Lawn mower

Abstract

This invention relates to a lawnmower, comprising a housing; wheels connected to the housing; a cutting disc located at the bottom of the housing; a height adjustment assembly connected to the cutting disc; and a drive component fixed to the housing, the drive component driving the height adjustment assembly to rotate. When the drive component drives the height adjustment assembly to rotate in a first direction, the height adjustment assembly causes the cutting disc to slide along its axial direction. When the drive component drives the height adjustment assembly to rotate in a second direction, the height adjustment assembly causes the cutting disc to rotate, thereby achieving the cutting function. This invention, by controlling the direction of the drive component, can separately control the height adjustment and cutting action, achieving both automatic height adjustment and fulfilling the cutting operation requirements, reducing product costs and saving space.

Description

Technical Field

[0001] This invention belongs to the field of garden equipment technology, and in particular relates to a lawnmower. Background Technology

[0002] Intelligent lawnmowers are robotic lawnmowers that maintain lawns. They offer advantages such as intelligence, modernity, environmental friendliness, and hands-free operation, making them increasingly popular with the market and consumers. During operation, intelligent lawnmowers require setting an appropriate cutting height based on user needs and the type of grass planted.

[0003] The current common solution is to manually set the height, which often requires the user to go to the machine to adjust the settings, which is very inconvenient; or, to add an extra height adjustment motor, which not only takes up a lot of space and has a complex structure, but also increases costs. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a lawnmower that solves the problem that the existing technology requires an additional height adjustment motor, resulting in a complex mechanism and space occupation.

[0005] To achieve the above and other related objectives, the present invention provides a lawnmower, comprising:

[0006] chassis;

[0007] The wheels are connected to the housing.

[0008] The cutting disc is located at the bottom of the housing;

[0009] The height adjustment component is connected to the cutting disc;

[0010] A drive component is fixed to the housing, and the drive component drives the height adjustment assembly to rotate.

[0011] When the driving component drives the height adjustment assembly to rotate in the first direction, the height adjustment assembly causes the cutting disc to slide along its axial direction;

[0012] When the driving component drives the height adjustment assembly to rotate in the second direction, the height adjustment assembly drives the cutting disc to rotate, thereby realizing the cutting function.

[0013] Furthermore, when the driving component drives the height adjustment assembly to rotate in the first direction, the cutting disc slides up to a position exceeding the highest position, and then descends to the lowest position.

[0014] Furthermore, the lawnmower also includes a locking component, which has an unlocked state and a locked state. When the height adjustment component rotates in the first direction, the locking component is in the unlocked state, and the height adjustment component and the cutting disc move relative to each other.

[0015] Furthermore, when the height adjustment component rotates in the second direction, the locking member is in a locked state, and the height adjustment component and the cutting disc are relatively fixed.

[0016] Furthermore, the height adjustment component includes:

[0017] The cutter head connecting shaft is used to connect the cutting cutter head and transmit rotational power to it, and can move up and down along its axial direction;

[0018] The height-adjusting rotary drum is sleeved with the cutter head connecting shaft. The height-adjusting rotary drum is provided with ratchet teeth that spiral upwards along its axial direction. The cutter head connecting shaft is provided with pawls that move in coordination with the ratchet teeth.

[0019] Furthermore, when the driving component drives the height-adjusting drum to rotate in the first direction, the pawl climbs along the helical direction of the ratchet teeth to make the cutter head connecting shaft rise along its axial direction; when the driving component drives the height-adjusting drum to rotate in the second direction, the pawl engages with the ratchet teeth to make the cutter head connecting shaft rotate in the second direction.

[0020] Furthermore, when the pawl ascends to the top along the spiral direction of the ratchet teeth, the pawl disengages from the top of the ratchet teeth and falls back to the bottom of the ratchet teeth.

[0021] Furthermore, at least two pawls are arranged circumferentially along the connecting shaft of the cutter head.

[0022] Furthermore, a sliding ring is provided between the cutter head connecting shaft and the locking member, the cutter head connecting shaft slides in axial direction with the sliding ring, an anti-rotation guide structure is provided between the cutter head connecting shaft and the sliding ring, and the locking member prevents the sliding ring from rotating in the first direction, while allowing the sliding ring to rotate in the second direction.

[0023] Furthermore, the anti-rotation guide structure includes:

[0024] A limiting ridge is axially disposed on the outer wall of the cutter head connecting shaft; and

[0025] A limiting groove is provided axially on the inner wall of the sliding ring, and the limiting groove cooperates with the limiting edge.

