Blade removal structure and lawn mower

Abstract

The utility model provides a kind of blade dismounting structure, for connecting blade to the cutterhead of mower, comprising: installation pedestal includes cutterhead installation end and blade installation end, cutterhead installation end is connected with cutterhead, and blade installation end is equipped with blade installation port and the activity space being communicated with blade installation port;Locking member is rotatably installed at blade installation port, locking member has the locking state of closing blade installation port and the opening state of rotating to open blade installation port;Limiting structure connects blade installation end and locking member, to limit locking member in activity space;Blade one end is equipped with the sleeving part, the sleeving part passes through locking member, and is detachably sleeved in blade installation port.The utility model solves the problem that the limiting structure of relevant blade dismounting structure is loose and falls off in the use process, and cannot ensure the stability of blade in the working process.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and in particular to a blade disassembly and assembly structure and a lawnmower. Background Technology

[0002] Traditional lawnmowers have blades mounted on the blade disc that cannot be manually and quickly disassembled. While this design ensures the stability of the blades during operation, it also presents many inconveniences, such as requiring tools to replace the blades, which is time-consuming and labor-intensive.

[0003] Some related technologies include blade assembly / disassembly structures designed to enable quick installation and removal of blades via quick-release components. However, these quick-release components involve multiple parts, requiring each part to be installed or removed individually, making the process cumbersome.

[0004] To address this, related technologies, such as the Chinese patent document CN120457868A which discloses a blade disassembly and assembly structure and an intelligent lawnmower, have a first working condition and a second working condition when the locking component is in the unlocked state. In the first working condition, the locking component is released from its latching state with the base, allowing the operating part to rotate within the mounting hole, and the locking component to move relative to the base in a first direction within the mounting hole. In the second working condition, the locking component is completely disengaged from the mounting hole, allowing the blade to separate from the mounting space. Although this related technology solves the problem of difficult blade disassembly and assembly to some extent, it still has the following drawbacks: during use, the blade is prone to loosening and falling off due to the blade's limiting structure, making it impossible to ensure the stability of the blade during operation. Utility Model Content

[0005] One of the technical problems that this utility model aims to solve is that the blade mounting and dismounting structure of the relevant blade may loosen and fall off during use, which cannot ensure the stability of the blade during operation.

[0006] To solve the above-mentioned technical problems, a first aspect of the present invention provides a blade assembly / disassembly structure for connecting a blade to the cutter head of a lawnmower, comprising:

[0007] The mounting base includes a cutter head mounting end and a blade mounting end, the cutter head mounting end being connected to the cutter head, and the blade mounting end having a blade mounting opening and a movable space communicating with the blade mounting opening; a locking member, rotatably mounted at the blade mounting opening, the locking member having a locked state of closing the blade mounting opening and an open state of rotating to open the blade mounting opening; a limiting structure connecting the blade mounting end and the locking member to limit at least a portion of the locking member in the movable space; and a fitting portion at one end of the blade, the fitting portion passing through the locking member and detachably fitted into the blade mounting opening.

[0008] The blade mounting and disassembly structure provided by this utility model, through the setting of a mounting base, a locking component, and a limiting structure, allows the locking component to be rotatably mounted at the blade mounting opening of the mounting base. The locking component has a locked state (closing the blade mounting opening) and an open state (rotating to open the blade mounting opening). On the one hand, the blade mounting opening can be quickly opened with only a small external force, allowing the blade to be fitted into the movable space, achieving rapid blade installation. On the other hand, the limiting structure connected to the blade mounting end of the mounting base ensures that the locking component can only be opened from the outside in. This allows the blade, during operation, to be subjected to a horizontal centrifugal force, resulting in an outward force on the locking component from within the movable space. This makes the connection between the locking component and the limiting structure tighter, maintaining the locking component in a locked state. Furthermore, when the locking component is vertically positioned, the blade can be stably fitted onto the locking component during operation, avoiding the technical problem of the limiting structure loosening and falling off during use in other blade mounting and disassembly structures, which compromises the stability of the blade during operation.

