KR20230000091A - Foldable Brush Cutter - Google Patents

Abstract

The present invention relates to a brush cutter used for cutting grass, and more particularly, to a foldable brush cutter which can be folded and unfolded without a separate tool so as to reduce the volume during storage or transportation. The foldable brush cutter of the present invention includes a blade part, a driving part, a power supply part, a connecting rod, and a folding part, wherein the connecting rod includes a first connecting rod and a second connecting rod, and the folding part includes a hinge coupling part and a locking part.

Description

Foldable Brush Cutter}

The present invention relates to a brush cutter used for cutting grass, and more particularly, to a foldable brush cutter capable of being folded and unfolded without a separate tool to reduce its volume during storage or transportation.

A mower is a device used to cut grass. It is a rotary mower that removes cut objects by rotating saw teeth or blades, and a rotary mower that removes cut objects flowing between saw teeth by reciprocating linear motion of one of a pair of saw blades. It can be classified as a reciprocating mower.

[0002] In general, a rotary lawn mower having a simple structure and a small volume is mainly used for cutting work, and is divided into an engine-driven method and a battery-driven method according to a driving source. In the case of the engine-driven method, it has the advantage of obtaining strong power by the piston movement according to fuel ignition and being able to use it for a long time with one fuel injection, but the engine is heavy and generates engine noise and smoke during operation.

Recently, in order to improve this, the use of a battery-powered lawn mower that is equipped with a rechargeable battery and rotates saw teeth or blades by driving an electric motor using battery power has been increasing. In the case of a battery-powered lawnmower, there are advantages of light weight, low operating noise, and no emission of smoke.

1 is a perspective view of a conventional battery-powered rotary mower.

As shown in the figure, the mowing machine has a work rod 10 with a driving shaft installed therein, and a blade 20 connected to the driving shaft at the lower end of the work rod 10 rotatably installed, and a drive shaft at the upper end of the work rod 10. It may be configured to include a body 40 in which a motor and a battery for rotating are accommodated.

As described above, since the length of the work rod 10 is long, it is not easy to move or store, and especially it is impossible to load in a small vehicle, so the work rod 10 is configured as a detachable type, and separation and assembly must be repeated as necessary. There is a romance.

Publication No. 10-2021-0051871 (published on May 10, 2021)

The present invention has been made to solve the above problems, and an object of the present invention is to configure the connecting rod connecting the body and the blade to be foldable so that the connecting rod can be folded and unfolded during movement and storage, thereby reducing the length of the mower. It is to provide a folding mower that can be reduced.

In addition, the foldable mower is configured to be locked and unlocked in a lever touch method so that the mower is easily locked or unlocked when the mower is folded.

In addition, the present invention provides a folding lawnmower to which an injury prevention member is applied so that a certain or more force is applied to prevent a user from being injured by a blade when folding.

Another aspect of the present invention is to provide a folding lawn mower having a damage preventing protrusion on a folding portion to prevent damage to a power supply wire installed inside the connecting rod due to the folding portion.

The foldable lawnmower of the present invention includes a blade unit that cuts an object to be cut by rotation, a driving unit connected to the blade unit and rotating the blade unit, and a power unit disposed at a rear side of the driving unit and supplying power to the driving unit. and a connecting rod having a front side connected to the blade and the drive unit and a rear side connected to the power supply unit, wherein the connecting rod includes: a first connecting rod having a rear side connected to the power supply unit; and a second connecting rod disposed on a front side of the first connecting rod and having a front side connected to the blade and the drive unit, wherein the mower includes the first connecting rod and the second connecting rod so that the connecting rod is folded or unfolded. Includes a folding portion provided on the connecting rod, wherein the folding portion includes: a hinge coupling portion that hinges a front end of the first connecting rod 510 and a rear end of the second connecting rod 520; and a locking portion that locks the hinge coupling portion so that the connecting rod maintains an unfolded state or releases the locking state of the hinge coupling portion so that the connecting rod is folded.

In addition, when the side on which the cutting surface is formed by the blade portion is defined as the lower side opposite to the upper side, the hinge coupling portion is formed below the first and second connecting rod coupling portions, and the locking portion is formed on the lower side of the first and second connecting rod coupling portions. 2 It is formed on the upper side of the connecting rod coupling part.

