Blade assembly and walking equipment

Abstract

The utility model provides a blade assembly and walking equipment. The blade assembly comprises a cutterhead, a connecting structure and a blade. The cutter head is provided with a through hole. The connecting structure comprises a movable shaft and a first limiting part, the movable shaft is movably installed in the through hole, the movable shaft comprises a first shaft section and a second shaft section, and the first shaft section is connected between the second shaft section and the first limiting part. The blade is detachably arranged between the first limiting part and the cutterhead, and the blade is provided with a first mounting hole and a channel communicated with the first mounting hole; when the blade is in a locked state, the first shaft section abuts against the cutter head, the first shaft section penetrates through the first mounting hole, and the blade is locked between the first limiting part and the cutter head; when the blade is in the unlocking state, at least part of the second shaft section is located between the cutter head and the first limiting part, the second shaft section can penetrate through the first mounting hole and the channel so that the blade can be separated from the position between the first limiting part and the cutter head, and therefore the assembling efficiency and assembling convenience of the blade and the cutter head are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowing machinery, in particular to a blade assembly and a walking device. Background Art

[0002] The blade assembly of a robotic lawn mower consists of a cutter disc and blades mounted on it. The blades of the cutter disc rotate to trim the lawn or other vegetation. However, existing blades must be attached to the cutter disc using screws. However, screw attachment requires numerous tools, and screws are often lost due to carelessness during installation or replacement. Assembly and disassembly are cumbersome, prone to errors, and inflexible. Utility Model Content

[0003] The utility model provides a blade assembly and a walking device to solve the technical problems that the existing blades require many tools when installed with screws, the screws are often lost due to negligence during installation or replacement, the disassembly and assembly are cumbersome and prone to errors, and the use is inflexible.

[0004] In a first aspect, the present invention provides a blade assembly comprising a cutter disc, a connecting structure, and a blade. The cutter disc is provided with a through hole. The connecting structure comprises a movable shaft and a first limiting portion, the movable shaft being movably mounted in the through hole, the movable shaft comprising a first shaft segment and a second shaft segment, the first shaft segment being connected between the second shaft segment and the first limiting portion. The blade is detachably arranged between the first limiting portion and the cutter disc, and the blade is provided with a first mounting hole and a passage communicating with the first mounting hole; the blade has a locked state and an unlocked state, and when the blade is in the locked state, the first shaft segment abuts against the cutter disc, the first shaft segment passes through the first mounting hole, and locks the blade between the first limiting portion and the cutter disc; when the blade is in the unlocked state, the second shaft segment is at least partially located between the cutter disc and the first limiting portion, and the second shaft segment can pass through the first mounting hole and the passage to disengage the blade from between the first limiting portion and the cutter disc.

[0005] In combination with the first aspect, in a possible implementation, the second shaft segment is threadedly engaged with the through hole; or, the connection structure further includes a second limiting portion and an elastic member, the second limiting portion and the first limiting portion are respectively connected to the two ends of the movable shaft, and the elastic member is arranged between the second limiting portion and the cutter disc.

[0006] In combination with the first aspect, in a possible implementation, a recessed groove communicating with the through hole is provided along the periphery of the through hole on the end surface of the cutter disc facing away from the blade, and the elastic member is at least partially accommodated in the recessed groove.

[0007] In combination with the first aspect, in a possible implementation, the connection structure further includes a connecting shaft, and the first limiting portion and / or the second limiting portion is detachably connected to the movable shaft via the connecting shaft.

[0008] In combination with the first aspect, in a possible implementation, a guiding inclined surface is provided at one end of the first shaft segment away from the first limiting portion, and a matching inclined surface adapted to the guiding inclined surface is provided on the hole wall of the through hole.

[0009] In combination with the first aspect, in one possible implementation, the radial dimension of the first shaft segment is less than or equal to the radial dimension of the first mounting hole, and when the blade is in the locked state, the length of the first shaft segment between the cutter disc and the first limiting portion is greater than or equal to the thickness of the blade.

[0010] In combination with the first aspect, in a possible implementation, when the blade is in the locked state, the length of the first shaft segment between the cutter disc and the first limiting portion is not less than twice the thickness of the blade.

