Lawn mower and grass residue removing method thereof

Abstract

The invention provides a mowing machine which comprises a chassis and an air pressure cavity, and the air pressure cavity is arranged on the first side close to the chassis; the cutter head assembly is arranged on the first side of the base plate and is close to the air pressure cavity; wherein gas enters the air pressure cavity, and the air pressure cavity deforms, so that deposits attached to the bottom of the air pressure cavity fall off. The invention further provides a grass residue removing method of the mower.

Description

Technical Field

[0001] The present application relates to a lawn mower and a method for removing grass residues using the lawn mower. Background Art

[0002] Common lawn mowers clean the lawn by setting a rotating blade on the chassis. During operation, grass residue usually accumulates on the chassis. A large amount of grass residue accumulation will cause the blade to rotate at a lower speed, which will affect the efficiency of cleaning. One way to clean grass residue is to set up a water tank and clean it by spraying water. However, this method will increase the weight of the device and lead to greater energy loss. Summary of the invention

[0003] The present application provides a lawn mower, which comprises: A lawn mower comprising: Chassis; An air pressure chamber, the air pressure chamber being disposed on a first side close to the chassis; A cutter disc assembly, the cutter disc assembly being disposed on a first side of the chassis and close to the air pressure chamber; The gas enters the air pressure chamber, and the air pressure chamber is deformed, so that the deposits attached to the bottom of the air pressure chamber fall off. The lawn mower provided in the embodiment of the present application is provided with an air pressure chamber on the first side of the chassis, and the air pressure chamber is configured to be deformed when the gas is filled, so that the grass residues attached to the chassis generated by the blade disc assembly during operation can fall off with the deformation of the inflation chamber, thereby achieving the cleaning of the grass residues attached to the chassis.

[0004] In one embodiment, the air pressure chamber has an elastic layer, which is disposed on the first side of the chassis and forms a sealed air pressure chamber with the chassis.

[0005] In one embodiment, the elastic layer includes a plurality of continuously arranged protrusions and depressions, wherein the protrusions protrude in a direction away from the bottom chassis, and the depressions are recessed in a direction approaching the bottom chassis.

[0006] In one embodiment, the lawn mower also includes an inflation assembly, which is arranged on the second side of the chassis away from the blade disc assembly. The inflation assembly includes an air pump and an air duct. The air pump has a first air inlet and an air outlet connected to the atmosphere, and the air outlet is connected to the second air inlet of the air pressure chamber through the air duct.

[0007] In one embodiment, the air guide tube includes a shunt tube and multiple branch tubes, the air inlet of the shunt tube is connected to the air pump, each air outlet of the shunt tube is connected to a branch tube, and the branch tubes pass through different positions of the chassis to communicate with the inflation chamber.

[0008] In one embodiment, the air duct includes a plurality of air outlets, and the plurality of air outlets are respectively connected to different positions of the chassis to be connected to the inflation cavity; and the plurality of air outlets are connected in series in sequence.

[0009] In one embodiment, the lawn mower further includes a detection module and an electronic control module, wherein the detection module is used to detect the rotational speed of the blade disc assembly, and the electronic control module is used to control the inflation assembly to fill or extract gas into or out of the air pressure chamber according to the detection result of the detection module so as to cause the air pressure chamber to deform.

[0010] In one embodiment, when the rotation speed of the blade detected by the detection module drops to a preset threshold value, the inflation component is controlled to inflate the air pressure chamber. After a preset time, the inflation of the inflation component is stopped, and the inflation component is driven to extract the gas in the air pressure chamber to retract the air pressure chamber.

[0011] In one embodiment, when the detection module detects that the rotation speed of the cutter disc returns to normal, the inflation component stops working.

[0012] In one embodiment, the elastic layer and the chassis are bonded together by a thermal bonding process.

[0013] Another aspect of the present application provides a method for removing grass residues with a lawn mower, which is used to operate the above-mentioned lawn mower, and comprises: Detecting the accumulation degree of grass residues on the bottom of the air pressure chamber; When the accumulation degree of the grass residue exceeds a threshold value, filling the air pressure chamber with gas; After the gas filled in the air pressure chamber reaches a preset value, the gas in the air pressure chamber is extracted; After the preset conditions are met, the inflation and deflation of the air pressure chamber are stopped.

