Cutter deck protection assembly and lawn mower

Abstract

Provided are a cutter deck protection assembly (1) and a lawn mower (2). The cutter deck protection assembly (1) comprises a protection member (12), wherein the protection member (12) is connected to the lawn mower (2) and is located on the peripheral side of a cutter deck (3); there is an included angle between an extension surface of the protection member (12) and a cutting plane (S) of the cutter deck (3), and the protection member (12) extends in the traveling direction of the lawn mower (2); and in the axial direction of the cutter deck (3), the side of the protection member (12) away from the lawn mower (2) comprises a protection end (121), and there is a preset distance (A) between the protection end (121) and a landing surface (D) of the lawn mower (2), such that the protection member (12) shields the cutter deck (3) and prevents unintended objects from coming into contact with or approaching the cutter deck (3). Using the cutter deck protection assembly (1) can improve the protection of the cutter deck (3), thereby reducing the risk of accidental injury to users, and improving a lawn-mowing effect.

Description

A blade guard assembly and a lawnmower

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese patent applications No. 202510147617.4, filed on February 10, 2025, entitled "A blade disc protection component and a lawnmower"; and No. 202520205933.8, filed on February 10, 2025, entitled "A blade disc protection component and a lawnmower". The entire contents of the Chinese patent applications are incorporated herein by reference. Technical Field

[0003] This disclosure relates to, but is not limited to, the field of lawnmower technology, and particularly to a blade guard assembly and a lawnmower. Background Technology

[0004] Lawn mowers are widely used in various lawns, gardens, and public green spaces, resulting in efficient lawn maintenance. However, the high-speed rotating blades not only cut plants but also pose potential safety hazards. Summary of the Invention

[0005] To address the aforementioned issues, the blade protection assembly and lawnmower disclosed herein can improve blade protection, reduce the risk of accidental injury to the user, and enhance mowing efficiency.

[0006] This disclosure provides a blade disc protection assembly, which includes a protective member connected to a lawnmower and located around the blade disc. The extension surface of the protective member forms an angle with the cutting plane of the blade disc, and the protective member extends along the travel direction of the lawnmower. Along the axial direction of the blade disc, the side of the protective member away from the lawnmower includes a protective end, and the protective end has a preset distance from the landing surface of the lawnmower. The protective member can shield the blade disc and prevent unintended objects from contacting or approaching the blade disc.

[0007] The blade disc protection assembly disclosed herein connects to the lawnmower via a main body. The protective element is connected to the main body and located around the blade disc. This protective element protects the blade disc from the circumference. Because the extended surface of the protective element forms an angle with the cutting plane of the blade disc, when the protective element is located in the area of ​​the blade disc's cutting plane, it can block the plane formed by the blade disc's cutting, thus blocking the cutting material and achieving the effect of protecting the blade disc, reducing the risk of the user being cut. Furthermore, a preset distance exists between the protective end and the lawnmower's landing surface along the blade disc's axial direction. This preset distance allows objects that need to be cut, such as plants, to enter between the protective end and the lawnmower's landing surface, while preventing objects larger than the preset distance from entering between the protective end and the lawnmower's landing surface. This improves the protective effect of the protective element on the blade disc and reduces the risk of accidental injury to the user. Because of the protective components on the blade disc, the blade disc can be positioned closer to the edge of the lawnmower, or it can extend beyond the lawnmower's exterior. This results in less grass remaining at the lawn edges during mowing, leading to better mowing performance. Therefore, the blade disc protection assembly provided in this disclosure improves the protection of the blade disc, reduces the risk of accidental injury to the user, and enhances mowing efficiency.

[0008] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments of this disclosure will be described below.

[0010] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0011] Figure 1 is a front view of a lawnmower and a blade protection assembly provided in an embodiment of this disclosure.

[0012] Figure 2 is one of the structural schematic diagrams of the cutter head protection assembly provided in the embodiments of this disclosure;

[0013] Figure 3 is a front view of the cutter head protection assembly and the cutter head provided in an embodiment of this disclosure;

[0014] Figure 4 is a schematic diagram (front view) of the connection between the lifting device and the main body in the cutter head protection assembly provided in this embodiment of the present disclosure.

[0015] Figure 5 is a schematic diagram (front view) of the connection between the lifting device and the protective component in the cutter head protection assembly provided in the embodiments of this disclosure;

[0016] Figure 6 is one of the structural schematic diagrams of the cutter head protection assembly provided in the embodiments of this disclosure;

[0017] Figure 7 is one of the schematic diagrams of the auxiliary moving component structure of the cutter head protection assembly provided in the embodiments of this disclosure (right view perspective);

[0018] Figure 8 is one of the schematic diagrams of the auxiliary moving component structure of the cutter head protection assembly provided in the embodiments of this disclosure;

[0019] Figure 9 is a schematic diagram of one of the auxiliary moving component structures of the cutter head protection assembly provided in this embodiment (right view).

[0020] Figure 10 is one of the schematic diagrams of the auxiliary moving component structure of the cutter head protection assembly provided in the embodiments of this disclosure;

[0021] Figure 11 is one of the schematic diagrams of the auxiliary moving component structure of the cutter head protection assembly provided in the embodiments of this disclosure (right view perspective);

[0022] Figure 12 is one of the structural schematic diagrams of the cutter head protection assembly provided in the embodiments of this disclosure.

