Smart lawn mower

Abstract

A smart lawn mower. A height adjustment member (61) of the smart lawn mower comprises a first cam (63) and a second cam (64) connected below the first cam (63). During movement of the height adjustment member (61), a lifting member (62) sequentially comes into contact with the first cam (63) and the second cam (64) in a preset order and moves up and down, so as to drive a cutting assembly (3) to move up and down. In the smart lawn mower, by means of the first cam and the second cam which are vertically stacked, the lifting member can obtain an additional vertical movement stroke during height adjustment, thereby expanding the cutting height adjustment range of the smart lawn mower.

Description

Smart lawnmower Technical Field

[0001] This invention relates to the field of garden tool technology, and in particular to an intelligent lawnmower with a wide range of adjustable cutting height. Background Technology

[0002] Smart lawnmowers are common gardening tools used for mowing various types of lawns. To meet the different mowing height requirements of various users, smart lawnmowers typically have a height adjustment device to adjust the cutting height. The cutting height refers to the height of the cutting component from the ground. Known smart lawnmower height adjustment devices use a parallel linkage structure to rotatably connect the cutting component and the housing, and a cam structure drives the parallel linkage structure or the cutting component to move in the height direction to achieve height adjustment. In this way, not only can the cutting height of the smart lawnmower be adjusted, but the mobility of the smart lawnmower can also be improved.

[0003] However, the above-mentioned height adjustment device has the following problems: the up and down movement stroke of the cam structure is short, the cutting height adjustment range is small, and it cannot fully meet the needs of different regions.

[0004] Therefore, it is indeed necessary to provide an improved intelligent lawnmower to overcome the shortcomings of existing technology. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an intelligent lawnmower with a wide range of adjustable cutting height.

[0006] The present invention solves the problems of the prior art by adopting the following technical solution: an intelligent lawnmower, comprising: a housing; a cutting assembly installed in the housing; a connecting rod assembly connected between the cutting assembly and the housing; a height adjustment assembly, including a height adjustment component and a lifting component driven by the height adjustment component to move the cutting assembly up and down; the height adjustment component includes a first cam and a second cam connected below the first cam, the first cam including a first spiral portion supporting the lifting component, the second cam including a second spiral portion connected below the first spiral portion, and during the movement of the height adjustment component, the lifting component moves from one of the first spiral portion and the second spiral portion to the other of the first spiral portion and the second spiral portion.

[0007] Furthermore, the rotation angle of both the first spiral portion and the second spiral portion is no greater than 360 degrees.

[0008] Furthermore, the first spiral portion includes a first supporting surface and a first mating surface disposed at one end of the first supporting surface, and the second spiral portion includes a second supporting surface and a second mating surface disposed at one end of the second supporting surface. The first mating surface is connected to the second mating surface. Both the first supporting surface and the second supporting surface are curved surfaces with varying heights, and at least one of the first mating surface and the second mating surface is a straight surface.

[0009] Furthermore, both the first mating surface and the second mating surface are straight and parallel to the horizontal plane.

[0010] Furthermore, the first support surface and the second support surface have the same helix angle.

[0011] Furthermore, in the height direction of the intelligent lawnmower, the first mating surface is located at the lowest end of the first supporting surface, and the second mating surface is located at the highest end of the second supporting surface.

[0012] Furthermore, the first spiral portion includes a first supporting surface and a first end face disposed at the uppermost end of the first supporting surface, and the second spiral portion includes a second supporting surface and a second end face disposed at the lowermost end of the second supporting surface. Both the first supporting surface and the second supporting surface are curved surfaces with varying heights, and at least one of the first end face and the second end face is a straight surface.

[0013] Furthermore, both the first end face and the second end face are straight and parallel to the horizontal plane.

[0014] Furthermore, the first cam also includes a first camshaft supporting the first helical portion and a first stop portion connected to the first helical portion. The first helical portion surrounds the first camshaft in the circumferential direction, and the first stop portion extends upward from the first helical portion. In the radial direction of the first camshaft, the lifting member is located between the first camshaft and the first stop portion.

