CN112243677A

CN112243677A - Rotary disc device of lawn mower

Info

Publication number: CN112243677A
Application number: CN202010781851.XA
Authority: CN
Inventors: 张云瑄
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-01-22

Abstract

The invention provides a rotary disc device of a mower, which comprises a cutter disc, a plurality of limiting components, a plurality of elastic weeding rods and a plurality of fixing pieces, wherein the limiting components are arranged on the cutter disc at intervals in an annular mode, the elastic weeding rods are respectively limited on the limiting components, and the fixing pieces are used for fixing the limiting components on the cutter disc respectively. Each weeding rod can swing relative to the corresponding limiting component by taking the axial direction of the cutter head as a rotating shaft. The weeding rods can break up the tissue surface of weeds, so that the cutting surface is uneven and the growth speed of the weeds is reduced, and each weeding rod can rotate relative to the cutter head after being impacted, thereby relieving the impact force and avoiding the hard impact condition.

Description

Rotary disc device of lawn mower

Technical Field

The present invention relates to cutting assemblies, and more particularly to a turntable device for a lawn mower.

Background

The conventional handheld mower can cut weeds by driving the rotating disc provided with the blade to rotate so as to achieve the weeding effect, but the blade has the problems of being too sharp and rigid, and being easy to regenerate quickly, and the latter is easy to cause the temporary heavy defect of the blade when the blade hits stones and the like, thereby reducing the service life. In addition, the blade also has a safety problem that it is easy to injure people. The blade or saw blade has the disadvantages mentioned above, and most of the current ox tendon ropes are used for weeding by beating, so that the tangent plane on the weeds is uneven to reduce the regeneration speed, and on the other hand, when the ox tendon ropes hit obstacles, the rope-shaped structure can have a space for buffering the balance force, so as to avoid the damage caused by hard collision, and the ox tendon ropes are much safer compared with the blade.

However, the tendon rope is often fixed on the turntable by winding or clamping, the former is not easy to be assembled and disassembled, the latter has a problem of poor fixing ability, and the tendon rope has poor strength and high loss speed, which results in a problem of short service life and frequent replacement. Therefore, it is necessary to provide a further solution to the above problems.

Disclosure of Invention

The present invention is directed to a rotary disc device of a lawn mower to overcome the disadvantages of the prior art.

To achieve the above object, the present invention provides a rotary disc device of a lawn mower, comprising:

a cutter head;

the plurality of limiting components are arranged on the cutter head at intervals in an annular manner;

a plurality of elastic weeding rods which are respectively limited on the limiting components, and each weeding rod can swing relative to the corresponding limiting component by taking the axial direction of the cutter head as a rotating shaft; and

a plurality of fixing members for fixing the limiting components on the cutter head respectively.

As an improvement of the turntable device of the mower, each limiting component comprises two positioning sheets which are overlapped with each other along the axial direction of the cutter head and are sleeved with a corresponding weeding rod, each positioning sheet defines an opening through which the weeding rod can pass, and when the positioning sheets are overlapped, the openings of the positioning sheets face to the opposite direction, so that the opening of each positioning sheet is shielded by the other positioning sheet, and the weeding rod is rotatably limited on the positioning sheets.

As an improvement of the rotary disc device of the mower, each positioning sheet of each limiting component is provided with a ring plate part surrounding and defining a fixing hole and a hook part connected with the ring plate part and sleeved by the corresponding weeding rod, the ring plate part and the hook part are matched to define the opening, and each fixing piece penetrates through the fixing holes of the corresponding limiting component along the axial direction of the cutter head.

As an improvement of the rotary disc device of the grass cutter of the invention, the hook part of each positioning sheet defines an extending groove communicated with the corresponding opening, each weeding rod comprises a ring part which passes through the extending grooves of the corresponding limiting component and is sleeved on the hook part, and a rod body part which is connected with the ring part and extends outwards.

The improved rotary disc device of the mower comprises a surrounding wall part surrounding an opening extending along the axial direction, a connecting part located in the opening and connected with the surrounding wall part along the radial direction, and two disc body parts connected with the outer peripheral surface of the surrounding wall part and spaced along the axial direction, wherein the disc body parts and the surrounding wall part are matched to define an annular groove for placing one end of the limiting component.

