A garden maintenance construction device and method

Abstract

The application discloses a kind of garden maintenance construction device and method, it is related to garden maintenance equipment technical field, part of the application is increased by being arranged air curtain component, and is sent to nozzle by air duct, air guide ring, airflow tank one, airflow tank two, exhaust pipe one and exhaust pipe two and is sprayed, and it is formed to the wrapping air curtain in the periphery of mower knife;In the process of mowing, wrapping air curtain continues to be blown to the area around mower knife and rotating shaft by mowing, and it is cooperated with the guiding airflow formed by pneumatic guide vane, can effectively inhibit grass clippings, vine and damp weeds to rotate position gather winding, to reduce the probability of jamming and winding failure occurrence, improve equipment operation stability, and air entering is centrifugally pressurized using air guide turbine, and directional high-speed airflow is formed by directional exhaust hole and pneumatic guide vane, can timely blow and guide grass clippings after mower knife cuts weeds, reduce the accumulation of grass clippings in the inside of baffle frame and the case of adhering to the periphery of mower knife.

Description

Technical Field

[0001] This invention relates to the field of garden maintenance equipment technology, specifically to a garden maintenance construction device and method. Background Technology

[0002] With the continuous increase in urban greening, park landscapes, road green belts and residential green areas, lawn mowers, as commonly used trimming equipment in garden maintenance, are widely used in lawn trimming, weed clearing and greening maintenance. Existing lawn mowers usually use an engine to drive the mowing blades to rotate at high speed, using the blades to cut the weeds, and relying on the centrifugal force generated by the rotation of the blades to throw the cut grass clippings outward.

[0003] However, in actual use, due to the complex lawn environment, especially when there are many tall grasses, vines, or high moisture content in the grass clippings, the grass clippings produced by cutting tend to accumulate in the blade area. Some long grass fibers, vines, and damp grass clippings can also become entangled in the shaft, blade area, and blade connection points. As the amount of entanglement increases, it not only increases the operating resistance of the equipment and affects the normal cutting effect of the blades, but also easily causes poor grass discharge, equipment blockage, and even requires shutdown for cleaning, thereby reducing the continuous operation capacity and work efficiency of the equipment. In addition, most existing lawnmowers rely on the natural airflow generated by the rotation of the blades or centrifugal force to discharge grass, which has a weak airflow organization capability and cannot actively directionally transport and blow away the cut grass clippings. When grass clippings accumulate inside the equipment, they are easily drawn back into the blade area, which not only affects the grass discharge effect, but also further increases the risk of grass clippings entanglement and blockage. Summary of the Invention

[0004] In view of the problems in the prior art where lawn mowers tend to accumulate grass clippings in the blade area and long grass stems, vines, and damp grass clippings tend to get tangled around the shaft and blades, resulting in increased operating resistance, reduced grass removal efficiency, and the need for frequent shutdowns for cleaning, this invention provides a garden maintenance construction device and method.

[0005] The present invention is achieved through the following technical solution: a garden maintenance construction device, including a lawnmower, wherein the lawnmower is provided with an engine unit, the output end of the engine unit is equipped with a rotating shaft, the lawnmower is provided with a partition frame, the outer surface of the partition frame is provided with a discharge chute, and the partition frame is provided with a vortex booster assembly and an air curtain assembly, wherein the vortex booster assembly is used to generate boosted airflow; The air curtain assembly includes several air intake pipes and air guide rings. Several air intake pipes are installed on the outer surface of the vortex pressurization assembly. The bottom surfaces of several air intake pipes are jointly installed with air guide rings. A retaining ring is installed on the outer surface of the rotating shaft. An airflow groove is formed inside the retaining ring. The outer surface of the airflow groove is in contact with the outer surface of the air guide ring. An upper clamping plate is installed on the bottom surface of the retaining ring. An airflow groove is formed inside the upper clamping plate. A lower clamping plate is fixedly connected to the outer surface of the rotating shaft by bolts. A grass cutter is movably installed between the upper and lower clamping plates. Two exhaust pipes are installed on the outer surface of the upper clamping plate, and two exhaust pipes are installed on the outer surface of the lower clamping plate. A rubber plug is installed on one end of each of the two exhaust pipes. The outer surfaces of the two rubber plugs are in contact with the inner wall of the airflow groove. Several nozzles are evenly distributed on the outer surfaces of the two exhaust pipes and the two exhaust pipes, so that the pressurized airflow is discharged through the nozzles and forms a wrapping air curtain around the grass cutter.

