KR20060113341A - Magic cutter - Google Patents

Abstract

Provided is a magic cutter which is flexibly connected with a power transfer shaft of a mower in which a checking unit, like check ball, is mounted on a rotation end of the power transfer shaft and checks the magic cutter blade, and which is rotated oppositely to the rotation direction when it collides with obstacle. The magic cutter is configured as a cutter structure which has more than two blades(5) and is made out of metal or synthetic resin plate as one piece, and comprises: a circumferential portion, formed in a center of the plate and connected to a rotation end of a power transfer shaft of the mower; more than at least one checking recess, arranged in the circumferential portion or in an outside circumference of the circumferential portion; and cutting edges(551,552), in one lateral side or in both front and rear sides of the plate.

Description

Magic Cutter

1, the structure of the power transmission shaft of the harvester.

2, the structure of the rotating end of the power transmission shaft.

3, a two-degree cutter blade structure of one embodiment.

4, the structure of a cutter blade 3 degrees in one embodiment.

5, a four-degree cutter blade structure of one embodiment.

6, an elliptical cutter blade structure of one embodiment.

7 and 2, cutter blade structure diagram of a modified embodiment of the cutter blade.

8 is a schematic view of an embodiment of a two-degree cutter blade incorporating a clutch device;

Fig. 9 is an anatomical schematic of a two-degree cutter blade incorporating a clutch device.

BRIEF DESCRIPTION OF THE DRAWINGS

1: power transmission shaft

2: power input shaft

3: rotating shaft

  31: Uneven gear for preventing flow 32: Thread of cutter binding nut

4: star wash

  41: Checking device (or check ball) 41A: Checking device (or check ball) 42: Peripheral groove 43: Storage space 44: Elastic spring 45: Ball

5: cutter 5A: blade

  51: Cast part 51A: Cast groove 52: Checking groove

     510: Checking device 511: first frame 512; second frame 513: binding member 513A: binding groove 514: elastic spring 515: ball 515A: storage space 516: bend 551: rear cutting edge 552: front cutting edge 552A: waveform Cutting edge 552B: Saw blade cutting edge 552C: V cutting edge

6: cutter support washer

7: Cutter blade fixing nut

8: Cutter nut

A: direction of rotation B: direction of rotation

The present invention relates to a magic cutter blade for a portable mowing device, and relates to a supplementary application of a standalone single blade cutter blade and a rotating shaft structure of Patent Application No. 10-2005-0036461.

In general, the integrated cutter blade used in combination with the power transmission shaft rotary end of the portable mowing machine is rigidly coupled to the rotary end of the power transmission shaft, and mainly weeds or stems of farmhouses, fields, orchards, or oxygen or garden are thick. It is used as a cutting tool for cutting unused scrubs, and while weeding in weeds and scrubs, we do not easily find foreign substances such as stones or tree roots stuck in the ground. At this time, when the integrated cutter blade rotated at a high speed collides with the foreign materials, there is a risk that the cutting machine or cutter blade is severely damaged or an operator may be injured or injured.

Also, in recent years, a lot of rolling type safety cutters have been developed to improve the above-mentioned disadvantages. However, the structure of the rolling type cutter blade is divided into a main body part and a blade part, and the cutter is composed of a member that couples the separated blade part to the main body part. Although the blade is formed, foreign matters such as blades of grass and sediment, dust, etc. leaked from the cut grass during the weeding are frequently caught between the gap between the main body and the blade part, and the blade part does not rotate freely, causing eccentricity. Due to the tremor phenomenon, weeding is difficult to moisturize anymore, so that farmers and users are inclined to prefer an integrated cutter blade in which risks exist.

Complementing the above-mentioned disadvantages of the existing cutter blade, the magic cutter blade is fluidly coupled to the power transmission shaft of the mower, which has a check means such as a check ball for checking the magic cutter blade at the rotary end of the power transmission shaft of the mower. When the obstacle and the cutter blade is collided, the cutter blade is rotated backward in the rotational direction, and the cutter blade, which is out of the obstacle, is rotated in the normal rotational direction to provide a cutter blade in which weeding is performed.

