Lawn mower

Abstract

The present invention discloses a lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling assembly to drive the lawn mower to travel on the ground; the lawn mower has a height adjustment mode, and when the lawn mower is in the height adjustment mode, the second motor outputs power to achieve height adjustment of the cutting assembly. The lawn mower has a simple structure and can improve the working efficiency of users.

Description

Technical Field

[0001] The present invention relates to the technical field of gardening tools, and particularly to a lawn mower. Background Art

[0002] A lawn mower is also known as a weeding machine, a grass cutting machine, a lawn trimmer, etc. A lawn mower is a mechanical tool for trimming lawns, vegetation, etc. It includes a chassis, an engine, a traveling mechanism, a cutting member, and an operating device. The engine is installed on the chassis, and the cutting member is installed on the output shaft of the engine. The cutting member uses the high-speed rotation of the engine to greatly improve the speed, saving the working time of weeding workers and reducing a large amount of human resources.

[0003] In the prior art, in order to adjust the cutting height of the lawn mower, the lawn mower is provided with a cutting height adjustment device, which specifically includes a height adjustment handle and a connecting rod assembly. When it is necessary to adjust the cutting height of the lawn mower, the user needs to manually adjust the height adjustment handle, and the height adjustment handle is then driven by the connecting rod assembly. When the user operates the height adjustment handle, a relatively large force needs to be applied to drive the chassis to change the height, which is time-consuming and laborious. Moreover, the existing height adjustment handle is usually arranged on the chassis, and the user needs to bend down to operate the height adjustment handle, reducing the work efficiency. Summary of the Invention

[0004] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a lawn mower with a simple structure and high work efficiency.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling assembly to drive the lawn mower to travel on the ground; the lawn mower has a height adjustment mode, and when the lawn mower is in the height adjustment mode, the second motor outputs power to achieve the height adjustment of the cutting assembly.

[0007] In some embodiments, the lawn mower further includes a support assembly for supporting the chassis and an adjustment assembly configured to adjust the relative position between the support assembly and the traveling assembly to achieve the height adjustment of the cutting assembly. The adjustment assembly is connected to the support assembly and the traveling assembly, and the second motor drives the adjustment assembly or the support assembly to achieve the height adjustment of the cutting assembly.

[0008] In some embodiments, the lawn mower further has a self-propelled mode, and when the lawn mower is in the self-propelled mode, the second motor drives the traveling assembly to drive the lawn mower to travel on the ground.

[0009] In some embodiments, the lawn mower further includes an operating member configured to control the start or speed change of the second motor when operated to cause the lawn mower to enter a height adjustment mode.

[0010] In some embodiments, when the lawn mower is in the height adjustment mode, the rotational speed of the second motor is less than or equal to 2,000 revolutions per minute.

[0011] In some embodiments, when the lawn mower is in the height adjustment mode, the power of the second motor is transmitted to the adjustment assembly or the support assembly through the traveling assembly to drive the movement of the adjustment assembly.

[0012] In some embodiments, the lawn mower further includes an operating member that is triggered to drive the lawn mower into the height adjustment mode when the lawn mower is in the self-propelled mode.

[0013] In some embodiments, the lawn mower further includes a controller that controls a change in the rotational speed of the second motor when the lawn mower enters the height adjustment mode from the self-propelled mode.

[0014] In some embodiments, the lawn mower further includes a locking assembly configured to lock the position of the support assembly relative to the traveling assembly when the lawn mower exits the height adjustment mode.

[0015] In some embodiments, the lawn mower further includes a detection assembly for directly or indirectly detecting the height of the cutting member.

[0016] A lawn mower includes: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling assembly to drive the lawn mower to travel on the ground; the lawn mower has a height adjustment mode, and when the lawn mower is in the height adjustment mode, the second motor outputs power to adjust the height of the cutting member.

[0017] In some embodiments, the lawn mower further includes an adjustment assembly configured to adjust the relative position between the chassis and the traveling assembly to adjust the height of the cutting member. The adjustment assembly is connected to the chassis and the traveling assembly, and the second motor drives the adjustment assembly to adjust the height of the cutting member.

[0018] A lawn mower includes: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling wheels to rotate; when the second motor is started and the external movement of the lawn mower is restricted, the second motor causes a change in the relative position between the support assembly and the traveling assembly, and the lawn mower is in the height adjustment mode.

[0019] In some embodiments, the lawn mower further includes a support assembly for supporting the chassis and an adjustment assembly configured to adjust the relative position between the support assembly and the traveling assembly to achieve height adjustment of the cutting assembly. The adjustment assembly is connected to the support assembly and the traveling assembly. When the adjustment assembly adjusts the relative position between the support assembly and the traveling assembly, the lawn mower is in the height adjustment mode.

