Mowing device

Abstract

The utility model provides a mowing device which comprises a machine shell, a cutting assembly, an air supplementing assembly, a differential transmission assembly and a height adjusting mechanism. A cutting motor of the cutting assembly is located at the machine cavity. A cutting driving shaft of the cutting motor is in driving connection with a cutting blade. The cutting driving shaft is sleeved with the air supplementing assembly; the differential transmission assembly is arranged at the machine cavity, the differential transmission assembly is used for driving the air supplementing assembly, the differential transmission assembly comprises a first transmission part and a differential driving part, the first transmission part is in linkage with the air supplementing assembly, and the differential driving part is in linkage with the first transmission part; the rotating speed of the air supplementing assembly is larger than that of the cutting blade. The height adjusting mechanism is in driving connection with the cutting assembly. The grass cutting device solves the problems that in the prior art, the passing efficiency in a machine cavity of a grass cutting device is low, and the grass cutting efficiency is poor, the grass cutting efficiency and the grass clippings conduction effect under the complex working condition are effectively improved, and it is ensured that all the components work cooperatively so as to achieve the optimal operation performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to afforestation equipment technical field, specifically, relate to a mowing device. BACKGROUND

[0002] The traditional mower is usually relied on the airflow generated by the rotary blade to discharge the cut grass through the cavity vortex to the grass outlet during the mowing operation. However, in the actual operation process, especially when encountering large cutting load or wet grass and other complex working conditions, a large amount of grass clippings can easily accumulate inside the cavity. Because of the wet weight, sticky green grass and too much dry debris may form an obstruction in the air duct, causing the grass clippings to flow slowly, increasing the airflow resistance, and causing the grass outlet to accumulate, reducing the air and material passing efficiency in the entire system. When the phenomenon of stagnation occurs, the blade has to work in an environment with greater resistance, which not only increases the energy consumption of the machine itself, but also significantly reduces the operating efficiency of the blade itself. Over time, it may affect the overall life and maintenance frequency of the equipment. In order to solve these problems and improve the overall operating efficiency, a mowing device is needed to reduce air duct obstruction, improve airflow speed and stability, and thus ensure continuous and efficient working ability. SUMMARY

[0003] The main purpose of the utility model is to provide a mowing device to solve the low passing efficiency and poor mowing efficiency of the cavity in the prior art, effectively improve the mowing efficiency and grass clippings conduction effect under complex working conditions, and ensure the cooperative work between the components to achieve the best operating performance.

[0004] To solve the above technical problems, one aspect of the utility model provides a mowing device, which comprises a machine shell, a cutting assembly, an air supplementing assembly, a differential transmission assembly and a height adjusting mechanism. The machine shell has a cavity. The cutting assembly comprises a cutting motor and a cutting blade. The cutting motor is located in the cavity, and the cutting drive shaft of the cutting motor is drivingly connected with the cutting blade, so that the cutting blade is rotatably arranged in the cavity. The air supplementing assembly is sleeved on the cutting drive shaft. The differential transmission assembly is arranged at the cavity, and is used for driving the air supplementing assembly, so that the rotating speed of the air supplementing assembly is greater than that of the cutting blade. The height adjusting mechanism is drivingly connected with the cutting assembly, and is used for adjusting the distance between the rotating surface of the cutting blade of the cutting assembly and the ground.

[0005] In this way, compared with the traditional design relying only on the rotation of the blade to generate airflow, the application generates limited airflow conditions. The air supplement assembly is sleeved on the cutting drive shaft and relies on the differential transmission assembly to achieve the effect of increasing pressure, thereby improving the gas flow efficiency. As a result, the rotation speed of the air supplement assembly is always greater than that of the cutting blade, effectively enhancing the circulation ability of the airflow in the machine cavity during the mowing operation of the mowing device, thereby not only strengthening the efficiency of the step-by-step pushing and expelling of grass clippings in the machine cavity, properly maintaining the unobstructed condition in the machine cavity, and improving the mowing efficiency of the mowing device, but also optimizing the collection effect of the grass clippings, avoiding the scattering of the grass clippings everywhere, and realizing the comprehensive upgrade of the clean and labor-saving ability, thereby improving the user's experience and satisfaction.

[0006] In addition, the cutting assembly and the air supplement assembly are independently designed, so that the mowing device can maintain good performance under different cutting requirements, thereby enhancing the adaptability and practicality of the mowing device.

[0007] Further, the introduction of the differential transmission assembly enables the mowing device to generate stronger airflow during the mowing operation, which is not only suitable for ordinary lawns but also can maintain efficient mowing and grass clipping collection in complex environments such as tall grass and wet grass, thereby improving the environmental adaptability of the mower. In this embodiment, this design enables the mowing device to maintain good working performance and grass clipping management effect in different grassland conditions, such as on the fine grassland of a golf course or in the tall grass of agricultural land, thereby greatly improving the mowing efficiency and user satisfaction.

[0008] In one embodiment, the differential transmission assembly includes a first transmission member and a differential drive member. The first transmission member is linked to the air supplement assembly, and the differential drive member is linked to the first transmission member and drives the first transmission member.

[0009] In this way, the first transmission member is linked to the air supplement assembly, and the differential drive member is linked to the first transmission member. The differential drive member drives the first transmission member, so that the rotation speed of the air supplement assembly is greater than that of the cutting blade. This effectively enhances the airflow intensity in the machine cavity during the mowing operation of the mowing device, improves the gas flow and flow rate in the machine cavity, not only improves the mowing efficiency of the mowing device, but also optimizes the collection effect of the grass clippings, avoids the scattering of the grass clippings everywhere, and improves the user's experience and satisfaction.

[0010] In one embodiment, the power source of the differential transmission assembly is the cutting assembly, the cutting drive shaft serves as the differential drive member, and the differential drive member is coaxially arranged with the air supplement assembly.

[0011] In this way, by taking the cutting driving shaft as a differential driving element, and by arranging the differential driving element coaxially with the air supplement assembly, the additional power device requirement is reduced, the overall structure of the mowing device is compact, the energy loss is minimized, the overall efficiency of the system is improved, the air supplement assembly can operate at a frequency greater than the blade rotation frequency, the internal air circulation is enhanced, the amplitude stress of the entire device is balanced, potential vibration or wear problems are avoided, the processing range of the traditional mowing device is effectively expanded, the load pressure on the operation caused by special conditions is reduced, complex tasks are handled calmly, the practical application space is widened, and the convenience and flexibility level is improved.

[0012] In one embodiment, the air supplement assembly includes a first air supplement fan and a transmission matching element, wherein the first air supplement fan is sleeved on the cutting driving shaft; the transmission matching element is connected with the first air supplement fan, and the transmission matching element is coupled with the first transmission element; wherein the end face of the axial end of the first air supplement fan is connected with the transmission matching element.

[0013] In this way, by arranging the air supplement assembly in the form of a first air supplement fan and a transmission matching element, the airflow thrust is enhanced in the high-speed rotation state, the end face is tightly combined with the transmission matching element, the possibility of local configuration bearing impact vibration is reduced, good rotation balance characteristics are achieved with minimum energy consumption, and the power transmission reliability of the differential transmission assembly is achieved.

[0014] In one embodiment, the first air supplement fan and the transmission matching element are integrally formed.

[0015] In this way, the overall structure of the air supplement assembly is simplified, the processing and manufacturing cost of the air supplement assembly is reduced, the assembly complexity and the risk of looseness or wear between components are reduced, the connection stability of the first air supplement fan and the transmission matching element of the air supplement assembly is improved, and under the coupling action of the transmission matching element and the first transmission element, the power is more directly and smoothly transmitted from the differential transmission assembly to the air supplement fan, the intermediate energy loss is reduced, and the air supplement effectiveness of the first air supplement fan is ensured.

[0016] Further, the integrally formed first air supplement fan and transmission matching part not only improves the structural strength of the air supplement assembly, reduces deformation caused by high-speed rotation, is suitable for mowing environments that need to be frequently moved and operated, such as agriculture, gardening, etc., in addition, it also reduces internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level during long-time high-intensity mowing operations, such as continuous work in large parks or golf courses, which improves the user's operation experience and also reduces the disturbance to the surrounding environment. The integrally formed first air supplement fan and transmission matching part ensure the structural rigidity of the air supplement assembly under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, which can effectively reduce structural deformation caused by high-speed rotation, maintain a stable working state, and prolong the service life of the mowing device.

[0017] In one embodiment, the first transmission part includes a first gear structure and a fixed frame, wherein the cutting drive shaft is drivingly connected with the first gear structure, the first gear structure has a first tooth structure; the fixed frame is arranged at the machine cavity, and the fixed frame is connected with the machine shell, the fixed frame is provided with at least two planetary gears, and each planetary gear has a second tooth structure for engaging with the first tooth structure; the transmission matching part includes a second gear structure, the second gear structure is sleeved on the cutting drive shaft, and the second gear structure has a third tooth structure for engaging with the second tooth structure.

[0018] In this way, by setting the first transmission part to include a first gear structure and a fixed frame, the first gear structure plays a role in power transmission, and the fixed frame plays a role in mounting and supporting the at least two planetary gears, ensuring the rotation reliability of the at least two planetary gears and the power transmission reliability, thereby achieving the purpose of setting the rotational speed of the air supplement assembly to be greater than the rotational speed of the cutting blade, and further ensuring that the flow rate and flow rate of the airflow in the machine cavity are effectively improved.

[0019] In one embodiment, the transmission ratio i of the differential transmission assembly satisfies: i>0.01; and / or, the rotational speed v1 of the cutting motor satisfies: 2000rpm≤v1≤5000rpm; and / or, the rotational speed v2 of the air supplement assembly satisfies: v2>2000 rpm.

