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 blade limiting piece, a locking assembly and an operation part, the blade limiting piece is used for radially limiting the blade on the cutterhead, the blade limiting piece is detachably connected to the cutterhead, through external force acting on the operation part, so that the blade limiting piece and the cutterhead are separated, the replacement of the blade limiting piece is convenient and fast. When the locking assembly is in the locked state, the blade limiting piece can stably install the blade on the cutterhead, avoid the blade from falling in the high-speed rotating process, and improve the safety and reliability of the mowing operation; when it is necessary to replace the blade or the blade limiting piece, only external force needs to be applied to the operation part, so that the locking assembly can be switched from the locked state to the released state, the blade and the blade limiting piece can be replaced, the blade limiting piece is avoided from being worn and broken under the action of the blade to cause the blade to fall to the lawn, and the cutting effect is affected and the active personnel are threatened.

Description

[0001] This application claims priority to Chinese patent application CN202411745658.5, 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 feature rotary blades mounted on a blade disc, driven by a motor to rotate the disc at high speed. The blades rotate under centrifugal force, achieving efficient mowing. After a period of use, the blades' mowing effectiveness decreases, requiring replacement to maintain mowing efficiency. Summary of the Invention

[0005] The purpose of this disclosure is to provide a highly safe blade assembly for use in lawnmowers and a lawnmower.

[0006] To achieve the above-mentioned objectives, this disclosure provides a blade assembly for a lawnmower, the blade assembly comprising:

[0007] Cutter head;

[0008] The blade is mounted on the cutter head;

[0009] A blade limiting member is detachably mounted on the cutter head, including a blade radial limiting portion, which is used to limit the blade radially on the cutter head;

[0010] Locking components, including:

[0011] A first locking part is disposed on the cutter head;

[0012] A second locking part is provided on the blade limiting member, and the second locking part can be locked in conjunction with the first locking part.

[0013] An operating unit is disposed in the locking assembly and includes an operating area for external force application;

[0014] in:

[0015] When an external force is applied to the operating area, the locking component switches between a locked state and a released state;

[0016] When the locking component is in the locked state, the first locking part and the second locking part are locked together, and the blade limiting member is axially limited to the cutter head;

[0017] When the locking component is in the released state, the projections of the first locking part and the second locking part along the axial direction do not overlap, and the blade limiting member loses its axial limiting constraint and can be separated from the cutter head.

[0018] As a further improvement of this disclosure, the cutter head assembly further includes a receiving cavity disposed on the cutter head, and the operating area is received within the receiving cavity.

[0019] As a further improvement of this disclosure, the operating area is configured such that when subjected to external forces in at least two different directions, the operating part causes the locking component to switch between a locked state and a released state.

[0020] As a further improvement of this disclosure, when the operating area is subjected to a tangential force along the rotation direction of the cutter head, the operating part drives the locking component to rotate to achieve state switching.

[0021] As a further improvement of this disclosure, the cutter head assembly further includes a stop assembly, the stop assembly including a first stop member disposed on the cutter head and a second stop member disposed on the operating part, the first stop member and the second stop member cooperating to restrict the operating part from rotating within a preset angle.

[0022] As a further improvement of this disclosure, the cutter head assembly also includes a limiting structure that, when the locking component is in a locked state, limits and blocks the locking component to maintain the locked state stably.

[0023] As a further improvement of this disclosure, the locking assembly also has a disengaged state, in which the blade limiter is separated from the cutter head in the axial direction when the locking assembly is in the disengaged state.

[0024] As a further improvement of this disclosure, when the locking component is in the locked state, the blade limiting member can rotate relative to the blade disc about its own central axis.

[0025] This disclosure also provides a blade assembly for use in a lawnmower, the blade assembly comprising:

[0026] Cutter head;

[0027] The blade is mounted on the cutter head;

[0028] A blade limiting member includes a blade radial limiting part, which is used to limit the blade radially to the cutter head;

[0029] A locking component is disposed on the cutter head assembly, including a first locking part and a second locking part that can lock and engage with the first locking part;

[0030] An operating unit is disposed in the locking assembly and includes an operating area for external force application;

[0031] in:

[0032] When an external force is applied to the operating area, the locking component switches between a locked state and a released state;

[0033] When the locking component is in the locked state, the first locking part and the second locking part are locked together, and the blade is axially limited to the cutter head;

[0034] When the locking component is in the released state, the projections of the first locking part and the second locking part along the axial direction do not overlap, and the blade loses its axial limiting constraint and can be separated from the cutter head;

[0035] The cutter head is provided with a receiving cavity, and the operating area is received within the receiving cavity.

[0036] As a further improvement of this disclosure, the blade limiting member is detachably mounted on the cutter head. When the locking assembly is in the locked state, the first locking part and the second locking part are locked together, and the blade limiting member is axially limited to the cutter head.

[0037] When the locking component is in the released state, the projections of the first locking part and the second locking part along the axial direction do not overlap, and the blade limiting member loses its axial limiting constraint and can be separated from the cutter head.

[0038] As a further improvement of this disclosure, the locking assembly also has a disengaged state, wherein when the locking assembly is in the disengaged state, the blade limiting member is separated from the cutter head in the axial direction; and / or,

[0039] When the locking component is in the locked state, the blade limiting member can rotate relative to the cutter head about its own central axis.

[0040] As a further improvement of this disclosure, the first locking part is disposed on the cutter head, and the second locking part is disposed on the blade limiting member; and / or,

[0041] The cutter head assembly also includes a limiting structure. When the locking component is in the locked state, the limiting structure forms a limiting block on the locking component to keep the locked state stably maintained.

[0042] As a further improvement of this disclosure, the operating area is configured such that when subjected to external forces in at least two different directions, the operating part causes the locking component to switch between a locked state and a released state.

[0043] As a further improvement of this disclosure, when the operating area is subjected to a tangential force along the rotation direction of the cutter head, the operating part drives the locking component to rotate to achieve state switching.

[0044] As a further improvement of this disclosure, the cutter head assembly further includes a stop assembly, the stop assembly including a first stop member disposed on the cutter head and a second stop member disposed on the operating part, the first stop member and the second stop member cooperating to restrict the operating part from rotating within a preset angle.

[0045] This disclosure also provides a blade assembly for use in a lawnmower, the blade assembly comprising:

[0046] Cutter head;

[0047] The blade is mounted on the cutter head;

[0048] A blade limiting member is installed on the cutter head and includes a blade radial limiting part, which is used to limit the blade radially on the cutter head;

[0049] The blade limiting member is radially clearance-fitted with the cutter head so that the blade limiting member can rotate relative to the cutter head about its own central axis.

[0050] As a further improvement of this disclosure, the blade limiting member is detachably mounted on the cutter head, and the cutter head assembly further includes:

[0051] A locking component is disposed on the cutter head assembly, including a first locking part and a second locking part that can lock and engage with the first locking part;

[0052] An operating unit is disposed in the locking assembly and includes an operating area for external force application;

[0053] in:

[0054] When an external force is applied to the operating area, the locking component switches between a locked state and a released state;

[0055] When the locking component is in the locked state, the first locking part and the second locking part are locked together, and the blade limiting member is axially limited to the cutter head;

[0056] When the locking component is in the released state, the projections of the first locking part and the second locking part along the axial direction do not overlap, and the blade limiting member loses its axial limiting constraint and can be separated from the cutter head.

[0057] As a further improvement of this disclosure, the first locking part is disposed on the cutter head, and the second locking part is disposed on the blade limiting member.

[0058] As a further improvement of this disclosure, the cutter head assembly further includes a receiving cavity disposed on the cutter head, and the operating area is received within the receiving cavity.

[0059] As a further improvement of this disclosure, when the operating area is subjected to a tangential force along the rotation direction of the cutter head, the operating part drives the locking component to rotate to achieve state switching.

[0060] This disclosure also provides a blade assembly for use in a lawnmower, the blade assembly comprising:

[0061] Cutter head;

[0062] The blade is mounted on the cutter head;

[0063] A blade limiting member is detachably mounted on the cutter head, including a blade radial limiting portion, which is used to limit the blade radially on the cutter head;

[0064] A locking component is disposed on the cutter head assembly, including a first locking part and a second locking part that can lock and engage with the first locking part;

[0065] An operating unit is disposed in the locking assembly and includes an operating area for external force application;

[0066] in:

[0067] The operating area is configured such that when subjected to a tangential force along the rotation direction of the cutter head, the operating part drives the locking component to rotate to switch between a locked state and a released state.

[0068] When the locking component is in the locked state, the first locking part and the second locking part are locked together, and the blade limiting member is axially limited to the cutter head;

[0069] When the locking component is in the released state, the projections of the first locking part and the second locking part along the axial direction do not overlap, and the blade limiting member loses its axial limiting constraint and can be separated from the cutter head.

[0070] As a further improvement of this disclosure, the first locking part is disposed on the cutter head, and the second locking part is disposed on the blade limiting member.

[0071] As a further improvement of this disclosure, the cutter head assembly further includes a receiving cavity disposed on the cutter head, and the operating area is received within the receiving cavity.

[0072] As a further improvement of this disclosure, when the locking component is in the locked state, the blade limiting member can rotate relative to the blade disc about its own central axis.

[0073] This disclosure also provides a lawnmower, comprising:

[0074] body;

[0075] A movable component, disposed on the machine body, supports and drives the machine body to move within the working area;

[0076] The cutter head assembly is located at the bottom of the machine body and rotates around its own axis under the driving action;

[0077] The cutter head assembly is the cutter head assembly described above.

[0078] As a further improvement to this disclosure, the walking speed of the lawnmower is greater than or equal to 0.8 m / s; and / or,

[0079] The rotational speed of the cutter head assembly is greater than 2000 rpm / min.

[0080] The beneficial effects of this disclosure are as follows: By setting a blade limiting component and a locking assembly that can switch between locked and released states, this disclosure achieves dual radial and axial limiting of the blade. The blade limiting component is detachably installed on the cutter head, allowing for timely replacement and preventing the blade limiting component from wearing and breaking under the action of the blade, which could cause the blade to fall onto the lawn, affecting the cutting effect and posing a threat to personnel. When the locking assembly is in the locked state, the blade limiting component can stably install the blade on the cutter head, preventing the blade from falling off during high-speed rotation, thus improving the safety and reliability of lawn mowing operations. When it is necessary to replace the blade or the blade limiting component, simply applying external force to the operating part can switch the locking assembly from the locked state to the released state, allowing the blade limiting component and the blade to be easily separated from the cutter head. This enables quick disassembly and assembly of the blade or the blade limiting component, significantly improving the efficiency of maintaining and replacing the blade or the blade limiting component, and reducing the difficulty and time cost of manual operation.

[0081] By housing the operating area within the receiving cavity of the blade disc, the operating area is less likely to be touched by external forces when the lawnmower is cutting, thereby reducing the risk of accidental triggering and improving the safety and reliability of blade installation. Attached Figure Description

[0082] Figure 1 This is a schematic diagram of the structure of the cutter head assembly shown in some embodiments of this disclosure.

[0083] Figure 2 for Figure 1 Another structural schematic diagram of the cutter head assembly shown.

[0084] Figure 3 for Figure 1 The diagram shows a cross-sectional view of a portion of the cutterhead assembly.

[0085] Figure 4 for Figure 1 The diagram shows a cross-sectional view of a portion of the blade limiting component mounted on the cutter head.

[0086] Figure 5 for Figure 1 The diagram shows a cross-sectional view of the first locking part in the released position.

[0087] Figure 6 for Figure 1 Another cross-sectional view of the portion of the blade limiter mounted on the cutter head shown.

[0088] Figure 7 for Figure 1 Another cross-sectional view of the partial structure of the first locking part in the released position shown.

[0089] Figure 8 for Figure 1 Another structural schematic diagram of the cutter head assembly shown.

[0090] Figure 9 for Figure 1 The cross-sectional view shown includes at least the limiting structure.

[0091] Figure 10 for Figure 1 Another cross-sectional view shown includes at least the limiting structure.

[0092] Figure 11 for Figure 1 The cross-sectional view shown includes at least an operating part and a blade limiter, with the first locking part in the released position.

[0093] Figure 12 for Figure 1 The cross-sectional view shown includes at least an operating part and a blade limiter, with the first locking part in the locked position.

[0094] Figure 13 for Figure 1 The cross-sectional view shown includes at least a stop assembly.

[0095] Figure 14 Figure 1 The cross-sectional view shown shows the first locking part in the locked position.

[0096] Figure 15 Figure 1 The diagram shows a cross-sectional view of the external tool extending into the cutter head.

[0097] Figure 16 Figure 1 The cross-sectional view shown shows the external tool rotating to put the first locking part in the released position.

[0098] Figure 17 Figure 1 The diagram shows a cross-sectional view of an external tool removing the blade retainer from the cutter head.

[0099] Figure 18 This is a cross-sectional view of a portion of the structure of the cutter head assembly shown in some embodiments of this disclosure.

[0100] Figure 19 for Figure 18 The diagram shows a cross-sectional view of a portion of the blade limiting component mounted on the cutter head.

[0101] Figure 20 for Figure 18 The diagram shows a cross-sectional view of the first locking part in the released position.

[0102] Figure 21 for Figure 18 The diagram shows a cross-sectional view of the blade stopper and the portion of the blade removed from the cutter head.

[0103] Figure 22 for Figure 18 The diagram shows a cross-sectional view of the structure of the reset member and the operating part.

[0104] Figure 23 for Figure 18 The diagram shows a structural schematic of a cutter head assembly with a protective disc.

[0105] Figure 24 for Figure 23 The cutter head assembly with a protective disc is shown in cross-sectional view.

