Lawn mower

Abstract

The application discloses a mower, comprising: a mowing element comprising a first blade and a second blade; a containing cavity is formed in the chassis, the containing cavity comprises a first cutter disc and a second cutter disc, the first blade is arranged in the first cutter disc, and the second blade is arranged in the second cutter disc; the driving assembly comprises a first motor and a second motor; the first motor controls the first blade, and the second motor controls the second blade. The mower further comprises a side discharging assembly, and the side discharging assembly is connected with the second cutter head. A communication area is arranged between the first cutter head and the second cutter head; the rotation direction of the first motor is opposite to that of the second motor; the first motor controls the first blade to drive grass clippings in the first cutter head into the second cutter head through the communication area; the second motor controls the second blade to drive grass clippings in the second cutter head into the side discharging assembly. By the adoption of the technical scheme, the mower can conduct side discharging when the blades of the double cutterheads rotate oppositely.

Description

Technical Field

[0001] The present application relates to an electric machine, and in particular to a lawn mower. Background Art

[0002] A lawn mower, also known as a weed cutter, lawn mower, or lawn trimmer, is a mechanical tool used to trim lawns and vegetation. It consists of a chassis, engine, running mechanism, cutting element, and operating mechanism. The engine is mounted on the chassis, and the cutting element is attached to the engine's output shaft. The cutting element utilizes the engine's high-speed rotation to significantly increase its speed, saving workers time and manpower.

[0003] Lawn mowers are categorized as single-disc and dual-disc models. Dual-disc models offer blades with either the same rotation or opposite rotation. The blades with the same rotation can be arranged horizontally or tilted. Horizontal blades require a synchronous belt drive, resulting in lower efficiency. Tilt blades increase overall machine size and reduce grass collection performance. Opposite-rotation blades lack side discharge.

[0004] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0005] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, an object of the present application is to provide a lawn mower that can perform side discharge when the blades of the dual cutter discs rotate in opposite directions.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] A lawn mower comprises: a mowing element, comprising a first blade and a second blade for performing a cutting function; a chassis, formed with a accommodating cavity for accommodating at least part of the mowing element, wherein a first cutter disc and a second cutter disc are arranged in the accommodating cavity; wherein the first blade is arranged in the first cutter disc, and the second blade is arranged in the second cutter disc; a driving assembly, comprising a first motor and a second motor for driving the mowing element to rotate; wherein the first motor controls the first blade, and the second motor controls the second blade; the lawn mower further comprises a side discharge assembly that performs a grass discharge function, and the side discharge assembly is connected to the second cutter disc; there is a connecting area between the first cutter disc and the second cutter disc; the rotation direction of the first motor is opposite to the rotation direction of the second motor; the first motor controls the first blade to drive grass clippings in the first cutter disc into the second cutter disc through the connecting area; the second motor controls the second blade to drive grass clippings in the second cutter disc into the side discharge assembly.

[0008] In some embodiments, the lawn mower further includes a side row cover disposed between the second cutting deck and the side row assembly.

[0009] In some embodiments, before the side row assembly performs the grass discharge function, the side row cover is in an open state, so that the second blade disc is connected to the side row assembly.

[0010] In some embodiments, an angle between a line connecting the centers of the first and second cutter discs and a plane extending in the left-right direction of the lawn mower is greater than or equal to 5 degrees and less than or equal to 60 degrees.

[0011] In some embodiments, the distance between the first blade and the second blade is greater than or equal to 3 mm and less than or equal to 10 mm.

[0012] In some embodiments, a projected length of a cutting overlap dimension of the first blade and the second blade on a plane extending in the left-right direction of the lawn mower is greater than or equal to 5 mm.

[0013] In some embodiments, the center lines of the first and second blade discs coincide with the center line of the lawn mower; wherein the center line of the lawn mower is a straight line along the front-to-back direction of the lawn mower, and the center line of the blade disc is a straight line along the front-to-back direction of the lawn mower and is equidistant from the center of the first blade disc and the center of the second blade disc.

[0014] In some embodiments, the channel width of the communication area is greater than or equal to 80 mm.

[0015] In some embodiments, the lawn mower further includes a grass discharge channel, and the grass discharge channel includes a rear grass discharge port arranged at the rear end of the lawn mower; wherein the grass discharge channel is connected to the second cutter disc.

[0016] In some embodiments, the grass discharge channel includes a first end connected to the second blade disc and a second end connected to the rear grass discharge port, and in the up and down direction, the second end is higher than the first end.

[0017] In some embodiments, an angle formed between a line connecting the first end and the second end and a plane extending along the front-rear direction of the lawn mower is greater than or equal to 20 degrees and less than or equal to 50 degrees.

[0018] In some embodiments, the length of the grass discharge channel is greater than or equal to 200 mm and less than or equal to 500 mm.

[0019] In some embodiments, the lawn mower further includes a rear row blocking plate, which is disposed at a first end of the grass discharge channel connected to the second cutter disc.

[0020] In some embodiments, before the grass discharge channel performs the grass discharge function, the rear discharge blocking plate is in an open state, so that the grass discharge channel is connected.

[0021] In some embodiments, the lawn mower includes a side cover and a rear baffle; when the side cover and the rear baffle are both in a closed state, the first motor controls the first blade to drive the grass clippings in the first blade disc into the second blade disc through the connecting area, and the second motor controls the second blade to drive the grass clippings in the second blade disc into the connecting area, so that the lawn mower performs the grass chopping function.

[0022] The benefit of the present application lies in that: by setting a connecting area between the first blade disc and the second blade disc, when the first blade and the second blade rotate in opposite directions, the first blade is controlled to drive the grass clippings in the first blade disc into the second blade disc through the connecting area, and then the second blade disc is controlled to drive the grass clippings in the second blade disc into the side discharge assembly, so that side discharge can be performed when the blades of the double blade disc rotate in opposite directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a perspective view of a lawn mower according to an embodiment;

[0024] Figure 2 yes Figure 1 Chassis diagram of the lawn mower in;

[0025] Figure 3 yes Figure 1 The mower in the diagram includes a chassis diagram of the side discharge assembly;

[0026] Figure 4 yes Figure 1 A top view of the lawn mower including a side discharge assembly;

[0027] Figure 5 yes Figure 1 The cutter disc of the lawn mower in the figure;

[0028] Figure 6 yes Figure 1 The mower includes a chassis diagram of the grass discharge channel;

[0029] Figure 7 yes Figure 1 The lawn mower includes a perspective view of a grass discharge channel;

