Cutting assembly and mower

Abstract

The utility model provides a mower and a cutting assembly. The cutting assembly comprises a blade connecting assembly and at least two cutting blades arranged on the blade connecting assembly at different heights, and the multiple layers of cutting blades are detachably installed at the output end of the driving device together through connecting pieces on the blade connecting assembly. On one hand, the grass chopping quality and the cutting efficiency are improved through the multiple layers of blades, on the other hand, the whole cutting assembly can be separated from the mower as long as the blade connecting assembly is detached from the output shaft, and the cutting blades can be simply and rapidly detached and replaced. The cutting assembly can be installed on the mower and used for executing mowing operation, and the multiple cutting blades are detachably installed on the mower together through the blade connecting assembly.

Description

Technical Field

[0001] The present application relates to the technical field of garden tools, and in particular to a cutting assembly and a lawn mower. Background Art

[0002] Ordinary power mowers usually use a single-layer cutting blade, which is connected to a cutter disc through a connecting piece. The output shaft of the driving device of the power mower drives the cutter disc to rotate to cut the lawn. However, when the blade cuts long grass, the cut grass is not broken, and the straw left on the lawn is too long. In order to improve the grass-cutting quality of the mower, in recent years, power mowers including single or multiple cutting devices with multiple layers of blades have gradually appeared. The cutter disc of the cutting device of such mowers often includes multiple connecting parts on the same installation level for connecting the cutting blades, and often also includes installation levels of different heights to achieve the purpose of multiple layers of blades to break grass.

[0003] As a consumable part, the cutting blade is often replaced due to wear. The traditional installation structure of the cutting blade is: multiple blade mounting seats are evenly distributed and welded on the installation horizontal circumference of the cutter disc, and the cutting blade is fixedly connected to the blade mounting seat by fasteners. If it needs to be replaced due to wear, the fasteners need to be unscrewed for replacement, which is time-consuming and laborious. If the lawn mower uses a cutting device with multiple blades, the increase in the number of blades and the limited removal space of the cutting blades caused by the installation horizontal surfaces at different heights will increase the workload and complexity of replacing the blades. Utility Model Content

[0004] In view of this, the embodiments of the present application are directed to providing a cutting assembly and a lawn mower, which improve the grass cutting quality of the lawn mower while allowing for simple and quick disassembly and replacement of the cutting blade.

[0005] In a first aspect, a lawn mower is provided, comprising:

[0006] case;

[0007] A moving device, configured to be connected to the housing and drive the lawn mower to move;

[0008] A driving device, disposed on the housing;

[0009] A cutting device, connected to the driving device and configured to perform a cutting task under the driving of the driving device;

[0010] The cutting device comprises at least one cutting assembly, which comprises a blade connecting assembly and at least two cutting blades, wherein the at least two cutting blades are arranged on the blade connecting assembly, and the cutting assembly is detachably connected to the output end of the driving device via a connecting piece on the blade connecting assembly.

[0011] As an embodiment, the cutting device includes a cutter disc, the cutting assembly is mounted on the cutter disc, and the output end of the driving device is matched with the cutter disc to drive the cutting assembly to rotate for cutting; at least part of the blade connecting assembly is detachably connected to the cutter disc, and the cutting assembly is detachably connected to the cutter disc via a connecting piece on the blade connecting assembly.

[0012] As an embodiment, the at least two cutting blades are arranged at different height positions of the blade connecting assembly.

[0013] As an embodiment, the blade connecting assembly of the cutting assembly has an upper end and a lower end in the height direction of the lawn mower, and the at least two cutting blades are installed between the upper end and the lower end, and at least the upper end of the upper end and the lower end is connected to the cutter disc.

[0014] As an embodiment, the cutter disc includes a first cutter disc and a second cutter disc disposed below the first cutter disc, the upper end portion is connected to the first cutter disc, and the lower end portion is connected to the second cutter disc.

[0015] As an implementation manner, among the first cutter disc and the second cutter disc, at least the second cutter disc is detachably connected to the output end;

[0016] The upper end portion is detachably connected to the first cutter disc and / or the lower end portion is detachably connected to the second cutter disc.

[0017] As an embodiment, the cutting device further comprises an auxiliary cutting assembly disposed below the cutting assembly, and the cutting assembly and the auxiliary cutting assembly are respectively detachably connected to the blade disc.

[0018] As an embodiment, the auxiliary cutting assembly includes a single-layer cutting blade; or, the auxiliary cutting assembly includes a blade connecting assembly and at least two cutting blades.

[0019] As an embodiment, the auxiliary cutting assembly is connected below the second blade disc.

[0020] As an embodiment, the cutting device also includes a cutter disc connecting portion arranged between the first cutter disc and the second cutter disc, the first cutter disc is connected above the cutter disc connecting portion, the second cutter disc is connected below the cutter disc connecting portion, the cutter disc connecting portion is matched with the output end of the driving device, and the cutter disc connecting portion is integrally formed with at least one of the first cutter disc and the second cutter disc; or, the cutter disc connecting portion is separately arranged from the first cutter disc and the second cutter disc.

[0021] As an embodiment, the mating position of the cutting assembly with the first blade disc and the second blade disc is outside the maximum outer edge of the blade disc connecting portion.

[0022] As an implementation manner, a closed space is formed between the second cutter disc and the cutter disc connecting portion, and the closed space accommodates the output end.

[0023] As an embodiment, the at least two cutting blades are detachably connected to the blade connecting assembly.

[0024] As an embodiment, the blade connection assembly includes a shaft body, and the cutting blade is rotatably mounted on the shaft body.

[0025] As an embodiment, blade separation parts are provided at different heights of the blade connection assembly, and the blade separation parts are located between adjacent cutting blades so that the at least two cutting blades are separated at different heights; the blade separation parts are sleeved on the shaft body.

[0026] As an embodiment, the cutting blade is provided with a first mounting hole, and the cutting blade is mounted on the shaft body through the first mounting hole. The blade separation part is provided with a second mounting hole, and the blade separation part is mounted on the shaft body through the second mounting hole. The inner diameters of the first mounting hole and the second mounting hole are larger than the outer diameter of the shaft body.

[0027] As an embodiment, the shaft body has an upper end and a lower end in the height direction of the lawn mower, and the at least two cutting blades are installed between the upper end and the lower end. At least one of the upper end and the lower end is detachably or fixedly connected with a stop portion, and the radial size of the stop portion along the shaft body is larger than the inner diameter of at least one of the first mounting hole and the second mounting hole.

[0028] As an embodiment, the cutting blade and the blade connecting assembly are arranged to be clearance-fitted, and the cutting blade can move radially and / or axially along the blade connecting assembly.

[0029] As an embodiment, in the radial direction of the output shaft, an avoidance space is formed between the cutter disc and the blade connecting assembly so that the cutter disc can avoid the impact of the cutting blade when it moves left and right relative to the blade connecting assembly.

[0030] As an embodiment, the cutting device includes at least two cutting components, and the at least two cutting components are distributed along the circumference of the cutter disc.

[0031] As an embodiment, in two adjacent layers of cutting blades in the height direction of the lawn mower, the diameter of the cutting track of the cutting blade located in the upper layer is greater than the diameter of the cutting track of the cutting blade located in the lower layer.

[0032] As an embodiment, in the radial direction of the output end, the bottom cutting blade of the cutting device extends beyond the outer edge of the blade disc, and the length L of the bottom cutting blade extending beyond the outer edge of the blade disc is greater than or equal to the single cutting amount X0 of the bottom cutting blade. The single cutting amount X0 of the bottom cutting blade is the length of the portion of the cutting blade that contacts the grass during a single cutting process.

[0033] As an implementation mode, L / X0≥2.3.

[0034] As an embodiment, when the rotation speed of the cutting device is greater than a preset rotation speed, the phase difference between the at least two cutting blades on the same cutting assembly on the cutter disc is within a preset angle.

[0035] On the other hand, a cutting assembly is provided, which includes a blade connecting assembly and at least two cutting blades, wherein the at least two cutting blades are arranged on the blade connecting assembly, and the cutting assembly is detachably connected to the lawn mower via a connecting piece of the blade connecting assembly.

[0036] As an embodiment, the at least two cutting blades are detachably connected to the blade connecting assembly.

[0037] As an embodiment, the blade connection assembly includes a shaft body, and the cutting blade is rotatably mounted on the shaft body.

[0038] As an embodiment, the at least two cutting blades are arranged at different height positions of the blade connecting assembly.

[0039] As an embodiment, blade separation parts are provided at different heights of the blade connection assembly, and the blade separation parts are located between adjacent cutting blades so that the at least two cutting blades are separated at different heights; the blade separation parts are sleeved on the shaft.

[0040] As an embodiment, the cutting blade is provided with a first mounting hole, and the cutting blade is mounted on the shaft body through the first mounting hole. The blade separation part is provided with a second mounting hole, and the blade separation part is mounted on the shaft body through the second mounting hole. The inner diameters of the first mounting hole and the second mounting hole are larger than the outer diameter of the shaft body.

[0041] As an embodiment, the shaft body has an upper end and a lower end in the height direction of the cutting assembly, and the at least two cutting blades are installed between the upper end and the lower end. At least one of the upper end and the lower end is detachably or fixedly connected with a stop portion, and the radial dimension of the stop portion along the shaft body is larger than the inner diameter of at least one of the first mounting hole and the second mounting hole.

[0042] As an embodiment, the cutting blade and the blade connecting assembly are arranged to be clearance-fitted, and the cutting blade can move radially and / or axially along the blade connecting assembly.

[0043] On the other hand, a lawn mower is provided, which includes a driving device, which is arranged inside the lawn mower; a cutting device, which is configured to perform a cutting task under the drive of the driving device; the cutting device includes: a first cutter disc, which is matched with the output end of the driving device, and the driving device drives the first cutter disc to rotate; at least two cutting assemblies, which are arranged on the first cutter disc and distributed along the circumference of the first cutter disc, and the first cutter disc drives the cutting assembly to rotate for cutting; the cutting assembly includes a blade connecting assembly and at least two cutting blades arranged at different heights of the blade connecting assembly; the cutting assembly is detachably mounted on the first cutter disc through the blade connecting assembly.

[0044] As an embodiment, the cutting assembly has one and only one blade connecting assembly, and the cutting blades of the cutting assembly are located at different heights of the blade connecting assembly.

[0045] As an embodiment, the cutting assembly includes at least two blade connecting assemblies, and the at least two blade connecting assemblies are connected as a whole.

[0046] As an embodiment, the blade connecting assembly includes a first state and a second state; when the blade connecting assembly is in the first state, the blade connecting assembly is connected to the first blade disc, and the first blade disc drives the cutting assembly to rotate for cutting; when the blade connecting assembly is in the second state, the blade connecting assembly is separated from the first blade disc, and the cutting assembly is separated from the first blade disc.

[0047] As an embodiment, any cutting blade of the cutting assembly is arranged below the first blade disc; and one end of the blade connecting assembly is detachably mounted on the first blade disc.

[0048] As an embodiment, the cutting device includes a second cutter disc, the second cutter disc is arranged below the first cutter disc, any cutting blade of the cutting assembly is arranged above the second cutter disc, and the other end of the blade connecting assembly is detachably mounted on the second cutter disc.

[0049] As an implementation mode, the cutting assembly is clamped or inserted between the first blade disc and the second blade disc through two ends of the blade connecting assembly.

[0050] As an embodiment, a first limiting portion is provided at both ends of the blade connecting assembly, and the first blade disc and the second blade disc are provided with a second limiting portion and a third limiting portion respectively matched with the first limiting portion, so that the cutting assembly can be clamped or passed through the two ends of the blade connecting assembly between the first blade disc and the second blade disc.

[0051] As an embodiment, the two ends of the blade connection assembly are shaft bodies, the first limiting portion is one or two of a shoulder, a cone or a sleeve; the second limiting portion and the third limiting portion are hole-like structures matched with the first limiting portion.

[0052] As an embodiment, the blade connection assembly is a shaft body, one end of the cutting blade is provided with a mounting hole, and the cutting blade is sleeved on the shaft body through the mounting hole.

[0053] As an embodiment, a stop portion is provided at one end or both ends of the shaft body, and the stop portion can be detachably or fixedly installed on the end of the shaft body; the cutting blade is arranged inside the end of the shaft body; the size of the stop portion along the circumference of the shaft body is larger than the inner diameter of the mounting hole to prevent the cutting blade from detaching from the end of the shaft body.

[0054] As an embodiment, the cutting device includes a second cutting assembly, and the second cutting assembly is installed below the cutting assembly.

[0055] As an embodiment, the second cutting assembly includes at least two second cutting blades distributed along the circumference of the second cutter disc, and the second cutting blades are detachably mounted below the second cutter disc.

[0056] As an embodiment, at least two cutting assemblies are arranged below the second cutter disc, the cutting assemblies are distributed along the circumference of the second cutter disc, and the blade connecting assemblies of the cutting assemblies are detachably mounted on the second cutter disc.

[0057] As an embodiment, the second cutting blade of the second cutting assembly extends out from one end of the second blade disc, and the distance between the second cutting blade and the outer edge of the second blade disc is greater than or equal to the single cutting amount of the cutting blade, and the single cutting amount of the second cutting blade is the length of the part that contacts the grass during a single cutting process.