[0106] Figure 25 This is a cross-sectional view of a portion of the structure of the cutter head assembly shown in some embodiments of this disclosure.

[0107] Figure 26 for Figure 25 The diagram shows a cross-sectional view of a portion of the blade limiting component mounted on the cutter head.

[0108] Figure 27 for Figure 25 The diagram shows a cross-sectional view of the first locking part in the released position.

[0109] Figure 28 for Figure 25The diagram shows a cross-sectional view of the portion of the blade limiter, blade, and locking assembly removed from the cutter head.

[0110] Figure 29 This is a cross-sectional view of a portion of the structure of the cutter head assembly shown in some embodiments of this disclosure.

[0111] Figure 30 for Figure 29 The diagram shows a cross-sectional view of a portion of the blade limiting component mounted on the cutter head.

[0112] Figure 31 for Figure 29 The diagram shows a cross-sectional view of the first locking part in the released position.

[0113] Figure 32 for Figure 29 The diagram shows a cross-sectional view of the portion of the blade limiter, blade, and locking assembly removed from the cutter head.

[0114] Figure 33 This is a cross-sectional view of a portion of the structure of an intelligent lawnmower as shown in some embodiments of this disclosure.

[0115] Figure 34 This disclosure presents partial structural schematic diagrams of the cutter head assembly shown in some embodiments.

[0116] Figure 35 This disclosure presents another schematic diagram of a portion of the structure of the cutter head assembly shown in some embodiments.

[0117] The components include: cutter head assembly - 100; blade - 1; through hole - 11; cutter head - 2; receiving cavity - 21; receiving hole - 211; extension - 212; circular mounting part - 213; third side - 214; fourth side - 215; accommodating space - 22; connecting hole - 23; insert - 25; limiting block - 26; reset part - 27; sealing cover - 28; holding part - 29; blade limiting part - 3; mounting part - 30; blade radial limiting part - 31; blade axial limiting part - 32; receiving hole - 33; mounting cavity - 34; sealing part - 35; mounting channel - 36; second guide surface - 37; and locking assembly - 4. First locking part - 41; First guide surface - 411; Second locking part - 42; Limiting structure - 43; Limiting part - 431; Blocking part - 432; Operating part - 5; Operating area - 51; Slot - 52; Limiting slot - 53; Through hole - 54; Stop assembly - 55; First stop member - 551; Second stop member - 552; First side part - 561; Second side part - 562; Protrusion part - 57; Elastic member - 58; External tool - 8; Anti-detachment structure - 81; Intelligent lawnmower - 200; Body - 6; Moving component - 7; Drive wheel - 71; Protective disc - 9; Alignment hole - 91; Mounting structure - 300. Detailed Implementation

[0118] 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.

[0119] Lawn mower blades are typically fixed to the blade disc with screws. When replacing blades, power tools or screwdrivers are needed to unscrew the screws before removing the old blades. After installing the new blades, the screws also need to be tightened. Using power tools to operate the screws poses a risk of injury to the operator as the power tool can rotate the blade disc. Therefore, manual screwdriver operation is necessary. This method of blade replacement is time-consuming. For dual-disc lawnmowers with three blades per disc, blade replacement can easily exceed five minutes. This is mainly because unscrewing or tightening the screws requires repeated rotation, and the screwdriver's loose fit can cause the blade disc to rotate, requiring the operator to rotate the disc again to align the screwdriver with the screw, wasting time. Furthermore, the rotation of the blade disc can easily cause injury to the operator from the blades located on it. Especially for lawnmowers equipped with protective discs, a screwdriver needs to pass through the protective disc and engage with the screw. When the blade rotates, the blade needs to be rotated to expose the screw from the opening of the protective disc before it can be operated on, which is more time-consuming and laborious.

[0120] When a lawnmower is working, the blades rotate synchronously with the cutter head under centrifugal force. When the rotating blades come into contact with grass in front of the cutter head, the blades experience resistance from the grass and rotate at a small angle relative to the screw. After cutting the grass, the blades rotate in the opposite direction relative to the screw under centrifugal force to return to their original position. Each rotation of the blade cuts grass once, and the blades wear down twice relative to the screw. Over time, this wear can easily occur at the blade mounting point on the screw, specifically at the radial limit of the blade on the cutter head. If the screw is not replaced in time, it can easily break, causing the blade to fall from the cutter head onto the grass. A blade on the grass poses a potential threat to people. This is especially true when lawnmowers are used in commercial settings, such as on golf courses, where the threat of a falling blade cannot be ignored. To prevent blades from falling onto the grass and causing injury, severely worn screws need to be replaced promptly. When replacing screws, you also need to use a screwdriver or other auxiliary tools to unscrew the screw, install the blade on the new screw, and then use the auxiliary tools to tighten the new screw. The replacement operation is time-consuming.

[0121] When lawnmowers are used in commercial settings, they operate for long hours daily, with high-speed blade assembly rotation and fast travel. This results in a large number of rotations of the blade assembly within a short period, leading to frequent wear on the blade mounting points and necessitating timely replacement of the blade radial limiters that confine the blades radially to the blade assembly. For example, lawnmowers used on golf courses often operate for 16 hours or more daily without interruption. To ensure cutting efficiency, the lawnmower's travel speed must exceed 0.8 m / s, and the blade assembly rotation speed must be at least 2000 rpm / min, typically around 3600 rpm / min. The blade radial limiters, which confine the blades radially to the blade assembly, generally need to be replaced approximately every four weeks. Therefore, timely replacement is crucial when using lawnmowers in commercial settings. In other applications, such as home use, lawnmowers have short operating hours and low operating frequency, typically once or twice a week. Their low speed and slow travel mean that the radial limit of the blades is less worn and does not require frequent replacement.

[0122] This disclosure enables quick replacement of the cutting tool and quick replacement of the cutting tool limiting component that radially limits the cutting tool on the cutting head, making operation simple.

[0123] Please see Figures 1 to 5The blade assembly 100 for a lawnmower shown in some embodiments of this disclosure includes a blade disc 2, blades 1 mounted on the blade disc 2, and blade limiting members 3 detachably mounted on the blade disc 2. The blade limiting member 3 includes a radial limiting portion 31 for radially limiting the blades 1 on the blade disc 2. Specifically, the blades 1 have a through hole 11 located at one end, and the blades 1 are fitted onto the radial limiting portion 31 through the through hole 11. When the blade limiting member 3 is mounted on the blade disc 2, the blades 1 are radially limited on the blade disc 3. The radial direction is as follows: Figure 2 As shown by arrow B in the diagram.

[0124] The cutter head assembly 100 also includes a locking assembly 4, through which the blade limiting member 3 is detachably mounted to the cutter head 2. The locking assembly 4 includes a first locking part 41 disposed on the cutter head 2 and a second locking part 42 disposed on the blade limiting member 3. The second locking part 42 can lock into the first locking part 41.

[0125] The locking component 4 has a locked state and a released state, and can switch between the two states. When the locking component 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the blade limiting member 3 is axially limited to the cutter head 2, preventing it from detaching from the cutter head 2 in the axial direction. When the locking component 4 is in the released state, the axial projections of the first locking part 41 and the second locking part 42 do not overlap, and the blade limiting member 3 loses its axial limiting constraint and can be separated from the cutter head 2, facilitating the replacement and maintenance of the blade limiting member 3 and the blade 1. The axial direction is also the direction of the rotation axis of the cutter head 2, such as... Figure 2 As shown by arrow A in the diagram.

[0126] It should be noted that when the locking component 4 is in the released state, the blade limiter 3 only has the conditions to disengage from the cutter head 2, but the blade limiter 3 does not disengage from the cutter head 2. The blade limiter 3 remains in its position on the cutter head 2, and an external force is required to act on the blade limiter 3 to make the blade limiter 3 disengage from the cutter head 2.

[0127] The locking component 4 also has a separated state, and the released state and the separated state of the locking component 4 are not the same. When the locking component 4 is in the separated state, the first locking part 41 and the second locking part 42 are completely separated, and the blade limiting member 3 is separated from the cutter head 2 in the axial direction, that is, the blade limiting member 3 is completely detached from the cutter head 2.

[0128] When the locking assembly 4 is in the locked state, the blade limiting member 3 and the cutter head 2 are radially clearance-fitted, allowing the blade limiting member 3 to rotate relative to the cutter head 2 around its own central axis. During use, the rotation of the blade 1 may cause the blade limiting member 3 to rotate relative to the cutter head 2, thereby changing the contact and wear position between the blade 1 and the blade limiting member 3. This avoids concentrated wear on the fixed part, extends the service life of the blade limiting member 3, and prevents the blade 1 from falling off during high-speed rotation, improving the safety and reliability of mowing operations. Furthermore, when assembling or disassembling the blade 1, the blade limiting member 3 can change its contact and wear position with the blade 1, similarly improving the safety and reliability of mowing operations.

[0129] When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 along the axial direction do not overlap, that is, there is no overlap between their projection areas, including cases where they are completely separated or only tangent or in contact at the edges. Optionally, when the locking assembly 4 is in the released state, the first locking part 41 and the second locking part 42 are radially separated.

[0130] See Figures 3 to 5 ,and Figure 8 The cutter head assembly 100 also includes an operating part 5 disposed on the locking assembly 4, the operating part 5 including an operating area 51 for external force to be applied. When external force is applied to the operating area 51, the locking assembly 4 switches between a locked state and a released state, thereby realizing the installation and removal of the blade 1 and the blade limiting member 3.

[0131] This disclosure achieves dual radial and axial limiting of the blade 1 by setting a blade limiting component 3 and a locking assembly 4 that can switch between locked and released states. The blade limiting component 3 is detachably installed on the cutter head 2, allowing for timely replacement of the blade limiting component 3 and preventing the blade 1 from wearing off and breaking under the action of the blade limiting component 3, which could cause the blade 1 to fall onto the lawn, affecting the cutting effect and posing a threat to personnel. When the locking assembly 4 is in the locked state, the blade limiting component 3 can stably install the blade 1 on the cutter head 2, preventing the blade 1 from falling off during high-speed rotation, thus improving the safety and reliability of lawn mowing operations. The blade limiting component 3 is easy to disassemble and install. When it is necessary to replace the blade 1 or the blade limiting component 3, simply apply external force to the operating part 5 to switch the locking assembly 4 from the locked state to the released state, allowing the blade limiting component 3 and the blade 1 to be easily separated from the cutter head 2. This enables quick disassembly and assembly of the blade 1 or the blade limiting component 3, significantly improving the efficiency of maintenance and replacement of the blade 1 or the blade limiting component 3, and reducing the difficulty and time cost of manual operation. The blade assembly 100 is installed on the lawnmower to improve the user experience. For a lawnmower with two blades 2, each blade 2 having three blades 1, the time required to replace all blades 1 or blade limiters 3 is only 1.5 minutes, which greatly reduces the time required to replace blades 1 or blade limiters 3 and improves the working efficiency of the lawnmower.

[0132] Optionally, the first locking part 41 may be part of the cutter head 2, and the first locking part 41 may be integrally formed with the cutter head 2. Alternatively, the first locking part 41 may not be part of the cutter head 2, but may be connected to the cutter head 2. The first locking part 41 may be directly connected to the cutter head 2, or connected to the cutter head 2 via the operating part 5 or other components. For example, the first locking part 41 and the operating part 5 are disposed on the insert 25, and the first locking part 41 is disposed on the cutter head 2 by being installed to the cutter head 2 via the insert 25. The second locking part 42 may be part of the blade limiting member 3, and may be integrally formed with the blade limiting member 3. Optionally, the second locking part 42 may not be part of the blade limiting member 3, but may be connected to the blade limiting member 3. The second locking part 42 may be directly connected to the blade limiting member 3, or indirectly connected to the blade limiting member 3 via some components.

[0133] The operating part 5 can be disposed on at least one of the first locking part 41 and the second locking part 42. The operating part 5 can be integrally formed with the first locking part 41 or the second locking part 42. The operating part 5 can also be separately disposed and connected to the first locking part 41 or the second locking part 42. When the operating part 5 is disposed on the first locking part 41, the operating part 5 is disposed on the cutter head 2. When the operating part 5 is disposed on the second locking part 42, the operating part 5 is disposed on the blade limiting member 3. Optionally, the operating part 5 can be an independent part, which can be directly or indirectly connected to the blade limiting member 3 or the cutter head 2. The operating part 5 can also not be an independent part, but a part of the blade limiting member 3 or the cutter head 2. When the operating part 5 is disposed on the cutter head 2, the operating part 5 remains on the cutter head 2 when the blade limiting member 3 is removed from the cutter head 2. When the operating part 5 is disposed on the blade limiting member 3, the operating part 5 and the blade limiting member 3 can be removed from the cutter head 2 together or installed on the cutter head 2 together. Specifically, the operating part 5 and the blade limiting member 3 are detached from or installed onto the cutter head 2 simultaneously as a single component; or, the operating part 5 and the blade limiting member 3 can be detached from or installed onto the cutter head 2 in stages.

[0134] In some embodiments, see Figure 4 and Figure 5 The blade limiting member 3 and the cutter head 2 cooperate to limit the blade 1 on the cutter head 2. That is, the blade limiting member 3 also includes a blade axial limiting member 32 connected to the blade radial limiting member 31. The blade axial limiting member 32 cooperates with the cutter head 2 to limit the blade 1 axially on the cutter head 2. The cooperation between the blade limiting member 3 and the cutter head 2 can limit the blade 1 on the cutter head 2 in both axial and radial directions. The blade 1 can only rotate relative to the blade limiting member 3 or the cutter head 2, or move a limited distance axially, and cannot be removed from the blade limiting member 3.