[0030] Figure 8 yes Figure 1 A side cross-sectional view of a grass discharge channel of a lawn mower;

[0031] Figure 9 yes Figure 1 A perspective view of the lawn mower including a rear blocking plate;

[0032] Figure 10 yes Figure 1 A perspective view of the lawn mower including the grass basket and rear cover;

[0033] Figure 11 yes Figure 1The lawn mower includes a three-dimensional diagram of a battery pack, a battery pack compartment, and a battery pack rack;

[0034] Figure 12 yes Figure 11 The lawn mower in the figure does not include a perspective view of the battery pack, battery pack compartment, and battery pack rack;

[0035] Figure 13 yes Figure 1 A perspective view of a support portion of a lawn mower;

[0036] Figure 14 yes Figure 1 The lawn mower includes a side view of the support portion;

[0037] Figure 15 yes Figure 1 Rear view of the mower including the battery compartment;

[0038] Figure 16 yes Figure 1 The lawn mower includes a top view of a drive assembly and a drive assembly cover;

[0039] Figure 17 yes Figure 1 The lawn mower includes a side view of a battery pack and a battery pack compartment;

[0040] Figure 18 yes Figure 1 A top view of the lawn mower including a reinforcement;

[0041] Figure 19 yes Figure 1 The lawn mower in the includes a front view of the accommodation space;

[0042] Figure 20 yes Figure 1 The lawn mower in the embodiment includes a side view of the receiving space;

[0043] Figure 21 yes Figure 1 The lawn mower includes a top view of the heat dissipation channel;

[0044] Figure 22 yes Figure 1 A perspective view of the lawn mower including a heat dissipation airflow inlet;

[0045] Figure 23 yes Figure 1 A perspective view of a cover plate of a lawn mower;

[0046] Figure 24 yes Figure 1 A side view of a heat dissipation channel of a lawn mower;

[0047] Figure 25 is a rear view of a lawn mower including a handle height adjustment mechanism according to one embodiment;

[0048] Figure 26 is a perspective view of a lawn mower including a height adjustment mechanism according to one embodiment;

[0049] Figure 27 is a side view of a hub motor wiring harness for a lawn mower according to one embodiment;

[0050] Figure 28 is a rear view of a lawn mower including a hub motor wiring harness according to one embodiment. DETAILED DESCRIPTION

[0051] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0052] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0053] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0054] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0055] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0056] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0057] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0058] Figure 1 The illustrated lawn mower 100 is used by a user to cut grass in a lawn, such as a garden or golf course. Lawns require regular care, and therefore require frequent use of the lawn mower 100. In this embodiment, the lawn mower 100 is a walk-behind type machine. When operating the lawn mower 100, the user stands behind the lawn mower 100 and pushes it along the ground.

[0059] like Figure 1 As shown, the lawn mower 100 includes a handle assembly 11 and a main unit 12. The handle assembly 11 is used for the user to hold and operate the lawn mower 100. The main unit 12 includes a housing assembly 121 and a chassis 122. The handle assembly 11 and the housing assembly 121 are rotatably connected. Figure 1 Shown: front, back, left, right, upper, and lower sides.

[0060] like Figure 2 As shown, the lawn mower 100 also includes a mowing element 13 and a drive assembly 14. The mowing element 13 is used to perform a cutting function and includes a first blade 131 and a second blade 132. The drive assembly 14 is used to rotate the mowing element 13 and includes a first motor 141 and a second motor 142. The first motor 141 controls the rotation of the first blade 131, while the second motor 142 controls the rotation of the second blade 132. The chassis 122 defines a receiving chamber 15 for accommodating at least a portion of the mowing element 13. A first cutting disc 151 and a second cutting disc 152 are disposed within the receiving chamber 15. The first blade 131 is disposed in the first cutting disc 151, while the second blade 132 is disposed in the second cutting disc 152. Optionally, the first blade 131 and the second blade 132 may have a size of 390 mm. Alternatively, the first blade 131 and the second blade 132 may have a size of 376 mm. Alternatively, the first blade 131 and the second blade 132 may have other sizes. Alternatively, the sizes of the first blade 131 and the second blade 132 may be different, which is not limited in this application. Alternatively, the cutting size of the lawn mower 100 may be 760 mm. Alternatively, the cutting size of the lawn mower 100 may be 748 mm. In addition, the cutting size of the lawn mower 100 may also be other sizes, which is not limited in this application. The cutting size of the lawn mower 100 refers to the cutting width of the lawn mower 100, that is, the width of the grass cut by the lawn mower 100 when in operation.

[0061] In some embodiments, the first motor 141 rotates in an opposite direction to the second motor 142, thereby driving the first blade 131 to rotate in an opposite direction to the second blade 132. When the first motor 141 rotates clockwise, the second motor 142 rotates counterclockwise. Alternatively, when the first motor 141 rotates counterclockwise, the second motor 142 rotates clockwise. This application assumes that the first motor 141 rotates clockwise and the second motor 142 rotates counterclockwise.

[0062] like Figure 3 As shown, a connecting area 153 is provided between the first blade disc 151 and the second blade disc 152, so that the first motor 141 can control the first blade 131 to drive the grass clippings in the first blade disc 151 into the second blade disc 152 through the connecting area 153. Figure 3As shown, the lawn mower 100 further includes a side discharge assembly 16, which is connected to the second blade 152 to perform a grass discharge function. The second motor 142 can control the second blade 132 to drive the grass clippings in the second blade 152 into the side discharge assembly 16, thereby performing grass discharge. Figure 4 As shown, the lawn mower 100 further includes a side discharge cover 161, which is disposed between the second cutting deck 152 and the side discharge assembly 16. Before the lawn mower 100 uses the side discharge assembly 16 to perform a grass discharge function, the side discharge cover 161 needs to be opened to connect the second cutting deck 152 with the side discharge assembly 16. Alternatively, opening the side discharge cover 161 can be performed by removing the side discharge cover 161 from the second cutting deck 152 and then installing the side discharge assembly 16 onto the second cutting deck 152. Alternatively, opening the side discharge cover 161 can be performed by lifting the side discharge cover 161 upward to directly install the side discharge assembly 16 onto the second cutting deck 152, with the side discharge cover 161 abutting against the top of the side discharge assembly 16.

[0063] Furthermore, by opening the side discharge cover 161, a gap appears in the second blade disc 152, making the air pressure in the second blade disc 152 lower than that in the first blade disc 151, making it easier for grass clippings to enter the second blade disc 152 from the first blade disc 151. By controlling the first blade 131 to drive grass clippings from the first blade disc 151 into the second blade disc 152, and then controlling the second blade 132 to drive grass clippings from the second blade disc 152 into the side discharge assembly 16, the side discharge function of a dual-disc lawn mower with counter-rotating blades is achieved. The side discharge cover 161 can be installed on the lawn mower 100 using an elastic component, or other methods, which are not limited in this application.

