CN219593065U

CN219593065U - Cutterhead assembly and mower

Info

Publication number: CN219593065U
Application number: CN202223168370.5U
Authority: CN
Inventors: 赵凤丽
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-08-29
Anticipated expiration: 2032-11-28

Abstract

The utility model provides a cutter head assembly and a mower, wherein the cutter head assembly comprises a cutter head, a fastening piece and a blade, the cutter head is provided with a mounting part, and the mounting part is provided with a lower surface and a connecting hole recessed upwards from the lower surface; the fastener is connected to the connecting hole and is provided with a limit mounting groove recessed along the radial direction; the blade is rotatably connected to the limit mounting groove around the first rotation axis, and the distance between the upper limit surface and the lower surface of the limit mounting groove is not less than 2.5mm along the axial direction parallel to the first rotation axis so as to prevent grass from being clamped between the blade and the lower surface. By adopting the scheme provided by the utility model, the gap between the cutter head and the blade can be effectively increased, so that foreign matters such as grass or mud are not easy to be stuffed between the cutter head and the blade, the possibility of blocking rotation of the blade is reduced, the blade can be smoothly thrown out when the cutter head rotates, and the blade assembly can be used for mowing stably and reliably.

Description

Cutterhead assembly and mower

Technical Field

The present utility model relates generally to the technical field of mowers, and more particularly to a cutterhead assembly and a mower.

Background

A lawnmower is a tool for cutting lawns. A related art mower includes a cutterhead assembly, a motor, and the like. The cutter head assembly is connected to the motor and driven to rotate by the motor. The cutter head assembly comprises a cutter head, a cutter shaft and blades, wherein the blades are rotatably connected to the edge part of the cutter head through the cutter shaft. When the mower works, the cutter head rotates under the drive of the motor, so that the cutter blade is thrown out to mow. The ubiquitous problems of lawnmowers are: after a period of time, grass or mud is easy to clamp between the blade and the cutter head of the mower, if the grass or mud is too much, the blade can be clamped, so that the blade can not be thrown out, and particularly, the problem is more remarkable when cutting a denser and longer lawn; at the same time, cleaning the clamped grass or mud is a very troublesome task.

Accordingly, there is a need to provide a cutterhead assembly and a mower that at least partially address the above-described problems.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above-described problems, a first aspect of the present utility model provides a cutterhead assembly comprising:

the cutter head is provided with a mounting part, and the mounting part is provided with a lower surface and a connecting hole recessed upwards from the lower surface;

a fastener coupled to the coupling hole, the fastener having a limit mounting groove recessed in a radial direction; and

a blade rotatably connected to the limit mount groove about a first axis of rotation,

along the axial direction parallel to the first rotation axis, the distance between the upper limit surface and the lower surface of the limit mounting groove is not less than 2.5mm so as to prevent grass from being clamped between the blade and the lower surface, wherein the upper limit surface of the limit mounting groove is configured as a groove wall of the limit mounting groove, which is close to the lower surface.

According to the cutter head assembly of the first aspect of the utility model, the blade is rotatably connected to the fastening piece around the first pivot axis and connected to the edge of the cutter head through the fastening piece, the blade is in limit fit in the limit mounting groove along the axial direction of the cutter head, and the distance between the upper limit surface and the lower surface of the limit mounting groove is not less than 2.5mm by limiting, so that the gap between the blade and the lower surface is increased, and foreign matters such as grass and grass scraps are allowed to pass between the blade and the cutter head more easily, and grass clamping between the blade and the cutter head is prevented. By adopting the scheme provided by the utility model, the gap between the cutter head and the blade can be effectively increased, so that foreign matters such as grass or mud are not easy to be stuffed between the cutter head and the blade, the possibility of blocking rotation of the blade is reduced, the blade can be smoothly thrown out when the cutter head rotates, and the blade assembly can be used for mowing stably and reliably.

