Straw cutting mechanism

Abstract

The utility model discloses a straw cutting mechanism which comprises a stubble cleaning disc support, a stubble cleaning disc is installed on the stubble cleaning disc support, a grass poking wheel support is hinged to the stubble cleaning disc support, a grass poking wheel is rotationally connected to the front end of the grass poking wheel support, and an extension spring is connected between the rear end of the grass poking wheel support and the lower end of the stubble cleaning disc support. The distance between the grass poking wheel and the hinge point of the grass poking wheel support is smaller than the distance between the extension spring and the hinge point of the grass poking wheel support. During use, the extension spring applies upward force to the rear end of the grass pulling wheel support, and the grass pulling wheel support applies downward force to the grass pulling wheel, so that the pressure of the grass pulling wheel is increased, and the grass pulling and stubble cleaning efficiency is improved. And the structure is simple, the weight is light, different pressures can be realized by selecting different springs, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and in particular to a straw cutting mechanism. Background Art

[0002] Existing stubble-killing devices and weed-pulling wheels, such as Chinese Patent CN212013497U, disclose a weed-pulling wheel counterweight for a no-till seed drill. The counterweight is mounted on the weed-pulling wheel, which is connected to the weed-pulling wheel bracket. The weed-pulling wheel bracket has a rotating shaft mounted on one end of the bracket, and the hub is mounted on the disc, which is connected to the loosening disc bracket. This device has a simple structure and a rational design. The counterweight on the weed-pulling wheel allows the weed-pulling wheel to clear surface straw and weeds during seeding. When the weed-pulling wheel rotates, the counterweight increases pressure on the weed-pulling wheel when the surface is densely covered with straw and weeds, or when the surface is uneven or densely covered with straw and weeds. This allows the no-till seed drill to thoroughly clear straw and prevent entanglement, thereby improving operational efficiency.

[0003] The above technical solution has the following disadvantages: the pressure of the grass-moving wheel is increased by adding a counterweight block to the grass-moving wheel, which results in a complex structure and a large weight. Utility Model Content

[0004] The purpose of the utility model is to provide a straw cutting mechanism with a simple structure and light weight in order to solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model discloses a straw cutting mechanism, including a stubble disc bracket, a stubble disc is installed on the stubble disc bracket, a grass-pulling wheel bracket is hinged on the stubble disc bracket, the front end of the grass-pulling wheel bracket is rotatably connected to the grass-pulling wheel, a tension spring is connected between the rear end of the grass-pulling wheel bracket and the lower end of the stubble disc bracket, and the distance between the grass-pulling wheel and the hinge point of the grass-pulling wheel bracket is smaller than the distance between the hinge points of the tension spring and the grass-pulling wheel bracket.

[0006] During use, the tension spring applies an upward force to the rear end of the weed wheel bracket, which in turn applies a downward force to the weed wheel, increasing the pressure on the weed wheel and improving weed and stubble removal efficiency. This simple, lightweight structure allows for different springs to achieve varying pressures, making it easy to use.

[0007] Preferably, a guide plate is connected to the upper rear end of the grass wheel bracket, a guide groove is provided on the guide plate, and a guide column matching the guide groove is connected to the stubble disc bracket.

[0008] When the angle of the grass-moving wheel bracket changes, the guide plate moves along with the grass-moving wheel bracket, and the guide column is used to guide the guide plate to ensure that the grass-moving wheel bracket moves smoothly.

[0009] Preferably, the guide plate is arc-shaped, and the guide groove is arc-shaped.

[0010] When in use, the arc shape is more consistent with the movement trajectory of the guide plate, and is easy to use.

[0011] Preferably, the rotating shaft of the weed wheel bracket is coaxially arranged with the rotating shaft of the stubble disc.

[0012] This structure is convenient for processing and manufacturing.

