KR101192950B1 - Protect cover and plant cutter employing the same - Google Patents

Abstract

PURPOSE: A grass eliminator and protection cover thereof are provided to improve user convenience for a rolling operation by enabling a user to convert the angle and direction of a main handle unit into the desired direction and angle. CONSTITUTION: A protection plate(210) is combined with a driving shaft. A protrusion unit(213) is separated according to the columnar direction of the protection plate. A bearing unit(240) supports the driving shaft. A flow supporting unit includes an elastic member(271) and a protection pipe(273). The elastic member applies the elastic bias to the protection plate. When the protection plate is flown by the restitution force of the elastic member, the protection pipe prevents the protection plate from being bent. A roller unit(300) is combined in the lower part of the protection plate.

Description

Protective cover and plant cutter employing the same}

The present invention relates to a mower and a protective cover applied thereto, and more particularly, to a mower and a protective cover applied to the lawn mower formed in the ground through a protective plate of the lower blade.

As the mower is used with the blade mounted on the lower part of the rotating shaft of the working rod and exposed to the outside, there is a risk of accidents when a person, including children, unknowingly approaches it. In some cases, the speed at which the blade rotates often caused objects on the ground to bounce off.

In addition, the blade may be bent or broken while colliding with the object during work, there is a fear that the user may cause a second accident, such as missing the work rod due to the impact.

Accordingly, a number of mowers have been disclosed to prevent accidents by providing a safety plate at the bottom of the blade so as to smoothly cut the weeds while protecting the blade like the registered utility model No. 214892.

However, even in the case of the above-mentioned lawn mowers, it was difficult to cut weeds smoothly due to problems such as lowering the rod during work or deterioration of concentration and the safety plate coming into contact with the ground due to the deterioration of concentration. There was a disadvantage that the work efficiency is lowered.

A device for solving this problem is disclosed in Korean Utility Model Registration No. 20-0439951.

However, in the conventional blade protection lawnmower disclosed above, there is a risk that the blade protection plate for protecting the blade receives a rotational force to rotate together by the driving force of the driving motor for rotating the blade.

In addition, Korean Patent Application No. 10-2009-0041732 discloses a protective cover for lawn mowers having a plate rotation support means for supporting the blade to protect the blade so as to rotate at a predetermined angle.

On the other hand, the conventional mowing machine has to work while the user lifts the work rod with the blade spaced apart from the ground, thus increasing the working time because the operator must carry out all the loads from the work rod to the blade. There is a problem that the more work fatigue increases.

The present invention has been made to solve the above problems, to provide a lawn mower and a protective cover applied thereto that can perform the work while distributing the load of the portion extending from the rod to the blade by the rolling motion through the ground There is a purpose.

In order to achieve the above object, the lawn mower protection cover according to the present invention is coupled to the drive shaft to be positioned below the blade to protect the blade installed on the drive shaft of the working rod of the lawn mower and is relatively larger than the rotation diameter of the blade. A protruding portion having a diameter formed to be spaced apart from each other along the circumferential direction to protect the blade; A bearing unit coupled between the protection plate and the drive shaft to support the drive shaft in a rotatable manner relative to the protection plate; A spring member coupled between the protective plate and the working rod and coupled to apply an elastic bias to the protective plate, and extended to surround the spring member so that the protective plate flows by a restoring force of the spring member. A flow support having a protective tube to prevent bending; And a roller unit coupled to the lower portion of the protection plate to enable a rolling motion with respect to the ground.

Preferably the roller unit comprises a lower plate coupled to receive the bearing unit in a closed manner under the protection plate; A support piece protruding downward from the bottom surface of the lower plate to be spaced apart from each other; A roller to be rotatably mounted to the support piece; And an auxiliary foreign matter blocking member extending downward in a direction opposite to the outer circumferential surface of the roller in the lower plate to block foreign matter from entering between the lower plate and the roller on the bottom of the lower plate. Respectively.

