Grain lifting device of corn harvester for harvesting lodging corn

Abstract

A balancing weight is welded to a circular iron ring at the tail end of a second-stage grain lifting finger, the first-stage grain lifting finger and the second-stage grain lifting finger are connected through a bolt, the first-stage grain lifting finger is provided with an open hole to guarantee free movement of the circular iron ring, the second-stage grain lifting finger is installed on a grain lifting wheel, and the circular iron ring is connected with the second-stage grain lifting finger through a bolt. The grain lifting wheel is welded to the center shaft through the supporting rod and fixed to the front of the header of the corn harvester through the mounting frames on the two sides of the center shaft, and the device can lift up lodging corn straw on the left side and the right side, so that the harvesting efficiency of the corn header on lodging corn is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a corn harvester to harvest the down corn. BACKGROUND

[0002] As a widely planted food, feed and industrial raw material crop in the world, corn occupies a core position in agricultural production and national economy.

[0003] At present, many varieties of corn lack the ability to resist lodging, and when encountering disasters such as strong winds and heavy rains, lodging is prone to occur. At this time, the lodging has little effect on corn yield, but the plants are randomly distributed on the ground, causing the ear position to be lower than the effective ear picking height of the header, so that the corn harvester header cannot complete the ear picking action, resulting in a large number of ears remaining at the bottom of the header, increasing the process loss rate of corn harvesting. The existing technology is obviously inconvenient and defective in actual use, and it is difficult to realize efficient harvesting of down corn. Therefore, a down corn harvesting device is invented to solve the technical problem of low harvesting loss rate of down corn. SUMMARY

[0004] The purpose of the present application is to provide a down corn harvesting device for a corn harvester, which improves the harvesting efficiency of down corn and solves the technical problems of poor down corn supporting effect and high harvesting loss rate of the existing corn harvester.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a down corn harvesting device for a corn harvester, comprising a central shaft, a primary supporting finger, a secondary supporting finger, a counterweight, a mounting bracket, a support rod, a bearing, a gear, a supporting wheel and a circular iron ring; characterized in that: the primary supporting finger and the secondary supporting finger are connected by a hinge, allowing the secondary supporting finger to rotate flexibly relative to the primary supporting finger; a through hole is formed in the end of the primary supporting finger close to the secondary supporting finger, and a circular iron ring is fixed to the end of the secondary supporting finger, which is arranged in the through hole to ensure that the secondary supporting finger does not interfere during rotation.

[0006] One end of the primary supporting finger away from the secondary supporting finger is welded and fixed to the wheel body of the supporting wheel, and the supporting wheel is assembled on the support rod group; the support rod group is composed of four support rods uniformly distributed around the central shaft, and the primary supporting finger and the support rod are arranged at an angle (they are not collinear).

[0007] The support rod group is fixedly installed along the axial direction of the central shaft, and the number of support rod groups corresponds to the number of corn headers.

[0008] The end of the secondary straw supporting finger is welded with a circular iron ring, the counterweight is welded on the circular iron ring, and the included angle between the counterweight and the secondary straw supporting finger in the clockwise direction is 90-120 degrees; the counterweight structure designed based on the angle can realize self-adaptive posture adjustment of the secondary straw supporting finger; when the secondary straw supporting finger rotates to the working position close to the ground, the posture parallel to the ground can be kept, so that the low-laying straw can be effectively supported; when the secondary straw supporting finger rotates to the position far from the ground, the secondary straw supporting finger rotates clockwise around the hinge under the gravity of the counterweight until the secondary straw supporting finger abuts against the straw supporting wheel body, and the end of the secondary straw supporting finger is prevented from colliding with the straw divider at the front end of the straw cutting platform.

[0009] The center shaft is rotatably installed on the mounting frame through a bearing, and a gear is fixedly assembled on one side of the center shaft, which is drivingly connected with the power system of the corn harvester, so that the whole straw supporting mechanism is driven to rotate synchronously.

[0010] The beneficial effects of the present application are as follows:

[0011] By means of the lifting device, the secondary straw supporting finger at a high position from the ground can be automatically rotated and abutted against the straw supporting wheel under the gravity of the counterweight, so that the end of the secondary straw supporting finger is prevented from colliding with the straw divider, the wear and failure probability of the components are reduced, and the ordinary corn harvester can be quickly adapted without large-scale modification of the harvester.

[0012] By means of the lifting device, the secondary straw supporting finger close to the ground can keep a posture parallel to the ground, so that the low-laying corn straw can be supported, the problem of incomplete lifting or missing of the straw is avoided, the harvesting efficiency of the ordinary corn harvester for the laying corn is improved, and the harvesting loss rate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic view of a straw supporting device structure of a corn harvester for harvesting laying corn;

[0014] Figure 2 is Figure 1 a side view of the device;

[0015] Figure 3 is a connection detail of the primary straw supporting finger and the secondary straw supporting finger.

