TW201912005A - Mower cutter disc assembly enabling the cutting strings to be quickly installed and positioned and facilitating the adjustment of the length of the cutting strings - Google Patents

Abstract

A mower cutter disc assembly, which comprises a cutter frame and two cutting strings. The cutter frame has an upper seat and a lower seat. The upper seat is disposed with a connection part, two guiding parts, and two positioning parts. The connection part is protruded from the upper seat and located between the upper seat and the lower seat to form a space and connected with a driving device of the mower. Each guiding part and each positioning part are respectively located at two opposite sides of the upper seat. Each cutting string has a string body and an engagement member fixed to one end of the string body. The thickness of the engagement member is greater than that of the string body. Each string body has a part located in the space and the other part penetrating through each guiding part. Each engagement member is respectively positioned at each positioning part. Accordingly, the mower cutter disc assembly of this invention has the efficacies of enabling the cutting strings to be quickly installed and positioned and facilitating the adjustment of the length of the cutting strings through the structure of the guiding parts and the positioning parts.

Description

Mower cutter unit

The invention relates to a lawn mower, and in particular to a cutter head of a lawn mower.

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 surface cleaning is emphasized. Therefore, the lawn mower becomes An important tool for assisting finishing, and the current common types of lawn mower tools are widely used, among which metal blades and plastic knife ropes 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 Will cut into the leaves or branches of the grass, may also hit the stone or other relatively hard objects and cause the blade to break, and the broken blade will spin outward due to high-speed rotation, so many accidents occur, and the tool is easy to use. In the case of improper operation, the person or his ankle is cut, so there is a lack of security.

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 drive a cutterhead 4'. The blade is fixed by 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 used to repair the scissors rope when encountering different mowing requirements. When the length of the knife rope is changed, or when the knife rope needs to be replaced, the cutter head can only be removed to be replaced, and there are many defects to be improved.

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 knife holder having a top seat and a lower seat fixed to the upper seat, the upper seat being 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 In the rope body, a part of each of the rope bodies is located in the space, and another part is respectively passed through 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 guiding 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 arbor 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 set 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 of ordinary skill in the art that the present invention is not limited by the scope of the invention.

Referring to Figures 3 and 4, the cutter head set 10 of the lawn mower (not shown) of the first preferred embodiment of the present invention comprises a tool holder 30 and a second knife line 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. The positioning portions 331 of the lower seat 33 are disposed at the same position as the positioning portions 315 of the upper seat 31. The connecting portion 311 protrudes from the upper seat 31 and is located at the upper seat. Between the upper seat 33 and the lower seat 33, the connecting portion 311 can form a space S between the upper seat 31 and the lower seat 33. The connecting portion 311 can be used with the driving device of the lawn mower (in the figure). The guiding portions 313 and the positioning portions 315 of the upper seat 31 are respectively located on opposite sides of the upper seat 31, and the through holes 333 are symmetrically disposed on both 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 through holes 333 and the through holes 317 through two bolts 70 and is screwed to the two nuts (not shown). The upper seat 31 and the lower seat 33 are tight.

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. One of the rope bodies 51 of each of the knives 50 is located in the groove. Each of 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 engaging members 53 of the respective knives 50 are respectively positioned and embedded. In the first step 318, 332. It is worth mentioning that, in order to meet the requirements of use, the number of steps 318 of each positioning portion 315 of the upper seat 31 or 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 lower seat 33 of the cutter head 10' of the lawn mower of the second 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 to improve the cutting. The efficiency of grass 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 Figures 7 to 9, allowing the user to only change the blades of the lower seat 33. The 335 structure (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 passages. a hole 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) Each of the through holes is selectively located at a corresponding position of each of the through holes 333, and the bolts 70 are passed through the through holes 333 and the through holes, and are screwed to each of the screws. a cap to force the upper seat 31 and the lower seat 33. Thereby, when one of the diagonally opposite blades 335 is worn, the user can switch to the other unused diagonal blade 335 to continue cutting by turning the lower seat 33 to the other side. Grass work to improve the convenience of use.

10, 10'‧‧‧Cutter group

30‧‧‧Tool holder

31‧‧‧上上

311‧‧‧Connecting Department

313‧‧‧Guidance

314‧‧‧Bumps

315‧‧‧ Positioning Department

316‧‧‧ trench

317‧‧‧through hole

318‧‧‧ ladder

33‧‧‧The lower seat

331‧‧‧ Positioning Department

332‧‧‧Ladder

333‧‧‧through hole

335‧‧‧Knife

50‧‧‧knife rope

51‧‧‧rope

53‧‧‧Insert card

70‧‧‧ bolt

S‧‧‧ Space

1, 1'‧‧‧ lawn mower cutter

2, 2'‧‧‧ drive unit

3‧‧‧Metal blades

3'‧‧‧plastic knife rope

4'‧‧‧Cutter

Figures 1 and 2 are perspective views of a conventional lawn mower cutter. Fig. 3 is a perspective view showing a cutter head of the lawn mower according to the first preferred embodiment of the present invention. Fig. 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 the 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 the cutter head of the lawn mower according to the second preferred embodiment of the present invention, mainly showing the application of different types of blades.

Claims (8)

A cutter head set of a lawn mower, comprising: a knife holder having a top seat and a lower seat fixed to the upper seat, the upper seat being provided with a connecting portion, two guiding portions and two positioning portions, the connecting portion protruding The upper seat is located between the upper seat and the lower seat, so that a space is formed between the upper seat and the lower seat and is connected to the driving device of the lawn mower, and the guiding portion and each positioning portion are respectively located at the upper seat The two opposite sides; and the two knives respectively have a rope body and an insert member fixed to one end of the rope body, the insert member has a thickness greater than the rope body, and a part of each of the rope bodies is located in the space The other part respectively passes through the guiding portions, and each of the engaging members is respectively positioned at each of the positioning portions. The cutter head set of the lawn mower according to Item 1, wherein the positioning portion is mainly composed of at least one step, and the insert of the knife cord can be positioned in one of the at least one of the steps. . The cutter head 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 in. The cutter head set of the lawn mower according to claim 1, wherein the lower seat is provided with two positioning portions, and each positioning portion of the lower seat is located at the same position as each positioning portion of the upper seat. The cutter head of the lawn mower according to claim 1, wherein the lower seat is provided with two symmetrical blades. The cutter head set of the lawn mower of claim 5, wherein each of the blades of the lower seat is disposed adjacent to each of the knives. The cutter head set of the lawn mower according to Item 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 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, each of the through holes being symmetrically disposed on two sides of the lower seat, wherein the upper seat is provided And a through hole, each of the through holes is located at a corresponding position of each of the through holes, and 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 seat.