Optionally, the fastener includes:

the insert nut is connected to the connecting hole and comprises a threaded hole; and

the bolt is connected with the threaded hole in a threaded way and comprises a bolt body and a bolt cover,

the blade is sleeved outside the bolt body, and the limit mounting groove is positioned between the insert nut and the bolt cover of the bolt.

Optionally, the insert nut comprises a first thread section and a first smooth section which are arranged along the length direction of the insert nut, the outer diameter of the first thread section is larger than that of the first smooth section, the first thread section is connected to the connecting hole,

the bolt cover of the bolt connected to the insert nut is abutted to the end face of the first smooth surface section, and the outer diameter of the bolt cover is larger than the outer diameter of the first smooth surface section,

the lower end face of the first thread section forms the upper limit surface, and the limit mounting groove is defined among the lower end face of the first thread section, the outer peripheral face of the first smooth section and the upper end face of the bolt cover.

Optionally, the bolt body of bolt includes along the second screw thread section and the second plain noodles section of self length direction forward arrangement, the second plain noodles section is than the second screw thread section is closer to the bolt lid, the second screw thread section connect in the screw hole, the external diameter of second screw thread section is less than the external diameter of second plain noodles section, the external diameter of second plain noodles section is less than the external diameter of inserts nut with the external diameter of bolt lid, the blade cover is located the outside of second plain noodles section.

Optionally, the upper end face of the second light face section abuts against the lower end face of the insert nut, the lower end face of the insert nut forms the upper limit surface, and the lower end face of the insert nut, the outer peripheral face of the second light face section and the upper end face of the bolt cover are defined as the limit mounting groove; and/or

The fastener further comprises a limiting sleeve, the limiting sleeve is sleeved on the second threaded section and located between the second smooth section and the insert nut, the outer diameter of the limiting sleeve is larger than that of the second smooth section, the lower end face of the limiting sleeve forms an upper limiting face, and a limiting mounting groove is defined between the lower end face of the limiting sleeve, the outer peripheral face of the second smooth section and the upper end face of the bolt cover.

Optionally, the cutterhead further has a first annular boss protruding downwards from the lower surface along the axial direction, and a lower end surface of the first annular boss does not exceed a lower end surface of the first thread section.

Optionally, the upper end face of the second light face section is abutted to the lower end face of the insert nut, the lower end face of the insert nut forms the upper limit surface, the lower end face of the insert nut, the outer peripheral face of the second light face section and the upper end face of the bolt cover are defined as the limit mounting groove,

the cutter head is also provided with a first annular boss protruding downwards from the lower surface along the axial direction, and the lower end surface of the first annular boss does not exceed the lower end surface of the insert nut.

Optionally, the fastener further includes a stop collar, the stop collar cover is located the outside of bolt and be located insert nut with between the bolt lid, the stop collar includes along the first spacing section and the second spacing section of self length direction forward setting, first spacing section is than the second spacing section is closer to insert nut, the external diameter of second spacing section is less than the external diameter of first spacing section with the external diameter of bolt lid, the lower terminal surface of first spacing section constitutes go up the spacing face, the lower terminal surface of first spacing section the outer peripheral face of second spacing section with be limited to between the up end of bolt lid spacing mounting groove.

A second aspect of the present utility model provides a mower comprising:

a body;

a drive assembly connected to the body; and

according to the cutterhead assembly, the cutterhead assembly is located at the lower portion of the body and connected to the driving assembly so as to rotate around the second rotation axis under the driving force provided by the driving assembly.

According to the mower disclosed by the utility model, by applying the cutter head assembly, the axial gap between the cutter head and the blades is increased, so that foreign matters such as grass or mud are not easy to be stuffed between the cutter head and the blades, the possibility of blocking rotation of the blades is reduced, the blade assembly can be ensured to be used stably and reliably, and the foreign matters between the cutter head and the blades are also convenient to clean.

