Height adjustment device and mowing apparatus
Patent Information
- Application Number
- CN202522192726.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-16
AI Technical Summary
打草模块的离地高度直接影响割草效果，过高会导致割草不彻底，过低则可能损伤草皮或造成机械磨损，因此，需要通过高度调节装置对打草模块高度进行调节，然而，在传统的自动割草机器人中，其高度调节装置的调节精度过低，则仍然会出现割草不均匀或者打草头与地面接触的现象
在本申请的高度调节装置中，第一连接臂的两端分别用于与割草设备的设备主体以及割草设备的割草装置连接，第二连接臂的两端分别用于与割草设备的设备主体以及割草设备的割草装置连接，以通过第一连接臂与第二连接臂将割草装置与设备主体进行连接，当需要调节割草装置的高度时，只需调节第一连接臂以及第二连接臂的倾斜角度即可调节割草装置的高度。由于高度调节件与第一连接臂活动连接，抵接件与第二连接臂连接，高度调节件与抵接件相抵，因此，当高度调节件相对于第一连接臂运动时，能够使得高度调节件推动抵接件，以通过抵接件带动第二连接臂运动，由于第一连接臂与第二连接臂平行设置，因此，当第二连接臂运动时，便能够带动第一连接臂随第二连接臂一起运动，从而实现第一连接臂以及第二连接臂的倾斜角度的调节，以实现对割草装置的高度调节。在这个过程中，高度调节件对抵接件的推动能够使得第二连接臂具有较高的运动精度，从而提高割草装置的高度调节精度。
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Figure CN224734268U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawn mowing equipment technology, and more specifically, to a height adjustment device and lawn mowing equipment. Background Technology
[0002] With the widespread use of automated equipment, automatic lawnmowers have become an important tool for modern garden maintenance. These robots are typically equipped with a mowing module, a mechanical device that cuts grass using high-speed rotating blades. The height of the mowing module off the ground directly affects the mowing effect; too high and the grass will not be completely cut, while too low and it may damage the turf or cause mechanical wear. Therefore, the height of the mowing module needs to be adjusted using a height adjustment device. However, in traditional automatic lawnmowers, the adjustment precision of the height adjustment device is too low, which can still result in uneven mowing or the mowing head touching the ground. Utility Model Content
[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a height adjustment device that can improve the height adjustment accuracy of the lawn mower.
[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this utility model provides a height adjustment device, comprising: First connecting arm; The second connecting arm is arranged parallel to the first connecting arm and is located on the side of the first connecting arm that is close to the ground along the height direction; A height adjustment assembly includes a height adjustment member and an abutment member. The height adjustment member is movably connected to a first connecting arm, and the abutment member is connected to a second connecting arm. The height adjustment member abuts against the abutment member, and the height adjustment member is movable relative to the first connecting arm so that the height adjustment member pushes the abutment member to move toward or away from the first connecting arm.
[0005] In an optional embodiment, the height adjusting member rotates relative to the first connecting arm, and the edge of the height adjusting member has a plurality of first abutting surfaces, the plurality of first abutting surfaces being arranged sequentially around the rotation center of the height adjusting member, and the distance between any two adjacent first abutting surfaces and the rotation center increasing or decreasing around the rotation center. The first abutting surface abuts against the abutting member.
[0006] In an optional embodiment, the abutting member has a second abutting surface, which is disposed toward the height adjusting member. The first abutting surface abuts against the second abutting surface. When the first abutting surface abuts against the second abutting surface, the second abutting surface is disposed parallel to the first abutting surface.
[0007] In an optional embodiment, the height adjustment member has a main body that rotates relative to the first connecting arm, and a plurality of first abutment surfaces are disposed on the edge of the main body. The areas of any two adjacent first abutment surfaces are the same or different, such that the plurality of first abutment surfaces are arranged around the rotation center of the main body.
[0008] In an optional embodiment, the height adjustment member further includes a locking portion, which is disposed near the first abutment surface with the largest distance from the rotation center and protrudes radially from the first abutment surface of the main body. The abutment member is provided with a locking groove, and when the first abutment surface with the largest distance from the rotation center abuts against the abutment member, the locking portion is locked into the locking groove.
