Die-cast cutter head for a lawnmower

Abstract

The utility model discloses a die casting tool bit for mower relates to the field of metal processing technology that does not include other categories, a die casting tool bit for mower, including die casting tool bit main part, be provided with six angle adjusting assemblies on die casting tool bit main part, and angle adjusting assembly includes cutting blade, fixed link, adjusting bolt and connecting rod, when processing low and slender lawn grass in angle adjusting assembly, can adjust cutting blade to relatively gentle angle, make cutting edge and grass stem form the contact angle of adaptation, avoid grass stem to be extruded, ensure that the lawn surface is even after pruning, when cutting tall and thick or lignified weed, can adjust to relatively precipitous, enhance the cutting ability of blade to hard stem, reduce cutting resistance, avoid the " card grass " or " miss cutting " phenomenon that leads to improper blade angle, this angle adjustable characteristics, make the same tool bit can adapt to the growth characteristics of different types of herbaceous plants.

Description

Technical Field

[0001] This utility model relates to the field of metal processing technology not included in other categories, and in particular to a die-cast blade for a lawnmower. Background Technology

[0002] In garden maintenance and lawn trimming, lawnmowers are core equipment, and the performance of their blades directly affects work efficiency, lawn trimming quality, and the lifespan of the equipment.

[0003] Currently, most lawnmower blades on the market use die-cast blades with a fixed connection between the blade and the cutter head. This means the blade is rigidly connected to the cutter head via welding or integral die-casting, and the cutting angle is fixed after manufacturing, making it impossible to adjust according to actual operational needs. This fixed-angle blade design presents challenges when dealing with complex and varied lawn environments. Different types of grasses have different growth characteristics; some turfgrasses are short and have slender stems, while others are tall, have thick stems, and are highly lignified. When using a fixed-angle blade to cut short, slender turfgrasses, if the blade angle is relatively gentle, while reducing disturbance to the lawn soil, the poor contact angle between the cutting edge and the grass stem may cause some stems to be squeezed rather than cut, resulting in uneven lawn trimming. Conversely, if the blade angle is too steep, it may easily sink into the soil surface during cutting, increasing the equipment's operating resistance and removing soil, damaging the lawn's integrity and reducing the blade's practicality. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a die-cast blade head for lawnmowers that solves the problem that the cutting angle of the blade is fixed after manufacturing and cannot be adjusted according to actual operation needs. This fixed-angle blade design has many problems when facing complex and varied lawn environments. First, different types of grasses have different growth characteristics. Some lawn grasses grow short and have slender stems, while some weeds grow tall, have thick stems and a high degree of lignification. When using a fixed-angle blade to cut short and slender lawn grasses, if the blade angle is relatively gentle, although it can reduce disturbance to the lawn soil, it may cause some grass stems to be squeezed rather than cut due to poor contact angle between the cutting edge and the grass stem, resulting in an uneven lawn after mowing. If the blade angle is too steep, it is easy to sink into the soil surface during the cutting process, which not only increases the running resistance of the equipment, but also brings out some soil, damaging the integrity of the lawn, and thus reducing the practicality of the blade head.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a die-cast blade head for a lawnmower, comprising a die-cast blade head body, wherein the die-cast blade head body is provided with six angle adjustment components;

[0006] The angle adjustment assembly includes a cutting blade, a fixing rod, an adjusting bolt, and a connecting rod. The outer wall of the connecting rod is connected to the outer wall of the cutting blade. The lower outer wall of the die-cast cutter head body has six grooves, and each of the six grooves has multiple adjusting bolt slots. The lower outer wall of the connecting rod is threaded with an adjusting bolt.

[0007] Preferably, one side of the cutting blade is arc-shaped.

[0008] Preferably, the inner wall of the groove is arc-shaped, and one end of the fixing rod is fixedly installed inside the corresponding groove.

[0009] Preferably, the outer wall of the connecting rod has a groove that is rotatably connected to the outer wall of the fixing rod, and the inner wall of the groove is in contact with the upper outer wall of the connecting rod.

