Lawn mower

Abstract

This utility model provides a lawnmower, including a main unit, a roller assembly, and a blade assembly. The roller assembly is located at the bottom of the main unit, between the front and rear of the main unit. The blade assembly includes a blade holder and multiple blade disc assemblies mounted on the blade holder, each blade disc assembly being located at the front of the main unit. In this lawnmower, with each blade disc assembly positioned at the front of the main unit, when the main unit is driven forward by the roller assembly, the blade disc assemblies are always positioned in front of the roller assembly in the forward direction of the main unit. This ensures that the lawn cut by the blade disc assemblies is not crushed by the roller assembly, preventing missed cuts.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology, and more specifically, it relates to a lawnmower. Background Technology

[0002] In garden maintenance and lawn mowing, lawnmowers are commonly used tools, and the design of their blades has a crucial impact on the efficiency and quality of mowing. Currently, most common lawnmower blades are either single-blade or double-blade structures. Regardless of whether it's a single-blade or double-blade design, it's easy for missed areas to occur during lawn mowing, leading to poor mowing results and efficiency. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a lawnmower to solve the technical problem of easy omissions during lawn mowing in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a lawnmower, comprising:

[0005] The main unit has a front and a rear that are positioned relative to each other;

[0006] A roller assembly is disposed at the bottom of the main unit, and the roller assembly is located between the front and rear parts of the main unit; and

[0007] The cutting blade assembly includes a blade holder and multiple blade disc assemblies disposed on the blade holder, each of the blade disc assemblies being disposed at the front of the main unit.

[0008] Optionally, the number of the cutter head assemblies is three, and they are arranged along the lateral direction of the host, which is perpendicular to the forward direction of the host.

[0009] Optionally, the three cutter head assemblies are arranged in a straight line.

[0010] Optionally, the three cutter heads are arranged in a V-shape, with the middle cutter head assembly being closer to the rear of the host unit than the cutter head assemblies on either side.

[0011] Optionally, the lawnmower also includes a caster assembly located at the bottom of the main unit, and the central blade assembly is a central blade assembly, with the caster assembly located on the front side of the central blade assembly.

[0012] Optionally, in the lateral direction, the trimming areas covered by two adjacent cutter disc assemblies partially overlap.

[0013] Optionally, the cutter head assembly includes a drive member fixed to the cutter holder, a cutter head body driven to rotate by the drive member, a blade disposed on the cutter head body, and a slide plate coaxial with and spaced apart from the cutter head body, wherein the slide plate is positioned facing away from the cutter head body and is intended to face the ground.

[0014] Optionally, the output shaft of the drive unit is connected to the cutter head body via a coupling assembly. The coupling assembly includes a connecting sleeve and a connecting screw. The connecting sleeve has a first inner hole and a second inner hole that communicate with each other. The output shaft extends into the first inner hole, and the connecting screw passes through the second inner hole and is threadedly connected to the output shaft. The cutter head body is fixed to the connecting sleeve.

[0015] Optionally, the outer peripheral wall of the connecting sleeve extends radially outward to form an annular boss, and the cutter head body has a central hole through which the connecting sleeve passes. The annular boss is connected to the cutter head body by a first screw.

[0016] Optionally, a sliding plate seat is provided on the outer periphery of the connecting sleeve, and the sliding plate seat and the sliding plate are fixedly connected by a second screw. A rolling bearing is provided between the inner peripheral wall of the sliding plate seat and the outer peripheral wall of the connecting sleeve.

[0017] The beneficial effects of the lawnmower provided by this utility model are as follows: Compared with the prior art, the lawnmower of this utility model includes a main unit, a roller assembly and a cutting blade assembly. The cutting blade assembly includes a blade holder and multiple blade disc assemblies. Each blade disc assembly is located at the front of the main unit. When the main unit is driven forward by the roller assembly, the blade disc assembly is always located at the front of the roller assembly in the forward direction of the main unit. The lawn cut by the blade disc assembly is not crushed by the roller assembly, and there will be no missed cuts. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A bottom view of the first type of lawnmower provided in this embodiment of the utility model;

[0020] Figure 2 A bottom view of a second type of lawnmower provided in an embodiment of this utility model;

[0021] Figure 3 A bottom view of a third type of lawnmower provided in this embodiment of the utility model;

[0022] Figure 4 A bottom view of the fourth type of lawnmower provided in this embodiment of the utility model;

[0023] Figure 5 A perspective structural view of the cutter assembly provided in an embodiment of this utility model;

[0024] Figure 6 A cross-sectional view of the cutter assembly provided in an embodiment of this utility model;

[0025] Figure 7 A perspective structural view of the cutter head assembly provided in an embodiment of this utility model;

[0026] Figure 8 A cross-sectional view of the cutter head assembly provided in an embodiment of this utility model.