[0009] In an optional embodiment, the height adjustment assembly further includes a rotating shaft, which is rotatably connected to the first connecting arm and fixedly connected to the height adjustment member.
[0010] In an optional embodiment, the height adjustment member moves relative to the first connecting arm in a direction toward or away from the second connecting arm.
[0011] In an optional embodiment, the height adjustment member is threadedly connected to the first connecting arm.
[0012] In an optional embodiment, the height adjustment member has an adjustment part, a first limiting part, and a second limiting part. The adjustment part is threadedly connected to the first connecting arm. The first limiting part is connected to the end of the adjustment part near the second connecting arm. The second limiting part is connected to the end of the adjustment part away from the second connecting arm. Both the first limiting part and the second limiting part can abut against the first connecting arm.
[0013] Secondly, this utility model provides a lawn mowing device, comprising: Equipment body; Lawn mowing devices; and As described in any of the foregoing embodiments, the height adjustment device has its first connecting arm connected to the device body and the mowing device at both ends, and the second connecting arm connected to the device body and the mowing device at both ends.
[0014] The height adjustment device of this application has the following advantages: In the height adjustment device of this application, the two ends of the first connecting arm are respectively used to connect to the main body of the mowing equipment and the mowing device of the mowing equipment, and the two ends of the second connecting arm are respectively used to connect to the main body of the mowing equipment and the mowing device of the mowing equipment, so that the mowing device is connected to the main body of the equipment through the first connecting arm and the second connecting arm. When it is necessary to adjust the height of the mowing device, it is only necessary to adjust the tilt angle of the first connecting arm and the second connecting arm to adjust the height of the mowing device. Since the height adjusting member is movably connected to the first connecting arm and the abutting member is connected to the second connecting arm, and the height adjusting member abuts against the abutting member, when the height adjusting member moves relative to the first connecting arm, it can push the abutting member, so that the abutting member drives the second connecting arm to move. Since the first connecting arm and the second connecting arm are arranged in parallel, when the second connecting arm moves, it can drive the first connecting arm to move together with the second connecting arm, thereby realizing the adjustment of the tilt angle of the first connecting arm and the second connecting arm, so as to realize the height adjustment of the mowing device. During this process, the pushing of the height adjustment component against the abutment component enables the second connecting arm to have high motion accuracy, thereby improving the height adjustment accuracy of the mowing device. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A three-dimensional structural schematic diagram of the lawn mowing device of Embodiment 1 in this application is shown; Figure 2 A cross-sectional view of the height adjustment device of Embodiment 1 in this application is shown; Figure 3 A three-dimensional structural schematic diagram of the height adjustment component of Embodiment 1 of this application is shown; Figure 4 A cross-sectional view of the height adjustment component of Embodiment 1 in this application is shown; Figure 5 A three-dimensional structural schematic diagram of the lawn mowing device of Embodiment 2 in this application is shown; Figure 6 A cross-sectional view of the height adjustment device of Embodiment 2 of this application is shown.
[0017] Explanation of key component symbols: 10 - Height adjustment device; 100 - First connecting arm; 200 - Second connecting arm; 300-Height adjustment assembly; 310-Height adjustment component; 311-First abutting surface; 3111-First abutting surface a; 3112-First abutting surface b; 3113-First abutting surface c; 3114-First abutting surface d; 3115-First abutting surface e; 3116-First abutting surface f; 3117-First abutting surface g; 3118-First abutting surface h; 3119-First abutting surface i; 312-Main body; 313-Snap-fitting part; 314-Adjustment part; 315-First limiting part; 316-Second limiting part; 320-Abutting component; 321-Second abutting surface; 322-Snap-fitting groove; 330-Rotating shaft; 340-First connecting component; 350-Limiting cover; 360-Second connecting component; 370-Spring bead; 20 - Main body of the equipment; 30 - Grass mowing device. Detailed Implementation
[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0023] Reference Figure 1 as well as Figure 5 As shown, the height adjustment device 10 involved in the embodiments of this application includes: a first connecting arm 100, a second connecting arm 200, and a height adjustment component 300.
