Cutting mechanism and self-moving work equipment

Abstract

A cutting mechanism and a self-moving working device, the cutting mechanism comprising a driving member, a mounting bracket and a cutting blade, a mounting hole is configured in the middle of the mounting bracket, a power output shaft of the driving member is arranged in the mounting hole and extends to a side of the mounting bracket away from the driving member, the cutting blade is connected with the power output shaft of the driving member to drive the cutting blade to rotate by the driving member, so that the cutting blade cuts the grass vegetation to be cut; wherein a guide groove is configured on the side of the mounting bracket, and the guide groove is used for guiding the grass clippings cut by the cutting blade to wind into the guide groove.

Description

Technical Field

[0001] This application relates to the field of robotics, and more particularly to a cutting mechanism and a self-moving operating device. Background Technology

[0002] In existing self-propelled operating equipment, the connection between the cutting blade and the output shaft is easily entangled by tangled material during operation. When there is too much entangled material, it will generate axial thrust on the output shaft, resulting in increased load on the drive components and even causing the drive components to stall. Utility Model Content

[0003] This application provides a cutting mechanism and a self-moving operating device, which aims to solve at least one of the technical problems existing in the prior art.

[0004] According to a first aspect of this application, this application provides a cutting mechanism, including a drive member, a mounting bracket, and a cutting blade. The mounting bracket has a mounting hole in its center. The power output shaft of the drive member passes through the mounting hole and extends to the side of the mounting bracket away from the drive member. The cutting blade is connected to the power output shaft of the drive member so that the drive member drives the cutting blade to rotate, thereby cutting the grass vegetation to be cut.

[0005] The mounting bracket has a guide groove on its periphery, which is used to guide the grass clippings cut by the cutting blade to wrap around the guide groove.

[0006] In a cutting mechanism according to one embodiment of this application, the mounting bracket includes:

[0007] The main body portion, wherein the mounting hole is formed in the main body portion and extends along the height direction of the main body portion;

[0008] A stop portion is provided on the periphery of the main body portion, located at one end of the main body portion near the drive member;

[0009] A connecting portion is provided on the periphery of the main body and located at the end of the main body away from the driving member, and the cutting blade is provided on the connecting portion;

[0010] The stop portion, the connecting portion, and the main body portion together form the guide groove.

[0011] In a cutting mechanism according to one embodiment of this application, the sidewall of the stop portion is inclined inward toward the connecting portion.

[0012] In a cutting mechanism according to one embodiment of this application, the cutting mechanism further includes a protective cover, the driving member is disposed on the protective cover, and the cutting blade and the mounting bracket are both located within the protective space formed by the protective cover.

[0013] In a cutting mechanism according to one embodiment of this application, the top wall of the protective cover is provided with an annular protrusion, the annular protrusion extends toward the cutting blade, the annular protrusion surrounds the outside of the stop portion, and the lowest end of the annular protrusion is lower than the end of the stop portion near the driving member.

[0014] In a cutting mechanism according to one embodiment of this application, the sidewall of the annular protrusion is inclined inward toward the connecting portion.

[0015] In a cutting mechanism according to one embodiment of this application, the maximum outer diameter of the stop portion is not less than the diameter of the outer tangent circle of the connecting portion.

[0016] In a cutting mechanism according to one embodiment of this application, a positioning post is provided on the connecting part, a positioning hole is provided on the cutting blade, and the positioning post passes through the positioning hole.

[0017] In a cutting mechanism according to one embodiment of this application, the cutting mechanism further includes a fastener, the inner wall of which is provided with a first threaded section, and the power output shaft of the driving member is provided with a second threaded section, wherein the first threaded section and the second threaded section are threadedly engaged.

[0018] According to a second aspect of this application, this application also provides a self-moving operating device, characterized in that it includes a device body and the aforementioned cutting mechanism, wherein the cutting mechanism is disposed on the device body.