[0026] Furthermore, the limiting edge is arranged circumferentially along the cutter head connecting shaft; the limiting groove is arranged circumferentially along the sliding ring, and the limiting groove corresponds one-to-one with the limiting edge.

[0027] Furthermore, the height-adjusting rotary drum includes:

[0028] A cylindrical body, the interior of which is hollow, and the ratchet teeth are disposed on the outer wall of the cylindrical body; and

[0029] A limiting plate is connected to the end of the cylinder. The outer diameter of the limiting plate is larger than the outer diameter of the cylinder. The end of the ratchet extends to the limiting plate.

[0030] Furthermore, the bottom of the limiting plate is provided with a connecting part for connecting the driving component, the driving component is disposed inside the height adjustment drum, and the output shaft of the driving component is connected to the connecting part.

[0031] Furthermore, the cutter head connecting shaft is hollow inside, and the height-adjusting rotary drum is located inside the cutter head connecting shaft. The cutter head connecting shaft includes:

[0032] The first shaft segment, wherein the pawl is disposed on the inner wall of the first shaft segment; and

[0033] The second shaft segment is connected to the end of the first shaft segment, and the diameter of the second shaft segment is larger than that of the first shaft segment. There is a limiting step between the second shaft segment and the first shaft segment, and the limiting plate of the height-adjusting rotary drum cooperates with the limiting step to limit movement.

[0034] As described above, the present invention has the following beneficial effects:

[0035] By setting up a height adjustment component, the height adjustment and mowing operations can share a single drive unit. By controlling the steering of the drive unit, the height adjustment and cutting actions can be controlled separately. This achieves both automatic height adjustment and cutting operations, reduces product costs, saves space occupied by the height adjustment-mowing system, and has the advantages of simple structure and convenient operation. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the assembly structure of the height adjustment component and the drive component according to an embodiment of the present invention;

[0037] Figure 2 This is a cross-sectional view of the assembly structure of the height adjustment component and the drive component according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the height-adjusting rotating drum according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of the cutter head connecting shaft according to an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the sliding ring structure according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of a lawnmower component according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the overall structure of the lawnmower according to an embodiment of the present invention.

[0043] Part Number Explanation

[0044] 10-Drive components;

[0045] 20-Height adjustment drum; 21-Drum body; 211-Ratchet; 22-Limiting plate; 221-Connecting part;

[0046] 30 - Cutter head connecting shaft; 31 - First shaft section; 311 - Pawl; 32 - Second shaft section; 321 - Limiting edge;

[0047] 40 - Sliding ring; 41 - Limiting groove;

[0048] 50 - Locking parts;

[0049] 60 - Cutting blade disc; 61 - Cutting blade;

[0050] 200 - Casing; 300 - Wheels. Detailed Implementation

[0051] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0052] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0053] A lawnmower typically includes a control unit that controls both its self-propelled and cutting functions, a housing 200, wheels 300 for moving the lawnmower, a drive unit 10 that provides power for the cutting function, and a cutting disc 60 that performs the cutting function. Additionally, the lawnmower includes a height adjustment mechanism that allows adjustment of the cutting disc's height relative to the ground.

[0054] Please combine Figures 1 to 7As shown, the walking wheels are connected to the housing 200; the cutting disc 60 is located at the bottom of the housing 200; the height adjustment component is connected to the cutting disc 60; the drive component 10 is fixed to the housing 200, and the drive component 10 drives the height adjustment component to rotate; when the drive component 10 drives the height adjustment component to rotate in the first direction, the height adjustment component drives the cutting disc 60 to slide upward along its axial direction; when the drive component 10 drives the height adjustment component to rotate in the second direction, the height adjustment component drives the cutting disc 60 to rotate, thereby realizing the cutting function.

[0055] In other embodiments, the height adjustment component drives the cutting disc 60 to slide downward along its axial direction; when the driving component 10 drives the height adjustment component to rotate in the second direction, the height adjustment component drives the cutting disc 60 to rotate, thereby realizing the cutting function.

[0056] Furthermore, when the driving component drives the height adjustment assembly to rotate in the first direction, the cutting disc slides up to a position exceeding the highest position, and then descends to the lowest position.

[0057] By setting up a height adjustment component, the upward and rotational movements of the cutter head connecting shaft 30 can share a single drive component 10. Thus, by adjusting the direction of the drive component 10, the operation of the height adjustment system and the mowing system can be achieved respectively, thereby reducing product costs and space requirements.

