KR20210051871A - Lightweight rechargeable mowers for ease of use - Google Patents

Abstract

The present invention relates to an easy-to-use lightweight rechargeable brush cutter and, more specifically, to a technique of a new concept which reduces the weight of a portion on which a cutting blade is installed, reduces the size and weight of a motor case to provide convenience in brush cutting work, and greatly improves the work efficiency and fatigue reduction of a worker. A conventional brush cutter has a motor-embedded motor case installed on the lower end of a work bar to have a very heavy cutting blade portion to require a large force for lifting the cutting blade from the ground to perform brush cutting work to be prevented from being easily used and cause the problem of degraded work efficiency. To resolve the problem, a motor case is installed on the upper end of a work bar which gets close to the body of a worker, and a cutting blade is installed on the lower end of the work bar to reduce the weight of a portion on which the cutting blade is installed to facilitate work. Only a motor, a PWM controller, and a relay are embedded and installed in the motor case to reduce the size and weight of the motor case.

Description

Lightweight rechargeable mowers for ease of use

The present invention relates to a new concept of technology that reduces the weight of the portion where the blade is installed, and provides convenience for the mowing operation by implementing compactness and weight reduction of the motor case, and significantly improves the fatigue and work efficiency of workers.

In general, an engine driven mower is used during mowing work. After starting the engine, when the throttle valve is pulled, the blade rotates and cuts weeds or miscellaneous trees.At this time, the blade rotates on the workbench above the blade to prevent the cut weeds from splashing on the worker. A safety cover is installed for this purpose.

The engine-driven lawnmower uses fuel to obtain strong power and uses that power to strongly rotate the blade to cut grass and weeds. Such a lawnmower is equipped with a gasoline engine and can cut the grass while moving by transmitting the power of the engine to the blade.

However, the engine-powered lawnmower is heavy and difficult to carry. In addition, it has the advantage of being able to mow regardless of the type of grass or weeds due to the strong rotational power of the engine, but severe heat generation, noise, and vibration are generated when the engine is driven. There was a problem that soot was generated.

In addition, the engine noise is high, and when used in a residential area, there is a case of causing nuisance due to the noise. In addition, the engine-powered lawnmower is vibrated so severely that it is difficult for women and the elderly to handle it, and even for men, long-term use is a burden on the body.

In order to solve such a problem, a lawnmower powered by electricity is used instead of an engine.

Mowers that use a motor require power, but most of the commercially available lawnmowers use commercial power, and power is supplied to the motor by connecting an outlet.

However, a lawnmower using a commercial power source needs to carry a long feed line during work, so accidents often occur in which a rotating blade cuts the feed line during mowing work.

Therefore, attention has been paid to a lawnmower using a battery instead of a commercial power source, and as a prior art related to a lawnmower using such a battery, "Patent Registration No. 12059991, name/portable power supply for electric lawnmower" is disclosed.

The prior art provides a convenient effect of using the battery for a long time by continuously charging electricity to a battery for driving the electric lawnmower by being worn on a part of the body and reducing the weight and volume of the electric lawnmower.

However, in the prior art, as a motor case 3 with a built-in motor is installed at the bottom of the working rod 1 as shown in FIG. 12, the cutting blade 5 is very heavy during the cutting operation, so that the cutting blade is floated from the ground, so that there is a lot of power during the operation. For example, it is difficult to use and causes a problem of lowering work efficiency.

In the present invention, as a means to solve the above problems, the motor case is installed on the upper part of the working rod close to the operator's body, and only the blade is installed at the lower end of the working rod to reduce the weight of the part where the blade is installed, making it easier to work. We develop the skills to make it possible.

In addition, the present invention devises a technology that allows the motor case to be compact and lightweight by installing only a motor, a PWM controller, and a relay inside the motor case.

In addition, the present invention seeks a technology that enables the motor support formed in the motor case to support the motor without flow and to prevent rotation of the motor to prevent vibration, noise, and damage to the motor case.

According to the present invention, a motor case is installed at the top of the working rod, and only a light blade is installed at the lower end of the working rod, so that the weight of the portion where the blade is installed is small, so that the force is less for the operation of mowing while swinging the blade from the ground and swinging left and right The fatigue of the worker is low, the mowing work is very easy, and the work efficiency is remarkably improved.