[0009] Preferably, the limiting structure includes a limiting protrusion disposed at the blade mounting opening. The limiting protrusion abuts against the locking member, thereby limiting the movable end of the locking member so that the locking member can only be opened from the outside to the inside. When the limiting structure includes a locking element, the locking element is connected to the limiting protrusion to make the locking member in a locked state. The setting of the limiting protrusion facilitates the structural connection between the locking member and the blade mounting opening, and the shape and setting position of the limiting protrusion can be adjusted according to actual usage requirements.

[0010] Preferably, the contact surface between the limiting protrusion and the locking member is an outward-facing slope, and correspondingly, the contact surface between the locking member and the limiting protrusion is an inward-facing slope, thereby increasing the movable area of ​​the blade in the working space during the blade assembly and disassembly operation. The sloped contact surface of the limiting protrusion, while achieving limiting by contacting the movable end of the locking member, reduces the volume occupied by the limiting protrusion in the working space, increasing the working space for fitting the blade onto the locking member or disassembling the blade from the locking member within this space.

[0011] Preferably, the limiting structure includes a locking member disposed between the limiting protrusion and the movable end, so that when the locking member is rotated to the vertical setting state, the movable end is secured to the limiting protrusion, thereby locking the locking member in a locked state. This ensures that after the blade is fitted onto the locking member by the mounting part, even when the lawnmower is not in operation, i.e., when the blade does not exert centrifugal force on the locking member in the horizontal direction, the locking member and the blade mounting end remain locked, thus increasing the overall structural installation stability.

[0012] The locking element is located at the movable end of the locking member. The locking element includes a locking ball, a spring, and a movable cavity. The diameter of the opening end of the movable cavity is smaller than the diameter of the locking ball, so as to limit the locking ball and the spring in the movable cavity. The locking ball abuts against the opening end of the movable cavity under the action of the spring, and can squeeze the spring into the movable cavity when the locking ball is subjected to external force. The limiting protrusion has an arc-shaped groove at the position corresponding to the locking element. When the locking ball slides into the arc-shaped groove, the spring pushes the locking ball to abut against the arc-shaped groove, so that the locking member switches from the open state to the locked state.

[0013] Preferably, the limiting structure includes an elastic reset member. The connecting end of the locking member is hinged to the bottom of the blade mounting end via a pivot. The elastic reset member is located at the connection position between the locking member and the pivot. In the locked state, the elastic reset member is in an energy-storing state to abut the locking member against the blade mounting opening. The elastic reset member allows the locking member to actively reset to the locked state after blade assembly / disassembly operations, avoiding manual locking of the locking member to the blade mounting end structure. This improves the efficiency of the connection between the locking member and the blade mounting end structure, making blade assembly / disassembly faster and more convenient.

[0014] Preferably, the elastic reset component includes a torsion spring, which is sleeved on the rotating shaft so that the locking component is vertically positioned at the blade mounting opening. The torsion spring provides a thrust to the locking component to rotate outward from the movable space, so that when the locking component rotates to the vertical position, it connects with the blade mounting end to form a locked state, thereby resetting the locking component. This ensures that the locking component automatically resets after the blade is installed or after the blade is removed, effectively saving operation steps and work time.

[0015] Preferably, the elastic reset component includes a tension spring, one end of which is disposed on the locking component and the other end at the blade mounting opening, so as to drive the locking component to move towards the blade mounting opening and reset to the locked state. The tension spring is located on the side of the rotating shaft away from the movable space. With the tension spring positioned on the side of the rotating shaft away from the movable space, when the locking component is pushed into the movable space, the tension spring is in a stretched state, pressed against the rotating shaft by the locking component. The tension spring provides a pulling force to the locking component to rotate outward from the movable space, so that when the locking component rotates to a vertical position, it connects with the blade mounting end to form a locked state, thereby resetting the locking component. This ensures that the locking component automatically resets after the blade is installed or after the blade is removed, effectively saving operation steps and work time.

