Lawn mower

Abstract

The utility model provides a mower, include: body body, the body body includes drive motor and the shell of surrounding drive motor, cutting mechanism, cutting mechanism includes the cutter head, cutter head cover and grass guard, the cutter head sets up drive shaft of drive motor on, cutter head cover connects shell, to form the accommodation space of built -in cutter head, grass guard is connected with cutter head cover through connecting piece to set up below cutter head, connecting piece sets up in the tail of cutter head cover. The utility model has solved relevant technique because of existing grass guard and motor coaxial arrangement in the process of using, motor load increases, influence motor's work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a lawnmower. Background Technology

[0002] Traditional lawnmowers have a large contact area between the blade and the grass. The grass exerts upward pressure on the blade, which causes the blade to experience significant resistance. The greater the weight of the lawnmower and the denser the grass, the greater the resistance experienced by the blade.

[0003] In order to reduce the contact between the non-cutting part of the blade disc and the grass and reduce the resistance exerted by the grass on the blade disc during the operation of the lawnmower, a blade guard is installed on the motor shaft that connects the blades to physically isolate the blade disc from the grass.

[0004] For example, Chinese patent document CN222485385U discloses a cutting device for a lawnmower and a lawnmower, including a grass guard assembly rotatably connected to a blade disc bracket. The grass guard assembly further includes a grass guard disc, which is positioned below the blade disc to isolate the blade disc from the lawn. The blade disc bracket is connected to a rotating shaft via a connector, and this rotating shaft is a motor shaft; that is, the grass guard disc assembly is rotatably connected to the motor shaft. Although this related technology has solved the problem of energy loss caused by friction between the bottom of the blade disc and the lawn during the cutting process to some extent, the following defects still exist: during use, the grass guard disc is coaxially arranged with the motor, and the grass guard disc may also rotate while the blade disc rotates, thus affecting the operating efficiency of the motor. Utility Model Content

[0005] One technical problem that this utility model aims to solve is that, in the case of related technologies, the grass-protecting disc is coaxially set with the motor during use, which increases the motor load and affects the motor's operating efficiency.

[0006] To solve the above-mentioned technical problems, this utility model provides a lawnmower.

[0007] The lawnmower includes: a main body, the main body including a drive motor and a housing surrounding the drive motor; a cutting mechanism including a blade disc, a blade disc cover, and a grass guard disc, the blade disc being mounted on the drive shaft of the drive motor; the blade disc cover being connected to the housing to form a receiving space for housing the blade disc; the grass guard disc being connected to the blade disc cover via a connector and positioned below the blade disc; the connector being positioned at the rear of the blade disc cover.

[0008] The lawnmower provided by this utility model sets the blade cover of the cutting mechanism on the outer shell of the machine body to enclose the drive motor, and then connects the grass guard to the blade cover through a connector and sets it below the blade. The connector is set at the tail of the blade cover. In this way, without affecting the cutting of the blade, the grass guard, the blade cover and the motor shaft are avoided to be set coaxially. This solves the problem of related technologies where the grass guard and the drive motor are set coaxially during use, which increases the motor load and affects the motor's working efficiency.

[0009] Preferably, the connector includes a horizontal mounting plate, the two ends of which are connected to the skirts on both sides of the cutter head cover. The mounting plate is parallel to the horizontal plane, and the grass protector is fixedly mounted on the mounting plate by bolts. The mounting plate, positioned between the skirts on both sides of the cutter head cover, increases the overall structural strength of the cover. The grass protector, connected to the cover via the mounting plate, is also positioned within the enclosed area of ​​the two skirts, thus preventing excessive contact or impact between the grass protector and the external environment during mower operation. This effectively prevents structural damage to the grass protector and the connection point between the grass protector and the mounting plate.

