A grass-chopping device used in a grass shredder

Abstract

A grass-chopping device for a grass shredder includes a shaft with at least one grass-chopping unit mounted on it. Each grass-chopping unit has at least two connecting seats. All connecting seats in each grass-chopping unit are installed on the shaft in a spaced-apart and staggered manner. Adjacent connecting seats are angularly offset in the circumferential direction of the shaft and spaced apart in the axial direction. At least one grass-chopping chain is mounted on each connecting seat, and each grass-chopping chain is formed by at least two grass-chopping rings sequentially interlocked. The grass-chopping rings and connecting seats, as well as adjacent grass-chopping rings, can freely rotate or swing. The positive effect of this invention is that, compared with the existing weeding blade structure, this application achieves multi-dimensional performance optimization in weeding operations through the innovative design of flexible grass-chopping chain connection.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery weeding equipment technology, specifically a grass-chopping device used in a grass shredder. Background Technology

[0002] In agricultural production and land preparation, weeders, also known as grass shredders, are commonly used equipment. Their core component, the weeding blade, is the key grass-shredding device used for weeding and shredding. Existing weeding blades typically feature a horizontally mounted shaft with the blades mounted so that their rotational plane is perpendicular to the shaft. Each blade head consists of three blades arranged in a fan shape (left, center, and right). However, this existing structure has the following shortcomings in practical applications:

[0003] First, the weeding effect is unsatisfactory. Due to the horizontal arrangement of the shaft, the rotating surface of the blade is perpendicular to the shaft. When cutting vertically growing grass, even if the blade rotates at high speed, a considerable portion of the grass is only pushed down and cannot be effectively chopped, which is insufficient to meet the requirements of efficient weeding operations.

[0004] Secondly, the equipment is highly susceptible to damage. Existing cutter heads can only rotate or oscillate in a plane perpendicular to the axis, and cannot oscillate left or right along the axis. When there are many protruding stones or hard objects on the ground, the cutter head is easily damaged by impact, and it will also damage the shaft and the transmission and power mechanisms connected to it, increasing equipment maintenance costs and downtime.

[0005] Third, the working environment is poor. In order to increase the area to be hoeed and shredded, the blade head adopts a design with three blades distributed in a fan shape. During operation, the blades are similar to the blades of an electric fan, which drives the surrounding airflow at high speed and generates a "fan effect", causing serious dust, deteriorating the working environment, and affecting the health of operators and the surrounding ecology.

[0006] In summary, the existing weeding blade structure has shortcomings in terms of weeding effect, equipment protection, and working environment. There is an urgent need to develop new weeding blade structures or grass-chopping devices to solve one or more of the above-mentioned technical problems, thereby improving the working performance and practicality of weeding machines. Utility Model Content

[0007] To address one or more of the aforementioned problems, the purpose of this utility model is to provide a grass-chopping device for use with a grass shredder.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a grass-chopping device for a grass shredder, comprising a shaft, at least one grass-chopping unit on the shaft, each grass-chopping unit having at least two connecting seats, all connecting seats in each grass-chopping unit being installed on the shaft in a spaced and staggered manner, adjacent connecting seats being angularly offset in the circumferential direction of the shaft and spaced apart in the axial direction of the shaft; at least one grass-chopping chain is installed on each connecting seat, each grass-chopping chain being formed by at least two grass-chopping rings sequentially fastened together, the grass-chopping rings being able to rotate or swing freely between themselves and the connecting seats, as well as between adjacent grass-chopping rings.

[0009] All connectors in each of the aforementioned grass-shredding units are evenly distributed in the circumferential direction of the shaft, and the angular deviations of two adjacent connectors in the circumferential direction of the shaft are equal.

[0010] The connecting seat is a U-shaped component.

