Cutting knife assembly and mower

Abstract

The mowing machine comprises the cutting knife assembly, the cutting knife assembly comprises a mounting base, a knife disc and a knife disc protective cover, a driving source is arranged in the mounting base and provided with an output shaft extending out of the mounting base, and the knife disc is connected to the end, extending out of the mounting base, of the output shaft; the cutterhead protective cover is arranged on the output shaft in a sleeving manner and is arranged between the mounting seat and the cutterhead; the side, facing the cutter head protective cover, of the cutter head is provided with a first waterproof rib arranged around the center axis of the cutter head, and / or the side, facing the cutter head, of the blade protective cover is provided with a second waterproof rib arranged around the center of the cutter head protective cover. The first waterproof rib and / or the second waterproof rib can block high-pressure water for washing, so that the high-pressure water can be prevented from entering the bottom shell or the mounting base to damage the driving source, the operation reliability of the mower is improved, and the use experience of a user is also improved.

Description

Technical Field

[0001] This application relates to the field of lawnmowers, and in particular to a blade assembly and a lawnmower. Background Technology

[0002] A lawnmower is a mechanical tool used for trimming lawns, vegetation, etc. It consists of a housing, a blade disc, a motor, wheels, a walking mechanism, blades, and a control unit. The blade disc is mounted at the bottom of the housing, and the motor drives the blades to rotate and cut the grass. This not only saves lawnmower workers' time but also reduces a significant amount of manpower.

[0003] During lawn mowing, it's inevitable that a significant amount of dirt or grass clippings will enter the casing. Therefore, to clean these residues, users connect a high-pressure water hose through the mower's dedicated rinsing interface after mowing, using the high-pressure water jet to rinse the bottom casing and blades. However, existing lawn mowers lack a waterproof design, leading to water ingress into the casing or motor during rinsing. This reduces product reliability and user experience. Utility Model Content

[0004] Based on this, and in view of the shortcomings of the prior art, this application provides a blade assembly and a lawnmower to solve the problem of water entering the housing or motor when the user washes the bottom housing and blade disc of the lawnmower.

[0005] According to one aspect of this application, a cutting tool assembly is provided, comprising:

[0006] Mounting base, wherein a drive source is provided within the mounting base, and the drive source has an output shaft extending out of the mounting base;

[0007] The cutter head is connected to the end of the output shaft that extends out of the mounting base;

[0008] A cutter head protective cover is sleeved on the output shaft and disposed between the mounting base and the cutter head;

[0009] The cutter head has a first waterproof rib arranged around the central axis of the cutter head on the side facing the cutter head protective cover, and / or the cutter head protective cover has a second waterproof rib arranged around the central axis of the cutter head protective cover on the side facing the cutter head.

[0010] In one embodiment, the cutter head is further provided with a connecting part arranged around the central axis of the cutter head on the side facing the cutter head protective cover. The connecting part forms a connecting position, and one end of the output shaft extending out of the mounting base is inserted into the connecting position.

[0011] The first waterproof rib is arranged radially at intervals along the cutter head on the side of the connecting portion away from the central axis of the cutter head, so that the first waterproof rib and the connecting portion form a water storage tank surrounding the central axis of the cutter head.

[0012] In one embodiment, one end of the output shaft extending outside the mounting base is connected to a cutter head fixing seat, which is installed in the connection position.

[0013] In one embodiment, the first waterproof rib is ring-shaped and has a drain outlet that extends through both sides of the first waterproof rib and connects to the water storage tank and the side of the first waterproof rib away from the connecting portion.

[0014] In one embodiment, there are multiple first waterproof ribs, which are spaced apart around the central axis of the cutter head, and each pair of adjacent first waterproof ribs forms a drain outlet that communicates with the water storage tank.

[0015] In one embodiment, the bottom wall of the water storage tank is provided with a drain outlet that penetrates the cutter head.