[0058] As an embodiment, the cutting device includes a blade disc connecting portion, which is arranged between the first blade disc and the second blade disc, the first blade disc is detachably connected above the blade disc connecting portion, the second blade disc is detachably connected below the blade disc connecting portion, and the blade disc connecting portion is connected to the output end of the drive device; when the drive device drives the blade disc connecting portion to rotate, the second blade disc follows the blade disc connecting portion to rotate; the maximum distance between the outer edge of the blade disc connecting portion and the output end of the drive device is less than the minimum distance between the blade connecting assembly and the output end of the drive device.

[0059] As an implementation manner, the second blade disc is a stainless steel blade disc.

[0060] As an embodiment, the matching positions of the cutting blades of the cutting assembly and the blade connecting assembly can be connected into a straight line.

[0061] As an embodiment, the straight line forms an acute angle with the rotation center axis of the first cutter disc, and the straight line gradually approaches the rotation center axis from top to bottom in the height direction; the lengths of the cutting blades of the cutting assembly are the same.

[0062] As an implementation manner, the straight line is parallel to the rotation center axis of the first cutter disc, and the length of each cutting blade of the cutting assembly gradually shortens from top to bottom in the height direction.

[0063] As an embodiment, the cutting blade of the cutting assembly is clearance-fitted with the blade connecting assembly, and when the first blade disc drives the cutting assembly to rotate for cutting, the cutting blade can move left and right and up and down relative to the blade connecting assembly.

[0064] As an embodiment, the blade connection assembly includes a shaft body, the cutting blade includes a mounting hole, and the cutting blade is sleeved on the shaft body through the mounting hole.

[0065] As an embodiment, the blade connecting assembly is a shaft body, and a stop portion is provided at one end or both ends of the shaft body. The stop portion can be removably or fixedly provided at the end of the shaft body, and the cutting blade is provided inside the end of the shaft body; the size of the stop portion along the circumference of the shaft body is larger than the inner diameter of the mounting hole to prevent the cutting blade from detaching from the end of the shaft body.

[0066] As an embodiment, the stop portion includes a sleeve sleeved on the end of the shaft body.

[0067] As an embodiment, a blade separation portion is provided between adjacent cutting blades of the cutting assembly so that the cutting blades are located at different heights of the blade connecting assembly; and the outer surface of the blade separation portion is cylindrical.

[0068] As an embodiment, the blade separation portion and the cutting blade are an inseparable whole.

[0069] As an embodiment, all the cutting blades and blade separation parts of the cutting assembly are integrally formed and cannot be disassembled.

[0070] In a second aspect, a cutting assembly is provided, which can be detachably mounted on a lawn mower, and the cutting assembly includes at least two cutting blades; the characteristic is that: the cutting assembly also includes a blade connecting assembly, and any cutting blade of the cutting assembly is located at different heights of the blade connecting assembly; the cutting assembly is detachably mounted on the lawn mower via the blade connecting assembly.

[0071] As an embodiment, the cutting blade can move leftwards and rightwards and up and down relative to the blade connecting assembly.

[0072] As an embodiment, the blade connection assembly includes a shaft body, the cutting blade includes a mounting hole, the cutting blade is sleeved on the shaft body through the mounting hole, and the inner diameter of the mounting hole is greater than the outer diameter of the shaft body.

[0073] As an embodiment, the maximum distance that the cutting blade moves up and down relative to the blade connecting assembly is greater than zero and less than or equal to 1.6 mm.

[0074] As an implementation manner, the maximum distance is 0.7 mm.

[0075] As an embodiment, the blade connecting assembly is a shaft body, and a stop portion is provided at one end or both ends of the shaft body. The stop portion can be removably or fixedly provided at the end of the shaft body, and the cutting blade is provided inside the end of the shaft body; the size of the stop portion along the circumference of the shaft body is larger than the inner diameter of the mounting hole to prevent the cutting blade from detaching from the end of the shaft body.

[0076] As an embodiment, the stop portion includes a sleeve sleeved on the end of the shaft body.

[0077] As an embodiment, a blade separation portion is provided between adjacent blades of the cutting assembly, so that any cutting blade of the cutting assembly is located at different heights of the blade connecting assembly; and the outer surface of the blade separation portion is cylindrical.

[0078] As an embodiment, the blade separation portion and the cutting blade are an inseparable whole.

[0079] As an embodiment, all the cutting blades and blade separation parts of the cutting assembly are integrally formed and cannot be disassembled.

[0080] The embodiment of the present application provides a cutting assembly with multiple layers of cutting blades and a lawn mower including multiple cutting assemblies, wherein the cutting assemblies are circumferentially distributed on the first blade disc of the lawn mower, and the blade connecting assembly of the cutting assembly is detachably mounted on the first blade disc. When the blade connecting assembly is in a connected state with the first blade disc, the driving device drives the first blade disc to rotate, and the first blade disc drives the cutting assembly to rotate, so that the multiple layers of cutting blades cut grass; when the blade connecting assembly is removed from the first blade disc, the entire blade assembly is separated from the first blade disc, that is, the at least two cutting blades arranged at different heights of the blade connecting assembly are also removed at one time. Compared with the prior art, not only the grass-chopping quality and cutting efficiency of the lawn mower are greatly improved, but also multiple cutting blades can be replaced at one time, so that the grass-chopping quality and cutting efficiency of the lawn mower can be improved, and the cutting blades can be simply and quickly removed and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1-1 A possible structural schematic diagram of a cutting assembly provided in an embodiment of the present application;

[0082] Figure 1-2 A schematic diagram of another possible structure of a cutting assembly provided in an embodiment of the present application;

[0083] FIG2 is a possible schematic diagram of a lawn mower provided in an embodiment of the present application;

[0084] Figure 3-1 A schematic diagram of a possible structure of a cutting assembly installed on a cutting device provided in an embodiment of the present application;

[0085] Figure 3-2 A schematic diagram of a structure in which another possible cutting assembly provided in an embodiment of the present application is installed on a cutting device;

[0086] Figure 4-1 , 4-2 A possible structural schematic diagram of a cutting device provided in another embodiment of the present application;

[0087] Figure 5 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0088] Figure 6A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0089] Figure 7-1 , 7-2 7-3 and 7-4 are schematic diagrams of structures of four possible connection modes between the blade connection assembly and the cutter disc provided in another embodiment of the present application;

[0090] Figure 8 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0091] Figure 9-1 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0092] Figure 9-2 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0093] Figure 10-1 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0094] Figure 10-2 , 10-3 A possible structural schematic diagram of a first cutter disc, a cutter disc connecting portion, and a second cutter disc provided in another embodiment of the present application;

[0095] Figure 11-1 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application;

[0096] Figure 11-2 A schematic diagram of another possible structure of a cutting device provided in another embodiment of the present application; DETAILED DESCRIPTION

[0097] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present disclosure, so the present disclosure is not limited by the specific embodiments disclosed below.

[0098] Lawn mowers can be divided into reel mowers, rotary mowers, and sling mowers according to the different mowing methods of the cutting device. The cutting device of a rotary mower usually adopts a single-piece cutting blade, and the middle part of the cutting blade is a connecting part, which is connected to the output shaft of the corresponding driving device of the mower through a fastening device, and the output shaft of the driving device drives the single-piece cutting blade to rotate to cut the lawn. The cutting device of a sling mower usually adopts a single-layer multi-piece cutting blade, and the multi-piece cutting blades are installed at the edge of the blade disc at circumferential intervals. The middle part of the blade disc is a connecting part, which is connected to the output shaft of the corresponding driving device of the mower through a fastening device, and the output shaft of the driving device drives the cutting disc to rotate, thereby driving the cutting blade to swing to cut the lawn.

[0099] In the above-mentioned lawn mower with a single-piece cutting blade or a single-layer cutting blade, the cutting blades are always in the same cutting plane for cutting, and the grass cannot be broken. In order to solve the problem of broken grass, a cutting device with multiple layers of cutting blades can be provided.

[0100] In one embodiment, the cutting device includes a plurality of cutting blades installed at different heights. When the cutting device is driven to rotate, the plurality of cutting blades located at different heights can cut the long grass into multiple sections to achieve the purpose of shredding the grass. These cutting blades need to be installed one by one during installation, and during the installation process, the output shaft of the driving device will hinder the user's operation in space, and adjacent cutting blades will also interfere with the user's operation; when these cutting blades are damaged and replaced, in order to avoid interference between adjacent cutting blades, the adjacent cutting blades that cause interference usually need to be removed before the damaged cutting blades can be disassembled and assembled, which is time-consuming and labor-intensive, and reduces the user's experience.

[0101] It should be noted that this multi-layer cutting blade can be directly mounted on the output shaft of the driving device, or can be mounted on the cutter disc by pressing, and indirectly connected to the output shaft of the driving device through the cutter disc. Taking the cutting device provided with a cutter disc as an example, in one embodiment, the cutting device includes one or more cutter discs installed at different heights and multiple cutting blades arranged at intervals on the cutter disc. Among them, each cutting blade is installed at different positions of the cutter disc or on a cutter disc at different heights by the matching method of bolts and nuts. The cutting device is connected to the output end of the driving device of the lawn mower through a driving connection part, so that the driving device drives the cutting device to rotate to cut grass. Although this multi-layer cutting device solves the problem of grass cutting, it is more complicated to assemble the cutting device because multiple cutter discs and multiple cutting blades need to be installed in sequence; when any one or more of the cutting blades are damaged and need to be replaced with new cutting blades, at least all the bolts and nuts need to be removed, and the corresponding cutter disc and the corresponding cutting blade need to be removed before the new cutting blade can be replaced, and the cutter disc and the cutting blade need to be reinstalled after the replacement is completed.

[0102] It can be seen that this multi-layer cutting device is not convenient for installing and replacing cutting blades, and the more cutting blades need to be replaced and the closer they are to the driving device, the more troublesome the installation and replacement will be.

[0103] Based on this, the present disclosure provides a lawn mower 100 (including a self-propelled lawn mower or a hand-push lawn mower), please refer to Figure 2-1 , 2-2 The lawn mower 100 includes a shell 3, a moving device 4, a driving device 2 and a cutting device 1. The moving device 4 is configured to be connected to the shell 3 and drive the lawn mower 100 to move; the driving device 2 is arranged on the shell 3; the cutting device 1 is connected to the driving device 2 and is configured to perform a cutting task under the drive of the driving device 2.

[0104] The present application does not specifically limit the structure of the moving device (i.e., the walking device 4). For example, the moving device may be a crawler, a roller, etc. Figure 2-1 In the example of the lawn mower 100 provided, the mobile device includes two rear drive wheels and two front driven wheels. It is understandable that the mobile device can also be composed of two front drive wheels and two rear driven wheels, or four drive wheels, or two rear drive wheels and one front driven wheel. The drive device 2 is installed on the housing 3 and is used to provide power to the cutting device 1 of the lawn mower 100 so that the cutting device 1 performs the mowing operation. The present application does not specifically limit the drive device 2. For example, the drive device 2 can be a motor, a diesel engine, a gas engine, etc. Figure 2-2 As shown, in the example of the lawn mower 100 provided in the present application, the driving device 2 includes a motor. Figure 2-2 As shown, the cutting device 1 is connected to the driving device 2 via the driving device output end 20 of the driving device 2 so as to rotate under the drive of the driving device 2 .

[0105] Figure 2-1 , 2-2 This is only a schematic diagram of this embodiment. The present application does not specifically limit the number of cutting devices 1 included in the lawn mower 100. The number of cutting devices 1 can be set according to actual needs. For example, the number of cutting devices 1 can be one, two, or more. Figure 2-1 The present application does not specifically limit the number of cutting components 11 included in the cutting device 1, and the number of cutting components 11 can be set according to the needs. For example, the cutting device 1 can include two cutting components 11 distributed along the circumference of the output shaft, or Figure 2-1 Three cutting assemblies 11 are shown.

[0106] Please refer to Figure 1-1In this embodiment, the cutting device 1 is provided with a cutting assembly 11, which includes a blade connecting assembly 112 and at least two cutting blades 111. The at least two cutting blades 111 are arranged on the blade connecting assembly 112. The cutting assembly 11 is detachably connected to the output end 20 of the driving device 2 through a connecting piece 1120 on the blade connecting assembly 112. In this embodiment, the at least two cutting blades 111 are arranged at different height positions of the blade connecting assembly 112. With such arrangement, when the cutting assembly 11 is installed on the output end 20 of the driving device 2, the plurality of cutting blades 111 are first installed on the independent blade connecting assembly 112. At this time, the blade connecting assembly 112 is not installed on the output end 20 of the driving device, and the output end 20 will not interfere with the installation of the cutting blade 111, which is easy for the user to operate. After the plurality of cutting blades 111 are installed on the blade connecting assembly 112, it is only necessary to operate and install the blade connecting assembly 112 once to install the multi-layer blades on the output end 20; similarly, when the entire cutting assembly 11 is replaced, it is only necessary to operate and disassemble the blade connecting assembly 112 once to complete the replacement of the multi-layer blades. When replacing part of the cutting blades 111, first remove the blade connecting assembly 112 from the output end 20 to avoid interference of the output end 20 with the disassembly of the cutting blade 111, and then disassemble and install the cutting blade 111 on the independent blade connecting assembly 112, thereby realizing quick disassembly and assembly of the cutting assembly 11. It should be noted that the connecting member 1120 is configured as the first limiting portion 1121 mentioned below. The structure of the first limiting portion 1121 will be described in detail below and will not be described again.