[0064] Optionally, the channel width W1 of the communication area 153 is greater than or equal to 80 mm. Optionally, the channel width W1 may be 100 mm. Optionally, the channel width W1 may be 120 mm. Optionally, the channel width W1 may be 190 mm. Optionally, the channel width W1 may be 197.5 mm. Figure 5As shown, the upper connecting portion of the communication area 153 (the front connecting portion relative to the lawn mower 100) forms an angle A with a plane along the left-right direction of the lawn mower 100. Angle A is greater than or equal to 10 degrees and less than or equal to 45 degrees. For example, angle A can be 12.5 degrees. The extension of one side of angle A passes through the first motor 141. The lower connecting portion of the communication area 153 (the rear connecting portion relative to the lawn mower 100) forms an angle B with a plane along the left-right direction of the lawn mower 100. Angle B is greater than or equal to 15 degrees and less than or equal to 45 degrees, and the extension passes through the left motor. For example, angle B can be 30 degrees. The extension of one side of angle B passes through the second motor 142. By adjusting the channel width of the communication area 100 and the angles of the upper and lower connecting portions of the communication area 100, it is easier for the first blade 131 to move grass clippings from the first cutter disc 151 into the second cutter disc 152.

[0065] like Figure 5 As shown, the line connecting the center of the first blade disc 151 and the center of the second blade disc 152 forms an angle C with the plane extending along the left and right directions of the lawn mower 100, and the angle C is greater than or equal to 5 degrees and less than or equal to 60 degrees. Optionally, the angle C can be 20 degrees. Optionally, the angle C can be 30 degrees. Optionally, the angle C can be 50 degrees. That is, the first blade disc 151 and the second blade disc 152 are arranged on the chassis 122 at an angle, rather than being arranged on the chassis 122 horizontally. As shown in FIG. Figure 3 As shown, the first blade 131 and the second blade 132 have a projected cutting overlap on a plane extending in the left-right direction of the lawn mower 100, with a projected length L1 greater than or equal to 5 mm. Alternatively, the projected length L1 can be 8 mm. Alternatively, the projected length L1 can be 12 mm. Alternatively, the projected length L1 can be 18.4 mm. This creates a large overlapping cutting area between the two blades, eliminating gaps between the two blade discs when the lawn mower 100 is in operation, thus preventing missed cuts. Alternatively, the distance between the first blade 131 and the second blade 132 is greater than or equal to 3 mm and less than or equal to 10 mm. Specifically, the distance between the cutting tips of the first blade 131 and the second blade 132 is greater than or equal to 3 mm and less than or equal to 10 mm. This prevents the first blade 131 and the second blade 132 from colliding when cutting simultaneously. Alternatively, the distance between the first blade 131 and the second blade 132 can be 5.5 mm. Optionally, the distance between the first blade 131 and the second blade 132 may be 8 mm.

[0066] A cutter disc centerline 154 is defined between the first cutter disc 151 and the second cutter disc 152. The cutter disc centerline 154 extends along the front-to-back direction of the lawn mower 100, and the distance D1 between the cutter disc centerline 154 and the center of the first cutter disc 151 and the distance D2 between the cutter disc centerline 154 and the center of the second cutter disc 152 are equal. The lawn mower 100 also has a centerline, which extends along the front-to-back direction of the lawn mower 100 and divides the lawn mower 100 into two parts along the front-to-back direction. Figure 4 As shown, in this embodiment, the center line of the lawn mower 100 coincides with the center line 154 of the cutter disc, so that the width of the lawn mower 100 in the left and right directions of the lawn mower 100 is narrower and the volume of the lawn mower 100 is smaller.

[0067] In some embodiments, as Figure 6 and Figure 7 As shown, the lawn mower 100 also includes a grass discharge channel 17, one end of which is connected to the second blade 152, and the other end of the grass discharge channel 17 includes a rear grass discharge port 171 provided at the rear end of the lawn mower 100. The first motor 141 controls the first blade 131 to drive the grass clippings in the first blade 151 into the second blade 152 through the connecting area 153, and the second motor 142 controls the second blade 132 to drive the grass clippings in the second blade 152 into the grass discharge channel 17. The grass discharge channel 17 is used to guide the grass clippings from the second blade 152 to the rear grass discharge port 171. The grass discharge channel 17 includes a first end 172 connected to the second blade 152, and a second end 173 connected to the rear grass discharge port 171. In the up and down direction, the second end 173 is higher than the first end 172. As shown Figure 8 As shown, the line connecting the first end 172 and the second end 173 forms an angle D with a plane extending in the front-to-rear direction of the lawn mower 100. Angle D is greater than or equal to 20 degrees and less than or equal to 50 degrees. Alternatively, angle D can be 30 degrees. Alternatively, angle D can be 40 degrees. Thus, when the lawn mower 100 discharges grass backward, it discharges grass upward.

[0068] In some embodiments, the length of the grass discharge channel 17 is greater than or equal to 200 mm and less than or equal to 500 mm. For example, the length of the grass discharge channel 17 can be 370 mm. The width W2 of the first end 172 of the grass discharge channel 17 connected to the second blade disc 152 is greater than or equal to 100 mm. For example, the width W2 can be 132 mm. The rear grass discharge port 171 can be rectangular, wherein the length of the rear grass discharge port 171 is greater than or equal to 100 mm and the width is greater than or equal to 80 mm. For example, the length of the rear grass discharge port 171 can be 212 mm and the width of the rear grass discharge port 171 can be 151 mm. By setting a longer grass discharge channel 17, a larger width of the grass discharge channel 17 grass inlet (i.e., the first end 172 connected to the second blade disc 152), and a larger length and width of the grass discharge channel 17 grass outlet (i.e., the rear grass discharge port 171), the grass discharge channel 17 is not easily blocked during grass discharge and is conducive to the discharge of grass.

