Grass raking accessory

Abstract

The utility model discloses a grass raking accessory. The raking accessory comprises a first combination part used for being combined to a main body of the multi-head tool; a tool holder shaft; the cutting assembly is installed on the knife rest shaft, and at least part of the cutting assembly is configured to rotate synchronously with the knife rest shaft; the cutting assembly may be configured as a first cutting assembly or a second cutting assembly, at least a portion of the cutting elements of the first cutting assembly and the second cutting assembly being different. According to the grass raking accessory, the cutting elements with different functions can be replaced, so that different functions are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to a grass raking accessory. Background Art

[0002] Multi-head tools are a popular type of electric tools in the market. Generally, the main body of a multi-head tool includes a power device, which can be used with a variety of accessories, such as pruning accessories, raking accessories, and tillage accessories. However, in the prior art, the raking accessories installed on the multi-head tool have a single function when raking, which is difficult to meet the needs of users.

[0003] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a raking attachment, which can replace cutting elements with different functions to achieve different functions.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A grass raking attachment, comprising:

[0007] A first coupling portion, used to couple to a main body of the multi-head tool;

[0008] Tool holder shaft;

[0009] a cutting assembly mounted to the tool holder shaft, at least a portion of the cutting assembly being configured to rotate synchronously with the tool holder shaft;

[0010] The cutting assembly may be configured as a first cutting assembly or a second cutting assembly, and at least a portion of the cutting elements of the first cutting assembly and the second cutting assembly are different.

[0011] In some embodiments, the first cutting assembly and the second cutting assembly both include a detachable locking member, and the first cutting assembly or the second cutting assembly can be detached from the tool holder shaft when the locking member is removed.

[0012] In some embodiments, the cutting element of the first cutting assembly is a roller blade, and the roller blade is sleeved on the blade holder shaft.

[0013] In some embodiments, the cutting element of the second cutting assembly is a torsion spring assembly, and the torsion spring assembly is sleeved on the tool holder shaft.

[0014] In some embodiments, the torsion spring assembly includes a torsion spring seat and a torsion spring, the torsion spring seat is sleeved on the tool holder shaft, and the torsion spring is detachably connected to the torsion spring seat.

[0015] In some embodiments, the mowing attachment further comprises wheels and the multi-tool is a push-type multi-tool.

[0016] In some embodiments, the mowing attachment further comprises a height adjustment mechanism configured to adjust the height of the blade carriage shaft relative to the ground.

[0017] In some embodiments, the raking attachment further includes a height adjustment mechanism, and the height adjustment mechanism includes:

[0018] A gear member, fixedly connected to the housing of the grass raking attachment and provided with a plurality of gears, wherein the relative positions of the housing and the blade holder shaft are fixed;

[0019] A connecting rod, one end of which is connected to the wheel and the other end of which is pivotally connected to the housing;

[0020] A handle is fixedly connected to the connecting rod, and the handle can be selected to cooperate with any of the gear positions so that the connecting rod and the wheel can be rotated relative to the housing and the tool holder shaft and then locked.

[0021] In some embodiments, the raking attachment further comprises a protective cover.

[0022] In some embodiments, the protective cover is a flip grass removal baffle.

[0023] The benefits of this application are:

[0024] The mowing attachment of the present application is configured with a first cutting component and a second cutting component that can be installed on the blade holder shaft, and the cutting element of the first cutting component is different from the cutting element of the second cutting component. The user can choose to switch different cutting components to meet different mowing needs, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a multi-head tool provided in a specific embodiment of the present application;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the multi-head tool in another perspective;

[0027] Figure 3 It is a partial structural schematic diagram of a raking attachment equipped with a torsion spring assembly provided in a specific embodiment of the present application;

[0028] Figure 4 yes Figure 3A front view of the raking attachment in FIG.

[0029] Figure 5 is an axonometric view of a raking attachment provided in a specific embodiment of the present application;

[0030] Figure 6 yes Figure 5 Side view of the mid-raking attachment;

[0031] Figure 7 is a structural schematic diagram of a first pulley provided in a specific embodiment of the present application;

[0032] Figure 8 is a schematic structural diagram of a second pulley provided in a specific embodiment of the present application;

[0033] Fig. 9 It is a partial structural schematic diagram of a grass raking attachment equipped with a roller blade provided in a specific embodiment of the present application;

[0034] Fig.10 yes Fig. 9 A front view of the raking attachment in FIG.

[0035] Fig.11 It is a structural schematic diagram of a torsion spring assembly provided in a specific embodiment of the present application;

[0036] Fig.12 It is a structural schematic diagram of a torsion spring provided in a specific embodiment of the present application;

[0037] Fig.13 yes Figure 1 A in the enlarged view;

[0038] Fig.14 It is a schematic structural diagram of a blade holder shaft of a grass raking attachment provided in a specific embodiment of the present application at one height;

[0039] Fig.15 It is a schematic diagram of the result of the blade holder shaft of the mowing attachment provided in the specific embodiment of the present application at another height.