[0006] Furthermore, the cyclone booster assembly includes a top air inlet and an air inlet guide shroud. Several top air inlets are evenly distributed inside the partition frame. An air inlet guide shroud is installed inside the partition frame. An air guide turbine is installed on the outer surface of the rotating shaft.

[0007] Furthermore, the outer surface of the air guide turbine is provided with several directional exhaust holes, and the outer surface of the air inlet guide shroud is evenly provided with several pneumatic guide vanes, which are inclined along the rotation direction of the air guide turbine.

[0008] Furthermore, several of the air ducts are evenly distributed along the circumference of the air guide turbine, and the air inlet end of the several air ducts is connected to the pressurized airflow output end of the swirl booster assembly.

[0009] Furthermore, the air guide ring is arranged in a ring structure, and the airflow grooves are continuously distributed along the circumference of the air guide ring to form a ring-shaped air storage channel.

[0010] Furthermore, the second airflow groove is disposed inside the upper clamping plate, and the second airflow groove is interconnected with the first airflow groove.

[0011] Furthermore, several nozzles are evenly distributed along the length of exhaust pipe one and exhaust pipe two, and the spray direction of the nozzles is inclined toward the rotation trajectory of the lawnmower.

[0012] Furthermore, a method for constructing a garden maintenance device includes the following steps: S1. Start the engine set. The engine set drives the rotating shaft to rotate. The rotating shaft drives the air guide turbine to rotate synchronously. External air enters the air intake shroud through the top air intake and then enters the area where the air guide turbine is located. The air guide turbine generates centrifugal pressure on the air to form a pressurized airflow. S2. The pressurized airflow is discharged outward through the directional exhaust hole opened on the outside of the air guide turbine. Part of the pressurized airflow is blown towards the discharge chute under the guidance of the pneumatic guide vane, so as to push the grass clippings produced by the grass cutter to move towards the discharge chute and be discharged. At the same time, another part of the pressurized airflow enters into several air ducts and is transported to the air guide ring. S3. Another part of the pressurized airflow enters the airflow slot 1 and airflow slot 2 through the air guide ring for storage and diversion. Then it enters the exhaust pipe 1 and exhaust pipe 2 respectively, and is sprayed out through several nozzles to form a wrapping air curtain around the mower blade. When the mower blade cuts weeds, the wrapping air curtain continuously blows the area around the mower blade. In conjunction with the guiding effect of the pneumatic guide vane, it makes it difficult for grass clippings to accumulate in the center of rotation, thereby reducing the probability of grass clippings getting tangled in the shaft and the mower blade.

[0013] The present invention has the following beneficial effects: (1) The garden maintenance construction device, by setting up an air curtain component, delivers part of the pressurized airflow through the air intake pipe, air guide ring, airflow groove one, airflow groove two, exhaust pipe one and exhaust pipe two to the nozzle and sprays it out, forming a wrapping air curtain around the grass cutter blade; during the grass cutting process, the wrapping air curtain continuously blows the grass cutter blade and the area around the rotating shaft, and cooperates with the guide airflow formed by the pneumatic guide plate, which can effectively inhibit grass clippings, vines and damp weeds from accumulating and entangled in the rotating part, thereby reducing the probability of blockage and entanglement failures and improving the stability of equipment operation.