In addition, the locking portion, a lever fixing portion protruding upward from the front end of the first connecting rod 510; a ring fixing part protruding upward from the rear end of the second connecting rod 520 and contacting the lever fixing part 120 when the mowing machine 1000 is unfolded; A fixed lever whose front end is hinged to the lever fixing part so that the rear end rotates with the lever fixing part as a hinge axis; The rear side end is hinged to the fixed lever to engage the ring fixing part to couple the lever fixing part and the ring fixing part, or release the ring fixing part to release the coupling of the lever fixing part and the ring fixing part. A fixing ring coupled to the front end of which rotates with the fixing lever as a hinge axis, wherein the fixing ring is engaged in or released from the ring fixing part by the rotation of the front hinge of the fixing lever, When the fixing ring is hooked to the ring fixing part by rotation of the rear side hinge of the fixing lever, the fixing ring is pressed to the rear side to maintain the hooked state.

In addition, the mowing machine includes a separation prevention rib protruding forward from an upper end of the ring fixing part to prevent separation due to an upward movement of the fixing ring when the fixing ring is locked.

In addition, the mowing machine includes an injury prevention member provided in the hinge coupling portion so that the connecting rod is folded or unfolded only when a certain load is applied when the locking portion is released, and applies elasticity to the hinge coupling portion in an axial direction, and , It is characterized in that the injury prevention member is a wave washer provided in the hinge coupling part.

In addition, inside the connecting rod, a wire for transmitting power of the power supply unit and the control signal of the driving unit to the driving unit is installed, guides the folding of the wire when the connecting rod is folded, and protects the wire. The hinge coupling part On the upper side, a damage preventing protrusion is formed, and the front side of the damage preventing protrusion is formed on the inner surface of the front end of the first connecting rod, protrudes upward from the lower side, and the rear side is formed on the rear end of the second connecting rod. It is formed on the inner surface, protrudes upward from the lower side, and when the connecting rod is folded, protrudes in a semicircular shape outside the coupling part of the first and second connecting rods so that the wires come into contact with each other in a circumferential direction.

The foldable mower of the present invention according to the configuration described above has the effect of being able to load even a small vehicle when moving because the length can be reduced because the connecting rod can be folded.

In addition, there is an effect of enabling easy folding or unfolding with little force by allowing the folding part to be locked and unlocked through the one-touch lever.

In addition, it is configured to be folded only when a certain force is applied, so that there is an effect of preventing a user's injury due to unintentional folding when the folding part is loosened.

In addition, there is an effect of improving durability by preventing the wire installed inside the connecting rod from being damaged due to the folding portion.

1 is an overall perspective view of a general rotary lawn mower
2 is an overall perspective view of a folding lawn mower according to an embodiment of the present invention;
3 is a partially enlarged perspective view of a brushcutter showing a folding part according to an embodiment of the present invention;
4 is a cross-sectional view of a folding part according to an embodiment of the present invention
Figure 5a is a plan view of the foldable part according to an embodiment of the present invention (when locked)
Figure 5b is a plan view of the foldable part according to an embodiment of the present invention (when locked)
6 is an overall perspective view of a folding mower according to an embodiment of the present invention when folded;

Hereinafter, an embodiment of the present invention as described above will be described in detail with reference to the drawings.

2 is an overall perspective view of a foldable lawnmower 1000 (hereinafter referred to as 'grassmower') according to an embodiment of the present invention. As shown, the mower 1000 may be largely composed of a folding part 100, a blade part 200, a driving part 300, a body part 400, and a connecting rod 500, and the body part 400, It may consist of a handle part 410 and a power supply part 420, and may further include a protective cover 205, a switch 405, and an auxiliary handle 505 as detailed configurations.

As the blade unit 200, a conventional rotary double blade or disc-shaped toothed blade that cuts grass by rotation may be applied. An electric motor may be applied to the drive unit 300 as a configuration for rotating the blade unit 200 by being rotated by power. In the case of a portable lawnmower, a rechargeable DC battery is mainly used, so the driving unit 300 may be, for example, a DC motor. The handle part 410 is a part that the user grips to use the mower 1000, and is disposed at a predetermined distance from the blade part 200 through the connecting rod 500, and is a position where power on/off and output control can be performed in a gripped state. A switch 405 may be provided. When the position where the blade part 200 is formed is defined as the rear end, the position where the handle part 410 is formed is defined as the rear end, and the power supply unit 420 is disposed at the rear end of the handle part 410 . As described above, a rechargeable DC battery may be applied to the power supply unit 420 in the case of a portable lawnmower, and the power supply unit 420 may be detachably attached to the handle unit 410 for convenience of charging and extension of use time. Therefore, when the battery is discharged, the power supply unit 420 may be detached and charged, or another fully charged battery may be replaced and reused quickly. The connecting rod 500 is made in the form of a rod connecting the blade part 200 and the handle part 410, has a hollow inside, and receives power from the power supply unit 420 and control signals from the switch 405. A wire (not shown) for transmission to the drive unit 300 may be installed inside. The protective cover 205 is spaced apart from the blade 200 and is configured to surround the rear side of the blade 200 . Therefore, when the blade unit 200 rotates, the user is prevented from being injured due to the rotation of the blade unit 200, and debris generated during mowing, that is, cut grass or stones impacted by the blade, is prevented from bouncing to the user. The switch 405 is disposed adjacent to the handle part 410, transmits or cuts off the power of the power supply unit 420 to the driving unit 300 by a user's manipulation, and controls the current of the power supply unit 420 during driving to drive the driving unit. It plays a role of power switching and current amount control so that rotation speed of 300 can be adjusted. The auxiliary handle 505 is provided on the connecting rod 500 so that the user can easily control the direction of the mower 1000 by holding the handle 410 with one hand and holding the handle 410 with the other hand.