[0040] In the figure:

[0041] 100, raking attachment; 10, first joint; 11, support rod; 12, main transmission shaft; 20, knife holder shaft; 30, cutting assembly; 31, drum blade; 32, torsion spring assembly; 321, torsion spring seat; 3211, matching hole; 3212, seat body; 3213, connecting part; 32131, mounting hole; 32132, slot; 32133, jack; 32134, connecting groove; 322, torsion spring; 3221, free end; 3222, spring body; 3223, limiting part; 33, locking member; 331, arc clamp; 332, fastener; 40, transmission device; 41, first pulley; 411, first inner ring; 412, first Outer ring; 413, first blade structure; 42, second pulley; 421, second inner ring; 422, second outer ring; 423, second blade structure; 43, belt; 50, wheel; 51, connecting rod; 60, housing; 61, first cavity; 62, second cavity; 63, protective cover; 64, partition; 70, height adjustment mechanism; 71, gear member; 711, gear; 72, connecting rod; 73, handle; 731, bayonet; 81, gear box; 82, secondary transmission shaft; 90, tensioning mechanism; 91, elastic member; 92, tensioning assembly; 921, connecting member; 922, pressing wheel; 923, first end; 924, second end; 925, third end;

[0042] 200, main body; 201, power supply device; 202, first gripping part; 203, operation switch; 204, motor; 205, second gripping part; 206, second combining part. DETAILED DESCRIPTION

[0043] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0044] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0045] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0046] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0047] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0048] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0049] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0050] The present application provides a garden tool, which may be a lawn mower or a multi-head tool. The following embodiments are described by taking the garden tool as a hand-push multi-head tool as an example.

[0051] The multi-head tool includes a main body 200 and a plurality of different working heads. Different working heads can be selectively installed on the main body 200, so that the multi-head tool can respectively realize different functions. The main body 200 is for the user to hold and push the working head to move relative to the ground. Optionally, the working head can be a grass raking attachment 100, a snow shoveling attachment, a pruning attachment, etc. In this embodiment, the working head is taken as an example of a grass raking attachment 100 for description.

[0052] like Figure 1 and Figure 2 As shown, the main body 200 of the multi-head tool includes a power supply device 201, a first grip portion 202, an operating switch 203 and a motor 204. The power supply device 201 is used to supply power to the motor 204. In some embodiments, the voltage provided by the power supply device 201 can be up to 56V, and the maximum speed of the motor 204 can reach 3500r / min. The first grip portion 202 is used for the user to hold, and the operating switch 203 is used for the user to operate. In some embodiments, the operating switch 203 is arranged on the first grip portion 202 or at a position close to the first grip portion 202, so that the user can hold and operate with one hand. In some embodiments, the main body 200 also includes a second grip portion 205. The first grip portion 202 and the second grip portion 205 can be held by the user's hands respectively, so as to ensure the stability of multiple tools when working.

[0053] In some embodiments, the power supply device 201, the first grip portion 202, the motor 204 and the second grip portion 205 are sequentially arranged and arranged roughly along a straight line. The power supply device 201 is arranged at the end away from the working head. On the one hand, it is convenient to disassemble and replace. On the other hand, the mowing attachment 100 will generate a force on the main body 200 when working. The heavy power supply device 201 is located at the end away from the mowing attachment 100. It can balance this force, avoid a large vibration when the user holds it, and improve the user experience. It should be noted that the main body 200 also includes a rod, which can support and connect the power supply device 201, the first grip portion 202, the operating switch 203, the motor 204, etc.

[0054] like Figure 1 and Figure 2As shown, the raking attachment 100 includes a first coupling portion 10, and the main body 200 also includes a second coupling portion 206, and the first coupling portion 10 is used to be combined with the second coupling portion 206. It can be understood that the combination of the raking attachment 100 and the main body 200 includes but is not limited to mechanical structure connection, power transmission and electrical connection. Among them, the mechanical structure connection includes the connection of the supporting components, the power transmission refers to the transmission connection between the output shaft of the motor 204 and the transmission structure of the raking attachment 100, and the electrical connection includes the electrical connection between the detection element, the lighting lamp, etc. on the raking attachment 100 and the operating switch 203 and the power supply device 201 respectively. In this embodiment, as Figure 3 As shown, the first combination part 10 includes a support rod 11 and a main transmission shaft 12. The support rod 11 is a tubular component. The main transmission shaft 12 is inserted into the support rod 11. The main transmission shaft 12 can rotate relative to the support rod 11 around its own axis. When the first combination part 10 is combined with the second combination part 206, the support rod 11 is connected to the shell structure of the main body 200, and the main transmission shaft 12 is directly or indirectly connected to the output end of the motor 204. In this embodiment, one end of the main transmission shaft 12 close to the main body 200 extends to the outside of the support rod 11, so as to facilitate the connection with the output end of the motor 204.

[0055] In some embodiments (not shown), the main body 200 of the multi-head tool is not provided with the motor 204, and the motor 204 is provided on the working head. This multi-head tool is convenient for configuring the motor 204 with corresponding performance according to the actual working requirements of the working head. In this embodiment, the connection between the first connecting portion 10 and the second connecting portion 206 does not include power transmission.