[0019] The technical solution provided in this application embodiment can include the following beneficial effects: This application designs a cutting mechanism and a self-moving operating device. The cutting mechanism includes a drive component, a mounting bracket, and a cutting blade. The power output shaft of the drive component passes through the mounting bracket and extends to the side of the mounting bracket away from the drive component. The cutting blade is connected to the power output shaft of the drive component so that the drive component drives the cutting blade to rotate, enabling the cutting blade to cut the grass vegetation to be cut. The mounting bracket has a guide groove on its periphery. The guide groove is used to guide the grass clippings cut by the cutting blade to wrap around the guide groove, forming a physical isolation barrier around the power output shaft. This effectively prevents the grass clippings from continuing to wrap around the power output shaft, avoiding the risk of motor stalling and burnout due to the power output shaft being entangled in grass clippings, thereby improving the service life and reliability of the equipment. Furthermore, when cleaning the entangled grass clippings, only the grass clippings in the guide groove need to be cleaned; there is no need to clean the power output shaft, making the operation simpler and safer.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a cutting mechanism provided in one embodiment of this application;

[0023] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the cutting mechanism in the diagram;

[0024] Figure 3 yes Figure 1 An exploded view of the cutting mechanism in the diagram;

[0025] Figure 4 yes Figure 3 A partial cross-sectional view of the cutting mechanism in the middle;

[0026] Figure 5 yes Figure 3 A schematic diagram of the structure of the protective shield in the middle;

[0027] Figure 6 yes Figure 3 A schematic diagram of the mounting bracket in the diagram;

[0028] Figure 7 yes Figure 6 A schematic diagram of the mounting bracket from another angle;

[0029] Figure 8 yes Figure 6 A cross-sectional view of the mounting bracket.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Cutting mechanism;

[0032] 10. Drive component; 11. Drive body; 12. Power output shaft; 121. Second threaded section;

[0033] 20. Mounting bracket; 21. Guide groove; 22. Stop; 23. Inclined surface; 24. Main body; 25. Positioning post; 26. Connecting part; 27. Limiting part; 28. Mounting hole;

[0034] 30. Cutting blade; 31. Positioning hole;

[0035] 40. Protective cover; 41. Protective space; 42. Comb groove; 43. Annular protrusion;

[0036] 50. Fastener; 51. First threaded section. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should also be understood that the terminology used in this application specification is merely for describing specific realities within the scope of this application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used solely for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on 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, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] like Figures 1 to 2 As shown, according to a first aspect of this application, this application provides a cutting mechanism 100, including a drive member 10, a mounting bracket 20, and a cutting blade 30. The drive member 10 includes a drive body 11 and a power output shaft 12. The power output shaft 12 extends outward from one end of the drive body 11. The cutting blade 30 is connected to the power output shaft 12 through the mounting bracket 20 to receive rotational power from the motor body, so that the drive member 10 can drive the cutting blade 30 to rotate, so that the cutting blade 30 can cut the grass vegetation to be cut, thereby saving manpower and improving cutting efficiency.

[0041] In one alternative implementation, such as Figures 3 to 6 As shown, the mounting bracket 20 has a mounting hole 26 in the middle. The power output shaft 12 passes through the mounting hole 26 and extends to the side of the mounting bracket 20 away from the drive body 11. The cutting blade 30 is connected to the mounting bracket 20 and the power output shaft 12 to form a stable support and an efficient torque transmission path. It can also reduce unnecessary parts, reduce the risk of vibration and sway under high-speed rotation, and improve the stability and safety of operation. At the same time, it can also make the assembly and disassembly of the drive component 10, the mounting bracket 20 and the cutting blade 30 very simple.

[0042] In an optional embodiment, the mounting hole 26 has a D-shaped cross-section, and the output shaft is provided with a connecting section whose shape is adapted to the mounting hole 26 and a second threaded section 121 connected to the end of the connecting section away from the drive body 11. The mounting bracket 20 is connected to the connecting section through the mounting hole 26, and the cutting blade 30 is fixed to the mounting bracket 20 by a fastener 50 connected to the second threaded section 121, so as to receive and utilize the rotational power transmitted by the power output shaft 12 to cut the grass vegetation to be cut.