[0058] The height adjustment assembly includes a cutter head connecting shaft 30 and a height adjustment drum 20. The cutter head connecting shaft 30 connects to the cutting cutter head 60 and transmits rotational power to it, and is capable of moving up and down along its axial direction. The height adjustment drum 20 is sleeved with the cutter head connecting shaft 30. The height adjustment drum 20 is provided with ratchet teeth 211 that spiral upwards along its axial direction, and the cutter head connecting shaft 30 is provided with pawls 311 that cooperate with the ratchet teeth 211. The driving component 10 is connected to the height adjustment drum 20 and is used to drive the height adjustment drum 20 to rotate in a first direction or a second direction, wherein the first direction or the second direction is either clockwise or counterclockwise.

[0059] When the drive component 10 drives the height-adjusting drum 20 to rotate in the first direction, the ratchet 211 and pawl 311 work together to drive the cutter head connecting shaft 30 to rise along its axial direction; when the drive component 10 drives the height-adjusting drum 20 to rotate in the second direction, the ratchet 211 and pawl 311 work together to transmit rotational power to the cutter head connecting shaft 30, causing the cutter head connecting shaft 30 to rotate in the second direction.

[0060] The lawnmower also includes a locking member 50, which has an unlocked state and a locked state. When the height adjustment component rotates in a first direction, the locking member 50 is in the unlocked state, and the height adjustment component and the cutting disc 60 move relative to each other. When the height adjustment component rotates in a second direction, the locking member 50 is in the locked state, and the height adjustment component and the cutting disc 60 are relatively fixed. Specifically, the locking member 50 cooperates with the disc connecting shaft 30 to restrict the rotation of the disc connecting shaft 30 in the first direction (making it unable to rotate in the first direction), while allowing the disc connecting shaft 30 to rotate in the second direction.

[0061] Furthermore, a sliding ring 40 is provided between the cutter head connecting shaft 30 and the locking member 50. The cutter head connecting shaft 30 slides axially with the sliding ring 40. An anti-rotation guide structure is provided between the cutter head connecting shaft 30 and the sliding ring 40. The locking member 50 prevents the sliding ring 40 from rotating in a first direction, but allows the sliding ring 40 to rotate in a second direction. That is, the cutter head connecting shaft 30 and the sliding ring 40 can rotate together, and the cutter head connecting shaft 30 can move axially relative to the sliding ring 40.

[0062] When the driving component 10 drives the height-adjusting drum 20 to rotate in the first direction, the locking component 50 prevents the sliding ring 40 and the cutter head connecting shaft 30 from rotating, and the cutter head connecting shaft 30 rises under the action of the ratchet 211 and the pawl 311. When the driving component 10 drives the height-adjusting drum 20 to rotate in the second direction, the locking component 50 allows the sliding ring 40 and the cutter head connecting shaft 30 to rotate, and the cutter head connecting shaft 30 rotates together with the height-adjusting drum 20 under the action of the ratchet 211 and the pawl 311.

[0063] The locking element 50 restricts the sliding ring 40 from rotating in the first direction and allows it to rotate only in the second direction. Since the cutter head connecting shaft 30 rotates together with the sliding ring 40, the rotation of the cutter head connecting shaft 30 in the first direction is restricted, and it can only rotate in the second direction. In some embodiments, the locking element 50 includes an inner ring portion and an outer ring portion. The inner ring portion is fixed to the outer wall of the sliding ring 40, and the outer ring portion is used to fix it to the housing 200. Specifically, the locking element 50 can be a one-way bearing, with the inner ring of the one-way bearing fixed to the sliding ring 40 and the outer ring of the one-way bearing used to fix it to the housing 200. This structure can prevent the sliding ring 40 from rotating in the first direction, but allow it to rotate in the second direction.

[0064] In some embodiments of the present invention, when the driving component 10 drives the height-adjusting rotary drum 20 to rotate in a first direction, the pawl 311 rises along the helical direction of the ratchet 211, causing the cutter head connecting shaft 30 to rise axially. When the driving component 10 drives the height-adjusting rotary drum 20 to rotate in a second direction, the pawl 311 engages with the ratchet 211, causing the cutter head connecting shaft 30 to rotate together with the height-adjusting rotary drum 20 in the second direction. Thus, through the interaction between the pawl 311 and the ratchet 211, different needs can be met to enable the cutter head connecting shaft 30 to perform either a height adjustment operation or a rotational cutting operation.

