Mowing robot and its blade quick-release fixing assembly

Abstract

The utility model discloses a mower robot and blade quick detach fixing assembly thereof, and the blade quick detach fixing assembly comprises a positioning piece, a locking piece and an elastic piece; the positioning piece is used for being installed on a cutter head, the positioning piece has an axial through limiting cavity, and one end of the positioning piece is provided with a first limiting part; the locking piece is movably installed in the limiting cavity, and one end of the locking piece is provided with a second limiting part; the elastic piece is installed in the positioning piece and is used for applying a pre-tightening force to the locking piece; when the blade quick detach fixing assembly is in an unlocking mode, the locking piece is subjected to a force opposite to the pre-tightening force, the locking piece moves along the limiting cavity, and the locking piece rotates to make the length direction of the second limiting part parallel to that of the first limiting part, so that the blade can be taken out of or installed into the positioning piece. The assembly can realize quick replacement of the blade, does not need to rely on auxiliary tools such as screwdrivers, can reduce the workload of replacing the blade, can effectively improve the replacement efficiency of the blade, and can avoid accidental injury of the blade, so as to guarantee the safety of the staff.

Description

Technical Field

[0001] This utility model relates to the field of lawn mowing robot technology, and in particular to a lawn mowing robot and its blade quick-release fixing assembly. Background Technology

[0002] In related technologies, lawn mowing robots can be used for garden maintenance. The lawn mowing robot uses a blade mounted on a blade disc to drive the high-speed rotation of the blade disc to rotate and cut grass. However, when the blade is used for a period of time or when the blade is worn, the grass cutting effect is not good. Therefore, the blades of the lawn mowing robot blade disc need to be replaced regularly.

[0003] Blades are typically secured to the blade disc with screws. The conventional method for changing blades involves gripping the blade disc with one hand and using a tool such as a screwdriver or electric screwdriver to unscrew the blade. If the operator does not grip the blade disc firmly enough or slips, the blade disc can easily rotate and cut the hand holding the disc, potentially causing injury. This method of blade replacement is highly dependent on tools, has low efficiency, and poses significant safety hazards to operators. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lawn mowing robot and its blade quick-release fixing assembly.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A quick-release blade fixing assembly is constructed, including a positioning component, a locking component, and an elastic component; the positioning component is used to be installed on the blade disc, the positioning component has an axially penetrating limiting cavity, and the end of the positioning component protruding from the blade disc is provided with a first limiting portion; the locking component is movably installed in the limiting cavity, and the end of the locking component protruding from the first limiting portion is provided with a second limiting portion; the elastic component is installed inside the positioning component, and the elastic component is used to apply a preload force to the locking component;

[0006] The quick-release blade fixing assembly has a locking mode and an unlocking mode. In the locking mode, the first limiting part and the second limiting part are arranged with their length directions intersecting, and the two together limit the blade to the positioning member. In the unlocking mode, the locking member is subjected to a force opposite to the pre-tightening force, the locking member moves along the limiting cavity, and the locking member rotates so that the length directions of the second limiting part and the first limiting part are parallel, so that the blade can be removed from or inserted into the positioning member.

[0007] In some embodiments, the positioning member includes a main body, a positioning part, and a first limiting part connected in sequence. The main body is mounted on the cutter head, and the positioning part and the first limiting part protrude from the end face of the cutter head.

[0008] When the quick-release blade fixing assembly is in the locked mode, the first limiting part and the second limiting part are arranged intersecting in their length directions, so that the blade is limited to the positioning part; when the quick-release blade fixing assembly is in the unlocked mode, the locking member is subjected to a force opposite to the pre-tightening force, the locking member moves along the limiting cavity, and the locking member rotates so that the second limiting part is parallel to the length direction of the first limiting part, so that the blade can be removed or inserted into the positioning part.

[0009] In some embodiments, the main body is provided with a first limiting groove, the positioning part and the first limiting part are provided with a second limiting groove, and the inner cavities of the first limiting groove and the second limiting groove are interconnected to form the limiting cavity;

[0010] The elastic element is installed in the first limiting groove.