[0024] Specifically, the second connecting arm 200 is arranged parallel to the first connecting arm 100 and is located on the side of the first connecting arm 100 that is close to the ground along the height direction; the height adjustment assembly 300 includes a height adjustment member 310 and an abutment member 320. The height adjustment member 310 is movably connected to the first connecting arm 100, and the abutment member 320 is connected to the second connecting arm 200. The height adjustment member 310 abuts against the abutment member 320, and the height adjustment member 310 can move relative to the first connecting arm 100 so that the height adjustment member 310 pushes the abutment member 320 to move toward or away from the first connecting arm 100.
[0025] In the height adjustment device 10 of this application, the two ends of the first connecting arm 100 are respectively used to connect to the main body 20 of the mowing equipment and the mowing device 30 of the mowing equipment, and the two ends of the second connecting arm 200 are respectively used to connect to the main body 20 of the mowing equipment and the mowing device 30 of the mowing equipment, so that the mowing device 30 is connected to the main body 20 through the first connecting arm 100 and the second connecting arm 200. When it is necessary to adjust the height of the mowing device 30, the height of the mowing device 30 can be adjusted simply by adjusting the tilt angle of the first connecting arm 100 and the second connecting arm 200. Since the height adjustment member 310 is movably connected to the first connecting arm 100, and the abutment member 320 is connected to the second connecting arm 200, with the height adjustment member 310 abutting against the abutment member 320, when the height adjustment member 310 moves relative to the first connecting arm 100, it pushes the abutment member 320, thereby driving the second connecting arm 200 to move. Because the first connecting arm 100 and the second connecting arm 200 are arranged parallel to each other, when the second connecting arm 200 moves, it drives the first connecting arm 100 to move together with it, thus adjusting the tilt angle of the first connecting arm 100 and the second connecting arm 200 to achieve height adjustment of the mowing device 30. In this process, the pushing of the abutment member 320 by the height adjustment member 310 enables the second connecting arm 200 to have high movement accuracy, thereby improving the height adjustment accuracy of the mowing device 30.
[0026] Example 1 Reference Figure 2 as well as Figure 3 As shown, the height adjustment member 310 rotates relative to the first connecting arm 100. The edge of the height adjustment member 310 has a plurality of first abutting surfaces 311. The plurality of first abutting surfaces 311 are arranged sequentially around the rotation center of the height adjustment member 310, and the distance between them and the rotation center increases or decreases around the rotation center. The first abutting surfaces 311 abut against the abutting member 320.
[0027] In this embodiment, since multiple first abutment surfaces 311 are arranged sequentially around the rotation center of the height adjustment member 310, and the first abutment surfaces 311 abut against the abutment member 320, when the height adjustment member 310 rotates relative to the first connecting arm 100, different first abutment surfaces 311 will abut against the abutment member 320 in sequence. Since the distance between multiple first abutment surfaces 311 and the rotation center increases or decreases around the rotation center, the abutment member 320 drives the second connecting arm 200 to gradually move away from or closer to the first connecting arm 100, thereby adjusting the tilt angle of the second connecting arm 200 to achieve height adjustment of the mowing device 30.
[0028] Reference Figure 4As shown, the abutting member 320 has a second abutting surface 321, which is disposed toward the height adjusting member 310, and the first abutting surface 311 abuts against the second abutting surface 321. When the first abutting surface 311 abuts against the second abutting surface 321, the second abutting surface 321 is disposed parallel to the first abutting surface 311.
[0029] In this embodiment, since the second abutment surface 321 is arranged facing the height adjustment member 310, when the height adjustment member 310 rotates, different first abutment surfaces 311 and second abutment surfaces 321 can abut against each other, thereby realizing the pushing of the abutment member 320 by the height adjustment member 310. When the first abutment surface 311 abuts against the second abutment surface 321, since the second abutment surface 321 is arranged parallel to the first abutment surface 311, the contact stability between the height adjustment member 310 and the abutment member 320 can be improved, so that the first connecting arm 100 and the second connecting arm 200 can remain stable at a certain tilt angle, thereby improving the adjustment stability and adjustment accuracy of the height adjustment device 10.
