Mowing equipment and automatic mower

Abstract

The utility model relates to mowing equipment and an automatic mowing machine, and aims to solve the problem that the adaptability of a cutting assembly is poor when the mowing equipment passes through obstacles and earth mounds in the prior art. The lifting mechanism of the mowing equipment comprises a first plate capable of ascending or descending relative to a supporting frame and a second plate in lap joint above the first plate. The cutting assembly is fixedly connected to the second plate, and the second plate is configured to be capable of adaptively moving in the vertical direction and / or the horizontal direction relative to the first plate under the action of external force applied to the cutting assembly; the mowing equipment further comprises a reset piece, and the reset piece is configured to enable the second plate piece to reset after the adaptive movement occurs. According to the mowing equipment provided by the utility model, the lifting structure of the mowing equipment can adaptively move within a certain range on the basis of having the function of adjusting the height of the cutter head, so that the trafficability of the mowing equipment is improved, soil mounds are prevented from being scraped, and the overall attractiveness of a lawn is improved.

Description

Technical Field

[0001] The utility model patent relates to a lawn mowing device, in particular to a lawn mowing device installed on a self-moving device. Background Art

[0002] Lawn mowers are widely used in agriculture, gardening, parks and other fields due to their advantages of efficient mowing, safety, reliability, environmental protection and energy saving. Their precise mowing, versatility and user-friendly design have greatly improved the efficiency of lawn maintenance and are favored by users.

[0003] In the related art, the mowing equipment can block most obstacles on the lawn through the blocking structure, but some smaller obstacles will still be left behind. These obstacles will collide with the cutting components, which may easily cause damage to the cutting components and increase the cost of repair and replacement. In addition, when the mowing equipment passes through a mound, it is easy for the grass on the top of the mound to be flattened by the cutting equipment, thereby damaging the quality of the grass and affecting the overall mowing effect. In other words, the mowing equipment in the related art has poor adaptability in the above working conditions. Utility Model Content

[0004] The utility model provides a lawn mowing device and an automatic lawn mower in view of the prior art. When the lawn mowing device contacts an obstacle or a raised earth mound, its lifting structure can perform adaptive activities within a certain range on the basis of having the function of adjusting the height of the blade, thereby improving the passability of the lawn mowing device.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions.

[0006] The utility model provides a lawn mowing device, comprising:

[0007] A support frame, a lifting mechanism installed on the support frame and a cutting assembly installed on the lifting mechanism, wherein the lifting mechanism is configured to drive the cutting assembly to rise and fall; the lifting mechanism includes a first plate member that can rise or fall relative to the support frame, and a second plate member overlapped on top of the first plate member; wherein the cutting assembly is fixedly connected to the second plate member, and the second plate member is configured to be able to undergo adaptive movement in the vertical direction and / or in the horizontal direction relative to the first plate member when the cutting assembly is subjected to an external force; the mowing equipment also includes a reset member, which is configured to enable the second plate member to be reset after the adaptive movement occurs.

[0008] In some embodiments, the lifting mechanism further includes a guide column mounted on the support frame, wherein the guide column passes through the first plate and the second plate, and the first plate and the second plate can rise or fall along the length direction of the guide column.

[0009] In some embodiments, the lifting mechanism also includes: a mounting plate installed on the top of the guide column, and the mounting plate is located above the second plate; a lifting motor installed on the mounting plate; a screw transmission assembly connected to the output end of the lifting motor, the screw transmission assembly is transmission-connected to the first plate, and the screw transmission assembly is configured to drive the first plate to rise or fall.

[0010] In some embodiments, the second plate is provided with a through hole, the guide column is passed through the through hole, and there is a movable gap between the inner wall of the through hole and the outer wall of the guide column.

[0011] In some embodiments, the ratio of the diameter of the through hole to the diameter of the guide post is in the range of 1.2 to 2.5.

[0012] In some embodiments, the first plate member is provided with a guide sleeve, which is sleeved on the outer side of the guide column, and a supporting member is provided above the guide sleeve, and the cross-section of the supporting member gradually decreases from bottom to top; the second plate member is provided with a sleeve, which is sleeved on the outer side of the supporting member, and the inner surface contour of the sleeve is adapted to the outer contour of the supporting member.