[0016] In the figure: 1, secondary straw supporting finger; 2, bearing; 3, circular iron ring; 4, mounting frame; 5, counterweight; 6, center shaft; 7, supporting rod; 8, straw supporting wheel; 9, gear; 10, primary straw supporting finger. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, objects and effects of the present application, further description will be made with reference to the drawings: as shown inFigure 1 As shown, the gear 9 is installed on one side of the central shaft 6, the central shaft 6 is installed on the mounting frame 4 through the bearing 2, the support rod 7 is welded on the central shaft 6, the straw wheel 8 is installed on the support rod 7, the first straw pointer 10 is welded on the straw wheel 8, the second straw pointer 1 is connected with the first straw pointer 10 through a hinge, and the counterweight 5 is welded on the circular iron ring 3 at the end of the second straw pointer 1.

[0018] Working principle: when the harvester is working, the power is transmitted to the central shaft 6 through the gear 9, driving the central shaft 6 to rotate clockwise; the central shaft 6 synchronously drives the support rod 7 welded on the periphery to rotate, and then drives the straw wheel 8 installed on the support rod 7 and the first straw pointer 10 welded on the straw wheel 8 to rotate clockwise synchronously. When the first straw pointer 10 rotates to the position close to the ground, the second straw pointer 1 hinged with the first straw pointer 10 freely rotates under the joint action of its own gravity and the gravity of the counterweight 5 at the end, and the included angle with the ground gradually decreases until it is adjusted to the attitude parallel to the ground. With the forward movement of the corn harvester, the second straw pointer 1 maintaining the attitude parallel to the ground moves to the lower part of the lodged corn straw; with the continuous rotation of the central shaft 6, the first straw pointer 10 drives the second straw pointer 1 to continue to rotate, and the second straw pointer 1 is blocked by the resistance of the straw after contacting with the lodged corn straw. The second straw pointer 1 stops maintaining the attitude parallel to the ground, and its included angle with the ground gradually increases under the joint action of the rotation driving force of the first straw pointer 10 and the resistance of the straw; when the second straw pointer 1 rotates to the connecting hole of the first straw pointer 10, it is limited and blocked by the connecting hole, reaching the maximum opening angle relative to the first straw pointer 10. The second straw pointer 1 continues to rotate with the central shaft 6 at the maximum angle, gradually lifting the lodged corn straw upward.

[0019] When the second straw pointer 1 completes the lifting action of the corn straw, it continues to rotate with the central shaft 6 at the maximum angle relative to the first straw pointer 10; when the first straw pointer 10 rotates to the area close to the cutting table of the corn harvester, the second straw pointer 1 rotates clockwise under the action of its own gravity and the gravity of the counterweight 5 at the end, and returns to the position abutting against the straw wheel 8. The reset attitude can ensure that the second straw pointer 1 does not collide with the corn cutting table in the subsequent rotation process, until it completes a whole circle rotation with the straw wheel 8 and enters the next round of straw lifting cycle.

Claims

1. A corn harvester for harvesting downed corn, comprising a central shaft, a primary lifting finger, a secondary lifting finger, a counterweight, a mounting bracket, a support rod, a circular iron ring, a lifting wheel, a bearing; characterized in that: The counterweight is welded on the circular iron ring at the end of the secondary supporting finger, the primary supporting finger and the secondary supporting finger are connected through a hinge, the upper end of the primary supporting finger is provided with a through hole for the circular iron ring to pass through, the primary supporting finger is installed on the supporting wheel, and the supporting wheel is installed on the central shaft through the supporting rod.

2. The snapper device for a corn harvester to harvest downed corn according to claim 1, wherein: The included angle between the counterweight and the axis of the secondary supporting finger in the clockwise direction is 90°<α<120°.

3. The snapper device for a corn harvester to harvest downed corn according to claim 1, wherein: The secondary supporting finger is made of a rigid circular tube, and the front end of the secondary supporting finger is polished to form a smooth transition surface.

4. The snapper device for a corn harvester to harvest downed corn according to claim 1, wherein: The supporting rods are uniformly welded around the central shaft, the supporting wheels are installed on the supporting rods, the number of the primary supporting fingers is 4, and the primary supporting fingers are uniformly distributed around the supporting wheels, the primary supporting fingers are arranged at an included angle with the supporting rods in the supporting wheels, and the number of the supporting wheels is consistent with the number of the straw dividers of the harvester header.

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