Lawn mower

Abstract

The utility model discloses a mower relates to garden machinery technical field, wherein, the mower includes bottom wall and cutting assembly, and bottom wall is provided with via hole, cutting assembly includes cutter head and cutter head drive part, cutter head drive part is installed in bottom wall, and has drive shaft, drive shaft is worn in via hole, and is connected with cutter head, and cutter head is equipped with a plurality of blades along its periphery, wherein, bottom wall and / or cutter head is equipped with annular protection structure to prevent sundries from entering between bottom wall and cutter head, the utility model provides technical scheme can improve the operation efficiency of mower.

Description

Technical Field

[0001] This utility model relates to the field of garden machinery technology, and in particular to a lawn mower. Background Technology

[0002] In existing lawnmowers, the blade disc is typically used for cutting and shredding, while the blade disc drive shaft is responsible for transmitting power to the blade disc so that it can rotate normally to complete the work. However, existing lawnmowers are prone to situations where weeds are located above the blade disc or even entangled in the blade disc drive shaft, which hinders the normal rotation of the blade disc and seriously affects the normal operation of the lawnmower. Utility Model Content

[0003] The main purpose of this utility model is to propose a lawnmower that aims to improve the operating efficiency of lawnmowers.

[0004] To achieve the above objectives, the lawnmower proposed in this utility model includes:

[0005] The bottom wall has through holes;

[0006] A cutting assembly includes a cutter head and a cutter head drive component. The cutter head drive component is mounted on the bottom wall and has a drive shaft. The drive shaft passes through the through hole and is connected to the cutter head. The cutter head is provided with a plurality of blades along its circumference.

[0007] The bottom wall and / or the cutter head are provided with an annular protective structure to prevent debris from entering between the bottom wall and the cutter head.

[0008] In one embodiment, the lawnmower further includes a drive cylinder, the bottom wall of which is formed on the drive cylinder.

[0009] In one embodiment, the annular protective structure includes a first protective ring, which is fixed to the lower side of the drive cylinder and surrounds the outer side of the cutter head;

[0010] Alternatively, the annular protective structure includes a second protective ring, which is disposed on the upper side of the cutter head and around the outside of the through hole;

[0011] Alternatively, the annular protective structure includes a first protective ring and a second protective ring, with the first protective ring provided on the lower side of the drive cylinder and the second protective ring provided on the upper side of the cutter head, and the first protective ring and the second protective ring being at least partially stacked in their radial direction.

[0012] In one embodiment, when the lawnmower is in operation, the blade extends beyond the periphery of the cutter head, and the maximum cutting diameter formed by the blade is smaller than the outer diameter of the drive cylinder.

[0013] In one embodiment, the lawnmower further includes a plurality of protective covers mounted on the drive cylinder, with at least a portion of the protective covers located outside the cutter head.

[0014] In one embodiment, the protective cover includes a connecting plate and a protective plate, the connecting plate being connected to the drive cylinder, and the protective plate being folded from the outer edge of the connecting plate toward a direction away from the drive cylinder.

[0015] In one embodiment, the outer diameter D1 of the drive cylinder and the outer contour diameter D2 of the connecting plate satisfy: 0≤D2-D1≤20mm.

[0016] In one embodiment, the lawnmower further includes a housing with a lifting opening, and the drive cylinder is vertically and flexibly inserted through the lifting opening via a lifting mechanism.

[0017] In one embodiment, the cylinder sidewall of the drive cylinder includes an inner cylinder sidewall and an outer cylinder sidewall, wherein the hardness of the outer cylinder sidewall is higher than that of the inner cylinder sidewall.

[0018] And / or, the drive cylinder is sealed to the lifting port.

[0019] In one embodiment, a mounting bracket is provided inside the housing;

[0020] The lifting mechanism includes a lifting drive component and a driven component. The lifting drive component is disposed on the mounting bracket and is drivenly connected to the driven component. The driven component is rotatably mounted on the mounting bracket and is drivenly connected to the drive cylinder.