[0013] In some embodiments, the supporting member and the guide sleeve are an integral structure.

[0014] In some embodiments, the outer surface of the supporting member is in any shape of a cone, a truncated cone, a pyramid, or a truncated pyramid.

[0015] In some embodiments, the angle formed between the outer surface of the supporting member and the bottom plane thereof is in the range of 30° to 70°.

[0016] In some embodiments, the top of the supporting member has a step portion extending upward, and the inner surface of the sleeve has an extension structure matched with the step portion.

[0017] In some embodiments, the reset member is an elastic member, one end of the elastic member is connected to the first plate member, and the other end of the elastic member is connected to the second plate member, and the elastic member is configured to enable the second plate member to reset after an activity occurs.

[0018] The utility model also provides an automatic lawn mower, comprising a self-moving device and the above-mentioned lawn mowing device; the lawn mowing device is arranged on the self-moving device, and can complete the lawn mowing operation of a preset area under the drive of the self-moving device.

[0019] The beneficial effect of the utility model is that the mowing equipment of the utility model solves the problem that the cutting assembly of the mowing equipment in the prior art lacks adaptive regulation when it contacts obstacles or earth mounds. The mowing equipment provided by the utility model has a lifting structure that can perform adaptive activities within a certain range on the basis of having the function of adjusting the height of the blade, thereby improving the passability of the mowing equipment, avoiding the mounds from being flattened, and helping to improve the overall aesthetics of the lawn. In addition, this adaptive activity reduces the machine loss caused by the collision of the cutting assembly with obstacles, and reduces the maintenance cost caused by the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the implementation modes of the present invention, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of a lawn mowing device provided by an embodiment of the utility model is shown;

[0022] Figure 2 A schematic diagram of the internal structure of a lawn mowing device provided by an embodiment of the utility model is shown;

[0023] Figure 3 Shows Figure 2 A magnified schematic diagram of part A under viewing angle;

[0024] Figure 4 A schematic diagram of the internal structure of a mowing device showing adaptive activity taking place;

[0025] Figure 5 Shows Figure 4 An enlarged schematic diagram of part B under viewing angle;

[0026] Figure 6 An exploded schematic diagram of the lifting mechanism is shown;

[0027] Figure 7 A schematic diagram of the structure of the supporting member is shown;

[0028] Figure 8 A schematic diagram of an automatic lawn mower provided by an embodiment of the utility model is shown.

[0029] Description of Figure Numbers:

[0030] 100. Mowing equipment;

[0031] 10. Support frame;

[0032] 20. lifting mechanism; 21. first plate; 22. second plate; 221. through hole; 23. guide column; 24. mounting plate; 25. lifting motor; 26. screw transmission assembly; 261. screw body; 262. screw nut; 27. guide sleeve; 28. supporting member; 281. step portion; 29. ​​kit;

[0033] 30. Cutting components;

[0034] 40. Reset parts;

[0035] 200. Self-equipped equipment;

[0036] 1000. Automatic lawn mower. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Please refer to Figure 1 and Figure 8 The utility model proposes a mowing device 100 and an automatic mower 1000. The mowing device 100 can be easily installed on a self-moving device 200. The self-moving device 200 generates a predetermined mowing path based on the mowing area set by the user. The self-moving device 200 can be a mobile carrier such as a crawler vehicle or a wheeled vehicle that can have a mounting position for the mowing device 100. The self-moving device 200 and the mowing device 100 are combined to form an automatic mower 1000 to complete the automatic mowing work; the mowing device 100 is used to complete the mowing operation of the predetermined area along the predetermined path generated by the self-moving device 200 under the drive of the self-moving device 200.

[0040] In the related art, the mowing device 100 is usually provided with a lifting mechanism 20, and the cutting assembly 30 is fixedly installed on the lifting mechanism 20. The operator can adjust the height of the cutting assembly 30 relative to the ground according to the height of the grass before cutting and the desired mowing effect. When there are obstacles on the lawn or the lawn has mounds, and the height of these obstacles or mounds is higher than the preset cutting height, the cutting assembly 30 of the mowing device 100 will collide with the obstacles and mounds. On the one hand, the machine itself is easily damaged, and on the other hand, the lawn is flattened, which harms the quality of the lawn and destroys the overall aesthetics of the lawn. Based on this, the applicant has conducted in-depth research to solve the problem that the cutting assembly 30 of the mowing device 100 has poor adaptability when passing through obstacles and mounds.