[0056] like Figure 1 and Figure 2 As shown, the grass raking attachment 100 also includes a support structure, a tool holder shaft 20, a cutting assembly 30 and a transmission device 40. The support structure is connected to the first joint portion 10, and the support structure is used to support various components of the grass raking attachment 100. The tool holder shaft 20 is rotatably mounted on the support structure, and the cutting assembly 30 is mounted on the tool holder shaft 20, and the cutting assembly 30 rotates synchronously with the tool holder shaft 20. The transmission device 40 is also mounted on the support structure, and the input end of the transmission device 40 is directly or indirectly coupled to the first joint portion 10, and the output end of the transmission device 40 is coupled to the tool holder shaft 20. Under the action of the motor 204, the first joint portion 10 drives the transmission device 40 to move, the transmission device 40 drives the tool holder shaft 20 to rotate, and the tool holder shaft 20 drives the cutting assembly 30 to rotate, thereby operating the ground. In this embodiment, the tool holder shaft 20 extends laterally. Specifically, the lateral extension means that when the grass raking attachment 100 is working, the tool holder shaft 20 is roughly parallel to the ground.

[0057] In the present embodiment, the raking attachment 100 further includes a wheel 50, which is connected to the supporting mechanism. When the user pushes the raking attachment 100 to work through the main body 200, the wheel 50 can reduce the resistance of the raking attachment 100 to move forward, thereby saving effort and improving the user experience. In some embodiments, the raking attachment 100 can also be additionally configured with a drive source for the wheel 50, and the power of the drive source replaces the manual drive wheel 50 rotation, thereby further improving the user experience. In this embodiment, the drive source can be electrically connected to the power supply device 201 of the main body 200 through the combination of the first combining portion 10 and the second combining portion 206.

[0058] like Figure 1 and Figure 2 As shown, the support structure includes a shell 60, and the shell 60 can cover and protect the tool holder shaft 20, the transmission device 40 and at least part of the cutting assembly 30. In this embodiment, the first coupling portion 10 is connected to the shell 60. The connection position between the first coupling portion 10 and the shell 60 is located in the middle of the raking attachment 100 along the width direction, so that the raking attachment 100 is more balanced in force. The wheel 50 is connected to the shell 60, and two wheels 50 are provided and are respectively connected to the two ends of the shell 60 along the width direction. In other embodiments, three, four or more wheels 50 can also be provided, which is not specifically limited here.

[0059] In this embodiment, the housing 60 covers the upper area of ​​the cutting assembly 30, so as to prevent the user from being accidentally injured by the cutting assembly 30 or the raised stones. The lowest point of the housing 60 is at a certain distance from the ground. On the one hand, the housing 60 does not contact the ground, which can avoid wear; on the other hand, the housing 60 can block obstacles such as large stones to prevent these obstacles from causing accidental damage to the cutting assembly 30.

[0060] like Figure 1 and Figure 3 As shown, the grass raking attachment 100 also includes a protective cover 63, which is arranged on the side of the grass raking attachment 100 facing the user, and the protective cover 63 can prevent the cutting assembly 30 from causing damage to the user. In this embodiment, the protective cover 63 is a flip grass discharge baffle. Specifically, the protective cover 63 is pivotally connected to the shell 60. When the grass raking attachment 100 is working, the grass cut by the cutting assembly 30 moves backward and pushes the protective cover 63 to flip to the rear side, thereby achieving the discharge of grass, preventing weeds from being entangled with the cutting assembly 30 and causing the cutting assembly 30 to fail to work. In some embodiments, the end of the protective cover 63 close to the ground is made of flexible material, and the flexible part can buffer and block granular objects such as stones, prevent stones from splashing and injuring users, and improve the safety of the grass raking attachment 100. The flexible material can be a rubber pad, a plastic with strong elastic deformation ability, etc.

[0061] In some embodiments, such as Figure 3 As shown, the transmission device 40 is arranged at one end of the tool holder shaft 20. By arranging the transmission device 40 at one end of the tool holder shaft 20, it is possible to prevent the cutting assembly 30 mounted on the tool holder shaft 20 from being interrupted by the transmission device 40 along the axial direction of the tool holder shaft 20, thereby preventing the raking attachment 100 from leaking grass along the axial direction of the tool holder shaft 20 during operation, thereby improving the raking effect of the raking attachment.

[0062] In some embodiments, such as Figure 4 As shown, the cutting assembly 30 includes a plurality of cutting elements, which are sequentially mounted on the tool holder shaft 20, and the maximum distance between two adjacent cutting elements is less than or equal to 4 cm. This setting can also avoid the problem of grass leakage along the axial direction of the tool holder shaft 20 when the raking attachment 100 is working, thereby improving the user experience. Optionally, the distance between two adjacent cutting elements can be 0, 1 cm, 2 cm, 3 cm, 4 cm, etc., which is not specifically limited here.

