Adjustable mowing mechanism and mowing robot

Abstract

The embodiment of the application provides a mowing mechanism and a mowing robot, and belongs to the technical field of mowing equipment. The mowing mechanism comprises a base, a mowing assembly, a connecting rod assembly and an adjusting assembly. The base is internally provided with a mounting shaft which is rotatable. The mowing assembly is used for providing a cutting action on grass. The connecting rod assembly is connected to the mowing assembly and the base. The connecting rod assembly comprises a first connecting rod plate and a second connecting rod plate. One end of the first connecting rod plate is connected to the mounting shaft, and the other end is hingedly connected to the mowing assembly. One end of the second connecting rod plate is hingedly connected to the mounting shaft, and the other end is hingedly connected to the mowing assembly. The adjusting assembly is arranged on the base. The adjusting assembly drives the first connecting rod plate to rotate, so as to adjust the height of the mowing assembly. The first connecting rod plate is sleeved on the mounting shaft, so that the first connecting rod plate can rotate upward relative to the mounting shaft. The mowing mechanism can adjust the height of the mowing assembly. When the mowing assembly encounters a bottom obstacle, the mowing assembly can be passively moved upward to complete avoidance, and the safety is high.

Description

Technical Field

[0001] The present application relates to the technical field of lawn mowing equipment, and in particular to an adjustable lawn mowing mechanism and a lawn mowing robot. Background Art

[0002] Lawns require frequent mowing and maintenance, but manual mowing is labor-intensive and inefficient. Robotic lawn mowers can move and mow automatically, eliminating the need for manual operation. This reduces labor, improves efficiency, and maintains consistent grass height and quality. As a result, they are widely used for lawn mowing and maintenance in homes, parks, gardens, residential communities, golf courses, and more.

[0003] However, due to the different requirements for lawn height in different venues, the existing automatic lawn mowing robots generally use a screw transmission or a motor transmission to drive the mowing component up and down to achieve the height adjustment of the mowing component. However, after the height of the mowing component is adjusted to the right position, the mowing component as a whole cannot continue to move upward. When the mowing component encounters an obstacle, the height of the mowing component is fixed and cannot be automatically lifted, which is prone to collision or cuts, posing certain safety hazards. Summary of the Invention

[0004] The embodiments of the present application provide an adjustable mowing mechanism and a mowing robot, which can adjust the height of the mowing component. When the mowing component encounters a bottom obstacle, it can passively move upward to avoid it, which is highly safe.

[0005] In the first aspect, an embodiment of the present application provides an adjustable mowing mechanism, which is configured on a mowing robot. The adjustable mowing mechanism includes a base, a mowing assembly, a connecting rod assembly and an adjustment assembly. The base is arranged at the bottom of the frame of the mowing robot, and a mounting shaft is rotatably arranged in the base; the mowing assembly is arranged on one side of the base, and the mowing assembly is used to provide a cutting effect on the grass; the connecting rod assembly is connected to the mowing assembly and the base, and the connecting rod assembly includes a first connecting rod plate and a second connecting rod plate, one end of the first connecting rod plate is connected to the mounting shaft, and the other end is hinged to the mowing assembly, and a rotating shaft is also provided above the mounting shaft in the base, one end of the second connecting rod plate is hinged to the rotating shaft, and the other end is hinged to the mowing assembly; the adjustment assembly is arranged in the base, and the adjustment assembly adjusts the height of the mowing assembly by driving the first connecting rod plate to rotate; wherein the first connecting rod plate is sleeved on the mounting shaft so that the first connecting rod plate can rotate upward relative to the mounting shaft.

[0006] In this solution, a linkage assembly is provided between the base and the mowing assembly. The first and second linkage plates of the linkage assembly cooperate to achieve an articulated connection between the base and the mowing assembly. The first and second linkage plates, along with the mowing assembly and the base, form a parallel four-bar linkage. When the first linkage plate rotates upward, the mowing assembly is lifted upward, while when the first linkage plate rotates downward, the mowing assembly is lowered. An adjustment assembly is provided within the base, acting on the first linkage plate to raise or lower the mowing assembly as a whole, thereby adjusting the height of the mowing assembly above the ground. This allows for flexible adjustment of mowing height, adapting to various usage scenarios and extending the robot's applicability. More importantly, by fitting the first linkage plate onto the mounting shaft, the first linkage plate can rotate upward relative to the shaft. This allows the mowing assembly to maintain upward freedom even after height adjustment. When the mowing assembly encounters an obstacle below, it can passively move upward, automatically avoiding it and providing enhanced safety.

