Position adjustment assembly and automatic lawnmower

Abstract

The application discloses a position adjusting assembly and an automatic mower, and relates to a position adjusting assembly for an automatic mower, which comprises a first connecting arm, a lifting driving part, and a second connecting arm. The first connecting arm is used for driving the grass cutting head to rotate around a first rotation shaft to a horizontal position to perform a horizontal cutting mode or to a vertical position to perform a vertical cutting mode. The lifting driving part is used for adjusting the vertical height of the grass cutting head and comprises a bottom connecting plate, a top driving table, and a driving mechanism. The second connecting arm is used for driving the lifting driving part to rotate around a second rotation shaft to adjust the horizontal distance of the grass cutting head from the automatic mower. The vertical cutting mode is realized by the position adjusting assembly, so that the automatic mower can realize complete edge cutting. Meanwhile, the vertical cutting mode can also trim a regular boundary at the edge of a yard. In addition, the first connecting arm, the lifting driving part, and the second connecting arm can cooperate with each other to complete the height adjustment of the grass cutting head and the unfolding and storage actions of the grass cutting head, so as to ensure the passing performance of the automatic mower.

Description

Technical Field

[0001] This application relates to the field of lawn mowing equipment technology, and more specifically, to a position adjustment component and an automatic lawn mower. Background Technology

[0002] A lawnmower is a mechanical tool used to trim lawns, vegetation, etc., and is generally used for the maintenance and management of courtyards or gardens to ensure that the greenery maintains a certain aesthetic appeal. As people's demands for the cleanliness of courtyards or gardens increase, lawnmowers are required to meet the requirement of "no dead corners in the courtyard." Generally, lawnmowers rely on swivel or edge-cutting attachments to clean areas such as the base of courtyard walls and the edges of flower beds, but the cutting head cannot completely reach the edges (most lawnmowers can only cover a range of 1.5cm to 5cm from the edge of the courtyard), resulting in the need for manual trimming of areas such as the base of courtyard walls and the edges of flower beds, greatly increasing the user's workload. Furthermore, there are core defects such as difficulty in cutting right angles, interior corners, and irregular edges of the courtyard, making them prone to missed cuts.

[0003] To address the issue of insufficient edge-cutting precision in lawnmowers, a handheld manual lawnmower has been disclosed. The free end of the cutting line can be switched between horizontal rotation for cutting and vertical rotation for trimming, catering to different cutting needs. However, this handheld manual lawnmower, capable of switching between different cutting modes, is not suitable for automatic lawnmowers. For automatic lawnmowers to achieve this, the drive mechanism of the cutting head needs to be carefully designed to ensure both perfect edge-cutting and smooth operation, allowing the cutting head to flexibly and accurately switch between different cutting modes. Summary of the Invention

[0004] The main objective of this application is to provide a position adjustment component and an automatic lawnmower to solve the problem of insufficient edge-fitting accuracy of automatic lawnmowers in the related art.

[0005] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application.

[0006] According to a first aspect of this application, a position adjustment component is provided for an automatic lawnmower, comprising: A first connecting arm is rotatably connected to the trimming head via a first pivot. This arm drives the trimming head to rotate around the pivot to a horizontal position for horizontal trimming, or to a vertical position for vertical trimming. The first connecting arm drives the trimming head to rotate such that the angle A between the cutting plane of the trimming head and the horizontal plane is greater than or equal to 0 degrees and less than or equal to 90 degrees. In horizontal trimming mode, the cutting part on the trimming head rotates horizontally, cutting the weeds along their cross-section. Additionally, since weeds and branches naturally lean, a vertical trimming mode can also be used for vegetation trimming. In this mode, the cutting part on the trimming head rotates vertically, forming an angle with the weeds to cut them. In this vertical trimming mode, the cutting part on the trimming head can also sweep away weeds and branches from the edge of the yard, creating a regular boundary at the edge. A lifting drive component includes: a bottom connecting plate, a top drive platform, and a drive mechanism disposed between the bottom connecting plate and the top drive platform; the drive mechanism drives the top drive platform to lift and lower to adjust the vertical height of the mowing head; the lifting drive component drives the first connecting arm to lift and lower in the vertical direction to adjust the vertical height of the mowing head, so that the mowing head has sufficient vertical space to achieve the switching of the above working mode; The second connecting arm is rotatably connected to the bottom connecting plate via a second rotating shaft, and is used to drive the lifting drive component to rotate around the second rotating shaft to adjust the horizontal distance of the mowing head relative to the automatic lawnmower.

