阅读说明：本技术 切割组件及割草机 (Cutting assembly and lawn mower ) 是由 焦石平 查霞红 于 2019-08-20 设计创作，主要内容包括：本发明涉及一种切割组件及割草机,该切割组件安装在割草机上以执行切割工作,所述切割组件包括刀盘和设置在所述刀盘不同高度上的至少两个切割元件组,每个所述切割元件组包括至少一个切割元件；所述刀盘响应割草机的驱动发生自转并带动所述切割元件旋转,以在所述刀盘的不同高度上形成至少两个切割轨迹。该切割组件及割草机通过在刀盘的不同高度上设置至少两个切割元件组,使该切割组件在电动工具驱动下形成至少两个切割轨迹,且切割轨迹分布在刀盘的不同高度上,以对长草进行多次切割,从而使长草切割得更碎。(The invention relates to a cutting assembly and a mower, wherein the cutting assembly is arranged on the mower to perform cutting work, the cutting assembly comprises a cutter disc and at least two cutting element groups arranged on the cutter disc at different heights, and each cutting element group comprises at least one cutting element; the cutter head rotates in response to the driving of the mower and drives the cutting element to rotate so as to form at least two cutting tracks at different heights of the cutter head. According to the cutting assembly and the mower, the at least two cutting element groups are arranged at different heights of the cutter head, so that the cutting assembly forms at least two cutting tracks under the driving of the electric tool, and the cutting tracks are distributed at different heights of the cutter head so as to cut long grass for multiple times, and the long grass is cut more finely.)

1. A cutting assembly for mounting on a lawn mower for performing cutting operations, said cutting assembly comprising an impeller and at least two groups of cutting elements disposed at different heights on said impeller, each of said groups of cutting elements comprising at least one cutting element; the cutter head rotates in response to the driving of the mower and drives the cutting element to rotate so as to form at least two cutting tracks at different heights of the cutter head.

2. The cutting assembly of claim 1, wherein at least two of said cutting elements are disposed above or below, or both above and below, the impeller in a layer-by-layer manner in a height direction of the impeller.

3. The cutting assembly of claim 2, wherein the cutting track is circular, and in two adjacent cutting element groups, the diameter of the cutting track positioned at the upper part is larger than or equal to the diameter of the cutting track positioned at the lower part.

4. The cutting assembly of claim 3, wherein the center of each of said cutting tracks is located on a vertical central axis of said impeller.

5. The cutting assembly of claim 4, wherein the cutting path is circular and the cutting paths of the cutting element sets are tapered from above to below and below.

6. The cutting assembly of claim 5, wherein the cutting trajectories of all of the sets of cutting elements have the same tangent line, the tangent line having an angle with the vertical central axis.

7. The cutting assembly of claim 6, wherein an angle between the tangent line and the vertical central axis is 0 or greater and 90 degrees or less.

8. The cutting assembly of claim 1, wherein the spacing between adjacent sets of cutting elements in the height direction of the impeller is 10-20 mm.

9. The cutting assembly of claim 2, wherein all of the cutting elements of at least one of the cutting element sets are mounted on the upper or lower surface by a connector.

10. The cutting assembly of claim 2, wherein said cutter disc further includes a plurality of mounting portions for securing said cutting elements, said mounting portions being disposed from said upper surface toward said upper side and/or said mounting portions being disposed from said lower surface toward said lower side.

11. The cutting assembly of claim 10, wherein the cutting element is secured to the mounting portion by a connector with a clearance therebetween.

12. The cutting assembly of claim 1, wherein the cutting element is a wire.

13. The cutting assembly of claim 1, wherein the cutting element is a blade comprising a base and a blade edge disposed at least partially about a periphery of the base.

14. The cutting assembly of claim 13, wherein the blade is a straight blade having cutting edges on both sides.

15. The cutting assembly of claim 13, wherein a plurality of said blades are provided in each of said groups of cutting elements, said blades being disposed uniformly about a vertical central axis of said impeller.

16. A lawn mower, comprising:

a housing;

the moving device drives the mower to move on the lawn;

the cutting assembly of any one of claims 1 to 15, housed within the housing, to perform a cutting operation;

and the number of the first and second groups,

and the driving device is connected with the cutting assembly and drives the cutting assembly to operate.

Technical Field

The invention relates to a cutting assembly and a mower, and belongs to garden tools.