[0011] In some embodiments, the locking member includes a columnar portion that passes through the limiting cavity, a limiting member being provided at a first end of the columnar portion, and a second limiting portion being provided at a second end of the columnar portion;

[0012] The elastic element is disposed between the end wall of the first limiting groove and the limiting element.

[0013] In some embodiments, the limiting member includes a threaded portion and a third limiting portion connected to one end of the threaded portion. The first end of the columnar portion is provided with a threaded groove. The threaded portion is threadedly connected to the threaded groove. The third limiting portion is located outside the columnar portion, and the cross-sectional dimension of the third limiting portion is larger than the cross-sectional dimension of the columnar portion.

[0014] The elastic element is disposed between the end of the first limiting groove and the third limiting part.

[0015] In some embodiments, the elastic element includes a helical columnar spring, which is sleeved on the outer periphery of the portion of the columnar portion located within the first limiting groove.

[0016] In some embodiments, the two ends of the first limiting portion in the length direction are respectively extended with first protrusions toward the side away from the cutter head, and a first groove is formed between the two first protrusions;

[0017] The two ends of the second limiting part in the length direction extend towards one side of the cutter disc, and a second groove is formed between the two second protrusions;

[0018] When the blade quick-release fixing assembly is in the locked mode, the first groove and the second groove are engaged together; when the blade quick-release fixing assembly is in the unlocked mode, the end faces of the first protrusion and the second protrusion abut together.

[0019] In some embodiments, the surface of the second protrusion facing the cutter head is a plane; and / or the surface of the first limiting portion facing the main body is a plane, and / or the surface of the main body facing the first limiting portion is a plane; and / or the side surfaces of the first limiting portion in the width direction are all planes; and / or the side surfaces of the second limiting portion in the width direction are all planes.

[0020] In some embodiments, the length of the first limiting portion is greater than the width of the limiting hole of the blade, and the length of the first limiting portion is less than the length of the limiting hole of the blade.

[0021] The length of the second limiting part is greater than the width of the limiting hole of the blade, and the length of the second limiting part is less than the length of the limiting hole of the blade.

[0022] This utility model also discloses a lawn mowing robot, including a blade disc and a blade quick-release fixing assembly as described in any of the above embodiments, mounted on the blade disc.

[0023] The present invention has the following advantages: the quick-release blade fixing component can realize the quick replacement of blades without relying on auxiliary tools such as screwdrivers, which can reduce the workload of replacing blades and effectively improve the efficiency of blade replacement. In addition, due to its convenient and quick operation, it can avoid accidental injury from blades and ensure the safety of workers. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the lawnmower robot in some embodiments of this utility model;

[0026] Figure 2 This is one of the application diagrams of the blade quick-release fixing assembly in some embodiments of this utility model;

[0027] Figure 3 This is the second schematic diagram of the application of the quick-release fixing component for blades in some embodiments of this utility model;

[0028] Figure 4 This is the third schematic diagram of the application of the quick-release fixing component for blades in some embodiments of this utility model;

[0029] Figure 5 This is one of the exploded views of the blade quick-release fixing assembly and the blade in some embodiments of this utility model;

[0030] Figure 6 This is the second exploded view of the blade quick-release fixing assembly and the blade in some embodiments of this utility model;

[0031] Figure 7 This is an exploded cross-sectional view of the quick-release fixing assembly for the blade and the blade in some embodiments of this utility model.

[0032] Figure 8 This is a cross-sectional view of the quick-release fixing assembly for the blade and the blade in some embodiments of this utility model;

[0033] Figure 9 This is a schematic diagram of the blade quick-release fixing assembly in the locked mode in some embodiments of this utility model;

[0034] Figure 10 yes Figure 9 A sectional view;

[0035] Figure 11 yes Figure 10 Detailed images;

[0036] Figure 12 This is a schematic diagram of the blade quick-release fixing assembly in the unlocked mode in some embodiments of this utility model;

[0037] Figure 13 yes Figure 12 A sectional view;

[0038] Figure 14 yes Figure 13 Detailed images;

[0039] Figure 15 This is a schematic diagram of the structure of the blade quick-release fixing assembly in the unlocked mode and the blade rotated to the take-out position in some embodiments of this utility model;

[0040] Figure 16 yes Figure 15 A sectional view;

[0041] Figure 17 yes Figure 16 Detailed images;

[0042] Figure 18 This is a cross-sectional view of the blade being removed in some embodiments of this utility model;

[0043] Figure 19 yes Figure 18 Detailed images.