[0020] In some embodiments, the lawn mower further has a self-propelled mode. When the lawn mower is in the self-propelled mode, the second motor drives the traveling assembly to drive the lawn mower to travel on the ground.

[0021] In some embodiments, the lawn mower further includes an operating member configured to control the start of the second motor when operated to cause the lawn mower to enter the height adjustment mode.

[0022] In some embodiments, when the lawn mower is in the height adjustment mode, the rotational speed of the second motor is less than or equal to 2000 revolutions per minute.

[0023] In some embodiments, when the lawn mower is in the height adjustment mode, the power of the second motor is transmitted to the adjustment assembly or the support assembly through the traveling assembly to drive the adjustment assembly to move.

[0024] In some embodiments, the lawn mower further includes an operating member. When the lawn mower is in the self-propelled mode, the operating member is triggered to drive the lawn mower to enter the height adjustment mode.

[0025] In some embodiments, the lawn mower further includes a controller. When the lawn mower enters the height adjustment mode from the self-propelled mode, the controller controls the rotational speed of the second motor to change.

[0026] In some embodiments, the lawn mower further includes a locking assembly configured to lock the relative position between the support assembly and the traveling assembly when the lawn mower exits the height adjustment mode.

[0027] In some embodiments, the lawn mower further includes a detection assembly for directly or indirectly detecting the height of the cutting member.

[0028] In some embodiments, the lawn mower further includes a limiting device for restricting the external movement of the lawn mower when the lawn mower enters the height adjustment mode.

[0029] A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling wheels to rotate; when the second motor is started and the external movement of the lawn mower is restricted, the second motor causes the relative position between the chassis and the traveling assembly to change, and the lawn mower is in the height adjustment mode.

[0030] In some embodiments, the lawn mower further includes a support assembly for supporting the chassis and an adjustment assembly configured to adjust the relative position between the support assembly and the traveling assembly to achieve height adjustment of the cutting assembly. The adjustment assembly is connected to the support assembly and the traveling assembly. When the adjustment assembly adjusts the relative position between the chassis and the traveling assembly, the lawn mower is in the height adjustment mode.

[0031] The beneficial effect of the present invention is that the lawn mower is driven by the second motor to adjust the height, so that the structure of the lawn mower is simple and the working efficiency of the user can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of the lawn mower;

[0033] Figure 2 is Figure 1 a perspective view of the lawn mower in

[0034] Figure 3 is Figure 2 another perspective view of the lawn mower in

[0035] Figure 4 is Figure 2 a perspective view of the lawn mower in

[0036] Figure 5 is Figure 1 a connection diagram of some electrical components of the lawn mower in

[0037] Figure 6 is Figure 4 a perspective view of the structure shown in

[0038] Figure 7 is Figure 6 a perspective view of the structure shown in

[0039] Figure 8 is Figure 1 a perspective view of the traveling assembly, adjustment assembly and support assembly of the lawn mower in

[0040] Figure 9 is Figure 8 another perspective view of the structure shown in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In the embodiments of the present application, "and / or" merely describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0042] In the embodiments of the present application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. Those of ordinary skill in the art will understand that relative terms used in conjunction with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context (e.g., the term includes at least the degree of error associated with the measurement of a particular value, the tolerances associated with a particular value (e.g., manufacturing, assembly, use), etc.). Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus a certain percentage of the indicated value (e.g., 1%, 5%, 10% or more). Of course, numerical values that do not employ relative terms should also be disclosed as specific values with tolerances.

[0043] For the convenience of explaining the technical solution of the present application, the up, down, front, back, left and right as indicated by the arrows in Figure 1 are also defined. The up, down, left and right mentioned in this embodiment are all exemplified by the state of the lawn mower in Figure 1 .

[0044] Figure 1 The lawn mower 100 shown is used for a user to cut the grass in a lawn, for example, the lawns in a garden, a golf course, etc. The grass in the lawn needs to be cared for regularly, so the lawn mower 100 needs to be used frequently for mowing. In this embodiment, the lawn mower 100 is a rear-walking working machine. When the user operates the lawn mower 100, the user stands behind the lawn mower 100 and pushes the lawn mower 100 to walk on the ground.