Background

A conventional power mower generally employs a single-layer cutting blade, the middle portion of the cutting blade is a connecting portion, and is connected to a cutter head through a connecting member, and an output shaft of the power mower drives the cutter head to rotate for cutting a lawn. However, when the blades cut long grass, the cut grass is not broken, and the straw left on the grass is too long.

Disclosure of Invention

The invention aims to provide a cutting assembly and a mower, which can cut long grass for multiple times to make the long grass cut more broken.

In order to achieve the purpose, the invention provides the following technical scheme: a cutting assembly for mounting on a lawn mower for performing cutting operations, said cutting assembly comprising a cutter disc and at least two groups of cutting elements disposed at different heights on said cutter disc, each said group of cutting elements comprising at least one cutting element; the cutter head rotates in response to the driving of the mower and drives the cutting element to rotate so as to form at least two cutting tracks at different heights of the cutter head.

Further, at least two of the cutting elements are arranged above or below the cutter disc, or above and below, layer by layer in the height direction of the cutter disc.

Further, the cutting track is circular, and in two adjacent cutting element groups, the diameter of the cutting track positioned above is greater than or equal to the diameter of the cutting track positioned below.

Furthermore, the circle center of each cutting track is located on the vertical central shaft of the cutter head.

Further, the cutting track is circular, and the cutting track of the cutting element group becomes gradually smaller from the upper part to the lower part below.

Further, the cutting trajectories of all the cutting element groups have the same tangent line, and the tangent line has an angle with the vertical central axis.

Further, the angle between the tangent and the vertical central axis is greater than or equal to 0 and smaller than 90 degrees.

Furthermore, in the height direction of the cutter head, the interval between the adjacent cutting element groups is 10-20 mm.

Further, all cutting elements of at least one of the cutting element sets are mounted on the upper or lower surface by a connector.

Further, still be equipped with a plurality of mountings that are used for fixing cutting element on the blade disc, the mounting part is followed the upper surface is faced the top sets up, and/or, the mounting part is followed the lower surface is faced the below sets up.

Further, the cutting element is fixed on the mounting part through a connecting piece, and a gap is reserved between the cutting element and the mounting part.

Further, the cutting element is a wire.

Further, the cutting element is a blade comprising a base and a cutting edge disposed at least partially at a periphery of the base.

Further, the blade is a straight blade, and cutting edges are arranged on two sides of the blade.

Furthermore, a plurality of blades are arranged in each cutting element group, and the blades are uniformly arranged along the circumferential direction of the vertical central shaft of the cutter disc.

The invention also relates to a mower comprising:

a housing;

the moving device drives the mower to move on the lawn;

the cutting assembly is accommodated in the shell and executes cutting work;

and the number of the first and second groups,

and the driving device is connected with the cutting assembly and drives the cutting assembly to operate.

Compared with the prior art, the invention has the beneficial effects that: according to the cutting assembly and the mower, the at least two cutting element groups are arranged at different heights of the cutter disc, so that the cutting assembly forms at least two cutting tracks under the driving of the mower, and the cutting tracks are distributed at different heights of the cutter disc to cut long grass for multiple times, so that the long grass is cut more finely.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIGS. 1 and 2 are schematic views of a cutting assembly according to an embodiment of the present invention, illustrating the cutting assembly in different orientations;

fig. 3 is a schematic structural diagram of a cutting element in the cutting assembly according to an embodiment of the invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

It should be noted that: the terms "upper", "lower", "left", "right", "inner" and "outer" of the present invention are used for describing the present invention with reference to the drawings, and are not intended to be limiting terms.

The cutting element group of the invention is mounted on a mower and comprises a cutter disc and at least two cutting element groups arranged on the cutter disc at different heights, wherein each cutting element group comprises at least one cutting element. The electric tool drives the cutter disc to rotate and drive the cutting element to rotate so as to form at least two cutting tracks at different heights of the cutter disc.

