A cutting assembly for a string trimmer and a string trimmer

Abstract

The utility model belongs to the technical field of garden tools, concretely relates to a cutting assembly and a grass trimmer of grass trimmer, including base, replaceable assembly includes cutting part and holding part, the buckle spare is established between holding part with base, the buckle spare includes press part, the buckle spare is configured as when holding part with base is mutually separated along the assembly direction makes press part always be exposed. The utility model discloses the cutting assembly is designed as the combination structure of base and replaceable assembly, has realized the technical effect that the same grass trimmer can replace flexible rope or rigid blade different cutting part, has reduced garden maintenance cost significantly, has promoted the flexibility and operation efficiency of tool use, satisfies the diversified vegetation pruning demand. The utility model discloses the structure design of buckle spare is optimized, makes press part always be in the exposed state in the process of dismounting, and this improvement has promoted the dismounting efficiency significantly, has reduced the operation complexity.

Description

Technical Field

[0001] This utility model belongs to the field of garden tool technology, specifically relating to a cutting component of a lawn mower and a lawn mower. Background Technology

[0002] A lawnmower is a gardening tool used to trim lawns, weeds, or vegetation. Its main purpose is to maintain a neat and attractive lawn, promote healthy turf growth, and clear weeds to prevent their excessive spread. Different types of cutting parts are required for different vegetation types. For example, soft ropes can be used as cutting parts to clear fine weeds, while rigid blades are needed to clear thicker weeds. However, most lawnmowers only come with one type of cutting part, requiring users to have multiple different types of lawnmowers to clear different types of vegetation, increasing garden maintenance costs. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a cutting component and a grass cutter that can adapt to different working scenarios.

[0004] To achieve the above and other related objectives, this utility model provides a cutting component for a lawn mower, comprising:

[0005] A base, wherein the base is provided with a connecting part for connecting the output shaft of the drive device;

[0006] Replaceable components include a cutting component and a retaining component, the retaining component being mounted to the base along the axial direction of the base, and the retaining component being configured to restrict the cutting component on the base;

[0007] A latching element is provided between the retaining member and the base, the latching element being configured to limit at least axial displacement between the retaining member and the base.

[0008] In an optional embodiment of the present invention, the fastener includes a pressing portion, which is configured to release the axial displacement restriction between the retaining member and the base when subjected to an external force, and the fastener is configured to keep the pressing portion exposed when the retaining member and the base are separated from each other along the assembly direction.

[0009] In an optional embodiment of this utility model, the fastening member includes a plug and a slot that are inserted and engaged along the axial direction of the base. The sidewalls of the plug and the slot are provided with engaging portions that engage with each other. The engaging portions are configured to engage with each other to prevent the plug and the slot from separating when the plug and the slot are inserted. The plug is made of an elastic material. The pressing portion is disposed on the plug. The plug is configured to separate the engaging portions when the pressing portion is subjected to an external force. One of the plug and the slot is located on the base, and the other is located on the retaining member.

[0010] In an optional embodiment of the present invention, the slot is disposed on the outer peripheral surface of the base or the retaining member, and the slot opening extends along the outer peripheral surface of the base or the retaining member to at least a first end of the base or the retaining member, wherein the first end is an end of the base facing the retaining member or an end of the retaining member facing the base.

[0011] In an optional embodiment of this utility model, the cutting component includes a winding roller and a flexible rope, the base defines a cavity for accommodating the winding roller, one end of the flexible rope is wound on the winding roller, and a wire-passing hole is provided on the side wall of the cavity for the other end of the flexible rope to pass through; the cavity has an opening at one end away from the connecting portion, and the retaining component includes a first end cap, which is connected to the base and closes the opening.

[0012] In an optional embodiment of this utility model, the base or the first end cap is provided with a first counterweight, and the center of gravity of the first counterweight is located on the side of the base axis away from the wire hole.

[0013] In an optional embodiment of this utility model, the edge of the wire hole is provided with a guide ring made of wear-resistant material.

[0014] In an optional embodiment of this utility model, a guide post is provided in the cavity, and the winding roller is loosely fitted on the guide post; an annular rib is provided at one end of the first end cap facing the winding roller, and the annular rib is arranged coaxially with the winding roller.

[0015] In an optional embodiment of the present invention, the cutting component includes a blade, the retaining component includes a second end cap, the blade is mounted on the second end cap, and at least two blades are evenly spaced along the circumference of the second end cap.

