CN209659962U - A straw returning machine blade - Google Patents

Abstract

The utility model relates to a straw returning machine blade, comprising a main knife shaft, a knife holder, a knife handle and a blade group, the knife holder is fixedly arranged on the main knife shaft, and the two ends of the knife handle are respectively hinged to the knife holder through a pin shaft and a blade set, and fixed by cotter pins; the blade set includes a straight blade and two curved blades, the curved blades are arranged on both sides of the straight blade, and the front end of the curved blade is provided with an arc-shaped tip, the The curved tip is curved towards the sides away from the straight blade, and the direction of the cutting edge of both the straight blade and the curved blade is towards the working direction. The utility model can reduce the soil-breaking phenomenon of the blades, has good effects of straw crushing and stubble breaking, high field return efficiency, and more convenient replacement of the blades.

Description

A straw returning machine blade

technical field

The utility model relates to a blade of a straw returning machine, which belongs to the field of farming machinery and equipment.

Background technique

Straw returning to the field is one of the important measures to promote circular agriculture in my country at present. It has the advantages of saving a lot of labor for cleaning and transporting straw, saving labor, increasing the organic matter of the soil, and greatly increasing grain production. Soil fertility and pollution reduction are of great benefit, so the quality of straw returning to the field has become the main problem. In addition to the power matched with the field returning machine, most of the field returning machines directly affect the field due to the unreasonable blade design. The degree of straw crushing or the working efficiency of the returning machine. Therefore, the design of the returning machine blade is a very important factor.

The straw returning machine blade is the main working part of the straw returning machine. The shape and parameters of the blade have a great influence on the working quality and power consumption of the returning machine. In order to meet the needs of crushing various crop straws, various types of blades have been developed in China in recent years, which can be roughly classified into three categories:

L-shaped blade, because the part where the blade meets the straw is sharp, but the processing is relatively thin, so the blade wears quickly and the strength is not high; when working in the field, because the blade is processed in an L-shaped shape, if it touches hard objects such as stones It is also easily damaged and the maintenance of the blade is difficult;

Hammer-claw type blade, which is strong, wear-resistant and has a long service life. The cutter has strong adaptability, and has good crushing performance on soft straw of rice and wheat and hard straw such as corn and sorghum. However, due to its large energy storage during rotation, it is often used on large and medium-sized straw returning machines. There are certain limitations in the use and promotion of blades;

The straight blade is welded by three straight blades, one horizontal blade and the sleeve, so when the blade is damaged, the replacement cost is high and the processing is difficult.

In addition, there is still a major problem with traditional knives. They can only chop straw and cannot dig into the soil to break stubble. The land needs to be plowed again before sowing.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a blade of a straw returning machine. The blade of the straw returning machine adopts a three-stage blade structure, which can reduce the phenomenon of cutting the soil of the blade, and the effect of straw crushing and stubble breaking is good. The field efficiency is high, and the replacement of the blade is more convenient.

The technical scheme of the utility model is as follows: a blade of a straw returning machine includes a main knife shaft, a knife holder, a knife handle and a blade group, the knife holder is fixedly arranged on the main knife shaft, and the two ends of the knife handle are respectively connected by pins. The shaft hinges the knife holder and the blade group, and is fixed by cotter pins;

The blade set includes a straight blade and two curved blades, the curved blades are arranged on both sides of the straight blade, the front end of the curved blade is provided with an arc-shaped tip, and the arc-shaped tip faces away from the two sides of the straight blade. The side is curved, and the cutting edges of the straight blade and the curved blade are all facing the working direction; the edge of the straight blade and the curved blade are serrated edge.

Further, the handle is provided with a plurality of pin holes.

Further, the handle is a double-layer structure, so that there is a certain distance between the straight blade and the two curved blades through the handle.

The utility model has the following beneficial effects:

1. The whip structure is good for buffering and reducing the phenomenon of soil beating; compared with the bolt connection, the handle and the knife holder are hinged through the pin shaft, so that the blade has better flexibility. When the knife hits rocks or hard soil Under certain circumstances, compared with the traditional two-section blade set, the three-section blade set is more conducive to reducing the impact of collision on the blade, reducing wear and tear, making the tractor suffer less resistance when moving forward, and avoiding the cutter from beating the soil, thereby reducing the efficiency of returning to the field;

2. It has a better stubble removal effect; the curved structure of the cutter makes the cutter move randomly when it rotates, and the synthetic motion is trochoidal motion, and the section with a higher horizontal division speed is located in the distribution of the five strands of straw. In the area; the knife acts on the stubble of the straw in a "three-section whip" style, and fully cuts and breaks the stubble;

3. It has a stronger chopping and crushing effect; each blade adopts a machete blade. Compared with a straight blade, the machete has a stronger cutting force. The crushing effect is better. The cutting edge part of the knife enters the soil in a tangential form, which helps to reduce resistance and can increase the linear speed at the end of the returning machine blade. The tip of the knife adopts a raised tip, which is the best tip for chopping and chopping, and is not easy to damage. The blade has wavy serrations, which can increase the pressure, making straw crushing and stubble breaking easier, and will not get stuck during operation;

4. Through the design of the pin shaft and cotter pin, the pin shaft can be easily disassembled during maintenance, and only the pin shaft needs to be disassembled to complete the replacement of the damaged blade set and tool handle.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is a side view of the utility model;

The reference signs in the figure represent:

1. Main cutter shaft;

2. Knife holder;

3. Knife handle; 31. Pin hole;

4. Blade group; 41. Straight blade; 42. Curved blade;

5, bearing pin; 51, cotter pin.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1-3, a blade of a straw returning machine includes a main knife shaft 1, a knife holder 2, a knife handle 3 and a blade group 4, the knife holder 2 is fixedly arranged on the main knife shaft 1, and the knife handle 3 The two ends of the knife rest 2 and the blade group 4 are respectively hinged by the pin shaft 5, and fixed by the cotter pin 51;

Described blade group 4 comprises straight blade 41 and two curved blades 42, and described curved blade 42 is arranged on the both sides of straight blade 41, and the front end of described curved blade 42 is provided with arc tip, and described arc tip Curved toward the two sides away from the straight blade 41, the blade directions of the straight blade 41 and the curved blade 42 are all facing the working direction; the edge of the straight blade 41 and the curved blade 42 are serrated edge.

