KR20100064730A

KR20100064730A - Grass cutting apparatus with chain type cutter

Info

Publication number: KR20100064730A
Application number: KR1020080123298A
Authority: KR
Inventors: 이영일
Original assignee: 이영일
Priority date: 2008-12-05
Filing date: 2008-12-05
Publication date: 2010-06-15

Abstract

The present invention relates to a lawnmower equipped with a chain blade, to minimize the transmission of rotational force to the obstacle when it hits an obstacle located on the ground, and to maintain a strong cutting force for cutting objects such as grass and grass, An object of the present invention is to provide a mower equipped with a chain blade having improved safety.

According to the present invention, a plurality of blades are connected by a connecting plate and a rivet to form a blade band to expand in a straight line by the action of centripetal force and centrifugal force during rotation to cut grass or grass, such as stones placed on the ground When colliding with obstacles, the centrifugal force decreases sharply, and the rotational force is not transmitted to the obstacles so that the obstacles do not bounce. Therefore, the cutting force can be effectively improved and high cutting force can be expected.

Description

Mowers with chain blades {GRASS CUTTING APPARATUS WITH CHAIN TYPE CUTTER}

The present invention relates to a lawnmower equipped with a chain blade, and more specifically, when colliding with an obstacle located on the ground, to minimize the transmission of rotational force to the obstacle, to maintain a strong cutting force for cutting objects such as grass and grass It relates to a mower equipped with a chain blade to improve the convenience and safety.

As is well known, a mower is a device for cutting grass or grass, which is a portable device that is portable and light in weight.

A conventional mowing machine is a device for cutting grass or grass by rotating a blade condensed with a shaft of the motor by a motor (not shown) that receives a power of an engine provided in a main body to rotate a shaft (not shown). .

More specifically, Figure 1 is an enlarged perspective view of the main portion showing the structure of the lawn mower according to a conventional embodiment.

Referring to this, the lawn mower 2 according to the conventional embodiment is composed of a rotary plate 10 coupled to the blade 12 is provided with a rotating portion 8 for receiving the rotational power of the engine (not shown) to rotate. And a support rod 4 coupled to the rotational portion 8 so that a handle (not shown) is provided so that a user can grip it, and a predetermined portion of the support rod 4 is provided by the blade 12. A protective cover 6 is provided to prevent the stones from protruding.

At this time, since the blade 12 is coupled to the rotating plate 10 in the form of a straight, when the blade 12 collides with the stone located on the ground, since the rotational force is transmitted as it is a lot of stones in the mowing situation Accidents caused by splashing on the user or a person located nearby are frequent accidents.

Therefore, improvement of the structure which prevents a stone from splashing even when the blade 12 collides was calculated | required.

Figure 2 is an enlarged perspective view of the main portion showing the structure of the lawn mower according to another embodiment of the prior art. 2, when the blade 34 is rotated with respect to the rotating plate 22 and the blade 34 collides with an obstacle such as a stone, the lawnmower 20 does not bounce to the rear of the blade 34. It is a mower that can be folded.

To this end, the rotating plate 22 has a shaft coupling hole 24 which is coupled to a shaft (not shown) at a predetermined portion of the center, and the pin insertion hole 26 is formed at the edge predetermined portion of the rotating plate 22. The guide holes 28 cut out in the edge direction from each of the pin insertion holes 26 are formed by being spaced apart at 120 degree angles, respectively.

In addition, a fixing pin 30 coupled to the guide hole 28 is coupled to one end of the saw blade 34, and the diameter of the fixing pin 30 is greater than that of the guide hole 28. The large washer 32 is coupled. On the other hand, the saw blade 34 is formed with a contact surface 36 inclined gently at its inner end portion.

At this time, the rotating plate 22 is provided with a movement limiting projection 38 to protrude to the lower surface at a position spaced from the guide hole 28 to limit the movement of the blade 34. The movement limiting projection 38 is a projection that restricts movement so that the blade 34 is not folded in the rotational direction when the blade 34 is unfolded by the action of the centrifugal force and centripetal force by the rotation of the rotary plate 22.

That is, the contact surface 36 of the blade 34 is in close contact with the movement limiting projection 38 when the centrifugal force and centripetal force act on the blade 34 to prevent the blade 34 from being folded in the rotational direction.