[0045] As Figure 1 and Figure 2 shown, the lawn mower 100 includes: a main body 100a and an operating device 100b. The operating device 100b is connected to the rear side of the main body 100a, and the operating device 100b is arranged for the user to operate. The operating device 100b includes: an operating handle 100c and a trigger switch 100d. The operating handle 100c is for the user to hold, and the trigger switch 100d is for controlling the lawn mower 100 to mow the grass.

[0046] As Figures 1 to 3As shown, the main machine 100a includes: a chassis 11, a cutting assembly 12, and a traveling assembly 13. The cutting assembly 12 includes a cutting member 121 and a first motor 122. The traveling assembly 13 includes a plurality of traveling wheels 131, 132. In this embodiment, the traveling assembly 13 includes two front traveling wheels 131 and two rear traveling wheels 132. The chassis 11 is used to support the cutting assembly 12 and the traveling assembly 13. The chassis 11 is also connected to the operating device 100b, and the chassis 11 connects the operating device 100b, the cutting assembly 12, and the traveling assembly 13 into a whole. The cutting assembly 12 is used to achieve the cutting function. An accommodation space 111 is formed on the lower side of the chassis 11, and the cutting member 121 is disposed in the accommodation space 111. In this embodiment, the cutting member 121 is a blade disposed in the accommodation space 111. The first motor 122 is mounted to the chassis 11, and the cutting member 121 is mounted to the first motor 122. The first motor 122 drives the cutting member 121 to rotate at a high speed to cut the grass in the lawn. The traveling assembly 13 can drive the lawn mower 100 to travel on the ground. The traveling assembly 13 can at least drive the lawn mower 100 to move forward, backward, and turn on the ground. The lawn mower 100 further includes a second motor 14 for driving the traveling assembly 13 to move. In this embodiment, the second motor 14 is arranged to drive the rear traveling wheels 132 to rotate to realize the traveling of the lawn mower 100 on the ground. In other embodiments, the second motor 14 can also be arranged to drive the front traveling wheels 131 to rotate. Alternatively, the lawn mower 100 includes a front motor and a rear motor. The front motor drives the front traveling wheels 131, and the rear motor drives the rear traveling wheels 132.

[0047] The lawn mower 100 has a self-propelled mode. When the lawn mower 100 is in the self-propelled mode, the second motor 14 is started, and the second motor 14 drives the traveling assembly 13 to rotate to drive the lawn mower 100 to travel on the ground. Thus, when the user needs to mow the grass, as long as the user stands behind the lawn mower 100 and follows the lawn mower 100 to walk, the lawn mower 100 is driven by the second motor 14 to move forward automatically, without the user manually pushing the lawn mower 100 to travel on the ground. Such an operation method makes it easier for the user and improves work efficiency.

[0048] When the lawn mower 100 is mowing the grass, it may be necessary to keep the grass on the lawn at a specific height after being trimmed. Therefore, it is necessary to adjust the height of the cutting member 121 relative to the ground. When the height of the cutting member 121 relative to the ground is relatively low, the height of the grass on the lawn after being cut is relatively short. In this way, the user can not mow the lawn for a longer time. When the height of the cutting member 121 relative to the ground is relatively high, the height of the grass on the lawn after being cut is relatively high. In this way, the lawn will better meet the aesthetic needs of the user. Or, the user may need to keep the grass in different areas of the lawn at different heights. In this case, the user needs to frequently adjust the height of the cutting member 121 relative to the ground.

[0049] As Figures 1 to 4 shown, the lawn mower 100 further includes an adjustment assembly 30. The adjustment assembly 30 is connected to the chassis 11 and the traveling assembly 13. The adjustment assembly 30 can adjust the relative position between the chassis 11 and the traveling assembly 13 to achieve the height adjustment of the cutting member 121. In this embodiment, the cutting assembly 12 is mounted on the chassis 11, and the height of the traveling assembly 13 relative to the ground is substantially unchanged. Therefore, when the adjustment assembly 30 changes the relative position of the chassis 11 relative to the traveling assembly 13, the position of the cutting assembly 12 mounted on the chassis 11 relative to the traveling assembly 13 also changes, so that the height of the cutting assembly 12 relative to the ground changes. In this way, the adjustment assembly 30 can adjust the height of the cutting member 121 relative to the ground. It should be noted that this relative position reflects the position change of the chassis 11 relative to the traveling assembly 13 in the vertical direction. In this way, the height of the traveling assembly 13 relative to the ground is fixed and unchanged, but the height of the chassis 11 relative to the ground changes. Or rather, this relative position at least includes the position change of the chassis 11 relative to the traveling assembly 13 in the vertical direction, and may also include the position change of the chassis 11 relative to the traveling assembly 13 in other directions. Or rather, this relative position reflects that the chassis 11 rotates relative to the traveling assembly 13, and this relative rotation causes the position of the chassis 11 relative to the traveling assembly 13 to change in the vertical direction.