[0107] Please refer to Figure 1-2 In other embodiments, at least two cutting blades 111 are arranged at the same height of the blade connection assembly 112, and are detachably connected to the output end of the driving device through the connecting piece on the blade connection assembly. The only difference from the above embodiment is that at least two cutting blades 111 are arranged at the same height of the blade connection assembly 112. It can be understood that multiple cutting blades 111 are connected to the same blade connection assembly 112, and then installed on the output end (or blade disc) through the blade connection assembly 112. When disassembling and assembling multiple cutting blades 111, it is only necessary to disassemble and assemble the entire blade connection assembly 112 from the output end. Disassembly and assembly only require one operation, which is more convenient for users. It should be noted that the cutting blade and the blade cutting assembly can be integrally formed, or can be detachably connected together in other ways, such as threaded connection, clamping, welding, etc.

[0108] The present application does not specifically limit the structure of the blade connection assembly 112. Figure 1-1As shown, the blade connection assembly 112 includes a shaft body 1122 , and the cutting blade 111 includes a mounting hole, and the cutting blade 111 is sleeved on the shaft body 1122 through the mounting hole.

[0109] It should be noted that the present application does not limit the connection method between the blade connecting assembly and the output end 20 of the driving device. The blade connecting assembly can be directly connected to the output end 20, or the blade connecting assembly can be indirectly connected to the output end 20, such as the blade connecting assembly is connected to the blade disc, and the blade disc is connected to the output end 20.

[0110] Please continue to refer to Figure 2-2 In the present embodiment, the cutting device 1 comprises a cutter disc 18, and a cutting component 11 is mounted on the cutter disc 18. The output end 20 of the driving device is matched with the cutter disc 18 to drive the cutting component 11 to rotate for cutting; at least part of the blade connecting component is detachably connected to the cutter disc 18, and the cutting component 11 is detachably connected to the cutter disc 18 via a connecting piece 1120 on the blade connecting component. The cutting component 11 is installed on the cutter disc 18 so that the disassembly position of the cutting component 11 is far away from the output shaft, thereby reducing the interference of the output shaft on the disassembly of the cutting component 11, and making it more convenient for users to disassemble and assemble the cutting component. The present application does not specifically limit the number of cutting components 11 included in the cutting device 1, and the number of cutting components 11 can be set according to demand. In the present embodiment, the cutting device 1 comprises at least two cutting components, and at least two cutting components are distributed along the circumference of the cutter disc 18. For example, the cutting device 1 may comprise two cutting components 11 distributed along the circumference of the cutter disc 18, or as Figure 2-1 The cutting device 1 shown may include three cutting assemblies 11 distributed along the circumference of a blade disc 18. When the driving device 2 drives the cutting device 1 to rotate, the blade disc 18 drives the cutting assemblies 11 to rotate to cut the grass. Figure 2-2 As shown, in the example provided by the present application, the cutting assembly 11 includes a blade connecting assembly 112 and at least two cutting blades 111 arranged at different height positions of the blade connecting assembly 112, so that the cutting assembly 11 can chop grass.

[0111] For further information, please refer to Figure 9-1 , Figure 9-2 In one embodiment, the cutting device further comprises an auxiliary cutting assembly 13 disposed below the cutting assembly 11, and the cutting assembly 11 and the auxiliary cutting assembly 13 are respectively detachably connected to the cutter disc 18. Figure 9-1 , Figure 9-2As shown, in addition to the cutting assembly 11, the cutting device 1 also includes an auxiliary cutting assembly 13, which is detachably mounted below the cutting assembly 11. As can be seen from the natural growth state of grass, the closer the grass stems are to the ground, the thicker and harder they are. Therefore, when the cutting device is mowing the grass, the cutting blades at the bottom are more easily damaged, and the replacement cycle is shorter than that at other locations. The auxiliary cutting assembly 13 is more easily damaged than the cutting assembly 11, so the auxiliary cutting assembly 13 is replaced more frequently than the cutting assembly, and is configured to be detachable and assembled separately. When the auxiliary cutting assembly 13 is damaged but the cutting assembly 11 is not damaged, the user only needs to operate and replace the auxiliary cutting assembly 13, which is more convenient for the user.

[0112] It should be noted that the structures of the cutting assembly 11 and the auxiliary cutting assembly 13 may be the same or different. For example, the cutting assembly 11 includes a blade connection assembly and at least two cutting blades, and the auxiliary cutting assembly 13 includes a single-layer cutting blade; or, the auxiliary cutting assembly 13 includes a blade connection assembly and at least two cutting blades. Figure 9-1 , 9-2 As shown, the cutting assembly 11 is configured as a multi-layer cutting blade structure, and the auxiliary cutting assembly 13 can be configured as a single-layer cutting blade or a multi-layer cutting blade structure.

[0113] That is to say, in this embodiment, the cutting device 1 is provided with a cutting assembly, and the cutting assembly can be connected to the blade disc 18 in different ways.

[0114] In one embodiment, at least two cutting blades are arranged at different height positions of the blade connection assembly 112, and the blade connection assembly 112 has an upper end and a lower end in the height direction of the lawn mower 100 (or the height direction of the blade connection assembly 112 itself), and at least two cutting blades are installed between the upper end and the lower end, and at least the upper end of the upper end and the lower end is connected to the cutter disc 18. The present application does not specifically limit the matching method of the blade connection assembly 112 and the cutter disc 18, as long as the blade connection assembly 112 is detachably mounted on the cutter disc 18, for example, the blade connection assembly 112 can be detachably mounted on the cutter disc 18 by means of snap connection, thread connection, penetration, etc. The present application does not specifically limit the matching position of the blade connection assembly 112 and the cutter disc 18, as long as the cutting assembly 11 where the blade connection assembly 112 is located is arranged on the cutter disc 18 and distributed along the circumference of the cutter disc 18. It should be noted that the height direction of the lawn mower 100 refers to the up and down direction when the lawn mower 100 is placed on a horizontal ground.

[0115] In one embodiment, the blade disc 18 comprises a first blade disc 10, and the blade connection assembly 112 of the cutting assembly 11 is detachably mounted on the first blade disc 10. As an example, see Figure 4-1The upper end of the blade connection assembly 112 is detachably mounted on the first cutter disc 10, and all the cutting blades 111 of the cutting assembly 11 are arranged below the first cutter disc 10. Figure 4-1 The matching position shown is convenient for disassembling and installing the cutting assembly 11, that is, it is convenient for the cutting assembly 11 to be separated from the cutting device 1 from below the first blade disc 10, and it is also convenient for the cutting assembly 11 to be installed on the first blade disc 10 from below the first blade disc 10. In some cases, when the lawn mower needs to replace the cutting blade, and the structure of the cutting assembly 11 satisfies the requirement of replacing a single cutting blade thereon, the above matching position can be used to directly replace the single cutting blade that needs to be replaced without even disassembling the cutting assembly 11 from the first blade disc 10, making disassembly and assembly more convenient.

[0116] The present embodiment provides a cutting device 1 of a lawn mower. When it is necessary to assemble a multi-layer cutting blade to the cutting device 1, it is only necessary to assemble the cutting assembly 11 with the multi-layer cutting blade 111 to the first blade disc 10 of the cutting device 1. When the cutting blade of the cutting device 1 needs to be replaced, it is only necessary to disassemble the blade connection assembly 112 from the first blade disc 10, and the cutting assembly 11 as a whole is separated from the first blade disc 10, and all the cutting blades 111 are also separated from the first blade disc 10 at the same time. At this time, the entire cutting assembly 11 can be replaced. It is only necessary to install the blade connection assembly 112 of the new cutting assembly 11 to the first blade disc 10, so that the replacement of multiple cutting blades can be completed at the same time, and the technical effect of simply and quickly disassembling and replacing the cutting blade can be achieved. After the cutting assembly 11 is separated from the first blade disc 10 as a whole, it is also possible to further disassemble the cutting blade 111 from the blade connection assembly 112 and replace it with a new cutting blade. In this way, any cutting blade on the blade connection assembly 112 can be selectively replaced, such as only replacing the cutting blade with severe wear, while retaining other cutting blades, thereby saving costs.

[0117] In terms of grass cutting, the cutting device 1 includes a first blade disc 10, and also includes at least two cutting assemblies 11 distributed circumferentially on the first blade disc 10. The cutting assembly 11 includes at least two cutting blades 111 and a blade connecting assembly 112. The blade connecting assembly 112 is detachably mounted on the first blade disc 10. The cutting assembly 11 connects the at least two cutting blades 111 together through the blade connecting assembly 112. The at least two cutting blades 111 are located at different heights of the blade connecting assembly 112, so that when the cutting assembly 11 performs grass cutting operations, at least two cutting tracks can be formed in the height direction, which is convenient for cutting long grass and improving the grass cutting quality. When the cutting device 1 performs grass cutting operations, the blade connecting assembly 112 is mounted on the first blade disc 10, and the first blade disc 10 drives the at least two cutting assemblies 11 distributed circumferentially thereon to rotate for cutting. The cutting assembly 11 including at least two cutting blades 111 located at different heights improves the grass cutting quality of the cutting device 1, and the cutting device 1 including at least two cutting assemblies 11 also improves its grass cutting efficiency.

[0118] In another embodiment, the cutter disc 18 includes a first cutter disc 10 and a second cutter disc 12 disposed below the first cutter disc 10, the upper end of the blade connection assembly is connected to the first cutter disc 10, and the lower end is connected to the second cutter disc 12. All cutting blades 111 of the cutting assembly 11 are disposed between the first cutter disc 10 and the second cutter disc 12, the upper end of the blade connection assembly 112 is detachably mounted on the first cutter disc 10, and the lower end of the blade connection assembly 112 is detachably mounted on the second cutter disc 12. The cutting assembly 11 is disposed between the first cutter disc 10 and the second cutter disc 12, which can greatly improve the stability of the cutting assembly 11 when working.

[0119] As an example, the second blade disc 12 is a stainless steel blade disc. Since the second blade disc 12 is the bottom blade disc of the cutting device 1, the second blade disc 12 is most likely to hit obstacles on the ground compared to other parts of the cutting device 1 during the operation of the lawn mower. The use of stainless steel with greater strength and rigidity can reduce the deformation of the second blade disc 12 caused by collision and improve the stability of the second blade disc 12.

[0120] Further, of the first cutter disc 10 and the second cutter disc 12, at least the second cutter disc 12 is detachably connected to the output end 20; the upper end is detachably connected to the first cutter disc 10 and / or the lower end is detachably connected to the second cutter disc 12. In other words, the connection mode between the cutting device 1 and the output end 20 and the connection mode between the cutting assembly and the cutter disc have different combinations.

[0121] In one embodiment, the connection mode between the cutting device 1 and the output end 20 and the connection mode between the cutting assembly and the cutter disc can be that the second cutter disc 12 is detachably connected to the output end 20, the first cutter disc 10 is fixedly connected to the output end 20, the upper end of the blade connection assembly is detachably connected to the first cutter disc 10, and the lower end of the blade connection assembly is fixedly connected to the second cutter disc 12. The first cutter disc 10 itself is fixed on the output shaft, and when the cutting device 1 is installed on the output shaft, the lower end of the blade connection assembly is fixedly connected to the second cutter disc 12, and when the second cutter disc 12 is installed on the output shaft, the upper end of the blade connection assembly is just matched to the corresponding position of the first cutter disc 10. The lower end of the blade connection assembly is fixedly connected to the second cutter disc 12, and the user does not need to manually connect the lower end of the blade connection assembly to the second cutter disc 12, which reduces the installation difficulty of the user. When disassembling the cutting assembly 11, you can first release the connection between the upper end of the blade connecting assembly and the first blade disc 10 (such as uncoupling the screw nut, or uncoupling the cooperating snap-on assembly), and then remove the second blade disc 12 from the output shaft. At this time, the blade connecting assembly is removed from the output end 20 together with the second blade disc 12, and then the multiple cutting blades on the blade assembly are replaced. This can avoid interference with the output end 20 and the first blade disc 10 in the replacement of the cutting assembly 11, and the operation is easier for the user.

[0122] In another embodiment, the connection mode between the cutting device 1 and the output end 20 and the connection mode between the cutting assembly and the cutter disc can also be that the second cutter disc 12 is detachably connected to the output end 20, the first cutter disc 10 is fixedly connected to the output end 20, the upper end of the blade connection assembly is detachably connected to the first cutter disc 10, and the lower end of the blade connection assembly is detachably connected to the second cutter disc 12. The first cutter disc 10 itself is fixed on the output shaft, and when the cutting device 1 is installed on the output shaft, the upper end of the blade connection assembly is matched to the corresponding position of the first cutter disc 10, and the second cutter disc 12 is installed on the output shaft, and the lower end of the blade connection assembly is just matched to the corresponding position of the second cutter disc 12. When disassembling the cutting assembly 11, the connection between the upper end of the blade connecting assembly and the first blade disc 10 can be released first (such as by uncoupling the screw nut, or by uncoupling the cooperating snap-fit ​​assembly), and then the second blade disc 12 can be removed from the output shaft. At this time, the blade connecting assembly together with the second blade disc 12 can be removed from the output end 20, and then the connection between the lower end of the blade connecting assembly and the second blade disc 12 can be released (such as by uncoupling the screw nut, or by uncoupling the cooperating snap-fit ​​assembly), and the replacement operation of the multiple cutting blades on the blade assembly can be completed. In this way, the interference of the output end 20 and the first blade disc 10 and the second blade disc 12 in the replacement of the cutting assembly 11 can be avoided, and the operation is easier for the user.

