Mower disc assembly for a mower and a mower

Abstract

The present disclosure relates to a cutterhead assembly applied to a mower and a mower, the cutterhead assembly comprising a cutterhead, a blade, a mounting portion, a locking assembly and an operating portion, the locking assembly comprising a first locking portion formed on the mounting portion and a second locking portion matched with the first locking portion; the operating portion is connected with the second locking portion, and when an external force acts on the operating portion, the operating portion drives the second locking portion to move between a locking position and a release position; when the second locking portion is in the locking position, the first locking portion and the second locking portion are in a matched state to connect the blade to the cutterhead; when the second locking portion is in the release position, the first locking portion and the second locking portion are in a separated state to form a path for the blade to move at least in an axial direction of the cutterhead to separate the blade from the cutterhead, and the blade is moved at least in the axial direction of the cutterhead to be disassembled or assembled, the disassembly and assembly method does not need to use other auxiliary tools, is simple to operate, effectively avoids the loss of parts, improves the replacement efficiency, does not need to open a disassembly channel communicated with a through hole on the blade, can effectively prevent the blade from being thrown out by centrifugal force, is compatible with old blades on the market, and does not need to change the operation habit of users for disassembly and assembly.

Description

[0001] This application claims priority to Chinese patent application CN202422945810.6, filed on November 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of lawnmower technology, specifically to a blade assembly for use in lawnmowers and a lawnmower. Background Technology

[0003] Today, power tools such as lawnmowers and leaf blowers are widely used in industry, construction, landscaping, household chores, and around homes, bringing great convenience to people's work and life. With modern life placing increasing emphasis on greenery and the proliferation of lawns, lawnmowers have become an indispensable tool for trimming and maintaining lawns.

[0004] Lawn mowers typically mount rotary blades on a blade disc, which drives the disc to rotate at high speed, causing the blades to rotate and cut grass efficiently. However, when the blades have been used for a period of time or become damaged, the mowing effect will be poor, and the blades will need to be replaced.

[0005] In existing technology, blades are usually fixed to the blade disc with bolts. When it is necessary to replace the blade, auxiliary tools such as screwdrivers are needed to unscrew the bolts before the old blade can be removed. After installing the new blade, auxiliary tools are also needed to tighten the bolts. This method makes the blade disassembly and assembly work highly dependent on auxiliary tools and complicated to operate. Utility Model Content

[0006] The purpose of this disclosure is to provide a blade assembly and lawnmower that are easy to operate and allow for blade replacement without the need for auxiliary tools.

[0007] To achieve the above-mentioned objectives, this disclosure provides a blade assembly for a lawnmower, comprising:

[0008] Cutter head;

[0009] The blade is detachably mounted on the cutter head, and the blade has a through hole;

[0010] A mounting part is provided on the cutter head and is used to limit the blade to be located on the cutter head in the radial direction of the cutter head;

[0011] The locking assembly includes a first locking portion formed on the mounting portion and a second locking portion that engages with the first locking portion;

[0012] An operating part is connected to the second locking part. When an external force is applied to the operating part, the operating part drives the second locking part to move between a locked position and a released position.

[0013] When the second locking part is in the locked position, the first locking part and the second locking part are engaged to connect the blade to the cutter head;

[0014] When the second locking part is in the released position, the first locking part and the second locking part are in a separated state, forming a path for the blade to move at least along the axial direction of the cutter head to separate the blade from the cutter head.

[0015] As a further improvement of this disclosure, when the second locking part is in the locked position, the sum of the cross-sections of the first locking part and the second locking part along the plane parallel to the blade is at least partially greater than the size of the through hole; when the second locking part is in the released position, the size of the cross-section of the path along the direction of movement perpendicular to the blade is less than or equal to the size of the through hole.

[0016] As a further improvement of this disclosure, the cross-sectional dimension of the path along the axial direction perpendicular to the cutter head is less than or equal to the dimension of the through hole.

[0017] As a further improvement of this disclosure, the operating part is configured to move along the axial direction of the cutter head when subjected to a force at least along the axial direction of the cutter head, thereby causing the second locking part to move between the locked position and the released position.

[0018] As a further improvement of this disclosure, the cutter head is provided with a through hole extending along the axial direction of the cutter head, at least a portion of the through hole is formed on the mounting portion, the operating portion is at least partially movably disposed in the through hole, the second locking portion is connected to the end of the operating portion near the mounting portion, the opening size of the through hole is smaller than the cross-sectional size of the second locking portion along the surface where the opening is located, and the opening is formed at the end of the through hole near the mounting portion.

[0019] As a further improvement of this disclosure, the thickness of the side of the mounting portion located near the rotation axis of the cutter head is greater than or equal to the thickness of the side of the mounting portion located away from the rotation axis of the cutter head.

[0020] As a further improvement of this disclosure, the second locking portion is offset relative to the mounting portion, the mounting portion having a first side portion and a second side portion, the first side portion being away from the direction in which the second locking portion is offset relative to the mounting portion, the second side portion being close to the direction in which the second locking portion is offset relative to the mounting portion, and the height of the first side portion being greater than the height of the second side portion.

[0021] As a further improvement of this disclosure, the first side is provided with a first guide surface, and the second locking part is provided with a second guide surface on the side near the second side. From the direction of the operating part toward the location of the second locking part, the first guide surface and the second guide surface are inclined toward the second side.

[0022] As a further improvement of this disclosure, the cutter head assembly further includes a reset member connected to the operating part. When an external force is applied to the operating part, the operating part moves between a first position and a second position. When the operating part is in the first position, the second locking part is in the locked position. When the operating part is in the second position, the second locking part is in the released position. When the operating part moves from the first position to the second position, the reset member applies a force to the operating part at least toward the first position.

[0023] This disclosure also provides a lawnmower, comprising:

[0024] body;

[0025] A movable component, disposed on the machine body, supports and drives the machine body to move within the working area;

[0026] The cutter head assembly is located at the bottom of the machine body and rotates around its own axis under the driving action;

[0027] The cutter head assembly is the cutter head assembly described above.

[0028] The beneficial effects of this disclosure are: the locking component of the blade assembly applied to a lawnmower forms a path for the blade to move under external force, allowing the blade to move at least along the axial direction of the blade for disassembly or installation. This disassembly and installation method does not require the use of other auxiliary tools, is simple to operate, and eliminates the need to remove parts of the locking component from the blade, effectively preventing component loss and improving replacement efficiency. Furthermore, it eliminates the need to create a disassembly channel communicating with the through hole on the blade, effectively preventing the blade from being thrown out by centrifugal force and ensuring compatibility with older blades on the market. It also does not require changing the user's disassembly and installation habits. Installing this blade assembly on a lawnmower improves the user experience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a cutter head assembly according to an embodiment of the present disclosure.

[0030] Figure 2 for Figure 1 The diagram shows a structure in which the blade is mounted on the cutter head.

[0031] Figure 3 for Figure 1The diagram shows another structural schematic of the blade mounted on the cutter head.

[0032] Figure 4 for Figure 1 The diagram shows a blade mounted on a tilted cutter head.

[0033] Figure 5 for Figure 1 The diagram shows another structure in which the blade is mounted on the cutter head and tilted.

[0034] Figure 6 for Figure 1 The diagram shows the locking element in the released position.

[0035] Figure 7 for Figure 1 Another structural diagram showing the locking element in the released position.