[0021] In the technical solution of this utility model, the drive shaft of the cutter head drive component passes through the through hole in the bottom wall and connects to the cutter head to drive it. An annular protective structure is provided on the bottom wall and / or the cutter head. This annular protective structure surrounds the drive shaft from all sides, while the drive shaft is hidden inside the annular protective structure. Compared to not having an annular protective structure or using protective railings, the annular protective structure can continuously prevent debris from entering between the bottom wall and the cutter head, reliably reducing the possibility of debris such as weeds and vines entering between the bottom wall and the cutter head. This effectively prevents grass accumulation above the cutter head and even hinders the normal rotation of the cutter head, ensuring the cutting efficiency of the cutting components. Simultaneously, it reduces the workload of maintenance and cleaning, thereby improving the operating efficiency of the lawnmower. Attached Figure Description

[0022] 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 the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the lawnmower provided by this utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of a lawnmower after the support frame has been removed;

[0025] Figure 3 for Figure 1 A top view of a lawnmower;

[0026] Figure 4 for Figure 3 A cross-sectional view of a lawnmower cut along section line AA;

[0027] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0028] Figure 6 for Figure 1 A top view of a lawnmower;

[0029] Figure 7 for Figure 6 A cross-sectional view of a lawnmower cut along the BB section line;

[0030] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0031] Figure 9 This is a schematic diagram of the assembly of the drive cylinder and the cutting assembly from one perspective.

[0032] Figure 10 This is a schematic diagram of the assembly of the drive cylinder and the cutting assembly from another perspective.

[0033] Explanation of icon numbers:

[0034] 10. Drive cylinder; 11. Through hole; 12. First protective ring; 131. Inner cylinder side wall; 132. Outer cylinder side wall; 14. External thread; 15. Limiting protrusion;

[0035] 20. Cutting assembly; 21. Cutter head; 211. Second protective ring; 22. Blade; 23. Cutter head drive component; 231. Drive shaft; 24. Protective cover; 241. Connecting plate; 242. Protective plate;

[0036] 30. Housing; 31. Lifting port; 32. Sealing ring;

[0037] 40. Mounting bracket; 41. Bracket body; 42. Support ring; 43. Limiting rib;

[0038] 50. Lifting mechanism; 51. Lifting drive component; 52. Driven component; 521. Internal thread; 53. Drive gear.

[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0041] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] In existing lawnmowers, the blade disc is typically used for cutting and shredding, while the blade disc drive shaft is responsible for transmitting power to the blade disc so that it can rotate normally to complete the work. However, existing lawnmowers are prone to situations where weeds are located above the blade disc or even entangled in the blade disc drive shaft, which hinders the normal rotation of the blade disc and seriously affects the normal operation of the lawnmower.

[0044] To solve this technical problem, this utility model proposes a lawnmower.

[0045] Please see Figures 1 to 10 In one embodiment of this utility model, the lawnmower includes a bottom wall and a cutting assembly 20. The bottom wall has a through hole 11. The cutting assembly 20 includes a blade disc 21 and a blade disc drive 23. The blade disc drive 23 is mounted on the bottom wall and has a drive shaft 231. The drive shaft 231 passes through the through hole 11 and is connected to the blade disc 21. The blade disc 21 has a plurality of blades 22 arranged around its circumference. The bottom wall and / or the blade disc 21 are provided with an annular protective structure to prevent debris from entering between the bottom wall and the blade disc 21, thereby improving the operating efficiency of the lawnmower.

[0046] In the technical solution of this utility model, the drive shaft 231 of the cutter head drive component 23 passes through the through hole 11 in the bottom wall and is connected to the cutter head 21 to drive the cutter head 21. An annular protective structure is provided on the bottom wall and / or the cutter head 21. This annular protective structure surrounds the drive shaft 231 from all sides, while the drive shaft 231 is hidden inside the annular protective structure. Compared to not having an annular protective structure or using protective railings, the annular protective structure can continuously prevent debris from entering between the bottom wall and the cutter head 21, reliably reducing the possibility of debris such as weeds and vines entering between the bottom wall and the cutter head 21. This effectively prevents grass accumulation above the cutter head 21 and even hinders the normal rotation of the cutter head 21, ensuring the cutting efficiency of the cutting component 20. Simultaneously, it reduces the workload of maintenance and cleaning, thereby improving the operating efficiency of the lawnmower.