[0123] In another embodiment, the connection mode between the cutting device 1 and the output end 20 and the connection mode between the cutting assembly and the cutter disc can also be that the second cutter disc 12 is detachably connected to the output end 20, the first cutter disc 10 is also detachably connected to the output end 20, the upper end of the blade connection assembly is detachably connected to the first cutter disc 10, and the lower end of the blade connection assembly is fixedly connected to the second cutter disc 12. When the cutting device 1 is installed on the output shaft, the first cutter disc 10 is installed on the output shaft, the lower end of the blade connection assembly is fixedly connected to the second cutter disc 12, and the second cutter disc 12 is installed on the output shaft, and the upper end of the blade connection assembly is just matched to the corresponding position of the first cutter disc 10. The lower end of the blade connection assembly is fixedly connected to the second cutter disc 12, and the user does not need to manually connect the lower end of the blade connection assembly to the second cutter disc 12, which reduces the installation difficulty of the user. When disassembling the cutting assembly 11, the first blade disc 10 and the second blade disc 12 can be disassembled from the output shaft. At this time, the blade connection assembly can be disassembled from the output end 20 together with the first blade disc 10 and the second blade disc 12. Then, the upper end of the blade connection assembly is disconnected from the first blade disc 10 (such as disengaging the screw nut, or disengaging the mutually matching clamping assembly). The blade connection assembly is fixedly connected to the second blade disc 12. Only the multiple cutting blades on the blade connection assembly can be replaced. In this way, the output end 20 and the first blade disc 10 can be avoided from interfering with the replacement of the cutting assembly 11, which is easier for the user to operate. Of course, when disassembling the cutting assembly 11, the first blade disc 10 can also be removed from the output end 20 instead of being removed from the output end 20. Instead, only the second blade disc 12 and the cutting assembly 11 can be removed from the output end 20 and the first blade disc 10 respectively. In this way, the steps for the user to disassemble the cutting assembly 11 can be simplified.

[0124] In another embodiment, the connection mode between the cutting device 1 and the output end 20 and the connection mode between the cutting assembly and the cutter disc can also be that the second cutter disc 12 is detachably connected to the output end 20, the first cutter disc 10 is also detachably connected to the output end 20, the upper end of the blade connection assembly is detachably connected to the first cutter disc 10, and the lower end of the blade connection assembly is detachably connected to the second cutter disc 12. When the cutting device 1 is installed on the output shaft, the first cutter disc 10 is installed on the output shaft, the upper end of the blade connection assembly is fixedly connected to the first cutter disc 10, the second cutter disc 12 is installed on the output shaft, and the lower end of the blade connection assembly is just matched to the corresponding position of the second cutter disc 12. When disassembling the cutting assembly 11, the first blade disc 10 and the second blade disc 12 can be removed from the output shaft, and then the cutting assembly 11 can be removed from the first blade disc 10 and / or the second blade disc 12 to replace part of the cutting blade or the entire cutting assembly 11. This can effectively avoid the interference of the first blade disc 10, the second blade disc 12 and the output shaft in the replacement of the cutting blade; of course, only the second blade disc 12 can be removed, and the cutting assembly 11 can continue to be connected to the first blade disc 10, and the user can directly replace the cutting blade on the first blade disc 10, or the cutting assembly 11 can be removed together with the second blade disc 12, and the user can directly replace the cutting blade on the second blade disc 12. Such a setting can provide users with more replacement modes, allowing users to freely choose the replacement method that suits them, without restricting the way users replace cutting blades or the entire cutting assembly 11.

[0125] Of course, the connection method between the cutting assembly 11 and the cutter disc is not limited to the above-mentioned embodiment, see Figure 5 The blade connection assembly 112 and the first blade disc 10 are connected at the position where the center of gravity of the blade connection assembly 112 is located. Figure 5 The matching position shown enables the center of gravity of the cutting assembly 11 and the first cutter disc 10 to be approximately located on the same horizontal plane, which can improve the stability of the cutting assembly 11 during operation.

[0126] It should be noted that, in the present embodiment, the connection method between the first cutter disc 10, the second cutter disc 12 and the output shaft is not specifically limited, and they may be connected to the output end 20 of the driving device by stamping, threaded connection or other methods.

[0127] As an example, Figure 6 As shown, the second cutter disc 12 can be fixed to the output end 20 of the drive device by a separate fixing member independent of the fixing member of the first cutter disc 10. It should be noted that "fixed" here means installed by mechanical means, and this installation is reversible, or detachable.

[0128] As another example, Figure 8As shown, the first cutter disc 10 is connected to the output end 20 of the driving device, and the second cutter disc 12 is detachably connected to the first cutter disc 10, thereby being fixed to the output end 20 of the driving device. When the cutting assembly 11 needs to be disassembled, the second cutter disc 12 is first disassembled from the first cutter disc 10, and the cutting assembly 11 can be further disassembled. When installing the cutting device 1, the first cutter disc 10 is first matched with the output end 20 of the driving device, and then the cutting assembly 11 is matched with the first cutter disc 10, and finally the second cutter disc 12 is matched with the cutting assembly 11, and the second cutter disc 12 is matched with the first cutter disc 10. In this way, there is only one matching position between the cutting device 1 and the output end 20 of the driving device, which reduces the difficulty of installation.

[0129] In order to improve the stability between the blades of the cutting device 1 and facilitate installation, in another embodiment, the cutting device 1 further includes a blade connection portion 14 disposed between the first blade 10 and the second blade 12, the first blade 10 is connected above the blade connection portion 14, the second blade 12 is connected below the blade connection portion 14, the blade connection portion 14 is matched with the output end 20 of the driving device, and the blade connection portion is integrally formed with at least one of the first blade and the second blade; or, the blade connection portion is separately disposed from the first blade and the second blade. Connecting the first blade 10 and the second blade 12 together through the blade connection portion can improve the stability of the cutting device during rotation.

[0130] As an example, Figures 10-1 to 10-3 As shown, the cutting device 1 further includes a cutter disc connection portion 14 disposed between the first cutter disc 10 and the second cutter disc 12. The first cutter disc 10 is detachably connected to the upper portion of the cutter disc connection portion 14, and the second cutter disc 12 is detachably connected to the lower portion of the cutter disc connection portion 14. The cutter disc connection portion 14 is connected to the output end 20 of the driving device. When the driving device 1 drives the cutter disc connection portion 14 to rotate, the second cutter disc 12 rotates with the cutter disc connection portion 14.

[0131] As another example, Figure 11-1 , 11-2 As shown, the first cutter disc 10 and the cutter disc connection part 14 can also be manufactured as a non-detachable whole, and the structural member as a whole is fixedly connected to the output end 20 of the drive device by stamping, threading or other means. In other examples, the second cutter disc 12 and the cutter disc connection part 14 can also be manufactured as a non-detachable whole, and the structural member as a whole is fixedly connected to the output end 20 of the drive device by stamping, threading or other means. The first cutter disc 10 and the second cutter disc 12 and the cutter disc connection part 14 can also be manufactured as a non-detachable whole, and the structural member as a whole is fixedly connected to the output end 20 of the drive device by stamping, threading or other means.

[0132] The present application does not specifically limit the structures of the first cutter disc 10, the second cutter disc 12, and the cutter disc connecting portion 14. Figures 10-1 to 10-3 As shown, the first cutter disc 10 includes a boss in the middle and a hole-like structure in the middle of the boss, the cutter disc connection part 14 includes a corresponding boss in the middle and a hole-like structure in the middle of the boss, and the middle boss of the first cutter disc 10 is matched with the middle boss of the cutter disc connection part 14. The distance B1 from the matching position of the bottom of the first cutter disc 10 and the blade connection component 112 of the cutting component 11 to the output end 20 of the drive device is greater than the distance B0 from the outer edge of the bottom of the cutter disc connection part 14 to the output end 20 of the drive device; correspondingly, the distance B2 from the matching position of the bottom of the second cutter disc 12 and the blade connection component 112 of the cutting component 11 to the output end 20 of the drive device is greater than the distance B0 from the outer edge of the bottom of the cutter disc connection part 14 to the output end 20 of the drive device. The second cutter disc 12 includes a sink located in the middle of the second cutter disc 12 that matches the bottom of the cutter disc connection part 14.

[0133] The present application does not make specific limitations on the matching structure between the first cutter disc 10, the cutter disc connection part 14, and the second cutter disc 12, and the matching structure between the cutter disc connection part 14 and the output end 20 of the drive device. The drive device 1 also includes a matching module 21 matched with the cutter disc connection part 14, and the matching module 21 is fixedly connected to the output end 20 of the drive device by stamping, threaded connection or other methods. The matching module 21 is evenly provided with at least two threaded holes along the circumference, and correspondingly, the middle boss of the first cutter disc 10 is evenly provided with at least two threaded holes or through holes along the circumference, and the middle boss of the cutter disc connection part 14 is evenly provided with at least two threaded holes or through holes along the circumference. The bottom of the cutter disc connection part 14 is evenly provided with at least two threaded holes along the circumference, and correspondingly, the sink of the second cutter disc 12 is evenly provided with at least two threaded holes or through holes along the circumference. When the cutting device 1 needs to be assembled to the driving device 2, firstly, the bottom of the first cutter disc 10 is facing upwards and the boss is facing downwards, and the first cutter disc 10 is sleeved onto the output end 20 of the driving device through the hole-shaped structure in the middle of the boss, so that the inner surface of the boss of the first cutter disc 10 abuts against the lower surface of the matching module 21; then, the cutter disc connecting part 14 is sleeved onto the output end 20 of the driving device through the hole-shaped structure in the middle of the boss, with the boss of the cutter disc connecting part 14 facing upwards and the bottom facing downwards, so that the outer surface of the boss of the cutter disc connecting part 14 abuts against the lower surface of the matching module 21. The outer surface of the boss of the first cutter disc 10 is abutted; then the first cutter disc 10, the cutter disc connecting part 14 and the matching module 21 are fixed by bolt connection; then one end of the blade connecting component 112 of the cutting component 11 is matched to the bottom of the first cutter disc 10, and then the groove of the second cutter disc 12 is clamped to the bottom of the cutter disc connecting part 14, at this time, the other end of the blade connecting component 112 of the cutting component 11 is just matched to the corresponding position of the second cutter disc 12; finally, the second cutter disc 12 is fixed to the cutter disc connecting part 14 by bolt connection.

[0134] With the above solution, firstly, only one adapter module 21 is required to be provided on the output end 20 of the driving device, and the cutting device 1 can be installed on the driving device 2, which reduces the difficulty of installation. In addition, the first cutting disc 10 and the second cutting disc 12 are connected together by the cutting disc connection part 14, which increases the stability of the cutting device 1.

[0135] By adopting the above scheme, when an auxiliary cutting assembly 13 is installed under the second cutter disc 12, when the auxiliary cutting assembly 13 needs to be replaced, the auxiliary cutting assembly 13 is directly removed from the second cutter disc 12, and then a new auxiliary cutting assembly 13 is installed under the second cutter disc 12, or the second cutter disc 12 is removed from the cutter disc connecting portion 14, and then the auxiliary cutting assembly 13 is removed from the second cutter disc 12, and then a new auxiliary cutting assembly 13 is installed under the second cutter disc 12, and finally the second cutter disc 12 is installed back to its original position; when the cutting assembly 11 needs to be replaced, the second cutter disc 12 is removed from the cutter disc connecting portion 14, and then the cutting assembly 11 is removed from the first cutter disc 10, the new cutting assembly 11 is replaced, and then the second cutter disc 12 is installed back to its original position.

[0136] As an example, Figure 11-1 As shown, the first cutter head 10 and the cutter head connecting portion 14 can also be manufactured as an integral and non-detachable whole, and as an integral structural member, they are matched with the matching module 21. Or, as another example, Figure 11-2 As shown, the first cutter disc 10 and the cutter disc connecting portion 14 are fixedly connected to the output end 20 of the driving device by stamping, threading or other means as an integral structure.

[0137] For further information, please refer to Figure 9-2 , the connection position of the cutting assembly 11 with the first and second cutter discs is outside the maximum outer edge of the cutter disc connection part. The maximum distance Y1 between the outer edge of the cutter disc connection part 14 and the output end 20 of the drive device is less than the minimum distance Y2 between the blade connection component 112 of the cutting assembly 11 and the output end 20 of the drive device, that is, the connection position of the cutting assembly 11 with the first and second cutter discs 10 and 12 is outside the maximum outer edge of the cutter disc connection part 14. This is set to prevent the cutter disc connection part 14 from hindering the cutting assembly 11 from being removed from under the first cutter disc 10 when replacing the cutting assembly 11, so as to facilitate the replacement of the cutting assembly 11.