[0135] In some embodiments, the end of the blade radial limiting portion 31 away from the cutter head 2 protrudes outward to form the blade axial limiting portion 32, allowing the blade 1 to be mounted onto the cutter head 2 in a single component, simplifying the structure. Furthermore, since the blade axial limiting portion 32 is formed on the blade radial limiting portion 31, the component that radially and axially limits the blade 1 onto the cutter head 2 can be simultaneously removed from or simultaneously installed onto the cutter head 2, reducing user operations and facilitating blade 1 replacement, while also increasing the strength and service life of the blade limiting component 3. The diameter of the blade radial limiting portion 31 is less than or equal to the diameter of the through hole 11, while the diameter of the blade axial limiting portion 32 is greater than the diameter of the through hole 11. The blade 1 is fitted onto the blade radial limiting portion 31 from the end of the blade radial limiting portion 31 away from the blade axial limiting portion 32. Because the diameter of the blade axial limiting portion 32 is greater than the diameter of the through hole 11, and the other end of the blade radial limiting portion 31 is aligned with the cutter head 2, the blade 1 cannot move axially and detach from the cutter head 2, ensuring its installation stability.

[0136] In some embodiments, the radial limiting portion 31 and the axial limiting portion 32 of the blade are separately provided. Optionally, the radial limiting portion 31 and the axial limiting portion 32 of the blade are detachably connected to facilitate the replacement of the easily worn radial limiting portion 31. For example, the radial limiting portion 31 is sleeved on at least a portion of the axial limiting portion 32 of the blade, and the axial limiting portion 32 of the blade, when connected to the cutter head 2, limits the radial limiting portion 31 of the blade on the cutter head 2. This arrangement allows only the radial limiting portion 31 of the blade to be replaced when replacing the blade limiting member 3, reducing costs. In other embodiments, the radial limiting portion 31 and the axial limiting portion 32 of the blade are connected by welding or other methods, which are not specifically limited here.

[0137] Optionally, the through hole 11 is a circular hole, and the blade 1 is pivotally connected to the blade limiting member 3. That is, when the blade 1 is installed on the cutter head 2, the blade 1 can rotate freely around at least a portion of the blade limiting member 3. This allows the blade 1 to rotate and avoid obstacles encountered during cutting, reducing damage to the blade 1 and increasing its service life. Furthermore, when not in use, the blade 1 can rotate under force when touched by the user, effectively reducing injury to the user. To accommodate the through hole 11 of the blade 1, the radial limiting part 31 of the blade is a cylindrical structure. Optionally, the diameter of the radial limiting part 31 is smaller than the diameter of the through hole 11, allowing the blade 1 to rotate freely around the radial limiting part 31, thereby reducing damage to the blade 1 during cutting.

[0138] When the blade limiting member 3 is connected to the cutter head 2, there is a gap between the blade axial limiting part 32 and the cutter head 2, which limits the distance the blade 1 can move axially. When the gap is equal to the thickness of the blade 1, the blade 1 cannot move axially. When the gap is greater than the thickness of the blade 1, the distance the blade 1 can move axially is the height of the gap. In this embodiment, the blade 1 can move up and down axially on the blade radial limiting part 31 to reduce the impact on the blade 1 to a certain extent, avoid damage caused by direct impact with obstacles of high hardness, reduce the vibration of the blade 1 during operation, and effectively reduce the jamming between the blade 1 and the cutter head 2, which would prevent the blade 1 from rotating relative to the blade radial limiting part 31. Because the gap is greater than the thickness of the blade 1, when the diameter of the through hole 11 is greater than the diameter of the blade radial limiting part 31, the blade 1 can swing around the blade radial limiting part 31, further reducing the damage to the blade 1. In other embodiments, the gap and the thickness of the blade are the same, so that the blade cannot move up and down axially on the blade radial limiting part, but can only rotate around the blade radial limiting part. The height of the radial limiting part of the blade is not specifically limited here; it can be set according to actual needs.

[0139] Please see Figures 4 to 10The cutter head assembly 100 also includes a receiving cavity 21 disposed within the cutter head 2, and an operating area 51 is housed within the receiving cavity 21. The operating area 51 may not protrude from the surface of the cutter head 2, or the surface of the cutter head 2 may have a component forming at least part of the receiving cavity 21, with the operating area 51 located within that component. This arrangement significantly reduces the risk of the operating area 51 being accidentally triggered. When the cutter head assembly 100 is mounted on the lawnmower body, and the lawnmower is cutting, if the operating area 51 is not located within the receiving cavity 21, branches or other debris in the working area can easily extend into the gap between the cutter head assembly 100 and the body, contacting the operating area 51 and applying force. This can cause the operating part 5 to switch the locking component 4 from a locked state to a released state, causing the blade 1 and blade limiting member 3 to detach, affecting the normal operation of the lawnmower. Furthermore, the fallen blade 1 poses a potential hazard to the user on the lawn. In this embodiment, by placing the operating area 51 inside the cutter head 2, the stability and safety of the cutter head assembly 100 are improved.

[0140] Optionally, the operating area 51 does not protrude from the surface of the cutter head 2 along its axial direction. Optionally, the cutter head 2 has an upper surface and a lower surface that are oppositely arranged in its axial direction. When the cutter head 2 is mounted on the body of the lawnmower, the surface of the cutter head 2 near the body is the upper surface, and the surface of the cutter head 2 near the ground is the lower surface. The fact that the operating area 51 does not protrude from the upper and lower surfaces of the cutter head 2 along its axial direction effectively reduces the contact between branches, stones, etc., and the operating area 51, greatly reducing the risk of the operating area 51 being accidentally triggered.

[0141] Optionally, the operating area 51 can also be located outside the body of the cutter head 2, and a protective cover can be fitted around the outer periphery of the operating area 51. The protective cover forms at least part of the upper or lower surface of the cutter head 2. This arrangement also ensures that the operating area 51 does not protrude from the surface of the cutter head 2, reducing the probability of being accidentally triggered.

[0142] The operating area 51 is configured such that when subjected to external forces from at least two different directions, the operating unit 5 drives the locking component 4 to switch between a locked state and a released state. Foreign objects such as grass clippings, twigs, or stones typically exert a force on the operating area 51 in only one direction during the operation of the cutter head assembly 100, making it difficult to simultaneously satisfy the force conditions from multiple directions. This configuration significantly reduces the probability of the operating area 51 being accidentally triggered. Therefore, the blade limiter 3 can stably maintain the locked state, and the blade 1 will not disengage from the cutter head 2 due to accidental triggering. This not only improves the operational stability of the cutter head assembly 100 but also effectively enhances the safety of the lawnmower during operation.

[0143] Optionally, when the operating area 51 is subjected to a tangential force along the rotation direction of the cutter head 2, the operating part 5 drives the locking component 4 to rotate to achieve state switching. This setting makes the unlocking operation more complex, avoids accidental contact leading to triggering, and further ensures the stability and safety of the cutter head assembly 100 during operation.

[0144] Optionally, the force driving the operating unit 5 to move can be the superposition of forces in at least two single directions, that is, the operating unit 5 can move linearly in at least two directions. Optionally, the force driving the operating unit 5 to move can also be a combination of linear motion and rotational motion in at least one direction.

[0145] The external force acting on the operating area 51 can be provided by an external tool or by the user directly using their hands or other parts of their body. To facilitate the application of force to the operating area 51, the operating unit 5 is configured to switch the locking component 4 between a locked state and a released state under the action of the external tool 8. The external tool 8 is configured to pass through at least a portion of the receiving cavity 21 to abut against the operating area 51 located within the receiving cavity 21, thereby driving the operating unit 5 to move.

[0146] Specifically, since the operating area 51 is located inside the receiving cavity 21, the external tool 8 extends into the receiving cavity 21 to contact the operating area 51, which is convenient. Furthermore, the connection between the external tool 8 and the cutter head 2 is highly stable. The external tool 8 can rotate to drive the operating part 5 to move, or the external tool 8 can move axially to drive the operating part 5 to move. There will be no relative rotation between the external tool 8 and the cutter head 2, and the external tool 8 will not lose its fit with the cutter head 2. During the process of the external tool 8 driving the operating part 5 to move so that the locking component 4 switches between the locked state and the released state, there will be no contact separation between the external tool 8 and the operating area 51, which ensures the operational stability of unlocking or locking the external tool 8 and improves the efficiency of changing the blade 1 or the blade limiting component 3.

[0147] Specifically, the operating part 5 has a hollow structure and a through hole 54. The through hole 54 extends through the operating part 5 along the axial direction of the cutter head 2, that is, the through hole 54 extends axially. The operating part 5 has at least one protrusion 57 located in the through hole 54, and the operating area 51 is disposed on the protrusion 57. The protrusion 57 is configured to cooperate with an external tool 8 inserted into the through hole 54 so that an external force can be applied to the operating area 51 by the external tool 8; when the locking component 4 is in the released state, under the action of the external tool 8, the blade limiting member 3 can be separated from the cutter head 2 simultaneously by the external tool 8.

[0148] Optionally, one end of the protrusion 57 extends from the operating part 5 towards the centerline of the operating part 5, and two protrusions 57 are provided, which are arranged opposite to each other. The operating area 51 is provided on the two sides of the protrusions 57. The width of the external tool 8 is smaller than the minimum inner diameter of the operating part 5 and larger than the distance between the two protrusions 57. The external tool 8 extends into the receiving cavity 21 and into the through hole 54. The external tool 8 is rotated so that the two sides of the external tool 8 respectively contact one operating area 51 of the two protrusions 57. The external tool 8 continues to rotate, and the external tool 8 applies force to the operating area 51, causing the operating part 5 to rotate, thereby realizing the rotation of the operating part 5 to drive the locking component 4 to switch between the locked state and the released state. Specifically, rotating the external tool 8 in the first direction can realize the locking component 4 to switch from the released state to the locked state, and rotating the external tool 8 in the second direction can realize the locking component 4 to switch from the locked state to the released state. One of the first direction and the second direction is a clockwise direction, and the other is a counterclockwise direction. In this embodiment, the locking component 4 is locked or unlocked by applying a rotational force to drive the operating part 5 to rotate. This method further reduces the risk of the operating area 51 being accidentally triggered and further increases the stability of the cutter head assembly 100.

[0149] Please see Figure 4 and Figure 5 The blade limiting member 3 is at least partially housed in the receiving cavity 21. Specifically, the blade limiting member 3 also includes a mounting portion 30 connected to the blade radial limiting portion 31, which is at least partially housed in the receiving cavity 21. The blade axial limiting portion 32 and the mounting portion 30 are located opposite each other at both ends of the blade radial limiting portion 31. The end of the mounting portion 30 away from the blade radial limiting portion 31 is inserted into the receiving cavity 21 to mount the blade limiting member 3 onto the cutter head 2, improving the connection stability between the blade limiting member 3 and the cutter head 2, thereby ensuring the stability of the blade 1 mounted on the cutter head 2. A second locking portion 42 is provided on the mounting portion 30. Through the cooperation of the first locking portion 41 and the second locking portion 42, the blade limiting member 3 and the blade 1 are stably mounted on the cutter head 2 for cutting operations. In some embodiments, the diameter of the mounting portion 30 near the blade limiting member 3 is larger than the diameter of the mounting portion 3 away from the blade limiting member 3, and the structures of the receiving cavity 21 and the mounting portion 30 are adapted to each other. This arrangement facilitates the removal of the mounting portion 30 from or into the receiving cavity 21.

[0150] In this embodiment, the mounting part 30, the blade radial limiting part 31, and the blade axial limiting part 32 are integrally formed. The blade limiting member 3 is a single component, allowing the user to simultaneously disassemble or install the blade radial limiting part 31 (for radially limiting the blade to the cutter head 2) and the blade axial limiting part 32 (for axially limiting the blade to the cutter head 2) in a single operation, improving replacement efficiency. Furthermore, the integrally formed blade limiting member 3 is simple to manufacture and has high strength. It should be noted that, for ease of description, the blade limiting member 3 will be installed onto the cutter head 2, meaning the mounting part 30 extends into the receiving cavity 21 to connect the blade limiting member 3 to the cutter head 2. In other embodiments, the mounting part 30, the blade radial limiting part 31, and the blade axial limiting part 32 can be connected; the connection method is not specifically limited.

[0151] Please see Figure 4 The locking component 4 is in the locked state, and the blade limiting member 3 is axially limited to the cutter head 2, with a portion of the blade limiting member 3 inserted into the receiving cavity 21. Please refer to... Figure 5 Locking component 4 is in the released state, and blade limiter 3 is in the removable state. Please refer to [link / reference]. Figure 17 The locking component 4 is in the disengaged state, and the blade limiter 3 is completely disengaged from the receiving cavity 21.

[0152] The cutter head assembly 100 also includes an installation channel 36 formed by the cutter head 2 and the blade limiting member 3, the installation channel 36 communicating at least with the lower surface of the cutter head 2. It should be noted that in this embodiment, the blade 1 is installed on the lower surface of the cutter head 2. Therefore, when the blade limiting member 3 is installed on the cutter head 2, the radial limiting portion 31 and the axial limiting portion 32 of the blade are close to the lower surface of the cutter head 2. The installation channel 36 facilitates the removal or installation of the blade limiting member 3 by external tools 8 or manual labor. For example, a tool can be inserted into the installation channel 36, and the blade limiting member 3 can be pulled out of the receiving cavity 21 by magnetic attraction.

[0153] In some embodiments, the blade retainer 3 is recessed inward from its lower surface to form an installation channel 36, which communicates at least with the lower surface of the cutter head 2. An external tool 8 or manual intervention can be inserted from below the cutter head 2 into the installation channel 36 to remove the blade retainer 3 from the cutter head 2 or to install the blade retainer 3 into the receiving cavity 21.

