Cutting mechanism and grass cutting apparatus

Abstract

This specification provides a cutting mechanism and a lawn mowing device. The cutting mechanism, applicable to lawn mowing equipment, specifically includes a blade disc body and at least two cutting components. Each cutting component includes multiple cutting units distributed around the circumference of the blade disc body. Each cutting unit has a cutting point at its end furthest from the blade disc body. The cutting points of the cutting units in different cutting components form cutting trajectories with different cutting radii. The side of the blade disc body facing the object to be cut is the cutting side. The cutting points of each cutting unit can move along their respective cutting trajectories within a working plane at the same horizontal height on the cutting side, achieving a multi-stage cutting effect. Simultaneously, a uniform height reference is set for all cutting actions, ensuring that the cutting process always revolves around a preset height. This solves the problems of insufficient cutting height and missed cuts caused by the object being cut lying down, without reducing the rotational efficiency of the blade disc body.

Description

Technical Field

[0001] This specification relates to the technical field of lawnmowers, and more particularly to a cutting mechanism and lawnmower equipment. Background Technology

[0002] Currently, lawn mowing equipment typically uses a blade disc as the cutting component. Multiple blades are mounted on the edge of the blade disc. By driving the blade disc to rotate at high speed, the blades move along the circumferential trajectory of the blade disc, thereby using the cutting edge of the cutting unit to cut the object to be cut, thus achieving the cutting operation.

[0003] In related technologies, to ensure cutting efficiency, the cutter head often needs to maintain a high rotation speed. However, the high-speed rotating blades generate strong disturbances in the surrounding air, creating wind pressure radially outward and downward along the cutter head. When this wind pressure acts on the object to be cut, it bends the originally upright object (such as weed stems) outward or downward, causing it to tilt or even fall over. At this time, the blade edge can only cut the object in the fallen state. As the cutting unit moves away from the cutting area and the wind pressure disappears, the cut object gradually returns to a near-vertical state due to its own elasticity. This directly results in the residual height of the object after it returns to vertical being much higher than the user-preset cutting height. In some areas, there are even missed cuts due to the severe fall of the object, ultimately leading to poor lawn or green space trimming and seriously affecting the cutting quality. Utility Model Content

[0004] To overcome the problems existing in related technologies, this specification provides a cutting mechanism and mowing equipment to solve the problems of the cutting height of the object to be cut being higher than the preset value and missed cutting.

[0005] According to a first aspect of the embodiments of this specification, a cutting mechanism is provided for use in a lawn mowing device, the cutting mechanism comprising:

[0006] The cutter head body; and

[0007] At least two cutting components, each of which includes a plurality of cutting units, each of which is distributed around the circumference of the cutter head body, and at least a portion of the cutting unit is located outside the cutter head body on the axial projection plane of the cutter head body, and the cutting unit has a cutting point at its end away from the cutter head body;

[0008] The blade body is configured to rotate under the drive of the power unit of the mowing equipment and drive the cutting unit to move synchronously. The cutting points of each cutting unit in the same cutting assembly form a cutting trajectory with the same cutting radius, and the cutting points of the cutting units in different cutting assemblies form a cutting trajectory with different cutting radii.

[0009] The side of the cutter head body facing the object to be cut is the cutting side, and the cutting point of each cutting unit can move along its respective cutting trajectory in the working plane at the same horizontal height on the cutting side.

[0010] Currently, when the cutting disc of a cutting mechanism rotates at high speed, the blades at the edges strongly disturb the surrounding air, creating wind pressure radially outward and downward along the disc. This wind pressure can bend the object to be cut, which is initially inclined to be vertical, into a tilted or even collapsed state. As a result, the blades can only cut the lower part of the collapsed object. When the object recovers to a near-vertical state due to its own elasticity, its residual height is much higher than the user-preset cutting height. Furthermore, some areas may be missed due to the severe collapse of the object, ultimately resulting in poor cut flatness and significantly affecting the cutting quality. This application uses the disc body as the power transmission component and is equipped with at least two cutting components. Each cutting component contains multiple cutting units distributed around the circumference of the disc body. By using the cutting units in different cutting components to form cutting trajectories with different cutting radii, a multi-stage cutting effect is achieved. Meanwhile, the cutting points of each cutting unit are set to be on the same horizontal working plane on the cutting side of the cutter head body (the side facing the object to be cut), setting a unified height reference for all cutting actions to ensure that the cutting process always revolves around the preset height, avoiding the problem of exacerbated by the height deviation of the cutting point, and solving the above problems without reducing the rotation efficiency of the cutter head body.

[0011] Driven by the power unit of the lawnmower, the main body of the cutter head synchronously moves all cutting units along their respective circular trajectories. Due to the differences in the trajectory radii of different cutting components, the cutting component with the larger cutting radius will first contact the fallen object to be cut, completing the first cut. At this time, the force-bearing area of ​​the cut object is greatly reduced, and its own supporting lever arm is shortened. Even with the continued effect of wind pressure, it can quickly return to a near-vertical state. Subsequently, the cutting component with the smaller cutting radius will perform a second cut on the restored object along the same horizontal working plane, accurately cutting it to the preset height, thus solving the problem of the residual height of the object exceeding the preset height after restoration. At the same time, the second cut can also cover areas that may have been missed after the first cut, effectively reducing the risk of missed cuts, ensuring that the cutting height of the objects to be cut is consistent throughout the working area, significantly improving the flatness of the lawn or green space, and thoroughly improving the cutting quality.

[0012] In some exemplary embodiments of this disclosure, the cutting units of each cutting assembly are arranged alternately in the circumferential direction of the cutter head body; and

[0013] The included angle between any two adjacent cutting units is equal.

[0014] In this type of embodiment, if the cutting units with different cutting radii are classified into Class I and Class II, the cutting units of each cutting component need to be arranged sequentially along the circumference of the blade disc body according to the rule of "Class I, Class II, Class I, Class II..." to avoid the problem of concentrated distribution or continuous arrangement of cutting units of the same cutting component, and to prevent the object to be cut from being continuously and repeatedly cut by cutting units with the same cutting radius. This reduces the rotational resistance of the blade disc body to a certain extent, which reduces the operating load of the mowing equipment and extends the service life of the cutting unit.

[0015] By fixing the circumferential interval angle between adjacent cutting units, it is ensured that the trajectory of all cutting units can cover the entire working area at equal intervals when the cutter head rotates, maintaining the uniformity of cutting and avoiding the phenomenon of missed cutting due to gaps in the cutting trajectory coverage, which may result in the object to be cut being in an area where the distance between two cutting units is too large. This significantly improves the flatness of the working area after cutting.

