Cutting mechanism and mower
By setting a guide structure on the second side of the lawnmower's cutting component, a positive pressure zone for airflow is formed, which solves the problem of grass entanglement in the cutting component, ensures that the lawnmower can work normally under wet conditions, and improves cutting efficiency and motor efficiency.
Patent Information
- Application Number
- CN202520345319.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-02-27
AI Technical Summary
In wet or rainy conditions, grass blades can easily get tangled on the back of the cutting parts of a lawnmower, leading to increased motor power consumption or even shutdown, thus affecting normal operation.
A flow guide structure is provided on the second side of the cutting component to form an airflow that flows from the first side to the second side and is discharged along the extension direction of the protective component, forming a positive pressure zone to prevent grass debris from being adsorbed and to blow away the grass debris, thus preventing entanglement.
It effectively prevents grass debris from getting tangled in the cutting parts, reduces motor power consumption, ensures the lawnmower works normally, and improves cutting efficiency.
Smart Images
Figure CN223810182U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawnmower technology, and in particular to a cutting mechanism and a lawnmower. Background Technology
[0002] When a lawnmower is mowing, the cutting component rotates at high speed, creating negative pressure on its back. The cut grass is easily sucked onto the back of the cutting component and gets tangled on the motor shaft. This is especially true in wet or rainy conditions, where wet grass blades can easily accumulate on the back of the cutting component. This not only increases the motor's power consumption but can also cause the cutting component to stop rotating, preventing the lawnmower from working properly. Utility Model Content
[0003] In view of this, the present invention proposes a cutting mechanism and a lawn mower.
[0004] The cutting mechanism proposed in the first aspect of this utility model includes:
[0005] A cutting component having a first side and a second side disposed opposite to the first side;
[0006] A protective component is disposed on the second side of the cutting component and spaced apart from the cutting component;
[0007] The cutting component is provided with a flow guiding structure, which is used to generate airflow when the cutting component is running. The airflow flows from the first side of the cutting component to the second side of the cutting component and is discharged along the extension direction of the protective component.
[0008] The lawnmower according to the second aspect of this utility model includes:
[0009] Organism;
[0010] A wheel mechanism, connected to the body, is used to drive the lawnmower to move.
[0011] The aforementioned cutting mechanism;
[0012] The cutting mechanism is connected to the machine body and is used to cut the object to be cut.
[0013] From the above technical scheme can be seen, the utility model discloses a cutting mechanism, through setting up the flow guide mechanism at the cutting part, and the flow guide mechanism can form the airflow flowing from the first side of the cutting part to the second side of the cutting part when the cutting part is running, this part of airflow can form the air positive pressure area at the second side of the cutting part, that is, avoids forming the air negative pressure area at the second side of the cutting part, therefore, the grass residue will not be adsorbed to the second side of the cutting part because of the negative pressure, and this part of airflow sweeps to the protection part, can form the drying effect to the side of the protection part towards the cutting part, can avoid the grass residue adhering to the side of the protection part towards the cutting part. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed to be used in the embodiment description will be simply introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained without creative labor.
[0015] Figure 1 It is the structure schematic drawing of the cutting mechanism of an embodiment of the utility model;
[0016] Figure 2 It is the explosion schematic drawing of the cutting mechanism of an embodiment of the utility model;
[0017] Figure 3 It is the section view schematic drawing of the cutting mechanism of an embodiment of the utility model;
[0018] Figure 4 It is the three-dimensional structure schematic drawing of the cutting part of an embodiment of the utility model;
[0019] Figure 5 It is the structure schematic drawing of the cutting part of an embodiment of the utility model from the overhead perspective;
[0020] Figure 6 It is the structure schematic drawing of the cutting part of an embodiment of the utility model from the side view;
[0021] Figure 7 It is the three-dimensional structure schematic drawing of the cutting part of another embodiment of the utility model;
[0022] Figure 8is a top view of the cutting component according to the embodiment of the utility model;
[0023] Figure 9 is a three-dimensional structure diagram of the cutting component according to the embodiment of the utility model;
[0024] Figure 10 is a top view of the cutting component according to the embodiment of the utility model.