In the invention, the cutter head is driven by an electric tool to rotate and drive the cutting element arranged on the cutter head to operate, and is a disc-shaped piece. The shape of the cutterhead is preferably circular. The circular cutter head rotates stably due to the uniform mass distribution. Indeed, the shape of the triangle or the square can be set according to actual needs. The cutter head comprises an upper surface close to the electric tool and a lower surface opposite to the upper surface, one side of the upper surface is defined as an upper side, one side of the lower surface is defined as a lower side, and the cutting element groups are arranged layer by layer from the upper side to the lower side in the height direction of the cutter head, or can be arranged on the same side surface of the cutter head (arranged above or below at the same time). In general, the cutting elements rotate with the cutter disc, and the cutting track is circular, so that multiple cutting operations can be performed in the process of cutting long grass, and the diameter of the cutting track positioned above the cutter disc in the height direction of the cutter disc is larger than or equal to that of the cutting track positioned below the cutter disc. Preferably, the cutting tracks are gradually reduced from top to bottom, the cutting tracks of all the cutting element groups have the same tangent line, and the angle between the tangent line and the vertical central shaft of the cutter head is 0-90 degrees, so that the long grass is gradually cut from top to bottom and is cut into pieces.

In the invention, in order to ensure that the whole structure of the assembly is simple and the manufacturing cost is lower, the circle center of each cutting track is preferably positioned on the vertical central shaft of the cutter head; indeed, the offset arrangement is also possible without regard to manufacturing costs. In addition, under the condition that long grass can be cut to be sufficiently broken, in order to avoid damage caused by collision of adjacent cutting element groups due to too short distance, the interval between the adjacent cutting element groups in the height direction of the cutter head is preferably 10-20 mm.

In general, at least one cutting element group is arranged on the upper or lower surface of the cutter head, and the cutting elements of the cutting element group are fixed on the cutter head by a connecting piece. In the present invention, the cutter head is further provided with a plurality of mounting portions for fixing the cutting elements, which are disposed between adjacent cutting element groups. The mounting portion is disposed upwardly from the upper surface and/or the mounting portion is disposed downwardly from the lower surface, specifically selected based on the position of the cutting element. The mounting portion may be independently attached to the cutter head or may be integrally formed with the cutter head. The cutting element is fixed on the mounting part through a connecting piece, preferably, the connecting piece is a screw, the mounting part is provided with a threaded hole matched and connected with the screw, and a gap is formed between the cutting element and the mounting part; indeed, other connectors may be used to secure the cutting element without regard to cost. By arranging the gap between the cutting element and the mounting part, when the cutter disc is driven by the electric tool to rotate, the cutting element rotates in the gap, so that the cutting effect can be improved.

In the present invention, the structure of the cutting element is the prior art in the industry, and specifically, the cutting element can be a blade, a metal wire or other metal or non-metal element, preferably, the cutting element is a blade which comprises a base and a blade edge, and the blade edge is at least partially arranged on the periphery of the base. Each blade is independently of the other regular or irregular in shape, which may be circular, rectangular or other shape, preferably the blade is a straight blade, with cutting edges provided on both sides of the blade.

In the invention, the number of the cutting elements on a single cutting element group is preferably three, and the three cutting elements are uniformly arranged at equal intervals along the circumferential direction of the vertical central shaft of the cutter disc, so that the electric tool can achieve balance between cutting capacity and load, and higher cutting efficiency is realized. Indeed, the number of cutting elements is not limited thereto and may be set according to practical needs.

In the invention, preferably, three cutting element groups are provided, and the three cutting element groups are sequentially distributed at the upper, middle and lower positions of the cutter head, namely, a traditional cutting element group arranged on the plane of the cutter head is reserved, and one cutting element group is respectively added above and below the cutter head. Indeed, the number of cutting element sets is not limited thereto, and may be set according to actual needs.

The cutting assembly of the present invention is preferably intended for mounting on a lawn mower and, indeed, may be used on other power tools. The mower (not shown) mainly comprises a housing for accommodating and protecting, a moving device for moving, the cutting assembly for cutting, and a driving device connected with the cutting assembly and driving the cutting assembly to operate. The driving device is arranged in the shell, and a motor and an output shaft which is respectively connected with the motor and the cutter head are arranged in the driving device and used for driving the cutter head to rotate. The cutter head rotates to drive the cutting element to rotate so as to trim the lawn. Other configurations of the mower are well known in the art and therefore are not described in detail herein.