[0065] In some embodiments of the present invention, when the pawl 311 climbs to the top along the spiral direction of the ratchet 211, the pawl 311 disengages from the top of the ratchet 211 and falls back to the bottom of the ratchet 211. This structure ensures that the cutter head connecting shaft 30 can automatically return to the initial position after being adjusted to the limit height, and the height adjustment operation can be repeated when adjustment is needed next time.

[0066] In some embodiments of the present invention, a ratchet 211 is disposed on the outer wall of the height-adjusting drum 20, and the ratchet 211 is configured to spirally ascend one revolution along the axial direction of the height-adjusting drum, with the top and bottom ends of the ratchet 211 axially aligned. Viewed from the top of the height-adjusting drum, the ratchet 211 spirals counterclockwise, and the tips of the ratchet 211 extend in the ascending direction.

[0067] In some embodiments of the present invention, pawls 311 are disposed on the inner wall of the cutter head connecting shaft 30, and at least two pawls 311 are arranged circumferentially along the inner wall of the cutter head connecting shaft 30. In this embodiment, two pawls 311 are arranged opposite each other circumferentially along the inner wall of the cutter head connecting shaft 30. This can play a balancing and adjusting role, ensuring that the movement of the cutter head connecting shaft 30 as it rises with the pawls 311 is smooth, and ensuring the stability and reliability of the height adjustment operation.

[0068] See Figure 4 and Figure 5 Because an anti-rotation guide structure is provided between the sliding ring 40 and the cutter head connecting shaft 30, the cutter head connecting shaft 30 can only slide relative to the sliding ring 40 and will not rotate relative to it. In some embodiments, the anti-rotation guide structure includes a limiting ridge 321 and a limiting groove 41. The limiting ridge 321 is axially disposed on the outer wall of the cutter head connecting shaft 30, and the limiting groove 41 is axially disposed on the inner wall of the sliding ring 40, and the limiting groove 41 cooperates with the limiting ridge 321. This structure, by having the limiting ridge 321 engaged in the limiting groove 41, ensures that the cutter head connecting shaft 30 can slide up and down along the limiting groove 41 of the sliding ring 40, while preventing circumferential rotation between the cutter head connecting shaft 30 and the sliding ring 40.

[0069] In some embodiments of the present invention, multiple limiting ridges 321 are arranged circumferentially along the cutter head connecting shaft 30; multiple limiting grooves 41 are arranged circumferentially along the sliding ring 40, and each limiting groove 41 corresponds to a limiting ridge 321. This structure ensures that the cutter head connecting shaft 30 can maintain a smooth axial sliding process within the sliding ring 40, thereby ensuring the stability and reliability of the height adjustment operation. In this embodiment, four limiting ridges 321 are evenly distributed circumferentially along the cutter head connecting shaft 30, and four limiting grooves 41 are evenly distributed circumferentially along the sliding ring 40.

[0070] In other embodiments, the limiting ridge 321 may be disposed on the inner wall of the sliding ring 40, and correspondingly, the limiting groove 41 may be disposed on the outer wall of the cutter head connecting shaft 30. In other embodiments, the anti-rotation guide structure may also be configured in other structural forms, as long as it can play the role of circumferential anti-rotation and axial guidance.

[0071] See Figure 3 In some embodiments of the present invention, the height-adjusting rotary drum 20 includes: a cylinder 21 and a limiting disk 22. The cylinder 21 is hollow inside, and ratchet teeth 211 are disposed on the outer wall of the cylinder 21. The limiting disk 22 is connected to the end of the cylinder 21, and the outer diameter of the limiting disk 22 is larger than the outer diameter of the cylinder 21. The ends of the ratchet teeth 211 extend onto the limiting disk 22. Specifically, the top end of the cylinder 21 is open so that the driving component 10 can be placed inside the cylinder 21. The limiting disk 22 at the end of the cylinder 21 is used to limit the axial position of the cutter head connecting shaft 30.

[0072] In some embodiments of the present invention, the bottom of the limiting disk 22 is provided with a connecting portion 221 for connecting the driving component 10. The driving component 10 is disposed inside the height-adjusting rotary drum 20, and the output shaft of the driving component 10 is connected to the connecting portion 221. Specifically, the connecting portion 221 has a cylindrical structure, and a connecting hole is formed inside the connecting portion 221 along its axial direction. The output shaft of the driving component 10 is installed in the connecting hole. In this way, installation space can be provided for the driving component 10 without occupying external space.

