Cutting device and mower

Abstract

A cutting device, comprising a cutting mechanism (7) and a height adjusting mechanism. The height adjusting mechanism comprises a first driving member (1) and a swing arm (2), wherein the first driving member (1) is connected to the swing arm (2) so as to drive the swing arm (2) to rotate. The cutting mechanism (7) is arranged on the swing arm (2), so that when the swing arm (2) rotates, the cutting mechanism (7) is driven to ascend or descend. Also disclosed is a mower comprising the cutting device, which allows for an adjustable mowing height.

Description

Cutting devices and lawn mowers Technical Field

[0001] The present application relates to the technical field of lawn mowers, and in particular to a cutting device and a lawn mower. Background Art

[0002] A lawn mower is a mechanical tool used to trim grass and vegetation. In related art, the cutting mechanism is fixed to the mower body, so that the height of the cutting mechanism relative to the ground is fixed, and thus the cutting height is also fixed. However, different users often have different requirements for cutting height. Technical issues

[0003] The technical problem to be solved by the present application is to provide a cutting device and a lawn mower to solve the problem that the existing lawn mowers cannot adjust the cutting height. Technical Solutions

[0004] In order to solve the above technical problems, on the first aspect, the present application provides a cutting device, which includes a cutting mechanism and a height adjustment mechanism, the height adjustment mechanism includes a first driving member and a swing arm, the first driving member is connected to the swing arm to drive the swing arm to rotate, and the cutting mechanism is arranged on the swing arm so that the cutting mechanism is driven to rise or fall when the swing arm rotates.

[0005] Optionally, the cutting mechanism rests on the swing arm.

[0006] Optionally, the height adjustment mechanism further includes a transmission assembly, a power input end of the transmission assembly is connected to the first driving member, and a power output end of the transmission assembly is connected to the swing arm.

[0007] Optionally, the transmission assembly includes a worm and a gear, the first driving member is connected to the worm to drive the worm to rotate, the worm is engaged with the gear, and the gear is connected to the swing arm to drive the swing arm to rotate.

[0008] Optionally, the transmission assembly further includes a rotating shaft, which is disposed on the gear and connected to the swing arm.

[0009] Optionally, the rotation axis of the worm is perpendicular to the rotation axis of the swing arm.

[0010] Optionally, the height adjustment mechanism also includes a fixed seat, the fixed seat is provided with a first cavity and a second cavity that penetrate each other, the fixed seat is provided with an opening connecting the second cavity with the outside world, the transmission assembly is arranged in the first cavity, the swing arm includes a rotating body and a support arm, the rotating body is arranged in the second cavity, the support arm includes a fixed end and a free end, the fixed end is fixed on the rotating body, the free end extends through the opening to the outside of the second cavity, and the cutting mechanism is arranged on the free end.

[0011] Optionally, a roller is further included, and the roller is arranged on the free end.

[0012] Optionally, the first driving member includes a height adjustment motor, which is arranged on the fixing seat and outside the first cavity. A avoidance hole is opened on the fixing seat, and the output shaft of the height adjustment motor passes through the avoidance hole, and the output shaft is connected to the power input end of the transmission assembly.

[0013] Optionally, the cutting mechanism includes a mounting seat, a second driving member and a cutting member, the mounting seat is arranged on the swing arm, the second driving member is arranged on the mounting seat, the cutting member is connected to the second driving member, and the second driving member is used to drive the cutting member to move.

[0014] Optionally, a limiting mechanism is further included, wherein the limiting mechanism is connected to the mounting seat, and the limiting mechanism and the swing arm are respectively located on opposite sides of the mounting seat.

[0015] Optionally, the limiting mechanism includes a connecting rod assembly, the connecting rod assembly includes at least one connecting rod, and one end of the connecting rod is rotatably connected to the mounting seat.

[0016] Optionally, the limiting mechanism further includes a connecting seat, and the other end of the connecting rod is rotatably connected to the connecting seat.

[0017] In a second aspect, the present application provides a lawn mower, comprising a lawn mower body and the above-mentioned cutting device, wherein the cutting device is arranged on the lawn mower body.