The brush cutter 1000 having the above structure includes a foldable portion 100 to reduce the length (volume) of the brush cutter 1000 and facilitate loading during movement or storage. The folding portion 100 is provided at the center of the connecting rod 500 to allow the connecting rod 500 to be folded by unwinding and to maintain the unfolded state of the connecting rod 500 by being locked. Therefore, when folded, the length of the brush cutter 1000 can be reduced by half, making it easy to move or store the brush cutter 1000.

Hereinafter, the detailed configuration, shape, and coupling structure of the folding unit 100 as above will be described in detail with reference to the drawings.

3 is a partially enlarged perspective view of the lawnmower 1000 showing the folding portion 100 according to an embodiment of the present invention, and FIG. 4 is a partially enlarged perspective view of the lawnmower 1000 showing the folding portion 100 A cross section is shown.

As shown, the folding part 100 includes a hinge coupling part 110, a lever fixing part 120, a ring fixing part 130, a fixing lever 140, and a fixing ring 150. In addition, the connecting rod 500 has a hollow portion 501 in which a wire is accommodated, a first connecting rod 510 connected to the body portion 400 for folding, and a second connecting rod connected to the blade portion 200. (520) may be formed separately.

The hinge coupling part 110 is configured to hinge-couple the front end of the first connecting rod 510 and the rear end of the second connecting rod 520 . Therefore, the first connecting rod 510 and the second connecting rod 520 may be configured to be folded or unfolded by hinge rotation based on the hinge coupling part 110 . The hinge coupling part 110 may be formed on the upper or lower side of the connecting rod 500, and preferably, when the mowing machine 1000 is folded, the mowing surface of the blade part 200 is folded so as to face the body part 400 side. It may be formed on the lower side of the connecting rod 500. When the mowing surface of the blade unit 200 is folded to face the outside, this is to prevent injury to the user or scratch or breakage of the loading unit during storage or movement.

On the side opposite to the side where the hinge coupling part 110 is formed, the folding part 100 is locked so that the connecting rod 500 maintains an unfolded state, or the folding part 100 is locked for folding of the connecting rod 500. The locking parts 120, 130, 140, and 150 for release and release are provided. The locking unit includes the aforementioned lever fixing unit 120, the ring fixing unit 130, the fixing lever 140 and the fixing ring 150.

The lever fixing part 120 protrudes upward from the front end of the first connecting rod 510, and is configured such that the lever 140 is hinged. The ring fixing part 130 protrudes upward from the rear end of the second connecting rod 520 and is configured to come into contact with the lever fixing part 120 when the mowing machine 1000 is unfolded. The ring fixing part 130 is configured to lock or unlock the fixing ring 150 and locks the foldable part 100 so that the connecting rod 500 maintains an unfolded state when the fixing ring 150 is caught.

The fixed lever 140 is configured such that a front side end is hinged to the lever fixing part 120 so that the rear end is rotatable with the lever fixing part 120 as a hinge axis. The fixing lever 140 is coupled with a fixing ring 150 that is engaged or released by the ring fixing part 130, and the fixing ring 150 is connected to the ring fixing part 130 by the rotation of the front side hinge of the fixing lever 140. When the fixing ring 150 is caught on the ring fixing part 130 by the rotation of the rear side hinge of the fixing lever 140, the fixing state is maintained to lock the folding part 100. Press the ring 150 to the rear side. The fixing ring 150 has a rear end hinged to the fixing lever 140 so that the front end is rotatable with the fixing lever 140 as a hinge axis. At this time, when the fixing lever 140 pivots to the front side, the front end of the fixing ring 150 also moves forward, and when the fixing lever 140 pivots to the rear side, the front end of the fixing ring 150 also moves to the rear. will move to Therefore, when the fixing lever 140 moves to the front side, the front end of the fixing ring 150 is separated from the ring fixing part 130 and can be unlocked or locked from the ring fixing part 130 by hinge rotation. And, when the front end of the fixing ring 150 is moved upward, it is configured to be unlocked and locked when moved downward.

