KR101926182B1 - Grass eliminator - Google Patents

Abstract

The present invention relates to a grass eliminator, which comprises: a horizontally disposed base unit (110), a handle (120), a pair of wheels (160), a cutting unit (130), a driving unit (140), a vibration unit (150), and a cover (170). Accordingly, the grass eliminator can move a main body using the wheels and maintain an interval between a rotating shaft and the ground.

Description

Mowers {GRASS ELIMINATOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a lawn mowers, and more particularly, to a lawn mowing machine in which a blade and a blade independently rotate so that the blade does not come into contact with the ground regardless of the height of the ground.

Generally, mowers are used to remove weeds from paddy fields, fields, gardens, flower beds,

An example of a conventional lawn mower has been disclosed in Laid-Open Patent Application No. 10-2006-0041050 "Lawn Mower ". The conventional lawnmower as described above is provided with a disk-shaped blade or a cutting wire horizontally formed on the ground on the end of a body pipe held by a worker, and the blade or wire is rotated by an engine to remove weeds.

However, since the blade or the wire rotating in the horizontal direction on the ground is disposed at the end of the body pipe held by the operator, there is a disadvantage that the gap with the ground is not kept constant. That is, the height at which the blade separates from the paper surface differs depending on the height at which the operator lifts the body pipe by hand. As a result, the blade may be buried in the earth or soil, or it may be idle in a position without grass.

In addition, a power transmission means for transmitting the driving force of the engine to the blade is disposed inside the body pipe held by a worker. As a result, vibrations and shocks are transmitted to the worker's hands and wrists, thereby imposing a strain on the worker's physical strength.

In addition, when a conventional blade or a wire collides with a stone during weeding, there is a problem that the impact is transmitted to the blade and the main body where the engine is located, causing the blade to shake or the blade to be damaged. In addition, there was a case where the worker was injured because the stones struck against the blade were pointing toward the worker.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a grass mower which can move the main body by using wheels and maintain a constant distance between the rotary shaft and the ground.

Another object of the present invention is to provide a lawn mower which can be safely used by folding a plurality of blades.

Another object of the present invention is to provide a lawn mower which can reduce the physical burden of the worker by separating and positioning the handle and the motor driven by the operator.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by a lawn mower. The lawn mower of the present invention comprises: a base portion 110 arranged horizontally; A handle 120 coupled to the front of the base 110 to adjust the direction of movement of the base 110; A pair of wheels 160 coupled to the rear of the base 110 to allow the base 110 to move in an adjustment direction of the handle 120; A rotating shaft 131 coupled to the pair of wheels 160 in a horizontal direction and a rotating shaft 131 coupled to the rotating shaft 131 at regular intervals along the length of the rotating shaft 131, A cutting portion 130 having cutting blades 135 and 135a; A driving unit 140 provided on an upper surface of the base unit 110; A driving unit 150 for transmitting driving force of the driving unit 140 to the rotating shaft 131; And a cover 170 extending to cover the upper portion of the cutting portion 130 and protecting the cutting portion 130 at the rear of the base portion 110. The pair of wheels 160 The cutting unit 130 is rotatably coupled to the rotary shaft 131 so as not to receive the rotational force of the rotary shaft 131. The cutting unit 130 includes a plurality of Blade brackets 133 and 133a; And the blades 135 and 135a are rotatably coupled to the blade brackets 133 and 133a by a blade support shaft 137. The blades 135 and 135a are rotated by gravity And is folded down from the blade brackets 133 and 133a. When the rotation shaft 131 rotates, the blade is rotated coaxially with the blade brackets 133 and 133a by a centrifugal force to cut the paste.