[0025] Mark explanation:
[0026] 100, cutting mechanism;
[0027] 10, cutting component; 11, flow guide structure; 12, support unit; 13, annular part; 14, cutter head; 15, blade; 111, flow guide blade; 112, air flow channel; 1111, blade base; 1112, blade end; 1113, leading edge; 1114, trailing edge; 1115, first flow guide part; 1116, second flow guide part; 10a, first side; 10b, second side; E, air flow; M, rotation plane; F, rotation direction;
[0028] 20, protection component;
[0029] 30, motor;
[0030] 50, motor fixing seat; 51, accommodating cavity;
[0031] 60, cutting component fixing seat. Specific embodiment
[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, other embodiments obtained by the person skilled in the art without making creative labor all belong to the range of protection of the utility model.
[0033] As Figures 1 to 3As shown, an embodiment of this utility model proposes a cutting mechanism 100, which includes a cutting component 10 and a protective component 20. The cutting component 10 has a first side 10a and a second side 10b opposite to the first side 10a. The protective component 20 is disposed on the second side 10b of the cutting component 10 and spaced apart from the cutting component 10. The cutting component 10 is provided with a flow guiding structure 11, which is used to generate an airflow E during the operation of the cutting component 10. The airflow E flows from the first side 10a of the cutting component 10 to the second side 10b of the cutting component 10 and is discharged along the extending direction of the protective component 20. In normal use, the first side 10a of the cutting mechanism 100 faces the ground, and the second side 10b faces away from the ground.
[0034] The cutting mechanism 100 proposed in this embodiment of the present invention, by providing a flow guiding mechanism on the cutting component 10, can form an airflow from the first side 10a of the cutting component 10 to the second side 10b of the cutting component 10 during operation. This airflow can form a positive pressure zone on the second side 10b of the cutting component 10, thus avoiding the formation of a negative pressure zone on the second side 10b of the cutting component 10. Therefore, grass debris will not be adsorbed onto the second side of the cutting component 10 due to negative pressure. Moreover, this airflow blows onto the protective component 20, which can dry the side of the protective component 20 facing the cutting component 10, thus preventing grass debris from adhering to the side of the protective component 20 facing the cutting component 10. Furthermore, the airflow is discharged along the extension direction of the protective component 20, which is not only opposite to the direction in which the grass residue is adsorbed onto the cutting component 10, but also prevents the grass residue from adsorbing onto the second side 10b of the cutting component 10, thus effectively solving the problem of grass entanglement on the cutting component 10. Moreover, it can sweep the grass residue to make it roll, thereby enabling the cutting component 10 to achieve a better chopping effect on the grass residue.
[0035] like Figure 4 and Figure 5 As shown, in some embodiments, the cutting component 10 includes a support unit 12, an annular portion 13, and the flow guiding structure 11. The support unit 12 is used to connect to a motor 30 that drives the cutting component 10. The annular portion 13 surrounds the support unit 12. The flow guiding structure 11 is disposed between the support unit 12 and the annular portion 13 and connects the support unit 12 and the annular portion 13. The airflow generated by the flow guiding structure 11 is guided by the protective component 20 and blows towards the annular portion 13. In this embodiment, the airflow is opposite to the direction in which grass debris is adsorbed onto the cutting component 10, which can prevent grass debris from adsorbing onto the second side 10b of the cutting component 10.
[0036] It should be noted that the annular portion 13 can be wide or narrow in the radial direction of the cutting component 10, depending on the actual design requirements. For example, in one embodiment, such asFigure 5 As shown, the annular portion 13 has a relatively large width, and in this embodiment, the width of the annular portion 13 is approximately one fourth of the radius of the cutting member 10. For example, in another embodiment, as shown in FIG. 2, the annular portion 13 also has a relatively large width, and in this embodiment, the width of the annular portion 13 is approximately one third of the radius of the cutting member 10. Figure 10 As shown, the annular portion 13 has a relatively large width, and in this embodiment, the width of the annular portion 13 is approximately one fourth of the radius of the cutting member 10. For example, in another embodiment, as shown in FIG. 2, the annular portion 13 also has a relatively large width, and in this embodiment, the width of the annular portion 13 is approximately one third of the radius of the cutting member 10. Figure 8 As shown, the annular portion 13 has a relatively small width, and in this embodiment, the width of the annular portion 13 is approximately one twentieth of the radius of the cutting member 10.