That is, when the fixing ring 150 moves upward while the fixing lever 140 moves forward, the first and second connecting rods 510 and 520 become foldable and the fixing ring 150 moves downward. When the fixing lever 140 is moved to the rear side in the moved state, the unfolded state of the first and second connecting rods 510 and 520 can be locked.

Referring to FIG. 4 , a first hinge coupling hole 121 for hinge coupling with the fixed lever 140 may be formed in the lever fixing part 120, and in the fixed lever 140, the fixing ring 150 and A second hinge coupling hole 141 for hinge coupling of may be formed. Therefore, by the hinge rotation of the fixing lever 140, the second hinge coupling hole 141 is also hingedly rotated with the first hinge coupling hole 121 as a rotation axis, and when the second hinge coupling hole 141 moves toward the front side, In conjunction, the front end of the fixing ring 150 also moves forward so that the fixing ring 150 can be locked or unlocked from the ring fixing part 130. In addition, when the second hinge coupling hole 141 is moved to the rear side by the rotation of the hinge of the fixing lever 140, the front end of the fixing ring 150 also moves rearward in conjunction therewith, so that the fixing ring 150 moves to the ring go When the top part 130 is in a locked state, the folding part 100 is maintained in a locked state by pressing the fixing ring 150 toward the rear side. In addition, a separation prevention rib 135 may be formed at an upper end of the ring fixing part 130 to prevent separation due to upward movement of the fixing ring 150 when the fixing ring 150 is locked. The release prevention rib 135 may protrude from the upper end of the fixing ring 130 toward the front side.

In addition, an injury prevention member 160 may be provided on the hinge coupling part 110 . The injury prevention member 160 is a blade part 200 when the mower 1000 is unintentionally folded by a user due to gravity or the like in a state in which the foldable part 100 is in a loosened state and the first and second connecting rods 510 are foldable. ) is configured to prevent injury from collision with the back. For example, the injury prevention member 160 may be a washer provided at the hinge coupling portion 110, and more specifically, by applying elasticity in the axial direction of the hinge coupling portion 110, the first and second connecting rods 510 are Even in a foldable state, the mower 1000 may be a wave washer configured to be foldable only when a certain load is applied. Therefore, accidental folding of the mower 1000 can be prevented through the injury prevention member 160, and folding or unwinding can be stopped when a load is removed while the mower 1000 is being folded or unfolded.

5A shows a plan view of the foldable part 100 according to an embodiment of the present invention when it is locked, and FIG. 5B shows a plan view of the foldable part 100 when it is released according to an embodiment of the present invention.

As shown in FIG. 5A, when the fixing lever 140 is moved to the rear side by the hinge rotation of the fixing lever 140 in a state where the fixing ring 150 is engaged with the ring fixing part 130, the fixing ring ( The front side end of 150 also moves rearward and presses the fixing ring 150 rearward to firmly maintain the hooked state with the ring fixing part 130 so that the mower 1000 is locked in the unfolded state. .

As shown in FIG. 5B, when the fixing lever 140 is moved to the rear side by the hinge rotation of the fixing lever 140 in a state in which the fixing ring 150 is released from the ring fixing part 130, the fixing ring ( The front side end of 150 is also moved rearward so that the fixing ring 150 maintains a disengaged state with the ring fixing part 130 and the mower 1000 is configured to be in a foldable state.

6 shows an overall perspective view of the foldable mower 1000 according to an embodiment of the present invention when it is folded. As shown, when the first connecting rod 510 is pressed in a counterclockwise direction or the second connecting rod 520 is pressed in a clockwise direction while the foldable part 110 is foldable, the connecting rod 500 is in a folded state and the mower 1000 length can be reduced.

At this time, a wire (not shown) for transmitting power and control signals from the power supply unit 420 to the drive unit 300 is installed inside the connecting rod 500, and when the mowing machine 1000 is folded, the first and second connecting rods 510 In order to prevent the wire from being damaged due to the sharp end of the , 520, a damage preventing protrusion 115 may be formed on the hinge coupling part 110.

The damage prevention protrusion 115 has a front side formed on the inner surface of the front end of the first connecting rod 510, may protrude upward from the lower side, and has a rear side on the inner surface of the rear end of the second connecting rod 520. It is formed in, and may protrude upward from the lower side.