[0018] Optionally, the lawn mower body includes a chassis, and the cutting device is detachably mounted on the chassis.

[0019] Optionally, a groove with an opening facing the ground is provided on the chassis, and the cutting device is arranged in the groove.

[0020] Optionally, a controller is provided on the lawn mower body, and the first driving member is electrically connected to the controller. The lawn mower further comprises a detection mechanism, which is electrically connected to the controller and is used to detect the position of the cutting mechanism.

[0021] Optionally, when the height adjustment mechanism further includes a transmission assembly, the transmission assembly includes a worm and a gear, the first driving member is connected to the worm, the worm is meshed with the gear, and the gear is connected to the swing arm, the detection mechanism includes a first sensing assembly, the first sensing assembly includes a first magnet, a first sensing sensor and a second sensing sensor, the first magnet is arranged on the gear, the first sensing sensor and the second sensing sensor are arranged at intervals on the lawn mower body, and the first sensing sensor and the second sensing sensor are both electrically connected to the controller, wherein, when the cutting mechanism is in the highest position, the first magnet triggers the first sensing sensor; when the cutting mechanism is in the lowest position, the first magnet triggers the second sensing sensor.

[0022] Optionally, the detection mechanism also includes a second sensing component, the second sensing component includes a second magnet arranged on the cutting device and a third sensing sensor arranged on the lawn mower body, the third sensing sensor is electrically connected to the controller, and when the cutting mechanism is in the lowest position and / or the highest position, the second magnet triggers the third sensing sensor.

[0023] Optionally, the second magnet is provided on the worm, so that the worm drives the second magnet to rotate. Beneficial effects

[0024] The beneficial effect of the present application is that the cutting device provided by the present application drives the swing arm to rotate through the first driving member, and when the swing arm rotates, the cutting mechanism is driven to rise and fall, thereby realizing the adjustment of the cutting height of the lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of the three-dimensional structure of a cutting device provided in one embodiment of the present application;

[0026] FIG2 is a schematic diagram of the front view of a cutting device provided in one embodiment of the present application;

[0027] FIG3 is a schematic diagram of the three-dimensional structure of a height adjustment mechanism in a cutting device provided in one embodiment of the present application;

[0028] FIG4 is a schematic diagram of an exploded structure of a height adjustment mechanism in a cutting device provided in one embodiment of the present application;

[0029] FIG5 is a schematic cross-sectional view of a height adjustment mechanism in a cutting device according to an embodiment of the present application;

[0030] FIG6 is a schematic diagram of the three-dimensional structure of a mounting base in a cutting device provided in an embodiment of the present application, showing that a cutting motor is installed in the mounting base;

[0031] FIG7 is a schematic diagram of the three-dimensional structure of a cutter disc of a cutting mechanism in a cutting device provided in one embodiment of the present application;

[0032] FIG8 is a schematic diagram of the three-dimensional structure of a connecting rod assembly in a cutting device provided in one embodiment of the present application;

[0033] FIG9 is a schematic diagram of an exploded structure of a connecting rod assembly in a cutting device provided in one embodiment of the present application;

[0034] FIG10 is a schematic diagram of the overall structure of a lawn mower provided in one embodiment of the present application;

[0035] FIG11 is a schematic structural diagram of a first sensing component and a second sensing component of a lawn mower provided in an embodiment of the present application.

[0036] Description of labels:

[0037] 1. A first driving member;

[0038] 2. Swing arm; 21. Rotating body; 22. Support arm; 221. Fixed end; 222. Free end; 23. Roller;

[0039] 3. Transmission assembly; 31. Worm; 311. Thread; 32. Gear; 321. Teeth; 322. Rotating shaft; 323. Spline;

[0040] 4. First induction component; 41. First magnet; 43. First induction sensor; 42. Second induction sensor;

[0041] 5. Second induction component; 51. Second magnet; 52. Third induction sensor;

[0042] 6. Fixed seat; 61. First cavity; 62. Second cavity; 63. Opening;

[0043] 7. Cutting mechanism; 71. Mounting seat; 72. Second driving member; 73. Cutting member; 731. Blade; 732. Cutting disc; 74. Disc guard;

[0044] 8. Connecting rod assembly; 81. First connecting rod; 82. Second connecting rod; 83. Connecting seat; 84. Spring. Modes for Carrying Out the Invention

[0045] In order to explain the technical content, achieved objectives and effects of this application in detail, the following is an explanation in conjunction with the implementation methods and the accompanying drawings.