[0016] In an optional embodiment of this utility model, the base defines a cavity for accommodating a winding roller, the cavity having an opening at one end away from the connecting portion, and a second end cap being installed at the opening; the side wall of the cavity has a thread-passing hole for a flexible rope to pass through; the base has a first counterweight, the center of gravity of which is located on the side of the base axis away from the thread-passing hole; the second end cap has a second counterweight, the center of gravity of which is located on the side of the base axis closer to the thread-passing hole.

[0017] In an optional embodiment of this utility model, the second end cap is provided with a mounting post made of wear-resistant material, and the blade is detachably connected to the mounting post.

[0018] In an optional embodiment of this utility model, the mounting post includes a large-diameter portion and a small-diameter portion, the blade is provided with a mounting hole, the mounting hole includes a first region and a second region, the width of the first region is greater than the diameter of the large-diameter portion, the width of the second region is less than the diameter of the large-diameter portion but greater than the diameter of the small-diameter portion, and a neck is provided between the first region and the second region, the width of the neck is less than the diameter of the small-diameter portion.

[0019] In an optional embodiment of this utility model, the base is provided with blades at one end facing the driving device, and a plurality of blades are evenly spaced along the circumference of the base.

[0020] In an optional embodiment of the present invention, the connecting portion includes an annular insert, the inner diameter of which is configured to allow interference fit with the output shaft of the drive device.

[0021] To achieve the above and other related objectives, this utility model also provides a lawn mower, comprising:

[0022] Handle assembly;

[0023] A head assembly connected to the handle assembly, the head assembly including a drive unit and a cutting assembly;

[0024] The cutting assembly includes a base and a replaceable component;

[0025] The base is provided with a connecting part, which is used to connect the output shaft of the drive device;

[0026] The replaceable component includes a cutting component and a retaining component, the retaining component being mounted to the base along the axial direction of the base, and the retaining component being configured to restrict the cutting component on the base;

[0027] A latching element is provided between the retaining member and the base, and the latching element is configured to limit at least axial displacement between the retaining member and the base;

[0028] The fastener includes a pressing portion configured to release the axial displacement restriction between the retaining member and the base when subjected to an external force, and the fastener is configured to always expose the pressing portion when the retaining member and the base are separated from each other in the assembly direction.

[0029] The technical advantages of this invention are as follows: By designing the cutting component as a combination of a base and replaceable components, this invention enables the quick replacement of different cutting parts, such as flexible ropes or rigid blades, on the same lawnmower. This solves the compatibility problem caused by the fixed single cutting component in traditional lawnmowers. Users do not need to purchase multiple machines to handle different operating scenarios, such as soft weeds and robust vegetation, significantly reducing garden maintenance costs. At the same time, the modular design improves the flexibility and efficiency of tool use, meeting diverse vegetation trimming needs. In addition, by optimizing the structural design of the buckle, this invention ensures that the pressing part remains exposed during disassembly. Operators can directly separate the cutting head from the base without loosening the buckle, effectively solving the problem of secondary pressing caused by the easy reset of traditional buckles. This improvement significantly increases disassembly efficiency, reduces operational complexity, maintains the reliability of the buckle connection, and achieves the convenience of one-handed operation, making it particularly suitable for operating scenarios that require frequent cutting head replacement. Attached Figure Description

[0030] Figure 1 This is a perspective view of one usage state of the lawn mower provided in an embodiment of the present utility model;

[0031] Figure 2 This is a perspective view of another usage state of the lawn mower provided in an embodiment of this utility model;

[0032] Figure 3 This is an assembly diagram of the cutting assembly and driving device provided in an embodiment of this utility model;

[0033] Figure 4 This is a perspective view of one state of the cutting assembly provided in an embodiment of this utility model;

[0034] Figure 5 This is a perspective view of the base provided in an embodiment of this utility model;

[0035] Figure 6 This is an exploded view of one state of the cutting assembly provided in an embodiment of this utility model;

[0036] Figure 7 This is an end view of one state of the cutting assembly provided in an embodiment of this utility model;

[0037] Figure 8 yes Figure 7 AA section view;

[0038] Figure 9 yes Figure 7 BB section view;

[0039] Figure 10 This is a perspective view of another state of the cutting component provided in an embodiment of this utility model;

