Cutting assembly and lawnmower

Abstract

The utility model relates to the field of mower, especially cut grass machine of cutting assembly, including cutter head, blade, connecting piece and at least two protection, the cutter head can rotate around first rotation axis, the cutter head has lower installation surface, the lower installation surface is close to ground when mower is in working condition, the blade is connected in the lower installation surface around second rotation axis rotation through the connecting piece, the protection and the connecting piece all set up in the lower installation surface, along the circumferential of cutter head, set up at least one the blade between two adjacent protection, the protection protrudes to the direction away from the lower installation surface, the lowest point of protection is lower than the lowest point of any part on the connecting piece, the utility model can protect the connecting piece to certain.

Description

Technical Field

[0001] This utility model belongs to the field of lawnmowers, and particularly relates to a cutting component and a lawnmower. Background Technology

[0002] Traditional blade cutter designs typically employ a flat layout, with blades directly mounted to the blade body via fastening bolts. However, this approach (flat blade cutter with blades directly mounted) has a significant drawback: after the blades are installed, the head of the screw is completely exposed on the working surface below the blade, and its position is usually lower than the designed cutting height of the blade. This means that during mowing operations, especially when the blade encounters uneven ground, is near hard boundaries (such as curbs or tree roots), or has rocks or hard objects present, the screw head on the blade will inevitably collide and rub directly with the ground or obstacles.

[0003] Therefore, there is an urgent need for a solution that can protect the screw head that secures the blade without sacrificing the blade's mowing performance. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a cutting component and a lawnmower to address the lack of protection for the screw heads of existing lawnmowers.

[0005] To address the aforementioned problems, this utility model provides a cutting assembly, including a blade disc, blades, connectors, and at least two protective components. The blade disc is rotatable about a first rotation axis. The blade disc has a lower mounting surface that is close to the ground when the lawnmower is in operation. The blade is rotatably connected to the lower mounting surface about a second rotation axis via the connector. Both the protective member and the connecting member are disposed on the lower mounting surface. Along the circumference of the cutter head, at least one blade is disposed between two adjacent protective members. The protective member protrudes in a direction away from the lower mounting surface, and the lowest point of the protective member is lower than the lowest point of any part of the connecting member.

[0006] Optionally, one side surface of the protective member is connected to the lower mounting surface, the cross-section of the protective member gradually decreases in the direction away from the lower mounting surface, and the outer wall of the protective member away from the cutter head is a smooth curved surface.

[0007] Optionally, the protective component and the cutter head are integrally formed.

[0008] Optionally, the protective element is detachably connected to the cutter head.

[0009] Optionally, the cutter head is provided with a threaded hole, and the blade is provided with a through hole; The connector includes a threaded section, a smooth section, and a nut connected in sequence. The threaded section is threaded into the threaded hole, and the smooth section passes through the through hole so that the blade can rotate around the smooth section. The nut is located on the side of the blade away from the cutter head, and the side of the nut near the threaded section can stop the blade.

[0010] Optionally, the length of the smooth segment is greater than the thickness of the blade, so that the blade can rotate around the smooth segment while also sliding between a first position and a second position along the axial direction of the smooth segment; When the blade is in the first position, the blade is located at the end of the smooth section near the threaded section; When the blade is in the second position, the blade is located at the end of the smooth section away from the threaded section.

[0011] Optionally, multiple blades and multiple connectors are provided, with each blade and connector corresponding to the other one-to-one.

[0012] Optionally, the device further includes a plurality of uniformly spaced blocking members surrounding the cutter head. The blocking members are disposed on the lower mounting surface and protrude in a direction away from the lower mounting surface. Each end of the blocking member is connected to two adjacent protective members. The lower mounting surface, the blocking members, and the protective members connected to the blocking members together define a receiving cavity, and the plurality of receiving cavities are isolated from each other. The plurality of blades, the blocking members, and the plurality of connecting members correspond one-to-one, and the connecting members and the blades are all disposed within the receiving cavities. The receiving cavity has a first opening and a second opening that are interconnected, and the blade can extend out of the receiving cavity from the second opening when rotating about the smooth section; the blocking member is used to prevent grass cut by one of the blades from entering the gap between the other blades and the lower mounting surface.