[0020] Thus, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly and ensuring that i > 0.01, the mowing device of the application is provided with a differential transmission assembly, so that the rotational speed of the air supplement assembly is greater than that of the cutting blade, and efficient air flow can be provided during the cutting process. This air flow not only helps to quickly remove the cut grass clippings, but also helps to cool the cutting blade and the motor, reducing the temperature rise of the equipment caused by long-time high-load operation. In addition, by reasonably optimizing the value range of the rotational speed v1 of the cutting motor and ensuring that 2000 rpm ≤ v1 ≤ 5000 rpm, the high-speed airflow helps to stabilize the operation of the mower, reduces ground resistance and body vibration, and is beneficial to improving the fineness and maneuverability of mowing, avoiding the serious impact on the mowing efficiency of the mowing device caused by the too small rotational speed v1 of the cutting motor, and also avoiding the inability of the mowing device to effectively cut the grass during the mowing operation caused by the too large rotational speed v1 of the cutting motor. Further, by reasonably optimizing the value range of the rotational speed v2 of the air supplement assembly and ensuring that v2 > 2000 rpm, under the premise that the rotational speed of the air supplement assembly is greater than that of the cutting blade, the flow rate and flow rate of the airflow in the machine cavity cannot meet the requirements of mowing, thereby improving the mowing efficiency of the mowing device.

[0021] In one embodiment, the value range of the transmission ratio i of the differential transmission assembly satisfies: 0.2 ≤ i ≤ 0.7.

[0022] Thus, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly, the rotational speed of the air supplement assembly and the rotational speed of the cutting blade can be optimized according to different mowing requirements and environmental conditions, and it is suitable for various scenes from home gardens to professional lawn maintenance. In addition, the precise transmission ratio setting enables the mowing device to automatically adjust the optimal rotational speed of the air supplement assembly according to different grassland conditions and mowing requirements, whether it is small-scale mowing in a home garden or large-area maintenance of a professional lawn, efficient and accurate grass clippings collection and management can be achieved, and the multifunctionality and user convenience of the mowing device are improved.

[0023] In one embodiment, the rotational speed of the second gear structure is greater than that of the first gear structure.

[0024] Thus, a stronger airflow can be generated to assist cutting, improve mowing efficiency and grass clippings discharge efficiency, and achieve effective differential driving.

[0025] In one embodiment, the first gear structure is an internal meshing gear, the second gear structure is an external meshing gear, and the third gear structure is an external meshing gear; or, the first gear structure is an external meshing gear, the second gear structure is an external meshing gear, and the third gear structure is an internal meshing gear.

[0026] In this way, the cutting driving shaft drives the first gear structure to rotate, and the power is transmitted through the meshing of the first gear structure and the second gear structure, and further transmitted through the meshing of the second gear structure and the third gear structure, so as to drive the first air supplement fan.

[0027] In one embodiment, the mowing device further comprises a second air supplement fan, which is sleeved on the cutting driving shaft and connected with the axial end surface of the differential transmission assembly.

[0028] In this way, the second air supplement fan is arranged to rotate during the rotation of the cutting driving shaft driving the first gear structure, further improving the gas flow and gas flow rate in the machine cavity, thereby improving the mowing efficiency of the mowing device and further improving the mowing performance of the mowing device.

[0029] In one embodiment, the second air supplement fan is integrally formed with the first gear structure; and / or, the second air supplement fan is connected with the axial end surface of the first gear structure.

[0030] In this way, by integrally forming the second air supplement fan with the first gear structure, the structure is simplified, thereby reducing the processing and manufacturing cost of the mowing device, and the connection reliability between the second air supplement fan and the first gear structure is improved, thereby ensuring that the second air supplement fan rotates with the first gear structure.

[0031] In addition, in this embodiment, the addition of the second air supplement fan further enhances the strength and coverage range of the air flow, especially when the mowing area is large, it can effectively improve the collection efficiency of the grass clippings, and is suitable for mowing operations on large lawns or grasslands. The integrally formed second air supplement fan and the first gear structure not only ensure the structural strength of the air supplement assembly, but also optimize the air flow distribution, so that the mowing device can more effectively collect the grass clippings when processing large lawns, such as city parks and sports venues, reducing subsequent cleaning work and improving overall work efficiency.

[0032] In this way, by connecting the axial end surface of the second air supplement fan with the first gear structure, the connection of the two does not cause the overall structure of the mowing device to have a large peripheral size, ensuring the compactness of the overall structure of the mowing device while facilitating the miniaturization design of the mowing device.

[0033] In one embodiment, the fan blade diameter D1 of the air supplement assembly and the cutting diameter D of the cutting blade satisfy: 0.05≤D1 / D≤0.7.

[0034] Therefore, by reasonably optimizing the ratio of the fan blade diameter D1 of the air supplementing assembly to the cutting diameter D of the cutting blade, the radial gap of the air supplementing assembly and the cutting blade can be reasonably adjusted, so that the distribution of the airflow is optimized, the mowing device can effectively cut in a more quiet and efficient manner during the mowing operation, the mowing efficiency of the mowing device is ensured, and a more comfortable operation environment is provided for the user.

[0035] In another aspect, the utility model provides a kind of mowing device, including shell, cutting assembly, air supplementing assembly, differential transmission assembly and height adjusting mechanism, wherein, shell has machine cavity;Cutting assembly includes cutting motor and cutting blade, cutting motor is located at machine cavity, and the cutting drive shaft of cutting motor is drivenly connected with cutting blade, to make cutting blade rotatably be arranged in machine cavity;Air supplementing assembly is sleeved on cutting drive shaft;Differential transmission assembly is arranged at machine cavity, and differential transmission assembly is used to connect air supplementing assembly;Height adjusting mechanism is drivenly connected with cutting assembly, to be used for adjusting the distance between the rotation surface of the cutting blade of cutting assembly and ground.

[0036] Therefore, compared with the traditional design that only relies on the airflow generated by the rotation of the blade, the application achieves the effect of increasing the pressure and improving the gas flow efficiency by sleeving the air supplementing assembly on the cutting drive shaft and relying on the differential transmission assembly, so that the rotational speed of the air supplementing assembly is always greater than that of the cutting blade, effectively enhancing the circulation ability of the airflow in the machine cavity during the mowing operation of the mowing device, not only strengthening the efficiency of the grass clippings in the machine cavity, properly maintaining the smooth condition in the machine cavity, thereby improving the mowing efficiency of the mowing device, but also optimizing the collection effect of the grass clippings, avoiding the scattering of the grass clippings, realizing the comprehensive upgrade of the clean and labor-saving ability, and improving the user's experience.

[0037] In addition, by introducing the air supplementing motor, the mowing device can be flexibly adjusted according to different lawn conditions or different working modes, so that the air supplementing motor can adjust its output power according to the actual needs of the mowing process and maintain stable and efficient transmission, thereby realizing more accurate energy consumption control and ensuring the economic efficiency of the device. For example, when facing thicker lawn, the power of the air supplementing motor can be increased alone to enhance the airflow effect, without the need to replace or adjust the working condition of the cutting assembly. This independent transmission design of the air supplementing motor not only reduces the risk of mechanical failure caused by overload or imbalance, but also realizes power isolation, reduces noise and vibration, and improves the overall stability and comfort of the device.

[0038] In addition, the introduction of the differential transmission assembly enables the mower device to generate stronger airflow during mowing, which is not only suitable for ordinary lawns but also maintains high efficiency in mowing and grass clippings collection in complex environments such as tall grass and wet grass, thereby improving the environmental adaptability of the mower device.

[0039] Further, the introduction of the differential transmission assembly significantly increases the rotation speed of the air supplement assembly, effectively enhances the airflow intensity during mowing, improves the mowing efficiency, optimizes the collection effect of grass clippings, avoids the scattering of grass clippings, and improves the user experience. In addition, the independent design of the air supplement assembly and the cutting assembly enables the mower device to maintain good performance in different working environments, thereby enhancing the adaptability and practicality of the mower device.

[0040] In one embodiment, the differential transmission assembly includes a first transmission member and a differential drive member, the differential drive member being an air supplement motor, the air supplement motor being arranged at the machine cavity, the air supplement motor having a fan drive shaft, the fan drive shaft being linked with the first transmission member, and the first transmission member being linked with the air supplement assembly; the first transmission member is driven by the differential drive member to make the rotation speed of the air supplement assembly greater than that of the cutting blade.

[0041] In this way, the fan drive shaft is linked with the first transmission member, and the first transmission member is linked with the air supplement assembly; the first transmission member is driven by the differential drive member, so that the rotation speed of the air supplement assembly is greater than that of the cutting blade, effectively enhancing the airflow intensity in the machine cavity during the mowing operation of the mower device, improving the airflow volume and flow rate in the machine cavity, improving the mowing efficiency of the mower device, optimizing the collection effect of grass clippings, avoiding the scattering of grass clippings, and improving the user experience.

[0042] In one embodiment, the air supplement assembly has an axially directed air guide air duct and a radially directed air guide air duct in communication, the axially directed air guide air duct being in communication with the air inlet of the machine cavity, and the radially directed air guide air duct being in communication with the machine cavity.

[0043] In this way, by arranging the air supplement assembly in the form of an axially directed air guide air duct and a radially directed air guide air duct in communication, the air supplement inlet direction passes through the gap of the cutting assembly and / or enters the machine cavity through the air supplement assembly, ensuring the reliability of the air supplement of the air supplement assembly.

[0044] Further, the introduction of the axially directed air guide air duct and the radially directed air guide air duct further optimizes the guidance of the airflow, effectively guides the external air into the machine cavity, reasonably distributes the airflow in the machine cavity, and generates continuous and stable airflow, which helps to improve the overall aerodynamic efficiency, improves the efficiency of grass clippings collection, effectively cools the motor and other heat-sensitive components, avoids mechanical failure or efficiency reduction caused by high temperature, and reduces the influence of airflow disturbance on the cutting path of the blade, thereby increasing the cutting accuracy and work efficiency.

[0045] In one of the embodiments, the fan driving shaft is coaxial with the cutting driving shaft.

[0046] In this way, by setting the fan driving shaft and the cutting driving shaft in a coaxial structure, the fan driving shaft is driven to rotate the air supplement assembly through the first transmission member alone, ensuring the reliability of the rotation of the air supplement assembly, and the cutting driving shaft is driven to cut the cutting blade alone, thereby ensuring the reliability of the cutting operation of the cutting blade.

[0047] In one of the embodiments, the air supplement assembly comprises a first air supplement fan and a transmission matching member, wherein the first air supplement fan is sleeved on the cutting driving shaft; the transmission matching member is connected with the first air supplement fan, and the transmission matching member is coupled with the first transmission member.