[0138] For further information, please refer to Figure 11-1 or Figure 11-2A closed space 124 is formed between the second blade disc 12 and the blade disc connection portion, and the closed space 124 accommodates the output end 20 to prevent the output end 20 from being exposed to the environment in which the cutting device 1 is mowing. The closed space 124 formed by the second blade disc 12 and the blade disc connection portion 14 covers the output end 20, preventing grass clippings from flying into the output end 20 of the drive device during mowing, causing the drive device 1 to wear or get stuck.

[0139] It should be noted that the present application does not specifically limit the detachable matching method of the blade connection component 112 and the first blade disc 10 or the second blade disc 12, as long as it is ensured that the first blade disc 10 or the second blade disc 12 can be detached from the cutting component 11. For example, the blade connection component 112 can be detachably installed on the first blade disc 10 or the second blade disc 12 by means of snap connection, thread connection, or penetration.

[0140] As an example, see Figure 6 The two ends (upper end and lower end) of the blade connection assembly of the cutting assembly 11 are detachably connected to the first cutter disc 10 and the second cutter disc 12. The two ends of the blade connection assembly 112 are provided with a first limiting portion 1121, and the first cutter disc 10 and the second cutter disc 12 are respectively provided with a second limiting portion 101 and a third limiting portion 121 matched with the first limiting portion 1121, so that the cutting assembly 11 is passed through the two ends of the blade connection assembly 112 and is arranged between the first cutter disc 10 and the second cutter disc 12. When the cutting device 1 needs to be installed on the driving device 2 of the lawn mower, the first blade disc 10 is first installed on the output end 20 of the driving device, and then the first limiting portion 1121 set at one end of the blade connecting component 112 of the cutting component 11 is inserted into the second limiting portion 101 of the first blade disc 10, and then the third limiting portion 121 of the second blade disc 12 is matched with the first limiting portion 1121 set at the other end of the blade connecting component 112, so that the first limiting portion 1121 at the other end of the blade connecting component 112 is just inserted into the third limiting portion 121 of the second blade disc 12, and then the second blade disc 12 is fixed to the output end 20 of the driving device. When the cutting blade needs to be replaced, since the two ends of the blade connecting component 112 are inserted between the first blade disc 10 and the second blade disc 12, as long as the second blade disc 12 is removed from the output end 20 of the driving device, the second blade disc 12 can be detached from the bottom of the cutting component 11, and then all the cutting components 11 can be detached from the first blade disc 10. By adopting the above technical solution, when the cutting blade needs to be replaced, it is only necessary to remove the second cutter disc 12 from the output end 20 of the drive device, and then all the cutting components 11 can be removed and replaced with new cutting components 11, thereby achieving the effect of convenient and quick replacement of the cutting blade.

[0141] The present application does not specifically limit the blade connection assembly 112 and the first limiting portions 1121 at both ends thereof, as well as the second limiting portions 101 and the third limiting portions 121 matched with the first limiting portions 1121. It is sufficient to ensure that both ends of the blade connection assembly 112 of the cutting assembly 11 are detachably installed between the first blade disc 10 and the second blade disc 12 by means of snap connection, thread connection, or threading. As an example, Figure 7-1 As shown, the two ends of the blade connection component 112 are shaft bodies, the first limiting portion 1121 can be a shaft shoulder set at the two ends of the blade connection component 112, and the second limiting portion 101 and the third limiting portion 121 are hole-like structures matched with the first limiting portion 1121. When installing the cutting component 11, it is only necessary to insert the first limiting portions 1121 at the two ends of the blade connection component 112 into the second limiting portion 101 and the third limiting portion 121 respectively. The structure is simple and easy to install. When disassembling the cutting component 11, after the second blade disc 12 is separated from the bottom of the cutting component 11, the cutting component 11 can be directly removed from the first blade disc 10, which is convenient and quick. In addition, as Figure 7-2 As shown in FIG. 1 , when the two ends of the blade connection component 112 are shaft bodies, the first limit portion 1121 can also be a truncated cone disposed at the two ends of the blade connection component 112, and the second limit portion 101 and the third limit portion 121 are hole-shaped structures matched with the first limit portion 1121. The first limit portions 1121 at the two ends of the blade connection component 112 can also adopt different structures, such as Figure 7-3 As shown, the first limiting portion 1121 at one end matched with the second limiting portion 101 is a threaded structure, and the second limiting portion 101 matched therewith is a threaded hole, while the first limiting portion 1121 at one end matched with the third limiting portion 121 is a shoulder arranged at one end of the blade connection assembly 112, and the third limiting portion 121 matched therewith is a hole-shaped structure. Figure 7-4 As shown, the first limiting portion 1121 may also be a buckle structure, and the second limiting portion 101 and the third limiting portion 121 are slot structures matched therewith.

[0142] It is mentioned above that the cutting device may also be provided with an auxiliary cutting assembly 13. In one embodiment, when the cutting device comprises the cutting assembly 11 and the auxiliary cutting assembly 13, the auxiliary cutting assembly 13 is connected below the second cutter disc.

[0143] Over a period of time, the wear degree of the auxiliary cutting assembly 13 is higher than that of the cutting assembly 11, that is, the replacement frequency of the auxiliary cutting assembly 13 is greater than that of the cutting assembly 11. The cutting assembly 11 and the auxiliary cutting assembly 13 are respectively arranged above and below the second cutter disc 12. When the auxiliary cutting assembly 13 needs to be replaced, the auxiliary cutting assembly 13 is directly removed from the second cutter disc 12, and then a new auxiliary cutting assembly 13 is installed below the second cutter disc 12. Alternatively, the second cutter disc 12 is first removed from the output end 20 of the drive device or from the first cutter disc 10, and then the auxiliary cutting assembly 13 is removed from the second cutter disc 12, and then a new auxiliary cutting assembly 13 is installed below the second cutter disc 12. When the cutting assembly 11 needs to be replaced, the second cutter disc 12 is removed from the output end 20 of the drive device or from the first cutter disc 10, and then the cutting assembly 11 is removed from the first cutter disc 10, and a new cutting assembly 11 is replaced, and then the second cutter disc 12 is installed back to its original position. Such an arrangement makes it possible to replace the cutting assembly 11 and the second blade disc 12 without disassembling and reinstalling the cutting assembly 11 and the second blade disc 12 when replacing the auxiliary cutting assembly 13 with a shorter replacement cycle, and to replace the cutting assembly 11 with a longer replacement cycle without disassembling and reinstalling the second cutting assembly from the second blade disc 12. This not only meets the replacement requirements of cutting assemblies with different replacement cycles, but also simplifies the operation of replacing the cutting assemblies.

[0144] The present application does not specifically limit the number of the auxiliary cutting components 13 of the cutting device 1, nor does it specifically limit the distribution positions of the auxiliary cutting components 13 on the second blade 12. Figure 9-1 As shown, the number of auxiliary cutting assemblies 13 is equal to that of cutting assemblies 11, and the distribution phase of the second cutting blades 131 of the auxiliary cutting assemblies 13 along the second cutter disc 12 is the same as that of the cutting blades 111 of the cutting assembly. The cutting device 1 can be load balanced during operation to reduce the power consumption of the driving device.

[0145] The present application does not specifically limit the structure of the auxiliary cutting assembly 13. Figure 9-1 As shown, the auxiliary cutting assembly 13 includes at least two second cutting blades 131 distributed along the circumference of the second cutter disc 12, and the second cutting blades 131 are detachably mounted below the second cutter disc 12. Figure 9-2As shown, at least two cutting assemblies with similar structures to the cutting assembly 11 (i.e., having a blade connection assembly and multiple cutting blades installed at different heights of the blade connection assembly) can also be arranged below the second cutter disc 12 as auxiliary cutting assemblies 13. The cutting assemblies 11 are distributed circumferentially along the second cutter disc 12, and the blade connection assembly of the second cutting assembly is detachably mounted below the second cutter disc 12. When the auxiliary cutting assembly 13 has a blade connection assembly and multiple cutting blades installed at different heights of the blade connection assembly, the auxiliary cutting assembly 13 can be separately connected below the second cutter disc 12, or a third cutter disc can be continuously arranged on the cutting device, and the second cutting assembly is connected between the second cutter disc 12 and the third cutter disc. The specific connection method is the same as the connection method of the cutting assembly mentioned above, and will not be repeated here. As an example, the third cutter disc is detachably mounted below the auxiliary cutting assembly 13, and the cutting device 1 also includes a third cutting assembly, which is detachably mounted below the third cutter disc.

[0146] The present application does not specifically limit the matching method of the cutting blade 111 and the blade connecting assembly 112. It is sufficient to ensure that the cutting blade 111 is set at different heights of the blade connecting assembly 112. The cutting blade 111 can be set at different heights of the blade connecting assembly 112 by means of snap-on, sleeve setting, etc.

[0147] In one embodiment, please refer to Figure 1-1 At least two cutting blades are detachably connected to the blade connection assembly. A plurality of cutting blades can be integrally mounted and detached from the blade connection assembly, or a plurality of cutting blades can be separately mounted and detached from the blade connection assembly.

[0148] As an example, the blade connection assembly includes a shaft 1122, and the cutting blade is rotatably sleeved on the shaft 1122. A first mounting hole 1111 is provided on the cutting blade, and the cutting blade is sleeved on the shaft 1122 or removed from the shaft 1122 through the first mounting hole 1111. When the plurality of cutting blades are detachable relative to the blade connection assembly, the user can remove the cutting blade 111 from the blade connection assembly 112 and replace it with a new cutting blade. In this way, any cutting blade on the blade connection assembly 112 can be selectively replaced, for example, only the cutting blade with severe wear is replaced, while other cutting blades are retained, thereby saving costs.

[0149] In one embodiment, the cutting blade 111 and the blade connecting assembly 112 are configured to be clearance-fitted, and the cutting blade 111 moves radially and / or axially along the blade connecting assembly. That is, the cutting blade 111 can move left and right and / or up and down relative to the blade connecting assembly. As an example, the blade connecting assembly 112 includes a shaft 1122, and the cutting blade is rotatably sleeved on the shaft 1122. A first mounting hole 1111 is provided on the cutting blade, and the cutting blade is sleeved on the shaft 1122 through the first mounting hole 1111. The diameter of the first mounting hole 1111 is larger than the diameter of the shaft 1122, so that there is a radial gap between the cutting blade and the shaft 1122, thereby enabling the cutting blade to slide up and down on the shaft 1122 and rotate left and right.

[0150] When the rotation speed of the cutting blade of a rotary blade cutting device (i.e., a cutting device in which the cutting blade cannot move relative to the blade disc or the output shaft) is high, the resistance borne by the output end of the driving device is large, so the energy consumption is large, and when the cutting blade accidentally collides with a hard obstacle, the cutting blade is easily damaged by the obstacle. If a human body or an animal accidentally collides with the cutting blade, the danger is also high. The cutting blade of the cutting component 11 and its blade connecting component are set to a clearance fit. When the cutting component 11 is applied to a lawn mower to perform a lawn mowing operation, the cutting blade can move left and right and up and down. During the cutting operation, the cutting blade rotates in a direction away from the center of rotation under the action of centrifugal force, and when the cutting blade hits an obstacle such as a stone or a branch, it can rotate freely to avoid damage, thereby reducing maintenance costs. In addition, this swinging blade cutting component has a sharp blade, requires little power, and has low energy consumption.

[0151] In one embodiment, please continue to refer to Figure 1-1 The blade connection assembly is provided with a blade separation portion 114 at different heights. The blade separation portion 114 is located between adjacent cutting blades so that at least two cutting blades are separated at different heights. The present application does not specifically limit the structure of the blade separation portion 114. Figure 1-1 As shown, the outer surface of the blade separation part 114 is cylindrical. The cylindrical outer surface can reduce the friction between the blade separation part 114 and the grass, thereby reducing the resistance of the lawn mower during travel, reducing the wear of the blade separation part 114, and extending the service life of the cutting assembly.

[0152] In order to facilitate the removal or installation of multiple cutting blades on the blade connection assembly from the shaft 1122, the blade separation portion 114 is also configured to be detachably connected to the blade connection assembly. As an example, the blade connection assembly includes a shaft 1122, and the cutting blade is rotatably sleeved on the shaft 1122; the blade separation portion 114 is sleeved on the shaft 1122. When the cutting blade needs to be removed from the blade connection assembly, the cutting blade 111 and the blade separation portion 114 are removed from the shaft 1122 in sequence; similarly, when the cutting blade 111 is installed in the blade connection assembly, the cutting blade 111 and the blade separation portion 114 are sleeved on the shaft 1122 in sequence.

[0153] The cutting blade is provided with a first mounting hole 1111, through which the cutting blade 111 is sleeved on the shaft body 1122, and the blade separation portion 114 is provided with a second mounting hole 1141, through which the blade separation portion 114 is sleeved on the shaft body 1122, and the inner diameters of the first mounting hole 1111 and the second mounting hole 1141 are greater than the outer diameter of the shaft body 1122. When the blade connection assembly 112 includes the shaft body 1122, the inner diameter of the first mounting hole 1111 of the cutting blade 111 is greater than the outer diameter of the shaft body 1122, so that the cutting blade 111 can move left and right and up and down on the shaft body 1122. In order to facilitate the disassembly and assembly of the multi-layer cutting blades, the blade separation part 114 is also arranged to be a structure that can be removed from the shaft body 1122. The inner diameter of the second mounting hole 1141 of the blade separation part 114 is larger than the outer diameter of the above-mentioned shaft body 1122, so that the blade separation part 114 can be freely inserted into or removed from the shaft body 1122, so as to facilitate the replacement of one or several multi-layer blades.