[0037] In some embodiments, the support unit 12, the annular portion 13 and the flow guiding structure 11 are integrally formed. In this way, the cutting member 10 has a relatively high strength and a relatively long service life. In some embodiments, the support unit 12, the annular portion 13 and the flow guiding structure 11 are integrally formed by injection molding using a plastic material. Of course, the support unit 12, the annular portion 13 and the flow guiding structure 11 are not limited to being integrally formed, and for example, in other embodiments, the support unit 12, the annular portion 13 and the flow guiding structure 11 are separately provided and then connected together by mechanical connection, and the specific connection manner can be determined according to actual design requirements.
[0038] As shown, in some embodiments, the flow guiding structure 11 includes at least two flow guiding vanes 111, which are arranged around the support unit 12 and form air flow passages 112 between adjacent flow guiding vanes 111. The flow guiding vane 111 includes a vane base 1111 and a vane tip 1112, the vane base 1111 is connected to the support unit 12, the vane tip 1112 is connected to the annular portion 13, and the vane base 1111 is arranged obliquely relative to a rotation plane M formed when the cutting member 10 is in operation. Figures 4 to 6 As shown, in some embodiments, the flow guiding structure 11 includes at least two flow guiding vanes 111, which are arranged around the support unit 12 and form air flow passages 112 between adjacent flow guiding vanes 111. The flow guiding vane 111 includes a vane base 1111 and a vane tip 1112, the vane base 1111 is connected to the support unit 12, the vane tip 1112 is connected to the annular portion 13, and the vane base 1111 is arranged obliquely relative to a rotation plane M formed when the cutting member 10 is in operation.
[0039] In some embodiments, the inclination angle of the blade base 1111 relative to the rotation plane M is 15 degrees to 45 degrees. Optionally, in some embodiments, the inclination angle of the blade base 1111 relative to the rotation plane M is any one of 15 degrees, 16 degrees, 17 degrees, 18 degrees, 19 degrees, 20 degrees, 21 degrees, 22 degrees, 23 degrees, 24 degrees, 25 degrees, 26 degrees, 27 degrees, 28 degrees, 29 degrees, 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, 36 degrees, 37 degrees, 38 degrees, 39 degrees, 40 degrees, 41 degrees, 42 degrees, 43 degrees, 44 degrees, 45 degrees, or any value between any two adjacent values, which can be determined according to actual design requirements. In this embodiment, by setting the inclination angle of the blade base 1111 relative to the rotation plane M to the above values, the airflow can be guided from the first side 10a of the cutting component 10 to the second side 10b of the cutting component 10 while avoiding excessive resistance to the rotation of the cutting component 10.
[0040] In some embodiments, the second side 10b of the guide vane 111 smoothly transitions to the annular portion 13. In this embodiment, the resistance to the airflow can be reduced, and the airflow can be effectively diffused towards the annular portion 13.
[0041] As shown in Figure 4 and Figure 5 In some embodiments, the projection profile of the guide vane 111 on the first plane is a sector, and the first plane is perpendicular to the central axis L of the support unit 12.
[0042] It should be noted that the projection profile of the guide vane 111 on the first plane is not limited to being a sector. For example, in other embodiments, as shown in Figure 7 and Figure 8 The guide vane 111 includes a leading edge portion 1113 facing the windward direction and a trailing edge portion 1114 facing the leeward direction, and the leading edge portion 1113 and the trailing edge portion 1114 extend curvedly from the blade base 1111 to the blade tip 1112 towards the rotation direction F of the cutting component 10. That is, the guide vane 111 extends curvedly from the support unit 12 to the annular portion 13. In this embodiment, by setting the leading edge portion 1113 and the trailing edge portion 1114 to extend curvedly from the blade base 1111 to the blade tip 1112 towards the rotation direction of the cutting component 10, the centrifugal force of the airflow at the blade tip 1112 can be reduced, energy loss can be reduced, and a better airflow guiding effect can be achieved.