The working principle of the utility model is as follows: the main cutter shaft 1 is fixed on the rotating shaft of the field returning machine, and the main cutter shaft 1 rotates with the rotating shaft of the field returning machine, driving the knife holder 2, the knife handle 3 and the blade group to rotate; through the blade group 4 The saw-toothed edge of the blade cuts and cuts the straw stubble; when encountering hard soil or stones, the blade set 4 and the knife handle 3 will bounce off in time due to the hinged pin 5 to complete the buffer.

The blade of a straw returning machine provided by the utility model has the following beneficial effects:

1. The whip structure is good for buffering and reducing the phenomenon of soil beating; compared with the bolt connection, the handle 3 and the tool holder 2 are hinged through the pin shaft 5, so that the blade has better flexibility. When the tool hits stones or soil In the hard case, compared with the traditional two-section blade set, the three-section blade set is more conducive to reducing the impact of collision on the blade, reducing wear and tear, making the tractor suffer less resistance when moving forward, and avoiding the tool from beating the soil, thus reducing the return to the field. efficiency;

2. It has a better stubble removal effect; the curved structure of the cutter makes the cutter move randomly when it rotates, and the synthetic motion is trochoidal motion, and the section with a higher horizontal division speed is located in the distribution of the five strands of straw. In the area; the knife acts on the stubble of the straw in a "three-section whip" style, and fully cuts and breaks the stubble;

3. It has a stronger chopping and crushing effect; each blade adopts a machete blade. Compared with a straight blade, the machete has a stronger cutting force. The crushing effect is better. The cutting edge part of the knife enters the soil in a tangential form, which helps to reduce resistance and can increase the linear speed at the end of the returning machine blade. The tip of the knife adopts a raised tip, which is the best tip for chopping and chopping, and is not easy to damage. The blade has wavy serrations, which can increase the pressure, making straw crushing and stubble breaking easier, and will not get stuck during operation;

4. Through the design of the pin shaft 5 and the cotter pin 51, the pin shaft 5 can be easily disassembled during maintenance, and only the pin shaft 5 needs to be disassembled to complete the replacement of the damaged blade set 4 and the handle 3.

Further, the handle 3 is provided with a plurality of pin holes 31 .

It can be known from the above description that by providing a plurality of pin holes 31, the length of the knife can be freely adjusted to adapt to different terrains, ensuring the straw crushing effect and reducing the phenomenon of the knife hitting the soil.

Further, the handle 3 is a double-layer structure, so that a certain distance is formed between the straight blade 41 and the two curved blades 42 through the handle 3 .

As can be seen from the above description, through the arrangement of the double-layer knife handle 3 structure, a certain interval can be made between the straight blade 41 and the curved blade 42, so as to avoid that the distance between the straight blade 41 and the curved blade 42 is too close to reduce the working efficiency. Affect the effect of straw returning to the field.

Embodiment one

As shown in Figures 1-3, a straw returning machine blade includes a main knife shaft 1, a knife holder 2, a knife handle 3 and a blade group 4, the knife holder 2 is fixed on the main knife shaft 1, and the knife The two ends of the handle 3 are respectively hinged to the knife rest 2 and the blade set 4 through pin shafts 5, and are fixed by cotter pins 51; the blade set 4 includes a straight blade 41 and two curved blades 42, and the curved blade 42 is arranged on the Both sides of the blade 41, the front end of the curved blade 42 is provided with an arc-shaped knife point, and the arc-shaped knife point is bent toward the two sides away from the straight blade 41, and the blade directions of the straight blade 41 and the curved blade 42 are all towards the working direction ; The edge of the straight blade 41 and the curved blade 42 is a serrated edge; the handle 3 is provided with a plurality of pin holes 31; the handle 3 is a double-layer structure, so that the straight A certain distance is produced between the blade 41 and the two bent blades 42 by the handle 3 .

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (3)

1. A straw returning machine blade, characterized in that it includes a main knife shaft (1), a knife holder (2), a knife handle (3) and a blade group (4), and the knife holder (2) is fixedly arranged on the main knife On the shaft (1), the two ends of the handle (3) are respectively hinged to the tool holder (2) and the blade set (4) through the pin shaft (5), and are fixed by the cotter pin (51); The blade set (4) includes a straight blade (41) and two curved blades (42), the curved blades (42) are arranged on both sides of the straight blade (41), and the front end of the curved blade (42) is set There is an arc-shaped knife tip, and the arc-shaped knife tip is bent toward the two sides away from the straight blade (41), and the blade directions of the straight blade (41) and the curved blade (42) are all facing the working direction; the straight blade (41) And the edge of the curved blade (42) is a serrated edge. 2. The blade of the straw returning machine according to claim 1, characterized in that: the handle (3) is provided with a plurality of pin holes (31). 3. The blade of the straw returning machine according to claim 1, characterized in that: the handle (3) is a double-layer structure, so that the straight blade (41) and the two curved blades (42) pass through the blade The handle (3) produces a certain spacing.