[0013] Optionally, the middle portion of the blocking member is recessed towards the center of the cutter head.

[0014] Optionally, the lowest point of the blocking member is lower than the lowest point of the smooth section, the lowest point of the nut is lower than the lowest point of the blocking member, and the lowest point of the protective member is lower than the lowest point of the blocking member.

[0015] Optionally, it may also include a reinforcing rib, one side of which is connected to the lower mounting surface, and the other side of which is connected to the blocking member.

[0016] Furthermore, this utility model also provides a lawnmower, including the aforementioned cutting components.

[0017] The present invention provides a cutting assembly and lawnmower in which the blade is positioned between two adjacent protective members, and the protective members are lower than any part of the connecting member during cutting. When encountering uneven ground or hard obstacles such as protruding stones, the protective members first contact the stones, thereby reducing the problem of the connecting member colliding with the ground or stones, reducing the damage rate of the connecting member, and to a certain extent, also reducing the probability of the blade colliding with the ground or stones, and extending the service life of the blade. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a side view of the cutting assembly provided in one embodiment of the present invention; Figure 2 This is a side sectional view of the cutting component provided in one embodiment of the present invention; Figure 3 This is a bottom view of the cutting assembly provided in one embodiment of the present invention; Figure 4 This is a top view of the cutting assembly provided in one embodiment of the present invention.

[0020] The reference numerals in the accompanying drawings are as follows: 1. Cutter head; 11. Lower mounting surface; 12. Upper mounting surface; 2. Blade; 21. Through hole; 3. Connector; 31. Threaded section; 32. Smooth section; 33. Nut; 4. Protective component; 5. Blocking component; 6. Reinforcing rib; 7. Receiving cavity. Detailed Implementation

[0021] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the 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 utility model 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 utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 4 As shown, one embodiment of this utility model provides a cutting assembly, including a blade disc 1, blades 2, a connector 3, and at least two protective members 4. The blade disc 1 is rotatable about a first rotation axis and has a lower mounting surface 11. When the lawnmower is in operation, the lower mounting surface 11 is close to the ground. The blades 2 are rotatably connected to the lower mounting surface 11 via the connector 3 about a second rotation axis. Both the protective members 4 and the connector 3 are disposed on the lower mounting surface 11. Along the circumference of the blade disc 1, at least one blade 2 is disposed between two adjacent protective members 4. The protective members 4 protrude in a direction away from the lower mounting surface 11, and the lowest point of the protective member 4 is lower than the lowest point of any part of the connector 3.

[0025] This embodiment is generally applied to lawn mowing-related products, such as smart lawn mowers, lawn mowers and other lawn mowing products. Therefore, in this embodiment, the lowest point is based on the vertical direction in real life, or on the lower mounting surface 11, with the direction away from the lower mounting surface 11 as the downward direction. The further away from the lower mounting surface 11, the lower the position. The lowest point is the position furthest away from the lower mounting surface 11.

[0026] Reference Figures 1 to 3The cutter head 1 also has an upper mounting surface 12, which is used to connect to the drive motor of the lawnmower. The output shaft of the drive motor is the first rotation axis. The drive motor drives the cutter head 1 to rotate around the first rotation axis. When the cutter head 1 rotates, it drives the blades 2 on it to rotate around the two connecting parts around the second rotation axis. The rotating blades 2 cut the grass. Because the blades 2 are positioned between two adjacent protective parts 4, and the protective parts 4 are lower than any part of the connecting parts 3 during cutting, when encountering uneven ground or hard obstacles such as protruding stones, the protective parts 4 will contact the stones first. This reduces the problem of the connecting parts 3 colliding with the ground or stones, reduces the damage rate of the connecting parts 3, and to a certain extent, also reduces the probability of the blades 2 colliding with the ground or stones, thus extending the service life of the blades 2.

