Cutting mechanism of self-propelled working device and self-propelled working device

Abstract

The application relates to the technical field of cutting devices, and particularly discloses a cutting mechanism of a self-walking operation device and the self-walking operation device, the cutting mechanism comprising a cutter disc assembly and a floating support assembly; the floating support assembly comprises a swing piece and a supporting wheel, the swing piece is rotationally connected with the cutter disc assembly, the swing piece has a first rotation axis, the supporting wheel is rotationally connected with the swing piece, the supporting wheel has a second rotation axis, the second rotation axis and the first rotation axis are both perpendicular to the moving direction of the self-walking operation device, and the second rotation axis and the first rotation axis are parallel. When the cutting mechanism works, the supporting wheel is always in contact with the ground, the supporting wheel can float relative to the cutter disc assembly through the swing piece, the adaptability of the cutting mechanism to the terrain is improved, the cutter disc assembly is always kept in a relatively constant height range, the mowing height of the cutter disc assembly is less affected by the terrain, and the cutting quality of the cutting mechanism is improved.

Description

Technical Field

[0001] This application relates to the field of cutting device technology, specifically to a cutting mechanism and a self-propelled operating device. Background Technology

[0002] Current lawnmower robots typically use a blade assembly to perform cutting operations. However, the cutting height of this assembly is difficult to control, especially when operating on complex, undulating terrain. The cutting height varies significantly; for example, in recessed areas, the blade assembly may cut too high or become obstructed, resulting in missed cuts, while in raised areas, the blade assembly may cut too low, leaving the lawn uncut. Therefore, current lawnmower robot blade assemblies have poor adaptability to terrain and produce relatively poor cutting quality. Utility Model Content

[0003] In view of the above, it is necessary to provide a cutting mechanism and a self-propelled operating device to improve adaptability to terrain and cutting quality.

[0004] In a first aspect, embodiments of this application provide a cutting mechanism for a self-propelled operating device, comprising: a cutter head assembly; and a floating support assembly, including a swing member and a support wheel, wherein the swing member is rotatably connected to the cutter head assembly, the swing member has a first rotation axis, the support wheel is rotatably connected to the swing member, and the support wheel has a second rotation axis, wherein both the second rotation axis and the first rotation axis are perpendicular to the moving direction of the self-propelled operating device, and the second rotation axis and the first rotation axis are parallel.

[0005] In some embodiments, the distance between the second rotation axis and the first rotation axis is less than the rotation radius of the support wheel.

[0006] In some embodiments, the lowest point of the cutter head assembly is higher than the lowest point of the support wheel.

[0007] In some embodiments, the distance between the lowest point of the cutter head assembly and the lowest point of the support wheel ranges from 25mm to 35mm.

[0008] In some embodiments, the floating support assembly further includes a first connector and a second connector. The first connector passes through the swing member and is connected to the cutter head assembly. The axis of the first connector is collinear with the first rotation axis. The second connector passes through the support wheel and is connected to the swing member. The axis of the second connector is collinear with the second rotation axis.

[0009] In some embodiments, the support wheel is an omnidirectional wheel.

[0010] In some embodiments, the floating support assembly comprises two sets, which are respectively disposed on opposite sides of the cutter head assembly.

[0011] In some embodiments, the cutter head assembly includes a protective cover, a rotation drive, and a cutting blade. The oscillating member is rotatably connected to the protective cover, the rotation drive is disposed within the protective cover, and the cutting blade is disposed inside the protective cover and connected to the rotation drive.

[0012] In some embodiments, the protective cover has a plurality of combing grooves, which are spaced apart along the extension direction of the first rotation axis and communicate with the interior of the protective cover.

[0013] Based on the first aspect, the cutting mechanism of this application embodiment provides a floating support assembly on the cutter head assembly. The floating support assembly includes a swing member rotatably connected to the cutter head assembly and a support wheel rotatably connected to the swing member. The second rotation axis of the support wheel is parallel to the first rotation axis of the swing member and both are perpendicular to the direction of movement of the self-propelled operating device. This structure allows the swing member to adjust its position as the cutter head assembly rises and falls, thereby causing the support wheel to float relative to the cutter head assembly. During the operation of the cutting mechanism, if the support wheel passes through a concave area of ​​the ground, it can move downwards under its own gravity; if the support wheel passes through a convex area of ​​the ground, it can move upwards under the support of the ground, ensuring that the support wheel is always in contact with the ground. Therefore, the cutter head assembly can maintain a relatively constant height range under complex undulating terrain, making the mowing height stable and unaffected by significant terrain undulations, effectively reducing the probability of missed cuts or bald patches, thereby significantly improving the uniformity and overall quality of the cut.

