CN118042923A - Blade, cutterhead assembly and mower - Google Patents

Abstract

A blade (1, 1') comprising: the cutter blade comprises a cutter blade body (11), wherein first cutting edges (13, 13 ') extending along the length direction of the cutter blade body (11) are arranged on one side of the cutter blade body (11), the first cutting edges (13, 13 ') comprise concave arc sections (131), and first connecting parts (12) used for being connected with cutter heads (2, 2 ') are arranged at first ends (16) of the cutter blade body (11) along the length direction.

Description

Blade, cutterhead assembly and mower Technical Field

This document relates to, but is not limited to, a blade, cutterhead assembly, and mower.

Background

The mowing robot is a new variety developed on the basis of the traditional mower, can autonomously complete the work of trimming lawns, and does not need to be controlled and operated directly by people. The mowing robot generally has the functions of automatically mowing, cleaning grass scraps, automatically taking shelter from rain, automatically walking, automatically avoiding obstacles, automatically returning to charge, controlling a network and the like, and is suitable for trimming and maintaining lawns in places such as home courtyards, public greenhouses and the like.

The mowing robot has the advantages of being simple in operation, high in mowing efficiency and the like, can automatically complete mowing tasks, reduces labor cost and time cost, has the advantages of being safe, noiseless, high in intelligent degree and the like, and has become a main development direction of the mower industry.

Summary of The Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The utility model provides a blade, includes the blade main part, one side of blade main part is equipped with the edge that extends along the length direction of blade main part, first edge includes concave arc section, the first end along length direction of blade main part is equipped with the first connecting portion that is used for being connected with the blade disc.

A cutterhead assembly comprising: the cutter head and the blade, wherein the first connecting part of the blade is connected with the cutter head.

A mower comprises a mower body and the cutterhead assembly, wherein a cutterhead of the cutterhead assembly is connected with the mower body, and the cutterhead assembly is arranged to be rotatable.

Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

Brief description of the drawings

The accompanying drawings are included to provide a further understanding of the technology herein, and are incorporated in and constitute a part of this specification, illustrate technology herein and together with the description serve to explain, without limitation, the technology herein.

FIG. 1 is a schematic view of the structure of a blade of a mower in some situations;

FIG. 2 is a schematic perspective view of a blade according to an embodiment of the present application;

FIG. 3 is a schematic view of the front view of the blade shown in FIG. 2;

Fig. 4 is a schematic perspective view of a cutterhead assembly according to an embodiment of the present application;

Fig. 5 is a schematic front view of the cutterhead assembly shown in fig. 4;

Fig. 6 is a schematic perspective view of a cutterhead of the cutterhead assembly shown in fig. 4;

Fig. 7 is a schematic front view of the cutterhead shown in fig. 6;

fig. 8 is a schematic perspective view of a cutterhead assembly according to another embodiment of the present application;

Fig. 9 is a schematic front view of the cutterhead assembly shown in fig. 8.

The correspondence between the reference numerals and the component names in fig. 1 to 9 is:

1.1 ' -blade, 11 ' -blade body, 12' -first connecting portion, 13' -first blade, 131 ' -concave arc segment, 132 ' -straight segment, 14' -second blade, 141 ' -concave arc segment, 142 ' -straight segment, 15-cylindrical surface, 16-first end, 17-second end, 18-first side, 19-second side,

2. 2' -Cutter head, 21-disk body, 22-installation arm, 221-bending portion, 222-second connecting portion, 223-screw hole.

Detailed description of the preferred embodiments

Embodiments of the present application will be described below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

The embodiment of the application provides a blade 1, and the blade 1 can be applied to mowers or other products to realize mowing and other functions.

As shown in fig. 2 and 3, the blade 1 may include a blade body 11, and one side (i.e., a first side 18) of the blade body 11 may be provided with a first cutting edge 13, and the first cutting edge 13 may extend along a length direction of the blade body 11. The first blade 13 may be used for cutting, for example, to achieve mowing or the like. The blade body 11 also has a second side 19 opposite the first side 18.