[0046] Please refer to Figures 1 to 11. The present application provides a cutting device, which includes a cutting mechanism 7 and a height adjustment mechanism. The height adjustment mechanism includes a first driving member 1 and a swing arm 2. The first driving member 1 is connected to the swing arm 2 to drive the swing arm 2 to rotate. The cutting mechanism 7 is arranged on the swing arm 2 so that the cutting mechanism 7 is driven to rise or fall when the swing arm 2 rotates.

[0047] When the cutting device provided in the present application is working, since the swing arm 2 is connected to the first driving member 1, the first driving member 1 can drive the swing arm 2 to rotate up and down, and the cutting mechanism 7 is arranged on the swing arm 2, so that the swing arm 2 can drive the cutting mechanism 7 to rise or fall; wherein, when the first driving member 1 drives the swing arm 2 to rotate upward, the swing arm 2 drives the cutting mechanism 7 to rise; when the first driving member 1 drives the swing arm 2 to rotate downward, the swing arm 2 drives the cutting mechanism 7 to descend; in this way, by utilizing the first driving member 1 to drive the swing arm 2 to rotate and thereby drive the cutting mechanism 7 to rise and fall, the height of the cutting mechanism 7 can be adjusted, that is, the mowing height can be adjusted.

[0048] The cutting device provided in this application can be used on a lawn mower, which includes a lawn mower body and a cutting device disposed on the lawn mower body. For example, the height adjustment mechanism is fixedly connected to the lawn mower body, while the cutting mechanism 7 and the lawn mower body can be movably connected, or the cutting mechanism 7 and the lawn mower body have no direct connection, and the cutting mechanism 7 is connected only to the height adjustment mechanism.

[0049] Optionally, in other embodiments of the present application, the first driving member 1 may be a device with a traction function, such as a motor or a cylinder.

[0050] In some embodiments, the cutting mechanism 7 rests on the swing arm 2. That is, the swing arm 2 supports the cutting mechanism 7, but relative displacement can also occur between the cutting mechanism 7 and the swing arm 2. In actual application, since the lawn is not absolutely flat, in most cases, there will be some ground protrusions on the lawn, such as stones or lawn bumps. When the lawn mower encounters these ground protrusions during mowing, the cutting mechanism 7 may conflict with the ground protrusions. Under the interference of the ground protrusions, the cutting mechanism 7 can produce an upward displacement relative to the swing arm 2, so that the cutting mechanism 7 can pass through the ground protrusions; after the cutting mechanism 7 passes the ground protrusions, the cutting mechanism 7 can produce a downward displacement relative to the swing arm 2 under the action of gravity, so that the cutting mechanism 7 is restored to the position resting on the swing arm 2. From the above description, it can be seen that the cutting device provided by the present application can improve the ability of the lawn mower to pass through ground obstacles.

[0051] In other embodiments of the present application, the cutting device and the swing arm 2 may also be movably connected. For example, a guide rail may be provided on the swing arm 2, and the cutting mechanism 7 may be slidably connected to the guide rail so that the cutting mechanism 7 can slide upward along the guide rail under the interference of the ground protrusion; or, a rotating shaft may be connected between the cutting mechanism 7 and the swing arm 2 so that the rotating shaft can rotate relative to the cutting mechanism 7 and the swing arm 2 respectively under the interference of the ground protrusion, and the cutting mechanism 7 can be displaced upward relative to the swing arm 2; or, the swing arm 2 and the cutting mechanism 7 may be connected by an elastic member so that the elastic member can be elastically deformed under the action of the ground protrusion, and the cutting mechanism 7 can be displaced upward relative to the swing arm 2.