According to one embodiment, the plurality of blade support shafts 137 are arranged at different angles with respect to the rotation shaft 131

According to one embodiment, the base portion 110 includes a handle link 117 protruded forward and coupled with the handle 120, and a handle link 117 extending rearward on both sides to insert the rotation shaft 131 And a pair of rotating shaft coupling rings 113. The pair of wheels 160 are coupled to the rotating shaft 131 in an idly rotated manner by bearings 161. [

The driving shaft 141 coupled to the driving unit 140 is horizontally positioned on the rotating shaft 131 and the driving unit 150 is vertically movable with respect to the driving shaft 141 and the rotating shaft 131. [ And includes a drive shaft 141 and a transmission shaft 151 that is gear-engaged with the drive shaft 141 and the rotation shaft, respectively. The rotation shaft 131 is rotated in a direction toward the cover 170 from the outside.

In the lawn mower according to the present invention, since the plurality of blades are kept spaced apart from the ground by a wheel, the grass is stably driven without being buried in the soil, and the grass is cut.

In addition, the operator simply presses or pulls the handle, and there is no need to carry the body pipe directly by hand as in the conventional case, so that the physical burden can be significantly reduced.

Further, since the cover is provided on the upper surface of the blade at a predetermined area and the rotary shaft rotates toward the cover direction, even if the pebbles are splashed, they are hit against the cover, thereby preventing the pedestrian or the operator from being injured.

Further, since the blade of the present invention is provided to be folded or unfolded with respect to the blade bracket, if the striking pin strikes the rotating blade, the blade is folded, thereby preventing damage to the blade.

1 is a perspective view showing the structure of a lawn mower according to the present invention,
2 is a plan view showing a plan structure of a lawn mower according to the present invention,
3 is a perspective view showing the structure of a base portion of a lawn mower according to the present invention,
FIG. 4 is a perspective view showing a cutting part and a construction of a driving part of a lawn mower according to the present invention,
FIG. 5 is a view showing a configuration of a cutting unit in a standby state of a lawn mower according to the present invention,
6 is an exemplary view showing a configuration of a cutting unit at the time of removing weeds in a lawn mower according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 1 is a perspective view showing the structure of a lawn mower 100 according to the present invention, and FIG. 2 is a plan view showing a plan structure of lawn mower 100.

1, the lawn mower 100 according to the present invention includes a base 110 disposed horizontally on the ground, a handle 120 extending from the base 110 to be held by a worker, A driving unit 140 provided on the upper surface of the base unit 110 to provide a driving force for rotating the cutting unit 130; A pair of wheels 160 provided on both sides of the base 110 for moving the base 110 and a driving unit 150 for transmitting the driving force of the driving unit 140 to the cutting unit 130, And a cover 170 coupled to the base 110 to cover the upper portion of the cutting portion 130.

The lawnmower 100 according to the present invention is configured such that the cutting part 130 and the driving part 140 are coupled to the base part 110 and the grass is cut along the direction in which the operator presses the handle 120 . At this time, a pair of wheels 160 are disposed on the rotating shaft 131 of the cutting unit 130 and are in contact with the ground, so that the rotating shaft 131 is constantly spaced apart from the ground surface.

Accordingly, regardless of the irregularities of the ground, the blades 135 and 135a are not stuck on the ground, and the grass can be cut while maintaining a constant interval on the ground without floating from the ground.

In addition, the handle 120 operated by the operator, the driving unit 140, the cutting unit 130, and the driving unit 150 are independently driven to transmit vibrations and shocks through the conventional driving unit to the worker, This problem can be solved.

The base 110 is moved by the pair of wheels 160 and supports the driving unit 140 and the cutting unit 130 and the driving unit 150 in a stable operation. 3 is a perspective view showing the configuration of the base unit 110. As shown in Fig.

As shown in the figure, the base 110 includes a base frame 111, a base plate 112 horizontally disposed on the upper surface of the base frame 111, A cover coupling mount 115 protruding from the rear end of the base plate 112 and coupled to the cover 170; And a handle link 117 coupled with the handle 120.

The base frame 111 is formed in a U shape and the handle link 117 provided at the front end is engaged with the handle 120 and the rotation axis coupling ring 113 provided at the rear end is coupled to the rotation axis 131 And is coupled to a pair of wheels 160.