[0063] like Figure 3 and Figure 4 As shown, the mowing attachment 100 also includes a gearbox 81 and a secondary transmission shaft 82. The input end of the gearbox 81 is directly or indirectly coupled to the main transmission shaft 12, and the output end of the gearbox 81 is directly or indirectly coupled to one end of the secondary transmission shaft 82. The other end of the secondary transmission shaft 82 is connected to the input end of the transmission device 40. In this embodiment, the secondary transmission shaft 82 is roughly parallel to the tool holder shaft 20. On the one hand, the setting of the gearbox 81 can reduce the rotational motion output by the motor 204 once, ensuring that the tool holder shaft 20 rotates at a more appropriate speed. On the other hand, the rotational motion can be transmitted to the end of the tool holder shaft 20 through the secondary transmission shaft 82, thereby realizing the design of arranging the transmission device 40 at one end of the tool holder shaft 20. In this embodiment, the gearbox 81 is installed on the support structure of the mower, and the secondary transmission shaft 82 is rotatably installed on the support structure.

[0064] like Figure 4 and Figure 5 As shown, the support structure further includes a partition 64, which is disposed inside the housing 60 and enables the raking attachment 100 to form a first cavity 61 and a second cavity 62. The transmission device 40 is at least partially disposed in the first cavity 61, and the gear box 81 and the secondary transmission shaft 82 are disposed in the second cavity 62. By arranging the transmission device 40 in an independent cavity, it is possible to prevent grass clippings or other objects generated by raking from being drawn into the transmission device 40 and causing the transmission device 40 to be unable to operate.

[0065] In this embodiment, the transmission device 40 is a belt drive, which has good flexibility, can mitigate impact and absorb vibration, thereby alleviating the vibration transmitted to the main body 200 when the mowing attachment 100 is working, and improving the user experience. Figure 5 and Figure 6 As shown, the transmission device 40 includes a first pulley 41, a second pulley 42 and a belt 43, the first pulley 41 is directly or indirectly coupled to the output shaft of the motor 204, the second pulley 42 is coupled to the tool holder shaft 20, and the belt 43 is sleeved on the first pulley 41 and the second pulley 42. In this embodiment, the first pulley 41 and the second pulley 42 are both rotatably mounted on the partition 64, the first pulley 41 is connected to the secondary transmission shaft 82 and rotates synchronously, and the second pulley 42 is connected to the tool holder shaft 20 and rotates synchronously.

[0066] Alternatively, if Figure 7 and Figure 8 As shown, the first pulley 41 and the second pulley 42 are both wedge pulleys, and the belt 43 is a wedge belt. The cooperation of the wedge belt and the wedge pulley can not only transmit a large power, but also has small vibration and stable operation. In other embodiments, the first pulley 41 and the second pulley 42 can both be ordinary pulleys, and the belt 43 can be an ordinary belt 43.

[0067] The belt 43 may become loose after long-term use, which may lead to transmission failure and the problem that the cutting assembly 30 cannot work normally. Figure 5 and Figure 6 As shown, the garden tool further includes a tensioning mechanism 90, which is configured to keep the belt 43 always tensioned, thereby preventing transmission failure from occurring.

[0068] In this embodiment, the tensioning mechanism 90 includes an elastic member 91 and a tensioning assembly 92, wherein one end of the elastic member 91 is connected to the support structure, that is, fixedly installed relative to the working assembly (the tool holder shaft 20 and the cutting assembly 30). The tensioning assembly 92 includes three connecting ends, namely a first end 923, a second end 924 and a third end 925. The first end 923, the second end 924 and the third end 925 are not colinear. The first end 923 is pivotally connected to the support structure, the second end 924 is connected to the other end of the elastic member 91, and the third end 925 presses against the belt 43, and the elastic member 91 is always in an elastically deformed state to tension the belt 43. Specifically, because the tensioning assembly 92 presses against the belt 43, the elastic member 91 maintains a certain amount of deformation. After the belt 43 becomes loose due to long-term use, its restraining force on the elastic member 91 is reduced, and the elastic member 91 releases a certain amount of deformation (i.e., the deformation is reduced), so that the tensioning assembly 92 as a whole rotates around its first end 923, and the second end 924 of the tensioning assembly 92 further presses the belt 43 during the rotation around the first end 923, so that the belt 43 remains tensioned. In this embodiment, the first end 923 of the tensioning assembly 92 is pivotally connected to the partition 64, and one end of the elastic member 91 is fixedly connected to the partition 64. The connection structure between the elastic member 91 and the partition 64 can be flexibly set as needed, and is not limited here.

[0069] In some embodiments, the tensioning assembly 92 includes a connecting member 921 and a pressing wheel 922, wherein the connecting member 921 is pivotally connected to the partition 64, and the pivoting position constitutes the first end 923 of the tensioning assembly 92. The elastic member 91 is connected to the connecting member 921, and the connecting position constitutes the second end 924 of the tensioning assembly 92. The pressing wheel 922 is connected to the connecting member 921 and can rotate relative to the connecting member 921, and the pressing wheel 922 constitutes the third end 925 of the tensioning assembly 92. The pressing wheel 922 presses the belt 43, so that the cooperation between the tensioning assembly 92 and the belt 43 is a rolling cooperation, thereby reducing the wear of the belt 43 and improving the service life of the transmission device 40. In this embodiment, the tensioning assembly 92 is arranged on the outside of the belt 43 to ensure that the belt 43 has a sufficiently large wrap angle with the first pulley 41 and the second pulley 42, respectively, thereby ensuring the reliability of the transmission. In other embodiments, the tensioning assembly 92 can also be arranged on the inside of the belt 43. In other embodiments, the raking attachment 100 may be provided with two, three or more tensioning mechanisms 90 .