[0015] Furthermore, the second cam also includes a second camshaft supporting the second helical portion and a second stop portion connected to the second helical portion. The second helical portion surrounds the second camshaft in the circumferential direction, and the second stop portion extends upward from the second helical portion. In the radial direction of the second camshaft, the lifting member is located between the second camshaft and the second stop portion.

[0016] Furthermore, the first stop portion is connected to the second stop portion.

[0017] Furthermore, the extending direction of the first stop portion is parallel to the extending direction of the second stop portion.

[0018] Furthermore, the first cam also includes a first camshaft supporting the first helical portion, the first helical portion surrounding the first camshaft in the circumferential direction; the second cam also includes a second camshaft supporting the second helical portion, the second helical portion surrounding the second camshaft in the circumferential direction; and the first camshaft is connected above the second camshaft.

[0019] Furthermore, the centerline of the first camshaft is collinear with the centerline of the second camshaft.

[0020] Furthermore, the first camshaft includes a first tube and a first connecting portion disposed on the first tube, and the second camshaft includes a second tube and a second connecting portion disposed on the second tube, wherein the first connecting portion is connected to the second connecting portion.

[0021] Furthermore, the first tube is sleeved on the second tube, and the intelligent lawnmower also includes a locking component, which is connected to the first connecting part and the second connecting part respectively.

[0022] Furthermore, the cutting assembly includes a cutting element, a cutting motor connected to and driving the cutting element, and a motor cylinder for supporting the cutting motor. The linkage assembly includes a first linkage and a second linkage. In the left-right direction of the intelligent lawnmower, the first linkage and the second linkage are respectively connected to both sides of the motor cylinder.

[0023] Furthermore, the linkage assembly also includes a first crossbeam connected between the first link and the second link, and in the front-rear direction of the intelligent lawnmower, the height adjustment component is disposed between the first crossbeam and the motor cylinder.

[0024] Furthermore, the first crossbeam includes a first connecting segment connected to the first connecting rod, a second connecting segment connected to the second connecting rod, and a first clearance segment connected between the first connecting segment and the second connecting segment. The first clearance segment is located away from the height adjustment component compared to the first connecting segment and the second connecting segment.

[0025] Furthermore, the linkage assembly also includes a second crossbeam located behind the height adjustment component. The second crossbeam includes a third connecting section connected to the first linkage, a fourth connecting section connected to the second linkage, and a second clearance section connected between the third connecting section and the fourth connecting section. The second clearance section is located above the motor cylinder.

[0026] Compared with the prior art, the present invention has the following beneficial effects: The height adjustment component of the intelligent lawnmower includes a first cam and a second cam connected below the first cam. During the movement of the height adjustment component, the lifting component contacts the first cam and the second cam in a preset order and moves up and down, thereby driving the cutting component to move up and down. Thus, through the stacked first cam and second cam, the lifting component can obtain additional up and down movement stroke during the height adjustment process, thereby expanding the cutting height adjustment range of the intelligent lawnmower. Attached Figure Description

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0028] Figure 1 is a schematic diagram of the overall structure of the intelligent lawnmower in a preferred embodiment of the present invention;

[0029] Figure 2 is a cross-sectional schematic diagram of the intelligent lawnmower shown in Figure 1;

[0030] Figure 3 is a partial structural diagram of the height adjustment component and cutting component of the intelligent lawnmower shown in Figure 1;

[0031] Figure 4 is a partial cross-sectional view of the height adjustment component and cutting component of the intelligent lawnmower shown in Figure 3.

[0032] Figure 5 is a schematic diagram of the height adjustment component of the intelligent lawnmower shown in Figure 1. Detailed Implementation

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0034] Please refer to Figures 1 to 5, which show an embodiment of the intelligent lawnmower 100 of the present invention. It moves and works within the working area and includes a housing 1, a walking module 2 for supporting the movement of the housing 1, a cutting component 3 disposed at the bottom of the housing 1, a control module (not shown) installed inside the housing 1 for controlling the automatic operation of the walking module 2 and the automatic operation of the cutting component 3, a human-machine system disposed on the outer surface of the housing 1 for user operation, and an energy module 4 for powering the intelligent lawnmower 100.