[0011] In combination with the first aspect, in a possible implementation, the movable shaft further includes a third shaft segment, the third shaft segment is connected to an end of the second shaft segment facing away from the first shaft segment, and the radial dimension of the third shaft segment is greater than the radial dimension of the second shaft segment.

[0012] In combination with the first aspect, in one possible implementation, when the blade is in the locked state, one end of the third shaft segment close to the second shaft segment is located in the through hole and is adapted to the through hole; or, when the blade is in the locked state, the second shaft segment is located in the through hole and is adapted to the through hole.

[0013] In combination with the first aspect, in a possible implementation, the blade is provided with a first cutting edge along at least one side of the blade in a width direction, and the blade is provided with a second cutting edge along at least one side of the channel in a width direction of the blade.

[0014] In combination with the first aspect, in a possible implementation, the blade is further provided with a second mounting hole for the locking member to pass through.

[0015] In a second aspect, the utility model provides a walking device, comprising a driving mechanism and the blade assembly as described above, wherein the driving mechanism is used to drive the blade assembly to perform a cutting operation.

[0016] The blade assembly and walking device provided by the utility model are based on the setting of a connecting structure. When the blade is in a locked state, the first shaft section abuts against the cutter disc and is limited by the inner wall of the first mounting hole to lock the blade; when the blade is in an unlocked state, the second shaft section is at least partially located between the cutter disc and the first limiting portion, so that the second shaft section can be disengaged from the first mounting hole and the channel to unlock the blade. Therefore, by adjusting the position of the second shaft section relative to the cutter disc, the blade and the cutter disc can be quickly disassembled and assembled, thereby improving the assembly efficiency and convenience of the blade and the cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the blade assembly provided by an embodiment of the utility model.

[0018] Figure 2 yes Figure 1 A cross-sectional view of the blade assembly in FIG.

[0019] Figure 3 yes Figure 2 An enlarged view of portion I of the blade assembly.

[0020] Figure 4 yes Figure 1 An enlarged view of the blade in the blade assembly.

[0021] Explanation of the main component symbols: blade assembly-100; cutter disc-10; through hole-101; mating bevel-1011; sink-102; connecting structure-30; connecting hole-301; movable shaft-31; first shaft section-311; guide bevel-3111; second shaft section-312; third shaft section-313; first limiting portion-32; second limiting portion-33; connecting shaft-34; elastic member-35; blade-50; first cutting edge-51; second cutting edge-52; first mounting hole-501; channel-502; second mounting hole-503; length direction-X; width direction-Y; length-L; thickness-D.

[0022] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in conjunction with the accompanying drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" can be a connection between each other and the relative position relationship after connection remains unchanged. "Rotational connection" can be a connection between each other and can rotate relative to each other after connection. The term "integrally formed" means that in the process of forming one of the multiple components, the component is connected to the other components without the need for further processing (such as bonding, welding, snap connection, screw connection) to connect the two components together. The directional terms mentioned in the embodiments of the present invention, such as "top", "bottom", "inside", "outside", "side", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0025] See also Figure 1 , Figure 1 : This is a schematic structural diagram of a blade assembly 100 provided in an embodiment of the present invention. The blade assembly 100 includes a cutter disc 10, a connecting structure 30, and a blade 50. The cutter disc 10 is provided with a through hole 101. The connecting structure 30 includes a movable shaft 31 and a first limiting portion 32. The movable shaft 31 is movably mounted in the through hole 101. The movable shaft 31 includes a first shaft section 311 and a second shaft section 312. The first shaft section 311 is connected between the second shaft section 312 and the first limiting portion 32. The blade 50 is detachably disposed between the first limiting portion 32 and the cutter disc 10. The blade 50 is provided with a first mounting hole 501 and a channel 502 connected to the first mounting hole 501. The blade 50 has a locked state and an unlocked state. When the blade 50 is in the locked state, the first shaft section 311 abuts against the cutter disc 10. The first shaft section 311 passes through the first mounting hole 501, locking the blade 50 between the first limiting portion 32 and the cutter disc 10. When the blade 50 is in the unlocked state, the second shaft segment 312 is at least partially located between the cutter disc 10 and the first limiting portion 32. The second shaft segment 312 can pass through the first mounting hole 501 and the channel 502 to disengage the blade 50 from between the first limiting portion 32 and the cutter disc 10.