[0070] In some embodiments, the transmission device 40 may also be a gear transmission or a chain transmission. For the gear transmission, the transmission device 40 includes a first gear directly or indirectly coupled to the output shaft of the motor 204, a second gear directly or indirectly coupled to the tool holder shaft 20, and the first gear is directly or indirectly meshed with the second gear. For the chain transmission, the transmission device 40 includes a first sprocket directly or indirectly coupled to the output shaft of the motor 204, a second sprocket directly or indirectly coupled to the tool holder shaft 20, and a chain respectively coupled to the first sprocket and the second sprocket. It should be noted that the first pulley, the second pulley, the first gear, the second gear, the first sprocket, and the second sprocket can all be collectively referred to as transmission wheels.

[0071] When the garden tool is running for a long time, the transmission device 40 will generate heat. If the heat cannot be dissipated in time, the life of the garden tool may be shortened or even damaged due to overheating. In the prior art, a heat dissipation system is usually configured for the garden tool, which not only increases the manufacturing cost, but also increases the size of the garden tool, reducing the user experience.

[0072] In this regard, Figure 5 and Figure 6 As shown, the transmission wheel of the transmission device 40 includes a fan blade structure, which can drive air flow when the transmission wheel rotates. When the transmission wheel of the transmission device 40 rotates, the airflow driven by the synchronous rotation of the fan blade structure can dissipate heat for the transmission device 40 or other structures of the mowing attachment 100, which can prevent the transmission device 40 from being damaged due to overheating, and does not require additional parts, which not only reduces the manufacturing cost, but also keeps the size of the garden tool smaller. Optionally, each transmission wheel includes an inner ring and an outer ring, and the fan blade structure is evenly distributed between the inner ring and the outer ring, thereby forming an axial flow fan.

[0073] In this embodiment, Figure 7 As shown, the first pulley 41 includes a first outer ring 412, a first inner ring 411 and a plurality of first blade structures 413, and the plurality of first blade structures 413 are evenly distributed between the first outer ring 412 and the first inner ring 411. The first inner ring 411 is connected to the tool holder shaft 20, and the first outer ring 412 cooperates with the belt 43. When the belt 43 drives the first pulley 41 to rotate, the first blade structure 413 can drive the air in the first cavity 61 to flow and form a first air path. The first air path can dissipate heat by the transmission device 40 and other structures arranged in the first cavity 61. It should be noted that the first cavity 61 is not a sealed cavity, that is, the first cavity 61 is connected to the outside of the raking attachment 100, so as to ensure that the hot air in the first cavity 61 can circulate with the normal temperature air outside the raking attachment 100, thereby better dissipating heat for the structure in the first cavity 61. The way to connect the first cavity 61 to the outside can be to set an opening on the shell 60, or it can only rely on the gap of the shell 60 itself.

[0074] like Figure 8 As shown, the second pulley 42 includes a second outer ring 422, a second inner ring 421 and a plurality of second blade structures 423, and the plurality of second blade structures 423 are evenly distributed between the second outer ring 422 and the second inner ring 421. When the second pulley 42 rotates, the second blade structure 423 drives the air flow. In this embodiment, the second blade structure 423 opens the first cavity 61 and the second cavity 62 through the second blade structure 423. When the second pulley 42 rotates, it can drive the air flow to flow between the first cavity 61 and the second cavity 62. The air flow flowing in the second cavity 62 can cool down the auxiliary transmission shaft 82, the gear box 81 and other structures to avoid damage to the gear box 81 and the auxiliary transmission shaft 82 due to overheating. An opening is provided on the partition 64, which is opposite to the second blade structure 423, so that the first cavity 61 and the second cavity 62 are connected. Optionally, the second cavity 62 may also be arranged to be in communication with the outside of the mowing attachment 100, so as to facilitate the circulation of the hot air in the first cavity 61 and the second cavity 62 with the external normal temperature air, thereby improving the cooling effect.

[0075] In the prior art, the raking attachment 100 used to be installed on a multi-head tool has a single function when raking, which is difficult to meet the user's use needs. In this regard, in this embodiment, the cutting assembly 30 of the raking attachment 100 can be configured as a first cutting assembly or a second cutting assembly, and the cutting elements of the first cutting assembly and the second cutting assembly are different. The user can choose to switch different cutting assemblies 30, so that the raking attachment 100 can meet different raking needs, thereby improving the user experience.

[0076] In some embodiments, Fig. 9and Fig.10 As shown, the cutting element of the first cutting assembly is a roller blade 31, and the roller blade 31 is sleeved on the blade holder shaft 20. The roller blade 31 can be used to loosen the soil. In this embodiment, the raking attachment 100 includes a plurality of roller blades 31, and the plurality of roller blades 31 are sequentially arranged along the axial direction of the blade holder shaft 20.