[0010] Preferably, the plurality of adjusting bolt slots are arranged in an arc shape inside the corresponding groove.

[0011] Preferably, the end of the adjusting bolt near the adjusting bolt groove has its thread extending into the inside of the groove and connecting with the internal thread of the corresponding adjusting bolt groove.

[0012] Preferably, the six angle adjustment components are evenly distributed in a ring around the central axis of the die-casting cutter head body;

[0013] The included angle between two adjacent angle adjustment components is 60 degrees.

[0014] Preferably, the outer wall of the connecting rod is connected to the outer wall of the cutting blade by welding.

[0015] Preferably, the inner diameter of the groove on the outer wall of the connecting rod is clearance-fitted with the outer diameter of the fixing rod.

[0016] Preferably, the multiple adjusting bolt slots inside the groove are arranged at equal arc intervals along the arc-shaped inner wall of the groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The die-cast blades used in this lawnmower, through the angle adjustment component, can be adjusted to a relatively gentle angle when dealing with low-growing, fine turf grasses, so that the cutting edge forms a suitable contact angle with the grass stem, avoiding the grass stem being squeezed and ensuring a smooth lawn surface after mowing. When cutting tall, thick, or woody weeds, the angle can be adjusted to a relatively steep angle, enhancing the blade's ability to cut into hard stems, reducing cutting resistance, and avoiding "grass jamming" or "missed cutting" caused by improper blade angle. This adjustable angle feature allows the same blade to adapt to the growth characteristics of different types of herbaceous plants, significantly improving the lawnmower's applicability in complex lawn environments. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the external structure of the cutting blade of this utility model;

[0022] Figure 3 This is a schematic diagram of the external structure of the adjusting bolt of this utility model;

[0023] Figure 4 This utility model Figure 3 A structural schematic diagram of the enlarged view at point A in the middle.

[0024] Reference numerals: 1. Die-cast cutter head body; 2. Cutting blade; 3. Adjusting bolt groove; 4. Fixing rod; 5. Adjusting bolt; 6. Connecting rod; 7. Groove. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Please see Figure 1-4 This utility model provides a technical solution: a die-cast blade for a lawnmower, comprising a die-cast blade body 1;

[0030] The die-casting cutter head body 1 is equipped with six angle adjustment components;

[0031] The angle adjustment assembly includes a cutting blade 2, a fixing rod 4, an adjusting bolt 5, and a connecting rod 6. The outer wall of the connecting rod 6 is connected to the outer wall of the cutting blade 2. One side of the cutting blade 2 is arc-shaped. The lower outer wall of the die-cast cutter head body 1 has six grooves 7. The inner wall of the grooves 7 is arc-shaped. One end of the fixing rod 4 is fixedly installed inside the corresponding groove 7. The outer wall of the connecting rod 6 has a slot that is rotatably connected to the outer wall of the fixing rod 4. The inner wall of the groove 7 is in contact with the upper outer wall of the connecting rod 6. Each of the six grooves 7 has multiple adjusting bolt slots 3. The multiple adjusting bolt slots 3 are arranged in an arc shape inside the corresponding groove 7. The lower outer wall of the connecting rod 6 is threaded with an adjusting bolt 5. The end of the adjusting bolt 5 near the adjusting bolt slot 3 extends into the groove 7 and is threadedly connected to the inner thread of the corresponding adjusting bolt slot 3.