[0041] The structure of the lawn mowing device 100 in the present application is described in detail below.

[0042] Please refer to Figures 2 to 5 The utility model proposes a lawn mowing device 100, including a support frame 10, a lifting mechanism 20 installed on the support frame 10 and a cutting assembly 30 installed on the lifting mechanism 20, the lifting mechanism 20 is configured to drive the cutting assembly 30 to rise and fall; the lifting mechanism 20 includes a first plate 21 that can rise or fall relative to the support frame 10, and a second plate 22 overlapped on the first plate 21; wherein the cutting assembly 30 is fixedly connected to the second plate 22, and the second plate 22 is configured to be able to perform adaptive activities in the vertical direction and / or in the horizontal direction relative to the first plate 21 when the cutting assembly 30 is subjected to external force; the lawn mowing device 100 also includes a reset member 40, and the reset member 40 is configured to enable the second plate 22 to be reset after the adaptive activity occurs.

[0043] The lifting mechanism 20 adopts a double-plate design. When the lifting mechanism 20 adjusts its height, the first plate 21 and the second plate 22 overlapped thereon both change their height relative to the ground. The cutting assembly 30 is fixedly connected to the second plate 22. The two can be regarded as the same entity. The first plate 21 and the second plate 22 are in an overlapping relationship, that is, the two are not in a fixed connection relationship. When the cutting assembly 30 contacts a mound or an obstacle, the force generated by the collision will send the second plate 22 and the cutting assembly 30 upward as a whole, thereby temporarily releasing the overlapping relationship between the first plate 21 and the second plate 22, so that the second plate 22 can be separated from the first plate 21 and perform adaptive activities in the vertical direction and / or horizontal direction relative to the first plate 21. The motion trajectory of the adaptive activity depends on the direction of the force generated by the collision.

[0044] The mowing device 100 also has a reset member 40, which is connected between the first plate 21 and the second plate 22. The reset member 40 has a restraining effect. When the first plate 21 and the second plate 22 are separated, the reset member 40 can ensure that the second plate 22 can adaptively move within an acceptable range. After the mowing device 100 passes through an obstacle or a mound, the reset member 40 can restore the previous overlapping state of the first plate 21 and the second plate 22, thereby restoring the preset mowing height and ensuring that the cutting height of the target lawn is consistent.

[0045] In this way, this embodiment solves the problem of poor adaptability of the cutting assembly 30 when the mowing device 100 passes through obstacles and earth mounds by setting the adaptive movement of the second plate 22 relative to the first plate 21, limiting the reset member 40, and applying the reset function. The improved mowing device 100 has improved durability, is conducive to reducing maintenance costs, protecting the quality of the lawn, and bringing a better user experience to the user.

[0046] Please refer to Figure 2 In some embodiments, the lifting mechanism 20 further includes a guide post 23 installed on the support frame 10, the guide post 23 passes through the first plate 21 and the second plate 22, and the first plate 21 and the second plate 22 can rise or fall along the length direction of the guide post 23. The guide post 23 passes through the first plate 21 and the second plate 22 and is installed on the support frame 10 of the mowing device 100, and its function is to guide the first plate 21 and the second plate 22 when they are lifted and lowered, and when the first plate 21 undergoes adaptive activities, so that the first plate 21 and the second plate 22 move along the guide post 23 to prevent dislocation during the movement. A plurality of guide posts 23 can be provided according to the space conditions of the mowing device 100, and the plurality of guide posts 23 are symmetrically distributed, which is conducive to reducing the shaking and swaying of the first plate 21 and the second plate 22 when they are lifted and lowered or when the first plate 21 undergoes adaptive activities, thereby maintaining balance, and providing strong support for the long-term stable operation of the mowing device 100.

[0047] Please continue to refer to Figure 2 In some embodiments, the lifting mechanism 20 also includes a mounting plate 24 installed on the top of the guide column 23, and the mounting plate 24 is located above the second plate 22; a lifting motor 25 installed on the mounting plate 24; a screw transmission assembly 26 connected to the output end of the lifting motor 25, the screw transmission assembly 26 is transmission-connected to the first plate 21, and the screw transmission assembly 26 is configured to drive the first plate 21 to rise or fall.