[0007] In some embodiments, the mowing assembly includes a blade holder, a first drive member, a cutter disc and multiple blades. The blade holder is connected to the connecting rod assembly, the first drive member is installed on the blade holder, and the driving end of the first drive member is connected to the cutter disc to drive the cutter disc to rotate. The multiple blades are arranged on the cutter disc and are spaced apart along the circumference of the cutter disc.

[0008] In the above technical solution, the blade holder serves as the installation carrier of the mowing assembly, the first driving member is installed on the blade holder, and the first driving member is connected to the cutter disc drive, thereby driving the cutter disc to rotate in the horizontal direction, and multiple blades are located on the outer peripheral side of the cutter disc. The multiple blades work together to achieve the mowing function, and the mowing efficiency is high.

[0009] In some embodiments, a guide block is provided on the front side of the blade holder, and a guide slope is provided on the guide block. The guide slope is used to squeeze the blade holder when the guide block contacts an external obstacle, so as to lift the mowing assembly upward by rotating the first connecting rod plate along the mounting shaft.

[0010] In the above technical solution, a guide block is provided on the front side of the blade holder, and the front side of the guide block has a guide slope. In this way, when the bottom of the mowing component encounters an external obstacle (obstacle), the obstacle will squeeze the blocking part, and under the action of the guide slope, the mowing component is guided to automatically lift upward, so that the first connecting rod plate automatically rotates upward along the installation axis, completing the passive upward lifting of the mowing component. It has the function of automatic obstacle avoidance, does not require human intervention, and is easy to promote.

[0011] In some embodiments, the adjusting assembly comprises a second driving member, a worm, a sector gear and a supporting plate, the second driving member is installed in the installation cavity, the worm is connected with the driving end of the second driving member, the worm is arranged in the vertical direction, the sector gear is arranged on the installation shaft and engaged with the worm, and the supporting plate is arranged on the installation shaft and located at the lower side of the first connecting rod plate.

[0012] In the above technical solution, the driving end of the second driving member is connected with the worm, so that the second driving member drives the worm to rotate, the worm drives the sector gear to rotate when rotating, the sector gear drives the installation shaft to rotate, and the supporting plate is arranged on the installation shaft, so that the supporting plate rotates synchronously with the installation shaft, and the supporting plate is located at the lower side of the first connecting rod plate, so that the supporting plate drives the first connecting rod plate to rotate upward to realize the lifting of the mowing assembly, and when the supporting plate rotates downward, the mowing assembly descends together with the supporting plate under the action of gravity, so that the mowing assembly is lowered.

[0013] In some embodiments, an elastic member is arranged between the second connecting rod plate and the mowing assembly, and the elastic member is used to provide a restoring force when the mowing assembly is lifted and accumulate elastic force when the mowing assembly is lowered.

[0014] In the above technical solution, the elastic member is arranged between the second connecting rod plate and the mowing assembly, so that the elastic member can provide part of the potential energy of the upward lifting of the mowing assembly, so that the power required for the upward lifting of the mowing assembly is smaller, and the elastic member can also buffer the mowing assembly to some extent, so that the action of the mowing assembly when being lifted or lowered is more stable.

[0015] In some embodiments, a touch block is arranged on the sector gear, and an upper micro switch is arranged in the base within the rotation stroke of the touch block, when the sector gear rotates to the touch block and the upper micro switch, the second driving member stops working to prevent the mowing assembly from continuing to lift.

[0016] In the above technical solution, the touch block is arranged on the sector gear, and the upper micro switch is arranged in the base, when the touch block contacts the upper micro switch, the upper limit position of the adjusting assembly can be calibrated, so that the mowing assembly cannot continue to rise, and the upper micro switch can play a role in calibrating the upper limit height.

