KR101727269B1 - Portable manual type lawn trimmer - Google Patents

Abstract

The present invention relates to a portable manual lawn mowing machine, and more particularly, to a manual lawn mowing machine which is capable of simplifying parts and lightening a machine by improving the structure of a work table where a cutter for cutting a weed or a knife is mounted, The present invention relates to a portable manual lawn mower which can be driven and used immediately at any time through the generation of self-generated power by the driver.
According to the present invention, there is provided a work table having a predetermined length and capable of adjusting the length so that the user can grasp the hand, walk while standing, A cutter capable of cutting a weed or a weed that has grown from the ground by rotating with the power in a state of being mounted on the front end of the worktable; A power unit connected to the workbench to generate power to the cutter, wherein the power unit is capable of generating self-power according to a predetermined arm swinging behavior of the user; And a support unit that supports the power unit by holding the power unit on a part of the user's body in a fixed state.

Description

Portable manual lawn mower {PORTABLE MANUAL TYPE LAWN TRIMMER}

The present invention relates to a portable manual lawn mowing machine, and more particularly, to a manual lawn mowing machine which is capable of simplifying parts and lightening a machine by improving the structure of a work table where a cutter for cutting a weed or a knife is mounted, The present invention relates to a portable manual lawn mower which can be driven and used immediately at any time through the generation of self-generated power by the driver.

A lawn trimmer is a machine used to cut grass by using a rapidly rotating cutter. It has a wide range of weeds (weeds) and brushes (scrub, 雜木) can be cut in a short time, so it is necessary to manage large open area (Exposed ground, Open country, open land) .

In most of the cases, it is used mainly for the purpose of trimming the lawn by using a machine in the form of a vehicle in foreign countries. In Korea, however, it is often used for the purpose of removing the weeds from the cemetery in the fields of hills and hills, ) Is a portable type lawn mower that is placed on the shoulder or carried on the shoulder due to its geographical characteristics, and has been widely used in Korea Registered Utility Model No. 20-0236652 (entitled "Non-electric power pumping device") and Korean Patent Registration No. 10 -0607493 discloses an electric lawn mower driven by an engine or a motor (the invention is called a lawn mower).

However, the electric power cutter using the conventional engine is excellent in the cutting power, but the exhaust gas is heavier and a lot of substances that are very dangerous to human body such as carcinogenic substances are discharged in a large amount compared with the general automobile. In addition, since the price of the product is high due to the adoption of the engine and the noise and vibration at the time of driving the engine are directly transmitted to the worker, the worker's attention is disturbed due to the structural relation, And it is exposed to the problem of causing an accident that can give a fatal injury such as being burdened.

However, since the cutting power is significantly lower than that of the engine driven type and the weight of the battery is inconvenient when used for a long time, various problems such as safety and efficiency can be solved .

Furthermore, since an energy source such as an oil box or a battery is necessarily required depending on an engine driving method or a motor driving method, an increase in the weight and volume of the equipment resulting therefrom, and a cost expenditure due to energy consumption and waste Can not be neglected.

In addition, in order to maintain the parallelism when the cutter is brought close to the ground by tilting the workpiece held by the hand due to the nature of the work of walking around and removing weeds, the tip of the workpiece must be bent in one direction, A pair of conical bevel gears, which are used to transfer motion between two axes intersecting each other, must be provided, as is the case in the prior art, such as in Japanese Patent Application No. 1438318 (entitled "Mowing Blade Driving Device and Blade Drive Method" The cutter can receive the rotational power from the shaft that rotates within the worktable itself. Because of this, the structure of the part is very complicated and the weight of the workbench and the cutter has caused a considerable inconvenience to a person carrying the work with one hand and performing a long time.

(Patent Document 1) Korean Utility Model Registration No. 20-0236652 (Registered Date: 2001. 06. 21.)

(Patent Document 2) Korean Patent No. 10-0607493 (Registered Date: May 05, 2006)

(Patent Document 2)

(Patent Document 3) Korean Patent No. 10-1438318 (Registration date: 2014. 08. 29.)