[0069] like Figure 9 As shown, the lawn mower 100 also includes a rear discharge blocking plate 174, which is disposed in the first end 172 connecting the grass discharge channel 17 and the second blade disc 152. Before the lawn mower 100 performs the rear grass discharge function through the grass discharge channel 17, the rear discharge blocking plate 174 needs to be opened first to connect the grass discharge channel 17. In addition, by opening the rear discharge blocking plate 174, a gap appears in the second blade disc 152, so that the air pressure in the second blade disc 152 is lower than that in the first blade disc 151, making it easier for grass clippings to enter the second blade disc 152 from the first blade disc 151. Optionally, before the lawn mower 100 performs the rear grass discharge function through the grass discharge channel 17, the side discharge cover 161 needs to be covered (i.e., the side discharge cover 161 is closed) to prevent grass from being discharged from the side discharge assembly 16. Optionally, before the lawn mower 100 performs rear discharge through the grass discharge channel 17, the side discharge cover 161 and the rear discharge blocking plate 174 can be opened simultaneously, allowing the lawn mower 100 to perform both side and rear discharge functions. Furthermore, when the lawn mower 100 performs side discharge, the rear discharge blocking plate 174 must also be closed to enable side discharge. The rear discharge blocking plate 174 can be installed on the lawn mower 100 using an elastic component, or other methods, which are not limited in this application.

[0070] In some embodiments, as Figure 10As shown, the lawn mower 100 also includes a grass collecting basket 181, which is connected to the main unit 12. When the lawn mower 100 performs the rear discharge function, grass clippings coming out of the grass discharge channel 17 can be projected into the grass collecting basket 181. By setting the angles of the grass discharge channel 17 in the up and down directions, grass clippings can be projected higher into the grass collecting basket 181, making it easier for the grass collecting basket 181 to be filled with grass, thereby improving the grass collecting rate and weight of the grass collecting basket 181. This avoids the problem of grass clippings entering the grass collecting basket 181 at a low angle, causing the interface connecting the grass collecting basket 181 to the main unit 12 to be clogged with a large amount of grass clippings. Figure 10 As shown, the lawn mower 100 further includes a rear cover 182, which is connected to the main body 12 via a housing shaft. The rear cover 182 can be supported above the grass collection basket 181 to prevent some grass clippings from leaking out of the grass collection basket 181 when the lawn mower 100 is in the rear row.

[0071] In some embodiments, when the side cover 161 and the rear blocking plate 174 are both in the closed position on the lawn mower 100, the first motor 141 can control the first blade 131 to drive grass clippings from the first cutter disc 151 into the second cutter disc 152 through the connecting area 153. The second motor 142 can control the second blade 132 to drive grass clippings from the second cutter disc 152 back into the connecting area 153, where the grass clippings fall out of the connecting area 153. Repeating this cutting process enables the lawn mower 100 to perform a grass chopping function. By providing the connecting area 153, the side cover 161, and the rear blocking plate 174, the lawn mower 100 of the present application simultaneously has side discharge function, rear discharge function, and grass chopping function.

[0072] In some embodiments, a fixed phase is provided for each of the first blade 131 and the second blade 132 so that the first blade 131 and the second blade 132 do not collide with each other during rotation. The fixed phase is determined based on an empirical value. In some embodiments, the first motor 141 and the second motor 142 can be driven by a belt so that the first motor 141 and the second motor 142 have a fixed relative position. Furthermore, when the first motor 141 is unpowered, the second motor 142 can drive the first motor 141 to rotate. Alternatively, when the second motor 142 is unpowered, the first motor 141 can drive the second motor 142 to rotate.

[0073] like Figure 11 and Figure 12 As shown, the lawn mower 100 further includes a battery pack 20, a battery pack compartment 21, and a battery pack rack 22. The battery pack 20 is used to power the drive assembly 14, and the battery pack compartment 21 is used to accommodate the battery pack 20. The battery pack rack 22 is used to fix and support the battery pack compartment 21 so that at least a portion of the battery pack compartment 21 can be disposed above the housing assembly 121. Figure 11As shown, the lawn mower 100 further includes a running wheel set 30, and the running wheel set 30 includes a front running wheel set 31 and a rear running wheel set 32. In some embodiments, the battery pack frame 22 includes a support portion 221, a first force transmission portion 222, and a second force transmission portion 223. The support portion 221 is used to support the battery pack compartment 21. Figure 12 and Figure 13 As shown, support portions 221 are provided on the left and right sides of the battery pack compartment 21 to support the battery pack compartment 21 above the housing assembly 121. Optionally, to prevent the battery pack compartment 21 from moving forward and backward on the battery pack frame 22, a limiting structure 224 can be provided on the front side of the battery pack compartment 21. The limiting structure 224 is provided on the support portion 221 and, together with the support portion 221, fixes the battery pack compartment 21 above the housing assembly 121.

[0074] In some embodiments, as Figure 13 As shown, the first force transmission part 222 is the front force transmission part. The first force transmission part 222 is connected to the support part 221 to receive the gravity generated by the weight of the battery pack compartment 21. The first force transmission part 222 also includes a force output part 2221 for outputting the gravity generated by the weight of the battery pack compartment 21. One end of the first force transmission part 222 is connected to the support part 221, and the other end of the first force transmission part 222 that is not connected to the support part 221 is the force output part 2221. Figure 14 As shown, the force output portion 2221 forms a first projection X1 on a plane along the vertical direction of the lawn mower 100 and passing through the axle of the front travel wheel assembly 31. The distance D3 between the first projection X1 and the axle of the front travel wheel assembly 31 is less than or equal to 50 mm, so that the gravity generated by the weight of the battery pack compartment 21 is at least partially output through the first force transmission portion 222. Optionally, the first force transmission portion 222 can be directly fixed to the housing assembly 121. Alternatively, the first force transmission portion 222 can also be indirectly fixed to the housing assembly 121 via other brackets.

[0075] In some embodiments, as Figure 13 As shown, the second force transmission part 223 is the rear force transmission part. The second force transmission part 223 is also connected to the support part 221 to receive the gravity generated by the weight of the battery pack compartment 21. The second force transmission part 223 also includes a force output part 2231 for outputting the gravity generated by the weight of the battery pack compartment 21. One end of the second force transmission part 223 is connected to the support part 221, and the other end of the second force transmission part 223 that is not connected to the support part 221 is the force output part 2231. Figure 14As shown, the force output portion 2231 forms a second projection X2 on a plane along the front-to-back direction of the lawn mower 100 and passing through the axle of the rear travel wheel assembly 32. The distance D4 between the second projection X2 and the axle of the rear travel wheel assembly 32 is less than or equal to 100 mm. The gravity generated by the weight of the battery pack compartment 21 is at least partially output through the second force transmission portion 223. Optionally, the second force transmission portion 223 can be directly fixed to the housing assembly 121. Alternatively, the second force transmission portion 223 can also be indirectly fixed to the housing assembly 121 via other brackets. By adopting the first force transmission part 222 and the second force transmission part 223 to be connected to the support part 221 respectively, and fixing the force output part 2221 of the first force transmission part 222 near the axle of the front running wheel group 31, and fixing the force output part 2231 of the second force transmission part 223 near the axle of the rear running wheel group 32, the weight of the battery pack compartment 21 (or the battery pack compartment 21 with the battery pack 20 installed) is distributed to the axle of the front running wheel group 31 and the axle of the rear running wheel group 32, thereby reducing the risk of deformation in the middle of the shell assembly 121.