[0016] In some exemplary embodiments of this disclosure, the cutting assembly includes a first cutting assembly and a second cutting assembly, wherein the first cutting assembly includes three first cutting units and the second cutting assembly includes three second cutting units;

[0017] The first cutting unit and the second cutting unit are arranged alternately in the circumferential direction of the cutter head body, and the included angle between any adjacent first cutting unit and second cutting unit is equal.

[0018] In this type of embodiment, the cutting assembly is divided into a first cutting assembly containing three first cutting units and a second cutting assembly containing three second cutting units. The cutting assembly containing three cutting units determines the coverage density of the cutting trajectory. The alternating arrangement of the first and second cutting units in the circumferential direction of the cutter head body ensures that the cutting trajectories with different cutting radii are connected in an orderly manner, making the cutting rhythm and coverage of the cutting mechanism precise and controllable.

[0019] Specifically, the six cutting units divide the circumference of the cutter head into six equal intervals. The alternating sequence of the first and second cutting units avoids the problem of overlapping cuts caused by consecutive cutting units with the same cutting radius, ensuring that objects at any position can be cut in an alternating sequence of larger and smaller cutting radii. Furthermore, the time interval between cuts by cutting units with different cutting radii is completely consistent. This stable time interval perfectly matches the elastic recovery process of the object after the first cut, avoiding the problem of insufficient recovery of some objects due to fluctuating cutting intervals, and solving the problem of residual height exceeding the preset value after cutting.

[0020] Secondly, the six cutting units are evenly distributed and the two types of radius trajectories alternately cover the cutting range of different cutting radii when the cutter head rotates. No matter which direction the object to be cut falls due to wind pressure, it can fall into the cutting trajectory range of a certain unit. Even if the object to be cut swings slightly under the action of wind pressure, it can be captured and cut off by the first cutting unit with a larger cutting radius first, and then cut off by the second cutting unit with a smaller cutting radius later, reducing the situation of missed cutting due to swinging beyond a certain trajectory range.

[0021] In some exemplary embodiments of this disclosure, the cutter head body is provided with a plurality of first mounting portions and a plurality of second mounting portions; the first mounting portions and the second mounting portions are arranged concentrically with the rotation center of the cutter head body, the distance from the first mounting portion to the rotation center of the cutter head body is greater than the distance from the second mounting portion to the rotation center of the cutter head body, the first mounting portions and the second mounting portions are equally spaced and alternately distributed along the circumferential direction of the cutter head body, and the first mounting portions and the second mounting portions are staggered in the radial direction of the cutter head body;

[0022] The first cutting unit and the second cutting unit have the same length; the first cutting unit is mounted on the first mounting part, and the second cutting unit is mounted on the second mounting part, so that the cutting points of the first cutting unit and the second cutting unit form cutting trajectories with different cutting radii.

[0023] In this type of embodiment, the length difference between the first cutting unit and the second cutting unit is determined by the positional difference between the first mounting part and the second mounting part of the cutter head body. The difference in different cutting radii is transferred from the specifications of the cutting unit itself to the mounting structure of the cutter head body, thus retaining the function of cutting in stages with different cutting radii.

[0024] This type of embodiment also solves cost and assembly problems by standardizing the cutting unit specifications. The first and second cutting units are of the same length, enabling standardized mass production without the need for independent processing of cutting units of different lengths, thus reducing investment in production equipment and procurement complexity. Furthermore, during the assembly of the first and second cutting units, operators do not need to sort cutting units of different lengths; they only need to install the standardized cutting units to the corresponding first and second mounting sections, avoiding cutting abnormalities caused by incorrect installation, improving assembly efficiency, and reducing rework rates. In addition, during the later maintenance and replacement of the cutting units, there is no need to specifically distinguish between the first and second mounting sections for different specifications of the first and second cutting units, reducing the types of spare parts inventory and improving the efficiency of cutting unit maintenance and replacement.

[0025] In some exemplary embodiments of this disclosure, the cutter head body is provided with a plurality of first mounting portions and a plurality of second mounting portions; the first mounting portions and the second mounting portions are equally spaced and alternately distributed along the circumferential direction of the cutter head body, and the distance between each first mounting portion and the rotation center of the cutter head body is equal to the distance between each second mounting portion and the rotation center of the cutter head body;

[0026] The length of the first cutting unit is greater than or less than the length of the second cutting unit; the first cutting unit is mounted on the first mounting part, and the second cutting unit is mounted on the second mounting part, so that the cutting points of the first cutting unit and the second cutting unit form cutting trajectories with different cutting radii.

[0027] In this type of embodiment, the difference in length between the first cutting unit and the second cutting unit determines the difference in position between the first mounting part and the second mounting part. This transfers the difference in different cutting radii from the mounting structure of the cutter head body to the specifications of the cutting unit itself, thus preserving the function of cutting in stages with different cutting radii.

[0028] This type of embodiment can also achieve flexible adaptation of the cutting radius difference by adjusting the lengths of the first and second cutting units. Specifically, this embodiment does not require changing the mounting structure of the cutter head body; simply by replacing cutting units of different lengths, the radius difference of different cutting trajectories can be adjusted. This flexibility allows the same cutter head body to adapt to objects of different heights and densities, eliminating the need for separate cutter head design for specific scenarios and significantly improving the equipment's versatility and scalability. Secondly, since the first and second mounting parts are located on the same circumference, the mounting parts only need to be set at the same radial position during the machining of the cutter head body, eliminating the need for separate machining at different radius positions. This reduces the machining steps and precision requirements of the cutter head body, lowering production costs. Furthermore, when it is necessary to adjust the cutting effect of the cutting mechanism, the user only needs to replace cutting units of different lengths, without replacing the entire cutter head body, which reduces upgrade costs and facilitates later maintenance.

[0029] In some exemplary embodiments of this disclosure, the difference in radius of the cutting trajectory formed by any two adjacent cutting components is proportional to the feed speed of the cutter head body toward the cutting side.

[0030] In this type of embodiment, by synchronously changing the radius difference with the feed speed, the static radius difference is adjusted into a dynamic adaptive adjustment. The direct proportionality between the "radius difference" and the "feed speed" essentially indirectly controls the time interval between the first and second cuts of the object to be cut by adjusting the spatial span between different cutting components. The greater the difference in the radius of the cutting trajectory formed by any two adjacent cutting components, the faster the feed speed of the cutter head body in the cutting direction; the smaller the difference in the radius of the cutting trajectory formed by any two adjacent cutting components, the lower the feed speed of the cutter head body in the cutting direction, and vice versa.

[0031] Thus, this type of embodiment, through the direct proportionality between the "radius difference" and the "feed speed," ensures that the object to be cut has sufficient time to recover from its collapsed state after the first cut to a vertical position before being cut a second time to the preset height. This achieves dynamic adaptation between different parameters, ensuring a constant recovery time for the object. By ensuring that the object is always cut in a near-vertical position for the second cut, and that the cutting point always aligns with the same horizontal working plane, the deviation in cutting height under different areas and speeds is controlled within a preset range. This reduces unexpected cutting deviations, significantly improves cutting smoothness, and solves the problem of uncontrolled cutting height caused by speed fluctuations.