[0017] In some embodiments, the base is provided with a lower micro switch within the rotation stroke of the touch block, when the sector gear rotates to the touch block and the lower micro switch, the second driving member stops working to prevent the mowing assembly from continuing to descend.

[0018] In the above technical solution, a lower micro switch is correspondingly provided in the base. After the touch block contacts the lower micro switch, the lower limit position of the assembly can be calibrated and adjusted, so that the mowing assembly cannot continue to descend. The lower limit height of the mowing assembly is reached, and the lower micro switch can play the role of calibrating the lower limit height.

[0019] In some embodiments, a plurality of weight-reducing grooves are provided on the bottom of the upper link plate and the lower link plate.

[0020] In the above technical solution, by providing a plurality of weight-reducing grooves on the upper link plate and the lower link plate, the weight of the upper link plate and the lower link plate can be reduced while ensuring that the upper link plate and the lower link plate are plate-shaped structures.

[0021] In a second aspect, an embodiment of the present application further provides a lawn mowing robot, which includes a frame and the aforementioned adjustable mowing mechanism, and the mowing component is installed on the bottom of the frame through a base.

[0022] The beneficial effects of this solution are as follows: by arranging an adjustment component on the base, the mowing component can be electrically lifted and lowered to meet the demand for arbitrary adjustment of the height of the mowing component, and a floating height adjustment structure is adopted, that is, the first connecting rod plate is sleeved on the mounting shaft, so that the mowing has upward freedom. When the mowing component encounters a bottom obstacle, the mowing component can be passively moved upward under the guidance of the guide block, and emergency avoidance is automatically completed without human intervention.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a lawn mowing robot provided in some embodiments of the present application;

[0026] Figure 2 A schematic diagram of the structure of a lawn mowing robot in an upward-looking state provided by some embodiments of the present application;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the lawn mowing robot with an adjustable mowing mechanism separated from the frame;

[0028] Figure 4 for Figure 3Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0029] Figure 5 Structure diagram of the exposed adjustment assembly in the adjustable mowing mechanism provided for some embodiments of the present application;

[0030] Figure 6 Structure diagram of the adjustable mowing mechanism in the upward-looking state; Figure 5 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0031] Figure 7 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0032] Figure 8 Structure diagram of the adjustable mowing mechanism in the upward-looking state; Figure 7 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0033] Figure 9 Structure diagram of the adjustable mowing mechanism in the upward-looking state; Figure 5 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0034] Figure 10 Structure diagram of the adjustable mowing mechanism in the upward-looking state; Figure 9 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0035] Figure 11 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0036] Figure 12 Structure diagram of the adjustable mowing mechanism in the upward-looking state; Figure 11 Structure diagram of the adjustable mowing mechanism in the upward-looking state;

[0037] Figure: 100 - mowing robot; 10 - frame; 11 - plug-in post; 20 - base; 21 - mounting shaft; 22 - upper micro switch; 23 - lower micro switch; 24 - rotating shaft; 25 - plug hole; 30 - mowing assembly; 31 - cutter seat; 32 - cutter disc; 33 - cutter blade; 34 - first driving member; 40 - connecting rod assembly; 41 - first connecting rod plate; 42 - second connecting rod plate; 43 - elastic member; 44 - weight-reducing groove; 50 - adjustment assembly; 51 - second driving member; 52 - worm; 53 - sector gear; 54 - supporting plate; 55 - touch block; 60 - guide block; 61 - guide inclined surface. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of the embodiments of the present application, it should be noted that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use, or are the orientations or positional relationships in which the product of the application is typically placed when in use. This is merely for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are used only to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0042] In addition, in the description of the embodiments of this application, unless otherwise specified or limited, the terms "assembly" and "connection" should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this embodiment can be understood according to the specific circumstances.

[0043] Example

[0044] The present application embodiment provides a lawn mowing robot. Figures 1 to 12 The mowing robot 100 includes a frame 10 and an adjustable mowing mechanism. The adjustable mowing mechanism can adjust the height of the mowing component 30 to meet the needs of different scenarios and has a wider range of applications. When the mowing mechanism encounters a bottom obstacle, it can passively move upward and automatically avoid it, which is safer.

