Mowing device

Abstract

The utility model provides a mowing device which comprises a machine shell and a height adjusting mechanism, and a mowing assembly is arranged in a machine cavity. The area inside the machine cavity is a mowing area, and the area outside the machine cavity is a non-mowing area; the height adjusting mechanism is in driving connection with the mowing assembly; at least the air supplement part is provided with an air supplement inlet and an air supplement outlet; the air supplement inlet is located in at least one surface of the other surfaces, except the bottom surface, of the machine shell. The air supplement outlet is located in at least one position of the cavity wall face of the machine cavity, the cavity top face of the machine cavity and the bottom surface, located in the non-mowing area, of the machine shell. The machine cavity is provided with a grass outlet; the airflow speed of air discharged from the air supplement outlet is smaller than that of air discharged from the grass discharge port. The utility model solves the problem that the grass suction efficiency and the grass discharge efficiency of the mower are seriously influenced by the reduction of the speed of air entering the cavity of the mower due to the great reduction of the sectional area of the air inlet duct under the conditions of low-gear cutting height and high-density lawns in the mower in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of greening equipment technology, and more specifically, to a grass-cutting device. Background Technology

[0002] Traditional lawnmowers rely on the negative pressure generated by rotating blades during operation to supplement airflow within the machine cavity, allowing for the effective intake and expulsion of cut grass clippings. However, during mowing, when the operator sets a traditional lawnmower to a low cutting height, the bottom of the mower is closer to the ground, significantly reducing the cross-sectional area of ​​the air intake duct. This is especially problematic with dense lawns, where the dense vegetation further obstructs airflow, making it more difficult for air to enter the machine cavity through the limited space. This results in a sharp decrease in the wind speed entering the cavity, directly weakening the suction force generated by the rotating blades. In this situation, not only does the blades need to overcome resistance when cutting short, thick vegetation, but the ability to quickly and effectively expel cut grass clippings from the machine is also reduced.

[0003] Because the efficiency of lawnmowers in both suction and discharge is severely affected by the aforementioned reasons, this often leads to the accumulation of residue inside the machine cavity, reducing overall operating efficiency and forcing users to frequently stop to clean the machine's interior. Furthermore, reduced airflow can also increase the engine's load, accelerate mechanical wear, and increase fuel or electricity consumption. Therefore, there is an urgent need to develop a lawnmower device that enhances air intake and optimizes internal airflow, improving the machine's ability to adapt to different working environments (such as vegetation of varying densities and heights) to ensure continuous, stable, and efficient lawnmower operations. Utility Model Content

[0004] The main purpose of this utility model is to provide a lawn mowing device to solve the problem that in the existing technology, when the lawn mower is at a low cutting height and on a high-density lawn, the cross-sectional area of ​​the air inlet duct is greatly reduced, resulting in a decrease in the wind speed entering the machine cavity, which seriously affects the lawn mower's grass suction and discharge efficiency.

[0005] To achieve the above objectives, according to one aspect of the present invention, a mowing device is provided, comprising a housing and a height adjustment mechanism. The housing has a cavity, within which a rotatable mowing component is disposed. The area within the cavity is the mowing area, and the area outside the cavity is the non-mowing area. The height adjustment mechanism is drivenly connected to the mowing component. The mowing device further includes an air supply unit, at least having a connected air supply inlet and an air supply outlet. The air supply inlet is located at at least one of the surfaces of the housing other than the bottom surface. The air supply outlet is located at at least one position on the cavity wall, the top surface of the cavity, and the bottom surface of the housing in the non-mowing area. The cavity has a grass discharge outlet. The airflow velocity at the air supply outlet is less than the airflow velocity at the grass discharge outlet.

[0006] This configuration, by placing the supplemental air inlet on at least one of the surfaces of the housing (excluding the bottom surface) and the supplemental air outlet at at least one location on the cavity wall, the top surface of the cavity, and the bottom surface of the housing in the non-mowing area, provides additional airflow paths for the mowing device's cavity. This significantly mitigates the problem of reduced cross-sectional area of ​​the main air inlet caused by direct contact with the ground. Especially when the mowing device is operating at low speeds, a continuous and sufficient airflow can still enter the cavity, helping to create a higher rotating negative pressure, thereby increasing the suction force generated at the blades. More effective suction improves the rapid collection and transfer of cut grass clippings to the outlet. In addition, by setting the airflow velocity at the supplementary air outlet to be lower than the airflow velocity at the grass discharge outlet, additional airflow is provided through the supplementary air outlet as auxiliary airflow, which helps to promote the flow of air in the machine cavity. This ensures that the dominant airflow is still focused on quickly pushing the cut vegetation to the discharge outlet, further improving the collection efficiency of grass clippings and ensuring that they are discharged in an orderly and unobstructed manner. This not only improves the mowing efficiency but also reduces the risk of blockage.

[0007] In one embodiment, the supplemental air outlet is located on the cavity wall and / or cavity top surface of the machine cavity, and the supplemental air outlet is located at a position that avoids a preset angle range from the grass discharge port on the cavity wall and / or cavity top surface of the machine cavity; and / or, the supplemental air outlet is located in a non-mowing area, and the supplemental air outlet is located at a position that avoids a preset angle range from the grass discharge port in the non-mowing area.

[0008] This configuration avoids adverse interference with the main exhaust process. It ensures that airflows from different directions can work together rather than conflict with each other, which helps prevent interference between the airflow from the supplementary air outlet and the airflow from the straw removal chamber. This ensures that the airflow from the supplementary air outlet can better blend with the airflow from the straw removal chamber, improving overall suction power and straw delivery efficiency.

[0009] In one embodiment, a coordinate axis is formed with the cutting axis of the mowing assembly as the axis of the coordinate axis, the forward direction of the mowing device as the Y-axis, and the direction perpendicular to the forward direction of the mowing device as the X-axis; wherein, the supplementary air outlet is located on the cavity wall and / or cavity top surface of the machine cavity, and the supplementary air outlet is located at at least one position on the cavity wall and / or cavity top surface of the machine cavity within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis; and / or, the supplementary air outlet is located in the non-mowing area, and the supplementary air outlet is located at at least one position in the non-mowing area within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis.

[0010] This design ensures that the airflow from the supplementary air outlet can better blend with the airflow expelling grass clippings within the machine cavity, improving overall suction power and grass clipping removal efficiency; furthermore... Figure 6 The angle range G in the coordinate system represents the range of 20° to 160° in the counterclockwise direction of the coordinate axes. Figure 6 The angle range H in the coordinate system represents the range of 200° to 340° in the counterclockwise direction of the coordinate axis.

[0011] In one embodiment, the air outlet plane where the make-up air outlet is located and the cavity opening plane where the cavity opening is located have a first included angle A, and the value of the first included angle A is in the range of 0~180°.

[0012] This setting, by reasonably optimizing the range of the first included angle A, avoids the air blown out of the air supply outlet from not being effectively blown into the machine cavity due to the range of the first included angle A being too large or too small, thereby ensuring that the external airflow can be effectively introduced into the machine cavity.

[0013] In one embodiment, when the air supply outlet is located at at least one of the cavity wall surface and the cavity top surface of the machine cavity, the air outlet direction of the air supply outlet has a second included angle B with the tangential direction of the airflow flowing through the air supply outlet in the machine cavity, and the value of the second included angle B is in the range of 0~180°.

[0014] This configuration, by reasonably optimizing the range of the second included angle B, ensures that the external airflow introduced by the air supply outlet can be well integrated with the airflow for venting straw inside the machine cavity, thereby forming a strong airflow.

[0015] In one embodiment, at least one of the air outlet direction and the air outlet cross-sectional area is adjustable.

[0016] This configuration, by adjusting at least one of the air outlet direction and cross-sectional area of ​​the supplementary air outlet, allows the mowing device to quickly adjust the airflow path according to different mowing environments and needs. This optimizes the airflow within the machine cavity, further improving wind circulation and mowing efficiency. Furthermore, adjusting the air outlet cross-sectional area controls the airflow speed and volume of the supplementary air, helping to precisely control the amount of air entering the machine cavity and enhancing the negative pressure environment within the blade's working area. This better adapts to the cutting requirements of different grass species and heights, ensuring mowing results and enabling the mowing device to better suit mowing tasks, improving mowing quality and efficiency.

[0017] In one embodiment, the air outlet direction and air outlet cross-sectional area of ​​the make-up air outlet are set to be non-adjustable.

[0018] This design helps reduce the difficulty of manufacturing the air supply outlet of the lawn mower, thereby reducing the manufacturing cost of the lawn mower.