In addition, the bearing unit has an inner ring having a hollow hollow, a bearing having an outer ring coupled to the outer ring concentrically concentrically rotatable with respect to the inner ring, and inserted into the hollow of the bearing and the drive shaft of the blade penetrates. An insertion portion having an axial through hole formed therein, an outer diameter of the insertion portion formed at an upper portion of the insertion portion so as to be in close contact with the bottom surface of the cutting blade, and a circular portion drawn toward the center of the lower portion of the lower portion of the insertion portion; Is provided through a mounting groove formed along the main surface to support the inner ring of the bearing inserted into the outer side of the bearing upwardly has a shaft support member having a binding ring for engaging the bearing in the insertion portion.

In addition, in order to achieve the above object, the lawn mower according to the present invention in the lawn mower for rotating the blade coupled to the drive shaft of the working rod by the rotational force transmitted from the power generating unit through the working rod, the blade installed on the drive shaft of the working rod A protective plate coupled to the driving shaft to be positioned below the blade to protect the blade, and having protrusions having a diameter relatively larger than the rotation diameter of the blade to be spaced apart from each other along the circumferential direction to protect the blade; A bearing unit coupled between the protection plate and the drive shaft to support the drive shaft in a rotatable manner relative to the protection plate; A spring member coupled between the protective plate and the working rod and coupled to apply an elastic bias to the protective plate, and extended to surround the spring member so that the protective plate flows by a restoring force of the spring member. A flow support having a protective tube to prevent bending; A roller unit coupled to a lower portion of the protection plate to enable a rolling motion with respect to the ground; A main handle part coupled to the working rod to allow the user to squeeze, wherein the main handle part has a coupling part coupled to the working rod, and a protrusion bar protruding from the coupling part in a direction away from the working rod; A base member; An elastic rod coupled to the protruding rod of the base member to enable length adjustment; It is provided with a handle bar coupled with the upper end of the expansion rod.

In addition, the protrusion rod is formed with a plurality of coupling holes in the circumferential direction and the longitudinal direction to adjust the length and rotation direction of the expansion rod, the expansion rod is slidably inserted with respect to the protrusion rod and coupled with the coupling hole A first coupling piece having a fastening hole for fastening, a first surface treatment portion extending from the upper end of the main body to a narrower width than the main body, and having a first through hole formed therein; A first fixing guide piece protruding radially spaced apart from each other about the first through hole at a first surface treatment portion of the coupling piece, and the handle bar includes a gripping portion extended to allow a user to hold the gripping portion; A second coupling piece having a second surface treatment portion extending in a narrower width than the gripping portion at an end of the second coupling piece, and having a second through hole formed therein; and the second surface treatment portion of the second coupling piece. A second fixing guide piece which is radially spaced apart from each other about the second through hole and is formed to enter between the first fixing guide pieces so as to adjust a fixed angle of the gripping portion with respect to the elastic rod; And, it is preferable to have a fixing member for coupling the expansion rod and the handle bar through the first through hole and the second through hole.

According to the lawn mower according to the present invention and the protective cover applied thereto, the roller coupled to the lower portion of the protective plate enables the rolling motion through the ground to reduce the load burden required for the operator's work, the main provided on the working rod It can be used by adjusting the handle in the desired direction and angle provides an advantage that the user's convenience for the cloud movement.

1 is a perspective view showing a lawn mower with a protective cover according to the present invention,
Figure 2 is an exploded perspective view showing a part of the protective cover of the lawn mower of Figure 1 separated,
3 is a cross-sectional view of the protective cover for lawn mowers of FIG.
4 is a cross-sectional view cut at different angles of the protective cover for lawn mowers of FIG.
5 is an exploded perspective view illustrating the main handle part coupled to the working rod of the lawn mower of FIG. 1.

Hereinafter, with reference to the accompanying drawings will be described in more detail a lawn mower and a protective cover applied thereto according to a preferred embodiment of the present invention.

1 is a perspective view showing a lawn mower according to the present invention, Figure 2 is an exploded perspective view showing a part of the protective cover of the lawn mower of Figure 1, Figure 3 is a cross-sectional view of the protective cover of the lawn mower of Figure 1, 4 is a cross-sectional view cut at different angles of the protective cover of the lawn mower of FIG.

1 to 4, the lawn mower 100 includes a power generating unit 110, a blade 150, and a protective cover 200.