[0045] Specifically, the adjustable mowing mechanism is configured on the mowing robot 100, and the adjustable mowing mechanism includes a base 20, a mowing assembly 30, a connecting rod assembly 40 and an adjustment assembly 50. The base 20 is arranged at the bottom of the frame 10 of the mowing robot, and a mounting shaft 21 is rotatably arranged in the base 20; the mowing assembly 30 is arranged on one side of the base 20, and the mowing assembly 30 is used to provide a cutting effect on the grass; the connecting rod assembly 40 is connected to the mowing assembly 30 and the base 20, and the connecting rod assembly 40 includes a first connecting rod plate 41 and a second connecting rod plate 42. One end of a connecting rod plate 41 is connected to the mounting shaft 21, and the other end is hinged to the mowing assembly 30. A rotating shaft 24 is also provided above the mounting shaft 21 in the base 20. One end of the second connecting rod plate 42 is hinged to the rotating shaft 24, and the other end is hinged to the mowing assembly 30; the adjustment assembly 50 is provided in the base 20, and the adjustment assembly 50 adjusts the height of the mowing assembly 30 by driving the first connecting rod plate 41 to rotate; wherein the first connecting rod plate 41 is sleeved on the mounting shaft 21 so that the first connecting rod plate 41 can rotate upward relative to the mounting shaft 21.

[0046] In this embodiment, the first link plate 41 and the second link plate 42 cooperate to achieve an articulated connection between the base 20 and the mowing assembly 30. The first link plate 41, the second link plate 42, the mowing assembly 30, and the base 20 form a parallel four-bar linkage. When the first link plate 41 rotates upward, the mowing assembly 30 can be lifted upward, and when the first link plate 41 rotates downward, the mowing assembly 30 can be lowered as a whole. By providing an adjustment assembly 50 within the base 20, the adjustment assembly 50 can act on the first link plate 41 of the link assembly 40 to drive the mowing assembly 30 upward or downward as a whole, thereby adjusting the height of the mowing assembly 30 from the ground. This meets the need for arbitrary adjustment of the mowing height, adapts to the different usage scenarios of the mowing robot, and has a wider range of applications. More importantly, by sleeved on the mounting shaft 21, the first connecting rod plate 41 can rotate upward relative to the mounting shaft 21, so that the mowing assembly 30 still has upward freedom even after the height adjustment is completed. When the mowing assembly 30 encounters a bottom obstacle, it can passively move upward and automatically avoid it, which is safer.

[0047] The adjustment component 50 may be of various structures, for example, it may be manually adjusted or automatically adjusted.

[0048] In some embodiments, see Figure 11The mowing assembly 30 includes a blade holder 31, a first driving member 34, a cutter disc 32, and a plurality of blades 33. The blade holder 31 is connected to the connecting rod assembly 40. The first driving member 34 is mounted on the blade holder 31. The driving end of the first driving member 34 is drivingly connected to the cutter disc 32 to drive the cutter disc 32 to rotate. The plurality of blades 33 are arranged on the cutter disc 32 and spaced apart along the outer circumference of the cutter disc 32. The blade holder 31 serves as a mounting carrier for the mowing assembly 30. The first driving member 34 is mounted on the blade holder 31. The first driving member 34 is drivingly connected to the cutter disc 32 to drive the cutter disc 32 to rotate horizontally. The plurality of blades 33 are located on the outer circumference of the cutter disc 32. The plurality of blades 33 work together to achieve the mowing function, thereby achieving high mowing efficiency.

[0049] Among them, the first driving member 34 is a mowing motor, the connecting rod assembly 40 is connected to the blade holder 31, the first connecting rod plate 41 and the second connecting rod plate 42 are respectively connected to the blade holder 31, a mowing motor cavity is provided in the blade holder 31, and the first driving member 34 is located in the mowing motor cavity.