[0016] Preferably, at least one side of the locking member has an outwardly extending operating extension end, the shape of which is adapted to the shape of the limiting protrusion, to ensure that the locking member is vertically limited by the limiting protrusion and is not affected by the structural configuration of the operating extension end. The operating extension end increases the manual operating surface of the locking member, making it easier for users to assemble and disassemble the lawnmower blades by pressing the locking member, thus improving the convenience of blade assembly and disassembly.

[0017] A second aspect of this utility model provides a lawnmower, the lawnmower including a blade disc, blades, and a blade disassembly and assembly structure for connecting the blade disc and the blades, the blade disassembly and assembly structure being a blade disassembly and assembly structure according to any of the above-described embodiments.

[0018] The blade mounting and disassembly structure for a lawnmower provided by this utility model, through the setting of a mounting base, a locking component, and a limiting structure, allows the locking component to be rotatably mounted at the blade mounting opening of the mounting base. The locking component has a locked state (closing the blade mounting opening) and an open state (rotating to open the blade mounting opening). On the one hand, the blade mounting opening can be quickly opened with only a small external force, allowing the blade to be fitted into the movable space, achieving rapid blade installation. On the other hand, the limiting structure connected to the blade mounting end of the mounting base ensures that the locking component can only be opened from the outside in. This allows the blade, during operation, to exert a force on the locking component from within the movable space due to the horizontal centrifugal force, making the connection between the locking component and the limiting structure tighter and maintaining the locking component in a locked state. Furthermore, when the locking component is vertically set, the blade can always be stably fitted onto the locking component during operation, avoiding the technical problem of the blade limiting structure loosening and falling off during use in other lawnmower blade mounting and disassembly structures, which cannot ensure the stability of the blade during operation.

[0019] Preferably, each blade mounting structure has at least one blade to form a blade mounting group, and there are multiple blade mounting groups, which are evenly distributed along the outer periphery of the cutter head. The even distribution of multiple blade mounting groups on the cutter head allows for a more balanced force application and distribution during operation, resulting in higher overall stability, easier control and operation, and improved operating efficiency, ultimately leading to better operational results. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the blade disassembly and assembly structure disclosed in this utility model embodiment applied to a lawnmower;

[0022] Figure 2 yes Figure 1 A magnified structural diagram of part A in the diagram;

[0023] Figure 3 This is an exploded view of the blade assembly / disassembly structure disclosed in an embodiment of the present utility model;

[0024] Figure 4 yes Figure 3 A schematic diagram of the assembled side structure;

[0025] Figure 5 yes Figure 3 A schematic diagram of the card firmware structure;

[0026] Figure 6 This is an exploded view of another blade assembly / disassembly structure disclosed in this utility model embodiment;

[0027] Figure 7 yes Figure 6 A schematic diagram of the assembled side structure;

[0028] Figure 8 This is an exploded view of other blade assembly / disassembly structures disclosed in this utility model embodiment;

[0029] Figure 9 yes Figure 8 A schematic diagram of the assembled side structure;

[0030] Figure 10 This is a schematic diagram of the assembly structure of the blade disc, blades, and blade disassembly and assembly structure of the lawnmower provided by this utility model.