The first blade 13 includes a concave arc segment 131, which is connected to any two points on the concave arc segment by a line segment, and the points of the line segment except the end points are all located in the empty space outside the blade body 11.

The first end 16 of the blade body 11 in the length direction may be provided with a first connection portion 12, the first connection portion 12 being configured to be connectable with the cutterhead 2 (as shown in fig. 4 and 5) to connect the blade 1 with the cutterhead 2 to form a cutterhead assembly. The blade body 11 also has a second end 17 opposite the first end 16, the first end 16 and the second end 17 being located at both ends of the first blade edge 13 in the length direction, respectively.

The concave arc segment 131 curves away from the second side 19 of the blade body 11 in a direction from the first end 16 toward the second end 17 of the blade body 11 (i.e., along the length of the blade body 11).

In some cases, as shown in fig. 1, the blade 11 'has a long strip shape (rectangular shape), and the two long sides of the blade 11' are sharpened to form a first blade 13 'and a second blade 14', and the first blade 13 'and the second blade 14' are both linear blades. In the embodiment of the present application, compared with the elongated blade 11' shown in fig. 1, when the lengths of the blade main bodies 11 are identical, the lengths of the concave arc segments 131 are longer than those of the linear first blade edge 13' and the linear second blade edge 14', so that the cutting range is wider; in addition, the concave arc segment 131 is arranged such that the width W2 of the second end 17 of the blade body 11 is greater than the width W1 of the first end 16 of the blade body 11, such that the weight of the second end 17 of the blade body 11 is greater, and the center of gravity of the blade body 11 moves toward the second end 17 of the blade body 11, such that the centrifugal force is greater and the mowing efficiency is higher when the blade 1 rotates.

In some exemplary embodiments, as shown in fig. 2 and 3, concave arc segment 131 may be a circular arc segment. It should be appreciated that the concave arc segment 131 may also be other shapes, such as an elliptical arc, etc.

In some exemplary embodiments, as shown in fig. 2 and 3, the first blade edge 13 may further include a straight line segment 132, one end of the straight line segment 132 being smoothly connected with one end of the concave arc segment 131, and the straight line segment 132 being disposed proximate the first end 16 of the blade body 11, and the concave arc segment 131 being disposed proximate the second end 17 of the blade body 11.

The first blade 13 includes a straight line segment 132 near the first end 16 of the blade body 11 and a concave arc segment 131 near the second end 17 of the blade body 11, and the straight line segment 132 is smoothly connected with the concave arc segment 131, so that the streamline coordination of the whole first blade 13 is smooth, and mowing is facilitated. In addition, the concave arc 131 disposed proximate the second end 17 of the blade body 11 helps to hook the grass contacted by the second end 17 of the blade body 11 toward the first end 16 of the blade body 11 for the first blade edge 13 to cut the grass.

It should be understood that the first cutting edge 13 may also be integrally a concave arc segment, excluding a straight segment, that may extend from the second end 17 of the blade body 11 to the first end 16 of the blade body 11.

In some exemplary embodiments, as shown in fig. 3, the dimension of the blade body 11 in the direction from the first end 16 toward the second end 17 is the length of the blade body 11, and the width direction of the blade body 11 is perpendicular to the length direction of the blade body 11. The length of the blade main body 11 is L, the radius of the concave arc segment 131 (i.e., the radius of the circle where the concave arc segment 131 is located) is R2, R2 is 1/3-1/2 of L, i.e., the value range of R2 is 1/3L-1/2L, so that the overall shape of the blade 1 is coordinated and smooth.

In some exemplary embodiments, the length L of the blade body 11 is 30mm-50mm, as may be: 35mm, 38mm, 40mm, 42mm, 45mm, 48mm, etc. The radius R2 of the concave arc segment 131 is 10mm-25mm, and may be: 12mm, 15mm, 18mm, 20mm, 23mm, etc. In one exemplary embodiment, the length L of the blade body 11 is about 39.5mm and the radius R2 of the concave arc segment 131 is about 15mm.