[0027] The following are the labeling elements in the figure:

[0028] 10-Main unit; 20-Cutter assembly; 21-Cutter holder; 211-Shaft hole; 22-Cutter disc assembly; 221-Driver; 222-Cutter disc body; 2221-First connecting hole; 2222-Limiting ring; 223-Blade; 224-Coupling assembly; 2241-Connecting sleeve; 22411-First inner hole; 22412-Second inner hole; 22413-Annular boss; 22414-Second connecting hole; 2242-Connecting screw; 225-Slide plate; 226-Slide plate seat; 227-Rolling bearing; 30-Roller assembly; 40-Universal wheel assembly. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In garden maintenance and lawn mowing, lawnmowers are commonly used tools, and the design of their blades has a crucial impact on the efficiency and quality of mowing. Currently, most common lawnmower blades are either single-blade or double-blade structures. Regardless of whether it's a single-blade or double-blade design, it's easy for missed mowing spots to occur, leading to poor mowing results and efficiency. Specifically, when a lawnmower is working, it needs to be driven forward by its wheels. During contact with the grass, the wheels flatten some of the grass, preventing it from being mowed and causing missed areas to appear.

[0034] To alleviate or solve the above technical problems, this utility model proposes a new lawnmower. By setting the blade assembly 22 of the cutter assembly 20 in front of the roller assembly 30, the grass can be trimmed before the roller assembly 30 crushes it, thus avoiding missed cuts.

[0035] The lawnmower provided in the embodiments of this utility model will now be described.

[0036] Please refer to the following: Figures 1 to 4 Lawn mowers include:

[0037] The main unit 10 has a front and a rear that are positioned relative to each other;

[0038] A roller assembly 30 is disposed at the bottom of the main unit 10, and the roller assembly 30 is positioned between the front and rear parts of the main unit 10; and

[0039] The cutting blade assembly 20 includes a blade holder 21 and multiple blade disc assemblies 22 disposed on the blade holder 21. Each blade disc assembly 22 is disposed at the front of the main unit 10.

[0040] The main unit 10 is the core structure of the lawnmower. It generally consists of a housing and internal functional modules. The roller assembly 30 and the cutter assembly 20 are both mounted on the main unit 10. The main unit 10 has a front and a rear section arranged opposite each other. When the main unit 10 moves forward, the part closer to the front is called the front section of the main unit 10, and the part closer to the rear is called the rear section. The front section of the main unit 10 can be either a side wall or a bottom wall; similarly, the rear section of the main unit 10 can also be either a side wall or a bottom wall.

[0041] The roller assembly 30 is located at the bottom of the main unit 10. The roller assembly 30 can roll (rotate) on the main unit 10. When the lawnmower is placed on the ground, the roller assembly 30 is in contact with the ground. When the user pushes the lawnmower forward, the roller assembly 30 rotates, driving the main unit 10 forward. The roller assembly 30 allows the lawnmower to move smoothly forward and backward, and also maintains a certain distance between the main unit 10 and the ground, preventing it from trampling on the lawn. The roller assembly 30 is also located between the front and rear of the main unit 10. It should be noted that as long as the roller assembly 30 is not directly attached to the front or rear side wall of the main unit 10, it can be understood as being located between the front and rear of the main unit 10.

[0042] The blade assembly 20 is used for mowing grass and is mounted on the main unit 10. The blade assembly 20 includes a blade holder 21 and multiple blade disc assemblies 22, which are used for mowing grass. When there are multiple blade disc assemblies 22, the modification range of the lawnmower can be increased, the cutting efficiency can be improved, and the grass at the edges can also be trimmed cleanly.