[0050] The connection in this embodiment can be a direct connection or an indirect connection. A direct connection means that two parts are connected together without a middle member being provided therebetween, and an indirect connection means that two parts are respectively connected to an intermediate connecting member 313.

[0051] In this embodiment, the lawn mower 100 further has a height adjustment mode. When the lawn mower 100 is in the height adjustment mode, the second motor 14 drives the adjustment assembly 30 to adjust the height of the cutting member 121. Specifically, when the lawn mower 100 is in the height adjustment mode, the second motor 14 outputs power to adjust the height of the cutting assembly. The second motor 14 drives the adjustment assembly 30 or the support assembly 12, and the adjustment assembly 30 or the support assembly 12 adjusts the relative position between the chassis 11 and the traveling assembly 13. As a result, the height of the cutting assembly mounted on the chassis 11 relative to the ground changes. By driving the adjustment assembly 30 or the support assembly 12 with the second motor 14, there is no need for the user to manually operate the adjustment assembly 30. In this way, the user can quickly and labor-savingly adjust the height of the cutting member 121, and the working efficiency is greatly improved. Moreover, the second motor 14 itself can drive the traveling assembly 13 to drive the lawn mower 100 to travel on the ground. That is to say, the second motor 14 can both realize the function of driving the lawn mower 100 to travel on the ground and the function of driving the adjustment assembly 30 to move to adjust the height of the cutting member 121. The lawn mower 100 utilizes the second motor 14 that drives the traveling assembly 13, without the need for an additional drive mechanism for driving the adjustment assembly 30, making the structure simpler, the cost lower, and saving more space on the chassis 11 of the lawn mower 100.

[0052] When it is necessary to adjust the height of the cutting member 121, the user first starts the second motor 14 and at the same time restricts the external movement of the lawn mower 100. At this time, the second motor 14 can drive the adjustment assembly 30 to move. The adjustment assembly 30 adjusts the relative position between the chassis 11 and the traveling assembly 13. At this time, the lawn mower 100 is in the height adjustment mode, and the height of the cutting member 121 relative to the ground changes. In this way, when the second motor 14 drives the adjustment assembly 30 to perform height adjustment in an electric manner, the external movement of the lawn mower 100 relative to the ground is restricted, which can enable the lawn mower 100 to perform height adjustment more stably and avoid danger during the height adjustment process of the lawn mower 100. Moreover, compared with the height adjustment mechanism of traditional lawn mowers, by using the second motor 14 to adjust the height of the cutting member 121, the user does not need to leave the assembly and bend down to operate the height adjustment mechanism, improving the working efficiency.

[0053] It should be noted that the external movement of the lawn mower 100 refers to the movement of the whole or a particle of the lawn mower 100 relative to the ground when the lawn mower 100 is regarded as a whole or a particle. For example, the forward, backward or turning of the lawn mower 100 on the ground can be considered as the external movement of the lawn mower 100. The movement of the chassis 11 relative to the traveling assembly 13 is considered as the internal movement of the lawn mower 100, and the idling movement of the traveling wheels 131 and 132 is also considered as the internal movement of the lawn mower 100, and the movement of the height adjustment assembly relative to the traveling assembly 13 is also considered as the internal movement of the lawn mower 100.

[0054] The lawn mower 100 further includes a support assembly 15 for supporting the chassis 11, and an adjustment assembly 30 connects the support assembly 15 and the traveling assembly 13. When the adjustment assembly 30 is driven by the second motor 14, it can adjust the relative position between the support assembly 15 and the traveling assembly 13, thereby realizing the position change of the chassis 11 relative to the traveling assembly 13.

[0055] In this embodiment, when the lawn mower 100 is in the self-propelled mode, the second motor 14 drives the traveling assembly 13 to rotate to drive the lawn mower 100 to travel on the ground. That is to say, at this time, the traveling wheels 131 and 132 can both rotate around their own rotation axes and can also move relative to the ground. When the lawn mower 100 is in the height adjustment mode, the second motor 14 also drives the traveling assembly 13, but the external movement of the lawn mower 100 relative to the ground is restricted, so that the traveling wheels 131 and 132 cannot move relative to the ground. Thus, when the lawn mower 100 is in the self-propelled mode, if the user needs to adjust the height of the cutting member 121 at this time, the user only needs to switch the lawn mower 100 to the height adjustment mode and restrict the external movement of the lawn mower 100, and the second motor 14 can drive the adjustment assembly 30 to change the position of the chassis 11 relative to the traveling assembly 13. After the height of the cutting member 121 is adjusted, the user only needs to switch the lawn mower 100 to the self-propelled mode and release the lawn mower 100 to allow the traveling wheels 131 and 132 to move relative to the ground. At this time, the user can use the self-propelled function of the lawn mower 100 again. In this way, when the user uses the lawn mower 100, the user can switch to the height adjustment mode at any time to adjust the height of the cutting member 121, so that the lawn mower 100 can freely switch between the self-propelled mode and the height adjustment mode, greatly improving the work efficiency.