[0044] The components are labeled as follows: 10. Cutter head; 11. Limiting hole; 20. Blade; 30. Blade quick-release fixing assembly; 31. Positioning component; 311. Main body; 3111. First limiting groove; 3112. Second limiting groove; 312. Positioning part; 313. First limiting part; 3131. First protrusion; 3121. First groove; 32. Locking component; 321. Columnar part; 3211. Threaded groove; 322. Second limiting part; 3221. Second protrusion; 3222. Second groove; 33. Elastic component; 34. Limiting component; 341. Threaded part; 342. Third limiting part. Detailed Implementation

[0045] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0046] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0048] See Figure 1 This utility model discloses a lawnmower robot, which includes a blade disc 10 and a blade quick-release fixing assembly 30 mounted on the blade disc 10. The blade quick-release fixing assembly 30 can be used to fix the blades 20 relatively to the blade disc 10. A lawnmower robot is a mechanical tool used for trimming lawns, vegetation, etc. A lawnmower robot generally includes a chassis, a body, a blade disc 10, blades 20, a blade quick-release fixing assembly 30, a walking mechanism, and a control unit. The blade disc 10 can be mounted on the chassis, while the walking mechanism and control unit are mounted on the body. The blade disc 10 can be connected to a drive device, which drives the blade disc 10 to rotate, thereby achieving high-speed rotation of the blades 20 for weed cutting. The drive device includes, but is not limited to, a drive motor. The blades 20 can be general-purpose parts, or the blades 20 can be designed according to actual needs; no specific limitations are made here.

[0049] See Figures 2 to 19 As shown, this utility model discloses a quick-release blade fixing assembly 30, which can be used to fix a blade 20 on a cutter disc 10. The cutter disc 10 may be provided with multiple blades 20 and the quick-release blade fixing assembly 30. Preferably, each cutter disc 10 may be configured with three blades 20.

[0050] See Figures 2 to 19 As shown, in some embodiments, the quick-release blade fixing assembly 30 may include a positioning member 31, a locking member 32, and an elastic member 33; the positioning member 31 is used to be installed on the cutter head 10, the positioning member 31 has an axially penetrating limiting cavity, and the end of the positioning member 31 protruding from the cutter head 10 is provided with a first limiting portion 313; the locking member 32 is movably installed in the limiting cavity, and the end of the locking member 32 protruding from the first limiting portion 313 is provided with a second limiting portion 322; the elastic member 33 is installed in the positioning member 31, and the elastic member 33 is used to apply a preload (elastic force) to the locking member 32.

[0051] The quick-release blade fixing assembly 30 has a locking mode and an unlocking mode. When the quick-release blade fixing assembly 30 is in the locking mode, the first limiting part 313 and the second limiting part 322 are intersecting in their length directions, and together they limit the blade 20 to the positioning member 31 (e.g., ...). Figures 9 to 11(As shown); When the quick-release fixing assembly 30 of the blade is in the unlocked mode, the locking member 32 is subjected to a force opposite to the pre-tightening force. The locking member 32 moves along the limiting cavity, such as moving downwards, and the locking member 32 rotates so that the second limiting part 322 is parallel to the length direction of the first limiting part 313. At this time, the first limiting part 322 and the first limiting part 313 can be arranged to overlap in the height direction so that the blade 20 can be removed or inserted into the positioning member 31 for blade 20 replacement (e.g.). Figures 12 to 19 (As shown).

[0052] The quick-release blade fixing component 30 enables rapid replacement of the blade 20 without relying on auxiliary tools such as screwdrivers, reducing the workload of blade replacement and effectively improving the replacement efficiency of the blade 20. In addition, due to its convenient and quick operation, it can prevent accidental injury from the blade 20 and ensure the safety of workers.