[0043] As shown in Figure 8 In some embodiments, the width of the guide vane 111 gradually increases from the blade base 1111 to the blade tip 1112. In this embodiment, the high linear velocity and large space at the blade tip are conducive to increasing the airflow of the guide vane 111, thereby achieving a better blowing effect.
[0044] As shown in Figure 8 some embodiments, the blade bases 1111 of two adjacent guide vanes 111 are spaced apart from each other, and the blade tips 1112 of two adjacent guide vanes 111 are connected to each other. With this implementation, the overall strength of the cutting component 10 can be improved.
[0045] As shown in Figure 9 and Figure 10 some embodiments, the guide structure 11 includes at least two guide vanes 111 arranged around the support unit 12, and a gas flow passage 112 is formed between two adjacent guide vanes 111. The guide vane 111 includes a first guide portion 1115 and a second guide portion 1116. The first guide portion 1115 includes a first end and a second end. The first end of the first guide portion 1115 is connected to the support unit 12, and the second end of the first guide portion 1115 is connected to the annular portion 13. The second guide portion 1116 is arranged on a side of the first guide portion 1115 facing the protection component 20. The second guide portion 1116 extends from the first end of the first guide portion 1115 towards the second end of the first guide portion 1115, and is curvedly extended towards the opposite direction of the rotation direction of the cutting component 10.
[0046] When the cutting component 10 is in operation, the gas flow flowing to the second side 10b of the cutting component 10 will be diffused towards the annular portion 13 under the action of the centrifugal force of the second guide portion 1116, forming a gas flow in the opposite direction of the direction in which the grass residue is adsorbed to the cutting component 10, thereby preventing the grass residue from being adsorbed to the second side 10b of the cutting component 10, and thus the problem of grass entanglement of the cutting component 10 can be well solved. It should be noted that the second guide portion 1116 can also guide the gas flow to blow towards the protection component 20, so that the side of the protection component 20 facing the cutting component 10 remains dry and is not easy to stick to the grass residue.
[0047] As shown in Figure 10 some embodiments, the distance between two adjacent second guide portions 1116 gradually increases from the first end of the first guide portion 1115 towards the second end of the first guide portion 1115. With this implementation, the flow rate of the gas flow can be increased, thereby forming a better blowing effect. Of course, in other embodiments, the distance between two adjacent second guide portions 1116 can also be kept unchanged from the first end of the first guide portion 1115 towards the second end of the first guide portion 1115, which can be determined according to actual design needs.
[0048] As shown in Figure 9 and Figure 10As shown, in some embodiments, the first flow guide part 1115 includes a leading edge part 1113 facing the windward direction and a trailing edge part 1114 facing the leeward direction, the leading edge part 1113 and the trailing edge part 1114 extend curvedly from the first end to the second end towards the opposite direction of the rotation direction F of the cutting component 10. The second flow guide part 1116 extends along the leading edge part 1113 towards the direction of the guard component 20. With this implementation, when the air flow reaches the second side 10b of the cutting component 10, it will immediately contact the second flow guide part 1116 and be pushed by the second flow guide part 1116, and when spreading out between the two second flow guide parts 1116, it has a larger kinetic energy, thus achieving a better blowing effect. Of course, in other embodiments, the second flow guide part 1116 can also be arranged not to extend along the leading edge part 1113, for example, the second flow guide part 1116 is arranged between the leading edge part 1113 and the trailing edge part 1114, or the second flow guide part 1116 extends along the trailing edge part 1114, which can be determined according to actual design needs. Through the arrangement of the second flow guide part 1116, the cutting component 10 can effectively keep the to-be-cut objects (such as grass) in a vertical state during cutting, achieving a better cutting effect, and after cutting, the arrangement of the leading edge part makes the wind speed on the side of the guard component 20 larger, which can effectively guide the cut grass clippings away and avoid the grass clippings adhering to the guard component 20.
