WO2019041307A1

WO2019041307A1 - Cutting head assembly of mower

Info

Publication number: WO2019041307A1
Application number: PCT/CN2017/100188
Authority: WO
Inventors: 张国彬
Original assignee: 张国彬
Priority date: 2017-09-01
Filing date: 2017-09-01
Publication date: 2019-03-07

Abstract

A cutting head assembly of a mower comprises a blade holder (30) and two cutting cords (50). The blade holder (30) has an upper seat (31) and a lower seat (33) fixedly provided on the upper seat (31). The upper seat (31) is provided with a connecting portion (311), two guide portions (313), and two positioning portions (315). The connecting portion (311) protrudes from the upper seat (31) and is disposed between the upper seat (31) and the lower seat (33), such that a space (S) is formed between the upper seat (31) and the lower seat (33), the connecting portion is connected to a driving device, and the guide portions (313) and the positioning portions (315) are respectively located on two opposite sides of the upper seat (31). The two cutting cords (50) each have a cord body (51) and an engagement member (53) fixedly connected to one end of the cord body (51). The engagement member (53) is thicker than the cord body (51). Part of each cord body (51) is located in the space (S). The other part of each cord body (51) passes through the corresponding guide portion (313). The engagement members (53) are respectively positioned at the positioning portions (315). The cutting cords (50) on the cutting head assembly can be quickly mounted or replaced in order to easily adjust the lengths of the cutting cords (50).

Description

Mower cutter unit

Technical field

The invention relates to a lawn mower, and more particularly to a cutter head of a lawn mower.

Background technique

With the improvement of living standards, the maintenance and requirements for the environment are getting higher and higher. Especially in the era of environmental protection awareness, the importance of grassland maintenance, field consolidation and road cleaning is emphasized. Therefore, the lawn mower becomes An important tool for assisting finishing, and the current common mower cutters have many styles, among which metal blades and plastic knives are widely used.

As shown in Fig. 1, the conventional lawn mower cutter 1 is driven by a driving unit 2 to rotate a metal blade 3, and the cutters of this type have a wide range of cutting and good effects, but in the course of mowing, the cutters are cut in addition to cutting. Outside the blade or branch, it is possible to hit a stone or other relatively hard object and cause the blade to break. The broken blade will spin outward due to high-speed rotation, so that many accidents occur, and the tool is easy for the user. In the case of improper operation, the person or his ankle is cut, so there is a lack of safety.

In order to overcome the aforementioned shortcomings, the industry has developed a mower cutter 1' (shown in Figure 2) using a soft plastic knife cord 3', which is driven by a drive unit 2' to rotate a cutter 4' In order to cut off the blade of grass by using a knife rope fixed in the cutter head; however, the lawn mower cutter fixes the knife rope in the cutter head, and can only be repaired when encountering different mowing requirements The scissors rope can change the length of the knife rope, or when it is necessary to replace the knife rope, the cutter head can only be removed before it can be replaced, and there are many defects to be improved.

Invention disclosure

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a cutter head of a lawn mower that can quickly install and replace a knife rope and facilitate adjustment of the length of the knife rope.

In order to achieve the above object, the cutter head of the lawn mower of the present invention comprises a tool holder and a second knife rope. The tool holder has a top seat and a lower seat fixed to the upper seat, and the upper seat is provided with a connecting portion. a guiding portion protruding between the upper seat and the lower seat to form a space between the upper seat and the lower seat and connected to the driving device of the lawn mower, Each of the guiding portions and each of the positioning portions are respectively located on opposite sides of the upper seat, and each of the knives has a rope body and an insert member fixed to one end of the rope body, the thickness of the insert member being greater than The rope body, each part of the rope body is located at the In the space, another portion is respectively passed through each of the guiding portions, and each of the engaging members is respectively positioned at each of the positioning portions.

It can be seen from the above that the cutter head of the lawn mower of the present invention can quickly install, position, and adjust the length of the cutter cord through the guide portion and the positioning portion structure.

In the present invention, the positioning portion of the upper seat is mainly composed of at least one step, and the insert of the knife cord can be positioned in at least one of the steps.

In the present invention, the guiding portion of the upper seat includes a protrusion and a groove provided in the protrusion, and a part of the rope body of the rope is located in the groove.

In the present invention, the lower seat is provided with two positioning portions, and the positioning portions of the lower seat are respectively located at the same positions as the positioning portions of the upper seat.

In the present invention, the lower seat is provided with two symmetrical blades.

In the present invention, each of the blades of the lower seat is disposed adjacent to each of the blades.

In the present invention, the lower seat is provided with four through holes, each of the through holes is symmetrically disposed on four sides of the lower seat, and the upper seat is provided with two through holes, each of the through holes being selectively located at each of the through holes Corresponding position, through the two screws through the through holes and the through holes and screwed to the second nut to force the upper seat and the lower seat.