Drawings

The following drawings of embodiments of the present utility model are included as part of the utility model. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

FIG. 1 is a side view of a mower according to a preferred embodiment of the present utility model;

FIG. 2 is a bottom view of the mower of FIG. 1;

fig. 3 is a partial schematic view of a cutterhead assembly according to a first preferred embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of the bolt of FIG. 3;

FIG. 5 is a schematic view of the insert nut of FIG. 3;

fig. 6 is a partial schematic view of a cutterhead assembly in accordance with a second preferred embodiment of the present utility model;

FIG. 7 is a schematic view of the nut of FIG. 6;

fig. 8 is a partial structural schematic view of a cutterhead assembly according to a third preferred embodiment of the present utility model;

fig. 9 is a partial schematic view of a cutterhead assembly in accordance with a fourth preferred embodiment of the present utility model;

fig. 10 is a partial schematic view of a cutterhead assembly in accordance with a fifth preferred embodiment of the present utility model; and

fig. 11 is a partial structural view of a cutterhead assembly according to a sixth preferred embodiment of the present utility model.

Reference numerals illustrate:

100: cutterhead assembly 110: cutterhead

111: the mounting portion 111a: lower surface of

111b: the connection hole 111c: second annular boss

121: insert nut 121a: first thread segment

121b: first light surface segment 121c: threaded hole

122: bolt 122a: bolt body

122b: bolt cover 123: spacing mounting groove

130: blade 160: body

170: drive assembly 210a: first annular boss

210: cutterhead 211: mounting part

211a: lower surface 221: insert nut

221c: screw hole 222: bolt

222a: bolt body 222a1: second thread segment

222a2: second light surface segment 222b: bolt cover

223: limit mounting groove 321: insert nut

325: limit sleeve 323: spacing mounting groove

510: cutterhead 510a: a first annular protrusion

511: mounting portion 511a: lower surface of

511c: second annular boss 626: limiting sleeve

626a: first spacing section 626b: second limiting section

623: limit mounting groove AX1: a first axis of rotation

AX2: the second rotation axis AX3: a third axis of rotation

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that embodiments of the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the utility model.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model, as the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like are used herein for illustrative purposes only and are not limiting.

Ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meaning, such as a particular order or the like. Also, for example, the term "first component" does not itself connote the presence of "second component" and the term "second component" does not itself connote the presence of "first component".

Hereinafter, specific embodiments of the present utility model will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present utility model and not limit the present utility model.

First embodiment:

the present utility model provides a cutterhead assembly for a lawn mower, such as a lawn mower robot. As shown in fig. 1-5, a cutterhead assembly 100 according to the present utility model includes a cutterhead 110, a fastener 120, and a blade 130.

The cutterhead 110 has a mounting portion 111. The mounting portion 111 has a lower surface 111a and a connection hole 111b recessed upward from the lower surface 111a in the axial direction of the cutterhead 110. The fastener 120 is coupled to the coupling hole 111b. The fastener 120 has a radially recessed limit mounting groove 123. The blade 130 is rotatably connected to the limit mount groove 123 about a first rotation axis AX1 parallel to the axial direction. The distance between the upper limit surface and the lower surface 111a of the limit mount groove 123 is not less than 2.5mm in the axial direction parallel to the first rotation axis AX1 to prevent the grass from being pinched between the blade 130 and the lower surface 111a. The first rotation axis AX1 is parallel to the axial direction of the cutterhead 110. Blade 130 may be provided with a through hole, and fastener 120 is at least partially positioned within the through hole. Wherein, the notch of spacing mounting groove 123 sets up radially outwards. The upper limit surface of the limit mounting groove 123 may be understood as a groove wall of the limit mounting groove 123 near the lower surface 111a in the axial direction of the cutterhead 110.