[0026] It should be noted that the term "locked state" refers to a state in which the blade 50 cannot be removed from the cutter head 10. The term "unlocked state" refers to a state in which the blade 50 can be removed from the cutter head 10 and can be laterally mounted on the movable shaft 31.

[0027] The blade assembly 100 provided by the present invention is based on the setting of the connecting structure 30. When the blade 50 is in a locked state, the first shaft segment 311 abuts against the cutter disc 10 and is limited by the inner wall of the first mounting hole 501 to lock the blade 50; when the blade 50 is in an unlocked state, the second shaft segment 312 is at least partially located between the cutter disc 10 and the first limiting portion 32, so that the second shaft segment 312 can be disengaged from the first mounting hole 501 and the channel 502 to unlock the blade 50. Therefore, by adjusting the position of the second shaft segment 312 relative to the cutter disc 10, the blade 50 and the cutter disc 10 can be quickly disassembled and assembled, thereby improving the assembly efficiency and convenience of the cutter disc 10 and the blade 50.

[0028] It should be noted that Figure 1 The purpose is only to schematically describe the arrangement of the cutter head 10, the connecting structure 30 and the blade 50, and is not to make specific limitations on the connection position, connection relationship and specific structure of each component. Figure 1 The structure of the blade assembly 100 is only shown in the embodiment of the present invention and does not constitute a specific limitation on the blade assembly 100. In other embodiments of the present invention, the blade assembly 100 may include Figure 1 More or fewer components, or combinations of certain components, or different components as shown, for example, the blade assembly 100 may also include but is not limited to safety protection structures and the like.

[0029] The through-hole 101 is located at the edge of the blade disc 10. Thus, when the blade assembly 100 is mowing, the blade disc 10 can rotate in a predetermined direction. Centrifugal force can cause the blades 50 mounted on the blade disc 10 to be thrown out of the edge of the blade disc 10. Specifically, the blades 50 rotate with the movable shaft 31 as the centrifugal axis, following the rotation of the blade disc 10. Centrifugal force allows the blades 50 to quickly extend out of the edge of the blade disc 10, severing grass blades with greater impact force, thereby improving the mowing efficiency of the blade assembly 100. Of course, in some embodiments, the through-hole 101 can be adjusted based on the actual application scenario. For example, the through-hole 101 can be located in the middle of the blade disc 10. The number of blades 50 can be one or more; increasing the number of blades 50 can improve the cutting efficiency of the blade assembly 100. Multiple blades 50 are evenly distributed along the outer periphery of the blade disc 10, thereby improving the uniformity of force applied to the blade assembly 100 and, in turn, enhancing its reliability and stability.

[0030] The through hole 101 passes through the two end surfaces of the cutter disc 10 along the thickness direction of the cutter disc 10. The first mounting hole 501 passes through the two end surfaces of the blade 50 along the thickness direction of the blade 50. The outer shape of the through hole 101 and the outer shape of the first mounting hole 501 are respectively the same as the outer shape of the movable shaft 31. This facilitates the assembly between the movable shaft 31, the cutter disc 10 and the blade 50. Specifically, the outer shape of the first mounting hole 501 is adapted to the outer shape of the first shaft section 311, thereby ensuring the balance of the blade 50 during high-speed rotation, improving the stability of the blade 50 during mowing, and reducing the maintenance cost caused by frequent replacement of the blade 50. The outer shape of the through hole and the outer shape of the first mounting hole 501 can be, but are not limited to, circular, rectangular or polygonal. The outer shape of the radial cross-section of the movable shaft 31 can be, but are not limited to, circular, rectangular or polygonal. Exemplarily, the through hole 101, the first mounting hole 501, the radial cross-section shape of the first shaft segment 311 and the radial cross-section shape of the second shaft segment 312 are each configured to be circular, thereby facilitating the processing and manufacturing of each part, facilitating assembly, and making the force on each part uniform, thereby extending the service life.