[0027] Specifically, one side surface of the protective member 4 is connected to the lower mounting surface 11, the cross-section of the protective member 4 gradually decreases in the direction away from the lower mounting surface 11, and the outer wall of the protective member 4 away from the cutter head 1 is a smooth curved surface. In this embodiment, the protective member 4 becomes smaller from top to bottom and the outer wall is curved, so that when the protective member 4 comes into contact with hard objects such as stones protruding from the ground, the impact of hard objects on the protective member 4 can be reduced.

[0028] In one embodiment, the protective element 4 and the cutter head 1 are integrally formed. Both the cutter head 1 and the protective element 4 are made of plastic, and the integral forming reduces production costs.

[0029] In other embodiments, the protective member 4 is detachably connected to the cutter head 1, for example, by bolts connecting the protective member 4 and the cutter head 1, or by clips connecting the protective member 4 and the cutter head 1.

[0030] In this embodiment, the middle part of the cutter head 1 is flat, and the outer periphery of the cutter head 1 is bent towards the ground, so that the outer periphery of the cutter head 1 is inclined relative to the middle part of the cutter head 1. The blade 2 and the connector 3 are disposed on the outer periphery of the cutter head 1.

[0031] In other embodiments, the cutter head 1 is flat, and the blade 2 is directly mounted on the lower surface of the cutter head 1.

[0032] Reference Figure 2 In one embodiment, the cutter head 1 is provided with a threaded hole, and the blade 2 is provided with a through hole 21; the connecting member 3 includes a threaded section 31, a smooth section 32 and a nut 33 connected in sequence. The threaded section 31 is threaded to the threaded hole, and the smooth section 32 passes through the through hole 21 so that the blade 2 can rotate around the smooth section 32. The nut 33 is located on the side of the blade 2 away from the cutter head 1, and the side of the nut 33 near the threaded section 31 can stop the blade 2.

[0033] In this embodiment, the blade 2 rotates around the smooth section 32, and the nut 33 is located below the smooth section 32 to limit the blade 2, so that the blade 2 always rotates around the smooth section 32.

[0034] In one embodiment, the length of the smooth section 32 is greater than the thickness of the blade 2, so that the blade 2 can rotate around the smooth section 32 while also sliding along the axial direction of the smooth section 32 between a first position and a second position; when the blade 2 is in the first position, the blade 2 is located at the end of the smooth section 32 near the threaded section 31; when the blade 2 is in the second position, the blade 2 is located at the end of the smooth section 32 away from the threaded section 31.

[0035] In this embodiment, the length of the smooth section 32 is greater than the thickness of the blade 2, so that the blade 2 can slide along the smooth section 32. This allows it to slide during rotary cutting. When cutting, the blade 2 can move up and down when it encounters a harder part of the plant stem, so that the blade 2 can cut through the relatively weak part of the plant stem, thereby improving the life of the blade 2.

[0036] Reference Figure 3 In one embodiment, multiple blades 2 and multiple connectors 3 are provided. The multiple blades 2 are evenly distributed around the cutter disc 1, so that the cutter disc 1 is subjected to uniform force when rotating. The multiple blades 2 and multiple connectors 3 correspond one-to-one.

[0037] In one embodiment, the cutting assembly further includes a plurality of uniformly spaced blocking members 5 surrounding the blade disc 1. The blocking members 5 are disposed on the lower mounting surface 11 and protrude in a direction away from the lower mounting surface 11. The two ends of the blocking members 5 are respectively connected to two adjacent protective members 4. The lower mounting surface 11, the blocking members 5, and the protective members 4 connected to the blocking members 5 together define a receiving cavity 7. The plurality of receiving cavities 7 are isolated from each other. The plurality of blades 2, the blocking members 5, and the plurality of connecting members 3 correspond one-to-one. The connecting members 3 and the blades 2 are all disposed within the receiving cavity 7. The receiving cavity 7 has a first opening and a second opening that are interconnected. When the blade 2 rotates around the smooth section 32, it can extend out of the receiving cavity 7 from the second opening. The blocking member 5 is used to prevent grass cut by one of the blades 2 from entering the gap between the other blades 2 and the lower mounting surface 11.