In addition, the damage prevention protrusion 115 protrudes to the side where the wire is exposed on the hinge coupling part 110 when the connecting rod 500 is folded, and protrudes in a semicircular shape to minimize damage even if the wire touches. . Therefore, when the mowing machine 1000 is folded, the wire exposed at the coupling end of the first and second connecting rods 510 and 520 is configured to come into contact with the damage prevention protrusion 115, which may cause damage to the wire when it comes into contact with a sharp part. is configured to minimize

Technical ideas should not be interpreted as being limited to the above-described embodiments of the present invention. Not only the scope of application is diverse, but also various modifications and implementations are possible at the level of those skilled in the art without departing from the gist of the present invention claimed in the claims. Therefore, such improvements and changes fall within the protection scope of the present invention as long as they are obvious to those skilled in the art.

1000: Folding mower
100: folding part
110: hinge joint 115: damage prevention protrusion
120: lever fixing part 121: first hinge coupling hole
130: ring fixing part 135: separation prevention rib
140: fixed lever 141: second hinge coupling hole
150: fixed ring
160: injury prevention member
200: blade part
205: protective cover
300: driving unit
400: body part
405: switch
410: handle part
420: power supply
500: connecting rod
501: hollow part
505: auxiliary handle
510: first connecting rod
520: second connecting rod

Claims (7)

A blade part that cuts the object to be cut by rotation, a drive part connected to the blade part and rotating the blade part, a power supply part spaced apart from each other on the rear side of the drive part and supplying power to the drive part, and a front side of the blade part and a connecting rod connected to the driving unit and having a rear side connected to the power supply unit,
The connecting rod is
a first connecting rod, the rear side of which is connected to the power supply unit; and
A second connecting rod disposed on a front side of the first connecting rod and having a front side connected to the blade part and the driving part,
The mowing machine,
A folding portion provided on the first connecting rod and the second connecting rod so that the connecting rod is folded or unfolded,
The folding part,
a hinge coupling portion that hinge-couples the front end of the first connecting rod 510 and the rear end of the second connecting rod 520; and
a locking unit that locks the hinge coupling portion so that the connecting rod maintains an unfolded state or releases the locking state of the hinge coupling portion so that the connecting rod is folded;
Including, a folding mower. According to claim 1,
When the side on which the cutting surface is formed by the blade portion is defined as the lower side opposite to the upper side, the hinge coupling portion is formed on the lower side of the first and second connecting rod coupling portions, and the locking portion is the first and second connecting rod Formed on the upper side of the coupling portion, a folding brush cutter. According to claim 2,
The locking part,
A lever fixing part protruding upward from the front end of the first connecting rod 510;
a ring fixing part protruding upward from the rear end of the second connecting rod 520 and contacting the lever fixing part 120 when the mowing machine 1000 is unfolded;
A fixed lever whose front end is hinged to the lever fixing part so that the rear end rotates with the lever fixing part as a hinge axis;
The rear side end is hinged to the fixed lever to engage the ring fixing part to couple the lever fixing part and the ring fixing part, or release the ring fixing part to release the coupling of the lever fixing part and the ring fixing part. A fixed ring coupled to the front end of which rotates with the fixed lever as a hinge axis; includes,
The fixing ring is engaged in or released from the ring fixing part by the front hinge rotation of the fixing lever, and when the fixing ring is caught in the ring fixing part by the rear hinge rotation of the fixing lever, the fixing ring A folding brush cutter characterized in that it maintains the hooked state by pressing to the rear side. According to claim 3,
The mowing machine,
A foldable lawn mower comprising a separation prevention rib protruding forward from an upper end of the ring fixing part to prevent separation due to upward movement of the fixing ring when the fixing ring is locked. According to claim 3,
The mowing machine,
An injury prevention member provided in the hinge coupling portion so that the connecting rod is folded or unfolded only when a certain load is applied when the locking portion is released, and applies elasticity to the hinge coupling portion in an axial direction. According to claim 5,
The injury prevention member,
A folding brushcutter, characterized in that the wave washer provided in the hinge coupling part. According to claim 3,
Inside the connecting rod, a wire for transmitting power of the power supply unit and the control signal of the driving unit to the driving unit is installed,
A damage prevention protrusion is formed on the hinge joint to guide the folding of the wire and protect the wire when the connecting rod is folded,
The damage prevention protrusion,
The front side is formed on the inner surface of the front side end of the first connecting rod and protrudes upward from the lower side, and the rear side is formed on the inner surface of the rear side end of the second connecting rod and protrudes upward from the lower side. When folded, the first and second connecting rods protrude in a semicircular shape outside the connecting rods, and the wire is configured to come into contact with each other in a circumferential direction.

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