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a hand-held power device for generating a linear motion generated according to an operator's arm swing behavior to an increased rotational motion, And it is an object of the present invention to provide a portable manual lawn mower which can rotate and drive a cutter blade to cut a weed or a weed without requiring a separate electric power drive device to be driven.

Another object of the present invention is to replace a flexible power cable which simultaneously rotates and rotates by the rotation of the inserted wire with a power transmission means provided inside the work table, Which can not be conveyed, by using a metal shaft, the bevel gear, which is always mounted on the bending tip of the work table, can be omitted, and rotational power can be transmitted to the cutter.

According to an aspect of the present invention, there is provided a work table comprising: a work table having a predetermined length so that a user can grasp the work, A cutter capable of cutting a weed or a weed that has grown from the ground by rotating with the power in a state of being mounted on the front end of the worktable; A power unit connected to the workbench to generate power to the cutter, wherein the power unit is capable of generating self-power according to a predetermined arm swinging behavior of the user; And a support unit that supports the power unit by holding the power unit on a part of the user's body in a fixed state.

A bending pipe bent and bent at an intermediate portion is connected to the front end of the extension bar so that the cutter has a corresponding angle in a state in which the cutter is parallel to the paper surface when the workbench is tilted. The first power cable is connected to a first end of the first power cable and a second end of the first power cable is connected to the first end of the cutter, And a connecting chuck is further coupled.

In addition, the operating handle is integrally formed with a plate gear that transmits power generated by the upward and downward reciprocating motions of the gripping side by the user's arm swinging action to the driving body, A driven gear which is engaged and rotated by the driving gear, a rotating gear which is rotated by engaging with the driven gear, and a driven gear which is simultaneously rotated in a state of being axially coupled to the rotating gear, And a centrifugal weight for maintaining a constant rotational force.

Further, the operating handle is integrally formed with a plate gear that transmits power generated by the upward and downward reciprocating motions of the gripping side by the user's arm swinging action to the driving body, A driven gear rotatably engaged with the drive gear; a rotating gear rotatably engaged with the driven gear; and a driven gear rotatably engaged with the driven gear, And a centrifugal weight for maintaining a constant rotational force in one direction by centrifugal force according to its own weight.

In addition, to the rotation gear, a rotation is transmitted in only one direction due to the action of a pawl so as not to transmit a reverse rotation force due to the lifting of the manipulation handle to the centrifugal weight, And a ratchet is integrally coupled.

As can be clearly understood from the above description, the portable manual lawn mower of the present invention is capable of generating power capable of rotating and driving the cutter without consuming oil or electric energy, In addition to improving the functionality, it eliminates the waste of energy resources and the expense of incidental expenses, and also improves working environment and environment by preventing the noise and vibration which are inevitably generated when driving the engine or motor. .

In addition, since the rotation and stop of the cutter can be easily performed without the operation of a controller (switch or the like) for driving the apparatus, and the operation of the cutter can not be stopped when an unexpected situation occurs, It is possible to secure safety from the risk of the occurrence of an accident such as cutting and bum injury.

At the same time, with the achievement of the various effects described so far, anyone can easily use the machine for the aged and the elderly, eliminating the conventional electric power driven by the energy consumption and improving the structure of the connection part between the work table and the cutter, It is possible to reduce the manufacturing cost and sales unit cost of the device through the realization of the light weight of the product, thereby securing the competitiveness of the product sales by satisfying the consumer's desire, and also contributing to the development of the agricultural machine Can be a very useful invention.

1 is a perspective view showing the overall structure of a portable manual lawn mower according to the present invention;
FIG. 2 and FIG. 3 are enlarged cross-sectional views of a main part and a main part showing a coupling structure of a work table and a cutter in a portable manual lawn mower according to the present invention.
FIGS. 3A and 3B are a plan view and a bottom view of the structure of the cutter in the portable manual lawn mower according to the present invention. FIG.
Figs. 4 to 6B are a main part perspective view, a main part side view and a yaw pillar sectional view showing the structure of the power device in the portable manual lawn mower according to the present invention. Fig.
Fig. 7 is a perspective view showing a configuration of a driving body mounted in a case of a power unit in a portable manual lawn mower according to the present invention; Fig.
Fig. 8 is a cross-sectional view of a main portion showing another configuration of a power device in a portable manual lawn mower according to the present invention; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a perspective view showing the entire structure of a portable manual lawn mower according to the present invention, and FIGS. 2 and 3 are perspective views showing a coupling structure of a work table and a cutter in a portable manual lawn mower according to the present invention, FIGS. 3A and 3B are a plan view and a bottom view showing a structure of a cutter in a portable manual lawn mower according to the present invention, and FIGS. 4 to 6B show a structure of a power device in a portable manual lawn mower according to the present invention 7 is a principal perspective view showing a configuration of a driving body mounted in a case of a power unit in a portable manual lawn mower according to the present invention, and Fig. 8 is a perspective view Fig. 3 is a side sectional view showing another configuration of a power plant in a portable manual lawn mowing machine according to the present invention.