[0038] In this embodiment, a receiving cavity 7 is formed by the lower mounting surface 11, the blocking member 5, and the protective member 4. Each receiving cavity 7 is relatively independent and does not interfere with each other. When the blade 2 is cutting, the chopped grass may fly around with the blade 2 or the cutter head 1. If the blocking member 5 is not provided, the grass chopped by one of the blades 2 will most likely be thrown into the gap between the cutter head 1 and other blades 2, thereby affecting the normal rotation of other blades 2 and reducing the grass cutting efficiency.

[0039] Therefore, due to the presence of the blocking element 5, the grass that is thrown to other blades 2 will be blocked by the blocking element 5 (the side wall of the receiving cavity 7), thereby reducing the occurrence of grass shredded by one of the blades 2 being thrown into the gap between the cutter head 1 and other blades 2.

[0040] In other embodiments, the cutting assembly further includes a plurality of uniformly spaced blocking members 5 surrounding the blade disc 1. The blocking members 5 are disposed on the lower mounting surface 11 and protrude in a direction away from the lower mounting surface 11. The lower mounting surface 11 and the blocking members 5 together define a receiving cavity 7, and the plurality of receiving cavities 7 are isolated from each other. A plurality of blades 2, blocking members 5 and a plurality of connecting members 3 correspond one-to-one, and the connecting members 3 and blades 2 are all disposed within the receiving cavity 7. A protective member 4 is located within the receiving cavity 7.

[0041] The receiving cavity 7 has a first opening and a second opening that are interconnected. When the blade 2 rotates around the smooth section 32, it can extend out of the receiving cavity 7 from the second opening. The blocking member 5 is used to prevent grass cut by one of the blades 2 from entering the gap between the other blades 2 and the lower mounting surface 11.

[0042] In this embodiment, the protective member 4 does not need to be connected to the blocking member 5, and the protective member 4 can be placed inside the receiving cavity 7.

[0043] In one embodiment, the middle part of the blocking member 5 is recessed toward the center of the cutter head 1.

[0044] In this embodiment, the blocking member 5 is an arc-shaped strip, and the middle part of the blocking member 5 is recessed towards the center of the cutter head 1 to form a receiving cavity 7.

[0045] In this embodiment, the number of protective members 4 is the same as the number of blocking members 5. The adjacent ends of two adjacent blocking members 5 are connected to the same protective member 4. That is, the adjacent ends of each pair of adjacent blocking members 5 share the same protective member 4. Compared with each blocking member 5 being adapted to two protective members 4, the number of protective members 4 is reduced, which indirectly reduces the distribution density of protective members 4, thereby increasing the volume of the receiving cavity 7.

[0046] In one embodiment, the lowest point of the blocking member 5 is lower than the lowest point of the smooth section 32, the lowest point of the nut 33 is lower than the lowest point of the blocking member 5, and the lowest point of the protective member 4 is lower than the lowest point of the blocking member 5.

[0047] In this embodiment, in order to ensure the blocking effect of the blocking member 5, during manufacturing, the lowest point of the blocking member 5 is limited to be lower than the lowest point of the smooth section 32. At this time, the blocking member 5 can be lower than most or completely lower than the blade 2.

[0048] In one embodiment, the cutting assembly further includes a reinforcing rib 6, one side of which is connected to the lower mounting surface 11, and the other side of which is connected to the blocking member 5. In this embodiment, the middle portion of the blocking member 5 is recessed towards the center of the cutter head 1, but not completely recessed to the center of the cutter head 1, so that the middle portion of the lower mounting surface 11 has a cavity. The reinforcing rib 6 is disposed in the cavity. The reinforcing rib 6 is annular and is connected to the sidewalls of multiple blocking members 5 simultaneously. One annular reinforcing rib 6 can simultaneously reinforce multiple blocking members 5.