As an improvement of the rotary disc device of the mower, each fixing piece comprises a bolt penetrating through the disc body parts of the cutter disc and the fixing holes of the corresponding limiting component, and a nut locked at the tail end of the bolt.

As an improvement of the rotary disc device of the grass cutter of the present invention, the weeding rods are made of metal.

Compared with the prior art, the invention has the beneficial effects that: the weeding rods can break up the tissue surface of weeds, so that the tangent plane is uneven to slow down the growth speed of the weeds, and each weeding rod can rotate relative to the cutter head after being impacted. Thereby relieving the impact force and avoiding the situation of hard-to-hard collision, and the hard and elastic rod-shaped bodies of the weeding rods are wear-resistant and can prolong the service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an exploded perspective view of a turntable device of a lawn mower, in which only a limiting component, a weed removing rod and a fixing component are shown in FIG. 1;

FIG. 2 is a cross-sectional view of a turntable assembly of the mower of FIG. 1;

FIG. 3 is a top view of the turntable assembly of the mower of FIG. 1;

fig. 4 is a perspective view of the turntable device of the present invention applied to a lawn mower.

Detailed Description

The present invention is described in detail below with reference to various embodiments, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make modifications and substitutions on the functions, methods, or structures of these embodiments without departing from the scope of the present invention.

As shown in FIGS. 1 to 3, the turntable device 1 of the lawn mower of the present invention comprises: the lawn mower comprises a cutter head 1, six limiting components 12 (only one of which is shown in fig. 1) which are arranged on the cutter head 11 in an annular mode at equal angular intervals, six weed removing rods 13 (only one of which is shown in fig. I) which are respectively limited on the limiting components 12, and six fixing pieces 14 (only one of which is shown in fig. I) which respectively fix the limiting components 12 on the cutter head 11. The axial direction a, the radial direction B, and the circumferential direction C mentioned in the present embodiment are based on the cutter head 11. In addition, the number of the limiting components 12, the weeding rods 13 and the fixing components 14 can be other than six according to the requirement.

The cutter head 11 includes a surrounding wall portion 112 surrounding an opening 111 extending in the axial direction a, a connecting portion 113 located in the opening 111 and connecting the surrounding wall portion 112 of the surrounding 50 in the radial direction B, and two body portions 114 connected to the outer peripheral surface of the surrounding wall portion 112 and spaced from each other in the axial direction a. The dish portions 114 cooperate with the surrounding wall portion 112 to define an annular groove 115 extending in the circumferential direction C. Each stop assembly 12 comprises two locating tabs 121 superimposed on each other in the axial direction a but opposite to each other in the radial direction B. Each positioning piece 121 has a ring plate portion 122 disposed in the ring groove 115, and a hook portion 123 connected to the ring plate portion 122 and extending outside the ring groove 115 along the radial direction B. The ring plate portion 122 surrounds and defines a fixing hole 124 extending in the axial direction a. The hook 123 is bent to define an extending groove 125 extending along the radial direction B. The ring plate 122 and the hook 123 cooperate to define an opening 126 that communicates with the extending groove 125 and extends along the circumferential direction C. Each of the weeding rods 13 is a steel strip with elasticity, but it can also be an iron strip or other metal strip, and the invention is not limited thereto. The weed removing stick 13 comprises a ring portion 131 passing through the extending grooves 125 corresponding to the position limiting component 12 and being sleeved on the hook portions 123, and a stick portion 132 connected with the ring portion 131 and extending outwards along the radial direction B. Each of the fixing members 14 includes a bolt 141 passing through the disk portions 114 and the fixing holes 124 of the corresponding limiting member 12 along the axial direction a, and a nut 142 locked to the end of the bolt 141.