[0036] Figure 8 for Figure 1 This is another structural diagram showing the locking element in the released position.

[0037] Figure 9 for Figure 1 The diagram shows another structural schematic of the locking element in the released position.

[0038] Figure 10 This is a schematic diagram of the cutter head assembly according to another embodiment of the present disclosure.

[0039] Figure 11 for Figure 10 The diagram shows the locking element in the locked position.

[0040] Figure 12 for Figure 10 The diagram shows the locking element in the released position.

[0041] Figure 13 This is a schematic diagram of the structure of a cutter head assembly according to another embodiment of this disclosure.

[0042] Figure 14 for Figure 13 The diagram shows the locking element in the locked position.

[0043] Figure 15 for Figure 13 The diagram shows the locking element in the released position.

[0044] Figure 16 This is a schematic diagram of the structure of a lawnmower according to an embodiment of the present disclosure.

[0045] Among them, the cutter head assembly-100;

[0046] Cutter head-1, through hole-11;

[0047] Blade-2, Through Hole-21;

[0048] Mounting part -31, first side part -311, second side part -312, first guide surface -313;

[0049] Operation section-32, operation surface-321;

[0050] Reset component-33;

[0051] Fixing part -34, first fixing part -341, second fixing part -342;

[0052] Pressing part-35, first seal-36, dust cover-37, second seal-38;

[0053] Locking component-4, first locking part-41, third guide surface-411, second locking part-42, second guide surface-421, fourth guide surface-422;

[0054] Shaft-51, elastic element-52;

[0055] Lawn mower-200, body-6, moving device-7, drive wheels-71. Detailed Implementation

[0056] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.

[0057] In the description of this disclosure, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure.

[0058] Furthermore, where the terms "first" and "second" appear, these terms are 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 at least one of that feature. In the description of this disclosure, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0060] In this disclosure, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this disclosure are for illustrative purposes only and do not represent the only possible implementation.

[0062] Please see Figures 1 to 3 , Figure 6An embodiment of the present disclosure shows a blade assembly 100 for a lawnmower, including a blade 1, a blade 2 detachably mounted on the blade 1, and a mounting portion 31 provided on the blade 1. The mounting portion 31 is used to limit the blade 2 to be located on the blade 1 in the radial direction. The blade 2 has a through hole 21, and the blade 2 is sleeved on the mounting portion 31 through the through hole 21 to achieve the limitation of being located on the blade 1 in the radial direction.

[0063] The cutter head assembly 100 also includes a locking assembly 4, which is used to limit the blade 2 at least along the axial direction of the cutter head 1 to the cutter head 1. The locking assembly 4 includes a first locking part 41 formed on the mounting part 31 and a second locking part 42 that cooperates with the first locking part 41. When the second locking part 42 is in the locked position, the first locking part 41 and the second locking part 42 are in a cooperating state to connect the blade 2 to the cutter head 2; when the second locking part 42 is in the released position, the first locking part 41 and the second locking part 42 are in a disengaged state, forming a path for the blade 2 to move at least along the axial direction of the cutter head 1 to separate the blade 2 from the cutter head 1.

[0064] The cutter head assembly 100 also includes an operating part 32 connected to the second locking part 42. When an external force is applied to the operating part 32, the operating part 32 drives the second locking part 42 to move between a locked position and a released position. When the second locking part 42 is in the locked position, such as Figure 2 and Figure 3 As shown, the locking component 4 limits the blade 2 to the cutter head 1, and the blade 2 and the cutter head 1 rotate synchronously when the cutter head assembly 100 is performing cutting operations. When the second locking part 42 is in the released position, as... Figure 6 As shown, the through hole 21 of the blade 2 allows for removal from or installation onto the cutter head 1 via a path, enabling blade 2 replacement. The locking component 4 of the cutter head assembly 100 forms a path for the blade 2 to move under external force. The blade 2 can be removed or installed at least along the axial direction of the cutter head 1. This removal and installation method requires no additional tools, is simple to operate, and eliminates the need to remove at least part of the locking component 4 from the cutter head 1, effectively preventing structural loss and improving replacement efficiency. Furthermore, it eliminates the need for a removal channel communicating with the through hole 21 on the blade 2, effectively preventing the blade 2 from being thrown out by centrifugal force and ensuring compatibility with older blades on the market. It also eliminates the need to change the user's removal and installation habits. It should be noted that the axial direction of the cutter head 1 is as follows... Figure 2 As shown in direction a, the radial direction of the cutter head 1 is as follows: Figure 2 The direction b is shown in the middle.

[0065] To ensure the cutting efficiency of the cutter head assembly 100, multiple blades 2 are provided. These multiple blades 2 can be arranged within a single cutting plane, or within two or more cutting planes at different cutting heights. The cutting plane is either the upper or lower surface of the cutter head 1. The number of cutting planes provided in the cutter head assembly 100 is not specifically limited here; that is, the cutter head assembly 100 can have a single layer of blades 2 or multiple layers of blades 2. When the number of cutting planes is at least two, the distance between two adjacent cutting planes is not specifically limited here, and the two adjacent cutting planes can be the upper and lower surfaces of the cutter head 1, respectively. Alternatively, the cutter head 1 includes at least two mounting bodies arranged separately along the axial direction of the cutter head 1, each mounting body having a cutting plane.

[0066] In this embodiment, multiple blades 2 are distributed in two cutting planes at different heights. At least two blades 2 are arranged in each cutting plane, and the blades 2 are evenly distributed circumferentially along the cutter head 1 to ensure the balance of the cutter head assembly 100 during operation. Three blades 2 are evenly distributed circumferentially along the cutter head 1 in both cutting planes. The number of blades 2 in each cutting plane can be the same or different, and is not limited to three; it can be two, four, or more. However, to achieve balanced cutting and improve efficiency, each blade 2 must be evenly distributed circumferentially along the cutter head 1. The specifications of the multiple blades 2 in both cutting planes are the same, which helps ensure the versatility of the blades 2 and can more effectively reduce costs. Furthermore, the projections of the multiple blades 2 in a plane perpendicular to the rotation axis of the cutter head 1 do not coincide; that is, the multiple blades 2 are staggered and spaced apart along the cutter head 1. This arrangement allows the cutter head assembly 100 to achieve sequential cutting of grass during operation. The blade 2 is a long strip blade 2, which includes at least one straight cutting edge. In this embodiment, the blade 2 has two straight cutting edges. When the cutting edge on one side is damaged after working for a period of time, the cutting edge on the other side can be replaced. This can reduce the frequency of replacing the blade 2 and save costs.

[0067] In this embodiment, the through hole 21 on the blade 2 is a round hole. The blade 2 is pivotally connected to the mounting part 31. That is, when the blade 2 is installed on the cutter head 1, the blade 2 can rotate freely around the mounting part 31. This allows the blade 2 to rotate and avoid obstacles encountered during the cutting process, reducing damage to the blade 2 and improving its service life. At the same time, when the cutter head assembly 100 is not in use, the blade 2 can rotate under force when the user touches it, effectively reducing the injury to the user.