[0035] The housing 1 includes a base 11, an upper cover 12 connected to the base 11 and defining a first chamber, and a decorative cover 13 connected to the upper cover 12 and defining a second chamber. Specifically, the base 11 is used to install functional modules such as the walking module 2, the cutting assembly 3, the control module, and the energy module 4; while the upper cover 12 is configured to at least partially cover the base 11 and is connected to the base 11 to form the first chamber, in which the control module is housed. In one embodiment of the present invention, the upper cover 12 is sealed to the base 11, and the first chamber is sealed and isolated from the external environment; the decorative cover 13 mainly serves an aesthetic and decorative purpose, and is connected to the upper cover 12 and defines the second chamber, in which the human-machine interface and other modules for user operation of the intelligent lawnmower 100 are located. It should be noted that the decorative cover 13 being connected to the upper cover 12 and defining the second chamber is only one optional embodiment of the present invention. In other embodiments, the decorative cover 13 may also be connected to the base 11, or simultaneously connected to both the base 11 and the upper cover 12.

[0036] The walking module 2 is used to drive the intelligent lawnmower 100 to move within the working area, and includes drive wheels 21 and auxiliary wheels 22 mounted on the housing 1. Specifically, there are two drive wheels 21, each connected to a corresponding walking motor (not shown). The walking motor drives the drive wheels 21 to rotate, thereby enabling the intelligent lawnmower 100 to move automatically. The auxiliary wheels 22 mainly serve as auxiliary supports. There are one or two auxiliary wheels 22, located at the front of the intelligent lawnmower 100. The auxiliary wheels 22 are not connected to the walking motor, but they are driven to roll while supporting the intelligent lawnmower 100 to move. With the above structural arrangement, the intelligent lawnmower 100 can be controlled by the control module to move and turn flexibly on the working surface. During normal walking, the two walking motors output the same speed, directly driving or indirectly driving the intelligent lawnmower 100 through a transmission structure such as gears or belts, while the auxiliary wheel 22 also rolls. When turning, the two walking motors output different speeds, and the intelligent lawnmower 100 will turn towards the side of the driving wheel 21 with the lower speed or towards the side of the driving wheel 21 with the direction of reversing.

[0037] The control module is used to control the automatic walking and operation of the intelligent lawnmower 100. The functions it performs include controlling the cutting component 3 to start or stop, generating a walking path and controlling the walking module 2 to follow it, receiving environmental signals detected by the intelligent lawnmower 100, judging the power of the energy module 4 and controlling the intelligent lawnmower 100 to return to the docking station for automatic charging, etc.

[0038] For ease of understanding, in this invention, the horizontal working surface that the intelligent lawnmower 100 travels through during the cutting operation is used as a reference object, the plane parallel to the horizontal working surface is used as the horizontal plane, the direction perpendicular to the horizontal working surface is used as the height direction of the intelligent lawnmower 100, the forward and backward directions of the intelligent lawnmower 100 are used as the front-back direction of the intelligent lawnmower 100, and the left-right direction of the intelligent lawnmower 100 is perpendicular to the front-back direction of the intelligent lawnmower 100.

[0039] The cutting assembly 3 includes a cutting element 31 for cutting turf, a cutting motor 33 connected to and driving the cutting element 31, and a motor cylinder 32 for supporting the cutting motor 33. Specifically, the cutting motor 33 is mounted on the base of the housing 1 and is electrically connected to the control module. The control module can control the start and stop of the cutting motor 33 and adjust its speed. The intelligent lawnmower 100 also includes a linkage assembly 5 that supports the cutting assembly 3 and drives it to move up and down. The linkage assembly 5 includes a parallel linkage movably connected between the motor cylinder 32 and the housing 1. Thus, when the intelligent lawnmower 100 encounters obstacles such as stones or low shrubs during its movement, the cutting element 31 will be pushed by the obstacles and move upward with the help of the parallel linkage. This avoids damage to the cutting element 31 from a hard collision with the obstacle and improves the mobility of the intelligent lawnmower 100. It should be noted that the cutting element 31 can be a cutting disc and multiple cutting blades mounted on the cutting disc, or it can be a single cutting blade; there is no limitation here.