[0154] Optionally, the mounting channel 36 extends through the blade retainer 3 along the axial direction of the blade retainer 3. When the blade retainer 3 is connected to the cutter head 2, the mounting part 30 is inserted into at least a portion of the receiving cavity 21, and the remaining portion of the receiving cavity 21 communicates with the mounting channel 36. Along the axial direction of the cutter head 2, the operating area 51 is positioned above the mounting channel 36, allowing the tool for removing the blade retainer 3 and the tool for applying force to the operating area 51 to be the same tool. In this embodiment, the external tool 8 is inserted into and passes through the mounting channel 36, then contacts the operating area 51 located above the mounting channel 36. The external tool 8 applies force to drive the operating part 5 to move, causing the locking assembly 2 to switch to the released state, and the external tool 8 removes the blade retainer 3 from the cutter head 2. Similarly, the external tool 8 can insert the blade retainer 3 into the receiving cavity 21 and simultaneously apply force to the operating area 51 to switch the locking assembly 2 to the locked state.

[0155] The external tool 8 is configured to be inserted into the mounting channel 36 and the through hole 54 to apply external force to the operating area 51, thereby driving the operating part 5 to move. The external tool 8 can perform unlocking and locking functions, and can also complete the disassembly and installation of the blade limiting member 3. The user can unlock the locking component 4 and disassemble the blade limiting member 3, or install the blade limiting member 3 and lock the locking component 4 by holding the external tool 8 with one hand, while the user can support the blade disc with the other hand, which is convenient for the user to operate and allows the user to complete the replacement of the blade 1 or the blade limiting member 3 by one person. It should be noted that in other embodiments, the external tool may not pass through the mounting channel. When the external tool passes through the receiving cavity and abuts against the operating area, the external tool will magnetically attract the mounting part and the blade limiting member located on one side. The specific cooperation method between the external tool and the blade limiting member is not limited here.

[0156] Please see Figure 6 and Figure 7 The cutter head assembly 100 also includes an anti-detachment structure 81, which is disposed between the blade limiting member 3 and the external tool 8 to increase the connection strength between them. Optionally, the anti-detachment structure 81 can increase the friction between the blade limiting member 3 and the external tool 8 to improve the success rate of simultaneous disassembly of the blade limiting member 3 and the external tool 8 from the cutter head 2. Optionally, the outer periphery of the external tool 8 is provided with at least one concave ring, and a rubber ring or steel ring is installed inside the concave ring. When the external tool 8 penetrates into the blade limiting member 3, the rubber ring or steel ring increases the friction between the external tool 8 and the blade limiting member 3. Optionally, the external tool 8 has magnetic attraction to attract the blade limiting member 3. Optionally, the external tool 8 and the blade limiting member 3 are respectively provided with buckles, and the connection strength between them is improved by the cooperation of the buckles.

[0157] Please see Figure 4 , Figure 5 , Figure 11 and Figure 12 In this embodiment, the operating part 5 and the first locking part 41 are disposed on the cutter head 2, and the second locking part 42 is disposed on the blade limiting member 3. Along the axial direction of the cutter head 2, the operating part 5 has an eccentric ring cross-section. The operating part 5 has two opposing sides, one side being thicker and the other side thinner. The thicker side is the first side 561, and the thinner side is the second side 562. The first side 561 and the second side 562 are disposed opposite each other. The receiving cavity 21 includes a receiving hole 211 for receiving the operating part 5. Along a cross-section perpendicular to the axial direction of the cutter head 2, the receiving hole 211 is an eccentric circle. The receiving hole 211 is formed on a circular mounting member 213, which also includes a thicker third side 214 and a thinner fourth side 215. The operating part 5 rotates within the receiving hole 211, and the outer peripheral surface of the operating part 5 is always in contact with the inner surface of the receiving hole 211. One of the first locking part 41 and the second locking part 42 is a protrusion, and the other of the first locking part 41 and the second locking part 42 is a receiving groove that mates with the protrusion. In this embodiment, the first locking part 41 is a protrusion, and the second locking part 42 is a receiving groove. When the mounting part 30 is inserted into the receiving cavity 21, at least part of the end of the mounting part 30 away from the radial limiting part 31 of the blade extends into the operating part 5, that is, at least part of the operating part 5 is fitted onto the outer periphery of the mounting part 30. The second locking part 42 is a receiving groove formed on the outer periphery of the mounting part 30, and the first locking part 41 is a protrusion formed on the first side part 561, that is, the first side part 561 is provided with a protrusion, and the second side part 561 is not provided with a protrusion.

[0158] Because the blade limiting member 3 can rotate around its own central axis within the receiving cavity 21, in order to ensure the stability of the locking of the first locking part 41 and the second locking part 42, a receiving groove is formed around the mounting part 30 to form a receiving ring. No matter how the blade limiting member 3 rotates within the receiving cavity 21, the first locking part 41 and the second locking part 42 always remain locked. When the operating part 5 and the receiving hole 211 are biased to the same side, that is, the thicker first side 561 is close to the thicker third side 214, and the thinner second side 562 is in contact with the thinner fourth side 215, the protrusion is close to the receiving groove, and the protrusion is at least partially located in the receiving groove, and the locking assembly 4 is in a locked state. When the operating part 5 and the receiving hole 211 are biased to opposite sides, that is, the thicker first side 561 is close to the thinner fourth side 215, and the thinner second side 562 is in contact with the thicker third side 214, the protrusion is away from the receiving groove, the projections of the protrusion and the receiving groove along the axial direction do not overlap, and the locking assembly 4 is in a released state.

[0159] Please see Figure 14The blade limiter 3 and the blade are mounted on the blade disc 2, and the locking assembly 4 is in a locked state. At this time, the operating part 5 and the receiving hole 211 are biased to the same side. Please refer to Figure 15 The external tool 8 passes through the blade stopper 3 and extends into the operating section 5 to engage with the operating area 51. See also... Figure 16 Rotating the external tool 8 causes the operating part 5 to rotate, which in turn causes the first locking part 41 to rotate. When the operating part 5 and the receiving hole 211 are relatively biased to both sides, the locking assembly 4 is in the released state. Please refer to... Figure 17 Apply force to remove the blade limiter 3 and the blade 1 from the cutter head 2, and the locking assembly 4 is in a disengaged state.

[0160] Optionally, the first locking part 41 and the operating part 5 are integrally formed to improve the connection stability between the first locking part 41 and the operating part 5.

[0161] Please see Figure 6 and Figure 7 To ensure smooth installation of the blade retaining member 3 into the receiving cavity 21 and to prevent the first locking part 41 (protrusion) from obstructing the insertion of the blade retaining member 3 within the receiving cavity 21, thus preventing the blade retaining member 3 from being incompletely positioned and resulting in an incorrect locking state, a first guide surface 411 is provided on the first locking part 41, and a second guide surface 37 is provided on the blade retaining member 3. When the blade retaining member 3 is inserted into the receiving cavity 21 and passes through the first locking part 41, the first guide surface 411 and the second guide surface 37 cooperate, allowing the blade retaining member 3 to smoothly pass through the first locking part 41, improving the success rate of locking the blade retaining member 3 onto the cutter head 2. To improve the smoothness of removing the blade retaining member 3 from the cutter head 2, a guide surface can also be provided between the first locking part 41 and the second locking part 42.

[0162] Under external force, the operating part 5 rotates to unlock or lock the locking component 4. To facilitate user operation and avoid wasting time by rotating the operating part 5 multiple times, or causing inconvenience due to unclear rotation angles, the following steps are taken: Optionally, please refer to... Figure 13 The cutter head assembly 100 also includes a stop assembly 55, which includes a first stop 551 disposed on the cutter head 2 and a second stop 552 disposed on the operating part 5. The first stop 551 and the second stop 552 cooperate to limit the rotation of the operating part 5 within a preset angle. The preset angle can be set to any angle within 360°, such as 90°, 180°, 270°, or 360°. In some embodiments, the preset angle can also be set to any angle within 720°, and the specific preset angle can be set according to actual needs.

[0163] In this embodiment, the locking component 4 can be unlocked or locked by rotating the external tool 8 less than 360°. Compared with the prior art, which requires rotating the tool many times to unscrew or tighten the screw, the present disclosure allows for faster replacement of the blade limiter 3 or the blade. For a lawnmower with two blade discs 2 and each blade disc 2 has three blades 1, the time to replace all blades 1 or the blade limiter 3 is only about 1.5 minutes, which greatly shortens the time to replace the blades 1 or the blade limiter 3 and improves the working efficiency of the lawnmower.

[0164] One of the first stop 551 and the second stop 552 is an arc-shaped groove, and the other of the first stop 551 and the second stop 552 is a slider that can slide within the arc-shaped groove. The curvature of the arc-shaped groove defines a preset angle. When the slider slides from one end of the arc-shaped groove to the other end, the slider rotates and moves by a preset angle. Because the slider is mounted on one of the cutter head 2 and the operating part 5, the operating part 5 rotates relative to the cutter head 2 by a preset angle. The stop assembly 55 is not limited to the above structure, and other structures that can limit the rotation of the operating part 5 within the preset angle can also be used. No specific limitation is made here. For example, both the first stop and the second stop are protrusions, two first stops or two second stops are provided, and the two first stops or two second stops are arranged separately to limit the preset angle.

[0165] In this embodiment, the first stop 551 is an arc-shaped groove, and the second stop 552 is a slider. The arc-shaped groove is formed on the cutter head 2, and the slider is formed on the operating part 5. Figure 14 As shown, when the locking component 4 is in the released state, the slider is at one end of the arc-shaped groove. At this time, the slider can only move counterclockwise within the arc. When the operating part 5 rotates counterclockwise until the slider moves to the other end of the arc-shaped groove, the locking component 4 switches to the locked state. That is, when the operating part 5 rotates clockwise, the locking component 4 switches from the locked state to the released state, and when the operating part 5 rotates counterclockwise, the locking component 4 switches from the released state to the locked state.

[0166] Please see Figure 9 and Figure 10The cutter head assembly 100 is installed on a lawnmower for cutting operations. To ensure smooth cutting, the blade limiter 3 and the blade 1 need to be stably mounted on the cutter head 2. However, during operation, the cutter head 2 drives the blade 1 to rotate around the blade radial limiter 31. This means that the blade limiter 3 may rotate slightly within the receiving cavity 21 during cutting. This rotation of the blade limiter 3 may cause the operating part 5 to rotate via the locking assembly 4, potentially causing the locking assembly 4 to switch to the released state, resulting in the blade 1 and the blade limiter 3 falling off, affecting the cutting quality of the lawnmower and user safety. Therefore, the cutter head assembly 100 also includes a limiting structure 43. When the locking assembly 4 is in the locked state, the limiting structure 43 forms a limiting block on the locking assembly 4 to stably maintain the locked state. The limiting structure 43 is used at least to ensure the locking stability between the first locking part 41 and the second locking part 42, effectively preventing the first locking part 41 from moving when the lawnmower is working, causing the locking component 4 to switch to the release state and resulting in the blade limiting part 3 and the blade 1 falling off, ensuring the stability of the lawnmower's operation, and effectively reducing the damage to the user caused by the fallen blade 1.

[0167] Optionally, the limiting structure 43 is configured to switch between a limiting state and an unlocked state when subjected to external force. When the limiting structure 43 is in the limiting state, it forms a limiting block on the locking component 4, keeping it in the locked state. When the limiting structure 43 is in the unlocked state, the locking component 4 can switch between the locked and released states. When it is necessary to replace the blade 1 or the blade limiting member 3, an external force is applied to the limiting structure 43 to switch it to the unlocked state. Under the action of the external tool 8, the operating part 5 drives the first locking part 41 to move and unlock, thereby the external tool 8 removes the blade limiting member 3 from the cutter head 2, and the blade 1 is removed from the end of the mounting part 30 away from the blade radial limiting part 31. When the external tool 8 installs the blade limiting member 3 and the blade 1 onto the cutter head 2, the external tool 8 drives the operating part 5 to rotate, thereby driving the first locking part 41 to move and lock. An external force is applied to the limiting structure 43 to switch it to the locked state, and the locking component 4 remains in the locked state.

[0168] Optionally, the limiting structure 43 includes a blocking part 432 disposed in the switching path of the locking component 4 between the locked state and the released state. The blocking part 432 is configured to prevent the state switching of the locking component 4 when the external force is insufficient, and to allow the locking component 4 to pass over the blocking part 432 to achieve the state switching when the external force is sufficient.

[0169] Specifically, the blocking part 432 is made of elastic material and is configured to deform when subjected to external force. The blocking part 432 is located on the movement path of the locking component 4 for state switching. When sufficient external force is applied to the operating area 51, the operating part 5 moves to drive the blocking part 432 to deform.

[0170] Optionally, the limiting structure 43 further includes a limiting portion 431 provided on the operating part 5. The limiting portion 431 is formed on the operating part 5 and extends outward from the operating part 5.

[0171] like Figure 9 and Figure 10 As shown, the locking component 4 is in a locked state at this time. Due to the presence of the stop component 55, the operating part 5 can only rotate clockwise under the action of the external tool 8. The blocking part 432 is located on the clockwise rotation path of the limiting part 431. The rotation of the operating part 5 requires the limiting part 431 to overcome the resistance of the blocking part 432. Without the action of the external tool 8, the operating part 5 cannot rotate, and the locking component 4 remains in a locked state. This ensures the stability of the blade 1 and the blade limiting part 3 connected to the cutter head 2 during the operation of the lawnmower, effectively preventing the blade 1 or the blade limiting part 3 from falling off under the action of blade rotation.