[0016] In one embodiment, the cutter head has a guide surface surrounding its own central axis, the guide surface being located on the side of the first waterproof rib opposite to the central axis of the cutter head; and the guide surface extends obliquely away from the central axis of the cutter head in the direction from the drive source toward the cutter head.

[0017] In one embodiment, the diameter of the ring formed by the second waterproof rib is greater than or less than the diameter of the ring formed by the first waterproof rib, so that the second waterproof rib is misaligned with the first waterproof rib in the radial direction of the cutter head.

[0018] In one embodiment, the inner cavity bottom wall of the mounting base is inclined relative to the horizontal plane, and the drive source is installed on the inner cavity bottom wall of the mounting base, so that both the drive source and the cutter head are inclined relative to the horizontal plane.

[0019] According to another aspect of this application, a lawnmower is provided, including a base and a cutter assembly as described in any of the above embodiments, wherein a mounting base for the cutter assembly is mounted on the base.

[0020] The aforementioned blade assembly and lawnmower, by providing a first waterproof rib along the central axis of the blade disc on the side of the blade disc facing the mounting base, and / or by providing a second waterproof rib around the central axis of the blade disc protective cover on the side of the blade disc facing the blade disc, can block the high-pressure water from the user's high-pressure washing of the lawnmower's bottom shell and blade disc. This prevents high-pressure water from entering the bottom shell or mounting base and damaging the drive source, thereby improving the lawnmower's operational reliability and enhancing the user experience. Attached Figure Description

[0021] Figure 1 This is an axonometric view of a cutter assembly provided in an embodiment of this application.

[0022] Figure 2 This is a cross-sectional view of a cutting assembly provided in an embodiment of this application.

[0023] Figure 3 for Figure 2 An enlarged schematic diagram of region A in the middle.

[0024] Figure 4 This is an isometric view of a cutter head provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Cutting blade assembly; 100. Mounting base; 200. Drive source; 201. Output shaft; 300. Cutting head; 301. Connecting part; 302. Connecting position; 303. First waterproof rib; 304. Water storage tank; 305. Drain outlet; 306. Guide surface; 400. Cutting head protective cover; 401. Second waterproof rib; 500. Blade; 600. Cutting head fixing base. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] This application provides a blade assembly and a lawnmower, wherein the lawnmower includes a base (not shown) and a blade assembly, the blade assembly is mounted on the base, the lawnmower is used to trim lawns, and the blade assembly is used to cut tall grasses when the lawnmower trims the lawn so as to make the lawn grass flat.

[0034] The following description uses the application of the cutter assembly in a lawnmower as an example to illustrate the results of using the cutter assembly. It is understood that in other embodiments, the cutter assembly of this application is not limited to lawnmowers, but can also be applied to any other device with cutting requirements, and is not limited thereto.

[0035] See Figure 1 and Figure 2 , Figure 1 This paper shows an axonometric view of a cutter assembly 10 provided in one embodiment of the present application. Figure 2 A cross-sectional view of the internal structure of the cutter assembly 10 in this embodiment is shown. The cutter assembly 10 provided in one embodiment of this application includes a mounting base 100, a drive source 200, a cutter disc 300, and a cutter disc protective cover 400. The mounting base 100 is mounted on the bottom housing of the lawnmower. The drive source 200 is mounted in the mounting base 100 and has an output shaft 201 extending out of the mounting base 100. The cutter disc 300 is connected to the output shaft 201 of the drive source 200. The cutter disc mounting base 100 is sleeved on the output shaft 201 and disposed between the mounting base 100 and the cutter disc 300. In this embodiment, the drive source 200 can be a motor, which drives the cutter disc 300 to rotate around its own central axis, so that the cutter disc 300 can cut grass through its high-speed rotation. The cutter disc protective cover 400 is used to protect the cutter disc 300 to prevent damage from debris flying from the grass during mowing.

[0036] In some embodiments, the edge of the cutter head 300 may be sharp-edged, so that the grass can be cut directly using the edge of the cutter head 300. Alternatively, as shown in the figure, multiple blades 500 may be installed on the edge of the cutter head 300. The multiple blades 500 are spaced apart around the central axis of the cutter head 300. When the cutter head 300 rotates at high speed around its own central axis, the blades 500 rotate with the cutter head 300 to cut the grass.