[0040] The intelligent lawnmower 100 also includes a height adjustment component 6 for adjusting the cutting height, comprising a height adjustment element 61 and a lifting element 62 disposed on the cutting component 3 or the linkage assembly 5. The lifting element 62 is driven by the height adjustment element 61 to move up and down, thereby driving the cutting component 3 to move up and down. Specifically, the height adjustment element 61 is constructed as a spatial cam, and the lifting element 62 is constructed as a protrusion disposed on the motor cylinder 32. The intelligent lawnmower 100 also has a height adjustment motor or a manual knob (not shown). The spatial cam is connected to the aforementioned height adjustment motor or manual knob. When the user needs to adjust the cutting height, he / she can operate through the human-machine interface or manually rotate the knob. At this time, the spatial cam is actuated and rotates. The protrusion connected to the spatial cam moves along the outer surface of the spatial cam, which changes in height, and drives the motor cylinder 32 to move in the height direction. The cutting unit 31 also moves in the height direction accordingly, thereby realizing the adjustment of the cutting height of the intelligent lawnmower 100.

[0041] The height adjustment component 61 includes a first cam 63 and a second cam 64 connected below the first cam 63. The first cam 63 includes a first helical portion 632 supporting the lifting component 62, and the second cam 64 includes a second helical portion 642 supporting the lifting component 62. The second helical portion 642 is connected below the first helical portion 632. During the movement of the height adjustment component 61, the lifting component 62 moves from one of the first helical portion 632 and the second helical portion 642 to the other of the first helical portion 632 and the second helical portion 642. Specifically, when the user performs the cutting height adjustment operation of the intelligent lawnmower 100, the user can drive the height adjustment component 61 to rotate. At this time, after the lifting component 62 rotates along the first helical portion 632 of the first cam 63 to the limit position, it can also move to the second cam 64 and continue to rotate along the second helical portion 642 of the second cam 64.

[0042] Thus, on the one hand, by stacking the first cam 63 and the second cam 64, the lifting member 62 can obtain additional vertical movement stroke during the height adjustment process, thereby expanding the cutting height adjustment range of the intelligent lawnmower 100; on the other hand, compared with increasing the helix angle or increasing the diameter of the helix surface by a single spatial cam to obtain a larger height adjustment stroke, obtaining a larger height adjustment stroke by stacking the first cam 63 and the second cam 64 is simpler in process, and the overall volume of the height adjustment member 61 is small, resulting in high space utilization and a compact structure for the intelligent lawnmower 100; at the same time, if the helix angle is increased by a single spatial cam to obtain a larger height adjustment stroke, there is a problem of difficulty in demolding in the process, and even if demolding can be successful, it is difficult to obtain a smooth helix surface. Therefore, in this embodiment, the rotation angle of the first helix part 632 and the rotation angle of the second helix part 642 are both no greater than 360 degrees, and a larger cutting height adjustment range is obtained by stacking them, thereby further simplifying the process.

[0043] It should be noted that the lifting component 62 contacts the first cam 63 or the second cam 64 in a preset order. The preset order varies depending on the height adjustment logic of the intelligent lawnmower 100. For example, if the height adjustment component 61 moves to drive the lifting component 62 to the lowest position before each height adjustment operation, the lifting component 62 will always contact the second cam 64 first during the movement of the height adjustment component 61, and gradually move to contact the first cam 63. If the height adjustment component 61 moves to drive the lifting component 62 to the highest position before each height adjustment operation, the lifting component 62 will always contact the first cam 63 first during the movement of the height adjustment component 61, and gradually move to contact the second cam 64.