[0010] Preferably, the connector further includes a reinforcing plate, one end of which is connected to the mounting plate and the other end to the inner wall of the tail of the cutter head cover. Multiple reinforcing plates are spaced apart to form a grid-like support structure with the mounting plate. The reinforcing plates enhance the stability of the mounting plate on the cutter head cover, preventing the grass guard disc from swaying up and down with the mounting plate during mowing, and effectively preventing the bolts connecting the grass guard disc and the mounting plate from loosening or falling off.

[0011] Preferably, the connector is columnar, with one end disposed on the inner wall surface of the tail of the blade cover, and the other end having a threaded mounting hole along its axial direction for fixing the grass guard disc with bolts. At this point, the installed connector, grass guard disc, and the inner wall surface of the tail of the blade cover form a closed grid-like structure, effectively ensuring the stability and strength of the structural connection between the blade cover and the grass guard disc via the connector.

[0012] Preferably, the connector includes a second mounting plate connected to the inner wall of the tail of the cutter head cover. The second mounting plate is spaced between the skirts on both sides of the cutter head cover and is perpendicular to the horizontal plane. The connection between the second mounting plate and the inner wall of the tail of the cutter head cover increases the connection strength. The spaced mounting plate between the skirts on both sides of the cutter head cover allows the skirts to protect the grass-protecting disc from the gaps between the skirts and the second mounting plate, and between the skirts and the grass-protecting disc, without affecting the movement of broken grass into the receiving space during mower operation. This effectively protects the grass-protecting disc and its connection structure with the connector.

[0013] Preferably, the grass-protecting disc includes an extension plate, which is L-shaped to the body of the grass-protecting disc. The extension plate is connected to the mounting plate, allowing the grass-protecting disc to be installed below the blade disc. The extension plate makes the overall structure of the grass-protecting disc L-shaped, changing the connection between the grass-protecting disc and the connector from a vertical bolt connection to a horizontal installation. This facilitates installation and makes it easier to visually inspect for loose bolts during use. Furthermore, the L-shaped structure reduces vertical swaying of the grass-protecting disc during use, improving the overall stability of the lawnmower.

[0014] Preferably, the mounting plate is provided with a discharge port for emptying the containing space of broken grass. The discharge port prevents the tail of the blade cover from being closed after the mounting plate is connected to the grass-protecting disc, thus avoiding difficulty in removing broken grass entering the containing space.

[0015] Preferably, the body of the grass-protecting disc has a plate-like structure, and the orthographic projection area of ​​the grass-protecting disc on the plane where the blade disc is located is not less than the area of ​​the blade disc. This allows the grass-protecting disc to effectively protect the blade disc.

[0016] Preferably, the distance between the plane of the grass guard disc and the plane of the blade disc is 2mm to 8mm. This allows for a reduction in the overall size of the lawnmower while ensuring the normal operation of the blade disc and grass guard disc, preventing excessive grass breakage from entering, and thus reducing the probability of malfunctions.

[0017] Preferably, the grass-protecting disc and the connector are integrally formed; this can avoid installation errors in the structural connection between the grass-protecting disc 203 and the connector 3, or the easy loosening and falling off of bolt connections during use; and / or, the connector and the cutter head cover are integrally formed, which can further enhance the structural strength of the cutter head cover and reduce installation errors. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the overall structure of the lawnmower disclosed in this embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the combined longitudinal cross-sectional structure;

[0021] Figure 3 yes Figure 1 Exploded view of the local structure;

[0022] Figure 4 yes Figure 3 An illustration of another type of connector structure;

[0023] Figure 5 yes Figure 4 A schematic diagram of the side elevation structure.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Main body; 101. Drive motor; 102. Outer shell; 2. Cutting mechanism; 201. Cutting disc; 202. Cutting disc cover; 2021. Skirt; 203. Grass guard disc; 2031. Extension plate; 204. Accommodation space; 3. Connecting parts; 301. Mounting plate one; 302. Reinforcing plate; 303. Mounting plate two; 4. Bolts; 5. Discharge port. Detailed Implementation

[0026] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0027] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0028] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are only for the convenience of describing this utility model 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 utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] Furthermore, the terms "one," "two," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" indicate that the element preceding the word encompasses the element listed after it, but do not exclude the possibility of including other elements.