[0032] Furthermore, this type of embodiment helps balance operational efficiency and cutting quality, avoiding wasted efficiency. In related technologies, the difference in radius between the cutting trajectories formed by adjacent cutting components is set to a value adapted to the highest feed speed of the cutter head body. This results in the spatial span between two cuts exceeding the requirements when the feed speed of the cutter head body is slow. The dynamic adjustment of the "radius difference" and "feed speed" in this type of embodiment can effectively avoid the efficiency waste caused by excessive spatial span, achieving a balance between the "radius difference" and "feed speed".

[0033] In some exemplary embodiments of this disclosure, the cutter head body is inclined downwards toward the cutting side on a horizontal plane from its rotation center, and the angle between the cutter head body and the horizontal plane is 3-5°.

[0034] In this type of embodiment, based on the fact that the cutting points of each cutting unit can move along their respective cutting trajectories within the working plane at the same horizontal height on the cutting side, the cutter head body is tilted downwards towards the horizontal plane from its rotation center, which can effectively reduce the impact of wind pressure collapse on the residual height.

[0035] In related technologies, when the horizontally positioned cutter head is cutting, the high-speed rotation generates wind pressure that causes the object to be cut to bend and collapse outwards. The cutting unit can only cut the upper part of the collapsed object. After the wind pressure dissipates, the remaining lower part will elastically recover and stand upright, resulting in an actual cutting height far exceeding the preset value. Tilting the cutter head downwards at a 3-5° angle towards the cutting side can, to some extent, change the direction of the wind pressure generated by the cutter head, alleviating the collapse of the object on the cutting side. This allows the cutting mechanism to cut the object at a position closer to the preset height. Even if the object collapses outwards due to wind pressure, the tilted cutter head allows each cutting unit to be closer to the target height of the object, accurately cutting the lower part and reducing the residual height after recovery from the source. The 3-5° angle ensures that the cutting angle is sufficiently downward to reach the lower part of the object without causing the cutting unit to scratch the ground or interfere with the main body of the mowing equipment due to an excessively large angle.

[0036] Secondly, the design of the cutter head body tilting downwards towards the cutting side, combined with the centrifugal force generated by the rotation of the cutting unit, causes the object being cut to be naturally thrown to the outer side of the cutting side (away from the center of the cutter head's operation) along the tilt direction, preventing it from accumulating under the cutter head body. The 3-5° angle also better balances the centrifugal force, avoiding the accumulation of the object being cut due to insufficient tilt angle, or the splashing of the object due to excessive tilt angle, which would create a secondary cleaning burden.

[0037] In some example embodiments of this disclosure, each of the cutting components is disposed in different cutting planes along the axial direction of the cutter head body, and the cutting units located on the same cutting plane form the same cutting radius.

[0038] In this type of embodiment, cutting planes of different heights are divided along the axial direction of the cutter head body, creating a height difference between different cutting components in physical space. This compensates for the deviation caused by the cutter head tilt, counteracts the height shift of the cutting points caused by the tilt of the cutter head body, and ultimately allows the cutting points of all cutting units to converge again on the same horizontal working plane on the cutting side, accurately maintaining the cutting reference and ensuring a uniform cutting height under the tilted cutter head. This approach retains the advantages of the tilted cutter head body while ensuring the cutting accuracy of the cutting mechanism by returning all cutting points to the same horizontal working plane. It resolves the potential conflict between the tilting function and the horizontal reference, enabling the lawnmower to operate efficiently in complex scenarios while ensuring a smooth trim.

[0039] In some example embodiments of this disclosure, the cutting radius formed by the cutting units located in different cutting planes decreases sequentially from top to bottom along the axial direction of the cutter head body.

[0040] In this type of embodiment, the cutting radius formed by cutting units located in different cutting planes decreases sequentially from top to bottom with height, creating a linkage between the axial position and radial dimension of the cutting trajectory. Cutting units on the axially higher cutting plane need to have a larger radius, while those on the axially lower cutting plane use a smaller radius. The difference between the two precisely compensates for the horizontal distance deviation caused by the axial height difference, ultimately ensuring that the cutting points of all cutting units converge on the same horizontal working plane on the cutting side, ensuring absolute uniformity of the cutting reference. This resolves the potential conflict between multi-plane layering and the horizontal reference, ensuring that regardless of the degree to which the object to be cut has collapsed due to wind pressure, it can ultimately be cut to the preset height, avoiding excessive residual height or excessive cutting depth.

[0041] According to a second aspect of the embodiments of this specification, a lawn mowing device is provided, comprising:

[0042] The power unit is configured to provide driving force;

[0043] The walking unit, which is connected to the power unit, is configured to move the lawnmower; and

[0044] As described in the first aspect, the cutting mechanism has a cutter head body that is connected to the power unit for transmission, and the power unit drives the cutter head body to rotate so as to drive the cutting unit to perform cutting operations.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0047] Figure 1 This is a side view of the cutting mechanism shown in the embodiments of this specification;

[0048] Figure 2 yes Figure 1 Enlarged view of part A;

[0049] Figure 3 This is an isometric view of the cutting mechanism shown in the embodiments of this specification;

[0050] Figure 4 This is one of the schematic diagrams showing the mating structure of the cutter head body and the cutting unit in the embodiments of this specification;

[0051] Figure 5 This is the second schematic diagram of the cutter head body and the cutting unit's cooperative structure shown in the embodiments of this specification.

[0052] Explanation of reference numerals in the attached figures

[0053] 10. Cutter head body; 11. First mounting part; 12. Second mounting part; 13. Cutting side; 20. First cutting assembly; 21. First cutting unit; 211. First cutting point; 212. First cutting trajectory; 30. Second cutting assembly; 31. Second cutting unit; 311. Second cutting point; 312. Second cutting trajectory; 40. Power unit. Detailed Implementation

[0054] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0055] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0056] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0057] In this disclosure, terms such as "parallel," "horizontal," "vertical," and "equal" refer to parallelism, horizontality, verticality, and equality within the range of process error, not to absolute parallelism, horizontality, verticality, and equality. Process error can be within ±10% or ±5%. For example, if components are parallel to each other, located in the same horizontal plane, and perpendicular to each other in the first direction, it can be understood that the components are allowed a ±5° error range based on parallelism, or that the components are allowed a 5% height difference within the same horizontal plane, or that the angle between the two first directions can be 90°±5°.