[0077] In this embodiment, the portion of the tool holder shaft 20 for the roller blade 31 to be sleeved is defined as a sleeve portion, the cross section of the sleeve portion is non-circular, and the shape of the hole of the roller blade 31 for sleeved on the tool holder shaft 20 is the same as the shape and size of the sleeve portion. The non-circular matching method realizes the circumferential limitation between the tool holder shaft 20 and the roller blade 31, thereby ensuring that the roller blade 31 can rotate synchronously with the tool holder shaft 20. Optionally, the cross section of the tool holder shaft 20 in the sleeve portion can be hexagonal. In other embodiments, the cross section of the tool holder shaft 20 in the sleeve portion can also be a quadrilateral, an octagon, etc., which is not specifically limited here.

[0078] like Fig.10 As shown, the support structure also includes a detachable locking member 33. When the locking member 33 is removed, the first cutting assembly can be removed from the tool holder shaft 20. In this embodiment, the roller blade 31 located at one end of the tool holder shaft 20 can be axially limited by an annular boss or other structure located on the tool holder shaft 20, and the roller blade 31 located at the other end of the tool holder shaft 20 is axially limited by the locking member 33. When the locking member 33 is removed, all the roller blades 31 can be removed from the end of the tool holder shaft 20 where the locking member 33 is set. In this embodiment, the locking member 33 includes an arc-shaped clamp 331 and a fastener 332. The support structure (such as the housing 60) of the grass raking attachment 100 is provided with an arc-shaped groove. The arc-shaped groove and the arc-shaped clamp 331 are surrounded to form a cylindrical matching position. The end of the tool holder shaft 20 is set in the cylindrical matching position and can rotate in the cylindrical matching position, so that the support of the end of the tool holder shaft 20 and the axial limitation of the roller blade 31 can be achieved. Optionally, the fastener 332 can be a bolt, which has a simple structure and is easy to disassemble and assemble. In some embodiments, the arc clamp 331 and the arc groove are both semicircular arcs. In some embodiments, one of the arc clamp 331 and the arc groove is a superior arc and the other is an inferior arc, and the sum of the central angles of the two is not greater than 180°. In some embodiments, a bearing is also sleeved on the tool holder shaft 20, and the bearing is clamped in the cylindrical matching position formed by the arc clamp 331 and the arc groove. The setting of the bearing can ensure the smooth rotation of the tool holder shaft 20.

[0079] In some embodiments, such as Figure 3 and Figure 4As shown, the cutting element of the second cutting assembly is a torsion spring assembly 32, which is sleeved on the blade holder shaft 20 and is used for raking grass. In this embodiment, the raking grass attachment 100 includes a plurality of torsion spring assemblies 32, which are sequentially arranged along the axial direction of the blade holder shaft 20.

[0080] In this embodiment, the portion of the tool holder shaft 20 for the torsion spring assembly 32 to be sleeved is defined as a sleeve portion, and the cross section of the sleeve portion is non-circular, such as Fig.11 As shown, the shape of the matching hole 3211 of the torsion spring assembly 32 used to sleeve the tool holder shaft 20 is the same as the shape and size of the sleeve portion. The circumferential limit between the tool holder shaft 20 and the torsion spring assembly 32 is achieved by a non-circular matching method, thereby ensuring that the torsion spring assembly 32 can rotate synchronously with the tool holder shaft 20. Optionally, the cross-section of the sleeve portion of the tool holder shaft 20 and the shape of the matching hole 3211 are both hexagonal. In other embodiments, the cross-section of the tool holder shaft 20 at the sleeve portion, that is, the shape of the matching hole 3211, can also be set to a quadrilateral, octagon, etc., which is not specifically limited here.

[0081] like Figure 4 As shown, in this embodiment, the torsion spring assembly 32 located at one end of the tool holder shaft 20 can be axially limited by an annular boss or other structure located on the tool holder shaft 20, and the torsion spring assembly 32 located at the other end of the tool holder shaft 20 is axially limited by a locking member 33. When the locking member 33 is removed, all the torsion spring assemblies 32 can be removed from the end of the tool holder shaft 20 where the locking member 33 is set. It should be noted that only some of the cutting elements may be different between different cutting assemblies. For example, the third cutting assembly is composed of a roller blade 31 and a torsion spring assembly 32 to form a mix. In addition, when the cutting elements are different, it may also lead to different numbers of cutting elements required for the cutting assembly, or different spacings between the cutting elements, or different installation methods of the cutting elements.

[0082] like Fig.11 and Fig.12 As shown, the torsion spring assembly 32 includes a torsion spring seat 321 and a torsion spring 322. The torsion spring seat 321 is sleeved on the tool holder shaft 20, and the torsion spring 322 is detachably connected to the torsion spring seat 321. Therefore, when an individual torsion spring 322 is damaged, it is not necessary to disassemble the entire torsion spring assembly 32, and only the corresponding torsion spring 322 can be replaced, which improves the convenience of replacing parts of the raking attachment 100.