[0076] In some embodiments, as Figure 15 As shown, a battery cover 211 is provided on the battery compartment 21. The battery cover 211 is at least partially transparent, allowing users to easily monitor the charge level of the battery pack 20. Optionally, the battery cover 211 can be secured to the battery compartment 21 via a locking mechanism. The locking mechanism can be provided on the battery cover 211 or the battery compartment 21. The locking mechanism includes a buckle and an elastic return member. When the user presses the buckle, the elastic return member is compressed, causing the battery cover 211 to open from the battery compartment 21. When the user releases the buckle and presses the battery cover 211, the elastic return member returns to its original position, and gravity closes the battery cover 211 on the battery compartment.

[0077] In some embodiments, the battery pack 20 can be a single battery pack, in which case the battery pack 20 is a high-capacity battery pack with a capacity greater than or equal to 40Ah. In some embodiments, the battery pack 20 can also be multiple battery packs, in which case the battery pack 20 is a low-capacity battery pack with a capacity greater than or equal to 2Ah and less than or equal to 20Ah. Whether it is a single high-capacity battery pack or multiple low-capacity battery packs, the battery pack 20 has a battery life greater than or equal to 100 minutes and a power greater than or equal to 2000W. This allows the lawn mower 100 to operate for extended periods and efficiently, avoiding the need for users to frequently replace the battery pack 20. Optionally, a high-capacity battery pack interface is provided on the battery pack compartment 21 for connecting to a high-capacity battery pack. Optionally, a low-capacity battery pack interface is also provided on the battery pack compartment 21 for connecting to a low-capacity battery pack. Optionally, a battery pack adapter can be provided on the large-capacity battery pack interface, allowing connection to multiple small-capacity battery packs. By providing a battery pack compartment 21 that can accommodate both large-capacity and multiple small-capacity battery packs, users can choose the right one based on their needs, saving on user costs. Furthermore, by providing multiple small-capacity battery packs, the inconvenience of plugging and unplugging a dead large-capacity battery pack can be resolved. With multiple small-capacity battery packs, only the dead small-capacity battery pack needs to be replaced, making replacement convenient.

[0078] In some embodiments, as Figure 11 and Figure 12 As shown, the lawn mower 100 may further include a charging device 23 for charging the battery pack 20. The charging device 23 may be provided on the battery pack compartment 21 or other user-friendly locations on the lawn mower 100 other than the battery pack compartment 21, which is not limited in this application. Figure 11 and Figure 12 is an exemplary setting position. The charging device 23 includes a charging port 231 and a charging port cover 232. When the charging device 23 is not in use, the charging port cover 232 covers the charging port 231 to prevent dust, weeds, etc. from entering the charging port 231 and affecting charging. When the charging device 23 is in use, the charging port 231 cooperates with the charging gun to charge the battery pack 20. At this time, the charging port cover 232 is pressed against the charging gun to ensure the safety of charging with the charging gun. Optionally, the charging port 231 is tilted upward to facilitate the user to charge the battery pack 20 with a charging gun. By arranging the charging device 23 on the lawn mower 100, the battery pack 20 can be directly charged when the battery pack 20 is out of power, without replacing the battery pack 20, which is convenient for users to use the lawn mower 100.

[0079] In some embodiments, the housing assembly 121 is made of a single layer of plastic. The housing assembly 121 includes a chassis 122 and a grass discharge passage 17. The chassis 122 and the grass discharge passage 17 are integrally formed. Specifically, the housing assembly 121 is integrated, and the chassis 122, the grass discharge passage 17, and the exterior of the lawn mower 100 share a single, integrally formed layer of plastic. There is no outer covering above the chassis 122 and the grass discharge passage 17, resulting in a lighter weight for the housing assembly 121, and consequently, a lighter weight for the entire lawn mower 100.

[0080] In some embodiments, the drive assembly 14 is disposed in the chassis 122, specifically in the accommodating cavity 15 of the chassis 122. Figure 16 As shown, since the housing assembly 121 is made of a single layer of plastic, there is no outer covering above the chassis 122, so that the drive assembly 14 is exposed from the housing assembly 121. To prevent the drive assembly 14 from being exposed, the lawn mower 100 further includes a drive assembly outer cover 143, which is disposed on the upper side of the housing assembly 121 to shield the drive assembly 14 and prevent water or debris from falling onto the drive assembly 14.

[0081] In some embodiments, the hub of the running wheel assembly 30 is made of alloy plastic, which is a high-strength alloy plastic, which reduces the weight while ensuring the strength of the hub. In some embodiments, the handle assembly 11 is a hollow metal handle. The handle assembly 11 can be directly fixed to the shell assembly 121, or fixed to the shell assembly 121 through a metal reinforcement plate, which can ensure the connection strength. A switch is provided on the handle assembly 11 to control the walking, cutting or stopping of the lawn mower 100. The connecting line for controlling the lawn mower 100 is provided inside the handle tube of the handle assembly 11 to prevent the connecting line from being damaged by the outside. By providing the hub of the running wheel assembly 30 made of high-strength alloy plastic and the hollow metal handle 11, the weight of the lawn mower 100 is further reduced. The weight of the lawn mower 100 is made less than or equal to 60 kg when accessories such as the battery pack 20 are not installed. In addition, the above-mentioned method of the present application will distribute the weight of the battery pack compartment 21 (or the battery pack compartment 21 with the battery pack 20 installed) to the axle of the front running wheel group 31 and the axle of the rear running wheel group 32. This is to avoid the risk of deformation of the shell assembly 121 made of a single layer of plastic while ensuring the lightweight of the entire lawn mower 100, thereby improving the stability of the overall structure of the lawn mower 100.