[0047] It should be noted that, because the annular protective structure is a complete ring structure, it is always set around the drive shaft 231 in both working and stopped states without affecting the normal rotation of the cutter head 21. This prevents debris from entering between the bottom wall and the cutter head 21, avoiding the accumulation of grass and vines on the cutter head 21 or their entanglement on the drive shaft 231. As a result, there is no need to stop the machine for manual cleaning, thereby improving the operating efficiency of the lawnmower, reducing the workload of the operator, and ensuring safety.

[0048] The annular protective structure can be set at the periphery of the cutter head 21, and / or the annular protective structure can be set close to the drive shaft 231 to reliably enhance the protective force, thereby ensuring the normal rotation of the cutter head 21.

[0049] Optionally, in an embodiment of this utility model, the lawnmower further includes a drive cylinder 10, with a bottom wall formed on the drive cylinder 10. The bottom wall of the drive cylinder 10 has a through hole 11, allowing the body of the blade drive component 23 to be housed within the drive cylinder 10. Its drive shaft 231 extends through the through hole 11 and connects to the blade disc 21 outside the drive cylinder 10. A ring-shaped protective structure is then provided between the drive cylinder 10 and the blade disc 21, achieving the lawnmower's anti-weed accumulation function. However, this design is not limited to this. In other embodiments, the lawnmower also includes a housing 30, which includes a bottom shell with a bottom wall formed on it. The blade drive component 23 is specifically a blade disc 21 drive motor.

[0050] Optionally, in an embodiment of this utility model, the annular protective structure includes a first protective ring 12. The first protective ring 12 is fixed to the lower side of the drive cylinder 10 and surrounds the outer side of the cutter disc 21. That is, without affecting the normal rotation of the cutter disc 21, the first protective ring 12 is located on the outer side of the cutter disc 21 and above the blade 22, isolating the upper area of ​​the cutter disc 21, thereby reducing the possibility of debris entering between the cutter disc 21 and the drive cylinder 10, thus improving the reliability and service life of the lawnmower and also increasing work efficiency. The first protective ring 12 and the drive cylinder 10 can be integrally formed or welded together, or they can be connected by connecting ribs to further ensure the connection strength and stability between the first protective ring 12 and the drive cylinder 10, improving the protective effect of the first protective ring 12.

[0051] Optionally, in an embodiment of this utility model, the annular protective structure includes a second protective ring 211. The second protective ring 211 is disposed on the upper side of the cutter disc 21 and is arranged around the outside of the through hole 11. That is, without affecting the normal rotation of the cutter disc 21, the second protective ring 211 extends toward the bottom wall of the drive cylinder 10. At this time, the bottom wall of the drive cylinder 10 can be provided with a slot for the second protective ring 211 to be inserted, which can increase the difficulty for debris to enter the area between the drive cylinder 10 and the cutter disc 21 to a certain extent, thereby improving the reliability and service life of the lawnmower and also improving the working efficiency. The second protective ring 211 can be disposed on the upper edge of the cutter disc 21, or it can be disposed between the upper edge of the cutter disc 21 and the drive shaft 231.

[0052] Optionally, in an embodiment of this utility model, the annular protective structure includes a first protective ring 12 and a second protective ring 211. The first protective ring 12 is provided on the lower side of the drive cylinder 10, and the second protective ring 211 is provided on the upper side of the cutter disc 21. The first protective ring 12 and the second protective ring 211 are arranged in a radially at least partially stacked manner, such as... Figure 5 and Figure 8As shown, the first protective ring 12 can be located outside the second protective ring 211 and partially overlapped, or the first protective ring 12 can be located inside the second protective ring 211 and partially overlapped, or the first protective ring 12 and the second protective ring 211 can be positioned opposite each other, with one of the first protective ring 12 and the second protective ring 211 having an annular slot and the other being inserted into the annular slot to form a partially overlapped arrangement; this can effectively increase the difficulty for debris to enter the area between the pneumatic cylinder and the blade disc 21, thereby improving the reliability and service life of the lawnmower and also increasing work efficiency.