[0007] In one exemplary embodiment of this application, the drive mechanism in the lifting drive component includes: The X-support arm includes a first support arm and a second support arm hinged together via a support arm pivot. The unfolding action of the X-support arm lowers the height of the top drive platform, thereby reducing the vertical height of the mowing head; conversely, the retraction action of the X-support arm raises the height of the top drive platform, thereby increasing the vertical height of the mowing head. Furthermore, the X-support arm requires very little width space in the lifting drive components, only needing to occupy a significant portion of the length space of the lifting drive components. This lifting structure allows the lifting drive components to form a narrow cuboid structure, ensuring sufficient unfolded length for the position adjustment component without increasing its width. When the position adjustment component is retracted into the receiving cavity of the mower frame, the width space occupied by the position adjustment component in the mower frame is effectively reduced. The support arm pivot frame is provided on the bottom connecting plate and the top driving platform respectively; the connecting end of the first support arm is rotatably connected to the support arm pivot frame on the bottom connecting plate, and the connecting end of the second support arm is rotatably connected to the support arm pivot frame on the top driving platform. A push rod is mounted on the bottom connecting plate and extends horizontally, and is rotatably connected to the movable end of the second support arm to drive the X support arm to unfold or retract; the unfolding and retracting actions of the X support arm can be precisely controlled by the push rod. A guide rail, mounted on the top drive platform, guides the movable end of the first support arm to slide horizontally.

[0008] In one exemplary embodiment of this application, the bottom of the first end of the bottom connecting plate along its length is connected to the second connecting arm via a second rotating shaft; the side connection of the top driving platform is fixedly connected to the first connecting arm. This arrangement allows the second connecting arm to extend to its maximum length by using the length of the lifting driving component as the rotating arm during the rotation and unfolding process of the lifting driving component.

[0009] In one exemplary embodiment of this application, the push rod and the guide rail extend along the length direction of the drive mechanism; the drive mechanism further includes a drive motor for driving the push rod to extend or retract, the drive motor being disposed at the bottom of the first end. By arranging the push rod and guide rail along the length direction of the drive mechanism, not only can the width and overall size of the drive mechanism be effectively reduced, but the drive motor can also be disposed at one end along the length direction of the drive mechanism, thereby allowing the heavier drive motor to be positioned at the second pivot point of the second connecting arm, thus reducing the driving force required for the second connecting arm to rotate the drive mechanism.

[0010] In one exemplary embodiment of this application, the two ends of the guide rail are provided with guide rail brackets that are fixedly connected to the lower surface of the top drive platform; the movable end of the first support arm is slidably disposed on the guide rail through a sleeve; and the sleeve is also provided with a pulley that is rollably connected to the lower surface of the top drive platform.

[0011] In one exemplary embodiment of this application, the first connecting arm is further provided with a rotational position sensor for detecting the rotation angle of the hay-trimming head; the rotational position sensor converts the mechanical rotational motion of the first rotating shaft connected to the hay-trimming head into an electrical signal, thereby accurately measuring the rotation angle, angular displacement and rotation state; The rotational position sensor includes a potentiometer-type rotational angle sensor and / or an optical encoder and / or a magnetic encoder. This rotational position sensor can detect the rotation angle of the mowing head in real time, thereby controlling the mowing head to switch between different mowing modes.

[0012] In one exemplary embodiment of this application, the first connecting arm is a flat plate structure, which is fixedly connected to the side connection position of the top driving platform on the lifting drive component.

[0013] In one exemplary embodiment of this application, the first connecting arm includes a first driving member for driving the first rotating shaft to rotate; the first driving member is a gimbal motor.

[0014] In one exemplary embodiment of this application, the second connecting arm includes a gear set for driving the second rotating shaft to rotate, and a second driving member for driving the gear set to rotate; the gear set is a bevel gear set mounted on the second rotating shaft; The second rotating shaft extends vertically and drives the lifting drive component to rotate around the second rotating shaft, thereby causing the lifting drive component, the first connecting arm, and the mowing head to move horizontally relative to the automatic lawnmower.