On the other hand, when the blade 34 collides with an obstacle such as a stone located on the ground, the blade 34 coupled to the rotating plate 10 is folded in the opposite direction of rotation, for this purpose, the lower surface of the rotating plate 10 In the opposite direction of rotation of the position where the blade 34 is coupled, the movement limiting projection 38 is not formed.

Therefore, the lawn mower 20 shown in FIG. 2 can prevent the rotational force of the blade 34 from being transmitted to all obstacles such as stones when the blade 34 collides with the stone. However, even in the case of the lawn mower 20 of FIG. 2 described above, the blade or the like may be alleviated from colliding with the blade 34, rather than the lawnmower 2 of FIG. 1, but the blade 34 still rotating at high speed may be provided. There was a problem that the stone bounced off when hitting the stone.

Therefore, the development of safer mowers has been required.

3 is an enlarged part of the main part showing the structure of the lawn mower according to another embodiment of the prior art. Referring to this, the lawn mower 40 shown in FIG. 3 is flexible so that the stone does not splash when the shear string 48 fixed to the rotating plate 42 is rotated so that the shear string 48 collides with an obstacle such as a stone. It is a mower equipped with a shear string 48.

That is, the shear string 48 is fixed to the lower end of the rotary plate 42, when the rotary plate 42 is rotated by receiving the rotational force of the rotary unit 44 is rotated together while forming a trajectory like a dotted line, such as grass or grass Cut to cut.

When the shear string 48 collides with an obstacle such as a stone, each part of the string is in a flexible state, and thus is easily wound around the surface of the obstacle so that the rotation force is dispersed to prevent the obstacle from being thrown out.

However, the shearing line 48 lacks the cutting force for cutting grass or grass, so that the working time is excessively increased, and it is difficult to cut grass or grass to a certain height. That is, there was a problem that the grass or the grass is coarsely cut.

The present invention has been made in view of the above-described prior art, and when it collides with an obstacle located on the ground, it minimizes the transmission of rotational force to the obstacle, and can maintain a strong cutting force for cutting objects such as grass and grass. It is an object of the present invention to provide a mower equipped with a chain blade that improves convenience and safety.

In order to achieve the above object, according to a preferred embodiment of the present invention an engine for generating a rotational driving force; A rotating unit which rotates by receiving a rotational driving force from the engine; In the lawn mower made of a support rod (4) made to rotatably fix the rotating part at one end thereof and to be gripped by the user, it is made in the form of a disc, is in close contact with the upper and lower surfaces, and the rotating part and the central predetermined portion Upper and lower rotary plates 52 and 54 having shaft coupling holes 56 to be coupled thereto; It is fixed to the edge of the upper rotary plate 52 by fixing pins 58, respectively, by the action of the rotation centrifugal force and centripetal force of the upper / lower rotary plate 52, 54 to the upper / lower rotary plate (52, 54) A mower is provided with a chain blade, characterized in that it consists of blade bands 59, 159 which are radially unfolded.

Preferably, the upper and lower rotary plates 52 and 54 are provided with a chain blade, characterized in that a predetermined length thereof is bent downward so that a gap of a predetermined length is formed when the upper and lower rotary plates 52 and 54 are coupled to each other. Mowers are provided.

Preferably, the blade strips 59 and 159 are provided with a mower with a chain blade, characterized in that a plurality of blades 62 are connected to each other in a chain shape by the connecting plate 60 and the rivet 64.

Preferably, the blade strip 59 is provided with a mower with a chain blade, characterized in that both ends of the upper rotating plate 52 is fixed in a ring shape by a plurality of mutually adjacent fixing pins (58).

Preferably, the blade strip 159 is provided with a mower with a chain blade, characterized in that one end is fixed to the upper rotary plate 52 by a single fixing pin (58).

Preferably, the blade 62 is provided with a mower with a chain blade, characterized in that configured in a diamond shape.

Cutting blades equipped with a chain blade according to the present invention is a plurality of blades are connected by a connecting plate and rivets to form a blade band to be unfolded in a straight line by the action of centripetal force and centrifugal force during rotation to cut grass or grass, on the ground When colliding with an obstacle such as a placed stone, the centrifugal force decreases sharply, so that the rotational force is not transmitted to the obstacle so that the obstacle does not bounce, thereby improving safety and expecting high cutting force.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

Figure 4 is a perspective view showing the structure of the lawn mower with a chain blade according to an embodiment of the present invention, Figure 5 is a side cross-sectional view showing the structure of the lawn mower with a chain blade according to an embodiment of the present invention.