[0052] In some embodiments, in order to enrich the position layout between the height adjustment mechanism and the swing arm 2 and optimize the structure of the entire cutting device, the height adjustment mechanism also includes a transmission component 3, the power input end of the transmission component 3 is connected to the first drive member 1, and the power output end of the transmission component 3 is connected to the swing arm 2.

[0053] Optionally, the transmission component 3 can be but is not limited to: at least one of a gear 32 transmission component 3, a belt transmission component 3, and a worm gear 31 transmission component 3. The type of the transmission component 3 can be selected according to actual application requirements.

[0054] Based on the above embodiment, in some specific embodiments, please refer to Figure 4, the transmission assembly 3 includes a worm 31 and a gear 32. The first driving member 1 is connected to the worm 31 to drive the worm 31 to rotate. The worm 31 meshes with the gear 32, and the gear 32 is connected to the swing arm 2 to drive the swing arm 2 to rotate. When the first driving assembly drives the worm 31 to rotate, the worm 31 drives the gear 32 to rotate, and a worm gear assembly is formed between the worm 31 and the gear 32. The worm gear assembly has a self-locking feature. That is, when the first driving assembly stops working, the worm 31 and the gear 32 can be relatively fixed, so that the transmission assembly 3 can lock the rotation angle of the swing arm 2 and fix the lifting height of the cutting device.

[0055] Alternatively, the transmission mechanism may also replace the worm 31 and the gear 32 by other mechanisms with a self-locking function, such as a pawl and a ratchet.

[0056] Furthermore, in some embodiments, as shown in FIG4 , the transmission assembly 3 further includes a rotating shaft 322, which is disposed on the gear 32 and connected to the swing arm 2. Specifically, to facilitate assembly, a spline 323 may be provided at the end of the rotating shaft 322, and a groove may be provided on the swing arm 2 to cooperate with the spline 323.

[0057] Based on the above embodiment, the rotation axis 322 of the worm 31 is perpendicular to the rotation axis 322 of the swing arm 2. In other words, the transmission assembly 3 has a power reversing function, which can improve the compactness of the height adjustment mechanism structure and help save the width space required for assembling the height adjustment mechanism.

[0058] In some embodiments, referring to Figures 3, 4 and 5, the height adjustment mechanism also includes a fixed seat 6, which is provided with a first cavity 61 and a second cavity 62 that are interconnected, and an opening 63 is provided on the fixed seat 6 to connect the second cavity 62 with the outside world. The transmission assembly 3 is disposed in the first cavity 61, the swing arm 2 includes a rotating body 21 and a support arm 22, the rotating body 21 is disposed in the second cavity 62, the support arm 22 includes a fixed end 221 and a free end 222, the fixed end 221 is fixed on the rotating body 21, the free end 222 extends through the opening 63 to the outside of the second cavity 62, and the cutting mechanism 7 is disposed on the free end 222.

[0059] Among them, the structures between the transmission component 3, the fixed seat 6 and the rotating body 21 cooperate with each other to make the first cavity 61 have a certain degree of sealing; for example: in some specific embodiments, as shown in Figure 5, the worm 31 and the gear 32 of the transmission component 3 can be arranged in the first cavity 61, and a through hole penetrating the first cavity 61 and the second cavity 62 can be opened in the fixed seat 6, and the rotating shaft 322 of the rotating component can pass through the through hole, and one end of the rotating shaft 322 is arranged on the gear 32, and the other end of the rotating shaft 322 is connected to the swing arm 2, wherein the rotating shaft 322 has a blocking effect on the through hole, so that the first cavity 61 forms a sealed cavity, and when the cutting device is mowing, grass clippings will not enter the first cavity 61, thereby avoiding the grass clippings from causing adverse effects on the transmission mechanism.

[0060] Furthermore, based on the above embodiment, in order to reduce the friction resistance between the support arm 22 and the cutting mechanism 7 and avoid the jamming of the height adjustment mechanism when controlling the cutting mechanism 7 to rise or fall, the swing arm 2 also includes a roller 23, which is arranged on the free end 222.