[0013] Preferably, the stubble disc bracket includes two stubble disc support arms respectively located on the left and right sides of the stubble disc, and a stubble disc support arm connecting portion is connected between the rear ends of the two stubble disc support arms.

[0014] The stubble removing disc with this structure rotates smoothly and reliably and is convenient to process and manufacture.

[0015] Preferably, the upper end of the tension spring is connected to the lower part of the stubble disc support arm connecting portion.

[0016] This structure is convenient for processing and manufacturing.

[0017] Preferably, the grass-moving wheel bracket includes two grass-moving wheel support arms respectively located on the left and right sides of the grass-moving wheel, and a grass-moving wheel support arm connecting portion is connected between the rear ends of the two grass-moving wheel support arms.

[0018] The grass-moving wheel with this structure rotates smoothly and reliably and is easy to process and manufacture.

[0019] Preferably, the lower end of the tension spring is connected to the upper portion of the connecting portion of the grass-moving wheel support arm.

[0020] This structure is convenient for processing and manufacturing.

[0021] In summary, the beneficial effects of this utility model are as follows: during use, the tension spring applies an upward force to the rear end of the weed-pulling wheel bracket, and the weed-pulling wheel bracket applies a downward force to the weed-pulling wheel, increasing the pressure of the weed-pulling wheel and improving the efficiency of weed-pulling and stubble-killing. This simple structure is lightweight, and different springs can be used to achieve different pressures, making it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a straw cutting mechanism of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of a straw cutting mechanism of the utility model;

[0024] Figure 3 This is a schematic diagram of the top view of a straw cutting mechanism of the utility model;

[0025] Figure 4 yes Figure 1Schematic diagram of the structure of the middle section AA.

[0026] In the figure: 1. Stubble killing disc bracket; 2. Stubble killing disc; 3. Mounting plate; 4. Stubble killing disc shaft; 5. Grass-pulling wheel bracket; 6. Grass-pulling wheel; 7. Grass-pulling wheel shaft; 8. Guide plate; 9. Guide groove; 10. Guide column; 11. Tension spring; 12. Stubble killing disc support arm; 13. Stubble killing disc support arm connecting part; 14. Grass-pulling wheel support arm; 15. Grass-pulling wheel support arm connecting part. DETAILED DESCRIPTION

[0027] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0032] like Figures 1 to 4As shown, a straw cutting mechanism includes a stubble disc bracket 1, with a mounting plate 3 mounted at the rear end of the bracket 1 for connection to a seed drill frame. A stubble disc 2 is mounted on the bracket 1, with a stubble disc rotating shaft 4 mounted between the stubble disc 2 and the bracket 1. The stubble disc rotating shaft 4 is fixedly connected to the bracket 1 and rotatably connected to the stubble disc 2. The mounting plate 3 is connected to the rear end of the bracket 1. A weeding wheel bracket 5 is hingedly connected to the bracket 1, with a weeding wheel 6 rotatably connected to the front end of the weeding wheel bracket 5. A weeding wheel rotating shaft 7 is mounted between the weeding wheel 6 and the weeding wheel bracket 5. A tension spring 11 is connected between the rear end of the weeding wheel bracket 5 and the lower end of the stubble disc bracket. The distance between the weeding wheel 6 and the hinge point of the weeding wheel bracket 5 is less than the distance between the hinge points of the tension spring 11 and the weeding wheel bracket 5.

[0033] During use, the tension spring 11 applies an upward force to the rear end of the weed-pulling wheel bracket 5, and the weed-pulling wheel bracket 5 applies a downward force to the weed-pulling wheel 6, increasing the pressure of the weed-pulling wheel 6 and improving the efficiency of weeding and stubble removal. This structure is simple and light, and different pressures can be achieved by selecting different springs, making it easy to use.

