Suspension mechanism of a mower and mower

Abstract

The application provides a suspension mechanism of a mower and the mower. The suspension mechanism comprises a fixing frame, a sleeve fixed on the fixing frame, a first supporting column, one end of which is located in the sleeve, a second supporting column, one end of which is located in the sleeve and below the first supporting column, and an elastic member, two ends of which are connected with the first supporting column and the second supporting column respectively and located in the sleeve, and the elastic member is deformed along the horizontal direction, and the elastic member at least comprises a first deformation stage and a second deformation stage. In the first deformation stage, the elastic member is deformed until the elastic member and the top end of the sleeve abut together, and in the second deformation stage, the elastic member is limited by the sleeve, and the part of the elastic member located outside the sleeve continues to be deformed. The application can obtain the maximum vibration energy absorption with a small energy cost, thereby improving the safety and stability of the mower during operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric tools, and particularly relates to a suspension mechanism of a lawn mower and the lawn mower. BACKGROUND

[0002] As an application of intelligentization of lawn mowers, intelligent lawn mowers have been applied very much in the market. A very important technology in intelligent lawn mowers is that when an obstacle is touched, a collision signal is transmitted to a control board, and the control board makes a corresponding feedback, such as stopping working.

[0003] The lawn mower usually has a chassis and a shell, and the shell is movably connected to the chassis. When the intelligent lawn mower touches an obstacle or is lifted artificially, the shell part moves relative to the chassis part, thereby triggering the action of a corresponding sensor or micro switch, so that the lawn mower performs a related action, such as retreating or stopping working. At present, the shell is movably connected to the chassis by a suspension structure, but the current suspension structure has certain limitations in overcoming the vibration and relative movement between the shell and the chassis due to collision or bumping during the operation of the lawn mower, further resulting in unreliable operation. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a suspension mechanism of a lawn mower and the lawn mower, so as to improve the problem that the current suspension structure has certain limitations in overcoming the vibration and relative movement between the shell and the chassis due to collision or bumping during the operation of the lawn mower, further resulting in unreliable operation.

[0005] To achieve the above object and other related objects, the present application provides a suspension mechanism of a lawn mower, comprising:

[0006] A fixed frame is provided with a sleeve fixedly arranged thereon;

[0007] A first support column has one end located in the sleeve;

[0008] A second support column has one end located in the sleeve and below the first support column;

[0009] An elastic member has two ends connected with the first support column and the second support column respectively and located in the sleeve, and the elastic member deforms in a horizontal direction, and the elastic member at least includes a first deformation stage and a second deformation stage,

[0010] In the first deformation stage, the elastic member deforms until the elastic member and the top end of the sleeve abut together, and in the second deformation stage, the elastic member is limited by the sleeve, and the part of the elastic member located outside the sleeve continues to deform.

[0011] In one embodiment of the present invention, the elastic element as a whole may deform during the first deformation stage.

[0012] In one embodiment of the present invention, the elastic element is a spring.

[0013] In one embodiment of the present invention, the force required for the elastic element to deform in the second deformation stage is greater than the force required for deformation in the first deformation stage.

[0014] In one embodiment of the present invention, the first support column and the second support column are respectively provided with a first thread and a second thread that match the elastic element at their respective ends that are close to each other, so that the two ends of the elastic element are threadedly connected to the first support column and the second support column.

[0015] In one embodiment of the present invention, when the first support column causes the elastic element to be stretched and tilted in the direction of the lawnmower's movement, the elastic element abuts against the top end of the sleeve, and the elastic element is divided into a first part and a second part from the abutment point.

[0016] In one embodiment of the present invention, a first portion of the elastic element is located inside the sleeve, and a second portion of the elastic element is higher than the sleeve.

[0017] In one embodiment of the present invention, the length of the first portion of the elastic member is greater than the length of the second portion of the elastic member.

[0018] In one embodiment of the present invention, a through hole is provided at the middle position of the fixing frame and communicates with the inner cavity of the sleeve. The top of the second support column passes through the fixing frame through the through hole and is located inside the sleeve. An annular protrusion extends inward on the inner sidewall near the bottom of the sleeve. The annular protrusion is located around the second support column.

[0019] In one embodiment of the present invention, a fixing head is provided at the bottom of the second support column, and a first sensor is provided in the chassis of the lawnmower. The first sensor is located below the fixing head and is used to detect the displacement of the second support column.