[0031] The two ends of the channel 502 along the length direction X of the blade 50 are respectively set as open ends. Specifically, the channel 502 passes through an end surface of the blade 50 along the length direction X of the blade 50, so that the blade 50 can be quickly inserted into or withdrawn from the movable shaft 31 from the side, and the blade 50 and the movable shaft 31 are detachably connected, thereby improving the efficiency of replacing the blade 50. Of course, in some embodiments, along the length direction X of the blade 50, the end of the channel 502 close to the first mounting hole 501 is set as an open end, and the end of the channel 502 away from the first mounting hole 501 is set as a closed end. The width dimension of the channel 502 at the closed end is greater than the radial dimension of the first limiting portion 32, thereby realizing the detachable connection between the cutter head 10 and the blade 50.

[0032] For example, in this embodiment, the first shaft section 311 of the movable shaft 31 is movably disposed in the first mounting hole 501, and the second shaft section 312 of the movable shaft 31 is movably disposed in the through hole 101. Thus, the user can adjust the position of the movable shaft 31 relative to the cutter disc 10, thereby facilitating the rapid insertion or withdrawal of the blade 50 from the side into or out of the movable shaft 31, and achieving a detachable connection between the blade 50 and the movable shaft 31, thereby improving the efficiency of replacing the blade 50. Specifically, the radial dimension of the first mounting hole 501 is larger than the radial dimension of the movable shaft 31 and smaller than the radial dimension of the first limiting portion 32, so that the blade 50 will not slip along the axial direction of the movable shaft 31 under the limitation of the first limiting portion 32, thereby achieving the blade 50 being confined between the cutter disc 10 and the first limiting portion 32, and achieving the movable shaft 31 being movably disposed through the blade 50.

[0033] It should be noted that the term "radial dimension" refers to the maximum radial dimension or maximum width dimension of the cross section of an object. For example, the radial dimension of the first limiting portion 32 refers to the maximum radial dimension or maximum width dimension of the first limiting portion 32 in a plane perpendicular to the central axis of the movable shaft 31.

[0034] The width dimension of the channel 502 is configured to be constant along the width direction Y of the blade 50. Along the width direction Y of the blade 50, the width dimension of the channel 502 is smaller than the radial dimension of the first shaft segment 311 and larger than the radial dimension of the second shaft segment 312. This allows the blade 50 to be inserted between the cutter disc 10 and the first stop 32 through the channel 502 and the second shaft segment 312. Alternatively, the blade 50 can be withdrawn from the movable shaft 31 through the channel 502, and the blade 50 can be restrained between the cutter disc 10 and the first stop 32 by the channel 502 and the first shaft segment 311, preventing the blade 50 from sliding off the cutter disc 10.

[0035] Of course, in some embodiments, the width dimension of the channel 502 is configured to be variable along the width direction Y of the blade 50. Specifically, the width of the channel 502 at the end near the first mounting hole 501 is smaller than the width at the end away from the first mounting hole 501, and the width of the channel 502 at the end near the first mounting hole 501 is smaller than the radial dimension of the first shaft segment 311 and larger than the radial dimension of the second shaft segment 312, thereby enabling assembly and disassembly of the blade 50. For example, the width of the channel 502 at the open end is smaller than the width of the channel 502 at the closed end. Optionally, along the width direction Y of the blade 50, the width dimension of the channel 502 gradually increases from the first mounting hole 501 to the channel 502.

[0036] It is understandable that the channel 502 is used to limit the blade 50, making the fixation of the blade 50 more stable. The width of the channel 502 along the width direction Y of the blade 50 can be adjusted according to the actual working scene, and the embodiment of the utility model does not make a specific limitation.

[0037] The extension path of the channel 502 is parallel to the longitudinal direction X of the blade 50, thereby facilitating the processing and assembly of the blade 50. Specifically, the extension path of the channel 502 is linear. Of course, in some embodiments, the extension path of the channel 502 can also be curved, for example, the extension path of the channel 502 can be arc-shaped, sawtooth-shaped, wavy, etc. This further reduces the risk of the second limiter 33 being accidentally triggered and causing the blade 50 to fall off the cutter head 10.

[0038] For the accuracy of description, please refer to the direction in this article. Figure 1For reference, the term "length direction X" refers to the arrangement direction of the first mounting holes 501 and the channels 502, i.e., the direction in which the long side of the blade 50 extends. The term "width direction Y" refers to the direction in which the short side of the blade 50 extends. The length direction X and the width direction Y together constitute two orthogonal directions of the blade 50. The length direction X and the width direction Y of the blade 50 can be customized based on the specific structure of the product and the perspective of the accompanying drawings, and are not specifically limited in the present embodiment.