The rotating shaft coupling ring 113 is formed through the rotating shaft insertion hole 113a. 4, a rotation shaft 131 is inserted into a pair of rotation shaft insertion holes 113a, and a pair of wheels 160 are rotatably mounted on the rotation shaft 131 at the outer side of the rotation shaft insertion hole 113a Lt; / RTI >

The base plate 112 is provided so as to cover an upper surface of the base frame 111. On the upper surface of the base plate 112, a driving unit 140 housing an engine (not shown) is loaded. At the rear end of the base plate 112, a plurality of cover engaging mounts 115 are protrudingly formed and engaged with the cover 170 by a piece (not shown).

The handle link 117 is engaged with the base coupling shaft 121 of the handle 120. At this time, the handle link 117 and the base coupling shaft 121 are engaged by the handle rotation shaft 118 as shown in Fig. Thereby, the operator can rotate the handle 120 up and down.

The handle 120 extends a certain length from the tip of the base portion 110 through the handle link 117. [ The handle 120 may be provided to be adjustable in length. The operator can push or pull the handle 120 to move the base unit 110 by operating the wheel 160. [

The cutting unit 130 is provided between a pair of rotating shaft coupling rings 113 of the base frame 111 and is rotated by the driving unit 140 to cut the pool. 4 is a perspective view showing a configuration of the cutting unit 130, the driving unit 140, and the driving unit 150. As shown in FIG.

The cutting unit 130 includes a rotating shaft 131, a first bevel gear 132 disposed at an end of the rotating shaft 131, and a plurality of first bevel gears 132 disposed at regular intervals along the longitudinal direction of the rotating shaft 131. [ Blade brackets 133 and 133a and blades 135 and 135a rotatably coupled to the blade brackets 133 and 133a.

The first bevel gear 132 provided at one end is engaged with the fourth bevel gear 153 of the driving unit 150 and receives a driving force to receive the rotating bevel gear 153. [ do. A plurality of blade brackets 133 and 133a are provided in the longitudinal direction of the rotating shaft 131 to support the blades 135 and 135a. The blade brackets 133 and 133a are formed so as to project radially outward of the rotation shaft 131. [

At this time, the blade brackets 133 and 133a are alternately arranged at intervals of 90 degrees along the longitudinal direction of the rotating shaft 131. [ That is, when the blade bracket 133 positioned first along the rotation axis 131 is disposed on the rotation axis 131, the blade bracket 133a positioned at the second position is disposed forward and backward on the rotation axis 131.

A pair of blade brackets 133 are arranged to face the rotation axis 131 and are arranged to be spaced 90 degrees from the neighboring blade brackets 133a.

The blades 135 and 135a are rotatably coupled to the respective blade brackets 133 and 133a by a blade support shaft 137. The blades 135 and 135a are provided so as to be bent in an "L" shape. Is formed coaxially with the blade brackets 133 and 133a to have a constant length, and the end portions are bent in a predetermined length in the horizontal direction.

The blades 135 and 135a are provided with blades in one direction to facilitate cutting the grass. And are formed in an "L" -shaped shape, the blades 135 and 135a can cut the pool at various positions regardless of the vertical direction and the horizontal direction.

Meanwhile, the blades 135 and 135a according to the present invention are freely rotatably coupled without being fixed to the blade brackets 133 and 133a. When the driving force of the driving unit 140 is not applied thereto, the blades 135 and 135a are folded downward with respect to the blade brackets 133 and 133a as shown in FIG. That is, the blades 135 and 135a are coupled to the blade brackets 133 and 133a so as to be rotatable by an external force.

6, when the driving force of the driving unit 140 is applied and the rotating shaft 131 is rotated, the blades 135 and 135a are unfolded by the centrifugal force against the blade brackets 133 and 133a, The grass is cut.

Here, since the blades 135 and 135a are folded or unfolded with respect to the blade brackets 133 and 133a, when the blades 135 and 135a collide with the blades 135 and 135a during the shearing operation, the blades 135 and 135a are folded. In other words, when the impact is applied to the blades 135 and 135a, the blades 135 and 135a are folded. Therefore, the damage to the blades 135 and 135a is reduced, and the stones are repelled by the blades 135 and 135a.