Referring to fig. 1 and 2, referring to fig. 1, a is upward and an opposite is downward. The cutting assembly shown in one embodiment of the present invention comprises a cutter disc 1 and three cutting element groups 2 arranged at different heights on the cutter disc 1, wherein the three cutting element groups 2 are a first cutting element group 21 arranged above the cutter disc 1, a second cutting element group 22 arranged on the plane of the cutter disc 1 and a third cutting element group 23 arranged below the cutter disc 1. Three cutting elements 20 are arranged in each cutting element group 2, and the three cutting elements 20 are uniformly arranged at equal intervals along the circumferential direction of the vertical central shaft of the cutter head 1, that is, the first cutting element group 21, the second cutting element group 22 and the third cutting element group 23 are concentric circles with different diameters, and the center of the circle is located on the vertical central shaft of the cutter head 1. The cutting elements 20 are arranged uniformly in the circumferential direction, so that the power tool can achieve balance between cutting capacity and load, and higher cutting efficiency is achieved. Indeed, in other embodiments, the number of cutting element groups 2 and cutting elements 20 may be selected according to the actual circumstances.

The cutter head 1 is provided with a mating surface 10 for mating with an output shaft (not shown) of a motor, an upper surface 11 close to the output shaft and a lower surface 12 opposite to the upper surface 11, the mating surface 10 is provided with a plurality of mating holes (not shown), and in the embodiment, screws are arranged in the mating holes to fix the cutter head 1 on the output shaft. Indeed, in other embodiments, a bolt, a rivet, or other mating structures may be used to connect the cutter head 1 with the output shaft. The motor drives the cutter head 1 to rotate by an output shaft and drives the cutting elements 20 to rotate, so that each cutting element group 2 forms cutting tracks at different heights of the cutter head 1, and the cutting tracks formed by each cutting element group 2 are circular as the cutting elements 20 rotate along with the cutter head 1.

In this embodiment, the three cutting element groups 2 are arranged layer by layer from the top to the bottom in the height direction of the cutter head 1, and are distributed in a stepped tower shape, that is, the diameter of the cutting track on the top is larger than the diameter of the cutting track on the bottom. Because the diameter of the upper cutting track is larger, the first cutting element group 21 positioned above contacts with the grass firstly to cut the upper end of the grass in the cutting process; the second cutting element group 22, situated in the plane of the cutterhead 1, then cuts the grass; the lower third cutting element group 23 cuts the grass close to the ground, thus ensuring that the long grass is cut more finely. In addition, under the condition that long grass can be cut sufficiently, in order to avoid damage caused by collision of adjacent cutting element groups 2 due to too short distance, the interval between the adjacent cutting element groups 2 in the height direction of the cutter head 1 is 10-20 mm.

In this embodiment, the cutter head 1 is further provided with mounting portions 13 for fixing the cutting elements 20, which are respectively used for fixing the cutting elements 20 in the first cutting element group 21 and the third cutting element group 23, specifically, the mounting portions 13 for mounting the cutting elements 20 in the first cutting element group 21 are arranged to protrude upward from the upper surface 11, the second cutting element group 21 is arranged on the lower surface 12 of the cutter head 1, and the mounting portions 13 for mounting the cutting elements 20 in the third cutting element group 23 are arranged to protrude downward from the lower surface 12. In this embodiment, the mounting portion 13 is integrally formed with the cutter head 1, but may be independently mounted in other embodiments. Mounting holes (not shown) are formed in the mounting portion 13, and in the present embodiment, the cutting element 20 is fixed to the mounting portion 13 by a connector 200, and the connector 200 is a screw; indeed, in other embodiments, a bolt, a rivet, or other mating structures may be used to connect the cutter head 1 with the output shaft. And a gap is formed between the cutting element 20 and the mounting part 13, when the cutter disc 1 is driven by the electric tool to rotate, the cutting element 20 rotates in the gap, so that the cutting effect can be increased.

Referring to fig. 3, the cutting element 20 of the present embodiment is a rectangular straight blade, and includes a base 201 and a blade 202, wherein the blade 202 is disposed on the outer periphery of the base 201; indeed, in other embodiments, the shape and structure of the cutting element 20 may be selected according to the actual situation, and may be, for example, a regular or irregular shape such as a circle, a triangle, etc., or a metal or non-metal element such as a metal wire.

In summary, the following steps: according to the cutting assembly and the mower, the at least two cutting element groups are arranged at different heights of the cutter disc, so that the cutting assembly forms at least two cutting tracks under the driving of the mower, and the cutting tracks are distributed at different heights of the cutter disc to cut long grass for multiple times, so that the long grass is cut more finely.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.