[0056] The lawn mower 100 further includes an operating member 16 for the user to operate. When the lawn mower 100 is not started, the lawn mower 100 is in a stopped state and is held in a stationary state. At this time, the user operates the operating member 16, and the operating member 16 controls the second motor 14 to start. The external movement of the lawn mower 100 is basically restricted. The started second motor 14 drives the adjustment assembly 30 to adjust the relative position between the support assembly 15 and the traveling assembly 13, and the lawn mower 100 enters the height adjustment mode. When the lawn mower 100 is in the height adjustment mode, the rotational speed of the second motor 14 is less than or equal to 2000 revolutions per minute. In this way, the height of the cutting member 121 can be adjusted more stably. The rotational speed of the second motor 14 in the height adjustment mode is less than the rotational speed of the second motor 14 in the self-propelled mode. In this way, after the rotational speed of the second motor 14 is reduced, the height adjustment can be more stable.

[0057] In this embodiment, the operating member 16 is arranged on the operating device 100c, which is convenient for the user to operate. The user does not need to leave the operating device 100c, and the user's hand can touch the operating member 16, and the user does not need to bend down to operate, which improves the convenience of operation. Further, the operating member 16 is arranged on the operating handle 100c, so that the user can touch the operating member 16 without leaving the operating handle 100c. In other embodiments, the position of the operating member 16 can be arranged at a position that is convenient for other users to touch. The position of the operating member 16 can be set to a relatively small distance from the operating handle 100c, which can facilitate user operation. For example, the operating handle 100c includes a gripping portion 100e extending in a direction parallel to the rotation axis of the rear walking wheel 132, and the minimum distance between the operating member 16 and the gripping portion 100e can be set to be less than or equal to 50 cm, which is also convenient for user operation. Alternatively, in other embodiments, the operating member can also be arranged on the host.

[0058] When the lawn mower 100 is in the self-propelled mode, the user operates the operating member 16 to exit the self-propelled mode and the external movement of the lawn mower 100 is basically restricted. At this time, the operating member 16 controls the second motor 14 to change the speed, and the second motor 14 drives the adjustment component 30 to adjust the relative position between the support component 15 and the travel component 13, and the lawn mower 100 enters the height adjustment mode.

[0059] Alternatively, when the lawn mower 100 is in the self-propelled mode, the lawn mower 100 walks on the ground. At this time, the user restricts the external movement of the lawn mower 100, and the running wheels 131 and 132 begin to idle. At this time, the second motor 14 can also drive the adjustment component 30 to adjust the relative position between the support component 15 and the running component 13, and the lawn mower 100 enters the height adjustment mode. When the lawn mower 100 is in the height adjustment mode, the rotation speed of the running wheels 131 and 132 is less than or equal to 50 rpm, so that the lawn mower 100 can slowly and stably achieve height adjustment. Alternatively, in other embodiments, when the lawn mower 100 is in the height adjustment mode, the rotation speed of the running wheels 131 and 132 is less than or equal to 30 rpm. Alternatively, in other embodiments, when the lawn mower 100 is in the height adjustment mode, the rotation speed of the running wheels 131 and 132 is less than or equal to 20 rpm.

[0060] Alternatively, when the lawn mower 100 is in the self-propelled mode, the lawn mower 100 moves on the ground. At this time, when the user restricts the external movement of the lawn mower 100, the driving wheels 131 and 132 start to spin idly. At this time, when it is detected that the external movement of the lawn mower 100 is restricted, the second motor 14 can also change its speed to drive the adjustment assembly 30 to adjust the relative position between the support assembly 15 and the traveling assembly 13, and the lawn mower 100 enters the height adjustment mode. In this embodiment, the lawn mower 100 further includes a controller 17. When the operating member 16 is operated to make the lawn mower 100 enter the height adjustment mode from the self-propelled mode, the controller 17 controls the rotational speed of the second motor 14 to change. For example, the controller 17 can control the rotational speed of the second motor 14 to decrease, so that the lawn mower 100 is more stable in the height adjustment mode.