[0032] Furthermore, when using this device, firstly, when it is necessary to adjust the angle of the cutting blade 2 to adapt to different grass conditions or operating scenarios, firstly, rotate the adjusting bolt 5 in the opposite direction so that the end of the adjusting bolt 5 close to the adjusting bolt groove 3 gradually disengages from the corresponding adjusting bolt groove 3, releasing the locking constraint on the connecting rod 6. At this time, the connecting rod 6 loses the fixing effect of the adjusting bolt 5 and can rotate freely around the fixed rod 4. Then, since the inner wall of the groove 7 is arc-shaped and contacts the upper outer wall of the connecting rod 6, the connecting rod 6 will slide along the arc-shaped inner wall of the groove 7 when it rotates, driving the cutting blade 2 fixedly connected to it to rotate synchronously, realizing the change of the angle of the cutting blade 2. The arc-shaped design on one side of the cutting blade 2 is adapted to the arc-shaped inner wall of the groove 7, ensuring that the cutting blade 2 will not interfere with the die-casting cutter head body 1 during rotation, while ensuring the smoothness of the rotation trajectory. Then, when the cutting blade 2 rotates... When the desired angle is reached, rotate the adjusting bolt 5 forward so that its threaded end extends along the internal thread of the connecting rod 6 into the groove 7 and aligns with the adjusting bolt groove 3 corresponding to that angle position. It is then screwed into the adjusting bolt groove 3 through threaded engagement. As the adjusting bolt 5 is tightened, its end fits tightly against the inner wall of the adjusting bolt groove 3. The threaded locking force fixes the connecting rod 6 and the groove 7 relative to each other, thereby locking the angle of the cutting blade 2. Then, when the lawnmower is working, the die-cast blade body 1 rotates at high speed, driving the six angle adjustment components to rotate synchronously. The cutting blade 2 contacts the grass stem to perform the cutting operation. At this time, the fixing rod 4 bears the radial force transmitted by the cutting blade 2, ensuring that the connecting rod 6 does not deviate radially. The threaded connection between the adjusting bolt 5 and the adjusting bolt groove 3 bears the axial force, preventing the connecting rod 6 from rotating under centrifugal force and ensuring the stability of the cutting blade 2 angle.

[0033] When cutting low-growing, fine turf grasses, the angle adjustment component allows the cutting blade 2 to be adjusted to a relatively gentle angle, creating a suitable contact angle between the cutting edge and the grass stem. This prevents the grass stem from being squeezed and ensures a smooth lawn surface after mowing. When cutting tall, thick, or woody weeds, the angle can be adjusted to a relatively steep angle, enhancing the blade's ability to cut into hard stems, reducing cutting resistance, and preventing "grass jamming" or "missed cuts" caused by improper blade angle. This adjustable angle feature allows the same blade head to adapt to the growth characteristics of different types of herbaceous plants, significantly improving the mower's applicability in complex lawn environments.

[0034] Structural Description: Die-cast blade body 1: As the basic load-bearing structure of the entire blade, it is integrally formed by die casting process and is in the shape of a disc. There are six grooves 7 evenly distributed on the lower outer wall. The position of the grooves 7 corresponds to the six angle adjustment components, providing installation and movement space for the angle adjustment components. At the same time, it provides stable support for each component through its own structure, ensuring the rigidity and stability of the overall structure when mowing grass.

[0035] Cutting blade 2: As a component that directly participates in the cutting operation, one side of it is designed with an arc shape. This arc structure can reduce the direct collision with the grass stem during cutting, reduce cutting resistance, and improve the guiding effect of grass chips. The outer wall of the cutting blade 2 is fixedly connected to the outer wall of the connecting rod 6. The angle of the blade is adjusted by rotating the connecting rod 6, thereby adapting to different cutting needs.

[0036] Adjusting bolt groove 3: It is formed inside the groove 7. Each groove 7 has multiple adjusting bolt grooves 3, and the multiple adjusting bolt grooves 3 are arranged in an arc shape in the corresponding groove 7. The inner wall of the adjusting bolt groove 3 has internal threads, which are used to cooperate with the external threads of the adjusting bolt 5. The connecting rod 6 is fixed through the threaded connection of the two, thereby locking the angle of the cutting blade 2. The arc-shaped arrangement design matches the rotation trajectory of the connecting rod 6, ensuring stable fixation at different angle positions.

[0037] Fixed rod 4: One end is fixedly installed inside the corresponding groove 7, and the other end extends to the opening direction of the groove 7. Its outer wall is rotatably connected to the groove opened on the outer wall of the connecting rod 6. The fixed rod 4 serves as the rotation fulcrum of the connecting rod 6, providing axial constraint for the rotation of the connecting rod 6, ensuring that the connecting rod 6 will not deviate during rotation, and bearing the radial force transmitted by the cutting blade 2 to ensure the stability of the angle adjustment process.