[0082] In some embodiments, the diameter of the front running wheel set 31 is greater than or equal to 150 mm and less than or equal to 300 mm. The diameter of the rear running wheel set 31 is greater than or equal to 150 mm and less than or equal to 300 mm. Optionally, the diameter of the front running wheel set 31 can be 200 mm, and the diameter of the rear running wheel set 32 can be 270 mm. Figure 14As shown, the distance D5 between the front running wheel group 31 and the rear running wheel group 32 is greater than or equal to 700 mm and less than or equal to 750 mm. The distance between the front running wheel group 31 and the rear running wheel group 32 is not large, so that the length of the lawn mower 100 is not long, further improving the lightweight of the lawn mower 100. At the same time, it avoids the problem that the length dimension of the lawn mower 100 in the front-to-back direction is large, which leads to an increase in the front-to-back wheelbase (i.e., the distance between the axles of the front running wheel group 31 and the rear running wheel group 32) and weak support rigidity of the shell assembly 121. In addition, according to the above description of the present application, the center line of the lawn mower 100 coincides with the center line 154 of the cutter disc, avoiding the large width dimension of the lawn mower 100 in the left-right direction, which is conducive to the miniaturization of the size of the lawn mower 100 and further improving the lightweight of the lawn mower 100.

[0083] In some embodiments, as Figure 17 As shown, the distance D6 between the center of gravity G of the battery pack 20 and the plane corresponding to the rotation center of the rear travel wheel assembly 32 is less than or equal to 300 mm. The plane is a plane along the up-down direction of the lawn mower 100 and passing through the rotation center of the rear travel wheel assembly 32. The rotation center of the rear travel wheel assembly 32 refers to the rotation center of the wheel axle of the rear travel wheel assembly 32. Since the height of the rear travel wheel assembly 32 needs to be adjusted when the lawn mower 100 is in use, the wheel axle of the rear travel wheel assembly 32 will rotate around the rotation axis for adjusting the height of the rear travel wheel assembly 32. The distance D7 between the center of gravity G of the battery pack 20 and the plane corresponding to the rotation center of the front travel wheel assembly 31 is greater than or equal to 400 mm. The plane is a plane along the up-down direction of the lawn mower 100 and passing through the rotation center of the front travel wheel assembly 31. The rotation center of the front travel wheel assembly 31 refers to the rotation center of the wheel axle of the front travel wheel assembly 31. Since the height of the front running wheel assembly 31 needs to be adjusted when the lawn mower 100 is in use, the axle of the front running wheel assembly 31 will rotate around the rotating shaft for adjusting the height of the front running wheel assembly 31. That is, the center of gravity G of the battery pack 20 is biased toward the rear end in the front-to-back direction, so that the center of gravity of the entire lawn mower 100 is biased toward the rear end. When the user controls the lawn mower 100 to turn or move, it is relatively convenient to press down the lawn mower 100 through the handle assembly 11 to turn. At this time, based on the fact that the center of gravity G of the lawn mower 100 is biased toward the rear end and the weight of the entire lawn mower 100 is relatively light, the tilting force of the lawn mower 100 is relatively small, and the user can relatively easily press down the lawn mower 100 from the rear to make the lawn mower 100 tilt. Among them, the tilting force of the lawn mower 100 is less than or equal to 150N.

[0084] Optionally, the front travel wheel set 31 of the lawn mower 100 may be a universal wheel or a McNabb wheel, and the rear travel wheel set 32 may be controlled by two motors, one motor controlling the left travel wheel of the rear travel wheel set 32 and the other motor controlling the right travel wheel of the rear travel wheel set 32. Thus, a speed difference is generated between the left and right travel wheels to control the turning of the lawn mower 100.

[0085] In some embodiments, as Figure 13 and Figure 18 As shown, the lawn mower 100 further includes a reinforcement 40, which is arranged on the upper side of the housing assembly 121 and covers the housing assembly 121. The reinforcement 40 includes multiple reinforcements 40 along the front-back direction and the left-right direction of the lawn mower 100 to ensure that the housing assembly 121 is not easily deformed, thereby improving the overall strength of the lawn mower 100. Figure 13 and Figure 18 As shown, the reinforcement 40 also includes a reinforcement 40 provided at the front end of the lawn mower 100, so that when the lawn mower 100 collides with foreign objects while moving forward, the shell assembly 121 can be ensured not to be damaged by the impact. In addition, the battery pack frame 22 of the battery pack 20 can also serve as the reinforcement 40 of the lawn mower 100. When the lawn mower 100 rolls over, the reinforcement 40 (i.e., the battery pack frame 22) will protect the battery pack compartment 21 and the lawn mower 100. Optionally, the reinforcement 40 can be made of metal. Optionally, the reinforcement 40 can also be made of hollow metal. Optionally, the reinforcement 40 can also be made of plastic.

[0086] like Figure 19 and Figure 20 As shown, the housing assembly 121 is formed with a storage space 50, a heat dissipation air inlet 501 and a heat dissipation air outlet 502. The heat dissipation air inlet 501 and the heat dissipation air outlet 502 can both communicate with the inside and outside of the storage space 50. The storage space 50 includes a first storage space 51 and a second storage space 52, and the first storage space 51 is provided with electronic components. The second storage space 52 includes at least two independent storage chambers 15, and the driving assembly 14 includes at least two motors, and the at least two motors are respectively provided in different storage chambers 15. Figure 21 As shown, the lawn mower 100 further includes a heat dissipation channel 60. A first end of the heat dissipation channel 60 is connected to the first accommodating space 51, and a second end of the heat dissipation channel 60 includes at least one connecting end, each of which is connected to at least one of the at least two accommodating chambers 15. Thus, when the lawn mower 100 is in operation, heat dissipation air flows in through the heat dissipation airflow inlet 501, passes through the electronic components in the first accommodating space 51 and the drive assembly 14 in the second accommodating space 52, and then flows out through the heat dissipation airflow outlet 502.

[0087] like Figure 19As shown, the lawn mower 100 also includes a cover plate 70, which is detachably arranged on the housing assembly 121, and a heat dissipation airflow inlet 501 is arranged on the cover plate 70. The heat dissipation airflow inlet 501 includes a first heat dissipation airflow inlet 5011 and a second heat dissipation airflow inlet 5012, and the first heat dissipation airflow inlet 5011 and the second heat dissipation airflow inlet 5012 are both arranged on the cover plate 70, specifically, respectively arranged on both sides of the cover plate 70. The left side of the cover plate 70 includes a plurality of air vents, and the plurality of air vents on the left side constitute the first heat dissipation airflow inlet 5011. The right side of the cover plate 70 also includes a plurality of air vents, and the plurality of air vents on the right side constitute the second heat dissipation airflow inlet 5012. Among them, the air vents can be circular, and in this case the diameter of each air vent is greater than or equal to 3 mm and less than or equal to 10 mm, so that the heat dissipation airflow can enter more fully through the heat dissipation airflow inlet 501. In addition, the air vents can also be other shapes, which are not limited in this application. As Figure 22 As shown, the heat dissipation airflow inlets 501 face forward and are located on both sides of the battery pack 20 relative to the battery pack 20. Therefore, when the lawn mower 100 is in use, the heat dissipation airflow is not blocked by the battery pack 20 and flows into the first accommodation space 51 through the heat dissipation airflow inlets 501 on both sides of the battery pack 20.