[0015] According to a second aspect of this application, an automatic lawnmower is provided, comprising: Position adjustment component; and, A hay-cutting head, wherein the hay-cutting head is provided with a cutting section; A lawnmower frame is provided, on which the second connecting arm is mounted; and the lawnmower frame is also provided with a receiving cavity for accommodating the first connecting arm, the lifting drive component, and the mowing head; the position adjustment component has a retracted state and an extended state in the horizontal direction relative to the automatic lawnmower; in the retracted state, the second connecting arm drives the lifting drive component to rotate around the second pivot towards the direction closer to the automatic lawnmower, and the position adjustment component is retracted into the receiving cavity; in the extended state, the second connecting arm drives the lifting drive component to rotate around the second pivot towards the direction away from the automatic lawnmower.

[0016] The exemplary embodiments of this application may have some or all of the following beneficial effects: 1. In the position adjustment component provided in the example embodiment of this application, the first connecting arm can drive the mower head to switch between a horizontal mowing mode and a vertical trimming mode as needed. In the horizontal mowing mode, when the mower head is in the horizontal position, the cutting part on the mower head rotates horizontally to make a horizontal cut along the horizontal plane. In the vertical trimming mode, when the mower head is in the vertical position, the cutting part on the mower head rotates vertically to make a vertical cut along the vertical plane. In the vertical trimming mode, the first connecting arm can drive the mower head to be close to the edge of the yard, thereby improving the edge-fitting accuracy of the lawnmower and allowing the lawnmower to achieve complete edge-fitting. At the same time, the vertical trimming mode can also trim a regular boundary at the edge of the yard, solving the problems of slanted and messy weeds and branches at the edge of the yard and unclear yard edges.

[0017] Furthermore, in this embodiment, the second connecting arm drives the lifting drive component, the first connecting arm, and the trimmer head to extend and retract horizontally, adjusting the horizontal position of the cutting portion on the trimmer head. The rotation of the second connecting arm causes the entire trimmer head and position adjustment assembly to extend and retract from the automatic lawnmower. When the second connecting arm drives the lifting drive component to rotate close to the lawnmower frame, the lifting drive component, the first connecting arm, and the trimmer head can be retracted, improving the automatic lawnmower's maneuverability. Moreover, this application allows the vertical height of the trimmer head to be adjusted independently by the lifting drive component itself. Compared to other height adjustment methods, such as arranging a rotating mechanism in the vertical direction, which rotates synchronously with the first connecting arm to adjust the trimmer head height, the vertical height adjustment of the trimmer head in this embodiment is simpler and easier. The first connecting arm only needs to switch between different trimming modes and does not need to adjust the height; the first connecting arm can switch between different trimming modes as needed at any time.

[0018] 2. In the position adjustment component provided in the example embodiment of this application, the first connecting arm drives the trimmer head to rotate so that the angle A between the cutting plane of the trimmer head and the horizontal plane is greater than or equal to 0 degrees and less than or equal to 90 degrees. The first connecting arm can drive the trimmer head to remain at any angle between 0 and 90 degrees as needed, achieving tilted trimming. During tilted trimming, the position adjustment component is in tilted trimming mode. This tilted trimming mode not only allows for avoidance of obstacles as needed but also allows the trimmer head to form a larger cutting angle with weeds, improving the efficiency of garden trimming.

[0019] 3. In the position adjustment component provided in the example embodiment of this application, the drive mechanism in the lifting drive component can achieve height adjustment of the first connecting arm and the mowing head through the unfolding and retracting actions of the X-support arm. The X-support arm requires very little width space in the lifting drive component, only requiring a significant amount of length space. The above-mentioned lifting structure allows the lifting drive component to form a narrow cuboid structure, ensuring that the position adjustment component has sufficient unfolded length in the unfolded state without increasing the width of the position adjustment component, effectively reducing the width space occupied by the position adjustment component on the lawnmower frame.

