 5 are fixed on the support frame 8 through retaining rings; the gear pair 6 is composed of two mutually meshing gears, one of which is fixed in the adjustment On the shaft end of the shaft 5, another gear is fixedly connected with the handle 7;

The support frame 8 is fixed on the pneumatic roller type seed metering device by bolts.

Among them, the positioning pin 3 is an elastic cylindrical pin.

Among them, the three-wing seed cleaning knife 1 adopts an integrated symmetrical structure. The main body of the three-wing seed cleaning knife 1 is provided with three fins. The free end of the sheet is in the shape of a circular arc, which is in contact with the outer wall of the roller of the seed metering device. The roots of the fins on both sides are provided with a shaft tube for the adjustment shaft 5 to pass through, and one end of the shaft tube is used for the compression spring 4. On it, this end is a flat end face, and the other end of the shaft tube is in contact with the positioning pin 3, and this end is an end face of a spiral groove.

Among them, two fins are symmetrically arranged on both sides of the center line of the main body of the two-fin seed cleaning knife 2, and the two fins are arranged inclined inwardly. The outer wall of the cylinder is in contact, and the roots of the two fins are provided with a shaft tube for the adjustment shaft 5 to pass through. One end of the shaft tube is for the compression spring 4 to be sleeved on it. The positioning pin 3 is in contact, and this end is the end face of the spiral groove.

The working principle of the present invention is as follows: the handle 7 rotates the gear connected to the gear pair 6, the gear meshing drives the adjustment shaft 5 to rotate, the adjustment shaft 5 drives the positioning pin 3 to rotate with it, and the positioning pin 3 slides into the spiral of the shaft tube. In the groove, through the action of the compression spring 4 between the two seed cleaning knives, the distance between the three-wing seed cleaning knife 1 and the two-wing seed cleaning knife 2 is changed, so as to achieve the purpose of removing excess seeds in the seed suction area of the seed metering roller, ensuring that The seeding quality of the seed meter.

Claims (4)

1. a kind of flexible adjustment seed clearing device that is applicable to pneumatic roller type seed metering device, is characterized in that, comprises: clear seed unit, clear seed adjustment mechanism and support frame, The number of the seed cleaning units is at least two groups, and each group of seed cleaning units is arranged at equal intervals on the adjustment shaft of the seed cleaning adjustment mechanism through positioning pins. The knife and the compression spring are formed, and the compression spring is arranged between the three-wing clearing knife and the two-wing clearing knife; The seed cleaning adjustment mechanism includes an adjustment shaft, a gear pair and a handle. Both ends of the adjustment shaft are fixed on the support frame through retaining rings; the gear pair is composed of two gears that mesh with each other, one of which is fixed at the shaft end of the adjustment shaft, and the other is fixed at the shaft end of the adjustment shaft. A gear is fixedly connected to the handle; The support frame is fixed on the pneumatic roller type seed metering device by bolts. 2. The flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device according to claim 1, characterized in that: the three-wing seed cleaning knife adopts an integrated symmetrical structure, and the main body of the three-wing seed cleaning knife There are three fins, the fins on both sides are symmetrically arranged, and they are inclined to the fin located in the middle. The root of the fin is provided with a shaft tube for the adjustment shaft to pass through, one end of the shaft tube is sleeved on it by the compression spring, this end is a flat end face, the other end of the shaft tube is in contact with the positioning pin, and this end is a spiral groove end face. 3. The flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device according to claim 1, characterized in that: two fins are symmetrically arranged on both sides of the center line of the main body of the two-fin seed cleaning knife, The two fins are arranged inclined inwardly, and the free ends of the two fins are in the shape of arcs, which are in contact with the outer wall of the roller of the seed metering device. , one end of the shaft tube is sleeved on it by the compression spring, the end is a flat end face, the other end of the shaft tube is in contact with the positioning pin, and the end is a spiral groove end face. 4 . The flexible adjustment seed cleaning device suitable for a pneumatic roller type seed metering device according to any one of claims 1 to 3 , wherein the positioning pin is an elastic cylindrical pin. 5 .

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