[0020] In one embodiment of the invention, the suspension mechanism further includes a compression spring disposed between the fixed head and the annular protrusion.

[0021] In one embodiment of the present invention, the bottom of the fixing frame is further provided with an annular groove, the annular groove being located outside the through hole, and a sealing ring being provided inside the annular groove.

[0022] The present invention also proposes a lawnmower, including a chassis, a housing, and a suspension mechanism, wherein the housing is disposed outside the chassis, and the suspension mechanism is used to connect the chassis and the housing;

[0023] The suspension mechanism includes:

[0024] A fixing frame is fixedly connected to the chassis, and a sleeve is fixedly installed on the fixing frame;

[0025] The first support column has one end connected to the outer shell and the other end located inside the sleeve;

[0026] The second support column has one end connected to the chassis and the other end located inside the sleeve and below the first support column.

[0027] An elastic element, with its two ends connected to the first support column and the second support column respectively, is located inside the sleeve. The elastic element deforms in the horizontal direction and includes at least a first deformation stage and a second deformation stage.

[0028] In the first deformation stage, the elastic element deforms until it comes into contact with the top end of the sleeve. In the second deformation stage, the elastic element is restricted by the sleeve, and the portion of the elastic element outside the sleeve continues to deform.

[0029] This invention proposes a suspension mechanism for a lawnmower and a lawnmower in general. By fixing a sleeve on the fixed frame, the elastic element, as well as the ends of the first support and the second support connected to the elastic element, are all located on the sleeve. When the elastic element abuts against the top of the sleeve, the elastic element is divided into a first part and a second part from the abutment point. After abutment, the second part fails, requiring a larger external force to act on the first part to keep the outer shell moving. This prevents the outer shell from moving forward, thus enabling the structure to achieve maximum vibration energy absorption with minimal energy cost, thereby improving the safety and stability of the lawnmower during operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a lawnmower according to one embodiment of the present invention.

[0032] Figure 2for Figure 1 A magnified structural diagram of point A in the middle.

[0033] Figure 3 This is a schematic diagram of the suspension mechanism in a lawnmower according to one embodiment of the present invention.

[0034] Figure 4 This is a cross-sectional schematic diagram of the suspension mechanism in a lawnmower according to one embodiment of the present invention.

[0035] Figure 5 This is an exploded structural diagram of the suspension mechanism in a lawnmower according to one embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram showing the displacement and force relationship of the elastic element in the suspension mechanism during the movement of the outer shell in one embodiment of the present invention.

[0037] Label Explanation:

[0038] Lawn mower 100; chassis 10; outer shell 20; suspension mechanism 30; fixing frame 31; sleeve 32; reinforcing rib 321; first support column 33; second support column 34; elastic element 35; connecting part 331; connecting piece 21; first thread 332; second thread 341; first through hole 311; annular groove 312; sealing ring 313; bolt 314; second through hole 315; fixing head 342; annular protrusion 11; first sensor 12; magnet 343; second sensing structure 22; annular protrusion 321; compression spring 343; walking assembly 40; cutting assembly 50. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0041] Please see Figures 1 to 5As shown, in this embodiment, the present invention proposes a suspension mechanism for a lawnmower and a lawnmower to solve the problem that the current suspension structure has certain limitations in overcoming the vibration caused by collision or bumps during the operation of the lawnmower and the relative movement between the outer shell and the chassis, which further leads to the problem of unreliable operation. Specifically, the lawnmower 100 includes a chassis 10, an outer shell 20 and a suspension mechanism 30. The outer shell 20 is provided on the outside of the chassis 10 to protect the chassis 10 and also to protect the operator. The suspension mechanism 30 is used to movably connect the chassis 10 and the outer shell 20.

[0042] Please see Figures 1 to 5 As shown, in this embodiment, the suspension device 30 includes a fixed frame 31, a sleeve 32, a first support column 33, a second support column 34, and an elastic element 35. The fixed frame 31 is fixedly installed on the chassis 10, and the sleeve 32 is fixedly disposed above the fixed frame 31. One end of the first support column 33 is connected to the outer shell 20, and the other end is connected to one end of the elastic element 35 and is located inside the sleeve 32. The second support column 34 is located below the first support column 33, and one end of the second support column 34 is connected to the chassis 10, and the other end is connected to the other end of the elastic element 35 and is located inside the sleeve 32. The elastic element 35 is located inside the sleeve 32 so that the outer shell 20 can move relative to the chassis 10 in a direction perpendicular to the chassis 10 and / or in a horizontal direction. It should be noted that the horizontal direction is the direction parallel to the ground, and the direction perpendicular to the chassis 10 is the direction perpendicular to the ground, i.e., the vertical direction.