[0043] Each cutter head assembly 22 is located at the front of the main unit 10, while the roller assembly 30 is located between the front and rear of the main unit 10. In other words, the cutter head assembly 22 is located in front of the roller assembly 30. During the forward movement of the lawnmower, the grass to be cut is cut by the cutter head assembly 22 before it is flattened by the roller assembly 30, reducing the occurrence of missed grass cutting.

[0044] The lawnmower in the above embodiment includes a main unit 10, a roller assembly 30, and a blade assembly 20. The blade assembly 20 includes a blade holder 21 and multiple blade disc assemblies 22. Each blade disc assembly 22 is located at the front of the main unit 10. When the main unit 10 is driven forward by the roller assembly 30, the blade disc assembly 22 is always located at the front of the roller assembly 30 in the forward direction of the main unit 10. The lawn cut by the blade disc assembly 22 is not crushed by the roller assembly 30, and there will be no missed cuts.

[0045] Please refer to some embodiments of this utility model. Figures 1 to 4There are three blade assembly 22s, arranged along the transverse direction of the main unit 10, which is perpendicular to the forward direction of the main unit 10. The three blade assembly 22s arranged along the transverse direction of the main unit 10 mean that each blade assembly 22 corresponds to a specific area being cut as the lawnmower moves forward. These areas are arranged along the transverse direction of the main unit 10, allowing for the cutting of a larger area of ​​grass at once, thus improving cutting efficiency. It should be noted that when multiple blade assembly 22s are arranged along the transverse direction of the main unit 10, the lines connecting the centers of the multiple blade assembly 22s may or may not be on the same straight line, as long as the centers of adjacent blade assembly 22s are spaced apart in the transverse direction.

[0046] By setting the number of blade assembly 22 to three and arranging the three blade assembly 22 along the lateral direction of the main unit 10, the blade assembly 22 can cover a larger area in the lateral direction, making the blade assembly 22 more efficient in trimming, and the grass at the edge of the cutter assembly 20 is easier to trim.

[0047] In some embodiments, please refer to Figure 1 and Figure 2 The three blade assembly 22 are arranged in a straight line, which can cover a larger trimming range and makes the arrangement of the blade assembly 22 simpler.

[0048] Optionally, please refer to Figure 1 The centers of the multiple blade assemblies 22 are connected by a straight line that is parallel to the lateral direction. Thus, by designing the distance between adjacent blade assemblies 22, weeding can be minimized while still covering a large trimming area.

[0049] Optionally, please refer to Figure 2 The centers of multiple cutter head assemblies 22 are connected by a straight line, and this line is set at an acute angle to the transverse direction. Figure 2 In the middle, the cutter head assembly 22 on the right is closer to the roller assembly 30. In other embodiments, the cutter head assembly 22 on the left may be closer to the roller assembly 30.

[0050] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 The three cutter head assemblies 22 are arranged in a V-shape, with the middle cutter head assembly 22 being closer to the rear of the main unit 10 than the two side cutter head assemblies 22. This V-shaped arrangement can be understood as two cutter head assemblies 22 being located at the two apex of the V, and the third cutter head assembly 22 being located at the bottom of the V. The middle cutter head assembly 22 is at the bottom of the V. Being closer to the rear of the main unit 10 means that the middle cutter head assembly 22 is closer to the roller assembly 30.

[0051] By designing the three blade assembly 22 in a V-shape, the blade assembly 22 is staggered, allowing the rear blade assembly 22 to trim the weeds that the front blade assembly 22 did not reach, resulting in a better final trimming effect.

[0052] In other embodiments, the three cutter head assemblies 22 are arranged in an inverted V-shape, and the middle cutter head assembly 22 is closer to the front of the host 10 than the cutter head assemblies 22 on both sides. That is, the middle cutter head assembly 22 is farther away from the roller assembly 30.

[0053] In some embodiments, in the lateral direction, the trimming areas covered by two adjacent cutter head assemblies 22 partially overlap. That is, the area trimmed by the cutter head assemblies 22 on both sides can be partially trimmed again by the middle cutter head assembly 22. The trimming areas of the cutter head assembly 22 are all circular, and after projecting the three circular areas along the forward direction, the adjacent circular areas partially overlap.