[0088] like Figure 23 As shown, the cover plate 70 is provided with a guide channel 71, which is located on the lower side of the cover plate 70, that is, on the side of the cover plate 70 facing the first accommodating space 51. Thus, after the heat dissipating airflow enters through the heat dissipating airflow inlet 501 on the cover plate 70, it can flow along the guide channel 71 into the first accommodating space 51. After entering through the first heat dissipating airflow inlet 5011 and the second heat dissipating airflow inlet 5012, the heat dissipating airflow flows along the guide channel 71 toward the center of the lawn mower 100.

[0089] In some embodiments, after the heat dissipation airflow enters the first accommodation space 51, it dissipates heat for the electronic components in the first accommodation space 51. The electronic components include a motor control board electrically connected to the motor and a power control board electrically connected to the battery pack 20. The heat dissipation airflow flows through the power control board and the motor control board in sequence. Optionally, since there are at least two motors, the number of motor control boards can be the same as the number of motors, that is, at least two motor control boards. Optionally, the motor control board can also be one motor control board, and at least two motors are controlled by one motor control board. Optionally, both the motor control board and the power control board include heat sinks, and the heat sinks are arranged along the up and down directions of the lawn mower 100. When the heat dissipation airflow flows through the power control board and the motor control board, it flows from top to bottom. The flow direction of the heat dissipation airflow is consistent with the setting direction of the heat sink, thereby improving the heat dissipation effect of the heat dissipation airflow on the power control board and the motor control board.

[0090] In some embodiments, after the heat dissipation airflow passes through the electronic components, it flows to the second accommodation space 52 through the heat dissipation channel 60. Figure 24 As shown, the heat dissipation channel 60 is independent of the housing assembly 121. The heat dissipation channel 60 is formed by a part molded separately from the housing assembly 121. The heat dissipation channel 60 is arranged on the upper side of the housing assembly 121. The first end of the heat dissipation channel 60 is a heat dissipation channel inlet 61, which is connected to the housing assembly 121 and is used to receive the heat dissipation airflow flowing out of the first accommodating space 51. The second end of the heat dissipation channel 60 is a heat dissipation channel outlet 62, and the heat dissipation channel outlet 62 includes at least two outlets. Optionally, the number of outlets is the same as the number of accommodating cavities 15 (or motors), and each outlet is connected to one accommodating cavity 15. As shown in FIG. Figure 21 As shown, this application takes two accommodating chambers 15 (two motors) as an example, with the first motor 141 disposed in the first accommodating chamber 155 and the second motor 142 disposed in the second accommodating chamber 156. The heat dissipation channel outlet 62 then includes two outlets: a first outlet 621 connected to the first accommodating chamber 155 and a second outlet 622 connected to the second accommodating chamber 156. Optionally, the number of outlets may differ from the number of accommodating chambers 15, and this application does not limit this.

[0091] like Figure 20 As shown, the lawn mower 100 also includes a fan 144 connected to the motor. When the lawn mower 100 is in operation, the rotation of the motor drives the fan 144, causing cooling air to flow from the heat dissipation channel inlet 61 to the heat dissipation channel outlet 62, and then into the second accommodating space 52. The rotation of the first motor 141 drives the corresponding fan 144 to rotate, causing cooling air to flow from the heat dissipation channel inlet 61 to the first outlet 621, and from there into the first accommodating chamber 155, dissipating heat for the first motor 141. The rotation of the second motor 142 drives the corresponding fan 144 to rotate, causing cooling air to flow from the heat dissipation channel inlet 61 to the second outlet 622, and from there into the second accommodating chamber 156, dissipating heat for the second motor 142. Therefore, the cooling air first dissipates heat for the electronic components in the first accommodating space 51, and then for the drive assembly 14 in the second accommodating space 52. The cooling air outlet 502 specifically connects the inside and outside of the second accommodating space 52. That is, after the cooling airflow dissipates heat for the drive assembly 14, it flows out of the second accommodating space 52 based on the rotation of the fan 144, flows toward the bottom of the lawn mower 100, and flows out of the interior of the lawn mower 100. Furthermore, the cooling airflow flows in through the cooling airflow inlet 501, along the guide channel 71, and through the electronic components in the first accommodating space 51, all based on the rotation of the fan 144.

[0092] In some embodiments, as Figure 24As shown, the heat dissipation channel 60 includes a cooling area 63, located between the heat dissipation channel inlet 61 and the heat dissipation channel outlet 62. This allows the heat dissipation airflow to cool down the electronic components after dissipating heat, thereby better dissipating heat for the driver assembly 14. In some embodiments, the lower side of the heat dissipation channel 60 includes a water droplet 64, located below the heat dissipation channel inlet 61 and the heat dissipation channel outlet 62. This allows water that enters the heat dissipation channel 61 to be discharged through the water droplet 64, preventing the water from entering the driver assembly 14.

[0093] like Figure 25 As shown, in order to facilitate users of different heights to operate the lawn mower 100, the lawn mower 100 also includes a handle height adjustment mechanism 80, which includes an outer gear disc, an inner gear disc and a knob. The inner gear disc is arranged on the main body 12, and the outer gear disc and the inner gear disc are rotatably engaged. The knob passes through the handle tube and is movably connected to the outer gear disc.

[0094] In some embodiments, a support plate is provided between the inner gear disc and the main unit 12. The inner gear disc is connected to the support plate through a connecting piece. The support plate is also marked with a height gear scale. An indicator mark is provided on the outer gear disc. Through the correspondence between the indicator mark and the number on the height gear scale, the user can clearly know the current height gear of the handle tube.

[0095] In some embodiments, a Hall effect element is provided on the inner gear disc, and a ring magnet is provided on the outer gear disc. The ring magnet is larger than the Hall effect element and has a predetermined length. Optionally, the length of the ring magnet is determined based on whether the Hall effect element can sense the ring magnet when the indicator mark corresponds to a number on the height scale.