[0050] In some embodiments, see Figure 5 A guide block 60 is provided on the front side of the blade holder 31. The guide block 60 has a guide bevel 61. The guide bevel 61 is used to squeeze the blade holder 31 when the guide block 60 contacts an external obstacle, so that the mowing assembly 30 is lifted upward by rotating the first connecting rod plate 41 along the mounting shaft 21. By providing the guide block 60 on the front side of the blade holder 31 and having the guide bevel 61 on the front side of the guide block 60, when the bottom of the mowing assembly 30 encounters an external obstacle (obstacle), the obstacle will squeeze the blocking portion, and under the action of the guide bevel 61, the mowing assembly 30 is automatically lifted upward, causing the first connecting rod plate 41 to automatically rotate upward along the mounting shaft 21, completing the passive upward lifting of the mowing assembly 30. This has the function of automatic obstacle avoidance, does not require human intervention, and is easy to promote.

[0051] In some embodiments, see Figure 5 and Figure 6The adjustment assembly 50 includes a second driving member 51, a worm 52, a sector gear 53 and a support plate 54. The second driving member 51 is installed in the installation cavity. The worm 52 is connected to the driving end of the second driving member 51, and the worm 52 extends in the vertical direction; the sector gear 53 is provided on the installation shaft 21, and the sector gear 53 is engaged with the worm rod; the support plate 54 is provided on the installation shaft 21 and is located on the lower side of the first connecting rod plate 41. Under the rotation action of the sector gear 53, the support plate 54 drives the first connecting rod plate 41 to rotate so that the mowing assembly 30 is lifted or lowered. The driving end of the second driving member 51 is connected to the worm 52, so that the second driving member 51 drives the worm 52 to rotate. When the worm 52 rotates, it drives the sector gear 53 to rotate. The rotation of the sector gear 53 drives the mounting shaft 21 to rotate, and the support plate 54 is set on the mounting shaft 21. Therefore, the support plate 54 rotates synchronously with the mounting shaft 21, and the support plate 54 is located on the lower side of the first connecting rod plate 41. The support plate 54 will drive the first connecting rod plate 41 to rotate upward to achieve the lifting of the mowing assembly 30. When the support plate 54 rotates downward, the mowing assembly 30 falls together with the support plate 54 under the action of gravity, thereby achieving the descent of the mowing assembly 30.

[0052] The second driving member 51 is a driving motor, which can also be called a height adjustment motor, and is a prior art.

[0053] In some embodiments, see Figure 8 An elastic member 43 is provided between the second link plate 42 and the mowing assembly 30. The elastic member 43 is used to provide a restoring force when the mowing assembly 30 is raised and to accumulate elastic force when the mowing assembly 30 is lowered. By providing the elastic member 43 between the second link plate 42 and the mowing assembly 30, the elastic member 43 can provide some of the potential energy for the mowing assembly 30 to lift upward, reducing the power required to lift the mowing assembly 30 upward. The elastic member 43 also provides a certain cushioning effect on the mowing assembly 30, making the mowing assembly 30 move more smoothly when it is raised or lowered.

[0054] Wherein, the elastic member 43 can be a torsion spring, and can also be a return spring. In the present embodiment, the elastic member 43 is a return spring, one end of which is connected to the second connecting rod plate 42, and the other end is connected to the mowing assembly 30.

[0055] In some embodiments, see Figure 5The sector gear 53 is provided with a contact block 55, and the base 20 is provided with an upper microswitch 22 within the rotational range of the contact block 55. When the sector gear 53 rotates until the contact block 55 contacts the upper microswitch 22, the second driving member 51 stops operating, preventing the mowing assembly 30 from further rising. By providing the contact block 55 on the sector gear 53 and the corresponding upper microswitch 22 in the base 20, the upper limit position of the adjustment assembly 50 can be calibrated after the contact block 55 contacts the upper microswitch 22, preventing the mowing assembly 30 from further rising. This is the upper limit height of the mowing assembly 30. The upper microswitch 22 serves to calibrate the upper limit height.

[0056] In some embodiments, see Figure 5 The base 20 is provided with a lower microswitch 23 within the rotational range of the contact block 55. When the sector gear 53 rotates until the contact block 55 contacts the lower microswitch 23, the second drive member 51 stops operating, preventing the mowing assembly 30 from further descending. The lower microswitch 23 corresponding to the lower microswitch 23 provided in the base 20 contacts the lower microswitch 23, thereby calibrating the lower limit position of the adjustment assembly 50, preventing the mowing assembly 30 from further descending. The lower microswitch 23 serves to calibrate the lower limit height of the mowing assembly 30.