In addition, the present invention improves the convenience of use by reducing the overall weight of the lawnmower by further reducing the size of the motor case by making the motor case more compact and lightweight by installing only the motor, PWM controller, and relay excluding the heavy-weight battery inside the motor case. , Provides an effect that is easy to store.

In addition, the present invention is rigidly fixed so that the motor does not flow or rotate inside the motor case, as well as the PWM controller is rigidly fixed to prevent vibration and noise during use, thereby reducing operator fatigue and preventing damage to the motor case. Thus, it provides the effect of improving the durability.

In addition, a battery that supplies power to the motor is configured separately from the lawnmower, and the battery is stored in a backpack that can be worn on the shoulder, thereby reducing the weight and volume of the lawnmower to provide a very convenient effect of use.

1 is a perspective view of a rechargeable lawnmower to which the present invention is applied
Figure 2 is a front view of the present invention rechargeable lawnmower
3 is a perspective view of a motor, a PWM controller, and a relay installed in the motor case from which the second motor case of the present invention is separated
Figure 4 is an inner view of the first motor case of the present invention
5 is an inner view of the second motor case of the present invention
Figure 6 is an inner view of a state in which a motor, a PWM controller, and a relay are installed in the first motor case of the present invention
7 is a cross-sectional view taken along line AA of FIG. 6 of the present invention
8 is a side cross-sectional view of the first and second motor cases of the present invention and a state in which the motor is assembled
9 is a cross-sectional view taken along line B-=B in FIG. 6 of the present invention
10 is a side cross-sectional view of a state in which the first and second motor cases of the present invention and the PEM controller are assembled
11 is a perspective view of a connection state of a rechargeable lawnmower and a battery according to the present invention
12 is a perspective view of a conventional electric mower

It will be described with respect to a preferred embodiment for implementing the solution to the problem to be solved by the present invention in more detail.

Looking schematically based on the accompanying drawings, the overall configuration according to a preferred embodiment of the present invention, the working rod 100, the blade 200, the motor 300, the motor case 400, the PWM controller 500, the relay ( 600).

Hereinafter, it will be described in more detail to facilitate the implementation of the present invention made of the above schematic configuration.

Firstly, in the present invention, a replaceable blade 200 is rotatably installed at the lower end of the working rod 100, and the clutch housing 310 attached to the front of the motor 300 is integrally installed at the upper end of the working rod 100. By being directly connected to the motor 300, the blade 200 rotates smoothly according to the operation of the motor 300, as well as the power of the motor 300 transmitted to the blade 200 according to the clutch operation in the clutch housing 310 can be easily regulated. In addition, the motor case 400 is installed to surround the outside of the motor 300, so that external exposure of the motor 300 can be prevented.

And inside the motor case 400, a PWM controller 500 that controls the rotational speed of the motor 300 is installed at the rear of the motor 300, and the input reaches a certain value at the rear of the PWM controller 500. The relay 600, which is a device that opens and closes another circuit by operating when it is performed, is installed.

That is, in the present invention, only the light blade 200 is installed at the lower end of the working rod 100, and the motor 300 is directly connected to the upper end of the working rod 100 adjacent to the operator's body during the cutting operation, so that the blade 200 is The weight of the installed part is greatly reduced, so that the operator's power is low when mowing while the working rod 100 is swinging left and right while the cutting blade 200 is normally floating from the ground, so the work is very easy. The operator's fatigue is very low, and the blade 200 prevents damage or debris when it touches the ground, thereby preventing safety accidents, and providing a special effect of greatly improving work efficiency.

The motor case 400 is equipped with a new technology that allows the motor case 400 to be compact and lightweight by installing only the motor 300, the PWM controller 500, and the relay 600 inside. do.

As a technical configuration for this, the motor case 400 includes a pair of first and second motor cases 410 and 430 that are separated from the left and right as shown in FIGS. 4 to 5 and are integrally assembled to face each other.

The first motor case 400 has a motor front support plate 411 and a motor rear support plate 412 formed at intervals before and after the inside as shown in FIG. 4, and the motor front support plate 411 and the motor rear support plate 412 A square motor support 414 is formed on the upper and lower sides of the motor support plate 413 in which a pair of motor outer surface support plates 413 are integrally connected, so that a motor insert 415 into which the motor 300 is inserted is formed inside the motor support body 414 And, a pair of housing outer support plates 416 are formed at the upper and lower centers of the motor front support plate 411, and both sides of the motor insertion part 415 are respectively formed between the pair of housing outer support plates 416. The housing insert 417 is formed in communication with the inside and outside.