[0043] Please see Figures 1 to 5 As shown, in this embodiment, the first support column 33 is provided with a connecting portion 331. Correspondingly, a mounting cavity corresponding to the connecting portion 331 is provided inside the outer shell 20, and the connecting portion 331 is installed in the mounting cavity. Specifically, in this embodiment, the connecting portion 331 is located at the top of the first support column 33, and the connecting portion 331 is, for example, a spherical structure. A connecting member 21 is correspondingly provided inside the outer shell 20, and the connecting member 21 is fixedly connected to the outer shell 20. The mounting cavity is located inside the connecting member 21 and is adapted to the connecting portion 331, that is, the connecting portion 331 is installed in the mounting cavity to fix the first support column 33 to the outer shell 20, so that when the outer shell 20 is moved by an external force, it drives the first support column 33 to move.

[0044] It should be noted that in some embodiments, the connector 21 can be set as a rubber structure. When the lawnmower is involved in a collision, the elastic element 35 will not directly return to its original state, but will continue to vibrate. At this time, both the elastic element 35 and the connector 21 will deform. Since the connector 21 can play a damping role and absorb vibration energy, it can be used to absorb some vibration energy to prevent the chassis 10 from cracking, thereby greatly extending the service life of the lawnmower and reducing the cost of use.

[0045] Please see Figures 1 to 5 As shown, in this embodiment, the first support column 33 and the second support column 34 are respectively provided with a first thread 332 and a second thread 341 that match the elastic member 35 at their respective ends, so that both ends of the elastic member 35 are threadedly connected to the first support column 33 and the second support column 34. Specifically, in this embodiment, one end of the first support column 33 is provided with a first thread 332 that matches the elastic member 35, and one end of the second support column 34 is also provided with a second thread 341 that matches the elastic member 35, so that one end of the elastic member 35 is threadedly connected to the first support column 33 and the other end is threadedly connected to the second support column 34.

[0046] Please see Figures 1 to 5 As shown, in this embodiment, the pitch of the first thread 332 gradually increases from bottom to top, and the pitch of the second thread 341 is correspondingly set to gradually increase from top to bottom. When the elastic element 35 is screwed into the first support column 33 and the second support column 34, the elastic element 35 will gradually tighten, resulting in an increase in the pressure between the elastic element 35 and the first support column 33 and the second support column 34, thereby increasing the friction between the elastic element 35 and the first support column 33 and the second support column 34, so as to prevent the elastic element 35 from detaching from the first support column 33 and / or the second support column 34, thereby causing the suspension mechanism 30 to lose its function.

[0047] Please see Figures 1 to 5As shown, in this embodiment, the fixing frame 31 has a first through hole 311, and in the vertical direction, the top of the second support column 34 passes through the fixing frame 31 through the first through hole 311 and is located inside the sleeve 32 to connect with the elastic member 35. Specifically, in this embodiment, the fixing frame 31 has a cylindrical structure, and the first through hole 311 is located at the center of the fixing frame 31. It should also be noted that an annular groove 312 is provided at the bottom of the fixing frame 31. The annular groove 312 is located outside the first through hole 311, and a sealing ring 313 is provided in the annular groove 312 to enhance the waterproof performance of the chassis 10. It should also be noted that an annular protrusion 11 is provided on the chassis 10 at a position corresponding to the annular groove 312. When the fixing frame 31 is fixedly installed on the chassis 10, the sealing ring 313, under the squeezing action between the annular protrusion 11 and the fixing frame 31, makes the fixing frame 31 tightly connected to the chassis 10, and improves the waterproof performance of its structure.

[0048] Please see Figures 1 to 5 As shown, in this embodiment, the fixing frame 31 is fixed to the chassis 10 by bolts 314. Specifically, second through holes 315 are provided on both sides of the fixing frame 31. The bolts 314 pass through the second through holes 315 and are threadedly connected to the chassis 10, thereby fixing the fixing frame 31 to the chassis 10. In some other embodiments, the fixing frame 31 can also be fixed to the chassis 10 by means of installation methods such as snap-fit ​​or interference fit.