[0020] 4. In the position adjustment assembly provided in the example embodiment of this application, the bottom end of the first end of the bottom connecting plate along its length is connected to the second connecting arm via a second rotating shaft; the side connection position of the top driving platform is fixedly connected to the first connecting arm. This arrangement allows the second connecting arm to extend to its maximum length by using the length of the lifting driving component as the rotating arm during the rotation and unfolding process of the lifting driving component. Furthermore, the fixed connection position of the top driving platform to the first connecting arm reduces the height space required by the first connecting arm and the lifting driving component, thus miniaturizing the position adjustment assembly.

[0021] 5. In the position adjustment assembly provided in the exemplary embodiment of this application, the push rod and the guide rail extend along the length direction of the drive mechanism. Positioning the push rod and guide rail along the length direction of the drive mechanism not only effectively reduces the width and overall size of the drive mechanism, but also allows the drive motor to be positioned at one end of the drive mechanism's length direction. This enables the heavier drive motor to be placed at the second pivot position of the second connecting arm, thereby reducing the driving force required for the second connecting arm to rotate the drive mechanism.

[0022] 6. In the position adjustment assembly provided in the exemplary embodiment of this application, guide rail supports are provided at both ends of the guide rail and are fixedly connected to the lower surface of the top drive platform; the movable end of the first support arm is slidably disposed on the guide rail via a sleeve; the sleeve is also provided with a pulley that is rollably connected to the lower surface of the top drive platform. The sleeve slidably disposed on the guide rail and the pulley that is rollably connected to the top drive platform can stably guide the unfolding and retraction of the X support arm.

[0023] 7. In the position adjustment assembly provided in the exemplary embodiment of this application, the first connecting arm is configured as a flat plate structure and is fixedly connected to the side connection position of the top drive platform on the lifting drive component. The flat plate structure of the first connecting arm can effectively reduce the width space occupied by the position adjustment assembly of the automatic lawnmower when the automatic lawnmower is in the stored state.

[0024] 8. In the position adjustment assembly provided in the example embodiment of this application, the first connecting arm includes a first driving member that drives the first rotating shaft to rotate; the first driving member is a gimbal motor. The gimbal motor can effectively reduce the overall size of the position adjustment assembly, and more importantly, it can miniaturize the first connecting arm that drives the grass trimmer, reduce the probability of positional interference between the first connecting arm and obstructions, and make the grass trimmer more flexible.

[0025] 9. The automatic lawnmower provided in the exemplary embodiment of this application includes a position adjustment component, so the automatic lawnmower has all the advantages of the position adjustment component.

[0026] In addition, a receiving cavity is provided at the outer edge of the lawnmower frame. When the position adjustment component is in the retracted state, the lifting drive component controls the first connecting arm to descend to its lowest position, and the second connecting arm drives the lifting drive component to rotate around the second pivot towards the automatic lawnmower. After the retracted state is completed, the receiving cavity accommodates the first connecting arm, the lifting drive component, and the trimming head. This allows the trimming head to be retracted into the body of the automatic lawnmower through the folding and lifting action of the position adjustment component, thus achieving miniaturization of the position adjustment component.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a three-dimensional structural diagram of the grass trimming head position adjustment component installed in the embodiment of this application; Figure 2 This is a schematic diagram of the connection structure between the drive mechanism and the first connecting arm according to an embodiment of this application; Figure 3 This is an enlarged schematic diagram of the connection structure between the X support arm and the guide rail of the drive mechanism according to the embodiments of this application; Figure 4 This is a three-dimensional structural diagram of the first connecting arm of the flat plate structure according to the embodiments of this application; Figure 5 This is a schematic diagram of the internal structure of the second connecting arm according to an embodiment of this application; Figure 6 This is a schematic diagram of the three-dimensional structure of the mowing head in the cross-cutting mowing mode according to the embodiments of this application; Figure 7 This is a schematic diagram of the three-dimensional structure of the grass trimming head in the vertical cutting and trimming mode according to the embodiments of this application; Figure 8 This is a schematic diagram of the three-dimensional structure of the mowing head in the tilted mowing mode according to the embodiments of this application; Figure 9 This is a top view of the position adjustment component being housed within the receiving cavity of the lawnmower frame according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures: 1. First connecting arm; 2. First rotating shaft; 3. Trimming head; 4. Lifting drive component; 5. Bottom connecting plate; 6. Top drive platform; 7. Drive mechanism; 8. Second connecting arm; 9. Second rotating shaft; 10. X-support arm; 11. Support arm rotating shaft; 12. First support arm; 13. Second support arm; 14. Support arm rotating shaft frame; 15. Connecting end; 16. Push rod; 17. Movable end; 18. Guide rail; 19. Bottom of first end; 20. Side connection position; 21. Drive motor; 22. Pulley; 23. Telescopic positioning rod; 24. First drive component; 25. Gear set; 26. Second drive component; 27. Position adjustment component; 28. Lawn mower frame; 29. ​​Receiving cavity; 30. Sleeve. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted. Furthermore, the drawings are merely illustrative of this application and are not necessarily drawn to scale.