[0053] like Figures 5 to 8 As shown, in some embodiments, the positioning member 31 may include a main body portion 311, a positioning portion 312, and a first limiting portion 313 connected in sequence. The main body portion 311 is mounted on the cutter head 10, and the positioning portion 312 and the first limiting portion 313 protrude from the end face of the cutter head 10, such as the lower end face of the cutter head 10. The main body portion 311 may be generally columnar, for example, a circular columnar structure. The positioning portion 312 may be columnar, for example, a circular columnar structure. The first limiting portion 313 may be a flat columnar structure. The cross-section of the main body portion 311 is larger than the cross-section of the positioning portion 312, and the cross-section of the first limiting portion 313 is larger than the cross-section of the positioning portion 312, so that while the positioning portion 312 can be used for positioning and mounting the blade 20, the main body portion 311 and the first limiting portion 313 can limit the blade 20. Preferably, when both the main body 311 and the positioning part 312 are cylindrical, the outer diameter of the main body 311 can be larger than the outer diameter of the positioning part 312.

[0054] When the quick-release fixing assembly 30 is in the locked mode, the first limiting part 313 and the second limiting part 322 are arranged intersecting in the length direction so that the blade 20 is limited to the positioning part 312. When the quick-release fixing assembly 30 is in the unlocked mode, the locking member 32 is subjected to a force opposite to the pre-tightening force, the locking member 32 moves along the limiting cavity, and the locking member 32 rotates so that the second limiting part 322 is parallel to the length direction of the first limiting part 313 so that the blade 20 can be removed from or inserted into the positioning part 312.

[0055] Combination Figures 4 to 8As shown, the cutter head 10 may be provided with mounting holes 11 penetrating its upper and lower surfaces. The main body 311 is installed in the mounting hole 11. The mounting hole 11 is provided with a first tooth. The outer periphery of the main body 311 of the positioning member 31 may be provided with a second tooth. The first tooth and the second tooth mesh with each other to achieve relative fixation. In addition, the positioning member 31 may be pre-fixed to the cutter head 10. The two may be integrally formed and fixed, or the positioning member 31 may be assembled with the mounting hole 11 and then welded and fixed, or the main body 311 of the positioning member 31 may be embedded in the mounting hole 11. It is understood that there may be a variety of installation methods for the positioning member 31, and no specific limitation is made here.

[0056] like Figures 5 to 8 As shown, in some embodiments, the main body 311 is provided with a first limiting groove 3111, and the positioning part 312 and the first limiting part 313 are provided with a second limiting groove 3112. The inner cavities of the first limiting groove 3111 and the second limiting groove 3112 are interconnected to form a limiting cavity. The elastic member 33 is installed in the first limiting groove 3111.

[0057] like Figures 5 to 8 As shown, in some embodiments, the locking member 32 may include a columnar portion 321, which passes through the limiting cavity. The first end of the columnar portion 321 is provided with a limiting member 34, and the second end of the columnar portion 321 is provided with a second limiting portion 322. The elastic member 33 is disposed between the end wall of the first limiting groove 3111 and the limiting member 34.

[0058] The columnar portion 321 can be a circular column, and both the first limiting groove 3111 and the second limiting groove 3112 can be circular columnar grooves. The outer diameter of the columnar portion 321 is similar to the inner diameter of the second limiting groove 3112, which makes the axial movement of the columnar portion 321 smoother and more precise, and avoids the columnar portion 321 from deviating when it moves.

[0059] like Figures 5 to 8 As shown, in some embodiments, the limiting member 34 includes a threaded portion 341 and a third limiting portion 342 connected to one end of the threaded portion 341. The first end of the columnar portion 321 is provided with a threaded groove 3211, and the threaded portion 341 is threadedly connected to the threaded groove 3211. The third limiting portion 342 is located outside the columnar portion 321, and the cross-sectional dimension of the third limiting portion 342 is larger than the cross-sectional dimension of the columnar portion 321. An elastic member 33 is disposed between the end of the first limiting groove 3111 and the third limiting portion 342 to apply a preload force to the locking member 32 through the third limiting portion 342. Further, the elastic member 33 includes, but is not limited to, a helical columnar spring, which is sleeved on the outer periphery of the portion of the columnar portion 321 located within the first limiting groove 3111.