[0048] In this way, by setting the air supplement assembly in a structure comprising a first air supplement fan and a transmission matching member, the airflow thrust is enhanced in a high-speed rotating state, the transmission matching member is tightly combined through the end face, which helps to reduce the possibility of local configuration bearing impact shock, realizes good rotating balance characteristics with minimum energy consumption, and plays a role in the power transmission reliability of the differential transmission assembly.

[0049] In one of the embodiments, the first air supplement fan and the transmission matching member are integrally formed.

[0050] In this way, it is beneficial to simplify the overall structure of the air supplement assembly, reduce the processing and manufacturing cost of the air supplement assembly, and at the same time, reduce the assembly complexity and the risk of looseness or wear between components, improve the connection stability of the first air supplement fan and the transmission matching member of the air supplement assembly, and ensure that the power is more direct and smooth when transmitted from the differential transmission assembly to the air supplement fan under the coupling action of the transmission matching member and the first transmission member, reducing intermediate energy loss, thereby ensuring the air supplement effectiveness of the first air supplement fan.

[0051] Further, the integrally formed first air supplement fan and transmission matching member not only improve the structural strength of the air supplement assembly, reduce deformation caused by high-speed rotation, are suitable for mowing environments that need to be frequently moved and operated, such as agriculture, gardening, etc., but also reduce internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level in a long time high-intensity mowing operation, for example, continuous work in large parks or golf courses, improving the user operation experience while reducing the interference to the surrounding environment. The integrally formed first air supplement fan and transmission matching member ensure the structural rigidity of the air supplement assembly under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, which can effectively reduce structural deformation caused by high-speed rotation, maintain a stable working state, and prolong the service life of the mowing device.

[0052] In one embodiment, the grass cutting device further comprises a third air supplement fan, which is sleeved on the cutting driving shaft and connected with the axial end face of the differential transmission assembly.

[0053] In this way, the addition of the third air supplement fan further enhances the strength and coverage of the air flow, especially when the grass cutting area is large, it can effectively improve the collection efficiency of the grass clippings, and is suitable for grass cutting operation of large lawns or grasslands.

[0054] In one embodiment, the transmission ratio i of the differential transmission assembly satisfies: i>1; and / or, the rotation speed v1 of the air supplement motor satisfies: v1>3000 rpm; and / or, the rotation speed v2 of the air supplement assembly satisfies: v2≤50000 rpm.

[0055] In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly and making i>1, the grass cutting device of the present application is added with the differential transmission assembly, so that the rotation speed of the air supplement assembly is greater than that of the cutting blade, which can provide efficient air flow during cutting. This air flow not only helps to quickly remove the cut grass clippings, but also helps to cool the cutting blade and the motor, reducing the temperature rise of the equipment caused by long-time high-load work; in addition, by reasonably optimizing the value range of the rotation speed v1 of the air supplement motor and making v1>3000 rpm, the high-speed air flow helps to stabilize the operation of the mower, reduces the ground resistance and body vibration, and is beneficial to improve the fineness and maneuverability of the grass cutting, ensuring the driving reliability of the air supplement motor to the air supplement assembly; in addition, by reasonably optimizing the value range of the rotation speed v2 of the air supplement assembly and making v2≤50000 rpm, under the premise of ensuring that the rotation speed of the air supplement assembly is greater than that of the cutting blade, it prevents the flow and flow rate of the air flow in the machine cavity from failing to meet the requirements of grass cutting due to the too small rotation speed v2 of the air supplement assembly, thereby improving the grass cutting efficiency of the grass cutting device.

[0056] In one embodiment, the transmission ratio i of the differential transmission assembly satisfies: 2≤i≤5.

[0057] In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly, the rotation speed of the air supplement assembly and the rotation speed of the cutting blade can be optimized according to different grass cutting requirements and environmental conditions, which is suitable for various scenes from home gardens to professional lawn maintenance; in addition, the accurate transmission ratio setting enables the grass cutting device to automatically adjust the optimal rotation speed of the air supplement assembly according to different grassland conditions and grass cutting requirements, whether it is small-range grass cutting in a home garden or large-area maintenance of a professional lawn, efficient and accurate collection and management of grass clippings can be realized, and the multifunctionality and user convenience of the grass cutting device are improved.

[0058] In one of the embodiments, the rotational speed v1 of the air supplement motor is in the range of 4000 rpm to 60000 rpm.

[0059] In this way, the independent design and high rotational speed of the air supplement motor enable the grass cutting device to maintain good performance in different working environments, enhancing the adaptability and practicality of the grass cutting device, and being suitable for various grass cutting needs, such as professional garden maintenance and agricultural work. In addition, the independent design of the air supplement motor, combined with its high rotational speed range, provides more flexible and efficient power support for the grass cutting device, especially in professional garden maintenance or agricultural work, which requires precise control of air supplement effect. The optimal working state can be adjusted according to actual needs to ensure the performance and practicality of the grass cutting device, meeting the diversified needs of professional grass cutting work.

[0060] In one of the embodiments, the ratio of the fan blade diameter D1 of the air supplement assembly to the cutting diameter D of the cutting blade is in the range of 0.05 to 0.7.

[0061] In this way, by reasonably optimizing the ratio of the fan blade diameter D1 of the air supplement assembly to the cutting diameter D of the cutting blade, the radial gap between the air supplement assembly and the cutting blade can be reasonably adjusted, thereby optimizing the distribution of air flow, ensuring that the grass cutting device can effectively cut in a more quiet and efficient manner during the grass cutting operation, and providing a more comfortable operating environment for the user.

[0062] In one of the embodiments, the first transmission member includes a first gear structure, the fan drive shaft is drivingly connected with the first gear structure, and the first gear structure has a first tooth structure; the transmission matching member includes a second gear structure, the second gear structure is sleeved on the cutting drive shaft, and the second gear structure has a third tooth structure for engaging with the first tooth structure; and the first air supplement fan is connected with an end face of an axial end of the second gear structure.

[0063] In this way, the first gear structure plays a role in power transmission, and the first gear structure is driven to rotate by the fan drive shaft, and the second gear structure is driven to rotate by the engagement of the first tooth structure and the third tooth structure, thereby driving the first air supplement fan to rotate.

[0064] In one of the embodiments, the first air supplement fan is integrally formed with the second gear structure.

[0065] Thus, the overall structure of the air supplement assembly is simplified, the manufacturing cost of the air supplement assembly is reduced, the connection stability of the first air supplement fan and the second gear structure of the air supplement assembly is improved, and the second gear structure reliably transmits power to the first air supplement fan under the coupling action of the second gear structure and the first transmission member, thereby ensuring the air supplement effectiveness of the first air supplement fan.

[0066] Further, the integrally formed first air supplement fan and second gear structure not only improve the structural strength of the air supplement assembly, reduce deformation caused by high-speed rotation, and are suitable for mowing environments that require frequent movement and operation, such as agriculture, gardening, etc., but also reduce internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level during long-time high-intensity mowing operations, such as continuous operation in large parks or golf courses, thereby improving the user operation experience and reducing the disturbance to the surrounding environment. The integrally formed first air supplement fan and second gear structure ensure the structural rigidity of the air supplement assembly under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, effectively reducing structural deformation caused by high-speed rotation, maintaining a stable working state, and prolonging the service life of the mowing device.

[0067] In one embodiment, the first transmission member includes a first transmission wheel, a second transmission wheel, and a transmission belt, wherein the fan drive shaft is drivingly connected to the first transmission wheel; the second transmission wheel is sleeved on the cutting drive shaft, and the air supplement assembly is connected to the end surface of the axial end of the second transmission wheel; and the two ends of the transmission belt are respectively sleeved on the outer circumferential side of the first transmission wheel and the second transmission wheel to drive the air supplement assembly to rotate by the second transmission wheel.

[0068] Thus, by setting the first transmission member to include a first transmission wheel, a second transmission wheel, and a transmission belt, the selection of the belt or chain transmission mode can provide more stable and efficient power transmission according to the specific design and use environment of the mowing device, and is suitable for various mowing device designs, such as hand-pushed, self-propelled, and remote-controlled mowing devices. In addition, the belt or chain transmission mode not only provides stable and efficient power transmission, but also optimizes the design of the mowing device, so that whether it is a hand-pushed, self-propelled, or remote-controlled mowing device, it can maintain a good working state and operation experience in various use environments, thereby enhancing the market competitiveness and user adaptability of the mowing device.

[0069] In one of the embodiments, the mowing device further comprises a controller, the controller comprising a detection module, a signal transmission module and a control module, wherein the detection module is electrically connected with the cutting assembly for acquiring the electrical signal of the cutting assembly; the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is signal connected with the detection module for receiving the electrical signal; the signal sending end is signal connected with the control module, and the control module is control connected with the air supplement motor, so that the control module adjusts the rotating speed of the air supplement motor in real time according to the electrical signal.

[0070] In this way, the rotating speed of the air supplement motor can be accurately controlled.

[0071] In one of the embodiments, the mowing device further comprises a detector and a controller, wherein the detector is electrically connected with the cutting assembly for acquiring the electrical signal of the cutting assembly; the controller comprises a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is signal connected with the detector for receiving the electrical signal; the signal sending end is signal connected with the control module, and the control module is control connected with the air supplement motor, so that the control module adjusts the rotating speed of the air supplement motor in real time according to the electrical signal.

[0072] In this way, the rotating speed of the air supplement motor can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0073] The accompanying drawings, which form a part of the specification, illustrate the present application and are used to explain the principles of the present application. The illustrative embodiments of the present application are described and explained so that this application can be understood.

[0074] Figure 1 Fig. 1 shows a sectional structure schematic diagram of a mowing device according to an embodiment of the present application;

[0075] Figure 2 Fig. 2 shows an enlarged structure schematic diagram of A in Fig. 1; Figure 1

[0076] Figure 3 Fig. 3 shows an exploded structure schematic diagram of a cutting assembly and a differential transmission assembly of the mowing device in Fig. 1; Figure 1

[0077] Figure 4 Fig. 4 shows a structure schematic diagram of a bottom view of the mowing device in Fig. 1; Figure 1

[0078] Figure 5 Fig. 5 shows an enlarged structure schematic diagram of B in Fig. 4; Figure 4

[0079] Figure 6 ​​​​A sectional structure schematic view of the mowing device is shown according to the embodiment two of the utility model;

[0080] Figure 7 A sectional structure schematic view of the mowing device is shown according to the embodiment two of the utility model; Figure 6 An enlarged structure schematic view at C in the above-mentioned is shown.