[0068] Please see Figures 2 to 5The mounting part 31 protrudes from the cutting plane on the cutter head 1 in a direction away from the cutter head 1 to facilitate the installation of the blade 2. When the blade 2 is installed on the cutter head 1, it is fitted onto the mounting part 31. Along the axial direction perpendicular to the cutter head 1, the cross-sectional dimension of the mounting part 31 is smaller than the dimension of the through hole 21. To accommodate the through hole 21 of the blade 2, the mounting part 31 has a cylindrical structure with a diameter that matches the through hole 21; the diameter of the cylinder is less than or equal to the diameter of the through hole 21. Optionally, the diameter of the mounting part 31 is smaller than the diameter of the through hole 21 to ensure smooth disassembly or installation of the blade 2. Simultaneously, when the blade 2 is installed on the cutter head 1, it can rotate freely around the mounting part 31, allowing the blade 2 to rotate and avoid obstacles encountered during cutting, reducing damage to the blade 2 and increasing its service life. In other embodiments, the mounting part may take other forms, such as a semi-cylindrical structure for the mounting part and a semi-cylindrical structure for the operating part, and the mounting part and the operating part may be combined to form a cylindrical structure.

[0069] Optionally, to ensure the stability of the mounting part 31 on the cutter head 1, the connection method between the mounting part 31 and the cutter head 1 is not specifically limited, as long as it can achieve relative fixation between the mounting part 31 and the cutter head 1. The mounting part 31 can be integrally formed with the cutter head 1 to improve the strength and service life of the cutter head assembly 100. The mounting part 31 can also be fixed to the cutter head 1 by other components. Specifically, the cutter head assembly 100 also includes a fixing part 34 connected to the mounting part 31. The fixing part 34 is integrally formed with the mounting part 31 and is installed inside the cutter head 1. The mounting part 31 is fixed on the cutter head 1 by the interference fit between the fixing part 34 and the cutter head 1.

[0070] Please see Figure 2 and Figure 3 When the blade 2 is mounted on the cutter head 1, it is fitted onto the mounting portion 31, and the height of the mounting portion 31 is greater than the thickness of the blade 2. The blade 2 can move up and down along the axial direction of the cutter head 1 on the mounting portion 31, thereby reducing the impact on the blade 2 to a certain extent and preventing damage caused by direct impact with hard obstacles. It also reduces vibration of the blade 2 during operation. In other embodiments, the height of the mounting portion 31 can be the same as the thickness of the blade 2, so that the blade 2 cannot move up and down along the axial direction of the cutter head 1 on the mounting portion 31, but can only rotate around the mounting portion 31. The height of the mounting portion 31 is not specifically limited here; it can be set according to actual needs.

[0071] Please see Figure 4 and Figure 5 Because the height of the mounting part 31 is greater than the thickness of the blade 2, when the diameter of the through hole 21 is greater than the diameter of the mounting part 31, the blade 2 can swing around the mounting part 31, further reducing the damage to the blade 2.

[0072] When the second locking part 42 is in the locked position, the sum of the cross-sections of the first locking part 41 and the second locking part 42 along the plane parallel to the blade 2 is at least partially larger than the size of the through hole 21; when the second locking part 42 is in the released position, the size of the cross-section of the path perpendicular to the moving direction of the blade 2 is less than or equal to the size of the through hole 21. Under the action of external force, the operating part 32 drives the second locking part 42 to move between the locked position and the released position to change the size of the cross-section of the locking assembly 4, thereby enabling the blade 2 to be connected to, removed from or installed on the cutter head 1.

[0073] Specifically, the first locking part 41 is formed at the end of the mounting part 31 away from the cutter head 1, and the first locking part 41 and the mounting part 31 are integrally formed. The second locking part 42 is provided on the side of the mounting part 31 away from the cutter head, that is, the second locking part 42 and the cutter head 1 are provided opposite to each other on both sides of the mounting part 31. When the second locking part 42 is in the locked position, the first locking part 41 and the second locking part 42 at least partially abut against each other, and the size of their cross-sections along the plane parallel to the blade 2 is larger than the size of the through hole 21. The blade 2 cannot pass through the first locking part 41 and the second locking part 42, which are larger than the size of the through hole 21, thereby limiting the blade 2 between the mounting parts 31.

[0074] Please see Figures 6 to 9 When the second locking part 42 is in the released position, it moves away from the first locking part 41. The cross-sectional dimensions of the first locking part 41 and the second locking part 43 are smaller than the dimensions of the through hole 21, forming a path with a cross-sectional area smaller than that of the through hole 21. Under external force, the blade 2 moves on the mounting part 31 and onto the locking assembly 4, continuing to move until it disengages from the locking assembly 4, thus removing it from the cutter head 1. Similarly, the blade 2 first passes through the locking assembly 4 and then is fitted onto the mounting part 31 for installation. In other words, the blade 2 can move at least along the axial direction of the cutter head 1 for removal or installation. Compared to the radial removal and installation in the prior art, this disclosure does not change the user's operating habits and is compatible with the blade 2. It eliminates the need to create a groove on the blade 2 that communicates with the through hole 21, ensuring the strength of the blade 2 and avoiding a reduction in strength due to grooves in the blade 2. Meanwhile, the disassembly direction of the slotted blade 2 is the same as the direction of movement under centrifugal force, making it easier to be thrown out and posing a high risk. However, the blade 2 disclosed herein is not easily thrown out under centrifugal force during operation, thus improving the safety performance of the cutter head assembly 100.

[0075] The path can extend entirely along the axial direction of the cutter head 1, such as... Figure 12 or Figure 15As shown, at this time, the user only needs to apply force to the blade 2 to move it away from the cutter head 1 to disassemble it, or move it towards the cutter head 1 to fit it onto the mounting part 31. The path can extend partially along the axial direction of the cutter head 1, such as... Figures 6 to 9 As shown, when the user moves the blade 2 away from the cutter head 1, it also needs to move the blade 2 a certain distance within the plane of the cutting surface. This means the path has a bend. The specific structure of the path is not specifically limited here; it only needs to have a cross-sectional dimension less than or equal to the dimension of the through hole 21, allowing the blade 2 to move along the path. It should be noted that the cross-section of the path is the section of the plane containing the blade 2 when it reaches a certain position.

[0076] In one embodiment, the cross-sectional dimension of the path along the axial direction perpendicular to the cutter head 1 is smaller than the dimension of the through hole 21. For details, please refer to [link to specific examples]. Figure 6 The dimensions of the cross-section of the path parallel to the cutting plane are all smaller than the dimensions of the through hole 21. In other words, the blade 2 can pass through the path for disassembly or installation without swinging to a specific angle, which facilitates user operation, reduces the time for users to replace the blade 2, and ensures the success rate of blade 2 disassembly or installation.

[0077] In one embodiment, the operating part 32 is configured to move along the axial direction of the cutter head 1 when subjected to a force at least along the axial direction of the cutter head 1, thereby driving the second locking part 42 to move between a locked position and a released position. Optionally, the second locking part 42 can move up and down along the axial direction of the cutter head 1 to achieve movement between the locked position and the released position. This movement method facilitates the cooperation between the second locking part 42 and other components such as the mounting part 41, and also improves the sealing performance of the locking assembly 4, preventing grass clippings from entering the vicinity of the second locking part 42 and affecting its movement. This will be explained in more detail later. In other embodiments, the second locking part can move up and down along the axial direction of the cutter head while simultaneously moving or rotating along the plane containing the cutting plane; this is not specifically limited here.