[0040] Figure 11 This is an exploded view of another state of the cutting assembly provided in an embodiment of this utility model;

[0041] Figure 12 This is an end view of another state of the cutting assembly provided in an embodiment of this utility model;

[0042] Figure 13 yes Figure 12 CC section view;

[0043] Figure 14 yes Figure 12 DD sectional view. Detailed Implementation

[0044] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0045] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Please see Figure 1 , 2As shown, an embodiment of this utility model provides a lawn mower, which includes a handle assembly 200 and a head assembly 100. The head assembly 100 is connected to the handle assembly 200 and is used to perform mowing actions. The handle assembly 200 constitutes the part of the lawn mower that is operated by the user. The user can control the range of motion and trajectory of the head assembly 100 through the handle assembly 200. In some embodiments, in addition to a handle for holding, the handle assembly 200 may also be equipped with a switch assembly to control the start / stop, speed, etc. of the head assembly 100. A battery pack may also be provided on the handle assembly 200 to power the head assembly 100. In addition, to facilitate the user to perform mowing actions in a standing position, the handle assembly 200 may also include an extension rod, which may be configured as a telescopic or detachable structure. The head assembly 100 includes a drive unit 10 and a cutting assembly 20. The cutting assembly 20 can be replaced with different types of cutting parts (such as a flexible rope 231 or a blade 242) to adapt to different working environments. The drive unit 10 is used to drive the cutting assembly 20 to rotate, and the drive unit 10 can be, for example, a motor or a motor reducer assembly. It should be understood that the specific structure of the handle assembly 200 is not particularly limited, and this utility model is an improvement on the head assembly 100, specifically an improvement on the cutting assembly 20. Therefore, other details of the handle assembly 200 will not be repeated. The cutting assembly 20 will be described in detail below with reference to specific embodiments.

[0047] Please see Figure 3-14As shown, the cutting assembly 20 provided by this utility model includes a base 21 and a replaceable assembly 20'. The base 21 is provided with a connecting part 211, which is used to connect the output shaft of the drive device 10. The replaceable assembly 20' includes a cutting component and a holding component. The holding component is assembled to the base 21 along the axial direction of the base 21 and is configured to restrict the cutting component on the base 21. A latching member is provided between the holding component and the base 21. The latching member is configured to restrict at least axial displacement between the holding component and the base 21. The latching member includes a pressing part 2011. The pressing part 2011 is configured to release the restriction of axial displacement between the holding component and the base 21 when it is subjected to an external force. The latching member is configured to keep the pressing part 2011 exposed when the holding component and the base 21 are separated from each other in the assembly direction. This invention, by designing the cutting component 20 as a combination of the base 21 and the replaceable component 20', achieves the technical effect of quickly replacing different cutting parts such as the flexible rope 231 or the rigid blade 242 on the same lawnmower. This solves the model compatibility problem caused by the fixed single cutting component in traditional lawnmowers. Users do not need to purchase multiple machines to handle different operating scenarios such as fine weeds and robust vegetation, significantly reducing garden maintenance costs. Simultaneously, the modular design improves the flexibility and efficiency of tool use, meeting diverse vegetation pruning needs. Furthermore, by optimizing the structural design of the buckle, this invention ensures that the pressing part 2011 remains exposed during disassembly. Operators can directly separate the replaceable component 20' from the base 21 without loosening the buckle, effectively solving the problem of secondary pressing caused by the easy reset of traditional buckles. This improvement significantly enhances disassembly efficiency, reduces operational complexity, maintains the reliability of the buckle connection, and achieves convenient one-handed operation, making it particularly suitable for operating scenarios requiring frequent cutting head changes.

[0048] Example 1

[0049] Please see Figure 3-9As shown, this embodiment illustrates the technical solution of this utility model with the flexible rope 231 as the cutting component. In this embodiment, the cutting component includes a winding roller 23 and a flexible rope 231. The base 21 defines a cavity 215 for accommodating the winding roller 23. One end of the flexible rope 231 is wound around the winding roller 23, and a thread-passing hole 212 is provided on the side wall of the cavity 215 for the other end of the flexible rope 231 to pass through. This embodiment achieves quick installation and replacement of the flexible rope 231 cutting component by designing the cutting component as a flexible rope 231 structure with a winding roller 23 and utilizing the cavity 215 of the base 21 for storage. When the flexible rope 231 wears out, the user only needs to replace the winding roller 23 assembly to restore the working capability. The thread-passing hole 212 design ensures the stability of the flexible rope 231 extension, retaining the advantages of traditional flexible rope 231 grass cutters being lightweight and safe, while solving the problem of complex rope replacement operations in traditional wound grass cutters through modular design, significantly improving maintenance convenience and operating efficiency.