[0172] When it is necessary to remove the blade retainer 3 from the cutter head 2, the external tool 8 drives the operating unit 5 to rotate clockwise. The movement of the retaining part 431 causes the blocking part 432 to deform. The retaining part 431 passes over the deformed blocking part 432 and continues to rotate until the locking assembly 4 switches to the released state. When it is necessary to lock the blade retainer 3 onto the cutter head 2, the external tool 8 drives the operating unit 5 to rotate counterclockwise. The movement of the retaining part 431 causes the blocking part 432 to deform. The retaining part 431 passes over the deformed blocking part 432 and continues to rotate until the locking assembly 4 switches to the locked state. When replacing blade 1 or blade retainer 3, the user holds the external tool 8 and inserts it into the blade retainer 3 and operating part 5. If rotation is impossible in one direction, the user changes the direction of force and continues rotating. When rotation is no longer possible, the first locking part 41 is in the released position, and force is applied to disengage the external tool 8. At this time, the blade retainer 3 and the external tool 8 disengage simultaneously, allowing replacement of blade retainer 3 or blade 1. Alternatively, the user places the blade retainer 3 onto the external tool 8 and inserts it into the receiving cavity 21. Then, force is applied in the opposite direction of disassembly to rotate the external tool 8. When rotation is no longer possible, the locking assembly 4 switches to the locked state, completing the installation of the blade retainer 3. This installation method is simple and time-saving.

[0173] The blocking part 432 is configured to deform when the external force is greater than 0.5 N·m, which ensures both the comfort of the user during unlocking or installation operations and the stability of the blade limiter 3 mounted on the cutter head 2. The amount of external force required for the blocking part 432 to deform can be set according to actual needs.

[0174] The blocking portion 432 may be formed on the elastic member 58, with the elastic member 58 recessed in the direction of the limiting portion 431 to form the blocking portion 432, or the blocking portion 432 may be a protrusion formed on the elastic member 58. The elastic member 58 is sleeved on at least a portion of the operating portion 5, and the elastic member 58 may be a structure such as an elastic steel wire.

[0175] Please see Figure 4 and Figure 5 The receiving cavity 21 extends axially through the cutter head 2. When the blade limiting member 3 is connected to the cutter head 2, the operating area 51 is located above the blade limiting member 3. The mounting part 30 extends at least partially into the through hole 54 of the operating part 5. The mounting channel 36, the through hole 54, and at least part of the receiving cavity 21 are connected to each other to penetrate the upper and lower surfaces of the cutter head 2. Figure 4 As shown, when the blade limiting member 3 is installed on the cutter head 2, the mounting channel 36, at least a partial through hole 54, and the receiving cavity 21 form a channel that passes through the cutter head 2 axially. When the lawnmower is cutting, grass clippings easily accumulate at the blade mounting location. However, this disclosure provides a channel at the blade mounting location, which allows for quick cleaning of accumulated grass clippings using tools, effectively avoiding the problem of difficulty in disassembly due to grass clipping accumulation.

[0176] As described above, the operating area 51 is located within the receiving cavity 21, and the operating part 5 is also located within the receiving cavity 21. To confine the operating part 5 within the cutter head 2 and prevent it from detaching from the cutter head 2 due to vibration or the action of an external tool 8, the cutter head assembly 100 further includes a retaining member 29 disposed on the cutter head 2. The retaining member 29 is disposed on the side of the operating part 5 away from the blade limiting member 3, and is used to confine the operating part 5 on the cutter head 2. Specifically, the cutter head 2 is provided with an extension 212, which is located at the end of the cutter head 2 near the operating part 5, and extends from the cutter head 2 towards the central axis of the receiving cavity 21. Along the axial direction of the cutter head 2, the retaining member 29 is disposed between the extension 212 and the operating part 5. Under the action of the extension 212, the retaining member 29 is confined within the receiving cavity 21, and under the action of the retaining member 29, the operating part 5 is confined within the receiving cavity 21. Meanwhile, the retaining member 29 is positioned above the elastic member 58 to effectively ensure the stability of the elastic member 58 when it is mounted on the operating part 5.

[0177] In some embodiments, optionally, the structures formed on the cutter head 2 can all be disposed on the insert 25. The receiving cavity 21, the retaining member 29, the elastic member 58, the extension 212, the operating part 5, and the mounting part 30 are disposed on the insert 25. The first stop member 551 is formed on the insert 25, and the circular mounting member 213 is at least a portion of the insert 25. The insert 25 is injection molded onto the cutter head 2. The insert 25 is made of a material with higher hardness to improve its service life and reduce vibration generated by the blade 1 during rotation, resulting in smoother cutting. Please refer to [link to relevant documentation]. Figure 6 and Figure 7 The insert 25 is embeddedly connected to the blade disc 2 to improve the connection stability between the two, preventing the insert 25 from loosening or shifting within the blade disc 2 when the blade 1 rotates at high speed or hits an obstacle, thus improving the safety and durability of the mowing operation.

[0178] In some embodiments, see Figure 2 and Figure 3 The cutter head assembly 100 also includes a protective disc 9, which is located at the bottom of the cutter head 2 and rotatably connected to it. That is, when the cutter head assembly 100 is driven by the drive component, the protective disc 9 is not driven to rotate. When the cutter head assembly 100 is cutting, the protective disc 9 can slide in a translational motion to contact the lawn, thus achieving contact between the protective disc 9 and the lawn. The protective disc 9 can remain stationary or rotate slowly. Located below the cutter head 2, the protective disc 9 blocks or reduces contact between the lawn and the cutter head 2, reducing the frictional resistance of the lawn and the energy loss from the rotation of the cutter head 2, thereby reducing the cutting load and energy consumption, and improving cutting efficiency. Meanwhile, the protective disc 9 can block grass clippings outside the cutter head 2, reducing the amount of grass clippings entering between the cutter head 2 and the blade 1, thus improving cutting ability. In addition, the blade axial limiting part 32 of the blade limiting member 3 does not need to directly contact the obstacle, thus avoiding the blade limiting member 3 from being worn and failing due to the obstacle. The protective disc 9 also increases the installation stability between the blade 1 and the cutter head 2.

[0179] In this embodiment, the blade 1 is positioned on the side of the cutter head 2 facing the protective disc 9, so that the intelligent lawnmower can perform cutting work at the lowest possible cutting height and protect the ground from damage.

[0180] The blade limiting component 3 is located on the side of the cutter head 2 near the protective plate 9. The protective plate 9 has an alignment hole 91. Along the axial direction of the cutter head 2, the projection of the alignment hole 91 can at least partially coincide with the projection of the blade limiting component 3. Specifically, when replacing the blade 1 or the blade limiting component 3, the alignment hole 91 is aligned with the blade limiting component 3, making it convenient for the user to observe and reducing the difficulty of replacing the blade limiting component 3 or the blade 1.

[0181] Optionally, along the axial direction of the cutter head 2, the projection of the aligning hole 91 overlaps the projection of the blade limiting member 3. The size of the aligning hole 91 is greater than or equal to the maximum cross-sectional size of the blade limiting member 3. The blade limiting member 3 can be inserted into the receiving cavity 21 through the aligning hole 91 or removed from the receiving cavity 21 through the aligning hole 91, thereby minimizing the distance between the protective disc 9 and the blade 1 to achieve low-cutting. Specifically, when replacing the blade 1 or the blade limiting member 3, rotate the protective disc 9 or the cutter head 2 to align the aligning hole 91 with the blade limiting member 3. Insert the external tool 8 through the aligning hole 91 into the mounting channel 36 and abut against the operating area 51 to unlock the locking component 4. The blade limiting member 3 and the external tool 8 are simultaneously removed from the cutter head 2 through the aligning hole 91, reducing the difficulty for the user in replacing the blade limiting member 3 or the blade 1. Similarly, after the external tool 8 is inserted into the mounting channel 36, the external tool 8, the blade retainer 3, and the mounting part 30 are installed into the receiving cavity 21 through the mating hole 91 to complete the installation of the blade retainer 3. It should be noted that when the blade retainer 3 is removed or installed through the mating hole 91, the blade 1 can be removed or installed from the gap between the protective disc 9 and the cutter head 2, so that the blade 1 can be replaced even when the size of the mating hole 91 is small.

[0182] When the lawnmower is operating in a commercial setting, a protective disc 9 is typically installed below the blade disc 2. In this embodiment, the external tool 8 extends through the protective disc 9 into the interior of the blade disc 2, effectively preventing the blade disc 2 from rotating due to the external tool 8. Only one operation is needed to align the blade retainer 3 with the corresponding hole 91, allowing the blade 1 or blade retainer 3 to be removed without multiple rotations of the blade disc 2 or the protective disc 9, thus enabling quick replacement of the blade 1 or blade retainer 3. Furthermore, the external tool 8 can unlock or lock with less than one rotation, further accelerating the replacement process.

[0183] Existing methods of replacing blades using screwdrivers or other auxiliary tools make the blade removal and installation highly dependent on these tools and complex to operate. In some embodiments, please refer to... Figures 18 to 21The blade limiting member 3, used to radially limit the blade 1 on the cutter head 2, can be installed on or removed from the cutter head 2, facilitating the replacement of the blade limiting member 3 and preventing the blade 1 from being flung out due to wear caused by the blade limiting member 3 under the action of the blade 1, thus avoiding danger. The removal and installation of the blade limiting member 3 is simple, requiring no other auxiliary tools. The user only needs to apply external force with their fingers to the operating area 51 of the operating part 5, causing the first locking part 41 to move between the locked and released positions. The locking assembly 4 can then switch between the locked and released states, completing the replacement of the blade limiting member 3 and the blade 1. This tool-free, quick replacement of the blade limiting member 3 and the blade 1 is achieved. When the first locking part 41 is in the locked position, the locking assembly 4 is in the locked state; when the first locking part 41 is in the released position, the locking assembly 4 is in the released state.

[0184] Similarly, the cutter head 2 is provided with a receiving cavity 21 that mates with the mounting part 30. The end of the mounting part 30 away from the radial limiting part 31 of the blade is inserted into the receiving cavity 21 to mount the blade limiting member 3 onto the cutter head 2, thereby mounting the blade 1 onto the cutter head 2. A second locking part 42 is provided on the mounting part 30. Through the locking of the first locking part 41 and the second locking part 42, the blade limiting member 3 and the blade 1 are stably mounted on the cutter head 2 for cutting operations. In some embodiments, the diameter of the mounting part 30 near the radial limiting part 31 of the blade is larger than its diameter away from the radial limiting part 31 of the blade, and the structures of the receiving cavity 21 and the mounting part 30 are adapted to each other. This arrangement facilitates the removal of the mounting part 30 from or insertion into the receiving cavity 21.

[0185] Please see Figures 19 to 21 The operating area 51 extends continuously, meaning that external force acts on the operating area 51 in a single direction to drive the operating part 5 to move. There is only one operating area 51 on the operating part 5 for external force to act upon, and the external force applied by the user to this operating area 51 is directed in only one direction. A force in a single direction can trigger the movement of the operating part 5, allowing the user to operate it with just one finger. This operation is simple and requires little operating space. In this embodiment, the operating area 51 is located on the end face of the operating part 5 away from the blade disc 2 or on the side of the operating part 5 opposite to the rotation axis of the blade disc 2. The user can drive the operating part 5 to move by pressing the end face or side of the operating part 5. When this blade disc assembly 100 is installed on the body of the lawnmower, and the operating area 51 is located between the blade disc 2 and the body, the space required to operate the operating part 5 is small, facilitating the layout of the lawnmower.

[0186] In this embodiment, the operating area 51 is located on the end face of the operating part 5 away from the cutter head 2. The operating part 5 is configured to move axially when subjected to an axial force, thereby driving the first locking part 41 to move between a locked position and a released position. The operating area 51 is located on the portion of the operating part 5 that protrudes from the cutter head 2. When the user applies force to the operating area 51, the direction of the force applied to the operating part 5 is at least parallel to the axial direction of the cutter head 2. This configuration makes it convenient and effortless for the user to apply force; that is, the user only needs to press the operating area 51 to drive the operating part 5 to move. It should be noted that the operating area 51 is located on the opposite side of the blade 1. When the user presses the operating area 51, the blade 1 and the blade limiting member 3 can be removed and installed. When the operating area 51 is released, the blade 1 is installed on the cutter head 2 by the blade limiting member 3.

[0187] In some embodiments, the operating part 5 and the first locking part 41 are disposed on the cutter head 2, and the second locking part 42 is disposed on the blade limiting member 3. When the first locking part 41 is in the released position, the locking assembly 4 is in the released state, and the blade limiting member 3 loses its axial limiting constraint and can be separated from the cutter head 2. The second locking part 42 and the blade limiting member 3 can be detached from the cutter head 2, or can be simultaneously installed on the cutter head 2. When the locking assembly 4 is in the separated state, the second locking part 42 and the blade limiting member 3 are simultaneously separated from the cutter head 2, facilitating the replacement of the second locking part 42 and the blade limiting member 3. When the second locking part 42 is a wear-prone structure, the replacement of the second locking part 42 ensures the working stability of the locking assembly 4, thereby ensuring the stability of the blade 1 as it rotates with the cutter head 2.

[0188] In some embodiments, the operating part 5 and the second locking part 42 are disposed on the blade limiting member 3, and the first locking part 41 is disposed on the cutter head 2. When the locking assembly 3 is in the released state, the second locking part 42, the operating part 5 and the blade limiting member 3 can be removed from the cutter head 2 at the same time, which facilitates the replacement of the operating part 5, the second locking part 42 and the blade limiting member 3, and ensures the working stability of the locking assembly 4, thereby ensuring the stability of the blade 1 as it rotates with the cutter head 2.