[0058] Lawn mowing equipment is a tool used in landscaping, agricultural planting, and municipal maintenance. Driven by mechanical power, its cutting mechanism operates rapidly to trim or remove weeds and pasture in lawns, green spaces, or farmland. Compared to manual mowing, it significantly reduces labor intensity and greatly improves work efficiency and the smoothness of the cut. Currently, lawn mowing equipment typically uses a blade disc as the cutting component. Multiple blades are mounted on the edge of the blade disc. By driving the blade disc to rotate at high speed, the blades move in a circular trajectory, using the cutting edge of the cutting unit to shear the target area, thus achieving the cutting operation.

[0059] As can be seen from the background technology, in order to ensure cutting efficiency, the cutting mechanism of the lawn mowing equipment of the relevant technology requires the blade to maintain a high rotation speed. The high-speed rotating cutting unit will disturb the surrounding air and form radial outward or downward wind pressure. This wind pressure can easily bend the upright object to be cut into a tilted or even fallen state. At this time, the cutting unit can only cut the lower area of ​​the object to be cut. After the wind pressure disappears, the cut object will recover to a near-vertical state due to its own elasticity, resulting in a residual height that is much higher than the user's preset value. Moreover, the degree of falling and the recovery speed of different objects to be cut are different, which will also cause problems such as inconsistent cutting height and missed cutting of some areas, seriously affecting the quality of lawn mowing.

[0060] In view of this, this embodiment provides a cutting mechanism that sets at least two sets of cutting components containing multiple cutting units. The cutting units of different cutting components form cutting trajectories with different radii, and the cutting points of all cutting units are located on the same horizontal working plane on the cutting side 13 of the blade body 10. This solves the problems of uncontrolled cutting height and missed cutting caused by wind pressure causing the object to be cut to fall over in related technologies, and ensures that cutting accuracy and work quality are improved while maintaining grass cutting efficiency.

[0061] Please refer to the instruction manual attached. Figures 1-3 This cutting mechanism can be applied to lawn mowing equipment, specifically including a blade body 10 and at least two cutting components. The blade body 10 serves as the supporting foundation and power transmission component of the entire cutting mechanism, and is typically made of metal or engineering plastics with high structural strength. Its shape can be designed as circular, polygonal, etc., according to actual needs. Furthermore, the blade body 10 has a transmission structure (such as a rotating shaft, shaft hole, or coupling) at its center that connects to the power unit 40 of the lawn mowing equipment (such as a motor or engine). When the power unit 40 is started, the blade body 10 can rotate at high speed around its own rotation center, thereby driving the cutting components mounted on it to move synchronously.

[0062] The cutting assembly is the component that directly performs the cutting function. Each cutting assembly contains multiple cutting units, and the specific form of the cutting units can be selected according to the operational requirements. For example, it can use a blade-like blade (with a cutting edge), a linear cutting element (such as nylon rope), or a serrated cutting structure. Each cutting unit is distributed along the circumference of the cutter head body 10. The distribution method can be uniformly spaced or non-uniformly arranged according to the characteristics of the object to be cut. Furthermore, each cutting unit must meet the condition that at least a part of the cutting unit is located outside the cutter head body 10 on the axial projection plane of the cutter head body 10. That is, the cutting unit must extend outward from the edge of the cutter head body 10 to ensure that the end away from the cutter head body 10 can contact the object to be cut, avoiding the inability to cut due to obstruction by the cutter head body 10.

[0063] It should be understood that, driven by the power unit 40, the cutting units move synchronously with the rotation of the cutter head body 10, and the cutting points of each cutting unit in the same cutting assembly will form a cutting trajectory with the same cutting radius during this process. For example, if a cutting assembly contains three cutting units, and the distance from the cutting point of each cutting unit to the rotation center of the cutter head body 10 is the same (e.g., 15cm), then these three cutting units will form a circular cutting trajectory with a radius of 15cm when the cutter head rotates. However, the cutting trajectory radii of the cutting units in different cutting assemblies will differ. For example, assuming there are two cutting assemblies, the cutting trajectory radius of the first group of cutting assemblies is 15cm, while the cutting trajectory radius of the second group of cutting assemblies needs to be set to less than 15cm (e.g., 12cm). If there are three groups of cutting assemblies, they can be set to cutting radii decreasing sequentially, such as 16cm, 13cm, and 10cm, respectively.

[0064] It should be explained that the cutting point refers to the position on the cutting unit that directly contacts the object to be cut (such as grass stems, branches, etc.) and completes the cutting action, specifically located at the end of the cutting unit away from the cutter head body 10.

[0065] It should be understood that the cutting points of each cutting unit must be located on the same horizontal working plane on the cutting side 13 (i.e., the side facing the object to be cut) of the cutter head body 10. This feature can be achieved in at least two of the following ways:

[0066] 1. Taking the case where all cutting units have the same length as an example, this can be achieved by adjusting the installation position of each cutting unit on the cutter head body 10. The cutting unit that forms a larger cutting trajectory is installed at a position farther from the rotation center, and the cutting unit that forms a smaller cutting trajectory is installed at a position closer to the rotation center. The radial position difference cancels out the consistency of the cutting unit length, ensuring that all cutting points are at the same height during operation.

[0067] 2. Taking the case where each cutting unit has the same radial installation position on the cutter head body 10 (i.e., the distance to the rotation center is the same) as an example, this can be achieved by adjusting the length of the cutting unit. The length of the cutting unit that forms a larger radius cutting trajectory is set to be greater than the length of the cutting unit that forms a smaller radius cutting trajectory. The consistency of the installation position is compensated by the length difference, and the cutting point can also be placed on the same horizontal working plane.

[0068] In the above embodiments, the difference in the radius of the cutting trajectory between each cutting component is the key to achieving multi-stage cutting by the cutting mechanism, ensuring that objects with different degrees of lodging can be effectively cut. The limitation that the cutting points of each cutting unit are on the same horizontal working plane provides a unified height reference for all cutting actions, avoiding confusion in the final cutting height due to inconsistent heights of different cutting points. When the blade body 10 drives the cutting unit to rotate, different cutting components act on the objects to be cut in sequence. During the movement of the mowing equipment, the cutting component with a larger radius cutting trajectory contacts the object first and cuts it. As the mowing equipment moves forward, the cutting component with a smaller radius cutting trajectory cuts the parts missed by the previous cutting component, ultimately achieving a cutting effect that meets the preset height.

[0069] In practical applications, the number of cutting components can be adjusted according to the job requirements, such as using two, three, or four; and the number of cutting units in each cutting component can also be adjusted according to the job requirements, such as using three, four, or five. Furthermore, the number of cutting units between each cutting component can be the same or different. This implementation method does not have strict limitations or requirements.