[0019] In one embodiment, when the housing is a single-layer housing, the air supply section is a first through-hole structure penetrating the housing. One axial end of the first through-hole structure penetrates the outer surface of the housing to form an air supply inlet, and the other axial end of the first through-hole structure penetrates the inner surface of the housing to form an air supply outlet. Alternatively, when the housing is a single-layer housing, the air supply section is a first air guide structure disposed on the housing. The first air guide structure has a first ventilation cavity and an air supply inlet and an air supply outlet communicating with the first ventilation cavity. Alternatively, when the housing is a double-layer housing... In the case of a second through-hole structure penetrating the casing, one axial end of the second through-hole structure penetrates the outer layer of the casing to form a makeup air inlet, and the other axial end of the second through-hole structure penetrates the inner layer of the casing to form a makeup air outlet. A makeup air duct connecting the makeup air inlet and the makeup air outlet is formed between the outer and inner layers of the casing. Alternatively, when the casing is a double-layer casing, the makeup air section is a second air guide structure installed on the casing. The second air guide structure has a second ventilation cavity and a makeup air inlet and a makeup air outlet communicating with the second ventilation cavity.

[0020] With this design, since the casing is a single-layer casing, only the first through-hole structure needs to be directly opened on one side of the casing. This allows the two ends of the first through-hole structure to form a make-up air inlet and a make-up air outlet, respectively. This simplifies the structure of the make-up air section, reduces manufacturing costs, and ensures sufficient make-up air volume. It is suitable for various types of lawn mowing devices, whether manual or automatic. In addition, the design of the first through-hole structure not only reduces the manufacturing cost of the lawn mowing device, but also simplifies the maintenance and cleaning process of the make-up air section, improving the economy and ease of maintenance of the equipment.

[0021] Furthermore, by setting a first air guide structure on the casing, which includes a first ventilation chamber and a supplementary air inlet and outlet connected to the first ventilation chamber, the overall structure of the mowing device remains relatively simple. Only the addition of the first air guide structure is needed to introduce external airflow into the chamber. In addition, this design allows the supplementary air section to more effectively direct airflow towards the mowing area, improving the efficiency of grass clipping collection. Simultaneously, the first air guide structure also protects the mowing components, making it suitable for operation on uneven terrain. The introduction of the first air guide structure not only enhances airflow circulation in the mowing area and improves grass clipping collection, but also prevents direct contact between the mowing components and the ground when the mowing device traverses uneven terrain, reducing wear and damage and ensuring long-term stable operation of the mowing components and consistent mowing results.

[0022] Furthermore, since the housing is a double-layered housing, a second through-hole structure is opened on the housing, so that one axial end of the second through-hole structure penetrates the outer layer of the housing to form a makeup air inlet, and the other axial end of the second through-hole structure penetrates the inner layer of the housing to form a makeup air outlet. A makeup air duct is formed between the outer layer and the inner layer of the housing to connect the makeup air inlet and the makeup air outlet, ensuring the reliability of the connection between the makeup air inlet and the makeup air outlet through the makeup air duct, thereby ensuring the reliability of the introduction of external airflow into the housing cavity.

[0023] Furthermore, by setting a second air guide structure on the casing, which has its own second ventilation cavity and a supplementary air inlet and outlet connected to the second ventilation cavity, the overall structure of the mowing device is kept relatively simple. At the same time, the purpose of introducing external airflow into the machine cavity can be achieved simply by adding the second air guide structure.

[0024] In one embodiment, with the cavity opening plane as a reference, the air outlet plane of the supplementary air outlet is located below the horizontal plane where the cutting blade of the mowing assembly is furthest from the reference.

[0025] This configuration ensures that the airflow introduced into the machine cavity from the supplementary air outlet serves as an auxiliary airflow and does not affect the airflow used by the cutting blades to cut the grass during rotation. It promotes airflow within the machine cavity, allowing the dominant airflow to focus on quickly pushing the cut vegetation to the outlet, further improving the efficiency of grass clipping collection and ensuring that the clippings are discharged in an orderly and unobstructed manner.

[0026] In one embodiment, the air supply unit is an air supply fan installed on the housing, which has an air supply inlet and an air supply outlet.

[0027] This configuration, through the addition of a supplementary air fan, enables the active introduction of external airflow into the machine cavity. This design significantly enhances the airflow exchange efficiency between the inside and outside of the machine cavity and allows for adjustable supplementary airflow, enabling the device to flexibly adjust the internal airflow intensity according to actual working conditions and environmental requirements. Simultaneously, the active supplementary airflow system comprehensively reduces the load on the mowing components, minimizing additional energy consumption. Furthermore, by maintaining smooth airflow inside and outside the equipment, it also reduces mechanical wear caused by poor airflow during mowing, extending the equipment's lifespan.

[0028] In one embodiment, a valve structure is provided at the air supply outlet, and the valve structure is installed on the housing to adjust at least one of the air supply outlet direction and air supply cross-sectional area.

[0029] This configuration, along with the valve structure, ensures the reliability of adjusting at least one of the air outlet direction and cross-sectional area of ​​the air supply outlet, thereby ensuring that the mowing device provided in this application can be applied to a wider range of mowing scenarios.

[0030] In one embodiment, the air supply unit further includes a closing drive structure, which is disposed on the housing and is driven to be connected to the valve structure to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet.

[0031] This configuration, through the setting of a closed drive structure, drives at least one of the following: airflow direction, airflow cross-sectional area, and airflow velocity of the valve structure at the air supply outlet. This allows for variable adjustment of the airflow direction and airflow cross-sectional area, giving the equipment greater adaptability. It can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0032] In one embodiment, the air supply unit further includes a first linkage component, which is used to connect the valve structure and the height adjustment mechanism. The first linkage component drives the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet according to the height adjustment parameters of the height adjustment mechanism.

[0033] With this configuration, as the height adjustment mechanism adjusts the distance between the rotating surface of the cutting blade of the mowing assembly and the ground, the first linkage component can promptly drive the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area according to the height adjustment parameters of the height adjustment mechanism. This ensures that when the distance between the rotating surface of the cutting blade and the ground changes, at least one of the corresponding air outlet direction and air outlet cross-sectional area will make an adaptive change, thereby achieving variable adjustment of airflow direction and air outlet cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, improving overall work efficiency.

[0034] In one embodiment, the mowing assembly includes a cutting blade and a cutting drive unit, wherein the cutting blade is rotatably disposed within the machine cavity; the cutting drive unit is driven to connect with the cutting blade to drive the cutting blade to perform cutting operations; the air supply unit also includes a second linkage component, which is used to connect the valve structure and the cutting drive unit, and the second linkage component drives the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet according to the cutting parameters of the mowing assembly; wherein the cutting parameters of the mowing assembly include cutting height setting, cutting load, cutting current, and cutting speed.

[0035] With this configuration, as the cutting parameters of the mowing component change, the second linkage component can promptly drive the valve structure to synchronously adjust at least one of the air outlet direction and cross-sectional area of ​​the supplementary air outlet according to the cutting parameters of the mowing component. This ensures that when the cutting parameters of the mowing component change, at least one of the corresponding air outlet direction and cross-sectional area of ​​the supplementary air outlet will make an adaptive change, thereby realizing variable adjustment of airflow direction and cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0036] In one embodiment, the mowing device further includes a detector and a controller, wherein the detector is electrically connected to the mowing assembly and / or, the detector is electrically connected to a height adjustment mechanism; the controller includes a signal transmission module and a control module, the signal transmission module having a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detector; the signal transmitting end being signal-connected to the control module, and the control module being controllably connected to the closed-loop drive structure; or, the mowing device further includes a controller, the controller including a detection module, a signal transmission module, and a control module, wherein the detection module is electrically connected to the mowing assembly and / or, the detection module being electrically connected to the height adjustment mechanism; the signal transmission module having a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detection module; the signal transmitting end being signal-connected to the control module, and the control module being controllably connected to the closed-loop drive structure.

[0037] With this configuration, the controller receives signals from the detection module via the signal transmission module, and controls the closed drive structure to make corresponding adjustments based on the cutting parameters of the mowing component, and or, controls the closed drive structure to make corresponding adjustments based on the height adjustment parameters of the height adjustment mechanism. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy based on the real-time detected grass height and mowing environment, improving mowing accuracy and efficiency, and is suitable for intelligent mowing devices in complex environments. This intelligent design allows the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring consistent mowing results and efficient collection of grass clippings, thus improving mowing accuracy and efficiency.

[0038] According to another aspect of the present invention, a lawn mowing device is provided, including a housing, wherein the housing has a cavity, and a rotatable lawn mowing component is disposed within the cavity; wherein the area inside the cavity is a lawn mowing area, and the area outside the cavity is a non-mowing area; the lawn mowing device further includes an air supply unit, which is an air supply fan disposed on the housing, the air supply fan having an air supply inlet and an air supply outlet; the air supply outlet is located at at least one position on the cavity wall surface, the cavity top surface, and the bottom surface of the housing located in the non-mowing area.