1, the portable manual lawn mower A according to the present invention includes a work table 1 having a predetermined length and a length capable of allowing the user to grasp and hold the worker while walking, A cutter 2 capable of cutting a weed or a weed that has grown from the ground by self-rotation (hereinafter referred to as "rotation") in a state of being mounted on the front end of the worktable 1, A power unit 3 connected to the cutter 2 for generating power and capable of generating a self-power according to a predetermined arm swing action of the user, and a power unit 3 for holding the power unit 3 in a fixed state And a support portion (4) that can be carried on a portion of the user's own body. In the figure, a disc-shaped cutter 2 is shown as an example of a cutter 2. As an example for the sake of understanding, the above example is not limited in shape, shape, and the like of the cutter 2 as long as it can cut a weed or a bark grown from the ground. In the drawings, the back portion 4 is used as a support portion 4 and the back portion 4 is exemplified as a part of the body. The above example is an example for the sake of understanding, and the support 4 can depend on any part of the user's own body. The present invention will be described by using the disc cutter 2 as a cutter 2 as a part of the user's own body and the back 4 as a support 4 for convenience of explanation. It is clear that this description is not intended to limit the scope of rights of the hand-held manual lawnmower according to the invention.

The workbench (1) is operated by a worker (user) holding the worker (user) with his / her hand held in a forward direction so as to perform the mowing work for grassing, and the weeds and the grass The length of the fabric 11 can be adjusted by connecting the fabric 11 having a predetermined length to the extension 12 which is in contact with the front end of the fabric 11, The first power cable having a flexible characteristic capable of being turned and transferred finally to the cutter 2 while receiving the rotational power generated from the power unit 3 while being inserted into the cutter 2 along the longitudinal direction of the cutter 2, (13).

An adapter 111 required for connection between the second power cable of the power unit 3 to be described later and the first power cable 13 is connected to the cloth band 11, And is further provided at one opposed end.

When the worker 1 tilts the workbench 1 in a straight line to bring the cutter 2 close to the ground, the bending pipe 121 bent and bent at an intermediate portion thereof so as to have a corresponding angle parallel to the ground surface, And a finishing pipe 122 is provided at the front end of the bending pipe 121 to expose the first power cable 13 to the outside so that the cutter 2 and the cutter 2 can be disassembled and assembled together Further connected. The first power cable 13 is exposed to the outside so that the cutter 2 can be disassembled and coupled with the cutter 2 in order to facilitate the assembly of the cutter 2 and the cutter 2. In other words, Closing pipe 122 may be further connected. In this case, the first connecting cable 142 may be coupled to the distal end of the first power cable 13 to allow simultaneous rotation through axial coupling with the cutter 2. At this time, when the worktable 1 is tilted, a predetermined distance from the front end of the elongated strip 12 to the gripper is set so that the cutter 2 has a corresponding angle in a state parallel to the ground The bent portion may be bent at a position away from the center portion.

The cable head 131 is coupled to the first power cable 13 at one end and the cable head 131 is fixed in the bending pipe 121 by a separate screw bolt do. A first connecting chuck 132 is coupled to the distal end of the cable head 131 to enable simultaneous rotation of the cutter 2 through axial coupling.