[0070] During the operation of this cutting mechanism, the cutting unit with a larger cutting radius will first contact the upper area of ​​the object to be cut when it is lying down (because when lying down, the upper part of the object is further away from the ground and closer to the cutting trajectory with a larger radius), cutting off the upper part of the object first. At this time, due to the reduction in length, the windward area of ​​the object also decreases, and the object will return to a near-vertical state, making the cutting target area closer to the cutting height of the cutting mechanism. As the mowing equipment moves forward, the cutting unit with a smaller cutting radius will then contact the target cutting area of ​​the object. Since the cutting points of each cutting unit are on the same working plane of the cutting side 13 of the cutter head body 10, the overall cutting height of the cutting mechanism is consistent. Therefore, the object to be cut after one cut can be cut again by the cutting unit with the same cutting height in a near-vertical state, thus completing the final cut. This meets the user's requirement that the cutting height of the object to be cut matches the working height of the cutting mechanism, avoids the problem of missed cuts due to incomplete trajectory coverage, significantly improves the trimming flatness of the work scene, and eliminates the need for rework.

[0071] Please continue to refer to the instruction manual appendix. Figures 1-3 The cutting units of each cutting component are arranged alternately along the circumference of the cutter head body 10. This means that the cutting units belonging to different cutting components are distributed sequentially along the circumference of the cutter head body 10 according to the rule of non-continuous arrangement of the same cutting component. For ease of understanding, taking a cutting mechanism containing two cutting components as an example, the two cutting components are defined as the first cutting component 20 and the second cutting component 30, respectively. The cutting unit of the first cutting component 20 is defined as the first cutting unit 21, and the cutting unit of the second cutting component 30 is correspondingly defined as the second cutting unit 31. The distribution order of each cutting unit along the circumference of the cutter head body 10 is first cutting unit 21, second cutting unit 31, first cutting unit 21, second cutting unit 31… forming an alternating cyclic arrangement. If the cutting mechanism contains three cutting components (defined as the first, second, and third cutting components, respectively, and the cutting units are defined as the first, second, and third cutting units, respectively), then the distribution order is first cutting unit 21, second cutting unit 31, third cutting unit, first cutting unit 21, second cutting unit 31, third cutting unit… This avoids the problem of overlapping local cutting trajectories caused by the continuous distribution of cutting units of the same cutting component. If the cutting units of the same cutting component are continuously arranged in the circumferential direction of the cutter head body 10 (such as the first cutting unit 21, the second cutting unit 31, the second cutting unit 31, etc.), the continuous first cutting unit 21 or the second cutting unit 31 will form repeated cutting trajectories at the same radial position, which not only increases the rotational resistance of the cutter head body 10, but may also cause uneven residual height of the object to be cut due to excessive local cutting.

[0072] Furthermore, based on the above layout, the included angle between any two adjacent cutting units in the circumferential direction of the cutter head body 10 is equal, thus satisfying the condition that the total circumferential angle (360°) of the cutter head body 10 is divided by the total number of all cutting units. For example, when the first cutting assembly 20 contains three first cutting units 21 and the second cutting assembly 30 contains three second cutting units 31, and the total number of cutting units is six, the included angle between adjacent cutting units is 360°, while the included angle between any two adjacent first cutting units 21 and second cutting units 31 is 60°.

[0073] It should be noted that only by ensuring that the cutting units of different cutting components are arranged alternately and then distributed at equal angles can the cutting trajectory form a uniform and gap-free coverage on the circumference, avoiding the problem of some cutting areas having too dense cutting units and others having too sparse cutting units due to unequal angles.

[0074] In summary, this implementation method, through the alternating arrangement and equal angle distribution of cutting units, ensures that cutting units with different cutting radii are evenly and orderly distributed on the circumference, guaranteeing that the cutting trajectory has no overlap or blind spots, ensuring uniform coverage of the entire circumference, reducing the risk of missed cuts, stabilizing the rhythm of the cutting action, avoiding excessive local cutting, adapting to different types of cutting units and the number of cutting components, and improving the applicability of the cutting mechanism to different operating scenarios.

[0075] Taking an embodiment with two cutting components, namely a first cutting component 20 and a second cutting component 30, wherein the first cutting component 20 includes three first cutting units 21 and the second cutting component 30 includes three second cutting units 31 as an example.

[0076] like Figure 1 , Figure 3 As shown above, the first cutting unit 21 and the second cutting unit 31 are alternately arranged in the circumferential direction of the cutter head body 10, and the included angle between any adjacent first cutting unit 21 and second cutting unit 31 is equal. Throughout the process, the three-plus-three cutting unit configuration avoids both the problem of excessively large cutting intervals and increased risk of missed cuts caused by too few cutting units, and the problem of increased structural complexity and rotational resistance of the cutter head body 10 caused by too many cutting units, achieving a good balance between cutting trajectory coverage density and structural simplification. Furthermore, the symmetrical distribution of the six cutting units along the circumferential direction ensures that the centrifugal force during the rotation of the cutter head body 10 is evenly distributed, reducing vibration or uneven wear caused by uneven mass distribution and extending the lifespan of the mowing equipment.

[0077] Correspondingly, the cutter head body 10 is provided with a plurality of first mounting parts 11 and a plurality of second mounting parts 12. The number of first mounting parts 11 and second mounting parts 12 can be set to correspond to the number of first cutting units 21 and second cutting units 31, respectively, or the number can be set to be greater than the number of first cutting units 21 and second cutting units 31.

[0078] In one embodiment, the first mounting portion 11 and the second mounting portion 12 are matched with the first cutting unit 21 and the second cutting unit 31 of the same length to realize the adjustment logic of the cutting radius by substituting the difference in the length of the cutting units for the difference in the mounting position. It should be noted that in this embodiment, the first mounting portion 11 and the second mounting portion 12 are distributed in concentric circles with the rotation center of the cutter head body 10 as the center. All the first mounting portions 11 are located on the same circumference (i.e., the first circumference), and all the second mounting portions 12 are located on another circumference (i.e., the second circumference). The radius of the first circumference (the distance from the first mounting portion 11 to the rotation center) is greater than the radius of the second circumference (the distance from the second mounting portion 12 to the rotation center). In order to correspond to the layout requirement of the first cutting unit 21 and the second cutting unit 31 being alternately distributed in the circumferential direction of the cutter head body 10, the first mounting portion 11 and the second mounting portion 12 are also equally spaced and alternately distributed in the circumferential direction of the cutter head body 10, and the first mounting portion 11 and the second mounting portion 12 are staggered in the radial direction of the cutter head body 10.