[0039] This design, by placing the supplemental air outlet at at least one location on the cavity wall, the cavity top, and the bottom surface of the casing in the non-mowing area, provides additional airflow paths for the mowing device's cavity. This significantly mitigates the problem of reduced cross-sectional area of ​​the main air intake caused by direct contact with the ground. Especially when the mowing device is operating at low speeds, a continuous and sufficient airflow can still enter the cavity, helping to create a higher rotating negative pressure and thus increasing the suction generated at the blades. More effective suction improves the rapid collection and transfer of cut grass clippings to the outlet. Furthermore, by adding a supplemental air fan with both supplemental air inlet and outlet, the function of actively introducing external airflow into the cavity is achieved. This design greatly enhances the airflow exchange efficiency inside and outside the cavity and allows for adjustable supplemental air volume, enabling the device to flexibly adjust the internal airflow intensity according to actual working conditions and environmental requirements. Simultaneously, the active supplemental air system comprehensively reduces the load on the mowing components, minimizing additional energy consumption. In addition, by maintaining smooth airflow inside and outside the equipment, mechanical wear caused by poor airflow during mowing is reduced, extending the equipment's lifespan. This also simplifies the overall structure improvement of the mowing device and ensures the ease of manufacturing the device.

[0040] In one embodiment, the machine cavity has a straw discharge port; the airflow velocity at the make-up air outlet is less than the airflow velocity at the straw discharge port.

[0041] This configuration, by setting the airflow velocity at the supplementary air outlet to be lower than the airflow velocity at the discharge outlet, provides additional airflow as auxiliary airflow, which helps promote airflow within the machine cavity. This ensures that the dominant airflow remains focused on quickly pushing the cut vegetation to the discharge outlet, further improving the efficiency of grass clipping collection and ensuring that it is discharged in an orderly and unobstructed manner. This not only improves mowing efficiency but also reduces the risk of blockage.

[0042] In one embodiment, the make-up air inlet is located on at least one of the surfaces of the housing other than the bottom surface.

[0043] This design ensures a continuous and sufficient airflow into the mower cavity during operation, helping to create a higher rotating negative pressure and thus increasing the suction force generated at the blades. This more effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port.

[0044] In one embodiment, the mowing device further includes a detector and a controller, wherein the detector is electrically connected to the mowing assembly and / or, the detector is electrically connected to the height adjustment mechanism; the controller includes a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detector; the signal transmitting end being signal-connected to the control module, and the control module being control-connected to the supplementary air blower; or, the mowing device further includes a controller, the controller including a detection module, a signal transmission module, and a control module, wherein the detection module is electrically connected to the mowing assembly and / or, the detection module is electrically connected to the height adjustment mechanism; the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detection module; the signal transmitting end being signal-connected to the control module, and the control module being control-connected to the supplementary air blower.

[0045] With this configuration, the controller receives signals from the detection module via the signal transmission module, and controls the closed drive structure to make corresponding adjustments based on the cutting parameters of the mowing component, and or, controls the closed drive structure to make corresponding adjustments based on the height adjustment parameters of the height adjustment mechanism. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy based on the real-time detected grass height and mowing environment, improving mowing accuracy and efficiency, and is suitable for intelligent mowing devices in complex environments. This intelligent design allows the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring consistent mowing results and efficient collection of grass clippings, thus improving mowing accuracy and efficiency.

[0046] According to another aspect of the present invention, a mowing device is provided, including a housing, wherein the housing has a cavity, and a rotatable mowing component is disposed within the cavity; wherein the area inside the cavity is a mowing area, and the area outside the cavity is a non-mowing area; the mowing device further includes an air supply unit, at least having a connected air supply inlet and an air supply outlet; the air supply outlet is located at at least one position on the cavity wall, the cavity top surface, and the bottom surface of the housing in the non-mowing area, and a valve structure is provided at the air supply outlet.

[0047] This configuration, by placing the air supply outlet at at least one location—on the cavity wall, the cavity top, and the bottom surface of the casing in the non-mowing area—ensures a continuous and sufficient airflow into the cavity during operation. This helps create a higher rotating negative pressure, thereby increasing the suction force generated at the blades. More effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port. Furthermore, the valve structure at the air supply outlet allows for its opening and closing. When external airflow is not required, the outlet can be closed to prevent dust from entering the cavity.

[0048] In one embodiment, the air supply unit further includes a closing drive structure, which is disposed on the housing and driven to the valve structure. The closing drive structure drives the valve structure to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet.

[0049] This configuration, through the setting of a closed drive structure, drives at least one of the following: airflow direction, airflow cross-sectional area, and airflow velocity of the valve structure at the air supply outlet. This allows for variable adjustment of the airflow direction and airflow cross-sectional area, giving the equipment greater adaptability. It can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0050] In one embodiment, the mowing device further includes a height adjustment mechanism, which is driven and connected to the mowing assembly to adjust the distance between the rotating surface of the cutting blade of the mowing assembly and the ground; the air supply unit further includes a first linkage component, which is used to connect the valve structure and the height adjustment mechanism. The first linkage component drives the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet according to the height adjustment parameters of the height adjustment mechanism.

[0051] With this configuration, as the height adjustment mechanism adjusts the distance between the rotating surface of the cutting blade of the mowing assembly and the ground, the first linkage component can promptly drive the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area according to the height adjustment parameters of the height adjustment mechanism. This ensures that when the distance between the rotating surface of the cutting blade and the ground changes, at least one of the corresponding air outlet direction and air outlet cross-sectional area will make an adaptive change, thereby achieving variable adjustment of airflow direction and air outlet cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, improving overall work efficiency.

[0052] In one embodiment, the mowing assembly includes a cutting blade and a cutting drive unit, wherein the cutting blade is rotatably disposed within the machine cavity; the cutting drive unit is driven to connect with the cutting blade to drive the cutting blade to perform cutting operations; the air supply unit also includes a second linkage component, which is used to connect the valve structure and the cutting drive unit, and the second linkage component drives the valve structure to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet according to the cutting parameters of the mowing assembly; wherein the cutting parameters of the mowing assembly include cutting height setting, cutting load, cutting current, and cutting speed.

[0053] With this configuration, as the cutting parameters of the mowing component change, the second linkage component can promptly drive the valve structure to synchronously adjust at least one of the air outlet direction and cross-sectional area of ​​the supplementary air outlet according to the cutting parameters of the mowing component. This ensures that when the cutting parameters of the mowing component change, at least one of the corresponding air outlet direction and cross-sectional area of ​​the supplementary air outlet will make an adaptive change, thereby realizing variable adjustment of airflow direction and cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0054] In one embodiment, the machine cavity has a straw discharge port; the airflow velocity at the make-up air outlet is less than the airflow velocity at the straw discharge port.

[0055] This configuration, by setting the airflow velocity at the supplementary air outlet to be lower than the airflow velocity at the discharge outlet, provides additional airflow as auxiliary airflow, which helps promote airflow within the machine cavity. This ensures that the dominant airflow remains focused on quickly pushing the cut vegetation to the discharge outlet, further improving the efficiency of grass clipping collection and ensuring that it is discharged in an orderly and unobstructed manner. This not only improves mowing efficiency but also reduces the risk of blockage.

[0056] In one embodiment, the make-up air inlet is located on at least one of the surfaces of the housing other than the bottom surface.

[0057] This design ensures a continuous and sufficient airflow into the mower cavity during operation, helping to create a higher rotating negative pressure and thus increasing the suction force generated at the blades. This more effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port.

[0058] In one embodiment, the mowing device further includes a detector and a controller, wherein the detector is electrically connected to the mowing assembly and / or, the detector is electrically connected to a height adjustment mechanism; the controller includes a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detector; the signal transmitting end being signal-connected to the control module, and the control module being controllably connected to the closed-loop drive structure; or, the mowing device further includes a controller, the controller including a detection module, a signal transmission module, and a control module, wherein the detection module is electrically connected to the mowing assembly and / or, the detection module is electrically connected to the height adjustment mechanism; the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end being signal-connected to the detection module; the signal transmitting end being signal-connected to the control module, and the control module being controllably connected to the closed-loop drive structure.

[0059] With this configuration, the controller receives signals from the detection module via the signal transmission module, and controls the closed drive structure to make corresponding adjustments based on the cutting parameters of the mowing component, and or, controls the closed drive structure to make corresponding adjustments based on the height adjustment parameters of the height adjustment mechanism. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy based on the real-time detected grass height and mowing environment, improving mowing accuracy and efficiency, and is suitable for intelligent mowing devices in complex environments. This intelligent design allows the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring consistent mowing results and efficient collection of grass clippings, thus improving mowing accuracy and efficiency. Attached Figure Description

[0060] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0061] Figure 1 A cross-sectional view of a lawn mowing device according to an alternative embodiment of the present invention is shown.

[0062] Figure 2 It shows Figure 1 A schematic diagram of the valve structure of the air supply section of the lawnmower after adjustment;

[0063] Figure 3 A top view schematic diagram of a lawn mowing device according to an alternative embodiment of the present invention is shown;

[0064] Figure 4 It shows Figure 3 A structural schematic diagram of the lawnmower device from the bottom view;

[0065] Figure 5It shows Figure 1 A schematic diagram showing the relationship between different air outlet directions of the make-up air section of the lawnmower and the tangential direction of the airflow inside the machine cavity;

[0066] Figure 6 A schematic diagram showing the layout of the air supply outlet of a lawn mowing device according to an alternative embodiment of the present invention is provided.