[0030] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0031] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0033] like Figures 1 to 5As shown, this utility model provides a lawnmower, including a body 1 and a cutting mechanism 2. The body 1 includes a drive motor 101 and a housing 102 surrounding the drive motor 101. The cutting mechanism 2 includes a blade disc 201, a blade disc cover 202, and a grass guard disc 203. The blade disc 201 is mounted on the drive shaft of the drive motor 101 and rotates under the drive shaft to perform cutting operations. The blade disc cover 202 is connected to the housing 102 of the drive motor 101, forming a space 204 for accommodating the built-in blade disc 201. The connection between the blade disc cover 202 and the housing 102 can be achieved by a structural snap-fit ​​connection for easy disassembly and assembly, or by a bolt connection. Considering the overall structural stability of the lawnmower, the blade disc cover 202 and the housing 102 can also be injection molded as a single piece. The grass guard 203 is connected to the cutter head cover 202 via the connector 3 and is positioned below the cutter head 201. This effectively prevents excessive friction between the cutter head 201 and the grass below it due to an excessively large contact area or unnecessary excessive contact during non-cutting operations, which would otherwise affect cutting efficiency. The connector 3 is located at the rear of the cutter head cover 202, thus preventing the structural design from affecting the normal operation of the cutter head 201.

[0034] The lawnmower provided by this utility model, by setting the blade cover 202 of the cutting mechanism 2 on the outer shell 102 of the machine body 1 to enclose the drive motor 101, and then connecting the grass guard 203 to the blade cover 202 through the connector 3 and setting it below the blade 201, with the connector 3 set at the tail of the blade cover 202, avoids the coaxial setting of the grass guard 203, blade cover 202 and motor shaft without affecting the cutting of the blade 201. This solves the problem in related technologies where the coaxial setting of the grass guard and the drive motor increases the motor load and affects the working efficiency of the motor.

[0035] In an optional embodiment of this utility model, the connecting member 3 includes a horizontal mounting plate 301. Both ends of the mounting plate 301 are connected to the skirt 2021 of the blade cover 202. The mounting plate 301 is parallel to the horizontal plane. It should be noted that "parallel to the horizontal plane" specifically refers to the relative state when the lawnmower is placed on the ground or operating perpendicularly to the ground. The grass guard disc 203 is fixedly mounted on the mounting plate 301 with bolts. The mounting plate 301 is horizontally positioned between the skirts 2021 of the cutter head cover 202, which effectively enhances the structural strength of the cutter head cover 202. The grass guard 203 is positioned at the bottom of the cutter head 201 through the mounting plate 301, so that the grass guard 203 is enclosed by the skirts 2021 on both sides of the cutter head cover 202 after installation. This provides built-in protection for the structure of the grass guard 203 itself and the structure of the connection between the grass guard 203 and the mounting plate 301, preventing damage to the grass guard 203 and the connection position between it and the mounting plate 301 due to excessive external contact or bumps during lawnmower operation.

[0036] In an optional embodiment of this utility model, the connecting member 3 further includes a reinforcing plate 302. One end of the reinforcing plate 302 is connected to the mounting plate 301, and the other end is connected to the inner wall of the tail of the blade cover 202. Multiple reinforcing plates 302 are spaced apart to form a grid-like support structure with the mounting plate 301. The reinforcing plate 302 is vertically positioned between the mounting plate 301 and the inner wall of the tail of the blade cover 202, providing support for the stability of the mounting plate 301 in the mounting position of the blade cover 202. This makes the structural connection between the mounting plate 301 and the grass guard 203 more stable, preventing the bolts 4 used to connect the mounting plate 301 and the grass guard 203 from loosening and falling off due to vibrations of the machine body during use. The grid-like support formed between the reinforcing plate 302 and the mounting plate 301 is beneficial to the overall stability of the lawnmower structure and can prevent local structural shaking during use.