[0061] In this embodiment, whether the lawn mower 100 is in the self-propelled mode or in the height adjustment mode, the second motor 14 drives the traveling assembly 13. The only difference is whether the movement of the traveling assembly 13 relative to the ground is restricted. The adjustment assembly 30 is connected to the support assembly 15 and the traveling assembly 13, and what the adjustment assembly 30 changes is the relative position between the support assembly 15 and the traveling assembly 13. In fact, in this embodiment, when the lawn mower 100 is in the height adjustment mode, the power of the second motor 14 is transmitted to the adjustment assembly 30 through the traveling assembly 13 to drive the adjustment assembly 30 to move, and then the moving adjustment assembly 30 drives the relative position between the support assembly 15 and the traveling assembly 13 to change. That is to say, the power source of the adjustment assembly 30 in this embodiment is transmitted from the traveling assembly 13. The transmission path is that the power is transmitted from the second motor 14 to the traveling assembly 13, and the traveling assembly 13 then transmits the power to the adjustment assembly 30. In this way, there is no need to separately provide a transmission mechanism for transmitting the power of the second motor 14 to the adjustment assembly 30, which makes the structure of the lawn mower 100 simpler, the cost lower, and does not occupy the space near the chassis 11.

[0062] The lawn mower 100 further includes a detection assembly 18 and a locking assembly 19. The detection assembly 18 is used to detect the height of the cutting member 121, so that the height adjustment of the cutting member 121 can be more accurate. The detection assembly 18 can directly detect the height of the cutting member 121.

[0063] In other embodiments, the detection assembly 18 can also indirectly detect the height of the cutting member 121. For example, the detection assembly 18 can detect the height of the chassis 11 relative to the ground to detect the height of the cutting member 121. Alternatively, the detection assembly 18 can also detect the position of the support assembly 15 relative to the traveling assembly 13 to detect the height of the cutting member 121. In fact, the detection assembly 18 can detect the position of any part that can reflect the change in the height of the cutting member 121 to indirectly detect the height of the cutting member 121.

[0064] The locking component 19 is used to lock the movement of the support component 15 relative to the traveling component 13 so that the position of the support component 15 is fixed. When the detection component 18 detects that the height of the cutting member 121 reaches the set height, the lawn mower 100 exits the height adjustment mode, and at this time, the locking component 19 locks the position of the support component 15 relative to the traveling component 13. This can make the cutting member 121 more stably maintained at the set height.

[0065] In other embodiments, the lawn mower 100 may further include a limiting device, and the limiting device is configured to limit the external movement of the lawn mower 100 when the lawn mower 100 enters the height adjustment mode. The limiting device may be a limiting pin provided on the chassis 11 of the lawn mower 100. When the limiting pin contacts the ground downward, a relatively large resistance can be generated, thereby limiting the external movement of the lawn mower 100 relative to the ground.

[0066] Specifically, as Figures 4 to 8 shown, the support component 15 includes a front crankshaft 151 and a rear crankshaft 152. The front end of the chassis 11 is supported on the front crankshaft 151, and the front crankshaft 151 is connected to the front end of the chassis 11. The support component 15 further includes a support member 153, and the support member 153 supports the rear end of the chassis 11. The lawn mower 100 further includes a drive shaft 21 for driving the traveling component 13 to rotate. The drive shaft 21 is connected to the second motor 14, and the drive shaft 21 is also connected to the traveling component 13. The second motor 14 drives the drive shaft 21 to rotate, and the drive shaft 21 then transmits the power to the traveling component 13. The drive shaft 21 is parallel to the rear crankshaft 152, and the drive shaft 21 is also parallel to the front crankshaft 151. The support member 153 is rotatably mounted on the drive shaft 21 through a bearing.

[0067] The lawn mower 100 further includes a gear assembly 22 that transmits the power output by the drive shaft 21 to the rear traveling wheel 132. The gear assembly 22 is at least partially disposed inside the rear traveling wheel 132. When the lawn mower 100 is in the self-propelled mode, the second motor 14 drives the drive shaft 21 to rotate, the drive shaft 21 drives the gear assembly 22 to rotate, and the gear assembly 22 drives the rear traveling wheel 132 to rotate. At this time, the lawn mower 100 can travel on the ground.