[0044] A straight surface is provided at the connection between the first spiral portion 632 and the second spiral portion 642. Specifically, the first spiral portion 632 includes a first supporting surface 633 and a first mating surface 634 disposed at one end of the first supporting surface 633. The second spiral portion 642 includes a second supporting surface 643 and a second mating surface 644 disposed at one end of the second supporting surface 643. Both the first supporting surface 633 and the second supporting surface 643 are curved surfaces with varying heights, and the spiral angles of the first supporting surface 633 and the second supporting surface 643 are the same. The first mating surface 634 is connected to the second mating surface 644. Thus, on the one hand, the spiral-shaped curved surface supports the lifting member 62, and the supporting surfaces of the first cam 63 and the second cam 62 are interconnected, so that during the adjustment of the cutting height of the intelligent lawnmower 100, the lifting member 62 can always maintain contact with the first spiral part 632 or the second spiral part 642, and the height adjustment action of the height adjustment component 6 is smooth and continuous without producing abnormal noise; on the other hand, the spiral angles of the first supporting surface 633 and the second supporting surface 643 are the same, so that the cutting height adjustment range obtained by the lifting member 62 moving along the first spiral part 632 is the same as the cutting height adjustment range obtained by the lifting member 62 moving along the second spiral part 642, thereby making the movement of the lifting member 62 stable and uniform when adjusting the cutting height, and improving the structural stability of the height adjustment component 6.

[0045] Among them, at least one of the first mating surface 634 and the second mating surface 644 is a straight surface and is set parallel to the horizontal plane. In this embodiment, in the height direction of the intelligent lawnmower 100, the first mating surface 634 is located at the lowest end of the first supporting surface 633, and the second mating surface 644 is located at the highest end of the second supporting surface 643. Both the first mating surface 634 and the second mating surface 644 are straight surfaces and are set parallel to the horizontal plane. In this way, on the one hand, by mating directly, the connection between the first cam 63 and the second cam 64 is made to fit snugly and be on the same plane. During the process of adjusting the cutting height of the intelligent lawnmower 100, the movement resistance of the lifting member 62 during the movement from the first cam 63 to the second cam 64 is reduced, further improving the user's operating experience of adjusting the cutting height of the intelligent lawnmower through the height adjustment member 61. On the other hand, compared with the first mating surface 634 and the second mating surface 644 mating through an arc surface, the straight surface mating reduces the installation difficulty of the first cam 63 and the second cam 64, and also avoids the situation where the first mating surface 634 and the second mating surface 644 cannot fit snugly after the first cam 63 and the second cam 64 are connected due to the difference in product molding.

[0046] It should be noted that the fact that both the first mating surface 634 and the second mating surface 644 are straight is one embodiment of the present invention. In other embodiments, one of the first mating surface 634 and the second mating surface 644 is a straight surface and the other is a curved surface. This can also achieve a close connection between the first cam 63 and the second cam 64, and can also reduce the movement resistance of the lifting member 62 during the process of moving from the first cam 63 to the second cam 64 to a certain extent.

[0047] The first spiral portion 632 further includes a first end face 636 disposed at the uppermost end of the first supporting surface 633, and the second spiral portion 642 further includes a second end face 646 disposed at the lowermost end of the second supporting surface 643. At least one of the first end face 636 and the second end face 646 is a straight surface. Specifically, the first end face 636 and the second end face 646 correspond to the two endpoints of the cutting height adjustment range, namely the highest cutting height and the lowest cutting height. In this embodiment, both the first end face 636 and the second end face 646 are set as straight surfaces and parallel to the horizontal plane.