[0034] Specifically, the rotating shaft of the weed wheel bracket 5 is coaxially arranged with the rotating shaft of the stubble disc 4. This structure is convenient for processing and manufacturing. The stubble disc bracket 1 includes two stubble disc support arms 12, which are respectively located on the left and right sides of the stubble disc 2. A stubble disc support arm connecting portion 13 is connected between the rear ends of the two stubble disc support arms 12. This structure ensures smooth and reliable rotation of the stubble disc 2 and is convenient for processing and manufacturing. The upper end of the tension spring 11 is connected to the lower part of the stubble disc support arm connecting portion 13. This structure is convenient for processing and manufacturing. The weed wheel bracket 5 includes two weed wheel support arms 14, which are respectively located on the left and right sides of the weed wheel 6. A weed wheel support arm connecting portion 15 is connected between the rear ends of the two weed wheel support arms 14. This structure ensures smooth and reliable rotation of the weed wheel 6 and is convenient for processing and manufacturing. The lower end of the tension spring 11 is connected to the upper part of the weed wheel support arm connecting portion 15. This structure is convenient for processing and manufacturing.

[0035] Specifically, a guide plate 8 is connected to the upper rear end of the weed-pulling wheel bracket 5. This guide plate 8 is provided with a guide slot 9. A guide post 10 is connected to the stubble disc bracket 1, which mates with the guide slot 9. When the angle of the weed-pulling wheel bracket 5 changes, the guide plate 8 moves with it. The guide post 10 guides the guide plate 8, ensuring smooth movement of the weed-pulling wheel bracket 5. The guide plate 8 and the guide slot 9 are both curved. This curved shape better matches the motion trajectory of the guide plate 8 during use, making it easier to use.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A straw cutting mechanism, comprising a stubble cutting disc support (1), a stubble cutting disc (2) being mounted on the stubble cutting disc support (1), characterized in that: A grass-pulling wheel bracket (5) is hingedly connected to the stubble-killing disc bracket (1); a grass-pulling wheel bracket (6) is rotatably connected to the front end of the grass-pulling wheel bracket (5); a tension spring (11) is connected between the rear end of the grass-pulling wheel bracket (5) and the lower end of the stubble-killing disc bracket; and a distance between the grass-pulling wheel (6) and a hinge point of the grass-pulling wheel bracket (5) is smaller than a distance between a hinge point of the tension spring (11) and the grass-pulling wheel bracket (5).

2. The straw cutting mechanism according to claim 1, characterized in that: A guide plate (8) is connected to the upper rear end of the weed wheel bracket (5), a guide groove (9) is provided on the guide plate (8), and a guide column (10) matched with the guide groove (9) is connected to the stubble disc bracket (1).

3. The straw cutting mechanism according to claim 2, characterized in that: The guide plate (8) is in an arc shape, and the guide groove (9) is in an arc shape.

4. The straw cutting mechanism according to any one of claims 1 to 3, characterized in that: The rotating shaft of the weed wheel bracket (5) is coaxially arranged with the rotating shaft of the stubble disc (4).

5. The straw cutting mechanism according to any one of claims 1 to 3, characterized in that: The stubble disc support (1) comprises two stubble disc support arms (12) respectively located on the left and right sides of the stubble disc (2), and a stubble disc support arm connecting portion (13) is connected between the rear ends of the two stubble disc support arms (12).

6. The straw cutting mechanism according to claim 5, characterized in that: The upper end of the tension spring (11) is connected to the lower part of the stubble disc support arm connecting portion (13).

7. The straw cutting mechanism according to any one of claims 1 to 3, characterized in that: The grass-pulling wheel bracket (5) comprises two grass-pulling wheel support arms (14) respectively located on the left and right sides of the grass-pulling wheel (6), and a grass-pulling wheel support arm connecting portion (15) is connected between the rear ends of the two grass-pulling wheel support arms (14).

8. The straw cutting mechanism according to claim 7, characterized in that: The lower end of the tension spring (11) is connected to the upper part of the grass-moving wheel support arm connecting portion (15).

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