[0043] It should be noted that the portion of the power output shaft 12 passing through the mounting hole 26 may also be provided with a flat key, and the mounting hole 26 is provided with a corresponding keyway, so that the mounting bracket 20 can realize power transmission through the cooperation of the flat key and the keyway. Alternatively, a flange may be provided at the end of the power output shaft 12, and the mounting bracket 20 may be fastened to the flange with bolts, and the cutting blade 30 may be clamped between the mounting bracket 20 and the flange. This application does not impose any limitations.

[0044] In an optional embodiment, the mounting bracket 20 has a guide groove 21 on its periphery. The guide groove 21 is used to guide the grass clippings cut by the cutting blade 30 to wrap around the guide groove 21, so that the cut grass clippings are wrapped around the guide groove 21 in a regular manner, instead of being randomly and messily piled up on the power output shaft 12 or the mounting bracket 20. This not only reduces the number of times the cutting mechanism 100 is stuck or needs to be stopped for cleaning due to entanglement, thus ensuring the continuity and efficiency of the cutting operation, but also allows the operator to easily remove the entangled material from the guide groove 21 manually after the work is completed, greatly simplifying the maintenance work.

[0045] It should be noted that after the cutting mechanism 100 cuts the grassy vegetation to be cut using the cutting blade 30, the cut grass clippings may become tangled and entangled in the gaps between the output shaft and the mounting bracket 20, or between the mounting bracket 20 and the cutting blade 30, and may even intrude into the bearing of the power output shaft 12, leading to increased rotational resistance and decreased efficiency. In severe cases, this may jam the mechanism or damage the drive component 10. Therefore, this application constructs a guide groove 21 on the periphery of the mounting bracket 20 to confine the entangled material to a predetermined area, effectively avoiding this problem.

[0046] In one alternative implementation, such as Figures 4 to 8 As shown, the mounting bracket 20 includes a main body 23, a stop 22, and a connecting part 24. A mounting hole 26 is formed in the main body 23 and extends along the height of the main body 23 for supporting the power output shaft 12 of the drive member 10. The stop 22 is located on the periphery of the main body 23 at the end of the main body 23 closest to the drive member 10, preventing the thrown-up grass clippings from continuing to move upwards and wrapping around the power output shaft 12, bearings, or the drive member 10 body. The connecting part 24 is located on the periphery of the main body 23 at the end of the main body 23 away from the drive member 10, for mounting and fixing the cutting blade 30, allowing the cutting blade 30 to be mounted on the connecting part 24. The stop portion 22, the connecting portion 24, and the main body portion 23 together form a guide groove 21, so that the connecting portion 24 can prevent the grass clippings generated by cutting from falling directly downwards, the stop portion 22 can prevent the grass clippings generated by cutting from spreading upwards or even invading dangerous areas such as the bearing part of the power output shaft 12, and the main body portion 23 provides an attachment surface for grass clippings to entangle, thus completely solving the problem of grass clippings invading the bearing part and the output shaft.

[0047] In an alternative embodiment, the sidewall of the stop portion 22 is inclined inward toward the connecting portion 24, which effectively prevents grass clippings from slowly winding upward along the sidewall. This not only solves the problem of accommodating tangled grass clippings, but also physically prevents the upward winding of the clippings.

[0048] It should be noted that when the cutting blade 30 rotates at high speed to cut the grass, the grass clippings thrown up are not only subjected to centrifugal force, but also generate a tangential force along the sidewall surface when they come into contact with the sidewall of the stop 22. If the sidewall of the stop 22 is vertical, this tangential force may guide the grass clippings upward along the vertical wall surface, and over time they may slowly entangle in the upper area. However, in this application, the sidewall of the stop 22 is set to be inclined inward, so this tangential force generates a downward component force, thereby actively pushing or throwing the contacting grass clippings back into the guide groove 21 below, effectively preventing the gradual problem of grass clippings slowly entangled upward along the sidewall of the stop 22.