[0014] (2) The garden maintenance construction device, by setting up a vortex pressurization component, uses a guide turbine to centrifugally pressurize the incoming air, and forms a directional high-speed airflow through the directional exhaust hole and pneumatic guide plate. After the grass cutter cuts the weeds, it can promptly blow and guide the grass clippings, so that the grass clippings are quickly discharged towards the discharge chute, reducing the accumulation of grass clippings inside the partition frame and the situation of them adhering to the grass cutter, thereby improving the grass discharge efficiency and the continuous operation capability of the equipment.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the lawnmower of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the partition frame of the present invention; Figure 3This is a schematic diagram of the overall structure of the partition frame of the present invention from another perspective; Figure 4 This is a schematic diagram of the overall structure of the cyclone booster assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the cyclone booster assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the cyclone booster assembly of the present invention from another perspective; Figure 7 This is a schematic diagram of a portion of the air curtain assembly of the present invention; Figure 8 This is a schematic diagram of the external structure of the lawnmower blade of the present invention; Figure 9 This is a schematic diagram of the external structure of the lawnmower blade of the present invention from another perspective.

[0017] In the diagram: 1. Lawn mower; 2. Engine assembly; 3. Shaft; 4. Baffle frame; 5. Swirl booster assembly; 501. Top air inlet; 502. Air inlet shroud; 503. Air guide turbine; 504. Pneumatic guide vane; 505. Directional exhaust port; 6. Air curtain assembly; 601. Air intake pipe; 602. Air guide ring; 603. Snap ring; 604. Airflow channel one; 605. Upper clamp; 606. Lower clamp; 607. Lawn mower blade; 608. Airflow channel two; 609. Exhaust pipe one; 610. Exhaust pipe two; 611. Rubber plug; 612. Nozzle; 7. Discharge chute. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0020] Please see Figures 1-9The present invention provides a technical solution: a garden maintenance construction device, including a lawnmower 1, an engine unit 2 inside the lawnmower 1, a rotating shaft 3 installed at the output end of the engine unit 2, a partition frame 4 inside the lawnmower 1, a discharge chute 7 on the outer surface of the partition frame 4, and a swirl booster assembly 5 and an air curtain assembly 6 inside the partition frame 4. The swirl booster assembly 5 is used to generate boosted airflow. The air curtain assembly 6 includes several air intake pipes 601 and air guide rings 602. Several air intake pipes 601 are installed on the outer surface of the vortex booster assembly 5. The bottom surfaces of several air intake pipes 601 are jointly installed with air guide rings 602. A retaining ring 603 is installed on the outer surface of the rotating shaft 3. An airflow groove 604 is opened inside the retaining ring 603. The outer surface of the airflow groove 604 is in contact with the outer surface of the air guide ring 602. An upper clamping plate 605 is installed on the bottom surface of the retaining ring 603. An airflow groove 608 is opened inside the upper clamping plate 605. A lower clamping plate 606 is fixedly connected to the outer surface of the rotating shaft 3 by bolts. A grass cutter 607 is movably installed between the upper clamping plate 605 and the lower clamping plate 606. Two exhaust pipes 609 are installed on the outer surface of the upper clamping plate 605, and two exhaust pipes 610 are installed on the outer surface of the lower clamping plate 606. A rubber plug 611 is installed on one end of each of the two exhaust pipes 610. The outer surfaces of the two rubber plugs 611 are in contact with the inner wall of the airflow channel 608. Several nozzles 612 are evenly distributed on the outer surfaces of the two exhaust pipes 609 and the two exhaust pipes 610, so that the pressurized airflow is discharged through the nozzles 612 and forms a wrapping air curtain around the mower blade 607. The pressurized airflow is generated by the vortex pressurization component 5, and the airflow is transported through the air intake pipe 601, the air guide ring 602, the airflow channel 604, the airflow channel 608, the exhaust pipes 609 and 610, so that the pressurized airflow can be stably transported to the nozzles 612 and sprayed out, thereby forming a continuous wrapping air curtain around the mower blade 607 to reduce the probability of grass clippings getting tangled in the mower blade 607.

[0021] The swirl booster assembly 5 includes a top air inlet 501 and an air inlet guide hood 502. Several top air inlets 501 are evenly distributed inside the partition frame 4. The air inlet guide hood 502 is installed inside the partition frame 4. An air guide turbine 503 is installed on the outer surface of the rotating shaft 3. Outside air is introduced through the top air inlet 501 and the air inlet guide hood 502 is used to guide the air to the area where the air guide turbine 503 is located, so that the air guide turbine 503 can perform centrifugal booster treatment on the incoming air, thereby providing an airflow power source for subsequent grass removal and anti-tangling.