[0189] In this embodiment, the operating part 5 and the first locking part 41 are disposed on the cutter head 2, and the second locking part 42 is connected to the blade limiting member 3. Specifically, the cutter head 2 is provided with a receiving space 22, and the operating part 5 is movably installed into the receiving space 22. The operating part 5 protrudes at least partially from the cutter head 2 to facilitate the user applying force to the operating area 51. The first locking part 41 is a sphere, and the second locking part 42 is a groove that accommodates at least part of the sphere, the groove being formed on the mounting part 30. When the locking assembly 4 is in the locked state, the sphere is at least partially located within the groove to connect the blade limiting member 3 to the cutter head 2. When the locking assembly 4 is in the released state, the sphere and the groove separate, and the blade limiting member 3 can be detached from the cutter head 2. When the locking assembly 4 is in the disengaged state, the blade limiting member 3 and the cutter head 2 are completely separated.

[0190] Optionally, to ensure smooth locking of the first locking part 41 and the second locking part 42, a recessed ring is formed in the groove of the mounting part 30 extending around the mounting part 30. When the mounting part 30 is inserted into the receiving cavity 21, the first locking part 41 and the second locking part 42 can be locked without rotating the blade limiting member 3, improving operability. At the same time, when the locking assembly 4 is in the locked state, the blade limiting member 3 can rotate relative to the blade disc 2 around its own central axis. The specific effects are as described above and will not be repeated here.

[0191] The cutter head 2 is also provided with a connecting hole 23 that connects the receiving cavity 21 and the accommodating space 22. The first locking part 41 is at least partially located in the connecting hole 23, and the operating part 5 has a slot 52 that mates with at least a portion of the first locking part 41. When the first locking part 41 is in the locked position, the first locking part 41 and the second locking part 42 are locked together. The first locking part 41 and the slot 52 are misaligned, with a portion of the first locking part 41 located in the connecting hole 23 and another portion located in the second locking part 42. The first locking part 41 cannot move toward the direction of the operating part 5.

[0192] When an external force is applied to the operating area 51 to drive the operating part 5 to move within the accommodating space 22, the slot 52 moves toward the direction of the connecting hole 23 and aligns with it. At this time, when force is applied to move the mounting part 30 apart within the receiving cavity 21, the first locking part 41 moves into the slot 52 under the action of the blade limiting member 3, and the blade limiting member 3 can be smoothly separated from the cutter head 2. It should be noted that the first locking part 41 is a sphere, and its smooth surface facilitates rolling within the connecting hole 23, increasing the smoothness of the movement of the first locking part 41 within the connecting hole 23.

[0193] The cutter head assembly 100 also includes a limiting block 26 disposed within the cutter head 2. The operating part 5 is provided with a limiting groove 53 that cooperates with the limiting block 26. The cooperation between the limiting block 26 and the limiting groove 53 allows the operating part 5 to move between a first position and a second position. When the operating part 5 is in the first position, the first locking part 41 is in the locked position. When the operating part 5 is in the second position, the first locking part 41 is in the released position. The cooperation between the limiting block 26 and the limiting groove 53 limits the operating part 5 to the cutter head 2, preventing it from detaching from the cutter head 2 due to vibration or other factors during use, thus increasing the stability of the blade 1 mounted on the cutter head 2.

[0194] Please see Figure 22 The cutter head assembly 100 also includes a reset member 27 connected to the operating part 5. The reset member 27 is configured to apply force to the operating part 5 to keep the first locking part 41 in the locked position. Specifically, when the operating part 5 moves from the first position to the second position, the reset member 27 applies a force to the operating part 5 at least toward the first position. That is, when the operating part 5 moves from the first position to the second position, the reset member 27 stores energy. After the external force is removed, the reset member 27 releases energy to reset and push the operating part 5 back to the first position and keep it in the first position, with the first locking part 41 in the locked position. When no external force is applied, the reset member 27 ensures that the operating part 5 is always in the first position to ensure the stability of the blade 1 connected to the cutter head 2. The reset member 27 can be an elastic structure such as a spring or a spring sheet. Optionally, the reset member 27 is a spring, which is disposed between the operating part 5 and the cutter head 2 and extends axially to store energy when the operating part 5 moves axially from the first position to the second position.

[0195] Please see Figures 19 to 21 The cutter head assembly 100 also includes at least one seal 35, which is disposed between the mounting portion 30 and the cutter head 2. In this embodiment, the mounting portion 30 is provided with a seal 35 above and below the second locking portion 42, respectively, reducing the probability of grass clippings entering the second locking portion 42 during cutting operations. This prevents grass clippings from entering the second locking portion 42 and causing the first locking portion 41 to be unable to switch between the locked and released positions, thereby increasing the service life of the cutter head assembly 100. In addition, the seal 35 also reduces the relative rotation between the mounting portion 30 and the cutter head 2 during cutting operations, thereby reducing wear on the first locking portion 41 and improving its service life. The seal 35 can be a sealing ring fitted on the mounting portion 30 or a gasket disposed between the mounting portion 30 and the cutter head 2. The installation method of the seal 35 is prior art and will not be described in detail here.

[0196] Optionally, a sealing cover 28 connected to the operating part 5 is provided on the outer periphery of the operating part 5. The operating area 51 of the operating part 5, which is subjected to external force, is formed at the end of the sealing cover 28 away from the cutter head 2. The sealing cover 28 increases the area of ​​the operating area 51, improving the user's pressing comfort. The sealing cover 28 is also sealed on the outer periphery of the operating part 5 to seal the gap between the operating part 5 and the cutter head 2, preventing grass clippings and other debris from entering the gap and affecting the smooth movement of the operating part 5. The sealing cover 28 and the operating part 5 are interlocked to increase the stability of their connection and facilitate disassembly and separation, thus facilitating the replacement of either the sealing cover 28 or the operating part 5. Optionally, the sealing cover 28 is made of a flexible material. When the operating part 5 moves from the first position to the second position, the sealing cover 28 deforms; when the operating part 5 moves from the second position to the first position, the sealing cover 28 returns to its original shape. The flexible sealing cover 28 ensures that the gap between the operating part 5 and the cutter head 2 is sealed regardless of whether the operating part 5 is in the first position, the second position, or when it moves between the first position and the second position, thus always preventing grass clippings from entering the gap between the operating part 5 and the cutter head 2.

[0197] Optionally, the receiving cavity 21, the accommodating space 22, the communicating hole 23, and the limiting block 26 are all disposed on the insert 25, which is injection molded onto the cutter head 2. Optionally, the insert 25 is embeddedly connected to the cutter head 2. The insert 25 is made of a material with higher hardness to improve its service life and reduce the vibration generated by the blade 1 during rotation, resulting in smoother cutting.

[0198] In some embodiments, see Figure 23 and Figure 24 The cutter head assembly 100 also includes a protective disc 9, and an operating area 51 is located on the side of the cutter head 2 away from the protective disc 9. The protective disc 9 also has a matching hole 91, which can be aligned with the blade limiting member 3, facilitating user observation and reducing the difficulty of replacing the blade limiting member 3 or the blade 1. Furthermore, the blade limiting member 3 can be inserted into the receiving cavity 21 through the matching hole 91 or removed from the receiving cavity 21 through the matching hole 91, thereby minimizing the distance between the protective disc 9 and the blade 1 to achieve low-cutting. In other embodiments, when the distance between the protective disc 9 and the blade 1 is large, the blade limiting member 3 can be removed from the cutter head 2 between the protective disc 9 and the cutter head 2 or installed onto the cutter head 2.

[0199] It should be noted that when the blade limiting component 3 passes through the mating hole 91 for disassembly or installation, the blade 1 can be disassembled or installed through the gap between the protective disc 9 and the blade disc 2, thus enabling the replacement of the blade 1 even when the size of the mating hole 91 is small. Optionally, the disassembly and installation of the blade limiting component 3 can be performed using tools or by the user using both hands.

[0200] Please see Figures 25 to 28 In some embodiments, the operating part 5 is connected to the blade limiting member 3. When the locking component 4 is in the released state, the second locking part 42, the operating part 5, and the blade limiting member 3 can be simultaneously separated from the cutter head 2. Specifically, the integrally formed blade limiting member 3 has an axially extending mounting cavity 34, which communicates with the outside at the end of the mounting part 30 away from the blade axial limiting part 32. The operating part 5 is at least partially disposed within the mounting cavity 34 and can move axially within the mounting cavity 34. The reset member 27 is disposed within the mounting cavity 34. When the user applies force to the operating area 51 of the operating part 5, the operating part 5 is driven to move from a first position to a second position, and the reset member 27 stores energy. The mounting part 30 is provided with a receiving hole 33, which communicates radially with the outside and the mounting cavity 34, and the second locking part 42 is at least partially located within the receiving hole 33.

[0201] The second locking part 42 is a sphere, and the first locking part 41 is a groove provided on the cutter head 2 and accommodating at least part of the sphere. The groove is formed on the cutter head 2 or the insert 25 and communicates with the receiving cavity 21. Figure 26 As shown, when the locking assembly 4 is in the locked position, the second locking part 42 is at least partially located within the groove to connect the blade retainer 3 to the blade disc 2. Figure 28 As shown, when the locking assembly 4 is in the released state, the second locking part 42 separates from the groove, allowing the blade limiting member 3 to be separated from the cutter head 2. Figure 29 As shown, when the locking component 4 is in the disengaged state, the blade limiter 3 and the operating part 5 are separated from the cutter head 2.

[0202] When the operating part 5 is in the first position, the slot 52 and the receiving hole 33 on the operating part 5 are misaligned. Part of the second locking part 42 is located in the receiving hole 33, and the remaining part is located in the groove. The second locking part 42 cannot enter the slot 52, thus fixing the blade limiting member 3 to the cutter head 2. The user applies force to the operating area 51 of the operating part 5 with one finger, driving the operating part 5 to move to the second position. The slot 52 and the receiving hole 33 are connected, and the second locking part 42 can move from the groove and the receiving hole 33 to the receiving hole 33 and the slot 52. The second locking part 42 is separated from the cutter head 2, and the blade limiting member 3 can be removed from the cutter head 2. This structure has high reliability. When the blade limiting member 3 is worn by the blade 1, the blade limiting member 3, the second locking part 42, and the operating part 5 are replaced synchronously. The second locking part 42 is also replaced synchronously with the blade limiting member 3 after wear, increasing the connection stability between the blade limiting member 3 and the cutter head 2 and effectively reducing the probability of the blade 1 falling off. Optionally, to ensure smooth engagement of the first locking part 41 and the second locking part 42, a groove formed on the cutter head 2 or insert 25 extends around the cutter head 2 or insert 25 to form a concave ring. When the mounting part 30 is inserted into the receiving cavity 21, the engagement of the first locking part 41 and the second locking part 42 can be achieved without rotating the blade limiting member 3, improving operability. At the same time, when the locking assembly 4 is in the locked state, the blade limiting member 3 can rotate relative to the cutter head 2 around its own central axis. The specific effects are as described above and will not be repeated here.

[0203] It should be noted that the diameter of the operating part 5 is matched with the diameter of the mounting cavity 34 to ensure the sealing between the operating part 5 and the mounting part 30, prevent grass clippings from entering the gap between them, and increase the smoothness of pressing the operating part 5.

[0204] Similarly, in this embodiment, a seal 35 is provided between the cutter head 2 and the mounting part 30 to increase the sealing between them, effectively preventing grass clippings from entering the area where the second locking part 42 is located, ensuring the effectiveness of the second locking part 42, and reducing the rotation of the mounting part 30 relative to the cutter head 2, thus reducing the rotational wear of the second locking part 42. The seal 35 can be a sealing ring, which is fitted onto the mounting part 30 or disposed on the cutter head 2. A sealing cover can also be provided on the outer periphery of the operating part 5 to increase the user's pressing comfort. The sealing cover also ensures the sealing between the operating part 5 and the mounting part 30, reducing the entry of grass clippings into the groove and ensuring the effectiveness of the second locking part 42. Obviously, a seal can also be provided between the operating part 5 and the mounting part 30 to further improve the sealing between them. The receiving cavity 21 can be disposed on the insert 25, which is injection molded onto the cutter head 2. Insert 25 is made of a material with higher hardness to improve service life and reduce vibration generated by the blade 1 during rotation, making cutting more stable.

[0205] Please see Figures 29 to 32 The operating part 5 is mounted on the cutter head 2 and is integrally formed with the first locking part 41. The operating part 5 is a spring piece, the first locking part 41 is the end of the spring piece, and the second locking part 42 is a groove that mates with the end. Similarly, to ensure smooth engagement of the first locking part 41 and the second locking part 42, the groove formed on the mounting part 30 extends around the mounting part 30 to form a concave ring. When the mounting part 30 is inserted into the receiving cavity 21, the engagement of the first locking part 41 and the second locking part 42 can be achieved without rotating the blade limiting member 3, thus improving operability. At the same time, when the locking assembly 4 is in the locked state, the blade limiting member 3 can rotate relative to the cutter head 2 around its own central axis. The specific effects are as described above and will not be repeated here.

[0206] The spring plate functions as described above, including the reset element 27, the operating part 5, and the first locking part 41. When the spring plate is in the locked position, at least part of its end extends into the groove of the mounting part 30 to fix the blade limiting member 3 onto the cutter head 2. The operating area 51 is formed on the side of the spring plate opposite to the rotation axis of the cutter head 2. When the user applies force to the operating area 51, the spring plate moves to the release position, separating the end of the spring plate from the groove, allowing the blade limiting member 3 to be separated from the cutter head 2 for easy replacement of the blade limiting member 3 or the blade 1. When the user applies force to move the spring plate from the locked position to the release position, and the mounting part 30 is inserted into the cutter head 2, the user removes the external force, and the spring plate resets to the locked position, with its end extending into the groove to fix the blade limiting member 3 onto the cutter head 2. This structure is simple and low in cost.