The length from the center of the rotating shaft 131 to the ends of the blade brackets 133 and 133a in a state in which the blade brackets 133 and 133a are extended to the blades 135 and 135a as shown in FIG. .

The radius of the wheel 160 is longer than the length from the center of the rotary shaft 131 to the end of the blade brackets 133 and 133a so that the ends of the blades 135 and 135a do not touch the ground, It becomes.

The driving unit 140 is provided at an upper portion of the base unit 110 to provide a driving force for rotating the rotating shaft 131. The driving unit 140 may be provided as an engine. A drive shaft 141 is coupled to an engine (not shown). As shown in FIG. 4, a second bevel gear 143 is provided at an end of the drive shaft 141.

The driving unit 150 transmits the driving force of the driving unit 140 to the cutting unit 130. Here, the driving shaft 141 of the driving unit 140 is positioned in parallel with the rotating shaft 131. The transmission unit 150 includes a transmission shaft 151 disposed vertically between the drive shaft 141 and the rotation shaft 131 and a second bevel gear 143 disposed above and below the transmission shaft 151, And a third bevel gear 152 and a fourth bevel gear 153 that mesh with gears 132, respectively.

The second bevel gear 143 and the third bevel gear 152 are engaged with each other to rotate the transmission shaft 151 and the fourth bevel gear 153 Transmits the driving force to the first bevel gear 132 of the rotating shaft 131. [ As a result, the rotary shaft 131 is rotated, and the plurality of blades 135 and 135a coupled to the rotary shaft 131 rotate to cut the paste.

The second bevel gear 143 and the third bevel gear 152 are housed in the upper transmission housing 158 and the first bevel gear 132 and the fourth bevel gear 153 are housed in the lower transmission housing 159, Lt; / RTI >

Here, the rotation direction of the rotation shaft 131 by the driving of the driving unit 140 is rotated in the direction of the cover 170 from the outside as shown enlarged in Fig. When the rotary shaft 131 is rotated toward the inside of the cover 170, the rotary shaft 131 is directed toward the cover 170 even when the blades 135 and 135a collide with the rotary shaft 135 or 135a. As a result, Can be prevented from being hurt.

The wheel 160 is rotatably coupled to the rotary shaft 131 so as to be rotatable idly so as to be rotated in conjunction with the operation of the handle 120 of the operator regardless of the driving force of the driving unit 140 to move the lawnmower 100.

The wheel 160 is coupled to the rotating shaft 131 by a bearing 161 as shown in FIGS. At this time, a snap ring 167 is inserted between the bearing 161 and the rotating shaft 131 to prevent the bearing 161 from being separated.

Wheel spacers 165 are provided on both sides of the wheel 160 to maintain the spacing of the wheels 160. The bearing 161 is housed inside the bearing housing 163 and the bearing cover 164.

The wheel 160 is designed to have a radius larger than the length from the center of the rotating shaft 131 to the end of the blade brackets 133 and 133a as described above. Thus, when the wheel 160 is moved along the ground, even if the blades 135 and 135a are rotated, they are kept at a constant interval on the ground.

The cover 170 covers the upper portions of the blades 135 and 135a of the cutting portion 130 to prevent a safety accident. Particularly, the pebbles protruding from the ground during the grass cutting operation are prevented from splashing to the pedestrian side by the operator.

The use of the lawn mower 100 according to the present invention having such a configuration will be described with reference to Figs. 1 to 6. Fig.

The operator grasps the handle 120 of the lawn mower 100 as shown in Fig. The blades 135 and 135a of the cutting portion 130 are kept folded down with respect to the blade brackets 133 and 133a as shown in FIG. 5 before the engine (not shown) is driven.

An operator (not shown) of the driving unit 140 drives the operator to remove the grass. The driving force of the engine (not shown) is transmitted to the rotating shaft 131 of the cutting unit 130 through the driving unit 150.

When the rotary shaft 131 is rotated, the blades 135 and 135a are coaxially expanded with respect to the blade brackets 133 and 133a as shown in FIG. 6 by the centrifugal force, and are rotated together with the rotary shaft 131.