In addition, a pair of controller front support 418 and controller rear support 419 are formed in the rear and rear of the motor rear support plate 412, respectively, spaced up and down, and the controller front support 418 and the controller rear support 419 The upper and lower sides of the controller are formed with an angle-type controller lower surface support 421 that surrounds the corners of the controller upper surface support 420 and the PWM controller 500, respectively, so that the PWM controller 500 can be stably fixed and installed, and the pair of controllers A relay holder 422 for fixing the relay 600 is formed at the rear end of the rear support 419.

In addition, the second motor case 430 has a motor front support plate 431 and a motor rear support plate 432 respectively formed at intervals before and after the inside as shown in FIG. 5, and the motor front support plate 431 and the motor rear support plate ( The motor insert 435 into which the motor 300 is inserted into the motor support 434 by forming a square motor support 434 in which a pair of motor outer support plates 433 are integrally connected to each other on the upper and lower sides of the 432 Is formed, and a pair of housing outer support plates 436 are formed respectively above and below the center of the motor front support plate 431, and both sides of the motor insert 435 are formed between the pair of outer surface support plates 436, respectively. ), while the housing insertion portion 437 communicating with the inside and outside of the motor is formed, the controller side support 438 is protruded at the rear of the motor rear support plate 432.

Accordingly, the motor 300 and the clutch housing 310 are inserted and fixed to the motor insertion parts 415 and 435 and the housing insertion parts 417 and 437 as shown in FIGS. 2 and 6 to be firmly fixed without flow, In the space between the pair of controller front support 418 and the pair of controller rear support 419, the controller upper surface support 420 and the controller lower surface support 421, one side of the PWM controller 500 is fitted and fixed. The controller side support 438 presses and fixes the other side of the PWM controller 500 so that the PWM controller 500 is firmly fixed without flow, and the relay 600 passes through the piece 601 on the relay holder 422 So that it can be fixed.

Here, the pair of first and second motor cases 410 and 430 are formed to protrude so that a plurality of coupling protrusions 410a and 430a face each other along the inner circumference so that they can be integrally assembled with each other, and the coupling The protrusions 410a and 430a may be integrally assembled by passing through a piece in a butted state, and a fitting protrusion 410b and a fitting groove 430b are formed on opposite sides, respectively, so that a pair of first and second The motor cases 410 and 430 are coupled more firmly, as well as prevent foreign matter or fine dust from flowing into the interior, and a plurality of ventilation holes 410c and 430c are formed on the outer surface of each of the motors 300 to generate heat. Provides the effect of preventing.

In addition, between the motor front support plate 411 and the motor rear support plate 412, as shown in Figs. 7 to 8, a pair of upper and lower motor rotation stops 423 are connected, and the motor rotation stop 423 has A plurality of bolt fastening protrusions 302 protruding from the outer surface of the rear housing 301 of the motor 300 are fixed, respectively, to prevent rotation of the motor 300 to prevent vibration and noise during mowing work to reduce operator fatigue. And, it provides a special effect of improving the durability by preventing damage to the motor case 400.

In addition, a plurality of motor gripping plates 424 that are gripped while surrounding the outer surface of the motor 300 are connected and installed between the pair of motor outer surface support plates 413 with a front and rear distance apart, and the outer surface support plate 416 of the housing A housing gripping plate 425 that wraps and grips the outer surface of the clutch housing 310 is connected and installed at the center and rear ends of the motor 300 while fixing the motor 300 and the clutch housing 310 more firmly. Vibration and noise can be prevented.

On the other hand, in the present invention, the power cable 700 connected to the inside of the motor case 400 has a connection jack 701 formed at the tip as shown in FIG. 11, and a socket 801 protrudes from the separately separated battery 800 As a result, the connection jack 701 is plugged into the socket 801 of the battery 800 stored in the backpack worn on the shoulder, and power is supplied to the motor 300 to enable normal use of the lawnmower, and the battery 800 It provides convenience in use by reducing the weight and volume of the lawnmower by charging it when its capacity is reached and using it continuously.