[0079] Since the first cutting unit 21 and the second cutting unit 31 have the same length, after the first cutting unit 21 is installed on the first mounting part 11 and the second cutting unit 31 is installed on the second mounting part 12, the larger radius of the circumference of the first mounting part 11 directly results in the cutting trajectory radius of the first cutting unit 21 being greater than that of the second cutting unit 31. There is no need to adjust the cutting radius by changing the length of the cutting unit itself, thus unifying the specifications of the cutting units and avoiding the trouble of producing and sorting units of different lengths separately. The disordered arrangement of the cutting units due to the chaotic position of the mounting part will not disrupt the uniform coverage of the cutting trajectory.

[0080] In specific application scenarios, this embodiment can flexibly adjust the structure of the mounting parts (first mounting part 11, second mounting part 12) and the type of cutting units according to different mowing needs. For example, the blade body 10 can be made of aluminum alloy with a diameter of 25cm. The three first mounting parts 11 are designed as threaded holes on the first circumference with a radius of 10cm, and the three second mounting parts 12 are also threaded holes on the second circumference with a radius of 7cm. Any adjacent threaded holes are alternately distributed along the circumference and radially offset by 30°. The first and second cutting units 31 can both be made of manganese steel flat blades with a length of 5cm and a thickness of 1mm. One end of the blade has a positioning hole that matches the threaded hole and is fixed to the corresponding mounting part by bolts. At this point, the radius of the cutting point trajectory of the first cutting unit 21 is 15cm (the sum of the installation radius and the blade extension length), and the radius of the trajectory of the second cutting unit 31 is 12cm. The 3cm radius difference can effectively cope with the slight lodging of lawn grass caused by wind pressure. The screw hole type installation part is firmly connected, and the sharpness of the manganese steel blade can ensure a smooth cut, which is suitable for the low-load, high-frequency use needs of household lawnmowers. For example, the blade body 10 can be made of cast steel. The first installation part 11 and the second installation part 12 are respectively set as three L-shaped buckle seats. The buckle seats have built-in elastic claws to achieve quick fixation. The cutting unit can be made of alloy serrated blades. One end of the blade has a protruding block, which can be directly inserted into the buckle seat and fixed by the elastic claws. The tooth structure of the alloy serrated blade can enhance the biting force on the object to be cut and avoid slippage. The buckle installation can quickly replace the blade without tools, which greatly reduces the downtime for changing blades in commercial lawnmowers and improves the efficiency of large-area operation.

[0081] like Figure 5 As shown, as an optional implementation, the first mounting part 11 and the second mounting part 12 can also be arranged in a circumferential configuration. To ensure that the first cutting unit 21 and the second cutting unit 31 can form cutting trajectories with different cutting radii on the cutter head body 10, the lengths of the first cutting unit 21 and the second cutting unit 31 need to differ accordingly; that is, the length of the first cutting unit 21 is greater than or less than the length of the second cutting unit 31. Transferring the difference in cutting radii from the mounting structure of the cutter head body 10 to the specifications of the cutting unit itself simplifies the machining of the cutter head body 10 and improves the flexibility of replacing the cutting unit.

[0082] Specifically, in this embodiment, the distances from the first mounting part 11 and the second mounting part 12 to the rotation center of the cutter head body 10 are completely equal. This eliminates the need to machine the mounting parts at different radial positions on the cutter head body 10, directly simplifying the machining process. Only uniformly distributed mounting positions need to be opened on the same circumference, avoiding the weakening of the cutter head material strength by different radial mounting parts (e.g., stress concentration due to multiple radial openings), while also reducing machining accuracy requirements (no need to calibrate the deviations of mounting parts in different radial directions). The difference in the radius of the cutting trajectory is entirely achieved by the length difference between the first and second cutting units 31. After the cutting units are installed, since the circumferential radius of each mounting part is fixed, the longer cutting unit extends beyond the edge of the cutter head body 10, resulting in a larger cutting point trajectory radius. The shorter cutting unit corresponds to a smaller trajectory radius. This allows the same cutter head body 10 to adjust the trajectory radius difference by replacing cutting units of different lengths, adapting to objects of different heights without replacing the entire cutter head, significantly improving the practicality and economy of the cutting mechanism.

[0083] In one embodiment, the shortest distance between the cutting trajectories of any two adjacent cutting components on the cutting side 13 is greater than or equal to 10mm, so as to avoid cutting interference caused by the trajectories being too close, and at the same time reserve space for the posture restoration of the object to be cut.

[0084] For ease of understanding, such as Figure 1 As shown, the distance α between the first cutting point 211 of the first cutting unit 21 with a larger cutting radius on the cutting side 13 of the cutter head body 10 and the second cutting point 311 of the second cutting unit 31 with a smaller cutting radius on the cutting side 13 of the cutter head body 10 is greater than or equal to 10 mm. This can also be understood as the distance between the first cutting trajectory 212 formed by the first cutting unit 21 and the second cutting trajectory 312 formed by the second cutting unit 31 being greater than or equal to 10 mm. This minimum distance of 10 mm ensures that the first cutting assembly 20 and the second cutting assembly 30 have sufficient physical space to act sequentially on the object to be cut, avoiding the cutting units from continuously cutting in the same area due to the trajectories being too close.

[0085] Specifically, when the cutter head body 10 drives the cutting unit to rotate, the object to be cut will fall over due to wind pressure, and the object will be in a posture where the lower part is close to the ground and the upper part is tilted outward. The larger the tilt angle, the farther the upper part is from the ground radially. The spacing between adjacent cutting trajectories is greater than or equal to 10mm, which allows the cutting unit of the large radius cutting trajectory to contact the upper part of the object to be cut in the fallen state first. After cutting, the object to be cut will gradually return to vertical due to the reduction of the weight at the top. A certain radial space is required during its recovery process. If the distance between the cutting points of the cutting components is less than 10mm, the cutting unit of the smaller radius cutting trajectory may reach the area before the object to be cut is fully recovered, resulting in the cutting point being too high (not cutting to the preset height). However, a distance between the cutting points of the cutting components greater than or equal to 10mm provides sufficient radial buffer for the recovery of the object to be cut. For example, when the distance is 10mm, after the larger radius cutting trajectory is cut, the object to be cut can recover about 10mm inward, just entering the cutting range of the smaller radius cutting trajectory. At this time, the cutting point falls exactly on the preset horizontal working plane, ensuring accurate cutting height.

[0086] Meanwhile, this spacing limit can also avoid airflow interference between cutting units. The high-speed rotating cutting unit will drive the surrounding air to form airflow. If the distance between adjacent tracks is too close, the airflow of the two cutting tracks will overlap to form turbulence, which will aggravate the collapse of the object to be cut. The aforementioned limited spacing can make the airflow of each cutting track relatively independent, reduce mutual interference, maintain the airflow stability of the cutting area, and indirectly improve the cutting accuracy.