[0054] In the lateral direction, by partially overlapping the trimming areas covered by two adjacent blade assembly 22, the missed trimming areas between the two adjacent blades can be eliminated. Compared with the scheme where the two adjacent blade assemblies 22 are spaced apart in the lateral direction, there will be no trimming blind spots between the two blade assemblies 22, which can improve the efficiency and quality of lawn trimming.

[0055] In some embodiments, the trimming areas covered by two adjacent cutter disc assemblies 22 are spaced apart from each other in the lateral direction. In this embodiment, multiple cutter disc assemblies 22 can cover a larger trimming range, thereby improving trimming efficiency and reducing the user's workload.

[0056] Please refer to some embodiments of this utility model. Figure 4 The three blade assembly 22 are arranged in a V-shape, with the middle blade assembly 22 being closer to the rear of the main unit 10 than the two side blade assemblies 22. The lawnmower also includes a caster wheel assembly 40 located at the bottom of the main unit 10. The middle blade assembly 22 is the central blade assembly 22, and the caster wheel assembly 40 is located in front of the central blade assembly 22. The caster wheel assembly 40 is omnidirectionally mounted on the bottom of the main unit 10 and can rotate in any direction. The caster wheel assembly 40 is used to change the forward direction of the lawnmower.

[0057] By placing the caster wheel assembly 40 in front of the central cutter head assembly 22, the bottom walking mechanism structure composed of the caster wheel assembly 40 and the roller assembly 30 becomes more balanced, providing more stable support for the main unit 10 and reducing the possibility of the lawnmower tipping over. At the same time, the caster wheel assembly 40 is generally small in size and will only crush a small portion of the grass; therefore, its placement in the central cutter head assembly 22 has little impact on the mowing effect.

[0058] Please refer to some embodiments of this utility model. Figure 3 The three blade assembly 22 are arranged in a V-shape, with the middle blade assembly 22 being closer to the front of the main unit 10 than the two side blade assemblies 22. The lawnmower also includes a caster wheel assembly 40 located at the bottom of the main unit 10. The middle blade assembly 22 is the central blade assembly 22, and the caster wheel assembly 40 is located behind the central blade assembly 22. The caster wheel assembly 40 is omnidirectionally mounted on the bottom of the main unit 10 and can rotate in any direction. The caster wheel assembly 40 is used to change the forward direction of the lawnmower.

[0059] By placing the caster wheel assembly 40 behind the central cutter head assembly 22, the grass can be trimmed by the central cutter head assembly 22 before being trampled down by the caster wheel assembly 40, thus improving the quality of lawn mowing.

[0060] Please refer to some embodiments of this utility model. Figures 1 to 4 The roller assembly 30 is manually pushed by the user to rotate, which drives the main unit 10 to move forward or backward.

[0061] Please refer to some embodiments of this utility model. Figures 1 to 4 The roller assembly 30 is driven by a motor and other mechanisms, which automatically drives the main unit 10 to move forward or backward. Users only need to adjust the forward direction of the main unit 10 without having to exert a lot of force to push the main unit 10, which can reduce the workload of users when using the lawnmower.

[0062] Please refer to some embodiments of this utility model. Figures 5 to 8 The cutter head assembly 22 includes a drive member 221 fixed to the cutter holder 21, a cutter head body 222 driven to rotate by the drive member 221, blades 223 disposed on the cutter head body 222, and a slide plate 225 coaxially and spaced apart from the cutter head body 222. The slide plate 225 is positioned facing away from the cutter head body 222 and is intended to face the ground. Each cutter head assembly 22 is fixed to the cutter holder 21, which can be fixed to the main unit 10, thus allowing the cutter head assembly 22 to be mounted on the main unit 10. The cutter head body 222 can be driven to rotate by the drive member 221. During the rotation of the cutter head body 222, the blades 223 also rotate with the cutter head body 222, thereby causing the blades 223 to rotate and cut the grass near the cutter head body 222. The cutter head body 222 and the slide plate 225 are coaxially arranged. When the lawnmower is in use, the top side of the slide plate 225 faces the cutter head body 222, and the bottom side of the slide plate 225 faces the bottom surface.