In some exemplary embodiments, the central angle corresponding to concave arc segment 131 may be set to be no greater than 90 °, such as 90 °, 87 °, 85 °, 83 °, 80 °, 77 °, 75 °, 73 °, 70 °, 67 °, 65 °, 63 °, 60 °, and so on.

Of course, the length L of the blade body 11, the relation between the radii R2, L and R2 of the concave arc segment 131, and the central angle corresponding to the concave arc segment 131 are not limited to the above ranges, and may be adjusted according to actual needs.

In some exemplary embodiments, as shown in fig. 2 and 3, the end surface of the second end 17 of the blade body 11 may be cylindrical. Wherein the cylindrical surface may be cylindrical surface 15. It should be understood that the cylinder may be other shapes, such as an elliptical cylinder, etc.

The end surface of the second end 17 of the blade body 11 is a cylindrical surface 15, which gives the blade body 11 an attractive appearance. In addition, as shown in fig. 4 and 5, when the plurality of blades 1 are mounted on the cutterhead 2, the cylindrical surfaces 15 of the plurality of blades 1 may be located on the same cylinder, that is, the diameters of the plurality of cylindrical surfaces 15 (the diameters of the cylinders in which the cylindrical surfaces 15 are located) are equal, the central axes of the plurality of cylindrical surfaces 15 (the central axes of the cylinders in which the cylindrical surfaces 15 are located) coincide, and the central axes of the plurality of cylindrical surfaces 15 may coincide with the central axis (the rotation axis) of the cutterhead 2, so that the diameters of the cylindrical surfaces 15 of the plurality of blades 1 are the mowing width of the cutterhead assembly. The larger the diameter of the cylindrical surface 15, the wider the mowing width. The larger the diameter of cylindrical surface 15 is, the better, but limited by the volume of the mower itself and the structural size of the chassis, as well as by the power of the motor, the battery capacity, etc., the diameter of cylindrical surface 15 is typically controlled within a certain range, such as 300mm. In some exemplary embodiments, the diameter of cylindrical surface 15 (2R 1) may be 150mm-300mm, such as the diameter of cylindrical surface 15 may be 170mm, 200mm, 240mm, 280mm, etc. It should be understood that the diameter of the cylindrical surface 15 is not limited to 150mm-300mm, and may be set to be less than 150mm or more than 300mm according to actual needs.

It should be appreciated that the end face of the second end 17 of the blade body 11 is not limited to a cylindrical surface 15, e.g., the end face of the second end 17 of the blade body 11 may be planar.

In some exemplary embodiments, as shown in fig. 2 and 3, the second side 19 of the blade body 11 is provided with a second cutting edge 14, and the second cutting edge 14 is symmetrically disposed with respect to the first cutting edge 13 relative to the central axis of the blade body 11 (as shown by the dotted line in fig. 3). As shown in fig. 2 and 3, the second blade 14 includes a concave arc section 141 and a straight line section 142, which are parallel to each other, as well as the first blade 13, and the concave arc section 131 and the concave arc section 141 are disposed such that the blade body 11 is T-shaped as a whole.

The arrangement of the second cutting edge 14 enables the blade 1 to cut bidirectionally, so that the blade 1 can be utilized to cut grass when the cutter head 2 rotates clockwise or anticlockwise, and the practicability of the cutter body is improved. The second blade 14 is symmetrically disposed with the first blade 13. So that the whole structure of the blade body 11 is symmetrical and beautiful, and the manufacturing is convenient.

As shown in fig. 2 and 3, the end surface of the second end 17 of the blade body 11 is a cylindrical surface 15, the first blade edge 13 includes a smooth connecting straight line segment 132 and a concave arc segment 131, and the second blade edge 14 includes a smooth connecting straight line segment 142 and a concave arc segment 141, so that the whole blade 1 has a streamline shape.

In some exemplary embodiments, as shown in fig. 2 and 3, the end surface of the first end 16 of the blade body 11 may be planar. Of course, the end face of the first end 16 of the blade body 11 is not limited to a plane, and may be provided in a cylindrical surface or other shape as desired.