[0049] In some embodiments, the number of the flow guide vanes 111 is 3 to 12. For example, in an embodiment, as shown in Figure 5 the number of the flow guide vanes 111 is 3. For another example, in another embodiment, as shown in Figure 10 the number of the flow guide vanes 111 is 6. For another example, in another embodiment, as shown in Figure 8 the number of the flow guide vanes 111 is 12. With this implementation, by setting the number of the flow guide vanes 111 to be 3 to 12, the air flow formed by the flow guide structure 11 can be uniformly diffused to the surrounding, and the weight and rotation resistance of the cutting component 10 caused by the flow guide vanes 111 can be avoided.
[0050] As shown in Figures 1 to 5 in some embodiments, the cutting component 10 includes a cutter disc 14, the radius of the cutter disc is R, and along the radial direction of the cutter disc 14, the length of the flow guide vane 111 is r, where r = (50% to 80%) R. With this implementation, by setting the length of the flow guide vane 111 to the above value, the air flow formed when the cutting component 10 rotates can be uniformly flowed to the entire second side 10b of the cutting component 10. Preferably, in some embodiments, r = (70% to 80%) R.
[0051] As shown in Figures 1 to 3As shown, in some embodiments, the cutting component 10 includes a cutter head 14 and a blade 15. The cutter head 14 has a first side and a second side opposite to the first side. A protective component 20 is disposed on the second side of the cutter head 14, and the blade 15 is disposed on the first side 10a of the cutter head 14 and connected to the cutter head 14. It should be noted that the blade 15 is not limited to being disposed on the first side 10a of the cutter head 14. For example, in some other embodiments, the blade 15 is disposed on the second side 10b of the cutter head 14, or one end of the cutting component 10 may be embedded in the cutter head 14. The specific placement can be determined according to actual design requirements.
[0052] In some embodiments, such as Figure 5 and Figure 10 As shown, the blade 15 is connected to the annular portion 13. In some other embodiments, such as Figure 8 As shown, the blade 15 is connected to the guide vane 111.
[0053] like Figure 2 As shown, in some embodiments, the number of blades 15 is six, and the six blades 15 are evenly distributed around the outer periphery of the cutting component 10. Of course, the number of blades 15 is not limited to six; it can also be one, two, three, four, five, seven, or more than seven, depending on the actual design requirements.
[0054] like Figures 1 to 3 As shown, in some embodiments, the cutting mechanism 100 further includes a motor 30, which is disposed on the side of the protective member 20 opposite to the cutting member 10, and the output shaft of the motor 30 passes through the protective member 20 and is connected to the cutting member 10.
[0055] like Figures 1 to 3 As shown, in some embodiments, the cutting mechanism 100 further includes a motor mounting base 50 and a cutting component mounting base 60. The motor mounting base 50 is provided with a receiving cavity 51. The cutting component mounting base 60 is disposed outside the motor mounting base 50. The motor 30 is housed in the receiving cavity 51. The output shaft of the motor 30 extends out of the motor mounting base 50 and is connected to the cutting component mounting base 60. The cutting component 10 is connected to the cutting component mounting base 60.
[0056] An embodiment of this utility model also proposes a lawnmower, which includes a body, a walking mechanism, and the aforementioned cutting mechanism 100. The walking mechanism and the cutting mechanism 100 are connected to the body. The walking mechanism is configured to drive the lawnmower to move, and the cutting mechanism 100 is configured to cut the lawn. One, two, or more cutting mechanisms 100 can be configured. The lawnmower proposed in this embodiment, by employing the aforementioned cutting mechanism 100, has the advantage of preventing grass debris from adhering to the second side 10b of the cutting component 10, thereby effectively solving the problem of grass entanglement on the cutting component 10.
[0057] The details, connection relationship, feature data, extension description and beneficial effects of the cutting mechanism 100 of the mower provided in the embodiment can refer to the above-described embodiments, and will not be described herein.