[0048] Therefore, on the one hand, the highest and lowest cutting heights are the most frequently used by users, meaning that the lifting component 62 will be located at the first end face 636 or the second end face 646 for a long time. The horizontally set first end face 636 and second end face 646 can stably support the lifting component 62, thus ensuring the structural stability of the height adjustment structure 6. On the other hand, according to the above height adjustment logic, when adjusting the cutting height, the lifting component 62 will first move to the first end face 636 or the second end face 646 at the highest or lowest position to reset, and then move to the position of the required cutting height. Compared with the curved surface, the horizontally set first end face 636 and second end face 646 make the number of rotations of the height adjustment motor required for the lifting component 62 to move to the first end face 636 or the second end face 646 more stable and accurate, avoiding the height adjustment motor being in a stalled state for a long time and affecting the service life of the height adjustment motor. It should be noted that the fact that both the first end face 636 and the second end face 646 are straight is only one embodiment of the present invention. In other embodiments, depending on the different height adjustment logic, one of the first end face 636 and the second end face 646 can be a straight surface and the other can be a curved surface.

[0049] The first cam 63 also includes a first camshaft 631 supporting the first helical portion 632 and a first stop portion 635 connected to the first helical portion 632. The first helical portion 632 surrounds the first camshaft 631 in the circumferential direction, and the first stop portion 635 extends upward from the first helical portion 632. In the radial direction of the first camshaft 631, the lifting member 62 is located between the first camshaft 631 and the first stop portion 635. Thus, during the height adjustment operation of the intelligent lawnmower 100, the first stop portion 635 prevents the lifting member 62 from dislodging from the first cam 63, improving the structural stability of the height adjustment assembly 6.

[0050] The second cam 64 also includes a second camshaft 641 supporting the second helical portion 642 and a second stop portion 645 connected to the second helical portion 642. The second helical portion 642 surrounds the second camshaft 641 in the circumferential direction, and the second stop portion 645 extends upward from the second helical portion 642. In the radial direction of the second camshaft 641, the lifting member 62 is located between the second camshaft 641 and the second stop portion 645. Thus, during the height adjustment operation of the intelligent lawnmower 100, the second stop portion 645 prevents the lifting member 62 from dislodging from the second cam 64, improving the structural stability of the height adjustment assembly 6.

[0051] Furthermore, the first stop 635 is connected to the second stop 645, and the extending direction of the first stop 635 is parallel to the extending direction of the second stop 645. Thus, on the one hand, the cooperation between the first stop 635 and the second stop 645 ensures that during the height adjustment operation of the intelligent lawnmower 100, the lifting member 62 will not detach from the height adjustment member 61 when moving between the first cam 63 and the second cam 64, improving the structural stability of the height adjustment assembly 6; on the other hand, the parallel extending direction of the first stop 635 to the second stop 645 facilitates the interconnection between the first stop 635 and the second stop 645, simplifying the structure of the first cam 63 and the second cam 64.

[0052] The first camshaft 631 is connected above the second camshaft 641, and the center lines of the first camshaft 631 and the second camshaft 641 are collinear. Thus, when the first cam 63 and the second cam 64 are connected, the first cam 63 and the second cam 64 of the height adjustment component 61 will rotate around the same axis of rotation when the cutting height of the intelligent lawnmower 100 is adjusted. Compared with the staggered center lines of the first camshaft 631 and the second camshaft 641, the space occupied by the movement of the height adjustment component 61 in the front-back direction of the intelligent lawnmower 100 is reduced, and the structural stability of the height adjustment component 6 of the intelligent lawnmower 100 is improved.

[0053] Furthermore, the first camshaft 631 includes a first tube 6311 and a first connecting portion 6312 disposed on the first tube 6311, and the second camshaft 641 includes a second tube 6411 and a second connecting portion 6412 disposed on the second tube 6411, wherein the first connecting portion 6312 is connected to the second connecting portion 6412. Specifically, both the first tube 6311 and the second tube 6411 are constructed as hollow circular tubes, with the first tube 6311 fitted onto the second tube 6411. The first connecting part 6312 extends inward from the inner wall of the first tube 6311 to form a through hole, and the second connecting part 6412 extends outward from the outer wall of the second tube 6411 to form a through hole. The intelligent lawnmower 100 also includes a locking member 7, which is constructed as a screw in this embodiment. The screw is connected to the first connecting part 6312 and the second connecting part 6412 respectively. Thus, when installing the first cam 63 and the second cam 64, it is only necessary to fit the first tube 6311 onto the outside of the second tube 6412 and then tighten the screw to lock the first cam 63 and the second cam 64. This simplifies the assembly difficulty of the first cam 63 and the second cam 64 and improves the assembly efficiency, while also improving the structural stability of the first cam 63 and the second cam 64 after installation.