[0023] Reference numerals: 1-Cutter head protection assembly; 11-Body; 12-Protective component; 121-Protective end; 13-Lifting device; 131-Drive component; 132-Moving component; 133-Elastic component; 14-Guide component; 15-Guide section; 16-Auxiliary moving assembly; 161-Chain belt; 162-Rolling component; 1621-Roller; 2-Lawn mower; 3-Cutter head; X-Lawn mower's direction of travel; A-Preset spacing; S-Cutter head cutting plane; D-Landing surface. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the specific technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings of the embodiments of this disclosure. The following embodiments are used to illustrate this disclosure, but are not intended to limit the scope of this disclosure.

[0025] In the embodiments of this disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0026] Furthermore, in the embodiments of this disclosure, directional terms such as "up," "down," "left," and "right" are defined relative to the orientation in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation in which the components are placed in the accompanying drawings.

[0027] In the embodiments disclosed herein, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0028] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0029] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] Lawn mowers have a wide range of applications, including home gardens, parks, golf courses, and various lawn maintenance sites. When lawns grow too lush and affect aesthetics and daily activities, lawn mowers use a rotating blade to cut the lawn, providing efficient lawn maintenance. However, the high-speed rotating blade not only cuts plants but also poses potential safety hazards.

[0031] Insufficient protection of the blades when they extend from the lawnmower to cut the edge of the lawn increases the risk of user injury. To protect users from accidental contact with the cutting mechanism, industry regulations require effective protection of the cutting mechanism to prevent hands, feet, and other objects from entering.

[0032] In related technologies, there is a lack of protection for the cutter head. Retracting the cutter head as much as possible into the robot's shell and reducing the number of times the cutter head extends out during operation can reduce the safety risks caused by the exposed cutter head. However, this may result in grass with a certain width at the edge of the lawn not being cut effectively, requiring manual cutting, which leads to poor cutting results at the lawn edge.

[0033] Referring to Figure 1, this embodiment of the present disclosure provides a lawnmower 2, which includes a support, a blade disc 3 and a blade disc protection assembly 1. The blade disc 3 is connected to the support; the blade disc protection assembly 1 is disposed between the blade disc 3 and the support.

[0034] In this embodiment, the bracket is configured to support the lawnmower 2 and provide a mounting base for the blade disc 3 and the blade disc protection assembly 1. The blade disc 3 is rotatable relative to the lawnmower 2. The blade disc 3 is equipped with cutting components capable of cutting plants. The cutting components can be blades, grass trimming ropes, etc. As the blade disc 3 rotates at high speed, the cutting components can cut the plants.

[0035] In this embodiment, the blade disc 3 can be raised and lowered relative to the lawnmower 2, thereby adjusting the height at which the blade disc 3 cuts the plants. For example, the lawnmower 2 is equipped with a drive motor capable of driving the blade disc 3 to rise and fall. The drive motor is connected to a bracket, and its output end is connected to the blade disc 3, thereby driving the blade disc 3 to move axially along its axis.

[0036] In this embodiment of the present disclosure, the cutter head protection component 1 can protect the cutter head 3. The cutter head protection component 1 is disposed between the cutter head 3 and the support. The cutter head protection component 1 can be connected to the support or to the motor that drives the cutter head 3 to rotate, etc. The present disclosure does not limit this.

[0037] In this embodiment, the lawnmower 2 may further include a mowing motor, a walking motor, a control system, casters, and other structures. The lawnmower 2 provided in this disclosure includes, but is not limited to, a household lawnmower 2, a commercial lawnmower 2, and an agricultural lawnmower 2.

[0038] Referring to Figure 2, this embodiment of the present disclosure provides a blade disc protection assembly 1, which is detachably connected to a lawnmower 2 and can protect the blade disc 3 of the lawnmower 2. The blade disc protection assembly 1 includes a protective member 12, which is connected to the body 11 and located on the periphery of the blade disc 3; the extension surface of the protective member 12 has an angle with the cutting plane of the blade disc 3, and the protective member 12 extends along the traveling direction of the lawnmower 2; along the axial direction of the blade disc 3, the side of the protective member 12 away from the body 11 includes a protective end 121, and the protective end 121 has a preset distance A between it and the landing surface D of the lawnmower 2. The protective member 12 can shield the blade disc 3 and prevent unintended objects from contacting or approaching the blade disc 3.

[0039] In this embodiment, the blade guard assembly 1 is connected to the lawnmower 2 via a body 11. The body 11 can be a flat plate, curved surface, mesh, fence, rod, or other structure. When the body 11 is a plate-like structure, it can be either flat or curved, and its shape can be adjusted according to the structural shape between the lawnmower 2 and the blade 3. For example, the body 11 is a flat plate structure, covering the side of the blade 3 near the support, thus shielding the upper surface of the blade 3. The body 11 connects the guard 12 to the lawnmower and also protects the lawnmower 2 and the blade 3, reducing the entry of grass clippings, dust, and other debris into the blade 3 during cutting operations, thus preventing problems such as jamming or damage to the blade 3. It also reduces the entry of grass clippings, dust, and other debris into the lawnmower 2, preventing damage to internal structural or functional components such as the motor and axles.

[0040] In this embodiment, the protective member 12 is located on the periphery of the cutter head 3, providing protection for the cutter head 3. The extended surface of the protective member 12 refers to the surface formed by all surfaces of the protective member 12 extending outwards. The shape and size of the extended surface can be adjusted according to the shape and size of the protective member 12. For example, the extended surface can be a plane, a curved surface, a mesh structure, or a fence structure, etc. The cutting plane of the cutter head 3 refers to the plane on which the cutting element rotates and cuts when the cutter head 3 rotates. An angle exists between the extended surface of the protective member 12 and the cutting plane of the cutter head 3.