[0081] Figure 8 An enlarged structure schematic view at C in the above-mentioned is shown. Figure 6 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown.

[0082] Figure 9 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown. Figure 6 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown.

[0083] Figure 10 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown. Figure 9 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown.

[0084] Figure 11 An exploded structure schematic view of the cutting assembly and transmission assembly of the mowing device in the above-mentioned is shown.

[0085] Wherein, the above-mentioned drawing includes the following sign:

[0086] 10, the casing; 11, the machine cavity; 12, the accommodating cavity;

[0087] 20, the cutting assembly; 21, the cutting motor; 211, the cutting drive shaft; 22, the cutting blade;

[0088] 30, the air supplement assembly; 31, the first air supplement fan; 32, the transmission cooperation piece; 321, the second gear structure; 3211, the third tooth structure; 33, the axial air guide duct; 34, the radial air guide duct;

[0089] 40, the differential transmission assembly; 401, the first transmission piece; 41, the first gear structure; 411, the first tooth structure; 42, the fixed frame; 421, the planetary gear; 4211, the second tooth structure; 402, the air supplement motor; 44, the fan drive shaft;

[0090] 50, the second air supplement fan;

[0091] 60, the spiral retaining ring; 70, the flange structure; 80, the gasket structure; 90, the locking bolt. DETAILED DESCRIPTION

[0092] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0093] As Figure 11 shown, through research, it is found that the high-speed area in the grass discharge port area of the cutting device is usually located in the middle of the grass discharge port downward, and the overall high-speed area range accounts for a low proportion of the area of the grass discharge port. In addition, due to the wet weight, the viscosity of the grass, and too much dry debris, an obstruction may be formed in the air duct, causing the flow speed of the grass debris to slow down, increasing the flow resistance of the airflow, and further causing the accumulation phenomenon to occur at the grass discharge port, and this accumulation phenomenon reacts on the vortex of the machine cavity 11, reducing the passing efficiency of air and matter in the entire system. When the jamming phenomenon occurs, the cutting blade 22 has to work in an environment with greater resistance, which not only increases the energy consumption of the machine itself, but also significantly reduces the operating efficiency of the cutting blade 22 itself. Over a long period of time, it may affect the overall life and maintenance frequency of the equipment. In order to solve these problems and improve the overall operating efficiency, a grass cutting device is needed to reduce the air duct obstruction phenomenon, improve the airflow speed and stability, and thus ensure the continuous and efficient working ability.

[0094] Specifically, Figure 11 (a) is a simulation schematic diagram in which the rotating speed of the air supplement assembly 30 is the same as the rotating speed of the cutting blade 22, (b) is a simulation schematic diagram in which the rotating speed of the air supplement assembly 30 is greater than the rotating speed of the cutting blade 22, (c) is the wind speed distribution at the grass discharge port corresponding to the case of (a), and (d) is the wind speed distribution at the grass discharge port corresponding to the case of (b). It can be known that the increase of the rotating speed of the air supplement assembly 30 is beneficial to improve the wind speed of the grass discharge port and the distribution of the high-speed area, and the distribution of the high-speed area can achieve the purpose of reducing the occurrence of the extrusion phenomenon. Embodiment

[0095] As Figures 1 to 5As shown, the grass cutting device comprises a casing 10, a cutting assembly 20, an air supplementing assembly 30, a differential transmission assembly 40 and a height adjusting mechanism, wherein the casing 10 has a machine cavity 11; the cutting assembly 20 comprises a cutting motor 21 and a cutting blade 22, the cutting motor 21 is located at the machine cavity 11, and a cutting driving shaft 211 of the cutting motor 21 is drivingly connected with the cutting blade 22, so that the cutting blade 22 is rotatably arranged in the machine cavity 11; the air supplementing assembly 30 is sleeved on the cutting driving shaft 211; the differential transmission assembly 40 is arranged at the machine cavity 11, and is used for driving the air supplementing assembly 30, so that the rotating speed of the air supplementing assembly 30 is greater than the rotating speed of the cutting blade 22; the height adjusting mechanism is drivingly connected with the cutting assembly 20, and is used for adjusting the distance between the rotating surface of the cutting blade 22 of the cutting assembly 20 and the ground.

[0096] Compared with the traditional design which only relies on the rotation of the blade to generate airflow, the present application generates limited airflow conditions. The air supplementing assembly 30 is sleeved on the cutting driving shaft 211, and relies on the differential transmission assembly 40 to achieve the effect of increasing pressure and improving the efficiency of gas flow. Therefore, the rotating speed of the air supplementing assembly 30 is always greater than the rotating speed of the cutting blade 22, which effectively enhances the circulating ability of the airflow in the machine cavity 11 during the grass cutting operation of the grass cutting device. Not only does it strengthen the efficiency of the grass clippings being pushed and expelled in the machine cavity 11, but it also maintains the smooth condition in the machine cavity 11, thereby improving the grass cutting efficiency of the grass cutting device. In addition, it optimizes the collection effect of the grass clippings, avoids the grass clippings from flying everywhere, and realizes the comprehensive upgrade of the clean and labor-saving ability, thereby improving the user's experience.

[0097] In addition, the cutting assembly 20 and the air supplementing assembly 30 are independently designed, so that the grass cutting device can maintain good performance under different cutting requirements, thereby enhancing the adaptability and practicality of the grass cutting device.

[0098] Further, the introduction of the differential transmission assembly 40 enables the grass cutting device to generate stronger airflow during the grass cutting operation, which is not only suitable for ordinary lawns, but also can maintain efficient grass cutting and grass clippings collection in complex environments such as high grass and wet grass, thereby improving the environmental adaptability of the grass cutting machine. In this embodiment, this design enables the grass cutting device to maintain good working performance and grass clippings management effect when facing different grass conditions, such as on the fine grass of a golf course or in the high grass of agricultural land, thereby greatly improving the grass cutting efficiency and user satisfaction.

[0099] As Figures 1 to 5As shown, the differential transmission assembly 40 includes a first transmission member 401 and a differential drive member, the first transmission member 401 is linked with the air supplement assembly 30, and the differential drive member is linked with the first transmission member 401; the first transmission member 401 is driven by the differential drive member. In this way, by linking the first transmission member 401 with the air supplement assembly 30, the differential drive member is linked with the first transmission member 401; the first transmission member 401 is driven by the differential drive member, so that the rotating speed of the air supplement assembly 30 is greater than that of the cutting blade 22, effectively enhancing the airflow intensity in the machine cavity 11 during the mowing operation of the mowing device, while improving the airflow and flow rate in the machine cavity 11, not only improving the mowing efficiency of the mowing device, but also optimizing the collection effect of the grass clippings, avoiding the grass clippings from flying everywhere, and improving the user's experience.

[0100] As shown in Figure 2 , the machine shell 10 also has a containing cavity 12, and the cutting motor 21 is located at the communication position of the machine cavity 11 and the containing cavity 12.

[0101] In this embodiment, the power source of the differential transmission assembly 40 is the cutting assembly 20, the cutting drive shaft 211 serves as the differential drive member, and the differential drive member is coaxially arranged with the air supplement assembly 30. In this way, by taking the cutting drive shaft 211 as the differential drive member, and at the same time the differential drive member is coaxially arranged with the air supplement assembly 30, it is beneficial to reduce the demand for additional power devices, so as to make the overall structure of the mowing device compact, maximize the energy loss, thereby improving the overall efficiency of the system, and at the same time the air supplement assembly can operate at a frequency greater than that of the blade, not only enhancing the internal air circulation but also assisting in balancing the amplitude stress of the entire device, avoiding potential shock or wear and tear problems, effectively expanding the processing range of traditional mowing devices and reducing the load pressure on the operation under special conditions, calmly coping with complex tasks and widening the practical application space conveniently and flexibly.

[0102] As shown in Figure 2 and 3 , the air supplement assembly 30 includes a first air supplement fan 31 and a transmission matching member 32, wherein the first air supplement fan 31 is sleeved on the cutting drive shaft 211; the transmission matching member 32 is connected with the first air supplement fan 31, and the transmission matching member 32 is coupled with the first transmission member 401; wherein the first air supplement fan 31 is connected with the end face of the axial end of the transmission matching member 32. In this way, by setting the air supplement assembly 30 to include the first air supplement fan 31 and the transmission matching member 32, the airflow thrust is enhanced in the high-speed rotating state, and by tightly combining the end face to the transmission matching member 32, it is helpful to reduce the possibility of local configuration bearing impact shock, realize good rotation balance characteristics with minimum energy consumption, and play the power transmission reliability of the differential transmission assembly 40.

[0103] Optionally, the first air supplement fan 31 and the transmission matching piece 32 are integrally formed. In this way, it is beneficial to simplify the overall structure of the air supplement assembly 30, reduce the processing and manufacturing cost of the air supplement assembly 30, at the same time, reduce the assembly complexity and the risk of looseness or wear between components, improve the connection stability of the first air supplement fan 31 and the transmission matching piece 32 of the air supplement assembly 30, and ensure that the power is more directly and smoothly transmitted from the differential transmission assembly 40 to the air supplement fan under the coupling action of the transmission matching piece 32 and the first transmission member 401, thereby reducing the intermediate energy loss, and ensuring the air supplement effectiveness of the first air supplement fan 31.

[0104] Further, the integrally formed first air supplement fan 31 and the transmission matching piece 32 not only improve the structural strength of the air supplement assembly 30, reduce the deformation caused by high-speed rotation, are suitable for mowing environments that need to be frequently moved and operated, such as agriculture, gardening, etc., in addition, also reduce internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level in a long time of high-intensity mowing operation, for example, continuous work in a large park or a golf course, improve the user operation experience, at the same time, also reduce the interference to the surrounding environment, the integrally formed first air supplement fan 31 and the transmission matching piece 32 ensure the structural rigidity of the air supplement assembly 30 under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, which can effectively reduce the structural deformation caused by high-speed rotation, maintain a stable working state, and prolong the service life of the mowing device.