[0014] Secondly, this application also provides a self-propelled operating device, including the cutting mechanism described in the above embodiments.

[0015] Based on the second aspect, the self-propelled operating equipment of this application improves its adaptability to terrain and cutting quality by setting the above-mentioned cutting mechanism. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the cutting mechanism provided in the embodiments of this application.

[0017] Figure 2 yes Figure 1 The cutting mechanism shown is a cross-sectional view along the II-II direction.

[0018] Figure 3 yes Figure 1 The diagram shows the exploded structure of the cutting mechanism.

[0019] Explanation of main component symbols: Cutting mechanism 100, blade assembly 10, protective cover 11, combing groove 111, rotation drive 12, cutting blade 13, floating support assembly 20, swinging component 21, support wheel 22, first wheel body 221, main body 2211, support part 2212, rotating shaft part 2213, clearance groove 2214, second wheel body 222, first connecting member 23, second connecting member 24, first rotation axis L1, second rotation axis L2, moving direction F. Detailed Implementation

[0020] 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.

[0021] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between 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.

[0023] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0024] Please see Figure 1 This application provides a cutting mechanism 100 for a self-propelled operating device (not shown), which can be used to cut lawns, crops, etc. For ease of understanding and explanation, this application uses the cutting mechanism 100 for cutting lawns as an example for illustration; obviously, this is not a limitation of this application.

[0025] Please see Figure 1 and Figure 2 In this embodiment, the cutting mechanism 100 includes a cutter head assembly 10 and a floating support assembly 20. The cutter head assembly 10 is connected to the lifting mechanism (not shown) of the self-propelled operating equipment and can be raised and lowered under the drive of the lifting mechanism.

[0026] The floating support assembly 20 includes a swing member 21 and a support wheel 22. The swing member 21 is rotatably connected to the cutter head assembly 10 and has a first rotation axis L1. The support wheel 22 is rotatably connected to the swing member 21 and has a second rotation axis L2. Both the second rotation axis L2 and the first rotation axis L1 are perpendicular to the moving direction F of the self-propelled working device, and the second rotation axis L2 and the first rotation axis L1 are parallel.

[0027] Since the second rotation axis L2 of the support wheel 22 and the first rotation axis L1 of the swing member 21 are both perpendicular to the moving direction F of the self-propelled operating device, and the second rotation axis L2 and the first rotation axis L1 are parallel, the height of the swing member 21 is adjusted according to the lifting height of the cutter head assembly 10, and the height of the support wheel 22 is adjusted through the swing member 21. The support wheel 22 can float relative to the cutter head assembly 10 through the swing member 21. When the cutting mechanism 100 performs cutting operations, if the support wheel 22 passes through an area with potholes, the support wheel 22 moves downward under its own weight. If the support wheel 22 passes through an area with raised ground, the support wheel 22 moves upward under the support of the ground, so that the support wheel 22 is always in contact with the ground, which improves the adaptability of the cutting mechanism 100 to the terrain. Moreover, the cutter head assembly 10 can maintain a relatively constant height range under complex undulating terrain, so that the mowing height is stable and not significantly affected by terrain undulations, effectively reducing the probability of missed mowing or bald cutting, thereby significantly improving the uniformity and quality of cutting.

[0028] In some embodiments, the distance between the second rotation axis L2 and the first rotation axis L1 is less than the rotation radius of the support wheel 22.

[0029] In this embodiment, when the self-propelled device moves on an uneven lawn, the support wheel 22 serves as a floating reference and remains in contact with the ground. If it travels to a depression, the support wheel 22 can swing downwards deeper under the combined force of gravity and the swinging member 21 to conform to the bottom of the depression; if it travels to a protrusion, the upward force of the ground on the support wheel 22 will push the swinging member 21 to rotate upwards around the first rotation axis L1. By limiting the distance between the second rotation axis L2 and the first rotation axis L1 to be less than the rotation radius of the support wheel 22, the ground contact point of the support wheel 22 is always located in the outer region of the first rotation axis L1 when it rotates, thereby avoiding the situation where the support wheel 22 is unstable in grounding or suspended due to excessive axial distance.