The cutter 2 is for cutting cutting the weeds and the weeds by rotating at a high speed after receiving the rotational power from the power unit 3 in a state of being mounted on the front end of the work table 1, A cutter head 21 which can be rotated in one direction by being axially coupled to a first connection chuck 132 provided inside the bending pipe 121 connected to the front end of the extension bar 12 of the workbench 1, A rotary plate 22 for simultaneously rotating in a state of being tightly coupled to the lower surface of the cutter head 21 and at least one rotary cutting unit 22 for simultaneously cutting the weeds and the weeds while being radially outwardly projectingly coupled to the rotary plate 22 And a cutter blade (23).

4 (a) and 4 (b), the cutter blade 23 is disposed on the lower surface of the rotary plate 22, and when the cutter blade 23 is broken due to collision with a rock or a stone during grass cutting, It is preferable to block the fragments cut in the direction of the body in advance.

The cutter head 21 is provided with a center pin 211 which is inserted into the first connection chuck 132 so as to be axially engaged with the cutter head 21 and protrudes upward from the center upper end by a predetermined length, And a fixing bundle 212 for pressing the rear end portion of the cutter blade 23 in close contact with the cutter blade 23 to firmly engage the cutter blade 23. The cutter blade 23 can be disassembled by a separate wrench bolt .

In addition, a separate screw bolt is fastened from the outside in a state where the end of the bending pipe 121 is partially inserted into the upper peripheral portion, so that the cutter 2 is connected to the front end of the work table 1 A pipe holder 213 is provided.

On the bottom surface of the rotary plate 22, one or more fixing plates 221 for assembling and maintaining the plurality of the cutter blades 23 radially arranged are assembled.

As shown in Figs. 5 to 6B, the power unit 3 can generate a self-generated power by operating an operator without using an electric power unit consuming oil or electric energy. A manipulation handle 32 for partially manipulating and hinging the inside of the case 31 and manually operating the manipulation handle 32 to generate a self- A driving body 33 combined with a plurality of gears for increasing rotational speed and rotational speed of linear motion generated by the downward reciprocating motion of the operation handle 32 while being connected to the operation handle 32, A first power cable 13 connected to the first power cable 13 and connected to the first power cable 13, and a second power cable 13 connected to the first power cable 13, 2 connecting chuck 34, The rotary power transmitted from the second connecting chuck 34 is successively transmitted to the first power cable 35 as both ends of the second connecting chuck 34 are connected to the adapter 111 of the work table 1 And a second power cable (35). In the figure, the box-shaped casing 31 is shown as an example. As an example for the sake of understanding, the above example is not limited in shape, shape and the like of a case 31 in which an inner space can be formed.

Since the plate gear 321 having the tooth form tooth portion 321-1 of the gear in a certain range is integrally formed in the operation handle 32, The power generated by the upward / downward reciprocating motion of the driving body 33 can be transmitted to the driving body 33.

7, the driving body 33 includes a driving gear 331 engaged with the tooth portion 321-1 of the plate gear 321 of the operation handle 32, And a rotary gear 333 engaged with the interlocking gear 331. The rotary gear 333 is coupled to the rotary gear 333 in such a manner that the rotary gear 333 is coupled to the rotary gear 333, And a centrifugal weight (334) for maintaining a constant rotational force.

6B, a ratchet 333 having mechanical characteristics that transmits rotation only in one direction due to the action of a pawl and does not transmit movement in the opposite direction is provided on the rotating gear 333. Further, -1) so that the reverse rotation power generated by lifting the operation handle 32 is not transmitted to the centrifugal weight 334.

A coupling pin 351 which can be fitted and connected to the adapter 111 of the fascia 11 and the second connection chuck 34 is integrally formed on both ends of both sides of the second power cable 35 Respectively.

On the other hand, as shown in Fig. 8, the same operation and effect can be obtained even if the configuration of the driving body 33 is different. More specifically, in the above-described combination of the drive bodies 33, the configuration of the tooth portion 321-1 of the plate gear 321 is omitted, and the drive gear 331 A rack 321-2 having other teeth which can be engaged with the rack gear 321-2 is further provided with a horizontal movement in which the rack 321-2 is pushed in one direction during rotation of the plate gear 321, The upper and lower linear motions using the manipulation handle 32 are converted into rotary motions in accordance with the mechanical principle of the rack and pinion and are transmitted to the interlock gear 332 in accordance with the repetitive motion May be possible.