[0031] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples in the accompanying drawings. It is understood that if the device of the icon is flipped so that it is upside down, the component described as "upper" will become the component described as "lower." When a structure is "upper" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0032] The terms “a,” “one,” “the,” and “at least one” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0033] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In addition, the term "multiple" should mean two or more.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Example 1 See Figure 1 The diagram shows a three-dimensional structure of a position adjustment assembly with a mowing head installed. In this embodiment, a position adjustment assembly for an automatic lawnmower is specifically disclosed. The position adjustment assembly includes: The first connecting arm 1 is rotatably connected to the trimmer head 3 via a first rotating shaft 2, and is used to drive the trimmer head 3 to rotate around the first rotating shaft 2 as follows. Figure 6 The horizontal position is used to perform the cross-cutting mowing mode, or rotated to such a position. Figure 7 The vertical position shown is for performing a vertical trimming mode; in the horizontal trimming mode, the cutting part of the trimming head rotates horizontally to cut the weeds along their cross-section. Additionally, since weeds and branches tend to lean naturally, vegetation trimming can also be performed using a vertical trimming mode. In this mode, the cutting part of the trimming head rotates vertically, forming an angle with the weeds to cut them. In the vertical trimming mode, the cutting part of the trimming head can also sweep away weeds and branches from the edge of the yard, thus creating a regular boundary at the edge. In a variant embodiment, such as... Figure 8As shown, the first connecting arm 1 can also drive the trimmer head 3 to rotate so that the angle A between the cutting plane of the trimmer head 3 and the horizontal plane is adjusted to be greater than 0 degrees and less than 90 degrees. The first connecting arm 1 can drive the trimmer head to stop at any angle between 0 and 90 degrees as needed, achieving tilted trimming. When trimming at an angle, the position adjustment component is in tilted trimming mode. This tilted trimming mode not only allows for avoiding obstacles as needed but also allows the trimmer head to form a larger cutting angle with weeds, improving the efficiency of garden trimming. The lifting drive component 4 includes: a bottom connecting plate 5, a top drive platform 6, and a drive mechanism 7 disposed between the bottom connecting plate 5 and the top drive platform 6; the drive mechanism 7 drives the top drive platform 6 to rise and fall to adjust the vertical height of the mowing head 3; the lifting drive component 4 drives the first connecting arm to rise and fall in the vertical direction to adjust the vertical height of the mowing head, so that the mowing head has sufficient vertical space to realize the switching of the above working mode; The second connecting arm 8 is rotatably connected to the bottom connecting plate 5 via the second rotating shaft 9, and is used to drive the lifting drive component 4 to rotate around the second rotating shaft 9 to adjust the horizontal distance of the mowing head 3 relative to the automatic lawnmower.