[0030] In some embodiments, the lowest point of the cutter head assembly 10 is higher than the lowest point of the support wheel 22.

[0031] In this embodiment, by setting the lowest point of the cutter head assembly 10 higher than the lowest point of the support wheel 22, the support wheel 22 becomes a limiting component that directly contacts the ground during movement, thus protecting the cutter head assembly 10. On the one hand, this design prevents the cutter head assembly 10 from directly scraping the ground due to terrain undulations, improving the service life and operational safety of the cutter head assembly 10. On the other hand, the support wheel 22 preferentially contacts the ground and floats with the ground undulations, ensuring that the cutter head assembly 10 always maintains a reasonable suspension height under the guidance of the support wheel 22, thereby stabilizing the mowing height and reducing problems such as shaving too much ground due to the cutter head assembly 10 being too low or missing cuts due to obstruction of the cutter head assembly 10.

[0032] In some embodiments, the distance between the lowest point of the cutter head assembly 10 and the lowest point of the support wheel 22 ranges from 25mm to 35mm.

[0033] In this embodiment, when the support wheel 22 is in contact with the ground and the cutter head assembly 10 is moved to its lowest position, the distance between the lowest point of the cutter head assembly 10 and the lowest point of the support wheel 22 is h, and the value of h ranges from 25mm to 35mm. By setting the value of h to the range of 25mm to 35mm, the minimum mowing height of the cutter head assembly 10 is ensured to be within a suitable range, and the probability of the cutter head assembly 10 being damaged due to contact with the ground and the lawn is further reduced.

[0034] In one embodiment, the value of h can be 30 mm. When h is this value, the minimum mowing height of the blade assembly 10 is the preferred cutting height for the lawn, and the probability of the blade assembly 10 contacting the ground and damaging the blade assembly 10 and the lawn is further reduced.

[0035] In other embodiments, the value of h can also be 25mm, 26mm, 27mm, 28mm, 29mm, 31mm, 32mm, 33mm, 34mm or 35mm, and this application embodiment does not specifically limit it.

[0036] Please refer to the following: Figure 3 In some embodiments, the cutter head assembly 10 includes a protective cover 11, a rotation drive 12, and a cutting blade 13. The swing member 21 is rotatably connected to the protective cover 11. The rotation drive 12 is disposed in the protective cover 11, and the cutting blade 13 is disposed inside the protective cover 11 and connected to the rotation drive 12.

[0037] By installing the protective cover 11, the probability of the cutting blade 13 being damaged by colliding with hard objects such as stones is reduced, and the probability of the cutting blade 13 cutting small animals and users is also reduced. By installing the rotation drive 12 to drive the cutting blade 13 to rotate for cutting operations, the cutting efficiency of the cutter head assembly 10 is improved.

[0038] In some embodiments, the rotation drive 12 is an electric motor. In other embodiments, the rotation drive 12 may also be powered by fuel or pneumatic power, and this application does not specifically limit this.

[0039] In some embodiments, the cutting blade 13 is a metal blade, thereby improving the cutting efficiency of the cutter head assembly 10. In other embodiments, the cutting blade 13 may also be a plastic blade or straw rope, and this application embodiment does not specifically limit this.

[0040] In some embodiments, the protective cover 11 has a plurality of combing grooves 111, which are spaced apart along the extension direction of the first rotation axis L1 and communicate with the interior of the protective cover 11.

[0041] In this embodiment, by setting multiple combing grooves 111, it is easy to lift the grass to be cut and guide the grass to be cut into the protective cover 11 to contact the cutting blade 13, thereby improving the cutting efficiency and cutting quality of the blade assembly 10.

[0042] Please refer to it again. Figure 1 , Figure 2 and Figure 3 In some embodiments, the swing member 21 is strip-shaped and the length of the swing member 21 is fixed, thereby improving the convenience of connecting the swing member 21 with the support wheel 22 and the cutter head assembly 10, and reducing the gap between the support wheel 22 and the cutter head assembly 10.

[0043] In some embodiments, the two ends of the swing member 21 are rotatably connected to the support wheel 22 and the cutter head assembly 10, respectively, which helps to reduce the probability of the swing member 21 scraping against the ground and also helps to reduce the length of the swing member 21, thus saving costs.

[0044] In some other embodiments, the swing member 21 may also be a telescopic structure, thereby facilitating the adjustment of the minimum mowing height of the cutter head assembly 10. This application does not specifically limit this aspect.