[0078] Please see Figures 4 to 9The cutter head 1 has a through hole 11 extending along the axial direction of the cutter head 1, and at least a portion of the through hole 11 is formed on the mounting portion 31. As described above, the mounting portion 31 and the fixing portion 34 are integrally formed and mounted on the cutter head 1, with a portion of the through hole 11 formed on the mounting portion 31 and another portion formed on the fixing portion 34. The operating portion 32 is at least partially movably disposed within the through hole 11, and the second locking portion 42 is connected to the end of the operating portion 32 near the mounting portion 31. The opening size of the through hole 11 is smaller than the cross-sectional size of the second locking portion 42 along the opening surface, and the opening is formed at the end of the through hole 11 near the mounting portion 31. That is, the second locking portion 42 is disposed outside the through hole 11 and cannot enter the through hole 11. Along the axial direction perpendicular to the cutter head 1, the cross-sectional size of the operating portion 32 and the second locking portion 42 is smaller than the size of the through hole 21 to ensure the smooth movement of the blade 2 through both. Optionally, the second locking part 42 and the operating part 32 are integrally formed to improve the service life of the cutter head assembly 100.

[0079] The operating part 32 moves within the through hole 11. When an external force is applied to the operating part 32, the operating part 32 moves between a first position and a second position. When the operating part 32 is in the first position, the second locking part 42 is in the locked position and the second locking part 42 is in contact with the first locking part 41. When the operating part 32 is in the second position, the second locking part 42 is in the released position and the second locking part 42 is separated from the first locking part 41.

[0080] When the operating part 32 and the second locking part 42 move downwards synchronously until the second locking part 42 abuts against the first locking part 41 on the mounting part 31, because the size of the second locking part 42 is larger than the size of the through hole 11 formed on the mounting part 31, the operating part 32 and the second locking part 42 cannot continue to move downwards, and the second locking part 42 is in the locked position. In this embodiment, the axis of the second locking part 42 is offset relative to the axis of the mounting part 31. When the second locking part 42 and the first locking part 41 abut against each other, although the cross-sectional size of the first locking part 41 is smaller than the size of the through hole 21 of the blade 2, and the cross-sectional size of the second locking part 42 is smaller than the size of the through hole 21 of the blade 2, the first locking part 41 and the second locking part 42 are misaligned so that the sum of the cross-sectional sizes of the second locking part 42 and the first locking part 41 is greater than the size of the through hole 21. The blade 2 cannot pass through the locking assembly 1 to disengage from the cutter head 1, so that the blade 2 can be mounted on the cutter head 1. The degree of offset between the second locking part 42 and the mounting part 31 is not specifically limited here, as long as it ensures that the first locking part 41 and the second locking part 42 forming the contact cannot be penetrated by the blade 2. It should be noted that the direction in which the blade 2 is mounted on the surface of the cutter head 1 is upward, and the direction in which the opposite surface of the cutter head 1 is downward, for example... Figure 2In the middle, the direction above the blade 2 on the left and the direction above the blade 2 on the right are completely opposite.

[0081] When the operating part 32 and the second locking part 42 move upward synchronously, the second locking part 42 moves away from the mounting part 31 and the first locking part 41, and the second locking part 42 is in the released position. Since the cross-sectional dimensions of the second locking part 42, the operating part 32 and the mounting part 31 are all smaller than the through hole 21, the blade 2 can be removed from the cutter head 1 after passing through the mounting part 31, the operating part 32 and the second locking part 42 in sequence. The blade 2 can be installed on the cutter head 1 after passing through the second locking part 42, the operating part 32 and the mounting part 31 in sequence.

[0082] The thickness of the side of the mounting portion 31 closest to the rotation axis of the cutter head 1 is greater than or equal to the thickness of the side of the mounting portion 31 furthest from the rotation axis of the cutter head 1. As described above, the mounting portion 31 has a hollow structure with a through hole 11 inside. The thickness of the mounting portion 31 is its wall thickness. The side of the mounting portion 31 closest to the rotation axis of the cutter head 1 is the inner side, and the side of the mounting portion 31 furthest from the rotation axis of the cutter head 1 is the outer side. Optionally, the thickness of the inner side of the mounting portion 31 is greater than the thickness of its outer side. During operation of the cutter head assembly 100, the blade 2 is subjected to the centrifugal force of the rotating cutter head 1, causing the blade 2 to continuously rub against the inner side of the mounting portion 31. In this embodiment, increasing the thickness of the inner side of the mounting portion 31 increases its friction resistance and improves its service life. In one embodiment, offsetting the axis of the through hole 11 outwards achieves a wall thickness greater than that of the outer side of the mounting portion 31.

[0083] The mounting portion 31 has a first side portion 311 and a second side portion 312. The first side portion 311 is located away from the second locking portion 42 in a direction offset relative to the mounting portion 31, while the second side portion 312 is located close to the second locking portion 42 in a direction offset relative to the mounting portion 31. The height of the first side portion 311 is greater than the height of the second side portion 312, thereby preventing the blade 2 from being removed. Please refer to [link / reference]. Figure 4 and Figure 5 When the blade 2 is mounted on the cutter head 1, it will swing around the mounting part 31. If the height of the first side part 311 of the mounting part 31 is low, when the blade 2 swings around the mounting part 31, it will swing around the mounting part 31. Figure 5As shown, if the blade 2 swings, there is a risk of it coming off. This application increases the height of the first side portion 311 of the mounting portion 31 so that the blade 2 cannot come off the locking assembly 4 regardless of how it swings. In this embodiment, the second locking portion 42 is offset outward relative to the mounting portion 31, so the first side portion 311 is located inside the mounting portion 31, and the second side portion 312 is located outside the mounting portion 31. To connect the first side portion 311 and the second side portion 312, the upper end of the first locking portion 41 is an inclined surface, and the bottom surface of the second locking portion 42 facing the first locking portion 41 is also an inclined surface. This ensures a sealed fit between the second locking portion 42 and the first locking portion 41 when the second locking portion 42 is in the locked position, guaranteeing the stability of the blade 2's installation on the cutter head 1 and preventing the blade 2 from coming off due to a large distance between the second locking portion 42 and the first locking portion 41.

[0084] The first side portion 311 of the mounting portion 31 is provided with a first guide surface 313, and the second locking portion 42 is provided with a second guide surface 421 on the side near the second side portion 312. From the direction of the operating portion 32 toward the location of the second locking portion 42, the first guide surface 313 and the second guide surface 421 are inclined toward the second side portion 312. Specifically, the first guide surface 313 is inclined toward the direction of the second locking portion 42, and the inclination direction of the second guide surface 421 is the same as the inclination direction of the first guide surface 313. Please refer to [link / reference]. Figures 6 to 9 When the second locking part 42 is in the released position, the user moves the blade 2 upward from the mounting part 31 until... Figure 7 At the indicated position, as the blade 2 moves upward, it needs to translate horizontally towards the direction of the second locking part 42 to pass through it. The first guide surface 313 and the second guide surface 421 ensure the smooth translation of the blade 2, thereby facilitating the disassembly and removal of the blade 2 along the path. Similarly, during the installation of the blade 2, the blade 2 first moves to... Figure 9 At the position shown, the blade 2 needs to move downwards while simultaneously translating horizontally toward the mounting part 31 to pass through the mounting part 31. The first guide surface 313 and the second guide surface 421 guide the blade 2 toward the mounting part 31.