[0063] By setting up the slide plate 225, the center of the cutter head body 222 can be separated from the ground, preventing grass from the center of the cutter head body 222 from extending into the shaft of the cutter head body 222 and causing the cutter head body 222 to be blocked by grass, and also reducing the friction between the cutter head body 222 and the ground.

[0064] In some embodiments, the tool holder 21 is fixedly mounted by fasteners such as screws. The tool holder 21 is connected to the housing of the main unit 10 by screws, making the tool holder 21 detachably connected to the housing of the main unit 10, which facilitates the replacement of the tool holder 21.

[0065] In some embodiments, the tool holder 21 is fixed to the bottom of the main unit 10, or the tool holder 21 is fixed to the front side wall of the main unit 10.

[0066] In some embodiments, the side of the slide 225 facing the ground is a smooth surface, which reduces the friction between the slide 225 and the ground.

[0067] In some embodiments, the outer diameter of the slide 225 is smaller than the outer diameter of the cutter head body 222, so as to prevent the slide 225 from crushing too much grass, which would prevent the blade 223 from effectively cutting the grass.

[0068] In some embodiments, the drive element 221 is a motor, which can output rotational motion to drive the cutter head body 222 to rotate.

[0069] Please refer to some embodiments of this utility model. Figure 8 The output shaft of the drive component 221 is connected to the cutter head body 222 via a coupling assembly 224. The coupling assembly 224 includes a connecting sleeve 2241 and a connecting screw 2242. The connecting sleeve 2241 has a first inner hole 22411 and a second inner hole 22412 that are interconnected. The output shaft extends into the first inner hole 22411, and the connecting screw 2242 passes through the second inner hole 22412 and is threadedly connected to the output shaft. The cutter head body 222 is fixed to the connecting sleeve 2241. The output shaft of the drive component 221 and the cutter head body 222 are fixedly connected to each other. Both the output shaft of the drive component 221 and the connecting sleeve 2241 are rotary structures. The connecting sleeve 2241 is a hollow structure, with its axial ends passing through the first inner hole 22411 and the second inner hole 22412, respectively. The inner diameters of the first inner hole 22411 and the second inner hole 22412 are different. When the output shaft extends into the first inner hole 22411, that end of the output shaft abuts against the shoulder at the connection between the first inner hole 22411 and the second inner hole 22412, thus axially limiting the output shaft. The end of the output shaft of the drive member 221 that extends into the first inner hole 22411 has a threaded hole. The connecting screw 2242 passes through the connecting sleeve 2241 and connects to the threaded hole. The head of the connecting screw 2242 presses the connecting sleeve 2241 and the output shaft of the drive member 221 together, thereby fixing the output shaft and the cutter head together.

[0070] By setting the coupling assembly 224, the output shaft of the drive component 221 and the cutter head body 222 can be fixed to each other, so that the rotation of the output shaft of the drive component 221 drives the rotation of the cutter head body 222.

[0071] In some embodiments, the tool holder 21 has a shaft hole 211, the drive member 221 is disposed inside the tool holder 21, and its output shaft passes through the shaft hole 211 to the outside of the tool holder 21. A support bearing is provided between the outer peripheral wall of the output shaft and the inner peripheral wall of the shaft hole 211, which can make the output shaft rotate more stably.

[0072] In some embodiments, there are multiple blades 223, which are fixed at the periphery of the blade body 222. The blades 223 are moved by the rotation of the blade body 222 to mow the lawn.

[0073] Please refer to some embodiments of this utility model. Figure 8 The outer peripheral wall of the connecting sleeve 2241 extends radially outward to form an annular boss 22413. The cutter head body 222 has a central hole through which the connecting sleeve 2241 passes. The annular boss 22413 is connected to the cutter head body 222 by a first screw. The annular boss 22413 and the cutter head body 222 are stacked in the axial direction. The cutter head body 222 has a first connecting hole 2221, and the annular boss 22413 has a second connecting hole 22414. The first screw passes through the first connecting hole 2221 and is threaded into the second connecting hole 22414, or the first screw passes through the second connecting hole 22414 and is threaded into the first connecting hole 2221.

[0074] By extending an annular boss 22413 on the outer peripheral wall of the connecting sleeve 2241, a fixed connection between the connecting sleeve 2241 and the cutter head body 222 is achieved, making installation and disassembly more convenient.