[0154] like Figure 1-1 As shown, the blade separation part 114 is a sleeve with a smooth outer surface, and the blade connection assembly 112 includes a shaft body 1122, and the inner diameter of the sleeve is larger than the outer diameter of the shaft body 1122. The cutting blade 111 and the blade separation part 114 include mounting holes (i.e., a first mounting hole 1111 and a second mounting hole 1141), and the inner diameter of the mounting hole is also larger than the outer diameter of the shaft body 1122. The blade separation part 114 and the cutting blade 111 are sequentially spaced and sleeved on the shaft body 1122.

[0155] In one embodiment, part of the blade separation portion 114 and the cutting blade 111 can be a non-detachable whole. For example, a group of adjacent blade separation portions 114 and the cutting blade are a whole and cannot be detached. Multiple groups of blade separation portions 114 and cutting blades can be removed from or installed on the shaft 1122 respectively.

[0156] In another embodiment, all the cutting blades and blade separation parts of the cutting assembly can be a non-detachable whole, and the whole including all the cutting blades and blade separation parts can be removed from or installed on the shaft body 1122.

[0157] Furthermore, the shaft body 1122 has an upper end and a lower end in the height direction of the lawn mower, at least two cutting blades are installed between the upper end and the lower end, at least one of the upper end and the lower end is detachably or fixedly connected with a stopper, and the size of the stopper along the radial direction of the shaft body 1122 is larger than the inner diameter of at least one of the first mounting hole 1111 and the second mounting hole 1141. In this way, when the cutting blade is disassembled from the shaft body, the cutting blade and the blade separation part 114 can be prevented from being separated from the shaft body 1122, avoiding difficulty in operation for the user.

[0158] It should be noted that, in the height direction of the blade connection assembly 112, when the cutting blade is located at the bottom layer, the radial dimension of the stop portion along the shaft body 1122 is larger than the first mounting hole 1111, which can ensure that the cutting blade and the blade separation portion 114 do not fall off the shaft body 1122. Similarly, when the cutting blade separation portion 114 is located at the bottom layer, the radial dimension of the stop portion along the shaft body 1122 is larger than the second mounting hole 1141, which can ensure that the cutting blade and the blade separation portion 114 do not fall off the shaft body 1122. The radial dimension of the stop portion along the shaft body 1122 is larger than the first mounting hole 1111 and the second mounting hole 1141, which can also ensure that the cutting blade and the blade separation portion 114 do not fall off the shaft body 1122.

[0159] Continue to see Figure 1-1 The blade connection assembly 112 is a shaft body, and a stopper 113 is provided at one end or both ends (at least one of the upper end and the lower end) of the shaft body 1122. The stopper 113 is detachably or fixedly provided at the end of the shaft body 1122, and the cutting blade 111 is provided inside the end of the shaft body 1122. The size of the stopper 113 along the circumference of the shaft body 1122 is larger than the inner diameter of the mounting hole of the cutting blade 111, so as to prevent the cutting blade from detaching from the end of the shaft body 1122. As an example, the stopper 113 is detachably connected to the end of the shaft body 1122, and is connected to the shaft body 1122 by one of interference connection (that is, the outer diameter of the stopper is slightly larger than the inner diameter of the shaft body, and the stopper can be clamped with the shaft body when it is sleeved on the shaft body), threaded connection or clamping. This detachable connection mode is convenient for the user to detach and assemble the cutting blade from the shaft body 1122. When disassembling, applying external force to the stopper 13 can release the matching relationship between the stopper and the shaft body 1122, and remove the stopper from the shaft body 1122. At this time, it is convenient for the user to remove the blade separation part and the cutting blade on the shaft body 1122. As for the end of the stopper 113 fixedly connected to the shaft body 1122, it can be welded or the stopper and the shaft body 1122 can be integrally formed.

[0160] When the blade separation portion 114 and the cutting blade 111 are sequentially and spaced apart on the shaft body 1122, and the stop portion 113 is detachably mounted on the end of the shaft body 1122, or only one end of the two ends of the shaft body 1122 is connected with the stop portion 113, or the stop portions 113 are not arranged at both ends of the shaft body 1122, after the cutting assembly 11 is removed from the lawn mower, the cutting blade 111 and the blade separation portion 114 can be further detached from the shaft body 1122 of the cutting assembly 11. At this time, any cutting blade on the blade connection assembly 112 can be selectively replaced, for example, only the cutting blade with more severe wear can be replaced, while other cutting blades can be retained, thereby saving costs. When only one end of the shaft 1122 is connected with the stopper 113, or the two ends of the shaft 1122 are not provided with the stopper 113, at this time, since the cutting blade 111 and the blade separation part 114 only need to be sequentially and spacedly sleeved on the shaft 1122 as the blade connection component during installation, when disassembling, after the cutting component 11 is disassembled from the lawn mower, it is only necessary to gently move the cutting blade on the cutting component 11 that needs to be replaced along the shaft 1122 to remove the cutting blade from the end where the stopper 113 is not provided. At this time, although other cutting blades that do not need to be replaced and the corresponding blade separation part 114 located at the same end as the cutting blade may be removed together, the whole process does not require other additional complicated operations; after replacing the cutting blade, all the removed cutting blades and blade separation parts 114 are sleeved back on the shaft 1122. It is very convenient and quick to install, disassemble and replace the cutting blade. When both ends of the shaft body 1122 are provided with a stop portion 113, and the stop portion 113 at at least one end is removable, when the cutting blade needs to be replaced, in addition to choosing to replace the entire cutting assembly 11, you can still choose to remove the detachable stop portion 113 and then replace a single cutting blade according to the above process.

[0161] As mentioned above, in some cases, when the lawn mower needs to replace the cutting blade, the single cutting blade that needs to be replaced can be directly replaced without removing the cutting assembly 11 from the first blade disc 10. As an example, the cutting assembly 11 is detachably mounted below the first blade disc 10 through one end of the blade connecting assembly 112, and the blade connecting assembly 112 is a shaft 1122, and the other end of the shaft 1122 is detachably connected to a stopper 113. When replacing the cutting blade, it is not necessary to remove the cutting assembly 11 from the first blade disc 10, but only to remove the stopper 113 at the other end of the shaft 1122, so that the cutting blade 111 can be separated from the shaft 1122, and then replaced with a new cutting blade.

[0162] As mentioned above, the cutting assembly 11 can be installed as a whole on the cutting device 1 or removed from the cutting device 1. As an example, both ends of the shaft 1122 are provided with stoppers 113. When replacing the cutting blade, the cutting assembly 11 is removed from the first blade disc 10 and replaced with a new cutting assembly 11. This solution of replacing the cutting assembly 11 as a whole can effectively save the time of disassembling and replacing the cutting blade, simplify the replacement steps, and is convenient and quick.

[0163] When the blade connection component 112 is a shaft 1122, and both ends of the shaft 1122 are provided with a first limiting portion 1121 and a stop portion 113, Figure 8 As shown, the first limit portion 1121 is located at the outer end of the shaft body 1122, the stop portion 113 is located at the inner end, and the cutting blade 111 is located inside the end of the shaft body 1122. The first limit portion 1121 and the stop portion 113 can be the same component, which can prevent the cutting blade 111 from detaching from the shaft body 1122 and can be matched with the second limit portion 101 of the first blade disc 10 and the third limit portion 121 of the second blade disc 12, so that the component structure can be simplified and the cost can be saved.

[0164] The present application does not specifically limit the structure of the stopper 113 , and the stopper 113 may be a sleeve sleeved on the end of the shaft body 1122 .

[0165] In one embodiment, the maximum distance that the cutting blade 111 moves up and down relative to the blade connecting assembly 112 is greater than zero and less than or equal to 1.6 mm. If the distance that the cutting blade 151 moves up and down relative to the blade connecting assembly 152 is too large, when the cutting assembly 11 is used to mow grass, grass clippings will fly into the gap between the cutting blade 111 and the blade connecting assembly 112, thereby causing the problem of the blade being stuck and affecting the normal operation of the cutting assembly 11. Therefore, it is necessary to control the distance that the cutting blade 111 can move up and down, and the above distance should be minimized while ensuring that the cutting blade 111 can rotate freely when encountering an obstacle. Experiments have shown that when the maximum distance that the cutting blade 111 moves up and down relative to the blade connecting assembly 112 is controlled within a range greater than 0 and less than 1.6 mm, the cutting assembly 11 can prevent obstacles from damaging the cutting blade 111 and will not cause the blade to be stuck. The above maximum distance can be controlled at 0.7 mm.

[0166] As an example, see Figure 1-1The blade connection assembly 112 is a shaft 1122, and the cutting blade 111 includes a first mounting hole 1111. The cutting blade 111 is sleeved on the shaft 1122 through the first mounting hole 1111. The inner diameter of the first mounting hole 1111 is larger than the outer diameter of the shaft 1122. The cutting blade 111 can move left and right on the shaft 1122. Stops 113 are provided at both ends of the shaft 1122, and the cutting blade 111 is arranged within the length defined by the stoppers 113 at both ends of the shaft 1122. Figure 1-1 As shown, when the cutting assembly 11 is placed vertically in a natural state, the distance between the lower surface of the stop portion at the upper end of the cutting assembly 11 and the upper surface of the stop portion at the lower end of the cutting assembly 11 is defined as A1, and the distance between the cutting blade at the uppermost end of the cutting assembly 11 and the cutting blade at the lowermost end of the cutting assembly 11 is defined as A2. Then, the maximum distance that each cutting blade of the cutting assembly 11 moves up and down relative to the blade connecting assembly 112 is A0, and A0=A1-A2. 0<<A0<<1.6mm, A0=0.7mm.

[0167] like Figure 3-1 , 3-2 FIG. 1 is a schematic diagram showing a cutting assembly 11 of the present application installed on a cutting device 1 of a lawn mower. Figure 3-1 , 3-2 In the figure, the blade connecting component 112 is a shaft body 1122, and the cutting blade 111 includes a first mounting hole 1111, which is sleeved on the shaft body 1122 through the first mounting hole 1111. The inner diameter of the first mounting hole 1111 is larger than the outer diameter of the shaft body 1122, and the cutting blade 111 can move left and right on the shaft body 1122; the blade separation part 114 has a second mounting hole 1141 and is a sleeve with a smooth outer surface. The inner diameter of the sleeve is larger than the outer diameter of the shaft body 1122, and the sleeve can move up and down on the shaft body 1122.

[0168] Continue to see Figure 3-1 At this time, no stopper is provided at both ends of the blade connection assembly 112, and the two ends of the blade connection assembly 112 are detachably mounted on the cutter disc of the cutting device 1 by means of through-and-clip connection. A1 is the distance between the inner surfaces of the cutter disc on which the cutting assembly 11 is mounted; A2 is the distance between the cutting blade at the uppermost end of the cutting assembly 11 and the cutting blade at the lowermost end of the cutting assembly 11 when the cutting device 1 is placed vertically in a natural state, then the maximum distance that each cutting blade of the cutting assembly 11 moves up and down relative to the blade connection assembly 112 is A0, A0=A1-A2. 0<<A0<<1.6mm, A0=0.7mm.

[0169] Continue to see Figure 3-2As shown, at this time, a stopper is provided at the lower end of the blade connecting component 112, A1 is the distance between the inner surface of the upper blade disc on which the cutting component 11 is installed and the upper surface of the stopper at the lower end of the blade connecting component 112; A2 is the distance between the cutting blade at the uppermost end of the cutting component 11 and the cutting blade at the lowermost end of the cutting component 11 when the cutting device 1 is placed vertically in the natural state, then the maximum distance that each cutting blade of the cutting component 11 moves up and down relative to the blade connecting component 112 is A0, A 0＝ A1-A2. 0<<A0<<1.6mm, A0=0.7mm.

[0170] In one embodiment, in the radial direction of the output shaft, an escape space 16 is formed between the cutter disc and the blade connection assembly so that the cutter disc can avoid the impact of the cutting blade 111 when it moves left and right relative to the blade connection assembly. Figure 11-1 The avoidance space 16 is configured as a groove formed by the first cutter disc 10 and the second cutter disc 12 being recessed in the direction of the output shaft. When the cutting blade collides with an obstacle, it can rotate around the rotating shaft body 1122. During the rotation process, the cutting blade passes through the groove to avoid hitting the first cutter disc 10 or the second cutter disc 12. Specifically, the length of the groove in the radial direction of the output shaft is greater than the sweep radius of the cutting blade rotating around the shaft body 1122.

[0171] In one embodiment, in two adjacent layers of cutting blades in the height direction of the lawn mower, the diameter of the cutting track of the cutting blade located in the upper layer is greater than the diameter of the cutting track of the cutting blade located in the lower layer. The present application does not specifically limit the number of cutting blades 111 of the cutting assembly 11, the number of cutting blades 111 can be 2-6, and the number of cutting blades 111 can be 4 or 5. In any two adjacent layers of cutting blades in the cutting device 1, the diameter of the cutting track of the cutting blade located in the upper layer can be greater than the diameter of the cutting track of the cutting blade located in the lower layer. When performing the cutting operation, the cutting blades in the upper layer will cut the grass first, and then the cutting blades in the lower layer will cut the grass again, thereby realizing multiple cuttings of the grass in the same position from high to low at different heights in sequence, preventing the grass from falling directly to the ground and being unable to be cut after the roots of the grass are cut off before the upper part of the grass.