[0037] In a preferred embodiment, see [reference] Figures 1 to 3 The diagram shows the structure of the drive mechanism. The drive mechanism 7 in the lifting drive component 4 includes: X-support arm 10, such as Figure 3 The X-support arm 10 shown includes a first support arm 12 and a second support arm 13 hinged together via a support arm pivot 11. The unfolding action of the X-support arm 10 lowers the height of the top drive platform 6, thereby reducing the vertical height of the mowing head 3; conversely, the retraction action of the X-support arm 10 raises the height of the top drive platform 6, thereby increasing the vertical height of the mowing head 3. Furthermore, the X-support arm 10 requires very little width space in the lifting drive component 4, only requiring a significant portion of its length. This lifting structure allows the lifting drive component 4 to form a narrow rectangular structure, ensuring sufficient unfolded length for the position adjustment component 27 without increasing its width. When the position adjustment component 27 is retracted into the receiving cavity 29 of the mower frame 28, the width space occupied by the position adjustment component 27 in the mower frame 28 is effectively reduced. The support arm pivot frame 14 is arranged on the bottom connecting plate 5 and the top driving platform 6 respectively; the connecting end 15 of the first support arm 12 is rotatably connected to the support arm pivot frame 14 on the bottom connecting plate 5, and the connecting end 15 of the second support arm 13 is rotatably connected to the support arm pivot frame 14 on the top driving platform 6. Push rod 16 is mounted on the bottom connecting plate 5 and extends horizontally, and is rotatably connected to the movable end 17 of the second support arm 13 to drive the X support arm 10 to unfold or retract; the unfolding and retracting actions of the X support arm 10 can be precisely controlled by the push rod 16. The guide rail 18 is mounted on the top drive platform 6 and guides the movable end 17 of the first support arm 12 to slide horizontally.

[0038] In this preferred embodiment, see the following: Figure 1 A schematic diagram of the connection structure between the position adjustment component and the second connecting arm provided in this embodiment is shown. The bottom 19 of the first end along the length of the bottom connecting plate 5 is connected to the second connecting arm 8 via a second rotating shaft 9; the side connection position 20 of the top drive platform 6 is fixedly connected to the first connecting arm 1. This arrangement allows the second connecting arm 8 to extend by using the length of the lifting drive component 4 as the rotating arm during the rotation and unfolding process, thereby maximizing the extension length of the position adjustment component 27.

[0039] Furthermore, in this preferred embodiment, the push rod 16 and the guide rail 18 extend along the length of the drive mechanism 7; the drive mechanism 7 further includes a drive motor 21 for driving the push rod 16 to extend and retract, and the drive motor 21 is disposed at the bottom 19 of the first end. Distributing the push rod 16 and guide rail 18 along the length of the drive mechanism 7 effectively reduces the width and overall size of the drive mechanism 7. Moreover, distributing the drive motor 21 at one end along the length of the drive mechanism 7 allows for the placement of the heavier drive motor 21 at the second pivot 9 of the second connecting arm 8, thereby reducing the driving force required for the second connecting arm 8 to rotate the drive mechanism 7. Of course, in this embodiment, the drive motor 21 can also be disposed along the length of the bottom connecting plate 5, away from the second pivot 9 of the second connecting arm 8, as needed.

[0040] In a preferred embodiment, such as Figure 3The diagram shows an enlarged view of the connection structure between the X-support arm and the guide rail of the drive mechanism. Guide rail brackets are fixedly connected to the lower surface of the top drive platform 6 at both ends of the guide rail 18. The movable end 17 of the first support arm 12 is slidably mounted on the guide rail 18 via a sleeve 30. A pulley 22 is also mounted on the sleeve 30 and is rolletably connected to the lower surface of the top drive platform 6. The sleeve 30 slidably mounted on the guide rail 18 and the pulley 22 rolletably connected to the top drive platform 6 stably guide the unfolding and retracting movements of the X-support arm 10.

[0041] In a preferred embodiment, the first connecting arm 1 is further equipped with a rotational position sensor for detecting the rotation angle of the trimmer head 3. The rotational position sensor converts the mechanical rotation of the first rotating shaft 2 connected to the trimmer head 3 into an electrical signal, thereby accurately measuring the rotation angle, angular displacement, and rotation state. The rotational position sensor is a magnetic encoder. Of course, in this embodiment, an optical encoder with higher measurement accuracy or a potentiometer-type rotational angle sensor with lower measurement accuracy can also be selected as needed. The rotational position sensor can detect the rotation angle of the trimmer head 3 in real time, thereby controlling the trimmer head 3 to switch between different trimming modes.