[0049] For example, the outer periphery of the stop portion 22 is formed with an inwardly inclined surface 22, which can be used to guide the grass clippings back into the guide groove 21, effectively preventing the grass clippings from tangling upwards.

[0050] In one alternative implementation, such as Figures 1 to 5 As shown, the cutting mechanism 100 also includes a protective cover 40. The drive unit 10 is disposed on the protective cover 40. The cutting blade 30 and the mounting bracket 20 are both located within the protective space 41 formed by the protective cover 40, so as to completely cover the high-speed rotating cutting blade 30 and the mounting bracket 20, effectively preventing the operator's hands, feet or other body parts from accidentally contacting the blade, and also blocking flying stones, debris and other projectiles, greatly improving the safety of the equipment.

[0051] In one optional embodiment, the entrance side of the protective space 41 is provided with a comb-like structure, and a comb groove 42 is formed between two adjacent comb-like structures, allowing the grass to be cut to enter the protective space 41 through the comb groove 42 for cutting. Simultaneously, the comb-like structure can actively separate the grass to be cut from surrounding foreign objects, reducing the probability of foreign objects such as metal / stones entering, preventing damage to the cutting blade 30 from the source, reducing abnormal impact on the cutting blade 30, and preventing overload of the drive component 10 or chipping of the cutting blade 30. The comb groove 42 only allows the grass to be cut to pass through; its main purpose is to prevent excessively large or hard foreign objects from entering the protective space 41, avoiding increased load on the drive component 10 due to foreign objects entering, which could cause the cutting mechanism 100 to stop.

[0052] In an optional embodiment, the top wall of the protective cover 40 is provided with an annular protrusion 43 extending toward the cutting blade 30. The annular protrusion 43 surrounds the outside of the stop portion 22, and the lowest end of the annular protrusion 43 is lower than the end of the stop portion 22 near the drive member 10, forming a sleeve-like or fence-like structure. This allows the stop portion 22 to be housed within it, forming a narrowed entrance at the top, which physically blocks the path of grass clippings upward. That is, the grass clippings will impact the inner wall of the annular protrusion 43 and, under the action of the rotating airflow, be thrown back into the guide groove 21 below, or be confined in the narrow space between the annular protrusion 43 and the stop portion 22, preventing them from intruding into the bearing area and the output shaft. This ensures that even under extreme operating conditions, the problem of grass clipping entanglement can be completely solved, eliminating the possibility of malfunctions caused by grass clippings.

[0053] In an alternative embodiment, the sidewall of the annular protrusion 43 is inclined inward toward the connecting portion 24 so as to work in conjunction with the inclined surface 22 on the stop portion 22. When a few grass clippings continue to move upward beyond the protection of the inclined surface 22, the sidewall of the annular protrusion 43 can once again change the direction of force on the grass clippings, so that the grass clippings can generate a strong downward component force when moving along the inclined wall under the action of centrifugal force and friction. This component force can efficiently throw the grass clippings back or guide them back into the guide groove 21 below, instead of allowing them to climb upward along the vertical wall.

[0054] In an optional embodiment, the maximum outer diameter D1 of the stop portion 22 is not less than the diameter D2 of the circumscribed circle of the connecting portion 24, so that the projected area of ​​the stop portion 22 can completely cover the connecting portion 24 and the opening of the entire guide groove 21, and also ensure that the grass clippings can make initial contact with the stop portion 22, so that the side wall of the stop portion 22 can actively push the contacted grass clippings into the guide groove 21 below.

[0055] In an optional embodiment, the mounting bracket 20 is provided with a limiting part 25, which is located on the side of the stop part 22 opposite to the connecting part 24. The diameter of the limiting part 25 gradually decreases towards the side of the stop part 22 to form a frustum-shaped or guide cone-shaped structure, which is used to limit the installation position of the mounting bracket 20 and prevent the stop part 22 from contacting the top wall of the protective cover 40.

