KR200405005Y1 - Knives for a mowing machine - Google Patents

Abstract

The present invention relates to a mowing blade, and more particularly to a mowing blade that can reduce safety accidents and replace only the blade portion.

The blade for the mowing machine according to the present invention is a blade main body portion made of a metal plate having a plurality of coupling holes in the circumferential direction on the outer periphery of the peripheral portion and the outer periphery of the cutting edge of the mowing machine, the blade main body portion Forming a hole for coupling to one side to be coupled to form a blade portion formed on one side of the blade, characterized in that consisting of a coupling member for coupling the blade body portion and the blade portion.

In addition, the blade main body is characterized in that a plurality of through-holes are formed in the circumferential direction for weight loss, and the coupling holes formed in the blade main body are drilled at regular intervals according to the number of blades to be coupled.

And between the blade body portion and the blade portion is characterized in that the shock absorbing connection member is further provided and coupled

Mowing machine, connecting member, blade, through hole, furring, main body.

Description

Knives Blade {Knives for a mowing machine}

1 is a perspective view showing a mower according to the present invention

2 is a plan view showing a rotating part of the first embodiment according to the present invention

3 is a plan view showing another rotating part of the first embodiment according to the present invention

4 is an exploded perspective view of a first embodiment according to the present invention;

5 is an exploded perspective view of a second embodiment according to the present invention

Figure 6 is a plan view of the blade portion rotated state of the second embodiment according to the present invention

7 is an exploded perspective view of a third embodiment according to the present invention

<Explanation of symbols for the main parts of the drawings>

1: Body

2: working rod

3: rotating part

   32: blade body

     321: periphery 322: through hole 323: blade 324: coupling holes

33: blade

     331: blade 332: coupling holes

34: coupling member

     341: bolt 342: nut

35: connecting member

     351: connection joint portion 352: flexible member

The present invention relates to a mowing blade, and more particularly to a mowing blade that can reduce safety accidents and replace only the blade portion.

The mower is widely used as a portable device for attaching various types of blades to the rotary shaft of the driving means and rotating at high speed to produce weeds and scrubs such as farmhouses, orchards or ancestors' oxygen or gardens.

Since the blade portion used in the conventional mowing machine is integrally fastened to the rotating shaft, when performing mowing operation in a place where weeds or scrubs are grown a lot, the blade rotating at high speed may hit rock or solid wood embedded in the ground. In this case, not only the blade portion or even the lawn mower power transmission device is damaged, but also the broken blade portion is scattered in all directions, causing a personal injury.

This is because the blade part is completely fixed to the rotary shaft of the mower, so that the means to cushion the impact when the blade hits a solid object is not formed, so as to prevent worker's safety and damage to the power transmission part or blade part of the mower. it's difficult.

In addition, the conventional mowing machine has the inconvenience and uneconomical of replacing the entire blade device coupled to the rotary shaft of the mowing machine in order to replace the damaged blade unit.

      The present invention has been devised to solve the above problems, by forming a blade body coupled to the rotary shaft of the mowing machine and a blade coupled to it, when a strong impact occurs in the front or side of the blade portion, the blade portion to the blade body portion The blade is folded or moved up and down to instantly cushion the shock to reduce the damage of the blade, thereby to prevent the user's safety accident.

In addition, when the blade portion needs to be replaced, only the blade portion combined with the blade main body portion can be replaced, which has the purpose of reducing convenient replacement work and unnecessary parts.

Cutting blade for a mowing device according to a preferred embodiment of the present invention for achieving the above object is provided with a plurality of coupling holes in the circumferential direction on the outer periphery and the outer periphery of the central portion is coupled to the rotating end of the power transmission shaft of the mowing machine; Blade body portion made of a metal plate, the blade portion to form a coupling hole on one side to be coupled to the blade body portion, and the blade portion formed on one side, and a coupling member for coupling the blade body portion and the blade portion do.

Accordingly, the blade for the mowing machine according to the present invention rotates in the opposite direction of the direction of rotation when the blade hits the stone or hard object stuck to the ground and rotates in the opposite direction in the high speed rotation, thereby reducing the direct impact on the blade. Since the blade can be prevented from being damaged, the risk of safety accident can be reduced.

In addition, when replacing the blade portion, the dismantling member coupled to the blade body portion and replace only the blade portion is convenient replacement is possible and can reduce unnecessary parts member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a mower connected to the lower portion of the rotatable power transmission shaft 11 in the body portion 1 coupled to the mower blade 2 of the known mower according to the present invention, FIGS. 4 shows the rotating part 3 of the first embodiment according to the present invention.

The rotating part according to the first embodiment of the present invention is made of a metal plate having a plurality of coupling holes 324 in the circumferential direction on the outer periphery 321 and the outer periphery of the center portion is coupled to the power transmission shaft rotational end The blade body 33 and the blade body 33 and the blade body portion 33 having a blade 331 formed on one side to be coupled to the blade body portion 32 and the blade body portion to be coupled to the blade body portion and the blade portion It is composed of a coupling member (34).

The blade body portion has a plurality of through-holes 322 are formed in the circumferential direction for weight loss, the coupling holes formed in the blade body portion is perforated at regular intervals according to the number of blades to be coupled.

The coupling hole 324 formed in the blade body portion is determined by the number and the mutual position according to the number of the blade portion 33, for example, when the two blades when combined with two at 180-degree intervals When the three blades are combined, three are formed at 120-degree intervals, and when four are combined with four blades, four are generated at intervals of 90 degrees to be combined with the blades.