[0085] To drive the operating part 32 to move between a first position and a second position, the operating part 32 is provided with an operating surface 321 for external force application. The operating surface 321 is formed at the end of the operating part 32 away from the second locking part 42. When external force is applied to the operating surface 321, the operating part 32 moves within the through hole 11. To improve user comfort when operating the operating part 32, a pressing part 35 is fitted onto the end of the operating part 32 away from the second locking part 42. The size of the pressing part 35 is larger than the size of the operating part 32, and the operating surface 321 is also formed on the pressing part 35 to increase the area of ​​the operating surface 321. To reduce the difficulty of pressing the operating surface 321, when the operating part 32 is in the first position, the end of the operating part 32 away from the second locking part 42 protrudes out of the through hole 11. When the operating part 32 is driven to move to the second position, the operating surface 321 is flush with the lower surface of the cutter head 1, making it easier for the user to drive the operating part 32 from the first position to the second position.

[0086] To accommodate the pressing part 35, the fixing part 34 includes a first fixing part 341 connected to the mounting part 31 and a second fixing part 342 connected to the first fixing part 341. The diameter of the through hole 11 formed on the first fixing part 341 is the same as the diameter of the through hole 11 formed on the mounting part 31, and the diameter of the through hole 11 formed on the mounting part 31 is smaller than the diameter of the through hole 11 formed on the second fixing part 342. The diameter of the pressing part 35 and the inner diameter of the second fixing part 342 are matched, which effectively reduces the amount of grass clippings entering between the pressing part 35 and the fixing part 34 and ensures the stability of the pressing part 35 and the operating part 32 moving up and down along the axial direction of the cutter head 1.

[0087] It should be noted that in this embodiment, the cross-sections of the through hole 11, the operating part 32, and the pressing part 35 along the axial direction perpendicular to the cutter head 1 are all circular. In other embodiments, the cross-sections of the through hole 11, the operating part 32, and the pressing part 35 along the axial direction perpendicular to the cutter head 1 may also be other shapes, such as square.

[0088] In this embodiment, when the operating part 32 is in the first position, the pressing part 35 is at least partially located within the second fixing part 342. Under the action of external force, the pressing part 35 moves up and down within the through hole 11 along the extension direction of the through hole 11, ensuring the smooth movement of the operating part 32 and the second locking part 42 between the locked position and the released position. The pressing part 35 can be installed on the operating part 32 by interference fit, simplifying the manufacturing process of the pressing part 35 and the operating part 32. The pressing part 35 and the operating part 32 can also be integrally molded, increasing the connection strength and service life. The connection method between the pressing part 35 and the operating part 32 can be set according to actual needs.

[0089] Because the pressing part 35 moves up and down along the extension direction of the through hole 11 within the through hole 11, the outer circumferential dimension of the pressing part 35 is smaller than the inner circumferential dimension of the through hole 11 to ensure the smooth movement of the pressing part 35. When the cutter head assembly 100 is performing cutting operations, grass clippings may enter between the pressing part 35 and the fixing part 34 through the gap, affecting the smoothness of the up-and-down movement of the operating part 32. In this embodiment, a first sealing member 36 is provided between the pressing part 35 and the fixing part 34. This first sealing member 36 can be a sealing ring or other structure capable of achieving a seal. A concave ring is provided on one of the pressing part 35 and the fixing part 34, and the first sealing member 36 is disposed within this concave ring.

[0090] The cutter head assembly 100 also includes a reset member 33 connected to the operating part 32. When the operating part 32 moves from the first position to the second position, the reset member 33 applies a force to the operating part 32 at least toward the first position. That is, when the second locking part 42 moves from the locked position to the released position, the reset member 33 stores force to drive the second locking part 42 to reset the locked position. The reset member 33 is configured to apply a force to the second locking part 42 to keep it in the locked position. Without external force, the reset member 33 drives the second locking part 42 to be in the locked position, and the second locking part 42 abuts against the mounting part 31 to ensure the installation stability of the blade 2 on the cutter head 1. The reset member 33 is sleeved on the operating part 32 and received in the through hole 11, and is located between the pressing part 35 and the first fixing part 341. The reset member 33 is an elastic structure such as a spring or a spring sheet.

[0091] When an external force is applied to the operating part 32, the operating part 32 drives the second locking part 42 to move between a locked position and a released position. In this embodiment, the second locking part 42 is configured to move along the axial direction of the cutter head 1 to move between the locked position and the released position. That is, the operating part 32 matches the through hole 11 formed on the mounting part 31 and the first fixing part 341. The through hole 11 extends along the axial direction of the cutter head 1. Under the action of an external force, the operating part 32 moves within the through hole 11 along the axial direction of the cutter head 1 to improve the sealing between the operating part 32 and the through hole 11, effectively preventing grass clippings from entering between the operating part 32 and the mounting part 31 during the cutting operation of the cutter head assembly 100, and ensuring the smooth movement of the second locking part 42 between the locked position and the released position. Optionally, a third seal (not shown) may be provided between the operating part 32 and the mounting part 31 to increase the sealing between them. The third seal may be a sealing ring or other structure capable of achieving a seal. One of the operating part 32 and the mounting part 31 is provided with a concave ring, and the third seal can be placed inside the concave ring.

[0092] Please see Figure 3A removable dust cover 37 can be installed above the locking assembly 4 to further reduce the probability of dust, grass clippings, etc., entering the interior of the locking assembly 4, thereby improving the service life of the locking assembly 4. Simultaneously, the dust cover 37 further prevents the blade 2 from detaching from the locking assembly 4, increasing the stability of the blade 2 mounted on the cutter head 1. When replacing the blade 2, first remove the dust cover 37, then disassemble the blade 2. After the new blade 2 is installed on the mounting part 31, the dust cover 37 can be reinstalled. The installation method of the dust cover 37 is not specifically limited here; it can be selected according to actual needs.

[0093] In this embodiment, the specific process of disassembling the blade 2 is as follows: Please refer to... Figure 6 When the user's hand operates on the operating surface 321, the operating part 32 moves the second locking part 42 upward to the release position, separating the first locking part 41 and the second locking part 42. A path is formed between the mounting part 31, the first locking part 41, the operating part 32, and the second locking part 42. (See also...) Figure 7 and Figure 8 The user's other hand acts on the blade 2, moving it upwards. Under the action of the first guide surface 313 and the second guide surface 421, the blade 2 moves upwards while simultaneously translating on the plane where the cutting plane is located, thus disengaging the blade 2 from the mounting part 31; see also Figure 9 Continue to move the blade 2 upwards, and after the blade 2 passes through the operating part 32 and the second locking part 42, it is removed from the blade 2.

[0094] The specific installation process for Blade 2 is as follows: Please refer to [link / reference]. Figure 9 When the user's one hand operates on the operating surface 321, the operating part 32 moves the second locking part 42 upward to the release position, separating the first locking part 41 and the second locking part 42. The mounting part 31, the first locking part 41, the operating part 32, and the second locking part 42 form a path. The user's other hand operates on the blade 2, pushing the blade 2 through the second locking part 42 and moving it downward. (See also...) Figure 7 and Figure 8 Under the action of the first guide surface 313 and the second guide surface 421, the blade 2 moves downward and translates on the plane where the cutting plane is located. After passing through the second locking part 42, the blade 2 moves towards the mounting part 31 and passes through the mounting part 31; see also Figure 6 As the blade 2 continues to move downwards, it is fitted onto the mounting part 31. After the external force acting on the operating part 32 is removed, the second locking part 42 is reset to its original position under the action of the reset member 33. Figure 4 or Figure 5 The locking state shown indicates that the blade 2 is installed.