[0067] Figure 7 A schematic diagram showing the preset angle range of the grass discharge port of a grass-cutting device according to an optional embodiment of the present invention is provided.

[0068] Figure 8 A schematic diagram of a lawn mowing device according to an alternative embodiment of the present invention is shown, in which a height adjustment mechanism is illustrated.

[0069] The above figures include the following reference numerals:

[0070] 10. Casing; 11. Cavity; 111. Straw discharge port;

[0071] 20. Mowing assembly; 21. Cutting blade; 22. Cutting drive unit;

[0072] 30. Makeup air section; 31. Makeup air inlet; 32. Makeup air outlet; 321. Valve structure; 33. Closure drive structure;

[0073] 40. Height adjustment mechanism. Detailed Implementation

[0074] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0075] Traditional lawnmowers rely on the negative pressure generated by rotating blades during operation to supplement airflow within the machine cavity, allowing for the effective intake and expulsion of cut grass clippings. However, during mowing, when the operator sets a traditional lawnmower to a low cutting height, the bottom of the mower is closer to the ground, significantly reducing the cross-sectional area of ​​the air intake duct. This is especially problematic with dense lawns, where the dense vegetation further obstructs airflow, making it more difficult for air to enter the machine cavity through the limited space. This results in a sharp decrease in the wind speed entering the cavity, directly weakening the suction force generated by the rotating blades. In this situation, not only does the blades need to overcome resistance when cutting short, thick vegetation, but the ability to quickly and effectively expel cut grass clippings from the machine is also reduced.

[0076] Because the efficiency of lawnmowers in both suction and discharge is severely affected by the aforementioned reasons, this often leads to the accumulation of residue inside the machine cavity, reducing overall operating efficiency and forcing users to frequently stop to clean the machine's interior. Furthermore, reduced airflow may also increase the engine's load, accelerate mechanical wear, and increase fuel or electricity consumption. Therefore, there is an urgent need to develop a lawnmower device that enhances air intake and optimizes internal airflow, improving the machine's ability to adapt to different working environments, such as varying densities and heights of vegetation, to ensure continuous, stable, and efficient lawnmower operations.

[0077] Example 1

[0078] like Figures 1 to 8 As shown, the mowing device includes a housing 10 and a height adjustment mechanism 40. The housing 10 has a cavity 11, and a rotatable mowing component 20 is disposed inside the cavity 11. The area inside the cavity 11 is the mowing area, and the area outside the cavity 11 is the non-mowing area. The height adjustment mechanism 40 is drivenly connected to the mowing component 20. The mowing device also includes an air supply unit 30, which has at least one air supply inlet 31 and one air supply outlet 32 ​​that are connected to each other. The air supply inlet 31 is located on at least one of the surfaces of the housing 10 other than the bottom surface. The air supply outlet 32 ​​is located at at least one position on the cavity wall surface, the top surface of the cavity 11, and the bottom surface of the housing 10 in the non-mowing area. The cavity 11 has a grass discharge outlet 111 for discharging grass. The airflow velocity at the air supply outlet 32 ​​is less than the airflow velocity at the grass discharge outlet 111.

[0079] By applying the technical solution of this application, a lawn mowing device is provided. Through a structural configuration where the supplementary air inlet 31 is located on at least one surface of the housing 10 (excluding the bottom surface), and the supplementary air outlet 32 ​​is located on at least one position on the cavity wall surface, the top surface of the cavity 11, and the bottom surface of the housing 10 in the non-mowing area, an additional airflow path is provided for the lawn mowing device's cavity. This significantly alleviates the problem of reduced cross-sectional area of ​​the main air inlet caused by direct contact with the ground. Especially when the lawn mowing device is operating at low speeds, a continuous and sufficient airflow can still enter the cavity, helping to create a higher rotating negative pressure, thereby increasing the suction force generated at the blades. This more effective suction improves the rapid collection and transfer of cut grass clippings to the outlet. In addition, by setting the airflow velocity at the supplementary air outlet to be lower than the airflow velocity at the grass discharge outlet, additional airflow is provided through the supplementary air outlet as auxiliary airflow, which helps to promote the flow of air in the machine cavity. This ensures that the dominant airflow is still focused on quickly pushing the cut vegetation to the discharge outlet, further improving the collection efficiency of grass clippings and ensuring that they are discharged in an orderly and unobstructed manner. This not only improves the mowing efficiency but also reduces the risk of blockage.

[0080] It should be noted that in this application, the supplementary air inlet 31 is located on at least one of the surfaces of the housing 10 other than the bottom surface. It can be the side surface or the top surface of the housing 10, so as to avoid sucking in grass clippings while ensuring smooth air intake.

[0081] like Figure 3 As shown, the dashed line E represents the projected area of ​​the machine cavity wall. The area inside the machine cavity wall is the aforementioned mowing area, and the area outside the machine cavity wall is the aforementioned non-mowing area.

[0082] like Figure 4 As shown, arrow F indicates the airflow direction of the straw discharge in the machine cavity 11. This application uses the airflow direction indicated by arrow F as an example for illustration. Of course, in an embodiment of this application not shown, the airflow direction of the straw discharge in the machine cavity 11 can also be opposite to arrow F, which will not be elaborated here.

[0083] like Figure 7As shown, the supplementary air outlet 32 ​​is located on the cavity wall and / or top surface of the cavity 11, and the supplementary air outlet 32 ​​is located at a position that avoids the grass discharge outlet 111 within a preset angle range on the cavity wall and / or top surface of the cavity 11; and / or, the supplementary air outlet 32 ​​is located in the non-mowing area, and the supplementary air outlet 32 ​​is located at a position that avoids the grass discharge outlet 111 within the non-mowing area. This avoids adverse interference with the main exhaust process. This ensures that airflows from different directions can work synergistically rather than conflict with each other, which helps prevent interference between the airflow from the supplementary air outlet 32 ​​and the grass discharge airflow within the cavity 11, ensuring better integration of the airflow from the supplementary air outlet 32 ​​with the grass discharge airflow within the cavity 11, thereby improving overall suction power and grass clipping transport efficiency.

[0084] It should be noted that in this application, Figure 7 The preset angle range of the grass discharge port 111 is the range where Q is located. In the grass discharge area, the angle between the two lines connecting the cutting axis as the origin and the point where the origin intersects with the first grass discharge area and the second grass discharge area of ​​the machine cavity is Q. That is, the supplementary air outlet 32 ​​is located in the area outside the angle Q.

[0085] like Figure 6 As shown, a coordinate axis is formed with the cutting axis of the mowing assembly 20 as the axis of the coordinate system, the forward direction of the mowing device as the Y-axis, and the direction perpendicular to the forward direction of the mowing device as the X-axis. The supplementary air outlet 32 ​​is located on the cavity wall and / or top surface of the cavity 11, and is located at least one position on the cavity wall and / or top surface of the cavity 11 within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis; and / or, the supplementary air outlet 32 ​​is located in the non-mowing area, and is located at least one position in the non-mowing area within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis. This ensures that the airflow from the supplementary air outlet 32 ​​can better integrate with the airflow discharging grass within the cavity 11, improving overall suction power and grass clipping transport efficiency. Furthermore... Figure 6 The angle range G in the coordinate system represents the range of 20° to 160° in the counterclockwise direction of the coordinate axes. Figure 6 The angle range H in the coordinate system represents the range of 200° to 340° in the counterclockwise direction of the coordinate axis.

[0086] like Figure 2As shown, there is a first angle A between the air outlet plane of the supplementary air outlet 32 ​​and the cavity opening plane of the machine cavity 11, and the value of the first angle A ranges from 0 to 180°. In this way, by reasonably optimizing the value range of the first angle A, the air blown out of the supplementary air outlet 32 ​​is prevented from being effectively blown into the machine cavity 11 due to the value range of the first angle A being too large or too small, thereby ensuring that the external airflow can be effectively introduced into the machine cavity 11.

[0087] like Figure 2 As shown, the area between dashed line C and dashed line D is the cutting area of ​​the mowing device. The height adjustment mechanism 40 is used to change the distance between dashed line C and dashed line D. Dashed line C is the line that intersects the horizontal line with any cutting point in the cutting plane formed when the cutting blade 21 rotates. Dashed line C is used as the relative reference point for the height adjustment mechanism 40 to adjust the height of the mowing device. Dashed line D is the ground horizontal line.