[0061] In some specific embodiments, the cutting mechanism 7 rests on the roller 23 of the swing arm 2. When the swing arm 2 rotates upward or downward, the swing arm 2 can more easily slide relative to the cutting mechanism 7 through the roller 23, thereby improving the smoothness of the lifting and lowering action of the cutting device.

[0062] Optionally, a limiting groove can be provided on the side of the cutting mechanism 7 close to the swing arm 2, and the roller 23 is at least partially provided in the limiting groove to prevent the roller 23 from falling off from the cutting mechanism 7 when the height adjustment structure drives the swing arm 2 to rotate.

[0063] In other optional embodiments of the present application, the roller 23 may also be provided on the cutting mechanism 7 , and when the cutting mechanism 7 rests on the swing arm 2 , the roller 23 provided on the cutting mechanism 7 contacts the swing arm 2 .

[0064] Optionally, based on the above embodiment, the first drive member 1 includes a height adjustment motor, which is mounted on the fixing base 6 and located outside the first cavity 61. The fixing base 6 has a clearance hole, through which the output shaft of the height adjustment motor passes. The output shaft is connected to the power input of the transmission assembly 3. The output shaft of the height adjustment motor passes through the clearance hole to connect to the power input of the transmission assembly 3, thereby ensuring the sealing of the first cavity 61 and preventing grass clippings from entering the first cavity 61 and adversely affecting the transmission assembly 3.

[0065] In some embodiments, the cutting mechanism 7 includes a mounting base 71, a second driving member 72, and a cutting member 73. The mounting base 71 is disposed on the swing arm 2, the second driving member 72 is disposed on the mounting base 71, and the cutting member 73 is connected to the second driving member 72, which is used to drive the movement of the cutting member 73. The mounting base 71 can be placed on the swing arm 2. When the swing arm 2 rotates, the mounting base 71 and the cutting member 73 disposed on the mounting base 71 can be driven to rise or fall, thereby changing the height at which the cutting member 73 cuts the grass.

[0066] Specifically, please refer to Figure 7. The cutting member 73 may include a cutter disc 732, a blade 731 and a guard disc 74. The guard disc 74 can be arranged at the bottom of the mounting seat 71, and the driving end of the second driving member 72 is provided with a flange, which is connected to the cutter disc 732. The blade 731 is movably arranged on the cutter disc 732, and the cutter disc 732 is arranged at the bottom of the guard disc 74. During actual operation, the second driving member 72 drives the cutter disc 732 to rotate, and the blade 731 on the cutter disc 732 is thrown out under the action of centrifugal force to achieve mowing.

[0067] In some embodiments, a limiting mechanism is further included, connected to the mounting seat 71, and the limiting mechanism and the swing arm 2 are respectively located on opposite sides of the mounting seat 71. Specifically, the limiting mechanism is connected to the lawn mower body. When the mounting seat 71 is movably provided on the swing arm 2, when the lawn mower encounters a ground protrusion such as a stone or a lawn bump while traveling, the cutting mechanism 7 is displaced relative to the swing arm 2 under the interference of the ground protrusion. At this time, the limiting mechanism can limit the displacement trajectory of the cutting mechanism 7, thereby improving the flexibility of the cutting mechanism 7 to rise or fall relative to the swing arm 2 when passing over the ground protrusion, thereby further ensuring the reliability of the lawn mower in passing over ground obstacles.

[0068] In some embodiments, the limiting mechanism includes a connecting rod assembly 8 , which includes at least one connecting rod, one end of which is rotatably connected to the mounting seat 71 .

[0069] Based on the above embodiment, with specific reference to Figures 8 and 9, the connecting rod assembly 8 includes a first connecting rod 81, a second connecting rod 82 and a connecting seat 83, wherein the connecting seat 83 is connected to the lawn mower body, one end of the first connecting rod 81 and one end of the second connecting rod 82 are rotatably connected to the connecting seat 83, respectively, the other end of the first connecting rod 81 and the other end of the second connecting rod 82 are rotatably connected to the mounting seat 71, and the first connecting rod 81 and the second connecting rod 82 are arranged parallel to each other, and the first connecting rod 81 and the second connecting rod 82 can also be connected by a spring 84; in this case, the connecting rod assembly 8 forms a four-link structure, which enables the cutting assembly to rise or fall smoothly and reliably when the ground is raised.