[0050] Please see Figure 3 , 4 As shown in Figures 6, 8, and 9, in an optional embodiment of this utility model, the end of the cavity 215 away from the connecting part 211 has an opening. The retaining component includes a first end cap 22, which is connected to the base 21 via a snap-fit ​​to close the opening. This further embodiment, through the snap-fit ​​design of the first end cap 22, not only achieves quick assembly and disassembly of the winding roller 23, but also forms a sealed protection for the winding roller 23 inside the cavity 215. The tight fit between the end cap and the base 21 effectively prevents external grass clippings and debris from entering the cavity 215, avoiding the problem of the winding roller 23 getting stuck due to grass clippings, which is common in traditional open winding structures. This ensures the smooth operation of the winding mechanism, extends the service life of the cutting component 20, and significantly improves the reliability of the equipment in complex operating environments.

[0051] Please see Figure 5As shown, in an optional embodiment of this utility model, a first counterweight 216 is provided on the base 21 or the first end cap 22, and the center of gravity of the first counterweight 216 is located on the side of the axis of the base 21 away from the wire hole 212. It should be understood that during the operation of the flexible rope 231, the centrifugal force will cause the center of gravity of the cutting assembly 20 to shift. Therefore, this embodiment provides a first counterweight 216 on the base 21 or the first end cap 22. This further embodiment effectively balances the centrifugal force generated when the flexible rope 231 rotates at high speed by providing a first counterweight 216 off-axis on the first end cap 22 or the base 21, making the center of gravity of the cutting assembly 20 closer to the axis of rotation. This design significantly improves the dynamic balance performance of the lawnmower during operation, reduces equipment vibration and noise, not only improves operational comfort and stability, but also reduces wear of parts caused by vibration, extends the service life of the equipment, and makes the cutting trajectory of the flexible rope 231 more precise and controllable.

[0052] In a specific embodiment, the first counterweight 216 may be a counterweight block installed on the base 21 or the first end cap 22, or it may be a density-concentrated structure integrally formed on the base 21 or the first end cap 22, such as an integrally formed protrusion. Figure 5 In the embodiment shown, the first counterweight 216 is a counterweight block installed on the base 21. In some other embodiments, the first counterweight 216 may also be provided on the first end cap 22, or simultaneously on the base 21 and the first end cap 22.

[0053] Please see Figure 5 , 6 As shown in Figure 9, in an optional embodiment of this utility model, the fastener includes a plug 201 and a slot 202 that are inserted and engaged along the axial direction of the base 21. The sidewalls of the plug 201 and the slot 202 are provided with engaging portions 203. The engaging portions 203 are configured to engage with each other to prevent separation when the plug 201 and the slot 202 are inserted. The plug 201 is made of an elastic material, and a pressing portion 2011 is disposed on the plug 201. The plug 201 is configured to separate the engaging portions 203 when the pressing portion 2011 is subjected to external force. One of the plug 201 and the slot 202 is located on the base 21, and the other is located on the first end cap 22. This further embodiment achieves rapid locking and unlocking between the first end cap 22 and the base 21 through the snap-fit ​​design of the elastic plug 201 and the slot 202. The deformation characteristics of the elastic insert 201 allow users to complete the disassembly and assembly operations simply by applying appropriate external force. This ensures the end cover is securely closed during operation, preventing accidental opening that could expose the winding roller 23, and greatly simplifies the disassembly process during maintenance.

[0054] Please see Figure 5 ,6 As shown in Figures 9 and 1, in a further embodiment, the slot 202 is disposed on the outer peripheral surface of the base 21, and the slot of the slot 202 extends along the outer peripheral surface of the base 21 to at least a first end of the base 21, the first end being the end of the base 21 facing the first end cover 22. It should be understood that in some snap-fit ​​mechanisms, the snap-fit ​​is locked in a closed hole, with only a perforated part at one end of the hole to expose the snap-fit. When disassembling such a snap-fit, the operator needs to release the snap-fit ​​after pressing it through the perforated part in order to separate the slot from the insert. However, when releasing the snap-fit, it is easy for it to reset, requiring the operator to press it again. To avoid this problem, this utility model sets the slot 202 on the outer circumferential surface of the base 21 and makes its groove extend to the first end of the base 21. This realizes the automatic exposure and continuous retention function of the snap-fit ​​during disassembly. When the user separates the cutting head in the opposite direction of assembly, the through structure of the slot 202 will naturally guide the snap-fit ​​to slide outward, so that the pressing part 2011 is always exposed in the operable position. This not only retains the axial limiting reliability of the snap-fit, but also completely avoids the snap-fit ​​reset problem caused by the traditional closed hole structure.