[0054] It should be noted that the method of connecting the first connecting part 6312 and the second connecting part 6412 with the locking member 7 to fix the first cam 63 and the second cam 64 is only one embodiment of the present invention. In other embodiments, the first connecting part 6312 and the second connecting part 6412 may also include a hook structure. In this way, when installing the first cam 63 and the second cam 64, it is only necessary to put the first tube 6311 on the outside of the second tube 6411 and push the first tube 6311 relative to the second tube 6411 until the first connecting part 6312 and the second connecting part 6412 are connected, thereby realizing quick release between the first cam 63 and the second cam 64, further simplifying the assembly difficulty of the first cam 63 and the second cam 64, and improving the assembly efficiency.

[0055] The linkage assembly 5 includes parallel links, which include a first link 51, a second link 52, and a first crossbeam 53 connecting the first link 51 and the second link 52. In the left-right direction of the intelligent lawnmower 100, the first link 51 and the second link 52 are respectively connected to both sides of the motor barrel 32. In the front-back direction of the intelligent lawnmower 100, the height adjustment component 61 is disposed between the first crossbeam 53 and the motor barrel 32. Specifically, the stacked first cam 63 and the second cam 64 are disposed on the side of the motor barrel 32 near the linkage assembly 5 and are located between the motor barrel 32 and the first crossbeam 53. In this way, while ensuring a larger range of cutting height adjustment, the structure of the intelligent lawnmower 100 in the front-back direction is further made compact. Furthermore, the first crossbeam 53 includes a first connecting section 531 connected to the first connecting rod 51, a second connecting section 532 connected to the second connecting rod 52, and a first clearance section 533 connecting the first connecting section 531 and the second connecting section 532. Compared to the first connecting section 531 and the second connecting section 532, the first clearance section 533 is located away from the height adjustment member 61. Specifically, the first connecting section 531 and the second connecting section 532 located at both ends in the longitudinal direction of the first crossbeam 53 are respectively connected to the first connecting rod 51 and the second connecting rod 52, while the first clearance section 533 located in the middle region in the longitudinal direction of the first crossbeam 53 bends forward to avoid the aforementioned first cam 63 and second cam 64. Thus, while ensuring that the first crossbeam 53 does not interfere with the rotational movement of the height adjustment component 61, by moving the connection between the first crossbeam 53 and the first connecting rod 51 and the second connecting rod 52 toward the height adjustment component 61, the first crossbeam 53 does not need to occupy additional space in the front-back direction of the intelligent lawnmower 100, thereby further achieving a compact structure in the front-back direction of the intelligent lawnmower 100.

[0056] The linkage assembly 5 also includes a second crossbeam 54 located behind the height adjustment member 61. The second crossbeam 54 includes a third connecting section 541 connected to the first connecting rod 51, a fourth connecting section 542 connected to the second connecting rod 52, and a second clearance section 543 connected between the third connecting section 541 and the fourth connecting section 542. The second clearance section 543 is located above the motor cylinder 32. Specifically, the third connecting section 541 and the fourth connecting section 542 located at both ends in the longitudinal direction of the second crossbeam 54 are respectively connected to the first connecting rod 51 and the second connecting rod 52, while the second clearance section 543 located in the middle region in the longitudinal direction of the second crossbeam 54 bends upward to avoid the aforementioned first cam 63, second cam 64 and motor cylinder 32.