[0041] In some embodiments, referring to FIG3, the angle between the extended surface of the protective member 12 and the cutting plane of the cutter head 3 can be adjusted as needed, and can be 30 degrees, 60 degrees, etc. For example, in the embodiment provided in this disclosure, the angle between the extended surface of the protective member 12 and the cutting plane of the cutter head 3 is 90 degrees.

[0042] In this embodiment, the protective member 12 can be rotatably connected to the body 11, allowing the protective member 12 to rotate around the body 11. The protective member 12 can rotate relative to the body 11 to different first and second angles. When the lawnmower 2 requires protection, the protective member 12 rotates relative to the body 11 to the first angle, at which point the protective member 12 can protect the blade disc 3. When the lawnmower 2 does not require protection (or has low protection requirements), the protective member 12 rotates relative to the body 11 to the second angle, at which point the protective member 12 can be retracted relative to the body 11 to reduce the volume of the blade disc protection assembly 1.

[0043] For example, the protective member 12 may rotate to a first angle relative to the body 11 when the blade disc 3 is installed in the lawnmower 2 and extends out of the lawnmower 2's housing. In this case, the blades on the blade disc 3 may be exposed, increasing the protection requirement for the lawnmower 2. The protective member 12 can rotate to a first angle relative to the body 11 (e.g., 90 degrees, 100 degrees, etc.), and the protective member 12 can protect the outer periphery of the blade disc 3. The protective member 12 may rotate to a second angle relative to the body 11 when the blade disc 3 is retracted relative to the lawnmower 2. The blade disc 3 is located inside the lawnmower 2's housing, and the lawnmower 2's housing can protect the blade disc 3. Therefore, the protection requirement for the lawnmower 2 is reduced, and the protective member 12 can rotate to a second angle relative to the body 11 (e.g., 15 degrees, 20 degrees, etc.). The protective member 12 can be closer to the body 11, reducing the volume of the blade disc protection assembly 1 and facilitating storage.

[0044] In another embodiment, the protective member 12 may also be provided to extend around the circumference of the cutter head 3, which can improve the protection effect on the periphery of the cutter head 3. The protective member 12 may also be provided to extend in an arc shape, protecting a part of the circumference of the cutter head 3, or protecting any area of ​​the circumference.

[0045] In this embodiment of the disclosure, the landing surface D of the lawnmower 2 can be understood as the part of the lawnmower 2 that contacts the ground during operation. The landing surface D of the lawnmower 2 directly contacts the lawn or ground when the lawnmower 2 is running. The landing surface D may include the chassis of the lawnmower 2, the blade holder, the wheel system, or other components that contact the ground.

[0046] In this embodiment, a preset distance A exists between the protective end 121 and the landing surface D of the lawnmower 2. This preset distance A limits the distance between the protective end 121 and the landing surface D of the lawnmower 2. The preset distance A allows objects that need to be cut, such as plants, to enter between the protective end 121 and the landing surface D of the lawnmower 2, but also prevents objects larger than the preset distance A from entering between them. Unintended objects can be understood as non-target objects during the cutting operation, such as the user's fingers or toes. In this embodiment, the blade guard assembly 1 is detachably connected to the lawnmower 2. The blade guard assembly 1 can be directly connected to the lawnmower 2 or connected to the lawnmower 2 through other components. Similarly, the protective component 12 can be directly connected to the lawnmower 2 or connected to the lawnmower 2 through other components. When the blade guard assembly 1 is directly connected to the lawnmower 2, it can be connected by bolts, clips, etc.; when the blade guard assembly 1 is connected to the lawnmower 2 through other components, lifting structures, rotating shafts, and other components can be connected between the blade guard assembly 1 and the lawnmower 2.

[0047] The blade disc protection assembly 1 of the application embodiment is connected to the lawnmower 2 via a body 11. A protective member 12 is connected to the body 11 and located on the periphery of the blade disc 3. The protective member 12 can protect the blade disc 3 from the periphery. Since there is an angle between the extended surface of the protective member 12 and the cutting plane of the blade disc 3, when the protective member 12 is located in the area of ​​the cutting plane of the blade disc 3, it can block the plane formed by the cutting of the blade disc 3, thus blocking the cutting material and achieving the effect of protecting the blade disc 3, reducing the risk of the user being cut. Because there is a preset distance A between the protective end 121 and the landing surface D of the lawnmower 2 along the axial direction of the blade disc 3, the preset distance A allows objects that need to be cut, such as plants, to enter between the protective end 121 and the landing surface D of the lawnmower 2, while also preventing objects larger than the preset distance A from entering between the protective end 121 and the landing surface D of the lawnmower 2. This improves the protective effect of the protective member 12 on the blade disc 3 and reduces the risk of accidental injury to the user. Because the cutter head 3 is equipped with a protective component 12, the cutter head 3 can be positioned closer to the edge of the lawnmower 2, or the cutter head 3 can extend outside the lawnmower 2. When the lawnmower 2 is working, less grass is left at the edge of the lawn, resulting in a better mowing effect. Therefore, the cutter head protection component 1 provided in this disclosure can improve the protection effect of the cutter head 3, reduce the risk of accidental injury to the user, and improve the mowing effect.

[0048] In some possible embodiments of this disclosure, the blade disc 3 has a first position and a second position relative to the lawnmower 2. When the blade disc 3 is in the first position, the preset distance A is less than or equal to 12 mm; when the blade disc 3 is in the second position, the preset distance A is greater than or equal to 15 mm. In the first position, along the axial direction of the blade disc 3, the projection of the blade disc 3 and the projection of the lawnmower 2 do not overlap at least partially; in the second position, the projection of the blade disc 3 and the projection of the lawnmower 2 completely overlap.