[0055] In a specific embodiment, the snap-fit ​​portion 203 may be, for example, a wing 2032 provided on the insert block 201 and a protrusion 2031 provided on the side wall of the slot 202. The slot 202 has overhanging flanges 2021 on both sides of the slot opening. The wing 2032 protrudes inside the flange 2021. When the insert block 201 is pressed and deformed, the wing 2032 and the flange 2021 move away from each other. The protrusion 2031 is located inside the flange 2021. The protrusion 2031 and the wing 2032 have wedge-shaped surfaces on opposite sides in the assembly direction. The insert block 201 and the slot... During the insertion process, the wedge surface guides the insertion block 201 to deform, thereby causing the protrusion 2031 and the wing 2032 to avoid each other, ensuring that the insertion block 201 and the slot 202 can be smoothly inserted. After the two are inserted, the insertion block 201 returns to its original position under its own elastic force, causing the protrusion 2031 and the wing 2032 to abut against each other in the disassembly direction, thus preventing the insertion block 201 from separating from the slot 202. When it is necessary to separate the two, simply press the insertion block 201 with external force to make the protrusion 2031 and the wing 2032 return to the avoidance state, and the insertion block 201 can be pulled out. In the illustrated embodiment, the insertion block 201 is disposed on the first end cover 22 and the slot 202 is disposed on the base 21. However, it should be noted that in some other embodiments, the positions of the insertion block 201 and the slot 202 can be interchanged, and the specific form of the locking part 203 is not limited to the above embodiment. For example, the locking part 203 can also be a buckle and a slot that cooperate with each other.

[0056] Please see Figure 3-6As shown, in an optional embodiment of this utility model, a guide ring 214 made of wear-resistant material is provided on the edge of the wire hole 212. This further embodiment, by providing a wear-resistant guide ring 214 on the edge of the wire hole 212, effectively reduces the frictional wear between the flexible rope 231 and the hole wall during high-speed rotation, significantly extending the service life of the flexible rope 231. The wear-resistant properties of the guide ring 214 not only avoid the rope cutting phenomenon easily caused by traditional wire holes 212, but also ensure that the flexible rope 231 always smoothly extends and retracts along a predetermined trajectory, maintaining a stable cutting radius. Simultaneously, it reduces the risk of rope aging due to frictional heat, further improving the working reliability and efficiency of the lawnmower.

[0057] In a specific embodiment, the guide ring 214 can be made of a metallic material, such as aluminum alloy; or it can be made of a non-metallic material, such as engineering plastics, ceramics, rubber, etc. It should be noted that when setting the first counterweight 216, the present invention also needs to consider the center of gravity shift caused by the guide ring 214, that is, the first counterweight 216 needs to simultaneously counteract the center of gravity shift caused by the flexible rope 231 and the guide ring 214.

[0058] Please see Figure 5 , 6 As shown in Figure 8, in an optional embodiment of this utility model, a guide post 217 is provided inside the cavity 215, and the winding roller 23 is loosely fitted on the guide post 217; the end of the first end cap 22 facing the winding roller 23 is provided with an annular rib 221, and the annular rib 221 is coaxially arranged with the winding roller 23. This further embodiment, through the loose fitting structure between the guide post 217 and the winding roller 23, allows the winding roller 23 to form only a small area of ​​sliding contact with the guide post 217, which greatly reduces the rotational friction resistance; at the same time, the annular rib 221 of the first end cap 22 is coaxially arranged with the winding roller 23, which not only restricts the axial runout of the winding roller 23, but also avoids the additional friction force brought about by the traditional full end-face contact, reduces the mechanical wear of the winding roller 23 during operation, extends the service life of the winding roller 23, and improves the smoothness of the flexible rope 231 exiting the rope. In a specific embodiment, the winding roller 23 can be, for example, a winding disc with annular plates at both ends.