[0057] Thus, on the one hand, while ensuring that the second crossbeam 54 does not interfere with the rotational movement of the height adjustment component 61 and the movement of the motor cylinder 32 in the height direction, by moving the connection between the second crossbeam 54 and the first connecting rod 51 and the second connecting rod 52 towards the motor cylinder 32, and bending the second clearance section 543 upward, the second crossbeam 54 does not need to occupy additional space in the front-back direction of the intelligent lawnmower 100, thereby further achieving a compact structure in the front-back direction of the intelligent lawnmower 100; on the other hand, the first crossbeam 53 is set at one end of the parallel connecting rod near the housing 1 of the intelligent lawnmower 100, while the second crossbeam 54 is set at one end of the parallel connecting rod near the motor cylinder 32, and the first crossbeam 53 and the second crossbeam 54 cooperate to improve the structural strength of the connecting rod assembly 5.

[0058] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A smart lawnmower, comprising: case; The cutting assembly is mounted on the housing; A connecting rod assembly connects the cutting assembly and the housing; The height adjustment assembly includes a height adjustment component and a lifting component driven by the height adjustment component to move the cutting assembly up and down; The feature is that the height adjustment component includes a first cam and a second cam connected below the first cam. The first cam includes a first spiral portion that supports the lifting component, and the second cam includes a second spiral portion connected below the first spiral portion. During the movement of the height adjustment component, the lifting component moves from one of the first spiral portion and the second spiral portion to the other of the first spiral portion and the second spiral portion.

2. The intelligent lawnmower according to claim 1, characterized in that: The rotation angle of the first spiral part and the rotation angle of the second spiral part are both no greater than 360 degrees.

3. The intelligent lawnmower according to claim 1, characterized in that: The first spiral portion includes a first supporting surface and a first mating surface disposed at one end of the first supporting surface. The second spiral portion includes a second supporting surface and a second mating surface disposed at one end of the second supporting surface. The first mating surface and the second mating surface are connected. Both the first supporting surface and the second supporting surface are curved surfaces with varying heights. Both the first mating surface and the second mating surface are straight surfaces and are disposed parallel to the horizontal plane.

4. The intelligent lawnmower according to claim 3, characterized in that: The first support surface and the second support surface have the same helix angle.

5. The intelligent lawnmower according to claim 1, characterized in that: The first spiral portion includes a first supporting surface and a first end face disposed at the uppermost end of the first supporting surface. The second spiral portion includes a second supporting surface and a second end face disposed at the lowermost end of the second supporting surface. Both the first supporting surface and the second supporting surface are curved surfaces with varying heights. At least one of the first end face and the second end face is a straight surface.

6. The intelligent lawnmower according to claim 5, characterized in that: Both the first end face and the second end face are straight and parallel to the horizontal plane.

7. The intelligent lawnmower according to claim 1, characterized in that: The first cam also includes a first camshaft supporting the first helical portion and a first stop portion connected to the first helical portion. The first helical portion surrounds the first camshaft in the circumferential direction, and the first stop portion extends upward from the first helical portion. In the radial direction of the first camshaft, the lifting member is located between the first camshaft and the first stop portion.

8. The intelligent lawnmower according to claim 7, characterized in that: The second cam also includes a second camshaft supporting the second helical portion and a second stop portion connected to the second helical portion. The second helical portion surrounds the second camshaft in the circumferential direction, and the second stop portion extends upward from the second helical portion. In the radial direction of the second camshaft, the lifting member is located between the second camshaft and the second stop portion.

9. The intelligent lawnmower according to claim 1, characterized in that: The cutting assembly includes a cutting element, a cutting motor connected to and driving the cutting element, and a motor cylinder for supporting the cutting motor. The linkage assembly includes a first linkage and a second linkage. In the left-right direction of the intelligent lawnmower, the first linkage and the second linkage are respectively connected to both sides of the motor cylinder.

10. The intelligent lawnmower according to claim 9, characterized in that: The linkage assembly further includes a first crossbeam connected between the first link and the second link. In the front-rear direction of the intelligent lawnmower, the height adjustment component is disposed between the first crossbeam and the motor cylinder. The first crossbeam includes a first connecting section connected to the first link, a second connecting section connected to the second link, and a first clearance section connected between the first connecting section and the second connecting section. The first clearance section is disposed away from the height adjustment component compared to the first connecting section and the second connecting section.

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