[0011] Each of the aforementioned connecting seats consists of two side-by-side connecting plates. One end of each connecting plate is fixedly connected to a shaft, and the other end has a limiting hole. A limiting pin is installed on the connecting seat, and the limiting pin passes through the two limiting holes. One end of the limiting pin has a limiting pin end, the diameter of which is larger than the diameter of the limiting hole. The other end of the limiting pin has a positioning through hole, and a V-shaped part is installed in the positioning through hole. The open end of the V-shaped part has two bent parts. The V-shaped part cooperates with the limiting pin end to prevent the limiting pin from detaching from the connecting plate.

[0012] Two grass-chopping units are mounted axially on the shaft.

[0013] The positive effects of this utility model are as follows: Compared with the existing weeding blade structure, this application achieves multi-dimensional performance optimization in weeding operations through the innovative design of flexible connection of grass-chopping chains. Specifically:

[0014] Firstly, existing technologies rely on high-speed rotating blades to chop weeds, which can easily lead to "pushing down the grass without chopping or cutting it" due to the cutting angle. In this invention, a power mechanism drives a shaft to rotate, and the shaft drives the grass-chopping chain through a connecting seat. It only needs to maintain the rotational speed of the grass-chopping chain, which extends radially due to inertia, and the speed can be lower than that of existing technologies. The grass-chopping chain consists of multiple grass-chopping rings. During operation, the grass-chopping rings can rotate and swing independently in any direction, forming an "entanglement-pulling / severing" effect with the weeds. This breaks through the reliance on traditional "high-speed cutting," solves the problem that grass is easily pushed down but not easily cut, and achieves the effects of low vibration, low noise, and significant energy saving.

[0015] Secondly, existing blades can only rotate / oscillate in a single plane. When they collide with hard objects, the impact force is directly transmitted to the shaft, transmission, and power mechanisms, easily causing damage. In this invention, the grass-chopping chain, connecting seat, and grass-chopping ring have multi-directional flexible rotation and oscillation characteristics. When encountering protruding stones or hard objects on the ground, the grass-chopping chain can bend like a rope or spring open to the left or right in the forward direction, transforming rigid collisions into flexible avoidance. This effectively blocks the direct transmission of impact force to the shaft and related mechanisms, significantly reducing the risk of equipment damage, extending the service life of the entire machine, and reducing maintenance costs.

[0016] Furthermore, existing blades, due to their fan-shaped distribution and high-speed rotation, generate a "fan effect," causing severe dust pollution. In this invention, the grass-chopping chain operates through "flexible winding," and the airflow generated during rotation is significantly less than that of traditional blades, thus weakening the "fan effect" at its source and reducing dust generation. This not only improves the working environment and protects the health of operators but also reduces the impact on the surrounding ecology, aligning with the needs of green agricultural production.

[0017] In summary, this application achieves synergistic improvements in weed control efficiency, equipment protection, and environmental friendliness through structural innovation, which can solve multiple pain points of existing technologies and has outstanding practical value and promotion significance. Attached Figure Description

[0018] Figure 1 This is a perspective view of the first embodiment of a grass-chopping device used in a grass shredder according to the present invention;

[0019] Figure 2 This is a front view of the first embodiment of a grass-chopping device used in a grass shredder according to the present invention;

[0020] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure;

[0021] Figure 4 This is a perspective view of a second embodiment of a grass-chopping device used in a grass shredder according to the present invention;

[0022] Figure 5 This is a front view of a second embodiment of the grass-chopping device used in a grass shredder according to the present invention;

[0023] Figure 6 yes Figure 5 Schematic diagram of the BB cross-sectional structure;

[0024] Figure 7 yes Figure 4 A magnified view of part of I;

[0025] Figure 8 yes Figure 5 Enlarged view of part II;

[0026] Figure 9 yes Figure 4 The diagram shows the operating state of a grass shredder's grass-shredding device during rotation.

[0027] Figure 10 yes Figure 1 The diagram shows a state where a grass-chopping device used in a grass shredder is installed on the grass shredder or weeder.