[0014] The method for removing grass residues with a lawn mower provided in an embodiment of the present application can sequentially expand and contract the air pressure chamber by filling and extracting gas into the air pressure chamber when it is detected that the accumulation level of grass residues exceeds a threshold value, thereby causing the air pressure chamber to fall off, thereby achieving the effect of cleaning the chassis.

[0015] In one embodiment, the preset conditions include: sensing that the accumulation level of grass residues on the chassis is less than the threshold, the number of times the air is inflated and deflated in the air chamber reaches a preset value, and the time for inflation and deflation in the air chamber reaches a preset value.

[0016] In one embodiment, the step of detecting the accumulation degree of grass residues on the bottom of the air pressure chamber includes: detecting the rotation speed of the blade disc assembly, and when the rotation speed of the blade disc assembly drops to a preset threshold, inflating the air pressure chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the lawn mower in the embodiment of the present application.

[0018] Figure 2 Schematic diagram of the internal structure of the lawn mower in the embodiment of the present application.

[0019] Figure 3 for Figure 2 Schematic diagram of the II-II cross-sectional structure.

[0020] Figure 4 This is a structural schematic diagram of the lawn mower from another perspective in an embodiment of the present application.

[0021] Figure 5 Schematic diagram of a control module of a lawn mower in an embodiment of the present application.

[0022] Figure 6 This is a flow chart of a method for removing grass residues using a lawn mower in an embodiment of the present application.

[0023] Main component symbols Lawn mower: 100 Chassis: 10 Housing: 11 Second air inlet: 111 Air pressure chamber: 12 - Elastic layers: 13 Protrusion: 131 Depression: 133 - Shell: 20 Walking components: 21 Cutter assembly: 30 Motor: 31 Blade disc: 33 Blade: 331 Inflatable components: 50 Air pump: 51 First air inlet: 511 First outlet: 513 Airway: 53 First catheter: 531 Second catheter: 533 First nozzle: 535a Second nozzle: 535b Control modules: 70 Detection modules: 71 Electronic control module: 73 Steps: S1, S2, S3, S4.

[0024] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the present application is described in detail below in conjunction with the accompanying drawings and preferred implementation methods.

[0028] See also Figure 1 The lawn mower 100 provided in the embodiment of the present application includes a chassis 10 and a housing 20 disposed above the chassis 10, and the housing 20 is buckled with the chassis 10 to form a receiving cavity. A plurality of travel components 21 may be disposed on the chassis 10, and the travel components 21 are used to drive the movement of the chassis 10, and the travel components 21 may be driven by a motor, thereby driving the lawn mower 100 to move.

[0029] Please also read Figure 2 , Figure 3 and Figure 4 The lawn mower 100 further includes a pneumatic chamber 12, a blade disc assembly 30, and an inflatable assembly 50. The blade disc assembly 30 and the inflatable assembly 50 are arranged on the chassis 10, and the pneumatic chamber 12 is arranged on a first side close to the chassis 10 and on the same side as the blade disc assembly 30. When gas enters the pneumatic chamber 12, the pneumatic chamber 12 is deformed, so that the deposits attached to the bottom of the pneumatic chamber 12 fall off. The inflatable assembly 50 is arranged on a second side of the chassis 10 away from the blade disc assembly 30.

[0030] Specifically, see Figure 3 The chassis 10 includes a shell 11, and a pneumatic cavity 12 has an elastic layer 13. The elastic layer 13 is disposed on one side of the shell 11. The shell 11 and the elastic layer 13 together form a closed pneumatic cavity 12. The inflatable component 50 is connected to the pneumatic cavity 12 to fill or extract gas into or out of the pneumatic cavity 12, so as to deform the elastic layer 13.

[0031] The shell 11 is a rigid structure, which is used to carry the blade assembly 30 and the inflatable assembly 50. The elastic layer 13 is bonded to the shell 11 by a thermal bonding process. The material of the elastic layer 13 can be one of silicone, thermoplastic polyurethane and ethylene propylene rubber. When the air pressure chamber 12 is filled with gas, the elastic layer 13 expands and deforms in a direction away from the shell 11. When the gas in the air pressure chamber 12 is extracted, the elastic layer 13 deforms in a direction close to the shell 11. During the use of the lawn mower 100, the elastic layer 13 faces the ground, so impurities such as grass clippings cut by the lawn mower 100 will adhere to the elastic layer 13. By inflating or exhausting air in the air pressure chamber 12, the elastic layer 13 can be expanded or contracted, so that the impurities attached to the elastic layer 13 fall off as the elastic layer 13 shrinks, thereby achieving a cleaning effect.