Referring to this, the lawnmower 50 provided with the chain blade according to the embodiment of the present invention minimizes the transmission of rotational force to the obstacle when colliding with an obstacle located on the ground, and for cutting objects such as grass and grass. It is a mowing machine that maintains strong cutting force and improves convenience and safety.

That is, the blade 62 provided in the lawn mower 50 provided with a chain blade according to an embodiment of the present invention is connected to the connecting plate 60 to form a chain shape to increase the collision buffering force when the collision to the obstacle It is the blade 62 which reinforced the cutting force.

More specifically, the lawn mower 50 is provided with a chain blade according to an embodiment of the present invention, like a general lawn mower, an engine (not shown) generating a rotational driving force; A rotating unit (not shown) that receives rotational driving force from the engine and rotates the rotational driving force; The rotating part is rotatably fixed to one end thereof, and is made of a supporting rod 4 (see FIG. 1) which can be held by a user.

On the other hand, the mowing device 50 is provided with a chain blade according to an embodiment of the present invention is provided with a rotating plate which is rotated to cut the grass or grass coupled to the rotating part, in the present invention is made of a disc shape, The upper and lower rotary plates 52 and 54 are formed to be in close contact with each other, and the shaft coupling holes 56 formed at the central predetermined portion thereof are coupled to the rotating unit.

At this time, the upper and lower rotary plates 52 and 54 are bent downward in the center thereof, and a gap having a predetermined length is formed when the upper and lower rotary plates 52 and 54 are coupled to each other.

On the other hand, the lawn mower 50 is provided with a chain blade according to an embodiment of the present invention is fixed to the edge of the upper rotary plate 52 by fixing pins 58, respectively, the upper / lower rotary plate (52, 54) The blade band 59 is provided radially with respect to the upper / lower rotating plates 52 and 54 by the action of the rotational centrifugal force and the centripetal force.

At this time, the blade band 59 is a plurality of blades 62 are connected to each other in a chain shape by the connecting plate 60 and the rivet 64, by the rotation of the upper / lower rotary plates (52, 54) The blade band 59 has a centrifugal force and a centripetal force acting so that the ends of the blade band 59 are radially unfolded outward from the edges of the upper / lower rotating plates 52 and 54.

The radially spread blade band 59 rotates by the rotation of the upper / lower rotating plates 52 and 54, and forms a concentric trajectory with the upper / lower rotating plates 52 and 54, while the grass is located on the ground. Will cut the grass.

At this time, the blade band 59 is a plurality of blades 62 are connected in a straight form by a plurality of connecting plates 60 and rivets 64, when the blade band 59 rotates of centrifugal force and centripetal force Although unfolded in a straight line by the action, when the centrifugal force is removed, the connecting plate 60 performs a joint function so that a plurality of blades 62 are deformed around the rivet 64 of the connecting plate 60. .

Therefore, when the blade band 59 rotates, it is unfolded in a straight line by the action of centrifugal force and centripetal force, and when the blade band 59 collides with a stone or other obstacle located on the ground, the blade band 59 Since the applied centrifugal force is rapidly reduced, a plurality of blades 62 are deformed around the rivet 64 of the connecting plate 60 to drastically reduce the impact force applied to the obstacle. Therefore, even if the blade band 59 collides with an obstacle located on the ground such as a stone, the obstacle is transmitted as it is and does not bounce off to the outside.

On the other hand, the blade 62 is configured in a diamond shape, it is possible to maintain the same cutting force irrespective of the rotational direction and the contact position with the cutting object, such as grass or grass.

4 and 5, both ends of the blade strip 59 are fixed to the upper rotating plate 52 by a plurality of mutually adjacent fixing pins 58 in a ring shape. Therefore, the blade band 59 is shown as being made of two lines by the deformation of the ring form a straight line when the centrifugal force and centripetal force is applied.

Since the blade band 59 is rotated, only the outer surface of the blade 62 is used for cutting, so that the fixed pin 58 is released during use for a predetermined period of time so that the blade band 59 is turned upside down. If the blade 62 can be used unused blade will be able to use the blade 62 for a longer time.

6 is a perspective view showing the structure of the lawn mower equipped with a chain blade according to another embodiment of the present invention.