[0049] Please see Figures 1 to 5 As shown, in this embodiment, the sleeve 32 is fixedly disposed above the fixing frame 31, and the elastic member 35, as well as the ends of the first support member 33 and the second support member 34 connected to the elastic member 35, are all located inside the sleeve 32. In this embodiment, the sleeve 32 and the fixing frame 31 are an integral structure.

[0050] Please see Figures 1 to 5 As shown, in this embodiment, when the lawnmower 100 collides or bumps during its movement, the outer shell 20 and the chassis 10 will move relative to each other in the horizontal and / or vertical directions. At this time, the first support column 33, the second support column 34 and the elastic element 35 in the suspension mechanism 30 will also move relative to the outer shell 20, so that the suspension mechanism 30 plays a buffering role when the lawnmower 100 collides or bumps during its movement.

[0051] Please see Figures 1 to 5As shown, in this embodiment, a fixing head 342 is provided at the bottom of the second support column 34, and a first sensor 12 is provided inside the chassis 10. The first sensor 12 is located below the fixing head 342 and is used to detect the displacement of the second support column 34. Specifically, in this embodiment, a first sensing structure corresponding to the first sensor 12 is provided on one end of the fixing head 342 of the second support column 34. For example, the first sensing structure is set as a magnet 343, which is installed on one end of the fixing head 342 of the second support column 34. In some embodiments, the sensing structure can also be set as a metal sheet, which can be disposed on the bottom surface of the fixing head 342 on the second support column 34. When the lawnmower 100 experiences a collision or bump during its movement, causing the outer casing 20 to move upward and / or forward relative to the chassis 10, the outer casing 20 will drive the first support column 33 to move, and under the action of the elastic element 35, the second support column 34 will move upward. If the first sensor 12 detects that the second support column 34 has been displaced and the displacement exceeds a set value, it will send a sensing signal to the control component, which will then send a control signal to the cutting component to stop the lawnmower from working.

[0052] Please see Figures 1 to 5 As shown, it should also be noted that an annular protrusion 321 extends inward on the inner sidewall of the bottom of the sleeve 32. The annular protrusion 321 is located around the second support column 34, that is, the annular protrusion 321 is provided around the end of the second support column 34 located inside the sleeve 32, so as to restrict the horizontal displacement of the second support column 34, thereby making the second support column 34 only move in the vertical direction. A compression spring 343 is provided between the fixing head 342 and the annular protrusion 321. One end of the compression spring 343 abuts against the bottom surface of the annular protrusion 321, and the other end abuts against the upper surface of the fixing head 342.

[0053] Please see Figures 1 to 5 As shown, when the outer casing 20 moves upward relative to the chassis 10 in the vertical direction, the outer casing 20 will drive the first support column 33 to move upward, and under the action of the elastic element 35, the second support column 34 will also move upward. At this time, the compression spring 343 is compressed. When the external force disappears, under the elastic force of the compression spring 343, the second support column 34, the elastic element 35 and the first support column 33 return to the initial position, so that the lawnmower 100 can continue to work.

[0054] Please see Figures 1 to 5As shown, in this embodiment, a second sensor is also provided on the chassis 10. Correspondingly, a second sensing structure 22 corresponding to the second sensor is provided on the outer casing 20. The second sensing structure 22 is a magnet or a metal sheet. When the lawnmower experiences a collision or bump during its movement, causing the outer casing 20 to move forward relative to the chassis 10, the displacement of the outer casing 20 is detected. If the second sensor detects that the outer casing 20 has shifted and the shift exceeds a set value, it sends a sensing signal to the control component, which then sends a control signal to the cutting component to stop the lawnmower from working.

[0055] Please see Figures 1 to 5 As shown, in this embodiment, when the lawnmower 100 experiences a collision or bump during movement, causing the outer casing 20 to move horizontally relative to the chassis 10, the outer casing 20 drives the first support column 33 to move in the direction of movement of the outer casing 20 and forward a certain distance, causing the elastic element 35 to deform horizontally. The elastic element 35 includes at least a first deformation stage and a second deformation stage. In the first deformation stage, the elastic element 35 deforms until it abuts against the top end of the sleeve 35. In the second deformation stage, the elastic element 35 is constrained by the sleeve 32, and under the constraint of the sleeve 35, the portion of the elastic element 35 outside the sleeve 32 continues to deform. In this embodiment, the elastic element 35 is, for example, a spring. It should be noted that the force required for the elastic element 35 to deform in the second deformation stage is greater than the force required for deformation in the first deformation stage.