[0032] In this embodiment, please refer to Figure 3 and Figure 4 The elastic layer 13 includes a plurality of continuously arranged protrusions 131 and recesses 133, wherein the protrusions 131 protrude in a direction away from the shell 11, and the recesses 133 are recessed in a direction close to the shell 11, and the plurality of protrusions 131 and the plurality of recesses 133 are arranged crosswise in sequence, thereby forming a wavy structure. When the elastic layer 13 is deformed, the elastic layer 13 as a whole deforms in a direction close to or away from the shell 11, but due to the uneven surface formed by the protrusions 131 and the recesses 133, during the deformation process, different positions on the protrusions 131 and the recesses 133 will deform in different angles, thereby causing the impurities attached to the elastic layer 13 to move away from or squeeze each other, thereby improving the effect of cleaning the impurities. In other embodiments, the elastic layer 13 may also be configured to include a plurality of protrusions 131 and recesses 133 arranged in a grid, or configured to be other structures with uneven surfaces, and the present application does not limit this.

[0033] In this embodiment, a hydrophobic layer or an anti-stick coating (not shown) is further provided on the side of the elastic layer 13 away from the housing 11. Specifically, the elastic layer 13 is usually made of a material with a good friction coefficient and adsorption. By providing a water transfer layer or an anti-stick coating, the amount of impurities attached can be reduced. In other embodiments, the material of the elastic layer 13 can also be directly selected as a material with a low friction coefficient and adsorption, thereby directly reducing the amount of impurities attached. This application does not limit this.

[0034] Please also read Figure 2 and Figure 4In this embodiment, the blade disc assembly 30 includes a motor 31 and a blade disc 33. The motor 31 is disposed on the side of the chassis 10 facing the housing 11, and the blade disc 33 is disposed on the side of the chassis 10 facing the elastic layer 13. The output shaft of the motor 31 is connected to the blade disc 33, thereby driving the blade disc 33 to rotate. Specifically, there are two blade discs 33, and each blade disc 33 is provided with a plurality of blades 331. When the motor 31 drives the blade disc 33 to rotate, the blades 331 rotate with the blade disc 33, thereby performing a mowing operation. In other embodiments, the number of blade discs 33 may also be one or more, and this application does not limit this.

[0035] When there are two blade discs 33, the blade discs 33 are arranged side by side in the wide band direction of the bottom of the lawn mower 100 to improve the mowing efficiency; when there are three blade discs 33, they are evenly distributed at the bottom of the lawn mower 100 to improve the mowing efficiency and cut the grass residue finer.

[0036] Please also read Figure 2 and Figure 3The inflatable component 50 includes an air pump 51 and an air guide tube 53, the air pump 51 is connected to the air guide tube 53, and the air guide tube 53 is connected to the air pressure chamber 12. Specifically, in the present embodiment, the air pump 51 has a first air inlet 511 connected to the atmosphere and a first air outlet 513 connected to the air guide tube 53, and the first air outlet 513 is connected to the second air inlet 111 of the air pressure chamber 12 through the air guide tube 53. The air guide tube 53 includes a first conduit 531, a second conduit 533, and a first nozzle 535a and a second nozzle 535b, and the first nozzle 535a and the second nozzle 535b are respectively connected to different positions on the housing 11 to communicate with the second air inlet 111 at different positions of the air pressure chamber 12, so as to inflate or exhaust air into the air pressure chamber 12 from different positions, so as to uniformly deform the elastic layer 13. The first conduit 531 is arranged between the first air outlet 513 of the air pump 51 and the first nozzle 535a, one end of the second conduit 533 is connected to the first nozzle 535a, and the other end of the second conduit 533 is connected to the second nozzle 535b. The gas pumped out from the air pump 51 first passes through the first conduit 531 to reach the first nozzle 535a, a part of the gas is filled into the air pressure chamber 12 through the first nozzle 535a, and the other part of the gas flows from the first nozzle 535a into the second conduit 533, and reaches the second nozzle 535b through the second conduit 533, and is filled into the air pressure chamber 12. Two second air inlets 111 are provided on the shell 11, and the two second air inlets 111 are respectively provided corresponding to the first nozzle 535a and the second nozzle 535b. In other embodiments, only one nozzle or more nozzles may be provided, and a corresponding number of second air inlets 111 are provided on the shell 11, and each second air inlet 111 corresponds to a nozzle. The air guide tube 53 may also include a plurality of conduits correspondingly connected to the first nozzle 535a and the second nozzle 535b, so as to inflate or inhale air into the air pressure chamber 12 through each second air inlet 111, thereby causing the air pressure chamber 12 to expand or contract uniformly, which is not limited in the present application.