[0059] Example 2

[0060] Please see Figure 10-14As shown, this embodiment describes the technical solution of this utility model in conjunction with the case where the blade 242 is used as the cutting component. In this embodiment, the cutting component includes blades 242, with at least two blades 242 evenly spaced along the circumference of the base 21. This embodiment replaces a single flexible rope 231 with multiple circumferentially evenly distributed rigid blades 242, concentrating the cutting force on the cutting edge of the blades 242, significantly improving the ability to cut through thick weeds, shrubs, and other hard vegetation; while retaining the advantages of quick module replacement, it perfectly solves the problem of insufficient cutting force of the flexible rope 231 solution in hard vegetation scenarios. In specific embodiments, the blades can be made of high-hardness materials such as resin or metal.

[0061] Please see Figure 10 , 11 As shown in Figures 13 and 14, in an optional embodiment of this utility model, the retaining component includes a second end cap 24, which is connected to the base 21 via a snap-fit ​​element. The blade 242 is detachably mounted on the second end cap 24. This further embodiment, through the snap-fit ​​design of the second end cap 24, achieves a modular quick-release function for the blade 242 assembly, making maintenance more convenient. Simultaneously, the detachable blade 242 mounting method allows for the replacement of worn blades 242 individually rather than the entire assembly, significantly reducing operating costs.

[0062] It should be understood that in practical applications, the second end cap 24 in this embodiment and the first end cap 22 in embodiment 1 are used interchangeably. The assembly method between the two and the base 21 is the same. Therefore, the fastener in this embodiment is the same as the fastener in embodiment 1, and will not be described again here.

[0063] It should be understood that when the first counterweight 216 in Embodiment 1 is installed on the base 21, in order to counteract the center of gravity shift caused by the flexible rope 231, the center of gravity of the base 21 itself is not on its axis of rotation. When the flexible rope 231 is removed, in order to keep the base 21 balanced, a new counterweight needs to be introduced. For this reason, this embodiment provides a second counterweight 243 on the second end cap 24. The center of gravity of the second counterweight 243 is located on the side of the axis of the base 21 near the wire hole 212, thereby counteracting the center of gravity shift caused by the first counterweight 216. Similarly, the second counterweight 243 can be a counterweight block installed on the second end cap 24, or it can be a density-concentrated structure integrally formed on the second end cap 24, such as an integrally formed protrusion. In the illustrated embodiment, the second counterweight 243 is a density-concentrated structure integrally formed with the second end cap 24. The second counterweight 243 can be a single density-concentrated structure or multiple density-concentrated structures. The aforementioned center of gravity of the second counterweight 243 is located on the side of the axis of the base 21 near the wire hole 212, which means that the combined center of gravity of all density-concentrated structures is located on the side of the axis of the base 21 near the wire hole 212.

[0064] Please see Figure 10-13 As shown, in an optional embodiment of this invention, the second end cap 24 is provided with a mounting post 241 made of wear-resistant material, and the blade 242 is detachably connected to the mounting post 241. This further embodiment provides a high-strength support structure for the blade 242 by providing a wear-resistant mounting post 241 on the second end cap 24, which not only enhances the stability of the blade 242 installation but also significantly reduces frictional wear between the blade 242 and the end cap during rotation. The mounting post 241 can be made of, for example, metal.

[0065] Please see Figure 10-13 As shown, in an optional embodiment of this utility model, the mounting post 241 includes a large-diameter portion 2411 and a small-diameter portion 2412. The blade 242 is provided with a mounting hole, which includes a first region 2421 and a second region 2422. The width of the first region 2421 is greater than the diameter of the large-diameter portion 2411, and the width of the second region 2422 is less than the diameter of the large-diameter portion 2411 but greater than the diameter of the small-diameter portion 2412. A neck 2423 is provided between the first region 2421 and the second region 2422, and the width of the neck 2423 is less than the diameter of the small-diameter portion 2412. This further embodiment achieves quick locking and anti-loosening functions for the blade 242 through the matching design of the mounting post 241 and the mounting hole of the blade 242. The stepped structure of the large diameter portion 2411 and the small diameter portion 2412, combined with the specially shaped mounting hole, allows the blade 242 to be installed simply by pushing it into the first area 2421 and then sliding it into the second area 2422. The neck 2423 forms a mechanical stop to prevent the blade 242 from accidentally coming out. This design ensures the secure installation of the blade 242 while achieving quick installation and removal without additional fasteners. It avoids the common corrosion problem of bolted connections and ensures that the blade 242 will not loosen or fall off during high-intensity operations, significantly improving the ease of operation and work reliability.