According to the cutterhead assembly 100 of the present utility model, by rotatably connecting the blade 130 to the fastening member 120 about the first pivot axis and connecting the blade 130 to the edge of the cutterhead 110 by the fastening member 120, the blade 130 is fitted into the limit mounting groove 123 in the axial direction of the cutterhead 110 in a limit manner, and by limiting the distance between the upper limit surface and the lower surface 111a of the limit mounting groove 123 to be not less than 2.5mm, the clearance between the blade 130 and the lower surface 111a is increased, thereby allowing foreign matters such as grass and grass clippings to pass between the blade 130 and the cutterhead 110 more easily, and further preventing the grass from being caught between the blade 130 and the cutterhead 110. By adopting the scheme of the utility model, the gap between the cutter head 110 and the blade 130 can be effectively increased, so that foreign matters such as grass or mud are not easy to be jammed between the cutter head 110 and the blade 130, the probability of occurrence of locked rotation of the blade 130 is reduced, the blade 130 can be smoothly thrown out when the cutter head 110 rotates, and the blade 130 assembly can be used for mowing stably and reliably.

Referring to fig. 3 to 5, for example, the fastener 120 includes an insert nut 121 and a bolt 122. The insert nut 121 is coupled to the coupling hole 111b. The insert nut 121 includes a threaded bore 121c. The bolt 122 is screwed into the screw hole 121c. The bolt 122 includes a bolt body 122a and a bolt cover 122b. The blade 130 is sleeved outside the bolt body 122 a. The limit mounting groove 123 is located between the insert nut 121 and the cap 122b of the bolt 122.

With continued reference to fig. 3-5, further, the insert nut 121 may include a first threaded section 121a and a first smooth section 121b disposed along its length. The outer diameter of the first thread segment 121a is greater than the outer diameter of the first plain segment 121b. The first thread segments 121a are connected to the connection holes 111b. A bolt cover 122b of a bolt 122 connected to the insert nut 121 abuts against an end face of the first light surface section 121b. And the outer diameter of the peg cap 122b is greater than the outer diameter of the first smooth surface segment 121b. A limit setting groove 123 is defined between the lower end surface of the first screw section 121a, the outer peripheral surface of the first light surface section 121b, and the upper end surface of the cap 122b. In other words, the blade 130 is sleeved outside the first light surface segment 121b, that is, the blade 130 is indirectly located outside the bolt body 122 a. And, the direction along the first rotation axis AX1 is limited by the lower end surface of the first screw section 121a and the upper end surface of the cap 122b. The lower end surface of the first thread segment 121a forms an upper limit surface of the limit mounting groove 123.

Referring again to fig. 3 to 5, for example, the mounting portion 111 further has an upper surface and a second annular boss 111c extending upward from the upper surface. The connection hole 111b extends up into the second annular boss 111c. This can increase the size of the connection hole 111b in the direction of the first rotation axis AX1, thereby contributing to an increase in the contact surface of the insert nut 121 with the mounting portion 111, making the connection structure of the insert nut 121 with the mounting portion 111 more stable.

In the embodiment shown in fig. 3, the insert nut 121 coupled to the coupling hole 111b protrudes from the lower surface 111a of the mounting portion 111. The distance between the blade 130 and the lower surface 111a of the mounting portion 111 is defined by the lower end surface of the insert nut 121, so that the assembly gap between the blade 130 and the lower surface 111a of the mounting portion 111 along the direction of the first rotation axis AX1 is increased, and the purpose of preventing the rotation blockage between the blade 130 and the mounting portion 111 due to the applique and soil is achieved.

In the embodiment shown in fig. 3, the connection hole 111b is configured as a two-stage stepped hole. The upper portion has a smaller bore diameter than the lower portion, and the lower portion has a bore for attachment of the insert nut 121.

Second embodiment:

referring to fig. 6 and 7, the same or similar parts as those of the first embodiment will not be described again, and the same reference numerals will be given to the same structures in this embodiment. The present embodiment is different from the first embodiment in that: the bolt body 222a of the bolt 222 includes a second thread section 222a1 and a second smooth section 222a2 arranged along its length. The second smooth surface segment 222a2 is closer to the cap 222b than the second threaded segment 222a 1. The second threaded section 222a1 is connected to the threaded bore 221c. The second thread segment 222a1 has an outer diameter that is smaller than the outer diameter of the second plain segment 222a2. The outer diameter of the second smooth surface section 222a2 is smaller than the outer diameter of the insert nut 321 and the outer diameter of the cap 222b. Blade 130 is disposed outside of second light surface segment 222a2.