[0053] Optionally, in an embodiment of this utility model, when the lawnmower is in operation, the blade 22 extends beyond the periphery of the cutter head 21, and the maximum cutting diameter formed by the blade 22 is smaller than the outer diameter of the drive cylinder 10. On the one hand, since the cutter head 21 is located below the drive cylinder 10, and the maximum cutting diameter is smaller than the diameter of the drive cylinder 10, even if the blade 22 breaks accidentally, the fragments will be blocked by the drive cylinder 10, preventing them from flying and injuring people. Furthermore, even if the operator or external debris accidentally approaches the drive cylinder 10, it is unlikely that they will come into contact with the blade 22, effectively improving the operational safety of the lawnmower and extending the service life of the blade 22, thus saving costs. On the other hand, this helps to make the cutting speed of the blade 22 more uniform during rotation, thereby cutting grass blades more efficiently, reducing tearing and uneven cutting of grass blades, and improving the mowing efficiency of the lawnmower.

[0054] In addition, the drive cylinder 10 equipped with the cutting component 20 can perform the functions of driving and cutting in a small space, and is also easy to carry and store.

[0055] Please see Figures 3 to 5 , Figure 9 and Figure 10 In an embodiment of this utility model, the lawnmower also includes a plurality of protective covers 24, which are installed on the drive cylinder 10, and at least part of the protective covers 24 are located outside the blade disc 21. In this way, the area where the blade disc 21 and the blades 22 are located can be well covered, thereby preventing the operator from contacting the rotating blade disc 21 and the blades 22, and also preventing broken blades 22 from flying and injuring people.

[0056] The bottom wall of the drive cylinder 10 is provided with a mounting position for fixing the protective cover 24. This mounting position can be configured as a welding position or a mounting hole formed in the bottom wall of the cylinder, so as to set the corresponding mounting position according to different installation processes to meet the assembly of the protective cover 24 on the drive cylinder 10.

[0057] Multiple mounting positions are arranged along the circumference of the drive cylinder 10. One or more mounting positions are selected for installing the protective cover 24 according to the protection requirements, while the remaining mounting positions can be covered by a shield. In this embodiment, two protective covers 24 are symmetrically arranged, forming a grass passage gap between the two protective covers 24. This gap can guide grass blades into the cutting area of ​​the blade 22 to complete the grass cutting operation, and can also reduce the possibility of grass blades clogging the blade disc 21 and the protective cover 24, thereby improving the efficiency.

[0058] Specifically, in an embodiment of this utility model, the protective cover 24 includes a connecting plate 241 and a protective plate 242. The connecting plate 241 is connected to the drive cylinder 10, and the protective plate 242 is folded from the outer edge of the connecting plate 241 away from the drive cylinder 10. Thus, the protective plate 242 is formed by a bending process, which can improve the overall structural strength of the protective cover 24. The connecting plate 241 may be annular to fit against the bottom wall of the drive cylinder 10, and the assembly of the protective cover 24 onto the bottom wall of the drive cylinder 10 can be completed by fastening it with screws, for example.

[0059] Furthermore, in the embodiments of this utility model, the outer diameter D1 of the drive cylinder 10 and the outer contour diameter D2 of the connecting plate 241 satisfy: 0≤D2-D1≤20mm. It can be understood that when the blade tip circle diameter formed by each blade 22 is smaller than the outer diameter of the drive cylinder 10, placing the protective cover 24 on the outside of the blade tip can reduce the volume of the mowing area enclosed by the protective cover 24, while simplifying the structure of the protective cover 24 and reducing the amount of material used, thus reducing the overall weight of the protective cover 24.

[0060] By limiting the difference between the outer diameter of the drive cylinder 10 and the outer contour diameter of the connecting plate 241 to no more than 20mm, a step will not form at the connection between the connecting plate 241 and the drive cylinder 10, or the formed step will be insufficient to accumulate grass clippings, i.e., the radial width of the step surface will not exceed 10mm, thereby effectively preventing grass accumulation and reducing maintenance and cleaning work. Of course, in other embodiments, the step surface can be smoothed or inclined to increase the difficulty of grass clipping accumulation.