[0048] In the lifting mechanism 20, a mounting plate 24 is installed on the top of the guide column 23, and the mounting plate 24 and the lifting motor 25 located on the mounting plate 24 are located above the second plate 22. The screw drive assembly 26 includes a screw body 261 and a screw nut 262. The screw nut 262 is fixedly connected to the first plate 21. The bottom part of the screw body 261 is fixed to the support frame 10, and the top is connected to the mounting plate 24 and penetrated by the screw nut 262. The screw nut 262 has an internal thread, and the screw body 261 has an external thread that matches the screw nut 262. The lifting motor 25 is connected to the screw body 261 in a transmission manner. When the lifting motor 25 is running, the screw drive assembly 26 can convert the rotational motion into linear motion, driving the first plate 21 to move up and down along the screw body 261. In other words, the lifting motor 25 can drive the height of the first plate 21 relative to the ground to achieve the height adjustment of the cutting assembly 30, so as to adapt to lawns of different heights or handle obstacles of different heights.

[0049] Please refer to Figure 3 In some embodiments, the second plate 22 is provided with a through hole 221 , and the guide column 23 is passed through the through hole 221 , and there is a movable gap between the inner wall of the through hole 221 and the outer wall of the guide column 23 .

[0050] When the cutting assembly 30 of the mowing device 100 collides with an obstacle or a mound on the lawn, the force of the collision acts on the cutting assembly 30 and the second plate 22, so that the cutting assembly 30 and the second plate 22 move vertically upward along the guide column 23. When the second plate 22 is completely separated from the first plate 21, in addition to the vertical upward movement, the second plate 22 also has a range of motion in the horizontal direction, and the activity gap between the inner wall of the through hole 221 on the second plate 22 and the outer wall of the guide column 23 determines the size of the range of motion in the horizontal direction. This design provides the mowing device 100 with adaptive motion in the horizontal direction, and further improves the passability of the mowing device 100 when the cutting assembly 30 collides.

[0051] Please refer to Figure 3 In some embodiments, the ratio of the diameter of the through hole 221 to the diameter of the guide pillar 23 ranges from 1.2 to 2.5.

[0052] In order to improve the adaptability of the mowing device 100, the movable gap between the inner wall of the through hole 221 on the second plate 22 and the outer wall of the guide column 23 should not be too small. When the ratio of the diameter of the through hole 221 to the diameter of the guide column 23 is less than 1.2, the movable range of the second plate 22 in the horizontal direction is too small, which limits the flexibility of the mowing device 100; when the ratio of the diameter of the through hole 221 to the diameter of the guide column 23 is greater than 2.5, the movable range of the second plate 22 in the horizontal direction is too large, resulting in an excessive swing amplitude of the cutting assembly 30, resulting in reduced stability of the mowing device 100, and may exceed the cutting range of the cutting assembly 30, thereby damaging the outer shell of the mowing device 100. Therefore, the ratio of the diameter of the through hole 221 of the second plate 22 to the diameter of the guide column 23 is preferably controlled within the range of 1.2 to 2.5, and the specific ratio can be 1.4, 1.6, 2.0, etc., or can be any point value within the ratio range.

[0053] Please refer to Figure 3 and Figure 5 In some embodiments, the first plate 21 is provided with a guide sleeve 27, the guide sleeve 27 is sleeved on the outer side of the guide pillar 23, a supporting member 28 is provided above the guide sleeve 27, and the cross section of the supporting member 28 gradually decreases from bottom to top;

[0054] The second plate 22 is provided with a sleeve 29 , which is sleeved on the outer side of the supporting member 28 , and the inner surface contour of the sleeve 29 is matched with the outer contour of the supporting member 28 .

[0055] The guide sleeve 27 cooperates with the guide post 23. The setting of the guide sleeve 27 ensures that the first plate 21 moves along the guide post 23 during the lifting process, avoiding the friction between the first plate 21 and the guide post 23 during the lifting process. The outer side of the support member 28 above the guide sleeve 27 is adapted to the inner surface contour of the sleeve 29 of the second plate 22, so as to realize the overlapping relationship between the second plate 22 and the first plate 21, so that the second plate 22 can be supported by the first plate 21 to move upward until the cutting assembly 30 collides with the obstacle or mound of the lawn, and the second plate 22 is separated from the first plate 21; after the obstacle is overcome, the second plate 22 and the cutting equipment installed on the second plate 22 move downward along the guide post 23 under the action of gravity and the reset member 40 until the overlapping state of the second plate 22 and the first plate 21 is restored.