[0207] The specific process for disassembling the blade limiting component 3 is as follows: Please refer to... Figure 30 and Figure 31 The user applies pressure by pressing on the operating area 51 of the spring with one finger, moving the spring from the locked position to the released position. Please refer to [link to relevant documentation]. Figure 32 The user applies force to the blade limiting member 3, moving the blade limiting member 3 downwards, thus separating the blade limiting member 3 from the cutter head 2.

[0208] The specific installation process for blade limiter 3 is as follows: Please refer to [link / reference]. Figure 30 and Figure 31 The user applies pressure by pressing on the operating area 51 of the spring with one finger, moving the spring from the locked position to the released position. The user then attaches the blade 1 from the end containing the mounting part 30 to the blade limiting member 3. The mounting part 30 is inserted into the receiving cavity 21. Please refer to [link to relevant documentation]. Figure 32 When the user cancels the force applied to the operating area 51, the spring returns to the locked position, the end of the spring extends into the groove, and the blade limiter 3 is locked onto the blade disc 2.

[0209] In some embodiments, see Figures 1 to 5This disclosure also provides a blade assembly 100 for use in a lawnmower. The blade assembly 100 includes a blade 2, blades 1 mounted on the blade 2, and a blade limiting member 3. The blade limiting member 3 includes a radial limiting portion 31 for radially limiting the blades 1 on the blade 2. The radial direction is as follows: Figure 2 As shown by arrow B in the diagram.

[0210] The cutter head assembly 100 also includes a locking assembly 4, through which the blade 1 is detachably mounted to the cutter head 2. The locking assembly 4 includes a first locking part 41 and a second locking part 42 that can lock into the first locking part 41.

[0211] The locking assembly 4 has a locked state and a released state, and can switch between the two states. When the locking assembly 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the blade 1 is axially confined to the cutter head 2. The blade 1 cannot detach from the cutter head 2 in the axial direction, and the radial limiting part 31 also prevents the blade 1 from detaching radially from the cutter head 2. The blade 1 is connected to the cutter head 2. When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 in the axial direction do not overlap. The blade 1 loses its axial limiting constraint and can be separated from the cutter head 2, facilitating the replacement and maintenance of the blade 1. The axial direction is also the direction of the rotation axis of the cutter head 2. Figure 2 As shown by arrow A in the diagram.

[0212] See Figures 3 to 5 ,and Figure 8 The cutter head assembly 100 also includes an operating part 5 disposed on the locking assembly 4, the operating part 5 including an operating area 51 for external force to be applied. When external force is applied to the operating area 51, the locking assembly 4 switches between a locked state and a released state, thereby realizing the installation and removal of the blade 1.

[0213] Please see Figures 4 to 10The cutter head assembly 100 also includes a receiving cavity 21 disposed within the cutter head 2, and an operating area 51 is housed within the receiving cavity 21. The operating area 51 may not protrude from the surface of the cutter head 2, or the surface of the cutter head 2 may have a component forming at least part of the receiving cavity 21, with the operating area 51 located within that component. This arrangement significantly reduces the risk of the operating area 51 being accidentally triggered. When the cutter head assembly 100 is mounted on the lawnmower body, and the lawnmower is cutting, if the operating area 51 is not located within the receiving cavity 21, branches or other debris in the working area can easily extend into the gap between the cutter head assembly 100 and the body, contacting the operating area 51 and applying force. This can cause the operating part 5 to switch the locking component 4 from a locked state to a released state, causing the blade 1 and blade limiting member 3 to detach, affecting the normal operation of the lawnmower. Furthermore, the fallen blade 1 poses a potential hazard to the user on the lawn. In this embodiment, by placing the operating area 51 inside the cutter head 2, the stability and safety of the cutter head assembly 100 are improved.

[0214] In some embodiments, see Figures 4 to 7 The blade limiting member 3 is detachably mounted on the cutter head 2. When the locking assembly 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the blade limiting member 3 is axially limited to the cutter head 2. When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 along the axial direction do not overlap, and the blade limiting member 3 loses its axial limiting constraint and can be separated from the cutter head 2.

[0215] In some embodiments, see Figure 34 and Figure 35 A radial limiting part 31 for radially limiting the blade 1 to the cutter head 2 is fixed to the cutter head 2. As described above, the radial limiting part 31 and the axial limiting part 32 are separately provided. When the locking assembly 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the axial limiting part 32 is axially limited to the cutter head 2, thereby mounting the blade 1 on the cutter head 2. When the locking assembly 4 is in the released state, the axial projections of the first locking part 41 and the second locking part 42 do not overlap, the axial limiting part 32 loses its axial limiting constraint and can be separated from the cutter head 2, thereby allowing the blade 1 to be separated from the cutter head 2.

[0216] It should be noted that, as Figure 5 and Figure 35 As shown, when the locking component 4 is in the released state, the blade limiting member 3 or the blade axial limiting part 32 only has the conditions to disengage from the cutter head 2, but the blade limiting member 3 or the blade axial limiting part 32 does not disengage from the cutter head 2. The blade limiting member 3 or the blade axial limiting part 32 is still in its position on the cutter head 2. An external force needs to be applied to the blade limiting member 3 or the blade axial limiting part 32 to disengage from the cutter head 2.

[0217] Locking component 4 also has a disengaged state; the released state and the disengaged state of locking component 4 are not the same. When locking component 4 is in the disengaged state, the first locking part 41 and the second locking part 42 are completely separated, and the blade limiting member 3 or the blade axial limiting part 32 is separated from the cutter head 2 in the axial direction, that is, the blade limiting member 3 or the blade axial limiting part 32 is completely disengaged from the cutter head, such as... Figure 17 As shown.

[0218] When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 along the axial direction do not overlap, that is, there is no overlap between their projection areas, including cases where they are completely separated or only tangent or in contact at the edges. Optionally, when the locking assembly 4 is in the released state, the first locking part 41 and the second locking part 42 are radially separated.

[0219] Optionally, the first locking part 41 is disposed on the cutter head 2, and the second locking part 42 is disposed on the blade limiting member 3. This allows the blade limiting member 3 to be directly detached from the cutter head 2 when the locking component 4 is in the unlocked state. The operation is simple and unlocking can be achieved in a single operation. Alternatively, the blade limiting member 3 can be detached from the cutter head 2. The connection relationship between the first locking part 41 and the cutter head, and the connection relationship between the second locking part 42 and the blade limiting member 3, are as described above and will not be repeated here. Optionally, the first locking part 41 can be disposed on the operating part 5, and the second locking part 42 can be disposed on the blade limiting member 3. After unlocking, the operating part 5 can be detached first, and then the blade limiting member 3 can be detached.

[0220] When the locking assembly 4 is in the locked state, the blade limiting member 3 and the cutter head 2 are radially clearance-fitted, allowing the blade limiting member 3 to rotate relative to the cutter head 2 around its own central axis. During use, the rotation of the blade 1 may cause the blade limiting member 3 to rotate relative to the cutter head 2, thereby changing the contact and wear position between the blade 1 and the blade limiting member 3. This avoids concentrated wear on the fixed part, extends the service life of the blade limiting member 3, and prevents the blade 1 from falling off during high-speed rotation, improving the safety and reliability of mowing operations. Furthermore, when assembling or disassembling the blade 1, the blade limiting member 3 can change its contact and wear position with the blade 1, similarly improving the safety and reliability of mowing operations.

[0221] The operating area 51 is configured such that when subjected to external forces from at least two different directions, the operating unit 5 drives the locking component 4 to switch between a locked state and a released state. Foreign objects such as grass clippings, twigs, or stones typically exert a force on the operating area 51 in only one direction during the operation of the cutter head assembly 100, making it difficult to simultaneously satisfy the force conditions from multiple directions. This configuration significantly reduces the probability of the operating area 51 being accidentally triggered. Therefore, the blade limiter 3 can stably maintain the locked state, and the blade 1 will not disengage from the cutter head 2 due to accidental triggering. This not only improves the operational stability of the cutter head assembly 100 but also effectively enhances the safety of the lawnmower during operation.

[0222] Optionally, when the operating area 51 is subjected to a tangential force along the rotation direction of the cutter head 2, the operating part 5 drives the locking component 4 to rotate to achieve state switching. This setting makes the unlocking operation more complex, avoids accidental contact leading to triggering, and further ensures the stability and safety of the cutter head assembly 100 during operation.

[0223] Optionally, the force driving the operating unit 5 to move can be the superposition of forces in at least two single directions, that is, the operating unit 5 can move linearly in at least two directions. Optionally, the force driving the operating unit 5 to move can also be a combination of linear motion and rotational motion in at least one direction.

[0224] Optionally, the cutter head assembly 100 also includes a limiting structure 43. When the locking component 4 is in the locked state, the limiting structure forms a limiting block on the locking component 4 to ensure the stable maintenance of the locked state. The specifics are as described above and will not be repeated here.

[0225] Optionally, the cutter head assembly 100 further includes a stop assembly 55, which includes a first stop 551 disposed on the cutter head 2 and a second stop 552 disposed on the operating part 5. The first stop 551 and the second stop 552 cooperate to limit the rotation of the operating part 5 within a preset angle. The specifics are as described above and will not be repeated here.

[0226] The assembly relationship of the operating unit 5, locking component 4, blade limiter 3, cutter head 2 and blade 1, the specific structure of each component, the state switching achieved by the cooperation of locking component 4 and operating unit 5, and how the external tool 8 operates to change the blade and blade limiter 3, etc., have been described above and will not be repeated here.

[0227] In some embodiments, see Figures 1 to 5 This disclosure also provides a blade assembly 100 for use in a lawnmower. The blade assembly 100 includes a blade 2, blades 1 mounted on the blade 2, and a blade limiting member 3 detachably mounted on the blade 2. The blade limiting member 3 includes a radial limiting portion 31 for radially limiting the blades 1 on the blade 2. The radial direction is as follows: Figure 2 As shown by arrow B in the diagram.

[0228] The blade retainer 3 is radially clearance-fitted with the cutter head 2, allowing the blade retainer 3 to rotate relative to the cutter head 2 around its own central axis. During use, the rotation of the blade 1 may cause the blade retainer 3 to rotate relative to the cutter head 2, thereby changing the contact and wear position between the blade 1 and the blade retainer 3. This avoids concentrated wear on the fixed part, extends the service life of the blade retainer 3, and prevents the blade 1 from falling off during high-speed rotation, improving the safety and reliability of mowing operations. Furthermore, by assembling and disassembling the blade 1, the blade retainer 3 can change its contact and wear position with the blade 1, similarly improving the safety and reliability of mowing operations.

[0229] The cutter head assembly 100 also includes a locking assembly 4, through which the blade limiting member 3 is detachably mounted to the cutter head 2. The locking assembly 4 includes a first locking part 41 and a second locking part 42 that can lock into the first locking part 41.

[0230] The locking component 4 has a locked state and a released state, and can switch between the two states. When the locking component 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the blade limiting member 3 is axially limited to the cutter head 2, preventing it from detaching from the cutter head 2 in the axial direction. When the locking component 4 is in the released state, the axial projections of the first locking part 41 and the second locking part 42 do not overlap, and the blade limiting member 3 loses its axial limiting constraint and can be separated from the cutter head 2, facilitating the replacement and maintenance of the blade limiting member 3 and the blade 1. The axial direction is also the direction of the rotation axis of the cutter head 2, such as... Figure 2 As shown by arrow A in the diagram.

[0231] It should be noted that when the locking component 4 is in the released state, the blade limiter 3 only has the conditions to disengage from the cutter head 2, but the blade limiter 3 does not disengage from the cutter head 2. The blade limiter 3 remains in its position on the cutter head 2, and an external force is required to act on the blade limiter 3 to make the blade limiter 3 disengage from the cutter head 2.

[0232] The locking component 4 also has a separated state, and the released state and the separated state of the locking component 4 are not the same. When the locking component 4 is in the separated state, the first locking part 41 and the second locking part 42 are completely separated, and the blade limiting member 3 is separated from the cutter head 2 in the axial direction, that is, the blade limiting member 3 is completely detached from the cutter head.

[0233] When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 along the axial direction do not overlap, that is, there is no overlap between their projection areas, including cases where they are completely separated or only tangent or in contact at the edges. Optionally, when the locking assembly 4 is in the released state, the first locking part 41 and the second locking part 42 are radially separated.

[0234] See Figures 3 to 5 ,and Figure 8 The cutter head assembly 100 also includes an operating part 5 disposed on the locking assembly 4, the operating part 5 including an operating area 51 for external force to be applied. When external force is applied to the operating area 51, the locking assembly 4 switches between a locked state and a released state, thereby realizing the installation and removal of the blade 1 and the blade limiting member 3.

[0235] Please see Figures 4 to 10 The cutter head assembly 100 also includes a receiving cavity 21 disposed within the cutter head 2, and an operating area 51 is housed within the receiving cavity 21. The operating area 51 may not protrude from the surface of the cutter head 2, or the surface of the cutter head 2 may have a component forming at least part of the receiving cavity 21, with the operating area 51 located within that component. This arrangement significantly reduces the risk of the operating area 51 being accidentally triggered. When the cutter head assembly 100 is mounted on the lawnmower body, and the lawnmower is cutting, if the operating area 51 is not located within the receiving cavity 21, branches or other debris in the working area can easily extend into the gap between the cutter head assembly 100 and the body, contacting the operating area 51 and applying force. This can cause the operating part 5 to switch the locking component 4 from a locked state to a released state, causing the blade 1 and blade limiting member 3 to detach, affecting the normal operation of the lawnmower. Furthermore, the fallen blade 1 poses a potential hazard to the user on the lawn. In this embodiment, by placing the operating area 51 inside the cutter head 2, the stability and safety of the cutter head assembly 100 are improved.