In addition, the blade (blade portion 331) formed in the blade portion may be formed in various shapes such as a circle or a waveform along the shape of the blade portion (33).

The blade portion fastened to the blade body portion is a metal plate having a semi-circular shape is coupled to the blade body portion by a coupling member such as a bolt 341 and a nut 342, and after the end of the bolt to prevent loosening Press the pitch portion of the press or further comprises an anti-loosening member.

The coupling member 34 is not limited to the bolts and nuts, and may be modified in various forms such as press pressing or welding by inserting a washer in the rivet.

In addition, a friction member (not shown), such as a bearing or a bushing, may be further provided between the outer side of the coupling member and the inner side of the coupling hole to prevent abrasion due to friction caused by the rotation of the blade portion. By bending the protrusion 332 of the blade portion 33 in a circular direction to protrude and then act as a bushing when engaged with the coupling hole 324 of the main body portion 32 (not shown).

In addition, the blade 323 may be formed on the outer circumferential surface of the blade main body so that the trees, weeds, etc., cut by the blade, may be cut once more.

Figure 5 shows a rotating part of the second embodiment of the present invention and Figure 6 shows that the blade portion is rotated into the blade body portion in the second embodiment of the present invention, the blade portion 33 during the mowing operation is the ground or protrusions When the vertical collision occurs with the blade portion freely moved up and down to prevent the damage of the blade portion and the blade body portion 32 and the blade portion 33 formed in the eight-shaped to reduce the impact force is transmitted to the operator Coupling member 34 to be coupled is composed of O-shaped annular chainring.

Figure 7 shows a rotating part of the third embodiment according to the present invention, the connection member 35 is further provided between the blade body portion 32 and the blade portion 33.

The connecting member is provided between the connecting joint 351 and the connecting joint portion having a U-shaped opening outward at both sides and a flexible member 352 having elastic force and damping force.

Hereinafter, the operation relationship of the present invention configured as described above are as follows.

In the state where the blade main body coupled with the blade portion is fixed to the power transmission shaft rotation end of the mowing machine, when the blade main body is rotated by the rotation of the power transmission shaft of the mowing machine, the blade part is also rotated and the centrifugal force is generated to unfold the blade part. Trees, weeds, etc. are cut by the blades of the blade portion.

When the rotating blade hits a hard object such as a stone or wood, the blade rotates into the blade main body to prevent damage to the blade, thereby preventing a safety accident due to a collision.

And when the tree, weeds, etc., which are cut by the unfolded blade portion is not completely cut, the cutting is made once again by the blade formed outside the blade main body portion to make a more clean cutting.

In addition, when the blade portion unfolded by centrifugal force does not collide horizontally with a hard object such as a stone or a tree and a slight side collision occurs, vertical force is generated in the blade portion.

At this time, due to the cushioning action by the connecting member connecting the blade and the blade main body, the blade is flexible and vertically moved to reduce the impact, and then rotates into the blade main body or restores to the normal position when collision is out. This will prevent damage to the blade.

On the other hand, if the blade portion is broken will be able to perform a continuous mowing operation by replacing the blade with a new blade after the binding of the coupling member connecting the blade body portion and the blade portion.

As described above, the cutting blade for the present invention can reduce the damage to the blade portion from the external impact applied to the blade portion during the mowing operation, there is an effect that can prevent the safety accident.

In addition, the replacement of the blade portion can be easily replaced only the blade portion of the blade only need to replace the replacement of the blade body and the binding member that connects the blade body portion and the blade unit, it is more effective to reduce unnecessary parts members. .

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various modifications are possible without departing from the scope of the present invention from this description. Therefore, the scope of the present invention should be construed by the claims described to include many such variations.

Claims (10)

In the mower having a rotatable power transmission shaft 11 in the body 1 coupled with the working rod 2, A blade main body portion 32 made of a metal plate having a center portion 321 coupled to the power transmission shaft rotating end portion and a plurality of coupling holes 324 in the circumferential direction on the outside of the peripheral portion; A blade portion 33 having a coupling hole 332 formed on one surface to be coupled to the blade main body portion, and a blade 331 formed on one side thereof; Blade for mowing machine, characterized in that consisting of the coupling member 34 for coupling the blade body portion and the blade portion. The method of claim 1, The blade body for cutting blades, characterized in that a plurality of through-holes 322 for weight loss are formed in the circumferential direction. The method of claim 1, Cutting blades, characterized in that the blade 323 is formed on the outer peripheral surface of the blade body. The method of claim 1, The blade portion for a mowing machine, characterized in that the blade portion made of a half-moon metal plate. The method of claim 1, Blades for mowing machines, characterized in that formed in the shape of an eight-shaped one side portion of the blade body portion. The method according to any one of claims 1 to 5, The coupling member is composed of a bolt (341) and nut (342) blades for mowing machine, characterized in that the pitch portion of the end of the bolt after the coupling is pressed or closed with a loosening prevention member. The method of claim 6, Blade of the mowing machine, characterized in that the friction member is further provided between the outer side of the coupling member and the inner side of the coupling hole. The method according to any one of claims 1 to 5, Cutting blade for the blade, characterized in that the blade is further provided between the main body portion and the blade portion is coupled to the shock absorbing member (35). The method of claim 8, The connecting member is provided between the connecting joint 351 and the connecting joint portion formed with the c-shaped opening on both sides and the blade for mowing machine, characterized in that consisting of a flexible member 352 having elastic force and damping force . The method of claim 1, The joining hole (324 or 332) is protruded in a circular (furring) blade for mowing machine, characterized in that the furring portion acts as a bushing.

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