[0022] The outer surface of the air guide turbine 503 is provided with several directional exhaust holes 505, and the outer surface of the air inlet guide shroud 502 is evenly distributed with several pneumatic guide vanes 504. The pneumatic guide vanes 504 are inclined along the rotation direction of the air guide turbine 503. The pressurized airflow generated by the air guide turbine 503 is released through the directional exhaust holes 505, and the airflow direction is guided and constrained by the pneumatic guide vanes 504, so that the exhaust airflow can be concentrated and blown out in a preset direction, thereby improving the efficiency of grass clipping conveying.

[0023] Several air intake pipes 601 are evenly distributed along the circumference of the air guide turbine 503. The air intake ends of the several air intake pipes 601 are connected to the pressurized airflow output end of the swirl pressurization component 5. The pressurized airflow is diverted and guided through the several air intake pipes 601, so that part of the pressurized airflow enters the interior of the air curtain component 6, thereby ensuring the airflow source required for the formation of the enveloping air curtain.

[0024] The air guide ring 602 is arranged in a ring structure, and the airflow grooves 604 are continuously distributed along the circumference of the air guide ring 602 to form a ring-shaped air storage channel. The ring structure of the air guide ring 602 and the airflow grooves 604 evenly distributes and buffers the incoming airflow, so that the airflow can be evenly transported along the circumference, thereby improving the air supply balance at each nozzle 612.

[0025] The second airflow channel 608 is located inside the upper clamping plate 605 and is connected to the first airflow channel 604. The second airflow channel 608 performs secondary storage and diversion of the airflow output from the first airflow channel 604, making the airflow pressure entering the first exhaust pipe 609 and the second exhaust pipe 610 more stable, thereby improving the continuity of the enveloping air curtain.

[0026] Several nozzles 612 are evenly distributed along the length of exhaust pipe 1 609 and exhaust pipe 2 610, and the spray direction of the nozzles 612 is inclined toward the rotation trajectory of the mower 607. The pressurized airflow is sprayed to the mower 607 through the several nozzles 612, and the inclined spray direction makes the sprayed airflow form a wrapping air curtain around the mower 607, thereby continuously blowing away the grass clippings produced by cutting and reducing the phenomenon of grass clippings accumulating and tangling.

[0027] A method for constructing a garden maintenance device includes the following steps: S1. Start engine 2. Engine 2 drives shaft 3 to rotate. Shaft 3 synchronously drives air guide turbine 503 to rotate. External air enters the air intake shroud 502 through top air inlet 501 and then enters the area where air guide turbine 503 is located. Air guide turbine 503 generates centrifugal pressurization effect on the air to form pressurized airflow. S2. The pressurized airflow is discharged outward through the directional exhaust hole 505 opened on the outside of the air guide turbine 503. Part of the pressurized airflow is blown towards the discharge trough 7 under the guidance of the pneumatic guide plate 504, so as to push the grass clippings produced by the grass cutter 607 to move towards the discharge trough 7 and be discharged. At the same time, another part of the pressurized airflow enters into several air ducts 601 and is transported to the air guide ring 602. S3. Another part of the pressurized airflow enters the airflow channel 604 and the airflow channel 608 through the air guide ring 602 for storage and diversion. Then it enters the exhaust pipe 609 and the exhaust pipe 610 respectively, and is sprayed out through several nozzles 612 to form a wrapping air curtain around the mower 607. When the mower 607 cuts weeds, the wrapping air curtain continuously blows the area around the mower 607. With the guidance of the pneumatic guide plate 504, it makes it difficult for grass clippings to accumulate in the center of rotation, thereby reducing the probability of grass clippings getting tangled in the shaft 3 and the mower 607.

[0028] The specific working process of this invention is as follows: When the lawnmower 1 is working, the engine unit 2 is started. The engine unit 2 drives the rotating shaft 3 to rotate at high speed. The rotating shaft 3 drives the air guide turbine 503, the upper clamping plate 605, the lower clamping plate 606 and the lawn mowing blade 607 to rotate synchronously. Outside air enters the equipment through the top air inlet 501 on the partition frame 4 and gathers in the area where the air guide shroud 502 is located under the guidance of the air inlet guide shroud 502.