[0236] Optionally, the first locking part 41 is disposed on the cutter head 2, and the second locking part 42 is disposed on the blade limiting member 3, so that when the locking component 4 is in the unlocked state, the blade limiting member 3 can be directly removed from the cutter head 2, which is simple to operate. The connection relationship between the first locking part 41 and the cutter head, and the connection relationship between the second locking part 42 and the blade limiting member 3 are as described above, and will not be repeated here. Optionally, the first locking part 41 can be disposed on the operating part 5, and the second locking part 42 can be disposed on the blade limiting member 3.

[0237] The operating area 51 is configured such that when subjected to external forces from at least two different directions, the operating unit 5 drives the locking component 4 to switch between a locked state and a released state. Foreign objects such as grass clippings, twigs, or stones typically exert a force on the operating area 51 in only one direction during the operation of the cutter head assembly 100, making it difficult to simultaneously satisfy the force conditions from multiple directions. This configuration significantly reduces the probability of the operating area 51 being accidentally triggered. Therefore, the blade limiter 3 can stably maintain the locked state, and the blade 1 will not disengage from the cutter head 2 due to accidental triggering. This not only improves the operational stability of the cutter head assembly 100 but also effectively enhances the safety of the lawnmower during operation.

[0238] Optionally, when the operating area 51 is subjected to a tangential force along the rotation direction of the cutter head 2, the operating part 5 drives the locking component 4 to rotate to achieve state switching. This setting makes the unlocking operation more complex, avoids accidental contact leading to triggering, and further ensures the stability and safety of the cutter head assembly 100 during operation.

[0239] Optionally, the force driving the operating unit 5 to move can be the superposition of forces in at least two single directions, that is, the operating unit 5 can move linearly in at least two directions. Optionally, the force driving the operating unit 5 to move can also be a combination of linear motion and rotational motion in at least one direction.

[0240] The assembly relationship of the operating unit 5, locking component 4, blade limiter 3, cutter head 2 and blade 1, the specific structure of each component, the state switching achieved by the cooperation of locking component 4 and operating unit 5, and how the external tool 8 operates to change the blade and blade limiter 3, etc., have been described above and will not be repeated here.

[0241] In some embodiments, see Figures 1 to 5 This disclosure also provides a blade assembly 100 for use in a lawnmower. The blade assembly 100 includes a blade 2, blades 1 mounted on the blade 2, and a blade limiting member 3 detachably mounted on the blade 2. The blade limiting member 3 includes a radial limiting portion 31 for radially limiting the blades 1 on the blade 2. The radial direction is as follows: Figure 2 As shown by arrow B in the diagram.

[0242] The cutter head assembly 100 also includes a locking assembly 4, through which the blade limiting member 3 is detachably mounted to the cutter head 2. The locking assembly 4 includes a first locking part 41 and a second locking part 42 that can lock into the first locking part 41.

[0243] The locking component 4 has a locked state and a released state, and can switch between the two states. When the locking component 4 is in the locked state, the first locking part 41 and the second locking part 42 are locked together, and the blade limiting member 3 is axially limited to the cutter head 2, preventing it from detaching from the cutter head 2 in the axial direction. When the locking component 4 is in the released state, the axial projections of the first locking part 41 and the second locking part 42 do not overlap, and the blade limiting member 3 loses its axial limiting constraint and can be separated from the cutter head 2, facilitating the replacement and maintenance of the blade limiting member 3 and the blade 1. The axial direction is also the direction of the rotation axis of the cutter head 2, such as... Figure 2 As shown by arrow A in the diagram.

[0244] It should be noted that when the locking component 4 is in the released state, the blade limiter 3 only has the conditions to disengage from the cutter head 2, but the blade limiter 3 does not disengage from the cutter head 2. The blade limiter 3 remains in its position on the cutter head 2, and an external force is required to act on the blade limiter 3 to make the blade limiter 3 disengage from the cutter head 2.

[0245] Locking component 4 also has a separated state. When locking component 4 is in the separated state, the first locking part 41 and the second locking part 42 are completely separated, and the blade limiting member 3 is separated from the cutter head 2 in the axial direction, that is, the blade limiting member 3 is completely separated from the cutter head.

[0246] When the locking assembly 4 is in the released state, the projections of the first locking part 41 and the second locking part 42 along the axial direction do not overlap, that is, there is no overlap between their projection areas, including cases where they are completely separated or only tangent or in contact at the edges. Optionally, when the locking assembly 4 is in the released state, the first locking part 41 and the second locking part 42 are radially separated.

[0247] See Figures 3 to 5 ,and Figure 8 The cutter head assembly 100 also includes an operating part 5 disposed on the locking assembly 4. The operating part 5 includes an operating area 51 for external force application. The operating area 51 is configured such that when subjected to a tangential force along the rotation direction of the cutter head 2, the operating part 5 drives the locking assembly 4 to rotate to switch between a locked state and a released state, thereby realizing the installation and removal of the blade 1 and the blade limiting member 3. This configuration makes the unlocking operation complex, avoids accidental contact leading to triggering, and further ensures the stability and safety of the cutter head assembly 100 during operation.

[0248] Please see Figures 4 to 10The cutter head assembly 100 also includes a receiving cavity 21 disposed within the cutter head 2, and an operating area 51 is housed within the receiving cavity 21. The operating area 51 may not protrude from the surface of the cutter head 2, or the surface of the cutter head 2 may have a component forming at least part of the receiving cavity 21, with the operating area 51 located within that component. This arrangement significantly reduces the risk of the operating area 51 being accidentally triggered. When the cutter head assembly 100 is mounted on the lawnmower body, and the lawnmower is cutting, if the operating area 51 is not located within the receiving cavity 21, branches or other debris in the working area can easily extend into the gap between the cutter head assembly 100 and the body, contacting the operating area 51 and applying force. This can cause the operating part 5 to switch the locking component 4 from a locked state to a released state, causing the blade 1 and blade limiting member 3 to detach, affecting the normal operation of the lawnmower. Furthermore, the fallen blade 1 poses a potential hazard to the user on the lawn. In this embodiment, by placing the operating area 51 inside the cutter head 2, the stability and safety of the cutter head assembly 100 are improved.

[0249] Optionally, the first locking part 41 is disposed on the cutter head 2, and the second locking part 42 is disposed on the blade limiting member 3, so that when the locking component 4 is in the unlocked state, the blade limiting member 3 can be directly removed from the cutter head 2, which is simple to operate. The connection relationship between the first locking part 41 and the cutter head, and the connection relationship between the second locking part 42 and the blade limiting member 3 are as described above, and will not be repeated here. Optionally, the first locking part 41 can be disposed on the operating part 5, and the second locking part 42 can be disposed on the blade limiting member 3.

[0250] When the locking assembly 4 is in the locked state, the blade limiting member 3 and the cutter head 2 are radially clearance-fitted, allowing the blade limiting member 3 to rotate relative to the cutter head 2 around its own central axis. During use, the rotation of the blade 1 may cause the blade limiting member 3 to rotate relative to the cutter head 2, thereby changing the contact and wear position between the blade 1 and the blade limiting member 3. This avoids concentrated wear on the fixed part, extends the service life of the blade limiting member 3, and prevents the blade 1 from falling off during high-speed rotation, improving the safety and reliability of mowing operations. Furthermore, when assembling or disassembling the blade 1, the blade limiting member 3 can change its contact and wear position with the blade 1, similarly improving the safety and reliability of mowing operations.

[0251] The assembly relationship of the operating unit 5, locking component 4, blade limiter 3, cutter head 2 and blade 1, the specific structure of each component, the state switching achieved by the cooperation of locking component 4 and operating unit 5, and how the external tool 8 operates to change the blade and blade limiter 3, etc., have been described above and will not be repeated here.

[0252] 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.

[0253] Please see Figure 33 The 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 move the body 6 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. The structure of the moving component 7 is prior art and will not be described in detail here.

[0254] 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 prior art 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. The blade assembly 100 is the blade assembly 100 shown in any of the above embodiments, and its specific structure will not be described in detail.

[0255] This intelligent lawnmower 200 is used in commercial settings for mowing lawns such as golf courses or large lawns. When mowing such lawns, the intelligent lawnmower 200 travels at a relatively high speed, greater than or equal to 0.8 m / s. To avoid missing any sections, the blade assembly 100 rotates at a high speed, exceeding 2000 rpm / min. Optionally, the blade assembly 100 can rotate at 3600 rpm / min. In commercial settings, given the long working hours, high rotational speed of the blade assembly 100, and fast travel speed, the accumulated rotations of the blade assembly 100 within a short period are significant. Therefore, it is necessary to replace the blade limiting component 3, which radially restricts the blade 1 onto the blade disc 2, promptly. In this embodiment, the blade limiting component 3 can be removed from the blade disc 2 for replacement, ensuring the safety of the intelligent lawnmower 200.

[0256] The intelligent lawnmower 200 also includes an energy module (not shown) for providing power for various operations of the intelligent lawnmower 200, a control device installed on the body 6, a positioning device (not shown) set on the body 6, and other devices that enable the intelligent lawnmower 200 to move and work autonomously, which will not be listed here.

[0257] Please see Figures 1 to 32 This disclosure also provides a blade mounting structure 300 for limiting a blade 1 on a cutter head 2. The mounting structure 300 includes a blade limiting member 3, which is detachably mounted to the cutter head 2. The blade limiting member 3 is detachably mounted to the cutter head 2 via a locking assembly 4, and the locking and releasing of the locking assembly 4 are achieved by force applied to the operating part 5.

[0258] The assembly relationship of the operating unit 5, locking component 4, blade limiter 3, cutter head 2 and blade 1, the specific structure of each component, the state switching achieved by the cooperation of locking component 4 and operating unit 5, and how the external tool 8 operates to change the blade and blade limiter 3, etc., have been described above and will not be repeated here.

[0259] 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.

Claims

1. A blade assembly for use in a lawnmower, characterized in that, The cutter head assembly (100) includes: Cutter head (2); Blade (1), mounted on the cutter head (2); The blade limiting member (3) is detachably installed on the cutter head (2) and includes a blade radial limiting part (31), which is used to limit the blade (1) radially on the cutter head (2). Locking component (4), including: A first locking part (41) is disposed on the cutter head (2); The second locking part (42) is provided on the blade limiting member (3), and the second locking part (42) can lock and cooperate with the first locking part (41); An operating unit (5) is provided on the locking assembly (4) and includes an operating area (51) for external force application; in: When an external force is applied to the operating area (51), the locking component (4) switches between a locked state and a released state; When the locking component (4) is in the locked state, the first locking part (41) and the second locking part (42) are locked together, and the blade limiting member (3) is axially limited to the cutter head (2); When the locking component (4) is in the released state, the projections of the first locking part (41) and the second locking part (42) along the axial direction do not overlap, and the blade limiting member (3) loses its axial limiting constraint and can be separated from the cutter head (2).

2. The cutter head assembly as described in claim 1, characterized in that, The cutter head assembly (100) further includes a receiving cavity (21) disposed on the cutter head (2), and the operating area (51) is received in the receiving cavity (21).

3. The cutter head assembly as described in claim 1, characterized in that, The operating area (51) is configured such that when subjected to external forces in at least two different directions, the operating part (5) drives the locking component (4) to switch between a locked state and a released state.

4. The cutter head assembly as described in claim 1 or 3, characterized in that, When the operating area (51) is subjected to a tangential force along the rotation direction of the cutter head (2), the operating part (5) drives the locking component (4) to rotate to achieve state switching.

5. The cutter head assembly as described in claim 4, characterized in that, The cutter head assembly (100) further includes a stop assembly (55), which includes a first stop (551) disposed on the cutter head (2) and a second stop (552) disposed on the operating part (5). The first stop (551) and the second stop (552) cooperate to restrict the operating part (5) from rotating within a preset angle.

6. The cutter head assembly as claimed in claim 1, characterized in that, The cutter head assembly (100) also includes a limiting structure (43). When the locking component (4) is in a locked state, the limiting structure forms a limiting block on the locking component (4) to keep the locked state stable.

7. The cutter head assembly as claimed in claim 1, characterized in that, The locking component (4) also has a separated state. When the locking component (4) is in the separated state, the blade limiting member (3) is separated from the cutter head (2) in the axial direction.

8. The cutter head assembly as claimed in claim 1, characterized in that, When the locking component (4) is in the locked state, the blade limiting component (3) can rotate relative to the cutter head (2) around its own central axis.

9. A blade assembly for use in a lawnmower, characterized in that, The cutter head assembly (100) includes: Cutter head (2); Blade (1), mounted on the cutter head (2); The blade limiting member (3) includes a blade radial limiting part (31), which is used to limit the blade (1) radially to the cutter head (2); A locking component (4) is disposed on the cutter head assembly (100), including a first locking part (41) and a second locking part (42) that can lock and engage with the first locking part (41); An operating unit (5) is provided on the locking assembly (4) and includes an operating area (51) for external force application; in: When an external force is applied to the operating area (51), the locking component (4) switches between a locked state and a released state; When the locking component (4) is in the locked state, the first locking part (41) and the second locking part (42) are locked together, and the blade (1) is axially limited to the cutter head (2); When the locking component (4) is in the released state, the projections of the first locking part (41) and the second locking part (42) along the axial direction do not overlap, and the blade (1) loses the axial limiting constraint and can be separated from the cutter head (2); The cutter head (2) is provided with a receiving cavity (21), and the operating area (51) is received in the receiving cavity (21).

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 8, or the cutter head assembly (100) as described in claim 9.

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