In the present invention, the lower seat is provided with two through holes, each of the through holes is symmetrically disposed on two sides of the lower seat, and the upper seat is provided with two through holes, each of the through holes being located at a corresponding position of each of the through holes And passing through the through holes and the through holes through two bolts and screwing on the two nuts to press the upper seat and the lower seat.

The detailed construction, features, assembly or use of the cutter head of the lawn mower provided by the present invention will be described in the detailed description of the subsequent embodiments. However, it should be understood by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

The invention is described in detail below with reference to the accompanying drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

1 and 2 are perspective views of a conventional lawn mower cutter.

3 is a perspective view of a cutter head of the lawn mower according to the first preferred embodiment of the present invention.

4 is an exploded view of the cutter head of the lawn mower of FIG. 3.

Fig. 5 is a bottom view of the cutter head of the lawn mower of the present invention, mainly showing a state in which the cutter rope is embedded in the guide portion and the positioning portion.

Fig. 6 is similar to Fig. 5, with the difference that the number of steps of the positioning portion is different.

7 to 9 are top views of a cutter head of a lawn mower according to a second preferred embodiment of the present invention, mainly showing the application of different types of blades.

Among them, the reference number:

10, 10' cutter head

30 tool holder

31 upper seat 311 connection

313 guide 314 bump

315 positioning part 316 groove

317 through hole 318 ladder

33 lower seat 331 positioning part

332 steps 333 through holes

335 blade

50 knife rope

51 rope body 53 inserts

70 bolts S space

1, 1' mower cutter 2, 2' drive unit

3 metal blade 3' plastic knife rope

4' cutter head

The best way to implement the invention

The technical contents and features of the present invention will be described in detail below with reference to the preferred embodiments of the present invention, and the directionality of "before", "after", "inside", "outside", etc. mentioned in the contents of the specification. Descriptive terms are merely illustrative terms used in the normal direction of use, and are not intended to limit the scope of claims.

Referring to FIG. 3 and FIG. 4, the cutter head set 10 of the lawn mower (not shown) of the first preferred embodiment of the present invention includes a tool holder 30 and a second knife rope 50.

a tool holder 30 has a top seat 31 and a lower seat 33 fixed to the upper seat 31. The upper seat 31 is provided with a connecting portion 311, two guiding portions 313, two positioning portions 315 and two through holes 317, and the lower seat 33 is provided with two positioning portions 331 and two through holes 333, and each positioning portion 331 of the lower seat 33 is disposed at The positioning portion 311 of the upper seat 31 protrudes from the upper seat 31 and is located between the upper seat 31 and the lower seat 33. The connecting portion 311 is available between the upper seat 31 and the lower seat 33. A space S is formed. The connecting portion 311 can be connected to the driving device (not shown) of the lawn mower. The guiding portions 313 and the positioning portions 315 of the upper seat 31 are respectively located at the upper seat. The two opposite sides of the through hole 333 are symmetrically disposed on opposite sides of the lower seat 33. Each of the through holes 317 is located at a corresponding position of each of the through holes 333, and passes through the two bolts 70 through the respective through holes. The hole 333 and each of the through holes 317 are screwed to two nuts (not shown) to press the upper seat 31 and the lower seat 33.

The two knives 50 respectively have a rope body 51 and an inserting member 53 fixed to one end of the rope body 51. The thickness of the inserting member 53 is larger than the rope body 51, and a part of each of the rope body 51 is located at the In the space S, another portion of each of the rope bodies 51 respectively passes through the guiding portions 31, and each of the engaging members 53 is respectively positioned at each positioning portion 315 of the upper seat 31 and each positioning of the lower seat 33. Part 331.

As shown in FIG. 4 and FIG. 5, each of the guiding portions 313 includes a protrusion 314 and a groove 316 disposed in the protrusion 314. A part of the rope body 51 of each of the knives 50 is located in the groove 316. The positioning portions 315 of the upper seat 31 and the positioning portions 331 of the lower seat 33 are respectively formed by three

steps

318 and 332, and the inserting members 53 of the respective cutting wires 50 are respectively positioned and embedded in the first One of the

steps

318, 332. It is worth mentioning that, in order to meet the requirements of use, the number of steps 318 of the upper seat 31 or the positioning portions 315 of the lower seat (not shown) may also be two steps 318 as shown in FIG.