[0029] As the guide turbine 503 continues to rotate at high speed, the incoming air is subjected to centrifugal force and moves to the outside of the guide turbine 503, so that the air obtains a higher flow velocity and pressure, thereby forming a pressurized airflow. The pressurized airflow is discharged outward through the directional exhaust hole 505 opened on the outside of the guide turbine 503. At this time, the pneumatic guide vane 504 set on the outside of the directional exhaust hole 505 guides and constrains the discharged airflow, preventing the airflow from spreading disorderly, and making the airflow blown out in a concentrated direction.

[0030] Part of the pressurized airflow is directly discharged to the mowing area through the directional exhaust hole 505. Since the pneumatic guide plate 504 directionally guides the airflow, the high-speed airflow can be blown towards the discharge chute 7. After the mowing blade 607 cuts the weeds, the grass clippings produced by the cutting are quickly moved towards the discharge chute 7 and discharged outside the equipment under the push of the main airflow, thereby reducing the accumulation of grass clippings inside the partition frame 4. At the same time, the high-speed airflow can also blow away the fine grass clippings and dust attached to the mowing blade 607, improving the grass discharge efficiency.

[0031] Meanwhile, another portion of the pressurized airflow enters the interior of several air ducts 601. These air ducts 601 are evenly distributed along the circumference of the air guide turbine 503, thus enabling a portion of the pressurized airflow to be evenly delivered into the air curtain assembly 6. The airflow entering the air ducts 601 then enters the air guide ring 602. Since the air guide ring 602 is arranged in a ring structure, it can perform ring distribution and pressure equalization of the airflow, ensuring a stable airflow supply to each area. The airflow distributed by the air guide ring 602 enters the first airflow slot 604, forming a first air storage space to buffer and stabilize the airflow. Subsequently, the airflow enters the second airflow slot 608 inside the upper clamping plate 605, forming a second air storage space, achieving secondary diversion and pressure equalization, thereby ensuring the pressure balance of the subsequent jet airflow.

[0032] When the lawn mower 607 rotates to cut weeds, the airflow stored in the first airflow slot 604 and the second airflow slot 608 enters the exhaust pipe 609 and the second exhaust pipe 610 respectively, and is ejected through a number of nozzles 612 distributed on the surface of the first exhaust pipe 609 and the second exhaust pipe 610. Since the spray direction of the nozzles 612 is tilted towards the rotation trajectory of the lawn mower 607, the ejected airflow will form a continuous enveloping air curtain around the lawn mower 607.

[0033] The enveloping air curtain primarily acts on the outside of the mowing blade 607. In conjunction with the guiding effect of the pneumatic guide vane 504, when long grass stems, vines, or damp grass clippings attempt to gather towards the rotating shaft 3, the annular enveloping air curtain and the guiding airflow can continuously sweep the area, disrupting the conditions for grass clipping to gather. This makes it difficult for grass clippings to adhere to the surfaces of the rotating shaft 3, the retaining ring 603, the upper clamping plate 605, and the lower clamping plate 606, thereby reducing the probability of grass clipping entanglement. The enveloping air curtain and the guiding airflow work together to allow the cut grass clippings to be quickly discharged from the equipment, improving the continuous operation capability and mowing efficiency of the equipment.