[0038] Adjusting bolt 5: It is threaded to the lower outer wall of the connecting rod 6. The end of the adjusting bolt 5 near the adjusting bolt groove 3 has an external thread. When it is necessary to fix the angle of the cutting blade 2, the threaded end of the adjusting bolt 5 can extend into the inside of the groove 7 and connect with the internal thread of the corresponding adjusting bolt groove 3. The connecting rod 6 and the groove 7 are fixed relative to each other by the thread locking force. When it is necessary to adjust the angle, the adjusting bolt 5 is rotated in the opposite direction to disengage it from the adjusting bolt groove 3 and release the constraint on the connecting rod 6.

[0039] Connecting rod 6: As an intermediate component connecting the cutting blade 2 and the fixed rod 4, its outer wall is fixedly connected to the outer wall of the cutting blade 2 to ensure that the cutting blade 2 rotates synchronously with the connecting rod 6. The outer wall of the connecting rod 6 is provided with a groove that matches the fixed rod 4. It is rotatably connected to the fixed rod 4 through the groove to realize the rotation action around the fixed rod 4. Its lower outer wall is provided with an internal thread that matches the adjusting bolt 5. Its upper outer wall is in contact with the inner wall of the groove 7. The arc-shaped inner wall of the groove 7 provides guidance for the rotation of the connecting rod 6 to avoid jamming during the rotation.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A die-cast blade for a lawnmower, comprising a die-cast blade body (1), characterized in that: The die-casting cutter head body (1) is provided with six angle adjustment components; The angle adjustment assembly includes a cutting blade (2), a fixing rod (4), an adjusting bolt (5), and a connecting rod (6). The outer wall of the connecting rod (6) is connected to the outer wall of the cutting blade (2). The lower outer wall of the die-casting cutter head body (1) has six grooves (7). Each of the six grooves (7) has multiple adjusting bolt slots (3). The lower outer wall of the connecting rod (6) is threaded with an adjusting bolt (5).

2. The die-cast blade for a lawnmower according to claim 1, characterized in that: The cutting blade (2) has an arc-shaped side.

3. The die-cast blade for a lawnmower according to claim 1, characterized in that: The inner wall of the groove (7) is arc-shaped, and one end of the fixing rod (4) is fixedly installed inside the corresponding groove (7).

4. The die-cast blade for a lawnmower according to claim 1, characterized in that: The outer wall of the connecting rod (6) has a groove that is rotatably connected to the outer wall of the fixing rod (4), and the inner wall of the groove (7) is in contact with the upper outer wall of the connecting rod (6).

5. A die-cast blade for a lawnmower according to claim 1, characterized in that: The multiple adjusting bolt slots (3) are arranged in an arc shape inside the corresponding grooves (7).

6. The die-cast blade for a lawnmower according to claim 1, characterized in that: The end of the adjusting bolt (5) near the adjusting bolt groove (3) extends into the interior of the groove (7) and is connected to the internal thread of the corresponding adjusting bolt groove (3).

7. A die-cast blade for a lawnmower according to claim 1, characterized in that: The six angle adjustment components are evenly distributed in a ring around the central axis of the die-casting cutter head body (1); The included angle between two adjacent angle adjustment components is 60 degrees.

8. A die-cast blade for a lawnmower according to claim 1, characterized in that: The outer wall of the connecting rod (6) is connected to the outer wall of the cutting blade (2) by welding.

9. A die-cast blade for a lawnmower according to claim 4, characterized in that: The inner diameter of the groove on the outer wall of the connecting rod (6) is clearance-fitted with the outer diameter of the fixing rod (4).

10. A die-cast blade for a lawnmower according to claim 5, characterized in that: Multiple adjusting bolt slots (3) inside each groove (7) are arranged at equal arc intervals along the arc-shaped inner wall of the groove (7).

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