[0088] like Figure 5 As shown, when the make-up air outlet 32 ​​is located at at least one position on the cavity wall surface or the cavity top surface of the cavity 11, the air outlet direction of the make-up air outlet 32 ​​has a second included angle B with the tangential direction of the airflow flowing through the make-up air outlet 32 ​​within the cavity 11, and the value of the second included angle B is in the range of 0~180°. Specifically, Figure 5 The circle in the diagram is represented by the letter K, which indicates the cavity wall or top surface of the cavity 11. The arrow M indicates the tangential direction of the airflow passing through the air supply outlet 32 ​​in the cavity 11. Multiple arrows N indicate different air outlet directions when located at at least one position on the cavity wall or the top surface of the cavity 11. By reasonably optimizing the range of the second included angle B, it is ensured that the external airflow introduced by the air supply outlet 32 ​​can be well integrated with the grass discharge airflow in the cavity 11, thereby forming a strong airflow.

[0089] It should be noted that, in this application, at least one of the air outlet direction and the air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​is adjustable. By adjusting at least one of the air outlet direction and the air outlet cross-sectional area of ​​the supplementary air outlet 32, the mowing device can quickly adjust the airflow path according to different mowing environments and needs, optimize the airflow inside the machine cavity, further optimize wind circulation, and improve mowing efficiency. Furthermore, by adjusting the air outlet cross-sectional area, the wind speed and volume of the supplementary air can be controlled, which helps to precisely control the amount of air entering the machine cavity, improve the negative pressure environment within the blade working area, and thus better adapt to the cutting needs of different grass species and heights, ensuring mowing results. This allows the mowing device to better adapt to mowing tasks, improving mowing quality and efficiency.

[0090] Of course, in one embodiment of this application (not shown), the air outlet direction and cross-sectional area of ​​the supplementary air outlet 32 ​​are not adjustable. This helps to reduce the manufacturing difficulty of the supplementary air outlet 32 ​​of the lawn mower, thereby reducing the manufacturing cost of the lawn mower.

[0091] like Figure 1 and Figure 2 As shown, when the housing 10 is a single-layer housing, the air supply section 30 is a first through-hole structure that penetrates the housing 10. One axial end of the first through-hole structure penetrates the outer surface of the housing 10 to form an air supply inlet 31, and the other axial end of the first through-hole structure penetrates the inner surface of the housing 10 to form an air supply outlet 32. In this way, since the housing 10 is a single-layer housing, it is only necessary to directly open the first through-hole structure on one side of the housing, so that the two ends of the first through-hole structure form the air supply inlet 31 and the air supply outlet 32 ​​respectively. This simplifies the structure of the air supply section 30, reduces manufacturing costs, and ensures sufficient air supply volume, making it suitable for various types of lawn mowing devices, whether manual or automatic. In addition, the design of the first through-hole structure not only reduces the manufacturing cost of the lawn mowing device, but also simplifies the maintenance and cleaning process of the air supply section 30, improving the economy and maintenance convenience of the equipment.

[0092] like Figure 3 and Figure 4 As shown, when the housing 10 is a single-layer housing, the air supply section 30 is a first air guide structure provided on the housing 10. The first air guide structure has a first ventilation cavity and an air supply inlet 31 and an air supply outlet 32 ​​that are connected to the first ventilation cavity. In this way, by setting a first air guide structure on the housing 10, and the first air guide structure having its own first ventilation cavity and a supplementary air inlet 31 and a supplementary air outlet 32 ​​connected to the first ventilation cavity, the overall structure of the mowing device is kept relatively simple. At the same time, only the addition of the first air guide structure is needed to achieve the purpose of introducing external airflow into the housing 11. In addition, this design allows the supplementary air section 30 to more effectively guide the wind to the mowing area, improving the efficiency of grass clipping collection. At the same time, the first air guide structure can also protect the mowing component 20, making it suitable for the mowing device to operate on uneven terrain. The introduction of the first air guide structure not only enhances the wind circulation in the mowing area and improves the grass clipping collection effect, but also prevents the mowing component 20 from directly contacting the ground when the mowing device passes through uneven terrain, reducing wear and damage, and ensuring the long-term stable operation of the mowing component 20 and the consistency of the mowing effect.

[0093] It should be noted that, in an embodiment not shown in this application, when the housing 10 is a double-layer housing, the air supply section 30 is a second through-hole structure that penetrates the housing 10. One axial end of the second through-hole structure penetrates the outer layer of the housing 10 to form an air supply inlet 31, and the other axial end of the second through-hole structure penetrates the inner layer of the housing 10 to form an air supply outlet 32. An air supply duct connecting the air supply inlet 31 and the air supply outlet 32 ​​is formed between the outer layer and the inner layer of the housing 10. In this way, since the housing 10 is a double-layered housing, by opening a second through hole structure on the housing 10, one axial end of the second through hole structure penetrates through the outer layer of the housing 10 to form a supplementary air inlet 31, and the other axial end of the second through hole structure penetrates through the inner layer of the housing 10 to form a supplementary air outlet 32. A supplementary air duct connecting the supplementary air inlet 31 and the supplementary air outlet 32 ​​is formed between the outer layer and the inner layer of the housing 10, ensuring the reliability of the connection between the supplementary air inlet 31 and the supplementary air outlet 32 ​​through the supplementary air duct, thereby ensuring the reliability of the introduction of external airflow into the housing 11.

[0094] It should be noted that, in an embodiment not shown in this application, when the housing 10 is a double-layered housing, the air supply section 30 is a second air guide structure disposed on the housing 10. The second air guide structure has a second ventilation cavity and an air supply inlet 31 and an air supply outlet 32 ​​communicating with the second ventilation cavity. In this way, by providing a second air guide structure on the housing 10, and the second air guide structure having its own second ventilation cavity and an air supply inlet 31 and an air supply outlet 32 ​​communicating with the second ventilation cavity, the overall structure of the mowing device is kept relatively simple, and the purpose of introducing external airflow into the housing 11 can be achieved simply by adding the second air guide structure.

[0095] Furthermore, the double-shell structure not only effectively isolates the noise generated during mowing, but also protects the internal components from external environmental influences, improving the durability and user comfort of the mowing device. The double-shell design not only reduces the noise level during mowing operations and enhances the user's comfort experience, but also blocks external environmental factors such as rain and dust from damaging the internal components of the mowing device. Especially when used in rainy or windy areas, it can significantly improve the durability and reliability of the mowing device.

[0096] like Figure 2 As shown, with the cavity opening plane of the machine cavity 11 as the reference, the air outlet plane of the supplementary air outlet 32 ​​is located below the horizontal plane of the point where the cutting blade 21 of the mowing assembly 20 is furthest from the reference. In this way, the airflow introduced into the machine cavity 11 by the supplementary air outlet 32 ​​is used as an auxiliary airflow and will not affect the airflow cutting the grass during the rotation of the cutting blade 21. This is conducive to promoting the airflow in the machine cavity, so that the dominant airflow is still focused on quickly pushing the cut vegetation to the outlet, further improving the collection efficiency of grass clippings, and ensuring that they are discharged in an orderly and unobstructed manner.

[0097] It should be noted that, in an embodiment not shown in this application, the supplementary air unit 30 is a supplementary air fan mounted on the housing 10, which has a supplementary air inlet 31 and a supplementary air outlet 32. Thus, by adding a supplementary air fan, the function of actively introducing external airflow into the machine cavity is achieved. This design greatly enhances the airflow exchange efficiency inside and outside the machine cavity and allows for adjustable supplementary airflow, enabling the device to flexibly adjust the internal airflow intensity according to actual working conditions and environmental requirements. Simultaneously, the active supplementary air system comprehensively reduces the load on the mowing components, reducing additional energy consumption. Furthermore, by maintaining smooth airflow inside and outside the equipment, mechanical wear caused by poor airflow during mowing is reduced, extending the equipment's lifespan.

[0098] In one embodiment of this application (not shown), the specific form of the supplementary air fan includes, but is not limited to, a blower or a motor-driven fan structure. Exemplarily, the supplementary air fan is a blower. When the housing 10 is a single-layer structure, the blower is disposed on the outer surface of the housing 10 except for the bottom of the housing. The air outlet of the blower is connected to a pre-set supplementary air outlet 32 ​​that communicates with the cavity 11. Alternatively, the air outlet of the blower is the supplementary air outlet 32 ​​that communicates with the cavity 11. When the housing 10 is a double-layer structure, the blower can be disposed on the outer surface of the housing 10 except for the bottom of the housing or in the gap between the two housing layers.

[0099] like Figure 1 and Figure 2 As shown, a valve structure 321 is provided at the air supply outlet 32. The valve structure 321 is mounted on the housing 10 to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32. Thus, the valve structure 321 ensures the reliability of adjusting at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32, thereby ensuring that the mowing device provided in this application can be applied to a wider range of mowing scenarios.

[0100] like Figure 1 and Figure 2 As shown, the air supply unit 30 also includes a closed-loop drive structure 33, which is mounted on the housing 10. The closed-loop drive structure 33 is driven to connect with the valve structure 321. This drive connection includes, but is not limited to, the closed-loop drive structure 33 having a drive shaft connected to the valve structure 321 to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32. Thus, by setting the closed-loop drive structure 33 to drive at least one of the air outlet direction, air outlet cross-sectional area, and air outlet velocity of the valve structure 321 at the air supply outlet 32, variable adjustment of the airflow direction and air outlet cross-sectional area is achieved. This gives the equipment greater adaptability, allowing it to adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0101] Optionally, the specific form of the valve structure 321 includes, but is not limited to, arc-shaped, straight-strip-shaped, rake-shaped, fan-shaped, or other air-guiding plates or structures with air-guiding channels.