[0095] Please see Figures 10 to 12In one embodiment, when the second locking part 42 is in the locked position, the second locking part 42 and the first locking part 41 are misaligned, meaning that the axis of the second locking part 42 and the axis of the first locking part 41 do not overlap. This is so that, along a plane parallel to the blade 2, at least a portion of the cross-sectional dimensions of the second locking part 42 and the first locking part 41 are larger than the size of the through hole 21, so that the blade 2 can be mounted on the cutter head 1. See also... Figure 12 When the second locking part 42 is in the released position, the second locking part 42 and the first locking part 41 are coaxially arranged, that is, the axis of the second locking part 42 and the axis of the first locking part 41 overlap to form a path through which the blade 2 can pass, and the blade 2 can be disassembled or installed.

[0096] In this embodiment, the size of the through hole 11 is larger than the size of the operating part 32 along the axial direction perpendicular to the cutter head 1. The operating part 32 can move laterally within the through hole 11, wherein the lateral movement is along a plane parallel to the cutting plane, that is, on a horizontal plane. When the second locking part 42 is in the locked position, the operating part 32 is close to the second side 312 of the mounting part 31, and one end of the second locking part 42 protrudes from the second side 312 of the mounting part 31 on the horizontal plane to increase the cross-sectional size of the locking assembly 4. When the second locking part 42 is in the released position, the operating part 32 is close to the first side 311 of the mounting part 31.

[0097] The pressing part 35 is connected to the end of the operating part 32 away from the second locking part 42. The end of the pressing part 35 away from the operating part 32 is rotatably mounted on the cutter head 1 via a rotating shaft 51. When an external force is applied to the pressing part 35, the operating part 32 rotates around the rotating shaft 51, and the pressing part 35 drives the operating part 32 and the second locking part 42 to move toward the direction of the first side part 311. After the external force is removed, the pressing part 35 returns to its original position under the action of the elastic member 52 disposed between the operating part 32 and the cutter head 1, and the second locking part 42 is in the locked position. In this embodiment, the second locking part 42 moves laterally under the action of an external force, from being misaligned with the mounting part 31 to being coaxially aligned with the mounting part 31, forming a path for the blade 2 to pass through, thereby realizing the removal or installation of the blade 2. After the external force is removed, the second locking part 42 returns to the locked position misaligned with the first locking part 41, connecting the blade 2 to the cutter head 1.

[0098] In this embodiment, the pressing part 35 is at least partially disposed on the side of the cutter head 1. The user applies force to the pressing part 35 from the side of the cutter head 1 to drive the second locking part 42 to move between the locked position and the released position. Even though the cutter head assembly 3 has multiple blades, this structure also facilitates user operation.

[0099] The height of the first side portion 311 of the mounting portion 31 is greater than the height of the second side portion 312 of the mounting portion 31, thereby preventing the blade 2 from disengaging from the second locking portion 42 when swinging, and improving the installation stability of the blade 2. The surface where the second locking portion 42 and the first locking portion 41 abut is an inclined surface. When the second locking portion 42 moves from the locked position to the released position, the second locking portion 42 moves upward while moving towards the direction of the first side portion 311. The inclined surface is designed to match the different heights of the first side portion 311 and the second side portion 312 of the mounting portion 31, and also to ensure the smooth movement of the second locking portion 42 between the locked position and the released position.

[0100] A reset member 33 is also provided between the operating part 32 and the mounting part 31. The reset member 33 is sleeved on the operating part 32. The reset member 33 is used to reset the second locking part 42 in the vertical direction. The elastic member 52 provided between the operating part 32 and the cutter head 1 is used to reset the second locking part 42 from the first side 311 to the second side 312.

[0101] In this embodiment, a second sealing element 38 is also provided between the operating part 32 and the mounting part 31 to increase the sealing between them and reduce the probability of grass clippings entering between them. A sealing ring or other sealing structure may also be provided between the operating part 32 and the fixing part 34 to reduce the likelihood of grass clippings entering the locking assembly 4 from between the operating part 32 and the fixing part 34.

[0102] Please see Figures 13 to 15 In one embodiment, when the second locking part 42 is in the locked position, the second locking part 42 and the first locking part 41 are misaligned, meaning that the axis of the second locking part 42 and the axis of the first locking part 41 do not overlap. This allows at least a portion of the cross-sectional dimensions of the second locking part 42 and the first locking part 41 to be larger than the size of the through hole 21 along a plane parallel to the blade 2, so that the blade 2 can be mounted on the cutter head 1. When the second locking part 42 is in the released position, the second locking part 42 and the first locking part 41 are coaxial, meaning that the axis of the second locking part 42 and the axis of the first locking part 41 overlap, forming a path through which the blade 2 can pass, allowing the blade 2 to be disassembled or installed.

[0103] In this embodiment, the size of the through hole 11 is larger than the size of the operating part 32 along the axial direction perpendicular to the cutter head 1. The operating part 32 can move laterally within the through hole 11, wherein the lateral movement is along a plane parallel to the cutting plane, that is, on a horizontal plane. When the second locking part 42 is in the locked position, the operating part 32 is close to the second side 312 of the mounting part 31, and one end of the second locking part 42 protrudes from the second side 312 of the mounting part 31 on the horizontal plane to increase the cross-sectional size of the locking assembly 4. When the second locking part 42 is in the released position, the operating part 32 is close to the first side 311 of the mounting part 31.

[0104] The first locking part 41 has a third guide surface 411, and the second locking part 42 has a fourth guide surface 422. The third guide surface 411 and the fourth guide surface 422 are arranged parallel to each other and are inclined towards the first side part 311 from the direction of the operating part 32 toward the second locking part 42. The pressing part 35 is connected to the end of the operating part 32 away from the second locking part 42. When an external force is applied to the pressing part 35, under the action of the third guide surface 411 and the fourth guide surface 422, the pressing part 35 drives the operating part 32 and the second locking part 42 to move toward the direction of the first side part 311, and the second locking part 42 moves to the release position. After the external force is removed, the pressing part 35 is reset to its original position under the action of the reset member 33 provided between the operating part 32 and the pressing part 35, and the second locking part 42 is in the locked position.

[0105] A guiding mating surface is also provided between the operating part 32 and the fixing part 34 to further ensure the smooth movement of the second locking part 42 between the locked position and the released position.

[0106] In this embodiment, the operating surface 321 formed on the pressing part 35 and the blade 2 are arranged opposite to each other on both sides of the cutter head 1. By pressing the operating surface 321 from the bottom of the cutter head 1, the second locking part 42 can be driven to move from the locked position to the released position, which is simple to operate.

[0107] This disclosure also provides a lawnmower, which can be a ride-on lawnmower, a stand-up lawnmower, a smart lawnmower, or a lawnmower with multiple operating modes, such as a lawnmower with an automatic operating mode and a user-operated manual operating mode. Changes in the form of the lawnmower do not substantially affect the structure and function of this disclosure. This embodiment uses a smart lawnmower as an example for detailed description.