[0087] In one embodiment, based on any implementation, the difference in the radii of the cutting trajectories of adjacent cutting components is directly proportional to the feed speed of the cutter head body 10 toward the cutting side 13. It should be understood that the difference in the radii of the cutting trajectories of adjacent cutting components refers to the radial distance between two cutting trajectories with adjacent radii (e.g., a 0.5cm difference between cutting trajectories with a cutting radius of 16cm and 15.5cm); while the feed speed of the cutter head body 10 toward the cutting side 13 refers to the speed at which the mowing device drives the cutter head body 10 along the area to be cut (e.g., five kilometers per hour, three kilometers per hour, etc.). The direct proportionality means that when the feed speed increases, the radius difference must increase synchronously, and when the feed speed decreases, the radius difference must decrease synchronously (for example, the radius difference is 0.1cm when the feed speed is three kilometers per hour, and increases to 0.5cm when the speed increases to five kilometers per hour). This proportional relationship provides sufficient radial buffer space to match the recovery time and movement distance of the object to be cut. When the feed speed of the cutter head body 10 is fast, the distance the cutter head body 10 moves forward per unit time is greater. After the object to be cut is cut by the cutting unit of the larger radius cutting trajectory, the speed of movement with the cutter head body 10 increases, leaving less time for the object to recover its vertical posture. At this time, if the difference in radius between adjacent cutting trajectories is too small, the object to be cut will reach the area of ​​the smaller radius cutting trajectory before it has fully recovered, and the cutting point will still be too high. Increasing the radius difference allows the larger radius cutting trajectory to cut the fallen part of the object to be cut earlier, leaving more radial recovery space for the object to be cut, ensuring that when the smaller radius cutting trajectory cuts the object to be cut, the object to be cut is already close to vertical, and the cutting point falls on the preset working plane. Conversely, when the feed speed is slow, the cutter head body 10 moves smoothly, and the object to be cut has more time to recover after being cut by the larger radius cutting trajectory. At this time, there is no need for a large radius difference between adjacent cutting trajectories, so as to avoid over-cutting of the larger radius cutting trajectory due to a large radius difference, and also to prevent the time interval between secondary cutting from being too long, which would affect the work efficiency.

[0088] Please continue to refer to the instruction manual appendix. Figure 1 As an optional implementation, the cutter head body 10 is inclined downward toward the horizontal plane from its rotation center toward the cutting side 13, and the inclination angle β (the angle between the cutter head body 10 and the horizontal plane) is 3-5°. By setting the cutter head body 10 to be inclined downward toward the front of the cutting equipment, the influence of the wind pressure generated by the rotation of the cutter head body 10 on the object to be cut is reduced.

[0089] Specifically, a 3-5° tilt angle reduces the pushing effect of the cutter head body 10 on the object to be cut during rotation. When the cutter head body 10 is horizontally set, during its rotation, the disc surface pushes airflow onto the object to be cut below, easily bending the object, including the cutting side 13. However, with the cutter head body 10 tilted as described above, the airflow direction is more biased towards the rear of the cutting side 13 (rather than vertically downward) during rotation. This reduces the normal pressure of the airflow on the object to be cut, making it easier for the object to remain upright, thereby improving the working effect of the cutting mechanism.

[0090] It should be noted that the angle between the cutter head body 10 and the horizontal plane is constrained to 3-5° to balance the cutting effect of the cutting mechanism. When the tilt angle of the cutter head body 10 is less than 3°, the tilting effect is weak, the airflow is still relatively dispersed, and there is still a strong pushing effect on the object to be cut, which is not much different from a horizontal cutter head. However, when the tilt angle of the cutter head body 10 is greater than 5°, the height difference between the edge of the cutter head body 10 and its rotation center is too large. On the one hand, this will increase the length difference of the cutting unit, leading to structural instability. On the other hand, excessive tilting will cause a sharp increase in air resistance when the cutter head rotates, increasing the load on the power unit 40, and may even cause the cutter head to vibrate, affecting the cutting accuracy.

[0091] Based on the above implementation methods, please continue to refer to the appendix of the instruction manual. Figure 1 Each cutting component is positioned on a different cutting plane along the axial direction of the cutter head body 10, while ensuring that the cutting trajectory radius formed by the cutting units within the same cutting plane is consistent. This compensates for the height deviation of the cutting point caused by the tilt of the cutter head through the height difference of the axial plane, retains the advantage of reducing airflow bending brought by the tilted cutter head body 10, and simultaneously achieves the core requirement that all cutting points are located on the same horizontal working plane.

[0092] As can be seen in the above embodiments, the cutter head body 10 is tilted downwards by 3-5° relative to the horizontal plane towards the cutting side 13. This will result in a vertical height difference between the mounting planes at different radial positions. If all cutting components are located in the same axial plane of the cutter head body 10, the cutting units (cutting trajectories with larger radii) that are far from the edge of the cutter head body 10 will be closer to the ground due to the tilt of the cutter head body 10, while the cutting units (cutting trajectories with smaller radii) that are close to the edge of the cutter head body 10 will be relatively higher. The cutting points cannot be coplanar. By setting the cutting components on different axial planes, this height difference can be actively compensated.

[0093] Specifically, such as Figure 1As shown, the cutting components corresponding to the larger radius cutting trajectory (corresponding to the first cutting unit 21 and the first cutting point 211) are set in a slightly higher axial plane, while the cutting components corresponding to the smaller radius cutting trajectory (corresponding to the second cutting unit 31 and the second cutting point 311) are set in a slightly lower axial plane. By adjusting the axial height in the opposite direction, the radial height difference caused by the tilt of the cutter head is offset, ultimately allowing the cutting points of all cutting units to converge on the same horizontal working plane. Simultaneously, the consistent cutting trajectory radius formed by the cutting units on the same cutting plane avoids cutting overlap or blind spots caused by chaotic cutting trajectories within a single layer, ensuring stable and orderly cutting in each layer.

[0094] Based on the above-described implementation where the cutting components are respectively arranged on different cutting planes along the axial direction, the cutting trajectory radius formed by the cutting units on different cutting planes decreases sequentially from top to bottom along the axial direction of the cutter head body 10. That is, as mentioned above, along the axial direction from away from the ground to near the ground, the cutting trajectory radius formed by the cutting unit on the upper cutting plane (away from the ground) (corresponding to the first cutting unit 21) is larger, and the cutting trajectory radius formed by the cutting unit on the lower cutting plane (near the ground) (corresponding to the second cutting unit 31) is smaller. This ensures that all cutting points are located on the same horizontal working plane on the cutting side 13. Through precise matching of the axial height difference and the radial radius difference, the spatial deviation caused by the cutter head tilt is offset, while strengthening the timing logic of the multi-stage cutting.