In some exemplary embodiments, as shown in fig. 2 and 3, the blade body 11 is entirely flat.

In some exemplary embodiments, the thickness of the blade body 11 is 0.5mm-1mm, e.g., the thickness of the blade body 11 may be 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm.

The thickness of the blade main body 11 is 0.5mm-1mm, so that the blade main body 11 is not too thin, the blade main body 11 is easy to crack or collapse, and meanwhile, the problems of large material consumption, heavy weight, high cost, low mowing efficiency and the like of the blade main body 11 caused by too thick thickness of the blade main body 11 can be avoided.

It should be understood that the thickness of the blade body 11 is not limited to 0.5mm-1mm, and may be set to less than 0.5mm or more than 1mm according to actual needs.

In some exemplary embodiments, the blade body 11 is made of stainless steel, stainless iron or manganese steel, so that the blade body 11 has high strength, is not easy to corrode and rust, and has a long service life.

It should be understood that the material of the blade body 11 is not limited to the stainless steel, stainless iron or manganese steel described above, and other materials having high strength and less susceptible to corrosion and rust may be used.

In some exemplary embodiments, as shown in fig. 2 and 3, the first connection portion 12 of the blade body 11 is a screw hole so that the blade 1 can be connected to the cutterhead 2 by a screw.

In some exemplary embodiments, as shown in fig. 2 and 3, the blade 1 as a whole is symmetrically disposed about the central axis of the blade body 11 (as shown by the dotted line in fig. 3).

The embodiment of the application provides a cutter head assembly which can be used in a mower or other products. As shown in fig. 4 and 5, the cutterhead assembly may include a cutterhead 2 and the blade 1 provided in any of the embodiments described above, wherein the first connection portion 12 of the blade 1 is connected to the cutterhead 2.

In the cutter head assembly, the first connecting part 12 of the blade 1 can be connected with the cutter head 2 to realize that the blade 1 is mounted on the cutter head 2, and the cutter head 2 can rotate to drive the blade 1 to rotate to realize mowing and the like.

In some exemplary embodiments, the blades 1 are provided in a plurality (e.g., three to six) and are uniformly distributed along the circumferential direction of the cutterhead 2. As shown in fig. 4 and 5, three blades 1 are provided, three blades 1 are uniformly distributed along the circumferential direction of the cutterhead 2, and an included angle between two adjacent blades 1 is 120 °.

It should be understood that the number of blades 1 in the cutterhead assembly is not limited to three to six and can be adjusted as desired.

In some exemplary embodiments, the central axis of the cylindrical surface 15 of the second end 17 of the blade 1 is collinear with the central axis of the cutterhead 2, i.e., the axis of rotation of the cutterhead 2 about which the cutterhead 2 can rotate. As shown in fig. 5, the central axes of the cylindrical surfaces 15 at the second ends of the plurality of blades 1 are all collinear with the central axis of the cutterhead 2, and the diameters of the cylindrical surfaces 15 at the second ends of the plurality of blades 1 are equal, so that the cylindrical surfaces 15 of the plurality of blades 1 can be located on the same cylinder, the diameter of the cylinder is the diameter of the cutting circle of the whole cutterhead assembly, and the diameter of the cylinder is the mowing width of the cutterhead assembly.

In some exemplary embodiments, as shown in fig. 8 and 9, the cutterhead 2' includes a disc 21, which disc 21 may be substantially a disk, and the first ends 16 of the blades 1 may be connected to the edges of the disc 21.

In other exemplary embodiments, as shown in fig. 4-7, the cutterhead 2 includes a disc 21 and mounting arms 22, the mounting arms 22 extending radially outwardly from the disc 21, and the mounting arms 22 being connected to the blades 1. Wherein the disc 21 may be substantially a disc, one end of the mounting arm 22 is connected to an edge of the disc 21, and the other end extends outwardly in a radial direction of the disc 21, and the mounting arm 22 is connected to the first connecting portion 12 of the blade 1.