[0108] Please see Figure 16The intelligent lawnmower 200 includes a body 6 and a moving component 7. The moving component 7 is mounted on the body 6 and is used to support and drive the body 6 to move within the working area according to received drive commands to complete the operation. The moving component 7 includes drive wheels 71, which typically include rollers and a motor that drives the rollers to rotate. There may be two sets of drive wheels 71, which are located on both sides of the body 6. In this embodiment, the two sets of drive wheels 71 are located at the rear end of the body 6 as rear wheels. A steering wheel (not shown) is located at the front end of the body 6, and the steering wheel is positioned opposite to the sides of the body 6. The steering wheel is used to turn the body 6, and the drive wheels 71 are used to move the body 6. In other embodiments, the two sets of drive wheels 71 can be positioned as front wheels at the front end of the body 6, or the lawnmower can include three sets of drive wheels 71, with one set of drive wheels 71 as front wheels at the front end of the body 6 and the other two sets of drive wheels 71 as rear wheels at the rear end of the body 6, thereby moving the body 6 through the movement of the three sets of drive wheels 71. Optionally, the moving component can also be a structure capable of driving the body to move, such as tracks, which will not be listed here.

[0109] The intelligent lawnmower 200 also includes a blade assembly 100 located at the bottom of the body 6, which rotates around its own axis under a driving force. Optionally, the intelligent lawnmower 200 also includes a drive assembly (not shown) located on the body 6. The blade assembly 100 rotates around its own axis under the driving force of the drive assembly. The drive assembly can be a power structure such as a motor, which is existing technology and will not be described in detail here. The output end 32 of the drive assembly is connected to the blade assembly 100 to drive the blade assembly 100 to rotate around its own axis for cutting.

[0110] The number of blade disc assemblies 100 can be one, two, three, etc., and the number of drive assemblies is the same as the number of blade disc assemblies 100, with each drive assembly corresponding to a blade disc assembly 100. In some embodiments, at least two sets of blade disc assemblies 100 are provided, with each set of blade disc assemblies 100 staggered on the body 6 to avoid a straight line arrangement that would increase the space occupied, thus improving the structural compactness of the intelligent lawnmower 200. Furthermore, to avoid grass leakage, the cutting areas of adjacent sets of blade disc assemblies 100 are connected or at least partially overlap. The blade disc assemblies 100 can be positioned between the front and rear wheels and the rear wheel. It is understood that the blade disc assemblies 100 can not only be positioned between the front and rear wheels, but can also be positioned on the front, rear, or side of the body 6.

[0111] The cutter head assembly 100 includes a cutter head 1, blades 2 disposed on the cutter head 1 and rotating synchronously with the cutter head 1, and a mounting part 31 and a locking assembly 4 for mounting the blades 2 onto the cutter head 1. Each blade 2 is independently of a regular or irregular shape, which may be circular, rectangular or other shapes.

[0112] The mounting part 31 is used to limit the blade 2 to be positioned on the cutter head 1 in the radial direction. It is understood that the number of blades 2 corresponds to the number of mounting parts 31; one mounting part 31 corresponds to one blade 2, thus mounting the blade 2 on the cutter head 1. The mounting part 31 is the mounting part 31 shown in any of the above embodiments, and will not be described again here. Obviously, the locking component 4 is used to limit the blade to be positioned on the cutter head 1 in the axial direction. The locking component 4 and the mounting part 31 are provided in a one-to-one correspondence, and their numbers are the same. The locking component 4 is the locking component 4 shown in any of the above embodiments, and will not be described again here. The operating part 32 is connected to the second locking part 42 in the locking component 4. When an external force is applied to the operating part 32, the operating part 32 drives the second locking part 42 to move between the locked position and the released position. When the second locking part 42 is in the locked position, as... Figure 2 and Figure 3 As shown, the locking component 4 limits the blade 2 to the cutter head 1, and the blade 2 and the cutter head 1 rotate synchronously when the cutter head assembly 100 is performing cutting operations. When the second locking part 42 is in the released position, as... Figure 6 As shown, the through hole 21 of the blade 2 is removed from or installed on the cutter head 1 via a path to facilitate the replacement of the blade 2. The locking component 4 of the cutter head assembly 100 forms a path for the blade 2 to move under the action of external force. The blade 2 is removed or installed at least along the axial direction of the cutter head 1. This removal and installation method does not require the use of other auxiliary tools, is simple to operate, and does not require removing at least part of the structure of the locking component 4 from the cutter head 1, effectively avoiding the loss of structure, improving replacement efficiency, and eliminating the need to open a removal channel on the blade 2 that communicates with the through hole 21. This effectively prevents the blade 2 from being thrown out by centrifugal force and is compatible with older blades 2 on the market, without changing the user's removal and installation habits.

[0113] The intelligent lawnmower 200 may also include an energy module (not shown) for providing energy for various operations of the intelligent lawnmower 200. The energy module may include a rechargeable battery and a charging connection structure, wherein the charging connection structure is typically a charging electrode plate that can be used in conjunction with a charging electrode plate provided at a docking station to charge the intelligent lawnmower 200.

[0114] The intelligent lawnmower 200 also includes a control device installed on the body 6. This control device is connected to the moving component 7 and the blade assembly 100 to control the automatic movement and operation of the intelligent lawnmower 200. Its functions include controlling the blade assembly 100 to start or stop, generating a movement path and controlling the moving component 7 to move along the path, judging the power of the energy module and controlling the intelligent lawnmower 200 to return to the docking station for automatic charging, etc.

[0115] To enable the intelligent lawnmower 200 to move and cut grass autonomously without user intervention, thus improving the user experience, the intelligent lawnmower 200 also includes a positioning device (not shown) mounted on the body 6. This device acquires the lawnmower's own position coordinates, allowing it to navigate automatically along a preset path. The positioning device includes a locator for receiving satellite signals and / or base station signals and outputting positioning data. A control device 5, located within the body 6, acquires the location data of the self-moving device based on the positioning data output by the locator. The positioning device can be offset or centrally mounted on the body 6. Optionally, the positioning device can also be detachably connected to the body 6. Alternatively, the positioning device can acquire its coordinate information through absolute or relative positioning. Accordingly, the positioning device can include visual sensors such as monocular cameras, multi-view cameras, depth cameras, image sensors, satellite positioning sensors, etc., and can employ one or more of the following positioning technologies to obtain its coordinate information: GPS technology, vision-based simultaneous localization and mapping (VSLAM) technology, real-time dynamic kinematics (RTK) positioning technology, etc.

[0116] In one embodiment, the intelligent lawnmower 200 includes a grass guard disc (not shown) located on the side of the cutter head 1 away from the body 6 and rotatably connected to the cutter head 1. That is, the grass guard disc is not driven to rotate by the drive assembly. When the cutter head assembly 100 is cutting, the grass guard disc can slide in a translational motion against the lawn according to the movement of the intelligent lawnmower 200, thereby achieving contact between the grass guard disc and the lawn. The grass guard disc can remain stationary or rotate slowly. The grass guard disc is positioned below the cutter head 1, blocking or reducing contact between the lawn and the cutter head 1, reducing the frictional resistance of the lawn against the cutter head 1 and the energy loss from the rotation of the cutter head 1, thereby reducing the cutting load and cutting energy consumption, and improving cutting efficiency. Simultaneously, the grass guard disc can block grass clippings outside the cutter head 1, reducing the amount of grass clippings entering between the cutter head 1 and the blades 2, improving cutting ability. Furthermore, the second locking part 42 or the operating part 32 does not need to directly contact obstacles, preventing the second locking part 42 or the operating part 32 from being worn down by obstacles. The grass guard disc also increases the installation stability between the blades 2 and the cutter head 1.