[0105] As shown in Figures 2 to 5 The first transmission member 401 includes a first gear structure 41 and a fixed frame 42, wherein the cutting drive shaft 211 is drivingly connected with the first gear structure 41, the first gear structure 41 has a first tooth structure 411; the fixed frame 42 is arranged at the machine cavity 11, and the fixed frame 42 is connected with the machine shell 10, and at least two planetary gears 421 are arranged on the fixed frame 42, and each planetary gear 421 has a second tooth structure 4211 for engaging with the first tooth structure 411; the transmission matching piece 32 includes a second gear structure 321, the second gear structure 321 is sleeved on the cutting drive shaft 211, and the second gear structure 321 has a third tooth structure 3211 for engaging with the second tooth structure 4211. In this way, by arranging the first transmission member 401 in the form of the first gear structure 41 and the fixed frame 42, the first gear structure 41 plays a role in power transmission, and the fixed frame 42 plays a role in mounting and supporting the at least two planetary gears 421, ensuring the rotation reliability of the at least two planetary gears 421 and the power transmission reliability, thereby achieving the purpose of setting the rotating speed of the air supplement assembly 30 to be greater than the rotating speed of the cutting blade 22, and further ensuring that the flow and flow rate of the airflow in the machine cavity 11 are effectively improved.

[0106] As shown in Figures 2 to 5 The fixed frame 42 is arranged at the communication between the machine cavity 11 and the accommodating cavity 12.

[0107] In the embodiment, the transmission ratio i of the differential transmission assembly 40 satisfies: i > 0.01; and / or, the rotation speed v1 of the cutting motor 21 satisfies: 2000 rpm≤v1≤5000 rpm; and / or, the rotation speed v2 of the air supplement assembly 30 satisfies: v2>2000 rpm. In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly 40 and making i>0.01, the mowing device of the application is added with the differential transmission assembly 40, so that the rotation speed of the air supplement assembly 30 is greater than that of the cutting blade 22, which can provide efficient air flow during cutting. This air flow not only helps to quickly remove the cut grass clippings, but also helps to cool the cutting blade 22 and the motor, reducing the equipment temperature rise caused by long-time high-load work; in addition, by reasonably optimizing the value range of the rotation speed v1 of the cutting motor 21 and making 2000 rpm≤v1≤5000 rpm, the high-speed airflow helps to stabilize the operation of the mower, reduces the ground resistance and body vibration, and is beneficial to improve the fineness and maneuverability of mowing, avoids the serious impact on the mowing efficiency of the mowing device caused by the too small rotation speed v1 of the cutting motor 21, and also avoids the situation that the rotation speed v1 of the cutting motor 21 is too large, so that the mowing device cannot effectively cut the grass during the mowing operation; further, by reasonably optimizing the value range of the rotation speed v2 of the air supplement assembly 30 and making v2>2000 rpm, under the premise that the rotation speed of the air supplement assembly 30 is greater than that of the cutting blade 22, it prevents the situation that the flow and speed of the airflow in the machine cavity 11 cannot meet the requirements of mowing due to the too small rotation speed v2 of the air supplement assembly 30, thereby improving the mowing efficiency of the mowing device.

[0108] Preferably, the transmission ratio i of the differential transmission assembly 40 satisfies: 0.2≤i≤0.7. In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly 40, the rotation speed of the air supplement assembly 30 and the rotation speed of the cutting blade 22 can be optimized according to different mowing requirements and environmental conditions, which is suitable for various scenes from home gardens to professional lawn maintenance; in addition, the accurate transmission ratio setting enables the mowing device to automatically adjust the optimal rotation speed of the air supplement assembly 30 according to different grassland conditions and mowing requirements, whether it is small-range mowing in a home garden or large-area maintenance of a professional lawn, efficient and accurate grass clippings collection and management can be realized, and the multifunctionality and user convenience of the mowing device are improved.

[0109] Further, the rotation speed v1 of the cutting motor 21 satisfies the range of 2000 rpm≤v1≤5000 rpm. In this way, the high rotation speed of the cutting motor 21 can provide a faster mowing effect, which is suitable for occasions requiring fast mowing, such as commercial lawn maintenance, sports grounds, etc. In addition, in the occasions requiring fast mowing, such as commercial lawn maintenance or sports grounds, the use of the high rotation speed cutting motor 21 can significantly improve the mowing speed while ensuring the smoothness and uniformity of the mowing effect, meeting the dual demands of speed and quality for professional mowing operations.

[0110] Further, the rotation speed v2 of the air supplement assembly 30 satisfies the range of v2>2000 rpm. In this way, the high rotation speed of the air supplement assembly 30 can generate a stronger airflow, which not only improves the mowing efficiency but also optimizes the collection of grass clippings, which is suitable for occasions requiring efficient grass clipping management, such as parks, large green spaces, etc. In addition, the high rotation speed of the air supplement assembly 30 enables the mowing device to quickly concentrate and collect the cut grass clippings in occasions requiring efficient grass clipping management, such as parks or large green spaces, thereby avoiding the scattering of grass clippings and maintaining the cleanliness of the mowing area, which improves the environmental performance and user satisfaction of the mowing device.

[0111] Further, the rotation speed of the second gear structure 321 is greater than that of the first gear structure 41. In this way, a stronger airflow can be generated to assist cutting, improve mowing efficiency and grass clipping discharge efficiency, and achieve effective differential driving.

[0112] As shown in FIG. 1, Figures 3 to 5 The first tooth structure 411 is an internal meshing tooth, the second tooth structure 4211 is an external meshing tooth, and the third tooth structure 3211 is an external meshing tooth. In this way, the cutting drive shaft 211 ensures the rotation of the first gear structure 41, the power transmission is achieved through the meshing action of the first tooth structure 411 and the second tooth structure 4211, and further, the power transmission is continued through the meshing action of the second tooth structure 4211 and the third tooth structure 3211, thereby achieving the driving of the first air supplement fan 31.

[0113] In an embodiment not shown in the drawings of the present application, the first tooth structure 411 is an external meshing tooth, the second tooth structure 4211 is an external meshing tooth, and the third tooth structure 3211 is an internal meshing tooth. In this way, the cutting drive shaft 211 ensures the rotation of the first gear structure 41, the power transmission is achieved through the meshing action of the first tooth structure 411 and the second tooth structure 4211, and further, the power transmission is continued through the meshing action of the second tooth structure 4211 and the third tooth structure 3211, thereby achieving the driving of the first air supplement fan 31.

[0114] As shown in FIG. 1, Figure 3As shown, the mowing device further comprises a second air supplement fan 50, which is sleeved on the cutting driving shaft 211 and connected with the axial end face of the differential transmission assembly 40. In this way, the arrangement of the second air supplement fan 50 enables the second air supplement fan 50 to rotate during the rotation of the cutting driving shaft 211 driven by the first gear structure 41, further improving the gas flow and gas flow rate in the machine cavity 11, thereby improving the mowing efficiency of the mowing device and further improving the mowing performance of the mowing device.

[0115] It should be noted that, in an embodiment of the present application, the second air supplement fan 50 is integrally formed with the first gear structure 41. In this way, by adopting the structure of integrally forming the second air supplement fan 50 with the first gear structure 41, the structure is simplified, thereby reducing the processing and manufacturing cost of the mowing device, and the connection reliability between the second air supplement fan 50 and the first gear structure 41 is improved, thereby ensuring that the second air supplement fan 50 rotates with the first gear structure 41 during the rotation of the first gear structure 41.

[0116] In addition, in the present embodiment, the addition of the second air supplement fan 50 further enhances the strength and coverage range of the air flow, especially when the mowing area is large, which can effectively improve the collection efficiency of the grass clippings, and is suitable for mowing operations on large lawns or grasslands. The integrally formed second air supplement fan 50 and the first gear structure 41 not only ensure the structural strength of the air supplement assembly 30, but also optimize the air flow distribution, so that the mowing device can more effectively collect the grass clippings when processing large lawns, such as city parks and sports venues, reducing the subsequent cleaning work and improving the overall work efficiency.

[0117] It should be noted that, in another embodiment of the present application, the second air supplement fan 50 is connected with the axial end face of the first gear structure 41. In this way, by adopting the structure of connecting the second air supplement fan 50 with the axial end face of the first gear structure 41, it is ensured that the connection of the two will not cause the overall structure of the mowing device to have a large peripheral size, ensuring the compactness of the overall structure of the mowing device while facilitating the miniaturization design of the mowing device.

[0118] It should be noted that, in the present embodiment, the fan blade diameter D1 of the air supplement assembly 30 and the cutting diameter D of the cutting blade 22 satisfy: 0.05≤D1 / D≤0.7. In this way, by reasonably optimizing the value range of the ratio of the fan blade diameter D1 of the air supplement assembly 30 to the cutting diameter D of the cutting blade 22, it is beneficial to reasonably adjust the radial gap between the air supplement assembly 30 and the cutting blade 22, thereby optimizing the distribution of the air flow, so that the mowing device can ensure the mowing efficiency of the mowing device while ensuring that the mowing device can as much as possible in a more quiet and efficient way to effectively cut, providing a more comfortable operating environment for the user.

[0119] Preferably, the fan diameter D1 of the air supplementing assembly 30 and the cutting diameter D of the cutting blade 22 satisfy the following relationship: D1 / D = 0.3. In this way, by reasonably optimizing the ratio of the fan diameter D1 of the air supplementing assembly 30 and the cutting diameter D of the cutting blade 22, the air flow coordination between the air supplementing assembly 30 and the cutting assembly 20 is ensured, which is suitable for different sizes of mowing areas, such as family gardens, public green spaces, etc. In addition, by optimizing the ratio of the fan diameter of the air supplementing assembly 30 and the cutting diameter of the cutting blade 22, the mowing device can provide the best air flow coordination effect in different sizes of mowing areas, whether it is small-range mowing in a family garden or large-area operation in a public green space, it can maintain high mowing efficiency and grass clippings collection, and is suitable for the needs of various mowing scenarios.