[0028] Figure 11 This is a schematic diagram of the structure of the grass-chopping device of an existing grass shredder or weeder, with several cutter heads installed on the shaft (1).

[0029] Figure label:

[0030] 1 axis,

[0031] 2. Connecting seat 20. Connecting plate 21. Limiting pin 22. Positioning through hole 23. V-shaped part 24. Bending part 25. End of limiting pin 26. Washer

[0032] 3 grass clipping rings

[0033] 4-blade head

[0034] 5 protective shields

[0035] 6 support wheels Detailed Implementation

[0036] The purpose of this utility model is to provide a grass-chopping device for use in a grass shredder. The following describes this utility model in further detail with reference to specific embodiments.

[0037] like Figure 1 As shown, the grass-chopping device used in the grass shredder includes a shaft 1. At least one grass-chopping unit is mounted on the shaft 1. Each grass-chopping unit has at least two connecting seats 2. All connecting seats 2 in each grass-chopping unit are installed on the shaft 1 in a spaced-apart and staggered manner. Adjacent connecting seats 2 are angularly offset in the circumferential direction of the shaft 1 and spaced apart in the axial direction of the shaft 1. At least one grass-chopping chain is mounted on each connecting seat 2, and each grass-chopping chain is formed by at least two grass-chopping rings 3 sequentially fastened together. The grass-chopping rings 3 can freely rotate or swing between themselves and the connecting seats 2, as well as between adjacent grass-chopping rings 3. Considering processing costs and usage effects, the grass-chopping rings 3 can be iron rings, and the iron rings are not detachable. The manufacturing cost and difficulty of the grass-chopping chain are significantly lower than the three-blade cutter head used in the prior art, and the maintenance and replacement costs are also lower.

[0038] When using, such as Figure 10 As shown, the power mechanism of the weeder or shredder drives the shaft 1 to rotate via a transmission mechanism. The shaft 1 then drives the connecting seat 2 to rotate. The rotation speed is only required to keep the shredding chain moving under inertia. Figure 9As shown, it extends radially. At this time, shaft 1 drives the grass-breaking chain to beat the weeds through connecting seat 2. Since the grass-breaking chain is composed of at least two grass-breaking rings 3, in the process of beating the weeds, the grass-breaking chain does not mainly rely on high speed to cut the grass, but utilizes the fact that each grass-breaking ring 3 on the grass-breaking chain can flexibly rotate or swing independently in any direction. Thus, it can both hammer the grass and entangle with the grass, and finally pull up or twist the grass. Thus, on the one hand, the rotational speed of shaft 1 can be 10% to 15% lower than that of existing technologies, resulting in less vibration, lower noise, and significant energy savings. On the other hand, since the grass shredder chain and connecting seat 2 can rotate or swing flexibly in multiple directions, and the grass shredder rings 3 on the same grass shredder chain can rotate or swing flexibly in multiple directions, even if the grass shredder chain collides at high speed with a protruding stone or hard object on the ground, it can bend like a rope or bounce left and right in the forward direction. This effectively avoids the impact force acting directly on shaft 1, preventing damage to shaft 1 or the transmission or power mechanism connected to shaft 1. Furthermore, the airflow driven by the grass shredder chain during rotation is significantly smaller than that of the blades in existing technologies, which effectively reduces the "fan effect," resulting in less dust, which is beneficial to improving the working environment and the surrounding ecology.

[0039] All connectors 2 in each of the aforementioned grass-shredding units are evenly distributed circumferentially on the shaft 1, and the angular deviation of any two adjacent connectors 2 in the circumferential direction on the shaft 1 is equal. If there are only two connectors 2, the included angle between them is 180 degrees. Figure 3 and Figure 6 As shown, there are four connecting seats 2. The included angle between any two adjacent connecting seats 2 is 90 degrees, and so on.