[0096] When the handle tube is in the height position corresponding to the number on the height scale, the Hall effect element can sense the annular magnet, allowing the lawn mower 100 to start normally. When the handle tube is not in the height position corresponding to the number on the height scale, the annular magnet is far away from the Hall effect element, and the Hall effect element cannot sense the annular magnet, preventing the lawn mower 100 from starting normally. Therefore, when the handle tube of the lawn mower 100 is in a folded state or other non-operating state where the indicator mark does not correspond to the number on the height scale, the lawn mower 100 cannot start, improving the safety of using the lawn mower 100.

[0097] like Figure 26 As shown, the lawn mower 100 includes a front height adjustment mechanism 81 and a rear height adjustment mechanism 82. The front height adjustment mechanism 81 is used to adjust the height of the front portion of the main unit 12, and the rear height adjustment mechanism 82 is used to adjust the height of the rear portion of the main unit 12. Optionally, the lawn mower 100 can be a double-disc lawn mower or a single-disc lawn mower, which is not limited in this application.

[0098] In some embodiments, the front height adjustment mechanism 81 includes a first elastic member and a front height adjustment shaft. One end of the first elastic member is connected to the main unit 12, and the other end of the first elastic member is connected to the front height adjustment shaft. When adjusting the height of the front of the main unit 12, the base plate of the main unit 12 will fall under the action of gravity. The elastic force of the first elastic member can offset gravity, allowing the user to adjust the height by simply holding the base plate, saving time and effort. In some embodiments, the first elastic member is a torsion spring, which is mounted on the front height adjustment shaft, with one end of the torsion spring abutting the base plate of the main unit 12 and the other end connected to a fixed plate fixed to the front height adjustment shaft.

[0099] In some embodiments, the rear height adjustment mechanism 82 includes a second elastic member and a rear height adjustment shaft. One end of the second elastic member is connected to the main unit 12, and the other end is connected to the rear height adjustment shaft. Since the base plate of the main unit 12 will drop under the force of gravity when adjusting the rear height of the main unit 12, the elastic force of the second elastic member can offset gravity, allowing the user to adjust the height by gently supporting the base plate, saving time and effort. In some embodiments, the second elastic member is a tension spring, one end of which is connected to a tension spring hook provided on the base plate of the main unit 12, and the other end is fixedly connected to the rear height adjustment shaft. Optionally, to improve the mowing efficiency of the lawn mower and prevent the lawn mower 100 from becoming stuck in the grass during operation, the front and rear height adjustment mechanisms 81 and 82 can be used to adjust the overall height of the main unit 12 higher. Specifically, the chassis 122 of the lawn mower 100 is further from the ground, and the thickness of the front end of the housing assembly 121 can be reduced in the vertical direction, thereby reducing the contact area with the grass and reducing resistance when the lawn mower 100 moves forward.

[0100] In some embodiments, the wheel hub motor is used to control the movement or turning of the rear wheel group 32 of the lawn mower 100. The wheel hub motor is controlled by connecting the wheel hub motor harness 90 to the corresponding wheel hub motor control board. Figure 27 As shown, the wheel hub motor harness 90 includes a first end 91 and a second end 92. The first end 91 is used to connect to the wheel hub motor, and the second end 92 is used to connect to the wheel hub motor control board. Figure 28As shown, the hub motor wiring harness 90 connects the hub motor control board and the hub motor through a connection hole 93. Optionally, since the rear height adjustment mechanism 82 can be used to adjust the rear height of the mower 100, to prevent the hub motor wiring harness 90 from twisting when the rear height adjustment mechanism 82 is used, which could potentially cause the hub motor wiring harness 90 to break, the connection hole 93 serves as the rotation center for the rear height adjustment mechanism 82 when the rear height adjustment mechanism 82 is adjusted. Thus, since the rear height adjustment mechanism 82 is always adjusted around the rotation center, the hub motor wiring harness 90 will not twist. Optionally, a spring wire may be wrapped around the hub motor wiring harness 90 to protect it and reduce wear. Optionally, a bearing may be installed within the hub motor, through which the hub motor wiring harness 90 connects to the hub motor control board. This reduces wear on the hub motor wiring harness 90.

[0101] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A lawn mower comprising: a mowing element comprising a first blade and a second blade that perform a cutting function; A chassis is formed with an accommodating cavity for accommodating at least part of the mowing element, wherein a first cutter disc and a second cutter disc are arranged in the accommodating cavity; wherein the first blade is arranged in the first cutter disc, and the second blade is arranged in the second cutter disc; A drive assembly includes a first motor and a second motor for driving the mowing element to rotate; wherein the first motor controls the first blade, and the second motor controls the second blade; Characterized in that the lawn mower further comprises a side discharge assembly for performing a grass discharge function, wherein the side discharge assembly is connected to the second cutter disc; There is a communication area between the first cutter disc and the second cutter disc; The rotation direction of the first motor is opposite to the rotation direction of the second motor; The first motor controls the first blade to drive the grass clippings in the first blade disc into the second blade disc through the connecting area; the second motor controls the second blade to drive the grass clippings in the second blade disc into the side discharge assembly.

2. The lawn mower according to claim 1, wherein The lawn mower further includes a side row cover plate disposed between the second cutting disc and the side row assembly.

3. The lawn mower according to claim 2, wherein: Before the side discharge assembly performs the grass discharge function, the side discharge cover is in an open state, so that the second blade disc is connected to the side discharge assembly.

4. The lawn mower according to claim 1, wherein: An angle formed between a line connecting the centers of the first cutter disc and the second cutter disc and a plane extending in the left-right direction of the lawn mower is greater than or equal to 5 degrees and less than or equal to 60 degrees.

5. The lawn mower according to claim 1, wherein: The distance between the first blade and the second blade is greater than or equal to 3 mm and less than or equal to 10 mm.

6. The lawn mower according to claim 1, wherein: A projected length of a cutting overlap dimension of the first blade and the second blade on a plane extending in the left-right direction of the lawn mower is greater than or equal to 5 mm.

7. The lawn mower according to claim 1, wherein: The channel width of the communication area is greater than or equal to 80 mm.

8. The lawn mower according to claim 1, wherein: The lawn mower further includes a grass discharge channel, which includes a rear grass discharge port arranged at the rear end of the lawn mower; wherein the grass discharge channel is connected to the second cutter disc.

9. The lawn mower according to claim 8, wherein The grass discharge channel includes a first end connected to the second blade disc and a second end connected to the rear grass discharge port. In the up and down direction, the second end is higher than the first end.

10. The lawn mower according to claim 8, wherein The lawn mower further includes a rear-row blocking plate, which is arranged at the first end of the grass discharge channel connected to the second blade disc.

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