[0037] Specifically, such as Figure 3 As shown in the embodiment illustrated, one end of the output shaft 201 extending beyond the mounting base 100 is connected to a tool disc fixing seat 600, which is connected to the tool disc 300. More specifically, the tool disc 300 has a connecting portion 301 on the side facing the mounting base 100. The connecting portion 301 is arranged around the central axis of the tool disc 300 and forms a connecting position 302. The tool disc fixing seat 600 is fixedly installed in the connecting position 302, so that the tool disc 300 is connected to the output shaft 201 of the drive source 200 through the tool disc fixing seat 600. When the output shaft 201 of the drive source 200 rotates, the tool disc 300 can rotate together under the drive of the output shaft 201. Of course, it can be understood that the end of the output shaft 201 of the drive source 200 extending beyond the mounting base 100 can also be directly inserted into the connecting position 302, so that the output shaft 201 of the drive source 200 is directly connected to the tool disc 300, which is not limited here.

[0038] However, as described in the background section, during the mowing process, a significant amount of dirt or grass clippings inevitably enters the casing. Therefore, to clean away the residual dirt and grass clippings, after mowing, users connect a high-pressure water hose through the mower's dedicated rinsing interface to use the high-pressure water jet to rinse the bottom casing and blade disc 300. However, existing mowers lack a waterproof design, leading to water ingress into the casing or motor during rinsing, thus reducing the mower's operational reliability and user experience.

[0039] Therefore, to resolve the above issues, please continue reading. Figure 3 As an improvement to the above embodiment, the cutter head 300 has a first waterproof rib 303 arranged around the central axis of the cutter head 300 on the side facing the cutter head protective cover 400, and the cutter head protective cover 400 has a second waterproof rib 401 arranged around the central axis of the cutter head protective cover 400 on the side facing the cutter head 300.

[0040] Thus, when the user performs high-pressure washing on the bottom shell and blade 300 of the lawnmower after completing the work, the first waterproof rib 303 and the second waterproof rib 401 can block the high-pressure water from entering the bottom shell or the mounting base 100 and causing damage to the drive source 200, thereby improving the operational reliability of the lawnmower and the user experience.

[0041] It is understood that in other embodiments, only the cutter head 300 may have a first waterproof rib 303, while the cutter head protective cover 400 may not have a second waterproof rib 401, or only the cutter head protective cover 400 may have a second waterproof rib 401, while the cutter head 300 may not have a first waterproof rib 303; this is not limited here. However, by providing a first waterproof rib 303 on the cutter head 300 and a second waterproof rib 401 on the cutter head protective cover 400, the high-pressure water flow can be blocked regardless of whether the water jet from the high-pressure water pipe is directed upwards or downwards, which obviously has a better technical effect.

[0042] Furthermore, in a preferred embodiment, the first waterproof ribs 303 are radially spaced along the cutter head 300 on the side of the connecting portion 301 opposite to the central axis of the cutter head 300, so that the first waterproof ribs 303 and the connecting portion 301 form a water storage tank 304 surrounding the central axis of the cutter head 300. The purpose of providing the water storage tank 304 is that when the user rinses, even if a small amount of water crosses the first waterproof ribs 303 or the second waterproof ribs 401, the water that crosses the first waterproof ribs 303 or the second waterproof ribs 401 can be contained in the water storage tank 304, thus further preventing water from entering the mounting base 100 and contacting the drive source 200.