[0040] like Figures 1 to 3 As shown, the connecting seat 2 can be a U-shaped component. This structure makes replacing the grass clipping chain difficult, time-consuming, and costly, and is not easy to maintain. To facilitate grass clipping chain replacement and reduce replacement costs and difficulty, the connecting seat 2 can also adopt a different design. Figures 4 to 8 The proposed solution is as follows:

[0041] like Figure 7 As shown, each connecting seat 2 consists of two side-by-side connecting plates 20. One end of each connecting plate 20 is fixedly connected to the shaft 1, and the other end has a limiting hole. A limiting pin 21 is installed on the connecting seat 2, and the limiting pin 21 passes through the two limiting holes. Figure 8 As shown, one end of the limiting pin 21 is provided with a limiting pin end 25, the diameter of which is larger than the diameter of the limiting hole. For example... Figure 7As shown, the other end of the limiting pin 21 is provided with a positioning through hole 22, and a V-shaped part 23 is installed in the positioning through hole 22. The open end of the V-shaped part 23 is provided with two bent portions 24, which can prevent the V-shaped part 23 from coming out of the positioning through hole 22. The V-shaped part 23 cooperates with the end 25 of the limiting pin to prevent the limiting pin 21 from disengaging from the connecting plate 20.

[0042] like Figure 1 and Figure 4 As shown, at least two grass-chopping units are installed axially on shaft 1. More grass-chopping units can provide more grass-chopping chains, increasing the width of the weeding action and thus improving grass-chopping efficiency. Since the weeder or grass chopper is a small, hand-held, single-person operated device, the number of grass-chopping units should not exceed three. Of course, the solution described in this invention can also be used for larger equipment; in this case, the number of grass-chopping units can be increased according to customer needs, for example, five or ten units. This invention is mainly used for weeding and grass chopping, and can also be applied to various scenarios such as land reclamation, stubble removal, straw return to the field, and seedling killing.

[0043] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A grass chopping device used in a grass chopping machine, comprising a shaft (1) and at least one grass chopping unit arranged on the shaft (1), each grass chopping unit having at least two connecting seats (2), characterized in that: All the connecting seats (2) in each grass-chopping unit are installed on the shaft (1) in a spaced and staggered manner. The two adjacent connecting seats (2) are set at an angular deviation in the circumference of the shaft (1) and are distributed at intervals in the axial direction of the shaft (1). At least one grass-chopping chain is installed on each connecting seat (2). Each grass-chopping chain is formed by at least two grass-chopping rings (3) being snapped together in sequence. The grass-chopping rings (3) can rotate or swing freely between the connecting seat (2) and between the two adjacent grass-chopping rings (3).

2. A grass chopping device for use in a grass chopper as claimed in claim 1, wherein: All connectors (2) in each of the aforementioned grass-shredding units are evenly distributed in the circumferential direction of the shaft (1), and the angular deviations of two adjacent connectors (2) in the circumferential direction of the shaft (1) are equal.

3. The grass-chopping device used in a grass shredder according to claim 1, characterized in that: The connecting seat (2) is a U-shaped piece.

4. The grass-chopping device used in a grass shredder according to claim 1, characterized in that: Each of the connecting seats (2) consists of two connecting plates (20) arranged side by side. One end of each connecting plate (20) is fixedly connected to the shaft (1), and the other end is provided with a limiting hole. A limiting pin (21) is installed on the connecting seat (2). The limiting pin (21) passes through the two limiting holes. One end of the limiting pin (21) is provided with a limiting pin end (25). The diameter of the limiting pin end (25) is larger than the diameter of the limiting hole. The other end of the limiting pin (21) is provided with a positioning through hole (22). A V-shaped part (23) is installed in the positioning through hole (22). The open end of the V-shaped part (23) is provided with two bent parts (24). The V-shaped part (23) and the limiting pin end (25) cooperate to prevent the limiting pin (21) from separating from the connecting plate (20).

5. The grass-chopping device used in a grass shredder according to claim 1, characterized in that: Two grass-chopping units are installed axially on the shaft (1).

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