[0073] In some embodiments of the present invention, the driving component 10 is a motor, which is directly connected to the height-adjusting drum 20; or, the driving component 10 includes a motor and a reduction mechanism, with the motor connected to the height-adjusting drum 20 via the reduction mechanism. Specifically, the motor is mounted on the housing 200, and a reduction mechanism may be provided depending on requirements. The reduction mechanism can be a gearbox to adjust the output speed and torque, so that the motor output speed is adjusted before the power is transmitted to the height-adjusting drum 20. By controlling the forward and reverse rotation of the motor, the rotation of the height-adjusting drum 20 in the first or second direction can be controlled.

[0074] See Figure 4 In some embodiments of the present invention, the interior of the cutter head connecting shaft 30 is hollow, used to house the height adjustment drum 20. The cutter head connecting shaft 30 includes: a first shaft segment 31, with a pawl 311 disposed on the inner wall of the first shaft segment 31; and a second shaft segment 32, connected to the end of the first shaft segment 31, and the diameter of the second shaft segment 32 is larger than the diameter of the first shaft segment 31. A limiting step is provided between the second shaft segment 32 and the first shaft segment 31, and the limiting plate 22 of the height adjustment drum 20 cooperates with the limiting step for limiting. Specifically, the first shaft segment 31 and the second shaft segment 32 are integrally formed. When the cutter head connecting shaft 30 is assembled with the height adjustment drum 20, the limiting step and the limiting plate 22 can play an axial limiting role, thereby ensuring the axial position of the cutter head connecting shaft 30 when it descends to the initial position. Furthermore, the pawl 311 is close to the limiting step. In the initial position, the pawl 311 starts to climb from the bottom of the ratchet 211; the limiting ridge 321 is set on the outer wall of the second shaft section 32, and the second shaft section 32 slides back and forth in the sliding ring 40.

[0075] In some embodiments of the present invention, the cutting disc 60 is connected to the bottom of the disc connecting shaft 30, and a plurality of cutting blades 61 are arranged circumferentially on the cutting disc 60. In this embodiment, three cutting blades 61 are evenly distributed axially on the cutting disc 60, and the heads of the cutting blades 61 protrude from the outer edge of the cutting disc 60. The cutting disc 60 is driven to move by the driving component 10 to realize the cutting operation. Since the disc connecting shaft 30 is connected to the cutting disc 60, the height of the cutting disc 60 above the ground can be adjusted by adjusting the height of the disc connecting shaft 30.

[0076] The specific operation process is as follows: When height adjustment is required, the control drive component 10 drives the height adjustment drum 20 to rotate in the first direction. Since the locking component 50 is in the blocking state in the first direction, it will prevent the sliding ring 40 and the cutter head connecting shaft 30 from rotating in the first direction, thereby causing the pawl 311 to climb along the spiral direction of the ratchet 211. The anti-rotation guide structure between the cutter head connecting shaft 30 and the sliding ring 40 allows the cutter head connecting shaft 30 and the sliding ring 40 to slide axially without relative rotation, thereby causing the cutter head connecting shaft 30 to rise together with the pawl 311, realizing the height adjustment function. When cutting is required, the control drive component 10 drives the height adjustment drum 20 to rotate in the second direction, which is opposite to the first direction. At this time, the pawl 311 and the ratchet 211 are engaged, and there is no relative movement between them. Since the locking component 50 is in the allowing state in the second direction, the cutter head connecting shaft 30 and the height adjustment drum rotate together, transmitting the rotational power of the drive component 10 to the cutting cutter head 60, so that the cutting system can operate normally and realize the cutting function.

[0077] Depending on the user's different needs, the control unit controls the height adjustment and cutting operations according to different working conditions. When performing the height adjustment operation, the control drive component 10 drives the height adjustment drum 20 to rotate in the first direction, so that the cutter head connecting shaft 30 rises along its axial direction. When performing the cutting operation, the control drive component 10 drives the height adjustment drum 20 to rotate in the second direction, so that the cutter head connecting shaft 30 rotates in the second direction. This can be achieved through remote control or through the equipment's built-in electronic control panel.