[0031] Figure 11 yes Figure 10 A schematic diagram of the blade mounting assembly.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Blade assembly / disassembly structure; 2. Blade; 201. Assembly unit; 3. Cutter head; 4. Mounting base; 401. Cutter head mounting end; 402. Blade mounting end; 4021. Blade mounting port; 4022. Movable space; 4023. Arc-shaped groove; 5. Locking element; 501. Movable end; 502. Connecting end; 503. Operating extension end; 6. Limiting structure; 601. Locking fastener; 6011. Locking ball; 6012. Spring; 6013. Moving cavity; 602. Limiting protrusion; 603. Elastic reset element; 6031. Torsion spring; 6032. Tension spring; 7. Rotating shaft; 8. Blade mounting assembly. Detailed Implementation

[0034] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0035] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0036] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Horizontal" is not strictly horizontal, but within the allowable error range. Words such as "including" indicate that the element preceding the word encompasses the element listed after it, but do not exclude the possibility of encompassing other elements as well.

[0038] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0039] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0041] like Figures 1 to 11 As shown, this utility model provides a blade mounting and dismounting structure 1 for connecting a blade 2 to the blade disc 3 of a lawnmower. The blade mounting and dismounting structure 1 includes a mounting base 4, a locking element 5, and a limiting structure 6. Figure 2 , 3 As shown, the mounting base 4 includes a cutter head mounting end 401 and a blade mounting end 402. The cutter head mounting end 401 is installed near the outer ring edge of the cutter head 3 and is connected to the cutter head 3.

[0042] In an optional embodiment of this utility model, the cutter head mounting end 401 and the cutter head 3 can be fixedly connected by bolting, such as by matching bolt holes and fixing them with bolts and nuts. When the cutter head mounting end 401 is made of metal, the cutter head mounting end 401 and the cutter head 3 can also be injection molded to ensure the stability of the structural connection between the cutter head mounting end 401 and the cutter head 3 during use, such as by welding.

[0043] The blade mounting end 402 has a U-shaped structure, and its top is fixedly connected to the cutter head mounting end 401. The blade mounting end 402 has a blade mounting opening 4021 and a movable space 4022 communicating with the blade mounting opening 4021. A locking member 5 is vertically mounted at the blade mounting opening 4021. The locking member 5 can be, but is not limited to, a plate-like structure. The locking member 5 has a movable end 501 and a connecting end 502. The connecting end 502 of the locking member 5 is hinged to the bottom of the blade mounting end 402 via a pivot 7. A limiting structure 6 connects the blade mounting end 402 and the locking member 5 to limit at least part of the locking member 5 within the movable space 4022. The locking member 5 has a locked state with the blade mounting opening 4021 closed and an open state with the blade mounting opening 4021 rotated open. Under the action of external force, the locking member 5 can be opened from the outside to the inside. One end of the blade 2 is provided with a sleeve part 201. The sleeve part 201 passes through the locking member 5 and is detachably fitted into the movable space 4022 that communicates with the blade mounting port 4021.

[0044] The blade mounting and disassembly structure 1 provided by this utility model, by setting a mounting base 4, a locking member 5 and a limiting structure 6, allows the locking member 5 to be rotatably installed at the blade mounting port 4021 of the mounting base 4. The locking member 5 has a locked state of closing the blade mounting port 4021 and an open state of rotating to open the blade mounting port 4021. On the one hand, the blade mounting port 4021 can be quickly opened under relatively small external force, and the blade 2 can be fitted into the movable space 4022, so as to realize the quick installation of the blade 2. On the other hand, by utilizing the limiting structure 6 connected to the blade mounting end 402 of the mounting base 4, the locking member 5 can only be opened from the outside to the inside. This allows the blade 2 to exert a force from the inside to the outside on the locking member 5 during operation due to the horizontal centrifugal force, making the connection between the locking member 5 and the limiting structure 6 tighter and keeping the locking member 5 locked. Furthermore, when the locking member 5 is vertically set, the blade 2 can always be stably fitted on the locking member 5 during operation, avoiding the technical problem of the blade's limiting structure loosening and falling off during use, which cannot ensure the stability of the blade during operation.