[0070] In some embodiments, in order to facilitate the assembly of the limiting mechanism and the lawn mower body, the limiting mechanism further includes a connecting seat 83 , and the other end of the connecting rod is rotatably connected to the connecting seat 83 .

[0071] In other embodiments of the present application, the limiting mechanism can also specifically adopt other methods to replace the connecting rod assembly 8, for example: a connecting seat 83 is provided on the lawn mower body, a slide groove is provided on the connecting seat 83, a slider is provided on the mounting seat 71, and the slider is slidably provided in the slide groove, so that the slider and the slide groove cooperate to form a slide rail assembly, and when the cutting mechanism 7 passes through the ground protrusion, the mounting seat 71 can drive the cutting member 73 to slide along the slide groove; or, a limiting hole can be provided on the lawn mower body, and the mounting seat 71 can be movably provided in the limiting hole, so that the limiting hole can limit the mounting seat 71 when the mounting seat 71 passes through the ground protrusion.

[0072] The present application also provides a lawn mower comprising a lawn mower body and the aforementioned cutting device, the cutting device being mounted on the lawn mower body. The specific structure of the cutting device can be referenced to the aforementioned embodiments. Since the cutting device utilizes all of the technical solutions of the aforementioned embodiments, it at least possesses all of the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore, no further details will be given here.

[0073] In some embodiments, the lawn mower body includes a chassis, and the cutting device is detachably mounted on the chassis. To prevent grass clippings and waste from splashing during mowing, the chassis is provided with a groove opening toward the ground, and the cutting device is disposed within the groove, so that the chassis can shield the grass clippings and waste.

[0074] In some embodiments, referring to FIG. 10 , a controller is provided on the lawn mower body, and the first drive member 1 is electrically connected to the controller. The lawn mower also includes a detection mechanism electrically connected to the controller for detecting the position of the cutting mechanism 7. In actual use, when the detection mechanism detects that the cutting mechanism 7 is in the highest or lowest position, the controller controls the motor to stop operation to prevent the cutting mechanism 7 from rising or falling too far and causing damage to the lawn mower, thereby improving the reliability of the cutting device in adjusting the cutting height.

[0075] In some embodiments, please refer to Figure 11, when the height adjustment mechanism also includes a transmission component 3, the transmission component 3 includes a worm 31 and a gear 32, the first driving member 1 is connected to the worm 31, the worm 31 is engaged with the gear 32, and the gear 32 is connected to the swing arm 2, the detection mechanism includes a first sensing component 4, the first sensing component 4 includes a first magnet 41, a first sensing sensor 43 and a second sensing sensor 42, the first magnet 41 is provided on the gear 32, the first sensing sensor 43 and the second sensing sensor 42 are spaced apart and provided on the lawn mower body, the first sensing sensor 43 and the second sensing sensor 42 are both electrically connected to the controller, wherein, when the cutting mechanism 7 is in the highest position, the first magnet 41 triggers the first sensing sensor 43; when the cutting mechanism 7 is in the lowest position, the first magnet 41 triggers the second sensing sensor 42.

[0076] Specifically, when the first driving member 1 drives the worm 31 to rotate, the worm 31 will drive the gear 32 to rotate upward or downward, and accordingly, the first magnet 41 will also rotate upward or upward with the gear 32, and the gear 32 drives the swing arm 2 to rotate upward or downward, thereby causing the swing arm 2 to drive the cutting mechanism 7 to rise or fall; wherein, when the cutting mechanism 7 rises to the highest position, the first magnet 41 on the gear 32 can trigger the first sensing sensor 43, so that the first sensing sensor 43 sends an electrical signal to the controller, and the controller controls the first driving member 1 to stop rotating to prevent the cutting mechanism 7 from rising too far and causing the cutting mechanism 7 to damage the lawn mower body; similarly, when the lawn mower descends to the lowest position, the first magnet 41 on the gear 32 can trigger the second sensing sensor 42, so that the second sensing sensor 42 sends an electrical signal to the controller, and the controller controls the first driving component to stop rotating to prevent the cutting mechanism 7 from descending too far and causing the cutting mechanism 7 to conflict with the lawn and cause damage to the cutting mechanism 7.