[0039] It should be noted that the term "parallel" refers to the situation where two lines on a plane, two planes in space, or a line and a plane in space have no common points. In this utility model, the term "parallel" can include situations where the lines are approximately parallel due to processing errors, measurement errors, etc.

[0040] Please also refer to Figure 2 and Figure 3 , the first limiting portion 32 is fixedly connected to the movable shaft 31. Specifically, the first limiting portion 32 is connected to one end of the movable shaft 31. The first limiting portion 32 is used to stop the blade 50, so that the blade 50 will not slide along the axial direction of the movable shaft 31 under the limitation of the first limiting portion 32, thereby realizing that the blade 50 is limited between the cutter disc 10 and the first limiting portion 32. The first limiting portion 32 and the movable shaft 31 can be formed as one piece. The first limiting portion 32 and the movable shaft 31 are independently arranged and fixedly connected. For example, the first limiting portion 32 and the movable shaft 31 can also be fixedly connected by means of threads, clamping, welding, etc.

[0041] In some embodiments, the connection structure 30 further includes a second limiting portion 33 and an elastic member 35, and the second limiting portion 33 and the first limiting portion 32 are respectively connected to the two ends of the movable shaft 31. The elastic member 35 is disposed between the second limiting portion 33 and the cutter disc 10. It can be understood that when replacing or installing the blade 50, the user only needs to press the second limiting portion 33 downward to deform the elastic member 35 and allow the second shaft section 312 of the movable shaft 31 to extend from the through hole 101 of the cutter disc 10 to the bottom of the cutter disc 10. At this time, the blade 50 can be inserted from the side of the cutter disc 10 along the channel 502 between the second limiting portion 33 and the cutter disc 10; or, the blade 50 can be disengaged from the first mounting hole 501 and the channel 502, that is, the blade 50 can be pulled out from the side of the cutter disc 10 along the direction of the channel 502. When the user releases the second stopper 33, the elastic member 35 recovers its shape, and the second stopper 33, under the elastic force of the elastic member 35, drives the movable shaft 31 to slide upward, so that the first shaft section 311 abuts the cutter disc 10. At this time, the second shaft section 312 extends into the through hole 101, and the first shaft section 311 and the inner wall of the first mounting hole 501 are in a position stop, locking the blade 50 in the first mounting hole 501, thereby retaining the blade 50 between the first stopper 32 and the cutter disc 10 and preventing the blade 50 from falling off the side of the cutter disc 10. Therefore, the embodiment of the present invention quickly connects the cutter disc 10 and the blade 50 by setting a connecting structure 30. On the one hand, it avoids the problem that the screws are often lost due to negligence during installation or replacement, the disassembly and assembly are cumbersome and easy to make mistakes, and the use is inflexible, and there is no need to use tools such as screwdrivers, thereby improving the assembly efficiency and convenience of the cutter disc 10 and the blade 50; on the other hand, since the second limiting portion 33 is located on the side of the cutter disc 10 away from the blade 50, the user can prevent the blade 50 from being accidentally injured when pressing the second limiting portion 33, thereby improving the safety of the blade assembly 100; on the other hand, the elastic member 35 can provide elastic force to the second limiting portion 33, thereby realizing the automatic reset function of the second limiting portion 33, and the elastic member 35 has buffering and shock absorbing functions, thereby improving the connection reliability between the movable shaft 31 and the second limiting portion 33.

[0042] For example, in this embodiment, the elastic member 35 is sleeved on the outer side of the movable shaft 31. The elastic member 35 is configured as a spring. Of course, in other embodiments, the elastic member 35 can also be configured as a spring or other elastic structure.

[0043] Of course, in some embodiments, the second limiting portion 33 and the elastic member 35 can be omitted. Specifically, the movable shaft 31 is screwed to the cutter disc 10. Specifically, the through hole 101 is configured as a threaded hole, and the movable shaft 31 is provided with an external thread that cooperates with the threaded hole, thereby realizing the screw connection between the movable shaft 31 and the through hole 101. Thus, the user can adjust the second shaft segment 312 to extend out of the through hole 101 of the cutter disc 10 or extend into the through hole 101 of the cutter disc 10 by simply rotating the movable shaft 31, thereby enabling the blade 50 to be quickly inserted into or withdrawn from the movable shaft 31 from the side, thereby realizing a detachable connection between the blade 50 and the movable shaft 31, and improving the efficiency of replacing the blade 50. Specifically, the first shaft segment 311 of the movable shaft 31 is configured as a smooth shaft segment, and the second shaft segment 312 of the movable shaft 31 is configured as a threaded shaft segment. Therefore, in the locked state, the setting of the optical axis segment can reduce the wear between the blade 50 and the movable shaft 31, reduce noise, and improve the reliability of the blade 50 rotating around the first axis segment 311 and sliding along the first axis segment 311.