[0120] In the embodiment, as shown in Figure 2 and 3 , the mowing device further comprises a flange structure 70, a gasket structure 80, and a locking bolt 90. After the flange structure 70 is sleeved on the cutting drive shaft 211, the cutting blade 22 is sleeved on the cutting drive shaft 211, the gasket structure 80 is padded at the geometric center of the cutting blade 22, and the locking bolt 90 passes through the through hole on the gasket structure 80 and is connected with the cutting drive shaft 211. Embodiment

[0121] As shown in Figures 6 to 10 , the mowing device comprises a housing 10, a cutting assembly 20, an air supplementing assembly 30, a differential transmission assembly 40, and a height adjusting mechanism. The housing 10 has a cavity 11. The cutting assembly 20 comprises a cutting motor 21 and a cutting blade 22. The cutting motor 21 is located at the cavity 11, and the cutting drive shaft 211 of the cutting motor 21 is drivingly connected with the cutting blade 22, so that the cutting blade 22 is rotatably arranged in the cavity 11. The air supplementing assembly 30 is sleeved on the cutting drive shaft 211. The differential transmission assembly 40 is arranged at the cavity 11 and is used for connecting the air supplementing assembly 30. The height adjusting mechanism is drivingly connected with the cutting assembly 20, and is used for adjusting the distance between the rotation surface of the cutting blade 22 of the cutting assembly 20 and the ground.

[0122] Compared with the traditional design relying only on the rotation of the blade to generate airflow, the present application generates limited airflow conditions. The air supplement assembly 30 is set on the cutting drive shaft 211, and relies on the differential transmission assembly 40 to achieve the effect of increasing pressure and improving gas flow efficiency. The rotational speed of the air supplement assembly 30 is always greater than that of the cutting blade 22, effectively enhancing the circulation ability of the airflow in the machine cavity 11 during the mowing process of the mowing device, not only strengthening the efficiency of the grass clippings being pushed and expelled in the machine cavity 11, but also maintaining the smooth condition in the machine cavity 11, thereby improving the mowing efficiency of the mowing device, optimizing the collection effect of the grass clippings, avoiding the scattering of the grass clippings, and achieving the comprehensive upgrade of the clean and labor-saving ability, thereby improving the user's experience.

[0123] In addition, by introducing the air supplement motor 402, the mowing device can be flexibly adjusted according to different lawn conditions or different working modes. The air supplement motor 402 can adjust its output power according to the actual needs of the mowing process and maintain stable and efficient transmission, thereby realizing more accurate energy consumption control and ensuring the economic efficiency of the device operation. For example, when facing thicker lawns, the power of the air supplement motor 402 can be increased alone to enhance the airflow effect, without the need to replace or adjust the working conditions of the cutting assembly 20. The independent transmission design of the air supplement motor 402 not only reduces the risk of mechanical failure caused by overload or imbalance, but also realizes power isolation, reduces noise and vibration, and improves the overall stability and comfort of the device.

[0124] In addition, by introducing the differential transmission assembly 40, the mowing device can generate stronger airflow during mowing, which is not only suitable for ordinary lawns, but also can maintain efficient mowing and grass clippings collection in complex environments such as tall grass and wet grass, thereby improving the environmental adaptability of the mowing device.

[0125] Further, by introducing the differential transmission assembly 40, the rotational speed of the air supplement assembly 30 is significantly improved, effectively enhancing the airflow intensity of the mowing device during the mowing process, not only improving the mowing efficiency, but also optimizing the collection effect of the grass clippings, avoiding the scattering of the grass clippings, and improving the user experience. In addition, the independent design of the air supplement assembly 30 and the cutting assembly 20 enables the mowing device to maintain good performance in different working environments, thereby enhancing the adaptability and practicality of the mowing device.

[0126] For example, Figures 6 to 10As shown, the differential transmission assembly 40 includes a first transmission member 401 and a differential drive member, which is a supplementary air fan 402, the supplementary air fan 402 is arranged at the machine cavity 11, the supplementary air fan 402 has a fan drive shaft 44, the fan drive shaft 44 is linked with the first transmission member 401, and the first transmission member 401 is linked with the supplementary air assembly 30; the first transmission member 401 is driven by the differential drive member to make the rotation speed of the supplementary air assembly 30 greater than the rotation speed of the cutting blade 22. In this way, the fan drive shaft 44 is linked with the first transmission member 401, the first transmission member 401 is linked with the supplementary air assembly 30; the first transmission member 401 is driven by the differential drive member, so that the rotation speed of the supplementary air assembly 30 is greater than the rotation speed of the cutting blade 22, effectively enhancing the airflow intensity in the machine cavity 11 during the mowing operation of the mowing device, while improving the airflow and flow rate in the machine cavity 11, not only improving the mowing efficiency of the mowing device, but also optimizing the collection effect of the grass clippings, avoiding the grass clippings from flying everywhere, and improving the user's experience.

[0127] As shown in Figure 6 and Figure 7 , the supplementary air assembly 30 has an axially connected axial air guide duct 33 and a radial air guide duct 34, the axial air guide duct 33 is connected with the air inlet of the machine cavity 11, and the radial air guide duct 34 is connected with the machine cavity 11. In this way, by arranging the supplementary air assembly 30 in the form of an axially connected axial air guide duct 33 and a radial air guide duct 34, the air inlet direction of the supplementary air passes through the gap of the cutting assembly 20, and / or enters the machine cavity 11 through the supplementary air assembly 30, ensuring the reliability of the supplementary air of the supplementary air assembly 30.

[0128] Further, the introduction of the axial air guide duct 33 and the radial air guide duct 34 further optimizes the guidance of the airflow, which can effectively guide the external air into the machine cavity 11 and reasonably distribute the airflow in the machine cavity 11, and generate a continuous and stable airflow, which helps to improve the overall aerodynamic efficiency, improve the efficiency of grass clippings collection, and effectively cool the motor and other heat-sensitive components, avoid mechanical failure or efficiency reduction caused by high temperature, and also reduce the influence of airflow disturbance on the cutting path of the blade, increase the cutting accuracy and working efficiency.

[0129] In this embodiment, the fan drive shaft 44 is differentially arranged with the cutting drive shaft 211. In this way, by arranging the fan drive shaft 44 and the cutting drive shaft 211 in the form of different shafts, the fan drive shaft 44 drives the supplementary air assembly 30 to rotate through the first transmission member 401, ensuring the rotation reliability of the supplementary air assembly 30, and the cutting drive shaft 211 drives the cutting blade 22, thereby ensuring the cutting operation reliability of the cutting blade 22.

[0130] As shown in Figures 7 to 10As shown, the air supplement assembly 30 comprises a first air supplement fan 31 and a transmission matching part 32, wherein the first air supplement fan 31 is sleeved on the cutting driving shaft 211; the transmission matching part 32 is connected with the first air supplement fan 31, and the transmission matching part 32 is coupled with the first transmission part 401. In this way, by setting the air supplement assembly 30 in a structure form comprising the first air supplement fan 31 and the transmission matching part 32, the airflow thrust in the high-speed rotating state is enhanced, and by being tightly combined with the transmission matching part 32, the possibility of local configuration bearing impact shock is reduced, good rotating balance characteristics are achieved with minimum energy consumption, and the power transmission reliability of the differential transmission assembly 40 is achieved.

[0131] Optionally, the first air supplement fan 31 and the transmission matching part 32 are integrally formed. In this way, it is beneficial to simplify the overall structure of the air supplement assembly 30, reduce the processing and manufacturing cost of the air supplement assembly 30, and at the same time, reduce the assembly complexity and the risk of looseness or wear between components, improve the connection stability of the first air supplement fan 31 and the transmission matching part 32 of the air supplement assembly 30, and ensure that the power is more directly and smoothly transmitted from the differential transmission assembly 40 to the air supplement fan under the coupling action of the transmission matching part 32 and the first transmission part 401, reducing intermediate energy loss, thereby ensuring the air supplement effectiveness of the first air supplement fan 31.

[0132] Further, the integrally formed first air supplement fan 31 and transmission matching part 32 not only improve the structural strength of the air supplement assembly 30 and reduce deformation caused by high-speed rotation, but are also suitable for mowing environments that need to be frequently moved and operated, such as agriculture, gardening, etc. In addition, it also reduces internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level in a long time high-intensity mowing operation, such as continuous work in large parks or golf courses, improving the user operation experience while reducing the interference to the surrounding environment. The integrally formed first air supplement fan 31 and transmission matching part 32 ensure the structural rigidity of the air supplement assembly 30 under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, which can effectively reduce structural deformation caused by high-speed rotation, maintain a stable working state, and prolong the service life of the mowing device.

[0133] It should be noted that in an embodiment of the application not shown in the drawings, the mowing device further comprises a third air supplement fan, the third air supplement fan is sleeved on the cutting driving shaft 211 and connected with the differential transmission assembly 40; or, the third air supplement fan is connected with the second air supplement fan 50, the differential transmission assembly 40 drives the second air supplement fan 50 to rotate, and the third air supplement fan rotates; the third air supplement fan can be integrally formed with the second air supplement fan 50; or, the third air supplement fan is connected with the second air supplement fan 50 through a transmission structure including but not limited to gear teeth and the like. In this way, the addition of the third air supplement fan further enhances the strength and coverage range of the airflow, especially when the mowing area is large, it can effectively improve the collection efficiency of the grass clippings, and is suitable for mowing operations on large lawns or grasslands.

[0134] Optionally, the third air supplement fan is connected with the axial end face of the differential transmission assembly 40.

[0135] Further, the integrally formed third air supplement fan and the first gear structure 41 not only ensure the structural strength of the air supplement assembly 30, but also optimize the airflow distribution, so that the mowing device can more effectively collect the grass clippings when processing large lawns, such as city parks and sports venues, reducing subsequent cleaning work and improving overall work efficiency.

[0136] In this embodiment, the transmission ratio i of the differential transmission assembly 40 satisfies i>1; and / or, the rotational speed v1 of the air supplement motor 402 satisfies v1>3000 rpm; and / or, the rotational speed v2 of the air supplement assembly 30 satisfies v2≤50000 rpm. In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly 40 and making i>1, the mowing device of the application is provided with the differential transmission assembly 40, so that the rotational speed of the air supplement assembly 30 is greater than the rotational speed of the cutting blade 22, which can provide efficient air flow during cutting. This airflow not only helps to quickly remove the cut grass clippings, but also helps to cool the cutting blade 22 and the motor, reducing the equipment temperature rise caused by long-time high-load work; in addition, by reasonably optimizing the value range of the rotational speed v1 of the air supplement motor 402 and making v1>3000 rpm, the high-speed airflow helps to stabilize the operation of the mower, reduces the ground resistance and body vibration, and is beneficial to improve the fineness and maneuverability of mowing, ensuring the driving reliability of the air supplement motor 402 to the air supplement assembly 30; in addition, by reasonably optimizing the value range of the rotational speed v2 of the air supplement assembly 30 and making v2≤50000 rpm, on the premise that the rotational speed of the air supplement assembly 30 is greater than the rotational speed of the cutting blade 22, the flow rate and flow velocity of the airflow in the machine cavity 11 cannot meet the requirements of mowing due to the too small rotational speed v2 of the air supplement assembly 30, thereby improving the mowing efficiency of the mowing device.