[0043] In a preferred embodiment, the diameter of the annulus formed by the second waterproof rib 401 is larger or smaller than the diameter of the annulus formed by the first waterproof rib 303, so that the second waterproof rib 401 and the first waterproof rib 303 are misaligned in the radial direction of the cutter head 300. For example, as shown in the figure, the diameter of the annulus formed by the second waterproof rib 401 is smaller than the diameter of the annulus formed by the first waterproof rib 303. In this way, when water flows towards the second waterproof rib 401, the water adhering to the second waterproof rib 401 can drip into the water storage tank 304, thereby preventing water splashing. Alternatively, when the diameter of the annulus formed by the second waterproof rib 401 is larger than the diameter of the annulus formed by the first waterproof rib 303, the water flowing towards the second waterproof rib 401 can be blocked by the second waterproof rib 401 and will not enter the connection position 302, which also has a good waterproof effect.

[0044] Furthermore, in order to drain the water from the water storage tank 304, such as... Figure 4 As shown, the first waterproof rib 303 is annular, and has drainage outlets 305 extending through both sides of its thickness direction. The drainage outlets 305 connect the water storage tank 304 and the side of the first waterproof rib 303 away from the connecting part 301. Water in the water storage tank 304 can be discharged outside the water storage tank 304 through the drainage outlets 305. The number of drainage outlets 305 is not limited; there can be one or more. When there are multiple drainage outlets 305, they are spaced apart around the central axis of the cutter head 300.

[0045] It is understandable that there may be multiple first waterproof ribs 303, and multiple first waterproof ribs 303 are arranged at intervals around the central axis of the cutter head 300. Each pair of adjacent first waterproof ribs 303 forms a drain outlet 305 that connects to the water storage tank 304.

[0046] Alternatively, in one embodiment, the bottom wall of the water storage tank 304 is provided with a drain outlet that penetrates the cutter head 300, so that the water in the water storage tank 304 can be drained to the ground through the drain outlet, which can also achieve the same technical effect as the above embodiment.

[0047] After water is discharged from the water storage tank 304 through the drain outlet 305, in order to allow the water to flow to the ground quickly and avoid water adhering to the cutter head 300 for a long time, please continue to refer to... Figure 4 In a preferred embodiment, the cutter head 300 has a guide surface 306 surrounding its own central axis, the guide surface 306 being located on the side of the first waterproof rib 303 away from the central axis of the cutter head 300; and the guide surface 306 extends obliquely away from the central axis of the cutter head 300 in the direction from the drive source 200 toward the cutter head 300.

[0048] In this way, at least a portion of the cutter head 300 is conical, and the water discharged from the drain outlet 305 can flow quickly to the ground along the guide surface 306 under the action of gravity, thus preventing residual water from adhering to the cutter head 300 for a long time.

[0049] Additionally, see Figure 2 In one embodiment, the bottom wall of the inner cavity of the mounting base 100 is inclined relative to the horizontal plane, and the drive source 200 is mounted on the bottom wall of the inner cavity of the mounting base 100, so that both the drive source 200 and the cutter head 300 are inclined relative to the horizontal plane. As a preferred embodiment, the angle range of the inclination of the drive source 200 and the cutter head 300 relative to the horizontal plane is 0°-2°. By tilting the cutter head 300, during grass cutting, the blade 500 located at the lower radial end of the cutter head 300 cuts first in an inclined cutting manner. In this way, on the one hand, the blade 300 or blade 500 experiences less resistance when mowing, making it easier to cut; on the other hand, it can prevent weeds from getting tangled, and when encountering larger debris such as branches, the cutting blade 500 can smoothly move them to the rear, avoiding affecting the normal operation of the cutting blade 500; furthermore, since the blade 500 at the lower end has already cut the grass, the blade 500 does not need to perform a second cut when rotating to the higher end, thus better protecting the blade 500 and preventing it from wearing out too quickly.

[0050] It should be noted that the number of blade components 10 in the lawnmower is unlimited; there can be one or more. When there are multiple blade components 10, the mowing area can be expanded and the mowing efficiency can be improved.