The following describes a method for installing each weed-removing stick 13 on a corresponding position-limiting component 12, first, the loop portion 131 of the weed-removing stick 13 passes through the opening 126 of one of the positioning sheets 121, enters the extending slot 125, and makes the loop portion 131 be sleeved on the hook portion 123, then repeats the above steps to make the loop portion 131 be sleeved on the hook portion 123 of the other positioning sheet 121, then superposes the positioning sheets 121, and makes the openings 126 of the positioning sheets 121 face the opposite direction as shown in fig. 1, so that the opening 126 of each positioning sheet 121 is shielded by the other positioning sheet 121, and further makes the weed-removing stick 13 be rotatably limited on the positioning sheets 121, and thus, the weed-removing stick 13 can swing and rotate around the axial direction a as a rotating shaft relative to the positioning sheets 121, and can also have a rotational degree of freedom in other directions. When the weeding rod 13 needs to be removed, the corresponding fixing member 14 is only required to be unscrewed (but not required to be detached) to the extent that the positioning pieces 121 can rotate relatively, then the loop portion 131 of the weeding rod 13 passes through the gap between the hook portions 123 inwards, so that the loop portion 131 is only sleeved on one of the positioning pieces 121, then the positioning pieces 121 are unfolded, and at this time, the loop portion 131 is also only sleeved on one of the positioning pieces 121 and the opening 126 is not limited any more, so that the weeding rod 13 can be removed from the opening 126. Through the method, the trekking pole can be detached without disassembling the fixing piece 14, the operation is simple and convenient, and the parts cannot be scattered everywhere. Of course, the fixing member 14 can be removed to remove the position-limiting assembly 12 and the weed-removing stick 13 together.

As shown in fig. 1, 2 and 4, the connecting portion 113 of the cutter head 11 can be provided with a through hole 116, the cutter head 11 can be mounted on a mower 2 shown as a circle 4 through the through hole 116, the mower 2 can drive the cutter head 11 to rotate, centrifugal force can throw the weed removing rods 13 out along the radial direction B, each weed removing rod 13 can break weeds by means of through striking, so that the tissue surface of the weeds is rough and uneven, and the regeneration speed of the weeds can be slowed down. Because the weeding rods 13 can relieve the impact force by reverse rotation when colliding with obstacles such as stones and the like relative to the limiting components 12, the damage can be reduced by avoiding the situation of hard collision, and in addition, the weeding rods 13 are elastic, wear-resistant and not easy to break iron rods, the service life can be effectively prolonged. On the other hand, the positioning pieces 121 can limit the corresponding weed-removing bars 13 only by locking with a corresponding bolt 141 and overlapping in opposite directions, so that the weed-removing bars 13 have freedom of rotation but not to be separated, and have simple structure but skillful design and quick and convenient assembly and disassembly.

In conclusion, the weeding rods can break up the tissue surface of weeds, the tangent plane is uneven, the growth speed of the weeds is reduced, and each weeding rod can rotate relative to the cutter head after being impacted. Thereby relieving the impact force and avoiding the situation of hard-to-hard collision, and the hard and elastic rod-shaped bodies of the weeding rods are wear-resistant and can prolong the service life.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A rotary disc device of lawn mower comprises:

a cutter head;

2. The turntable device of claim 1, wherein each of the position-limiting members includes two positioning pieces stacked on each other along the axial direction of the cutter head and for a corresponding one of the weed-removing rods to be sleeved thereon, each positioning piece defining an opening for the weed-removing rod to pass through, when the positioning pieces are stacked, the openings of the positioning pieces face in opposite directions, so that the opening of each positioning piece is blocked by the other positioning piece, so that the weed-removing rod is rotatably limited on the positioning pieces.

3. The turntable device of claim 2, wherein each positioning plate of each positioning member has a ring plate portion surrounding and defining a fixing hole, and a hook portion connected to the ring plate portion and provided for the corresponding weed removing rod to be sleeved, the ring plate portion and the hook portion cooperate to define the opening, and each fixing member penetrates the fixing holes of the corresponding positioning member in the axial direction of the cutter head.

4. The turntable device of claim 3, wherein the hook portion of each positioning plate defines an extension slot communicating with the corresponding opening, and each weeding rod includes a ring portion passing through the extension slots of the corresponding limiting member and sleeved on the hook portion, and a rod portion connecting the ring portion and extending outward.

5. The turntable device of claim 4, wherein the cutter head includes a surrounding wall portion surrounding an opening extending in the axial direction, a connecting portion located in the opening and connecting the surrounding wall portion in the radial direction, and two axially spaced apart tray portions connected to the outer peripheral surface of the surrounding wall portion, the tray portions and the surrounding wall portion cooperating to define an annular groove into which one end of the stop members is inserted.

6. The turntable device of claim 5, wherein each of the fasteners includes a bolt passing through the body portions of the cutterhead and the fastening holes of the corresponding limiting member, and a nut locked to an end of the bolt.

7. The turntable device of a lawn mower as claimed in claim 1, wherein said weed removing bars are made of metal.