Looking at the structure of the power transmission shaft (1) of the preceding application to which the cutter blade is coupled or the high tide (4,6) for the mowing machine in large categories the power input shaft (2) receiving the power generated from the power generating unit such as the engine and the input It consists of a rotating shaft (3) and the outer casing for transmitting the power to the lower, in detail, the rotating shaft (3) is composed of a friction member and the like coupled to the outer casing, a plurality of tooth-shaped uneven gear to the bottom bottom ( 2, 31, and a thread 32 to form a rotating shaft 3, support for supporting the peripheral washer (4) coupled to the rotary shaft and the cutter blade (5) coupled to the peripheral washer It consists of the washer 6, the nut 8 or bolt which binds the cutter blade to the bottom of the support washer, and the anti-release washer 7 which protects these binding members from being loosened. Form a storage space in the The cutter blade of the eye view is fluidly coupled and checked to the peripheral washer (4) having the elastic spring 44 and the spherical or hemispherical ball 45 and the check ball formed so as not to escape to the outside. It is to provide a cutter blade or a cutter blade that is built-in or added to the cutter blade that can be retracted or idle idling backward in the rotational direction when there is an external force or impact on the cutter blade during operation,

Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings.

1 and 2 show the structure of the power transmission shaft and the rotating end of the power transmission shaft for the understanding of an example in which the cutter blade of the present invention is operated coupled to the power transmission shaft.

Figures 3 to 6 show a cutter blade of one embodiment, Figure 7 shows a variant of the cutter blade, and Figures 8 and 9 schematically show a cutter blade of another variant incorporating a clutch device. It is.

First and Figure 1 and 2 shows the structure of the power transmission shaft (1) and the rotary end of the mowing machine, the power input shaft (2) receiving the power generated from the power unit, such as the engine to transfer the input power to the lower part It consists of a rotating shaft (3) and the outer casing, and in detail, the rotating shaft (3) is composed of a friction member and the like coupled to the outer casing, and a plurality of serrated concave-convex gears (Figs. A support washer (6) provided with a screw thread (32) to form a rotary shaft (3), and supporting a peripheral washer (4) coupled to the rotary shaft and a cutter blade (5) coupled to the peripheral washer; It consists of a nut (8) or bolt that binds the cutter blade to the bottom of the support washer, and an anti-lock washer (7) that protects these binding members from being loosened, and forms a storage space in the peripheral washer or the support washer. Its elastic springs and spherical or The cutter blade of the eye is fluidly coupled and checked to the peripheral washer (41) provided with a check ball that is formed so as not to escape to the outside after inserting a spherical ball to perform normal operation. It is a power transmission shaft (Fig. 1) provided with a checking device 41 that can be temporarily retracted or idling backward in the rotational direction when the check is released.

Figure 3 relates to a two-degree cutter blade suitable for coupling to the power transmission shaft, a straight metal plate is formed in the center of the periphery 51 coupled with the peripheral washer (4) of the rotating end (Fig. 2) in the center and the outer circumferential shape of the periphery After opening the two check grooves 52 to form a knife blade that is developed to the left and right side a little narrower than the center portion to a certain length and then the cutting edges (551,552) on both sides of the front and rear sides of the plate Is a cutter blade.

4 is a three-degree cutter blade with one more blade portion than the two-degree cutter blade to form a blade portion at a predetermined length at 120-degree intervals, and check the peripheral groove 51 and the outer circumferential portion of the peripheral groove portion 52 in the center portion; It is a three-degree cutter blade formed by forming three cutting edges and forming cutting edges 551 and 552 on both sides of the plate.

5 is a blade formed in a predetermined size and length at 90 degrees intervals from the center of the metal plate, such as the shape of the two-degree cutter blade in two crisscross (+), and the outer edge of the peripheral portion 51 and the peripheral portion in the center It is a 4 degree cutter blade formed by opening four checking grooves 52 in the columnar shape, and forming cutting edges 551,552 on both sides of the four sides of a board.

Figure 6 shows a preferred embodiment when forming more than 5 blades in an oval shape, which is subdivided at a certain angle according to the number of blades formed from the center portion, and then a predetermined width between the outer blade portion and the inner blade portion is shown. Cut to form a stage and form a cutting edge 551 on the inner side of the stage or a cutting edge 552 on the outside of the stage and check the grooves 52 on the outer circumference of the periphery 51 and the periphery of the periphery of the plate. It is a cutter blade formed by forming four or many pieces.