The disc 21 of the blade 1 can be connected with a rotating motor of the mower, so that the rotating motor drives the disc 21 to rotate, and then drives the blade 1 mounted to the mounting arm 22 to rotate, thereby mowing. The arrangement of the radially outwardly extending mounting arms 22 allows the diameter of the disc 21 to be reduced while maintaining the mowing width of the cutterhead assembly unchanged, which is advantageous for reducing the material consumption of the cutterhead 2, reducing the weight of the cutterhead 2, and reducing the cost of the cutterhead 2; in addition, the contact area between the cutter head 2 and the grassland during operation is reduced, the resistance to the cutter head 2 during operation is reduced, the cutter blade 1 is easy to cut off grass, the mowing efficiency is high, and the work noise is reduced.

In some exemplary embodiments, as shown in fig. 6 and 7, the mounting arm 22 of the cutterhead 2 is integrally formed with the disc body 21, so that the mounting arm 22 and the disc body 21 are in an integral structure, and the connection between the mounting arm 22 and the disc body 21 is firm, which is beneficial to enhancing the structural strength of the cutterhead 2, and further enhancing the connection strength between the cutterhead 2 and the cutting edge and the connection strength between the cutterhead 2 and the rotating motor. In addition, the mounting arm 22 and the tray 21 are integrally formed, which is beneficial to reducing the number of parts, simplifying assembly operation and improving assembly efficiency.

In some exemplary embodiments, as shown in fig. 4 and 7, the mounting arm 22 includes a bending portion 221 and a second connection portion 222, one end of the bending portion 221 is connected to the disk 21, the other end is connected to the second connection portion 222, the blade 1 is connected to the second connection portion 222 and located at one side of the second connection portion 222, and the bending portion 221 is bent toward the side of the disk 21 where the blade 1 is located.

As shown in fig. 4, one end of the curved portion 221 of the mounting arm 22 is connected to the edge of the tray 21, the other end is connected to the second connecting portion 222, and the cutterhead 2 is connected to the second connecting portion 222 and is located on one side (lower side in fig. 4) of the second connecting portion 222, that is, the cutterhead 2 is located on the upper side of the blade 1 so that the lower blade 1 mows. The curved portion 221 is curved toward the side where the blade 1 is located, that is, the curved portion 221 is curved toward the lower side, so that an avoidance space can be formed on the upper side of the curved portion 221, so that other parts of the mower, such as the protection cover on the upper side of the cutterhead 2, can be avoided when the cutterhead assembly is used for the mower.

In some exemplary embodiments, the blade 1 is screwed to the cutterhead 2. As shown in fig. 4 and 5, the first connecting portion 12 of the blade 1 may include a screw hole, a stud is disposed on the second connecting portion 222 of the mounting arm 22 of the cutterhead 2, a screw hole 223 is disposed in the stud, and a screw may pass through the screw hole of the blade 1 and be screwed with the screw hole 223, so as to realize screw connection of the blade 1 and the cutterhead 2.

The embodiment of the application provides a mower, which comprises a mower body and the cutterhead assembly provided by any embodiment, wherein the cutterhead 2 of the cutterhead assembly is connected with the mower body, and the cutterhead assembly is arranged to be rotatable.

In a mower, the machine body can comprise a rotating motor, and the rotating motor can be connected with a cutter head 2 of the cutter head assembly. When the mower starts to mow, the rotating motor drives the cutter head 2 to rotate at a high speed, so that the blade 1 is driven to be thrown away, and mowing is performed in the circumferential direction.

In some exemplary embodiments, the mower may be a mowing robot capable of autonomously completing mowing, which may enable automatic walking, automatic mowing, automatic obstacle avoidance, automatic return charging, etc., without manual direct control and operation.

The cutterhead 2 and the blade 1 of the embodiment of the application can be applied to other mowing equipment such as a mowing robot, besides a mowing machine.