[0102] like Figure 1 , Figure 2 and Figure 8 As shown, the supplementary air unit 30 also includes a first linkage component, which connects the valve structure 321 and the height adjustment mechanism 40. The first linkage component drives the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​according to the height adjustment parameters of the height adjustment mechanism 40. Thus, as the height adjustment mechanism 40 adjusts the distance between the rotating surface of the cutting blade of the mowing component 20 and the ground, the first linkage component can promptly drive the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​according to the height adjustment parameters of the height adjustment mechanism 40. This ensures that when the distance between the rotating surface of the cutting blade and the ground changes, at least one of the corresponding air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​adapts accordingly. This achieves variable adjustment of airflow direction and air outlet cross-sectional area, giving the equipment greater adaptability and allowing it to adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0103] It should be noted that, in this application, the specific form of the first linkage component includes, but is not limited to, mechanical linkage such as linkage structure, chain structure, belt structure, etc. For example, when the first linkage component is a linkage structure, one end of the linkage mechanism is connected to the gear adjustment structure of the height adjustment mechanism, and the other end is connected to the valve structure. When the gear adjustment structure moves to a lower gear step by step, the valve structure moves with the gear adjustment structure, gradually expanding the air outlet area.

[0104] like Figure 1 and Figure 2As shown, the mowing assembly 20 includes a cutting blade 21 and a cutting drive unit 22. The cutting blade 21 is rotatably disposed within the machine cavity 11. The cutting drive unit 22 is driven to the cutting blade 21 to drive the cutting blade 21 to perform cutting operations. The air supply unit 30 also includes a second linkage component, which is used to connect the valve structure 321 and the cutting drive unit 22. The second linkage component drives the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32 ​​according to the cutting parameters of the mowing assembly 20. The cutting parameters of the mowing assembly 20 include the cutting height setting, cutting load, cutting current, and cutting speed. In this way, as the cutting parameters of the mowing component 20 change, the second linkage component can promptly drive the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​according to the cutting parameters of the mowing component 20. This ensures that when the cutting parameters of the mowing component 20 change, at least one of the corresponding air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​will make an adaptive change, thereby realizing variable adjustment of airflow direction and air outlet cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving the overall work efficiency.

[0105] It should be noted that, in this application, the specific form of the second linkage component includes, but is not limited to, mechanical linkage such as linkage structure, chain structure, belt structure, etc. For example, when the first linkage component is a linkage structure, one end of the linkage mechanism is connected to the cutting drive unit 22 and the other end is connected to the valve structure. When the gear adjustment structure moves to higher speed step by step, the valve structure moves with the gear adjustment structure, gradually expanding the air outlet area.

[0106] It should be noted that, in one embodiment of this application (not shown), the lawn mowing device further includes a detector and a controller, wherein the detector is electrically connected to the lawn mowing assembly 20, and / or the detector is electrically connected to the height adjustment mechanism 40; the controller includes a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end is signal-connected to the detector; the signal transmitting end is signal-connected to the control module, and the control module is control-connected to the closing drive structure 33. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0107] It should be noted that, in one embodiment of this application (not shown), the lawn mowing device further includes a controller, which includes a detection module, a signal transmission module, and a control module. The detection module is electrically connected to the lawn mowing component 20 and / or electrically connected to the height adjustment mechanism 40. The signal transmission module has a signal receiving end and a signal transmitting end. The signal receiving end is signal-connected to the detection module. The signal transmitting end is signal-connected to the control module. The control module is control-connected to the closed drive structure 33. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0108] Example 2

[0109] In this embodiment, the difference from Embodiment 1 is that, as Figures 1 to 8As shown, the mowing device includes a housing 10, wherein the housing 10 has a cavity 11, and a rotatable mowing component 20 is disposed inside the cavity 11; wherein the area inside the cavity 11 is the mowing area, and the area outside the cavity 11 is the non-mowing area; the mowing device also includes an air supply unit 30, which is an air supply fan disposed on the housing 10, and the air supply fan has an air supply inlet 31 and an air supply outlet 32; the air supply outlet 32 ​​is located at at least one position on the cavity wall surface of the cavity 11, the cavity top surface of the cavity 11, and the bottom surface of the housing 10 in the non-mowing area.

[0110] By applying the technical solution of this application, a lawn mowing device is provided. By configuring the supplementary air outlet 32 ​​at at least one location—on the cavity wall of the machine chamber 11, the top surface of the machine chamber 11, and the bottom surface of the casing 10 in the non-mowing area—an additional airflow path is provided to the machine chamber. This significantly alleviates the problem of reduced cross-sectional area of ​​the main air inlet caused by direct contact with the ground. Especially when the lawn mowing device is operating at low speeds, a continuous and sufficient airflow can still enter the machine chamber, helping to create a higher rotating negative pressure, thereby increasing the suction force generated at the blades. More effective suction improves the rapid absorption and transfer of cut grass clippings to the outlet. Furthermore, by adding a supplementary air fan with a supplementary air inlet 31 and a supplementary air outlet 32, the function of actively introducing external airflow into the machine chamber is realized. This design greatly enhances the airflow exchange efficiency inside and outside the machine chamber and allows for adjustable supplementary air volume, enabling the device to flexibly adjust the internal airflow intensity according to actual working conditions and environmental requirements. Simultaneously, the active supplementary air system comprehensively reduces the load on the mowing components and reduces additional energy consumption. In addition, by maintaining smooth airflow inside and outside the equipment, mechanical wear caused by poor airflow during mowing is reduced, extending the equipment's lifespan. This also simplifies the overall structure improvement of the mowing device and ensures the ease of manufacturing the device.

[0111] like Figure 6 and Figure 7 As shown, the machine cavity 11 has a straw discharge port 111 for discharging straw; the airflow velocity at the supplementary air outlet 32 ​​is lower than the airflow velocity at the straw discharge port 111. By setting the airflow velocity at the supplementary air outlet 32 ​​to be lower than the airflow velocity at the straw discharge port 111, it is beneficial to promote airflow within the machine cavity 11, further improving the straw collection efficiency.

[0112] It should be noted that in this application, the supplementary air inlet 31 is located on at least one of the surfaces of the housing 10, excluding the bottom surface. This provides an additional airflow path for the mower's cavity, significantly mitigating the problem of reduced main airflow cross-sectional area caused by direct contact with the ground. Especially when the mower is operating at low speeds, a continuous and sufficient airflow can still enter the cavity, helping to create a higher rotating negative pressure, thereby increasing the suction generated at the blades. This more effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port.

[0113] It should be noted that in this application, the supplementary air inlet 31 is located on at least one of the surfaces of the housing 10 other than the bottom surface. It can be the side surface or the top surface of the housing 10, so as to avoid sucking in grass clippings while ensuring smooth air intake.

[0114] It should be noted that, in one embodiment of this application (not shown), the mowing device further includes a detector and a controller, wherein the detector is electrically connected to the mowing assembly 20, and / or the detector is electrically connected to the height adjustment mechanism 40; the controller includes a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end is signal-connected to the detector; the signal transmitting end is signal-connected to the control module, and the control module is control-connected to the supplementary air blower. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0115] It should be noted that, in one embodiment of this application (not shown), the lawn mowing device further includes a controller, which includes a detection module, a signal transmission module, and a control module. The detection module is electrically connected to the lawn mowing component 20, and / or the detection module is electrically connected to the height adjustment mechanism 40. The signal transmission module has a signal receiving end and a signal transmitting end. The signal receiving end is signal-connected to the detection module. The signal transmitting end is signal-connected to the control module, and the control module is control-connected to the supplementary air blower. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0116] Example 3

[0117] In this embodiment, the difference from Embodiment 2 is that, as Figures 1 to 8 As shown, the mowing device includes a housing 10, wherein the housing 10 has a cavity 11, and a rotatable mowing component 20 is disposed inside the cavity 11; wherein the area inside the cavity 11 is the mowing area, and the area outside the cavity 11 is the non-mowing area; the mowing device also includes an air supply unit 30, at least the air supply unit 30 has a connected air supply inlet 31 and an air supply outlet 32; the air supply outlet 32 ​​is located at at least one position on the cavity wall surface of the cavity 11, the cavity top surface of the cavity 11, and the bottom surface of the housing 10 located in the non-mowing area, and a valve structure 321 is provided at the air supply outlet 32.