[0051] Therefore, the lawnmower provided in this application, by setting a first waterproof rib 303 and a second waterproof rib 401 to form a waterproof structure in the cutter assembly 10, and by setting a connecting part 301 to form a water storage tank 304 with the first waterproof rib 303, and opening a drain outlet 305 on the bottom or side wall of the water storage tank 304, can effectively prevent the flushing water from entering the mounting base 100 and damaging the drive source 200, and can better guide the water, confining the water to a specific area and preventing water from splashing in all directions. It can also drain water quickly and prevent water from adhering to the blade disc 300 for a long time. At the same time, by tilting the blade disc 300, the cutter assembly 10 can not only have a better cutting effect, but also better protect the blade 500. All of the above can better improve the user experience and enhance the product's competitiveness in the market.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cutting tool assembly, characterized in that, include: Mounting base (100), wherein a drive source (200) is provided in the mounting base (100), and the drive source (200) has an output shaft (201) extending out of the mounting base (100); The cutter head (300) is connected to the end of the output shaft (201) that extends out of the mounting base (100); A cutter head protective cover (400) is sleeved on the output shaft (201) and disposed between the mounting base (100) and the cutter head (300); The cutter head (300) has a first waterproof rib (303) arranged around the central axis of the cutter head (300) on the side facing the cutter head protective cover (400), and / or the cutter head protective cover (400) has a second waterproof rib (401) arranged around the central axis of the cutter head protective cover (400) on the side facing the cutter head (300).

2. The cutting tool assembly according to claim 1, characterized in that, The cutter head (300) is also provided with a connecting part (301) arranged around the central axis of the cutter head (300) on the side facing the cutter head protective cover (400). The connecting part (301) forms a connecting position (302). One end of the output shaft (201) extending out of the mounting base (100) is inserted into the connecting position (302). The first waterproof rib (303) is arranged radially at intervals along the cutter head (300) on the side of the connecting part (301) away from the central axis of the cutter head (300), so that the first waterproof rib (303) and the connecting part (301) form a water storage tank (304) surrounding the central axis of the cutter head (300).

3. The cutting tool assembly according to claim 2, characterized in that, The output shaft (201) extends out of the mounting base (100) and is connected to a cutter head fixing base (600), which is installed in the connection position (302).

4. The cutting tool assembly according to claim 2, characterized in that, The first waterproof rib (303) is ring-shaped and has a drain outlet (305). The drain outlet (305) passes through both sides of the first waterproof rib (303) and connects the water storage tank (304) and the side of the first waterproof rib (303) away from the connecting part (301).

5. The cutting tool assembly according to claim 2, characterized in that, The first waterproof rib (303) has multiple ribs, and the multiple first waterproof ribs (303) are spaced apart around the central axis of the cutter head (300). Each pair of adjacent first waterproof ribs (303) forms a drain outlet (305) that communicates with the water storage tank (304).

6. The cutting tool assembly according to claim 2, characterized in that, The bottom wall of the water storage tank (304) is provided with a drain outlet (305) that penetrates the cutter head (300).

7. The cutting tool assembly according to claim 1, characterized in that, The cutter head (300) has a guide surface (306) surrounding its own central axis, the guide surface (306) being located on the side of the first waterproof rib (303) away from the central axis of the cutter head (300); and from the direction of the drive source (200) toward the cutter head (300), the guide surface (306) extends obliquely away from the central axis of the cutter head (300).

8. The cutting tool assembly according to claim 1, characterized in that, The diameter of the ring formed by the second waterproof rib (401) is greater than or less than the diameter of the ring formed by the first waterproof rib (303), so that the second waterproof rib (401) and the first waterproof rib (303) are misaligned in the radial direction of the cutter head (300).

9. The cutting tool assembly according to claim 1, characterized in that, The inner cavity bottom wall of the mounting base (100) is inclined relative to the horizontal plane, and the drive source (200) is installed on the inner cavity bottom wall of the mounting base (100) so that both the drive source (200) and the cutter head (300) are inclined relative to the horizontal plane.

10. A lawnmower, characterized in that, It includes a bottom shell and a cutter assembly (10) according to any one of claims 1-9, wherein a mounting base (100) of the cutter assembly (10) is mounted on the bottom shell.

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