[0057] In some embodiments, the bottoms of the upper and lower link plates are provided with a plurality of weight-reducing grooves 44. By providing the plurality of weight-reducing grooves 44 on the upper and lower link plates, the weight of the upper and lower link plates can be reduced while maintaining the plate-like structures of the upper and lower link plates.

[0058] In some embodiments, the base 20 and the frame 10 are modularly assembled. The base 20 is provided with a plurality of sockets 25 , and the frame 10 is correspondingly provided with plug-in columns 11 . The base 20 and the frame 10 are plug-in assembled.

[0059] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0060] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An adjustable mowing mechanism, configured on a mowing robot, is characterized by: include: A base is provided at the bottom of the frame of the lawn mowing robot, wherein a mounting shaft is rotatably provided in the base; A mowing assembly is provided on one side of the base, and is used to cut grass; A connecting rod assembly is connected to the mowing assembly and the base, the connecting rod assembly includes a first connecting rod plate and a second connecting rod plate, one end of the first connecting rod plate is connected to the mounting shaft, and the other end is hinged to the mowing assembly, and a rotating shaft is rotatably provided above the mounting shaft in the base, one end of the second connecting rod plate is hinged to the rotating shaft, and the other end is hinged to the mowing assembly; An adjustment assembly is disposed in the base, and the adjustment assembly drives the first connecting rod plate to rotate by driving the mounting shaft to rotate, so as to adjust the height of the mowing assembly; Wherein, the first connecting rod plate is sleeved on the mounting shaft so that the first connecting rod plate can rotate upward relative to the mounting shaft, so that after the height adjustment of the mowing assembly is completed, the mowing assembly still has upward freedom; The adjustment component includes: a second driving member, installed in the base; a worm connected to the driving end of the second driving member, wherein the worm is extended in a vertical direction; a sector gear, disposed on the mounting shaft, the sector gear meshing with the worm; a supporting plate, disposed on the mounting shaft and located below the first connecting rod plate, wherein under the rotation of the sector gear, the supporting plate drives the first connecting rod plate to rotate so as to lift or lower the mowing assembly; An elastic member is provided between the second link plate and the mowing assembly. The elastic member is used to provide a restoring force when the mowing assembly is lifted and to accumulate elastic force when the mowing assembly is lowered.

2. The adjustable mowing mechanism according to claim 1, wherein: The mowing assembly includes a blade holder, a first driving member, a cutter disc and a plurality of blades. The blade holder is connected to the connecting rod assembly. The first driving member is installed on the blade holder. The driving end of the first driving member is connected to the cutter disc to drive the cutter disc to rotate. The plurality of blades are arranged on the cutter disc and are spaced apart along the circumference of the cutter disc.

3. The adjustable mowing mechanism according to claim 2, wherein: A guide block is provided on the front side of the blade holder, and a guide slope is provided on the guide block. The guide slope is used to squeeze the blade holder when the guide block contacts an external obstacle, so as to lift the mowing assembly upward by rotating the first connecting rod plate along the mounting shaft.

4. The adjustable mowing mechanism according to claim 1, wherein: A touch block is provided on the sector gear, and an upper micro switch is provided in the base within the rotation range of the touch block. When the sector gear rotates until the touch block touches the upper micro switch, the second driving member stops working to prevent the mowing assembly from continuing to lift.

5. The adjustable mowing mechanism according to claim 4, wherein: The base is provided with a lower micro switch within the rotation range of the touch block. When the sector gear rotates until the touch block touches the lower micro switch, the second driving member stops working to prevent the mowing assembly from continuing to descend.

6. The adjustable mowing mechanism according to claim 1, wherein: A plurality of weight-reducing grooves are provided on the bottoms of the first connecting rod plate and the second connecting rod plate.

7. A lawn mowing robot, characterized in that: It comprises a vehicle frame and the adjustable mowing mechanism according to any one of claims 1 to 6, wherein the mowing assembly is mounted on the bottom of the vehicle frame through the base.

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