[0172] As an example, the mating positions of the cutting blades 111 of the cutting assembly 11 and the blade connecting assembly 112 can be connected to form a straight line. Figure 5, the straight line forms an acute angle with the rotation center axis of the first blade disc 10, and the straight line gradually approaches the rotation center axis from top to bottom in the height direction. At this time, the lengths of the cutting blades 111 of the cutting assembly 11 are the same. By adopting the above scheme, the diameter of the cutting track of the cutting blade located at the upper layer is greater than the diameter of the cutting track of the cutting blade located at the lower layer. When performing the cutting operation, the cutting blade at the upper layer will cut the grass first, and then the cutting blade at the lower layer will cut the grass again, thereby realizing multiple cutting of the grass at the same position to achieve the purpose of shredding the grass. In addition, the lengths of the cutting blades are the same, which is conducive to unified manufacturing and saves manufacturing costs.

[0173] As another example, see Figure 4-1 Or 9-1, the straight line is parallel to the rotation center axis of the first blade disc 10, and the length of each cutting blade of the cutting assembly 11 gradually shortens from top to bottom in the height direction. In this way, the diameter of the cutting track of the cutting blade located at the upper layer can be larger than the diameter of the cutting track of the cutting blade located at the lower layer, so as to achieve the purpose of cutting grass.

[0174] Furthermore, in the radial direction of the output end 20, the bottom cutting blade of the cutting device 1 extends beyond the outer edge of the blade disc, and the length L of the bottom cutting blade extending beyond the outer edge of the blade disc is greater than or equal to the single cutting amount X0 of the bottom cutting blade. The single cutting amount X0 of the bottom cutting blade is the length of the portion of the cutting blade that contacts the grass during a single cutting process. This arrangement can improve the grass chopping effect and the smoothness of the lawn cutting. For example, the cutting assembly has a cutting assembly and a second cutting assembly. Please refer to Figure 9-1 The bottommost cutting blade of the cutting device 1 is the cutting blade of the second cutting assembly (i.e., the second cutting blade) disposed below the second blade disc 12. The second cutting blade 131 of the auxiliary cutting assembly 13 extends out of one end of the second blade disc 12, and the distance L between the second cutting blade 131 and the outer edge of the second blade disc 12 is greater than or equal to the single cutting amount X0 of the second cutting blade 131. The following is a detailed explanation with reference to the accompanying drawings.

[0175] For a single cutting amount of the second cutting blade 131, when performing the cutting operation, the rotation speed of the cutting device 1 is n (r / min), the moving speed of the cutting device 1 along the running direction of the lawn mower is v (m / s), and the number of the second cutting blades 131 is N2. According to the relationship between the above numerical values, it can be concluded that when the cutting device 1 rotates and moves along the cutting direction, the distance moved by the lawn mower (i.e., the length of the grass cut by the cutting device 1 along the moving direction) for each rotation of the cutting device 1 is When the auxiliary cutting assembly 13 has N2 second cutting blades 131, the length of grass that each second cutting blade 131 can cut, that is, the single cutting amount X0 (mm) of the second cutting blade 131 is:

[0176]

[0177] The second cutting blade 131 includes an exposed portion with a length L outside the coverage of the second cutter disc 12 (i.e., the distance between one end of the second cutting blade 131 extending out of the second cutter disc 12 and the outer edge of the second cutter disc 12). The ratio N of the length L of the exposed portion of the second cutting blade 131 to the single cutting amount is:

[0178]

[0179] The ratio N of the length L of the exposed portion of the second cutting blade 131 to the single cutting amount reflects the number of times the grass in the same area is cut by the same layer of cutting blades, and the length of the same area is equal to the single cutting amount of the cutting blade. The above ratio N is also called the number of repeated cuttings.

[0180] According to the above formula, the size of the ratio N is positively correlated with the length L of the exposed portion, the number N2 of the second cutting blades 131 and the rotation speed n of the second cutter disc 12 , and negatively correlated with the travel speed v of the cutting device 1 .

[0181] The ratio N reflects the number of times the grass in the same area is cut. The larger the ratio N, the more times the same layer of cutting blades passes through the same area, and the better the cutting effect. When the ratio N is too small, there is a risk that some grass cannot be cut, which reduces the cutting quality. Therefore, the ratio N is set to be greater than 1, that is, the length L is greater than or equal to the single cutting amount of the second cutting blade 131, which is more conducive to ensuring the cutting flatness of the lawn. Further, the ratio N can be set to be greater than or equal to 2.3. Further, the ratio N can be set to be greater than or equal to 3.4. Further, the ratio N can be set to be greater than or equal to 4.

[0182] In one embodiment, the phase difference of at least two cutting blades on the same cutting component on the cutter disc is within a preset angle. It should be noted that the preset angle can be any angle between 0 degrees and 10 degrees. For example, the angle is 0 degrees, 3 degrees, 5 degrees, 7 degrees, and 10 degrees. When the angle is 0 degrees, the multiple cutting blades on the same cutting component are in the same phase. When observing the cutting component from a top view, it can be seen that the multiple cutting blades are in the same straight line. It is understandable that when the cutter disc rotates, when multiple cutting blades on the same cutting component cannot contact the grass in the same area at the same time, it is difficult to achieve grass chopping or the grass chopping effect is poor. In this way, when the cutter disc rotates, multiple cutting blades on the same cutting component can contact grass of different heights almost at the same time, which can better achieve the grass chopping function.

[0183] The present disclosure also provides a cutting assembly, which can be applied to the lawn mower in any of the above embodiments.

[0184] Please refer to Figure 1-1 The cutting assembly is detachably mounted on the lawn mower, and the cutting assembly includes a blade connecting assembly and at least two cutting blades, wherein the at least two cutting blades are arranged on the blade connecting assembly and are detachably connected to the lawn mower through a connecting member of the blade connecting assembly. In this embodiment, the at least two cutting blades are arranged at different heights of the blade connecting assembly.

[0185] It should be noted that the connecting member 1120 can be set as the first limiting portion 1121 mentioned above, and the structure of the first limiting portion 1121 has been described in detail above and will not be repeated here. This embodiment does not specifically limit the blade connecting component 112 and the first limiting portion 1121, as well as the second limiting portion 101 and the third limiting portion 121 (as mentioned above) matched with the first limiting portion 1121, as long as the two ends of the blade connecting component 112 of the cutting component 11 are detachably mounted on the cutter disc (for example, the first cutter disc 10 and the second cutter disc 12 mentioned above) by means of snap connection, thread connection, penetration, etc.

[0186] The cutting assembly 11 provided in the present application includes at least two cutting blades 111 located in different cutting planes, which are detachably mounted on the lawn mower through a blade connecting assembly 112. When installing, first install multiple cutting blades on an independent blade connecting assembly. At this time, the blade connecting assembly is not installed on the output end 20 of the drive device. The output end 20 will not interfere with the installation of the cutting blades, which is easy for users to operate. After multiple cutting blades are installed on the blade connecting assembly, it is only necessary to operate and install the blade connecting assembly once to install the multi-layer blades on the output end 20, without installing each cutting blade piece by piece. When disassembling, first remove the blade connecting assembly from the output end 20 to avoid interference of the output end 20 with the removal of the cutting blades, and there is no need to disassemble them piece by piece. The cutting assembly 11 can be assembled and disassembled, which is very convenient. When the lawn mower needs to replace the cutting blade, you can choose to directly replace the entire cutting assembly 11, which is quick and convenient. When the cutting assembly 11 is detachably mounted on the lawn mower through the blade connecting assembly 112. Each cutting blade 111 of the cutting assembly 11 is located at a different height position of the blade connecting assembly 112, that is, each cutting blade 111 is located at a different height position of the lawn mower. The cutting assembly 11 has cutting blades 111 with different cutting planes, which can achieve a good grass chopping effect.

[0187] Please refer to Figure 1-2In other embodiments, at least two cutting blades 111 are arranged at the same height of the blade connection assembly 112, and are detachably connected to the output end of the driving device through the connecting piece on the blade connection assembly. The only difference from the above embodiment is that at least two cutting blades 111 are arranged at the same height of the blade connection assembly 112. It can be understood that multiple cutting blades 111 are connected to the same blade connection assembly 112, and then installed on the output end (or blade disc) through the blade connection assembly 112. When disassembling and assembling multiple cutting blades 111, it is only necessary to disassemble and assemble the entire blade connection assembly 112 from the output end. Disassembly and assembly only require one operation, which is more convenient for users. It should be noted that the cutting blade and the blade cutting assembly can be integrally formed, or can be detachably connected together in other ways, such as threaded connection, clamping, welding, etc.

[0188] This embodiment does not specifically limit the structure of the blade connection assembly 112. Figure 1-1 As shown, the blade connection assembly 112 includes a shaft body 1122 , and the cutting blade 111 includes a mounting hole, and the cutting blade 111 is sleeved on the shaft body 1122 through the mounting hole.

[0189] In one embodiment, at least two cutting blades are detachably connected to the blade connection assembly. A plurality of cutting blades can be integrally mounted and detached from the blade connection assembly, or a plurality of cutting blades can be separately mounted and detached from the blade connection assembly.

[0190] As an example, the blade connection assembly includes a shaft 1122, and the cutting blade is rotatably sleeved on the shaft 1122. A first mounting hole 1111 is provided on the cutting blade, and the cutting blade is sleeved on the shaft 1122 or removed from the shaft 1122 through the first mounting hole 1111. When the plurality of cutting blades are detachable relative to the blade connection assembly, the user can remove the cutting blade 111 from the blade connection assembly 112 and replace it with a new cutting blade. In this way, any cutting blade on the blade connection assembly 112 can be selectively replaced, for example, only the cutting blade with severe wear is replaced, while other cutting blades are retained, thereby saving costs.

[0191] In one embodiment, a clearance fit is provided between the cutting blade and the blade connecting assembly, and the cutting blade moves radially and / or axially along the blade connecting assembly. That is, the cutting blade can move left and right and / or up and down relative to the blade connecting assembly. That is to say, the cutting blade can move up and down and / or left and right relative to the shaft body 1122. As an example, the blade connecting assembly includes a shaft body 1122, and the cutting blade is rotatably sleeved on the shaft body 1122. A first mounting hole 1111 is provided on the cutting blade, and the cutting blade is sleeved on the shaft body 1122 through the first mounting hole 1111. The diameter of the first mounting hole 1111 is larger than the diameter of the shaft body 1122, so that there is a radial gap between the cutting blade and the shaft body 1122, thereby enabling the cutting blade to slide up and down on the shaft body 1122 and rotate left and right.

[0192] When the rotation speed of the cutting blade of a rotary blade cutting device (i.e., a cutting device in which the cutting blade cannot move relative to the blade disc or the output shaft) is high, the resistance borne by the output end of the driving device is large, so the energy consumption is large, and when the cutting blade accidentally collides with a hard obstacle, the cutting blade is easily damaged by the obstacle. If a human body or an animal accidentally collides with the cutting blade, the danger is also high. The cutting blade of the cutting assembly and its blade connecting assembly are set to a clearance fit. When the cutting assembly is applied to a lawn mower to perform mowing operations, the cutting blade can move left and right and up and down. During the cutting operation, the cutting blade rotates in a direction away from the center of rotation under the action of centrifugal force, and when the cutting blade hits an obstacle such as a stone or a branch, it can rotate freely to avoid damage, thereby reducing maintenance costs. In addition, this swinging blade cutting assembly has sharp blades, requires little power, and has low energy consumption.

[0193] In one embodiment, blade separation parts 114 are provided at different heights of the blade connection assembly, and the blade separation parts 114 are located between adjacent cutting blades so that at least two cutting blades are separated at different heights. The present application does not specifically limit the structure of the blade separation parts 114. Figure 1-1 As shown, the outer surface of the blade separation part 114 is cylindrical. The cylindrical outer surface can reduce the friction between the blade separation part 114 and the grass, thereby reducing the resistance of the lawn mower during travel, reducing the wear of the blade separation part 114, and extending the service life of the cutting assembly.

[0194] In order to facilitate the removal or installation of multiple cutting blades on the blade connection assembly from the shaft 1122, the blade separation portion 114 is also configured to be detachably connected to the blade connection assembly. As an example, the blade connection assembly includes the shaft 1122, the cutting blade is rotatably sleeved on the shaft 1122; and the blade separation portion 114 is sleeved on the shaft 1122. When the cutting blade needs to be removed from the blade connection assembly, the cutting blade and the blade separation portion 114 are removed from the shaft 1122 in sequence; similarly, when the cutting blade is installed in the blade connection assembly, the cutting blade and the blade separation portion 114 are sleeved on the shaft 1122 in sequence.