[0077] Furthermore, based on the above embodiment, the detection mechanism further includes a second sensing component 5, which includes a second magnet 51 disposed on the cutting mechanism and a third sensor 52 disposed on the lawn mower body. The third sensor 52 is electrically connected to the controller. When the cutting mechanism 7 is in the lowest position and / or the highest position, the second magnet 51 triggers the third sensor 52. The controller can determine the position of the cutting mechanism 7 by combining the detection results of the first sensing component 4 and the second sensing component 5, thereby avoiding misjudgments by the detection mechanism based on the results of a single sensing component. This embodiment can effectively improve the reliability of the detection mechanism.

[0078] As one of the optional embodiments, the third induction sensor 52 is provided on the lawn mower body, and the second magnet 51 is provided on the cutting mechanism 7. When the height adjustment mechanism adjusts the height of the cutting mechanism 7, the second magnet 51 rises and falls with the cutting mechanism 7. Specifically, the position of the third induction sensor 52 can be set to correspond to the position of the second magnet 51 when the cutting mechanism 7 is in the highest position or the lowest position, so that when the cutting mechanism 7 is in the highest position or the lowest position, the second magnet 51 triggers the third induction sensor 52; of course, two third induction sensors 52 can also be arranged at intervals on the lawn mower body, and the two third induction sensors 52 correspond to the positions of the second magnet 51 when the cutting mechanism 7 is in the highest position and the lowest position, respectively.

[0079] As another optional embodiment, referring to FIG11 , a second magnet 51 is disposed on the worm 31, so that the worm 31 drives the second magnet 51 to rotate. When the cutting mechanism 7 is in the highest position, the second magnet 51 corresponds to and triggers the third inductive sensor 52, and / or when the cutting mechanism 7 is in the lowest position, the second magnet 51 corresponds to and triggers the third inductive sensor 52.

[0080] In some embodiments, the controller can be configured to calculate the number of rotations of the motor-driven worm 31 based on the number of times the second magnet 51 triggers the third induction sensor 52, and calculate the lifting height of the cutting mechanism 7 based on the pre-stored displacement of the cutting mechanism 7 when the worm 31 rotates one circle.

[0081] Specifically, the first inductive sensor 43 , the second inductive sensor 42 and the third inductive sensor 52 may be magnetic inductive sensors, such as Hall sensors, reed switches, and the like.

[0082] Of course, in some embodiments, the first sensing component 4 and the second sensing component 5 may also be other sensing sensors such as photoelectric sensors to replace magnets and magnetic induction sensors.

[0083] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent transformations made using the contents of the present application specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A cutting device, characterized in that, It includes a cutting mechanism and a height adjustment mechanism. The height adjustment mechanism includes a first driving member and a swing arm. The first driving member is connected to the swing arm to drive the swing arm to rotate. The cutting mechanism is arranged on the swing arm so that when the swing arm rotates, it drives the cutting mechanism to rise or fall.

2. The cutting device according to claim 1, characterized in that, The cutting mechanism is leaned on the swing arm.

3. The cutting device according to claim 1 or 2, characterized in that, The height adjustment mechanism further includes a transmission component. The power input end of the transmission component is connected to the first driving member, and the power output end of the transmission component is connected to the swing arm.

4. The cutting device according to claim 3, characterized in that, The transmission component includes a worm and a gear. The first driving member is connected to the worm to drive the worm to rotate. The worm meshes with the gear, and the gear is connected to the swing arm to drive the swing arm to rotate.