The power generating unit 110 generates power to transmit rotational force to the drive shaft 160 of the blade 150 mounted on the working rod 140.

The power generator 110 includes a main frame 112, an engine 120, and a power transmission unit.

The main frame 112 is configured to mount the backrest 114 and the engine 120.

The engine 120 is configured to rotate the main rotating shaft (not shown) through the connecting rod (not shown) by the reciprocating motion of the piston (not shown), and the power transmission unit is connected to one end of the main rotating shaft of the engine 120. It is connected so that the rotational force of the main rotating shaft can be transmitted to the drive shaft of the blade 150.

The power transmission unit includes a working rod 140, a flexible tube 135 connected between the working rod 140 and the engine 120, and a working rod (through the flexible tube 135 and the working rod 140 from one end of the main rotating shaft). 140 is a power transmission wire (not shown) for transmitting a rotational force to the blade 150 coupled to the drive shaft 160 protruding downward at the bottom.

The structure of such a power generation unit is well known, and thus a detailed description thereof will be omitted.

On the other hand, unlike the illustrated example, the power generating unit rotates the motor using power, and the method of shearing the rotational force of the motor with the power transmission wire may be applied.

The lower end of the working rod 140 is mounted to the blade 150 and the protective cover 200 coupled to the drive shaft 160.

The protective cover 200 has a structure having a protective plate 210, a bearing unit 240, a flow support 270, and a roller unit 300.

The protection plate 210 is supported by the bearing unit 240 and the flow support part 270 which will be described later is mounted on the lower portion of the blade 150 mounted on the work rod 140 end.

The protection plate 210 has a structure having a base portion 211 having a through hole 214 formed therein, and a protrusion 213 protruding radially spaced apart from the base portion 211.

The diameter of the base portion 211 is formed shorter than the diameter of the blade 150, the length of the protrusion 213 is formed relatively longer than the blade 150. The protection plate 210 serves to protect the blades so that obstacles such as gravel of the ground interfere with the protection plate 210 rather than the blade 150, and the inlet grooves 217 between the protrusions 213 are provided. The area provides an area for cutting the grass by the blade 150.

The base part 211 is formed from the upper contact part 211a and the upper contact part 211a formed to be in close contact with the upper surface of the outer ring 241b of the bearing 241 which will be described later with the through hole 214 formed in the center. After the inclined portion 211b formed to be inclined downward in the direction in which the outer diameter extends, the horizontal portion 211c extending horizontally from the end of the inclined portion 211b, and drawn downward from the end of the horizontal portion 211c, It has a structure with the bone formation part 211d extended horizontally.

Reference numeral 213a is coupled to the flow support 270 which will be described later and is bent upward to the coupling protrusion formed in a shape in which the outer diameter is expanded than the other protrusion 213.

The bearing unit 240 is coupled between the blade 150 and the protective plate 210 to rotatably support the drive shaft 160.

The bearing unit 240 includes a bearing 241 and the shaft support member 250.

The bearing 141 has a structure having an inner ring 241a having a hollow hollow 242 and an outer ring 241b coupled to the outside of the inner ring 241a concentrically rotatably with respect to the inner ring 241a. .

The bearing 241 may be applied to various types of bearings such as a ball bearing in which the inner ring 241a and the outer ring 241b are interconnected by a ball (not shown) that is a rolling body.

Shaft support member 250 is formed so that the drive shaft 160 can be inserted is inserted into the hollow 242 of the bearing 241 'T' to support the protective plate 210 in the upper and lower portions of the protective plate 210 It is formed in the shape of a child, and when it is divided into an insertion part 252, the support part 256, and the binding ring 281.

Insertion portion 252 is a portion that is fitted to the hollow 242 of the bearing 241 is formed longer than the thickness of the bearing 241 and the shaft through-hole 253 is formed so that the drive shaft 160 of the blade 150 penetrates have.

The support part 256 is formed integrally with the inserting part 252, and is formed to extend horizontally so that the outer diameter of the inserting part 252 is extended than the inserting part 252. It is a close part.