The cutting edges 551 and 552 form the cutting edges 551 on the inside or the cutting edges 552 on the outside in the directions A and B in which the cutter blades are rotated.

Fig. 7 shows a variation of the cutter blades of the above three to six embodiments, which are connected to the periphery 51 formed at the center of the plate to open the checking groove 52 or to be provided on both sides of the front and rear sides of the plate. Waveforms (Fig. 7,552A) with blades (551,552) formed with grooves at regular intervals or saw blades (Fig. 7,552B) multi-stage in multiple layers, or V-shapes (Fig. 7,552C) with V grooves cut at full intervals. The modified example of the cutter blade provided with the cutting blade part of () is shown.

The cutter blade cutting edges 551 and 552 of the modified example provide an improved cutting force during the weeding operation by preventing slippage during the weeding operation.

8 and 9 illustrate an embodiment in which the checking means described above with reference to FIGS. 1 and 2 are embedded in a cutter blade, and the peripheral edge 51 of the cutter blades illustrated in FIGS. 3 to 7 is enlarged to a predetermined size. The first frame (Figs. 8 and 511) and the second frame (Figs. 8 and 512) are formed by a plurality of blades (Figs. 9 and 5) having a plurality of check grooves (Figs. 9 and 52A) formed at one end of the groove. Further, a peripheral portion (Figs. 8 and 51) is formed at the center of the first and second frames 511 and 512, and then a plurality of coupling grooves 513A are drilled on the outer circumference of the peripheral portion, and then the first frame 511 is Bending the outer side of the coupling groove 513A in a zigzag layer to form a groove into which the cutter blade is fluidly inserted, and seated check balls (Figs. 8, 514, 515) and metal plates (Figs. 9 and 5) formed at regular intervals therein. Next, a cutter blade (Figs. 8 and 5) formed by riveting and crimping the first and second frames.

The cutter blade has a disadvantage in that the process is more complicated in manufacturing than the cutter blade 5 of Figs. 3 to 6, and although not shown in the present invention, the checking device embedded in the cutter blade as shown in Figs. It is also possible to implement in other ways. For example, the first and second frames and the inner surface of the frame with sealing means such as O-rings are provided with female and male screw blades, and the hydraulic oil is introduced into the hydraulic oil to operate at rotational speed. Combining the binding member and the cutter blade 5 provided with the check groove 52, when the collision with the obstacle during the weeding operation, the cutter blade is temporarily retracted backward in the rotational direction or kept idle after the obstacle It is also possible to provide a cutter blade and an additional checking device of the above embodiment in which the cutter blade is rotated normally again and the weeding operation is carried out. The above embodiment shows only a preferred embodiment within the scope of the claims and the present invention. Various modifications of the invention are intended to be included within the scope of the present invention.

The above cutter blade is additionally provided with a check ball 41 on the power transmission shaft 1 or a cutter blade (FIG. 8) or a hydraulic clutch equipped with a checking device, which incorporates the check device on the cutter blade. It is to provide a cutter blade used for the device, the cutter blade during the weeding operation in the event of an unexpected collision with the cutter blade retreat backwards in the rotational direction, or the cutter blade is out of the obstacle after idling normally rotate again weeding work Proceeding is to provide a functional cutter blade that extends the service life of the mowing machine and prevents the risk of injury to the operator.

Claims (9)