[0049] In this embodiment, when the blade disc 3 is in the first position, the projection of the blade disc 3 and the projection of the lawnmower 2 do not overlap at least partially. This can be understood as a portion of the blade disc 3 extending beyond the outline of the lawnmower 2, essentially extending beyond the range of the lawnmower 2's body for cutting. In this case, the blade disc 3 is no longer shielded by the lawnmower 2, increasing the risk of cutting safety hazards and thus increasing the need for protection for the blade disc 3. In this situation, the preset gap A can be less than or equal to 12mm (the width of an adult's finger is approximately greater than or equal to 12mm), reducing the likelihood of the user's fingers or feet entering the preset gap and improving the protective effect.

[0050] In this embodiment, when the blade disc 3 is in the second position, its projection completely overlaps with the projection of the lawnmower 2. This can be understood as the blade disc 3 being obscured by the lawnmower 2 body, thus reducing the need for protection. In this case, the preset distance A can be greater than or equal to 15mm, reducing friction between the protective component 12 and the landing surface D, or collisions between the protective component 12 and other debris, thereby improving the lawnmower 2's passability.

[0051] In this embodiment, there is a space between the side of the cutter head 3 away from the landing surface D and the protective member 12 or the body 11. To reduce the accumulation of debris such as grass clippings in this space during the cutting process, the distance between the blade and the protective member 12 can be greater than or equal to 5 cm, or the distance between the blade and the inner wall of the body 11 near the blade side can be greater than or equal to 5 cm, or the distance between the outer periphery of the cutter head 3 and the protective member 12 or the body 11 can be greater than or equal to 5 cm. With this structure, debris such as grass clippings can fall out through the 5 cm gap, reducing the accumulation of too much debris in the cutter head 3, which could cause the cutter head 3 to jam and be damaged. For example, the distance between the blade and the landing surface D can be 7 cm, the distance between the blade and the inner surface of the protective member 12 facing the blade side is 5 cm, and the distance between the protective member 12 and the landing surface D is less than or equal to 45 mm; alternatively, the distance between the blade and the landing surface D can be 5 cm, the distance between the blade and the inner surface of the protective member 12 facing the blade side is 5 cm, and the distance between the protective member 12 and the landing surface D is less than or equal to 26 mm.

[0052] In this embodiment, the lawnmower 2 may be equipped with a manual adjustment device, such as a knob, handle, or bolt, which allows the user to manually adjust the height of the protective member 12, thereby changing the preset spacing A. The lawnmower 2 may also be equipped with a sensor and control system that automatically adjusts the height of the protective member 12 based on the monitored distance between the blade disc 3 and the ground or other objects, and according to a preset value.

[0053] In this embodiment of the disclosure, after multiple tests and verifications, a preset spacing A of less than or equal to 12mm can reduce unnecessary friction or collision between the protective component 12 and the landing surface D, while simultaneously increasing the safe distance of the protective component 12 to prevent unintended objects from contacting or approaching the cutter head 3.

[0054] The blade guard assembly 1 of this embodiment can adjust the preset spacing A to different sizes when the blade 3 is in different positions, that is, when the blade 3 is in different needs. This allows for flexible adjustment of the protective effect of the guard 12 on the blade 3 in different working environments, or improvement of the passability of the lawnmower 2 during operation, so as to adapt to different operating needs of the lawnmower 2.

[0055] Referring to Figures 4 and 5, in some possible embodiments of this disclosure, the blade guard assembly 1 further includes a lifting device 13 and a body 11, with the guard 12 connected to the body 11; the lifting device 13 connects the body 11 to the lawnmower 2, and the lifting device 13 can move along the axial direction of the blade 3 to drive the body 11 to move along the axial direction of the blade 3; or, the lifting device 13 connects the body 11 to the guard 12, and the lifting device 13 can move along the axial direction of the blade 3 to drive the guard 12 to move along the axial direction of the blade 3.

[0056] In this embodiment, the protective component 12 and the main body 11 can be integrally formed or separately configured, depending on the requirements. For example, the main body 11 of the cutter head protective assembly 1 can be made of high-strength plastic or metal, resulting in a robust and durable structure. The protective component 12 can be made of wear-resistant rubber or plastic to increase its impact resistance and service life. The main body 11 and the protective component 12 can be connected by screws or clips for easy installation and disassembly by the user.

[0057] Based on this, when the main body 11 and the protective component 12 are an integral structure, the lifting device 13 can connect the main body 11 and the lawnmower 2. The lifting device 13 drives the main body 11 to move along the axial direction of the cutter head 3, which can adjust the distance between the protective component 12 and the landing surface D of the lawnmower 2, thereby adjusting the protective effect of the protective component 12 on the cutter head 3. When the main body 11 and the protective component 12 are separate structures, the lifting device 13 can connect the main body 11 and the protective component 12. The lifting device 13 drives the protective component 12 to move along the axial direction of the cutter head 3, which can adjust the distance between the protective component 12 and the landing surface D of the lawnmower 2, thereby adjusting the protective effect of the protective component 12 on the cutter head 3.