[0045] Furthermore, in this invention, the final limiting state of the locking member 5 is set to be vertical. This is intended so that when the lawnmower starts operating, the blade 2 is subjected to a horizontal centrifugal force. Only when the locking member 5 is vertically positioned, or at least its contact surface with the blade 2 is a vertical surface perpendicular to the horizontal plane of blade 2's rotation, can the centrifugal force on the blade 2 directly act on the locking member 5. This prevents the locking member 5 from deflecting at an angle, thus ensuring the normal operation of the lawnmower. In other words, it improves the efficiency of blade replacement and disassembly without affecting the normal operation of the lawnmower.

[0046] In an optional embodiment of this utility model, the fitting portion 201 of the blade 2 has a circular opening, such as... Figure 11 As shown, the blade 2 is assembled and disassembled by housing the locking member 5 within the circular opening. Of course, the mounting portion 201 of the blade 2 can also be an opening of other shapes; as long as the connection between the mounting portion 201 and the locking member 5 can be achieved, these are all essentially equivalent alternative solutions. It should be noted that the blade 2, mounted on the locking member 5 via the mounting portion 201 and placed within the movable space 4022, allows for positional movement within a certain limited range. For example, during operation, under the influence of centrifugal force in the horizontal direction, the blade 2 will be parallel to the horizontal plane; while in a static state, the blade 2, under the influence of its own gravity, will form a certain angle with the horizontal plane it is working on.

[0047] In an optional embodiment of this utility model, such as Figure 3 , Figure 4 ,and Figures 6 to 8As shown, the limiting structure 6 includes a limiting protrusion 602 located at the blade mounting port 4021. The limiting protrusion 602 abuts against the locking member 5, thereby limiting the movable end 501 of the locking member 5 so that the locking member 5 can only be opened from the outside to the inside. When the limiting structure 6 includes a retaining member 601, the retaining member 601 is connected to the limiting protrusion 602, so that the locking member 5 is in a locked state. The setting of the limiting protrusion 602 facilitates the structural connection between the locking member 5 and the blade mounting port 4021. Specifically, the shape and setting position of the limiting protrusion 602 can be adjusted according to actual usage requirements.

[0048] It should be noted that not only can the shape and position of the limiting protrusion 602 be adjusted to suit actual needs, but the fastener 601 can also be adjusted to any other structure that can fix the position of the locking member 5 and the blade mounting end 402 when rotated to a vertical position, according to actual usage requirements or production specifications. Furthermore, these structural adjustments are all essentially the same structural modifications as the present invention, and constitute an extension of the present invention's solution combined with conventional methods.

[0049] In an optional embodiment of this utility model, such as Figure 3 , Figure 4 ,and Figures 6 to 8 As shown, the contact surface between the limiting protrusion 602 and the locking member 5 is an outward-facing slope. Correspondingly, the contact surface between the locking member 5 and the limiting protrusion 602 is an inward-facing slope that is compatible with it. This slope extends downward towards one side of the limiting protrusion 602 to increase the movable area of ​​the blade 2 in the movable space 4022 during blade assembly and disassembly operations. It should be noted that the aforementioned outward slope refers to the slope towards the side of the blade mounting opening 4021 away from the movable space 4022, while the corresponding slope towards the movable space 4022 is an inward slope. The sloped design of the contact surface of the limiting protrusion, while achieving the limiting by contacting the movable end of the locking member, reduces the volume occupied by the limiting protrusion 602 in the movable space 4022. This increases the working space in the movable space 4022 for the blade 2 to be mounted on the locking member 5 or for the blade 2 to be disassembled from the locking member 5, making the blade assembly and disassembly operations of the lawnmower more convenient. Similarly, the inclined structural surface design of the movable end 501 of the locking member 5 reduces the volume occupied by the movable end 501 when it rotates in the activity space 4022, and facilitates the installation of the blade 2. It also increases the working space in the activity space 4022 for the blade 2 to be installed on the locking member 5 or for the blade 2 to be removed from the locking member 5, making the blade installation and removal operation of the lawnmower more convenient.