The binding ring 281 is mounted through the mounting groove 254 formed along the circumferential surface of the binding ring 281 so as to be drawn toward the center of the lower portion of the lower portion of the insertion portion 252 and inserted into the outer portion of the insertion portion 252. Elastically supports the inner ring 241a upward and binds to the insertion portion 252.

The binding ring 281 is formed in an annular shape, and the 'O'-shaped annular portion 281a whose end is cut and protrudes in the direction in which the outer diameter extends to the end of the annular portion 281a, respectively, is upward with respect to the annular portion 281a. It is formed in a rectangular shape to be inclined to form a shape having two inclined support pieces 281b to elastically support the lower portion of the inner ring 241a of the bearing 241 upward.

The binding ring 281 is inclined support when coupled through the mounting groove 254 of the insertion portion 252 of the shaft support member 250 with respect to the bearing 241 mounted to the lower portion of the protective plate 210 during the assembly process The piece 281b interferes downwardly by the lower portion of the inner ring 241a of the bearing 241 and elastically supports the lower portion of the inner ring 241a of the bearing 241 upwardly so that the inner ring 241a and the insertion portion 252 are separated. Strengthen the bond.

The first foreign matter blocking member 261 is introduced into the bearing 241 of the foreign matter introduced through the protection plate 210 and the blade 150 and the shaft support member 250 in a state where the protection plate 210 is assembled. It is coupled to the upper surface of the protective plate 210 to surround the outer ring 241b of the bearing 241 along the circumferential direction in the upper portion of the protective plate 210 to block the.

The first foreign matter blocking member 261 includes a first flange portion 261a that is detachably coupled to a top surface of the horizontal portion 211c of the protective plate 210 through a fastening member such as a bolt, and a first flange portion 261a. ) Is formed in a shape having a cylindrical portion 261b protruding upward from the inner circumferential surface to face the outer ring 241b of the bearing 241 but having a height lower than that of the bearing 241.

In addition, the second foreign matter blocking member 271 is horizontal of the protection plate 210 so as to support the outer ring 241b of the bearing 241 while blocking the inflow of foreign matters from the lower portion of the protection plate 210 to the bearing 241. The bottom of the portion 211c is detachably coupled through a fastening member such as a bolt, and is formed in a shape surrounding the lower portion of the bearing 241 while supporting the outer ring 241b of the bearing 241.

The second foreign matter blocking member 271 may include a second flange portion 271a coupled to the bottom of the horizontal portion 211c of the protection plate 210 and an outer ring 241b of the bearing after extending downward from the flange portion 271a. The end is bent to the center portion to form the through-hole 273 has a cup-shaped body portion 271b formed to be spaced apart from the inner ring 241.

The flow support 270 is formed to allow the partial rotation of the protection plate 210 when the blade 150 rotates, but the protrusion 213a for coupling of the protection plate 210 to block the allowance of rotation over a predetermined angle is formed. A spring member 271 coupled between the hole and the fixing bracket 275 of the working rod 140 and coupled to apply an elastic bias to the protective plate 210, and extended to surround the spring member 271. The plate 210 has a structure having a protective tube 273 that prevents the plate 210 from being bent when flowing by the restoring force of the spring member 271.

Here, the protective tube 273 is to protect the spring member 171 and at the same time maintain the separation distance between the protective plate 210 and the blade 150 at a predetermined distance to rotate the protective plate 210 by a predetermined angle spring member In the process of returning to the initial position by the restoring force of the 271, even when the attractive force of the spring member 271 acts too large, the one side of the protective plate 210 connected with the spring member 271 is prevented from being lifted upward to protect the One side of the plate 210 is prevented from being deformed.

The roller unit 300 is coupled to the lower portion of the protection plate 210 to enable the rolling motion of the ground.

The roller unit 300 is coupled to the lower portion of the protective plate 210 so that the second foreign matter blocking member 271 of the protective plate 210 is accommodated therein.

The roller unit 300 includes a lower plate 310, a support piece 320, a roller 330, and an auxiliary foreign matter blocking member 340.

The lower plate 310 is formed in a concave shape at a lower portion of the lower plate 310 to accommodate the bearing unit 240 and the second foreign matter blocking member 271 at the lower portion of the protective plate 210. 211d) and bolts and nuts through the fastening holes.