When the operator presses the handle 120 in this state, the wheel 160 is rotated by the bearing 161 irrespective of the rotational force of the rotation shaft 131. The base portion 110 is moved in a direction to be operated by the handle 120 and the plurality of blades 135 and 135a of the cutting portion 130 cut the grass.

As described above, in the lawn mower according to the present invention, since the plurality of blades are kept spaced apart from the ground by the wheels, the grass is stably driven without being buried in the soil, and the grass is cut.

In addition, the operator simply presses or pulls the handle, and there is no need to carry the body pipe directly by hand as in the conventional case, so that the physical burden can be significantly reduced.

Further, since the cover is provided on the upper surface of the blade at a predetermined area and the rotary shaft rotates toward the cover direction, even if the pebbles are splashed, they are hit against the cover, thereby preventing the pedestrian or the operator from being injured.

Further, since the blade of the present invention is provided to be folded or unfolded with respect to the blade bracket, if the striking pin strikes the rotating blade, the blade is folded, thereby preventing damage to the blade.

The embodiments of the lawn mower of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. will be. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: lawn mower 110: base part
111: base frame 112: base plate
113: rotation shaft coupling ring 115: cover coupling mount
117: Handle link 118: Handle rotating shaft
120: handle 121: base coupled shaft
130: cutting portion 131:
132: first bevel gear 133, 133a: blade bracket
135,135a: Blade 137: Blade support shaft
140: driving part 141:
143: 2nd bevel gear 150:
151: transmission shaft 152: third bevel gear
153: fourth bevel gear 158: upper motor housing
159: Lower electric motor housing 160:
161: Bearing 163: Bearing housing
164: Bearing cover 165: Wheel spacer
167: Snap ring 170: Cover

Claims (4)

A base portion 110 disposed horizontally;
A handle 120 coupled to the front of the base 110 to adjust the direction of movement of the base 110;
A pair of wheels 160 coupled to the rear of the base 110 to allow the base 110 to move in an adjustment direction of the handle 120;
A rotating shaft 131 coupled to the pair of wheels 160 in a horizontal direction and a rotating shaft 131 coupled to the rotating shaft 131 at regular intervals along the length of the rotating shaft 131, A cutting portion 130 having cutting blades 135 and 135a;
A driving unit 140 provided on an upper surface of the base unit 110;
A driving unit 150 for transmitting driving force of the driving unit 140 to the rotating shaft 131;
And a cover 170 extending from the base portion 110 to cover the upper portion of the cutting portion 130 and protecting the cutting portion 130,
The pair of wheels 160 are idly rotatably coupled to the rotation shaft 131 so as not to receive the rotational force of the rotation shaft 131,
The cutting unit 130 includes:
A plurality of blade brackets 133 and 133a protruding radially outward along the longitudinal direction on the rotary shaft 131;
And blades 135 and 135a rotatably coupled to the blade brackets 133 and 133a by a blade support shaft 137,
The blades 135 and 135a are downwardly folded from the blade brackets 133 and 133a by gravity when the rotating shaft 131 is not rotated. When the rotating shaft 131 rotates, the blade brackets 133 and 133 wherein the grass is unrolled and coaxially rotated with respect to the grass.
The method according to claim 1,
Wherein the plurality of blade supporting shafts (137) are alternately arranged at different angles with respect to the rotating shaft (131).
3. The method of claim 2,
The base 110 includes a handle link 117 protruding forward and coupled to the handle 120 and a pair of axle coupling rings 112, (113)
Wherein the pair of wheels (160) are coupled to the rotating shaft (131) by idle by a bearing (161).
The method of claim 3,
The driving shaft 141 coupled to the driving unit 140 is horizontally positioned on the rotation shaft 131,
The driving unit 150 includes a driving shaft 141 and a driving shaft 151 that is disposed perpendicular to the rotating shaft 131 and has both ends thereof engaged with the driving shaft 141 and the rotating shaft,
Wherein the rotary shaft (131) is rotated in a direction from the outside toward the cover (170).

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