[0050] In an optional embodiment of this utility model, such as Figures 3 to 5As shown, the limiting structure 6 includes a locking member 601, which is disposed between the limiting protrusion 602 and the movable end 501 of the locking member 5. When the locking member 5 is rotated to a vertical position, the movable end 501 is locked onto the limiting protrusion 602, thus locking the locking member 5 in a locked state. This ensures that after the blade 2 is fitted onto the locking member 5 via the fitting part 201, even when the lawnmower is not in operation (i.e., when the blade 2 does not exert centrifugal force on the locking member 5 in the horizontal direction), the locking member 5 remains locked to the blade mounting end 402, thereby increasing the overall structural stability.

[0051] In a further optional embodiment of this utility model, such as Figures 3 to 5 As shown, the locking element 601 is disposed at the movable end 501 of the locking member 5. The locking element 601 includes a locking ball 6011, a spring 6012, and a movable cavity 6013. Specifically, the diameter of the opening end of the movable cavity 6013 is smaller than the diameter of the locking ball 6011, so as to limit the locking ball 6011 and the spring 6012 in the movable cavity 6013. Under the action of the spring 6012, the locking ball 6011 abuts against the opening end of the movable cavity 6013, and can squeeze the spring 6012 to move into the movable cavity 6013 when the locking ball 6011 is subjected to external force. The locking element 601 is disposed at the movable end 501 of the locking member 5. A curved groove 4023 is provided at a position corresponding to the locking element 601 on the limiting protrusion 602. Specifically, the locking ball 6011 of the limiting protrusion 602, which matches the locking element 601, has the curved groove 4023. When the locking ball 6011 slides into the curved groove 4023, the spring 6012 pushes the locking ball 6011 to abut against the curved groove 4023, causing the locking member 5 to switch from an open state to a locked state. In other embodiments of this invention, the locking element 601 may also be disposed on the abutment surface of the limiting protrusion 602 used to connect the locking member 5, and the curved groove 4023 may match the locking element 601 disposed on the movable end 501 of the locking member 5. The number of locking elements 601 may be multiple.

[0052] In an optional embodiment of this utility model, such as Figure 11 As shown, the limiting structure 6 includes an elastic reset member 603, and the locking member 5 is installed at the blade mounting port 4021 via a rotating shaft 7. The elastic reset member 603 is located at the connection position between the locking member 5 and the rotating shaft 7. In the locked state, the elastic reset member 603 is in an energy-storing state to abut the locking member 5 against the blade mounting port 4021. The elastic reset member 603 enables the locking member 5 to actively reset to the locked state after blade assembly / disassembly operations, avoiding manual locking of the locking member 5 to the blade mounting end 402, improving the efficiency of the connection between the locking member 5 and the blade mounting end 402, and making blade assembly / disassembly of the blade assembly / disassembly structure 1 faster and more convenient.

[0053] In a further optional embodiment of this utility model, such as Figure 6 and Figure 7 As shown, the elastic reset member 603 includes a torsion spring 6031, which is sleeved on the rotating shaft 7 so that the locking member 5 is vertically positioned at the blade mounting opening 4021. The torsion spring 6031 provides a thrust to the locking member 5 to rotate outward from the movable space 4022, so that when the locking member 5 rotates to the vertical position, it connects with the blade mounting end 402 to form a locked state, thereby resetting the locking member. This ensures that the locking member 5 automatically resets after the blade 2 is installed or after the blade 2 is removed, effectively saving operation steps and working time.