[0060] The quick-release blade fixing assembly 30 is assembled as follows: the upper end of the columnar portion 321 passes through the second limiting groove 3112 and the first limiting groove 3111. Then, the elastic member 33 is fitted onto the portion of the columnar portion 321 located within the first limiting groove 3111. Next, the threaded portion 341 is connected to the threaded groove 3211, thus limiting the elastic member 33 between the end wall of the first limiting groove 3111 and the third limiting portion 342. In some embodiments, the limiting member 34 can be an M2X5 screw.

[0061] like Figures 5 to 8 As shown, in some embodiments, the two ends of the first limiting portion 313 in the length direction have first protrusions 3131 extending toward the side away from the cutter head 10, and a first groove 3132 is formed between the two first protrusions 3131. The two ends of the second limiting portion 322 in the length direction have second protrusions 3221 extending toward the side of the cutter head 10, and a second groove 3222 is formed between the two second protrusions 3221.

[0062] When the quick-release blade fixing assembly 30 is in the locked mode, the first groove 3132 and the second groove 3222 engage with each other, preventing relative displacement between the first limiting part 313 and the second limiting part 322, thus improving the limiting stability of the blade 20 and preventing the blade 20 from dislodging from the positioning member 31. When the quick-release blade fixing assembly 30 is in the unlocked mode, the end faces of the first protrusion 3131 and the second protrusion 3221 abut against each other, and the projections of the first limiting part 313 and the second limiting part 322 in the height direction coincide, allowing the blade 20 to be removed.

[0063] like Figures 5 to 8 As shown, in some embodiments, the surface of the second protrusion 3221 facing the blade disc 10 is flat; and / or the surface of the first limiting part 313 facing the main body 311 is flat, and / or the surface of the main body 311 facing the first limiting part 313 is flat; and / or the side surfaces of the first limiting part 313 in the width direction are all flat; and / or the side surfaces of the second limiting part 322 in the width direction are all flat, making the overall structure of the quick-release fixing assembly 30 of the blade relatively regular and compact, and avoiding large friction between it and the blade 20, thereby improving the service life of the blade 20.

[0064] like Figures 5 to 8 As shown, in some embodiments, the blade 20 has a limiting hole 21 extending through its upper and lower surfaces. The limiting hole 21 may be generally waist-shaped or racetrack-shaped. The shape and size of the horizontal projection of the first limiting portion 313 and the shape and size of the horizontal projection of the second limiting portion 322 are similar to or the same as the shape and size of the limiting hole 21 of the blade 20.

[0065] Wherein, the length of the first limiting part 313 is greater than the width of the limiting hole 21 of the blade 20, and the length of the first limiting part 313 is less than the length of the limiting hole 21 of the blade 20; the length of the second limiting part 322 is greater than the width of the limiting hole 21 of the blade 20, and the length of the second limiting part 322 is less than the length of the limiting hole 21 of the blade 20, such that when the length directions of the first limiting part 313, the second limiting part 322 and the limiting hole 21 are parallel or aligned, the blade 20 can be disengaged from the blade quick-release fixing assembly 30 (e.g., ...). Figures 12 to 19 (As shown). When the length directions of the first limiting part 313 and the second limiting part 322 intersect or are perpendicular to each other, the entire blade 20 cannot be dislodged from the blade quick-release fixing assembly 30 regardless of the direction it is rotated (as shown). Figure 2 and Figure 3 , Figures 9 to 11 (As shown).

[0066] In some embodiments, the sides of both ends of the first limiting portion 313 in the length direction are arc-shaped, and the sides of both ends of the second limiting portion 322 in the length direction are arc-shaped. When the blade quick-release fixing assembly is in the locking mode, the length directions of the first limiting portion 313 and the second limiting portion 322 intersect or are perpendicular to each other. The shape formed by the first limiting portion 313 and the second limiting portion 322 is approximately circular. The diameter of the structure formed by the two is always greater than the width of the limiting hole 21, so that the blade 20 cannot be dislodged from the blade quick-release fixing assembly 30.