[0037] In another embodiment, the air guide tube 53 includes a shunt tube and multiple branch tubes (not shown in the figure), the air inlet of the shunt tube is connected to the first air outlet 513 of the air pump 51, each air outlet of the shunt tube is respectively connected to a branch tube, and each branch tube is connected to at least one nozzle, that is, multiple nozzles can be arranged in parallel, and the multiple branch tubes are respectively connected to different positions of the shell 11 through corresponding nozzles to connect with the second air inlet 111 opened at different positions of the air pressure chamber 12, so as to inflate or inhale air into the air pressure chamber 12 from different positions, thereby effectively improving the cleaning effect of impurities.

[0038] See also Figure 5The lawn mower 100 also includes a control module 70, which includes a detection module 71 and an electronic control module 73. The detection module 71 is used to detect the accumulation degree of grass residues on the chassis 10. The electronic control module 73 is electrically connected to the detection module 71, and is used to control the inflation component 50 to fill or extract gas into the air pressure chamber 12 according to the sensing result of the detection module 71, so that the elastic layer 13 is deformed to clean the grass residues attached to the chassis 10.

[0039] Specifically, the detection module 71 may be a speed measuring component provided on the blade disc 33, and the detection module 71 is used to detect the speed of the blade disc 33, so as to determine whether the blade disc 33 is affected by grass residues and causes the speed to decrease. When the speed of the blade disc 33 detected by the detection module 71 drops to a preset threshold, the electric control module 73 controls the inflation component 50 to inflate the air pressure chamber 12, and after a preset time, stops inflating the inflation component 50, and drives the inflation component 50 to extract the gas in the air pressure chamber 12, so that the air pressure chamber 12 retracts.

[0040] In other embodiments, the detection module 71 may also be an optical sensor, and the detection module 71 determines the degree of accumulation of impurities on the chassis 10 by acquiring optical information on the chassis 10. For example, the detection module 71 may be an infrared sensor, which emits infrared light to the chassis 10 and receives the reflected infrared light, thereby determining the degree of accumulation of grass residues on the chassis 10 according to the received optical information. The detection module 71 may also be other sensors that can sense the degree of accumulation of impurities on the chassis 10. For example, the detection module 71 may include a plurality of ultrasonic radars, which are arranged around the blade assembly 30 and detect the number of ultrasonic radars covered by grass residues, thereby determining the degree of accumulation of grass residues on the chassis 10. This application does not limit this.

[0041] The electric control module 73 is electrically connected to the air pump 51, and is used to control the switch of the air pump 51, and control the air pump 51 to inflate or evacuate air into the air pressure chamber 12. The electric control module 73 can be provided with a preset value, which can be a preset duration, or a preset number of times of inflation and deflation. After the electric control module 73 receives a sensing signal and starts the air pump 51, the air pump 51 is controlled to be turned off when the preset value is reached, thereby ending the cleaning process. Among them, the preset value is a pre-entered value that can fully inflate and deflate the air pressure chamber 12 to clean the grass residue attached to the chassis 10. Specifically, the time required for inflation and deflation to clean the grass residue attached to the chassis 10 can be counted multiple times, thereby calculating the preset duration, or the number of inflation and deflation required to clean the grass residue attached to the chassis 10 can be counted multiple times, thereby obtaining the preset number of inflation and deflation. The preset value can also be manually input according to the needs of the user. This application does not limit this.

[0042] In other embodiments, the electronic control module 73 may also be configured to continuously receive the sensing signal, and after the detection module 71 detects that the impurity accumulation level on the chassis 10 is less than a preset threshold, the electronic control module 73 controls the air pump 51 to shut down to stop the cleaning process. This application does not limit this.