[0058] In this embodiment, the body 11 or the protective component 12 can actively lift and lower relative to the cutter head 3. When the body 11 or the protective component 12 actively lifts and lowers relative to the cutter head 3, the lifting device 13 can be a screw lifting mechanism, a hydraulic lifting mechanism, a pneumatic lifting mechanism, etc. For example, a pneumatic lifting mechanism typically includes components such as a compressor, a cylinder, a valve, and an air pipe. The body 11 or the protective component 12 can be connected to the piston rod of the cylinder via a connector. The compressor can be connected to the lawnmower 2. After the compressor starts, it sends air pressure into the cylinder, pushing the piston rod to move, thereby realizing the lifting and lowering of the body 11 or the protective component 12. The height of the body 11 or the protective component 12 can be precisely adjusted through the lifting device 13, so that the body 11 or the protective component 12 can provide effective protection for the cutter head 3 at different mowing heights.

[0059] In this embodiment of the present disclosure, the lifting device 13 can maintain the distance between the protective end 121 of the protective member 12 and the landing surface D at a preset distance A. A sensing device can be provided on the protective member 12. The sensing device can sense the distance between the protective end 121 and the landing surface D. When the distance between the protective end 121 and the landing surface D is detected to be less than the preset distance A, the lifting device 13 moves the protective member 12 away from the landing surface D to maintain the preset distance A. When the distance between the protective end 121 and the landing surface D is detected to be greater than the preset distance A, the lifting device 13 moves the protective member 12 closer to the landing surface D to maintain the preset distance A.

[0060] In this embodiment, the body 11 or the protective member 12 can be passively raised and lowered relative to the cutter head 3. When the body 11 or the protective member 12 contacts the landing surface D (such as the ground) and encounters an obstacle, the protective member 12 or the body 11 will be subjected to a force away from the landing surface D due to the obstacle, causing the protective member 12 or the body 11 to move towards the side away from the landing surface D (that is, to rise relative to the landing surface D), thereby reducing the risk of collision or damage with the obstacle. After the lawnmower 2 passes the obstacle, the protective member 12 or the body 11 can move towards the landing surface D by relying on the lifting device 13 and re-contact the landing surface D to maintain the protective effect of the protective member 12.

[0061] In this embodiment of the disclosure, in order to achieve passive lifting and lowering of the protective member 12, the lifting device 13 can be an elastic connector, such as a spring or elastic rubber pad, provided between the protective member 12 and the body 11. When the protective member 12 encounters an obstacle, these elastic connectors will absorb the impact force and allow the protective member 12 to rise; and when the obstacle is crossed, the elastic connectors will release the stored energy, causing the protective member 12 to press down and re-contact the landing surface D.

[0062] Secondly, in this embodiment, the blade disc 3 and the protective assembly can be equipped with only one lifting device 13. The axial movement of the lifting device 13 drives the entire blade disc 3 and protective assembly to rise and fall together. This simplifies the structure of the lawnmower 2, reduces costs, and keeps the height between the blade disc 3 and the protective assembly 12 relatively fixed. However, to further enhance flexibility and adaptability, this disclosure also provides another preferred solution: the blade disc 3 and the blade disc protective assembly 1 can be raised and lowered separately relative to the lawnmower 2. This allows the user to adjust the height of either the blade disc 3 or the blade disc protective assembly 1 individually according to actual needs, thereby meeting the requirements of different mowing scenarios.

[0063] Referring to Figures 4 and 5, in some possible embodiments of this disclosure, the lifting device 13 includes a driving member 131 and a moving member 132. The moving member 132 is connected to the body 11, and the driving member 131 is disposed on the lawnmower 2. The driving member 131 can drive the moving member 132 to move along the axial direction of the cutter head 3.

[0064] In this embodiment, the driving component 131 may include a motor, hydraulic motor, pneumatic cylinder, or lead screw driver, etc. These driving components 131 convert electrical energy, hydraulic energy, or pneumatic energy into mechanical energy, thereby driving the moving component 132 to move. The moving component 132 may adopt a structure such as a slide rail, connecting rod, chain, belt, or lead screw nut, and the moving component 132 can convert the driving force of the driving component 131 into the movement of the body 11 or the protective component 12 along the axial direction of the cutter head 3.

[0065] For example, the drive component 131 can be an electric push rod, and the moving component 132 can be a screw and nut mechanism. The electric push rod is fixed to the body 11 of the lawnmower 2. The telescopic end of the electric push rod faces the body 11 or the protective component 12 that needs to be raised or lowered. The screw and nut mechanism consists of a screw and a nut. The nut is connected to the body 11 or the protective component 12, and the screw is connected to the telescopic end of the electric push rod. The telescopic end of the electric push rod is connected to one end of the screw (such as by bolting, welding, etc.). The body 11 or the protective component 12 is connected to the nut of the screw and nut mechanism. The body 11 or the protective component 12 can be raised or lowered together with the nut.

[0066] In this embodiment of the blade guard assembly 1, the drive member 131 drives the body 11 or the guard member 12 to move, which helps to improve mowing efficiency. The drive member 131 may be a component that is easy to replace and maintain, while the moving member 132 may be made of a wear-resistant and easy-to-clean material, thereby making the blade guard assembly 1 easy to maintain.

[0067] Referring to Figures 4 or 5, in some possible embodiments of this disclosure, the lifting device 13 includes an elastic element 133 disposed between the body 11 and the lawnmower 2, or the elastic element 133 disposed between the protective member 12 and the lawnmower 2; the elastic element 133 can deform at least in the axial direction of the cutter head 3, and along the axial direction of the cutter head 3, the elastic element 133 can at least apply an elastic force toward the landing surface D to the body 11.