1, 100: working rod 3, 400: motor case
5, 200: blade 300: motor
301: rear housing 302: bolt fastening protrusion
410: first motor case 410a, 430a: coupling protrusion
410b: fitting projection 410c, 430c: vent hole
411, 431: motor front support plate 412, 432: motor rear support plate
413, 433: motor outer support plate 414, 434: motor support
415, 435: motor insertion part 416, 436: housing outer surface support plate
417, 437: housing insert 418: controller front support
419: controller rear support 420: controller upper support
421: controller lower surface support 422: relay holder
423, 443: motor rotation stop 424, 444: motor gripping plate
425, 445: housing gripping plate 430: second motor case
430b: fitting groove 438: controller side support
500: PWM controller 600: relay
700: power cable 701: connection jack
800: battery 801: socket

Claims (6)

A blade 200 rotatably installed at the lower end of the working rod 100;
A motor 300 to which the clutch housing 310 attached to the front is integrally connected to the working rod 100;
A motor case 400 installed to surround the outside of the motor 300;
A PWM controller 500 installed inside the motor case 400;
Easy-to-use lightweight rechargeable lawnmower, characterized in that consisting of a relay (600) installed inside the motor case (400).
The method of claim 1,
The motor case 400 is separated from the left and right, and is composed of a pair of first and second motor cases 410 and 430 which are integrally assembled to face each other;
The first motor case 400 has a square motor support 414 in which a pair of motor outer support plates 413 are integrally connected above and below the motor front support plate 411 and the motor rear support plate 412 respectively formed before and after the inside. ), a motor insertion part 415 is formed inside, and both sides of the motor insertion part 415 are formed between a pair of outer surface support plates 416 respectively formed in the upper and lower centers of the motor front support plate 411. A housing insertion part 417 communicating with the inside and the outside is formed, and a pair of controller front supports 418 and controller rear supports 419 are formed in the rear and rear sides of the motor rear support plate 412, respectively, spaced up and down. In addition, a controller upper support 420 and a controller lower surface support 421 are formed above and below between the controller front support 418 and the controller rear support 419, respectively, and at the rear end of the pair of controller rear support 419 A relay fixing stand 422 is formed;
The second motor case 430 has a square motor support 434 in which a pair of motor outer support plates 433 are integrally connected above and below the motor front support plate 431 and the motor rear support plate 432 respectively formed before and after the inside. ), the motor insertion portion 435 is formed, and both sides of the motor insertion portion 435 are formed between the pair of outer surface support plates 436 respectively formed in the upper and lower center of the motor front support plate 431. A housing insertion part 437 communicating with the inside and outside is formed, and a controller side support 438 protrudes at the rear of the motor rear support plate 432.
The method of claim 2,
The motor 300 and the clutch housing 310 are inserted and fixed to the motor insertion portions 415, 435 and the housing insertion portions 417, 437, and the pair of controller front supports 418 and the pair of One side of the PWM controller 500 is fitted and fixed in the space between the controller rear support 419, the controller upper support 420, and the controller lower support 421, and the controller side support 438 is the other side of the PWM controller 500. The side is pressed and fixed, and the relay 600 is fixed to the relay holder 422 through a piece 601, which is a convenient lightweight rechargeable lawnmower.
The method of claim 2,
A pair of upper and lower motor rotation stops 423 are connected between the motor front support plate 411 and the motor rear support plate 412, and the rear housing 301 of the motor 300 is connected to the motor rotation stop 423. ) Easy-to-use lightweight rechargeable lawnmower, characterized in that a plurality of bolt fastening protrusions 302 formed protruding on the outer surface are fixed to each other to prevent rotation of the motor 300.
The method of claim 2,
Between the pair of motor outer surface support plates 413, a plurality of motor gripping plates 424 that are gripped while surrounding the outer surface of the motor 300 are connected and installed at a front and rear distance, and between the outer surface support plates 416 of the housing In the center and rear end, respectively, a housing gripping plate 425 for gripping while surrounding the outer surface of the clutch housing 310 is connected and installed, which is a convenient lightweight rechargeable lawnmower.
The method of claim 1,
The power cable 700 connected to the inside of the motor case 400 has a connection jack 701 formed at its front end, and a socket formed in a separate battery 800 accommodated in a backpack that can wear the connection jack 701 on the shoulder ( Easy-to-use lightweight rechargeable lawnmower, characterized in that it is inserted into 801) and supplies power to the motor 300.

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