[0042] In this preferred embodiment, see the following: Figure 4 The diagram shows a three-dimensional structural schematic of the first connecting arm of the flat plate structure. The first connecting arm 1 is a flat plate structure. The first connecting arm 1 is fixedly connected to the side connection position 20 of the top drive platform 6 on the lifting drive component 4. By setting the first connecting arm 1 as a flat plate structure, the width space occupied by the position adjustment component of the automatic lawnmower can be effectively reduced when the automatic lawnmower is in the retracted state. Of course, this embodiment does not specifically limit the shape, position, and setting position of the first connecting arm 1. The first connecting arm 1 can also be set at the end position in the length direction of the lifting drive component 4 as needed, thereby increasing the extension length of the position adjustment component. Furthermore, the first connecting arm 1 can also be set as a cuboid structure as needed to increase the structural strength of the first connecting arm 1.

[0043] In a preferred embodiment, the first connecting arm 1 includes a first driving component 24 that drives the first rotating shaft 2 to rotate; the first driving component 24 is a gimbal motor. The gimbal motor can effectively reduce the overall size of the position adjustment assembly 27, and more importantly, it allows for miniaturization of the first connecting arm 1 that drives the trimmer head 3, reducing the probability of positional interference between the first connecting arm 1 and obstructions, and making the trimmer head more flexible. Of course, in this embodiment, a common brushless motor can also be selected as the driving motor for the first driving component 24 as needed.

[0044] In this preferred embodiment, see the following: Figure 5The diagram shows the internal structure of the second connecting arm 8. The second connecting arm 8 includes a gear set 25 that drives the second rotating shaft 9 to rotate, and a second driving component 26 that drives the gear set 25 to rotate; the gear set 25 is a bevel gear set mounted on the second rotating shaft 9. The second rotating shaft 9 extends vertically and drives the lifting driving component 4 to rotate around the second rotating shaft 9, thereby causing the lifting driving component 4, the first connecting arm 1, and the mowing head 3 to move horizontally relative to the automatic lawnmower. The second rotating shaft 9 is rotatably connected to a gearbox housing the gear set 25 via bearings at its upper and lower ends.

[0045] Example 2 See Figure 9 The diagram shows the position adjustment component retracted into the receiving cavity of the lawnmower frame. In this embodiment, an automatic lawnmower is disclosed, including: the position adjustment component 27 described in Embodiment 1; and a trimmer head 3 and a lawnmower frame 28. The trimmer head 3 is provided with a cutting section. The second connecting arm 8 is mounted on the lawnmower frame 28; and the lawnmower frame 28 is also provided with a receiving cavity 29 for accommodating the first connecting arm 1, the lifting drive component 4, and the trimmer head 3; the position adjustment component 27 has a retracted state and an extended state relative to the automatic lawnmower in the horizontal direction; in the retracted state, the second connecting arm 8 drives the lifting drive component 4 to rotate around the second rotating shaft 9 toward a direction closer to the automatic lawnmower, and the position adjustment component 27 is retracted into the receiving cavity 29; in the extended state, the second connecting arm 8 drives the lifting drive component 4 to rotate around the second rotating shaft 9 toward a direction away from the automatic lawnmower.

[0046] The specific storage process is as follows: the lifting drive component 4 controls the first connecting arm 1 to descend to its lowest position, and the second connecting arm 8 drives the lifting drive component 4 to rotate around the second rotating shaft 9 towards the direction of the automatic lawnmower, completing the storage state action. The aforementioned accommodating cavity 29 accommodates the first connecting arm 1, the lifting drive component 4, and the trimmer head 3. The trimmer head 3 is stored in the body of the automatic lawnmower through the folding and lifting action of the aforementioned position adjustment component 27, thereby achieving miniaturization of the position adjustment component 27.

[0047] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the embodiments thereof. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. A position adjustment assembly for an automatic lawnmower, characterized in that, include: The first connecting arm (1) is rotatably connected to the grass-cutting head (3) via the first rotating shaft (2), and is used to drive the grass-cutting head (3) to rotate around the first rotating shaft (2) to a horizontal position to perform the horizontal grass-cutting mode, or to rotate to a vertical position to perform the vertical trimming mode; The lifting drive component (4) includes: a bottom connecting plate (5), a top drive platform (6), and a drive mechanism (7) disposed between the bottom connecting plate (5) and the top drive platform (6); the drive mechanism (7) drives the top drive platform (6) to lift and lower to adjust the vertical height of the grass trimmer (3); The second connecting arm (8) is rotatably connected to the bottom connecting plate (5) via the second rotating shaft (9) and is used to drive the lifting drive component (4) to rotate around the second rotating shaft (9) to adjust the horizontal distance of the mowing head (3) relative to the automatic lawnmower.