[0054] In further optional embodiments of this utility model, such as Figure 8 and Figure 9 As shown, the elastic reset component 603 includes a tension spring 6032. One end of the tension spring 6032 is disposed on the locking component 5, and the other end is disposed at the blade mounting port 4021, so as to drive the locking component 5 to move towards the blade mounting port 4021 and reset to the locked state. The tension spring 6032 is located on the side of the rotating shaft 7 away from the active space 4022. The tension spring 6032 is set to be located on the side of the rotating shaft 7 away from the active space 4022. When the locking component 5 is pushed to move into the active space 4022, the tension spring 6032 is in a stretched state, pressed against the rotating shaft 7 by the locking component 5. The tension spring 6032 provides a pulling force to the locking component 5 to rotate outward from the active space 4022, so that when the locking component 5 rotates to the vertical state, it connects with the blade mounting end 402 to form a locked state, thereby realizing the reset of the locking component 5. This ensures that the locking component 5 automatically resets after the blade 2 is installed or after the blade 2 is removed, which can effectively save operation steps and operation time.

[0055] In other optional embodiments of this utility model, the elastic reset member 603 is not limited to a spring structure, but can also be an elastic block of flexible material with a certain elasticity, which can satisfy the reset of the auxiliary locking member 5, such as a flexible rubber block. The rubber block abuts against the locking member 5 near the rotating shaft 7, and is squeezed or stretched when the locking member 5 rotates into the active space 4022, and can act on the locking member 5 to return it to the locked state connected to the blade mounting end 402.

[0056] In an optional embodiment of this utility model, such as Figure 3 , Figure 6 and Figure 8As shown, at least one side of the locking member 5 has an outwardly extending operating extension end 503 to ensure that the locking member 5 is limited vertically by the limiting protrusion 602 and is not affected by the structural arrangement of the operating extension end 503. The operating extension end 503 increases the manual operation surface of the locking member 5, making it easier for users to disassemble and assemble the lawnmower blades 2 by pressing the locking member 5, thus improving the convenience of blade disassembly and assembly.

[0057] The second aspect of this utility model provides a lawnmower, such as Figure 1 , Figure 2 and Figure 10 As shown, the lawnmower includes a blade disc 3, blades 2, and a blade assembly / disassembly structure 1 for connecting the blade disc 3 and the blades 2, wherein the blade assembly / disassembly structure 1 is a blade assembly / disassembly structure according to any of the above-described embodiments.

[0058] The blade mounting and disassembly structure 1 for a lawnmower provided by this utility model, through the setting of a mounting base 4, a locking member 5, and a limiting structure 6, allows the locking member 5 to be rotatably mounted at the blade mounting opening 4021 of the mounting base 4. The locking member 5 has a locked state where the blade mounting opening 4021 is closed and an open state where the blade mounting opening 4021 is rotated open. On the one hand, the blade mounting opening 4021 can be quickly opened with only a small amount of external force, allowing the blade 2 to be fitted into the movable space 4022, thus achieving rapid installation of the blade 2. On the other hand, by utilizing the limiting structure 6 connected to the blade mounting end 402 of the mounting base 4, the locking member 5 can only be opened from the outside in. This allows the blade 2 to exert an outward force on the self-moving space 4022 of the locking member 5 due to the horizontal centrifugal force during operation, making the connection between the locking member 5 and the limiting structure 6 tighter and keeping the locking member 5 locked. Furthermore, when the locking member 5 is set vertically, the blade 2 can always be stably fitted on the locking member 5 during operation, avoiding the technical problem of the blade limiting structure loosening and falling off during use in the blade assembly and disassembly structure of the lawnmower, which cannot ensure the stability of the blade during operation.

[0059] In an optional embodiment of this utility model, at least one blade 2 is provided on a blade assembly structure 1 to form a blade mounting group 8. When multiple blades 2 are provided on a blade assembly structure 1, spacers are provided between adjacent blades 2 to prevent adjacent blades 2 from interacting during operation and affecting work efficiency. The spacers can be metal spacers or rubber spacers with a certain thickness, and the specific dimensions can be adjusted according to the structural length of the locking member 5 used to mount the blades 2, as well as the number and thickness of the blades 2.