[0068] The adjustment component 30 includes: a connecting rod assembly 31, a front connecting member 32, and a rear connecting member 33. The connecting rod assembly 31 connects the front connecting member 32 and the rear connecting member 33. As Figure 8As shown, when the connecting rod assembly 31 is regarded as a whole, the connecting rod assembly 31, the front connecting piece 32, the rear connecting piece 33 and the chassis 11 form the four sides of a parallelogram P1. Among them, the connection line of the support piece 153 and the front crankshaft 151 in the front and rear directions is equivalent to the chassis 11. The rear connecting piece 33 has a first connection point 331, a second connection point 332 and a third connection point 333. The first connection point 331 is connected to the rear crankshaft 152, the second connection point 332 is connected to the rear traveling wheel 132, and the third connection point 333 is connected to the support piece 153.

[0069] When the lawn mower 100 is in the height adjustment mode, the second motor 14 transmits power to the traveling assembly 13 through the drive shaft 21. However, at this time, the external movement of the lawn mower 100 is restricted, that is, the movement of the traveling assembly 13 on the ground is restricted. In this way, the traveling assembly 13 will generate a reverse torque, which is transmitted to the rear connecting piece 33 and drives the rear connecting piece 33 to rotate about the second connection point 332. In this way, the position of the parallelogram P1 changes, and the side of the parallelogram P1 formed by the rear connecting piece 33 will also change in inclination, so that the phase position of the chassis 11 relative to the traveling assembly 13 changes. At this time, the height of the traveling assembly 13 relative to the ground is actually unchanged, so the change in the relative position will reflect the change in the position of the chassis 11 relative to the ground, and finally the height adjustment of the cutting member 121 is realized.

[0070] In this embodiment, the height adjustment of the cutting member 121 is realized by the reverse torque generated by the traveling assembly 13, without additionally setting a driving mechanism and a transmission mechanism, so that the structure is simpler, the cost is lower, and the operation is more convenient.

[0071] When the lawn mower 100 is in the height adjustment mode, if the second motor 14 rotates forward, the height of the chassis 11 can be increased, and if the second motor 14 rotates in reverse, the height of the chassis 11 can be decreased. Or, in other embodiments, when the lawn mower 100 is in the height adjustment mode, if the second motor 14 rotates forward, the height of the chassis 11 can be decreased, and if the second motor 14 rotates in reverse, the height of the chassis 11 can be increased.

[0072] Such as Figure 9As shown, the connecting rod assembly 31 may further include a first connecting rod 311, a second connecting rod 312, and an intermediate connecting member 313. Among them, the intermediate connecting member 313 is connected to the chassis 11, and the locking assembly 19 can lock the chassis 11 at a suitable height through the intermediate connecting member 313. The first connecting rod 311 connects the intermediate connecting member 313 and the rear connecting member 33, and the second connecting rod 312 connects the intermediate connecting member 313 and the front connecting member 32. In this way, the first connecting rod 311, the intermediate connecting member 313, the rear connecting member 33, and the chassis 11 form a parallelogram P2, and the second connecting rod 312, the intermediate connecting member 313, the front connecting member 32, and the chassis 11 form another parallelogram P3. Similarly, through the position changes and shape changes of these two parallelograms P2 and P3, the height adjustment of the chassis 11 is also achieved, and the principle is the same as the position change and shape change principle of the parallelogram P1 above.

[0073] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

Claims

1. A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling assembly to drive the lawn mower to travel on the ground; the lawn mower has a height adjustment mode, and when the lawn mower is in the height adjustment mode, the second motor outputs power to adjust the height of the cutting assembly.

2. The lawn mower according to claim 1, wherein, the lawn mower further includes a support assembly for supporting the chassis and an adjustment assembly configured to adjust the relative position between the support assembly and the traveling assembly to adjust the height of the cutting assembly, the adjustment assembly connects the support assembly and the traveling assembly, and the second motor drives the adjustment assembly or the support assembly to adjust the height of the cutting assembly.

3. The lawn mower according to claim 1, wherein, the lawn mower further has a self - traveling mode, and when the lawn mower is in the self - traveling mode, the second motor drives the traveling assembly to drive the lawn mower to travel on the ground.

4. The lawn mower according to claim 1, wherein, the lawn mower further includes an operating member, and the operating member is configured to control the start or speed change of the second motor when operated to cause the lawn mower to enter the height adjustment mode.

5. The lawn mower according to claim 1, wherein, when the lawn mower is in the height adjustment mode, the rotational speed of the second motor is less than or equal to 2000 revolutions per minute.

6. The lawn mower according to claim 2, wherein, when the lawn mower is in the height adjustment mode, the power of the second motor is transmitted to the adjustment assembly or the support assembly through the traveling assembly to drive the adjustment assembly to move.