[0075] In some embodiments, the number of first screws is multiple and they are distributed circumferentially, which can make the connection between the connecting sleeve 2241 and the cutter head body 222 more stable.

[0076] In some embodiments, please refer to Figure 8 One side of the cutter head body 222 extends axially to form a limiting annular portion 2222, and an annular boss 22413 is disposed inside the limiting annular portion 2222. The limiting annular portion 2222 allows the annular boss 22413 to be installed and positioned, making it easier to align the first connecting hole 2221 and the second connecting hole 22414.

[0077] Please refer to some embodiments of this utility model. Figure 8A sliding plate seat 226 is fitted around the outer periphery of the connecting sleeve 2241. The sliding plate seat 226 and the sliding plate 225 are fixedly connected by a second screw. A rolling bearing 227 is provided between the inner peripheral wall of the sliding plate seat 226 and the outer peripheral wall of the connecting sleeve 2241. The connecting sleeve 2241 is fixedly connected to the cutter head body 222, and therefore rotates with the rotation of the cutter head body 222. The rolling bearing 227 ensures that the sliding plate seat 226 remains stationary when the connecting sleeve 2241 rotates. The sliding plate seat 226 and the sliding plate 225 are stacked in the axial direction and can be locked together by the second screw.

[0078] By providing a slide block seat 226 on the outer periphery of the connecting sleeve 2241 and a rolling bearing 227 between the slide block seat 226 and the cutter head body 222, the slide block seat 226 remains stationary when the cutter head body 222 rotates, thereby keeping the slide block 225 stationary and reducing the friction between the slide block 225 and the ground.

[0079] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lawnmower, characterized in that, include: The main unit has a front and a rear that are positioned relative to each other; A roller assembly is disposed at the bottom of the main unit, and the roller assembly is disposed between the front and rear of the main unit; as well as The cutting blade assembly includes a blade holder and multiple blade disc assemblies disposed on the blade holder, each of the blade disc assemblies being disposed at the front of the main unit.

2. The lawnmower as described in claim 1, characterized in that, The number of cutter head assemblies is three, and they are arranged along the lateral direction of the host, which is perpendicular to the forward direction of the host.

3. The lawnmower as described in claim 2, characterized in that, The three cutter head assemblies are arranged in a straight line.

4. The lawnmower as described in claim 2, characterized in that, The three cutter heads are arranged in a V-shape, with the middle cutter head assembly being closer to the rear of the main unit than the cutter head assemblies on either side.

5. The lawnmower as described in claim 4, characterized in that, The lawnmower also includes a caster assembly located at the bottom of the main unit, and the cutter head assembly in the middle is a central cutter head assembly, with the caster assembly located on the front side of the central cutter head assembly.

6. The lawnmower as described in claim 4, characterized in that: In the lateral direction, the trimming areas covered by two adjacent cutter head assemblies partially overlap.

7. The lawnmower as described in any one of claims 1-6, characterized in that: The cutter head assembly includes a drive unit fixed to the cutter holder, a cutter head body driven to rotate by the drive unit, a blade disposed on the cutter head body, and a slide plate coaxial with and spaced apart from the cutter head body. The side of the slide plate facing away from the cutter head body is intended to be positioned facing the ground.

8. The lawnmower as described in claim 7, characterized in that: The output shaft of the drive unit is connected to the cutter head body via a coupling assembly. The coupling assembly includes a connecting sleeve and a connecting screw. The connecting sleeve has a first inner hole and a second inner hole that are interconnected. The output shaft extends into the first inner hole, and the connecting screw passes through the second inner hole and is threadedly connected to the output shaft. The cutter head body is fixed to the connecting sleeve.

9. The lawnmower as described in claim 8, characterized in that: The outer peripheral wall of the connecting sleeve extends radially outward to form an annular boss. The cutter head body has a central hole through which the connecting sleeve passes. The annular boss is connected to the cutter head body by a first screw.

10. The lawnmower as described in claim 8, characterized in that: The outer periphery of the connecting sleeve is fitted with a sliding plate seat, and the sliding plate seat and the sliding plate are fixedly connected by a second screw. A rolling bearing is provided between the inner peripheral wall of the sliding plate seat and the outer peripheral wall of the connecting sleeve.

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