Referring to fig. 6, further, an upper end surface of the second light surface section 222a2 abuts against a lower end surface of the insert nut 221. The lower end surface of the insert nut 221, the outer circumferential surface of the second light surface section 222a2, and the upper end surface of the cap 222b are defined as a limit mounting groove 223. The lower end surface of the insert nut 221 constitutes an upper limit surface of the limit mounting groove 123.

In the embodiment shown in fig. 6, the cutterhead 210 may also have a first annular boss 210a protruding axially downward from the lower surface 211 a. And the lower end surface of the first annular boss 210a does not exceed the lower end surface of the first threaded section 121 a. For example, the lower end surface of the first annular boss 210a is flush with the lower end surface of the first threaded section 121 a. The connection hole 211b extends to the lower end surface of the first annular boss 210a.

Third embodiment:

referring to fig. 8, the same or similar parts as those of the first and second embodiments will not be described again, and the same reference numerals will be given to the same structures in this embodiment. The present embodiment is different from the first embodiment and the second embodiment in that: fastener 120 may also include a stop collar 325. The limit sleeve 325 is sleeved on the second threaded section 222a1 and is located between the second smooth section 222a2 and the insert nut 321. The outer diameter of the stop collar 325 is greater than the outer diameter of the second smooth surface segment 222a2. A limit mount groove 323 is defined between the lower end surface of the limit collar 325, the outer peripheral surface of the second light surface section 222a2, and the upper end surface of the plug cover 222b. The lower end surface of the limit sleeve 325 forms an upper limit surface of the limit mounting groove 123.

Fourth embodiment:

referring to fig. 9, in the present embodiment, the cutter 210 of the second embodiment, and the insert nut 121 and the bolt 122 of the first embodiment are used in combination with the first and second embodiments. The cutterhead 210 also has a first annular boss 210a protruding axially downwardly from the lower surface 211 a. And the lower end surface of the first annular boss 210a does not exceed the lower end surface of the first threaded section 121 a.

Fifth embodiment:

referring to fig. 10, this embodiment is a modified embodiment of the second embodiment, and the same points as the second embodiment are not described in detail, except that: the mounting portion 511 of the cutterhead 510 has a second annular boss 511c protruding upward from the upper surface, but the cutterhead 510 does not have a first annular boss 210a protruding downward from the lower surface 511a of the mounting portion 511.

Sixth embodiment:

referring to fig. 11, the present embodiment is a modification of the first and third embodiments, in which the sixth embodiment employs the cutterhead 110 and the bolts 122 of the first embodiment and the insert nut 321 of the third embodiment. The difference is that: the fastener may also include a stop collar 626. The stop collar 626 is sleeved outside the bolt 122 and is positioned between the insert nut 321 and the bolt cover 122b. The stop collar 626 includes a first stop section 626a and a second stop section 626b disposed longitudinally along the length thereof. The first stop section 626a is closer to the insert nut 321 than the second stop section 626b. The outer diameter of the second spacing section 626b is smaller than the outer diameter of the first spacing section 626a and the outer diameter of the cap 122b. A limit mounting groove 623 is defined between the lower end surface of the first limit section 626a, the outer peripheral surface of the second limit section 626b, and the upper end surface of the cap 122b. The lower end surface of the first limiting section 626a constitutes an upper limiting surface of the limiting mounting groove 123.

Those skilled in the art will appreciate that the above embodiments can be arbitrarily combined and modified to obtain further embodiments in specific implementations, which are not shown here at all.