[0066] Please see Figure 3 , 4 As shown in Figures 1 and 10, Embodiments 1 and 2 share the same base 21. In an optional embodiment of this invention, a blade 213 is provided on one end of the base 21 facing the drive device 10, and multiple blades 213 are evenly spaced along the circumference of the base 21. This further embodiment, by providing circumferentially evenly distributed blades 213 on the base 21, forms a directional airflow when the lawnmower is working. The airflow can help cool the drive device 10, preventing the motor or reducer from overheating. This integrated heat dissipation design improves the stability of continuous operation of the equipment, and is especially suitable for long-term, high-load garden operations.

[0067] Please see Figure 8 , 13As shown, in an optional embodiment of this utility model, the connecting part 211 includes an annular insert 2111, the inner diameter of which is configured to allow an interference fit with the output shaft of the drive device 10. This further embodiment uses the interference fit of the insert 2111 to replace the traditional threaded connection, eliminating the common risks of stripping and corrosion failure in threaded connections, ensuring a permanent and reliable connection between the drive shaft and the cutting assembly 20 under high-frequency vibration conditions; the stress distribution of the interference fit is more uniform, avoiding metal fatigue fracture caused by stress concentration at the root of the thread, and significantly improving the durability of the transmission components; the interference fit has good centering and reliable strength, which can effectively reduce the vibration of the whole machine. In a specific embodiment, the insert 2111 can be made of metal material, for example, and the insert 2111 can be integrally molded into the base 21 by an insert injection molding process.

[0068] In summary, this utility model, by designing the cutting component 20 as a combination of the base 21 and the replaceable component 20', achieves the technical effect of quickly replacing different cutting parts such as the flexible rope 231 or the rigid blade 242 on the same lawnmower. This solves the model compatibility problem caused by the fixed single cutting component in traditional lawnmowers. Users do not need to purchase multiple machines to handle different operating scenarios such as fine weeds and robust vegetation, significantly reducing garden maintenance costs. Simultaneously, the modular design improves the flexibility and efficiency of tool use, meeting diverse vegetation pruning needs. By optimizing the structural design of the buckle, the pressing part 2011 remains exposed during disassembly, allowing operators to directly separate the cutting head from the base 21 without loosening the buckle. This effectively solves the problem of secondary pressing caused by the easy reset of traditional buckles. This improvement significantly enhances disassembly efficiency, reduces operational complexity, and maintains the snap-fit ​​mechanism. The reliable fastener connection enables convenient one-handed operation; the counterweight ensures the cutting assembly 20 maintains good balance under different conditions, reducing equipment vibration and noise; the evenly distributed blades 213 on the base 21 create directional airflow during operation, which helps cool the drive unit 10 and prevents overheating of the motor or reducer. This integrated heat dissipation design improves the stability of continuous operation, making it particularly suitable for long-term, high-load garden operations; the use of an interference fit 2111 instead of a traditional threaded connection eliminates the common risks of slippage and corrosion failure associated with threaded connections, ensuring a permanent and reliable connection between the drive shaft and the cutting assembly 20 under high-frequency vibration conditions; the interference fit provides a more uniform stress distribution, avoiding metal fatigue fracture caused by stress concentration at the thread root, significantly improving the durability of transmission components; the interference fit offers good centering and reliable strength, effectively reducing overall machine vibration.

[0069] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0070] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. A cutting component for a lawn mower, characterized in that, include: A base, wherein the base is provided with a connecting part for connecting the output shaft of the drive device; Replaceable components include a cutting component and a retaining component, the retaining component being mounted to the base along the axial direction of the base, and the retaining component being configured to restrict the cutting component on the base; A latching element is provided between the retaining member and the base, the latching element being configured to limit at least axial displacement between the retaining member and the base.

2. The cutting component of the lawn mower according to claim 1, characterized in that, The fastener includes a pressing portion configured to release the axial displacement restriction between the retaining member and the base when subjected to an external force, and the fastener is configured to always expose the pressing portion when the retaining member and the base are separated from each other in the assembly direction.