[0061] Please see Figures 1 to 4 , Figure 7 In an embodiment of this utility model, the lawnmower also includes a housing 30, which is provided with a lifting passage 31. The drive cylinder 10 is vertically and vertically inserted through the lifting passage 31 via a lifting mechanism 50. Thus, the lifting mechanism 50 controls the drive cylinder 10 to rise or fall along the axial direction of the lifting passage 31, thereby driving the blade 22 to rise or fall, thereby adjusting the height of the blade 22 to adapt to different terrain environments.

[0062] Specifically, in the embodiments of this utility model, the sidewall of the drive cylinder 10 includes an inner cylinder sidewall 131 and an outer cylinder sidewall 132, the hardness of the outer cylinder sidewall 132 being higher than that of the inner cylinder sidewall 131; and / or, the drive cylinder 10 is sealed to the lifting port 31. It is understood that a sealing ring 32 is provided between the inner surface of the outer cylinder sidewall 132 and the lifting port 31 to ensure the sealing of the lawnmower at the lifting port 31, preventing grass clippings, water, dust and other debris from entering the interior of the housing 30 through the lifting port 31, thereby improving the safety and reliability of the internal structure of the housing 30.

[0063] Specifically, the inner surface of the lifting port 31 has a groove for the sealing ring 32 to be embedded. Because the hardness of the outer cylinder sidewall 132 is higher than that of the inner cylinder sidewall 131, the sealing surface where the outer cylinder sidewall 132 abuts against the sealing ring 32 is not easily deformed, ensuring the structural accuracy of the sealing surface and thus guaranteeing the sealing effect between the drive cylinder 10 and the inner surface of the lifting port 31. The inner cylinder sidewall 131 is made of plastic to facilitate the molding of the drive cylinder 10, while the outer cylinder sidewall 132 is made of a material with high hardness, specifically hard alloy, stainless steel, or composite material. However, this design is not limited to this; in other embodiments, the drive cylinder 10 as a whole has high hardness, meaning the inner cylinder sidewall 131 and the outer cylinder sidewall 132 can be made of the same material.

[0064] Furthermore, the housing 30 includes a bottom shell and a support ring seat. The support ring seat is fixed to the bottom shell and forms a lifting passage 31. This increases the surface area in contact with the drive cylinder 10, improving the sealing effect and providing a certain degree of limiting and guiding function, thereby enhancing the lifting stability of the drive cylinder 10. Simultaneously, the bottom shell can be designed to be thinner while maintaining structural stability, reducing the overall weight of the lawnmower. The support ring seat is sealed to the bottom shell, preventing water or dust from entering the housing 30.

[0065] Optionally, in an embodiment of the present invention, the housing 30 is provided with a mounting bracket 40; the lifting mechanism 50 includes a lifting drive component 51 and a driven component 52, the lifting drive component 51 is disposed on the mounting bracket 40 and is drivenly connected to the driven component 52, the driven component 52 is rotatably mounted on the mounting bracket 40 and is connected to the drive cylinder 10 in a transmission manner.

[0066] Understandable, such as Figure 2 and Figure 4The mounting bracket 40 includes a bracket body 41 and a support ring 42. The bracket body 41 is fixedly connected to the housing 30 and has a limiting part corresponding to the lifting passage 31. The support ring 42 is located below the limiting part and is fixedly connected to the limiting part to form a mounting cavity for fixing the lifting drive component 51 and supporting the driven component 52, thereby ensuring reliable driving of the driven component 51 to the driven component 52. Specifically, the lifting drive component 51 can be configured as a lifting drive motor, and the driven component 52 can be a screw or a threaded cylinder.

[0067] The lifting drive component 51 can drive the driven component 52 to rotate through the drive gear 53. The rotation of the driven component 52 drives the drive cylinder 10 to move up and down, thereby realizing the adjustment of the height of the blade 22. Specifically, the driven component 52 can achieve the transmission cooperation with the drive cylinder 10 through rope, linkage structure or threaded engagement, etc., which is not limited here.