In conclusion, when the blade designed by the embodiment of the application is used for mowing, the resistance encountered during mowing can be effectively reduced, grass is easier to cut off, and the mowing efficiency is improved; the design of the cutter head reduces the contact area with the lawn, further reduces the resistance during mowing, improves the mowing efficiency and simultaneously can effectively reduce noise.

In the description herein, it should be noted that the terms "upper," "lower," "one side," "another side," "one end," "another end," "side," "opposite," "four corners," "perimeter," "mouth" and "letter structure," and the like, indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are merely for convenience in describing the present disclosure and to simplify the description, and do not indicate or imply that the structures referred to have a particular orientation, are configured and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure.

In the description herein, it is noted that the term "plurality" refers to two or more.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, the terms "connected," "fixed," "mounted," and the like are to be construed broadly and, for example, "connected" may be either a fixed connection, a removable connection, or an integral connection; may be directly connected, may be indirectly connected through an intermediate medium, or may be in communication with the interior of two elements. The specific meaning of the terms herein above will be understood to those of ordinary skill in the art in a specific context.

While the embodiments disclosed herein are described above, the descriptions are presented only to facilitate an understanding of the embodiments disclosed herein and are not intended to limit the scope of the present disclosure. Any person skilled in the art may make any modifications and variations in form and detail of the implementations without departing from the spirit and scope of the disclosure, but the scope of the claims herein shall be defined by the appended claims.

Claims (17)

1. The utility model provides a blade, includes the blade main part, one side of blade main part is equipped with the edge that extends along the length direction of blade main part, first edge includes concave arc section, the first end along length direction of blade main part is equipped with the first connecting portion that is used for being connected with the blade disc.
2. The blade of claim 1, wherein the first edge further comprises a straight line segment that is smoothly connected to one end of the concave arc segment, the straight line segment being proximate a first end of the blade body, the concave arc segment being proximate a second end of the blade body opposite the first end.
3. The blade of claim 2, wherein the concave arc segment is a circular arc segment.
4. A blade according to claim 3, wherein the radius of the concave arc segment is 1/3-1/2 of the length of the blade body.
5. The blade of any one of claims 1 to 4, wherein an end face of a second end of the blade body opposite the first end is cylindrical or planar.
6. The blade according to any one of claims 1 to 4, wherein an end face of the second end of the blade body is a cylindrical surface having a diameter of 150mm-300mm.
7. The blade of any one of claims 1 to 4, wherein the blade body is further provided with a second edge, the second edge being symmetrically disposed with respect to the first edge about the central axis of the blade body.
8. The blade of any one of claims 1 to 4, wherein the blade body is T-shaped.
9. The blade of any one of claims 1 to 4, wherein the blade body has a length of 30mm-50mm and/or a thickness of 0.5mm-1mm.
10. A cutterhead assembly comprising: a cutterhead and the blade of any one of claims 1 to 9, the first connection of the blade being connected to the cutterhead.
11. The cutterhead assembly of claim 10, wherein a central axis of the cylindrical surface of the second end of the blade is collinear with a central axis of the cutterhead.
12. The cutterhead assembly of claim 11 wherein a plurality of blades are provided and are evenly distributed along a circumference of the cutterhead, the cylindrical surfaces of the second ends of the plurality of blades being of equal diameter.
13. The cutterhead assembly of claim 10 wherein the cutterhead includes a disc body and mounting arms extending radially outwardly from the disc body, the mounting arms being connected to the blades.
14. The cutterhead assembly of claim 13 wherein the mounting arm includes a curved portion and a second connecting portion, one end of the curved portion being connected to the disc and the other end being connected to the second connecting portion, the blade being connected to and located on a side of the second connecting portion, the curved portion being curved toward a side of the disc where the blade is located.
15. The cutterhead assembly of claim 13, wherein the mounting arms are integrally formed with the disc.
16. The cutterhead assembly of any of claims 10-15 wherein the blades are screwed with the cutterhead.
17. A mower comprising a body and the cutterhead assembly of any one of claims 10 to 16, a cutterhead of the cutterhead assembly being connected to the body and the cutterhead assembly being arranged to be rotatable.