7. The lawn mower according to claim 3, wherein, the lawn mower further includes an operating member, and when the lawn mower is in the self - traveling mode, the operating member is triggered to drive the lawn mower to enter the height adjustment mode.

8. The lawn mower according to claim 7, wherein, the lawn mower further includes a controller, and when the lawn mower enters the height adjustment mode from the self - traveling mode, the controller controls the rotational speed of the second motor to change.

9. The lawn mower according to claim 2, wherein, the lawn mower further includes a locking assembly, and the locking assembly is configured to lock the position of the support assembly relative to the traveling assembly when the lawn mower exits the height adjustment mode.

10. The lawn mower according to claim 1, wherein, the lawn mower further includes a detection assembly for directly or indirectly detecting the height of the cutting member.

11. A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis for supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling assembly to drive the lawn mower to travel on the ground; The lawn mower has a height adjustment mode. When the lawn mower is in the height adjustment mode, the second motor outputs power to adjust the height of the cutting member.

12. The lawn mower according to claim 11, wherein, the lawn mower further includes an adjustment assembly configured to adjust the relative position between the chassis and the traveling assembly to adjust the height of the cutting member. The adjustment assembly connects the chassis and the traveling assembly, and the second motor drives the adjustment assembly to adjust the height of the cutting member.

13. A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis supporting the cutting assembly; a supporting assembly supporting the chassis; a traveling assembly including traveling wheels; a second motor capable of driving at least the traveling wheels to rotate; When the second motor is started and the external movement of the lawn mower is restricted, the second motor causes a change in the relative position between the supporting assembly and the traveling assembly, and the lawn mower is in the height adjustment mode.

14. The lawn mower according to claim 13, wherein, the lawn mower further includes an adjustment assembly configured to adjust the relative position between the supporting assembly and the traveling assembly to adjust the height of the cutting assembly. The adjustment assembly connects the supporting assembly and the traveling assembly. When the adjustment assembly adjusts the relative position between the supporting assembly and the traveling assembly, the lawn mower is in the height adjustment mode.

15. The lawn mower according to claim 13, wherein, the lawn mower further has a self-propelled mode. When the lawn mower is in the self-propelled mode, the second motor drives the traveling assembly to drive the lawn mower to travel on the ground.

16. The lawn mower according to claim 13, wherein, the lawn mower further includes an operating member configured to control the start of the second motor when operated to cause the lawn mower to enter the height adjustment mode.

17. The lawn mower according to claim 13, wherein, when the lawn mower is in the height adjustment mode, the rotational speed of the second motor is less than or equal to 2000 revolutions per minute.

18. The lawn mower according to claim 14, wherein, when the lawn mower is in the height adjustment mode, the power of the second motor is transmitted to the adjustment assembly or the supporting assembly through the traveling assembly to drive the adjustment assembly to move.

19. The lawn mower according to claim 15, wherein, the lawn mower further includes an operating member. When the lawn mower is in the self-propelled mode, the operating member is triggered to drive the lawn mower to enter the height adjustment mode.

20. The lawn mower according to claim 19, wherein, the lawn mower further includes a controller. When the lawn mower enters the height adjustment mode from the self-propelled mode, the controller controls a change in the rotational speed of the second motor.

21. The lawn mower according to claim 14, wherein, The lawn mower further includes a locking assembly configured to lock the relative position between the support assembly and the traveling assembly when the lawn mower exits the height adjustment mode.

22. The lawn mower according to claim 13, wherein, the lawn mower further includes a detection assembly for directly or indirectly detecting the height of the cutting member.

23. The lawn mower according to claim 13, wherein, the lawn mower further includes a limiting device for restricting the external movement of the lawn mower when the lawn mower enters the height adjustment mode.

24. A lawn mower, comprising: a cutting assembly including a first motor for driving a cutting member to rotate; a chassis supporting the cutting assembly; a traveling assembly including traveling wheels; a second motor capable of at least driving the traveling wheels to rotate; when the second motor is started and the external movement of the lawn mower is restricted, the second motor causes a change in the relative position between the chassis and the traveling assembly, and the lawn mower is in the height adjustment mode.

25. The lawn mower according to claim 24, wherein, the lawn mower further includes a support assembly for supporting the chassis and an adjustment assembly configured to adjust the relative position between the support assembly and the traveling assembly to achieve height adjustment of the cutting assembly, the adjustment assembly connecting the support assembly and the traveling assembly, and when the adjustment assembly adjusts the relative position between the chassis and the traveling assembly, the lawn mower is in the height adjustment mode.

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