[0060] In a further optional embodiment of this utility model, there may be multiple blade mounting groups 8, which are evenly distributed along the outer periphery of the cutter head 3. The even distribution of multiple blade mounting groups 8 on the cutter head 3 allows for a more balanced application and distribution of force during operation, resulting in higher overall stability, easier control and operation, and improved operating efficiency, thus achieving better operational results.

[0061] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0062] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A blade assembly / disassembly structure for connecting blades to the cutter head of a lawnmower, characterized in that, include: The mounting base includes a cutter head mounting end and a blade mounting end. The cutter head mounting end is connected to the cutter head, and the blade mounting end is provided with a blade mounting port and an active space communicating with the blade mounting port. A locking member is rotatably mounted at the blade mounting port, and the locking member has a locked state of closing the blade mounting port and an open state of rotating to open the blade mounting port; A limiting structure is provided, which connects the blade mounting end and the locking member to limit at least a portion of the locking member within the movable space. One end of the blade is provided with a fitting part, which passes through the locking member and is detachably fitted into the blade mounting port.

2. The blade assembly / disassembly structure according to claim 1, characterized in that, The limiting structure includes a limiting protrusion disposed at the blade mounting opening. The limiting protrusion abuts against the locking member so that the limiting protrusion limits the movable end of the locking member, allowing the locking member to be opened only from the outside to the inside.

3. The blade assembly / disassembly structure according to claim 2, characterized in that, The contact surface between the limiting protrusion and the locking member is an outward-facing slope, and correspondingly, the contact surface between the locking member and the limiting protrusion is an inward-facing slope to increase the movable area of ​​the blade in the active space when the blade is assembled or disassembled.

4. The blade assembly / disassembly structure according to claim 2, characterized in that, The limiting structure includes a locking element disposed at the movable end of the locking member. The locking element includes a locking ball, a spring, and a movable cavity. The diameter of the opening end of the movable cavity is smaller than the diameter of the locking ball, so as to limit the locking ball and the spring in the movable cavity. The locking ball abuts against the opening end of the movable cavity under the action of the spring, and can squeeze the spring into the movable cavity when the locking ball is subjected to external force. The limiting protrusion is provided with an arc-shaped groove at the position corresponding to the fastener. When the locking ball slides into the arc-shaped groove, the spring pushes the locking ball to abut against the arc-shaped groove, so that the locking member switches from the open state to the locked state.

5. The blade assembly / disassembly structure according to claim 1, characterized in that, The limiting structure includes an elastic reset member. The connecting end of the locking member is hinged to the bottom of the blade mounting end via a rotating shaft. The elastic reset member is disposed at the connection position between the locking member and the rotating shaft. In the locked state, the elastic reset member is in an energy storage state to abut the locking member against the blade mounting opening.

6. The blade assembly / disassembly structure according to claim 5, characterized in that, The elastic reset member includes a torsion spring, which is sleeved on the rotating shaft so that the locking member is vertically positioned at the blade mounting opening.

7. The blade assembly / disassembly structure according to claim 5, characterized in that, The elastic reset component includes a tension spring, one end of which is disposed on the locking component and the other end of which is disposed at the blade mounting port, so as to drive the locking component to move toward the blade mounting port and reset to the locked state. The tension spring is located on the side of the rotating shaft away from the active space.

8. A lawnmower, characterized in that, The lawnmower includes a blade disc, blades, and a blade assembly / disassembly structure for connecting the blade disc and the blades, wherein the blade assembly / disassembly structure is the blade assembly / disassembly structure according to any one of claims 1 to 7.

9. The lawnmower according to claim 8, characterized in that, Each blade mounting structure has at least one blade to form a blade mounting group, and there are multiple blade mounting groups, which are evenly distributed along the outer periphery of the cutter head.

10. The lawnmower according to claim 8, characterized in that, The at least two blades are mounted on the same locking element of the blade assembly / disassembly structure, and a spacer is provided between adjacent blades.

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