Referring to fig. 1-5, in conjunction with fig. 6-11, the present utility model also provides a mower including a body 160, a drive assembly 170, and a cutterhead assembly 100 according to any of the above embodiments. The drive assembly 170 is connected to the body 160. The cutterhead assembly 100 is located at a lower portion of the body 160 and is connected to the driving assembly 170 to rotate about the second rotation axis AX2 by a driving force provided by the driving assembly 170.

According to the mower disclosed by the utility model, due to the fact that the axial gap between the cutter disc and the blade is increased, foreign matters such as grass or mud are not easy to be stuffed between the cutter disc and the blade, so that the probability of blocking rotation of the blade is reduced, the blade assembly can be ensured to be used stably and reliably, and the foreign matters between the cutter disc and the blade are also convenient to clean.

For example, the drive assembly 170 may include a motor having an output shaft that rotates about the third axis of rotation AX3. The third rotation axis AX3 is parallel to the vertical direction. The second axis of rotation AX2 of the cutterhead 110 is inclined to the third axis of rotation AX3. As can be seen from fig. 1, the portion of the cutterhead 110 near the mower head is lower than the portion of the cutterhead 110 far away from the mower head, so that the cutterhead 110 is easier to cut deeper and denser grass, and meanwhile, in the mowing process, grass or mud is further reduced to a certain extent to enter a gap between the cutterhead 110 and the blade 130, so that the probability of blocking rotation of the blade 130 is reduced, and the mower can stably run for a longer time.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed.

Claims

1. A cutterhead assembly, the cutterhead assembly comprising:

2. The cutterhead assembly of claim 1, wherein,

the fastener includes:

3. The cutterhead assembly of claim 2 wherein the insert nut includes a first threaded section and a first smooth section disposed along a length thereof, the first threaded section having an outer diameter greater than an outer diameter of the first smooth section, the first threaded section being connected to the connecting bore,

4. The cutterhead assembly of claim 2 wherein the bolt body includes a second threaded section and a second smooth section disposed along a longitudinal direction thereof, the second smooth section being closer to the bolt cover than the second threaded section, the second threaded section being connected to the threaded bore, an outer diameter of the second threaded section being smaller than an outer diameter of the second smooth section, an outer diameter of the second smooth section being smaller than an outer diameter of the insert nut and an outer diameter of the bolt cover, the insert being sleeved outside the second smooth section.

5. The cutterhead assembly of claim 4, wherein,

the upper end face of the second smooth surface section is abutted to the lower end face of the insert nut, the lower end face of the insert nut forms the upper limit surface, and the lower end face of the insert nut, the outer peripheral face of the second smooth surface section and the upper end face of the bolt cover are limited to be the limit mounting groove; and/or

6. The cutterhead assembly of claim 3 wherein the cutterhead further has a first annular boss projecting downwardly from the lower surface in the axial direction and a lower end face of the first annular boss does not extend beyond a lower end face of the first thread segments.

7. The cutterhead assembly of claim 4, wherein,

the upper end face of the second smooth surface section is abutted to the lower end face of the insert nut, the lower end face of the insert nut forms the upper limit surface, the lower end face of the insert nut, the outer peripheral face of the second smooth surface section and the upper end face of the bolt cover are limited to be the limit mounting groove,

8. The cutterhead assembly of claim 2, wherein the fastener further comprises a stop collar, the stop collar is sleeved outside the bolt and located between the insert nut and the bolt cover, the stop collar comprises a first stop section and a second stop section which are arranged along the length direction of the stop collar, the first stop section is closer to the insert nut than the second stop section, the outer diameter of the second stop section is smaller than the outer diameter of the first stop section and the outer diameter of the bolt cover, the lower end face of the first stop section forms the upper stop face, and a limit mounting groove is defined between the lower end face of the first stop section, the outer circumferential face of the second stop section and the upper end face of the bolt cover.

9. A mower, the mower comprising:

a body;

a drive assembly connected to the body; and

the cutterhead assembly of any one of claims 1 to 8, being located in a lower portion of the body and connected to the drive assembly for rotation about a second axis of rotation under a drive force provided by the drive assembly.