[0043] The lawn mower 100 provided in the embodiment of the present application is provided with a chassis 10 including an elastic layer 13, and the elastic layer 13 and the housing 11 are provided to form a sealed air pressure chamber 12. By providing an inflatable component 50 to inflate and deflate the air pressure chamber 12, the elastic layer 13 can be deformed, so that impurities attached to the elastic layer 13 generated during the operation of the lawn mower 100 fall off, thereby achieving the effect of cleaning the chassis 10, which is beneficial to avoid excessive accumulation of impurities affecting the rotation of the blade 33, and is beneficial to ensuring the working efficiency of the lawn mower 100. In addition, the structure of the air pressure chamber 12 can also isolate the inflatable component 50 from the outside, avoiding the risk of impurities being sucked into the air pump 51, which is beneficial to improving the service life of the lawn mower 100.

[0044] See also Figure 6 The present application also provides a method for controlling a lawn mower 100, which is used to control the lawn mower 100 in the above embodiment. The method comprises: Step S1: obtaining the accumulation degree of grass residues on the bottom of the air pressure chamber; In step S1, obtaining the accumulation degree of impurities on the chassis includes sensing the rotation speed of the cutter disc 33. Specifically, during the operation of the lawn mower 100, the impurities generated are accumulated on the chassis 10. If the accumulated amount is too much, it will cover the position where the cutter disc 33 is located, thereby reducing the rotation speed of the cutter disc 33. At this time, the reduction in the rotation speed of the cutter disc 33 can be set to a threshold (for example, a 10% reduction). When the reduction in the rotation speed of the cutter disc 33 reaches the threshold, it is determined that the accumulation of impurities on the chassis 10 is too much.

[0045] Detecting the accumulation degree of impurities on the chassis may also include obtaining optical information on the chassis 10. For example, the detection module 71 may be an infrared sensor that emits infrared light to the chassis 10 and receives the intensity of the reflected infrared light, thereby determining the accumulation degree of grass residues on the chassis 10 based on the received optical information.

[0046] The degree of accumulation of impurities on the chassis can also be manually confirmed by the user. The present application does not limit the specific method for obtaining the degree of accumulation of impurities on the chassis.

[0047] Step S2: When the accumulation degree of the grass residue exceeds a threshold value, filling the air pressure chamber with gas; Specifically, if the degree of impurity accumulation on the chassis is sensed by sensing the rotation speed of the cutter disc 33, it is determined whether the rotation speed of the cutter disc is reduced to a preset threshold value. If it is reduced to the preset threshold value, the air pump is controlled to inflate. If the degree of impurity accumulation on the chassis is detected, it can also include obtaining optical information on the chassis 10. For example, when the chassis coverage area is detected by emitting infrared light, the degree of impurity accumulation on the chassis is determined by detecting the attenuation degree of the infrared light signal intensity. When the infrared light signal intensity decays to the threshold value, the air pump is started to inject gas into the air pressure chamber.

[0048] Step S3: After the gas filled into the air pressure chamber reaches a preset value, the filling and deflation of the air pressure chamber is stopped.

[0049] When it is detected that the accumulation of impurities exceeds the threshold, the control module starts the air pump to fill the air pressure chamber with gas, thereby increasing the internal pressure of the air pressure chamber and causing the elastic device to deform. When the gas pressure in the air pressure chamber reaches a preset value, the control module starts the exhaust device to extract the gas in the air pressure chamber, causing the elastic layer to shrink. The grass residue attached to the bottom of the elastic layer can be removed through the expansion and contraction of the elastic layer. At the same time, in this way, the method of setting the detection gas pressure to reach the preset value can prevent the elastic layer from being damaged by the blade due to excessive deformation.

[0050] In addition, step S3 also includes: after the gas filled in the air pressure chamber reaches a preset value, the gas in the air pressure chamber is extracted, and the air pressure chamber is repeatedly filled and deflated; after the preset conditions are met, the filling and deflation of the air pressure chamber is stopped.

[0051] The preset condition may include any of the following conditions: sensing that the accumulation of grass residues on the chassis 10 is less than a threshold; the number of times the air pressure chamber 12 is inflated and deflated reaches a preset value; the time of inflating and deflation in the air pressure chamber 12 reaches a preset value. The preset condition is a condition for ending the cleaning process of the chassis 10. Different preset conditions can be selected according to actual needs, and this application does not limit this.

[0052] The lawn mower control method provided in the embodiment of the present application can start the inflation component 50 after sensing that a large amount of impurities are accumulated on the chassis 10, thereby controlling the expansion and contraction of the elastic layer 13 to make the impurities attached to the chassis 10 fall off, thereby achieving the effect of cleaning the chassis 10, which is beneficial to avoid excessive accumulation of impurities that affect the rotation of the cutter disc, and is beneficial to ensuring the working efficiency of the lawn mower 100.