[0056] The cross-sectional area of ​​the supporting member 28 gradually decreases from bottom to top, playing a guiding role, so that when the second plate 22 descends, the sleeve 29 is more easily overlapped under the guidance of the supporting member 28. This avoids the situation where the second plate 22 cannot be reset due to the misalignment between the second plate 22 and the first plate 21.

[0057] In some embodiments, the supporting member 28 and the guide sleeve 27 are an integral structure. The supporting member 28 and the guide sleeve 27 can be integrally formed by casting, or can be an integral structure formed by a process such as welding.

[0058] Please refer to Figure 5 In some embodiments, the outer surface of the supporting member 28 is in the shape of a cone, a truncated cone, a pyramid, or a truncated pyramid.

[0059] The shape of the outer surface of the support member 28 is an important factor affecting the overlap and separation of the first plate 21 and the second plate 22. The support member 28 with a cone or truncated cone outer surface can minimize the friction during the fitting process of the support member 28 and the set 29, making the second plate 22 perform more smoothly during the lifting process, which is conducive to improving the flexibility of the equipment; the support member 28 with a pyramid or prism outer surface has better anti-drift performance, which is conducive to not being easily affected by small vibrations when the first plate 21 and the second plate 22 are overlapped, which is conducive to improving the stability of the equipment. Designers can flexibly select a support member 28 with an outer surface in any shape of a cone, truncated cone, pyramid, or prism according to actual conditions to achieve the best mechanical properties, and there is no restriction here.

[0060] In some embodiments, the angle formed between the outer surface of the supporting member 28 and the bottom plane thereof is in the range of 30° to 70°.

[0061] The angle formed between the outer surface of the support member 28 and its bottom plane determines the difficulty of overlapping or separating the support member 28 and the sleeve 29. The larger the angle, for example 60°, the more stable the overlapping state of the second plate 22 and the first plate 21 is, that is, the cutting assembly 30 is subjected to a greater force to make the sleeve 29 detach from or overlap the support member 28.

[0062] On the contrary, the smaller the angle, for example 45°, the more flexible the overlap between the second plate 22 and the first plate 21, that is, the cutting assembly 30 can be subjected to a smaller force to make the kit 29 detach from or overlap with the supporting member 28. This small angle design is particularly suitable for work environments that require greater flexibility and rapid adjustment, such as scenarios that require frequent obstacle crossing or adaptation to different lawn conditions.

[0063] Please refer to Figure 5 In some embodiments, the top of the supporting member 28 has a step portion 281 extending upward, and the inner surface of the sleeve 29 has an extension structure adapted to the step portion 281 .

[0064] The upwardly extending step portion 281 limits the horizontal movement of the kit 29 to a certain extent, and can prevent the kit 29 from being separated from the supporting member 28 due to minor vibrations generated during operation of the mowing equipment 100 when the cutting assembly 30 does not contact an obstacle, thereby increasing the structural stability of the equipment.

[0065] Please refer to Figure 2 In some embodiments, the reset member 40 is an elastic member, one end of the elastic member is connected to the first plate member 21, and the other end is connected to the second plate member 22, and the elastic member is configured to enable the second plate member 22 to reset after an activity occurs.

[0066] Specifically, both the first plate 21 and the second plate 22 are provided with elastic member installation positions, and the elastic force of the elastic member affects the reset speed of the second plate 22 after it is separated from the first plate 21. Designers can ensure that the reset speed of the second plate 22 is moderate by balancing the elastic force of the elastic member and the device structure, so that it can recover quickly and maintain stability.

[0067] The present invention further provides an automatic lawn mower 1000, comprising a self-moving device 200 and the above-mentioned lawn mowing device 100; the lawn mowing device 100 is arranged on the self-moving device 200, and can complete the lawn mowing operation in a preset area under the drive of the self-moving device 200.