[0045] In some embodiments, the support wheel 22 is an omnidirectional wheel.

[0046] In this embodiment, by setting the support wheel 22 as an omnidirectional wheel, the support wheel 22 can maintain its ground support function while having the ability to roll freely in multiple directions. This can effectively reduce the frictional resistance of the cutting mechanism 100 when turning, moving laterally, or adjusting its posture, and avoid jamming or uneven cutting caused by the limited rolling direction of the support wheel 22. This improves the adaptability of the cutting mechanism 100 to the terrain and improves the cutting efficiency and cutting quality of the cutting mechanism 100.

[0047] In some embodiments, the support wheel 22 includes a first wheel body 221 and a plurality of second wheel bodies 222. The first wheel body 221 includes a main body 2211, a plurality of support parts 2212 and a plurality of rotating shaft parts 2213. The main body 2211 is rotatably connected to the swing member 21. The plurality of support parts 2212 are evenly arranged around the circumference of the main body 2211. A clearance groove 2214 is formed between every two adjacent support parts 2212. The plurality of rotating shaft parts 2213 correspond one-to-one with the plurality of clearance grooves 2214. Each rotating shaft part 2213 is disposed in the corresponding clearance groove 2214, and both ends of each rotating shaft part 2213 are connected to two adjacent support parts 2212. The plurality of second wheel bodies 222 correspond one-to-one with the plurality of rotating shaft parts 2213. Each second wheel body 222 is rotatably sleeved on the corresponding rotating shaft part 2213.

[0048] When the self-propelled working equipment moves forward in a straight line, the first wheel 221 rotates, and the second wheel 222 contacts the ground and provides support. When the self-propelled working equipment turns or makes a U-turn, both the first wheel 221 and the second wheel 222 rotate. When the self-propelled working equipment moves laterally, the second wheel 222 rotates.

[0049] By setting the specific structure of the support wheel 22, the smoothness of the support wheel 22 when rotating in all directions is improved, thereby improving the adaptability of the cutting mechanism 100 to the terrain and improving the cutting efficiency and cutting quality of the cutting mechanism 100.

[0050] In some other embodiments, the support wheel 22 may also be a guide wheel or a swivel wheel, and this application embodiment does not specifically limit this.

[0051] In some embodiments, the floating support assembly 20 further includes a first connector 23 and a second connector 24. The first connector 23 passes through the swing member 21 and is connected to the protective cover 11 of the cutter head assembly 10. The axis of the first connector 23 is collinear with the first rotation axis L1. The second connector 24 passes through the main body 2211 of the support wheel 22 and is connected to the swing member 21. The axis of the second connector 24 is collinear with the second rotation axis L2.

[0052] In this embodiment, by providing the first connecting member 23 and the second connecting member 24, it is convenient for the swing member 21 to be rotatably connected to the cutter head assembly 10 through the first connecting member 23, and for the support wheel 22 to be rotatably connected to the swing member 21 through the second connecting member 24. In addition, by providing the first connecting member 23 and the second connecting member 24, the convenience of assembling and disassembling the swing member 21 and the support wheel 22 is improved, thereby facilitating the maintenance and replacement of the floating support assembly 20.

[0053] In some embodiments, both the first connector 23 and the second connector 24 can be bolts, thereby further improving the ease of assembling and disassembling the swing member 21 and the support wheel 22. In other embodiments, the first connector 23 and the second connector 24 can also be pins, rivets, etc., and this application does not specifically limit them.

[0054] In some embodiments, there are two sets of floating support components 20, which are respectively disposed on opposite sides of the cutter head assembly 10. By providing two sets of floating support components 20, the stability of the cutter head assembly 10 is improved, and it is beneficial for the cutter head assembly 10 to maintain the cutting height, thereby improving the cutting quality of the cutting mechanism 100.

[0055] In some embodiments, the swing members 21 of the two sets of floating support assemblies 20 are rotatably connected to the protective cover 11 of the cutter head assembly 10 through corresponding first connectors 23.

[0056] In some embodiments, the two sets of floating support assemblies 20 are symmetrically arranged around the cutter head assembly 10, and the arrangement direction of the two sets of floating support assemblies 20 is perpendicular to the moving direction F of the self-propelled operating device. This further improves the cutting quality of the cutting mechanism 100.

[0057] In some embodiments, the number of floating support components 20 can also be a group. When the floating support components 20 are a group, the floating support components 20 can be arranged on the front or rear side of the cutter head assembly 10. This application embodiment does not specifically limit this.