[0037] In a further optional embodiment of this utility model, the grid-like support structure formed by the mounting plate 301 and the reinforcing plate 302 can serve as the discharge port 5 at the tail of the cutter head cover 202 to prevent broken grass from accumulating in the accommodating space 204 and affecting the normal operation of the cutter head 201.

[0038] In a further optional embodiment of this utility model, when there is only one reinforcing plate 302, the reinforcing plate 302 is located in the middle position of the mounting plate 301. When there are multiple reinforcing plates 302, the multiple reinforcing plates 302 are evenly distributed along the length direction of the mounting plate 301 to increase the stability of the overall structure of the lawnmower and prevent unnecessary swaying during use.

[0039] In an optional embodiment of this utility model, the connector 3 is columnar, with one end of the connector 3 disposed on the inner wall surface of the tail of the blade cover 202, and the other end of the connector 3 having a threaded mounting hole along its axial direction for fixing the grass guard 203 with bolts. At this point, the installed connector 3, the grass guard 203, and the inner wall surface of the tail of the blade cover 202 form a closed grid-like structure, thereby effectively ensuring the stability and strength of the structural connection between the blade cover 202 and the grass guard 203 through the connector 3.

[0040] In an optional embodiment of this utility model, the connecting member 3 includes a second mounting plate 303 connected to the inner wall of the tail of the cutter head cover 202. The second mounting plate 303 is spaced between the skirts 2021 on both sides of the cutter head cover 202, and the second mounting plate 303 is perpendicular to the horizontal plane. Figure 4 and Figure 5 As shown, the long side of the mounting plate 303 is connected to the inner wall of the tail of the cutter head cover 202, which can increase the connection strength between the mounting plate 303 and the tail of the cutter head cover 202. The mounting plate 303 is spaced between the skirts 2021 on both sides of the cutter head cover 202. Without affecting the grass cuttings entering the receiving space 204 during the operation of the lawnmower, the skirts 2021 can protect the grass protection disc from the gaps between the skirts 2021 and the mounting plate 303, and between the skirts 2021 and the grass protection disc 203. This effectively protects the grass protection disc 203 and its connection structure with the connector 3.

[0041] In a further optional embodiment of this utility model, the side of the mounting plate 303 connected to the cutter head cover 202 is fitted with the inner wall shape of the tail of the cutter head cover 202. For example, when the cutter head cover 202 is provided with an arc-shaped chamfer near the skirt edge 2021, the side of the mounting plate 303 used to connect to the cutter head cover 202 is also provided with a chamfer.

[0042] In an optional embodiment of this utility model, the grass-protecting disc 203 includes an extension plate 2031. The extension plate 2031 and the body of the grass-protecting disc 203 are arranged in an L-shape. The extension plate 2031 is connected to the mounting plate 303 so that the grass-protecting disc 203 is installed below the blade disc 201. The extension plate 2031 makes the overall structure of the grass-protecting disc 203 L-shaped, and the connection method between the grass-protecting disc 203 and the connecting piece 3 is changed from a vertical bolt connection to a horizontal installation method. This facilitates installation and makes it easier to visually inspect whether the bolts are loose during use. Furthermore, the L-shaped structure reduces the vertical swaying of the grass-protecting disc 203 during use, improving the overall stability of the lawnmower.

[0043] In an optional embodiment of this utility model, the mounting plate 2 303 is provided with an outlet 5 for emptying the accommodating space 204 of broken grass. The outlet 5 can prevent the tail of the blade cover 202 from being closed after the mounting plate 2 303 is connected to the grass guard 203, thus making it difficult to remove the broken grass that enters the accommodating space 204.