As shown in FIG. 7, a cutter head set 10' of a lawn mower according to a second preferred embodiment of the present invention is different from the cutter head set 10 of the lawn mower of the first preferred embodiment in that the second The lower seat 33 of the cutter head 10' of the lawn mower of the preferred embodiment is provided with two symmetrical blades 335, and each of the blades 335 is disposed adjacent to each of the knives 50, respectively. In this way, the cooperation between the cutter set 10' of the present invention and each of the cutter blades 335 can greatly reduce the number of times the cutter head 10' cuts the weeds or branches back and forth. The efficiency of mowing operations. In addition, in different mowing applications, the cutter head set 10' of the lawn mower of the present invention can also be as shown in FIGS. 7-9, so that the user only needs to change the blade 335 of the lower seat 33. Structures (such as curved, trapezoidal, etc.) can be easily and easily achieved.

Furthermore, if the lower seat 33 used by the user is as shown in FIG. 9 and the oblique angles of the respective blades 335 of the lower seat 33 are symmetrical, the lower seat 33 can be provided with four through holes 333. (the two of the through holes 333 are shielded by the upper seat 31), and each of the through holes 333 is symmetrically disposed on four sides of the lower seat 33, and the upper seat 31 is provided with two through holes (ie, the two bolts 70 a position of the shield, each of the through holes is selectively located at a corresponding position of each of the through holes 333, and each of the through holes 333 passes through each of the through holes 333 and each The through hole is screwed to each of the nuts to press the upper seat 31 and the lower seat 33. Thereby, when one of the diagonally opposite blades 335 is worn, the user can continue to change to another unused diagonally opposite blade 335 by turning the lower seat 33 to the other side. Mowing work to improve the convenience of use.

The invention may, of course, be embodied in a variety of other embodiments without departing from the spirit and scope of the invention. Changes and modifications are intended to be included within the scope of the appended claims.

Industrial applicability

The invention discloses a cutter head set of a lawn mower, comprising a knife holder and a second knife rope. The knife holder has a top seat and a lower seat. The upper seat is provided with a connecting portion, two guiding portions and two positioning portions, and the connecting portion protrudes from the upper seat. And between the upper seat and the lower seat to form a space and connected to the driving device of the lawn mower, each guiding portion and each positioning portion are respectively located on opposite sides of the upper seat, and each of the knives has a rope body and a solid body respectively An insert member connected to one end of the rope body, the thickness of the insert member is larger than the rope body, a part of each rope body is located in the space, and the other part passes through the guide portions, and the respective insert members are respectively positioned at each position unit. Thereby, the cutter head of the lawn mower of the present invention can quickly install, position, and adjust the length of the cutter cord through the guiding portion and the positioning portion structure.

Claims

A cutter set of a lawn mower, characterized in that it comprises:

a tool holder having a top seat and a lower seat fixed to the upper seat, the upper seat is provided with a connecting portion, two guiding portions and two positioning portions, the connecting portion protruding from the upper seat and between the upper seat and the lower seat, a space is formed between the upper seat and the lower seat and connected to the driving device of the lawn mower, wherein the guiding portion and each of the positioning portions are respectively located on opposite sides of the upper seat;

The two knives respectively have a rope body and an insert member fixed to one end of the rope body, the insert member having a thickness greater than the rope body, a part of each of the rope bodies being located in the space, and the other part Each of the guiding portions is respectively disposed, and each of the engaging members is respectively positioned at each of the positioning portions.
A cutter head set for a lawn mower according to claim 1, wherein the positioning portion is mainly composed of at least one step, and the insert member of the knife rope can be positioned at one of the at least one of the steps. in.
The cutter set of the lawn mower according to claim 1, wherein the guiding portion comprises a protrusion and a groove provided in the protrusion, and a part of the rope body of the rope is located in the groove Among them.
The cutter head set of the lawn mower according to claim 1, wherein the lower seat is provided with two positioning portions, and the positioning portions of the lower seat are respectively located at the same positions as the positioning portions of the upper seat.
A cutter head set for a lawn mower according to claim 1 wherein the lower seat is provided with two symmetrical blades.
A cutter head set for a lawn mower according to claim 5, wherein each of the blades of the lower seat is disposed adjacent to each of the blades.
The cutter head set of the lawn mower according to claim 5, wherein the lower seat is provided with four through holes, each of the through holes being symmetrically disposed on four sides of the lower seat, and the upper seat is provided with two through holes Each of the through holes is selectively located at a corresponding position of each of the through holes, and passes through the through holes and the through holes through two screws and is screwed to the two nuts to press the upper seat and the lower portion. seat.
The cutter head set of the lawn mower according to claim 1 or claim 5, wherein the lower seat is provided with two through holes, and the through holes are symmetrically disposed on both sides of the lower seat, and the upper seat is provided There are two through holes, each of which is located at a corresponding position of each of the through holes, passes through the through holes and the through holes through two bolts and is screwed to the two nuts to press the upper seat and the lower portion seat.