[0056] Please see Figures 1 to 5As shown, in the first deformation stage, the elastic member 35 is deformed as a whole under the action of the first support column 33 until the elastic member 35 abuts against the top end of the sleeve 32. At this time, the first deformation stage ends, and the elastic member 35 is divided into a first part and a second part from the abutment point. The first part of the elastic member 35 is located inside the sleeve 32, and the second part of the elastic member 35 is higher than the sleeve 32. The length of the first part of the elastic member 35 is greater than the length of the second part of the elastic member 35. Specifically, the first part is connected from one end of the first support column 33 to the abutment, and the second part is connected from one end of the second support column 34 to the abutment. That is, the second part is the part of the elastic member 35 that is located inside the sleeve 32 after deformation in the first deformation stage, and the first part is the part of the elastic member 35 that is located outside the sleeve 32 after deformation in the first deformation stage. At this time, under the restriction of the sleeve 32, the elastic member 35 enters the second deformation stage, that is, the first part of the elastic member 35 located outside the sleeve 32 continues to deform.

[0057] Please see Figures 1 to 5 and Figures 1 to 5 As shown, in a structure without a sleeve 32, for example, the initial position of the elastic element 35 and the first support column 33 is P1. When driven by the outer shell 20, the elastic element 35 and the first support column 33 move to position P2, and then move from position P2 to position P3. In the above process, the force applied to the elastic element 35 and the moving distance are linearly related. In this embodiment, when the outer shell 20 is driven, the elastic element 35 enters the first deformation stage, causing the elastic element 35 and the first support column 33 to move to position P2. At this time, the elastic element 35 abuts against the top of the sleeve 32, thereby causing the second part to lose its function. At this time, the elastic element 35 enters the second deformation stage, that is, only the first part located outside the sleeve 32 continues to deform, causing the elastic element 35 to move from position P2 to position P3. That is, in the second deformation stage, only the first part can continue to extend. However, since the length of the first part is relatively short, and it has already stretched a certain distance during the process of moving to abut against the sleeve 32, if the first part is to continue to stretch, a greater external force is required, thereby preventing the outer shell 20 from continuing to move forward. Even if the lawnmower 100 collides, it achieves maximum vibration energy absorption with a small energy cost during the process of moving from position P1 to P2, thereby improving the safety and stability of the lawnmower 100 during operation.

[0058] Please see Figures 1 to 5 and Figure 1As shown, in this embodiment, a plurality of reinforcing ribs 321 are provided on the outer circumference of the sleeve 32 to improve the structural strength of the sleeve 32 and avoid damage to the sleeve 32 during the contact between the elastic member 32 and the sleeve 32.

[0059] Please see Figure 6 As shown, in this embodiment, the lawnmower 100 further includes a walking assembly 40 and a cutting assembly 50. Both the walking assembly 40 and the cutting assembly 50 are mounted on the chassis 10. The walking assembly 40 drives the lawnmower 100 to move independently, and the cutting assembly 50 performs mowing operations during the lawnmower 100's self-movement. It should also be noted that the lawnmower 100 further includes a drive motor (not shown) for driving the walking wheels, a control assembly (not shown) for controlling the operation of the drive motor and the cutting assembly, and a battery pack for providing power to the lawnmower.

[0060] Please see Figure 1 Figure 3 Figure 1 Figure 1 As shown, it should be noted that in this embodiment, four suspension mechanisms 30 are provided, and they are respectively located at the four corners of the chassis 10. Of course, in other embodiments, the number and location of the suspension mechanisms 30 can be changed, and there are no restrictions here.

[0061] This invention proposes a suspension mechanism for a lawnmower and a lawnmower in general. By fixing a sleeve on the fixed frame, the elastic element, as well as the ends of the first support and the second support connected to the elastic element, are all located on the sleeve. When the elastic element abuts against the top of the sleeve, the elastic element is divided into a first part and a second part from the abutment point. After abutment, the second part fails, requiring a larger external force to act on the first part to keep the outer shell moving. This prevents the outer shell from moving forward, thus enabling the structure to achieve maximum vibration energy absorption with minimal energy cost, thereby improving the safety and stability of the lawnmower during operation.

[0062] The above description is merely a preferred embodiment of this application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the inventive concept. For example, technical solutions formed by replacing the above-mentioned features with technical features with similar functions disclosed in this application (but not limited to) each other.

[0063] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this invention, the other technical features will not be described in detail here.