[0095] Based on the above implementation, in one optional embodiment, the axial spacing between cutting units in any two adjacent cutting planes in the axial direction of the cutter head body 10 is greater than or equal to 0.5mm. On the basis of avoiding spatial overlap of cutting units caused by height difference design, it further ensures that the regularity of the cutting radius distribution can be accurately converted into the coplanar effect of cutting points, and that the cutting trajectory of a certain plane will not be unable to completely cover the area to be cut due to mutual occlusion or collision of units.

[0096] It should be noted that the values ​​greater than or equal to 0.5mm are reasonable thresholds based on the conventional design parameters of the cutting mechanism. From the perspective of mechanical safety, 0.5mm can accommodate the combined effects of normal vibrations during high-speed rotation of the cutting unit and manufacturing and assembly tolerances, leaving sufficient safety margin to avoid collision risks. From the perspective of precision assurance, a 0.5mm spacing will not cause excessive height differences between the cutting planes due to excessive size, thereby increasing the difficulty of cutting radius compensation, nor will it cause the aforementioned interference problems due to excessive size, thus achieving a balance between safety and precision.

[0097] This embodiment also provides a lawn mowing device, which mainly includes a power unit 40, a walking unit, and a cutting mechanism as provided in any of the above embodiments. The power unit 40 serves as the overall power source, and its quantity can be set to more than one to ensure that the power unit 40 can provide the walking unit with the power to move while simultaneously providing the cutting mechanism with the power to rotate the blade body 10. The walking unit drives the cutting device to move along the area to be mowed, achieving continuous operation and coverage. The cutting mechanism performs the cutting action under the drive of the power unit 40.

[0098] The power unit 40 can be, but is not limited to, an electric power unit 40 (such as a DC brushless motor, an AC asynchronous motor, etc.) and an internal combustion engine power unit 40 (such as a gasoline engine, a diesel engine, etc.). The travel unit can be, but is not limited to, a wheeled travel unit (such as a combination of multiple wheels), a tracked travel unit, and a wheel-tracked hybrid travel unit.

[0099] In summary, the lawn mowing equipment of this embodiment achieves integrated mobile cutting operations through the coordinated action of the power unit 40, the walking unit, and the cutting mechanism. The power unit 40 provides suitable power output, the walking unit ensures that the lawn mowing equipment stably covers the area to be mowed, and the cutting mechanism, with its optimized design such as multi-stage cutting and tilting blade body 10, effectively addresses issues such as wind pressure lodging and inconsistent cutting heights, ensuring that the lawn mowing equipment can achieve efficient and precise mowing operations under different needs.

[0100] Other embodiments of this specification will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models claimed herein. This specification is intended to cover any variations, uses, or adaptations that follow the general principles of this specification and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this specification are indicated by the following claims.

[0101] It should be understood that this specification is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is limited only by the appended claims.

[0102] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A cutting mechanism, characterized in that, Applied to lawn mowing equipment, the cutting mechanism includes: The cutter head body; and At least two cutting components, each of which includes a plurality of cutting units, each of which is distributed around the circumference of the cutter head body, and at least a portion of the cutting unit is located outside the cutter head body on the axial projection plane of the cutter head body, and the cutting unit has a cutting point at its end away from the cutter head body; The blade body is configured to rotate under the drive of the power unit of the mowing equipment and drive the cutting unit to move synchronously. The cutting points of each cutting unit in the same cutting assembly form a cutting trajectory with the same cutting radius, and the cutting points of the cutting units in different cutting assemblies form a cutting trajectory with different cutting radii. The side of the cutter head body facing the object to be cut is the cutting side, and the cutting point of each cutting unit can move along its respective cutting trajectory in the working plane at the same horizontal height on the cutting side.

2. The cutting mechanism according to claim 1, characterized in that, The cutting units of each of the cutting assemblies are arranged alternately in the circumferential direction of the cutter head body; and The included angle between any two adjacent cutting units is equal.

3. The cutting mechanism according to claim 2, characterized in that, The cutting assembly includes a first cutting assembly and a second cutting assembly. The first cutting assembly includes three first cutting units, and the second cutting assembly includes three second cutting units. The first cutting unit and the second cutting unit are arranged alternately in the circumferential direction of the cutter head body, and the included angle between any adjacent first cutting unit and second cutting unit is equal.

4. The cutting mechanism according to claim 3, characterized in that, The cutter head body is provided with a plurality of first mounting portions and a plurality of second mounting portions; the first mounting portions and the second mounting portions are arranged concentrically with the rotation center of the cutter head body, the distance from the first mounting portion to the rotation center of the cutter head body is greater than the distance from the second mounting portion to the rotation center of the cutter head body, the first mounting portions and the second mounting portions are equally spaced and alternately distributed along the circumferential direction of the cutter head body, and the first mounting portions and the second mounting portions are staggered in the radial direction of the cutter head body; The first cutting unit and the second cutting unit have the same length; the first cutting unit is mounted on the first mounting part, and the second cutting unit is mounted on the second mounting part, so that the cutting points of the first cutting unit and the second cutting unit form cutting trajectories with different cutting radii.

5. The cutting mechanism according to claim 3, characterized in that, The cutter head body is provided with a plurality of first mounting portions and a plurality of second mounting portions; the first mounting portions and the second mounting portions are equally spaced and alternately distributed along the circumferential direction of the cutter head body, and the distance between each first mounting portion and the rotation center of the cutter head body is equal to the distance between each second mounting portion and the rotation center of the cutter head body. The length of the first cutting unit is greater than or less than the length of the second cutting unit; The first cutting unit is mounted on the first mounting part, and the second cutting unit is mounted on the second mounting part, so that the cutting points of the first cutting unit and the second cutting unit form cutting trajectories with different cutting radii.

6. The cutting mechanism according to claim 1, characterized in that, The difference in radius of the cutting trajectory formed by any two adjacent cutting components is proportional to the feed speed of the cutter head body toward the cutting side.

7. The cutting mechanism according to claim 1, characterized in that, The cutter head body is inclined downwards on the horizontal plane from its rotation center toward the cutting side, and the angle between the cutter head body and the horizontal plane is 3-5°.

8. The cutting mechanism according to claim 7, characterized in that, Each of the cutting components is arranged in a different cutting plane along the axial direction of the cutter head body, and the cutting units located on the same cutting plane have the same cutting radius.

9. The cutting mechanism according to claim 8, characterized in that, The cutting radius formed by the cutting units located in different cutting planes decreases sequentially from top to bottom along the axial direction of the cutter head body.

10. A lawn mowing device, characterized in that, include: The power unit is configured to provide driving force; The walking unit is connected to the power unit and is configured to drive the lawn mowing equipment to move. as well as The cutting mechanism as described in any one of claims 1-9, wherein the cutter head body of the cutting mechanism is connected to the power unit in a transmission connection, and the power unit drives the cutter head body to rotate so as to drive the cutting unit to perform cutting operations.

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