[0137] Further, through the value range of the rotation speed v2 of the air supplement assembly 30 under the driving of the air supplement motor 402, the high-rotation-speed air supplement assembly 30 can generate stronger airflow, further optimizing the collection of grass clippings, and being suitable for occasions with strict requirements for grass clippings management, such as golf courses, high-end residential areas, etc. In addition, in occasions with strict requirements for grass clippings management, such as golf courses or high-end residential areas, the high-rotation-speed design of the air supplement assembly 30 not only can generate stronger airflow to effectively optimize the collection of grass clippings, but also can reduce the impact of grass clippings on the operation of the mowing device during mowing, improving the convenience of operation and the aesthetic appearance of the mowing effect, and meeting the user's pursuit of high-quality mowing experience.

[0138] Preferably, the value range of the transmission ratio i of the differential transmission assembly 40 satisfies: 2≤i≤5. In this way, by reasonably optimizing the value range of the transmission ratio i of the differential transmission assembly 40, the rotation speed of the air supplement assembly 30 and the rotation speed of the cutting blade 22 can be optimized according to different mowing requirements and environmental conditions, and the differential transmission assembly 40 is suitable for various scenes from family gardens to professional lawn maintenance. In addition, the precise transmission ratio setting enables the mowing device to automatically adjust the optimal rotation speed of the air supplement assembly 30 according to different grass conditions and mowing requirements, whether it is small-range mowing in a family garden or large-area maintenance of a professional lawn, efficient and accurate collection and management of grass clippings can be achieved, and the multifunctionality and user convenience of the mowing device are improved.

[0139] Preferably, the value range of the rotation speed v1 of the air supplement motor 402 satisfies: 4000rpm≤v1≤60000rpm. In this way, the independent design and high rotation speed of the air supplement motor 402 enable the mowing device to maintain good performance in different working environments, enhancing the adaptability and practicality of the mowing device, and being suitable for various mowing requirements, such as professional garden maintenance, agricultural operations, etc. In addition, the independently designed air supplement motor 402, combined with its high rotation speed range, provides the mowing device with more flexible and efficient power support, especially in occasions requiring precise control of air supplement effect, such as professional garden maintenance or agricultural operations, the optimal working state can be adjusted according to actual requirements, ensuring the performance and practicality of the mowing device, and meeting the diversified needs of professional mowing operations.

[0140] It should be noted that in the embodiment, the fan diameter D1 of the air supplement assembly 30 and the cutting diameter D of the cutting blade 22 satisfy: 0.05≤D1 / D≤0.7. In this way, by reasonably optimizing the value range of the ratio of the fan diameter D1 of the air supplement assembly 30 to the cutting diameter D of the cutting blade 22, the radial gap of the air supplement assembly 30 and the cutting blade 22 can be reasonably adjusted, so as to optimize the distribution of the air flow, so that the mowing device can ensure the mowing efficiency of the mowing device while ensuring that the mowing device can cut as quietly and efficiently as possible during the mowing operation, thereby providing a more comfortable operating environment for the user.

[0141] Preferably, the fan diameter D1 of the air supplement assembly 30 and the cutting diameter D of the cutting blade 22 satisfy: D1 / D=0.3. In this way, by reasonably optimizing the ratio of the fan diameter D1 of the air supplement assembly 30 to the cutting diameter D of the cutting blade 22, the air flow coordination between the air supplement assembly 30 and the cutting assembly 20 is ensured, which is suitable for different sizes of mowing areas, such as family gardens, public green spaces, etc. In addition, by optimizing the ratio of the fan diameter of the air supplement assembly 30 to the cutting diameter of the cutting blade 22, the mowing device can provide the best air flow coordination effect in different sizes of mowing areas, whether it is small-range mowing in a family garden or large-area operation in a public green space, it can maintain high mowing efficiency and grass clippings collection, and is suitable for various mowing scene requirements.

[0142] As shown in Figures 7 to 10 The first transmission member 401 includes a first gear structure 41, the fan drive shaft 44 is drivingly connected with the first gear structure 41, and the first gear structure 41 has a first tooth structure 411; the transmission matching member 32 includes a second gear structure 321, the second gear structure 321 is sleeved on the cutting drive shaft 211, and the second gear structure 321 has a third tooth structure 3211 for engaging with the first tooth structure 411; wherein the first air supplement fan 31 is connected with the end face of the axial end of the second gear structure 321. In this way, the first gear structure 41 plays a role of power transmission, drives the first gear structure 41 to rotate through the fan drive shaft 44, and drives the second gear structure 321 to rotate through the meshing cooperation of the first tooth structure 411 and the third tooth structure 3211, thereby driving the first air supplement fan 31 to rotate.

[0143] Optionally, the first air supplement fan 31 is integrally formed with the second gear structure 321. In this way, it is beneficial to simplify the overall structure of the air supplement assembly 30, reduce the processing and manufacturing cost of the air supplement assembly 30, and at the same time, it is also possible to improve the connection stability of the first air supplement fan 31 and the second gear structure 321 of the air supplement assembly 30, and under the coupling action of the second gear structure 321 and the first transmission member 401, it is ensured that the second gear structure 321 reliably transmits power to the first air supplement fan 31, thereby ensuring the air supplement effectiveness of the first air supplement fan 31.

[0144] Further, the integrally formed first air supplement fan 31 and second gear structure 321 not only improve the structural strength of the air supplement assembly 30, reduce deformation caused by high-speed rotation, and are suitable for mowing environments that need to be frequently moved and operated, such as agriculture, gardening, etc., but also reduce internal friction and noise, so that the mowing device can maintain a stable working state and a low noise level during long-time high-intensity mowing operations, such as continuous work in large parks or golf courses, improving the user operation experience while reducing the disturbance to the surrounding environment. The integrally formed first air supplement fan 31 and second gear structure 321 ensure the structural rigidity of the air supplement assembly 30 under high-speed rotation, especially in agricultural or gardening scenarios, such as frequent movement in different plots or terrains, which can effectively reduce structural deformation caused by high-speed rotation, maintain a stable working state, and prolong the service life of the mowing device.

[0145] It should be noted that in an embodiment of the present application not shown in the figure, the first transmission member 401 includes a first transmission wheel, a second transmission wheel, and a transmission belt, wherein the fan drive shaft 44 is drivingly connected with the first transmission wheel; the second transmission wheel is sleeved on the cutting drive shaft 211, and the air supplement assembly 30 is connected with the end face of the axial end of the second transmission wheel; the two ends of the transmission belt are respectively sleeved on the outer circumferential side of the first transmission wheel and the second transmission wheel, so as to drive the air supplement assembly 30 to rotate through the second transmission wheel. In this way, by setting the first transmission member 401 to include a first transmission wheel, a second transmission wheel, and a transmission belt structure, the selection of the belt or chain transmission mode can provide more stable and efficient power transmission according to the specific design and use environment of the mowing device, which is suitable for various mowing device designs, such as hand-push type, self-propelled type, remote control type, etc. In addition, the transmission mode of the belt or chain not only provides stable and efficient power transmission, but also optimizes the design of the mowing device, so that whether it is a hand-push type, a self-propelled type, or a remote control type mowing device, it can maintain a good working state and operation experience in various use environments, enhancing the market competitiveness and user adaptability of the mowing device.

[0146] Further, the mowing device further comprises a controller, the controller comprising a detection module, a signal transmission module and a control module, wherein the detection module is electrically connected with the cutting assembly 20 to obtain the electrical signal of the cutting assembly 20; the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is signal-connected with the detection module to receive the electrical signal; the signal sending end is signal-connected with the control module, and the control module is control-connected with the air supplement motor 402 to make the control module adjust the rotating speed of the air supplement motor 402 in real time according to the electrical signal. In this way, it is beneficial to realize the accurate regulation and control of the rotating speed of the air supplement motor 402.

[0147] Further, the mowing device further comprises a detector and a controller, wherein the detector is electrically connected with the cutting assembly 20 to obtain the electrical signal of the cutting assembly 20; the controller comprises a signal transmission module and a control module, wherein the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is signal-connected with the detector to receive the electrical signal; the signal sending end is signal-connected with the control module, and the control module is control-connected with the air supplement motor 402 to make the control module adjust the rotating speed of the air supplement motor 402 in real time according to the electrical signal. In this way, it is beneficial to realize the accurate regulation and control of the rotating speed of the air supplement motor 402.

[0148] Optionally, the active control mode can be that an electric signal control or a mechanical control of a key / handle in a push rod, an APP interface operation or the like is provided by a control panel or the like control part of the mowing device, or the air supplement intensity of the air supplement machine is adaptively adjusted according to the air supplement signal of the equipment and / or according to working condition parameters: grass height, grassland humidity, grass density; cutting parameters: cutting gear, cutting load, cutting current, cutting speed; whole machine running parameters: equipment height adjustment gear, walking speed / rotating speed, and the like.

[0149] Optionally, the control part can be a control panel, of course, can also be a control button, or a touch screen panel.

[0150] Optionally, the air supplement signal is adjusted according to the actual cutting working condition (distance from the ground, lawn density, lawn humidity, and the like), and / or the air supplement intensity of the air supplement machine is adaptively provided according to working condition parameters: grass height, grassland humidity, grass density; cutting parameters: cutting gear, cutting load, cutting current, cutting speed; whole machine running parameters: equipment height adjustment gear, walking speed / rotating speed, and the like, to adaptively increase the rotating speed to superimpose and accelerate the airflow in the air duct, thereby improving the grass clippings flow efficiency in the air duct.