The lower plate 310 is recessed portion 311b formed downwardly from the flange portion 311a and the flange portion 311a in close contact with the bone forming portion 211d of the protective plate 210 and formed at an end of the recessed portion. It has a structure which has the sea part 311c formed flat.

Unlike the illustrated example, the lower plate 310 may omit the second foreign matter blocking member 271, and may be formed to be coupled to the protection plate 210 while supporting the bearing 241 at the bottom.

The support piece 320 protrudes downward from the bottom of the bottom portion 311c of the lower plate 310 to be spaced apart from each other.

The roller 330 is formed in a cylindrical shape and rotatably mounted to the support piece 320.

The auxiliary foreign matter blocking member 340 is a line connecting the rotation center of the roller 330 at the lower plate 310 to block foreign matter from entering between the lower plate 310 and the roller 330 at the bottom of the lower plate 310. It is formed to be bent downward in a direction opposite to the outer circumferential surface of the roller 330 along one side with respect to the center.

In order to improve the user's workability when working while rolling the roller 330 on the ground, the working rod 140 is provided with a main handle 350 which can be coupled to the working rod to allow the user to grasp and FIG. 5. Reference is made together.

The main handle portion 350 is composed of a base member 360, an extension rod 370, and a handle rod 380.

The base member 360 has a structure having a coupling part 361 that is wound around and fixed to the working rod 140, and a protruding rod 365 protruding from the coupling part in a direction away from the working rod 140.

Coupling portion 361 is formed in a semi-circular shape of a string dividing the circle so that the work rod 140 can be wrapped by the coupling, respectively, and the first and second coupling portions 361a and 361b having coupling ribs formed at ends thereof. have.

Protruding bar 365 is formed in the form of a cylindrical tube extending upward from the center of the first coupling portion (361a) and the circumferential direction and the longitudinal direction to adjust the length and rotation direction of the elastic rod 370 described later on the outer peripheral surface As a result, a plurality of coupling holes 365a are formed.

The elastic rod 370 is formed in a tubular shape so that the elastic rod 370 can be inserted from the protruding rod 365 of the base member 360, and the length of the elastic rod 370 is adjustable.

The elastic rod 370 is slidably inserted in the longitudinal direction from the outside with respect to the protruding rod 365, and the main body 371, the main body (371) having a fastening hole 372 for engaging with the coupling hole (365a) A first coupling piece 374 having a first surface treatment portion 375 extending in a narrower width than the main body 371 upward from an upper end of the 371 and having a first through hole 376 formed therein; The first surface treatment portion 375 of the piece 374 has a structure having a first fixing guide piece 377 protruding radially spaced apart from each other about the first through hole 376.

The handle bar 380 is coupled to the first coupling piece 374 that is the upper end of the elastic bar 370 and the angle adjustment is possible.

The handle bar 380 has a gripping portion 381 extending to be gripped by a user, and a second surface treatment portion 385 extending narrower than the gripping portion 381 at the end of the gripping portion 381. And radially spaced from the second coupling piece 384 having the second through hole 386 and the second through hole 386 centered on the second surface treatment portion 385 of the second coupling piece 384. The second fixing guide piece 387 is formed so as to be entered between the first fixing guide piece 377 and to adjust the fixed angle of the gripping portion 381 with respect to the elastic rod 370. .

The handle bar 380 is a first through-hole coaxially aligned in a state in which the second fixing guide piece 387 is inserted into the first fixing guide piece 377 such that the elastic bar 370 has a desired angle. The 339 and the second through hole 386 may be coupled using a bolt 391 and a nut 392 as fixing members.

Of course, reference numeral 398 may be omitted as an auxiliary handle.

This mowing machine is to hold the gripping portion 381 in the state in which the gripping portion 381 is adjusted to a desired direction at right angles or side by side with respect to the working rod 140, and the roller 330 is to perform a rolling motion on the ground. This provides the advantage that the burden on the workload is mitigated.