[0118] Applying the technical solution of this application, a lawn mowing device is provided. By configuring the supplementary air outlet 32 ​​at at least one location on the cavity wall surface, the top surface of the cavity 11, and the bottom surface of the casing 10 in the non-mowing area, an additional airflow path is provided for the cavity of the lawn mowing device. This greatly alleviates the problem of reduced cross-sectional area of ​​the main air intake caused by direct contact with the ground. Especially when the lawn mowing device is operating at a low speed, the cavity can still obtain a continuous and sufficient airflow, which helps to form a higher rotating negative pressure, thereby increasing the suction force generated at the blades. The more effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port. In addition, by providing a valve structure 321 at the supplementary air outlet 32 ​​for closing or opening the supplementary air outlet 32, when there is no need to introduce external airflow, the supplementary air outlet 32 ​​can be closed by the valve structure 321 to prevent dust from entering the cavity 11.

[0119] like Figure 1 and Figure 2 As shown, the air supply unit 30 also includes a closed-loop drive structure 33, which is mounted on the housing 10 and connected to the valve structure 321. The closed-loop drive structure 33 drives the valve structure 321 to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32. Thus, by setting up the closed-loop drive structure 33, which is a valve drive motor, to drive at least one of the air outlet direction, air outlet cross-sectional area, and air outlet velocity of the valve structure 321 at the air supply outlet 32, variable adjustment of the airflow direction and air outlet cross-sectional area is achieved. This gives the equipment greater adaptability, allowing it to adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0120] like Figure 1 , Figure 2 and Figure 8As shown, the mowing device also includes a height adjustment mechanism 40, which is drivenly connected to the mowing assembly 20 to adjust the distance between the rotating surface of the cutting blade 21 of the mowing assembly 20 and the ground; the air supply unit 30 also includes a first linkage component, which is used to connect the valve structure 321 and the height adjustment mechanism 40. The first linkage component drives the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32 ​​according to the height adjustment parameters of the height adjustment mechanism 40. In this way, as the height adjustment mechanism 40 adjusts the distance between the rotating surface of the cutting blade 21 of the mowing assembly 20 and the ground, the first linkage component can promptly drive the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​according to the height adjustment parameters of the height adjustment mechanism 40. This ensures that when the distance between the rotating surface 21 of the cutting blade and the ground changes, at least one of the corresponding air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​will make an adaptive change, thereby realizing variable adjustment of airflow direction and air outlet cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving overall work efficiency.

[0121] like Figure 1 and Figure 2 As shown, the mowing assembly 20 includes a cutting blade 21 and a cutting drive unit 22. The cutting blade 21 is rotatably disposed within the machine cavity 11. The cutting drive unit 22 is driven to the cutting blade 21 to drive the cutting blade 21 to perform cutting operations. The air supply unit 30 also includes a second linkage component, which is used to connect the valve structure 321 and the cutting drive unit 22. The second linkage component drives the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet 32 ​​according to the cutting parameters of the mowing assembly 20. The cutting parameters of the mowing assembly 20 include the cutting height setting, cutting load, cutting current, and cutting speed. In this way, as the cutting parameters of the mowing component 20 change, the second linkage component can promptly drive the valve structure 321 to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​according to the cutting parameters of the mowing component 20. This ensures that when the cutting parameters of the mowing component 20 change, at least one of the corresponding air outlet direction and air outlet cross-sectional area of ​​the supplementary air outlet 32 ​​will make an adaptive change, thereby realizing variable adjustment of airflow direction and air outlet cross-sectional area. This makes the equipment more adaptable and can adjust the airflow path and intensity according to the working environment and mowing needs, thereby improving the overall work efficiency.

[0122] It should be noted that in this application, the machine cavity 11 has a grass discharge port 111 for discharging grass; the airflow velocity of the supplementary air outlet 32 ​​is less than the airflow velocity of the air flowing through the grass discharge port 111. In this way, by setting the airflow velocity of the supplementary air outlet 32 ​​to be less than the airflow velocity of the air flowing through the grass discharge port 111, the supplementary air outlet provides additional airflow as auxiliary airflow, which helps to promote the airflow in the machine cavity. This ensures that the dominant airflow is still focused on quickly pushing the cut vegetation to the discharge port, further improving the grass clipping collection efficiency and ensuring that it is discharged in an orderly and unobstructed manner. This not only improves the mowing efficiency but also reduces the risk of blockage.

[0123] It should be noted that in this application, the supplementary air inlet 31 is located on at least one of the surfaces of the housing 10, excluding the bottom surface. This provides an additional airflow path for the mower's cavity, significantly mitigating the problem of reduced main airflow cross-sectional area caused by direct contact with the ground. Especially when the mower is operating at low speeds, a continuous and sufficient airflow can still enter the cavity, helping to create a higher rotating negative pressure, thereby increasing the suction generated at the blades. This more effective suction improves the rapid collection and transfer of cut grass clippings to the discharge port.

[0124] It should be noted that in this application, the supplementary air inlet 31 is located on at least one of the surfaces of the housing 10 other than the bottom surface. It can be the side surface or the top surface of the housing 10, so as to avoid sucking in grass clippings while ensuring smooth air intake.

[0125] It should be noted that, in one embodiment of this application (not shown), the lawn mowing device further includes a detector and a controller, wherein the detector is electrically connected to the lawn mowing assembly 20, and / or the detector is electrically connected to the height adjustment mechanism 40; the controller includes a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal transmitting end, the signal receiving end is signal-connected to the detector; the signal transmitting end is signal-connected to the control module, and the control module is control-connected to the closing drive structure 33. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0126] It should be noted that, in one embodiment of this application (not shown), the lawn mowing device further includes a controller, which includes a detection module, a signal transmission module, and a control module. The detection module is electrically connected to the lawn mowing component 20 and / or electrically connected to the height adjustment mechanism 40. The signal transmission module has a signal receiving end and a signal transmitting end. The signal receiving end is signal-connected to the detection module. The signal transmitting end is signal-connected to the control module. The control module is control-connected to the closed drive structure 33. In this way, the controller receives signals from the detection module through the signal transmission module and controls the closed drive structure 33 to make corresponding adjustments according to the cutting parameters of the mowing component 20, and or controls the closed drive structure 33 to make corresponding adjustments according to the height adjustment parameters of the height adjustment mechanism 40. This design enables the mowing device to automatically adjust the mowing height and supplementary air strategy according to the real-time detected grass height and mowing environment, improving the accuracy and efficiency of mowing, and is suitable for intelligent mowing devices to mow grass in complex environments. This intelligent design enables the mowing device to adjust the mowing height and supplementary air strategy in real time in complex and changing mowing environments, ensuring the consistency of mowing effect and efficient collection of grass clippings, and improving the accuracy and efficiency of mowing.

[0127] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0128] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0129] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0130] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0131] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0132] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lawn mowing device, characterized in that, include: The housing (10) has a cavity (11) in which a rotatable mowing assembly (20) is provided. The area inside the machine cavity (11) is the mowing area, and the area outside the machine cavity (11) is the non-mowing area. A height adjustment mechanism (40) is drivenly connected to the mowing assembly (20); The lawn mowing device also includes: The air supply section (30) has at least one air supply inlet (31) and one air supply outlet (32) connected to each other. The air intake (31) is located on at least one of the surfaces of the housing (10) other than the bottom surface; The air supply outlet (32) is located at at least one position on the cavity wall surface of the machine cavity (11), the top surface of the machine cavity (11), and the bottom surface of the casing (10) in the non-mowing area. The machine cavity (11) has a straw discharge port (111) for discharging straw. The airflow velocity at the supplementary air outlet (32) is less than the airflow velocity at the grass discharge outlet (111).

2. The lawn mowing device according to claim 1, characterized in that, The supplementary air outlet (32) is located on the cavity wall and / or top surface of the machine cavity (11), and the supplementary air outlet (32) is located at a position on the cavity wall and / or top surface of the machine cavity (11) that avoids the grass discharge outlet (111) within a preset angle range; and / or, The supplemental air outlet (32) is located in the non-mowing area, and the supplemental air outlet (32) is located in the non-mowing area at a preset angle range away from the grass discharge outlet (111).

3. The lawn mowing device according to claim 1, characterized in that, The coordinate axes are formed with the cutting axis of the mowing assembly (20) as the axis, the forward direction of the mowing device as the Y-axis, and the direction perpendicular to the forward direction of the mowing device as the X-axis; wherein, The supplementary air outlet (32) is located on the cavity wall and / or top surface of the machine cavity (11), and the supplementary air outlet (32) is located at at least one position on the cavity wall and / or top surface of the machine cavity (11) within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis; and / or, The supplemental air outlet (32) is located in the non-mowing area, and the supplemental air outlet (32) is located at at least one position in the non-mowing area within the range of 20°~160° and 200°~340° in the counterclockwise direction of the coordinate axis.

4. The lawn mowing device according to claim 1, characterized in that, The air outlet plane where the supplementary air outlet (32) is located has a first included angle A with the cavity plane where the cavity (11) is located, and the value of the first included angle A is in the range of 0~180°.