[0067] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A quick-release blade fixing assembly, characterized in that, The device includes a positioning component, a locking component, and an elastic component. The positioning component is mounted on a cutter head and has an axially penetrating limiting cavity. A first limiting portion is provided at one end of the positioning component protruding from the cutter head. The locking component is movably mounted in the limiting cavity, and a second limiting portion is provided at one end of the locking component protruding from the first limiting portion. The elastic component is installed within the positioning component and is used to apply a preload force to the locking component. The blade quick-release fixing assembly has a locking mode and an unlocking mode. In the locking mode, the first limiting part and the second limiting part are arranged to intersect in the length direction, and the two together limit the blade to the positioning member. When in the unlocking mode, the locking member is subjected to a force opposite to the pre-tightening force, the locking member moves along the limiting cavity, and the locking member rotates so that the second limiting part is parallel to the length direction of the first limiting part, so that the blade can be withdrawn from or inserted into the positioning member.

2. The blade quick-release fixing assembly according to claim 1, characterized in that, The positioning component includes a main body, a positioning part, and a first limiting part connected in sequence. The main body is mounted on the cutter head, and the positioning part and the first limiting part protrude from the end face of the cutter head. When the blade quick-release fixing assembly is in the locking mode, the first limiting part and the second limiting part are arranged to intersect in the length direction so that the blade is limited to the positioning part; When the quick-release fixing assembly of the blade is in the unlocked mode, the locking member is subjected to a force opposite to the pre-tightening force, the locking member moves along the limiting cavity, and the locking member rotates so that the second limiting part is parallel to the length direction of the first limiting part, so that the blade can be withdrawn or inserted into the positioning part.

3. The blade quick-release fixing assembly according to claim 2, characterized in that, The main body is provided with a first limiting groove, and the positioning part and the first limiting part are provided with a second limiting groove. The inner cavities of the first limiting groove and the second limiting groove are interconnected to form the limiting cavity. The elastic element is installed in the first limiting groove.

4. The blade quick-release fixing assembly according to claim 3, characterized in that, The locking member includes a columnar portion that passes through the limiting cavity. A limiting member is provided at the first end of the columnar portion, and a second limiting member is provided at the second end of the columnar portion. The elastic element is disposed between the end wall of the first limiting groove and the limiting element.

5. The blade quick-release fixing assembly according to claim 4, characterized in that, The limiting member includes a threaded portion and a third limiting portion connected to one end of the threaded portion. The first end of the columnar portion is provided with a threaded groove. The threaded portion is threadedly connected to the threaded groove. The third limiting portion is located outside the columnar portion, and the cross-sectional dimension of the third limiting portion is larger than the cross-sectional dimension of the columnar portion. The elastic element is disposed between the end of the first limiting groove and the third limiting part.

6. The blade quick-release fixing assembly according to claim 5, characterized in that, The elastic element includes a helical columnar spring, which is sleeved on the outer periphery of the portion of the columnar part located within the first limiting groove.

7. The blade quick-release fixing assembly according to claim 2, characterized in that, The first limiting part has first protrusions extending from both ends in the length direction toward the side away from the cutter head, and a first groove is formed between the two first protrusions; The second limiting part has two ends extending towards one side of the cutter disc in the length direction, and a second groove is formed between the two second protrusions; When the blade quick-release fixing assembly is in the locked mode, the first groove and the second groove are engaged together; when the blade quick-release fixing assembly is in the unlocked mode, the end faces of the first protrusion and the second protrusion abut together.

8. The blade quick-release fixing assembly according to claim 7, characterized in that, The surface of the second protrusion facing the cutter head is a plane; and / or the surface of the first limiting part facing the main body is a plane, and / or the surface of the main body facing the first limiting part is a plane; and / or the side surfaces of the first limiting part in the width direction are all planes; and / or the side surfaces of the second limiting part in the width direction are all planes.

9. The blade quick-release fixing assembly according to any one of claims 1 to 8, characterized in that, The length of the first limiting part is greater than the width of the limiting hole of the blade, and the length of the first limiting part is less than the length of the limiting hole of the blade. The length of the second limiting part is greater than the width of the limiting hole of the blade, and the length of the second limiting part is less than the length of the limiting hole of the blade.

10. A lawnmower robot, characterized in that, It includes a cutter head and a quick-release blade retaining assembly as described in any one of claims 1 to 9, mounted on the cutter head.

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