3. The cutting component of the lawn mower according to claim 2, characterized in that, The latching member includes a plug and a slot that are inserted and engaged along the axial direction of the base. The sidewalls of the plug and the slot are provided with engaging portions that engage with each other. The engaging portions are configured to engage with each other to prevent the plug and the slot from separating when the plug and the slot are inserted. The plug is made of an elastic material. A pressing portion is provided on the plug. The plug is configured to separate the engaging portions when the pressing portion is subjected to an external force. One of the plug and the slot is located on the base, and the other is located on the retaining member.

4. The cutting component of the lawn mower according to claim 3, characterized in that, The slot is disposed on the outer peripheral surface of the base or the retaining member, and the slot opening extends along the outer peripheral surface of the base or the retaining member to at least a first end of the base or the retaining member, the first end being an end of the base facing the retaining member or an end of the retaining member facing the base.

5. The cutting assembly of the lawn mower according to claim 1, characterized in that, The cutting component includes a winding roller and a flexible rope. The base defines a cavity for housing the winding roller. One end of the flexible rope is wound around the winding roller. A wire-passing hole is provided on the side wall of the cavity for the other end of the flexible rope to pass through. An opening is provided at the end of the cavity away from the connecting portion. The retaining component includes a first end cap, which is connected to the base and closes the opening.

6. The cutting assembly of the lawn mower according to claim 5, characterized in that, The base or the first end cap is provided with a first counterweight, the center of gravity of the first counterweight is located on the side of the base axis away from the wire hole.

7. The cutting assembly of the lawn mower according to claim 5, characterized in that, The edge of the wire hole is provided with a guide ring made of wear-resistant material.

8. The cutting assembly of the lawn mower according to claim 5, characterized in that, The cavity is provided with a guide post, and the winding roller is loosely fitted on the guide post; the end of the first end cap facing the winding roller is provided with an annular rib, and the annular rib is arranged coaxially with the winding roller.

9. The cutting assembly of the lawn mower according to claim 1, characterized in that, The cutting component includes a blade, the retaining component includes a second end cap, the blade is mounted on the second end cap, and at least two blades are evenly spaced along the circumference of the second end cap.

10. The cutting assembly of the lawn mower according to claim 9, characterized in that, The base defines a cavity for housing the winding roller, the cavity having an opening at one end away from the connecting portion, and the second end cap being installed in the opening; the side wall of the cavity has a thread hole for the flexible rope to pass through; the base has a first counterweight, the center of gravity of the first counterweight being located on the side of the base axis away from the thread hole; the second end cap has a second counterweight, the center of gravity of the second counterweight being located on the side of the base axis closer to the thread hole.

11. The cutting assembly of the lawn mower according to claim 9, characterized in that, The second end cap is provided with a mounting post made of wear-resistant material, and the blade is detachably connected to the mounting post.

12. The cutting assembly of the lawn mower according to claim 11, characterized in that, The mounting post includes a large-diameter portion and a small-diameter portion. The blade is provided with a mounting hole, which includes a first region and a second region. The width of the first region is greater than the diameter of the large-diameter portion, and the width of the second region is less than the diameter of the large-diameter portion but greater than the diameter of the small-diameter portion. A neck is provided between the first region and the second region, and the width of the neck is less than the diameter of the small-diameter portion.

13. The cutting assembly of the lawn mower according to claim 1, characterized in that, The base has blades at one end facing the drive device, and multiple blades are evenly spaced along the circumference of the base.

14. The cutting assembly of the lawn mower according to claim 1, characterized in that, The connecting portion includes an annular insert, the inner diameter of which is configured to allow interference fit with the output shaft of the drive device.

15. A lawn mower, characterized in that, include: Handle assembly; A head assembly connected to the handle assembly, the head assembly including a drive unit and a cutting assembly; The cutting assembly includes a base and a replaceable component; The base is provided with a connecting part, which is used to connect the output shaft of the drive device; The replaceable component includes a cutting component and a retaining component, the retaining component being mounted to the base along the axial direction of the base, and the retaining component being configured to restrict the cutting component on the base; A latching element is provided between the retaining member and the base, and the latching element is configured to limit at least axial displacement between the retaining member and the base; The fastener includes a pressing portion configured to release the axial displacement restriction between the retaining member and the base when subjected to an external force, and the fastener is configured to always expose the pressing portion when the retaining member and the base are separated from each other in the assembly direction.

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