[0044] In this embodiment, a recessed groove 102 is provided along the periphery of the through-hole 101 on the end surface of the cutter head 10 facing away from the blade 50, communicating with the through-hole 101. The elastic member 35 is at least partially accommodated within the recessed groove 102. Thus, on the one hand, the recessed groove 102 serves to limit the elastic member 35 in both the horizontal and vertical directions, ensuring that the elastic member 35 stably performs its elastic function, thereby making the overall structure of the blade assembly 100 compact. On the other hand, the recessed groove 102 serves to position the assembly, improving assembly efficiency. Of course, in some embodiments, the cutter head 10 may not be provided with the recessed groove 102, that is, the elastic member 35 abuts the end surface of the cutter head 10 facing away from the blade 50.

[0045] For example, in this embodiment, the connection structure 30 further includes a connecting shaft 34, through which the second limiting portion 33 is detachably connected to the movable shaft 31. This facilitates assembly, maintenance, and replacement of the movable shaft 31 with the cutter head 10, blade 50, and elastic member 35. Furthermore, the detachable connection between the second limiting portion 33 and the movable shaft 31 prevents the second limiting portion 33 and the connecting shaft 34 from becoming detached from the movable shaft 31 due to gravity or external forces, thereby improving the connection reliability and operational safety of the various components of the blade assembly 100. The second limiting portion 33 and the connecting shaft 34 can be integrally formed. They can be independently disposed and fixedly connected. For example, the second limiting portion 33 and the connecting shaft 34 can also be fixedly connected by means of threads, clamping, welding, or the like. Specifically, a connecting hole 301 is provided at the end of the movable shaft 31 facing away from the first limiting portion 32, which is fixedly engaged with the connecting shaft 34. Of course, in some embodiments, a connecting hole 301 that cooperates and is fixed with the movable shaft 31 is provided at the end of the connecting shaft 34 facing away from the second limiting portion 33 .

[0046] Of course, in some embodiments, the first limiting portion 32 is detachably connected to the movable shaft 31 via the connecting shaft 34. The second limiting portion 33 is integrally formed with the movable shaft 31; or, the first limiting portion 32 and / or the second limiting portion 33 are both detachably connected to the movable shaft 31 via the connecting shaft 34.

[0047] A guiding inclined surface 3111 is provided at one end of the first shaft segment 311 away from the first limiting portion 32 , and a matching inclined surface 1011 adapted to the guiding inclined surface 3111 is provided on the hole wall of the through hole 101 . Therefore, on the one hand, when the first mounting hole 501 on the cutter disc 10 is misaligned with the first limiting portion 32, the elastic member 35 drives the first shaft segment 311 to move toward the cutter disc 10, so that the guide bevel 3111 can guide the blade 50 to move laterally, so that the first mounting hole 501 is aligned with the first limiting portion 32, thereby eliminating the need for the user to manually insert the blade 50 into the first shaft segment 311, thereby improving the safety of the blade assembly 100; on the other hand, since the radial dimension of the first shaft segment 311 is larger than the radial dimension of the through hole 101, the first shaft segment 311 cannot move in the through hole 101, and when the guide bevel 3111 cooperates with the bevel 1011 at the connecting hole 301 of the cutter disc 10, the stability of the movable shaft 31 can be guaranteed to prevent the movable shaft 31 from swinging.

[0048] The radial dimension of the first shaft segment 311 is less than or equal to the radial dimension of the first mounting hole 501. When the blade 50 is locked, the length L of the first shaft segment 311 between the cutter disc 10 and the first stop 32 is greater than or equal to the thickness D of the blade 50. Thus, when the blade 50 is locked, the blade 50 can rotate about the central axis of the movable shaft 31 and move in a direction parallel to the central axis of the movable shaft 31. As a result, the blade 50 can quickly extend beyond the edge of the cutter disc 10 under the influence of centrifugal force during the high-speed rotation of the cutter disc 10, thereby cutting through grass blades with greater impact force, thereby improving the mowing performance of the blade assembly 100.