[0030] Continue to refer to Figure 4 As shown, the height adjustment member 310 has a main body 312, which rotates relative to the first connecting arm 100. A plurality of first abutment surfaces 311 are provided on the edge of the main body 312. The areas of any two adjacent first abutment surfaces 311 are the same or different, so that the plurality of first abutment surfaces 311 are arranged around the rotation center of the main body 312.
[0031] In this embodiment, since the areas of any two adjacent first abutment surfaces 311 are the same or different, the number of first abutment surfaces 311 and the area of each first abutment surface 311 can be adjusted so that multiple first abutment surfaces 311 surround the rotation center of the main body 312, and the distance between multiple first abutment surfaces 311 and the rotation center increases or decreases around the rotation center, thereby pushing the abutment member 320.
[0032] Continue to refer to Figure 4 As shown, the height adjustment member 310 also has a locking part 313. The locking part 313 is disposed near the first abutting surface 311, which is the furthest from the rotation center, and protrudes radially from the first abutting surface 311 along the main body 312. The abutting member 320 is provided with a locking groove 322. When the first abutting surface 311, which is the furthest from the rotation center, abuts against the second abutting surface 321, the locking part 313 is locked into the locking groove 322.
[0033] Specifically, the snap-fit groove 322 is provided on the second abutment surface 321 so that when the first abutment surface 311, which has the largest distance from the rotation center, abuts against the second abutment surface 321, the snap-fit part 313 can snap into the snap-fit groove 322.
[0034] In this embodiment, when the first abutting surface 311, which has the largest distance from the rotation center, abuts against the second abutting surface 321, the abutting relationship between the first abutting surface 311 and the second abutting surface 321 is not stable enough. At this time, since the locking part 313 is locked in the locking groove 322, the stability of the abutting relationship between the first abutting surface 311 and the second abutting surface 321 can be improved by the locking part 313, so that the first connecting arm 100 and the second connecting arm 200 can remain stable at the tilt angle.
[0035] Specifically, in this embodiment, we continue to refer to... Figure 4 As shown, the height adjustment member 310 has nine first abutment surfaces 311, namely first abutment surface a3111, first abutment surface b3112, first abutment surface c3113, first abutment surface d3114, first abutment surface e3115, first abutment surface f3116, first abutment surface g3117, first abutment surface h3118, and first abutment surface i3119; Continue to refer to Figure 4 As shown, the first abutting surfaces a3111, b3112, c3113, d3114, e3115, f3116, g3117, h3118, and i3119 are arranged in a counterclockwise direction around the rotation center of the main body 312, and the distance between the first abutting surfaces a3111, b3112, c3113, d3114, e3115, f3116, g3117, h3118, and i3119 and the rotation center increases around the rotation center. When the height adjustment member 310 rotates counterclockwise, the first abutment surfaces a3111, b3112, c3113, d3114, e3115, f3116, g3117, h3118, and i3119 will successively abut against the second abutment surface 321. In this way, the height adjustment member 310 gradually presses down on the abutment member 320, so that the second connecting arm 200 gradually tilts towards the ground, thereby reducing the distance between the lawn mower 30 and the ground. When the height adjustment component 310 rotates clockwise, the first abutment surfaces i3119, h3118, g3117, f3116, e3115, d3114, c3113, b3112, and a3111 will successively abut against the second abutment surface 321, causing the abutment component 320 to gradually rise. This further causes the second connecting arm 200 to gradually tilt away from the ground, thereby increasing the distance between the mowing device 30 and the ground. Among them, the first abutting surface 311 with the largest distance from the rotation center is the first abutting surface i3119. The locking part 313 is provided on the first abutting surface a3111 and protrudes from the first abutting surface a3111 along the radial direction of the main body 312. When the height adjustment member 310 rotates so that the first abutting surface i3119 abuts against the second abutting surface 321, the locking part 313 can be locked in the locking groove 322.
[0036] In summary, the height adjustment device 10 of this embodiment can perform nine levels of height adjustment on the mowing device 30, thereby improving the height adjustment accuracy of the mowing device 30. Of course, in addition to this, the number of first contact surfaces 311 is not limited to nine, but can be other numbers, and the specific number is set according to the height adjustment accuracy requirements of the mowing device 30.