[0068] In this embodiment of the disclosure, the elastic element 133 can be a spring, a damper, an elastic rubber pad, etc. For example, the elastic element 133 can be a spring. The spring can automatically adjust the extension and contraction length of the spring according to the pressure change. With the help of the weight of the protective element 12 itself or the tension of the mechanical spring, the body 11 or the protective element 12 can remain in contact with the ground by gravity or the elastic force applied by the spring towards the landing surface D when the cutter head 3 is at different heights.

[0069] In this embodiment of the present disclosure, when the lawnmower 2 is in operation, the protective end 121 of the protective member 12 is in contact with the landing surface D. As the terrain of the landing surface D changes, the elastic member 133 contracts toward the side away from the landing surface D or the elastic force toward the side of the landing surface D can keep the protective end 121 of the protective member 12 in continuous contact with the landing surface D, thereby reducing the weakening of the protective effect of the protective member 12 due to the change in the terrain of the landing surface D.

[0070] The blade guard assembly 1 of this embodiment, with its elastic element 133, helps improve the adaptability of the lawnmower 2. Whether on flat or rugged terrain, the lawnmower 2 can maintain a tight fit between the blade guard assembly 1 and the ground through the automatic adjustment function of the elastic element 133, thus enhancing its protective effect. Simultaneously, the effective cushioning effect of the elastic element 133 reduces vibration and impact during mowing, improving the overall stability and durability of the machine.

[0071] In some possible embodiments of this disclosure, the blade guard assembly 1 further includes a guide 14, one end of which is connected to the lawnmower 2, and the extension direction of the guide 14 is parallel to the axial direction of the blade 3; the body 11 includes a guide portion 15, which is movably disposed on the guide 14, and the body 11 can move along the guide 14 under the drive of the lifting device 13; or, the guard 12 includes a guide portion 15, which is movably disposed on the guide 14, and the guard 12 can move along the guide 14 under the drive of the lifting device 13.

[0072] In this embodiment, the extension direction of the guide member 14 is parallel to the axial direction of the cutter head 3. This means that the body 11 or the protective member 12 can move linearly along the guide member 14 under the drive of the lifting device 13, thereby achieving height adjustment of the body 11 or the protective member 12 in the axial direction of the cutter head 3. The guide member 14 and the guide part 15 cooperate to improve the stability of the body 11 or the protective member 12 during the lifting process.

[0073] In this embodiment of the present disclosure, a guide portion 15 is provided on the body 11 or the protective member 12. The guide portion 15 may be other components provided on the body 11 or the protective member 12, or it may be a structure on the body 11 or the protective member 12 that is adapted to the guide member 14.

[0074] For example, the guide 14 can be a long strip slide rail, and the guide part 15 of the body 11 or the protective part 12 is designed as a slider that matches the slide rail. The slider can be equipped with rolling bearings or sliding bearings to reduce frictional resistance during movement.

[0075] In another embodiment, referring to FIG6, the body 11 includes a guide portion 15, which is configured as a through hole. The guide member 14 is a columnar structure extending axially along the blade disc 3. One end of the guide member 14 is connected to the lawnmower 2, and the other end passes through the guide through hole. The body 11 can move along the guide member 14 under the drive of the lifting device 13. In another embodiment, the protective member 12 includes a guide through hole. One end of the guide member 14 is connected to the lawnmower 2, and the other end passes through the guide through hole. The protective member 12 can move along the guide member 14 under the drive of the lifting device 13.

[0076] Referring to Figures 7 and 8, in some possible embodiments of this disclosure, the blade guard assembly 1 further includes an auxiliary moving assembly 16, at least a portion of which is rotatably connected to the guard 12. The auxiliary moving assembly 16 has a first state and a second state relative to the lawnmower 2. In the first state, there is a preset gap between the auxiliary moving assembly 16 and the landing surface D, and the auxiliary moving assembly 16 shields the blade 3 and prevents unintended objects from contacting or approaching the blade 3. In the second state, the auxiliary moving assembly 16 can abut against the landing surface D, and when the lawnmower 2 is moving, it can drive the auxiliary moving assembly 16 to rotate relative to the guard 12.

[0077] In this embodiment, the auxiliary moving component 16 can provide additional functions. After the auxiliary moving component 16 is connected to the cutterhead protection component 1, it can be understood that the auxiliary moving component 16 can function like the cutterhead protection component 1, or be equivalent to the protective component 12, and provide a protective effect. At this time, the side of the auxiliary moving component 16 that abuts against the landing surface D can be regarded as the protective end 121. The auxiliary moving component 16 can be raised to have a preset gap with the landing surface D, which can be understood as having the same effect as having a preset gap between the cutterhead protection component 1 and the landing surface D.

[0078] It should be added that if there are gaps or gaps between or in any part of the auxiliary moving component 16, in order to enhance the protective function of the auxiliary moving component 16, these gaps or gaps shall be less than or equal to a preset gap A. For example, the preset gap A may be 15mm, 14mm, 13mm or 12mm, etc.

[0079] In this embodiment, the auxiliary moving component 16 has two different operating states. In the first state, there is a preset gap between the auxiliary moving component 16 and the landing surface D (such as the ground, lawn, etc.). This gap allows the auxiliary moving component 16 to shield the blade disc 3 while preventing unintended objects (such as hands, feet, stones, etc.) from contacting or approaching the blade disc 3, thereby increasing safety. In the second state, the auxiliary moving component 16 is in direct contact with the landing surface D. In this state, if the lawnmower 2 is moving, the momentum of the lawnmower 2 will cause the auxiliary moving component 16 to rotate relative to the protective member 12, thereby reducing the frictional force between the auxiliary moving component 16 or the protective end 121 and the landing surface D.