[0058] In summary, the cutting mechanism 100 of this application embodiment provides a floating support assembly 20 on the cutter head assembly 10. The floating support assembly 20 includes a swing member 21 rotatably connected to the cutter head assembly 10 and a support wheel 22 rotatably connected to the swing member 21. The second rotation axis L2 of the support wheel 22 is parallel to the first rotation axis L1 of the swing member 21 and is perpendicular to the moving direction F of the self-propelled operating device. This structure allows the swing member 21 to adjust its position as the cutter head assembly 10 rises and falls, thereby driving the support wheel 22 to float relative to the cutter head assembly 10. During the operation of the cutting mechanism 100, if the support wheel 22 passes through a depression in the ground, it can move downward under its own weight; if the support wheel 22 passes through a protruding area, it can move upward under the support of the ground, ensuring that the support wheel 22 is always in contact with the ground. As a result, the cutter head assembly 10 can maintain a relatively constant height range under complex undulating terrain, making the mowing height stable and not significantly affected by terrain undulations, effectively reducing the probability of missed cuts or bald patches, thereby significantly improving the uniformity of cutting and the overall cutting quality.

[0059] This embodiment also provides a self-propelled operating device (not shown in the figure), including the cutting mechanism 100 as described in the above embodiment. By incorporating the cutting mechanism 100, the self-propelled operating device of this application embodiment improves its adaptability to terrain and cutting quality.

[0060] In this embodiment, the self-propelled working device is a lawnmower robot. In other embodiments, the self-propelled working device may also be a harvester, etc., and this application does not specifically limit it in this regard.

[0061] In this embodiment, the self-propelled operating device also includes a device body (not shown), wheels (not shown), and a lifting mechanism (not shown). The wheels are installed at the bottom of the device body and are used to drive the device body to move. The lifting mechanism is located on the device body, and the cutter head assembly 10 of the cutting mechanism 100 is connected to the lifting mechanism.

[0062] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A cutting mechanism for a self-propelled operating device, characterized in that, include: Cutter head assembly; A floating support assembly includes a swing element and a support wheel. The swing element is rotatably connected to the cutter head assembly. The swing element has a first axis of rotation. The support wheel is rotatably connected to the swing element and has a second axis of rotation. Both the second axis of rotation and the first axis of rotation are perpendicular to the direction of movement of the self-propelled working device, and the second axis of rotation and the first axis of rotation are parallel.

2. The cutting mechanism of the self-propelled operating equipment according to claim 1, characterized in that, The distance between the second rotation axis and the first rotation axis is less than the rotation radius of the support wheel.

3. The cutting mechanism of the self-propelled operating equipment according to claim 1, characterized in that, The lowest point of the cutter head assembly is higher than the lowest point of the support wheel.

4. The cutting mechanism of the self-propelled operating equipment according to claim 3, characterized in that, The distance between the lowest point of the cutter head assembly and the lowest point of the support wheel ranges from 25mm to 35mm.

5. The cutting mechanism of the self-propelled operating equipment according to claim 1, characterized in that, The floating support assembly further includes a first connector and a second connector. The first connector passes through the swing member and is connected to the cutter head assembly. The axis of the first connector is collinear with the first rotation axis. The second connector passes through the support wheel and is connected to the swing member. The axis of the second connector is collinear with the second rotation axis.

6. The cutting mechanism of the self-propelled operating equipment according to claim 1, characterized in that, The support wheel is an omnidirectional wheel.

7. The cutting mechanism of the self-propelled operating equipment according to any one of claims 1-6, characterized in that, The floating support assembly consists of two sets, which are respectively located on opposite sides of the cutter head assembly.

8. The cutting mechanism of the self-propelled operating equipment according to any one of claims 1-6, characterized in that, The cutter head assembly includes a protective cover, a rotating drive, and a cutting blade. The oscillating member is rotatably connected to the protective cover. The rotating drive is located within the protective cover, and the cutting blade is located inside the protective cover and connected to the rotating drive.

9. The cutting mechanism of the self-propelled operating equipment according to claim 8, characterized in that, The protective cover has multiple combing grooves, which are spaced apart along the extension direction of the first rotation axis and communicate with the interior of the protective cover.

10. A self-propelled operating device, characterized in that, Includes the cutting mechanism as described in any one of claims 1-9.

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