[0068] Specifically, in this embodiment of the invention, the driven member 52 is sleeved on the outside of the driving cylinder 10. The driven member 52 and the driving cylinder 10 are driven by the engagement of the internal thread 521 and the external thread 14, which provides efficient and precise transmission and improves the accuracy of the blade 22 height adjustment. The structure is simple and compact, which helps to reduce the overall size. However, this design is not limited to this. In other embodiments, the driving cylinder 10 is sleeved on the outside of the driven member 52, or the driven member 52 may be a screw.

[0069] To limit the lifting path of the drive cylinder 10, a limiting part protrudes from the inner surface of the support ring 42 and is located directly above the drive cylinder 10. By providing a limiting rib 43 on the lower surface of the limiting part facing the drive cylinder 10, the drive cylinder 10 is located at its upper limit position when it contacts the limiting rib 43. Furthermore, the limiting part can be folded downward to form an annular flange. At this time, the inner surface of the drive cylinder 10 is provided with a limiting protrusion 15, which is spaced apart from the annular flange, which helps to stabilize the lifting and lowering of the drive cylinder 10.

[0070] The outer surface of the drive cylinder 10 is provided with a drive protrusion. When the drive protrusion rests on the edge of the lifting passage 31, the drive cylinder 10 is located at its lower limit position. When the driven member 52 is located outside the drive cylinder 10, the external thread 14 is formed on the drive protrusion to ensure the transmission connection between the drive cylinder 10 and the driven member 52.

[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A lawnmower, characterized in that, include: The bottom wall has through holes; A cutting assembly includes a cutter head and a cutter head drive component. The cutter head drive component is mounted on the bottom wall and has a drive shaft. The drive shaft passes through the through hole and is connected to the cutter head. The cutter head is provided with a plurality of blades along its circumference. The bottom wall and / or the cutter head are provided with an annular protective structure to prevent debris from entering between the bottom wall and the cutter head.

2. The lawnmower as described in claim 1, characterized in that, The lawnmower also includes a drive cylinder, and the bottom wall is formed on the drive cylinder.

3. The lawnmower as described in claim 2, characterized in that, The annular protective structure includes a first protective ring, which is fixed to the lower side of the drive cylinder and surrounds the outer side of the cutter head. Alternatively, the annular protective structure includes a second protective ring, which is disposed on the upper side of the cutter head and around the outside of the through hole; Alternatively, the annular protective structure includes a first protective ring and a second protective ring, with the first protective ring provided on the lower side of the drive cylinder and the second protective ring provided on the upper side of the cutter head, and the first protective ring and the second protective ring being at least partially stacked in their radial direction.

4. The lawnmower as described in claim 2, characterized in that, When the lawnmower is in operation, the blade extends beyond the periphery of the cutter head, and the maximum cutting diameter formed by the blade is smaller than the outer diameter of the drive cylinder.

5. The lawnmower as described in claim 2, characterized in that, The lawnmower also includes multiple protective covers mounted on the drive cylinder, with at least a portion of the protective covers located outside the cutter head.

6. The lawnmower as described in claim 5, characterized in that, The protective cover includes a connecting plate and a protective plate. The connecting plate is connected to the drive cylinder, and the protective plate is folded from the outer edge of the connecting plate away from the drive cylinder.

7. The lawnmower as described in claim 6, characterized in that, The outer diameter D1 of the drive cylinder and the outer contour diameter D2 of the connecting plate satisfy: 0≤D2-D1≤20mm.

8. The lawnmower as described in any one of claims 2 to 7, characterized in that, The lawnmower also includes a housing, which has a lifting opening, and the drive cylinder is movably inserted into the lifting opening via a lifting mechanism.

9. The lawnmower as described in claim 8, characterized in that, The drive cylinder has an inner cylinder sidewall and an outer cylinder sidewall, and the hardness of the outer cylinder sidewall is higher than that of the inner cylinder sidewall. And / or, the drive cylinder is sealed to the lifting port.

10. The lawnmower as described in claim 8, characterized in that, The housing is equipped with a mounting bracket; The lifting mechanism includes a lifting drive component and a driven component. The lifting drive component is disposed on the mounting bracket and is drivenly connected to the driven component. The driven component is rotatably mounted on the mounting bracket and is drivenly connected to the drive cylinder.

Images