[0080] In addition, when the lawnmower 2 is working on an uneven landing surface D, the auxiliary moving component 16 comes into contact with the landing surface D and can rotate relative to the landing surface D, which can also help the lawnmower 2 maintain balance and stability.

[0081] Referring to Figures 7 and 8, in some possible embodiments of this disclosure, the auxiliary movement component 16 includes a chain 161 and a rolling element 162. The rolling element 162 is rotatably connected to the protective element 12. The chain 161 is disposed on the periphery of the rolling element 162. The chain 161 can abut against the landing surface D and can rotate relative to the protective element 12 under the constraint of the rolling element 162.

[0082] In this embodiment, the outer peripheral surface of the chain belt 161 abuts against the landing surface D, providing additional grip or direct contact with the landing surface D (such as the ground, ramp, etc.). When the lawnmower 2 is moving, the momentum of its movement causes the chain belt 161 to rotate relative to the landing surface D. The rotation of the rolling element 162 causes the chain belt 161 to move along a specific path, thereby effectively reducing the friction between the auxiliary moving component 16 and the landing surface D.

[0083] In this embodiment of the disclosure, the chain belt 161 can be a flat belt, V-belt, cylindrical belt, synchronous belt, track, chain, or other transmission mechanism; the rolling element 162 can be a flat pulley, V-belt pulley, synchronous pulley, track pulley, sprocket, or other variant simple mechanism used with the chain belt 161, such as a bearing, plastic bushing, or other rotating mechanism.

[0084] For example, the chain 161 is a track, the rolling element 162 is a pulley, the track is arranged around the outer surface of the pulley, there are at least two pulleys, the two pulleys are arranged at both ends of the protective element 12, the track is sleeved on the circumferential surface of the two pulleys, and the outer surface of the track can abut against the landing surface D.

[0085] The blade guard assembly 1 of this disclosure provides additional grip through the contact between the chain 161 and the landing surface D, which helps the lawnmower 2 move stably on various terrains. The rotation of the rolling element 162 helps the lawnmower 2 traverse uneven surfaces or obstacles to adapt to different movement needs and terrain changes.

[0086] Referring to Figures 9 and 10, in some possible embodiments of this disclosure, the auxiliary movement component 16 includes a rolling element 162, which is rotatably connected to the protective element 12, and the peripheral surface of the rolling element 162 can abut against the landing surface D.

[0087] In this embodiment, the rolling element 162 can be a roller 1621, a ball bearing, a roller bearing, etc. For example, multiple rollers 1621 can be provided at the protective end 121, and the multiple rollers 1621 are arranged along the extension direction of the protective end 121. When the lawnmower 2 moves forward to mow the grass, the rollers 1621 roll on the landing surface D, which can greatly reduce the friction between the protective element 12 or the auxiliary moving component 16 and the ground.

[0088] In the blade guard assembly 1 of this embodiment, the rolling element 162 changes the contact between the auxiliary moving assembly 16 and the landing surface D from sliding friction to rolling friction, which reduces the resistance during the movement of the lawnmower 2. This helps the equipment or machine consume less energy during movement and improves overall efficiency.

[0089] Referring to Figures 9 and 10, in some possible embodiments of this disclosure, there are multiple rolling elements 162 arranged sequentially along the traveling direction of the lawnmower 2, and the gap between two adjacent rolling elements 162 is less than or equal to a preset spacing A.

[0090] In this embodiment, there can be multiple rollers 1621, and the interval between the multiple rollers 1621 is less than or equal to a preset distance A, which can prevent unintended objects from entering between the rollers 1621 and effectively protect the user's safety.

[0091] In another embodiment, referring to FIG11, the number of rollers 1621 can also be two or three, etc. In this case, the arrangement of rollers 1621 on the protective end 121 can satisfy the interval being less than or equal to the preset distance A, or the protective end 121 between rollers 1621 can still maintain a distance from the landing surface D that is less than or equal to the preset distance A; or, when there are two rollers 1621, one roller 1621 is provided at each end of the protective end 121, and the protective end 121 between the two rollers 1621 maintains a preset gap from the landing surface D.

[0092] Referring to FIG12, in some possible embodiments of this disclosure, the blade guard assembly 1 includes at least two guard members 12 disposed opposite to each other, the two guard members 12 being disposed on opposite sides of the blade 3 along a direction perpendicular to the travel direction of the lawnmower 2.

[0093] In this embodiment, along the direction of travel perpendicular to the lawnmower 2, two protective components 12 are respectively disposed on opposite sides of the cutter head 3. The two cutter head protection components 1 can protect the cutter head 3 on both sides of the direction of travel of the lawnmower 2, thereby improving the protection effect and safety.

[0094] In another embodiment, a greater number of protective elements 12 may be added, such as multiple protective elements 12 evenly distributed along the circumference of the cutter head 3, to provide more comprehensive protection.

[0095] In this embodiment of the disclosure, the shape and size of the protective component 12 can be adjusted according to the application scenario and operational requirements of the lawnmower 2. For example, for a lawnmower 2 that needs to frequently pass through narrow spaces, a more compact and flexible protective component 12 can be used.

[0096] In some possible embodiments of this disclosure, the body 11 and the protective element 12 are an integral structure.

[0097] In this embodiment, materials with sufficient strength and durability can be selected to manufacture the body 11 and the protective component 12. The manufacturing process of the integral structure can employ techniques such as injection molding, casting, forging, or 3D printing to simultaneously manufacture the body 11 and the protective component 12.