Referring to this, the mower 150 is provided with a chain blade according to another embodiment of the present invention is composed of the same upper and lower rotary plates 52, 54 and the rotary plate shown in Figs.

In addition, the lawn mower 150 is provided with a chain blade according to another embodiment of the present invention is fixed to the edge of the upper rotary plate 52 by fixing pins 58, respectively, the upper / lower rotary plate (52, 54) The blade band 159 which is radially unfolded with respect to the said upper / lower rotating plate 52 and 54 by the rotation centrifugal force of is provided.

At this time, the blade band 159 is a plurality of blades 62 are connected in a straight line by a plurality of connecting plates 60 and rivets 64, when the blade band 59 rotates centrifugal force and centripetal force Although unfolded in a straight line by the action of the centrifugal force is removed when the connecting plate 60 performs a joint function so that a plurality of blades 62 is deformed around the rivet 64 of the connecting plate 60 do.

Accordingly, when the blade band 159 rotates, the blade band 159 is unfolded in a straight line by the action of centrifugal force and centripetal force. When the blade band 159 collides with a stone or other obstacle located on the ground, the blade band 159 is applied to the blade band 159. Since the applied centrifugal force is rapidly reduced, a plurality of blades 62 are deformed around the rivet 64 of the connecting plate 60 to drastically reduce the impact force applied to the obstacle. Therefore, even if the blade band 159 collides with an obstacle located on the ground such as a stone, the obstacle is transmitted as it is and does not bounce off to the outside.

In addition, since the one end is fixed to the upper rotating plate 52 by a single fixing pin 58, the blade band 159 shown in Figure 6 when the centrifugal force and centripetal force acts on the blade band 159, 1 It is spread out in a straight line.

On the other hand, the mower equipped with a chain blade according to an embodiment of the present invention is not limited to the above embodiments, but various modifications can be made without departing from the technical gist of the present invention.

1 is an enlarged perspective view illustrating main parts of a lawnmower according to a conventional embodiment;

Figure 2 is an enlarged perspective view of the main portion showing the structure of the lawn mower according to another embodiment of the prior art,

Figure 3 is an enlarged perspective view of the main portion showing the structure of the lawn mower according to another embodiment of the prior art,

Figure 4 is a perspective view showing the structure of a lawnmower equipped with a chain blade according to an embodiment of the present invention,

Figure 5 is a side cross-sectional view showing the structure of a lawnmower equipped with a chain blade according to an embodiment of the present invention,

* Description of the symbols for the main parts of the drawings *

50,150: mowing machine, 52: upper rotary plate,

54: lower rotating plate, 56: shaft coupling hole,

58: pin, 59,159: blade band,

60: connecting plate, 62: blade,

64: Rivets.

Claims

An engine for generating a rotational driving force; A rotating unit which rotates by receiving a rotational driving force from the engine; In the lawn mower consisting of a support rod (4) made to rotatably fix the rotating portion to one end thereof and to be gripped by the user,

An upper and lower rotary plates 52 and 54 formed in a disk shape and tightly coupled to upper and lower surfaces, and having shaft coupling holes 56 coupled to the rotary part at a central predetermined portion thereof;

It is fixed to the edge of the upper rotary plate 52 by fixing pins 58, respectively, by the action of the rotation centrifugal force and centripetal force of the upper / lower rotary plate 52, 54 to the upper / lower rotary plate (52, 54) A mower equipped with a chain blade, characterized in that consisting of blades (59,159) spread radially.

The chain of claim 1, wherein the upper and lower rotary plates 52 and 54 are configured such that a predetermined length of the upper and lower rotary plates 52 and 54 is bent downward so that a gap of a predetermined length is formed when the upper and lower rotary plates 52 and 54 are coupled to each other. Mowers with blades.

2. The mower according to claim 1, wherein the blade bands (59,159) are connected to each other in a chain shape by a connecting plate (60) and a rivet (64).

According to claim 1, wherein the blade band 59 is provided with a chain blade, characterized in that both ends are fixed in a ring shape to the upper rotating plate 52 by a plurality of mutually adjacent fixing pins (58). Mowers.

4. The mower according to claim 1, wherein one end of the blade strip 159 is fixed to the upper rotating plate by a single fixing pin. 5.

4. The mower with a chain blade according to claim 3, wherein the blade is formed in a diamond shape.