[0049] Optionally, when the blade 50 is locked, the length L of the first shaft section 311 between the cutter disc 10 and the first stop 32 is no less than twice the thickness D of the blade 50. This allows the blade 50 to move freely between the bottom surface of the cutter disc 10 and the first stop 32, allowing the blade 50 to move up and down and rotate about the movable shaft 31, thereby preventing grass from being caught between the cutter disc 10 and the blade 50.

[0050] In some embodiments, the movable shaft 31 further includes a third shaft segment 313. The third shaft segment 313 is connected to the end of the second shaft segment 312 facing away from the first shaft segment 311. The radial dimension of the third shaft segment 313 is greater than the radial dimension of the second shaft segment 312. This avoids the problem of the width of the channel 502 on the blade 50 being too large, which would reduce the strength of the blade 50 on both sides of the channel 502, reduces the risk of blade 50 breaking, and extends the service life of the blade 50.

[0051] In some embodiments, when the blade 50 is in the locked state, the end of the third shaft segment 313 adjacent to the second shaft segment 312 is located within the through-hole 101 and is adapted to the through-hole 101. This prevents the movable shaft 31 from shaking relative to the cutter disc 10, improves the cutting effect of the blade 50, reduces noise, and avoids damage to the cutter disc 10 due to uneven force, thereby extending the service life of the blade assembly 100. Of course, in other embodiments, the movable shaft 31 may not be provided with the third shaft segment 313. When the blade 50 is in the locked state, the second shaft segment 312 is located within the through-hole 101 and is adapted to the through-hole 101. This prevents the movable shaft 31 from shaking relative to the cutter disc 10, improves the cutting effect of the blade 50, reduces noise, and avoids damage to the cutter disc 10 due to uneven force, thereby extending the service life of the blade assembly 100.

[0052] Please also refer to Figure 3 and Figure 4 , Figure 4 yes Figure 1 1 is an enlarged view of the blade 50 of the blade assembly 100. In some embodiments, the blade 50 is provided with a first cutting edge 51 along at least one side of the blade 50 in the width direction Y. The blade 50 is provided with a second cutting edge 52 along at least one side of the blade 50 in the channel 502 in the width direction Y. Thus, the provision of the first cutting edge 51 can improve the mowing efficiency of the blade 50, and the provision of the second cutting edge 52 can play a role in chopping grass, preventing grass from hanging in the channel 502, and ensuring that the blade 50 can perform the mowing operation normally. Of course, in some embodiments, the blade 50 may not be provided with the second cutting edge 52, that is, the blade 50 is provided with only the first cutting edge 51.

[0053] In some embodiments, the blade 50 is further provided with a second mounting hole 503 for a locking member to pass through. Specifically, the locking member can pass through the second mounting hole 503 and is used to mount the blade 50 on the cutter head 10. This allows the blade 50 to be adapted to conventional cutter heads 10 that are mounted via screws, enriching the use scenarios of the blade 50. The second mounting hole 503 and the first mounting hole 501 are arranged in a spaced relationship along the length direction X of the blade 50, thereby enhancing the overall structural strength of the blade 50 and allowing the blade 50 to be quickly inserted into and removed from the movable shaft 31 from the side. The locking member can be, but is not limited to, a bolt or a screw.

[0054] An embodiment of the present invention also provides a walking device. The walking device includes a driving mechanism and the above-mentioned blade assembly 100. The driving mechanism is used to drive the blade assembly 100 to perform cutting operations. The walking device includes a housing and a wheel hub. The driving mechanism and the blade assembly 100 are mounted on the housing. The blade assembly 100 is mounted inside the housing to avoid the problem of damage to the blade assembly 100 caused by external obstacles or the external environment. The number of blade assemblies 100 can be one or more. The number of driving mechanisms can be one or more. Each driving mechanism is connected to a blade assembly 100; each driving mechanism is connected to at least two blade assemblies 100. Each blade assembly 100 is mounted on the side of the driving mechanism facing the bottom surface and is at least partially exposed to the housing, so that the blade assembly 100 can rotate at high speed under the power provided by the driving mechanism to cut the grass blades.