5. The cutting device according to claim 4, wherein, The transmission component further includes a rotating shaft. The rotating shaft is arranged on the gear, and the rotating shaft is connected to the swing arm.

6. The cutting device according to claim 5, characterized in that The rotation axis of the worm is perpendicular to the rotation axis of the swing arm.

7. The cutting device according to claim 3, wherein The height adjustment mechanism further includes a fixed seat. The fixed seat is provided with a first cavity and a second cavity that communicate with each other. An opening communicating the second cavity with the outside is formed on the fixed seat. The transmission component is arranged in the first cavity. The swing arm includes a rotating body and a support arm. The rotating body is arranged in the second cavity. The support arm includes a fixed end and a free end. The fixed end is fixed on the rotating body, and the free end extends through the opening to the outside of the second cavity, and the cutting mechanism is arranged on the free end.

8. The cutting device according to claim 7, characterized in that, It further includes a roller. The roller is arranged on the free end.

9. The cutting device according to claim 7, characterized in that, The first driving member includes a height adjustment motor. The height adjustment motor is arranged on the fixed seat and located outside the first cavity. An avoidance hole is formed on the fixed seat. The output shaft of the height adjustment motor penetrates through the avoidance hole, and the output shaft is connected to the power input end of the transmission component.

10. The cutting device according to claim 1 or 2, characterized in that, The cutting mechanism includes a mounting seat, a second driving member and a cutting member. The mounting seat is arranged on the swing arm. The second driving member is arranged on the mounting seat. The cutting member is connected to the second driving member, and the second driving member is used to drive the cutting member to move.

11. The cutting device according to claim 10, characterized in that, It further includes a limiting mechanism. The limiting mechanism is connected to the mounting seat, and the limiting mechanism and the swing arm are respectively located on opposite sides of the mounting seat.

12. The cutting device according to claim 11, wherein, The limiting mechanism includes a connecting rod assembly. The connecting rod assembly includes at least one connecting rod. One end of the connecting rod is rotatably connected to the mounting seat.

13. The cutting device according to claim 12, wherein The limiting mechanism further includes a connecting seat. The other end of the connecting rod is rotatably connected to the connecting seat.

14. A lawn mower, characterized in that, It includes a lawn mower body and a cutting device according to any one of claims 1-13. The cutting device is arranged on the lawn mower body.

15. The lawn mower according to claim 14, wherein, The lawn mower body includes a chassis. The cutting device is detachably mounted on the chassis.

16. The lawn mower according to claim 15, characterized in that, A groove with an opening facing the ground is formed on the chassis. The cutting device is arranged in the groove.

17. The lawn mower according to any one of claims 14 to 16, characterized in that, A controller is arranged on the lawn mower body. The first driving member is electrically connected to the controller. The lawn mower further includes a detection mechanism. The detection mechanism is electrically connected to the controller. The detection mechanism is used to detect the position of the cutting mechanism.

18. The lawn mower according to claim 17, wherein, When the height adjustment mechanism further includes a transmission assembly, the transmission assembly includes a worm and a gear, the first driving member is connected to the worm, the worm meshes with the gear, and the gear is connected to the swing arm, the detection mechanism includes a first induction assembly. The first induction assembly includes a first magnet, a first induction sensor, and a second induction sensor. The first magnet is disposed on the gear, the first induction sensor and the second induction sensor are spaced apart and disposed on the lawn mower body, and both the first induction sensor and the second induction sensor are electrically connected to the controller. Among them, when the cutting mechanism is at the highest position, the first magnet triggers the first induction sensor; when the cutting mechanism is at the lowest position, the first magnet triggers the second induction sensor.

19. The lawn mower according to claim 18, wherein, The detection mechanism further includes a second induction assembly. The second induction assembly includes a second magnet disposed on the cutting device and a third induction sensor disposed on the lawn mower body. The third induction sensor is electrically connected to the controller. When the cutting mechanism is at the lowest position and / or the highest position, the second magnet triggers the third induction sensor.

20. The lawn mower according to claim 19, characterized in that, The second magnet is disposed on the worm so that the worm drives the second magnet to rotate.

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