[0083] In this embodiment, the torsion spring seat 321 includes a seat body 3212 and a connecting portion 3213. The seat body 3212 is provided with a matching hole 3211 and is used to be sleeved on the tool holder shaft 20. The connecting portion 3213 is provided on the circumferential surface of the seat body 3212, and the torsion spring 322 is detachably mounted on the connecting portion 3213. In this embodiment, the torsion spring seat 321 includes two connecting portions 3213. In other embodiments, the number of connecting portions 3213 may also be one, three or more, and each connecting portion 3213 is connected to a torsion spring 322.

[0084] like Fig.12 As shown, the torsion spring 322 includes a spring body 3222 and two free ends 3221, the two free ends 3221 are used for raking grass, and a limiting portion 3223 is radially protruded outward on the spring body 3222. Fig.11 As shown, a mounting hole 32131 is provided on the end surface of the connecting portion 3213, and the mounting hole 32131 is used for inserting the corpus luteum. A slot 32132 is provided on the hole wall of the mounting hole 32131, and the slot 32132 is provided along the radial direction of the mounting hole 32131, and penetrates the end surface of the connecting portion 3213 along the axial direction of the mounting hole 32131, and the slot 32132 is used for inserting the limiting portion 3223. A plurality of plug holes 32133 are provided on the hole wall of the mounting hole 32131, and the plug holes 32133 are used for the free end 3221 to pass through, and the number of the plug holes 32133 is the same as the number of the free end 3221. A connecting groove 32134 is also provided on the hole wall of the mounting hole 32131, and the connecting groove 32134 starts from the end surface of the connecting portion 3213 and extends along the axial direction of the mounting hole 32131, and the connecting groove 32134 connects a plurality of plug holes 32133.

[0085] When installing the torsion spring 322, the free end 3221 and the limiting portion 3223 can be pressed to make the two move closer (or farther) along the circumferential direction of the spring body 3222. At this time, the spring body 3222 is opposite to the mounting hole 32131, the limiting portion 3223 is opposite to the slot 32132, and the free end 3221 is opposite to the connecting groove 32134. Then, the torsion spring 322 is installed into the mounting hole 32131 along the axial direction of the mounting hole 32131. When the free end 3221 is opposite to the corresponding insertion hole 32133, the free end 3221 and the limiting portion 3223 are no longer pressed. The two are reset under the elasticity of the spring body 3222, and the free end 3221 is inserted into the corresponding insertion hole 32133. The torsion spring 322 is firmly installed on the connecting portion 3213. The process of disassembling the torsion spring 322 is opposite to the above process, which will not be repeated here.

[0086] In some embodiments, the height of the working components of the raking attachment 100 relative to the ground is adjustable, so that the raking attachment 100 can work better. In this embodiment, the height of the tool holder shaft 20 of the raking attachment 100 and the cutting assembly 30 on the tool holder shaft 20 relative to the ground is adjustable. In this regard, the raking attachment 100 also includes a height adjustment mechanism 70, which can make the height of the tool holder shaft 20 relative to the ground adjustable. Specifically, the relative position of the tool holder shaft 20 and the housing 60 is fixed, the wheel 50 is kept in contact with the ground, the height adjustment mechanism 70 is directly or indirectly connected to the wheel 50 and the housing 60 respectively, and the height adjustment mechanism 70 adjusts the height of the tool holder shaft 20 relative to the ground by adjusting the height of the housing 60 relative to the wheel 50.

[0087] In order to facilitate the display of the details of the height adjustment mechanism 70, Fig.14 and Fig.15 The housing 60 is hidden in the Figure 13-Figure 15 As shown, the height adjustment mechanism 70 includes a gear member 71, a connecting rod 72 and a handle 73. The gear member 71 is fixedly connected to the housing 60 of the grass raking attachment 100, and a plurality of gears 711 are arranged on the gear member 71. The first end of the connecting rod 72 is connected to the wheel 50, and the second end of the connecting rod 72 is pivotally connected to the housing 60 (the pivot point is Fig.14 The handle 73 is fixedly connected to the connecting rod 72 and is used for user operation. The user can operate the handle 73 and select the handle 73 to cooperate with any gear position 711, so that the handle 73 drives the connecting rod 72 and the wheel 50 to rotate relative to the housing 60 and the tool holder shaft 20 and then locks. Since the height of the wheel 50 and the ground remains unchanged, when the housing 60 and the tool holder shaft 20 rotate relative to the handle 73, the connecting rod 72 and the wheel 50, the height of the tool holder shaft 20 and the housing 60 relative to the ground changes, thereby realizing the height adjustment of the working component relative to the ground.

[0088] In this embodiment, Fig.14 and Fig.15As shown, the gear position 711 can be a limiting hole (or limiting groove), and a plurality of gear positions 711 are arranged along an arc in a vertical plane. A bayonet 731 is provided on the handle 73. When the user operates the handle 73 to rotate relative to its second end, the bayonet 731 can be engaged in different limiting holes (or limiting grooves), thereby realizing the position locking of the gear member 71 and the handle 73, that is, realizing the position locking of the housing 60 and the wheel 50. In some embodiments, the gear member 71 and the bayonet 731 can be made of a material with a specific certain deformation ability, such as plastic, so that the bayonet 731 can smoothly cooperate with or separate from the gear position 711. In some embodiments, the bayonet 731 can also be connected to the handle 73 through an elastic component. When the user operates the handle 73, the bayonet 731 overcomes the force of the elastic component under the action of an external force and disengages from the limiting hole. When the user no longer operates the handle 73, the bayonet 731 remains in the position of being engaged in the limiting groove under the action of the elastic component, thereby realizing the position locking of the housing 60 and the wheel 50. In other embodiments, the gear position 711 may also be provided with a raised structure. In this case, a limiting hole is provided on the handle 73. When the limiting hole is engaged with different raised structures, the height adjustment of the tool holder shaft 20 can be achieved.