2. The position adjustment component according to claim 1, characterized in that, The drive mechanism (7) includes: X-support arm (10), the X-support arm (10) includes: a first support arm (12) and a second support arm (13) hinged together by a support arm pivot (11). The support arm pivot frame (14) is arranged on the bottom connecting plate (5) and the top driving platform (6); the connecting end (15) of the first support arm (12) is rotatably connected to the support arm pivot frame (14) on the bottom connecting plate (5), and the connecting end (15) of the second support arm (13) is rotatably connected to the support arm pivot frame (14) on the top driving platform (6); A push rod (16) is mounted on the bottom connecting plate (5) and extends horizontally, and is rotatably connected to the movable end (17) of the second support arm (13) to drive the X support arm (10) to unfold or retract. The guide rail (18) is mounted on the top drive platform (6) and guides the movable end (17) of the first support arm (12) to slide horizontally.

3. The position adjustment component according to claim 2, characterized in that, The bottom end (19) of the bottom connecting plate (5) in the length direction is connected to the second connecting arm (8) via the second rotating shaft (9); the side connection position (20) of the top driving platform (6) is fixedly connected to the first connecting arm (1).

4. The position adjustment component according to claim 3, characterized in that, The push rod (16) and the guide rail (18) extend along the length of the drive mechanism (7); the drive mechanism (7) further includes a drive motor (21) for driving the push rod (16) to extend and retract, and the drive motor (21) is located at the bottom (19) of the first end.

5. The position adjustment component according to claim 2, characterized in that, The guide rail (18) is provided with guide rail brackets at both ends, which are fixedly connected to the lower surface of the top drive platform (6); the movable end (17) of the first support arm (12) is slidably disposed on the guide rail (18) through the sleeve (30); the sleeve (30) is also provided with a pulley (22) that is rollably connected to the lower surface of the top drive platform (6). The bottom connecting plate (5) is also provided with a telescopic positioning rod (23) connected to the first connecting arm (1), and the telescopic positioning rod (23) is used to guide the first connecting arm (1) to rise and fall.

6. The position adjustment component according to claim 1, characterized in that, The first connecting arm (1) is also provided with a rotation position sensor for detecting the rotation angle of the grass trimmer (3).

7. The position adjustment component according to any one of claims 1 to 6, characterized in that, The first connecting arm (1) is a flat plate structure and is fixedly connected to the side connection position (20) of the top drive platform (6) on the lifting drive component (4).

8. The position adjustment assembly according to any one of claims 1 to 7, characterized in that, The first connecting arm (1) includes a first driving member (24) that drives the first rotating shaft (2) to rotate; the first driving member (24) is a gimbal motor.

9. The position adjustment assembly according to any one of claims 1 to 8, characterized in that, The second connecting arm (8) includes a gear set (25) for driving the second rotating shaft (9) to rotate, and a second driving member (26) for driving the gear set (25) to rotate; the gear set (25) is a bevel gear set mounted on the second rotating shaft (9); The second rotating shaft (9) extends vertically and drives the lifting drive component (4) to rotate around the second rotating shaft (9) so that the lifting drive component (4), the first connecting arm (1) and the mowing head (3) move horizontally relative to the automatic lawnmower.

10. An automatic lawnmower, characterized in that, include: The position adjustment component (27) according to any one of claims 1 to 9; and, Grass trimmer (3), wherein a cutting part is provided on the grass trimmer (3); A lawnmower frame (28) is provided, on which the second connecting arm (8) is mounted; and the lawnmower frame (28) is also provided with a receiving cavity (29) for accommodating the first connecting arm (1), the lifting drive component (4) and the mowing head (3); the position adjustment component (27) has a retracted state and an extended state in the horizontal direction relative to the automatic lawnmower; in the retracted state, the second connecting arm (8) drives the lifting drive component (4) to rotate around the second rotating shaft (9) toward the direction closer to the automatic lawnmower, and the position adjustment component (27) is retracted into the receiving cavity (29); in the extended state, the second connecting arm (8) drives the lifting drive component (4) to rotate around the second rotating shaft (9) toward the direction away from the automatic lawnmower.

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