[0058] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.
Claims
1. A cutting mechanism, characterized by, The cutting component comprises: a support unit for connecting a motor driving the rotation of the cutting component; a ring-shaped portion surrounding the support unit; the flow guide structure is arranged between the support unit and the ring-shaped portion, and the airflow formed by the flow guide structure is blown towards the direction of the ring-shaped portion under the guidance of the protective component.
2. The cutting mechanism of claim 1, wherein, The flow guide structure comprises at least two flow guide vanes arranged around the support unit, and an airflow channel is formed between adjacent two flow guide vanes. The flow guide vane comprises a vane base and a vane tip, the vane base is connected with the support unit, and the vane tip is connected with the ring-shaped portion, and the vane base is arranged obliquely relative to the rotation plane formed when the cutting component rotates. The inclination angle of the vane base relative to the rotation plane is 15-45 degrees. The projection profile of the flow guide vane on a first plane is a sector, and the first plane is perpendicular to the central axis of the support unit.
3. The cutting mechanism of claim 2, wherein, The flow guide vane comprises a leading edge portion facing the windward direction and a trailing edge portion facing the leeward direction, and the leading edge portion and the trailing edge portion extend curvedly towards the rotation direction of the cutting component from the vane base to the vane tip. From the vane base to the vane tip, the width of the flow guide vane gradually increases.
4. The cutting mechanism of claim 3, wherein, The vane bases of adjacent two flow guide vanes are arranged spaced apart from each other, and the vane tips of adjacent two flow guide vanes are connected with each other.
5. The cutting mechanism of claim 3 wherein, The flow guide structure comprises at least two flow guide vanes arranged around the support unit, and an airflow channel is formed between adjacent two flow guide vanes.
6. The cutting mechanism of claim 3 wherein, The flow guide vane comprises a first flow guide portion and a second flow guide portion, the first flow guide portion comprises a first end and a second end, the first end of the first flow guide portion is connected with the support unit, the second end of the first flow guide portion is connected with the ring-shaped portion, the second flow guide portion is arranged on the side of the first flow guide portion facing the protective component, the second flow guide portion extends from the first end of the first flow guide portion towards the second end of the first flow guide portion, and the second flow guide portion extends curvedly towards the opposite direction of the rotation direction of the cutting component.
7. The cutting mechanism of claim 6 wherein, From the direction from the first end of the first flow guide portion towards the second end of the first flow guide portion, the spacing between adjacent two second flow guide portions gradually increases.
8. The cutting mechanism of claim 6 wherein, The first flow guide portion comprises a leading edge portion facing the windward direction and a trailing edge portion facing the leeward direction, and the leading edge portion and the trailing edge portion extend curvedly towards the opposite direction of the rotation direction of the cutting component from the first end to the second end; 9. The cutting mechanism of claim 2 wherein, The second flow guide portion extends towards the protective component along the leading edge portion. 10. The cutting mechanism of claim 9, wherein, 11. The cutting mechanism of claim 9 wherein, 12. The cutting mechanism of claim 3 or 9, wherein, The number of the guide vanes is 3 to 12.
13. The cutting mechanism of claim 3 or 9, wherein, The cutting component comprises a cutter head, the radius of the cutter head is R, the length of the guide vanes along the radial direction of the cutter head is r, wherein r=(50%~80%)R.
14. The cutting mechanism of any one of claims 1 to 11, wherein, The cutting component comprises a cutter head and a blade, the cutter head has a first side and a second side arranged opposite to the first side, the protection component is arranged on the second side of the cutter head, and the blade is arranged on the first side of the cutter head and connected with the cutter head; and / or, The cutting mechanism further comprises a motor, the motor is arranged on the side of the protection component which is away from the cutting component, and the output shaft of the motor is connected with the cutting component through the protection component.
15. A lawnmower characterised in that, Comprise: a machine body; a walking mechanism connected with the machine body, used for driving the lawn mower to walk; the cutting mechanism according to any one of claims 1 to 14; wherein the cutting mechanism is connected with the machine body and used for cutting the object to be cut.