[0044] In an optional embodiment of this utility model, the body of the grass-protecting disc 203 is plate-shaped, and the orthographic projection area of ​​the grass-protecting disc 203 on the plane where the blade disc 201 is located is not less than the area of ​​the blade disc 201, so that the grass-protecting disc 203 can effectively protect the blade disc 201.

[0045] In an optional embodiment of this utility model, the distance between the plane of the grass guard 203 and the plane of the blade disc 201 is 2mm-8mm. This reduces the overall size of the lawnmower while ensuring the normal operation of the blade disc 201 and the grass guard 203, preventing excessive grass breakage from entering and thus reducing the probability of malfunctions. The distance of 2mm-8mm was determined by the inventors based on a comprehensive consideration of the single-sided cutting efficiency of the blade disc 201, the cutting efficiency of the drive motor 101 driving the blade disc 201, and the discharge of grass breakage entering the accommodating space 204 of the blade disc 201 during actual use of the lawnmower. It is not a result obtained through conventional screening.

[0046] In an optional embodiment of this utility model, the grass-protecting disc 203 and the connector 3 are integrally formed, which can avoid installation errors in the structural connection between the grass-protecting disc 203 and the connector 3, or the easy loosening and falling off of bolt connections during use. Furthermore, the connector and the blade cover can be integrally formed, which can further enhance the structural strength of the blade cover and reduce installation errors.

[0047] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0048] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A lawnmower, characterized in that, include: The fuselage body includes a drive motor and a housing surrounding the drive motor; A cutting mechanism, comprising a blade disc, a blade disc cover, and a grass-protecting disc, wherein the blade disc is mounted on the drive shaft of the drive motor; the blade disc cover is connected to the outer casing to form a receiving space for housing the blade disc; the grass-protecting disc is connected to the blade disc cover via a connector and is positioned below the blade disc; the connector is positioned at the tail of the blade disc cover.

2. The lawnmower according to claim 1, characterized in that, The connector includes a horizontal mounting plate, the two ends of which are respectively connected to the skirts on both sides of the cutter head cover. The mounting plate is parallel to the horizontal plane, and the grass guard is fixedly mounted on the mounting plate by bolts.

3. The lawnmower according to claim 2, characterized in that, The connector also includes a reinforcing plate, one end of which is connected to the mounting plate and the other end of which is connected to the inner wall of the tail of the cutter head cover. Multiple reinforcing plates are spaced apart to form a grid-like support structure with the mounting plate.

4. The lawnmower according to claim 1, characterized in that, The connector is columnar, with one end disposed on the inner wall of the tail of the cutter head cover, and the other end of the connector having a threaded mounting hole along its axial direction for fixing the grass guard disc with bolts.

5. The lawnmower according to claim 1, characterized in that, The connector includes a second mounting plate that is connected to the inner wall of the tail of the cutter head cover. The second mounting plate is spaced between the skirts on both sides of the cutter head cover and is perpendicular to the horizontal plane.

6. The lawnmower according to claim 5, characterized in that, The grass-protecting disc includes an extension plate, which is L-shaped with the body of the grass-protecting disc. The extension plate is connected to the mounting plate 2 so that the grass-protecting disc is installed below the blade disc.

7. The lawnmower according to claim 5, characterized in that, The mounting plate is provided with an outlet for emptying the broken grass from the containing space.

8. The lawnmower according to claim 1, characterized in that, The main body of the grass-protecting disc has a plate-like structure, and the orthographic projection area of ​​the grass-protecting disc on the plane where the blade disc is located is not less than the area of ​​the blade disc.

9. The lawnmower according to claim 1, characterized in that, The distance between the plane on which the body of the grass-protecting disc is located and the plane on which the blade disc is located is 2mm to 8mm.

10. The lawnmower according to claim 1, characterized in that, The grass-protecting disc is integrally formed with the connector; and / or, the connector is integrally formed with the blade cover.

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