Claims

1. A suspension mechanism (30) for a lawnmower, characterized in that, include: A fixing frame (31) is fixedly provided with a sleeve (32); The first support column (33) has one end located inside the sleeve (32); The second support column (34) has one end located inside the sleeve (32) and below the first support column (33); An elastic element (35) has its two ends connected to the first support column (33) and the second support column (34) respectively, and is located inside the sleeve (32). The elastic element (35) deforms in the horizontal direction, and the elastic element (35) includes at least a first deformation stage and a second deformation stage. In the first deformation stage, the elastic element (35) deforms until it comes into contact with the top end of the sleeve (32). In the second deformation stage, the elastic element (35) is restricted by the sleeve (32). The portion of the elastic element (35) outside the sleeve (32) continues to deform. The force required for the elastic element (35) to deform in the second deformation stage is greater than the force required for deformation in the first deformation stage.

2. The suspension mechanism (30) of the lawnmower according to claim 1, characterized in that, During the first deformation stage, the elastic element (35) as a whole can deform.

3. The suspension mechanism (30) of the lawnmower according to claim 1, characterized in that, The elastic element (35) is a spring.

4. The suspension mechanism (30) of the lawnmower according to claim 1, characterized in that, The first support column (33) and the second support column (34) are respectively provided with a first thread (332) and a second thread (341) that match the elastic element (35) at their respective ends close to each other, so that the two ends of the elastic element (35) are threadedly connected to the first support column (33) and the second support column (34).

5. The suspension mechanism (30) of the lawnmower according to claim 1, characterized in that, When the first support column (33) causes the elastic element (35) to be stretched and tilted in the direction of the lawnmower movement, the elastic element (35) abuts against the top of the sleeve (32), and the elastic element (35) is divided into a first part and a second part from the abutment point.

6. The suspension mechanism (30) of the lawnmower according to claim 5, characterized in that, The first part of the elastic element (35) is located inside the sleeve (32), and the second part of the elastic element (35) is higher than the sleeve (32).

7. The suspension mechanism (30) of the lawnmower according to claim 6, characterized in that, The length of the first part of the elastic element (35) is greater than the length of the second part of the elastic element (35).

8. The suspension mechanism (30) of the lawnmower according to claim 1, characterized in that, The fixing frame (31) has a through hole (311) in the middle position, which communicates with the inner cavity of the sleeve (32). The top of the second support column (34) passes through the fixing frame (31) through the through hole (311) and is located inside the sleeve (32). An annular protrusion (11) extends inward on the inner side wall near the bottom of the sleeve (32). The annular protrusion (11) is located around the second support column (34).

9. The suspension mechanism (30) of the lawnmower according to claim 8, characterized in that, The bottom of the second support column (34) is provided with a fixing head (342), and the chassis (10) of the lawnmower is provided with a first sensor (12). The first sensor (12) is located below the fixing head (342) and is used to detect the displacement of the second support column (34).

10. The suspension mechanism (30) of the lawnmower according to claim 9, characterized in that, The suspension mechanism also includes a compression spring (343) disposed between the fixed head (342) and the annular protrusion (11).

11. The suspension mechanism (30) of the lawnmower according to claim 8, characterized in that, The bottom of the fixing frame (31) is also provided with an annular groove (312), which is located outside the through hole (311), and a sealing ring (313) is provided inside the annular groove (312).

12. A lawnmower (100), characterized in that, It includes a chassis (10), a housing (20) and a suspension mechanism (30), the housing (20) covering the outside of the chassis (10) and the suspension mechanism (30) for connecting the chassis (10) and the housing (20). The suspension mechanism (30) includes: A fixed frame (31) is fixedly connected to the chassis (10), and a sleeve (32) is fixedly installed on the fixed frame (31). The first support column (33) has one end connected to the outer shell (20) and the other end located inside the sleeve (32); The second support column (34) has one end connected to the chassis (10) and the other end located inside the sleeve (32) and below the first support column (33); An elastic element (35) has its two ends connected to the first support column (33) and the second support column (34) respectively, and is located inside the sleeve (32). The elastic element (35) deforms in the horizontal direction, and the elastic element (35) includes at least a first deformation stage and a second deformation stage. In the first deformation stage, the elastic element (35) deforms until it comes into contact with the top end of the sleeve (32). In the second deformation stage, the elastic element (35) is restricted by the sleeve (32). The portion of the elastic element (35) outside the sleeve (32) continues to deform. The force required for the elastic element (35) to deform in the second deformation stage is greater than the force required for deformation in the first deformation stage.

Images