[0195] The cutting blade is provided with a first mounting hole 1111, and the cutting blade is sleeved on the shaft body 1122 through the first mounting hole 1111. The blade separation part 114 is provided with a second mounting hole 1141, and the blade separation part 114 is sleeved on the shaft body 1122 through the second mounting hole 1141. The inner diameters of the first mounting hole 1111 and the second mounting hole 1141 are larger than the outer diameter of the shaft body 1122. When the blade connection assembly 112 includes the shaft body 1122, the inner diameter of the first mounting hole 1111 of the cutting blade 111 is larger than the outer diameter of the shaft body 1122, so that the cutting blade 111 can move left and right and up and down on the shaft body 1122. In order to facilitate the disassembly and assembly of the multi-layer cutting blades, the blade separation part 114 is also arranged to be a structure that can be removed from the shaft body 1122. The inner diameter of the second mounting hole 1141 of the blade separation part 114 is larger than the outer diameter of the above-mentioned shaft body 1122, so that the blade separation part 114 can be freely inserted into or removed from the shaft body 1122, so as to facilitate the replacement of one or several multi-layer blades.

[0196] like Figure 1-1 As shown, the blade separation part 114 is a sleeve with a smooth outer surface, and the blade connection assembly 112 is a shaft body 1122, and the inner diameter of the sleeve is larger than the outer diameter of the shaft body 1122. The cutting blade 111 and the blade separation part 114 include mounting holes (i.e., a first mounting hole 1111 and a second mounting hole 1141), and the inner diameter of the mounting hole is also larger than the outer diameter of the shaft body 1122. The blade separation part 114 and the cutting blade 111 are sequentially spaced and sleeved on the shaft body 1122.

[0197] In one embodiment, part of the blade separation portion 114 and the cutting blade 111 can be a non-detachable whole. For example, a group of adjacent blade separation portions 114 and the cutting blade are a whole and cannot be detached. Multiple groups of blade separation portions 114 and cutting blades can be removed from or installed on the shaft 1122 respectively.

[0198] In another embodiment, all the cutting blades and the blade separation parts of the cutting assembly 11 can be a non-detachable whole, and the whole including all the cutting blades and the blade separation parts can be removed from or installed on the shaft body 1122.

[0199] Furthermore, the shaft body 1122 has an upper end and a lower end in the height direction of the lawn mower, at least two cutting blades are installed between the upper end and the lower end, at least one of the upper end and the lower end is detachably or fixedly connected with a stopper, and the size of the stopper along the radial direction of the shaft body 1122 is larger than the inner diameter of at least one of the first mounting hole 1111 and the second mounting hole 1141. In this way, when the cutting blade is disassembled from the shaft body, the cutting blade and the blade separation part 114 can be prevented from being separated from the shaft body 1122, avoiding difficulty in operation for the user.

[0200] It can be understood that in the height direction of the blade connection assembly 112, when the cutting blade is located at the bottom layer, the radial dimension of the stop portion along the shaft body 1122 is larger than the first mounting hole 1111, which can ensure that the cutting blade and the blade separation portion 114 do not fall off from the shaft body 1122. Similarly, when the cutting blade separation portion 114 is located at the bottom layer, the radial dimension of the stop portion along the shaft body 1122 is larger than the second mounting hole 1141, which can ensure that the cutting blade and the blade separation portion 114 do not fall off from the shaft body 1122. The radial dimension of the stop portion along the shaft body 1122 is larger than the first mounting hole 1111 and the second mounting hole 1141, which can also ensure that the cutting blade and the blade separation portion 114 do not fall off from the shaft body 1122.

[0201] Continue to see Figure 1-1 The blade connection assembly 112 is a shaft body 1122, and a stopper 113 is provided at one end or both ends (at least one of the upper end and the lower end) of the shaft body 1122. The stopper 113 is detachably or fixedly provided at the end of the shaft body 1122, and the cutting blade 111 is provided inside the end of the shaft body 1122. The size of the stopper 113 along the circumferential direction of the shaft body 1122 is larger than the inner diameter of the mounting hole of the cutting blade 111, so as to prevent the cutting blade from being separated from the end of the shaft body 1122.

[0202] As an example, the stopper 113 is detachably connected to the end of the shaft body 1122, and is connected to the shaft body 1122 by one of an interference connection (i.e., the outer diameter of the stopper is slightly larger than the inner diameter of the shaft body, and the stopper can be clamped with the shaft body when it is sleeved on the shaft body), a threaded connection, or a clamping connection. This detachable connection method is convenient for the user to disassemble and assemble the cutting blade on the shaft body 1122. When disassembling, applying an external force to the stopper 13 can release the matching relationship between the stopper and the shaft body 1122, and remove the stopper from the shaft body 1122, which makes it convenient for the user to remove the blade separation part and the cutting blade on the shaft body 1122. As for the end of the stopper 113 fixedly connected to the shaft body 1122, it can be welded, or the stopper and the shaft body 1122 can be integrally formed.

[0203] When the blade separation portion 114 and the cutting blade 111 are sequentially and spaced apart on the shaft body 1122, and the stop portion 113 is detachably mounted on the end of the shaft body 1122, or only one end of the two ends of the shaft body 1122 is connected with the stop portion 113, or the stop portions 113 are not arranged at both ends of the shaft body 1122, after the cutting assembly 11 is removed from the lawn mower, the cutting blade 111 and the blade separation portion 114 can be further detached from the shaft body 1122 of the cutting assembly 11. At this time, any cutting blade on the blade connection assembly 112 can be selectively replaced, for example, only the cutting blade with more severe wear can be replaced, while other cutting blades can be retained, thereby saving costs. When only one end of the shaft 1122 is connected with the stopper 113, or the two ends of the shaft 1122 are not provided with the stopper 113, at this time, since the cutting blade 111 and the blade separation part 114 only need to be sequentially and spacedly sleeved on the shaft 1122 as the blade connection component during installation, when disassembling, after the cutting component 11 is disassembled from the lawn mower, it is only necessary to gently move the cutting blade on the cutting component 11 that needs to be replaced along the shaft 1122 to remove the cutting blade from the end where the stopper 113 is not provided. At this time, although other cutting blades that do not need to be replaced and the corresponding blade separation part 114 located at the same end as the cutting blade may be removed together, the whole process does not require other additional complicated operations; after replacing the cutting blade, all the removed cutting blades and blade separation parts 114 are sleeved back on the shaft 1122. It is very convenient and quick to install, disassemble and replace the cutting blade. When both ends of the shaft body 1122 are connected with a stop portion 113, and the stop portion 113 at at least one end is removable, when the cutting blade needs to be replaced, in addition to choosing to replace the entire cutting assembly 11, you can still choose to remove the detachable stop portion 113 and then replace a single cutting blade according to the above process.

[0204] The present application does not specifically limit the structure of the stopper 113 , and the stopper 113 may be a sleeve sleeved on the end of the shaft body 1122 .

[0205] In one embodiment, the maximum distance that the cutting blade 111 moves up and down relative to the blade connecting assembly 112 is greater than zero and less than or equal to 1.6 mm. If the distance that the cutting blade 151 moves up and down relative to the blade connecting assembly 152 is too large, when the cutting assembly 11 is used to mow grass, grass clippings will fly into the gap between the cutting blade 111 and the blade connecting assembly 112, thereby causing the problem of the blade being stuck and affecting the normal operation of the cutting assembly 11. Therefore, it is necessary to control the distance that the cutting blade 111 can move up and down, and the above distance should be minimized while ensuring that the cutting blade 111 can rotate freely when encountering an obstacle. Experiments have shown that when the maximum distance that the cutting blade 111 moves up and down relative to the blade connecting assembly 112 is controlled within a range greater than 0 and less than 1.6 mm, the cutting assembly 11 can prevent obstacles from damaging the cutting blade 111 and will not cause the blade to be stuck. The above maximum distance can be controlled at 0.7 mm.

[0206] As an example, see Figure 1-1 The blade connection assembly 112 is a shaft 1122, and the cutting blade 111 includes a first mounting hole 1111. The cutting blade 111 is sleeved on the shaft 1122 through the first mounting hole 1111. The inner diameter of the first mounting hole 1111 is larger than the outer diameter of the shaft 1122. The cutting blade 111 can move left and right on the shaft 1122. Stops 113 are provided at both ends of the shaft 1122, and the cutting blade 111 is arranged within the length defined by the stoppers 113 at both ends of the shaft 1122. Figure 1-1 As shown, when the cutting assembly 11 is placed vertically in a natural state, the distance between the lower surface of the stop portion at the upper end of the cutting assembly 11 and the upper surface of the stop portion at the lower end of the cutting assembly 11 is defined as A1, and the distance between the cutting blade at the uppermost end of the cutting assembly 11 and the cutting blade at the lowermost end of the cutting assembly 11 is defined as A2. Then, the maximum distance that each cutting blade of the cutting assembly 11 moves up and down relative to the blade connecting assembly 112 is A0, and A0=A1-A2. 0<<A0<<1.6mm, optionally A0=0.7mm.

[0207] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0208] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

[0209] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0210] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0211] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0212] In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0213] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A lawn mower, characterized in that: include: case; A moving device, configured to be connected to the housing and drive the lawn mower to move; A driving device, disposed on the housing; A cutting device, connected to the driving device and configured to perform a cutting task under the driving of the driving device; The cutting device includes at least one cutting assembly, which includes a blade connecting assembly and at least two cutting blades. The at least two cutting blades are arranged on the blade connecting assembly, and the cutting assembly is detachably connected to the output end of the driving device through a connecting piece on the blade connecting assembly.

2. The lawn mower according to claim 1, characterized in that The cutting device comprises a cutter disc, the cutting assembly is mounted on the cutter disc, and the output end of the driving device is matched with the cutter disc to drive the cutting assembly to rotate for cutting; At least a portion of the blade connection assembly is detachably connected to the cutter disc, and the cutting assembly is detachably connected to the cutter disc via a connector on the blade connection assembly.

3. The lawn mower according to claim 2, characterized in that The at least two cutting blades are arranged at different height positions of the blade connection assembly, the blade connection assembly of the cutting assembly has an upper end and a lower end in the height direction of the lawn mower, the at least two cutting blades are installed between the upper end and the lower end, the cutter disc comprises a first cutter disc and a second cutter disc arranged below the first cutter disc, the upper end is connected to the first cutter disc, the lower end is connected to the second cutter disc, and of the first cutter disc and the second cutter disc, at least the second cutter disc is detachably connected to the output end; The upper end portion is detachably connected to the first cutter disc and / or the lower end portion is detachably connected to the second cutter disc.

4. The lawn mower according to claim 3, characterized in that The cutting device also includes an auxiliary cutting assembly arranged below the cutting assembly. The cutting assembly and the auxiliary cutting assembly are respectively detachably connected to the blade disc, and the auxiliary cutting assembly is connected below the second blade disc.

5. The lawn mower according to claim 2, characterized in that: The at least two cutting blades are detachably connected to the blade connecting assembly.

6. The lawn mower according to claim 5, characterized in that The blade connection assembly comprises a shaft body, and the cutting blade is rotatably sleeved on the shaft body.

7. The lawn mower according to claim 6, characterized in that The blade connection assembly is provided with blade separation parts at different heights, and the blade separation parts are located between adjacent cutting blades so that the at least two cutting blades are separated at different heights; the blade separation parts are sleeved on the shaft body.

8. The lawn mower according to claim 7, characterized in that The cutting blade is provided with a first mounting hole, and the cutting blade is mounted on the shaft body through the first mounting hole. The blade separation part is provided with a second mounting hole, and the blade separation part is mounted on the shaft body through the second mounting hole. The inner diameters of the first mounting hole and the second mounting hole are larger than the outer diameter of the shaft body.

9. The lawn mower according to claim 8, characterized in that The shaft body has an upper end and a lower end in the height direction of the lawn mower, and the at least two cutting blades are installed between the upper end and the lower end. At least one of the upper end and the lower end is detachably or fixedly connected with a stop portion, and the size of the stop portion along the radial direction of the shaft body is larger than the inner diameter of at least one of the first mounting hole and the second mounting hole.

10. A cutting assembly, characterized in that: The cutting assembly comprises a blade connecting assembly and at least two cutting blades, wherein the at least two cutting blades are arranged on the blade connecting assembly, and the cutting assembly is detachably connected to the lawn mower via a connecting piece of the blade connecting assembly.

11. The cutting assembly according to claim 10, characterized in that The at least two cutting blades are detachably connected to the blade connecting assembly.

12. The cutting assembly according to claim 11, characterized in that The blade connection assembly comprises a shaft body, and the cutting blade is rotatably sleeved on the shaft body.

13. The cutting assembly according to claim 12, characterized in that The at least two cutting blades are arranged at different heights of the blade connecting assembly, and blade separation parts are arranged at different heights of the blade connecting assembly. The blade separation parts are located between adjacent cutting blades so that the at least two cutting blades are separated at different heights.

14. The cutting assembly according to claim 13, characterized in that The cutting blade is provided with a first mounting hole, and the cutting blade is mounted on the shaft body through the first mounting hole. The blade separation part is provided with a second mounting hole, and the blade separation part is mounted on the shaft body through the second mounting hole. The inner diameters of the first mounting hole and the second mounting hole are larger than the outer diameter of the shaft body.

15. The cutting assembly according to claim 14, characterized in that The shaft body has an upper end and a lower end in the height direction of the cutting assembly, and the at least two cutting blades are installed between the upper end and the lower end. At least one of the upper end and the lower end is detachably or fixedly connected with a stop portion, and the radial size of the stop portion along the shaft body is larger than the inner diameter of at least one of the first mounting hole and the second mounting hole.

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