[0037] Reference Figure 3 As shown, the height adjustment assembly 300 also includes a rotating shaft 330, which is rotatably connected to the first connecting arm 100 and fixedly connected to the height adjustment member 310.
[0038] In this embodiment, since the rotating shaft 330 is rotatably connected to the first connecting arm 100 and fixedly connected to the height adjusting member 310, the height adjusting member 310 can be rotated relative to the first connecting arm 100 by rotating the rotating shaft 330. The rotating shaft 330 can provide wrench space for the rotation of the height adjusting member 310, thereby improving the user's operational convenience.
[0039] Example 2 Reference Figure 5 as well as Figure 6 As shown, the height adjustment member 310 moves relative to the first connecting arm 100 toward the direction of approaching or moving away from the second connecting arm 200.
[0040] In this embodiment, since the height adjustment member 310 moves relative to the first connecting arm 100 toward the direction of approaching or moving away from the second connecting arm 200, the abutment member 320 moves toward the direction of approaching or moving away from the first connecting arm 100. This causes the abutment member 320 to drive the second connecting arm 200 to move toward the direction of approaching or moving away from the first connecting arm 100, thereby achieving height adjustment of the mowing device 30.
[0041] Reference Figure 6 As shown, the height adjustment component 310 is threadedly connected to the first connecting arm 100.
[0042] In this embodiment, since the height adjustment member 310 is threadedly connected to the first connecting arm 100, the height adjustment member 310 can be moved relative to the first connecting arm 100 towards or away from the second connecting arm 200 by turning the height adjustment member 310. At the same time, the threaded connection allows the height adjustment member 310 to move steplessly relative to the first connecting arm 100, thereby realizing stepless height adjustment of the mowing device 30 and further improving the height adjustment accuracy of the mowing device 30.
[0043] Continue to refer to Figure 6 As shown, the height adjustment member 310 has an adjustment part 314, a first limiting part 315 and a second limiting part 316. The adjustment part 314 is threadedly connected to the first connecting arm 100. The first limiting part 315 is connected to the end of the adjustment part 314 near the second connecting arm 200. The second limiting part 316 is connected to the end of the adjustment part 314 away from the second connecting arm 200. Both the first limiting part 315 and the second limiting part 316 can abut against the first connecting arm 100.
[0044] In this embodiment, since the first limiting part 315 is connected to the end of the adjusting part 314 near the second connecting arm 200, and the second limiting part 316 is connected to the end of the adjusting part 314 away from the second connecting arm 200, when the adjusting part 314 moves away from the second connecting arm 200 relative to the first connecting arm 100, the first limiting part 315 and the second limiting part 316 can abut against the first connecting arm 100, thereby limiting the movement of the adjusting part 314 by the first limiting part 315 and the second limiting part 316, and preventing the adjusting part 314 from detaching from the first connecting arm 100.
[0045] Specifically, continue to refer to Figure 6As shown, in this embodiment, the height adjustment assembly 300 further includes a first connector 340 and a limiting cover 350. Both the first connector 340 and the limiting cover 350 are connected to the first connecting arm 100, and the limiting cover 350 covers the first connector 340. The height adjustment component 310 passes through both the first connector 340 and the limiting cover 350, and the adjustment part 314 is threadedly connected to the first connector 340. When the adjustment part 314 moves away from the second connecting arm 200 relative to the first connecting arm 100, the first limiting part 315 abuts against the end of the first connector 340 away from the limiting cover 350, and the second limiting part 316 abuts against the end of the limiting cover 350 near the first connector 340. Thus, the movement of the adjustment part 314 is limited by the first limiting part 315 and the second limiting part 316, preventing the adjustment part 314 from detaching from the first connecting arm 100.
[0046] Specifically, continue to refer to Figure 6 As shown, in this embodiment, the height adjustment component 300 further includes a second connector 360 and a spring bead 370. The second connector 360 is disposed between the first connector 340 and the limiting cover 350, and is connected to the first connector 340 and the limiting cover 350 respectively. The spring bead 370 is disposed on the second connector 360 so that the user can feel a clear "gear position" when manually adjusting, knowing that the switch has been successfully completed, thus improving the user experience.