[0053] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A lawn mower, characterized in that: include: Chassis; An air pressure chamber, the air pressure chamber being arranged near a first side of the chassis facing the ground; A cutter disc assembly, the cutter disc assembly being disposed on a first side of the chassis and close to the air pressure chamber; When the gas enters the air pressure chamber, the air pressure chamber is deformed, causing the deposits attached to the bottom of the air pressure chamber to fall off.

2. The lawn mower according to claim 1, characterized in that The air pressure cavity has an elastic layer, which is disposed on a first side of the chassis and forms a sealed air pressure cavity with the chassis.

3. The lawn mower according to claim 2, characterized in that The elastic layer includes a plurality of continuously arranged protrusions and depressions, wherein the protrusions protrude in a direction away from the bottom plate, and the depressions are recessed in a direction approaching the bottom plate.

4. The lawn mower according to claim 1, characterized in that It also includes an inflation component, which is arranged on the second side of the chassis away from the blade disc assembly. The inflation component includes an air pump and an air duct. The air pump has a first air inlet and a first air outlet connected to the atmosphere. The air duct includes at least one nozzle, one end of the air duct is connected to the first air outlet, and the other end of the air duct is connected to the second air inlet of the air pressure chamber through the nozzle.

5. The lawn mower according to claim 4, characterized in that The air guide pipe includes a shunt pipe and multiple branch pipes, the air inlet of the shunt pipe is connected to the first air outlet of the air pump, each air outlet of the shunt pipe is connected to a branch pipe, and each branch pipe is connected to the second air inlet at different positions on the chassis through a nozzle.

6. The lawn mower according to claim 4, characterized in that The air duct includes a first nozzle and a second nozzle, and the first nozzle and the second nozzle are respectively connected to the second air inlet at different positions of the air pressure chamber; the air duct also includes a first conduit and a second conduit, the first conduit is connected to the first air outlet and the first nozzle, one end of the second conduit is connected to the first nozzle, and the other end of the second conduit is connected to the second nozzle.

7. The lawn mower according to any one of claims 4 to 6, characterized in that: The lawn mower also includes a detection module and an electronic control module. The detection module is used to detect the rotation speed of the blade disc assembly, and the electronic control module is used to control the inflation assembly to fill or extract gas into or out of the air pressure chamber according to the detection result of the detection module to cause the air pressure chamber to deform.

8. The lawn mower according to claim 7, characterized in that When the rotation speed of the cutter disc detected by the detection module drops to a preset threshold, the inflation component is controlled to inflate the air pressure chamber. After a preset time, the inflation of the inflation component is stopped, and the inflation component is driven to extract the gas in the air pressure chamber to retract the air pressure chamber.

9. The lawn mower according to claim 7, characterized in that When the detection module detects that the rotation speed of the cutter disc returns to normal, the inflation component stops working.

10. The lawn mower according to claim 2, characterized in that The elastic layer and the chassis are bonded to each other through a thermal bonding process.

11. A method for removing grass residues with a lawn mower, used for the lawn mower according to any one of claims 1 to 10, characterized in that: include: Obtaining the accumulation degree of grass residues on the bottom of the air pressure chamber; When the accumulation degree of the grass residue exceeds a threshold value, filling the air pressure chamber with gas; After the gas filled in the air pressure chamber reaches a preset value, the filling and releasing of the air pressure chamber is stopped.

12. The method for removing grass residues using a lawn mower according to claim 11, characterized in that: After the gas filled in the air pressure chamber reaches a preset value, the method further includes: extracting the gas in the air pressure chamber and repeatedly filling and deflating the air pressure chamber; and stopping filling and deflating the air pressure chamber after a preset condition is met.

13. The method for removing grass residues using a lawn mower according to claim 12, characterized in that: The preset condition includes satisfying any one of the following situations: sensing that the accumulation degree of grass residues on the chassis is less than the threshold value; the number of times of inflation and deflation in the inflation chamber reaches a preset value; the time of inflation and deflation in the inflation chamber reaches a preset value.

14. The method for removing grass residues using a lawn mower according to claim 11, characterized in that: The step of obtaining the accumulation degree of grass residues on the bottom of the air pressure chamber includes: detecting the rotation speed of the blade disc assembly, and when the rotation speed of the blade disc assembly drops to a preset threshold, inflating the air pressure chamber.

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