[0151] In the embodiment, as Figure 7 and 8As shown, the mowing device also includes a spiral retaining ring 60, a gasket structure 80, and a locking bolt 90. After the spiral retaining ring 60 is fitted onto the cutting drive shaft 211, the cutting blade 22 is then fitted onto the cutting drive shaft 211. The gasket structure 80 is then placed at the geometric center of the cutting blade 22. The locking bolt 90 passes through the through hole on the gasket structure 80 and is connected to the cutting drive shaft 211.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0156] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an either chronological or spatial relation. Rather, these terms can be used solely to distinguish a certain specific entity from another entity. It should be understood that the terms so used in the description are interchangeable under appropriate circumstances and embodiments of the application described herein are capable of operating in other sequences than described or illustrated herein.

[0157] The preferred embodiments of the present application have been described above with the specific embodiments. The present application is not limited to the above embodiments. It will be appreciated by those skilled in the art that any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A grass cutting device, characterised in that, The application relates to a mowing device, which comprises the following components: a casing (10) having a machine cavity (11); a cutting assembly (20) comprising a cutting motor (21) and a cutting blade (22), the cutting motor (21) being arranged at the machine cavity (11), and a cutting driving shaft (211) of the cutting motor (21) being drivingly connected with the cutting blade (22) so that the cutting blade (22) is rotatably arranged in the machine cavity (11); an air supplement assembly (30) sleeved on the cutting driving shaft (211); a differential transmission assembly (40) arranged at the machine cavity (11) and used for driving the air supplement assembly (30) so that the rotating speed of the air supplement assembly (30) is greater than that of the cutting blade (22); a height adjusting mechanism drivingly connected with the cutting assembly (20) and used for adjusting the distance between the rotating surface of the cutting blade (22) of the cutting assembly (20) and the ground.

2. The grass cutting device of claim 1, wherein The differential transmission assembly (40) comprises a first transmission member (401) and a differential driving member, the first transmission member (401) being linked with the air supplement assembly (30), and the differential driving member being linked with the first transmission member (401) and driving the first transmission member (401) through the differential driving member.

3. The grass cutting device of claim 2, wherein The power source of the differential transmission assembly (40) is the cutting assembly (20), the cutting driving shaft (211) is used as the differential driving member, and the differential driving member is coaxially arranged with the air supplement assembly (30).

4. The grass cutting device of claim 3, wherein The air supplement assembly (30) comprises: a first air supplement fan (31) sleeved on the cutting driving shaft (211); a transmission matching member (32) connected with the first air supplement fan (31) and coupled with the first transmission member (401); wherein the first air supplement fan (31) is connected with the end surface of the axial end of the transmission matching member (32).

5. The grass cutting device of claim 4, wherein The first air supplement fan (31) and the transmission matching member (32) are integrally formed.

6. The mowing device according to claim 4, wherein the first transmission member (401) comprises: a first gear structure (41) drivingly connected with the cutting driving shaft (211), the first gear structure (41) having a first gear structure (411); a fixing frame (42) arranged at the machine cavity (11) and connected with the casing (10), the fixing frame (42) being provided with at least two planetary gears (421), and each of the planetary gears (421) having a second gear structure (4211) used for meshing with the first gear structure (411); the transmission matching member (32) comprises: A second gear structure (321) is sleeved on the cutting driving shaft (211), and the second gear structure (321) has a third tooth structure (3211) for engaging with the second tooth structure (4211).

7. The grass cutting device according to any one of claims 1 to 6, characterized in that, a transmission ratio i of the differential transmission assembly (40) satisfies i > 0.01; and / or, a rotation speed v1 of the cutting motor (21) satisfies 2000 rpm < v1 < 5000 rpm; and / or, a rotation speed v2 of the air supplement assembly (30) satisfies v2 > 2000 rpm.

8. The grass cutting device according to claim 7, characterized in that, a transmission ratio i of the differential transmission assembly (40) satisfies 0.2 < i < 0.

7.

9. The grass cutting device of claim 6, wherein A rotation speed of the second gear structure (321) is greater than a rotation speed of the first gear structure (41).

10. The grass cutting device according to claim 6, characterized in that, the first tooth structure (411) is an internal meshing tooth structure, the second tooth structure (4211) is an external meshing tooth structure, and the third tooth structure (3211) is an external meshing tooth structure; or, the first tooth structure (411) is an external meshing tooth structure, the second tooth structure (4211) is an external meshing tooth structure, and the third tooth structure (3211) is an internal meshing tooth structure.

11. The grass cutting device of claim 9, wherein The grass cutting device further comprises: a second air supplement fan (50) sleeved on the cutting driving shaft (211) and connected with an axial end surface of the differential transmission assembly (40).

12. The grass cutting device according to claim 11, characterized in that, the second air supplement fan (50) is integrally formed with the first gear structure (41); and / or, the second air supplement fan (50) is connected with an axial end surface of the first gear structure (41).

13. The grass cutting device according to any one of claims 1 to 6, 8 to 12, characterized in that, a fan blade diameter D1 of the air supplement assembly (30) and a cutting diameter D of the cutting blade (22) satisfy 0.05 < D1 / D < 0.

7.

14. A grass cutting device characterised in that, comprises: a casing (10) having a machine cavity (11); a cutting assembly (20) comprising a cutting motor (21) and a cutting blade (22), the cutting motor (21) being located at the machine cavity (11), and a cutting driving shaft (211) of the cutting motor (21) being drivingly connected with the cutting blade (22) so that the cutting blade (22) is rotatably arranged in the machine cavity (11); an air supplement assembly (30) sleeved on the cutting driving shaft (211); a differential transmission assembly (40) arranged at the machine cavity (11) and used for connecting the air supplement assembly (30). A height adjustment mechanism is drivingly connected with the cutting assembly (20) for adjusting the distance between the rotary plane of the cutting blade (22) of the cutting assembly (20) and the ground.

15. The grass cutting device according to claim 14, characterized in that, The differential transmission assembly (40) comprises a first transmission member (401) and a differential drive member, which is a wind compensation motor (402), the wind compensation motor (402) is arranged at the machine cavity (11), the wind compensation motor (402) has a fan driving shaft (44), the fan driving shaft (44) is linked with the first transmission member (401), and the first transmission member (401) is linked with the wind compensation assembly (30); The first transmission member (401) is driven by the differential drive member to make the rotating speed of the wind compensation assembly (30) greater than the rotating speed of the cutting blade (22).

16. The grass cutting device of claim 14, wherein The wind compensation assembly (30) has an axial air guide duct (33) and a radial air guide duct (34) connected in communication, the axial air guide duct (33) is in communication with the air inlet of the machine cavity (11), and the radial air guide duct (34) is in communication with the machine cavity (11).

17. The grass cutting device of claim 15, wherein, The fan driving shaft (44) is different in axis from the cutting driving shaft (211).

18. The grass cutting device of claim 17, wherein, The wind compensation assembly (30) comprises: A first wind compensation fan (31) is sleeved on the cutting driving shaft (211); A transmission matching member (32) is connected with the first wind compensation fan (31), and the transmission matching member (32) is coupled with the first transmission member (401).

19. The grass cutting device of claim 18, wherein, The first wind compensation fan (31) and the transmission matching member (32) are integrally formed.

20. The grass cutting device of claim 14, wherein, The grass cutting device further comprises: A third wind compensation fan is sleeved on the cutting driving shaft (211) and connected with the axial end surface of the differential transmission assembly (40).

21. The grass cutting device according to claim 15, characterized in that, The transmission ratio i of the differential transmission assembly (40) satisfies i>1; and / or, The rotating speed v1 of the wind compensation motor (402) satisfies v1>3000 rpm; and / or, The rotating speed v2 of the wind compensation assembly (30) satisfies v2≤50000 rpm.

22. The grass cutting device according to claim 21, characterized in that, The transmission ratio i of the differential transmission assembly (40) satisfies 2≤i≤5.

23. The grass cutting device according to claim 21, characterized in that, The rotating speed v1 of the wind compensation motor (402) satisfies 4000 rpm≤v1≤60000 rpm.

24. The grass cutting device according to claim 14, characterized in that, The fan blade diameter D1 of the wind compensation assembly (30) and the cutting diameter D of the cutting blade (22) satisfy 0.05≤D1 / D≤0.

7.

25. The grass cutting device according to claim 18, characterized in that, The first transmission member (401) comprises: A first gear structure (41), the fan drive shaft (44) is in driving connection with the first gear structure (41), and the first gear structure (41) has a first gear structure (411); The transmission matching member (32) comprises: A second gear structure (321), the second gear structure (321) is sleeved on the cutting drive shaft (211), and the second gear structure (321) has a third gear structure (3211) for meshing with the first gear structure (411); The first air supplement fan (31) is connected with the end face of the axial one end of the second gear structure (321).

26. The grass cutting device of claim 25, wherein, The first air supplement fan (31) is integrally formed with the second gear structure (321).

27. The grass cutting device according to claim 18, characterized in that The first transmission member (401) comprises: A first transmission wheel, the fan drive shaft (44) is in driving connection with the first transmission wheel; A second transmission wheel, the second transmission wheel is sleeved on the cutting drive shaft (211), and the air supplement assembly (30) is connected with the end face of the axial one end of the second transmission wheel; A transmission belt, both ends of the transmission belt are sleeved on the outer circumferential side of the first transmission wheel and the second transmission wheel respectively, so as to drive the air supplement assembly (30) to rotate through the second transmission wheel.

28. The lawn mower of claim 15, wherein, The grass cutting device further comprises: A controller, the controller comprises: A detection module, the detection module is electrically connected with the cutting assembly (20) to acquire an electrical signal of the cutting assembly (20); A signal transmission module, the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is in signal connection with the detection module to receive the electrical signal; A control module, the signal sending end is in signal connection with the control module, and the control module is in control connection with the air supplement motor (402), so that the control module adjusts the rotating speed of the air supplement motor (402) in real time according to the electrical signal.

29. The lawn mower of claim 15, wherein, The grass cutting device further comprises: A detector, the detector is electrically connected with the cutting assembly (20) to acquire an electrical signal of the cutting assembly (20); A controller, the controller comprises: A signal transmission module, the signal transmission module has a signal receiving end and a signal sending end, the signal receiving end is in signal connection with the detector to receive the electrical signal; A control module, the signal sending end is in signal connection with the control module, and the control module is in control connection with the air supplement motor (402), so that the control module adjusts the rotating speed of the air supplement motor (402) in real time according to the electrical signal.

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