[0047] Reference Figure 1 as well as Figure 5 As shown, the lawn mowing equipment involved in the embodiments of this application includes: a main body 20, a lawn mowing device 30, and a height adjustment device 10 as described in any of the foregoing embodiments.
[0048] Specifically, the two ends of the first connecting arm 100 of the height adjustment device 10 are connected to the main body 20 and the mowing device 30, respectively, and the two ends of the second connecting arm 200 of the height adjustment device 10 are connected to the main body 20 and the mowing device 30, respectively.
[0049] In the lawn mowing device of this application, since the height adjustment device 10 described above can improve the height adjustment accuracy of the lawn mowing device 30, the lawn mowing device of this application can have a better user experience.
[0050] Specifically, in this embodiment, the mowing equipment can be a mowing robot, a weeding robot, an automatic mowing robot, or other similar equipment.
[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0052] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A height adjustment device, characterized in that, include: First connecting arm; The second connecting arm is arranged parallel to the first connecting arm and is located on the side of the first connecting arm that is close to the ground along the height direction; A height adjustment assembly includes a height adjustment member and an abutment member. The height adjustment member is movably connected to a first connecting arm, and the abutment member is connected to a second connecting arm. The height adjustment member abuts against the abutment member, and the height adjustment member is movable relative to the first connecting arm so that the height adjustment member pushes the abutment member to move toward or away from the first connecting arm.
2. The height adjustment device according to claim 1, characterized in that, The height adjustment member rotates relative to the first connecting arm. The edge of the height adjustment member has a plurality of first abutting surfaces. The plurality of first abutting surfaces are arranged sequentially around the rotation center of the height adjustment member, and the distance between them and the rotation center increases or decreases around the rotation center. The first abutting surface abuts against the abutting member.
3. The height adjustment device of claim 2, wherein, The abutting member has a second abutting surface, which is disposed toward the height adjusting member. The first abutting surface abuts against the second abutting surface. When the first abutting surface abuts against the second abutting surface, the second abutting surface is disposed parallel to the first abutting surface.
4. The height adjustment device according to claim 2, characterized in that, The height adjustment member has a main body that rotates relative to the first connecting arm. A plurality of first abutment surfaces are disposed on the edge of the main body. The areas of any two adjacent first abutment surfaces are the same or different, such that the plurality of first abutment surfaces are arranged around the rotation center of the main body.
5. The height adjustment device according to claim 4, characterized in that, The height adjustment component also has a locking part, which is located close to the first abutment surface with the largest distance from the rotation center and protrudes radially from the first abutment surface of the main body. The abutment component has a locking groove. When the first abutment surface with the largest distance from the rotation center abuts against the abutment component, the locking part is locked into the locking groove.
6. The height adjustment device according to claim 2, characterized in that, The height adjustment assembly further includes a rotating shaft, which is rotatably connected to the first connecting arm and fixedly connected to the height adjustment member.
7. The height adjustment device according to claim 1, characterized in that, The height adjustment member moves relative to the first connecting arm in a direction toward or away from the second connecting arm.
8. The height adjustment device of claim 7, wherein, The height adjustment component is threadedly connected to the first connecting arm.
9. The height adjustment device of claim 8, wherein, The height adjustment component has an adjustment part, a first limiting part, and a second limiting part. The adjustment part is threadedly connected to the first connecting arm. The first limiting part is connected to the end of the adjustment part near the second connecting arm. The second limiting part is connected to the end of the adjustment part away from the second connecting arm. Both the first limiting part and the second limiting part can abut against the first connecting arm.
10. A grass cutting apparatus characterised in that, include: Equipment body; Lawn mowing device; as well as The height adjustment device as described in any one of claims 1-9, wherein the two ends of the first connecting arm of the height adjustment device are respectively connected to the main body of the equipment and the mowing device, and the two ends of the second connecting arm of the height adjustment device are respectively connected to the main body of the equipment and the mowing device.