Claims

1. A garden maintenance construction device, comprising a lawnmower (1), wherein the lawnmower (1) is provided with an engine unit (2), the output end of the engine unit (2) is equipped with a rotating shaft (3), the lawnmower (1) is provided with a partition frame (4), and the outer surface of the partition frame (4) is provided with a discharge chute (7), characterized in that: The partition frame (4) is provided with a swirling pressurization component (5) and an air curtain component (6), wherein the swirling pressurization component (5) is used to generate pressurized airflow; The air curtain assembly (6) includes several air ducts (601) and air guide rings (602). Several air ducts (601) are installed on the outer surface of the vortex booster assembly (5). Air guide rings (602) are installed on the bottom surfaces of several air ducts (601). A retaining ring (603) is installed on the outer surface of the rotating shaft (3). An airflow groove (604) is opened inside the retaining ring (603). The outer surface of the airflow groove (604) is in contact with the outer surface of the air guide ring (602). An upper clamping plate (605) is installed on the bottom surface of the retaining ring (603). An airflow groove (608) is opened inside the upper clamping plate (605). A lower clamping plate (606) is fixedly connected to the outer surface of the rotating shaft (3) by bolts. A grass cutter (607) is movably installed between the upper clamping plate (605) and the lower clamping plate (606). Two exhaust pipes (609) are installed on the outer surface of the upper clamp (605), and two exhaust pipes (610) are installed on the outer surface of the lower clamp (606). A rubber plug (611) is installed on one end of each of the two exhaust pipes (610). The outer surfaces of the two rubber plugs (611) are in contact with the inner wall of the airflow groove (608). Several nozzles (612) are evenly distributed on the outer surfaces of the two exhaust pipes (609) and the two exhaust pipes (610) so that the pressurized airflow is discharged through the several nozzles (612) and forms a wrapping air curtain around the grass cutter (607).

2. The garden maintenance construction device according to claim 1, characterized in that: The cyclone booster assembly (5) includes a top air inlet (501) and an air inlet guide hood (502). Several top air inlets (501) are evenly distributed inside the partition frame (4). An air inlet guide hood (502) is installed inside the partition frame (4). A wind turbine (503) is installed on the outer surface of the rotating shaft (3).

3. The garden maintenance construction device according to claim 2, characterized in that: The outer surface of the air guide turbine (503) is provided with a number of directional exhaust holes (505), and the outer surface of the air inlet guide shroud (502) is evenly provided with a number of pneumatic guide vanes (504), which are inclined along the rotation direction of the air guide turbine (503).

4. The garden maintenance construction device according to claim 1, characterized in that: Several of the air ducts (601) are evenly distributed along the circumference of the air guide turbine (503), and the air inlet end of the several air ducts (601) is connected to the pressurized airflow output end of the swirl booster assembly (5).

5. A garden maintenance construction device according to claim 1, characterized in that: The air guide ring (602) is arranged in a ring structure, and the airflow groove (604) is continuously distributed along the circumference of the air guide ring (602) to form a ring-shaped gas storage channel.

6. A garden maintenance construction device according to claim 1, characterized in that: The second airflow groove (608) is located inside the upper clamping plate (605), and the second airflow groove (608) is connected to the first airflow groove (604).

7. A garden maintenance construction device according to claim 1, characterized in that: Several nozzles (612) are evenly distributed along the length of exhaust pipe one (609) and exhaust pipe two (610), and the spraying direction of the nozzles (612) is inclined toward the rotation trajectory of the grass cutter (607).

8. A method for constructing a garden maintenance device, applied to the garden maintenance device described in any one of claims 1-7, characterized in that: Includes the following steps: S1. Start the engine group (2). The engine group (2) drives the rotating shaft (3) to rotate. The rotating shaft (3) drives the air guide turbine (503) to rotate synchronously. External air enters the air intake shroud (502) through the top air inlet (501) and then enters the area where the air guide turbine (503) is located. The air guide turbine (503) generates centrifugal pressurization effect on the air to form pressurized airflow. S2. The pressurized airflow is discharged outward through the directional exhaust hole (505) opened on the outside of the air guide turbine (503). Part of the pressurized airflow is blown out towards the discharge trough (7) under the guidance of the pneumatic guide plate (504) to push the grass clippings produced by the grass cutter (607) to move towards the discharge trough (7) and be discharged. At the same time, another part of the pressurized airflow enters into several air ducts (601) and is transported to the air guide ring (602). S3. Another part of the pressurized airflow enters the airflow slot 1 (604) and airflow slot 2 (608) through the air guide ring (602) for storage and diversion. Then it enters the exhaust pipe 1 (609) and exhaust pipe 2 (610) respectively, and is sprayed out through several nozzles (612) to form a wrapping air curtain around the mower (607). When the mower (607) cuts the weeds, the wrapping air curtain continuously blows the area around the mower (607). With the guidance of the pneumatic guide plate (504), it makes it difficult for grass clippings to accumulate in the center of rotation, thereby reducing the probability of grass clippings entangled in the shaft (3) and the mower (607).

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