[0089] In this embodiment, Figure 1 , Figure 3 and Fig.13 As shown, the connecting rod 72 extends roughly along the radial direction of the wheel 50, and the first end of the connecting rod 72 is connected to the center of the wheel 50. The first end of the connecting rod 72 is in a sleeve relationship with the rotating shaft of the wheel 50. When the wheel 50 rotates, the first end of the connecting rod 72 does not rotate with the wheel 50. The raking attachment 100 also includes a connecting rod 51, which extends roughly in the horizontal direction. The connecting rod 51 is penetrated by the housing 60 and can rotate relative to the housing 60 around its axial direction. The second end of the connecting rod 72 is fixed to the connecting rod 51, thereby realizing a pivot connection with the housing 60. The handle 73 is set at an angle with the connecting rod 72, so that the matching positions of the shift member 71 and the handle 73 can be staggered with the center of the tool holder shaft 20 and the wheel 50, respectively, to avoid position interference.

[0090] In this embodiment, Figure 3 As shown, the grass raking attachment 100 is provided with the above-mentioned height adjustment mechanism 70 at one end along the width direction, and only a connecting rod 72 is provided at the other end. The connecting rod 72 and the connecting rod 72 of the height adjustment mechanism 70 are respectively connected to the two ends of the connecting rod 51. When the user operates the handle 73 of the height adjustment mechanism 70, the two ends of the shell 60 along the width direction change synchronously relative to the height of the two wheels 50, thereby making the height of the shell 60 and the two ends of the tool holder shaft 20 along the width synchronously adjusted.

[0091] In some embodiments, height adjustment components may also be provided at both wheels 50. In this embodiment, the connecting rods 72 of the two height adjustment components are respectively pivotally connected to the shell 60. In this embodiment, the heights of the shell 60 and the tool holder shaft 20 at both ends along the width direction are respectively adjusted relative to the ground.

[0092] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A grass raking attachment, comprising: A first coupling portion (10) for coupling to a main body (200) of a multi-head tool; Tool holder shaft (20); A cutting assembly (30) mounted on the tool holder shaft (20), wherein the cutting assembly (30) is configured to rotate synchronously with the tool holder shaft (20); It is characterized in that the cutting assembly (30) can be configured as a first cutting assembly or a second cutting assembly, and at least part of the cutting elements of the first cutting assembly and the second cutting assembly are different.

2. The raking attachment according to claim 1, characterized in that The raking attachment further comprises a detachable locking member (33), and when the locking member (33) is removed, the first cutting assembly or the second cutting assembly can be detached from the blade holder shaft (20).

3. The raking attachment according to claim 1, characterized in that: The cutting element of the first cutting assembly is a roller blade (31), and the roller blade (31) is sleeved on the blade holder shaft (20).

4. The raking attachment according to claim 1, characterized in that: The cutting element of the second cutting assembly is a torsion spring assembly (32), and the torsion spring assembly (32) is sleeved on the tool holder shaft (20).

5. The raking attachment according to claim 4, characterized in that The torsion spring assembly (32) comprises a torsion spring seat (321) and a torsion spring (322); the torsion spring seat (321) is sleeved on the tool holder shaft (20); and the torsion spring (322) is detachably connected to the torsion spring seat (321).

6. The raking attachment according to claim 1, characterized in that: The mowing attachment further comprises wheels (50), and the multi-tool is a hand-push multi-tool.

7. The raking attachment according to claim 6, characterized in that The grass raking attachment further comprises a height adjustment mechanism (70), wherein the height adjustment mechanism (70) is configured to make the height of the blade holder shaft (20) adjustable relative to the ground.

8. The raking attachment according to claim 7, characterized in that The raking attachment further comprises a height adjustment mechanism (70), wherein the height adjustment mechanism (70) comprises: A gear member (71) is fixedly connected to a housing (60) of the grass raking attachment and is provided with a plurality of gears (711), wherein the relative positions of the housing (60) and the cutter holder shaft (20) are fixed; A connecting rod (72), one end of which is connected to the wheel (50) and the other end of which is pivotally connected to the housing (60); A handle (73) is fixedly connected to the connecting rod (72), and the handle (73) can be selected to cooperate with any one of the gear positions (711) so that the connecting rod (72) and the wheel (50) are rotated relative to the housing (60) and the tool holder shaft (20) and then locked.

9. The raking attachment according to claim 1, characterized in that: The raking attachment further comprises a protective cover (63).

10. The raking attachment according to claim 9, characterized in that The protective cover (63) is a flip grass discharge baffle.

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