[0078] In summary, in the lawnmower provided in this embodiment of the invention, the ratchet on the height adjustment drum and the pawl on the blade connecting shaft, together with the locking component, enable the height adjustment system and the mowing system to share a single drive component. By controlling the direction of the drive component, the height adjustment and cutting actions are controlled respectively, thus achieving both automatic height adjustment and cutting operations, reducing product costs, saving space occupied by the height adjustment-mowing system, and having the advantages of simple structure and convenient operation.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A lawnmower, characterized in that, include: chassis; The wheels are connected to the housing. The cutting disc is located at the bottom of the housing; The height adjustment component is connected to the cutting disc; A drive component is fixed to the housing, and the drive component drives the height adjustment assembly to rotate. When the driving component drives the height adjustment assembly to rotate in the first direction, the height adjustment assembly causes the cutting disc to slide along its axial direction; When the driving component drives the height adjustment assembly to rotate in the second direction, the height adjustment assembly drives the cutting disc to rotate, thereby realizing the cutting function. The movement of the drive component can be controlled via remote control or electronic control panel; The height adjustment component includes a cutter head connecting shaft and a height adjustment rotary cylinder sleeved with the cutter head connecting shaft. The cutter head connecting shaft is used to connect the cutting cutter head and transmit rotational power to it, and can be raised and lowered along its axial direction. The height adjustment rotary cylinder is provided with ratchet teeth that spiral upwards along its axial direction, and the cutter head connecting shaft is provided with pawls that cooperate with the ratchet teeth. The lawnmower also includes a locking component. A sliding ring is provided between the blade connecting shaft and the locking component. The blade connecting shaft slides axially with the sliding ring. An anti-rotation guide structure is provided between the blade connecting shaft and the sliding ring. The locking component prevents the sliding ring from rotating in a first direction and allows the sliding ring to rotate in a second direction.

2. The lawnmower according to claim 1, characterized in that, When the driving component drives the height adjustment assembly to rotate in the first direction, the cutting disc slides up to a position higher than the highest position and then descends to the lowest position.

3. The lawnmower according to claim 1, characterized in that, The locking component has an unlocked state and a locked state. When the height adjustment component rotates in the first direction, the locking component is in the unlocked state, and the height adjustment component and the cutting disc move relative to each other.

4. The lawnmower according to claim 3, characterized in that, When the height adjustment component rotates in the second direction, the locking member is in a locked state, and the height adjustment component and the cutting disc are relatively fixed.

5. The lawnmower according to claim 1, characterized in that, When the drive component drives the height adjustment drum to rotate in the first direction, the pawl climbs along the helical direction of the ratchet teeth so that the cutter head connecting shaft rises along its axial direction; When the drive component drives the height adjustment drum to rotate in the second direction, the pawl and ratchet engage to make the cutter head connecting axis rotate in the second direction.

6. The lawnmower according to claim 5, characterized in that, When the pawl climbs to the top along the spiral direction of the ratchet teeth, the pawl disengages from the top of the ratchet teeth and falls back to the bottom of the ratchet teeth.

7. The lawnmower according to claim 1, characterized in that: The pawls are arranged in at least two circumferentially along the connecting shaft of the cutter head.

8. The lawnmower according to claim 1, characterized in that, The anti-rotation guide structure includes: A limiting ridge is axially disposed on the outer wall of the cutter head connecting shaft; and A limiting groove is provided axially on the inner wall of the sliding ring, and the limiting groove cooperates with the limiting edge.

9. The lawnmower according to claim 8, characterized in that, The limiting edge is arranged circumferentially along the cutter head connecting shaft; The limiting groove is arranged along the circumference of the sliding ring, and the limiting groove corresponds one-to-one with the limiting edge.

10. The lawnmower according to claim 1, characterized in that, The height-adjusting rotary drum includes: A cylindrical body, the interior of which is hollow, and the ratchet teeth are disposed on the outer wall of the cylindrical body; and A limiting plate is connected to the end of the cylinder. The outer diameter of the limiting plate is larger than the outer diameter of the cylinder. The end of the ratchet extends to the limiting plate.

11. The lawnmower according to claim 10, characterized in that, The bottom of the limiting plate is provided with a connecting part for connecting the driving component. The driving component is disposed inside the height-adjusting rotating drum, and the output shaft of the driving component is connected to the connecting part.

12. The lawnmower according to claim 10, characterized in that, The cutter head connecting shaft is hollow inside, and the height-adjusting rotary drum is located inside the cutter head connecting shaft. The cutter head connecting shaft includes: The first shaft segment, wherein the pawl is disposed on the inner wall of the first shaft segment; and The second shaft segment is connected to the end of the first shaft segment, and the diameter of the second shaft segment is larger than that of the first shaft segment. There is a limiting step between the second shaft segment and the first shaft segment, and the limiting plate of the height-adjusting rotary drum cooperates with the limiting step to limit movement.

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