[0098] The cutter head protection assembly 1 of this disclosure improves the strength and stability of the overall structure: since the body 11 and the protective component 12 are an integral structure, the detachment of the body 11 and the protective component 12 due to loosening or damage of the connecting parts is effectively reduced, thereby improving the strength and stability of the overall structure. The integral structure of the body 11 and the protective component 12 also simplifies the manufacturing and assembly process and reduces production costs.

[0099] The sequence numbers of the embodiments disclosed above are for descriptive purposes and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this disclosure and do not limit the patent scope of this disclosure. Any equivalent structural or procedural transformations made based on the content of this disclosure and its drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this disclosure. Industrial applicability

[0100] This disclosure provides a blade disc protection assembly and a lawnmower. The blade disc protection assembly includes a protective member connected to the lawnmower and located around the blade disc. The extended surface of the protective member forms an angle with the cutting plane of the blade disc, and the protective member extends along the travel direction of the lawnmower. Along the axial direction of the blade disc, the side of the protective member away from the lawnmower includes a protective end, and the protective end has a predetermined distance from the landing surface of the lawnmower. The protective member shields the blade disc and prevents unintended objects from contacting or approaching it. This solution improves the protection of the blade disc, reduces the risk of accidental injury to the user, and improves the mowing effect.

Claims

1. A blade guard assembly, detachably connected to a lawnmower and configured to protect the blade of the lawnmower, comprising: A protective component is attached to the lawnmower and located around the blade disc; The protective component has an angle between its extended surface and the cutting plane of the blade disc, and the protective component extends along the travel direction of the lawnmower. Along the axial direction of the cutter head, the protective member includes a protective end on the side away from the lawnmower. The protective end has a preset distance from the landing surface of the lawnmower. The protective member can shield the cutter head and prevent unintended objects from contacting or approaching the cutter head.

2. The cutter head protection assembly according to claim 1, wherein, The blade disc has a first position and a second position relative to the lawnmower. When the blade disc is in the first position, the preset distance is less than or equal to 12mm. In the first position, along the axial direction of the cutter head, the projection of the cutter head and the projection of the lawnmower do not overlap at least partially; in the second position, the projection of the cutter head and the projection of the lawnmower completely overlap.

3. The cutter head protection assembly according to claim 2, wherein, When the cutter head is in the second position, the preset spacing is greater than or equal to 15mm.

4. The cutter head protection assembly according to any one of claims 1 to 3, wherein, It also includes a lifting device and a body, with the protective component connected to the body; the lifting device connects the body to the lawnmower, and the lifting device can move along the axial direction of the blade disc and drive the body to move along the axial direction of the blade disc; Alternatively, the lifting device connects the body to the protective member, and the lifting device can move along the axial direction of the cutter head, and drive the protective member to move along the axial direction of the cutter head.

5. The cutter head protection assembly according to claim 4, wherein, The lifting device includes a driving component and a moving component. The moving component is connected to the main body, and the driving component is disposed on the lawnmower. The driving component can drive the moving component to move along the axial direction of the blade disc.

6. The cutter head protection assembly according to claim 4 or 5, wherein, The lifting device includes an elastic element disposed between the body and the lawnmower; or, the elastic element is disposed between the protective member and the lawnmower; the elastic element can deform at least in the axial direction of the blade disc, and along the axial direction of the blade disc, the elastic element can apply an elastic force toward the landing surface to the body.

7. The cutter head protection assembly according to any one of claims 4 to 6, wherein, It also includes a guide member, one end of which is connected to the lawnmower, and the extension direction of the guide member is parallel to the axial direction of the cutter head; The main body includes a guide portion, which is movably disposed on the guide member, and the main body can move along the guide member under the drive of the lifting device; Alternatively, the protective component may include a guide portion, which is movably disposed on the guide member, and the protective component may move along the guide member under the drive of the lifting device.

8. The cutter head protection assembly according to any one of claims 1 to 7, wherein, It also includes an auxiliary moving component, at least a portion of which is rotatably connected to the protective member; the auxiliary moving component has a first state and a second state relative to the lawnmower; In the first state, there is a preset gap between the auxiliary moving component and the landing surface. The auxiliary moving component can shield the cutter head and prevent unintended objects from contacting or approaching the cutter head. In the second state, the auxiliary moving component can come into contact with the landing surface, and when the lawnmower is moving, it can drive the auxiliary moving component to rotate relative to the protective member.

9. The cutter head protection assembly according to claim 8, wherein, The auxiliary moving component includes a chain and a rolling element. The rolling element is rotatably connected to the protective component. The chain is disposed on the periphery of the rolling element. The chain can abut against the landing surface and can rotate relative to the protective component under the constraint of the rolling element.

10. The cutter head protection assembly according to claim 8, wherein, The auxiliary movement component includes a rolling element that is rotatably connected to the protective element, and the peripheral surface of the rolling element can abut against the landing surface.

11. The cutter head protection assembly according to claim 10, wherein, There are multiple rolling elements arranged sequentially along the traveling direction of the lawnmower, and the gap between two adjacent rolling elements is less than or equal to the preset spacing.

12. The cutter head protection assembly according to any one of claims 1 to 11, wherein, It includes at least two protective members arranged opposite each other, the two protective members being respectively arranged on opposite sides of the cutter head along a direction perpendicular to the travel direction of the lawnmower.

13. The cutter head protection assembly according to any one of claims 4 to 7, wherein, The main body and the protective component are an integral structure.

14. A lawnmower, wherein, include: support; The cutter head is connected to the bracket; The cutter head protection assembly according to any one of claims 1 to 13, wherein the cutter head protection assembly is disposed between the cutter head and the bracket.

Images