[0055] It should be noted that the number, location and structure of the driving mechanism and the blade assembly 100 can be adjusted according to the actual working scenario, and the embodiment of the present invention does not make any specific limitations.

[0056] Walking devices may include, but are not limited to, hand-held, riding, and fully automatic intelligent walking devices, and the present invention does not limit this. The walking device can move on the ground. For example, the walking device can move on the ground when pushed by a user. For another example, the walking device itself has the ability to move. Specifically, the walking device includes drive wheels, and the walking device can automatically move on the ground via the drive wheels. The walking device can be configured as, but is not limited to, lawn mowing equipment, crop harvesting equipment, etc. In this embodiment, the walking device can be configured as lawn mowing equipment.

[0057] The above description is merely a specific implementation of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A blade assembly, characterized in that: include: A cutter head is provided with a through hole; a connecting structure comprising a movable shaft and a first limiting portion, wherein the movable shaft is movably mounted in the through hole, the movable shaft comprising a first shaft segment and a second shaft segment, wherein the first shaft segment is connected between the second shaft segment and the first limiting portion; a blade, detachably disposed between the first limiting portion and the cutter disc, the blade being provided with a first mounting hole and a channel communicating with the first mounting hole; The blade has a locked state and an unlocked state. When the blade is in the locked state, the first shaft segment abuts against the cutter disc, and the first shaft segment passes through the first mounting hole to lock the blade between the first limiting portion and the cutter disc; when the blade is in the unlocked state, the second shaft segment is at least partially located between the cutter disc and the first limiting portion, and the second shaft segment can pass through the first mounting hole and the channel to disengage the blade from between the first limiting portion and the cutter disc.

2. The blade assembly according to claim 1, wherein: The second shaft segment is threadedly engaged with the through hole; alternatively, the connection structure further includes a second limiting portion and an elastic member, the second limiting portion and the first limiting portion are respectively connected to the two ends of the movable shaft, and the elastic member is arranged between the second limiting portion and the cutter disc.

3. The blade assembly according to claim 2, wherein: A recessed groove communicating with the through hole is provided along the periphery of the through hole on the end surface of the cutter disc facing away from the blade, and the elastic member is at least partially accommodated in the recessed groove.

4. The blade assembly according to claim 2, wherein: The connection structure further includes a connecting shaft, and the first limiting portion and / or the second limiting portion is detachably connected to the movable shaft via the connecting shaft.

5. The blade assembly according to claim 1, wherein: A guiding inclined surface is provided at one end of the first shaft segment away from the first limiting portion, and a matching inclined surface adapted to the guiding inclined surface is provided on the hole wall of the through hole.

6. The blade assembly according to claim 1, wherein: The radial dimension of the first shaft segment is smaller than or equal to the radial dimension of the first mounting hole. When the blade is in the locked state, the length of the first shaft segment between the cutter disc and the first limiting portion is greater than or equal to the thickness of the blade.

7. The blade assembly according to claim 6, wherein: When the blade is in the locked state, the length of the first shaft segment between the cutter disc and the first limiting portion is not less than twice the thickness of the blade.

8. The blade assembly according to claim 1, wherein: The movable shaft further includes a third shaft segment, which is connected to an end of the second shaft segment facing away from the first shaft segment. The radial dimension of the third shaft segment is greater than the radial dimension of the second shaft segment.

9. The blade assembly according to claim 8, wherein: When the blade is in the locked state, one end of the third shaft segment close to the second shaft segment is located in the through hole and matches the through hole; or, when the blade is in the locked state, the second shaft segment is located in the through hole and matches the through hole.

10. The blade assembly according to claim 1, wherein: The blade is provided with a first cutting edge along at least one side of the blade in a width direction, and the blade is provided with a second cutting edge along at least one side of the channel in a width direction.

11. The blade assembly according to claim 1, wherein: The blade is further provided with a second mounting hole for the locking member to pass through.

12. A walking device, characterized in that: It comprises a driving mechanism and a blade assembly according to any one of claims 1 to 11, wherein the driving mechanism is used to drive the blade assembly to perform a cutting operation.

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