[0117] The protective disc has an opening, and the projection of the opening along the axial direction of the cutter head 1 at least partially overlaps with the projection of the pressing part 35. Specifically, when replacing the blade 2, the user aligns the opening with the pressing part 35, inserts their finger into the gap between the cutter head 1 and the machine body 6, and applies force to the operating surface 321 to press the operating part 32, driving the operating part 32 to move from the first position to the second position, thereby realizing the removal or installation of the blade 2 and reducing the difficulty of the user replacing the blade 2.

[0118] The disclosed intelligent lawnmower 200 can be applied in commercial scenarios, such as mowing lawns on golf courses. The intelligent lawnmower 200 includes a body 6 and a moving component 7 that moves the body 6 within the working area. The intelligent lawnmower 200 has two blade assemblies 100, each driven to rotate by a drive component to perform cutting operations. The two blade assemblies 100 are staggered, and their cutting trajectories at least partially overlap. The control device of the intelligent lawnmower 200 is electrically connected to the moving component 7 and the drive component to control the body 6 to move along a preset path within the working area and perform automatic cutting operations. The energy module of the intelligent lawnmower 200 provides energy to the moving component 7, the drive component, etc. The upper and lower surfaces of the blade 1 serve as cutting planes, and three blades 2 are mounted on each cutting plane. The blade 2 is fitted onto the mounting portion 31 to limit its position on the cutter head 1 in the radial direction. The locking assembly 4 is used to limit the blade 2 at least in the axial direction of the cutter head 1. The locking assembly 4 includes a first locking portion 41 formed on the mounting portion 31 and a second locking portion 42 that engages with the first locking portion 41. The cutter head assembly 100 also includes an operating portion 32 connected to the second locking portion 42. When an external force is applied to the operating portion 32, the operating portion 32 drives the second locking portion 42 to move between a locked position and a released position. When the second locking portion 42 is in the locked position, the first locking portion 41 and the second locking portion 42 are engaged to connect the blade 2 to the cutter head 2; when the second locking portion 42 is in the released position, the first locking portion 41 and the second locking portion 42 are disengaged, forming a path for the blade 2 to move at least in the axial direction of the cutter head 1 to separate the blade 2 from the cutter head 1. By applying external force, the locking component 4 forms a path for the removal or installation of the blade. No other auxiliary tools are required, making the operation simple. There is no need to remove parts of the locking component 4 from the cutter head 1, effectively preventing the loss of parts and improving replacement efficiency.

[0119] In summary, the locking component of the blade assembly used in lawnmowers creates a path for the blades to move under external force. The blades move at least along the axial direction of the blade disc for disassembly or installation. This disassembly and installation method requires no additional tools, is simple to operate, and eliminates the need to remove parts of the locking component from the blade disc, effectively preventing component loss and improving replacement efficiency. Furthermore, it eliminates the need for disassembly channels communicating with through holes on the blades, effectively preventing the blades from being thrown out by centrifugal force and ensuring compatibility with older blades on the market. It also does not require changing the user's disassembly and installation habits. Installing this blade assembly on a lawnmower improves the user experience.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A blade assembly for use in a lawnmower, characterized in that, include: Cutterhead (1); The blade (2) is detachably mounted on the cutter head (1), and the blade (2) has a through hole (21); A mounting part (31) is provided on the cutter head (1) for limiting the blade (2) in the radial direction of the cutter head (1); The locking assembly (4) includes a first locking part (41) formed on the mounting part (31) and a second locking part (42) that cooperates with the first locking part (41); The operating part (32) is connected to the second locking part (42). When an external force is applied to the operating part (32), the operating part (32) drives the second locking part (42) to move between the locked position and the released position. When the second locking part (42) is in the locked position, the first locking part (41) and the second locking part (42) are in a cooperating state to connect the blade (2) to the cutter head (1); When the second locking part (42) is in the released position, the first locking part (41) and the second locking part (42) are in a separated state, forming a path for the blade (2) to move at least along the axial direction of the cutter head (1) so that the blade (2) and the cutter head (1) are separated.

2. The cutter head assembly as described in claim 1, characterized in that, When the second locking part (42) is in the locked position, the sum of the cross-sections of the first locking part (41) and the second locking part (42) along the plane parallel to the blade (2) is at least partially greater than the size of the through hole (21); when the second locking part (42) is in the released position, the size of the cross-section of the path along the direction of movement perpendicular to the blade (2) is less than or equal to the size of the through hole (21).

3. The cutter head assembly as described in claim 1 or 2, characterized in that, Along the axial direction perpendicular to the cutter head (1), the cross-sectional dimension of the path is less than or equal to the dimension of the through hole (21).

4. The cutter head assembly as described in claim 1, characterized in that, The operating part (32) is configured to move along the axial direction of the cutter head (1) when subjected to a force at least along the axial direction of the cutter head (1) to drive the second locking part (42) to move between the locked position and the released position.

5. The cutter head assembly as described in claim 1, characterized in that, The cutter head (1) is provided with a through hole (11) extending along the axial direction of the cutter head (1). At least a portion of the through hole (11) is formed on the mounting part (31). The operating part (32) is at least partially movably disposed in the through hole (11). The second locking part (42) is connected to one end of the operating part (32) near the mounting part (31). The opening size of the through hole (11) is smaller than the cross-sectional size of the second locking part (42) along the surface where the opening is located. The opening is formed at one end of the through hole (11) near the mounting part (31).

6. The cutter head assembly as described in claim 5, characterized in that, The thickness of the side of the mounting part (31) located near the rotation axis of the cutter head (1) is greater than or equal to the thickness of the side of the mounting part (31) located away from the rotation axis of the cutter head (1).

7. The cutter head assembly as described in claim 5, characterized in that, The second locking part (42) is offset relative to the mounting part (31), the mounting part (31) has a first side part (311) and a second side part (312), the first side part (311) is away from the direction in which the second locking part (42) is offset relative to the mounting part (31), the second side part (312) is close to the direction in which the second locking part (42) is offset relative to the mounting part (31), and the height of the first side part (311) is greater than the height of the second side part (312).

8. The cutter head assembly as described in claim 7, characterized in that, The first side portion (311) is provided with a first guide surface (313), and the second locking portion (42) is provided with a second guide surface (421) on the side near the second side portion (312). From the direction of the operating portion (32) toward the location of the second locking portion (42), the first guide surface (313) and the second guide surface (421) are inclined toward the second side portion (312).

9. The cutter head assembly as claimed in claim 1, characterized in that, The cutter head assembly (100) further includes a reset member (33) connected to the operating part (32). When an external force is applied to the operating part (32), the operating part (32) moves between a first position and a second position. When the operating part (32) is in the first position, the second locking part (42) is in the locked position. When the operating part (32) is in the second position, the second locking part (42) is in the released position. When the operating part (32) moves from the first position to the second position, the reset member (33) applies a force to the operating part (32) at least toward the first position.

10. A lawnmower, characterized in that, include: Fuselage (6); A movable component (7) is disposed on the body (6) to support and drive the body (6) to move within the working area; The cutter head assembly (100) is located at the bottom of the machine body (6), and the cutter head assembly (100) rotates around its own axis under the driving action; The cutter head assembly (100) is the cutter head assembly (100) as described in any one of claims 1 to 9.

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