210: protection plate 240: bearing unit
241: bearing 250: shaft support member
330: roller 350: main handle portion

Claims (6)

In order to protect the blade installed on the drive shaft of the working blade of the lawn mower, combined with the drive shaft to be located below the blade, the protrusions having a diameter relatively larger than the rotation diameter of the blade is formed to be spaced apart from each other along the circumferential direction A protection plate protecting the;
A bearing unit coupled between the protection plate and the drive shaft to support the drive shaft in a rotatable manner relative to the protection plate;
A spring member coupled between the protective plate and the working rod and coupled to apply an elastic bias to the protective plate, and extended to surround the spring member so that the protective plate flows by a restoring force of the spring member. A flow support having a protective tube to prevent bending; And
And a roller unit coupled to a lower portion of the protective plate to enable a rolling motion with respect to the ground. The method of claim 1, wherein the roller unit
A lower plate coupled to receive the bearing unit in a closed manner under the protection plate;
A support piece protruding downward from the bottom surface of the lower plate to be spaced apart from each other;
And a roller to be rotatably mounted to the support piece. According to claim 2, A secondary foreign matter blocking member extending downward bent in a direction opposite to the outer circumferential surface of the roller in the lower plate to block foreign matter entering between the lower plate and the roller on the bottom surface of the lower plate; Protective cover for mower, characterized in that it further comprises. The method of claim 3, wherein the bearing unit
An inner ring having a hollow hollow, a bearing having an outer ring coupled to the outer ring concentrically rotatably with respect to the inner ring, and an axial through hole inserted into the hollow of the bearing and through which a drive shaft of the blade passes And an upper portion of the insert portion, which has an outer diameter greater than that of the insert portion, a support portion in close contact with the bottom surface of the blade cutter, and a mounting groove formed along the circumferential surface to be drawn toward the center direction on the outer surface of the lower portion of the insert portion. Protective cover for a lawnmower, characterized in that it comprises a shaft support member having a binding ring mounted through the elastically upwardly elastically supporting the inner ring of the bearing inserted into the outer portion of the insertion portion to the insertion portion. . In the mower for rotating the blade coupled to the drive shaft of the working rod by the rotational force transmitted from the power generating unit,
In order to protect the blade installed on the drive shaft of the working rod is coupled to the drive shaft to be located below the blade and the protrusions having a diameter relatively larger than the rotation diameter of the blade is formed to be spaced apart from each other along the circumferential direction A protective plate for protecting;
A bearing unit coupled between the protection plate and the drive shaft to support the drive shaft in a rotatable manner relative to the protection plate;
A spring member coupled between the protective plate and the working rod and coupled to apply an elastic bias to the protective plate, and extended to surround the spring member so that the protective plate flows by a restoring force of the spring member. A flow support having a protective tube to prevent bending; And
A roller unit coupled to a lower portion of the protection plate to enable a rolling motion with respect to the ground;
It is provided with a; main handle portion which is coupled to the working rod can be grasped by the user,
The main handle portion
A base member having a coupling part coupled to the working rod, and a protrusion bar protruding from the coupling part in a direction away from the working rod;
An elastic rod coupled to the protruding rod of the base member to enable length adjustment;
A mower, comprising: a handle bar coupled with an upper end of the elastic rod. According to claim 5, The protruding rod is formed with a plurality of coupling holes in the circumferential direction and the longitudinal direction to adjust the length and rotation direction of the expansion rod,
The telescopic rod is slidably inserted with respect to the protruding rod and includes a main body having a fastening hole for engaging with the coupling hole, and a first surface treatment portion extending upward from a top of the main body in a narrower width than the main body. A first coupling piece having a first through hole and a first fixing guide piece protruding radially spaced apart from each other radially about the first through hole at a first surface treatment portion of the first coupling piece;
The handle bar is
A second coupling piece having a gripping portion extended to be gripped by a user, a second surface treatment portion extending at a narrower width than the gripping portion at the end of the gripping portion, and having a second through hole formed therein; The second surface treatment portion of the coupling piece is radially spaced apart from each other about the second through-hole and is formed so as to enter between the first fixing guide piece to adjust the fixed angle of the gripping portion relative to the elastic rod. With a second fixing guide piece
Mowers, characterized in that provided with a fixing member for coupling the elastic rod and the handle bar through the first through hole and the second through hole.

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