[0049] In other embodiments, reinforcing ribs 6 of other shapes can be used to reinforce a single blocking member 5, or reinforcing ribs 6 of other shapes can be used to reinforce multiple blocking members 5 at the same time.

[0050] In addition, this utility model also provides a lawnmower, including the above-mentioned cutting components.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A cutting assembly, characterized in that, Includes a cutter head, blades, connectors, and at least two protective components; The blade disc is rotatable about a first rotation axis. The blade disc has a lower mounting surface that is close to the ground when the lawnmower is in operation. The blade is rotatably connected to the lower mounting surface about a second rotation axis via the connector. Both the protective member and the connecting member are disposed on the lower mounting surface. Along the circumference of the cutter head, at least one blade is disposed between two adjacent protective members. The protective member protrudes in a direction away from the lower mounting surface, and the lowest point of the protective member is lower than the lowest point of any part of the connecting member.

2. The cutting assembly according to claim 1, characterized in that, One side surface of the protective member is connected to the lower mounting surface, the cross-section of the protective member gradually decreases in the direction away from the lower mounting surface, and the outer wall of the protective member away from the cutter head is a smooth curved surface.

3. The cutting assembly according to claim 1, characterized in that, The protective component and the cutter head are integrally formed.

4. The cutting assembly according to claim 1, characterized in that, The protective component is detachably connected to the cutter head.

5. The cutting assembly according to claim 1, characterized in that, The cutter head is provided with threaded holes, and the blade is provided with through holes; The connector includes a threaded section, a smooth section, and a nut connected in sequence. The threaded section is threaded into the threaded hole, and the smooth section passes through the through hole so that the blade can rotate around the smooth section. The nut is located on the side of the blade away from the cutter head, and the side of the nut near the threaded section can stop the blade.

6. The cutting assembly according to claim 5, characterized in that, The length of the smooth section is greater than the thickness of the blade, so that the blade can rotate around the smooth section while also sliding between a first position and a second position along the axial direction of the smooth section. When the blade is in the first position, the blade is located at one end of the smooth section near the threaded section; When the blade is in the second position, the blade is located at the end of the smooth section away from the threaded section.

7. The cutting assembly according to claim 1, characterized in that, Multiple blades and multiple connectors are provided, and the multiple blades and multiple connectors correspond one-to-one.

8. The cutting assembly according to claim 7, characterized in that, It also includes a plurality of uniformly spaced blocking members surrounding the cutter head. The blocking members are disposed on the lower mounting surface and protrude in a direction away from the lower mounting surface. The two ends of the blocking members are respectively connected to two adjacent protective members. The lower mounting surface, the blocking members, and the protective members connected to the blocking members together define a receiving cavity. The plurality of receiving cavities are isolated from each other. The plurality of blades, the blocking members, and the plurality of connecting members correspond one-to-one. The connecting members and the blades are all disposed within the receiving cavities. The receiving cavity has a first opening and a second opening that are interconnected, and the blade can extend out of the receiving cavity from the second opening when rotating about the smooth section; the blocking member is used to prevent grass cut by one of the blades from entering the gap between the other blades and the lower mounting surface.

9. The cutting assembly according to claim 8, characterized in that, The middle part of the blocking member is recessed towards the center of the cutter head.

10. The cutting assembly according to claim 7, characterized in that, The lowest point of the blocking member is lower than the lowest point of the smooth section, the lowest point of the nut is lower than the lowest point of the blocking member, and the lowest point of the protective member is lower than the lowest point of the blocking member.

11. The cutting assembly according to claim 7, characterized in that, It also includes reinforcing ribs, one side of which is connected to the lower mounting surface, and the other side of which is connected to the blocking member.

12. A lawnmower, characterized in that, Includes the cutting component as described in any one of claims 1-11.

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