The backrest 4 is provided for a user's manipulation (arm swinging) of the manipulation handle 32 together with a walking aid in a state in which the power unit 3 is carried on the back during the mowing operation. A shoulder belt 41 and a waist belt 42 which are wrapped around the user's shoulders and wrapped around his / her waist, while being folded in an "L" Are preferably combined together, which is illustrated in Fig.

The unspecified code s is a coil spring that exerts an elastic force for automatically restoring the operation handle 32 upward.

The operation of the portable manual lawn mower A according to the present invention will be described in detail as follows.

First, a portable manual lawn mower (A) having the structure as shown in Fig. 1 constitutes a single structure through the combination and assembly of the respective components based on the above-described description, and by using the present invention, You can manage a wide area of open space or carry out a graveyard.

To this end, the power unit 3 is placed on the backrest 4 and fixed, and then the solder belt 41 and the waist belt 42 of the backrest 4 are tightly held on both shoulders and waists, Ensure that there is no difficulty in mowing through sowing.

In this state, the power unit 3 is operated to rotate the cutter 2 mounted on the front end of the work table 1 without the need for an electric power unit for driving the battery with consumption of oil or electric power, . ≪ / RTI >

6A, the grip portion of the operation handle 32 of the power unit 3 projecting all over the one side of the upper body of the worker as the back of the worker is pushed back, The operation handle 32 is reciprocated upward and downward.

Thus, the toothed portion 321-1 formed on the plate gear 321 of the operation handle 32 is orbitally rotated in a reciprocating manner along a fixed orbit, and the driving body 33 engaged with the driven body 33 The driving gear 331, the interlocking gear 332, and the rotating gear 333 are successively rotated in a corresponding manner.

The second power cable 35 connected to the second connection chuck 34 by the simultaneous rotation of the centrifugal weight 334 and the second connection chuck 34 axially coupled to the rotation gear 333, The cutter (2) is axially coupled to the one connecting chuck (132) by the wire rotation of the first power cable (13) whose internal wire is rotated and its rotational force is inserted into the inside of the work table In addition, it is possible to cut the weeds and bushes that grow around due to the rotation drive.

At this time, the driving gear 331, the interlocking gear 332, and the interlocking gear 333 constituting the driving body 33 rotate the interlocking gear 332 four times when the driving gear 331 makes one rotation And the rotating gear 333 rotates ten times when the interlocking gear 332 makes one rotation, for example, as a relative gear ratio.

Therefore, when the rotation inertia of the centrifugal weight 334 by the rotation gear 333 is added to the acceleration rotation speed plus the rotation inertia, the operation handle 32 is rotated for one minute in the upward and downward reciprocating motion The rotation speed per minute (rpm) of the second connecting chuck 34 axially coupled to the centrifugal weight 334 is approached to 1500 revolutions so that the operating handle 32 is rotated at a high speed It is possible to rotate the cutter 2 suitable for carrying out the mowing operation for cutting the weeds and the weeds even if it is not forcibly operated.

In summary, self-power generation using the portable manual lawn mower (A) according to the present invention allows the cutter 2 to be rotated and unwound without the need for a separate energy-consuming electric power system, 32) can be operated only by user's operation for upward and downward reciprocating movements. By using a flexible power cable (1), the number of related parts is greatly simplified by omitting the gears (bevel gears) Thereby achieving various effects such as achieving weight reduction of the apparatus and reducing the manufacturing cost and the selling unit cost of the apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope and spirit of the invention.

A: lawn mower, 1: work table, 2: cutter
3: Power unit, 4: Backrest, 11: Fascia
12: extension cable, 13: first power cable, 21: cutter head
22: a rotating plate, 23: a cutter blade, 31: a case
32: operating handle, 33: driving body, 34: second connecting chuck
35: second power cable, 41: solder belt, 42: waste belt
111: Adapter, 121: Bending pipe, 122: Closed pipe
131: cable head, 132: first connecting chuck, 211: center pin
212: fixed bundle, 213: pipe holder, 221: fixed plate
321: plate gear, 321-1: tooth portion, 321-2: rack
331: driving gear 332: interlocking gear, 333: turning gear,
333-1: ratchet 334: centrifugal weight 351:

Claims (9)

A workbench which has a certain length and can be adjusted in length so that the user can grasp the hand, walk while standing,
A cutter capable of cutting a weed or a weed that has grown from the ground by rotating with the power in a state of being mounted on the front end of the worktable;
A power unit connected to the workbench to generate power to the cutter, wherein the power unit is capable of generating self-power according to a predetermined arm swinging behavior of the user; And
And a support portion for holding the power unit on a part of the user's own body in a state where the power unit is mounted and fixed,
The power unit includes a case having an internal space,
An operation handle capable of manual operation for generating a self-power by a user's hand-held and reciprocating motion with a predetermined radius, and a hinge-
A driving body combined with a plurality of gears connected to the operating handle to increase the rotational speed and the rotational speed of the linear motion caused by the upward and downward reciprocating motions of the operating handle,
A second connection chuck which is connected to the driving body and receives rotation power generated by operation of the driving body and rotates simultaneously and becomes a connection member for transmitting power to the work,
And a second power cable connected to both of the second connection chuck and the work table so as to transmit rotational power from the second connection chuck to the work table in succession. The method according to claim 1,
The worktable can be adjusted in length by connection between a fastener having a predetermined length and a fastener that is retracted from the distal end of the fastener,
And a first power cable which receives the rotational power generated from the power unit in a state where the power unit is continuously inserted in the longitudinal direction along the fascia and the elongated band and finally transmits the rotational power to the cutter, Manual mowers. The method according to claim 1,
Wherein the cutter has a cutter head capable of rotating in one direction with being axially coupled to the end of the workbench,
A rotary plate which is rotated in a state of being closely coupled to a lower surface of the cutter head,
And one or more cutter blades for simultaneously cutting the weeds and the wefts while being radially outwardly projected and coupled to the rotation plate. delete 3. The method of claim 2,
And a finishing pipe connected to the cutter for disassembling and coupling the first power cable to the cutter so that the first power cable is exposed to the outside,
The first power cable is further coupled to a first connecting chuck at the front end thereof to enable simultaneous rotation through axial coupling with the cutter,
And a bent portion bent and bent at a predetermined distance from the front end of the elongated body so as to have a corresponding angle in a state in which the cutter is parallel to the paper surface when the worktable is tilted is formed on the elongated strip. Portable manual mowers. 3. The method of claim 2,
A bending pipe bent and bent at an intermediate portion thereof is connected to the leading end so that the cutter has a corresponding angle in a state in which the cutter is parallel to the paper surface when the working table is tilted,
And a finishing pipe is connected to the front end of the bending pipe to expose the first power cable to the outside so that the cutter can be disassembled and assembled so as to be easily assembled with each other,
Wherein the first power cable is further provided with a first connection chuck at its distal end for enabling simultaneous rotation through axial coupling with the cutter. The method according to claim 1,
Wherein the operating handle is provided with a plate gear integrally formed with a plate gear which transmits power generated by upward and downward reciprocating motions of the gripping side by the user's arm swinging action to the driving body,
Wherein the driving body includes: a driving gear that is engaged with the plate gear; an interlocking gear that is engaged with the driving gear; a rotating gear that is engaged with the interlocking gear; And a centrifugal weight for maintaining a constant rotational force in one direction by centrifugal force according to its own weight. The method according to claim 1,
Wherein the operating handle is provided with a plate gear integrally formed with a plate gear which transmits power generated by upward and downward reciprocating motions of the gripping side by the user's arm swinging action to the driving body,
Wherein the driving body includes a rack which is horizontally moved in both directions by the plate gear, a driving gear which is engaged with the rack, an interlocking gear which is engaged with the driving gear, And a centrifugal weight that simultaneously rotates in a state of being axially coupled to the rotating gear and maintains a constant rotational force in one direction by centrifugal force according to its own weight. 9. The method according to any one of claims 7 to 8,
The ratchet is provided with a ratchet that transmits rotation only in one direction due to the action of the pawl and does not transmit movement in the opposite direction so that a reverse rotation force due to the lifting of the manipulation handle is not transmitted to the centrifugal weight Portable manual mowers with features.

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