[0068] The self-moving device 200 is a mobile vehicle body that can adopt a variety of designs, such as a tracked vehicle, a wheeled vehicle, etc., and can move freely under different terrains and environmental conditions. The self-moving device 200 has precise positioning technology, such as a global positioning system and an inertial navigation system, so that the self-moving device 200 can be accurately positioned. The self-moving device 200 can also be equipped with an obstacle avoidance system, such as ultrasonic obstacle avoidance, visual obstacle avoidance, infrared obstacle avoidance, etc., which can avoid obstacles during operation and move along a preset path. The self-moving device 200 is equipped with the mowing device 100 described in the above embodiment, and can efficiently clean the lawn in the designated area under the drive of the self-moving device 200, and the entire cleaning process does not require manual operation. It has the ability to independently complete the mowing task, reduces manpower input, and enables the mowing task to be completed quickly and efficiently in different scenarios.

[0069] In the description of the present utility model, it should be understood that the terms "length", "width", "depth", "up", "down", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. Terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a transmission connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0070] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present utility model, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present utility model and the features of different embodiments or examples without contradiction.

[0071] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A lawn mowing device, characterized in that: It includes a support frame, a lifting mechanism installed on the support frame, and a cutting assembly installed on the lifting mechanism, wherein the lifting mechanism is configured to drive the cutting assembly to rise and fall; The lifting mechanism includes a first plate member capable of rising or falling relative to the support frame, and a second plate member overlapped on the first plate member; Wherein, the cutting assembly is fixedly connected to the second plate, and the second plate is configured to be able to adaptively move in the vertical direction and / or in the horizontal direction relative to the first plate when the cutting assembly is subjected to an external force; The mowing device further comprises a restoring member configured to enable the second plate to be restored after an adaptive movement occurs.

2. The lawn mowing equipment according to claim 1, characterized in that The lifting mechanism further includes a guide column mounted on the support frame, wherein the guide column passes through the first plate and the second plate, and the first plate and the second plate can rise or fall along the length direction of the guide column.

3. The lawn mowing equipment according to claim 2, characterized in that The lifting mechanism also includes: a mounting plate mounted on the top of the guide post, wherein the mounting plate is located above the second plate; A lifting motor mounted on the mounting plate; A screw transmission assembly is connected to the output end of the lifting motor, the screw transmission assembly is transmission-connected to the first plate, and the screw transmission assembly is configured to drive the first plate to rise or fall.

4. The lawn mowing equipment according to claim 2, characterized in that The second plate is provided with a through hole, the guide post is passed through the through hole, and there is a movable gap between the inner wall of the through hole and the outer wall of the guide post.

5. The lawn mowing equipment according to claim 4, characterized in that The ratio of the diameter of the through hole to the diameter of the guide post is in the range of 1.2 to 2.

5.

6. The lawn mowing equipment according to claim 2, characterized in that The first plate is provided with a guide sleeve, the guide sleeve is sleeved on the outer side of the guide post, a supporting member is provided above the guide sleeve, and the cross section of the supporting member gradually decreases from bottom to top; The second plate is provided with a sleeve, the sleeve is sleeved on the outer side of the supporting member, and the inner surface contour of the sleeve is matched with the outer contour of the supporting member.

7. The lawn mowing equipment according to claim 6, characterized in that The supporting member and the guide sleeve are an integrated structure.

8. The lawn mowing equipment according to claim 6, characterized in that The outer surface of the supporting member is in any shape of a cone, a truncated cone, a pyramid, or a truncated pyramid.

9. The lawn mowing equipment according to claim 6, characterized in that The angle formed between the outer surface of the supporting member and the bottom plane thereof is in the range of 30° to 70°.

10. The lawn mowing equipment according to claim 6, characterized in that The top of the supporting member is provided with a step portion extending upward, and the inner surface of the sleeve is provided with an extension structure matched with the step portion.

11. The lawn mowing equipment according to claim 1, characterized in that The reset member is an elastic member, one end of which is connected to the first plate member, and the other end of which is connected to the second plate member. The elastic member is configured to reset the second plate member after an activity occurs.

12. An automatic lawn mower, characterized in that: It comprises a self-moving device and a lawn mowing device as claimed in any one of claims 1 to 11; the lawn mowing device is arranged on the self-moving device and can complete lawn mowing operations in a preset area under the drive of the self-moving device.

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