5. The lawn mowing device according to claim 1, characterized in that, When the air supply outlet (32) is located at at least one position on the cavity wall surface or the top surface of the cavity (11), the air outlet direction of the air supply outlet (32) has a second included angle B with the tangential direction of the airflow flowing through the air supply outlet (32) in the cavity (11), and the value of the second included angle B is in the range of 0~180°.

6. The lawn mowing device according to claim 1, characterized in that, At least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) can be adjusted.

7. The lawn mowing device according to claim 1, characterized in that, The air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) are not adjustable.

8. The lawn mowing device according to any one of claims 1 to 7, characterized in that, When the housing (10) is a single-layer housing, the air supply section (30) is a first through-hole structure that penetrates the housing (10). One axial end of the first through-hole structure penetrates the outer surface of the housing (10) to form the air supply inlet (31), and the other axial end of the first through-hole structure penetrates the inner surface of the housing (10) to form the air supply outlet (32); or, When the housing (10) is a single-layer housing, the air supply section (30) is a first air guide structure disposed on the housing (10), the first air guide structure having a first ventilation cavity and an air supply inlet (31) and an air supply outlet (32) communicating with the first ventilation cavity; or, When the housing (10) is a double-layer housing, the air supply part (30) is a second through hole structure that penetrates the housing (10). One axial end of the second through hole structure penetrates the outer layer of the housing (10) to form the air supply inlet (31), and the other axial end of the second through hole structure penetrates the inner layer of the housing (10) to form the air supply outlet (32). An air supply duct connecting the air supply inlet (31) and the air supply outlet (32) is formed between the outer layer and the inner layer of the housing (10). or, When the housing (10) is a double-layer housing, the air supply part (30) is a second air guide structure provided on the housing (10). The second air guide structure has a second ventilation cavity and the air supply inlet (31) and the air supply outlet (32) communicating with the second ventilation cavity.

9. The lawn mowing device according to claim 1, characterized in that, With the cavity opening plane of the machine cavity (11) as a reference, the air outlet plane of the supplementary air outlet (32) is located below the horizontal plane of the point where the cutting blade (21) of the mowing assembly (20) is furthest from the reference.

10. The lawn mowing device according to claim 1, characterized in that, The air supply unit (30) is an air supply fan installed on the housing (10), and the air supply fan has the air supply inlet (31) and the air supply outlet (32).

11. The mowing device according to any one of claims 1 to 7, 9 to 10, characterized in that, A valve structure (321) is provided at the air supply outlet (32), and the valve structure (321) is provided on the housing (10) to adjust at least one of the air supply outlet (32) air outlet direction and air outlet cross-sectional area.

12. The lawnmower according to claim 11, characterized in that, The air supply unit (30) also includes: A closed drive structure (33) is provided on the housing (10). The closed drive structure (33) is driven to be connected to the valve structure (321) to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32).

13. The lawnmower according to claim 12, characterized in that, The air supply unit (30) also includes: The first linkage component is used to connect the valve structure (321) and the height adjustment mechanism (40). The first linkage component drives the valve structure (321) to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) according to the height adjustment parameters of the height adjustment mechanism (40).

14. The lawnmower according to claim 11, characterized in that, The lawn mowing assembly (20) includes: A cutting blade (21) is rotatably disposed within the machine cavity (11); A cutting drive unit (22) is connected to the cutting blade (21) to drive the cutting blade (21) to perform cutting operations; The air supply unit (30) also includes: The second linkage component is used to connect the valve structure (321) and the cutting drive unit (22). The second linkage component drives the valve structure (321) to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) according to the cutting parameters of the mowing component (20). The cutting parameters of the mowing component (20) include cutting height setting, cutting load, cutting current, and cutting speed.

15. The lawnmower according to claim 12, characterized in that, The lawn mowing device also includes: The detector is electrically connected to the mowing assembly (20) and / or the detector is electrically connected to the height adjustment mechanism (40); Controller, the controller includes: A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is connected to the detector signal; The control module, wherein the signal emitting end is connected to the control module, and the control module is controlled to the closed drive structure (33); or, The mowing device also includes a controller, the controller comprising: The detection module is electrically connected to the mowing assembly (20), and / or the detection module is electrically connected to the height adjustment mechanism (40); A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is signal-connected to the detection module; The control module is connected to the signal output terminal and the control module is connected to the closed drive structure (33) for control.

16. A lawn mowing device, characterized in that, include: The housing (10) has a cavity (11) in which a rotatable mowing assembly (20) is provided. The area inside the machine cavity (11) is the mowing area, and the area outside the machine cavity (11) is the non-mowing area. The lawn mowing device also includes: Air supply unit (30), wherein the air supply unit (30) is an air supply fan installed on the housing (10), the air supply fan having an air supply inlet (31) and an air supply outlet (32). The air supply outlet (32) is located at at least one position on the cavity wall surface of the machine cavity (11), the cavity top surface of the machine cavity (11), and the bottom surface of the casing (10) in the non-mowing area.

17. The lawnmower according to claim 16, characterized in that, The machine cavity (11) has a straw discharge port (111) for discharging straw. The airflow velocity at the supplementary air outlet (32) is less than the airflow velocity at the grass discharge outlet (111).

18. The lawnmower according to claim 16, characterized in that, The supplemental air inlet (31) is located on at least one of the surfaces of the housing (10) other than the bottom surface.

19. The lawnmower according to claim 16, characterized in that, The lawn mowing device also includes: The detector is electrically connected to the mowing assembly (20), and / or the detector is used to be electrically connected to the height adjustment mechanism (40); Controller, the controller includes: A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is connected to the detector signal; The control module, wherein the signal transmitting end is connected to the control module, and the control module is connected to the make-up air fan control; or, The mowing device also includes a controller, the controller comprising: A detection module, which is electrically connected to the mowing assembly (20), and / or, which is electrically connected to the height adjustment mechanism (40); A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is signal-connected to the detection module; The control module is connected to the signal output terminal and the control module is connected to the make-up air fan control.

20. A lawn mowing device, characterized in that, include: The housing (10) has a cavity (11) in which a rotatable mowing assembly (20) is provided. The area inside the machine cavity (11) is the mowing area, and the area outside the machine cavity (11) is the non-mowing area. The lawn mowing device also includes: The air supply section (30) has at least one air supply inlet (31) and one air supply outlet (32) connected to each other. The air supply outlet (32) is located at at least one position on the cavity wall of the machine cavity (11), the top surface of the machine cavity (11), and the bottom surface of the machine casing (10) in the non-mowing area. A valve structure (321) is provided at the air supply outlet (32).

21. The lawnmower according to claim 20, characterized in that, The air supply unit (30) also includes: A closed drive structure (33) is provided on the housing (10) and driven to connect with the valve structure (321). The closed drive structure (33) drives the valve structure (321) to adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32).

22. The lawnmower according to claim 20, characterized in that, The lawn mowing device also includes: A height adjustment mechanism (40) is drivenly connected to the mowing assembly (20) to adjust the distance between the rotating surface of the cutting blade (21) of the mowing assembly (20) and the ground. The air supply unit (30) also includes: The first linkage component is used to connect the valve structure (321) and the height adjustment mechanism (40). The first linkage component drives the valve structure (321) to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) according to the height adjustment parameters of the height adjustment mechanism (40).

23. The lawnmower according to claim 20, characterized in that, The lawn mowing assembly (20) includes: A cutting blade (21) is rotatably disposed within the machine cavity (11); A cutting drive unit (22) is connected to the cutting blade (21) to drive the cutting blade (21) to perform cutting operations; The air supply unit (30) also includes: The second linkage component is used to connect the valve structure (321) and the cutting drive unit (22). The second linkage component drives the valve structure (321) to synchronously adjust at least one of the air outlet direction and air outlet cross-sectional area of ​​the air supply outlet (32) according to the cutting parameters of the mowing component (20). The cutting parameters of the mowing component (20) include cutting height setting, cutting load, cutting current, and cutting speed.

24. The lawnmower according to any one of claims 20 to 23, characterized in that, The machine cavity (11) has a straw discharge port (111) for discharging straw. The airflow velocity at the supplementary air outlet (32) is less than the airflow velocity at the grass discharge outlet (111).

25. The lawnmower according to any one of claims 20 to 23, characterized in that, The supplemental air inlet (31) is located on at least one of the surfaces of the housing (10) other than the bottom surface.

26. The lawnmower according to claim 21, characterized in that, The lawn mowing device also includes: The detector is electrically connected to the mowing assembly (20), and / or the detector is used to be electrically connected to the height adjustment mechanism (40); Controller, the controller includes: A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is connected to the detector signal; The control module, wherein the signal emitting end is connected to the control module, and the control module is controlled to the closed drive structure (33); or, The mowing device also includes a controller, the controller comprising: A detection module, which is electrically connected to the mowing assembly (20), and / or, which is electrically connected to the height adjustment mechanism (40); A signal transmission module, which has a signal receiving end and a signal transmitting end, wherein the signal receiving end is signal-connected to the detection module; The control module is connected to the signal output terminal and the control module is connected to the closed drive structure (33) for control.

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