      In the cutter blade (5) for the mowing machine provided with a check device 41 for checking in and out the cutter blade on the rotary end (rotation shaft, 3) of the power transmission shaft (1) of the mower, A peripheral portion 20 coupled to the power transmission shaft rotary end 3 in the center of the plate, At least one or more checking grooves 52 in the outer circumferential direction of the peripheral portion or peripheral portion and Magic cutter, characterized in that the cutter blade (5) formed of a plate integral type of metal or synthetic resin of two or more blades provided with cutting edges (551,552) on one side of the side or both sides of the front and rear.       In the cutter blade (5) used by attaching to the rotary end (rotation shaft, 3) of the power transmission shaft (1) of the mower, Peripheral portion 20 coupled to the power transmission shaft rotary end 3 in the center of the plate, a plurality of coupling grooves (Fig. 9, 513A) perforated on the outer circumference of the peripheral portion, and zigzag bent to the top in one direction outside the coupling groove The first frame (Figs. 8,511), A second frame (Figs. 8 and 512) having a periphery (Figs. 9 and 51) and a plurality of coupling grooves 513A perforated in the outer circumference of the periphery at the center of the plate; Cutting edges 551 and 552 are provided on one side of the plate or on both sides of the front and rear sides, and have a predetermined peripheral groove (Figs. 9 and 51A) in the center and a plurality of checking grooves associated with the peripheral grooves (Fig. 9 and 52A). With a blade plate (Figs. 9 and 5A) Form an elastic space (FIGS. 9,514) and a spherical or hemispherical ball (FIGS. 9, 515) to accommodate the spherical or semi-spherical balls (FIG. 9, 515) at a predetermined interval on a metal plate bent in a ring or ring shape, and the elastic spring (FIGS. 8, 514) in the storage space. Checking device (Figs. 9 and 41A) and the ball (Figs. The checking device (FIGS. 9 and 41A) and the blade plates (FIGS. 9 and 5A) are sequentially received between the first and second frames, and the coupling members (FIGS. 8 and 513) in the coupling grooves 513A of the first and second frames. Cutter blades (Figs. 8 and 5) formed of metal or synthetic resin of two or more blades formed by combining with each other and a blade plate (Figs. 9 and 5A) of the cutter blades are accommodated between the first and second frames. 9,41A) Magic Cutter, characterized in that configured to be rotated in check out.       In the cutter blade 5 of the mower, which is provided with a check device 41 for checking in and out of the cutter blade at the rotary end (rotation shaft, 3) of the power transmission shaft 1 of the mower, A peripheral portion 20 coupled to the power transmission shaft rotary end 3 in the center of the plate, At least one or more checking grooves 52 in the outer circumferential direction of the peripheral portion or peripheral portion and Cutting edges 551 and 552 provided on one side of the plate or on both sides of the front and rear sides are saw blades formed by cutting a plurality of elliptical grooves to form corrugations (Figs. 7,552A) or multi-stage with a plurality of layers (Figs. 7,552B). Or a cutter blade formed of a plate-integral plate of metal or synthetic resin of two or more blades formed with a V-shaped cutting blade having a V-spaced groove (Fig. 7,552C).       In the cutter blade 5 of the mower, which is provided with a check device 41 for checking in and out of the cutter blade at the rotary end (rotation shaft, 3) of the power transmission shaft 1 of the mower, A peripheral portion 20 coupled to the power transmission shaft rotary end 3 in the center of the plate, At least one or more checking grooves 52 in the outer circumferential direction of the peripheral portion or peripheral portion and Cutting edges 551 and 552 provided on one side of the plate or on both sides of the front and rear sides may be provided in the form of an ellipse round, or may be formed in a wave shape (see FIGS. 7 and 552A) by cutting a plurality of elliptical grooves in the ellipse round. Magic cutter characterized in that the cutter blade is formed of a plate integral type of metal or synthetic resin of two or more blades with a cutting edge of V-shaped (see Fig. 7,552C) cut V groove at intervals. The method according to any one of claims 1 to 4, The cutter blade (5) is a magic cutter, characterized in that further comprises three blades (Fig. 4). The method according to any one of claims 1 to 4, The cutter blade is characterized in that the magic cutter further comprises 4 blades (Fig. 5). The method according to any one of claims 1 to 4, The cutter blade 5 is subdivided at a predetermined angle according to the number of cutting edges formed at the center of the plate, and then a predetermined width between the cutting edge portion (Fig. 6,552) outside the circumference and the cutting edge portion (Fig. 6,551) on the circumferential side thereof. Magic cutter, characterized in that further comprises an oval (Fig. 6) formed by cutting in layers. The method according to any one of claims 1 to 4, Magic cutter, characterized in that the friction blade is further coated on the outer circumferential front and rear of the cutter blade (5) peripheral portion (51). The method according to any one of claims 2 to 4, The checking device of the cutter blade (Fig. 8, 510) is characterized in that the check device further comprises a hydraulic clutch consisting of a first and second frame, a female blade and a pair of screw blades on the inner surface of the frame, O-ring and hydraulic oil and members. Magic Cutter.

Images