[0056] In one alternative implementation, such as Figures 3 to 7 As shown, a positioning post 231 is provided on the connecting part 24, and a positioning hole 31 is provided on the cutting blade 30. The positioning post 231 passes through the positioning hole 31, which realizes the locking of the cutting blade 30 in the rotation direction, so that the torque on the connecting part 24 can be transmitted through the positioning post 231. The fastener 50 is only used to provide axial clamping force to the cutting blade 30 to prevent the blade from falling off, which greatly improves the rigidity and reliability of the connection.

[0057] In an optional embodiment, the cutting mechanism 100 further includes a fastener 50. The inner wall of the fastener 50 is provided with a first threaded section 51, and the power output shaft 12 of the drive member 10 is provided with a second threaded section 121. The first threaded section 51 and the second threaded section 121 are threadedly engaged to generate a large axial locking force, ensuring that there is no axial movement between the mounting bracket 20 and the drive member 10, and that the cutting blade 30 is firmly pressed onto the connecting part 24 and will not fall off. In this application, the positioning post 231 can bear most of the torque transmission, while the fastener 50 can provide a large frictional force to assist in the transmission of torque, especially when the cutting blade 30 is subjected to impact loads, thus providing double protection.

[0058] like Figures 1 to 8As shown, according to a second aspect of this application, this application provides a self-moving operating device, including the cutting mechanism 100 described above on the device body, the cutting mechanism 100 being disposed on the device body.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is 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.

Claims

1. A cutting mechanism, characterized in that, The device includes a drive unit, a mounting bracket, and a cutting blade. The mounting bracket has a mounting hole in the middle. The power output shaft of the drive unit passes through the mounting hole and extends to the side of the mounting bracket away from the drive unit. The cutting blade is connected to the power output shaft of the drive unit so that the drive unit drives the cutting blade to rotate, thereby cutting the grass vegetation to be cut. The mounting bracket has a guide groove on its periphery, which is used to guide the grass clippings cut by the cutting blade to wrap around the guide groove.

2. The cutting mechanism according to claim 1, characterized in that, The mounting bracket includes: The main body portion, wherein the mounting hole is formed in the main body portion and extends along the height direction of the main body portion; A stop portion is provided on the periphery of the main body portion, located at one end of the main body portion near the drive member; A connecting portion is provided on the periphery of the main body and located at the end of the main body away from the driving member, and the cutting blade is provided on the connecting portion; The stop portion, the connecting portion, and the main body portion together form the guide groove.

3. The cutting mechanism according to claim 2, characterized in that, The sidewall of the stop portion is inclined inward toward the connecting portion.

4. The cutting mechanism according to claim 2, characterized in that, The cutting mechanism also includes a protective cover, the driving component is disposed on the protective cover, and the cutting blade and the mounting bracket are both located within the protective space formed by the protective cover.

5. The cutting mechanism according to claim 4, characterized in that, The top wall of the protective cover is provided with an annular protrusion that extends toward the cutting blade and surrounds the outside of the stop portion. The lowest end of the annular protrusion is lower than the end of the stop portion near the drive member.

6. The cutting mechanism according to claim 5, characterized in that, The sidewall of the annular protrusion slopes inward toward the connecting portion.

7. The cutting mechanism according to claim 2, characterized in that, The maximum outer diameter of the stop portion is not less than the diameter of the circumscribed circle of the connecting portion.

8. The cutting mechanism according to claim 2, characterized in that, The connecting part is provided with a positioning post, and the cutting blade is provided with a positioning hole, with the positioning post passing through the positioning hole.

9. The cutting mechanism according to claim 1, characterized in that, The cutting mechanism also includes a fastener, the inner wall of which is provided with a first threaded section, and the power output shaft of the drive component is provided with a second threaded section, the first threaded section and the second threaded section being threadedly engaged.

10. A self-moving operating device, characterized in that, It includes a main body of equipment and a cutting mechanism as described in any one of claims 1 to 9, wherein the cutting mechanism is disposed on the main body of equipment.

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